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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * vvvvvvvvvvvvvvvvvvvvvvv Original vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv
4 * Copyright (C) 1992 Eric Youngdale
5 * Simulate a host adapter with 2 disks attached. Do a lot of checking
6 * to make sure that we are not getting blocks mixed up, and PANIC if
7 * anything out of the ordinary is seen.
8 * ^^^^^^^^^^^^^^^^^^^^^^^ Original ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
9 *
10 * Copyright (C) 2001 - 2021 Douglas Gilbert
11 *
12 * For documentation see http://sg.danny.cz/sg/scsi_debug.html
13 */
14
15
16#define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__
17
18#include <linux/module.h>
19#include <linux/align.h>
20#include <linux/kernel.h>
21#include <linux/errno.h>
22#include <linux/jiffies.h>
23#include <linux/slab.h>
24#include <linux/types.h>
25#include <linux/string.h>
26#include <linux/fs.h>
27#include <linux/init.h>
28#include <linux/proc_fs.h>
29#include <linux/vmalloc.h>
30#include <linux/moduleparam.h>
31#include <linux/scatterlist.h>
32#include <linux/blkdev.h>
33#include <linux/crc-t10dif.h>
34#include <linux/spinlock.h>
35#include <linux/interrupt.h>
36#include <linux/atomic.h>
37#include <linux/hrtimer.h>
38#include <linux/uuid.h>
39#include <linux/t10-pi.h>
40#include <linux/msdos_partition.h>
41#include <linux/random.h>
42#include <linux/xarray.h>
43#include <linux/prefetch.h>
44#include <linux/debugfs.h>
45#include <linux/async.h>
46
47#include <net/checksum.h>
48
49#include <asm/unaligned.h>
50
51#include <scsi/scsi.h>
52#include <scsi/scsi_cmnd.h>
53#include <scsi/scsi_device.h>
54#include <scsi/scsi_host.h>
55#include <scsi/scsicam.h>
56#include <scsi/scsi_eh.h>
57#include <scsi/scsi_tcq.h>
58#include <scsi/scsi_dbg.h>
59
60#include "sd.h"
61#include "scsi_logging.h"
62
63/* make sure inq_product_rev string corresponds to this version */
64#define SDEBUG_VERSION "0191" /* format to fit INQUIRY revision field */
65static const char *sdebug_version_date = "20210520";
66
67#define MY_NAME "scsi_debug"
68
69/* Additional Sense Code (ASC) */
70#define NO_ADDITIONAL_SENSE 0x0
71#define LOGICAL_UNIT_NOT_READY 0x4
72#define LOGICAL_UNIT_COMMUNICATION_FAILURE 0x8
73#define UNRECOVERED_READ_ERR 0x11
74#define PARAMETER_LIST_LENGTH_ERR 0x1a
75#define INVALID_OPCODE 0x20
76#define LBA_OUT_OF_RANGE 0x21
77#define INVALID_FIELD_IN_CDB 0x24
78#define INVALID_FIELD_IN_PARAM_LIST 0x26
79#define WRITE_PROTECTED 0x27
80#define UA_RESET_ASC 0x29
81#define UA_CHANGED_ASC 0x2a
82#define TARGET_CHANGED_ASC 0x3f
83#define LUNS_CHANGED_ASCQ 0x0e
84#define INSUFF_RES_ASC 0x55
85#define INSUFF_RES_ASCQ 0x3
86#define POWER_ON_RESET_ASCQ 0x0
87#define POWER_ON_OCCURRED_ASCQ 0x1
88#define BUS_RESET_ASCQ 0x2 /* scsi bus reset occurred */
89#define MODE_CHANGED_ASCQ 0x1 /* mode parameters changed */
90#define CAPACITY_CHANGED_ASCQ 0x9
91#define SAVING_PARAMS_UNSUP 0x39
92#define TRANSPORT_PROBLEM 0x4b
93#define THRESHOLD_EXCEEDED 0x5d
94#define LOW_POWER_COND_ON 0x5e
95#define MISCOMPARE_VERIFY_ASC 0x1d
96#define MICROCODE_CHANGED_ASCQ 0x1 /* with TARGET_CHANGED_ASC */
97#define MICROCODE_CHANGED_WO_RESET_ASCQ 0x16
98#define WRITE_ERROR_ASC 0xc
99#define UNALIGNED_WRITE_ASCQ 0x4
100#define WRITE_BOUNDARY_ASCQ 0x5
101#define READ_INVDATA_ASCQ 0x6
102#define READ_BOUNDARY_ASCQ 0x7
103#define ATTEMPT_ACCESS_GAP 0x9
104#define INSUFF_ZONE_ASCQ 0xe
105
106/* Additional Sense Code Qualifier (ASCQ) */
107#define ACK_NAK_TO 0x3
108
109/* Default values for driver parameters */
110#define DEF_NUM_HOST 1
111#define DEF_NUM_TGTS 1
112#define DEF_MAX_LUNS 1
113/* With these defaults, this driver will make 1 host with 1 target
114 * (id 0) containing 1 logical unit (lun 0). That is 1 device.
115 */
116#define DEF_ATO 1
117#define DEF_CDB_LEN 10
118#define DEF_JDELAY 1 /* if > 0 unit is a jiffy */
119#define DEF_DEV_SIZE_PRE_INIT 0
120#define DEF_DEV_SIZE_MB 8
121#define DEF_ZBC_DEV_SIZE_MB 128
122#define DEF_DIF 0
123#define DEF_DIX 0
124#define DEF_PER_HOST_STORE false
125#define DEF_D_SENSE 0
126#define DEF_EVERY_NTH 0
127#define DEF_FAKE_RW 0
128#define DEF_GUARD 0
129#define DEF_HOST_LOCK 0
130#define DEF_LBPU 0
131#define DEF_LBPWS 0
132#define DEF_LBPWS10 0
133#define DEF_LBPRZ 1
134#define DEF_LOWEST_ALIGNED 0
135#define DEF_NDELAY 0 /* if > 0 unit is a nanosecond */
136#define DEF_NO_LUN_0 0
137#define DEF_NUM_PARTS 0
138#define DEF_OPTS 0
139#define DEF_OPT_BLKS 1024
140#define DEF_PHYSBLK_EXP 0
141#define DEF_OPT_XFERLEN_EXP 0
142#define DEF_PTYPE TYPE_DISK
143#define DEF_RANDOM false
144#define DEF_REMOVABLE false
145#define DEF_SCSI_LEVEL 7 /* INQUIRY, byte2 [6->SPC-4; 7->SPC-5] */
146#define DEF_SECTOR_SIZE 512
147#define DEF_UNMAP_ALIGNMENT 0
148#define DEF_UNMAP_GRANULARITY 1
149#define DEF_UNMAP_MAX_BLOCKS 0xFFFFFFFF
150#define DEF_UNMAP_MAX_DESC 256
151#define DEF_VIRTUAL_GB 0
152#define DEF_VPD_USE_HOSTNO 1
153#define DEF_WRITESAME_LENGTH 0xFFFF
154#define DEF_STRICT 0
155#define DEF_STATISTICS false
156#define DEF_SUBMIT_QUEUES 1
157#define DEF_TUR_MS_TO_READY 0
158#define DEF_UUID_CTL 0
159#define JDELAY_OVERRIDDEN -9999
160
161/* Default parameters for ZBC drives */
162#define DEF_ZBC_ZONE_SIZE_MB 128
163#define DEF_ZBC_MAX_OPEN_ZONES 8
164#define DEF_ZBC_NR_CONV_ZONES 1
165
166#define SDEBUG_LUN_0_VAL 0
167
168/* bit mask values for sdebug_opts */
169#define SDEBUG_OPT_NOISE 1
170#define SDEBUG_OPT_MEDIUM_ERR 2
171#define SDEBUG_OPT_TIMEOUT 4
172#define SDEBUG_OPT_RECOVERED_ERR 8
173#define SDEBUG_OPT_TRANSPORT_ERR 16
174#define SDEBUG_OPT_DIF_ERR 32
175#define SDEBUG_OPT_DIX_ERR 64
176#define SDEBUG_OPT_MAC_TIMEOUT 128
177#define SDEBUG_OPT_SHORT_TRANSFER 0x100
178#define SDEBUG_OPT_Q_NOISE 0x200
179#define SDEBUG_OPT_ALL_TSF 0x400 /* ignore */
180#define SDEBUG_OPT_RARE_TSF 0x800
181#define SDEBUG_OPT_N_WCE 0x1000
182#define SDEBUG_OPT_RESET_NOISE 0x2000
183#define SDEBUG_OPT_NO_CDB_NOISE 0x4000
184#define SDEBUG_OPT_HOST_BUSY 0x8000
185#define SDEBUG_OPT_CMD_ABORT 0x10000
186#define SDEBUG_OPT_ALL_NOISE (SDEBUG_OPT_NOISE | SDEBUG_OPT_Q_NOISE | \
187 SDEBUG_OPT_RESET_NOISE)
188#define SDEBUG_OPT_ALL_INJECTING (SDEBUG_OPT_RECOVERED_ERR | \
189 SDEBUG_OPT_TRANSPORT_ERR | \
190 SDEBUG_OPT_DIF_ERR | SDEBUG_OPT_DIX_ERR | \
191 SDEBUG_OPT_SHORT_TRANSFER | \
192 SDEBUG_OPT_HOST_BUSY | \
193 SDEBUG_OPT_CMD_ABORT)
194#define SDEBUG_OPT_RECOV_DIF_DIX (SDEBUG_OPT_RECOVERED_ERR | \
195 SDEBUG_OPT_DIF_ERR | SDEBUG_OPT_DIX_ERR)
196
197/* As indicated in SAM-5 and SPC-4 Unit Attentions (UAs) are returned in
198 * priority order. In the subset implemented here lower numbers have higher
199 * priority. The UA numbers should be a sequence starting from 0 with
200 * SDEBUG_NUM_UAS being 1 higher than the highest numbered UA. */
201#define SDEBUG_UA_POR 0 /* Power on, reset, or bus device reset */
202#define SDEBUG_UA_POOCCUR 1 /* Power on occurred */
203#define SDEBUG_UA_BUS_RESET 2
204#define SDEBUG_UA_MODE_CHANGED 3
205#define SDEBUG_UA_CAPACITY_CHANGED 4
206#define SDEBUG_UA_LUNS_CHANGED 5
207#define SDEBUG_UA_MICROCODE_CHANGED 6 /* simulate firmware change */
208#define SDEBUG_UA_MICROCODE_CHANGED_WO_RESET 7
209#define SDEBUG_NUM_UAS 8
210
211/* when 1==SDEBUG_OPT_MEDIUM_ERR, a medium error is simulated at this
212 * sector on read commands: */
213#define OPT_MEDIUM_ERR_ADDR 0x1234 /* that's sector 4660 in decimal */
214#define OPT_MEDIUM_ERR_NUM 10 /* number of consecutive medium errs */
215
216/* SDEBUG_CANQUEUE is the maximum number of commands that can be queued
217 * (for response) per submit queue at one time. Can be reduced by max_queue
218 * option. Command responses are not queued when jdelay=0 and ndelay=0. The
219 * per-device DEF_CMD_PER_LUN can be changed via sysfs:
220 * /sys/class/scsi_device/<h:c:t:l>/device/queue_depth
221 * but cannot exceed SDEBUG_CANQUEUE .
222 */
223#define SDEBUG_CANQUEUE_WORDS 3 /* a WORD is bits in a long */
224#define SDEBUG_CANQUEUE (SDEBUG_CANQUEUE_WORDS * BITS_PER_LONG)
225#define DEF_CMD_PER_LUN SDEBUG_CANQUEUE
226
227/* UA - Unit Attention; SA - Service Action; SSU - Start Stop Unit */
228#define F_D_IN 1 /* Data-in command (e.g. READ) */
229#define F_D_OUT 2 /* Data-out command (e.g. WRITE) */
230#define F_D_OUT_MAYBE 4 /* WRITE SAME, NDOB bit */
231#define F_D_UNKN 8
232#define F_RL_WLUN_OK 0x10 /* allowed with REPORT LUNS W-LUN */
233#define F_SKIP_UA 0x20 /* bypass UAs (e.g. INQUIRY command) */
234#define F_DELAY_OVERR 0x40 /* for commands like INQUIRY */
235#define F_SA_LOW 0x80 /* SA is in cdb byte 1, bits 4 to 0 */
236#define F_SA_HIGH 0x100 /* SA is in cdb bytes 8 and 9 */
237#define F_INV_OP 0x200 /* invalid opcode (not supported) */
238#define F_FAKE_RW 0x400 /* bypass resp_*() when fake_rw set */
239#define F_M_ACCESS 0x800 /* media access, reacts to SSU state */
240#define F_SSU_DELAY 0x1000 /* SSU command delay (long-ish) */
241#define F_SYNC_DELAY 0x2000 /* SYNCHRONIZE CACHE delay */
242
243/* Useful combinations of the above flags */
244#define FF_RESPOND (F_RL_WLUN_OK | F_SKIP_UA | F_DELAY_OVERR)
245#define FF_MEDIA_IO (F_M_ACCESS | F_FAKE_RW)
246#define FF_SA (F_SA_HIGH | F_SA_LOW)
247#define F_LONG_DELAY (F_SSU_DELAY | F_SYNC_DELAY)
248
249#define SDEBUG_MAX_PARTS 4
250
251#define SDEBUG_MAX_CMD_LEN 32
252
253#define SDEB_XA_NOT_IN_USE XA_MARK_1
254
255static struct kmem_cache *queued_cmd_cache;
256
257#define TO_QUEUED_CMD(scmd) ((void *)(scmd)->host_scribble)
258#define ASSIGN_QUEUED_CMD(scmnd, qc) { (scmnd)->host_scribble = (void *) qc; }
259
260/* Zone types (zbcr05 table 25) */
261enum sdebug_z_type {
262 ZBC_ZTYPE_CNV = 0x1,
263 ZBC_ZTYPE_SWR = 0x2,
264 ZBC_ZTYPE_SWP = 0x3,
265 /* ZBC_ZTYPE_SOBR = 0x4, */
266 ZBC_ZTYPE_GAP = 0x5,
267};
268
269/* enumeration names taken from table 26, zbcr05 */
270enum sdebug_z_cond {
271 ZBC_NOT_WRITE_POINTER = 0x0,
272 ZC1_EMPTY = 0x1,
273 ZC2_IMPLICIT_OPEN = 0x2,
274 ZC3_EXPLICIT_OPEN = 0x3,
275 ZC4_CLOSED = 0x4,
276 ZC6_READ_ONLY = 0xd,
277 ZC5_FULL = 0xe,
278 ZC7_OFFLINE = 0xf,
279};
280
281struct sdeb_zone_state { /* ZBC: per zone state */
282 enum sdebug_z_type z_type;
283 enum sdebug_z_cond z_cond;
284 bool z_non_seq_resource;
285 unsigned int z_size;
286 sector_t z_start;
287 sector_t z_wp;
288};
289
290enum sdebug_err_type {
291 ERR_TMOUT_CMD = 0, /* make specific scsi command timeout */
292 ERR_FAIL_QUEUE_CMD = 1, /* make specific scsi command's */
293 /* queuecmd return failed */
294 ERR_FAIL_CMD = 2, /* make specific scsi command's */
295 /* queuecmd return succeed but */
296 /* with errors set in scsi_cmnd */
297 ERR_ABORT_CMD_FAILED = 3, /* control return FAILED from */
298 /* scsi_debug_abort() */
299 ERR_LUN_RESET_FAILED = 4, /* control return FAILED from */
300 /* scsi_debug_device_reseLUN_RESET_FAILEDt() */
301};
302
303struct sdebug_err_inject {
304 int type;
305 struct list_head list;
306 int cnt;
307 unsigned char cmd;
308 struct rcu_head rcu;
309
310 union {
311 /*
312 * For ERR_FAIL_QUEUE_CMD
313 */
314 int queuecmd_ret;
315
316 /*
317 * For ERR_FAIL_CMD
318 */
319 struct {
320 unsigned char host_byte;
321 unsigned char driver_byte;
322 unsigned char status_byte;
323 unsigned char sense_key;
324 unsigned char asc;
325 unsigned char asq;
326 };
327 };
328};
329
330struct sdebug_dev_info {
331 struct list_head dev_list;
332 unsigned int channel;
333 unsigned int target;
334 u64 lun;
335 uuid_t lu_name;
336 struct sdebug_host_info *sdbg_host;
337 unsigned long uas_bm[1];
338 atomic_t stopped; /* 1: by SSU, 2: device start */
339 bool used;
340
341 /* For ZBC devices */
342 bool zoned;
343 unsigned int zcap;
344 unsigned int zsize;
345 unsigned int zsize_shift;
346 unsigned int nr_zones;
347 unsigned int nr_conv_zones;
348 unsigned int nr_seq_zones;
349 unsigned int nr_imp_open;
350 unsigned int nr_exp_open;
351 unsigned int nr_closed;
352 unsigned int max_open;
353 ktime_t create_ts; /* time since bootup that this device was created */
354 struct sdeb_zone_state *zstate;
355
356 struct dentry *debugfs_entry;
357 struct spinlock list_lock;
358 struct list_head inject_err_list;
359};
360
361struct sdebug_target_info {
362 bool reset_fail;
363 struct dentry *debugfs_entry;
364};
365
366struct sdebug_host_info {
367 struct list_head host_list;
368 int si_idx; /* sdeb_store_info (per host) xarray index */
369 struct Scsi_Host *shost;
370 struct device dev;
371 struct list_head dev_info_list;
372};
373
374/* There is an xarray of pointers to this struct's objects, one per host */
375struct sdeb_store_info {
376 rwlock_t macc_lck; /* for atomic media access on this store */
377 u8 *storep; /* user data storage (ram) */
378 struct t10_pi_tuple *dif_storep; /* protection info */
379 void *map_storep; /* provisioning map */
380};
381
382#define dev_to_sdebug_host(d) \
383 container_of(d, struct sdebug_host_info, dev)
384
385#define shost_to_sdebug_host(shost) \
386 dev_to_sdebug_host(shost->dma_dev)
387
388enum sdeb_defer_type {SDEB_DEFER_NONE = 0, SDEB_DEFER_HRT = 1,
389 SDEB_DEFER_WQ = 2, SDEB_DEFER_POLL = 3};
390
391struct sdebug_defer {
392 struct hrtimer hrt;
393 struct execute_work ew;
394 ktime_t cmpl_ts;/* time since boot to complete this cmd */
395 int issuing_cpu;
396 bool aborted; /* true when blk_abort_request() already called */
397 enum sdeb_defer_type defer_t;
398};
399
400struct sdebug_queued_cmd {
401 /* corresponding bit set in in_use_bm[] in owning struct sdebug_queue
402 * instance indicates this slot is in use.
403 */
404 struct sdebug_defer sd_dp;
405 struct scsi_cmnd *scmd;
406};
407
408struct sdebug_scsi_cmd {
409 spinlock_t lock;
410};
411
412static atomic_t sdebug_cmnd_count; /* number of incoming commands */
413static atomic_t sdebug_completions; /* count of deferred completions */
414static atomic_t sdebug_miss_cpus; /* submission + completion cpus differ */
415static atomic_t sdebug_a_tsf; /* 'almost task set full' counter */
416static atomic_t sdeb_inject_pending;
417static atomic_t sdeb_mq_poll_count; /* bumped when mq_poll returns > 0 */
418
419struct opcode_info_t {
420 u8 num_attached; /* 0 if this is it (i.e. a leaf); use 0xff */
421 /* for terminating element */
422 u8 opcode; /* if num_attached > 0, preferred */
423 u16 sa; /* service action */
424 u32 flags; /* OR-ed set of SDEB_F_* */
425 int (*pfp)(struct scsi_cmnd *, struct sdebug_dev_info *);
426 const struct opcode_info_t *arrp; /* num_attached elements or NULL */
427 u8 len_mask[16]; /* len_mask[0]-->cdb_len, then mask for cdb */
428 /* 1 to min(cdb_len, 15); ignore cdb[15...] */
429};
430
431/* SCSI opcodes (first byte of cdb) of interest mapped onto these indexes */
432enum sdeb_opcode_index {
433 SDEB_I_INVALID_OPCODE = 0,
434 SDEB_I_INQUIRY = 1,
435 SDEB_I_REPORT_LUNS = 2,
436 SDEB_I_REQUEST_SENSE = 3,
437 SDEB_I_TEST_UNIT_READY = 4,
438 SDEB_I_MODE_SENSE = 5, /* 6, 10 */
439 SDEB_I_MODE_SELECT = 6, /* 6, 10 */
440 SDEB_I_LOG_SENSE = 7,
441 SDEB_I_READ_CAPACITY = 8, /* 10; 16 is in SA_IN(16) */
442 SDEB_I_READ = 9, /* 6, 10, 12, 16 */
443 SDEB_I_WRITE = 10, /* 6, 10, 12, 16 */
444 SDEB_I_START_STOP = 11,
445 SDEB_I_SERV_ACT_IN_16 = 12, /* add ...SERV_ACT_IN_12 if needed */
446 SDEB_I_SERV_ACT_OUT_16 = 13, /* add ...SERV_ACT_OUT_12 if needed */
447 SDEB_I_MAINT_IN = 14,
448 SDEB_I_MAINT_OUT = 15,
449 SDEB_I_VERIFY = 16, /* VERIFY(10), VERIFY(16) */
450 SDEB_I_VARIABLE_LEN = 17, /* READ(32), WRITE(32), WR_SCAT(32) */
451 SDEB_I_RESERVE = 18, /* 6, 10 */
452 SDEB_I_RELEASE = 19, /* 6, 10 */
453 SDEB_I_ALLOW_REMOVAL = 20, /* PREVENT ALLOW MEDIUM REMOVAL */
454 SDEB_I_REZERO_UNIT = 21, /* REWIND in SSC */
455 SDEB_I_ATA_PT = 22, /* 12, 16 */
456 SDEB_I_SEND_DIAG = 23,
457 SDEB_I_UNMAP = 24,
458 SDEB_I_WRITE_BUFFER = 25,
459 SDEB_I_WRITE_SAME = 26, /* 10, 16 */
460 SDEB_I_SYNC_CACHE = 27, /* 10, 16 */
461 SDEB_I_COMP_WRITE = 28,
462 SDEB_I_PRE_FETCH = 29, /* 10, 16 */
463 SDEB_I_ZONE_OUT = 30, /* 0x94+SA; includes no data xfer */
464 SDEB_I_ZONE_IN = 31, /* 0x95+SA; all have data-in */
465 SDEB_I_LAST_ELEM_P1 = 32, /* keep this last (previous + 1) */
466};
467
468
469static const unsigned char opcode_ind_arr[256] = {
470/* 0x0; 0x0->0x1f: 6 byte cdbs */
471 SDEB_I_TEST_UNIT_READY, SDEB_I_REZERO_UNIT, 0, SDEB_I_REQUEST_SENSE,
472 0, 0, 0, 0,
473 SDEB_I_READ, 0, SDEB_I_WRITE, 0, 0, 0, 0, 0,
474 0, 0, SDEB_I_INQUIRY, 0, 0, SDEB_I_MODE_SELECT, SDEB_I_RESERVE,
475 SDEB_I_RELEASE,
476 0, 0, SDEB_I_MODE_SENSE, SDEB_I_START_STOP, 0, SDEB_I_SEND_DIAG,
477 SDEB_I_ALLOW_REMOVAL, 0,
478/* 0x20; 0x20->0x3f: 10 byte cdbs */
479 0, 0, 0, 0, 0, SDEB_I_READ_CAPACITY, 0, 0,
480 SDEB_I_READ, 0, SDEB_I_WRITE, 0, 0, 0, 0, SDEB_I_VERIFY,
481 0, 0, 0, 0, SDEB_I_PRE_FETCH, SDEB_I_SYNC_CACHE, 0, 0,
482 0, 0, 0, SDEB_I_WRITE_BUFFER, 0, 0, 0, 0,
483/* 0x40; 0x40->0x5f: 10 byte cdbs */
484 0, SDEB_I_WRITE_SAME, SDEB_I_UNMAP, 0, 0, 0, 0, 0,
485 0, 0, 0, 0, 0, SDEB_I_LOG_SENSE, 0, 0,
486 0, 0, 0, 0, 0, SDEB_I_MODE_SELECT, SDEB_I_RESERVE,
487 SDEB_I_RELEASE,
488 0, 0, SDEB_I_MODE_SENSE, 0, 0, 0, 0, 0,
489/* 0x60; 0x60->0x7d are reserved, 0x7e is "extended cdb" */
490 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
491 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
492 0, SDEB_I_VARIABLE_LEN,
493/* 0x80; 0x80->0x9f: 16 byte cdbs */
494 0, 0, 0, 0, 0, SDEB_I_ATA_PT, 0, 0,
495 SDEB_I_READ, SDEB_I_COMP_WRITE, SDEB_I_WRITE, 0,
496 0, 0, 0, SDEB_I_VERIFY,
497 SDEB_I_PRE_FETCH, SDEB_I_SYNC_CACHE, 0, SDEB_I_WRITE_SAME,
498 SDEB_I_ZONE_OUT, SDEB_I_ZONE_IN, 0, 0,
499 0, 0, 0, 0, 0, 0, SDEB_I_SERV_ACT_IN_16, SDEB_I_SERV_ACT_OUT_16,
500/* 0xa0; 0xa0->0xbf: 12 byte cdbs */
501 SDEB_I_REPORT_LUNS, SDEB_I_ATA_PT, 0, SDEB_I_MAINT_IN,
502 SDEB_I_MAINT_OUT, 0, 0, 0,
503 SDEB_I_READ, 0 /* SDEB_I_SERV_ACT_OUT_12 */, SDEB_I_WRITE,
504 0 /* SDEB_I_SERV_ACT_IN_12 */, 0, 0, 0, 0,
505 0, 0, 0, 0, 0, 0, 0, 0,
506 0, 0, 0, 0, 0, 0, 0, 0,
507/* 0xc0; 0xc0->0xff: vendor specific */
508 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
509 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
510 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
511 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
512};
513
514/*
515 * The following "response" functions return the SCSI mid-level's 4 byte
516 * tuple-in-an-int. To handle commands with an IMMED bit, for a faster
517 * command completion, they can mask their return value with
518 * SDEG_RES_IMMED_MASK .
519 */
520#define SDEG_RES_IMMED_MASK 0x40000000
521
522static int resp_inquiry(struct scsi_cmnd *, struct sdebug_dev_info *);
523static int resp_report_luns(struct scsi_cmnd *, struct sdebug_dev_info *);
524static int resp_requests(struct scsi_cmnd *, struct sdebug_dev_info *);
525static int resp_mode_sense(struct scsi_cmnd *, struct sdebug_dev_info *);
526static int resp_mode_select(struct scsi_cmnd *, struct sdebug_dev_info *);
527static int resp_log_sense(struct scsi_cmnd *, struct sdebug_dev_info *);
528static int resp_readcap(struct scsi_cmnd *, struct sdebug_dev_info *);
529static int resp_read_dt0(struct scsi_cmnd *, struct sdebug_dev_info *);
530static int resp_write_dt0(struct scsi_cmnd *, struct sdebug_dev_info *);
531static int resp_write_scat(struct scsi_cmnd *, struct sdebug_dev_info *);
532static int resp_start_stop(struct scsi_cmnd *, struct sdebug_dev_info *);
533static int resp_readcap16(struct scsi_cmnd *, struct sdebug_dev_info *);
534static int resp_get_lba_status(struct scsi_cmnd *, struct sdebug_dev_info *);
535static int resp_report_tgtpgs(struct scsi_cmnd *, struct sdebug_dev_info *);
536static int resp_unmap(struct scsi_cmnd *, struct sdebug_dev_info *);
537static int resp_rsup_opcodes(struct scsi_cmnd *, struct sdebug_dev_info *);
538static int resp_rsup_tmfs(struct scsi_cmnd *, struct sdebug_dev_info *);
539static int resp_verify(struct scsi_cmnd *, struct sdebug_dev_info *);
540static int resp_write_same_10(struct scsi_cmnd *, struct sdebug_dev_info *);
541static int resp_write_same_16(struct scsi_cmnd *, struct sdebug_dev_info *);
542static int resp_comp_write(struct scsi_cmnd *, struct sdebug_dev_info *);
543static int resp_write_buffer(struct scsi_cmnd *, struct sdebug_dev_info *);
544static int resp_sync_cache(struct scsi_cmnd *, struct sdebug_dev_info *);
545static int resp_pre_fetch(struct scsi_cmnd *, struct sdebug_dev_info *);
546static int resp_report_zones(struct scsi_cmnd *, struct sdebug_dev_info *);
547static int resp_open_zone(struct scsi_cmnd *, struct sdebug_dev_info *);
548static int resp_close_zone(struct scsi_cmnd *, struct sdebug_dev_info *);
549static int resp_finish_zone(struct scsi_cmnd *, struct sdebug_dev_info *);
550static int resp_rwp_zone(struct scsi_cmnd *, struct sdebug_dev_info *);
551
552static int sdebug_do_add_host(bool mk_new_store);
553static int sdebug_add_host_helper(int per_host_idx);
554static void sdebug_do_remove_host(bool the_end);
555static int sdebug_add_store(void);
556static void sdebug_erase_store(int idx, struct sdeb_store_info *sip);
557static void sdebug_erase_all_stores(bool apart_from_first);
558
559static void sdebug_free_queued_cmd(struct sdebug_queued_cmd *sqcp);
560
561/*
562 * The following are overflow arrays for cdbs that "hit" the same index in
563 * the opcode_info_arr array. The most time sensitive (or commonly used) cdb
564 * should be placed in opcode_info_arr[], the others should be placed here.
565 */
566static const struct opcode_info_t msense_iarr[] = {
567 {0, 0x1a, 0, F_D_IN, NULL, NULL,
568 {6, 0xe8, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
569};
570
571static const struct opcode_info_t mselect_iarr[] = {
572 {0, 0x15, 0, F_D_OUT, NULL, NULL,
573 {6, 0xf1, 0, 0, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
574};
575
576static const struct opcode_info_t read_iarr[] = {
577 {0, 0x28, 0, F_D_IN | FF_MEDIA_IO, resp_read_dt0, NULL,/* READ(10) */
578 {10, 0xff, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xff, 0xff, 0xc7, 0, 0,
579 0, 0, 0, 0} },
580 {0, 0x8, 0, F_D_IN | FF_MEDIA_IO, resp_read_dt0, NULL, /* READ(6) */
581 {6, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
582 {0, 0xa8, 0, F_D_IN | FF_MEDIA_IO, resp_read_dt0, NULL,/* READ(12) */
583 {12, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xbf,
584 0xc7, 0, 0, 0, 0} },
585};
586
587static const struct opcode_info_t write_iarr[] = {
588 {0, 0x2a, 0, F_D_OUT | FF_MEDIA_IO, resp_write_dt0, /* WRITE(10) */
589 NULL, {10, 0xfb, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xff, 0xff, 0xc7,
590 0, 0, 0, 0, 0, 0} },
591 {0, 0xa, 0, F_D_OUT | FF_MEDIA_IO, resp_write_dt0, /* WRITE(6) */
592 NULL, {6, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0,
593 0, 0, 0} },
594 {0, 0xaa, 0, F_D_OUT | FF_MEDIA_IO, resp_write_dt0, /* WRITE(12) */
595 NULL, {12, 0xfb, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
596 0xbf, 0xc7, 0, 0, 0, 0} },
597};
598
599static const struct opcode_info_t verify_iarr[] = {
600 {0, 0x2f, 0, F_D_OUT_MAYBE | FF_MEDIA_IO, resp_verify,/* VERIFY(10) */
601 NULL, {10, 0xf7, 0xff, 0xff, 0xff, 0xff, 0xbf, 0xff, 0xff, 0xc7,
602 0, 0, 0, 0, 0, 0} },
603};
604
605static const struct opcode_info_t sa_in_16_iarr[] = {
606 {0, 0x9e, 0x12, F_SA_LOW | F_D_IN, resp_get_lba_status, NULL,
607 {16, 0x12, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
608 0xff, 0xff, 0xff, 0, 0xc7} }, /* GET LBA STATUS(16) */
609};
610
611static const struct opcode_info_t vl_iarr[] = { /* VARIABLE LENGTH */
612 {0, 0x7f, 0xb, F_SA_HIGH | F_D_OUT | FF_MEDIA_IO, resp_write_dt0,
613 NULL, {32, 0xc7, 0, 0, 0, 0, 0x3f, 0x18, 0x0, 0xb, 0xfa,
614 0, 0xff, 0xff, 0xff, 0xff} }, /* WRITE(32) */
615 {0, 0x7f, 0x11, F_SA_HIGH | F_D_OUT | FF_MEDIA_IO, resp_write_scat,
616 NULL, {32, 0xc7, 0, 0, 0, 0, 0x3f, 0x18, 0x0, 0x11, 0xf8,
617 0, 0xff, 0xff, 0x0, 0x0} }, /* WRITE SCATTERED(32) */
618};
619
620static const struct opcode_info_t maint_in_iarr[] = { /* MAINT IN */
621 {0, 0xa3, 0xc, F_SA_LOW | F_D_IN, resp_rsup_opcodes, NULL,
622 {12, 0xc, 0x87, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0,
623 0xc7, 0, 0, 0, 0} }, /* REPORT SUPPORTED OPERATION CODES */
624 {0, 0xa3, 0xd, F_SA_LOW | F_D_IN, resp_rsup_tmfs, NULL,
625 {12, 0xd, 0x80, 0, 0, 0, 0xff, 0xff, 0xff, 0xff, 0, 0xc7, 0, 0,
626 0, 0} }, /* REPORTED SUPPORTED TASK MANAGEMENT FUNCTIONS */
627};
628
629static const struct opcode_info_t write_same_iarr[] = {
630 {0, 0x93, 0, F_D_OUT_MAYBE | FF_MEDIA_IO, resp_write_same_16, NULL,
631 {16, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
632 0xff, 0xff, 0xff, 0x3f, 0xc7} }, /* WRITE SAME(16) */
633};
634
635static const struct opcode_info_t reserve_iarr[] = {
636 {0, 0x16, 0, F_D_OUT, NULL, NULL, /* RESERVE(6) */
637 {6, 0x1f, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
638};
639
640static const struct opcode_info_t release_iarr[] = {
641 {0, 0x17, 0, F_D_OUT, NULL, NULL, /* RELEASE(6) */
642 {6, 0x1f, 0xff, 0, 0, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
643};
644
645static const struct opcode_info_t sync_cache_iarr[] = {
646 {0, 0x91, 0, F_SYNC_DELAY | F_M_ACCESS, resp_sync_cache, NULL,
647 {16, 0x6, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
648 0xff, 0xff, 0xff, 0xff, 0x3f, 0xc7} }, /* SYNC_CACHE (16) */
649};
650
651static const struct opcode_info_t pre_fetch_iarr[] = {
652 {0, 0x90, 0, F_SYNC_DELAY | FF_MEDIA_IO, resp_pre_fetch, NULL,
653 {16, 0x2, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
654 0xff, 0xff, 0xff, 0xff, 0x3f, 0xc7} }, /* PRE-FETCH (16) */
655};
656
657static const struct opcode_info_t zone_out_iarr[] = { /* ZONE OUT(16) */
658 {0, 0x94, 0x1, F_SA_LOW | F_M_ACCESS, resp_close_zone, NULL,
659 {16, 0x1, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
660 0xff, 0, 0, 0xff, 0xff, 0x1, 0xc7} }, /* CLOSE ZONE */
661 {0, 0x94, 0x2, F_SA_LOW | F_M_ACCESS, resp_finish_zone, NULL,
662 {16, 0x2, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
663 0xff, 0, 0, 0xff, 0xff, 0x1, 0xc7} }, /* FINISH ZONE */
664 {0, 0x94, 0x4, F_SA_LOW | F_M_ACCESS, resp_rwp_zone, NULL,
665 {16, 0x4, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
666 0xff, 0, 0, 0xff, 0xff, 0x1, 0xc7} }, /* RESET WRITE POINTER */
667};
668
669static const struct opcode_info_t zone_in_iarr[] = { /* ZONE IN(16) */
670 {0, 0x95, 0x6, F_SA_LOW | F_D_IN | F_M_ACCESS, NULL, NULL,
671 {16, 0x6, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
672 0xff, 0xff, 0xff, 0xff, 0x3f, 0xc7} }, /* REPORT ZONES */
673};
674
675
676/* This array is accessed via SDEB_I_* values. Make sure all are mapped,
677 * plus the terminating elements for logic that scans this table such as
678 * REPORT SUPPORTED OPERATION CODES. */
679static const struct opcode_info_t opcode_info_arr[SDEB_I_LAST_ELEM_P1 + 1] = {
680/* 0 */
681 {0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL, /* unknown opcodes */
682 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
683 {0, 0x12, 0, FF_RESPOND | F_D_IN, resp_inquiry, NULL, /* INQUIRY */
684 {6, 0xe3, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
685 {0, 0xa0, 0, FF_RESPOND | F_D_IN, resp_report_luns, NULL,
686 {12, 0xe3, 0xff, 0, 0, 0, 0xff, 0xff, 0xff, 0xff, 0, 0xc7, 0, 0,
687 0, 0} }, /* REPORT LUNS */
688 {0, 0x3, 0, FF_RESPOND | F_D_IN, resp_requests, NULL,
689 {6, 0xe1, 0, 0, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
690 {0, 0x0, 0, F_M_ACCESS | F_RL_WLUN_OK, NULL, NULL,/* TEST UNIT READY */
691 {6, 0, 0, 0, 0, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
692/* 5 */
693 {ARRAY_SIZE(msense_iarr), 0x5a, 0, F_D_IN, /* MODE SENSE(10) */
694 resp_mode_sense, msense_iarr, {10, 0xf8, 0xff, 0xff, 0, 0, 0,
695 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0} },
696 {ARRAY_SIZE(mselect_iarr), 0x55, 0, F_D_OUT, /* MODE SELECT(10) */
697 resp_mode_select, mselect_iarr, {10, 0xf1, 0, 0, 0, 0, 0, 0xff,
698 0xff, 0xc7, 0, 0, 0, 0, 0, 0} },
699 {0, 0x4d, 0, F_D_IN, resp_log_sense, NULL, /* LOG SENSE */
700 {10, 0xe3, 0xff, 0xff, 0, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0,
701 0, 0, 0} },
702 {0, 0x25, 0, F_D_IN, resp_readcap, NULL, /* READ CAPACITY(10) */
703 {10, 0xe1, 0xff, 0xff, 0xff, 0xff, 0, 0, 0x1, 0xc7, 0, 0, 0, 0,
704 0, 0} },
705 {ARRAY_SIZE(read_iarr), 0x88, 0, F_D_IN | FF_MEDIA_IO, /* READ(16) */
706 resp_read_dt0, read_iarr, {16, 0xfe, 0xff, 0xff, 0xff, 0xff,
707 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc7} },
708/* 10 */
709 {ARRAY_SIZE(write_iarr), 0x8a, 0, F_D_OUT | FF_MEDIA_IO,
710 resp_write_dt0, write_iarr, /* WRITE(16) */
711 {16, 0xfa, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
712 0xff, 0xff, 0xff, 0xff, 0xff, 0xc7} },
713 {0, 0x1b, 0, F_SSU_DELAY, resp_start_stop, NULL,/* START STOP UNIT */
714 {6, 0x1, 0, 0xf, 0xf7, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
715 {ARRAY_SIZE(sa_in_16_iarr), 0x9e, 0x10, F_SA_LOW | F_D_IN,
716 resp_readcap16, sa_in_16_iarr, /* SA_IN(16), READ CAPACITY(16) */
717 {16, 0x10, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
718 0xff, 0xff, 0xff, 0xff, 0x1, 0xc7} },
719 {0, 0x9f, 0x12, F_SA_LOW | F_D_OUT | FF_MEDIA_IO, resp_write_scat,
720 NULL, {16, 0x12, 0xf9, 0x0, 0xff, 0xff, 0, 0, 0xff, 0xff, 0xff,
721 0xff, 0xff, 0xff, 0xff, 0xc7} }, /* SA_OUT(16), WRITE SCAT(16) */
722 {ARRAY_SIZE(maint_in_iarr), 0xa3, 0xa, F_SA_LOW | F_D_IN,
723 resp_report_tgtpgs, /* MAINT IN, REPORT TARGET PORT GROUPS */
724 maint_in_iarr, {12, 0xea, 0, 0, 0, 0, 0xff, 0xff, 0xff,
725 0xff, 0, 0xc7, 0, 0, 0, 0} },
726/* 15 */
727 {0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL, /* MAINT OUT */
728 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
729 {ARRAY_SIZE(verify_iarr), 0x8f, 0,
730 F_D_OUT_MAYBE | FF_MEDIA_IO, resp_verify, /* VERIFY(16) */
731 verify_iarr, {16, 0xf6, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
732 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xc7} },
733 {ARRAY_SIZE(vl_iarr), 0x7f, 0x9, F_SA_HIGH | F_D_IN | FF_MEDIA_IO,
734 resp_read_dt0, vl_iarr, /* VARIABLE LENGTH, READ(32) */
735 {32, 0xc7, 0, 0, 0, 0, 0x3f, 0x18, 0x0, 0x9, 0xfe, 0, 0xff, 0xff,
736 0xff, 0xff} },
737 {ARRAY_SIZE(reserve_iarr), 0x56, 0, F_D_OUT,
738 NULL, reserve_iarr, /* RESERVE(10) <no response function> */
739 {10, 0xff, 0xff, 0xff, 0, 0, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0,
740 0} },
741 {ARRAY_SIZE(release_iarr), 0x57, 0, F_D_OUT,
742 NULL, release_iarr, /* RELEASE(10) <no response function> */
743 {10, 0x13, 0xff, 0xff, 0, 0, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0,
744 0} },
745/* 20 */
746 {0, 0x1e, 0, 0, NULL, NULL, /* ALLOW REMOVAL */
747 {6, 0, 0, 0, 0x3, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
748 {0, 0x1, 0, 0, resp_start_stop, NULL, /* REWIND ?? */
749 {6, 0x1, 0, 0, 0, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
750 {0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL, /* ATA_PT */
751 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
752 {0, 0x1d, F_D_OUT, 0, NULL, NULL, /* SEND DIAGNOSTIC */
753 {6, 0xf7, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
754 {0, 0x42, 0, F_D_OUT | FF_MEDIA_IO, resp_unmap, NULL, /* UNMAP */
755 {10, 0x1, 0, 0, 0, 0, 0x3f, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0} },
756/* 25 */
757 {0, 0x3b, 0, F_D_OUT_MAYBE, resp_write_buffer, NULL,
758 {10, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0,
759 0, 0, 0, 0} }, /* WRITE_BUFFER */
760 {ARRAY_SIZE(write_same_iarr), 0x41, 0, F_D_OUT_MAYBE | FF_MEDIA_IO,
761 resp_write_same_10, write_same_iarr, /* WRITE SAME(10) */
762 {10, 0xff, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xff, 0xff, 0xc7, 0,
763 0, 0, 0, 0, 0} },
764 {ARRAY_SIZE(sync_cache_iarr), 0x35, 0, F_SYNC_DELAY | F_M_ACCESS,
765 resp_sync_cache, sync_cache_iarr,
766 {10, 0x7, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xff, 0xff, 0xc7, 0, 0,
767 0, 0, 0, 0} }, /* SYNC_CACHE (10) */
768 {0, 0x89, 0, F_D_OUT | FF_MEDIA_IO, resp_comp_write, NULL,
769 {16, 0xf8, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0, 0,
770 0, 0xff, 0x3f, 0xc7} }, /* COMPARE AND WRITE */
771 {ARRAY_SIZE(pre_fetch_iarr), 0x34, 0, F_SYNC_DELAY | FF_MEDIA_IO,
772 resp_pre_fetch, pre_fetch_iarr,
773 {10, 0x2, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xff, 0xff, 0xc7, 0, 0,
774 0, 0, 0, 0} }, /* PRE-FETCH (10) */
775
776/* 30 */
777 {ARRAY_SIZE(zone_out_iarr), 0x94, 0x3, F_SA_LOW | F_M_ACCESS,
778 resp_open_zone, zone_out_iarr, /* ZONE_OUT(16), OPEN ZONE) */
779 {16, 0x3 /* SA */, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
780 0xff, 0xff, 0x0, 0x0, 0xff, 0xff, 0x1, 0xc7} },
781 {ARRAY_SIZE(zone_in_iarr), 0x95, 0x0, F_SA_LOW | F_M_ACCESS,
782 resp_report_zones, zone_in_iarr, /* ZONE_IN(16), REPORT ZONES) */
783 {16, 0x0 /* SA */, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
784 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xbf, 0xc7} },
785/* sentinel */
786 {0xff, 0, 0, 0, NULL, NULL, /* terminating element */
787 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
788};
789
790static int sdebug_num_hosts;
791static int sdebug_add_host = DEF_NUM_HOST; /* in sysfs this is relative */
792static int sdebug_ato = DEF_ATO;
793static int sdebug_cdb_len = DEF_CDB_LEN;
794static int sdebug_jdelay = DEF_JDELAY; /* if > 0 then unit is jiffies */
795static int sdebug_dev_size_mb = DEF_DEV_SIZE_PRE_INIT;
796static int sdebug_dif = DEF_DIF;
797static int sdebug_dix = DEF_DIX;
798static int sdebug_dsense = DEF_D_SENSE;
799static int sdebug_every_nth = DEF_EVERY_NTH;
800static int sdebug_fake_rw = DEF_FAKE_RW;
801static unsigned int sdebug_guard = DEF_GUARD;
802static int sdebug_host_max_queue; /* per host */
803static int sdebug_lowest_aligned = DEF_LOWEST_ALIGNED;
804static int sdebug_max_luns = DEF_MAX_LUNS;
805static int sdebug_max_queue = SDEBUG_CANQUEUE; /* per submit queue */
806static unsigned int sdebug_medium_error_start = OPT_MEDIUM_ERR_ADDR;
807static int sdebug_medium_error_count = OPT_MEDIUM_ERR_NUM;
808static int sdebug_ndelay = DEF_NDELAY; /* if > 0 then unit is nanoseconds */
809static int sdebug_no_lun_0 = DEF_NO_LUN_0;
810static int sdebug_no_uld;
811static int sdebug_num_parts = DEF_NUM_PARTS;
812static int sdebug_num_tgts = DEF_NUM_TGTS; /* targets per host */
813static int sdebug_opt_blks = DEF_OPT_BLKS;
814static int sdebug_opts = DEF_OPTS;
815static int sdebug_physblk_exp = DEF_PHYSBLK_EXP;
816static int sdebug_opt_xferlen_exp = DEF_OPT_XFERLEN_EXP;
817static int sdebug_ptype = DEF_PTYPE; /* SCSI peripheral device type */
818static int sdebug_scsi_level = DEF_SCSI_LEVEL;
819static int sdebug_sector_size = DEF_SECTOR_SIZE;
820static int sdeb_tur_ms_to_ready = DEF_TUR_MS_TO_READY;
821static int sdebug_virtual_gb = DEF_VIRTUAL_GB;
822static int sdebug_vpd_use_hostno = DEF_VPD_USE_HOSTNO;
823static unsigned int sdebug_lbpu = DEF_LBPU;
824static unsigned int sdebug_lbpws = DEF_LBPWS;
825static unsigned int sdebug_lbpws10 = DEF_LBPWS10;
826static unsigned int sdebug_lbprz = DEF_LBPRZ;
827static unsigned int sdebug_unmap_alignment = DEF_UNMAP_ALIGNMENT;
828static unsigned int sdebug_unmap_granularity = DEF_UNMAP_GRANULARITY;
829static unsigned int sdebug_unmap_max_blocks = DEF_UNMAP_MAX_BLOCKS;
830static unsigned int sdebug_unmap_max_desc = DEF_UNMAP_MAX_DESC;
831static unsigned int sdebug_write_same_length = DEF_WRITESAME_LENGTH;
832static int sdebug_uuid_ctl = DEF_UUID_CTL;
833static bool sdebug_random = DEF_RANDOM;
834static bool sdebug_per_host_store = DEF_PER_HOST_STORE;
835static bool sdebug_removable = DEF_REMOVABLE;
836static bool sdebug_clustering;
837static bool sdebug_host_lock = DEF_HOST_LOCK;
838static bool sdebug_strict = DEF_STRICT;
839static bool sdebug_any_injecting_opt;
840static bool sdebug_no_rwlock;
841static bool sdebug_verbose;
842static bool have_dif_prot;
843static bool write_since_sync;
844static bool sdebug_statistics = DEF_STATISTICS;
845static bool sdebug_wp;
846static bool sdebug_allow_restart;
847static enum {
848 BLK_ZONED_NONE = 0,
849 BLK_ZONED_HA = 1,
850 BLK_ZONED_HM = 2,
851} sdeb_zbc_model = BLK_ZONED_NONE;
852static char *sdeb_zbc_model_s;
853
854enum sam_lun_addr_method {SAM_LUN_AM_PERIPHERAL = 0x0,
855 SAM_LUN_AM_FLAT = 0x1,
856 SAM_LUN_AM_LOGICAL_UNIT = 0x2,
857 SAM_LUN_AM_EXTENDED = 0x3};
858static enum sam_lun_addr_method sdebug_lun_am = SAM_LUN_AM_PERIPHERAL;
859static int sdebug_lun_am_i = (int)SAM_LUN_AM_PERIPHERAL;
860
861static unsigned int sdebug_store_sectors;
862static sector_t sdebug_capacity; /* in sectors */
863
864/* old BIOS stuff, kernel may get rid of them but some mode sense pages
865 may still need them */
866static int sdebug_heads; /* heads per disk */
867static int sdebug_cylinders_per; /* cylinders per surface */
868static int sdebug_sectors_per; /* sectors per cylinder */
869
870static LIST_HEAD(sdebug_host_list);
871static DEFINE_MUTEX(sdebug_host_list_mutex);
872
873static struct xarray per_store_arr;
874static struct xarray *per_store_ap = &per_store_arr;
875static int sdeb_first_idx = -1; /* invalid index ==> none created */
876static int sdeb_most_recent_idx = -1;
877static DEFINE_RWLOCK(sdeb_fake_rw_lck); /* need a RW lock when fake_rw=1 */
878
879static unsigned long map_size;
880static int num_aborts;
881static int num_dev_resets;
882static int num_target_resets;
883static int num_bus_resets;
884static int num_host_resets;
885static int dix_writes;
886static int dix_reads;
887static int dif_errors;
888
889/* ZBC global data */
890static bool sdeb_zbc_in_use; /* true for host-aware and host-managed disks */
891static int sdeb_zbc_zone_cap_mb;
892static int sdeb_zbc_zone_size_mb;
893static int sdeb_zbc_max_open = DEF_ZBC_MAX_OPEN_ZONES;
894static int sdeb_zbc_nr_conv = DEF_ZBC_NR_CONV_ZONES;
895
896static int submit_queues = DEF_SUBMIT_QUEUES; /* > 1 for multi-queue (mq) */
897static int poll_queues; /* iouring iopoll interface.*/
898
899static char sdebug_proc_name[] = MY_NAME;
900static const char *my_name = MY_NAME;
901
902static struct bus_type pseudo_lld_bus;
903
904static struct device_driver sdebug_driverfs_driver = {
905 .name = sdebug_proc_name,
906 .bus = &pseudo_lld_bus,
907};
908
909static const int check_condition_result =
910 SAM_STAT_CHECK_CONDITION;
911
912static const int illegal_condition_result =
913 (DID_ABORT << 16) | SAM_STAT_CHECK_CONDITION;
914
915static const int device_qfull_result =
916 (DID_ABORT << 16) | SAM_STAT_TASK_SET_FULL;
917
918static const int condition_met_result = SAM_STAT_CONDITION_MET;
919
920static struct dentry *sdebug_debugfs_root;
921
922static void sdebug_err_free(struct rcu_head *head)
923{
924 struct sdebug_err_inject *inject =
925 container_of(head, typeof(*inject), rcu);
926
927 kfree(inject);
928}
929
930static void sdebug_err_add(struct scsi_device *sdev, struct sdebug_err_inject *new)
931{
932 struct sdebug_dev_info *devip = (struct sdebug_dev_info *)sdev->hostdata;
933 struct sdebug_err_inject *err;
934
935 spin_lock(&devip->list_lock);
936 list_for_each_entry_rcu(err, &devip->inject_err_list, list) {
937 if (err->type == new->type && err->cmd == new->cmd) {
938 list_del_rcu(&err->list);
939 call_rcu(&err->rcu, sdebug_err_free);
940 }
941 }
942
943 list_add_tail_rcu(&new->list, &devip->inject_err_list);
944 spin_unlock(&devip->list_lock);
945}
946
947static int sdebug_err_remove(struct scsi_device *sdev, const char *buf, size_t count)
948{
949 struct sdebug_dev_info *devip = (struct sdebug_dev_info *)sdev->hostdata;
950 struct sdebug_err_inject *err;
951 int type;
952 unsigned char cmd;
953
954 if (sscanf(buf, "- %d %hhx", &type, &cmd) != 2) {
955 kfree(buf);
956 return -EINVAL;
957 }
958
959 spin_lock(&devip->list_lock);
960 list_for_each_entry_rcu(err, &devip->inject_err_list, list) {
961 if (err->type == type && err->cmd == cmd) {
962 list_del_rcu(&err->list);
963 call_rcu(&err->rcu, sdebug_err_free);
964 spin_unlock(&devip->list_lock);
965 kfree(buf);
966 return count;
967 }
968 }
969 spin_unlock(&devip->list_lock);
970
971 kfree(buf);
972 return -EINVAL;
973}
974
975static int sdebug_error_show(struct seq_file *m, void *p)
976{
977 struct scsi_device *sdev = (struct scsi_device *)m->private;
978 struct sdebug_dev_info *devip = (struct sdebug_dev_info *)sdev->hostdata;
979 struct sdebug_err_inject *err;
980
981 seq_puts(m, "Type\tCount\tCommand\n");
982
983 rcu_read_lock();
984 list_for_each_entry_rcu(err, &devip->inject_err_list, list) {
985 switch (err->type) {
986 case ERR_TMOUT_CMD:
987 case ERR_ABORT_CMD_FAILED:
988 case ERR_LUN_RESET_FAILED:
989 seq_printf(m, "%d\t%d\t0x%x\n", err->type, err->cnt,
990 err->cmd);
991 break;
992
993 case ERR_FAIL_QUEUE_CMD:
994 seq_printf(m, "%d\t%d\t0x%x\t0x%x\n", err->type,
995 err->cnt, err->cmd, err->queuecmd_ret);
996 break;
997
998 case ERR_FAIL_CMD:
999 seq_printf(m, "%d\t%d\t0x%x\t0x%x 0x%x 0x%x 0x%x 0x%x 0x%x\n",
1000 err->type, err->cnt, err->cmd,
1001 err->host_byte, err->driver_byte,
1002 err->status_byte, err->sense_key,
1003 err->asc, err->asq);
1004 break;
1005 }
1006 }
1007 rcu_read_unlock();
1008
1009 return 0;
1010}
1011
1012static int sdebug_error_open(struct inode *inode, struct file *file)
1013{
1014 return single_open(file, sdebug_error_show, inode->i_private);
1015}
1016
1017static ssize_t sdebug_error_write(struct file *file, const char __user *ubuf,
1018 size_t count, loff_t *ppos)
1019{
1020 char *buf;
1021 unsigned int inject_type;
1022 struct sdebug_err_inject *inject;
1023 struct scsi_device *sdev = (struct scsi_device *)file->f_inode->i_private;
1024
1025 buf = kzalloc(count + 1, GFP_KERNEL);
1026 if (!buf)
1027 return -ENOMEM;
1028
1029 if (copy_from_user(buf, ubuf, count)) {
1030 kfree(buf);
1031 return -EFAULT;
1032 }
1033
1034 if (buf[0] == '-')
1035 return sdebug_err_remove(sdev, buf, count);
1036
1037 if (sscanf(buf, "%d", &inject_type) != 1) {
1038 kfree(buf);
1039 return -EINVAL;
1040 }
1041
1042 inject = kzalloc(sizeof(struct sdebug_err_inject), GFP_KERNEL);
1043 if (!inject) {
1044 kfree(buf);
1045 return -ENOMEM;
1046 }
1047
1048 switch (inject_type) {
1049 case ERR_TMOUT_CMD:
1050 case ERR_ABORT_CMD_FAILED:
1051 case ERR_LUN_RESET_FAILED:
1052 if (sscanf(buf, "%d %d %hhx", &inject->type, &inject->cnt,
1053 &inject->cmd) != 3)
1054 goto out_error;
1055 break;
1056
1057 case ERR_FAIL_QUEUE_CMD:
1058 if (sscanf(buf, "%d %d %hhx %x", &inject->type, &inject->cnt,
1059 &inject->cmd, &inject->queuecmd_ret) != 4)
1060 goto out_error;
1061 break;
1062
1063 case ERR_FAIL_CMD:
1064 if (sscanf(buf, "%d %d %hhx %hhx %hhx %hhx %hhx %hhx %hhx",
1065 &inject->type, &inject->cnt, &inject->cmd,
1066 &inject->host_byte, &inject->driver_byte,
1067 &inject->status_byte, &inject->sense_key,
1068 &inject->asc, &inject->asq) != 9)
1069 goto out_error;
1070 break;
1071
1072 default:
1073 goto out_error;
1074 break;
1075 }
1076
1077 kfree(buf);
1078 sdebug_err_add(sdev, inject);
1079
1080 return count;
1081
1082out_error:
1083 kfree(buf);
1084 kfree(inject);
1085 return -EINVAL;
1086}
1087
1088static const struct file_operations sdebug_error_fops = {
1089 .open = sdebug_error_open,
1090 .read = seq_read,
1091 .write = sdebug_error_write,
1092 .release = single_release,
1093};
1094
1095static int sdebug_target_reset_fail_show(struct seq_file *m, void *p)
1096{
1097 struct scsi_target *starget = (struct scsi_target *)m->private;
1098 struct sdebug_target_info *targetip =
1099 (struct sdebug_target_info *)starget->hostdata;
1100
1101 if (targetip)
1102 seq_printf(m, "%c\n", targetip->reset_fail ? 'Y' : 'N');
1103
1104 return 0;
1105}
1106
1107static int sdebug_target_reset_fail_open(struct inode *inode, struct file *file)
1108{
1109 return single_open(file, sdebug_target_reset_fail_show, inode->i_private);
1110}
1111
1112static ssize_t sdebug_target_reset_fail_write(struct file *file,
1113 const char __user *ubuf, size_t count, loff_t *ppos)
1114{
1115 int ret;
1116 struct scsi_target *starget =
1117 (struct scsi_target *)file->f_inode->i_private;
1118 struct sdebug_target_info *targetip =
1119 (struct sdebug_target_info *)starget->hostdata;
1120
1121 if (targetip) {
1122 ret = kstrtobool_from_user(ubuf, count, &targetip->reset_fail);
1123 return ret < 0 ? ret : count;
1124 }
1125 return -ENODEV;
1126}
1127
1128static const struct file_operations sdebug_target_reset_fail_fops = {
1129 .open = sdebug_target_reset_fail_open,
1130 .read = seq_read,
1131 .write = sdebug_target_reset_fail_write,
1132 .release = single_release,
1133};
1134
1135static int sdebug_target_alloc(struct scsi_target *starget)
1136{
1137 struct sdebug_target_info *targetip;
1138
1139 targetip = kzalloc(sizeof(struct sdebug_target_info), GFP_KERNEL);
1140 if (!targetip)
1141 return -ENOMEM;
1142
1143 targetip->debugfs_entry = debugfs_create_dir(dev_name(&starget->dev),
1144 sdebug_debugfs_root);
1145
1146 debugfs_create_file("fail_reset", 0600, targetip->debugfs_entry, starget,
1147 &sdebug_target_reset_fail_fops);
1148
1149 starget->hostdata = targetip;
1150
1151 return 0;
1152}
1153
1154static void sdebug_tartget_cleanup_async(void *data, async_cookie_t cookie)
1155{
1156 struct sdebug_target_info *targetip = data;
1157
1158 debugfs_remove(targetip->debugfs_entry);
1159 kfree(targetip);
1160}
1161
1162static void sdebug_target_destroy(struct scsi_target *starget)
1163{
1164 struct sdebug_target_info *targetip;
1165
1166 targetip = (struct sdebug_target_info *)starget->hostdata;
1167 if (targetip) {
1168 starget->hostdata = NULL;
1169 async_schedule(sdebug_tartget_cleanup_async, targetip);
1170 }
1171}
1172
1173/* Only do the extra work involved in logical block provisioning if one or
1174 * more of the lbpu, lbpws or lbpws10 parameters are given and we are doing
1175 * real reads and writes (i.e. not skipping them for speed).
1176 */
1177static inline bool scsi_debug_lbp(void)
1178{
1179 return 0 == sdebug_fake_rw &&
1180 (sdebug_lbpu || sdebug_lbpws || sdebug_lbpws10);
1181}
1182
1183static void *lba2fake_store(struct sdeb_store_info *sip,
1184 unsigned long long lba)
1185{
1186 struct sdeb_store_info *lsip = sip;
1187
1188 lba = do_div(lba, sdebug_store_sectors);
1189 if (!sip || !sip->storep) {
1190 WARN_ON_ONCE(true);
1191 lsip = xa_load(per_store_ap, 0); /* should never be NULL */
1192 }
1193 return lsip->storep + lba * sdebug_sector_size;
1194}
1195
1196static struct t10_pi_tuple *dif_store(struct sdeb_store_info *sip,
1197 sector_t sector)
1198{
1199 sector = sector_div(sector, sdebug_store_sectors);
1200
1201 return sip->dif_storep + sector;
1202}
1203
1204static void sdebug_max_tgts_luns(void)
1205{
1206 struct sdebug_host_info *sdbg_host;
1207 struct Scsi_Host *hpnt;
1208
1209 mutex_lock(&sdebug_host_list_mutex);
1210 list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) {
1211 hpnt = sdbg_host->shost;
1212 if ((hpnt->this_id >= 0) &&
1213 (sdebug_num_tgts > hpnt->this_id))
1214 hpnt->max_id = sdebug_num_tgts + 1;
1215 else
1216 hpnt->max_id = sdebug_num_tgts;
1217 /* sdebug_max_luns; */
1218 hpnt->max_lun = SCSI_W_LUN_REPORT_LUNS + 1;
1219 }
1220 mutex_unlock(&sdebug_host_list_mutex);
1221}
1222
1223enum sdeb_cmd_data {SDEB_IN_DATA = 0, SDEB_IN_CDB = 1};
1224
1225/* Set in_bit to -1 to indicate no bit position of invalid field */
1226static void mk_sense_invalid_fld(struct scsi_cmnd *scp,
1227 enum sdeb_cmd_data c_d,
1228 int in_byte, int in_bit)
1229{
1230 unsigned char *sbuff;
1231 u8 sks[4];
1232 int sl, asc;
1233
1234 sbuff = scp->sense_buffer;
1235 if (!sbuff) {
1236 sdev_printk(KERN_ERR, scp->device,
1237 "%s: sense_buffer is NULL\n", __func__);
1238 return;
1239 }
1240 asc = c_d ? INVALID_FIELD_IN_CDB : INVALID_FIELD_IN_PARAM_LIST;
1241 memset(sbuff, 0, SCSI_SENSE_BUFFERSIZE);
1242 scsi_build_sense(scp, sdebug_dsense, ILLEGAL_REQUEST, asc, 0);
1243 memset(sks, 0, sizeof(sks));
1244 sks[0] = 0x80;
1245 if (c_d)
1246 sks[0] |= 0x40;
1247 if (in_bit >= 0) {
1248 sks[0] |= 0x8;
1249 sks[0] |= 0x7 & in_bit;
1250 }
1251 put_unaligned_be16(in_byte, sks + 1);
1252 if (sdebug_dsense) {
1253 sl = sbuff[7] + 8;
1254 sbuff[7] = sl;
1255 sbuff[sl] = 0x2;
1256 sbuff[sl + 1] = 0x6;
1257 memcpy(sbuff + sl + 4, sks, 3);
1258 } else
1259 memcpy(sbuff + 15, sks, 3);
1260 if (sdebug_verbose)
1261 sdev_printk(KERN_INFO, scp->device, "%s: [sense_key,asc,ascq"
1262 "]: [0x5,0x%x,0x0] %c byte=%d, bit=%d\n",
1263 my_name, asc, c_d ? 'C' : 'D', in_byte, in_bit);
1264}
1265
1266static void mk_sense_buffer(struct scsi_cmnd *scp, int key, int asc, int asq)
1267{
1268 if (!scp->sense_buffer) {
1269 sdev_printk(KERN_ERR, scp->device,
1270 "%s: sense_buffer is NULL\n", __func__);
1271 return;
1272 }
1273 memset(scp->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
1274
1275 scsi_build_sense(scp, sdebug_dsense, key, asc, asq);
1276
1277 if (sdebug_verbose)
1278 sdev_printk(KERN_INFO, scp->device,
1279 "%s: [sense_key,asc,ascq]: [0x%x,0x%x,0x%x]\n",
1280 my_name, key, asc, asq);
1281}
1282
1283static void mk_sense_invalid_opcode(struct scsi_cmnd *scp)
1284{
1285 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_OPCODE, 0);
1286}
1287
1288static int scsi_debug_ioctl(struct scsi_device *dev, unsigned int cmd,
1289 void __user *arg)
1290{
1291 if (sdebug_verbose) {
1292 if (0x1261 == cmd)
1293 sdev_printk(KERN_INFO, dev,
1294 "%s: BLKFLSBUF [0x1261]\n", __func__);
1295 else if (0x5331 == cmd)
1296 sdev_printk(KERN_INFO, dev,
1297 "%s: CDROM_GET_CAPABILITY [0x5331]\n",
1298 __func__);
1299 else
1300 sdev_printk(KERN_INFO, dev, "%s: cmd=0x%x\n",
1301 __func__, cmd);
1302 }
1303 return -EINVAL;
1304 /* return -ENOTTY; // correct return but upsets fdisk */
1305}
1306
1307static void config_cdb_len(struct scsi_device *sdev)
1308{
1309 switch (sdebug_cdb_len) {
1310 case 6: /* suggest 6 byte READ, WRITE and MODE SENSE/SELECT */
1311 sdev->use_10_for_rw = false;
1312 sdev->use_16_for_rw = false;
1313 sdev->use_10_for_ms = false;
1314 break;
1315 case 10: /* suggest 10 byte RWs and 6 byte MODE SENSE/SELECT */
1316 sdev->use_10_for_rw = true;
1317 sdev->use_16_for_rw = false;
1318 sdev->use_10_for_ms = false;
1319 break;
1320 case 12: /* suggest 10 byte RWs and 10 byte MODE SENSE/SELECT */
1321 sdev->use_10_for_rw = true;
1322 sdev->use_16_for_rw = false;
1323 sdev->use_10_for_ms = true;
1324 break;
1325 case 16:
1326 sdev->use_10_for_rw = false;
1327 sdev->use_16_for_rw = true;
1328 sdev->use_10_for_ms = true;
1329 break;
1330 case 32: /* No knobs to suggest this so same as 16 for now */
1331 sdev->use_10_for_rw = false;
1332 sdev->use_16_for_rw = true;
1333 sdev->use_10_for_ms = true;
1334 break;
1335 default:
1336 pr_warn("unexpected cdb_len=%d, force to 10\n",
1337 sdebug_cdb_len);
1338 sdev->use_10_for_rw = true;
1339 sdev->use_16_for_rw = false;
1340 sdev->use_10_for_ms = false;
1341 sdebug_cdb_len = 10;
1342 break;
1343 }
1344}
1345
1346static void all_config_cdb_len(void)
1347{
1348 struct sdebug_host_info *sdbg_host;
1349 struct Scsi_Host *shost;
1350 struct scsi_device *sdev;
1351
1352 mutex_lock(&sdebug_host_list_mutex);
1353 list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) {
1354 shost = sdbg_host->shost;
1355 shost_for_each_device(sdev, shost) {
1356 config_cdb_len(sdev);
1357 }
1358 }
1359 mutex_unlock(&sdebug_host_list_mutex);
1360}
1361
1362static void clear_luns_changed_on_target(struct sdebug_dev_info *devip)
1363{
1364 struct sdebug_host_info *sdhp = devip->sdbg_host;
1365 struct sdebug_dev_info *dp;
1366
1367 list_for_each_entry(dp, &sdhp->dev_info_list, dev_list) {
1368 if ((devip->sdbg_host == dp->sdbg_host) &&
1369 (devip->target == dp->target)) {
1370 clear_bit(SDEBUG_UA_LUNS_CHANGED, dp->uas_bm);
1371 }
1372 }
1373}
1374
1375static int make_ua(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
1376{
1377 int k;
1378
1379 k = find_first_bit(devip->uas_bm, SDEBUG_NUM_UAS);
1380 if (k != SDEBUG_NUM_UAS) {
1381 const char *cp = NULL;
1382
1383 switch (k) {
1384 case SDEBUG_UA_POR:
1385 mk_sense_buffer(scp, UNIT_ATTENTION, UA_RESET_ASC,
1386 POWER_ON_RESET_ASCQ);
1387 if (sdebug_verbose)
1388 cp = "power on reset";
1389 break;
1390 case SDEBUG_UA_POOCCUR:
1391 mk_sense_buffer(scp, UNIT_ATTENTION, UA_RESET_ASC,
1392 POWER_ON_OCCURRED_ASCQ);
1393 if (sdebug_verbose)
1394 cp = "power on occurred";
1395 break;
1396 case SDEBUG_UA_BUS_RESET:
1397 mk_sense_buffer(scp, UNIT_ATTENTION, UA_RESET_ASC,
1398 BUS_RESET_ASCQ);
1399 if (sdebug_verbose)
1400 cp = "bus reset";
1401 break;
1402 case SDEBUG_UA_MODE_CHANGED:
1403 mk_sense_buffer(scp, UNIT_ATTENTION, UA_CHANGED_ASC,
1404 MODE_CHANGED_ASCQ);
1405 if (sdebug_verbose)
1406 cp = "mode parameters changed";
1407 break;
1408 case SDEBUG_UA_CAPACITY_CHANGED:
1409 mk_sense_buffer(scp, UNIT_ATTENTION, UA_CHANGED_ASC,
1410 CAPACITY_CHANGED_ASCQ);
1411 if (sdebug_verbose)
1412 cp = "capacity data changed";
1413 break;
1414 case SDEBUG_UA_MICROCODE_CHANGED:
1415 mk_sense_buffer(scp, UNIT_ATTENTION,
1416 TARGET_CHANGED_ASC,
1417 MICROCODE_CHANGED_ASCQ);
1418 if (sdebug_verbose)
1419 cp = "microcode has been changed";
1420 break;
1421 case SDEBUG_UA_MICROCODE_CHANGED_WO_RESET:
1422 mk_sense_buffer(scp, UNIT_ATTENTION,
1423 TARGET_CHANGED_ASC,
1424 MICROCODE_CHANGED_WO_RESET_ASCQ);
1425 if (sdebug_verbose)
1426 cp = "microcode has been changed without reset";
1427 break;
1428 case SDEBUG_UA_LUNS_CHANGED:
1429 /*
1430 * SPC-3 behavior is to report a UNIT ATTENTION with
1431 * ASC/ASCQ REPORTED LUNS DATA HAS CHANGED on every LUN
1432 * on the target, until a REPORT LUNS command is
1433 * received. SPC-4 behavior is to report it only once.
1434 * NOTE: sdebug_scsi_level does not use the same
1435 * values as struct scsi_device->scsi_level.
1436 */
1437 if (sdebug_scsi_level >= 6) /* SPC-4 and above */
1438 clear_luns_changed_on_target(devip);
1439 mk_sense_buffer(scp, UNIT_ATTENTION,
1440 TARGET_CHANGED_ASC,
1441 LUNS_CHANGED_ASCQ);
1442 if (sdebug_verbose)
1443 cp = "reported luns data has changed";
1444 break;
1445 default:
1446 pr_warn("unexpected unit attention code=%d\n", k);
1447 if (sdebug_verbose)
1448 cp = "unknown";
1449 break;
1450 }
1451 clear_bit(k, devip->uas_bm);
1452 if (sdebug_verbose)
1453 sdev_printk(KERN_INFO, scp->device,
1454 "%s reports: Unit attention: %s\n",
1455 my_name, cp);
1456 return check_condition_result;
1457 }
1458 return 0;
1459}
1460
1461/* Build SCSI "data-in" buffer. Returns 0 if ok else (DID_ERROR << 16). */
1462static int fill_from_dev_buffer(struct scsi_cmnd *scp, unsigned char *arr,
1463 int arr_len)
1464{
1465 int act_len;
1466 struct scsi_data_buffer *sdb = &scp->sdb;
1467
1468 if (!sdb->length)
1469 return 0;
1470 if (scp->sc_data_direction != DMA_FROM_DEVICE)
1471 return DID_ERROR << 16;
1472
1473 act_len = sg_copy_from_buffer(sdb->table.sgl, sdb->table.nents,
1474 arr, arr_len);
1475 scsi_set_resid(scp, scsi_bufflen(scp) - act_len);
1476
1477 return 0;
1478}
1479
1480/* Partial build of SCSI "data-in" buffer. Returns 0 if ok else
1481 * (DID_ERROR << 16). Can write to offset in data-in buffer. If multiple
1482 * calls, not required to write in ascending offset order. Assumes resid
1483 * set to scsi_bufflen() prior to any calls.
1484 */
1485static int p_fill_from_dev_buffer(struct scsi_cmnd *scp, const void *arr,
1486 int arr_len, unsigned int off_dst)
1487{
1488 unsigned int act_len, n;
1489 struct scsi_data_buffer *sdb = &scp->sdb;
1490 off_t skip = off_dst;
1491
1492 if (sdb->length <= off_dst)
1493 return 0;
1494 if (scp->sc_data_direction != DMA_FROM_DEVICE)
1495 return DID_ERROR << 16;
1496
1497 act_len = sg_pcopy_from_buffer(sdb->table.sgl, sdb->table.nents,
1498 arr, arr_len, skip);
1499 pr_debug("%s: off_dst=%u, scsi_bufflen=%u, act_len=%u, resid=%d\n",
1500 __func__, off_dst, scsi_bufflen(scp), act_len,
1501 scsi_get_resid(scp));
1502 n = scsi_bufflen(scp) - (off_dst + act_len);
1503 scsi_set_resid(scp, min_t(u32, scsi_get_resid(scp), n));
1504 return 0;
1505}
1506
1507/* Fetches from SCSI "data-out" buffer. Returns number of bytes fetched into
1508 * 'arr' or -1 if error.
1509 */
1510static int fetch_to_dev_buffer(struct scsi_cmnd *scp, unsigned char *arr,
1511 int arr_len)
1512{
1513 if (!scsi_bufflen(scp))
1514 return 0;
1515 if (scp->sc_data_direction != DMA_TO_DEVICE)
1516 return -1;
1517
1518 return scsi_sg_copy_to_buffer(scp, arr, arr_len);
1519}
1520
1521
1522static char sdebug_inq_vendor_id[9] = "Linux ";
1523static char sdebug_inq_product_id[17] = "scsi_debug ";
1524static char sdebug_inq_product_rev[5] = SDEBUG_VERSION;
1525/* Use some locally assigned NAAs for SAS addresses. */
1526static const u64 naa3_comp_a = 0x3222222000000000ULL;
1527static const u64 naa3_comp_b = 0x3333333000000000ULL;
1528static const u64 naa3_comp_c = 0x3111111000000000ULL;
1529
1530/* Device identification VPD page. Returns number of bytes placed in arr */
1531static int inquiry_vpd_83(unsigned char *arr, int port_group_id,
1532 int target_dev_id, int dev_id_num,
1533 const char *dev_id_str, int dev_id_str_len,
1534 const uuid_t *lu_name)
1535{
1536 int num, port_a;
1537 char b[32];
1538
1539 port_a = target_dev_id + 1;
1540 /* T10 vendor identifier field format (faked) */
1541 arr[0] = 0x2; /* ASCII */
1542 arr[1] = 0x1;
1543 arr[2] = 0x0;
1544 memcpy(&arr[4], sdebug_inq_vendor_id, 8);
1545 memcpy(&arr[12], sdebug_inq_product_id, 16);
1546 memcpy(&arr[28], dev_id_str, dev_id_str_len);
1547 num = 8 + 16 + dev_id_str_len;
1548 arr[3] = num;
1549 num += 4;
1550 if (dev_id_num >= 0) {
1551 if (sdebug_uuid_ctl) {
1552 /* Locally assigned UUID */
1553 arr[num++] = 0x1; /* binary (not necessarily sas) */
1554 arr[num++] = 0xa; /* PIV=0, lu, naa */
1555 arr[num++] = 0x0;
1556 arr[num++] = 0x12;
1557 arr[num++] = 0x10; /* uuid type=1, locally assigned */
1558 arr[num++] = 0x0;
1559 memcpy(arr + num, lu_name, 16);
1560 num += 16;
1561 } else {
1562 /* NAA-3, Logical unit identifier (binary) */
1563 arr[num++] = 0x1; /* binary (not necessarily sas) */
1564 arr[num++] = 0x3; /* PIV=0, lu, naa */
1565 arr[num++] = 0x0;
1566 arr[num++] = 0x8;
1567 put_unaligned_be64(naa3_comp_b + dev_id_num, arr + num);
1568 num += 8;
1569 }
1570 /* Target relative port number */
1571 arr[num++] = 0x61; /* proto=sas, binary */
1572 arr[num++] = 0x94; /* PIV=1, target port, rel port */
1573 arr[num++] = 0x0; /* reserved */
1574 arr[num++] = 0x4; /* length */
1575 arr[num++] = 0x0; /* reserved */
1576 arr[num++] = 0x0; /* reserved */
1577 arr[num++] = 0x0;
1578 arr[num++] = 0x1; /* relative port A */
1579 }
1580 /* NAA-3, Target port identifier */
1581 arr[num++] = 0x61; /* proto=sas, binary */
1582 arr[num++] = 0x93; /* piv=1, target port, naa */
1583 arr[num++] = 0x0;
1584 arr[num++] = 0x8;
1585 put_unaligned_be64(naa3_comp_a + port_a, arr + num);
1586 num += 8;
1587 /* NAA-3, Target port group identifier */
1588 arr[num++] = 0x61; /* proto=sas, binary */
1589 arr[num++] = 0x95; /* piv=1, target port group id */
1590 arr[num++] = 0x0;
1591 arr[num++] = 0x4;
1592 arr[num++] = 0;
1593 arr[num++] = 0;
1594 put_unaligned_be16(port_group_id, arr + num);
1595 num += 2;
1596 /* NAA-3, Target device identifier */
1597 arr[num++] = 0x61; /* proto=sas, binary */
1598 arr[num++] = 0xa3; /* piv=1, target device, naa */
1599 arr[num++] = 0x0;
1600 arr[num++] = 0x8;
1601 put_unaligned_be64(naa3_comp_a + target_dev_id, arr + num);
1602 num += 8;
1603 /* SCSI name string: Target device identifier */
1604 arr[num++] = 0x63; /* proto=sas, UTF-8 */
1605 arr[num++] = 0xa8; /* piv=1, target device, SCSI name string */
1606 arr[num++] = 0x0;
1607 arr[num++] = 24;
1608 memcpy(arr + num, "naa.32222220", 12);
1609 num += 12;
1610 snprintf(b, sizeof(b), "%08X", target_dev_id);
1611 memcpy(arr + num, b, 8);
1612 num += 8;
1613 memset(arr + num, 0, 4);
1614 num += 4;
1615 return num;
1616}
1617
1618static unsigned char vpd84_data[] = {
1619/* from 4th byte */ 0x22,0x22,0x22,0x0,0xbb,0x0,
1620 0x22,0x22,0x22,0x0,0xbb,0x1,
1621 0x22,0x22,0x22,0x0,0xbb,0x2,
1622};
1623
1624/* Software interface identification VPD page */
1625static int inquiry_vpd_84(unsigned char *arr)
1626{
1627 memcpy(arr, vpd84_data, sizeof(vpd84_data));
1628 return sizeof(vpd84_data);
1629}
1630
1631/* Management network addresses VPD page */
1632static int inquiry_vpd_85(unsigned char *arr)
1633{
1634 int num = 0;
1635 const char *na1 = "https://www.kernel.org/config";
1636 const char *na2 = "http://www.kernel.org/log";
1637 int plen, olen;
1638
1639 arr[num++] = 0x1; /* lu, storage config */
1640 arr[num++] = 0x0; /* reserved */
1641 arr[num++] = 0x0;
1642 olen = strlen(na1);
1643 plen = olen + 1;
1644 if (plen % 4)
1645 plen = ((plen / 4) + 1) * 4;
1646 arr[num++] = plen; /* length, null termianted, padded */
1647 memcpy(arr + num, na1, olen);
1648 memset(arr + num + olen, 0, plen - olen);
1649 num += plen;
1650
1651 arr[num++] = 0x4; /* lu, logging */
1652 arr[num++] = 0x0; /* reserved */
1653 arr[num++] = 0x0;
1654 olen = strlen(na2);
1655 plen = olen + 1;
1656 if (plen % 4)
1657 plen = ((plen / 4) + 1) * 4;
1658 arr[num++] = plen; /* length, null terminated, padded */
1659 memcpy(arr + num, na2, olen);
1660 memset(arr + num + olen, 0, plen - olen);
1661 num += plen;
1662
1663 return num;
1664}
1665
1666/* SCSI ports VPD page */
1667static int inquiry_vpd_88(unsigned char *arr, int target_dev_id)
1668{
1669 int num = 0;
1670 int port_a, port_b;
1671
1672 port_a = target_dev_id + 1;
1673 port_b = port_a + 1;
1674 arr[num++] = 0x0; /* reserved */
1675 arr[num++] = 0x0; /* reserved */
1676 arr[num++] = 0x0;
1677 arr[num++] = 0x1; /* relative port 1 (primary) */
1678 memset(arr + num, 0, 6);
1679 num += 6;
1680 arr[num++] = 0x0;
1681 arr[num++] = 12; /* length tp descriptor */
1682 /* naa-5 target port identifier (A) */
1683 arr[num++] = 0x61; /* proto=sas, binary */
1684 arr[num++] = 0x93; /* PIV=1, target port, NAA */
1685 arr[num++] = 0x0; /* reserved */
1686 arr[num++] = 0x8; /* length */
1687 put_unaligned_be64(naa3_comp_a + port_a, arr + num);
1688 num += 8;
1689 arr[num++] = 0x0; /* reserved */
1690 arr[num++] = 0x0; /* reserved */
1691 arr[num++] = 0x0;
1692 arr[num++] = 0x2; /* relative port 2 (secondary) */
1693 memset(arr + num, 0, 6);
1694 num += 6;
1695 arr[num++] = 0x0;
1696 arr[num++] = 12; /* length tp descriptor */
1697 /* naa-5 target port identifier (B) */
1698 arr[num++] = 0x61; /* proto=sas, binary */
1699 arr[num++] = 0x93; /* PIV=1, target port, NAA */
1700 arr[num++] = 0x0; /* reserved */
1701 arr[num++] = 0x8; /* length */
1702 put_unaligned_be64(naa3_comp_a + port_b, arr + num);
1703 num += 8;
1704
1705 return num;
1706}
1707
1708
1709static unsigned char vpd89_data[] = {
1710/* from 4th byte */ 0,0,0,0,
1711'l','i','n','u','x',' ',' ',' ',
1712'S','A','T',' ','s','c','s','i','_','d','e','b','u','g',' ',' ',
1713'1','2','3','4',
17140x34,0,0,0,1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,
17150xec,0,0,0,
17160x5a,0xc,0xff,0x3f,0x37,0xc8,0x10,0,0,0,0,0,0x3f,0,0,0,
17170,0,0,0,0x58,0x58,0x58,0x58,0x58,0x58,0x58,0x58,0x20,0x20,0x20,0x20,
17180x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0,0,0,0x40,0x4,0,0x2e,0x33,
17190x38,0x31,0x20,0x20,0x20,0x20,0x54,0x53,0x38,0x33,0x30,0x30,0x33,0x31,
17200x53,0x41,
17210x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,
17220x20,0x20,
17230x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,
17240x10,0x80,
17250,0,0,0x2f,0,0,0,0x2,0,0x2,0x7,0,0xff,0xff,0x1,0,
17260x3f,0,0xc1,0xff,0x3e,0,0x10,0x1,0xb0,0xf8,0x50,0x9,0,0,0x7,0,
17270x3,0,0x78,0,0x78,0,0xf0,0,0x78,0,0,0,0,0,0,0,
17280,0,0,0,0,0,0,0,0x2,0,0,0,0,0,0,0,
17290x7e,0,0x1b,0,0x6b,0x34,0x1,0x7d,0x3,0x40,0x69,0x34,0x1,0x3c,0x3,0x40,
17300x7f,0x40,0,0,0,0,0xfe,0xfe,0,0,0,0,0,0xfe,0,0,
17310,0,0,0,0,0,0,0,0xb0,0xf8,0x50,0x9,0,0,0,0,
17320,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
17330,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
17340,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
17350x1,0,0xb0,0xf8,0x50,0x9,0xb0,0xf8,0x50,0x9,0x20,0x20,0x2,0,0xb6,0x42,
17360,0x80,0x8a,0,0x6,0x3c,0xa,0x3c,0xff,0xff,0xc6,0x7,0,0x1,0,0x8,
17370xf0,0xf,0,0x10,0x2,0,0x30,0,0,0,0,0,0,0,0x6,0xfe,
17380,0,0x2,0,0x50,0,0x8a,0,0x4f,0x95,0,0,0x21,0,0xb,0,
17390,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
17400,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
17410,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
17420,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
17430,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
17440,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
17450,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
17460,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
17470,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
17480,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
17490,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
17500,0,0,0,0,0,0,0,0,0,0,0,0,0,0xa5,0x51,
1751};
1752
1753/* ATA Information VPD page */
1754static int inquiry_vpd_89(unsigned char *arr)
1755{
1756 memcpy(arr, vpd89_data, sizeof(vpd89_data));
1757 return sizeof(vpd89_data);
1758}
1759
1760
1761static unsigned char vpdb0_data[] = {
1762 /* from 4th byte */ 0,0,0,4, 0,0,0x4,0, 0,0,0,64,
1763 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1764 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1765 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1766};
1767
1768/* Block limits VPD page (SBC-3) */
1769static int inquiry_vpd_b0(unsigned char *arr)
1770{
1771 unsigned int gran;
1772
1773 memcpy(arr, vpdb0_data, sizeof(vpdb0_data));
1774
1775 /* Optimal transfer length granularity */
1776 if (sdebug_opt_xferlen_exp != 0 &&
1777 sdebug_physblk_exp < sdebug_opt_xferlen_exp)
1778 gran = 1 << sdebug_opt_xferlen_exp;
1779 else
1780 gran = 1 << sdebug_physblk_exp;
1781 put_unaligned_be16(gran, arr + 2);
1782
1783 /* Maximum Transfer Length */
1784 if (sdebug_store_sectors > 0x400)
1785 put_unaligned_be32(sdebug_store_sectors, arr + 4);
1786
1787 /* Optimal Transfer Length */
1788 put_unaligned_be32(sdebug_opt_blks, &arr[8]);
1789
1790 if (sdebug_lbpu) {
1791 /* Maximum Unmap LBA Count */
1792 put_unaligned_be32(sdebug_unmap_max_blocks, &arr[16]);
1793
1794 /* Maximum Unmap Block Descriptor Count */
1795 put_unaligned_be32(sdebug_unmap_max_desc, &arr[20]);
1796 }
1797
1798 /* Unmap Granularity Alignment */
1799 if (sdebug_unmap_alignment) {
1800 put_unaligned_be32(sdebug_unmap_alignment, &arr[28]);
1801 arr[28] |= 0x80; /* UGAVALID */
1802 }
1803
1804 /* Optimal Unmap Granularity */
1805 put_unaligned_be32(sdebug_unmap_granularity, &arr[24]);
1806
1807 /* Maximum WRITE SAME Length */
1808 put_unaligned_be64(sdebug_write_same_length, &arr[32]);
1809
1810 return 0x3c; /* Mandatory page length for Logical Block Provisioning */
1811}
1812
1813/* Block device characteristics VPD page (SBC-3) */
1814static int inquiry_vpd_b1(struct sdebug_dev_info *devip, unsigned char *arr)
1815{
1816 memset(arr, 0, 0x3c);
1817 arr[0] = 0;
1818 arr[1] = 1; /* non rotating medium (e.g. solid state) */
1819 arr[2] = 0;
1820 arr[3] = 5; /* less than 1.8" */
1821
1822 return 0x3c;
1823}
1824
1825/* Logical block provisioning VPD page (SBC-4) */
1826static int inquiry_vpd_b2(unsigned char *arr)
1827{
1828 memset(arr, 0, 0x4);
1829 arr[0] = 0; /* threshold exponent */
1830 if (sdebug_lbpu)
1831 arr[1] = 1 << 7;
1832 if (sdebug_lbpws)
1833 arr[1] |= 1 << 6;
1834 if (sdebug_lbpws10)
1835 arr[1] |= 1 << 5;
1836 if (sdebug_lbprz && scsi_debug_lbp())
1837 arr[1] |= (sdebug_lbprz & 0x7) << 2; /* sbc4r07 and later */
1838 /* anc_sup=0; dp=0 (no provisioning group descriptor) */
1839 /* minimum_percentage=0; provisioning_type=0 (unknown) */
1840 /* threshold_percentage=0 */
1841 return 0x4;
1842}
1843
1844/* Zoned block device characteristics VPD page (ZBC mandatory) */
1845static int inquiry_vpd_b6(struct sdebug_dev_info *devip, unsigned char *arr)
1846{
1847 memset(arr, 0, 0x3c);
1848 arr[0] = 0x1; /* set URSWRZ (unrestricted read in seq. wr req zone) */
1849 /*
1850 * Set Optimal number of open sequential write preferred zones and
1851 * Optimal number of non-sequentially written sequential write
1852 * preferred zones fields to 'not reported' (0xffffffff). Leave other
1853 * fields set to zero, apart from Max. number of open swrz_s field.
1854 */
1855 put_unaligned_be32(0xffffffff, &arr[4]);
1856 put_unaligned_be32(0xffffffff, &arr[8]);
1857 if (sdeb_zbc_model == BLK_ZONED_HM && devip->max_open)
1858 put_unaligned_be32(devip->max_open, &arr[12]);
1859 else
1860 put_unaligned_be32(0xffffffff, &arr[12]);
1861 if (devip->zcap < devip->zsize) {
1862 arr[19] = ZBC_CONSTANT_ZONE_START_OFFSET;
1863 put_unaligned_be64(devip->zsize, &arr[20]);
1864 } else {
1865 arr[19] = 0;
1866 }
1867 return 0x3c;
1868}
1869
1870#define SDEBUG_LONG_INQ_SZ 96
1871#define SDEBUG_MAX_INQ_ARR_SZ 584
1872
1873static int resp_inquiry(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
1874{
1875 unsigned char pq_pdt;
1876 unsigned char *arr;
1877 unsigned char *cmd = scp->cmnd;
1878 u32 alloc_len, n;
1879 int ret;
1880 bool have_wlun, is_disk, is_zbc, is_disk_zbc;
1881
1882 alloc_len = get_unaligned_be16(cmd + 3);
1883 arr = kzalloc(SDEBUG_MAX_INQ_ARR_SZ, GFP_ATOMIC);
1884 if (! arr)
1885 return DID_REQUEUE << 16;
1886 is_disk = (sdebug_ptype == TYPE_DISK);
1887 is_zbc = devip->zoned;
1888 is_disk_zbc = (is_disk || is_zbc);
1889 have_wlun = scsi_is_wlun(scp->device->lun);
1890 if (have_wlun)
1891 pq_pdt = TYPE_WLUN; /* present, wlun */
1892 else if (sdebug_no_lun_0 && (devip->lun == SDEBUG_LUN_0_VAL))
1893 pq_pdt = 0x7f; /* not present, PQ=3, PDT=0x1f */
1894 else
1895 pq_pdt = (sdebug_ptype & 0x1f);
1896 arr[0] = pq_pdt;
1897 if (0x2 & cmd[1]) { /* CMDDT bit set */
1898 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 1);
1899 kfree(arr);
1900 return check_condition_result;
1901 } else if (0x1 & cmd[1]) { /* EVPD bit set */
1902 int lu_id_num, port_group_id, target_dev_id;
1903 u32 len;
1904 char lu_id_str[6];
1905 int host_no = devip->sdbg_host->shost->host_no;
1906
1907 port_group_id = (((host_no + 1) & 0x7f) << 8) +
1908 (devip->channel & 0x7f);
1909 if (sdebug_vpd_use_hostno == 0)
1910 host_no = 0;
1911 lu_id_num = have_wlun ? -1 : (((host_no + 1) * 2000) +
1912 (devip->target * 1000) + devip->lun);
1913 target_dev_id = ((host_no + 1) * 2000) +
1914 (devip->target * 1000) - 3;
1915 len = scnprintf(lu_id_str, 6, "%d", lu_id_num);
1916 if (0 == cmd[2]) { /* supported vital product data pages */
1917 arr[1] = cmd[2]; /*sanity */
1918 n = 4;
1919 arr[n++] = 0x0; /* this page */
1920 arr[n++] = 0x80; /* unit serial number */
1921 arr[n++] = 0x83; /* device identification */
1922 arr[n++] = 0x84; /* software interface ident. */
1923 arr[n++] = 0x85; /* management network addresses */
1924 arr[n++] = 0x86; /* extended inquiry */
1925 arr[n++] = 0x87; /* mode page policy */
1926 arr[n++] = 0x88; /* SCSI ports */
1927 if (is_disk_zbc) { /* SBC or ZBC */
1928 arr[n++] = 0x89; /* ATA information */
1929 arr[n++] = 0xb0; /* Block limits */
1930 arr[n++] = 0xb1; /* Block characteristics */
1931 if (is_disk)
1932 arr[n++] = 0xb2; /* LB Provisioning */
1933 if (is_zbc)
1934 arr[n++] = 0xb6; /* ZB dev. char. */
1935 }
1936 arr[3] = n - 4; /* number of supported VPD pages */
1937 } else if (0x80 == cmd[2]) { /* unit serial number */
1938 arr[1] = cmd[2]; /*sanity */
1939 arr[3] = len;
1940 memcpy(&arr[4], lu_id_str, len);
1941 } else if (0x83 == cmd[2]) { /* device identification */
1942 arr[1] = cmd[2]; /*sanity */
1943 arr[3] = inquiry_vpd_83(&arr[4], port_group_id,
1944 target_dev_id, lu_id_num,
1945 lu_id_str, len,
1946 &devip->lu_name);
1947 } else if (0x84 == cmd[2]) { /* Software interface ident. */
1948 arr[1] = cmd[2]; /*sanity */
1949 arr[3] = inquiry_vpd_84(&arr[4]);
1950 } else if (0x85 == cmd[2]) { /* Management network addresses */
1951 arr[1] = cmd[2]; /*sanity */
1952 arr[3] = inquiry_vpd_85(&arr[4]);
1953 } else if (0x86 == cmd[2]) { /* extended inquiry */
1954 arr[1] = cmd[2]; /*sanity */
1955 arr[3] = 0x3c; /* number of following entries */
1956 if (sdebug_dif == T10_PI_TYPE3_PROTECTION)
1957 arr[4] = 0x4; /* SPT: GRD_CHK:1 */
1958 else if (have_dif_prot)
1959 arr[4] = 0x5; /* SPT: GRD_CHK:1, REF_CHK:1 */
1960 else
1961 arr[4] = 0x0; /* no protection stuff */
1962 arr[5] = 0x7; /* head of q, ordered + simple q's */
1963 } else if (0x87 == cmd[2]) { /* mode page policy */
1964 arr[1] = cmd[2]; /*sanity */
1965 arr[3] = 0x8; /* number of following entries */
1966 arr[4] = 0x2; /* disconnect-reconnect mp */
1967 arr[6] = 0x80; /* mlus, shared */
1968 arr[8] = 0x18; /* protocol specific lu */
1969 arr[10] = 0x82; /* mlus, per initiator port */
1970 } else if (0x88 == cmd[2]) { /* SCSI Ports */
1971 arr[1] = cmd[2]; /*sanity */
1972 arr[3] = inquiry_vpd_88(&arr[4], target_dev_id);
1973 } else if (is_disk_zbc && 0x89 == cmd[2]) { /* ATA info */
1974 arr[1] = cmd[2]; /*sanity */
1975 n = inquiry_vpd_89(&arr[4]);
1976 put_unaligned_be16(n, arr + 2);
1977 } else if (is_disk_zbc && 0xb0 == cmd[2]) { /* Block limits */
1978 arr[1] = cmd[2]; /*sanity */
1979 arr[3] = inquiry_vpd_b0(&arr[4]);
1980 } else if (is_disk_zbc && 0xb1 == cmd[2]) { /* Block char. */
1981 arr[1] = cmd[2]; /*sanity */
1982 arr[3] = inquiry_vpd_b1(devip, &arr[4]);
1983 } else if (is_disk && 0xb2 == cmd[2]) { /* LB Prov. */
1984 arr[1] = cmd[2]; /*sanity */
1985 arr[3] = inquiry_vpd_b2(&arr[4]);
1986 } else if (is_zbc && cmd[2] == 0xb6) { /* ZB dev. charact. */
1987 arr[1] = cmd[2]; /*sanity */
1988 arr[3] = inquiry_vpd_b6(devip, &arr[4]);
1989 } else {
1990 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, -1);
1991 kfree(arr);
1992 return check_condition_result;
1993 }
1994 len = min_t(u32, get_unaligned_be16(arr + 2) + 4, alloc_len);
1995 ret = fill_from_dev_buffer(scp, arr,
1996 min_t(u32, len, SDEBUG_MAX_INQ_ARR_SZ));
1997 kfree(arr);
1998 return ret;
1999 }
2000 /* drops through here for a standard inquiry */
2001 arr[1] = sdebug_removable ? 0x80 : 0; /* Removable disk */
2002 arr[2] = sdebug_scsi_level;
2003 arr[3] = 2; /* response_data_format==2 */
2004 arr[4] = SDEBUG_LONG_INQ_SZ - 5;
2005 arr[5] = (int)have_dif_prot; /* PROTECT bit */
2006 if (sdebug_vpd_use_hostno == 0)
2007 arr[5] |= 0x10; /* claim: implicit TPGS */
2008 arr[6] = 0x10; /* claim: MultiP */
2009 /* arr[6] |= 0x40; ... claim: EncServ (enclosure services) */
2010 arr[7] = 0xa; /* claim: LINKED + CMDQUE */
2011 memcpy(&arr[8], sdebug_inq_vendor_id, 8);
2012 memcpy(&arr[16], sdebug_inq_product_id, 16);
2013 memcpy(&arr[32], sdebug_inq_product_rev, 4);
2014 /* Use Vendor Specific area to place driver date in ASCII hex */
2015 memcpy(&arr[36], sdebug_version_date, 8);
2016 /* version descriptors (2 bytes each) follow */
2017 put_unaligned_be16(0xc0, arr + 58); /* SAM-6 no version claimed */
2018 put_unaligned_be16(0x5c0, arr + 60); /* SPC-5 no version claimed */
2019 n = 62;
2020 if (is_disk) { /* SBC-4 no version claimed */
2021 put_unaligned_be16(0x600, arr + n);
2022 n += 2;
2023 } else if (sdebug_ptype == TYPE_TAPE) { /* SSC-4 rev 3 */
2024 put_unaligned_be16(0x525, arr + n);
2025 n += 2;
2026 } else if (is_zbc) { /* ZBC BSR INCITS 536 revision 05 */
2027 put_unaligned_be16(0x624, arr + n);
2028 n += 2;
2029 }
2030 put_unaligned_be16(0x2100, arr + n); /* SPL-4 no version claimed */
2031 ret = fill_from_dev_buffer(scp, arr,
2032 min_t(u32, alloc_len, SDEBUG_LONG_INQ_SZ));
2033 kfree(arr);
2034 return ret;
2035}
2036
2037/* See resp_iec_m_pg() for how this data is manipulated */
2038static unsigned char iec_m_pg[] = {0x1c, 0xa, 0x08, 0, 0, 0, 0, 0,
2039 0, 0, 0x0, 0x0};
2040
2041static int resp_requests(struct scsi_cmnd *scp,
2042 struct sdebug_dev_info *devip)
2043{
2044 unsigned char *cmd = scp->cmnd;
2045 unsigned char arr[SCSI_SENSE_BUFFERSIZE]; /* assume >= 18 bytes */
2046 bool dsense = !!(cmd[1] & 1);
2047 u32 alloc_len = cmd[4];
2048 u32 len = 18;
2049 int stopped_state = atomic_read(&devip->stopped);
2050
2051 memset(arr, 0, sizeof(arr));
2052 if (stopped_state > 0) { /* some "pollable" data [spc6r02: 5.12.2] */
2053 if (dsense) {
2054 arr[0] = 0x72;
2055 arr[1] = NOT_READY;
2056 arr[2] = LOGICAL_UNIT_NOT_READY;
2057 arr[3] = (stopped_state == 2) ? 0x1 : 0x2;
2058 len = 8;
2059 } else {
2060 arr[0] = 0x70;
2061 arr[2] = NOT_READY; /* NO_SENSE in sense_key */
2062 arr[7] = 0xa; /* 18 byte sense buffer */
2063 arr[12] = LOGICAL_UNIT_NOT_READY;
2064 arr[13] = (stopped_state == 2) ? 0x1 : 0x2;
2065 }
2066 } else if ((iec_m_pg[2] & 0x4) && (6 == (iec_m_pg[3] & 0xf))) {
2067 /* Information exceptions control mode page: TEST=1, MRIE=6 */
2068 if (dsense) {
2069 arr[0] = 0x72;
2070 arr[1] = 0x0; /* NO_SENSE in sense_key */
2071 arr[2] = THRESHOLD_EXCEEDED;
2072 arr[3] = 0xff; /* Failure prediction(false) */
2073 len = 8;
2074 } else {
2075 arr[0] = 0x70;
2076 arr[2] = 0x0; /* NO_SENSE in sense_key */
2077 arr[7] = 0xa; /* 18 byte sense buffer */
2078 arr[12] = THRESHOLD_EXCEEDED;
2079 arr[13] = 0xff; /* Failure prediction(false) */
2080 }
2081 } else { /* nothing to report */
2082 if (dsense) {
2083 len = 8;
2084 memset(arr, 0, len);
2085 arr[0] = 0x72;
2086 } else {
2087 memset(arr, 0, len);
2088 arr[0] = 0x70;
2089 arr[7] = 0xa;
2090 }
2091 }
2092 return fill_from_dev_buffer(scp, arr, min_t(u32, len, alloc_len));
2093}
2094
2095static int resp_start_stop(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
2096{
2097 unsigned char *cmd = scp->cmnd;
2098 int power_cond, want_stop, stopped_state;
2099 bool changing;
2100
2101 power_cond = (cmd[4] & 0xf0) >> 4;
2102 if (power_cond) {
2103 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 4, 7);
2104 return check_condition_result;
2105 }
2106 want_stop = !(cmd[4] & 1);
2107 stopped_state = atomic_read(&devip->stopped);
2108 if (stopped_state == 2) {
2109 ktime_t now_ts = ktime_get_boottime();
2110
2111 if (ktime_to_ns(now_ts) > ktime_to_ns(devip->create_ts)) {
2112 u64 diff_ns = ktime_to_ns(ktime_sub(now_ts, devip->create_ts));
2113
2114 if (diff_ns >= ((u64)sdeb_tur_ms_to_ready * 1000000)) {
2115 /* tur_ms_to_ready timer extinguished */
2116 atomic_set(&devip->stopped, 0);
2117 stopped_state = 0;
2118 }
2119 }
2120 if (stopped_state == 2) {
2121 if (want_stop) {
2122 stopped_state = 1; /* dummy up success */
2123 } else { /* Disallow tur_ms_to_ready delay to be overridden */
2124 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 4, 0 /* START bit */);
2125 return check_condition_result;
2126 }
2127 }
2128 }
2129 changing = (stopped_state != want_stop);
2130 if (changing)
2131 atomic_xchg(&devip->stopped, want_stop);
2132 if (!changing || (cmd[1] & 0x1)) /* state unchanged or IMMED bit set in cdb */
2133 return SDEG_RES_IMMED_MASK;
2134 else
2135 return 0;
2136}
2137
2138static sector_t get_sdebug_capacity(void)
2139{
2140 static const unsigned int gibibyte = 1073741824;
2141
2142 if (sdebug_virtual_gb > 0)
2143 return (sector_t)sdebug_virtual_gb *
2144 (gibibyte / sdebug_sector_size);
2145 else
2146 return sdebug_store_sectors;
2147}
2148
2149#define SDEBUG_READCAP_ARR_SZ 8
2150static int resp_readcap(struct scsi_cmnd *scp,
2151 struct sdebug_dev_info *devip)
2152{
2153 unsigned char arr[SDEBUG_READCAP_ARR_SZ];
2154 unsigned int capac;
2155
2156 /* following just in case virtual_gb changed */
2157 sdebug_capacity = get_sdebug_capacity();
2158 memset(arr, 0, SDEBUG_READCAP_ARR_SZ);
2159 if (sdebug_capacity < 0xffffffff) {
2160 capac = (unsigned int)sdebug_capacity - 1;
2161 put_unaligned_be32(capac, arr + 0);
2162 } else
2163 put_unaligned_be32(0xffffffff, arr + 0);
2164 put_unaligned_be16(sdebug_sector_size, arr + 6);
2165 return fill_from_dev_buffer(scp, arr, SDEBUG_READCAP_ARR_SZ);
2166}
2167
2168#define SDEBUG_READCAP16_ARR_SZ 32
2169static int resp_readcap16(struct scsi_cmnd *scp,
2170 struct sdebug_dev_info *devip)
2171{
2172 unsigned char *cmd = scp->cmnd;
2173 unsigned char arr[SDEBUG_READCAP16_ARR_SZ];
2174 u32 alloc_len;
2175
2176 alloc_len = get_unaligned_be32(cmd + 10);
2177 /* following just in case virtual_gb changed */
2178 sdebug_capacity = get_sdebug_capacity();
2179 memset(arr, 0, SDEBUG_READCAP16_ARR_SZ);
2180 put_unaligned_be64((u64)(sdebug_capacity - 1), arr + 0);
2181 put_unaligned_be32(sdebug_sector_size, arr + 8);
2182 arr[13] = sdebug_physblk_exp & 0xf;
2183 arr[14] = (sdebug_lowest_aligned >> 8) & 0x3f;
2184
2185 if (scsi_debug_lbp()) {
2186 arr[14] |= 0x80; /* LBPME */
2187 /* from sbc4r07, this LBPRZ field is 1 bit, but the LBPRZ in
2188 * the LB Provisioning VPD page is 3 bits. Note that lbprz=2
2189 * in the wider field maps to 0 in this field.
2190 */
2191 if (sdebug_lbprz & 1) /* precisely what the draft requires */
2192 arr[14] |= 0x40;
2193 }
2194
2195 /*
2196 * Since the scsi_debug READ CAPACITY implementation always reports the
2197 * total disk capacity, set RC BASIS = 1 for host-managed ZBC devices.
2198 */
2199 if (devip->zoned)
2200 arr[12] |= 1 << 4;
2201
2202 arr[15] = sdebug_lowest_aligned & 0xff;
2203
2204 if (have_dif_prot) {
2205 arr[12] = (sdebug_dif - 1) << 1; /* P_TYPE */
2206 arr[12] |= 1; /* PROT_EN */
2207 }
2208
2209 return fill_from_dev_buffer(scp, arr,
2210 min_t(u32, alloc_len, SDEBUG_READCAP16_ARR_SZ));
2211}
2212
2213#define SDEBUG_MAX_TGTPGS_ARR_SZ 1412
2214
2215static int resp_report_tgtpgs(struct scsi_cmnd *scp,
2216 struct sdebug_dev_info *devip)
2217{
2218 unsigned char *cmd = scp->cmnd;
2219 unsigned char *arr;
2220 int host_no = devip->sdbg_host->shost->host_no;
2221 int port_group_a, port_group_b, port_a, port_b;
2222 u32 alen, n, rlen;
2223 int ret;
2224
2225 alen = get_unaligned_be32(cmd + 6);
2226 arr = kzalloc(SDEBUG_MAX_TGTPGS_ARR_SZ, GFP_ATOMIC);
2227 if (! arr)
2228 return DID_REQUEUE << 16;
2229 /*
2230 * EVPD page 0x88 states we have two ports, one
2231 * real and a fake port with no device connected.
2232 * So we create two port groups with one port each
2233 * and set the group with port B to unavailable.
2234 */
2235 port_a = 0x1; /* relative port A */
2236 port_b = 0x2; /* relative port B */
2237 port_group_a = (((host_no + 1) & 0x7f) << 8) +
2238 (devip->channel & 0x7f);
2239 port_group_b = (((host_no + 1) & 0x7f) << 8) +
2240 (devip->channel & 0x7f) + 0x80;
2241
2242 /*
2243 * The asymmetric access state is cycled according to the host_id.
2244 */
2245 n = 4;
2246 if (sdebug_vpd_use_hostno == 0) {
2247 arr[n++] = host_no % 3; /* Asymm access state */
2248 arr[n++] = 0x0F; /* claim: all states are supported */
2249 } else {
2250 arr[n++] = 0x0; /* Active/Optimized path */
2251 arr[n++] = 0x01; /* only support active/optimized paths */
2252 }
2253 put_unaligned_be16(port_group_a, arr + n);
2254 n += 2;
2255 arr[n++] = 0; /* Reserved */
2256 arr[n++] = 0; /* Status code */
2257 arr[n++] = 0; /* Vendor unique */
2258 arr[n++] = 0x1; /* One port per group */
2259 arr[n++] = 0; /* Reserved */
2260 arr[n++] = 0; /* Reserved */
2261 put_unaligned_be16(port_a, arr + n);
2262 n += 2;
2263 arr[n++] = 3; /* Port unavailable */
2264 arr[n++] = 0x08; /* claim: only unavailalbe paths are supported */
2265 put_unaligned_be16(port_group_b, arr + n);
2266 n += 2;
2267 arr[n++] = 0; /* Reserved */
2268 arr[n++] = 0; /* Status code */
2269 arr[n++] = 0; /* Vendor unique */
2270 arr[n++] = 0x1; /* One port per group */
2271 arr[n++] = 0; /* Reserved */
2272 arr[n++] = 0; /* Reserved */
2273 put_unaligned_be16(port_b, arr + n);
2274 n += 2;
2275
2276 rlen = n - 4;
2277 put_unaligned_be32(rlen, arr + 0);
2278
2279 /*
2280 * Return the smallest value of either
2281 * - The allocated length
2282 * - The constructed command length
2283 * - The maximum array size
2284 */
2285 rlen = min(alen, n);
2286 ret = fill_from_dev_buffer(scp, arr,
2287 min_t(u32, rlen, SDEBUG_MAX_TGTPGS_ARR_SZ));
2288 kfree(arr);
2289 return ret;
2290}
2291
2292static int resp_rsup_opcodes(struct scsi_cmnd *scp,
2293 struct sdebug_dev_info *devip)
2294{
2295 bool rctd;
2296 u8 reporting_opts, req_opcode, sdeb_i, supp;
2297 u16 req_sa, u;
2298 u32 alloc_len, a_len;
2299 int k, offset, len, errsts, count, bump, na;
2300 const struct opcode_info_t *oip;
2301 const struct opcode_info_t *r_oip;
2302 u8 *arr;
2303 u8 *cmd = scp->cmnd;
2304
2305 rctd = !!(cmd[2] & 0x80);
2306 reporting_opts = cmd[2] & 0x7;
2307 req_opcode = cmd[3];
2308 req_sa = get_unaligned_be16(cmd + 4);
2309 alloc_len = get_unaligned_be32(cmd + 6);
2310 if (alloc_len < 4 || alloc_len > 0xffff) {
2311 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 6, -1);
2312 return check_condition_result;
2313 }
2314 if (alloc_len > 8192)
2315 a_len = 8192;
2316 else
2317 a_len = alloc_len;
2318 arr = kzalloc((a_len < 256) ? 320 : a_len + 64, GFP_ATOMIC);
2319 if (NULL == arr) {
2320 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
2321 INSUFF_RES_ASCQ);
2322 return check_condition_result;
2323 }
2324 switch (reporting_opts) {
2325 case 0: /* all commands */
2326 /* count number of commands */
2327 for (count = 0, oip = opcode_info_arr;
2328 oip->num_attached != 0xff; ++oip) {
2329 if (F_INV_OP & oip->flags)
2330 continue;
2331 count += (oip->num_attached + 1);
2332 }
2333 bump = rctd ? 20 : 8;
2334 put_unaligned_be32(count * bump, arr);
2335 for (offset = 4, oip = opcode_info_arr;
2336 oip->num_attached != 0xff && offset < a_len; ++oip) {
2337 if (F_INV_OP & oip->flags)
2338 continue;
2339 na = oip->num_attached;
2340 arr[offset] = oip->opcode;
2341 put_unaligned_be16(oip->sa, arr + offset + 2);
2342 if (rctd)
2343 arr[offset + 5] |= 0x2;
2344 if (FF_SA & oip->flags)
2345 arr[offset + 5] |= 0x1;
2346 put_unaligned_be16(oip->len_mask[0], arr + offset + 6);
2347 if (rctd)
2348 put_unaligned_be16(0xa, arr + offset + 8);
2349 r_oip = oip;
2350 for (k = 0, oip = oip->arrp; k < na; ++k, ++oip) {
2351 if (F_INV_OP & oip->flags)
2352 continue;
2353 offset += bump;
2354 arr[offset] = oip->opcode;
2355 put_unaligned_be16(oip->sa, arr + offset + 2);
2356 if (rctd)
2357 arr[offset + 5] |= 0x2;
2358 if (FF_SA & oip->flags)
2359 arr[offset + 5] |= 0x1;
2360 put_unaligned_be16(oip->len_mask[0],
2361 arr + offset + 6);
2362 if (rctd)
2363 put_unaligned_be16(0xa,
2364 arr + offset + 8);
2365 }
2366 oip = r_oip;
2367 offset += bump;
2368 }
2369 break;
2370 case 1: /* one command: opcode only */
2371 case 2: /* one command: opcode plus service action */
2372 case 3: /* one command: if sa==0 then opcode only else opcode+sa */
2373 sdeb_i = opcode_ind_arr[req_opcode];
2374 oip = &opcode_info_arr[sdeb_i];
2375 if (F_INV_OP & oip->flags) {
2376 supp = 1;
2377 offset = 4;
2378 } else {
2379 if (1 == reporting_opts) {
2380 if (FF_SA & oip->flags) {
2381 mk_sense_invalid_fld(scp, SDEB_IN_CDB,
2382 2, 2);
2383 kfree(arr);
2384 return check_condition_result;
2385 }
2386 req_sa = 0;
2387 } else if (2 == reporting_opts &&
2388 0 == (FF_SA & oip->flags)) {
2389 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 4, -1);
2390 kfree(arr); /* point at requested sa */
2391 return check_condition_result;
2392 }
2393 if (0 == (FF_SA & oip->flags) &&
2394 req_opcode == oip->opcode)
2395 supp = 3;
2396 else if (0 == (FF_SA & oip->flags)) {
2397 na = oip->num_attached;
2398 for (k = 0, oip = oip->arrp; k < na;
2399 ++k, ++oip) {
2400 if (req_opcode == oip->opcode)
2401 break;
2402 }
2403 supp = (k >= na) ? 1 : 3;
2404 } else if (req_sa != oip->sa) {
2405 na = oip->num_attached;
2406 for (k = 0, oip = oip->arrp; k < na;
2407 ++k, ++oip) {
2408 if (req_sa == oip->sa)
2409 break;
2410 }
2411 supp = (k >= na) ? 1 : 3;
2412 } else
2413 supp = 3;
2414 if (3 == supp) {
2415 u = oip->len_mask[0];
2416 put_unaligned_be16(u, arr + 2);
2417 arr[4] = oip->opcode;
2418 for (k = 1; k < u; ++k)
2419 arr[4 + k] = (k < 16) ?
2420 oip->len_mask[k] : 0xff;
2421 offset = 4 + u;
2422 } else
2423 offset = 4;
2424 }
2425 arr[1] = (rctd ? 0x80 : 0) | supp;
2426 if (rctd) {
2427 put_unaligned_be16(0xa, arr + offset);
2428 offset += 12;
2429 }
2430 break;
2431 default:
2432 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 2);
2433 kfree(arr);
2434 return check_condition_result;
2435 }
2436 offset = (offset < a_len) ? offset : a_len;
2437 len = (offset < alloc_len) ? offset : alloc_len;
2438 errsts = fill_from_dev_buffer(scp, arr, len);
2439 kfree(arr);
2440 return errsts;
2441}
2442
2443static int resp_rsup_tmfs(struct scsi_cmnd *scp,
2444 struct sdebug_dev_info *devip)
2445{
2446 bool repd;
2447 u32 alloc_len, len;
2448 u8 arr[16];
2449 u8 *cmd = scp->cmnd;
2450
2451 memset(arr, 0, sizeof(arr));
2452 repd = !!(cmd[2] & 0x80);
2453 alloc_len = get_unaligned_be32(cmd + 6);
2454 if (alloc_len < 4) {
2455 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 6, -1);
2456 return check_condition_result;
2457 }
2458 arr[0] = 0xc8; /* ATS | ATSS | LURS */
2459 arr[1] = 0x1; /* ITNRS */
2460 if (repd) {
2461 arr[3] = 0xc;
2462 len = 16;
2463 } else
2464 len = 4;
2465
2466 len = (len < alloc_len) ? len : alloc_len;
2467 return fill_from_dev_buffer(scp, arr, len);
2468}
2469
2470/* <<Following mode page info copied from ST318451LW>> */
2471
2472static int resp_err_recov_pg(unsigned char *p, int pcontrol, int target)
2473{ /* Read-Write Error Recovery page for mode_sense */
2474 unsigned char err_recov_pg[] = {0x1, 0xa, 0xc0, 11, 240, 0, 0, 0,
2475 5, 0, 0xff, 0xff};
2476
2477 memcpy(p, err_recov_pg, sizeof(err_recov_pg));
2478 if (1 == pcontrol)
2479 memset(p + 2, 0, sizeof(err_recov_pg) - 2);
2480 return sizeof(err_recov_pg);
2481}
2482
2483static int resp_disconnect_pg(unsigned char *p, int pcontrol, int target)
2484{ /* Disconnect-Reconnect page for mode_sense */
2485 unsigned char disconnect_pg[] = {0x2, 0xe, 128, 128, 0, 10, 0, 0,
2486 0, 0, 0, 0, 0, 0, 0, 0};
2487
2488 memcpy(p, disconnect_pg, sizeof(disconnect_pg));
2489 if (1 == pcontrol)
2490 memset(p + 2, 0, sizeof(disconnect_pg) - 2);
2491 return sizeof(disconnect_pg);
2492}
2493
2494static int resp_format_pg(unsigned char *p, int pcontrol, int target)
2495{ /* Format device page for mode_sense */
2496 unsigned char format_pg[] = {0x3, 0x16, 0, 0, 0, 0, 0, 0,
2497 0, 0, 0, 0, 0, 0, 0, 0,
2498 0, 0, 0, 0, 0x40, 0, 0, 0};
2499
2500 memcpy(p, format_pg, sizeof(format_pg));
2501 put_unaligned_be16(sdebug_sectors_per, p + 10);
2502 put_unaligned_be16(sdebug_sector_size, p + 12);
2503 if (sdebug_removable)
2504 p[20] |= 0x20; /* should agree with INQUIRY */
2505 if (1 == pcontrol)
2506 memset(p + 2, 0, sizeof(format_pg) - 2);
2507 return sizeof(format_pg);
2508}
2509
2510static unsigned char caching_pg[] = {0x8, 18, 0x14, 0, 0xff, 0xff, 0, 0,
2511 0xff, 0xff, 0xff, 0xff, 0x80, 0x14, 0, 0,
2512 0, 0, 0, 0};
2513
2514static int resp_caching_pg(unsigned char *p, int pcontrol, int target)
2515{ /* Caching page for mode_sense */
2516 unsigned char ch_caching_pg[] = {/* 0x8, 18, */ 0x4, 0, 0, 0, 0, 0,
2517 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
2518 unsigned char d_caching_pg[] = {0x8, 18, 0x14, 0, 0xff, 0xff, 0, 0,
2519 0xff, 0xff, 0xff, 0xff, 0x80, 0x14, 0, 0, 0, 0, 0, 0};
2520
2521 if (SDEBUG_OPT_N_WCE & sdebug_opts)
2522 caching_pg[2] &= ~0x4; /* set WCE=0 (default WCE=1) */
2523 memcpy(p, caching_pg, sizeof(caching_pg));
2524 if (1 == pcontrol)
2525 memcpy(p + 2, ch_caching_pg, sizeof(ch_caching_pg));
2526 else if (2 == pcontrol)
2527 memcpy(p, d_caching_pg, sizeof(d_caching_pg));
2528 return sizeof(caching_pg);
2529}
2530
2531static unsigned char ctrl_m_pg[] = {0xa, 10, 2, 0, 0, 0, 0, 0,
2532 0, 0, 0x2, 0x4b};
2533
2534static int resp_ctrl_m_pg(unsigned char *p, int pcontrol, int target)
2535{ /* Control mode page for mode_sense */
2536 unsigned char ch_ctrl_m_pg[] = {/* 0xa, 10, */ 0x6, 0, 0, 0, 0, 0,
2537 0, 0, 0, 0};
2538 unsigned char d_ctrl_m_pg[] = {0xa, 10, 2, 0, 0, 0, 0, 0,
2539 0, 0, 0x2, 0x4b};
2540
2541 if (sdebug_dsense)
2542 ctrl_m_pg[2] |= 0x4;
2543 else
2544 ctrl_m_pg[2] &= ~0x4;
2545
2546 if (sdebug_ato)
2547 ctrl_m_pg[5] |= 0x80; /* ATO=1 */
2548
2549 memcpy(p, ctrl_m_pg, sizeof(ctrl_m_pg));
2550 if (1 == pcontrol)
2551 memcpy(p + 2, ch_ctrl_m_pg, sizeof(ch_ctrl_m_pg));
2552 else if (2 == pcontrol)
2553 memcpy(p, d_ctrl_m_pg, sizeof(d_ctrl_m_pg));
2554 return sizeof(ctrl_m_pg);
2555}
2556
2557
2558static int resp_iec_m_pg(unsigned char *p, int pcontrol, int target)
2559{ /* Informational Exceptions control mode page for mode_sense */
2560 unsigned char ch_iec_m_pg[] = {/* 0x1c, 0xa, */ 0x4, 0xf, 0, 0, 0, 0,
2561 0, 0, 0x0, 0x0};
2562 unsigned char d_iec_m_pg[] = {0x1c, 0xa, 0x08, 0, 0, 0, 0, 0,
2563 0, 0, 0x0, 0x0};
2564
2565 memcpy(p, iec_m_pg, sizeof(iec_m_pg));
2566 if (1 == pcontrol)
2567 memcpy(p + 2, ch_iec_m_pg, sizeof(ch_iec_m_pg));
2568 else if (2 == pcontrol)
2569 memcpy(p, d_iec_m_pg, sizeof(d_iec_m_pg));
2570 return sizeof(iec_m_pg);
2571}
2572
2573static int resp_sas_sf_m_pg(unsigned char *p, int pcontrol, int target)
2574{ /* SAS SSP mode page - short format for mode_sense */
2575 unsigned char sas_sf_m_pg[] = {0x19, 0x6,
2576 0x6, 0x0, 0x7, 0xd0, 0x0, 0x0};
2577
2578 memcpy(p, sas_sf_m_pg, sizeof(sas_sf_m_pg));
2579 if (1 == pcontrol)
2580 memset(p + 2, 0, sizeof(sas_sf_m_pg) - 2);
2581 return sizeof(sas_sf_m_pg);
2582}
2583
2584
2585static int resp_sas_pcd_m_spg(unsigned char *p, int pcontrol, int target,
2586 int target_dev_id)
2587{ /* SAS phy control and discover mode page for mode_sense */
2588 unsigned char sas_pcd_m_pg[] = {0x59, 0x1, 0, 0x64, 0, 0x6, 0, 2,
2589 0, 0, 0, 0, 0x10, 0x9, 0x8, 0x0,
2590 0, 0, 0, 0, 0, 0, 0, 0, /* insert SAS addr */
2591 0, 0, 0, 0, 0, 0, 0, 0, /* insert SAS addr */
2592 0x2, 0, 0, 0, 0, 0, 0, 0,
2593 0x88, 0x99, 0, 0, 0, 0, 0, 0,
2594 0, 0, 0, 0, 0, 0, 0, 0,
2595 0, 1, 0, 0, 0x10, 0x9, 0x8, 0x0,
2596 0, 0, 0, 0, 0, 0, 0, 0, /* insert SAS addr */
2597 0, 0, 0, 0, 0, 0, 0, 0, /* insert SAS addr */
2598 0x3, 0, 0, 0, 0, 0, 0, 0,
2599 0x88, 0x99, 0, 0, 0, 0, 0, 0,
2600 0, 0, 0, 0, 0, 0, 0, 0,
2601 };
2602 int port_a, port_b;
2603
2604 put_unaligned_be64(naa3_comp_a, sas_pcd_m_pg + 16);
2605 put_unaligned_be64(naa3_comp_c + 1, sas_pcd_m_pg + 24);
2606 put_unaligned_be64(naa3_comp_a, sas_pcd_m_pg + 64);
2607 put_unaligned_be64(naa3_comp_c + 1, sas_pcd_m_pg + 72);
2608 port_a = target_dev_id + 1;
2609 port_b = port_a + 1;
2610 memcpy(p, sas_pcd_m_pg, sizeof(sas_pcd_m_pg));
2611 put_unaligned_be32(port_a, p + 20);
2612 put_unaligned_be32(port_b, p + 48 + 20);
2613 if (1 == pcontrol)
2614 memset(p + 4, 0, sizeof(sas_pcd_m_pg) - 4);
2615 return sizeof(sas_pcd_m_pg);
2616}
2617
2618static int resp_sas_sha_m_spg(unsigned char *p, int pcontrol)
2619{ /* SAS SSP shared protocol specific port mode subpage */
2620 unsigned char sas_sha_m_pg[] = {0x59, 0x2, 0, 0xc, 0, 0x6, 0x10, 0,
2621 0, 0, 0, 0, 0, 0, 0, 0,
2622 };
2623
2624 memcpy(p, sas_sha_m_pg, sizeof(sas_sha_m_pg));
2625 if (1 == pcontrol)
2626 memset(p + 4, 0, sizeof(sas_sha_m_pg) - 4);
2627 return sizeof(sas_sha_m_pg);
2628}
2629
2630#define SDEBUG_MAX_MSENSE_SZ 256
2631
2632static int resp_mode_sense(struct scsi_cmnd *scp,
2633 struct sdebug_dev_info *devip)
2634{
2635 int pcontrol, pcode, subpcode, bd_len;
2636 unsigned char dev_spec;
2637 u32 alloc_len, offset, len;
2638 int target_dev_id;
2639 int target = scp->device->id;
2640 unsigned char *ap;
2641 unsigned char arr[SDEBUG_MAX_MSENSE_SZ];
2642 unsigned char *cmd = scp->cmnd;
2643 bool dbd, llbaa, msense_6, is_disk, is_zbc, bad_pcode;
2644
2645 dbd = !!(cmd[1] & 0x8); /* disable block descriptors */
2646 pcontrol = (cmd[2] & 0xc0) >> 6;
2647 pcode = cmd[2] & 0x3f;
2648 subpcode = cmd[3];
2649 msense_6 = (MODE_SENSE == cmd[0]);
2650 llbaa = msense_6 ? false : !!(cmd[1] & 0x10);
2651 is_disk = (sdebug_ptype == TYPE_DISK);
2652 is_zbc = devip->zoned;
2653 if ((is_disk || is_zbc) && !dbd)
2654 bd_len = llbaa ? 16 : 8;
2655 else
2656 bd_len = 0;
2657 alloc_len = msense_6 ? cmd[4] : get_unaligned_be16(cmd + 7);
2658 memset(arr, 0, SDEBUG_MAX_MSENSE_SZ);
2659 if (0x3 == pcontrol) { /* Saving values not supported */
2660 mk_sense_buffer(scp, ILLEGAL_REQUEST, SAVING_PARAMS_UNSUP, 0);
2661 return check_condition_result;
2662 }
2663 target_dev_id = ((devip->sdbg_host->shost->host_no + 1) * 2000) +
2664 (devip->target * 1000) - 3;
2665 /* for disks+zbc set DPOFUA bit and clear write protect (WP) bit */
2666 if (is_disk || is_zbc) {
2667 dev_spec = 0x10; /* =0x90 if WP=1 implies read-only */
2668 if (sdebug_wp)
2669 dev_spec |= 0x80;
2670 } else
2671 dev_spec = 0x0;
2672 if (msense_6) {
2673 arr[2] = dev_spec;
2674 arr[3] = bd_len;
2675 offset = 4;
2676 } else {
2677 arr[3] = dev_spec;
2678 if (16 == bd_len)
2679 arr[4] = 0x1; /* set LONGLBA bit */
2680 arr[7] = bd_len; /* assume 255 or less */
2681 offset = 8;
2682 }
2683 ap = arr + offset;
2684 if ((bd_len > 0) && (!sdebug_capacity))
2685 sdebug_capacity = get_sdebug_capacity();
2686
2687 if (8 == bd_len) {
2688 if (sdebug_capacity > 0xfffffffe)
2689 put_unaligned_be32(0xffffffff, ap + 0);
2690 else
2691 put_unaligned_be32(sdebug_capacity, ap + 0);
2692 put_unaligned_be16(sdebug_sector_size, ap + 6);
2693 offset += bd_len;
2694 ap = arr + offset;
2695 } else if (16 == bd_len) {
2696 put_unaligned_be64((u64)sdebug_capacity, ap + 0);
2697 put_unaligned_be32(sdebug_sector_size, ap + 12);
2698 offset += bd_len;
2699 ap = arr + offset;
2700 }
2701
2702 if ((subpcode > 0x0) && (subpcode < 0xff) && (0x19 != pcode)) {
2703 /* TODO: Control Extension page */
2704 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1);
2705 return check_condition_result;
2706 }
2707 bad_pcode = false;
2708
2709 switch (pcode) {
2710 case 0x1: /* Read-Write error recovery page, direct access */
2711 len = resp_err_recov_pg(ap, pcontrol, target);
2712 offset += len;
2713 break;
2714 case 0x2: /* Disconnect-Reconnect page, all devices */
2715 len = resp_disconnect_pg(ap, pcontrol, target);
2716 offset += len;
2717 break;
2718 case 0x3: /* Format device page, direct access */
2719 if (is_disk) {
2720 len = resp_format_pg(ap, pcontrol, target);
2721 offset += len;
2722 } else
2723 bad_pcode = true;
2724 break;
2725 case 0x8: /* Caching page, direct access */
2726 if (is_disk || is_zbc) {
2727 len = resp_caching_pg(ap, pcontrol, target);
2728 offset += len;
2729 } else
2730 bad_pcode = true;
2731 break;
2732 case 0xa: /* Control Mode page, all devices */
2733 len = resp_ctrl_m_pg(ap, pcontrol, target);
2734 offset += len;
2735 break;
2736 case 0x19: /* if spc==1 then sas phy, control+discover */
2737 if ((subpcode > 0x2) && (subpcode < 0xff)) {
2738 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1);
2739 return check_condition_result;
2740 }
2741 len = 0;
2742 if ((0x0 == subpcode) || (0xff == subpcode))
2743 len += resp_sas_sf_m_pg(ap + len, pcontrol, target);
2744 if ((0x1 == subpcode) || (0xff == subpcode))
2745 len += resp_sas_pcd_m_spg(ap + len, pcontrol, target,
2746 target_dev_id);
2747 if ((0x2 == subpcode) || (0xff == subpcode))
2748 len += resp_sas_sha_m_spg(ap + len, pcontrol);
2749 offset += len;
2750 break;
2751 case 0x1c: /* Informational Exceptions Mode page, all devices */
2752 len = resp_iec_m_pg(ap, pcontrol, target);
2753 offset += len;
2754 break;
2755 case 0x3f: /* Read all Mode pages */
2756 if ((0 == subpcode) || (0xff == subpcode)) {
2757 len = resp_err_recov_pg(ap, pcontrol, target);
2758 len += resp_disconnect_pg(ap + len, pcontrol, target);
2759 if (is_disk) {
2760 len += resp_format_pg(ap + len, pcontrol,
2761 target);
2762 len += resp_caching_pg(ap + len, pcontrol,
2763 target);
2764 } else if (is_zbc) {
2765 len += resp_caching_pg(ap + len, pcontrol,
2766 target);
2767 }
2768 len += resp_ctrl_m_pg(ap + len, pcontrol, target);
2769 len += resp_sas_sf_m_pg(ap + len, pcontrol, target);
2770 if (0xff == subpcode) {
2771 len += resp_sas_pcd_m_spg(ap + len, pcontrol,
2772 target, target_dev_id);
2773 len += resp_sas_sha_m_spg(ap + len, pcontrol);
2774 }
2775 len += resp_iec_m_pg(ap + len, pcontrol, target);
2776 offset += len;
2777 } else {
2778 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1);
2779 return check_condition_result;
2780 }
2781 break;
2782 default:
2783 bad_pcode = true;
2784 break;
2785 }
2786 if (bad_pcode) {
2787 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 5);
2788 return check_condition_result;
2789 }
2790 if (msense_6)
2791 arr[0] = offset - 1;
2792 else
2793 put_unaligned_be16((offset - 2), arr + 0);
2794 return fill_from_dev_buffer(scp, arr, min_t(u32, alloc_len, offset));
2795}
2796
2797#define SDEBUG_MAX_MSELECT_SZ 512
2798
2799static int resp_mode_select(struct scsi_cmnd *scp,
2800 struct sdebug_dev_info *devip)
2801{
2802 int pf, sp, ps, md_len, bd_len, off, spf, pg_len;
2803 int param_len, res, mpage;
2804 unsigned char arr[SDEBUG_MAX_MSELECT_SZ];
2805 unsigned char *cmd = scp->cmnd;
2806 int mselect6 = (MODE_SELECT == cmd[0]);
2807
2808 memset(arr, 0, sizeof(arr));
2809 pf = cmd[1] & 0x10;
2810 sp = cmd[1] & 0x1;
2811 param_len = mselect6 ? cmd[4] : get_unaligned_be16(cmd + 7);
2812 if ((0 == pf) || sp || (param_len > SDEBUG_MAX_MSELECT_SZ)) {
2813 mk_sense_invalid_fld(scp, SDEB_IN_CDB, mselect6 ? 4 : 7, -1);
2814 return check_condition_result;
2815 }
2816 res = fetch_to_dev_buffer(scp, arr, param_len);
2817 if (-1 == res)
2818 return DID_ERROR << 16;
2819 else if (sdebug_verbose && (res < param_len))
2820 sdev_printk(KERN_INFO, scp->device,
2821 "%s: cdb indicated=%d, IO sent=%d bytes\n",
2822 __func__, param_len, res);
2823 md_len = mselect6 ? (arr[0] + 1) : (get_unaligned_be16(arr + 0) + 2);
2824 bd_len = mselect6 ? arr[3] : get_unaligned_be16(arr + 6);
2825 off = bd_len + (mselect6 ? 4 : 8);
2826 if (md_len > 2 || off >= res) {
2827 mk_sense_invalid_fld(scp, SDEB_IN_DATA, 0, -1);
2828 return check_condition_result;
2829 }
2830 mpage = arr[off] & 0x3f;
2831 ps = !!(arr[off] & 0x80);
2832 if (ps) {
2833 mk_sense_invalid_fld(scp, SDEB_IN_DATA, off, 7);
2834 return check_condition_result;
2835 }
2836 spf = !!(arr[off] & 0x40);
2837 pg_len = spf ? (get_unaligned_be16(arr + off + 2) + 4) :
2838 (arr[off + 1] + 2);
2839 if ((pg_len + off) > param_len) {
2840 mk_sense_buffer(scp, ILLEGAL_REQUEST,
2841 PARAMETER_LIST_LENGTH_ERR, 0);
2842 return check_condition_result;
2843 }
2844 switch (mpage) {
2845 case 0x8: /* Caching Mode page */
2846 if (caching_pg[1] == arr[off + 1]) {
2847 memcpy(caching_pg + 2, arr + off + 2,
2848 sizeof(caching_pg) - 2);
2849 goto set_mode_changed_ua;
2850 }
2851 break;
2852 case 0xa: /* Control Mode page */
2853 if (ctrl_m_pg[1] == arr[off + 1]) {
2854 memcpy(ctrl_m_pg + 2, arr + off + 2,
2855 sizeof(ctrl_m_pg) - 2);
2856 if (ctrl_m_pg[4] & 0x8)
2857 sdebug_wp = true;
2858 else
2859 sdebug_wp = false;
2860 sdebug_dsense = !!(ctrl_m_pg[2] & 0x4);
2861 goto set_mode_changed_ua;
2862 }
2863 break;
2864 case 0x1c: /* Informational Exceptions Mode page */
2865 if (iec_m_pg[1] == arr[off + 1]) {
2866 memcpy(iec_m_pg + 2, arr + off + 2,
2867 sizeof(iec_m_pg) - 2);
2868 goto set_mode_changed_ua;
2869 }
2870 break;
2871 default:
2872 break;
2873 }
2874 mk_sense_invalid_fld(scp, SDEB_IN_DATA, off, 5);
2875 return check_condition_result;
2876set_mode_changed_ua:
2877 set_bit(SDEBUG_UA_MODE_CHANGED, devip->uas_bm);
2878 return 0;
2879}
2880
2881static int resp_temp_l_pg(unsigned char *arr)
2882{
2883 unsigned char temp_l_pg[] = {0x0, 0x0, 0x3, 0x2, 0x0, 38,
2884 0x0, 0x1, 0x3, 0x2, 0x0, 65,
2885 };
2886
2887 memcpy(arr, temp_l_pg, sizeof(temp_l_pg));
2888 return sizeof(temp_l_pg);
2889}
2890
2891static int resp_ie_l_pg(unsigned char *arr)
2892{
2893 unsigned char ie_l_pg[] = {0x0, 0x0, 0x3, 0x3, 0x0, 0x0, 38,
2894 };
2895
2896 memcpy(arr, ie_l_pg, sizeof(ie_l_pg));
2897 if (iec_m_pg[2] & 0x4) { /* TEST bit set */
2898 arr[4] = THRESHOLD_EXCEEDED;
2899 arr[5] = 0xff;
2900 }
2901 return sizeof(ie_l_pg);
2902}
2903
2904static int resp_env_rep_l_spg(unsigned char *arr)
2905{
2906 unsigned char env_rep_l_spg[] = {0x0, 0x0, 0x23, 0x8,
2907 0x0, 40, 72, 0xff, 45, 18, 0, 0,
2908 0x1, 0x0, 0x23, 0x8,
2909 0x0, 55, 72, 35, 55, 45, 0, 0,
2910 };
2911
2912 memcpy(arr, env_rep_l_spg, sizeof(env_rep_l_spg));
2913 return sizeof(env_rep_l_spg);
2914}
2915
2916#define SDEBUG_MAX_LSENSE_SZ 512
2917
2918static int resp_log_sense(struct scsi_cmnd *scp,
2919 struct sdebug_dev_info *devip)
2920{
2921 int ppc, sp, pcode, subpcode;
2922 u32 alloc_len, len, n;
2923 unsigned char arr[SDEBUG_MAX_LSENSE_SZ];
2924 unsigned char *cmd = scp->cmnd;
2925
2926 memset(arr, 0, sizeof(arr));
2927 ppc = cmd[1] & 0x2;
2928 sp = cmd[1] & 0x1;
2929 if (ppc || sp) {
2930 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, ppc ? 1 : 0);
2931 return check_condition_result;
2932 }
2933 pcode = cmd[2] & 0x3f;
2934 subpcode = cmd[3] & 0xff;
2935 alloc_len = get_unaligned_be16(cmd + 7);
2936 arr[0] = pcode;
2937 if (0 == subpcode) {
2938 switch (pcode) {
2939 case 0x0: /* Supported log pages log page */
2940 n = 4;
2941 arr[n++] = 0x0; /* this page */
2942 arr[n++] = 0xd; /* Temperature */
2943 arr[n++] = 0x2f; /* Informational exceptions */
2944 arr[3] = n - 4;
2945 break;
2946 case 0xd: /* Temperature log page */
2947 arr[3] = resp_temp_l_pg(arr + 4);
2948 break;
2949 case 0x2f: /* Informational exceptions log page */
2950 arr[3] = resp_ie_l_pg(arr + 4);
2951 break;
2952 default:
2953 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 5);
2954 return check_condition_result;
2955 }
2956 } else if (0xff == subpcode) {
2957 arr[0] |= 0x40;
2958 arr[1] = subpcode;
2959 switch (pcode) {
2960 case 0x0: /* Supported log pages and subpages log page */
2961 n = 4;
2962 arr[n++] = 0x0;
2963 arr[n++] = 0x0; /* 0,0 page */
2964 arr[n++] = 0x0;
2965 arr[n++] = 0xff; /* this page */
2966 arr[n++] = 0xd;
2967 arr[n++] = 0x0; /* Temperature */
2968 arr[n++] = 0xd;
2969 arr[n++] = 0x1; /* Environment reporting */
2970 arr[n++] = 0xd;
2971 arr[n++] = 0xff; /* all 0xd subpages */
2972 arr[n++] = 0x2f;
2973 arr[n++] = 0x0; /* Informational exceptions */
2974 arr[n++] = 0x2f;
2975 arr[n++] = 0xff; /* all 0x2f subpages */
2976 arr[3] = n - 4;
2977 break;
2978 case 0xd: /* Temperature subpages */
2979 n = 4;
2980 arr[n++] = 0xd;
2981 arr[n++] = 0x0; /* Temperature */
2982 arr[n++] = 0xd;
2983 arr[n++] = 0x1; /* Environment reporting */
2984 arr[n++] = 0xd;
2985 arr[n++] = 0xff; /* these subpages */
2986 arr[3] = n - 4;
2987 break;
2988 case 0x2f: /* Informational exceptions subpages */
2989 n = 4;
2990 arr[n++] = 0x2f;
2991 arr[n++] = 0x0; /* Informational exceptions */
2992 arr[n++] = 0x2f;
2993 arr[n++] = 0xff; /* these subpages */
2994 arr[3] = n - 4;
2995 break;
2996 default:
2997 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 5);
2998 return check_condition_result;
2999 }
3000 } else if (subpcode > 0) {
3001 arr[0] |= 0x40;
3002 arr[1] = subpcode;
3003 if (pcode == 0xd && subpcode == 1)
3004 arr[3] = resp_env_rep_l_spg(arr + 4);
3005 else {
3006 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 5);
3007 return check_condition_result;
3008 }
3009 } else {
3010 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1);
3011 return check_condition_result;
3012 }
3013 len = min_t(u32, get_unaligned_be16(arr + 2) + 4, alloc_len);
3014 return fill_from_dev_buffer(scp, arr,
3015 min_t(u32, len, SDEBUG_MAX_INQ_ARR_SZ));
3016}
3017
3018static inline bool sdebug_dev_is_zoned(struct sdebug_dev_info *devip)
3019{
3020 return devip->nr_zones != 0;
3021}
3022
3023static struct sdeb_zone_state *zbc_zone(struct sdebug_dev_info *devip,
3024 unsigned long long lba)
3025{
3026 u32 zno = lba >> devip->zsize_shift;
3027 struct sdeb_zone_state *zsp;
3028
3029 if (devip->zcap == devip->zsize || zno < devip->nr_conv_zones)
3030 return &devip->zstate[zno];
3031
3032 /*
3033 * If the zone capacity is less than the zone size, adjust for gap
3034 * zones.
3035 */
3036 zno = 2 * zno - devip->nr_conv_zones;
3037 WARN_ONCE(zno >= devip->nr_zones, "%u > %u\n", zno, devip->nr_zones);
3038 zsp = &devip->zstate[zno];
3039 if (lba >= zsp->z_start + zsp->z_size)
3040 zsp++;
3041 WARN_ON_ONCE(lba >= zsp->z_start + zsp->z_size);
3042 return zsp;
3043}
3044
3045static inline bool zbc_zone_is_conv(struct sdeb_zone_state *zsp)
3046{
3047 return zsp->z_type == ZBC_ZTYPE_CNV;
3048}
3049
3050static inline bool zbc_zone_is_gap(struct sdeb_zone_state *zsp)
3051{
3052 return zsp->z_type == ZBC_ZTYPE_GAP;
3053}
3054
3055static inline bool zbc_zone_is_seq(struct sdeb_zone_state *zsp)
3056{
3057 return !zbc_zone_is_conv(zsp) && !zbc_zone_is_gap(zsp);
3058}
3059
3060static void zbc_close_zone(struct sdebug_dev_info *devip,
3061 struct sdeb_zone_state *zsp)
3062{
3063 enum sdebug_z_cond zc;
3064
3065 if (!zbc_zone_is_seq(zsp))
3066 return;
3067
3068 zc = zsp->z_cond;
3069 if (!(zc == ZC2_IMPLICIT_OPEN || zc == ZC3_EXPLICIT_OPEN))
3070 return;
3071
3072 if (zc == ZC2_IMPLICIT_OPEN)
3073 devip->nr_imp_open--;
3074 else
3075 devip->nr_exp_open--;
3076
3077 if (zsp->z_wp == zsp->z_start) {
3078 zsp->z_cond = ZC1_EMPTY;
3079 } else {
3080 zsp->z_cond = ZC4_CLOSED;
3081 devip->nr_closed++;
3082 }
3083}
3084
3085static void zbc_close_imp_open_zone(struct sdebug_dev_info *devip)
3086{
3087 struct sdeb_zone_state *zsp = &devip->zstate[0];
3088 unsigned int i;
3089
3090 for (i = 0; i < devip->nr_zones; i++, zsp++) {
3091 if (zsp->z_cond == ZC2_IMPLICIT_OPEN) {
3092 zbc_close_zone(devip, zsp);
3093 return;
3094 }
3095 }
3096}
3097
3098static void zbc_open_zone(struct sdebug_dev_info *devip,
3099 struct sdeb_zone_state *zsp, bool explicit)
3100{
3101 enum sdebug_z_cond zc;
3102
3103 if (!zbc_zone_is_seq(zsp))
3104 return;
3105
3106 zc = zsp->z_cond;
3107 if ((explicit && zc == ZC3_EXPLICIT_OPEN) ||
3108 (!explicit && zc == ZC2_IMPLICIT_OPEN))
3109 return;
3110
3111 /* Close an implicit open zone if necessary */
3112 if (explicit && zsp->z_cond == ZC2_IMPLICIT_OPEN)
3113 zbc_close_zone(devip, zsp);
3114 else if (devip->max_open &&
3115 devip->nr_imp_open + devip->nr_exp_open >= devip->max_open)
3116 zbc_close_imp_open_zone(devip);
3117
3118 if (zsp->z_cond == ZC4_CLOSED)
3119 devip->nr_closed--;
3120 if (explicit) {
3121 zsp->z_cond = ZC3_EXPLICIT_OPEN;
3122 devip->nr_exp_open++;
3123 } else {
3124 zsp->z_cond = ZC2_IMPLICIT_OPEN;
3125 devip->nr_imp_open++;
3126 }
3127}
3128
3129static inline void zbc_set_zone_full(struct sdebug_dev_info *devip,
3130 struct sdeb_zone_state *zsp)
3131{
3132 switch (zsp->z_cond) {
3133 case ZC2_IMPLICIT_OPEN:
3134 devip->nr_imp_open--;
3135 break;
3136 case ZC3_EXPLICIT_OPEN:
3137 devip->nr_exp_open--;
3138 break;
3139 default:
3140 WARN_ONCE(true, "Invalid zone %llu condition %x\n",
3141 zsp->z_start, zsp->z_cond);
3142 break;
3143 }
3144 zsp->z_cond = ZC5_FULL;
3145}
3146
3147static void zbc_inc_wp(struct sdebug_dev_info *devip,
3148 unsigned long long lba, unsigned int num)
3149{
3150 struct sdeb_zone_state *zsp = zbc_zone(devip, lba);
3151 unsigned long long n, end, zend = zsp->z_start + zsp->z_size;
3152
3153 if (!zbc_zone_is_seq(zsp))
3154 return;
3155
3156 if (zsp->z_type == ZBC_ZTYPE_SWR) {
3157 zsp->z_wp += num;
3158 if (zsp->z_wp >= zend)
3159 zbc_set_zone_full(devip, zsp);
3160 return;
3161 }
3162
3163 while (num) {
3164 if (lba != zsp->z_wp)
3165 zsp->z_non_seq_resource = true;
3166
3167 end = lba + num;
3168 if (end >= zend) {
3169 n = zend - lba;
3170 zsp->z_wp = zend;
3171 } else if (end > zsp->z_wp) {
3172 n = num;
3173 zsp->z_wp = end;
3174 } else {
3175 n = num;
3176 }
3177 if (zsp->z_wp >= zend)
3178 zbc_set_zone_full(devip, zsp);
3179
3180 num -= n;
3181 lba += n;
3182 if (num) {
3183 zsp++;
3184 zend = zsp->z_start + zsp->z_size;
3185 }
3186 }
3187}
3188
3189static int check_zbc_access_params(struct scsi_cmnd *scp,
3190 unsigned long long lba, unsigned int num, bool write)
3191{
3192 struct scsi_device *sdp = scp->device;
3193 struct sdebug_dev_info *devip = (struct sdebug_dev_info *)sdp->hostdata;
3194 struct sdeb_zone_state *zsp = zbc_zone(devip, lba);
3195 struct sdeb_zone_state *zsp_end = zbc_zone(devip, lba + num - 1);
3196
3197 if (!write) {
3198 /* For host-managed, reads cannot cross zone types boundaries */
3199 if (zsp->z_type != zsp_end->z_type) {
3200 mk_sense_buffer(scp, ILLEGAL_REQUEST,
3201 LBA_OUT_OF_RANGE,
3202 READ_INVDATA_ASCQ);
3203 return check_condition_result;
3204 }
3205 return 0;
3206 }
3207
3208 /* Writing into a gap zone is not allowed */
3209 if (zbc_zone_is_gap(zsp)) {
3210 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE,
3211 ATTEMPT_ACCESS_GAP);
3212 return check_condition_result;
3213 }
3214
3215 /* No restrictions for writes within conventional zones */
3216 if (zbc_zone_is_conv(zsp)) {
3217 if (!zbc_zone_is_conv(zsp_end)) {
3218 mk_sense_buffer(scp, ILLEGAL_REQUEST,
3219 LBA_OUT_OF_RANGE,
3220 WRITE_BOUNDARY_ASCQ);
3221 return check_condition_result;
3222 }
3223 return 0;
3224 }
3225
3226 if (zsp->z_type == ZBC_ZTYPE_SWR) {
3227 /* Writes cannot cross sequential zone boundaries */
3228 if (zsp_end != zsp) {
3229 mk_sense_buffer(scp, ILLEGAL_REQUEST,
3230 LBA_OUT_OF_RANGE,
3231 WRITE_BOUNDARY_ASCQ);
3232 return check_condition_result;
3233 }
3234 /* Cannot write full zones */
3235 if (zsp->z_cond == ZC5_FULL) {
3236 mk_sense_buffer(scp, ILLEGAL_REQUEST,
3237 INVALID_FIELD_IN_CDB, 0);
3238 return check_condition_result;
3239 }
3240 /* Writes must be aligned to the zone WP */
3241 if (lba != zsp->z_wp) {
3242 mk_sense_buffer(scp, ILLEGAL_REQUEST,
3243 LBA_OUT_OF_RANGE,
3244 UNALIGNED_WRITE_ASCQ);
3245 return check_condition_result;
3246 }
3247 }
3248
3249 /* Handle implicit open of closed and empty zones */
3250 if (zsp->z_cond == ZC1_EMPTY || zsp->z_cond == ZC4_CLOSED) {
3251 if (devip->max_open &&
3252 devip->nr_exp_open >= devip->max_open) {
3253 mk_sense_buffer(scp, DATA_PROTECT,
3254 INSUFF_RES_ASC,
3255 INSUFF_ZONE_ASCQ);
3256 return check_condition_result;
3257 }
3258 zbc_open_zone(devip, zsp, false);
3259 }
3260
3261 return 0;
3262}
3263
3264static inline int check_device_access_params
3265 (struct scsi_cmnd *scp, unsigned long long lba,
3266 unsigned int num, bool write)
3267{
3268 struct scsi_device *sdp = scp->device;
3269 struct sdebug_dev_info *devip = (struct sdebug_dev_info *)sdp->hostdata;
3270
3271 if (lba + num > sdebug_capacity) {
3272 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
3273 return check_condition_result;
3274 }
3275 /* transfer length excessive (tie in to block limits VPD page) */
3276 if (num > sdebug_store_sectors) {
3277 /* needs work to find which cdb byte 'num' comes from */
3278 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
3279 return check_condition_result;
3280 }
3281 if (write && unlikely(sdebug_wp)) {
3282 mk_sense_buffer(scp, DATA_PROTECT, WRITE_PROTECTED, 0x2);
3283 return check_condition_result;
3284 }
3285 if (sdebug_dev_is_zoned(devip))
3286 return check_zbc_access_params(scp, lba, num, write);
3287
3288 return 0;
3289}
3290
3291/*
3292 * Note: if BUG_ON() fires it usually indicates a problem with the parser
3293 * tables. Perhaps a missing F_FAKE_RW or FF_MEDIA_IO flag. Response functions
3294 * that access any of the "stores" in struct sdeb_store_info should call this
3295 * function with bug_if_fake_rw set to true.
3296 */
3297static inline struct sdeb_store_info *devip2sip(struct sdebug_dev_info *devip,
3298 bool bug_if_fake_rw)
3299{
3300 if (sdebug_fake_rw) {
3301 BUG_ON(bug_if_fake_rw); /* See note above */
3302 return NULL;
3303 }
3304 return xa_load(per_store_ap, devip->sdbg_host->si_idx);
3305}
3306
3307/* Returns number of bytes copied or -1 if error. */
3308static int do_device_access(struct sdeb_store_info *sip, struct scsi_cmnd *scp,
3309 u32 sg_skip, u64 lba, u32 num, bool do_write)
3310{
3311 int ret;
3312 u64 block, rest = 0;
3313 enum dma_data_direction dir;
3314 struct scsi_data_buffer *sdb = &scp->sdb;
3315 u8 *fsp;
3316
3317 if (do_write) {
3318 dir = DMA_TO_DEVICE;
3319 write_since_sync = true;
3320 } else {
3321 dir = DMA_FROM_DEVICE;
3322 }
3323
3324 if (!sdb->length || !sip)
3325 return 0;
3326 if (scp->sc_data_direction != dir)
3327 return -1;
3328 fsp = sip->storep;
3329
3330 block = do_div(lba, sdebug_store_sectors);
3331 if (block + num > sdebug_store_sectors)
3332 rest = block + num - sdebug_store_sectors;
3333
3334 ret = sg_copy_buffer(sdb->table.sgl, sdb->table.nents,
3335 fsp + (block * sdebug_sector_size),
3336 (num - rest) * sdebug_sector_size, sg_skip, do_write);
3337 if (ret != (num - rest) * sdebug_sector_size)
3338 return ret;
3339
3340 if (rest) {
3341 ret += sg_copy_buffer(sdb->table.sgl, sdb->table.nents,
3342 fsp, rest * sdebug_sector_size,
3343 sg_skip + ((num - rest) * sdebug_sector_size),
3344 do_write);
3345 }
3346
3347 return ret;
3348}
3349
3350/* Returns number of bytes copied or -1 if error. */
3351static int do_dout_fetch(struct scsi_cmnd *scp, u32 num, u8 *doutp)
3352{
3353 struct scsi_data_buffer *sdb = &scp->sdb;
3354
3355 if (!sdb->length)
3356 return 0;
3357 if (scp->sc_data_direction != DMA_TO_DEVICE)
3358 return -1;
3359 return sg_copy_buffer(sdb->table.sgl, sdb->table.nents, doutp,
3360 num * sdebug_sector_size, 0, true);
3361}
3362
3363/* If sip->storep+lba compares equal to arr(num), then copy top half of
3364 * arr into sip->storep+lba and return true. If comparison fails then
3365 * return false. */
3366static bool comp_write_worker(struct sdeb_store_info *sip, u64 lba, u32 num,
3367 const u8 *arr, bool compare_only)
3368{
3369 bool res;
3370 u64 block, rest = 0;
3371 u32 store_blks = sdebug_store_sectors;
3372 u32 lb_size = sdebug_sector_size;
3373 u8 *fsp = sip->storep;
3374
3375 block = do_div(lba, store_blks);
3376 if (block + num > store_blks)
3377 rest = block + num - store_blks;
3378
3379 res = !memcmp(fsp + (block * lb_size), arr, (num - rest) * lb_size);
3380 if (!res)
3381 return res;
3382 if (rest)
3383 res = memcmp(fsp, arr + ((num - rest) * lb_size),
3384 rest * lb_size);
3385 if (!res)
3386 return res;
3387 if (compare_only)
3388 return true;
3389 arr += num * lb_size;
3390 memcpy(fsp + (block * lb_size), arr, (num - rest) * lb_size);
3391 if (rest)
3392 memcpy(fsp, arr + ((num - rest) * lb_size), rest * lb_size);
3393 return res;
3394}
3395
3396static __be16 dif_compute_csum(const void *buf, int len)
3397{
3398 __be16 csum;
3399
3400 if (sdebug_guard)
3401 csum = (__force __be16)ip_compute_csum(buf, len);
3402 else
3403 csum = cpu_to_be16(crc_t10dif(buf, len));
3404
3405 return csum;
3406}
3407
3408static int dif_verify(struct t10_pi_tuple *sdt, const void *data,
3409 sector_t sector, u32 ei_lba)
3410{
3411 __be16 csum = dif_compute_csum(data, sdebug_sector_size);
3412
3413 if (sdt->guard_tag != csum) {
3414 pr_err("GUARD check failed on sector %lu rcvd 0x%04x, data 0x%04x\n",
3415 (unsigned long)sector,
3416 be16_to_cpu(sdt->guard_tag),
3417 be16_to_cpu(csum));
3418 return 0x01;
3419 }
3420 if (sdebug_dif == T10_PI_TYPE1_PROTECTION &&
3421 be32_to_cpu(sdt->ref_tag) != (sector & 0xffffffff)) {
3422 pr_err("REF check failed on sector %lu\n",
3423 (unsigned long)sector);
3424 return 0x03;
3425 }
3426 if (sdebug_dif == T10_PI_TYPE2_PROTECTION &&
3427 be32_to_cpu(sdt->ref_tag) != ei_lba) {
3428 pr_err("REF check failed on sector %lu\n",
3429 (unsigned long)sector);
3430 return 0x03;
3431 }
3432 return 0;
3433}
3434
3435static void dif_copy_prot(struct scsi_cmnd *scp, sector_t sector,
3436 unsigned int sectors, bool read)
3437{
3438 size_t resid;
3439 void *paddr;
3440 struct sdeb_store_info *sip = devip2sip((struct sdebug_dev_info *)
3441 scp->device->hostdata, true);
3442 struct t10_pi_tuple *dif_storep = sip->dif_storep;
3443 const void *dif_store_end = dif_storep + sdebug_store_sectors;
3444 struct sg_mapping_iter miter;
3445
3446 /* Bytes of protection data to copy into sgl */
3447 resid = sectors * sizeof(*dif_storep);
3448
3449 sg_miter_start(&miter, scsi_prot_sglist(scp),
3450 scsi_prot_sg_count(scp), SG_MITER_ATOMIC |
3451 (read ? SG_MITER_TO_SG : SG_MITER_FROM_SG));
3452
3453 while (sg_miter_next(&miter) && resid > 0) {
3454 size_t len = min_t(size_t, miter.length, resid);
3455 void *start = dif_store(sip, sector);
3456 size_t rest = 0;
3457
3458 if (dif_store_end < start + len)
3459 rest = start + len - dif_store_end;
3460
3461 paddr = miter.addr;
3462
3463 if (read)
3464 memcpy(paddr, start, len - rest);
3465 else
3466 memcpy(start, paddr, len - rest);
3467
3468 if (rest) {
3469 if (read)
3470 memcpy(paddr + len - rest, dif_storep, rest);
3471 else
3472 memcpy(dif_storep, paddr + len - rest, rest);
3473 }
3474
3475 sector += len / sizeof(*dif_storep);
3476 resid -= len;
3477 }
3478 sg_miter_stop(&miter);
3479}
3480
3481static int prot_verify_read(struct scsi_cmnd *scp, sector_t start_sec,
3482 unsigned int sectors, u32 ei_lba)
3483{
3484 int ret = 0;
3485 unsigned int i;
3486 sector_t sector;
3487 struct sdeb_store_info *sip = devip2sip((struct sdebug_dev_info *)
3488 scp->device->hostdata, true);
3489 struct t10_pi_tuple *sdt;
3490
3491 for (i = 0; i < sectors; i++, ei_lba++) {
3492 sector = start_sec + i;
3493 sdt = dif_store(sip, sector);
3494
3495 if (sdt->app_tag == cpu_to_be16(0xffff))
3496 continue;
3497
3498 /*
3499 * Because scsi_debug acts as both initiator and
3500 * target we proceed to verify the PI even if
3501 * RDPROTECT=3. This is done so the "initiator" knows
3502 * which type of error to return. Otherwise we would
3503 * have to iterate over the PI twice.
3504 */
3505 if (scp->cmnd[1] >> 5) { /* RDPROTECT */
3506 ret = dif_verify(sdt, lba2fake_store(sip, sector),
3507 sector, ei_lba);
3508 if (ret) {
3509 dif_errors++;
3510 break;
3511 }
3512 }
3513 }
3514
3515 dif_copy_prot(scp, start_sec, sectors, true);
3516 dix_reads++;
3517
3518 return ret;
3519}
3520
3521static inline void
3522sdeb_read_lock(struct sdeb_store_info *sip)
3523{
3524 if (sdebug_no_rwlock) {
3525 if (sip)
3526 __acquire(&sip->macc_lck);
3527 else
3528 __acquire(&sdeb_fake_rw_lck);
3529 } else {
3530 if (sip)
3531 read_lock(&sip->macc_lck);
3532 else
3533 read_lock(&sdeb_fake_rw_lck);
3534 }
3535}
3536
3537static inline void
3538sdeb_read_unlock(struct sdeb_store_info *sip)
3539{
3540 if (sdebug_no_rwlock) {
3541 if (sip)
3542 __release(&sip->macc_lck);
3543 else
3544 __release(&sdeb_fake_rw_lck);
3545 } else {
3546 if (sip)
3547 read_unlock(&sip->macc_lck);
3548 else
3549 read_unlock(&sdeb_fake_rw_lck);
3550 }
3551}
3552
3553static inline void
3554sdeb_write_lock(struct sdeb_store_info *sip)
3555{
3556 if (sdebug_no_rwlock) {
3557 if (sip)
3558 __acquire(&sip->macc_lck);
3559 else
3560 __acquire(&sdeb_fake_rw_lck);
3561 } else {
3562 if (sip)
3563 write_lock(&sip->macc_lck);
3564 else
3565 write_lock(&sdeb_fake_rw_lck);
3566 }
3567}
3568
3569static inline void
3570sdeb_write_unlock(struct sdeb_store_info *sip)
3571{
3572 if (sdebug_no_rwlock) {
3573 if (sip)
3574 __release(&sip->macc_lck);
3575 else
3576 __release(&sdeb_fake_rw_lck);
3577 } else {
3578 if (sip)
3579 write_unlock(&sip->macc_lck);
3580 else
3581 write_unlock(&sdeb_fake_rw_lck);
3582 }
3583}
3584
3585static int resp_read_dt0(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
3586{
3587 bool check_prot;
3588 u32 num;
3589 u32 ei_lba;
3590 int ret;
3591 u64 lba;
3592 struct sdeb_store_info *sip = devip2sip(devip, true);
3593 u8 *cmd = scp->cmnd;
3594
3595 switch (cmd[0]) {
3596 case READ_16:
3597 ei_lba = 0;
3598 lba = get_unaligned_be64(cmd + 2);
3599 num = get_unaligned_be32(cmd + 10);
3600 check_prot = true;
3601 break;
3602 case READ_10:
3603 ei_lba = 0;
3604 lba = get_unaligned_be32(cmd + 2);
3605 num = get_unaligned_be16(cmd + 7);
3606 check_prot = true;
3607 break;
3608 case READ_6:
3609 ei_lba = 0;
3610 lba = (u32)cmd[3] | (u32)cmd[2] << 8 |
3611 (u32)(cmd[1] & 0x1f) << 16;
3612 num = (0 == cmd[4]) ? 256 : cmd[4];
3613 check_prot = true;
3614 break;
3615 case READ_12:
3616 ei_lba = 0;
3617 lba = get_unaligned_be32(cmd + 2);
3618 num = get_unaligned_be32(cmd + 6);
3619 check_prot = true;
3620 break;
3621 case XDWRITEREAD_10:
3622 ei_lba = 0;
3623 lba = get_unaligned_be32(cmd + 2);
3624 num = get_unaligned_be16(cmd + 7);
3625 check_prot = false;
3626 break;
3627 default: /* assume READ(32) */
3628 lba = get_unaligned_be64(cmd + 12);
3629 ei_lba = get_unaligned_be32(cmd + 20);
3630 num = get_unaligned_be32(cmd + 28);
3631 check_prot = false;
3632 break;
3633 }
3634 if (unlikely(have_dif_prot && check_prot)) {
3635 if (sdebug_dif == T10_PI_TYPE2_PROTECTION &&
3636 (cmd[1] & 0xe0)) {
3637 mk_sense_invalid_opcode(scp);
3638 return check_condition_result;
3639 }
3640 if ((sdebug_dif == T10_PI_TYPE1_PROTECTION ||
3641 sdebug_dif == T10_PI_TYPE3_PROTECTION) &&
3642 (cmd[1] & 0xe0) == 0)
3643 sdev_printk(KERN_ERR, scp->device, "Unprotected RD "
3644 "to DIF device\n");
3645 }
3646 if (unlikely((sdebug_opts & SDEBUG_OPT_SHORT_TRANSFER) &&
3647 atomic_read(&sdeb_inject_pending))) {
3648 num /= 2;
3649 atomic_set(&sdeb_inject_pending, 0);
3650 }
3651
3652 ret = check_device_access_params(scp, lba, num, false);
3653 if (ret)
3654 return ret;
3655 if (unlikely((SDEBUG_OPT_MEDIUM_ERR & sdebug_opts) &&
3656 (lba <= (sdebug_medium_error_start + sdebug_medium_error_count - 1)) &&
3657 ((lba + num) > sdebug_medium_error_start))) {
3658 /* claim unrecoverable read error */
3659 mk_sense_buffer(scp, MEDIUM_ERROR, UNRECOVERED_READ_ERR, 0);
3660 /* set info field and valid bit for fixed descriptor */
3661 if (0x70 == (scp->sense_buffer[0] & 0x7f)) {
3662 scp->sense_buffer[0] |= 0x80; /* Valid bit */
3663 ret = (lba < OPT_MEDIUM_ERR_ADDR)
3664 ? OPT_MEDIUM_ERR_ADDR : (int)lba;
3665 put_unaligned_be32(ret, scp->sense_buffer + 3);
3666 }
3667 scsi_set_resid(scp, scsi_bufflen(scp));
3668 return check_condition_result;
3669 }
3670
3671 sdeb_read_lock(sip);
3672
3673 /* DIX + T10 DIF */
3674 if (unlikely(sdebug_dix && scsi_prot_sg_count(scp))) {
3675 switch (prot_verify_read(scp, lba, num, ei_lba)) {
3676 case 1: /* Guard tag error */
3677 if (cmd[1] >> 5 != 3) { /* RDPROTECT != 3 */
3678 sdeb_read_unlock(sip);
3679 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 1);
3680 return check_condition_result;
3681 } else if (scp->prot_flags & SCSI_PROT_GUARD_CHECK) {
3682 sdeb_read_unlock(sip);
3683 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 1);
3684 return illegal_condition_result;
3685 }
3686 break;
3687 case 3: /* Reference tag error */
3688 if (cmd[1] >> 5 != 3) { /* RDPROTECT != 3 */
3689 sdeb_read_unlock(sip);
3690 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 3);
3691 return check_condition_result;
3692 } else if (scp->prot_flags & SCSI_PROT_REF_CHECK) {
3693 sdeb_read_unlock(sip);
3694 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 3);
3695 return illegal_condition_result;
3696 }
3697 break;
3698 }
3699 }
3700
3701 ret = do_device_access(sip, scp, 0, lba, num, false);
3702 sdeb_read_unlock(sip);
3703 if (unlikely(ret == -1))
3704 return DID_ERROR << 16;
3705
3706 scsi_set_resid(scp, scsi_bufflen(scp) - ret);
3707
3708 if (unlikely((sdebug_opts & SDEBUG_OPT_RECOV_DIF_DIX) &&
3709 atomic_read(&sdeb_inject_pending))) {
3710 if (sdebug_opts & SDEBUG_OPT_RECOVERED_ERR) {
3711 mk_sense_buffer(scp, RECOVERED_ERROR, THRESHOLD_EXCEEDED, 0);
3712 atomic_set(&sdeb_inject_pending, 0);
3713 return check_condition_result;
3714 } else if (sdebug_opts & SDEBUG_OPT_DIF_ERR) {
3715 /* Logical block guard check failed */
3716 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 1);
3717 atomic_set(&sdeb_inject_pending, 0);
3718 return illegal_condition_result;
3719 } else if (SDEBUG_OPT_DIX_ERR & sdebug_opts) {
3720 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 1);
3721 atomic_set(&sdeb_inject_pending, 0);
3722 return illegal_condition_result;
3723 }
3724 }
3725 return 0;
3726}
3727
3728static int prot_verify_write(struct scsi_cmnd *SCpnt, sector_t start_sec,
3729 unsigned int sectors, u32 ei_lba)
3730{
3731 int ret;
3732 struct t10_pi_tuple *sdt;
3733 void *daddr;
3734 sector_t sector = start_sec;
3735 int ppage_offset;
3736 int dpage_offset;
3737 struct sg_mapping_iter diter;
3738 struct sg_mapping_iter piter;
3739
3740 BUG_ON(scsi_sg_count(SCpnt) == 0);
3741 BUG_ON(scsi_prot_sg_count(SCpnt) == 0);
3742
3743 sg_miter_start(&piter, scsi_prot_sglist(SCpnt),
3744 scsi_prot_sg_count(SCpnt),
3745 SG_MITER_ATOMIC | SG_MITER_FROM_SG);
3746 sg_miter_start(&diter, scsi_sglist(SCpnt), scsi_sg_count(SCpnt),
3747 SG_MITER_ATOMIC | SG_MITER_FROM_SG);
3748
3749 /* For each protection page */
3750 while (sg_miter_next(&piter)) {
3751 dpage_offset = 0;
3752 if (WARN_ON(!sg_miter_next(&diter))) {
3753 ret = 0x01;
3754 goto out;
3755 }
3756
3757 for (ppage_offset = 0; ppage_offset < piter.length;
3758 ppage_offset += sizeof(struct t10_pi_tuple)) {
3759 /* If we're at the end of the current
3760 * data page advance to the next one
3761 */
3762 if (dpage_offset >= diter.length) {
3763 if (WARN_ON(!sg_miter_next(&diter))) {
3764 ret = 0x01;
3765 goto out;
3766 }
3767 dpage_offset = 0;
3768 }
3769
3770 sdt = piter.addr + ppage_offset;
3771 daddr = diter.addr + dpage_offset;
3772
3773 if (SCpnt->cmnd[1] >> 5 != 3) { /* WRPROTECT */
3774 ret = dif_verify(sdt, daddr, sector, ei_lba);
3775 if (ret)
3776 goto out;
3777 }
3778
3779 sector++;
3780 ei_lba++;
3781 dpage_offset += sdebug_sector_size;
3782 }
3783 diter.consumed = dpage_offset;
3784 sg_miter_stop(&diter);
3785 }
3786 sg_miter_stop(&piter);
3787
3788 dif_copy_prot(SCpnt, start_sec, sectors, false);
3789 dix_writes++;
3790
3791 return 0;
3792
3793out:
3794 dif_errors++;
3795 sg_miter_stop(&diter);
3796 sg_miter_stop(&piter);
3797 return ret;
3798}
3799
3800static unsigned long lba_to_map_index(sector_t lba)
3801{
3802 if (sdebug_unmap_alignment)
3803 lba += sdebug_unmap_granularity - sdebug_unmap_alignment;
3804 sector_div(lba, sdebug_unmap_granularity);
3805 return lba;
3806}
3807
3808static sector_t map_index_to_lba(unsigned long index)
3809{
3810 sector_t lba = index * sdebug_unmap_granularity;
3811
3812 if (sdebug_unmap_alignment)
3813 lba -= sdebug_unmap_granularity - sdebug_unmap_alignment;
3814 return lba;
3815}
3816
3817static unsigned int map_state(struct sdeb_store_info *sip, sector_t lba,
3818 unsigned int *num)
3819{
3820 sector_t end;
3821 unsigned int mapped;
3822 unsigned long index;
3823 unsigned long next;
3824
3825 index = lba_to_map_index(lba);
3826 mapped = test_bit(index, sip->map_storep);
3827
3828 if (mapped)
3829 next = find_next_zero_bit(sip->map_storep, map_size, index);
3830 else
3831 next = find_next_bit(sip->map_storep, map_size, index);
3832
3833 end = min_t(sector_t, sdebug_store_sectors, map_index_to_lba(next));
3834 *num = end - lba;
3835 return mapped;
3836}
3837
3838static void map_region(struct sdeb_store_info *sip, sector_t lba,
3839 unsigned int len)
3840{
3841 sector_t end = lba + len;
3842
3843 while (lba < end) {
3844 unsigned long index = lba_to_map_index(lba);
3845
3846 if (index < map_size)
3847 set_bit(index, sip->map_storep);
3848
3849 lba = map_index_to_lba(index + 1);
3850 }
3851}
3852
3853static void unmap_region(struct sdeb_store_info *sip, sector_t lba,
3854 unsigned int len)
3855{
3856 sector_t end = lba + len;
3857 u8 *fsp = sip->storep;
3858
3859 while (lba < end) {
3860 unsigned long index = lba_to_map_index(lba);
3861
3862 if (lba == map_index_to_lba(index) &&
3863 lba + sdebug_unmap_granularity <= end &&
3864 index < map_size) {
3865 clear_bit(index, sip->map_storep);
3866 if (sdebug_lbprz) { /* for LBPRZ=2 return 0xff_s */
3867 memset(fsp + lba * sdebug_sector_size,
3868 (sdebug_lbprz & 1) ? 0 : 0xff,
3869 sdebug_sector_size *
3870 sdebug_unmap_granularity);
3871 }
3872 if (sip->dif_storep) {
3873 memset(sip->dif_storep + lba, 0xff,
3874 sizeof(*sip->dif_storep) *
3875 sdebug_unmap_granularity);
3876 }
3877 }
3878 lba = map_index_to_lba(index + 1);
3879 }
3880}
3881
3882static int resp_write_dt0(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
3883{
3884 bool check_prot;
3885 u32 num;
3886 u32 ei_lba;
3887 int ret;
3888 u64 lba;
3889 struct sdeb_store_info *sip = devip2sip(devip, true);
3890 u8 *cmd = scp->cmnd;
3891
3892 switch (cmd[0]) {
3893 case WRITE_16:
3894 ei_lba = 0;
3895 lba = get_unaligned_be64(cmd + 2);
3896 num = get_unaligned_be32(cmd + 10);
3897 check_prot = true;
3898 break;
3899 case WRITE_10:
3900 ei_lba = 0;
3901 lba = get_unaligned_be32(cmd + 2);
3902 num = get_unaligned_be16(cmd + 7);
3903 check_prot = true;
3904 break;
3905 case WRITE_6:
3906 ei_lba = 0;
3907 lba = (u32)cmd[3] | (u32)cmd[2] << 8 |
3908 (u32)(cmd[1] & 0x1f) << 16;
3909 num = (0 == cmd[4]) ? 256 : cmd[4];
3910 check_prot = true;
3911 break;
3912 case WRITE_12:
3913 ei_lba = 0;
3914 lba = get_unaligned_be32(cmd + 2);
3915 num = get_unaligned_be32(cmd + 6);
3916 check_prot = true;
3917 break;
3918 case 0x53: /* XDWRITEREAD(10) */
3919 ei_lba = 0;
3920 lba = get_unaligned_be32(cmd + 2);
3921 num = get_unaligned_be16(cmd + 7);
3922 check_prot = false;
3923 break;
3924 default: /* assume WRITE(32) */
3925 lba = get_unaligned_be64(cmd + 12);
3926 ei_lba = get_unaligned_be32(cmd + 20);
3927 num = get_unaligned_be32(cmd + 28);
3928 check_prot = false;
3929 break;
3930 }
3931 if (unlikely(have_dif_prot && check_prot)) {
3932 if (sdebug_dif == T10_PI_TYPE2_PROTECTION &&
3933 (cmd[1] & 0xe0)) {
3934 mk_sense_invalid_opcode(scp);
3935 return check_condition_result;
3936 }
3937 if ((sdebug_dif == T10_PI_TYPE1_PROTECTION ||
3938 sdebug_dif == T10_PI_TYPE3_PROTECTION) &&
3939 (cmd[1] & 0xe0) == 0)
3940 sdev_printk(KERN_ERR, scp->device, "Unprotected WR "
3941 "to DIF device\n");
3942 }
3943
3944 sdeb_write_lock(sip);
3945 ret = check_device_access_params(scp, lba, num, true);
3946 if (ret) {
3947 sdeb_write_unlock(sip);
3948 return ret;
3949 }
3950
3951 /* DIX + T10 DIF */
3952 if (unlikely(sdebug_dix && scsi_prot_sg_count(scp))) {
3953 switch (prot_verify_write(scp, lba, num, ei_lba)) {
3954 case 1: /* Guard tag error */
3955 if (scp->prot_flags & SCSI_PROT_GUARD_CHECK) {
3956 sdeb_write_unlock(sip);
3957 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 1);
3958 return illegal_condition_result;
3959 } else if (scp->cmnd[1] >> 5 != 3) { /* WRPROTECT != 3 */
3960 sdeb_write_unlock(sip);
3961 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 1);
3962 return check_condition_result;
3963 }
3964 break;
3965 case 3: /* Reference tag error */
3966 if (scp->prot_flags & SCSI_PROT_REF_CHECK) {
3967 sdeb_write_unlock(sip);
3968 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 3);
3969 return illegal_condition_result;
3970 } else if (scp->cmnd[1] >> 5 != 3) { /* WRPROTECT != 3 */
3971 sdeb_write_unlock(sip);
3972 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 3);
3973 return check_condition_result;
3974 }
3975 break;
3976 }
3977 }
3978
3979 ret = do_device_access(sip, scp, 0, lba, num, true);
3980 if (unlikely(scsi_debug_lbp()))
3981 map_region(sip, lba, num);
3982 /* If ZBC zone then bump its write pointer */
3983 if (sdebug_dev_is_zoned(devip))
3984 zbc_inc_wp(devip, lba, num);
3985 sdeb_write_unlock(sip);
3986 if (unlikely(-1 == ret))
3987 return DID_ERROR << 16;
3988 else if (unlikely(sdebug_verbose &&
3989 (ret < (num * sdebug_sector_size))))
3990 sdev_printk(KERN_INFO, scp->device,
3991 "%s: write: cdb indicated=%u, IO sent=%d bytes\n",
3992 my_name, num * sdebug_sector_size, ret);
3993
3994 if (unlikely((sdebug_opts & SDEBUG_OPT_RECOV_DIF_DIX) &&
3995 atomic_read(&sdeb_inject_pending))) {
3996 if (sdebug_opts & SDEBUG_OPT_RECOVERED_ERR) {
3997 mk_sense_buffer(scp, RECOVERED_ERROR, THRESHOLD_EXCEEDED, 0);
3998 atomic_set(&sdeb_inject_pending, 0);
3999 return check_condition_result;
4000 } else if (sdebug_opts & SDEBUG_OPT_DIF_ERR) {
4001 /* Logical block guard check failed */
4002 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 1);
4003 atomic_set(&sdeb_inject_pending, 0);
4004 return illegal_condition_result;
4005 } else if (sdebug_opts & SDEBUG_OPT_DIX_ERR) {
4006 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 1);
4007 atomic_set(&sdeb_inject_pending, 0);
4008 return illegal_condition_result;
4009 }
4010 }
4011 return 0;
4012}
4013
4014/*
4015 * T10 has only specified WRITE SCATTERED(16) and WRITE SCATTERED(32).
4016 * No READ GATHERED yet (requires bidi or long cdb holding gather list).
4017 */
4018static int resp_write_scat(struct scsi_cmnd *scp,
4019 struct sdebug_dev_info *devip)
4020{
4021 u8 *cmd = scp->cmnd;
4022 u8 *lrdp = NULL;
4023 u8 *up;
4024 struct sdeb_store_info *sip = devip2sip(devip, true);
4025 u8 wrprotect;
4026 u16 lbdof, num_lrd, k;
4027 u32 num, num_by, bt_len, lbdof_blen, sg_off, cum_lb;
4028 u32 lb_size = sdebug_sector_size;
4029 u32 ei_lba;
4030 u64 lba;
4031 int ret, res;
4032 bool is_16;
4033 static const u32 lrd_size = 32; /* + parameter list header size */
4034
4035 if (cmd[0] == VARIABLE_LENGTH_CMD) {
4036 is_16 = false;
4037 wrprotect = (cmd[10] >> 5) & 0x7;
4038 lbdof = get_unaligned_be16(cmd + 12);
4039 num_lrd = get_unaligned_be16(cmd + 16);
4040 bt_len = get_unaligned_be32(cmd + 28);
4041 } else { /* that leaves WRITE SCATTERED(16) */
4042 is_16 = true;
4043 wrprotect = (cmd[2] >> 5) & 0x7;
4044 lbdof = get_unaligned_be16(cmd + 4);
4045 num_lrd = get_unaligned_be16(cmd + 8);
4046 bt_len = get_unaligned_be32(cmd + 10);
4047 if (unlikely(have_dif_prot)) {
4048 if (sdebug_dif == T10_PI_TYPE2_PROTECTION &&
4049 wrprotect) {
4050 mk_sense_invalid_opcode(scp);
4051 return illegal_condition_result;
4052 }
4053 if ((sdebug_dif == T10_PI_TYPE1_PROTECTION ||
4054 sdebug_dif == T10_PI_TYPE3_PROTECTION) &&
4055 wrprotect == 0)
4056 sdev_printk(KERN_ERR, scp->device,
4057 "Unprotected WR to DIF device\n");
4058 }
4059 }
4060 if ((num_lrd == 0) || (bt_len == 0))
4061 return 0; /* T10 says these do-nothings are not errors */
4062 if (lbdof == 0) {
4063 if (sdebug_verbose)
4064 sdev_printk(KERN_INFO, scp->device,
4065 "%s: %s: LB Data Offset field bad\n",
4066 my_name, __func__);
4067 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
4068 return illegal_condition_result;
4069 }
4070 lbdof_blen = lbdof * lb_size;
4071 if ((lrd_size + (num_lrd * lrd_size)) > lbdof_blen) {
4072 if (sdebug_verbose)
4073 sdev_printk(KERN_INFO, scp->device,
4074 "%s: %s: LBA range descriptors don't fit\n",
4075 my_name, __func__);
4076 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
4077 return illegal_condition_result;
4078 }
4079 lrdp = kzalloc(lbdof_blen, GFP_ATOMIC | __GFP_NOWARN);
4080 if (lrdp == NULL)
4081 return SCSI_MLQUEUE_HOST_BUSY;
4082 if (sdebug_verbose)
4083 sdev_printk(KERN_INFO, scp->device,
4084 "%s: %s: Fetch header+scatter_list, lbdof_blen=%u\n",
4085 my_name, __func__, lbdof_blen);
4086 res = fetch_to_dev_buffer(scp, lrdp, lbdof_blen);
4087 if (res == -1) {
4088 ret = DID_ERROR << 16;
4089 goto err_out;
4090 }
4091
4092 sdeb_write_lock(sip);
4093 sg_off = lbdof_blen;
4094 /* Spec says Buffer xfer Length field in number of LBs in dout */
4095 cum_lb = 0;
4096 for (k = 0, up = lrdp + lrd_size; k < num_lrd; ++k, up += lrd_size) {
4097 lba = get_unaligned_be64(up + 0);
4098 num = get_unaligned_be32(up + 8);
4099 if (sdebug_verbose)
4100 sdev_printk(KERN_INFO, scp->device,
4101 "%s: %s: k=%d LBA=0x%llx num=%u sg_off=%u\n",
4102 my_name, __func__, k, lba, num, sg_off);
4103 if (num == 0)
4104 continue;
4105 ret = check_device_access_params(scp, lba, num, true);
4106 if (ret)
4107 goto err_out_unlock;
4108 num_by = num * lb_size;
4109 ei_lba = is_16 ? 0 : get_unaligned_be32(up + 12);
4110
4111 if ((cum_lb + num) > bt_len) {
4112 if (sdebug_verbose)
4113 sdev_printk(KERN_INFO, scp->device,
4114 "%s: %s: sum of blocks > data provided\n",
4115 my_name, __func__);
4116 mk_sense_buffer(scp, ILLEGAL_REQUEST, WRITE_ERROR_ASC,
4117 0);
4118 ret = illegal_condition_result;
4119 goto err_out_unlock;
4120 }
4121
4122 /* DIX + T10 DIF */
4123 if (unlikely(sdebug_dix && scsi_prot_sg_count(scp))) {
4124 int prot_ret = prot_verify_write(scp, lba, num,
4125 ei_lba);
4126
4127 if (prot_ret) {
4128 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10,
4129 prot_ret);
4130 ret = illegal_condition_result;
4131 goto err_out_unlock;
4132 }
4133 }
4134
4135 ret = do_device_access(sip, scp, sg_off, lba, num, true);
4136 /* If ZBC zone then bump its write pointer */
4137 if (sdebug_dev_is_zoned(devip))
4138 zbc_inc_wp(devip, lba, num);
4139 if (unlikely(scsi_debug_lbp()))
4140 map_region(sip, lba, num);
4141 if (unlikely(-1 == ret)) {
4142 ret = DID_ERROR << 16;
4143 goto err_out_unlock;
4144 } else if (unlikely(sdebug_verbose && (ret < num_by)))
4145 sdev_printk(KERN_INFO, scp->device,
4146 "%s: write: cdb indicated=%u, IO sent=%d bytes\n",
4147 my_name, num_by, ret);
4148
4149 if (unlikely((sdebug_opts & SDEBUG_OPT_RECOV_DIF_DIX) &&
4150 atomic_read(&sdeb_inject_pending))) {
4151 if (sdebug_opts & SDEBUG_OPT_RECOVERED_ERR) {
4152 mk_sense_buffer(scp, RECOVERED_ERROR, THRESHOLD_EXCEEDED, 0);
4153 atomic_set(&sdeb_inject_pending, 0);
4154 ret = check_condition_result;
4155 goto err_out_unlock;
4156 } else if (sdebug_opts & SDEBUG_OPT_DIF_ERR) {
4157 /* Logical block guard check failed */
4158 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 1);
4159 atomic_set(&sdeb_inject_pending, 0);
4160 ret = illegal_condition_result;
4161 goto err_out_unlock;
4162 } else if (sdebug_opts & SDEBUG_OPT_DIX_ERR) {
4163 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 1);
4164 atomic_set(&sdeb_inject_pending, 0);
4165 ret = illegal_condition_result;
4166 goto err_out_unlock;
4167 }
4168 }
4169 sg_off += num_by;
4170 cum_lb += num;
4171 }
4172 ret = 0;
4173err_out_unlock:
4174 sdeb_write_unlock(sip);
4175err_out:
4176 kfree(lrdp);
4177 return ret;
4178}
4179
4180static int resp_write_same(struct scsi_cmnd *scp, u64 lba, u32 num,
4181 u32 ei_lba, bool unmap, bool ndob)
4182{
4183 struct scsi_device *sdp = scp->device;
4184 struct sdebug_dev_info *devip = (struct sdebug_dev_info *)sdp->hostdata;
4185 unsigned long long i;
4186 u64 block, lbaa;
4187 u32 lb_size = sdebug_sector_size;
4188 int ret;
4189 struct sdeb_store_info *sip = devip2sip((struct sdebug_dev_info *)
4190 scp->device->hostdata, true);
4191 u8 *fs1p;
4192 u8 *fsp;
4193
4194 sdeb_write_lock(sip);
4195
4196 ret = check_device_access_params(scp, lba, num, true);
4197 if (ret) {
4198 sdeb_write_unlock(sip);
4199 return ret;
4200 }
4201
4202 if (unmap && scsi_debug_lbp()) {
4203 unmap_region(sip, lba, num);
4204 goto out;
4205 }
4206 lbaa = lba;
4207 block = do_div(lbaa, sdebug_store_sectors);
4208 /* if ndob then zero 1 logical block, else fetch 1 logical block */
4209 fsp = sip->storep;
4210 fs1p = fsp + (block * lb_size);
4211 if (ndob) {
4212 memset(fs1p, 0, lb_size);
4213 ret = 0;
4214 } else
4215 ret = fetch_to_dev_buffer(scp, fs1p, lb_size);
4216
4217 if (-1 == ret) {
4218 sdeb_write_unlock(sip);
4219 return DID_ERROR << 16;
4220 } else if (sdebug_verbose && !ndob && (ret < lb_size))
4221 sdev_printk(KERN_INFO, scp->device,
4222 "%s: %s: lb size=%u, IO sent=%d bytes\n",
4223 my_name, "write same", lb_size, ret);
4224
4225 /* Copy first sector to remaining blocks */
4226 for (i = 1 ; i < num ; i++) {
4227 lbaa = lba + i;
4228 block = do_div(lbaa, sdebug_store_sectors);
4229 memmove(fsp + (block * lb_size), fs1p, lb_size);
4230 }
4231 if (scsi_debug_lbp())
4232 map_region(sip, lba, num);
4233 /* If ZBC zone then bump its write pointer */
4234 if (sdebug_dev_is_zoned(devip))
4235 zbc_inc_wp(devip, lba, num);
4236out:
4237 sdeb_write_unlock(sip);
4238
4239 return 0;
4240}
4241
4242static int resp_write_same_10(struct scsi_cmnd *scp,
4243 struct sdebug_dev_info *devip)
4244{
4245 u8 *cmd = scp->cmnd;
4246 u32 lba;
4247 u16 num;
4248 u32 ei_lba = 0;
4249 bool unmap = false;
4250
4251 if (cmd[1] & 0x8) {
4252 if (sdebug_lbpws10 == 0) {
4253 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 3);
4254 return check_condition_result;
4255 } else
4256 unmap = true;
4257 }
4258 lba = get_unaligned_be32(cmd + 2);
4259 num = get_unaligned_be16(cmd + 7);
4260 if (num > sdebug_write_same_length) {
4261 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 7, -1);
4262 return check_condition_result;
4263 }
4264 return resp_write_same(scp, lba, num, ei_lba, unmap, false);
4265}
4266
4267static int resp_write_same_16(struct scsi_cmnd *scp,
4268 struct sdebug_dev_info *devip)
4269{
4270 u8 *cmd = scp->cmnd;
4271 u64 lba;
4272 u32 num;
4273 u32 ei_lba = 0;
4274 bool unmap = false;
4275 bool ndob = false;
4276
4277 if (cmd[1] & 0x8) { /* UNMAP */
4278 if (sdebug_lbpws == 0) {
4279 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 3);
4280 return check_condition_result;
4281 } else
4282 unmap = true;
4283 }
4284 if (cmd[1] & 0x1) /* NDOB (no data-out buffer, assumes zeroes) */
4285 ndob = true;
4286 lba = get_unaligned_be64(cmd + 2);
4287 num = get_unaligned_be32(cmd + 10);
4288 if (num > sdebug_write_same_length) {
4289 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 10, -1);
4290 return check_condition_result;
4291 }
4292 return resp_write_same(scp, lba, num, ei_lba, unmap, ndob);
4293}
4294
4295/* Note the mode field is in the same position as the (lower) service action
4296 * field. For the Report supported operation codes command, SPC-4 suggests
4297 * each mode of this command should be reported separately; for future. */
4298static int resp_write_buffer(struct scsi_cmnd *scp,
4299 struct sdebug_dev_info *devip)
4300{
4301 u8 *cmd = scp->cmnd;
4302 struct scsi_device *sdp = scp->device;
4303 struct sdebug_dev_info *dp;
4304 u8 mode;
4305
4306 mode = cmd[1] & 0x1f;
4307 switch (mode) {
4308 case 0x4: /* download microcode (MC) and activate (ACT) */
4309 /* set UAs on this device only */
4310 set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm);
4311 set_bit(SDEBUG_UA_MICROCODE_CHANGED, devip->uas_bm);
4312 break;
4313 case 0x5: /* download MC, save and ACT */
4314 set_bit(SDEBUG_UA_MICROCODE_CHANGED_WO_RESET, devip->uas_bm);
4315 break;
4316 case 0x6: /* download MC with offsets and ACT */
4317 /* set UAs on most devices (LUs) in this target */
4318 list_for_each_entry(dp,
4319 &devip->sdbg_host->dev_info_list,
4320 dev_list)
4321 if (dp->target == sdp->id) {
4322 set_bit(SDEBUG_UA_BUS_RESET, dp->uas_bm);
4323 if (devip != dp)
4324 set_bit(SDEBUG_UA_MICROCODE_CHANGED,
4325 dp->uas_bm);
4326 }
4327 break;
4328 case 0x7: /* download MC with offsets, save, and ACT */
4329 /* set UA on all devices (LUs) in this target */
4330 list_for_each_entry(dp,
4331 &devip->sdbg_host->dev_info_list,
4332 dev_list)
4333 if (dp->target == sdp->id)
4334 set_bit(SDEBUG_UA_MICROCODE_CHANGED_WO_RESET,
4335 dp->uas_bm);
4336 break;
4337 default:
4338 /* do nothing for this command for other mode values */
4339 break;
4340 }
4341 return 0;
4342}
4343
4344static int resp_comp_write(struct scsi_cmnd *scp,
4345 struct sdebug_dev_info *devip)
4346{
4347 u8 *cmd = scp->cmnd;
4348 u8 *arr;
4349 struct sdeb_store_info *sip = devip2sip(devip, true);
4350 u64 lba;
4351 u32 dnum;
4352 u32 lb_size = sdebug_sector_size;
4353 u8 num;
4354 int ret;
4355 int retval = 0;
4356
4357 lba = get_unaligned_be64(cmd + 2);
4358 num = cmd[13]; /* 1 to a maximum of 255 logical blocks */
4359 if (0 == num)
4360 return 0; /* degenerate case, not an error */
4361 if (sdebug_dif == T10_PI_TYPE2_PROTECTION &&
4362 (cmd[1] & 0xe0)) {
4363 mk_sense_invalid_opcode(scp);
4364 return check_condition_result;
4365 }
4366 if ((sdebug_dif == T10_PI_TYPE1_PROTECTION ||
4367 sdebug_dif == T10_PI_TYPE3_PROTECTION) &&
4368 (cmd[1] & 0xe0) == 0)
4369 sdev_printk(KERN_ERR, scp->device, "Unprotected WR "
4370 "to DIF device\n");
4371 ret = check_device_access_params(scp, lba, num, false);
4372 if (ret)
4373 return ret;
4374 dnum = 2 * num;
4375 arr = kcalloc(lb_size, dnum, GFP_ATOMIC);
4376 if (NULL == arr) {
4377 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
4378 INSUFF_RES_ASCQ);
4379 return check_condition_result;
4380 }
4381
4382 sdeb_write_lock(sip);
4383
4384 ret = do_dout_fetch(scp, dnum, arr);
4385 if (ret == -1) {
4386 retval = DID_ERROR << 16;
4387 goto cleanup;
4388 } else if (sdebug_verbose && (ret < (dnum * lb_size)))
4389 sdev_printk(KERN_INFO, scp->device, "%s: compare_write: cdb "
4390 "indicated=%u, IO sent=%d bytes\n", my_name,
4391 dnum * lb_size, ret);
4392 if (!comp_write_worker(sip, lba, num, arr, false)) {
4393 mk_sense_buffer(scp, MISCOMPARE, MISCOMPARE_VERIFY_ASC, 0);
4394 retval = check_condition_result;
4395 goto cleanup;
4396 }
4397 if (scsi_debug_lbp())
4398 map_region(sip, lba, num);
4399cleanup:
4400 sdeb_write_unlock(sip);
4401 kfree(arr);
4402 return retval;
4403}
4404
4405struct unmap_block_desc {
4406 __be64 lba;
4407 __be32 blocks;
4408 __be32 __reserved;
4409};
4410
4411static int resp_unmap(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
4412{
4413 unsigned char *buf;
4414 struct unmap_block_desc *desc;
4415 struct sdeb_store_info *sip = devip2sip(devip, true);
4416 unsigned int i, payload_len, descriptors;
4417 int ret;
4418
4419 if (!scsi_debug_lbp())
4420 return 0; /* fib and say its done */
4421 payload_len = get_unaligned_be16(scp->cmnd + 7);
4422 BUG_ON(scsi_bufflen(scp) != payload_len);
4423
4424 descriptors = (payload_len - 8) / 16;
4425 if (descriptors > sdebug_unmap_max_desc) {
4426 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 7, -1);
4427 return check_condition_result;
4428 }
4429
4430 buf = kzalloc(scsi_bufflen(scp), GFP_ATOMIC);
4431 if (!buf) {
4432 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
4433 INSUFF_RES_ASCQ);
4434 return check_condition_result;
4435 }
4436
4437 scsi_sg_copy_to_buffer(scp, buf, scsi_bufflen(scp));
4438
4439 BUG_ON(get_unaligned_be16(&buf[0]) != payload_len - 2);
4440 BUG_ON(get_unaligned_be16(&buf[2]) != descriptors * 16);
4441
4442 desc = (void *)&buf[8];
4443
4444 sdeb_write_lock(sip);
4445
4446 for (i = 0 ; i < descriptors ; i++) {
4447 unsigned long long lba = get_unaligned_be64(&desc[i].lba);
4448 unsigned int num = get_unaligned_be32(&desc[i].blocks);
4449
4450 ret = check_device_access_params(scp, lba, num, true);
4451 if (ret)
4452 goto out;
4453
4454 unmap_region(sip, lba, num);
4455 }
4456
4457 ret = 0;
4458
4459out:
4460 sdeb_write_unlock(sip);
4461 kfree(buf);
4462
4463 return ret;
4464}
4465
4466#define SDEBUG_GET_LBA_STATUS_LEN 32
4467
4468static int resp_get_lba_status(struct scsi_cmnd *scp,
4469 struct sdebug_dev_info *devip)
4470{
4471 u8 *cmd = scp->cmnd;
4472 u64 lba;
4473 u32 alloc_len, mapped, num;
4474 int ret;
4475 u8 arr[SDEBUG_GET_LBA_STATUS_LEN];
4476
4477 lba = get_unaligned_be64(cmd + 2);
4478 alloc_len = get_unaligned_be32(cmd + 10);
4479
4480 if (alloc_len < 24)
4481 return 0;
4482
4483 ret = check_device_access_params(scp, lba, 1, false);
4484 if (ret)
4485 return ret;
4486
4487 if (scsi_debug_lbp()) {
4488 struct sdeb_store_info *sip = devip2sip(devip, true);
4489
4490 mapped = map_state(sip, lba, &num);
4491 } else {
4492 mapped = 1;
4493 /* following just in case virtual_gb changed */
4494 sdebug_capacity = get_sdebug_capacity();
4495 if (sdebug_capacity - lba <= 0xffffffff)
4496 num = sdebug_capacity - lba;
4497 else
4498 num = 0xffffffff;
4499 }
4500
4501 memset(arr, 0, SDEBUG_GET_LBA_STATUS_LEN);
4502 put_unaligned_be32(20, arr); /* Parameter Data Length */
4503 put_unaligned_be64(lba, arr + 8); /* LBA */
4504 put_unaligned_be32(num, arr + 16); /* Number of blocks */
4505 arr[20] = !mapped; /* prov_stat=0: mapped; 1: dealloc */
4506
4507 return fill_from_dev_buffer(scp, arr, SDEBUG_GET_LBA_STATUS_LEN);
4508}
4509
4510static int resp_sync_cache(struct scsi_cmnd *scp,
4511 struct sdebug_dev_info *devip)
4512{
4513 int res = 0;
4514 u64 lba;
4515 u32 num_blocks;
4516 u8 *cmd = scp->cmnd;
4517
4518 if (cmd[0] == SYNCHRONIZE_CACHE) { /* 10 byte cdb */
4519 lba = get_unaligned_be32(cmd + 2);
4520 num_blocks = get_unaligned_be16(cmd + 7);
4521 } else { /* SYNCHRONIZE_CACHE(16) */
4522 lba = get_unaligned_be64(cmd + 2);
4523 num_blocks = get_unaligned_be32(cmd + 10);
4524 }
4525 if (lba + num_blocks > sdebug_capacity) {
4526 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
4527 return check_condition_result;
4528 }
4529 if (!write_since_sync || (cmd[1] & 0x2))
4530 res = SDEG_RES_IMMED_MASK;
4531 else /* delay if write_since_sync and IMMED clear */
4532 write_since_sync = false;
4533 return res;
4534}
4535
4536/*
4537 * Assuming the LBA+num_blocks is not out-of-range, this function will return
4538 * CONDITION MET if the specified blocks will/have fitted in the cache, and
4539 * a GOOD status otherwise. Model a disk with a big cache and yield
4540 * CONDITION MET. Actually tries to bring range in main memory into the
4541 * cache associated with the CPU(s).
4542 */
4543static int resp_pre_fetch(struct scsi_cmnd *scp,
4544 struct sdebug_dev_info *devip)
4545{
4546 int res = 0;
4547 u64 lba;
4548 u64 block, rest = 0;
4549 u32 nblks;
4550 u8 *cmd = scp->cmnd;
4551 struct sdeb_store_info *sip = devip2sip(devip, true);
4552 u8 *fsp = sip->storep;
4553
4554 if (cmd[0] == PRE_FETCH) { /* 10 byte cdb */
4555 lba = get_unaligned_be32(cmd + 2);
4556 nblks = get_unaligned_be16(cmd + 7);
4557 } else { /* PRE-FETCH(16) */
4558 lba = get_unaligned_be64(cmd + 2);
4559 nblks = get_unaligned_be32(cmd + 10);
4560 }
4561 if (lba + nblks > sdebug_capacity) {
4562 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
4563 return check_condition_result;
4564 }
4565 if (!fsp)
4566 goto fini;
4567 /* PRE-FETCH spec says nothing about LBP or PI so skip them */
4568 block = do_div(lba, sdebug_store_sectors);
4569 if (block + nblks > sdebug_store_sectors)
4570 rest = block + nblks - sdebug_store_sectors;
4571
4572 /* Try to bring the PRE-FETCH range into CPU's cache */
4573 sdeb_read_lock(sip);
4574 prefetch_range(fsp + (sdebug_sector_size * block),
4575 (nblks - rest) * sdebug_sector_size);
4576 if (rest)
4577 prefetch_range(fsp, rest * sdebug_sector_size);
4578 sdeb_read_unlock(sip);
4579fini:
4580 if (cmd[1] & 0x2)
4581 res = SDEG_RES_IMMED_MASK;
4582 return res | condition_met_result;
4583}
4584
4585#define RL_BUCKET_ELEMS 8
4586
4587/* Even though each pseudo target has a REPORT LUNS "well known logical unit"
4588 * (W-LUN), the normal Linux scanning logic does not associate it with a
4589 * device (e.g. /dev/sg7). The following magic will make that association:
4590 * "cd /sys/class/scsi_host/host<n> ; echo '- - 49409' > scan"
4591 * where <n> is a host number. If there are multiple targets in a host then
4592 * the above will associate a W-LUN to each target. To only get a W-LUN
4593 * for target 2, then use "echo '- 2 49409' > scan" .
4594 */
4595static int resp_report_luns(struct scsi_cmnd *scp,
4596 struct sdebug_dev_info *devip)
4597{
4598 unsigned char *cmd = scp->cmnd;
4599 unsigned int alloc_len;
4600 unsigned char select_report;
4601 u64 lun;
4602 struct scsi_lun *lun_p;
4603 u8 arr[RL_BUCKET_ELEMS * sizeof(struct scsi_lun)];
4604 unsigned int lun_cnt; /* normal LUN count (max: 256) */
4605 unsigned int wlun_cnt; /* report luns W-LUN count */
4606 unsigned int tlun_cnt; /* total LUN count */
4607 unsigned int rlen; /* response length (in bytes) */
4608 int k, j, n, res;
4609 unsigned int off_rsp = 0;
4610 const int sz_lun = sizeof(struct scsi_lun);
4611
4612 clear_luns_changed_on_target(devip);
4613
4614 select_report = cmd[2];
4615 alloc_len = get_unaligned_be32(cmd + 6);
4616
4617 if (alloc_len < 4) {
4618 pr_err("alloc len too small %d\n", alloc_len);
4619 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 6, -1);
4620 return check_condition_result;
4621 }
4622
4623 switch (select_report) {
4624 case 0: /* all LUNs apart from W-LUNs */
4625 lun_cnt = sdebug_max_luns;
4626 wlun_cnt = 0;
4627 break;
4628 case 1: /* only W-LUNs */
4629 lun_cnt = 0;
4630 wlun_cnt = 1;
4631 break;
4632 case 2: /* all LUNs */
4633 lun_cnt = sdebug_max_luns;
4634 wlun_cnt = 1;
4635 break;
4636 case 0x10: /* only administrative LUs */
4637 case 0x11: /* see SPC-5 */
4638 case 0x12: /* only subsiduary LUs owned by referenced LU */
4639 default:
4640 pr_debug("select report invalid %d\n", select_report);
4641 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, -1);
4642 return check_condition_result;
4643 }
4644
4645 if (sdebug_no_lun_0 && (lun_cnt > 0))
4646 --lun_cnt;
4647
4648 tlun_cnt = lun_cnt + wlun_cnt;
4649 rlen = tlun_cnt * sz_lun; /* excluding 8 byte header */
4650 scsi_set_resid(scp, scsi_bufflen(scp));
4651 pr_debug("select_report %d luns = %d wluns = %d no_lun0 %d\n",
4652 select_report, lun_cnt, wlun_cnt, sdebug_no_lun_0);
4653
4654 /* loops rely on sizeof response header same as sizeof lun (both 8) */
4655 lun = sdebug_no_lun_0 ? 1 : 0;
4656 for (k = 0, j = 0, res = 0; true; ++k, j = 0) {
4657 memset(arr, 0, sizeof(arr));
4658 lun_p = (struct scsi_lun *)&arr[0];
4659 if (k == 0) {
4660 put_unaligned_be32(rlen, &arr[0]);
4661 ++lun_p;
4662 j = 1;
4663 }
4664 for ( ; j < RL_BUCKET_ELEMS; ++j, ++lun_p) {
4665 if ((k * RL_BUCKET_ELEMS) + j > lun_cnt)
4666 break;
4667 int_to_scsilun(lun++, lun_p);
4668 if (lun > 1 && sdebug_lun_am == SAM_LUN_AM_FLAT)
4669 lun_p->scsi_lun[0] |= 0x40;
4670 }
4671 if (j < RL_BUCKET_ELEMS)
4672 break;
4673 n = j * sz_lun;
4674 res = p_fill_from_dev_buffer(scp, arr, n, off_rsp);
4675 if (res)
4676 return res;
4677 off_rsp += n;
4678 }
4679 if (wlun_cnt) {
4680 int_to_scsilun(SCSI_W_LUN_REPORT_LUNS, lun_p);
4681 ++j;
4682 }
4683 if (j > 0)
4684 res = p_fill_from_dev_buffer(scp, arr, j * sz_lun, off_rsp);
4685 return res;
4686}
4687
4688static int resp_verify(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
4689{
4690 bool is_bytchk3 = false;
4691 u8 bytchk;
4692 int ret, j;
4693 u32 vnum, a_num, off;
4694 const u32 lb_size = sdebug_sector_size;
4695 u64 lba;
4696 u8 *arr;
4697 u8 *cmd = scp->cmnd;
4698 struct sdeb_store_info *sip = devip2sip(devip, true);
4699
4700 bytchk = (cmd[1] >> 1) & 0x3;
4701 if (bytchk == 0) {
4702 return 0; /* always claim internal verify okay */
4703 } else if (bytchk == 2) {
4704 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 2);
4705 return check_condition_result;
4706 } else if (bytchk == 3) {
4707 is_bytchk3 = true; /* 1 block sent, compared repeatedly */
4708 }
4709 switch (cmd[0]) {
4710 case VERIFY_16:
4711 lba = get_unaligned_be64(cmd + 2);
4712 vnum = get_unaligned_be32(cmd + 10);
4713 break;
4714 case VERIFY: /* is VERIFY(10) */
4715 lba = get_unaligned_be32(cmd + 2);
4716 vnum = get_unaligned_be16(cmd + 7);
4717 break;
4718 default:
4719 mk_sense_invalid_opcode(scp);
4720 return check_condition_result;
4721 }
4722 if (vnum == 0)
4723 return 0; /* not an error */
4724 a_num = is_bytchk3 ? 1 : vnum;
4725 /* Treat following check like one for read (i.e. no write) access */
4726 ret = check_device_access_params(scp, lba, a_num, false);
4727 if (ret)
4728 return ret;
4729
4730 arr = kcalloc(lb_size, vnum, GFP_ATOMIC | __GFP_NOWARN);
4731 if (!arr) {
4732 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
4733 INSUFF_RES_ASCQ);
4734 return check_condition_result;
4735 }
4736 /* Not changing store, so only need read access */
4737 sdeb_read_lock(sip);
4738
4739 ret = do_dout_fetch(scp, a_num, arr);
4740 if (ret == -1) {
4741 ret = DID_ERROR << 16;
4742 goto cleanup;
4743 } else if (sdebug_verbose && (ret < (a_num * lb_size))) {
4744 sdev_printk(KERN_INFO, scp->device,
4745 "%s: %s: cdb indicated=%u, IO sent=%d bytes\n",
4746 my_name, __func__, a_num * lb_size, ret);
4747 }
4748 if (is_bytchk3) {
4749 for (j = 1, off = lb_size; j < vnum; ++j, off += lb_size)
4750 memcpy(arr + off, arr, lb_size);
4751 }
4752 ret = 0;
4753 if (!comp_write_worker(sip, lba, vnum, arr, true)) {
4754 mk_sense_buffer(scp, MISCOMPARE, MISCOMPARE_VERIFY_ASC, 0);
4755 ret = check_condition_result;
4756 goto cleanup;
4757 }
4758cleanup:
4759 sdeb_read_unlock(sip);
4760 kfree(arr);
4761 return ret;
4762}
4763
4764#define RZONES_DESC_HD 64
4765
4766/* Report zones depending on start LBA and reporting options */
4767static int resp_report_zones(struct scsi_cmnd *scp,
4768 struct sdebug_dev_info *devip)
4769{
4770 unsigned int rep_max_zones, nrz = 0;
4771 int ret = 0;
4772 u32 alloc_len, rep_opts, rep_len;
4773 bool partial;
4774 u64 lba, zs_lba;
4775 u8 *arr = NULL, *desc;
4776 u8 *cmd = scp->cmnd;
4777 struct sdeb_zone_state *zsp = NULL;
4778 struct sdeb_store_info *sip = devip2sip(devip, false);
4779
4780 if (!sdebug_dev_is_zoned(devip)) {
4781 mk_sense_invalid_opcode(scp);
4782 return check_condition_result;
4783 }
4784 zs_lba = get_unaligned_be64(cmd + 2);
4785 alloc_len = get_unaligned_be32(cmd + 10);
4786 if (alloc_len == 0)
4787 return 0; /* not an error */
4788 rep_opts = cmd[14] & 0x3f;
4789 partial = cmd[14] & 0x80;
4790
4791 if (zs_lba >= sdebug_capacity) {
4792 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
4793 return check_condition_result;
4794 }
4795
4796 rep_max_zones = (alloc_len - 64) >> ilog2(RZONES_DESC_HD);
4797
4798 arr = kzalloc(alloc_len, GFP_ATOMIC | __GFP_NOWARN);
4799 if (!arr) {
4800 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
4801 INSUFF_RES_ASCQ);
4802 return check_condition_result;
4803 }
4804
4805 sdeb_read_lock(sip);
4806
4807 desc = arr + 64;
4808 for (lba = zs_lba; lba < sdebug_capacity;
4809 lba = zsp->z_start + zsp->z_size) {
4810 if (WARN_ONCE(zbc_zone(devip, lba) == zsp, "lba = %llu\n", lba))
4811 break;
4812 zsp = zbc_zone(devip, lba);
4813 switch (rep_opts) {
4814 case 0x00:
4815 /* All zones */
4816 break;
4817 case 0x01:
4818 /* Empty zones */
4819 if (zsp->z_cond != ZC1_EMPTY)
4820 continue;
4821 break;
4822 case 0x02:
4823 /* Implicit open zones */
4824 if (zsp->z_cond != ZC2_IMPLICIT_OPEN)
4825 continue;
4826 break;
4827 case 0x03:
4828 /* Explicit open zones */
4829 if (zsp->z_cond != ZC3_EXPLICIT_OPEN)
4830 continue;
4831 break;
4832 case 0x04:
4833 /* Closed zones */
4834 if (zsp->z_cond != ZC4_CLOSED)
4835 continue;
4836 break;
4837 case 0x05:
4838 /* Full zones */
4839 if (zsp->z_cond != ZC5_FULL)
4840 continue;
4841 break;
4842 case 0x06:
4843 case 0x07:
4844 case 0x10:
4845 /*
4846 * Read-only, offline, reset WP recommended are
4847 * not emulated: no zones to report;
4848 */
4849 continue;
4850 case 0x11:
4851 /* non-seq-resource set */
4852 if (!zsp->z_non_seq_resource)
4853 continue;
4854 break;
4855 case 0x3e:
4856 /* All zones except gap zones. */
4857 if (zbc_zone_is_gap(zsp))
4858 continue;
4859 break;
4860 case 0x3f:
4861 /* Not write pointer (conventional) zones */
4862 if (zbc_zone_is_seq(zsp))
4863 continue;
4864 break;
4865 default:
4866 mk_sense_buffer(scp, ILLEGAL_REQUEST,
4867 INVALID_FIELD_IN_CDB, 0);
4868 ret = check_condition_result;
4869 goto fini;
4870 }
4871
4872 if (nrz < rep_max_zones) {
4873 /* Fill zone descriptor */
4874 desc[0] = zsp->z_type;
4875 desc[1] = zsp->z_cond << 4;
4876 if (zsp->z_non_seq_resource)
4877 desc[1] |= 1 << 1;
4878 put_unaligned_be64((u64)zsp->z_size, desc + 8);
4879 put_unaligned_be64((u64)zsp->z_start, desc + 16);
4880 put_unaligned_be64((u64)zsp->z_wp, desc + 24);
4881 desc += 64;
4882 }
4883
4884 if (partial && nrz >= rep_max_zones)
4885 break;
4886
4887 nrz++;
4888 }
4889
4890 /* Report header */
4891 /* Zone list length. */
4892 put_unaligned_be32(nrz * RZONES_DESC_HD, arr + 0);
4893 /* Maximum LBA */
4894 put_unaligned_be64(sdebug_capacity - 1, arr + 8);
4895 /* Zone starting LBA granularity. */
4896 if (devip->zcap < devip->zsize)
4897 put_unaligned_be64(devip->zsize, arr + 16);
4898
4899 rep_len = (unsigned long)desc - (unsigned long)arr;
4900 ret = fill_from_dev_buffer(scp, arr, min_t(u32, alloc_len, rep_len));
4901
4902fini:
4903 sdeb_read_unlock(sip);
4904 kfree(arr);
4905 return ret;
4906}
4907
4908/* Logic transplanted from tcmu-runner, file_zbc.c */
4909static void zbc_open_all(struct sdebug_dev_info *devip)
4910{
4911 struct sdeb_zone_state *zsp = &devip->zstate[0];
4912 unsigned int i;
4913
4914 for (i = 0; i < devip->nr_zones; i++, zsp++) {
4915 if (zsp->z_cond == ZC4_CLOSED)
4916 zbc_open_zone(devip, &devip->zstate[i], true);
4917 }
4918}
4919
4920static int resp_open_zone(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
4921{
4922 int res = 0;
4923 u64 z_id;
4924 enum sdebug_z_cond zc;
4925 u8 *cmd = scp->cmnd;
4926 struct sdeb_zone_state *zsp;
4927 bool all = cmd[14] & 0x01;
4928 struct sdeb_store_info *sip = devip2sip(devip, false);
4929
4930 if (!sdebug_dev_is_zoned(devip)) {
4931 mk_sense_invalid_opcode(scp);
4932 return check_condition_result;
4933 }
4934
4935 sdeb_write_lock(sip);
4936
4937 if (all) {
4938 /* Check if all closed zones can be open */
4939 if (devip->max_open &&
4940 devip->nr_exp_open + devip->nr_closed > devip->max_open) {
4941 mk_sense_buffer(scp, DATA_PROTECT, INSUFF_RES_ASC,
4942 INSUFF_ZONE_ASCQ);
4943 res = check_condition_result;
4944 goto fini;
4945 }
4946 /* Open all closed zones */
4947 zbc_open_all(devip);
4948 goto fini;
4949 }
4950
4951 /* Open the specified zone */
4952 z_id = get_unaligned_be64(cmd + 2);
4953 if (z_id >= sdebug_capacity) {
4954 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
4955 res = check_condition_result;
4956 goto fini;
4957 }
4958
4959 zsp = zbc_zone(devip, z_id);
4960 if (z_id != zsp->z_start) {
4961 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
4962 res = check_condition_result;
4963 goto fini;
4964 }
4965 if (zbc_zone_is_conv(zsp)) {
4966 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
4967 res = check_condition_result;
4968 goto fini;
4969 }
4970
4971 zc = zsp->z_cond;
4972 if (zc == ZC3_EXPLICIT_OPEN || zc == ZC5_FULL)
4973 goto fini;
4974
4975 if (devip->max_open && devip->nr_exp_open >= devip->max_open) {
4976 mk_sense_buffer(scp, DATA_PROTECT, INSUFF_RES_ASC,
4977 INSUFF_ZONE_ASCQ);
4978 res = check_condition_result;
4979 goto fini;
4980 }
4981
4982 zbc_open_zone(devip, zsp, true);
4983fini:
4984 sdeb_write_unlock(sip);
4985 return res;
4986}
4987
4988static void zbc_close_all(struct sdebug_dev_info *devip)
4989{
4990 unsigned int i;
4991
4992 for (i = 0; i < devip->nr_zones; i++)
4993 zbc_close_zone(devip, &devip->zstate[i]);
4994}
4995
4996static int resp_close_zone(struct scsi_cmnd *scp,
4997 struct sdebug_dev_info *devip)
4998{
4999 int res = 0;
5000 u64 z_id;
5001 u8 *cmd = scp->cmnd;
5002 struct sdeb_zone_state *zsp;
5003 bool all = cmd[14] & 0x01;
5004 struct sdeb_store_info *sip = devip2sip(devip, false);
5005
5006 if (!sdebug_dev_is_zoned(devip)) {
5007 mk_sense_invalid_opcode(scp);
5008 return check_condition_result;
5009 }
5010
5011 sdeb_write_lock(sip);
5012
5013 if (all) {
5014 zbc_close_all(devip);
5015 goto fini;
5016 }
5017
5018 /* Close specified zone */
5019 z_id = get_unaligned_be64(cmd + 2);
5020 if (z_id >= sdebug_capacity) {
5021 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
5022 res = check_condition_result;
5023 goto fini;
5024 }
5025
5026 zsp = zbc_zone(devip, z_id);
5027 if (z_id != zsp->z_start) {
5028 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
5029 res = check_condition_result;
5030 goto fini;
5031 }
5032 if (zbc_zone_is_conv(zsp)) {
5033 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
5034 res = check_condition_result;
5035 goto fini;
5036 }
5037
5038 zbc_close_zone(devip, zsp);
5039fini:
5040 sdeb_write_unlock(sip);
5041 return res;
5042}
5043
5044static void zbc_finish_zone(struct sdebug_dev_info *devip,
5045 struct sdeb_zone_state *zsp, bool empty)
5046{
5047 enum sdebug_z_cond zc = zsp->z_cond;
5048
5049 if (zc == ZC4_CLOSED || zc == ZC2_IMPLICIT_OPEN ||
5050 zc == ZC3_EXPLICIT_OPEN || (empty && zc == ZC1_EMPTY)) {
5051 if (zc == ZC2_IMPLICIT_OPEN || zc == ZC3_EXPLICIT_OPEN)
5052 zbc_close_zone(devip, zsp);
5053 if (zsp->z_cond == ZC4_CLOSED)
5054 devip->nr_closed--;
5055 zsp->z_wp = zsp->z_start + zsp->z_size;
5056 zsp->z_cond = ZC5_FULL;
5057 }
5058}
5059
5060static void zbc_finish_all(struct sdebug_dev_info *devip)
5061{
5062 unsigned int i;
5063
5064 for (i = 0; i < devip->nr_zones; i++)
5065 zbc_finish_zone(devip, &devip->zstate[i], false);
5066}
5067
5068static int resp_finish_zone(struct scsi_cmnd *scp,
5069 struct sdebug_dev_info *devip)
5070{
5071 struct sdeb_zone_state *zsp;
5072 int res = 0;
5073 u64 z_id;
5074 u8 *cmd = scp->cmnd;
5075 bool all = cmd[14] & 0x01;
5076 struct sdeb_store_info *sip = devip2sip(devip, false);
5077
5078 if (!sdebug_dev_is_zoned(devip)) {
5079 mk_sense_invalid_opcode(scp);
5080 return check_condition_result;
5081 }
5082
5083 sdeb_write_lock(sip);
5084
5085 if (all) {
5086 zbc_finish_all(devip);
5087 goto fini;
5088 }
5089
5090 /* Finish the specified zone */
5091 z_id = get_unaligned_be64(cmd + 2);
5092 if (z_id >= sdebug_capacity) {
5093 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
5094 res = check_condition_result;
5095 goto fini;
5096 }
5097
5098 zsp = zbc_zone(devip, z_id);
5099 if (z_id != zsp->z_start) {
5100 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
5101 res = check_condition_result;
5102 goto fini;
5103 }
5104 if (zbc_zone_is_conv(zsp)) {
5105 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
5106 res = check_condition_result;
5107 goto fini;
5108 }
5109
5110 zbc_finish_zone(devip, zsp, true);
5111fini:
5112 sdeb_write_unlock(sip);
5113 return res;
5114}
5115
5116static void zbc_rwp_zone(struct sdebug_dev_info *devip,
5117 struct sdeb_zone_state *zsp)
5118{
5119 enum sdebug_z_cond zc;
5120 struct sdeb_store_info *sip = devip2sip(devip, false);
5121
5122 if (!zbc_zone_is_seq(zsp))
5123 return;
5124
5125 zc = zsp->z_cond;
5126 if (zc == ZC2_IMPLICIT_OPEN || zc == ZC3_EXPLICIT_OPEN)
5127 zbc_close_zone(devip, zsp);
5128
5129 if (zsp->z_cond == ZC4_CLOSED)
5130 devip->nr_closed--;
5131
5132 if (zsp->z_wp > zsp->z_start)
5133 memset(sip->storep + zsp->z_start * sdebug_sector_size, 0,
5134 (zsp->z_wp - zsp->z_start) * sdebug_sector_size);
5135
5136 zsp->z_non_seq_resource = false;
5137 zsp->z_wp = zsp->z_start;
5138 zsp->z_cond = ZC1_EMPTY;
5139}
5140
5141static void zbc_rwp_all(struct sdebug_dev_info *devip)
5142{
5143 unsigned int i;
5144
5145 for (i = 0; i < devip->nr_zones; i++)
5146 zbc_rwp_zone(devip, &devip->zstate[i]);
5147}
5148
5149static int resp_rwp_zone(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
5150{
5151 struct sdeb_zone_state *zsp;
5152 int res = 0;
5153 u64 z_id;
5154 u8 *cmd = scp->cmnd;
5155 bool all = cmd[14] & 0x01;
5156 struct sdeb_store_info *sip = devip2sip(devip, false);
5157
5158 if (!sdebug_dev_is_zoned(devip)) {
5159 mk_sense_invalid_opcode(scp);
5160 return check_condition_result;
5161 }
5162
5163 sdeb_write_lock(sip);
5164
5165 if (all) {
5166 zbc_rwp_all(devip);
5167 goto fini;
5168 }
5169
5170 z_id = get_unaligned_be64(cmd + 2);
5171 if (z_id >= sdebug_capacity) {
5172 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
5173 res = check_condition_result;
5174 goto fini;
5175 }
5176
5177 zsp = zbc_zone(devip, z_id);
5178 if (z_id != zsp->z_start) {
5179 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
5180 res = check_condition_result;
5181 goto fini;
5182 }
5183 if (zbc_zone_is_conv(zsp)) {
5184 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
5185 res = check_condition_result;
5186 goto fini;
5187 }
5188
5189 zbc_rwp_zone(devip, zsp);
5190fini:
5191 sdeb_write_unlock(sip);
5192 return res;
5193}
5194
5195static u32 get_tag(struct scsi_cmnd *cmnd)
5196{
5197 return blk_mq_unique_tag(scsi_cmd_to_rq(cmnd));
5198}
5199
5200/* Queued (deferred) command completions converge here. */
5201static void sdebug_q_cmd_complete(struct sdebug_defer *sd_dp)
5202{
5203 struct sdebug_queued_cmd *sqcp = container_of(sd_dp, struct sdebug_queued_cmd, sd_dp);
5204 unsigned long flags;
5205 struct scsi_cmnd *scp = sqcp->scmd;
5206 struct sdebug_scsi_cmd *sdsc;
5207 bool aborted;
5208
5209 if (sdebug_statistics) {
5210 atomic_inc(&sdebug_completions);
5211 if (raw_smp_processor_id() != sd_dp->issuing_cpu)
5212 atomic_inc(&sdebug_miss_cpus);
5213 }
5214
5215 if (!scp) {
5216 pr_err("scmd=NULL\n");
5217 goto out;
5218 }
5219
5220 sdsc = scsi_cmd_priv(scp);
5221 spin_lock_irqsave(&sdsc->lock, flags);
5222 aborted = sd_dp->aborted;
5223 if (unlikely(aborted))
5224 sd_dp->aborted = false;
5225 ASSIGN_QUEUED_CMD(scp, NULL);
5226
5227 spin_unlock_irqrestore(&sdsc->lock, flags);
5228
5229 if (aborted) {
5230 pr_info("bypassing scsi_done() due to aborted cmd, kicking-off EH\n");
5231 blk_abort_request(scsi_cmd_to_rq(scp));
5232 goto out;
5233 }
5234
5235 scsi_done(scp); /* callback to mid level */
5236out:
5237 sdebug_free_queued_cmd(sqcp);
5238}
5239
5240/* When high resolution timer goes off this function is called. */
5241static enum hrtimer_restart sdebug_q_cmd_hrt_complete(struct hrtimer *timer)
5242{
5243 struct sdebug_defer *sd_dp = container_of(timer, struct sdebug_defer,
5244 hrt);
5245 sdebug_q_cmd_complete(sd_dp);
5246 return HRTIMER_NORESTART;
5247}
5248
5249/* When work queue schedules work, it calls this function. */
5250static void sdebug_q_cmd_wq_complete(struct work_struct *work)
5251{
5252 struct sdebug_defer *sd_dp = container_of(work, struct sdebug_defer,
5253 ew.work);
5254 sdebug_q_cmd_complete(sd_dp);
5255}
5256
5257static bool got_shared_uuid;
5258static uuid_t shared_uuid;
5259
5260static int sdebug_device_create_zones(struct sdebug_dev_info *devip)
5261{
5262 struct sdeb_zone_state *zsp;
5263 sector_t capacity = get_sdebug_capacity();
5264 sector_t conv_capacity;
5265 sector_t zstart = 0;
5266 unsigned int i;
5267
5268 /*
5269 * Set the zone size: if sdeb_zbc_zone_size_mb is not set, figure out
5270 * a zone size allowing for at least 4 zones on the device. Otherwise,
5271 * use the specified zone size checking that at least 2 zones can be
5272 * created for the device.
5273 */
5274 if (!sdeb_zbc_zone_size_mb) {
5275 devip->zsize = (DEF_ZBC_ZONE_SIZE_MB * SZ_1M)
5276 >> ilog2(sdebug_sector_size);
5277 while (capacity < devip->zsize << 2 && devip->zsize >= 2)
5278 devip->zsize >>= 1;
5279 if (devip->zsize < 2) {
5280 pr_err("Device capacity too small\n");
5281 return -EINVAL;
5282 }
5283 } else {
5284 if (!is_power_of_2(sdeb_zbc_zone_size_mb)) {
5285 pr_err("Zone size is not a power of 2\n");
5286 return -EINVAL;
5287 }
5288 devip->zsize = (sdeb_zbc_zone_size_mb * SZ_1M)
5289 >> ilog2(sdebug_sector_size);
5290 if (devip->zsize >= capacity) {
5291 pr_err("Zone size too large for device capacity\n");
5292 return -EINVAL;
5293 }
5294 }
5295
5296 devip->zsize_shift = ilog2(devip->zsize);
5297 devip->nr_zones = (capacity + devip->zsize - 1) >> devip->zsize_shift;
5298
5299 if (sdeb_zbc_zone_cap_mb == 0) {
5300 devip->zcap = devip->zsize;
5301 } else {
5302 devip->zcap = (sdeb_zbc_zone_cap_mb * SZ_1M) >>
5303 ilog2(sdebug_sector_size);
5304 if (devip->zcap > devip->zsize) {
5305 pr_err("Zone capacity too large\n");
5306 return -EINVAL;
5307 }
5308 }
5309
5310 conv_capacity = (sector_t)sdeb_zbc_nr_conv << devip->zsize_shift;
5311 if (conv_capacity >= capacity) {
5312 pr_err("Number of conventional zones too large\n");
5313 return -EINVAL;
5314 }
5315 devip->nr_conv_zones = sdeb_zbc_nr_conv;
5316 devip->nr_seq_zones = ALIGN(capacity - conv_capacity, devip->zsize) >>
5317 devip->zsize_shift;
5318 devip->nr_zones = devip->nr_conv_zones + devip->nr_seq_zones;
5319
5320 /* Add gap zones if zone capacity is smaller than the zone size */
5321 if (devip->zcap < devip->zsize)
5322 devip->nr_zones += devip->nr_seq_zones;
5323
5324 if (devip->zoned) {
5325 /* zbc_max_open_zones can be 0, meaning "not reported" */
5326 if (sdeb_zbc_max_open >= devip->nr_zones - 1)
5327 devip->max_open = (devip->nr_zones - 1) / 2;
5328 else
5329 devip->max_open = sdeb_zbc_max_open;
5330 }
5331
5332 devip->zstate = kcalloc(devip->nr_zones,
5333 sizeof(struct sdeb_zone_state), GFP_KERNEL);
5334 if (!devip->zstate)
5335 return -ENOMEM;
5336
5337 for (i = 0; i < devip->nr_zones; i++) {
5338 zsp = &devip->zstate[i];
5339
5340 zsp->z_start = zstart;
5341
5342 if (i < devip->nr_conv_zones) {
5343 zsp->z_type = ZBC_ZTYPE_CNV;
5344 zsp->z_cond = ZBC_NOT_WRITE_POINTER;
5345 zsp->z_wp = (sector_t)-1;
5346 zsp->z_size =
5347 min_t(u64, devip->zsize, capacity - zstart);
5348 } else if ((zstart & (devip->zsize - 1)) == 0) {
5349 if (devip->zoned)
5350 zsp->z_type = ZBC_ZTYPE_SWR;
5351 else
5352 zsp->z_type = ZBC_ZTYPE_SWP;
5353 zsp->z_cond = ZC1_EMPTY;
5354 zsp->z_wp = zsp->z_start;
5355 zsp->z_size =
5356 min_t(u64, devip->zcap, capacity - zstart);
5357 } else {
5358 zsp->z_type = ZBC_ZTYPE_GAP;
5359 zsp->z_cond = ZBC_NOT_WRITE_POINTER;
5360 zsp->z_wp = (sector_t)-1;
5361 zsp->z_size = min_t(u64, devip->zsize - devip->zcap,
5362 capacity - zstart);
5363 }
5364
5365 WARN_ON_ONCE((int)zsp->z_size <= 0);
5366 zstart += zsp->z_size;
5367 }
5368
5369 return 0;
5370}
5371
5372static struct sdebug_dev_info *sdebug_device_create(
5373 struct sdebug_host_info *sdbg_host, gfp_t flags)
5374{
5375 struct sdebug_dev_info *devip;
5376
5377 devip = kzalloc(sizeof(*devip), flags);
5378 if (devip) {
5379 if (sdebug_uuid_ctl == 1)
5380 uuid_gen(&devip->lu_name);
5381 else if (sdebug_uuid_ctl == 2) {
5382 if (got_shared_uuid)
5383 devip->lu_name = shared_uuid;
5384 else {
5385 uuid_gen(&shared_uuid);
5386 got_shared_uuid = true;
5387 devip->lu_name = shared_uuid;
5388 }
5389 }
5390 devip->sdbg_host = sdbg_host;
5391 if (sdeb_zbc_in_use) {
5392 devip->zoned = sdeb_zbc_model == BLK_ZONED_HM;
5393 if (sdebug_device_create_zones(devip)) {
5394 kfree(devip);
5395 return NULL;
5396 }
5397 } else {
5398 devip->zoned = false;
5399 }
5400 devip->create_ts = ktime_get_boottime();
5401 atomic_set(&devip->stopped, (sdeb_tur_ms_to_ready > 0 ? 2 : 0));
5402 spin_lock_init(&devip->list_lock);
5403 INIT_LIST_HEAD(&devip->inject_err_list);
5404 list_add_tail(&devip->dev_list, &sdbg_host->dev_info_list);
5405 }
5406 return devip;
5407}
5408
5409static struct sdebug_dev_info *find_build_dev_info(struct scsi_device *sdev)
5410{
5411 struct sdebug_host_info *sdbg_host;
5412 struct sdebug_dev_info *open_devip = NULL;
5413 struct sdebug_dev_info *devip;
5414
5415 sdbg_host = shost_to_sdebug_host(sdev->host);
5416
5417 list_for_each_entry(devip, &sdbg_host->dev_info_list, dev_list) {
5418 if ((devip->used) && (devip->channel == sdev->channel) &&
5419 (devip->target == sdev->id) &&
5420 (devip->lun == sdev->lun))
5421 return devip;
5422 else {
5423 if ((!devip->used) && (!open_devip))
5424 open_devip = devip;
5425 }
5426 }
5427 if (!open_devip) { /* try and make a new one */
5428 open_devip = sdebug_device_create(sdbg_host, GFP_ATOMIC);
5429 if (!open_devip) {
5430 pr_err("out of memory at line %d\n", __LINE__);
5431 return NULL;
5432 }
5433 }
5434
5435 open_devip->channel = sdev->channel;
5436 open_devip->target = sdev->id;
5437 open_devip->lun = sdev->lun;
5438 open_devip->sdbg_host = sdbg_host;
5439 set_bit(SDEBUG_UA_POOCCUR, open_devip->uas_bm);
5440 open_devip->used = true;
5441 return open_devip;
5442}
5443
5444static int scsi_debug_slave_alloc(struct scsi_device *sdp)
5445{
5446 if (sdebug_verbose)
5447 pr_info("slave_alloc <%u %u %u %llu>\n",
5448 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
5449
5450 return 0;
5451}
5452
5453static int scsi_debug_slave_configure(struct scsi_device *sdp)
5454{
5455 struct sdebug_dev_info *devip =
5456 (struct sdebug_dev_info *)sdp->hostdata;
5457 struct dentry *dentry;
5458
5459 if (sdebug_verbose)
5460 pr_info("slave_configure <%u %u %u %llu>\n",
5461 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
5462 if (sdp->host->max_cmd_len != SDEBUG_MAX_CMD_LEN)
5463 sdp->host->max_cmd_len = SDEBUG_MAX_CMD_LEN;
5464 if (devip == NULL) {
5465 devip = find_build_dev_info(sdp);
5466 if (devip == NULL)
5467 return 1; /* no resources, will be marked offline */
5468 }
5469 sdp->hostdata = devip;
5470 if (sdebug_no_uld)
5471 sdp->no_uld_attach = 1;
5472 config_cdb_len(sdp);
5473
5474 if (sdebug_allow_restart)
5475 sdp->allow_restart = 1;
5476
5477 devip->debugfs_entry = debugfs_create_dir(dev_name(&sdp->sdev_dev),
5478 sdebug_debugfs_root);
5479 if (IS_ERR_OR_NULL(devip->debugfs_entry))
5480 pr_info("%s: failed to create debugfs directory for device %s\n",
5481 __func__, dev_name(&sdp->sdev_gendev));
5482
5483 dentry = debugfs_create_file("error", 0600, devip->debugfs_entry, sdp,
5484 &sdebug_error_fops);
5485 if (IS_ERR_OR_NULL(dentry))
5486 pr_info("%s: failed to create error file for device %s\n",
5487 __func__, dev_name(&sdp->sdev_gendev));
5488
5489 return 0;
5490}
5491
5492static void scsi_debug_slave_destroy(struct scsi_device *sdp)
5493{
5494 struct sdebug_dev_info *devip =
5495 (struct sdebug_dev_info *)sdp->hostdata;
5496 struct sdebug_err_inject *err;
5497
5498 if (sdebug_verbose)
5499 pr_info("slave_destroy <%u %u %u %llu>\n",
5500 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
5501
5502 if (!devip)
5503 return;
5504
5505 spin_lock(&devip->list_lock);
5506 list_for_each_entry_rcu(err, &devip->inject_err_list, list) {
5507 list_del_rcu(&err->list);
5508 call_rcu(&err->rcu, sdebug_err_free);
5509 }
5510 spin_unlock(&devip->list_lock);
5511
5512 debugfs_remove(devip->debugfs_entry);
5513
5514 /* make this slot available for re-use */
5515 devip->used = false;
5516 sdp->hostdata = NULL;
5517}
5518
5519/* Returns true if we require the queued memory to be freed by the caller. */
5520static bool stop_qc_helper(struct sdebug_defer *sd_dp,
5521 enum sdeb_defer_type defer_t)
5522{
5523 if (defer_t == SDEB_DEFER_HRT) {
5524 int res = hrtimer_try_to_cancel(&sd_dp->hrt);
5525
5526 switch (res) {
5527 case 0: /* Not active, it must have already run */
5528 case -1: /* -1 It's executing the CB */
5529 return false;
5530 case 1: /* Was active, we've now cancelled */
5531 default:
5532 return true;
5533 }
5534 } else if (defer_t == SDEB_DEFER_WQ) {
5535 /* Cancel if pending */
5536 if (cancel_work_sync(&sd_dp->ew.work))
5537 return true;
5538 /* Was not pending, so it must have run */
5539 return false;
5540 } else if (defer_t == SDEB_DEFER_POLL) {
5541 return true;
5542 }
5543
5544 return false;
5545}
5546
5547
5548static bool scsi_debug_stop_cmnd(struct scsi_cmnd *cmnd)
5549{
5550 enum sdeb_defer_type l_defer_t;
5551 struct sdebug_defer *sd_dp;
5552 struct sdebug_scsi_cmd *sdsc = scsi_cmd_priv(cmnd);
5553 struct sdebug_queued_cmd *sqcp = TO_QUEUED_CMD(cmnd);
5554
5555 lockdep_assert_held(&sdsc->lock);
5556
5557 if (!sqcp)
5558 return false;
5559 sd_dp = &sqcp->sd_dp;
5560 l_defer_t = READ_ONCE(sd_dp->defer_t);
5561 ASSIGN_QUEUED_CMD(cmnd, NULL);
5562
5563 if (stop_qc_helper(sd_dp, l_defer_t))
5564 sdebug_free_queued_cmd(sqcp);
5565
5566 return true;
5567}
5568
5569/*
5570 * Called from scsi_debug_abort() only, which is for timed-out cmd.
5571 */
5572static bool scsi_debug_abort_cmnd(struct scsi_cmnd *cmnd)
5573{
5574 struct sdebug_scsi_cmd *sdsc = scsi_cmd_priv(cmnd);
5575 unsigned long flags;
5576 bool res;
5577
5578 spin_lock_irqsave(&sdsc->lock, flags);
5579 res = scsi_debug_stop_cmnd(cmnd);
5580 spin_unlock_irqrestore(&sdsc->lock, flags);
5581
5582 return res;
5583}
5584
5585/*
5586 * All we can do is set the cmnd as internally aborted and wait for it to
5587 * finish. We cannot call scsi_done() as normal completion path may do that.
5588 */
5589static bool sdebug_stop_cmnd(struct request *rq, void *data)
5590{
5591 scsi_debug_abort_cmnd(blk_mq_rq_to_pdu(rq));
5592
5593 return true;
5594}
5595
5596/* Deletes (stops) timers or work queues of all queued commands */
5597static void stop_all_queued(void)
5598{
5599 struct sdebug_host_info *sdhp;
5600
5601 mutex_lock(&sdebug_host_list_mutex);
5602 list_for_each_entry(sdhp, &sdebug_host_list, host_list) {
5603 struct Scsi_Host *shost = sdhp->shost;
5604
5605 blk_mq_tagset_busy_iter(&shost->tag_set, sdebug_stop_cmnd, NULL);
5606 }
5607 mutex_unlock(&sdebug_host_list_mutex);
5608}
5609
5610static int sdebug_fail_abort(struct scsi_cmnd *cmnd)
5611{
5612 struct scsi_device *sdp = cmnd->device;
5613 struct sdebug_dev_info *devip = (struct sdebug_dev_info *)sdp->hostdata;
5614 struct sdebug_err_inject *err;
5615 unsigned char *cmd = cmnd->cmnd;
5616 int ret = 0;
5617
5618 if (devip == NULL)
5619 return 0;
5620
5621 rcu_read_lock();
5622 list_for_each_entry_rcu(err, &devip->inject_err_list, list) {
5623 if (err->type == ERR_ABORT_CMD_FAILED &&
5624 (err->cmd == cmd[0] || err->cmd == 0xff)) {
5625 ret = !!err->cnt;
5626 if (err->cnt < 0)
5627 err->cnt++;
5628
5629 rcu_read_unlock();
5630 return ret;
5631 }
5632 }
5633 rcu_read_unlock();
5634
5635 return 0;
5636}
5637
5638static int scsi_debug_abort(struct scsi_cmnd *SCpnt)
5639{
5640 bool ok = scsi_debug_abort_cmnd(SCpnt);
5641 u8 *cmd = SCpnt->cmnd;
5642 u8 opcode = cmd[0];
5643
5644 ++num_aborts;
5645
5646 if (SDEBUG_OPT_ALL_NOISE & sdebug_opts)
5647 sdev_printk(KERN_INFO, SCpnt->device,
5648 "%s: command%s found\n", __func__,
5649 ok ? "" : " not");
5650
5651 if (sdebug_fail_abort(SCpnt)) {
5652 scmd_printk(KERN_INFO, SCpnt, "fail abort command 0x%x\n",
5653 opcode);
5654 return FAILED;
5655 }
5656
5657 return SUCCESS;
5658}
5659
5660static bool scsi_debug_stop_all_queued_iter(struct request *rq, void *data)
5661{
5662 struct scsi_device *sdp = data;
5663 struct scsi_cmnd *scmd = blk_mq_rq_to_pdu(rq);
5664
5665 if (scmd->device == sdp)
5666 scsi_debug_abort_cmnd(scmd);
5667
5668 return true;
5669}
5670
5671/* Deletes (stops) timers or work queues of all queued commands per sdev */
5672static void scsi_debug_stop_all_queued(struct scsi_device *sdp)
5673{
5674 struct Scsi_Host *shost = sdp->host;
5675
5676 blk_mq_tagset_busy_iter(&shost->tag_set,
5677 scsi_debug_stop_all_queued_iter, sdp);
5678}
5679
5680static int sdebug_fail_lun_reset(struct scsi_cmnd *cmnd)
5681{
5682 struct scsi_device *sdp = cmnd->device;
5683 struct sdebug_dev_info *devip = (struct sdebug_dev_info *)sdp->hostdata;
5684 struct sdebug_err_inject *err;
5685 unsigned char *cmd = cmnd->cmnd;
5686 int ret = 0;
5687
5688 if (devip == NULL)
5689 return 0;
5690
5691 rcu_read_lock();
5692 list_for_each_entry_rcu(err, &devip->inject_err_list, list) {
5693 if (err->type == ERR_LUN_RESET_FAILED &&
5694 (err->cmd == cmd[0] || err->cmd == 0xff)) {
5695 ret = !!err->cnt;
5696 if (err->cnt < 0)
5697 err->cnt++;
5698
5699 rcu_read_unlock();
5700 return ret;
5701 }
5702 }
5703 rcu_read_unlock();
5704
5705 return 0;
5706}
5707
5708static int scsi_debug_device_reset(struct scsi_cmnd *SCpnt)
5709{
5710 struct scsi_device *sdp = SCpnt->device;
5711 struct sdebug_dev_info *devip = sdp->hostdata;
5712 u8 *cmd = SCpnt->cmnd;
5713 u8 opcode = cmd[0];
5714
5715 ++num_dev_resets;
5716
5717 if (SDEBUG_OPT_ALL_NOISE & sdebug_opts)
5718 sdev_printk(KERN_INFO, sdp, "%s\n", __func__);
5719
5720 scsi_debug_stop_all_queued(sdp);
5721 if (devip)
5722 set_bit(SDEBUG_UA_POR, devip->uas_bm);
5723
5724 if (sdebug_fail_lun_reset(SCpnt)) {
5725 scmd_printk(KERN_INFO, SCpnt, "fail lun reset 0x%x\n", opcode);
5726 return FAILED;
5727 }
5728
5729 return SUCCESS;
5730}
5731
5732static int sdebug_fail_target_reset(struct scsi_cmnd *cmnd)
5733{
5734 struct scsi_target *starget = scsi_target(cmnd->device);
5735 struct sdebug_target_info *targetip =
5736 (struct sdebug_target_info *)starget->hostdata;
5737
5738 if (targetip)
5739 return targetip->reset_fail;
5740
5741 return 0;
5742}
5743
5744static int scsi_debug_target_reset(struct scsi_cmnd *SCpnt)
5745{
5746 struct scsi_device *sdp = SCpnt->device;
5747 struct sdebug_host_info *sdbg_host = shost_to_sdebug_host(sdp->host);
5748 struct sdebug_dev_info *devip;
5749 u8 *cmd = SCpnt->cmnd;
5750 u8 opcode = cmd[0];
5751 int k = 0;
5752
5753 ++num_target_resets;
5754 if (SDEBUG_OPT_ALL_NOISE & sdebug_opts)
5755 sdev_printk(KERN_INFO, sdp, "%s\n", __func__);
5756
5757 list_for_each_entry(devip, &sdbg_host->dev_info_list, dev_list) {
5758 if (devip->target == sdp->id) {
5759 set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm);
5760 ++k;
5761 }
5762 }
5763
5764 if (SDEBUG_OPT_RESET_NOISE & sdebug_opts)
5765 sdev_printk(KERN_INFO, sdp,
5766 "%s: %d device(s) found in target\n", __func__, k);
5767
5768 if (sdebug_fail_target_reset(SCpnt)) {
5769 scmd_printk(KERN_INFO, SCpnt, "fail target reset 0x%x\n",
5770 opcode);
5771 return FAILED;
5772 }
5773
5774 return SUCCESS;
5775}
5776
5777static int scsi_debug_bus_reset(struct scsi_cmnd *SCpnt)
5778{
5779 struct scsi_device *sdp = SCpnt->device;
5780 struct sdebug_host_info *sdbg_host = shost_to_sdebug_host(sdp->host);
5781 struct sdebug_dev_info *devip;
5782 int k = 0;
5783
5784 ++num_bus_resets;
5785
5786 if (SDEBUG_OPT_ALL_NOISE & sdebug_opts)
5787 sdev_printk(KERN_INFO, sdp, "%s\n", __func__);
5788
5789 list_for_each_entry(devip, &sdbg_host->dev_info_list, dev_list) {
5790 set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm);
5791 ++k;
5792 }
5793
5794 if (SDEBUG_OPT_RESET_NOISE & sdebug_opts)
5795 sdev_printk(KERN_INFO, sdp,
5796 "%s: %d device(s) found in host\n", __func__, k);
5797 return SUCCESS;
5798}
5799
5800static int scsi_debug_host_reset(struct scsi_cmnd *SCpnt)
5801{
5802 struct sdebug_host_info *sdbg_host;
5803 struct sdebug_dev_info *devip;
5804 int k = 0;
5805
5806 ++num_host_resets;
5807 if (SDEBUG_OPT_ALL_NOISE & sdebug_opts)
5808 sdev_printk(KERN_INFO, SCpnt->device, "%s\n", __func__);
5809 mutex_lock(&sdebug_host_list_mutex);
5810 list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) {
5811 list_for_each_entry(devip, &sdbg_host->dev_info_list,
5812 dev_list) {
5813 set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm);
5814 ++k;
5815 }
5816 }
5817 mutex_unlock(&sdebug_host_list_mutex);
5818 stop_all_queued();
5819 if (SDEBUG_OPT_RESET_NOISE & sdebug_opts)
5820 sdev_printk(KERN_INFO, SCpnt->device,
5821 "%s: %d device(s) found\n", __func__, k);
5822 return SUCCESS;
5823}
5824
5825static void sdebug_build_parts(unsigned char *ramp, unsigned long store_size)
5826{
5827 struct msdos_partition *pp;
5828 int starts[SDEBUG_MAX_PARTS + 2], max_part_secs;
5829 int sectors_per_part, num_sectors, k;
5830 int heads_by_sects, start_sec, end_sec;
5831
5832 /* assume partition table already zeroed */
5833 if ((sdebug_num_parts < 1) || (store_size < 1048576))
5834 return;
5835 if (sdebug_num_parts > SDEBUG_MAX_PARTS) {
5836 sdebug_num_parts = SDEBUG_MAX_PARTS;
5837 pr_warn("reducing partitions to %d\n", SDEBUG_MAX_PARTS);
5838 }
5839 num_sectors = (int)get_sdebug_capacity();
5840 sectors_per_part = (num_sectors - sdebug_sectors_per)
5841 / sdebug_num_parts;
5842 heads_by_sects = sdebug_heads * sdebug_sectors_per;
5843 starts[0] = sdebug_sectors_per;
5844 max_part_secs = sectors_per_part;
5845 for (k = 1; k < sdebug_num_parts; ++k) {
5846 starts[k] = ((k * sectors_per_part) / heads_by_sects)
5847 * heads_by_sects;
5848 if (starts[k] - starts[k - 1] < max_part_secs)
5849 max_part_secs = starts[k] - starts[k - 1];
5850 }
5851 starts[sdebug_num_parts] = num_sectors;
5852 starts[sdebug_num_parts + 1] = 0;
5853
5854 ramp[510] = 0x55; /* magic partition markings */
5855 ramp[511] = 0xAA;
5856 pp = (struct msdos_partition *)(ramp + 0x1be);
5857 for (k = 0; starts[k + 1]; ++k, ++pp) {
5858 start_sec = starts[k];
5859 end_sec = starts[k] + max_part_secs - 1;
5860 pp->boot_ind = 0;
5861
5862 pp->cyl = start_sec / heads_by_sects;
5863 pp->head = (start_sec - (pp->cyl * heads_by_sects))
5864 / sdebug_sectors_per;
5865 pp->sector = (start_sec % sdebug_sectors_per) + 1;
5866
5867 pp->end_cyl = end_sec / heads_by_sects;
5868 pp->end_head = (end_sec - (pp->end_cyl * heads_by_sects))
5869 / sdebug_sectors_per;
5870 pp->end_sector = (end_sec % sdebug_sectors_per) + 1;
5871
5872 pp->start_sect = cpu_to_le32(start_sec);
5873 pp->nr_sects = cpu_to_le32(end_sec - start_sec + 1);
5874 pp->sys_ind = 0x83; /* plain Linux partition */
5875 }
5876}
5877
5878static void block_unblock_all_queues(bool block)
5879{
5880 struct sdebug_host_info *sdhp;
5881
5882 lockdep_assert_held(&sdebug_host_list_mutex);
5883
5884 list_for_each_entry(sdhp, &sdebug_host_list, host_list) {
5885 struct Scsi_Host *shost = sdhp->shost;
5886
5887 if (block)
5888 scsi_block_requests(shost);
5889 else
5890 scsi_unblock_requests(shost);
5891 }
5892}
5893
5894/* Adjust (by rounding down) the sdebug_cmnd_count so abs(every_nth)-1
5895 * commands will be processed normally before triggers occur.
5896 */
5897static void tweak_cmnd_count(void)
5898{
5899 int count, modulo;
5900
5901 modulo = abs(sdebug_every_nth);
5902 if (modulo < 2)
5903 return;
5904
5905 mutex_lock(&sdebug_host_list_mutex);
5906 block_unblock_all_queues(true);
5907 count = atomic_read(&sdebug_cmnd_count);
5908 atomic_set(&sdebug_cmnd_count, (count / modulo) * modulo);
5909 block_unblock_all_queues(false);
5910 mutex_unlock(&sdebug_host_list_mutex);
5911}
5912
5913static void clear_queue_stats(void)
5914{
5915 atomic_set(&sdebug_cmnd_count, 0);
5916 atomic_set(&sdebug_completions, 0);
5917 atomic_set(&sdebug_miss_cpus, 0);
5918 atomic_set(&sdebug_a_tsf, 0);
5919}
5920
5921static bool inject_on_this_cmd(void)
5922{
5923 if (sdebug_every_nth == 0)
5924 return false;
5925 return (atomic_read(&sdebug_cmnd_count) % abs(sdebug_every_nth)) == 0;
5926}
5927
5928#define INCLUSIVE_TIMING_MAX_NS 1000000 /* 1 millisecond */
5929
5930
5931void sdebug_free_queued_cmd(struct sdebug_queued_cmd *sqcp)
5932{
5933 if (sqcp)
5934 kmem_cache_free(queued_cmd_cache, sqcp);
5935}
5936
5937static struct sdebug_queued_cmd *sdebug_alloc_queued_cmd(struct scsi_cmnd *scmd)
5938{
5939 struct sdebug_queued_cmd *sqcp;
5940 struct sdebug_defer *sd_dp;
5941
5942 sqcp = kmem_cache_zalloc(queued_cmd_cache, GFP_ATOMIC);
5943 if (!sqcp)
5944 return NULL;
5945
5946 sd_dp = &sqcp->sd_dp;
5947
5948 hrtimer_init(&sd_dp->hrt, CLOCK_MONOTONIC, HRTIMER_MODE_REL_PINNED);
5949 sd_dp->hrt.function = sdebug_q_cmd_hrt_complete;
5950 INIT_WORK(&sd_dp->ew.work, sdebug_q_cmd_wq_complete);
5951
5952 sqcp->scmd = scmd;
5953
5954 return sqcp;
5955}
5956
5957/* Complete the processing of the thread that queued a SCSI command to this
5958 * driver. It either completes the command by calling cmnd_done() or
5959 * schedules a hr timer or work queue then returns 0. Returns
5960 * SCSI_MLQUEUE_HOST_BUSY if temporarily out of resources.
5961 */
5962static int schedule_resp(struct scsi_cmnd *cmnd, struct sdebug_dev_info *devip,
5963 int scsi_result,
5964 int (*pfp)(struct scsi_cmnd *,
5965 struct sdebug_dev_info *),
5966 int delta_jiff, int ndelay)
5967{
5968 struct request *rq = scsi_cmd_to_rq(cmnd);
5969 bool polled = rq->cmd_flags & REQ_POLLED;
5970 struct sdebug_scsi_cmd *sdsc = scsi_cmd_priv(cmnd);
5971 unsigned long flags;
5972 u64 ns_from_boot = 0;
5973 struct sdebug_queued_cmd *sqcp;
5974 struct scsi_device *sdp;
5975 struct sdebug_defer *sd_dp;
5976
5977 if (unlikely(devip == NULL)) {
5978 if (scsi_result == 0)
5979 scsi_result = DID_NO_CONNECT << 16;
5980 goto respond_in_thread;
5981 }
5982 sdp = cmnd->device;
5983
5984 if (delta_jiff == 0)
5985 goto respond_in_thread;
5986
5987
5988 if (unlikely(sdebug_every_nth && (SDEBUG_OPT_RARE_TSF & sdebug_opts) &&
5989 (scsi_result == 0))) {
5990 int num_in_q = scsi_device_busy(sdp);
5991 int qdepth = cmnd->device->queue_depth;
5992
5993 if ((num_in_q == qdepth) &&
5994 (atomic_inc_return(&sdebug_a_tsf) >=
5995 abs(sdebug_every_nth))) {
5996 atomic_set(&sdebug_a_tsf, 0);
5997 scsi_result = device_qfull_result;
5998
5999 if (unlikely(SDEBUG_OPT_Q_NOISE & sdebug_opts))
6000 sdev_printk(KERN_INFO, sdp, "%s: num_in_q=%d +1, <inject> status: TASK SET FULL\n",
6001 __func__, num_in_q);
6002 }
6003 }
6004
6005 sqcp = sdebug_alloc_queued_cmd(cmnd);
6006 if (!sqcp) {
6007 pr_err("%s no alloc\n", __func__);
6008 return SCSI_MLQUEUE_HOST_BUSY;
6009 }
6010 sd_dp = &sqcp->sd_dp;
6011
6012 if (polled)
6013 ns_from_boot = ktime_get_boottime_ns();
6014
6015 /* one of the resp_*() response functions is called here */
6016 cmnd->result = pfp ? pfp(cmnd, devip) : 0;
6017 if (cmnd->result & SDEG_RES_IMMED_MASK) {
6018 cmnd->result &= ~SDEG_RES_IMMED_MASK;
6019 delta_jiff = ndelay = 0;
6020 }
6021 if (cmnd->result == 0 && scsi_result != 0)
6022 cmnd->result = scsi_result;
6023 if (cmnd->result == 0 && unlikely(sdebug_opts & SDEBUG_OPT_TRANSPORT_ERR)) {
6024 if (atomic_read(&sdeb_inject_pending)) {
6025 mk_sense_buffer(cmnd, ABORTED_COMMAND, TRANSPORT_PROBLEM, ACK_NAK_TO);
6026 atomic_set(&sdeb_inject_pending, 0);
6027 cmnd->result = check_condition_result;
6028 }
6029 }
6030
6031 if (unlikely(sdebug_verbose && cmnd->result))
6032 sdev_printk(KERN_INFO, sdp, "%s: non-zero result=0x%x\n",
6033 __func__, cmnd->result);
6034
6035 if (delta_jiff > 0 || ndelay > 0) {
6036 ktime_t kt;
6037
6038 if (delta_jiff > 0) {
6039 u64 ns = jiffies_to_nsecs(delta_jiff);
6040
6041 if (sdebug_random && ns < U32_MAX) {
6042 ns = get_random_u32_below((u32)ns);
6043 } else if (sdebug_random) {
6044 ns >>= 12; /* scale to 4 usec precision */
6045 if (ns < U32_MAX) /* over 4 hours max */
6046 ns = get_random_u32_below((u32)ns);
6047 ns <<= 12;
6048 }
6049 kt = ns_to_ktime(ns);
6050 } else { /* ndelay has a 4.2 second max */
6051 kt = sdebug_random ? get_random_u32_below((u32)ndelay) :
6052 (u32)ndelay;
6053 if (ndelay < INCLUSIVE_TIMING_MAX_NS) {
6054 u64 d = ktime_get_boottime_ns() - ns_from_boot;
6055
6056 if (kt <= d) { /* elapsed duration >= kt */
6057 /* call scsi_done() from this thread */
6058 sdebug_free_queued_cmd(sqcp);
6059 scsi_done(cmnd);
6060 return 0;
6061 }
6062 /* otherwise reduce kt by elapsed time */
6063 kt -= d;
6064 }
6065 }
6066 if (sdebug_statistics)
6067 sd_dp->issuing_cpu = raw_smp_processor_id();
6068 if (polled) {
6069 spin_lock_irqsave(&sdsc->lock, flags);
6070 sd_dp->cmpl_ts = ktime_add(ns_to_ktime(ns_from_boot), kt);
6071 ASSIGN_QUEUED_CMD(cmnd, sqcp);
6072 WRITE_ONCE(sd_dp->defer_t, SDEB_DEFER_POLL);
6073 spin_unlock_irqrestore(&sdsc->lock, flags);
6074 } else {
6075 /* schedule the invocation of scsi_done() for a later time */
6076 spin_lock_irqsave(&sdsc->lock, flags);
6077 ASSIGN_QUEUED_CMD(cmnd, sqcp);
6078 WRITE_ONCE(sd_dp->defer_t, SDEB_DEFER_HRT);
6079 hrtimer_start(&sd_dp->hrt, kt, HRTIMER_MODE_REL_PINNED);
6080 /*
6081 * The completion handler will try to grab sqcp->lock,
6082 * so there is no chance that the completion handler
6083 * will call scsi_done() until we release the lock
6084 * here (so ok to keep referencing sdsc).
6085 */
6086 spin_unlock_irqrestore(&sdsc->lock, flags);
6087 }
6088 } else { /* jdelay < 0, use work queue */
6089 if (unlikely((sdebug_opts & SDEBUG_OPT_CMD_ABORT) &&
6090 atomic_read(&sdeb_inject_pending))) {
6091 sd_dp->aborted = true;
6092 atomic_set(&sdeb_inject_pending, 0);
6093 sdev_printk(KERN_INFO, sdp, "abort request tag=%#x\n",
6094 blk_mq_unique_tag_to_tag(get_tag(cmnd)));
6095 }
6096
6097 if (sdebug_statistics)
6098 sd_dp->issuing_cpu = raw_smp_processor_id();
6099 if (polled) {
6100 spin_lock_irqsave(&sdsc->lock, flags);
6101 ASSIGN_QUEUED_CMD(cmnd, sqcp);
6102 sd_dp->cmpl_ts = ns_to_ktime(ns_from_boot);
6103 WRITE_ONCE(sd_dp->defer_t, SDEB_DEFER_POLL);
6104 spin_unlock_irqrestore(&sdsc->lock, flags);
6105 } else {
6106 spin_lock_irqsave(&sdsc->lock, flags);
6107 ASSIGN_QUEUED_CMD(cmnd, sqcp);
6108 WRITE_ONCE(sd_dp->defer_t, SDEB_DEFER_WQ);
6109 schedule_work(&sd_dp->ew.work);
6110 spin_unlock_irqrestore(&sdsc->lock, flags);
6111 }
6112 }
6113
6114 return 0;
6115
6116respond_in_thread: /* call back to mid-layer using invocation thread */
6117 cmnd->result = pfp != NULL ? pfp(cmnd, devip) : 0;
6118 cmnd->result &= ~SDEG_RES_IMMED_MASK;
6119 if (cmnd->result == 0 && scsi_result != 0)
6120 cmnd->result = scsi_result;
6121 scsi_done(cmnd);
6122 return 0;
6123}
6124
6125/* Note: The following macros create attribute files in the
6126 /sys/module/scsi_debug/parameters directory. Unfortunately this
6127 driver is unaware of a change and cannot trigger auxiliary actions
6128 as it can when the corresponding attribute in the
6129 /sys/bus/pseudo/drivers/scsi_debug directory is changed.
6130 */
6131module_param_named(add_host, sdebug_add_host, int, S_IRUGO | S_IWUSR);
6132module_param_named(ato, sdebug_ato, int, S_IRUGO);
6133module_param_named(cdb_len, sdebug_cdb_len, int, 0644);
6134module_param_named(clustering, sdebug_clustering, bool, S_IRUGO | S_IWUSR);
6135module_param_named(delay, sdebug_jdelay, int, S_IRUGO | S_IWUSR);
6136module_param_named(dev_size_mb, sdebug_dev_size_mb, int, S_IRUGO);
6137module_param_named(dif, sdebug_dif, int, S_IRUGO);
6138module_param_named(dix, sdebug_dix, int, S_IRUGO);
6139module_param_named(dsense, sdebug_dsense, int, S_IRUGO | S_IWUSR);
6140module_param_named(every_nth, sdebug_every_nth, int, S_IRUGO | S_IWUSR);
6141module_param_named(fake_rw, sdebug_fake_rw, int, S_IRUGO | S_IWUSR);
6142module_param_named(guard, sdebug_guard, uint, S_IRUGO);
6143module_param_named(host_lock, sdebug_host_lock, bool, S_IRUGO | S_IWUSR);
6144module_param_named(host_max_queue, sdebug_host_max_queue, int, S_IRUGO);
6145module_param_string(inq_product, sdebug_inq_product_id,
6146 sizeof(sdebug_inq_product_id), S_IRUGO | S_IWUSR);
6147module_param_string(inq_rev, sdebug_inq_product_rev,
6148 sizeof(sdebug_inq_product_rev), S_IRUGO | S_IWUSR);
6149module_param_string(inq_vendor, sdebug_inq_vendor_id,
6150 sizeof(sdebug_inq_vendor_id), S_IRUGO | S_IWUSR);
6151module_param_named(lbprz, sdebug_lbprz, int, S_IRUGO);
6152module_param_named(lbpu, sdebug_lbpu, int, S_IRUGO);
6153module_param_named(lbpws, sdebug_lbpws, int, S_IRUGO);
6154module_param_named(lbpws10, sdebug_lbpws10, int, S_IRUGO);
6155module_param_named(lowest_aligned, sdebug_lowest_aligned, int, S_IRUGO);
6156module_param_named(lun_format, sdebug_lun_am_i, int, S_IRUGO | S_IWUSR);
6157module_param_named(max_luns, sdebug_max_luns, int, S_IRUGO | S_IWUSR);
6158module_param_named(max_queue, sdebug_max_queue, int, S_IRUGO | S_IWUSR);
6159module_param_named(medium_error_count, sdebug_medium_error_count, int,
6160 S_IRUGO | S_IWUSR);
6161module_param_named(medium_error_start, sdebug_medium_error_start, int,
6162 S_IRUGO | S_IWUSR);
6163module_param_named(ndelay, sdebug_ndelay, int, S_IRUGO | S_IWUSR);
6164module_param_named(no_lun_0, sdebug_no_lun_0, int, S_IRUGO | S_IWUSR);
6165module_param_named(no_rwlock, sdebug_no_rwlock, bool, S_IRUGO | S_IWUSR);
6166module_param_named(no_uld, sdebug_no_uld, int, S_IRUGO);
6167module_param_named(num_parts, sdebug_num_parts, int, S_IRUGO);
6168module_param_named(num_tgts, sdebug_num_tgts, int, S_IRUGO | S_IWUSR);
6169module_param_named(opt_blks, sdebug_opt_blks, int, S_IRUGO);
6170module_param_named(opt_xferlen_exp, sdebug_opt_xferlen_exp, int, S_IRUGO);
6171module_param_named(opts, sdebug_opts, int, S_IRUGO | S_IWUSR);
6172module_param_named(per_host_store, sdebug_per_host_store, bool,
6173 S_IRUGO | S_IWUSR);
6174module_param_named(physblk_exp, sdebug_physblk_exp, int, S_IRUGO);
6175module_param_named(ptype, sdebug_ptype, int, S_IRUGO | S_IWUSR);
6176module_param_named(random, sdebug_random, bool, S_IRUGO | S_IWUSR);
6177module_param_named(removable, sdebug_removable, bool, S_IRUGO | S_IWUSR);
6178module_param_named(scsi_level, sdebug_scsi_level, int, S_IRUGO);
6179module_param_named(sector_size, sdebug_sector_size, int, S_IRUGO);
6180module_param_named(statistics, sdebug_statistics, bool, S_IRUGO | S_IWUSR);
6181module_param_named(strict, sdebug_strict, bool, S_IRUGO | S_IWUSR);
6182module_param_named(submit_queues, submit_queues, int, S_IRUGO);
6183module_param_named(poll_queues, poll_queues, int, S_IRUGO);
6184module_param_named(tur_ms_to_ready, sdeb_tur_ms_to_ready, int, S_IRUGO);
6185module_param_named(unmap_alignment, sdebug_unmap_alignment, int, S_IRUGO);
6186module_param_named(unmap_granularity, sdebug_unmap_granularity, int, S_IRUGO);
6187module_param_named(unmap_max_blocks, sdebug_unmap_max_blocks, int, S_IRUGO);
6188module_param_named(unmap_max_desc, sdebug_unmap_max_desc, int, S_IRUGO);
6189module_param_named(uuid_ctl, sdebug_uuid_ctl, int, S_IRUGO);
6190module_param_named(virtual_gb, sdebug_virtual_gb, int, S_IRUGO | S_IWUSR);
6191module_param_named(vpd_use_hostno, sdebug_vpd_use_hostno, int,
6192 S_IRUGO | S_IWUSR);
6193module_param_named(wp, sdebug_wp, bool, S_IRUGO | S_IWUSR);
6194module_param_named(write_same_length, sdebug_write_same_length, int,
6195 S_IRUGO | S_IWUSR);
6196module_param_named(zbc, sdeb_zbc_model_s, charp, S_IRUGO);
6197module_param_named(zone_cap_mb, sdeb_zbc_zone_cap_mb, int, S_IRUGO);
6198module_param_named(zone_max_open, sdeb_zbc_max_open, int, S_IRUGO);
6199module_param_named(zone_nr_conv, sdeb_zbc_nr_conv, int, S_IRUGO);
6200module_param_named(zone_size_mb, sdeb_zbc_zone_size_mb, int, S_IRUGO);
6201module_param_named(allow_restart, sdebug_allow_restart, bool, S_IRUGO | S_IWUSR);
6202
6203MODULE_AUTHOR("Eric Youngdale + Douglas Gilbert");
6204MODULE_DESCRIPTION("SCSI debug adapter driver");
6205MODULE_LICENSE("GPL");
6206MODULE_VERSION(SDEBUG_VERSION);
6207
6208MODULE_PARM_DESC(add_host, "add n hosts, in sysfs if negative remove host(s) (def=1)");
6209MODULE_PARM_DESC(ato, "application tag ownership: 0=disk 1=host (def=1)");
6210MODULE_PARM_DESC(cdb_len, "suggest CDB lengths to drivers (def=10)");
6211MODULE_PARM_DESC(clustering, "when set enables larger transfers (def=0)");
6212MODULE_PARM_DESC(delay, "response delay (def=1 jiffy); 0:imm, -1,-2:tiny");
6213MODULE_PARM_DESC(dev_size_mb, "size in MiB of ram shared by devs(def=8)");
6214MODULE_PARM_DESC(dif, "data integrity field type: 0-3 (def=0)");
6215MODULE_PARM_DESC(dix, "data integrity extensions mask (def=0)");
6216MODULE_PARM_DESC(dsense, "use descriptor sense format(def=0 -> fixed)");
6217MODULE_PARM_DESC(every_nth, "timeout every nth command(def=0)");
6218MODULE_PARM_DESC(fake_rw, "fake reads/writes instead of copying (def=0)");
6219MODULE_PARM_DESC(guard, "protection checksum: 0=crc, 1=ip (def=0)");
6220MODULE_PARM_DESC(host_lock, "host_lock is ignored (def=0)");
6221MODULE_PARM_DESC(host_max_queue,
6222 "host max # of queued cmds (0 to max(def) [max_queue fixed equal for !0])");
6223MODULE_PARM_DESC(inq_product, "SCSI INQUIRY product string (def=\"scsi_debug\")");
6224MODULE_PARM_DESC(inq_rev, "SCSI INQUIRY revision string (def=\""
6225 SDEBUG_VERSION "\")");
6226MODULE_PARM_DESC(inq_vendor, "SCSI INQUIRY vendor string (def=\"Linux\")");
6227MODULE_PARM_DESC(lbprz,
6228 "on read unmapped LBs return 0 when 1 (def), return 0xff when 2");
6229MODULE_PARM_DESC(lbpu, "enable LBP, support UNMAP command (def=0)");
6230MODULE_PARM_DESC(lbpws, "enable LBP, support WRITE SAME(16) with UNMAP bit (def=0)");
6231MODULE_PARM_DESC(lbpws10, "enable LBP, support WRITE SAME(10) with UNMAP bit (def=0)");
6232MODULE_PARM_DESC(lowest_aligned, "lowest aligned lba (def=0)");
6233MODULE_PARM_DESC(lun_format, "LUN format: 0->peripheral (def); 1 --> flat address method");
6234MODULE_PARM_DESC(max_luns, "number of LUNs per target to simulate(def=1)");
6235MODULE_PARM_DESC(max_queue, "max number of queued commands (1 to max(def))");
6236MODULE_PARM_DESC(medium_error_count, "count of sectors to return follow on MEDIUM error");
6237MODULE_PARM_DESC(medium_error_start, "starting sector number to return MEDIUM error");
6238MODULE_PARM_DESC(ndelay, "response delay in nanoseconds (def=0 -> ignore)");
6239MODULE_PARM_DESC(no_lun_0, "no LU number 0 (def=0 -> have lun 0)");
6240MODULE_PARM_DESC(no_rwlock, "don't protect user data reads+writes (def=0)");
6241MODULE_PARM_DESC(no_uld, "stop ULD (e.g. sd driver) attaching (def=0))");
6242MODULE_PARM_DESC(num_parts, "number of partitions(def=0)");
6243MODULE_PARM_DESC(num_tgts, "number of targets per host to simulate(def=1)");
6244MODULE_PARM_DESC(opt_blks, "optimal transfer length in blocks (def=1024)");
6245MODULE_PARM_DESC(opt_xferlen_exp, "optimal transfer length granularity exponent (def=physblk_exp)");
6246MODULE_PARM_DESC(opts, "1->noise, 2->medium_err, 4->timeout, 8->recovered_err... (def=0)");
6247MODULE_PARM_DESC(per_host_store, "If set, next positive add_host will get new store (def=0)");
6248MODULE_PARM_DESC(physblk_exp, "physical block exponent (def=0)");
6249MODULE_PARM_DESC(poll_queues, "support for iouring iopoll queues (1 to max(submit_queues - 1))");
6250MODULE_PARM_DESC(ptype, "SCSI peripheral type(def=0[disk])");
6251MODULE_PARM_DESC(random, "If set, uniformly randomize command duration between 0 and delay_in_ns");
6252MODULE_PARM_DESC(removable, "claim to have removable media (def=0)");
6253MODULE_PARM_DESC(scsi_level, "SCSI level to simulate(def=7[SPC-5])");
6254MODULE_PARM_DESC(sector_size, "logical block size in bytes (def=512)");
6255MODULE_PARM_DESC(statistics, "collect statistics on commands, queues (def=0)");
6256MODULE_PARM_DESC(strict, "stricter checks: reserved field in cdb (def=0)");
6257MODULE_PARM_DESC(submit_queues, "support for block multi-queue (def=1)");
6258MODULE_PARM_DESC(tur_ms_to_ready, "TEST UNIT READY millisecs before initial good status (def=0)");
6259MODULE_PARM_DESC(unmap_alignment, "lowest aligned thin provisioning lba (def=0)");
6260MODULE_PARM_DESC(unmap_granularity, "thin provisioning granularity in blocks (def=1)");
6261MODULE_PARM_DESC(unmap_max_blocks, "max # of blocks can be unmapped in one cmd (def=0xffffffff)");
6262MODULE_PARM_DESC(unmap_max_desc, "max # of ranges that can be unmapped in one cmd (def=256)");
6263MODULE_PARM_DESC(uuid_ctl,
6264 "1->use uuid for lu name, 0->don't, 2->all use same (def=0)");
6265MODULE_PARM_DESC(virtual_gb, "virtual gigabyte (GiB) size (def=0 -> use dev_size_mb)");
6266MODULE_PARM_DESC(vpd_use_hostno, "0 -> dev ids ignore hostno (def=1 -> unique dev ids)");
6267MODULE_PARM_DESC(wp, "Write Protect (def=0)");
6268MODULE_PARM_DESC(write_same_length, "Maximum blocks per WRITE SAME cmd (def=0xffff)");
6269MODULE_PARM_DESC(zbc, "'none' [0]; 'aware' [1]; 'managed' [2] (def=0). Can have 'host-' prefix");
6270MODULE_PARM_DESC(zone_cap_mb, "Zone capacity in MiB (def=zone size)");
6271MODULE_PARM_DESC(zone_max_open, "Maximum number of open zones; [0] for no limit (def=auto)");
6272MODULE_PARM_DESC(zone_nr_conv, "Number of conventional zones (def=1)");
6273MODULE_PARM_DESC(zone_size_mb, "Zone size in MiB (def=auto)");
6274MODULE_PARM_DESC(allow_restart, "Set scsi_device's allow_restart flag(def=0)");
6275
6276#define SDEBUG_INFO_LEN 256
6277static char sdebug_info[SDEBUG_INFO_LEN];
6278
6279static const char *scsi_debug_info(struct Scsi_Host *shp)
6280{
6281 int k;
6282
6283 k = scnprintf(sdebug_info, SDEBUG_INFO_LEN, "%s: version %s [%s]\n",
6284 my_name, SDEBUG_VERSION, sdebug_version_date);
6285 if (k >= (SDEBUG_INFO_LEN - 1))
6286 return sdebug_info;
6287 scnprintf(sdebug_info + k, SDEBUG_INFO_LEN - k,
6288 " dev_size_mb=%d, opts=0x%x, submit_queues=%d, %s=%d",
6289 sdebug_dev_size_mb, sdebug_opts, submit_queues,
6290 "statistics", (int)sdebug_statistics);
6291 return sdebug_info;
6292}
6293
6294/* 'echo <val> > /proc/scsi/scsi_debug/<host_id>' writes to opts */
6295static int scsi_debug_write_info(struct Scsi_Host *host, char *buffer,
6296 int length)
6297{
6298 char arr[16];
6299 int opts;
6300 int minLen = length > 15 ? 15 : length;
6301
6302 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
6303 return -EACCES;
6304 memcpy(arr, buffer, minLen);
6305 arr[minLen] = '\0';
6306 if (1 != sscanf(arr, "%d", &opts))
6307 return -EINVAL;
6308 sdebug_opts = opts;
6309 sdebug_verbose = !!(SDEBUG_OPT_NOISE & opts);
6310 sdebug_any_injecting_opt = !!(SDEBUG_OPT_ALL_INJECTING & opts);
6311 if (sdebug_every_nth != 0)
6312 tweak_cmnd_count();
6313 return length;
6314}
6315
6316struct sdebug_submit_queue_data {
6317 int *first;
6318 int *last;
6319 int queue_num;
6320};
6321
6322static bool sdebug_submit_queue_iter(struct request *rq, void *opaque)
6323{
6324 struct sdebug_submit_queue_data *data = opaque;
6325 u32 unique_tag = blk_mq_unique_tag(rq);
6326 u16 hwq = blk_mq_unique_tag_to_hwq(unique_tag);
6327 u16 tag = blk_mq_unique_tag_to_tag(unique_tag);
6328 int queue_num = data->queue_num;
6329
6330 if (hwq != queue_num)
6331 return true;
6332
6333 /* Rely on iter'ing in ascending tag order */
6334 if (*data->first == -1)
6335 *data->first = *data->last = tag;
6336 else
6337 *data->last = tag;
6338
6339 return true;
6340}
6341
6342/* Output seen with 'cat /proc/scsi/scsi_debug/<host_id>'. It will be the
6343 * same for each scsi_debug host (if more than one). Some of the counters
6344 * output are not atomics so might be inaccurate in a busy system. */
6345static int scsi_debug_show_info(struct seq_file *m, struct Scsi_Host *host)
6346{
6347 struct sdebug_host_info *sdhp;
6348 int j;
6349
6350 seq_printf(m, "scsi_debug adapter driver, version %s [%s]\n",
6351 SDEBUG_VERSION, sdebug_version_date);
6352 seq_printf(m, "num_tgts=%d, %ssize=%d MB, opts=0x%x, every_nth=%d\n",
6353 sdebug_num_tgts, "shared (ram) ", sdebug_dev_size_mb,
6354 sdebug_opts, sdebug_every_nth);
6355 seq_printf(m, "delay=%d, ndelay=%d, max_luns=%d, sector_size=%d %s\n",
6356 sdebug_jdelay, sdebug_ndelay, sdebug_max_luns,
6357 sdebug_sector_size, "bytes");
6358 seq_printf(m, "cylinders=%d, heads=%d, sectors=%d, command aborts=%d\n",
6359 sdebug_cylinders_per, sdebug_heads, sdebug_sectors_per,
6360 num_aborts);
6361 seq_printf(m, "RESETs: device=%d, target=%d, bus=%d, host=%d\n",
6362 num_dev_resets, num_target_resets, num_bus_resets,
6363 num_host_resets);
6364 seq_printf(m, "dix_reads=%d, dix_writes=%d, dif_errors=%d\n",
6365 dix_reads, dix_writes, dif_errors);
6366 seq_printf(m, "usec_in_jiffy=%lu, statistics=%d\n", TICK_NSEC / 1000,
6367 sdebug_statistics);
6368 seq_printf(m, "cmnd_count=%d, completions=%d, %s=%d, a_tsf=%d, mq_polls=%d\n",
6369 atomic_read(&sdebug_cmnd_count),
6370 atomic_read(&sdebug_completions),
6371 "miss_cpus", atomic_read(&sdebug_miss_cpus),
6372 atomic_read(&sdebug_a_tsf),
6373 atomic_read(&sdeb_mq_poll_count));
6374
6375 seq_printf(m, "submit_queues=%d\n", submit_queues);
6376 for (j = 0; j < submit_queues; ++j) {
6377 int f = -1, l = -1;
6378 struct sdebug_submit_queue_data data = {
6379 .queue_num = j,
6380 .first = &f,
6381 .last = &l,
6382 };
6383 seq_printf(m, " queue %d:\n", j);
6384 blk_mq_tagset_busy_iter(&host->tag_set, sdebug_submit_queue_iter,
6385 &data);
6386 if (f >= 0) {
6387 seq_printf(m, " in_use_bm BUSY: %s: %d,%d\n",
6388 "first,last bits", f, l);
6389 }
6390 }
6391
6392 seq_printf(m, "this host_no=%d\n", host->host_no);
6393 if (!xa_empty(per_store_ap)) {
6394 bool niu;
6395 int idx;
6396 unsigned long l_idx;
6397 struct sdeb_store_info *sip;
6398
6399 seq_puts(m, "\nhost list:\n");
6400 j = 0;
6401 list_for_each_entry(sdhp, &sdebug_host_list, host_list) {
6402 idx = sdhp->si_idx;
6403 seq_printf(m, " %d: host_no=%d, si_idx=%d\n", j,
6404 sdhp->shost->host_no, idx);
6405 ++j;
6406 }
6407 seq_printf(m, "\nper_store array [most_recent_idx=%d]:\n",
6408 sdeb_most_recent_idx);
6409 j = 0;
6410 xa_for_each(per_store_ap, l_idx, sip) {
6411 niu = xa_get_mark(per_store_ap, l_idx,
6412 SDEB_XA_NOT_IN_USE);
6413 idx = (int)l_idx;
6414 seq_printf(m, " %d: idx=%d%s\n", j, idx,
6415 (niu ? " not_in_use" : ""));
6416 ++j;
6417 }
6418 }
6419 return 0;
6420}
6421
6422static ssize_t delay_show(struct device_driver *ddp, char *buf)
6423{
6424 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_jdelay);
6425}
6426/* Returns -EBUSY if jdelay is being changed and commands are queued. The unit
6427 * of delay is jiffies.
6428 */
6429static ssize_t delay_store(struct device_driver *ddp, const char *buf,
6430 size_t count)
6431{
6432 int jdelay, res;
6433
6434 if (count > 0 && sscanf(buf, "%d", &jdelay) == 1) {
6435 res = count;
6436 if (sdebug_jdelay != jdelay) {
6437 struct sdebug_host_info *sdhp;
6438
6439 mutex_lock(&sdebug_host_list_mutex);
6440 block_unblock_all_queues(true);
6441
6442 list_for_each_entry(sdhp, &sdebug_host_list, host_list) {
6443 struct Scsi_Host *shost = sdhp->shost;
6444
6445 if (scsi_host_busy(shost)) {
6446 res = -EBUSY; /* queued commands */
6447 break;
6448 }
6449 }
6450 if (res > 0) {
6451 sdebug_jdelay = jdelay;
6452 sdebug_ndelay = 0;
6453 }
6454 block_unblock_all_queues(false);
6455 mutex_unlock(&sdebug_host_list_mutex);
6456 }
6457 return res;
6458 }
6459 return -EINVAL;
6460}
6461static DRIVER_ATTR_RW(delay);
6462
6463static ssize_t ndelay_show(struct device_driver *ddp, char *buf)
6464{
6465 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_ndelay);
6466}
6467/* Returns -EBUSY if ndelay is being changed and commands are queued */
6468/* If > 0 and accepted then sdebug_jdelay is set to JDELAY_OVERRIDDEN */
6469static ssize_t ndelay_store(struct device_driver *ddp, const char *buf,
6470 size_t count)
6471{
6472 int ndelay, res;
6473
6474 if ((count > 0) && (1 == sscanf(buf, "%d", &ndelay)) &&
6475 (ndelay >= 0) && (ndelay < (1000 * 1000 * 1000))) {
6476 res = count;
6477 if (sdebug_ndelay != ndelay) {
6478 struct sdebug_host_info *sdhp;
6479
6480 mutex_lock(&sdebug_host_list_mutex);
6481 block_unblock_all_queues(true);
6482
6483 list_for_each_entry(sdhp, &sdebug_host_list, host_list) {
6484 struct Scsi_Host *shost = sdhp->shost;
6485
6486 if (scsi_host_busy(shost)) {
6487 res = -EBUSY; /* queued commands */
6488 break;
6489 }
6490 }
6491
6492 if (res > 0) {
6493 sdebug_ndelay = ndelay;
6494 sdebug_jdelay = ndelay ? JDELAY_OVERRIDDEN
6495 : DEF_JDELAY;
6496 }
6497 block_unblock_all_queues(false);
6498 mutex_unlock(&sdebug_host_list_mutex);
6499 }
6500 return res;
6501 }
6502 return -EINVAL;
6503}
6504static DRIVER_ATTR_RW(ndelay);
6505
6506static ssize_t opts_show(struct device_driver *ddp, char *buf)
6507{
6508 return scnprintf(buf, PAGE_SIZE, "0x%x\n", sdebug_opts);
6509}
6510
6511static ssize_t opts_store(struct device_driver *ddp, const char *buf,
6512 size_t count)
6513{
6514 int opts;
6515 char work[20];
6516
6517 if (sscanf(buf, "%10s", work) == 1) {
6518 if (strncasecmp(work, "0x", 2) == 0) {
6519 if (kstrtoint(work + 2, 16, &opts) == 0)
6520 goto opts_done;
6521 } else {
6522 if (kstrtoint(work, 10, &opts) == 0)
6523 goto opts_done;
6524 }
6525 }
6526 return -EINVAL;
6527opts_done:
6528 sdebug_opts = opts;
6529 sdebug_verbose = !!(SDEBUG_OPT_NOISE & opts);
6530 sdebug_any_injecting_opt = !!(SDEBUG_OPT_ALL_INJECTING & opts);
6531 tweak_cmnd_count();
6532 return count;
6533}
6534static DRIVER_ATTR_RW(opts);
6535
6536static ssize_t ptype_show(struct device_driver *ddp, char *buf)
6537{
6538 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_ptype);
6539}
6540static ssize_t ptype_store(struct device_driver *ddp, const char *buf,
6541 size_t count)
6542{
6543 int n;
6544
6545 /* Cannot change from or to TYPE_ZBC with sysfs */
6546 if (sdebug_ptype == TYPE_ZBC)
6547 return -EINVAL;
6548
6549 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
6550 if (n == TYPE_ZBC)
6551 return -EINVAL;
6552 sdebug_ptype = n;
6553 return count;
6554 }
6555 return -EINVAL;
6556}
6557static DRIVER_ATTR_RW(ptype);
6558
6559static ssize_t dsense_show(struct device_driver *ddp, char *buf)
6560{
6561 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_dsense);
6562}
6563static ssize_t dsense_store(struct device_driver *ddp, const char *buf,
6564 size_t count)
6565{
6566 int n;
6567
6568 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
6569 sdebug_dsense = n;
6570 return count;
6571 }
6572 return -EINVAL;
6573}
6574static DRIVER_ATTR_RW(dsense);
6575
6576static ssize_t fake_rw_show(struct device_driver *ddp, char *buf)
6577{
6578 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_fake_rw);
6579}
6580static ssize_t fake_rw_store(struct device_driver *ddp, const char *buf,
6581 size_t count)
6582{
6583 int n, idx;
6584
6585 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
6586 bool want_store = (n == 0);
6587 struct sdebug_host_info *sdhp;
6588
6589 n = (n > 0);
6590 sdebug_fake_rw = (sdebug_fake_rw > 0);
6591 if (sdebug_fake_rw == n)
6592 return count; /* not transitioning so do nothing */
6593
6594 if (want_store) { /* 1 --> 0 transition, set up store */
6595 if (sdeb_first_idx < 0) {
6596 idx = sdebug_add_store();
6597 if (idx < 0)
6598 return idx;
6599 } else {
6600 idx = sdeb_first_idx;
6601 xa_clear_mark(per_store_ap, idx,
6602 SDEB_XA_NOT_IN_USE);
6603 }
6604 /* make all hosts use same store */
6605 list_for_each_entry(sdhp, &sdebug_host_list,
6606 host_list) {
6607 if (sdhp->si_idx != idx) {
6608 xa_set_mark(per_store_ap, sdhp->si_idx,
6609 SDEB_XA_NOT_IN_USE);
6610 sdhp->si_idx = idx;
6611 }
6612 }
6613 sdeb_most_recent_idx = idx;
6614 } else { /* 0 --> 1 transition is trigger for shrink */
6615 sdebug_erase_all_stores(true /* apart from first */);
6616 }
6617 sdebug_fake_rw = n;
6618 return count;
6619 }
6620 return -EINVAL;
6621}
6622static DRIVER_ATTR_RW(fake_rw);
6623
6624static ssize_t no_lun_0_show(struct device_driver *ddp, char *buf)
6625{
6626 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_no_lun_0);
6627}
6628static ssize_t no_lun_0_store(struct device_driver *ddp, const char *buf,
6629 size_t count)
6630{
6631 int n;
6632
6633 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
6634 sdebug_no_lun_0 = n;
6635 return count;
6636 }
6637 return -EINVAL;
6638}
6639static DRIVER_ATTR_RW(no_lun_0);
6640
6641static ssize_t num_tgts_show(struct device_driver *ddp, char *buf)
6642{
6643 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_num_tgts);
6644}
6645static ssize_t num_tgts_store(struct device_driver *ddp, const char *buf,
6646 size_t count)
6647{
6648 int n;
6649
6650 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
6651 sdebug_num_tgts = n;
6652 sdebug_max_tgts_luns();
6653 return count;
6654 }
6655 return -EINVAL;
6656}
6657static DRIVER_ATTR_RW(num_tgts);
6658
6659static ssize_t dev_size_mb_show(struct device_driver *ddp, char *buf)
6660{
6661 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_dev_size_mb);
6662}
6663static DRIVER_ATTR_RO(dev_size_mb);
6664
6665static ssize_t per_host_store_show(struct device_driver *ddp, char *buf)
6666{
6667 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_per_host_store);
6668}
6669
6670static ssize_t per_host_store_store(struct device_driver *ddp, const char *buf,
6671 size_t count)
6672{
6673 bool v;
6674
6675 if (kstrtobool(buf, &v))
6676 return -EINVAL;
6677
6678 sdebug_per_host_store = v;
6679 return count;
6680}
6681static DRIVER_ATTR_RW(per_host_store);
6682
6683static ssize_t num_parts_show(struct device_driver *ddp, char *buf)
6684{
6685 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_num_parts);
6686}
6687static DRIVER_ATTR_RO(num_parts);
6688
6689static ssize_t every_nth_show(struct device_driver *ddp, char *buf)
6690{
6691 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_every_nth);
6692}
6693static ssize_t every_nth_store(struct device_driver *ddp, const char *buf,
6694 size_t count)
6695{
6696 int nth;
6697 char work[20];
6698
6699 if (sscanf(buf, "%10s", work) == 1) {
6700 if (strncasecmp(work, "0x", 2) == 0) {
6701 if (kstrtoint(work + 2, 16, &nth) == 0)
6702 goto every_nth_done;
6703 } else {
6704 if (kstrtoint(work, 10, &nth) == 0)
6705 goto every_nth_done;
6706 }
6707 }
6708 return -EINVAL;
6709
6710every_nth_done:
6711 sdebug_every_nth = nth;
6712 if (nth && !sdebug_statistics) {
6713 pr_info("every_nth needs statistics=1, set it\n");
6714 sdebug_statistics = true;
6715 }
6716 tweak_cmnd_count();
6717 return count;
6718}
6719static DRIVER_ATTR_RW(every_nth);
6720
6721static ssize_t lun_format_show(struct device_driver *ddp, char *buf)
6722{
6723 return scnprintf(buf, PAGE_SIZE, "%d\n", (int)sdebug_lun_am);
6724}
6725static ssize_t lun_format_store(struct device_driver *ddp, const char *buf,
6726 size_t count)
6727{
6728 int n;
6729 bool changed;
6730
6731 if (kstrtoint(buf, 0, &n))
6732 return -EINVAL;
6733 if (n >= 0) {
6734 if (n > (int)SAM_LUN_AM_FLAT) {
6735 pr_warn("only LUN address methods 0 and 1 are supported\n");
6736 return -EINVAL;
6737 }
6738 changed = ((int)sdebug_lun_am != n);
6739 sdebug_lun_am = n;
6740 if (changed && sdebug_scsi_level >= 5) { /* >= SPC-3 */
6741 struct sdebug_host_info *sdhp;
6742 struct sdebug_dev_info *dp;
6743
6744 mutex_lock(&sdebug_host_list_mutex);
6745 list_for_each_entry(sdhp, &sdebug_host_list, host_list) {
6746 list_for_each_entry(dp, &sdhp->dev_info_list, dev_list) {
6747 set_bit(SDEBUG_UA_LUNS_CHANGED, dp->uas_bm);
6748 }
6749 }
6750 mutex_unlock(&sdebug_host_list_mutex);
6751 }
6752 return count;
6753 }
6754 return -EINVAL;
6755}
6756static DRIVER_ATTR_RW(lun_format);
6757
6758static ssize_t max_luns_show(struct device_driver *ddp, char *buf)
6759{
6760 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_max_luns);
6761}
6762static ssize_t max_luns_store(struct device_driver *ddp, const char *buf,
6763 size_t count)
6764{
6765 int n;
6766 bool changed;
6767
6768 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
6769 if (n > 256) {
6770 pr_warn("max_luns can be no more than 256\n");
6771 return -EINVAL;
6772 }
6773 changed = (sdebug_max_luns != n);
6774 sdebug_max_luns = n;
6775 sdebug_max_tgts_luns();
6776 if (changed && (sdebug_scsi_level >= 5)) { /* >= SPC-3 */
6777 struct sdebug_host_info *sdhp;
6778 struct sdebug_dev_info *dp;
6779
6780 mutex_lock(&sdebug_host_list_mutex);
6781 list_for_each_entry(sdhp, &sdebug_host_list,
6782 host_list) {
6783 list_for_each_entry(dp, &sdhp->dev_info_list,
6784 dev_list) {
6785 set_bit(SDEBUG_UA_LUNS_CHANGED,
6786 dp->uas_bm);
6787 }
6788 }
6789 mutex_unlock(&sdebug_host_list_mutex);
6790 }
6791 return count;
6792 }
6793 return -EINVAL;
6794}
6795static DRIVER_ATTR_RW(max_luns);
6796
6797static ssize_t max_queue_show(struct device_driver *ddp, char *buf)
6798{
6799 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_max_queue);
6800}
6801/* N.B. max_queue can be changed while there are queued commands. In flight
6802 * commands beyond the new max_queue will be completed. */
6803static ssize_t max_queue_store(struct device_driver *ddp, const char *buf,
6804 size_t count)
6805{
6806 int n;
6807
6808 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n > 0) &&
6809 (n <= SDEBUG_CANQUEUE) &&
6810 (sdebug_host_max_queue == 0)) {
6811 mutex_lock(&sdebug_host_list_mutex);
6812
6813 /* We may only change sdebug_max_queue when we have no shosts */
6814 if (list_empty(&sdebug_host_list))
6815 sdebug_max_queue = n;
6816 else
6817 count = -EBUSY;
6818 mutex_unlock(&sdebug_host_list_mutex);
6819 return count;
6820 }
6821 return -EINVAL;
6822}
6823static DRIVER_ATTR_RW(max_queue);
6824
6825static ssize_t host_max_queue_show(struct device_driver *ddp, char *buf)
6826{
6827 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_host_max_queue);
6828}
6829
6830static ssize_t no_rwlock_show(struct device_driver *ddp, char *buf)
6831{
6832 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_no_rwlock);
6833}
6834
6835static ssize_t no_rwlock_store(struct device_driver *ddp, const char *buf, size_t count)
6836{
6837 bool v;
6838
6839 if (kstrtobool(buf, &v))
6840 return -EINVAL;
6841
6842 sdebug_no_rwlock = v;
6843 return count;
6844}
6845static DRIVER_ATTR_RW(no_rwlock);
6846
6847/*
6848 * Since this is used for .can_queue, and we get the hc_idx tag from the bitmap
6849 * in range [0, sdebug_host_max_queue), we can't change it.
6850 */
6851static DRIVER_ATTR_RO(host_max_queue);
6852
6853static ssize_t no_uld_show(struct device_driver *ddp, char *buf)
6854{
6855 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_no_uld);
6856}
6857static DRIVER_ATTR_RO(no_uld);
6858
6859static ssize_t scsi_level_show(struct device_driver *ddp, char *buf)
6860{
6861 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_scsi_level);
6862}
6863static DRIVER_ATTR_RO(scsi_level);
6864
6865static ssize_t virtual_gb_show(struct device_driver *ddp, char *buf)
6866{
6867 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_virtual_gb);
6868}
6869static ssize_t virtual_gb_store(struct device_driver *ddp, const char *buf,
6870 size_t count)
6871{
6872 int n;
6873 bool changed;
6874
6875 /* Ignore capacity change for ZBC drives for now */
6876 if (sdeb_zbc_in_use)
6877 return -ENOTSUPP;
6878
6879 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
6880 changed = (sdebug_virtual_gb != n);
6881 sdebug_virtual_gb = n;
6882 sdebug_capacity = get_sdebug_capacity();
6883 if (changed) {
6884 struct sdebug_host_info *sdhp;
6885 struct sdebug_dev_info *dp;
6886
6887 mutex_lock(&sdebug_host_list_mutex);
6888 list_for_each_entry(sdhp, &sdebug_host_list,
6889 host_list) {
6890 list_for_each_entry(dp, &sdhp->dev_info_list,
6891 dev_list) {
6892 set_bit(SDEBUG_UA_CAPACITY_CHANGED,
6893 dp->uas_bm);
6894 }
6895 }
6896 mutex_unlock(&sdebug_host_list_mutex);
6897 }
6898 return count;
6899 }
6900 return -EINVAL;
6901}
6902static DRIVER_ATTR_RW(virtual_gb);
6903
6904static ssize_t add_host_show(struct device_driver *ddp, char *buf)
6905{
6906 /* absolute number of hosts currently active is what is shown */
6907 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_num_hosts);
6908}
6909
6910static ssize_t add_host_store(struct device_driver *ddp, const char *buf,
6911 size_t count)
6912{
6913 bool found;
6914 unsigned long idx;
6915 struct sdeb_store_info *sip;
6916 bool want_phs = (sdebug_fake_rw == 0) && sdebug_per_host_store;
6917 int delta_hosts;
6918
6919 if (sscanf(buf, "%d", &delta_hosts) != 1)
6920 return -EINVAL;
6921 if (delta_hosts > 0) {
6922 do {
6923 found = false;
6924 if (want_phs) {
6925 xa_for_each_marked(per_store_ap, idx, sip,
6926 SDEB_XA_NOT_IN_USE) {
6927 sdeb_most_recent_idx = (int)idx;
6928 found = true;
6929 break;
6930 }
6931 if (found) /* re-use case */
6932 sdebug_add_host_helper((int)idx);
6933 else
6934 sdebug_do_add_host(true);
6935 } else {
6936 sdebug_do_add_host(false);
6937 }
6938 } while (--delta_hosts);
6939 } else if (delta_hosts < 0) {
6940 do {
6941 sdebug_do_remove_host(false);
6942 } while (++delta_hosts);
6943 }
6944 return count;
6945}
6946static DRIVER_ATTR_RW(add_host);
6947
6948static ssize_t vpd_use_hostno_show(struct device_driver *ddp, char *buf)
6949{
6950 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_vpd_use_hostno);
6951}
6952static ssize_t vpd_use_hostno_store(struct device_driver *ddp, const char *buf,
6953 size_t count)
6954{
6955 int n;
6956
6957 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
6958 sdebug_vpd_use_hostno = n;
6959 return count;
6960 }
6961 return -EINVAL;
6962}
6963static DRIVER_ATTR_RW(vpd_use_hostno);
6964
6965static ssize_t statistics_show(struct device_driver *ddp, char *buf)
6966{
6967 return scnprintf(buf, PAGE_SIZE, "%d\n", (int)sdebug_statistics);
6968}
6969static ssize_t statistics_store(struct device_driver *ddp, const char *buf,
6970 size_t count)
6971{
6972 int n;
6973
6974 if ((count > 0) && (sscanf(buf, "%d", &n) == 1) && (n >= 0)) {
6975 if (n > 0)
6976 sdebug_statistics = true;
6977 else {
6978 clear_queue_stats();
6979 sdebug_statistics = false;
6980 }
6981 return count;
6982 }
6983 return -EINVAL;
6984}
6985static DRIVER_ATTR_RW(statistics);
6986
6987static ssize_t sector_size_show(struct device_driver *ddp, char *buf)
6988{
6989 return scnprintf(buf, PAGE_SIZE, "%u\n", sdebug_sector_size);
6990}
6991static DRIVER_ATTR_RO(sector_size);
6992
6993static ssize_t submit_queues_show(struct device_driver *ddp, char *buf)
6994{
6995 return scnprintf(buf, PAGE_SIZE, "%d\n", submit_queues);
6996}
6997static DRIVER_ATTR_RO(submit_queues);
6998
6999static ssize_t dix_show(struct device_driver *ddp, char *buf)
7000{
7001 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_dix);
7002}
7003static DRIVER_ATTR_RO(dix);
7004
7005static ssize_t dif_show(struct device_driver *ddp, char *buf)
7006{
7007 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_dif);
7008}
7009static DRIVER_ATTR_RO(dif);
7010
7011static ssize_t guard_show(struct device_driver *ddp, char *buf)
7012{
7013 return scnprintf(buf, PAGE_SIZE, "%u\n", sdebug_guard);
7014}
7015static DRIVER_ATTR_RO(guard);
7016
7017static ssize_t ato_show(struct device_driver *ddp, char *buf)
7018{
7019 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_ato);
7020}
7021static DRIVER_ATTR_RO(ato);
7022
7023static ssize_t map_show(struct device_driver *ddp, char *buf)
7024{
7025 ssize_t count = 0;
7026
7027 if (!scsi_debug_lbp())
7028 return scnprintf(buf, PAGE_SIZE, "0-%u\n",
7029 sdebug_store_sectors);
7030
7031 if (sdebug_fake_rw == 0 && !xa_empty(per_store_ap)) {
7032 struct sdeb_store_info *sip = xa_load(per_store_ap, 0);
7033
7034 if (sip)
7035 count = scnprintf(buf, PAGE_SIZE - 1, "%*pbl",
7036 (int)map_size, sip->map_storep);
7037 }
7038 buf[count++] = '\n';
7039 buf[count] = '\0';
7040
7041 return count;
7042}
7043static DRIVER_ATTR_RO(map);
7044
7045static ssize_t random_show(struct device_driver *ddp, char *buf)
7046{
7047 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_random);
7048}
7049
7050static ssize_t random_store(struct device_driver *ddp, const char *buf,
7051 size_t count)
7052{
7053 bool v;
7054
7055 if (kstrtobool(buf, &v))
7056 return -EINVAL;
7057
7058 sdebug_random = v;
7059 return count;
7060}
7061static DRIVER_ATTR_RW(random);
7062
7063static ssize_t removable_show(struct device_driver *ddp, char *buf)
7064{
7065 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_removable ? 1 : 0);
7066}
7067static ssize_t removable_store(struct device_driver *ddp, const char *buf,
7068 size_t count)
7069{
7070 int n;
7071
7072 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
7073 sdebug_removable = (n > 0);
7074 return count;
7075 }
7076 return -EINVAL;
7077}
7078static DRIVER_ATTR_RW(removable);
7079
7080static ssize_t host_lock_show(struct device_driver *ddp, char *buf)
7081{
7082 return scnprintf(buf, PAGE_SIZE, "%d\n", !!sdebug_host_lock);
7083}
7084/* N.B. sdebug_host_lock does nothing, kept for backward compatibility */
7085static ssize_t host_lock_store(struct device_driver *ddp, const char *buf,
7086 size_t count)
7087{
7088 int n;
7089
7090 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
7091 sdebug_host_lock = (n > 0);
7092 return count;
7093 }
7094 return -EINVAL;
7095}
7096static DRIVER_ATTR_RW(host_lock);
7097
7098static ssize_t strict_show(struct device_driver *ddp, char *buf)
7099{
7100 return scnprintf(buf, PAGE_SIZE, "%d\n", !!sdebug_strict);
7101}
7102static ssize_t strict_store(struct device_driver *ddp, const char *buf,
7103 size_t count)
7104{
7105 int n;
7106
7107 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
7108 sdebug_strict = (n > 0);
7109 return count;
7110 }
7111 return -EINVAL;
7112}
7113static DRIVER_ATTR_RW(strict);
7114
7115static ssize_t uuid_ctl_show(struct device_driver *ddp, char *buf)
7116{
7117 return scnprintf(buf, PAGE_SIZE, "%d\n", !!sdebug_uuid_ctl);
7118}
7119static DRIVER_ATTR_RO(uuid_ctl);
7120
7121static ssize_t cdb_len_show(struct device_driver *ddp, char *buf)
7122{
7123 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_cdb_len);
7124}
7125static ssize_t cdb_len_store(struct device_driver *ddp, const char *buf,
7126 size_t count)
7127{
7128 int ret, n;
7129
7130 ret = kstrtoint(buf, 0, &n);
7131 if (ret)
7132 return ret;
7133 sdebug_cdb_len = n;
7134 all_config_cdb_len();
7135 return count;
7136}
7137static DRIVER_ATTR_RW(cdb_len);
7138
7139static const char * const zbc_model_strs_a[] = {
7140 [BLK_ZONED_NONE] = "none",
7141 [BLK_ZONED_HA] = "host-aware",
7142 [BLK_ZONED_HM] = "host-managed",
7143};
7144
7145static const char * const zbc_model_strs_b[] = {
7146 [BLK_ZONED_NONE] = "no",
7147 [BLK_ZONED_HA] = "aware",
7148 [BLK_ZONED_HM] = "managed",
7149};
7150
7151static const char * const zbc_model_strs_c[] = {
7152 [BLK_ZONED_NONE] = "0",
7153 [BLK_ZONED_HA] = "1",
7154 [BLK_ZONED_HM] = "2",
7155};
7156
7157static int sdeb_zbc_model_str(const char *cp)
7158{
7159 int res = sysfs_match_string(zbc_model_strs_a, cp);
7160
7161 if (res < 0) {
7162 res = sysfs_match_string(zbc_model_strs_b, cp);
7163 if (res < 0) {
7164 res = sysfs_match_string(zbc_model_strs_c, cp);
7165 if (res < 0)
7166 return -EINVAL;
7167 }
7168 }
7169 return res;
7170}
7171
7172static ssize_t zbc_show(struct device_driver *ddp, char *buf)
7173{
7174 return scnprintf(buf, PAGE_SIZE, "%s\n",
7175 zbc_model_strs_a[sdeb_zbc_model]);
7176}
7177static DRIVER_ATTR_RO(zbc);
7178
7179static ssize_t tur_ms_to_ready_show(struct device_driver *ddp, char *buf)
7180{
7181 return scnprintf(buf, PAGE_SIZE, "%d\n", sdeb_tur_ms_to_ready);
7182}
7183static DRIVER_ATTR_RO(tur_ms_to_ready);
7184
7185/* Note: The following array creates attribute files in the
7186 /sys/bus/pseudo/drivers/scsi_debug directory. The advantage of these
7187 files (over those found in the /sys/module/scsi_debug/parameters
7188 directory) is that auxiliary actions can be triggered when an attribute
7189 is changed. For example see: add_host_store() above.
7190 */
7191
7192static struct attribute *sdebug_drv_attrs[] = {
7193 &driver_attr_delay.attr,
7194 &driver_attr_opts.attr,
7195 &driver_attr_ptype.attr,
7196 &driver_attr_dsense.attr,
7197 &driver_attr_fake_rw.attr,
7198 &driver_attr_host_max_queue.attr,
7199 &driver_attr_no_lun_0.attr,
7200 &driver_attr_num_tgts.attr,
7201 &driver_attr_dev_size_mb.attr,
7202 &driver_attr_num_parts.attr,
7203 &driver_attr_every_nth.attr,
7204 &driver_attr_lun_format.attr,
7205 &driver_attr_max_luns.attr,
7206 &driver_attr_max_queue.attr,
7207 &driver_attr_no_rwlock.attr,
7208 &driver_attr_no_uld.attr,
7209 &driver_attr_scsi_level.attr,
7210 &driver_attr_virtual_gb.attr,
7211 &driver_attr_add_host.attr,
7212 &driver_attr_per_host_store.attr,
7213 &driver_attr_vpd_use_hostno.attr,
7214 &driver_attr_sector_size.attr,
7215 &driver_attr_statistics.attr,
7216 &driver_attr_submit_queues.attr,
7217 &driver_attr_dix.attr,
7218 &driver_attr_dif.attr,
7219 &driver_attr_guard.attr,
7220 &driver_attr_ato.attr,
7221 &driver_attr_map.attr,
7222 &driver_attr_random.attr,
7223 &driver_attr_removable.attr,
7224 &driver_attr_host_lock.attr,
7225 &driver_attr_ndelay.attr,
7226 &driver_attr_strict.attr,
7227 &driver_attr_uuid_ctl.attr,
7228 &driver_attr_cdb_len.attr,
7229 &driver_attr_tur_ms_to_ready.attr,
7230 &driver_attr_zbc.attr,
7231 NULL,
7232};
7233ATTRIBUTE_GROUPS(sdebug_drv);
7234
7235static struct device *pseudo_primary;
7236
7237static int __init scsi_debug_init(void)
7238{
7239 bool want_store = (sdebug_fake_rw == 0);
7240 unsigned long sz;
7241 int k, ret, hosts_to_add;
7242 int idx = -1;
7243
7244 if (sdebug_ndelay >= 1000 * 1000 * 1000) {
7245 pr_warn("ndelay must be less than 1 second, ignored\n");
7246 sdebug_ndelay = 0;
7247 } else if (sdebug_ndelay > 0)
7248 sdebug_jdelay = JDELAY_OVERRIDDEN;
7249
7250 switch (sdebug_sector_size) {
7251 case 512:
7252 case 1024:
7253 case 2048:
7254 case 4096:
7255 break;
7256 default:
7257 pr_err("invalid sector_size %d\n", sdebug_sector_size);
7258 return -EINVAL;
7259 }
7260
7261 switch (sdebug_dif) {
7262 case T10_PI_TYPE0_PROTECTION:
7263 break;
7264 case T10_PI_TYPE1_PROTECTION:
7265 case T10_PI_TYPE2_PROTECTION:
7266 case T10_PI_TYPE3_PROTECTION:
7267 have_dif_prot = true;
7268 break;
7269
7270 default:
7271 pr_err("dif must be 0, 1, 2 or 3\n");
7272 return -EINVAL;
7273 }
7274
7275 if (sdebug_num_tgts < 0) {
7276 pr_err("num_tgts must be >= 0\n");
7277 return -EINVAL;
7278 }
7279
7280 if (sdebug_guard > 1) {
7281 pr_err("guard must be 0 or 1\n");
7282 return -EINVAL;
7283 }
7284
7285 if (sdebug_ato > 1) {
7286 pr_err("ato must be 0 or 1\n");
7287 return -EINVAL;
7288 }
7289
7290 if (sdebug_physblk_exp > 15) {
7291 pr_err("invalid physblk_exp %u\n", sdebug_physblk_exp);
7292 return -EINVAL;
7293 }
7294
7295 sdebug_lun_am = sdebug_lun_am_i;
7296 if (sdebug_lun_am > SAM_LUN_AM_FLAT) {
7297 pr_warn("Invalid LUN format %u, using default\n", (int)sdebug_lun_am);
7298 sdebug_lun_am = SAM_LUN_AM_PERIPHERAL;
7299 }
7300
7301 if (sdebug_max_luns > 256) {
7302 if (sdebug_max_luns > 16384) {
7303 pr_warn("max_luns can be no more than 16384, use default\n");
7304 sdebug_max_luns = DEF_MAX_LUNS;
7305 }
7306 sdebug_lun_am = SAM_LUN_AM_FLAT;
7307 }
7308
7309 if (sdebug_lowest_aligned > 0x3fff) {
7310 pr_err("lowest_aligned too big: %u\n", sdebug_lowest_aligned);
7311 return -EINVAL;
7312 }
7313
7314 if (submit_queues < 1) {
7315 pr_err("submit_queues must be 1 or more\n");
7316 return -EINVAL;
7317 }
7318
7319 if ((sdebug_max_queue > SDEBUG_CANQUEUE) || (sdebug_max_queue < 1)) {
7320 pr_err("max_queue must be in range [1, %d]\n", SDEBUG_CANQUEUE);
7321 return -EINVAL;
7322 }
7323
7324 if ((sdebug_host_max_queue > SDEBUG_CANQUEUE) ||
7325 (sdebug_host_max_queue < 0)) {
7326 pr_err("host_max_queue must be in range [0 %d]\n",
7327 SDEBUG_CANQUEUE);
7328 return -EINVAL;
7329 }
7330
7331 if (sdebug_host_max_queue &&
7332 (sdebug_max_queue != sdebug_host_max_queue)) {
7333 sdebug_max_queue = sdebug_host_max_queue;
7334 pr_warn("fixing max submit queue depth to host max queue depth, %d\n",
7335 sdebug_max_queue);
7336 }
7337
7338 /*
7339 * check for host managed zoned block device specified with
7340 * ptype=0x14 or zbc=XXX.
7341 */
7342 if (sdebug_ptype == TYPE_ZBC) {
7343 sdeb_zbc_model = BLK_ZONED_HM;
7344 } else if (sdeb_zbc_model_s && *sdeb_zbc_model_s) {
7345 k = sdeb_zbc_model_str(sdeb_zbc_model_s);
7346 if (k < 0)
7347 return k;
7348 sdeb_zbc_model = k;
7349 switch (sdeb_zbc_model) {
7350 case BLK_ZONED_NONE:
7351 case BLK_ZONED_HA:
7352 sdebug_ptype = TYPE_DISK;
7353 break;
7354 case BLK_ZONED_HM:
7355 sdebug_ptype = TYPE_ZBC;
7356 break;
7357 default:
7358 pr_err("Invalid ZBC model\n");
7359 return -EINVAL;
7360 }
7361 }
7362 if (sdeb_zbc_model != BLK_ZONED_NONE) {
7363 sdeb_zbc_in_use = true;
7364 if (sdebug_dev_size_mb == DEF_DEV_SIZE_PRE_INIT)
7365 sdebug_dev_size_mb = DEF_ZBC_DEV_SIZE_MB;
7366 }
7367
7368 if (sdebug_dev_size_mb == DEF_DEV_SIZE_PRE_INIT)
7369 sdebug_dev_size_mb = DEF_DEV_SIZE_MB;
7370 if (sdebug_dev_size_mb < 1)
7371 sdebug_dev_size_mb = 1; /* force minimum 1 MB ramdisk */
7372 sz = (unsigned long)sdebug_dev_size_mb * 1048576;
7373 sdebug_store_sectors = sz / sdebug_sector_size;
7374 sdebug_capacity = get_sdebug_capacity();
7375
7376 /* play around with geometry, don't waste too much on track 0 */
7377 sdebug_heads = 8;
7378 sdebug_sectors_per = 32;
7379 if (sdebug_dev_size_mb >= 256)
7380 sdebug_heads = 64;
7381 else if (sdebug_dev_size_mb >= 16)
7382 sdebug_heads = 32;
7383 sdebug_cylinders_per = (unsigned long)sdebug_capacity /
7384 (sdebug_sectors_per * sdebug_heads);
7385 if (sdebug_cylinders_per >= 1024) {
7386 /* other LLDs do this; implies >= 1GB ram disk ... */
7387 sdebug_heads = 255;
7388 sdebug_sectors_per = 63;
7389 sdebug_cylinders_per = (unsigned long)sdebug_capacity /
7390 (sdebug_sectors_per * sdebug_heads);
7391 }
7392 if (scsi_debug_lbp()) {
7393 sdebug_unmap_max_blocks =
7394 clamp(sdebug_unmap_max_blocks, 0U, 0xffffffffU);
7395
7396 sdebug_unmap_max_desc =
7397 clamp(sdebug_unmap_max_desc, 0U, 256U);
7398
7399 sdebug_unmap_granularity =
7400 clamp(sdebug_unmap_granularity, 1U, 0xffffffffU);
7401
7402 if (sdebug_unmap_alignment &&
7403 sdebug_unmap_granularity <=
7404 sdebug_unmap_alignment) {
7405 pr_err("ERR: unmap_granularity <= unmap_alignment\n");
7406 return -EINVAL;
7407 }
7408 }
7409 xa_init_flags(per_store_ap, XA_FLAGS_ALLOC | XA_FLAGS_LOCK_IRQ);
7410 if (want_store) {
7411 idx = sdebug_add_store();
7412 if (idx < 0)
7413 return idx;
7414 }
7415
7416 pseudo_primary = root_device_register("pseudo_0");
7417 if (IS_ERR(pseudo_primary)) {
7418 pr_warn("root_device_register() error\n");
7419 ret = PTR_ERR(pseudo_primary);
7420 goto free_vm;
7421 }
7422 ret = bus_register(&pseudo_lld_bus);
7423 if (ret < 0) {
7424 pr_warn("bus_register error: %d\n", ret);
7425 goto dev_unreg;
7426 }
7427 ret = driver_register(&sdebug_driverfs_driver);
7428 if (ret < 0) {
7429 pr_warn("driver_register error: %d\n", ret);
7430 goto bus_unreg;
7431 }
7432
7433 hosts_to_add = sdebug_add_host;
7434 sdebug_add_host = 0;
7435
7436 queued_cmd_cache = KMEM_CACHE(sdebug_queued_cmd, SLAB_HWCACHE_ALIGN);
7437 if (!queued_cmd_cache) {
7438 ret = -ENOMEM;
7439 goto driver_unreg;
7440 }
7441
7442 sdebug_debugfs_root = debugfs_create_dir("scsi_debug", NULL);
7443 if (IS_ERR_OR_NULL(sdebug_debugfs_root))
7444 pr_info("%s: failed to create initial debugfs directory\n", __func__);
7445
7446 for (k = 0; k < hosts_to_add; k++) {
7447 if (want_store && k == 0) {
7448 ret = sdebug_add_host_helper(idx);
7449 if (ret < 0) {
7450 pr_err("add_host_helper k=%d, error=%d\n",
7451 k, -ret);
7452 break;
7453 }
7454 } else {
7455 ret = sdebug_do_add_host(want_store &&
7456 sdebug_per_host_store);
7457 if (ret < 0) {
7458 pr_err("add_host k=%d error=%d\n", k, -ret);
7459 break;
7460 }
7461 }
7462 }
7463 if (sdebug_verbose)
7464 pr_info("built %d host(s)\n", sdebug_num_hosts);
7465
7466 return 0;
7467
7468driver_unreg:
7469 driver_unregister(&sdebug_driverfs_driver);
7470bus_unreg:
7471 bus_unregister(&pseudo_lld_bus);
7472dev_unreg:
7473 root_device_unregister(pseudo_primary);
7474free_vm:
7475 sdebug_erase_store(idx, NULL);
7476 return ret;
7477}
7478
7479static void __exit scsi_debug_exit(void)
7480{
7481 int k = sdebug_num_hosts;
7482
7483 for (; k; k--)
7484 sdebug_do_remove_host(true);
7485 kmem_cache_destroy(queued_cmd_cache);
7486 driver_unregister(&sdebug_driverfs_driver);
7487 bus_unregister(&pseudo_lld_bus);
7488 root_device_unregister(pseudo_primary);
7489
7490 sdebug_erase_all_stores(false);
7491 xa_destroy(per_store_ap);
7492 debugfs_remove(sdebug_debugfs_root);
7493}
7494
7495device_initcall(scsi_debug_init);
7496module_exit(scsi_debug_exit);
7497
7498static void sdebug_release_adapter(struct device *dev)
7499{
7500 struct sdebug_host_info *sdbg_host;
7501
7502 sdbg_host = dev_to_sdebug_host(dev);
7503 kfree(sdbg_host);
7504}
7505
7506/* idx must be valid, if sip is NULL then it will be obtained using idx */
7507static void sdebug_erase_store(int idx, struct sdeb_store_info *sip)
7508{
7509 if (idx < 0)
7510 return;
7511 if (!sip) {
7512 if (xa_empty(per_store_ap))
7513 return;
7514 sip = xa_load(per_store_ap, idx);
7515 if (!sip)
7516 return;
7517 }
7518 vfree(sip->map_storep);
7519 vfree(sip->dif_storep);
7520 vfree(sip->storep);
7521 xa_erase(per_store_ap, idx);
7522 kfree(sip);
7523}
7524
7525/* Assume apart_from_first==false only in shutdown case. */
7526static void sdebug_erase_all_stores(bool apart_from_first)
7527{
7528 unsigned long idx;
7529 struct sdeb_store_info *sip = NULL;
7530
7531 xa_for_each(per_store_ap, idx, sip) {
7532 if (apart_from_first)
7533 apart_from_first = false;
7534 else
7535 sdebug_erase_store(idx, sip);
7536 }
7537 if (apart_from_first)
7538 sdeb_most_recent_idx = sdeb_first_idx;
7539}
7540
7541/*
7542 * Returns store xarray new element index (idx) if >=0 else negated errno.
7543 * Limit the number of stores to 65536.
7544 */
7545static int sdebug_add_store(void)
7546{
7547 int res;
7548 u32 n_idx;
7549 unsigned long iflags;
7550 unsigned long sz = (unsigned long)sdebug_dev_size_mb * 1048576;
7551 struct sdeb_store_info *sip = NULL;
7552 struct xa_limit xal = { .max = 1 << 16, .min = 0 };
7553
7554 sip = kzalloc(sizeof(*sip), GFP_KERNEL);
7555 if (!sip)
7556 return -ENOMEM;
7557
7558 xa_lock_irqsave(per_store_ap, iflags);
7559 res = __xa_alloc(per_store_ap, &n_idx, sip, xal, GFP_ATOMIC);
7560 if (unlikely(res < 0)) {
7561 xa_unlock_irqrestore(per_store_ap, iflags);
7562 kfree(sip);
7563 pr_warn("%s: xa_alloc() errno=%d\n", __func__, -res);
7564 return res;
7565 }
7566 sdeb_most_recent_idx = n_idx;
7567 if (sdeb_first_idx < 0)
7568 sdeb_first_idx = n_idx;
7569 xa_unlock_irqrestore(per_store_ap, iflags);
7570
7571 res = -ENOMEM;
7572 sip->storep = vzalloc(sz);
7573 if (!sip->storep) {
7574 pr_err("user data oom\n");
7575 goto err;
7576 }
7577 if (sdebug_num_parts > 0)
7578 sdebug_build_parts(sip->storep, sz);
7579
7580 /* DIF/DIX: what T10 calls Protection Information (PI) */
7581 if (sdebug_dix) {
7582 int dif_size;
7583
7584 dif_size = sdebug_store_sectors * sizeof(struct t10_pi_tuple);
7585 sip->dif_storep = vmalloc(dif_size);
7586
7587 pr_info("dif_storep %u bytes @ %pK\n", dif_size,
7588 sip->dif_storep);
7589
7590 if (!sip->dif_storep) {
7591 pr_err("DIX oom\n");
7592 goto err;
7593 }
7594 memset(sip->dif_storep, 0xff, dif_size);
7595 }
7596 /* Logical Block Provisioning */
7597 if (scsi_debug_lbp()) {
7598 map_size = lba_to_map_index(sdebug_store_sectors - 1) + 1;
7599 sip->map_storep = vmalloc(array_size(sizeof(long),
7600 BITS_TO_LONGS(map_size)));
7601
7602 pr_info("%lu provisioning blocks\n", map_size);
7603
7604 if (!sip->map_storep) {
7605 pr_err("LBP map oom\n");
7606 goto err;
7607 }
7608
7609 bitmap_zero(sip->map_storep, map_size);
7610
7611 /* Map first 1KB for partition table */
7612 if (sdebug_num_parts)
7613 map_region(sip, 0, 2);
7614 }
7615
7616 rwlock_init(&sip->macc_lck);
7617 return (int)n_idx;
7618err:
7619 sdebug_erase_store((int)n_idx, sip);
7620 pr_warn("%s: failed, errno=%d\n", __func__, -res);
7621 return res;
7622}
7623
7624static int sdebug_add_host_helper(int per_host_idx)
7625{
7626 int k, devs_per_host, idx;
7627 int error = -ENOMEM;
7628 struct sdebug_host_info *sdbg_host;
7629 struct sdebug_dev_info *sdbg_devinfo, *tmp;
7630
7631 sdbg_host = kzalloc(sizeof(*sdbg_host), GFP_KERNEL);
7632 if (!sdbg_host)
7633 return -ENOMEM;
7634 idx = (per_host_idx < 0) ? sdeb_first_idx : per_host_idx;
7635 if (xa_get_mark(per_store_ap, idx, SDEB_XA_NOT_IN_USE))
7636 xa_clear_mark(per_store_ap, idx, SDEB_XA_NOT_IN_USE);
7637 sdbg_host->si_idx = idx;
7638
7639 INIT_LIST_HEAD(&sdbg_host->dev_info_list);
7640
7641 devs_per_host = sdebug_num_tgts * sdebug_max_luns;
7642 for (k = 0; k < devs_per_host; k++) {
7643 sdbg_devinfo = sdebug_device_create(sdbg_host, GFP_KERNEL);
7644 if (!sdbg_devinfo)
7645 goto clean;
7646 }
7647
7648 mutex_lock(&sdebug_host_list_mutex);
7649 list_add_tail(&sdbg_host->host_list, &sdebug_host_list);
7650 mutex_unlock(&sdebug_host_list_mutex);
7651
7652 sdbg_host->dev.bus = &pseudo_lld_bus;
7653 sdbg_host->dev.parent = pseudo_primary;
7654 sdbg_host->dev.release = &sdebug_release_adapter;
7655 dev_set_name(&sdbg_host->dev, "adapter%d", sdebug_num_hosts);
7656
7657 error = device_register(&sdbg_host->dev);
7658 if (error) {
7659 mutex_lock(&sdebug_host_list_mutex);
7660 list_del(&sdbg_host->host_list);
7661 mutex_unlock(&sdebug_host_list_mutex);
7662 goto clean;
7663 }
7664
7665 ++sdebug_num_hosts;
7666 return 0;
7667
7668clean:
7669 list_for_each_entry_safe(sdbg_devinfo, tmp, &sdbg_host->dev_info_list,
7670 dev_list) {
7671 list_del(&sdbg_devinfo->dev_list);
7672 kfree(sdbg_devinfo->zstate);
7673 kfree(sdbg_devinfo);
7674 }
7675 if (sdbg_host->dev.release)
7676 put_device(&sdbg_host->dev);
7677 else
7678 kfree(sdbg_host);
7679 pr_warn("%s: failed, errno=%d\n", __func__, -error);
7680 return error;
7681}
7682
7683static int sdebug_do_add_host(bool mk_new_store)
7684{
7685 int ph_idx = sdeb_most_recent_idx;
7686
7687 if (mk_new_store) {
7688 ph_idx = sdebug_add_store();
7689 if (ph_idx < 0)
7690 return ph_idx;
7691 }
7692 return sdebug_add_host_helper(ph_idx);
7693}
7694
7695static void sdebug_do_remove_host(bool the_end)
7696{
7697 int idx = -1;
7698 struct sdebug_host_info *sdbg_host = NULL;
7699 struct sdebug_host_info *sdbg_host2;
7700
7701 mutex_lock(&sdebug_host_list_mutex);
7702 if (!list_empty(&sdebug_host_list)) {
7703 sdbg_host = list_entry(sdebug_host_list.prev,
7704 struct sdebug_host_info, host_list);
7705 idx = sdbg_host->si_idx;
7706 }
7707 if (!the_end && idx >= 0) {
7708 bool unique = true;
7709
7710 list_for_each_entry(sdbg_host2, &sdebug_host_list, host_list) {
7711 if (sdbg_host2 == sdbg_host)
7712 continue;
7713 if (idx == sdbg_host2->si_idx) {
7714 unique = false;
7715 break;
7716 }
7717 }
7718 if (unique) {
7719 xa_set_mark(per_store_ap, idx, SDEB_XA_NOT_IN_USE);
7720 if (idx == sdeb_most_recent_idx)
7721 --sdeb_most_recent_idx;
7722 }
7723 }
7724 if (sdbg_host)
7725 list_del(&sdbg_host->host_list);
7726 mutex_unlock(&sdebug_host_list_mutex);
7727
7728 if (!sdbg_host)
7729 return;
7730
7731 device_unregister(&sdbg_host->dev);
7732 --sdebug_num_hosts;
7733}
7734
7735static int sdebug_change_qdepth(struct scsi_device *sdev, int qdepth)
7736{
7737 struct sdebug_dev_info *devip = sdev->hostdata;
7738
7739 if (!devip)
7740 return -ENODEV;
7741
7742 mutex_lock(&sdebug_host_list_mutex);
7743 block_unblock_all_queues(true);
7744
7745 if (qdepth > SDEBUG_CANQUEUE) {
7746 qdepth = SDEBUG_CANQUEUE;
7747 pr_warn("%s: requested qdepth [%d] exceeds canqueue [%d], trim\n", __func__,
7748 qdepth, SDEBUG_CANQUEUE);
7749 }
7750 if (qdepth < 1)
7751 qdepth = 1;
7752 if (qdepth != sdev->queue_depth)
7753 scsi_change_queue_depth(sdev, qdepth);
7754
7755 block_unblock_all_queues(false);
7756 mutex_unlock(&sdebug_host_list_mutex);
7757
7758 if (SDEBUG_OPT_Q_NOISE & sdebug_opts)
7759 sdev_printk(KERN_INFO, sdev, "%s: qdepth=%d\n", __func__, qdepth);
7760
7761 return sdev->queue_depth;
7762}
7763
7764static bool fake_timeout(struct scsi_cmnd *scp)
7765{
7766 if (0 == (atomic_read(&sdebug_cmnd_count) % abs(sdebug_every_nth))) {
7767 if (sdebug_every_nth < -1)
7768 sdebug_every_nth = -1;
7769 if (SDEBUG_OPT_TIMEOUT & sdebug_opts)
7770 return true; /* ignore command causing timeout */
7771 else if (SDEBUG_OPT_MAC_TIMEOUT & sdebug_opts &&
7772 scsi_medium_access_command(scp))
7773 return true; /* time out reads and writes */
7774 }
7775 return false;
7776}
7777
7778/* Response to TUR or media access command when device stopped */
7779static int resp_not_ready(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
7780{
7781 int stopped_state;
7782 u64 diff_ns = 0;
7783 ktime_t now_ts = ktime_get_boottime();
7784 struct scsi_device *sdp = scp->device;
7785
7786 stopped_state = atomic_read(&devip->stopped);
7787 if (stopped_state == 2) {
7788 if (ktime_to_ns(now_ts) > ktime_to_ns(devip->create_ts)) {
7789 diff_ns = ktime_to_ns(ktime_sub(now_ts, devip->create_ts));
7790 if (diff_ns >= ((u64)sdeb_tur_ms_to_ready * 1000000)) {
7791 /* tur_ms_to_ready timer extinguished */
7792 atomic_set(&devip->stopped, 0);
7793 return 0;
7794 }
7795 }
7796 mk_sense_buffer(scp, NOT_READY, LOGICAL_UNIT_NOT_READY, 0x1);
7797 if (sdebug_verbose)
7798 sdev_printk(KERN_INFO, sdp,
7799 "%s: Not ready: in process of becoming ready\n", my_name);
7800 if (scp->cmnd[0] == TEST_UNIT_READY) {
7801 u64 tur_nanosecs_to_ready = (u64)sdeb_tur_ms_to_ready * 1000000;
7802
7803 if (diff_ns <= tur_nanosecs_to_ready)
7804 diff_ns = tur_nanosecs_to_ready - diff_ns;
7805 else
7806 diff_ns = tur_nanosecs_to_ready;
7807 /* As per 20-061r2 approved for spc6 by T10 on 20200716 */
7808 do_div(diff_ns, 1000000); /* diff_ns becomes milliseconds */
7809 scsi_set_sense_information(scp->sense_buffer, SCSI_SENSE_BUFFERSIZE,
7810 diff_ns);
7811 return check_condition_result;
7812 }
7813 }
7814 mk_sense_buffer(scp, NOT_READY, LOGICAL_UNIT_NOT_READY, 0x2);
7815 if (sdebug_verbose)
7816 sdev_printk(KERN_INFO, sdp, "%s: Not ready: initializing command required\n",
7817 my_name);
7818 return check_condition_result;
7819}
7820
7821static void sdebug_map_queues(struct Scsi_Host *shost)
7822{
7823 int i, qoff;
7824
7825 if (shost->nr_hw_queues == 1)
7826 return;
7827
7828 for (i = 0, qoff = 0; i < HCTX_MAX_TYPES; i++) {
7829 struct blk_mq_queue_map *map = &shost->tag_set.map[i];
7830
7831 map->nr_queues = 0;
7832
7833 if (i == HCTX_TYPE_DEFAULT)
7834 map->nr_queues = submit_queues - poll_queues;
7835 else if (i == HCTX_TYPE_POLL)
7836 map->nr_queues = poll_queues;
7837
7838 if (!map->nr_queues) {
7839 BUG_ON(i == HCTX_TYPE_DEFAULT);
7840 continue;
7841 }
7842
7843 map->queue_offset = qoff;
7844 blk_mq_map_queues(map);
7845
7846 qoff += map->nr_queues;
7847 }
7848}
7849
7850struct sdebug_blk_mq_poll_data {
7851 unsigned int queue_num;
7852 int *num_entries;
7853};
7854
7855/*
7856 * We don't handle aborted commands here, but it does not seem possible to have
7857 * aborted polled commands from schedule_resp()
7858 */
7859static bool sdebug_blk_mq_poll_iter(struct request *rq, void *opaque)
7860{
7861 struct sdebug_blk_mq_poll_data *data = opaque;
7862 struct scsi_cmnd *cmd = blk_mq_rq_to_pdu(rq);
7863 struct sdebug_scsi_cmd *sdsc = scsi_cmd_priv(cmd);
7864 struct sdebug_defer *sd_dp;
7865 u32 unique_tag = blk_mq_unique_tag(rq);
7866 u16 hwq = blk_mq_unique_tag_to_hwq(unique_tag);
7867 struct sdebug_queued_cmd *sqcp;
7868 unsigned long flags;
7869 int queue_num = data->queue_num;
7870 ktime_t time;
7871
7872 /* We're only interested in one queue for this iteration */
7873 if (hwq != queue_num)
7874 return true;
7875
7876 /* Subsequent checks would fail if this failed, but check anyway */
7877 if (!test_bit(SCMD_STATE_INFLIGHT, &cmd->state))
7878 return true;
7879
7880 time = ktime_get_boottime();
7881
7882 spin_lock_irqsave(&sdsc->lock, flags);
7883 sqcp = TO_QUEUED_CMD(cmd);
7884 if (!sqcp) {
7885 spin_unlock_irqrestore(&sdsc->lock, flags);
7886 return true;
7887 }
7888
7889 sd_dp = &sqcp->sd_dp;
7890 if (READ_ONCE(sd_dp->defer_t) != SDEB_DEFER_POLL) {
7891 spin_unlock_irqrestore(&sdsc->lock, flags);
7892 return true;
7893 }
7894
7895 if (time < sd_dp->cmpl_ts) {
7896 spin_unlock_irqrestore(&sdsc->lock, flags);
7897 return true;
7898 }
7899
7900 ASSIGN_QUEUED_CMD(cmd, NULL);
7901 spin_unlock_irqrestore(&sdsc->lock, flags);
7902
7903 if (sdebug_statistics) {
7904 atomic_inc(&sdebug_completions);
7905 if (raw_smp_processor_id() != sd_dp->issuing_cpu)
7906 atomic_inc(&sdebug_miss_cpus);
7907 }
7908
7909 sdebug_free_queued_cmd(sqcp);
7910
7911 scsi_done(cmd); /* callback to mid level */
7912 (*data->num_entries)++;
7913 return true;
7914}
7915
7916static int sdebug_blk_mq_poll(struct Scsi_Host *shost, unsigned int queue_num)
7917{
7918 int num_entries = 0;
7919 struct sdebug_blk_mq_poll_data data = {
7920 .queue_num = queue_num,
7921 .num_entries = &num_entries,
7922 };
7923
7924 blk_mq_tagset_busy_iter(&shost->tag_set, sdebug_blk_mq_poll_iter,
7925 &data);
7926
7927 if (num_entries > 0)
7928 atomic_add(num_entries, &sdeb_mq_poll_count);
7929 return num_entries;
7930}
7931
7932static int sdebug_timeout_cmd(struct scsi_cmnd *cmnd)
7933{
7934 struct scsi_device *sdp = cmnd->device;
7935 struct sdebug_dev_info *devip = (struct sdebug_dev_info *)sdp->hostdata;
7936 struct sdebug_err_inject *err;
7937 unsigned char *cmd = cmnd->cmnd;
7938 int ret = 0;
7939
7940 if (devip == NULL)
7941 return 0;
7942
7943 rcu_read_lock();
7944 list_for_each_entry_rcu(err, &devip->inject_err_list, list) {
7945 if (err->type == ERR_TMOUT_CMD &&
7946 (err->cmd == cmd[0] || err->cmd == 0xff)) {
7947 ret = !!err->cnt;
7948 if (err->cnt < 0)
7949 err->cnt++;
7950
7951 rcu_read_unlock();
7952 return ret;
7953 }
7954 }
7955 rcu_read_unlock();
7956
7957 return 0;
7958}
7959
7960static int sdebug_fail_queue_cmd(struct scsi_cmnd *cmnd)
7961{
7962 struct scsi_device *sdp = cmnd->device;
7963 struct sdebug_dev_info *devip = (struct sdebug_dev_info *)sdp->hostdata;
7964 struct sdebug_err_inject *err;
7965 unsigned char *cmd = cmnd->cmnd;
7966 int ret = 0;
7967
7968 if (devip == NULL)
7969 return 0;
7970
7971 rcu_read_lock();
7972 list_for_each_entry_rcu(err, &devip->inject_err_list, list) {
7973 if (err->type == ERR_FAIL_QUEUE_CMD &&
7974 (err->cmd == cmd[0] || err->cmd == 0xff)) {
7975 ret = err->cnt ? err->queuecmd_ret : 0;
7976 if (err->cnt < 0)
7977 err->cnt++;
7978
7979 rcu_read_unlock();
7980 return ret;
7981 }
7982 }
7983 rcu_read_unlock();
7984
7985 return 0;
7986}
7987
7988static int sdebug_fail_cmd(struct scsi_cmnd *cmnd, int *retval,
7989 struct sdebug_err_inject *info)
7990{
7991 struct scsi_device *sdp = cmnd->device;
7992 struct sdebug_dev_info *devip = (struct sdebug_dev_info *)sdp->hostdata;
7993 struct sdebug_err_inject *err;
7994 unsigned char *cmd = cmnd->cmnd;
7995 int ret = 0;
7996 int result;
7997
7998 if (devip == NULL)
7999 return 0;
8000
8001 rcu_read_lock();
8002 list_for_each_entry_rcu(err, &devip->inject_err_list, list) {
8003 if (err->type == ERR_FAIL_CMD &&
8004 (err->cmd == cmd[0] || err->cmd == 0xff)) {
8005 if (!err->cnt) {
8006 rcu_read_unlock();
8007 return 0;
8008 }
8009
8010 ret = !!err->cnt;
8011 rcu_read_unlock();
8012 goto out_handle;
8013 }
8014 }
8015 rcu_read_unlock();
8016
8017 return 0;
8018
8019out_handle:
8020 if (err->cnt < 0)
8021 err->cnt++;
8022 mk_sense_buffer(cmnd, err->sense_key, err->asc, err->asq);
8023 result = err->status_byte | err->host_byte << 16 | err->driver_byte << 24;
8024 *info = *err;
8025 *retval = schedule_resp(cmnd, devip, result, NULL, 0, 0);
8026
8027 return ret;
8028}
8029
8030static int scsi_debug_queuecommand(struct Scsi_Host *shost,
8031 struct scsi_cmnd *scp)
8032{
8033 u8 sdeb_i;
8034 struct scsi_device *sdp = scp->device;
8035 const struct opcode_info_t *oip;
8036 const struct opcode_info_t *r_oip;
8037 struct sdebug_dev_info *devip;
8038 u8 *cmd = scp->cmnd;
8039 int (*r_pfp)(struct scsi_cmnd *, struct sdebug_dev_info *);
8040 int (*pfp)(struct scsi_cmnd *, struct sdebug_dev_info *) = NULL;
8041 int k, na;
8042 int errsts = 0;
8043 u64 lun_index = sdp->lun & 0x3FFF;
8044 u32 flags;
8045 u16 sa;
8046 u8 opcode = cmd[0];
8047 bool has_wlun_rl;
8048 bool inject_now;
8049 int ret = 0;
8050 struct sdebug_err_inject err;
8051
8052 scsi_set_resid(scp, 0);
8053 if (sdebug_statistics) {
8054 atomic_inc(&sdebug_cmnd_count);
8055 inject_now = inject_on_this_cmd();
8056 } else {
8057 inject_now = false;
8058 }
8059 if (unlikely(sdebug_verbose &&
8060 !(SDEBUG_OPT_NO_CDB_NOISE & sdebug_opts))) {
8061 char b[120];
8062 int n, len, sb;
8063
8064 len = scp->cmd_len;
8065 sb = (int)sizeof(b);
8066 if (len > 32)
8067 strcpy(b, "too long, over 32 bytes");
8068 else {
8069 for (k = 0, n = 0; k < len && n < sb; ++k)
8070 n += scnprintf(b + n, sb - n, "%02x ",
8071 (u32)cmd[k]);
8072 }
8073 sdev_printk(KERN_INFO, sdp, "%s: tag=%#x, cmd %s\n", my_name,
8074 blk_mq_unique_tag(scsi_cmd_to_rq(scp)), b);
8075 }
8076 if (unlikely(inject_now && (sdebug_opts & SDEBUG_OPT_HOST_BUSY)))
8077 return SCSI_MLQUEUE_HOST_BUSY;
8078 has_wlun_rl = (sdp->lun == SCSI_W_LUN_REPORT_LUNS);
8079 if (unlikely(lun_index >= sdebug_max_luns && !has_wlun_rl))
8080 goto err_out;
8081
8082 sdeb_i = opcode_ind_arr[opcode]; /* fully mapped */
8083 oip = &opcode_info_arr[sdeb_i]; /* safe if table consistent */
8084 devip = (struct sdebug_dev_info *)sdp->hostdata;
8085 if (unlikely(!devip)) {
8086 devip = find_build_dev_info(sdp);
8087 if (NULL == devip)
8088 goto err_out;
8089 }
8090
8091 if (sdebug_timeout_cmd(scp)) {
8092 scmd_printk(KERN_INFO, scp, "timeout command 0x%x\n", opcode);
8093 return 0;
8094 }
8095
8096 ret = sdebug_fail_queue_cmd(scp);
8097 if (ret) {
8098 scmd_printk(KERN_INFO, scp, "fail queue command 0x%x with 0x%x\n",
8099 opcode, ret);
8100 return ret;
8101 }
8102
8103 if (sdebug_fail_cmd(scp, &ret, &err)) {
8104 scmd_printk(KERN_INFO, scp,
8105 "fail command 0x%x with hostbyte=0x%x, "
8106 "driverbyte=0x%x, statusbyte=0x%x, "
8107 "sense_key=0x%x, asc=0x%x, asq=0x%x\n",
8108 opcode, err.host_byte, err.driver_byte,
8109 err.status_byte, err.sense_key, err.asc, err.asq);
8110 return ret;
8111 }
8112
8113 if (unlikely(inject_now && !atomic_read(&sdeb_inject_pending)))
8114 atomic_set(&sdeb_inject_pending, 1);
8115
8116 na = oip->num_attached;
8117 r_pfp = oip->pfp;
8118 if (na) { /* multiple commands with this opcode */
8119 r_oip = oip;
8120 if (FF_SA & r_oip->flags) {
8121 if (F_SA_LOW & oip->flags)
8122 sa = 0x1f & cmd[1];
8123 else
8124 sa = get_unaligned_be16(cmd + 8);
8125 for (k = 0; k <= na; oip = r_oip->arrp + k++) {
8126 if (opcode == oip->opcode && sa == oip->sa)
8127 break;
8128 }
8129 } else { /* since no service action only check opcode */
8130 for (k = 0; k <= na; oip = r_oip->arrp + k++) {
8131 if (opcode == oip->opcode)
8132 break;
8133 }
8134 }
8135 if (k > na) {
8136 if (F_SA_LOW & r_oip->flags)
8137 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 4);
8138 else if (F_SA_HIGH & r_oip->flags)
8139 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 8, 7);
8140 else
8141 mk_sense_invalid_opcode(scp);
8142 goto check_cond;
8143 }
8144 } /* else (when na==0) we assume the oip is a match */
8145 flags = oip->flags;
8146 if (unlikely(F_INV_OP & flags)) {
8147 mk_sense_invalid_opcode(scp);
8148 goto check_cond;
8149 }
8150 if (unlikely(has_wlun_rl && !(F_RL_WLUN_OK & flags))) {
8151 if (sdebug_verbose)
8152 sdev_printk(KERN_INFO, sdp, "%s: Opcode 0x%x not%s\n",
8153 my_name, opcode, " supported for wlun");
8154 mk_sense_invalid_opcode(scp);
8155 goto check_cond;
8156 }
8157 if (unlikely(sdebug_strict)) { /* check cdb against mask */
8158 u8 rem;
8159 int j;
8160
8161 for (k = 1; k < oip->len_mask[0] && k < 16; ++k) {
8162 rem = ~oip->len_mask[k] & cmd[k];
8163 if (rem) {
8164 for (j = 7; j >= 0; --j, rem <<= 1) {
8165 if (0x80 & rem)
8166 break;
8167 }
8168 mk_sense_invalid_fld(scp, SDEB_IN_CDB, k, j);
8169 goto check_cond;
8170 }
8171 }
8172 }
8173 if (unlikely(!(F_SKIP_UA & flags) &&
8174 find_first_bit(devip->uas_bm,
8175 SDEBUG_NUM_UAS) != SDEBUG_NUM_UAS)) {
8176 errsts = make_ua(scp, devip);
8177 if (errsts)
8178 goto check_cond;
8179 }
8180 if (unlikely(((F_M_ACCESS & flags) || scp->cmnd[0] == TEST_UNIT_READY) &&
8181 atomic_read(&devip->stopped))) {
8182 errsts = resp_not_ready(scp, devip);
8183 if (errsts)
8184 goto fini;
8185 }
8186 if (sdebug_fake_rw && (F_FAKE_RW & flags))
8187 goto fini;
8188 if (unlikely(sdebug_every_nth)) {
8189 if (fake_timeout(scp))
8190 return 0; /* ignore command: make trouble */
8191 }
8192 if (likely(oip->pfp))
8193 pfp = oip->pfp; /* calls a resp_* function */
8194 else
8195 pfp = r_pfp; /* if leaf function ptr NULL, try the root's */
8196
8197fini:
8198 if (F_DELAY_OVERR & flags) /* cmds like INQUIRY respond asap */
8199 return schedule_resp(scp, devip, errsts, pfp, 0, 0);
8200 else if ((flags & F_LONG_DELAY) && (sdebug_jdelay > 0 ||
8201 sdebug_ndelay > 10000)) {
8202 /*
8203 * Skip long delays if ndelay <= 10 microseconds. Otherwise
8204 * for Start Stop Unit (SSU) want at least 1 second delay and
8205 * if sdebug_jdelay>1 want a long delay of that many seconds.
8206 * For Synchronize Cache want 1/20 of SSU's delay.
8207 */
8208 int jdelay = (sdebug_jdelay < 2) ? 1 : sdebug_jdelay;
8209 int denom = (flags & F_SYNC_DELAY) ? 20 : 1;
8210
8211 jdelay = mult_frac(USER_HZ * jdelay, HZ, denom * USER_HZ);
8212 return schedule_resp(scp, devip, errsts, pfp, jdelay, 0);
8213 } else
8214 return schedule_resp(scp, devip, errsts, pfp, sdebug_jdelay,
8215 sdebug_ndelay);
8216check_cond:
8217 return schedule_resp(scp, devip, check_condition_result, NULL, 0, 0);
8218err_out:
8219 return schedule_resp(scp, NULL, DID_NO_CONNECT << 16, NULL, 0, 0);
8220}
8221
8222static int sdebug_init_cmd_priv(struct Scsi_Host *shost, struct scsi_cmnd *cmd)
8223{
8224 struct sdebug_scsi_cmd *sdsc = scsi_cmd_priv(cmd);
8225
8226 spin_lock_init(&sdsc->lock);
8227
8228 return 0;
8229}
8230
8231static struct scsi_host_template sdebug_driver_template = {
8232 .show_info = scsi_debug_show_info,
8233 .write_info = scsi_debug_write_info,
8234 .proc_name = sdebug_proc_name,
8235 .name = "SCSI DEBUG",
8236 .info = scsi_debug_info,
8237 .slave_alloc = scsi_debug_slave_alloc,
8238 .slave_configure = scsi_debug_slave_configure,
8239 .slave_destroy = scsi_debug_slave_destroy,
8240 .ioctl = scsi_debug_ioctl,
8241 .queuecommand = scsi_debug_queuecommand,
8242 .change_queue_depth = sdebug_change_qdepth,
8243 .map_queues = sdebug_map_queues,
8244 .mq_poll = sdebug_blk_mq_poll,
8245 .eh_abort_handler = scsi_debug_abort,
8246 .eh_device_reset_handler = scsi_debug_device_reset,
8247 .eh_target_reset_handler = scsi_debug_target_reset,
8248 .eh_bus_reset_handler = scsi_debug_bus_reset,
8249 .eh_host_reset_handler = scsi_debug_host_reset,
8250 .can_queue = SDEBUG_CANQUEUE,
8251 .this_id = 7,
8252 .sg_tablesize = SG_MAX_SEGMENTS,
8253 .cmd_per_lun = DEF_CMD_PER_LUN,
8254 .max_sectors = -1U,
8255 .max_segment_size = -1U,
8256 .module = THIS_MODULE,
8257 .track_queue_depth = 1,
8258 .cmd_size = sizeof(struct sdebug_scsi_cmd),
8259 .init_cmd_priv = sdebug_init_cmd_priv,
8260 .target_alloc = sdebug_target_alloc,
8261 .target_destroy = sdebug_target_destroy,
8262};
8263
8264static int sdebug_driver_probe(struct device *dev)
8265{
8266 int error = 0;
8267 struct sdebug_host_info *sdbg_host;
8268 struct Scsi_Host *hpnt;
8269 int hprot;
8270
8271 sdbg_host = dev_to_sdebug_host(dev);
8272
8273 sdebug_driver_template.can_queue = sdebug_max_queue;
8274 sdebug_driver_template.cmd_per_lun = sdebug_max_queue;
8275 if (!sdebug_clustering)
8276 sdebug_driver_template.dma_boundary = PAGE_SIZE - 1;
8277
8278 hpnt = scsi_host_alloc(&sdebug_driver_template, 0);
8279 if (NULL == hpnt) {
8280 pr_err("scsi_host_alloc failed\n");
8281 error = -ENODEV;
8282 return error;
8283 }
8284 if (submit_queues > nr_cpu_ids) {
8285 pr_warn("%s: trim submit_queues (was %d) to nr_cpu_ids=%u\n",
8286 my_name, submit_queues, nr_cpu_ids);
8287 submit_queues = nr_cpu_ids;
8288 }
8289 /*
8290 * Decide whether to tell scsi subsystem that we want mq. The
8291 * following should give the same answer for each host.
8292 */
8293 hpnt->nr_hw_queues = submit_queues;
8294 if (sdebug_host_max_queue)
8295 hpnt->host_tagset = 1;
8296
8297 /* poll queues are possible for nr_hw_queues > 1 */
8298 if (hpnt->nr_hw_queues == 1 || (poll_queues < 1)) {
8299 pr_warn("%s: trim poll_queues to 0. poll_q/nr_hw = (%d/%d)\n",
8300 my_name, poll_queues, hpnt->nr_hw_queues);
8301 poll_queues = 0;
8302 }
8303
8304 /*
8305 * Poll queues don't need interrupts, but we need at least one I/O queue
8306 * left over for non-polled I/O.
8307 * If condition not met, trim poll_queues to 1 (just for simplicity).
8308 */
8309 if (poll_queues >= submit_queues) {
8310 if (submit_queues < 3)
8311 pr_warn("%s: trim poll_queues to 1\n", my_name);
8312 else
8313 pr_warn("%s: trim poll_queues to 1. Perhaps try poll_queues=%d\n",
8314 my_name, submit_queues - 1);
8315 poll_queues = 1;
8316 }
8317 if (poll_queues)
8318 hpnt->nr_maps = 3;
8319
8320 sdbg_host->shost = hpnt;
8321 if ((hpnt->this_id >= 0) && (sdebug_num_tgts > hpnt->this_id))
8322 hpnt->max_id = sdebug_num_tgts + 1;
8323 else
8324 hpnt->max_id = sdebug_num_tgts;
8325 /* = sdebug_max_luns; */
8326 hpnt->max_lun = SCSI_W_LUN_REPORT_LUNS + 1;
8327
8328 hprot = 0;
8329
8330 switch (sdebug_dif) {
8331
8332 case T10_PI_TYPE1_PROTECTION:
8333 hprot = SHOST_DIF_TYPE1_PROTECTION;
8334 if (sdebug_dix)
8335 hprot |= SHOST_DIX_TYPE1_PROTECTION;
8336 break;
8337
8338 case T10_PI_TYPE2_PROTECTION:
8339 hprot = SHOST_DIF_TYPE2_PROTECTION;
8340 if (sdebug_dix)
8341 hprot |= SHOST_DIX_TYPE2_PROTECTION;
8342 break;
8343
8344 case T10_PI_TYPE3_PROTECTION:
8345 hprot = SHOST_DIF_TYPE3_PROTECTION;
8346 if (sdebug_dix)
8347 hprot |= SHOST_DIX_TYPE3_PROTECTION;
8348 break;
8349
8350 default:
8351 if (sdebug_dix)
8352 hprot |= SHOST_DIX_TYPE0_PROTECTION;
8353 break;
8354 }
8355
8356 scsi_host_set_prot(hpnt, hprot);
8357
8358 if (have_dif_prot || sdebug_dix)
8359 pr_info("host protection%s%s%s%s%s%s%s\n",
8360 (hprot & SHOST_DIF_TYPE1_PROTECTION) ? " DIF1" : "",
8361 (hprot & SHOST_DIF_TYPE2_PROTECTION) ? " DIF2" : "",
8362 (hprot & SHOST_DIF_TYPE3_PROTECTION) ? " DIF3" : "",
8363 (hprot & SHOST_DIX_TYPE0_PROTECTION) ? " DIX0" : "",
8364 (hprot & SHOST_DIX_TYPE1_PROTECTION) ? " DIX1" : "",
8365 (hprot & SHOST_DIX_TYPE2_PROTECTION) ? " DIX2" : "",
8366 (hprot & SHOST_DIX_TYPE3_PROTECTION) ? " DIX3" : "");
8367
8368 if (sdebug_guard == 1)
8369 scsi_host_set_guard(hpnt, SHOST_DIX_GUARD_IP);
8370 else
8371 scsi_host_set_guard(hpnt, SHOST_DIX_GUARD_CRC);
8372
8373 sdebug_verbose = !!(SDEBUG_OPT_NOISE & sdebug_opts);
8374 sdebug_any_injecting_opt = !!(SDEBUG_OPT_ALL_INJECTING & sdebug_opts);
8375 if (sdebug_every_nth) /* need stats counters for every_nth */
8376 sdebug_statistics = true;
8377 error = scsi_add_host(hpnt, &sdbg_host->dev);
8378 if (error) {
8379 pr_err("scsi_add_host failed\n");
8380 error = -ENODEV;
8381 scsi_host_put(hpnt);
8382 } else {
8383 scsi_scan_host(hpnt);
8384 }
8385
8386 return error;
8387}
8388
8389static void sdebug_driver_remove(struct device *dev)
8390{
8391 struct sdebug_host_info *sdbg_host;
8392 struct sdebug_dev_info *sdbg_devinfo, *tmp;
8393
8394 sdbg_host = dev_to_sdebug_host(dev);
8395
8396 scsi_remove_host(sdbg_host->shost);
8397
8398 list_for_each_entry_safe(sdbg_devinfo, tmp, &sdbg_host->dev_info_list,
8399 dev_list) {
8400 list_del(&sdbg_devinfo->dev_list);
8401 kfree(sdbg_devinfo->zstate);
8402 kfree(sdbg_devinfo);
8403 }
8404
8405 scsi_host_put(sdbg_host->shost);
8406}
8407
8408static struct bus_type pseudo_lld_bus = {
8409 .name = "pseudo",
8410 .probe = sdebug_driver_probe,
8411 .remove = sdebug_driver_remove,
8412 .drv_groups = sdebug_drv_groups,
8413};
1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * vvvvvvvvvvvvvvvvvvvvvvv Original vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv
4 * Copyright (C) 1992 Eric Youngdale
5 * Simulate a host adapter with 2 disks attached. Do a lot of checking
6 * to make sure that we are not getting blocks mixed up, and PANIC if
7 * anything out of the ordinary is seen.
8 * ^^^^^^^^^^^^^^^^^^^^^^^ Original ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
9 *
10 * Copyright (C) 2001 - 2021 Douglas Gilbert
11 *
12 * For documentation see http://sg.danny.cz/sg/scsi_debug.html
13 */
14
15
16#define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__
17
18#include <linux/module.h>
19#include <linux/align.h>
20#include <linux/kernel.h>
21#include <linux/errno.h>
22#include <linux/jiffies.h>
23#include <linux/slab.h>
24#include <linux/types.h>
25#include <linux/string.h>
26#include <linux/fs.h>
27#include <linux/init.h>
28#include <linux/proc_fs.h>
29#include <linux/vmalloc.h>
30#include <linux/moduleparam.h>
31#include <linux/scatterlist.h>
32#include <linux/blkdev.h>
33#include <linux/crc-t10dif.h>
34#include <linux/spinlock.h>
35#include <linux/interrupt.h>
36#include <linux/atomic.h>
37#include <linux/hrtimer.h>
38#include <linux/uuid.h>
39#include <linux/t10-pi.h>
40#include <linux/msdos_partition.h>
41#include <linux/random.h>
42#include <linux/xarray.h>
43#include <linux/prefetch.h>
44#include <linux/debugfs.h>
45#include <linux/async.h>
46#include <linux/cleanup.h>
47
48#include <net/checksum.h>
49
50#include <linux/unaligned.h>
51
52#include <scsi/scsi.h>
53#include <scsi/scsi_cmnd.h>
54#include <scsi/scsi_device.h>
55#include <scsi/scsi_host.h>
56#include <scsi/scsicam.h>
57#include <scsi/scsi_eh.h>
58#include <scsi/scsi_tcq.h>
59#include <scsi/scsi_dbg.h>
60
61#include "sd.h"
62#include "scsi_logging.h"
63
64/* make sure inq_product_rev string corresponds to this version */
65#define SDEBUG_VERSION "0191" /* format to fit INQUIRY revision field */
66static const char *sdebug_version_date = "20210520";
67
68#define MY_NAME "scsi_debug"
69
70/* Additional Sense Code (ASC) */
71#define NO_ADDITIONAL_SENSE 0x0
72#define OVERLAP_ATOMIC_COMMAND_ASC 0x0
73#define OVERLAP_ATOMIC_COMMAND_ASCQ 0x23
74#define LOGICAL_UNIT_NOT_READY 0x4
75#define LOGICAL_UNIT_COMMUNICATION_FAILURE 0x8
76#define UNRECOVERED_READ_ERR 0x11
77#define PARAMETER_LIST_LENGTH_ERR 0x1a
78#define INVALID_OPCODE 0x20
79#define LBA_OUT_OF_RANGE 0x21
80#define INVALID_FIELD_IN_CDB 0x24
81#define INVALID_FIELD_IN_PARAM_LIST 0x26
82#define WRITE_PROTECTED 0x27
83#define UA_RESET_ASC 0x29
84#define UA_CHANGED_ASC 0x2a
85#define TARGET_CHANGED_ASC 0x3f
86#define LUNS_CHANGED_ASCQ 0x0e
87#define INSUFF_RES_ASC 0x55
88#define INSUFF_RES_ASCQ 0x3
89#define POWER_ON_RESET_ASCQ 0x0
90#define POWER_ON_OCCURRED_ASCQ 0x1
91#define BUS_RESET_ASCQ 0x2 /* scsi bus reset occurred */
92#define MODE_CHANGED_ASCQ 0x1 /* mode parameters changed */
93#define CAPACITY_CHANGED_ASCQ 0x9
94#define SAVING_PARAMS_UNSUP 0x39
95#define TRANSPORT_PROBLEM 0x4b
96#define THRESHOLD_EXCEEDED 0x5d
97#define LOW_POWER_COND_ON 0x5e
98#define MISCOMPARE_VERIFY_ASC 0x1d
99#define MICROCODE_CHANGED_ASCQ 0x1 /* with TARGET_CHANGED_ASC */
100#define MICROCODE_CHANGED_WO_RESET_ASCQ 0x16
101#define WRITE_ERROR_ASC 0xc
102#define UNALIGNED_WRITE_ASCQ 0x4
103#define WRITE_BOUNDARY_ASCQ 0x5
104#define READ_INVDATA_ASCQ 0x6
105#define READ_BOUNDARY_ASCQ 0x7
106#define ATTEMPT_ACCESS_GAP 0x9
107#define INSUFF_ZONE_ASCQ 0xe
108/* see drivers/scsi/sense_codes.h */
109
110/* Additional Sense Code Qualifier (ASCQ) */
111#define ACK_NAK_TO 0x3
112
113/* Default values for driver parameters */
114#define DEF_NUM_HOST 1
115#define DEF_NUM_TGTS 1
116#define DEF_MAX_LUNS 1
117/* With these defaults, this driver will make 1 host with 1 target
118 * (id 0) containing 1 logical unit (lun 0). That is 1 device.
119 */
120#define DEF_ATO 1
121#define DEF_CDB_LEN 10
122#define DEF_JDELAY 1 /* if > 0 unit is a jiffy */
123#define DEF_DEV_SIZE_PRE_INIT 0
124#define DEF_DEV_SIZE_MB 8
125#define DEF_ZBC_DEV_SIZE_MB 128
126#define DEF_DIF 0
127#define DEF_DIX 0
128#define DEF_PER_HOST_STORE false
129#define DEF_D_SENSE 0
130#define DEF_EVERY_NTH 0
131#define DEF_FAKE_RW 0
132#define DEF_GUARD 0
133#define DEF_HOST_LOCK 0
134#define DEF_LBPU 0
135#define DEF_LBPWS 0
136#define DEF_LBPWS10 0
137#define DEF_LBPRZ 1
138#define DEF_LOWEST_ALIGNED 0
139#define DEF_NDELAY 0 /* if > 0 unit is a nanosecond */
140#define DEF_NO_LUN_0 0
141#define DEF_NUM_PARTS 0
142#define DEF_OPTS 0
143#define DEF_OPT_BLKS 1024
144#define DEF_PHYSBLK_EXP 0
145#define DEF_OPT_XFERLEN_EXP 0
146#define DEF_PTYPE TYPE_DISK
147#define DEF_RANDOM false
148#define DEF_REMOVABLE false
149#define DEF_SCSI_LEVEL 7 /* INQUIRY, byte2 [6->SPC-4; 7->SPC-5] */
150#define DEF_SECTOR_SIZE 512
151#define DEF_UNMAP_ALIGNMENT 0
152#define DEF_UNMAP_GRANULARITY 1
153#define DEF_UNMAP_MAX_BLOCKS 0xFFFFFFFF
154#define DEF_UNMAP_MAX_DESC 256
155#define DEF_VIRTUAL_GB 0
156#define DEF_VPD_USE_HOSTNO 1
157#define DEF_WRITESAME_LENGTH 0xFFFF
158#define DEF_ATOMIC_WR 0
159#define DEF_ATOMIC_WR_MAX_LENGTH 8192
160#define DEF_ATOMIC_WR_ALIGN 2
161#define DEF_ATOMIC_WR_GRAN 2
162#define DEF_ATOMIC_WR_MAX_LENGTH_BNDRY (DEF_ATOMIC_WR_MAX_LENGTH)
163#define DEF_ATOMIC_WR_MAX_BNDRY 128
164#define DEF_STRICT 0
165#define DEF_STATISTICS false
166#define DEF_SUBMIT_QUEUES 1
167#define DEF_TUR_MS_TO_READY 0
168#define DEF_UUID_CTL 0
169#define JDELAY_OVERRIDDEN -9999
170
171/* Default parameters for ZBC drives */
172#define DEF_ZBC_ZONE_SIZE_MB 128
173#define DEF_ZBC_MAX_OPEN_ZONES 8
174#define DEF_ZBC_NR_CONV_ZONES 1
175
176#define SDEBUG_LUN_0_VAL 0
177
178/* bit mask values for sdebug_opts */
179#define SDEBUG_OPT_NOISE 1
180#define SDEBUG_OPT_MEDIUM_ERR 2
181#define SDEBUG_OPT_TIMEOUT 4
182#define SDEBUG_OPT_RECOVERED_ERR 8
183#define SDEBUG_OPT_TRANSPORT_ERR 16
184#define SDEBUG_OPT_DIF_ERR 32
185#define SDEBUG_OPT_DIX_ERR 64
186#define SDEBUG_OPT_MAC_TIMEOUT 128
187#define SDEBUG_OPT_SHORT_TRANSFER 0x100
188#define SDEBUG_OPT_Q_NOISE 0x200
189#define SDEBUG_OPT_ALL_TSF 0x400 /* ignore */
190#define SDEBUG_OPT_RARE_TSF 0x800
191#define SDEBUG_OPT_N_WCE 0x1000
192#define SDEBUG_OPT_RESET_NOISE 0x2000
193#define SDEBUG_OPT_NO_CDB_NOISE 0x4000
194#define SDEBUG_OPT_HOST_BUSY 0x8000
195#define SDEBUG_OPT_CMD_ABORT 0x10000
196#define SDEBUG_OPT_ALL_NOISE (SDEBUG_OPT_NOISE | SDEBUG_OPT_Q_NOISE | \
197 SDEBUG_OPT_RESET_NOISE)
198#define SDEBUG_OPT_ALL_INJECTING (SDEBUG_OPT_RECOVERED_ERR | \
199 SDEBUG_OPT_TRANSPORT_ERR | \
200 SDEBUG_OPT_DIF_ERR | SDEBUG_OPT_DIX_ERR | \
201 SDEBUG_OPT_SHORT_TRANSFER | \
202 SDEBUG_OPT_HOST_BUSY | \
203 SDEBUG_OPT_CMD_ABORT)
204#define SDEBUG_OPT_RECOV_DIF_DIX (SDEBUG_OPT_RECOVERED_ERR | \
205 SDEBUG_OPT_DIF_ERR | SDEBUG_OPT_DIX_ERR)
206
207/* As indicated in SAM-5 and SPC-4 Unit Attentions (UAs) are returned in
208 * priority order. In the subset implemented here lower numbers have higher
209 * priority. The UA numbers should be a sequence starting from 0 with
210 * SDEBUG_NUM_UAS being 1 higher than the highest numbered UA. */
211#define SDEBUG_UA_POR 0 /* Power on, reset, or bus device reset */
212#define SDEBUG_UA_POOCCUR 1 /* Power on occurred */
213#define SDEBUG_UA_BUS_RESET 2
214#define SDEBUG_UA_MODE_CHANGED 3
215#define SDEBUG_UA_CAPACITY_CHANGED 4
216#define SDEBUG_UA_LUNS_CHANGED 5
217#define SDEBUG_UA_MICROCODE_CHANGED 6 /* simulate firmware change */
218#define SDEBUG_UA_MICROCODE_CHANGED_WO_RESET 7
219#define SDEBUG_NUM_UAS 8
220
221/* when 1==SDEBUG_OPT_MEDIUM_ERR, a medium error is simulated at this
222 * sector on read commands: */
223#define OPT_MEDIUM_ERR_ADDR 0x1234 /* that's sector 4660 in decimal */
224#define OPT_MEDIUM_ERR_NUM 10 /* number of consecutive medium errs */
225
226/* SDEBUG_CANQUEUE is the maximum number of commands that can be queued
227 * (for response) per submit queue at one time. Can be reduced by max_queue
228 * option. Command responses are not queued when jdelay=0 and ndelay=0. The
229 * per-device DEF_CMD_PER_LUN can be changed via sysfs:
230 * /sys/class/scsi_device/<h:c:t:l>/device/queue_depth
231 * but cannot exceed SDEBUG_CANQUEUE .
232 */
233#define SDEBUG_CANQUEUE_WORDS 3 /* a WORD is bits in a long */
234#define SDEBUG_CANQUEUE (SDEBUG_CANQUEUE_WORDS * BITS_PER_LONG)
235#define DEF_CMD_PER_LUN SDEBUG_CANQUEUE
236
237/* UA - Unit Attention; SA - Service Action; SSU - Start Stop Unit */
238#define F_D_IN 1 /* Data-in command (e.g. READ) */
239#define F_D_OUT 2 /* Data-out command (e.g. WRITE) */
240#define F_D_OUT_MAYBE 4 /* WRITE SAME, NDOB bit */
241#define F_D_UNKN 8
242#define F_RL_WLUN_OK 0x10 /* allowed with REPORT LUNS W-LUN */
243#define F_SKIP_UA 0x20 /* bypass UAs (e.g. INQUIRY command) */
244#define F_DELAY_OVERR 0x40 /* for commands like INQUIRY */
245#define F_SA_LOW 0x80 /* SA is in cdb byte 1, bits 4 to 0 */
246#define F_SA_HIGH 0x100 /* SA is in cdb bytes 8 and 9 */
247#define F_INV_OP 0x200 /* invalid opcode (not supported) */
248#define F_FAKE_RW 0x400 /* bypass resp_*() when fake_rw set */
249#define F_M_ACCESS 0x800 /* media access, reacts to SSU state */
250#define F_SSU_DELAY 0x1000 /* SSU command delay (long-ish) */
251#define F_SYNC_DELAY 0x2000 /* SYNCHRONIZE CACHE delay */
252
253/* Useful combinations of the above flags */
254#define FF_RESPOND (F_RL_WLUN_OK | F_SKIP_UA | F_DELAY_OVERR)
255#define FF_MEDIA_IO (F_M_ACCESS | F_FAKE_RW)
256#define FF_SA (F_SA_HIGH | F_SA_LOW)
257#define F_LONG_DELAY (F_SSU_DELAY | F_SYNC_DELAY)
258
259#define SDEBUG_MAX_PARTS 4
260
261#define SDEBUG_MAX_CMD_LEN 32
262
263#define SDEB_XA_NOT_IN_USE XA_MARK_1
264
265static struct kmem_cache *queued_cmd_cache;
266
267#define TO_QUEUED_CMD(scmd) ((void *)(scmd)->host_scribble)
268#define ASSIGN_QUEUED_CMD(scmnd, qc) { (scmnd)->host_scribble = (void *) qc; }
269
270/* Zone types (zbcr05 table 25) */
271enum sdebug_z_type {
272 ZBC_ZTYPE_CNV = 0x1,
273 ZBC_ZTYPE_SWR = 0x2,
274 ZBC_ZTYPE_SWP = 0x3,
275 /* ZBC_ZTYPE_SOBR = 0x4, */
276 ZBC_ZTYPE_GAP = 0x5,
277};
278
279/* enumeration names taken from table 26, zbcr05 */
280enum sdebug_z_cond {
281 ZBC_NOT_WRITE_POINTER = 0x0,
282 ZC1_EMPTY = 0x1,
283 ZC2_IMPLICIT_OPEN = 0x2,
284 ZC3_EXPLICIT_OPEN = 0x3,
285 ZC4_CLOSED = 0x4,
286 ZC6_READ_ONLY = 0xd,
287 ZC5_FULL = 0xe,
288 ZC7_OFFLINE = 0xf,
289};
290
291struct sdeb_zone_state { /* ZBC: per zone state */
292 enum sdebug_z_type z_type;
293 enum sdebug_z_cond z_cond;
294 bool z_non_seq_resource;
295 unsigned int z_size;
296 sector_t z_start;
297 sector_t z_wp;
298};
299
300enum sdebug_err_type {
301 ERR_TMOUT_CMD = 0, /* make specific scsi command timeout */
302 ERR_FAIL_QUEUE_CMD = 1, /* make specific scsi command's */
303 /* queuecmd return failed */
304 ERR_FAIL_CMD = 2, /* make specific scsi command's */
305 /* queuecmd return succeed but */
306 /* with errors set in scsi_cmnd */
307 ERR_ABORT_CMD_FAILED = 3, /* control return FAILED from */
308 /* scsi_debug_abort() */
309 ERR_LUN_RESET_FAILED = 4, /* control return FAILED from */
310 /* scsi_debug_device_reseLUN_RESET_FAILEDt() */
311};
312
313struct sdebug_err_inject {
314 int type;
315 struct list_head list;
316 int cnt;
317 unsigned char cmd;
318 struct rcu_head rcu;
319
320 union {
321 /*
322 * For ERR_FAIL_QUEUE_CMD
323 */
324 int queuecmd_ret;
325
326 /*
327 * For ERR_FAIL_CMD
328 */
329 struct {
330 unsigned char host_byte;
331 unsigned char driver_byte;
332 unsigned char status_byte;
333 unsigned char sense_key;
334 unsigned char asc;
335 unsigned char asq;
336 };
337 };
338};
339
340struct sdebug_dev_info {
341 struct list_head dev_list;
342 unsigned int channel;
343 unsigned int target;
344 u64 lun;
345 uuid_t lu_name;
346 struct sdebug_host_info *sdbg_host;
347 unsigned long uas_bm[1];
348 atomic_t stopped; /* 1: by SSU, 2: device start */
349 bool used;
350
351 /* For ZBC devices */
352 bool zoned;
353 unsigned int zcap;
354 unsigned int zsize;
355 unsigned int zsize_shift;
356 unsigned int nr_zones;
357 unsigned int nr_conv_zones;
358 unsigned int nr_seq_zones;
359 unsigned int nr_imp_open;
360 unsigned int nr_exp_open;
361 unsigned int nr_closed;
362 unsigned int max_open;
363 ktime_t create_ts; /* time since bootup that this device was created */
364 struct sdeb_zone_state *zstate;
365
366 struct dentry *debugfs_entry;
367 struct spinlock list_lock;
368 struct list_head inject_err_list;
369};
370
371struct sdebug_target_info {
372 bool reset_fail;
373 struct dentry *debugfs_entry;
374};
375
376struct sdebug_host_info {
377 struct list_head host_list;
378 int si_idx; /* sdeb_store_info (per host) xarray index */
379 struct Scsi_Host *shost;
380 struct device dev;
381 struct list_head dev_info_list;
382};
383
384/* There is an xarray of pointers to this struct's objects, one per host */
385struct sdeb_store_info {
386 rwlock_t macc_data_lck; /* for media data access on this store */
387 rwlock_t macc_meta_lck; /* for atomic media meta access on this store */
388 rwlock_t macc_sector_lck; /* per-sector media data access on this store */
389 u8 *storep; /* user data storage (ram) */
390 struct t10_pi_tuple *dif_storep; /* protection info */
391 void *map_storep; /* provisioning map */
392};
393
394#define dev_to_sdebug_host(d) \
395 container_of(d, struct sdebug_host_info, dev)
396
397#define shost_to_sdebug_host(shost) \
398 dev_to_sdebug_host(shost->dma_dev)
399
400enum sdeb_defer_type {SDEB_DEFER_NONE = 0, SDEB_DEFER_HRT = 1,
401 SDEB_DEFER_WQ = 2, SDEB_DEFER_POLL = 3};
402
403struct sdebug_defer {
404 struct hrtimer hrt;
405 struct execute_work ew;
406 ktime_t cmpl_ts;/* time since boot to complete this cmd */
407 int issuing_cpu;
408 bool aborted; /* true when blk_abort_request() already called */
409 enum sdeb_defer_type defer_t;
410};
411
412struct sdebug_device_access_info {
413 bool atomic_write;
414 u64 lba;
415 u32 num;
416 struct scsi_cmnd *self;
417};
418
419struct sdebug_queued_cmd {
420 /* corresponding bit set in in_use_bm[] in owning struct sdebug_queue
421 * instance indicates this slot is in use.
422 */
423 struct sdebug_defer sd_dp;
424 struct scsi_cmnd *scmd;
425 struct sdebug_device_access_info *i;
426};
427
428struct sdebug_scsi_cmd {
429 spinlock_t lock;
430};
431
432static atomic_t sdebug_cmnd_count; /* number of incoming commands */
433static atomic_t sdebug_completions; /* count of deferred completions */
434static atomic_t sdebug_miss_cpus; /* submission + completion cpus differ */
435static atomic_t sdebug_a_tsf; /* 'almost task set full' counter */
436static atomic_t sdeb_inject_pending;
437static atomic_t sdeb_mq_poll_count; /* bumped when mq_poll returns > 0 */
438
439struct opcode_info_t {
440 u8 num_attached; /* 0 if this is it (i.e. a leaf); use 0xff */
441 /* for terminating element */
442 u8 opcode; /* if num_attached > 0, preferred */
443 u16 sa; /* service action */
444 u32 flags; /* OR-ed set of SDEB_F_* */
445 int (*pfp)(struct scsi_cmnd *, struct sdebug_dev_info *);
446 const struct opcode_info_t *arrp; /* num_attached elements or NULL */
447 u8 len_mask[16]; /* len_mask[0]-->cdb_len, then mask for cdb */
448 /* 1 to min(cdb_len, 15); ignore cdb[15...] */
449};
450
451/* SCSI opcodes (first byte of cdb) of interest mapped onto these indexes */
452enum sdeb_opcode_index {
453 SDEB_I_INVALID_OPCODE = 0,
454 SDEB_I_INQUIRY = 1,
455 SDEB_I_REPORT_LUNS = 2,
456 SDEB_I_REQUEST_SENSE = 3,
457 SDEB_I_TEST_UNIT_READY = 4,
458 SDEB_I_MODE_SENSE = 5, /* 6, 10 */
459 SDEB_I_MODE_SELECT = 6, /* 6, 10 */
460 SDEB_I_LOG_SENSE = 7,
461 SDEB_I_READ_CAPACITY = 8, /* 10; 16 is in SA_IN(16) */
462 SDEB_I_READ = 9, /* 6, 10, 12, 16 */
463 SDEB_I_WRITE = 10, /* 6, 10, 12, 16 */
464 SDEB_I_START_STOP = 11,
465 SDEB_I_SERV_ACT_IN_16 = 12, /* add ...SERV_ACT_IN_12 if needed */
466 SDEB_I_SERV_ACT_OUT_16 = 13, /* add ...SERV_ACT_OUT_12 if needed */
467 SDEB_I_MAINT_IN = 14,
468 SDEB_I_MAINT_OUT = 15,
469 SDEB_I_VERIFY = 16, /* VERIFY(10), VERIFY(16) */
470 SDEB_I_VARIABLE_LEN = 17, /* READ(32), WRITE(32), WR_SCAT(32) */
471 SDEB_I_RESERVE = 18, /* 6, 10 */
472 SDEB_I_RELEASE = 19, /* 6, 10 */
473 SDEB_I_ALLOW_REMOVAL = 20, /* PREVENT ALLOW MEDIUM REMOVAL */
474 SDEB_I_REZERO_UNIT = 21, /* REWIND in SSC */
475 SDEB_I_ATA_PT = 22, /* 12, 16 */
476 SDEB_I_SEND_DIAG = 23,
477 SDEB_I_UNMAP = 24,
478 SDEB_I_WRITE_BUFFER = 25,
479 SDEB_I_WRITE_SAME = 26, /* 10, 16 */
480 SDEB_I_SYNC_CACHE = 27, /* 10, 16 */
481 SDEB_I_COMP_WRITE = 28,
482 SDEB_I_PRE_FETCH = 29, /* 10, 16 */
483 SDEB_I_ZONE_OUT = 30, /* 0x94+SA; includes no data xfer */
484 SDEB_I_ZONE_IN = 31, /* 0x95+SA; all have data-in */
485 SDEB_I_ATOMIC_WRITE_16 = 32,
486 SDEB_I_LAST_ELEM_P1 = 33, /* keep this last (previous + 1) */
487};
488
489
490static const unsigned char opcode_ind_arr[256] = {
491/* 0x0; 0x0->0x1f: 6 byte cdbs */
492 SDEB_I_TEST_UNIT_READY, SDEB_I_REZERO_UNIT, 0, SDEB_I_REQUEST_SENSE,
493 0, 0, 0, 0,
494 SDEB_I_READ, 0, SDEB_I_WRITE, 0, 0, 0, 0, 0,
495 0, 0, SDEB_I_INQUIRY, 0, 0, SDEB_I_MODE_SELECT, SDEB_I_RESERVE,
496 SDEB_I_RELEASE,
497 0, 0, SDEB_I_MODE_SENSE, SDEB_I_START_STOP, 0, SDEB_I_SEND_DIAG,
498 SDEB_I_ALLOW_REMOVAL, 0,
499/* 0x20; 0x20->0x3f: 10 byte cdbs */
500 0, 0, 0, 0, 0, SDEB_I_READ_CAPACITY, 0, 0,
501 SDEB_I_READ, 0, SDEB_I_WRITE, 0, 0, 0, 0, SDEB_I_VERIFY,
502 0, 0, 0, 0, SDEB_I_PRE_FETCH, SDEB_I_SYNC_CACHE, 0, 0,
503 0, 0, 0, SDEB_I_WRITE_BUFFER, 0, 0, 0, 0,
504/* 0x40; 0x40->0x5f: 10 byte cdbs */
505 0, SDEB_I_WRITE_SAME, SDEB_I_UNMAP, 0, 0, 0, 0, 0,
506 0, 0, 0, 0, 0, SDEB_I_LOG_SENSE, 0, 0,
507 0, 0, 0, 0, 0, SDEB_I_MODE_SELECT, SDEB_I_RESERVE,
508 SDEB_I_RELEASE,
509 0, 0, SDEB_I_MODE_SENSE, 0, 0, 0, 0, 0,
510/* 0x60; 0x60->0x7d are reserved, 0x7e is "extended cdb" */
511 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
512 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
513 0, SDEB_I_VARIABLE_LEN,
514/* 0x80; 0x80->0x9f: 16 byte cdbs */
515 0, 0, 0, 0, 0, SDEB_I_ATA_PT, 0, 0,
516 SDEB_I_READ, SDEB_I_COMP_WRITE, SDEB_I_WRITE, 0,
517 0, 0, 0, SDEB_I_VERIFY,
518 SDEB_I_PRE_FETCH, SDEB_I_SYNC_CACHE, 0, SDEB_I_WRITE_SAME,
519 SDEB_I_ZONE_OUT, SDEB_I_ZONE_IN, 0, 0,
520 0, 0, 0, 0,
521 SDEB_I_ATOMIC_WRITE_16, 0, SDEB_I_SERV_ACT_IN_16, SDEB_I_SERV_ACT_OUT_16,
522/* 0xa0; 0xa0->0xbf: 12 byte cdbs */
523 SDEB_I_REPORT_LUNS, SDEB_I_ATA_PT, 0, SDEB_I_MAINT_IN,
524 SDEB_I_MAINT_OUT, 0, 0, 0,
525 SDEB_I_READ, 0 /* SDEB_I_SERV_ACT_OUT_12 */, SDEB_I_WRITE,
526 0 /* SDEB_I_SERV_ACT_IN_12 */, 0, 0, 0, 0,
527 0, 0, 0, 0, 0, 0, 0, 0,
528 0, 0, 0, 0, 0, 0, 0, 0,
529/* 0xc0; 0xc0->0xff: vendor specific */
530 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
531 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
532 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
533 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
534};
535
536/*
537 * The following "response" functions return the SCSI mid-level's 4 byte
538 * tuple-in-an-int. To handle commands with an IMMED bit, for a faster
539 * command completion, they can mask their return value with
540 * SDEG_RES_IMMED_MASK .
541 */
542#define SDEG_RES_IMMED_MASK 0x40000000
543
544static int resp_inquiry(struct scsi_cmnd *, struct sdebug_dev_info *);
545static int resp_report_luns(struct scsi_cmnd *, struct sdebug_dev_info *);
546static int resp_requests(struct scsi_cmnd *, struct sdebug_dev_info *);
547static int resp_mode_sense(struct scsi_cmnd *, struct sdebug_dev_info *);
548static int resp_mode_select(struct scsi_cmnd *, struct sdebug_dev_info *);
549static int resp_log_sense(struct scsi_cmnd *, struct sdebug_dev_info *);
550static int resp_readcap(struct scsi_cmnd *, struct sdebug_dev_info *);
551static int resp_read_dt0(struct scsi_cmnd *, struct sdebug_dev_info *);
552static int resp_write_dt0(struct scsi_cmnd *, struct sdebug_dev_info *);
553static int resp_write_scat(struct scsi_cmnd *, struct sdebug_dev_info *);
554static int resp_start_stop(struct scsi_cmnd *, struct sdebug_dev_info *);
555static int resp_readcap16(struct scsi_cmnd *, struct sdebug_dev_info *);
556static int resp_get_lba_status(struct scsi_cmnd *, struct sdebug_dev_info *);
557static int resp_get_stream_status(struct scsi_cmnd *scp,
558 struct sdebug_dev_info *devip);
559static int resp_report_tgtpgs(struct scsi_cmnd *, struct sdebug_dev_info *);
560static int resp_unmap(struct scsi_cmnd *, struct sdebug_dev_info *);
561static int resp_rsup_opcodes(struct scsi_cmnd *, struct sdebug_dev_info *);
562static int resp_rsup_tmfs(struct scsi_cmnd *, struct sdebug_dev_info *);
563static int resp_verify(struct scsi_cmnd *, struct sdebug_dev_info *);
564static int resp_write_same_10(struct scsi_cmnd *, struct sdebug_dev_info *);
565static int resp_write_same_16(struct scsi_cmnd *, struct sdebug_dev_info *);
566static int resp_comp_write(struct scsi_cmnd *, struct sdebug_dev_info *);
567static int resp_write_buffer(struct scsi_cmnd *, struct sdebug_dev_info *);
568static int resp_sync_cache(struct scsi_cmnd *, struct sdebug_dev_info *);
569static int resp_pre_fetch(struct scsi_cmnd *, struct sdebug_dev_info *);
570static int resp_report_zones(struct scsi_cmnd *, struct sdebug_dev_info *);
571static int resp_atomic_write(struct scsi_cmnd *, struct sdebug_dev_info *);
572static int resp_open_zone(struct scsi_cmnd *, struct sdebug_dev_info *);
573static int resp_close_zone(struct scsi_cmnd *, struct sdebug_dev_info *);
574static int resp_finish_zone(struct scsi_cmnd *, struct sdebug_dev_info *);
575static int resp_rwp_zone(struct scsi_cmnd *, struct sdebug_dev_info *);
576
577static int sdebug_do_add_host(bool mk_new_store);
578static int sdebug_add_host_helper(int per_host_idx);
579static void sdebug_do_remove_host(bool the_end);
580static int sdebug_add_store(void);
581static void sdebug_erase_store(int idx, struct sdeb_store_info *sip);
582static void sdebug_erase_all_stores(bool apart_from_first);
583
584static void sdebug_free_queued_cmd(struct sdebug_queued_cmd *sqcp);
585
586/*
587 * The following are overflow arrays for cdbs that "hit" the same index in
588 * the opcode_info_arr array. The most time sensitive (or commonly used) cdb
589 * should be placed in opcode_info_arr[], the others should be placed here.
590 */
591static const struct opcode_info_t msense_iarr[] = {
592 {0, 0x1a, 0, F_D_IN, NULL, NULL,
593 {6, 0xe8, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
594};
595
596static const struct opcode_info_t mselect_iarr[] = {
597 {0, 0x15, 0, F_D_OUT, NULL, NULL,
598 {6, 0xf1, 0, 0, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
599};
600
601static const struct opcode_info_t read_iarr[] = {
602 {0, 0x28, 0, F_D_IN | FF_MEDIA_IO, resp_read_dt0, NULL,/* READ(10) */
603 {10, 0xff, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xff, 0xff, 0xc7, 0, 0,
604 0, 0, 0, 0} },
605 {0, 0x8, 0, F_D_IN | FF_MEDIA_IO, resp_read_dt0, NULL, /* READ(6) */
606 {6, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
607 {0, 0xa8, 0, F_D_IN | FF_MEDIA_IO, resp_read_dt0, NULL,/* READ(12) */
608 {12, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xbf,
609 0xc7, 0, 0, 0, 0} },
610};
611
612static const struct opcode_info_t write_iarr[] = {
613 {0, 0x2a, 0, F_D_OUT | FF_MEDIA_IO, resp_write_dt0, /* WRITE(10) */
614 NULL, {10, 0xfb, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xff, 0xff, 0xc7,
615 0, 0, 0, 0, 0, 0} },
616 {0, 0xa, 0, F_D_OUT | FF_MEDIA_IO, resp_write_dt0, /* WRITE(6) */
617 NULL, {6, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0,
618 0, 0, 0} },
619 {0, 0xaa, 0, F_D_OUT | FF_MEDIA_IO, resp_write_dt0, /* WRITE(12) */
620 NULL, {12, 0xfb, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
621 0xbf, 0xc7, 0, 0, 0, 0} },
622};
623
624static const struct opcode_info_t verify_iarr[] = {
625 {0, 0x2f, 0, F_D_OUT_MAYBE | FF_MEDIA_IO, resp_verify,/* VERIFY(10) */
626 NULL, {10, 0xf7, 0xff, 0xff, 0xff, 0xff, 0xbf, 0xff, 0xff, 0xc7,
627 0, 0, 0, 0, 0, 0} },
628};
629
630static const struct opcode_info_t sa_in_16_iarr[] = {
631 {0, 0x9e, 0x12, F_SA_LOW | F_D_IN, resp_get_lba_status, NULL,
632 {16, 0x12, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
633 0xff, 0xff, 0xff, 0, 0xc7} }, /* GET LBA STATUS(16) */
634 {0, 0x9e, 0x16, F_SA_LOW | F_D_IN, resp_get_stream_status, NULL,
635 {16, 0x16, 0, 0, 0xff, 0xff, 0, 0, 0, 0, 0xff, 0xff, 0xff, 0xff,
636 0, 0} }, /* GET STREAM STATUS */
637};
638
639static const struct opcode_info_t vl_iarr[] = { /* VARIABLE LENGTH */
640 {0, 0x7f, 0xb, F_SA_HIGH | F_D_OUT | FF_MEDIA_IO, resp_write_dt0,
641 NULL, {32, 0xc7, 0, 0, 0, 0, 0x3f, 0x18, 0x0, 0xb, 0xfa,
642 0, 0xff, 0xff, 0xff, 0xff} }, /* WRITE(32) */
643 {0, 0x7f, 0x11, F_SA_HIGH | F_D_OUT | FF_MEDIA_IO, resp_write_scat,
644 NULL, {32, 0xc7, 0, 0, 0, 0, 0x3f, 0x18, 0x0, 0x11, 0xf8,
645 0, 0xff, 0xff, 0x0, 0x0} }, /* WRITE SCATTERED(32) */
646};
647
648static const struct opcode_info_t maint_in_iarr[] = { /* MAINT IN */
649 {0, 0xa3, 0xc, F_SA_LOW | F_D_IN, resp_rsup_opcodes, NULL,
650 {12, 0xc, 0x87, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0,
651 0xc7, 0, 0, 0, 0} }, /* REPORT SUPPORTED OPERATION CODES */
652 {0, 0xa3, 0xd, F_SA_LOW | F_D_IN, resp_rsup_tmfs, NULL,
653 {12, 0xd, 0x80, 0, 0, 0, 0xff, 0xff, 0xff, 0xff, 0, 0xc7, 0, 0,
654 0, 0} }, /* REPORTED SUPPORTED TASK MANAGEMENT FUNCTIONS */
655};
656
657static const struct opcode_info_t write_same_iarr[] = {
658 {0, 0x93, 0, F_D_OUT_MAYBE | FF_MEDIA_IO, resp_write_same_16, NULL,
659 {16, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
660 0xff, 0xff, 0xff, 0x3f, 0xc7} }, /* WRITE SAME(16) */
661};
662
663static const struct opcode_info_t reserve_iarr[] = {
664 {0, 0x16, 0, F_D_OUT, NULL, NULL, /* RESERVE(6) */
665 {6, 0x1f, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
666};
667
668static const struct opcode_info_t release_iarr[] = {
669 {0, 0x17, 0, F_D_OUT, NULL, NULL, /* RELEASE(6) */
670 {6, 0x1f, 0xff, 0, 0, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
671};
672
673static const struct opcode_info_t sync_cache_iarr[] = {
674 {0, 0x91, 0, F_SYNC_DELAY | F_M_ACCESS, resp_sync_cache, NULL,
675 {16, 0x6, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
676 0xff, 0xff, 0xff, 0xff, 0x3f, 0xc7} }, /* SYNC_CACHE (16) */
677};
678
679static const struct opcode_info_t pre_fetch_iarr[] = {
680 {0, 0x90, 0, F_SYNC_DELAY | FF_MEDIA_IO, resp_pre_fetch, NULL,
681 {16, 0x2, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
682 0xff, 0xff, 0xff, 0xff, 0x3f, 0xc7} }, /* PRE-FETCH (16) */
683};
684
685static const struct opcode_info_t zone_out_iarr[] = { /* ZONE OUT(16) */
686 {0, 0x94, 0x1, F_SA_LOW | F_M_ACCESS, resp_close_zone, NULL,
687 {16, 0x1, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
688 0xff, 0, 0, 0xff, 0xff, 0x1, 0xc7} }, /* CLOSE ZONE */
689 {0, 0x94, 0x2, F_SA_LOW | F_M_ACCESS, resp_finish_zone, NULL,
690 {16, 0x2, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
691 0xff, 0, 0, 0xff, 0xff, 0x1, 0xc7} }, /* FINISH ZONE */
692 {0, 0x94, 0x4, F_SA_LOW | F_M_ACCESS, resp_rwp_zone, NULL,
693 {16, 0x4, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
694 0xff, 0, 0, 0xff, 0xff, 0x1, 0xc7} }, /* RESET WRITE POINTER */
695};
696
697static const struct opcode_info_t zone_in_iarr[] = { /* ZONE IN(16) */
698 {0, 0x95, 0x6, F_SA_LOW | F_D_IN | F_M_ACCESS, NULL, NULL,
699 {16, 0x6, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
700 0xff, 0xff, 0xff, 0xff, 0x3f, 0xc7} }, /* REPORT ZONES */
701};
702
703
704/* This array is accessed via SDEB_I_* values. Make sure all are mapped,
705 * plus the terminating elements for logic that scans this table such as
706 * REPORT SUPPORTED OPERATION CODES. */
707static const struct opcode_info_t opcode_info_arr[SDEB_I_LAST_ELEM_P1 + 1] = {
708/* 0 */
709 {0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL, /* unknown opcodes */
710 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
711 {0, 0x12, 0, FF_RESPOND | F_D_IN, resp_inquiry, NULL, /* INQUIRY */
712 {6, 0xe3, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
713 {0, 0xa0, 0, FF_RESPOND | F_D_IN, resp_report_luns, NULL,
714 {12, 0xe3, 0xff, 0, 0, 0, 0xff, 0xff, 0xff, 0xff, 0, 0xc7, 0, 0,
715 0, 0} }, /* REPORT LUNS */
716 {0, 0x3, 0, FF_RESPOND | F_D_IN, resp_requests, NULL,
717 {6, 0xe1, 0, 0, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
718 {0, 0x0, 0, F_M_ACCESS | F_RL_WLUN_OK, NULL, NULL,/* TEST UNIT READY */
719 {6, 0, 0, 0, 0, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
720/* 5 */
721 {ARRAY_SIZE(msense_iarr), 0x5a, 0, F_D_IN, /* MODE SENSE(10) */
722 resp_mode_sense, msense_iarr, {10, 0xf8, 0xff, 0xff, 0, 0, 0,
723 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0} },
724 {ARRAY_SIZE(mselect_iarr), 0x55, 0, F_D_OUT, /* MODE SELECT(10) */
725 resp_mode_select, mselect_iarr, {10, 0xf1, 0, 0, 0, 0, 0, 0xff,
726 0xff, 0xc7, 0, 0, 0, 0, 0, 0} },
727 {0, 0x4d, 0, F_D_IN, resp_log_sense, NULL, /* LOG SENSE */
728 {10, 0xe3, 0xff, 0xff, 0, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0,
729 0, 0, 0} },
730 {0, 0x25, 0, F_D_IN, resp_readcap, NULL, /* READ CAPACITY(10) */
731 {10, 0xe1, 0xff, 0xff, 0xff, 0xff, 0, 0, 0x1, 0xc7, 0, 0, 0, 0,
732 0, 0} },
733 {ARRAY_SIZE(read_iarr), 0x88, 0, F_D_IN | FF_MEDIA_IO, /* READ(16) */
734 resp_read_dt0, read_iarr, {16, 0xfe, 0xff, 0xff, 0xff, 0xff,
735 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc7} },
736/* 10 */
737 {ARRAY_SIZE(write_iarr), 0x8a, 0, F_D_OUT | FF_MEDIA_IO,
738 resp_write_dt0, write_iarr, /* WRITE(16) */
739 {16, 0xfa, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
740 0xff, 0xff, 0xff, 0xff, 0xff, 0xc7} },
741 {0, 0x1b, 0, F_SSU_DELAY, resp_start_stop, NULL,/* START STOP UNIT */
742 {6, 0x1, 0, 0xf, 0xf7, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
743 {ARRAY_SIZE(sa_in_16_iarr), 0x9e, 0x10, F_SA_LOW | F_D_IN,
744 resp_readcap16, sa_in_16_iarr, /* SA_IN(16), READ CAPACITY(16) */
745 {16, 0x10, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
746 0xff, 0xff, 0xff, 0xff, 0x1, 0xc7} },
747 {0, 0x9f, 0x12, F_SA_LOW | F_D_OUT | FF_MEDIA_IO, resp_write_scat,
748 NULL, {16, 0x12, 0xf9, 0x0, 0xff, 0xff, 0, 0, 0xff, 0xff, 0xff,
749 0xff, 0xff, 0xff, 0xff, 0xc7} }, /* SA_OUT(16), WRITE SCAT(16) */
750 {ARRAY_SIZE(maint_in_iarr), 0xa3, 0xa, F_SA_LOW | F_D_IN,
751 resp_report_tgtpgs, /* MAINT IN, REPORT TARGET PORT GROUPS */
752 maint_in_iarr, {12, 0xea, 0, 0, 0, 0, 0xff, 0xff, 0xff,
753 0xff, 0, 0xc7, 0, 0, 0, 0} },
754/* 15 */
755 {0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL, /* MAINT OUT */
756 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
757 {ARRAY_SIZE(verify_iarr), 0x8f, 0,
758 F_D_OUT_MAYBE | FF_MEDIA_IO, resp_verify, /* VERIFY(16) */
759 verify_iarr, {16, 0xf6, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
760 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xc7} },
761 {ARRAY_SIZE(vl_iarr), 0x7f, 0x9, F_SA_HIGH | F_D_IN | FF_MEDIA_IO,
762 resp_read_dt0, vl_iarr, /* VARIABLE LENGTH, READ(32) */
763 {32, 0xc7, 0, 0, 0, 0, 0x3f, 0x18, 0x0, 0x9, 0xfe, 0, 0xff, 0xff,
764 0xff, 0xff} },
765 {ARRAY_SIZE(reserve_iarr), 0x56, 0, F_D_OUT,
766 NULL, reserve_iarr, /* RESERVE(10) <no response function> */
767 {10, 0xff, 0xff, 0xff, 0, 0, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0,
768 0} },
769 {ARRAY_SIZE(release_iarr), 0x57, 0, F_D_OUT,
770 NULL, release_iarr, /* RELEASE(10) <no response function> */
771 {10, 0x13, 0xff, 0xff, 0, 0, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0,
772 0} },
773/* 20 */
774 {0, 0x1e, 0, 0, NULL, NULL, /* ALLOW REMOVAL */
775 {6, 0, 0, 0, 0x3, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
776 {0, 0x1, 0, 0, resp_start_stop, NULL, /* REWIND ?? */
777 {6, 0x1, 0, 0, 0, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
778 {0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL, /* ATA_PT */
779 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
780 {0, 0x1d, F_D_OUT, 0, NULL, NULL, /* SEND DIAGNOSTIC */
781 {6, 0xf7, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
782 {0, 0x42, 0, F_D_OUT | FF_MEDIA_IO, resp_unmap, NULL, /* UNMAP */
783 {10, 0x1, 0, 0, 0, 0, 0x3f, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0} },
784/* 25 */
785 {0, 0x3b, 0, F_D_OUT_MAYBE, resp_write_buffer, NULL,
786 {10, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0,
787 0, 0, 0, 0} }, /* WRITE_BUFFER */
788 {ARRAY_SIZE(write_same_iarr), 0x41, 0, F_D_OUT_MAYBE | FF_MEDIA_IO,
789 resp_write_same_10, write_same_iarr, /* WRITE SAME(10) */
790 {10, 0xff, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xff, 0xff, 0xc7, 0,
791 0, 0, 0, 0, 0} },
792 {ARRAY_SIZE(sync_cache_iarr), 0x35, 0, F_SYNC_DELAY | F_M_ACCESS,
793 resp_sync_cache, sync_cache_iarr,
794 {10, 0x7, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xff, 0xff, 0xc7, 0, 0,
795 0, 0, 0, 0} }, /* SYNC_CACHE (10) */
796 {0, 0x89, 0, F_D_OUT | FF_MEDIA_IO, resp_comp_write, NULL,
797 {16, 0xf8, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0, 0,
798 0, 0xff, 0x3f, 0xc7} }, /* COMPARE AND WRITE */
799 {ARRAY_SIZE(pre_fetch_iarr), 0x34, 0, F_SYNC_DELAY | FF_MEDIA_IO,
800 resp_pre_fetch, pre_fetch_iarr,
801 {10, 0x2, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xff, 0xff, 0xc7, 0, 0,
802 0, 0, 0, 0} }, /* PRE-FETCH (10) */
803
804/* 30 */
805 {ARRAY_SIZE(zone_out_iarr), 0x94, 0x3, F_SA_LOW | F_M_ACCESS,
806 resp_open_zone, zone_out_iarr, /* ZONE_OUT(16), OPEN ZONE) */
807 {16, 0x3 /* SA */, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
808 0xff, 0xff, 0x0, 0x0, 0xff, 0xff, 0x1, 0xc7} },
809 {ARRAY_SIZE(zone_in_iarr), 0x95, 0x0, F_SA_LOW | F_M_ACCESS,
810 resp_report_zones, zone_in_iarr, /* ZONE_IN(16), REPORT ZONES) */
811 {16, 0x0 /* SA */, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
812 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xbf, 0xc7} },
813/* 31 */
814 {0, 0x0, 0x0, F_D_OUT | FF_MEDIA_IO,
815 resp_atomic_write, NULL, /* ATOMIC WRITE 16 */
816 {16, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
817 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff} },
818/* sentinel */
819 {0xff, 0, 0, 0, NULL, NULL, /* terminating element */
820 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
821};
822
823static int sdebug_num_hosts;
824static int sdebug_add_host = DEF_NUM_HOST; /* in sysfs this is relative */
825static int sdebug_ato = DEF_ATO;
826static int sdebug_cdb_len = DEF_CDB_LEN;
827static int sdebug_jdelay = DEF_JDELAY; /* if > 0 then unit is jiffies */
828static int sdebug_dev_size_mb = DEF_DEV_SIZE_PRE_INIT;
829static int sdebug_dif = DEF_DIF;
830static int sdebug_dix = DEF_DIX;
831static int sdebug_dsense = DEF_D_SENSE;
832static int sdebug_every_nth = DEF_EVERY_NTH;
833static int sdebug_fake_rw = DEF_FAKE_RW;
834static unsigned int sdebug_guard = DEF_GUARD;
835static int sdebug_host_max_queue; /* per host */
836static int sdebug_lowest_aligned = DEF_LOWEST_ALIGNED;
837static int sdebug_max_luns = DEF_MAX_LUNS;
838static int sdebug_max_queue = SDEBUG_CANQUEUE; /* per submit queue */
839static unsigned int sdebug_medium_error_start = OPT_MEDIUM_ERR_ADDR;
840static int sdebug_medium_error_count = OPT_MEDIUM_ERR_NUM;
841static int sdebug_ndelay = DEF_NDELAY; /* if > 0 then unit is nanoseconds */
842static int sdebug_no_lun_0 = DEF_NO_LUN_0;
843static int sdebug_no_uld;
844static int sdebug_num_parts = DEF_NUM_PARTS;
845static int sdebug_num_tgts = DEF_NUM_TGTS; /* targets per host */
846static int sdebug_opt_blks = DEF_OPT_BLKS;
847static int sdebug_opts = DEF_OPTS;
848static int sdebug_physblk_exp = DEF_PHYSBLK_EXP;
849static int sdebug_opt_xferlen_exp = DEF_OPT_XFERLEN_EXP;
850static int sdebug_ptype = DEF_PTYPE; /* SCSI peripheral device type */
851static int sdebug_scsi_level = DEF_SCSI_LEVEL;
852static int sdebug_sector_size = DEF_SECTOR_SIZE;
853static int sdeb_tur_ms_to_ready = DEF_TUR_MS_TO_READY;
854static int sdebug_virtual_gb = DEF_VIRTUAL_GB;
855static int sdebug_vpd_use_hostno = DEF_VPD_USE_HOSTNO;
856static unsigned int sdebug_lbpu = DEF_LBPU;
857static unsigned int sdebug_lbpws = DEF_LBPWS;
858static unsigned int sdebug_lbpws10 = DEF_LBPWS10;
859static unsigned int sdebug_lbprz = DEF_LBPRZ;
860static unsigned int sdebug_unmap_alignment = DEF_UNMAP_ALIGNMENT;
861static unsigned int sdebug_unmap_granularity = DEF_UNMAP_GRANULARITY;
862static unsigned int sdebug_unmap_max_blocks = DEF_UNMAP_MAX_BLOCKS;
863static unsigned int sdebug_unmap_max_desc = DEF_UNMAP_MAX_DESC;
864static unsigned int sdebug_write_same_length = DEF_WRITESAME_LENGTH;
865static unsigned int sdebug_atomic_wr = DEF_ATOMIC_WR;
866static unsigned int sdebug_atomic_wr_max_length = DEF_ATOMIC_WR_MAX_LENGTH;
867static unsigned int sdebug_atomic_wr_align = DEF_ATOMIC_WR_ALIGN;
868static unsigned int sdebug_atomic_wr_gran = DEF_ATOMIC_WR_GRAN;
869static unsigned int sdebug_atomic_wr_max_length_bndry =
870 DEF_ATOMIC_WR_MAX_LENGTH_BNDRY;
871static unsigned int sdebug_atomic_wr_max_bndry = DEF_ATOMIC_WR_MAX_BNDRY;
872static int sdebug_uuid_ctl = DEF_UUID_CTL;
873static bool sdebug_random = DEF_RANDOM;
874static bool sdebug_per_host_store = DEF_PER_HOST_STORE;
875static bool sdebug_removable = DEF_REMOVABLE;
876static bool sdebug_clustering;
877static bool sdebug_host_lock = DEF_HOST_LOCK;
878static bool sdebug_strict = DEF_STRICT;
879static bool sdebug_any_injecting_opt;
880static bool sdebug_no_rwlock;
881static bool sdebug_verbose;
882static bool have_dif_prot;
883static bool write_since_sync;
884static bool sdebug_statistics = DEF_STATISTICS;
885static bool sdebug_wp;
886static bool sdebug_allow_restart;
887static enum {
888 BLK_ZONED_NONE = 0,
889 BLK_ZONED_HA = 1,
890 BLK_ZONED_HM = 2,
891} sdeb_zbc_model = BLK_ZONED_NONE;
892static char *sdeb_zbc_model_s;
893
894enum sam_lun_addr_method {SAM_LUN_AM_PERIPHERAL = 0x0,
895 SAM_LUN_AM_FLAT = 0x1,
896 SAM_LUN_AM_LOGICAL_UNIT = 0x2,
897 SAM_LUN_AM_EXTENDED = 0x3};
898static enum sam_lun_addr_method sdebug_lun_am = SAM_LUN_AM_PERIPHERAL;
899static int sdebug_lun_am_i = (int)SAM_LUN_AM_PERIPHERAL;
900
901static unsigned int sdebug_store_sectors;
902static sector_t sdebug_capacity; /* in sectors */
903
904/* old BIOS stuff, kernel may get rid of them but some mode sense pages
905 may still need them */
906static int sdebug_heads; /* heads per disk */
907static int sdebug_cylinders_per; /* cylinders per surface */
908static int sdebug_sectors_per; /* sectors per cylinder */
909
910static LIST_HEAD(sdebug_host_list);
911static DEFINE_MUTEX(sdebug_host_list_mutex);
912
913static struct xarray per_store_arr;
914static struct xarray *per_store_ap = &per_store_arr;
915static int sdeb_first_idx = -1; /* invalid index ==> none created */
916static int sdeb_most_recent_idx = -1;
917static DEFINE_RWLOCK(sdeb_fake_rw_lck); /* need a RW lock when fake_rw=1 */
918
919static unsigned long map_size;
920static int num_aborts;
921static int num_dev_resets;
922static int num_target_resets;
923static int num_bus_resets;
924static int num_host_resets;
925static int dix_writes;
926static int dix_reads;
927static int dif_errors;
928
929/* ZBC global data */
930static bool sdeb_zbc_in_use; /* true for host-aware and host-managed disks */
931static int sdeb_zbc_zone_cap_mb;
932static int sdeb_zbc_zone_size_mb;
933static int sdeb_zbc_max_open = DEF_ZBC_MAX_OPEN_ZONES;
934static int sdeb_zbc_nr_conv = DEF_ZBC_NR_CONV_ZONES;
935
936static int submit_queues = DEF_SUBMIT_QUEUES; /* > 1 for multi-queue (mq) */
937static int poll_queues; /* iouring iopoll interface.*/
938
939static atomic_long_t writes_by_group_number[64];
940
941static char sdebug_proc_name[] = MY_NAME;
942static const char *my_name = MY_NAME;
943
944static const struct bus_type pseudo_lld_bus;
945
946static struct device_driver sdebug_driverfs_driver = {
947 .name = sdebug_proc_name,
948 .bus = &pseudo_lld_bus,
949};
950
951static const int check_condition_result =
952 SAM_STAT_CHECK_CONDITION;
953
954static const int illegal_condition_result =
955 (DID_ABORT << 16) | SAM_STAT_CHECK_CONDITION;
956
957static const int device_qfull_result =
958 (DID_ABORT << 16) | SAM_STAT_TASK_SET_FULL;
959
960static const int condition_met_result = SAM_STAT_CONDITION_MET;
961
962static struct dentry *sdebug_debugfs_root;
963static ASYNC_DOMAIN_EXCLUSIVE(sdebug_async_domain);
964
965static void sdebug_err_free(struct rcu_head *head)
966{
967 struct sdebug_err_inject *inject =
968 container_of(head, typeof(*inject), rcu);
969
970 kfree(inject);
971}
972
973static void sdebug_err_add(struct scsi_device *sdev, struct sdebug_err_inject *new)
974{
975 struct sdebug_dev_info *devip = (struct sdebug_dev_info *)sdev->hostdata;
976 struct sdebug_err_inject *err;
977
978 spin_lock(&devip->list_lock);
979 list_for_each_entry_rcu(err, &devip->inject_err_list, list) {
980 if (err->type == new->type && err->cmd == new->cmd) {
981 list_del_rcu(&err->list);
982 call_rcu(&err->rcu, sdebug_err_free);
983 }
984 }
985
986 list_add_tail_rcu(&new->list, &devip->inject_err_list);
987 spin_unlock(&devip->list_lock);
988}
989
990static int sdebug_err_remove(struct scsi_device *sdev, const char *buf, size_t count)
991{
992 struct sdebug_dev_info *devip = (struct sdebug_dev_info *)sdev->hostdata;
993 struct sdebug_err_inject *err;
994 int type;
995 unsigned char cmd;
996
997 if (sscanf(buf, "- %d %hhx", &type, &cmd) != 2) {
998 kfree(buf);
999 return -EINVAL;
1000 }
1001
1002 spin_lock(&devip->list_lock);
1003 list_for_each_entry_rcu(err, &devip->inject_err_list, list) {
1004 if (err->type == type && err->cmd == cmd) {
1005 list_del_rcu(&err->list);
1006 call_rcu(&err->rcu, sdebug_err_free);
1007 spin_unlock(&devip->list_lock);
1008 kfree(buf);
1009 return count;
1010 }
1011 }
1012 spin_unlock(&devip->list_lock);
1013
1014 kfree(buf);
1015 return -EINVAL;
1016}
1017
1018static int sdebug_error_show(struct seq_file *m, void *p)
1019{
1020 struct scsi_device *sdev = (struct scsi_device *)m->private;
1021 struct sdebug_dev_info *devip = (struct sdebug_dev_info *)sdev->hostdata;
1022 struct sdebug_err_inject *err;
1023
1024 seq_puts(m, "Type\tCount\tCommand\n");
1025
1026 rcu_read_lock();
1027 list_for_each_entry_rcu(err, &devip->inject_err_list, list) {
1028 switch (err->type) {
1029 case ERR_TMOUT_CMD:
1030 case ERR_ABORT_CMD_FAILED:
1031 case ERR_LUN_RESET_FAILED:
1032 seq_printf(m, "%d\t%d\t0x%x\n", err->type, err->cnt,
1033 err->cmd);
1034 break;
1035
1036 case ERR_FAIL_QUEUE_CMD:
1037 seq_printf(m, "%d\t%d\t0x%x\t0x%x\n", err->type,
1038 err->cnt, err->cmd, err->queuecmd_ret);
1039 break;
1040
1041 case ERR_FAIL_CMD:
1042 seq_printf(m, "%d\t%d\t0x%x\t0x%x 0x%x 0x%x 0x%x 0x%x 0x%x\n",
1043 err->type, err->cnt, err->cmd,
1044 err->host_byte, err->driver_byte,
1045 err->status_byte, err->sense_key,
1046 err->asc, err->asq);
1047 break;
1048 }
1049 }
1050 rcu_read_unlock();
1051
1052 return 0;
1053}
1054
1055static int sdebug_error_open(struct inode *inode, struct file *file)
1056{
1057 return single_open(file, sdebug_error_show, inode->i_private);
1058}
1059
1060static ssize_t sdebug_error_write(struct file *file, const char __user *ubuf,
1061 size_t count, loff_t *ppos)
1062{
1063 char *buf;
1064 unsigned int inject_type;
1065 struct sdebug_err_inject *inject;
1066 struct scsi_device *sdev = (struct scsi_device *)file->f_inode->i_private;
1067
1068 buf = kzalloc(count + 1, GFP_KERNEL);
1069 if (!buf)
1070 return -ENOMEM;
1071
1072 if (copy_from_user(buf, ubuf, count)) {
1073 kfree(buf);
1074 return -EFAULT;
1075 }
1076
1077 if (buf[0] == '-')
1078 return sdebug_err_remove(sdev, buf, count);
1079
1080 if (sscanf(buf, "%d", &inject_type) != 1) {
1081 kfree(buf);
1082 return -EINVAL;
1083 }
1084
1085 inject = kzalloc(sizeof(struct sdebug_err_inject), GFP_KERNEL);
1086 if (!inject) {
1087 kfree(buf);
1088 return -ENOMEM;
1089 }
1090
1091 switch (inject_type) {
1092 case ERR_TMOUT_CMD:
1093 case ERR_ABORT_CMD_FAILED:
1094 case ERR_LUN_RESET_FAILED:
1095 if (sscanf(buf, "%d %d %hhx", &inject->type, &inject->cnt,
1096 &inject->cmd) != 3)
1097 goto out_error;
1098 break;
1099
1100 case ERR_FAIL_QUEUE_CMD:
1101 if (sscanf(buf, "%d %d %hhx %x", &inject->type, &inject->cnt,
1102 &inject->cmd, &inject->queuecmd_ret) != 4)
1103 goto out_error;
1104 break;
1105
1106 case ERR_FAIL_CMD:
1107 if (sscanf(buf, "%d %d %hhx %hhx %hhx %hhx %hhx %hhx %hhx",
1108 &inject->type, &inject->cnt, &inject->cmd,
1109 &inject->host_byte, &inject->driver_byte,
1110 &inject->status_byte, &inject->sense_key,
1111 &inject->asc, &inject->asq) != 9)
1112 goto out_error;
1113 break;
1114
1115 default:
1116 goto out_error;
1117 break;
1118 }
1119
1120 kfree(buf);
1121 sdebug_err_add(sdev, inject);
1122
1123 return count;
1124
1125out_error:
1126 kfree(buf);
1127 kfree(inject);
1128 return -EINVAL;
1129}
1130
1131static const struct file_operations sdebug_error_fops = {
1132 .open = sdebug_error_open,
1133 .read = seq_read,
1134 .write = sdebug_error_write,
1135 .release = single_release,
1136};
1137
1138static int sdebug_target_reset_fail_show(struct seq_file *m, void *p)
1139{
1140 struct scsi_target *starget = (struct scsi_target *)m->private;
1141 struct sdebug_target_info *targetip =
1142 (struct sdebug_target_info *)starget->hostdata;
1143
1144 if (targetip)
1145 seq_printf(m, "%c\n", targetip->reset_fail ? 'Y' : 'N');
1146
1147 return 0;
1148}
1149
1150static int sdebug_target_reset_fail_open(struct inode *inode, struct file *file)
1151{
1152 return single_open(file, sdebug_target_reset_fail_show, inode->i_private);
1153}
1154
1155static ssize_t sdebug_target_reset_fail_write(struct file *file,
1156 const char __user *ubuf, size_t count, loff_t *ppos)
1157{
1158 int ret;
1159 struct scsi_target *starget =
1160 (struct scsi_target *)file->f_inode->i_private;
1161 struct sdebug_target_info *targetip =
1162 (struct sdebug_target_info *)starget->hostdata;
1163
1164 if (targetip) {
1165 ret = kstrtobool_from_user(ubuf, count, &targetip->reset_fail);
1166 return ret < 0 ? ret : count;
1167 }
1168 return -ENODEV;
1169}
1170
1171static const struct file_operations sdebug_target_reset_fail_fops = {
1172 .open = sdebug_target_reset_fail_open,
1173 .read = seq_read,
1174 .write = sdebug_target_reset_fail_write,
1175 .release = single_release,
1176};
1177
1178static int sdebug_target_alloc(struct scsi_target *starget)
1179{
1180 struct sdebug_target_info *targetip;
1181
1182 targetip = kzalloc(sizeof(struct sdebug_target_info), GFP_KERNEL);
1183 if (!targetip)
1184 return -ENOMEM;
1185
1186 async_synchronize_full_domain(&sdebug_async_domain);
1187
1188 targetip->debugfs_entry = debugfs_create_dir(dev_name(&starget->dev),
1189 sdebug_debugfs_root);
1190
1191 debugfs_create_file("fail_reset", 0600, targetip->debugfs_entry, starget,
1192 &sdebug_target_reset_fail_fops);
1193
1194 starget->hostdata = targetip;
1195
1196 return 0;
1197}
1198
1199static void sdebug_tartget_cleanup_async(void *data, async_cookie_t cookie)
1200{
1201 struct sdebug_target_info *targetip = data;
1202
1203 debugfs_remove(targetip->debugfs_entry);
1204 kfree(targetip);
1205}
1206
1207static void sdebug_target_destroy(struct scsi_target *starget)
1208{
1209 struct sdebug_target_info *targetip;
1210
1211 targetip = (struct sdebug_target_info *)starget->hostdata;
1212 if (targetip) {
1213 starget->hostdata = NULL;
1214 async_schedule_domain(sdebug_tartget_cleanup_async, targetip,
1215 &sdebug_async_domain);
1216 }
1217}
1218
1219/* Only do the extra work involved in logical block provisioning if one or
1220 * more of the lbpu, lbpws or lbpws10 parameters are given and we are doing
1221 * real reads and writes (i.e. not skipping them for speed).
1222 */
1223static inline bool scsi_debug_lbp(void)
1224{
1225 return 0 == sdebug_fake_rw &&
1226 (sdebug_lbpu || sdebug_lbpws || sdebug_lbpws10);
1227}
1228
1229static inline bool scsi_debug_atomic_write(void)
1230{
1231 return sdebug_fake_rw == 0 && sdebug_atomic_wr;
1232}
1233
1234static void *lba2fake_store(struct sdeb_store_info *sip,
1235 unsigned long long lba)
1236{
1237 struct sdeb_store_info *lsip = sip;
1238
1239 lba = do_div(lba, sdebug_store_sectors);
1240 if (!sip || !sip->storep) {
1241 WARN_ON_ONCE(true);
1242 lsip = xa_load(per_store_ap, 0); /* should never be NULL */
1243 }
1244 return lsip->storep + lba * sdebug_sector_size;
1245}
1246
1247static struct t10_pi_tuple *dif_store(struct sdeb_store_info *sip,
1248 sector_t sector)
1249{
1250 sector = sector_div(sector, sdebug_store_sectors);
1251
1252 return sip->dif_storep + sector;
1253}
1254
1255static void sdebug_max_tgts_luns(void)
1256{
1257 struct sdebug_host_info *sdbg_host;
1258 struct Scsi_Host *hpnt;
1259
1260 mutex_lock(&sdebug_host_list_mutex);
1261 list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) {
1262 hpnt = sdbg_host->shost;
1263 if ((hpnt->this_id >= 0) &&
1264 (sdebug_num_tgts > hpnt->this_id))
1265 hpnt->max_id = sdebug_num_tgts + 1;
1266 else
1267 hpnt->max_id = sdebug_num_tgts;
1268 /* sdebug_max_luns; */
1269 hpnt->max_lun = SCSI_W_LUN_REPORT_LUNS + 1;
1270 }
1271 mutex_unlock(&sdebug_host_list_mutex);
1272}
1273
1274enum sdeb_cmd_data {SDEB_IN_DATA = 0, SDEB_IN_CDB = 1};
1275
1276/* Set in_bit to -1 to indicate no bit position of invalid field */
1277static void mk_sense_invalid_fld(struct scsi_cmnd *scp,
1278 enum sdeb_cmd_data c_d,
1279 int in_byte, int in_bit)
1280{
1281 unsigned char *sbuff;
1282 u8 sks[4];
1283 int sl, asc;
1284
1285 sbuff = scp->sense_buffer;
1286 if (!sbuff) {
1287 sdev_printk(KERN_ERR, scp->device,
1288 "%s: sense_buffer is NULL\n", __func__);
1289 return;
1290 }
1291 asc = c_d ? INVALID_FIELD_IN_CDB : INVALID_FIELD_IN_PARAM_LIST;
1292 memset(sbuff, 0, SCSI_SENSE_BUFFERSIZE);
1293 scsi_build_sense(scp, sdebug_dsense, ILLEGAL_REQUEST, asc, 0);
1294 memset(sks, 0, sizeof(sks));
1295 sks[0] = 0x80;
1296 if (c_d)
1297 sks[0] |= 0x40;
1298 if (in_bit >= 0) {
1299 sks[0] |= 0x8;
1300 sks[0] |= 0x7 & in_bit;
1301 }
1302 put_unaligned_be16(in_byte, sks + 1);
1303 if (sdebug_dsense) {
1304 sl = sbuff[7] + 8;
1305 sbuff[7] = sl;
1306 sbuff[sl] = 0x2;
1307 sbuff[sl + 1] = 0x6;
1308 memcpy(sbuff + sl + 4, sks, 3);
1309 } else
1310 memcpy(sbuff + 15, sks, 3);
1311 if (sdebug_verbose)
1312 sdev_printk(KERN_INFO, scp->device, "%s: [sense_key,asc,ascq"
1313 "]: [0x5,0x%x,0x0] %c byte=%d, bit=%d\n",
1314 my_name, asc, c_d ? 'C' : 'D', in_byte, in_bit);
1315}
1316
1317static void mk_sense_buffer(struct scsi_cmnd *scp, int key, int asc, int asq)
1318{
1319 if (!scp->sense_buffer) {
1320 sdev_printk(KERN_ERR, scp->device,
1321 "%s: sense_buffer is NULL\n", __func__);
1322 return;
1323 }
1324 memset(scp->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
1325
1326 scsi_build_sense(scp, sdebug_dsense, key, asc, asq);
1327
1328 if (sdebug_verbose)
1329 sdev_printk(KERN_INFO, scp->device,
1330 "%s: [sense_key,asc,ascq]: [0x%x,0x%x,0x%x]\n",
1331 my_name, key, asc, asq);
1332}
1333
1334static void mk_sense_invalid_opcode(struct scsi_cmnd *scp)
1335{
1336 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_OPCODE, 0);
1337}
1338
1339static int scsi_debug_ioctl(struct scsi_device *dev, unsigned int cmd,
1340 void __user *arg)
1341{
1342 if (sdebug_verbose) {
1343 if (0x1261 == cmd)
1344 sdev_printk(KERN_INFO, dev,
1345 "%s: BLKFLSBUF [0x1261]\n", __func__);
1346 else if (0x5331 == cmd)
1347 sdev_printk(KERN_INFO, dev,
1348 "%s: CDROM_GET_CAPABILITY [0x5331]\n",
1349 __func__);
1350 else
1351 sdev_printk(KERN_INFO, dev, "%s: cmd=0x%x\n",
1352 __func__, cmd);
1353 }
1354 return -EINVAL;
1355 /* return -ENOTTY; // correct return but upsets fdisk */
1356}
1357
1358static void config_cdb_len(struct scsi_device *sdev)
1359{
1360 switch (sdebug_cdb_len) {
1361 case 6: /* suggest 6 byte READ, WRITE and MODE SENSE/SELECT */
1362 sdev->use_10_for_rw = false;
1363 sdev->use_16_for_rw = false;
1364 sdev->use_10_for_ms = false;
1365 break;
1366 case 10: /* suggest 10 byte RWs and 6 byte MODE SENSE/SELECT */
1367 sdev->use_10_for_rw = true;
1368 sdev->use_16_for_rw = false;
1369 sdev->use_10_for_ms = false;
1370 break;
1371 case 12: /* suggest 10 byte RWs and 10 byte MODE SENSE/SELECT */
1372 sdev->use_10_for_rw = true;
1373 sdev->use_16_for_rw = false;
1374 sdev->use_10_for_ms = true;
1375 break;
1376 case 16:
1377 sdev->use_10_for_rw = false;
1378 sdev->use_16_for_rw = true;
1379 sdev->use_10_for_ms = true;
1380 break;
1381 case 32: /* No knobs to suggest this so same as 16 for now */
1382 sdev->use_10_for_rw = false;
1383 sdev->use_16_for_rw = true;
1384 sdev->use_10_for_ms = true;
1385 break;
1386 default:
1387 pr_warn("unexpected cdb_len=%d, force to 10\n",
1388 sdebug_cdb_len);
1389 sdev->use_10_for_rw = true;
1390 sdev->use_16_for_rw = false;
1391 sdev->use_10_for_ms = false;
1392 sdebug_cdb_len = 10;
1393 break;
1394 }
1395}
1396
1397static void all_config_cdb_len(void)
1398{
1399 struct sdebug_host_info *sdbg_host;
1400 struct Scsi_Host *shost;
1401 struct scsi_device *sdev;
1402
1403 mutex_lock(&sdebug_host_list_mutex);
1404 list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) {
1405 shost = sdbg_host->shost;
1406 shost_for_each_device(sdev, shost) {
1407 config_cdb_len(sdev);
1408 }
1409 }
1410 mutex_unlock(&sdebug_host_list_mutex);
1411}
1412
1413static void clear_luns_changed_on_target(struct sdebug_dev_info *devip)
1414{
1415 struct sdebug_host_info *sdhp = devip->sdbg_host;
1416 struct sdebug_dev_info *dp;
1417
1418 list_for_each_entry(dp, &sdhp->dev_info_list, dev_list) {
1419 if ((devip->sdbg_host == dp->sdbg_host) &&
1420 (devip->target == dp->target)) {
1421 clear_bit(SDEBUG_UA_LUNS_CHANGED, dp->uas_bm);
1422 }
1423 }
1424}
1425
1426static int make_ua(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
1427{
1428 int k;
1429
1430 k = find_first_bit(devip->uas_bm, SDEBUG_NUM_UAS);
1431 if (k != SDEBUG_NUM_UAS) {
1432 const char *cp = NULL;
1433
1434 switch (k) {
1435 case SDEBUG_UA_POR:
1436 mk_sense_buffer(scp, UNIT_ATTENTION, UA_RESET_ASC,
1437 POWER_ON_RESET_ASCQ);
1438 if (sdebug_verbose)
1439 cp = "power on reset";
1440 break;
1441 case SDEBUG_UA_POOCCUR:
1442 mk_sense_buffer(scp, UNIT_ATTENTION, UA_RESET_ASC,
1443 POWER_ON_OCCURRED_ASCQ);
1444 if (sdebug_verbose)
1445 cp = "power on occurred";
1446 break;
1447 case SDEBUG_UA_BUS_RESET:
1448 mk_sense_buffer(scp, UNIT_ATTENTION, UA_RESET_ASC,
1449 BUS_RESET_ASCQ);
1450 if (sdebug_verbose)
1451 cp = "bus reset";
1452 break;
1453 case SDEBUG_UA_MODE_CHANGED:
1454 mk_sense_buffer(scp, UNIT_ATTENTION, UA_CHANGED_ASC,
1455 MODE_CHANGED_ASCQ);
1456 if (sdebug_verbose)
1457 cp = "mode parameters changed";
1458 break;
1459 case SDEBUG_UA_CAPACITY_CHANGED:
1460 mk_sense_buffer(scp, UNIT_ATTENTION, UA_CHANGED_ASC,
1461 CAPACITY_CHANGED_ASCQ);
1462 if (sdebug_verbose)
1463 cp = "capacity data changed";
1464 break;
1465 case SDEBUG_UA_MICROCODE_CHANGED:
1466 mk_sense_buffer(scp, UNIT_ATTENTION,
1467 TARGET_CHANGED_ASC,
1468 MICROCODE_CHANGED_ASCQ);
1469 if (sdebug_verbose)
1470 cp = "microcode has been changed";
1471 break;
1472 case SDEBUG_UA_MICROCODE_CHANGED_WO_RESET:
1473 mk_sense_buffer(scp, UNIT_ATTENTION,
1474 TARGET_CHANGED_ASC,
1475 MICROCODE_CHANGED_WO_RESET_ASCQ);
1476 if (sdebug_verbose)
1477 cp = "microcode has been changed without reset";
1478 break;
1479 case SDEBUG_UA_LUNS_CHANGED:
1480 /*
1481 * SPC-3 behavior is to report a UNIT ATTENTION with
1482 * ASC/ASCQ REPORTED LUNS DATA HAS CHANGED on every LUN
1483 * on the target, until a REPORT LUNS command is
1484 * received. SPC-4 behavior is to report it only once.
1485 * NOTE: sdebug_scsi_level does not use the same
1486 * values as struct scsi_device->scsi_level.
1487 */
1488 if (sdebug_scsi_level >= 6) /* SPC-4 and above */
1489 clear_luns_changed_on_target(devip);
1490 mk_sense_buffer(scp, UNIT_ATTENTION,
1491 TARGET_CHANGED_ASC,
1492 LUNS_CHANGED_ASCQ);
1493 if (sdebug_verbose)
1494 cp = "reported luns data has changed";
1495 break;
1496 default:
1497 pr_warn("unexpected unit attention code=%d\n", k);
1498 if (sdebug_verbose)
1499 cp = "unknown";
1500 break;
1501 }
1502 clear_bit(k, devip->uas_bm);
1503 if (sdebug_verbose)
1504 sdev_printk(KERN_INFO, scp->device,
1505 "%s reports: Unit attention: %s\n",
1506 my_name, cp);
1507 return check_condition_result;
1508 }
1509 return 0;
1510}
1511
1512/* Build SCSI "data-in" buffer. Returns 0 if ok else (DID_ERROR << 16). */
1513static int fill_from_dev_buffer(struct scsi_cmnd *scp, unsigned char *arr,
1514 int arr_len)
1515{
1516 int act_len;
1517 struct scsi_data_buffer *sdb = &scp->sdb;
1518
1519 if (!sdb->length)
1520 return 0;
1521 if (scp->sc_data_direction != DMA_FROM_DEVICE)
1522 return DID_ERROR << 16;
1523
1524 act_len = sg_copy_from_buffer(sdb->table.sgl, sdb->table.nents,
1525 arr, arr_len);
1526 scsi_set_resid(scp, scsi_bufflen(scp) - act_len);
1527
1528 return 0;
1529}
1530
1531/* Partial build of SCSI "data-in" buffer. Returns 0 if ok else
1532 * (DID_ERROR << 16). Can write to offset in data-in buffer. If multiple
1533 * calls, not required to write in ascending offset order. Assumes resid
1534 * set to scsi_bufflen() prior to any calls.
1535 */
1536static int p_fill_from_dev_buffer(struct scsi_cmnd *scp, const void *arr,
1537 int arr_len, unsigned int off_dst)
1538{
1539 unsigned int act_len, n;
1540 struct scsi_data_buffer *sdb = &scp->sdb;
1541 off_t skip = off_dst;
1542
1543 if (sdb->length <= off_dst)
1544 return 0;
1545 if (scp->sc_data_direction != DMA_FROM_DEVICE)
1546 return DID_ERROR << 16;
1547
1548 act_len = sg_pcopy_from_buffer(sdb->table.sgl, sdb->table.nents,
1549 arr, arr_len, skip);
1550 pr_debug("%s: off_dst=%u, scsi_bufflen=%u, act_len=%u, resid=%d\n",
1551 __func__, off_dst, scsi_bufflen(scp), act_len,
1552 scsi_get_resid(scp));
1553 n = scsi_bufflen(scp) - (off_dst + act_len);
1554 scsi_set_resid(scp, min_t(u32, scsi_get_resid(scp), n));
1555 return 0;
1556}
1557
1558/* Fetches from SCSI "data-out" buffer. Returns number of bytes fetched into
1559 * 'arr' or -1 if error.
1560 */
1561static int fetch_to_dev_buffer(struct scsi_cmnd *scp, unsigned char *arr,
1562 int arr_len)
1563{
1564 if (!scsi_bufflen(scp))
1565 return 0;
1566 if (scp->sc_data_direction != DMA_TO_DEVICE)
1567 return -1;
1568
1569 return scsi_sg_copy_to_buffer(scp, arr, arr_len);
1570}
1571
1572
1573static char sdebug_inq_vendor_id[9] = "Linux ";
1574static char sdebug_inq_product_id[17] = "scsi_debug ";
1575static char sdebug_inq_product_rev[5] = SDEBUG_VERSION;
1576/* Use some locally assigned NAAs for SAS addresses. */
1577static const u64 naa3_comp_a = 0x3222222000000000ULL;
1578static const u64 naa3_comp_b = 0x3333333000000000ULL;
1579static const u64 naa3_comp_c = 0x3111111000000000ULL;
1580
1581/* Device identification VPD page. Returns number of bytes placed in arr */
1582static int inquiry_vpd_83(unsigned char *arr, int port_group_id,
1583 int target_dev_id, int dev_id_num,
1584 const char *dev_id_str, int dev_id_str_len,
1585 const uuid_t *lu_name)
1586{
1587 int num, port_a;
1588 char b[32];
1589
1590 port_a = target_dev_id + 1;
1591 /* T10 vendor identifier field format (faked) */
1592 arr[0] = 0x2; /* ASCII */
1593 arr[1] = 0x1;
1594 arr[2] = 0x0;
1595 memcpy(&arr[4], sdebug_inq_vendor_id, 8);
1596 memcpy(&arr[12], sdebug_inq_product_id, 16);
1597 memcpy(&arr[28], dev_id_str, dev_id_str_len);
1598 num = 8 + 16 + dev_id_str_len;
1599 arr[3] = num;
1600 num += 4;
1601 if (dev_id_num >= 0) {
1602 if (sdebug_uuid_ctl) {
1603 /* Locally assigned UUID */
1604 arr[num++] = 0x1; /* binary (not necessarily sas) */
1605 arr[num++] = 0xa; /* PIV=0, lu, naa */
1606 arr[num++] = 0x0;
1607 arr[num++] = 0x12;
1608 arr[num++] = 0x10; /* uuid type=1, locally assigned */
1609 arr[num++] = 0x0;
1610 memcpy(arr + num, lu_name, 16);
1611 num += 16;
1612 } else {
1613 /* NAA-3, Logical unit identifier (binary) */
1614 arr[num++] = 0x1; /* binary (not necessarily sas) */
1615 arr[num++] = 0x3; /* PIV=0, lu, naa */
1616 arr[num++] = 0x0;
1617 arr[num++] = 0x8;
1618 put_unaligned_be64(naa3_comp_b + dev_id_num, arr + num);
1619 num += 8;
1620 }
1621 /* Target relative port number */
1622 arr[num++] = 0x61; /* proto=sas, binary */
1623 arr[num++] = 0x94; /* PIV=1, target port, rel port */
1624 arr[num++] = 0x0; /* reserved */
1625 arr[num++] = 0x4; /* length */
1626 arr[num++] = 0x0; /* reserved */
1627 arr[num++] = 0x0; /* reserved */
1628 arr[num++] = 0x0;
1629 arr[num++] = 0x1; /* relative port A */
1630 }
1631 /* NAA-3, Target port identifier */
1632 arr[num++] = 0x61; /* proto=sas, binary */
1633 arr[num++] = 0x93; /* piv=1, target port, naa */
1634 arr[num++] = 0x0;
1635 arr[num++] = 0x8;
1636 put_unaligned_be64(naa3_comp_a + port_a, arr + num);
1637 num += 8;
1638 /* NAA-3, Target port group identifier */
1639 arr[num++] = 0x61; /* proto=sas, binary */
1640 arr[num++] = 0x95; /* piv=1, target port group id */
1641 arr[num++] = 0x0;
1642 arr[num++] = 0x4;
1643 arr[num++] = 0;
1644 arr[num++] = 0;
1645 put_unaligned_be16(port_group_id, arr + num);
1646 num += 2;
1647 /* NAA-3, Target device identifier */
1648 arr[num++] = 0x61; /* proto=sas, binary */
1649 arr[num++] = 0xa3; /* piv=1, target device, naa */
1650 arr[num++] = 0x0;
1651 arr[num++] = 0x8;
1652 put_unaligned_be64(naa3_comp_a + target_dev_id, arr + num);
1653 num += 8;
1654 /* SCSI name string: Target device identifier */
1655 arr[num++] = 0x63; /* proto=sas, UTF-8 */
1656 arr[num++] = 0xa8; /* piv=1, target device, SCSI name string */
1657 arr[num++] = 0x0;
1658 arr[num++] = 24;
1659 memcpy(arr + num, "naa.32222220", 12);
1660 num += 12;
1661 snprintf(b, sizeof(b), "%08X", target_dev_id);
1662 memcpy(arr + num, b, 8);
1663 num += 8;
1664 memset(arr + num, 0, 4);
1665 num += 4;
1666 return num;
1667}
1668
1669static unsigned char vpd84_data[] = {
1670/* from 4th byte */ 0x22,0x22,0x22,0x0,0xbb,0x0,
1671 0x22,0x22,0x22,0x0,0xbb,0x1,
1672 0x22,0x22,0x22,0x0,0xbb,0x2,
1673};
1674
1675/* Software interface identification VPD page */
1676static int inquiry_vpd_84(unsigned char *arr)
1677{
1678 memcpy(arr, vpd84_data, sizeof(vpd84_data));
1679 return sizeof(vpd84_data);
1680}
1681
1682/* Management network addresses VPD page */
1683static int inquiry_vpd_85(unsigned char *arr)
1684{
1685 int num = 0;
1686 const char *na1 = "https://www.kernel.org/config";
1687 const char *na2 = "http://www.kernel.org/log";
1688 int plen, olen;
1689
1690 arr[num++] = 0x1; /* lu, storage config */
1691 arr[num++] = 0x0; /* reserved */
1692 arr[num++] = 0x0;
1693 olen = strlen(na1);
1694 plen = olen + 1;
1695 if (plen % 4)
1696 plen = ((plen / 4) + 1) * 4;
1697 arr[num++] = plen; /* length, null termianted, padded */
1698 memcpy(arr + num, na1, olen);
1699 memset(arr + num + olen, 0, plen - olen);
1700 num += plen;
1701
1702 arr[num++] = 0x4; /* lu, logging */
1703 arr[num++] = 0x0; /* reserved */
1704 arr[num++] = 0x0;
1705 olen = strlen(na2);
1706 plen = olen + 1;
1707 if (plen % 4)
1708 plen = ((plen / 4) + 1) * 4;
1709 arr[num++] = plen; /* length, null terminated, padded */
1710 memcpy(arr + num, na2, olen);
1711 memset(arr + num + olen, 0, plen - olen);
1712 num += plen;
1713
1714 return num;
1715}
1716
1717/* SCSI ports VPD page */
1718static int inquiry_vpd_88(unsigned char *arr, int target_dev_id)
1719{
1720 int num = 0;
1721 int port_a, port_b;
1722
1723 port_a = target_dev_id + 1;
1724 port_b = port_a + 1;
1725 arr[num++] = 0x0; /* reserved */
1726 arr[num++] = 0x0; /* reserved */
1727 arr[num++] = 0x0;
1728 arr[num++] = 0x1; /* relative port 1 (primary) */
1729 memset(arr + num, 0, 6);
1730 num += 6;
1731 arr[num++] = 0x0;
1732 arr[num++] = 12; /* length tp descriptor */
1733 /* naa-5 target port identifier (A) */
1734 arr[num++] = 0x61; /* proto=sas, binary */
1735 arr[num++] = 0x93; /* PIV=1, target port, NAA */
1736 arr[num++] = 0x0; /* reserved */
1737 arr[num++] = 0x8; /* length */
1738 put_unaligned_be64(naa3_comp_a + port_a, arr + num);
1739 num += 8;
1740 arr[num++] = 0x0; /* reserved */
1741 arr[num++] = 0x0; /* reserved */
1742 arr[num++] = 0x0;
1743 arr[num++] = 0x2; /* relative port 2 (secondary) */
1744 memset(arr + num, 0, 6);
1745 num += 6;
1746 arr[num++] = 0x0;
1747 arr[num++] = 12; /* length tp descriptor */
1748 /* naa-5 target port identifier (B) */
1749 arr[num++] = 0x61; /* proto=sas, binary */
1750 arr[num++] = 0x93; /* PIV=1, target port, NAA */
1751 arr[num++] = 0x0; /* reserved */
1752 arr[num++] = 0x8; /* length */
1753 put_unaligned_be64(naa3_comp_a + port_b, arr + num);
1754 num += 8;
1755
1756 return num;
1757}
1758
1759
1760static unsigned char vpd89_data[] = {
1761/* from 4th byte */ 0,0,0,0,
1762'l','i','n','u','x',' ',' ',' ',
1763'S','A','T',' ','s','c','s','i','_','d','e','b','u','g',' ',' ',
1764'1','2','3','4',
17650x34,0,0,0,1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,
17660xec,0,0,0,
17670x5a,0xc,0xff,0x3f,0x37,0xc8,0x10,0,0,0,0,0,0x3f,0,0,0,
17680,0,0,0,0x58,0x58,0x58,0x58,0x58,0x58,0x58,0x58,0x20,0x20,0x20,0x20,
17690x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0,0,0,0x40,0x4,0,0x2e,0x33,
17700x38,0x31,0x20,0x20,0x20,0x20,0x54,0x53,0x38,0x33,0x30,0x30,0x33,0x31,
17710x53,0x41,
17720x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,
17730x20,0x20,
17740x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,
17750x10,0x80,
17760,0,0,0x2f,0,0,0,0x2,0,0x2,0x7,0,0xff,0xff,0x1,0,
17770x3f,0,0xc1,0xff,0x3e,0,0x10,0x1,0xb0,0xf8,0x50,0x9,0,0,0x7,0,
17780x3,0,0x78,0,0x78,0,0xf0,0,0x78,0,0,0,0,0,0,0,
17790,0,0,0,0,0,0,0,0x2,0,0,0,0,0,0,0,
17800x7e,0,0x1b,0,0x6b,0x34,0x1,0x7d,0x3,0x40,0x69,0x34,0x1,0x3c,0x3,0x40,
17810x7f,0x40,0,0,0,0,0xfe,0xfe,0,0,0,0,0,0xfe,0,0,
17820,0,0,0,0,0,0,0,0xb0,0xf8,0x50,0x9,0,0,0,0,
17830,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
17840,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
17850,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
17860x1,0,0xb0,0xf8,0x50,0x9,0xb0,0xf8,0x50,0x9,0x20,0x20,0x2,0,0xb6,0x42,
17870,0x80,0x8a,0,0x6,0x3c,0xa,0x3c,0xff,0xff,0xc6,0x7,0,0x1,0,0x8,
17880xf0,0xf,0,0x10,0x2,0,0x30,0,0,0,0,0,0,0,0x6,0xfe,
17890,0,0x2,0,0x50,0,0x8a,0,0x4f,0x95,0,0,0x21,0,0xb,0,
17900,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
17910,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
17920,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
17930,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
17940,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
17950,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
17960,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
17970,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
17980,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
17990,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
18000,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
18010,0,0,0,0,0,0,0,0,0,0,0,0,0,0xa5,0x51,
1802};
1803
1804/* ATA Information VPD page */
1805static int inquiry_vpd_89(unsigned char *arr)
1806{
1807 memcpy(arr, vpd89_data, sizeof(vpd89_data));
1808 return sizeof(vpd89_data);
1809}
1810
1811
1812static unsigned char vpdb0_data[] = {
1813 /* from 4th byte */ 0,0,0,4, 0,0,0x4,0, 0,0,0,64,
1814 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1815 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1816 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1817};
1818
1819/* Block limits VPD page (SBC-3) */
1820static int inquiry_vpd_b0(unsigned char *arr)
1821{
1822 unsigned int gran;
1823
1824 memcpy(arr, vpdb0_data, sizeof(vpdb0_data));
1825
1826 /* Optimal transfer length granularity */
1827 if (sdebug_opt_xferlen_exp != 0 &&
1828 sdebug_physblk_exp < sdebug_opt_xferlen_exp)
1829 gran = 1 << sdebug_opt_xferlen_exp;
1830 else
1831 gran = 1 << sdebug_physblk_exp;
1832 put_unaligned_be16(gran, arr + 2);
1833
1834 /* Maximum Transfer Length */
1835 if (sdebug_store_sectors > 0x400)
1836 put_unaligned_be32(sdebug_store_sectors, arr + 4);
1837
1838 /* Optimal Transfer Length */
1839 put_unaligned_be32(sdebug_opt_blks, &arr[8]);
1840
1841 if (sdebug_lbpu) {
1842 /* Maximum Unmap LBA Count */
1843 put_unaligned_be32(sdebug_unmap_max_blocks, &arr[16]);
1844
1845 /* Maximum Unmap Block Descriptor Count */
1846 put_unaligned_be32(sdebug_unmap_max_desc, &arr[20]);
1847 }
1848
1849 /* Unmap Granularity Alignment */
1850 if (sdebug_unmap_alignment) {
1851 put_unaligned_be32(sdebug_unmap_alignment, &arr[28]);
1852 arr[28] |= 0x80; /* UGAVALID */
1853 }
1854
1855 /* Optimal Unmap Granularity */
1856 put_unaligned_be32(sdebug_unmap_granularity, &arr[24]);
1857
1858 /* Maximum WRITE SAME Length */
1859 put_unaligned_be64(sdebug_write_same_length, &arr[32]);
1860
1861 if (sdebug_atomic_wr) {
1862 put_unaligned_be32(sdebug_atomic_wr_max_length, &arr[40]);
1863 put_unaligned_be32(sdebug_atomic_wr_align, &arr[44]);
1864 put_unaligned_be32(sdebug_atomic_wr_gran, &arr[48]);
1865 put_unaligned_be32(sdebug_atomic_wr_max_length_bndry, &arr[52]);
1866 put_unaligned_be32(sdebug_atomic_wr_max_bndry, &arr[56]);
1867 }
1868
1869 return 0x3c; /* Mandatory page length for Logical Block Provisioning */
1870}
1871
1872/* Block device characteristics VPD page (SBC-3) */
1873static int inquiry_vpd_b1(struct sdebug_dev_info *devip, unsigned char *arr)
1874{
1875 memset(arr, 0, 0x3c);
1876 arr[0] = 0;
1877 arr[1] = 1; /* non rotating medium (e.g. solid state) */
1878 arr[2] = 0;
1879 arr[3] = 5; /* less than 1.8" */
1880
1881 return 0x3c;
1882}
1883
1884/* Logical block provisioning VPD page (SBC-4) */
1885static int inquiry_vpd_b2(unsigned char *arr)
1886{
1887 memset(arr, 0, 0x4);
1888 arr[0] = 0; /* threshold exponent */
1889 if (sdebug_lbpu)
1890 arr[1] = 1 << 7;
1891 if (sdebug_lbpws)
1892 arr[1] |= 1 << 6;
1893 if (sdebug_lbpws10)
1894 arr[1] |= 1 << 5;
1895 if (sdebug_lbprz && scsi_debug_lbp())
1896 arr[1] |= (sdebug_lbprz & 0x7) << 2; /* sbc4r07 and later */
1897 /* anc_sup=0; dp=0 (no provisioning group descriptor) */
1898 /* minimum_percentage=0; provisioning_type=0 (unknown) */
1899 /* threshold_percentage=0 */
1900 return 0x4;
1901}
1902
1903/* Zoned block device characteristics VPD page (ZBC mandatory) */
1904static int inquiry_vpd_b6(struct sdebug_dev_info *devip, unsigned char *arr)
1905{
1906 memset(arr, 0, 0x3c);
1907 arr[0] = 0x1; /* set URSWRZ (unrestricted read in seq. wr req zone) */
1908 /*
1909 * Set Optimal number of open sequential write preferred zones and
1910 * Optimal number of non-sequentially written sequential write
1911 * preferred zones fields to 'not reported' (0xffffffff). Leave other
1912 * fields set to zero, apart from Max. number of open swrz_s field.
1913 */
1914 put_unaligned_be32(0xffffffff, &arr[4]);
1915 put_unaligned_be32(0xffffffff, &arr[8]);
1916 if (sdeb_zbc_model == BLK_ZONED_HM && devip->max_open)
1917 put_unaligned_be32(devip->max_open, &arr[12]);
1918 else
1919 put_unaligned_be32(0xffffffff, &arr[12]);
1920 if (devip->zcap < devip->zsize) {
1921 arr[19] = ZBC_CONSTANT_ZONE_START_OFFSET;
1922 put_unaligned_be64(devip->zsize, &arr[20]);
1923 } else {
1924 arr[19] = 0;
1925 }
1926 return 0x3c;
1927}
1928
1929#define SDEBUG_BLE_LEN_AFTER_B4 28 /* thus vpage 32 bytes long */
1930
1931enum { MAXIMUM_NUMBER_OF_STREAMS = 6, PERMANENT_STREAM_COUNT = 5 };
1932
1933/* Block limits extension VPD page (SBC-4) */
1934static int inquiry_vpd_b7(unsigned char *arrb4)
1935{
1936 memset(arrb4, 0, SDEBUG_BLE_LEN_AFTER_B4);
1937 arrb4[1] = 1; /* Reduced stream control support (RSCS) */
1938 put_unaligned_be16(MAXIMUM_NUMBER_OF_STREAMS, &arrb4[2]);
1939 return SDEBUG_BLE_LEN_AFTER_B4;
1940}
1941
1942#define SDEBUG_LONG_INQ_SZ 96
1943#define SDEBUG_MAX_INQ_ARR_SZ 584
1944
1945static int resp_inquiry(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
1946{
1947 unsigned char pq_pdt;
1948 unsigned char *arr;
1949 unsigned char *cmd = scp->cmnd;
1950 u32 alloc_len, n;
1951 int ret;
1952 bool have_wlun, is_disk, is_zbc, is_disk_zbc;
1953
1954 alloc_len = get_unaligned_be16(cmd + 3);
1955 arr = kzalloc(SDEBUG_MAX_INQ_ARR_SZ, GFP_ATOMIC);
1956 if (! arr)
1957 return DID_REQUEUE << 16;
1958 is_disk = (sdebug_ptype == TYPE_DISK);
1959 is_zbc = devip->zoned;
1960 is_disk_zbc = (is_disk || is_zbc);
1961 have_wlun = scsi_is_wlun(scp->device->lun);
1962 if (have_wlun)
1963 pq_pdt = TYPE_WLUN; /* present, wlun */
1964 else if (sdebug_no_lun_0 && (devip->lun == SDEBUG_LUN_0_VAL))
1965 pq_pdt = 0x7f; /* not present, PQ=3, PDT=0x1f */
1966 else
1967 pq_pdt = (sdebug_ptype & 0x1f);
1968 arr[0] = pq_pdt;
1969 if (0x2 & cmd[1]) { /* CMDDT bit set */
1970 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 1);
1971 kfree(arr);
1972 return check_condition_result;
1973 } else if (0x1 & cmd[1]) { /* EVPD bit set */
1974 int lu_id_num, port_group_id, target_dev_id;
1975 u32 len;
1976 char lu_id_str[6];
1977 int host_no = devip->sdbg_host->shost->host_no;
1978
1979 arr[1] = cmd[2];
1980 port_group_id = (((host_no + 1) & 0x7f) << 8) +
1981 (devip->channel & 0x7f);
1982 if (sdebug_vpd_use_hostno == 0)
1983 host_no = 0;
1984 lu_id_num = have_wlun ? -1 : (((host_no + 1) * 2000) +
1985 (devip->target * 1000) + devip->lun);
1986 target_dev_id = ((host_no + 1) * 2000) +
1987 (devip->target * 1000) - 3;
1988 len = scnprintf(lu_id_str, 6, "%d", lu_id_num);
1989 if (0 == cmd[2]) { /* supported vital product data pages */
1990 n = 4;
1991 arr[n++] = 0x0; /* this page */
1992 arr[n++] = 0x80; /* unit serial number */
1993 arr[n++] = 0x83; /* device identification */
1994 arr[n++] = 0x84; /* software interface ident. */
1995 arr[n++] = 0x85; /* management network addresses */
1996 arr[n++] = 0x86; /* extended inquiry */
1997 arr[n++] = 0x87; /* mode page policy */
1998 arr[n++] = 0x88; /* SCSI ports */
1999 if (is_disk_zbc) { /* SBC or ZBC */
2000 arr[n++] = 0x89; /* ATA information */
2001 arr[n++] = 0xb0; /* Block limits */
2002 arr[n++] = 0xb1; /* Block characteristics */
2003 if (is_disk)
2004 arr[n++] = 0xb2; /* LB Provisioning */
2005 if (is_zbc)
2006 arr[n++] = 0xb6; /* ZB dev. char. */
2007 arr[n++] = 0xb7; /* Block limits extension */
2008 }
2009 arr[3] = n - 4; /* number of supported VPD pages */
2010 } else if (0x80 == cmd[2]) { /* unit serial number */
2011 arr[3] = len;
2012 memcpy(&arr[4], lu_id_str, len);
2013 } else if (0x83 == cmd[2]) { /* device identification */
2014 arr[3] = inquiry_vpd_83(&arr[4], port_group_id,
2015 target_dev_id, lu_id_num,
2016 lu_id_str, len,
2017 &devip->lu_name);
2018 } else if (0x84 == cmd[2]) { /* Software interface ident. */
2019 arr[3] = inquiry_vpd_84(&arr[4]);
2020 } else if (0x85 == cmd[2]) { /* Management network addresses */
2021 arr[3] = inquiry_vpd_85(&arr[4]);
2022 } else if (0x86 == cmd[2]) { /* extended inquiry */
2023 arr[3] = 0x3c; /* number of following entries */
2024 if (sdebug_dif == T10_PI_TYPE3_PROTECTION)
2025 arr[4] = 0x4; /* SPT: GRD_CHK:1 */
2026 else if (have_dif_prot)
2027 arr[4] = 0x5; /* SPT: GRD_CHK:1, REF_CHK:1 */
2028 else
2029 arr[4] = 0x0; /* no protection stuff */
2030 /*
2031 * GROUP_SUP=1; HEADSUP=1 (HEAD OF QUEUE); ORDSUP=1
2032 * (ORDERED queuing); SIMPSUP=1 (SIMPLE queuing).
2033 */
2034 arr[5] = 0x17;
2035 } else if (0x87 == cmd[2]) { /* mode page policy */
2036 arr[3] = 0x8; /* number of following entries */
2037 arr[4] = 0x2; /* disconnect-reconnect mp */
2038 arr[6] = 0x80; /* mlus, shared */
2039 arr[8] = 0x18; /* protocol specific lu */
2040 arr[10] = 0x82; /* mlus, per initiator port */
2041 } else if (0x88 == cmd[2]) { /* SCSI Ports */
2042 arr[3] = inquiry_vpd_88(&arr[4], target_dev_id);
2043 } else if (is_disk_zbc && 0x89 == cmd[2]) { /* ATA info */
2044 n = inquiry_vpd_89(&arr[4]);
2045 put_unaligned_be16(n, arr + 2);
2046 } else if (is_disk_zbc && 0xb0 == cmd[2]) { /* Block limits */
2047 arr[3] = inquiry_vpd_b0(&arr[4]);
2048 } else if (is_disk_zbc && 0xb1 == cmd[2]) { /* Block char. */
2049 arr[3] = inquiry_vpd_b1(devip, &arr[4]);
2050 } else if (is_disk && 0xb2 == cmd[2]) { /* LB Prov. */
2051 arr[3] = inquiry_vpd_b2(&arr[4]);
2052 } else if (is_zbc && cmd[2] == 0xb6) { /* ZB dev. charact. */
2053 arr[3] = inquiry_vpd_b6(devip, &arr[4]);
2054 } else if (cmd[2] == 0xb7) { /* block limits extension page */
2055 arr[3] = inquiry_vpd_b7(&arr[4]);
2056 } else {
2057 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, -1);
2058 kfree(arr);
2059 return check_condition_result;
2060 }
2061 len = min_t(u32, get_unaligned_be16(arr + 2) + 4, alloc_len);
2062 ret = fill_from_dev_buffer(scp, arr,
2063 min_t(u32, len, SDEBUG_MAX_INQ_ARR_SZ));
2064 kfree(arr);
2065 return ret;
2066 }
2067 /* drops through here for a standard inquiry */
2068 arr[1] = sdebug_removable ? 0x80 : 0; /* Removable disk */
2069 arr[2] = sdebug_scsi_level;
2070 arr[3] = 2; /* response_data_format==2 */
2071 arr[4] = SDEBUG_LONG_INQ_SZ - 5;
2072 arr[5] = (int)have_dif_prot; /* PROTECT bit */
2073 if (sdebug_vpd_use_hostno == 0)
2074 arr[5] |= 0x10; /* claim: implicit TPGS */
2075 arr[6] = 0x10; /* claim: MultiP */
2076 /* arr[6] |= 0x40; ... claim: EncServ (enclosure services) */
2077 arr[7] = 0xa; /* claim: LINKED + CMDQUE */
2078 memcpy(&arr[8], sdebug_inq_vendor_id, 8);
2079 memcpy(&arr[16], sdebug_inq_product_id, 16);
2080 memcpy(&arr[32], sdebug_inq_product_rev, 4);
2081 /* Use Vendor Specific area to place driver date in ASCII hex */
2082 memcpy(&arr[36], sdebug_version_date, 8);
2083 /* version descriptors (2 bytes each) follow */
2084 put_unaligned_be16(0xc0, arr + 58); /* SAM-6 no version claimed */
2085 put_unaligned_be16(0x5c0, arr + 60); /* SPC-5 no version claimed */
2086 n = 62;
2087 if (is_disk) { /* SBC-4 no version claimed */
2088 put_unaligned_be16(0x600, arr + n);
2089 n += 2;
2090 } else if (sdebug_ptype == TYPE_TAPE) { /* SSC-4 rev 3 */
2091 put_unaligned_be16(0x525, arr + n);
2092 n += 2;
2093 } else if (is_zbc) { /* ZBC BSR INCITS 536 revision 05 */
2094 put_unaligned_be16(0x624, arr + n);
2095 n += 2;
2096 }
2097 put_unaligned_be16(0x2100, arr + n); /* SPL-4 no version claimed */
2098 ret = fill_from_dev_buffer(scp, arr,
2099 min_t(u32, alloc_len, SDEBUG_LONG_INQ_SZ));
2100 kfree(arr);
2101 return ret;
2102}
2103
2104/* See resp_iec_m_pg() for how this data is manipulated */
2105static unsigned char iec_m_pg[] = {0x1c, 0xa, 0x08, 0, 0, 0, 0, 0,
2106 0, 0, 0x0, 0x0};
2107
2108static int resp_requests(struct scsi_cmnd *scp,
2109 struct sdebug_dev_info *devip)
2110{
2111 unsigned char *cmd = scp->cmnd;
2112 unsigned char arr[SCSI_SENSE_BUFFERSIZE]; /* assume >= 18 bytes */
2113 bool dsense = !!(cmd[1] & 1);
2114 u32 alloc_len = cmd[4];
2115 u32 len = 18;
2116 int stopped_state = atomic_read(&devip->stopped);
2117
2118 memset(arr, 0, sizeof(arr));
2119 if (stopped_state > 0) { /* some "pollable" data [spc6r02: 5.12.2] */
2120 if (dsense) {
2121 arr[0] = 0x72;
2122 arr[1] = NOT_READY;
2123 arr[2] = LOGICAL_UNIT_NOT_READY;
2124 arr[3] = (stopped_state == 2) ? 0x1 : 0x2;
2125 len = 8;
2126 } else {
2127 arr[0] = 0x70;
2128 arr[2] = NOT_READY; /* NO_SENSE in sense_key */
2129 arr[7] = 0xa; /* 18 byte sense buffer */
2130 arr[12] = LOGICAL_UNIT_NOT_READY;
2131 arr[13] = (stopped_state == 2) ? 0x1 : 0x2;
2132 }
2133 } else if ((iec_m_pg[2] & 0x4) && (6 == (iec_m_pg[3] & 0xf))) {
2134 /* Information exceptions control mode page: TEST=1, MRIE=6 */
2135 if (dsense) {
2136 arr[0] = 0x72;
2137 arr[1] = 0x0; /* NO_SENSE in sense_key */
2138 arr[2] = THRESHOLD_EXCEEDED;
2139 arr[3] = 0xff; /* Failure prediction(false) */
2140 len = 8;
2141 } else {
2142 arr[0] = 0x70;
2143 arr[2] = 0x0; /* NO_SENSE in sense_key */
2144 arr[7] = 0xa; /* 18 byte sense buffer */
2145 arr[12] = THRESHOLD_EXCEEDED;
2146 arr[13] = 0xff; /* Failure prediction(false) */
2147 }
2148 } else { /* nothing to report */
2149 if (dsense) {
2150 len = 8;
2151 memset(arr, 0, len);
2152 arr[0] = 0x72;
2153 } else {
2154 memset(arr, 0, len);
2155 arr[0] = 0x70;
2156 arr[7] = 0xa;
2157 }
2158 }
2159 return fill_from_dev_buffer(scp, arr, min_t(u32, len, alloc_len));
2160}
2161
2162static int resp_start_stop(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
2163{
2164 unsigned char *cmd = scp->cmnd;
2165 int power_cond, want_stop, stopped_state;
2166 bool changing;
2167
2168 power_cond = (cmd[4] & 0xf0) >> 4;
2169 if (power_cond) {
2170 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 4, 7);
2171 return check_condition_result;
2172 }
2173 want_stop = !(cmd[4] & 1);
2174 stopped_state = atomic_read(&devip->stopped);
2175 if (stopped_state == 2) {
2176 ktime_t now_ts = ktime_get_boottime();
2177
2178 if (ktime_to_ns(now_ts) > ktime_to_ns(devip->create_ts)) {
2179 u64 diff_ns = ktime_to_ns(ktime_sub(now_ts, devip->create_ts));
2180
2181 if (diff_ns >= ((u64)sdeb_tur_ms_to_ready * 1000000)) {
2182 /* tur_ms_to_ready timer extinguished */
2183 atomic_set(&devip->stopped, 0);
2184 stopped_state = 0;
2185 }
2186 }
2187 if (stopped_state == 2) {
2188 if (want_stop) {
2189 stopped_state = 1; /* dummy up success */
2190 } else { /* Disallow tur_ms_to_ready delay to be overridden */
2191 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 4, 0 /* START bit */);
2192 return check_condition_result;
2193 }
2194 }
2195 }
2196 changing = (stopped_state != want_stop);
2197 if (changing)
2198 atomic_xchg(&devip->stopped, want_stop);
2199 if (!changing || (cmd[1] & 0x1)) /* state unchanged or IMMED bit set in cdb */
2200 return SDEG_RES_IMMED_MASK;
2201 else
2202 return 0;
2203}
2204
2205static sector_t get_sdebug_capacity(void)
2206{
2207 static const unsigned int gibibyte = 1073741824;
2208
2209 if (sdebug_virtual_gb > 0)
2210 return (sector_t)sdebug_virtual_gb *
2211 (gibibyte / sdebug_sector_size);
2212 else
2213 return sdebug_store_sectors;
2214}
2215
2216#define SDEBUG_READCAP_ARR_SZ 8
2217static int resp_readcap(struct scsi_cmnd *scp,
2218 struct sdebug_dev_info *devip)
2219{
2220 unsigned char arr[SDEBUG_READCAP_ARR_SZ];
2221 unsigned int capac;
2222
2223 /* following just in case virtual_gb changed */
2224 sdebug_capacity = get_sdebug_capacity();
2225 memset(arr, 0, SDEBUG_READCAP_ARR_SZ);
2226 if (sdebug_capacity < 0xffffffff) {
2227 capac = (unsigned int)sdebug_capacity - 1;
2228 put_unaligned_be32(capac, arr + 0);
2229 } else
2230 put_unaligned_be32(0xffffffff, arr + 0);
2231 put_unaligned_be16(sdebug_sector_size, arr + 6);
2232 return fill_from_dev_buffer(scp, arr, SDEBUG_READCAP_ARR_SZ);
2233}
2234
2235#define SDEBUG_READCAP16_ARR_SZ 32
2236static int resp_readcap16(struct scsi_cmnd *scp,
2237 struct sdebug_dev_info *devip)
2238{
2239 unsigned char *cmd = scp->cmnd;
2240 unsigned char arr[SDEBUG_READCAP16_ARR_SZ];
2241 u32 alloc_len;
2242
2243 alloc_len = get_unaligned_be32(cmd + 10);
2244 /* following just in case virtual_gb changed */
2245 sdebug_capacity = get_sdebug_capacity();
2246 memset(arr, 0, SDEBUG_READCAP16_ARR_SZ);
2247 put_unaligned_be64((u64)(sdebug_capacity - 1), arr + 0);
2248 put_unaligned_be32(sdebug_sector_size, arr + 8);
2249 arr[13] = sdebug_physblk_exp & 0xf;
2250 arr[14] = (sdebug_lowest_aligned >> 8) & 0x3f;
2251
2252 if (scsi_debug_lbp()) {
2253 arr[14] |= 0x80; /* LBPME */
2254 /* from sbc4r07, this LBPRZ field is 1 bit, but the LBPRZ in
2255 * the LB Provisioning VPD page is 3 bits. Note that lbprz=2
2256 * in the wider field maps to 0 in this field.
2257 */
2258 if (sdebug_lbprz & 1) /* precisely what the draft requires */
2259 arr[14] |= 0x40;
2260 }
2261
2262 /*
2263 * Since the scsi_debug READ CAPACITY implementation always reports the
2264 * total disk capacity, set RC BASIS = 1 for host-managed ZBC devices.
2265 */
2266 if (devip->zoned)
2267 arr[12] |= 1 << 4;
2268
2269 arr[15] = sdebug_lowest_aligned & 0xff;
2270
2271 if (have_dif_prot) {
2272 arr[12] = (sdebug_dif - 1) << 1; /* P_TYPE */
2273 arr[12] |= 1; /* PROT_EN */
2274 }
2275
2276 return fill_from_dev_buffer(scp, arr,
2277 min_t(u32, alloc_len, SDEBUG_READCAP16_ARR_SZ));
2278}
2279
2280#define SDEBUG_MAX_TGTPGS_ARR_SZ 1412
2281
2282static int resp_report_tgtpgs(struct scsi_cmnd *scp,
2283 struct sdebug_dev_info *devip)
2284{
2285 unsigned char *cmd = scp->cmnd;
2286 unsigned char *arr;
2287 int host_no = devip->sdbg_host->shost->host_no;
2288 int port_group_a, port_group_b, port_a, port_b;
2289 u32 alen, n, rlen;
2290 int ret;
2291
2292 alen = get_unaligned_be32(cmd + 6);
2293 arr = kzalloc(SDEBUG_MAX_TGTPGS_ARR_SZ, GFP_ATOMIC);
2294 if (! arr)
2295 return DID_REQUEUE << 16;
2296 /*
2297 * EVPD page 0x88 states we have two ports, one
2298 * real and a fake port with no device connected.
2299 * So we create two port groups with one port each
2300 * and set the group with port B to unavailable.
2301 */
2302 port_a = 0x1; /* relative port A */
2303 port_b = 0x2; /* relative port B */
2304 port_group_a = (((host_no + 1) & 0x7f) << 8) +
2305 (devip->channel & 0x7f);
2306 port_group_b = (((host_no + 1) & 0x7f) << 8) +
2307 (devip->channel & 0x7f) + 0x80;
2308
2309 /*
2310 * The asymmetric access state is cycled according to the host_id.
2311 */
2312 n = 4;
2313 if (sdebug_vpd_use_hostno == 0) {
2314 arr[n++] = host_no % 3; /* Asymm access state */
2315 arr[n++] = 0x0F; /* claim: all states are supported */
2316 } else {
2317 arr[n++] = 0x0; /* Active/Optimized path */
2318 arr[n++] = 0x01; /* only support active/optimized paths */
2319 }
2320 put_unaligned_be16(port_group_a, arr + n);
2321 n += 2;
2322 arr[n++] = 0; /* Reserved */
2323 arr[n++] = 0; /* Status code */
2324 arr[n++] = 0; /* Vendor unique */
2325 arr[n++] = 0x1; /* One port per group */
2326 arr[n++] = 0; /* Reserved */
2327 arr[n++] = 0; /* Reserved */
2328 put_unaligned_be16(port_a, arr + n);
2329 n += 2;
2330 arr[n++] = 3; /* Port unavailable */
2331 arr[n++] = 0x08; /* claim: only unavailalbe paths are supported */
2332 put_unaligned_be16(port_group_b, arr + n);
2333 n += 2;
2334 arr[n++] = 0; /* Reserved */
2335 arr[n++] = 0; /* Status code */
2336 arr[n++] = 0; /* Vendor unique */
2337 arr[n++] = 0x1; /* One port per group */
2338 arr[n++] = 0; /* Reserved */
2339 arr[n++] = 0; /* Reserved */
2340 put_unaligned_be16(port_b, arr + n);
2341 n += 2;
2342
2343 rlen = n - 4;
2344 put_unaligned_be32(rlen, arr + 0);
2345
2346 /*
2347 * Return the smallest value of either
2348 * - The allocated length
2349 * - The constructed command length
2350 * - The maximum array size
2351 */
2352 rlen = min(alen, n);
2353 ret = fill_from_dev_buffer(scp, arr,
2354 min_t(u32, rlen, SDEBUG_MAX_TGTPGS_ARR_SZ));
2355 kfree(arr);
2356 return ret;
2357}
2358
2359static int resp_rsup_opcodes(struct scsi_cmnd *scp,
2360 struct sdebug_dev_info *devip)
2361{
2362 bool rctd;
2363 u8 reporting_opts, req_opcode, sdeb_i, supp;
2364 u16 req_sa, u;
2365 u32 alloc_len, a_len;
2366 int k, offset, len, errsts, count, bump, na;
2367 const struct opcode_info_t *oip;
2368 const struct opcode_info_t *r_oip;
2369 u8 *arr;
2370 u8 *cmd = scp->cmnd;
2371
2372 rctd = !!(cmd[2] & 0x80);
2373 reporting_opts = cmd[2] & 0x7;
2374 req_opcode = cmd[3];
2375 req_sa = get_unaligned_be16(cmd + 4);
2376 alloc_len = get_unaligned_be32(cmd + 6);
2377 if (alloc_len < 4 || alloc_len > 0xffff) {
2378 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 6, -1);
2379 return check_condition_result;
2380 }
2381 if (alloc_len > 8192)
2382 a_len = 8192;
2383 else
2384 a_len = alloc_len;
2385 arr = kzalloc((a_len < 256) ? 320 : a_len + 64, GFP_ATOMIC);
2386 if (NULL == arr) {
2387 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
2388 INSUFF_RES_ASCQ);
2389 return check_condition_result;
2390 }
2391 switch (reporting_opts) {
2392 case 0: /* all commands */
2393 /* count number of commands */
2394 for (count = 0, oip = opcode_info_arr;
2395 oip->num_attached != 0xff; ++oip) {
2396 if (F_INV_OP & oip->flags)
2397 continue;
2398 count += (oip->num_attached + 1);
2399 }
2400 bump = rctd ? 20 : 8;
2401 put_unaligned_be32(count * bump, arr);
2402 for (offset = 4, oip = opcode_info_arr;
2403 oip->num_attached != 0xff && offset < a_len; ++oip) {
2404 if (F_INV_OP & oip->flags)
2405 continue;
2406 na = oip->num_attached;
2407 arr[offset] = oip->opcode;
2408 put_unaligned_be16(oip->sa, arr + offset + 2);
2409 if (rctd)
2410 arr[offset + 5] |= 0x2;
2411 if (FF_SA & oip->flags)
2412 arr[offset + 5] |= 0x1;
2413 put_unaligned_be16(oip->len_mask[0], arr + offset + 6);
2414 if (rctd)
2415 put_unaligned_be16(0xa, arr + offset + 8);
2416 r_oip = oip;
2417 for (k = 0, oip = oip->arrp; k < na; ++k, ++oip) {
2418 if (F_INV_OP & oip->flags)
2419 continue;
2420 offset += bump;
2421 arr[offset] = oip->opcode;
2422 put_unaligned_be16(oip->sa, arr + offset + 2);
2423 if (rctd)
2424 arr[offset + 5] |= 0x2;
2425 if (FF_SA & oip->flags)
2426 arr[offset + 5] |= 0x1;
2427 put_unaligned_be16(oip->len_mask[0],
2428 arr + offset + 6);
2429 if (rctd)
2430 put_unaligned_be16(0xa,
2431 arr + offset + 8);
2432 }
2433 oip = r_oip;
2434 offset += bump;
2435 }
2436 break;
2437 case 1: /* one command: opcode only */
2438 case 2: /* one command: opcode plus service action */
2439 case 3: /* one command: if sa==0 then opcode only else opcode+sa */
2440 sdeb_i = opcode_ind_arr[req_opcode];
2441 oip = &opcode_info_arr[sdeb_i];
2442 if (F_INV_OP & oip->flags) {
2443 supp = 1;
2444 offset = 4;
2445 } else {
2446 if (1 == reporting_opts) {
2447 if (FF_SA & oip->flags) {
2448 mk_sense_invalid_fld(scp, SDEB_IN_CDB,
2449 2, 2);
2450 kfree(arr);
2451 return check_condition_result;
2452 }
2453 req_sa = 0;
2454 } else if (2 == reporting_opts &&
2455 0 == (FF_SA & oip->flags)) {
2456 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 4, -1);
2457 kfree(arr); /* point at requested sa */
2458 return check_condition_result;
2459 }
2460 if (0 == (FF_SA & oip->flags) &&
2461 req_opcode == oip->opcode)
2462 supp = 3;
2463 else if (0 == (FF_SA & oip->flags)) {
2464 na = oip->num_attached;
2465 for (k = 0, oip = oip->arrp; k < na;
2466 ++k, ++oip) {
2467 if (req_opcode == oip->opcode)
2468 break;
2469 }
2470 supp = (k >= na) ? 1 : 3;
2471 } else if (req_sa != oip->sa) {
2472 na = oip->num_attached;
2473 for (k = 0, oip = oip->arrp; k < na;
2474 ++k, ++oip) {
2475 if (req_sa == oip->sa)
2476 break;
2477 }
2478 supp = (k >= na) ? 1 : 3;
2479 } else
2480 supp = 3;
2481 if (3 == supp) {
2482 u = oip->len_mask[0];
2483 put_unaligned_be16(u, arr + 2);
2484 arr[4] = oip->opcode;
2485 for (k = 1; k < u; ++k)
2486 arr[4 + k] = (k < 16) ?
2487 oip->len_mask[k] : 0xff;
2488 offset = 4 + u;
2489 } else
2490 offset = 4;
2491 }
2492 arr[1] = (rctd ? 0x80 : 0) | supp;
2493 if (rctd) {
2494 put_unaligned_be16(0xa, arr + offset);
2495 offset += 12;
2496 }
2497 break;
2498 default:
2499 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 2);
2500 kfree(arr);
2501 return check_condition_result;
2502 }
2503 offset = (offset < a_len) ? offset : a_len;
2504 len = (offset < alloc_len) ? offset : alloc_len;
2505 errsts = fill_from_dev_buffer(scp, arr, len);
2506 kfree(arr);
2507 return errsts;
2508}
2509
2510static int resp_rsup_tmfs(struct scsi_cmnd *scp,
2511 struct sdebug_dev_info *devip)
2512{
2513 bool repd;
2514 u32 alloc_len, len;
2515 u8 arr[16];
2516 u8 *cmd = scp->cmnd;
2517
2518 memset(arr, 0, sizeof(arr));
2519 repd = !!(cmd[2] & 0x80);
2520 alloc_len = get_unaligned_be32(cmd + 6);
2521 if (alloc_len < 4) {
2522 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 6, -1);
2523 return check_condition_result;
2524 }
2525 arr[0] = 0xc8; /* ATS | ATSS | LURS */
2526 arr[1] = 0x1; /* ITNRS */
2527 if (repd) {
2528 arr[3] = 0xc;
2529 len = 16;
2530 } else
2531 len = 4;
2532
2533 len = (len < alloc_len) ? len : alloc_len;
2534 return fill_from_dev_buffer(scp, arr, len);
2535}
2536
2537/* <<Following mode page info copied from ST318451LW>> */
2538
2539static int resp_err_recov_pg(unsigned char *p, int pcontrol, int target)
2540{ /* Read-Write Error Recovery page for mode_sense */
2541 unsigned char err_recov_pg[] = {0x1, 0xa, 0xc0, 11, 240, 0, 0, 0,
2542 5, 0, 0xff, 0xff};
2543
2544 memcpy(p, err_recov_pg, sizeof(err_recov_pg));
2545 if (1 == pcontrol)
2546 memset(p + 2, 0, sizeof(err_recov_pg) - 2);
2547 return sizeof(err_recov_pg);
2548}
2549
2550static int resp_disconnect_pg(unsigned char *p, int pcontrol, int target)
2551{ /* Disconnect-Reconnect page for mode_sense */
2552 unsigned char disconnect_pg[] = {0x2, 0xe, 128, 128, 0, 10, 0, 0,
2553 0, 0, 0, 0, 0, 0, 0, 0};
2554
2555 memcpy(p, disconnect_pg, sizeof(disconnect_pg));
2556 if (1 == pcontrol)
2557 memset(p + 2, 0, sizeof(disconnect_pg) - 2);
2558 return sizeof(disconnect_pg);
2559}
2560
2561static int resp_format_pg(unsigned char *p, int pcontrol, int target)
2562{ /* Format device page for mode_sense */
2563 unsigned char format_pg[] = {0x3, 0x16, 0, 0, 0, 0, 0, 0,
2564 0, 0, 0, 0, 0, 0, 0, 0,
2565 0, 0, 0, 0, 0x40, 0, 0, 0};
2566
2567 memcpy(p, format_pg, sizeof(format_pg));
2568 put_unaligned_be16(sdebug_sectors_per, p + 10);
2569 put_unaligned_be16(sdebug_sector_size, p + 12);
2570 if (sdebug_removable)
2571 p[20] |= 0x20; /* should agree with INQUIRY */
2572 if (1 == pcontrol)
2573 memset(p + 2, 0, sizeof(format_pg) - 2);
2574 return sizeof(format_pg);
2575}
2576
2577static unsigned char caching_pg[] = {0x8, 18, 0x14, 0, 0xff, 0xff, 0, 0,
2578 0xff, 0xff, 0xff, 0xff, 0x80, 0x14, 0, 0,
2579 0, 0, 0, 0};
2580
2581static int resp_caching_pg(unsigned char *p, int pcontrol, int target)
2582{ /* Caching page for mode_sense */
2583 unsigned char ch_caching_pg[] = {/* 0x8, 18, */ 0x4, 0, 0, 0, 0, 0,
2584 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
2585 unsigned char d_caching_pg[] = {0x8, 18, 0x14, 0, 0xff, 0xff, 0, 0,
2586 0xff, 0xff, 0xff, 0xff, 0x80, 0x14, 0, 0, 0, 0, 0, 0};
2587
2588 if (SDEBUG_OPT_N_WCE & sdebug_opts)
2589 caching_pg[2] &= ~0x4; /* set WCE=0 (default WCE=1) */
2590 memcpy(p, caching_pg, sizeof(caching_pg));
2591 if (1 == pcontrol)
2592 memcpy(p + 2, ch_caching_pg, sizeof(ch_caching_pg));
2593 else if (2 == pcontrol)
2594 memcpy(p, d_caching_pg, sizeof(d_caching_pg));
2595 return sizeof(caching_pg);
2596}
2597
2598static unsigned char ctrl_m_pg[] = {0xa, 10, 2, 0, 0, 0, 0, 0,
2599 0, 0, 0x2, 0x4b};
2600
2601static int resp_ctrl_m_pg(unsigned char *p, int pcontrol, int target)
2602{ /* Control mode page for mode_sense */
2603 unsigned char ch_ctrl_m_pg[] = {/* 0xa, 10, */ 0x6, 0, 0, 0, 0, 0,
2604 0, 0, 0, 0};
2605 unsigned char d_ctrl_m_pg[] = {0xa, 10, 2, 0, 0, 0, 0, 0,
2606 0, 0, 0x2, 0x4b};
2607
2608 if (sdebug_dsense)
2609 ctrl_m_pg[2] |= 0x4;
2610 else
2611 ctrl_m_pg[2] &= ~0x4;
2612
2613 if (sdebug_ato)
2614 ctrl_m_pg[5] |= 0x80; /* ATO=1 */
2615
2616 memcpy(p, ctrl_m_pg, sizeof(ctrl_m_pg));
2617 if (1 == pcontrol)
2618 memcpy(p + 2, ch_ctrl_m_pg, sizeof(ch_ctrl_m_pg));
2619 else if (2 == pcontrol)
2620 memcpy(p, d_ctrl_m_pg, sizeof(d_ctrl_m_pg));
2621 return sizeof(ctrl_m_pg);
2622}
2623
2624/* IO Advice Hints Grouping mode page */
2625static int resp_grouping_m_pg(unsigned char *p, int pcontrol, int target)
2626{
2627 /* IO Advice Hints Grouping mode page */
2628 struct grouping_m_pg {
2629 u8 page_code; /* OR 0x40 when subpage_code > 0 */
2630 u8 subpage_code;
2631 __be16 page_length;
2632 u8 reserved[12];
2633 struct scsi_io_group_descriptor descr[MAXIMUM_NUMBER_OF_STREAMS];
2634 };
2635 static const struct grouping_m_pg gr_m_pg = {
2636 .page_code = 0xa | 0x40,
2637 .subpage_code = 5,
2638 .page_length = cpu_to_be16(sizeof(gr_m_pg) - 4),
2639 .descr = {
2640 { .st_enble = 1 },
2641 { .st_enble = 1 },
2642 { .st_enble = 1 },
2643 { .st_enble = 1 },
2644 { .st_enble = 1 },
2645 { .st_enble = 0 },
2646 }
2647 };
2648
2649 BUILD_BUG_ON(sizeof(struct grouping_m_pg) !=
2650 16 + MAXIMUM_NUMBER_OF_STREAMS * 16);
2651 memcpy(p, &gr_m_pg, sizeof(gr_m_pg));
2652 if (1 == pcontrol) {
2653 /* There are no changeable values so clear from byte 4 on. */
2654 memset(p + 4, 0, sizeof(gr_m_pg) - 4);
2655 }
2656 return sizeof(gr_m_pg);
2657}
2658
2659static int resp_iec_m_pg(unsigned char *p, int pcontrol, int target)
2660{ /* Informational Exceptions control mode page for mode_sense */
2661 unsigned char ch_iec_m_pg[] = {/* 0x1c, 0xa, */ 0x4, 0xf, 0, 0, 0, 0,
2662 0, 0, 0x0, 0x0};
2663 unsigned char d_iec_m_pg[] = {0x1c, 0xa, 0x08, 0, 0, 0, 0, 0,
2664 0, 0, 0x0, 0x0};
2665
2666 memcpy(p, iec_m_pg, sizeof(iec_m_pg));
2667 if (1 == pcontrol)
2668 memcpy(p + 2, ch_iec_m_pg, sizeof(ch_iec_m_pg));
2669 else if (2 == pcontrol)
2670 memcpy(p, d_iec_m_pg, sizeof(d_iec_m_pg));
2671 return sizeof(iec_m_pg);
2672}
2673
2674static int resp_sas_sf_m_pg(unsigned char *p, int pcontrol, int target)
2675{ /* SAS SSP mode page - short format for mode_sense */
2676 unsigned char sas_sf_m_pg[] = {0x19, 0x6,
2677 0x6, 0x0, 0x7, 0xd0, 0x0, 0x0};
2678
2679 memcpy(p, sas_sf_m_pg, sizeof(sas_sf_m_pg));
2680 if (1 == pcontrol)
2681 memset(p + 2, 0, sizeof(sas_sf_m_pg) - 2);
2682 return sizeof(sas_sf_m_pg);
2683}
2684
2685
2686static int resp_sas_pcd_m_spg(unsigned char *p, int pcontrol, int target,
2687 int target_dev_id)
2688{ /* SAS phy control and discover mode page for mode_sense */
2689 unsigned char sas_pcd_m_pg[] = {0x59, 0x1, 0, 0x64, 0, 0x6, 0, 2,
2690 0, 0, 0, 0, 0x10, 0x9, 0x8, 0x0,
2691 0, 0, 0, 0, 0, 0, 0, 0, /* insert SAS addr */
2692 0, 0, 0, 0, 0, 0, 0, 0, /* insert SAS addr */
2693 0x2, 0, 0, 0, 0, 0, 0, 0,
2694 0x88, 0x99, 0, 0, 0, 0, 0, 0,
2695 0, 0, 0, 0, 0, 0, 0, 0,
2696 0, 1, 0, 0, 0x10, 0x9, 0x8, 0x0,
2697 0, 0, 0, 0, 0, 0, 0, 0, /* insert SAS addr */
2698 0, 0, 0, 0, 0, 0, 0, 0, /* insert SAS addr */
2699 0x3, 0, 0, 0, 0, 0, 0, 0,
2700 0x88, 0x99, 0, 0, 0, 0, 0, 0,
2701 0, 0, 0, 0, 0, 0, 0, 0,
2702 };
2703 int port_a, port_b;
2704
2705 put_unaligned_be64(naa3_comp_a, sas_pcd_m_pg + 16);
2706 put_unaligned_be64(naa3_comp_c + 1, sas_pcd_m_pg + 24);
2707 put_unaligned_be64(naa3_comp_a, sas_pcd_m_pg + 64);
2708 put_unaligned_be64(naa3_comp_c + 1, sas_pcd_m_pg + 72);
2709 port_a = target_dev_id + 1;
2710 port_b = port_a + 1;
2711 memcpy(p, sas_pcd_m_pg, sizeof(sas_pcd_m_pg));
2712 put_unaligned_be32(port_a, p + 20);
2713 put_unaligned_be32(port_b, p + 48 + 20);
2714 if (1 == pcontrol)
2715 memset(p + 4, 0, sizeof(sas_pcd_m_pg) - 4);
2716 return sizeof(sas_pcd_m_pg);
2717}
2718
2719static int resp_sas_sha_m_spg(unsigned char *p, int pcontrol)
2720{ /* SAS SSP shared protocol specific port mode subpage */
2721 unsigned char sas_sha_m_pg[] = {0x59, 0x2, 0, 0xc, 0, 0x6, 0x10, 0,
2722 0, 0, 0, 0, 0, 0, 0, 0,
2723 };
2724
2725 memcpy(p, sas_sha_m_pg, sizeof(sas_sha_m_pg));
2726 if (1 == pcontrol)
2727 memset(p + 4, 0, sizeof(sas_sha_m_pg) - 4);
2728 return sizeof(sas_sha_m_pg);
2729}
2730
2731/* PAGE_SIZE is more than necessary but provides room for future expansion. */
2732#define SDEBUG_MAX_MSENSE_SZ PAGE_SIZE
2733
2734static int resp_mode_sense(struct scsi_cmnd *scp,
2735 struct sdebug_dev_info *devip)
2736{
2737 int pcontrol, pcode, subpcode, bd_len;
2738 unsigned char dev_spec;
2739 u32 alloc_len, offset, len;
2740 int target_dev_id;
2741 int target = scp->device->id;
2742 unsigned char *ap;
2743 unsigned char *arr __free(kfree);
2744 unsigned char *cmd = scp->cmnd;
2745 bool dbd, llbaa, msense_6, is_disk, is_zbc;
2746
2747 arr = kzalloc(SDEBUG_MAX_MSENSE_SZ, GFP_ATOMIC);
2748 if (!arr)
2749 return -ENOMEM;
2750 dbd = !!(cmd[1] & 0x8); /* disable block descriptors */
2751 pcontrol = (cmd[2] & 0xc0) >> 6;
2752 pcode = cmd[2] & 0x3f;
2753 subpcode = cmd[3];
2754 msense_6 = (MODE_SENSE == cmd[0]);
2755 llbaa = msense_6 ? false : !!(cmd[1] & 0x10);
2756 is_disk = (sdebug_ptype == TYPE_DISK);
2757 is_zbc = devip->zoned;
2758 if ((is_disk || is_zbc) && !dbd)
2759 bd_len = llbaa ? 16 : 8;
2760 else
2761 bd_len = 0;
2762 alloc_len = msense_6 ? cmd[4] : get_unaligned_be16(cmd + 7);
2763 if (0x3 == pcontrol) { /* Saving values not supported */
2764 mk_sense_buffer(scp, ILLEGAL_REQUEST, SAVING_PARAMS_UNSUP, 0);
2765 return check_condition_result;
2766 }
2767 target_dev_id = ((devip->sdbg_host->shost->host_no + 1) * 2000) +
2768 (devip->target * 1000) - 3;
2769 /* for disks+zbc set DPOFUA bit and clear write protect (WP) bit */
2770 if (is_disk || is_zbc) {
2771 dev_spec = 0x10; /* =0x90 if WP=1 implies read-only */
2772 if (sdebug_wp)
2773 dev_spec |= 0x80;
2774 } else
2775 dev_spec = 0x0;
2776 if (msense_6) {
2777 arr[2] = dev_spec;
2778 arr[3] = bd_len;
2779 offset = 4;
2780 } else {
2781 arr[3] = dev_spec;
2782 if (16 == bd_len)
2783 arr[4] = 0x1; /* set LONGLBA bit */
2784 arr[7] = bd_len; /* assume 255 or less */
2785 offset = 8;
2786 }
2787 ap = arr + offset;
2788 if ((bd_len > 0) && (!sdebug_capacity))
2789 sdebug_capacity = get_sdebug_capacity();
2790
2791 if (8 == bd_len) {
2792 if (sdebug_capacity > 0xfffffffe)
2793 put_unaligned_be32(0xffffffff, ap + 0);
2794 else
2795 put_unaligned_be32(sdebug_capacity, ap + 0);
2796 put_unaligned_be16(sdebug_sector_size, ap + 6);
2797 offset += bd_len;
2798 ap = arr + offset;
2799 } else if (16 == bd_len) {
2800 put_unaligned_be64((u64)sdebug_capacity, ap + 0);
2801 put_unaligned_be32(sdebug_sector_size, ap + 12);
2802 offset += bd_len;
2803 ap = arr + offset;
2804 }
2805
2806 /*
2807 * N.B. If len>0 before resp_*_pg() call, then form of that call should be:
2808 * len += resp_*_pg(ap + len, pcontrol, target);
2809 */
2810 switch (pcode) {
2811 case 0x1: /* Read-Write error recovery page, direct access */
2812 if (subpcode > 0x0 && subpcode < 0xff)
2813 goto bad_subpcode;
2814 len = resp_err_recov_pg(ap, pcontrol, target);
2815 offset += len;
2816 break;
2817 case 0x2: /* Disconnect-Reconnect page, all devices */
2818 if (subpcode > 0x0 && subpcode < 0xff)
2819 goto bad_subpcode;
2820 len = resp_disconnect_pg(ap, pcontrol, target);
2821 offset += len;
2822 break;
2823 case 0x3: /* Format device page, direct access */
2824 if (subpcode > 0x0 && subpcode < 0xff)
2825 goto bad_subpcode;
2826 if (is_disk) {
2827 len = resp_format_pg(ap, pcontrol, target);
2828 offset += len;
2829 } else {
2830 goto bad_pcode;
2831 }
2832 break;
2833 case 0x8: /* Caching page, direct access */
2834 if (subpcode > 0x0 && subpcode < 0xff)
2835 goto bad_subpcode;
2836 if (is_disk || is_zbc) {
2837 len = resp_caching_pg(ap, pcontrol, target);
2838 offset += len;
2839 } else {
2840 goto bad_pcode;
2841 }
2842 break;
2843 case 0xa: /* Control Mode page, all devices */
2844 switch (subpcode) {
2845 case 0:
2846 len = resp_ctrl_m_pg(ap, pcontrol, target);
2847 break;
2848 case 0x05:
2849 len = resp_grouping_m_pg(ap, pcontrol, target);
2850 break;
2851 case 0xff:
2852 len = resp_ctrl_m_pg(ap, pcontrol, target);
2853 len += resp_grouping_m_pg(ap + len, pcontrol, target);
2854 break;
2855 default:
2856 goto bad_subpcode;
2857 }
2858 offset += len;
2859 break;
2860 case 0x19: /* if spc==1 then sas phy, control+discover */
2861 if (subpcode > 0x2 && subpcode < 0xff)
2862 goto bad_subpcode;
2863 len = 0;
2864 if ((0x0 == subpcode) || (0xff == subpcode))
2865 len += resp_sas_sf_m_pg(ap + len, pcontrol, target);
2866 if ((0x1 == subpcode) || (0xff == subpcode))
2867 len += resp_sas_pcd_m_spg(ap + len, pcontrol, target,
2868 target_dev_id);
2869 if ((0x2 == subpcode) || (0xff == subpcode))
2870 len += resp_sas_sha_m_spg(ap + len, pcontrol);
2871 offset += len;
2872 break;
2873 case 0x1c: /* Informational Exceptions Mode page, all devices */
2874 if (subpcode > 0x0 && subpcode < 0xff)
2875 goto bad_subpcode;
2876 len = resp_iec_m_pg(ap, pcontrol, target);
2877 offset += len;
2878 break;
2879 case 0x3f: /* Read all Mode pages */
2880 if (subpcode > 0x0 && subpcode < 0xff)
2881 goto bad_subpcode;
2882 len = resp_err_recov_pg(ap, pcontrol, target);
2883 len += resp_disconnect_pg(ap + len, pcontrol, target);
2884 if (is_disk) {
2885 len += resp_format_pg(ap + len, pcontrol, target);
2886 len += resp_caching_pg(ap + len, pcontrol, target);
2887 } else if (is_zbc) {
2888 len += resp_caching_pg(ap + len, pcontrol, target);
2889 }
2890 len += resp_ctrl_m_pg(ap + len, pcontrol, target);
2891 if (0xff == subpcode)
2892 len += resp_grouping_m_pg(ap + len, pcontrol, target);
2893 len += resp_sas_sf_m_pg(ap + len, pcontrol, target);
2894 if (0xff == subpcode) {
2895 len += resp_sas_pcd_m_spg(ap + len, pcontrol, target,
2896 target_dev_id);
2897 len += resp_sas_sha_m_spg(ap + len, pcontrol);
2898 }
2899 len += resp_iec_m_pg(ap + len, pcontrol, target);
2900 offset += len;
2901 break;
2902 default:
2903 goto bad_pcode;
2904 }
2905 if (msense_6)
2906 arr[0] = offset - 1;
2907 else
2908 put_unaligned_be16((offset - 2), arr + 0);
2909 return fill_from_dev_buffer(scp, arr, min_t(u32, alloc_len, offset));
2910
2911bad_pcode:
2912 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 5);
2913 return check_condition_result;
2914
2915bad_subpcode:
2916 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1);
2917 return check_condition_result;
2918}
2919
2920#define SDEBUG_MAX_MSELECT_SZ 512
2921
2922static int resp_mode_select(struct scsi_cmnd *scp,
2923 struct sdebug_dev_info *devip)
2924{
2925 int pf, sp, ps, md_len, bd_len, off, spf, pg_len;
2926 int param_len, res, mpage;
2927 unsigned char arr[SDEBUG_MAX_MSELECT_SZ];
2928 unsigned char *cmd = scp->cmnd;
2929 int mselect6 = (MODE_SELECT == cmd[0]);
2930
2931 memset(arr, 0, sizeof(arr));
2932 pf = cmd[1] & 0x10;
2933 sp = cmd[1] & 0x1;
2934 param_len = mselect6 ? cmd[4] : get_unaligned_be16(cmd + 7);
2935 if ((0 == pf) || sp || (param_len > SDEBUG_MAX_MSELECT_SZ)) {
2936 mk_sense_invalid_fld(scp, SDEB_IN_CDB, mselect6 ? 4 : 7, -1);
2937 return check_condition_result;
2938 }
2939 res = fetch_to_dev_buffer(scp, arr, param_len);
2940 if (-1 == res)
2941 return DID_ERROR << 16;
2942 else if (sdebug_verbose && (res < param_len))
2943 sdev_printk(KERN_INFO, scp->device,
2944 "%s: cdb indicated=%d, IO sent=%d bytes\n",
2945 __func__, param_len, res);
2946 md_len = mselect6 ? (arr[0] + 1) : (get_unaligned_be16(arr + 0) + 2);
2947 bd_len = mselect6 ? arr[3] : get_unaligned_be16(arr + 6);
2948 off = bd_len + (mselect6 ? 4 : 8);
2949 if (md_len > 2 || off >= res) {
2950 mk_sense_invalid_fld(scp, SDEB_IN_DATA, 0, -1);
2951 return check_condition_result;
2952 }
2953 mpage = arr[off] & 0x3f;
2954 ps = !!(arr[off] & 0x80);
2955 if (ps) {
2956 mk_sense_invalid_fld(scp, SDEB_IN_DATA, off, 7);
2957 return check_condition_result;
2958 }
2959 spf = !!(arr[off] & 0x40);
2960 pg_len = spf ? (get_unaligned_be16(arr + off + 2) + 4) :
2961 (arr[off + 1] + 2);
2962 if ((pg_len + off) > param_len) {
2963 mk_sense_buffer(scp, ILLEGAL_REQUEST,
2964 PARAMETER_LIST_LENGTH_ERR, 0);
2965 return check_condition_result;
2966 }
2967 switch (mpage) {
2968 case 0x8: /* Caching Mode page */
2969 if (caching_pg[1] == arr[off + 1]) {
2970 memcpy(caching_pg + 2, arr + off + 2,
2971 sizeof(caching_pg) - 2);
2972 goto set_mode_changed_ua;
2973 }
2974 break;
2975 case 0xa: /* Control Mode page */
2976 if (ctrl_m_pg[1] == arr[off + 1]) {
2977 memcpy(ctrl_m_pg + 2, arr + off + 2,
2978 sizeof(ctrl_m_pg) - 2);
2979 if (ctrl_m_pg[4] & 0x8)
2980 sdebug_wp = true;
2981 else
2982 sdebug_wp = false;
2983 sdebug_dsense = !!(ctrl_m_pg[2] & 0x4);
2984 goto set_mode_changed_ua;
2985 }
2986 break;
2987 case 0x1c: /* Informational Exceptions Mode page */
2988 if (iec_m_pg[1] == arr[off + 1]) {
2989 memcpy(iec_m_pg + 2, arr + off + 2,
2990 sizeof(iec_m_pg) - 2);
2991 goto set_mode_changed_ua;
2992 }
2993 break;
2994 default:
2995 break;
2996 }
2997 mk_sense_invalid_fld(scp, SDEB_IN_DATA, off, 5);
2998 return check_condition_result;
2999set_mode_changed_ua:
3000 set_bit(SDEBUG_UA_MODE_CHANGED, devip->uas_bm);
3001 return 0;
3002}
3003
3004static int resp_temp_l_pg(unsigned char *arr)
3005{
3006 unsigned char temp_l_pg[] = {0x0, 0x0, 0x3, 0x2, 0x0, 38,
3007 0x0, 0x1, 0x3, 0x2, 0x0, 65,
3008 };
3009
3010 memcpy(arr, temp_l_pg, sizeof(temp_l_pg));
3011 return sizeof(temp_l_pg);
3012}
3013
3014static int resp_ie_l_pg(unsigned char *arr)
3015{
3016 unsigned char ie_l_pg[] = {0x0, 0x0, 0x3, 0x3, 0x0, 0x0, 38,
3017 };
3018
3019 memcpy(arr, ie_l_pg, sizeof(ie_l_pg));
3020 if (iec_m_pg[2] & 0x4) { /* TEST bit set */
3021 arr[4] = THRESHOLD_EXCEEDED;
3022 arr[5] = 0xff;
3023 }
3024 return sizeof(ie_l_pg);
3025}
3026
3027static int resp_env_rep_l_spg(unsigned char *arr)
3028{
3029 unsigned char env_rep_l_spg[] = {0x0, 0x0, 0x23, 0x8,
3030 0x0, 40, 72, 0xff, 45, 18, 0, 0,
3031 0x1, 0x0, 0x23, 0x8,
3032 0x0, 55, 72, 35, 55, 45, 0, 0,
3033 };
3034
3035 memcpy(arr, env_rep_l_spg, sizeof(env_rep_l_spg));
3036 return sizeof(env_rep_l_spg);
3037}
3038
3039#define SDEBUG_MAX_LSENSE_SZ 512
3040
3041static int resp_log_sense(struct scsi_cmnd *scp,
3042 struct sdebug_dev_info *devip)
3043{
3044 int ppc, sp, pcode, subpcode;
3045 u32 alloc_len, len, n;
3046 unsigned char arr[SDEBUG_MAX_LSENSE_SZ];
3047 unsigned char *cmd = scp->cmnd;
3048
3049 memset(arr, 0, sizeof(arr));
3050 ppc = cmd[1] & 0x2;
3051 sp = cmd[1] & 0x1;
3052 if (ppc || sp) {
3053 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, ppc ? 1 : 0);
3054 return check_condition_result;
3055 }
3056 pcode = cmd[2] & 0x3f;
3057 subpcode = cmd[3] & 0xff;
3058 alloc_len = get_unaligned_be16(cmd + 7);
3059 arr[0] = pcode;
3060 if (0 == subpcode) {
3061 switch (pcode) {
3062 case 0x0: /* Supported log pages log page */
3063 n = 4;
3064 arr[n++] = 0x0; /* this page */
3065 arr[n++] = 0xd; /* Temperature */
3066 arr[n++] = 0x2f; /* Informational exceptions */
3067 arr[3] = n - 4;
3068 break;
3069 case 0xd: /* Temperature log page */
3070 arr[3] = resp_temp_l_pg(arr + 4);
3071 break;
3072 case 0x2f: /* Informational exceptions log page */
3073 arr[3] = resp_ie_l_pg(arr + 4);
3074 break;
3075 default:
3076 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 5);
3077 return check_condition_result;
3078 }
3079 } else if (0xff == subpcode) {
3080 arr[0] |= 0x40;
3081 arr[1] = subpcode;
3082 switch (pcode) {
3083 case 0x0: /* Supported log pages and subpages log page */
3084 n = 4;
3085 arr[n++] = 0x0;
3086 arr[n++] = 0x0; /* 0,0 page */
3087 arr[n++] = 0x0;
3088 arr[n++] = 0xff; /* this page */
3089 arr[n++] = 0xd;
3090 arr[n++] = 0x0; /* Temperature */
3091 arr[n++] = 0xd;
3092 arr[n++] = 0x1; /* Environment reporting */
3093 arr[n++] = 0xd;
3094 arr[n++] = 0xff; /* all 0xd subpages */
3095 arr[n++] = 0x2f;
3096 arr[n++] = 0x0; /* Informational exceptions */
3097 arr[n++] = 0x2f;
3098 arr[n++] = 0xff; /* all 0x2f subpages */
3099 arr[3] = n - 4;
3100 break;
3101 case 0xd: /* Temperature subpages */
3102 n = 4;
3103 arr[n++] = 0xd;
3104 arr[n++] = 0x0; /* Temperature */
3105 arr[n++] = 0xd;
3106 arr[n++] = 0x1; /* Environment reporting */
3107 arr[n++] = 0xd;
3108 arr[n++] = 0xff; /* these subpages */
3109 arr[3] = n - 4;
3110 break;
3111 case 0x2f: /* Informational exceptions subpages */
3112 n = 4;
3113 arr[n++] = 0x2f;
3114 arr[n++] = 0x0; /* Informational exceptions */
3115 arr[n++] = 0x2f;
3116 arr[n++] = 0xff; /* these subpages */
3117 arr[3] = n - 4;
3118 break;
3119 default:
3120 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 5);
3121 return check_condition_result;
3122 }
3123 } else if (subpcode > 0) {
3124 arr[0] |= 0x40;
3125 arr[1] = subpcode;
3126 if (pcode == 0xd && subpcode == 1)
3127 arr[3] = resp_env_rep_l_spg(arr + 4);
3128 else {
3129 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 5);
3130 return check_condition_result;
3131 }
3132 } else {
3133 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1);
3134 return check_condition_result;
3135 }
3136 len = min_t(u32, get_unaligned_be16(arr + 2) + 4, alloc_len);
3137 return fill_from_dev_buffer(scp, arr,
3138 min_t(u32, len, SDEBUG_MAX_INQ_ARR_SZ));
3139}
3140
3141static inline bool sdebug_dev_is_zoned(struct sdebug_dev_info *devip)
3142{
3143 return devip->nr_zones != 0;
3144}
3145
3146static struct sdeb_zone_state *zbc_zone(struct sdebug_dev_info *devip,
3147 unsigned long long lba)
3148{
3149 u32 zno = lba >> devip->zsize_shift;
3150 struct sdeb_zone_state *zsp;
3151
3152 if (devip->zcap == devip->zsize || zno < devip->nr_conv_zones)
3153 return &devip->zstate[zno];
3154
3155 /*
3156 * If the zone capacity is less than the zone size, adjust for gap
3157 * zones.
3158 */
3159 zno = 2 * zno - devip->nr_conv_zones;
3160 WARN_ONCE(zno >= devip->nr_zones, "%u > %u\n", zno, devip->nr_zones);
3161 zsp = &devip->zstate[zno];
3162 if (lba >= zsp->z_start + zsp->z_size)
3163 zsp++;
3164 WARN_ON_ONCE(lba >= zsp->z_start + zsp->z_size);
3165 return zsp;
3166}
3167
3168static inline bool zbc_zone_is_conv(struct sdeb_zone_state *zsp)
3169{
3170 return zsp->z_type == ZBC_ZTYPE_CNV;
3171}
3172
3173static inline bool zbc_zone_is_gap(struct sdeb_zone_state *zsp)
3174{
3175 return zsp->z_type == ZBC_ZTYPE_GAP;
3176}
3177
3178static inline bool zbc_zone_is_seq(struct sdeb_zone_state *zsp)
3179{
3180 return !zbc_zone_is_conv(zsp) && !zbc_zone_is_gap(zsp);
3181}
3182
3183static void zbc_close_zone(struct sdebug_dev_info *devip,
3184 struct sdeb_zone_state *zsp)
3185{
3186 enum sdebug_z_cond zc;
3187
3188 if (!zbc_zone_is_seq(zsp))
3189 return;
3190
3191 zc = zsp->z_cond;
3192 if (!(zc == ZC2_IMPLICIT_OPEN || zc == ZC3_EXPLICIT_OPEN))
3193 return;
3194
3195 if (zc == ZC2_IMPLICIT_OPEN)
3196 devip->nr_imp_open--;
3197 else
3198 devip->nr_exp_open--;
3199
3200 if (zsp->z_wp == zsp->z_start) {
3201 zsp->z_cond = ZC1_EMPTY;
3202 } else {
3203 zsp->z_cond = ZC4_CLOSED;
3204 devip->nr_closed++;
3205 }
3206}
3207
3208static void zbc_close_imp_open_zone(struct sdebug_dev_info *devip)
3209{
3210 struct sdeb_zone_state *zsp = &devip->zstate[0];
3211 unsigned int i;
3212
3213 for (i = 0; i < devip->nr_zones; i++, zsp++) {
3214 if (zsp->z_cond == ZC2_IMPLICIT_OPEN) {
3215 zbc_close_zone(devip, zsp);
3216 return;
3217 }
3218 }
3219}
3220
3221static void zbc_open_zone(struct sdebug_dev_info *devip,
3222 struct sdeb_zone_state *zsp, bool explicit)
3223{
3224 enum sdebug_z_cond zc;
3225
3226 if (!zbc_zone_is_seq(zsp))
3227 return;
3228
3229 zc = zsp->z_cond;
3230 if ((explicit && zc == ZC3_EXPLICIT_OPEN) ||
3231 (!explicit && zc == ZC2_IMPLICIT_OPEN))
3232 return;
3233
3234 /* Close an implicit open zone if necessary */
3235 if (explicit && zsp->z_cond == ZC2_IMPLICIT_OPEN)
3236 zbc_close_zone(devip, zsp);
3237 else if (devip->max_open &&
3238 devip->nr_imp_open + devip->nr_exp_open >= devip->max_open)
3239 zbc_close_imp_open_zone(devip);
3240
3241 if (zsp->z_cond == ZC4_CLOSED)
3242 devip->nr_closed--;
3243 if (explicit) {
3244 zsp->z_cond = ZC3_EXPLICIT_OPEN;
3245 devip->nr_exp_open++;
3246 } else {
3247 zsp->z_cond = ZC2_IMPLICIT_OPEN;
3248 devip->nr_imp_open++;
3249 }
3250}
3251
3252static inline void zbc_set_zone_full(struct sdebug_dev_info *devip,
3253 struct sdeb_zone_state *zsp)
3254{
3255 switch (zsp->z_cond) {
3256 case ZC2_IMPLICIT_OPEN:
3257 devip->nr_imp_open--;
3258 break;
3259 case ZC3_EXPLICIT_OPEN:
3260 devip->nr_exp_open--;
3261 break;
3262 default:
3263 WARN_ONCE(true, "Invalid zone %llu condition %x\n",
3264 zsp->z_start, zsp->z_cond);
3265 break;
3266 }
3267 zsp->z_cond = ZC5_FULL;
3268}
3269
3270static void zbc_inc_wp(struct sdebug_dev_info *devip,
3271 unsigned long long lba, unsigned int num)
3272{
3273 struct sdeb_zone_state *zsp = zbc_zone(devip, lba);
3274 unsigned long long n, end, zend = zsp->z_start + zsp->z_size;
3275
3276 if (!zbc_zone_is_seq(zsp))
3277 return;
3278
3279 if (zsp->z_type == ZBC_ZTYPE_SWR) {
3280 zsp->z_wp += num;
3281 if (zsp->z_wp >= zend)
3282 zbc_set_zone_full(devip, zsp);
3283 return;
3284 }
3285
3286 while (num) {
3287 if (lba != zsp->z_wp)
3288 zsp->z_non_seq_resource = true;
3289
3290 end = lba + num;
3291 if (end >= zend) {
3292 n = zend - lba;
3293 zsp->z_wp = zend;
3294 } else if (end > zsp->z_wp) {
3295 n = num;
3296 zsp->z_wp = end;
3297 } else {
3298 n = num;
3299 }
3300 if (zsp->z_wp >= zend)
3301 zbc_set_zone_full(devip, zsp);
3302
3303 num -= n;
3304 lba += n;
3305 if (num) {
3306 zsp++;
3307 zend = zsp->z_start + zsp->z_size;
3308 }
3309 }
3310}
3311
3312static int check_zbc_access_params(struct scsi_cmnd *scp,
3313 unsigned long long lba, unsigned int num, bool write)
3314{
3315 struct scsi_device *sdp = scp->device;
3316 struct sdebug_dev_info *devip = (struct sdebug_dev_info *)sdp->hostdata;
3317 struct sdeb_zone_state *zsp = zbc_zone(devip, lba);
3318 struct sdeb_zone_state *zsp_end = zbc_zone(devip, lba + num - 1);
3319
3320 if (!write) {
3321 /* For host-managed, reads cannot cross zone types boundaries */
3322 if (zsp->z_type != zsp_end->z_type) {
3323 mk_sense_buffer(scp, ILLEGAL_REQUEST,
3324 LBA_OUT_OF_RANGE,
3325 READ_INVDATA_ASCQ);
3326 return check_condition_result;
3327 }
3328 return 0;
3329 }
3330
3331 /* Writing into a gap zone is not allowed */
3332 if (zbc_zone_is_gap(zsp)) {
3333 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE,
3334 ATTEMPT_ACCESS_GAP);
3335 return check_condition_result;
3336 }
3337
3338 /* No restrictions for writes within conventional zones */
3339 if (zbc_zone_is_conv(zsp)) {
3340 if (!zbc_zone_is_conv(zsp_end)) {
3341 mk_sense_buffer(scp, ILLEGAL_REQUEST,
3342 LBA_OUT_OF_RANGE,
3343 WRITE_BOUNDARY_ASCQ);
3344 return check_condition_result;
3345 }
3346 return 0;
3347 }
3348
3349 if (zsp->z_type == ZBC_ZTYPE_SWR) {
3350 /* Writes cannot cross sequential zone boundaries */
3351 if (zsp_end != zsp) {
3352 mk_sense_buffer(scp, ILLEGAL_REQUEST,
3353 LBA_OUT_OF_RANGE,
3354 WRITE_BOUNDARY_ASCQ);
3355 return check_condition_result;
3356 }
3357 /* Cannot write full zones */
3358 if (zsp->z_cond == ZC5_FULL) {
3359 mk_sense_buffer(scp, ILLEGAL_REQUEST,
3360 INVALID_FIELD_IN_CDB, 0);
3361 return check_condition_result;
3362 }
3363 /* Writes must be aligned to the zone WP */
3364 if (lba != zsp->z_wp) {
3365 mk_sense_buffer(scp, ILLEGAL_REQUEST,
3366 LBA_OUT_OF_RANGE,
3367 UNALIGNED_WRITE_ASCQ);
3368 return check_condition_result;
3369 }
3370 }
3371
3372 /* Handle implicit open of closed and empty zones */
3373 if (zsp->z_cond == ZC1_EMPTY || zsp->z_cond == ZC4_CLOSED) {
3374 if (devip->max_open &&
3375 devip->nr_exp_open >= devip->max_open) {
3376 mk_sense_buffer(scp, DATA_PROTECT,
3377 INSUFF_RES_ASC,
3378 INSUFF_ZONE_ASCQ);
3379 return check_condition_result;
3380 }
3381 zbc_open_zone(devip, zsp, false);
3382 }
3383
3384 return 0;
3385}
3386
3387static inline int check_device_access_params
3388 (struct scsi_cmnd *scp, unsigned long long lba,
3389 unsigned int num, bool write)
3390{
3391 struct scsi_device *sdp = scp->device;
3392 struct sdebug_dev_info *devip = (struct sdebug_dev_info *)sdp->hostdata;
3393
3394 if (lba + num > sdebug_capacity) {
3395 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
3396 return check_condition_result;
3397 }
3398 /* transfer length excessive (tie in to block limits VPD page) */
3399 if (num > sdebug_store_sectors) {
3400 /* needs work to find which cdb byte 'num' comes from */
3401 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
3402 return check_condition_result;
3403 }
3404 if (write && unlikely(sdebug_wp)) {
3405 mk_sense_buffer(scp, DATA_PROTECT, WRITE_PROTECTED, 0x2);
3406 return check_condition_result;
3407 }
3408 if (sdebug_dev_is_zoned(devip))
3409 return check_zbc_access_params(scp, lba, num, write);
3410
3411 return 0;
3412}
3413
3414/*
3415 * Note: if BUG_ON() fires it usually indicates a problem with the parser
3416 * tables. Perhaps a missing F_FAKE_RW or FF_MEDIA_IO flag. Response functions
3417 * that access any of the "stores" in struct sdeb_store_info should call this
3418 * function with bug_if_fake_rw set to true.
3419 */
3420static inline struct sdeb_store_info *devip2sip(struct sdebug_dev_info *devip,
3421 bool bug_if_fake_rw)
3422{
3423 if (sdebug_fake_rw) {
3424 BUG_ON(bug_if_fake_rw); /* See note above */
3425 return NULL;
3426 }
3427 return xa_load(per_store_ap, devip->sdbg_host->si_idx);
3428}
3429
3430static inline void
3431sdeb_read_lock(rwlock_t *lock)
3432{
3433 if (sdebug_no_rwlock)
3434 __acquire(lock);
3435 else
3436 read_lock(lock);
3437}
3438
3439static inline void
3440sdeb_read_unlock(rwlock_t *lock)
3441{
3442 if (sdebug_no_rwlock)
3443 __release(lock);
3444 else
3445 read_unlock(lock);
3446}
3447
3448static inline void
3449sdeb_write_lock(rwlock_t *lock)
3450{
3451 if (sdebug_no_rwlock)
3452 __acquire(lock);
3453 else
3454 write_lock(lock);
3455}
3456
3457static inline void
3458sdeb_write_unlock(rwlock_t *lock)
3459{
3460 if (sdebug_no_rwlock)
3461 __release(lock);
3462 else
3463 write_unlock(lock);
3464}
3465
3466static inline void
3467sdeb_data_read_lock(struct sdeb_store_info *sip)
3468{
3469 BUG_ON(!sip);
3470
3471 sdeb_read_lock(&sip->macc_data_lck);
3472}
3473
3474static inline void
3475sdeb_data_read_unlock(struct sdeb_store_info *sip)
3476{
3477 BUG_ON(!sip);
3478
3479 sdeb_read_unlock(&sip->macc_data_lck);
3480}
3481
3482static inline void
3483sdeb_data_write_lock(struct sdeb_store_info *sip)
3484{
3485 BUG_ON(!sip);
3486
3487 sdeb_write_lock(&sip->macc_data_lck);
3488}
3489
3490static inline void
3491sdeb_data_write_unlock(struct sdeb_store_info *sip)
3492{
3493 BUG_ON(!sip);
3494
3495 sdeb_write_unlock(&sip->macc_data_lck);
3496}
3497
3498static inline void
3499sdeb_data_sector_read_lock(struct sdeb_store_info *sip)
3500{
3501 BUG_ON(!sip);
3502
3503 sdeb_read_lock(&sip->macc_sector_lck);
3504}
3505
3506static inline void
3507sdeb_data_sector_read_unlock(struct sdeb_store_info *sip)
3508{
3509 BUG_ON(!sip);
3510
3511 sdeb_read_unlock(&sip->macc_sector_lck);
3512}
3513
3514static inline void
3515sdeb_data_sector_write_lock(struct sdeb_store_info *sip)
3516{
3517 BUG_ON(!sip);
3518
3519 sdeb_write_lock(&sip->macc_sector_lck);
3520}
3521
3522static inline void
3523sdeb_data_sector_write_unlock(struct sdeb_store_info *sip)
3524{
3525 BUG_ON(!sip);
3526
3527 sdeb_write_unlock(&sip->macc_sector_lck);
3528}
3529
3530/*
3531 * Atomic locking:
3532 * We simplify the atomic model to allow only 1x atomic write and many non-
3533 * atomic reads or writes for all LBAs.
3534
3535 * A RW lock has a similar bahaviour:
3536 * Only 1x writer and many readers.
3537
3538 * So use a RW lock for per-device read and write locking:
3539 * An atomic access grabs the lock as a writer and non-atomic grabs the lock
3540 * as a reader.
3541 */
3542
3543static inline void
3544sdeb_data_lock(struct sdeb_store_info *sip, bool atomic)
3545{
3546 if (atomic)
3547 sdeb_data_write_lock(sip);
3548 else
3549 sdeb_data_read_lock(sip);
3550}
3551
3552static inline void
3553sdeb_data_unlock(struct sdeb_store_info *sip, bool atomic)
3554{
3555 if (atomic)
3556 sdeb_data_write_unlock(sip);
3557 else
3558 sdeb_data_read_unlock(sip);
3559}
3560
3561/* Allow many reads but only 1x write per sector */
3562static inline void
3563sdeb_data_sector_lock(struct sdeb_store_info *sip, bool do_write)
3564{
3565 if (do_write)
3566 sdeb_data_sector_write_lock(sip);
3567 else
3568 sdeb_data_sector_read_lock(sip);
3569}
3570
3571static inline void
3572sdeb_data_sector_unlock(struct sdeb_store_info *sip, bool do_write)
3573{
3574 if (do_write)
3575 sdeb_data_sector_write_unlock(sip);
3576 else
3577 sdeb_data_sector_read_unlock(sip);
3578}
3579
3580static inline void
3581sdeb_meta_read_lock(struct sdeb_store_info *sip)
3582{
3583 if (sdebug_no_rwlock) {
3584 if (sip)
3585 __acquire(&sip->macc_meta_lck);
3586 else
3587 __acquire(&sdeb_fake_rw_lck);
3588 } else {
3589 if (sip)
3590 read_lock(&sip->macc_meta_lck);
3591 else
3592 read_lock(&sdeb_fake_rw_lck);
3593 }
3594}
3595
3596static inline void
3597sdeb_meta_read_unlock(struct sdeb_store_info *sip)
3598{
3599 if (sdebug_no_rwlock) {
3600 if (sip)
3601 __release(&sip->macc_meta_lck);
3602 else
3603 __release(&sdeb_fake_rw_lck);
3604 } else {
3605 if (sip)
3606 read_unlock(&sip->macc_meta_lck);
3607 else
3608 read_unlock(&sdeb_fake_rw_lck);
3609 }
3610}
3611
3612static inline void
3613sdeb_meta_write_lock(struct sdeb_store_info *sip)
3614{
3615 if (sdebug_no_rwlock) {
3616 if (sip)
3617 __acquire(&sip->macc_meta_lck);
3618 else
3619 __acquire(&sdeb_fake_rw_lck);
3620 } else {
3621 if (sip)
3622 write_lock(&sip->macc_meta_lck);
3623 else
3624 write_lock(&sdeb_fake_rw_lck);
3625 }
3626}
3627
3628static inline void
3629sdeb_meta_write_unlock(struct sdeb_store_info *sip)
3630{
3631 if (sdebug_no_rwlock) {
3632 if (sip)
3633 __release(&sip->macc_meta_lck);
3634 else
3635 __release(&sdeb_fake_rw_lck);
3636 } else {
3637 if (sip)
3638 write_unlock(&sip->macc_meta_lck);
3639 else
3640 write_unlock(&sdeb_fake_rw_lck);
3641 }
3642}
3643
3644/* Returns number of bytes copied or -1 if error. */
3645static int do_device_access(struct sdeb_store_info *sip, struct scsi_cmnd *scp,
3646 u32 sg_skip, u64 lba, u32 num, u8 group_number,
3647 bool do_write, bool atomic)
3648{
3649 int ret;
3650 u64 block;
3651 enum dma_data_direction dir;
3652 struct scsi_data_buffer *sdb = &scp->sdb;
3653 u8 *fsp;
3654 int i, total = 0;
3655
3656 /*
3657 * Even though reads are inherently atomic (in this driver), we expect
3658 * the atomic flag only for writes.
3659 */
3660 if (!do_write && atomic)
3661 return -1;
3662
3663 if (do_write) {
3664 dir = DMA_TO_DEVICE;
3665 write_since_sync = true;
3666 } else {
3667 dir = DMA_FROM_DEVICE;
3668 }
3669
3670 if (!sdb->length || !sip)
3671 return 0;
3672 if (scp->sc_data_direction != dir)
3673 return -1;
3674
3675 if (do_write && group_number < ARRAY_SIZE(writes_by_group_number))
3676 atomic_long_inc(&writes_by_group_number[group_number]);
3677
3678 fsp = sip->storep;
3679
3680 block = do_div(lba, sdebug_store_sectors);
3681
3682 /* Only allow 1x atomic write or multiple non-atomic writes at any given time */
3683 sdeb_data_lock(sip, atomic);
3684 for (i = 0; i < num; i++) {
3685 /* We shouldn't need to lock for atomic writes, but do it anyway */
3686 sdeb_data_sector_lock(sip, do_write);
3687 ret = sg_copy_buffer(sdb->table.sgl, sdb->table.nents,
3688 fsp + (block * sdebug_sector_size),
3689 sdebug_sector_size, sg_skip, do_write);
3690 sdeb_data_sector_unlock(sip, do_write);
3691 total += ret;
3692 if (ret != sdebug_sector_size)
3693 break;
3694 sg_skip += sdebug_sector_size;
3695 if (++block >= sdebug_store_sectors)
3696 block = 0;
3697 }
3698 sdeb_data_unlock(sip, atomic);
3699
3700 return total;
3701}
3702
3703/* Returns number of bytes copied or -1 if error. */
3704static int do_dout_fetch(struct scsi_cmnd *scp, u32 num, u8 *doutp)
3705{
3706 struct scsi_data_buffer *sdb = &scp->sdb;
3707
3708 if (!sdb->length)
3709 return 0;
3710 if (scp->sc_data_direction != DMA_TO_DEVICE)
3711 return -1;
3712 return sg_copy_buffer(sdb->table.sgl, sdb->table.nents, doutp,
3713 num * sdebug_sector_size, 0, true);
3714}
3715
3716/* If sip->storep+lba compares equal to arr(num), then copy top half of
3717 * arr into sip->storep+lba and return true. If comparison fails then
3718 * return false. */
3719static bool comp_write_worker(struct sdeb_store_info *sip, u64 lba, u32 num,
3720 const u8 *arr, bool compare_only)
3721{
3722 bool res;
3723 u64 block, rest = 0;
3724 u32 store_blks = sdebug_store_sectors;
3725 u32 lb_size = sdebug_sector_size;
3726 u8 *fsp = sip->storep;
3727
3728 block = do_div(lba, store_blks);
3729 if (block + num > store_blks)
3730 rest = block + num - store_blks;
3731
3732 res = !memcmp(fsp + (block * lb_size), arr, (num - rest) * lb_size);
3733 if (!res)
3734 return res;
3735 if (rest)
3736 res = memcmp(fsp, arr + ((num - rest) * lb_size),
3737 rest * lb_size);
3738 if (!res)
3739 return res;
3740 if (compare_only)
3741 return true;
3742 arr += num * lb_size;
3743 memcpy(fsp + (block * lb_size), arr, (num - rest) * lb_size);
3744 if (rest)
3745 memcpy(fsp, arr + ((num - rest) * lb_size), rest * lb_size);
3746 return res;
3747}
3748
3749static __be16 dif_compute_csum(const void *buf, int len)
3750{
3751 __be16 csum;
3752
3753 if (sdebug_guard)
3754 csum = (__force __be16)ip_compute_csum(buf, len);
3755 else
3756 csum = cpu_to_be16(crc_t10dif(buf, len));
3757
3758 return csum;
3759}
3760
3761static int dif_verify(struct t10_pi_tuple *sdt, const void *data,
3762 sector_t sector, u32 ei_lba)
3763{
3764 __be16 csum = dif_compute_csum(data, sdebug_sector_size);
3765
3766 if (sdt->guard_tag != csum) {
3767 pr_err("GUARD check failed on sector %lu rcvd 0x%04x, data 0x%04x\n",
3768 (unsigned long)sector,
3769 be16_to_cpu(sdt->guard_tag),
3770 be16_to_cpu(csum));
3771 return 0x01;
3772 }
3773 if (sdebug_dif == T10_PI_TYPE1_PROTECTION &&
3774 be32_to_cpu(sdt->ref_tag) != (sector & 0xffffffff)) {
3775 pr_err("REF check failed on sector %lu\n",
3776 (unsigned long)sector);
3777 return 0x03;
3778 }
3779 if (sdebug_dif == T10_PI_TYPE2_PROTECTION &&
3780 be32_to_cpu(sdt->ref_tag) != ei_lba) {
3781 pr_err("REF check failed on sector %lu\n",
3782 (unsigned long)sector);
3783 return 0x03;
3784 }
3785 return 0;
3786}
3787
3788static void dif_copy_prot(struct scsi_cmnd *scp, sector_t sector,
3789 unsigned int sectors, bool read)
3790{
3791 size_t resid;
3792 void *paddr;
3793 struct sdeb_store_info *sip = devip2sip((struct sdebug_dev_info *)
3794 scp->device->hostdata, true);
3795 struct t10_pi_tuple *dif_storep = sip->dif_storep;
3796 const void *dif_store_end = dif_storep + sdebug_store_sectors;
3797 struct sg_mapping_iter miter;
3798
3799 /* Bytes of protection data to copy into sgl */
3800 resid = sectors * sizeof(*dif_storep);
3801
3802 sg_miter_start(&miter, scsi_prot_sglist(scp),
3803 scsi_prot_sg_count(scp), SG_MITER_ATOMIC |
3804 (read ? SG_MITER_TO_SG : SG_MITER_FROM_SG));
3805
3806 while (sg_miter_next(&miter) && resid > 0) {
3807 size_t len = min_t(size_t, miter.length, resid);
3808 void *start = dif_store(sip, sector);
3809 size_t rest = 0;
3810
3811 if (dif_store_end < start + len)
3812 rest = start + len - dif_store_end;
3813
3814 paddr = miter.addr;
3815
3816 if (read)
3817 memcpy(paddr, start, len - rest);
3818 else
3819 memcpy(start, paddr, len - rest);
3820
3821 if (rest) {
3822 if (read)
3823 memcpy(paddr + len - rest, dif_storep, rest);
3824 else
3825 memcpy(dif_storep, paddr + len - rest, rest);
3826 }
3827
3828 sector += len / sizeof(*dif_storep);
3829 resid -= len;
3830 }
3831 sg_miter_stop(&miter);
3832}
3833
3834static int prot_verify_read(struct scsi_cmnd *scp, sector_t start_sec,
3835 unsigned int sectors, u32 ei_lba)
3836{
3837 int ret = 0;
3838 unsigned int i;
3839 sector_t sector;
3840 struct sdeb_store_info *sip = devip2sip((struct sdebug_dev_info *)
3841 scp->device->hostdata, true);
3842 struct t10_pi_tuple *sdt;
3843
3844 for (i = 0; i < sectors; i++, ei_lba++) {
3845 sector = start_sec + i;
3846 sdt = dif_store(sip, sector);
3847
3848 if (sdt->app_tag == cpu_to_be16(0xffff))
3849 continue;
3850
3851 /*
3852 * Because scsi_debug acts as both initiator and
3853 * target we proceed to verify the PI even if
3854 * RDPROTECT=3. This is done so the "initiator" knows
3855 * which type of error to return. Otherwise we would
3856 * have to iterate over the PI twice.
3857 */
3858 if (scp->cmnd[1] >> 5) { /* RDPROTECT */
3859 ret = dif_verify(sdt, lba2fake_store(sip, sector),
3860 sector, ei_lba);
3861 if (ret) {
3862 dif_errors++;
3863 break;
3864 }
3865 }
3866 }
3867
3868 dif_copy_prot(scp, start_sec, sectors, true);
3869 dix_reads++;
3870
3871 return ret;
3872}
3873
3874static int resp_read_dt0(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
3875{
3876 bool check_prot;
3877 u32 num;
3878 u32 ei_lba;
3879 int ret;
3880 u64 lba;
3881 struct sdeb_store_info *sip = devip2sip(devip, true);
3882 u8 *cmd = scp->cmnd;
3883 bool meta_data_locked = false;
3884
3885 switch (cmd[0]) {
3886 case READ_16:
3887 ei_lba = 0;
3888 lba = get_unaligned_be64(cmd + 2);
3889 num = get_unaligned_be32(cmd + 10);
3890 check_prot = true;
3891 break;
3892 case READ_10:
3893 ei_lba = 0;
3894 lba = get_unaligned_be32(cmd + 2);
3895 num = get_unaligned_be16(cmd + 7);
3896 check_prot = true;
3897 break;
3898 case READ_6:
3899 ei_lba = 0;
3900 lba = (u32)cmd[3] | (u32)cmd[2] << 8 |
3901 (u32)(cmd[1] & 0x1f) << 16;
3902 num = (0 == cmd[4]) ? 256 : cmd[4];
3903 check_prot = true;
3904 break;
3905 case READ_12:
3906 ei_lba = 0;
3907 lba = get_unaligned_be32(cmd + 2);
3908 num = get_unaligned_be32(cmd + 6);
3909 check_prot = true;
3910 break;
3911 case XDWRITEREAD_10:
3912 ei_lba = 0;
3913 lba = get_unaligned_be32(cmd + 2);
3914 num = get_unaligned_be16(cmd + 7);
3915 check_prot = false;
3916 break;
3917 default: /* assume READ(32) */
3918 lba = get_unaligned_be64(cmd + 12);
3919 ei_lba = get_unaligned_be32(cmd + 20);
3920 num = get_unaligned_be32(cmd + 28);
3921 check_prot = false;
3922 break;
3923 }
3924 if (unlikely(have_dif_prot && check_prot)) {
3925 if (sdebug_dif == T10_PI_TYPE2_PROTECTION &&
3926 (cmd[1] & 0xe0)) {
3927 mk_sense_invalid_opcode(scp);
3928 return check_condition_result;
3929 }
3930 if ((sdebug_dif == T10_PI_TYPE1_PROTECTION ||
3931 sdebug_dif == T10_PI_TYPE3_PROTECTION) &&
3932 (cmd[1] & 0xe0) == 0)
3933 sdev_printk(KERN_ERR, scp->device, "Unprotected RD "
3934 "to DIF device\n");
3935 }
3936 if (unlikely((sdebug_opts & SDEBUG_OPT_SHORT_TRANSFER) &&
3937 atomic_read(&sdeb_inject_pending))) {
3938 num /= 2;
3939 atomic_set(&sdeb_inject_pending, 0);
3940 }
3941
3942 /*
3943 * When checking device access params, for reads we only check data
3944 * versus what is set at init time, so no need to lock.
3945 */
3946 ret = check_device_access_params(scp, lba, num, false);
3947 if (ret)
3948 return ret;
3949 if (unlikely((SDEBUG_OPT_MEDIUM_ERR & sdebug_opts) &&
3950 (lba <= (sdebug_medium_error_start + sdebug_medium_error_count - 1)) &&
3951 ((lba + num) > sdebug_medium_error_start))) {
3952 /* claim unrecoverable read error */
3953 mk_sense_buffer(scp, MEDIUM_ERROR, UNRECOVERED_READ_ERR, 0);
3954 /* set info field and valid bit for fixed descriptor */
3955 if (0x70 == (scp->sense_buffer[0] & 0x7f)) {
3956 scp->sense_buffer[0] |= 0x80; /* Valid bit */
3957 ret = (lba < OPT_MEDIUM_ERR_ADDR)
3958 ? OPT_MEDIUM_ERR_ADDR : (int)lba;
3959 put_unaligned_be32(ret, scp->sense_buffer + 3);
3960 }
3961 scsi_set_resid(scp, scsi_bufflen(scp));
3962 return check_condition_result;
3963 }
3964
3965 if (sdebug_dev_is_zoned(devip) ||
3966 (sdebug_dix && scsi_prot_sg_count(scp))) {
3967 sdeb_meta_read_lock(sip);
3968 meta_data_locked = true;
3969 }
3970
3971 /* DIX + T10 DIF */
3972 if (unlikely(sdebug_dix && scsi_prot_sg_count(scp))) {
3973 switch (prot_verify_read(scp, lba, num, ei_lba)) {
3974 case 1: /* Guard tag error */
3975 if (cmd[1] >> 5 != 3) { /* RDPROTECT != 3 */
3976 sdeb_meta_read_unlock(sip);
3977 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 1);
3978 return check_condition_result;
3979 } else if (scp->prot_flags & SCSI_PROT_GUARD_CHECK) {
3980 sdeb_meta_read_unlock(sip);
3981 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 1);
3982 return illegal_condition_result;
3983 }
3984 break;
3985 case 3: /* Reference tag error */
3986 if (cmd[1] >> 5 != 3) { /* RDPROTECT != 3 */
3987 sdeb_meta_read_unlock(sip);
3988 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 3);
3989 return check_condition_result;
3990 } else if (scp->prot_flags & SCSI_PROT_REF_CHECK) {
3991 sdeb_meta_read_unlock(sip);
3992 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 3);
3993 return illegal_condition_result;
3994 }
3995 break;
3996 }
3997 }
3998
3999 ret = do_device_access(sip, scp, 0, lba, num, 0, false, false);
4000 if (meta_data_locked)
4001 sdeb_meta_read_unlock(sip);
4002 if (unlikely(ret == -1))
4003 return DID_ERROR << 16;
4004
4005 scsi_set_resid(scp, scsi_bufflen(scp) - ret);
4006
4007 if (unlikely((sdebug_opts & SDEBUG_OPT_RECOV_DIF_DIX) &&
4008 atomic_read(&sdeb_inject_pending))) {
4009 if (sdebug_opts & SDEBUG_OPT_RECOVERED_ERR) {
4010 mk_sense_buffer(scp, RECOVERED_ERROR, THRESHOLD_EXCEEDED, 0);
4011 atomic_set(&sdeb_inject_pending, 0);
4012 return check_condition_result;
4013 } else if (sdebug_opts & SDEBUG_OPT_DIF_ERR) {
4014 /* Logical block guard check failed */
4015 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 1);
4016 atomic_set(&sdeb_inject_pending, 0);
4017 return illegal_condition_result;
4018 } else if (SDEBUG_OPT_DIX_ERR & sdebug_opts) {
4019 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 1);
4020 atomic_set(&sdeb_inject_pending, 0);
4021 return illegal_condition_result;
4022 }
4023 }
4024 return 0;
4025}
4026
4027static int prot_verify_write(struct scsi_cmnd *SCpnt, sector_t start_sec,
4028 unsigned int sectors, u32 ei_lba)
4029{
4030 int ret;
4031 struct t10_pi_tuple *sdt;
4032 void *daddr;
4033 sector_t sector = start_sec;
4034 int ppage_offset;
4035 int dpage_offset;
4036 struct sg_mapping_iter diter;
4037 struct sg_mapping_iter piter;
4038
4039 BUG_ON(scsi_sg_count(SCpnt) == 0);
4040 BUG_ON(scsi_prot_sg_count(SCpnt) == 0);
4041
4042 sg_miter_start(&piter, scsi_prot_sglist(SCpnt),
4043 scsi_prot_sg_count(SCpnt),
4044 SG_MITER_ATOMIC | SG_MITER_FROM_SG);
4045 sg_miter_start(&diter, scsi_sglist(SCpnt), scsi_sg_count(SCpnt),
4046 SG_MITER_ATOMIC | SG_MITER_FROM_SG);
4047
4048 /* For each protection page */
4049 while (sg_miter_next(&piter)) {
4050 dpage_offset = 0;
4051 if (WARN_ON(!sg_miter_next(&diter))) {
4052 ret = 0x01;
4053 goto out;
4054 }
4055
4056 for (ppage_offset = 0; ppage_offset < piter.length;
4057 ppage_offset += sizeof(struct t10_pi_tuple)) {
4058 /* If we're at the end of the current
4059 * data page advance to the next one
4060 */
4061 if (dpage_offset >= diter.length) {
4062 if (WARN_ON(!sg_miter_next(&diter))) {
4063 ret = 0x01;
4064 goto out;
4065 }
4066 dpage_offset = 0;
4067 }
4068
4069 sdt = piter.addr + ppage_offset;
4070 daddr = diter.addr + dpage_offset;
4071
4072 if (SCpnt->cmnd[1] >> 5 != 3) { /* WRPROTECT */
4073 ret = dif_verify(sdt, daddr, sector, ei_lba);
4074 if (ret)
4075 goto out;
4076 }
4077
4078 sector++;
4079 ei_lba++;
4080 dpage_offset += sdebug_sector_size;
4081 }
4082 diter.consumed = dpage_offset;
4083 sg_miter_stop(&diter);
4084 }
4085 sg_miter_stop(&piter);
4086
4087 dif_copy_prot(SCpnt, start_sec, sectors, false);
4088 dix_writes++;
4089
4090 return 0;
4091
4092out:
4093 dif_errors++;
4094 sg_miter_stop(&diter);
4095 sg_miter_stop(&piter);
4096 return ret;
4097}
4098
4099static unsigned long lba_to_map_index(sector_t lba)
4100{
4101 if (sdebug_unmap_alignment)
4102 lba += sdebug_unmap_granularity - sdebug_unmap_alignment;
4103 sector_div(lba, sdebug_unmap_granularity);
4104 return lba;
4105}
4106
4107static sector_t map_index_to_lba(unsigned long index)
4108{
4109 sector_t lba = index * sdebug_unmap_granularity;
4110
4111 if (sdebug_unmap_alignment)
4112 lba -= sdebug_unmap_granularity - sdebug_unmap_alignment;
4113 return lba;
4114}
4115
4116static unsigned int map_state(struct sdeb_store_info *sip, sector_t lba,
4117 unsigned int *num)
4118{
4119 sector_t end;
4120 unsigned int mapped;
4121 unsigned long index;
4122 unsigned long next;
4123
4124 index = lba_to_map_index(lba);
4125 mapped = test_bit(index, sip->map_storep);
4126
4127 if (mapped)
4128 next = find_next_zero_bit(sip->map_storep, map_size, index);
4129 else
4130 next = find_next_bit(sip->map_storep, map_size, index);
4131
4132 end = min_t(sector_t, sdebug_store_sectors, map_index_to_lba(next));
4133 *num = end - lba;
4134 return mapped;
4135}
4136
4137static void map_region(struct sdeb_store_info *sip, sector_t lba,
4138 unsigned int len)
4139{
4140 sector_t end = lba + len;
4141
4142 while (lba < end) {
4143 unsigned long index = lba_to_map_index(lba);
4144
4145 if (index < map_size)
4146 set_bit(index, sip->map_storep);
4147
4148 lba = map_index_to_lba(index + 1);
4149 }
4150}
4151
4152static void unmap_region(struct sdeb_store_info *sip, sector_t lba,
4153 unsigned int len)
4154{
4155 sector_t end = lba + len;
4156 u8 *fsp = sip->storep;
4157
4158 while (lba < end) {
4159 unsigned long index = lba_to_map_index(lba);
4160
4161 if (lba == map_index_to_lba(index) &&
4162 lba + sdebug_unmap_granularity <= end &&
4163 index < map_size) {
4164 clear_bit(index, sip->map_storep);
4165 if (sdebug_lbprz) { /* for LBPRZ=2 return 0xff_s */
4166 memset(fsp + lba * sdebug_sector_size,
4167 (sdebug_lbprz & 1) ? 0 : 0xff,
4168 sdebug_sector_size *
4169 sdebug_unmap_granularity);
4170 }
4171 if (sip->dif_storep) {
4172 memset(sip->dif_storep + lba, 0xff,
4173 sizeof(*sip->dif_storep) *
4174 sdebug_unmap_granularity);
4175 }
4176 }
4177 lba = map_index_to_lba(index + 1);
4178 }
4179}
4180
4181static int resp_write_dt0(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
4182{
4183 bool check_prot;
4184 u32 num;
4185 u8 group = 0;
4186 u32 ei_lba;
4187 int ret;
4188 u64 lba;
4189 struct sdeb_store_info *sip = devip2sip(devip, true);
4190 u8 *cmd = scp->cmnd;
4191 bool meta_data_locked = false;
4192
4193 switch (cmd[0]) {
4194 case WRITE_16:
4195 ei_lba = 0;
4196 lba = get_unaligned_be64(cmd + 2);
4197 num = get_unaligned_be32(cmd + 10);
4198 group = cmd[14] & 0x3f;
4199 check_prot = true;
4200 break;
4201 case WRITE_10:
4202 ei_lba = 0;
4203 lba = get_unaligned_be32(cmd + 2);
4204 group = cmd[6] & 0x3f;
4205 num = get_unaligned_be16(cmd + 7);
4206 check_prot = true;
4207 break;
4208 case WRITE_6:
4209 ei_lba = 0;
4210 lba = (u32)cmd[3] | (u32)cmd[2] << 8 |
4211 (u32)(cmd[1] & 0x1f) << 16;
4212 num = (0 == cmd[4]) ? 256 : cmd[4];
4213 check_prot = true;
4214 break;
4215 case WRITE_12:
4216 ei_lba = 0;
4217 lba = get_unaligned_be32(cmd + 2);
4218 num = get_unaligned_be32(cmd + 6);
4219 group = cmd[6] & 0x3f;
4220 check_prot = true;
4221 break;
4222 case 0x53: /* XDWRITEREAD(10) */
4223 ei_lba = 0;
4224 lba = get_unaligned_be32(cmd + 2);
4225 group = cmd[6] & 0x1f;
4226 num = get_unaligned_be16(cmd + 7);
4227 check_prot = false;
4228 break;
4229 default: /* assume WRITE(32) */
4230 group = cmd[6] & 0x3f;
4231 lba = get_unaligned_be64(cmd + 12);
4232 ei_lba = get_unaligned_be32(cmd + 20);
4233 num = get_unaligned_be32(cmd + 28);
4234 check_prot = false;
4235 break;
4236 }
4237 if (unlikely(have_dif_prot && check_prot)) {
4238 if (sdebug_dif == T10_PI_TYPE2_PROTECTION &&
4239 (cmd[1] & 0xe0)) {
4240 mk_sense_invalid_opcode(scp);
4241 return check_condition_result;
4242 }
4243 if ((sdebug_dif == T10_PI_TYPE1_PROTECTION ||
4244 sdebug_dif == T10_PI_TYPE3_PROTECTION) &&
4245 (cmd[1] & 0xe0) == 0)
4246 sdev_printk(KERN_ERR, scp->device, "Unprotected WR "
4247 "to DIF device\n");
4248 }
4249
4250 if (sdebug_dev_is_zoned(devip) ||
4251 (sdebug_dix && scsi_prot_sg_count(scp)) ||
4252 scsi_debug_lbp()) {
4253 sdeb_meta_write_lock(sip);
4254 meta_data_locked = true;
4255 }
4256
4257 ret = check_device_access_params(scp, lba, num, true);
4258 if (ret) {
4259 if (meta_data_locked)
4260 sdeb_meta_write_unlock(sip);
4261 return ret;
4262 }
4263
4264 /* DIX + T10 DIF */
4265 if (unlikely(sdebug_dix && scsi_prot_sg_count(scp))) {
4266 switch (prot_verify_write(scp, lba, num, ei_lba)) {
4267 case 1: /* Guard tag error */
4268 if (scp->prot_flags & SCSI_PROT_GUARD_CHECK) {
4269 sdeb_meta_write_unlock(sip);
4270 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 1);
4271 return illegal_condition_result;
4272 } else if (scp->cmnd[1] >> 5 != 3) { /* WRPROTECT != 3 */
4273 sdeb_meta_write_unlock(sip);
4274 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 1);
4275 return check_condition_result;
4276 }
4277 break;
4278 case 3: /* Reference tag error */
4279 if (scp->prot_flags & SCSI_PROT_REF_CHECK) {
4280 sdeb_meta_write_unlock(sip);
4281 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 3);
4282 return illegal_condition_result;
4283 } else if (scp->cmnd[1] >> 5 != 3) { /* WRPROTECT != 3 */
4284 sdeb_meta_write_unlock(sip);
4285 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 3);
4286 return check_condition_result;
4287 }
4288 break;
4289 }
4290 }
4291
4292 ret = do_device_access(sip, scp, 0, lba, num, group, true, false);
4293 if (unlikely(scsi_debug_lbp()))
4294 map_region(sip, lba, num);
4295
4296 /* If ZBC zone then bump its write pointer */
4297 if (sdebug_dev_is_zoned(devip))
4298 zbc_inc_wp(devip, lba, num);
4299 if (meta_data_locked)
4300 sdeb_meta_write_unlock(sip);
4301
4302 if (unlikely(-1 == ret))
4303 return DID_ERROR << 16;
4304 else if (unlikely(sdebug_verbose &&
4305 (ret < (num * sdebug_sector_size))))
4306 sdev_printk(KERN_INFO, scp->device,
4307 "%s: write: cdb indicated=%u, IO sent=%d bytes\n",
4308 my_name, num * sdebug_sector_size, ret);
4309
4310 if (unlikely((sdebug_opts & SDEBUG_OPT_RECOV_DIF_DIX) &&
4311 atomic_read(&sdeb_inject_pending))) {
4312 if (sdebug_opts & SDEBUG_OPT_RECOVERED_ERR) {
4313 mk_sense_buffer(scp, RECOVERED_ERROR, THRESHOLD_EXCEEDED, 0);
4314 atomic_set(&sdeb_inject_pending, 0);
4315 return check_condition_result;
4316 } else if (sdebug_opts & SDEBUG_OPT_DIF_ERR) {
4317 /* Logical block guard check failed */
4318 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 1);
4319 atomic_set(&sdeb_inject_pending, 0);
4320 return illegal_condition_result;
4321 } else if (sdebug_opts & SDEBUG_OPT_DIX_ERR) {
4322 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 1);
4323 atomic_set(&sdeb_inject_pending, 0);
4324 return illegal_condition_result;
4325 }
4326 }
4327 return 0;
4328}
4329
4330/*
4331 * T10 has only specified WRITE SCATTERED(16) and WRITE SCATTERED(32).
4332 * No READ GATHERED yet (requires bidi or long cdb holding gather list).
4333 */
4334static int resp_write_scat(struct scsi_cmnd *scp,
4335 struct sdebug_dev_info *devip)
4336{
4337 u8 *cmd = scp->cmnd;
4338 u8 *lrdp = NULL;
4339 u8 *up;
4340 struct sdeb_store_info *sip = devip2sip(devip, true);
4341 u8 wrprotect;
4342 u16 lbdof, num_lrd, k;
4343 u32 num, num_by, bt_len, lbdof_blen, sg_off, cum_lb;
4344 u32 lb_size = sdebug_sector_size;
4345 u32 ei_lba;
4346 u64 lba;
4347 u8 group;
4348 int ret, res;
4349 bool is_16;
4350 static const u32 lrd_size = 32; /* + parameter list header size */
4351
4352 if (cmd[0] == VARIABLE_LENGTH_CMD) {
4353 is_16 = false;
4354 group = cmd[6] & 0x3f;
4355 wrprotect = (cmd[10] >> 5) & 0x7;
4356 lbdof = get_unaligned_be16(cmd + 12);
4357 num_lrd = get_unaligned_be16(cmd + 16);
4358 bt_len = get_unaligned_be32(cmd + 28);
4359 } else { /* that leaves WRITE SCATTERED(16) */
4360 is_16 = true;
4361 wrprotect = (cmd[2] >> 5) & 0x7;
4362 lbdof = get_unaligned_be16(cmd + 4);
4363 num_lrd = get_unaligned_be16(cmd + 8);
4364 bt_len = get_unaligned_be32(cmd + 10);
4365 group = cmd[14] & 0x3f;
4366 if (unlikely(have_dif_prot)) {
4367 if (sdebug_dif == T10_PI_TYPE2_PROTECTION &&
4368 wrprotect) {
4369 mk_sense_invalid_opcode(scp);
4370 return illegal_condition_result;
4371 }
4372 if ((sdebug_dif == T10_PI_TYPE1_PROTECTION ||
4373 sdebug_dif == T10_PI_TYPE3_PROTECTION) &&
4374 wrprotect == 0)
4375 sdev_printk(KERN_ERR, scp->device,
4376 "Unprotected WR to DIF device\n");
4377 }
4378 }
4379 if ((num_lrd == 0) || (bt_len == 0))
4380 return 0; /* T10 says these do-nothings are not errors */
4381 if (lbdof == 0) {
4382 if (sdebug_verbose)
4383 sdev_printk(KERN_INFO, scp->device,
4384 "%s: %s: LB Data Offset field bad\n",
4385 my_name, __func__);
4386 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
4387 return illegal_condition_result;
4388 }
4389 lbdof_blen = lbdof * lb_size;
4390 if ((lrd_size + (num_lrd * lrd_size)) > lbdof_blen) {
4391 if (sdebug_verbose)
4392 sdev_printk(KERN_INFO, scp->device,
4393 "%s: %s: LBA range descriptors don't fit\n",
4394 my_name, __func__);
4395 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
4396 return illegal_condition_result;
4397 }
4398 lrdp = kzalloc(lbdof_blen, GFP_ATOMIC | __GFP_NOWARN);
4399 if (lrdp == NULL)
4400 return SCSI_MLQUEUE_HOST_BUSY;
4401 if (sdebug_verbose)
4402 sdev_printk(KERN_INFO, scp->device,
4403 "%s: %s: Fetch header+scatter_list, lbdof_blen=%u\n",
4404 my_name, __func__, lbdof_blen);
4405 res = fetch_to_dev_buffer(scp, lrdp, lbdof_blen);
4406 if (res == -1) {
4407 ret = DID_ERROR << 16;
4408 goto err_out;
4409 }
4410
4411 /* Just keep it simple and always lock for now */
4412 sdeb_meta_write_lock(sip);
4413 sg_off = lbdof_blen;
4414 /* Spec says Buffer xfer Length field in number of LBs in dout */
4415 cum_lb = 0;
4416 for (k = 0, up = lrdp + lrd_size; k < num_lrd; ++k, up += lrd_size) {
4417 lba = get_unaligned_be64(up + 0);
4418 num = get_unaligned_be32(up + 8);
4419 if (sdebug_verbose)
4420 sdev_printk(KERN_INFO, scp->device,
4421 "%s: %s: k=%d LBA=0x%llx num=%u sg_off=%u\n",
4422 my_name, __func__, k, lba, num, sg_off);
4423 if (num == 0)
4424 continue;
4425 ret = check_device_access_params(scp, lba, num, true);
4426 if (ret)
4427 goto err_out_unlock;
4428 num_by = num * lb_size;
4429 ei_lba = is_16 ? 0 : get_unaligned_be32(up + 12);
4430
4431 if ((cum_lb + num) > bt_len) {
4432 if (sdebug_verbose)
4433 sdev_printk(KERN_INFO, scp->device,
4434 "%s: %s: sum of blocks > data provided\n",
4435 my_name, __func__);
4436 mk_sense_buffer(scp, ILLEGAL_REQUEST, WRITE_ERROR_ASC,
4437 0);
4438 ret = illegal_condition_result;
4439 goto err_out_unlock;
4440 }
4441
4442 /* DIX + T10 DIF */
4443 if (unlikely(sdebug_dix && scsi_prot_sg_count(scp))) {
4444 int prot_ret = prot_verify_write(scp, lba, num,
4445 ei_lba);
4446
4447 if (prot_ret) {
4448 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10,
4449 prot_ret);
4450 ret = illegal_condition_result;
4451 goto err_out_unlock;
4452 }
4453 }
4454
4455 /*
4456 * Write ranges atomically to keep as close to pre-atomic
4457 * writes behaviour as possible.
4458 */
4459 ret = do_device_access(sip, scp, sg_off, lba, num, group, true, true);
4460 /* If ZBC zone then bump its write pointer */
4461 if (sdebug_dev_is_zoned(devip))
4462 zbc_inc_wp(devip, lba, num);
4463 if (unlikely(scsi_debug_lbp()))
4464 map_region(sip, lba, num);
4465 if (unlikely(-1 == ret)) {
4466 ret = DID_ERROR << 16;
4467 goto err_out_unlock;
4468 } else if (unlikely(sdebug_verbose && (ret < num_by)))
4469 sdev_printk(KERN_INFO, scp->device,
4470 "%s: write: cdb indicated=%u, IO sent=%d bytes\n",
4471 my_name, num_by, ret);
4472
4473 if (unlikely((sdebug_opts & SDEBUG_OPT_RECOV_DIF_DIX) &&
4474 atomic_read(&sdeb_inject_pending))) {
4475 if (sdebug_opts & SDEBUG_OPT_RECOVERED_ERR) {
4476 mk_sense_buffer(scp, RECOVERED_ERROR, THRESHOLD_EXCEEDED, 0);
4477 atomic_set(&sdeb_inject_pending, 0);
4478 ret = check_condition_result;
4479 goto err_out_unlock;
4480 } else if (sdebug_opts & SDEBUG_OPT_DIF_ERR) {
4481 /* Logical block guard check failed */
4482 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 1);
4483 atomic_set(&sdeb_inject_pending, 0);
4484 ret = illegal_condition_result;
4485 goto err_out_unlock;
4486 } else if (sdebug_opts & SDEBUG_OPT_DIX_ERR) {
4487 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 1);
4488 atomic_set(&sdeb_inject_pending, 0);
4489 ret = illegal_condition_result;
4490 goto err_out_unlock;
4491 }
4492 }
4493 sg_off += num_by;
4494 cum_lb += num;
4495 }
4496 ret = 0;
4497err_out_unlock:
4498 sdeb_meta_write_unlock(sip);
4499err_out:
4500 kfree(lrdp);
4501 return ret;
4502}
4503
4504static int resp_write_same(struct scsi_cmnd *scp, u64 lba, u32 num,
4505 u32 ei_lba, bool unmap, bool ndob)
4506{
4507 struct scsi_device *sdp = scp->device;
4508 struct sdebug_dev_info *devip = (struct sdebug_dev_info *)sdp->hostdata;
4509 unsigned long long i;
4510 u64 block, lbaa;
4511 u32 lb_size = sdebug_sector_size;
4512 int ret;
4513 struct sdeb_store_info *sip = devip2sip((struct sdebug_dev_info *)
4514 scp->device->hostdata, true);
4515 u8 *fs1p;
4516 u8 *fsp;
4517 bool meta_data_locked = false;
4518
4519 if (sdebug_dev_is_zoned(devip) || scsi_debug_lbp()) {
4520 sdeb_meta_write_lock(sip);
4521 meta_data_locked = true;
4522 }
4523
4524 ret = check_device_access_params(scp, lba, num, true);
4525 if (ret)
4526 goto out;
4527
4528 if (unmap && scsi_debug_lbp()) {
4529 unmap_region(sip, lba, num);
4530 goto out;
4531 }
4532 lbaa = lba;
4533 block = do_div(lbaa, sdebug_store_sectors);
4534 /* if ndob then zero 1 logical block, else fetch 1 logical block */
4535 fsp = sip->storep;
4536 fs1p = fsp + (block * lb_size);
4537 sdeb_data_write_lock(sip);
4538 if (ndob) {
4539 memset(fs1p, 0, lb_size);
4540 ret = 0;
4541 } else
4542 ret = fetch_to_dev_buffer(scp, fs1p, lb_size);
4543
4544 if (-1 == ret) {
4545 ret = DID_ERROR << 16;
4546 goto out;
4547 } else if (sdebug_verbose && !ndob && (ret < lb_size))
4548 sdev_printk(KERN_INFO, scp->device,
4549 "%s: %s: lb size=%u, IO sent=%d bytes\n",
4550 my_name, "write same", lb_size, ret);
4551
4552 /* Copy first sector to remaining blocks */
4553 for (i = 1 ; i < num ; i++) {
4554 lbaa = lba + i;
4555 block = do_div(lbaa, sdebug_store_sectors);
4556 memmove(fsp + (block * lb_size), fs1p, lb_size);
4557 }
4558 if (scsi_debug_lbp())
4559 map_region(sip, lba, num);
4560 /* If ZBC zone then bump its write pointer */
4561 if (sdebug_dev_is_zoned(devip))
4562 zbc_inc_wp(devip, lba, num);
4563 sdeb_data_write_unlock(sip);
4564 ret = 0;
4565out:
4566 if (meta_data_locked)
4567 sdeb_meta_write_unlock(sip);
4568 return ret;
4569}
4570
4571static int resp_write_same_10(struct scsi_cmnd *scp,
4572 struct sdebug_dev_info *devip)
4573{
4574 u8 *cmd = scp->cmnd;
4575 u32 lba;
4576 u16 num;
4577 u32 ei_lba = 0;
4578 bool unmap = false;
4579
4580 if (cmd[1] & 0x8) {
4581 if (sdebug_lbpws10 == 0) {
4582 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 3);
4583 return check_condition_result;
4584 } else
4585 unmap = true;
4586 }
4587 lba = get_unaligned_be32(cmd + 2);
4588 num = get_unaligned_be16(cmd + 7);
4589 if (num > sdebug_write_same_length) {
4590 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 7, -1);
4591 return check_condition_result;
4592 }
4593 return resp_write_same(scp, lba, num, ei_lba, unmap, false);
4594}
4595
4596static int resp_write_same_16(struct scsi_cmnd *scp,
4597 struct sdebug_dev_info *devip)
4598{
4599 u8 *cmd = scp->cmnd;
4600 u64 lba;
4601 u32 num;
4602 u32 ei_lba = 0;
4603 bool unmap = false;
4604 bool ndob = false;
4605
4606 if (cmd[1] & 0x8) { /* UNMAP */
4607 if (sdebug_lbpws == 0) {
4608 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 3);
4609 return check_condition_result;
4610 } else
4611 unmap = true;
4612 }
4613 if (cmd[1] & 0x1) /* NDOB (no data-out buffer, assumes zeroes) */
4614 ndob = true;
4615 lba = get_unaligned_be64(cmd + 2);
4616 num = get_unaligned_be32(cmd + 10);
4617 if (num > sdebug_write_same_length) {
4618 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 10, -1);
4619 return check_condition_result;
4620 }
4621 return resp_write_same(scp, lba, num, ei_lba, unmap, ndob);
4622}
4623
4624/* Note the mode field is in the same position as the (lower) service action
4625 * field. For the Report supported operation codes command, SPC-4 suggests
4626 * each mode of this command should be reported separately; for future. */
4627static int resp_write_buffer(struct scsi_cmnd *scp,
4628 struct sdebug_dev_info *devip)
4629{
4630 u8 *cmd = scp->cmnd;
4631 struct scsi_device *sdp = scp->device;
4632 struct sdebug_dev_info *dp;
4633 u8 mode;
4634
4635 mode = cmd[1] & 0x1f;
4636 switch (mode) {
4637 case 0x4: /* download microcode (MC) and activate (ACT) */
4638 /* set UAs on this device only */
4639 set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm);
4640 set_bit(SDEBUG_UA_MICROCODE_CHANGED, devip->uas_bm);
4641 break;
4642 case 0x5: /* download MC, save and ACT */
4643 set_bit(SDEBUG_UA_MICROCODE_CHANGED_WO_RESET, devip->uas_bm);
4644 break;
4645 case 0x6: /* download MC with offsets and ACT */
4646 /* set UAs on most devices (LUs) in this target */
4647 list_for_each_entry(dp,
4648 &devip->sdbg_host->dev_info_list,
4649 dev_list)
4650 if (dp->target == sdp->id) {
4651 set_bit(SDEBUG_UA_BUS_RESET, dp->uas_bm);
4652 if (devip != dp)
4653 set_bit(SDEBUG_UA_MICROCODE_CHANGED,
4654 dp->uas_bm);
4655 }
4656 break;
4657 case 0x7: /* download MC with offsets, save, and ACT */
4658 /* set UA on all devices (LUs) in this target */
4659 list_for_each_entry(dp,
4660 &devip->sdbg_host->dev_info_list,
4661 dev_list)
4662 if (dp->target == sdp->id)
4663 set_bit(SDEBUG_UA_MICROCODE_CHANGED_WO_RESET,
4664 dp->uas_bm);
4665 break;
4666 default:
4667 /* do nothing for this command for other mode values */
4668 break;
4669 }
4670 return 0;
4671}
4672
4673static int resp_comp_write(struct scsi_cmnd *scp,
4674 struct sdebug_dev_info *devip)
4675{
4676 u8 *cmd = scp->cmnd;
4677 u8 *arr;
4678 struct sdeb_store_info *sip = devip2sip(devip, true);
4679 u64 lba;
4680 u32 dnum;
4681 u32 lb_size = sdebug_sector_size;
4682 u8 num;
4683 int ret;
4684 int retval = 0;
4685
4686 lba = get_unaligned_be64(cmd + 2);
4687 num = cmd[13]; /* 1 to a maximum of 255 logical blocks */
4688 if (0 == num)
4689 return 0; /* degenerate case, not an error */
4690 if (sdebug_dif == T10_PI_TYPE2_PROTECTION &&
4691 (cmd[1] & 0xe0)) {
4692 mk_sense_invalid_opcode(scp);
4693 return check_condition_result;
4694 }
4695 if ((sdebug_dif == T10_PI_TYPE1_PROTECTION ||
4696 sdebug_dif == T10_PI_TYPE3_PROTECTION) &&
4697 (cmd[1] & 0xe0) == 0)
4698 sdev_printk(KERN_ERR, scp->device, "Unprotected WR "
4699 "to DIF device\n");
4700 ret = check_device_access_params(scp, lba, num, false);
4701 if (ret)
4702 return ret;
4703 dnum = 2 * num;
4704 arr = kcalloc(lb_size, dnum, GFP_ATOMIC);
4705 if (NULL == arr) {
4706 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
4707 INSUFF_RES_ASCQ);
4708 return check_condition_result;
4709 }
4710
4711 ret = do_dout_fetch(scp, dnum, arr);
4712 if (ret == -1) {
4713 retval = DID_ERROR << 16;
4714 goto cleanup_free;
4715 } else if (sdebug_verbose && (ret < (dnum * lb_size)))
4716 sdev_printk(KERN_INFO, scp->device, "%s: compare_write: cdb "
4717 "indicated=%u, IO sent=%d bytes\n", my_name,
4718 dnum * lb_size, ret);
4719
4720 sdeb_data_write_lock(sip);
4721 sdeb_meta_write_lock(sip);
4722 if (!comp_write_worker(sip, lba, num, arr, false)) {
4723 mk_sense_buffer(scp, MISCOMPARE, MISCOMPARE_VERIFY_ASC, 0);
4724 retval = check_condition_result;
4725 goto cleanup_unlock;
4726 }
4727
4728 /* Cover sip->map_storep (which map_region()) sets with data lock */
4729 if (scsi_debug_lbp())
4730 map_region(sip, lba, num);
4731cleanup_unlock:
4732 sdeb_meta_write_unlock(sip);
4733 sdeb_data_write_unlock(sip);
4734cleanup_free:
4735 kfree(arr);
4736 return retval;
4737}
4738
4739struct unmap_block_desc {
4740 __be64 lba;
4741 __be32 blocks;
4742 __be32 __reserved;
4743};
4744
4745static int resp_unmap(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
4746{
4747 unsigned char *buf;
4748 struct unmap_block_desc *desc;
4749 struct sdeb_store_info *sip = devip2sip(devip, true);
4750 unsigned int i, payload_len, descriptors;
4751 int ret;
4752
4753 if (!scsi_debug_lbp())
4754 return 0; /* fib and say its done */
4755 payload_len = get_unaligned_be16(scp->cmnd + 7);
4756 BUG_ON(scsi_bufflen(scp) != payload_len);
4757
4758 descriptors = (payload_len - 8) / 16;
4759 if (descriptors > sdebug_unmap_max_desc) {
4760 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 7, -1);
4761 return check_condition_result;
4762 }
4763
4764 buf = kzalloc(scsi_bufflen(scp), GFP_ATOMIC);
4765 if (!buf) {
4766 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
4767 INSUFF_RES_ASCQ);
4768 return check_condition_result;
4769 }
4770
4771 scsi_sg_copy_to_buffer(scp, buf, scsi_bufflen(scp));
4772
4773 BUG_ON(get_unaligned_be16(&buf[0]) != payload_len - 2);
4774 BUG_ON(get_unaligned_be16(&buf[2]) != descriptors * 16);
4775
4776 desc = (void *)&buf[8];
4777
4778 sdeb_meta_write_lock(sip);
4779
4780 for (i = 0 ; i < descriptors ; i++) {
4781 unsigned long long lba = get_unaligned_be64(&desc[i].lba);
4782 unsigned int num = get_unaligned_be32(&desc[i].blocks);
4783
4784 ret = check_device_access_params(scp, lba, num, true);
4785 if (ret)
4786 goto out;
4787
4788 unmap_region(sip, lba, num);
4789 }
4790
4791 ret = 0;
4792
4793out:
4794 sdeb_meta_write_unlock(sip);
4795 kfree(buf);
4796
4797 return ret;
4798}
4799
4800#define SDEBUG_GET_LBA_STATUS_LEN 32
4801
4802static int resp_get_lba_status(struct scsi_cmnd *scp,
4803 struct sdebug_dev_info *devip)
4804{
4805 u8 *cmd = scp->cmnd;
4806 u64 lba;
4807 u32 alloc_len, mapped, num;
4808 int ret;
4809 u8 arr[SDEBUG_GET_LBA_STATUS_LEN];
4810
4811 lba = get_unaligned_be64(cmd + 2);
4812 alloc_len = get_unaligned_be32(cmd + 10);
4813
4814 if (alloc_len < 24)
4815 return 0;
4816
4817 ret = check_device_access_params(scp, lba, 1, false);
4818 if (ret)
4819 return ret;
4820
4821 if (scsi_debug_lbp()) {
4822 struct sdeb_store_info *sip = devip2sip(devip, true);
4823
4824 mapped = map_state(sip, lba, &num);
4825 } else {
4826 mapped = 1;
4827 /* following just in case virtual_gb changed */
4828 sdebug_capacity = get_sdebug_capacity();
4829 if (sdebug_capacity - lba <= 0xffffffff)
4830 num = sdebug_capacity - lba;
4831 else
4832 num = 0xffffffff;
4833 }
4834
4835 memset(arr, 0, SDEBUG_GET_LBA_STATUS_LEN);
4836 put_unaligned_be32(20, arr); /* Parameter Data Length */
4837 put_unaligned_be64(lba, arr + 8); /* LBA */
4838 put_unaligned_be32(num, arr + 16); /* Number of blocks */
4839 arr[20] = !mapped; /* prov_stat=0: mapped; 1: dealloc */
4840
4841 return fill_from_dev_buffer(scp, arr, SDEBUG_GET_LBA_STATUS_LEN);
4842}
4843
4844static int resp_get_stream_status(struct scsi_cmnd *scp,
4845 struct sdebug_dev_info *devip)
4846{
4847 u16 starting_stream_id, stream_id;
4848 const u8 *cmd = scp->cmnd;
4849 u32 alloc_len, offset;
4850 u8 arr[256] = {};
4851 struct scsi_stream_status_header *h = (void *)arr;
4852
4853 starting_stream_id = get_unaligned_be16(cmd + 4);
4854 alloc_len = get_unaligned_be32(cmd + 10);
4855
4856 if (alloc_len < 8) {
4857 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 10, -1);
4858 return check_condition_result;
4859 }
4860
4861 if (starting_stream_id >= MAXIMUM_NUMBER_OF_STREAMS) {
4862 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 4, -1);
4863 return check_condition_result;
4864 }
4865
4866 /*
4867 * The GET STREAM STATUS command only reports status information
4868 * about open streams. Treat the non-permanent stream as open.
4869 */
4870 put_unaligned_be16(MAXIMUM_NUMBER_OF_STREAMS,
4871 &h->number_of_open_streams);
4872
4873 for (offset = 8, stream_id = starting_stream_id;
4874 offset + 8 <= min_t(u32, alloc_len, sizeof(arr)) &&
4875 stream_id < MAXIMUM_NUMBER_OF_STREAMS;
4876 offset += 8, stream_id++) {
4877 struct scsi_stream_status *stream_status = (void *)arr + offset;
4878
4879 stream_status->perm = stream_id < PERMANENT_STREAM_COUNT;
4880 put_unaligned_be16(stream_id,
4881 &stream_status->stream_identifier);
4882 stream_status->rel_lifetime = stream_id + 1;
4883 }
4884 put_unaligned_be32(offset - 8, &h->len); /* PARAMETER DATA LENGTH */
4885
4886 return fill_from_dev_buffer(scp, arr, min(offset, alloc_len));
4887}
4888
4889static int resp_sync_cache(struct scsi_cmnd *scp,
4890 struct sdebug_dev_info *devip)
4891{
4892 int res = 0;
4893 u64 lba;
4894 u32 num_blocks;
4895 u8 *cmd = scp->cmnd;
4896
4897 if (cmd[0] == SYNCHRONIZE_CACHE) { /* 10 byte cdb */
4898 lba = get_unaligned_be32(cmd + 2);
4899 num_blocks = get_unaligned_be16(cmd + 7);
4900 } else { /* SYNCHRONIZE_CACHE(16) */
4901 lba = get_unaligned_be64(cmd + 2);
4902 num_blocks = get_unaligned_be32(cmd + 10);
4903 }
4904 if (lba + num_blocks > sdebug_capacity) {
4905 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
4906 return check_condition_result;
4907 }
4908 if (!write_since_sync || (cmd[1] & 0x2))
4909 res = SDEG_RES_IMMED_MASK;
4910 else /* delay if write_since_sync and IMMED clear */
4911 write_since_sync = false;
4912 return res;
4913}
4914
4915/*
4916 * Assuming the LBA+num_blocks is not out-of-range, this function will return
4917 * CONDITION MET if the specified blocks will/have fitted in the cache, and
4918 * a GOOD status otherwise. Model a disk with a big cache and yield
4919 * CONDITION MET. Actually tries to bring range in main memory into the
4920 * cache associated with the CPU(s).
4921 */
4922static int resp_pre_fetch(struct scsi_cmnd *scp,
4923 struct sdebug_dev_info *devip)
4924{
4925 int res = 0;
4926 u64 lba;
4927 u64 block, rest = 0;
4928 u32 nblks;
4929 u8 *cmd = scp->cmnd;
4930 struct sdeb_store_info *sip = devip2sip(devip, true);
4931 u8 *fsp = sip->storep;
4932
4933 if (cmd[0] == PRE_FETCH) { /* 10 byte cdb */
4934 lba = get_unaligned_be32(cmd + 2);
4935 nblks = get_unaligned_be16(cmd + 7);
4936 } else { /* PRE-FETCH(16) */
4937 lba = get_unaligned_be64(cmd + 2);
4938 nblks = get_unaligned_be32(cmd + 10);
4939 }
4940 if (lba + nblks > sdebug_capacity) {
4941 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
4942 return check_condition_result;
4943 }
4944 if (!fsp)
4945 goto fini;
4946 /* PRE-FETCH spec says nothing about LBP or PI so skip them */
4947 block = do_div(lba, sdebug_store_sectors);
4948 if (block + nblks > sdebug_store_sectors)
4949 rest = block + nblks - sdebug_store_sectors;
4950
4951 /* Try to bring the PRE-FETCH range into CPU's cache */
4952 sdeb_data_read_lock(sip);
4953 prefetch_range(fsp + (sdebug_sector_size * block),
4954 (nblks - rest) * sdebug_sector_size);
4955 if (rest)
4956 prefetch_range(fsp, rest * sdebug_sector_size);
4957
4958 sdeb_data_read_unlock(sip);
4959fini:
4960 if (cmd[1] & 0x2)
4961 res = SDEG_RES_IMMED_MASK;
4962 return res | condition_met_result;
4963}
4964
4965#define RL_BUCKET_ELEMS 8
4966
4967/* Even though each pseudo target has a REPORT LUNS "well known logical unit"
4968 * (W-LUN), the normal Linux scanning logic does not associate it with a
4969 * device (e.g. /dev/sg7). The following magic will make that association:
4970 * "cd /sys/class/scsi_host/host<n> ; echo '- - 49409' > scan"
4971 * where <n> is a host number. If there are multiple targets in a host then
4972 * the above will associate a W-LUN to each target. To only get a W-LUN
4973 * for target 2, then use "echo '- 2 49409' > scan" .
4974 */
4975static int resp_report_luns(struct scsi_cmnd *scp,
4976 struct sdebug_dev_info *devip)
4977{
4978 unsigned char *cmd = scp->cmnd;
4979 unsigned int alloc_len;
4980 unsigned char select_report;
4981 u64 lun;
4982 struct scsi_lun *lun_p;
4983 u8 arr[RL_BUCKET_ELEMS * sizeof(struct scsi_lun)];
4984 unsigned int lun_cnt; /* normal LUN count (max: 256) */
4985 unsigned int wlun_cnt; /* report luns W-LUN count */
4986 unsigned int tlun_cnt; /* total LUN count */
4987 unsigned int rlen; /* response length (in bytes) */
4988 int k, j, n, res;
4989 unsigned int off_rsp = 0;
4990 const int sz_lun = sizeof(struct scsi_lun);
4991
4992 clear_luns_changed_on_target(devip);
4993
4994 select_report = cmd[2];
4995 alloc_len = get_unaligned_be32(cmd + 6);
4996
4997 if (alloc_len < 4) {
4998 pr_err("alloc len too small %d\n", alloc_len);
4999 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 6, -1);
5000 return check_condition_result;
5001 }
5002
5003 switch (select_report) {
5004 case 0: /* all LUNs apart from W-LUNs */
5005 lun_cnt = sdebug_max_luns;
5006 wlun_cnt = 0;
5007 break;
5008 case 1: /* only W-LUNs */
5009 lun_cnt = 0;
5010 wlun_cnt = 1;
5011 break;
5012 case 2: /* all LUNs */
5013 lun_cnt = sdebug_max_luns;
5014 wlun_cnt = 1;
5015 break;
5016 case 0x10: /* only administrative LUs */
5017 case 0x11: /* see SPC-5 */
5018 case 0x12: /* only subsiduary LUs owned by referenced LU */
5019 default:
5020 pr_debug("select report invalid %d\n", select_report);
5021 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, -1);
5022 return check_condition_result;
5023 }
5024
5025 if (sdebug_no_lun_0 && (lun_cnt > 0))
5026 --lun_cnt;
5027
5028 tlun_cnt = lun_cnt + wlun_cnt;
5029 rlen = tlun_cnt * sz_lun; /* excluding 8 byte header */
5030 scsi_set_resid(scp, scsi_bufflen(scp));
5031 pr_debug("select_report %d luns = %d wluns = %d no_lun0 %d\n",
5032 select_report, lun_cnt, wlun_cnt, sdebug_no_lun_0);
5033
5034 /* loops rely on sizeof response header same as sizeof lun (both 8) */
5035 lun = sdebug_no_lun_0 ? 1 : 0;
5036 for (k = 0, j = 0, res = 0; true; ++k, j = 0) {
5037 memset(arr, 0, sizeof(arr));
5038 lun_p = (struct scsi_lun *)&arr[0];
5039 if (k == 0) {
5040 put_unaligned_be32(rlen, &arr[0]);
5041 ++lun_p;
5042 j = 1;
5043 }
5044 for ( ; j < RL_BUCKET_ELEMS; ++j, ++lun_p) {
5045 if ((k * RL_BUCKET_ELEMS) + j > lun_cnt)
5046 break;
5047 int_to_scsilun(lun++, lun_p);
5048 if (lun > 1 && sdebug_lun_am == SAM_LUN_AM_FLAT)
5049 lun_p->scsi_lun[0] |= 0x40;
5050 }
5051 if (j < RL_BUCKET_ELEMS)
5052 break;
5053 n = j * sz_lun;
5054 res = p_fill_from_dev_buffer(scp, arr, n, off_rsp);
5055 if (res)
5056 return res;
5057 off_rsp += n;
5058 }
5059 if (wlun_cnt) {
5060 int_to_scsilun(SCSI_W_LUN_REPORT_LUNS, lun_p);
5061 ++j;
5062 }
5063 if (j > 0)
5064 res = p_fill_from_dev_buffer(scp, arr, j * sz_lun, off_rsp);
5065 return res;
5066}
5067
5068static int resp_verify(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
5069{
5070 bool is_bytchk3 = false;
5071 u8 bytchk;
5072 int ret, j;
5073 u32 vnum, a_num, off;
5074 const u32 lb_size = sdebug_sector_size;
5075 u64 lba;
5076 u8 *arr;
5077 u8 *cmd = scp->cmnd;
5078 struct sdeb_store_info *sip = devip2sip(devip, true);
5079
5080 bytchk = (cmd[1] >> 1) & 0x3;
5081 if (bytchk == 0) {
5082 return 0; /* always claim internal verify okay */
5083 } else if (bytchk == 2) {
5084 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 2);
5085 return check_condition_result;
5086 } else if (bytchk == 3) {
5087 is_bytchk3 = true; /* 1 block sent, compared repeatedly */
5088 }
5089 switch (cmd[0]) {
5090 case VERIFY_16:
5091 lba = get_unaligned_be64(cmd + 2);
5092 vnum = get_unaligned_be32(cmd + 10);
5093 break;
5094 case VERIFY: /* is VERIFY(10) */
5095 lba = get_unaligned_be32(cmd + 2);
5096 vnum = get_unaligned_be16(cmd + 7);
5097 break;
5098 default:
5099 mk_sense_invalid_opcode(scp);
5100 return check_condition_result;
5101 }
5102 if (vnum == 0)
5103 return 0; /* not an error */
5104 a_num = is_bytchk3 ? 1 : vnum;
5105 /* Treat following check like one for read (i.e. no write) access */
5106 ret = check_device_access_params(scp, lba, a_num, false);
5107 if (ret)
5108 return ret;
5109
5110 arr = kcalloc(lb_size, vnum, GFP_ATOMIC | __GFP_NOWARN);
5111 if (!arr) {
5112 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
5113 INSUFF_RES_ASCQ);
5114 return check_condition_result;
5115 }
5116 /* Not changing store, so only need read access */
5117 sdeb_data_read_lock(sip);
5118
5119 ret = do_dout_fetch(scp, a_num, arr);
5120 if (ret == -1) {
5121 ret = DID_ERROR << 16;
5122 goto cleanup;
5123 } else if (sdebug_verbose && (ret < (a_num * lb_size))) {
5124 sdev_printk(KERN_INFO, scp->device,
5125 "%s: %s: cdb indicated=%u, IO sent=%d bytes\n",
5126 my_name, __func__, a_num * lb_size, ret);
5127 }
5128 if (is_bytchk3) {
5129 for (j = 1, off = lb_size; j < vnum; ++j, off += lb_size)
5130 memcpy(arr + off, arr, lb_size);
5131 }
5132 ret = 0;
5133 if (!comp_write_worker(sip, lba, vnum, arr, true)) {
5134 mk_sense_buffer(scp, MISCOMPARE, MISCOMPARE_VERIFY_ASC, 0);
5135 ret = check_condition_result;
5136 goto cleanup;
5137 }
5138cleanup:
5139 sdeb_data_read_unlock(sip);
5140 kfree(arr);
5141 return ret;
5142}
5143
5144#define RZONES_DESC_HD 64
5145
5146/* Report zones depending on start LBA and reporting options */
5147static int resp_report_zones(struct scsi_cmnd *scp,
5148 struct sdebug_dev_info *devip)
5149{
5150 unsigned int rep_max_zones, nrz = 0;
5151 int ret = 0;
5152 u32 alloc_len, rep_opts, rep_len;
5153 bool partial;
5154 u64 lba, zs_lba;
5155 u8 *arr = NULL, *desc;
5156 u8 *cmd = scp->cmnd;
5157 struct sdeb_zone_state *zsp = NULL;
5158 struct sdeb_store_info *sip = devip2sip(devip, false);
5159
5160 if (!sdebug_dev_is_zoned(devip)) {
5161 mk_sense_invalid_opcode(scp);
5162 return check_condition_result;
5163 }
5164 zs_lba = get_unaligned_be64(cmd + 2);
5165 alloc_len = get_unaligned_be32(cmd + 10);
5166 if (alloc_len == 0)
5167 return 0; /* not an error */
5168 rep_opts = cmd[14] & 0x3f;
5169 partial = cmd[14] & 0x80;
5170
5171 if (zs_lba >= sdebug_capacity) {
5172 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
5173 return check_condition_result;
5174 }
5175
5176 rep_max_zones = (alloc_len - 64) >> ilog2(RZONES_DESC_HD);
5177
5178 arr = kzalloc(alloc_len, GFP_ATOMIC | __GFP_NOWARN);
5179 if (!arr) {
5180 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
5181 INSUFF_RES_ASCQ);
5182 return check_condition_result;
5183 }
5184
5185 sdeb_meta_read_lock(sip);
5186
5187 desc = arr + 64;
5188 for (lba = zs_lba; lba < sdebug_capacity;
5189 lba = zsp->z_start + zsp->z_size) {
5190 if (WARN_ONCE(zbc_zone(devip, lba) == zsp, "lba = %llu\n", lba))
5191 break;
5192 zsp = zbc_zone(devip, lba);
5193 switch (rep_opts) {
5194 case 0x00:
5195 /* All zones */
5196 break;
5197 case 0x01:
5198 /* Empty zones */
5199 if (zsp->z_cond != ZC1_EMPTY)
5200 continue;
5201 break;
5202 case 0x02:
5203 /* Implicit open zones */
5204 if (zsp->z_cond != ZC2_IMPLICIT_OPEN)
5205 continue;
5206 break;
5207 case 0x03:
5208 /* Explicit open zones */
5209 if (zsp->z_cond != ZC3_EXPLICIT_OPEN)
5210 continue;
5211 break;
5212 case 0x04:
5213 /* Closed zones */
5214 if (zsp->z_cond != ZC4_CLOSED)
5215 continue;
5216 break;
5217 case 0x05:
5218 /* Full zones */
5219 if (zsp->z_cond != ZC5_FULL)
5220 continue;
5221 break;
5222 case 0x06:
5223 case 0x07:
5224 case 0x10:
5225 /*
5226 * Read-only, offline, reset WP recommended are
5227 * not emulated: no zones to report;
5228 */
5229 continue;
5230 case 0x11:
5231 /* non-seq-resource set */
5232 if (!zsp->z_non_seq_resource)
5233 continue;
5234 break;
5235 case 0x3e:
5236 /* All zones except gap zones. */
5237 if (zbc_zone_is_gap(zsp))
5238 continue;
5239 break;
5240 case 0x3f:
5241 /* Not write pointer (conventional) zones */
5242 if (zbc_zone_is_seq(zsp))
5243 continue;
5244 break;
5245 default:
5246 mk_sense_buffer(scp, ILLEGAL_REQUEST,
5247 INVALID_FIELD_IN_CDB, 0);
5248 ret = check_condition_result;
5249 goto fini;
5250 }
5251
5252 if (nrz < rep_max_zones) {
5253 /* Fill zone descriptor */
5254 desc[0] = zsp->z_type;
5255 desc[1] = zsp->z_cond << 4;
5256 if (zsp->z_non_seq_resource)
5257 desc[1] |= 1 << 1;
5258 put_unaligned_be64((u64)zsp->z_size, desc + 8);
5259 put_unaligned_be64((u64)zsp->z_start, desc + 16);
5260 put_unaligned_be64((u64)zsp->z_wp, desc + 24);
5261 desc += 64;
5262 }
5263
5264 if (partial && nrz >= rep_max_zones)
5265 break;
5266
5267 nrz++;
5268 }
5269
5270 /* Report header */
5271 /* Zone list length. */
5272 put_unaligned_be32(nrz * RZONES_DESC_HD, arr + 0);
5273 /* Maximum LBA */
5274 put_unaligned_be64(sdebug_capacity - 1, arr + 8);
5275 /* Zone starting LBA granularity. */
5276 if (devip->zcap < devip->zsize)
5277 put_unaligned_be64(devip->zsize, arr + 16);
5278
5279 rep_len = (unsigned long)desc - (unsigned long)arr;
5280 ret = fill_from_dev_buffer(scp, arr, min_t(u32, alloc_len, rep_len));
5281
5282fini:
5283 sdeb_meta_read_unlock(sip);
5284 kfree(arr);
5285 return ret;
5286}
5287
5288static int resp_atomic_write(struct scsi_cmnd *scp,
5289 struct sdebug_dev_info *devip)
5290{
5291 struct sdeb_store_info *sip;
5292 u8 *cmd = scp->cmnd;
5293 u16 boundary, len;
5294 u64 lba, lba_tmp;
5295 int ret;
5296
5297 if (!scsi_debug_atomic_write()) {
5298 mk_sense_invalid_opcode(scp);
5299 return check_condition_result;
5300 }
5301
5302 sip = devip2sip(devip, true);
5303
5304 lba = get_unaligned_be64(cmd + 2);
5305 boundary = get_unaligned_be16(cmd + 10);
5306 len = get_unaligned_be16(cmd + 12);
5307
5308 lba_tmp = lba;
5309 if (sdebug_atomic_wr_align &&
5310 do_div(lba_tmp, sdebug_atomic_wr_align)) {
5311 /* Does not meet alignment requirement */
5312 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
5313 return check_condition_result;
5314 }
5315
5316 if (sdebug_atomic_wr_gran && len % sdebug_atomic_wr_gran) {
5317 /* Does not meet alignment requirement */
5318 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
5319 return check_condition_result;
5320 }
5321
5322 if (boundary > 0) {
5323 if (boundary > sdebug_atomic_wr_max_bndry) {
5324 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 12, -1);
5325 return check_condition_result;
5326 }
5327
5328 if (len > sdebug_atomic_wr_max_length_bndry) {
5329 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 12, -1);
5330 return check_condition_result;
5331 }
5332 } else {
5333 if (len > sdebug_atomic_wr_max_length) {
5334 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 12, -1);
5335 return check_condition_result;
5336 }
5337 }
5338
5339 ret = do_device_access(sip, scp, 0, lba, len, 0, true, true);
5340 if (unlikely(ret == -1))
5341 return DID_ERROR << 16;
5342 if (unlikely(ret != len * sdebug_sector_size))
5343 return DID_ERROR << 16;
5344 return 0;
5345}
5346
5347/* Logic transplanted from tcmu-runner, file_zbc.c */
5348static void zbc_open_all(struct sdebug_dev_info *devip)
5349{
5350 struct sdeb_zone_state *zsp = &devip->zstate[0];
5351 unsigned int i;
5352
5353 for (i = 0; i < devip->nr_zones; i++, zsp++) {
5354 if (zsp->z_cond == ZC4_CLOSED)
5355 zbc_open_zone(devip, &devip->zstate[i], true);
5356 }
5357}
5358
5359static int resp_open_zone(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
5360{
5361 int res = 0;
5362 u64 z_id;
5363 enum sdebug_z_cond zc;
5364 u8 *cmd = scp->cmnd;
5365 struct sdeb_zone_state *zsp;
5366 bool all = cmd[14] & 0x01;
5367 struct sdeb_store_info *sip = devip2sip(devip, false);
5368
5369 if (!sdebug_dev_is_zoned(devip)) {
5370 mk_sense_invalid_opcode(scp);
5371 return check_condition_result;
5372 }
5373 sdeb_meta_write_lock(sip);
5374
5375 if (all) {
5376 /* Check if all closed zones can be open */
5377 if (devip->max_open &&
5378 devip->nr_exp_open + devip->nr_closed > devip->max_open) {
5379 mk_sense_buffer(scp, DATA_PROTECT, INSUFF_RES_ASC,
5380 INSUFF_ZONE_ASCQ);
5381 res = check_condition_result;
5382 goto fini;
5383 }
5384 /* Open all closed zones */
5385 zbc_open_all(devip);
5386 goto fini;
5387 }
5388
5389 /* Open the specified zone */
5390 z_id = get_unaligned_be64(cmd + 2);
5391 if (z_id >= sdebug_capacity) {
5392 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
5393 res = check_condition_result;
5394 goto fini;
5395 }
5396
5397 zsp = zbc_zone(devip, z_id);
5398 if (z_id != zsp->z_start) {
5399 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
5400 res = check_condition_result;
5401 goto fini;
5402 }
5403 if (zbc_zone_is_conv(zsp)) {
5404 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
5405 res = check_condition_result;
5406 goto fini;
5407 }
5408
5409 zc = zsp->z_cond;
5410 if (zc == ZC3_EXPLICIT_OPEN || zc == ZC5_FULL)
5411 goto fini;
5412
5413 if (devip->max_open && devip->nr_exp_open >= devip->max_open) {
5414 mk_sense_buffer(scp, DATA_PROTECT, INSUFF_RES_ASC,
5415 INSUFF_ZONE_ASCQ);
5416 res = check_condition_result;
5417 goto fini;
5418 }
5419
5420 zbc_open_zone(devip, zsp, true);
5421fini:
5422 sdeb_meta_write_unlock(sip);
5423 return res;
5424}
5425
5426static void zbc_close_all(struct sdebug_dev_info *devip)
5427{
5428 unsigned int i;
5429
5430 for (i = 0; i < devip->nr_zones; i++)
5431 zbc_close_zone(devip, &devip->zstate[i]);
5432}
5433
5434static int resp_close_zone(struct scsi_cmnd *scp,
5435 struct sdebug_dev_info *devip)
5436{
5437 int res = 0;
5438 u64 z_id;
5439 u8 *cmd = scp->cmnd;
5440 struct sdeb_zone_state *zsp;
5441 bool all = cmd[14] & 0x01;
5442 struct sdeb_store_info *sip = devip2sip(devip, false);
5443
5444 if (!sdebug_dev_is_zoned(devip)) {
5445 mk_sense_invalid_opcode(scp);
5446 return check_condition_result;
5447 }
5448
5449 sdeb_meta_write_lock(sip);
5450
5451 if (all) {
5452 zbc_close_all(devip);
5453 goto fini;
5454 }
5455
5456 /* Close specified zone */
5457 z_id = get_unaligned_be64(cmd + 2);
5458 if (z_id >= sdebug_capacity) {
5459 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
5460 res = check_condition_result;
5461 goto fini;
5462 }
5463
5464 zsp = zbc_zone(devip, z_id);
5465 if (z_id != zsp->z_start) {
5466 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
5467 res = check_condition_result;
5468 goto fini;
5469 }
5470 if (zbc_zone_is_conv(zsp)) {
5471 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
5472 res = check_condition_result;
5473 goto fini;
5474 }
5475
5476 zbc_close_zone(devip, zsp);
5477fini:
5478 sdeb_meta_write_unlock(sip);
5479 return res;
5480}
5481
5482static void zbc_finish_zone(struct sdebug_dev_info *devip,
5483 struct sdeb_zone_state *zsp, bool empty)
5484{
5485 enum sdebug_z_cond zc = zsp->z_cond;
5486
5487 if (zc == ZC4_CLOSED || zc == ZC2_IMPLICIT_OPEN ||
5488 zc == ZC3_EXPLICIT_OPEN || (empty && zc == ZC1_EMPTY)) {
5489 if (zc == ZC2_IMPLICIT_OPEN || zc == ZC3_EXPLICIT_OPEN)
5490 zbc_close_zone(devip, zsp);
5491 if (zsp->z_cond == ZC4_CLOSED)
5492 devip->nr_closed--;
5493 zsp->z_wp = zsp->z_start + zsp->z_size;
5494 zsp->z_cond = ZC5_FULL;
5495 }
5496}
5497
5498static void zbc_finish_all(struct sdebug_dev_info *devip)
5499{
5500 unsigned int i;
5501
5502 for (i = 0; i < devip->nr_zones; i++)
5503 zbc_finish_zone(devip, &devip->zstate[i], false);
5504}
5505
5506static int resp_finish_zone(struct scsi_cmnd *scp,
5507 struct sdebug_dev_info *devip)
5508{
5509 struct sdeb_zone_state *zsp;
5510 int res = 0;
5511 u64 z_id;
5512 u8 *cmd = scp->cmnd;
5513 bool all = cmd[14] & 0x01;
5514 struct sdeb_store_info *sip = devip2sip(devip, false);
5515
5516 if (!sdebug_dev_is_zoned(devip)) {
5517 mk_sense_invalid_opcode(scp);
5518 return check_condition_result;
5519 }
5520
5521 sdeb_meta_write_lock(sip);
5522
5523 if (all) {
5524 zbc_finish_all(devip);
5525 goto fini;
5526 }
5527
5528 /* Finish the specified zone */
5529 z_id = get_unaligned_be64(cmd + 2);
5530 if (z_id >= sdebug_capacity) {
5531 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
5532 res = check_condition_result;
5533 goto fini;
5534 }
5535
5536 zsp = zbc_zone(devip, z_id);
5537 if (z_id != zsp->z_start) {
5538 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
5539 res = check_condition_result;
5540 goto fini;
5541 }
5542 if (zbc_zone_is_conv(zsp)) {
5543 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
5544 res = check_condition_result;
5545 goto fini;
5546 }
5547
5548 zbc_finish_zone(devip, zsp, true);
5549fini:
5550 sdeb_meta_write_unlock(sip);
5551 return res;
5552}
5553
5554static void zbc_rwp_zone(struct sdebug_dev_info *devip,
5555 struct sdeb_zone_state *zsp)
5556{
5557 enum sdebug_z_cond zc;
5558 struct sdeb_store_info *sip = devip2sip(devip, false);
5559
5560 if (!zbc_zone_is_seq(zsp))
5561 return;
5562
5563 zc = zsp->z_cond;
5564 if (zc == ZC2_IMPLICIT_OPEN || zc == ZC3_EXPLICIT_OPEN)
5565 zbc_close_zone(devip, zsp);
5566
5567 if (zsp->z_cond == ZC4_CLOSED)
5568 devip->nr_closed--;
5569
5570 if (zsp->z_wp > zsp->z_start)
5571 memset(sip->storep + zsp->z_start * sdebug_sector_size, 0,
5572 (zsp->z_wp - zsp->z_start) * sdebug_sector_size);
5573
5574 zsp->z_non_seq_resource = false;
5575 zsp->z_wp = zsp->z_start;
5576 zsp->z_cond = ZC1_EMPTY;
5577}
5578
5579static void zbc_rwp_all(struct sdebug_dev_info *devip)
5580{
5581 unsigned int i;
5582
5583 for (i = 0; i < devip->nr_zones; i++)
5584 zbc_rwp_zone(devip, &devip->zstate[i]);
5585}
5586
5587static int resp_rwp_zone(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
5588{
5589 struct sdeb_zone_state *zsp;
5590 int res = 0;
5591 u64 z_id;
5592 u8 *cmd = scp->cmnd;
5593 bool all = cmd[14] & 0x01;
5594 struct sdeb_store_info *sip = devip2sip(devip, false);
5595
5596 if (!sdebug_dev_is_zoned(devip)) {
5597 mk_sense_invalid_opcode(scp);
5598 return check_condition_result;
5599 }
5600
5601 sdeb_meta_write_lock(sip);
5602
5603 if (all) {
5604 zbc_rwp_all(devip);
5605 goto fini;
5606 }
5607
5608 z_id = get_unaligned_be64(cmd + 2);
5609 if (z_id >= sdebug_capacity) {
5610 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
5611 res = check_condition_result;
5612 goto fini;
5613 }
5614
5615 zsp = zbc_zone(devip, z_id);
5616 if (z_id != zsp->z_start) {
5617 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
5618 res = check_condition_result;
5619 goto fini;
5620 }
5621 if (zbc_zone_is_conv(zsp)) {
5622 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
5623 res = check_condition_result;
5624 goto fini;
5625 }
5626
5627 zbc_rwp_zone(devip, zsp);
5628fini:
5629 sdeb_meta_write_unlock(sip);
5630 return res;
5631}
5632
5633static u32 get_tag(struct scsi_cmnd *cmnd)
5634{
5635 return blk_mq_unique_tag(scsi_cmd_to_rq(cmnd));
5636}
5637
5638/* Queued (deferred) command completions converge here. */
5639static void sdebug_q_cmd_complete(struct sdebug_defer *sd_dp)
5640{
5641 struct sdebug_queued_cmd *sqcp = container_of(sd_dp, struct sdebug_queued_cmd, sd_dp);
5642 unsigned long flags;
5643 struct scsi_cmnd *scp = sqcp->scmd;
5644 struct sdebug_scsi_cmd *sdsc;
5645 bool aborted;
5646
5647 if (sdebug_statistics) {
5648 atomic_inc(&sdebug_completions);
5649 if (raw_smp_processor_id() != sd_dp->issuing_cpu)
5650 atomic_inc(&sdebug_miss_cpus);
5651 }
5652
5653 if (!scp) {
5654 pr_err("scmd=NULL\n");
5655 goto out;
5656 }
5657
5658 sdsc = scsi_cmd_priv(scp);
5659 spin_lock_irqsave(&sdsc->lock, flags);
5660 aborted = sd_dp->aborted;
5661 if (unlikely(aborted))
5662 sd_dp->aborted = false;
5663 ASSIGN_QUEUED_CMD(scp, NULL);
5664
5665 spin_unlock_irqrestore(&sdsc->lock, flags);
5666
5667 if (aborted) {
5668 pr_info("bypassing scsi_done() due to aborted cmd, kicking-off EH\n");
5669 blk_abort_request(scsi_cmd_to_rq(scp));
5670 goto out;
5671 }
5672
5673 scsi_done(scp); /* callback to mid level */
5674out:
5675 sdebug_free_queued_cmd(sqcp);
5676}
5677
5678/* When high resolution timer goes off this function is called. */
5679static enum hrtimer_restart sdebug_q_cmd_hrt_complete(struct hrtimer *timer)
5680{
5681 struct sdebug_defer *sd_dp = container_of(timer, struct sdebug_defer,
5682 hrt);
5683 sdebug_q_cmd_complete(sd_dp);
5684 return HRTIMER_NORESTART;
5685}
5686
5687/* When work queue schedules work, it calls this function. */
5688static void sdebug_q_cmd_wq_complete(struct work_struct *work)
5689{
5690 struct sdebug_defer *sd_dp = container_of(work, struct sdebug_defer,
5691 ew.work);
5692 sdebug_q_cmd_complete(sd_dp);
5693}
5694
5695static bool got_shared_uuid;
5696static uuid_t shared_uuid;
5697
5698static int sdebug_device_create_zones(struct sdebug_dev_info *devip)
5699{
5700 struct sdeb_zone_state *zsp;
5701 sector_t capacity = get_sdebug_capacity();
5702 sector_t conv_capacity;
5703 sector_t zstart = 0;
5704 unsigned int i;
5705
5706 /*
5707 * Set the zone size: if sdeb_zbc_zone_size_mb is not set, figure out
5708 * a zone size allowing for at least 4 zones on the device. Otherwise,
5709 * use the specified zone size checking that at least 2 zones can be
5710 * created for the device.
5711 */
5712 if (!sdeb_zbc_zone_size_mb) {
5713 devip->zsize = (DEF_ZBC_ZONE_SIZE_MB * SZ_1M)
5714 >> ilog2(sdebug_sector_size);
5715 while (capacity < devip->zsize << 2 && devip->zsize >= 2)
5716 devip->zsize >>= 1;
5717 if (devip->zsize < 2) {
5718 pr_err("Device capacity too small\n");
5719 return -EINVAL;
5720 }
5721 } else {
5722 if (!is_power_of_2(sdeb_zbc_zone_size_mb)) {
5723 pr_err("Zone size is not a power of 2\n");
5724 return -EINVAL;
5725 }
5726 devip->zsize = (sdeb_zbc_zone_size_mb * SZ_1M)
5727 >> ilog2(sdebug_sector_size);
5728 if (devip->zsize >= capacity) {
5729 pr_err("Zone size too large for device capacity\n");
5730 return -EINVAL;
5731 }
5732 }
5733
5734 devip->zsize_shift = ilog2(devip->zsize);
5735 devip->nr_zones = (capacity + devip->zsize - 1) >> devip->zsize_shift;
5736
5737 if (sdeb_zbc_zone_cap_mb == 0) {
5738 devip->zcap = devip->zsize;
5739 } else {
5740 devip->zcap = (sdeb_zbc_zone_cap_mb * SZ_1M) >>
5741 ilog2(sdebug_sector_size);
5742 if (devip->zcap > devip->zsize) {
5743 pr_err("Zone capacity too large\n");
5744 return -EINVAL;
5745 }
5746 }
5747
5748 conv_capacity = (sector_t)sdeb_zbc_nr_conv << devip->zsize_shift;
5749 if (conv_capacity >= capacity) {
5750 pr_err("Number of conventional zones too large\n");
5751 return -EINVAL;
5752 }
5753 devip->nr_conv_zones = sdeb_zbc_nr_conv;
5754 devip->nr_seq_zones = ALIGN(capacity - conv_capacity, devip->zsize) >>
5755 devip->zsize_shift;
5756 devip->nr_zones = devip->nr_conv_zones + devip->nr_seq_zones;
5757
5758 /* Add gap zones if zone capacity is smaller than the zone size */
5759 if (devip->zcap < devip->zsize)
5760 devip->nr_zones += devip->nr_seq_zones;
5761
5762 if (devip->zoned) {
5763 /* zbc_max_open_zones can be 0, meaning "not reported" */
5764 if (sdeb_zbc_max_open >= devip->nr_zones - 1)
5765 devip->max_open = (devip->nr_zones - 1) / 2;
5766 else
5767 devip->max_open = sdeb_zbc_max_open;
5768 }
5769
5770 devip->zstate = kcalloc(devip->nr_zones,
5771 sizeof(struct sdeb_zone_state), GFP_KERNEL);
5772 if (!devip->zstate)
5773 return -ENOMEM;
5774
5775 for (i = 0; i < devip->nr_zones; i++) {
5776 zsp = &devip->zstate[i];
5777
5778 zsp->z_start = zstart;
5779
5780 if (i < devip->nr_conv_zones) {
5781 zsp->z_type = ZBC_ZTYPE_CNV;
5782 zsp->z_cond = ZBC_NOT_WRITE_POINTER;
5783 zsp->z_wp = (sector_t)-1;
5784 zsp->z_size =
5785 min_t(u64, devip->zsize, capacity - zstart);
5786 } else if ((zstart & (devip->zsize - 1)) == 0) {
5787 if (devip->zoned)
5788 zsp->z_type = ZBC_ZTYPE_SWR;
5789 else
5790 zsp->z_type = ZBC_ZTYPE_SWP;
5791 zsp->z_cond = ZC1_EMPTY;
5792 zsp->z_wp = zsp->z_start;
5793 zsp->z_size =
5794 min_t(u64, devip->zcap, capacity - zstart);
5795 } else {
5796 zsp->z_type = ZBC_ZTYPE_GAP;
5797 zsp->z_cond = ZBC_NOT_WRITE_POINTER;
5798 zsp->z_wp = (sector_t)-1;
5799 zsp->z_size = min_t(u64, devip->zsize - devip->zcap,
5800 capacity - zstart);
5801 }
5802
5803 WARN_ON_ONCE((int)zsp->z_size <= 0);
5804 zstart += zsp->z_size;
5805 }
5806
5807 return 0;
5808}
5809
5810static struct sdebug_dev_info *sdebug_device_create(
5811 struct sdebug_host_info *sdbg_host, gfp_t flags)
5812{
5813 struct sdebug_dev_info *devip;
5814
5815 devip = kzalloc(sizeof(*devip), flags);
5816 if (devip) {
5817 if (sdebug_uuid_ctl == 1)
5818 uuid_gen(&devip->lu_name);
5819 else if (sdebug_uuid_ctl == 2) {
5820 if (got_shared_uuid)
5821 devip->lu_name = shared_uuid;
5822 else {
5823 uuid_gen(&shared_uuid);
5824 got_shared_uuid = true;
5825 devip->lu_name = shared_uuid;
5826 }
5827 }
5828 devip->sdbg_host = sdbg_host;
5829 if (sdeb_zbc_in_use) {
5830 devip->zoned = sdeb_zbc_model == BLK_ZONED_HM;
5831 if (sdebug_device_create_zones(devip)) {
5832 kfree(devip);
5833 return NULL;
5834 }
5835 } else {
5836 devip->zoned = false;
5837 }
5838 devip->create_ts = ktime_get_boottime();
5839 atomic_set(&devip->stopped, (sdeb_tur_ms_to_ready > 0 ? 2 : 0));
5840 spin_lock_init(&devip->list_lock);
5841 INIT_LIST_HEAD(&devip->inject_err_list);
5842 list_add_tail(&devip->dev_list, &sdbg_host->dev_info_list);
5843 }
5844 return devip;
5845}
5846
5847static struct sdebug_dev_info *find_build_dev_info(struct scsi_device *sdev)
5848{
5849 struct sdebug_host_info *sdbg_host;
5850 struct sdebug_dev_info *open_devip = NULL;
5851 struct sdebug_dev_info *devip;
5852
5853 sdbg_host = shost_to_sdebug_host(sdev->host);
5854
5855 list_for_each_entry(devip, &sdbg_host->dev_info_list, dev_list) {
5856 if ((devip->used) && (devip->channel == sdev->channel) &&
5857 (devip->target == sdev->id) &&
5858 (devip->lun == sdev->lun))
5859 return devip;
5860 else {
5861 if ((!devip->used) && (!open_devip))
5862 open_devip = devip;
5863 }
5864 }
5865 if (!open_devip) { /* try and make a new one */
5866 open_devip = sdebug_device_create(sdbg_host, GFP_ATOMIC);
5867 if (!open_devip) {
5868 pr_err("out of memory at line %d\n", __LINE__);
5869 return NULL;
5870 }
5871 }
5872
5873 open_devip->channel = sdev->channel;
5874 open_devip->target = sdev->id;
5875 open_devip->lun = sdev->lun;
5876 open_devip->sdbg_host = sdbg_host;
5877 set_bit(SDEBUG_UA_POOCCUR, open_devip->uas_bm);
5878 open_devip->used = true;
5879 return open_devip;
5880}
5881
5882static int scsi_debug_slave_alloc(struct scsi_device *sdp)
5883{
5884 if (sdebug_verbose)
5885 pr_info("slave_alloc <%u %u %u %llu>\n",
5886 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
5887
5888 return 0;
5889}
5890
5891static int scsi_debug_slave_configure(struct scsi_device *sdp)
5892{
5893 struct sdebug_dev_info *devip =
5894 (struct sdebug_dev_info *)sdp->hostdata;
5895 struct dentry *dentry;
5896
5897 if (sdebug_verbose)
5898 pr_info("slave_configure <%u %u %u %llu>\n",
5899 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
5900 if (sdp->host->max_cmd_len != SDEBUG_MAX_CMD_LEN)
5901 sdp->host->max_cmd_len = SDEBUG_MAX_CMD_LEN;
5902 if (devip == NULL) {
5903 devip = find_build_dev_info(sdp);
5904 if (devip == NULL)
5905 return 1; /* no resources, will be marked offline */
5906 }
5907 sdp->hostdata = devip;
5908 if (sdebug_no_uld)
5909 sdp->no_uld_attach = 1;
5910 config_cdb_len(sdp);
5911
5912 if (sdebug_allow_restart)
5913 sdp->allow_restart = 1;
5914
5915 devip->debugfs_entry = debugfs_create_dir(dev_name(&sdp->sdev_dev),
5916 sdebug_debugfs_root);
5917 if (IS_ERR_OR_NULL(devip->debugfs_entry))
5918 pr_info("%s: failed to create debugfs directory for device %s\n",
5919 __func__, dev_name(&sdp->sdev_gendev));
5920
5921 dentry = debugfs_create_file("error", 0600, devip->debugfs_entry, sdp,
5922 &sdebug_error_fops);
5923 if (IS_ERR_OR_NULL(dentry))
5924 pr_info("%s: failed to create error file for device %s\n",
5925 __func__, dev_name(&sdp->sdev_gendev));
5926
5927 return 0;
5928}
5929
5930static void scsi_debug_slave_destroy(struct scsi_device *sdp)
5931{
5932 struct sdebug_dev_info *devip =
5933 (struct sdebug_dev_info *)sdp->hostdata;
5934 struct sdebug_err_inject *err;
5935
5936 if (sdebug_verbose)
5937 pr_info("slave_destroy <%u %u %u %llu>\n",
5938 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
5939
5940 if (!devip)
5941 return;
5942
5943 spin_lock(&devip->list_lock);
5944 list_for_each_entry_rcu(err, &devip->inject_err_list, list) {
5945 list_del_rcu(&err->list);
5946 call_rcu(&err->rcu, sdebug_err_free);
5947 }
5948 spin_unlock(&devip->list_lock);
5949
5950 debugfs_remove(devip->debugfs_entry);
5951
5952 /* make this slot available for re-use */
5953 devip->used = false;
5954 sdp->hostdata = NULL;
5955}
5956
5957/* Returns true if we require the queued memory to be freed by the caller. */
5958static bool stop_qc_helper(struct sdebug_defer *sd_dp,
5959 enum sdeb_defer_type defer_t)
5960{
5961 if (defer_t == SDEB_DEFER_HRT) {
5962 int res = hrtimer_try_to_cancel(&sd_dp->hrt);
5963
5964 switch (res) {
5965 case 0: /* Not active, it must have already run */
5966 case -1: /* -1 It's executing the CB */
5967 return false;
5968 case 1: /* Was active, we've now cancelled */
5969 default:
5970 return true;
5971 }
5972 } else if (defer_t == SDEB_DEFER_WQ) {
5973 /* Cancel if pending */
5974 if (cancel_work_sync(&sd_dp->ew.work))
5975 return true;
5976 /* Was not pending, so it must have run */
5977 return false;
5978 } else if (defer_t == SDEB_DEFER_POLL) {
5979 return true;
5980 }
5981
5982 return false;
5983}
5984
5985
5986static bool scsi_debug_stop_cmnd(struct scsi_cmnd *cmnd)
5987{
5988 enum sdeb_defer_type l_defer_t;
5989 struct sdebug_defer *sd_dp;
5990 struct sdebug_scsi_cmd *sdsc = scsi_cmd_priv(cmnd);
5991 struct sdebug_queued_cmd *sqcp = TO_QUEUED_CMD(cmnd);
5992
5993 lockdep_assert_held(&sdsc->lock);
5994
5995 if (!sqcp)
5996 return false;
5997 sd_dp = &sqcp->sd_dp;
5998 l_defer_t = READ_ONCE(sd_dp->defer_t);
5999 ASSIGN_QUEUED_CMD(cmnd, NULL);
6000
6001 if (stop_qc_helper(sd_dp, l_defer_t))
6002 sdebug_free_queued_cmd(sqcp);
6003
6004 return true;
6005}
6006
6007/*
6008 * Called from scsi_debug_abort() only, which is for timed-out cmd.
6009 */
6010static bool scsi_debug_abort_cmnd(struct scsi_cmnd *cmnd)
6011{
6012 struct sdebug_scsi_cmd *sdsc = scsi_cmd_priv(cmnd);
6013 unsigned long flags;
6014 bool res;
6015
6016 spin_lock_irqsave(&sdsc->lock, flags);
6017 res = scsi_debug_stop_cmnd(cmnd);
6018 spin_unlock_irqrestore(&sdsc->lock, flags);
6019
6020 return res;
6021}
6022
6023/*
6024 * All we can do is set the cmnd as internally aborted and wait for it to
6025 * finish. We cannot call scsi_done() as normal completion path may do that.
6026 */
6027static bool sdebug_stop_cmnd(struct request *rq, void *data)
6028{
6029 scsi_debug_abort_cmnd(blk_mq_rq_to_pdu(rq));
6030
6031 return true;
6032}
6033
6034/* Deletes (stops) timers or work queues of all queued commands */
6035static void stop_all_queued(void)
6036{
6037 struct sdebug_host_info *sdhp;
6038
6039 mutex_lock(&sdebug_host_list_mutex);
6040 list_for_each_entry(sdhp, &sdebug_host_list, host_list) {
6041 struct Scsi_Host *shost = sdhp->shost;
6042
6043 blk_mq_tagset_busy_iter(&shost->tag_set, sdebug_stop_cmnd, NULL);
6044 }
6045 mutex_unlock(&sdebug_host_list_mutex);
6046}
6047
6048static int sdebug_fail_abort(struct scsi_cmnd *cmnd)
6049{
6050 struct scsi_device *sdp = cmnd->device;
6051 struct sdebug_dev_info *devip = (struct sdebug_dev_info *)sdp->hostdata;
6052 struct sdebug_err_inject *err;
6053 unsigned char *cmd = cmnd->cmnd;
6054 int ret = 0;
6055
6056 if (devip == NULL)
6057 return 0;
6058
6059 rcu_read_lock();
6060 list_for_each_entry_rcu(err, &devip->inject_err_list, list) {
6061 if (err->type == ERR_ABORT_CMD_FAILED &&
6062 (err->cmd == cmd[0] || err->cmd == 0xff)) {
6063 ret = !!err->cnt;
6064 if (err->cnt < 0)
6065 err->cnt++;
6066
6067 rcu_read_unlock();
6068 return ret;
6069 }
6070 }
6071 rcu_read_unlock();
6072
6073 return 0;
6074}
6075
6076static int scsi_debug_abort(struct scsi_cmnd *SCpnt)
6077{
6078 bool ok = scsi_debug_abort_cmnd(SCpnt);
6079 u8 *cmd = SCpnt->cmnd;
6080 u8 opcode = cmd[0];
6081
6082 ++num_aborts;
6083
6084 if (SDEBUG_OPT_ALL_NOISE & sdebug_opts)
6085 sdev_printk(KERN_INFO, SCpnt->device,
6086 "%s: command%s found\n", __func__,
6087 ok ? "" : " not");
6088
6089 if (sdebug_fail_abort(SCpnt)) {
6090 scmd_printk(KERN_INFO, SCpnt, "fail abort command 0x%x\n",
6091 opcode);
6092 return FAILED;
6093 }
6094
6095 return SUCCESS;
6096}
6097
6098static bool scsi_debug_stop_all_queued_iter(struct request *rq, void *data)
6099{
6100 struct scsi_device *sdp = data;
6101 struct scsi_cmnd *scmd = blk_mq_rq_to_pdu(rq);
6102
6103 if (scmd->device == sdp)
6104 scsi_debug_abort_cmnd(scmd);
6105
6106 return true;
6107}
6108
6109/* Deletes (stops) timers or work queues of all queued commands per sdev */
6110static void scsi_debug_stop_all_queued(struct scsi_device *sdp)
6111{
6112 struct Scsi_Host *shost = sdp->host;
6113
6114 blk_mq_tagset_busy_iter(&shost->tag_set,
6115 scsi_debug_stop_all_queued_iter, sdp);
6116}
6117
6118static int sdebug_fail_lun_reset(struct scsi_cmnd *cmnd)
6119{
6120 struct scsi_device *sdp = cmnd->device;
6121 struct sdebug_dev_info *devip = (struct sdebug_dev_info *)sdp->hostdata;
6122 struct sdebug_err_inject *err;
6123 unsigned char *cmd = cmnd->cmnd;
6124 int ret = 0;
6125
6126 if (devip == NULL)
6127 return 0;
6128
6129 rcu_read_lock();
6130 list_for_each_entry_rcu(err, &devip->inject_err_list, list) {
6131 if (err->type == ERR_LUN_RESET_FAILED &&
6132 (err->cmd == cmd[0] || err->cmd == 0xff)) {
6133 ret = !!err->cnt;
6134 if (err->cnt < 0)
6135 err->cnt++;
6136
6137 rcu_read_unlock();
6138 return ret;
6139 }
6140 }
6141 rcu_read_unlock();
6142
6143 return 0;
6144}
6145
6146static int scsi_debug_device_reset(struct scsi_cmnd *SCpnt)
6147{
6148 struct scsi_device *sdp = SCpnt->device;
6149 struct sdebug_dev_info *devip = sdp->hostdata;
6150 u8 *cmd = SCpnt->cmnd;
6151 u8 opcode = cmd[0];
6152
6153 ++num_dev_resets;
6154
6155 if (SDEBUG_OPT_ALL_NOISE & sdebug_opts)
6156 sdev_printk(KERN_INFO, sdp, "%s\n", __func__);
6157
6158 scsi_debug_stop_all_queued(sdp);
6159 if (devip)
6160 set_bit(SDEBUG_UA_POR, devip->uas_bm);
6161
6162 if (sdebug_fail_lun_reset(SCpnt)) {
6163 scmd_printk(KERN_INFO, SCpnt, "fail lun reset 0x%x\n", opcode);
6164 return FAILED;
6165 }
6166
6167 return SUCCESS;
6168}
6169
6170static int sdebug_fail_target_reset(struct scsi_cmnd *cmnd)
6171{
6172 struct scsi_target *starget = scsi_target(cmnd->device);
6173 struct sdebug_target_info *targetip =
6174 (struct sdebug_target_info *)starget->hostdata;
6175
6176 if (targetip)
6177 return targetip->reset_fail;
6178
6179 return 0;
6180}
6181
6182static int scsi_debug_target_reset(struct scsi_cmnd *SCpnt)
6183{
6184 struct scsi_device *sdp = SCpnt->device;
6185 struct sdebug_host_info *sdbg_host = shost_to_sdebug_host(sdp->host);
6186 struct sdebug_dev_info *devip;
6187 u8 *cmd = SCpnt->cmnd;
6188 u8 opcode = cmd[0];
6189 int k = 0;
6190
6191 ++num_target_resets;
6192 if (SDEBUG_OPT_ALL_NOISE & sdebug_opts)
6193 sdev_printk(KERN_INFO, sdp, "%s\n", __func__);
6194
6195 list_for_each_entry(devip, &sdbg_host->dev_info_list, dev_list) {
6196 if (devip->target == sdp->id) {
6197 set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm);
6198 ++k;
6199 }
6200 }
6201
6202 if (SDEBUG_OPT_RESET_NOISE & sdebug_opts)
6203 sdev_printk(KERN_INFO, sdp,
6204 "%s: %d device(s) found in target\n", __func__, k);
6205
6206 if (sdebug_fail_target_reset(SCpnt)) {
6207 scmd_printk(KERN_INFO, SCpnt, "fail target reset 0x%x\n",
6208 opcode);
6209 return FAILED;
6210 }
6211
6212 return SUCCESS;
6213}
6214
6215static int scsi_debug_bus_reset(struct scsi_cmnd *SCpnt)
6216{
6217 struct scsi_device *sdp = SCpnt->device;
6218 struct sdebug_host_info *sdbg_host = shost_to_sdebug_host(sdp->host);
6219 struct sdebug_dev_info *devip;
6220 int k = 0;
6221
6222 ++num_bus_resets;
6223
6224 if (SDEBUG_OPT_ALL_NOISE & sdebug_opts)
6225 sdev_printk(KERN_INFO, sdp, "%s\n", __func__);
6226
6227 list_for_each_entry(devip, &sdbg_host->dev_info_list, dev_list) {
6228 set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm);
6229 ++k;
6230 }
6231
6232 if (SDEBUG_OPT_RESET_NOISE & sdebug_opts)
6233 sdev_printk(KERN_INFO, sdp,
6234 "%s: %d device(s) found in host\n", __func__, k);
6235 return SUCCESS;
6236}
6237
6238static int scsi_debug_host_reset(struct scsi_cmnd *SCpnt)
6239{
6240 struct sdebug_host_info *sdbg_host;
6241 struct sdebug_dev_info *devip;
6242 int k = 0;
6243
6244 ++num_host_resets;
6245 if (SDEBUG_OPT_ALL_NOISE & sdebug_opts)
6246 sdev_printk(KERN_INFO, SCpnt->device, "%s\n", __func__);
6247 mutex_lock(&sdebug_host_list_mutex);
6248 list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) {
6249 list_for_each_entry(devip, &sdbg_host->dev_info_list,
6250 dev_list) {
6251 set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm);
6252 ++k;
6253 }
6254 }
6255 mutex_unlock(&sdebug_host_list_mutex);
6256 stop_all_queued();
6257 if (SDEBUG_OPT_RESET_NOISE & sdebug_opts)
6258 sdev_printk(KERN_INFO, SCpnt->device,
6259 "%s: %d device(s) found\n", __func__, k);
6260 return SUCCESS;
6261}
6262
6263static void sdebug_build_parts(unsigned char *ramp, unsigned long store_size)
6264{
6265 struct msdos_partition *pp;
6266 int starts[SDEBUG_MAX_PARTS + 2], max_part_secs;
6267 int sectors_per_part, num_sectors, k;
6268 int heads_by_sects, start_sec, end_sec;
6269
6270 /* assume partition table already zeroed */
6271 if ((sdebug_num_parts < 1) || (store_size < 1048576))
6272 return;
6273 if (sdebug_num_parts > SDEBUG_MAX_PARTS) {
6274 sdebug_num_parts = SDEBUG_MAX_PARTS;
6275 pr_warn("reducing partitions to %d\n", SDEBUG_MAX_PARTS);
6276 }
6277 num_sectors = (int)get_sdebug_capacity();
6278 sectors_per_part = (num_sectors - sdebug_sectors_per)
6279 / sdebug_num_parts;
6280 heads_by_sects = sdebug_heads * sdebug_sectors_per;
6281 starts[0] = sdebug_sectors_per;
6282 max_part_secs = sectors_per_part;
6283 for (k = 1; k < sdebug_num_parts; ++k) {
6284 starts[k] = ((k * sectors_per_part) / heads_by_sects)
6285 * heads_by_sects;
6286 if (starts[k] - starts[k - 1] < max_part_secs)
6287 max_part_secs = starts[k] - starts[k - 1];
6288 }
6289 starts[sdebug_num_parts] = num_sectors;
6290 starts[sdebug_num_parts + 1] = 0;
6291
6292 ramp[510] = 0x55; /* magic partition markings */
6293 ramp[511] = 0xAA;
6294 pp = (struct msdos_partition *)(ramp + 0x1be);
6295 for (k = 0; starts[k + 1]; ++k, ++pp) {
6296 start_sec = starts[k];
6297 end_sec = starts[k] + max_part_secs - 1;
6298 pp->boot_ind = 0;
6299
6300 pp->cyl = start_sec / heads_by_sects;
6301 pp->head = (start_sec - (pp->cyl * heads_by_sects))
6302 / sdebug_sectors_per;
6303 pp->sector = (start_sec % sdebug_sectors_per) + 1;
6304
6305 pp->end_cyl = end_sec / heads_by_sects;
6306 pp->end_head = (end_sec - (pp->end_cyl * heads_by_sects))
6307 / sdebug_sectors_per;
6308 pp->end_sector = (end_sec % sdebug_sectors_per) + 1;
6309
6310 pp->start_sect = cpu_to_le32(start_sec);
6311 pp->nr_sects = cpu_to_le32(end_sec - start_sec + 1);
6312 pp->sys_ind = 0x83; /* plain Linux partition */
6313 }
6314}
6315
6316static void block_unblock_all_queues(bool block)
6317{
6318 struct sdebug_host_info *sdhp;
6319
6320 lockdep_assert_held(&sdebug_host_list_mutex);
6321
6322 list_for_each_entry(sdhp, &sdebug_host_list, host_list) {
6323 struct Scsi_Host *shost = sdhp->shost;
6324
6325 if (block)
6326 scsi_block_requests(shost);
6327 else
6328 scsi_unblock_requests(shost);
6329 }
6330}
6331
6332/* Adjust (by rounding down) the sdebug_cmnd_count so abs(every_nth)-1
6333 * commands will be processed normally before triggers occur.
6334 */
6335static void tweak_cmnd_count(void)
6336{
6337 int count, modulo;
6338
6339 modulo = abs(sdebug_every_nth);
6340 if (modulo < 2)
6341 return;
6342
6343 mutex_lock(&sdebug_host_list_mutex);
6344 block_unblock_all_queues(true);
6345 count = atomic_read(&sdebug_cmnd_count);
6346 atomic_set(&sdebug_cmnd_count, (count / modulo) * modulo);
6347 block_unblock_all_queues(false);
6348 mutex_unlock(&sdebug_host_list_mutex);
6349}
6350
6351static void clear_queue_stats(void)
6352{
6353 atomic_set(&sdebug_cmnd_count, 0);
6354 atomic_set(&sdebug_completions, 0);
6355 atomic_set(&sdebug_miss_cpus, 0);
6356 atomic_set(&sdebug_a_tsf, 0);
6357}
6358
6359static bool inject_on_this_cmd(void)
6360{
6361 if (sdebug_every_nth == 0)
6362 return false;
6363 return (atomic_read(&sdebug_cmnd_count) % abs(sdebug_every_nth)) == 0;
6364}
6365
6366#define INCLUSIVE_TIMING_MAX_NS 1000000 /* 1 millisecond */
6367
6368
6369void sdebug_free_queued_cmd(struct sdebug_queued_cmd *sqcp)
6370{
6371 if (sqcp)
6372 kmem_cache_free(queued_cmd_cache, sqcp);
6373}
6374
6375static struct sdebug_queued_cmd *sdebug_alloc_queued_cmd(struct scsi_cmnd *scmd)
6376{
6377 struct sdebug_queued_cmd *sqcp;
6378 struct sdebug_defer *sd_dp;
6379
6380 sqcp = kmem_cache_zalloc(queued_cmd_cache, GFP_ATOMIC);
6381 if (!sqcp)
6382 return NULL;
6383
6384 sd_dp = &sqcp->sd_dp;
6385
6386 hrtimer_init(&sd_dp->hrt, CLOCK_MONOTONIC, HRTIMER_MODE_REL_PINNED);
6387 sd_dp->hrt.function = sdebug_q_cmd_hrt_complete;
6388 INIT_WORK(&sd_dp->ew.work, sdebug_q_cmd_wq_complete);
6389
6390 sqcp->scmd = scmd;
6391
6392 return sqcp;
6393}
6394
6395/* Complete the processing of the thread that queued a SCSI command to this
6396 * driver. It either completes the command by calling cmnd_done() or
6397 * schedules a hr timer or work queue then returns 0. Returns
6398 * SCSI_MLQUEUE_HOST_BUSY if temporarily out of resources.
6399 */
6400static int schedule_resp(struct scsi_cmnd *cmnd, struct sdebug_dev_info *devip,
6401 int scsi_result,
6402 int (*pfp)(struct scsi_cmnd *,
6403 struct sdebug_dev_info *),
6404 int delta_jiff, int ndelay)
6405{
6406 struct request *rq = scsi_cmd_to_rq(cmnd);
6407 bool polled = rq->cmd_flags & REQ_POLLED;
6408 struct sdebug_scsi_cmd *sdsc = scsi_cmd_priv(cmnd);
6409 unsigned long flags;
6410 u64 ns_from_boot = 0;
6411 struct sdebug_queued_cmd *sqcp;
6412 struct scsi_device *sdp;
6413 struct sdebug_defer *sd_dp;
6414
6415 if (unlikely(devip == NULL)) {
6416 if (scsi_result == 0)
6417 scsi_result = DID_NO_CONNECT << 16;
6418 goto respond_in_thread;
6419 }
6420 sdp = cmnd->device;
6421
6422 if (delta_jiff == 0)
6423 goto respond_in_thread;
6424
6425
6426 if (unlikely(sdebug_every_nth && (SDEBUG_OPT_RARE_TSF & sdebug_opts) &&
6427 (scsi_result == 0))) {
6428 int num_in_q = scsi_device_busy(sdp);
6429 int qdepth = cmnd->device->queue_depth;
6430
6431 if ((num_in_q == qdepth) &&
6432 (atomic_inc_return(&sdebug_a_tsf) >=
6433 abs(sdebug_every_nth))) {
6434 atomic_set(&sdebug_a_tsf, 0);
6435 scsi_result = device_qfull_result;
6436
6437 if (unlikely(SDEBUG_OPT_Q_NOISE & sdebug_opts))
6438 sdev_printk(KERN_INFO, sdp, "%s: num_in_q=%d +1, <inject> status: TASK SET FULL\n",
6439 __func__, num_in_q);
6440 }
6441 }
6442
6443 sqcp = sdebug_alloc_queued_cmd(cmnd);
6444 if (!sqcp) {
6445 pr_err("%s no alloc\n", __func__);
6446 return SCSI_MLQUEUE_HOST_BUSY;
6447 }
6448 sd_dp = &sqcp->sd_dp;
6449
6450 if (polled || (ndelay > 0 && ndelay < INCLUSIVE_TIMING_MAX_NS))
6451 ns_from_boot = ktime_get_boottime_ns();
6452
6453 /* one of the resp_*() response functions is called here */
6454 cmnd->result = pfp ? pfp(cmnd, devip) : 0;
6455 if (cmnd->result & SDEG_RES_IMMED_MASK) {
6456 cmnd->result &= ~SDEG_RES_IMMED_MASK;
6457 delta_jiff = ndelay = 0;
6458 }
6459 if (cmnd->result == 0 && scsi_result != 0)
6460 cmnd->result = scsi_result;
6461 if (cmnd->result == 0 && unlikely(sdebug_opts & SDEBUG_OPT_TRANSPORT_ERR)) {
6462 if (atomic_read(&sdeb_inject_pending)) {
6463 mk_sense_buffer(cmnd, ABORTED_COMMAND, TRANSPORT_PROBLEM, ACK_NAK_TO);
6464 atomic_set(&sdeb_inject_pending, 0);
6465 cmnd->result = check_condition_result;
6466 }
6467 }
6468
6469 if (unlikely(sdebug_verbose && cmnd->result))
6470 sdev_printk(KERN_INFO, sdp, "%s: non-zero result=0x%x\n",
6471 __func__, cmnd->result);
6472
6473 if (delta_jiff > 0 || ndelay > 0) {
6474 ktime_t kt;
6475
6476 if (delta_jiff > 0) {
6477 u64 ns = jiffies_to_nsecs(delta_jiff);
6478
6479 if (sdebug_random && ns < U32_MAX) {
6480 ns = get_random_u32_below((u32)ns);
6481 } else if (sdebug_random) {
6482 ns >>= 12; /* scale to 4 usec precision */
6483 if (ns < U32_MAX) /* over 4 hours max */
6484 ns = get_random_u32_below((u32)ns);
6485 ns <<= 12;
6486 }
6487 kt = ns_to_ktime(ns);
6488 } else { /* ndelay has a 4.2 second max */
6489 kt = sdebug_random ? get_random_u32_below((u32)ndelay) :
6490 (u32)ndelay;
6491 if (ndelay < INCLUSIVE_TIMING_MAX_NS) {
6492 u64 d = ktime_get_boottime_ns() - ns_from_boot;
6493
6494 if (kt <= d) { /* elapsed duration >= kt */
6495 /* call scsi_done() from this thread */
6496 sdebug_free_queued_cmd(sqcp);
6497 scsi_done(cmnd);
6498 return 0;
6499 }
6500 /* otherwise reduce kt by elapsed time */
6501 kt -= d;
6502 }
6503 }
6504 if (sdebug_statistics)
6505 sd_dp->issuing_cpu = raw_smp_processor_id();
6506 if (polled) {
6507 spin_lock_irqsave(&sdsc->lock, flags);
6508 sd_dp->cmpl_ts = ktime_add(ns_to_ktime(ns_from_boot), kt);
6509 ASSIGN_QUEUED_CMD(cmnd, sqcp);
6510 WRITE_ONCE(sd_dp->defer_t, SDEB_DEFER_POLL);
6511 spin_unlock_irqrestore(&sdsc->lock, flags);
6512 } else {
6513 /* schedule the invocation of scsi_done() for a later time */
6514 spin_lock_irqsave(&sdsc->lock, flags);
6515 ASSIGN_QUEUED_CMD(cmnd, sqcp);
6516 WRITE_ONCE(sd_dp->defer_t, SDEB_DEFER_HRT);
6517 hrtimer_start(&sd_dp->hrt, kt, HRTIMER_MODE_REL_PINNED);
6518 /*
6519 * The completion handler will try to grab sqcp->lock,
6520 * so there is no chance that the completion handler
6521 * will call scsi_done() until we release the lock
6522 * here (so ok to keep referencing sdsc).
6523 */
6524 spin_unlock_irqrestore(&sdsc->lock, flags);
6525 }
6526 } else { /* jdelay < 0, use work queue */
6527 if (unlikely((sdebug_opts & SDEBUG_OPT_CMD_ABORT) &&
6528 atomic_read(&sdeb_inject_pending))) {
6529 sd_dp->aborted = true;
6530 atomic_set(&sdeb_inject_pending, 0);
6531 sdev_printk(KERN_INFO, sdp, "abort request tag=%#x\n",
6532 blk_mq_unique_tag_to_tag(get_tag(cmnd)));
6533 }
6534
6535 if (sdebug_statistics)
6536 sd_dp->issuing_cpu = raw_smp_processor_id();
6537 if (polled) {
6538 spin_lock_irqsave(&sdsc->lock, flags);
6539 ASSIGN_QUEUED_CMD(cmnd, sqcp);
6540 sd_dp->cmpl_ts = ns_to_ktime(ns_from_boot);
6541 WRITE_ONCE(sd_dp->defer_t, SDEB_DEFER_POLL);
6542 spin_unlock_irqrestore(&sdsc->lock, flags);
6543 } else {
6544 spin_lock_irqsave(&sdsc->lock, flags);
6545 ASSIGN_QUEUED_CMD(cmnd, sqcp);
6546 WRITE_ONCE(sd_dp->defer_t, SDEB_DEFER_WQ);
6547 schedule_work(&sd_dp->ew.work);
6548 spin_unlock_irqrestore(&sdsc->lock, flags);
6549 }
6550 }
6551
6552 return 0;
6553
6554respond_in_thread: /* call back to mid-layer using invocation thread */
6555 cmnd->result = pfp != NULL ? pfp(cmnd, devip) : 0;
6556 cmnd->result &= ~SDEG_RES_IMMED_MASK;
6557 if (cmnd->result == 0 && scsi_result != 0)
6558 cmnd->result = scsi_result;
6559 scsi_done(cmnd);
6560 return 0;
6561}
6562
6563/* Note: The following macros create attribute files in the
6564 /sys/module/scsi_debug/parameters directory. Unfortunately this
6565 driver is unaware of a change and cannot trigger auxiliary actions
6566 as it can when the corresponding attribute in the
6567 /sys/bus/pseudo/drivers/scsi_debug directory is changed.
6568 */
6569module_param_named(add_host, sdebug_add_host, int, S_IRUGO | S_IWUSR);
6570module_param_named(ato, sdebug_ato, int, S_IRUGO);
6571module_param_named(cdb_len, sdebug_cdb_len, int, 0644);
6572module_param_named(clustering, sdebug_clustering, bool, S_IRUGO | S_IWUSR);
6573module_param_named(delay, sdebug_jdelay, int, S_IRUGO | S_IWUSR);
6574module_param_named(dev_size_mb, sdebug_dev_size_mb, int, S_IRUGO);
6575module_param_named(dif, sdebug_dif, int, S_IRUGO);
6576module_param_named(dix, sdebug_dix, int, S_IRUGO);
6577module_param_named(dsense, sdebug_dsense, int, S_IRUGO | S_IWUSR);
6578module_param_named(every_nth, sdebug_every_nth, int, S_IRUGO | S_IWUSR);
6579module_param_named(fake_rw, sdebug_fake_rw, int, S_IRUGO | S_IWUSR);
6580module_param_named(guard, sdebug_guard, uint, S_IRUGO);
6581module_param_named(host_lock, sdebug_host_lock, bool, S_IRUGO | S_IWUSR);
6582module_param_named(host_max_queue, sdebug_host_max_queue, int, S_IRUGO);
6583module_param_string(inq_product, sdebug_inq_product_id,
6584 sizeof(sdebug_inq_product_id), S_IRUGO | S_IWUSR);
6585module_param_string(inq_rev, sdebug_inq_product_rev,
6586 sizeof(sdebug_inq_product_rev), S_IRUGO | S_IWUSR);
6587module_param_string(inq_vendor, sdebug_inq_vendor_id,
6588 sizeof(sdebug_inq_vendor_id), S_IRUGO | S_IWUSR);
6589module_param_named(lbprz, sdebug_lbprz, int, S_IRUGO);
6590module_param_named(lbpu, sdebug_lbpu, int, S_IRUGO);
6591module_param_named(lbpws, sdebug_lbpws, int, S_IRUGO);
6592module_param_named(lbpws10, sdebug_lbpws10, int, S_IRUGO);
6593module_param_named(atomic_wr, sdebug_atomic_wr, int, S_IRUGO);
6594module_param_named(lowest_aligned, sdebug_lowest_aligned, int, S_IRUGO);
6595module_param_named(lun_format, sdebug_lun_am_i, int, S_IRUGO | S_IWUSR);
6596module_param_named(max_luns, sdebug_max_luns, int, S_IRUGO | S_IWUSR);
6597module_param_named(max_queue, sdebug_max_queue, int, S_IRUGO | S_IWUSR);
6598module_param_named(medium_error_count, sdebug_medium_error_count, int,
6599 S_IRUGO | S_IWUSR);
6600module_param_named(medium_error_start, sdebug_medium_error_start, int,
6601 S_IRUGO | S_IWUSR);
6602module_param_named(ndelay, sdebug_ndelay, int, S_IRUGO | S_IWUSR);
6603module_param_named(no_lun_0, sdebug_no_lun_0, int, S_IRUGO | S_IWUSR);
6604module_param_named(no_rwlock, sdebug_no_rwlock, bool, S_IRUGO | S_IWUSR);
6605module_param_named(no_uld, sdebug_no_uld, int, S_IRUGO);
6606module_param_named(num_parts, sdebug_num_parts, int, S_IRUGO);
6607module_param_named(num_tgts, sdebug_num_tgts, int, S_IRUGO | S_IWUSR);
6608module_param_named(opt_blks, sdebug_opt_blks, int, S_IRUGO);
6609module_param_named(opt_xferlen_exp, sdebug_opt_xferlen_exp, int, S_IRUGO);
6610module_param_named(opts, sdebug_opts, int, S_IRUGO | S_IWUSR);
6611module_param_named(per_host_store, sdebug_per_host_store, bool,
6612 S_IRUGO | S_IWUSR);
6613module_param_named(physblk_exp, sdebug_physblk_exp, int, S_IRUGO);
6614module_param_named(ptype, sdebug_ptype, int, S_IRUGO | S_IWUSR);
6615module_param_named(random, sdebug_random, bool, S_IRUGO | S_IWUSR);
6616module_param_named(removable, sdebug_removable, bool, S_IRUGO | S_IWUSR);
6617module_param_named(scsi_level, sdebug_scsi_level, int, S_IRUGO);
6618module_param_named(sector_size, sdebug_sector_size, int, S_IRUGO);
6619module_param_named(statistics, sdebug_statistics, bool, S_IRUGO | S_IWUSR);
6620module_param_named(strict, sdebug_strict, bool, S_IRUGO | S_IWUSR);
6621module_param_named(submit_queues, submit_queues, int, S_IRUGO);
6622module_param_named(poll_queues, poll_queues, int, S_IRUGO);
6623module_param_named(tur_ms_to_ready, sdeb_tur_ms_to_ready, int, S_IRUGO);
6624module_param_named(unmap_alignment, sdebug_unmap_alignment, int, S_IRUGO);
6625module_param_named(unmap_granularity, sdebug_unmap_granularity, int, S_IRUGO);
6626module_param_named(unmap_max_blocks, sdebug_unmap_max_blocks, int, S_IRUGO);
6627module_param_named(unmap_max_desc, sdebug_unmap_max_desc, int, S_IRUGO);
6628module_param_named(atomic_wr_max_length, sdebug_atomic_wr_max_length, int, S_IRUGO);
6629module_param_named(atomic_wr_align, sdebug_atomic_wr_align, int, S_IRUGO);
6630module_param_named(atomic_wr_gran, sdebug_atomic_wr_gran, int, S_IRUGO);
6631module_param_named(atomic_wr_max_length_bndry, sdebug_atomic_wr_max_length_bndry, int, S_IRUGO);
6632module_param_named(atomic_wr_max_bndry, sdebug_atomic_wr_max_bndry, int, S_IRUGO);
6633module_param_named(uuid_ctl, sdebug_uuid_ctl, int, S_IRUGO);
6634module_param_named(virtual_gb, sdebug_virtual_gb, int, S_IRUGO | S_IWUSR);
6635module_param_named(vpd_use_hostno, sdebug_vpd_use_hostno, int,
6636 S_IRUGO | S_IWUSR);
6637module_param_named(wp, sdebug_wp, bool, S_IRUGO | S_IWUSR);
6638module_param_named(write_same_length, sdebug_write_same_length, int,
6639 S_IRUGO | S_IWUSR);
6640module_param_named(zbc, sdeb_zbc_model_s, charp, S_IRUGO);
6641module_param_named(zone_cap_mb, sdeb_zbc_zone_cap_mb, int, S_IRUGO);
6642module_param_named(zone_max_open, sdeb_zbc_max_open, int, S_IRUGO);
6643module_param_named(zone_nr_conv, sdeb_zbc_nr_conv, int, S_IRUGO);
6644module_param_named(zone_size_mb, sdeb_zbc_zone_size_mb, int, S_IRUGO);
6645module_param_named(allow_restart, sdebug_allow_restart, bool, S_IRUGO | S_IWUSR);
6646
6647MODULE_AUTHOR("Eric Youngdale + Douglas Gilbert");
6648MODULE_DESCRIPTION("SCSI debug adapter driver");
6649MODULE_LICENSE("GPL");
6650MODULE_VERSION(SDEBUG_VERSION);
6651
6652MODULE_PARM_DESC(add_host, "add n hosts, in sysfs if negative remove host(s) (def=1)");
6653MODULE_PARM_DESC(ato, "application tag ownership: 0=disk 1=host (def=1)");
6654MODULE_PARM_DESC(cdb_len, "suggest CDB lengths to drivers (def=10)");
6655MODULE_PARM_DESC(clustering, "when set enables larger transfers (def=0)");
6656MODULE_PARM_DESC(delay, "response delay (def=1 jiffy); 0:imm, -1,-2:tiny");
6657MODULE_PARM_DESC(dev_size_mb, "size in MiB of ram shared by devs(def=8)");
6658MODULE_PARM_DESC(dif, "data integrity field type: 0-3 (def=0)");
6659MODULE_PARM_DESC(dix, "data integrity extensions mask (def=0)");
6660MODULE_PARM_DESC(dsense, "use descriptor sense format(def=0 -> fixed)");
6661MODULE_PARM_DESC(every_nth, "timeout every nth command(def=0)");
6662MODULE_PARM_DESC(fake_rw, "fake reads/writes instead of copying (def=0)");
6663MODULE_PARM_DESC(guard, "protection checksum: 0=crc, 1=ip (def=0)");
6664MODULE_PARM_DESC(host_lock, "host_lock is ignored (def=0)");
6665MODULE_PARM_DESC(host_max_queue,
6666 "host max # of queued cmds (0 to max(def) [max_queue fixed equal for !0])");
6667MODULE_PARM_DESC(inq_product, "SCSI INQUIRY product string (def=\"scsi_debug\")");
6668MODULE_PARM_DESC(inq_rev, "SCSI INQUIRY revision string (def=\""
6669 SDEBUG_VERSION "\")");
6670MODULE_PARM_DESC(inq_vendor, "SCSI INQUIRY vendor string (def=\"Linux\")");
6671MODULE_PARM_DESC(lbprz,
6672 "on read unmapped LBs return 0 when 1 (def), return 0xff when 2");
6673MODULE_PARM_DESC(lbpu, "enable LBP, support UNMAP command (def=0)");
6674MODULE_PARM_DESC(lbpws, "enable LBP, support WRITE SAME(16) with UNMAP bit (def=0)");
6675MODULE_PARM_DESC(lbpws10, "enable LBP, support WRITE SAME(10) with UNMAP bit (def=0)");
6676MODULE_PARM_DESC(atomic_write, "enable ATOMIC WRITE support, support WRITE ATOMIC(16) (def=0)");
6677MODULE_PARM_DESC(lowest_aligned, "lowest aligned lba (def=0)");
6678MODULE_PARM_DESC(lun_format, "LUN format: 0->peripheral (def); 1 --> flat address method");
6679MODULE_PARM_DESC(max_luns, "number of LUNs per target to simulate(def=1)");
6680MODULE_PARM_DESC(max_queue, "max number of queued commands (1 to max(def))");
6681MODULE_PARM_DESC(medium_error_count, "count of sectors to return follow on MEDIUM error");
6682MODULE_PARM_DESC(medium_error_start, "starting sector number to return MEDIUM error");
6683MODULE_PARM_DESC(ndelay, "response delay in nanoseconds (def=0 -> ignore)");
6684MODULE_PARM_DESC(no_lun_0, "no LU number 0 (def=0 -> have lun 0)");
6685MODULE_PARM_DESC(no_rwlock, "don't protect user data reads+writes (def=0)");
6686MODULE_PARM_DESC(no_uld, "stop ULD (e.g. sd driver) attaching (def=0))");
6687MODULE_PARM_DESC(num_parts, "number of partitions(def=0)");
6688MODULE_PARM_DESC(num_tgts, "number of targets per host to simulate(def=1)");
6689MODULE_PARM_DESC(opt_blks, "optimal transfer length in blocks (def=1024)");
6690MODULE_PARM_DESC(opt_xferlen_exp, "optimal transfer length granularity exponent (def=physblk_exp)");
6691MODULE_PARM_DESC(opts, "1->noise, 2->medium_err, 4->timeout, 8->recovered_err... (def=0)");
6692MODULE_PARM_DESC(per_host_store, "If set, next positive add_host will get new store (def=0)");
6693MODULE_PARM_DESC(physblk_exp, "physical block exponent (def=0)");
6694MODULE_PARM_DESC(poll_queues, "support for iouring iopoll queues (1 to max(submit_queues - 1))");
6695MODULE_PARM_DESC(ptype, "SCSI peripheral type(def=0[disk])");
6696MODULE_PARM_DESC(random, "If set, uniformly randomize command duration between 0 and delay_in_ns");
6697MODULE_PARM_DESC(removable, "claim to have removable media (def=0)");
6698MODULE_PARM_DESC(scsi_level, "SCSI level to simulate(def=7[SPC-5])");
6699MODULE_PARM_DESC(sector_size, "logical block size in bytes (def=512)");
6700MODULE_PARM_DESC(statistics, "collect statistics on commands, queues (def=0)");
6701MODULE_PARM_DESC(strict, "stricter checks: reserved field in cdb (def=0)");
6702MODULE_PARM_DESC(submit_queues, "support for block multi-queue (def=1)");
6703MODULE_PARM_DESC(tur_ms_to_ready, "TEST UNIT READY millisecs before initial good status (def=0)");
6704MODULE_PARM_DESC(unmap_alignment, "lowest aligned thin provisioning lba (def=0)");
6705MODULE_PARM_DESC(unmap_granularity, "thin provisioning granularity in blocks (def=1)");
6706MODULE_PARM_DESC(unmap_max_blocks, "max # of blocks can be unmapped in one cmd (def=0xffffffff)");
6707MODULE_PARM_DESC(unmap_max_desc, "max # of ranges that can be unmapped in one cmd (def=256)");
6708MODULE_PARM_DESC(atomic_wr_max_length, "max # of blocks can be atomically written in one cmd (def=8192)");
6709MODULE_PARM_DESC(atomic_wr_align, "minimum alignment of atomic write in blocks (def=2)");
6710MODULE_PARM_DESC(atomic_wr_gran, "minimum granularity of atomic write in blocks (def=2)");
6711MODULE_PARM_DESC(atomic_wr_max_length_bndry, "max # of blocks can be atomically written in one cmd with boundary set (def=8192)");
6712MODULE_PARM_DESC(atomic_wr_max_bndry, "max # boundaries per atomic write (def=128)");
6713MODULE_PARM_DESC(uuid_ctl,
6714 "1->use uuid for lu name, 0->don't, 2->all use same (def=0)");
6715MODULE_PARM_DESC(virtual_gb, "virtual gigabyte (GiB) size (def=0 -> use dev_size_mb)");
6716MODULE_PARM_DESC(vpd_use_hostno, "0 -> dev ids ignore hostno (def=1 -> unique dev ids)");
6717MODULE_PARM_DESC(wp, "Write Protect (def=0)");
6718MODULE_PARM_DESC(write_same_length, "Maximum blocks per WRITE SAME cmd (def=0xffff)");
6719MODULE_PARM_DESC(zbc, "'none' [0]; 'aware' [1]; 'managed' [2] (def=0). Can have 'host-' prefix");
6720MODULE_PARM_DESC(zone_cap_mb, "Zone capacity in MiB (def=zone size)");
6721MODULE_PARM_DESC(zone_max_open, "Maximum number of open zones; [0] for no limit (def=auto)");
6722MODULE_PARM_DESC(zone_nr_conv, "Number of conventional zones (def=1)");
6723MODULE_PARM_DESC(zone_size_mb, "Zone size in MiB (def=auto)");
6724MODULE_PARM_DESC(allow_restart, "Set scsi_device's allow_restart flag(def=0)");
6725
6726#define SDEBUG_INFO_LEN 256
6727static char sdebug_info[SDEBUG_INFO_LEN];
6728
6729static const char *scsi_debug_info(struct Scsi_Host *shp)
6730{
6731 int k;
6732
6733 k = scnprintf(sdebug_info, SDEBUG_INFO_LEN, "%s: version %s [%s]\n",
6734 my_name, SDEBUG_VERSION, sdebug_version_date);
6735 if (k >= (SDEBUG_INFO_LEN - 1))
6736 return sdebug_info;
6737 scnprintf(sdebug_info + k, SDEBUG_INFO_LEN - k,
6738 " dev_size_mb=%d, opts=0x%x, submit_queues=%d, %s=%d",
6739 sdebug_dev_size_mb, sdebug_opts, submit_queues,
6740 "statistics", (int)sdebug_statistics);
6741 return sdebug_info;
6742}
6743
6744/* 'echo <val> > /proc/scsi/scsi_debug/<host_id>' writes to opts */
6745static int scsi_debug_write_info(struct Scsi_Host *host, char *buffer,
6746 int length)
6747{
6748 char arr[16];
6749 int opts;
6750 int minLen = length > 15 ? 15 : length;
6751
6752 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
6753 return -EACCES;
6754 memcpy(arr, buffer, minLen);
6755 arr[minLen] = '\0';
6756 if (1 != sscanf(arr, "%d", &opts))
6757 return -EINVAL;
6758 sdebug_opts = opts;
6759 sdebug_verbose = !!(SDEBUG_OPT_NOISE & opts);
6760 sdebug_any_injecting_opt = !!(SDEBUG_OPT_ALL_INJECTING & opts);
6761 if (sdebug_every_nth != 0)
6762 tweak_cmnd_count();
6763 return length;
6764}
6765
6766struct sdebug_submit_queue_data {
6767 int *first;
6768 int *last;
6769 int queue_num;
6770};
6771
6772static bool sdebug_submit_queue_iter(struct request *rq, void *opaque)
6773{
6774 struct sdebug_submit_queue_data *data = opaque;
6775 u32 unique_tag = blk_mq_unique_tag(rq);
6776 u16 hwq = blk_mq_unique_tag_to_hwq(unique_tag);
6777 u16 tag = blk_mq_unique_tag_to_tag(unique_tag);
6778 int queue_num = data->queue_num;
6779
6780 if (hwq != queue_num)
6781 return true;
6782
6783 /* Rely on iter'ing in ascending tag order */
6784 if (*data->first == -1)
6785 *data->first = *data->last = tag;
6786 else
6787 *data->last = tag;
6788
6789 return true;
6790}
6791
6792/* Output seen with 'cat /proc/scsi/scsi_debug/<host_id>'. It will be the
6793 * same for each scsi_debug host (if more than one). Some of the counters
6794 * output are not atomics so might be inaccurate in a busy system. */
6795static int scsi_debug_show_info(struct seq_file *m, struct Scsi_Host *host)
6796{
6797 struct sdebug_host_info *sdhp;
6798 int j;
6799
6800 seq_printf(m, "scsi_debug adapter driver, version %s [%s]\n",
6801 SDEBUG_VERSION, sdebug_version_date);
6802 seq_printf(m, "num_tgts=%d, %ssize=%d MB, opts=0x%x, every_nth=%d\n",
6803 sdebug_num_tgts, "shared (ram) ", sdebug_dev_size_mb,
6804 sdebug_opts, sdebug_every_nth);
6805 seq_printf(m, "delay=%d, ndelay=%d, max_luns=%d, sector_size=%d %s\n",
6806 sdebug_jdelay, sdebug_ndelay, sdebug_max_luns,
6807 sdebug_sector_size, "bytes");
6808 seq_printf(m, "cylinders=%d, heads=%d, sectors=%d, command aborts=%d\n",
6809 sdebug_cylinders_per, sdebug_heads, sdebug_sectors_per,
6810 num_aborts);
6811 seq_printf(m, "RESETs: device=%d, target=%d, bus=%d, host=%d\n",
6812 num_dev_resets, num_target_resets, num_bus_resets,
6813 num_host_resets);
6814 seq_printf(m, "dix_reads=%d, dix_writes=%d, dif_errors=%d\n",
6815 dix_reads, dix_writes, dif_errors);
6816 seq_printf(m, "usec_in_jiffy=%lu, statistics=%d\n", TICK_NSEC / 1000,
6817 sdebug_statistics);
6818 seq_printf(m, "cmnd_count=%d, completions=%d, %s=%d, a_tsf=%d, mq_polls=%d\n",
6819 atomic_read(&sdebug_cmnd_count),
6820 atomic_read(&sdebug_completions),
6821 "miss_cpus", atomic_read(&sdebug_miss_cpus),
6822 atomic_read(&sdebug_a_tsf),
6823 atomic_read(&sdeb_mq_poll_count));
6824
6825 seq_printf(m, "submit_queues=%d\n", submit_queues);
6826 for (j = 0; j < submit_queues; ++j) {
6827 int f = -1, l = -1;
6828 struct sdebug_submit_queue_data data = {
6829 .queue_num = j,
6830 .first = &f,
6831 .last = &l,
6832 };
6833 seq_printf(m, " queue %d:\n", j);
6834 blk_mq_tagset_busy_iter(&host->tag_set, sdebug_submit_queue_iter,
6835 &data);
6836 if (f >= 0) {
6837 seq_printf(m, " in_use_bm BUSY: %s: %d,%d\n",
6838 "first,last bits", f, l);
6839 }
6840 }
6841
6842 seq_printf(m, "this host_no=%d\n", host->host_no);
6843 if (!xa_empty(per_store_ap)) {
6844 bool niu;
6845 int idx;
6846 unsigned long l_idx;
6847 struct sdeb_store_info *sip;
6848
6849 seq_puts(m, "\nhost list:\n");
6850 j = 0;
6851 list_for_each_entry(sdhp, &sdebug_host_list, host_list) {
6852 idx = sdhp->si_idx;
6853 seq_printf(m, " %d: host_no=%d, si_idx=%d\n", j,
6854 sdhp->shost->host_no, idx);
6855 ++j;
6856 }
6857 seq_printf(m, "\nper_store array [most_recent_idx=%d]:\n",
6858 sdeb_most_recent_idx);
6859 j = 0;
6860 xa_for_each(per_store_ap, l_idx, sip) {
6861 niu = xa_get_mark(per_store_ap, l_idx,
6862 SDEB_XA_NOT_IN_USE);
6863 idx = (int)l_idx;
6864 seq_printf(m, " %d: idx=%d%s\n", j, idx,
6865 (niu ? " not_in_use" : ""));
6866 ++j;
6867 }
6868 }
6869 return 0;
6870}
6871
6872static ssize_t delay_show(struct device_driver *ddp, char *buf)
6873{
6874 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_jdelay);
6875}
6876/* Returns -EBUSY if jdelay is being changed and commands are queued. The unit
6877 * of delay is jiffies.
6878 */
6879static ssize_t delay_store(struct device_driver *ddp, const char *buf,
6880 size_t count)
6881{
6882 int jdelay, res;
6883
6884 if (count > 0 && sscanf(buf, "%d", &jdelay) == 1) {
6885 res = count;
6886 if (sdebug_jdelay != jdelay) {
6887 struct sdebug_host_info *sdhp;
6888
6889 mutex_lock(&sdebug_host_list_mutex);
6890 block_unblock_all_queues(true);
6891
6892 list_for_each_entry(sdhp, &sdebug_host_list, host_list) {
6893 struct Scsi_Host *shost = sdhp->shost;
6894
6895 if (scsi_host_busy(shost)) {
6896 res = -EBUSY; /* queued commands */
6897 break;
6898 }
6899 }
6900 if (res > 0) {
6901 sdebug_jdelay = jdelay;
6902 sdebug_ndelay = 0;
6903 }
6904 block_unblock_all_queues(false);
6905 mutex_unlock(&sdebug_host_list_mutex);
6906 }
6907 return res;
6908 }
6909 return -EINVAL;
6910}
6911static DRIVER_ATTR_RW(delay);
6912
6913static ssize_t ndelay_show(struct device_driver *ddp, char *buf)
6914{
6915 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_ndelay);
6916}
6917/* Returns -EBUSY if ndelay is being changed and commands are queued */
6918/* If > 0 and accepted then sdebug_jdelay is set to JDELAY_OVERRIDDEN */
6919static ssize_t ndelay_store(struct device_driver *ddp, const char *buf,
6920 size_t count)
6921{
6922 int ndelay, res;
6923
6924 if ((count > 0) && (1 == sscanf(buf, "%d", &ndelay)) &&
6925 (ndelay >= 0) && (ndelay < (1000 * 1000 * 1000))) {
6926 res = count;
6927 if (sdebug_ndelay != ndelay) {
6928 struct sdebug_host_info *sdhp;
6929
6930 mutex_lock(&sdebug_host_list_mutex);
6931 block_unblock_all_queues(true);
6932
6933 list_for_each_entry(sdhp, &sdebug_host_list, host_list) {
6934 struct Scsi_Host *shost = sdhp->shost;
6935
6936 if (scsi_host_busy(shost)) {
6937 res = -EBUSY; /* queued commands */
6938 break;
6939 }
6940 }
6941
6942 if (res > 0) {
6943 sdebug_ndelay = ndelay;
6944 sdebug_jdelay = ndelay ? JDELAY_OVERRIDDEN
6945 : DEF_JDELAY;
6946 }
6947 block_unblock_all_queues(false);
6948 mutex_unlock(&sdebug_host_list_mutex);
6949 }
6950 return res;
6951 }
6952 return -EINVAL;
6953}
6954static DRIVER_ATTR_RW(ndelay);
6955
6956static ssize_t opts_show(struct device_driver *ddp, char *buf)
6957{
6958 return scnprintf(buf, PAGE_SIZE, "0x%x\n", sdebug_opts);
6959}
6960
6961static ssize_t opts_store(struct device_driver *ddp, const char *buf,
6962 size_t count)
6963{
6964 int opts;
6965 char work[20];
6966
6967 if (sscanf(buf, "%10s", work) == 1) {
6968 if (strncasecmp(work, "0x", 2) == 0) {
6969 if (kstrtoint(work + 2, 16, &opts) == 0)
6970 goto opts_done;
6971 } else {
6972 if (kstrtoint(work, 10, &opts) == 0)
6973 goto opts_done;
6974 }
6975 }
6976 return -EINVAL;
6977opts_done:
6978 sdebug_opts = opts;
6979 sdebug_verbose = !!(SDEBUG_OPT_NOISE & opts);
6980 sdebug_any_injecting_opt = !!(SDEBUG_OPT_ALL_INJECTING & opts);
6981 tweak_cmnd_count();
6982 return count;
6983}
6984static DRIVER_ATTR_RW(opts);
6985
6986static ssize_t ptype_show(struct device_driver *ddp, char *buf)
6987{
6988 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_ptype);
6989}
6990static ssize_t ptype_store(struct device_driver *ddp, const char *buf,
6991 size_t count)
6992{
6993 int n;
6994
6995 /* Cannot change from or to TYPE_ZBC with sysfs */
6996 if (sdebug_ptype == TYPE_ZBC)
6997 return -EINVAL;
6998
6999 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
7000 if (n == TYPE_ZBC)
7001 return -EINVAL;
7002 sdebug_ptype = n;
7003 return count;
7004 }
7005 return -EINVAL;
7006}
7007static DRIVER_ATTR_RW(ptype);
7008
7009static ssize_t dsense_show(struct device_driver *ddp, char *buf)
7010{
7011 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_dsense);
7012}
7013static ssize_t dsense_store(struct device_driver *ddp, const char *buf,
7014 size_t count)
7015{
7016 int n;
7017
7018 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
7019 sdebug_dsense = n;
7020 return count;
7021 }
7022 return -EINVAL;
7023}
7024static DRIVER_ATTR_RW(dsense);
7025
7026static ssize_t fake_rw_show(struct device_driver *ddp, char *buf)
7027{
7028 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_fake_rw);
7029}
7030static ssize_t fake_rw_store(struct device_driver *ddp, const char *buf,
7031 size_t count)
7032{
7033 int n, idx;
7034
7035 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
7036 bool want_store = (n == 0);
7037 struct sdebug_host_info *sdhp;
7038
7039 n = (n > 0);
7040 sdebug_fake_rw = (sdebug_fake_rw > 0);
7041 if (sdebug_fake_rw == n)
7042 return count; /* not transitioning so do nothing */
7043
7044 if (want_store) { /* 1 --> 0 transition, set up store */
7045 if (sdeb_first_idx < 0) {
7046 idx = sdebug_add_store();
7047 if (idx < 0)
7048 return idx;
7049 } else {
7050 idx = sdeb_first_idx;
7051 xa_clear_mark(per_store_ap, idx,
7052 SDEB_XA_NOT_IN_USE);
7053 }
7054 /* make all hosts use same store */
7055 list_for_each_entry(sdhp, &sdebug_host_list,
7056 host_list) {
7057 if (sdhp->si_idx != idx) {
7058 xa_set_mark(per_store_ap, sdhp->si_idx,
7059 SDEB_XA_NOT_IN_USE);
7060 sdhp->si_idx = idx;
7061 }
7062 }
7063 sdeb_most_recent_idx = idx;
7064 } else { /* 0 --> 1 transition is trigger for shrink */
7065 sdebug_erase_all_stores(true /* apart from first */);
7066 }
7067 sdebug_fake_rw = n;
7068 return count;
7069 }
7070 return -EINVAL;
7071}
7072static DRIVER_ATTR_RW(fake_rw);
7073
7074static ssize_t no_lun_0_show(struct device_driver *ddp, char *buf)
7075{
7076 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_no_lun_0);
7077}
7078static ssize_t no_lun_0_store(struct device_driver *ddp, const char *buf,
7079 size_t count)
7080{
7081 int n;
7082
7083 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
7084 sdebug_no_lun_0 = n;
7085 return count;
7086 }
7087 return -EINVAL;
7088}
7089static DRIVER_ATTR_RW(no_lun_0);
7090
7091static ssize_t num_tgts_show(struct device_driver *ddp, char *buf)
7092{
7093 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_num_tgts);
7094}
7095static ssize_t num_tgts_store(struct device_driver *ddp, const char *buf,
7096 size_t count)
7097{
7098 int n;
7099
7100 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
7101 sdebug_num_tgts = n;
7102 sdebug_max_tgts_luns();
7103 return count;
7104 }
7105 return -EINVAL;
7106}
7107static DRIVER_ATTR_RW(num_tgts);
7108
7109static ssize_t dev_size_mb_show(struct device_driver *ddp, char *buf)
7110{
7111 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_dev_size_mb);
7112}
7113static DRIVER_ATTR_RO(dev_size_mb);
7114
7115static ssize_t per_host_store_show(struct device_driver *ddp, char *buf)
7116{
7117 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_per_host_store);
7118}
7119
7120static ssize_t per_host_store_store(struct device_driver *ddp, const char *buf,
7121 size_t count)
7122{
7123 bool v;
7124
7125 if (kstrtobool(buf, &v))
7126 return -EINVAL;
7127
7128 sdebug_per_host_store = v;
7129 return count;
7130}
7131static DRIVER_ATTR_RW(per_host_store);
7132
7133static ssize_t num_parts_show(struct device_driver *ddp, char *buf)
7134{
7135 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_num_parts);
7136}
7137static DRIVER_ATTR_RO(num_parts);
7138
7139static ssize_t every_nth_show(struct device_driver *ddp, char *buf)
7140{
7141 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_every_nth);
7142}
7143static ssize_t every_nth_store(struct device_driver *ddp, const char *buf,
7144 size_t count)
7145{
7146 int nth;
7147 char work[20];
7148
7149 if (sscanf(buf, "%10s", work) == 1) {
7150 if (strncasecmp(work, "0x", 2) == 0) {
7151 if (kstrtoint(work + 2, 16, &nth) == 0)
7152 goto every_nth_done;
7153 } else {
7154 if (kstrtoint(work, 10, &nth) == 0)
7155 goto every_nth_done;
7156 }
7157 }
7158 return -EINVAL;
7159
7160every_nth_done:
7161 sdebug_every_nth = nth;
7162 if (nth && !sdebug_statistics) {
7163 pr_info("every_nth needs statistics=1, set it\n");
7164 sdebug_statistics = true;
7165 }
7166 tweak_cmnd_count();
7167 return count;
7168}
7169static DRIVER_ATTR_RW(every_nth);
7170
7171static ssize_t lun_format_show(struct device_driver *ddp, char *buf)
7172{
7173 return scnprintf(buf, PAGE_SIZE, "%d\n", (int)sdebug_lun_am);
7174}
7175static ssize_t lun_format_store(struct device_driver *ddp, const char *buf,
7176 size_t count)
7177{
7178 int n;
7179 bool changed;
7180
7181 if (kstrtoint(buf, 0, &n))
7182 return -EINVAL;
7183 if (n >= 0) {
7184 if (n > (int)SAM_LUN_AM_FLAT) {
7185 pr_warn("only LUN address methods 0 and 1 are supported\n");
7186 return -EINVAL;
7187 }
7188 changed = ((int)sdebug_lun_am != n);
7189 sdebug_lun_am = n;
7190 if (changed && sdebug_scsi_level >= 5) { /* >= SPC-3 */
7191 struct sdebug_host_info *sdhp;
7192 struct sdebug_dev_info *dp;
7193
7194 mutex_lock(&sdebug_host_list_mutex);
7195 list_for_each_entry(sdhp, &sdebug_host_list, host_list) {
7196 list_for_each_entry(dp, &sdhp->dev_info_list, dev_list) {
7197 set_bit(SDEBUG_UA_LUNS_CHANGED, dp->uas_bm);
7198 }
7199 }
7200 mutex_unlock(&sdebug_host_list_mutex);
7201 }
7202 return count;
7203 }
7204 return -EINVAL;
7205}
7206static DRIVER_ATTR_RW(lun_format);
7207
7208static ssize_t max_luns_show(struct device_driver *ddp, char *buf)
7209{
7210 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_max_luns);
7211}
7212static ssize_t max_luns_store(struct device_driver *ddp, const char *buf,
7213 size_t count)
7214{
7215 int n;
7216 bool changed;
7217
7218 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
7219 if (n > 256) {
7220 pr_warn("max_luns can be no more than 256\n");
7221 return -EINVAL;
7222 }
7223 changed = (sdebug_max_luns != n);
7224 sdebug_max_luns = n;
7225 sdebug_max_tgts_luns();
7226 if (changed && (sdebug_scsi_level >= 5)) { /* >= SPC-3 */
7227 struct sdebug_host_info *sdhp;
7228 struct sdebug_dev_info *dp;
7229
7230 mutex_lock(&sdebug_host_list_mutex);
7231 list_for_each_entry(sdhp, &sdebug_host_list,
7232 host_list) {
7233 list_for_each_entry(dp, &sdhp->dev_info_list,
7234 dev_list) {
7235 set_bit(SDEBUG_UA_LUNS_CHANGED,
7236 dp->uas_bm);
7237 }
7238 }
7239 mutex_unlock(&sdebug_host_list_mutex);
7240 }
7241 return count;
7242 }
7243 return -EINVAL;
7244}
7245static DRIVER_ATTR_RW(max_luns);
7246
7247static ssize_t max_queue_show(struct device_driver *ddp, char *buf)
7248{
7249 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_max_queue);
7250}
7251/* N.B. max_queue can be changed while there are queued commands. In flight
7252 * commands beyond the new max_queue will be completed. */
7253static ssize_t max_queue_store(struct device_driver *ddp, const char *buf,
7254 size_t count)
7255{
7256 int n;
7257
7258 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n > 0) &&
7259 (n <= SDEBUG_CANQUEUE) &&
7260 (sdebug_host_max_queue == 0)) {
7261 mutex_lock(&sdebug_host_list_mutex);
7262
7263 /* We may only change sdebug_max_queue when we have no shosts */
7264 if (list_empty(&sdebug_host_list))
7265 sdebug_max_queue = n;
7266 else
7267 count = -EBUSY;
7268 mutex_unlock(&sdebug_host_list_mutex);
7269 return count;
7270 }
7271 return -EINVAL;
7272}
7273static DRIVER_ATTR_RW(max_queue);
7274
7275static ssize_t host_max_queue_show(struct device_driver *ddp, char *buf)
7276{
7277 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_host_max_queue);
7278}
7279
7280static ssize_t no_rwlock_show(struct device_driver *ddp, char *buf)
7281{
7282 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_no_rwlock);
7283}
7284
7285static ssize_t no_rwlock_store(struct device_driver *ddp, const char *buf, size_t count)
7286{
7287 bool v;
7288
7289 if (kstrtobool(buf, &v))
7290 return -EINVAL;
7291
7292 sdebug_no_rwlock = v;
7293 return count;
7294}
7295static DRIVER_ATTR_RW(no_rwlock);
7296
7297/*
7298 * Since this is used for .can_queue, and we get the hc_idx tag from the bitmap
7299 * in range [0, sdebug_host_max_queue), we can't change it.
7300 */
7301static DRIVER_ATTR_RO(host_max_queue);
7302
7303static ssize_t no_uld_show(struct device_driver *ddp, char *buf)
7304{
7305 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_no_uld);
7306}
7307static DRIVER_ATTR_RO(no_uld);
7308
7309static ssize_t scsi_level_show(struct device_driver *ddp, char *buf)
7310{
7311 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_scsi_level);
7312}
7313static DRIVER_ATTR_RO(scsi_level);
7314
7315static ssize_t virtual_gb_show(struct device_driver *ddp, char *buf)
7316{
7317 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_virtual_gb);
7318}
7319static ssize_t virtual_gb_store(struct device_driver *ddp, const char *buf,
7320 size_t count)
7321{
7322 int n;
7323 bool changed;
7324
7325 /* Ignore capacity change for ZBC drives for now */
7326 if (sdeb_zbc_in_use)
7327 return -ENOTSUPP;
7328
7329 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
7330 changed = (sdebug_virtual_gb != n);
7331 sdebug_virtual_gb = n;
7332 sdebug_capacity = get_sdebug_capacity();
7333 if (changed) {
7334 struct sdebug_host_info *sdhp;
7335 struct sdebug_dev_info *dp;
7336
7337 mutex_lock(&sdebug_host_list_mutex);
7338 list_for_each_entry(sdhp, &sdebug_host_list,
7339 host_list) {
7340 list_for_each_entry(dp, &sdhp->dev_info_list,
7341 dev_list) {
7342 set_bit(SDEBUG_UA_CAPACITY_CHANGED,
7343 dp->uas_bm);
7344 }
7345 }
7346 mutex_unlock(&sdebug_host_list_mutex);
7347 }
7348 return count;
7349 }
7350 return -EINVAL;
7351}
7352static DRIVER_ATTR_RW(virtual_gb);
7353
7354static ssize_t add_host_show(struct device_driver *ddp, char *buf)
7355{
7356 /* absolute number of hosts currently active is what is shown */
7357 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_num_hosts);
7358}
7359
7360static ssize_t add_host_store(struct device_driver *ddp, const char *buf,
7361 size_t count)
7362{
7363 bool found;
7364 unsigned long idx;
7365 struct sdeb_store_info *sip;
7366 bool want_phs = (sdebug_fake_rw == 0) && sdebug_per_host_store;
7367 int delta_hosts;
7368
7369 if (sscanf(buf, "%d", &delta_hosts) != 1)
7370 return -EINVAL;
7371 if (delta_hosts > 0) {
7372 do {
7373 found = false;
7374 if (want_phs) {
7375 xa_for_each_marked(per_store_ap, idx, sip,
7376 SDEB_XA_NOT_IN_USE) {
7377 sdeb_most_recent_idx = (int)idx;
7378 found = true;
7379 break;
7380 }
7381 if (found) /* re-use case */
7382 sdebug_add_host_helper((int)idx);
7383 else
7384 sdebug_do_add_host(true);
7385 } else {
7386 sdebug_do_add_host(false);
7387 }
7388 } while (--delta_hosts);
7389 } else if (delta_hosts < 0) {
7390 do {
7391 sdebug_do_remove_host(false);
7392 } while (++delta_hosts);
7393 }
7394 return count;
7395}
7396static DRIVER_ATTR_RW(add_host);
7397
7398static ssize_t vpd_use_hostno_show(struct device_driver *ddp, char *buf)
7399{
7400 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_vpd_use_hostno);
7401}
7402static ssize_t vpd_use_hostno_store(struct device_driver *ddp, const char *buf,
7403 size_t count)
7404{
7405 int n;
7406
7407 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
7408 sdebug_vpd_use_hostno = n;
7409 return count;
7410 }
7411 return -EINVAL;
7412}
7413static DRIVER_ATTR_RW(vpd_use_hostno);
7414
7415static ssize_t statistics_show(struct device_driver *ddp, char *buf)
7416{
7417 return scnprintf(buf, PAGE_SIZE, "%d\n", (int)sdebug_statistics);
7418}
7419static ssize_t statistics_store(struct device_driver *ddp, const char *buf,
7420 size_t count)
7421{
7422 int n;
7423
7424 if ((count > 0) && (sscanf(buf, "%d", &n) == 1) && (n >= 0)) {
7425 if (n > 0)
7426 sdebug_statistics = true;
7427 else {
7428 clear_queue_stats();
7429 sdebug_statistics = false;
7430 }
7431 return count;
7432 }
7433 return -EINVAL;
7434}
7435static DRIVER_ATTR_RW(statistics);
7436
7437static ssize_t sector_size_show(struct device_driver *ddp, char *buf)
7438{
7439 return scnprintf(buf, PAGE_SIZE, "%u\n", sdebug_sector_size);
7440}
7441static DRIVER_ATTR_RO(sector_size);
7442
7443static ssize_t submit_queues_show(struct device_driver *ddp, char *buf)
7444{
7445 return scnprintf(buf, PAGE_SIZE, "%d\n", submit_queues);
7446}
7447static DRIVER_ATTR_RO(submit_queues);
7448
7449static ssize_t dix_show(struct device_driver *ddp, char *buf)
7450{
7451 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_dix);
7452}
7453static DRIVER_ATTR_RO(dix);
7454
7455static ssize_t dif_show(struct device_driver *ddp, char *buf)
7456{
7457 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_dif);
7458}
7459static DRIVER_ATTR_RO(dif);
7460
7461static ssize_t guard_show(struct device_driver *ddp, char *buf)
7462{
7463 return scnprintf(buf, PAGE_SIZE, "%u\n", sdebug_guard);
7464}
7465static DRIVER_ATTR_RO(guard);
7466
7467static ssize_t ato_show(struct device_driver *ddp, char *buf)
7468{
7469 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_ato);
7470}
7471static DRIVER_ATTR_RO(ato);
7472
7473static ssize_t map_show(struct device_driver *ddp, char *buf)
7474{
7475 ssize_t count = 0;
7476
7477 if (!scsi_debug_lbp())
7478 return scnprintf(buf, PAGE_SIZE, "0-%u\n",
7479 sdebug_store_sectors);
7480
7481 if (sdebug_fake_rw == 0 && !xa_empty(per_store_ap)) {
7482 struct sdeb_store_info *sip = xa_load(per_store_ap, 0);
7483
7484 if (sip)
7485 count = scnprintf(buf, PAGE_SIZE - 1, "%*pbl",
7486 (int)map_size, sip->map_storep);
7487 }
7488 buf[count++] = '\n';
7489 buf[count] = '\0';
7490
7491 return count;
7492}
7493static DRIVER_ATTR_RO(map);
7494
7495static ssize_t random_show(struct device_driver *ddp, char *buf)
7496{
7497 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_random);
7498}
7499
7500static ssize_t random_store(struct device_driver *ddp, const char *buf,
7501 size_t count)
7502{
7503 bool v;
7504
7505 if (kstrtobool(buf, &v))
7506 return -EINVAL;
7507
7508 sdebug_random = v;
7509 return count;
7510}
7511static DRIVER_ATTR_RW(random);
7512
7513static ssize_t removable_show(struct device_driver *ddp, char *buf)
7514{
7515 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_removable ? 1 : 0);
7516}
7517static ssize_t removable_store(struct device_driver *ddp, const char *buf,
7518 size_t count)
7519{
7520 int n;
7521
7522 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
7523 sdebug_removable = (n > 0);
7524 return count;
7525 }
7526 return -EINVAL;
7527}
7528static DRIVER_ATTR_RW(removable);
7529
7530static ssize_t host_lock_show(struct device_driver *ddp, char *buf)
7531{
7532 return scnprintf(buf, PAGE_SIZE, "%d\n", !!sdebug_host_lock);
7533}
7534/* N.B. sdebug_host_lock does nothing, kept for backward compatibility */
7535static ssize_t host_lock_store(struct device_driver *ddp, const char *buf,
7536 size_t count)
7537{
7538 int n;
7539
7540 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
7541 sdebug_host_lock = (n > 0);
7542 return count;
7543 }
7544 return -EINVAL;
7545}
7546static DRIVER_ATTR_RW(host_lock);
7547
7548static ssize_t strict_show(struct device_driver *ddp, char *buf)
7549{
7550 return scnprintf(buf, PAGE_SIZE, "%d\n", !!sdebug_strict);
7551}
7552static ssize_t strict_store(struct device_driver *ddp, const char *buf,
7553 size_t count)
7554{
7555 int n;
7556
7557 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
7558 sdebug_strict = (n > 0);
7559 return count;
7560 }
7561 return -EINVAL;
7562}
7563static DRIVER_ATTR_RW(strict);
7564
7565static ssize_t uuid_ctl_show(struct device_driver *ddp, char *buf)
7566{
7567 return scnprintf(buf, PAGE_SIZE, "%d\n", !!sdebug_uuid_ctl);
7568}
7569static DRIVER_ATTR_RO(uuid_ctl);
7570
7571static ssize_t cdb_len_show(struct device_driver *ddp, char *buf)
7572{
7573 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_cdb_len);
7574}
7575static ssize_t cdb_len_store(struct device_driver *ddp, const char *buf,
7576 size_t count)
7577{
7578 int ret, n;
7579
7580 ret = kstrtoint(buf, 0, &n);
7581 if (ret)
7582 return ret;
7583 sdebug_cdb_len = n;
7584 all_config_cdb_len();
7585 return count;
7586}
7587static DRIVER_ATTR_RW(cdb_len);
7588
7589static const char * const zbc_model_strs_a[] = {
7590 [BLK_ZONED_NONE] = "none",
7591 [BLK_ZONED_HA] = "host-aware",
7592 [BLK_ZONED_HM] = "host-managed",
7593};
7594
7595static const char * const zbc_model_strs_b[] = {
7596 [BLK_ZONED_NONE] = "no",
7597 [BLK_ZONED_HA] = "aware",
7598 [BLK_ZONED_HM] = "managed",
7599};
7600
7601static const char * const zbc_model_strs_c[] = {
7602 [BLK_ZONED_NONE] = "0",
7603 [BLK_ZONED_HA] = "1",
7604 [BLK_ZONED_HM] = "2",
7605};
7606
7607static int sdeb_zbc_model_str(const char *cp)
7608{
7609 int res = sysfs_match_string(zbc_model_strs_a, cp);
7610
7611 if (res < 0) {
7612 res = sysfs_match_string(zbc_model_strs_b, cp);
7613 if (res < 0) {
7614 res = sysfs_match_string(zbc_model_strs_c, cp);
7615 if (res < 0)
7616 return -EINVAL;
7617 }
7618 }
7619 return res;
7620}
7621
7622static ssize_t zbc_show(struct device_driver *ddp, char *buf)
7623{
7624 return scnprintf(buf, PAGE_SIZE, "%s\n",
7625 zbc_model_strs_a[sdeb_zbc_model]);
7626}
7627static DRIVER_ATTR_RO(zbc);
7628
7629static ssize_t tur_ms_to_ready_show(struct device_driver *ddp, char *buf)
7630{
7631 return scnprintf(buf, PAGE_SIZE, "%d\n", sdeb_tur_ms_to_ready);
7632}
7633static DRIVER_ATTR_RO(tur_ms_to_ready);
7634
7635static ssize_t group_number_stats_show(struct device_driver *ddp, char *buf)
7636{
7637 char *p = buf, *end = buf + PAGE_SIZE;
7638 int i;
7639
7640 for (i = 0; i < ARRAY_SIZE(writes_by_group_number); i++)
7641 p += scnprintf(p, end - p, "%d %ld\n", i,
7642 atomic_long_read(&writes_by_group_number[i]));
7643
7644 return p - buf;
7645}
7646
7647static ssize_t group_number_stats_store(struct device_driver *ddp,
7648 const char *buf, size_t count)
7649{
7650 int i;
7651
7652 for (i = 0; i < ARRAY_SIZE(writes_by_group_number); i++)
7653 atomic_long_set(&writes_by_group_number[i], 0);
7654
7655 return count;
7656}
7657static DRIVER_ATTR_RW(group_number_stats);
7658
7659/* Note: The following array creates attribute files in the
7660 /sys/bus/pseudo/drivers/scsi_debug directory. The advantage of these
7661 files (over those found in the /sys/module/scsi_debug/parameters
7662 directory) is that auxiliary actions can be triggered when an attribute
7663 is changed. For example see: add_host_store() above.
7664 */
7665
7666static struct attribute *sdebug_drv_attrs[] = {
7667 &driver_attr_delay.attr,
7668 &driver_attr_opts.attr,
7669 &driver_attr_ptype.attr,
7670 &driver_attr_dsense.attr,
7671 &driver_attr_fake_rw.attr,
7672 &driver_attr_host_max_queue.attr,
7673 &driver_attr_no_lun_0.attr,
7674 &driver_attr_num_tgts.attr,
7675 &driver_attr_dev_size_mb.attr,
7676 &driver_attr_num_parts.attr,
7677 &driver_attr_every_nth.attr,
7678 &driver_attr_lun_format.attr,
7679 &driver_attr_max_luns.attr,
7680 &driver_attr_max_queue.attr,
7681 &driver_attr_no_rwlock.attr,
7682 &driver_attr_no_uld.attr,
7683 &driver_attr_scsi_level.attr,
7684 &driver_attr_virtual_gb.attr,
7685 &driver_attr_add_host.attr,
7686 &driver_attr_per_host_store.attr,
7687 &driver_attr_vpd_use_hostno.attr,
7688 &driver_attr_sector_size.attr,
7689 &driver_attr_statistics.attr,
7690 &driver_attr_submit_queues.attr,
7691 &driver_attr_dix.attr,
7692 &driver_attr_dif.attr,
7693 &driver_attr_guard.attr,
7694 &driver_attr_ato.attr,
7695 &driver_attr_map.attr,
7696 &driver_attr_random.attr,
7697 &driver_attr_removable.attr,
7698 &driver_attr_host_lock.attr,
7699 &driver_attr_ndelay.attr,
7700 &driver_attr_strict.attr,
7701 &driver_attr_uuid_ctl.attr,
7702 &driver_attr_cdb_len.attr,
7703 &driver_attr_tur_ms_to_ready.attr,
7704 &driver_attr_zbc.attr,
7705 &driver_attr_group_number_stats.attr,
7706 NULL,
7707};
7708ATTRIBUTE_GROUPS(sdebug_drv);
7709
7710static struct device *pseudo_primary;
7711
7712static int __init scsi_debug_init(void)
7713{
7714 bool want_store = (sdebug_fake_rw == 0);
7715 unsigned long sz;
7716 int k, ret, hosts_to_add;
7717 int idx = -1;
7718
7719 if (sdebug_ndelay >= 1000 * 1000 * 1000) {
7720 pr_warn("ndelay must be less than 1 second, ignored\n");
7721 sdebug_ndelay = 0;
7722 } else if (sdebug_ndelay > 0)
7723 sdebug_jdelay = JDELAY_OVERRIDDEN;
7724
7725 switch (sdebug_sector_size) {
7726 case 512:
7727 case 1024:
7728 case 2048:
7729 case 4096:
7730 break;
7731 default:
7732 pr_err("invalid sector_size %d\n", sdebug_sector_size);
7733 return -EINVAL;
7734 }
7735
7736 switch (sdebug_dif) {
7737 case T10_PI_TYPE0_PROTECTION:
7738 break;
7739 case T10_PI_TYPE1_PROTECTION:
7740 case T10_PI_TYPE2_PROTECTION:
7741 case T10_PI_TYPE3_PROTECTION:
7742 have_dif_prot = true;
7743 break;
7744
7745 default:
7746 pr_err("dif must be 0, 1, 2 or 3\n");
7747 return -EINVAL;
7748 }
7749
7750 if (sdebug_num_tgts < 0) {
7751 pr_err("num_tgts must be >= 0\n");
7752 return -EINVAL;
7753 }
7754
7755 if (sdebug_guard > 1) {
7756 pr_err("guard must be 0 or 1\n");
7757 return -EINVAL;
7758 }
7759
7760 if (sdebug_ato > 1) {
7761 pr_err("ato must be 0 or 1\n");
7762 return -EINVAL;
7763 }
7764
7765 if (sdebug_physblk_exp > 15) {
7766 pr_err("invalid physblk_exp %u\n", sdebug_physblk_exp);
7767 return -EINVAL;
7768 }
7769
7770 sdebug_lun_am = sdebug_lun_am_i;
7771 if (sdebug_lun_am > SAM_LUN_AM_FLAT) {
7772 pr_warn("Invalid LUN format %u, using default\n", (int)sdebug_lun_am);
7773 sdebug_lun_am = SAM_LUN_AM_PERIPHERAL;
7774 }
7775
7776 if (sdebug_max_luns > 256) {
7777 if (sdebug_max_luns > 16384) {
7778 pr_warn("max_luns can be no more than 16384, use default\n");
7779 sdebug_max_luns = DEF_MAX_LUNS;
7780 }
7781 sdebug_lun_am = SAM_LUN_AM_FLAT;
7782 }
7783
7784 if (sdebug_lowest_aligned > 0x3fff) {
7785 pr_err("lowest_aligned too big: %u\n", sdebug_lowest_aligned);
7786 return -EINVAL;
7787 }
7788
7789 if (submit_queues < 1) {
7790 pr_err("submit_queues must be 1 or more\n");
7791 return -EINVAL;
7792 }
7793
7794 if ((sdebug_max_queue > SDEBUG_CANQUEUE) || (sdebug_max_queue < 1)) {
7795 pr_err("max_queue must be in range [1, %d]\n", SDEBUG_CANQUEUE);
7796 return -EINVAL;
7797 }
7798
7799 if ((sdebug_host_max_queue > SDEBUG_CANQUEUE) ||
7800 (sdebug_host_max_queue < 0)) {
7801 pr_err("host_max_queue must be in range [0 %d]\n",
7802 SDEBUG_CANQUEUE);
7803 return -EINVAL;
7804 }
7805
7806 if (sdebug_host_max_queue &&
7807 (sdebug_max_queue != sdebug_host_max_queue)) {
7808 sdebug_max_queue = sdebug_host_max_queue;
7809 pr_warn("fixing max submit queue depth to host max queue depth, %d\n",
7810 sdebug_max_queue);
7811 }
7812
7813 /*
7814 * check for host managed zoned block device specified with
7815 * ptype=0x14 or zbc=XXX.
7816 */
7817 if (sdebug_ptype == TYPE_ZBC) {
7818 sdeb_zbc_model = BLK_ZONED_HM;
7819 } else if (sdeb_zbc_model_s && *sdeb_zbc_model_s) {
7820 k = sdeb_zbc_model_str(sdeb_zbc_model_s);
7821 if (k < 0)
7822 return k;
7823 sdeb_zbc_model = k;
7824 switch (sdeb_zbc_model) {
7825 case BLK_ZONED_NONE:
7826 case BLK_ZONED_HA:
7827 sdebug_ptype = TYPE_DISK;
7828 break;
7829 case BLK_ZONED_HM:
7830 sdebug_ptype = TYPE_ZBC;
7831 break;
7832 default:
7833 pr_err("Invalid ZBC model\n");
7834 return -EINVAL;
7835 }
7836 }
7837 if (sdeb_zbc_model != BLK_ZONED_NONE) {
7838 sdeb_zbc_in_use = true;
7839 if (sdebug_dev_size_mb == DEF_DEV_SIZE_PRE_INIT)
7840 sdebug_dev_size_mb = DEF_ZBC_DEV_SIZE_MB;
7841 }
7842
7843 if (sdebug_dev_size_mb == DEF_DEV_SIZE_PRE_INIT)
7844 sdebug_dev_size_mb = DEF_DEV_SIZE_MB;
7845 if (sdebug_dev_size_mb < 1)
7846 sdebug_dev_size_mb = 1; /* force minimum 1 MB ramdisk */
7847 sz = (unsigned long)sdebug_dev_size_mb * 1048576;
7848 sdebug_store_sectors = sz / sdebug_sector_size;
7849 sdebug_capacity = get_sdebug_capacity();
7850
7851 /* play around with geometry, don't waste too much on track 0 */
7852 sdebug_heads = 8;
7853 sdebug_sectors_per = 32;
7854 if (sdebug_dev_size_mb >= 256)
7855 sdebug_heads = 64;
7856 else if (sdebug_dev_size_mb >= 16)
7857 sdebug_heads = 32;
7858 sdebug_cylinders_per = (unsigned long)sdebug_capacity /
7859 (sdebug_sectors_per * sdebug_heads);
7860 if (sdebug_cylinders_per >= 1024) {
7861 /* other LLDs do this; implies >= 1GB ram disk ... */
7862 sdebug_heads = 255;
7863 sdebug_sectors_per = 63;
7864 sdebug_cylinders_per = (unsigned long)sdebug_capacity /
7865 (sdebug_sectors_per * sdebug_heads);
7866 }
7867 if (scsi_debug_lbp()) {
7868 sdebug_unmap_max_blocks =
7869 clamp(sdebug_unmap_max_blocks, 0U, 0xffffffffU);
7870
7871 sdebug_unmap_max_desc =
7872 clamp(sdebug_unmap_max_desc, 0U, 256U);
7873
7874 sdebug_unmap_granularity =
7875 clamp(sdebug_unmap_granularity, 1U, 0xffffffffU);
7876
7877 if (sdebug_unmap_alignment &&
7878 sdebug_unmap_granularity <=
7879 sdebug_unmap_alignment) {
7880 pr_err("ERR: unmap_granularity <= unmap_alignment\n");
7881 return -EINVAL;
7882 }
7883 }
7884
7885 xa_init_flags(per_store_ap, XA_FLAGS_ALLOC | XA_FLAGS_LOCK_IRQ);
7886 if (want_store) {
7887 idx = sdebug_add_store();
7888 if (idx < 0)
7889 return idx;
7890 }
7891
7892 pseudo_primary = root_device_register("pseudo_0");
7893 if (IS_ERR(pseudo_primary)) {
7894 pr_warn("root_device_register() error\n");
7895 ret = PTR_ERR(pseudo_primary);
7896 goto free_vm;
7897 }
7898 ret = bus_register(&pseudo_lld_bus);
7899 if (ret < 0) {
7900 pr_warn("bus_register error: %d\n", ret);
7901 goto dev_unreg;
7902 }
7903 ret = driver_register(&sdebug_driverfs_driver);
7904 if (ret < 0) {
7905 pr_warn("driver_register error: %d\n", ret);
7906 goto bus_unreg;
7907 }
7908
7909 hosts_to_add = sdebug_add_host;
7910 sdebug_add_host = 0;
7911
7912 queued_cmd_cache = KMEM_CACHE(sdebug_queued_cmd, SLAB_HWCACHE_ALIGN);
7913 if (!queued_cmd_cache) {
7914 ret = -ENOMEM;
7915 goto driver_unreg;
7916 }
7917
7918 sdebug_debugfs_root = debugfs_create_dir("scsi_debug", NULL);
7919 if (IS_ERR_OR_NULL(sdebug_debugfs_root))
7920 pr_info("%s: failed to create initial debugfs directory\n", __func__);
7921
7922 for (k = 0; k < hosts_to_add; k++) {
7923 if (want_store && k == 0) {
7924 ret = sdebug_add_host_helper(idx);
7925 if (ret < 0) {
7926 pr_err("add_host_helper k=%d, error=%d\n",
7927 k, -ret);
7928 break;
7929 }
7930 } else {
7931 ret = sdebug_do_add_host(want_store &&
7932 sdebug_per_host_store);
7933 if (ret < 0) {
7934 pr_err("add_host k=%d error=%d\n", k, -ret);
7935 break;
7936 }
7937 }
7938 }
7939 if (sdebug_verbose)
7940 pr_info("built %d host(s)\n", sdebug_num_hosts);
7941
7942 return 0;
7943
7944driver_unreg:
7945 driver_unregister(&sdebug_driverfs_driver);
7946bus_unreg:
7947 bus_unregister(&pseudo_lld_bus);
7948dev_unreg:
7949 root_device_unregister(pseudo_primary);
7950free_vm:
7951 sdebug_erase_store(idx, NULL);
7952 return ret;
7953}
7954
7955static void __exit scsi_debug_exit(void)
7956{
7957 int k = sdebug_num_hosts;
7958
7959 for (; k; k--)
7960 sdebug_do_remove_host(true);
7961 kmem_cache_destroy(queued_cmd_cache);
7962 driver_unregister(&sdebug_driverfs_driver);
7963 bus_unregister(&pseudo_lld_bus);
7964 root_device_unregister(pseudo_primary);
7965
7966 sdebug_erase_all_stores(false);
7967 xa_destroy(per_store_ap);
7968 debugfs_remove(sdebug_debugfs_root);
7969}
7970
7971device_initcall(scsi_debug_init);
7972module_exit(scsi_debug_exit);
7973
7974static void sdebug_release_adapter(struct device *dev)
7975{
7976 struct sdebug_host_info *sdbg_host;
7977
7978 sdbg_host = dev_to_sdebug_host(dev);
7979 kfree(sdbg_host);
7980}
7981
7982/* idx must be valid, if sip is NULL then it will be obtained using idx */
7983static void sdebug_erase_store(int idx, struct sdeb_store_info *sip)
7984{
7985 if (idx < 0)
7986 return;
7987 if (!sip) {
7988 if (xa_empty(per_store_ap))
7989 return;
7990 sip = xa_load(per_store_ap, idx);
7991 if (!sip)
7992 return;
7993 }
7994 vfree(sip->map_storep);
7995 vfree(sip->dif_storep);
7996 vfree(sip->storep);
7997 xa_erase(per_store_ap, idx);
7998 kfree(sip);
7999}
8000
8001/* Assume apart_from_first==false only in shutdown case. */
8002static void sdebug_erase_all_stores(bool apart_from_first)
8003{
8004 unsigned long idx;
8005 struct sdeb_store_info *sip = NULL;
8006
8007 xa_for_each(per_store_ap, idx, sip) {
8008 if (apart_from_first)
8009 apart_from_first = false;
8010 else
8011 sdebug_erase_store(idx, sip);
8012 }
8013 if (apart_from_first)
8014 sdeb_most_recent_idx = sdeb_first_idx;
8015}
8016
8017/*
8018 * Returns store xarray new element index (idx) if >=0 else negated errno.
8019 * Limit the number of stores to 65536.
8020 */
8021static int sdebug_add_store(void)
8022{
8023 int res;
8024 u32 n_idx;
8025 unsigned long iflags;
8026 unsigned long sz = (unsigned long)sdebug_dev_size_mb * 1048576;
8027 struct sdeb_store_info *sip = NULL;
8028 struct xa_limit xal = { .max = 1 << 16, .min = 0 };
8029
8030 sip = kzalloc(sizeof(*sip), GFP_KERNEL);
8031 if (!sip)
8032 return -ENOMEM;
8033
8034 xa_lock_irqsave(per_store_ap, iflags);
8035 res = __xa_alloc(per_store_ap, &n_idx, sip, xal, GFP_ATOMIC);
8036 if (unlikely(res < 0)) {
8037 xa_unlock_irqrestore(per_store_ap, iflags);
8038 kfree(sip);
8039 pr_warn("%s: xa_alloc() errno=%d\n", __func__, -res);
8040 return res;
8041 }
8042 sdeb_most_recent_idx = n_idx;
8043 if (sdeb_first_idx < 0)
8044 sdeb_first_idx = n_idx;
8045 xa_unlock_irqrestore(per_store_ap, iflags);
8046
8047 res = -ENOMEM;
8048 sip->storep = vzalloc(sz);
8049 if (!sip->storep) {
8050 pr_err("user data oom\n");
8051 goto err;
8052 }
8053 if (sdebug_num_parts > 0)
8054 sdebug_build_parts(sip->storep, sz);
8055
8056 /* DIF/DIX: what T10 calls Protection Information (PI) */
8057 if (sdebug_dix) {
8058 int dif_size;
8059
8060 dif_size = sdebug_store_sectors * sizeof(struct t10_pi_tuple);
8061 sip->dif_storep = vmalloc(dif_size);
8062
8063 pr_info("dif_storep %u bytes @ %pK\n", dif_size,
8064 sip->dif_storep);
8065
8066 if (!sip->dif_storep) {
8067 pr_err("DIX oom\n");
8068 goto err;
8069 }
8070 memset(sip->dif_storep, 0xff, dif_size);
8071 }
8072 /* Logical Block Provisioning */
8073 if (scsi_debug_lbp()) {
8074 map_size = lba_to_map_index(sdebug_store_sectors - 1) + 1;
8075 sip->map_storep = vmalloc(array_size(sizeof(long),
8076 BITS_TO_LONGS(map_size)));
8077
8078 pr_info("%lu provisioning blocks\n", map_size);
8079
8080 if (!sip->map_storep) {
8081 pr_err("LBP map oom\n");
8082 goto err;
8083 }
8084
8085 bitmap_zero(sip->map_storep, map_size);
8086
8087 /* Map first 1KB for partition table */
8088 if (sdebug_num_parts)
8089 map_region(sip, 0, 2);
8090 }
8091
8092 rwlock_init(&sip->macc_data_lck);
8093 rwlock_init(&sip->macc_meta_lck);
8094 rwlock_init(&sip->macc_sector_lck);
8095 return (int)n_idx;
8096err:
8097 sdebug_erase_store((int)n_idx, sip);
8098 pr_warn("%s: failed, errno=%d\n", __func__, -res);
8099 return res;
8100}
8101
8102static int sdebug_add_host_helper(int per_host_idx)
8103{
8104 int k, devs_per_host, idx;
8105 int error = -ENOMEM;
8106 struct sdebug_host_info *sdbg_host;
8107 struct sdebug_dev_info *sdbg_devinfo, *tmp;
8108
8109 sdbg_host = kzalloc(sizeof(*sdbg_host), GFP_KERNEL);
8110 if (!sdbg_host)
8111 return -ENOMEM;
8112 idx = (per_host_idx < 0) ? sdeb_first_idx : per_host_idx;
8113 if (xa_get_mark(per_store_ap, idx, SDEB_XA_NOT_IN_USE))
8114 xa_clear_mark(per_store_ap, idx, SDEB_XA_NOT_IN_USE);
8115 sdbg_host->si_idx = idx;
8116
8117 INIT_LIST_HEAD(&sdbg_host->dev_info_list);
8118
8119 devs_per_host = sdebug_num_tgts * sdebug_max_luns;
8120 for (k = 0; k < devs_per_host; k++) {
8121 sdbg_devinfo = sdebug_device_create(sdbg_host, GFP_KERNEL);
8122 if (!sdbg_devinfo)
8123 goto clean;
8124 }
8125
8126 mutex_lock(&sdebug_host_list_mutex);
8127 list_add_tail(&sdbg_host->host_list, &sdebug_host_list);
8128 mutex_unlock(&sdebug_host_list_mutex);
8129
8130 sdbg_host->dev.bus = &pseudo_lld_bus;
8131 sdbg_host->dev.parent = pseudo_primary;
8132 sdbg_host->dev.release = &sdebug_release_adapter;
8133 dev_set_name(&sdbg_host->dev, "adapter%d", sdebug_num_hosts);
8134
8135 error = device_register(&sdbg_host->dev);
8136 if (error) {
8137 mutex_lock(&sdebug_host_list_mutex);
8138 list_del(&sdbg_host->host_list);
8139 mutex_unlock(&sdebug_host_list_mutex);
8140 goto clean;
8141 }
8142
8143 ++sdebug_num_hosts;
8144 return 0;
8145
8146clean:
8147 list_for_each_entry_safe(sdbg_devinfo, tmp, &sdbg_host->dev_info_list,
8148 dev_list) {
8149 list_del(&sdbg_devinfo->dev_list);
8150 kfree(sdbg_devinfo->zstate);
8151 kfree(sdbg_devinfo);
8152 }
8153 if (sdbg_host->dev.release)
8154 put_device(&sdbg_host->dev);
8155 else
8156 kfree(sdbg_host);
8157 pr_warn("%s: failed, errno=%d\n", __func__, -error);
8158 return error;
8159}
8160
8161static int sdebug_do_add_host(bool mk_new_store)
8162{
8163 int ph_idx = sdeb_most_recent_idx;
8164
8165 if (mk_new_store) {
8166 ph_idx = sdebug_add_store();
8167 if (ph_idx < 0)
8168 return ph_idx;
8169 }
8170 return sdebug_add_host_helper(ph_idx);
8171}
8172
8173static void sdebug_do_remove_host(bool the_end)
8174{
8175 int idx = -1;
8176 struct sdebug_host_info *sdbg_host = NULL;
8177 struct sdebug_host_info *sdbg_host2;
8178
8179 mutex_lock(&sdebug_host_list_mutex);
8180 if (!list_empty(&sdebug_host_list)) {
8181 sdbg_host = list_entry(sdebug_host_list.prev,
8182 struct sdebug_host_info, host_list);
8183 idx = sdbg_host->si_idx;
8184 }
8185 if (!the_end && idx >= 0) {
8186 bool unique = true;
8187
8188 list_for_each_entry(sdbg_host2, &sdebug_host_list, host_list) {
8189 if (sdbg_host2 == sdbg_host)
8190 continue;
8191 if (idx == sdbg_host2->si_idx) {
8192 unique = false;
8193 break;
8194 }
8195 }
8196 if (unique) {
8197 xa_set_mark(per_store_ap, idx, SDEB_XA_NOT_IN_USE);
8198 if (idx == sdeb_most_recent_idx)
8199 --sdeb_most_recent_idx;
8200 }
8201 }
8202 if (sdbg_host)
8203 list_del(&sdbg_host->host_list);
8204 mutex_unlock(&sdebug_host_list_mutex);
8205
8206 if (!sdbg_host)
8207 return;
8208
8209 device_unregister(&sdbg_host->dev);
8210 --sdebug_num_hosts;
8211}
8212
8213static int sdebug_change_qdepth(struct scsi_device *sdev, int qdepth)
8214{
8215 struct sdebug_dev_info *devip = sdev->hostdata;
8216
8217 if (!devip)
8218 return -ENODEV;
8219
8220 mutex_lock(&sdebug_host_list_mutex);
8221 block_unblock_all_queues(true);
8222
8223 if (qdepth > SDEBUG_CANQUEUE) {
8224 qdepth = SDEBUG_CANQUEUE;
8225 pr_warn("%s: requested qdepth [%d] exceeds canqueue [%d], trim\n", __func__,
8226 qdepth, SDEBUG_CANQUEUE);
8227 }
8228 if (qdepth < 1)
8229 qdepth = 1;
8230 if (qdepth != sdev->queue_depth)
8231 scsi_change_queue_depth(sdev, qdepth);
8232
8233 block_unblock_all_queues(false);
8234 mutex_unlock(&sdebug_host_list_mutex);
8235
8236 if (SDEBUG_OPT_Q_NOISE & sdebug_opts)
8237 sdev_printk(KERN_INFO, sdev, "%s: qdepth=%d\n", __func__, qdepth);
8238
8239 return sdev->queue_depth;
8240}
8241
8242static bool fake_timeout(struct scsi_cmnd *scp)
8243{
8244 if (0 == (atomic_read(&sdebug_cmnd_count) % abs(sdebug_every_nth))) {
8245 if (sdebug_every_nth < -1)
8246 sdebug_every_nth = -1;
8247 if (SDEBUG_OPT_TIMEOUT & sdebug_opts)
8248 return true; /* ignore command causing timeout */
8249 else if (SDEBUG_OPT_MAC_TIMEOUT & sdebug_opts &&
8250 scsi_medium_access_command(scp))
8251 return true; /* time out reads and writes */
8252 }
8253 return false;
8254}
8255
8256/* Response to TUR or media access command when device stopped */
8257static int resp_not_ready(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
8258{
8259 int stopped_state;
8260 u64 diff_ns = 0;
8261 ktime_t now_ts = ktime_get_boottime();
8262 struct scsi_device *sdp = scp->device;
8263
8264 stopped_state = atomic_read(&devip->stopped);
8265 if (stopped_state == 2) {
8266 if (ktime_to_ns(now_ts) > ktime_to_ns(devip->create_ts)) {
8267 diff_ns = ktime_to_ns(ktime_sub(now_ts, devip->create_ts));
8268 if (diff_ns >= ((u64)sdeb_tur_ms_to_ready * 1000000)) {
8269 /* tur_ms_to_ready timer extinguished */
8270 atomic_set(&devip->stopped, 0);
8271 return 0;
8272 }
8273 }
8274 mk_sense_buffer(scp, NOT_READY, LOGICAL_UNIT_NOT_READY, 0x1);
8275 if (sdebug_verbose)
8276 sdev_printk(KERN_INFO, sdp,
8277 "%s: Not ready: in process of becoming ready\n", my_name);
8278 if (scp->cmnd[0] == TEST_UNIT_READY) {
8279 u64 tur_nanosecs_to_ready = (u64)sdeb_tur_ms_to_ready * 1000000;
8280
8281 if (diff_ns <= tur_nanosecs_to_ready)
8282 diff_ns = tur_nanosecs_to_ready - diff_ns;
8283 else
8284 diff_ns = tur_nanosecs_to_ready;
8285 /* As per 20-061r2 approved for spc6 by T10 on 20200716 */
8286 do_div(diff_ns, 1000000); /* diff_ns becomes milliseconds */
8287 scsi_set_sense_information(scp->sense_buffer, SCSI_SENSE_BUFFERSIZE,
8288 diff_ns);
8289 return check_condition_result;
8290 }
8291 }
8292 mk_sense_buffer(scp, NOT_READY, LOGICAL_UNIT_NOT_READY, 0x2);
8293 if (sdebug_verbose)
8294 sdev_printk(KERN_INFO, sdp, "%s: Not ready: initializing command required\n",
8295 my_name);
8296 return check_condition_result;
8297}
8298
8299static void sdebug_map_queues(struct Scsi_Host *shost)
8300{
8301 int i, qoff;
8302
8303 if (shost->nr_hw_queues == 1)
8304 return;
8305
8306 for (i = 0, qoff = 0; i < HCTX_MAX_TYPES; i++) {
8307 struct blk_mq_queue_map *map = &shost->tag_set.map[i];
8308
8309 map->nr_queues = 0;
8310
8311 if (i == HCTX_TYPE_DEFAULT)
8312 map->nr_queues = submit_queues - poll_queues;
8313 else if (i == HCTX_TYPE_POLL)
8314 map->nr_queues = poll_queues;
8315
8316 if (!map->nr_queues) {
8317 BUG_ON(i == HCTX_TYPE_DEFAULT);
8318 continue;
8319 }
8320
8321 map->queue_offset = qoff;
8322 blk_mq_map_queues(map);
8323
8324 qoff += map->nr_queues;
8325 }
8326}
8327
8328struct sdebug_blk_mq_poll_data {
8329 unsigned int queue_num;
8330 int *num_entries;
8331};
8332
8333/*
8334 * We don't handle aborted commands here, but it does not seem possible to have
8335 * aborted polled commands from schedule_resp()
8336 */
8337static bool sdebug_blk_mq_poll_iter(struct request *rq, void *opaque)
8338{
8339 struct sdebug_blk_mq_poll_data *data = opaque;
8340 struct scsi_cmnd *cmd = blk_mq_rq_to_pdu(rq);
8341 struct sdebug_scsi_cmd *sdsc = scsi_cmd_priv(cmd);
8342 struct sdebug_defer *sd_dp;
8343 u32 unique_tag = blk_mq_unique_tag(rq);
8344 u16 hwq = blk_mq_unique_tag_to_hwq(unique_tag);
8345 struct sdebug_queued_cmd *sqcp;
8346 unsigned long flags;
8347 int queue_num = data->queue_num;
8348 ktime_t time;
8349
8350 /* We're only interested in one queue for this iteration */
8351 if (hwq != queue_num)
8352 return true;
8353
8354 /* Subsequent checks would fail if this failed, but check anyway */
8355 if (!test_bit(SCMD_STATE_INFLIGHT, &cmd->state))
8356 return true;
8357
8358 time = ktime_get_boottime();
8359
8360 spin_lock_irqsave(&sdsc->lock, flags);
8361 sqcp = TO_QUEUED_CMD(cmd);
8362 if (!sqcp) {
8363 spin_unlock_irqrestore(&sdsc->lock, flags);
8364 return true;
8365 }
8366
8367 sd_dp = &sqcp->sd_dp;
8368 if (READ_ONCE(sd_dp->defer_t) != SDEB_DEFER_POLL) {
8369 spin_unlock_irqrestore(&sdsc->lock, flags);
8370 return true;
8371 }
8372
8373 if (time < sd_dp->cmpl_ts) {
8374 spin_unlock_irqrestore(&sdsc->lock, flags);
8375 return true;
8376 }
8377
8378 ASSIGN_QUEUED_CMD(cmd, NULL);
8379 spin_unlock_irqrestore(&sdsc->lock, flags);
8380
8381 if (sdebug_statistics) {
8382 atomic_inc(&sdebug_completions);
8383 if (raw_smp_processor_id() != sd_dp->issuing_cpu)
8384 atomic_inc(&sdebug_miss_cpus);
8385 }
8386
8387 sdebug_free_queued_cmd(sqcp);
8388
8389 scsi_done(cmd); /* callback to mid level */
8390 (*data->num_entries)++;
8391 return true;
8392}
8393
8394static int sdebug_blk_mq_poll(struct Scsi_Host *shost, unsigned int queue_num)
8395{
8396 int num_entries = 0;
8397 struct sdebug_blk_mq_poll_data data = {
8398 .queue_num = queue_num,
8399 .num_entries = &num_entries,
8400 };
8401
8402 blk_mq_tagset_busy_iter(&shost->tag_set, sdebug_blk_mq_poll_iter,
8403 &data);
8404
8405 if (num_entries > 0)
8406 atomic_add(num_entries, &sdeb_mq_poll_count);
8407 return num_entries;
8408}
8409
8410static int sdebug_timeout_cmd(struct scsi_cmnd *cmnd)
8411{
8412 struct scsi_device *sdp = cmnd->device;
8413 struct sdebug_dev_info *devip = (struct sdebug_dev_info *)sdp->hostdata;
8414 struct sdebug_err_inject *err;
8415 unsigned char *cmd = cmnd->cmnd;
8416 int ret = 0;
8417
8418 if (devip == NULL)
8419 return 0;
8420
8421 rcu_read_lock();
8422 list_for_each_entry_rcu(err, &devip->inject_err_list, list) {
8423 if (err->type == ERR_TMOUT_CMD &&
8424 (err->cmd == cmd[0] || err->cmd == 0xff)) {
8425 ret = !!err->cnt;
8426 if (err->cnt < 0)
8427 err->cnt++;
8428
8429 rcu_read_unlock();
8430 return ret;
8431 }
8432 }
8433 rcu_read_unlock();
8434
8435 return 0;
8436}
8437
8438static int sdebug_fail_queue_cmd(struct scsi_cmnd *cmnd)
8439{
8440 struct scsi_device *sdp = cmnd->device;
8441 struct sdebug_dev_info *devip = (struct sdebug_dev_info *)sdp->hostdata;
8442 struct sdebug_err_inject *err;
8443 unsigned char *cmd = cmnd->cmnd;
8444 int ret = 0;
8445
8446 if (devip == NULL)
8447 return 0;
8448
8449 rcu_read_lock();
8450 list_for_each_entry_rcu(err, &devip->inject_err_list, list) {
8451 if (err->type == ERR_FAIL_QUEUE_CMD &&
8452 (err->cmd == cmd[0] || err->cmd == 0xff)) {
8453 ret = err->cnt ? err->queuecmd_ret : 0;
8454 if (err->cnt < 0)
8455 err->cnt++;
8456
8457 rcu_read_unlock();
8458 return ret;
8459 }
8460 }
8461 rcu_read_unlock();
8462
8463 return 0;
8464}
8465
8466static int sdebug_fail_cmd(struct scsi_cmnd *cmnd, int *retval,
8467 struct sdebug_err_inject *info)
8468{
8469 struct scsi_device *sdp = cmnd->device;
8470 struct sdebug_dev_info *devip = (struct sdebug_dev_info *)sdp->hostdata;
8471 struct sdebug_err_inject *err;
8472 unsigned char *cmd = cmnd->cmnd;
8473 int ret = 0;
8474 int result;
8475
8476 if (devip == NULL)
8477 return 0;
8478
8479 rcu_read_lock();
8480 list_for_each_entry_rcu(err, &devip->inject_err_list, list) {
8481 if (err->type == ERR_FAIL_CMD &&
8482 (err->cmd == cmd[0] || err->cmd == 0xff)) {
8483 if (!err->cnt) {
8484 rcu_read_unlock();
8485 return 0;
8486 }
8487
8488 ret = !!err->cnt;
8489 rcu_read_unlock();
8490 goto out_handle;
8491 }
8492 }
8493 rcu_read_unlock();
8494
8495 return 0;
8496
8497out_handle:
8498 if (err->cnt < 0)
8499 err->cnt++;
8500 mk_sense_buffer(cmnd, err->sense_key, err->asc, err->asq);
8501 result = err->status_byte | err->host_byte << 16 | err->driver_byte << 24;
8502 *info = *err;
8503 *retval = schedule_resp(cmnd, devip, result, NULL, 0, 0);
8504
8505 return ret;
8506}
8507
8508static int scsi_debug_queuecommand(struct Scsi_Host *shost,
8509 struct scsi_cmnd *scp)
8510{
8511 u8 sdeb_i;
8512 struct scsi_device *sdp = scp->device;
8513 const struct opcode_info_t *oip;
8514 const struct opcode_info_t *r_oip;
8515 struct sdebug_dev_info *devip;
8516 u8 *cmd = scp->cmnd;
8517 int (*r_pfp)(struct scsi_cmnd *, struct sdebug_dev_info *);
8518 int (*pfp)(struct scsi_cmnd *, struct sdebug_dev_info *) = NULL;
8519 int k, na;
8520 int errsts = 0;
8521 u64 lun_index = sdp->lun & 0x3FFF;
8522 u32 flags;
8523 u16 sa;
8524 u8 opcode = cmd[0];
8525 bool has_wlun_rl;
8526 bool inject_now;
8527 int ret = 0;
8528 struct sdebug_err_inject err;
8529
8530 scsi_set_resid(scp, 0);
8531 if (sdebug_statistics) {
8532 atomic_inc(&sdebug_cmnd_count);
8533 inject_now = inject_on_this_cmd();
8534 } else {
8535 inject_now = false;
8536 }
8537 if (unlikely(sdebug_verbose &&
8538 !(SDEBUG_OPT_NO_CDB_NOISE & sdebug_opts))) {
8539 char b[120];
8540 int n, len, sb;
8541
8542 len = scp->cmd_len;
8543 sb = (int)sizeof(b);
8544 if (len > 32)
8545 strcpy(b, "too long, over 32 bytes");
8546 else {
8547 for (k = 0, n = 0; k < len && n < sb; ++k)
8548 n += scnprintf(b + n, sb - n, "%02x ",
8549 (u32)cmd[k]);
8550 }
8551 sdev_printk(KERN_INFO, sdp, "%s: tag=%#x, cmd %s\n", my_name,
8552 blk_mq_unique_tag(scsi_cmd_to_rq(scp)), b);
8553 }
8554 if (unlikely(inject_now && (sdebug_opts & SDEBUG_OPT_HOST_BUSY)))
8555 return SCSI_MLQUEUE_HOST_BUSY;
8556 has_wlun_rl = (sdp->lun == SCSI_W_LUN_REPORT_LUNS);
8557 if (unlikely(lun_index >= sdebug_max_luns && !has_wlun_rl))
8558 goto err_out;
8559
8560 sdeb_i = opcode_ind_arr[opcode]; /* fully mapped */
8561 oip = &opcode_info_arr[sdeb_i]; /* safe if table consistent */
8562 devip = (struct sdebug_dev_info *)sdp->hostdata;
8563 if (unlikely(!devip)) {
8564 devip = find_build_dev_info(sdp);
8565 if (NULL == devip)
8566 goto err_out;
8567 }
8568
8569 if (sdebug_timeout_cmd(scp)) {
8570 scmd_printk(KERN_INFO, scp, "timeout command 0x%x\n", opcode);
8571 return 0;
8572 }
8573
8574 ret = sdebug_fail_queue_cmd(scp);
8575 if (ret) {
8576 scmd_printk(KERN_INFO, scp, "fail queue command 0x%x with 0x%x\n",
8577 opcode, ret);
8578 return ret;
8579 }
8580
8581 if (sdebug_fail_cmd(scp, &ret, &err)) {
8582 scmd_printk(KERN_INFO, scp,
8583 "fail command 0x%x with hostbyte=0x%x, "
8584 "driverbyte=0x%x, statusbyte=0x%x, "
8585 "sense_key=0x%x, asc=0x%x, asq=0x%x\n",
8586 opcode, err.host_byte, err.driver_byte,
8587 err.status_byte, err.sense_key, err.asc, err.asq);
8588 return ret;
8589 }
8590
8591 if (unlikely(inject_now && !atomic_read(&sdeb_inject_pending)))
8592 atomic_set(&sdeb_inject_pending, 1);
8593
8594 na = oip->num_attached;
8595 r_pfp = oip->pfp;
8596 if (na) { /* multiple commands with this opcode */
8597 r_oip = oip;
8598 if (FF_SA & r_oip->flags) {
8599 if (F_SA_LOW & oip->flags)
8600 sa = 0x1f & cmd[1];
8601 else
8602 sa = get_unaligned_be16(cmd + 8);
8603 for (k = 0; k <= na; oip = r_oip->arrp + k++) {
8604 if (opcode == oip->opcode && sa == oip->sa)
8605 break;
8606 }
8607 } else { /* since no service action only check opcode */
8608 for (k = 0; k <= na; oip = r_oip->arrp + k++) {
8609 if (opcode == oip->opcode)
8610 break;
8611 }
8612 }
8613 if (k > na) {
8614 if (F_SA_LOW & r_oip->flags)
8615 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 4);
8616 else if (F_SA_HIGH & r_oip->flags)
8617 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 8, 7);
8618 else
8619 mk_sense_invalid_opcode(scp);
8620 goto check_cond;
8621 }
8622 } /* else (when na==0) we assume the oip is a match */
8623 flags = oip->flags;
8624 if (unlikely(F_INV_OP & flags)) {
8625 mk_sense_invalid_opcode(scp);
8626 goto check_cond;
8627 }
8628 if (unlikely(has_wlun_rl && !(F_RL_WLUN_OK & flags))) {
8629 if (sdebug_verbose)
8630 sdev_printk(KERN_INFO, sdp, "%s: Opcode 0x%x not%s\n",
8631 my_name, opcode, " supported for wlun");
8632 mk_sense_invalid_opcode(scp);
8633 goto check_cond;
8634 }
8635 if (unlikely(sdebug_strict)) { /* check cdb against mask */
8636 u8 rem;
8637 int j;
8638
8639 for (k = 1; k < oip->len_mask[0] && k < 16; ++k) {
8640 rem = ~oip->len_mask[k] & cmd[k];
8641 if (rem) {
8642 for (j = 7; j >= 0; --j, rem <<= 1) {
8643 if (0x80 & rem)
8644 break;
8645 }
8646 mk_sense_invalid_fld(scp, SDEB_IN_CDB, k, j);
8647 goto check_cond;
8648 }
8649 }
8650 }
8651 if (unlikely(!(F_SKIP_UA & flags) &&
8652 find_first_bit(devip->uas_bm,
8653 SDEBUG_NUM_UAS) != SDEBUG_NUM_UAS)) {
8654 errsts = make_ua(scp, devip);
8655 if (errsts)
8656 goto check_cond;
8657 }
8658 if (unlikely(((F_M_ACCESS & flags) || scp->cmnd[0] == TEST_UNIT_READY) &&
8659 atomic_read(&devip->stopped))) {
8660 errsts = resp_not_ready(scp, devip);
8661 if (errsts)
8662 goto fini;
8663 }
8664 if (sdebug_fake_rw && (F_FAKE_RW & flags))
8665 goto fini;
8666 if (unlikely(sdebug_every_nth)) {
8667 if (fake_timeout(scp))
8668 return 0; /* ignore command: make trouble */
8669 }
8670 if (likely(oip->pfp))
8671 pfp = oip->pfp; /* calls a resp_* function */
8672 else
8673 pfp = r_pfp; /* if leaf function ptr NULL, try the root's */
8674
8675fini:
8676 if (F_DELAY_OVERR & flags) /* cmds like INQUIRY respond asap */
8677 return schedule_resp(scp, devip, errsts, pfp, 0, 0);
8678 else if ((flags & F_LONG_DELAY) && (sdebug_jdelay > 0 ||
8679 sdebug_ndelay > 10000)) {
8680 /*
8681 * Skip long delays if ndelay <= 10 microseconds. Otherwise
8682 * for Start Stop Unit (SSU) want at least 1 second delay and
8683 * if sdebug_jdelay>1 want a long delay of that many seconds.
8684 * For Synchronize Cache want 1/20 of SSU's delay.
8685 */
8686 int jdelay = (sdebug_jdelay < 2) ? 1 : sdebug_jdelay;
8687 int denom = (flags & F_SYNC_DELAY) ? 20 : 1;
8688
8689 jdelay = mult_frac(USER_HZ * jdelay, HZ, denom * USER_HZ);
8690 return schedule_resp(scp, devip, errsts, pfp, jdelay, 0);
8691 } else
8692 return schedule_resp(scp, devip, errsts, pfp, sdebug_jdelay,
8693 sdebug_ndelay);
8694check_cond:
8695 return schedule_resp(scp, devip, check_condition_result, NULL, 0, 0);
8696err_out:
8697 return schedule_resp(scp, NULL, DID_NO_CONNECT << 16, NULL, 0, 0);
8698}
8699
8700static int sdebug_init_cmd_priv(struct Scsi_Host *shost, struct scsi_cmnd *cmd)
8701{
8702 struct sdebug_scsi_cmd *sdsc = scsi_cmd_priv(cmd);
8703
8704 spin_lock_init(&sdsc->lock);
8705
8706 return 0;
8707}
8708
8709static struct scsi_host_template sdebug_driver_template = {
8710 .show_info = scsi_debug_show_info,
8711 .write_info = scsi_debug_write_info,
8712 .proc_name = sdebug_proc_name,
8713 .name = "SCSI DEBUG",
8714 .info = scsi_debug_info,
8715 .slave_alloc = scsi_debug_slave_alloc,
8716 .slave_configure = scsi_debug_slave_configure,
8717 .slave_destroy = scsi_debug_slave_destroy,
8718 .ioctl = scsi_debug_ioctl,
8719 .queuecommand = scsi_debug_queuecommand,
8720 .change_queue_depth = sdebug_change_qdepth,
8721 .map_queues = sdebug_map_queues,
8722 .mq_poll = sdebug_blk_mq_poll,
8723 .eh_abort_handler = scsi_debug_abort,
8724 .eh_device_reset_handler = scsi_debug_device_reset,
8725 .eh_target_reset_handler = scsi_debug_target_reset,
8726 .eh_bus_reset_handler = scsi_debug_bus_reset,
8727 .eh_host_reset_handler = scsi_debug_host_reset,
8728 .can_queue = SDEBUG_CANQUEUE,
8729 .this_id = 7,
8730 .sg_tablesize = SG_MAX_SEGMENTS,
8731 .cmd_per_lun = DEF_CMD_PER_LUN,
8732 .max_sectors = -1U,
8733 .max_segment_size = -1U,
8734 .module = THIS_MODULE,
8735 .track_queue_depth = 1,
8736 .cmd_size = sizeof(struct sdebug_scsi_cmd),
8737 .init_cmd_priv = sdebug_init_cmd_priv,
8738 .target_alloc = sdebug_target_alloc,
8739 .target_destroy = sdebug_target_destroy,
8740};
8741
8742static int sdebug_driver_probe(struct device *dev)
8743{
8744 int error = 0;
8745 struct sdebug_host_info *sdbg_host;
8746 struct Scsi_Host *hpnt;
8747 int hprot;
8748
8749 sdbg_host = dev_to_sdebug_host(dev);
8750
8751 sdebug_driver_template.can_queue = sdebug_max_queue;
8752 sdebug_driver_template.cmd_per_lun = sdebug_max_queue;
8753 if (!sdebug_clustering)
8754 sdebug_driver_template.dma_boundary = PAGE_SIZE - 1;
8755
8756 hpnt = scsi_host_alloc(&sdebug_driver_template, 0);
8757 if (NULL == hpnt) {
8758 pr_err("scsi_host_alloc failed\n");
8759 error = -ENODEV;
8760 return error;
8761 }
8762 if (submit_queues > nr_cpu_ids) {
8763 pr_warn("%s: trim submit_queues (was %d) to nr_cpu_ids=%u\n",
8764 my_name, submit_queues, nr_cpu_ids);
8765 submit_queues = nr_cpu_ids;
8766 }
8767 /*
8768 * Decide whether to tell scsi subsystem that we want mq. The
8769 * following should give the same answer for each host.
8770 */
8771 hpnt->nr_hw_queues = submit_queues;
8772 if (sdebug_host_max_queue)
8773 hpnt->host_tagset = 1;
8774
8775 /* poll queues are possible for nr_hw_queues > 1 */
8776 if (hpnt->nr_hw_queues == 1 || (poll_queues < 1)) {
8777 pr_warn("%s: trim poll_queues to 0. poll_q/nr_hw = (%d/%d)\n",
8778 my_name, poll_queues, hpnt->nr_hw_queues);
8779 poll_queues = 0;
8780 }
8781
8782 /*
8783 * Poll queues don't need interrupts, but we need at least one I/O queue
8784 * left over for non-polled I/O.
8785 * If condition not met, trim poll_queues to 1 (just for simplicity).
8786 */
8787 if (poll_queues >= submit_queues) {
8788 if (submit_queues < 3)
8789 pr_warn("%s: trim poll_queues to 1\n", my_name);
8790 else
8791 pr_warn("%s: trim poll_queues to 1. Perhaps try poll_queues=%d\n",
8792 my_name, submit_queues - 1);
8793 poll_queues = 1;
8794 }
8795 if (poll_queues)
8796 hpnt->nr_maps = 3;
8797
8798 sdbg_host->shost = hpnt;
8799 if ((hpnt->this_id >= 0) && (sdebug_num_tgts > hpnt->this_id))
8800 hpnt->max_id = sdebug_num_tgts + 1;
8801 else
8802 hpnt->max_id = sdebug_num_tgts;
8803 /* = sdebug_max_luns; */
8804 hpnt->max_lun = SCSI_W_LUN_REPORT_LUNS + 1;
8805
8806 hprot = 0;
8807
8808 switch (sdebug_dif) {
8809
8810 case T10_PI_TYPE1_PROTECTION:
8811 hprot = SHOST_DIF_TYPE1_PROTECTION;
8812 if (sdebug_dix)
8813 hprot |= SHOST_DIX_TYPE1_PROTECTION;
8814 break;
8815
8816 case T10_PI_TYPE2_PROTECTION:
8817 hprot = SHOST_DIF_TYPE2_PROTECTION;
8818 if (sdebug_dix)
8819 hprot |= SHOST_DIX_TYPE2_PROTECTION;
8820 break;
8821
8822 case T10_PI_TYPE3_PROTECTION:
8823 hprot = SHOST_DIF_TYPE3_PROTECTION;
8824 if (sdebug_dix)
8825 hprot |= SHOST_DIX_TYPE3_PROTECTION;
8826 break;
8827
8828 default:
8829 if (sdebug_dix)
8830 hprot |= SHOST_DIX_TYPE0_PROTECTION;
8831 break;
8832 }
8833
8834 scsi_host_set_prot(hpnt, hprot);
8835
8836 if (have_dif_prot || sdebug_dix)
8837 pr_info("host protection%s%s%s%s%s%s%s\n",
8838 (hprot & SHOST_DIF_TYPE1_PROTECTION) ? " DIF1" : "",
8839 (hprot & SHOST_DIF_TYPE2_PROTECTION) ? " DIF2" : "",
8840 (hprot & SHOST_DIF_TYPE3_PROTECTION) ? " DIF3" : "",
8841 (hprot & SHOST_DIX_TYPE0_PROTECTION) ? " DIX0" : "",
8842 (hprot & SHOST_DIX_TYPE1_PROTECTION) ? " DIX1" : "",
8843 (hprot & SHOST_DIX_TYPE2_PROTECTION) ? " DIX2" : "",
8844 (hprot & SHOST_DIX_TYPE3_PROTECTION) ? " DIX3" : "");
8845
8846 if (sdebug_guard == 1)
8847 scsi_host_set_guard(hpnt, SHOST_DIX_GUARD_IP);
8848 else
8849 scsi_host_set_guard(hpnt, SHOST_DIX_GUARD_CRC);
8850
8851 sdebug_verbose = !!(SDEBUG_OPT_NOISE & sdebug_opts);
8852 sdebug_any_injecting_opt = !!(SDEBUG_OPT_ALL_INJECTING & sdebug_opts);
8853 if (sdebug_every_nth) /* need stats counters for every_nth */
8854 sdebug_statistics = true;
8855 error = scsi_add_host(hpnt, &sdbg_host->dev);
8856 if (error) {
8857 pr_err("scsi_add_host failed\n");
8858 error = -ENODEV;
8859 scsi_host_put(hpnt);
8860 } else {
8861 scsi_scan_host(hpnt);
8862 }
8863
8864 return error;
8865}
8866
8867static void sdebug_driver_remove(struct device *dev)
8868{
8869 struct sdebug_host_info *sdbg_host;
8870 struct sdebug_dev_info *sdbg_devinfo, *tmp;
8871
8872 sdbg_host = dev_to_sdebug_host(dev);
8873
8874 scsi_remove_host(sdbg_host->shost);
8875
8876 list_for_each_entry_safe(sdbg_devinfo, tmp, &sdbg_host->dev_info_list,
8877 dev_list) {
8878 list_del(&sdbg_devinfo->dev_list);
8879 kfree(sdbg_devinfo->zstate);
8880 kfree(sdbg_devinfo);
8881 }
8882
8883 scsi_host_put(sdbg_host->shost);
8884}
8885
8886static const struct bus_type pseudo_lld_bus = {
8887 .name = "pseudo",
8888 .probe = sdebug_driver_probe,
8889 .remove = sdebug_driver_remove,
8890 .drv_groups = sdebug_drv_groups,
8891};