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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 - 2020 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
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/genhd.h>
27#include <linux/fs.h>
28#include <linux/init.h>
29#include <linux/proc_fs.h>
30#include <linux/vmalloc.h>
31#include <linux/moduleparam.h>
32#include <linux/scatterlist.h>
33#include <linux/blkdev.h>
34#include <linux/crc-t10dif.h>
35#include <linux/spinlock.h>
36#include <linux/interrupt.h>
37#include <linux/atomic.h>
38#include <linux/hrtimer.h>
39#include <linux/uuid.h>
40#include <linux/t10-pi.h>
41#include <linux/msdos_partition.h>
42#include <linux/random.h>
43#include <linux/xarray.h>
44#include <linux/prefetch.h>
45
46#include <net/checksum.h>
47
48#include <asm/unaligned.h>
49
50#include <scsi/scsi.h>
51#include <scsi/scsi_cmnd.h>
52#include <scsi/scsi_device.h>
53#include <scsi/scsi_host.h>
54#include <scsi/scsicam.h>
55#include <scsi/scsi_eh.h>
56#include <scsi/scsi_tcq.h>
57#include <scsi/scsi_dbg.h>
58
59#include "sd.h"
60#include "scsi_logging.h"
61
62/* make sure inq_product_rev string corresponds to this version */
63#define SDEBUG_VERSION "0190" /* format to fit INQUIRY revision field */
64static const char *sdebug_version_date = "20200710";
65
66#define MY_NAME "scsi_debug"
67
68/* Additional Sense Code (ASC) */
69#define NO_ADDITIONAL_SENSE 0x0
70#define LOGICAL_UNIT_NOT_READY 0x4
71#define LOGICAL_UNIT_COMMUNICATION_FAILURE 0x8
72#define UNRECOVERED_READ_ERR 0x11
73#define PARAMETER_LIST_LENGTH_ERR 0x1a
74#define INVALID_OPCODE 0x20
75#define LBA_OUT_OF_RANGE 0x21
76#define INVALID_FIELD_IN_CDB 0x24
77#define INVALID_FIELD_IN_PARAM_LIST 0x26
78#define WRITE_PROTECTED 0x27
79#define UA_RESET_ASC 0x29
80#define UA_CHANGED_ASC 0x2a
81#define TARGET_CHANGED_ASC 0x3f
82#define LUNS_CHANGED_ASCQ 0x0e
83#define INSUFF_RES_ASC 0x55
84#define INSUFF_RES_ASCQ 0x3
85#define POWER_ON_RESET_ASCQ 0x0
86#define BUS_RESET_ASCQ 0x2 /* scsi bus reset occurred */
87#define MODE_CHANGED_ASCQ 0x1 /* mode parameters changed */
88#define CAPACITY_CHANGED_ASCQ 0x9
89#define SAVING_PARAMS_UNSUP 0x39
90#define TRANSPORT_PROBLEM 0x4b
91#define THRESHOLD_EXCEEDED 0x5d
92#define LOW_POWER_COND_ON 0x5e
93#define MISCOMPARE_VERIFY_ASC 0x1d
94#define MICROCODE_CHANGED_ASCQ 0x1 /* with TARGET_CHANGED_ASC */
95#define MICROCODE_CHANGED_WO_RESET_ASCQ 0x16
96#define WRITE_ERROR_ASC 0xc
97#define UNALIGNED_WRITE_ASCQ 0x4
98#define WRITE_BOUNDARY_ASCQ 0x5
99#define READ_INVDATA_ASCQ 0x6
100#define READ_BOUNDARY_ASCQ 0x7
101#define INSUFF_ZONE_ASCQ 0xe
102
103/* Additional Sense Code Qualifier (ASCQ) */
104#define ACK_NAK_TO 0x3
105
106/* Default values for driver parameters */
107#define DEF_NUM_HOST 1
108#define DEF_NUM_TGTS 1
109#define DEF_MAX_LUNS 1
110/* With these defaults, this driver will make 1 host with 1 target
111 * (id 0) containing 1 logical unit (lun 0). That is 1 device.
112 */
113#define DEF_ATO 1
114#define DEF_CDB_LEN 10
115#define DEF_JDELAY 1 /* if > 0 unit is a jiffy */
116#define DEF_DEV_SIZE_PRE_INIT 0
117#define DEF_DEV_SIZE_MB 8
118#define DEF_ZBC_DEV_SIZE_MB 128
119#define DEF_DIF 0
120#define DEF_DIX 0
121#define DEF_PER_HOST_STORE false
122#define DEF_D_SENSE 0
123#define DEF_EVERY_NTH 0
124#define DEF_FAKE_RW 0
125#define DEF_GUARD 0
126#define DEF_HOST_LOCK 0
127#define DEF_LBPU 0
128#define DEF_LBPWS 0
129#define DEF_LBPWS10 0
130#define DEF_LBPRZ 1
131#define DEF_LOWEST_ALIGNED 0
132#define DEF_NDELAY 0 /* if > 0 unit is a nanosecond */
133#define DEF_NO_LUN_0 0
134#define DEF_NUM_PARTS 0
135#define DEF_OPTS 0
136#define DEF_OPT_BLKS 1024
137#define DEF_PHYSBLK_EXP 0
138#define DEF_OPT_XFERLEN_EXP 0
139#define DEF_PTYPE TYPE_DISK
140#define DEF_RANDOM false
141#define DEF_REMOVABLE false
142#define DEF_SCSI_LEVEL 7 /* INQUIRY, byte2 [6->SPC-4; 7->SPC-5] */
143#define DEF_SECTOR_SIZE 512
144#define DEF_UNMAP_ALIGNMENT 0
145#define DEF_UNMAP_GRANULARITY 1
146#define DEF_UNMAP_MAX_BLOCKS 0xFFFFFFFF
147#define DEF_UNMAP_MAX_DESC 256
148#define DEF_VIRTUAL_GB 0
149#define DEF_VPD_USE_HOSTNO 1
150#define DEF_WRITESAME_LENGTH 0xFFFF
151#define DEF_STRICT 0
152#define DEF_STATISTICS false
153#define DEF_SUBMIT_QUEUES 1
154#define DEF_TUR_MS_TO_READY 0
155#define DEF_UUID_CTL 0
156#define JDELAY_OVERRIDDEN -9999
157
158/* Default parameters for ZBC drives */
159#define DEF_ZBC_ZONE_SIZE_MB 128
160#define DEF_ZBC_MAX_OPEN_ZONES 8
161#define DEF_ZBC_NR_CONV_ZONES 1
162
163#define SDEBUG_LUN_0_VAL 0
164
165/* bit mask values for sdebug_opts */
166#define SDEBUG_OPT_NOISE 1
167#define SDEBUG_OPT_MEDIUM_ERR 2
168#define SDEBUG_OPT_TIMEOUT 4
169#define SDEBUG_OPT_RECOVERED_ERR 8
170#define SDEBUG_OPT_TRANSPORT_ERR 16
171#define SDEBUG_OPT_DIF_ERR 32
172#define SDEBUG_OPT_DIX_ERR 64
173#define SDEBUG_OPT_MAC_TIMEOUT 128
174#define SDEBUG_OPT_SHORT_TRANSFER 0x100
175#define SDEBUG_OPT_Q_NOISE 0x200
176#define SDEBUG_OPT_ALL_TSF 0x400
177#define SDEBUG_OPT_RARE_TSF 0x800
178#define SDEBUG_OPT_N_WCE 0x1000
179#define SDEBUG_OPT_RESET_NOISE 0x2000
180#define SDEBUG_OPT_NO_CDB_NOISE 0x4000
181#define SDEBUG_OPT_HOST_BUSY 0x8000
182#define SDEBUG_OPT_CMD_ABORT 0x10000
183#define SDEBUG_OPT_ALL_NOISE (SDEBUG_OPT_NOISE | SDEBUG_OPT_Q_NOISE | \
184 SDEBUG_OPT_RESET_NOISE)
185#define SDEBUG_OPT_ALL_INJECTING (SDEBUG_OPT_RECOVERED_ERR | \
186 SDEBUG_OPT_TRANSPORT_ERR | \
187 SDEBUG_OPT_DIF_ERR | SDEBUG_OPT_DIX_ERR | \
188 SDEBUG_OPT_SHORT_TRANSFER | \
189 SDEBUG_OPT_HOST_BUSY | \
190 SDEBUG_OPT_CMD_ABORT)
191#define SDEBUG_OPT_RECOV_DIF_DIX (SDEBUG_OPT_RECOVERED_ERR | \
192 SDEBUG_OPT_DIF_ERR | SDEBUG_OPT_DIX_ERR)
193
194/* As indicated in SAM-5 and SPC-4 Unit Attentions (UAs) are returned in
195 * priority order. In the subset implemented here lower numbers have higher
196 * priority. The UA numbers should be a sequence starting from 0 with
197 * SDEBUG_NUM_UAS being 1 higher than the highest numbered UA. */
198#define SDEBUG_UA_POR 0 /* Power on, reset, or bus device reset */
199#define SDEBUG_UA_BUS_RESET 1
200#define SDEBUG_UA_MODE_CHANGED 2
201#define SDEBUG_UA_CAPACITY_CHANGED 3
202#define SDEBUG_UA_LUNS_CHANGED 4
203#define SDEBUG_UA_MICROCODE_CHANGED 5 /* simulate firmware change */
204#define SDEBUG_UA_MICROCODE_CHANGED_WO_RESET 6
205#define SDEBUG_NUM_UAS 7
206
207/* when 1==SDEBUG_OPT_MEDIUM_ERR, a medium error is simulated at this
208 * sector on read commands: */
209#define OPT_MEDIUM_ERR_ADDR 0x1234 /* that's sector 4660 in decimal */
210#define OPT_MEDIUM_ERR_NUM 10 /* number of consecutive medium errs */
211
212/* SDEBUG_CANQUEUE is the maximum number of commands that can be queued
213 * (for response) per submit queue at one time. Can be reduced by max_queue
214 * option. Command responses are not queued when jdelay=0 and ndelay=0. The
215 * per-device DEF_CMD_PER_LUN can be changed via sysfs:
216 * /sys/class/scsi_device/<h:c:t:l>/device/queue_depth
217 * but cannot exceed SDEBUG_CANQUEUE .
218 */
219#define SDEBUG_CANQUEUE_WORDS 3 /* a WORD is bits in a long */
220#define SDEBUG_CANQUEUE (SDEBUG_CANQUEUE_WORDS * BITS_PER_LONG)
221#define DEF_CMD_PER_LUN SDEBUG_CANQUEUE
222
223/* UA - Unit Attention; SA - Service Action; SSU - Start Stop Unit */
224#define F_D_IN 1 /* Data-in command (e.g. READ) */
225#define F_D_OUT 2 /* Data-out command (e.g. WRITE) */
226#define F_D_OUT_MAYBE 4 /* WRITE SAME, NDOB bit */
227#define F_D_UNKN 8
228#define F_RL_WLUN_OK 0x10 /* allowed with REPORT LUNS W-LUN */
229#define F_SKIP_UA 0x20 /* bypass UAs (e.g. INQUIRY command) */
230#define F_DELAY_OVERR 0x40 /* for commands like INQUIRY */
231#define F_SA_LOW 0x80 /* SA is in cdb byte 1, bits 4 to 0 */
232#define F_SA_HIGH 0x100 /* SA is in cdb bytes 8 and 9 */
233#define F_INV_OP 0x200 /* invalid opcode (not supported) */
234#define F_FAKE_RW 0x400 /* bypass resp_*() when fake_rw set */
235#define F_M_ACCESS 0x800 /* media access, reacts to SSU state */
236#define F_SSU_DELAY 0x1000 /* SSU command delay (long-ish) */
237#define F_SYNC_DELAY 0x2000 /* SYNCHRONIZE CACHE delay */
238
239/* Useful combinations of the above flags */
240#define FF_RESPOND (F_RL_WLUN_OK | F_SKIP_UA | F_DELAY_OVERR)
241#define FF_MEDIA_IO (F_M_ACCESS | F_FAKE_RW)
242#define FF_SA (F_SA_HIGH | F_SA_LOW)
243#define F_LONG_DELAY (F_SSU_DELAY | F_SYNC_DELAY)
244
245#define SDEBUG_MAX_PARTS 4
246
247#define SDEBUG_MAX_CMD_LEN 32
248
249#define SDEB_XA_NOT_IN_USE XA_MARK_1
250
251/* Zone types (zbcr05 table 25) */
252enum sdebug_z_type {
253 ZBC_ZONE_TYPE_CNV = 0x1,
254 ZBC_ZONE_TYPE_SWR = 0x2,
255 ZBC_ZONE_TYPE_SWP = 0x3,
256};
257
258/* enumeration names taken from table 26, zbcr05 */
259enum sdebug_z_cond {
260 ZBC_NOT_WRITE_POINTER = 0x0,
261 ZC1_EMPTY = 0x1,
262 ZC2_IMPLICIT_OPEN = 0x2,
263 ZC3_EXPLICIT_OPEN = 0x3,
264 ZC4_CLOSED = 0x4,
265 ZC6_READ_ONLY = 0xd,
266 ZC5_FULL = 0xe,
267 ZC7_OFFLINE = 0xf,
268};
269
270struct sdeb_zone_state { /* ZBC: per zone state */
271 enum sdebug_z_type z_type;
272 enum sdebug_z_cond z_cond;
273 bool z_non_seq_resource;
274 unsigned int z_size;
275 sector_t z_start;
276 sector_t z_wp;
277};
278
279struct sdebug_dev_info {
280 struct list_head dev_list;
281 unsigned int channel;
282 unsigned int target;
283 u64 lun;
284 uuid_t lu_name;
285 struct sdebug_host_info *sdbg_host;
286 unsigned long uas_bm[1];
287 atomic_t num_in_q;
288 atomic_t stopped; /* 1: by SSU, 2: device start */
289 bool used;
290
291 /* For ZBC devices */
292 enum blk_zoned_model zmodel;
293 unsigned int zsize;
294 unsigned int zsize_shift;
295 unsigned int nr_zones;
296 unsigned int nr_conv_zones;
297 unsigned int nr_imp_open;
298 unsigned int nr_exp_open;
299 unsigned int nr_closed;
300 unsigned int max_open;
301 ktime_t create_ts; /* time since bootup that this device was created */
302 struct sdeb_zone_state *zstate;
303};
304
305struct sdebug_host_info {
306 struct list_head host_list;
307 int si_idx; /* sdeb_store_info (per host) xarray index */
308 struct Scsi_Host *shost;
309 struct device dev;
310 struct list_head dev_info_list;
311};
312
313/* There is an xarray of pointers to this struct's objects, one per host */
314struct sdeb_store_info {
315 rwlock_t macc_lck; /* for atomic media access on this store */
316 u8 *storep; /* user data storage (ram) */
317 struct t10_pi_tuple *dif_storep; /* protection info */
318 void *map_storep; /* provisioning map */
319};
320
321#define to_sdebug_host(d) \
322 container_of(d, struct sdebug_host_info, dev)
323
324enum sdeb_defer_type {SDEB_DEFER_NONE = 0, SDEB_DEFER_HRT = 1,
325 SDEB_DEFER_WQ = 2, SDEB_DEFER_POLL = 3};
326
327struct sdebug_defer {
328 struct hrtimer hrt;
329 struct execute_work ew;
330 ktime_t cmpl_ts;/* time since boot to complete this cmd */
331 int sqa_idx; /* index of sdebug_queue array */
332 int qc_idx; /* index of sdebug_queued_cmd array within sqa_idx */
333 int hc_idx; /* hostwide tag index */
334 int issuing_cpu;
335 bool init_hrt;
336 bool init_wq;
337 bool init_poll;
338 bool aborted; /* true when blk_abort_request() already called */
339 enum sdeb_defer_type defer_t;
340};
341
342struct sdebug_queued_cmd {
343 /* corresponding bit set in in_use_bm[] in owning struct sdebug_queue
344 * instance indicates this slot is in use.
345 */
346 struct sdebug_defer *sd_dp;
347 struct scsi_cmnd *a_cmnd;
348};
349
350struct sdebug_queue {
351 struct sdebug_queued_cmd qc_arr[SDEBUG_CANQUEUE];
352 unsigned long in_use_bm[SDEBUG_CANQUEUE_WORDS];
353 spinlock_t qc_lock;
354 atomic_t blocked; /* to temporarily stop more being queued */
355};
356
357static atomic_t sdebug_cmnd_count; /* number of incoming commands */
358static atomic_t sdebug_completions; /* count of deferred completions */
359static atomic_t sdebug_miss_cpus; /* submission + completion cpus differ */
360static atomic_t sdebug_a_tsf; /* 'almost task set full' counter */
361static atomic_t sdeb_inject_pending;
362static atomic_t sdeb_mq_poll_count; /* bumped when mq_poll returns > 0 */
363
364struct opcode_info_t {
365 u8 num_attached; /* 0 if this is it (i.e. a leaf); use 0xff */
366 /* for terminating element */
367 u8 opcode; /* if num_attached > 0, preferred */
368 u16 sa; /* service action */
369 u32 flags; /* OR-ed set of SDEB_F_* */
370 int (*pfp)(struct scsi_cmnd *, struct sdebug_dev_info *);
371 const struct opcode_info_t *arrp; /* num_attached elements or NULL */
372 u8 len_mask[16]; /* len_mask[0]-->cdb_len, then mask for cdb */
373 /* 1 to min(cdb_len, 15); ignore cdb[15...] */
374};
375
376/* SCSI opcodes (first byte of cdb) of interest mapped onto these indexes */
377enum sdeb_opcode_index {
378 SDEB_I_INVALID_OPCODE = 0,
379 SDEB_I_INQUIRY = 1,
380 SDEB_I_REPORT_LUNS = 2,
381 SDEB_I_REQUEST_SENSE = 3,
382 SDEB_I_TEST_UNIT_READY = 4,
383 SDEB_I_MODE_SENSE = 5, /* 6, 10 */
384 SDEB_I_MODE_SELECT = 6, /* 6, 10 */
385 SDEB_I_LOG_SENSE = 7,
386 SDEB_I_READ_CAPACITY = 8, /* 10; 16 is in SA_IN(16) */
387 SDEB_I_READ = 9, /* 6, 10, 12, 16 */
388 SDEB_I_WRITE = 10, /* 6, 10, 12, 16 */
389 SDEB_I_START_STOP = 11,
390 SDEB_I_SERV_ACT_IN_16 = 12, /* add ...SERV_ACT_IN_12 if needed */
391 SDEB_I_SERV_ACT_OUT_16 = 13, /* add ...SERV_ACT_OUT_12 if needed */
392 SDEB_I_MAINT_IN = 14,
393 SDEB_I_MAINT_OUT = 15,
394 SDEB_I_VERIFY = 16, /* VERIFY(10), VERIFY(16) */
395 SDEB_I_VARIABLE_LEN = 17, /* READ(32), WRITE(32), WR_SCAT(32) */
396 SDEB_I_RESERVE = 18, /* 6, 10 */
397 SDEB_I_RELEASE = 19, /* 6, 10 */
398 SDEB_I_ALLOW_REMOVAL = 20, /* PREVENT ALLOW MEDIUM REMOVAL */
399 SDEB_I_REZERO_UNIT = 21, /* REWIND in SSC */
400 SDEB_I_ATA_PT = 22, /* 12, 16 */
401 SDEB_I_SEND_DIAG = 23,
402 SDEB_I_UNMAP = 24,
403 SDEB_I_WRITE_BUFFER = 25,
404 SDEB_I_WRITE_SAME = 26, /* 10, 16 */
405 SDEB_I_SYNC_CACHE = 27, /* 10, 16 */
406 SDEB_I_COMP_WRITE = 28,
407 SDEB_I_PRE_FETCH = 29, /* 10, 16 */
408 SDEB_I_ZONE_OUT = 30, /* 0x94+SA; includes no data xfer */
409 SDEB_I_ZONE_IN = 31, /* 0x95+SA; all have data-in */
410 SDEB_I_LAST_ELEM_P1 = 32, /* keep this last (previous + 1) */
411};
412
413
414static const unsigned char opcode_ind_arr[256] = {
415/* 0x0; 0x0->0x1f: 6 byte cdbs */
416 SDEB_I_TEST_UNIT_READY, SDEB_I_REZERO_UNIT, 0, SDEB_I_REQUEST_SENSE,
417 0, 0, 0, 0,
418 SDEB_I_READ, 0, SDEB_I_WRITE, 0, 0, 0, 0, 0,
419 0, 0, SDEB_I_INQUIRY, 0, 0, SDEB_I_MODE_SELECT, SDEB_I_RESERVE,
420 SDEB_I_RELEASE,
421 0, 0, SDEB_I_MODE_SENSE, SDEB_I_START_STOP, 0, SDEB_I_SEND_DIAG,
422 SDEB_I_ALLOW_REMOVAL, 0,
423/* 0x20; 0x20->0x3f: 10 byte cdbs */
424 0, 0, 0, 0, 0, SDEB_I_READ_CAPACITY, 0, 0,
425 SDEB_I_READ, 0, SDEB_I_WRITE, 0, 0, 0, 0, SDEB_I_VERIFY,
426 0, 0, 0, 0, SDEB_I_PRE_FETCH, SDEB_I_SYNC_CACHE, 0, 0,
427 0, 0, 0, SDEB_I_WRITE_BUFFER, 0, 0, 0, 0,
428/* 0x40; 0x40->0x5f: 10 byte cdbs */
429 0, SDEB_I_WRITE_SAME, SDEB_I_UNMAP, 0, 0, 0, 0, 0,
430 0, 0, 0, 0, 0, SDEB_I_LOG_SENSE, 0, 0,
431 0, 0, 0, 0, 0, SDEB_I_MODE_SELECT, SDEB_I_RESERVE,
432 SDEB_I_RELEASE,
433 0, 0, SDEB_I_MODE_SENSE, 0, 0, 0, 0, 0,
434/* 0x60; 0x60->0x7d are reserved, 0x7e is "extended cdb" */
435 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
436 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
437 0, SDEB_I_VARIABLE_LEN,
438/* 0x80; 0x80->0x9f: 16 byte cdbs */
439 0, 0, 0, 0, 0, SDEB_I_ATA_PT, 0, 0,
440 SDEB_I_READ, SDEB_I_COMP_WRITE, SDEB_I_WRITE, 0,
441 0, 0, 0, SDEB_I_VERIFY,
442 SDEB_I_PRE_FETCH, SDEB_I_SYNC_CACHE, 0, SDEB_I_WRITE_SAME,
443 SDEB_I_ZONE_OUT, SDEB_I_ZONE_IN, 0, 0,
444 0, 0, 0, 0, 0, 0, SDEB_I_SERV_ACT_IN_16, SDEB_I_SERV_ACT_OUT_16,
445/* 0xa0; 0xa0->0xbf: 12 byte cdbs */
446 SDEB_I_REPORT_LUNS, SDEB_I_ATA_PT, 0, SDEB_I_MAINT_IN,
447 SDEB_I_MAINT_OUT, 0, 0, 0,
448 SDEB_I_READ, 0 /* SDEB_I_SERV_ACT_OUT_12 */, SDEB_I_WRITE,
449 0 /* SDEB_I_SERV_ACT_IN_12 */, 0, 0, 0, 0,
450 0, 0, 0, 0, 0, 0, 0, 0,
451 0, 0, 0, 0, 0, 0, 0, 0,
452/* 0xc0; 0xc0->0xff: vendor specific */
453 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
454 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
455 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
456 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
457};
458
459/*
460 * The following "response" functions return the SCSI mid-level's 4 byte
461 * tuple-in-an-int. To handle commands with an IMMED bit, for a faster
462 * command completion, they can mask their return value with
463 * SDEG_RES_IMMED_MASK .
464 */
465#define SDEG_RES_IMMED_MASK 0x40000000
466
467static int resp_inquiry(struct scsi_cmnd *, struct sdebug_dev_info *);
468static int resp_report_luns(struct scsi_cmnd *, struct sdebug_dev_info *);
469static int resp_requests(struct scsi_cmnd *, struct sdebug_dev_info *);
470static int resp_mode_sense(struct scsi_cmnd *, struct sdebug_dev_info *);
471static int resp_mode_select(struct scsi_cmnd *, struct sdebug_dev_info *);
472static int resp_log_sense(struct scsi_cmnd *, struct sdebug_dev_info *);
473static int resp_readcap(struct scsi_cmnd *, struct sdebug_dev_info *);
474static int resp_read_dt0(struct scsi_cmnd *, struct sdebug_dev_info *);
475static int resp_write_dt0(struct scsi_cmnd *, struct sdebug_dev_info *);
476static int resp_write_scat(struct scsi_cmnd *, struct sdebug_dev_info *);
477static int resp_start_stop(struct scsi_cmnd *, struct sdebug_dev_info *);
478static int resp_readcap16(struct scsi_cmnd *, struct sdebug_dev_info *);
479static int resp_get_lba_status(struct scsi_cmnd *, struct sdebug_dev_info *);
480static int resp_report_tgtpgs(struct scsi_cmnd *, struct sdebug_dev_info *);
481static int resp_unmap(struct scsi_cmnd *, struct sdebug_dev_info *);
482static int resp_rsup_opcodes(struct scsi_cmnd *, struct sdebug_dev_info *);
483static int resp_rsup_tmfs(struct scsi_cmnd *, struct sdebug_dev_info *);
484static int resp_verify(struct scsi_cmnd *, struct sdebug_dev_info *);
485static int resp_write_same_10(struct scsi_cmnd *, struct sdebug_dev_info *);
486static int resp_write_same_16(struct scsi_cmnd *, struct sdebug_dev_info *);
487static int resp_comp_write(struct scsi_cmnd *, struct sdebug_dev_info *);
488static int resp_write_buffer(struct scsi_cmnd *, struct sdebug_dev_info *);
489static int resp_sync_cache(struct scsi_cmnd *, struct sdebug_dev_info *);
490static int resp_pre_fetch(struct scsi_cmnd *, struct sdebug_dev_info *);
491static int resp_report_zones(struct scsi_cmnd *, struct sdebug_dev_info *);
492static int resp_open_zone(struct scsi_cmnd *, struct sdebug_dev_info *);
493static int resp_close_zone(struct scsi_cmnd *, struct sdebug_dev_info *);
494static int resp_finish_zone(struct scsi_cmnd *, struct sdebug_dev_info *);
495static int resp_rwp_zone(struct scsi_cmnd *, struct sdebug_dev_info *);
496
497static int sdebug_do_add_host(bool mk_new_store);
498static int sdebug_add_host_helper(int per_host_idx);
499static void sdebug_do_remove_host(bool the_end);
500static int sdebug_add_store(void);
501static void sdebug_erase_store(int idx, struct sdeb_store_info *sip);
502static void sdebug_erase_all_stores(bool apart_from_first);
503
504/*
505 * The following are overflow arrays for cdbs that "hit" the same index in
506 * the opcode_info_arr array. The most time sensitive (or commonly used) cdb
507 * should be placed in opcode_info_arr[], the others should be placed here.
508 */
509static const struct opcode_info_t msense_iarr[] = {
510 {0, 0x1a, 0, F_D_IN, NULL, NULL,
511 {6, 0xe8, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
512};
513
514static const struct opcode_info_t mselect_iarr[] = {
515 {0, 0x15, 0, F_D_OUT, NULL, NULL,
516 {6, 0xf1, 0, 0, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
517};
518
519static const struct opcode_info_t read_iarr[] = {
520 {0, 0x28, 0, F_D_IN | FF_MEDIA_IO, resp_read_dt0, NULL,/* READ(10) */
521 {10, 0xff, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xff, 0xff, 0xc7, 0, 0,
522 0, 0, 0, 0} },
523 {0, 0x8, 0, F_D_IN | FF_MEDIA_IO, resp_read_dt0, NULL, /* READ(6) */
524 {6, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
525 {0, 0xa8, 0, F_D_IN | FF_MEDIA_IO, resp_read_dt0, NULL,/* READ(12) */
526 {12, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xbf,
527 0xc7, 0, 0, 0, 0} },
528};
529
530static const struct opcode_info_t write_iarr[] = {
531 {0, 0x2a, 0, F_D_OUT | FF_MEDIA_IO, resp_write_dt0, /* WRITE(10) */
532 NULL, {10, 0xfb, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xff, 0xff, 0xc7,
533 0, 0, 0, 0, 0, 0} },
534 {0, 0xa, 0, F_D_OUT | FF_MEDIA_IO, resp_write_dt0, /* WRITE(6) */
535 NULL, {6, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0,
536 0, 0, 0} },
537 {0, 0xaa, 0, F_D_OUT | FF_MEDIA_IO, resp_write_dt0, /* WRITE(12) */
538 NULL, {12, 0xfb, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
539 0xbf, 0xc7, 0, 0, 0, 0} },
540};
541
542static const struct opcode_info_t verify_iarr[] = {
543 {0, 0x2f, 0, F_D_OUT_MAYBE | FF_MEDIA_IO, resp_verify,/* VERIFY(10) */
544 NULL, {10, 0xf7, 0xff, 0xff, 0xff, 0xff, 0xbf, 0xff, 0xff, 0xc7,
545 0, 0, 0, 0, 0, 0} },
546};
547
548static const struct opcode_info_t sa_in_16_iarr[] = {
549 {0, 0x9e, 0x12, F_SA_LOW | F_D_IN, resp_get_lba_status, NULL,
550 {16, 0x12, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
551 0xff, 0xff, 0xff, 0, 0xc7} }, /* GET LBA STATUS(16) */
552};
553
554static const struct opcode_info_t vl_iarr[] = { /* VARIABLE LENGTH */
555 {0, 0x7f, 0xb, F_SA_HIGH | F_D_OUT | FF_MEDIA_IO, resp_write_dt0,
556 NULL, {32, 0xc7, 0, 0, 0, 0, 0x3f, 0x18, 0x0, 0xb, 0xfa,
557 0, 0xff, 0xff, 0xff, 0xff} }, /* WRITE(32) */
558 {0, 0x7f, 0x11, F_SA_HIGH | F_D_OUT | FF_MEDIA_IO, resp_write_scat,
559 NULL, {32, 0xc7, 0, 0, 0, 0, 0x3f, 0x18, 0x0, 0x11, 0xf8,
560 0, 0xff, 0xff, 0x0, 0x0} }, /* WRITE SCATTERED(32) */
561};
562
563static const struct opcode_info_t maint_in_iarr[] = { /* MAINT IN */
564 {0, 0xa3, 0xc, F_SA_LOW | F_D_IN, resp_rsup_opcodes, NULL,
565 {12, 0xc, 0x87, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0,
566 0xc7, 0, 0, 0, 0} }, /* REPORT SUPPORTED OPERATION CODES */
567 {0, 0xa3, 0xd, F_SA_LOW | F_D_IN, resp_rsup_tmfs, NULL,
568 {12, 0xd, 0x80, 0, 0, 0, 0xff, 0xff, 0xff, 0xff, 0, 0xc7, 0, 0,
569 0, 0} }, /* REPORTED SUPPORTED TASK MANAGEMENT FUNCTIONS */
570};
571
572static const struct opcode_info_t write_same_iarr[] = {
573 {0, 0x93, 0, F_D_OUT_MAYBE | FF_MEDIA_IO, resp_write_same_16, NULL,
574 {16, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
575 0xff, 0xff, 0xff, 0x3f, 0xc7} }, /* WRITE SAME(16) */
576};
577
578static const struct opcode_info_t reserve_iarr[] = {
579 {0, 0x16, 0, F_D_OUT, NULL, NULL, /* RESERVE(6) */
580 {6, 0x1f, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
581};
582
583static const struct opcode_info_t release_iarr[] = {
584 {0, 0x17, 0, F_D_OUT, NULL, NULL, /* RELEASE(6) */
585 {6, 0x1f, 0xff, 0, 0, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
586};
587
588static const struct opcode_info_t sync_cache_iarr[] = {
589 {0, 0x91, 0, F_SYNC_DELAY | F_M_ACCESS, resp_sync_cache, NULL,
590 {16, 0x6, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
591 0xff, 0xff, 0xff, 0xff, 0x3f, 0xc7} }, /* SYNC_CACHE (16) */
592};
593
594static const struct opcode_info_t pre_fetch_iarr[] = {
595 {0, 0x90, 0, F_SYNC_DELAY | FF_MEDIA_IO, resp_pre_fetch, NULL,
596 {16, 0x2, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
597 0xff, 0xff, 0xff, 0xff, 0x3f, 0xc7} }, /* PRE-FETCH (16) */
598};
599
600static const struct opcode_info_t zone_out_iarr[] = { /* ZONE OUT(16) */
601 {0, 0x94, 0x1, F_SA_LOW | F_M_ACCESS, resp_close_zone, NULL,
602 {16, 0x1, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
603 0xff, 0, 0, 0xff, 0xff, 0x1, 0xc7} }, /* CLOSE ZONE */
604 {0, 0x94, 0x2, F_SA_LOW | F_M_ACCESS, resp_finish_zone, NULL,
605 {16, 0x2, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
606 0xff, 0, 0, 0xff, 0xff, 0x1, 0xc7} }, /* FINISH ZONE */
607 {0, 0x94, 0x4, F_SA_LOW | F_M_ACCESS, resp_rwp_zone, NULL,
608 {16, 0x4, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
609 0xff, 0, 0, 0xff, 0xff, 0x1, 0xc7} }, /* RESET WRITE POINTER */
610};
611
612static const struct opcode_info_t zone_in_iarr[] = { /* ZONE IN(16) */
613 {0, 0x95, 0x6, F_SA_LOW | F_D_IN | F_M_ACCESS, NULL, NULL,
614 {16, 0x6, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
615 0xff, 0xff, 0xff, 0xff, 0x3f, 0xc7} }, /* REPORT ZONES */
616};
617
618
619/* This array is accessed via SDEB_I_* values. Make sure all are mapped,
620 * plus the terminating elements for logic that scans this table such as
621 * REPORT SUPPORTED OPERATION CODES. */
622static const struct opcode_info_t opcode_info_arr[SDEB_I_LAST_ELEM_P1 + 1] = {
623/* 0 */
624 {0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL, /* unknown opcodes */
625 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
626 {0, 0x12, 0, FF_RESPOND | F_D_IN, resp_inquiry, NULL, /* INQUIRY */
627 {6, 0xe3, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
628 {0, 0xa0, 0, FF_RESPOND | F_D_IN, resp_report_luns, NULL,
629 {12, 0xe3, 0xff, 0, 0, 0, 0xff, 0xff, 0xff, 0xff, 0, 0xc7, 0, 0,
630 0, 0} }, /* REPORT LUNS */
631 {0, 0x3, 0, FF_RESPOND | F_D_IN, resp_requests, NULL,
632 {6, 0xe1, 0, 0, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
633 {0, 0x0, 0, F_M_ACCESS | F_RL_WLUN_OK, NULL, NULL,/* TEST UNIT READY */
634 {6, 0, 0, 0, 0, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
635/* 5 */
636 {ARRAY_SIZE(msense_iarr), 0x5a, 0, F_D_IN, /* MODE SENSE(10) */
637 resp_mode_sense, msense_iarr, {10, 0xf8, 0xff, 0xff, 0, 0, 0,
638 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0} },
639 {ARRAY_SIZE(mselect_iarr), 0x55, 0, F_D_OUT, /* MODE SELECT(10) */
640 resp_mode_select, mselect_iarr, {10, 0xf1, 0, 0, 0, 0, 0, 0xff,
641 0xff, 0xc7, 0, 0, 0, 0, 0, 0} },
642 {0, 0x4d, 0, F_D_IN, resp_log_sense, NULL, /* LOG SENSE */
643 {10, 0xe3, 0xff, 0xff, 0, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0,
644 0, 0, 0} },
645 {0, 0x25, 0, F_D_IN, resp_readcap, NULL, /* READ CAPACITY(10) */
646 {10, 0xe1, 0xff, 0xff, 0xff, 0xff, 0, 0, 0x1, 0xc7, 0, 0, 0, 0,
647 0, 0} },
648 {ARRAY_SIZE(read_iarr), 0x88, 0, F_D_IN | FF_MEDIA_IO, /* READ(16) */
649 resp_read_dt0, read_iarr, {16, 0xfe, 0xff, 0xff, 0xff, 0xff,
650 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc7} },
651/* 10 */
652 {ARRAY_SIZE(write_iarr), 0x8a, 0, F_D_OUT | FF_MEDIA_IO,
653 resp_write_dt0, write_iarr, /* WRITE(16) */
654 {16, 0xfa, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
655 0xff, 0xff, 0xff, 0xff, 0xff, 0xc7} },
656 {0, 0x1b, 0, F_SSU_DELAY, resp_start_stop, NULL,/* START STOP UNIT */
657 {6, 0x1, 0, 0xf, 0xf7, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
658 {ARRAY_SIZE(sa_in_16_iarr), 0x9e, 0x10, F_SA_LOW | F_D_IN,
659 resp_readcap16, sa_in_16_iarr, /* SA_IN(16), READ CAPACITY(16) */
660 {16, 0x10, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
661 0xff, 0xff, 0xff, 0xff, 0x1, 0xc7} },
662 {0, 0x9f, 0x12, F_SA_LOW | F_D_OUT | FF_MEDIA_IO, resp_write_scat,
663 NULL, {16, 0x12, 0xf9, 0x0, 0xff, 0xff, 0, 0, 0xff, 0xff, 0xff,
664 0xff, 0xff, 0xff, 0xff, 0xc7} }, /* SA_OUT(16), WRITE SCAT(16) */
665 {ARRAY_SIZE(maint_in_iarr), 0xa3, 0xa, F_SA_LOW | F_D_IN,
666 resp_report_tgtpgs, /* MAINT IN, REPORT TARGET PORT GROUPS */
667 maint_in_iarr, {12, 0xea, 0, 0, 0, 0, 0xff, 0xff, 0xff,
668 0xff, 0, 0xc7, 0, 0, 0, 0} },
669/* 15 */
670 {0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL, /* MAINT OUT */
671 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
672 {ARRAY_SIZE(verify_iarr), 0x8f, 0,
673 F_D_OUT_MAYBE | FF_MEDIA_IO, resp_verify, /* VERIFY(16) */
674 verify_iarr, {16, 0xf6, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
675 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xc7} },
676 {ARRAY_SIZE(vl_iarr), 0x7f, 0x9, F_SA_HIGH | F_D_IN | FF_MEDIA_IO,
677 resp_read_dt0, vl_iarr, /* VARIABLE LENGTH, READ(32) */
678 {32, 0xc7, 0, 0, 0, 0, 0x3f, 0x18, 0x0, 0x9, 0xfe, 0, 0xff, 0xff,
679 0xff, 0xff} },
680 {ARRAY_SIZE(reserve_iarr), 0x56, 0, F_D_OUT,
681 NULL, reserve_iarr, /* RESERVE(10) <no response function> */
682 {10, 0xff, 0xff, 0xff, 0, 0, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0,
683 0} },
684 {ARRAY_SIZE(release_iarr), 0x57, 0, F_D_OUT,
685 NULL, release_iarr, /* RELEASE(10) <no response function> */
686 {10, 0x13, 0xff, 0xff, 0, 0, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0,
687 0} },
688/* 20 */
689 {0, 0x1e, 0, 0, NULL, NULL, /* ALLOW REMOVAL */
690 {6, 0, 0, 0, 0x3, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
691 {0, 0x1, 0, 0, resp_start_stop, NULL, /* REWIND ?? */
692 {6, 0x1, 0, 0, 0, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
693 {0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL, /* ATA_PT */
694 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
695 {0, 0x1d, F_D_OUT, 0, NULL, NULL, /* SEND DIAGNOSTIC */
696 {6, 0xf7, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
697 {0, 0x42, 0, F_D_OUT | FF_MEDIA_IO, resp_unmap, NULL, /* UNMAP */
698 {10, 0x1, 0, 0, 0, 0, 0x3f, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0} },
699/* 25 */
700 {0, 0x3b, 0, F_D_OUT_MAYBE, resp_write_buffer, NULL,
701 {10, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0,
702 0, 0, 0, 0} }, /* WRITE_BUFFER */
703 {ARRAY_SIZE(write_same_iarr), 0x41, 0, F_D_OUT_MAYBE | FF_MEDIA_IO,
704 resp_write_same_10, write_same_iarr, /* WRITE SAME(10) */
705 {10, 0xff, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xff, 0xff, 0xc7, 0,
706 0, 0, 0, 0, 0} },
707 {ARRAY_SIZE(sync_cache_iarr), 0x35, 0, F_SYNC_DELAY | F_M_ACCESS,
708 resp_sync_cache, sync_cache_iarr,
709 {10, 0x7, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xff, 0xff, 0xc7, 0, 0,
710 0, 0, 0, 0} }, /* SYNC_CACHE (10) */
711 {0, 0x89, 0, F_D_OUT | FF_MEDIA_IO, resp_comp_write, NULL,
712 {16, 0xf8, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0, 0,
713 0, 0xff, 0x3f, 0xc7} }, /* COMPARE AND WRITE */
714 {ARRAY_SIZE(pre_fetch_iarr), 0x34, 0, F_SYNC_DELAY | FF_MEDIA_IO,
715 resp_pre_fetch, pre_fetch_iarr,
716 {10, 0x2, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xff, 0xff, 0xc7, 0, 0,
717 0, 0, 0, 0} }, /* PRE-FETCH (10) */
718
719/* 30 */
720 {ARRAY_SIZE(zone_out_iarr), 0x94, 0x3, F_SA_LOW | F_M_ACCESS,
721 resp_open_zone, zone_out_iarr, /* ZONE_OUT(16), OPEN ZONE) */
722 {16, 0x3 /* SA */, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
723 0xff, 0xff, 0x0, 0x0, 0xff, 0xff, 0x1, 0xc7} },
724 {ARRAY_SIZE(zone_in_iarr), 0x95, 0x0, F_SA_LOW | F_M_ACCESS,
725 resp_report_zones, zone_in_iarr, /* ZONE_IN(16), REPORT ZONES) */
726 {16, 0x0 /* SA */, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
727 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xbf, 0xc7} },
728/* sentinel */
729 {0xff, 0, 0, 0, NULL, NULL, /* terminating element */
730 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
731};
732
733static int sdebug_num_hosts;
734static int sdebug_add_host = DEF_NUM_HOST; /* in sysfs this is relative */
735static int sdebug_ato = DEF_ATO;
736static int sdebug_cdb_len = DEF_CDB_LEN;
737static int sdebug_jdelay = DEF_JDELAY; /* if > 0 then unit is jiffies */
738static int sdebug_dev_size_mb = DEF_DEV_SIZE_PRE_INIT;
739static int sdebug_dif = DEF_DIF;
740static int sdebug_dix = DEF_DIX;
741static int sdebug_dsense = DEF_D_SENSE;
742static int sdebug_every_nth = DEF_EVERY_NTH;
743static int sdebug_fake_rw = DEF_FAKE_RW;
744static unsigned int sdebug_guard = DEF_GUARD;
745static int sdebug_host_max_queue; /* per host */
746static int sdebug_lowest_aligned = DEF_LOWEST_ALIGNED;
747static int sdebug_max_luns = DEF_MAX_LUNS;
748static int sdebug_max_queue = SDEBUG_CANQUEUE; /* per submit queue */
749static unsigned int sdebug_medium_error_start = OPT_MEDIUM_ERR_ADDR;
750static int sdebug_medium_error_count = OPT_MEDIUM_ERR_NUM;
751static atomic_t retired_max_queue; /* if > 0 then was prior max_queue */
752static int sdebug_ndelay = DEF_NDELAY; /* if > 0 then unit is nanoseconds */
753static int sdebug_no_lun_0 = DEF_NO_LUN_0;
754static int sdebug_no_uld;
755static int sdebug_num_parts = DEF_NUM_PARTS;
756static int sdebug_num_tgts = DEF_NUM_TGTS; /* targets per host */
757static int sdebug_opt_blks = DEF_OPT_BLKS;
758static int sdebug_opts = DEF_OPTS;
759static int sdebug_physblk_exp = DEF_PHYSBLK_EXP;
760static int sdebug_opt_xferlen_exp = DEF_OPT_XFERLEN_EXP;
761static int sdebug_ptype = DEF_PTYPE; /* SCSI peripheral device type */
762static int sdebug_scsi_level = DEF_SCSI_LEVEL;
763static int sdebug_sector_size = DEF_SECTOR_SIZE;
764static int sdeb_tur_ms_to_ready = DEF_TUR_MS_TO_READY;
765static int sdebug_virtual_gb = DEF_VIRTUAL_GB;
766static int sdebug_vpd_use_hostno = DEF_VPD_USE_HOSTNO;
767static unsigned int sdebug_lbpu = DEF_LBPU;
768static unsigned int sdebug_lbpws = DEF_LBPWS;
769static unsigned int sdebug_lbpws10 = DEF_LBPWS10;
770static unsigned int sdebug_lbprz = DEF_LBPRZ;
771static unsigned int sdebug_unmap_alignment = DEF_UNMAP_ALIGNMENT;
772static unsigned int sdebug_unmap_granularity = DEF_UNMAP_GRANULARITY;
773static unsigned int sdebug_unmap_max_blocks = DEF_UNMAP_MAX_BLOCKS;
774static unsigned int sdebug_unmap_max_desc = DEF_UNMAP_MAX_DESC;
775static unsigned int sdebug_write_same_length = DEF_WRITESAME_LENGTH;
776static int sdebug_uuid_ctl = DEF_UUID_CTL;
777static bool sdebug_random = DEF_RANDOM;
778static bool sdebug_per_host_store = DEF_PER_HOST_STORE;
779static bool sdebug_removable = DEF_REMOVABLE;
780static bool sdebug_clustering;
781static bool sdebug_host_lock = DEF_HOST_LOCK;
782static bool sdebug_strict = DEF_STRICT;
783static bool sdebug_any_injecting_opt;
784static bool sdebug_verbose;
785static bool have_dif_prot;
786static bool write_since_sync;
787static bool sdebug_statistics = DEF_STATISTICS;
788static bool sdebug_wp;
789/* Following enum: 0: no zbc, def; 1: host aware; 2: host managed */
790static enum blk_zoned_model sdeb_zbc_model = BLK_ZONED_NONE;
791static char *sdeb_zbc_model_s;
792
793enum sam_lun_addr_method {SAM_LUN_AM_PERIPHERAL = 0x0,
794 SAM_LUN_AM_FLAT = 0x1,
795 SAM_LUN_AM_LOGICAL_UNIT = 0x2,
796 SAM_LUN_AM_EXTENDED = 0x3};
797static enum sam_lun_addr_method sdebug_lun_am = SAM_LUN_AM_PERIPHERAL;
798static int sdebug_lun_am_i = (int)SAM_LUN_AM_PERIPHERAL;
799
800static unsigned int sdebug_store_sectors;
801static sector_t sdebug_capacity; /* in sectors */
802
803/* old BIOS stuff, kernel may get rid of them but some mode sense pages
804 may still need them */
805static int sdebug_heads; /* heads per disk */
806static int sdebug_cylinders_per; /* cylinders per surface */
807static int sdebug_sectors_per; /* sectors per cylinder */
808
809static LIST_HEAD(sdebug_host_list);
810static DEFINE_SPINLOCK(sdebug_host_list_lock);
811
812static struct xarray per_store_arr;
813static struct xarray *per_store_ap = &per_store_arr;
814static int sdeb_first_idx = -1; /* invalid index ==> none created */
815static int sdeb_most_recent_idx = -1;
816static DEFINE_RWLOCK(sdeb_fake_rw_lck); /* need a RW lock when fake_rw=1 */
817
818static unsigned long map_size;
819static int num_aborts;
820static int num_dev_resets;
821static int num_target_resets;
822static int num_bus_resets;
823static int num_host_resets;
824static int dix_writes;
825static int dix_reads;
826static int dif_errors;
827
828/* ZBC global data */
829static bool sdeb_zbc_in_use; /* true for host-aware and host-managed disks */
830static int sdeb_zbc_zone_size_mb;
831static int sdeb_zbc_max_open = DEF_ZBC_MAX_OPEN_ZONES;
832static int sdeb_zbc_nr_conv = DEF_ZBC_NR_CONV_ZONES;
833
834static int submit_queues = DEF_SUBMIT_QUEUES; /* > 1 for multi-queue (mq) */
835static int poll_queues; /* iouring iopoll interface.*/
836static struct sdebug_queue *sdebug_q_arr; /* ptr to array of submit queues */
837
838static DEFINE_RWLOCK(atomic_rw);
839static DEFINE_RWLOCK(atomic_rw2);
840
841static rwlock_t *ramdisk_lck_a[2];
842
843static char sdebug_proc_name[] = MY_NAME;
844static const char *my_name = MY_NAME;
845
846static struct bus_type pseudo_lld_bus;
847
848static struct device_driver sdebug_driverfs_driver = {
849 .name = sdebug_proc_name,
850 .bus = &pseudo_lld_bus,
851};
852
853static const int check_condition_result =
854 SAM_STAT_CHECK_CONDITION;
855
856static const int illegal_condition_result =
857 (DID_ABORT << 16) | SAM_STAT_CHECK_CONDITION;
858
859static const int device_qfull_result =
860 (DID_OK << 16) | SAM_STAT_TASK_SET_FULL;
861
862static const int condition_met_result = SAM_STAT_CONDITION_MET;
863
864
865/* Only do the extra work involved in logical block provisioning if one or
866 * more of the lbpu, lbpws or lbpws10 parameters are given and we are doing
867 * real reads and writes (i.e. not skipping them for speed).
868 */
869static inline bool scsi_debug_lbp(void)
870{
871 return 0 == sdebug_fake_rw &&
872 (sdebug_lbpu || sdebug_lbpws || sdebug_lbpws10);
873}
874
875static void *lba2fake_store(struct sdeb_store_info *sip,
876 unsigned long long lba)
877{
878 struct sdeb_store_info *lsip = sip;
879
880 lba = do_div(lba, sdebug_store_sectors);
881 if (!sip || !sip->storep) {
882 WARN_ON_ONCE(true);
883 lsip = xa_load(per_store_ap, 0); /* should never be NULL */
884 }
885 return lsip->storep + lba * sdebug_sector_size;
886}
887
888static struct t10_pi_tuple *dif_store(struct sdeb_store_info *sip,
889 sector_t sector)
890{
891 sector = sector_div(sector, sdebug_store_sectors);
892
893 return sip->dif_storep + sector;
894}
895
896static void sdebug_max_tgts_luns(void)
897{
898 struct sdebug_host_info *sdbg_host;
899 struct Scsi_Host *hpnt;
900
901 spin_lock(&sdebug_host_list_lock);
902 list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) {
903 hpnt = sdbg_host->shost;
904 if ((hpnt->this_id >= 0) &&
905 (sdebug_num_tgts > hpnt->this_id))
906 hpnt->max_id = sdebug_num_tgts + 1;
907 else
908 hpnt->max_id = sdebug_num_tgts;
909 /* sdebug_max_luns; */
910 hpnt->max_lun = SCSI_W_LUN_REPORT_LUNS + 1;
911 }
912 spin_unlock(&sdebug_host_list_lock);
913}
914
915enum sdeb_cmd_data {SDEB_IN_DATA = 0, SDEB_IN_CDB = 1};
916
917/* Set in_bit to -1 to indicate no bit position of invalid field */
918static void mk_sense_invalid_fld(struct scsi_cmnd *scp,
919 enum sdeb_cmd_data c_d,
920 int in_byte, int in_bit)
921{
922 unsigned char *sbuff;
923 u8 sks[4];
924 int sl, asc;
925
926 sbuff = scp->sense_buffer;
927 if (!sbuff) {
928 sdev_printk(KERN_ERR, scp->device,
929 "%s: sense_buffer is NULL\n", __func__);
930 return;
931 }
932 asc = c_d ? INVALID_FIELD_IN_CDB : INVALID_FIELD_IN_PARAM_LIST;
933 memset(sbuff, 0, SCSI_SENSE_BUFFERSIZE);
934 scsi_build_sense(scp, sdebug_dsense, ILLEGAL_REQUEST, asc, 0);
935 memset(sks, 0, sizeof(sks));
936 sks[0] = 0x80;
937 if (c_d)
938 sks[0] |= 0x40;
939 if (in_bit >= 0) {
940 sks[0] |= 0x8;
941 sks[0] |= 0x7 & in_bit;
942 }
943 put_unaligned_be16(in_byte, sks + 1);
944 if (sdebug_dsense) {
945 sl = sbuff[7] + 8;
946 sbuff[7] = sl;
947 sbuff[sl] = 0x2;
948 sbuff[sl + 1] = 0x6;
949 memcpy(sbuff + sl + 4, sks, 3);
950 } else
951 memcpy(sbuff + 15, sks, 3);
952 if (sdebug_verbose)
953 sdev_printk(KERN_INFO, scp->device, "%s: [sense_key,asc,ascq"
954 "]: [0x5,0x%x,0x0] %c byte=%d, bit=%d\n",
955 my_name, asc, c_d ? 'C' : 'D', in_byte, in_bit);
956}
957
958static void mk_sense_buffer(struct scsi_cmnd *scp, int key, int asc, int asq)
959{
960 if (!scp->sense_buffer) {
961 sdev_printk(KERN_ERR, scp->device,
962 "%s: sense_buffer is NULL\n", __func__);
963 return;
964 }
965 memset(scp->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
966
967 scsi_build_sense(scp, sdebug_dsense, key, asc, asq);
968
969 if (sdebug_verbose)
970 sdev_printk(KERN_INFO, scp->device,
971 "%s: [sense_key,asc,ascq]: [0x%x,0x%x,0x%x]\n",
972 my_name, key, asc, asq);
973}
974
975static void mk_sense_invalid_opcode(struct scsi_cmnd *scp)
976{
977 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_OPCODE, 0);
978}
979
980static int scsi_debug_ioctl(struct scsi_device *dev, unsigned int cmd,
981 void __user *arg)
982{
983 if (sdebug_verbose) {
984 if (0x1261 == cmd)
985 sdev_printk(KERN_INFO, dev,
986 "%s: BLKFLSBUF [0x1261]\n", __func__);
987 else if (0x5331 == cmd)
988 sdev_printk(KERN_INFO, dev,
989 "%s: CDROM_GET_CAPABILITY [0x5331]\n",
990 __func__);
991 else
992 sdev_printk(KERN_INFO, dev, "%s: cmd=0x%x\n",
993 __func__, cmd);
994 }
995 return -EINVAL;
996 /* return -ENOTTY; // correct return but upsets fdisk */
997}
998
999static void config_cdb_len(struct scsi_device *sdev)
1000{
1001 switch (sdebug_cdb_len) {
1002 case 6: /* suggest 6 byte READ, WRITE and MODE SENSE/SELECT */
1003 sdev->use_10_for_rw = false;
1004 sdev->use_16_for_rw = false;
1005 sdev->use_10_for_ms = false;
1006 break;
1007 case 10: /* suggest 10 byte RWs and 6 byte MODE SENSE/SELECT */
1008 sdev->use_10_for_rw = true;
1009 sdev->use_16_for_rw = false;
1010 sdev->use_10_for_ms = false;
1011 break;
1012 case 12: /* suggest 10 byte RWs and 10 byte MODE SENSE/SELECT */
1013 sdev->use_10_for_rw = true;
1014 sdev->use_16_for_rw = false;
1015 sdev->use_10_for_ms = true;
1016 break;
1017 case 16:
1018 sdev->use_10_for_rw = false;
1019 sdev->use_16_for_rw = true;
1020 sdev->use_10_for_ms = true;
1021 break;
1022 case 32: /* No knobs to suggest this so same as 16 for now */
1023 sdev->use_10_for_rw = false;
1024 sdev->use_16_for_rw = true;
1025 sdev->use_10_for_ms = true;
1026 break;
1027 default:
1028 pr_warn("unexpected cdb_len=%d, force to 10\n",
1029 sdebug_cdb_len);
1030 sdev->use_10_for_rw = true;
1031 sdev->use_16_for_rw = false;
1032 sdev->use_10_for_ms = false;
1033 sdebug_cdb_len = 10;
1034 break;
1035 }
1036}
1037
1038static void all_config_cdb_len(void)
1039{
1040 struct sdebug_host_info *sdbg_host;
1041 struct Scsi_Host *shost;
1042 struct scsi_device *sdev;
1043
1044 spin_lock(&sdebug_host_list_lock);
1045 list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) {
1046 shost = sdbg_host->shost;
1047 shost_for_each_device(sdev, shost) {
1048 config_cdb_len(sdev);
1049 }
1050 }
1051 spin_unlock(&sdebug_host_list_lock);
1052}
1053
1054static void clear_luns_changed_on_target(struct sdebug_dev_info *devip)
1055{
1056 struct sdebug_host_info *sdhp;
1057 struct sdebug_dev_info *dp;
1058
1059 spin_lock(&sdebug_host_list_lock);
1060 list_for_each_entry(sdhp, &sdebug_host_list, host_list) {
1061 list_for_each_entry(dp, &sdhp->dev_info_list, dev_list) {
1062 if ((devip->sdbg_host == dp->sdbg_host) &&
1063 (devip->target == dp->target))
1064 clear_bit(SDEBUG_UA_LUNS_CHANGED, dp->uas_bm);
1065 }
1066 }
1067 spin_unlock(&sdebug_host_list_lock);
1068}
1069
1070static int make_ua(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
1071{
1072 int k;
1073
1074 k = find_first_bit(devip->uas_bm, SDEBUG_NUM_UAS);
1075 if (k != SDEBUG_NUM_UAS) {
1076 const char *cp = NULL;
1077
1078 switch (k) {
1079 case SDEBUG_UA_POR:
1080 mk_sense_buffer(scp, UNIT_ATTENTION, UA_RESET_ASC,
1081 POWER_ON_RESET_ASCQ);
1082 if (sdebug_verbose)
1083 cp = "power on reset";
1084 break;
1085 case SDEBUG_UA_BUS_RESET:
1086 mk_sense_buffer(scp, UNIT_ATTENTION, UA_RESET_ASC,
1087 BUS_RESET_ASCQ);
1088 if (sdebug_verbose)
1089 cp = "bus reset";
1090 break;
1091 case SDEBUG_UA_MODE_CHANGED:
1092 mk_sense_buffer(scp, UNIT_ATTENTION, UA_CHANGED_ASC,
1093 MODE_CHANGED_ASCQ);
1094 if (sdebug_verbose)
1095 cp = "mode parameters changed";
1096 break;
1097 case SDEBUG_UA_CAPACITY_CHANGED:
1098 mk_sense_buffer(scp, UNIT_ATTENTION, UA_CHANGED_ASC,
1099 CAPACITY_CHANGED_ASCQ);
1100 if (sdebug_verbose)
1101 cp = "capacity data changed";
1102 break;
1103 case SDEBUG_UA_MICROCODE_CHANGED:
1104 mk_sense_buffer(scp, UNIT_ATTENTION,
1105 TARGET_CHANGED_ASC,
1106 MICROCODE_CHANGED_ASCQ);
1107 if (sdebug_verbose)
1108 cp = "microcode has been changed";
1109 break;
1110 case SDEBUG_UA_MICROCODE_CHANGED_WO_RESET:
1111 mk_sense_buffer(scp, UNIT_ATTENTION,
1112 TARGET_CHANGED_ASC,
1113 MICROCODE_CHANGED_WO_RESET_ASCQ);
1114 if (sdebug_verbose)
1115 cp = "microcode has been changed without reset";
1116 break;
1117 case SDEBUG_UA_LUNS_CHANGED:
1118 /*
1119 * SPC-3 behavior is to report a UNIT ATTENTION with
1120 * ASC/ASCQ REPORTED LUNS DATA HAS CHANGED on every LUN
1121 * on the target, until a REPORT LUNS command is
1122 * received. SPC-4 behavior is to report it only once.
1123 * NOTE: sdebug_scsi_level does not use the same
1124 * values as struct scsi_device->scsi_level.
1125 */
1126 if (sdebug_scsi_level >= 6) /* SPC-4 and above */
1127 clear_luns_changed_on_target(devip);
1128 mk_sense_buffer(scp, UNIT_ATTENTION,
1129 TARGET_CHANGED_ASC,
1130 LUNS_CHANGED_ASCQ);
1131 if (sdebug_verbose)
1132 cp = "reported luns data has changed";
1133 break;
1134 default:
1135 pr_warn("unexpected unit attention code=%d\n", k);
1136 if (sdebug_verbose)
1137 cp = "unknown";
1138 break;
1139 }
1140 clear_bit(k, devip->uas_bm);
1141 if (sdebug_verbose)
1142 sdev_printk(KERN_INFO, scp->device,
1143 "%s reports: Unit attention: %s\n",
1144 my_name, cp);
1145 return check_condition_result;
1146 }
1147 return 0;
1148}
1149
1150/* Build SCSI "data-in" buffer. Returns 0 if ok else (DID_ERROR << 16). */
1151static int fill_from_dev_buffer(struct scsi_cmnd *scp, unsigned char *arr,
1152 int arr_len)
1153{
1154 int act_len;
1155 struct scsi_data_buffer *sdb = &scp->sdb;
1156
1157 if (!sdb->length)
1158 return 0;
1159 if (scp->sc_data_direction != DMA_FROM_DEVICE)
1160 return DID_ERROR << 16;
1161
1162 act_len = sg_copy_from_buffer(sdb->table.sgl, sdb->table.nents,
1163 arr, arr_len);
1164 scsi_set_resid(scp, scsi_bufflen(scp) - act_len);
1165
1166 return 0;
1167}
1168
1169/* Partial build of SCSI "data-in" buffer. Returns 0 if ok else
1170 * (DID_ERROR << 16). Can write to offset in data-in buffer. If multiple
1171 * calls, not required to write in ascending offset order. Assumes resid
1172 * set to scsi_bufflen() prior to any calls.
1173 */
1174static int p_fill_from_dev_buffer(struct scsi_cmnd *scp, const void *arr,
1175 int arr_len, unsigned int off_dst)
1176{
1177 unsigned int act_len, n;
1178 struct scsi_data_buffer *sdb = &scp->sdb;
1179 off_t skip = off_dst;
1180
1181 if (sdb->length <= off_dst)
1182 return 0;
1183 if (scp->sc_data_direction != DMA_FROM_DEVICE)
1184 return DID_ERROR << 16;
1185
1186 act_len = sg_pcopy_from_buffer(sdb->table.sgl, sdb->table.nents,
1187 arr, arr_len, skip);
1188 pr_debug("%s: off_dst=%u, scsi_bufflen=%u, act_len=%u, resid=%d\n",
1189 __func__, off_dst, scsi_bufflen(scp), act_len,
1190 scsi_get_resid(scp));
1191 n = scsi_bufflen(scp) - (off_dst + act_len);
1192 scsi_set_resid(scp, min_t(int, scsi_get_resid(scp), n));
1193 return 0;
1194}
1195
1196/* Fetches from SCSI "data-out" buffer. Returns number of bytes fetched into
1197 * 'arr' or -1 if error.
1198 */
1199static int fetch_to_dev_buffer(struct scsi_cmnd *scp, unsigned char *arr,
1200 int arr_len)
1201{
1202 if (!scsi_bufflen(scp))
1203 return 0;
1204 if (scp->sc_data_direction != DMA_TO_DEVICE)
1205 return -1;
1206
1207 return scsi_sg_copy_to_buffer(scp, arr, arr_len);
1208}
1209
1210
1211static char sdebug_inq_vendor_id[9] = "Linux ";
1212static char sdebug_inq_product_id[17] = "scsi_debug ";
1213static char sdebug_inq_product_rev[5] = SDEBUG_VERSION;
1214/* Use some locally assigned NAAs for SAS addresses. */
1215static const u64 naa3_comp_a = 0x3222222000000000ULL;
1216static const u64 naa3_comp_b = 0x3333333000000000ULL;
1217static const u64 naa3_comp_c = 0x3111111000000000ULL;
1218
1219/* Device identification VPD page. Returns number of bytes placed in arr */
1220static int inquiry_vpd_83(unsigned char *arr, int port_group_id,
1221 int target_dev_id, int dev_id_num,
1222 const char *dev_id_str, int dev_id_str_len,
1223 const uuid_t *lu_name)
1224{
1225 int num, port_a;
1226 char b[32];
1227
1228 port_a = target_dev_id + 1;
1229 /* T10 vendor identifier field format (faked) */
1230 arr[0] = 0x2; /* ASCII */
1231 arr[1] = 0x1;
1232 arr[2] = 0x0;
1233 memcpy(&arr[4], sdebug_inq_vendor_id, 8);
1234 memcpy(&arr[12], sdebug_inq_product_id, 16);
1235 memcpy(&arr[28], dev_id_str, dev_id_str_len);
1236 num = 8 + 16 + dev_id_str_len;
1237 arr[3] = num;
1238 num += 4;
1239 if (dev_id_num >= 0) {
1240 if (sdebug_uuid_ctl) {
1241 /* Locally assigned UUID */
1242 arr[num++] = 0x1; /* binary (not necessarily sas) */
1243 arr[num++] = 0xa; /* PIV=0, lu, naa */
1244 arr[num++] = 0x0;
1245 arr[num++] = 0x12;
1246 arr[num++] = 0x10; /* uuid type=1, locally assigned */
1247 arr[num++] = 0x0;
1248 memcpy(arr + num, lu_name, 16);
1249 num += 16;
1250 } else {
1251 /* NAA-3, Logical unit identifier (binary) */
1252 arr[num++] = 0x1; /* binary (not necessarily sas) */
1253 arr[num++] = 0x3; /* PIV=0, lu, naa */
1254 arr[num++] = 0x0;
1255 arr[num++] = 0x8;
1256 put_unaligned_be64(naa3_comp_b + dev_id_num, arr + num);
1257 num += 8;
1258 }
1259 /* Target relative port number */
1260 arr[num++] = 0x61; /* proto=sas, binary */
1261 arr[num++] = 0x94; /* PIV=1, target port, rel port */
1262 arr[num++] = 0x0; /* reserved */
1263 arr[num++] = 0x4; /* length */
1264 arr[num++] = 0x0; /* reserved */
1265 arr[num++] = 0x0; /* reserved */
1266 arr[num++] = 0x0;
1267 arr[num++] = 0x1; /* relative port A */
1268 }
1269 /* NAA-3, Target port identifier */
1270 arr[num++] = 0x61; /* proto=sas, binary */
1271 arr[num++] = 0x93; /* piv=1, target port, naa */
1272 arr[num++] = 0x0;
1273 arr[num++] = 0x8;
1274 put_unaligned_be64(naa3_comp_a + port_a, arr + num);
1275 num += 8;
1276 /* NAA-3, Target port group identifier */
1277 arr[num++] = 0x61; /* proto=sas, binary */
1278 arr[num++] = 0x95; /* piv=1, target port group id */
1279 arr[num++] = 0x0;
1280 arr[num++] = 0x4;
1281 arr[num++] = 0;
1282 arr[num++] = 0;
1283 put_unaligned_be16(port_group_id, arr + num);
1284 num += 2;
1285 /* NAA-3, Target device identifier */
1286 arr[num++] = 0x61; /* proto=sas, binary */
1287 arr[num++] = 0xa3; /* piv=1, target device, naa */
1288 arr[num++] = 0x0;
1289 arr[num++] = 0x8;
1290 put_unaligned_be64(naa3_comp_a + target_dev_id, arr + num);
1291 num += 8;
1292 /* SCSI name string: Target device identifier */
1293 arr[num++] = 0x63; /* proto=sas, UTF-8 */
1294 arr[num++] = 0xa8; /* piv=1, target device, SCSI name string */
1295 arr[num++] = 0x0;
1296 arr[num++] = 24;
1297 memcpy(arr + num, "naa.32222220", 12);
1298 num += 12;
1299 snprintf(b, sizeof(b), "%08X", target_dev_id);
1300 memcpy(arr + num, b, 8);
1301 num += 8;
1302 memset(arr + num, 0, 4);
1303 num += 4;
1304 return num;
1305}
1306
1307static unsigned char vpd84_data[] = {
1308/* from 4th byte */ 0x22,0x22,0x22,0x0,0xbb,0x0,
1309 0x22,0x22,0x22,0x0,0xbb,0x1,
1310 0x22,0x22,0x22,0x0,0xbb,0x2,
1311};
1312
1313/* Software interface identification VPD page */
1314static int inquiry_vpd_84(unsigned char *arr)
1315{
1316 memcpy(arr, vpd84_data, sizeof(vpd84_data));
1317 return sizeof(vpd84_data);
1318}
1319
1320/* Management network addresses VPD page */
1321static int inquiry_vpd_85(unsigned char *arr)
1322{
1323 int num = 0;
1324 const char *na1 = "https://www.kernel.org/config";
1325 const char *na2 = "http://www.kernel.org/log";
1326 int plen, olen;
1327
1328 arr[num++] = 0x1; /* lu, storage config */
1329 arr[num++] = 0x0; /* reserved */
1330 arr[num++] = 0x0;
1331 olen = strlen(na1);
1332 plen = olen + 1;
1333 if (plen % 4)
1334 plen = ((plen / 4) + 1) * 4;
1335 arr[num++] = plen; /* length, null termianted, padded */
1336 memcpy(arr + num, na1, olen);
1337 memset(arr + num + olen, 0, plen - olen);
1338 num += plen;
1339
1340 arr[num++] = 0x4; /* lu, logging */
1341 arr[num++] = 0x0; /* reserved */
1342 arr[num++] = 0x0;
1343 olen = strlen(na2);
1344 plen = olen + 1;
1345 if (plen % 4)
1346 plen = ((plen / 4) + 1) * 4;
1347 arr[num++] = plen; /* length, null terminated, padded */
1348 memcpy(arr + num, na2, olen);
1349 memset(arr + num + olen, 0, plen - olen);
1350 num += plen;
1351
1352 return num;
1353}
1354
1355/* SCSI ports VPD page */
1356static int inquiry_vpd_88(unsigned char *arr, int target_dev_id)
1357{
1358 int num = 0;
1359 int port_a, port_b;
1360
1361 port_a = target_dev_id + 1;
1362 port_b = port_a + 1;
1363 arr[num++] = 0x0; /* reserved */
1364 arr[num++] = 0x0; /* reserved */
1365 arr[num++] = 0x0;
1366 arr[num++] = 0x1; /* relative port 1 (primary) */
1367 memset(arr + num, 0, 6);
1368 num += 6;
1369 arr[num++] = 0x0;
1370 arr[num++] = 12; /* length tp descriptor */
1371 /* naa-5 target port identifier (A) */
1372 arr[num++] = 0x61; /* proto=sas, binary */
1373 arr[num++] = 0x93; /* PIV=1, target port, NAA */
1374 arr[num++] = 0x0; /* reserved */
1375 arr[num++] = 0x8; /* length */
1376 put_unaligned_be64(naa3_comp_a + port_a, arr + num);
1377 num += 8;
1378 arr[num++] = 0x0; /* reserved */
1379 arr[num++] = 0x0; /* reserved */
1380 arr[num++] = 0x0;
1381 arr[num++] = 0x2; /* relative port 2 (secondary) */
1382 memset(arr + num, 0, 6);
1383 num += 6;
1384 arr[num++] = 0x0;
1385 arr[num++] = 12; /* length tp descriptor */
1386 /* naa-5 target port identifier (B) */
1387 arr[num++] = 0x61; /* proto=sas, binary */
1388 arr[num++] = 0x93; /* PIV=1, target port, NAA */
1389 arr[num++] = 0x0; /* reserved */
1390 arr[num++] = 0x8; /* length */
1391 put_unaligned_be64(naa3_comp_a + port_b, arr + num);
1392 num += 8;
1393
1394 return num;
1395}
1396
1397
1398static unsigned char vpd89_data[] = {
1399/* from 4th byte */ 0,0,0,0,
1400'l','i','n','u','x',' ',' ',' ',
1401'S','A','T',' ','s','c','s','i','_','d','e','b','u','g',' ',' ',
1402'1','2','3','4',
14030x34,0,0,0,1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,
14040xec,0,0,0,
14050x5a,0xc,0xff,0x3f,0x37,0xc8,0x10,0,0,0,0,0,0x3f,0,0,0,
14060,0,0,0,0x58,0x58,0x58,0x58,0x58,0x58,0x58,0x58,0x20,0x20,0x20,0x20,
14070x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0,0,0,0x40,0x4,0,0x2e,0x33,
14080x38,0x31,0x20,0x20,0x20,0x20,0x54,0x53,0x38,0x33,0x30,0x30,0x33,0x31,
14090x53,0x41,
14100x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,
14110x20,0x20,
14120x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,
14130x10,0x80,
14140,0,0,0x2f,0,0,0,0x2,0,0x2,0x7,0,0xff,0xff,0x1,0,
14150x3f,0,0xc1,0xff,0x3e,0,0x10,0x1,0xb0,0xf8,0x50,0x9,0,0,0x7,0,
14160x3,0,0x78,0,0x78,0,0xf0,0,0x78,0,0,0,0,0,0,0,
14170,0,0,0,0,0,0,0,0x2,0,0,0,0,0,0,0,
14180x7e,0,0x1b,0,0x6b,0x34,0x1,0x7d,0x3,0x40,0x69,0x34,0x1,0x3c,0x3,0x40,
14190x7f,0x40,0,0,0,0,0xfe,0xfe,0,0,0,0,0,0xfe,0,0,
14200,0,0,0,0,0,0,0,0xb0,0xf8,0x50,0x9,0,0,0,0,
14210,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
14220,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
14230,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
14240x1,0,0xb0,0xf8,0x50,0x9,0xb0,0xf8,0x50,0x9,0x20,0x20,0x2,0,0xb6,0x42,
14250,0x80,0x8a,0,0x6,0x3c,0xa,0x3c,0xff,0xff,0xc6,0x7,0,0x1,0,0x8,
14260xf0,0xf,0,0x10,0x2,0,0x30,0,0,0,0,0,0,0,0x6,0xfe,
14270,0,0x2,0,0x50,0,0x8a,0,0x4f,0x95,0,0,0x21,0,0xb,0,
14280,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
14290,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
14300,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
14310,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
14320,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
14330,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
14340,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
14350,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
14360,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
14370,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
14380,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
14390,0,0,0,0,0,0,0,0,0,0,0,0,0,0xa5,0x51,
1440};
1441
1442/* ATA Information VPD page */
1443static int inquiry_vpd_89(unsigned char *arr)
1444{
1445 memcpy(arr, vpd89_data, sizeof(vpd89_data));
1446 return sizeof(vpd89_data);
1447}
1448
1449
1450static unsigned char vpdb0_data[] = {
1451 /* from 4th byte */ 0,0,0,4, 0,0,0x4,0, 0,0,0,64,
1452 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1453 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1454 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1455};
1456
1457/* Block limits VPD page (SBC-3) */
1458static int inquiry_vpd_b0(unsigned char *arr)
1459{
1460 unsigned int gran;
1461
1462 memcpy(arr, vpdb0_data, sizeof(vpdb0_data));
1463
1464 /* Optimal transfer length granularity */
1465 if (sdebug_opt_xferlen_exp != 0 &&
1466 sdebug_physblk_exp < sdebug_opt_xferlen_exp)
1467 gran = 1 << sdebug_opt_xferlen_exp;
1468 else
1469 gran = 1 << sdebug_physblk_exp;
1470 put_unaligned_be16(gran, arr + 2);
1471
1472 /* Maximum Transfer Length */
1473 if (sdebug_store_sectors > 0x400)
1474 put_unaligned_be32(sdebug_store_sectors, arr + 4);
1475
1476 /* Optimal Transfer Length */
1477 put_unaligned_be32(sdebug_opt_blks, &arr[8]);
1478
1479 if (sdebug_lbpu) {
1480 /* Maximum Unmap LBA Count */
1481 put_unaligned_be32(sdebug_unmap_max_blocks, &arr[16]);
1482
1483 /* Maximum Unmap Block Descriptor Count */
1484 put_unaligned_be32(sdebug_unmap_max_desc, &arr[20]);
1485 }
1486
1487 /* Unmap Granularity Alignment */
1488 if (sdebug_unmap_alignment) {
1489 put_unaligned_be32(sdebug_unmap_alignment, &arr[28]);
1490 arr[28] |= 0x80; /* UGAVALID */
1491 }
1492
1493 /* Optimal Unmap Granularity */
1494 put_unaligned_be32(sdebug_unmap_granularity, &arr[24]);
1495
1496 /* Maximum WRITE SAME Length */
1497 put_unaligned_be64(sdebug_write_same_length, &arr[32]);
1498
1499 return 0x3c; /* Mandatory page length for Logical Block Provisioning */
1500
1501 return sizeof(vpdb0_data);
1502}
1503
1504/* Block device characteristics VPD page (SBC-3) */
1505static int inquiry_vpd_b1(struct sdebug_dev_info *devip, unsigned char *arr)
1506{
1507 memset(arr, 0, 0x3c);
1508 arr[0] = 0;
1509 arr[1] = 1; /* non rotating medium (e.g. solid state) */
1510 arr[2] = 0;
1511 arr[3] = 5; /* less than 1.8" */
1512 if (devip->zmodel == BLK_ZONED_HA)
1513 arr[4] = 1 << 4; /* zoned field = 01b */
1514
1515 return 0x3c;
1516}
1517
1518/* Logical block provisioning VPD page (SBC-4) */
1519static int inquiry_vpd_b2(unsigned char *arr)
1520{
1521 memset(arr, 0, 0x4);
1522 arr[0] = 0; /* threshold exponent */
1523 if (sdebug_lbpu)
1524 arr[1] = 1 << 7;
1525 if (sdebug_lbpws)
1526 arr[1] |= 1 << 6;
1527 if (sdebug_lbpws10)
1528 arr[1] |= 1 << 5;
1529 if (sdebug_lbprz && scsi_debug_lbp())
1530 arr[1] |= (sdebug_lbprz & 0x7) << 2; /* sbc4r07 and later */
1531 /* anc_sup=0; dp=0 (no provisioning group descriptor) */
1532 /* minimum_percentage=0; provisioning_type=0 (unknown) */
1533 /* threshold_percentage=0 */
1534 return 0x4;
1535}
1536
1537/* Zoned block device characteristics VPD page (ZBC mandatory) */
1538static int inquiry_vpd_b6(struct sdebug_dev_info *devip, unsigned char *arr)
1539{
1540 memset(arr, 0, 0x3c);
1541 arr[0] = 0x1; /* set URSWRZ (unrestricted read in seq. wr req zone) */
1542 /*
1543 * Set Optimal number of open sequential write preferred zones and
1544 * Optimal number of non-sequentially written sequential write
1545 * preferred zones fields to 'not reported' (0xffffffff). Leave other
1546 * fields set to zero, apart from Max. number of open swrz_s field.
1547 */
1548 put_unaligned_be32(0xffffffff, &arr[4]);
1549 put_unaligned_be32(0xffffffff, &arr[8]);
1550 if (sdeb_zbc_model == BLK_ZONED_HM && devip->max_open)
1551 put_unaligned_be32(devip->max_open, &arr[12]);
1552 else
1553 put_unaligned_be32(0xffffffff, &arr[12]);
1554 return 0x3c;
1555}
1556
1557#define SDEBUG_LONG_INQ_SZ 96
1558#define SDEBUG_MAX_INQ_ARR_SZ 584
1559
1560static int resp_inquiry(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
1561{
1562 unsigned char pq_pdt;
1563 unsigned char *arr;
1564 unsigned char *cmd = scp->cmnd;
1565 int alloc_len, n, ret;
1566 bool have_wlun, is_disk, is_zbc, is_disk_zbc;
1567
1568 alloc_len = get_unaligned_be16(cmd + 3);
1569 arr = kzalloc(SDEBUG_MAX_INQ_ARR_SZ, GFP_ATOMIC);
1570 if (! arr)
1571 return DID_REQUEUE << 16;
1572 is_disk = (sdebug_ptype == TYPE_DISK);
1573 is_zbc = (devip->zmodel != BLK_ZONED_NONE);
1574 is_disk_zbc = (is_disk || is_zbc);
1575 have_wlun = scsi_is_wlun(scp->device->lun);
1576 if (have_wlun)
1577 pq_pdt = TYPE_WLUN; /* present, wlun */
1578 else if (sdebug_no_lun_0 && (devip->lun == SDEBUG_LUN_0_VAL))
1579 pq_pdt = 0x7f; /* not present, PQ=3, PDT=0x1f */
1580 else
1581 pq_pdt = (sdebug_ptype & 0x1f);
1582 arr[0] = pq_pdt;
1583 if (0x2 & cmd[1]) { /* CMDDT bit set */
1584 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 1);
1585 kfree(arr);
1586 return check_condition_result;
1587 } else if (0x1 & cmd[1]) { /* EVPD bit set */
1588 int lu_id_num, port_group_id, target_dev_id, len;
1589 char lu_id_str[6];
1590 int host_no = devip->sdbg_host->shost->host_no;
1591
1592 port_group_id = (((host_no + 1) & 0x7f) << 8) +
1593 (devip->channel & 0x7f);
1594 if (sdebug_vpd_use_hostno == 0)
1595 host_no = 0;
1596 lu_id_num = have_wlun ? -1 : (((host_no + 1) * 2000) +
1597 (devip->target * 1000) + devip->lun);
1598 target_dev_id = ((host_no + 1) * 2000) +
1599 (devip->target * 1000) - 3;
1600 len = scnprintf(lu_id_str, 6, "%d", lu_id_num);
1601 if (0 == cmd[2]) { /* supported vital product data pages */
1602 arr[1] = cmd[2]; /*sanity */
1603 n = 4;
1604 arr[n++] = 0x0; /* this page */
1605 arr[n++] = 0x80; /* unit serial number */
1606 arr[n++] = 0x83; /* device identification */
1607 arr[n++] = 0x84; /* software interface ident. */
1608 arr[n++] = 0x85; /* management network addresses */
1609 arr[n++] = 0x86; /* extended inquiry */
1610 arr[n++] = 0x87; /* mode page policy */
1611 arr[n++] = 0x88; /* SCSI ports */
1612 if (is_disk_zbc) { /* SBC or ZBC */
1613 arr[n++] = 0x89; /* ATA information */
1614 arr[n++] = 0xb0; /* Block limits */
1615 arr[n++] = 0xb1; /* Block characteristics */
1616 if (is_disk)
1617 arr[n++] = 0xb2; /* LB Provisioning */
1618 if (is_zbc)
1619 arr[n++] = 0xb6; /* ZB dev. char. */
1620 }
1621 arr[3] = n - 4; /* number of supported VPD pages */
1622 } else if (0x80 == cmd[2]) { /* unit serial number */
1623 arr[1] = cmd[2]; /*sanity */
1624 arr[3] = len;
1625 memcpy(&arr[4], lu_id_str, len);
1626 } else if (0x83 == cmd[2]) { /* device identification */
1627 arr[1] = cmd[2]; /*sanity */
1628 arr[3] = inquiry_vpd_83(&arr[4], port_group_id,
1629 target_dev_id, lu_id_num,
1630 lu_id_str, len,
1631 &devip->lu_name);
1632 } else if (0x84 == cmd[2]) { /* Software interface ident. */
1633 arr[1] = cmd[2]; /*sanity */
1634 arr[3] = inquiry_vpd_84(&arr[4]);
1635 } else if (0x85 == cmd[2]) { /* Management network addresses */
1636 arr[1] = cmd[2]; /*sanity */
1637 arr[3] = inquiry_vpd_85(&arr[4]);
1638 } else if (0x86 == cmd[2]) { /* extended inquiry */
1639 arr[1] = cmd[2]; /*sanity */
1640 arr[3] = 0x3c; /* number of following entries */
1641 if (sdebug_dif == T10_PI_TYPE3_PROTECTION)
1642 arr[4] = 0x4; /* SPT: GRD_CHK:1 */
1643 else if (have_dif_prot)
1644 arr[4] = 0x5; /* SPT: GRD_CHK:1, REF_CHK:1 */
1645 else
1646 arr[4] = 0x0; /* no protection stuff */
1647 arr[5] = 0x7; /* head of q, ordered + simple q's */
1648 } else if (0x87 == cmd[2]) { /* mode page policy */
1649 arr[1] = cmd[2]; /*sanity */
1650 arr[3] = 0x8; /* number of following entries */
1651 arr[4] = 0x2; /* disconnect-reconnect mp */
1652 arr[6] = 0x80; /* mlus, shared */
1653 arr[8] = 0x18; /* protocol specific lu */
1654 arr[10] = 0x82; /* mlus, per initiator port */
1655 } else if (0x88 == cmd[2]) { /* SCSI Ports */
1656 arr[1] = cmd[2]; /*sanity */
1657 arr[3] = inquiry_vpd_88(&arr[4], target_dev_id);
1658 } else if (is_disk_zbc && 0x89 == cmd[2]) { /* ATA info */
1659 arr[1] = cmd[2]; /*sanity */
1660 n = inquiry_vpd_89(&arr[4]);
1661 put_unaligned_be16(n, arr + 2);
1662 } else if (is_disk_zbc && 0xb0 == cmd[2]) { /* Block limits */
1663 arr[1] = cmd[2]; /*sanity */
1664 arr[3] = inquiry_vpd_b0(&arr[4]);
1665 } else if (is_disk_zbc && 0xb1 == cmd[2]) { /* Block char. */
1666 arr[1] = cmd[2]; /*sanity */
1667 arr[3] = inquiry_vpd_b1(devip, &arr[4]);
1668 } else if (is_disk && 0xb2 == cmd[2]) { /* LB Prov. */
1669 arr[1] = cmd[2]; /*sanity */
1670 arr[3] = inquiry_vpd_b2(&arr[4]);
1671 } else if (is_zbc && cmd[2] == 0xb6) { /* ZB dev. charact. */
1672 arr[1] = cmd[2]; /*sanity */
1673 arr[3] = inquiry_vpd_b6(devip, &arr[4]);
1674 } else {
1675 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, -1);
1676 kfree(arr);
1677 return check_condition_result;
1678 }
1679 len = min(get_unaligned_be16(arr + 2) + 4, alloc_len);
1680 ret = fill_from_dev_buffer(scp, arr,
1681 min(len, SDEBUG_MAX_INQ_ARR_SZ));
1682 kfree(arr);
1683 return ret;
1684 }
1685 /* drops through here for a standard inquiry */
1686 arr[1] = sdebug_removable ? 0x80 : 0; /* Removable disk */
1687 arr[2] = sdebug_scsi_level;
1688 arr[3] = 2; /* response_data_format==2 */
1689 arr[4] = SDEBUG_LONG_INQ_SZ - 5;
1690 arr[5] = (int)have_dif_prot; /* PROTECT bit */
1691 if (sdebug_vpd_use_hostno == 0)
1692 arr[5] |= 0x10; /* claim: implicit TPGS */
1693 arr[6] = 0x10; /* claim: MultiP */
1694 /* arr[6] |= 0x40; ... claim: EncServ (enclosure services) */
1695 arr[7] = 0xa; /* claim: LINKED + CMDQUE */
1696 memcpy(&arr[8], sdebug_inq_vendor_id, 8);
1697 memcpy(&arr[16], sdebug_inq_product_id, 16);
1698 memcpy(&arr[32], sdebug_inq_product_rev, 4);
1699 /* Use Vendor Specific area to place driver date in ASCII hex */
1700 memcpy(&arr[36], sdebug_version_date, 8);
1701 /* version descriptors (2 bytes each) follow */
1702 put_unaligned_be16(0xc0, arr + 58); /* SAM-6 no version claimed */
1703 put_unaligned_be16(0x5c0, arr + 60); /* SPC-5 no version claimed */
1704 n = 62;
1705 if (is_disk) { /* SBC-4 no version claimed */
1706 put_unaligned_be16(0x600, arr + n);
1707 n += 2;
1708 } else if (sdebug_ptype == TYPE_TAPE) { /* SSC-4 rev 3 */
1709 put_unaligned_be16(0x525, arr + n);
1710 n += 2;
1711 } else if (is_zbc) { /* ZBC BSR INCITS 536 revision 05 */
1712 put_unaligned_be16(0x624, arr + n);
1713 n += 2;
1714 }
1715 put_unaligned_be16(0x2100, arr + n); /* SPL-4 no version claimed */
1716 ret = fill_from_dev_buffer(scp, arr,
1717 min_t(int, alloc_len, SDEBUG_LONG_INQ_SZ));
1718 kfree(arr);
1719 return ret;
1720}
1721
1722/* See resp_iec_m_pg() for how this data is manipulated */
1723static unsigned char iec_m_pg[] = {0x1c, 0xa, 0x08, 0, 0, 0, 0, 0,
1724 0, 0, 0x0, 0x0};
1725
1726static int resp_requests(struct scsi_cmnd *scp,
1727 struct sdebug_dev_info *devip)
1728{
1729 unsigned char *cmd = scp->cmnd;
1730 unsigned char arr[SCSI_SENSE_BUFFERSIZE]; /* assume >= 18 bytes */
1731 bool dsense = !!(cmd[1] & 1);
1732 int alloc_len = cmd[4];
1733 int len = 18;
1734 int stopped_state = atomic_read(&devip->stopped);
1735
1736 memset(arr, 0, sizeof(arr));
1737 if (stopped_state > 0) { /* some "pollable" data [spc6r02: 5.12.2] */
1738 if (dsense) {
1739 arr[0] = 0x72;
1740 arr[1] = NOT_READY;
1741 arr[2] = LOGICAL_UNIT_NOT_READY;
1742 arr[3] = (stopped_state == 2) ? 0x1 : 0x2;
1743 len = 8;
1744 } else {
1745 arr[0] = 0x70;
1746 arr[2] = NOT_READY; /* NO_SENSE in sense_key */
1747 arr[7] = 0xa; /* 18 byte sense buffer */
1748 arr[12] = LOGICAL_UNIT_NOT_READY;
1749 arr[13] = (stopped_state == 2) ? 0x1 : 0x2;
1750 }
1751 } else if ((iec_m_pg[2] & 0x4) && (6 == (iec_m_pg[3] & 0xf))) {
1752 /* Information exceptions control mode page: TEST=1, MRIE=6 */
1753 if (dsense) {
1754 arr[0] = 0x72;
1755 arr[1] = 0x0; /* NO_SENSE in sense_key */
1756 arr[2] = THRESHOLD_EXCEEDED;
1757 arr[3] = 0xff; /* Failure prediction(false) */
1758 len = 8;
1759 } else {
1760 arr[0] = 0x70;
1761 arr[2] = 0x0; /* NO_SENSE in sense_key */
1762 arr[7] = 0xa; /* 18 byte sense buffer */
1763 arr[12] = THRESHOLD_EXCEEDED;
1764 arr[13] = 0xff; /* Failure prediction(false) */
1765 }
1766 } else { /* nothing to report */
1767 if (dsense) {
1768 len = 8;
1769 memset(arr, 0, len);
1770 arr[0] = 0x72;
1771 } else {
1772 memset(arr, 0, len);
1773 arr[0] = 0x70;
1774 arr[7] = 0xa;
1775 }
1776 }
1777 return fill_from_dev_buffer(scp, arr, min_t(int, len, alloc_len));
1778}
1779
1780static int resp_start_stop(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
1781{
1782 unsigned char *cmd = scp->cmnd;
1783 int power_cond, want_stop, stopped_state;
1784 bool changing;
1785
1786 power_cond = (cmd[4] & 0xf0) >> 4;
1787 if (power_cond) {
1788 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 4, 7);
1789 return check_condition_result;
1790 }
1791 want_stop = !(cmd[4] & 1);
1792 stopped_state = atomic_read(&devip->stopped);
1793 if (stopped_state == 2) {
1794 ktime_t now_ts = ktime_get_boottime();
1795
1796 if (ktime_to_ns(now_ts) > ktime_to_ns(devip->create_ts)) {
1797 u64 diff_ns = ktime_to_ns(ktime_sub(now_ts, devip->create_ts));
1798
1799 if (diff_ns >= ((u64)sdeb_tur_ms_to_ready * 1000000)) {
1800 /* tur_ms_to_ready timer extinguished */
1801 atomic_set(&devip->stopped, 0);
1802 stopped_state = 0;
1803 }
1804 }
1805 if (stopped_state == 2) {
1806 if (want_stop) {
1807 stopped_state = 1; /* dummy up success */
1808 } else { /* Disallow tur_ms_to_ready delay to be overridden */
1809 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 4, 0 /* START bit */);
1810 return check_condition_result;
1811 }
1812 }
1813 }
1814 changing = (stopped_state != want_stop);
1815 if (changing)
1816 atomic_xchg(&devip->stopped, want_stop);
1817 if (!changing || (cmd[1] & 0x1)) /* state unchanged or IMMED bit set in cdb */
1818 return SDEG_RES_IMMED_MASK;
1819 else
1820 return 0;
1821}
1822
1823static sector_t get_sdebug_capacity(void)
1824{
1825 static const unsigned int gibibyte = 1073741824;
1826
1827 if (sdebug_virtual_gb > 0)
1828 return (sector_t)sdebug_virtual_gb *
1829 (gibibyte / sdebug_sector_size);
1830 else
1831 return sdebug_store_sectors;
1832}
1833
1834#define SDEBUG_READCAP_ARR_SZ 8
1835static int resp_readcap(struct scsi_cmnd *scp,
1836 struct sdebug_dev_info *devip)
1837{
1838 unsigned char arr[SDEBUG_READCAP_ARR_SZ];
1839 unsigned int capac;
1840
1841 /* following just in case virtual_gb changed */
1842 sdebug_capacity = get_sdebug_capacity();
1843 memset(arr, 0, SDEBUG_READCAP_ARR_SZ);
1844 if (sdebug_capacity < 0xffffffff) {
1845 capac = (unsigned int)sdebug_capacity - 1;
1846 put_unaligned_be32(capac, arr + 0);
1847 } else
1848 put_unaligned_be32(0xffffffff, arr + 0);
1849 put_unaligned_be16(sdebug_sector_size, arr + 6);
1850 return fill_from_dev_buffer(scp, arr, SDEBUG_READCAP_ARR_SZ);
1851}
1852
1853#define SDEBUG_READCAP16_ARR_SZ 32
1854static int resp_readcap16(struct scsi_cmnd *scp,
1855 struct sdebug_dev_info *devip)
1856{
1857 unsigned char *cmd = scp->cmnd;
1858 unsigned char arr[SDEBUG_READCAP16_ARR_SZ];
1859 int alloc_len;
1860
1861 alloc_len = get_unaligned_be32(cmd + 10);
1862 /* following just in case virtual_gb changed */
1863 sdebug_capacity = get_sdebug_capacity();
1864 memset(arr, 0, SDEBUG_READCAP16_ARR_SZ);
1865 put_unaligned_be64((u64)(sdebug_capacity - 1), arr + 0);
1866 put_unaligned_be32(sdebug_sector_size, arr + 8);
1867 arr[13] = sdebug_physblk_exp & 0xf;
1868 arr[14] = (sdebug_lowest_aligned >> 8) & 0x3f;
1869
1870 if (scsi_debug_lbp()) {
1871 arr[14] |= 0x80; /* LBPME */
1872 /* from sbc4r07, this LBPRZ field is 1 bit, but the LBPRZ in
1873 * the LB Provisioning VPD page is 3 bits. Note that lbprz=2
1874 * in the wider field maps to 0 in this field.
1875 */
1876 if (sdebug_lbprz & 1) /* precisely what the draft requires */
1877 arr[14] |= 0x40;
1878 }
1879
1880 arr[15] = sdebug_lowest_aligned & 0xff;
1881
1882 if (have_dif_prot) {
1883 arr[12] = (sdebug_dif - 1) << 1; /* P_TYPE */
1884 arr[12] |= 1; /* PROT_EN */
1885 }
1886
1887 return fill_from_dev_buffer(scp, arr,
1888 min_t(int, alloc_len, SDEBUG_READCAP16_ARR_SZ));
1889}
1890
1891#define SDEBUG_MAX_TGTPGS_ARR_SZ 1412
1892
1893static int resp_report_tgtpgs(struct scsi_cmnd *scp,
1894 struct sdebug_dev_info *devip)
1895{
1896 unsigned char *cmd = scp->cmnd;
1897 unsigned char *arr;
1898 int host_no = devip->sdbg_host->shost->host_no;
1899 int n, ret, alen, rlen;
1900 int port_group_a, port_group_b, port_a, port_b;
1901
1902 alen = get_unaligned_be32(cmd + 6);
1903 arr = kzalloc(SDEBUG_MAX_TGTPGS_ARR_SZ, GFP_ATOMIC);
1904 if (! arr)
1905 return DID_REQUEUE << 16;
1906 /*
1907 * EVPD page 0x88 states we have two ports, one
1908 * real and a fake port with no device connected.
1909 * So we create two port groups with one port each
1910 * and set the group with port B to unavailable.
1911 */
1912 port_a = 0x1; /* relative port A */
1913 port_b = 0x2; /* relative port B */
1914 port_group_a = (((host_no + 1) & 0x7f) << 8) +
1915 (devip->channel & 0x7f);
1916 port_group_b = (((host_no + 1) & 0x7f) << 8) +
1917 (devip->channel & 0x7f) + 0x80;
1918
1919 /*
1920 * The asymmetric access state is cycled according to the host_id.
1921 */
1922 n = 4;
1923 if (sdebug_vpd_use_hostno == 0) {
1924 arr[n++] = host_no % 3; /* Asymm access state */
1925 arr[n++] = 0x0F; /* claim: all states are supported */
1926 } else {
1927 arr[n++] = 0x0; /* Active/Optimized path */
1928 arr[n++] = 0x01; /* only support active/optimized paths */
1929 }
1930 put_unaligned_be16(port_group_a, arr + n);
1931 n += 2;
1932 arr[n++] = 0; /* Reserved */
1933 arr[n++] = 0; /* Status code */
1934 arr[n++] = 0; /* Vendor unique */
1935 arr[n++] = 0x1; /* One port per group */
1936 arr[n++] = 0; /* Reserved */
1937 arr[n++] = 0; /* Reserved */
1938 put_unaligned_be16(port_a, arr + n);
1939 n += 2;
1940 arr[n++] = 3; /* Port unavailable */
1941 arr[n++] = 0x08; /* claim: only unavailalbe paths are supported */
1942 put_unaligned_be16(port_group_b, arr + n);
1943 n += 2;
1944 arr[n++] = 0; /* Reserved */
1945 arr[n++] = 0; /* Status code */
1946 arr[n++] = 0; /* Vendor unique */
1947 arr[n++] = 0x1; /* One port per group */
1948 arr[n++] = 0; /* Reserved */
1949 arr[n++] = 0; /* Reserved */
1950 put_unaligned_be16(port_b, arr + n);
1951 n += 2;
1952
1953 rlen = n - 4;
1954 put_unaligned_be32(rlen, arr + 0);
1955
1956 /*
1957 * Return the smallest value of either
1958 * - The allocated length
1959 * - The constructed command length
1960 * - The maximum array size
1961 */
1962 rlen = min_t(int, alen, n);
1963 ret = fill_from_dev_buffer(scp, arr,
1964 min_t(int, rlen, SDEBUG_MAX_TGTPGS_ARR_SZ));
1965 kfree(arr);
1966 return ret;
1967}
1968
1969static int resp_rsup_opcodes(struct scsi_cmnd *scp,
1970 struct sdebug_dev_info *devip)
1971{
1972 bool rctd;
1973 u8 reporting_opts, req_opcode, sdeb_i, supp;
1974 u16 req_sa, u;
1975 u32 alloc_len, a_len;
1976 int k, offset, len, errsts, count, bump, na;
1977 const struct opcode_info_t *oip;
1978 const struct opcode_info_t *r_oip;
1979 u8 *arr;
1980 u8 *cmd = scp->cmnd;
1981
1982 rctd = !!(cmd[2] & 0x80);
1983 reporting_opts = cmd[2] & 0x7;
1984 req_opcode = cmd[3];
1985 req_sa = get_unaligned_be16(cmd + 4);
1986 alloc_len = get_unaligned_be32(cmd + 6);
1987 if (alloc_len < 4 || alloc_len > 0xffff) {
1988 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 6, -1);
1989 return check_condition_result;
1990 }
1991 if (alloc_len > 8192)
1992 a_len = 8192;
1993 else
1994 a_len = alloc_len;
1995 arr = kzalloc((a_len < 256) ? 320 : a_len + 64, GFP_ATOMIC);
1996 if (NULL == arr) {
1997 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
1998 INSUFF_RES_ASCQ);
1999 return check_condition_result;
2000 }
2001 switch (reporting_opts) {
2002 case 0: /* all commands */
2003 /* count number of commands */
2004 for (count = 0, oip = opcode_info_arr;
2005 oip->num_attached != 0xff; ++oip) {
2006 if (F_INV_OP & oip->flags)
2007 continue;
2008 count += (oip->num_attached + 1);
2009 }
2010 bump = rctd ? 20 : 8;
2011 put_unaligned_be32(count * bump, arr);
2012 for (offset = 4, oip = opcode_info_arr;
2013 oip->num_attached != 0xff && offset < a_len; ++oip) {
2014 if (F_INV_OP & oip->flags)
2015 continue;
2016 na = oip->num_attached;
2017 arr[offset] = oip->opcode;
2018 put_unaligned_be16(oip->sa, arr + offset + 2);
2019 if (rctd)
2020 arr[offset + 5] |= 0x2;
2021 if (FF_SA & oip->flags)
2022 arr[offset + 5] |= 0x1;
2023 put_unaligned_be16(oip->len_mask[0], arr + offset + 6);
2024 if (rctd)
2025 put_unaligned_be16(0xa, arr + offset + 8);
2026 r_oip = oip;
2027 for (k = 0, oip = oip->arrp; k < na; ++k, ++oip) {
2028 if (F_INV_OP & oip->flags)
2029 continue;
2030 offset += bump;
2031 arr[offset] = oip->opcode;
2032 put_unaligned_be16(oip->sa, arr + offset + 2);
2033 if (rctd)
2034 arr[offset + 5] |= 0x2;
2035 if (FF_SA & oip->flags)
2036 arr[offset + 5] |= 0x1;
2037 put_unaligned_be16(oip->len_mask[0],
2038 arr + offset + 6);
2039 if (rctd)
2040 put_unaligned_be16(0xa,
2041 arr + offset + 8);
2042 }
2043 oip = r_oip;
2044 offset += bump;
2045 }
2046 break;
2047 case 1: /* one command: opcode only */
2048 case 2: /* one command: opcode plus service action */
2049 case 3: /* one command: if sa==0 then opcode only else opcode+sa */
2050 sdeb_i = opcode_ind_arr[req_opcode];
2051 oip = &opcode_info_arr[sdeb_i];
2052 if (F_INV_OP & oip->flags) {
2053 supp = 1;
2054 offset = 4;
2055 } else {
2056 if (1 == reporting_opts) {
2057 if (FF_SA & oip->flags) {
2058 mk_sense_invalid_fld(scp, SDEB_IN_CDB,
2059 2, 2);
2060 kfree(arr);
2061 return check_condition_result;
2062 }
2063 req_sa = 0;
2064 } else if (2 == reporting_opts &&
2065 0 == (FF_SA & oip->flags)) {
2066 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 4, -1);
2067 kfree(arr); /* point at requested sa */
2068 return check_condition_result;
2069 }
2070 if (0 == (FF_SA & oip->flags) &&
2071 req_opcode == oip->opcode)
2072 supp = 3;
2073 else if (0 == (FF_SA & oip->flags)) {
2074 na = oip->num_attached;
2075 for (k = 0, oip = oip->arrp; k < na;
2076 ++k, ++oip) {
2077 if (req_opcode == oip->opcode)
2078 break;
2079 }
2080 supp = (k >= na) ? 1 : 3;
2081 } else if (req_sa != oip->sa) {
2082 na = oip->num_attached;
2083 for (k = 0, oip = oip->arrp; k < na;
2084 ++k, ++oip) {
2085 if (req_sa == oip->sa)
2086 break;
2087 }
2088 supp = (k >= na) ? 1 : 3;
2089 } else
2090 supp = 3;
2091 if (3 == supp) {
2092 u = oip->len_mask[0];
2093 put_unaligned_be16(u, arr + 2);
2094 arr[4] = oip->opcode;
2095 for (k = 1; k < u; ++k)
2096 arr[4 + k] = (k < 16) ?
2097 oip->len_mask[k] : 0xff;
2098 offset = 4 + u;
2099 } else
2100 offset = 4;
2101 }
2102 arr[1] = (rctd ? 0x80 : 0) | supp;
2103 if (rctd) {
2104 put_unaligned_be16(0xa, arr + offset);
2105 offset += 12;
2106 }
2107 break;
2108 default:
2109 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 2);
2110 kfree(arr);
2111 return check_condition_result;
2112 }
2113 offset = (offset < a_len) ? offset : a_len;
2114 len = (offset < alloc_len) ? offset : alloc_len;
2115 errsts = fill_from_dev_buffer(scp, arr, len);
2116 kfree(arr);
2117 return errsts;
2118}
2119
2120static int resp_rsup_tmfs(struct scsi_cmnd *scp,
2121 struct sdebug_dev_info *devip)
2122{
2123 bool repd;
2124 u32 alloc_len, len;
2125 u8 arr[16];
2126 u8 *cmd = scp->cmnd;
2127
2128 memset(arr, 0, sizeof(arr));
2129 repd = !!(cmd[2] & 0x80);
2130 alloc_len = get_unaligned_be32(cmd + 6);
2131 if (alloc_len < 4) {
2132 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 6, -1);
2133 return check_condition_result;
2134 }
2135 arr[0] = 0xc8; /* ATS | ATSS | LURS */
2136 arr[1] = 0x1; /* ITNRS */
2137 if (repd) {
2138 arr[3] = 0xc;
2139 len = 16;
2140 } else
2141 len = 4;
2142
2143 len = (len < alloc_len) ? len : alloc_len;
2144 return fill_from_dev_buffer(scp, arr, len);
2145}
2146
2147/* <<Following mode page info copied from ST318451LW>> */
2148
2149static int resp_err_recov_pg(unsigned char *p, int pcontrol, int target)
2150{ /* Read-Write Error Recovery page for mode_sense */
2151 unsigned char err_recov_pg[] = {0x1, 0xa, 0xc0, 11, 240, 0, 0, 0,
2152 5, 0, 0xff, 0xff};
2153
2154 memcpy(p, err_recov_pg, sizeof(err_recov_pg));
2155 if (1 == pcontrol)
2156 memset(p + 2, 0, sizeof(err_recov_pg) - 2);
2157 return sizeof(err_recov_pg);
2158}
2159
2160static int resp_disconnect_pg(unsigned char *p, int pcontrol, int target)
2161{ /* Disconnect-Reconnect page for mode_sense */
2162 unsigned char disconnect_pg[] = {0x2, 0xe, 128, 128, 0, 10, 0, 0,
2163 0, 0, 0, 0, 0, 0, 0, 0};
2164
2165 memcpy(p, disconnect_pg, sizeof(disconnect_pg));
2166 if (1 == pcontrol)
2167 memset(p + 2, 0, sizeof(disconnect_pg) - 2);
2168 return sizeof(disconnect_pg);
2169}
2170
2171static int resp_format_pg(unsigned char *p, int pcontrol, int target)
2172{ /* Format device page for mode_sense */
2173 unsigned char format_pg[] = {0x3, 0x16, 0, 0, 0, 0, 0, 0,
2174 0, 0, 0, 0, 0, 0, 0, 0,
2175 0, 0, 0, 0, 0x40, 0, 0, 0};
2176
2177 memcpy(p, format_pg, sizeof(format_pg));
2178 put_unaligned_be16(sdebug_sectors_per, p + 10);
2179 put_unaligned_be16(sdebug_sector_size, p + 12);
2180 if (sdebug_removable)
2181 p[20] |= 0x20; /* should agree with INQUIRY */
2182 if (1 == pcontrol)
2183 memset(p + 2, 0, sizeof(format_pg) - 2);
2184 return sizeof(format_pg);
2185}
2186
2187static unsigned char caching_pg[] = {0x8, 18, 0x14, 0, 0xff, 0xff, 0, 0,
2188 0xff, 0xff, 0xff, 0xff, 0x80, 0x14, 0, 0,
2189 0, 0, 0, 0};
2190
2191static int resp_caching_pg(unsigned char *p, int pcontrol, int target)
2192{ /* Caching page for mode_sense */
2193 unsigned char ch_caching_pg[] = {/* 0x8, 18, */ 0x4, 0, 0, 0, 0, 0,
2194 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
2195 unsigned char d_caching_pg[] = {0x8, 18, 0x14, 0, 0xff, 0xff, 0, 0,
2196 0xff, 0xff, 0xff, 0xff, 0x80, 0x14, 0, 0, 0, 0, 0, 0};
2197
2198 if (SDEBUG_OPT_N_WCE & sdebug_opts)
2199 caching_pg[2] &= ~0x4; /* set WCE=0 (default WCE=1) */
2200 memcpy(p, caching_pg, sizeof(caching_pg));
2201 if (1 == pcontrol)
2202 memcpy(p + 2, ch_caching_pg, sizeof(ch_caching_pg));
2203 else if (2 == pcontrol)
2204 memcpy(p, d_caching_pg, sizeof(d_caching_pg));
2205 return sizeof(caching_pg);
2206}
2207
2208static unsigned char ctrl_m_pg[] = {0xa, 10, 2, 0, 0, 0, 0, 0,
2209 0, 0, 0x2, 0x4b};
2210
2211static int resp_ctrl_m_pg(unsigned char *p, int pcontrol, int target)
2212{ /* Control mode page for mode_sense */
2213 unsigned char ch_ctrl_m_pg[] = {/* 0xa, 10, */ 0x6, 0, 0, 0, 0, 0,
2214 0, 0, 0, 0};
2215 unsigned char d_ctrl_m_pg[] = {0xa, 10, 2, 0, 0, 0, 0, 0,
2216 0, 0, 0x2, 0x4b};
2217
2218 if (sdebug_dsense)
2219 ctrl_m_pg[2] |= 0x4;
2220 else
2221 ctrl_m_pg[2] &= ~0x4;
2222
2223 if (sdebug_ato)
2224 ctrl_m_pg[5] |= 0x80; /* ATO=1 */
2225
2226 memcpy(p, ctrl_m_pg, sizeof(ctrl_m_pg));
2227 if (1 == pcontrol)
2228 memcpy(p + 2, ch_ctrl_m_pg, sizeof(ch_ctrl_m_pg));
2229 else if (2 == pcontrol)
2230 memcpy(p, d_ctrl_m_pg, sizeof(d_ctrl_m_pg));
2231 return sizeof(ctrl_m_pg);
2232}
2233
2234
2235static int resp_iec_m_pg(unsigned char *p, int pcontrol, int target)
2236{ /* Informational Exceptions control mode page for mode_sense */
2237 unsigned char ch_iec_m_pg[] = {/* 0x1c, 0xa, */ 0x4, 0xf, 0, 0, 0, 0,
2238 0, 0, 0x0, 0x0};
2239 unsigned char d_iec_m_pg[] = {0x1c, 0xa, 0x08, 0, 0, 0, 0, 0,
2240 0, 0, 0x0, 0x0};
2241
2242 memcpy(p, iec_m_pg, sizeof(iec_m_pg));
2243 if (1 == pcontrol)
2244 memcpy(p + 2, ch_iec_m_pg, sizeof(ch_iec_m_pg));
2245 else if (2 == pcontrol)
2246 memcpy(p, d_iec_m_pg, sizeof(d_iec_m_pg));
2247 return sizeof(iec_m_pg);
2248}
2249
2250static int resp_sas_sf_m_pg(unsigned char *p, int pcontrol, int target)
2251{ /* SAS SSP mode page - short format for mode_sense */
2252 unsigned char sas_sf_m_pg[] = {0x19, 0x6,
2253 0x6, 0x0, 0x7, 0xd0, 0x0, 0x0};
2254
2255 memcpy(p, sas_sf_m_pg, sizeof(sas_sf_m_pg));
2256 if (1 == pcontrol)
2257 memset(p + 2, 0, sizeof(sas_sf_m_pg) - 2);
2258 return sizeof(sas_sf_m_pg);
2259}
2260
2261
2262static int resp_sas_pcd_m_spg(unsigned char *p, int pcontrol, int target,
2263 int target_dev_id)
2264{ /* SAS phy control and discover mode page for mode_sense */
2265 unsigned char sas_pcd_m_pg[] = {0x59, 0x1, 0, 0x64, 0, 0x6, 0, 2,
2266 0, 0, 0, 0, 0x10, 0x9, 0x8, 0x0,
2267 0, 0, 0, 0, 0, 0, 0, 0, /* insert SAS addr */
2268 0, 0, 0, 0, 0, 0, 0, 0, /* insert SAS addr */
2269 0x2, 0, 0, 0, 0, 0, 0, 0,
2270 0x88, 0x99, 0, 0, 0, 0, 0, 0,
2271 0, 0, 0, 0, 0, 0, 0, 0,
2272 0, 1, 0, 0, 0x10, 0x9, 0x8, 0x0,
2273 0, 0, 0, 0, 0, 0, 0, 0, /* insert SAS addr */
2274 0, 0, 0, 0, 0, 0, 0, 0, /* insert SAS addr */
2275 0x3, 0, 0, 0, 0, 0, 0, 0,
2276 0x88, 0x99, 0, 0, 0, 0, 0, 0,
2277 0, 0, 0, 0, 0, 0, 0, 0,
2278 };
2279 int port_a, port_b;
2280
2281 put_unaligned_be64(naa3_comp_a, sas_pcd_m_pg + 16);
2282 put_unaligned_be64(naa3_comp_c + 1, sas_pcd_m_pg + 24);
2283 put_unaligned_be64(naa3_comp_a, sas_pcd_m_pg + 64);
2284 put_unaligned_be64(naa3_comp_c + 1, sas_pcd_m_pg + 72);
2285 port_a = target_dev_id + 1;
2286 port_b = port_a + 1;
2287 memcpy(p, sas_pcd_m_pg, sizeof(sas_pcd_m_pg));
2288 put_unaligned_be32(port_a, p + 20);
2289 put_unaligned_be32(port_b, p + 48 + 20);
2290 if (1 == pcontrol)
2291 memset(p + 4, 0, sizeof(sas_pcd_m_pg) - 4);
2292 return sizeof(sas_pcd_m_pg);
2293}
2294
2295static int resp_sas_sha_m_spg(unsigned char *p, int pcontrol)
2296{ /* SAS SSP shared protocol specific port mode subpage */
2297 unsigned char sas_sha_m_pg[] = {0x59, 0x2, 0, 0xc, 0, 0x6, 0x10, 0,
2298 0, 0, 0, 0, 0, 0, 0, 0,
2299 };
2300
2301 memcpy(p, sas_sha_m_pg, sizeof(sas_sha_m_pg));
2302 if (1 == pcontrol)
2303 memset(p + 4, 0, sizeof(sas_sha_m_pg) - 4);
2304 return sizeof(sas_sha_m_pg);
2305}
2306
2307#define SDEBUG_MAX_MSENSE_SZ 256
2308
2309static int resp_mode_sense(struct scsi_cmnd *scp,
2310 struct sdebug_dev_info *devip)
2311{
2312 int pcontrol, pcode, subpcode, bd_len;
2313 unsigned char dev_spec;
2314 int alloc_len, offset, len, target_dev_id;
2315 int target = scp->device->id;
2316 unsigned char *ap;
2317 unsigned char arr[SDEBUG_MAX_MSENSE_SZ];
2318 unsigned char *cmd = scp->cmnd;
2319 bool dbd, llbaa, msense_6, is_disk, is_zbc, bad_pcode;
2320
2321 dbd = !!(cmd[1] & 0x8); /* disable block descriptors */
2322 pcontrol = (cmd[2] & 0xc0) >> 6;
2323 pcode = cmd[2] & 0x3f;
2324 subpcode = cmd[3];
2325 msense_6 = (MODE_SENSE == cmd[0]);
2326 llbaa = msense_6 ? false : !!(cmd[1] & 0x10);
2327 is_disk = (sdebug_ptype == TYPE_DISK);
2328 is_zbc = (devip->zmodel != BLK_ZONED_NONE);
2329 if ((is_disk || is_zbc) && !dbd)
2330 bd_len = llbaa ? 16 : 8;
2331 else
2332 bd_len = 0;
2333 alloc_len = msense_6 ? cmd[4] : get_unaligned_be16(cmd + 7);
2334 memset(arr, 0, SDEBUG_MAX_MSENSE_SZ);
2335 if (0x3 == pcontrol) { /* Saving values not supported */
2336 mk_sense_buffer(scp, ILLEGAL_REQUEST, SAVING_PARAMS_UNSUP, 0);
2337 return check_condition_result;
2338 }
2339 target_dev_id = ((devip->sdbg_host->shost->host_no + 1) * 2000) +
2340 (devip->target * 1000) - 3;
2341 /* for disks+zbc set DPOFUA bit and clear write protect (WP) bit */
2342 if (is_disk || is_zbc) {
2343 dev_spec = 0x10; /* =0x90 if WP=1 implies read-only */
2344 if (sdebug_wp)
2345 dev_spec |= 0x80;
2346 } else
2347 dev_spec = 0x0;
2348 if (msense_6) {
2349 arr[2] = dev_spec;
2350 arr[3] = bd_len;
2351 offset = 4;
2352 } else {
2353 arr[3] = dev_spec;
2354 if (16 == bd_len)
2355 arr[4] = 0x1; /* set LONGLBA bit */
2356 arr[7] = bd_len; /* assume 255 or less */
2357 offset = 8;
2358 }
2359 ap = arr + offset;
2360 if ((bd_len > 0) && (!sdebug_capacity))
2361 sdebug_capacity = get_sdebug_capacity();
2362
2363 if (8 == bd_len) {
2364 if (sdebug_capacity > 0xfffffffe)
2365 put_unaligned_be32(0xffffffff, ap + 0);
2366 else
2367 put_unaligned_be32(sdebug_capacity, ap + 0);
2368 put_unaligned_be16(sdebug_sector_size, ap + 6);
2369 offset += bd_len;
2370 ap = arr + offset;
2371 } else if (16 == bd_len) {
2372 put_unaligned_be64((u64)sdebug_capacity, ap + 0);
2373 put_unaligned_be32(sdebug_sector_size, ap + 12);
2374 offset += bd_len;
2375 ap = arr + offset;
2376 }
2377
2378 if ((subpcode > 0x0) && (subpcode < 0xff) && (0x19 != pcode)) {
2379 /* TODO: Control Extension page */
2380 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1);
2381 return check_condition_result;
2382 }
2383 bad_pcode = false;
2384
2385 switch (pcode) {
2386 case 0x1: /* Read-Write error recovery page, direct access */
2387 len = resp_err_recov_pg(ap, pcontrol, target);
2388 offset += len;
2389 break;
2390 case 0x2: /* Disconnect-Reconnect page, all devices */
2391 len = resp_disconnect_pg(ap, pcontrol, target);
2392 offset += len;
2393 break;
2394 case 0x3: /* Format device page, direct access */
2395 if (is_disk) {
2396 len = resp_format_pg(ap, pcontrol, target);
2397 offset += len;
2398 } else
2399 bad_pcode = true;
2400 break;
2401 case 0x8: /* Caching page, direct access */
2402 if (is_disk || is_zbc) {
2403 len = resp_caching_pg(ap, pcontrol, target);
2404 offset += len;
2405 } else
2406 bad_pcode = true;
2407 break;
2408 case 0xa: /* Control Mode page, all devices */
2409 len = resp_ctrl_m_pg(ap, pcontrol, target);
2410 offset += len;
2411 break;
2412 case 0x19: /* if spc==1 then sas phy, control+discover */
2413 if ((subpcode > 0x2) && (subpcode < 0xff)) {
2414 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1);
2415 return check_condition_result;
2416 }
2417 len = 0;
2418 if ((0x0 == subpcode) || (0xff == subpcode))
2419 len += resp_sas_sf_m_pg(ap + len, pcontrol, target);
2420 if ((0x1 == subpcode) || (0xff == subpcode))
2421 len += resp_sas_pcd_m_spg(ap + len, pcontrol, target,
2422 target_dev_id);
2423 if ((0x2 == subpcode) || (0xff == subpcode))
2424 len += resp_sas_sha_m_spg(ap + len, pcontrol);
2425 offset += len;
2426 break;
2427 case 0x1c: /* Informational Exceptions Mode page, all devices */
2428 len = resp_iec_m_pg(ap, pcontrol, target);
2429 offset += len;
2430 break;
2431 case 0x3f: /* Read all Mode pages */
2432 if ((0 == subpcode) || (0xff == subpcode)) {
2433 len = resp_err_recov_pg(ap, pcontrol, target);
2434 len += resp_disconnect_pg(ap + len, pcontrol, target);
2435 if (is_disk) {
2436 len += resp_format_pg(ap + len, pcontrol,
2437 target);
2438 len += resp_caching_pg(ap + len, pcontrol,
2439 target);
2440 } else if (is_zbc) {
2441 len += resp_caching_pg(ap + len, pcontrol,
2442 target);
2443 }
2444 len += resp_ctrl_m_pg(ap + len, pcontrol, target);
2445 len += resp_sas_sf_m_pg(ap + len, pcontrol, target);
2446 if (0xff == subpcode) {
2447 len += resp_sas_pcd_m_spg(ap + len, pcontrol,
2448 target, target_dev_id);
2449 len += resp_sas_sha_m_spg(ap + len, pcontrol);
2450 }
2451 len += resp_iec_m_pg(ap + len, pcontrol, target);
2452 offset += len;
2453 } else {
2454 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1);
2455 return check_condition_result;
2456 }
2457 break;
2458 default:
2459 bad_pcode = true;
2460 break;
2461 }
2462 if (bad_pcode) {
2463 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 5);
2464 return check_condition_result;
2465 }
2466 if (msense_6)
2467 arr[0] = offset - 1;
2468 else
2469 put_unaligned_be16((offset - 2), arr + 0);
2470 return fill_from_dev_buffer(scp, arr, min_t(int, alloc_len, offset));
2471}
2472
2473#define SDEBUG_MAX_MSELECT_SZ 512
2474
2475static int resp_mode_select(struct scsi_cmnd *scp,
2476 struct sdebug_dev_info *devip)
2477{
2478 int pf, sp, ps, md_len, bd_len, off, spf, pg_len;
2479 int param_len, res, mpage;
2480 unsigned char arr[SDEBUG_MAX_MSELECT_SZ];
2481 unsigned char *cmd = scp->cmnd;
2482 int mselect6 = (MODE_SELECT == cmd[0]);
2483
2484 memset(arr, 0, sizeof(arr));
2485 pf = cmd[1] & 0x10;
2486 sp = cmd[1] & 0x1;
2487 param_len = mselect6 ? cmd[4] : get_unaligned_be16(cmd + 7);
2488 if ((0 == pf) || sp || (param_len > SDEBUG_MAX_MSELECT_SZ)) {
2489 mk_sense_invalid_fld(scp, SDEB_IN_CDB, mselect6 ? 4 : 7, -1);
2490 return check_condition_result;
2491 }
2492 res = fetch_to_dev_buffer(scp, arr, param_len);
2493 if (-1 == res)
2494 return DID_ERROR << 16;
2495 else if (sdebug_verbose && (res < param_len))
2496 sdev_printk(KERN_INFO, scp->device,
2497 "%s: cdb indicated=%d, IO sent=%d bytes\n",
2498 __func__, param_len, res);
2499 md_len = mselect6 ? (arr[0] + 1) : (get_unaligned_be16(arr + 0) + 2);
2500 bd_len = mselect6 ? arr[3] : get_unaligned_be16(arr + 6);
2501 if (md_len > 2) {
2502 mk_sense_invalid_fld(scp, SDEB_IN_DATA, 0, -1);
2503 return check_condition_result;
2504 }
2505 off = bd_len + (mselect6 ? 4 : 8);
2506 mpage = arr[off] & 0x3f;
2507 ps = !!(arr[off] & 0x80);
2508 if (ps) {
2509 mk_sense_invalid_fld(scp, SDEB_IN_DATA, off, 7);
2510 return check_condition_result;
2511 }
2512 spf = !!(arr[off] & 0x40);
2513 pg_len = spf ? (get_unaligned_be16(arr + off + 2) + 4) :
2514 (arr[off + 1] + 2);
2515 if ((pg_len + off) > param_len) {
2516 mk_sense_buffer(scp, ILLEGAL_REQUEST,
2517 PARAMETER_LIST_LENGTH_ERR, 0);
2518 return check_condition_result;
2519 }
2520 switch (mpage) {
2521 case 0x8: /* Caching Mode page */
2522 if (caching_pg[1] == arr[off + 1]) {
2523 memcpy(caching_pg + 2, arr + off + 2,
2524 sizeof(caching_pg) - 2);
2525 goto set_mode_changed_ua;
2526 }
2527 break;
2528 case 0xa: /* Control Mode page */
2529 if (ctrl_m_pg[1] == arr[off + 1]) {
2530 memcpy(ctrl_m_pg + 2, arr + off + 2,
2531 sizeof(ctrl_m_pg) - 2);
2532 if (ctrl_m_pg[4] & 0x8)
2533 sdebug_wp = true;
2534 else
2535 sdebug_wp = false;
2536 sdebug_dsense = !!(ctrl_m_pg[2] & 0x4);
2537 goto set_mode_changed_ua;
2538 }
2539 break;
2540 case 0x1c: /* Informational Exceptions Mode page */
2541 if (iec_m_pg[1] == arr[off + 1]) {
2542 memcpy(iec_m_pg + 2, arr + off + 2,
2543 sizeof(iec_m_pg) - 2);
2544 goto set_mode_changed_ua;
2545 }
2546 break;
2547 default:
2548 break;
2549 }
2550 mk_sense_invalid_fld(scp, SDEB_IN_DATA, off, 5);
2551 return check_condition_result;
2552set_mode_changed_ua:
2553 set_bit(SDEBUG_UA_MODE_CHANGED, devip->uas_bm);
2554 return 0;
2555}
2556
2557static int resp_temp_l_pg(unsigned char *arr)
2558{
2559 unsigned char temp_l_pg[] = {0x0, 0x0, 0x3, 0x2, 0x0, 38,
2560 0x0, 0x1, 0x3, 0x2, 0x0, 65,
2561 };
2562
2563 memcpy(arr, temp_l_pg, sizeof(temp_l_pg));
2564 return sizeof(temp_l_pg);
2565}
2566
2567static int resp_ie_l_pg(unsigned char *arr)
2568{
2569 unsigned char ie_l_pg[] = {0x0, 0x0, 0x3, 0x3, 0x0, 0x0, 38,
2570 };
2571
2572 memcpy(arr, ie_l_pg, sizeof(ie_l_pg));
2573 if (iec_m_pg[2] & 0x4) { /* TEST bit set */
2574 arr[4] = THRESHOLD_EXCEEDED;
2575 arr[5] = 0xff;
2576 }
2577 return sizeof(ie_l_pg);
2578}
2579
2580#define SDEBUG_MAX_LSENSE_SZ 512
2581
2582static int resp_log_sense(struct scsi_cmnd *scp,
2583 struct sdebug_dev_info *devip)
2584{
2585 int ppc, sp, pcode, subpcode, alloc_len, len, n;
2586 unsigned char arr[SDEBUG_MAX_LSENSE_SZ];
2587 unsigned char *cmd = scp->cmnd;
2588
2589 memset(arr, 0, sizeof(arr));
2590 ppc = cmd[1] & 0x2;
2591 sp = cmd[1] & 0x1;
2592 if (ppc || sp) {
2593 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, ppc ? 1 : 0);
2594 return check_condition_result;
2595 }
2596 pcode = cmd[2] & 0x3f;
2597 subpcode = cmd[3] & 0xff;
2598 alloc_len = get_unaligned_be16(cmd + 7);
2599 arr[0] = pcode;
2600 if (0 == subpcode) {
2601 switch (pcode) {
2602 case 0x0: /* Supported log pages log page */
2603 n = 4;
2604 arr[n++] = 0x0; /* this page */
2605 arr[n++] = 0xd; /* Temperature */
2606 arr[n++] = 0x2f; /* Informational exceptions */
2607 arr[3] = n - 4;
2608 break;
2609 case 0xd: /* Temperature log page */
2610 arr[3] = resp_temp_l_pg(arr + 4);
2611 break;
2612 case 0x2f: /* Informational exceptions log page */
2613 arr[3] = resp_ie_l_pg(arr + 4);
2614 break;
2615 default:
2616 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 5);
2617 return check_condition_result;
2618 }
2619 } else if (0xff == subpcode) {
2620 arr[0] |= 0x40;
2621 arr[1] = subpcode;
2622 switch (pcode) {
2623 case 0x0: /* Supported log pages and subpages log page */
2624 n = 4;
2625 arr[n++] = 0x0;
2626 arr[n++] = 0x0; /* 0,0 page */
2627 arr[n++] = 0x0;
2628 arr[n++] = 0xff; /* this page */
2629 arr[n++] = 0xd;
2630 arr[n++] = 0x0; /* Temperature */
2631 arr[n++] = 0x2f;
2632 arr[n++] = 0x0; /* Informational exceptions */
2633 arr[3] = n - 4;
2634 break;
2635 case 0xd: /* Temperature subpages */
2636 n = 4;
2637 arr[n++] = 0xd;
2638 arr[n++] = 0x0; /* Temperature */
2639 arr[3] = n - 4;
2640 break;
2641 case 0x2f: /* Informational exceptions subpages */
2642 n = 4;
2643 arr[n++] = 0x2f;
2644 arr[n++] = 0x0; /* Informational exceptions */
2645 arr[3] = n - 4;
2646 break;
2647 default:
2648 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 5);
2649 return check_condition_result;
2650 }
2651 } else {
2652 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1);
2653 return check_condition_result;
2654 }
2655 len = min_t(int, get_unaligned_be16(arr + 2) + 4, alloc_len);
2656 return fill_from_dev_buffer(scp, arr,
2657 min_t(int, len, SDEBUG_MAX_INQ_ARR_SZ));
2658}
2659
2660static inline bool sdebug_dev_is_zoned(struct sdebug_dev_info *devip)
2661{
2662 return devip->nr_zones != 0;
2663}
2664
2665static struct sdeb_zone_state *zbc_zone(struct sdebug_dev_info *devip,
2666 unsigned long long lba)
2667{
2668 return &devip->zstate[lba >> devip->zsize_shift];
2669}
2670
2671static inline bool zbc_zone_is_conv(struct sdeb_zone_state *zsp)
2672{
2673 return zsp->z_type == ZBC_ZONE_TYPE_CNV;
2674}
2675
2676static void zbc_close_zone(struct sdebug_dev_info *devip,
2677 struct sdeb_zone_state *zsp)
2678{
2679 enum sdebug_z_cond zc;
2680
2681 if (zbc_zone_is_conv(zsp))
2682 return;
2683
2684 zc = zsp->z_cond;
2685 if (!(zc == ZC2_IMPLICIT_OPEN || zc == ZC3_EXPLICIT_OPEN))
2686 return;
2687
2688 if (zc == ZC2_IMPLICIT_OPEN)
2689 devip->nr_imp_open--;
2690 else
2691 devip->nr_exp_open--;
2692
2693 if (zsp->z_wp == zsp->z_start) {
2694 zsp->z_cond = ZC1_EMPTY;
2695 } else {
2696 zsp->z_cond = ZC4_CLOSED;
2697 devip->nr_closed++;
2698 }
2699}
2700
2701static void zbc_close_imp_open_zone(struct sdebug_dev_info *devip)
2702{
2703 struct sdeb_zone_state *zsp = &devip->zstate[0];
2704 unsigned int i;
2705
2706 for (i = 0; i < devip->nr_zones; i++, zsp++) {
2707 if (zsp->z_cond == ZC2_IMPLICIT_OPEN) {
2708 zbc_close_zone(devip, zsp);
2709 return;
2710 }
2711 }
2712}
2713
2714static void zbc_open_zone(struct sdebug_dev_info *devip,
2715 struct sdeb_zone_state *zsp, bool explicit)
2716{
2717 enum sdebug_z_cond zc;
2718
2719 if (zbc_zone_is_conv(zsp))
2720 return;
2721
2722 zc = zsp->z_cond;
2723 if ((explicit && zc == ZC3_EXPLICIT_OPEN) ||
2724 (!explicit && zc == ZC2_IMPLICIT_OPEN))
2725 return;
2726
2727 /* Close an implicit open zone if necessary */
2728 if (explicit && zsp->z_cond == ZC2_IMPLICIT_OPEN)
2729 zbc_close_zone(devip, zsp);
2730 else if (devip->max_open &&
2731 devip->nr_imp_open + devip->nr_exp_open >= devip->max_open)
2732 zbc_close_imp_open_zone(devip);
2733
2734 if (zsp->z_cond == ZC4_CLOSED)
2735 devip->nr_closed--;
2736 if (explicit) {
2737 zsp->z_cond = ZC3_EXPLICIT_OPEN;
2738 devip->nr_exp_open++;
2739 } else {
2740 zsp->z_cond = ZC2_IMPLICIT_OPEN;
2741 devip->nr_imp_open++;
2742 }
2743}
2744
2745static void zbc_inc_wp(struct sdebug_dev_info *devip,
2746 unsigned long long lba, unsigned int num)
2747{
2748 struct sdeb_zone_state *zsp = zbc_zone(devip, lba);
2749 unsigned long long n, end, zend = zsp->z_start + zsp->z_size;
2750
2751 if (zbc_zone_is_conv(zsp))
2752 return;
2753
2754 if (zsp->z_type == ZBC_ZONE_TYPE_SWR) {
2755 zsp->z_wp += num;
2756 if (zsp->z_wp >= zend)
2757 zsp->z_cond = ZC5_FULL;
2758 return;
2759 }
2760
2761 while (num) {
2762 if (lba != zsp->z_wp)
2763 zsp->z_non_seq_resource = true;
2764
2765 end = lba + num;
2766 if (end >= zend) {
2767 n = zend - lba;
2768 zsp->z_wp = zend;
2769 } else if (end > zsp->z_wp) {
2770 n = num;
2771 zsp->z_wp = end;
2772 } else {
2773 n = num;
2774 }
2775 if (zsp->z_wp >= zend)
2776 zsp->z_cond = ZC5_FULL;
2777
2778 num -= n;
2779 lba += n;
2780 if (num) {
2781 zsp++;
2782 zend = zsp->z_start + zsp->z_size;
2783 }
2784 }
2785}
2786
2787static int check_zbc_access_params(struct scsi_cmnd *scp,
2788 unsigned long long lba, unsigned int num, bool write)
2789{
2790 struct scsi_device *sdp = scp->device;
2791 struct sdebug_dev_info *devip = (struct sdebug_dev_info *)sdp->hostdata;
2792 struct sdeb_zone_state *zsp = zbc_zone(devip, lba);
2793 struct sdeb_zone_state *zsp_end = zbc_zone(devip, lba + num - 1);
2794
2795 if (!write) {
2796 if (devip->zmodel == BLK_ZONED_HA)
2797 return 0;
2798 /* For host-managed, reads cannot cross zone types boundaries */
2799 if (zsp_end != zsp &&
2800 zbc_zone_is_conv(zsp) &&
2801 !zbc_zone_is_conv(zsp_end)) {
2802 mk_sense_buffer(scp, ILLEGAL_REQUEST,
2803 LBA_OUT_OF_RANGE,
2804 READ_INVDATA_ASCQ);
2805 return check_condition_result;
2806 }
2807 return 0;
2808 }
2809
2810 /* No restrictions for writes within conventional zones */
2811 if (zbc_zone_is_conv(zsp)) {
2812 if (!zbc_zone_is_conv(zsp_end)) {
2813 mk_sense_buffer(scp, ILLEGAL_REQUEST,
2814 LBA_OUT_OF_RANGE,
2815 WRITE_BOUNDARY_ASCQ);
2816 return check_condition_result;
2817 }
2818 return 0;
2819 }
2820
2821 if (zsp->z_type == ZBC_ZONE_TYPE_SWR) {
2822 /* Writes cannot cross sequential zone boundaries */
2823 if (zsp_end != zsp) {
2824 mk_sense_buffer(scp, ILLEGAL_REQUEST,
2825 LBA_OUT_OF_RANGE,
2826 WRITE_BOUNDARY_ASCQ);
2827 return check_condition_result;
2828 }
2829 /* Cannot write full zones */
2830 if (zsp->z_cond == ZC5_FULL) {
2831 mk_sense_buffer(scp, ILLEGAL_REQUEST,
2832 INVALID_FIELD_IN_CDB, 0);
2833 return check_condition_result;
2834 }
2835 /* Writes must be aligned to the zone WP */
2836 if (lba != zsp->z_wp) {
2837 mk_sense_buffer(scp, ILLEGAL_REQUEST,
2838 LBA_OUT_OF_RANGE,
2839 UNALIGNED_WRITE_ASCQ);
2840 return check_condition_result;
2841 }
2842 }
2843
2844 /* Handle implicit open of closed and empty zones */
2845 if (zsp->z_cond == ZC1_EMPTY || zsp->z_cond == ZC4_CLOSED) {
2846 if (devip->max_open &&
2847 devip->nr_exp_open >= devip->max_open) {
2848 mk_sense_buffer(scp, DATA_PROTECT,
2849 INSUFF_RES_ASC,
2850 INSUFF_ZONE_ASCQ);
2851 return check_condition_result;
2852 }
2853 zbc_open_zone(devip, zsp, false);
2854 }
2855
2856 return 0;
2857}
2858
2859static inline int check_device_access_params
2860 (struct scsi_cmnd *scp, unsigned long long lba,
2861 unsigned int num, bool write)
2862{
2863 struct scsi_device *sdp = scp->device;
2864 struct sdebug_dev_info *devip = (struct sdebug_dev_info *)sdp->hostdata;
2865
2866 if (lba + num > sdebug_capacity) {
2867 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
2868 return check_condition_result;
2869 }
2870 /* transfer length excessive (tie in to block limits VPD page) */
2871 if (num > sdebug_store_sectors) {
2872 /* needs work to find which cdb byte 'num' comes from */
2873 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
2874 return check_condition_result;
2875 }
2876 if (write && unlikely(sdebug_wp)) {
2877 mk_sense_buffer(scp, DATA_PROTECT, WRITE_PROTECTED, 0x2);
2878 return check_condition_result;
2879 }
2880 if (sdebug_dev_is_zoned(devip))
2881 return check_zbc_access_params(scp, lba, num, write);
2882
2883 return 0;
2884}
2885
2886/*
2887 * Note: if BUG_ON() fires it usually indicates a problem with the parser
2888 * tables. Perhaps a missing F_FAKE_RW or FF_MEDIA_IO flag. Response functions
2889 * that access any of the "stores" in struct sdeb_store_info should call this
2890 * function with bug_if_fake_rw set to true.
2891 */
2892static inline struct sdeb_store_info *devip2sip(struct sdebug_dev_info *devip,
2893 bool bug_if_fake_rw)
2894{
2895 if (sdebug_fake_rw) {
2896 BUG_ON(bug_if_fake_rw); /* See note above */
2897 return NULL;
2898 }
2899 return xa_load(per_store_ap, devip->sdbg_host->si_idx);
2900}
2901
2902/* Returns number of bytes copied or -1 if error. */
2903static int do_device_access(struct sdeb_store_info *sip, struct scsi_cmnd *scp,
2904 u32 sg_skip, u64 lba, u32 num, bool do_write)
2905{
2906 int ret;
2907 u64 block, rest = 0;
2908 enum dma_data_direction dir;
2909 struct scsi_data_buffer *sdb = &scp->sdb;
2910 u8 *fsp;
2911
2912 if (do_write) {
2913 dir = DMA_TO_DEVICE;
2914 write_since_sync = true;
2915 } else {
2916 dir = DMA_FROM_DEVICE;
2917 }
2918
2919 if (!sdb->length || !sip)
2920 return 0;
2921 if (scp->sc_data_direction != dir)
2922 return -1;
2923 fsp = sip->storep;
2924
2925 block = do_div(lba, sdebug_store_sectors);
2926 if (block + num > sdebug_store_sectors)
2927 rest = block + num - sdebug_store_sectors;
2928
2929 ret = sg_copy_buffer(sdb->table.sgl, sdb->table.nents,
2930 fsp + (block * sdebug_sector_size),
2931 (num - rest) * sdebug_sector_size, sg_skip, do_write);
2932 if (ret != (num - rest) * sdebug_sector_size)
2933 return ret;
2934
2935 if (rest) {
2936 ret += sg_copy_buffer(sdb->table.sgl, sdb->table.nents,
2937 fsp, rest * sdebug_sector_size,
2938 sg_skip + ((num - rest) * sdebug_sector_size),
2939 do_write);
2940 }
2941
2942 return ret;
2943}
2944
2945/* Returns number of bytes copied or -1 if error. */
2946static int do_dout_fetch(struct scsi_cmnd *scp, u32 num, u8 *doutp)
2947{
2948 struct scsi_data_buffer *sdb = &scp->sdb;
2949
2950 if (!sdb->length)
2951 return 0;
2952 if (scp->sc_data_direction != DMA_TO_DEVICE)
2953 return -1;
2954 return sg_copy_buffer(sdb->table.sgl, sdb->table.nents, doutp,
2955 num * sdebug_sector_size, 0, true);
2956}
2957
2958/* If sip->storep+lba compares equal to arr(num), then copy top half of
2959 * arr into sip->storep+lba and return true. If comparison fails then
2960 * return false. */
2961static bool comp_write_worker(struct sdeb_store_info *sip, u64 lba, u32 num,
2962 const u8 *arr, bool compare_only)
2963{
2964 bool res;
2965 u64 block, rest = 0;
2966 u32 store_blks = sdebug_store_sectors;
2967 u32 lb_size = sdebug_sector_size;
2968 u8 *fsp = sip->storep;
2969
2970 block = do_div(lba, store_blks);
2971 if (block + num > store_blks)
2972 rest = block + num - store_blks;
2973
2974 res = !memcmp(fsp + (block * lb_size), arr, (num - rest) * lb_size);
2975 if (!res)
2976 return res;
2977 if (rest)
2978 res = memcmp(fsp, arr + ((num - rest) * lb_size),
2979 rest * lb_size);
2980 if (!res)
2981 return res;
2982 if (compare_only)
2983 return true;
2984 arr += num * lb_size;
2985 memcpy(fsp + (block * lb_size), arr, (num - rest) * lb_size);
2986 if (rest)
2987 memcpy(fsp, arr + ((num - rest) * lb_size), rest * lb_size);
2988 return res;
2989}
2990
2991static __be16 dif_compute_csum(const void *buf, int len)
2992{
2993 __be16 csum;
2994
2995 if (sdebug_guard)
2996 csum = (__force __be16)ip_compute_csum(buf, len);
2997 else
2998 csum = cpu_to_be16(crc_t10dif(buf, len));
2999
3000 return csum;
3001}
3002
3003static int dif_verify(struct t10_pi_tuple *sdt, const void *data,
3004 sector_t sector, u32 ei_lba)
3005{
3006 __be16 csum = dif_compute_csum(data, sdebug_sector_size);
3007
3008 if (sdt->guard_tag != csum) {
3009 pr_err("GUARD check failed on sector %lu rcvd 0x%04x, data 0x%04x\n",
3010 (unsigned long)sector,
3011 be16_to_cpu(sdt->guard_tag),
3012 be16_to_cpu(csum));
3013 return 0x01;
3014 }
3015 if (sdebug_dif == T10_PI_TYPE1_PROTECTION &&
3016 be32_to_cpu(sdt->ref_tag) != (sector & 0xffffffff)) {
3017 pr_err("REF check failed on sector %lu\n",
3018 (unsigned long)sector);
3019 return 0x03;
3020 }
3021 if (sdebug_dif == T10_PI_TYPE2_PROTECTION &&
3022 be32_to_cpu(sdt->ref_tag) != ei_lba) {
3023 pr_err("REF check failed on sector %lu\n",
3024 (unsigned long)sector);
3025 return 0x03;
3026 }
3027 return 0;
3028}
3029
3030static void dif_copy_prot(struct scsi_cmnd *scp, sector_t sector,
3031 unsigned int sectors, bool read)
3032{
3033 size_t resid;
3034 void *paddr;
3035 struct sdeb_store_info *sip = devip2sip((struct sdebug_dev_info *)
3036 scp->device->hostdata, true);
3037 struct t10_pi_tuple *dif_storep = sip->dif_storep;
3038 const void *dif_store_end = dif_storep + sdebug_store_sectors;
3039 struct sg_mapping_iter miter;
3040
3041 /* Bytes of protection data to copy into sgl */
3042 resid = sectors * sizeof(*dif_storep);
3043
3044 sg_miter_start(&miter, scsi_prot_sglist(scp),
3045 scsi_prot_sg_count(scp), SG_MITER_ATOMIC |
3046 (read ? SG_MITER_TO_SG : SG_MITER_FROM_SG));
3047
3048 while (sg_miter_next(&miter) && resid > 0) {
3049 size_t len = min_t(size_t, miter.length, resid);
3050 void *start = dif_store(sip, sector);
3051 size_t rest = 0;
3052
3053 if (dif_store_end < start + len)
3054 rest = start + len - dif_store_end;
3055
3056 paddr = miter.addr;
3057
3058 if (read)
3059 memcpy(paddr, start, len - rest);
3060 else
3061 memcpy(start, paddr, len - rest);
3062
3063 if (rest) {
3064 if (read)
3065 memcpy(paddr + len - rest, dif_storep, rest);
3066 else
3067 memcpy(dif_storep, paddr + len - rest, rest);
3068 }
3069
3070 sector += len / sizeof(*dif_storep);
3071 resid -= len;
3072 }
3073 sg_miter_stop(&miter);
3074}
3075
3076static int prot_verify_read(struct scsi_cmnd *scp, sector_t start_sec,
3077 unsigned int sectors, u32 ei_lba)
3078{
3079 unsigned int i;
3080 sector_t sector;
3081 struct sdeb_store_info *sip = devip2sip((struct sdebug_dev_info *)
3082 scp->device->hostdata, true);
3083 struct t10_pi_tuple *sdt;
3084
3085 for (i = 0; i < sectors; i++, ei_lba++) {
3086 int ret;
3087
3088 sector = start_sec + i;
3089 sdt = dif_store(sip, sector);
3090
3091 if (sdt->app_tag == cpu_to_be16(0xffff))
3092 continue;
3093
3094 ret = dif_verify(sdt, lba2fake_store(sip, sector), sector,
3095 ei_lba);
3096 if (ret) {
3097 dif_errors++;
3098 return ret;
3099 }
3100 }
3101
3102 dif_copy_prot(scp, start_sec, sectors, true);
3103 dix_reads++;
3104
3105 return 0;
3106}
3107
3108static int resp_read_dt0(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
3109{
3110 bool check_prot;
3111 u32 num;
3112 u32 ei_lba;
3113 int ret;
3114 u64 lba;
3115 struct sdeb_store_info *sip = devip2sip(devip, true);
3116 rwlock_t *macc_lckp = sip ? &sip->macc_lck : &sdeb_fake_rw_lck;
3117 u8 *cmd = scp->cmnd;
3118
3119 switch (cmd[0]) {
3120 case READ_16:
3121 ei_lba = 0;
3122 lba = get_unaligned_be64(cmd + 2);
3123 num = get_unaligned_be32(cmd + 10);
3124 check_prot = true;
3125 break;
3126 case READ_10:
3127 ei_lba = 0;
3128 lba = get_unaligned_be32(cmd + 2);
3129 num = get_unaligned_be16(cmd + 7);
3130 check_prot = true;
3131 break;
3132 case READ_6:
3133 ei_lba = 0;
3134 lba = (u32)cmd[3] | (u32)cmd[2] << 8 |
3135 (u32)(cmd[1] & 0x1f) << 16;
3136 num = (0 == cmd[4]) ? 256 : cmd[4];
3137 check_prot = true;
3138 break;
3139 case READ_12:
3140 ei_lba = 0;
3141 lba = get_unaligned_be32(cmd + 2);
3142 num = get_unaligned_be32(cmd + 6);
3143 check_prot = true;
3144 break;
3145 case XDWRITEREAD_10:
3146 ei_lba = 0;
3147 lba = get_unaligned_be32(cmd + 2);
3148 num = get_unaligned_be16(cmd + 7);
3149 check_prot = false;
3150 break;
3151 default: /* assume READ(32) */
3152 lba = get_unaligned_be64(cmd + 12);
3153 ei_lba = get_unaligned_be32(cmd + 20);
3154 num = get_unaligned_be32(cmd + 28);
3155 check_prot = false;
3156 break;
3157 }
3158 if (unlikely(have_dif_prot && check_prot)) {
3159 if (sdebug_dif == T10_PI_TYPE2_PROTECTION &&
3160 (cmd[1] & 0xe0)) {
3161 mk_sense_invalid_opcode(scp);
3162 return check_condition_result;
3163 }
3164 if ((sdebug_dif == T10_PI_TYPE1_PROTECTION ||
3165 sdebug_dif == T10_PI_TYPE3_PROTECTION) &&
3166 (cmd[1] & 0xe0) == 0)
3167 sdev_printk(KERN_ERR, scp->device, "Unprotected RD "
3168 "to DIF device\n");
3169 }
3170 if (unlikely((sdebug_opts & SDEBUG_OPT_SHORT_TRANSFER) &&
3171 atomic_read(&sdeb_inject_pending))) {
3172 num /= 2;
3173 atomic_set(&sdeb_inject_pending, 0);
3174 }
3175
3176 ret = check_device_access_params(scp, lba, num, false);
3177 if (ret)
3178 return ret;
3179 if (unlikely((SDEBUG_OPT_MEDIUM_ERR & sdebug_opts) &&
3180 (lba <= (sdebug_medium_error_start + sdebug_medium_error_count - 1)) &&
3181 ((lba + num) > sdebug_medium_error_start))) {
3182 /* claim unrecoverable read error */
3183 mk_sense_buffer(scp, MEDIUM_ERROR, UNRECOVERED_READ_ERR, 0);
3184 /* set info field and valid bit for fixed descriptor */
3185 if (0x70 == (scp->sense_buffer[0] & 0x7f)) {
3186 scp->sense_buffer[0] |= 0x80; /* Valid bit */
3187 ret = (lba < OPT_MEDIUM_ERR_ADDR)
3188 ? OPT_MEDIUM_ERR_ADDR : (int)lba;
3189 put_unaligned_be32(ret, scp->sense_buffer + 3);
3190 }
3191 scsi_set_resid(scp, scsi_bufflen(scp));
3192 return check_condition_result;
3193 }
3194
3195 read_lock(macc_lckp);
3196
3197 /* DIX + T10 DIF */
3198 if (unlikely(sdebug_dix && scsi_prot_sg_count(scp))) {
3199 int prot_ret = prot_verify_read(scp, lba, num, ei_lba);
3200
3201 if (prot_ret) {
3202 read_unlock(macc_lckp);
3203 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, prot_ret);
3204 return illegal_condition_result;
3205 }
3206 }
3207
3208 ret = do_device_access(sip, scp, 0, lba, num, false);
3209 read_unlock(macc_lckp);
3210 if (unlikely(ret == -1))
3211 return DID_ERROR << 16;
3212
3213 scsi_set_resid(scp, scsi_bufflen(scp) - ret);
3214
3215 if (unlikely((sdebug_opts & SDEBUG_OPT_RECOV_DIF_DIX) &&
3216 atomic_read(&sdeb_inject_pending))) {
3217 if (sdebug_opts & SDEBUG_OPT_RECOVERED_ERR) {
3218 mk_sense_buffer(scp, RECOVERED_ERROR, THRESHOLD_EXCEEDED, 0);
3219 atomic_set(&sdeb_inject_pending, 0);
3220 return check_condition_result;
3221 } else if (sdebug_opts & SDEBUG_OPT_DIF_ERR) {
3222 /* Logical block guard check failed */
3223 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 1);
3224 atomic_set(&sdeb_inject_pending, 0);
3225 return illegal_condition_result;
3226 } else if (SDEBUG_OPT_DIX_ERR & sdebug_opts) {
3227 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 1);
3228 atomic_set(&sdeb_inject_pending, 0);
3229 return illegal_condition_result;
3230 }
3231 }
3232 return 0;
3233}
3234
3235static void dump_sector(unsigned char *buf, int len)
3236{
3237 int i, j, n;
3238
3239 pr_err(">>> Sector Dump <<<\n");
3240 for (i = 0 ; i < len ; i += 16) {
3241 char b[128];
3242
3243 for (j = 0, n = 0; j < 16; j++) {
3244 unsigned char c = buf[i+j];
3245
3246 if (c >= 0x20 && c < 0x7e)
3247 n += scnprintf(b + n, sizeof(b) - n,
3248 " %c ", buf[i+j]);
3249 else
3250 n += scnprintf(b + n, sizeof(b) - n,
3251 "%02x ", buf[i+j]);
3252 }
3253 pr_err("%04d: %s\n", i, b);
3254 }
3255}
3256
3257static int prot_verify_write(struct scsi_cmnd *SCpnt, sector_t start_sec,
3258 unsigned int sectors, u32 ei_lba)
3259{
3260 int ret;
3261 struct t10_pi_tuple *sdt;
3262 void *daddr;
3263 sector_t sector = start_sec;
3264 int ppage_offset;
3265 int dpage_offset;
3266 struct sg_mapping_iter diter;
3267 struct sg_mapping_iter piter;
3268
3269 BUG_ON(scsi_sg_count(SCpnt) == 0);
3270 BUG_ON(scsi_prot_sg_count(SCpnt) == 0);
3271
3272 sg_miter_start(&piter, scsi_prot_sglist(SCpnt),
3273 scsi_prot_sg_count(SCpnt),
3274 SG_MITER_ATOMIC | SG_MITER_FROM_SG);
3275 sg_miter_start(&diter, scsi_sglist(SCpnt), scsi_sg_count(SCpnt),
3276 SG_MITER_ATOMIC | SG_MITER_FROM_SG);
3277
3278 /* For each protection page */
3279 while (sg_miter_next(&piter)) {
3280 dpage_offset = 0;
3281 if (WARN_ON(!sg_miter_next(&diter))) {
3282 ret = 0x01;
3283 goto out;
3284 }
3285
3286 for (ppage_offset = 0; ppage_offset < piter.length;
3287 ppage_offset += sizeof(struct t10_pi_tuple)) {
3288 /* If we're at the end of the current
3289 * data page advance to the next one
3290 */
3291 if (dpage_offset >= diter.length) {
3292 if (WARN_ON(!sg_miter_next(&diter))) {
3293 ret = 0x01;
3294 goto out;
3295 }
3296 dpage_offset = 0;
3297 }
3298
3299 sdt = piter.addr + ppage_offset;
3300 daddr = diter.addr + dpage_offset;
3301
3302 ret = dif_verify(sdt, daddr, sector, ei_lba);
3303 if (ret) {
3304 dump_sector(daddr, sdebug_sector_size);
3305 goto out;
3306 }
3307
3308 sector++;
3309 ei_lba++;
3310 dpage_offset += sdebug_sector_size;
3311 }
3312 diter.consumed = dpage_offset;
3313 sg_miter_stop(&diter);
3314 }
3315 sg_miter_stop(&piter);
3316
3317 dif_copy_prot(SCpnt, start_sec, sectors, false);
3318 dix_writes++;
3319
3320 return 0;
3321
3322out:
3323 dif_errors++;
3324 sg_miter_stop(&diter);
3325 sg_miter_stop(&piter);
3326 return ret;
3327}
3328
3329static unsigned long lba_to_map_index(sector_t lba)
3330{
3331 if (sdebug_unmap_alignment)
3332 lba += sdebug_unmap_granularity - sdebug_unmap_alignment;
3333 sector_div(lba, sdebug_unmap_granularity);
3334 return lba;
3335}
3336
3337static sector_t map_index_to_lba(unsigned long index)
3338{
3339 sector_t lba = index * sdebug_unmap_granularity;
3340
3341 if (sdebug_unmap_alignment)
3342 lba -= sdebug_unmap_granularity - sdebug_unmap_alignment;
3343 return lba;
3344}
3345
3346static unsigned int map_state(struct sdeb_store_info *sip, sector_t lba,
3347 unsigned int *num)
3348{
3349 sector_t end;
3350 unsigned int mapped;
3351 unsigned long index;
3352 unsigned long next;
3353
3354 index = lba_to_map_index(lba);
3355 mapped = test_bit(index, sip->map_storep);
3356
3357 if (mapped)
3358 next = find_next_zero_bit(sip->map_storep, map_size, index);
3359 else
3360 next = find_next_bit(sip->map_storep, map_size, index);
3361
3362 end = min_t(sector_t, sdebug_store_sectors, map_index_to_lba(next));
3363 *num = end - lba;
3364 return mapped;
3365}
3366
3367static void map_region(struct sdeb_store_info *sip, sector_t lba,
3368 unsigned int len)
3369{
3370 sector_t end = lba + len;
3371
3372 while (lba < end) {
3373 unsigned long index = lba_to_map_index(lba);
3374
3375 if (index < map_size)
3376 set_bit(index, sip->map_storep);
3377
3378 lba = map_index_to_lba(index + 1);
3379 }
3380}
3381
3382static void unmap_region(struct sdeb_store_info *sip, sector_t lba,
3383 unsigned int len)
3384{
3385 sector_t end = lba + len;
3386 u8 *fsp = sip->storep;
3387
3388 while (lba < end) {
3389 unsigned long index = lba_to_map_index(lba);
3390
3391 if (lba == map_index_to_lba(index) &&
3392 lba + sdebug_unmap_granularity <= end &&
3393 index < map_size) {
3394 clear_bit(index, sip->map_storep);
3395 if (sdebug_lbprz) { /* for LBPRZ=2 return 0xff_s */
3396 memset(fsp + lba * sdebug_sector_size,
3397 (sdebug_lbprz & 1) ? 0 : 0xff,
3398 sdebug_sector_size *
3399 sdebug_unmap_granularity);
3400 }
3401 if (sip->dif_storep) {
3402 memset(sip->dif_storep + lba, 0xff,
3403 sizeof(*sip->dif_storep) *
3404 sdebug_unmap_granularity);
3405 }
3406 }
3407 lba = map_index_to_lba(index + 1);
3408 }
3409}
3410
3411static int resp_write_dt0(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
3412{
3413 bool check_prot;
3414 u32 num;
3415 u32 ei_lba;
3416 int ret;
3417 u64 lba;
3418 struct sdeb_store_info *sip = devip2sip(devip, true);
3419 rwlock_t *macc_lckp = &sip->macc_lck;
3420 u8 *cmd = scp->cmnd;
3421
3422 switch (cmd[0]) {
3423 case WRITE_16:
3424 ei_lba = 0;
3425 lba = get_unaligned_be64(cmd + 2);
3426 num = get_unaligned_be32(cmd + 10);
3427 check_prot = true;
3428 break;
3429 case WRITE_10:
3430 ei_lba = 0;
3431 lba = get_unaligned_be32(cmd + 2);
3432 num = get_unaligned_be16(cmd + 7);
3433 check_prot = true;
3434 break;
3435 case WRITE_6:
3436 ei_lba = 0;
3437 lba = (u32)cmd[3] | (u32)cmd[2] << 8 |
3438 (u32)(cmd[1] & 0x1f) << 16;
3439 num = (0 == cmd[4]) ? 256 : cmd[4];
3440 check_prot = true;
3441 break;
3442 case WRITE_12:
3443 ei_lba = 0;
3444 lba = get_unaligned_be32(cmd + 2);
3445 num = get_unaligned_be32(cmd + 6);
3446 check_prot = true;
3447 break;
3448 case 0x53: /* XDWRITEREAD(10) */
3449 ei_lba = 0;
3450 lba = get_unaligned_be32(cmd + 2);
3451 num = get_unaligned_be16(cmd + 7);
3452 check_prot = false;
3453 break;
3454 default: /* assume WRITE(32) */
3455 lba = get_unaligned_be64(cmd + 12);
3456 ei_lba = get_unaligned_be32(cmd + 20);
3457 num = get_unaligned_be32(cmd + 28);
3458 check_prot = false;
3459 break;
3460 }
3461 if (unlikely(have_dif_prot && check_prot)) {
3462 if (sdebug_dif == T10_PI_TYPE2_PROTECTION &&
3463 (cmd[1] & 0xe0)) {
3464 mk_sense_invalid_opcode(scp);
3465 return check_condition_result;
3466 }
3467 if ((sdebug_dif == T10_PI_TYPE1_PROTECTION ||
3468 sdebug_dif == T10_PI_TYPE3_PROTECTION) &&
3469 (cmd[1] & 0xe0) == 0)
3470 sdev_printk(KERN_ERR, scp->device, "Unprotected WR "
3471 "to DIF device\n");
3472 }
3473
3474 write_lock(macc_lckp);
3475 ret = check_device_access_params(scp, lba, num, true);
3476 if (ret) {
3477 write_unlock(macc_lckp);
3478 return ret;
3479 }
3480
3481 /* DIX + T10 DIF */
3482 if (unlikely(sdebug_dix && scsi_prot_sg_count(scp))) {
3483 int prot_ret = prot_verify_write(scp, lba, num, ei_lba);
3484
3485 if (prot_ret) {
3486 write_unlock(macc_lckp);
3487 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, prot_ret);
3488 return illegal_condition_result;
3489 }
3490 }
3491
3492 ret = do_device_access(sip, scp, 0, lba, num, true);
3493 if (unlikely(scsi_debug_lbp()))
3494 map_region(sip, lba, num);
3495 /* If ZBC zone then bump its write pointer */
3496 if (sdebug_dev_is_zoned(devip))
3497 zbc_inc_wp(devip, lba, num);
3498 write_unlock(macc_lckp);
3499 if (unlikely(-1 == ret))
3500 return DID_ERROR << 16;
3501 else if (unlikely(sdebug_verbose &&
3502 (ret < (num * sdebug_sector_size))))
3503 sdev_printk(KERN_INFO, scp->device,
3504 "%s: write: cdb indicated=%u, IO sent=%d bytes\n",
3505 my_name, num * sdebug_sector_size, ret);
3506
3507 if (unlikely((sdebug_opts & SDEBUG_OPT_RECOV_DIF_DIX) &&
3508 atomic_read(&sdeb_inject_pending))) {
3509 if (sdebug_opts & SDEBUG_OPT_RECOVERED_ERR) {
3510 mk_sense_buffer(scp, RECOVERED_ERROR, THRESHOLD_EXCEEDED, 0);
3511 atomic_set(&sdeb_inject_pending, 0);
3512 return check_condition_result;
3513 } else if (sdebug_opts & SDEBUG_OPT_DIF_ERR) {
3514 /* Logical block guard check failed */
3515 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 1);
3516 atomic_set(&sdeb_inject_pending, 0);
3517 return illegal_condition_result;
3518 } else if (sdebug_opts & SDEBUG_OPT_DIX_ERR) {
3519 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 1);
3520 atomic_set(&sdeb_inject_pending, 0);
3521 return illegal_condition_result;
3522 }
3523 }
3524 return 0;
3525}
3526
3527/*
3528 * T10 has only specified WRITE SCATTERED(16) and WRITE SCATTERED(32).
3529 * No READ GATHERED yet (requires bidi or long cdb holding gather list).
3530 */
3531static int resp_write_scat(struct scsi_cmnd *scp,
3532 struct sdebug_dev_info *devip)
3533{
3534 u8 *cmd = scp->cmnd;
3535 u8 *lrdp = NULL;
3536 u8 *up;
3537 struct sdeb_store_info *sip = devip2sip(devip, true);
3538 rwlock_t *macc_lckp = &sip->macc_lck;
3539 u8 wrprotect;
3540 u16 lbdof, num_lrd, k;
3541 u32 num, num_by, bt_len, lbdof_blen, sg_off, cum_lb;
3542 u32 lb_size = sdebug_sector_size;
3543 u32 ei_lba;
3544 u64 lba;
3545 int ret, res;
3546 bool is_16;
3547 static const u32 lrd_size = 32; /* + parameter list header size */
3548
3549 if (cmd[0] == VARIABLE_LENGTH_CMD) {
3550 is_16 = false;
3551 wrprotect = (cmd[10] >> 5) & 0x7;
3552 lbdof = get_unaligned_be16(cmd + 12);
3553 num_lrd = get_unaligned_be16(cmd + 16);
3554 bt_len = get_unaligned_be32(cmd + 28);
3555 } else { /* that leaves WRITE SCATTERED(16) */
3556 is_16 = true;
3557 wrprotect = (cmd[2] >> 5) & 0x7;
3558 lbdof = get_unaligned_be16(cmd + 4);
3559 num_lrd = get_unaligned_be16(cmd + 8);
3560 bt_len = get_unaligned_be32(cmd + 10);
3561 if (unlikely(have_dif_prot)) {
3562 if (sdebug_dif == T10_PI_TYPE2_PROTECTION &&
3563 wrprotect) {
3564 mk_sense_invalid_opcode(scp);
3565 return illegal_condition_result;
3566 }
3567 if ((sdebug_dif == T10_PI_TYPE1_PROTECTION ||
3568 sdebug_dif == T10_PI_TYPE3_PROTECTION) &&
3569 wrprotect == 0)
3570 sdev_printk(KERN_ERR, scp->device,
3571 "Unprotected WR to DIF device\n");
3572 }
3573 }
3574 if ((num_lrd == 0) || (bt_len == 0))
3575 return 0; /* T10 says these do-nothings are not errors */
3576 if (lbdof == 0) {
3577 if (sdebug_verbose)
3578 sdev_printk(KERN_INFO, scp->device,
3579 "%s: %s: LB Data Offset field bad\n",
3580 my_name, __func__);
3581 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
3582 return illegal_condition_result;
3583 }
3584 lbdof_blen = lbdof * lb_size;
3585 if ((lrd_size + (num_lrd * lrd_size)) > lbdof_blen) {
3586 if (sdebug_verbose)
3587 sdev_printk(KERN_INFO, scp->device,
3588 "%s: %s: LBA range descriptors don't fit\n",
3589 my_name, __func__);
3590 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
3591 return illegal_condition_result;
3592 }
3593 lrdp = kzalloc(lbdof_blen, GFP_ATOMIC);
3594 if (lrdp == NULL)
3595 return SCSI_MLQUEUE_HOST_BUSY;
3596 if (sdebug_verbose)
3597 sdev_printk(KERN_INFO, scp->device,
3598 "%s: %s: Fetch header+scatter_list, lbdof_blen=%u\n",
3599 my_name, __func__, lbdof_blen);
3600 res = fetch_to_dev_buffer(scp, lrdp, lbdof_blen);
3601 if (res == -1) {
3602 ret = DID_ERROR << 16;
3603 goto err_out;
3604 }
3605
3606 write_lock(macc_lckp);
3607 sg_off = lbdof_blen;
3608 /* Spec says Buffer xfer Length field in number of LBs in dout */
3609 cum_lb = 0;
3610 for (k = 0, up = lrdp + lrd_size; k < num_lrd; ++k, up += lrd_size) {
3611 lba = get_unaligned_be64(up + 0);
3612 num = get_unaligned_be32(up + 8);
3613 if (sdebug_verbose)
3614 sdev_printk(KERN_INFO, scp->device,
3615 "%s: %s: k=%d LBA=0x%llx num=%u sg_off=%u\n",
3616 my_name, __func__, k, lba, num, sg_off);
3617 if (num == 0)
3618 continue;
3619 ret = check_device_access_params(scp, lba, num, true);
3620 if (ret)
3621 goto err_out_unlock;
3622 num_by = num * lb_size;
3623 ei_lba = is_16 ? 0 : get_unaligned_be32(up + 12);
3624
3625 if ((cum_lb + num) > bt_len) {
3626 if (sdebug_verbose)
3627 sdev_printk(KERN_INFO, scp->device,
3628 "%s: %s: sum of blocks > data provided\n",
3629 my_name, __func__);
3630 mk_sense_buffer(scp, ILLEGAL_REQUEST, WRITE_ERROR_ASC,
3631 0);
3632 ret = illegal_condition_result;
3633 goto err_out_unlock;
3634 }
3635
3636 /* DIX + T10 DIF */
3637 if (unlikely(sdebug_dix && scsi_prot_sg_count(scp))) {
3638 int prot_ret = prot_verify_write(scp, lba, num,
3639 ei_lba);
3640
3641 if (prot_ret) {
3642 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10,
3643 prot_ret);
3644 ret = illegal_condition_result;
3645 goto err_out_unlock;
3646 }
3647 }
3648
3649 ret = do_device_access(sip, scp, sg_off, lba, num, true);
3650 /* If ZBC zone then bump its write pointer */
3651 if (sdebug_dev_is_zoned(devip))
3652 zbc_inc_wp(devip, lba, num);
3653 if (unlikely(scsi_debug_lbp()))
3654 map_region(sip, lba, num);
3655 if (unlikely(-1 == ret)) {
3656 ret = DID_ERROR << 16;
3657 goto err_out_unlock;
3658 } else if (unlikely(sdebug_verbose && (ret < num_by)))
3659 sdev_printk(KERN_INFO, scp->device,
3660 "%s: write: cdb indicated=%u, IO sent=%d bytes\n",
3661 my_name, num_by, ret);
3662
3663 if (unlikely((sdebug_opts & SDEBUG_OPT_RECOV_DIF_DIX) &&
3664 atomic_read(&sdeb_inject_pending))) {
3665 if (sdebug_opts & SDEBUG_OPT_RECOVERED_ERR) {
3666 mk_sense_buffer(scp, RECOVERED_ERROR, THRESHOLD_EXCEEDED, 0);
3667 atomic_set(&sdeb_inject_pending, 0);
3668 ret = check_condition_result;
3669 goto err_out_unlock;
3670 } else if (sdebug_opts & SDEBUG_OPT_DIF_ERR) {
3671 /* Logical block guard check failed */
3672 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 1);
3673 atomic_set(&sdeb_inject_pending, 0);
3674 ret = illegal_condition_result;
3675 goto err_out_unlock;
3676 } else if (sdebug_opts & SDEBUG_OPT_DIX_ERR) {
3677 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 1);
3678 atomic_set(&sdeb_inject_pending, 0);
3679 ret = illegal_condition_result;
3680 goto err_out_unlock;
3681 }
3682 }
3683 sg_off += num_by;
3684 cum_lb += num;
3685 }
3686 ret = 0;
3687err_out_unlock:
3688 write_unlock(macc_lckp);
3689err_out:
3690 kfree(lrdp);
3691 return ret;
3692}
3693
3694static int resp_write_same(struct scsi_cmnd *scp, u64 lba, u32 num,
3695 u32 ei_lba, bool unmap, bool ndob)
3696{
3697 struct scsi_device *sdp = scp->device;
3698 struct sdebug_dev_info *devip = (struct sdebug_dev_info *)sdp->hostdata;
3699 unsigned long long i;
3700 u64 block, lbaa;
3701 u32 lb_size = sdebug_sector_size;
3702 int ret;
3703 struct sdeb_store_info *sip = devip2sip((struct sdebug_dev_info *)
3704 scp->device->hostdata, true);
3705 rwlock_t *macc_lckp = &sip->macc_lck;
3706 u8 *fs1p;
3707 u8 *fsp;
3708
3709 write_lock(macc_lckp);
3710
3711 ret = check_device_access_params(scp, lba, num, true);
3712 if (ret) {
3713 write_unlock(macc_lckp);
3714 return ret;
3715 }
3716
3717 if (unmap && scsi_debug_lbp()) {
3718 unmap_region(sip, lba, num);
3719 goto out;
3720 }
3721 lbaa = lba;
3722 block = do_div(lbaa, sdebug_store_sectors);
3723 /* if ndob then zero 1 logical block, else fetch 1 logical block */
3724 fsp = sip->storep;
3725 fs1p = fsp + (block * lb_size);
3726 if (ndob) {
3727 memset(fs1p, 0, lb_size);
3728 ret = 0;
3729 } else
3730 ret = fetch_to_dev_buffer(scp, fs1p, lb_size);
3731
3732 if (-1 == ret) {
3733 write_unlock(&sip->macc_lck);
3734 return DID_ERROR << 16;
3735 } else if (sdebug_verbose && !ndob && (ret < lb_size))
3736 sdev_printk(KERN_INFO, scp->device,
3737 "%s: %s: lb size=%u, IO sent=%d bytes\n",
3738 my_name, "write same", lb_size, ret);
3739
3740 /* Copy first sector to remaining blocks */
3741 for (i = 1 ; i < num ; i++) {
3742 lbaa = lba + i;
3743 block = do_div(lbaa, sdebug_store_sectors);
3744 memmove(fsp + (block * lb_size), fs1p, lb_size);
3745 }
3746 if (scsi_debug_lbp())
3747 map_region(sip, lba, num);
3748 /* If ZBC zone then bump its write pointer */
3749 if (sdebug_dev_is_zoned(devip))
3750 zbc_inc_wp(devip, lba, num);
3751out:
3752 write_unlock(macc_lckp);
3753
3754 return 0;
3755}
3756
3757static int resp_write_same_10(struct scsi_cmnd *scp,
3758 struct sdebug_dev_info *devip)
3759{
3760 u8 *cmd = scp->cmnd;
3761 u32 lba;
3762 u16 num;
3763 u32 ei_lba = 0;
3764 bool unmap = false;
3765
3766 if (cmd[1] & 0x8) {
3767 if (sdebug_lbpws10 == 0) {
3768 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 3);
3769 return check_condition_result;
3770 } else
3771 unmap = true;
3772 }
3773 lba = get_unaligned_be32(cmd + 2);
3774 num = get_unaligned_be16(cmd + 7);
3775 if (num > sdebug_write_same_length) {
3776 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 7, -1);
3777 return check_condition_result;
3778 }
3779 return resp_write_same(scp, lba, num, ei_lba, unmap, false);
3780}
3781
3782static int resp_write_same_16(struct scsi_cmnd *scp,
3783 struct sdebug_dev_info *devip)
3784{
3785 u8 *cmd = scp->cmnd;
3786 u64 lba;
3787 u32 num;
3788 u32 ei_lba = 0;
3789 bool unmap = false;
3790 bool ndob = false;
3791
3792 if (cmd[1] & 0x8) { /* UNMAP */
3793 if (sdebug_lbpws == 0) {
3794 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 3);
3795 return check_condition_result;
3796 } else
3797 unmap = true;
3798 }
3799 if (cmd[1] & 0x1) /* NDOB (no data-out buffer, assumes zeroes) */
3800 ndob = true;
3801 lba = get_unaligned_be64(cmd + 2);
3802 num = get_unaligned_be32(cmd + 10);
3803 if (num > sdebug_write_same_length) {
3804 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 10, -1);
3805 return check_condition_result;
3806 }
3807 return resp_write_same(scp, lba, num, ei_lba, unmap, ndob);
3808}
3809
3810/* Note the mode field is in the same position as the (lower) service action
3811 * field. For the Report supported operation codes command, SPC-4 suggests
3812 * each mode of this command should be reported separately; for future. */
3813static int resp_write_buffer(struct scsi_cmnd *scp,
3814 struct sdebug_dev_info *devip)
3815{
3816 u8 *cmd = scp->cmnd;
3817 struct scsi_device *sdp = scp->device;
3818 struct sdebug_dev_info *dp;
3819 u8 mode;
3820
3821 mode = cmd[1] & 0x1f;
3822 switch (mode) {
3823 case 0x4: /* download microcode (MC) and activate (ACT) */
3824 /* set UAs on this device only */
3825 set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm);
3826 set_bit(SDEBUG_UA_MICROCODE_CHANGED, devip->uas_bm);
3827 break;
3828 case 0x5: /* download MC, save and ACT */
3829 set_bit(SDEBUG_UA_MICROCODE_CHANGED_WO_RESET, devip->uas_bm);
3830 break;
3831 case 0x6: /* download MC with offsets and ACT */
3832 /* set UAs on most devices (LUs) in this target */
3833 list_for_each_entry(dp,
3834 &devip->sdbg_host->dev_info_list,
3835 dev_list)
3836 if (dp->target == sdp->id) {
3837 set_bit(SDEBUG_UA_BUS_RESET, dp->uas_bm);
3838 if (devip != dp)
3839 set_bit(SDEBUG_UA_MICROCODE_CHANGED,
3840 dp->uas_bm);
3841 }
3842 break;
3843 case 0x7: /* download MC with offsets, save, and ACT */
3844 /* set UA on all devices (LUs) in this target */
3845 list_for_each_entry(dp,
3846 &devip->sdbg_host->dev_info_list,
3847 dev_list)
3848 if (dp->target == sdp->id)
3849 set_bit(SDEBUG_UA_MICROCODE_CHANGED_WO_RESET,
3850 dp->uas_bm);
3851 break;
3852 default:
3853 /* do nothing for this command for other mode values */
3854 break;
3855 }
3856 return 0;
3857}
3858
3859static int resp_comp_write(struct scsi_cmnd *scp,
3860 struct sdebug_dev_info *devip)
3861{
3862 u8 *cmd = scp->cmnd;
3863 u8 *arr;
3864 struct sdeb_store_info *sip = devip2sip(devip, true);
3865 rwlock_t *macc_lckp = &sip->macc_lck;
3866 u64 lba;
3867 u32 dnum;
3868 u32 lb_size = sdebug_sector_size;
3869 u8 num;
3870 int ret;
3871 int retval = 0;
3872
3873 lba = get_unaligned_be64(cmd + 2);
3874 num = cmd[13]; /* 1 to a maximum of 255 logical blocks */
3875 if (0 == num)
3876 return 0; /* degenerate case, not an error */
3877 if (sdebug_dif == T10_PI_TYPE2_PROTECTION &&
3878 (cmd[1] & 0xe0)) {
3879 mk_sense_invalid_opcode(scp);
3880 return check_condition_result;
3881 }
3882 if ((sdebug_dif == T10_PI_TYPE1_PROTECTION ||
3883 sdebug_dif == T10_PI_TYPE3_PROTECTION) &&
3884 (cmd[1] & 0xe0) == 0)
3885 sdev_printk(KERN_ERR, scp->device, "Unprotected WR "
3886 "to DIF device\n");
3887 ret = check_device_access_params(scp, lba, num, false);
3888 if (ret)
3889 return ret;
3890 dnum = 2 * num;
3891 arr = kcalloc(lb_size, dnum, GFP_ATOMIC);
3892 if (NULL == arr) {
3893 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
3894 INSUFF_RES_ASCQ);
3895 return check_condition_result;
3896 }
3897
3898 write_lock(macc_lckp);
3899
3900 ret = do_dout_fetch(scp, dnum, arr);
3901 if (ret == -1) {
3902 retval = DID_ERROR << 16;
3903 goto cleanup;
3904 } else if (sdebug_verbose && (ret < (dnum * lb_size)))
3905 sdev_printk(KERN_INFO, scp->device, "%s: compare_write: cdb "
3906 "indicated=%u, IO sent=%d bytes\n", my_name,
3907 dnum * lb_size, ret);
3908 if (!comp_write_worker(sip, lba, num, arr, false)) {
3909 mk_sense_buffer(scp, MISCOMPARE, MISCOMPARE_VERIFY_ASC, 0);
3910 retval = check_condition_result;
3911 goto cleanup;
3912 }
3913 if (scsi_debug_lbp())
3914 map_region(sip, lba, num);
3915cleanup:
3916 write_unlock(macc_lckp);
3917 kfree(arr);
3918 return retval;
3919}
3920
3921struct unmap_block_desc {
3922 __be64 lba;
3923 __be32 blocks;
3924 __be32 __reserved;
3925};
3926
3927static int resp_unmap(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
3928{
3929 unsigned char *buf;
3930 struct unmap_block_desc *desc;
3931 struct sdeb_store_info *sip = devip2sip(devip, true);
3932 rwlock_t *macc_lckp = &sip->macc_lck;
3933 unsigned int i, payload_len, descriptors;
3934 int ret;
3935
3936 if (!scsi_debug_lbp())
3937 return 0; /* fib and say its done */
3938 payload_len = get_unaligned_be16(scp->cmnd + 7);
3939 BUG_ON(scsi_bufflen(scp) != payload_len);
3940
3941 descriptors = (payload_len - 8) / 16;
3942 if (descriptors > sdebug_unmap_max_desc) {
3943 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 7, -1);
3944 return check_condition_result;
3945 }
3946
3947 buf = kzalloc(scsi_bufflen(scp), GFP_ATOMIC);
3948 if (!buf) {
3949 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
3950 INSUFF_RES_ASCQ);
3951 return check_condition_result;
3952 }
3953
3954 scsi_sg_copy_to_buffer(scp, buf, scsi_bufflen(scp));
3955
3956 BUG_ON(get_unaligned_be16(&buf[0]) != payload_len - 2);
3957 BUG_ON(get_unaligned_be16(&buf[2]) != descriptors * 16);
3958
3959 desc = (void *)&buf[8];
3960
3961 write_lock(macc_lckp);
3962
3963 for (i = 0 ; i < descriptors ; i++) {
3964 unsigned long long lba = get_unaligned_be64(&desc[i].lba);
3965 unsigned int num = get_unaligned_be32(&desc[i].blocks);
3966
3967 ret = check_device_access_params(scp, lba, num, true);
3968 if (ret)
3969 goto out;
3970
3971 unmap_region(sip, lba, num);
3972 }
3973
3974 ret = 0;
3975
3976out:
3977 write_unlock(macc_lckp);
3978 kfree(buf);
3979
3980 return ret;
3981}
3982
3983#define SDEBUG_GET_LBA_STATUS_LEN 32
3984
3985static int resp_get_lba_status(struct scsi_cmnd *scp,
3986 struct sdebug_dev_info *devip)
3987{
3988 u8 *cmd = scp->cmnd;
3989 u64 lba;
3990 u32 alloc_len, mapped, num;
3991 int ret;
3992 u8 arr[SDEBUG_GET_LBA_STATUS_LEN];
3993
3994 lba = get_unaligned_be64(cmd + 2);
3995 alloc_len = get_unaligned_be32(cmd + 10);
3996
3997 if (alloc_len < 24)
3998 return 0;
3999
4000 ret = check_device_access_params(scp, lba, 1, false);
4001 if (ret)
4002 return ret;
4003
4004 if (scsi_debug_lbp()) {
4005 struct sdeb_store_info *sip = devip2sip(devip, true);
4006
4007 mapped = map_state(sip, lba, &num);
4008 } else {
4009 mapped = 1;
4010 /* following just in case virtual_gb changed */
4011 sdebug_capacity = get_sdebug_capacity();
4012 if (sdebug_capacity - lba <= 0xffffffff)
4013 num = sdebug_capacity - lba;
4014 else
4015 num = 0xffffffff;
4016 }
4017
4018 memset(arr, 0, SDEBUG_GET_LBA_STATUS_LEN);
4019 put_unaligned_be32(20, arr); /* Parameter Data Length */
4020 put_unaligned_be64(lba, arr + 8); /* LBA */
4021 put_unaligned_be32(num, arr + 16); /* Number of blocks */
4022 arr[20] = !mapped; /* prov_stat=0: mapped; 1: dealloc */
4023
4024 return fill_from_dev_buffer(scp, arr, SDEBUG_GET_LBA_STATUS_LEN);
4025}
4026
4027static int resp_sync_cache(struct scsi_cmnd *scp,
4028 struct sdebug_dev_info *devip)
4029{
4030 int res = 0;
4031 u64 lba;
4032 u32 num_blocks;
4033 u8 *cmd = scp->cmnd;
4034
4035 if (cmd[0] == SYNCHRONIZE_CACHE) { /* 10 byte cdb */
4036 lba = get_unaligned_be32(cmd + 2);
4037 num_blocks = get_unaligned_be16(cmd + 7);
4038 } else { /* SYNCHRONIZE_CACHE(16) */
4039 lba = get_unaligned_be64(cmd + 2);
4040 num_blocks = get_unaligned_be32(cmd + 10);
4041 }
4042 if (lba + num_blocks > sdebug_capacity) {
4043 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
4044 return check_condition_result;
4045 }
4046 if (!write_since_sync || (cmd[1] & 0x2))
4047 res = SDEG_RES_IMMED_MASK;
4048 else /* delay if write_since_sync and IMMED clear */
4049 write_since_sync = false;
4050 return res;
4051}
4052
4053/*
4054 * Assuming the LBA+num_blocks is not out-of-range, this function will return
4055 * CONDITION MET if the specified blocks will/have fitted in the cache, and
4056 * a GOOD status otherwise. Model a disk with a big cache and yield
4057 * CONDITION MET. Actually tries to bring range in main memory into the
4058 * cache associated with the CPU(s).
4059 */
4060static int resp_pre_fetch(struct scsi_cmnd *scp,
4061 struct sdebug_dev_info *devip)
4062{
4063 int res = 0;
4064 u64 lba;
4065 u64 block, rest = 0;
4066 u32 nblks;
4067 u8 *cmd = scp->cmnd;
4068 struct sdeb_store_info *sip = devip2sip(devip, true);
4069 rwlock_t *macc_lckp = &sip->macc_lck;
4070 u8 *fsp = sip->storep;
4071
4072 if (cmd[0] == PRE_FETCH) { /* 10 byte cdb */
4073 lba = get_unaligned_be32(cmd + 2);
4074 nblks = get_unaligned_be16(cmd + 7);
4075 } else { /* PRE-FETCH(16) */
4076 lba = get_unaligned_be64(cmd + 2);
4077 nblks = get_unaligned_be32(cmd + 10);
4078 }
4079 if (lba + nblks > sdebug_capacity) {
4080 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
4081 return check_condition_result;
4082 }
4083 if (!fsp)
4084 goto fini;
4085 /* PRE-FETCH spec says nothing about LBP or PI so skip them */
4086 block = do_div(lba, sdebug_store_sectors);
4087 if (block + nblks > sdebug_store_sectors)
4088 rest = block + nblks - sdebug_store_sectors;
4089
4090 /* Try to bring the PRE-FETCH range into CPU's cache */
4091 read_lock(macc_lckp);
4092 prefetch_range(fsp + (sdebug_sector_size * block),
4093 (nblks - rest) * sdebug_sector_size);
4094 if (rest)
4095 prefetch_range(fsp, rest * sdebug_sector_size);
4096 read_unlock(macc_lckp);
4097fini:
4098 if (cmd[1] & 0x2)
4099 res = SDEG_RES_IMMED_MASK;
4100 return res | condition_met_result;
4101}
4102
4103#define RL_BUCKET_ELEMS 8
4104
4105/* Even though each pseudo target has a REPORT LUNS "well known logical unit"
4106 * (W-LUN), the normal Linux scanning logic does not associate it with a
4107 * device (e.g. /dev/sg7). The following magic will make that association:
4108 * "cd /sys/class/scsi_host/host<n> ; echo '- - 49409' > scan"
4109 * where <n> is a host number. If there are multiple targets in a host then
4110 * the above will associate a W-LUN to each target. To only get a W-LUN
4111 * for target 2, then use "echo '- 2 49409' > scan" .
4112 */
4113static int resp_report_luns(struct scsi_cmnd *scp,
4114 struct sdebug_dev_info *devip)
4115{
4116 unsigned char *cmd = scp->cmnd;
4117 unsigned int alloc_len;
4118 unsigned char select_report;
4119 u64 lun;
4120 struct scsi_lun *lun_p;
4121 u8 arr[RL_BUCKET_ELEMS * sizeof(struct scsi_lun)];
4122 unsigned int lun_cnt; /* normal LUN count (max: 256) */
4123 unsigned int wlun_cnt; /* report luns W-LUN count */
4124 unsigned int tlun_cnt; /* total LUN count */
4125 unsigned int rlen; /* response length (in bytes) */
4126 int k, j, n, res;
4127 unsigned int off_rsp = 0;
4128 const int sz_lun = sizeof(struct scsi_lun);
4129
4130 clear_luns_changed_on_target(devip);
4131
4132 select_report = cmd[2];
4133 alloc_len = get_unaligned_be32(cmd + 6);
4134
4135 if (alloc_len < 4) {
4136 pr_err("alloc len too small %d\n", alloc_len);
4137 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 6, -1);
4138 return check_condition_result;
4139 }
4140
4141 switch (select_report) {
4142 case 0: /* all LUNs apart from W-LUNs */
4143 lun_cnt = sdebug_max_luns;
4144 wlun_cnt = 0;
4145 break;
4146 case 1: /* only W-LUNs */
4147 lun_cnt = 0;
4148 wlun_cnt = 1;
4149 break;
4150 case 2: /* all LUNs */
4151 lun_cnt = sdebug_max_luns;
4152 wlun_cnt = 1;
4153 break;
4154 case 0x10: /* only administrative LUs */
4155 case 0x11: /* see SPC-5 */
4156 case 0x12: /* only subsiduary LUs owned by referenced LU */
4157 default:
4158 pr_debug("select report invalid %d\n", select_report);
4159 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, -1);
4160 return check_condition_result;
4161 }
4162
4163 if (sdebug_no_lun_0 && (lun_cnt > 0))
4164 --lun_cnt;
4165
4166 tlun_cnt = lun_cnt + wlun_cnt;
4167 rlen = tlun_cnt * sz_lun; /* excluding 8 byte header */
4168 scsi_set_resid(scp, scsi_bufflen(scp));
4169 pr_debug("select_report %d luns = %d wluns = %d no_lun0 %d\n",
4170 select_report, lun_cnt, wlun_cnt, sdebug_no_lun_0);
4171
4172 /* loops rely on sizeof response header same as sizeof lun (both 8) */
4173 lun = sdebug_no_lun_0 ? 1 : 0;
4174 for (k = 0, j = 0, res = 0; true; ++k, j = 0) {
4175 memset(arr, 0, sizeof(arr));
4176 lun_p = (struct scsi_lun *)&arr[0];
4177 if (k == 0) {
4178 put_unaligned_be32(rlen, &arr[0]);
4179 ++lun_p;
4180 j = 1;
4181 }
4182 for ( ; j < RL_BUCKET_ELEMS; ++j, ++lun_p) {
4183 if ((k * RL_BUCKET_ELEMS) + j > lun_cnt)
4184 break;
4185 int_to_scsilun(lun++, lun_p);
4186 if (lun > 1 && sdebug_lun_am == SAM_LUN_AM_FLAT)
4187 lun_p->scsi_lun[0] |= 0x40;
4188 }
4189 if (j < RL_BUCKET_ELEMS)
4190 break;
4191 n = j * sz_lun;
4192 res = p_fill_from_dev_buffer(scp, arr, n, off_rsp);
4193 if (res)
4194 return res;
4195 off_rsp += n;
4196 }
4197 if (wlun_cnt) {
4198 int_to_scsilun(SCSI_W_LUN_REPORT_LUNS, lun_p);
4199 ++j;
4200 }
4201 if (j > 0)
4202 res = p_fill_from_dev_buffer(scp, arr, j * sz_lun, off_rsp);
4203 return res;
4204}
4205
4206static int resp_verify(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
4207{
4208 bool is_bytchk3 = false;
4209 u8 bytchk;
4210 int ret, j;
4211 u32 vnum, a_num, off;
4212 const u32 lb_size = sdebug_sector_size;
4213 u64 lba;
4214 u8 *arr;
4215 u8 *cmd = scp->cmnd;
4216 struct sdeb_store_info *sip = devip2sip(devip, true);
4217 rwlock_t *macc_lckp = &sip->macc_lck;
4218
4219 bytchk = (cmd[1] >> 1) & 0x3;
4220 if (bytchk == 0) {
4221 return 0; /* always claim internal verify okay */
4222 } else if (bytchk == 2) {
4223 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 2);
4224 return check_condition_result;
4225 } else if (bytchk == 3) {
4226 is_bytchk3 = true; /* 1 block sent, compared repeatedly */
4227 }
4228 switch (cmd[0]) {
4229 case VERIFY_16:
4230 lba = get_unaligned_be64(cmd + 2);
4231 vnum = get_unaligned_be32(cmd + 10);
4232 break;
4233 case VERIFY: /* is VERIFY(10) */
4234 lba = get_unaligned_be32(cmd + 2);
4235 vnum = get_unaligned_be16(cmd + 7);
4236 break;
4237 default:
4238 mk_sense_invalid_opcode(scp);
4239 return check_condition_result;
4240 }
4241 a_num = is_bytchk3 ? 1 : vnum;
4242 /* Treat following check like one for read (i.e. no write) access */
4243 ret = check_device_access_params(scp, lba, a_num, false);
4244 if (ret)
4245 return ret;
4246
4247 arr = kcalloc(lb_size, vnum, GFP_ATOMIC);
4248 if (!arr) {
4249 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
4250 INSUFF_RES_ASCQ);
4251 return check_condition_result;
4252 }
4253 /* Not changing store, so only need read access */
4254 read_lock(macc_lckp);
4255
4256 ret = do_dout_fetch(scp, a_num, arr);
4257 if (ret == -1) {
4258 ret = DID_ERROR << 16;
4259 goto cleanup;
4260 } else if (sdebug_verbose && (ret < (a_num * lb_size))) {
4261 sdev_printk(KERN_INFO, scp->device,
4262 "%s: %s: cdb indicated=%u, IO sent=%d bytes\n",
4263 my_name, __func__, a_num * lb_size, ret);
4264 }
4265 if (is_bytchk3) {
4266 for (j = 1, off = lb_size; j < vnum; ++j, off += lb_size)
4267 memcpy(arr + off, arr, lb_size);
4268 }
4269 ret = 0;
4270 if (!comp_write_worker(sip, lba, vnum, arr, true)) {
4271 mk_sense_buffer(scp, MISCOMPARE, MISCOMPARE_VERIFY_ASC, 0);
4272 ret = check_condition_result;
4273 goto cleanup;
4274 }
4275cleanup:
4276 read_unlock(macc_lckp);
4277 kfree(arr);
4278 return ret;
4279}
4280
4281#define RZONES_DESC_HD 64
4282
4283/* Report zones depending on start LBA nad reporting options */
4284static int resp_report_zones(struct scsi_cmnd *scp,
4285 struct sdebug_dev_info *devip)
4286{
4287 unsigned int i, max_zones, rep_max_zones, nrz = 0;
4288 int ret = 0;
4289 u32 alloc_len, rep_opts, rep_len;
4290 bool partial;
4291 u64 lba, zs_lba;
4292 u8 *arr = NULL, *desc;
4293 u8 *cmd = scp->cmnd;
4294 struct sdeb_zone_state *zsp;
4295 struct sdeb_store_info *sip = devip2sip(devip, false);
4296 rwlock_t *macc_lckp = sip ? &sip->macc_lck : &sdeb_fake_rw_lck;
4297
4298 if (!sdebug_dev_is_zoned(devip)) {
4299 mk_sense_invalid_opcode(scp);
4300 return check_condition_result;
4301 }
4302 zs_lba = get_unaligned_be64(cmd + 2);
4303 alloc_len = get_unaligned_be32(cmd + 10);
4304 rep_opts = cmd[14] & 0x3f;
4305 partial = cmd[14] & 0x80;
4306
4307 if (zs_lba >= sdebug_capacity) {
4308 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
4309 return check_condition_result;
4310 }
4311
4312 max_zones = devip->nr_zones - (zs_lba >> devip->zsize_shift);
4313 rep_max_zones = min((alloc_len - 64) >> ilog2(RZONES_DESC_HD),
4314 max_zones);
4315
4316 arr = kcalloc(RZONES_DESC_HD, alloc_len, GFP_ATOMIC);
4317 if (!arr) {
4318 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
4319 INSUFF_RES_ASCQ);
4320 return check_condition_result;
4321 }
4322
4323 read_lock(macc_lckp);
4324
4325 desc = arr + 64;
4326 for (i = 0; i < max_zones; i++) {
4327 lba = zs_lba + devip->zsize * i;
4328 if (lba > sdebug_capacity)
4329 break;
4330 zsp = zbc_zone(devip, lba);
4331 switch (rep_opts) {
4332 case 0x00:
4333 /* All zones */
4334 break;
4335 case 0x01:
4336 /* Empty zones */
4337 if (zsp->z_cond != ZC1_EMPTY)
4338 continue;
4339 break;
4340 case 0x02:
4341 /* Implicit open zones */
4342 if (zsp->z_cond != ZC2_IMPLICIT_OPEN)
4343 continue;
4344 break;
4345 case 0x03:
4346 /* Explicit open zones */
4347 if (zsp->z_cond != ZC3_EXPLICIT_OPEN)
4348 continue;
4349 break;
4350 case 0x04:
4351 /* Closed zones */
4352 if (zsp->z_cond != ZC4_CLOSED)
4353 continue;
4354 break;
4355 case 0x05:
4356 /* Full zones */
4357 if (zsp->z_cond != ZC5_FULL)
4358 continue;
4359 break;
4360 case 0x06:
4361 case 0x07:
4362 case 0x10:
4363 /*
4364 * Read-only, offline, reset WP recommended are
4365 * not emulated: no zones to report;
4366 */
4367 continue;
4368 case 0x11:
4369 /* non-seq-resource set */
4370 if (!zsp->z_non_seq_resource)
4371 continue;
4372 break;
4373 case 0x3f:
4374 /* Not write pointer (conventional) zones */
4375 if (!zbc_zone_is_conv(zsp))
4376 continue;
4377 break;
4378 default:
4379 mk_sense_buffer(scp, ILLEGAL_REQUEST,
4380 INVALID_FIELD_IN_CDB, 0);
4381 ret = check_condition_result;
4382 goto fini;
4383 }
4384
4385 if (nrz < rep_max_zones) {
4386 /* Fill zone descriptor */
4387 desc[0] = zsp->z_type;
4388 desc[1] = zsp->z_cond << 4;
4389 if (zsp->z_non_seq_resource)
4390 desc[1] |= 1 << 1;
4391 put_unaligned_be64((u64)zsp->z_size, desc + 8);
4392 put_unaligned_be64((u64)zsp->z_start, desc + 16);
4393 put_unaligned_be64((u64)zsp->z_wp, desc + 24);
4394 desc += 64;
4395 }
4396
4397 if (partial && nrz >= rep_max_zones)
4398 break;
4399
4400 nrz++;
4401 }
4402
4403 /* Report header */
4404 put_unaligned_be32(nrz * RZONES_DESC_HD, arr + 0);
4405 put_unaligned_be64(sdebug_capacity - 1, arr + 8);
4406
4407 rep_len = (unsigned long)desc - (unsigned long)arr;
4408 ret = fill_from_dev_buffer(scp, arr, min_t(int, alloc_len, rep_len));
4409
4410fini:
4411 read_unlock(macc_lckp);
4412 kfree(arr);
4413 return ret;
4414}
4415
4416/* Logic transplanted from tcmu-runner, file_zbc.c */
4417static void zbc_open_all(struct sdebug_dev_info *devip)
4418{
4419 struct sdeb_zone_state *zsp = &devip->zstate[0];
4420 unsigned int i;
4421
4422 for (i = 0; i < devip->nr_zones; i++, zsp++) {
4423 if (zsp->z_cond == ZC4_CLOSED)
4424 zbc_open_zone(devip, &devip->zstate[i], true);
4425 }
4426}
4427
4428static int resp_open_zone(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
4429{
4430 int res = 0;
4431 u64 z_id;
4432 enum sdebug_z_cond zc;
4433 u8 *cmd = scp->cmnd;
4434 struct sdeb_zone_state *zsp;
4435 bool all = cmd[14] & 0x01;
4436 struct sdeb_store_info *sip = devip2sip(devip, false);
4437 rwlock_t *macc_lckp = sip ? &sip->macc_lck : &sdeb_fake_rw_lck;
4438
4439 if (!sdebug_dev_is_zoned(devip)) {
4440 mk_sense_invalid_opcode(scp);
4441 return check_condition_result;
4442 }
4443
4444 write_lock(macc_lckp);
4445
4446 if (all) {
4447 /* Check if all closed zones can be open */
4448 if (devip->max_open &&
4449 devip->nr_exp_open + devip->nr_closed > devip->max_open) {
4450 mk_sense_buffer(scp, DATA_PROTECT, INSUFF_RES_ASC,
4451 INSUFF_ZONE_ASCQ);
4452 res = check_condition_result;
4453 goto fini;
4454 }
4455 /* Open all closed zones */
4456 zbc_open_all(devip);
4457 goto fini;
4458 }
4459
4460 /* Open the specified zone */
4461 z_id = get_unaligned_be64(cmd + 2);
4462 if (z_id >= sdebug_capacity) {
4463 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
4464 res = check_condition_result;
4465 goto fini;
4466 }
4467
4468 zsp = zbc_zone(devip, z_id);
4469 if (z_id != zsp->z_start) {
4470 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
4471 res = check_condition_result;
4472 goto fini;
4473 }
4474 if (zbc_zone_is_conv(zsp)) {
4475 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
4476 res = check_condition_result;
4477 goto fini;
4478 }
4479
4480 zc = zsp->z_cond;
4481 if (zc == ZC3_EXPLICIT_OPEN || zc == ZC5_FULL)
4482 goto fini;
4483
4484 if (devip->max_open && devip->nr_exp_open >= devip->max_open) {
4485 mk_sense_buffer(scp, DATA_PROTECT, INSUFF_RES_ASC,
4486 INSUFF_ZONE_ASCQ);
4487 res = check_condition_result;
4488 goto fini;
4489 }
4490
4491 zbc_open_zone(devip, zsp, true);
4492fini:
4493 write_unlock(macc_lckp);
4494 return res;
4495}
4496
4497static void zbc_close_all(struct sdebug_dev_info *devip)
4498{
4499 unsigned int i;
4500
4501 for (i = 0; i < devip->nr_zones; i++)
4502 zbc_close_zone(devip, &devip->zstate[i]);
4503}
4504
4505static int resp_close_zone(struct scsi_cmnd *scp,
4506 struct sdebug_dev_info *devip)
4507{
4508 int res = 0;
4509 u64 z_id;
4510 u8 *cmd = scp->cmnd;
4511 struct sdeb_zone_state *zsp;
4512 bool all = cmd[14] & 0x01;
4513 struct sdeb_store_info *sip = devip2sip(devip, false);
4514 rwlock_t *macc_lckp = sip ? &sip->macc_lck : &sdeb_fake_rw_lck;
4515
4516 if (!sdebug_dev_is_zoned(devip)) {
4517 mk_sense_invalid_opcode(scp);
4518 return check_condition_result;
4519 }
4520
4521 write_lock(macc_lckp);
4522
4523 if (all) {
4524 zbc_close_all(devip);
4525 goto fini;
4526 }
4527
4528 /* Close specified zone */
4529 z_id = get_unaligned_be64(cmd + 2);
4530 if (z_id >= sdebug_capacity) {
4531 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
4532 res = check_condition_result;
4533 goto fini;
4534 }
4535
4536 zsp = zbc_zone(devip, z_id);
4537 if (z_id != zsp->z_start) {
4538 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
4539 res = check_condition_result;
4540 goto fini;
4541 }
4542 if (zbc_zone_is_conv(zsp)) {
4543 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
4544 res = check_condition_result;
4545 goto fini;
4546 }
4547
4548 zbc_close_zone(devip, zsp);
4549fini:
4550 write_unlock(macc_lckp);
4551 return res;
4552}
4553
4554static void zbc_finish_zone(struct sdebug_dev_info *devip,
4555 struct sdeb_zone_state *zsp, bool empty)
4556{
4557 enum sdebug_z_cond zc = zsp->z_cond;
4558
4559 if (zc == ZC4_CLOSED || zc == ZC2_IMPLICIT_OPEN ||
4560 zc == ZC3_EXPLICIT_OPEN || (empty && zc == ZC1_EMPTY)) {
4561 if (zc == ZC2_IMPLICIT_OPEN || zc == ZC3_EXPLICIT_OPEN)
4562 zbc_close_zone(devip, zsp);
4563 if (zsp->z_cond == ZC4_CLOSED)
4564 devip->nr_closed--;
4565 zsp->z_wp = zsp->z_start + zsp->z_size;
4566 zsp->z_cond = ZC5_FULL;
4567 }
4568}
4569
4570static void zbc_finish_all(struct sdebug_dev_info *devip)
4571{
4572 unsigned int i;
4573
4574 for (i = 0; i < devip->nr_zones; i++)
4575 zbc_finish_zone(devip, &devip->zstate[i], false);
4576}
4577
4578static int resp_finish_zone(struct scsi_cmnd *scp,
4579 struct sdebug_dev_info *devip)
4580{
4581 struct sdeb_zone_state *zsp;
4582 int res = 0;
4583 u64 z_id;
4584 u8 *cmd = scp->cmnd;
4585 bool all = cmd[14] & 0x01;
4586 struct sdeb_store_info *sip = devip2sip(devip, false);
4587 rwlock_t *macc_lckp = sip ? &sip->macc_lck : &sdeb_fake_rw_lck;
4588
4589 if (!sdebug_dev_is_zoned(devip)) {
4590 mk_sense_invalid_opcode(scp);
4591 return check_condition_result;
4592 }
4593
4594 write_lock(macc_lckp);
4595
4596 if (all) {
4597 zbc_finish_all(devip);
4598 goto fini;
4599 }
4600
4601 /* Finish the specified zone */
4602 z_id = get_unaligned_be64(cmd + 2);
4603 if (z_id >= sdebug_capacity) {
4604 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
4605 res = check_condition_result;
4606 goto fini;
4607 }
4608
4609 zsp = zbc_zone(devip, z_id);
4610 if (z_id != zsp->z_start) {
4611 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
4612 res = check_condition_result;
4613 goto fini;
4614 }
4615 if (zbc_zone_is_conv(zsp)) {
4616 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
4617 res = check_condition_result;
4618 goto fini;
4619 }
4620
4621 zbc_finish_zone(devip, zsp, true);
4622fini:
4623 write_unlock(macc_lckp);
4624 return res;
4625}
4626
4627static void zbc_rwp_zone(struct sdebug_dev_info *devip,
4628 struct sdeb_zone_state *zsp)
4629{
4630 enum sdebug_z_cond zc;
4631
4632 if (zbc_zone_is_conv(zsp))
4633 return;
4634
4635 zc = zsp->z_cond;
4636 if (zc == ZC2_IMPLICIT_OPEN || zc == ZC3_EXPLICIT_OPEN)
4637 zbc_close_zone(devip, zsp);
4638
4639 if (zsp->z_cond == ZC4_CLOSED)
4640 devip->nr_closed--;
4641
4642 zsp->z_non_seq_resource = false;
4643 zsp->z_wp = zsp->z_start;
4644 zsp->z_cond = ZC1_EMPTY;
4645}
4646
4647static void zbc_rwp_all(struct sdebug_dev_info *devip)
4648{
4649 unsigned int i;
4650
4651 for (i = 0; i < devip->nr_zones; i++)
4652 zbc_rwp_zone(devip, &devip->zstate[i]);
4653}
4654
4655static int resp_rwp_zone(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
4656{
4657 struct sdeb_zone_state *zsp;
4658 int res = 0;
4659 u64 z_id;
4660 u8 *cmd = scp->cmnd;
4661 bool all = cmd[14] & 0x01;
4662 struct sdeb_store_info *sip = devip2sip(devip, false);
4663 rwlock_t *macc_lckp = sip ? &sip->macc_lck : &sdeb_fake_rw_lck;
4664
4665 if (!sdebug_dev_is_zoned(devip)) {
4666 mk_sense_invalid_opcode(scp);
4667 return check_condition_result;
4668 }
4669
4670 write_lock(macc_lckp);
4671
4672 if (all) {
4673 zbc_rwp_all(devip);
4674 goto fini;
4675 }
4676
4677 z_id = get_unaligned_be64(cmd + 2);
4678 if (z_id >= sdebug_capacity) {
4679 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
4680 res = check_condition_result;
4681 goto fini;
4682 }
4683
4684 zsp = zbc_zone(devip, z_id);
4685 if (z_id != zsp->z_start) {
4686 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
4687 res = check_condition_result;
4688 goto fini;
4689 }
4690 if (zbc_zone_is_conv(zsp)) {
4691 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
4692 res = check_condition_result;
4693 goto fini;
4694 }
4695
4696 zbc_rwp_zone(devip, zsp);
4697fini:
4698 write_unlock(macc_lckp);
4699 return res;
4700}
4701
4702static struct sdebug_queue *get_queue(struct scsi_cmnd *cmnd)
4703{
4704 u16 hwq;
4705 u32 tag = blk_mq_unique_tag(cmnd->request);
4706
4707 hwq = blk_mq_unique_tag_to_hwq(tag);
4708
4709 pr_debug("tag=%#x, hwq=%d\n", tag, hwq);
4710 if (WARN_ON_ONCE(hwq >= submit_queues))
4711 hwq = 0;
4712
4713 return sdebug_q_arr + hwq;
4714}
4715
4716static u32 get_tag(struct scsi_cmnd *cmnd)
4717{
4718 return blk_mq_unique_tag(cmnd->request);
4719}
4720
4721/* Queued (deferred) command completions converge here. */
4722static void sdebug_q_cmd_complete(struct sdebug_defer *sd_dp)
4723{
4724 bool aborted = sd_dp->aborted;
4725 int qc_idx;
4726 int retiring = 0;
4727 unsigned long iflags;
4728 struct sdebug_queue *sqp;
4729 struct sdebug_queued_cmd *sqcp;
4730 struct scsi_cmnd *scp;
4731 struct sdebug_dev_info *devip;
4732
4733 if (unlikely(aborted))
4734 sd_dp->aborted = false;
4735 qc_idx = sd_dp->qc_idx;
4736 sqp = sdebug_q_arr + sd_dp->sqa_idx;
4737 if (sdebug_statistics) {
4738 atomic_inc(&sdebug_completions);
4739 if (raw_smp_processor_id() != sd_dp->issuing_cpu)
4740 atomic_inc(&sdebug_miss_cpus);
4741 }
4742 if (unlikely((qc_idx < 0) || (qc_idx >= SDEBUG_CANQUEUE))) {
4743 pr_err("wild qc_idx=%d\n", qc_idx);
4744 return;
4745 }
4746 spin_lock_irqsave(&sqp->qc_lock, iflags);
4747 sd_dp->defer_t = SDEB_DEFER_NONE;
4748 sqcp = &sqp->qc_arr[qc_idx];
4749 scp = sqcp->a_cmnd;
4750 if (unlikely(scp == NULL)) {
4751 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
4752 pr_err("scp is NULL, sqa_idx=%d, qc_idx=%d, hc_idx=%d\n",
4753 sd_dp->sqa_idx, qc_idx, sd_dp->hc_idx);
4754 return;
4755 }
4756 devip = (struct sdebug_dev_info *)scp->device->hostdata;
4757 if (likely(devip))
4758 atomic_dec(&devip->num_in_q);
4759 else
4760 pr_err("devip=NULL\n");
4761 if (unlikely(atomic_read(&retired_max_queue) > 0))
4762 retiring = 1;
4763
4764 sqcp->a_cmnd = NULL;
4765 if (unlikely(!test_and_clear_bit(qc_idx, sqp->in_use_bm))) {
4766 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
4767 pr_err("Unexpected completion\n");
4768 return;
4769 }
4770
4771 if (unlikely(retiring)) { /* user has reduced max_queue */
4772 int k, retval;
4773
4774 retval = atomic_read(&retired_max_queue);
4775 if (qc_idx >= retval) {
4776 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
4777 pr_err("index %d too large\n", retval);
4778 return;
4779 }
4780 k = find_last_bit(sqp->in_use_bm, retval);
4781 if ((k < sdebug_max_queue) || (k == retval))
4782 atomic_set(&retired_max_queue, 0);
4783 else
4784 atomic_set(&retired_max_queue, k + 1);
4785 }
4786 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
4787 if (unlikely(aborted)) {
4788 if (sdebug_verbose)
4789 pr_info("bypassing scsi_done() due to aborted cmd\n");
4790 return;
4791 }
4792 scp->scsi_done(scp); /* callback to mid level */
4793}
4794
4795/* When high resolution timer goes off this function is called. */
4796static enum hrtimer_restart sdebug_q_cmd_hrt_complete(struct hrtimer *timer)
4797{
4798 struct sdebug_defer *sd_dp = container_of(timer, struct sdebug_defer,
4799 hrt);
4800 sdebug_q_cmd_complete(sd_dp);
4801 return HRTIMER_NORESTART;
4802}
4803
4804/* When work queue schedules work, it calls this function. */
4805static void sdebug_q_cmd_wq_complete(struct work_struct *work)
4806{
4807 struct sdebug_defer *sd_dp = container_of(work, struct sdebug_defer,
4808 ew.work);
4809 sdebug_q_cmd_complete(sd_dp);
4810}
4811
4812static bool got_shared_uuid;
4813static uuid_t shared_uuid;
4814
4815static int sdebug_device_create_zones(struct sdebug_dev_info *devip)
4816{
4817 struct sdeb_zone_state *zsp;
4818 sector_t capacity = get_sdebug_capacity();
4819 sector_t zstart = 0;
4820 unsigned int i;
4821
4822 /*
4823 * Set the zone size: if sdeb_zbc_zone_size_mb is not set, figure out
4824 * a zone size allowing for at least 4 zones on the device. Otherwise,
4825 * use the specified zone size checking that at least 2 zones can be
4826 * created for the device.
4827 */
4828 if (!sdeb_zbc_zone_size_mb) {
4829 devip->zsize = (DEF_ZBC_ZONE_SIZE_MB * SZ_1M)
4830 >> ilog2(sdebug_sector_size);
4831 while (capacity < devip->zsize << 2 && devip->zsize >= 2)
4832 devip->zsize >>= 1;
4833 if (devip->zsize < 2) {
4834 pr_err("Device capacity too small\n");
4835 return -EINVAL;
4836 }
4837 } else {
4838 if (!is_power_of_2(sdeb_zbc_zone_size_mb)) {
4839 pr_err("Zone size is not a power of 2\n");
4840 return -EINVAL;
4841 }
4842 devip->zsize = (sdeb_zbc_zone_size_mb * SZ_1M)
4843 >> ilog2(sdebug_sector_size);
4844 if (devip->zsize >= capacity) {
4845 pr_err("Zone size too large for device capacity\n");
4846 return -EINVAL;
4847 }
4848 }
4849
4850 devip->zsize_shift = ilog2(devip->zsize);
4851 devip->nr_zones = (capacity + devip->zsize - 1) >> devip->zsize_shift;
4852
4853 if (sdeb_zbc_nr_conv >= devip->nr_zones) {
4854 pr_err("Number of conventional zones too large\n");
4855 return -EINVAL;
4856 }
4857 devip->nr_conv_zones = sdeb_zbc_nr_conv;
4858
4859 if (devip->zmodel == BLK_ZONED_HM) {
4860 /* zbc_max_open_zones can be 0, meaning "not reported" */
4861 if (sdeb_zbc_max_open >= devip->nr_zones - 1)
4862 devip->max_open = (devip->nr_zones - 1) / 2;
4863 else
4864 devip->max_open = sdeb_zbc_max_open;
4865 }
4866
4867 devip->zstate = kcalloc(devip->nr_zones,
4868 sizeof(struct sdeb_zone_state), GFP_KERNEL);
4869 if (!devip->zstate)
4870 return -ENOMEM;
4871
4872 for (i = 0; i < devip->nr_zones; i++) {
4873 zsp = &devip->zstate[i];
4874
4875 zsp->z_start = zstart;
4876
4877 if (i < devip->nr_conv_zones) {
4878 zsp->z_type = ZBC_ZONE_TYPE_CNV;
4879 zsp->z_cond = ZBC_NOT_WRITE_POINTER;
4880 zsp->z_wp = (sector_t)-1;
4881 } else {
4882 if (devip->zmodel == BLK_ZONED_HM)
4883 zsp->z_type = ZBC_ZONE_TYPE_SWR;
4884 else
4885 zsp->z_type = ZBC_ZONE_TYPE_SWP;
4886 zsp->z_cond = ZC1_EMPTY;
4887 zsp->z_wp = zsp->z_start;
4888 }
4889
4890 if (zsp->z_start + devip->zsize < capacity)
4891 zsp->z_size = devip->zsize;
4892 else
4893 zsp->z_size = capacity - zsp->z_start;
4894
4895 zstart += zsp->z_size;
4896 }
4897
4898 return 0;
4899}
4900
4901static struct sdebug_dev_info *sdebug_device_create(
4902 struct sdebug_host_info *sdbg_host, gfp_t flags)
4903{
4904 struct sdebug_dev_info *devip;
4905
4906 devip = kzalloc(sizeof(*devip), flags);
4907 if (devip) {
4908 if (sdebug_uuid_ctl == 1)
4909 uuid_gen(&devip->lu_name);
4910 else if (sdebug_uuid_ctl == 2) {
4911 if (got_shared_uuid)
4912 devip->lu_name = shared_uuid;
4913 else {
4914 uuid_gen(&shared_uuid);
4915 got_shared_uuid = true;
4916 devip->lu_name = shared_uuid;
4917 }
4918 }
4919 devip->sdbg_host = sdbg_host;
4920 if (sdeb_zbc_in_use) {
4921 devip->zmodel = sdeb_zbc_model;
4922 if (sdebug_device_create_zones(devip)) {
4923 kfree(devip);
4924 return NULL;
4925 }
4926 } else {
4927 devip->zmodel = BLK_ZONED_NONE;
4928 }
4929 devip->sdbg_host = sdbg_host;
4930 devip->create_ts = ktime_get_boottime();
4931 atomic_set(&devip->stopped, (sdeb_tur_ms_to_ready > 0 ? 2 : 0));
4932 list_add_tail(&devip->dev_list, &sdbg_host->dev_info_list);
4933 }
4934 return devip;
4935}
4936
4937static struct sdebug_dev_info *find_build_dev_info(struct scsi_device *sdev)
4938{
4939 struct sdebug_host_info *sdbg_host;
4940 struct sdebug_dev_info *open_devip = NULL;
4941 struct sdebug_dev_info *devip;
4942
4943 sdbg_host = *(struct sdebug_host_info **)shost_priv(sdev->host);
4944 if (!sdbg_host) {
4945 pr_err("Host info NULL\n");
4946 return NULL;
4947 }
4948
4949 list_for_each_entry(devip, &sdbg_host->dev_info_list, dev_list) {
4950 if ((devip->used) && (devip->channel == sdev->channel) &&
4951 (devip->target == sdev->id) &&
4952 (devip->lun == sdev->lun))
4953 return devip;
4954 else {
4955 if ((!devip->used) && (!open_devip))
4956 open_devip = devip;
4957 }
4958 }
4959 if (!open_devip) { /* try and make a new one */
4960 open_devip = sdebug_device_create(sdbg_host, GFP_ATOMIC);
4961 if (!open_devip) {
4962 pr_err("out of memory at line %d\n", __LINE__);
4963 return NULL;
4964 }
4965 }
4966
4967 open_devip->channel = sdev->channel;
4968 open_devip->target = sdev->id;
4969 open_devip->lun = sdev->lun;
4970 open_devip->sdbg_host = sdbg_host;
4971 atomic_set(&open_devip->num_in_q, 0);
4972 set_bit(SDEBUG_UA_POR, open_devip->uas_bm);
4973 open_devip->used = true;
4974 return open_devip;
4975}
4976
4977static int scsi_debug_slave_alloc(struct scsi_device *sdp)
4978{
4979 if (sdebug_verbose)
4980 pr_info("slave_alloc <%u %u %u %llu>\n",
4981 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
4982 return 0;
4983}
4984
4985static int scsi_debug_slave_configure(struct scsi_device *sdp)
4986{
4987 struct sdebug_dev_info *devip =
4988 (struct sdebug_dev_info *)sdp->hostdata;
4989
4990 if (sdebug_verbose)
4991 pr_info("slave_configure <%u %u %u %llu>\n",
4992 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
4993 if (sdp->host->max_cmd_len != SDEBUG_MAX_CMD_LEN)
4994 sdp->host->max_cmd_len = SDEBUG_MAX_CMD_LEN;
4995 if (devip == NULL) {
4996 devip = find_build_dev_info(sdp);
4997 if (devip == NULL)
4998 return 1; /* no resources, will be marked offline */
4999 }
5000 sdp->hostdata = devip;
5001 if (sdebug_no_uld)
5002 sdp->no_uld_attach = 1;
5003 config_cdb_len(sdp);
5004 return 0;
5005}
5006
5007static void scsi_debug_slave_destroy(struct scsi_device *sdp)
5008{
5009 struct sdebug_dev_info *devip =
5010 (struct sdebug_dev_info *)sdp->hostdata;
5011
5012 if (sdebug_verbose)
5013 pr_info("slave_destroy <%u %u %u %llu>\n",
5014 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
5015 if (devip) {
5016 /* make this slot available for re-use */
5017 devip->used = false;
5018 sdp->hostdata = NULL;
5019 }
5020}
5021
5022static void stop_qc_helper(struct sdebug_defer *sd_dp,
5023 enum sdeb_defer_type defer_t)
5024{
5025 if (!sd_dp)
5026 return;
5027 if (defer_t == SDEB_DEFER_HRT)
5028 hrtimer_cancel(&sd_dp->hrt);
5029 else if (defer_t == SDEB_DEFER_WQ)
5030 cancel_work_sync(&sd_dp->ew.work);
5031}
5032
5033/* If @cmnd found deletes its timer or work queue and returns true; else
5034 returns false */
5035static bool stop_queued_cmnd(struct scsi_cmnd *cmnd)
5036{
5037 unsigned long iflags;
5038 int j, k, qmax, r_qmax;
5039 enum sdeb_defer_type l_defer_t;
5040 struct sdebug_queue *sqp;
5041 struct sdebug_queued_cmd *sqcp;
5042 struct sdebug_dev_info *devip;
5043 struct sdebug_defer *sd_dp;
5044
5045 for (j = 0, sqp = sdebug_q_arr; j < submit_queues; ++j, ++sqp) {
5046 spin_lock_irqsave(&sqp->qc_lock, iflags);
5047 qmax = sdebug_max_queue;
5048 r_qmax = atomic_read(&retired_max_queue);
5049 if (r_qmax > qmax)
5050 qmax = r_qmax;
5051 for (k = 0; k < qmax; ++k) {
5052 if (test_bit(k, sqp->in_use_bm)) {
5053 sqcp = &sqp->qc_arr[k];
5054 if (cmnd != sqcp->a_cmnd)
5055 continue;
5056 /* found */
5057 devip = (struct sdebug_dev_info *)
5058 cmnd->device->hostdata;
5059 if (devip)
5060 atomic_dec(&devip->num_in_q);
5061 sqcp->a_cmnd = NULL;
5062 sd_dp = sqcp->sd_dp;
5063 if (sd_dp) {
5064 l_defer_t = sd_dp->defer_t;
5065 sd_dp->defer_t = SDEB_DEFER_NONE;
5066 } else
5067 l_defer_t = SDEB_DEFER_NONE;
5068 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
5069 stop_qc_helper(sd_dp, l_defer_t);
5070 clear_bit(k, sqp->in_use_bm);
5071 return true;
5072 }
5073 }
5074 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
5075 }
5076 return false;
5077}
5078
5079/* Deletes (stops) timers or work queues of all queued commands */
5080static void stop_all_queued(void)
5081{
5082 unsigned long iflags;
5083 int j, k;
5084 enum sdeb_defer_type l_defer_t;
5085 struct sdebug_queue *sqp;
5086 struct sdebug_queued_cmd *sqcp;
5087 struct sdebug_dev_info *devip;
5088 struct sdebug_defer *sd_dp;
5089
5090 for (j = 0, sqp = sdebug_q_arr; j < submit_queues; ++j, ++sqp) {
5091 spin_lock_irqsave(&sqp->qc_lock, iflags);
5092 for (k = 0; k < SDEBUG_CANQUEUE; ++k) {
5093 if (test_bit(k, sqp->in_use_bm)) {
5094 sqcp = &sqp->qc_arr[k];
5095 if (sqcp->a_cmnd == NULL)
5096 continue;
5097 devip = (struct sdebug_dev_info *)
5098 sqcp->a_cmnd->device->hostdata;
5099 if (devip)
5100 atomic_dec(&devip->num_in_q);
5101 sqcp->a_cmnd = NULL;
5102 sd_dp = sqcp->sd_dp;
5103 if (sd_dp) {
5104 l_defer_t = sd_dp->defer_t;
5105 sd_dp->defer_t = SDEB_DEFER_NONE;
5106 } else
5107 l_defer_t = SDEB_DEFER_NONE;
5108 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
5109 stop_qc_helper(sd_dp, l_defer_t);
5110 clear_bit(k, sqp->in_use_bm);
5111 spin_lock_irqsave(&sqp->qc_lock, iflags);
5112 }
5113 }
5114 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
5115 }
5116}
5117
5118/* Free queued command memory on heap */
5119static void free_all_queued(void)
5120{
5121 int j, k;
5122 struct sdebug_queue *sqp;
5123 struct sdebug_queued_cmd *sqcp;
5124
5125 for (j = 0, sqp = sdebug_q_arr; j < submit_queues; ++j, ++sqp) {
5126 for (k = 0; k < SDEBUG_CANQUEUE; ++k) {
5127 sqcp = &sqp->qc_arr[k];
5128 kfree(sqcp->sd_dp);
5129 sqcp->sd_dp = NULL;
5130 }
5131 }
5132}
5133
5134static int scsi_debug_abort(struct scsi_cmnd *SCpnt)
5135{
5136 bool ok;
5137
5138 ++num_aborts;
5139 if (SCpnt) {
5140 ok = stop_queued_cmnd(SCpnt);
5141 if (SCpnt->device && (SDEBUG_OPT_ALL_NOISE & sdebug_opts))
5142 sdev_printk(KERN_INFO, SCpnt->device,
5143 "%s: command%s found\n", __func__,
5144 ok ? "" : " not");
5145 }
5146 return SUCCESS;
5147}
5148
5149static int scsi_debug_device_reset(struct scsi_cmnd *SCpnt)
5150{
5151 ++num_dev_resets;
5152 if (SCpnt && SCpnt->device) {
5153 struct scsi_device *sdp = SCpnt->device;
5154 struct sdebug_dev_info *devip =
5155 (struct sdebug_dev_info *)sdp->hostdata;
5156
5157 if (SDEBUG_OPT_ALL_NOISE & sdebug_opts)
5158 sdev_printk(KERN_INFO, sdp, "%s\n", __func__);
5159 if (devip)
5160 set_bit(SDEBUG_UA_POR, devip->uas_bm);
5161 }
5162 return SUCCESS;
5163}
5164
5165static int scsi_debug_target_reset(struct scsi_cmnd *SCpnt)
5166{
5167 struct sdebug_host_info *sdbg_host;
5168 struct sdebug_dev_info *devip;
5169 struct scsi_device *sdp;
5170 struct Scsi_Host *hp;
5171 int k = 0;
5172
5173 ++num_target_resets;
5174 if (!SCpnt)
5175 goto lie;
5176 sdp = SCpnt->device;
5177 if (!sdp)
5178 goto lie;
5179 if (SDEBUG_OPT_ALL_NOISE & sdebug_opts)
5180 sdev_printk(KERN_INFO, sdp, "%s\n", __func__);
5181 hp = sdp->host;
5182 if (!hp)
5183 goto lie;
5184 sdbg_host = *(struct sdebug_host_info **)shost_priv(hp);
5185 if (sdbg_host) {
5186 list_for_each_entry(devip,
5187 &sdbg_host->dev_info_list,
5188 dev_list)
5189 if (devip->target == sdp->id) {
5190 set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm);
5191 ++k;
5192 }
5193 }
5194 if (SDEBUG_OPT_RESET_NOISE & sdebug_opts)
5195 sdev_printk(KERN_INFO, sdp,
5196 "%s: %d device(s) found in target\n", __func__, k);
5197lie:
5198 return SUCCESS;
5199}
5200
5201static int scsi_debug_bus_reset(struct scsi_cmnd *SCpnt)
5202{
5203 struct sdebug_host_info *sdbg_host;
5204 struct sdebug_dev_info *devip;
5205 struct scsi_device *sdp;
5206 struct Scsi_Host *hp;
5207 int k = 0;
5208
5209 ++num_bus_resets;
5210 if (!(SCpnt && SCpnt->device))
5211 goto lie;
5212 sdp = SCpnt->device;
5213 if (SDEBUG_OPT_ALL_NOISE & sdebug_opts)
5214 sdev_printk(KERN_INFO, sdp, "%s\n", __func__);
5215 hp = sdp->host;
5216 if (hp) {
5217 sdbg_host = *(struct sdebug_host_info **)shost_priv(hp);
5218 if (sdbg_host) {
5219 list_for_each_entry(devip,
5220 &sdbg_host->dev_info_list,
5221 dev_list) {
5222 set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm);
5223 ++k;
5224 }
5225 }
5226 }
5227 if (SDEBUG_OPT_RESET_NOISE & sdebug_opts)
5228 sdev_printk(KERN_INFO, sdp,
5229 "%s: %d device(s) found in host\n", __func__, k);
5230lie:
5231 return SUCCESS;
5232}
5233
5234static int scsi_debug_host_reset(struct scsi_cmnd *SCpnt)
5235{
5236 struct sdebug_host_info *sdbg_host;
5237 struct sdebug_dev_info *devip;
5238 int k = 0;
5239
5240 ++num_host_resets;
5241 if ((SCpnt->device) && (SDEBUG_OPT_ALL_NOISE & sdebug_opts))
5242 sdev_printk(KERN_INFO, SCpnt->device, "%s\n", __func__);
5243 spin_lock(&sdebug_host_list_lock);
5244 list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) {
5245 list_for_each_entry(devip, &sdbg_host->dev_info_list,
5246 dev_list) {
5247 set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm);
5248 ++k;
5249 }
5250 }
5251 spin_unlock(&sdebug_host_list_lock);
5252 stop_all_queued();
5253 if (SDEBUG_OPT_RESET_NOISE & sdebug_opts)
5254 sdev_printk(KERN_INFO, SCpnt->device,
5255 "%s: %d device(s) found\n", __func__, k);
5256 return SUCCESS;
5257}
5258
5259static void sdebug_build_parts(unsigned char *ramp, unsigned long store_size)
5260{
5261 struct msdos_partition *pp;
5262 int starts[SDEBUG_MAX_PARTS + 2], max_part_secs;
5263 int sectors_per_part, num_sectors, k;
5264 int heads_by_sects, start_sec, end_sec;
5265
5266 /* assume partition table already zeroed */
5267 if ((sdebug_num_parts < 1) || (store_size < 1048576))
5268 return;
5269 if (sdebug_num_parts > SDEBUG_MAX_PARTS) {
5270 sdebug_num_parts = SDEBUG_MAX_PARTS;
5271 pr_warn("reducing partitions to %d\n", SDEBUG_MAX_PARTS);
5272 }
5273 num_sectors = (int)get_sdebug_capacity();
5274 sectors_per_part = (num_sectors - sdebug_sectors_per)
5275 / sdebug_num_parts;
5276 heads_by_sects = sdebug_heads * sdebug_sectors_per;
5277 starts[0] = sdebug_sectors_per;
5278 max_part_secs = sectors_per_part;
5279 for (k = 1; k < sdebug_num_parts; ++k) {
5280 starts[k] = ((k * sectors_per_part) / heads_by_sects)
5281 * heads_by_sects;
5282 if (starts[k] - starts[k - 1] < max_part_secs)
5283 max_part_secs = starts[k] - starts[k - 1];
5284 }
5285 starts[sdebug_num_parts] = num_sectors;
5286 starts[sdebug_num_parts + 1] = 0;
5287
5288 ramp[510] = 0x55; /* magic partition markings */
5289 ramp[511] = 0xAA;
5290 pp = (struct msdos_partition *)(ramp + 0x1be);
5291 for (k = 0; starts[k + 1]; ++k, ++pp) {
5292 start_sec = starts[k];
5293 end_sec = starts[k] + max_part_secs - 1;
5294 pp->boot_ind = 0;
5295
5296 pp->cyl = start_sec / heads_by_sects;
5297 pp->head = (start_sec - (pp->cyl * heads_by_sects))
5298 / sdebug_sectors_per;
5299 pp->sector = (start_sec % sdebug_sectors_per) + 1;
5300
5301 pp->end_cyl = end_sec / heads_by_sects;
5302 pp->end_head = (end_sec - (pp->end_cyl * heads_by_sects))
5303 / sdebug_sectors_per;
5304 pp->end_sector = (end_sec % sdebug_sectors_per) + 1;
5305
5306 pp->start_sect = cpu_to_le32(start_sec);
5307 pp->nr_sects = cpu_to_le32(end_sec - start_sec + 1);
5308 pp->sys_ind = 0x83; /* plain Linux partition */
5309 }
5310}
5311
5312static void block_unblock_all_queues(bool block)
5313{
5314 int j;
5315 struct sdebug_queue *sqp;
5316
5317 for (j = 0, sqp = sdebug_q_arr; j < submit_queues; ++j, ++sqp)
5318 atomic_set(&sqp->blocked, (int)block);
5319}
5320
5321/* Adjust (by rounding down) the sdebug_cmnd_count so abs(every_nth)-1
5322 * commands will be processed normally before triggers occur.
5323 */
5324static void tweak_cmnd_count(void)
5325{
5326 int count, modulo;
5327
5328 modulo = abs(sdebug_every_nth);
5329 if (modulo < 2)
5330 return;
5331 block_unblock_all_queues(true);
5332 count = atomic_read(&sdebug_cmnd_count);
5333 atomic_set(&sdebug_cmnd_count, (count / modulo) * modulo);
5334 block_unblock_all_queues(false);
5335}
5336
5337static void clear_queue_stats(void)
5338{
5339 atomic_set(&sdebug_cmnd_count, 0);
5340 atomic_set(&sdebug_completions, 0);
5341 atomic_set(&sdebug_miss_cpus, 0);
5342 atomic_set(&sdebug_a_tsf, 0);
5343}
5344
5345static bool inject_on_this_cmd(void)
5346{
5347 if (sdebug_every_nth == 0)
5348 return false;
5349 return (atomic_read(&sdebug_cmnd_count) % abs(sdebug_every_nth)) == 0;
5350}
5351
5352#define INCLUSIVE_TIMING_MAX_NS 1000000 /* 1 millisecond */
5353
5354/* Complete the processing of the thread that queued a SCSI command to this
5355 * driver. It either completes the command by calling cmnd_done() or
5356 * schedules a hr timer or work queue then returns 0. Returns
5357 * SCSI_MLQUEUE_HOST_BUSY if temporarily out of resources.
5358 */
5359static int schedule_resp(struct scsi_cmnd *cmnd, struct sdebug_dev_info *devip,
5360 int scsi_result,
5361 int (*pfp)(struct scsi_cmnd *,
5362 struct sdebug_dev_info *),
5363 int delta_jiff, int ndelay)
5364{
5365 bool new_sd_dp;
5366 bool inject = false;
5367 bool hipri = (cmnd->request->cmd_flags & REQ_HIPRI);
5368 int k, num_in_q, qdepth;
5369 unsigned long iflags;
5370 u64 ns_from_boot = 0;
5371 struct sdebug_queue *sqp;
5372 struct sdebug_queued_cmd *sqcp;
5373 struct scsi_device *sdp;
5374 struct sdebug_defer *sd_dp;
5375
5376 if (unlikely(devip == NULL)) {
5377 if (scsi_result == 0)
5378 scsi_result = DID_NO_CONNECT << 16;
5379 goto respond_in_thread;
5380 }
5381 sdp = cmnd->device;
5382
5383 if (delta_jiff == 0)
5384 goto respond_in_thread;
5385
5386 sqp = get_queue(cmnd);
5387 spin_lock_irqsave(&sqp->qc_lock, iflags);
5388 if (unlikely(atomic_read(&sqp->blocked))) {
5389 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
5390 return SCSI_MLQUEUE_HOST_BUSY;
5391 }
5392 num_in_q = atomic_read(&devip->num_in_q);
5393 qdepth = cmnd->device->queue_depth;
5394 if (unlikely((qdepth > 0) && (num_in_q >= qdepth))) {
5395 if (scsi_result) {
5396 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
5397 goto respond_in_thread;
5398 } else
5399 scsi_result = device_qfull_result;
5400 } else if (unlikely(sdebug_every_nth &&
5401 (SDEBUG_OPT_RARE_TSF & sdebug_opts) &&
5402 (scsi_result == 0))) {
5403 if ((num_in_q == (qdepth - 1)) &&
5404 (atomic_inc_return(&sdebug_a_tsf) >=
5405 abs(sdebug_every_nth))) {
5406 atomic_set(&sdebug_a_tsf, 0);
5407 inject = true;
5408 scsi_result = device_qfull_result;
5409 }
5410 }
5411
5412 k = find_first_zero_bit(sqp->in_use_bm, sdebug_max_queue);
5413 if (unlikely(k >= sdebug_max_queue)) {
5414 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
5415 if (scsi_result)
5416 goto respond_in_thread;
5417 else if (SDEBUG_OPT_ALL_TSF & sdebug_opts)
5418 scsi_result = device_qfull_result;
5419 if (SDEBUG_OPT_Q_NOISE & sdebug_opts)
5420 sdev_printk(KERN_INFO, sdp,
5421 "%s: max_queue=%d exceeded, %s\n",
5422 __func__, sdebug_max_queue,
5423 (scsi_result ? "status: TASK SET FULL" :
5424 "report: host busy"));
5425 if (scsi_result)
5426 goto respond_in_thread;
5427 else
5428 return SCSI_MLQUEUE_HOST_BUSY;
5429 }
5430 set_bit(k, sqp->in_use_bm);
5431 atomic_inc(&devip->num_in_q);
5432 sqcp = &sqp->qc_arr[k];
5433 sqcp->a_cmnd = cmnd;
5434 cmnd->host_scribble = (unsigned char *)sqcp;
5435 sd_dp = sqcp->sd_dp;
5436 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
5437
5438 if (!sd_dp) {
5439 sd_dp = kzalloc(sizeof(*sd_dp), GFP_ATOMIC);
5440 if (!sd_dp) {
5441 atomic_dec(&devip->num_in_q);
5442 clear_bit(k, sqp->in_use_bm);
5443 return SCSI_MLQUEUE_HOST_BUSY;
5444 }
5445 new_sd_dp = true;
5446 } else {
5447 new_sd_dp = false;
5448 }
5449
5450 /* Set the hostwide tag */
5451 if (sdebug_host_max_queue)
5452 sd_dp->hc_idx = get_tag(cmnd);
5453
5454 if (hipri)
5455 ns_from_boot = ktime_get_boottime_ns();
5456
5457 /* one of the resp_*() response functions is called here */
5458 cmnd->result = pfp ? pfp(cmnd, devip) : 0;
5459 if (cmnd->result & SDEG_RES_IMMED_MASK) {
5460 cmnd->result &= ~SDEG_RES_IMMED_MASK;
5461 delta_jiff = ndelay = 0;
5462 }
5463 if (cmnd->result == 0 && scsi_result != 0)
5464 cmnd->result = scsi_result;
5465 if (cmnd->result == 0 && unlikely(sdebug_opts & SDEBUG_OPT_TRANSPORT_ERR)) {
5466 if (atomic_read(&sdeb_inject_pending)) {
5467 mk_sense_buffer(cmnd, ABORTED_COMMAND, TRANSPORT_PROBLEM, ACK_NAK_TO);
5468 atomic_set(&sdeb_inject_pending, 0);
5469 cmnd->result = check_condition_result;
5470 }
5471 }
5472
5473 if (unlikely(sdebug_verbose && cmnd->result))
5474 sdev_printk(KERN_INFO, sdp, "%s: non-zero result=0x%x\n",
5475 __func__, cmnd->result);
5476
5477 if (delta_jiff > 0 || ndelay > 0) {
5478 ktime_t kt;
5479
5480 if (delta_jiff > 0) {
5481 u64 ns = jiffies_to_nsecs(delta_jiff);
5482
5483 if (sdebug_random && ns < U32_MAX) {
5484 ns = prandom_u32_max((u32)ns);
5485 } else if (sdebug_random) {
5486 ns >>= 12; /* scale to 4 usec precision */
5487 if (ns < U32_MAX) /* over 4 hours max */
5488 ns = prandom_u32_max((u32)ns);
5489 ns <<= 12;
5490 }
5491 kt = ns_to_ktime(ns);
5492 } else { /* ndelay has a 4.2 second max */
5493 kt = sdebug_random ? prandom_u32_max((u32)ndelay) :
5494 (u32)ndelay;
5495 if (ndelay < INCLUSIVE_TIMING_MAX_NS) {
5496 u64 d = ktime_get_boottime_ns() - ns_from_boot;
5497
5498 if (kt <= d) { /* elapsed duration >= kt */
5499 spin_lock_irqsave(&sqp->qc_lock, iflags);
5500 sqcp->a_cmnd = NULL;
5501 atomic_dec(&devip->num_in_q);
5502 clear_bit(k, sqp->in_use_bm);
5503 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
5504 if (new_sd_dp)
5505 kfree(sd_dp);
5506 /* call scsi_done() from this thread */
5507 cmnd->scsi_done(cmnd);
5508 return 0;
5509 }
5510 /* otherwise reduce kt by elapsed time */
5511 kt -= d;
5512 }
5513 }
5514 if (hipri) {
5515 sd_dp->cmpl_ts = ktime_add(ns_to_ktime(ns_from_boot), kt);
5516 spin_lock_irqsave(&sqp->qc_lock, iflags);
5517 if (!sd_dp->init_poll) {
5518 sd_dp->init_poll = true;
5519 sqcp->sd_dp = sd_dp;
5520 sd_dp->sqa_idx = sqp - sdebug_q_arr;
5521 sd_dp->qc_idx = k;
5522 }
5523 sd_dp->defer_t = SDEB_DEFER_POLL;
5524 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
5525 } else {
5526 if (!sd_dp->init_hrt) {
5527 sd_dp->init_hrt = true;
5528 sqcp->sd_dp = sd_dp;
5529 hrtimer_init(&sd_dp->hrt, CLOCK_MONOTONIC,
5530 HRTIMER_MODE_REL_PINNED);
5531 sd_dp->hrt.function = sdebug_q_cmd_hrt_complete;
5532 sd_dp->sqa_idx = sqp - sdebug_q_arr;
5533 sd_dp->qc_idx = k;
5534 }
5535 sd_dp->defer_t = SDEB_DEFER_HRT;
5536 /* schedule the invocation of scsi_done() for a later time */
5537 hrtimer_start(&sd_dp->hrt, kt, HRTIMER_MODE_REL_PINNED);
5538 }
5539 if (sdebug_statistics)
5540 sd_dp->issuing_cpu = raw_smp_processor_id();
5541 } else { /* jdelay < 0, use work queue */
5542 if (unlikely((sdebug_opts & SDEBUG_OPT_CMD_ABORT) &&
5543 atomic_read(&sdeb_inject_pending)))
5544 sd_dp->aborted = true;
5545 if (hipri) {
5546 sd_dp->cmpl_ts = ns_to_ktime(ns_from_boot);
5547 spin_lock_irqsave(&sqp->qc_lock, iflags);
5548 if (!sd_dp->init_poll) {
5549 sd_dp->init_poll = true;
5550 sqcp->sd_dp = sd_dp;
5551 sd_dp->sqa_idx = sqp - sdebug_q_arr;
5552 sd_dp->qc_idx = k;
5553 }
5554 sd_dp->defer_t = SDEB_DEFER_POLL;
5555 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
5556 } else {
5557 if (!sd_dp->init_wq) {
5558 sd_dp->init_wq = true;
5559 sqcp->sd_dp = sd_dp;
5560 sd_dp->sqa_idx = sqp - sdebug_q_arr;
5561 sd_dp->qc_idx = k;
5562 INIT_WORK(&sd_dp->ew.work, sdebug_q_cmd_wq_complete);
5563 }
5564 sd_dp->defer_t = SDEB_DEFER_WQ;
5565 schedule_work(&sd_dp->ew.work);
5566 }
5567 if (sdebug_statistics)
5568 sd_dp->issuing_cpu = raw_smp_processor_id();
5569 if (unlikely(sd_dp->aborted)) {
5570 sdev_printk(KERN_INFO, sdp, "abort request tag %d\n", cmnd->request->tag);
5571 blk_abort_request(cmnd->request);
5572 atomic_set(&sdeb_inject_pending, 0);
5573 sd_dp->aborted = false;
5574 }
5575 }
5576 if (unlikely((SDEBUG_OPT_Q_NOISE & sdebug_opts) && scsi_result == device_qfull_result))
5577 sdev_printk(KERN_INFO, sdp, "%s: num_in_q=%d +1, %s%s\n", __func__,
5578 num_in_q, (inject ? "<inject> " : ""), "status: TASK SET FULL");
5579 return 0;
5580
5581respond_in_thread: /* call back to mid-layer using invocation thread */
5582 cmnd->result = pfp != NULL ? pfp(cmnd, devip) : 0;
5583 cmnd->result &= ~SDEG_RES_IMMED_MASK;
5584 if (cmnd->result == 0 && scsi_result != 0)
5585 cmnd->result = scsi_result;
5586 cmnd->scsi_done(cmnd);
5587 return 0;
5588}
5589
5590/* Note: The following macros create attribute files in the
5591 /sys/module/scsi_debug/parameters directory. Unfortunately this
5592 driver is unaware of a change and cannot trigger auxiliary actions
5593 as it can when the corresponding attribute in the
5594 /sys/bus/pseudo/drivers/scsi_debug directory is changed.
5595 */
5596module_param_named(add_host, sdebug_add_host, int, S_IRUGO | S_IWUSR);
5597module_param_named(ato, sdebug_ato, int, S_IRUGO);
5598module_param_named(cdb_len, sdebug_cdb_len, int, 0644);
5599module_param_named(clustering, sdebug_clustering, bool, S_IRUGO | S_IWUSR);
5600module_param_named(delay, sdebug_jdelay, int, S_IRUGO | S_IWUSR);
5601module_param_named(dev_size_mb, sdebug_dev_size_mb, int, S_IRUGO);
5602module_param_named(dif, sdebug_dif, int, S_IRUGO);
5603module_param_named(dix, sdebug_dix, int, S_IRUGO);
5604module_param_named(dsense, sdebug_dsense, int, S_IRUGO | S_IWUSR);
5605module_param_named(every_nth, sdebug_every_nth, int, S_IRUGO | S_IWUSR);
5606module_param_named(fake_rw, sdebug_fake_rw, int, S_IRUGO | S_IWUSR);
5607module_param_named(guard, sdebug_guard, uint, S_IRUGO);
5608module_param_named(host_lock, sdebug_host_lock, bool, S_IRUGO | S_IWUSR);
5609module_param_named(host_max_queue, sdebug_host_max_queue, int, S_IRUGO);
5610module_param_string(inq_product, sdebug_inq_product_id,
5611 sizeof(sdebug_inq_product_id), S_IRUGO | S_IWUSR);
5612module_param_string(inq_rev, sdebug_inq_product_rev,
5613 sizeof(sdebug_inq_product_rev), S_IRUGO | S_IWUSR);
5614module_param_string(inq_vendor, sdebug_inq_vendor_id,
5615 sizeof(sdebug_inq_vendor_id), S_IRUGO | S_IWUSR);
5616module_param_named(lbprz, sdebug_lbprz, int, S_IRUGO);
5617module_param_named(lbpu, sdebug_lbpu, int, S_IRUGO);
5618module_param_named(lbpws, sdebug_lbpws, int, S_IRUGO);
5619module_param_named(lbpws10, sdebug_lbpws10, int, S_IRUGO);
5620module_param_named(lowest_aligned, sdebug_lowest_aligned, int, S_IRUGO);
5621module_param_named(lun_format, sdebug_lun_am_i, int, S_IRUGO | S_IWUSR);
5622module_param_named(max_luns, sdebug_max_luns, int, S_IRUGO | S_IWUSR);
5623module_param_named(max_queue, sdebug_max_queue, int, S_IRUGO | S_IWUSR);
5624module_param_named(medium_error_count, sdebug_medium_error_count, int,
5625 S_IRUGO | S_IWUSR);
5626module_param_named(medium_error_start, sdebug_medium_error_start, int,
5627 S_IRUGO | S_IWUSR);
5628module_param_named(ndelay, sdebug_ndelay, int, S_IRUGO | S_IWUSR);
5629module_param_named(no_lun_0, sdebug_no_lun_0, int, S_IRUGO | S_IWUSR);
5630module_param_named(no_uld, sdebug_no_uld, int, S_IRUGO);
5631module_param_named(num_parts, sdebug_num_parts, int, S_IRUGO);
5632module_param_named(num_tgts, sdebug_num_tgts, int, S_IRUGO | S_IWUSR);
5633module_param_named(opt_blks, sdebug_opt_blks, int, S_IRUGO);
5634module_param_named(opt_xferlen_exp, sdebug_opt_xferlen_exp, int, S_IRUGO);
5635module_param_named(opts, sdebug_opts, int, S_IRUGO | S_IWUSR);
5636module_param_named(per_host_store, sdebug_per_host_store, bool,
5637 S_IRUGO | S_IWUSR);
5638module_param_named(physblk_exp, sdebug_physblk_exp, int, S_IRUGO);
5639module_param_named(ptype, sdebug_ptype, int, S_IRUGO | S_IWUSR);
5640module_param_named(random, sdebug_random, bool, S_IRUGO | S_IWUSR);
5641module_param_named(removable, sdebug_removable, bool, S_IRUGO | S_IWUSR);
5642module_param_named(scsi_level, sdebug_scsi_level, int, S_IRUGO);
5643module_param_named(sector_size, sdebug_sector_size, int, S_IRUGO);
5644module_param_named(statistics, sdebug_statistics, bool, S_IRUGO | S_IWUSR);
5645module_param_named(strict, sdebug_strict, bool, S_IRUGO | S_IWUSR);
5646module_param_named(submit_queues, submit_queues, int, S_IRUGO);
5647module_param_named(poll_queues, poll_queues, int, S_IRUGO);
5648module_param_named(tur_ms_to_ready, sdeb_tur_ms_to_ready, int, S_IRUGO);
5649module_param_named(unmap_alignment, sdebug_unmap_alignment, int, S_IRUGO);
5650module_param_named(unmap_granularity, sdebug_unmap_granularity, int, S_IRUGO);
5651module_param_named(unmap_max_blocks, sdebug_unmap_max_blocks, int, S_IRUGO);
5652module_param_named(unmap_max_desc, sdebug_unmap_max_desc, int, S_IRUGO);
5653module_param_named(uuid_ctl, sdebug_uuid_ctl, int, S_IRUGO);
5654module_param_named(virtual_gb, sdebug_virtual_gb, int, S_IRUGO | S_IWUSR);
5655module_param_named(vpd_use_hostno, sdebug_vpd_use_hostno, int,
5656 S_IRUGO | S_IWUSR);
5657module_param_named(wp, sdebug_wp, bool, S_IRUGO | S_IWUSR);
5658module_param_named(write_same_length, sdebug_write_same_length, int,
5659 S_IRUGO | S_IWUSR);
5660module_param_named(zbc, sdeb_zbc_model_s, charp, S_IRUGO);
5661module_param_named(zone_max_open, sdeb_zbc_max_open, int, S_IRUGO);
5662module_param_named(zone_nr_conv, sdeb_zbc_nr_conv, int, S_IRUGO);
5663module_param_named(zone_size_mb, sdeb_zbc_zone_size_mb, int, S_IRUGO);
5664
5665MODULE_AUTHOR("Eric Youngdale + Douglas Gilbert");
5666MODULE_DESCRIPTION("SCSI debug adapter driver");
5667MODULE_LICENSE("GPL");
5668MODULE_VERSION(SDEBUG_VERSION);
5669
5670MODULE_PARM_DESC(add_host, "add n hosts, in sysfs if negative remove host(s) (def=1)");
5671MODULE_PARM_DESC(ato, "application tag ownership: 0=disk 1=host (def=1)");
5672MODULE_PARM_DESC(cdb_len, "suggest CDB lengths to drivers (def=10)");
5673MODULE_PARM_DESC(clustering, "when set enables larger transfers (def=0)");
5674MODULE_PARM_DESC(delay, "response delay (def=1 jiffy); 0:imm, -1,-2:tiny");
5675MODULE_PARM_DESC(dev_size_mb, "size in MiB of ram shared by devs(def=8)");
5676MODULE_PARM_DESC(dif, "data integrity field type: 0-3 (def=0)");
5677MODULE_PARM_DESC(dix, "data integrity extensions mask (def=0)");
5678MODULE_PARM_DESC(dsense, "use descriptor sense format(def=0 -> fixed)");
5679MODULE_PARM_DESC(every_nth, "timeout every nth command(def=0)");
5680MODULE_PARM_DESC(fake_rw, "fake reads/writes instead of copying (def=0)");
5681MODULE_PARM_DESC(guard, "protection checksum: 0=crc, 1=ip (def=0)");
5682MODULE_PARM_DESC(host_lock, "host_lock is ignored (def=0)");
5683MODULE_PARM_DESC(host_max_queue,
5684 "host max # of queued cmds (0 to max(def) [max_queue fixed equal for !0])");
5685MODULE_PARM_DESC(inq_product, "SCSI INQUIRY product string (def=\"scsi_debug\")");
5686MODULE_PARM_DESC(inq_rev, "SCSI INQUIRY revision string (def=\""
5687 SDEBUG_VERSION "\")");
5688MODULE_PARM_DESC(inq_vendor, "SCSI INQUIRY vendor string (def=\"Linux\")");
5689MODULE_PARM_DESC(lbprz,
5690 "on read unmapped LBs return 0 when 1 (def), return 0xff when 2");
5691MODULE_PARM_DESC(lbpu, "enable LBP, support UNMAP command (def=0)");
5692MODULE_PARM_DESC(lbpws, "enable LBP, support WRITE SAME(16) with UNMAP bit (def=0)");
5693MODULE_PARM_DESC(lbpws10, "enable LBP, support WRITE SAME(10) with UNMAP bit (def=0)");
5694MODULE_PARM_DESC(lowest_aligned, "lowest aligned lba (def=0)");
5695MODULE_PARM_DESC(lun_format, "LUN format: 0->peripheral (def); 1 --> flat address method");
5696MODULE_PARM_DESC(max_luns, "number of LUNs per target to simulate(def=1)");
5697MODULE_PARM_DESC(max_queue, "max number of queued commands (1 to max(def))");
5698MODULE_PARM_DESC(medium_error_count, "count of sectors to return follow on MEDIUM error");
5699MODULE_PARM_DESC(medium_error_start, "starting sector number to return MEDIUM error");
5700MODULE_PARM_DESC(ndelay, "response delay in nanoseconds (def=0 -> ignore)");
5701MODULE_PARM_DESC(no_lun_0, "no LU number 0 (def=0 -> have lun 0)");
5702MODULE_PARM_DESC(no_uld, "stop ULD (e.g. sd driver) attaching (def=0))");
5703MODULE_PARM_DESC(num_parts, "number of partitions(def=0)");
5704MODULE_PARM_DESC(num_tgts, "number of targets per host to simulate(def=1)");
5705MODULE_PARM_DESC(opt_blks, "optimal transfer length in blocks (def=1024)");
5706MODULE_PARM_DESC(opt_xferlen_exp, "optimal transfer length granularity exponent (def=physblk_exp)");
5707MODULE_PARM_DESC(opts, "1->noise, 2->medium_err, 4->timeout, 8->recovered_err... (def=0)");
5708MODULE_PARM_DESC(per_host_store, "If set, next positive add_host will get new store (def=0)");
5709MODULE_PARM_DESC(physblk_exp, "physical block exponent (def=0)");
5710MODULE_PARM_DESC(poll_queues, "support for iouring iopoll queues (1 to max(submit_queues - 1))");
5711MODULE_PARM_DESC(ptype, "SCSI peripheral type(def=0[disk])");
5712MODULE_PARM_DESC(random, "If set, uniformly randomize command duration between 0 and delay_in_ns");
5713MODULE_PARM_DESC(removable, "claim to have removable media (def=0)");
5714MODULE_PARM_DESC(scsi_level, "SCSI level to simulate(def=7[SPC-5])");
5715MODULE_PARM_DESC(sector_size, "logical block size in bytes (def=512)");
5716MODULE_PARM_DESC(statistics, "collect statistics on commands, queues (def=0)");
5717MODULE_PARM_DESC(strict, "stricter checks: reserved field in cdb (def=0)");
5718MODULE_PARM_DESC(submit_queues, "support for block multi-queue (def=1)");
5719MODULE_PARM_DESC(tur_ms_to_ready, "TEST UNIT READY millisecs before initial good status (def=0)");
5720MODULE_PARM_DESC(unmap_alignment, "lowest aligned thin provisioning lba (def=0)");
5721MODULE_PARM_DESC(unmap_granularity, "thin provisioning granularity in blocks (def=1)");
5722MODULE_PARM_DESC(unmap_max_blocks, "max # of blocks can be unmapped in one cmd (def=0xffffffff)");
5723MODULE_PARM_DESC(unmap_max_desc, "max # of ranges that can be unmapped in one cmd (def=256)");
5724MODULE_PARM_DESC(uuid_ctl,
5725 "1->use uuid for lu name, 0->don't, 2->all use same (def=0)");
5726MODULE_PARM_DESC(virtual_gb, "virtual gigabyte (GiB) size (def=0 -> use dev_size_mb)");
5727MODULE_PARM_DESC(vpd_use_hostno, "0 -> dev ids ignore hostno (def=1 -> unique dev ids)");
5728MODULE_PARM_DESC(wp, "Write Protect (def=0)");
5729MODULE_PARM_DESC(write_same_length, "Maximum blocks per WRITE SAME cmd (def=0xffff)");
5730MODULE_PARM_DESC(zbc, "'none' [0]; 'aware' [1]; 'managed' [2] (def=0). Can have 'host-' prefix");
5731MODULE_PARM_DESC(zone_max_open, "Maximum number of open zones; [0] for no limit (def=auto)");
5732MODULE_PARM_DESC(zone_nr_conv, "Number of conventional zones (def=1)");
5733MODULE_PARM_DESC(zone_size_mb, "Zone size in MiB (def=auto)");
5734
5735#define SDEBUG_INFO_LEN 256
5736static char sdebug_info[SDEBUG_INFO_LEN];
5737
5738static const char *scsi_debug_info(struct Scsi_Host *shp)
5739{
5740 int k;
5741
5742 k = scnprintf(sdebug_info, SDEBUG_INFO_LEN, "%s: version %s [%s]\n",
5743 my_name, SDEBUG_VERSION, sdebug_version_date);
5744 if (k >= (SDEBUG_INFO_LEN - 1))
5745 return sdebug_info;
5746 scnprintf(sdebug_info + k, SDEBUG_INFO_LEN - k,
5747 " dev_size_mb=%d, opts=0x%x, submit_queues=%d, %s=%d",
5748 sdebug_dev_size_mb, sdebug_opts, submit_queues,
5749 "statistics", (int)sdebug_statistics);
5750 return sdebug_info;
5751}
5752
5753/* 'echo <val> > /proc/scsi/scsi_debug/<host_id>' writes to opts */
5754static int scsi_debug_write_info(struct Scsi_Host *host, char *buffer,
5755 int length)
5756{
5757 char arr[16];
5758 int opts;
5759 int minLen = length > 15 ? 15 : length;
5760
5761 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
5762 return -EACCES;
5763 memcpy(arr, buffer, minLen);
5764 arr[minLen] = '\0';
5765 if (1 != sscanf(arr, "%d", &opts))
5766 return -EINVAL;
5767 sdebug_opts = opts;
5768 sdebug_verbose = !!(SDEBUG_OPT_NOISE & opts);
5769 sdebug_any_injecting_opt = !!(SDEBUG_OPT_ALL_INJECTING & opts);
5770 if (sdebug_every_nth != 0)
5771 tweak_cmnd_count();
5772 return length;
5773}
5774
5775/* Output seen with 'cat /proc/scsi/scsi_debug/<host_id>'. It will be the
5776 * same for each scsi_debug host (if more than one). Some of the counters
5777 * output are not atomics so might be inaccurate in a busy system. */
5778static int scsi_debug_show_info(struct seq_file *m, struct Scsi_Host *host)
5779{
5780 int f, j, l;
5781 struct sdebug_queue *sqp;
5782 struct sdebug_host_info *sdhp;
5783
5784 seq_printf(m, "scsi_debug adapter driver, version %s [%s]\n",
5785 SDEBUG_VERSION, sdebug_version_date);
5786 seq_printf(m, "num_tgts=%d, %ssize=%d MB, opts=0x%x, every_nth=%d\n",
5787 sdebug_num_tgts, "shared (ram) ", sdebug_dev_size_mb,
5788 sdebug_opts, sdebug_every_nth);
5789 seq_printf(m, "delay=%d, ndelay=%d, max_luns=%d, sector_size=%d %s\n",
5790 sdebug_jdelay, sdebug_ndelay, sdebug_max_luns,
5791 sdebug_sector_size, "bytes");
5792 seq_printf(m, "cylinders=%d, heads=%d, sectors=%d, command aborts=%d\n",
5793 sdebug_cylinders_per, sdebug_heads, sdebug_sectors_per,
5794 num_aborts);
5795 seq_printf(m, "RESETs: device=%d, target=%d, bus=%d, host=%d\n",
5796 num_dev_resets, num_target_resets, num_bus_resets,
5797 num_host_resets);
5798 seq_printf(m, "dix_reads=%d, dix_writes=%d, dif_errors=%d\n",
5799 dix_reads, dix_writes, dif_errors);
5800 seq_printf(m, "usec_in_jiffy=%lu, statistics=%d\n", TICK_NSEC / 1000,
5801 sdebug_statistics);
5802 seq_printf(m, "cmnd_count=%d, completions=%d, %s=%d, a_tsf=%d, mq_polls=%d\n",
5803 atomic_read(&sdebug_cmnd_count),
5804 atomic_read(&sdebug_completions),
5805 "miss_cpus", atomic_read(&sdebug_miss_cpus),
5806 atomic_read(&sdebug_a_tsf),
5807 atomic_read(&sdeb_mq_poll_count));
5808
5809 seq_printf(m, "submit_queues=%d\n", submit_queues);
5810 for (j = 0, sqp = sdebug_q_arr; j < submit_queues; ++j, ++sqp) {
5811 seq_printf(m, " queue %d:\n", j);
5812 f = find_first_bit(sqp->in_use_bm, sdebug_max_queue);
5813 if (f != sdebug_max_queue) {
5814 l = find_last_bit(sqp->in_use_bm, sdebug_max_queue);
5815 seq_printf(m, " in_use_bm BUSY: %s: %d,%d\n",
5816 "first,last bits", f, l);
5817 }
5818 }
5819
5820 seq_printf(m, "this host_no=%d\n", host->host_no);
5821 if (!xa_empty(per_store_ap)) {
5822 bool niu;
5823 int idx;
5824 unsigned long l_idx;
5825 struct sdeb_store_info *sip;
5826
5827 seq_puts(m, "\nhost list:\n");
5828 j = 0;
5829 list_for_each_entry(sdhp, &sdebug_host_list, host_list) {
5830 idx = sdhp->si_idx;
5831 seq_printf(m, " %d: host_no=%d, si_idx=%d\n", j,
5832 sdhp->shost->host_no, idx);
5833 ++j;
5834 }
5835 seq_printf(m, "\nper_store array [most_recent_idx=%d]:\n",
5836 sdeb_most_recent_idx);
5837 j = 0;
5838 xa_for_each(per_store_ap, l_idx, sip) {
5839 niu = xa_get_mark(per_store_ap, l_idx,
5840 SDEB_XA_NOT_IN_USE);
5841 idx = (int)l_idx;
5842 seq_printf(m, " %d: idx=%d%s\n", j, idx,
5843 (niu ? " not_in_use" : ""));
5844 ++j;
5845 }
5846 }
5847 return 0;
5848}
5849
5850static ssize_t delay_show(struct device_driver *ddp, char *buf)
5851{
5852 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_jdelay);
5853}
5854/* Returns -EBUSY if jdelay is being changed and commands are queued. The unit
5855 * of delay is jiffies.
5856 */
5857static ssize_t delay_store(struct device_driver *ddp, const char *buf,
5858 size_t count)
5859{
5860 int jdelay, res;
5861
5862 if (count > 0 && sscanf(buf, "%d", &jdelay) == 1) {
5863 res = count;
5864 if (sdebug_jdelay != jdelay) {
5865 int j, k;
5866 struct sdebug_queue *sqp;
5867
5868 block_unblock_all_queues(true);
5869 for (j = 0, sqp = sdebug_q_arr; j < submit_queues;
5870 ++j, ++sqp) {
5871 k = find_first_bit(sqp->in_use_bm,
5872 sdebug_max_queue);
5873 if (k != sdebug_max_queue) {
5874 res = -EBUSY; /* queued commands */
5875 break;
5876 }
5877 }
5878 if (res > 0) {
5879 sdebug_jdelay = jdelay;
5880 sdebug_ndelay = 0;
5881 }
5882 block_unblock_all_queues(false);
5883 }
5884 return res;
5885 }
5886 return -EINVAL;
5887}
5888static DRIVER_ATTR_RW(delay);
5889
5890static ssize_t ndelay_show(struct device_driver *ddp, char *buf)
5891{
5892 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_ndelay);
5893}
5894/* Returns -EBUSY if ndelay is being changed and commands are queued */
5895/* If > 0 and accepted then sdebug_jdelay is set to JDELAY_OVERRIDDEN */
5896static ssize_t ndelay_store(struct device_driver *ddp, const char *buf,
5897 size_t count)
5898{
5899 int ndelay, res;
5900
5901 if ((count > 0) && (1 == sscanf(buf, "%d", &ndelay)) &&
5902 (ndelay >= 0) && (ndelay < (1000 * 1000 * 1000))) {
5903 res = count;
5904 if (sdebug_ndelay != ndelay) {
5905 int j, k;
5906 struct sdebug_queue *sqp;
5907
5908 block_unblock_all_queues(true);
5909 for (j = 0, sqp = sdebug_q_arr; j < submit_queues;
5910 ++j, ++sqp) {
5911 k = find_first_bit(sqp->in_use_bm,
5912 sdebug_max_queue);
5913 if (k != sdebug_max_queue) {
5914 res = -EBUSY; /* queued commands */
5915 break;
5916 }
5917 }
5918 if (res > 0) {
5919 sdebug_ndelay = ndelay;
5920 sdebug_jdelay = ndelay ? JDELAY_OVERRIDDEN
5921 : DEF_JDELAY;
5922 }
5923 block_unblock_all_queues(false);
5924 }
5925 return res;
5926 }
5927 return -EINVAL;
5928}
5929static DRIVER_ATTR_RW(ndelay);
5930
5931static ssize_t opts_show(struct device_driver *ddp, char *buf)
5932{
5933 return scnprintf(buf, PAGE_SIZE, "0x%x\n", sdebug_opts);
5934}
5935
5936static ssize_t opts_store(struct device_driver *ddp, const char *buf,
5937 size_t count)
5938{
5939 int opts;
5940 char work[20];
5941
5942 if (sscanf(buf, "%10s", work) == 1) {
5943 if (strncasecmp(work, "0x", 2) == 0) {
5944 if (kstrtoint(work + 2, 16, &opts) == 0)
5945 goto opts_done;
5946 } else {
5947 if (kstrtoint(work, 10, &opts) == 0)
5948 goto opts_done;
5949 }
5950 }
5951 return -EINVAL;
5952opts_done:
5953 sdebug_opts = opts;
5954 sdebug_verbose = !!(SDEBUG_OPT_NOISE & opts);
5955 sdebug_any_injecting_opt = !!(SDEBUG_OPT_ALL_INJECTING & opts);
5956 tweak_cmnd_count();
5957 return count;
5958}
5959static DRIVER_ATTR_RW(opts);
5960
5961static ssize_t ptype_show(struct device_driver *ddp, char *buf)
5962{
5963 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_ptype);
5964}
5965static ssize_t ptype_store(struct device_driver *ddp, const char *buf,
5966 size_t count)
5967{
5968 int n;
5969
5970 /* Cannot change from or to TYPE_ZBC with sysfs */
5971 if (sdebug_ptype == TYPE_ZBC)
5972 return -EINVAL;
5973
5974 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
5975 if (n == TYPE_ZBC)
5976 return -EINVAL;
5977 sdebug_ptype = n;
5978 return count;
5979 }
5980 return -EINVAL;
5981}
5982static DRIVER_ATTR_RW(ptype);
5983
5984static ssize_t dsense_show(struct device_driver *ddp, char *buf)
5985{
5986 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_dsense);
5987}
5988static ssize_t dsense_store(struct device_driver *ddp, const char *buf,
5989 size_t count)
5990{
5991 int n;
5992
5993 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
5994 sdebug_dsense = n;
5995 return count;
5996 }
5997 return -EINVAL;
5998}
5999static DRIVER_ATTR_RW(dsense);
6000
6001static ssize_t fake_rw_show(struct device_driver *ddp, char *buf)
6002{
6003 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_fake_rw);
6004}
6005static ssize_t fake_rw_store(struct device_driver *ddp, const char *buf,
6006 size_t count)
6007{
6008 int n, idx;
6009
6010 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
6011 bool want_store = (n == 0);
6012 struct sdebug_host_info *sdhp;
6013
6014 n = (n > 0);
6015 sdebug_fake_rw = (sdebug_fake_rw > 0);
6016 if (sdebug_fake_rw == n)
6017 return count; /* not transitioning so do nothing */
6018
6019 if (want_store) { /* 1 --> 0 transition, set up store */
6020 if (sdeb_first_idx < 0) {
6021 idx = sdebug_add_store();
6022 if (idx < 0)
6023 return idx;
6024 } else {
6025 idx = sdeb_first_idx;
6026 xa_clear_mark(per_store_ap, idx,
6027 SDEB_XA_NOT_IN_USE);
6028 }
6029 /* make all hosts use same store */
6030 list_for_each_entry(sdhp, &sdebug_host_list,
6031 host_list) {
6032 if (sdhp->si_idx != idx) {
6033 xa_set_mark(per_store_ap, sdhp->si_idx,
6034 SDEB_XA_NOT_IN_USE);
6035 sdhp->si_idx = idx;
6036 }
6037 }
6038 sdeb_most_recent_idx = idx;
6039 } else { /* 0 --> 1 transition is trigger for shrink */
6040 sdebug_erase_all_stores(true /* apart from first */);
6041 }
6042 sdebug_fake_rw = n;
6043 return count;
6044 }
6045 return -EINVAL;
6046}
6047static DRIVER_ATTR_RW(fake_rw);
6048
6049static ssize_t no_lun_0_show(struct device_driver *ddp, char *buf)
6050{
6051 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_no_lun_0);
6052}
6053static ssize_t no_lun_0_store(struct device_driver *ddp, const char *buf,
6054 size_t count)
6055{
6056 int n;
6057
6058 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
6059 sdebug_no_lun_0 = n;
6060 return count;
6061 }
6062 return -EINVAL;
6063}
6064static DRIVER_ATTR_RW(no_lun_0);
6065
6066static ssize_t num_tgts_show(struct device_driver *ddp, char *buf)
6067{
6068 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_num_tgts);
6069}
6070static ssize_t num_tgts_store(struct device_driver *ddp, const char *buf,
6071 size_t count)
6072{
6073 int n;
6074
6075 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
6076 sdebug_num_tgts = n;
6077 sdebug_max_tgts_luns();
6078 return count;
6079 }
6080 return -EINVAL;
6081}
6082static DRIVER_ATTR_RW(num_tgts);
6083
6084static ssize_t dev_size_mb_show(struct device_driver *ddp, char *buf)
6085{
6086 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_dev_size_mb);
6087}
6088static DRIVER_ATTR_RO(dev_size_mb);
6089
6090static ssize_t per_host_store_show(struct device_driver *ddp, char *buf)
6091{
6092 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_per_host_store);
6093}
6094
6095static ssize_t per_host_store_store(struct device_driver *ddp, const char *buf,
6096 size_t count)
6097{
6098 bool v;
6099
6100 if (kstrtobool(buf, &v))
6101 return -EINVAL;
6102
6103 sdebug_per_host_store = v;
6104 return count;
6105}
6106static DRIVER_ATTR_RW(per_host_store);
6107
6108static ssize_t num_parts_show(struct device_driver *ddp, char *buf)
6109{
6110 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_num_parts);
6111}
6112static DRIVER_ATTR_RO(num_parts);
6113
6114static ssize_t every_nth_show(struct device_driver *ddp, char *buf)
6115{
6116 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_every_nth);
6117}
6118static ssize_t every_nth_store(struct device_driver *ddp, const char *buf,
6119 size_t count)
6120{
6121 int nth;
6122 char work[20];
6123
6124 if (sscanf(buf, "%10s", work) == 1) {
6125 if (strncasecmp(work, "0x", 2) == 0) {
6126 if (kstrtoint(work + 2, 16, &nth) == 0)
6127 goto every_nth_done;
6128 } else {
6129 if (kstrtoint(work, 10, &nth) == 0)
6130 goto every_nth_done;
6131 }
6132 }
6133 return -EINVAL;
6134
6135every_nth_done:
6136 sdebug_every_nth = nth;
6137 if (nth && !sdebug_statistics) {
6138 pr_info("every_nth needs statistics=1, set it\n");
6139 sdebug_statistics = true;
6140 }
6141 tweak_cmnd_count();
6142 return count;
6143}
6144static DRIVER_ATTR_RW(every_nth);
6145
6146static ssize_t lun_format_show(struct device_driver *ddp, char *buf)
6147{
6148 return scnprintf(buf, PAGE_SIZE, "%d\n", (int)sdebug_lun_am);
6149}
6150static ssize_t lun_format_store(struct device_driver *ddp, const char *buf,
6151 size_t count)
6152{
6153 int n;
6154 bool changed;
6155
6156 if (kstrtoint(buf, 0, &n))
6157 return -EINVAL;
6158 if (n >= 0) {
6159 if (n > (int)SAM_LUN_AM_FLAT) {
6160 pr_warn("only LUN address methods 0 and 1 are supported\n");
6161 return -EINVAL;
6162 }
6163 changed = ((int)sdebug_lun_am != n);
6164 sdebug_lun_am = n;
6165 if (changed && sdebug_scsi_level >= 5) { /* >= SPC-3 */
6166 struct sdebug_host_info *sdhp;
6167 struct sdebug_dev_info *dp;
6168
6169 spin_lock(&sdebug_host_list_lock);
6170 list_for_each_entry(sdhp, &sdebug_host_list, host_list) {
6171 list_for_each_entry(dp, &sdhp->dev_info_list, dev_list) {
6172 set_bit(SDEBUG_UA_LUNS_CHANGED, dp->uas_bm);
6173 }
6174 }
6175 spin_unlock(&sdebug_host_list_lock);
6176 }
6177 return count;
6178 }
6179 return -EINVAL;
6180}
6181static DRIVER_ATTR_RW(lun_format);
6182
6183static ssize_t max_luns_show(struct device_driver *ddp, char *buf)
6184{
6185 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_max_luns);
6186}
6187static ssize_t max_luns_store(struct device_driver *ddp, const char *buf,
6188 size_t count)
6189{
6190 int n;
6191 bool changed;
6192
6193 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
6194 if (n > 256) {
6195 pr_warn("max_luns can be no more than 256\n");
6196 return -EINVAL;
6197 }
6198 changed = (sdebug_max_luns != n);
6199 sdebug_max_luns = n;
6200 sdebug_max_tgts_luns();
6201 if (changed && (sdebug_scsi_level >= 5)) { /* >= SPC-3 */
6202 struct sdebug_host_info *sdhp;
6203 struct sdebug_dev_info *dp;
6204
6205 spin_lock(&sdebug_host_list_lock);
6206 list_for_each_entry(sdhp, &sdebug_host_list,
6207 host_list) {
6208 list_for_each_entry(dp, &sdhp->dev_info_list,
6209 dev_list) {
6210 set_bit(SDEBUG_UA_LUNS_CHANGED,
6211 dp->uas_bm);
6212 }
6213 }
6214 spin_unlock(&sdebug_host_list_lock);
6215 }
6216 return count;
6217 }
6218 return -EINVAL;
6219}
6220static DRIVER_ATTR_RW(max_luns);
6221
6222static ssize_t max_queue_show(struct device_driver *ddp, char *buf)
6223{
6224 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_max_queue);
6225}
6226/* N.B. max_queue can be changed while there are queued commands. In flight
6227 * commands beyond the new max_queue will be completed. */
6228static ssize_t max_queue_store(struct device_driver *ddp, const char *buf,
6229 size_t count)
6230{
6231 int j, n, k, a;
6232 struct sdebug_queue *sqp;
6233
6234 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n > 0) &&
6235 (n <= SDEBUG_CANQUEUE) &&
6236 (sdebug_host_max_queue == 0)) {
6237 block_unblock_all_queues(true);
6238 k = 0;
6239 for (j = 0, sqp = sdebug_q_arr; j < submit_queues;
6240 ++j, ++sqp) {
6241 a = find_last_bit(sqp->in_use_bm, SDEBUG_CANQUEUE);
6242 if (a > k)
6243 k = a;
6244 }
6245 sdebug_max_queue = n;
6246 if (k == SDEBUG_CANQUEUE)
6247 atomic_set(&retired_max_queue, 0);
6248 else if (k >= n)
6249 atomic_set(&retired_max_queue, k + 1);
6250 else
6251 atomic_set(&retired_max_queue, 0);
6252 block_unblock_all_queues(false);
6253 return count;
6254 }
6255 return -EINVAL;
6256}
6257static DRIVER_ATTR_RW(max_queue);
6258
6259static ssize_t host_max_queue_show(struct device_driver *ddp, char *buf)
6260{
6261 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_host_max_queue);
6262}
6263
6264/*
6265 * Since this is used for .can_queue, and we get the hc_idx tag from the bitmap
6266 * in range [0, sdebug_host_max_queue), we can't change it.
6267 */
6268static DRIVER_ATTR_RO(host_max_queue);
6269
6270static ssize_t no_uld_show(struct device_driver *ddp, char *buf)
6271{
6272 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_no_uld);
6273}
6274static DRIVER_ATTR_RO(no_uld);
6275
6276static ssize_t scsi_level_show(struct device_driver *ddp, char *buf)
6277{
6278 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_scsi_level);
6279}
6280static DRIVER_ATTR_RO(scsi_level);
6281
6282static ssize_t virtual_gb_show(struct device_driver *ddp, char *buf)
6283{
6284 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_virtual_gb);
6285}
6286static ssize_t virtual_gb_store(struct device_driver *ddp, const char *buf,
6287 size_t count)
6288{
6289 int n;
6290 bool changed;
6291
6292 /* Ignore capacity change for ZBC drives for now */
6293 if (sdeb_zbc_in_use)
6294 return -ENOTSUPP;
6295
6296 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
6297 changed = (sdebug_virtual_gb != n);
6298 sdebug_virtual_gb = n;
6299 sdebug_capacity = get_sdebug_capacity();
6300 if (changed) {
6301 struct sdebug_host_info *sdhp;
6302 struct sdebug_dev_info *dp;
6303
6304 spin_lock(&sdebug_host_list_lock);
6305 list_for_each_entry(sdhp, &sdebug_host_list,
6306 host_list) {
6307 list_for_each_entry(dp, &sdhp->dev_info_list,
6308 dev_list) {
6309 set_bit(SDEBUG_UA_CAPACITY_CHANGED,
6310 dp->uas_bm);
6311 }
6312 }
6313 spin_unlock(&sdebug_host_list_lock);
6314 }
6315 return count;
6316 }
6317 return -EINVAL;
6318}
6319static DRIVER_ATTR_RW(virtual_gb);
6320
6321static ssize_t add_host_show(struct device_driver *ddp, char *buf)
6322{
6323 /* absolute number of hosts currently active is what is shown */
6324 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_num_hosts);
6325}
6326
6327static ssize_t add_host_store(struct device_driver *ddp, const char *buf,
6328 size_t count)
6329{
6330 bool found;
6331 unsigned long idx;
6332 struct sdeb_store_info *sip;
6333 bool want_phs = (sdebug_fake_rw == 0) && sdebug_per_host_store;
6334 int delta_hosts;
6335
6336 if (sscanf(buf, "%d", &delta_hosts) != 1)
6337 return -EINVAL;
6338 if (delta_hosts > 0) {
6339 do {
6340 found = false;
6341 if (want_phs) {
6342 xa_for_each_marked(per_store_ap, idx, sip,
6343 SDEB_XA_NOT_IN_USE) {
6344 sdeb_most_recent_idx = (int)idx;
6345 found = true;
6346 break;
6347 }
6348 if (found) /* re-use case */
6349 sdebug_add_host_helper((int)idx);
6350 else
6351 sdebug_do_add_host(true);
6352 } else {
6353 sdebug_do_add_host(false);
6354 }
6355 } while (--delta_hosts);
6356 } else if (delta_hosts < 0) {
6357 do {
6358 sdebug_do_remove_host(false);
6359 } while (++delta_hosts);
6360 }
6361 return count;
6362}
6363static DRIVER_ATTR_RW(add_host);
6364
6365static ssize_t vpd_use_hostno_show(struct device_driver *ddp, char *buf)
6366{
6367 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_vpd_use_hostno);
6368}
6369static ssize_t vpd_use_hostno_store(struct device_driver *ddp, const char *buf,
6370 size_t count)
6371{
6372 int n;
6373
6374 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
6375 sdebug_vpd_use_hostno = n;
6376 return count;
6377 }
6378 return -EINVAL;
6379}
6380static DRIVER_ATTR_RW(vpd_use_hostno);
6381
6382static ssize_t statistics_show(struct device_driver *ddp, char *buf)
6383{
6384 return scnprintf(buf, PAGE_SIZE, "%d\n", (int)sdebug_statistics);
6385}
6386static ssize_t statistics_store(struct device_driver *ddp, const char *buf,
6387 size_t count)
6388{
6389 int n;
6390
6391 if ((count > 0) && (sscanf(buf, "%d", &n) == 1) && (n >= 0)) {
6392 if (n > 0)
6393 sdebug_statistics = true;
6394 else {
6395 clear_queue_stats();
6396 sdebug_statistics = false;
6397 }
6398 return count;
6399 }
6400 return -EINVAL;
6401}
6402static DRIVER_ATTR_RW(statistics);
6403
6404static ssize_t sector_size_show(struct device_driver *ddp, char *buf)
6405{
6406 return scnprintf(buf, PAGE_SIZE, "%u\n", sdebug_sector_size);
6407}
6408static DRIVER_ATTR_RO(sector_size);
6409
6410static ssize_t submit_queues_show(struct device_driver *ddp, char *buf)
6411{
6412 return scnprintf(buf, PAGE_SIZE, "%d\n", submit_queues);
6413}
6414static DRIVER_ATTR_RO(submit_queues);
6415
6416static ssize_t dix_show(struct device_driver *ddp, char *buf)
6417{
6418 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_dix);
6419}
6420static DRIVER_ATTR_RO(dix);
6421
6422static ssize_t dif_show(struct device_driver *ddp, char *buf)
6423{
6424 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_dif);
6425}
6426static DRIVER_ATTR_RO(dif);
6427
6428static ssize_t guard_show(struct device_driver *ddp, char *buf)
6429{
6430 return scnprintf(buf, PAGE_SIZE, "%u\n", sdebug_guard);
6431}
6432static DRIVER_ATTR_RO(guard);
6433
6434static ssize_t ato_show(struct device_driver *ddp, char *buf)
6435{
6436 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_ato);
6437}
6438static DRIVER_ATTR_RO(ato);
6439
6440static ssize_t map_show(struct device_driver *ddp, char *buf)
6441{
6442 ssize_t count = 0;
6443
6444 if (!scsi_debug_lbp())
6445 return scnprintf(buf, PAGE_SIZE, "0-%u\n",
6446 sdebug_store_sectors);
6447
6448 if (sdebug_fake_rw == 0 && !xa_empty(per_store_ap)) {
6449 struct sdeb_store_info *sip = xa_load(per_store_ap, 0);
6450
6451 if (sip)
6452 count = scnprintf(buf, PAGE_SIZE - 1, "%*pbl",
6453 (int)map_size, sip->map_storep);
6454 }
6455 buf[count++] = '\n';
6456 buf[count] = '\0';
6457
6458 return count;
6459}
6460static DRIVER_ATTR_RO(map);
6461
6462static ssize_t random_show(struct device_driver *ddp, char *buf)
6463{
6464 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_random);
6465}
6466
6467static ssize_t random_store(struct device_driver *ddp, const char *buf,
6468 size_t count)
6469{
6470 bool v;
6471
6472 if (kstrtobool(buf, &v))
6473 return -EINVAL;
6474
6475 sdebug_random = v;
6476 return count;
6477}
6478static DRIVER_ATTR_RW(random);
6479
6480static ssize_t removable_show(struct device_driver *ddp, char *buf)
6481{
6482 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_removable ? 1 : 0);
6483}
6484static ssize_t removable_store(struct device_driver *ddp, const char *buf,
6485 size_t count)
6486{
6487 int n;
6488
6489 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
6490 sdebug_removable = (n > 0);
6491 return count;
6492 }
6493 return -EINVAL;
6494}
6495static DRIVER_ATTR_RW(removable);
6496
6497static ssize_t host_lock_show(struct device_driver *ddp, char *buf)
6498{
6499 return scnprintf(buf, PAGE_SIZE, "%d\n", !!sdebug_host_lock);
6500}
6501/* N.B. sdebug_host_lock does nothing, kept for backward compatibility */
6502static ssize_t host_lock_store(struct device_driver *ddp, const char *buf,
6503 size_t count)
6504{
6505 int n;
6506
6507 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
6508 sdebug_host_lock = (n > 0);
6509 return count;
6510 }
6511 return -EINVAL;
6512}
6513static DRIVER_ATTR_RW(host_lock);
6514
6515static ssize_t strict_show(struct device_driver *ddp, char *buf)
6516{
6517 return scnprintf(buf, PAGE_SIZE, "%d\n", !!sdebug_strict);
6518}
6519static ssize_t strict_store(struct device_driver *ddp, const char *buf,
6520 size_t count)
6521{
6522 int n;
6523
6524 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
6525 sdebug_strict = (n > 0);
6526 return count;
6527 }
6528 return -EINVAL;
6529}
6530static DRIVER_ATTR_RW(strict);
6531
6532static ssize_t uuid_ctl_show(struct device_driver *ddp, char *buf)
6533{
6534 return scnprintf(buf, PAGE_SIZE, "%d\n", !!sdebug_uuid_ctl);
6535}
6536static DRIVER_ATTR_RO(uuid_ctl);
6537
6538static ssize_t cdb_len_show(struct device_driver *ddp, char *buf)
6539{
6540 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_cdb_len);
6541}
6542static ssize_t cdb_len_store(struct device_driver *ddp, const char *buf,
6543 size_t count)
6544{
6545 int ret, n;
6546
6547 ret = kstrtoint(buf, 0, &n);
6548 if (ret)
6549 return ret;
6550 sdebug_cdb_len = n;
6551 all_config_cdb_len();
6552 return count;
6553}
6554static DRIVER_ATTR_RW(cdb_len);
6555
6556static const char * const zbc_model_strs_a[] = {
6557 [BLK_ZONED_NONE] = "none",
6558 [BLK_ZONED_HA] = "host-aware",
6559 [BLK_ZONED_HM] = "host-managed",
6560};
6561
6562static const char * const zbc_model_strs_b[] = {
6563 [BLK_ZONED_NONE] = "no",
6564 [BLK_ZONED_HA] = "aware",
6565 [BLK_ZONED_HM] = "managed",
6566};
6567
6568static const char * const zbc_model_strs_c[] = {
6569 [BLK_ZONED_NONE] = "0",
6570 [BLK_ZONED_HA] = "1",
6571 [BLK_ZONED_HM] = "2",
6572};
6573
6574static int sdeb_zbc_model_str(const char *cp)
6575{
6576 int res = sysfs_match_string(zbc_model_strs_a, cp);
6577
6578 if (res < 0) {
6579 res = sysfs_match_string(zbc_model_strs_b, cp);
6580 if (res < 0) {
6581 res = sysfs_match_string(zbc_model_strs_c, cp);
6582 if (res < 0)
6583 return -EINVAL;
6584 }
6585 }
6586 return res;
6587}
6588
6589static ssize_t zbc_show(struct device_driver *ddp, char *buf)
6590{
6591 return scnprintf(buf, PAGE_SIZE, "%s\n",
6592 zbc_model_strs_a[sdeb_zbc_model]);
6593}
6594static DRIVER_ATTR_RO(zbc);
6595
6596static ssize_t tur_ms_to_ready_show(struct device_driver *ddp, char *buf)
6597{
6598 return scnprintf(buf, PAGE_SIZE, "%d\n", sdeb_tur_ms_to_ready);
6599}
6600static DRIVER_ATTR_RO(tur_ms_to_ready);
6601
6602/* Note: The following array creates attribute files in the
6603 /sys/bus/pseudo/drivers/scsi_debug directory. The advantage of these
6604 files (over those found in the /sys/module/scsi_debug/parameters
6605 directory) is that auxiliary actions can be triggered when an attribute
6606 is changed. For example see: add_host_store() above.
6607 */
6608
6609static struct attribute *sdebug_drv_attrs[] = {
6610 &driver_attr_delay.attr,
6611 &driver_attr_opts.attr,
6612 &driver_attr_ptype.attr,
6613 &driver_attr_dsense.attr,
6614 &driver_attr_fake_rw.attr,
6615 &driver_attr_host_max_queue.attr,
6616 &driver_attr_no_lun_0.attr,
6617 &driver_attr_num_tgts.attr,
6618 &driver_attr_dev_size_mb.attr,
6619 &driver_attr_num_parts.attr,
6620 &driver_attr_every_nth.attr,
6621 &driver_attr_lun_format.attr,
6622 &driver_attr_max_luns.attr,
6623 &driver_attr_max_queue.attr,
6624 &driver_attr_no_uld.attr,
6625 &driver_attr_scsi_level.attr,
6626 &driver_attr_virtual_gb.attr,
6627 &driver_attr_add_host.attr,
6628 &driver_attr_per_host_store.attr,
6629 &driver_attr_vpd_use_hostno.attr,
6630 &driver_attr_sector_size.attr,
6631 &driver_attr_statistics.attr,
6632 &driver_attr_submit_queues.attr,
6633 &driver_attr_dix.attr,
6634 &driver_attr_dif.attr,
6635 &driver_attr_guard.attr,
6636 &driver_attr_ato.attr,
6637 &driver_attr_map.attr,
6638 &driver_attr_random.attr,
6639 &driver_attr_removable.attr,
6640 &driver_attr_host_lock.attr,
6641 &driver_attr_ndelay.attr,
6642 &driver_attr_strict.attr,
6643 &driver_attr_uuid_ctl.attr,
6644 &driver_attr_cdb_len.attr,
6645 &driver_attr_tur_ms_to_ready.attr,
6646 &driver_attr_zbc.attr,
6647 NULL,
6648};
6649ATTRIBUTE_GROUPS(sdebug_drv);
6650
6651static struct device *pseudo_primary;
6652
6653static int __init scsi_debug_init(void)
6654{
6655 bool want_store = (sdebug_fake_rw == 0);
6656 unsigned long sz;
6657 int k, ret, hosts_to_add;
6658 int idx = -1;
6659
6660 ramdisk_lck_a[0] = &atomic_rw;
6661 ramdisk_lck_a[1] = &atomic_rw2;
6662 atomic_set(&retired_max_queue, 0);
6663
6664 if (sdebug_ndelay >= 1000 * 1000 * 1000) {
6665 pr_warn("ndelay must be less than 1 second, ignored\n");
6666 sdebug_ndelay = 0;
6667 } else if (sdebug_ndelay > 0)
6668 sdebug_jdelay = JDELAY_OVERRIDDEN;
6669
6670 switch (sdebug_sector_size) {
6671 case 512:
6672 case 1024:
6673 case 2048:
6674 case 4096:
6675 break;
6676 default:
6677 pr_err("invalid sector_size %d\n", sdebug_sector_size);
6678 return -EINVAL;
6679 }
6680
6681 switch (sdebug_dif) {
6682 case T10_PI_TYPE0_PROTECTION:
6683 break;
6684 case T10_PI_TYPE1_PROTECTION:
6685 case T10_PI_TYPE2_PROTECTION:
6686 case T10_PI_TYPE3_PROTECTION:
6687 have_dif_prot = true;
6688 break;
6689
6690 default:
6691 pr_err("dif must be 0, 1, 2 or 3\n");
6692 return -EINVAL;
6693 }
6694
6695 if (sdebug_num_tgts < 0) {
6696 pr_err("num_tgts must be >= 0\n");
6697 return -EINVAL;
6698 }
6699
6700 if (sdebug_guard > 1) {
6701 pr_err("guard must be 0 or 1\n");
6702 return -EINVAL;
6703 }
6704
6705 if (sdebug_ato > 1) {
6706 pr_err("ato must be 0 or 1\n");
6707 return -EINVAL;
6708 }
6709
6710 if (sdebug_physblk_exp > 15) {
6711 pr_err("invalid physblk_exp %u\n", sdebug_physblk_exp);
6712 return -EINVAL;
6713 }
6714
6715 sdebug_lun_am = sdebug_lun_am_i;
6716 if (sdebug_lun_am > SAM_LUN_AM_FLAT) {
6717 pr_warn("Invalid LUN format %u, using default\n", (int)sdebug_lun_am);
6718 sdebug_lun_am = SAM_LUN_AM_PERIPHERAL;
6719 }
6720
6721 if (sdebug_max_luns > 256) {
6722 if (sdebug_max_luns > 16384) {
6723 pr_warn("max_luns can be no more than 16384, use default\n");
6724 sdebug_max_luns = DEF_MAX_LUNS;
6725 }
6726 sdebug_lun_am = SAM_LUN_AM_FLAT;
6727 }
6728
6729 if (sdebug_lowest_aligned > 0x3fff) {
6730 pr_err("lowest_aligned too big: %u\n", sdebug_lowest_aligned);
6731 return -EINVAL;
6732 }
6733
6734 if (submit_queues < 1) {
6735 pr_err("submit_queues must be 1 or more\n");
6736 return -EINVAL;
6737 }
6738
6739 if ((sdebug_max_queue > SDEBUG_CANQUEUE) || (sdebug_max_queue < 1)) {
6740 pr_err("max_queue must be in range [1, %d]\n", SDEBUG_CANQUEUE);
6741 return -EINVAL;
6742 }
6743
6744 if ((sdebug_host_max_queue > SDEBUG_CANQUEUE) ||
6745 (sdebug_host_max_queue < 0)) {
6746 pr_err("host_max_queue must be in range [0 %d]\n",
6747 SDEBUG_CANQUEUE);
6748 return -EINVAL;
6749 }
6750
6751 if (sdebug_host_max_queue &&
6752 (sdebug_max_queue != sdebug_host_max_queue)) {
6753 sdebug_max_queue = sdebug_host_max_queue;
6754 pr_warn("fixing max submit queue depth to host max queue depth, %d\n",
6755 sdebug_max_queue);
6756 }
6757
6758 sdebug_q_arr = kcalloc(submit_queues, sizeof(struct sdebug_queue),
6759 GFP_KERNEL);
6760 if (sdebug_q_arr == NULL)
6761 return -ENOMEM;
6762 for (k = 0; k < submit_queues; ++k)
6763 spin_lock_init(&sdebug_q_arr[k].qc_lock);
6764
6765 /*
6766 * check for host managed zoned block device specified with
6767 * ptype=0x14 or zbc=XXX.
6768 */
6769 if (sdebug_ptype == TYPE_ZBC) {
6770 sdeb_zbc_model = BLK_ZONED_HM;
6771 } else if (sdeb_zbc_model_s && *sdeb_zbc_model_s) {
6772 k = sdeb_zbc_model_str(sdeb_zbc_model_s);
6773 if (k < 0) {
6774 ret = k;
6775 goto free_q_arr;
6776 }
6777 sdeb_zbc_model = k;
6778 switch (sdeb_zbc_model) {
6779 case BLK_ZONED_NONE:
6780 case BLK_ZONED_HA:
6781 sdebug_ptype = TYPE_DISK;
6782 break;
6783 case BLK_ZONED_HM:
6784 sdebug_ptype = TYPE_ZBC;
6785 break;
6786 default:
6787 pr_err("Invalid ZBC model\n");
6788 ret = -EINVAL;
6789 goto free_q_arr;
6790 }
6791 }
6792 if (sdeb_zbc_model != BLK_ZONED_NONE) {
6793 sdeb_zbc_in_use = true;
6794 if (sdebug_dev_size_mb == DEF_DEV_SIZE_PRE_INIT)
6795 sdebug_dev_size_mb = DEF_ZBC_DEV_SIZE_MB;
6796 }
6797
6798 if (sdebug_dev_size_mb == DEF_DEV_SIZE_PRE_INIT)
6799 sdebug_dev_size_mb = DEF_DEV_SIZE_MB;
6800 if (sdebug_dev_size_mb < 1)
6801 sdebug_dev_size_mb = 1; /* force minimum 1 MB ramdisk */
6802 sz = (unsigned long)sdebug_dev_size_mb * 1048576;
6803 sdebug_store_sectors = sz / sdebug_sector_size;
6804 sdebug_capacity = get_sdebug_capacity();
6805
6806 /* play around with geometry, don't waste too much on track 0 */
6807 sdebug_heads = 8;
6808 sdebug_sectors_per = 32;
6809 if (sdebug_dev_size_mb >= 256)
6810 sdebug_heads = 64;
6811 else if (sdebug_dev_size_mb >= 16)
6812 sdebug_heads = 32;
6813 sdebug_cylinders_per = (unsigned long)sdebug_capacity /
6814 (sdebug_sectors_per * sdebug_heads);
6815 if (sdebug_cylinders_per >= 1024) {
6816 /* other LLDs do this; implies >= 1GB ram disk ... */
6817 sdebug_heads = 255;
6818 sdebug_sectors_per = 63;
6819 sdebug_cylinders_per = (unsigned long)sdebug_capacity /
6820 (sdebug_sectors_per * sdebug_heads);
6821 }
6822 if (scsi_debug_lbp()) {
6823 sdebug_unmap_max_blocks =
6824 clamp(sdebug_unmap_max_blocks, 0U, 0xffffffffU);
6825
6826 sdebug_unmap_max_desc =
6827 clamp(sdebug_unmap_max_desc, 0U, 256U);
6828
6829 sdebug_unmap_granularity =
6830 clamp(sdebug_unmap_granularity, 1U, 0xffffffffU);
6831
6832 if (sdebug_unmap_alignment &&
6833 sdebug_unmap_granularity <=
6834 sdebug_unmap_alignment) {
6835 pr_err("ERR: unmap_granularity <= unmap_alignment\n");
6836 ret = -EINVAL;
6837 goto free_q_arr;
6838 }
6839 }
6840 xa_init_flags(per_store_ap, XA_FLAGS_ALLOC | XA_FLAGS_LOCK_IRQ);
6841 if (want_store) {
6842 idx = sdebug_add_store();
6843 if (idx < 0) {
6844 ret = idx;
6845 goto free_q_arr;
6846 }
6847 }
6848
6849 pseudo_primary = root_device_register("pseudo_0");
6850 if (IS_ERR(pseudo_primary)) {
6851 pr_warn("root_device_register() error\n");
6852 ret = PTR_ERR(pseudo_primary);
6853 goto free_vm;
6854 }
6855 ret = bus_register(&pseudo_lld_bus);
6856 if (ret < 0) {
6857 pr_warn("bus_register error: %d\n", ret);
6858 goto dev_unreg;
6859 }
6860 ret = driver_register(&sdebug_driverfs_driver);
6861 if (ret < 0) {
6862 pr_warn("driver_register error: %d\n", ret);
6863 goto bus_unreg;
6864 }
6865
6866 hosts_to_add = sdebug_add_host;
6867 sdebug_add_host = 0;
6868
6869 for (k = 0; k < hosts_to_add; k++) {
6870 if (want_store && k == 0) {
6871 ret = sdebug_add_host_helper(idx);
6872 if (ret < 0) {
6873 pr_err("add_host_helper k=%d, error=%d\n",
6874 k, -ret);
6875 break;
6876 }
6877 } else {
6878 ret = sdebug_do_add_host(want_store &&
6879 sdebug_per_host_store);
6880 if (ret < 0) {
6881 pr_err("add_host k=%d error=%d\n", k, -ret);
6882 break;
6883 }
6884 }
6885 }
6886 if (sdebug_verbose)
6887 pr_info("built %d host(s)\n", sdebug_num_hosts);
6888
6889 return 0;
6890
6891bus_unreg:
6892 bus_unregister(&pseudo_lld_bus);
6893dev_unreg:
6894 root_device_unregister(pseudo_primary);
6895free_vm:
6896 sdebug_erase_store(idx, NULL);
6897free_q_arr:
6898 kfree(sdebug_q_arr);
6899 return ret;
6900}
6901
6902static void __exit scsi_debug_exit(void)
6903{
6904 int k = sdebug_num_hosts;
6905
6906 stop_all_queued();
6907 for (; k; k--)
6908 sdebug_do_remove_host(true);
6909 free_all_queued();
6910 driver_unregister(&sdebug_driverfs_driver);
6911 bus_unregister(&pseudo_lld_bus);
6912 root_device_unregister(pseudo_primary);
6913
6914 sdebug_erase_all_stores(false);
6915 xa_destroy(per_store_ap);
6916 kfree(sdebug_q_arr);
6917}
6918
6919device_initcall(scsi_debug_init);
6920module_exit(scsi_debug_exit);
6921
6922static void sdebug_release_adapter(struct device *dev)
6923{
6924 struct sdebug_host_info *sdbg_host;
6925
6926 sdbg_host = to_sdebug_host(dev);
6927 kfree(sdbg_host);
6928}
6929
6930/* idx must be valid, if sip is NULL then it will be obtained using idx */
6931static void sdebug_erase_store(int idx, struct sdeb_store_info *sip)
6932{
6933 if (idx < 0)
6934 return;
6935 if (!sip) {
6936 if (xa_empty(per_store_ap))
6937 return;
6938 sip = xa_load(per_store_ap, idx);
6939 if (!sip)
6940 return;
6941 }
6942 vfree(sip->map_storep);
6943 vfree(sip->dif_storep);
6944 vfree(sip->storep);
6945 xa_erase(per_store_ap, idx);
6946 kfree(sip);
6947}
6948
6949/* Assume apart_from_first==false only in shutdown case. */
6950static void sdebug_erase_all_stores(bool apart_from_first)
6951{
6952 unsigned long idx;
6953 struct sdeb_store_info *sip = NULL;
6954
6955 xa_for_each(per_store_ap, idx, sip) {
6956 if (apart_from_first)
6957 apart_from_first = false;
6958 else
6959 sdebug_erase_store(idx, sip);
6960 }
6961 if (apart_from_first)
6962 sdeb_most_recent_idx = sdeb_first_idx;
6963}
6964
6965/*
6966 * Returns store xarray new element index (idx) if >=0 else negated errno.
6967 * Limit the number of stores to 65536.
6968 */
6969static int sdebug_add_store(void)
6970{
6971 int res;
6972 u32 n_idx;
6973 unsigned long iflags;
6974 unsigned long sz = (unsigned long)sdebug_dev_size_mb * 1048576;
6975 struct sdeb_store_info *sip = NULL;
6976 struct xa_limit xal = { .max = 1 << 16, .min = 0 };
6977
6978 sip = kzalloc(sizeof(*sip), GFP_KERNEL);
6979 if (!sip)
6980 return -ENOMEM;
6981
6982 xa_lock_irqsave(per_store_ap, iflags);
6983 res = __xa_alloc(per_store_ap, &n_idx, sip, xal, GFP_ATOMIC);
6984 if (unlikely(res < 0)) {
6985 xa_unlock_irqrestore(per_store_ap, iflags);
6986 kfree(sip);
6987 pr_warn("%s: xa_alloc() errno=%d\n", __func__, -res);
6988 return res;
6989 }
6990 sdeb_most_recent_idx = n_idx;
6991 if (sdeb_first_idx < 0)
6992 sdeb_first_idx = n_idx;
6993 xa_unlock_irqrestore(per_store_ap, iflags);
6994
6995 res = -ENOMEM;
6996 sip->storep = vzalloc(sz);
6997 if (!sip->storep) {
6998 pr_err("user data oom\n");
6999 goto err;
7000 }
7001 if (sdebug_num_parts > 0)
7002 sdebug_build_parts(sip->storep, sz);
7003
7004 /* DIF/DIX: what T10 calls Protection Information (PI) */
7005 if (sdebug_dix) {
7006 int dif_size;
7007
7008 dif_size = sdebug_store_sectors * sizeof(struct t10_pi_tuple);
7009 sip->dif_storep = vmalloc(dif_size);
7010
7011 pr_info("dif_storep %u bytes @ %pK\n", dif_size,
7012 sip->dif_storep);
7013
7014 if (!sip->dif_storep) {
7015 pr_err("DIX oom\n");
7016 goto err;
7017 }
7018 memset(sip->dif_storep, 0xff, dif_size);
7019 }
7020 /* Logical Block Provisioning */
7021 if (scsi_debug_lbp()) {
7022 map_size = lba_to_map_index(sdebug_store_sectors - 1) + 1;
7023 sip->map_storep = vmalloc(array_size(sizeof(long),
7024 BITS_TO_LONGS(map_size)));
7025
7026 pr_info("%lu provisioning blocks\n", map_size);
7027
7028 if (!sip->map_storep) {
7029 pr_err("LBP map oom\n");
7030 goto err;
7031 }
7032
7033 bitmap_zero(sip->map_storep, map_size);
7034
7035 /* Map first 1KB for partition table */
7036 if (sdebug_num_parts)
7037 map_region(sip, 0, 2);
7038 }
7039
7040 rwlock_init(&sip->macc_lck);
7041 return (int)n_idx;
7042err:
7043 sdebug_erase_store((int)n_idx, sip);
7044 pr_warn("%s: failed, errno=%d\n", __func__, -res);
7045 return res;
7046}
7047
7048static int sdebug_add_host_helper(int per_host_idx)
7049{
7050 int k, devs_per_host, idx;
7051 int error = -ENOMEM;
7052 struct sdebug_host_info *sdbg_host;
7053 struct sdebug_dev_info *sdbg_devinfo, *tmp;
7054
7055 sdbg_host = kzalloc(sizeof(*sdbg_host), GFP_KERNEL);
7056 if (!sdbg_host)
7057 return -ENOMEM;
7058 idx = (per_host_idx < 0) ? sdeb_first_idx : per_host_idx;
7059 if (xa_get_mark(per_store_ap, idx, SDEB_XA_NOT_IN_USE))
7060 xa_clear_mark(per_store_ap, idx, SDEB_XA_NOT_IN_USE);
7061 sdbg_host->si_idx = idx;
7062
7063 INIT_LIST_HEAD(&sdbg_host->dev_info_list);
7064
7065 devs_per_host = sdebug_num_tgts * sdebug_max_luns;
7066 for (k = 0; k < devs_per_host; k++) {
7067 sdbg_devinfo = sdebug_device_create(sdbg_host, GFP_KERNEL);
7068 if (!sdbg_devinfo)
7069 goto clean;
7070 }
7071
7072 spin_lock(&sdebug_host_list_lock);
7073 list_add_tail(&sdbg_host->host_list, &sdebug_host_list);
7074 spin_unlock(&sdebug_host_list_lock);
7075
7076 sdbg_host->dev.bus = &pseudo_lld_bus;
7077 sdbg_host->dev.parent = pseudo_primary;
7078 sdbg_host->dev.release = &sdebug_release_adapter;
7079 dev_set_name(&sdbg_host->dev, "adapter%d", sdebug_num_hosts);
7080
7081 error = device_register(&sdbg_host->dev);
7082 if (error)
7083 goto clean;
7084
7085 ++sdebug_num_hosts;
7086 return 0;
7087
7088clean:
7089 list_for_each_entry_safe(sdbg_devinfo, tmp, &sdbg_host->dev_info_list,
7090 dev_list) {
7091 list_del(&sdbg_devinfo->dev_list);
7092 kfree(sdbg_devinfo->zstate);
7093 kfree(sdbg_devinfo);
7094 }
7095 kfree(sdbg_host);
7096 pr_warn("%s: failed, errno=%d\n", __func__, -error);
7097 return error;
7098}
7099
7100static int sdebug_do_add_host(bool mk_new_store)
7101{
7102 int ph_idx = sdeb_most_recent_idx;
7103
7104 if (mk_new_store) {
7105 ph_idx = sdebug_add_store();
7106 if (ph_idx < 0)
7107 return ph_idx;
7108 }
7109 return sdebug_add_host_helper(ph_idx);
7110}
7111
7112static void sdebug_do_remove_host(bool the_end)
7113{
7114 int idx = -1;
7115 struct sdebug_host_info *sdbg_host = NULL;
7116 struct sdebug_host_info *sdbg_host2;
7117
7118 spin_lock(&sdebug_host_list_lock);
7119 if (!list_empty(&sdebug_host_list)) {
7120 sdbg_host = list_entry(sdebug_host_list.prev,
7121 struct sdebug_host_info, host_list);
7122 idx = sdbg_host->si_idx;
7123 }
7124 if (!the_end && idx >= 0) {
7125 bool unique = true;
7126
7127 list_for_each_entry(sdbg_host2, &sdebug_host_list, host_list) {
7128 if (sdbg_host2 == sdbg_host)
7129 continue;
7130 if (idx == sdbg_host2->si_idx) {
7131 unique = false;
7132 break;
7133 }
7134 }
7135 if (unique) {
7136 xa_set_mark(per_store_ap, idx, SDEB_XA_NOT_IN_USE);
7137 if (idx == sdeb_most_recent_idx)
7138 --sdeb_most_recent_idx;
7139 }
7140 }
7141 if (sdbg_host)
7142 list_del(&sdbg_host->host_list);
7143 spin_unlock(&sdebug_host_list_lock);
7144
7145 if (!sdbg_host)
7146 return;
7147
7148 device_unregister(&sdbg_host->dev);
7149 --sdebug_num_hosts;
7150}
7151
7152static int sdebug_change_qdepth(struct scsi_device *sdev, int qdepth)
7153{
7154 int num_in_q = 0;
7155 struct sdebug_dev_info *devip;
7156
7157 block_unblock_all_queues(true);
7158 devip = (struct sdebug_dev_info *)sdev->hostdata;
7159 if (NULL == devip) {
7160 block_unblock_all_queues(false);
7161 return -ENODEV;
7162 }
7163 num_in_q = atomic_read(&devip->num_in_q);
7164
7165 if (qdepth > SDEBUG_CANQUEUE) {
7166 qdepth = SDEBUG_CANQUEUE;
7167 pr_warn("%s: requested qdepth [%d] exceeds canqueue [%d], trim\n", __func__,
7168 qdepth, SDEBUG_CANQUEUE);
7169 }
7170 if (qdepth < 1)
7171 qdepth = 1;
7172 if (qdepth != sdev->queue_depth)
7173 scsi_change_queue_depth(sdev, qdepth);
7174
7175 if (SDEBUG_OPT_Q_NOISE & sdebug_opts) {
7176 sdev_printk(KERN_INFO, sdev, "%s: qdepth=%d, num_in_q=%d\n",
7177 __func__, qdepth, num_in_q);
7178 }
7179 block_unblock_all_queues(false);
7180 return sdev->queue_depth;
7181}
7182
7183static bool fake_timeout(struct scsi_cmnd *scp)
7184{
7185 if (0 == (atomic_read(&sdebug_cmnd_count) % abs(sdebug_every_nth))) {
7186 if (sdebug_every_nth < -1)
7187 sdebug_every_nth = -1;
7188 if (SDEBUG_OPT_TIMEOUT & sdebug_opts)
7189 return true; /* ignore command causing timeout */
7190 else if (SDEBUG_OPT_MAC_TIMEOUT & sdebug_opts &&
7191 scsi_medium_access_command(scp))
7192 return true; /* time out reads and writes */
7193 }
7194 return false;
7195}
7196
7197/* Response to TUR or media access command when device stopped */
7198static int resp_not_ready(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
7199{
7200 int stopped_state;
7201 u64 diff_ns = 0;
7202 ktime_t now_ts = ktime_get_boottime();
7203 struct scsi_device *sdp = scp->device;
7204
7205 stopped_state = atomic_read(&devip->stopped);
7206 if (stopped_state == 2) {
7207 if (ktime_to_ns(now_ts) > ktime_to_ns(devip->create_ts)) {
7208 diff_ns = ktime_to_ns(ktime_sub(now_ts, devip->create_ts));
7209 if (diff_ns >= ((u64)sdeb_tur_ms_to_ready * 1000000)) {
7210 /* tur_ms_to_ready timer extinguished */
7211 atomic_set(&devip->stopped, 0);
7212 return 0;
7213 }
7214 }
7215 mk_sense_buffer(scp, NOT_READY, LOGICAL_UNIT_NOT_READY, 0x1);
7216 if (sdebug_verbose)
7217 sdev_printk(KERN_INFO, sdp,
7218 "%s: Not ready: in process of becoming ready\n", my_name);
7219 if (scp->cmnd[0] == TEST_UNIT_READY) {
7220 u64 tur_nanosecs_to_ready = (u64)sdeb_tur_ms_to_ready * 1000000;
7221
7222 if (diff_ns <= tur_nanosecs_to_ready)
7223 diff_ns = tur_nanosecs_to_ready - diff_ns;
7224 else
7225 diff_ns = tur_nanosecs_to_ready;
7226 /* As per 20-061r2 approved for spc6 by T10 on 20200716 */
7227 do_div(diff_ns, 1000000); /* diff_ns becomes milliseconds */
7228 scsi_set_sense_information(scp->sense_buffer, SCSI_SENSE_BUFFERSIZE,
7229 diff_ns);
7230 return check_condition_result;
7231 }
7232 }
7233 mk_sense_buffer(scp, NOT_READY, LOGICAL_UNIT_NOT_READY, 0x2);
7234 if (sdebug_verbose)
7235 sdev_printk(KERN_INFO, sdp, "%s: Not ready: initializing command required\n",
7236 my_name);
7237 return check_condition_result;
7238}
7239
7240static int sdebug_map_queues(struct Scsi_Host *shost)
7241{
7242 int i, qoff;
7243
7244 if (shost->nr_hw_queues == 1)
7245 return 0;
7246
7247 for (i = 0, qoff = 0; i < HCTX_MAX_TYPES; i++) {
7248 struct blk_mq_queue_map *map = &shost->tag_set.map[i];
7249
7250 map->nr_queues = 0;
7251
7252 if (i == HCTX_TYPE_DEFAULT)
7253 map->nr_queues = submit_queues - poll_queues;
7254 else if (i == HCTX_TYPE_POLL)
7255 map->nr_queues = poll_queues;
7256
7257 if (!map->nr_queues) {
7258 BUG_ON(i == HCTX_TYPE_DEFAULT);
7259 continue;
7260 }
7261
7262 map->queue_offset = qoff;
7263 blk_mq_map_queues(map);
7264
7265 qoff += map->nr_queues;
7266 }
7267
7268 return 0;
7269
7270}
7271
7272static int sdebug_blk_mq_poll(struct Scsi_Host *shost, unsigned int queue_num)
7273{
7274 bool first;
7275 bool retiring = false;
7276 int num_entries = 0;
7277 unsigned int qc_idx = 0;
7278 unsigned long iflags;
7279 ktime_t kt_from_boot = ktime_get_boottime();
7280 struct sdebug_queue *sqp;
7281 struct sdebug_queued_cmd *sqcp;
7282 struct scsi_cmnd *scp;
7283 struct sdebug_dev_info *devip;
7284 struct sdebug_defer *sd_dp;
7285
7286 sqp = sdebug_q_arr + queue_num;
7287 spin_lock_irqsave(&sqp->qc_lock, iflags);
7288
7289 for (first = true; first || qc_idx + 1 < sdebug_max_queue; ) {
7290 if (first) {
7291 qc_idx = find_first_bit(sqp->in_use_bm, sdebug_max_queue);
7292 first = false;
7293 } else {
7294 qc_idx = find_next_bit(sqp->in_use_bm, sdebug_max_queue, qc_idx + 1);
7295 }
7296 if (unlikely(qc_idx >= sdebug_max_queue))
7297 break;
7298
7299 sqcp = &sqp->qc_arr[qc_idx];
7300 sd_dp = sqcp->sd_dp;
7301 if (unlikely(!sd_dp))
7302 continue;
7303 scp = sqcp->a_cmnd;
7304 if (unlikely(scp == NULL)) {
7305 pr_err("scp is NULL, queue_num=%d, qc_idx=%u from %s\n",
7306 queue_num, qc_idx, __func__);
7307 break;
7308 }
7309 if (sd_dp->defer_t == SDEB_DEFER_POLL) {
7310 if (kt_from_boot < sd_dp->cmpl_ts)
7311 continue;
7312
7313 } else /* ignoring non REQ_HIPRI requests */
7314 continue;
7315 devip = (struct sdebug_dev_info *)scp->device->hostdata;
7316 if (likely(devip))
7317 atomic_dec(&devip->num_in_q);
7318 else
7319 pr_err("devip=NULL from %s\n", __func__);
7320 if (unlikely(atomic_read(&retired_max_queue) > 0))
7321 retiring = true;
7322
7323 sqcp->a_cmnd = NULL;
7324 if (unlikely(!test_and_clear_bit(qc_idx, sqp->in_use_bm))) {
7325 pr_err("Unexpected completion sqp %p queue_num=%d qc_idx=%u from %s\n",
7326 sqp, queue_num, qc_idx, __func__);
7327 break;
7328 }
7329 if (unlikely(retiring)) { /* user has reduced max_queue */
7330 int k, retval;
7331
7332 retval = atomic_read(&retired_max_queue);
7333 if (qc_idx >= retval) {
7334 pr_err("index %d too large\n", retval);
7335 break;
7336 }
7337 k = find_last_bit(sqp->in_use_bm, retval);
7338 if ((k < sdebug_max_queue) || (k == retval))
7339 atomic_set(&retired_max_queue, 0);
7340 else
7341 atomic_set(&retired_max_queue, k + 1);
7342 }
7343 sd_dp->defer_t = SDEB_DEFER_NONE;
7344 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
7345 scp->scsi_done(scp); /* callback to mid level */
7346 spin_lock_irqsave(&sqp->qc_lock, iflags);
7347 num_entries++;
7348 }
7349 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
7350 if (num_entries > 0)
7351 atomic_add(num_entries, &sdeb_mq_poll_count);
7352 return num_entries;
7353}
7354
7355static int scsi_debug_queuecommand(struct Scsi_Host *shost,
7356 struct scsi_cmnd *scp)
7357{
7358 u8 sdeb_i;
7359 struct scsi_device *sdp = scp->device;
7360 const struct opcode_info_t *oip;
7361 const struct opcode_info_t *r_oip;
7362 struct sdebug_dev_info *devip;
7363 u8 *cmd = scp->cmnd;
7364 int (*r_pfp)(struct scsi_cmnd *, struct sdebug_dev_info *);
7365 int (*pfp)(struct scsi_cmnd *, struct sdebug_dev_info *) = NULL;
7366 int k, na;
7367 int errsts = 0;
7368 u64 lun_index = sdp->lun & 0x3FFF;
7369 u32 flags;
7370 u16 sa;
7371 u8 opcode = cmd[0];
7372 bool has_wlun_rl;
7373 bool inject_now;
7374
7375 scsi_set_resid(scp, 0);
7376 if (sdebug_statistics) {
7377 atomic_inc(&sdebug_cmnd_count);
7378 inject_now = inject_on_this_cmd();
7379 } else {
7380 inject_now = false;
7381 }
7382 if (unlikely(sdebug_verbose &&
7383 !(SDEBUG_OPT_NO_CDB_NOISE & sdebug_opts))) {
7384 char b[120];
7385 int n, len, sb;
7386
7387 len = scp->cmd_len;
7388 sb = (int)sizeof(b);
7389 if (len > 32)
7390 strcpy(b, "too long, over 32 bytes");
7391 else {
7392 for (k = 0, n = 0; k < len && n < sb; ++k)
7393 n += scnprintf(b + n, sb - n, "%02x ",
7394 (u32)cmd[k]);
7395 }
7396 sdev_printk(KERN_INFO, sdp, "%s: tag=%#x, cmd %s\n", my_name,
7397 blk_mq_unique_tag(scp->request), b);
7398 }
7399 if (unlikely(inject_now && (sdebug_opts & SDEBUG_OPT_HOST_BUSY)))
7400 return SCSI_MLQUEUE_HOST_BUSY;
7401 has_wlun_rl = (sdp->lun == SCSI_W_LUN_REPORT_LUNS);
7402 if (unlikely(lun_index >= sdebug_max_luns && !has_wlun_rl))
7403 goto err_out;
7404
7405 sdeb_i = opcode_ind_arr[opcode]; /* fully mapped */
7406 oip = &opcode_info_arr[sdeb_i]; /* safe if table consistent */
7407 devip = (struct sdebug_dev_info *)sdp->hostdata;
7408 if (unlikely(!devip)) {
7409 devip = find_build_dev_info(sdp);
7410 if (NULL == devip)
7411 goto err_out;
7412 }
7413 if (unlikely(inject_now && !atomic_read(&sdeb_inject_pending)))
7414 atomic_set(&sdeb_inject_pending, 1);
7415
7416 na = oip->num_attached;
7417 r_pfp = oip->pfp;
7418 if (na) { /* multiple commands with this opcode */
7419 r_oip = oip;
7420 if (FF_SA & r_oip->flags) {
7421 if (F_SA_LOW & oip->flags)
7422 sa = 0x1f & cmd[1];
7423 else
7424 sa = get_unaligned_be16(cmd + 8);
7425 for (k = 0; k <= na; oip = r_oip->arrp + k++) {
7426 if (opcode == oip->opcode && sa == oip->sa)
7427 break;
7428 }
7429 } else { /* since no service action only check opcode */
7430 for (k = 0; k <= na; oip = r_oip->arrp + k++) {
7431 if (opcode == oip->opcode)
7432 break;
7433 }
7434 }
7435 if (k > na) {
7436 if (F_SA_LOW & r_oip->flags)
7437 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 4);
7438 else if (F_SA_HIGH & r_oip->flags)
7439 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 8, 7);
7440 else
7441 mk_sense_invalid_opcode(scp);
7442 goto check_cond;
7443 }
7444 } /* else (when na==0) we assume the oip is a match */
7445 flags = oip->flags;
7446 if (unlikely(F_INV_OP & flags)) {
7447 mk_sense_invalid_opcode(scp);
7448 goto check_cond;
7449 }
7450 if (unlikely(has_wlun_rl && !(F_RL_WLUN_OK & flags))) {
7451 if (sdebug_verbose)
7452 sdev_printk(KERN_INFO, sdp, "%s: Opcode 0x%x not%s\n",
7453 my_name, opcode, " supported for wlun");
7454 mk_sense_invalid_opcode(scp);
7455 goto check_cond;
7456 }
7457 if (unlikely(sdebug_strict)) { /* check cdb against mask */
7458 u8 rem;
7459 int j;
7460
7461 for (k = 1; k < oip->len_mask[0] && k < 16; ++k) {
7462 rem = ~oip->len_mask[k] & cmd[k];
7463 if (rem) {
7464 for (j = 7; j >= 0; --j, rem <<= 1) {
7465 if (0x80 & rem)
7466 break;
7467 }
7468 mk_sense_invalid_fld(scp, SDEB_IN_CDB, k, j);
7469 goto check_cond;
7470 }
7471 }
7472 }
7473 if (unlikely(!(F_SKIP_UA & flags) &&
7474 find_first_bit(devip->uas_bm,
7475 SDEBUG_NUM_UAS) != SDEBUG_NUM_UAS)) {
7476 errsts = make_ua(scp, devip);
7477 if (errsts)
7478 goto check_cond;
7479 }
7480 if (unlikely(((F_M_ACCESS & flags) || scp->cmnd[0] == TEST_UNIT_READY) &&
7481 atomic_read(&devip->stopped))) {
7482 errsts = resp_not_ready(scp, devip);
7483 if (errsts)
7484 goto fini;
7485 }
7486 if (sdebug_fake_rw && (F_FAKE_RW & flags))
7487 goto fini;
7488 if (unlikely(sdebug_every_nth)) {
7489 if (fake_timeout(scp))
7490 return 0; /* ignore command: make trouble */
7491 }
7492 if (likely(oip->pfp))
7493 pfp = oip->pfp; /* calls a resp_* function */
7494 else
7495 pfp = r_pfp; /* if leaf function ptr NULL, try the root's */
7496
7497fini:
7498 if (F_DELAY_OVERR & flags) /* cmds like INQUIRY respond asap */
7499 return schedule_resp(scp, devip, errsts, pfp, 0, 0);
7500 else if ((flags & F_LONG_DELAY) && (sdebug_jdelay > 0 ||
7501 sdebug_ndelay > 10000)) {
7502 /*
7503 * Skip long delays if ndelay <= 10 microseconds. Otherwise
7504 * for Start Stop Unit (SSU) want at least 1 second delay and
7505 * if sdebug_jdelay>1 want a long delay of that many seconds.
7506 * For Synchronize Cache want 1/20 of SSU's delay.
7507 */
7508 int jdelay = (sdebug_jdelay < 2) ? 1 : sdebug_jdelay;
7509 int denom = (flags & F_SYNC_DELAY) ? 20 : 1;
7510
7511 jdelay = mult_frac(USER_HZ * jdelay, HZ, denom * USER_HZ);
7512 return schedule_resp(scp, devip, errsts, pfp, jdelay, 0);
7513 } else
7514 return schedule_resp(scp, devip, errsts, pfp, sdebug_jdelay,
7515 sdebug_ndelay);
7516check_cond:
7517 return schedule_resp(scp, devip, check_condition_result, NULL, 0, 0);
7518err_out:
7519 return schedule_resp(scp, NULL, DID_NO_CONNECT << 16, NULL, 0, 0);
7520}
7521
7522static struct scsi_host_template sdebug_driver_template = {
7523 .show_info = scsi_debug_show_info,
7524 .write_info = scsi_debug_write_info,
7525 .proc_name = sdebug_proc_name,
7526 .name = "SCSI DEBUG",
7527 .info = scsi_debug_info,
7528 .slave_alloc = scsi_debug_slave_alloc,
7529 .slave_configure = scsi_debug_slave_configure,
7530 .slave_destroy = scsi_debug_slave_destroy,
7531 .ioctl = scsi_debug_ioctl,
7532 .queuecommand = scsi_debug_queuecommand,
7533 .change_queue_depth = sdebug_change_qdepth,
7534 .map_queues = sdebug_map_queues,
7535 .mq_poll = sdebug_blk_mq_poll,
7536 .eh_abort_handler = scsi_debug_abort,
7537 .eh_device_reset_handler = scsi_debug_device_reset,
7538 .eh_target_reset_handler = scsi_debug_target_reset,
7539 .eh_bus_reset_handler = scsi_debug_bus_reset,
7540 .eh_host_reset_handler = scsi_debug_host_reset,
7541 .can_queue = SDEBUG_CANQUEUE,
7542 .this_id = 7,
7543 .sg_tablesize = SG_MAX_SEGMENTS,
7544 .cmd_per_lun = DEF_CMD_PER_LUN,
7545 .max_sectors = -1U,
7546 .max_segment_size = -1U,
7547 .module = THIS_MODULE,
7548 .track_queue_depth = 1,
7549};
7550
7551static int sdebug_driver_probe(struct device *dev)
7552{
7553 int error = 0;
7554 struct sdebug_host_info *sdbg_host;
7555 struct Scsi_Host *hpnt;
7556 int hprot;
7557
7558 sdbg_host = to_sdebug_host(dev);
7559
7560 sdebug_driver_template.can_queue = sdebug_max_queue;
7561 sdebug_driver_template.cmd_per_lun = sdebug_max_queue;
7562 if (!sdebug_clustering)
7563 sdebug_driver_template.dma_boundary = PAGE_SIZE - 1;
7564
7565 hpnt = scsi_host_alloc(&sdebug_driver_template, sizeof(sdbg_host));
7566 if (NULL == hpnt) {
7567 pr_err("scsi_host_alloc failed\n");
7568 error = -ENODEV;
7569 return error;
7570 }
7571 if (submit_queues > nr_cpu_ids) {
7572 pr_warn("%s: trim submit_queues (was %d) to nr_cpu_ids=%u\n",
7573 my_name, submit_queues, nr_cpu_ids);
7574 submit_queues = nr_cpu_ids;
7575 }
7576 /*
7577 * Decide whether to tell scsi subsystem that we want mq. The
7578 * following should give the same answer for each host.
7579 */
7580 hpnt->nr_hw_queues = submit_queues;
7581 if (sdebug_host_max_queue)
7582 hpnt->host_tagset = 1;
7583
7584 /* poll queues are possible for nr_hw_queues > 1 */
7585 if (hpnt->nr_hw_queues == 1 || (poll_queues < 1)) {
7586 pr_warn("%s: trim poll_queues to 0. poll_q/nr_hw = (%d/%d)\n",
7587 my_name, poll_queues, hpnt->nr_hw_queues);
7588 poll_queues = 0;
7589 }
7590
7591 /*
7592 * Poll queues don't need interrupts, but we need at least one I/O queue
7593 * left over for non-polled I/O.
7594 * If condition not met, trim poll_queues to 1 (just for simplicity).
7595 */
7596 if (poll_queues >= submit_queues) {
7597 if (submit_queues < 3)
7598 pr_warn("%s: trim poll_queues to 1\n", my_name);
7599 else
7600 pr_warn("%s: trim poll_queues to 1. Perhaps try poll_queues=%d\n",
7601 my_name, submit_queues - 1);
7602 poll_queues = 1;
7603 }
7604 if (poll_queues)
7605 hpnt->nr_maps = 3;
7606
7607 sdbg_host->shost = hpnt;
7608 *((struct sdebug_host_info **)hpnt->hostdata) = sdbg_host;
7609 if ((hpnt->this_id >= 0) && (sdebug_num_tgts > hpnt->this_id))
7610 hpnt->max_id = sdebug_num_tgts + 1;
7611 else
7612 hpnt->max_id = sdebug_num_tgts;
7613 /* = sdebug_max_luns; */
7614 hpnt->max_lun = SCSI_W_LUN_REPORT_LUNS + 1;
7615
7616 hprot = 0;
7617
7618 switch (sdebug_dif) {
7619
7620 case T10_PI_TYPE1_PROTECTION:
7621 hprot = SHOST_DIF_TYPE1_PROTECTION;
7622 if (sdebug_dix)
7623 hprot |= SHOST_DIX_TYPE1_PROTECTION;
7624 break;
7625
7626 case T10_PI_TYPE2_PROTECTION:
7627 hprot = SHOST_DIF_TYPE2_PROTECTION;
7628 if (sdebug_dix)
7629 hprot |= SHOST_DIX_TYPE2_PROTECTION;
7630 break;
7631
7632 case T10_PI_TYPE3_PROTECTION:
7633 hprot = SHOST_DIF_TYPE3_PROTECTION;
7634 if (sdebug_dix)
7635 hprot |= SHOST_DIX_TYPE3_PROTECTION;
7636 break;
7637
7638 default:
7639 if (sdebug_dix)
7640 hprot |= SHOST_DIX_TYPE0_PROTECTION;
7641 break;
7642 }
7643
7644 scsi_host_set_prot(hpnt, hprot);
7645
7646 if (have_dif_prot || sdebug_dix)
7647 pr_info("host protection%s%s%s%s%s%s%s\n",
7648 (hprot & SHOST_DIF_TYPE1_PROTECTION) ? " DIF1" : "",
7649 (hprot & SHOST_DIF_TYPE2_PROTECTION) ? " DIF2" : "",
7650 (hprot & SHOST_DIF_TYPE3_PROTECTION) ? " DIF3" : "",
7651 (hprot & SHOST_DIX_TYPE0_PROTECTION) ? " DIX0" : "",
7652 (hprot & SHOST_DIX_TYPE1_PROTECTION) ? " DIX1" : "",
7653 (hprot & SHOST_DIX_TYPE2_PROTECTION) ? " DIX2" : "",
7654 (hprot & SHOST_DIX_TYPE3_PROTECTION) ? " DIX3" : "");
7655
7656 if (sdebug_guard == 1)
7657 scsi_host_set_guard(hpnt, SHOST_DIX_GUARD_IP);
7658 else
7659 scsi_host_set_guard(hpnt, SHOST_DIX_GUARD_CRC);
7660
7661 sdebug_verbose = !!(SDEBUG_OPT_NOISE & sdebug_opts);
7662 sdebug_any_injecting_opt = !!(SDEBUG_OPT_ALL_INJECTING & sdebug_opts);
7663 if (sdebug_every_nth) /* need stats counters for every_nth */
7664 sdebug_statistics = true;
7665 error = scsi_add_host(hpnt, &sdbg_host->dev);
7666 if (error) {
7667 pr_err("scsi_add_host failed\n");
7668 error = -ENODEV;
7669 scsi_host_put(hpnt);
7670 } else {
7671 scsi_scan_host(hpnt);
7672 }
7673
7674 return error;
7675}
7676
7677static int sdebug_driver_remove(struct device *dev)
7678{
7679 struct sdebug_host_info *sdbg_host;
7680 struct sdebug_dev_info *sdbg_devinfo, *tmp;
7681
7682 sdbg_host = to_sdebug_host(dev);
7683
7684 scsi_remove_host(sdbg_host->shost);
7685
7686 list_for_each_entry_safe(sdbg_devinfo, tmp, &sdbg_host->dev_info_list,
7687 dev_list) {
7688 list_del(&sdbg_devinfo->dev_list);
7689 kfree(sdbg_devinfo->zstate);
7690 kfree(sdbg_devinfo);
7691 }
7692
7693 scsi_host_put(sdbg_host->shost);
7694 return 0;
7695}
7696
7697static int pseudo_lld_bus_match(struct device *dev,
7698 struct device_driver *dev_driver)
7699{
7700 return 1;
7701}
7702
7703static struct bus_type pseudo_lld_bus = {
7704 .name = "pseudo",
7705 .match = pseudo_lld_bus_match,
7706 .probe = sdebug_driver_probe,
7707 .remove = sdebug_driver_remove,
7708 .drv_groups = sdebug_drv_groups,
7709};