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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 - 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};
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/* If REPORT LUNS has luns >= 256 it can choose "flat space" (value 1)
213 * or "peripheral device" addressing (value 0) */
214#define SAM2_LUN_ADDRESS_METHOD 0
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 255
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
255/* Zone types (zbcr05 table 25) */
256enum sdebug_z_type {
257 ZBC_ZONE_TYPE_CNV = 0x1,
258 ZBC_ZONE_TYPE_SWR = 0x2,
259 ZBC_ZONE_TYPE_SWP = 0x3,
260};
261
262/* enumeration names taken from table 26, zbcr05 */
263enum sdebug_z_cond {
264 ZBC_NOT_WRITE_POINTER = 0x0,
265 ZC1_EMPTY = 0x1,
266 ZC2_IMPLICIT_OPEN = 0x2,
267 ZC3_EXPLICIT_OPEN = 0x3,
268 ZC4_CLOSED = 0x4,
269 ZC6_READ_ONLY = 0xd,
270 ZC5_FULL = 0xe,
271 ZC7_OFFLINE = 0xf,
272};
273
274struct sdeb_zone_state { /* ZBC: per zone state */
275 enum sdebug_z_type z_type;
276 enum sdebug_z_cond z_cond;
277 bool z_non_seq_resource;
278 unsigned int z_size;
279 sector_t z_start;
280 sector_t z_wp;
281};
282
283struct sdebug_dev_info {
284 struct list_head dev_list;
285 unsigned int channel;
286 unsigned int target;
287 u64 lun;
288 uuid_t lu_name;
289 struct sdebug_host_info *sdbg_host;
290 unsigned long uas_bm[1];
291 atomic_t num_in_q;
292 atomic_t stopped; /* 1: by SSU, 2: device start */
293 bool used;
294
295 /* For ZBC devices */
296 enum blk_zoned_model zmodel;
297 unsigned int zsize;
298 unsigned int zsize_shift;
299 unsigned int nr_zones;
300 unsigned int nr_conv_zones;
301 unsigned int nr_imp_open;
302 unsigned int nr_exp_open;
303 unsigned int nr_closed;
304 unsigned int max_open;
305 ktime_t create_ts; /* time since bootup that this device was created */
306 struct sdeb_zone_state *zstate;
307};
308
309struct sdebug_host_info {
310 struct list_head host_list;
311 int si_idx; /* sdeb_store_info (per host) xarray index */
312 struct Scsi_Host *shost;
313 struct device dev;
314 struct list_head dev_info_list;
315};
316
317/* There is an xarray of pointers to this struct's objects, one per host */
318struct sdeb_store_info {
319 rwlock_t macc_lck; /* for atomic media access on this store */
320 u8 *storep; /* user data storage (ram) */
321 struct t10_pi_tuple *dif_storep; /* protection info */
322 void *map_storep; /* provisioning map */
323};
324
325#define to_sdebug_host(d) \
326 container_of(d, struct sdebug_host_info, dev)
327
328enum sdeb_defer_type {SDEB_DEFER_NONE = 0, SDEB_DEFER_HRT = 1,
329 SDEB_DEFER_WQ = 2};
330
331struct sdebug_defer {
332 struct hrtimer hrt;
333 struct execute_work ew;
334 int sqa_idx; /* index of sdebug_queue array */
335 int qc_idx; /* index of sdebug_queued_cmd array within sqa_idx */
336 int hc_idx; /* hostwide tag index */
337 int issuing_cpu;
338 bool init_hrt;
339 bool init_wq;
340 bool aborted; /* true when blk_abort_request() already called */
341 enum sdeb_defer_type defer_t;
342};
343
344struct sdebug_queued_cmd {
345 /* corresponding bit set in in_use_bm[] in owning struct sdebug_queue
346 * instance indicates this slot is in use.
347 */
348 struct sdebug_defer *sd_dp;
349 struct scsi_cmnd *a_cmnd;
350};
351
352struct sdebug_queue {
353 struct sdebug_queued_cmd qc_arr[SDEBUG_CANQUEUE];
354 unsigned long in_use_bm[SDEBUG_CANQUEUE_WORDS];
355 spinlock_t qc_lock;
356 atomic_t blocked; /* to temporarily stop more being queued */
357};
358
359static atomic_t sdebug_cmnd_count; /* number of incoming commands */
360static atomic_t sdebug_completions; /* count of deferred completions */
361static atomic_t sdebug_miss_cpus; /* submission + completion cpus differ */
362static atomic_t sdebug_a_tsf; /* 'almost task set full' counter */
363static atomic_t sdeb_inject_pending;
364
365struct opcode_info_t {
366 u8 num_attached; /* 0 if this is it (i.e. a leaf); use 0xff */
367 /* for terminating element */
368 u8 opcode; /* if num_attached > 0, preferred */
369 u16 sa; /* service action */
370 u32 flags; /* OR-ed set of SDEB_F_* */
371 int (*pfp)(struct scsi_cmnd *, struct sdebug_dev_info *);
372 const struct opcode_info_t *arrp; /* num_attached elements or NULL */
373 u8 len_mask[16]; /* len_mask[0]-->cdb_len, then mask for cdb */
374 /* 1 to min(cdb_len, 15); ignore cdb[15...] */
375};
376
377/* SCSI opcodes (first byte of cdb) of interest mapped onto these indexes */
378enum sdeb_opcode_index {
379 SDEB_I_INVALID_OPCODE = 0,
380 SDEB_I_INQUIRY = 1,
381 SDEB_I_REPORT_LUNS = 2,
382 SDEB_I_REQUEST_SENSE = 3,
383 SDEB_I_TEST_UNIT_READY = 4,
384 SDEB_I_MODE_SENSE = 5, /* 6, 10 */
385 SDEB_I_MODE_SELECT = 6, /* 6, 10 */
386 SDEB_I_LOG_SENSE = 7,
387 SDEB_I_READ_CAPACITY = 8, /* 10; 16 is in SA_IN(16) */
388 SDEB_I_READ = 9, /* 6, 10, 12, 16 */
389 SDEB_I_WRITE = 10, /* 6, 10, 12, 16 */
390 SDEB_I_START_STOP = 11,
391 SDEB_I_SERV_ACT_IN_16 = 12, /* add ...SERV_ACT_IN_12 if needed */
392 SDEB_I_SERV_ACT_OUT_16 = 13, /* add ...SERV_ACT_OUT_12 if needed */
393 SDEB_I_MAINT_IN = 14,
394 SDEB_I_MAINT_OUT = 15,
395 SDEB_I_VERIFY = 16, /* VERIFY(10), VERIFY(16) */
396 SDEB_I_VARIABLE_LEN = 17, /* READ(32), WRITE(32), WR_SCAT(32) */
397 SDEB_I_RESERVE = 18, /* 6, 10 */
398 SDEB_I_RELEASE = 19, /* 6, 10 */
399 SDEB_I_ALLOW_REMOVAL = 20, /* PREVENT ALLOW MEDIUM REMOVAL */
400 SDEB_I_REZERO_UNIT = 21, /* REWIND in SSC */
401 SDEB_I_ATA_PT = 22, /* 12, 16 */
402 SDEB_I_SEND_DIAG = 23,
403 SDEB_I_UNMAP = 24,
404 SDEB_I_WRITE_BUFFER = 25,
405 SDEB_I_WRITE_SAME = 26, /* 10, 16 */
406 SDEB_I_SYNC_CACHE = 27, /* 10, 16 */
407 SDEB_I_COMP_WRITE = 28,
408 SDEB_I_PRE_FETCH = 29, /* 10, 16 */
409 SDEB_I_ZONE_OUT = 30, /* 0x94+SA; includes no data xfer */
410 SDEB_I_ZONE_IN = 31, /* 0x95+SA; all have data-in */
411 SDEB_I_LAST_ELEM_P1 = 32, /* keep this last (previous + 1) */
412};
413
414
415static const unsigned char opcode_ind_arr[256] = {
416/* 0x0; 0x0->0x1f: 6 byte cdbs */
417 SDEB_I_TEST_UNIT_READY, SDEB_I_REZERO_UNIT, 0, SDEB_I_REQUEST_SENSE,
418 0, 0, 0, 0,
419 SDEB_I_READ, 0, SDEB_I_WRITE, 0, 0, 0, 0, 0,
420 0, 0, SDEB_I_INQUIRY, 0, 0, SDEB_I_MODE_SELECT, SDEB_I_RESERVE,
421 SDEB_I_RELEASE,
422 0, 0, SDEB_I_MODE_SENSE, SDEB_I_START_STOP, 0, SDEB_I_SEND_DIAG,
423 SDEB_I_ALLOW_REMOVAL, 0,
424/* 0x20; 0x20->0x3f: 10 byte cdbs */
425 0, 0, 0, 0, 0, SDEB_I_READ_CAPACITY, 0, 0,
426 SDEB_I_READ, 0, SDEB_I_WRITE, 0, 0, 0, 0, SDEB_I_VERIFY,
427 0, 0, 0, 0, SDEB_I_PRE_FETCH, SDEB_I_SYNC_CACHE, 0, 0,
428 0, 0, 0, SDEB_I_WRITE_BUFFER, 0, 0, 0, 0,
429/* 0x40; 0x40->0x5f: 10 byte cdbs */
430 0, SDEB_I_WRITE_SAME, SDEB_I_UNMAP, 0, 0, 0, 0, 0,
431 0, 0, 0, 0, 0, SDEB_I_LOG_SENSE, 0, 0,
432 0, 0, 0, 0, 0, SDEB_I_MODE_SELECT, SDEB_I_RESERVE,
433 SDEB_I_RELEASE,
434 0, 0, SDEB_I_MODE_SENSE, 0, 0, 0, 0, 0,
435/* 0x60; 0x60->0x7d are reserved, 0x7e is "extended cdb" */
436 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
437 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
438 0, SDEB_I_VARIABLE_LEN,
439/* 0x80; 0x80->0x9f: 16 byte cdbs */
440 0, 0, 0, 0, 0, SDEB_I_ATA_PT, 0, 0,
441 SDEB_I_READ, SDEB_I_COMP_WRITE, SDEB_I_WRITE, 0,
442 0, 0, 0, SDEB_I_VERIFY,
443 SDEB_I_PRE_FETCH, SDEB_I_SYNC_CACHE, 0, SDEB_I_WRITE_SAME,
444 SDEB_I_ZONE_OUT, SDEB_I_ZONE_IN, 0, 0,
445 0, 0, 0, 0, 0, 0, SDEB_I_SERV_ACT_IN_16, SDEB_I_SERV_ACT_OUT_16,
446/* 0xa0; 0xa0->0xbf: 12 byte cdbs */
447 SDEB_I_REPORT_LUNS, SDEB_I_ATA_PT, 0, SDEB_I_MAINT_IN,
448 SDEB_I_MAINT_OUT, 0, 0, 0,
449 SDEB_I_READ, 0 /* SDEB_I_SERV_ACT_OUT_12 */, SDEB_I_WRITE,
450 0 /* SDEB_I_SERV_ACT_IN_12 */, 0, 0, 0, 0,
451 0, 0, 0, 0, 0, 0, 0, 0,
452 0, 0, 0, 0, 0, 0, 0, 0,
453/* 0xc0; 0xc0->0xff: vendor specific */
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 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
458};
459
460/*
461 * The following "response" functions return the SCSI mid-level's 4 byte
462 * tuple-in-an-int. To handle commands with an IMMED bit, for a faster
463 * command completion, they can mask their return value with
464 * SDEG_RES_IMMED_MASK .
465 */
466#define SDEG_RES_IMMED_MASK 0x40000000
467
468static int resp_inquiry(struct scsi_cmnd *, struct sdebug_dev_info *);
469static int resp_report_luns(struct scsi_cmnd *, struct sdebug_dev_info *);
470static int resp_requests(struct scsi_cmnd *, struct sdebug_dev_info *);
471static int resp_mode_sense(struct scsi_cmnd *, struct sdebug_dev_info *);
472static int resp_mode_select(struct scsi_cmnd *, struct sdebug_dev_info *);
473static int resp_log_sense(struct scsi_cmnd *, struct sdebug_dev_info *);
474static int resp_readcap(struct scsi_cmnd *, struct sdebug_dev_info *);
475static int resp_read_dt0(struct scsi_cmnd *, struct sdebug_dev_info *);
476static int resp_write_dt0(struct scsi_cmnd *, struct sdebug_dev_info *);
477static int resp_write_scat(struct scsi_cmnd *, struct sdebug_dev_info *);
478static int resp_start_stop(struct scsi_cmnd *, struct sdebug_dev_info *);
479static int resp_readcap16(struct scsi_cmnd *, struct sdebug_dev_info *);
480static int resp_get_lba_status(struct scsi_cmnd *, struct sdebug_dev_info *);
481static int resp_report_tgtpgs(struct scsi_cmnd *, struct sdebug_dev_info *);
482static int resp_unmap(struct scsi_cmnd *, struct sdebug_dev_info *);
483static int resp_rsup_opcodes(struct scsi_cmnd *, struct sdebug_dev_info *);
484static int resp_rsup_tmfs(struct scsi_cmnd *, struct sdebug_dev_info *);
485static int resp_verify(struct scsi_cmnd *, struct sdebug_dev_info *);
486static int resp_write_same_10(struct scsi_cmnd *, struct sdebug_dev_info *);
487static int resp_write_same_16(struct scsi_cmnd *, struct sdebug_dev_info *);
488static int resp_comp_write(struct scsi_cmnd *, struct sdebug_dev_info *);
489static int resp_write_buffer(struct scsi_cmnd *, struct sdebug_dev_info *);
490static int resp_sync_cache(struct scsi_cmnd *, struct sdebug_dev_info *);
491static int resp_pre_fetch(struct scsi_cmnd *, struct sdebug_dev_info *);
492static int resp_report_zones(struct scsi_cmnd *, struct sdebug_dev_info *);
493static int resp_open_zone(struct scsi_cmnd *, struct sdebug_dev_info *);
494static int resp_close_zone(struct scsi_cmnd *, struct sdebug_dev_info *);
495static int resp_finish_zone(struct scsi_cmnd *, struct sdebug_dev_info *);
496static int resp_rwp_zone(struct scsi_cmnd *, struct sdebug_dev_info *);
497
498static int sdebug_do_add_host(bool mk_new_store);
499static int sdebug_add_host_helper(int per_host_idx);
500static void sdebug_do_remove_host(bool the_end);
501static int sdebug_add_store(void);
502static void sdebug_erase_store(int idx, struct sdeb_store_info *sip);
503static void sdebug_erase_all_stores(bool apart_from_first);
504
505/*
506 * The following are overflow arrays for cdbs that "hit" the same index in
507 * the opcode_info_arr array. The most time sensitive (or commonly used) cdb
508 * should be placed in opcode_info_arr[], the others should be placed here.
509 */
510static const struct opcode_info_t msense_iarr[] = {
511 {0, 0x1a, 0, F_D_IN, NULL, NULL,
512 {6, 0xe8, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
513};
514
515static const struct opcode_info_t mselect_iarr[] = {
516 {0, 0x15, 0, F_D_OUT, NULL, NULL,
517 {6, 0xf1, 0, 0, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
518};
519
520static const struct opcode_info_t read_iarr[] = {
521 {0, 0x28, 0, F_D_IN | FF_MEDIA_IO, resp_read_dt0, NULL,/* READ(10) */
522 {10, 0xff, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xff, 0xff, 0xc7, 0, 0,
523 0, 0, 0, 0} },
524 {0, 0x8, 0, F_D_IN | FF_MEDIA_IO, resp_read_dt0, NULL, /* READ(6) */
525 {6, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
526 {0, 0xa8, 0, F_D_IN | FF_MEDIA_IO, resp_read_dt0, NULL,/* READ(12) */
527 {12, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xbf,
528 0xc7, 0, 0, 0, 0} },
529};
530
531static const struct opcode_info_t write_iarr[] = {
532 {0, 0x2a, 0, F_D_OUT | FF_MEDIA_IO, resp_write_dt0, /* WRITE(10) */
533 NULL, {10, 0xfb, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xff, 0xff, 0xc7,
534 0, 0, 0, 0, 0, 0} },
535 {0, 0xa, 0, F_D_OUT | FF_MEDIA_IO, resp_write_dt0, /* WRITE(6) */
536 NULL, {6, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0,
537 0, 0, 0} },
538 {0, 0xaa, 0, F_D_OUT | FF_MEDIA_IO, resp_write_dt0, /* WRITE(12) */
539 NULL, {12, 0xfb, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
540 0xbf, 0xc7, 0, 0, 0, 0} },
541};
542
543static const struct opcode_info_t verify_iarr[] = {
544 {0, 0x2f, 0, F_D_OUT_MAYBE | FF_MEDIA_IO, resp_verify,/* VERIFY(10) */
545 NULL, {10, 0xf7, 0xff, 0xff, 0xff, 0xff, 0xbf, 0xff, 0xff, 0xc7,
546 0, 0, 0, 0, 0, 0} },
547};
548
549static const struct opcode_info_t sa_in_16_iarr[] = {
550 {0, 0x9e, 0x12, F_SA_LOW | F_D_IN, resp_get_lba_status, NULL,
551 {16, 0x12, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
552 0xff, 0xff, 0xff, 0, 0xc7} }, /* GET LBA STATUS(16) */
553};
554
555static const struct opcode_info_t vl_iarr[] = { /* VARIABLE LENGTH */
556 {0, 0x7f, 0xb, F_SA_HIGH | F_D_OUT | FF_MEDIA_IO, resp_write_dt0,
557 NULL, {32, 0xc7, 0, 0, 0, 0, 0x3f, 0x18, 0x0, 0xb, 0xfa,
558 0, 0xff, 0xff, 0xff, 0xff} }, /* WRITE(32) */
559 {0, 0x7f, 0x11, F_SA_HIGH | F_D_OUT | FF_MEDIA_IO, resp_write_scat,
560 NULL, {32, 0xc7, 0, 0, 0, 0, 0x3f, 0x18, 0x0, 0x11, 0xf8,
561 0, 0xff, 0xff, 0x0, 0x0} }, /* WRITE SCATTERED(32) */
562};
563
564static const struct opcode_info_t maint_in_iarr[] = { /* MAINT IN */
565 {0, 0xa3, 0xc, F_SA_LOW | F_D_IN, resp_rsup_opcodes, NULL,
566 {12, 0xc, 0x87, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0,
567 0xc7, 0, 0, 0, 0} }, /* REPORT SUPPORTED OPERATION CODES */
568 {0, 0xa3, 0xd, F_SA_LOW | F_D_IN, resp_rsup_tmfs, NULL,
569 {12, 0xd, 0x80, 0, 0, 0, 0xff, 0xff, 0xff, 0xff, 0, 0xc7, 0, 0,
570 0, 0} }, /* REPORTED SUPPORTED TASK MANAGEMENT FUNCTIONS */
571};
572
573static const struct opcode_info_t write_same_iarr[] = {
574 {0, 0x93, 0, F_D_OUT_MAYBE | FF_MEDIA_IO, resp_write_same_16, NULL,
575 {16, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
576 0xff, 0xff, 0xff, 0x3f, 0xc7} }, /* WRITE SAME(16) */
577};
578
579static const struct opcode_info_t reserve_iarr[] = {
580 {0, 0x16, 0, F_D_OUT, NULL, NULL, /* RESERVE(6) */
581 {6, 0x1f, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
582};
583
584static const struct opcode_info_t release_iarr[] = {
585 {0, 0x17, 0, F_D_OUT, NULL, NULL, /* RELEASE(6) */
586 {6, 0x1f, 0xff, 0, 0, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
587};
588
589static const struct opcode_info_t sync_cache_iarr[] = {
590 {0, 0x91, 0, F_SYNC_DELAY | F_M_ACCESS, resp_sync_cache, NULL,
591 {16, 0x6, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
592 0xff, 0xff, 0xff, 0xff, 0x3f, 0xc7} }, /* SYNC_CACHE (16) */
593};
594
595static const struct opcode_info_t pre_fetch_iarr[] = {
596 {0, 0x90, 0, F_SYNC_DELAY | FF_MEDIA_IO, resp_pre_fetch, NULL,
597 {16, 0x2, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
598 0xff, 0xff, 0xff, 0xff, 0x3f, 0xc7} }, /* PRE-FETCH (16) */
599};
600
601static const struct opcode_info_t zone_out_iarr[] = { /* ZONE OUT(16) */
602 {0, 0x94, 0x1, F_SA_LOW | F_M_ACCESS, resp_close_zone, NULL,
603 {16, 0x1, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
604 0xff, 0, 0, 0xff, 0xff, 0x1, 0xc7} }, /* CLOSE ZONE */
605 {0, 0x94, 0x2, F_SA_LOW | F_M_ACCESS, resp_finish_zone, NULL,
606 {16, 0x2, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
607 0xff, 0, 0, 0xff, 0xff, 0x1, 0xc7} }, /* FINISH ZONE */
608 {0, 0x94, 0x4, F_SA_LOW | F_M_ACCESS, resp_rwp_zone, NULL,
609 {16, 0x4, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
610 0xff, 0, 0, 0xff, 0xff, 0x1, 0xc7} }, /* RESET WRITE POINTER */
611};
612
613static const struct opcode_info_t zone_in_iarr[] = { /* ZONE IN(16) */
614 {0, 0x95, 0x6, F_SA_LOW | F_D_IN | F_M_ACCESS, NULL, NULL,
615 {16, 0x6, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
616 0xff, 0xff, 0xff, 0xff, 0x3f, 0xc7} }, /* REPORT ZONES */
617};
618
619
620/* This array is accessed via SDEB_I_* values. Make sure all are mapped,
621 * plus the terminating elements for logic that scans this table such as
622 * REPORT SUPPORTED OPERATION CODES. */
623static const struct opcode_info_t opcode_info_arr[SDEB_I_LAST_ELEM_P1 + 1] = {
624/* 0 */
625 {0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL, /* unknown opcodes */
626 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
627 {0, 0x12, 0, FF_RESPOND | F_D_IN, resp_inquiry, NULL, /* INQUIRY */
628 {6, 0xe3, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
629 {0, 0xa0, 0, FF_RESPOND | F_D_IN, resp_report_luns, NULL,
630 {12, 0xe3, 0xff, 0, 0, 0, 0xff, 0xff, 0xff, 0xff, 0, 0xc7, 0, 0,
631 0, 0} }, /* REPORT LUNS */
632 {0, 0x3, 0, FF_RESPOND | F_D_IN, resp_requests, NULL,
633 {6, 0xe1, 0, 0, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
634 {0, 0x0, 0, F_M_ACCESS | F_RL_WLUN_OK, NULL, NULL,/* TEST UNIT READY */
635 {6, 0, 0, 0, 0, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
636/* 5 */
637 {ARRAY_SIZE(msense_iarr), 0x5a, 0, F_D_IN, /* MODE SENSE(10) */
638 resp_mode_sense, msense_iarr, {10, 0xf8, 0xff, 0xff, 0, 0, 0,
639 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0} },
640 {ARRAY_SIZE(mselect_iarr), 0x55, 0, F_D_OUT, /* MODE SELECT(10) */
641 resp_mode_select, mselect_iarr, {10, 0xf1, 0, 0, 0, 0, 0, 0xff,
642 0xff, 0xc7, 0, 0, 0, 0, 0, 0} },
643 {0, 0x4d, 0, F_D_IN, resp_log_sense, NULL, /* LOG SENSE */
644 {10, 0xe3, 0xff, 0xff, 0, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0,
645 0, 0, 0} },
646 {0, 0x25, 0, F_D_IN, resp_readcap, NULL, /* READ CAPACITY(10) */
647 {10, 0xe1, 0xff, 0xff, 0xff, 0xff, 0, 0, 0x1, 0xc7, 0, 0, 0, 0,
648 0, 0} },
649 {ARRAY_SIZE(read_iarr), 0x88, 0, F_D_IN | FF_MEDIA_IO, /* READ(16) */
650 resp_read_dt0, read_iarr, {16, 0xfe, 0xff, 0xff, 0xff, 0xff,
651 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc7} },
652/* 10 */
653 {ARRAY_SIZE(write_iarr), 0x8a, 0, F_D_OUT | FF_MEDIA_IO,
654 resp_write_dt0, write_iarr, /* WRITE(16) */
655 {16, 0xfa, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
656 0xff, 0xff, 0xff, 0xff, 0xff, 0xc7} },
657 {0, 0x1b, 0, F_SSU_DELAY, resp_start_stop, NULL,/* START STOP UNIT */
658 {6, 0x1, 0, 0xf, 0xf7, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
659 {ARRAY_SIZE(sa_in_16_iarr), 0x9e, 0x10, F_SA_LOW | F_D_IN,
660 resp_readcap16, sa_in_16_iarr, /* SA_IN(16), READ CAPACITY(16) */
661 {16, 0x10, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
662 0xff, 0xff, 0xff, 0xff, 0x1, 0xc7} },
663 {0, 0x9f, 0x12, F_SA_LOW | F_D_OUT | FF_MEDIA_IO, resp_write_scat,
664 NULL, {16, 0x12, 0xf9, 0x0, 0xff, 0xff, 0, 0, 0xff, 0xff, 0xff,
665 0xff, 0xff, 0xff, 0xff, 0xc7} }, /* SA_OUT(16), WRITE SCAT(16) */
666 {ARRAY_SIZE(maint_in_iarr), 0xa3, 0xa, F_SA_LOW | F_D_IN,
667 resp_report_tgtpgs, /* MAINT IN, REPORT TARGET PORT GROUPS */
668 maint_in_iarr, {12, 0xea, 0, 0, 0, 0, 0xff, 0xff, 0xff,
669 0xff, 0, 0xc7, 0, 0, 0, 0} },
670/* 15 */
671 {0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL, /* MAINT OUT */
672 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
673 {ARRAY_SIZE(verify_iarr), 0x8f, 0,
674 F_D_OUT_MAYBE | FF_MEDIA_IO, resp_verify, /* VERIFY(16) */
675 verify_iarr, {16, 0xf6, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
676 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xc7} },
677 {ARRAY_SIZE(vl_iarr), 0x7f, 0x9, F_SA_HIGH | F_D_IN | FF_MEDIA_IO,
678 resp_read_dt0, vl_iarr, /* VARIABLE LENGTH, READ(32) */
679 {32, 0xc7, 0, 0, 0, 0, 0x3f, 0x18, 0x0, 0x9, 0xfe, 0, 0xff, 0xff,
680 0xff, 0xff} },
681 {ARRAY_SIZE(reserve_iarr), 0x56, 0, F_D_OUT,
682 NULL, reserve_iarr, /* RESERVE(10) <no response function> */
683 {10, 0xff, 0xff, 0xff, 0, 0, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0,
684 0} },
685 {ARRAY_SIZE(release_iarr), 0x57, 0, F_D_OUT,
686 NULL, release_iarr, /* RELEASE(10) <no response function> */
687 {10, 0x13, 0xff, 0xff, 0, 0, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0,
688 0} },
689/* 20 */
690 {0, 0x1e, 0, 0, NULL, NULL, /* ALLOW REMOVAL */
691 {6, 0, 0, 0, 0x3, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
692 {0, 0x1, 0, 0, resp_start_stop, NULL, /* REWIND ?? */
693 {6, 0x1, 0, 0, 0, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
694 {0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL, /* ATA_PT */
695 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
696 {0, 0x1d, F_D_OUT, 0, NULL, NULL, /* SEND DIAGNOSTIC */
697 {6, 0xf7, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
698 {0, 0x42, 0, F_D_OUT | FF_MEDIA_IO, resp_unmap, NULL, /* UNMAP */
699 {10, 0x1, 0, 0, 0, 0, 0x3f, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0} },
700/* 25 */
701 {0, 0x3b, 0, F_D_OUT_MAYBE, resp_write_buffer, NULL,
702 {10, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0,
703 0, 0, 0, 0} }, /* WRITE_BUFFER */
704 {ARRAY_SIZE(write_same_iarr), 0x41, 0, F_D_OUT_MAYBE | FF_MEDIA_IO,
705 resp_write_same_10, write_same_iarr, /* WRITE SAME(10) */
706 {10, 0xff, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xff, 0xff, 0xc7, 0,
707 0, 0, 0, 0, 0} },
708 {ARRAY_SIZE(sync_cache_iarr), 0x35, 0, F_SYNC_DELAY | F_M_ACCESS,
709 resp_sync_cache, sync_cache_iarr,
710 {10, 0x7, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xff, 0xff, 0xc7, 0, 0,
711 0, 0, 0, 0} }, /* SYNC_CACHE (10) */
712 {0, 0x89, 0, F_D_OUT | FF_MEDIA_IO, resp_comp_write, NULL,
713 {16, 0xf8, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0, 0,
714 0, 0xff, 0x3f, 0xc7} }, /* COMPARE AND WRITE */
715 {ARRAY_SIZE(pre_fetch_iarr), 0x34, 0, F_SYNC_DELAY | FF_MEDIA_IO,
716 resp_pre_fetch, pre_fetch_iarr,
717 {10, 0x2, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xff, 0xff, 0xc7, 0, 0,
718 0, 0, 0, 0} }, /* PRE-FETCH (10) */
719
720/* 30 */
721 {ARRAY_SIZE(zone_out_iarr), 0x94, 0x3, F_SA_LOW | F_M_ACCESS,
722 resp_open_zone, zone_out_iarr, /* ZONE_OUT(16), OPEN ZONE) */
723 {16, 0x3 /* SA */, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
724 0xff, 0xff, 0x0, 0x0, 0xff, 0xff, 0x1, 0xc7} },
725 {ARRAY_SIZE(zone_in_iarr), 0x95, 0x0, F_SA_LOW | F_M_ACCESS,
726 resp_report_zones, zone_in_iarr, /* ZONE_IN(16), REPORT ZONES) */
727 {16, 0x0 /* SA */, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
728 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xbf, 0xc7} },
729/* sentinel */
730 {0xff, 0, 0, 0, NULL, NULL, /* terminating element */
731 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
732};
733
734static int sdebug_num_hosts;
735static int sdebug_add_host = DEF_NUM_HOST; /* in sysfs this is relative */
736static int sdebug_ato = DEF_ATO;
737static int sdebug_cdb_len = DEF_CDB_LEN;
738static int sdebug_jdelay = DEF_JDELAY; /* if > 0 then unit is jiffies */
739static int sdebug_dev_size_mb = DEF_DEV_SIZE_PRE_INIT;
740static int sdebug_dif = DEF_DIF;
741static int sdebug_dix = DEF_DIX;
742static int sdebug_dsense = DEF_D_SENSE;
743static int sdebug_every_nth = DEF_EVERY_NTH;
744static int sdebug_fake_rw = DEF_FAKE_RW;
745static unsigned int sdebug_guard = DEF_GUARD;
746static int sdebug_host_max_queue; /* per host */
747static int sdebug_lowest_aligned = DEF_LOWEST_ALIGNED;
748static int sdebug_max_luns = DEF_MAX_LUNS;
749static int sdebug_max_queue = SDEBUG_CANQUEUE; /* per submit queue */
750static unsigned int sdebug_medium_error_start = OPT_MEDIUM_ERR_ADDR;
751static int sdebug_medium_error_count = OPT_MEDIUM_ERR_NUM;
752static atomic_t retired_max_queue; /* if > 0 then was prior max_queue */
753static int sdebug_ndelay = DEF_NDELAY; /* if > 0 then unit is nanoseconds */
754static int sdebug_no_lun_0 = DEF_NO_LUN_0;
755static int sdebug_no_uld;
756static int sdebug_num_parts = DEF_NUM_PARTS;
757static int sdebug_num_tgts = DEF_NUM_TGTS; /* targets per host */
758static int sdebug_opt_blks = DEF_OPT_BLKS;
759static int sdebug_opts = DEF_OPTS;
760static int sdebug_physblk_exp = DEF_PHYSBLK_EXP;
761static int sdebug_opt_xferlen_exp = DEF_OPT_XFERLEN_EXP;
762static int sdebug_ptype = DEF_PTYPE; /* SCSI peripheral device type */
763static int sdebug_scsi_level = DEF_SCSI_LEVEL;
764static int sdebug_sector_size = DEF_SECTOR_SIZE;
765static int sdeb_tur_ms_to_ready = DEF_TUR_MS_TO_READY;
766static int sdebug_virtual_gb = DEF_VIRTUAL_GB;
767static int sdebug_vpd_use_hostno = DEF_VPD_USE_HOSTNO;
768static unsigned int sdebug_lbpu = DEF_LBPU;
769static unsigned int sdebug_lbpws = DEF_LBPWS;
770static unsigned int sdebug_lbpws10 = DEF_LBPWS10;
771static unsigned int sdebug_lbprz = DEF_LBPRZ;
772static unsigned int sdebug_unmap_alignment = DEF_UNMAP_ALIGNMENT;
773static unsigned int sdebug_unmap_granularity = DEF_UNMAP_GRANULARITY;
774static unsigned int sdebug_unmap_max_blocks = DEF_UNMAP_MAX_BLOCKS;
775static unsigned int sdebug_unmap_max_desc = DEF_UNMAP_MAX_DESC;
776static unsigned int sdebug_write_same_length = DEF_WRITESAME_LENGTH;
777static int sdebug_uuid_ctl = DEF_UUID_CTL;
778static bool sdebug_random = DEF_RANDOM;
779static bool sdebug_per_host_store = DEF_PER_HOST_STORE;
780static bool sdebug_removable = DEF_REMOVABLE;
781static bool sdebug_clustering;
782static bool sdebug_host_lock = DEF_HOST_LOCK;
783static bool sdebug_strict = DEF_STRICT;
784static bool sdebug_any_injecting_opt;
785static bool sdebug_verbose;
786static bool have_dif_prot;
787static bool write_since_sync;
788static bool sdebug_statistics = DEF_STATISTICS;
789static bool sdebug_wp;
790/* Following enum: 0: no zbc, def; 1: host aware; 2: host managed */
791static enum blk_zoned_model sdeb_zbc_model = BLK_ZONED_NONE;
792static char *sdeb_zbc_model_s;
793
794static unsigned int sdebug_store_sectors;
795static sector_t sdebug_capacity; /* in sectors */
796
797/* old BIOS stuff, kernel may get rid of them but some mode sense pages
798 may still need them */
799static int sdebug_heads; /* heads per disk */
800static int sdebug_cylinders_per; /* cylinders per surface */
801static int sdebug_sectors_per; /* sectors per cylinder */
802
803static LIST_HEAD(sdebug_host_list);
804static DEFINE_SPINLOCK(sdebug_host_list_lock);
805
806static struct xarray per_store_arr;
807static struct xarray *per_store_ap = &per_store_arr;
808static int sdeb_first_idx = -1; /* invalid index ==> none created */
809static int sdeb_most_recent_idx = -1;
810static DEFINE_RWLOCK(sdeb_fake_rw_lck); /* need a RW lock when fake_rw=1 */
811
812static unsigned long map_size;
813static int num_aborts;
814static int num_dev_resets;
815static int num_target_resets;
816static int num_bus_resets;
817static int num_host_resets;
818static int dix_writes;
819static int dix_reads;
820static int dif_errors;
821
822/* ZBC global data */
823static bool sdeb_zbc_in_use; /* true for host-aware and host-managed disks */
824static int sdeb_zbc_zone_size_mb;
825static int sdeb_zbc_max_open = DEF_ZBC_MAX_OPEN_ZONES;
826static int sdeb_zbc_nr_conv = DEF_ZBC_NR_CONV_ZONES;
827
828static int submit_queues = DEF_SUBMIT_QUEUES; /* > 1 for multi-queue (mq) */
829static struct sdebug_queue *sdebug_q_arr; /* ptr to array of submit queues */
830
831static DEFINE_RWLOCK(atomic_rw);
832static DEFINE_RWLOCK(atomic_rw2);
833
834static rwlock_t *ramdisk_lck_a[2];
835
836static char sdebug_proc_name[] = MY_NAME;
837static const char *my_name = MY_NAME;
838
839static struct bus_type pseudo_lld_bus;
840
841static struct device_driver sdebug_driverfs_driver = {
842 .name = sdebug_proc_name,
843 .bus = &pseudo_lld_bus,
844};
845
846static const int check_condition_result =
847 (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
848
849static const int illegal_condition_result =
850 (DRIVER_SENSE << 24) | (DID_ABORT << 16) | SAM_STAT_CHECK_CONDITION;
851
852static const int device_qfull_result =
853 (DID_OK << 16) | (COMMAND_COMPLETE << 8) | SAM_STAT_TASK_SET_FULL;
854
855static const int condition_met_result = SAM_STAT_CONDITION_MET;
856
857
858/* Only do the extra work involved in logical block provisioning if one or
859 * more of the lbpu, lbpws or lbpws10 parameters are given and we are doing
860 * real reads and writes (i.e. not skipping them for speed).
861 */
862static inline bool scsi_debug_lbp(void)
863{
864 return 0 == sdebug_fake_rw &&
865 (sdebug_lbpu || sdebug_lbpws || sdebug_lbpws10);
866}
867
868static void *lba2fake_store(struct sdeb_store_info *sip,
869 unsigned long long lba)
870{
871 struct sdeb_store_info *lsip = sip;
872
873 lba = do_div(lba, sdebug_store_sectors);
874 if (!sip || !sip->storep) {
875 WARN_ON_ONCE(true);
876 lsip = xa_load(per_store_ap, 0); /* should never be NULL */
877 }
878 return lsip->storep + lba * sdebug_sector_size;
879}
880
881static struct t10_pi_tuple *dif_store(struct sdeb_store_info *sip,
882 sector_t sector)
883{
884 sector = sector_div(sector, sdebug_store_sectors);
885
886 return sip->dif_storep + sector;
887}
888
889static void sdebug_max_tgts_luns(void)
890{
891 struct sdebug_host_info *sdbg_host;
892 struct Scsi_Host *hpnt;
893
894 spin_lock(&sdebug_host_list_lock);
895 list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) {
896 hpnt = sdbg_host->shost;
897 if ((hpnt->this_id >= 0) &&
898 (sdebug_num_tgts > hpnt->this_id))
899 hpnt->max_id = sdebug_num_tgts + 1;
900 else
901 hpnt->max_id = sdebug_num_tgts;
902 /* sdebug_max_luns; */
903 hpnt->max_lun = SCSI_W_LUN_REPORT_LUNS + 1;
904 }
905 spin_unlock(&sdebug_host_list_lock);
906}
907
908enum sdeb_cmd_data {SDEB_IN_DATA = 0, SDEB_IN_CDB = 1};
909
910/* Set in_bit to -1 to indicate no bit position of invalid field */
911static void mk_sense_invalid_fld(struct scsi_cmnd *scp,
912 enum sdeb_cmd_data c_d,
913 int in_byte, int in_bit)
914{
915 unsigned char *sbuff;
916 u8 sks[4];
917 int sl, asc;
918
919 sbuff = scp->sense_buffer;
920 if (!sbuff) {
921 sdev_printk(KERN_ERR, scp->device,
922 "%s: sense_buffer is NULL\n", __func__);
923 return;
924 }
925 asc = c_d ? INVALID_FIELD_IN_CDB : INVALID_FIELD_IN_PARAM_LIST;
926 memset(sbuff, 0, SCSI_SENSE_BUFFERSIZE);
927 scsi_build_sense_buffer(sdebug_dsense, sbuff, ILLEGAL_REQUEST, asc, 0);
928 memset(sks, 0, sizeof(sks));
929 sks[0] = 0x80;
930 if (c_d)
931 sks[0] |= 0x40;
932 if (in_bit >= 0) {
933 sks[0] |= 0x8;
934 sks[0] |= 0x7 & in_bit;
935 }
936 put_unaligned_be16(in_byte, sks + 1);
937 if (sdebug_dsense) {
938 sl = sbuff[7] + 8;
939 sbuff[7] = sl;
940 sbuff[sl] = 0x2;
941 sbuff[sl + 1] = 0x6;
942 memcpy(sbuff + sl + 4, sks, 3);
943 } else
944 memcpy(sbuff + 15, sks, 3);
945 if (sdebug_verbose)
946 sdev_printk(KERN_INFO, scp->device, "%s: [sense_key,asc,ascq"
947 "]: [0x5,0x%x,0x0] %c byte=%d, bit=%d\n",
948 my_name, asc, c_d ? 'C' : 'D', in_byte, in_bit);
949}
950
951static void mk_sense_buffer(struct scsi_cmnd *scp, int key, int asc, int asq)
952{
953 unsigned char *sbuff;
954
955 sbuff = scp->sense_buffer;
956 if (!sbuff) {
957 sdev_printk(KERN_ERR, scp->device,
958 "%s: sense_buffer is NULL\n", __func__);
959 return;
960 }
961 memset(sbuff, 0, SCSI_SENSE_BUFFERSIZE);
962
963 scsi_build_sense_buffer(sdebug_dsense, sbuff, key, asc, asq);
964
965 if (sdebug_verbose)
966 sdev_printk(KERN_INFO, scp->device,
967 "%s: [sense_key,asc,ascq]: [0x%x,0x%x,0x%x]\n",
968 my_name, key, asc, asq);
969}
970
971static void mk_sense_invalid_opcode(struct scsi_cmnd *scp)
972{
973 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_OPCODE, 0);
974}
975
976static int scsi_debug_ioctl(struct scsi_device *dev, unsigned int cmd,
977 void __user *arg)
978{
979 if (sdebug_verbose) {
980 if (0x1261 == cmd)
981 sdev_printk(KERN_INFO, dev,
982 "%s: BLKFLSBUF [0x1261]\n", __func__);
983 else if (0x5331 == cmd)
984 sdev_printk(KERN_INFO, dev,
985 "%s: CDROM_GET_CAPABILITY [0x5331]\n",
986 __func__);
987 else
988 sdev_printk(KERN_INFO, dev, "%s: cmd=0x%x\n",
989 __func__, cmd);
990 }
991 return -EINVAL;
992 /* return -ENOTTY; // correct return but upsets fdisk */
993}
994
995static void config_cdb_len(struct scsi_device *sdev)
996{
997 switch (sdebug_cdb_len) {
998 case 6: /* suggest 6 byte READ, WRITE and MODE SENSE/SELECT */
999 sdev->use_10_for_rw = false;
1000 sdev->use_16_for_rw = false;
1001 sdev->use_10_for_ms = false;
1002 break;
1003 case 10: /* suggest 10 byte RWs and 6 byte MODE SENSE/SELECT */
1004 sdev->use_10_for_rw = true;
1005 sdev->use_16_for_rw = false;
1006 sdev->use_10_for_ms = false;
1007 break;
1008 case 12: /* suggest 10 byte RWs and 10 byte MODE SENSE/SELECT */
1009 sdev->use_10_for_rw = true;
1010 sdev->use_16_for_rw = false;
1011 sdev->use_10_for_ms = true;
1012 break;
1013 case 16:
1014 sdev->use_10_for_rw = false;
1015 sdev->use_16_for_rw = true;
1016 sdev->use_10_for_ms = true;
1017 break;
1018 case 32: /* No knobs to suggest this so same as 16 for now */
1019 sdev->use_10_for_rw = false;
1020 sdev->use_16_for_rw = true;
1021 sdev->use_10_for_ms = true;
1022 break;
1023 default:
1024 pr_warn("unexpected cdb_len=%d, force to 10\n",
1025 sdebug_cdb_len);
1026 sdev->use_10_for_rw = true;
1027 sdev->use_16_for_rw = false;
1028 sdev->use_10_for_ms = false;
1029 sdebug_cdb_len = 10;
1030 break;
1031 }
1032}
1033
1034static void all_config_cdb_len(void)
1035{
1036 struct sdebug_host_info *sdbg_host;
1037 struct Scsi_Host *shost;
1038 struct scsi_device *sdev;
1039
1040 spin_lock(&sdebug_host_list_lock);
1041 list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) {
1042 shost = sdbg_host->shost;
1043 shost_for_each_device(sdev, shost) {
1044 config_cdb_len(sdev);
1045 }
1046 }
1047 spin_unlock(&sdebug_host_list_lock);
1048}
1049
1050static void clear_luns_changed_on_target(struct sdebug_dev_info *devip)
1051{
1052 struct sdebug_host_info *sdhp;
1053 struct sdebug_dev_info *dp;
1054
1055 spin_lock(&sdebug_host_list_lock);
1056 list_for_each_entry(sdhp, &sdebug_host_list, host_list) {
1057 list_for_each_entry(dp, &sdhp->dev_info_list, dev_list) {
1058 if ((devip->sdbg_host == dp->sdbg_host) &&
1059 (devip->target == dp->target))
1060 clear_bit(SDEBUG_UA_LUNS_CHANGED, dp->uas_bm);
1061 }
1062 }
1063 spin_unlock(&sdebug_host_list_lock);
1064}
1065
1066static int make_ua(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
1067{
1068 int k;
1069
1070 k = find_first_bit(devip->uas_bm, SDEBUG_NUM_UAS);
1071 if (k != SDEBUG_NUM_UAS) {
1072 const char *cp = NULL;
1073
1074 switch (k) {
1075 case SDEBUG_UA_POR:
1076 mk_sense_buffer(scp, UNIT_ATTENTION, UA_RESET_ASC,
1077 POWER_ON_RESET_ASCQ);
1078 if (sdebug_verbose)
1079 cp = "power on reset";
1080 break;
1081 case SDEBUG_UA_BUS_RESET:
1082 mk_sense_buffer(scp, UNIT_ATTENTION, UA_RESET_ASC,
1083 BUS_RESET_ASCQ);
1084 if (sdebug_verbose)
1085 cp = "bus reset";
1086 break;
1087 case SDEBUG_UA_MODE_CHANGED:
1088 mk_sense_buffer(scp, UNIT_ATTENTION, UA_CHANGED_ASC,
1089 MODE_CHANGED_ASCQ);
1090 if (sdebug_verbose)
1091 cp = "mode parameters changed";
1092 break;
1093 case SDEBUG_UA_CAPACITY_CHANGED:
1094 mk_sense_buffer(scp, UNIT_ATTENTION, UA_CHANGED_ASC,
1095 CAPACITY_CHANGED_ASCQ);
1096 if (sdebug_verbose)
1097 cp = "capacity data changed";
1098 break;
1099 case SDEBUG_UA_MICROCODE_CHANGED:
1100 mk_sense_buffer(scp, UNIT_ATTENTION,
1101 TARGET_CHANGED_ASC,
1102 MICROCODE_CHANGED_ASCQ);
1103 if (sdebug_verbose)
1104 cp = "microcode has been changed";
1105 break;
1106 case SDEBUG_UA_MICROCODE_CHANGED_WO_RESET:
1107 mk_sense_buffer(scp, UNIT_ATTENTION,
1108 TARGET_CHANGED_ASC,
1109 MICROCODE_CHANGED_WO_RESET_ASCQ);
1110 if (sdebug_verbose)
1111 cp = "microcode has been changed without reset";
1112 break;
1113 case SDEBUG_UA_LUNS_CHANGED:
1114 /*
1115 * SPC-3 behavior is to report a UNIT ATTENTION with
1116 * ASC/ASCQ REPORTED LUNS DATA HAS CHANGED on every LUN
1117 * on the target, until a REPORT LUNS command is
1118 * received. SPC-4 behavior is to report it only once.
1119 * NOTE: sdebug_scsi_level does not use the same
1120 * values as struct scsi_device->scsi_level.
1121 */
1122 if (sdebug_scsi_level >= 6) /* SPC-4 and above */
1123 clear_luns_changed_on_target(devip);
1124 mk_sense_buffer(scp, UNIT_ATTENTION,
1125 TARGET_CHANGED_ASC,
1126 LUNS_CHANGED_ASCQ);
1127 if (sdebug_verbose)
1128 cp = "reported luns data has changed";
1129 break;
1130 default:
1131 pr_warn("unexpected unit attention code=%d\n", k);
1132 if (sdebug_verbose)
1133 cp = "unknown";
1134 break;
1135 }
1136 clear_bit(k, devip->uas_bm);
1137 if (sdebug_verbose)
1138 sdev_printk(KERN_INFO, scp->device,
1139 "%s reports: Unit attention: %s\n",
1140 my_name, cp);
1141 return check_condition_result;
1142 }
1143 return 0;
1144}
1145
1146/* Build SCSI "data-in" buffer. Returns 0 if ok else (DID_ERROR << 16). */
1147static int fill_from_dev_buffer(struct scsi_cmnd *scp, unsigned char *arr,
1148 int arr_len)
1149{
1150 int act_len;
1151 struct scsi_data_buffer *sdb = &scp->sdb;
1152
1153 if (!sdb->length)
1154 return 0;
1155 if (scp->sc_data_direction != DMA_FROM_DEVICE)
1156 return DID_ERROR << 16;
1157
1158 act_len = sg_copy_from_buffer(sdb->table.sgl, sdb->table.nents,
1159 arr, arr_len);
1160 scsi_set_resid(scp, scsi_bufflen(scp) - act_len);
1161
1162 return 0;
1163}
1164
1165/* Partial build of SCSI "data-in" buffer. Returns 0 if ok else
1166 * (DID_ERROR << 16). Can write to offset in data-in buffer. If multiple
1167 * calls, not required to write in ascending offset order. Assumes resid
1168 * set to scsi_bufflen() prior to any calls.
1169 */
1170static int p_fill_from_dev_buffer(struct scsi_cmnd *scp, const void *arr,
1171 int arr_len, unsigned int off_dst)
1172{
1173 unsigned int act_len, n;
1174 struct scsi_data_buffer *sdb = &scp->sdb;
1175 off_t skip = off_dst;
1176
1177 if (sdb->length <= off_dst)
1178 return 0;
1179 if (scp->sc_data_direction != DMA_FROM_DEVICE)
1180 return DID_ERROR << 16;
1181
1182 act_len = sg_pcopy_from_buffer(sdb->table.sgl, sdb->table.nents,
1183 arr, arr_len, skip);
1184 pr_debug("%s: off_dst=%u, scsi_bufflen=%u, act_len=%u, resid=%d\n",
1185 __func__, off_dst, scsi_bufflen(scp), act_len,
1186 scsi_get_resid(scp));
1187 n = scsi_bufflen(scp) - (off_dst + act_len);
1188 scsi_set_resid(scp, min_t(int, scsi_get_resid(scp), n));
1189 return 0;
1190}
1191
1192/* Fetches from SCSI "data-out" buffer. Returns number of bytes fetched into
1193 * 'arr' or -1 if error.
1194 */
1195static int fetch_to_dev_buffer(struct scsi_cmnd *scp, unsigned char *arr,
1196 int arr_len)
1197{
1198 if (!scsi_bufflen(scp))
1199 return 0;
1200 if (scp->sc_data_direction != DMA_TO_DEVICE)
1201 return -1;
1202
1203 return scsi_sg_copy_to_buffer(scp, arr, arr_len);
1204}
1205
1206
1207static char sdebug_inq_vendor_id[9] = "Linux ";
1208static char sdebug_inq_product_id[17] = "scsi_debug ";
1209static char sdebug_inq_product_rev[5] = SDEBUG_VERSION;
1210/* Use some locally assigned NAAs for SAS addresses. */
1211static const u64 naa3_comp_a = 0x3222222000000000ULL;
1212static const u64 naa3_comp_b = 0x3333333000000000ULL;
1213static const u64 naa3_comp_c = 0x3111111000000000ULL;
1214
1215/* Device identification VPD page. Returns number of bytes placed in arr */
1216static int inquiry_vpd_83(unsigned char *arr, int port_group_id,
1217 int target_dev_id, int dev_id_num,
1218 const char *dev_id_str, int dev_id_str_len,
1219 const uuid_t *lu_name)
1220{
1221 int num, port_a;
1222 char b[32];
1223
1224 port_a = target_dev_id + 1;
1225 /* T10 vendor identifier field format (faked) */
1226 arr[0] = 0x2; /* ASCII */
1227 arr[1] = 0x1;
1228 arr[2] = 0x0;
1229 memcpy(&arr[4], sdebug_inq_vendor_id, 8);
1230 memcpy(&arr[12], sdebug_inq_product_id, 16);
1231 memcpy(&arr[28], dev_id_str, dev_id_str_len);
1232 num = 8 + 16 + dev_id_str_len;
1233 arr[3] = num;
1234 num += 4;
1235 if (dev_id_num >= 0) {
1236 if (sdebug_uuid_ctl) {
1237 /* Locally assigned UUID */
1238 arr[num++] = 0x1; /* binary (not necessarily sas) */
1239 arr[num++] = 0xa; /* PIV=0, lu, naa */
1240 arr[num++] = 0x0;
1241 arr[num++] = 0x12;
1242 arr[num++] = 0x10; /* uuid type=1, locally assigned */
1243 arr[num++] = 0x0;
1244 memcpy(arr + num, lu_name, 16);
1245 num += 16;
1246 } else {
1247 /* NAA-3, Logical unit identifier (binary) */
1248 arr[num++] = 0x1; /* binary (not necessarily sas) */
1249 arr[num++] = 0x3; /* PIV=0, lu, naa */
1250 arr[num++] = 0x0;
1251 arr[num++] = 0x8;
1252 put_unaligned_be64(naa3_comp_b + dev_id_num, arr + num);
1253 num += 8;
1254 }
1255 /* Target relative port number */
1256 arr[num++] = 0x61; /* proto=sas, binary */
1257 arr[num++] = 0x94; /* PIV=1, target port, rel port */
1258 arr[num++] = 0x0; /* reserved */
1259 arr[num++] = 0x4; /* length */
1260 arr[num++] = 0x0; /* reserved */
1261 arr[num++] = 0x0; /* reserved */
1262 arr[num++] = 0x0;
1263 arr[num++] = 0x1; /* relative port A */
1264 }
1265 /* NAA-3, Target port identifier */
1266 arr[num++] = 0x61; /* proto=sas, binary */
1267 arr[num++] = 0x93; /* piv=1, target port, naa */
1268 arr[num++] = 0x0;
1269 arr[num++] = 0x8;
1270 put_unaligned_be64(naa3_comp_a + port_a, arr + num);
1271 num += 8;
1272 /* NAA-3, Target port group identifier */
1273 arr[num++] = 0x61; /* proto=sas, binary */
1274 arr[num++] = 0x95; /* piv=1, target port group id */
1275 arr[num++] = 0x0;
1276 arr[num++] = 0x4;
1277 arr[num++] = 0;
1278 arr[num++] = 0;
1279 put_unaligned_be16(port_group_id, arr + num);
1280 num += 2;
1281 /* NAA-3, Target device identifier */
1282 arr[num++] = 0x61; /* proto=sas, binary */
1283 arr[num++] = 0xa3; /* piv=1, target device, naa */
1284 arr[num++] = 0x0;
1285 arr[num++] = 0x8;
1286 put_unaligned_be64(naa3_comp_a + target_dev_id, arr + num);
1287 num += 8;
1288 /* SCSI name string: Target device identifier */
1289 arr[num++] = 0x63; /* proto=sas, UTF-8 */
1290 arr[num++] = 0xa8; /* piv=1, target device, SCSI name string */
1291 arr[num++] = 0x0;
1292 arr[num++] = 24;
1293 memcpy(arr + num, "naa.32222220", 12);
1294 num += 12;
1295 snprintf(b, sizeof(b), "%08X", target_dev_id);
1296 memcpy(arr + num, b, 8);
1297 num += 8;
1298 memset(arr + num, 0, 4);
1299 num += 4;
1300 return num;
1301}
1302
1303static unsigned char vpd84_data[] = {
1304/* from 4th byte */ 0x22,0x22,0x22,0x0,0xbb,0x0,
1305 0x22,0x22,0x22,0x0,0xbb,0x1,
1306 0x22,0x22,0x22,0x0,0xbb,0x2,
1307};
1308
1309/* Software interface identification VPD page */
1310static int inquiry_vpd_84(unsigned char *arr)
1311{
1312 memcpy(arr, vpd84_data, sizeof(vpd84_data));
1313 return sizeof(vpd84_data);
1314}
1315
1316/* Management network addresses VPD page */
1317static int inquiry_vpd_85(unsigned char *arr)
1318{
1319 int num = 0;
1320 const char *na1 = "https://www.kernel.org/config";
1321 const char *na2 = "http://www.kernel.org/log";
1322 int plen, olen;
1323
1324 arr[num++] = 0x1; /* lu, storage config */
1325 arr[num++] = 0x0; /* reserved */
1326 arr[num++] = 0x0;
1327 olen = strlen(na1);
1328 plen = olen + 1;
1329 if (plen % 4)
1330 plen = ((plen / 4) + 1) * 4;
1331 arr[num++] = plen; /* length, null termianted, padded */
1332 memcpy(arr + num, na1, olen);
1333 memset(arr + num + olen, 0, plen - olen);
1334 num += plen;
1335
1336 arr[num++] = 0x4; /* lu, logging */
1337 arr[num++] = 0x0; /* reserved */
1338 arr[num++] = 0x0;
1339 olen = strlen(na2);
1340 plen = olen + 1;
1341 if (plen % 4)
1342 plen = ((plen / 4) + 1) * 4;
1343 arr[num++] = plen; /* length, null terminated, padded */
1344 memcpy(arr + num, na2, olen);
1345 memset(arr + num + olen, 0, plen - olen);
1346 num += plen;
1347
1348 return num;
1349}
1350
1351/* SCSI ports VPD page */
1352static int inquiry_vpd_88(unsigned char *arr, int target_dev_id)
1353{
1354 int num = 0;
1355 int port_a, port_b;
1356
1357 port_a = target_dev_id + 1;
1358 port_b = port_a + 1;
1359 arr[num++] = 0x0; /* reserved */
1360 arr[num++] = 0x0; /* reserved */
1361 arr[num++] = 0x0;
1362 arr[num++] = 0x1; /* relative port 1 (primary) */
1363 memset(arr + num, 0, 6);
1364 num += 6;
1365 arr[num++] = 0x0;
1366 arr[num++] = 12; /* length tp descriptor */
1367 /* naa-5 target port identifier (A) */
1368 arr[num++] = 0x61; /* proto=sas, binary */
1369 arr[num++] = 0x93; /* PIV=1, target port, NAA */
1370 arr[num++] = 0x0; /* reserved */
1371 arr[num++] = 0x8; /* length */
1372 put_unaligned_be64(naa3_comp_a + port_a, arr + num);
1373 num += 8;
1374 arr[num++] = 0x0; /* reserved */
1375 arr[num++] = 0x0; /* reserved */
1376 arr[num++] = 0x0;
1377 arr[num++] = 0x2; /* relative port 2 (secondary) */
1378 memset(arr + num, 0, 6);
1379 num += 6;
1380 arr[num++] = 0x0;
1381 arr[num++] = 12; /* length tp descriptor */
1382 /* naa-5 target port identifier (B) */
1383 arr[num++] = 0x61; /* proto=sas, binary */
1384 arr[num++] = 0x93; /* PIV=1, target port, NAA */
1385 arr[num++] = 0x0; /* reserved */
1386 arr[num++] = 0x8; /* length */
1387 put_unaligned_be64(naa3_comp_a + port_b, arr + num);
1388 num += 8;
1389
1390 return num;
1391}
1392
1393
1394static unsigned char vpd89_data[] = {
1395/* from 4th byte */ 0,0,0,0,
1396'l','i','n','u','x',' ',' ',' ',
1397'S','A','T',' ','s','c','s','i','_','d','e','b','u','g',' ',' ',
1398'1','2','3','4',
13990x34,0,0,0,1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,
14000xec,0,0,0,
14010x5a,0xc,0xff,0x3f,0x37,0xc8,0x10,0,0,0,0,0,0x3f,0,0,0,
14020,0,0,0,0x58,0x58,0x58,0x58,0x58,0x58,0x58,0x58,0x20,0x20,0x20,0x20,
14030x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0,0,0,0x40,0x4,0,0x2e,0x33,
14040x38,0x31,0x20,0x20,0x20,0x20,0x54,0x53,0x38,0x33,0x30,0x30,0x33,0x31,
14050x53,0x41,
14060x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,
14070x20,0x20,
14080x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,
14090x10,0x80,
14100,0,0,0x2f,0,0,0,0x2,0,0x2,0x7,0,0xff,0xff,0x1,0,
14110x3f,0,0xc1,0xff,0x3e,0,0x10,0x1,0xb0,0xf8,0x50,0x9,0,0,0x7,0,
14120x3,0,0x78,0,0x78,0,0xf0,0,0x78,0,0,0,0,0,0,0,
14130,0,0,0,0,0,0,0,0x2,0,0,0,0,0,0,0,
14140x7e,0,0x1b,0,0x6b,0x34,0x1,0x7d,0x3,0x40,0x69,0x34,0x1,0x3c,0x3,0x40,
14150x7f,0x40,0,0,0,0,0xfe,0xfe,0,0,0,0,0,0xfe,0,0,
14160,0,0,0,0,0,0,0,0xb0,0xf8,0x50,0x9,0,0,0,0,
14170,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
14180,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
14190,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
14200x1,0,0xb0,0xf8,0x50,0x9,0xb0,0xf8,0x50,0x9,0x20,0x20,0x2,0,0xb6,0x42,
14210,0x80,0x8a,0,0x6,0x3c,0xa,0x3c,0xff,0xff,0xc6,0x7,0,0x1,0,0x8,
14220xf0,0xf,0,0x10,0x2,0,0x30,0,0,0,0,0,0,0,0x6,0xfe,
14230,0,0x2,0,0x50,0,0x8a,0,0x4f,0x95,0,0,0x21,0,0xb,0,
14240,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
14250,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
14260,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
14270,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
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,
14350,0,0,0,0,0,0,0,0,0,0,0,0,0,0xa5,0x51,
1436};
1437
1438/* ATA Information VPD page */
1439static int inquiry_vpd_89(unsigned char *arr)
1440{
1441 memcpy(arr, vpd89_data, sizeof(vpd89_data));
1442 return sizeof(vpd89_data);
1443}
1444
1445
1446static unsigned char vpdb0_data[] = {
1447 /* from 4th byte */ 0,0,0,4, 0,0,0x4,0, 0,0,0,64,
1448 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1449 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1450 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1451};
1452
1453/* Block limits VPD page (SBC-3) */
1454static int inquiry_vpd_b0(unsigned char *arr)
1455{
1456 unsigned int gran;
1457
1458 memcpy(arr, vpdb0_data, sizeof(vpdb0_data));
1459
1460 /* Optimal transfer length granularity */
1461 if (sdebug_opt_xferlen_exp != 0 &&
1462 sdebug_physblk_exp < sdebug_opt_xferlen_exp)
1463 gran = 1 << sdebug_opt_xferlen_exp;
1464 else
1465 gran = 1 << sdebug_physblk_exp;
1466 put_unaligned_be16(gran, arr + 2);
1467
1468 /* Maximum Transfer Length */
1469 if (sdebug_store_sectors > 0x400)
1470 put_unaligned_be32(sdebug_store_sectors, arr + 4);
1471
1472 /* Optimal Transfer Length */
1473 put_unaligned_be32(sdebug_opt_blks, &arr[8]);
1474
1475 if (sdebug_lbpu) {
1476 /* Maximum Unmap LBA Count */
1477 put_unaligned_be32(sdebug_unmap_max_blocks, &arr[16]);
1478
1479 /* Maximum Unmap Block Descriptor Count */
1480 put_unaligned_be32(sdebug_unmap_max_desc, &arr[20]);
1481 }
1482
1483 /* Unmap Granularity Alignment */
1484 if (sdebug_unmap_alignment) {
1485 put_unaligned_be32(sdebug_unmap_alignment, &arr[28]);
1486 arr[28] |= 0x80; /* UGAVALID */
1487 }
1488
1489 /* Optimal Unmap Granularity */
1490 put_unaligned_be32(sdebug_unmap_granularity, &arr[24]);
1491
1492 /* Maximum WRITE SAME Length */
1493 put_unaligned_be64(sdebug_write_same_length, &arr[32]);
1494
1495 return 0x3c; /* Mandatory page length for Logical Block Provisioning */
1496
1497 return sizeof(vpdb0_data);
1498}
1499
1500/* Block device characteristics VPD page (SBC-3) */
1501static int inquiry_vpd_b1(struct sdebug_dev_info *devip, unsigned char *arr)
1502{
1503 memset(arr, 0, 0x3c);
1504 arr[0] = 0;
1505 arr[1] = 1; /* non rotating medium (e.g. solid state) */
1506 arr[2] = 0;
1507 arr[3] = 5; /* less than 1.8" */
1508 if (devip->zmodel == BLK_ZONED_HA)
1509 arr[4] = 1 << 4; /* zoned field = 01b */
1510
1511 return 0x3c;
1512}
1513
1514/* Logical block provisioning VPD page (SBC-4) */
1515static int inquiry_vpd_b2(unsigned char *arr)
1516{
1517 memset(arr, 0, 0x4);
1518 arr[0] = 0; /* threshold exponent */
1519 if (sdebug_lbpu)
1520 arr[1] = 1 << 7;
1521 if (sdebug_lbpws)
1522 arr[1] |= 1 << 6;
1523 if (sdebug_lbpws10)
1524 arr[1] |= 1 << 5;
1525 if (sdebug_lbprz && scsi_debug_lbp())
1526 arr[1] |= (sdebug_lbprz & 0x7) << 2; /* sbc4r07 and later */
1527 /* anc_sup=0; dp=0 (no provisioning group descriptor) */
1528 /* minimum_percentage=0; provisioning_type=0 (unknown) */
1529 /* threshold_percentage=0 */
1530 return 0x4;
1531}
1532
1533/* Zoned block device characteristics VPD page (ZBC mandatory) */
1534static int inquiry_vpd_b6(struct sdebug_dev_info *devip, unsigned char *arr)
1535{
1536 memset(arr, 0, 0x3c);
1537 arr[0] = 0x1; /* set URSWRZ (unrestricted read in seq. wr req zone) */
1538 /*
1539 * Set Optimal number of open sequential write preferred zones and
1540 * Optimal number of non-sequentially written sequential write
1541 * preferred zones fields to 'not reported' (0xffffffff). Leave other
1542 * fields set to zero, apart from Max. number of open swrz_s field.
1543 */
1544 put_unaligned_be32(0xffffffff, &arr[4]);
1545 put_unaligned_be32(0xffffffff, &arr[8]);
1546 if (sdeb_zbc_model == BLK_ZONED_HM && devip->max_open)
1547 put_unaligned_be32(devip->max_open, &arr[12]);
1548 else
1549 put_unaligned_be32(0xffffffff, &arr[12]);
1550 return 0x3c;
1551}
1552
1553#define SDEBUG_LONG_INQ_SZ 96
1554#define SDEBUG_MAX_INQ_ARR_SZ 584
1555
1556static int resp_inquiry(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
1557{
1558 unsigned char pq_pdt;
1559 unsigned char *arr;
1560 unsigned char *cmd = scp->cmnd;
1561 int alloc_len, n, ret;
1562 bool have_wlun, is_disk, is_zbc, is_disk_zbc;
1563
1564 alloc_len = get_unaligned_be16(cmd + 3);
1565 arr = kzalloc(SDEBUG_MAX_INQ_ARR_SZ, GFP_ATOMIC);
1566 if (! arr)
1567 return DID_REQUEUE << 16;
1568 is_disk = (sdebug_ptype == TYPE_DISK);
1569 is_zbc = (devip->zmodel != BLK_ZONED_NONE);
1570 is_disk_zbc = (is_disk || is_zbc);
1571 have_wlun = scsi_is_wlun(scp->device->lun);
1572 if (have_wlun)
1573 pq_pdt = TYPE_WLUN; /* present, wlun */
1574 else if (sdebug_no_lun_0 && (devip->lun == SDEBUG_LUN_0_VAL))
1575 pq_pdt = 0x7f; /* not present, PQ=3, PDT=0x1f */
1576 else
1577 pq_pdt = (sdebug_ptype & 0x1f);
1578 arr[0] = pq_pdt;
1579 if (0x2 & cmd[1]) { /* CMDDT bit set */
1580 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 1);
1581 kfree(arr);
1582 return check_condition_result;
1583 } else if (0x1 & cmd[1]) { /* EVPD bit set */
1584 int lu_id_num, port_group_id, target_dev_id, len;
1585 char lu_id_str[6];
1586 int host_no = devip->sdbg_host->shost->host_no;
1587
1588 port_group_id = (((host_no + 1) & 0x7f) << 8) +
1589 (devip->channel & 0x7f);
1590 if (sdebug_vpd_use_hostno == 0)
1591 host_no = 0;
1592 lu_id_num = have_wlun ? -1 : (((host_no + 1) * 2000) +
1593 (devip->target * 1000) + devip->lun);
1594 target_dev_id = ((host_no + 1) * 2000) +
1595 (devip->target * 1000) - 3;
1596 len = scnprintf(lu_id_str, 6, "%d", lu_id_num);
1597 if (0 == cmd[2]) { /* supported vital product data pages */
1598 arr[1] = cmd[2]; /*sanity */
1599 n = 4;
1600 arr[n++] = 0x0; /* this page */
1601 arr[n++] = 0x80; /* unit serial number */
1602 arr[n++] = 0x83; /* device identification */
1603 arr[n++] = 0x84; /* software interface ident. */
1604 arr[n++] = 0x85; /* management network addresses */
1605 arr[n++] = 0x86; /* extended inquiry */
1606 arr[n++] = 0x87; /* mode page policy */
1607 arr[n++] = 0x88; /* SCSI ports */
1608 if (is_disk_zbc) { /* SBC or ZBC */
1609 arr[n++] = 0x89; /* ATA information */
1610 arr[n++] = 0xb0; /* Block limits */
1611 arr[n++] = 0xb1; /* Block characteristics */
1612 if (is_disk)
1613 arr[n++] = 0xb2; /* LB Provisioning */
1614 if (is_zbc)
1615 arr[n++] = 0xb6; /* ZB dev. char. */
1616 }
1617 arr[3] = n - 4; /* number of supported VPD pages */
1618 } else if (0x80 == cmd[2]) { /* unit serial number */
1619 arr[1] = cmd[2]; /*sanity */
1620 arr[3] = len;
1621 memcpy(&arr[4], lu_id_str, len);
1622 } else if (0x83 == cmd[2]) { /* device identification */
1623 arr[1] = cmd[2]; /*sanity */
1624 arr[3] = inquiry_vpd_83(&arr[4], port_group_id,
1625 target_dev_id, lu_id_num,
1626 lu_id_str, len,
1627 &devip->lu_name);
1628 } else if (0x84 == cmd[2]) { /* Software interface ident. */
1629 arr[1] = cmd[2]; /*sanity */
1630 arr[3] = inquiry_vpd_84(&arr[4]);
1631 } else if (0x85 == cmd[2]) { /* Management network addresses */
1632 arr[1] = cmd[2]; /*sanity */
1633 arr[3] = inquiry_vpd_85(&arr[4]);
1634 } else if (0x86 == cmd[2]) { /* extended inquiry */
1635 arr[1] = cmd[2]; /*sanity */
1636 arr[3] = 0x3c; /* number of following entries */
1637 if (sdebug_dif == T10_PI_TYPE3_PROTECTION)
1638 arr[4] = 0x4; /* SPT: GRD_CHK:1 */
1639 else if (have_dif_prot)
1640 arr[4] = 0x5; /* SPT: GRD_CHK:1, REF_CHK:1 */
1641 else
1642 arr[4] = 0x0; /* no protection stuff */
1643 arr[5] = 0x7; /* head of q, ordered + simple q's */
1644 } else if (0x87 == cmd[2]) { /* mode page policy */
1645 arr[1] = cmd[2]; /*sanity */
1646 arr[3] = 0x8; /* number of following entries */
1647 arr[4] = 0x2; /* disconnect-reconnect mp */
1648 arr[6] = 0x80; /* mlus, shared */
1649 arr[8] = 0x18; /* protocol specific lu */
1650 arr[10] = 0x82; /* mlus, per initiator port */
1651 } else if (0x88 == cmd[2]) { /* SCSI Ports */
1652 arr[1] = cmd[2]; /*sanity */
1653 arr[3] = inquiry_vpd_88(&arr[4], target_dev_id);
1654 } else if (is_disk_zbc && 0x89 == cmd[2]) { /* ATA info */
1655 arr[1] = cmd[2]; /*sanity */
1656 n = inquiry_vpd_89(&arr[4]);
1657 put_unaligned_be16(n, arr + 2);
1658 } else if (is_disk_zbc && 0xb0 == cmd[2]) { /* Block limits */
1659 arr[1] = cmd[2]; /*sanity */
1660 arr[3] = inquiry_vpd_b0(&arr[4]);
1661 } else if (is_disk_zbc && 0xb1 == cmd[2]) { /* Block char. */
1662 arr[1] = cmd[2]; /*sanity */
1663 arr[3] = inquiry_vpd_b1(devip, &arr[4]);
1664 } else if (is_disk && 0xb2 == cmd[2]) { /* LB Prov. */
1665 arr[1] = cmd[2]; /*sanity */
1666 arr[3] = inquiry_vpd_b2(&arr[4]);
1667 } else if (is_zbc && cmd[2] == 0xb6) { /* ZB dev. charact. */
1668 arr[1] = cmd[2]; /*sanity */
1669 arr[3] = inquiry_vpd_b6(devip, &arr[4]);
1670 } else {
1671 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, -1);
1672 kfree(arr);
1673 return check_condition_result;
1674 }
1675 len = min(get_unaligned_be16(arr + 2) + 4, alloc_len);
1676 ret = fill_from_dev_buffer(scp, arr,
1677 min(len, SDEBUG_MAX_INQ_ARR_SZ));
1678 kfree(arr);
1679 return ret;
1680 }
1681 /* drops through here for a standard inquiry */
1682 arr[1] = sdebug_removable ? 0x80 : 0; /* Removable disk */
1683 arr[2] = sdebug_scsi_level;
1684 arr[3] = 2; /* response_data_format==2 */
1685 arr[4] = SDEBUG_LONG_INQ_SZ - 5;
1686 arr[5] = (int)have_dif_prot; /* PROTECT bit */
1687 if (sdebug_vpd_use_hostno == 0)
1688 arr[5] |= 0x10; /* claim: implicit TPGS */
1689 arr[6] = 0x10; /* claim: MultiP */
1690 /* arr[6] |= 0x40; ... claim: EncServ (enclosure services) */
1691 arr[7] = 0xa; /* claim: LINKED + CMDQUE */
1692 memcpy(&arr[8], sdebug_inq_vendor_id, 8);
1693 memcpy(&arr[16], sdebug_inq_product_id, 16);
1694 memcpy(&arr[32], sdebug_inq_product_rev, 4);
1695 /* Use Vendor Specific area to place driver date in ASCII hex */
1696 memcpy(&arr[36], sdebug_version_date, 8);
1697 /* version descriptors (2 bytes each) follow */
1698 put_unaligned_be16(0xc0, arr + 58); /* SAM-6 no version claimed */
1699 put_unaligned_be16(0x5c0, arr + 60); /* SPC-5 no version claimed */
1700 n = 62;
1701 if (is_disk) { /* SBC-4 no version claimed */
1702 put_unaligned_be16(0x600, arr + n);
1703 n += 2;
1704 } else if (sdebug_ptype == TYPE_TAPE) { /* SSC-4 rev 3 */
1705 put_unaligned_be16(0x525, arr + n);
1706 n += 2;
1707 } else if (is_zbc) { /* ZBC BSR INCITS 536 revision 05 */
1708 put_unaligned_be16(0x624, arr + n);
1709 n += 2;
1710 }
1711 put_unaligned_be16(0x2100, arr + n); /* SPL-4 no version claimed */
1712 ret = fill_from_dev_buffer(scp, arr,
1713 min_t(int, alloc_len, SDEBUG_LONG_INQ_SZ));
1714 kfree(arr);
1715 return ret;
1716}
1717
1718/* See resp_iec_m_pg() for how this data is manipulated */
1719static unsigned char iec_m_pg[] = {0x1c, 0xa, 0x08, 0, 0, 0, 0, 0,
1720 0, 0, 0x0, 0x0};
1721
1722static int resp_requests(struct scsi_cmnd *scp,
1723 struct sdebug_dev_info *devip)
1724{
1725 unsigned char *cmd = scp->cmnd;
1726 unsigned char arr[SCSI_SENSE_BUFFERSIZE]; /* assume >= 18 bytes */
1727 bool dsense = !!(cmd[1] & 1);
1728 int alloc_len = cmd[4];
1729 int len = 18;
1730 int stopped_state = atomic_read(&devip->stopped);
1731
1732 memset(arr, 0, sizeof(arr));
1733 if (stopped_state > 0) { /* some "pollable" data [spc6r02: 5.12.2] */
1734 if (dsense) {
1735 arr[0] = 0x72;
1736 arr[1] = NOT_READY;
1737 arr[2] = LOGICAL_UNIT_NOT_READY;
1738 arr[3] = (stopped_state == 2) ? 0x1 : 0x2;
1739 len = 8;
1740 } else {
1741 arr[0] = 0x70;
1742 arr[2] = NOT_READY; /* NO_SENSE in sense_key */
1743 arr[7] = 0xa; /* 18 byte sense buffer */
1744 arr[12] = LOGICAL_UNIT_NOT_READY;
1745 arr[13] = (stopped_state == 2) ? 0x1 : 0x2;
1746 }
1747 } else if ((iec_m_pg[2] & 0x4) && (6 == (iec_m_pg[3] & 0xf))) {
1748 /* Information exceptions control mode page: TEST=1, MRIE=6 */
1749 if (dsense) {
1750 arr[0] = 0x72;
1751 arr[1] = 0x0; /* NO_SENSE in sense_key */
1752 arr[2] = THRESHOLD_EXCEEDED;
1753 arr[3] = 0xff; /* Failure prediction(false) */
1754 len = 8;
1755 } else {
1756 arr[0] = 0x70;
1757 arr[2] = 0x0; /* NO_SENSE in sense_key */
1758 arr[7] = 0xa; /* 18 byte sense buffer */
1759 arr[12] = THRESHOLD_EXCEEDED;
1760 arr[13] = 0xff; /* Failure prediction(false) */
1761 }
1762 } else { /* nothing to report */
1763 if (dsense) {
1764 len = 8;
1765 memset(arr, 0, len);
1766 arr[0] = 0x72;
1767 } else {
1768 memset(arr, 0, len);
1769 arr[0] = 0x70;
1770 arr[7] = 0xa;
1771 }
1772 }
1773 return fill_from_dev_buffer(scp, arr, min_t(int, len, alloc_len));
1774}
1775
1776static int resp_start_stop(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
1777{
1778 unsigned char *cmd = scp->cmnd;
1779 int power_cond, want_stop, stopped_state;
1780 bool changing;
1781
1782 power_cond = (cmd[4] & 0xf0) >> 4;
1783 if (power_cond) {
1784 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 4, 7);
1785 return check_condition_result;
1786 }
1787 want_stop = !(cmd[4] & 1);
1788 stopped_state = atomic_read(&devip->stopped);
1789 if (stopped_state == 2) {
1790 ktime_t now_ts = ktime_get_boottime();
1791
1792 if (ktime_to_ns(now_ts) > ktime_to_ns(devip->create_ts)) {
1793 u64 diff_ns = ktime_to_ns(ktime_sub(now_ts, devip->create_ts));
1794
1795 if (diff_ns >= ((u64)sdeb_tur_ms_to_ready * 1000000)) {
1796 /* tur_ms_to_ready timer extinguished */
1797 atomic_set(&devip->stopped, 0);
1798 stopped_state = 0;
1799 }
1800 }
1801 if (stopped_state == 2) {
1802 if (want_stop) {
1803 stopped_state = 1; /* dummy up success */
1804 } else { /* Disallow tur_ms_to_ready delay to be overridden */
1805 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 4, 0 /* START bit */);
1806 return check_condition_result;
1807 }
1808 }
1809 }
1810 changing = (stopped_state != want_stop);
1811 if (changing)
1812 atomic_xchg(&devip->stopped, want_stop);
1813 if (!changing || (cmd[1] & 0x1)) /* state unchanged or IMMED bit set in cdb */
1814 return SDEG_RES_IMMED_MASK;
1815 else
1816 return 0;
1817}
1818
1819static sector_t get_sdebug_capacity(void)
1820{
1821 static const unsigned int gibibyte = 1073741824;
1822
1823 if (sdebug_virtual_gb > 0)
1824 return (sector_t)sdebug_virtual_gb *
1825 (gibibyte / sdebug_sector_size);
1826 else
1827 return sdebug_store_sectors;
1828}
1829
1830#define SDEBUG_READCAP_ARR_SZ 8
1831static int resp_readcap(struct scsi_cmnd *scp,
1832 struct sdebug_dev_info *devip)
1833{
1834 unsigned char arr[SDEBUG_READCAP_ARR_SZ];
1835 unsigned int capac;
1836
1837 /* following just in case virtual_gb changed */
1838 sdebug_capacity = get_sdebug_capacity();
1839 memset(arr, 0, SDEBUG_READCAP_ARR_SZ);
1840 if (sdebug_capacity < 0xffffffff) {
1841 capac = (unsigned int)sdebug_capacity - 1;
1842 put_unaligned_be32(capac, arr + 0);
1843 } else
1844 put_unaligned_be32(0xffffffff, arr + 0);
1845 put_unaligned_be16(sdebug_sector_size, arr + 6);
1846 return fill_from_dev_buffer(scp, arr, SDEBUG_READCAP_ARR_SZ);
1847}
1848
1849#define SDEBUG_READCAP16_ARR_SZ 32
1850static int resp_readcap16(struct scsi_cmnd *scp,
1851 struct sdebug_dev_info *devip)
1852{
1853 unsigned char *cmd = scp->cmnd;
1854 unsigned char arr[SDEBUG_READCAP16_ARR_SZ];
1855 int alloc_len;
1856
1857 alloc_len = get_unaligned_be32(cmd + 10);
1858 /* following just in case virtual_gb changed */
1859 sdebug_capacity = get_sdebug_capacity();
1860 memset(arr, 0, SDEBUG_READCAP16_ARR_SZ);
1861 put_unaligned_be64((u64)(sdebug_capacity - 1), arr + 0);
1862 put_unaligned_be32(sdebug_sector_size, arr + 8);
1863 arr[13] = sdebug_physblk_exp & 0xf;
1864 arr[14] = (sdebug_lowest_aligned >> 8) & 0x3f;
1865
1866 if (scsi_debug_lbp()) {
1867 arr[14] |= 0x80; /* LBPME */
1868 /* from sbc4r07, this LBPRZ field is 1 bit, but the LBPRZ in
1869 * the LB Provisioning VPD page is 3 bits. Note that lbprz=2
1870 * in the wider field maps to 0 in this field.
1871 */
1872 if (sdebug_lbprz & 1) /* precisely what the draft requires */
1873 arr[14] |= 0x40;
1874 }
1875
1876 arr[15] = sdebug_lowest_aligned & 0xff;
1877
1878 if (have_dif_prot) {
1879 arr[12] = (sdebug_dif - 1) << 1; /* P_TYPE */
1880 arr[12] |= 1; /* PROT_EN */
1881 }
1882
1883 return fill_from_dev_buffer(scp, arr,
1884 min_t(int, alloc_len, SDEBUG_READCAP16_ARR_SZ));
1885}
1886
1887#define SDEBUG_MAX_TGTPGS_ARR_SZ 1412
1888
1889static int resp_report_tgtpgs(struct scsi_cmnd *scp,
1890 struct sdebug_dev_info *devip)
1891{
1892 unsigned char *cmd = scp->cmnd;
1893 unsigned char *arr;
1894 int host_no = devip->sdbg_host->shost->host_no;
1895 int n, ret, alen, rlen;
1896 int port_group_a, port_group_b, port_a, port_b;
1897
1898 alen = get_unaligned_be32(cmd + 6);
1899 arr = kzalloc(SDEBUG_MAX_TGTPGS_ARR_SZ, GFP_ATOMIC);
1900 if (! arr)
1901 return DID_REQUEUE << 16;
1902 /*
1903 * EVPD page 0x88 states we have two ports, one
1904 * real and a fake port with no device connected.
1905 * So we create two port groups with one port each
1906 * and set the group with port B to unavailable.
1907 */
1908 port_a = 0x1; /* relative port A */
1909 port_b = 0x2; /* relative port B */
1910 port_group_a = (((host_no + 1) & 0x7f) << 8) +
1911 (devip->channel & 0x7f);
1912 port_group_b = (((host_no + 1) & 0x7f) << 8) +
1913 (devip->channel & 0x7f) + 0x80;
1914
1915 /*
1916 * The asymmetric access state is cycled according to the host_id.
1917 */
1918 n = 4;
1919 if (sdebug_vpd_use_hostno == 0) {
1920 arr[n++] = host_no % 3; /* Asymm access state */
1921 arr[n++] = 0x0F; /* claim: all states are supported */
1922 } else {
1923 arr[n++] = 0x0; /* Active/Optimized path */
1924 arr[n++] = 0x01; /* only support active/optimized paths */
1925 }
1926 put_unaligned_be16(port_group_a, arr + n);
1927 n += 2;
1928 arr[n++] = 0; /* Reserved */
1929 arr[n++] = 0; /* Status code */
1930 arr[n++] = 0; /* Vendor unique */
1931 arr[n++] = 0x1; /* One port per group */
1932 arr[n++] = 0; /* Reserved */
1933 arr[n++] = 0; /* Reserved */
1934 put_unaligned_be16(port_a, arr + n);
1935 n += 2;
1936 arr[n++] = 3; /* Port unavailable */
1937 arr[n++] = 0x08; /* claim: only unavailalbe paths are supported */
1938 put_unaligned_be16(port_group_b, arr + n);
1939 n += 2;
1940 arr[n++] = 0; /* Reserved */
1941 arr[n++] = 0; /* Status code */
1942 arr[n++] = 0; /* Vendor unique */
1943 arr[n++] = 0x1; /* One port per group */
1944 arr[n++] = 0; /* Reserved */
1945 arr[n++] = 0; /* Reserved */
1946 put_unaligned_be16(port_b, arr + n);
1947 n += 2;
1948
1949 rlen = n - 4;
1950 put_unaligned_be32(rlen, arr + 0);
1951
1952 /*
1953 * Return the smallest value of either
1954 * - The allocated length
1955 * - The constructed command length
1956 * - The maximum array size
1957 */
1958 rlen = min_t(int, alen, n);
1959 ret = fill_from_dev_buffer(scp, arr,
1960 min_t(int, rlen, SDEBUG_MAX_TGTPGS_ARR_SZ));
1961 kfree(arr);
1962 return ret;
1963}
1964
1965static int resp_rsup_opcodes(struct scsi_cmnd *scp,
1966 struct sdebug_dev_info *devip)
1967{
1968 bool rctd;
1969 u8 reporting_opts, req_opcode, sdeb_i, supp;
1970 u16 req_sa, u;
1971 u32 alloc_len, a_len;
1972 int k, offset, len, errsts, count, bump, na;
1973 const struct opcode_info_t *oip;
1974 const struct opcode_info_t *r_oip;
1975 u8 *arr;
1976 u8 *cmd = scp->cmnd;
1977
1978 rctd = !!(cmd[2] & 0x80);
1979 reporting_opts = cmd[2] & 0x7;
1980 req_opcode = cmd[3];
1981 req_sa = get_unaligned_be16(cmd + 4);
1982 alloc_len = get_unaligned_be32(cmd + 6);
1983 if (alloc_len < 4 || alloc_len > 0xffff) {
1984 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 6, -1);
1985 return check_condition_result;
1986 }
1987 if (alloc_len > 8192)
1988 a_len = 8192;
1989 else
1990 a_len = alloc_len;
1991 arr = kzalloc((a_len < 256) ? 320 : a_len + 64, GFP_ATOMIC);
1992 if (NULL == arr) {
1993 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
1994 INSUFF_RES_ASCQ);
1995 return check_condition_result;
1996 }
1997 switch (reporting_opts) {
1998 case 0: /* all commands */
1999 /* count number of commands */
2000 for (count = 0, oip = opcode_info_arr;
2001 oip->num_attached != 0xff; ++oip) {
2002 if (F_INV_OP & oip->flags)
2003 continue;
2004 count += (oip->num_attached + 1);
2005 }
2006 bump = rctd ? 20 : 8;
2007 put_unaligned_be32(count * bump, arr);
2008 for (offset = 4, oip = opcode_info_arr;
2009 oip->num_attached != 0xff && offset < a_len; ++oip) {
2010 if (F_INV_OP & oip->flags)
2011 continue;
2012 na = oip->num_attached;
2013 arr[offset] = oip->opcode;
2014 put_unaligned_be16(oip->sa, arr + offset + 2);
2015 if (rctd)
2016 arr[offset + 5] |= 0x2;
2017 if (FF_SA & oip->flags)
2018 arr[offset + 5] |= 0x1;
2019 put_unaligned_be16(oip->len_mask[0], arr + offset + 6);
2020 if (rctd)
2021 put_unaligned_be16(0xa, arr + offset + 8);
2022 r_oip = oip;
2023 for (k = 0, oip = oip->arrp; k < na; ++k, ++oip) {
2024 if (F_INV_OP & oip->flags)
2025 continue;
2026 offset += bump;
2027 arr[offset] = oip->opcode;
2028 put_unaligned_be16(oip->sa, arr + offset + 2);
2029 if (rctd)
2030 arr[offset + 5] |= 0x2;
2031 if (FF_SA & oip->flags)
2032 arr[offset + 5] |= 0x1;
2033 put_unaligned_be16(oip->len_mask[0],
2034 arr + offset + 6);
2035 if (rctd)
2036 put_unaligned_be16(0xa,
2037 arr + offset + 8);
2038 }
2039 oip = r_oip;
2040 offset += bump;
2041 }
2042 break;
2043 case 1: /* one command: opcode only */
2044 case 2: /* one command: opcode plus service action */
2045 case 3: /* one command: if sa==0 then opcode only else opcode+sa */
2046 sdeb_i = opcode_ind_arr[req_opcode];
2047 oip = &opcode_info_arr[sdeb_i];
2048 if (F_INV_OP & oip->flags) {
2049 supp = 1;
2050 offset = 4;
2051 } else {
2052 if (1 == reporting_opts) {
2053 if (FF_SA & oip->flags) {
2054 mk_sense_invalid_fld(scp, SDEB_IN_CDB,
2055 2, 2);
2056 kfree(arr);
2057 return check_condition_result;
2058 }
2059 req_sa = 0;
2060 } else if (2 == reporting_opts &&
2061 0 == (FF_SA & oip->flags)) {
2062 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 4, -1);
2063 kfree(arr); /* point at requested sa */
2064 return check_condition_result;
2065 }
2066 if (0 == (FF_SA & oip->flags) &&
2067 req_opcode == oip->opcode)
2068 supp = 3;
2069 else if (0 == (FF_SA & oip->flags)) {
2070 na = oip->num_attached;
2071 for (k = 0, oip = oip->arrp; k < na;
2072 ++k, ++oip) {
2073 if (req_opcode == oip->opcode)
2074 break;
2075 }
2076 supp = (k >= na) ? 1 : 3;
2077 } else if (req_sa != oip->sa) {
2078 na = oip->num_attached;
2079 for (k = 0, oip = oip->arrp; k < na;
2080 ++k, ++oip) {
2081 if (req_sa == oip->sa)
2082 break;
2083 }
2084 supp = (k >= na) ? 1 : 3;
2085 } else
2086 supp = 3;
2087 if (3 == supp) {
2088 u = oip->len_mask[0];
2089 put_unaligned_be16(u, arr + 2);
2090 arr[4] = oip->opcode;
2091 for (k = 1; k < u; ++k)
2092 arr[4 + k] = (k < 16) ?
2093 oip->len_mask[k] : 0xff;
2094 offset = 4 + u;
2095 } else
2096 offset = 4;
2097 }
2098 arr[1] = (rctd ? 0x80 : 0) | supp;
2099 if (rctd) {
2100 put_unaligned_be16(0xa, arr + offset);
2101 offset += 12;
2102 }
2103 break;
2104 default:
2105 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 2);
2106 kfree(arr);
2107 return check_condition_result;
2108 }
2109 offset = (offset < a_len) ? offset : a_len;
2110 len = (offset < alloc_len) ? offset : alloc_len;
2111 errsts = fill_from_dev_buffer(scp, arr, len);
2112 kfree(arr);
2113 return errsts;
2114}
2115
2116static int resp_rsup_tmfs(struct scsi_cmnd *scp,
2117 struct sdebug_dev_info *devip)
2118{
2119 bool repd;
2120 u32 alloc_len, len;
2121 u8 arr[16];
2122 u8 *cmd = scp->cmnd;
2123
2124 memset(arr, 0, sizeof(arr));
2125 repd = !!(cmd[2] & 0x80);
2126 alloc_len = get_unaligned_be32(cmd + 6);
2127 if (alloc_len < 4) {
2128 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 6, -1);
2129 return check_condition_result;
2130 }
2131 arr[0] = 0xc8; /* ATS | ATSS | LURS */
2132 arr[1] = 0x1; /* ITNRS */
2133 if (repd) {
2134 arr[3] = 0xc;
2135 len = 16;
2136 } else
2137 len = 4;
2138
2139 len = (len < alloc_len) ? len : alloc_len;
2140 return fill_from_dev_buffer(scp, arr, len);
2141}
2142
2143/* <<Following mode page info copied from ST318451LW>> */
2144
2145static int resp_err_recov_pg(unsigned char *p, int pcontrol, int target)
2146{ /* Read-Write Error Recovery page for mode_sense */
2147 unsigned char err_recov_pg[] = {0x1, 0xa, 0xc0, 11, 240, 0, 0, 0,
2148 5, 0, 0xff, 0xff};
2149
2150 memcpy(p, err_recov_pg, sizeof(err_recov_pg));
2151 if (1 == pcontrol)
2152 memset(p + 2, 0, sizeof(err_recov_pg) - 2);
2153 return sizeof(err_recov_pg);
2154}
2155
2156static int resp_disconnect_pg(unsigned char *p, int pcontrol, int target)
2157{ /* Disconnect-Reconnect page for mode_sense */
2158 unsigned char disconnect_pg[] = {0x2, 0xe, 128, 128, 0, 10, 0, 0,
2159 0, 0, 0, 0, 0, 0, 0, 0};
2160
2161 memcpy(p, disconnect_pg, sizeof(disconnect_pg));
2162 if (1 == pcontrol)
2163 memset(p + 2, 0, sizeof(disconnect_pg) - 2);
2164 return sizeof(disconnect_pg);
2165}
2166
2167static int resp_format_pg(unsigned char *p, int pcontrol, int target)
2168{ /* Format device page for mode_sense */
2169 unsigned char format_pg[] = {0x3, 0x16, 0, 0, 0, 0, 0, 0,
2170 0, 0, 0, 0, 0, 0, 0, 0,
2171 0, 0, 0, 0, 0x40, 0, 0, 0};
2172
2173 memcpy(p, format_pg, sizeof(format_pg));
2174 put_unaligned_be16(sdebug_sectors_per, p + 10);
2175 put_unaligned_be16(sdebug_sector_size, p + 12);
2176 if (sdebug_removable)
2177 p[20] |= 0x20; /* should agree with INQUIRY */
2178 if (1 == pcontrol)
2179 memset(p + 2, 0, sizeof(format_pg) - 2);
2180 return sizeof(format_pg);
2181}
2182
2183static unsigned char caching_pg[] = {0x8, 18, 0x14, 0, 0xff, 0xff, 0, 0,
2184 0xff, 0xff, 0xff, 0xff, 0x80, 0x14, 0, 0,
2185 0, 0, 0, 0};
2186
2187static int resp_caching_pg(unsigned char *p, int pcontrol, int target)
2188{ /* Caching page for mode_sense */
2189 unsigned char ch_caching_pg[] = {/* 0x8, 18, */ 0x4, 0, 0, 0, 0, 0,
2190 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
2191 unsigned char d_caching_pg[] = {0x8, 18, 0x14, 0, 0xff, 0xff, 0, 0,
2192 0xff, 0xff, 0xff, 0xff, 0x80, 0x14, 0, 0, 0, 0, 0, 0};
2193
2194 if (SDEBUG_OPT_N_WCE & sdebug_opts)
2195 caching_pg[2] &= ~0x4; /* set WCE=0 (default WCE=1) */
2196 memcpy(p, caching_pg, sizeof(caching_pg));
2197 if (1 == pcontrol)
2198 memcpy(p + 2, ch_caching_pg, sizeof(ch_caching_pg));
2199 else if (2 == pcontrol)
2200 memcpy(p, d_caching_pg, sizeof(d_caching_pg));
2201 return sizeof(caching_pg);
2202}
2203
2204static unsigned char ctrl_m_pg[] = {0xa, 10, 2, 0, 0, 0, 0, 0,
2205 0, 0, 0x2, 0x4b};
2206
2207static int resp_ctrl_m_pg(unsigned char *p, int pcontrol, int target)
2208{ /* Control mode page for mode_sense */
2209 unsigned char ch_ctrl_m_pg[] = {/* 0xa, 10, */ 0x6, 0, 0, 0, 0, 0,
2210 0, 0, 0, 0};
2211 unsigned char d_ctrl_m_pg[] = {0xa, 10, 2, 0, 0, 0, 0, 0,
2212 0, 0, 0x2, 0x4b};
2213
2214 if (sdebug_dsense)
2215 ctrl_m_pg[2] |= 0x4;
2216 else
2217 ctrl_m_pg[2] &= ~0x4;
2218
2219 if (sdebug_ato)
2220 ctrl_m_pg[5] |= 0x80; /* ATO=1 */
2221
2222 memcpy(p, ctrl_m_pg, sizeof(ctrl_m_pg));
2223 if (1 == pcontrol)
2224 memcpy(p + 2, ch_ctrl_m_pg, sizeof(ch_ctrl_m_pg));
2225 else if (2 == pcontrol)
2226 memcpy(p, d_ctrl_m_pg, sizeof(d_ctrl_m_pg));
2227 return sizeof(ctrl_m_pg);
2228}
2229
2230
2231static int resp_iec_m_pg(unsigned char *p, int pcontrol, int target)
2232{ /* Informational Exceptions control mode page for mode_sense */
2233 unsigned char ch_iec_m_pg[] = {/* 0x1c, 0xa, */ 0x4, 0xf, 0, 0, 0, 0,
2234 0, 0, 0x0, 0x0};
2235 unsigned char d_iec_m_pg[] = {0x1c, 0xa, 0x08, 0, 0, 0, 0, 0,
2236 0, 0, 0x0, 0x0};
2237
2238 memcpy(p, iec_m_pg, sizeof(iec_m_pg));
2239 if (1 == pcontrol)
2240 memcpy(p + 2, ch_iec_m_pg, sizeof(ch_iec_m_pg));
2241 else if (2 == pcontrol)
2242 memcpy(p, d_iec_m_pg, sizeof(d_iec_m_pg));
2243 return sizeof(iec_m_pg);
2244}
2245
2246static int resp_sas_sf_m_pg(unsigned char *p, int pcontrol, int target)
2247{ /* SAS SSP mode page - short format for mode_sense */
2248 unsigned char sas_sf_m_pg[] = {0x19, 0x6,
2249 0x6, 0x0, 0x7, 0xd0, 0x0, 0x0};
2250
2251 memcpy(p, sas_sf_m_pg, sizeof(sas_sf_m_pg));
2252 if (1 == pcontrol)
2253 memset(p + 2, 0, sizeof(sas_sf_m_pg) - 2);
2254 return sizeof(sas_sf_m_pg);
2255}
2256
2257
2258static int resp_sas_pcd_m_spg(unsigned char *p, int pcontrol, int target,
2259 int target_dev_id)
2260{ /* SAS phy control and discover mode page for mode_sense */
2261 unsigned char sas_pcd_m_pg[] = {0x59, 0x1, 0, 0x64, 0, 0x6, 0, 2,
2262 0, 0, 0, 0, 0x10, 0x9, 0x8, 0x0,
2263 0, 0, 0, 0, 0, 0, 0, 0, /* insert SAS addr */
2264 0, 0, 0, 0, 0, 0, 0, 0, /* insert SAS addr */
2265 0x2, 0, 0, 0, 0, 0, 0, 0,
2266 0x88, 0x99, 0, 0, 0, 0, 0, 0,
2267 0, 0, 0, 0, 0, 0, 0, 0,
2268 0, 1, 0, 0, 0x10, 0x9, 0x8, 0x0,
2269 0, 0, 0, 0, 0, 0, 0, 0, /* insert SAS addr */
2270 0, 0, 0, 0, 0, 0, 0, 0, /* insert SAS addr */
2271 0x3, 0, 0, 0, 0, 0, 0, 0,
2272 0x88, 0x99, 0, 0, 0, 0, 0, 0,
2273 0, 0, 0, 0, 0, 0, 0, 0,
2274 };
2275 int port_a, port_b;
2276
2277 put_unaligned_be64(naa3_comp_a, sas_pcd_m_pg + 16);
2278 put_unaligned_be64(naa3_comp_c + 1, sas_pcd_m_pg + 24);
2279 put_unaligned_be64(naa3_comp_a, sas_pcd_m_pg + 64);
2280 put_unaligned_be64(naa3_comp_c + 1, sas_pcd_m_pg + 72);
2281 port_a = target_dev_id + 1;
2282 port_b = port_a + 1;
2283 memcpy(p, sas_pcd_m_pg, sizeof(sas_pcd_m_pg));
2284 put_unaligned_be32(port_a, p + 20);
2285 put_unaligned_be32(port_b, p + 48 + 20);
2286 if (1 == pcontrol)
2287 memset(p + 4, 0, sizeof(sas_pcd_m_pg) - 4);
2288 return sizeof(sas_pcd_m_pg);
2289}
2290
2291static int resp_sas_sha_m_spg(unsigned char *p, int pcontrol)
2292{ /* SAS SSP shared protocol specific port mode subpage */
2293 unsigned char sas_sha_m_pg[] = {0x59, 0x2, 0, 0xc, 0, 0x6, 0x10, 0,
2294 0, 0, 0, 0, 0, 0, 0, 0,
2295 };
2296
2297 memcpy(p, sas_sha_m_pg, sizeof(sas_sha_m_pg));
2298 if (1 == pcontrol)
2299 memset(p + 4, 0, sizeof(sas_sha_m_pg) - 4);
2300 return sizeof(sas_sha_m_pg);
2301}
2302
2303#define SDEBUG_MAX_MSENSE_SZ 256
2304
2305static int resp_mode_sense(struct scsi_cmnd *scp,
2306 struct sdebug_dev_info *devip)
2307{
2308 int pcontrol, pcode, subpcode, bd_len;
2309 unsigned char dev_spec;
2310 int alloc_len, offset, len, target_dev_id;
2311 int target = scp->device->id;
2312 unsigned char *ap;
2313 unsigned char arr[SDEBUG_MAX_MSENSE_SZ];
2314 unsigned char *cmd = scp->cmnd;
2315 bool dbd, llbaa, msense_6, is_disk, is_zbc, bad_pcode;
2316
2317 dbd = !!(cmd[1] & 0x8); /* disable block descriptors */
2318 pcontrol = (cmd[2] & 0xc0) >> 6;
2319 pcode = cmd[2] & 0x3f;
2320 subpcode = cmd[3];
2321 msense_6 = (MODE_SENSE == cmd[0]);
2322 llbaa = msense_6 ? false : !!(cmd[1] & 0x10);
2323 is_disk = (sdebug_ptype == TYPE_DISK);
2324 is_zbc = (devip->zmodel != BLK_ZONED_NONE);
2325 if ((is_disk || is_zbc) && !dbd)
2326 bd_len = llbaa ? 16 : 8;
2327 else
2328 bd_len = 0;
2329 alloc_len = msense_6 ? cmd[4] : get_unaligned_be16(cmd + 7);
2330 memset(arr, 0, SDEBUG_MAX_MSENSE_SZ);
2331 if (0x3 == pcontrol) { /* Saving values not supported */
2332 mk_sense_buffer(scp, ILLEGAL_REQUEST, SAVING_PARAMS_UNSUP, 0);
2333 return check_condition_result;
2334 }
2335 target_dev_id = ((devip->sdbg_host->shost->host_no + 1) * 2000) +
2336 (devip->target * 1000) - 3;
2337 /* for disks+zbc set DPOFUA bit and clear write protect (WP) bit */
2338 if (is_disk || is_zbc) {
2339 dev_spec = 0x10; /* =0x90 if WP=1 implies read-only */
2340 if (sdebug_wp)
2341 dev_spec |= 0x80;
2342 } else
2343 dev_spec = 0x0;
2344 if (msense_6) {
2345 arr[2] = dev_spec;
2346 arr[3] = bd_len;
2347 offset = 4;
2348 } else {
2349 arr[3] = dev_spec;
2350 if (16 == bd_len)
2351 arr[4] = 0x1; /* set LONGLBA bit */
2352 arr[7] = bd_len; /* assume 255 or less */
2353 offset = 8;
2354 }
2355 ap = arr + offset;
2356 if ((bd_len > 0) && (!sdebug_capacity))
2357 sdebug_capacity = get_sdebug_capacity();
2358
2359 if (8 == bd_len) {
2360 if (sdebug_capacity > 0xfffffffe)
2361 put_unaligned_be32(0xffffffff, ap + 0);
2362 else
2363 put_unaligned_be32(sdebug_capacity, ap + 0);
2364 put_unaligned_be16(sdebug_sector_size, ap + 6);
2365 offset += bd_len;
2366 ap = arr + offset;
2367 } else if (16 == bd_len) {
2368 put_unaligned_be64((u64)sdebug_capacity, ap + 0);
2369 put_unaligned_be32(sdebug_sector_size, ap + 12);
2370 offset += bd_len;
2371 ap = arr + offset;
2372 }
2373
2374 if ((subpcode > 0x0) && (subpcode < 0xff) && (0x19 != pcode)) {
2375 /* TODO: Control Extension page */
2376 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1);
2377 return check_condition_result;
2378 }
2379 bad_pcode = false;
2380
2381 switch (pcode) {
2382 case 0x1: /* Read-Write error recovery page, direct access */
2383 len = resp_err_recov_pg(ap, pcontrol, target);
2384 offset += len;
2385 break;
2386 case 0x2: /* Disconnect-Reconnect page, all devices */
2387 len = resp_disconnect_pg(ap, pcontrol, target);
2388 offset += len;
2389 break;
2390 case 0x3: /* Format device page, direct access */
2391 if (is_disk) {
2392 len = resp_format_pg(ap, pcontrol, target);
2393 offset += len;
2394 } else
2395 bad_pcode = true;
2396 break;
2397 case 0x8: /* Caching page, direct access */
2398 if (is_disk || is_zbc) {
2399 len = resp_caching_pg(ap, pcontrol, target);
2400 offset += len;
2401 } else
2402 bad_pcode = true;
2403 break;
2404 case 0xa: /* Control Mode page, all devices */
2405 len = resp_ctrl_m_pg(ap, pcontrol, target);
2406 offset += len;
2407 break;
2408 case 0x19: /* if spc==1 then sas phy, control+discover */
2409 if ((subpcode > 0x2) && (subpcode < 0xff)) {
2410 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1);
2411 return check_condition_result;
2412 }
2413 len = 0;
2414 if ((0x0 == subpcode) || (0xff == subpcode))
2415 len += resp_sas_sf_m_pg(ap + len, pcontrol, target);
2416 if ((0x1 == subpcode) || (0xff == subpcode))
2417 len += resp_sas_pcd_m_spg(ap + len, pcontrol, target,
2418 target_dev_id);
2419 if ((0x2 == subpcode) || (0xff == subpcode))
2420 len += resp_sas_sha_m_spg(ap + len, pcontrol);
2421 offset += len;
2422 break;
2423 case 0x1c: /* Informational Exceptions Mode page, all devices */
2424 len = resp_iec_m_pg(ap, pcontrol, target);
2425 offset += len;
2426 break;
2427 case 0x3f: /* Read all Mode pages */
2428 if ((0 == subpcode) || (0xff == subpcode)) {
2429 len = resp_err_recov_pg(ap, pcontrol, target);
2430 len += resp_disconnect_pg(ap + len, pcontrol, target);
2431 if (is_disk) {
2432 len += resp_format_pg(ap + len, pcontrol,
2433 target);
2434 len += resp_caching_pg(ap + len, pcontrol,
2435 target);
2436 } else if (is_zbc) {
2437 len += resp_caching_pg(ap + len, pcontrol,
2438 target);
2439 }
2440 len += resp_ctrl_m_pg(ap + len, pcontrol, target);
2441 len += resp_sas_sf_m_pg(ap + len, pcontrol, target);
2442 if (0xff == subpcode) {
2443 len += resp_sas_pcd_m_spg(ap + len, pcontrol,
2444 target, target_dev_id);
2445 len += resp_sas_sha_m_spg(ap + len, pcontrol);
2446 }
2447 len += resp_iec_m_pg(ap + len, pcontrol, target);
2448 offset += len;
2449 } else {
2450 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1);
2451 return check_condition_result;
2452 }
2453 break;
2454 default:
2455 bad_pcode = true;
2456 break;
2457 }
2458 if (bad_pcode) {
2459 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 5);
2460 return check_condition_result;
2461 }
2462 if (msense_6)
2463 arr[0] = offset - 1;
2464 else
2465 put_unaligned_be16((offset - 2), arr + 0);
2466 return fill_from_dev_buffer(scp, arr, min_t(int, alloc_len, offset));
2467}
2468
2469#define SDEBUG_MAX_MSELECT_SZ 512
2470
2471static int resp_mode_select(struct scsi_cmnd *scp,
2472 struct sdebug_dev_info *devip)
2473{
2474 int pf, sp, ps, md_len, bd_len, off, spf, pg_len;
2475 int param_len, res, mpage;
2476 unsigned char arr[SDEBUG_MAX_MSELECT_SZ];
2477 unsigned char *cmd = scp->cmnd;
2478 int mselect6 = (MODE_SELECT == cmd[0]);
2479
2480 memset(arr, 0, sizeof(arr));
2481 pf = cmd[1] & 0x10;
2482 sp = cmd[1] & 0x1;
2483 param_len = mselect6 ? cmd[4] : get_unaligned_be16(cmd + 7);
2484 if ((0 == pf) || sp || (param_len > SDEBUG_MAX_MSELECT_SZ)) {
2485 mk_sense_invalid_fld(scp, SDEB_IN_CDB, mselect6 ? 4 : 7, -1);
2486 return check_condition_result;
2487 }
2488 res = fetch_to_dev_buffer(scp, arr, param_len);
2489 if (-1 == res)
2490 return DID_ERROR << 16;
2491 else if (sdebug_verbose && (res < param_len))
2492 sdev_printk(KERN_INFO, scp->device,
2493 "%s: cdb indicated=%d, IO sent=%d bytes\n",
2494 __func__, param_len, res);
2495 md_len = mselect6 ? (arr[0] + 1) : (get_unaligned_be16(arr + 0) + 2);
2496 bd_len = mselect6 ? arr[3] : get_unaligned_be16(arr + 6);
2497 if (md_len > 2) {
2498 mk_sense_invalid_fld(scp, SDEB_IN_DATA, 0, -1);
2499 return check_condition_result;
2500 }
2501 off = bd_len + (mselect6 ? 4 : 8);
2502 mpage = arr[off] & 0x3f;
2503 ps = !!(arr[off] & 0x80);
2504 if (ps) {
2505 mk_sense_invalid_fld(scp, SDEB_IN_DATA, off, 7);
2506 return check_condition_result;
2507 }
2508 spf = !!(arr[off] & 0x40);
2509 pg_len = spf ? (get_unaligned_be16(arr + off + 2) + 4) :
2510 (arr[off + 1] + 2);
2511 if ((pg_len + off) > param_len) {
2512 mk_sense_buffer(scp, ILLEGAL_REQUEST,
2513 PARAMETER_LIST_LENGTH_ERR, 0);
2514 return check_condition_result;
2515 }
2516 switch (mpage) {
2517 case 0x8: /* Caching Mode page */
2518 if (caching_pg[1] == arr[off + 1]) {
2519 memcpy(caching_pg + 2, arr + off + 2,
2520 sizeof(caching_pg) - 2);
2521 goto set_mode_changed_ua;
2522 }
2523 break;
2524 case 0xa: /* Control Mode page */
2525 if (ctrl_m_pg[1] == arr[off + 1]) {
2526 memcpy(ctrl_m_pg + 2, arr + off + 2,
2527 sizeof(ctrl_m_pg) - 2);
2528 if (ctrl_m_pg[4] & 0x8)
2529 sdebug_wp = true;
2530 else
2531 sdebug_wp = false;
2532 sdebug_dsense = !!(ctrl_m_pg[2] & 0x4);
2533 goto set_mode_changed_ua;
2534 }
2535 break;
2536 case 0x1c: /* Informational Exceptions Mode page */
2537 if (iec_m_pg[1] == arr[off + 1]) {
2538 memcpy(iec_m_pg + 2, arr + off + 2,
2539 sizeof(iec_m_pg) - 2);
2540 goto set_mode_changed_ua;
2541 }
2542 break;
2543 default:
2544 break;
2545 }
2546 mk_sense_invalid_fld(scp, SDEB_IN_DATA, off, 5);
2547 return check_condition_result;
2548set_mode_changed_ua:
2549 set_bit(SDEBUG_UA_MODE_CHANGED, devip->uas_bm);
2550 return 0;
2551}
2552
2553static int resp_temp_l_pg(unsigned char *arr)
2554{
2555 unsigned char temp_l_pg[] = {0x0, 0x0, 0x3, 0x2, 0x0, 38,
2556 0x0, 0x1, 0x3, 0x2, 0x0, 65,
2557 };
2558
2559 memcpy(arr, temp_l_pg, sizeof(temp_l_pg));
2560 return sizeof(temp_l_pg);
2561}
2562
2563static int resp_ie_l_pg(unsigned char *arr)
2564{
2565 unsigned char ie_l_pg[] = {0x0, 0x0, 0x3, 0x3, 0x0, 0x0, 38,
2566 };
2567
2568 memcpy(arr, ie_l_pg, sizeof(ie_l_pg));
2569 if (iec_m_pg[2] & 0x4) { /* TEST bit set */
2570 arr[4] = THRESHOLD_EXCEEDED;
2571 arr[5] = 0xff;
2572 }
2573 return sizeof(ie_l_pg);
2574}
2575
2576#define SDEBUG_MAX_LSENSE_SZ 512
2577
2578static int resp_log_sense(struct scsi_cmnd *scp,
2579 struct sdebug_dev_info *devip)
2580{
2581 int ppc, sp, pcode, subpcode, alloc_len, len, n;
2582 unsigned char arr[SDEBUG_MAX_LSENSE_SZ];
2583 unsigned char *cmd = scp->cmnd;
2584
2585 memset(arr, 0, sizeof(arr));
2586 ppc = cmd[1] & 0x2;
2587 sp = cmd[1] & 0x1;
2588 if (ppc || sp) {
2589 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, ppc ? 1 : 0);
2590 return check_condition_result;
2591 }
2592 pcode = cmd[2] & 0x3f;
2593 subpcode = cmd[3] & 0xff;
2594 alloc_len = get_unaligned_be16(cmd + 7);
2595 arr[0] = pcode;
2596 if (0 == subpcode) {
2597 switch (pcode) {
2598 case 0x0: /* Supported log pages log page */
2599 n = 4;
2600 arr[n++] = 0x0; /* this page */
2601 arr[n++] = 0xd; /* Temperature */
2602 arr[n++] = 0x2f; /* Informational exceptions */
2603 arr[3] = n - 4;
2604 break;
2605 case 0xd: /* Temperature log page */
2606 arr[3] = resp_temp_l_pg(arr + 4);
2607 break;
2608 case 0x2f: /* Informational exceptions log page */
2609 arr[3] = resp_ie_l_pg(arr + 4);
2610 break;
2611 default:
2612 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 5);
2613 return check_condition_result;
2614 }
2615 } else if (0xff == subpcode) {
2616 arr[0] |= 0x40;
2617 arr[1] = subpcode;
2618 switch (pcode) {
2619 case 0x0: /* Supported log pages and subpages log page */
2620 n = 4;
2621 arr[n++] = 0x0;
2622 arr[n++] = 0x0; /* 0,0 page */
2623 arr[n++] = 0x0;
2624 arr[n++] = 0xff; /* this page */
2625 arr[n++] = 0xd;
2626 arr[n++] = 0x0; /* Temperature */
2627 arr[n++] = 0x2f;
2628 arr[n++] = 0x0; /* Informational exceptions */
2629 arr[3] = n - 4;
2630 break;
2631 case 0xd: /* Temperature subpages */
2632 n = 4;
2633 arr[n++] = 0xd;
2634 arr[n++] = 0x0; /* Temperature */
2635 arr[3] = n - 4;
2636 break;
2637 case 0x2f: /* Informational exceptions subpages */
2638 n = 4;
2639 arr[n++] = 0x2f;
2640 arr[n++] = 0x0; /* Informational exceptions */
2641 arr[3] = n - 4;
2642 break;
2643 default:
2644 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 5);
2645 return check_condition_result;
2646 }
2647 } else {
2648 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1);
2649 return check_condition_result;
2650 }
2651 len = min_t(int, get_unaligned_be16(arr + 2) + 4, alloc_len);
2652 return fill_from_dev_buffer(scp, arr,
2653 min_t(int, len, SDEBUG_MAX_INQ_ARR_SZ));
2654}
2655
2656static inline bool sdebug_dev_is_zoned(struct sdebug_dev_info *devip)
2657{
2658 return devip->nr_zones != 0;
2659}
2660
2661static struct sdeb_zone_state *zbc_zone(struct sdebug_dev_info *devip,
2662 unsigned long long lba)
2663{
2664 return &devip->zstate[lba >> devip->zsize_shift];
2665}
2666
2667static inline bool zbc_zone_is_conv(struct sdeb_zone_state *zsp)
2668{
2669 return zsp->z_type == ZBC_ZONE_TYPE_CNV;
2670}
2671
2672static void zbc_close_zone(struct sdebug_dev_info *devip,
2673 struct sdeb_zone_state *zsp)
2674{
2675 enum sdebug_z_cond zc;
2676
2677 if (zbc_zone_is_conv(zsp))
2678 return;
2679
2680 zc = zsp->z_cond;
2681 if (!(zc == ZC2_IMPLICIT_OPEN || zc == ZC3_EXPLICIT_OPEN))
2682 return;
2683
2684 if (zc == ZC2_IMPLICIT_OPEN)
2685 devip->nr_imp_open--;
2686 else
2687 devip->nr_exp_open--;
2688
2689 if (zsp->z_wp == zsp->z_start) {
2690 zsp->z_cond = ZC1_EMPTY;
2691 } else {
2692 zsp->z_cond = ZC4_CLOSED;
2693 devip->nr_closed++;
2694 }
2695}
2696
2697static void zbc_close_imp_open_zone(struct sdebug_dev_info *devip)
2698{
2699 struct sdeb_zone_state *zsp = &devip->zstate[0];
2700 unsigned int i;
2701
2702 for (i = 0; i < devip->nr_zones; i++, zsp++) {
2703 if (zsp->z_cond == ZC2_IMPLICIT_OPEN) {
2704 zbc_close_zone(devip, zsp);
2705 return;
2706 }
2707 }
2708}
2709
2710static void zbc_open_zone(struct sdebug_dev_info *devip,
2711 struct sdeb_zone_state *zsp, bool explicit)
2712{
2713 enum sdebug_z_cond zc;
2714
2715 if (zbc_zone_is_conv(zsp))
2716 return;
2717
2718 zc = zsp->z_cond;
2719 if ((explicit && zc == ZC3_EXPLICIT_OPEN) ||
2720 (!explicit && zc == ZC2_IMPLICIT_OPEN))
2721 return;
2722
2723 /* Close an implicit open zone if necessary */
2724 if (explicit && zsp->z_cond == ZC2_IMPLICIT_OPEN)
2725 zbc_close_zone(devip, zsp);
2726 else if (devip->max_open &&
2727 devip->nr_imp_open + devip->nr_exp_open >= devip->max_open)
2728 zbc_close_imp_open_zone(devip);
2729
2730 if (zsp->z_cond == ZC4_CLOSED)
2731 devip->nr_closed--;
2732 if (explicit) {
2733 zsp->z_cond = ZC3_EXPLICIT_OPEN;
2734 devip->nr_exp_open++;
2735 } else {
2736 zsp->z_cond = ZC2_IMPLICIT_OPEN;
2737 devip->nr_imp_open++;
2738 }
2739}
2740
2741static void zbc_inc_wp(struct sdebug_dev_info *devip,
2742 unsigned long long lba, unsigned int num)
2743{
2744 struct sdeb_zone_state *zsp = zbc_zone(devip, lba);
2745 unsigned long long n, end, zend = zsp->z_start + zsp->z_size;
2746
2747 if (zbc_zone_is_conv(zsp))
2748 return;
2749
2750 if (zsp->z_type == ZBC_ZONE_TYPE_SWR) {
2751 zsp->z_wp += num;
2752 if (zsp->z_wp >= zend)
2753 zsp->z_cond = ZC5_FULL;
2754 return;
2755 }
2756
2757 while (num) {
2758 if (lba != zsp->z_wp)
2759 zsp->z_non_seq_resource = true;
2760
2761 end = lba + num;
2762 if (end >= zend) {
2763 n = zend - lba;
2764 zsp->z_wp = zend;
2765 } else if (end > zsp->z_wp) {
2766 n = num;
2767 zsp->z_wp = end;
2768 } else {
2769 n = num;
2770 }
2771 if (zsp->z_wp >= zend)
2772 zsp->z_cond = ZC5_FULL;
2773
2774 num -= n;
2775 lba += n;
2776 if (num) {
2777 zsp++;
2778 zend = zsp->z_start + zsp->z_size;
2779 }
2780 }
2781}
2782
2783static int check_zbc_access_params(struct scsi_cmnd *scp,
2784 unsigned long long lba, unsigned int num, bool write)
2785{
2786 struct scsi_device *sdp = scp->device;
2787 struct sdebug_dev_info *devip = (struct sdebug_dev_info *)sdp->hostdata;
2788 struct sdeb_zone_state *zsp = zbc_zone(devip, lba);
2789 struct sdeb_zone_state *zsp_end = zbc_zone(devip, lba + num - 1);
2790
2791 if (!write) {
2792 if (devip->zmodel == BLK_ZONED_HA)
2793 return 0;
2794 /* For host-managed, reads cannot cross zone types boundaries */
2795 if (zsp_end != zsp &&
2796 zbc_zone_is_conv(zsp) &&
2797 !zbc_zone_is_conv(zsp_end)) {
2798 mk_sense_buffer(scp, ILLEGAL_REQUEST,
2799 LBA_OUT_OF_RANGE,
2800 READ_INVDATA_ASCQ);
2801 return check_condition_result;
2802 }
2803 return 0;
2804 }
2805
2806 /* No restrictions for writes within conventional zones */
2807 if (zbc_zone_is_conv(zsp)) {
2808 if (!zbc_zone_is_conv(zsp_end)) {
2809 mk_sense_buffer(scp, ILLEGAL_REQUEST,
2810 LBA_OUT_OF_RANGE,
2811 WRITE_BOUNDARY_ASCQ);
2812 return check_condition_result;
2813 }
2814 return 0;
2815 }
2816
2817 if (zsp->z_type == ZBC_ZONE_TYPE_SWR) {
2818 /* Writes cannot cross sequential zone boundaries */
2819 if (zsp_end != zsp) {
2820 mk_sense_buffer(scp, ILLEGAL_REQUEST,
2821 LBA_OUT_OF_RANGE,
2822 WRITE_BOUNDARY_ASCQ);
2823 return check_condition_result;
2824 }
2825 /* Cannot write full zones */
2826 if (zsp->z_cond == ZC5_FULL) {
2827 mk_sense_buffer(scp, ILLEGAL_REQUEST,
2828 INVALID_FIELD_IN_CDB, 0);
2829 return check_condition_result;
2830 }
2831 /* Writes must be aligned to the zone WP */
2832 if (lba != zsp->z_wp) {
2833 mk_sense_buffer(scp, ILLEGAL_REQUEST,
2834 LBA_OUT_OF_RANGE,
2835 UNALIGNED_WRITE_ASCQ);
2836 return check_condition_result;
2837 }
2838 }
2839
2840 /* Handle implicit open of closed and empty zones */
2841 if (zsp->z_cond == ZC1_EMPTY || zsp->z_cond == ZC4_CLOSED) {
2842 if (devip->max_open &&
2843 devip->nr_exp_open >= devip->max_open) {
2844 mk_sense_buffer(scp, DATA_PROTECT,
2845 INSUFF_RES_ASC,
2846 INSUFF_ZONE_ASCQ);
2847 return check_condition_result;
2848 }
2849 zbc_open_zone(devip, zsp, false);
2850 }
2851
2852 return 0;
2853}
2854
2855static inline int check_device_access_params
2856 (struct scsi_cmnd *scp, unsigned long long lba,
2857 unsigned int num, bool write)
2858{
2859 struct scsi_device *sdp = scp->device;
2860 struct sdebug_dev_info *devip = (struct sdebug_dev_info *)sdp->hostdata;
2861
2862 if (lba + num > sdebug_capacity) {
2863 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
2864 return check_condition_result;
2865 }
2866 /* transfer length excessive (tie in to block limits VPD page) */
2867 if (num > sdebug_store_sectors) {
2868 /* needs work to find which cdb byte 'num' comes from */
2869 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
2870 return check_condition_result;
2871 }
2872 if (write && unlikely(sdebug_wp)) {
2873 mk_sense_buffer(scp, DATA_PROTECT, WRITE_PROTECTED, 0x2);
2874 return check_condition_result;
2875 }
2876 if (sdebug_dev_is_zoned(devip))
2877 return check_zbc_access_params(scp, lba, num, write);
2878
2879 return 0;
2880}
2881
2882/*
2883 * Note: if BUG_ON() fires it usually indicates a problem with the parser
2884 * tables. Perhaps a missing F_FAKE_RW or FF_MEDIA_IO flag. Response functions
2885 * that access any of the "stores" in struct sdeb_store_info should call this
2886 * function with bug_if_fake_rw set to true.
2887 */
2888static inline struct sdeb_store_info *devip2sip(struct sdebug_dev_info *devip,
2889 bool bug_if_fake_rw)
2890{
2891 if (sdebug_fake_rw) {
2892 BUG_ON(bug_if_fake_rw); /* See note above */
2893 return NULL;
2894 }
2895 return xa_load(per_store_ap, devip->sdbg_host->si_idx);
2896}
2897
2898/* Returns number of bytes copied or -1 if error. */
2899static int do_device_access(struct sdeb_store_info *sip, struct scsi_cmnd *scp,
2900 u32 sg_skip, u64 lba, u32 num, bool do_write)
2901{
2902 int ret;
2903 u64 block, rest = 0;
2904 enum dma_data_direction dir;
2905 struct scsi_data_buffer *sdb = &scp->sdb;
2906 u8 *fsp;
2907
2908 if (do_write) {
2909 dir = DMA_TO_DEVICE;
2910 write_since_sync = true;
2911 } else {
2912 dir = DMA_FROM_DEVICE;
2913 }
2914
2915 if (!sdb->length || !sip)
2916 return 0;
2917 if (scp->sc_data_direction != dir)
2918 return -1;
2919 fsp = sip->storep;
2920
2921 block = do_div(lba, sdebug_store_sectors);
2922 if (block + num > sdebug_store_sectors)
2923 rest = block + num - sdebug_store_sectors;
2924
2925 ret = sg_copy_buffer(sdb->table.sgl, sdb->table.nents,
2926 fsp + (block * sdebug_sector_size),
2927 (num - rest) * sdebug_sector_size, sg_skip, do_write);
2928 if (ret != (num - rest) * sdebug_sector_size)
2929 return ret;
2930
2931 if (rest) {
2932 ret += sg_copy_buffer(sdb->table.sgl, sdb->table.nents,
2933 fsp, rest * sdebug_sector_size,
2934 sg_skip + ((num - rest) * sdebug_sector_size),
2935 do_write);
2936 }
2937
2938 return ret;
2939}
2940
2941/* Returns number of bytes copied or -1 if error. */
2942static int do_dout_fetch(struct scsi_cmnd *scp, u32 num, u8 *doutp)
2943{
2944 struct scsi_data_buffer *sdb = &scp->sdb;
2945
2946 if (!sdb->length)
2947 return 0;
2948 if (scp->sc_data_direction != DMA_TO_DEVICE)
2949 return -1;
2950 return sg_copy_buffer(sdb->table.sgl, sdb->table.nents, doutp,
2951 num * sdebug_sector_size, 0, true);
2952}
2953
2954/* If sip->storep+lba compares equal to arr(num), then copy top half of
2955 * arr into sip->storep+lba and return true. If comparison fails then
2956 * return false. */
2957static bool comp_write_worker(struct sdeb_store_info *sip, u64 lba, u32 num,
2958 const u8 *arr, bool compare_only)
2959{
2960 bool res;
2961 u64 block, rest = 0;
2962 u32 store_blks = sdebug_store_sectors;
2963 u32 lb_size = sdebug_sector_size;
2964 u8 *fsp = sip->storep;
2965
2966 block = do_div(lba, store_blks);
2967 if (block + num > store_blks)
2968 rest = block + num - store_blks;
2969
2970 res = !memcmp(fsp + (block * lb_size), arr, (num - rest) * lb_size);
2971 if (!res)
2972 return res;
2973 if (rest)
2974 res = memcmp(fsp, arr + ((num - rest) * lb_size),
2975 rest * lb_size);
2976 if (!res)
2977 return res;
2978 if (compare_only)
2979 return true;
2980 arr += num * lb_size;
2981 memcpy(fsp + (block * lb_size), arr, (num - rest) * lb_size);
2982 if (rest)
2983 memcpy(fsp, arr + ((num - rest) * lb_size), rest * lb_size);
2984 return res;
2985}
2986
2987static __be16 dif_compute_csum(const void *buf, int len)
2988{
2989 __be16 csum;
2990
2991 if (sdebug_guard)
2992 csum = (__force __be16)ip_compute_csum(buf, len);
2993 else
2994 csum = cpu_to_be16(crc_t10dif(buf, len));
2995
2996 return csum;
2997}
2998
2999static int dif_verify(struct t10_pi_tuple *sdt, const void *data,
3000 sector_t sector, u32 ei_lba)
3001{
3002 __be16 csum = dif_compute_csum(data, sdebug_sector_size);
3003
3004 if (sdt->guard_tag != csum) {
3005 pr_err("GUARD check failed on sector %lu rcvd 0x%04x, data 0x%04x\n",
3006 (unsigned long)sector,
3007 be16_to_cpu(sdt->guard_tag),
3008 be16_to_cpu(csum));
3009 return 0x01;
3010 }
3011 if (sdebug_dif == T10_PI_TYPE1_PROTECTION &&
3012 be32_to_cpu(sdt->ref_tag) != (sector & 0xffffffff)) {
3013 pr_err("REF check failed on sector %lu\n",
3014 (unsigned long)sector);
3015 return 0x03;
3016 }
3017 if (sdebug_dif == T10_PI_TYPE2_PROTECTION &&
3018 be32_to_cpu(sdt->ref_tag) != ei_lba) {
3019 pr_err("REF check failed on sector %lu\n",
3020 (unsigned long)sector);
3021 return 0x03;
3022 }
3023 return 0;
3024}
3025
3026static void dif_copy_prot(struct scsi_cmnd *scp, sector_t sector,
3027 unsigned int sectors, bool read)
3028{
3029 size_t resid;
3030 void *paddr;
3031 struct sdeb_store_info *sip = devip2sip((struct sdebug_dev_info *)
3032 scp->device->hostdata, true);
3033 struct t10_pi_tuple *dif_storep = sip->dif_storep;
3034 const void *dif_store_end = dif_storep + sdebug_store_sectors;
3035 struct sg_mapping_iter miter;
3036
3037 /* Bytes of protection data to copy into sgl */
3038 resid = sectors * sizeof(*dif_storep);
3039
3040 sg_miter_start(&miter, scsi_prot_sglist(scp),
3041 scsi_prot_sg_count(scp), SG_MITER_ATOMIC |
3042 (read ? SG_MITER_TO_SG : SG_MITER_FROM_SG));
3043
3044 while (sg_miter_next(&miter) && resid > 0) {
3045 size_t len = min_t(size_t, miter.length, resid);
3046 void *start = dif_store(sip, sector);
3047 size_t rest = 0;
3048
3049 if (dif_store_end < start + len)
3050 rest = start + len - dif_store_end;
3051
3052 paddr = miter.addr;
3053
3054 if (read)
3055 memcpy(paddr, start, len - rest);
3056 else
3057 memcpy(start, paddr, len - rest);
3058
3059 if (rest) {
3060 if (read)
3061 memcpy(paddr + len - rest, dif_storep, rest);
3062 else
3063 memcpy(dif_storep, paddr + len - rest, rest);
3064 }
3065
3066 sector += len / sizeof(*dif_storep);
3067 resid -= len;
3068 }
3069 sg_miter_stop(&miter);
3070}
3071
3072static int prot_verify_read(struct scsi_cmnd *scp, sector_t start_sec,
3073 unsigned int sectors, u32 ei_lba)
3074{
3075 unsigned int i;
3076 sector_t sector;
3077 struct sdeb_store_info *sip = devip2sip((struct sdebug_dev_info *)
3078 scp->device->hostdata, true);
3079 struct t10_pi_tuple *sdt;
3080
3081 for (i = 0; i < sectors; i++, ei_lba++) {
3082 int ret;
3083
3084 sector = start_sec + i;
3085 sdt = dif_store(sip, sector);
3086
3087 if (sdt->app_tag == cpu_to_be16(0xffff))
3088 continue;
3089
3090 ret = dif_verify(sdt, lba2fake_store(sip, sector), sector,
3091 ei_lba);
3092 if (ret) {
3093 dif_errors++;
3094 return ret;
3095 }
3096 }
3097
3098 dif_copy_prot(scp, start_sec, sectors, true);
3099 dix_reads++;
3100
3101 return 0;
3102}
3103
3104static int resp_read_dt0(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
3105{
3106 bool check_prot;
3107 u32 num;
3108 u32 ei_lba;
3109 int ret;
3110 u64 lba;
3111 struct sdeb_store_info *sip = devip2sip(devip, true);
3112 rwlock_t *macc_lckp = sip ? &sip->macc_lck : &sdeb_fake_rw_lck;
3113 u8 *cmd = scp->cmnd;
3114
3115 switch (cmd[0]) {
3116 case READ_16:
3117 ei_lba = 0;
3118 lba = get_unaligned_be64(cmd + 2);
3119 num = get_unaligned_be32(cmd + 10);
3120 check_prot = true;
3121 break;
3122 case READ_10:
3123 ei_lba = 0;
3124 lba = get_unaligned_be32(cmd + 2);
3125 num = get_unaligned_be16(cmd + 7);
3126 check_prot = true;
3127 break;
3128 case READ_6:
3129 ei_lba = 0;
3130 lba = (u32)cmd[3] | (u32)cmd[2] << 8 |
3131 (u32)(cmd[1] & 0x1f) << 16;
3132 num = (0 == cmd[4]) ? 256 : cmd[4];
3133 check_prot = true;
3134 break;
3135 case READ_12:
3136 ei_lba = 0;
3137 lba = get_unaligned_be32(cmd + 2);
3138 num = get_unaligned_be32(cmd + 6);
3139 check_prot = true;
3140 break;
3141 case XDWRITEREAD_10:
3142 ei_lba = 0;
3143 lba = get_unaligned_be32(cmd + 2);
3144 num = get_unaligned_be16(cmd + 7);
3145 check_prot = false;
3146 break;
3147 default: /* assume READ(32) */
3148 lba = get_unaligned_be64(cmd + 12);
3149 ei_lba = get_unaligned_be32(cmd + 20);
3150 num = get_unaligned_be32(cmd + 28);
3151 check_prot = false;
3152 break;
3153 }
3154 if (unlikely(have_dif_prot && check_prot)) {
3155 if (sdebug_dif == T10_PI_TYPE2_PROTECTION &&
3156 (cmd[1] & 0xe0)) {
3157 mk_sense_invalid_opcode(scp);
3158 return check_condition_result;
3159 }
3160 if ((sdebug_dif == T10_PI_TYPE1_PROTECTION ||
3161 sdebug_dif == T10_PI_TYPE3_PROTECTION) &&
3162 (cmd[1] & 0xe0) == 0)
3163 sdev_printk(KERN_ERR, scp->device, "Unprotected RD "
3164 "to DIF device\n");
3165 }
3166 if (unlikely((sdebug_opts & SDEBUG_OPT_SHORT_TRANSFER) &&
3167 atomic_read(&sdeb_inject_pending))) {
3168 num /= 2;
3169 atomic_set(&sdeb_inject_pending, 0);
3170 }
3171
3172 ret = check_device_access_params(scp, lba, num, false);
3173 if (ret)
3174 return ret;
3175 if (unlikely((SDEBUG_OPT_MEDIUM_ERR & sdebug_opts) &&
3176 (lba <= (sdebug_medium_error_start + sdebug_medium_error_count - 1)) &&
3177 ((lba + num) > sdebug_medium_error_start))) {
3178 /* claim unrecoverable read error */
3179 mk_sense_buffer(scp, MEDIUM_ERROR, UNRECOVERED_READ_ERR, 0);
3180 /* set info field and valid bit for fixed descriptor */
3181 if (0x70 == (scp->sense_buffer[0] & 0x7f)) {
3182 scp->sense_buffer[0] |= 0x80; /* Valid bit */
3183 ret = (lba < OPT_MEDIUM_ERR_ADDR)
3184 ? OPT_MEDIUM_ERR_ADDR : (int)lba;
3185 put_unaligned_be32(ret, scp->sense_buffer + 3);
3186 }
3187 scsi_set_resid(scp, scsi_bufflen(scp));
3188 return check_condition_result;
3189 }
3190
3191 read_lock(macc_lckp);
3192
3193 /* DIX + T10 DIF */
3194 if (unlikely(sdebug_dix && scsi_prot_sg_count(scp))) {
3195 int prot_ret = prot_verify_read(scp, lba, num, ei_lba);
3196
3197 if (prot_ret) {
3198 read_unlock(macc_lckp);
3199 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, prot_ret);
3200 return illegal_condition_result;
3201 }
3202 }
3203
3204 ret = do_device_access(sip, scp, 0, lba, num, false);
3205 read_unlock(macc_lckp);
3206 if (unlikely(ret == -1))
3207 return DID_ERROR << 16;
3208
3209 scsi_set_resid(scp, scsi_bufflen(scp) - ret);
3210
3211 if (unlikely((sdebug_opts & SDEBUG_OPT_RECOV_DIF_DIX) &&
3212 atomic_read(&sdeb_inject_pending))) {
3213 if (sdebug_opts & SDEBUG_OPT_RECOVERED_ERR) {
3214 mk_sense_buffer(scp, RECOVERED_ERROR, THRESHOLD_EXCEEDED, 0);
3215 atomic_set(&sdeb_inject_pending, 0);
3216 return check_condition_result;
3217 } else if (sdebug_opts & SDEBUG_OPT_DIF_ERR) {
3218 /* Logical block guard check failed */
3219 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 1);
3220 atomic_set(&sdeb_inject_pending, 0);
3221 return illegal_condition_result;
3222 } else if (SDEBUG_OPT_DIX_ERR & sdebug_opts) {
3223 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 1);
3224 atomic_set(&sdeb_inject_pending, 0);
3225 return illegal_condition_result;
3226 }
3227 }
3228 return 0;
3229}
3230
3231static void dump_sector(unsigned char *buf, int len)
3232{
3233 int i, j, n;
3234
3235 pr_err(">>> Sector Dump <<<\n");
3236 for (i = 0 ; i < len ; i += 16) {
3237 char b[128];
3238
3239 for (j = 0, n = 0; j < 16; j++) {
3240 unsigned char c = buf[i+j];
3241
3242 if (c >= 0x20 && c < 0x7e)
3243 n += scnprintf(b + n, sizeof(b) - n,
3244 " %c ", buf[i+j]);
3245 else
3246 n += scnprintf(b + n, sizeof(b) - n,
3247 "%02x ", buf[i+j]);
3248 }
3249 pr_err("%04d: %s\n", i, b);
3250 }
3251}
3252
3253static int prot_verify_write(struct scsi_cmnd *SCpnt, sector_t start_sec,
3254 unsigned int sectors, u32 ei_lba)
3255{
3256 int ret;
3257 struct t10_pi_tuple *sdt;
3258 void *daddr;
3259 sector_t sector = start_sec;
3260 int ppage_offset;
3261 int dpage_offset;
3262 struct sg_mapping_iter diter;
3263 struct sg_mapping_iter piter;
3264
3265 BUG_ON(scsi_sg_count(SCpnt) == 0);
3266 BUG_ON(scsi_prot_sg_count(SCpnt) == 0);
3267
3268 sg_miter_start(&piter, scsi_prot_sglist(SCpnt),
3269 scsi_prot_sg_count(SCpnt),
3270 SG_MITER_ATOMIC | SG_MITER_FROM_SG);
3271 sg_miter_start(&diter, scsi_sglist(SCpnt), scsi_sg_count(SCpnt),
3272 SG_MITER_ATOMIC | SG_MITER_FROM_SG);
3273
3274 /* For each protection page */
3275 while (sg_miter_next(&piter)) {
3276 dpage_offset = 0;
3277 if (WARN_ON(!sg_miter_next(&diter))) {
3278 ret = 0x01;
3279 goto out;
3280 }
3281
3282 for (ppage_offset = 0; ppage_offset < piter.length;
3283 ppage_offset += sizeof(struct t10_pi_tuple)) {
3284 /* If we're at the end of the current
3285 * data page advance to the next one
3286 */
3287 if (dpage_offset >= diter.length) {
3288 if (WARN_ON(!sg_miter_next(&diter))) {
3289 ret = 0x01;
3290 goto out;
3291 }
3292 dpage_offset = 0;
3293 }
3294
3295 sdt = piter.addr + ppage_offset;
3296 daddr = diter.addr + dpage_offset;
3297
3298 ret = dif_verify(sdt, daddr, sector, ei_lba);
3299 if (ret) {
3300 dump_sector(daddr, sdebug_sector_size);
3301 goto out;
3302 }
3303
3304 sector++;
3305 ei_lba++;
3306 dpage_offset += sdebug_sector_size;
3307 }
3308 diter.consumed = dpage_offset;
3309 sg_miter_stop(&diter);
3310 }
3311 sg_miter_stop(&piter);
3312
3313 dif_copy_prot(SCpnt, start_sec, sectors, false);
3314 dix_writes++;
3315
3316 return 0;
3317
3318out:
3319 dif_errors++;
3320 sg_miter_stop(&diter);
3321 sg_miter_stop(&piter);
3322 return ret;
3323}
3324
3325static unsigned long lba_to_map_index(sector_t lba)
3326{
3327 if (sdebug_unmap_alignment)
3328 lba += sdebug_unmap_granularity - sdebug_unmap_alignment;
3329 sector_div(lba, sdebug_unmap_granularity);
3330 return lba;
3331}
3332
3333static sector_t map_index_to_lba(unsigned long index)
3334{
3335 sector_t lba = index * sdebug_unmap_granularity;
3336
3337 if (sdebug_unmap_alignment)
3338 lba -= sdebug_unmap_granularity - sdebug_unmap_alignment;
3339 return lba;
3340}
3341
3342static unsigned int map_state(struct sdeb_store_info *sip, sector_t lba,
3343 unsigned int *num)
3344{
3345 sector_t end;
3346 unsigned int mapped;
3347 unsigned long index;
3348 unsigned long next;
3349
3350 index = lba_to_map_index(lba);
3351 mapped = test_bit(index, sip->map_storep);
3352
3353 if (mapped)
3354 next = find_next_zero_bit(sip->map_storep, map_size, index);
3355 else
3356 next = find_next_bit(sip->map_storep, map_size, index);
3357
3358 end = min_t(sector_t, sdebug_store_sectors, map_index_to_lba(next));
3359 *num = end - lba;
3360 return mapped;
3361}
3362
3363static void map_region(struct sdeb_store_info *sip, sector_t lba,
3364 unsigned int len)
3365{
3366 sector_t end = lba + len;
3367
3368 while (lba < end) {
3369 unsigned long index = lba_to_map_index(lba);
3370
3371 if (index < map_size)
3372 set_bit(index, sip->map_storep);
3373
3374 lba = map_index_to_lba(index + 1);
3375 }
3376}
3377
3378static void unmap_region(struct sdeb_store_info *sip, sector_t lba,
3379 unsigned int len)
3380{
3381 sector_t end = lba + len;
3382 u8 *fsp = sip->storep;
3383
3384 while (lba < end) {
3385 unsigned long index = lba_to_map_index(lba);
3386
3387 if (lba == map_index_to_lba(index) &&
3388 lba + sdebug_unmap_granularity <= end &&
3389 index < map_size) {
3390 clear_bit(index, sip->map_storep);
3391 if (sdebug_lbprz) { /* for LBPRZ=2 return 0xff_s */
3392 memset(fsp + lba * sdebug_sector_size,
3393 (sdebug_lbprz & 1) ? 0 : 0xff,
3394 sdebug_sector_size *
3395 sdebug_unmap_granularity);
3396 }
3397 if (sip->dif_storep) {
3398 memset(sip->dif_storep + lba, 0xff,
3399 sizeof(*sip->dif_storep) *
3400 sdebug_unmap_granularity);
3401 }
3402 }
3403 lba = map_index_to_lba(index + 1);
3404 }
3405}
3406
3407static int resp_write_dt0(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
3408{
3409 bool check_prot;
3410 u32 num;
3411 u32 ei_lba;
3412 int ret;
3413 u64 lba;
3414 struct sdeb_store_info *sip = devip2sip(devip, true);
3415 rwlock_t *macc_lckp = &sip->macc_lck;
3416 u8 *cmd = scp->cmnd;
3417
3418 switch (cmd[0]) {
3419 case WRITE_16:
3420 ei_lba = 0;
3421 lba = get_unaligned_be64(cmd + 2);
3422 num = get_unaligned_be32(cmd + 10);
3423 check_prot = true;
3424 break;
3425 case WRITE_10:
3426 ei_lba = 0;
3427 lba = get_unaligned_be32(cmd + 2);
3428 num = get_unaligned_be16(cmd + 7);
3429 check_prot = true;
3430 break;
3431 case WRITE_6:
3432 ei_lba = 0;
3433 lba = (u32)cmd[3] | (u32)cmd[2] << 8 |
3434 (u32)(cmd[1] & 0x1f) << 16;
3435 num = (0 == cmd[4]) ? 256 : cmd[4];
3436 check_prot = true;
3437 break;
3438 case WRITE_12:
3439 ei_lba = 0;
3440 lba = get_unaligned_be32(cmd + 2);
3441 num = get_unaligned_be32(cmd + 6);
3442 check_prot = true;
3443 break;
3444 case 0x53: /* XDWRITEREAD(10) */
3445 ei_lba = 0;
3446 lba = get_unaligned_be32(cmd + 2);
3447 num = get_unaligned_be16(cmd + 7);
3448 check_prot = false;
3449 break;
3450 default: /* assume WRITE(32) */
3451 lba = get_unaligned_be64(cmd + 12);
3452 ei_lba = get_unaligned_be32(cmd + 20);
3453 num = get_unaligned_be32(cmd + 28);
3454 check_prot = false;
3455 break;
3456 }
3457 if (unlikely(have_dif_prot && check_prot)) {
3458 if (sdebug_dif == T10_PI_TYPE2_PROTECTION &&
3459 (cmd[1] & 0xe0)) {
3460 mk_sense_invalid_opcode(scp);
3461 return check_condition_result;
3462 }
3463 if ((sdebug_dif == T10_PI_TYPE1_PROTECTION ||
3464 sdebug_dif == T10_PI_TYPE3_PROTECTION) &&
3465 (cmd[1] & 0xe0) == 0)
3466 sdev_printk(KERN_ERR, scp->device, "Unprotected WR "
3467 "to DIF device\n");
3468 }
3469
3470 write_lock(macc_lckp);
3471 ret = check_device_access_params(scp, lba, num, true);
3472 if (ret) {
3473 write_unlock(macc_lckp);
3474 return ret;
3475 }
3476
3477 /* DIX + T10 DIF */
3478 if (unlikely(sdebug_dix && scsi_prot_sg_count(scp))) {
3479 int prot_ret = prot_verify_write(scp, lba, num, ei_lba);
3480
3481 if (prot_ret) {
3482 write_unlock(macc_lckp);
3483 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, prot_ret);
3484 return illegal_condition_result;
3485 }
3486 }
3487
3488 ret = do_device_access(sip, scp, 0, lba, num, true);
3489 if (unlikely(scsi_debug_lbp()))
3490 map_region(sip, lba, num);
3491 /* If ZBC zone then bump its write pointer */
3492 if (sdebug_dev_is_zoned(devip))
3493 zbc_inc_wp(devip, lba, num);
3494 write_unlock(macc_lckp);
3495 if (unlikely(-1 == ret))
3496 return DID_ERROR << 16;
3497 else if (unlikely(sdebug_verbose &&
3498 (ret < (num * sdebug_sector_size))))
3499 sdev_printk(KERN_INFO, scp->device,
3500 "%s: write: cdb indicated=%u, IO sent=%d bytes\n",
3501 my_name, num * sdebug_sector_size, ret);
3502
3503 if (unlikely((sdebug_opts & SDEBUG_OPT_RECOV_DIF_DIX) &&
3504 atomic_read(&sdeb_inject_pending))) {
3505 if (sdebug_opts & SDEBUG_OPT_RECOVERED_ERR) {
3506 mk_sense_buffer(scp, RECOVERED_ERROR, THRESHOLD_EXCEEDED, 0);
3507 atomic_set(&sdeb_inject_pending, 0);
3508 return check_condition_result;
3509 } else if (sdebug_opts & SDEBUG_OPT_DIF_ERR) {
3510 /* Logical block guard check failed */
3511 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 1);
3512 atomic_set(&sdeb_inject_pending, 0);
3513 return illegal_condition_result;
3514 } else if (sdebug_opts & SDEBUG_OPT_DIX_ERR) {
3515 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 1);
3516 atomic_set(&sdeb_inject_pending, 0);
3517 return illegal_condition_result;
3518 }
3519 }
3520 return 0;
3521}
3522
3523/*
3524 * T10 has only specified WRITE SCATTERED(16) and WRITE SCATTERED(32).
3525 * No READ GATHERED yet (requires bidi or long cdb holding gather list).
3526 */
3527static int resp_write_scat(struct scsi_cmnd *scp,
3528 struct sdebug_dev_info *devip)
3529{
3530 u8 *cmd = scp->cmnd;
3531 u8 *lrdp = NULL;
3532 u8 *up;
3533 struct sdeb_store_info *sip = devip2sip(devip, true);
3534 rwlock_t *macc_lckp = &sip->macc_lck;
3535 u8 wrprotect;
3536 u16 lbdof, num_lrd, k;
3537 u32 num, num_by, bt_len, lbdof_blen, sg_off, cum_lb;
3538 u32 lb_size = sdebug_sector_size;
3539 u32 ei_lba;
3540 u64 lba;
3541 int ret, res;
3542 bool is_16;
3543 static const u32 lrd_size = 32; /* + parameter list header size */
3544
3545 if (cmd[0] == VARIABLE_LENGTH_CMD) {
3546 is_16 = false;
3547 wrprotect = (cmd[10] >> 5) & 0x7;
3548 lbdof = get_unaligned_be16(cmd + 12);
3549 num_lrd = get_unaligned_be16(cmd + 16);
3550 bt_len = get_unaligned_be32(cmd + 28);
3551 } else { /* that leaves WRITE SCATTERED(16) */
3552 is_16 = true;
3553 wrprotect = (cmd[2] >> 5) & 0x7;
3554 lbdof = get_unaligned_be16(cmd + 4);
3555 num_lrd = get_unaligned_be16(cmd + 8);
3556 bt_len = get_unaligned_be32(cmd + 10);
3557 if (unlikely(have_dif_prot)) {
3558 if (sdebug_dif == T10_PI_TYPE2_PROTECTION &&
3559 wrprotect) {
3560 mk_sense_invalid_opcode(scp);
3561 return illegal_condition_result;
3562 }
3563 if ((sdebug_dif == T10_PI_TYPE1_PROTECTION ||
3564 sdebug_dif == T10_PI_TYPE3_PROTECTION) &&
3565 wrprotect == 0)
3566 sdev_printk(KERN_ERR, scp->device,
3567 "Unprotected WR to DIF device\n");
3568 }
3569 }
3570 if ((num_lrd == 0) || (bt_len == 0))
3571 return 0; /* T10 says these do-nothings are not errors */
3572 if (lbdof == 0) {
3573 if (sdebug_verbose)
3574 sdev_printk(KERN_INFO, scp->device,
3575 "%s: %s: LB Data Offset field bad\n",
3576 my_name, __func__);
3577 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
3578 return illegal_condition_result;
3579 }
3580 lbdof_blen = lbdof * lb_size;
3581 if ((lrd_size + (num_lrd * lrd_size)) > lbdof_blen) {
3582 if (sdebug_verbose)
3583 sdev_printk(KERN_INFO, scp->device,
3584 "%s: %s: LBA range descriptors don't fit\n",
3585 my_name, __func__);
3586 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
3587 return illegal_condition_result;
3588 }
3589 lrdp = kzalloc(lbdof_blen, GFP_ATOMIC);
3590 if (lrdp == NULL)
3591 return SCSI_MLQUEUE_HOST_BUSY;
3592 if (sdebug_verbose)
3593 sdev_printk(KERN_INFO, scp->device,
3594 "%s: %s: Fetch header+scatter_list, lbdof_blen=%u\n",
3595 my_name, __func__, lbdof_blen);
3596 res = fetch_to_dev_buffer(scp, lrdp, lbdof_blen);
3597 if (res == -1) {
3598 ret = DID_ERROR << 16;
3599 goto err_out;
3600 }
3601
3602 write_lock(macc_lckp);
3603 sg_off = lbdof_blen;
3604 /* Spec says Buffer xfer Length field in number of LBs in dout */
3605 cum_lb = 0;
3606 for (k = 0, up = lrdp + lrd_size; k < num_lrd; ++k, up += lrd_size) {
3607 lba = get_unaligned_be64(up + 0);
3608 num = get_unaligned_be32(up + 8);
3609 if (sdebug_verbose)
3610 sdev_printk(KERN_INFO, scp->device,
3611 "%s: %s: k=%d LBA=0x%llx num=%u sg_off=%u\n",
3612 my_name, __func__, k, lba, num, sg_off);
3613 if (num == 0)
3614 continue;
3615 ret = check_device_access_params(scp, lba, num, true);
3616 if (ret)
3617 goto err_out_unlock;
3618 num_by = num * lb_size;
3619 ei_lba = is_16 ? 0 : get_unaligned_be32(up + 12);
3620
3621 if ((cum_lb + num) > bt_len) {
3622 if (sdebug_verbose)
3623 sdev_printk(KERN_INFO, scp->device,
3624 "%s: %s: sum of blocks > data provided\n",
3625 my_name, __func__);
3626 mk_sense_buffer(scp, ILLEGAL_REQUEST, WRITE_ERROR_ASC,
3627 0);
3628 ret = illegal_condition_result;
3629 goto err_out_unlock;
3630 }
3631
3632 /* DIX + T10 DIF */
3633 if (unlikely(sdebug_dix && scsi_prot_sg_count(scp))) {
3634 int prot_ret = prot_verify_write(scp, lba, num,
3635 ei_lba);
3636
3637 if (prot_ret) {
3638 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10,
3639 prot_ret);
3640 ret = illegal_condition_result;
3641 goto err_out_unlock;
3642 }
3643 }
3644
3645 ret = do_device_access(sip, scp, sg_off, lba, num, true);
3646 /* If ZBC zone then bump its write pointer */
3647 if (sdebug_dev_is_zoned(devip))
3648 zbc_inc_wp(devip, lba, num);
3649 if (unlikely(scsi_debug_lbp()))
3650 map_region(sip, lba, num);
3651 if (unlikely(-1 == ret)) {
3652 ret = DID_ERROR << 16;
3653 goto err_out_unlock;
3654 } else if (unlikely(sdebug_verbose && (ret < num_by)))
3655 sdev_printk(KERN_INFO, scp->device,
3656 "%s: write: cdb indicated=%u, IO sent=%d bytes\n",
3657 my_name, num_by, ret);
3658
3659 if (unlikely((sdebug_opts & SDEBUG_OPT_RECOV_DIF_DIX) &&
3660 atomic_read(&sdeb_inject_pending))) {
3661 if (sdebug_opts & SDEBUG_OPT_RECOVERED_ERR) {
3662 mk_sense_buffer(scp, RECOVERED_ERROR, THRESHOLD_EXCEEDED, 0);
3663 atomic_set(&sdeb_inject_pending, 0);
3664 ret = check_condition_result;
3665 goto err_out_unlock;
3666 } else if (sdebug_opts & SDEBUG_OPT_DIF_ERR) {
3667 /* Logical block guard check failed */
3668 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 1);
3669 atomic_set(&sdeb_inject_pending, 0);
3670 ret = illegal_condition_result;
3671 goto err_out_unlock;
3672 } else if (sdebug_opts & SDEBUG_OPT_DIX_ERR) {
3673 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 1);
3674 atomic_set(&sdeb_inject_pending, 0);
3675 ret = illegal_condition_result;
3676 goto err_out_unlock;
3677 }
3678 }
3679 sg_off += num_by;
3680 cum_lb += num;
3681 }
3682 ret = 0;
3683err_out_unlock:
3684 write_unlock(macc_lckp);
3685err_out:
3686 kfree(lrdp);
3687 return ret;
3688}
3689
3690static int resp_write_same(struct scsi_cmnd *scp, u64 lba, u32 num,
3691 u32 ei_lba, bool unmap, bool ndob)
3692{
3693 struct scsi_device *sdp = scp->device;
3694 struct sdebug_dev_info *devip = (struct sdebug_dev_info *)sdp->hostdata;
3695 unsigned long long i;
3696 u64 block, lbaa;
3697 u32 lb_size = sdebug_sector_size;
3698 int ret;
3699 struct sdeb_store_info *sip = devip2sip((struct sdebug_dev_info *)
3700 scp->device->hostdata, true);
3701 rwlock_t *macc_lckp = &sip->macc_lck;
3702 u8 *fs1p;
3703 u8 *fsp;
3704
3705 write_lock(macc_lckp);
3706
3707 ret = check_device_access_params(scp, lba, num, true);
3708 if (ret) {
3709 write_unlock(macc_lckp);
3710 return ret;
3711 }
3712
3713 if (unmap && scsi_debug_lbp()) {
3714 unmap_region(sip, lba, num);
3715 goto out;
3716 }
3717 lbaa = lba;
3718 block = do_div(lbaa, sdebug_store_sectors);
3719 /* if ndob then zero 1 logical block, else fetch 1 logical block */
3720 fsp = sip->storep;
3721 fs1p = fsp + (block * lb_size);
3722 if (ndob) {
3723 memset(fs1p, 0, lb_size);
3724 ret = 0;
3725 } else
3726 ret = fetch_to_dev_buffer(scp, fs1p, lb_size);
3727
3728 if (-1 == ret) {
3729 write_unlock(&sip->macc_lck);
3730 return DID_ERROR << 16;
3731 } else if (sdebug_verbose && !ndob && (ret < lb_size))
3732 sdev_printk(KERN_INFO, scp->device,
3733 "%s: %s: lb size=%u, IO sent=%d bytes\n",
3734 my_name, "write same", lb_size, ret);
3735
3736 /* Copy first sector to remaining blocks */
3737 for (i = 1 ; i < num ; i++) {
3738 lbaa = lba + i;
3739 block = do_div(lbaa, sdebug_store_sectors);
3740 memmove(fsp + (block * lb_size), fs1p, lb_size);
3741 }
3742 if (scsi_debug_lbp())
3743 map_region(sip, lba, num);
3744 /* If ZBC zone then bump its write pointer */
3745 if (sdebug_dev_is_zoned(devip))
3746 zbc_inc_wp(devip, lba, num);
3747out:
3748 write_unlock(macc_lckp);
3749
3750 return 0;
3751}
3752
3753static int resp_write_same_10(struct scsi_cmnd *scp,
3754 struct sdebug_dev_info *devip)
3755{
3756 u8 *cmd = scp->cmnd;
3757 u32 lba;
3758 u16 num;
3759 u32 ei_lba = 0;
3760 bool unmap = false;
3761
3762 if (cmd[1] & 0x8) {
3763 if (sdebug_lbpws10 == 0) {
3764 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 3);
3765 return check_condition_result;
3766 } else
3767 unmap = true;
3768 }
3769 lba = get_unaligned_be32(cmd + 2);
3770 num = get_unaligned_be16(cmd + 7);
3771 if (num > sdebug_write_same_length) {
3772 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 7, -1);
3773 return check_condition_result;
3774 }
3775 return resp_write_same(scp, lba, num, ei_lba, unmap, false);
3776}
3777
3778static int resp_write_same_16(struct scsi_cmnd *scp,
3779 struct sdebug_dev_info *devip)
3780{
3781 u8 *cmd = scp->cmnd;
3782 u64 lba;
3783 u32 num;
3784 u32 ei_lba = 0;
3785 bool unmap = false;
3786 bool ndob = false;
3787
3788 if (cmd[1] & 0x8) { /* UNMAP */
3789 if (sdebug_lbpws == 0) {
3790 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 3);
3791 return check_condition_result;
3792 } else
3793 unmap = true;
3794 }
3795 if (cmd[1] & 0x1) /* NDOB (no data-out buffer, assumes zeroes) */
3796 ndob = true;
3797 lba = get_unaligned_be64(cmd + 2);
3798 num = get_unaligned_be32(cmd + 10);
3799 if (num > sdebug_write_same_length) {
3800 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 10, -1);
3801 return check_condition_result;
3802 }
3803 return resp_write_same(scp, lba, num, ei_lba, unmap, ndob);
3804}
3805
3806/* Note the mode field is in the same position as the (lower) service action
3807 * field. For the Report supported operation codes command, SPC-4 suggests
3808 * each mode of this command should be reported separately; for future. */
3809static int resp_write_buffer(struct scsi_cmnd *scp,
3810 struct sdebug_dev_info *devip)
3811{
3812 u8 *cmd = scp->cmnd;
3813 struct scsi_device *sdp = scp->device;
3814 struct sdebug_dev_info *dp;
3815 u8 mode;
3816
3817 mode = cmd[1] & 0x1f;
3818 switch (mode) {
3819 case 0x4: /* download microcode (MC) and activate (ACT) */
3820 /* set UAs on this device only */
3821 set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm);
3822 set_bit(SDEBUG_UA_MICROCODE_CHANGED, devip->uas_bm);
3823 break;
3824 case 0x5: /* download MC, save and ACT */
3825 set_bit(SDEBUG_UA_MICROCODE_CHANGED_WO_RESET, devip->uas_bm);
3826 break;
3827 case 0x6: /* download MC with offsets and ACT */
3828 /* set UAs on most devices (LUs) in this target */
3829 list_for_each_entry(dp,
3830 &devip->sdbg_host->dev_info_list,
3831 dev_list)
3832 if (dp->target == sdp->id) {
3833 set_bit(SDEBUG_UA_BUS_RESET, dp->uas_bm);
3834 if (devip != dp)
3835 set_bit(SDEBUG_UA_MICROCODE_CHANGED,
3836 dp->uas_bm);
3837 }
3838 break;
3839 case 0x7: /* download MC with offsets, save, and ACT */
3840 /* set UA on all devices (LUs) in this target */
3841 list_for_each_entry(dp,
3842 &devip->sdbg_host->dev_info_list,
3843 dev_list)
3844 if (dp->target == sdp->id)
3845 set_bit(SDEBUG_UA_MICROCODE_CHANGED_WO_RESET,
3846 dp->uas_bm);
3847 break;
3848 default:
3849 /* do nothing for this command for other mode values */
3850 break;
3851 }
3852 return 0;
3853}
3854
3855static int resp_comp_write(struct scsi_cmnd *scp,
3856 struct sdebug_dev_info *devip)
3857{
3858 u8 *cmd = scp->cmnd;
3859 u8 *arr;
3860 struct sdeb_store_info *sip = devip2sip(devip, true);
3861 rwlock_t *macc_lckp = &sip->macc_lck;
3862 u64 lba;
3863 u32 dnum;
3864 u32 lb_size = sdebug_sector_size;
3865 u8 num;
3866 int ret;
3867 int retval = 0;
3868
3869 lba = get_unaligned_be64(cmd + 2);
3870 num = cmd[13]; /* 1 to a maximum of 255 logical blocks */
3871 if (0 == num)
3872 return 0; /* degenerate case, not an error */
3873 if (sdebug_dif == T10_PI_TYPE2_PROTECTION &&
3874 (cmd[1] & 0xe0)) {
3875 mk_sense_invalid_opcode(scp);
3876 return check_condition_result;
3877 }
3878 if ((sdebug_dif == T10_PI_TYPE1_PROTECTION ||
3879 sdebug_dif == T10_PI_TYPE3_PROTECTION) &&
3880 (cmd[1] & 0xe0) == 0)
3881 sdev_printk(KERN_ERR, scp->device, "Unprotected WR "
3882 "to DIF device\n");
3883 ret = check_device_access_params(scp, lba, num, false);
3884 if (ret)
3885 return ret;
3886 dnum = 2 * num;
3887 arr = kcalloc(lb_size, dnum, GFP_ATOMIC);
3888 if (NULL == arr) {
3889 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
3890 INSUFF_RES_ASCQ);
3891 return check_condition_result;
3892 }
3893
3894 write_lock(macc_lckp);
3895
3896 ret = do_dout_fetch(scp, dnum, arr);
3897 if (ret == -1) {
3898 retval = DID_ERROR << 16;
3899 goto cleanup;
3900 } else if (sdebug_verbose && (ret < (dnum * lb_size)))
3901 sdev_printk(KERN_INFO, scp->device, "%s: compare_write: cdb "
3902 "indicated=%u, IO sent=%d bytes\n", my_name,
3903 dnum * lb_size, ret);
3904 if (!comp_write_worker(sip, lba, num, arr, false)) {
3905 mk_sense_buffer(scp, MISCOMPARE, MISCOMPARE_VERIFY_ASC, 0);
3906 retval = check_condition_result;
3907 goto cleanup;
3908 }
3909 if (scsi_debug_lbp())
3910 map_region(sip, lba, num);
3911cleanup:
3912 write_unlock(macc_lckp);
3913 kfree(arr);
3914 return retval;
3915}
3916
3917struct unmap_block_desc {
3918 __be64 lba;
3919 __be32 blocks;
3920 __be32 __reserved;
3921};
3922
3923static int resp_unmap(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
3924{
3925 unsigned char *buf;
3926 struct unmap_block_desc *desc;
3927 struct sdeb_store_info *sip = devip2sip(devip, true);
3928 rwlock_t *macc_lckp = &sip->macc_lck;
3929 unsigned int i, payload_len, descriptors;
3930 int ret;
3931
3932 if (!scsi_debug_lbp())
3933 return 0; /* fib and say its done */
3934 payload_len = get_unaligned_be16(scp->cmnd + 7);
3935 BUG_ON(scsi_bufflen(scp) != payload_len);
3936
3937 descriptors = (payload_len - 8) / 16;
3938 if (descriptors > sdebug_unmap_max_desc) {
3939 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 7, -1);
3940 return check_condition_result;
3941 }
3942
3943 buf = kzalloc(scsi_bufflen(scp), GFP_ATOMIC);
3944 if (!buf) {
3945 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
3946 INSUFF_RES_ASCQ);
3947 return check_condition_result;
3948 }
3949
3950 scsi_sg_copy_to_buffer(scp, buf, scsi_bufflen(scp));
3951
3952 BUG_ON(get_unaligned_be16(&buf[0]) != payload_len - 2);
3953 BUG_ON(get_unaligned_be16(&buf[2]) != descriptors * 16);
3954
3955 desc = (void *)&buf[8];
3956
3957 write_lock(macc_lckp);
3958
3959 for (i = 0 ; i < descriptors ; i++) {
3960 unsigned long long lba = get_unaligned_be64(&desc[i].lba);
3961 unsigned int num = get_unaligned_be32(&desc[i].blocks);
3962
3963 ret = check_device_access_params(scp, lba, num, true);
3964 if (ret)
3965 goto out;
3966
3967 unmap_region(sip, lba, num);
3968 }
3969
3970 ret = 0;
3971
3972out:
3973 write_unlock(macc_lckp);
3974 kfree(buf);
3975
3976 return ret;
3977}
3978
3979#define SDEBUG_GET_LBA_STATUS_LEN 32
3980
3981static int resp_get_lba_status(struct scsi_cmnd *scp,
3982 struct sdebug_dev_info *devip)
3983{
3984 u8 *cmd = scp->cmnd;
3985 u64 lba;
3986 u32 alloc_len, mapped, num;
3987 int ret;
3988 u8 arr[SDEBUG_GET_LBA_STATUS_LEN];
3989
3990 lba = get_unaligned_be64(cmd + 2);
3991 alloc_len = get_unaligned_be32(cmd + 10);
3992
3993 if (alloc_len < 24)
3994 return 0;
3995
3996 ret = check_device_access_params(scp, lba, 1, false);
3997 if (ret)
3998 return ret;
3999
4000 if (scsi_debug_lbp()) {
4001 struct sdeb_store_info *sip = devip2sip(devip, true);
4002
4003 mapped = map_state(sip, lba, &num);
4004 } else {
4005 mapped = 1;
4006 /* following just in case virtual_gb changed */
4007 sdebug_capacity = get_sdebug_capacity();
4008 if (sdebug_capacity - lba <= 0xffffffff)
4009 num = sdebug_capacity - lba;
4010 else
4011 num = 0xffffffff;
4012 }
4013
4014 memset(arr, 0, SDEBUG_GET_LBA_STATUS_LEN);
4015 put_unaligned_be32(20, arr); /* Parameter Data Length */
4016 put_unaligned_be64(lba, arr + 8); /* LBA */
4017 put_unaligned_be32(num, arr + 16); /* Number of blocks */
4018 arr[20] = !mapped; /* prov_stat=0: mapped; 1: dealloc */
4019
4020 return fill_from_dev_buffer(scp, arr, SDEBUG_GET_LBA_STATUS_LEN);
4021}
4022
4023static int resp_sync_cache(struct scsi_cmnd *scp,
4024 struct sdebug_dev_info *devip)
4025{
4026 int res = 0;
4027 u64 lba;
4028 u32 num_blocks;
4029 u8 *cmd = scp->cmnd;
4030
4031 if (cmd[0] == SYNCHRONIZE_CACHE) { /* 10 byte cdb */
4032 lba = get_unaligned_be32(cmd + 2);
4033 num_blocks = get_unaligned_be16(cmd + 7);
4034 } else { /* SYNCHRONIZE_CACHE(16) */
4035 lba = get_unaligned_be64(cmd + 2);
4036 num_blocks = get_unaligned_be32(cmd + 10);
4037 }
4038 if (lba + num_blocks > sdebug_capacity) {
4039 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
4040 return check_condition_result;
4041 }
4042 if (!write_since_sync || (cmd[1] & 0x2))
4043 res = SDEG_RES_IMMED_MASK;
4044 else /* delay if write_since_sync and IMMED clear */
4045 write_since_sync = false;
4046 return res;
4047}
4048
4049/*
4050 * Assuming the LBA+num_blocks is not out-of-range, this function will return
4051 * CONDITION MET if the specified blocks will/have fitted in the cache, and
4052 * a GOOD status otherwise. Model a disk with a big cache and yield
4053 * CONDITION MET. Actually tries to bring range in main memory into the
4054 * cache associated with the CPU(s).
4055 */
4056static int resp_pre_fetch(struct scsi_cmnd *scp,
4057 struct sdebug_dev_info *devip)
4058{
4059 int res = 0;
4060 u64 lba;
4061 u64 block, rest = 0;
4062 u32 nblks;
4063 u8 *cmd = scp->cmnd;
4064 struct sdeb_store_info *sip = devip2sip(devip, true);
4065 rwlock_t *macc_lckp = &sip->macc_lck;
4066 u8 *fsp = sip->storep;
4067
4068 if (cmd[0] == PRE_FETCH) { /* 10 byte cdb */
4069 lba = get_unaligned_be32(cmd + 2);
4070 nblks = get_unaligned_be16(cmd + 7);
4071 } else { /* PRE-FETCH(16) */
4072 lba = get_unaligned_be64(cmd + 2);
4073 nblks = get_unaligned_be32(cmd + 10);
4074 }
4075 if (lba + nblks > sdebug_capacity) {
4076 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
4077 return check_condition_result;
4078 }
4079 if (!fsp)
4080 goto fini;
4081 /* PRE-FETCH spec says nothing about LBP or PI so skip them */
4082 block = do_div(lba, sdebug_store_sectors);
4083 if (block + nblks > sdebug_store_sectors)
4084 rest = block + nblks - sdebug_store_sectors;
4085
4086 /* Try to bring the PRE-FETCH range into CPU's cache */
4087 read_lock(macc_lckp);
4088 prefetch_range(fsp + (sdebug_sector_size * block),
4089 (nblks - rest) * sdebug_sector_size);
4090 if (rest)
4091 prefetch_range(fsp, rest * sdebug_sector_size);
4092 read_unlock(macc_lckp);
4093fini:
4094 if (cmd[1] & 0x2)
4095 res = SDEG_RES_IMMED_MASK;
4096 return res | condition_met_result;
4097}
4098
4099#define RL_BUCKET_ELEMS 8
4100
4101/* Even though each pseudo target has a REPORT LUNS "well known logical unit"
4102 * (W-LUN), the normal Linux scanning logic does not associate it with a
4103 * device (e.g. /dev/sg7). The following magic will make that association:
4104 * "cd /sys/class/scsi_host/host<n> ; echo '- - 49409' > scan"
4105 * where <n> is a host number. If there are multiple targets in a host then
4106 * the above will associate a W-LUN to each target. To only get a W-LUN
4107 * for target 2, then use "echo '- 2 49409' > scan" .
4108 */
4109static int resp_report_luns(struct scsi_cmnd *scp,
4110 struct sdebug_dev_info *devip)
4111{
4112 unsigned char *cmd = scp->cmnd;
4113 unsigned int alloc_len;
4114 unsigned char select_report;
4115 u64 lun;
4116 struct scsi_lun *lun_p;
4117 u8 arr[RL_BUCKET_ELEMS * sizeof(struct scsi_lun)];
4118 unsigned int lun_cnt; /* normal LUN count (max: 256) */
4119 unsigned int wlun_cnt; /* report luns W-LUN count */
4120 unsigned int tlun_cnt; /* total LUN count */
4121 unsigned int rlen; /* response length (in bytes) */
4122 int k, j, n, res;
4123 unsigned int off_rsp = 0;
4124 const int sz_lun = sizeof(struct scsi_lun);
4125
4126 clear_luns_changed_on_target(devip);
4127
4128 select_report = cmd[2];
4129 alloc_len = get_unaligned_be32(cmd + 6);
4130
4131 if (alloc_len < 4) {
4132 pr_err("alloc len too small %d\n", alloc_len);
4133 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 6, -1);
4134 return check_condition_result;
4135 }
4136
4137 switch (select_report) {
4138 case 0: /* all LUNs apart from W-LUNs */
4139 lun_cnt = sdebug_max_luns;
4140 wlun_cnt = 0;
4141 break;
4142 case 1: /* only W-LUNs */
4143 lun_cnt = 0;
4144 wlun_cnt = 1;
4145 break;
4146 case 2: /* all LUNs */
4147 lun_cnt = sdebug_max_luns;
4148 wlun_cnt = 1;
4149 break;
4150 case 0x10: /* only administrative LUs */
4151 case 0x11: /* see SPC-5 */
4152 case 0x12: /* only subsiduary LUs owned by referenced LU */
4153 default:
4154 pr_debug("select report invalid %d\n", select_report);
4155 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, -1);
4156 return check_condition_result;
4157 }
4158
4159 if (sdebug_no_lun_0 && (lun_cnt > 0))
4160 --lun_cnt;
4161
4162 tlun_cnt = lun_cnt + wlun_cnt;
4163 rlen = tlun_cnt * sz_lun; /* excluding 8 byte header */
4164 scsi_set_resid(scp, scsi_bufflen(scp));
4165 pr_debug("select_report %d luns = %d wluns = %d no_lun0 %d\n",
4166 select_report, lun_cnt, wlun_cnt, sdebug_no_lun_0);
4167
4168 /* loops rely on sizeof response header same as sizeof lun (both 8) */
4169 lun = sdebug_no_lun_0 ? 1 : 0;
4170 for (k = 0, j = 0, res = 0; true; ++k, j = 0) {
4171 memset(arr, 0, sizeof(arr));
4172 lun_p = (struct scsi_lun *)&arr[0];
4173 if (k == 0) {
4174 put_unaligned_be32(rlen, &arr[0]);
4175 ++lun_p;
4176 j = 1;
4177 }
4178 for ( ; j < RL_BUCKET_ELEMS; ++j, ++lun_p) {
4179 if ((k * RL_BUCKET_ELEMS) + j > lun_cnt)
4180 break;
4181 int_to_scsilun(lun++, lun_p);
4182 }
4183 if (j < RL_BUCKET_ELEMS)
4184 break;
4185 n = j * sz_lun;
4186 res = p_fill_from_dev_buffer(scp, arr, n, off_rsp);
4187 if (res)
4188 return res;
4189 off_rsp += n;
4190 }
4191 if (wlun_cnt) {
4192 int_to_scsilun(SCSI_W_LUN_REPORT_LUNS, lun_p);
4193 ++j;
4194 }
4195 if (j > 0)
4196 res = p_fill_from_dev_buffer(scp, arr, j * sz_lun, off_rsp);
4197 return res;
4198}
4199
4200static int resp_verify(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
4201{
4202 bool is_bytchk3 = false;
4203 u8 bytchk;
4204 int ret, j;
4205 u32 vnum, a_num, off;
4206 const u32 lb_size = sdebug_sector_size;
4207 u64 lba;
4208 u8 *arr;
4209 u8 *cmd = scp->cmnd;
4210 struct sdeb_store_info *sip = devip2sip(devip, true);
4211 rwlock_t *macc_lckp = &sip->macc_lck;
4212
4213 bytchk = (cmd[1] >> 1) & 0x3;
4214 if (bytchk == 0) {
4215 return 0; /* always claim internal verify okay */
4216 } else if (bytchk == 2) {
4217 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 2);
4218 return check_condition_result;
4219 } else if (bytchk == 3) {
4220 is_bytchk3 = true; /* 1 block sent, compared repeatedly */
4221 }
4222 switch (cmd[0]) {
4223 case VERIFY_16:
4224 lba = get_unaligned_be64(cmd + 2);
4225 vnum = get_unaligned_be32(cmd + 10);
4226 break;
4227 case VERIFY: /* is VERIFY(10) */
4228 lba = get_unaligned_be32(cmd + 2);
4229 vnum = get_unaligned_be16(cmd + 7);
4230 break;
4231 default:
4232 mk_sense_invalid_opcode(scp);
4233 return check_condition_result;
4234 }
4235 a_num = is_bytchk3 ? 1 : vnum;
4236 /* Treat following check like one for read (i.e. no write) access */
4237 ret = check_device_access_params(scp, lba, a_num, false);
4238 if (ret)
4239 return ret;
4240
4241 arr = kcalloc(lb_size, vnum, GFP_ATOMIC);
4242 if (!arr) {
4243 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
4244 INSUFF_RES_ASCQ);
4245 return check_condition_result;
4246 }
4247 /* Not changing store, so only need read access */
4248 read_lock(macc_lckp);
4249
4250 ret = do_dout_fetch(scp, a_num, arr);
4251 if (ret == -1) {
4252 ret = DID_ERROR << 16;
4253 goto cleanup;
4254 } else if (sdebug_verbose && (ret < (a_num * lb_size))) {
4255 sdev_printk(KERN_INFO, scp->device,
4256 "%s: %s: cdb indicated=%u, IO sent=%d bytes\n",
4257 my_name, __func__, a_num * lb_size, ret);
4258 }
4259 if (is_bytchk3) {
4260 for (j = 1, off = lb_size; j < vnum; ++j, off += lb_size)
4261 memcpy(arr + off, arr, lb_size);
4262 }
4263 ret = 0;
4264 if (!comp_write_worker(sip, lba, vnum, arr, true)) {
4265 mk_sense_buffer(scp, MISCOMPARE, MISCOMPARE_VERIFY_ASC, 0);
4266 ret = check_condition_result;
4267 goto cleanup;
4268 }
4269cleanup:
4270 read_unlock(macc_lckp);
4271 kfree(arr);
4272 return ret;
4273}
4274
4275#define RZONES_DESC_HD 64
4276
4277/* Report zones depending on start LBA nad reporting options */
4278static int resp_report_zones(struct scsi_cmnd *scp,
4279 struct sdebug_dev_info *devip)
4280{
4281 unsigned int i, max_zones, rep_max_zones, nrz = 0;
4282 int ret = 0;
4283 u32 alloc_len, rep_opts, rep_len;
4284 bool partial;
4285 u64 lba, zs_lba;
4286 u8 *arr = NULL, *desc;
4287 u8 *cmd = scp->cmnd;
4288 struct sdeb_zone_state *zsp;
4289 struct sdeb_store_info *sip = devip2sip(devip, false);
4290 rwlock_t *macc_lckp = sip ? &sip->macc_lck : &sdeb_fake_rw_lck;
4291
4292 if (!sdebug_dev_is_zoned(devip)) {
4293 mk_sense_invalid_opcode(scp);
4294 return check_condition_result;
4295 }
4296 zs_lba = get_unaligned_be64(cmd + 2);
4297 alloc_len = get_unaligned_be32(cmd + 10);
4298 rep_opts = cmd[14] & 0x3f;
4299 partial = cmd[14] & 0x80;
4300
4301 if (zs_lba >= sdebug_capacity) {
4302 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
4303 return check_condition_result;
4304 }
4305
4306 max_zones = devip->nr_zones - (zs_lba >> devip->zsize_shift);
4307 rep_max_zones = min((alloc_len - 64) >> ilog2(RZONES_DESC_HD),
4308 max_zones);
4309
4310 arr = kcalloc(RZONES_DESC_HD, alloc_len, GFP_ATOMIC);
4311 if (!arr) {
4312 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
4313 INSUFF_RES_ASCQ);
4314 return check_condition_result;
4315 }
4316
4317 read_lock(macc_lckp);
4318
4319 desc = arr + 64;
4320 for (i = 0; i < max_zones; i++) {
4321 lba = zs_lba + devip->zsize * i;
4322 if (lba > sdebug_capacity)
4323 break;
4324 zsp = zbc_zone(devip, lba);
4325 switch (rep_opts) {
4326 case 0x00:
4327 /* All zones */
4328 break;
4329 case 0x01:
4330 /* Empty zones */
4331 if (zsp->z_cond != ZC1_EMPTY)
4332 continue;
4333 break;
4334 case 0x02:
4335 /* Implicit open zones */
4336 if (zsp->z_cond != ZC2_IMPLICIT_OPEN)
4337 continue;
4338 break;
4339 case 0x03:
4340 /* Explicit open zones */
4341 if (zsp->z_cond != ZC3_EXPLICIT_OPEN)
4342 continue;
4343 break;
4344 case 0x04:
4345 /* Closed zones */
4346 if (zsp->z_cond != ZC4_CLOSED)
4347 continue;
4348 break;
4349 case 0x05:
4350 /* Full zones */
4351 if (zsp->z_cond != ZC5_FULL)
4352 continue;
4353 break;
4354 case 0x06:
4355 case 0x07:
4356 case 0x10:
4357 /*
4358 * Read-only, offline, reset WP recommended are
4359 * not emulated: no zones to report;
4360 */
4361 continue;
4362 case 0x11:
4363 /* non-seq-resource set */
4364 if (!zsp->z_non_seq_resource)
4365 continue;
4366 break;
4367 case 0x3f:
4368 /* Not write pointer (conventional) zones */
4369 if (!zbc_zone_is_conv(zsp))
4370 continue;
4371 break;
4372 default:
4373 mk_sense_buffer(scp, ILLEGAL_REQUEST,
4374 INVALID_FIELD_IN_CDB, 0);
4375 ret = check_condition_result;
4376 goto fini;
4377 }
4378
4379 if (nrz < rep_max_zones) {
4380 /* Fill zone descriptor */
4381 desc[0] = zsp->z_type;
4382 desc[1] = zsp->z_cond << 4;
4383 if (zsp->z_non_seq_resource)
4384 desc[1] |= 1 << 1;
4385 put_unaligned_be64((u64)zsp->z_size, desc + 8);
4386 put_unaligned_be64((u64)zsp->z_start, desc + 16);
4387 put_unaligned_be64((u64)zsp->z_wp, desc + 24);
4388 desc += 64;
4389 }
4390
4391 if (partial && nrz >= rep_max_zones)
4392 break;
4393
4394 nrz++;
4395 }
4396
4397 /* Report header */
4398 put_unaligned_be32(nrz * RZONES_DESC_HD, arr + 0);
4399 put_unaligned_be64(sdebug_capacity - 1, arr + 8);
4400
4401 rep_len = (unsigned long)desc - (unsigned long)arr;
4402 ret = fill_from_dev_buffer(scp, arr, min_t(int, alloc_len, rep_len));
4403
4404fini:
4405 read_unlock(macc_lckp);
4406 kfree(arr);
4407 return ret;
4408}
4409
4410/* Logic transplanted from tcmu-runner, file_zbc.c */
4411static void zbc_open_all(struct sdebug_dev_info *devip)
4412{
4413 struct sdeb_zone_state *zsp = &devip->zstate[0];
4414 unsigned int i;
4415
4416 for (i = 0; i < devip->nr_zones; i++, zsp++) {
4417 if (zsp->z_cond == ZC4_CLOSED)
4418 zbc_open_zone(devip, &devip->zstate[i], true);
4419 }
4420}
4421
4422static int resp_open_zone(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
4423{
4424 int res = 0;
4425 u64 z_id;
4426 enum sdebug_z_cond zc;
4427 u8 *cmd = scp->cmnd;
4428 struct sdeb_zone_state *zsp;
4429 bool all = cmd[14] & 0x01;
4430 struct sdeb_store_info *sip = devip2sip(devip, false);
4431 rwlock_t *macc_lckp = sip ? &sip->macc_lck : &sdeb_fake_rw_lck;
4432
4433 if (!sdebug_dev_is_zoned(devip)) {
4434 mk_sense_invalid_opcode(scp);
4435 return check_condition_result;
4436 }
4437
4438 write_lock(macc_lckp);
4439
4440 if (all) {
4441 /* Check if all closed zones can be open */
4442 if (devip->max_open &&
4443 devip->nr_exp_open + devip->nr_closed > devip->max_open) {
4444 mk_sense_buffer(scp, DATA_PROTECT, INSUFF_RES_ASC,
4445 INSUFF_ZONE_ASCQ);
4446 res = check_condition_result;
4447 goto fini;
4448 }
4449 /* Open all closed zones */
4450 zbc_open_all(devip);
4451 goto fini;
4452 }
4453
4454 /* Open the specified zone */
4455 z_id = get_unaligned_be64(cmd + 2);
4456 if (z_id >= sdebug_capacity) {
4457 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
4458 res = check_condition_result;
4459 goto fini;
4460 }
4461
4462 zsp = zbc_zone(devip, z_id);
4463 if (z_id != zsp->z_start) {
4464 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
4465 res = check_condition_result;
4466 goto fini;
4467 }
4468 if (zbc_zone_is_conv(zsp)) {
4469 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
4470 res = check_condition_result;
4471 goto fini;
4472 }
4473
4474 zc = zsp->z_cond;
4475 if (zc == ZC3_EXPLICIT_OPEN || zc == ZC5_FULL)
4476 goto fini;
4477
4478 if (devip->max_open && devip->nr_exp_open >= devip->max_open) {
4479 mk_sense_buffer(scp, DATA_PROTECT, INSUFF_RES_ASC,
4480 INSUFF_ZONE_ASCQ);
4481 res = check_condition_result;
4482 goto fini;
4483 }
4484
4485 zbc_open_zone(devip, zsp, true);
4486fini:
4487 write_unlock(macc_lckp);
4488 return res;
4489}
4490
4491static void zbc_close_all(struct sdebug_dev_info *devip)
4492{
4493 unsigned int i;
4494
4495 for (i = 0; i < devip->nr_zones; i++)
4496 zbc_close_zone(devip, &devip->zstate[i]);
4497}
4498
4499static int resp_close_zone(struct scsi_cmnd *scp,
4500 struct sdebug_dev_info *devip)
4501{
4502 int res = 0;
4503 u64 z_id;
4504 u8 *cmd = scp->cmnd;
4505 struct sdeb_zone_state *zsp;
4506 bool all = cmd[14] & 0x01;
4507 struct sdeb_store_info *sip = devip2sip(devip, false);
4508 rwlock_t *macc_lckp = sip ? &sip->macc_lck : &sdeb_fake_rw_lck;
4509
4510 if (!sdebug_dev_is_zoned(devip)) {
4511 mk_sense_invalid_opcode(scp);
4512 return check_condition_result;
4513 }
4514
4515 write_lock(macc_lckp);
4516
4517 if (all) {
4518 zbc_close_all(devip);
4519 goto fini;
4520 }
4521
4522 /* Close specified zone */
4523 z_id = get_unaligned_be64(cmd + 2);
4524 if (z_id >= sdebug_capacity) {
4525 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
4526 res = check_condition_result;
4527 goto fini;
4528 }
4529
4530 zsp = zbc_zone(devip, z_id);
4531 if (z_id != zsp->z_start) {
4532 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
4533 res = check_condition_result;
4534 goto fini;
4535 }
4536 if (zbc_zone_is_conv(zsp)) {
4537 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
4538 res = check_condition_result;
4539 goto fini;
4540 }
4541
4542 zbc_close_zone(devip, zsp);
4543fini:
4544 write_unlock(macc_lckp);
4545 return res;
4546}
4547
4548static void zbc_finish_zone(struct sdebug_dev_info *devip,
4549 struct sdeb_zone_state *zsp, bool empty)
4550{
4551 enum sdebug_z_cond zc = zsp->z_cond;
4552
4553 if (zc == ZC4_CLOSED || zc == ZC2_IMPLICIT_OPEN ||
4554 zc == ZC3_EXPLICIT_OPEN || (empty && zc == ZC1_EMPTY)) {
4555 if (zc == ZC2_IMPLICIT_OPEN || zc == ZC3_EXPLICIT_OPEN)
4556 zbc_close_zone(devip, zsp);
4557 if (zsp->z_cond == ZC4_CLOSED)
4558 devip->nr_closed--;
4559 zsp->z_wp = zsp->z_start + zsp->z_size;
4560 zsp->z_cond = ZC5_FULL;
4561 }
4562}
4563
4564static void zbc_finish_all(struct sdebug_dev_info *devip)
4565{
4566 unsigned int i;
4567
4568 for (i = 0; i < devip->nr_zones; i++)
4569 zbc_finish_zone(devip, &devip->zstate[i], false);
4570}
4571
4572static int resp_finish_zone(struct scsi_cmnd *scp,
4573 struct sdebug_dev_info *devip)
4574{
4575 struct sdeb_zone_state *zsp;
4576 int res = 0;
4577 u64 z_id;
4578 u8 *cmd = scp->cmnd;
4579 bool all = cmd[14] & 0x01;
4580 struct sdeb_store_info *sip = devip2sip(devip, false);
4581 rwlock_t *macc_lckp = sip ? &sip->macc_lck : &sdeb_fake_rw_lck;
4582
4583 if (!sdebug_dev_is_zoned(devip)) {
4584 mk_sense_invalid_opcode(scp);
4585 return check_condition_result;
4586 }
4587
4588 write_lock(macc_lckp);
4589
4590 if (all) {
4591 zbc_finish_all(devip);
4592 goto fini;
4593 }
4594
4595 /* Finish the specified zone */
4596 z_id = get_unaligned_be64(cmd + 2);
4597 if (z_id >= sdebug_capacity) {
4598 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
4599 res = check_condition_result;
4600 goto fini;
4601 }
4602
4603 zsp = zbc_zone(devip, z_id);
4604 if (z_id != zsp->z_start) {
4605 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
4606 res = check_condition_result;
4607 goto fini;
4608 }
4609 if (zbc_zone_is_conv(zsp)) {
4610 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
4611 res = check_condition_result;
4612 goto fini;
4613 }
4614
4615 zbc_finish_zone(devip, zsp, true);
4616fini:
4617 write_unlock(macc_lckp);
4618 return res;
4619}
4620
4621static void zbc_rwp_zone(struct sdebug_dev_info *devip,
4622 struct sdeb_zone_state *zsp)
4623{
4624 enum sdebug_z_cond zc;
4625
4626 if (zbc_zone_is_conv(zsp))
4627 return;
4628
4629 zc = zsp->z_cond;
4630 if (zc == ZC2_IMPLICIT_OPEN || zc == ZC3_EXPLICIT_OPEN)
4631 zbc_close_zone(devip, zsp);
4632
4633 if (zsp->z_cond == ZC4_CLOSED)
4634 devip->nr_closed--;
4635
4636 zsp->z_non_seq_resource = false;
4637 zsp->z_wp = zsp->z_start;
4638 zsp->z_cond = ZC1_EMPTY;
4639}
4640
4641static void zbc_rwp_all(struct sdebug_dev_info *devip)
4642{
4643 unsigned int i;
4644
4645 for (i = 0; i < devip->nr_zones; i++)
4646 zbc_rwp_zone(devip, &devip->zstate[i]);
4647}
4648
4649static int resp_rwp_zone(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
4650{
4651 struct sdeb_zone_state *zsp;
4652 int res = 0;
4653 u64 z_id;
4654 u8 *cmd = scp->cmnd;
4655 bool all = cmd[14] & 0x01;
4656 struct sdeb_store_info *sip = devip2sip(devip, false);
4657 rwlock_t *macc_lckp = sip ? &sip->macc_lck : &sdeb_fake_rw_lck;
4658
4659 if (!sdebug_dev_is_zoned(devip)) {
4660 mk_sense_invalid_opcode(scp);
4661 return check_condition_result;
4662 }
4663
4664 write_lock(macc_lckp);
4665
4666 if (all) {
4667 zbc_rwp_all(devip);
4668 goto fini;
4669 }
4670
4671 z_id = get_unaligned_be64(cmd + 2);
4672 if (z_id >= sdebug_capacity) {
4673 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
4674 res = check_condition_result;
4675 goto fini;
4676 }
4677
4678 zsp = zbc_zone(devip, z_id);
4679 if (z_id != zsp->z_start) {
4680 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
4681 res = check_condition_result;
4682 goto fini;
4683 }
4684 if (zbc_zone_is_conv(zsp)) {
4685 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
4686 res = check_condition_result;
4687 goto fini;
4688 }
4689
4690 zbc_rwp_zone(devip, zsp);
4691fini:
4692 write_unlock(macc_lckp);
4693 return res;
4694}
4695
4696static struct sdebug_queue *get_queue(struct scsi_cmnd *cmnd)
4697{
4698 u16 hwq;
4699
4700 if (sdebug_host_max_queue) {
4701 /* Provide a simple method to choose the hwq */
4702 hwq = smp_processor_id() % submit_queues;
4703 } else {
4704 u32 tag = blk_mq_unique_tag(cmnd->request);
4705
4706 hwq = blk_mq_unique_tag_to_hwq(tag);
4707
4708 pr_debug("tag=%#x, hwq=%d\n", tag, hwq);
4709 if (WARN_ON_ONCE(hwq >= submit_queues))
4710 hwq = 0;
4711 }
4712 return sdebug_q_arr + hwq;
4713}
4714
4715static u32 get_tag(struct scsi_cmnd *cmnd)
4716{
4717 return blk_mq_unique_tag(cmnd->request);
4718}
4719
4720/* Queued (deferred) command completions converge here. */
4721static void sdebug_q_cmd_complete(struct sdebug_defer *sd_dp)
4722{
4723 bool aborted = sd_dp->aborted;
4724 int qc_idx;
4725 int retiring = 0;
4726 unsigned long iflags;
4727 struct sdebug_queue *sqp;
4728 struct sdebug_queued_cmd *sqcp;
4729 struct scsi_cmnd *scp;
4730 struct sdebug_dev_info *devip;
4731
4732 sd_dp->defer_t = SDEB_DEFER_NONE;
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 sqcp = &sqp->qc_arr[qc_idx];
4748 scp = sqcp->a_cmnd;
4749 if (unlikely(scp == NULL)) {
4750 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
4751 pr_err("scp is NULL, sqa_idx=%d, qc_idx=%d, hc_idx=%d\n",
4752 sd_dp->sqa_idx, qc_idx, sd_dp->hc_idx);
4753 return;
4754 }
4755 devip = (struct sdebug_dev_info *)scp->device->hostdata;
4756 if (likely(devip))
4757 atomic_dec(&devip->num_in_q);
4758 else
4759 pr_err("devip=NULL\n");
4760 if (unlikely(atomic_read(&retired_max_queue) > 0))
4761 retiring = 1;
4762
4763 sqcp->a_cmnd = NULL;
4764 if (unlikely(!test_and_clear_bit(qc_idx, sqp->in_use_bm))) {
4765 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
4766 pr_err("Unexpected completion\n");
4767 return;
4768 }
4769
4770 if (unlikely(retiring)) { /* user has reduced max_queue */
4771 int k, retval;
4772
4773 retval = atomic_read(&retired_max_queue);
4774 if (qc_idx >= retval) {
4775 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
4776 pr_err("index %d too large\n", retval);
4777 return;
4778 }
4779 k = find_last_bit(sqp->in_use_bm, retval);
4780 if ((k < sdebug_max_queue) || (k == retval))
4781 atomic_set(&retired_max_queue, 0);
4782 else
4783 atomic_set(&retired_max_queue, k + 1);
4784 }
4785 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
4786 if (unlikely(aborted)) {
4787 if (sdebug_verbose)
4788 pr_info("bypassing scsi_done() due to aborted cmd\n");
4789 return;
4790 }
4791 scp->scsi_done(scp); /* callback to mid level */
4792}
4793
4794/* When high resolution timer goes off this function is called. */
4795static enum hrtimer_restart sdebug_q_cmd_hrt_complete(struct hrtimer *timer)
4796{
4797 struct sdebug_defer *sd_dp = container_of(timer, struct sdebug_defer,
4798 hrt);
4799 sdebug_q_cmd_complete(sd_dp);
4800 return HRTIMER_NORESTART;
4801}
4802
4803/* When work queue schedules work, it calls this function. */
4804static void sdebug_q_cmd_wq_complete(struct work_struct *work)
4805{
4806 struct sdebug_defer *sd_dp = container_of(work, struct sdebug_defer,
4807 ew.work);
4808 sdebug_q_cmd_complete(sd_dp);
4809}
4810
4811static bool got_shared_uuid;
4812static uuid_t shared_uuid;
4813
4814static int sdebug_device_create_zones(struct sdebug_dev_info *devip)
4815{
4816 struct sdeb_zone_state *zsp;
4817 sector_t capacity = get_sdebug_capacity();
4818 sector_t zstart = 0;
4819 unsigned int i;
4820
4821 /*
4822 * Set the zone size: if sdeb_zbc_zone_size_mb is not set, figure out
4823 * a zone size allowing for at least 4 zones on the device. Otherwise,
4824 * use the specified zone size checking that at least 2 zones can be
4825 * created for the device.
4826 */
4827 if (!sdeb_zbc_zone_size_mb) {
4828 devip->zsize = (DEF_ZBC_ZONE_SIZE_MB * SZ_1M)
4829 >> ilog2(sdebug_sector_size);
4830 while (capacity < devip->zsize << 2 && devip->zsize >= 2)
4831 devip->zsize >>= 1;
4832 if (devip->zsize < 2) {
4833 pr_err("Device capacity too small\n");
4834 return -EINVAL;
4835 }
4836 } else {
4837 if (!is_power_of_2(sdeb_zbc_zone_size_mb)) {
4838 pr_err("Zone size is not a power of 2\n");
4839 return -EINVAL;
4840 }
4841 devip->zsize = (sdeb_zbc_zone_size_mb * SZ_1M)
4842 >> ilog2(sdebug_sector_size);
4843 if (devip->zsize >= capacity) {
4844 pr_err("Zone size too large for device capacity\n");
4845 return -EINVAL;
4846 }
4847 }
4848
4849 devip->zsize_shift = ilog2(devip->zsize);
4850 devip->nr_zones = (capacity + devip->zsize - 1) >> devip->zsize_shift;
4851
4852 if (sdeb_zbc_nr_conv >= devip->nr_zones) {
4853 pr_err("Number of conventional zones too large\n");
4854 return -EINVAL;
4855 }
4856 devip->nr_conv_zones = sdeb_zbc_nr_conv;
4857
4858 if (devip->zmodel == BLK_ZONED_HM) {
4859 /* zbc_max_open_zones can be 0, meaning "not reported" */
4860 if (sdeb_zbc_max_open >= devip->nr_zones - 1)
4861 devip->max_open = (devip->nr_zones - 1) / 2;
4862 else
4863 devip->max_open = sdeb_zbc_max_open;
4864 }
4865
4866 devip->zstate = kcalloc(devip->nr_zones,
4867 sizeof(struct sdeb_zone_state), GFP_KERNEL);
4868 if (!devip->zstate)
4869 return -ENOMEM;
4870
4871 for (i = 0; i < devip->nr_zones; i++) {
4872 zsp = &devip->zstate[i];
4873
4874 zsp->z_start = zstart;
4875
4876 if (i < devip->nr_conv_zones) {
4877 zsp->z_type = ZBC_ZONE_TYPE_CNV;
4878 zsp->z_cond = ZBC_NOT_WRITE_POINTER;
4879 zsp->z_wp = (sector_t)-1;
4880 } else {
4881 if (devip->zmodel == BLK_ZONED_HM)
4882 zsp->z_type = ZBC_ZONE_TYPE_SWR;
4883 else
4884 zsp->z_type = ZBC_ZONE_TYPE_SWP;
4885 zsp->z_cond = ZC1_EMPTY;
4886 zsp->z_wp = zsp->z_start;
4887 }
4888
4889 if (zsp->z_start + devip->zsize < capacity)
4890 zsp->z_size = devip->zsize;
4891 else
4892 zsp->z_size = capacity - zsp->z_start;
4893
4894 zstart += zsp->z_size;
4895 }
4896
4897 return 0;
4898}
4899
4900static struct sdebug_dev_info *sdebug_device_create(
4901 struct sdebug_host_info *sdbg_host, gfp_t flags)
4902{
4903 struct sdebug_dev_info *devip;
4904
4905 devip = kzalloc(sizeof(*devip), flags);
4906 if (devip) {
4907 if (sdebug_uuid_ctl == 1)
4908 uuid_gen(&devip->lu_name);
4909 else if (sdebug_uuid_ctl == 2) {
4910 if (got_shared_uuid)
4911 devip->lu_name = shared_uuid;
4912 else {
4913 uuid_gen(&shared_uuid);
4914 got_shared_uuid = true;
4915 devip->lu_name = shared_uuid;
4916 }
4917 }
4918 devip->sdbg_host = sdbg_host;
4919 if (sdeb_zbc_in_use) {
4920 devip->zmodel = sdeb_zbc_model;
4921 if (sdebug_device_create_zones(devip)) {
4922 kfree(devip);
4923 return NULL;
4924 }
4925 } else {
4926 devip->zmodel = BLK_ZONED_NONE;
4927 }
4928 devip->sdbg_host = sdbg_host;
4929 devip->create_ts = ktime_get_boottime();
4930 atomic_set(&devip->stopped, (sdeb_tur_ms_to_ready > 0 ? 2 : 0));
4931 list_add_tail(&devip->dev_list, &sdbg_host->dev_info_list);
4932 }
4933 return devip;
4934}
4935
4936static struct sdebug_dev_info *find_build_dev_info(struct scsi_device *sdev)
4937{
4938 struct sdebug_host_info *sdbg_host;
4939 struct sdebug_dev_info *open_devip = NULL;
4940 struct sdebug_dev_info *devip;
4941
4942 sdbg_host = *(struct sdebug_host_info **)shost_priv(sdev->host);
4943 if (!sdbg_host) {
4944 pr_err("Host info NULL\n");
4945 return NULL;
4946 }
4947 list_for_each_entry(devip, &sdbg_host->dev_info_list, dev_list) {
4948 if ((devip->used) && (devip->channel == sdev->channel) &&
4949 (devip->target == sdev->id) &&
4950 (devip->lun == sdev->lun))
4951 return devip;
4952 else {
4953 if ((!devip->used) && (!open_devip))
4954 open_devip = devip;
4955 }
4956 }
4957 if (!open_devip) { /* try and make a new one */
4958 open_devip = sdebug_device_create(sdbg_host, GFP_ATOMIC);
4959 if (!open_devip) {
4960 pr_err("out of memory at line %d\n", __LINE__);
4961 return NULL;
4962 }
4963 }
4964
4965 open_devip->channel = sdev->channel;
4966 open_devip->target = sdev->id;
4967 open_devip->lun = sdev->lun;
4968 open_devip->sdbg_host = sdbg_host;
4969 atomic_set(&open_devip->num_in_q, 0);
4970 set_bit(SDEBUG_UA_POR, open_devip->uas_bm);
4971 open_devip->used = true;
4972 return open_devip;
4973}
4974
4975static int scsi_debug_slave_alloc(struct scsi_device *sdp)
4976{
4977 if (sdebug_verbose)
4978 pr_info("slave_alloc <%u %u %u %llu>\n",
4979 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
4980 return 0;
4981}
4982
4983static int scsi_debug_slave_configure(struct scsi_device *sdp)
4984{
4985 struct sdebug_dev_info *devip =
4986 (struct sdebug_dev_info *)sdp->hostdata;
4987
4988 if (sdebug_verbose)
4989 pr_info("slave_configure <%u %u %u %llu>\n",
4990 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
4991 if (sdp->host->max_cmd_len != SDEBUG_MAX_CMD_LEN)
4992 sdp->host->max_cmd_len = SDEBUG_MAX_CMD_LEN;
4993 if (devip == NULL) {
4994 devip = find_build_dev_info(sdp);
4995 if (devip == NULL)
4996 return 1; /* no resources, will be marked offline */
4997 }
4998 sdp->hostdata = devip;
4999 if (sdebug_no_uld)
5000 sdp->no_uld_attach = 1;
5001 config_cdb_len(sdp);
5002 return 0;
5003}
5004
5005static void scsi_debug_slave_destroy(struct scsi_device *sdp)
5006{
5007 struct sdebug_dev_info *devip =
5008 (struct sdebug_dev_info *)sdp->hostdata;
5009
5010 if (sdebug_verbose)
5011 pr_info("slave_destroy <%u %u %u %llu>\n",
5012 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
5013 if (devip) {
5014 /* make this slot available for re-use */
5015 devip->used = false;
5016 sdp->hostdata = NULL;
5017 }
5018}
5019
5020static void stop_qc_helper(struct sdebug_defer *sd_dp,
5021 enum sdeb_defer_type defer_t)
5022{
5023 if (!sd_dp)
5024 return;
5025 if (defer_t == SDEB_DEFER_HRT)
5026 hrtimer_cancel(&sd_dp->hrt);
5027 else if (defer_t == SDEB_DEFER_WQ)
5028 cancel_work_sync(&sd_dp->ew.work);
5029}
5030
5031/* If @cmnd found deletes its timer or work queue and returns true; else
5032 returns false */
5033static bool stop_queued_cmnd(struct scsi_cmnd *cmnd)
5034{
5035 unsigned long iflags;
5036 int j, k, qmax, r_qmax;
5037 enum sdeb_defer_type l_defer_t;
5038 struct sdebug_queue *sqp;
5039 struct sdebug_queued_cmd *sqcp;
5040 struct sdebug_dev_info *devip;
5041 struct sdebug_defer *sd_dp;
5042
5043 for (j = 0, sqp = sdebug_q_arr; j < submit_queues; ++j, ++sqp) {
5044 spin_lock_irqsave(&sqp->qc_lock, iflags);
5045 qmax = sdebug_max_queue;
5046 r_qmax = atomic_read(&retired_max_queue);
5047 if (r_qmax > qmax)
5048 qmax = r_qmax;
5049 for (k = 0; k < qmax; ++k) {
5050 if (test_bit(k, sqp->in_use_bm)) {
5051 sqcp = &sqp->qc_arr[k];
5052 if (cmnd != sqcp->a_cmnd)
5053 continue;
5054 /* found */
5055 devip = (struct sdebug_dev_info *)
5056 cmnd->device->hostdata;
5057 if (devip)
5058 atomic_dec(&devip->num_in_q);
5059 sqcp->a_cmnd = NULL;
5060 sd_dp = sqcp->sd_dp;
5061 if (sd_dp) {
5062 l_defer_t = sd_dp->defer_t;
5063 sd_dp->defer_t = SDEB_DEFER_NONE;
5064 } else
5065 l_defer_t = SDEB_DEFER_NONE;
5066 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
5067 stop_qc_helper(sd_dp, l_defer_t);
5068 clear_bit(k, sqp->in_use_bm);
5069 return true;
5070 }
5071 }
5072 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
5073 }
5074 return false;
5075}
5076
5077/* Deletes (stops) timers or work queues of all queued commands */
5078static void stop_all_queued(void)
5079{
5080 unsigned long iflags;
5081 int j, k;
5082 enum sdeb_defer_type l_defer_t;
5083 struct sdebug_queue *sqp;
5084 struct sdebug_queued_cmd *sqcp;
5085 struct sdebug_dev_info *devip;
5086 struct sdebug_defer *sd_dp;
5087
5088 for (j = 0, sqp = sdebug_q_arr; j < submit_queues; ++j, ++sqp) {
5089 spin_lock_irqsave(&sqp->qc_lock, iflags);
5090 for (k = 0; k < SDEBUG_CANQUEUE; ++k) {
5091 if (test_bit(k, sqp->in_use_bm)) {
5092 sqcp = &sqp->qc_arr[k];
5093 if (sqcp->a_cmnd == NULL)
5094 continue;
5095 devip = (struct sdebug_dev_info *)
5096 sqcp->a_cmnd->device->hostdata;
5097 if (devip)
5098 atomic_dec(&devip->num_in_q);
5099 sqcp->a_cmnd = NULL;
5100 sd_dp = sqcp->sd_dp;
5101 if (sd_dp) {
5102 l_defer_t = sd_dp->defer_t;
5103 sd_dp->defer_t = SDEB_DEFER_NONE;
5104 } else
5105 l_defer_t = SDEB_DEFER_NONE;
5106 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
5107 stop_qc_helper(sd_dp, l_defer_t);
5108 clear_bit(k, sqp->in_use_bm);
5109 spin_lock_irqsave(&sqp->qc_lock, iflags);
5110 }
5111 }
5112 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
5113 }
5114}
5115
5116/* Free queued command memory on heap */
5117static void free_all_queued(void)
5118{
5119 int j, k;
5120 struct sdebug_queue *sqp;
5121 struct sdebug_queued_cmd *sqcp;
5122
5123 for (j = 0, sqp = sdebug_q_arr; j < submit_queues; ++j, ++sqp) {
5124 for (k = 0; k < SDEBUG_CANQUEUE; ++k) {
5125 sqcp = &sqp->qc_arr[k];
5126 kfree(sqcp->sd_dp);
5127 sqcp->sd_dp = NULL;
5128 }
5129 }
5130}
5131
5132static int scsi_debug_abort(struct scsi_cmnd *SCpnt)
5133{
5134 bool ok;
5135
5136 ++num_aborts;
5137 if (SCpnt) {
5138 ok = stop_queued_cmnd(SCpnt);
5139 if (SCpnt->device && (SDEBUG_OPT_ALL_NOISE & sdebug_opts))
5140 sdev_printk(KERN_INFO, SCpnt->device,
5141 "%s: command%s found\n", __func__,
5142 ok ? "" : " not");
5143 }
5144 return SUCCESS;
5145}
5146
5147static int scsi_debug_device_reset(struct scsi_cmnd *SCpnt)
5148{
5149 ++num_dev_resets;
5150 if (SCpnt && SCpnt->device) {
5151 struct scsi_device *sdp = SCpnt->device;
5152 struct sdebug_dev_info *devip =
5153 (struct sdebug_dev_info *)sdp->hostdata;
5154
5155 if (SDEBUG_OPT_ALL_NOISE & sdebug_opts)
5156 sdev_printk(KERN_INFO, sdp, "%s\n", __func__);
5157 if (devip)
5158 set_bit(SDEBUG_UA_POR, devip->uas_bm);
5159 }
5160 return SUCCESS;
5161}
5162
5163static int scsi_debug_target_reset(struct scsi_cmnd *SCpnt)
5164{
5165 struct sdebug_host_info *sdbg_host;
5166 struct sdebug_dev_info *devip;
5167 struct scsi_device *sdp;
5168 struct Scsi_Host *hp;
5169 int k = 0;
5170
5171 ++num_target_resets;
5172 if (!SCpnt)
5173 goto lie;
5174 sdp = SCpnt->device;
5175 if (!sdp)
5176 goto lie;
5177 if (SDEBUG_OPT_ALL_NOISE & sdebug_opts)
5178 sdev_printk(KERN_INFO, sdp, "%s\n", __func__);
5179 hp = sdp->host;
5180 if (!hp)
5181 goto lie;
5182 sdbg_host = *(struct sdebug_host_info **)shost_priv(hp);
5183 if (sdbg_host) {
5184 list_for_each_entry(devip,
5185 &sdbg_host->dev_info_list,
5186 dev_list)
5187 if (devip->target == sdp->id) {
5188 set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm);
5189 ++k;
5190 }
5191 }
5192 if (SDEBUG_OPT_RESET_NOISE & sdebug_opts)
5193 sdev_printk(KERN_INFO, sdp,
5194 "%s: %d device(s) found in target\n", __func__, k);
5195lie:
5196 return SUCCESS;
5197}
5198
5199static int scsi_debug_bus_reset(struct scsi_cmnd *SCpnt)
5200{
5201 struct sdebug_host_info *sdbg_host;
5202 struct sdebug_dev_info *devip;
5203 struct scsi_device *sdp;
5204 struct Scsi_Host *hp;
5205 int k = 0;
5206
5207 ++num_bus_resets;
5208 if (!(SCpnt && SCpnt->device))
5209 goto lie;
5210 sdp = SCpnt->device;
5211 if (SDEBUG_OPT_ALL_NOISE & sdebug_opts)
5212 sdev_printk(KERN_INFO, sdp, "%s\n", __func__);
5213 hp = sdp->host;
5214 if (hp) {
5215 sdbg_host = *(struct sdebug_host_info **)shost_priv(hp);
5216 if (sdbg_host) {
5217 list_for_each_entry(devip,
5218 &sdbg_host->dev_info_list,
5219 dev_list) {
5220 set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm);
5221 ++k;
5222 }
5223 }
5224 }
5225 if (SDEBUG_OPT_RESET_NOISE & sdebug_opts)
5226 sdev_printk(KERN_INFO, sdp,
5227 "%s: %d device(s) found in host\n", __func__, k);
5228lie:
5229 return SUCCESS;
5230}
5231
5232static int scsi_debug_host_reset(struct scsi_cmnd *SCpnt)
5233{
5234 struct sdebug_host_info *sdbg_host;
5235 struct sdebug_dev_info *devip;
5236 int k = 0;
5237
5238 ++num_host_resets;
5239 if ((SCpnt->device) && (SDEBUG_OPT_ALL_NOISE & sdebug_opts))
5240 sdev_printk(KERN_INFO, SCpnt->device, "%s\n", __func__);
5241 spin_lock(&sdebug_host_list_lock);
5242 list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) {
5243 list_for_each_entry(devip, &sdbg_host->dev_info_list,
5244 dev_list) {
5245 set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm);
5246 ++k;
5247 }
5248 }
5249 spin_unlock(&sdebug_host_list_lock);
5250 stop_all_queued();
5251 if (SDEBUG_OPT_RESET_NOISE & sdebug_opts)
5252 sdev_printk(KERN_INFO, SCpnt->device,
5253 "%s: %d device(s) found\n", __func__, k);
5254 return SUCCESS;
5255}
5256
5257static void sdebug_build_parts(unsigned char *ramp, unsigned long store_size)
5258{
5259 struct msdos_partition *pp;
5260 int starts[SDEBUG_MAX_PARTS + 2];
5261 int sectors_per_part, num_sectors, k;
5262 int heads_by_sects, start_sec, end_sec;
5263
5264 /* assume partition table already zeroed */
5265 if ((sdebug_num_parts < 1) || (store_size < 1048576))
5266 return;
5267 if (sdebug_num_parts > SDEBUG_MAX_PARTS) {
5268 sdebug_num_parts = SDEBUG_MAX_PARTS;
5269 pr_warn("reducing partitions to %d\n", SDEBUG_MAX_PARTS);
5270 }
5271 num_sectors = (int)sdebug_store_sectors;
5272 sectors_per_part = (num_sectors - sdebug_sectors_per)
5273 / sdebug_num_parts;
5274 heads_by_sects = sdebug_heads * sdebug_sectors_per;
5275 starts[0] = sdebug_sectors_per;
5276 for (k = 1; k < sdebug_num_parts; ++k)
5277 starts[k] = ((k * sectors_per_part) / heads_by_sects)
5278 * heads_by_sects;
5279 starts[sdebug_num_parts] = num_sectors;
5280 starts[sdebug_num_parts + 1] = 0;
5281
5282 ramp[510] = 0x55; /* magic partition markings */
5283 ramp[511] = 0xAA;
5284 pp = (struct msdos_partition *)(ramp + 0x1be);
5285 for (k = 0; starts[k + 1]; ++k, ++pp) {
5286 start_sec = starts[k];
5287 end_sec = starts[k + 1] - 1;
5288 pp->boot_ind = 0;
5289
5290 pp->cyl = start_sec / heads_by_sects;
5291 pp->head = (start_sec - (pp->cyl * heads_by_sects))
5292 / sdebug_sectors_per;
5293 pp->sector = (start_sec % sdebug_sectors_per) + 1;
5294
5295 pp->end_cyl = end_sec / heads_by_sects;
5296 pp->end_head = (end_sec - (pp->end_cyl * heads_by_sects))
5297 / sdebug_sectors_per;
5298 pp->end_sector = (end_sec % sdebug_sectors_per) + 1;
5299
5300 pp->start_sect = cpu_to_le32(start_sec);
5301 pp->nr_sects = cpu_to_le32(end_sec - start_sec + 1);
5302 pp->sys_ind = 0x83; /* plain Linux partition */
5303 }
5304}
5305
5306static void block_unblock_all_queues(bool block)
5307{
5308 int j;
5309 struct sdebug_queue *sqp;
5310
5311 for (j = 0, sqp = sdebug_q_arr; j < submit_queues; ++j, ++sqp)
5312 atomic_set(&sqp->blocked, (int)block);
5313}
5314
5315/* Adjust (by rounding down) the sdebug_cmnd_count so abs(every_nth)-1
5316 * commands will be processed normally before triggers occur.
5317 */
5318static void tweak_cmnd_count(void)
5319{
5320 int count, modulo;
5321
5322 modulo = abs(sdebug_every_nth);
5323 if (modulo < 2)
5324 return;
5325 block_unblock_all_queues(true);
5326 count = atomic_read(&sdebug_cmnd_count);
5327 atomic_set(&sdebug_cmnd_count, (count / modulo) * modulo);
5328 block_unblock_all_queues(false);
5329}
5330
5331static void clear_queue_stats(void)
5332{
5333 atomic_set(&sdebug_cmnd_count, 0);
5334 atomic_set(&sdebug_completions, 0);
5335 atomic_set(&sdebug_miss_cpus, 0);
5336 atomic_set(&sdebug_a_tsf, 0);
5337}
5338
5339static bool inject_on_this_cmd(void)
5340{
5341 if (sdebug_every_nth == 0)
5342 return false;
5343 return (atomic_read(&sdebug_cmnd_count) % abs(sdebug_every_nth)) == 0;
5344}
5345
5346#define INCLUSIVE_TIMING_MAX_NS 1000000 /* 1 millisecond */
5347
5348/* Complete the processing of the thread that queued a SCSI command to this
5349 * driver. It either completes the command by calling cmnd_done() or
5350 * schedules a hr timer or work queue then returns 0. Returns
5351 * SCSI_MLQUEUE_HOST_BUSY if temporarily out of resources.
5352 */
5353static int schedule_resp(struct scsi_cmnd *cmnd, struct sdebug_dev_info *devip,
5354 int scsi_result,
5355 int (*pfp)(struct scsi_cmnd *,
5356 struct sdebug_dev_info *),
5357 int delta_jiff, int ndelay)
5358{
5359 bool new_sd_dp;
5360 bool inject = false;
5361 int k, num_in_q, qdepth;
5362 unsigned long iflags;
5363 u64 ns_from_boot = 0;
5364 struct sdebug_queue *sqp;
5365 struct sdebug_queued_cmd *sqcp;
5366 struct scsi_device *sdp;
5367 struct sdebug_defer *sd_dp;
5368
5369 if (unlikely(devip == NULL)) {
5370 if (scsi_result == 0)
5371 scsi_result = DID_NO_CONNECT << 16;
5372 goto respond_in_thread;
5373 }
5374 sdp = cmnd->device;
5375
5376 if (delta_jiff == 0)
5377 goto respond_in_thread;
5378
5379 sqp = get_queue(cmnd);
5380 spin_lock_irqsave(&sqp->qc_lock, iflags);
5381 if (unlikely(atomic_read(&sqp->blocked))) {
5382 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
5383 return SCSI_MLQUEUE_HOST_BUSY;
5384 }
5385 num_in_q = atomic_read(&devip->num_in_q);
5386 qdepth = cmnd->device->queue_depth;
5387 if (unlikely((qdepth > 0) && (num_in_q >= qdepth))) {
5388 if (scsi_result) {
5389 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
5390 goto respond_in_thread;
5391 } else
5392 scsi_result = device_qfull_result;
5393 } else if (unlikely(sdebug_every_nth &&
5394 (SDEBUG_OPT_RARE_TSF & sdebug_opts) &&
5395 (scsi_result == 0))) {
5396 if ((num_in_q == (qdepth - 1)) &&
5397 (atomic_inc_return(&sdebug_a_tsf) >=
5398 abs(sdebug_every_nth))) {
5399 atomic_set(&sdebug_a_tsf, 0);
5400 inject = true;
5401 scsi_result = device_qfull_result;
5402 }
5403 }
5404
5405 k = find_first_zero_bit(sqp->in_use_bm, sdebug_max_queue);
5406 if (unlikely(k >= sdebug_max_queue)) {
5407 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
5408 if (scsi_result)
5409 goto respond_in_thread;
5410 else if (SDEBUG_OPT_ALL_TSF & sdebug_opts)
5411 scsi_result = device_qfull_result;
5412 if (SDEBUG_OPT_Q_NOISE & sdebug_opts)
5413 sdev_printk(KERN_INFO, sdp,
5414 "%s: max_queue=%d exceeded, %s\n",
5415 __func__, sdebug_max_queue,
5416 (scsi_result ? "status: TASK SET FULL" :
5417 "report: host busy"));
5418 if (scsi_result)
5419 goto respond_in_thread;
5420 else
5421 return SCSI_MLQUEUE_HOST_BUSY;
5422 }
5423 set_bit(k, sqp->in_use_bm);
5424 atomic_inc(&devip->num_in_q);
5425 sqcp = &sqp->qc_arr[k];
5426 sqcp->a_cmnd = cmnd;
5427 cmnd->host_scribble = (unsigned char *)sqcp;
5428 sd_dp = sqcp->sd_dp;
5429 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
5430 if (!sd_dp) {
5431 sd_dp = kzalloc(sizeof(*sd_dp), GFP_ATOMIC);
5432 if (!sd_dp) {
5433 atomic_dec(&devip->num_in_q);
5434 clear_bit(k, sqp->in_use_bm);
5435 return SCSI_MLQUEUE_HOST_BUSY;
5436 }
5437 new_sd_dp = true;
5438 } else {
5439 new_sd_dp = false;
5440 }
5441
5442 /* Set the hostwide tag */
5443 if (sdebug_host_max_queue)
5444 sd_dp->hc_idx = get_tag(cmnd);
5445
5446 if (ndelay > 0 && ndelay < INCLUSIVE_TIMING_MAX_NS)
5447 ns_from_boot = ktime_get_boottime_ns();
5448
5449 /* one of the resp_*() response functions is called here */
5450 cmnd->result = pfp ? pfp(cmnd, devip) : 0;
5451 if (cmnd->result & SDEG_RES_IMMED_MASK) {
5452 cmnd->result &= ~SDEG_RES_IMMED_MASK;
5453 delta_jiff = ndelay = 0;
5454 }
5455 if (cmnd->result == 0 && scsi_result != 0)
5456 cmnd->result = scsi_result;
5457 if (cmnd->result == 0 && unlikely(sdebug_opts & SDEBUG_OPT_TRANSPORT_ERR)) {
5458 if (atomic_read(&sdeb_inject_pending)) {
5459 mk_sense_buffer(cmnd, ABORTED_COMMAND, TRANSPORT_PROBLEM, ACK_NAK_TO);
5460 atomic_set(&sdeb_inject_pending, 0);
5461 cmnd->result = check_condition_result;
5462 }
5463 }
5464
5465 if (unlikely(sdebug_verbose && cmnd->result))
5466 sdev_printk(KERN_INFO, sdp, "%s: non-zero result=0x%x\n",
5467 __func__, cmnd->result);
5468
5469 if (delta_jiff > 0 || ndelay > 0) {
5470 ktime_t kt;
5471
5472 if (delta_jiff > 0) {
5473 u64 ns = jiffies_to_nsecs(delta_jiff);
5474
5475 if (sdebug_random && ns < U32_MAX) {
5476 ns = prandom_u32_max((u32)ns);
5477 } else if (sdebug_random) {
5478 ns >>= 12; /* scale to 4 usec precision */
5479 if (ns < U32_MAX) /* over 4 hours max */
5480 ns = prandom_u32_max((u32)ns);
5481 ns <<= 12;
5482 }
5483 kt = ns_to_ktime(ns);
5484 } else { /* ndelay has a 4.2 second max */
5485 kt = sdebug_random ? prandom_u32_max((u32)ndelay) :
5486 (u32)ndelay;
5487 if (ndelay < INCLUSIVE_TIMING_MAX_NS) {
5488 u64 d = ktime_get_boottime_ns() - ns_from_boot;
5489
5490 if (kt <= d) { /* elapsed duration >= kt */
5491 spin_lock_irqsave(&sqp->qc_lock, iflags);
5492 sqcp->a_cmnd = NULL;
5493 atomic_dec(&devip->num_in_q);
5494 clear_bit(k, sqp->in_use_bm);
5495 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
5496 if (new_sd_dp)
5497 kfree(sd_dp);
5498 /* call scsi_done() from this thread */
5499 cmnd->scsi_done(cmnd);
5500 return 0;
5501 }
5502 /* otherwise reduce kt by elapsed time */
5503 kt -= d;
5504 }
5505 }
5506 if (!sd_dp->init_hrt) {
5507 sd_dp->init_hrt = true;
5508 sqcp->sd_dp = sd_dp;
5509 hrtimer_init(&sd_dp->hrt, CLOCK_MONOTONIC,
5510 HRTIMER_MODE_REL_PINNED);
5511 sd_dp->hrt.function = sdebug_q_cmd_hrt_complete;
5512 sd_dp->sqa_idx = sqp - sdebug_q_arr;
5513 sd_dp->qc_idx = k;
5514 }
5515 if (sdebug_statistics)
5516 sd_dp->issuing_cpu = raw_smp_processor_id();
5517 sd_dp->defer_t = SDEB_DEFER_HRT;
5518 /* schedule the invocation of scsi_done() for a later time */
5519 hrtimer_start(&sd_dp->hrt, kt, HRTIMER_MODE_REL_PINNED);
5520 } else { /* jdelay < 0, use work queue */
5521 if (!sd_dp->init_wq) {
5522 sd_dp->init_wq = true;
5523 sqcp->sd_dp = sd_dp;
5524 sd_dp->sqa_idx = sqp - sdebug_q_arr;
5525 sd_dp->qc_idx = k;
5526 INIT_WORK(&sd_dp->ew.work, sdebug_q_cmd_wq_complete);
5527 }
5528 if (sdebug_statistics)
5529 sd_dp->issuing_cpu = raw_smp_processor_id();
5530 sd_dp->defer_t = SDEB_DEFER_WQ;
5531 if (unlikely((sdebug_opts & SDEBUG_OPT_CMD_ABORT) &&
5532 atomic_read(&sdeb_inject_pending)))
5533 sd_dp->aborted = true;
5534 schedule_work(&sd_dp->ew.work);
5535 if (unlikely((sdebug_opts & SDEBUG_OPT_CMD_ABORT) &&
5536 atomic_read(&sdeb_inject_pending))) {
5537 sdev_printk(KERN_INFO, sdp, "abort request tag %d\n", cmnd->request->tag);
5538 blk_abort_request(cmnd->request);
5539 atomic_set(&sdeb_inject_pending, 0);
5540 }
5541 }
5542 if (unlikely((SDEBUG_OPT_Q_NOISE & sdebug_opts) && scsi_result == device_qfull_result))
5543 sdev_printk(KERN_INFO, sdp, "%s: num_in_q=%d +1, %s%s\n", __func__,
5544 num_in_q, (inject ? "<inject> " : ""), "status: TASK SET FULL");
5545 return 0;
5546
5547respond_in_thread: /* call back to mid-layer using invocation thread */
5548 cmnd->result = pfp != NULL ? pfp(cmnd, devip) : 0;
5549 cmnd->result &= ~SDEG_RES_IMMED_MASK;
5550 if (cmnd->result == 0 && scsi_result != 0)
5551 cmnd->result = scsi_result;
5552 cmnd->scsi_done(cmnd);
5553 return 0;
5554}
5555
5556/* Note: The following macros create attribute files in the
5557 /sys/module/scsi_debug/parameters directory. Unfortunately this
5558 driver is unaware of a change and cannot trigger auxiliary actions
5559 as it can when the corresponding attribute in the
5560 /sys/bus/pseudo/drivers/scsi_debug directory is changed.
5561 */
5562module_param_named(add_host, sdebug_add_host, int, S_IRUGO | S_IWUSR);
5563module_param_named(ato, sdebug_ato, int, S_IRUGO);
5564module_param_named(cdb_len, sdebug_cdb_len, int, 0644);
5565module_param_named(clustering, sdebug_clustering, bool, S_IRUGO | S_IWUSR);
5566module_param_named(delay, sdebug_jdelay, int, S_IRUGO | S_IWUSR);
5567module_param_named(dev_size_mb, sdebug_dev_size_mb, int, S_IRUGO);
5568module_param_named(dif, sdebug_dif, int, S_IRUGO);
5569module_param_named(dix, sdebug_dix, int, S_IRUGO);
5570module_param_named(dsense, sdebug_dsense, int, S_IRUGO | S_IWUSR);
5571module_param_named(every_nth, sdebug_every_nth, int, S_IRUGO | S_IWUSR);
5572module_param_named(fake_rw, sdebug_fake_rw, int, S_IRUGO | S_IWUSR);
5573module_param_named(guard, sdebug_guard, uint, S_IRUGO);
5574module_param_named(host_lock, sdebug_host_lock, bool, S_IRUGO | S_IWUSR);
5575module_param_named(host_max_queue, sdebug_host_max_queue, int, S_IRUGO);
5576module_param_string(inq_product, sdebug_inq_product_id,
5577 sizeof(sdebug_inq_product_id), S_IRUGO | S_IWUSR);
5578module_param_string(inq_rev, sdebug_inq_product_rev,
5579 sizeof(sdebug_inq_product_rev), S_IRUGO | S_IWUSR);
5580module_param_string(inq_vendor, sdebug_inq_vendor_id,
5581 sizeof(sdebug_inq_vendor_id), S_IRUGO | S_IWUSR);
5582module_param_named(lbprz, sdebug_lbprz, int, S_IRUGO);
5583module_param_named(lbpu, sdebug_lbpu, int, S_IRUGO);
5584module_param_named(lbpws, sdebug_lbpws, int, S_IRUGO);
5585module_param_named(lbpws10, sdebug_lbpws10, int, S_IRUGO);
5586module_param_named(lowest_aligned, sdebug_lowest_aligned, int, S_IRUGO);
5587module_param_named(max_luns, sdebug_max_luns, int, S_IRUGO | S_IWUSR);
5588module_param_named(max_queue, sdebug_max_queue, int, S_IRUGO | S_IWUSR);
5589module_param_named(medium_error_count, sdebug_medium_error_count, int,
5590 S_IRUGO | S_IWUSR);
5591module_param_named(medium_error_start, sdebug_medium_error_start, int,
5592 S_IRUGO | S_IWUSR);
5593module_param_named(ndelay, sdebug_ndelay, int, S_IRUGO | S_IWUSR);
5594module_param_named(no_lun_0, sdebug_no_lun_0, int, S_IRUGO | S_IWUSR);
5595module_param_named(no_uld, sdebug_no_uld, int, S_IRUGO);
5596module_param_named(num_parts, sdebug_num_parts, int, S_IRUGO);
5597module_param_named(num_tgts, sdebug_num_tgts, int, S_IRUGO | S_IWUSR);
5598module_param_named(opt_blks, sdebug_opt_blks, int, S_IRUGO);
5599module_param_named(opt_xferlen_exp, sdebug_opt_xferlen_exp, int, S_IRUGO);
5600module_param_named(opts, sdebug_opts, int, S_IRUGO | S_IWUSR);
5601module_param_named(per_host_store, sdebug_per_host_store, bool,
5602 S_IRUGO | S_IWUSR);
5603module_param_named(physblk_exp, sdebug_physblk_exp, int, S_IRUGO);
5604module_param_named(ptype, sdebug_ptype, int, S_IRUGO | S_IWUSR);
5605module_param_named(random, sdebug_random, bool, S_IRUGO | S_IWUSR);
5606module_param_named(removable, sdebug_removable, bool, S_IRUGO | S_IWUSR);
5607module_param_named(scsi_level, sdebug_scsi_level, int, S_IRUGO);
5608module_param_named(sector_size, sdebug_sector_size, int, S_IRUGO);
5609module_param_named(statistics, sdebug_statistics, bool, S_IRUGO | S_IWUSR);
5610module_param_named(strict, sdebug_strict, bool, S_IRUGO | S_IWUSR);
5611module_param_named(submit_queues, submit_queues, int, S_IRUGO);
5612module_param_named(tur_ms_to_ready, sdeb_tur_ms_to_ready, int, S_IRUGO);
5613module_param_named(unmap_alignment, sdebug_unmap_alignment, int, S_IRUGO);
5614module_param_named(unmap_granularity, sdebug_unmap_granularity, int, S_IRUGO);
5615module_param_named(unmap_max_blocks, sdebug_unmap_max_blocks, int, S_IRUGO);
5616module_param_named(unmap_max_desc, sdebug_unmap_max_desc, int, S_IRUGO);
5617module_param_named(uuid_ctl, sdebug_uuid_ctl, int, S_IRUGO);
5618module_param_named(virtual_gb, sdebug_virtual_gb, int, S_IRUGO | S_IWUSR);
5619module_param_named(vpd_use_hostno, sdebug_vpd_use_hostno, int,
5620 S_IRUGO | S_IWUSR);
5621module_param_named(wp, sdebug_wp, bool, S_IRUGO | S_IWUSR);
5622module_param_named(write_same_length, sdebug_write_same_length, int,
5623 S_IRUGO | S_IWUSR);
5624module_param_named(zbc, sdeb_zbc_model_s, charp, S_IRUGO);
5625module_param_named(zone_max_open, sdeb_zbc_max_open, int, S_IRUGO);
5626module_param_named(zone_nr_conv, sdeb_zbc_nr_conv, int, S_IRUGO);
5627module_param_named(zone_size_mb, sdeb_zbc_zone_size_mb, int, S_IRUGO);
5628
5629MODULE_AUTHOR("Eric Youngdale + Douglas Gilbert");
5630MODULE_DESCRIPTION("SCSI debug adapter driver");
5631MODULE_LICENSE("GPL");
5632MODULE_VERSION(SDEBUG_VERSION);
5633
5634MODULE_PARM_DESC(add_host, "add n hosts, in sysfs if negative remove host(s) (def=1)");
5635MODULE_PARM_DESC(ato, "application tag ownership: 0=disk 1=host (def=1)");
5636MODULE_PARM_DESC(cdb_len, "suggest CDB lengths to drivers (def=10)");
5637MODULE_PARM_DESC(clustering, "when set enables larger transfers (def=0)");
5638MODULE_PARM_DESC(delay, "response delay (def=1 jiffy); 0:imm, -1,-2:tiny");
5639MODULE_PARM_DESC(dev_size_mb, "size in MiB of ram shared by devs(def=8)");
5640MODULE_PARM_DESC(dif, "data integrity field type: 0-3 (def=0)");
5641MODULE_PARM_DESC(dix, "data integrity extensions mask (def=0)");
5642MODULE_PARM_DESC(dsense, "use descriptor sense format(def=0 -> fixed)");
5643MODULE_PARM_DESC(every_nth, "timeout every nth command(def=0)");
5644MODULE_PARM_DESC(fake_rw, "fake reads/writes instead of copying (def=0)");
5645MODULE_PARM_DESC(guard, "protection checksum: 0=crc, 1=ip (def=0)");
5646MODULE_PARM_DESC(host_lock, "host_lock is ignored (def=0)");
5647MODULE_PARM_DESC(host_max_queue,
5648 "host max # of queued cmds (0 to max(def) [max_queue fixed equal for !0])");
5649MODULE_PARM_DESC(inq_product, "SCSI INQUIRY product string (def=\"scsi_debug\")");
5650MODULE_PARM_DESC(inq_rev, "SCSI INQUIRY revision string (def=\""
5651 SDEBUG_VERSION "\")");
5652MODULE_PARM_DESC(inq_vendor, "SCSI INQUIRY vendor string (def=\"Linux\")");
5653MODULE_PARM_DESC(lbprz,
5654 "on read unmapped LBs return 0 when 1 (def), return 0xff when 2");
5655MODULE_PARM_DESC(lbpu, "enable LBP, support UNMAP command (def=0)");
5656MODULE_PARM_DESC(lbpws, "enable LBP, support WRITE SAME(16) with UNMAP bit (def=0)");
5657MODULE_PARM_DESC(lbpws10, "enable LBP, support WRITE SAME(10) with UNMAP bit (def=0)");
5658MODULE_PARM_DESC(lowest_aligned, "lowest aligned lba (def=0)");
5659MODULE_PARM_DESC(max_luns, "number of LUNs per target to simulate(def=1)");
5660MODULE_PARM_DESC(max_queue, "max number of queued commands (1 to max(def))");
5661MODULE_PARM_DESC(medium_error_count, "count of sectors to return follow on MEDIUM error");
5662MODULE_PARM_DESC(medium_error_start, "starting sector number to return MEDIUM error");
5663MODULE_PARM_DESC(ndelay, "response delay in nanoseconds (def=0 -> ignore)");
5664MODULE_PARM_DESC(no_lun_0, "no LU number 0 (def=0 -> have lun 0)");
5665MODULE_PARM_DESC(no_uld, "stop ULD (e.g. sd driver) attaching (def=0))");
5666MODULE_PARM_DESC(num_parts, "number of partitions(def=0)");
5667MODULE_PARM_DESC(num_tgts, "number of targets per host to simulate(def=1)");
5668MODULE_PARM_DESC(opt_blks, "optimal transfer length in blocks (def=1024)");
5669MODULE_PARM_DESC(opt_xferlen_exp, "optimal transfer length granularity exponent (def=physblk_exp)");
5670MODULE_PARM_DESC(opts, "1->noise, 2->medium_err, 4->timeout, 8->recovered_err... (def=0)");
5671MODULE_PARM_DESC(per_host_store, "If set, next positive add_host will get new store (def=0)");
5672MODULE_PARM_DESC(physblk_exp, "physical block exponent (def=0)");
5673MODULE_PARM_DESC(ptype, "SCSI peripheral type(def=0[disk])");
5674MODULE_PARM_DESC(random, "If set, uniformly randomize command duration between 0 and delay_in_ns");
5675MODULE_PARM_DESC(removable, "claim to have removable media (def=0)");
5676MODULE_PARM_DESC(scsi_level, "SCSI level to simulate(def=7[SPC-5])");
5677MODULE_PARM_DESC(sector_size, "logical block size in bytes (def=512)");
5678MODULE_PARM_DESC(statistics, "collect statistics on commands, queues (def=0)");
5679MODULE_PARM_DESC(strict, "stricter checks: reserved field in cdb (def=0)");
5680MODULE_PARM_DESC(submit_queues, "support for block multi-queue (def=1)");
5681MODULE_PARM_DESC(tur_ms_to_ready, "TEST UNIT READY millisecs before initial good status (def=0)");
5682MODULE_PARM_DESC(unmap_alignment, "lowest aligned thin provisioning lba (def=0)");
5683MODULE_PARM_DESC(unmap_granularity, "thin provisioning granularity in blocks (def=1)");
5684MODULE_PARM_DESC(unmap_max_blocks, "max # of blocks can be unmapped in one cmd (def=0xffffffff)");
5685MODULE_PARM_DESC(unmap_max_desc, "max # of ranges that can be unmapped in one cmd (def=256)");
5686MODULE_PARM_DESC(uuid_ctl,
5687 "1->use uuid for lu name, 0->don't, 2->all use same (def=0)");
5688MODULE_PARM_DESC(virtual_gb, "virtual gigabyte (GiB) size (def=0 -> use dev_size_mb)");
5689MODULE_PARM_DESC(vpd_use_hostno, "0 -> dev ids ignore hostno (def=1 -> unique dev ids)");
5690MODULE_PARM_DESC(wp, "Write Protect (def=0)");
5691MODULE_PARM_DESC(write_same_length, "Maximum blocks per WRITE SAME cmd (def=0xffff)");
5692MODULE_PARM_DESC(zbc, "'none' [0]; 'aware' [1]; 'managed' [2] (def=0). Can have 'host-' prefix");
5693MODULE_PARM_DESC(zone_max_open, "Maximum number of open zones; [0] for no limit (def=auto)");
5694MODULE_PARM_DESC(zone_nr_conv, "Number of conventional zones (def=1)");
5695MODULE_PARM_DESC(zone_size_mb, "Zone size in MiB (def=auto)");
5696
5697#define SDEBUG_INFO_LEN 256
5698static char sdebug_info[SDEBUG_INFO_LEN];
5699
5700static const char *scsi_debug_info(struct Scsi_Host *shp)
5701{
5702 int k;
5703
5704 k = scnprintf(sdebug_info, SDEBUG_INFO_LEN, "%s: version %s [%s]\n",
5705 my_name, SDEBUG_VERSION, sdebug_version_date);
5706 if (k >= (SDEBUG_INFO_LEN - 1))
5707 return sdebug_info;
5708 scnprintf(sdebug_info + k, SDEBUG_INFO_LEN - k,
5709 " dev_size_mb=%d, opts=0x%x, submit_queues=%d, %s=%d",
5710 sdebug_dev_size_mb, sdebug_opts, submit_queues,
5711 "statistics", (int)sdebug_statistics);
5712 return sdebug_info;
5713}
5714
5715/* 'echo <val> > /proc/scsi/scsi_debug/<host_id>' writes to opts */
5716static int scsi_debug_write_info(struct Scsi_Host *host, char *buffer,
5717 int length)
5718{
5719 char arr[16];
5720 int opts;
5721 int minLen = length > 15 ? 15 : length;
5722
5723 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
5724 return -EACCES;
5725 memcpy(arr, buffer, minLen);
5726 arr[minLen] = '\0';
5727 if (1 != sscanf(arr, "%d", &opts))
5728 return -EINVAL;
5729 sdebug_opts = opts;
5730 sdebug_verbose = !!(SDEBUG_OPT_NOISE & opts);
5731 sdebug_any_injecting_opt = !!(SDEBUG_OPT_ALL_INJECTING & opts);
5732 if (sdebug_every_nth != 0)
5733 tweak_cmnd_count();
5734 return length;
5735}
5736
5737/* Output seen with 'cat /proc/scsi/scsi_debug/<host_id>'. It will be the
5738 * same for each scsi_debug host (if more than one). Some of the counters
5739 * output are not atomics so might be inaccurate in a busy system. */
5740static int scsi_debug_show_info(struct seq_file *m, struct Scsi_Host *host)
5741{
5742 int f, j, l;
5743 struct sdebug_queue *sqp;
5744 struct sdebug_host_info *sdhp;
5745
5746 seq_printf(m, "scsi_debug adapter driver, version %s [%s]\n",
5747 SDEBUG_VERSION, sdebug_version_date);
5748 seq_printf(m, "num_tgts=%d, %ssize=%d MB, opts=0x%x, every_nth=%d\n",
5749 sdebug_num_tgts, "shared (ram) ", sdebug_dev_size_mb,
5750 sdebug_opts, sdebug_every_nth);
5751 seq_printf(m, "delay=%d, ndelay=%d, max_luns=%d, sector_size=%d %s\n",
5752 sdebug_jdelay, sdebug_ndelay, sdebug_max_luns,
5753 sdebug_sector_size, "bytes");
5754 seq_printf(m, "cylinders=%d, heads=%d, sectors=%d, command aborts=%d\n",
5755 sdebug_cylinders_per, sdebug_heads, sdebug_sectors_per,
5756 num_aborts);
5757 seq_printf(m, "RESETs: device=%d, target=%d, bus=%d, host=%d\n",
5758 num_dev_resets, num_target_resets, num_bus_resets,
5759 num_host_resets);
5760 seq_printf(m, "dix_reads=%d, dix_writes=%d, dif_errors=%d\n",
5761 dix_reads, dix_writes, dif_errors);
5762 seq_printf(m, "usec_in_jiffy=%lu, statistics=%d\n", TICK_NSEC / 1000,
5763 sdebug_statistics);
5764 seq_printf(m, "cmnd_count=%d, completions=%d, %s=%d, a_tsf=%d\n",
5765 atomic_read(&sdebug_cmnd_count),
5766 atomic_read(&sdebug_completions),
5767 "miss_cpus", atomic_read(&sdebug_miss_cpus),
5768 atomic_read(&sdebug_a_tsf));
5769
5770 seq_printf(m, "submit_queues=%d\n", submit_queues);
5771 for (j = 0, sqp = sdebug_q_arr; j < submit_queues; ++j, ++sqp) {
5772 seq_printf(m, " queue %d:\n", j);
5773 f = find_first_bit(sqp->in_use_bm, sdebug_max_queue);
5774 if (f != sdebug_max_queue) {
5775 l = find_last_bit(sqp->in_use_bm, sdebug_max_queue);
5776 seq_printf(m, " in_use_bm BUSY: %s: %d,%d\n",
5777 "first,last bits", f, l);
5778 }
5779 }
5780
5781 seq_printf(m, "this host_no=%d\n", host->host_no);
5782 if (!xa_empty(per_store_ap)) {
5783 bool niu;
5784 int idx;
5785 unsigned long l_idx;
5786 struct sdeb_store_info *sip;
5787
5788 seq_puts(m, "\nhost list:\n");
5789 j = 0;
5790 list_for_each_entry(sdhp, &sdebug_host_list, host_list) {
5791 idx = sdhp->si_idx;
5792 seq_printf(m, " %d: host_no=%d, si_idx=%d\n", j,
5793 sdhp->shost->host_no, idx);
5794 ++j;
5795 }
5796 seq_printf(m, "\nper_store array [most_recent_idx=%d]:\n",
5797 sdeb_most_recent_idx);
5798 j = 0;
5799 xa_for_each(per_store_ap, l_idx, sip) {
5800 niu = xa_get_mark(per_store_ap, l_idx,
5801 SDEB_XA_NOT_IN_USE);
5802 idx = (int)l_idx;
5803 seq_printf(m, " %d: idx=%d%s\n", j, idx,
5804 (niu ? " not_in_use" : ""));
5805 ++j;
5806 }
5807 }
5808 return 0;
5809}
5810
5811static ssize_t delay_show(struct device_driver *ddp, char *buf)
5812{
5813 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_jdelay);
5814}
5815/* Returns -EBUSY if jdelay is being changed and commands are queued. The unit
5816 * of delay is jiffies.
5817 */
5818static ssize_t delay_store(struct device_driver *ddp, const char *buf,
5819 size_t count)
5820{
5821 int jdelay, res;
5822
5823 if (count > 0 && sscanf(buf, "%d", &jdelay) == 1) {
5824 res = count;
5825 if (sdebug_jdelay != jdelay) {
5826 int j, k;
5827 struct sdebug_queue *sqp;
5828
5829 block_unblock_all_queues(true);
5830 for (j = 0, sqp = sdebug_q_arr; j < submit_queues;
5831 ++j, ++sqp) {
5832 k = find_first_bit(sqp->in_use_bm,
5833 sdebug_max_queue);
5834 if (k != sdebug_max_queue) {
5835 res = -EBUSY; /* queued commands */
5836 break;
5837 }
5838 }
5839 if (res > 0) {
5840 sdebug_jdelay = jdelay;
5841 sdebug_ndelay = 0;
5842 }
5843 block_unblock_all_queues(false);
5844 }
5845 return res;
5846 }
5847 return -EINVAL;
5848}
5849static DRIVER_ATTR_RW(delay);
5850
5851static ssize_t ndelay_show(struct device_driver *ddp, char *buf)
5852{
5853 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_ndelay);
5854}
5855/* Returns -EBUSY if ndelay is being changed and commands are queued */
5856/* If > 0 and accepted then sdebug_jdelay is set to JDELAY_OVERRIDDEN */
5857static ssize_t ndelay_store(struct device_driver *ddp, const char *buf,
5858 size_t count)
5859{
5860 int ndelay, res;
5861
5862 if ((count > 0) && (1 == sscanf(buf, "%d", &ndelay)) &&
5863 (ndelay >= 0) && (ndelay < (1000 * 1000 * 1000))) {
5864 res = count;
5865 if (sdebug_ndelay != ndelay) {
5866 int j, k;
5867 struct sdebug_queue *sqp;
5868
5869 block_unblock_all_queues(true);
5870 for (j = 0, sqp = sdebug_q_arr; j < submit_queues;
5871 ++j, ++sqp) {
5872 k = find_first_bit(sqp->in_use_bm,
5873 sdebug_max_queue);
5874 if (k != sdebug_max_queue) {
5875 res = -EBUSY; /* queued commands */
5876 break;
5877 }
5878 }
5879 if (res > 0) {
5880 sdebug_ndelay = ndelay;
5881 sdebug_jdelay = ndelay ? JDELAY_OVERRIDDEN
5882 : DEF_JDELAY;
5883 }
5884 block_unblock_all_queues(false);
5885 }
5886 return res;
5887 }
5888 return -EINVAL;
5889}
5890static DRIVER_ATTR_RW(ndelay);
5891
5892static ssize_t opts_show(struct device_driver *ddp, char *buf)
5893{
5894 return scnprintf(buf, PAGE_SIZE, "0x%x\n", sdebug_opts);
5895}
5896
5897static ssize_t opts_store(struct device_driver *ddp, const char *buf,
5898 size_t count)
5899{
5900 int opts;
5901 char work[20];
5902
5903 if (sscanf(buf, "%10s", work) == 1) {
5904 if (strncasecmp(work, "0x", 2) == 0) {
5905 if (kstrtoint(work + 2, 16, &opts) == 0)
5906 goto opts_done;
5907 } else {
5908 if (kstrtoint(work, 10, &opts) == 0)
5909 goto opts_done;
5910 }
5911 }
5912 return -EINVAL;
5913opts_done:
5914 sdebug_opts = opts;
5915 sdebug_verbose = !!(SDEBUG_OPT_NOISE & opts);
5916 sdebug_any_injecting_opt = !!(SDEBUG_OPT_ALL_INJECTING & opts);
5917 tweak_cmnd_count();
5918 return count;
5919}
5920static DRIVER_ATTR_RW(opts);
5921
5922static ssize_t ptype_show(struct device_driver *ddp, char *buf)
5923{
5924 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_ptype);
5925}
5926static ssize_t ptype_store(struct device_driver *ddp, const char *buf,
5927 size_t count)
5928{
5929 int n;
5930
5931 /* Cannot change from or to TYPE_ZBC with sysfs */
5932 if (sdebug_ptype == TYPE_ZBC)
5933 return -EINVAL;
5934
5935 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
5936 if (n == TYPE_ZBC)
5937 return -EINVAL;
5938 sdebug_ptype = n;
5939 return count;
5940 }
5941 return -EINVAL;
5942}
5943static DRIVER_ATTR_RW(ptype);
5944
5945static ssize_t dsense_show(struct device_driver *ddp, char *buf)
5946{
5947 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_dsense);
5948}
5949static ssize_t dsense_store(struct device_driver *ddp, const char *buf,
5950 size_t count)
5951{
5952 int n;
5953
5954 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
5955 sdebug_dsense = n;
5956 return count;
5957 }
5958 return -EINVAL;
5959}
5960static DRIVER_ATTR_RW(dsense);
5961
5962static ssize_t fake_rw_show(struct device_driver *ddp, char *buf)
5963{
5964 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_fake_rw);
5965}
5966static ssize_t fake_rw_store(struct device_driver *ddp, const char *buf,
5967 size_t count)
5968{
5969 int n, idx;
5970
5971 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
5972 bool want_store = (n == 0);
5973 struct sdebug_host_info *sdhp;
5974
5975 n = (n > 0);
5976 sdebug_fake_rw = (sdebug_fake_rw > 0);
5977 if (sdebug_fake_rw == n)
5978 return count; /* not transitioning so do nothing */
5979
5980 if (want_store) { /* 1 --> 0 transition, set up store */
5981 if (sdeb_first_idx < 0) {
5982 idx = sdebug_add_store();
5983 if (idx < 0)
5984 return idx;
5985 } else {
5986 idx = sdeb_first_idx;
5987 xa_clear_mark(per_store_ap, idx,
5988 SDEB_XA_NOT_IN_USE);
5989 }
5990 /* make all hosts use same store */
5991 list_for_each_entry(sdhp, &sdebug_host_list,
5992 host_list) {
5993 if (sdhp->si_idx != idx) {
5994 xa_set_mark(per_store_ap, sdhp->si_idx,
5995 SDEB_XA_NOT_IN_USE);
5996 sdhp->si_idx = idx;
5997 }
5998 }
5999 sdeb_most_recent_idx = idx;
6000 } else { /* 0 --> 1 transition is trigger for shrink */
6001 sdebug_erase_all_stores(true /* apart from first */);
6002 }
6003 sdebug_fake_rw = n;
6004 return count;
6005 }
6006 return -EINVAL;
6007}
6008static DRIVER_ATTR_RW(fake_rw);
6009
6010static ssize_t no_lun_0_show(struct device_driver *ddp, char *buf)
6011{
6012 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_no_lun_0);
6013}
6014static ssize_t no_lun_0_store(struct device_driver *ddp, const char *buf,
6015 size_t count)
6016{
6017 int n;
6018
6019 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
6020 sdebug_no_lun_0 = n;
6021 return count;
6022 }
6023 return -EINVAL;
6024}
6025static DRIVER_ATTR_RW(no_lun_0);
6026
6027static ssize_t num_tgts_show(struct device_driver *ddp, char *buf)
6028{
6029 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_num_tgts);
6030}
6031static ssize_t num_tgts_store(struct device_driver *ddp, const char *buf,
6032 size_t count)
6033{
6034 int n;
6035
6036 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
6037 sdebug_num_tgts = n;
6038 sdebug_max_tgts_luns();
6039 return count;
6040 }
6041 return -EINVAL;
6042}
6043static DRIVER_ATTR_RW(num_tgts);
6044
6045static ssize_t dev_size_mb_show(struct device_driver *ddp, char *buf)
6046{
6047 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_dev_size_mb);
6048}
6049static DRIVER_ATTR_RO(dev_size_mb);
6050
6051static ssize_t per_host_store_show(struct device_driver *ddp, char *buf)
6052{
6053 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_per_host_store);
6054}
6055
6056static ssize_t per_host_store_store(struct device_driver *ddp, const char *buf,
6057 size_t count)
6058{
6059 bool v;
6060
6061 if (kstrtobool(buf, &v))
6062 return -EINVAL;
6063
6064 sdebug_per_host_store = v;
6065 return count;
6066}
6067static DRIVER_ATTR_RW(per_host_store);
6068
6069static ssize_t num_parts_show(struct device_driver *ddp, char *buf)
6070{
6071 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_num_parts);
6072}
6073static DRIVER_ATTR_RO(num_parts);
6074
6075static ssize_t every_nth_show(struct device_driver *ddp, char *buf)
6076{
6077 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_every_nth);
6078}
6079static ssize_t every_nth_store(struct device_driver *ddp, const char *buf,
6080 size_t count)
6081{
6082 int nth;
6083 char work[20];
6084
6085 if (sscanf(buf, "%10s", work) == 1) {
6086 if (strncasecmp(work, "0x", 2) == 0) {
6087 if (kstrtoint(work + 2, 16, &nth) == 0)
6088 goto every_nth_done;
6089 } else {
6090 if (kstrtoint(work, 10, &nth) == 0)
6091 goto every_nth_done;
6092 }
6093 }
6094 return -EINVAL;
6095
6096every_nth_done:
6097 sdebug_every_nth = nth;
6098 if (nth && !sdebug_statistics) {
6099 pr_info("every_nth needs statistics=1, set it\n");
6100 sdebug_statistics = true;
6101 }
6102 tweak_cmnd_count();
6103 return count;
6104}
6105static DRIVER_ATTR_RW(every_nth);
6106
6107static ssize_t max_luns_show(struct device_driver *ddp, char *buf)
6108{
6109 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_max_luns);
6110}
6111static ssize_t max_luns_store(struct device_driver *ddp, const char *buf,
6112 size_t count)
6113{
6114 int n;
6115 bool changed;
6116
6117 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
6118 if (n > 256) {
6119 pr_warn("max_luns can be no more than 256\n");
6120 return -EINVAL;
6121 }
6122 changed = (sdebug_max_luns != n);
6123 sdebug_max_luns = n;
6124 sdebug_max_tgts_luns();
6125 if (changed && (sdebug_scsi_level >= 5)) { /* >= SPC-3 */
6126 struct sdebug_host_info *sdhp;
6127 struct sdebug_dev_info *dp;
6128
6129 spin_lock(&sdebug_host_list_lock);
6130 list_for_each_entry(sdhp, &sdebug_host_list,
6131 host_list) {
6132 list_for_each_entry(dp, &sdhp->dev_info_list,
6133 dev_list) {
6134 set_bit(SDEBUG_UA_LUNS_CHANGED,
6135 dp->uas_bm);
6136 }
6137 }
6138 spin_unlock(&sdebug_host_list_lock);
6139 }
6140 return count;
6141 }
6142 return -EINVAL;
6143}
6144static DRIVER_ATTR_RW(max_luns);
6145
6146static ssize_t max_queue_show(struct device_driver *ddp, char *buf)
6147{
6148 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_max_queue);
6149}
6150/* N.B. max_queue can be changed while there are queued commands. In flight
6151 * commands beyond the new max_queue will be completed. */
6152static ssize_t max_queue_store(struct device_driver *ddp, const char *buf,
6153 size_t count)
6154{
6155 int j, n, k, a;
6156 struct sdebug_queue *sqp;
6157
6158 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n > 0) &&
6159 (n <= SDEBUG_CANQUEUE) &&
6160 (sdebug_host_max_queue == 0)) {
6161 block_unblock_all_queues(true);
6162 k = 0;
6163 for (j = 0, sqp = sdebug_q_arr; j < submit_queues;
6164 ++j, ++sqp) {
6165 a = find_last_bit(sqp->in_use_bm, SDEBUG_CANQUEUE);
6166 if (a > k)
6167 k = a;
6168 }
6169 sdebug_max_queue = n;
6170 if (k == SDEBUG_CANQUEUE)
6171 atomic_set(&retired_max_queue, 0);
6172 else if (k >= n)
6173 atomic_set(&retired_max_queue, k + 1);
6174 else
6175 atomic_set(&retired_max_queue, 0);
6176 block_unblock_all_queues(false);
6177 return count;
6178 }
6179 return -EINVAL;
6180}
6181static DRIVER_ATTR_RW(max_queue);
6182
6183static ssize_t host_max_queue_show(struct device_driver *ddp, char *buf)
6184{
6185 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_host_max_queue);
6186}
6187
6188/*
6189 * Since this is used for .can_queue, and we get the hc_idx tag from the bitmap
6190 * in range [0, sdebug_host_max_queue), we can't change it.
6191 */
6192static DRIVER_ATTR_RO(host_max_queue);
6193
6194static ssize_t no_uld_show(struct device_driver *ddp, char *buf)
6195{
6196 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_no_uld);
6197}
6198static DRIVER_ATTR_RO(no_uld);
6199
6200static ssize_t scsi_level_show(struct device_driver *ddp, char *buf)
6201{
6202 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_scsi_level);
6203}
6204static DRIVER_ATTR_RO(scsi_level);
6205
6206static ssize_t virtual_gb_show(struct device_driver *ddp, char *buf)
6207{
6208 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_virtual_gb);
6209}
6210static ssize_t virtual_gb_store(struct device_driver *ddp, const char *buf,
6211 size_t count)
6212{
6213 int n;
6214 bool changed;
6215
6216 /* Ignore capacity change for ZBC drives for now */
6217 if (sdeb_zbc_in_use)
6218 return -ENOTSUPP;
6219
6220 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
6221 changed = (sdebug_virtual_gb != n);
6222 sdebug_virtual_gb = n;
6223 sdebug_capacity = get_sdebug_capacity();
6224 if (changed) {
6225 struct sdebug_host_info *sdhp;
6226 struct sdebug_dev_info *dp;
6227
6228 spin_lock(&sdebug_host_list_lock);
6229 list_for_each_entry(sdhp, &sdebug_host_list,
6230 host_list) {
6231 list_for_each_entry(dp, &sdhp->dev_info_list,
6232 dev_list) {
6233 set_bit(SDEBUG_UA_CAPACITY_CHANGED,
6234 dp->uas_bm);
6235 }
6236 }
6237 spin_unlock(&sdebug_host_list_lock);
6238 }
6239 return count;
6240 }
6241 return -EINVAL;
6242}
6243static DRIVER_ATTR_RW(virtual_gb);
6244
6245static ssize_t add_host_show(struct device_driver *ddp, char *buf)
6246{
6247 /* absolute number of hosts currently active is what is shown */
6248 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_num_hosts);
6249}
6250
6251static ssize_t add_host_store(struct device_driver *ddp, const char *buf,
6252 size_t count)
6253{
6254 bool found;
6255 unsigned long idx;
6256 struct sdeb_store_info *sip;
6257 bool want_phs = (sdebug_fake_rw == 0) && sdebug_per_host_store;
6258 int delta_hosts;
6259
6260 if (sscanf(buf, "%d", &delta_hosts) != 1)
6261 return -EINVAL;
6262 if (delta_hosts > 0) {
6263 do {
6264 found = false;
6265 if (want_phs) {
6266 xa_for_each_marked(per_store_ap, idx, sip,
6267 SDEB_XA_NOT_IN_USE) {
6268 sdeb_most_recent_idx = (int)idx;
6269 found = true;
6270 break;
6271 }
6272 if (found) /* re-use case */
6273 sdebug_add_host_helper((int)idx);
6274 else
6275 sdebug_do_add_host(true);
6276 } else {
6277 sdebug_do_add_host(false);
6278 }
6279 } while (--delta_hosts);
6280 } else if (delta_hosts < 0) {
6281 do {
6282 sdebug_do_remove_host(false);
6283 } while (++delta_hosts);
6284 }
6285 return count;
6286}
6287static DRIVER_ATTR_RW(add_host);
6288
6289static ssize_t vpd_use_hostno_show(struct device_driver *ddp, char *buf)
6290{
6291 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_vpd_use_hostno);
6292}
6293static ssize_t vpd_use_hostno_store(struct device_driver *ddp, const char *buf,
6294 size_t count)
6295{
6296 int n;
6297
6298 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
6299 sdebug_vpd_use_hostno = n;
6300 return count;
6301 }
6302 return -EINVAL;
6303}
6304static DRIVER_ATTR_RW(vpd_use_hostno);
6305
6306static ssize_t statistics_show(struct device_driver *ddp, char *buf)
6307{
6308 return scnprintf(buf, PAGE_SIZE, "%d\n", (int)sdebug_statistics);
6309}
6310static ssize_t statistics_store(struct device_driver *ddp, const char *buf,
6311 size_t count)
6312{
6313 int n;
6314
6315 if ((count > 0) && (sscanf(buf, "%d", &n) == 1) && (n >= 0)) {
6316 if (n > 0)
6317 sdebug_statistics = true;
6318 else {
6319 clear_queue_stats();
6320 sdebug_statistics = false;
6321 }
6322 return count;
6323 }
6324 return -EINVAL;
6325}
6326static DRIVER_ATTR_RW(statistics);
6327
6328static ssize_t sector_size_show(struct device_driver *ddp, char *buf)
6329{
6330 return scnprintf(buf, PAGE_SIZE, "%u\n", sdebug_sector_size);
6331}
6332static DRIVER_ATTR_RO(sector_size);
6333
6334static ssize_t submit_queues_show(struct device_driver *ddp, char *buf)
6335{
6336 return scnprintf(buf, PAGE_SIZE, "%d\n", submit_queues);
6337}
6338static DRIVER_ATTR_RO(submit_queues);
6339
6340static ssize_t dix_show(struct device_driver *ddp, char *buf)
6341{
6342 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_dix);
6343}
6344static DRIVER_ATTR_RO(dix);
6345
6346static ssize_t dif_show(struct device_driver *ddp, char *buf)
6347{
6348 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_dif);
6349}
6350static DRIVER_ATTR_RO(dif);
6351
6352static ssize_t guard_show(struct device_driver *ddp, char *buf)
6353{
6354 return scnprintf(buf, PAGE_SIZE, "%u\n", sdebug_guard);
6355}
6356static DRIVER_ATTR_RO(guard);
6357
6358static ssize_t ato_show(struct device_driver *ddp, char *buf)
6359{
6360 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_ato);
6361}
6362static DRIVER_ATTR_RO(ato);
6363
6364static ssize_t map_show(struct device_driver *ddp, char *buf)
6365{
6366 ssize_t count = 0;
6367
6368 if (!scsi_debug_lbp())
6369 return scnprintf(buf, PAGE_SIZE, "0-%u\n",
6370 sdebug_store_sectors);
6371
6372 if (sdebug_fake_rw == 0 && !xa_empty(per_store_ap)) {
6373 struct sdeb_store_info *sip = xa_load(per_store_ap, 0);
6374
6375 if (sip)
6376 count = scnprintf(buf, PAGE_SIZE - 1, "%*pbl",
6377 (int)map_size, sip->map_storep);
6378 }
6379 buf[count++] = '\n';
6380 buf[count] = '\0';
6381
6382 return count;
6383}
6384static DRIVER_ATTR_RO(map);
6385
6386static ssize_t random_show(struct device_driver *ddp, char *buf)
6387{
6388 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_random);
6389}
6390
6391static ssize_t random_store(struct device_driver *ddp, const char *buf,
6392 size_t count)
6393{
6394 bool v;
6395
6396 if (kstrtobool(buf, &v))
6397 return -EINVAL;
6398
6399 sdebug_random = v;
6400 return count;
6401}
6402static DRIVER_ATTR_RW(random);
6403
6404static ssize_t removable_show(struct device_driver *ddp, char *buf)
6405{
6406 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_removable ? 1 : 0);
6407}
6408static ssize_t removable_store(struct device_driver *ddp, const char *buf,
6409 size_t count)
6410{
6411 int n;
6412
6413 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
6414 sdebug_removable = (n > 0);
6415 return count;
6416 }
6417 return -EINVAL;
6418}
6419static DRIVER_ATTR_RW(removable);
6420
6421static ssize_t host_lock_show(struct device_driver *ddp, char *buf)
6422{
6423 return scnprintf(buf, PAGE_SIZE, "%d\n", !!sdebug_host_lock);
6424}
6425/* N.B. sdebug_host_lock does nothing, kept for backward compatibility */
6426static ssize_t host_lock_store(struct device_driver *ddp, const char *buf,
6427 size_t count)
6428{
6429 int n;
6430
6431 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
6432 sdebug_host_lock = (n > 0);
6433 return count;
6434 }
6435 return -EINVAL;
6436}
6437static DRIVER_ATTR_RW(host_lock);
6438
6439static ssize_t strict_show(struct device_driver *ddp, char *buf)
6440{
6441 return scnprintf(buf, PAGE_SIZE, "%d\n", !!sdebug_strict);
6442}
6443static ssize_t strict_store(struct device_driver *ddp, const char *buf,
6444 size_t count)
6445{
6446 int n;
6447
6448 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
6449 sdebug_strict = (n > 0);
6450 return count;
6451 }
6452 return -EINVAL;
6453}
6454static DRIVER_ATTR_RW(strict);
6455
6456static ssize_t uuid_ctl_show(struct device_driver *ddp, char *buf)
6457{
6458 return scnprintf(buf, PAGE_SIZE, "%d\n", !!sdebug_uuid_ctl);
6459}
6460static DRIVER_ATTR_RO(uuid_ctl);
6461
6462static ssize_t cdb_len_show(struct device_driver *ddp, char *buf)
6463{
6464 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_cdb_len);
6465}
6466static ssize_t cdb_len_store(struct device_driver *ddp, const char *buf,
6467 size_t count)
6468{
6469 int ret, n;
6470
6471 ret = kstrtoint(buf, 0, &n);
6472 if (ret)
6473 return ret;
6474 sdebug_cdb_len = n;
6475 all_config_cdb_len();
6476 return count;
6477}
6478static DRIVER_ATTR_RW(cdb_len);
6479
6480static const char * const zbc_model_strs_a[] = {
6481 [BLK_ZONED_NONE] = "none",
6482 [BLK_ZONED_HA] = "host-aware",
6483 [BLK_ZONED_HM] = "host-managed",
6484};
6485
6486static const char * const zbc_model_strs_b[] = {
6487 [BLK_ZONED_NONE] = "no",
6488 [BLK_ZONED_HA] = "aware",
6489 [BLK_ZONED_HM] = "managed",
6490};
6491
6492static const char * const zbc_model_strs_c[] = {
6493 [BLK_ZONED_NONE] = "0",
6494 [BLK_ZONED_HA] = "1",
6495 [BLK_ZONED_HM] = "2",
6496};
6497
6498static int sdeb_zbc_model_str(const char *cp)
6499{
6500 int res = sysfs_match_string(zbc_model_strs_a, cp);
6501
6502 if (res < 0) {
6503 res = sysfs_match_string(zbc_model_strs_b, cp);
6504 if (res < 0) {
6505 res = sysfs_match_string(zbc_model_strs_c, cp);
6506 if (res < 0)
6507 return -EINVAL;
6508 }
6509 }
6510 return res;
6511}
6512
6513static ssize_t zbc_show(struct device_driver *ddp, char *buf)
6514{
6515 return scnprintf(buf, PAGE_SIZE, "%s\n",
6516 zbc_model_strs_a[sdeb_zbc_model]);
6517}
6518static DRIVER_ATTR_RO(zbc);
6519
6520static ssize_t tur_ms_to_ready_show(struct device_driver *ddp, char *buf)
6521{
6522 return scnprintf(buf, PAGE_SIZE, "%d\n", sdeb_tur_ms_to_ready);
6523}
6524static DRIVER_ATTR_RO(tur_ms_to_ready);
6525
6526/* Note: The following array creates attribute files in the
6527 /sys/bus/pseudo/drivers/scsi_debug directory. The advantage of these
6528 files (over those found in the /sys/module/scsi_debug/parameters
6529 directory) is that auxiliary actions can be triggered when an attribute
6530 is changed. For example see: add_host_store() above.
6531 */
6532
6533static struct attribute *sdebug_drv_attrs[] = {
6534 &driver_attr_delay.attr,
6535 &driver_attr_opts.attr,
6536 &driver_attr_ptype.attr,
6537 &driver_attr_dsense.attr,
6538 &driver_attr_fake_rw.attr,
6539 &driver_attr_host_max_queue.attr,
6540 &driver_attr_no_lun_0.attr,
6541 &driver_attr_num_tgts.attr,
6542 &driver_attr_dev_size_mb.attr,
6543 &driver_attr_num_parts.attr,
6544 &driver_attr_every_nth.attr,
6545 &driver_attr_max_luns.attr,
6546 &driver_attr_max_queue.attr,
6547 &driver_attr_no_uld.attr,
6548 &driver_attr_scsi_level.attr,
6549 &driver_attr_virtual_gb.attr,
6550 &driver_attr_add_host.attr,
6551 &driver_attr_per_host_store.attr,
6552 &driver_attr_vpd_use_hostno.attr,
6553 &driver_attr_sector_size.attr,
6554 &driver_attr_statistics.attr,
6555 &driver_attr_submit_queues.attr,
6556 &driver_attr_dix.attr,
6557 &driver_attr_dif.attr,
6558 &driver_attr_guard.attr,
6559 &driver_attr_ato.attr,
6560 &driver_attr_map.attr,
6561 &driver_attr_random.attr,
6562 &driver_attr_removable.attr,
6563 &driver_attr_host_lock.attr,
6564 &driver_attr_ndelay.attr,
6565 &driver_attr_strict.attr,
6566 &driver_attr_uuid_ctl.attr,
6567 &driver_attr_cdb_len.attr,
6568 &driver_attr_tur_ms_to_ready.attr,
6569 &driver_attr_zbc.attr,
6570 NULL,
6571};
6572ATTRIBUTE_GROUPS(sdebug_drv);
6573
6574static struct device *pseudo_primary;
6575
6576static int __init scsi_debug_init(void)
6577{
6578 bool want_store = (sdebug_fake_rw == 0);
6579 unsigned long sz;
6580 int k, ret, hosts_to_add;
6581 int idx = -1;
6582
6583 ramdisk_lck_a[0] = &atomic_rw;
6584 ramdisk_lck_a[1] = &atomic_rw2;
6585 atomic_set(&retired_max_queue, 0);
6586
6587 if (sdebug_ndelay >= 1000 * 1000 * 1000) {
6588 pr_warn("ndelay must be less than 1 second, ignored\n");
6589 sdebug_ndelay = 0;
6590 } else if (sdebug_ndelay > 0)
6591 sdebug_jdelay = JDELAY_OVERRIDDEN;
6592
6593 switch (sdebug_sector_size) {
6594 case 512:
6595 case 1024:
6596 case 2048:
6597 case 4096:
6598 break;
6599 default:
6600 pr_err("invalid sector_size %d\n", sdebug_sector_size);
6601 return -EINVAL;
6602 }
6603
6604 switch (sdebug_dif) {
6605 case T10_PI_TYPE0_PROTECTION:
6606 break;
6607 case T10_PI_TYPE1_PROTECTION:
6608 case T10_PI_TYPE2_PROTECTION:
6609 case T10_PI_TYPE3_PROTECTION:
6610 have_dif_prot = true;
6611 break;
6612
6613 default:
6614 pr_err("dif must be 0, 1, 2 or 3\n");
6615 return -EINVAL;
6616 }
6617
6618 if (sdebug_num_tgts < 0) {
6619 pr_err("num_tgts must be >= 0\n");
6620 return -EINVAL;
6621 }
6622
6623 if (sdebug_guard > 1) {
6624 pr_err("guard must be 0 or 1\n");
6625 return -EINVAL;
6626 }
6627
6628 if (sdebug_ato > 1) {
6629 pr_err("ato must be 0 or 1\n");
6630 return -EINVAL;
6631 }
6632
6633 if (sdebug_physblk_exp > 15) {
6634 pr_err("invalid physblk_exp %u\n", sdebug_physblk_exp);
6635 return -EINVAL;
6636 }
6637 if (sdebug_max_luns > 256) {
6638 pr_warn("max_luns can be no more than 256, use default\n");
6639 sdebug_max_luns = DEF_MAX_LUNS;
6640 }
6641
6642 if (sdebug_lowest_aligned > 0x3fff) {
6643 pr_err("lowest_aligned too big: %u\n", sdebug_lowest_aligned);
6644 return -EINVAL;
6645 }
6646
6647 if (submit_queues < 1) {
6648 pr_err("submit_queues must be 1 or more\n");
6649 return -EINVAL;
6650 }
6651
6652 if ((sdebug_max_queue > SDEBUG_CANQUEUE) || (sdebug_max_queue < 1)) {
6653 pr_err("max_queue must be in range [1, %d]\n", SDEBUG_CANQUEUE);
6654 return -EINVAL;
6655 }
6656
6657 if ((sdebug_host_max_queue > SDEBUG_CANQUEUE) ||
6658 (sdebug_host_max_queue < 0)) {
6659 pr_err("host_max_queue must be in range [0 %d]\n",
6660 SDEBUG_CANQUEUE);
6661 return -EINVAL;
6662 }
6663
6664 if (sdebug_host_max_queue &&
6665 (sdebug_max_queue != sdebug_host_max_queue)) {
6666 sdebug_max_queue = sdebug_host_max_queue;
6667 pr_warn("fixing max submit queue depth to host max queue depth, %d\n",
6668 sdebug_max_queue);
6669 }
6670
6671 sdebug_q_arr = kcalloc(submit_queues, sizeof(struct sdebug_queue),
6672 GFP_KERNEL);
6673 if (sdebug_q_arr == NULL)
6674 return -ENOMEM;
6675 for (k = 0; k < submit_queues; ++k)
6676 spin_lock_init(&sdebug_q_arr[k].qc_lock);
6677
6678 /*
6679 * check for host managed zoned block device specified with
6680 * ptype=0x14 or zbc=XXX.
6681 */
6682 if (sdebug_ptype == TYPE_ZBC) {
6683 sdeb_zbc_model = BLK_ZONED_HM;
6684 } else if (sdeb_zbc_model_s && *sdeb_zbc_model_s) {
6685 k = sdeb_zbc_model_str(sdeb_zbc_model_s);
6686 if (k < 0) {
6687 ret = k;
6688 goto free_vm;
6689 }
6690 sdeb_zbc_model = k;
6691 switch (sdeb_zbc_model) {
6692 case BLK_ZONED_NONE:
6693 case BLK_ZONED_HA:
6694 sdebug_ptype = TYPE_DISK;
6695 break;
6696 case BLK_ZONED_HM:
6697 sdebug_ptype = TYPE_ZBC;
6698 break;
6699 default:
6700 pr_err("Invalid ZBC model\n");
6701 return -EINVAL;
6702 }
6703 }
6704 if (sdeb_zbc_model != BLK_ZONED_NONE) {
6705 sdeb_zbc_in_use = true;
6706 if (sdebug_dev_size_mb == DEF_DEV_SIZE_PRE_INIT)
6707 sdebug_dev_size_mb = DEF_ZBC_DEV_SIZE_MB;
6708 }
6709
6710 if (sdebug_dev_size_mb == DEF_DEV_SIZE_PRE_INIT)
6711 sdebug_dev_size_mb = DEF_DEV_SIZE_MB;
6712 if (sdebug_dev_size_mb < 1)
6713 sdebug_dev_size_mb = 1; /* force minimum 1 MB ramdisk */
6714 sz = (unsigned long)sdebug_dev_size_mb * 1048576;
6715 sdebug_store_sectors = sz / sdebug_sector_size;
6716 sdebug_capacity = get_sdebug_capacity();
6717
6718 /* play around with geometry, don't waste too much on track 0 */
6719 sdebug_heads = 8;
6720 sdebug_sectors_per = 32;
6721 if (sdebug_dev_size_mb >= 256)
6722 sdebug_heads = 64;
6723 else if (sdebug_dev_size_mb >= 16)
6724 sdebug_heads = 32;
6725 sdebug_cylinders_per = (unsigned long)sdebug_capacity /
6726 (sdebug_sectors_per * sdebug_heads);
6727 if (sdebug_cylinders_per >= 1024) {
6728 /* other LLDs do this; implies >= 1GB ram disk ... */
6729 sdebug_heads = 255;
6730 sdebug_sectors_per = 63;
6731 sdebug_cylinders_per = (unsigned long)sdebug_capacity /
6732 (sdebug_sectors_per * sdebug_heads);
6733 }
6734 if (scsi_debug_lbp()) {
6735 sdebug_unmap_max_blocks =
6736 clamp(sdebug_unmap_max_blocks, 0U, 0xffffffffU);
6737
6738 sdebug_unmap_max_desc =
6739 clamp(sdebug_unmap_max_desc, 0U, 256U);
6740
6741 sdebug_unmap_granularity =
6742 clamp(sdebug_unmap_granularity, 1U, 0xffffffffU);
6743
6744 if (sdebug_unmap_alignment &&
6745 sdebug_unmap_granularity <=
6746 sdebug_unmap_alignment) {
6747 pr_err("ERR: unmap_granularity <= unmap_alignment\n");
6748 ret = -EINVAL;
6749 goto free_q_arr;
6750 }
6751 }
6752 xa_init_flags(per_store_ap, XA_FLAGS_ALLOC | XA_FLAGS_LOCK_IRQ);
6753 if (want_store) {
6754 idx = sdebug_add_store();
6755 if (idx < 0) {
6756 ret = idx;
6757 goto free_q_arr;
6758 }
6759 }
6760
6761 pseudo_primary = root_device_register("pseudo_0");
6762 if (IS_ERR(pseudo_primary)) {
6763 pr_warn("root_device_register() error\n");
6764 ret = PTR_ERR(pseudo_primary);
6765 goto free_vm;
6766 }
6767 ret = bus_register(&pseudo_lld_bus);
6768 if (ret < 0) {
6769 pr_warn("bus_register error: %d\n", ret);
6770 goto dev_unreg;
6771 }
6772 ret = driver_register(&sdebug_driverfs_driver);
6773 if (ret < 0) {
6774 pr_warn("driver_register error: %d\n", ret);
6775 goto bus_unreg;
6776 }
6777
6778 hosts_to_add = sdebug_add_host;
6779 sdebug_add_host = 0;
6780
6781 for (k = 0; k < hosts_to_add; k++) {
6782 if (want_store && k == 0) {
6783 ret = sdebug_add_host_helper(idx);
6784 if (ret < 0) {
6785 pr_err("add_host_helper k=%d, error=%d\n",
6786 k, -ret);
6787 break;
6788 }
6789 } else {
6790 ret = sdebug_do_add_host(want_store &&
6791 sdebug_per_host_store);
6792 if (ret < 0) {
6793 pr_err("add_host k=%d error=%d\n", k, -ret);
6794 break;
6795 }
6796 }
6797 }
6798 if (sdebug_verbose)
6799 pr_info("built %d host(s)\n", sdebug_num_hosts);
6800
6801 return 0;
6802
6803bus_unreg:
6804 bus_unregister(&pseudo_lld_bus);
6805dev_unreg:
6806 root_device_unregister(pseudo_primary);
6807free_vm:
6808 sdebug_erase_store(idx, NULL);
6809free_q_arr:
6810 kfree(sdebug_q_arr);
6811 return ret;
6812}
6813
6814static void __exit scsi_debug_exit(void)
6815{
6816 int k = sdebug_num_hosts;
6817
6818 stop_all_queued();
6819 for (; k; k--)
6820 sdebug_do_remove_host(true);
6821 free_all_queued();
6822 driver_unregister(&sdebug_driverfs_driver);
6823 bus_unregister(&pseudo_lld_bus);
6824 root_device_unregister(pseudo_primary);
6825
6826 sdebug_erase_all_stores(false);
6827 xa_destroy(per_store_ap);
6828}
6829
6830device_initcall(scsi_debug_init);
6831module_exit(scsi_debug_exit);
6832
6833static void sdebug_release_adapter(struct device *dev)
6834{
6835 struct sdebug_host_info *sdbg_host;
6836
6837 sdbg_host = to_sdebug_host(dev);
6838 kfree(sdbg_host);
6839}
6840
6841/* idx must be valid, if sip is NULL then it will be obtained using idx */
6842static void sdebug_erase_store(int idx, struct sdeb_store_info *sip)
6843{
6844 if (idx < 0)
6845 return;
6846 if (!sip) {
6847 if (xa_empty(per_store_ap))
6848 return;
6849 sip = xa_load(per_store_ap, idx);
6850 if (!sip)
6851 return;
6852 }
6853 vfree(sip->map_storep);
6854 vfree(sip->dif_storep);
6855 vfree(sip->storep);
6856 xa_erase(per_store_ap, idx);
6857 kfree(sip);
6858}
6859
6860/* Assume apart_from_first==false only in shutdown case. */
6861static void sdebug_erase_all_stores(bool apart_from_first)
6862{
6863 unsigned long idx;
6864 struct sdeb_store_info *sip = NULL;
6865
6866 xa_for_each(per_store_ap, idx, sip) {
6867 if (apart_from_first)
6868 apart_from_first = false;
6869 else
6870 sdebug_erase_store(idx, sip);
6871 }
6872 if (apart_from_first)
6873 sdeb_most_recent_idx = sdeb_first_idx;
6874}
6875
6876/*
6877 * Returns store xarray new element index (idx) if >=0 else negated errno.
6878 * Limit the number of stores to 65536.
6879 */
6880static int sdebug_add_store(void)
6881{
6882 int res;
6883 u32 n_idx;
6884 unsigned long iflags;
6885 unsigned long sz = (unsigned long)sdebug_dev_size_mb * 1048576;
6886 struct sdeb_store_info *sip = NULL;
6887 struct xa_limit xal = { .max = 1 << 16, .min = 0 };
6888
6889 sip = kzalloc(sizeof(*sip), GFP_KERNEL);
6890 if (!sip)
6891 return -ENOMEM;
6892
6893 xa_lock_irqsave(per_store_ap, iflags);
6894 res = __xa_alloc(per_store_ap, &n_idx, sip, xal, GFP_ATOMIC);
6895 if (unlikely(res < 0)) {
6896 xa_unlock_irqrestore(per_store_ap, iflags);
6897 kfree(sip);
6898 pr_warn("%s: xa_alloc() errno=%d\n", __func__, -res);
6899 return res;
6900 }
6901 sdeb_most_recent_idx = n_idx;
6902 if (sdeb_first_idx < 0)
6903 sdeb_first_idx = n_idx;
6904 xa_unlock_irqrestore(per_store_ap, iflags);
6905
6906 res = -ENOMEM;
6907 sip->storep = vzalloc(sz);
6908 if (!sip->storep) {
6909 pr_err("user data oom\n");
6910 goto err;
6911 }
6912 if (sdebug_num_parts > 0)
6913 sdebug_build_parts(sip->storep, sz);
6914
6915 /* DIF/DIX: what T10 calls Protection Information (PI) */
6916 if (sdebug_dix) {
6917 int dif_size;
6918
6919 dif_size = sdebug_store_sectors * sizeof(struct t10_pi_tuple);
6920 sip->dif_storep = vmalloc(dif_size);
6921
6922 pr_info("dif_storep %u bytes @ %pK\n", dif_size,
6923 sip->dif_storep);
6924
6925 if (!sip->dif_storep) {
6926 pr_err("DIX oom\n");
6927 goto err;
6928 }
6929 memset(sip->dif_storep, 0xff, dif_size);
6930 }
6931 /* Logical Block Provisioning */
6932 if (scsi_debug_lbp()) {
6933 map_size = lba_to_map_index(sdebug_store_sectors - 1) + 1;
6934 sip->map_storep = vmalloc(array_size(sizeof(long),
6935 BITS_TO_LONGS(map_size)));
6936
6937 pr_info("%lu provisioning blocks\n", map_size);
6938
6939 if (!sip->map_storep) {
6940 pr_err("LBP map oom\n");
6941 goto err;
6942 }
6943
6944 bitmap_zero(sip->map_storep, map_size);
6945
6946 /* Map first 1KB for partition table */
6947 if (sdebug_num_parts)
6948 map_region(sip, 0, 2);
6949 }
6950
6951 rwlock_init(&sip->macc_lck);
6952 return (int)n_idx;
6953err:
6954 sdebug_erase_store((int)n_idx, sip);
6955 pr_warn("%s: failed, errno=%d\n", __func__, -res);
6956 return res;
6957}
6958
6959static int sdebug_add_host_helper(int per_host_idx)
6960{
6961 int k, devs_per_host, idx;
6962 int error = -ENOMEM;
6963 struct sdebug_host_info *sdbg_host;
6964 struct sdebug_dev_info *sdbg_devinfo, *tmp;
6965
6966 sdbg_host = kzalloc(sizeof(*sdbg_host), GFP_KERNEL);
6967 if (!sdbg_host)
6968 return -ENOMEM;
6969 idx = (per_host_idx < 0) ? sdeb_first_idx : per_host_idx;
6970 if (xa_get_mark(per_store_ap, idx, SDEB_XA_NOT_IN_USE))
6971 xa_clear_mark(per_store_ap, idx, SDEB_XA_NOT_IN_USE);
6972 sdbg_host->si_idx = idx;
6973
6974 INIT_LIST_HEAD(&sdbg_host->dev_info_list);
6975
6976 devs_per_host = sdebug_num_tgts * sdebug_max_luns;
6977 for (k = 0; k < devs_per_host; k++) {
6978 sdbg_devinfo = sdebug_device_create(sdbg_host, GFP_KERNEL);
6979 if (!sdbg_devinfo)
6980 goto clean;
6981 }
6982
6983 spin_lock(&sdebug_host_list_lock);
6984 list_add_tail(&sdbg_host->host_list, &sdebug_host_list);
6985 spin_unlock(&sdebug_host_list_lock);
6986
6987 sdbg_host->dev.bus = &pseudo_lld_bus;
6988 sdbg_host->dev.parent = pseudo_primary;
6989 sdbg_host->dev.release = &sdebug_release_adapter;
6990 dev_set_name(&sdbg_host->dev, "adapter%d", sdebug_num_hosts);
6991
6992 error = device_register(&sdbg_host->dev);
6993 if (error)
6994 goto clean;
6995
6996 ++sdebug_num_hosts;
6997 return 0;
6998
6999clean:
7000 list_for_each_entry_safe(sdbg_devinfo, tmp, &sdbg_host->dev_info_list,
7001 dev_list) {
7002 list_del(&sdbg_devinfo->dev_list);
7003 kfree(sdbg_devinfo->zstate);
7004 kfree(sdbg_devinfo);
7005 }
7006 kfree(sdbg_host);
7007 pr_warn("%s: failed, errno=%d\n", __func__, -error);
7008 return error;
7009}
7010
7011static int sdebug_do_add_host(bool mk_new_store)
7012{
7013 int ph_idx = sdeb_most_recent_idx;
7014
7015 if (mk_new_store) {
7016 ph_idx = sdebug_add_store();
7017 if (ph_idx < 0)
7018 return ph_idx;
7019 }
7020 return sdebug_add_host_helper(ph_idx);
7021}
7022
7023static void sdebug_do_remove_host(bool the_end)
7024{
7025 int idx = -1;
7026 struct sdebug_host_info *sdbg_host = NULL;
7027 struct sdebug_host_info *sdbg_host2;
7028
7029 spin_lock(&sdebug_host_list_lock);
7030 if (!list_empty(&sdebug_host_list)) {
7031 sdbg_host = list_entry(sdebug_host_list.prev,
7032 struct sdebug_host_info, host_list);
7033 idx = sdbg_host->si_idx;
7034 }
7035 if (!the_end && idx >= 0) {
7036 bool unique = true;
7037
7038 list_for_each_entry(sdbg_host2, &sdebug_host_list, host_list) {
7039 if (sdbg_host2 == sdbg_host)
7040 continue;
7041 if (idx == sdbg_host2->si_idx) {
7042 unique = false;
7043 break;
7044 }
7045 }
7046 if (unique) {
7047 xa_set_mark(per_store_ap, idx, SDEB_XA_NOT_IN_USE);
7048 if (idx == sdeb_most_recent_idx)
7049 --sdeb_most_recent_idx;
7050 }
7051 }
7052 if (sdbg_host)
7053 list_del(&sdbg_host->host_list);
7054 spin_unlock(&sdebug_host_list_lock);
7055
7056 if (!sdbg_host)
7057 return;
7058
7059 device_unregister(&sdbg_host->dev);
7060 --sdebug_num_hosts;
7061}
7062
7063static int sdebug_change_qdepth(struct scsi_device *sdev, int qdepth)
7064{
7065 int num_in_q = 0;
7066 struct sdebug_dev_info *devip;
7067
7068 block_unblock_all_queues(true);
7069 devip = (struct sdebug_dev_info *)sdev->hostdata;
7070 if (NULL == devip) {
7071 block_unblock_all_queues(false);
7072 return -ENODEV;
7073 }
7074 num_in_q = atomic_read(&devip->num_in_q);
7075
7076 if (qdepth < 1)
7077 qdepth = 1;
7078 /* allow to exceed max host qc_arr elements for testing */
7079 if (qdepth > SDEBUG_CANQUEUE + 10)
7080 qdepth = SDEBUG_CANQUEUE + 10;
7081 scsi_change_queue_depth(sdev, qdepth);
7082
7083 if (SDEBUG_OPT_Q_NOISE & sdebug_opts) {
7084 sdev_printk(KERN_INFO, sdev, "%s: qdepth=%d, num_in_q=%d\n",
7085 __func__, qdepth, num_in_q);
7086 }
7087 block_unblock_all_queues(false);
7088 return sdev->queue_depth;
7089}
7090
7091static bool fake_timeout(struct scsi_cmnd *scp)
7092{
7093 if (0 == (atomic_read(&sdebug_cmnd_count) % abs(sdebug_every_nth))) {
7094 if (sdebug_every_nth < -1)
7095 sdebug_every_nth = -1;
7096 if (SDEBUG_OPT_TIMEOUT & sdebug_opts)
7097 return true; /* ignore command causing timeout */
7098 else if (SDEBUG_OPT_MAC_TIMEOUT & sdebug_opts &&
7099 scsi_medium_access_command(scp))
7100 return true; /* time out reads and writes */
7101 }
7102 return false;
7103}
7104
7105/* Response to TUR or media access command when device stopped */
7106static int resp_not_ready(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
7107{
7108 int stopped_state;
7109 u64 diff_ns = 0;
7110 ktime_t now_ts = ktime_get_boottime();
7111 struct scsi_device *sdp = scp->device;
7112
7113 stopped_state = atomic_read(&devip->stopped);
7114 if (stopped_state == 2) {
7115 if (ktime_to_ns(now_ts) > ktime_to_ns(devip->create_ts)) {
7116 diff_ns = ktime_to_ns(ktime_sub(now_ts, devip->create_ts));
7117 if (diff_ns >= ((u64)sdeb_tur_ms_to_ready * 1000000)) {
7118 /* tur_ms_to_ready timer extinguished */
7119 atomic_set(&devip->stopped, 0);
7120 return 0;
7121 }
7122 }
7123 mk_sense_buffer(scp, NOT_READY, LOGICAL_UNIT_NOT_READY, 0x1);
7124 if (sdebug_verbose)
7125 sdev_printk(KERN_INFO, sdp,
7126 "%s: Not ready: in process of becoming ready\n", my_name);
7127 if (scp->cmnd[0] == TEST_UNIT_READY) {
7128 u64 tur_nanosecs_to_ready = (u64)sdeb_tur_ms_to_ready * 1000000;
7129
7130 if (diff_ns <= tur_nanosecs_to_ready)
7131 diff_ns = tur_nanosecs_to_ready - diff_ns;
7132 else
7133 diff_ns = tur_nanosecs_to_ready;
7134 /* As per 20-061r2 approved for spc6 by T10 on 20200716 */
7135 do_div(diff_ns, 1000000); /* diff_ns becomes milliseconds */
7136 scsi_set_sense_information(scp->sense_buffer, SCSI_SENSE_BUFFERSIZE,
7137 diff_ns);
7138 return check_condition_result;
7139 }
7140 }
7141 mk_sense_buffer(scp, NOT_READY, LOGICAL_UNIT_NOT_READY, 0x2);
7142 if (sdebug_verbose)
7143 sdev_printk(KERN_INFO, sdp, "%s: Not ready: initializing command required\n",
7144 my_name);
7145 return check_condition_result;
7146}
7147
7148static int scsi_debug_queuecommand(struct Scsi_Host *shost,
7149 struct scsi_cmnd *scp)
7150{
7151 u8 sdeb_i;
7152 struct scsi_device *sdp = scp->device;
7153 const struct opcode_info_t *oip;
7154 const struct opcode_info_t *r_oip;
7155 struct sdebug_dev_info *devip;
7156 u8 *cmd = scp->cmnd;
7157 int (*r_pfp)(struct scsi_cmnd *, struct sdebug_dev_info *);
7158 int (*pfp)(struct scsi_cmnd *, struct sdebug_dev_info *) = NULL;
7159 int k, na;
7160 int errsts = 0;
7161 u32 flags;
7162 u16 sa;
7163 u8 opcode = cmd[0];
7164 bool has_wlun_rl;
7165 bool inject_now;
7166
7167 scsi_set_resid(scp, 0);
7168 if (sdebug_statistics) {
7169 atomic_inc(&sdebug_cmnd_count);
7170 inject_now = inject_on_this_cmd();
7171 } else {
7172 inject_now = false;
7173 }
7174 if (unlikely(sdebug_verbose &&
7175 !(SDEBUG_OPT_NO_CDB_NOISE & sdebug_opts))) {
7176 char b[120];
7177 int n, len, sb;
7178
7179 len = scp->cmd_len;
7180 sb = (int)sizeof(b);
7181 if (len > 32)
7182 strcpy(b, "too long, over 32 bytes");
7183 else {
7184 for (k = 0, n = 0; k < len && n < sb; ++k)
7185 n += scnprintf(b + n, sb - n, "%02x ",
7186 (u32)cmd[k]);
7187 }
7188 sdev_printk(KERN_INFO, sdp, "%s: tag=%#x, cmd %s\n", my_name,
7189 blk_mq_unique_tag(scp->request), b);
7190 }
7191 if (unlikely(inject_now && (sdebug_opts & SDEBUG_OPT_HOST_BUSY)))
7192 return SCSI_MLQUEUE_HOST_BUSY;
7193 has_wlun_rl = (sdp->lun == SCSI_W_LUN_REPORT_LUNS);
7194 if (unlikely((sdp->lun >= sdebug_max_luns) && !has_wlun_rl))
7195 goto err_out;
7196
7197 sdeb_i = opcode_ind_arr[opcode]; /* fully mapped */
7198 oip = &opcode_info_arr[sdeb_i]; /* safe if table consistent */
7199 devip = (struct sdebug_dev_info *)sdp->hostdata;
7200 if (unlikely(!devip)) {
7201 devip = find_build_dev_info(sdp);
7202 if (NULL == devip)
7203 goto err_out;
7204 }
7205 if (unlikely(inject_now && !atomic_read(&sdeb_inject_pending)))
7206 atomic_set(&sdeb_inject_pending, 1);
7207
7208 na = oip->num_attached;
7209 r_pfp = oip->pfp;
7210 if (na) { /* multiple commands with this opcode */
7211 r_oip = oip;
7212 if (FF_SA & r_oip->flags) {
7213 if (F_SA_LOW & oip->flags)
7214 sa = 0x1f & cmd[1];
7215 else
7216 sa = get_unaligned_be16(cmd + 8);
7217 for (k = 0; k <= na; oip = r_oip->arrp + k++) {
7218 if (opcode == oip->opcode && sa == oip->sa)
7219 break;
7220 }
7221 } else { /* since no service action only check opcode */
7222 for (k = 0; k <= na; oip = r_oip->arrp + k++) {
7223 if (opcode == oip->opcode)
7224 break;
7225 }
7226 }
7227 if (k > na) {
7228 if (F_SA_LOW & r_oip->flags)
7229 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 4);
7230 else if (F_SA_HIGH & r_oip->flags)
7231 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 8, 7);
7232 else
7233 mk_sense_invalid_opcode(scp);
7234 goto check_cond;
7235 }
7236 } /* else (when na==0) we assume the oip is a match */
7237 flags = oip->flags;
7238 if (unlikely(F_INV_OP & flags)) {
7239 mk_sense_invalid_opcode(scp);
7240 goto check_cond;
7241 }
7242 if (unlikely(has_wlun_rl && !(F_RL_WLUN_OK & flags))) {
7243 if (sdebug_verbose)
7244 sdev_printk(KERN_INFO, sdp, "%s: Opcode 0x%x not%s\n",
7245 my_name, opcode, " supported for wlun");
7246 mk_sense_invalid_opcode(scp);
7247 goto check_cond;
7248 }
7249 if (unlikely(sdebug_strict)) { /* check cdb against mask */
7250 u8 rem;
7251 int j;
7252
7253 for (k = 1; k < oip->len_mask[0] && k < 16; ++k) {
7254 rem = ~oip->len_mask[k] & cmd[k];
7255 if (rem) {
7256 for (j = 7; j >= 0; --j, rem <<= 1) {
7257 if (0x80 & rem)
7258 break;
7259 }
7260 mk_sense_invalid_fld(scp, SDEB_IN_CDB, k, j);
7261 goto check_cond;
7262 }
7263 }
7264 }
7265 if (unlikely(!(F_SKIP_UA & flags) &&
7266 find_first_bit(devip->uas_bm,
7267 SDEBUG_NUM_UAS) != SDEBUG_NUM_UAS)) {
7268 errsts = make_ua(scp, devip);
7269 if (errsts)
7270 goto check_cond;
7271 }
7272 if (unlikely(((F_M_ACCESS & flags) || scp->cmnd[0] == TEST_UNIT_READY) &&
7273 atomic_read(&devip->stopped))) {
7274 errsts = resp_not_ready(scp, devip);
7275 if (errsts)
7276 goto fini;
7277 }
7278 if (sdebug_fake_rw && (F_FAKE_RW & flags))
7279 goto fini;
7280 if (unlikely(sdebug_every_nth)) {
7281 if (fake_timeout(scp))
7282 return 0; /* ignore command: make trouble */
7283 }
7284 if (likely(oip->pfp))
7285 pfp = oip->pfp; /* calls a resp_* function */
7286 else
7287 pfp = r_pfp; /* if leaf function ptr NULL, try the root's */
7288
7289fini:
7290 if (F_DELAY_OVERR & flags) /* cmds like INQUIRY respond asap */
7291 return schedule_resp(scp, devip, errsts, pfp, 0, 0);
7292 else if ((flags & F_LONG_DELAY) && (sdebug_jdelay > 0 ||
7293 sdebug_ndelay > 10000)) {
7294 /*
7295 * Skip long delays if ndelay <= 10 microseconds. Otherwise
7296 * for Start Stop Unit (SSU) want at least 1 second delay and
7297 * if sdebug_jdelay>1 want a long delay of that many seconds.
7298 * For Synchronize Cache want 1/20 of SSU's delay.
7299 */
7300 int jdelay = (sdebug_jdelay < 2) ? 1 : sdebug_jdelay;
7301 int denom = (flags & F_SYNC_DELAY) ? 20 : 1;
7302
7303 jdelay = mult_frac(USER_HZ * jdelay, HZ, denom * USER_HZ);
7304 return schedule_resp(scp, devip, errsts, pfp, jdelay, 0);
7305 } else
7306 return schedule_resp(scp, devip, errsts, pfp, sdebug_jdelay,
7307 sdebug_ndelay);
7308check_cond:
7309 return schedule_resp(scp, devip, check_condition_result, NULL, 0, 0);
7310err_out:
7311 return schedule_resp(scp, NULL, DID_NO_CONNECT << 16, NULL, 0, 0);
7312}
7313
7314static struct scsi_host_template sdebug_driver_template = {
7315 .show_info = scsi_debug_show_info,
7316 .write_info = scsi_debug_write_info,
7317 .proc_name = sdebug_proc_name,
7318 .name = "SCSI DEBUG",
7319 .info = scsi_debug_info,
7320 .slave_alloc = scsi_debug_slave_alloc,
7321 .slave_configure = scsi_debug_slave_configure,
7322 .slave_destroy = scsi_debug_slave_destroy,
7323 .ioctl = scsi_debug_ioctl,
7324 .queuecommand = scsi_debug_queuecommand,
7325 .change_queue_depth = sdebug_change_qdepth,
7326 .eh_abort_handler = scsi_debug_abort,
7327 .eh_device_reset_handler = scsi_debug_device_reset,
7328 .eh_target_reset_handler = scsi_debug_target_reset,
7329 .eh_bus_reset_handler = scsi_debug_bus_reset,
7330 .eh_host_reset_handler = scsi_debug_host_reset,
7331 .can_queue = SDEBUG_CANQUEUE,
7332 .this_id = 7,
7333 .sg_tablesize = SG_MAX_SEGMENTS,
7334 .cmd_per_lun = DEF_CMD_PER_LUN,
7335 .max_sectors = -1U,
7336 .max_segment_size = -1U,
7337 .module = THIS_MODULE,
7338 .track_queue_depth = 1,
7339};
7340
7341static int sdebug_driver_probe(struct device *dev)
7342{
7343 int error = 0;
7344 struct sdebug_host_info *sdbg_host;
7345 struct Scsi_Host *hpnt;
7346 int hprot;
7347
7348 sdbg_host = to_sdebug_host(dev);
7349
7350 if (sdebug_host_max_queue)
7351 sdebug_driver_template.can_queue = sdebug_host_max_queue;
7352 else
7353 sdebug_driver_template.can_queue = sdebug_max_queue;
7354 if (!sdebug_clustering)
7355 sdebug_driver_template.dma_boundary = PAGE_SIZE - 1;
7356
7357 hpnt = scsi_host_alloc(&sdebug_driver_template, sizeof(sdbg_host));
7358 if (NULL == hpnt) {
7359 pr_err("scsi_host_alloc failed\n");
7360 error = -ENODEV;
7361 return error;
7362 }
7363 if (submit_queues > nr_cpu_ids) {
7364 pr_warn("%s: trim submit_queues (was %d) to nr_cpu_ids=%u\n",
7365 my_name, submit_queues, nr_cpu_ids);
7366 submit_queues = nr_cpu_ids;
7367 }
7368 /*
7369 * Decide whether to tell scsi subsystem that we want mq. The
7370 * following should give the same answer for each host. If the host
7371 * has a limit of hostwide max commands, then do not set.
7372 */
7373 if (!sdebug_host_max_queue)
7374 hpnt->nr_hw_queues = submit_queues;
7375
7376 sdbg_host->shost = hpnt;
7377 *((struct sdebug_host_info **)hpnt->hostdata) = sdbg_host;
7378 if ((hpnt->this_id >= 0) && (sdebug_num_tgts > hpnt->this_id))
7379 hpnt->max_id = sdebug_num_tgts + 1;
7380 else
7381 hpnt->max_id = sdebug_num_tgts;
7382 /* = sdebug_max_luns; */
7383 hpnt->max_lun = SCSI_W_LUN_REPORT_LUNS + 1;
7384
7385 hprot = 0;
7386
7387 switch (sdebug_dif) {
7388
7389 case T10_PI_TYPE1_PROTECTION:
7390 hprot = SHOST_DIF_TYPE1_PROTECTION;
7391 if (sdebug_dix)
7392 hprot |= SHOST_DIX_TYPE1_PROTECTION;
7393 break;
7394
7395 case T10_PI_TYPE2_PROTECTION:
7396 hprot = SHOST_DIF_TYPE2_PROTECTION;
7397 if (sdebug_dix)
7398 hprot |= SHOST_DIX_TYPE2_PROTECTION;
7399 break;
7400
7401 case T10_PI_TYPE3_PROTECTION:
7402 hprot = SHOST_DIF_TYPE3_PROTECTION;
7403 if (sdebug_dix)
7404 hprot |= SHOST_DIX_TYPE3_PROTECTION;
7405 break;
7406
7407 default:
7408 if (sdebug_dix)
7409 hprot |= SHOST_DIX_TYPE0_PROTECTION;
7410 break;
7411 }
7412
7413 scsi_host_set_prot(hpnt, hprot);
7414
7415 if (have_dif_prot || sdebug_dix)
7416 pr_info("host protection%s%s%s%s%s%s%s\n",
7417 (hprot & SHOST_DIF_TYPE1_PROTECTION) ? " DIF1" : "",
7418 (hprot & SHOST_DIF_TYPE2_PROTECTION) ? " DIF2" : "",
7419 (hprot & SHOST_DIF_TYPE3_PROTECTION) ? " DIF3" : "",
7420 (hprot & SHOST_DIX_TYPE0_PROTECTION) ? " DIX0" : "",
7421 (hprot & SHOST_DIX_TYPE1_PROTECTION) ? " DIX1" : "",
7422 (hprot & SHOST_DIX_TYPE2_PROTECTION) ? " DIX2" : "",
7423 (hprot & SHOST_DIX_TYPE3_PROTECTION) ? " DIX3" : "");
7424
7425 if (sdebug_guard == 1)
7426 scsi_host_set_guard(hpnt, SHOST_DIX_GUARD_IP);
7427 else
7428 scsi_host_set_guard(hpnt, SHOST_DIX_GUARD_CRC);
7429
7430 sdebug_verbose = !!(SDEBUG_OPT_NOISE & sdebug_opts);
7431 sdebug_any_injecting_opt = !!(SDEBUG_OPT_ALL_INJECTING & sdebug_opts);
7432 if (sdebug_every_nth) /* need stats counters for every_nth */
7433 sdebug_statistics = true;
7434 error = scsi_add_host(hpnt, &sdbg_host->dev);
7435 if (error) {
7436 pr_err("scsi_add_host failed\n");
7437 error = -ENODEV;
7438 scsi_host_put(hpnt);
7439 } else {
7440 scsi_scan_host(hpnt);
7441 }
7442
7443 return error;
7444}
7445
7446static int sdebug_driver_remove(struct device *dev)
7447{
7448 struct sdebug_host_info *sdbg_host;
7449 struct sdebug_dev_info *sdbg_devinfo, *tmp;
7450
7451 sdbg_host = to_sdebug_host(dev);
7452
7453 if (!sdbg_host) {
7454 pr_err("Unable to locate host info\n");
7455 return -ENODEV;
7456 }
7457
7458 scsi_remove_host(sdbg_host->shost);
7459
7460 list_for_each_entry_safe(sdbg_devinfo, tmp, &sdbg_host->dev_info_list,
7461 dev_list) {
7462 list_del(&sdbg_devinfo->dev_list);
7463 kfree(sdbg_devinfo->zstate);
7464 kfree(sdbg_devinfo);
7465 }
7466
7467 scsi_host_put(sdbg_host->shost);
7468 return 0;
7469}
7470
7471static int pseudo_lld_bus_match(struct device *dev,
7472 struct device_driver *dev_driver)
7473{
7474 return 1;
7475}
7476
7477static struct bus_type pseudo_lld_bus = {
7478 .name = "pseudo",
7479 .match = pseudo_lld_bus_match,
7480 .probe = sdebug_driver_probe,
7481 .remove = sdebug_driver_remove,
7482 .drv_groups = sdebug_drv_groups,
7483};