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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 - 2018 Douglas Gilbert
11 *
12 * For documentation see http://sg.danny.cz/sg/sdebug26.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
42#include <net/checksum.h>
43
44#include <asm/unaligned.h>
45
46#include <scsi/scsi.h>
47#include <scsi/scsi_cmnd.h>
48#include <scsi/scsi_device.h>
49#include <scsi/scsi_host.h>
50#include <scsi/scsicam.h>
51#include <scsi/scsi_eh.h>
52#include <scsi/scsi_tcq.h>
53#include <scsi/scsi_dbg.h>
54
55#include "sd.h"
56#include "scsi_logging.h"
57
58/* make sure inq_product_rev string corresponds to this version */
59#define SDEBUG_VERSION "0188" /* format to fit INQUIRY revision field */
60static const char *sdebug_version_date = "20190125";
61
62#define MY_NAME "scsi_debug"
63
64/* Additional Sense Code (ASC) */
65#define NO_ADDITIONAL_SENSE 0x0
66#define LOGICAL_UNIT_NOT_READY 0x4
67#define LOGICAL_UNIT_COMMUNICATION_FAILURE 0x8
68#define UNRECOVERED_READ_ERR 0x11
69#define PARAMETER_LIST_LENGTH_ERR 0x1a
70#define INVALID_OPCODE 0x20
71#define LBA_OUT_OF_RANGE 0x21
72#define INVALID_FIELD_IN_CDB 0x24
73#define INVALID_FIELD_IN_PARAM_LIST 0x26
74#define WRITE_PROTECTED 0x27
75#define UA_RESET_ASC 0x29
76#define UA_CHANGED_ASC 0x2a
77#define TARGET_CHANGED_ASC 0x3f
78#define LUNS_CHANGED_ASCQ 0x0e
79#define INSUFF_RES_ASC 0x55
80#define INSUFF_RES_ASCQ 0x3
81#define POWER_ON_RESET_ASCQ 0x0
82#define BUS_RESET_ASCQ 0x2 /* scsi bus reset occurred */
83#define MODE_CHANGED_ASCQ 0x1 /* mode parameters changed */
84#define CAPACITY_CHANGED_ASCQ 0x9
85#define SAVING_PARAMS_UNSUP 0x39
86#define TRANSPORT_PROBLEM 0x4b
87#define THRESHOLD_EXCEEDED 0x5d
88#define LOW_POWER_COND_ON 0x5e
89#define MISCOMPARE_VERIFY_ASC 0x1d
90#define MICROCODE_CHANGED_ASCQ 0x1 /* with TARGET_CHANGED_ASC */
91#define MICROCODE_CHANGED_WO_RESET_ASCQ 0x16
92#define WRITE_ERROR_ASC 0xc
93
94/* Additional Sense Code Qualifier (ASCQ) */
95#define ACK_NAK_TO 0x3
96
97/* Default values for driver parameters */
98#define DEF_NUM_HOST 1
99#define DEF_NUM_TGTS 1
100#define DEF_MAX_LUNS 1
101/* With these defaults, this driver will make 1 host with 1 target
102 * (id 0) containing 1 logical unit (lun 0). That is 1 device.
103 */
104#define DEF_ATO 1
105#define DEF_CDB_LEN 10
106#define DEF_JDELAY 1 /* if > 0 unit is a jiffy */
107#define DEF_DEV_SIZE_MB 8
108#define DEF_DIF 0
109#define DEF_DIX 0
110#define DEF_D_SENSE 0
111#define DEF_EVERY_NTH 0
112#define DEF_FAKE_RW 0
113#define DEF_GUARD 0
114#define DEF_HOST_LOCK 0
115#define DEF_LBPU 0
116#define DEF_LBPWS 0
117#define DEF_LBPWS10 0
118#define DEF_LBPRZ 1
119#define DEF_LOWEST_ALIGNED 0
120#define DEF_NDELAY 0 /* if > 0 unit is a nanosecond */
121#define DEF_NO_LUN_0 0
122#define DEF_NUM_PARTS 0
123#define DEF_OPTS 0
124#define DEF_OPT_BLKS 1024
125#define DEF_PHYSBLK_EXP 0
126#define DEF_OPT_XFERLEN_EXP 0
127#define DEF_PTYPE TYPE_DISK
128#define DEF_REMOVABLE false
129#define DEF_SCSI_LEVEL 7 /* INQUIRY, byte2 [6->SPC-4; 7->SPC-5] */
130#define DEF_SECTOR_SIZE 512
131#define DEF_UNMAP_ALIGNMENT 0
132#define DEF_UNMAP_GRANULARITY 1
133#define DEF_UNMAP_MAX_BLOCKS 0xFFFFFFFF
134#define DEF_UNMAP_MAX_DESC 256
135#define DEF_VIRTUAL_GB 0
136#define DEF_VPD_USE_HOSTNO 1
137#define DEF_WRITESAME_LENGTH 0xFFFF
138#define DEF_STRICT 0
139#define DEF_STATISTICS false
140#define DEF_SUBMIT_QUEUES 1
141#define DEF_UUID_CTL 0
142#define JDELAY_OVERRIDDEN -9999
143
144#define SDEBUG_LUN_0_VAL 0
145
146/* bit mask values for sdebug_opts */
147#define SDEBUG_OPT_NOISE 1
148#define SDEBUG_OPT_MEDIUM_ERR 2
149#define SDEBUG_OPT_TIMEOUT 4
150#define SDEBUG_OPT_RECOVERED_ERR 8
151#define SDEBUG_OPT_TRANSPORT_ERR 16
152#define SDEBUG_OPT_DIF_ERR 32
153#define SDEBUG_OPT_DIX_ERR 64
154#define SDEBUG_OPT_MAC_TIMEOUT 128
155#define SDEBUG_OPT_SHORT_TRANSFER 0x100
156#define SDEBUG_OPT_Q_NOISE 0x200
157#define SDEBUG_OPT_ALL_TSF 0x400
158#define SDEBUG_OPT_RARE_TSF 0x800
159#define SDEBUG_OPT_N_WCE 0x1000
160#define SDEBUG_OPT_RESET_NOISE 0x2000
161#define SDEBUG_OPT_NO_CDB_NOISE 0x4000
162#define SDEBUG_OPT_HOST_BUSY 0x8000
163#define SDEBUG_OPT_CMD_ABORT 0x10000
164#define SDEBUG_OPT_ALL_NOISE (SDEBUG_OPT_NOISE | SDEBUG_OPT_Q_NOISE | \
165 SDEBUG_OPT_RESET_NOISE)
166#define SDEBUG_OPT_ALL_INJECTING (SDEBUG_OPT_RECOVERED_ERR | \
167 SDEBUG_OPT_TRANSPORT_ERR | \
168 SDEBUG_OPT_DIF_ERR | SDEBUG_OPT_DIX_ERR | \
169 SDEBUG_OPT_SHORT_TRANSFER | \
170 SDEBUG_OPT_HOST_BUSY | \
171 SDEBUG_OPT_CMD_ABORT)
172/* When "every_nth" > 0 then modulo "every_nth" commands:
173 * - a missing response is simulated if SDEBUG_OPT_TIMEOUT is set
174 * - a RECOVERED_ERROR is simulated on successful read and write
175 * commands if SDEBUG_OPT_RECOVERED_ERR is set.
176 * - a TRANSPORT_ERROR is simulated on successful read and write
177 * commands if SDEBUG_OPT_TRANSPORT_ERR is set.
178 * - similarly for DIF_ERR, DIX_ERR, SHORT_TRANSFER, HOST_BUSY and
179 * CMD_ABORT
180 *
181 * When "every_nth" < 0 then after "- every_nth" commands the selected
182 * error will be injected. The error will be injected on every subsequent
183 * command until some other action occurs; for example, the user writing
184 * a new value (other than -1 or 1) to every_nth:
185 * echo 0 > /sys/bus/pseudo/drivers/scsi_debug/every_nth
186 */
187
188/* As indicated in SAM-5 and SPC-4 Unit Attentions (UAs) are returned in
189 * priority order. In the subset implemented here lower numbers have higher
190 * priority. The UA numbers should be a sequence starting from 0 with
191 * SDEBUG_NUM_UAS being 1 higher than the highest numbered UA. */
192#define SDEBUG_UA_POR 0 /* Power on, reset, or bus device reset */
193#define SDEBUG_UA_BUS_RESET 1
194#define SDEBUG_UA_MODE_CHANGED 2
195#define SDEBUG_UA_CAPACITY_CHANGED 3
196#define SDEBUG_UA_LUNS_CHANGED 4
197#define SDEBUG_UA_MICROCODE_CHANGED 5 /* simulate firmware change */
198#define SDEBUG_UA_MICROCODE_CHANGED_WO_RESET 6
199#define SDEBUG_NUM_UAS 7
200
201/* when 1==SDEBUG_OPT_MEDIUM_ERR, a medium error is simulated at this
202 * sector on read commands: */
203#define OPT_MEDIUM_ERR_ADDR 0x1234 /* that's sector 4660 in decimal */
204#define OPT_MEDIUM_ERR_NUM 10 /* number of consecutive medium errs */
205
206/* If REPORT LUNS has luns >= 256 it can choose "flat space" (value 1)
207 * or "peripheral device" addressing (value 0) */
208#define SAM2_LUN_ADDRESS_METHOD 0
209
210/* SDEBUG_CANQUEUE is the maximum number of commands that can be queued
211 * (for response) per submit queue at one time. Can be reduced by max_queue
212 * option. Command responses are not queued when jdelay=0 and ndelay=0. The
213 * per-device DEF_CMD_PER_LUN can be changed via sysfs:
214 * /sys/class/scsi_device/<h:c:t:l>/device/queue_depth
215 * but cannot exceed SDEBUG_CANQUEUE .
216 */
217#define SDEBUG_CANQUEUE_WORDS 3 /* a WORD is bits in a long */
218#define SDEBUG_CANQUEUE (SDEBUG_CANQUEUE_WORDS * BITS_PER_LONG)
219#define DEF_CMD_PER_LUN 255
220
221#define F_D_IN 1
222#define F_D_OUT 2
223#define F_D_OUT_MAYBE 4 /* WRITE SAME, NDOB bit */
224#define F_D_UNKN 8
225#define F_RL_WLUN_OK 0x10
226#define F_SKIP_UA 0x20
227#define F_DELAY_OVERR 0x40
228#define F_SA_LOW 0x80 /* cdb byte 1, bits 4 to 0 */
229#define F_SA_HIGH 0x100 /* as used by variable length cdbs */
230#define F_INV_OP 0x200
231#define F_FAKE_RW 0x400
232#define F_M_ACCESS 0x800 /* media access */
233#define F_SSU_DELAY 0x1000
234#define F_SYNC_DELAY 0x2000
235
236#define FF_RESPOND (F_RL_WLUN_OK | F_SKIP_UA | F_DELAY_OVERR)
237#define FF_MEDIA_IO (F_M_ACCESS | F_FAKE_RW)
238#define FF_SA (F_SA_HIGH | F_SA_LOW)
239#define F_LONG_DELAY (F_SSU_DELAY | F_SYNC_DELAY)
240
241#define SDEBUG_MAX_PARTS 4
242
243#define SDEBUG_MAX_CMD_LEN 32
244
245
246struct sdebug_dev_info {
247 struct list_head dev_list;
248 unsigned int channel;
249 unsigned int target;
250 u64 lun;
251 uuid_t lu_name;
252 struct sdebug_host_info *sdbg_host;
253 unsigned long uas_bm[1];
254 atomic_t num_in_q;
255 atomic_t stopped;
256 bool used;
257};
258
259struct sdebug_host_info {
260 struct list_head host_list;
261 struct Scsi_Host *shost;
262 struct device dev;
263 struct list_head dev_info_list;
264};
265
266#define to_sdebug_host(d) \
267 container_of(d, struct sdebug_host_info, dev)
268
269enum sdeb_defer_type {SDEB_DEFER_NONE = 0, SDEB_DEFER_HRT = 1,
270 SDEB_DEFER_WQ = 2};
271
272struct sdebug_defer {
273 struct hrtimer hrt;
274 struct execute_work ew;
275 int sqa_idx; /* index of sdebug_queue array */
276 int qc_idx; /* index of sdebug_queued_cmd array within sqa_idx */
277 int issuing_cpu;
278 bool init_hrt;
279 bool init_wq;
280 bool aborted; /* true when blk_abort_request() already called */
281 enum sdeb_defer_type defer_t;
282};
283
284struct sdebug_queued_cmd {
285 /* corresponding bit set in in_use_bm[] in owning struct sdebug_queue
286 * instance indicates this slot is in use.
287 */
288 struct sdebug_defer *sd_dp;
289 struct scsi_cmnd *a_cmnd;
290 unsigned int inj_recovered:1;
291 unsigned int inj_transport:1;
292 unsigned int inj_dif:1;
293 unsigned int inj_dix:1;
294 unsigned int inj_short:1;
295 unsigned int inj_host_busy:1;
296 unsigned int inj_cmd_abort:1;
297};
298
299struct sdebug_queue {
300 struct sdebug_queued_cmd qc_arr[SDEBUG_CANQUEUE];
301 unsigned long in_use_bm[SDEBUG_CANQUEUE_WORDS];
302 spinlock_t qc_lock;
303 atomic_t blocked; /* to temporarily stop more being queued */
304};
305
306static atomic_t sdebug_cmnd_count; /* number of incoming commands */
307static atomic_t sdebug_completions; /* count of deferred completions */
308static atomic_t sdebug_miss_cpus; /* submission + completion cpus differ */
309static atomic_t sdebug_a_tsf; /* 'almost task set full' counter */
310
311struct opcode_info_t {
312 u8 num_attached; /* 0 if this is it (i.e. a leaf); use 0xff */
313 /* for terminating element */
314 u8 opcode; /* if num_attached > 0, preferred */
315 u16 sa; /* service action */
316 u32 flags; /* OR-ed set of SDEB_F_* */
317 int (*pfp)(struct scsi_cmnd *, struct sdebug_dev_info *);
318 const struct opcode_info_t *arrp; /* num_attached elements or NULL */
319 u8 len_mask[16]; /* len_mask[0]-->cdb_len, then mask for cdb */
320 /* 1 to min(cdb_len, 15); ignore cdb[15...] */
321};
322
323/* SCSI opcodes (first byte of cdb) of interest mapped onto these indexes */
324enum sdeb_opcode_index {
325 SDEB_I_INVALID_OPCODE = 0,
326 SDEB_I_INQUIRY = 1,
327 SDEB_I_REPORT_LUNS = 2,
328 SDEB_I_REQUEST_SENSE = 3,
329 SDEB_I_TEST_UNIT_READY = 4,
330 SDEB_I_MODE_SENSE = 5, /* 6, 10 */
331 SDEB_I_MODE_SELECT = 6, /* 6, 10 */
332 SDEB_I_LOG_SENSE = 7,
333 SDEB_I_READ_CAPACITY = 8, /* 10; 16 is in SA_IN(16) */
334 SDEB_I_READ = 9, /* 6, 10, 12, 16 */
335 SDEB_I_WRITE = 10, /* 6, 10, 12, 16 */
336 SDEB_I_START_STOP = 11,
337 SDEB_I_SERV_ACT_IN_16 = 12, /* add ...SERV_ACT_IN_12 if needed */
338 SDEB_I_SERV_ACT_OUT_16 = 13, /* add ...SERV_ACT_OUT_12 if needed */
339 SDEB_I_MAINT_IN = 14,
340 SDEB_I_MAINT_OUT = 15,
341 SDEB_I_VERIFY = 16, /* 10 only */
342 SDEB_I_VARIABLE_LEN = 17, /* READ(32), WRITE(32), WR_SCAT(32) */
343 SDEB_I_RESERVE = 18, /* 6, 10 */
344 SDEB_I_RELEASE = 19, /* 6, 10 */
345 SDEB_I_ALLOW_REMOVAL = 20, /* PREVENT ALLOW MEDIUM REMOVAL */
346 SDEB_I_REZERO_UNIT = 21, /* REWIND in SSC */
347 SDEB_I_ATA_PT = 22, /* 12, 16 */
348 SDEB_I_SEND_DIAG = 23,
349 SDEB_I_UNMAP = 24,
350 SDEB_I_WRITE_BUFFER = 25,
351 SDEB_I_WRITE_SAME = 26, /* 10, 16 */
352 SDEB_I_SYNC_CACHE = 27, /* 10, 16 */
353 SDEB_I_COMP_WRITE = 28,
354 SDEB_I_LAST_ELEMENT = 29, /* keep this last (previous + 1) */
355};
356
357
358static const unsigned char opcode_ind_arr[256] = {
359/* 0x0; 0x0->0x1f: 6 byte cdbs */
360 SDEB_I_TEST_UNIT_READY, SDEB_I_REZERO_UNIT, 0, SDEB_I_REQUEST_SENSE,
361 0, 0, 0, 0,
362 SDEB_I_READ, 0, SDEB_I_WRITE, 0, 0, 0, 0, 0,
363 0, 0, SDEB_I_INQUIRY, 0, 0, SDEB_I_MODE_SELECT, SDEB_I_RESERVE,
364 SDEB_I_RELEASE,
365 0, 0, SDEB_I_MODE_SENSE, SDEB_I_START_STOP, 0, SDEB_I_SEND_DIAG,
366 SDEB_I_ALLOW_REMOVAL, 0,
367/* 0x20; 0x20->0x3f: 10 byte cdbs */
368 0, 0, 0, 0, 0, SDEB_I_READ_CAPACITY, 0, 0,
369 SDEB_I_READ, 0, SDEB_I_WRITE, 0, 0, 0, 0, SDEB_I_VERIFY,
370 0, 0, 0, 0, 0, SDEB_I_SYNC_CACHE, 0, 0,
371 0, 0, 0, SDEB_I_WRITE_BUFFER, 0, 0, 0, 0,
372/* 0x40; 0x40->0x5f: 10 byte cdbs */
373 0, SDEB_I_WRITE_SAME, SDEB_I_UNMAP, 0, 0, 0, 0, 0,
374 0, 0, 0, 0, 0, SDEB_I_LOG_SENSE, 0, 0,
375 0, 0, 0, 0, 0, SDEB_I_MODE_SELECT, SDEB_I_RESERVE,
376 SDEB_I_RELEASE,
377 0, 0, SDEB_I_MODE_SENSE, 0, 0, 0, 0, 0,
378/* 0x60; 0x60->0x7d are reserved, 0x7e is "extended cdb" */
379 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
380 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
381 0, SDEB_I_VARIABLE_LEN,
382/* 0x80; 0x80->0x9f: 16 byte cdbs */
383 0, 0, 0, 0, 0, SDEB_I_ATA_PT, 0, 0,
384 SDEB_I_READ, SDEB_I_COMP_WRITE, SDEB_I_WRITE, 0, 0, 0, 0, 0,
385 0, SDEB_I_SYNC_CACHE, 0, SDEB_I_WRITE_SAME, 0, 0, 0, 0,
386 0, 0, 0, 0, 0, 0, SDEB_I_SERV_ACT_IN_16, SDEB_I_SERV_ACT_OUT_16,
387/* 0xa0; 0xa0->0xbf: 12 byte cdbs */
388 SDEB_I_REPORT_LUNS, SDEB_I_ATA_PT, 0, SDEB_I_MAINT_IN,
389 SDEB_I_MAINT_OUT, 0, 0, 0,
390 SDEB_I_READ, 0 /* SDEB_I_SERV_ACT_OUT_12 */, SDEB_I_WRITE,
391 0 /* SDEB_I_SERV_ACT_IN_12 */, 0, 0, 0, 0,
392 0, 0, 0, 0, 0, 0, 0, 0,
393 0, 0, 0, 0, 0, 0, 0, 0,
394/* 0xc0; 0xc0->0xff: vendor specific */
395 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
396 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
397 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
398 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
399};
400
401/*
402 * The following "response" functions return the SCSI mid-level's 4 byte
403 * tuple-in-an-int. To handle commands with an IMMED bit, for a faster
404 * command completion, they can mask their return value with
405 * SDEG_RES_IMMED_MASK .
406 */
407#define SDEG_RES_IMMED_MASK 0x40000000
408
409static int resp_inquiry(struct scsi_cmnd *, struct sdebug_dev_info *);
410static int resp_report_luns(struct scsi_cmnd *, struct sdebug_dev_info *);
411static int resp_requests(struct scsi_cmnd *, struct sdebug_dev_info *);
412static int resp_mode_sense(struct scsi_cmnd *, struct sdebug_dev_info *);
413static int resp_mode_select(struct scsi_cmnd *, struct sdebug_dev_info *);
414static int resp_log_sense(struct scsi_cmnd *, struct sdebug_dev_info *);
415static int resp_readcap(struct scsi_cmnd *, struct sdebug_dev_info *);
416static int resp_read_dt0(struct scsi_cmnd *, struct sdebug_dev_info *);
417static int resp_write_dt0(struct scsi_cmnd *, struct sdebug_dev_info *);
418static int resp_write_scat(struct scsi_cmnd *, struct sdebug_dev_info *);
419static int resp_start_stop(struct scsi_cmnd *, struct sdebug_dev_info *);
420static int resp_readcap16(struct scsi_cmnd *, struct sdebug_dev_info *);
421static int resp_get_lba_status(struct scsi_cmnd *, struct sdebug_dev_info *);
422static int resp_report_tgtpgs(struct scsi_cmnd *, struct sdebug_dev_info *);
423static int resp_unmap(struct scsi_cmnd *, struct sdebug_dev_info *);
424static int resp_rsup_opcodes(struct scsi_cmnd *, struct sdebug_dev_info *);
425static int resp_rsup_tmfs(struct scsi_cmnd *, struct sdebug_dev_info *);
426static int resp_write_same_10(struct scsi_cmnd *, struct sdebug_dev_info *);
427static int resp_write_same_16(struct scsi_cmnd *, struct sdebug_dev_info *);
428static int resp_comp_write(struct scsi_cmnd *, struct sdebug_dev_info *);
429static int resp_write_buffer(struct scsi_cmnd *, struct sdebug_dev_info *);
430static int resp_sync_cache(struct scsi_cmnd *, struct sdebug_dev_info *);
431
432/*
433 * The following are overflow arrays for cdbs that "hit" the same index in
434 * the opcode_info_arr array. The most time sensitive (or commonly used) cdb
435 * should be placed in opcode_info_arr[], the others should be placed here.
436 */
437static const struct opcode_info_t msense_iarr[] = {
438 {0, 0x1a, 0, F_D_IN, NULL, NULL,
439 {6, 0xe8, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
440};
441
442static const struct opcode_info_t mselect_iarr[] = {
443 {0, 0x15, 0, F_D_OUT, NULL, NULL,
444 {6, 0xf1, 0, 0, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
445};
446
447static const struct opcode_info_t read_iarr[] = {
448 {0, 0x28, 0, F_D_IN | FF_MEDIA_IO, resp_read_dt0, NULL,/* READ(10) */
449 {10, 0xff, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xff, 0xff, 0xc7, 0, 0,
450 0, 0, 0, 0} },
451 {0, 0x8, 0, F_D_IN | FF_MEDIA_IO, resp_read_dt0, NULL, /* READ(6) */
452 {6, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
453 {0, 0xa8, 0, F_D_IN | FF_MEDIA_IO, resp_read_dt0, NULL,/* READ(12) */
454 {12, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xbf,
455 0xc7, 0, 0, 0, 0} },
456};
457
458static const struct opcode_info_t write_iarr[] = {
459 {0, 0x2a, 0, F_D_OUT | FF_MEDIA_IO, resp_write_dt0, /* WRITE(10) */
460 NULL, {10, 0xfb, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xff, 0xff, 0xc7,
461 0, 0, 0, 0, 0, 0} },
462 {0, 0xa, 0, F_D_OUT | FF_MEDIA_IO, resp_write_dt0, /* WRITE(6) */
463 NULL, {6, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0,
464 0, 0, 0} },
465 {0, 0xaa, 0, F_D_OUT | FF_MEDIA_IO, resp_write_dt0, /* WRITE(12) */
466 NULL, {12, 0xfb, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
467 0xbf, 0xc7, 0, 0, 0, 0} },
468};
469
470static const struct opcode_info_t sa_in_16_iarr[] = {
471 {0, 0x9e, 0x12, F_SA_LOW | F_D_IN, resp_get_lba_status, NULL,
472 {16, 0x12, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
473 0xff, 0xff, 0xff, 0, 0xc7} }, /* GET LBA STATUS(16) */
474};
475
476static const struct opcode_info_t vl_iarr[] = { /* VARIABLE LENGTH */
477 {0, 0x7f, 0xb, F_SA_HIGH | F_D_OUT | FF_MEDIA_IO, resp_write_dt0,
478 NULL, {32, 0xc7, 0, 0, 0, 0, 0x3f, 0x18, 0x0, 0xb, 0xfa,
479 0, 0xff, 0xff, 0xff, 0xff} }, /* WRITE(32) */
480 {0, 0x7f, 0x11, F_SA_HIGH | F_D_OUT | FF_MEDIA_IO, resp_write_scat,
481 NULL, {32, 0xc7, 0, 0, 0, 0, 0x3f, 0x18, 0x0, 0x11, 0xf8,
482 0, 0xff, 0xff, 0x0, 0x0} }, /* WRITE SCATTERED(32) */
483};
484
485static const struct opcode_info_t maint_in_iarr[] = { /* MAINT IN */
486 {0, 0xa3, 0xc, F_SA_LOW | F_D_IN, resp_rsup_opcodes, NULL,
487 {12, 0xc, 0x87, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0,
488 0xc7, 0, 0, 0, 0} }, /* REPORT SUPPORTED OPERATION CODES */
489 {0, 0xa3, 0xd, F_SA_LOW | F_D_IN, resp_rsup_tmfs, NULL,
490 {12, 0xd, 0x80, 0, 0, 0, 0xff, 0xff, 0xff, 0xff, 0, 0xc7, 0, 0,
491 0, 0} }, /* REPORTED SUPPORTED TASK MANAGEMENT FUNCTIONS */
492};
493
494static const struct opcode_info_t write_same_iarr[] = {
495 {0, 0x93, 0, F_D_OUT_MAYBE | FF_MEDIA_IO, resp_write_same_16, NULL,
496 {16, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
497 0xff, 0xff, 0xff, 0x3f, 0xc7} }, /* WRITE SAME(16) */
498};
499
500static const struct opcode_info_t reserve_iarr[] = {
501 {0, 0x16, 0, F_D_OUT, NULL, NULL, /* RESERVE(6) */
502 {6, 0x1f, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
503};
504
505static const struct opcode_info_t release_iarr[] = {
506 {0, 0x17, 0, F_D_OUT, NULL, NULL, /* RELEASE(6) */
507 {6, 0x1f, 0xff, 0, 0, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
508};
509
510static const struct opcode_info_t sync_cache_iarr[] = {
511 {0, 0x91, 0, F_SYNC_DELAY | F_M_ACCESS, resp_sync_cache, NULL,
512 {16, 0x6, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
513 0xff, 0xff, 0xff, 0xff, 0x3f, 0xc7} }, /* SYNC_CACHE (16) */
514};
515
516
517/* This array is accessed via SDEB_I_* values. Make sure all are mapped,
518 * plus the terminating elements for logic that scans this table such as
519 * REPORT SUPPORTED OPERATION CODES. */
520static const struct opcode_info_t opcode_info_arr[SDEB_I_LAST_ELEMENT + 1] = {
521/* 0 */
522 {0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL, /* unknown opcodes */
523 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
524 {0, 0x12, 0, FF_RESPOND | F_D_IN, resp_inquiry, NULL, /* INQUIRY */
525 {6, 0xe3, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
526 {0, 0xa0, 0, FF_RESPOND | F_D_IN, resp_report_luns, NULL,
527 {12, 0xe3, 0xff, 0, 0, 0, 0xff, 0xff, 0xff, 0xff, 0, 0xc7, 0, 0,
528 0, 0} }, /* REPORT LUNS */
529 {0, 0x3, 0, FF_RESPOND | F_D_IN, resp_requests, NULL,
530 {6, 0xe1, 0, 0, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
531 {0, 0x0, 0, F_M_ACCESS | F_RL_WLUN_OK, NULL, NULL,/* TEST UNIT READY */
532 {6, 0, 0, 0, 0, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
533/* 5 */
534 {ARRAY_SIZE(msense_iarr), 0x5a, 0, F_D_IN, /* MODE SENSE(10) */
535 resp_mode_sense, msense_iarr, {10, 0xf8, 0xff, 0xff, 0, 0, 0,
536 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0} },
537 {ARRAY_SIZE(mselect_iarr), 0x55, 0, F_D_OUT, /* MODE SELECT(10) */
538 resp_mode_select, mselect_iarr, {10, 0xf1, 0, 0, 0, 0, 0, 0xff,
539 0xff, 0xc7, 0, 0, 0, 0, 0, 0} },
540 {0, 0x4d, 0, F_D_IN, resp_log_sense, NULL, /* LOG SENSE */
541 {10, 0xe3, 0xff, 0xff, 0, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0,
542 0, 0, 0} },
543 {0, 0x25, 0, F_D_IN, resp_readcap, NULL, /* READ CAPACITY(10) */
544 {10, 0xe1, 0xff, 0xff, 0xff, 0xff, 0, 0, 0x1, 0xc7, 0, 0, 0, 0,
545 0, 0} },
546 {ARRAY_SIZE(read_iarr), 0x88, 0, F_D_IN | FF_MEDIA_IO, /* READ(16) */
547 resp_read_dt0, read_iarr, {16, 0xfe, 0xff, 0xff, 0xff, 0xff,
548 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc7} },
549/* 10 */
550 {ARRAY_SIZE(write_iarr), 0x8a, 0, F_D_OUT | FF_MEDIA_IO,
551 resp_write_dt0, write_iarr, /* WRITE(16) */
552 {16, 0xfa, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
553 0xff, 0xff, 0xff, 0xff, 0xff, 0xc7} },
554 {0, 0x1b, 0, F_SSU_DELAY, resp_start_stop, NULL,/* START STOP UNIT */
555 {6, 0x1, 0, 0xf, 0xf7, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
556 {ARRAY_SIZE(sa_in_16_iarr), 0x9e, 0x10, F_SA_LOW | F_D_IN,
557 resp_readcap16, sa_in_16_iarr, /* SA_IN(16), READ CAPACITY(16) */
558 {16, 0x10, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
559 0xff, 0xff, 0xff, 0xff, 0x1, 0xc7} },
560 {0, 0x9f, 0x12, F_SA_LOW | F_D_OUT | FF_MEDIA_IO, resp_write_scat,
561 NULL, {16, 0x12, 0xf9, 0x0, 0xff, 0xff, 0, 0, 0xff, 0xff, 0xff,
562 0xff, 0xff, 0xff, 0xff, 0xc7} }, /* SA_OUT(16), WRITE SCAT(16) */
563 {ARRAY_SIZE(maint_in_iarr), 0xa3, 0xa, F_SA_LOW | F_D_IN,
564 resp_report_tgtpgs, /* MAINT IN, REPORT TARGET PORT GROUPS */
565 maint_in_iarr, {12, 0xea, 0, 0, 0, 0, 0xff, 0xff, 0xff,
566 0xff, 0, 0xc7, 0, 0, 0, 0} },
567/* 15 */
568 {0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL, /* MAINT OUT */
569 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
570 {0, 0x2f, 0, F_D_OUT_MAYBE | FF_MEDIA_IO, NULL, NULL, /* VERIFY(10) */
571 {10, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc7,
572 0, 0, 0, 0, 0, 0} },
573 {ARRAY_SIZE(vl_iarr), 0x7f, 0x9, F_SA_HIGH | F_D_IN | FF_MEDIA_IO,
574 resp_read_dt0, vl_iarr, /* VARIABLE LENGTH, READ(32) */
575 {32, 0xc7, 0, 0, 0, 0, 0x3f, 0x18, 0x0, 0x9, 0xfe, 0, 0xff, 0xff,
576 0xff, 0xff} },
577 {ARRAY_SIZE(reserve_iarr), 0x56, 0, F_D_OUT,
578 NULL, reserve_iarr, /* RESERVE(10) <no response function> */
579 {10, 0xff, 0xff, 0xff, 0, 0, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0,
580 0} },
581 {ARRAY_SIZE(release_iarr), 0x57, 0, F_D_OUT,
582 NULL, release_iarr, /* RELEASE(10) <no response function> */
583 {10, 0x13, 0xff, 0xff, 0, 0, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0,
584 0} },
585/* 20 */
586 {0, 0x1e, 0, 0, NULL, NULL, /* ALLOW REMOVAL */
587 {6, 0, 0, 0, 0x3, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
588 {0, 0x1, 0, 0, resp_start_stop, NULL, /* REWIND ?? */
589 {6, 0x1, 0, 0, 0, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
590 {0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL, /* ATA_PT */
591 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
592 {0, 0x1d, F_D_OUT, 0, NULL, NULL, /* SEND DIAGNOSTIC */
593 {6, 0xf7, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
594 {0, 0x42, 0, F_D_OUT | FF_MEDIA_IO, resp_unmap, NULL, /* UNMAP */
595 {10, 0x1, 0, 0, 0, 0, 0x3f, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0} },
596/* 25 */
597 {0, 0x3b, 0, F_D_OUT_MAYBE, resp_write_buffer, NULL,
598 {10, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0,
599 0, 0, 0, 0} }, /* WRITE_BUFFER */
600 {ARRAY_SIZE(write_same_iarr), 0x41, 0, F_D_OUT_MAYBE | FF_MEDIA_IO,
601 resp_write_same_10, write_same_iarr, /* WRITE SAME(10) */
602 {10, 0xff, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xff, 0xff, 0xc7, 0,
603 0, 0, 0, 0, 0} },
604 {ARRAY_SIZE(sync_cache_iarr), 0x35, 0, F_SYNC_DELAY | F_M_ACCESS,
605 resp_sync_cache, sync_cache_iarr,
606 {10, 0x7, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xff, 0xff, 0xc7, 0, 0,
607 0, 0, 0, 0} }, /* SYNC_CACHE (10) */
608 {0, 0x89, 0, F_D_OUT | FF_MEDIA_IO, resp_comp_write, NULL,
609 {16, 0xf8, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0, 0,
610 0, 0xff, 0x3f, 0xc7} }, /* COMPARE AND WRITE */
611
612/* 29 */
613 {0xff, 0, 0, 0, NULL, NULL, /* terminating element */
614 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
615};
616
617static int sdebug_add_host = DEF_NUM_HOST;
618static int sdebug_ato = DEF_ATO;
619static int sdebug_cdb_len = DEF_CDB_LEN;
620static int sdebug_jdelay = DEF_JDELAY; /* if > 0 then unit is jiffies */
621static int sdebug_dev_size_mb = DEF_DEV_SIZE_MB;
622static int sdebug_dif = DEF_DIF;
623static int sdebug_dix = DEF_DIX;
624static int sdebug_dsense = DEF_D_SENSE;
625static int sdebug_every_nth = DEF_EVERY_NTH;
626static int sdebug_fake_rw = DEF_FAKE_RW;
627static unsigned int sdebug_guard = DEF_GUARD;
628static int sdebug_lowest_aligned = DEF_LOWEST_ALIGNED;
629static int sdebug_max_luns = DEF_MAX_LUNS;
630static int sdebug_max_queue = SDEBUG_CANQUEUE; /* per submit queue */
631static unsigned int sdebug_medium_error_start = OPT_MEDIUM_ERR_ADDR;
632static int sdebug_medium_error_count = OPT_MEDIUM_ERR_NUM;
633static atomic_t retired_max_queue; /* if > 0 then was prior max_queue */
634static int sdebug_ndelay = DEF_NDELAY; /* if > 0 then unit is nanoseconds */
635static int sdebug_no_lun_0 = DEF_NO_LUN_0;
636static int sdebug_no_uld;
637static int sdebug_num_parts = DEF_NUM_PARTS;
638static int sdebug_num_tgts = DEF_NUM_TGTS; /* targets per host */
639static int sdebug_opt_blks = DEF_OPT_BLKS;
640static int sdebug_opts = DEF_OPTS;
641static int sdebug_physblk_exp = DEF_PHYSBLK_EXP;
642static int sdebug_opt_xferlen_exp = DEF_OPT_XFERLEN_EXP;
643static int sdebug_ptype = DEF_PTYPE; /* SCSI peripheral device type */
644static int sdebug_scsi_level = DEF_SCSI_LEVEL;
645static int sdebug_sector_size = DEF_SECTOR_SIZE;
646static int sdebug_virtual_gb = DEF_VIRTUAL_GB;
647static int sdebug_vpd_use_hostno = DEF_VPD_USE_HOSTNO;
648static unsigned int sdebug_lbpu = DEF_LBPU;
649static unsigned int sdebug_lbpws = DEF_LBPWS;
650static unsigned int sdebug_lbpws10 = DEF_LBPWS10;
651static unsigned int sdebug_lbprz = DEF_LBPRZ;
652static unsigned int sdebug_unmap_alignment = DEF_UNMAP_ALIGNMENT;
653static unsigned int sdebug_unmap_granularity = DEF_UNMAP_GRANULARITY;
654static unsigned int sdebug_unmap_max_blocks = DEF_UNMAP_MAX_BLOCKS;
655static unsigned int sdebug_unmap_max_desc = DEF_UNMAP_MAX_DESC;
656static unsigned int sdebug_write_same_length = DEF_WRITESAME_LENGTH;
657static int sdebug_uuid_ctl = DEF_UUID_CTL;
658static bool sdebug_removable = DEF_REMOVABLE;
659static bool sdebug_clustering;
660static bool sdebug_host_lock = DEF_HOST_LOCK;
661static bool sdebug_strict = DEF_STRICT;
662static bool sdebug_any_injecting_opt;
663static bool sdebug_verbose;
664static bool have_dif_prot;
665static bool write_since_sync;
666static bool sdebug_statistics = DEF_STATISTICS;
667static bool sdebug_wp;
668
669static unsigned int sdebug_store_sectors;
670static sector_t sdebug_capacity; /* in sectors */
671
672/* old BIOS stuff, kernel may get rid of them but some mode sense pages
673 may still need them */
674static int sdebug_heads; /* heads per disk */
675static int sdebug_cylinders_per; /* cylinders per surface */
676static int sdebug_sectors_per; /* sectors per cylinder */
677
678static LIST_HEAD(sdebug_host_list);
679static DEFINE_SPINLOCK(sdebug_host_list_lock);
680
681static unsigned char *fake_storep; /* ramdisk storage */
682static struct t10_pi_tuple *dif_storep; /* protection info */
683static void *map_storep; /* provisioning map */
684
685static unsigned long map_size;
686static int num_aborts;
687static int num_dev_resets;
688static int num_target_resets;
689static int num_bus_resets;
690static int num_host_resets;
691static int dix_writes;
692static int dix_reads;
693static int dif_errors;
694
695static int submit_queues = DEF_SUBMIT_QUEUES; /* > 1 for multi-queue (mq) */
696static struct sdebug_queue *sdebug_q_arr; /* ptr to array of submit queues */
697
698static DEFINE_RWLOCK(atomic_rw);
699
700static char sdebug_proc_name[] = MY_NAME;
701static const char *my_name = MY_NAME;
702
703static struct bus_type pseudo_lld_bus;
704
705static struct device_driver sdebug_driverfs_driver = {
706 .name = sdebug_proc_name,
707 .bus = &pseudo_lld_bus,
708};
709
710static const int check_condition_result =
711 (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
712
713static const int illegal_condition_result =
714 (DRIVER_SENSE << 24) | (DID_ABORT << 16) | SAM_STAT_CHECK_CONDITION;
715
716static const int device_qfull_result =
717 (DID_OK << 16) | (COMMAND_COMPLETE << 8) | SAM_STAT_TASK_SET_FULL;
718
719
720/* Only do the extra work involved in logical block provisioning if one or
721 * more of the lbpu, lbpws or lbpws10 parameters are given and we are doing
722 * real reads and writes (i.e. not skipping them for speed).
723 */
724static inline bool scsi_debug_lbp(void)
725{
726 return 0 == sdebug_fake_rw &&
727 (sdebug_lbpu || sdebug_lbpws || sdebug_lbpws10);
728}
729
730static void *lba2fake_store(unsigned long long lba)
731{
732 lba = do_div(lba, sdebug_store_sectors);
733
734 return fake_storep + lba * sdebug_sector_size;
735}
736
737static struct t10_pi_tuple *dif_store(sector_t sector)
738{
739 sector = sector_div(sector, sdebug_store_sectors);
740
741 return dif_storep + sector;
742}
743
744static void sdebug_max_tgts_luns(void)
745{
746 struct sdebug_host_info *sdbg_host;
747 struct Scsi_Host *hpnt;
748
749 spin_lock(&sdebug_host_list_lock);
750 list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) {
751 hpnt = sdbg_host->shost;
752 if ((hpnt->this_id >= 0) &&
753 (sdebug_num_tgts > hpnt->this_id))
754 hpnt->max_id = sdebug_num_tgts + 1;
755 else
756 hpnt->max_id = sdebug_num_tgts;
757 /* sdebug_max_luns; */
758 hpnt->max_lun = SCSI_W_LUN_REPORT_LUNS + 1;
759 }
760 spin_unlock(&sdebug_host_list_lock);
761}
762
763enum sdeb_cmd_data {SDEB_IN_DATA = 0, SDEB_IN_CDB = 1};
764
765/* Set in_bit to -1 to indicate no bit position of invalid field */
766static void mk_sense_invalid_fld(struct scsi_cmnd *scp,
767 enum sdeb_cmd_data c_d,
768 int in_byte, int in_bit)
769{
770 unsigned char *sbuff;
771 u8 sks[4];
772 int sl, asc;
773
774 sbuff = scp->sense_buffer;
775 if (!sbuff) {
776 sdev_printk(KERN_ERR, scp->device,
777 "%s: sense_buffer is NULL\n", __func__);
778 return;
779 }
780 asc = c_d ? INVALID_FIELD_IN_CDB : INVALID_FIELD_IN_PARAM_LIST;
781 memset(sbuff, 0, SCSI_SENSE_BUFFERSIZE);
782 scsi_build_sense_buffer(sdebug_dsense, sbuff, ILLEGAL_REQUEST, asc, 0);
783 memset(sks, 0, sizeof(sks));
784 sks[0] = 0x80;
785 if (c_d)
786 sks[0] |= 0x40;
787 if (in_bit >= 0) {
788 sks[0] |= 0x8;
789 sks[0] |= 0x7 & in_bit;
790 }
791 put_unaligned_be16(in_byte, sks + 1);
792 if (sdebug_dsense) {
793 sl = sbuff[7] + 8;
794 sbuff[7] = sl;
795 sbuff[sl] = 0x2;
796 sbuff[sl + 1] = 0x6;
797 memcpy(sbuff + sl + 4, sks, 3);
798 } else
799 memcpy(sbuff + 15, sks, 3);
800 if (sdebug_verbose)
801 sdev_printk(KERN_INFO, scp->device, "%s: [sense_key,asc,ascq"
802 "]: [0x5,0x%x,0x0] %c byte=%d, bit=%d\n",
803 my_name, asc, c_d ? 'C' : 'D', in_byte, in_bit);
804}
805
806static void mk_sense_buffer(struct scsi_cmnd *scp, int key, int asc, int asq)
807{
808 unsigned char *sbuff;
809
810 sbuff = scp->sense_buffer;
811 if (!sbuff) {
812 sdev_printk(KERN_ERR, scp->device,
813 "%s: sense_buffer is NULL\n", __func__);
814 return;
815 }
816 memset(sbuff, 0, SCSI_SENSE_BUFFERSIZE);
817
818 scsi_build_sense_buffer(sdebug_dsense, sbuff, key, asc, asq);
819
820 if (sdebug_verbose)
821 sdev_printk(KERN_INFO, scp->device,
822 "%s: [sense_key,asc,ascq]: [0x%x,0x%x,0x%x]\n",
823 my_name, key, asc, asq);
824}
825
826static void mk_sense_invalid_opcode(struct scsi_cmnd *scp)
827{
828 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_OPCODE, 0);
829}
830
831static int scsi_debug_ioctl(struct scsi_device *dev, unsigned int cmd,
832 void __user *arg)
833{
834 if (sdebug_verbose) {
835 if (0x1261 == cmd)
836 sdev_printk(KERN_INFO, dev,
837 "%s: BLKFLSBUF [0x1261]\n", __func__);
838 else if (0x5331 == cmd)
839 sdev_printk(KERN_INFO, dev,
840 "%s: CDROM_GET_CAPABILITY [0x5331]\n",
841 __func__);
842 else
843 sdev_printk(KERN_INFO, dev, "%s: cmd=0x%x\n",
844 __func__, cmd);
845 }
846 return -EINVAL;
847 /* return -ENOTTY; // correct return but upsets fdisk */
848}
849
850static void config_cdb_len(struct scsi_device *sdev)
851{
852 switch (sdebug_cdb_len) {
853 case 6: /* suggest 6 byte READ, WRITE and MODE SENSE/SELECT */
854 sdev->use_10_for_rw = false;
855 sdev->use_16_for_rw = false;
856 sdev->use_10_for_ms = false;
857 break;
858 case 10: /* suggest 10 byte RWs and 6 byte MODE SENSE/SELECT */
859 sdev->use_10_for_rw = true;
860 sdev->use_16_for_rw = false;
861 sdev->use_10_for_ms = false;
862 break;
863 case 12: /* suggest 10 byte RWs and 10 byte MODE SENSE/SELECT */
864 sdev->use_10_for_rw = true;
865 sdev->use_16_for_rw = false;
866 sdev->use_10_for_ms = true;
867 break;
868 case 16:
869 sdev->use_10_for_rw = false;
870 sdev->use_16_for_rw = true;
871 sdev->use_10_for_ms = true;
872 break;
873 case 32: /* No knobs to suggest this so same as 16 for now */
874 sdev->use_10_for_rw = false;
875 sdev->use_16_for_rw = true;
876 sdev->use_10_for_ms = true;
877 break;
878 default:
879 pr_warn("unexpected cdb_len=%d, force to 10\n",
880 sdebug_cdb_len);
881 sdev->use_10_for_rw = true;
882 sdev->use_16_for_rw = false;
883 sdev->use_10_for_ms = false;
884 sdebug_cdb_len = 10;
885 break;
886 }
887}
888
889static void all_config_cdb_len(void)
890{
891 struct sdebug_host_info *sdbg_host;
892 struct Scsi_Host *shost;
893 struct scsi_device *sdev;
894
895 spin_lock(&sdebug_host_list_lock);
896 list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) {
897 shost = sdbg_host->shost;
898 shost_for_each_device(sdev, shost) {
899 config_cdb_len(sdev);
900 }
901 }
902 spin_unlock(&sdebug_host_list_lock);
903}
904
905static void clear_luns_changed_on_target(struct sdebug_dev_info *devip)
906{
907 struct sdebug_host_info *sdhp;
908 struct sdebug_dev_info *dp;
909
910 spin_lock(&sdebug_host_list_lock);
911 list_for_each_entry(sdhp, &sdebug_host_list, host_list) {
912 list_for_each_entry(dp, &sdhp->dev_info_list, dev_list) {
913 if ((devip->sdbg_host == dp->sdbg_host) &&
914 (devip->target == dp->target))
915 clear_bit(SDEBUG_UA_LUNS_CHANGED, dp->uas_bm);
916 }
917 }
918 spin_unlock(&sdebug_host_list_lock);
919}
920
921static int make_ua(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
922{
923 int k;
924
925 k = find_first_bit(devip->uas_bm, SDEBUG_NUM_UAS);
926 if (k != SDEBUG_NUM_UAS) {
927 const char *cp = NULL;
928
929 switch (k) {
930 case SDEBUG_UA_POR:
931 mk_sense_buffer(scp, UNIT_ATTENTION, UA_RESET_ASC,
932 POWER_ON_RESET_ASCQ);
933 if (sdebug_verbose)
934 cp = "power on reset";
935 break;
936 case SDEBUG_UA_BUS_RESET:
937 mk_sense_buffer(scp, UNIT_ATTENTION, UA_RESET_ASC,
938 BUS_RESET_ASCQ);
939 if (sdebug_verbose)
940 cp = "bus reset";
941 break;
942 case SDEBUG_UA_MODE_CHANGED:
943 mk_sense_buffer(scp, UNIT_ATTENTION, UA_CHANGED_ASC,
944 MODE_CHANGED_ASCQ);
945 if (sdebug_verbose)
946 cp = "mode parameters changed";
947 break;
948 case SDEBUG_UA_CAPACITY_CHANGED:
949 mk_sense_buffer(scp, UNIT_ATTENTION, UA_CHANGED_ASC,
950 CAPACITY_CHANGED_ASCQ);
951 if (sdebug_verbose)
952 cp = "capacity data changed";
953 break;
954 case SDEBUG_UA_MICROCODE_CHANGED:
955 mk_sense_buffer(scp, UNIT_ATTENTION,
956 TARGET_CHANGED_ASC,
957 MICROCODE_CHANGED_ASCQ);
958 if (sdebug_verbose)
959 cp = "microcode has been changed";
960 break;
961 case SDEBUG_UA_MICROCODE_CHANGED_WO_RESET:
962 mk_sense_buffer(scp, UNIT_ATTENTION,
963 TARGET_CHANGED_ASC,
964 MICROCODE_CHANGED_WO_RESET_ASCQ);
965 if (sdebug_verbose)
966 cp = "microcode has been changed without reset";
967 break;
968 case SDEBUG_UA_LUNS_CHANGED:
969 /*
970 * SPC-3 behavior is to report a UNIT ATTENTION with
971 * ASC/ASCQ REPORTED LUNS DATA HAS CHANGED on every LUN
972 * on the target, until a REPORT LUNS command is
973 * received. SPC-4 behavior is to report it only once.
974 * NOTE: sdebug_scsi_level does not use the same
975 * values as struct scsi_device->scsi_level.
976 */
977 if (sdebug_scsi_level >= 6) /* SPC-4 and above */
978 clear_luns_changed_on_target(devip);
979 mk_sense_buffer(scp, UNIT_ATTENTION,
980 TARGET_CHANGED_ASC,
981 LUNS_CHANGED_ASCQ);
982 if (sdebug_verbose)
983 cp = "reported luns data has changed";
984 break;
985 default:
986 pr_warn("unexpected unit attention code=%d\n", k);
987 if (sdebug_verbose)
988 cp = "unknown";
989 break;
990 }
991 clear_bit(k, devip->uas_bm);
992 if (sdebug_verbose)
993 sdev_printk(KERN_INFO, scp->device,
994 "%s reports: Unit attention: %s\n",
995 my_name, cp);
996 return check_condition_result;
997 }
998 return 0;
999}
1000
1001/* Build SCSI "data-in" buffer. Returns 0 if ok else (DID_ERROR << 16). */
1002static int fill_from_dev_buffer(struct scsi_cmnd *scp, unsigned char *arr,
1003 int arr_len)
1004{
1005 int act_len;
1006 struct scsi_data_buffer *sdb = &scp->sdb;
1007
1008 if (!sdb->length)
1009 return 0;
1010 if (scp->sc_data_direction != DMA_FROM_DEVICE)
1011 return DID_ERROR << 16;
1012
1013 act_len = sg_copy_from_buffer(sdb->table.sgl, sdb->table.nents,
1014 arr, arr_len);
1015 scsi_set_resid(scp, scsi_bufflen(scp) - act_len);
1016
1017 return 0;
1018}
1019
1020/* Partial build of SCSI "data-in" buffer. Returns 0 if ok else
1021 * (DID_ERROR << 16). Can write to offset in data-in buffer. If multiple
1022 * calls, not required to write in ascending offset order. Assumes resid
1023 * set to scsi_bufflen() prior to any calls.
1024 */
1025static int p_fill_from_dev_buffer(struct scsi_cmnd *scp, const void *arr,
1026 int arr_len, unsigned int off_dst)
1027{
1028 int act_len, n;
1029 struct scsi_data_buffer *sdb = &scp->sdb;
1030 off_t skip = off_dst;
1031
1032 if (sdb->length <= off_dst)
1033 return 0;
1034 if (scp->sc_data_direction != DMA_FROM_DEVICE)
1035 return DID_ERROR << 16;
1036
1037 act_len = sg_pcopy_from_buffer(sdb->table.sgl, sdb->table.nents,
1038 arr, arr_len, skip);
1039 pr_debug("%s: off_dst=%u, scsi_bufflen=%u, act_len=%u, resid=%d\n",
1040 __func__, off_dst, scsi_bufflen(scp), act_len,
1041 scsi_get_resid(scp));
1042 n = (int)scsi_bufflen(scp) - ((int)off_dst + act_len);
1043 scsi_set_resid(scp, min(scsi_get_resid(scp), n));
1044 return 0;
1045}
1046
1047/* Fetches from SCSI "data-out" buffer. Returns number of bytes fetched into
1048 * 'arr' or -1 if error.
1049 */
1050static int fetch_to_dev_buffer(struct scsi_cmnd *scp, unsigned char *arr,
1051 int arr_len)
1052{
1053 if (!scsi_bufflen(scp))
1054 return 0;
1055 if (scp->sc_data_direction != DMA_TO_DEVICE)
1056 return -1;
1057
1058 return scsi_sg_copy_to_buffer(scp, arr, arr_len);
1059}
1060
1061
1062static char sdebug_inq_vendor_id[9] = "Linux ";
1063static char sdebug_inq_product_id[17] = "scsi_debug ";
1064static char sdebug_inq_product_rev[5] = SDEBUG_VERSION;
1065/* Use some locally assigned NAAs for SAS addresses. */
1066static const u64 naa3_comp_a = 0x3222222000000000ULL;
1067static const u64 naa3_comp_b = 0x3333333000000000ULL;
1068static const u64 naa3_comp_c = 0x3111111000000000ULL;
1069
1070/* Device identification VPD page. Returns number of bytes placed in arr */
1071static int inquiry_vpd_83(unsigned char *arr, int port_group_id,
1072 int target_dev_id, int dev_id_num,
1073 const char *dev_id_str, int dev_id_str_len,
1074 const uuid_t *lu_name)
1075{
1076 int num, port_a;
1077 char b[32];
1078
1079 port_a = target_dev_id + 1;
1080 /* T10 vendor identifier field format (faked) */
1081 arr[0] = 0x2; /* ASCII */
1082 arr[1] = 0x1;
1083 arr[2] = 0x0;
1084 memcpy(&arr[4], sdebug_inq_vendor_id, 8);
1085 memcpy(&arr[12], sdebug_inq_product_id, 16);
1086 memcpy(&arr[28], dev_id_str, dev_id_str_len);
1087 num = 8 + 16 + dev_id_str_len;
1088 arr[3] = num;
1089 num += 4;
1090 if (dev_id_num >= 0) {
1091 if (sdebug_uuid_ctl) {
1092 /* Locally assigned UUID */
1093 arr[num++] = 0x1; /* binary (not necessarily sas) */
1094 arr[num++] = 0xa; /* PIV=0, lu, naa */
1095 arr[num++] = 0x0;
1096 arr[num++] = 0x12;
1097 arr[num++] = 0x10; /* uuid type=1, locally assigned */
1098 arr[num++] = 0x0;
1099 memcpy(arr + num, lu_name, 16);
1100 num += 16;
1101 } else {
1102 /* NAA-3, Logical unit identifier (binary) */
1103 arr[num++] = 0x1; /* binary (not necessarily sas) */
1104 arr[num++] = 0x3; /* PIV=0, lu, naa */
1105 arr[num++] = 0x0;
1106 arr[num++] = 0x8;
1107 put_unaligned_be64(naa3_comp_b + dev_id_num, arr + num);
1108 num += 8;
1109 }
1110 /* Target relative port number */
1111 arr[num++] = 0x61; /* proto=sas, binary */
1112 arr[num++] = 0x94; /* PIV=1, target port, rel port */
1113 arr[num++] = 0x0; /* reserved */
1114 arr[num++] = 0x4; /* length */
1115 arr[num++] = 0x0; /* reserved */
1116 arr[num++] = 0x0; /* reserved */
1117 arr[num++] = 0x0;
1118 arr[num++] = 0x1; /* relative port A */
1119 }
1120 /* NAA-3, Target port identifier */
1121 arr[num++] = 0x61; /* proto=sas, binary */
1122 arr[num++] = 0x93; /* piv=1, target port, naa */
1123 arr[num++] = 0x0;
1124 arr[num++] = 0x8;
1125 put_unaligned_be64(naa3_comp_a + port_a, arr + num);
1126 num += 8;
1127 /* NAA-3, Target port group identifier */
1128 arr[num++] = 0x61; /* proto=sas, binary */
1129 arr[num++] = 0x95; /* piv=1, target port group id */
1130 arr[num++] = 0x0;
1131 arr[num++] = 0x4;
1132 arr[num++] = 0;
1133 arr[num++] = 0;
1134 put_unaligned_be16(port_group_id, arr + num);
1135 num += 2;
1136 /* NAA-3, Target device identifier */
1137 arr[num++] = 0x61; /* proto=sas, binary */
1138 arr[num++] = 0xa3; /* piv=1, target device, naa */
1139 arr[num++] = 0x0;
1140 arr[num++] = 0x8;
1141 put_unaligned_be64(naa3_comp_a + target_dev_id, arr + num);
1142 num += 8;
1143 /* SCSI name string: Target device identifier */
1144 arr[num++] = 0x63; /* proto=sas, UTF-8 */
1145 arr[num++] = 0xa8; /* piv=1, target device, SCSI name string */
1146 arr[num++] = 0x0;
1147 arr[num++] = 24;
1148 memcpy(arr + num, "naa.32222220", 12);
1149 num += 12;
1150 snprintf(b, sizeof(b), "%08X", target_dev_id);
1151 memcpy(arr + num, b, 8);
1152 num += 8;
1153 memset(arr + num, 0, 4);
1154 num += 4;
1155 return num;
1156}
1157
1158static unsigned char vpd84_data[] = {
1159/* from 4th byte */ 0x22,0x22,0x22,0x0,0xbb,0x0,
1160 0x22,0x22,0x22,0x0,0xbb,0x1,
1161 0x22,0x22,0x22,0x0,0xbb,0x2,
1162};
1163
1164/* Software interface identification VPD page */
1165static int inquiry_vpd_84(unsigned char *arr)
1166{
1167 memcpy(arr, vpd84_data, sizeof(vpd84_data));
1168 return sizeof(vpd84_data);
1169}
1170
1171/* Management network addresses VPD page */
1172static int inquiry_vpd_85(unsigned char *arr)
1173{
1174 int num = 0;
1175 const char *na1 = "https://www.kernel.org/config";
1176 const char *na2 = "http://www.kernel.org/log";
1177 int plen, olen;
1178
1179 arr[num++] = 0x1; /* lu, storage config */
1180 arr[num++] = 0x0; /* reserved */
1181 arr[num++] = 0x0;
1182 olen = strlen(na1);
1183 plen = olen + 1;
1184 if (plen % 4)
1185 plen = ((plen / 4) + 1) * 4;
1186 arr[num++] = plen; /* length, null termianted, padded */
1187 memcpy(arr + num, na1, olen);
1188 memset(arr + num + olen, 0, plen - olen);
1189 num += plen;
1190
1191 arr[num++] = 0x4; /* lu, logging */
1192 arr[num++] = 0x0; /* reserved */
1193 arr[num++] = 0x0;
1194 olen = strlen(na2);
1195 plen = olen + 1;
1196 if (plen % 4)
1197 plen = ((plen / 4) + 1) * 4;
1198 arr[num++] = plen; /* length, null terminated, padded */
1199 memcpy(arr + num, na2, olen);
1200 memset(arr + num + olen, 0, plen - olen);
1201 num += plen;
1202
1203 return num;
1204}
1205
1206/* SCSI ports VPD page */
1207static int inquiry_vpd_88(unsigned char *arr, int target_dev_id)
1208{
1209 int num = 0;
1210 int port_a, port_b;
1211
1212 port_a = target_dev_id + 1;
1213 port_b = port_a + 1;
1214 arr[num++] = 0x0; /* reserved */
1215 arr[num++] = 0x0; /* reserved */
1216 arr[num++] = 0x0;
1217 arr[num++] = 0x1; /* relative port 1 (primary) */
1218 memset(arr + num, 0, 6);
1219 num += 6;
1220 arr[num++] = 0x0;
1221 arr[num++] = 12; /* length tp descriptor */
1222 /* naa-5 target port identifier (A) */
1223 arr[num++] = 0x61; /* proto=sas, binary */
1224 arr[num++] = 0x93; /* PIV=1, target port, NAA */
1225 arr[num++] = 0x0; /* reserved */
1226 arr[num++] = 0x8; /* length */
1227 put_unaligned_be64(naa3_comp_a + port_a, arr + num);
1228 num += 8;
1229 arr[num++] = 0x0; /* reserved */
1230 arr[num++] = 0x0; /* reserved */
1231 arr[num++] = 0x0;
1232 arr[num++] = 0x2; /* relative port 2 (secondary) */
1233 memset(arr + num, 0, 6);
1234 num += 6;
1235 arr[num++] = 0x0;
1236 arr[num++] = 12; /* length tp descriptor */
1237 /* naa-5 target port identifier (B) */
1238 arr[num++] = 0x61; /* proto=sas, binary */
1239 arr[num++] = 0x93; /* PIV=1, target port, NAA */
1240 arr[num++] = 0x0; /* reserved */
1241 arr[num++] = 0x8; /* length */
1242 put_unaligned_be64(naa3_comp_a + port_b, arr + num);
1243 num += 8;
1244
1245 return num;
1246}
1247
1248
1249static unsigned char vpd89_data[] = {
1250/* from 4th byte */ 0,0,0,0,
1251'l','i','n','u','x',' ',' ',' ',
1252'S','A','T',' ','s','c','s','i','_','d','e','b','u','g',' ',' ',
1253'1','2','3','4',
12540x34,0,0,0,1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,
12550xec,0,0,0,
12560x5a,0xc,0xff,0x3f,0x37,0xc8,0x10,0,0,0,0,0,0x3f,0,0,0,
12570,0,0,0,0x58,0x58,0x58,0x58,0x58,0x58,0x58,0x58,0x20,0x20,0x20,0x20,
12580x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0,0,0,0x40,0x4,0,0x2e,0x33,
12590x38,0x31,0x20,0x20,0x20,0x20,0x54,0x53,0x38,0x33,0x30,0x30,0x33,0x31,
12600x53,0x41,
12610x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,
12620x20,0x20,
12630x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,
12640x10,0x80,
12650,0,0,0x2f,0,0,0,0x2,0,0x2,0x7,0,0xff,0xff,0x1,0,
12660x3f,0,0xc1,0xff,0x3e,0,0x10,0x1,0xb0,0xf8,0x50,0x9,0,0,0x7,0,
12670x3,0,0x78,0,0x78,0,0xf0,0,0x78,0,0,0,0,0,0,0,
12680,0,0,0,0,0,0,0,0x2,0,0,0,0,0,0,0,
12690x7e,0,0x1b,0,0x6b,0x34,0x1,0x7d,0x3,0x40,0x69,0x34,0x1,0x3c,0x3,0x40,
12700x7f,0x40,0,0,0,0,0xfe,0xfe,0,0,0,0,0,0xfe,0,0,
12710,0,0,0,0,0,0,0,0xb0,0xf8,0x50,0x9,0,0,0,0,
12720,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
12730,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
12740,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
12750x1,0,0xb0,0xf8,0x50,0x9,0xb0,0xf8,0x50,0x9,0x20,0x20,0x2,0,0xb6,0x42,
12760,0x80,0x8a,0,0x6,0x3c,0xa,0x3c,0xff,0xff,0xc6,0x7,0,0x1,0,0x8,
12770xf0,0xf,0,0x10,0x2,0,0x30,0,0,0,0,0,0,0,0x6,0xfe,
12780,0,0x2,0,0x50,0,0x8a,0,0x4f,0x95,0,0,0x21,0,0xb,0,
12790,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
12800,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
12810,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
12820,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
12830,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
12840,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
12850,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
12860,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
12870,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
12880,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
12890,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
12900,0,0,0,0,0,0,0,0,0,0,0,0,0,0xa5,0x51,
1291};
1292
1293/* ATA Information VPD page */
1294static int inquiry_vpd_89(unsigned char *arr)
1295{
1296 memcpy(arr, vpd89_data, sizeof(vpd89_data));
1297 return sizeof(vpd89_data);
1298}
1299
1300
1301static unsigned char vpdb0_data[] = {
1302 /* from 4th byte */ 0,0,0,4, 0,0,0x4,0, 0,0,0,64,
1303 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1304 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1305 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1306};
1307
1308/* Block limits VPD page (SBC-3) */
1309static int inquiry_vpd_b0(unsigned char *arr)
1310{
1311 unsigned int gran;
1312
1313 memcpy(arr, vpdb0_data, sizeof(vpdb0_data));
1314
1315 /* Optimal transfer length granularity */
1316 if (sdebug_opt_xferlen_exp != 0 &&
1317 sdebug_physblk_exp < sdebug_opt_xferlen_exp)
1318 gran = 1 << sdebug_opt_xferlen_exp;
1319 else
1320 gran = 1 << sdebug_physblk_exp;
1321 put_unaligned_be16(gran, arr + 2);
1322
1323 /* Maximum Transfer Length */
1324 if (sdebug_store_sectors > 0x400)
1325 put_unaligned_be32(sdebug_store_sectors, arr + 4);
1326
1327 /* Optimal Transfer Length */
1328 put_unaligned_be32(sdebug_opt_blks, &arr[8]);
1329
1330 if (sdebug_lbpu) {
1331 /* Maximum Unmap LBA Count */
1332 put_unaligned_be32(sdebug_unmap_max_blocks, &arr[16]);
1333
1334 /* Maximum Unmap Block Descriptor Count */
1335 put_unaligned_be32(sdebug_unmap_max_desc, &arr[20]);
1336 }
1337
1338 /* Unmap Granularity Alignment */
1339 if (sdebug_unmap_alignment) {
1340 put_unaligned_be32(sdebug_unmap_alignment, &arr[28]);
1341 arr[28] |= 0x80; /* UGAVALID */
1342 }
1343
1344 /* Optimal Unmap Granularity */
1345 put_unaligned_be32(sdebug_unmap_granularity, &arr[24]);
1346
1347 /* Maximum WRITE SAME Length */
1348 put_unaligned_be64(sdebug_write_same_length, &arr[32]);
1349
1350 return 0x3c; /* Mandatory page length for Logical Block Provisioning */
1351
1352 return sizeof(vpdb0_data);
1353}
1354
1355/* Block device characteristics VPD page (SBC-3) */
1356static int inquiry_vpd_b1(unsigned char *arr)
1357{
1358 memset(arr, 0, 0x3c);
1359 arr[0] = 0;
1360 arr[1] = 1; /* non rotating medium (e.g. solid state) */
1361 arr[2] = 0;
1362 arr[3] = 5; /* less than 1.8" */
1363
1364 return 0x3c;
1365}
1366
1367/* Logical block provisioning VPD page (SBC-4) */
1368static int inquiry_vpd_b2(unsigned char *arr)
1369{
1370 memset(arr, 0, 0x4);
1371 arr[0] = 0; /* threshold exponent */
1372 if (sdebug_lbpu)
1373 arr[1] = 1 << 7;
1374 if (sdebug_lbpws)
1375 arr[1] |= 1 << 6;
1376 if (sdebug_lbpws10)
1377 arr[1] |= 1 << 5;
1378 if (sdebug_lbprz && scsi_debug_lbp())
1379 arr[1] |= (sdebug_lbprz & 0x7) << 2; /* sbc4r07 and later */
1380 /* anc_sup=0; dp=0 (no provisioning group descriptor) */
1381 /* minimum_percentage=0; provisioning_type=0 (unknown) */
1382 /* threshold_percentage=0 */
1383 return 0x4;
1384}
1385
1386#define SDEBUG_LONG_INQ_SZ 96
1387#define SDEBUG_MAX_INQ_ARR_SZ 584
1388
1389static int resp_inquiry(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
1390{
1391 unsigned char pq_pdt;
1392 unsigned char *arr;
1393 unsigned char *cmd = scp->cmnd;
1394 int alloc_len, n, ret;
1395 bool have_wlun, is_disk;
1396
1397 alloc_len = get_unaligned_be16(cmd + 3);
1398 arr = kzalloc(SDEBUG_MAX_INQ_ARR_SZ, GFP_ATOMIC);
1399 if (! arr)
1400 return DID_REQUEUE << 16;
1401 is_disk = (sdebug_ptype == TYPE_DISK);
1402 have_wlun = scsi_is_wlun(scp->device->lun);
1403 if (have_wlun)
1404 pq_pdt = TYPE_WLUN; /* present, wlun */
1405 else if (sdebug_no_lun_0 && (devip->lun == SDEBUG_LUN_0_VAL))
1406 pq_pdt = 0x7f; /* not present, PQ=3, PDT=0x1f */
1407 else
1408 pq_pdt = (sdebug_ptype & 0x1f);
1409 arr[0] = pq_pdt;
1410 if (0x2 & cmd[1]) { /* CMDDT bit set */
1411 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 1);
1412 kfree(arr);
1413 return check_condition_result;
1414 } else if (0x1 & cmd[1]) { /* EVPD bit set */
1415 int lu_id_num, port_group_id, target_dev_id, len;
1416 char lu_id_str[6];
1417 int host_no = devip->sdbg_host->shost->host_no;
1418
1419 port_group_id = (((host_no + 1) & 0x7f) << 8) +
1420 (devip->channel & 0x7f);
1421 if (sdebug_vpd_use_hostno == 0)
1422 host_no = 0;
1423 lu_id_num = have_wlun ? -1 : (((host_no + 1) * 2000) +
1424 (devip->target * 1000) + devip->lun);
1425 target_dev_id = ((host_no + 1) * 2000) +
1426 (devip->target * 1000) - 3;
1427 len = scnprintf(lu_id_str, 6, "%d", lu_id_num);
1428 if (0 == cmd[2]) { /* supported vital product data pages */
1429 arr[1] = cmd[2]; /*sanity */
1430 n = 4;
1431 arr[n++] = 0x0; /* this page */
1432 arr[n++] = 0x80; /* unit serial number */
1433 arr[n++] = 0x83; /* device identification */
1434 arr[n++] = 0x84; /* software interface ident. */
1435 arr[n++] = 0x85; /* management network addresses */
1436 arr[n++] = 0x86; /* extended inquiry */
1437 arr[n++] = 0x87; /* mode page policy */
1438 arr[n++] = 0x88; /* SCSI ports */
1439 if (is_disk) { /* SBC only */
1440 arr[n++] = 0x89; /* ATA information */
1441 arr[n++] = 0xb0; /* Block limits */
1442 arr[n++] = 0xb1; /* Block characteristics */
1443 arr[n++] = 0xb2; /* Logical Block Prov */
1444 }
1445 arr[3] = n - 4; /* number of supported VPD pages */
1446 } else if (0x80 == cmd[2]) { /* unit serial number */
1447 arr[1] = cmd[2]; /*sanity */
1448 arr[3] = len;
1449 memcpy(&arr[4], lu_id_str, len);
1450 } else if (0x83 == cmd[2]) { /* device identification */
1451 arr[1] = cmd[2]; /*sanity */
1452 arr[3] = inquiry_vpd_83(&arr[4], port_group_id,
1453 target_dev_id, lu_id_num,
1454 lu_id_str, len,
1455 &devip->lu_name);
1456 } else if (0x84 == cmd[2]) { /* Software interface ident. */
1457 arr[1] = cmd[2]; /*sanity */
1458 arr[3] = inquiry_vpd_84(&arr[4]);
1459 } else if (0x85 == cmd[2]) { /* Management network addresses */
1460 arr[1] = cmd[2]; /*sanity */
1461 arr[3] = inquiry_vpd_85(&arr[4]);
1462 } else if (0x86 == cmd[2]) { /* extended inquiry */
1463 arr[1] = cmd[2]; /*sanity */
1464 arr[3] = 0x3c; /* number of following entries */
1465 if (sdebug_dif == T10_PI_TYPE3_PROTECTION)
1466 arr[4] = 0x4; /* SPT: GRD_CHK:1 */
1467 else if (have_dif_prot)
1468 arr[4] = 0x5; /* SPT: GRD_CHK:1, REF_CHK:1 */
1469 else
1470 arr[4] = 0x0; /* no protection stuff */
1471 arr[5] = 0x7; /* head of q, ordered + simple q's */
1472 } else if (0x87 == cmd[2]) { /* mode page policy */
1473 arr[1] = cmd[2]; /*sanity */
1474 arr[3] = 0x8; /* number of following entries */
1475 arr[4] = 0x2; /* disconnect-reconnect mp */
1476 arr[6] = 0x80; /* mlus, shared */
1477 arr[8] = 0x18; /* protocol specific lu */
1478 arr[10] = 0x82; /* mlus, per initiator port */
1479 } else if (0x88 == cmd[2]) { /* SCSI Ports */
1480 arr[1] = cmd[2]; /*sanity */
1481 arr[3] = inquiry_vpd_88(&arr[4], target_dev_id);
1482 } else if (is_disk && 0x89 == cmd[2]) { /* ATA information */
1483 arr[1] = cmd[2]; /*sanity */
1484 n = inquiry_vpd_89(&arr[4]);
1485 put_unaligned_be16(n, arr + 2);
1486 } else if (is_disk && 0xb0 == cmd[2]) { /* Block limits */
1487 arr[1] = cmd[2]; /*sanity */
1488 arr[3] = inquiry_vpd_b0(&arr[4]);
1489 } else if (is_disk && 0xb1 == cmd[2]) { /* Block char. */
1490 arr[1] = cmd[2]; /*sanity */
1491 arr[3] = inquiry_vpd_b1(&arr[4]);
1492 } else if (is_disk && 0xb2 == cmd[2]) { /* LB Prov. */
1493 arr[1] = cmd[2]; /*sanity */
1494 arr[3] = inquiry_vpd_b2(&arr[4]);
1495 } else {
1496 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, -1);
1497 kfree(arr);
1498 return check_condition_result;
1499 }
1500 len = min(get_unaligned_be16(arr + 2) + 4, alloc_len);
1501 ret = fill_from_dev_buffer(scp, arr,
1502 min(len, SDEBUG_MAX_INQ_ARR_SZ));
1503 kfree(arr);
1504 return ret;
1505 }
1506 /* drops through here for a standard inquiry */
1507 arr[1] = sdebug_removable ? 0x80 : 0; /* Removable disk */
1508 arr[2] = sdebug_scsi_level;
1509 arr[3] = 2; /* response_data_format==2 */
1510 arr[4] = SDEBUG_LONG_INQ_SZ - 5;
1511 arr[5] = (int)have_dif_prot; /* PROTECT bit */
1512 if (sdebug_vpd_use_hostno == 0)
1513 arr[5] |= 0x10; /* claim: implicit TPGS */
1514 arr[6] = 0x10; /* claim: MultiP */
1515 /* arr[6] |= 0x40; ... claim: EncServ (enclosure services) */
1516 arr[7] = 0xa; /* claim: LINKED + CMDQUE */
1517 memcpy(&arr[8], sdebug_inq_vendor_id, 8);
1518 memcpy(&arr[16], sdebug_inq_product_id, 16);
1519 memcpy(&arr[32], sdebug_inq_product_rev, 4);
1520 /* Use Vendor Specific area to place driver date in ASCII hex */
1521 memcpy(&arr[36], sdebug_version_date, 8);
1522 /* version descriptors (2 bytes each) follow */
1523 put_unaligned_be16(0xc0, arr + 58); /* SAM-6 no version claimed */
1524 put_unaligned_be16(0x5c0, arr + 60); /* SPC-5 no version claimed */
1525 n = 62;
1526 if (is_disk) { /* SBC-4 no version claimed */
1527 put_unaligned_be16(0x600, arr + n);
1528 n += 2;
1529 } else if (sdebug_ptype == TYPE_TAPE) { /* SSC-4 rev 3 */
1530 put_unaligned_be16(0x525, arr + n);
1531 n += 2;
1532 }
1533 put_unaligned_be16(0x2100, arr + n); /* SPL-4 no version claimed */
1534 ret = fill_from_dev_buffer(scp, arr,
1535 min(alloc_len, SDEBUG_LONG_INQ_SZ));
1536 kfree(arr);
1537 return ret;
1538}
1539
1540static unsigned char iec_m_pg[] = {0x1c, 0xa, 0x08, 0, 0, 0, 0, 0,
1541 0, 0, 0x0, 0x0};
1542
1543static int resp_requests(struct scsi_cmnd *scp,
1544 struct sdebug_dev_info *devip)
1545{
1546 unsigned char *sbuff;
1547 unsigned char *cmd = scp->cmnd;
1548 unsigned char arr[SCSI_SENSE_BUFFERSIZE];
1549 bool dsense;
1550 int len = 18;
1551
1552 memset(arr, 0, sizeof(arr));
1553 dsense = !!(cmd[1] & 1);
1554 sbuff = scp->sense_buffer;
1555 if ((iec_m_pg[2] & 0x4) && (6 == (iec_m_pg[3] & 0xf))) {
1556 if (dsense) {
1557 arr[0] = 0x72;
1558 arr[1] = 0x0; /* NO_SENSE in sense_key */
1559 arr[2] = THRESHOLD_EXCEEDED;
1560 arr[3] = 0xff; /* TEST set and MRIE==6 */
1561 len = 8;
1562 } else {
1563 arr[0] = 0x70;
1564 arr[2] = 0x0; /* NO_SENSE in sense_key */
1565 arr[7] = 0xa; /* 18 byte sense buffer */
1566 arr[12] = THRESHOLD_EXCEEDED;
1567 arr[13] = 0xff; /* TEST set and MRIE==6 */
1568 }
1569 } else {
1570 memcpy(arr, sbuff, SCSI_SENSE_BUFFERSIZE);
1571 if (arr[0] >= 0x70 && dsense == sdebug_dsense)
1572 ; /* have sense and formats match */
1573 else if (arr[0] <= 0x70) {
1574 if (dsense) {
1575 memset(arr, 0, 8);
1576 arr[0] = 0x72;
1577 len = 8;
1578 } else {
1579 memset(arr, 0, 18);
1580 arr[0] = 0x70;
1581 arr[7] = 0xa;
1582 }
1583 } else if (dsense) {
1584 memset(arr, 0, 8);
1585 arr[0] = 0x72;
1586 arr[1] = sbuff[2]; /* sense key */
1587 arr[2] = sbuff[12]; /* asc */
1588 arr[3] = sbuff[13]; /* ascq */
1589 len = 8;
1590 } else {
1591 memset(arr, 0, 18);
1592 arr[0] = 0x70;
1593 arr[2] = sbuff[1];
1594 arr[7] = 0xa;
1595 arr[12] = sbuff[1];
1596 arr[13] = sbuff[3];
1597 }
1598
1599 }
1600 mk_sense_buffer(scp, 0, NO_ADDITIONAL_SENSE, 0);
1601 return fill_from_dev_buffer(scp, arr, len);
1602}
1603
1604static int resp_start_stop(struct scsi_cmnd *scp,
1605 struct sdebug_dev_info *devip)
1606{
1607 unsigned char *cmd = scp->cmnd;
1608 int power_cond, stop;
1609 bool changing;
1610
1611 power_cond = (cmd[4] & 0xf0) >> 4;
1612 if (power_cond) {
1613 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 4, 7);
1614 return check_condition_result;
1615 }
1616 stop = !(cmd[4] & 1);
1617 changing = atomic_read(&devip->stopped) == !stop;
1618 atomic_xchg(&devip->stopped, stop);
1619 if (!changing || cmd[1] & 0x1) /* state unchanged or IMMED set */
1620 return SDEG_RES_IMMED_MASK;
1621 else
1622 return 0;
1623}
1624
1625static sector_t get_sdebug_capacity(void)
1626{
1627 static const unsigned int gibibyte = 1073741824;
1628
1629 if (sdebug_virtual_gb > 0)
1630 return (sector_t)sdebug_virtual_gb *
1631 (gibibyte / sdebug_sector_size);
1632 else
1633 return sdebug_store_sectors;
1634}
1635
1636#define SDEBUG_READCAP_ARR_SZ 8
1637static int resp_readcap(struct scsi_cmnd *scp,
1638 struct sdebug_dev_info *devip)
1639{
1640 unsigned char arr[SDEBUG_READCAP_ARR_SZ];
1641 unsigned int capac;
1642
1643 /* following just in case virtual_gb changed */
1644 sdebug_capacity = get_sdebug_capacity();
1645 memset(arr, 0, SDEBUG_READCAP_ARR_SZ);
1646 if (sdebug_capacity < 0xffffffff) {
1647 capac = (unsigned int)sdebug_capacity - 1;
1648 put_unaligned_be32(capac, arr + 0);
1649 } else
1650 put_unaligned_be32(0xffffffff, arr + 0);
1651 put_unaligned_be16(sdebug_sector_size, arr + 6);
1652 return fill_from_dev_buffer(scp, arr, SDEBUG_READCAP_ARR_SZ);
1653}
1654
1655#define SDEBUG_READCAP16_ARR_SZ 32
1656static int resp_readcap16(struct scsi_cmnd *scp,
1657 struct sdebug_dev_info *devip)
1658{
1659 unsigned char *cmd = scp->cmnd;
1660 unsigned char arr[SDEBUG_READCAP16_ARR_SZ];
1661 int alloc_len;
1662
1663 alloc_len = get_unaligned_be32(cmd + 10);
1664 /* following just in case virtual_gb changed */
1665 sdebug_capacity = get_sdebug_capacity();
1666 memset(arr, 0, SDEBUG_READCAP16_ARR_SZ);
1667 put_unaligned_be64((u64)(sdebug_capacity - 1), arr + 0);
1668 put_unaligned_be32(sdebug_sector_size, arr + 8);
1669 arr[13] = sdebug_physblk_exp & 0xf;
1670 arr[14] = (sdebug_lowest_aligned >> 8) & 0x3f;
1671
1672 if (scsi_debug_lbp()) {
1673 arr[14] |= 0x80; /* LBPME */
1674 /* from sbc4r07, this LBPRZ field is 1 bit, but the LBPRZ in
1675 * the LB Provisioning VPD page is 3 bits. Note that lbprz=2
1676 * in the wider field maps to 0 in this field.
1677 */
1678 if (sdebug_lbprz & 1) /* precisely what the draft requires */
1679 arr[14] |= 0x40;
1680 }
1681
1682 arr[15] = sdebug_lowest_aligned & 0xff;
1683
1684 if (have_dif_prot) {
1685 arr[12] = (sdebug_dif - 1) << 1; /* P_TYPE */
1686 arr[12] |= 1; /* PROT_EN */
1687 }
1688
1689 return fill_from_dev_buffer(scp, arr,
1690 min(alloc_len, SDEBUG_READCAP16_ARR_SZ));
1691}
1692
1693#define SDEBUG_MAX_TGTPGS_ARR_SZ 1412
1694
1695static int resp_report_tgtpgs(struct scsi_cmnd *scp,
1696 struct sdebug_dev_info *devip)
1697{
1698 unsigned char *cmd = scp->cmnd;
1699 unsigned char *arr;
1700 int host_no = devip->sdbg_host->shost->host_no;
1701 int n, ret, alen, rlen;
1702 int port_group_a, port_group_b, port_a, port_b;
1703
1704 alen = get_unaligned_be32(cmd + 6);
1705 arr = kzalloc(SDEBUG_MAX_TGTPGS_ARR_SZ, GFP_ATOMIC);
1706 if (! arr)
1707 return DID_REQUEUE << 16;
1708 /*
1709 * EVPD page 0x88 states we have two ports, one
1710 * real and a fake port with no device connected.
1711 * So we create two port groups with one port each
1712 * and set the group with port B to unavailable.
1713 */
1714 port_a = 0x1; /* relative port A */
1715 port_b = 0x2; /* relative port B */
1716 port_group_a = (((host_no + 1) & 0x7f) << 8) +
1717 (devip->channel & 0x7f);
1718 port_group_b = (((host_no + 1) & 0x7f) << 8) +
1719 (devip->channel & 0x7f) + 0x80;
1720
1721 /*
1722 * The asymmetric access state is cycled according to the host_id.
1723 */
1724 n = 4;
1725 if (sdebug_vpd_use_hostno == 0) {
1726 arr[n++] = host_no % 3; /* Asymm access state */
1727 arr[n++] = 0x0F; /* claim: all states are supported */
1728 } else {
1729 arr[n++] = 0x0; /* Active/Optimized path */
1730 arr[n++] = 0x01; /* only support active/optimized paths */
1731 }
1732 put_unaligned_be16(port_group_a, arr + n);
1733 n += 2;
1734 arr[n++] = 0; /* Reserved */
1735 arr[n++] = 0; /* Status code */
1736 arr[n++] = 0; /* Vendor unique */
1737 arr[n++] = 0x1; /* One port per group */
1738 arr[n++] = 0; /* Reserved */
1739 arr[n++] = 0; /* Reserved */
1740 put_unaligned_be16(port_a, arr + n);
1741 n += 2;
1742 arr[n++] = 3; /* Port unavailable */
1743 arr[n++] = 0x08; /* claim: only unavailalbe paths are supported */
1744 put_unaligned_be16(port_group_b, arr + n);
1745 n += 2;
1746 arr[n++] = 0; /* Reserved */
1747 arr[n++] = 0; /* Status code */
1748 arr[n++] = 0; /* Vendor unique */
1749 arr[n++] = 0x1; /* One port per group */
1750 arr[n++] = 0; /* Reserved */
1751 arr[n++] = 0; /* Reserved */
1752 put_unaligned_be16(port_b, arr + n);
1753 n += 2;
1754
1755 rlen = n - 4;
1756 put_unaligned_be32(rlen, arr + 0);
1757
1758 /*
1759 * Return the smallest value of either
1760 * - The allocated length
1761 * - The constructed command length
1762 * - The maximum array size
1763 */
1764 rlen = min(alen,n);
1765 ret = fill_from_dev_buffer(scp, arr,
1766 min(rlen, SDEBUG_MAX_TGTPGS_ARR_SZ));
1767 kfree(arr);
1768 return ret;
1769}
1770
1771static int resp_rsup_opcodes(struct scsi_cmnd *scp,
1772 struct sdebug_dev_info *devip)
1773{
1774 bool rctd;
1775 u8 reporting_opts, req_opcode, sdeb_i, supp;
1776 u16 req_sa, u;
1777 u32 alloc_len, a_len;
1778 int k, offset, len, errsts, count, bump, na;
1779 const struct opcode_info_t *oip;
1780 const struct opcode_info_t *r_oip;
1781 u8 *arr;
1782 u8 *cmd = scp->cmnd;
1783
1784 rctd = !!(cmd[2] & 0x80);
1785 reporting_opts = cmd[2] & 0x7;
1786 req_opcode = cmd[3];
1787 req_sa = get_unaligned_be16(cmd + 4);
1788 alloc_len = get_unaligned_be32(cmd + 6);
1789 if (alloc_len < 4 || alloc_len > 0xffff) {
1790 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 6, -1);
1791 return check_condition_result;
1792 }
1793 if (alloc_len > 8192)
1794 a_len = 8192;
1795 else
1796 a_len = alloc_len;
1797 arr = kzalloc((a_len < 256) ? 320 : a_len + 64, GFP_ATOMIC);
1798 if (NULL == arr) {
1799 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
1800 INSUFF_RES_ASCQ);
1801 return check_condition_result;
1802 }
1803 switch (reporting_opts) {
1804 case 0: /* all commands */
1805 /* count number of commands */
1806 for (count = 0, oip = opcode_info_arr;
1807 oip->num_attached != 0xff; ++oip) {
1808 if (F_INV_OP & oip->flags)
1809 continue;
1810 count += (oip->num_attached + 1);
1811 }
1812 bump = rctd ? 20 : 8;
1813 put_unaligned_be32(count * bump, arr);
1814 for (offset = 4, oip = opcode_info_arr;
1815 oip->num_attached != 0xff && offset < a_len; ++oip) {
1816 if (F_INV_OP & oip->flags)
1817 continue;
1818 na = oip->num_attached;
1819 arr[offset] = oip->opcode;
1820 put_unaligned_be16(oip->sa, arr + offset + 2);
1821 if (rctd)
1822 arr[offset + 5] |= 0x2;
1823 if (FF_SA & oip->flags)
1824 arr[offset + 5] |= 0x1;
1825 put_unaligned_be16(oip->len_mask[0], arr + offset + 6);
1826 if (rctd)
1827 put_unaligned_be16(0xa, arr + offset + 8);
1828 r_oip = oip;
1829 for (k = 0, oip = oip->arrp; k < na; ++k, ++oip) {
1830 if (F_INV_OP & oip->flags)
1831 continue;
1832 offset += bump;
1833 arr[offset] = oip->opcode;
1834 put_unaligned_be16(oip->sa, arr + offset + 2);
1835 if (rctd)
1836 arr[offset + 5] |= 0x2;
1837 if (FF_SA & oip->flags)
1838 arr[offset + 5] |= 0x1;
1839 put_unaligned_be16(oip->len_mask[0],
1840 arr + offset + 6);
1841 if (rctd)
1842 put_unaligned_be16(0xa,
1843 arr + offset + 8);
1844 }
1845 oip = r_oip;
1846 offset += bump;
1847 }
1848 break;
1849 case 1: /* one command: opcode only */
1850 case 2: /* one command: opcode plus service action */
1851 case 3: /* one command: if sa==0 then opcode only else opcode+sa */
1852 sdeb_i = opcode_ind_arr[req_opcode];
1853 oip = &opcode_info_arr[sdeb_i];
1854 if (F_INV_OP & oip->flags) {
1855 supp = 1;
1856 offset = 4;
1857 } else {
1858 if (1 == reporting_opts) {
1859 if (FF_SA & oip->flags) {
1860 mk_sense_invalid_fld(scp, SDEB_IN_CDB,
1861 2, 2);
1862 kfree(arr);
1863 return check_condition_result;
1864 }
1865 req_sa = 0;
1866 } else if (2 == reporting_opts &&
1867 0 == (FF_SA & oip->flags)) {
1868 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 4, -1);
1869 kfree(arr); /* point at requested sa */
1870 return check_condition_result;
1871 }
1872 if (0 == (FF_SA & oip->flags) &&
1873 req_opcode == oip->opcode)
1874 supp = 3;
1875 else if (0 == (FF_SA & oip->flags)) {
1876 na = oip->num_attached;
1877 for (k = 0, oip = oip->arrp; k < na;
1878 ++k, ++oip) {
1879 if (req_opcode == oip->opcode)
1880 break;
1881 }
1882 supp = (k >= na) ? 1 : 3;
1883 } else if (req_sa != oip->sa) {
1884 na = oip->num_attached;
1885 for (k = 0, oip = oip->arrp; k < na;
1886 ++k, ++oip) {
1887 if (req_sa == oip->sa)
1888 break;
1889 }
1890 supp = (k >= na) ? 1 : 3;
1891 } else
1892 supp = 3;
1893 if (3 == supp) {
1894 u = oip->len_mask[0];
1895 put_unaligned_be16(u, arr + 2);
1896 arr[4] = oip->opcode;
1897 for (k = 1; k < u; ++k)
1898 arr[4 + k] = (k < 16) ?
1899 oip->len_mask[k] : 0xff;
1900 offset = 4 + u;
1901 } else
1902 offset = 4;
1903 }
1904 arr[1] = (rctd ? 0x80 : 0) | supp;
1905 if (rctd) {
1906 put_unaligned_be16(0xa, arr + offset);
1907 offset += 12;
1908 }
1909 break;
1910 default:
1911 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 2);
1912 kfree(arr);
1913 return check_condition_result;
1914 }
1915 offset = (offset < a_len) ? offset : a_len;
1916 len = (offset < alloc_len) ? offset : alloc_len;
1917 errsts = fill_from_dev_buffer(scp, arr, len);
1918 kfree(arr);
1919 return errsts;
1920}
1921
1922static int resp_rsup_tmfs(struct scsi_cmnd *scp,
1923 struct sdebug_dev_info *devip)
1924{
1925 bool repd;
1926 u32 alloc_len, len;
1927 u8 arr[16];
1928 u8 *cmd = scp->cmnd;
1929
1930 memset(arr, 0, sizeof(arr));
1931 repd = !!(cmd[2] & 0x80);
1932 alloc_len = get_unaligned_be32(cmd + 6);
1933 if (alloc_len < 4) {
1934 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 6, -1);
1935 return check_condition_result;
1936 }
1937 arr[0] = 0xc8; /* ATS | ATSS | LURS */
1938 arr[1] = 0x1; /* ITNRS */
1939 if (repd) {
1940 arr[3] = 0xc;
1941 len = 16;
1942 } else
1943 len = 4;
1944
1945 len = (len < alloc_len) ? len : alloc_len;
1946 return fill_from_dev_buffer(scp, arr, len);
1947}
1948
1949/* <<Following mode page info copied from ST318451LW>> */
1950
1951static int resp_err_recov_pg(unsigned char *p, int pcontrol, int target)
1952{ /* Read-Write Error Recovery page for mode_sense */
1953 unsigned char err_recov_pg[] = {0x1, 0xa, 0xc0, 11, 240, 0, 0, 0,
1954 5, 0, 0xff, 0xff};
1955
1956 memcpy(p, err_recov_pg, sizeof(err_recov_pg));
1957 if (1 == pcontrol)
1958 memset(p + 2, 0, sizeof(err_recov_pg) - 2);
1959 return sizeof(err_recov_pg);
1960}
1961
1962static int resp_disconnect_pg(unsigned char *p, int pcontrol, int target)
1963{ /* Disconnect-Reconnect page for mode_sense */
1964 unsigned char disconnect_pg[] = {0x2, 0xe, 128, 128, 0, 10, 0, 0,
1965 0, 0, 0, 0, 0, 0, 0, 0};
1966
1967 memcpy(p, disconnect_pg, sizeof(disconnect_pg));
1968 if (1 == pcontrol)
1969 memset(p + 2, 0, sizeof(disconnect_pg) - 2);
1970 return sizeof(disconnect_pg);
1971}
1972
1973static int resp_format_pg(unsigned char *p, int pcontrol, int target)
1974{ /* Format device page for mode_sense */
1975 unsigned char format_pg[] = {0x3, 0x16, 0, 0, 0, 0, 0, 0,
1976 0, 0, 0, 0, 0, 0, 0, 0,
1977 0, 0, 0, 0, 0x40, 0, 0, 0};
1978
1979 memcpy(p, format_pg, sizeof(format_pg));
1980 put_unaligned_be16(sdebug_sectors_per, p + 10);
1981 put_unaligned_be16(sdebug_sector_size, p + 12);
1982 if (sdebug_removable)
1983 p[20] |= 0x20; /* should agree with INQUIRY */
1984 if (1 == pcontrol)
1985 memset(p + 2, 0, sizeof(format_pg) - 2);
1986 return sizeof(format_pg);
1987}
1988
1989static unsigned char caching_pg[] = {0x8, 18, 0x14, 0, 0xff, 0xff, 0, 0,
1990 0xff, 0xff, 0xff, 0xff, 0x80, 0x14, 0, 0,
1991 0, 0, 0, 0};
1992
1993static int resp_caching_pg(unsigned char *p, int pcontrol, int target)
1994{ /* Caching page for mode_sense */
1995 unsigned char ch_caching_pg[] = {/* 0x8, 18, */ 0x4, 0, 0, 0, 0, 0,
1996 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
1997 unsigned char d_caching_pg[] = {0x8, 18, 0x14, 0, 0xff, 0xff, 0, 0,
1998 0xff, 0xff, 0xff, 0xff, 0x80, 0x14, 0, 0, 0, 0, 0, 0};
1999
2000 if (SDEBUG_OPT_N_WCE & sdebug_opts)
2001 caching_pg[2] &= ~0x4; /* set WCE=0 (default WCE=1) */
2002 memcpy(p, caching_pg, sizeof(caching_pg));
2003 if (1 == pcontrol)
2004 memcpy(p + 2, ch_caching_pg, sizeof(ch_caching_pg));
2005 else if (2 == pcontrol)
2006 memcpy(p, d_caching_pg, sizeof(d_caching_pg));
2007 return sizeof(caching_pg);
2008}
2009
2010static unsigned char ctrl_m_pg[] = {0xa, 10, 2, 0, 0, 0, 0, 0,
2011 0, 0, 0x2, 0x4b};
2012
2013static int resp_ctrl_m_pg(unsigned char *p, int pcontrol, int target)
2014{ /* Control mode page for mode_sense */
2015 unsigned char ch_ctrl_m_pg[] = {/* 0xa, 10, */ 0x6, 0, 0, 0, 0, 0,
2016 0, 0, 0, 0};
2017 unsigned char d_ctrl_m_pg[] = {0xa, 10, 2, 0, 0, 0, 0, 0,
2018 0, 0, 0x2, 0x4b};
2019
2020 if (sdebug_dsense)
2021 ctrl_m_pg[2] |= 0x4;
2022 else
2023 ctrl_m_pg[2] &= ~0x4;
2024
2025 if (sdebug_ato)
2026 ctrl_m_pg[5] |= 0x80; /* ATO=1 */
2027
2028 memcpy(p, ctrl_m_pg, sizeof(ctrl_m_pg));
2029 if (1 == pcontrol)
2030 memcpy(p + 2, ch_ctrl_m_pg, sizeof(ch_ctrl_m_pg));
2031 else if (2 == pcontrol)
2032 memcpy(p, d_ctrl_m_pg, sizeof(d_ctrl_m_pg));
2033 return sizeof(ctrl_m_pg);
2034}
2035
2036
2037static int resp_iec_m_pg(unsigned char *p, int pcontrol, int target)
2038{ /* Informational Exceptions control mode page for mode_sense */
2039 unsigned char ch_iec_m_pg[] = {/* 0x1c, 0xa, */ 0x4, 0xf, 0, 0, 0, 0,
2040 0, 0, 0x0, 0x0};
2041 unsigned char d_iec_m_pg[] = {0x1c, 0xa, 0x08, 0, 0, 0, 0, 0,
2042 0, 0, 0x0, 0x0};
2043
2044 memcpy(p, iec_m_pg, sizeof(iec_m_pg));
2045 if (1 == pcontrol)
2046 memcpy(p + 2, ch_iec_m_pg, sizeof(ch_iec_m_pg));
2047 else if (2 == pcontrol)
2048 memcpy(p, d_iec_m_pg, sizeof(d_iec_m_pg));
2049 return sizeof(iec_m_pg);
2050}
2051
2052static int resp_sas_sf_m_pg(unsigned char *p, int pcontrol, int target)
2053{ /* SAS SSP mode page - short format for mode_sense */
2054 unsigned char sas_sf_m_pg[] = {0x19, 0x6,
2055 0x6, 0x0, 0x7, 0xd0, 0x0, 0x0};
2056
2057 memcpy(p, sas_sf_m_pg, sizeof(sas_sf_m_pg));
2058 if (1 == pcontrol)
2059 memset(p + 2, 0, sizeof(sas_sf_m_pg) - 2);
2060 return sizeof(sas_sf_m_pg);
2061}
2062
2063
2064static int resp_sas_pcd_m_spg(unsigned char *p, int pcontrol, int target,
2065 int target_dev_id)
2066{ /* SAS phy control and discover mode page for mode_sense */
2067 unsigned char sas_pcd_m_pg[] = {0x59, 0x1, 0, 0x64, 0, 0x6, 0, 2,
2068 0, 0, 0, 0, 0x10, 0x9, 0x8, 0x0,
2069 0, 0, 0, 0, 0, 0, 0, 0, /* insert SAS addr */
2070 0, 0, 0, 0, 0, 0, 0, 0, /* insert SAS addr */
2071 0x2, 0, 0, 0, 0, 0, 0, 0,
2072 0x88, 0x99, 0, 0, 0, 0, 0, 0,
2073 0, 0, 0, 0, 0, 0, 0, 0,
2074 0, 1, 0, 0, 0x10, 0x9, 0x8, 0x0,
2075 0, 0, 0, 0, 0, 0, 0, 0, /* insert SAS addr */
2076 0, 0, 0, 0, 0, 0, 0, 0, /* insert SAS addr */
2077 0x3, 0, 0, 0, 0, 0, 0, 0,
2078 0x88, 0x99, 0, 0, 0, 0, 0, 0,
2079 0, 0, 0, 0, 0, 0, 0, 0,
2080 };
2081 int port_a, port_b;
2082
2083 put_unaligned_be64(naa3_comp_a, sas_pcd_m_pg + 16);
2084 put_unaligned_be64(naa3_comp_c + 1, sas_pcd_m_pg + 24);
2085 put_unaligned_be64(naa3_comp_a, sas_pcd_m_pg + 64);
2086 put_unaligned_be64(naa3_comp_c + 1, sas_pcd_m_pg + 72);
2087 port_a = target_dev_id + 1;
2088 port_b = port_a + 1;
2089 memcpy(p, sas_pcd_m_pg, sizeof(sas_pcd_m_pg));
2090 put_unaligned_be32(port_a, p + 20);
2091 put_unaligned_be32(port_b, p + 48 + 20);
2092 if (1 == pcontrol)
2093 memset(p + 4, 0, sizeof(sas_pcd_m_pg) - 4);
2094 return sizeof(sas_pcd_m_pg);
2095}
2096
2097static int resp_sas_sha_m_spg(unsigned char *p, int pcontrol)
2098{ /* SAS SSP shared protocol specific port mode subpage */
2099 unsigned char sas_sha_m_pg[] = {0x59, 0x2, 0, 0xc, 0, 0x6, 0x10, 0,
2100 0, 0, 0, 0, 0, 0, 0, 0,
2101 };
2102
2103 memcpy(p, sas_sha_m_pg, sizeof(sas_sha_m_pg));
2104 if (1 == pcontrol)
2105 memset(p + 4, 0, sizeof(sas_sha_m_pg) - 4);
2106 return sizeof(sas_sha_m_pg);
2107}
2108
2109#define SDEBUG_MAX_MSENSE_SZ 256
2110
2111static int resp_mode_sense(struct scsi_cmnd *scp,
2112 struct sdebug_dev_info *devip)
2113{
2114 int pcontrol, pcode, subpcode, bd_len;
2115 unsigned char dev_spec;
2116 int alloc_len, offset, len, target_dev_id;
2117 int target = scp->device->id;
2118 unsigned char *ap;
2119 unsigned char arr[SDEBUG_MAX_MSENSE_SZ];
2120 unsigned char *cmd = scp->cmnd;
2121 bool dbd, llbaa, msense_6, is_disk, bad_pcode;
2122
2123 dbd = !!(cmd[1] & 0x8); /* disable block descriptors */
2124 pcontrol = (cmd[2] & 0xc0) >> 6;
2125 pcode = cmd[2] & 0x3f;
2126 subpcode = cmd[3];
2127 msense_6 = (MODE_SENSE == cmd[0]);
2128 llbaa = msense_6 ? false : !!(cmd[1] & 0x10);
2129 is_disk = (sdebug_ptype == TYPE_DISK);
2130 if (is_disk && !dbd)
2131 bd_len = llbaa ? 16 : 8;
2132 else
2133 bd_len = 0;
2134 alloc_len = msense_6 ? cmd[4] : get_unaligned_be16(cmd + 7);
2135 memset(arr, 0, SDEBUG_MAX_MSENSE_SZ);
2136 if (0x3 == pcontrol) { /* Saving values not supported */
2137 mk_sense_buffer(scp, ILLEGAL_REQUEST, SAVING_PARAMS_UNSUP, 0);
2138 return check_condition_result;
2139 }
2140 target_dev_id = ((devip->sdbg_host->shost->host_no + 1) * 2000) +
2141 (devip->target * 1000) - 3;
2142 /* for disks set DPOFUA bit and clear write protect (WP) bit */
2143 if (is_disk) {
2144 dev_spec = 0x10; /* =0x90 if WP=1 implies read-only */
2145 if (sdebug_wp)
2146 dev_spec |= 0x80;
2147 } else
2148 dev_spec = 0x0;
2149 if (msense_6) {
2150 arr[2] = dev_spec;
2151 arr[3] = bd_len;
2152 offset = 4;
2153 } else {
2154 arr[3] = dev_spec;
2155 if (16 == bd_len)
2156 arr[4] = 0x1; /* set LONGLBA bit */
2157 arr[7] = bd_len; /* assume 255 or less */
2158 offset = 8;
2159 }
2160 ap = arr + offset;
2161 if ((bd_len > 0) && (!sdebug_capacity))
2162 sdebug_capacity = get_sdebug_capacity();
2163
2164 if (8 == bd_len) {
2165 if (sdebug_capacity > 0xfffffffe)
2166 put_unaligned_be32(0xffffffff, ap + 0);
2167 else
2168 put_unaligned_be32(sdebug_capacity, ap + 0);
2169 put_unaligned_be16(sdebug_sector_size, ap + 6);
2170 offset += bd_len;
2171 ap = arr + offset;
2172 } else if (16 == bd_len) {
2173 put_unaligned_be64((u64)sdebug_capacity, ap + 0);
2174 put_unaligned_be32(sdebug_sector_size, ap + 12);
2175 offset += bd_len;
2176 ap = arr + offset;
2177 }
2178
2179 if ((subpcode > 0x0) && (subpcode < 0xff) && (0x19 != pcode)) {
2180 /* TODO: Control Extension page */
2181 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1);
2182 return check_condition_result;
2183 }
2184 bad_pcode = false;
2185
2186 switch (pcode) {
2187 case 0x1: /* Read-Write error recovery page, direct access */
2188 len = resp_err_recov_pg(ap, pcontrol, target);
2189 offset += len;
2190 break;
2191 case 0x2: /* Disconnect-Reconnect page, all devices */
2192 len = resp_disconnect_pg(ap, pcontrol, target);
2193 offset += len;
2194 break;
2195 case 0x3: /* Format device page, direct access */
2196 if (is_disk) {
2197 len = resp_format_pg(ap, pcontrol, target);
2198 offset += len;
2199 } else
2200 bad_pcode = true;
2201 break;
2202 case 0x8: /* Caching page, direct access */
2203 if (is_disk) {
2204 len = resp_caching_pg(ap, pcontrol, target);
2205 offset += len;
2206 } else
2207 bad_pcode = true;
2208 break;
2209 case 0xa: /* Control Mode page, all devices */
2210 len = resp_ctrl_m_pg(ap, pcontrol, target);
2211 offset += len;
2212 break;
2213 case 0x19: /* if spc==1 then sas phy, control+discover */
2214 if ((subpcode > 0x2) && (subpcode < 0xff)) {
2215 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1);
2216 return check_condition_result;
2217 }
2218 len = 0;
2219 if ((0x0 == subpcode) || (0xff == subpcode))
2220 len += resp_sas_sf_m_pg(ap + len, pcontrol, target);
2221 if ((0x1 == subpcode) || (0xff == subpcode))
2222 len += resp_sas_pcd_m_spg(ap + len, pcontrol, target,
2223 target_dev_id);
2224 if ((0x2 == subpcode) || (0xff == subpcode))
2225 len += resp_sas_sha_m_spg(ap + len, pcontrol);
2226 offset += len;
2227 break;
2228 case 0x1c: /* Informational Exceptions Mode page, all devices */
2229 len = resp_iec_m_pg(ap, pcontrol, target);
2230 offset += len;
2231 break;
2232 case 0x3f: /* Read all Mode pages */
2233 if ((0 == subpcode) || (0xff == subpcode)) {
2234 len = resp_err_recov_pg(ap, pcontrol, target);
2235 len += resp_disconnect_pg(ap + len, pcontrol, target);
2236 if (is_disk) {
2237 len += resp_format_pg(ap + len, pcontrol,
2238 target);
2239 len += resp_caching_pg(ap + len, pcontrol,
2240 target);
2241 }
2242 len += resp_ctrl_m_pg(ap + len, pcontrol, target);
2243 len += resp_sas_sf_m_pg(ap + len, pcontrol, target);
2244 if (0xff == subpcode) {
2245 len += resp_sas_pcd_m_spg(ap + len, pcontrol,
2246 target, target_dev_id);
2247 len += resp_sas_sha_m_spg(ap + len, pcontrol);
2248 }
2249 len += resp_iec_m_pg(ap + len, pcontrol, target);
2250 offset += len;
2251 } else {
2252 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1);
2253 return check_condition_result;
2254 }
2255 break;
2256 default:
2257 bad_pcode = true;
2258 break;
2259 }
2260 if (bad_pcode) {
2261 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 5);
2262 return check_condition_result;
2263 }
2264 if (msense_6)
2265 arr[0] = offset - 1;
2266 else
2267 put_unaligned_be16((offset - 2), arr + 0);
2268 return fill_from_dev_buffer(scp, arr, min(alloc_len, offset));
2269}
2270
2271#define SDEBUG_MAX_MSELECT_SZ 512
2272
2273static int resp_mode_select(struct scsi_cmnd *scp,
2274 struct sdebug_dev_info *devip)
2275{
2276 int pf, sp, ps, md_len, bd_len, off, spf, pg_len;
2277 int param_len, res, mpage;
2278 unsigned char arr[SDEBUG_MAX_MSELECT_SZ];
2279 unsigned char *cmd = scp->cmnd;
2280 int mselect6 = (MODE_SELECT == cmd[0]);
2281
2282 memset(arr, 0, sizeof(arr));
2283 pf = cmd[1] & 0x10;
2284 sp = cmd[1] & 0x1;
2285 param_len = mselect6 ? cmd[4] : get_unaligned_be16(cmd + 7);
2286 if ((0 == pf) || sp || (param_len > SDEBUG_MAX_MSELECT_SZ)) {
2287 mk_sense_invalid_fld(scp, SDEB_IN_CDB, mselect6 ? 4 : 7, -1);
2288 return check_condition_result;
2289 }
2290 res = fetch_to_dev_buffer(scp, arr, param_len);
2291 if (-1 == res)
2292 return DID_ERROR << 16;
2293 else if (sdebug_verbose && (res < param_len))
2294 sdev_printk(KERN_INFO, scp->device,
2295 "%s: cdb indicated=%d, IO sent=%d bytes\n",
2296 __func__, param_len, res);
2297 md_len = mselect6 ? (arr[0] + 1) : (get_unaligned_be16(arr + 0) + 2);
2298 bd_len = mselect6 ? arr[3] : get_unaligned_be16(arr + 6);
2299 if (md_len > 2) {
2300 mk_sense_invalid_fld(scp, SDEB_IN_DATA, 0, -1);
2301 return check_condition_result;
2302 }
2303 off = bd_len + (mselect6 ? 4 : 8);
2304 mpage = arr[off] & 0x3f;
2305 ps = !!(arr[off] & 0x80);
2306 if (ps) {
2307 mk_sense_invalid_fld(scp, SDEB_IN_DATA, off, 7);
2308 return check_condition_result;
2309 }
2310 spf = !!(arr[off] & 0x40);
2311 pg_len = spf ? (get_unaligned_be16(arr + off + 2) + 4) :
2312 (arr[off + 1] + 2);
2313 if ((pg_len + off) > param_len) {
2314 mk_sense_buffer(scp, ILLEGAL_REQUEST,
2315 PARAMETER_LIST_LENGTH_ERR, 0);
2316 return check_condition_result;
2317 }
2318 switch (mpage) {
2319 case 0x8: /* Caching Mode page */
2320 if (caching_pg[1] == arr[off + 1]) {
2321 memcpy(caching_pg + 2, arr + off + 2,
2322 sizeof(caching_pg) - 2);
2323 goto set_mode_changed_ua;
2324 }
2325 break;
2326 case 0xa: /* Control Mode page */
2327 if (ctrl_m_pg[1] == arr[off + 1]) {
2328 memcpy(ctrl_m_pg + 2, arr + off + 2,
2329 sizeof(ctrl_m_pg) - 2);
2330 if (ctrl_m_pg[4] & 0x8)
2331 sdebug_wp = true;
2332 else
2333 sdebug_wp = false;
2334 sdebug_dsense = !!(ctrl_m_pg[2] & 0x4);
2335 goto set_mode_changed_ua;
2336 }
2337 break;
2338 case 0x1c: /* Informational Exceptions Mode page */
2339 if (iec_m_pg[1] == arr[off + 1]) {
2340 memcpy(iec_m_pg + 2, arr + off + 2,
2341 sizeof(iec_m_pg) - 2);
2342 goto set_mode_changed_ua;
2343 }
2344 break;
2345 default:
2346 break;
2347 }
2348 mk_sense_invalid_fld(scp, SDEB_IN_DATA, off, 5);
2349 return check_condition_result;
2350set_mode_changed_ua:
2351 set_bit(SDEBUG_UA_MODE_CHANGED, devip->uas_bm);
2352 return 0;
2353}
2354
2355static int resp_temp_l_pg(unsigned char *arr)
2356{
2357 unsigned char temp_l_pg[] = {0x0, 0x0, 0x3, 0x2, 0x0, 38,
2358 0x0, 0x1, 0x3, 0x2, 0x0, 65,
2359 };
2360
2361 memcpy(arr, temp_l_pg, sizeof(temp_l_pg));
2362 return sizeof(temp_l_pg);
2363}
2364
2365static int resp_ie_l_pg(unsigned char *arr)
2366{
2367 unsigned char ie_l_pg[] = {0x0, 0x0, 0x3, 0x3, 0x0, 0x0, 38,
2368 };
2369
2370 memcpy(arr, ie_l_pg, sizeof(ie_l_pg));
2371 if (iec_m_pg[2] & 0x4) { /* TEST bit set */
2372 arr[4] = THRESHOLD_EXCEEDED;
2373 arr[5] = 0xff;
2374 }
2375 return sizeof(ie_l_pg);
2376}
2377
2378#define SDEBUG_MAX_LSENSE_SZ 512
2379
2380static int resp_log_sense(struct scsi_cmnd *scp,
2381 struct sdebug_dev_info *devip)
2382{
2383 int ppc, sp, pcode, subpcode, alloc_len, len, n;
2384 unsigned char arr[SDEBUG_MAX_LSENSE_SZ];
2385 unsigned char *cmd = scp->cmnd;
2386
2387 memset(arr, 0, sizeof(arr));
2388 ppc = cmd[1] & 0x2;
2389 sp = cmd[1] & 0x1;
2390 if (ppc || sp) {
2391 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, ppc ? 1 : 0);
2392 return check_condition_result;
2393 }
2394 pcode = cmd[2] & 0x3f;
2395 subpcode = cmd[3] & 0xff;
2396 alloc_len = get_unaligned_be16(cmd + 7);
2397 arr[0] = pcode;
2398 if (0 == subpcode) {
2399 switch (pcode) {
2400 case 0x0: /* Supported log pages log page */
2401 n = 4;
2402 arr[n++] = 0x0; /* this page */
2403 arr[n++] = 0xd; /* Temperature */
2404 arr[n++] = 0x2f; /* Informational exceptions */
2405 arr[3] = n - 4;
2406 break;
2407 case 0xd: /* Temperature log page */
2408 arr[3] = resp_temp_l_pg(arr + 4);
2409 break;
2410 case 0x2f: /* Informational exceptions log page */
2411 arr[3] = resp_ie_l_pg(arr + 4);
2412 break;
2413 default:
2414 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 5);
2415 return check_condition_result;
2416 }
2417 } else if (0xff == subpcode) {
2418 arr[0] |= 0x40;
2419 arr[1] = subpcode;
2420 switch (pcode) {
2421 case 0x0: /* Supported log pages and subpages log page */
2422 n = 4;
2423 arr[n++] = 0x0;
2424 arr[n++] = 0x0; /* 0,0 page */
2425 arr[n++] = 0x0;
2426 arr[n++] = 0xff; /* this page */
2427 arr[n++] = 0xd;
2428 arr[n++] = 0x0; /* Temperature */
2429 arr[n++] = 0x2f;
2430 arr[n++] = 0x0; /* Informational exceptions */
2431 arr[3] = n - 4;
2432 break;
2433 case 0xd: /* Temperature subpages */
2434 n = 4;
2435 arr[n++] = 0xd;
2436 arr[n++] = 0x0; /* Temperature */
2437 arr[3] = n - 4;
2438 break;
2439 case 0x2f: /* Informational exceptions subpages */
2440 n = 4;
2441 arr[n++] = 0x2f;
2442 arr[n++] = 0x0; /* Informational exceptions */
2443 arr[3] = n - 4;
2444 break;
2445 default:
2446 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 5);
2447 return check_condition_result;
2448 }
2449 } else {
2450 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1);
2451 return check_condition_result;
2452 }
2453 len = min(get_unaligned_be16(arr + 2) + 4, alloc_len);
2454 return fill_from_dev_buffer(scp, arr,
2455 min(len, SDEBUG_MAX_INQ_ARR_SZ));
2456}
2457
2458static inline int check_device_access_params(struct scsi_cmnd *scp,
2459 unsigned long long lba, unsigned int num, bool write)
2460{
2461 if (lba + num > sdebug_capacity) {
2462 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
2463 return check_condition_result;
2464 }
2465 /* transfer length excessive (tie in to block limits VPD page) */
2466 if (num > sdebug_store_sectors) {
2467 /* needs work to find which cdb byte 'num' comes from */
2468 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
2469 return check_condition_result;
2470 }
2471 if (write && unlikely(sdebug_wp)) {
2472 mk_sense_buffer(scp, DATA_PROTECT, WRITE_PROTECTED, 0x2);
2473 return check_condition_result;
2474 }
2475 return 0;
2476}
2477
2478/* Returns number of bytes copied or -1 if error. */
2479static int do_device_access(struct scsi_cmnd *scmd, u32 sg_skip, u64 lba,
2480 u32 num, bool do_write)
2481{
2482 int ret;
2483 u64 block, rest = 0;
2484 struct scsi_data_buffer *sdb = &scmd->sdb;
2485 enum dma_data_direction dir;
2486
2487 if (do_write) {
2488 dir = DMA_TO_DEVICE;
2489 write_since_sync = true;
2490 } else {
2491 dir = DMA_FROM_DEVICE;
2492 }
2493
2494 if (!sdb->length)
2495 return 0;
2496 if (scmd->sc_data_direction != dir)
2497 return -1;
2498
2499 block = do_div(lba, sdebug_store_sectors);
2500 if (block + num > sdebug_store_sectors)
2501 rest = block + num - sdebug_store_sectors;
2502
2503 ret = sg_copy_buffer(sdb->table.sgl, sdb->table.nents,
2504 fake_storep + (block * sdebug_sector_size),
2505 (num - rest) * sdebug_sector_size, sg_skip, do_write);
2506 if (ret != (num - rest) * sdebug_sector_size)
2507 return ret;
2508
2509 if (rest) {
2510 ret += sg_copy_buffer(sdb->table.sgl, sdb->table.nents,
2511 fake_storep, rest * sdebug_sector_size,
2512 sg_skip + ((num - rest) * sdebug_sector_size),
2513 do_write);
2514 }
2515
2516 return ret;
2517}
2518
2519/* If lba2fake_store(lba,num) compares equal to arr(num), then copy top half of
2520 * arr into lba2fake_store(lba,num) and return true. If comparison fails then
2521 * return false. */
2522static bool comp_write_worker(u64 lba, u32 num, const u8 *arr)
2523{
2524 bool res;
2525 u64 block, rest = 0;
2526 u32 store_blks = sdebug_store_sectors;
2527 u32 lb_size = sdebug_sector_size;
2528
2529 block = do_div(lba, store_blks);
2530 if (block + num > store_blks)
2531 rest = block + num - store_blks;
2532
2533 res = !memcmp(fake_storep + (block * lb_size), arr,
2534 (num - rest) * lb_size);
2535 if (!res)
2536 return res;
2537 if (rest)
2538 res = memcmp(fake_storep, arr + ((num - rest) * lb_size),
2539 rest * lb_size);
2540 if (!res)
2541 return res;
2542 arr += num * lb_size;
2543 memcpy(fake_storep + (block * lb_size), arr, (num - rest) * lb_size);
2544 if (rest)
2545 memcpy(fake_storep, arr + ((num - rest) * lb_size),
2546 rest * lb_size);
2547 return res;
2548}
2549
2550static __be16 dif_compute_csum(const void *buf, int len)
2551{
2552 __be16 csum;
2553
2554 if (sdebug_guard)
2555 csum = (__force __be16)ip_compute_csum(buf, len);
2556 else
2557 csum = cpu_to_be16(crc_t10dif(buf, len));
2558
2559 return csum;
2560}
2561
2562static int dif_verify(struct t10_pi_tuple *sdt, const void *data,
2563 sector_t sector, u32 ei_lba)
2564{
2565 __be16 csum = dif_compute_csum(data, sdebug_sector_size);
2566
2567 if (sdt->guard_tag != csum) {
2568 pr_err("GUARD check failed on sector %lu rcvd 0x%04x, data 0x%04x\n",
2569 (unsigned long)sector,
2570 be16_to_cpu(sdt->guard_tag),
2571 be16_to_cpu(csum));
2572 return 0x01;
2573 }
2574 if (sdebug_dif == T10_PI_TYPE1_PROTECTION &&
2575 be32_to_cpu(sdt->ref_tag) != (sector & 0xffffffff)) {
2576 pr_err("REF check failed on sector %lu\n",
2577 (unsigned long)sector);
2578 return 0x03;
2579 }
2580 if (sdebug_dif == T10_PI_TYPE2_PROTECTION &&
2581 be32_to_cpu(sdt->ref_tag) != ei_lba) {
2582 pr_err("REF check failed on sector %lu\n",
2583 (unsigned long)sector);
2584 return 0x03;
2585 }
2586 return 0;
2587}
2588
2589static void dif_copy_prot(struct scsi_cmnd *SCpnt, sector_t sector,
2590 unsigned int sectors, bool read)
2591{
2592 size_t resid;
2593 void *paddr;
2594 const void *dif_store_end = dif_storep + sdebug_store_sectors;
2595 struct sg_mapping_iter miter;
2596
2597 /* Bytes of protection data to copy into sgl */
2598 resid = sectors * sizeof(*dif_storep);
2599
2600 sg_miter_start(&miter, scsi_prot_sglist(SCpnt),
2601 scsi_prot_sg_count(SCpnt), SG_MITER_ATOMIC |
2602 (read ? SG_MITER_TO_SG : SG_MITER_FROM_SG));
2603
2604 while (sg_miter_next(&miter) && resid > 0) {
2605 size_t len = min(miter.length, resid);
2606 void *start = dif_store(sector);
2607 size_t rest = 0;
2608
2609 if (dif_store_end < start + len)
2610 rest = start + len - dif_store_end;
2611
2612 paddr = miter.addr;
2613
2614 if (read)
2615 memcpy(paddr, start, len - rest);
2616 else
2617 memcpy(start, paddr, len - rest);
2618
2619 if (rest) {
2620 if (read)
2621 memcpy(paddr + len - rest, dif_storep, rest);
2622 else
2623 memcpy(dif_storep, paddr + len - rest, rest);
2624 }
2625
2626 sector += len / sizeof(*dif_storep);
2627 resid -= len;
2628 }
2629 sg_miter_stop(&miter);
2630}
2631
2632static int prot_verify_read(struct scsi_cmnd *SCpnt, sector_t start_sec,
2633 unsigned int sectors, u32 ei_lba)
2634{
2635 unsigned int i;
2636 struct t10_pi_tuple *sdt;
2637 sector_t sector;
2638
2639 for (i = 0; i < sectors; i++, ei_lba++) {
2640 int ret;
2641
2642 sector = start_sec + i;
2643 sdt = dif_store(sector);
2644
2645 if (sdt->app_tag == cpu_to_be16(0xffff))
2646 continue;
2647
2648 ret = dif_verify(sdt, lba2fake_store(sector), sector, ei_lba);
2649 if (ret) {
2650 dif_errors++;
2651 return ret;
2652 }
2653 }
2654
2655 dif_copy_prot(SCpnt, start_sec, sectors, true);
2656 dix_reads++;
2657
2658 return 0;
2659}
2660
2661static int resp_read_dt0(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
2662{
2663 u8 *cmd = scp->cmnd;
2664 struct sdebug_queued_cmd *sqcp;
2665 u64 lba;
2666 u32 num;
2667 u32 ei_lba;
2668 unsigned long iflags;
2669 int ret;
2670 bool check_prot;
2671
2672 switch (cmd[0]) {
2673 case READ_16:
2674 ei_lba = 0;
2675 lba = get_unaligned_be64(cmd + 2);
2676 num = get_unaligned_be32(cmd + 10);
2677 check_prot = true;
2678 break;
2679 case READ_10:
2680 ei_lba = 0;
2681 lba = get_unaligned_be32(cmd + 2);
2682 num = get_unaligned_be16(cmd + 7);
2683 check_prot = true;
2684 break;
2685 case READ_6:
2686 ei_lba = 0;
2687 lba = (u32)cmd[3] | (u32)cmd[2] << 8 |
2688 (u32)(cmd[1] & 0x1f) << 16;
2689 num = (0 == cmd[4]) ? 256 : cmd[4];
2690 check_prot = true;
2691 break;
2692 case READ_12:
2693 ei_lba = 0;
2694 lba = get_unaligned_be32(cmd + 2);
2695 num = get_unaligned_be32(cmd + 6);
2696 check_prot = true;
2697 break;
2698 case XDWRITEREAD_10:
2699 ei_lba = 0;
2700 lba = get_unaligned_be32(cmd + 2);
2701 num = get_unaligned_be16(cmd + 7);
2702 check_prot = false;
2703 break;
2704 default: /* assume READ(32) */
2705 lba = get_unaligned_be64(cmd + 12);
2706 ei_lba = get_unaligned_be32(cmd + 20);
2707 num = get_unaligned_be32(cmd + 28);
2708 check_prot = false;
2709 break;
2710 }
2711 if (unlikely(have_dif_prot && check_prot)) {
2712 if (sdebug_dif == T10_PI_TYPE2_PROTECTION &&
2713 (cmd[1] & 0xe0)) {
2714 mk_sense_invalid_opcode(scp);
2715 return check_condition_result;
2716 }
2717 if ((sdebug_dif == T10_PI_TYPE1_PROTECTION ||
2718 sdebug_dif == T10_PI_TYPE3_PROTECTION) &&
2719 (cmd[1] & 0xe0) == 0)
2720 sdev_printk(KERN_ERR, scp->device, "Unprotected RD "
2721 "to DIF device\n");
2722 }
2723 if (unlikely(sdebug_any_injecting_opt)) {
2724 sqcp = (struct sdebug_queued_cmd *)scp->host_scribble;
2725
2726 if (sqcp) {
2727 if (sqcp->inj_short)
2728 num /= 2;
2729 }
2730 } else
2731 sqcp = NULL;
2732
2733 ret = check_device_access_params(scp, lba, num, false);
2734 if (ret)
2735 return ret;
2736 if (unlikely((SDEBUG_OPT_MEDIUM_ERR & sdebug_opts) &&
2737 (lba <= (sdebug_medium_error_start + sdebug_medium_error_count - 1)) &&
2738 ((lba + num) > sdebug_medium_error_start))) {
2739 /* claim unrecoverable read error */
2740 mk_sense_buffer(scp, MEDIUM_ERROR, UNRECOVERED_READ_ERR, 0);
2741 /* set info field and valid bit for fixed descriptor */
2742 if (0x70 == (scp->sense_buffer[0] & 0x7f)) {
2743 scp->sense_buffer[0] |= 0x80; /* Valid bit */
2744 ret = (lba < OPT_MEDIUM_ERR_ADDR)
2745 ? OPT_MEDIUM_ERR_ADDR : (int)lba;
2746 put_unaligned_be32(ret, scp->sense_buffer + 3);
2747 }
2748 scsi_set_resid(scp, scsi_bufflen(scp));
2749 return check_condition_result;
2750 }
2751
2752 read_lock_irqsave(&atomic_rw, iflags);
2753
2754 /* DIX + T10 DIF */
2755 if (unlikely(sdebug_dix && scsi_prot_sg_count(scp))) {
2756 int prot_ret = prot_verify_read(scp, lba, num, ei_lba);
2757
2758 if (prot_ret) {
2759 read_unlock_irqrestore(&atomic_rw, iflags);
2760 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, prot_ret);
2761 return illegal_condition_result;
2762 }
2763 }
2764
2765 ret = do_device_access(scp, 0, lba, num, false);
2766 read_unlock_irqrestore(&atomic_rw, iflags);
2767 if (unlikely(ret == -1))
2768 return DID_ERROR << 16;
2769
2770 scsi_set_resid(scp, scsi_bufflen(scp) - ret);
2771
2772 if (unlikely(sqcp)) {
2773 if (sqcp->inj_recovered) {
2774 mk_sense_buffer(scp, RECOVERED_ERROR,
2775 THRESHOLD_EXCEEDED, 0);
2776 return check_condition_result;
2777 } else if (sqcp->inj_transport) {
2778 mk_sense_buffer(scp, ABORTED_COMMAND,
2779 TRANSPORT_PROBLEM, ACK_NAK_TO);
2780 return check_condition_result;
2781 } else if (sqcp->inj_dif) {
2782 /* Logical block guard check failed */
2783 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 1);
2784 return illegal_condition_result;
2785 } else if (sqcp->inj_dix) {
2786 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 1);
2787 return illegal_condition_result;
2788 }
2789 }
2790 return 0;
2791}
2792
2793static void dump_sector(unsigned char *buf, int len)
2794{
2795 int i, j, n;
2796
2797 pr_err(">>> Sector Dump <<<\n");
2798 for (i = 0 ; i < len ; i += 16) {
2799 char b[128];
2800
2801 for (j = 0, n = 0; j < 16; j++) {
2802 unsigned char c = buf[i+j];
2803
2804 if (c >= 0x20 && c < 0x7e)
2805 n += scnprintf(b + n, sizeof(b) - n,
2806 " %c ", buf[i+j]);
2807 else
2808 n += scnprintf(b + n, sizeof(b) - n,
2809 "%02x ", buf[i+j]);
2810 }
2811 pr_err("%04d: %s\n", i, b);
2812 }
2813}
2814
2815static int prot_verify_write(struct scsi_cmnd *SCpnt, sector_t start_sec,
2816 unsigned int sectors, u32 ei_lba)
2817{
2818 int ret;
2819 struct t10_pi_tuple *sdt;
2820 void *daddr;
2821 sector_t sector = start_sec;
2822 int ppage_offset;
2823 int dpage_offset;
2824 struct sg_mapping_iter diter;
2825 struct sg_mapping_iter piter;
2826
2827 BUG_ON(scsi_sg_count(SCpnt) == 0);
2828 BUG_ON(scsi_prot_sg_count(SCpnt) == 0);
2829
2830 sg_miter_start(&piter, scsi_prot_sglist(SCpnt),
2831 scsi_prot_sg_count(SCpnt),
2832 SG_MITER_ATOMIC | SG_MITER_FROM_SG);
2833 sg_miter_start(&diter, scsi_sglist(SCpnt), scsi_sg_count(SCpnt),
2834 SG_MITER_ATOMIC | SG_MITER_FROM_SG);
2835
2836 /* For each protection page */
2837 while (sg_miter_next(&piter)) {
2838 dpage_offset = 0;
2839 if (WARN_ON(!sg_miter_next(&diter))) {
2840 ret = 0x01;
2841 goto out;
2842 }
2843
2844 for (ppage_offset = 0; ppage_offset < piter.length;
2845 ppage_offset += sizeof(struct t10_pi_tuple)) {
2846 /* If we're at the end of the current
2847 * data page advance to the next one
2848 */
2849 if (dpage_offset >= diter.length) {
2850 if (WARN_ON(!sg_miter_next(&diter))) {
2851 ret = 0x01;
2852 goto out;
2853 }
2854 dpage_offset = 0;
2855 }
2856
2857 sdt = piter.addr + ppage_offset;
2858 daddr = diter.addr + dpage_offset;
2859
2860 ret = dif_verify(sdt, daddr, sector, ei_lba);
2861 if (ret) {
2862 dump_sector(daddr, sdebug_sector_size);
2863 goto out;
2864 }
2865
2866 sector++;
2867 ei_lba++;
2868 dpage_offset += sdebug_sector_size;
2869 }
2870 diter.consumed = dpage_offset;
2871 sg_miter_stop(&diter);
2872 }
2873 sg_miter_stop(&piter);
2874
2875 dif_copy_prot(SCpnt, start_sec, sectors, false);
2876 dix_writes++;
2877
2878 return 0;
2879
2880out:
2881 dif_errors++;
2882 sg_miter_stop(&diter);
2883 sg_miter_stop(&piter);
2884 return ret;
2885}
2886
2887static unsigned long lba_to_map_index(sector_t lba)
2888{
2889 if (sdebug_unmap_alignment)
2890 lba += sdebug_unmap_granularity - sdebug_unmap_alignment;
2891 sector_div(lba, sdebug_unmap_granularity);
2892 return lba;
2893}
2894
2895static sector_t map_index_to_lba(unsigned long index)
2896{
2897 sector_t lba = index * sdebug_unmap_granularity;
2898
2899 if (sdebug_unmap_alignment)
2900 lba -= sdebug_unmap_granularity - sdebug_unmap_alignment;
2901 return lba;
2902}
2903
2904static unsigned int map_state(sector_t lba, unsigned int *num)
2905{
2906 sector_t end;
2907 unsigned int mapped;
2908 unsigned long index;
2909 unsigned long next;
2910
2911 index = lba_to_map_index(lba);
2912 mapped = test_bit(index, map_storep);
2913
2914 if (mapped)
2915 next = find_next_zero_bit(map_storep, map_size, index);
2916 else
2917 next = find_next_bit(map_storep, map_size, index);
2918
2919 end = min_t(sector_t, sdebug_store_sectors, map_index_to_lba(next));
2920 *num = end - lba;
2921 return mapped;
2922}
2923
2924static void map_region(sector_t lba, unsigned int len)
2925{
2926 sector_t end = lba + len;
2927
2928 while (lba < end) {
2929 unsigned long index = lba_to_map_index(lba);
2930
2931 if (index < map_size)
2932 set_bit(index, map_storep);
2933
2934 lba = map_index_to_lba(index + 1);
2935 }
2936}
2937
2938static void unmap_region(sector_t lba, unsigned int len)
2939{
2940 sector_t end = lba + len;
2941
2942 while (lba < end) {
2943 unsigned long index = lba_to_map_index(lba);
2944
2945 if (lba == map_index_to_lba(index) &&
2946 lba + sdebug_unmap_granularity <= end &&
2947 index < map_size) {
2948 clear_bit(index, map_storep);
2949 if (sdebug_lbprz) { /* for LBPRZ=2 return 0xff_s */
2950 memset(fake_storep +
2951 lba * sdebug_sector_size,
2952 (sdebug_lbprz & 1) ? 0 : 0xff,
2953 sdebug_sector_size *
2954 sdebug_unmap_granularity);
2955 }
2956 if (dif_storep) {
2957 memset(dif_storep + lba, 0xff,
2958 sizeof(*dif_storep) *
2959 sdebug_unmap_granularity);
2960 }
2961 }
2962 lba = map_index_to_lba(index + 1);
2963 }
2964}
2965
2966static int resp_write_dt0(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
2967{
2968 u8 *cmd = scp->cmnd;
2969 u64 lba;
2970 u32 num;
2971 u32 ei_lba;
2972 unsigned long iflags;
2973 int ret;
2974 bool check_prot;
2975
2976 switch (cmd[0]) {
2977 case WRITE_16:
2978 ei_lba = 0;
2979 lba = get_unaligned_be64(cmd + 2);
2980 num = get_unaligned_be32(cmd + 10);
2981 check_prot = true;
2982 break;
2983 case WRITE_10:
2984 ei_lba = 0;
2985 lba = get_unaligned_be32(cmd + 2);
2986 num = get_unaligned_be16(cmd + 7);
2987 check_prot = true;
2988 break;
2989 case WRITE_6:
2990 ei_lba = 0;
2991 lba = (u32)cmd[3] | (u32)cmd[2] << 8 |
2992 (u32)(cmd[1] & 0x1f) << 16;
2993 num = (0 == cmd[4]) ? 256 : cmd[4];
2994 check_prot = true;
2995 break;
2996 case WRITE_12:
2997 ei_lba = 0;
2998 lba = get_unaligned_be32(cmd + 2);
2999 num = get_unaligned_be32(cmd + 6);
3000 check_prot = true;
3001 break;
3002 case 0x53: /* XDWRITEREAD(10) */
3003 ei_lba = 0;
3004 lba = get_unaligned_be32(cmd + 2);
3005 num = get_unaligned_be16(cmd + 7);
3006 check_prot = false;
3007 break;
3008 default: /* assume WRITE(32) */
3009 lba = get_unaligned_be64(cmd + 12);
3010 ei_lba = get_unaligned_be32(cmd + 20);
3011 num = get_unaligned_be32(cmd + 28);
3012 check_prot = false;
3013 break;
3014 }
3015 if (unlikely(have_dif_prot && check_prot)) {
3016 if (sdebug_dif == T10_PI_TYPE2_PROTECTION &&
3017 (cmd[1] & 0xe0)) {
3018 mk_sense_invalid_opcode(scp);
3019 return check_condition_result;
3020 }
3021 if ((sdebug_dif == T10_PI_TYPE1_PROTECTION ||
3022 sdebug_dif == T10_PI_TYPE3_PROTECTION) &&
3023 (cmd[1] & 0xe0) == 0)
3024 sdev_printk(KERN_ERR, scp->device, "Unprotected WR "
3025 "to DIF device\n");
3026 }
3027 ret = check_device_access_params(scp, lba, num, true);
3028 if (ret)
3029 return ret;
3030 write_lock_irqsave(&atomic_rw, iflags);
3031
3032 /* DIX + T10 DIF */
3033 if (unlikely(sdebug_dix && scsi_prot_sg_count(scp))) {
3034 int prot_ret = prot_verify_write(scp, lba, num, ei_lba);
3035
3036 if (prot_ret) {
3037 write_unlock_irqrestore(&atomic_rw, iflags);
3038 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, prot_ret);
3039 return illegal_condition_result;
3040 }
3041 }
3042
3043 ret = do_device_access(scp, 0, lba, num, true);
3044 if (unlikely(scsi_debug_lbp()))
3045 map_region(lba, num);
3046 write_unlock_irqrestore(&atomic_rw, iflags);
3047 if (unlikely(-1 == ret))
3048 return DID_ERROR << 16;
3049 else if (unlikely(sdebug_verbose &&
3050 (ret < (num * sdebug_sector_size))))
3051 sdev_printk(KERN_INFO, scp->device,
3052 "%s: write: cdb indicated=%u, IO sent=%d bytes\n",
3053 my_name, num * sdebug_sector_size, ret);
3054
3055 if (unlikely(sdebug_any_injecting_opt)) {
3056 struct sdebug_queued_cmd *sqcp =
3057 (struct sdebug_queued_cmd *)scp->host_scribble;
3058
3059 if (sqcp) {
3060 if (sqcp->inj_recovered) {
3061 mk_sense_buffer(scp, RECOVERED_ERROR,
3062 THRESHOLD_EXCEEDED, 0);
3063 return check_condition_result;
3064 } else if (sqcp->inj_dif) {
3065 /* Logical block guard check failed */
3066 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 1);
3067 return illegal_condition_result;
3068 } else if (sqcp->inj_dix) {
3069 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 1);
3070 return illegal_condition_result;
3071 }
3072 }
3073 }
3074 return 0;
3075}
3076
3077/*
3078 * T10 has only specified WRITE SCATTERED(16) and WRITE SCATTERED(32).
3079 * No READ GATHERED yet (requires bidi or long cdb holding gather list).
3080 */
3081static int resp_write_scat(struct scsi_cmnd *scp,
3082 struct sdebug_dev_info *devip)
3083{
3084 u8 *cmd = scp->cmnd;
3085 u8 *lrdp = NULL;
3086 u8 *up;
3087 u8 wrprotect;
3088 u16 lbdof, num_lrd, k;
3089 u32 num, num_by, bt_len, lbdof_blen, sg_off, cum_lb;
3090 u32 lb_size = sdebug_sector_size;
3091 u32 ei_lba;
3092 u64 lba;
3093 unsigned long iflags;
3094 int ret, res;
3095 bool is_16;
3096 static const u32 lrd_size = 32; /* + parameter list header size */
3097
3098 if (cmd[0] == VARIABLE_LENGTH_CMD) {
3099 is_16 = false;
3100 wrprotect = (cmd[10] >> 5) & 0x7;
3101 lbdof = get_unaligned_be16(cmd + 12);
3102 num_lrd = get_unaligned_be16(cmd + 16);
3103 bt_len = get_unaligned_be32(cmd + 28);
3104 } else { /* that leaves WRITE SCATTERED(16) */
3105 is_16 = true;
3106 wrprotect = (cmd[2] >> 5) & 0x7;
3107 lbdof = get_unaligned_be16(cmd + 4);
3108 num_lrd = get_unaligned_be16(cmd + 8);
3109 bt_len = get_unaligned_be32(cmd + 10);
3110 if (unlikely(have_dif_prot)) {
3111 if (sdebug_dif == T10_PI_TYPE2_PROTECTION &&
3112 wrprotect) {
3113 mk_sense_invalid_opcode(scp);
3114 return illegal_condition_result;
3115 }
3116 if ((sdebug_dif == T10_PI_TYPE1_PROTECTION ||
3117 sdebug_dif == T10_PI_TYPE3_PROTECTION) &&
3118 wrprotect == 0)
3119 sdev_printk(KERN_ERR, scp->device,
3120 "Unprotected WR to DIF device\n");
3121 }
3122 }
3123 if ((num_lrd == 0) || (bt_len == 0))
3124 return 0; /* T10 says these do-nothings are not errors */
3125 if (lbdof == 0) {
3126 if (sdebug_verbose)
3127 sdev_printk(KERN_INFO, scp->device,
3128 "%s: %s: LB Data Offset field bad\n",
3129 my_name, __func__);
3130 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
3131 return illegal_condition_result;
3132 }
3133 lbdof_blen = lbdof * lb_size;
3134 if ((lrd_size + (num_lrd * lrd_size)) > lbdof_blen) {
3135 if (sdebug_verbose)
3136 sdev_printk(KERN_INFO, scp->device,
3137 "%s: %s: LBA range descriptors don't fit\n",
3138 my_name, __func__);
3139 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
3140 return illegal_condition_result;
3141 }
3142 lrdp = kzalloc(lbdof_blen, GFP_ATOMIC);
3143 if (lrdp == NULL)
3144 return SCSI_MLQUEUE_HOST_BUSY;
3145 if (sdebug_verbose)
3146 sdev_printk(KERN_INFO, scp->device,
3147 "%s: %s: Fetch header+scatter_list, lbdof_blen=%u\n",
3148 my_name, __func__, lbdof_blen);
3149 res = fetch_to_dev_buffer(scp, lrdp, lbdof_blen);
3150 if (res == -1) {
3151 ret = DID_ERROR << 16;
3152 goto err_out;
3153 }
3154
3155 write_lock_irqsave(&atomic_rw, iflags);
3156 sg_off = lbdof_blen;
3157 /* Spec says Buffer xfer Length field in number of LBs in dout */
3158 cum_lb = 0;
3159 for (k = 0, up = lrdp + lrd_size; k < num_lrd; ++k, up += lrd_size) {
3160 lba = get_unaligned_be64(up + 0);
3161 num = get_unaligned_be32(up + 8);
3162 if (sdebug_verbose)
3163 sdev_printk(KERN_INFO, scp->device,
3164 "%s: %s: k=%d LBA=0x%llx num=%u sg_off=%u\n",
3165 my_name, __func__, k, lba, num, sg_off);
3166 if (num == 0)
3167 continue;
3168 ret = check_device_access_params(scp, lba, num, true);
3169 if (ret)
3170 goto err_out_unlock;
3171 num_by = num * lb_size;
3172 ei_lba = is_16 ? 0 : get_unaligned_be32(up + 12);
3173
3174 if ((cum_lb + num) > bt_len) {
3175 if (sdebug_verbose)
3176 sdev_printk(KERN_INFO, scp->device,
3177 "%s: %s: sum of blocks > data provided\n",
3178 my_name, __func__);
3179 mk_sense_buffer(scp, ILLEGAL_REQUEST, WRITE_ERROR_ASC,
3180 0);
3181 ret = illegal_condition_result;
3182 goto err_out_unlock;
3183 }
3184
3185 /* DIX + T10 DIF */
3186 if (unlikely(sdebug_dix && scsi_prot_sg_count(scp))) {
3187 int prot_ret = prot_verify_write(scp, lba, num,
3188 ei_lba);
3189
3190 if (prot_ret) {
3191 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10,
3192 prot_ret);
3193 ret = illegal_condition_result;
3194 goto err_out_unlock;
3195 }
3196 }
3197
3198 ret = do_device_access(scp, sg_off, lba, num, true);
3199 if (unlikely(scsi_debug_lbp()))
3200 map_region(lba, num);
3201 if (unlikely(-1 == ret)) {
3202 ret = DID_ERROR << 16;
3203 goto err_out_unlock;
3204 } else if (unlikely(sdebug_verbose && (ret < num_by)))
3205 sdev_printk(KERN_INFO, scp->device,
3206 "%s: write: cdb indicated=%u, IO sent=%d bytes\n",
3207 my_name, num_by, ret);
3208
3209 if (unlikely(sdebug_any_injecting_opt)) {
3210 struct sdebug_queued_cmd *sqcp =
3211 (struct sdebug_queued_cmd *)scp->host_scribble;
3212
3213 if (sqcp) {
3214 if (sqcp->inj_recovered) {
3215 mk_sense_buffer(scp, RECOVERED_ERROR,
3216 THRESHOLD_EXCEEDED, 0);
3217 ret = illegal_condition_result;
3218 goto err_out_unlock;
3219 } else if (sqcp->inj_dif) {
3220 /* Logical block guard check failed */
3221 mk_sense_buffer(scp, ABORTED_COMMAND,
3222 0x10, 1);
3223 ret = illegal_condition_result;
3224 goto err_out_unlock;
3225 } else if (sqcp->inj_dix) {
3226 mk_sense_buffer(scp, ILLEGAL_REQUEST,
3227 0x10, 1);
3228 ret = illegal_condition_result;
3229 goto err_out_unlock;
3230 }
3231 }
3232 }
3233 sg_off += num_by;
3234 cum_lb += num;
3235 }
3236 ret = 0;
3237err_out_unlock:
3238 write_unlock_irqrestore(&atomic_rw, iflags);
3239err_out:
3240 kfree(lrdp);
3241 return ret;
3242}
3243
3244static int resp_write_same(struct scsi_cmnd *scp, u64 lba, u32 num,
3245 u32 ei_lba, bool unmap, bool ndob)
3246{
3247 int ret;
3248 unsigned long iflags;
3249 unsigned long long i;
3250 u32 lb_size = sdebug_sector_size;
3251 u64 block, lbaa;
3252 u8 *fs1p;
3253
3254 ret = check_device_access_params(scp, lba, num, true);
3255 if (ret)
3256 return ret;
3257
3258 write_lock_irqsave(&atomic_rw, iflags);
3259
3260 if (unmap && scsi_debug_lbp()) {
3261 unmap_region(lba, num);
3262 goto out;
3263 }
3264 lbaa = lba;
3265 block = do_div(lbaa, sdebug_store_sectors);
3266 /* if ndob then zero 1 logical block, else fetch 1 logical block */
3267 fs1p = fake_storep + (block * lb_size);
3268 if (ndob) {
3269 memset(fs1p, 0, lb_size);
3270 ret = 0;
3271 } else
3272 ret = fetch_to_dev_buffer(scp, fs1p, lb_size);
3273
3274 if (-1 == ret) {
3275 write_unlock_irqrestore(&atomic_rw, iflags);
3276 return DID_ERROR << 16;
3277 } else if (sdebug_verbose && !ndob && (ret < lb_size))
3278 sdev_printk(KERN_INFO, scp->device,
3279 "%s: %s: lb size=%u, IO sent=%d bytes\n",
3280 my_name, "write same", lb_size, ret);
3281
3282 /* Copy first sector to remaining blocks */
3283 for (i = 1 ; i < num ; i++) {
3284 lbaa = lba + i;
3285 block = do_div(lbaa, sdebug_store_sectors);
3286 memmove(fake_storep + (block * lb_size), fs1p, lb_size);
3287 }
3288 if (scsi_debug_lbp())
3289 map_region(lba, num);
3290out:
3291 write_unlock_irqrestore(&atomic_rw, iflags);
3292
3293 return 0;
3294}
3295
3296static int resp_write_same_10(struct scsi_cmnd *scp,
3297 struct sdebug_dev_info *devip)
3298{
3299 u8 *cmd = scp->cmnd;
3300 u32 lba;
3301 u16 num;
3302 u32 ei_lba = 0;
3303 bool unmap = false;
3304
3305 if (cmd[1] & 0x8) {
3306 if (sdebug_lbpws10 == 0) {
3307 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 3);
3308 return check_condition_result;
3309 } else
3310 unmap = true;
3311 }
3312 lba = get_unaligned_be32(cmd + 2);
3313 num = get_unaligned_be16(cmd + 7);
3314 if (num > sdebug_write_same_length) {
3315 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 7, -1);
3316 return check_condition_result;
3317 }
3318 return resp_write_same(scp, lba, num, ei_lba, unmap, false);
3319}
3320
3321static int resp_write_same_16(struct scsi_cmnd *scp,
3322 struct sdebug_dev_info *devip)
3323{
3324 u8 *cmd = scp->cmnd;
3325 u64 lba;
3326 u32 num;
3327 u32 ei_lba = 0;
3328 bool unmap = false;
3329 bool ndob = false;
3330
3331 if (cmd[1] & 0x8) { /* UNMAP */
3332 if (sdebug_lbpws == 0) {
3333 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 3);
3334 return check_condition_result;
3335 } else
3336 unmap = true;
3337 }
3338 if (cmd[1] & 0x1) /* NDOB (no data-out buffer, assumes zeroes) */
3339 ndob = true;
3340 lba = get_unaligned_be64(cmd + 2);
3341 num = get_unaligned_be32(cmd + 10);
3342 if (num > sdebug_write_same_length) {
3343 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 10, -1);
3344 return check_condition_result;
3345 }
3346 return resp_write_same(scp, lba, num, ei_lba, unmap, ndob);
3347}
3348
3349/* Note the mode field is in the same position as the (lower) service action
3350 * field. For the Report supported operation codes command, SPC-4 suggests
3351 * each mode of this command should be reported separately; for future. */
3352static int resp_write_buffer(struct scsi_cmnd *scp,
3353 struct sdebug_dev_info *devip)
3354{
3355 u8 *cmd = scp->cmnd;
3356 struct scsi_device *sdp = scp->device;
3357 struct sdebug_dev_info *dp;
3358 u8 mode;
3359
3360 mode = cmd[1] & 0x1f;
3361 switch (mode) {
3362 case 0x4: /* download microcode (MC) and activate (ACT) */
3363 /* set UAs on this device only */
3364 set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm);
3365 set_bit(SDEBUG_UA_MICROCODE_CHANGED, devip->uas_bm);
3366 break;
3367 case 0x5: /* download MC, save and ACT */
3368 set_bit(SDEBUG_UA_MICROCODE_CHANGED_WO_RESET, devip->uas_bm);
3369 break;
3370 case 0x6: /* download MC with offsets and ACT */
3371 /* set UAs on most devices (LUs) in this target */
3372 list_for_each_entry(dp,
3373 &devip->sdbg_host->dev_info_list,
3374 dev_list)
3375 if (dp->target == sdp->id) {
3376 set_bit(SDEBUG_UA_BUS_RESET, dp->uas_bm);
3377 if (devip != dp)
3378 set_bit(SDEBUG_UA_MICROCODE_CHANGED,
3379 dp->uas_bm);
3380 }
3381 break;
3382 case 0x7: /* download MC with offsets, save, and ACT */
3383 /* set UA on all devices (LUs) in this target */
3384 list_for_each_entry(dp,
3385 &devip->sdbg_host->dev_info_list,
3386 dev_list)
3387 if (dp->target == sdp->id)
3388 set_bit(SDEBUG_UA_MICROCODE_CHANGED_WO_RESET,
3389 dp->uas_bm);
3390 break;
3391 default:
3392 /* do nothing for this command for other mode values */
3393 break;
3394 }
3395 return 0;
3396}
3397
3398static int resp_comp_write(struct scsi_cmnd *scp,
3399 struct sdebug_dev_info *devip)
3400{
3401 u8 *cmd = scp->cmnd;
3402 u8 *arr;
3403 u8 *fake_storep_hold;
3404 u64 lba;
3405 u32 dnum;
3406 u32 lb_size = sdebug_sector_size;
3407 u8 num;
3408 unsigned long iflags;
3409 int ret;
3410 int retval = 0;
3411
3412 lba = get_unaligned_be64(cmd + 2);
3413 num = cmd[13]; /* 1 to a maximum of 255 logical blocks */
3414 if (0 == num)
3415 return 0; /* degenerate case, not an error */
3416 if (sdebug_dif == T10_PI_TYPE2_PROTECTION &&
3417 (cmd[1] & 0xe0)) {
3418 mk_sense_invalid_opcode(scp);
3419 return check_condition_result;
3420 }
3421 if ((sdebug_dif == T10_PI_TYPE1_PROTECTION ||
3422 sdebug_dif == T10_PI_TYPE3_PROTECTION) &&
3423 (cmd[1] & 0xe0) == 0)
3424 sdev_printk(KERN_ERR, scp->device, "Unprotected WR "
3425 "to DIF device\n");
3426 ret = check_device_access_params(scp, lba, num, false);
3427 if (ret)
3428 return ret;
3429 dnum = 2 * num;
3430 arr = kcalloc(lb_size, dnum, GFP_ATOMIC);
3431 if (NULL == arr) {
3432 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
3433 INSUFF_RES_ASCQ);
3434 return check_condition_result;
3435 }
3436
3437 write_lock_irqsave(&atomic_rw, iflags);
3438
3439 /* trick do_device_access() to fetch both compare and write buffers
3440 * from data-in into arr. Safe (atomic) since write_lock held. */
3441 fake_storep_hold = fake_storep;
3442 fake_storep = arr;
3443 ret = do_device_access(scp, 0, 0, dnum, true);
3444 fake_storep = fake_storep_hold;
3445 if (ret == -1) {
3446 retval = DID_ERROR << 16;
3447 goto cleanup;
3448 } else if (sdebug_verbose && (ret < (dnum * lb_size)))
3449 sdev_printk(KERN_INFO, scp->device, "%s: compare_write: cdb "
3450 "indicated=%u, IO sent=%d bytes\n", my_name,
3451 dnum * lb_size, ret);
3452 if (!comp_write_worker(lba, num, arr)) {
3453 mk_sense_buffer(scp, MISCOMPARE, MISCOMPARE_VERIFY_ASC, 0);
3454 retval = check_condition_result;
3455 goto cleanup;
3456 }
3457 if (scsi_debug_lbp())
3458 map_region(lba, num);
3459cleanup:
3460 write_unlock_irqrestore(&atomic_rw, iflags);
3461 kfree(arr);
3462 return retval;
3463}
3464
3465struct unmap_block_desc {
3466 __be64 lba;
3467 __be32 blocks;
3468 __be32 __reserved;
3469};
3470
3471static int resp_unmap(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
3472{
3473 unsigned char *buf;
3474 struct unmap_block_desc *desc;
3475 unsigned int i, payload_len, descriptors;
3476 int ret;
3477 unsigned long iflags;
3478
3479
3480 if (!scsi_debug_lbp())
3481 return 0; /* fib and say its done */
3482 payload_len = get_unaligned_be16(scp->cmnd + 7);
3483 BUG_ON(scsi_bufflen(scp) != payload_len);
3484
3485 descriptors = (payload_len - 8) / 16;
3486 if (descriptors > sdebug_unmap_max_desc) {
3487 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 7, -1);
3488 return check_condition_result;
3489 }
3490
3491 buf = kzalloc(scsi_bufflen(scp), GFP_ATOMIC);
3492 if (!buf) {
3493 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
3494 INSUFF_RES_ASCQ);
3495 return check_condition_result;
3496 }
3497
3498 scsi_sg_copy_to_buffer(scp, buf, scsi_bufflen(scp));
3499
3500 BUG_ON(get_unaligned_be16(&buf[0]) != payload_len - 2);
3501 BUG_ON(get_unaligned_be16(&buf[2]) != descriptors * 16);
3502
3503 desc = (void *)&buf[8];
3504
3505 write_lock_irqsave(&atomic_rw, iflags);
3506
3507 for (i = 0 ; i < descriptors ; i++) {
3508 unsigned long long lba = get_unaligned_be64(&desc[i].lba);
3509 unsigned int num = get_unaligned_be32(&desc[i].blocks);
3510
3511 ret = check_device_access_params(scp, lba, num, true);
3512 if (ret)
3513 goto out;
3514
3515 unmap_region(lba, num);
3516 }
3517
3518 ret = 0;
3519
3520out:
3521 write_unlock_irqrestore(&atomic_rw, iflags);
3522 kfree(buf);
3523
3524 return ret;
3525}
3526
3527#define SDEBUG_GET_LBA_STATUS_LEN 32
3528
3529static int resp_get_lba_status(struct scsi_cmnd *scp,
3530 struct sdebug_dev_info *devip)
3531{
3532 u8 *cmd = scp->cmnd;
3533 u64 lba;
3534 u32 alloc_len, mapped, num;
3535 u8 arr[SDEBUG_GET_LBA_STATUS_LEN];
3536 int ret;
3537
3538 lba = get_unaligned_be64(cmd + 2);
3539 alloc_len = get_unaligned_be32(cmd + 10);
3540
3541 if (alloc_len < 24)
3542 return 0;
3543
3544 ret = check_device_access_params(scp, lba, 1, false);
3545 if (ret)
3546 return ret;
3547
3548 if (scsi_debug_lbp())
3549 mapped = map_state(lba, &num);
3550 else {
3551 mapped = 1;
3552 /* following just in case virtual_gb changed */
3553 sdebug_capacity = get_sdebug_capacity();
3554 if (sdebug_capacity - lba <= 0xffffffff)
3555 num = sdebug_capacity - lba;
3556 else
3557 num = 0xffffffff;
3558 }
3559
3560 memset(arr, 0, SDEBUG_GET_LBA_STATUS_LEN);
3561 put_unaligned_be32(20, arr); /* Parameter Data Length */
3562 put_unaligned_be64(lba, arr + 8); /* LBA */
3563 put_unaligned_be32(num, arr + 16); /* Number of blocks */
3564 arr[20] = !mapped; /* prov_stat=0: mapped; 1: dealloc */
3565
3566 return fill_from_dev_buffer(scp, arr, SDEBUG_GET_LBA_STATUS_LEN);
3567}
3568
3569static int resp_sync_cache(struct scsi_cmnd *scp,
3570 struct sdebug_dev_info *devip)
3571{
3572 int res = 0;
3573 u64 lba;
3574 u32 num_blocks;
3575 u8 *cmd = scp->cmnd;
3576
3577 if (cmd[0] == SYNCHRONIZE_CACHE) { /* 10 byte cdb */
3578 lba = get_unaligned_be32(cmd + 2);
3579 num_blocks = get_unaligned_be16(cmd + 7);
3580 } else { /* SYNCHRONIZE_CACHE(16) */
3581 lba = get_unaligned_be64(cmd + 2);
3582 num_blocks = get_unaligned_be32(cmd + 10);
3583 }
3584 if (lba + num_blocks > sdebug_capacity) {
3585 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
3586 return check_condition_result;
3587 }
3588 if (!write_since_sync || cmd[1] & 0x2)
3589 res = SDEG_RES_IMMED_MASK;
3590 else /* delay if write_since_sync and IMMED clear */
3591 write_since_sync = false;
3592 return res;
3593}
3594
3595#define RL_BUCKET_ELEMS 8
3596
3597/* Even though each pseudo target has a REPORT LUNS "well known logical unit"
3598 * (W-LUN), the normal Linux scanning logic does not associate it with a
3599 * device (e.g. /dev/sg7). The following magic will make that association:
3600 * "cd /sys/class/scsi_host/host<n> ; echo '- - 49409' > scan"
3601 * where <n> is a host number. If there are multiple targets in a host then
3602 * the above will associate a W-LUN to each target. To only get a W-LUN
3603 * for target 2, then use "echo '- 2 49409' > scan" .
3604 */
3605static int resp_report_luns(struct scsi_cmnd *scp,
3606 struct sdebug_dev_info *devip)
3607{
3608 unsigned char *cmd = scp->cmnd;
3609 unsigned int alloc_len;
3610 unsigned char select_report;
3611 u64 lun;
3612 struct scsi_lun *lun_p;
3613 u8 arr[RL_BUCKET_ELEMS * sizeof(struct scsi_lun)];
3614 unsigned int lun_cnt; /* normal LUN count (max: 256) */
3615 unsigned int wlun_cnt; /* report luns W-LUN count */
3616 unsigned int tlun_cnt; /* total LUN count */
3617 unsigned int rlen; /* response length (in bytes) */
3618 int k, j, n, res;
3619 unsigned int off_rsp = 0;
3620 const int sz_lun = sizeof(struct scsi_lun);
3621
3622 clear_luns_changed_on_target(devip);
3623
3624 select_report = cmd[2];
3625 alloc_len = get_unaligned_be32(cmd + 6);
3626
3627 if (alloc_len < 4) {
3628 pr_err("alloc len too small %d\n", alloc_len);
3629 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 6, -1);
3630 return check_condition_result;
3631 }
3632
3633 switch (select_report) {
3634 case 0: /* all LUNs apart from W-LUNs */
3635 lun_cnt = sdebug_max_luns;
3636 wlun_cnt = 0;
3637 break;
3638 case 1: /* only W-LUNs */
3639 lun_cnt = 0;
3640 wlun_cnt = 1;
3641 break;
3642 case 2: /* all LUNs */
3643 lun_cnt = sdebug_max_luns;
3644 wlun_cnt = 1;
3645 break;
3646 case 0x10: /* only administrative LUs */
3647 case 0x11: /* see SPC-5 */
3648 case 0x12: /* only subsiduary LUs owned by referenced LU */
3649 default:
3650 pr_debug("select report invalid %d\n", select_report);
3651 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, -1);
3652 return check_condition_result;
3653 }
3654
3655 if (sdebug_no_lun_0 && (lun_cnt > 0))
3656 --lun_cnt;
3657
3658 tlun_cnt = lun_cnt + wlun_cnt;
3659 rlen = tlun_cnt * sz_lun; /* excluding 8 byte header */
3660 scsi_set_resid(scp, scsi_bufflen(scp));
3661 pr_debug("select_report %d luns = %d wluns = %d no_lun0 %d\n",
3662 select_report, lun_cnt, wlun_cnt, sdebug_no_lun_0);
3663
3664 /* loops rely on sizeof response header same as sizeof lun (both 8) */
3665 lun = sdebug_no_lun_0 ? 1 : 0;
3666 for (k = 0, j = 0, res = 0; true; ++k, j = 0) {
3667 memset(arr, 0, sizeof(arr));
3668 lun_p = (struct scsi_lun *)&arr[0];
3669 if (k == 0) {
3670 put_unaligned_be32(rlen, &arr[0]);
3671 ++lun_p;
3672 j = 1;
3673 }
3674 for ( ; j < RL_BUCKET_ELEMS; ++j, ++lun_p) {
3675 if ((k * RL_BUCKET_ELEMS) + j > lun_cnt)
3676 break;
3677 int_to_scsilun(lun++, lun_p);
3678 }
3679 if (j < RL_BUCKET_ELEMS)
3680 break;
3681 n = j * sz_lun;
3682 res = p_fill_from_dev_buffer(scp, arr, n, off_rsp);
3683 if (res)
3684 return res;
3685 off_rsp += n;
3686 }
3687 if (wlun_cnt) {
3688 int_to_scsilun(SCSI_W_LUN_REPORT_LUNS, lun_p);
3689 ++j;
3690 }
3691 if (j > 0)
3692 res = p_fill_from_dev_buffer(scp, arr, j * sz_lun, off_rsp);
3693 return res;
3694}
3695
3696static struct sdebug_queue *get_queue(struct scsi_cmnd *cmnd)
3697{
3698 u32 tag = blk_mq_unique_tag(cmnd->request);
3699 u16 hwq = blk_mq_unique_tag_to_hwq(tag);
3700
3701 pr_debug("tag=%#x, hwq=%d\n", tag, hwq);
3702 if (WARN_ON_ONCE(hwq >= submit_queues))
3703 hwq = 0;
3704 return sdebug_q_arr + hwq;
3705}
3706
3707/* Queued (deferred) command completions converge here. */
3708static void sdebug_q_cmd_complete(struct sdebug_defer *sd_dp)
3709{
3710 bool aborted = sd_dp->aborted;
3711 int qc_idx;
3712 int retiring = 0;
3713 unsigned long iflags;
3714 struct sdebug_queue *sqp;
3715 struct sdebug_queued_cmd *sqcp;
3716 struct scsi_cmnd *scp;
3717 struct sdebug_dev_info *devip;
3718
3719 sd_dp->defer_t = SDEB_DEFER_NONE;
3720 if (unlikely(aborted))
3721 sd_dp->aborted = false;
3722 qc_idx = sd_dp->qc_idx;
3723 sqp = sdebug_q_arr + sd_dp->sqa_idx;
3724 if (sdebug_statistics) {
3725 atomic_inc(&sdebug_completions);
3726 if (raw_smp_processor_id() != sd_dp->issuing_cpu)
3727 atomic_inc(&sdebug_miss_cpus);
3728 }
3729 if (unlikely((qc_idx < 0) || (qc_idx >= SDEBUG_CANQUEUE))) {
3730 pr_err("wild qc_idx=%d\n", qc_idx);
3731 return;
3732 }
3733 spin_lock_irqsave(&sqp->qc_lock, iflags);
3734 sqcp = &sqp->qc_arr[qc_idx];
3735 scp = sqcp->a_cmnd;
3736 if (unlikely(scp == NULL)) {
3737 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
3738 pr_err("scp is NULL, sqa_idx=%d, qc_idx=%d\n",
3739 sd_dp->sqa_idx, qc_idx);
3740 return;
3741 }
3742 devip = (struct sdebug_dev_info *)scp->device->hostdata;
3743 if (likely(devip))
3744 atomic_dec(&devip->num_in_q);
3745 else
3746 pr_err("devip=NULL\n");
3747 if (unlikely(atomic_read(&retired_max_queue) > 0))
3748 retiring = 1;
3749
3750 sqcp->a_cmnd = NULL;
3751 if (unlikely(!test_and_clear_bit(qc_idx, sqp->in_use_bm))) {
3752 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
3753 pr_err("Unexpected completion\n");
3754 return;
3755 }
3756
3757 if (unlikely(retiring)) { /* user has reduced max_queue */
3758 int k, retval;
3759
3760 retval = atomic_read(&retired_max_queue);
3761 if (qc_idx >= retval) {
3762 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
3763 pr_err("index %d too large\n", retval);
3764 return;
3765 }
3766 k = find_last_bit(sqp->in_use_bm, retval);
3767 if ((k < sdebug_max_queue) || (k == retval))
3768 atomic_set(&retired_max_queue, 0);
3769 else
3770 atomic_set(&retired_max_queue, k + 1);
3771 }
3772 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
3773 if (unlikely(aborted)) {
3774 if (sdebug_verbose)
3775 pr_info("bypassing scsi_done() due to aborted cmd\n");
3776 return;
3777 }
3778 scp->scsi_done(scp); /* callback to mid level */
3779}
3780
3781/* When high resolution timer goes off this function is called. */
3782static enum hrtimer_restart sdebug_q_cmd_hrt_complete(struct hrtimer *timer)
3783{
3784 struct sdebug_defer *sd_dp = container_of(timer, struct sdebug_defer,
3785 hrt);
3786 sdebug_q_cmd_complete(sd_dp);
3787 return HRTIMER_NORESTART;
3788}
3789
3790/* When work queue schedules work, it calls this function. */
3791static void sdebug_q_cmd_wq_complete(struct work_struct *work)
3792{
3793 struct sdebug_defer *sd_dp = container_of(work, struct sdebug_defer,
3794 ew.work);
3795 sdebug_q_cmd_complete(sd_dp);
3796}
3797
3798static bool got_shared_uuid;
3799static uuid_t shared_uuid;
3800
3801static struct sdebug_dev_info *sdebug_device_create(
3802 struct sdebug_host_info *sdbg_host, gfp_t flags)
3803{
3804 struct sdebug_dev_info *devip;
3805
3806 devip = kzalloc(sizeof(*devip), flags);
3807 if (devip) {
3808 if (sdebug_uuid_ctl == 1)
3809 uuid_gen(&devip->lu_name);
3810 else if (sdebug_uuid_ctl == 2) {
3811 if (got_shared_uuid)
3812 devip->lu_name = shared_uuid;
3813 else {
3814 uuid_gen(&shared_uuid);
3815 got_shared_uuid = true;
3816 devip->lu_name = shared_uuid;
3817 }
3818 }
3819 devip->sdbg_host = sdbg_host;
3820 list_add_tail(&devip->dev_list, &sdbg_host->dev_info_list);
3821 }
3822 return devip;
3823}
3824
3825static struct sdebug_dev_info *find_build_dev_info(struct scsi_device *sdev)
3826{
3827 struct sdebug_host_info *sdbg_host;
3828 struct sdebug_dev_info *open_devip = NULL;
3829 struct sdebug_dev_info *devip;
3830
3831 sdbg_host = *(struct sdebug_host_info **)shost_priv(sdev->host);
3832 if (!sdbg_host) {
3833 pr_err("Host info NULL\n");
3834 return NULL;
3835 }
3836 list_for_each_entry(devip, &sdbg_host->dev_info_list, dev_list) {
3837 if ((devip->used) && (devip->channel == sdev->channel) &&
3838 (devip->target == sdev->id) &&
3839 (devip->lun == sdev->lun))
3840 return devip;
3841 else {
3842 if ((!devip->used) && (!open_devip))
3843 open_devip = devip;
3844 }
3845 }
3846 if (!open_devip) { /* try and make a new one */
3847 open_devip = sdebug_device_create(sdbg_host, GFP_ATOMIC);
3848 if (!open_devip) {
3849 pr_err("out of memory at line %d\n", __LINE__);
3850 return NULL;
3851 }
3852 }
3853
3854 open_devip->channel = sdev->channel;
3855 open_devip->target = sdev->id;
3856 open_devip->lun = sdev->lun;
3857 open_devip->sdbg_host = sdbg_host;
3858 atomic_set(&open_devip->num_in_q, 0);
3859 set_bit(SDEBUG_UA_POR, open_devip->uas_bm);
3860 open_devip->used = true;
3861 return open_devip;
3862}
3863
3864static int scsi_debug_slave_alloc(struct scsi_device *sdp)
3865{
3866 if (sdebug_verbose)
3867 pr_info("slave_alloc <%u %u %u %llu>\n",
3868 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
3869 return 0;
3870}
3871
3872static int scsi_debug_slave_configure(struct scsi_device *sdp)
3873{
3874 struct sdebug_dev_info *devip =
3875 (struct sdebug_dev_info *)sdp->hostdata;
3876
3877 if (sdebug_verbose)
3878 pr_info("slave_configure <%u %u %u %llu>\n",
3879 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
3880 if (sdp->host->max_cmd_len != SDEBUG_MAX_CMD_LEN)
3881 sdp->host->max_cmd_len = SDEBUG_MAX_CMD_LEN;
3882 if (devip == NULL) {
3883 devip = find_build_dev_info(sdp);
3884 if (devip == NULL)
3885 return 1; /* no resources, will be marked offline */
3886 }
3887 sdp->hostdata = devip;
3888 if (sdebug_no_uld)
3889 sdp->no_uld_attach = 1;
3890 config_cdb_len(sdp);
3891 return 0;
3892}
3893
3894static void scsi_debug_slave_destroy(struct scsi_device *sdp)
3895{
3896 struct sdebug_dev_info *devip =
3897 (struct sdebug_dev_info *)sdp->hostdata;
3898
3899 if (sdebug_verbose)
3900 pr_info("slave_destroy <%u %u %u %llu>\n",
3901 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
3902 if (devip) {
3903 /* make this slot available for re-use */
3904 devip->used = false;
3905 sdp->hostdata = NULL;
3906 }
3907}
3908
3909static void stop_qc_helper(struct sdebug_defer *sd_dp,
3910 enum sdeb_defer_type defer_t)
3911{
3912 if (!sd_dp)
3913 return;
3914 if (defer_t == SDEB_DEFER_HRT)
3915 hrtimer_cancel(&sd_dp->hrt);
3916 else if (defer_t == SDEB_DEFER_WQ)
3917 cancel_work_sync(&sd_dp->ew.work);
3918}
3919
3920/* If @cmnd found deletes its timer or work queue and returns true; else
3921 returns false */
3922static bool stop_queued_cmnd(struct scsi_cmnd *cmnd)
3923{
3924 unsigned long iflags;
3925 int j, k, qmax, r_qmax;
3926 enum sdeb_defer_type l_defer_t;
3927 struct sdebug_queue *sqp;
3928 struct sdebug_queued_cmd *sqcp;
3929 struct sdebug_dev_info *devip;
3930 struct sdebug_defer *sd_dp;
3931
3932 for (j = 0, sqp = sdebug_q_arr; j < submit_queues; ++j, ++sqp) {
3933 spin_lock_irqsave(&sqp->qc_lock, iflags);
3934 qmax = sdebug_max_queue;
3935 r_qmax = atomic_read(&retired_max_queue);
3936 if (r_qmax > qmax)
3937 qmax = r_qmax;
3938 for (k = 0; k < qmax; ++k) {
3939 if (test_bit(k, sqp->in_use_bm)) {
3940 sqcp = &sqp->qc_arr[k];
3941 if (cmnd != sqcp->a_cmnd)
3942 continue;
3943 /* found */
3944 devip = (struct sdebug_dev_info *)
3945 cmnd->device->hostdata;
3946 if (devip)
3947 atomic_dec(&devip->num_in_q);
3948 sqcp->a_cmnd = NULL;
3949 sd_dp = sqcp->sd_dp;
3950 if (sd_dp) {
3951 l_defer_t = sd_dp->defer_t;
3952 sd_dp->defer_t = SDEB_DEFER_NONE;
3953 } else
3954 l_defer_t = SDEB_DEFER_NONE;
3955 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
3956 stop_qc_helper(sd_dp, l_defer_t);
3957 clear_bit(k, sqp->in_use_bm);
3958 return true;
3959 }
3960 }
3961 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
3962 }
3963 return false;
3964}
3965
3966/* Deletes (stops) timers or work queues of all queued commands */
3967static void stop_all_queued(void)
3968{
3969 unsigned long iflags;
3970 int j, k;
3971 enum sdeb_defer_type l_defer_t;
3972 struct sdebug_queue *sqp;
3973 struct sdebug_queued_cmd *sqcp;
3974 struct sdebug_dev_info *devip;
3975 struct sdebug_defer *sd_dp;
3976
3977 for (j = 0, sqp = sdebug_q_arr; j < submit_queues; ++j, ++sqp) {
3978 spin_lock_irqsave(&sqp->qc_lock, iflags);
3979 for (k = 0; k < SDEBUG_CANQUEUE; ++k) {
3980 if (test_bit(k, sqp->in_use_bm)) {
3981 sqcp = &sqp->qc_arr[k];
3982 if (sqcp->a_cmnd == NULL)
3983 continue;
3984 devip = (struct sdebug_dev_info *)
3985 sqcp->a_cmnd->device->hostdata;
3986 if (devip)
3987 atomic_dec(&devip->num_in_q);
3988 sqcp->a_cmnd = NULL;
3989 sd_dp = sqcp->sd_dp;
3990 if (sd_dp) {
3991 l_defer_t = sd_dp->defer_t;
3992 sd_dp->defer_t = SDEB_DEFER_NONE;
3993 } else
3994 l_defer_t = SDEB_DEFER_NONE;
3995 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
3996 stop_qc_helper(sd_dp, l_defer_t);
3997 clear_bit(k, sqp->in_use_bm);
3998 spin_lock_irqsave(&sqp->qc_lock, iflags);
3999 }
4000 }
4001 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
4002 }
4003}
4004
4005/* Free queued command memory on heap */
4006static void free_all_queued(void)
4007{
4008 int j, k;
4009 struct sdebug_queue *sqp;
4010 struct sdebug_queued_cmd *sqcp;
4011
4012 for (j = 0, sqp = sdebug_q_arr; j < submit_queues; ++j, ++sqp) {
4013 for (k = 0; k < SDEBUG_CANQUEUE; ++k) {
4014 sqcp = &sqp->qc_arr[k];
4015 kfree(sqcp->sd_dp);
4016 sqcp->sd_dp = NULL;
4017 }
4018 }
4019}
4020
4021static int scsi_debug_abort(struct scsi_cmnd *SCpnt)
4022{
4023 bool ok;
4024
4025 ++num_aborts;
4026 if (SCpnt) {
4027 ok = stop_queued_cmnd(SCpnt);
4028 if (SCpnt->device && (SDEBUG_OPT_ALL_NOISE & sdebug_opts))
4029 sdev_printk(KERN_INFO, SCpnt->device,
4030 "%s: command%s found\n", __func__,
4031 ok ? "" : " not");
4032 }
4033 return SUCCESS;
4034}
4035
4036static int scsi_debug_device_reset(struct scsi_cmnd *SCpnt)
4037{
4038 ++num_dev_resets;
4039 if (SCpnt && SCpnt->device) {
4040 struct scsi_device *sdp = SCpnt->device;
4041 struct sdebug_dev_info *devip =
4042 (struct sdebug_dev_info *)sdp->hostdata;
4043
4044 if (SDEBUG_OPT_ALL_NOISE & sdebug_opts)
4045 sdev_printk(KERN_INFO, sdp, "%s\n", __func__);
4046 if (devip)
4047 set_bit(SDEBUG_UA_POR, devip->uas_bm);
4048 }
4049 return SUCCESS;
4050}
4051
4052static int scsi_debug_target_reset(struct scsi_cmnd *SCpnt)
4053{
4054 struct sdebug_host_info *sdbg_host;
4055 struct sdebug_dev_info *devip;
4056 struct scsi_device *sdp;
4057 struct Scsi_Host *hp;
4058 int k = 0;
4059
4060 ++num_target_resets;
4061 if (!SCpnt)
4062 goto lie;
4063 sdp = SCpnt->device;
4064 if (!sdp)
4065 goto lie;
4066 if (SDEBUG_OPT_ALL_NOISE & sdebug_opts)
4067 sdev_printk(KERN_INFO, sdp, "%s\n", __func__);
4068 hp = sdp->host;
4069 if (!hp)
4070 goto lie;
4071 sdbg_host = *(struct sdebug_host_info **)shost_priv(hp);
4072 if (sdbg_host) {
4073 list_for_each_entry(devip,
4074 &sdbg_host->dev_info_list,
4075 dev_list)
4076 if (devip->target == sdp->id) {
4077 set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm);
4078 ++k;
4079 }
4080 }
4081 if (SDEBUG_OPT_RESET_NOISE & sdebug_opts)
4082 sdev_printk(KERN_INFO, sdp,
4083 "%s: %d device(s) found in target\n", __func__, k);
4084lie:
4085 return SUCCESS;
4086}
4087
4088static int scsi_debug_bus_reset(struct scsi_cmnd *SCpnt)
4089{
4090 struct sdebug_host_info *sdbg_host;
4091 struct sdebug_dev_info *devip;
4092 struct scsi_device *sdp;
4093 struct Scsi_Host *hp;
4094 int k = 0;
4095
4096 ++num_bus_resets;
4097 if (!(SCpnt && SCpnt->device))
4098 goto lie;
4099 sdp = SCpnt->device;
4100 if (SDEBUG_OPT_ALL_NOISE & sdebug_opts)
4101 sdev_printk(KERN_INFO, sdp, "%s\n", __func__);
4102 hp = sdp->host;
4103 if (hp) {
4104 sdbg_host = *(struct sdebug_host_info **)shost_priv(hp);
4105 if (sdbg_host) {
4106 list_for_each_entry(devip,
4107 &sdbg_host->dev_info_list,
4108 dev_list) {
4109 set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm);
4110 ++k;
4111 }
4112 }
4113 }
4114 if (SDEBUG_OPT_RESET_NOISE & sdebug_opts)
4115 sdev_printk(KERN_INFO, sdp,
4116 "%s: %d device(s) found in host\n", __func__, k);
4117lie:
4118 return SUCCESS;
4119}
4120
4121static int scsi_debug_host_reset(struct scsi_cmnd *SCpnt)
4122{
4123 struct sdebug_host_info *sdbg_host;
4124 struct sdebug_dev_info *devip;
4125 int k = 0;
4126
4127 ++num_host_resets;
4128 if ((SCpnt->device) && (SDEBUG_OPT_ALL_NOISE & sdebug_opts))
4129 sdev_printk(KERN_INFO, SCpnt->device, "%s\n", __func__);
4130 spin_lock(&sdebug_host_list_lock);
4131 list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) {
4132 list_for_each_entry(devip, &sdbg_host->dev_info_list,
4133 dev_list) {
4134 set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm);
4135 ++k;
4136 }
4137 }
4138 spin_unlock(&sdebug_host_list_lock);
4139 stop_all_queued();
4140 if (SDEBUG_OPT_RESET_NOISE & sdebug_opts)
4141 sdev_printk(KERN_INFO, SCpnt->device,
4142 "%s: %d device(s) found\n", __func__, k);
4143 return SUCCESS;
4144}
4145
4146static void __init sdebug_build_parts(unsigned char *ramp,
4147 unsigned long store_size)
4148{
4149 struct partition *pp;
4150 int starts[SDEBUG_MAX_PARTS + 2];
4151 int sectors_per_part, num_sectors, k;
4152 int heads_by_sects, start_sec, end_sec;
4153
4154 /* assume partition table already zeroed */
4155 if ((sdebug_num_parts < 1) || (store_size < 1048576))
4156 return;
4157 if (sdebug_num_parts > SDEBUG_MAX_PARTS) {
4158 sdebug_num_parts = SDEBUG_MAX_PARTS;
4159 pr_warn("reducing partitions to %d\n", SDEBUG_MAX_PARTS);
4160 }
4161 num_sectors = (int)sdebug_store_sectors;
4162 sectors_per_part = (num_sectors - sdebug_sectors_per)
4163 / sdebug_num_parts;
4164 heads_by_sects = sdebug_heads * sdebug_sectors_per;
4165 starts[0] = sdebug_sectors_per;
4166 for (k = 1; k < sdebug_num_parts; ++k)
4167 starts[k] = ((k * sectors_per_part) / heads_by_sects)
4168 * heads_by_sects;
4169 starts[sdebug_num_parts] = num_sectors;
4170 starts[sdebug_num_parts + 1] = 0;
4171
4172 ramp[510] = 0x55; /* magic partition markings */
4173 ramp[511] = 0xAA;
4174 pp = (struct partition *)(ramp + 0x1be);
4175 for (k = 0; starts[k + 1]; ++k, ++pp) {
4176 start_sec = starts[k];
4177 end_sec = starts[k + 1] - 1;
4178 pp->boot_ind = 0;
4179
4180 pp->cyl = start_sec / heads_by_sects;
4181 pp->head = (start_sec - (pp->cyl * heads_by_sects))
4182 / sdebug_sectors_per;
4183 pp->sector = (start_sec % sdebug_sectors_per) + 1;
4184
4185 pp->end_cyl = end_sec / heads_by_sects;
4186 pp->end_head = (end_sec - (pp->end_cyl * heads_by_sects))
4187 / sdebug_sectors_per;
4188 pp->end_sector = (end_sec % sdebug_sectors_per) + 1;
4189
4190 pp->start_sect = cpu_to_le32(start_sec);
4191 pp->nr_sects = cpu_to_le32(end_sec - start_sec + 1);
4192 pp->sys_ind = 0x83; /* plain Linux partition */
4193 }
4194}
4195
4196static void block_unblock_all_queues(bool block)
4197{
4198 int j;
4199 struct sdebug_queue *sqp;
4200
4201 for (j = 0, sqp = sdebug_q_arr; j < submit_queues; ++j, ++sqp)
4202 atomic_set(&sqp->blocked, (int)block);
4203}
4204
4205/* Adjust (by rounding down) the sdebug_cmnd_count so abs(every_nth)-1
4206 * commands will be processed normally before triggers occur.
4207 */
4208static void tweak_cmnd_count(void)
4209{
4210 int count, modulo;
4211
4212 modulo = abs(sdebug_every_nth);
4213 if (modulo < 2)
4214 return;
4215 block_unblock_all_queues(true);
4216 count = atomic_read(&sdebug_cmnd_count);
4217 atomic_set(&sdebug_cmnd_count, (count / modulo) * modulo);
4218 block_unblock_all_queues(false);
4219}
4220
4221static void clear_queue_stats(void)
4222{
4223 atomic_set(&sdebug_cmnd_count, 0);
4224 atomic_set(&sdebug_completions, 0);
4225 atomic_set(&sdebug_miss_cpus, 0);
4226 atomic_set(&sdebug_a_tsf, 0);
4227}
4228
4229static void setup_inject(struct sdebug_queue *sqp,
4230 struct sdebug_queued_cmd *sqcp)
4231{
4232 if ((atomic_read(&sdebug_cmnd_count) % abs(sdebug_every_nth)) > 0) {
4233 if (sdebug_every_nth > 0)
4234 sqcp->inj_recovered = sqcp->inj_transport
4235 = sqcp->inj_dif
4236 = sqcp->inj_dix = sqcp->inj_short
4237 = sqcp->inj_host_busy = sqcp->inj_cmd_abort = 0;
4238 return;
4239 }
4240 sqcp->inj_recovered = !!(SDEBUG_OPT_RECOVERED_ERR & sdebug_opts);
4241 sqcp->inj_transport = !!(SDEBUG_OPT_TRANSPORT_ERR & sdebug_opts);
4242 sqcp->inj_dif = !!(SDEBUG_OPT_DIF_ERR & sdebug_opts);
4243 sqcp->inj_dix = !!(SDEBUG_OPT_DIX_ERR & sdebug_opts);
4244 sqcp->inj_short = !!(SDEBUG_OPT_SHORT_TRANSFER & sdebug_opts);
4245 sqcp->inj_host_busy = !!(SDEBUG_OPT_HOST_BUSY & sdebug_opts);
4246 sqcp->inj_cmd_abort = !!(SDEBUG_OPT_CMD_ABORT & sdebug_opts);
4247}
4248
4249/* Complete the processing of the thread that queued a SCSI command to this
4250 * driver. It either completes the command by calling cmnd_done() or
4251 * schedules a hr timer or work queue then returns 0. Returns
4252 * SCSI_MLQUEUE_HOST_BUSY if temporarily out of resources.
4253 */
4254static int schedule_resp(struct scsi_cmnd *cmnd, struct sdebug_dev_info *devip,
4255 int scsi_result,
4256 int (*pfp)(struct scsi_cmnd *,
4257 struct sdebug_dev_info *),
4258 int delta_jiff, int ndelay)
4259{
4260 unsigned long iflags;
4261 int k, num_in_q, qdepth, inject;
4262 struct sdebug_queue *sqp;
4263 struct sdebug_queued_cmd *sqcp;
4264 struct scsi_device *sdp;
4265 struct sdebug_defer *sd_dp;
4266
4267 if (unlikely(devip == NULL)) {
4268 if (scsi_result == 0)
4269 scsi_result = DID_NO_CONNECT << 16;
4270 goto respond_in_thread;
4271 }
4272 sdp = cmnd->device;
4273
4274 if (delta_jiff == 0)
4275 goto respond_in_thread;
4276
4277 /* schedule the response at a later time if resources permit */
4278 sqp = get_queue(cmnd);
4279 spin_lock_irqsave(&sqp->qc_lock, iflags);
4280 if (unlikely(atomic_read(&sqp->blocked))) {
4281 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
4282 return SCSI_MLQUEUE_HOST_BUSY;
4283 }
4284 num_in_q = atomic_read(&devip->num_in_q);
4285 qdepth = cmnd->device->queue_depth;
4286 inject = 0;
4287 if (unlikely((qdepth > 0) && (num_in_q >= qdepth))) {
4288 if (scsi_result) {
4289 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
4290 goto respond_in_thread;
4291 } else
4292 scsi_result = device_qfull_result;
4293 } else if (unlikely(sdebug_every_nth &&
4294 (SDEBUG_OPT_RARE_TSF & sdebug_opts) &&
4295 (scsi_result == 0))) {
4296 if ((num_in_q == (qdepth - 1)) &&
4297 (atomic_inc_return(&sdebug_a_tsf) >=
4298 abs(sdebug_every_nth))) {
4299 atomic_set(&sdebug_a_tsf, 0);
4300 inject = 1;
4301 scsi_result = device_qfull_result;
4302 }
4303 }
4304
4305 k = find_first_zero_bit(sqp->in_use_bm, sdebug_max_queue);
4306 if (unlikely(k >= sdebug_max_queue)) {
4307 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
4308 if (scsi_result)
4309 goto respond_in_thread;
4310 else if (SDEBUG_OPT_ALL_TSF & sdebug_opts)
4311 scsi_result = device_qfull_result;
4312 if (SDEBUG_OPT_Q_NOISE & sdebug_opts)
4313 sdev_printk(KERN_INFO, sdp,
4314 "%s: max_queue=%d exceeded, %s\n",
4315 __func__, sdebug_max_queue,
4316 (scsi_result ? "status: TASK SET FULL" :
4317 "report: host busy"));
4318 if (scsi_result)
4319 goto respond_in_thread;
4320 else
4321 return SCSI_MLQUEUE_HOST_BUSY;
4322 }
4323 __set_bit(k, sqp->in_use_bm);
4324 atomic_inc(&devip->num_in_q);
4325 sqcp = &sqp->qc_arr[k];
4326 sqcp->a_cmnd = cmnd;
4327 cmnd->host_scribble = (unsigned char *)sqcp;
4328 sd_dp = sqcp->sd_dp;
4329 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
4330 if (unlikely(sdebug_every_nth && sdebug_any_injecting_opt))
4331 setup_inject(sqp, sqcp);
4332 if (sd_dp == NULL) {
4333 sd_dp = kzalloc(sizeof(*sd_dp), GFP_ATOMIC);
4334 if (sd_dp == NULL)
4335 return SCSI_MLQUEUE_HOST_BUSY;
4336 }
4337
4338 cmnd->result = pfp != NULL ? pfp(cmnd, devip) : 0;
4339 if (cmnd->result & SDEG_RES_IMMED_MASK) {
4340 /*
4341 * This is the F_DELAY_OVERR case. No delay.
4342 */
4343 cmnd->result &= ~SDEG_RES_IMMED_MASK;
4344 delta_jiff = ndelay = 0;
4345 }
4346 if (cmnd->result == 0 && scsi_result != 0)
4347 cmnd->result = scsi_result;
4348
4349 if (unlikely(sdebug_verbose && cmnd->result))
4350 sdev_printk(KERN_INFO, sdp, "%s: non-zero result=0x%x\n",
4351 __func__, cmnd->result);
4352
4353 if (delta_jiff > 0 || ndelay > 0) {
4354 ktime_t kt;
4355
4356 if (delta_jiff > 0) {
4357 kt = ns_to_ktime((u64)delta_jiff * (NSEC_PER_SEC / HZ));
4358 } else
4359 kt = ndelay;
4360 if (!sd_dp->init_hrt) {
4361 sd_dp->init_hrt = true;
4362 sqcp->sd_dp = sd_dp;
4363 hrtimer_init(&sd_dp->hrt, CLOCK_MONOTONIC,
4364 HRTIMER_MODE_REL_PINNED);
4365 sd_dp->hrt.function = sdebug_q_cmd_hrt_complete;
4366 sd_dp->sqa_idx = sqp - sdebug_q_arr;
4367 sd_dp->qc_idx = k;
4368 }
4369 if (sdebug_statistics)
4370 sd_dp->issuing_cpu = raw_smp_processor_id();
4371 sd_dp->defer_t = SDEB_DEFER_HRT;
4372 hrtimer_start(&sd_dp->hrt, kt, HRTIMER_MODE_REL_PINNED);
4373 } else { /* jdelay < 0, use work queue */
4374 if (!sd_dp->init_wq) {
4375 sd_dp->init_wq = true;
4376 sqcp->sd_dp = sd_dp;
4377 sd_dp->sqa_idx = sqp - sdebug_q_arr;
4378 sd_dp->qc_idx = k;
4379 INIT_WORK(&sd_dp->ew.work, sdebug_q_cmd_wq_complete);
4380 }
4381 if (sdebug_statistics)
4382 sd_dp->issuing_cpu = raw_smp_processor_id();
4383 sd_dp->defer_t = SDEB_DEFER_WQ;
4384 if (unlikely(sqcp->inj_cmd_abort))
4385 sd_dp->aborted = true;
4386 schedule_work(&sd_dp->ew.work);
4387 if (unlikely(sqcp->inj_cmd_abort)) {
4388 sdev_printk(KERN_INFO, sdp, "abort request tag %d\n",
4389 cmnd->request->tag);
4390 blk_abort_request(cmnd->request);
4391 }
4392 }
4393 if (unlikely((SDEBUG_OPT_Q_NOISE & sdebug_opts) &&
4394 (scsi_result == device_qfull_result)))
4395 sdev_printk(KERN_INFO, sdp,
4396 "%s: num_in_q=%d +1, %s%s\n", __func__,
4397 num_in_q, (inject ? "<inject> " : ""),
4398 "status: TASK SET FULL");
4399 return 0;
4400
4401respond_in_thread: /* call back to mid-layer using invocation thread */
4402 cmnd->result = pfp != NULL ? pfp(cmnd, devip) : 0;
4403 cmnd->result &= ~SDEG_RES_IMMED_MASK;
4404 if (cmnd->result == 0 && scsi_result != 0)
4405 cmnd->result = scsi_result;
4406 cmnd->scsi_done(cmnd);
4407 return 0;
4408}
4409
4410/* Note: The following macros create attribute files in the
4411 /sys/module/scsi_debug/parameters directory. Unfortunately this
4412 driver is unaware of a change and cannot trigger auxiliary actions
4413 as it can when the corresponding attribute in the
4414 /sys/bus/pseudo/drivers/scsi_debug directory is changed.
4415 */
4416module_param_named(add_host, sdebug_add_host, int, S_IRUGO | S_IWUSR);
4417module_param_named(ato, sdebug_ato, int, S_IRUGO);
4418module_param_named(cdb_len, sdebug_cdb_len, int, 0644);
4419module_param_named(clustering, sdebug_clustering, bool, S_IRUGO | S_IWUSR);
4420module_param_named(delay, sdebug_jdelay, int, S_IRUGO | S_IWUSR);
4421module_param_named(dev_size_mb, sdebug_dev_size_mb, int, S_IRUGO);
4422module_param_named(dif, sdebug_dif, int, S_IRUGO);
4423module_param_named(dix, sdebug_dix, int, S_IRUGO);
4424module_param_named(dsense, sdebug_dsense, int, S_IRUGO | S_IWUSR);
4425module_param_named(every_nth, sdebug_every_nth, int, S_IRUGO | S_IWUSR);
4426module_param_named(fake_rw, sdebug_fake_rw, int, S_IRUGO | S_IWUSR);
4427module_param_named(guard, sdebug_guard, uint, S_IRUGO);
4428module_param_named(host_lock, sdebug_host_lock, bool, S_IRUGO | S_IWUSR);
4429module_param_string(inq_vendor, sdebug_inq_vendor_id,
4430 sizeof(sdebug_inq_vendor_id), S_IRUGO|S_IWUSR);
4431module_param_string(inq_product, sdebug_inq_product_id,
4432 sizeof(sdebug_inq_product_id), S_IRUGO|S_IWUSR);
4433module_param_string(inq_rev, sdebug_inq_product_rev,
4434 sizeof(sdebug_inq_product_rev), S_IRUGO|S_IWUSR);
4435module_param_named(lbpu, sdebug_lbpu, int, S_IRUGO);
4436module_param_named(lbpws, sdebug_lbpws, int, S_IRUGO);
4437module_param_named(lbpws10, sdebug_lbpws10, int, S_IRUGO);
4438module_param_named(lbprz, sdebug_lbprz, int, S_IRUGO);
4439module_param_named(lowest_aligned, sdebug_lowest_aligned, int, S_IRUGO);
4440module_param_named(max_luns, sdebug_max_luns, int, S_IRUGO | S_IWUSR);
4441module_param_named(max_queue, sdebug_max_queue, int, S_IRUGO | S_IWUSR);
4442module_param_named(medium_error_start, sdebug_medium_error_start, int, S_IRUGO | S_IWUSR);
4443module_param_named(medium_error_count, sdebug_medium_error_count, int, S_IRUGO | S_IWUSR);
4444module_param_named(ndelay, sdebug_ndelay, int, S_IRUGO | S_IWUSR);
4445module_param_named(no_lun_0, sdebug_no_lun_0, int, S_IRUGO | S_IWUSR);
4446module_param_named(no_uld, sdebug_no_uld, int, S_IRUGO);
4447module_param_named(num_parts, sdebug_num_parts, int, S_IRUGO);
4448module_param_named(num_tgts, sdebug_num_tgts, int, S_IRUGO | S_IWUSR);
4449module_param_named(opt_blks, sdebug_opt_blks, int, S_IRUGO);
4450module_param_named(opts, sdebug_opts, int, S_IRUGO | S_IWUSR);
4451module_param_named(physblk_exp, sdebug_physblk_exp, int, S_IRUGO);
4452module_param_named(opt_xferlen_exp, sdebug_opt_xferlen_exp, int, S_IRUGO);
4453module_param_named(ptype, sdebug_ptype, int, S_IRUGO | S_IWUSR);
4454module_param_named(removable, sdebug_removable, bool, S_IRUGO | S_IWUSR);
4455module_param_named(scsi_level, sdebug_scsi_level, int, S_IRUGO);
4456module_param_named(sector_size, sdebug_sector_size, int, S_IRUGO);
4457module_param_named(statistics, sdebug_statistics, bool, S_IRUGO | S_IWUSR);
4458module_param_named(strict, sdebug_strict, bool, S_IRUGO | S_IWUSR);
4459module_param_named(submit_queues, submit_queues, int, S_IRUGO);
4460module_param_named(unmap_alignment, sdebug_unmap_alignment, int, S_IRUGO);
4461module_param_named(unmap_granularity, sdebug_unmap_granularity, int, S_IRUGO);
4462module_param_named(unmap_max_blocks, sdebug_unmap_max_blocks, int, S_IRUGO);
4463module_param_named(unmap_max_desc, sdebug_unmap_max_desc, int, S_IRUGO);
4464module_param_named(virtual_gb, sdebug_virtual_gb, int, S_IRUGO | S_IWUSR);
4465module_param_named(uuid_ctl, sdebug_uuid_ctl, int, S_IRUGO);
4466module_param_named(vpd_use_hostno, sdebug_vpd_use_hostno, int,
4467 S_IRUGO | S_IWUSR);
4468module_param_named(wp, sdebug_wp, bool, S_IRUGO | S_IWUSR);
4469module_param_named(write_same_length, sdebug_write_same_length, int,
4470 S_IRUGO | S_IWUSR);
4471
4472MODULE_AUTHOR("Eric Youngdale + Douglas Gilbert");
4473MODULE_DESCRIPTION("SCSI debug adapter driver");
4474MODULE_LICENSE("GPL");
4475MODULE_VERSION(SDEBUG_VERSION);
4476
4477MODULE_PARM_DESC(add_host, "0..127 hosts allowed(def=1)");
4478MODULE_PARM_DESC(ato, "application tag ownership: 0=disk 1=host (def=1)");
4479MODULE_PARM_DESC(cdb_len, "suggest CDB lengths to drivers (def=10)");
4480MODULE_PARM_DESC(clustering, "when set enables larger transfers (def=0)");
4481MODULE_PARM_DESC(delay, "response delay (def=1 jiffy); 0:imm, -1,-2:tiny");
4482MODULE_PARM_DESC(dev_size_mb, "size in MiB of ram shared by devs(def=8)");
4483MODULE_PARM_DESC(dif, "data integrity field type: 0-3 (def=0)");
4484MODULE_PARM_DESC(dix, "data integrity extensions mask (def=0)");
4485MODULE_PARM_DESC(dsense, "use descriptor sense format(def=0 -> fixed)");
4486MODULE_PARM_DESC(every_nth, "timeout every nth command(def=0)");
4487MODULE_PARM_DESC(fake_rw, "fake reads/writes instead of copying (def=0)");
4488MODULE_PARM_DESC(guard, "protection checksum: 0=crc, 1=ip (def=0)");
4489MODULE_PARM_DESC(host_lock, "host_lock is ignored (def=0)");
4490MODULE_PARM_DESC(inq_vendor, "SCSI INQUIRY vendor string (def=\"Linux\")");
4491MODULE_PARM_DESC(inq_product, "SCSI INQUIRY product string (def=\"scsi_debug\")");
4492MODULE_PARM_DESC(inq_rev, "SCSI INQUIRY revision string (def=\""
4493 SDEBUG_VERSION "\")");
4494MODULE_PARM_DESC(lbpu, "enable LBP, support UNMAP command (def=0)");
4495MODULE_PARM_DESC(lbpws, "enable LBP, support WRITE SAME(16) with UNMAP bit (def=0)");
4496MODULE_PARM_DESC(lbpws10, "enable LBP, support WRITE SAME(10) with UNMAP bit (def=0)");
4497MODULE_PARM_DESC(lbprz,
4498 "on read unmapped LBs return 0 when 1 (def), return 0xff when 2");
4499MODULE_PARM_DESC(lowest_aligned, "lowest aligned lba (def=0)");
4500MODULE_PARM_DESC(max_luns, "number of LUNs per target to simulate(def=1)");
4501MODULE_PARM_DESC(max_queue, "max number of queued commands (1 to max(def))");
4502MODULE_PARM_DESC(medium_error_start, "starting sector number to return MEDIUM error");
4503MODULE_PARM_DESC(medium_error_count, "count of sectors to return follow on MEDIUM error");
4504MODULE_PARM_DESC(ndelay, "response delay in nanoseconds (def=0 -> ignore)");
4505MODULE_PARM_DESC(no_lun_0, "no LU number 0 (def=0 -> have lun 0)");
4506MODULE_PARM_DESC(no_uld, "stop ULD (e.g. sd driver) attaching (def=0))");
4507MODULE_PARM_DESC(num_parts, "number of partitions(def=0)");
4508MODULE_PARM_DESC(num_tgts, "number of targets per host to simulate(def=1)");
4509MODULE_PARM_DESC(opt_blks, "optimal transfer length in blocks (def=1024)");
4510MODULE_PARM_DESC(opts, "1->noise, 2->medium_err, 4->timeout, 8->recovered_err... (def=0)");
4511MODULE_PARM_DESC(physblk_exp, "physical block exponent (def=0)");
4512MODULE_PARM_DESC(opt_xferlen_exp, "optimal transfer length granularity exponent (def=physblk_exp)");
4513MODULE_PARM_DESC(ptype, "SCSI peripheral type(def=0[disk])");
4514MODULE_PARM_DESC(removable, "claim to have removable media (def=0)");
4515MODULE_PARM_DESC(scsi_level, "SCSI level to simulate(def=7[SPC-5])");
4516MODULE_PARM_DESC(sector_size, "logical block size in bytes (def=512)");
4517MODULE_PARM_DESC(statistics, "collect statistics on commands, queues (def=0)");
4518MODULE_PARM_DESC(strict, "stricter checks: reserved field in cdb (def=0)");
4519MODULE_PARM_DESC(submit_queues, "support for block multi-queue (def=1)");
4520MODULE_PARM_DESC(unmap_alignment, "lowest aligned thin provisioning lba (def=0)");
4521MODULE_PARM_DESC(unmap_granularity, "thin provisioning granularity in blocks (def=1)");
4522MODULE_PARM_DESC(unmap_max_blocks, "max # of blocks can be unmapped in one cmd (def=0xffffffff)");
4523MODULE_PARM_DESC(unmap_max_desc, "max # of ranges that can be unmapped in one cmd (def=256)");
4524MODULE_PARM_DESC(uuid_ctl,
4525 "1->use uuid for lu name, 0->don't, 2->all use same (def=0)");
4526MODULE_PARM_DESC(virtual_gb, "virtual gigabyte (GiB) size (def=0 -> use dev_size_mb)");
4527MODULE_PARM_DESC(vpd_use_hostno, "0 -> dev ids ignore hostno (def=1 -> unique dev ids)");
4528MODULE_PARM_DESC(wp, "Write Protect (def=0)");
4529MODULE_PARM_DESC(write_same_length, "Maximum blocks per WRITE SAME cmd (def=0xffff)");
4530
4531#define SDEBUG_INFO_LEN 256
4532static char sdebug_info[SDEBUG_INFO_LEN];
4533
4534static const char *scsi_debug_info(struct Scsi_Host *shp)
4535{
4536 int k;
4537
4538 k = scnprintf(sdebug_info, SDEBUG_INFO_LEN, "%s: version %s [%s]\n",
4539 my_name, SDEBUG_VERSION, sdebug_version_date);
4540 if (k >= (SDEBUG_INFO_LEN - 1))
4541 return sdebug_info;
4542 scnprintf(sdebug_info + k, SDEBUG_INFO_LEN - k,
4543 " dev_size_mb=%d, opts=0x%x, submit_queues=%d, %s=%d",
4544 sdebug_dev_size_mb, sdebug_opts, submit_queues,
4545 "statistics", (int)sdebug_statistics);
4546 return sdebug_info;
4547}
4548
4549/* 'echo <val> > /proc/scsi/scsi_debug/<host_id>' writes to opts */
4550static int scsi_debug_write_info(struct Scsi_Host *host, char *buffer,
4551 int length)
4552{
4553 char arr[16];
4554 int opts;
4555 int minLen = length > 15 ? 15 : length;
4556
4557 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
4558 return -EACCES;
4559 memcpy(arr, buffer, minLen);
4560 arr[minLen] = '\0';
4561 if (1 != sscanf(arr, "%d", &opts))
4562 return -EINVAL;
4563 sdebug_opts = opts;
4564 sdebug_verbose = !!(SDEBUG_OPT_NOISE & opts);
4565 sdebug_any_injecting_opt = !!(SDEBUG_OPT_ALL_INJECTING & opts);
4566 if (sdebug_every_nth != 0)
4567 tweak_cmnd_count();
4568 return length;
4569}
4570
4571/* Output seen with 'cat /proc/scsi/scsi_debug/<host_id>'. It will be the
4572 * same for each scsi_debug host (if more than one). Some of the counters
4573 * output are not atomics so might be inaccurate in a busy system. */
4574static int scsi_debug_show_info(struct seq_file *m, struct Scsi_Host *host)
4575{
4576 int f, j, l;
4577 struct sdebug_queue *sqp;
4578
4579 seq_printf(m, "scsi_debug adapter driver, version %s [%s]\n",
4580 SDEBUG_VERSION, sdebug_version_date);
4581 seq_printf(m, "num_tgts=%d, %ssize=%d MB, opts=0x%x, every_nth=%d\n",
4582 sdebug_num_tgts, "shared (ram) ", sdebug_dev_size_mb,
4583 sdebug_opts, sdebug_every_nth);
4584 seq_printf(m, "delay=%d, ndelay=%d, max_luns=%d, sector_size=%d %s\n",
4585 sdebug_jdelay, sdebug_ndelay, sdebug_max_luns,
4586 sdebug_sector_size, "bytes");
4587 seq_printf(m, "cylinders=%d, heads=%d, sectors=%d, command aborts=%d\n",
4588 sdebug_cylinders_per, sdebug_heads, sdebug_sectors_per,
4589 num_aborts);
4590 seq_printf(m, "RESETs: device=%d, target=%d, bus=%d, host=%d\n",
4591 num_dev_resets, num_target_resets, num_bus_resets,
4592 num_host_resets);
4593 seq_printf(m, "dix_reads=%d, dix_writes=%d, dif_errors=%d\n",
4594 dix_reads, dix_writes, dif_errors);
4595 seq_printf(m, "usec_in_jiffy=%lu, statistics=%d\n", TICK_NSEC / 1000,
4596 sdebug_statistics);
4597 seq_printf(m, "cmnd_count=%d, completions=%d, %s=%d, a_tsf=%d\n",
4598 atomic_read(&sdebug_cmnd_count),
4599 atomic_read(&sdebug_completions),
4600 "miss_cpus", atomic_read(&sdebug_miss_cpus),
4601 atomic_read(&sdebug_a_tsf));
4602
4603 seq_printf(m, "submit_queues=%d\n", submit_queues);
4604 for (j = 0, sqp = sdebug_q_arr; j < submit_queues; ++j, ++sqp) {
4605 seq_printf(m, " queue %d:\n", j);
4606 f = find_first_bit(sqp->in_use_bm, sdebug_max_queue);
4607 if (f != sdebug_max_queue) {
4608 l = find_last_bit(sqp->in_use_bm, sdebug_max_queue);
4609 seq_printf(m, " in_use_bm BUSY: %s: %d,%d\n",
4610 "first,last bits", f, l);
4611 }
4612 }
4613 return 0;
4614}
4615
4616static ssize_t delay_show(struct device_driver *ddp, char *buf)
4617{
4618 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_jdelay);
4619}
4620/* Returns -EBUSY if jdelay is being changed and commands are queued. The unit
4621 * of delay is jiffies.
4622 */
4623static ssize_t delay_store(struct device_driver *ddp, const char *buf,
4624 size_t count)
4625{
4626 int jdelay, res;
4627
4628 if (count > 0 && sscanf(buf, "%d", &jdelay) == 1) {
4629 res = count;
4630 if (sdebug_jdelay != jdelay) {
4631 int j, k;
4632 struct sdebug_queue *sqp;
4633
4634 block_unblock_all_queues(true);
4635 for (j = 0, sqp = sdebug_q_arr; j < submit_queues;
4636 ++j, ++sqp) {
4637 k = find_first_bit(sqp->in_use_bm,
4638 sdebug_max_queue);
4639 if (k != sdebug_max_queue) {
4640 res = -EBUSY; /* queued commands */
4641 break;
4642 }
4643 }
4644 if (res > 0) {
4645 sdebug_jdelay = jdelay;
4646 sdebug_ndelay = 0;
4647 }
4648 block_unblock_all_queues(false);
4649 }
4650 return res;
4651 }
4652 return -EINVAL;
4653}
4654static DRIVER_ATTR_RW(delay);
4655
4656static ssize_t ndelay_show(struct device_driver *ddp, char *buf)
4657{
4658 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_ndelay);
4659}
4660/* Returns -EBUSY if ndelay is being changed and commands are queued */
4661/* If > 0 and accepted then sdebug_jdelay is set to JDELAY_OVERRIDDEN */
4662static ssize_t ndelay_store(struct device_driver *ddp, const char *buf,
4663 size_t count)
4664{
4665 int ndelay, res;
4666
4667 if ((count > 0) && (1 == sscanf(buf, "%d", &ndelay)) &&
4668 (ndelay >= 0) && (ndelay < (1000 * 1000 * 1000))) {
4669 res = count;
4670 if (sdebug_ndelay != ndelay) {
4671 int j, k;
4672 struct sdebug_queue *sqp;
4673
4674 block_unblock_all_queues(true);
4675 for (j = 0, sqp = sdebug_q_arr; j < submit_queues;
4676 ++j, ++sqp) {
4677 k = find_first_bit(sqp->in_use_bm,
4678 sdebug_max_queue);
4679 if (k != sdebug_max_queue) {
4680 res = -EBUSY; /* queued commands */
4681 break;
4682 }
4683 }
4684 if (res > 0) {
4685 sdebug_ndelay = ndelay;
4686 sdebug_jdelay = ndelay ? JDELAY_OVERRIDDEN
4687 : DEF_JDELAY;
4688 }
4689 block_unblock_all_queues(false);
4690 }
4691 return res;
4692 }
4693 return -EINVAL;
4694}
4695static DRIVER_ATTR_RW(ndelay);
4696
4697static ssize_t opts_show(struct device_driver *ddp, char *buf)
4698{
4699 return scnprintf(buf, PAGE_SIZE, "0x%x\n", sdebug_opts);
4700}
4701
4702static ssize_t opts_store(struct device_driver *ddp, const char *buf,
4703 size_t count)
4704{
4705 int opts;
4706 char work[20];
4707
4708 if (sscanf(buf, "%10s", work) == 1) {
4709 if (strncasecmp(work, "0x", 2) == 0) {
4710 if (kstrtoint(work + 2, 16, &opts) == 0)
4711 goto opts_done;
4712 } else {
4713 if (kstrtoint(work, 10, &opts) == 0)
4714 goto opts_done;
4715 }
4716 }
4717 return -EINVAL;
4718opts_done:
4719 sdebug_opts = opts;
4720 sdebug_verbose = !!(SDEBUG_OPT_NOISE & opts);
4721 sdebug_any_injecting_opt = !!(SDEBUG_OPT_ALL_INJECTING & opts);
4722 tweak_cmnd_count();
4723 return count;
4724}
4725static DRIVER_ATTR_RW(opts);
4726
4727static ssize_t ptype_show(struct device_driver *ddp, char *buf)
4728{
4729 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_ptype);
4730}
4731static ssize_t ptype_store(struct device_driver *ddp, const char *buf,
4732 size_t count)
4733{
4734 int n;
4735
4736 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
4737 sdebug_ptype = n;
4738 return count;
4739 }
4740 return -EINVAL;
4741}
4742static DRIVER_ATTR_RW(ptype);
4743
4744static ssize_t dsense_show(struct device_driver *ddp, char *buf)
4745{
4746 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_dsense);
4747}
4748static ssize_t dsense_store(struct device_driver *ddp, const char *buf,
4749 size_t count)
4750{
4751 int n;
4752
4753 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
4754 sdebug_dsense = n;
4755 return count;
4756 }
4757 return -EINVAL;
4758}
4759static DRIVER_ATTR_RW(dsense);
4760
4761static ssize_t fake_rw_show(struct device_driver *ddp, char *buf)
4762{
4763 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_fake_rw);
4764}
4765static ssize_t fake_rw_store(struct device_driver *ddp, const char *buf,
4766 size_t count)
4767{
4768 int n;
4769
4770 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
4771 n = (n > 0);
4772 sdebug_fake_rw = (sdebug_fake_rw > 0);
4773 if (sdebug_fake_rw != n) {
4774 if ((0 == n) && (NULL == fake_storep)) {
4775 unsigned long sz =
4776 (unsigned long)sdebug_dev_size_mb *
4777 1048576;
4778
4779 fake_storep = vzalloc(sz);
4780 if (NULL == fake_storep) {
4781 pr_err("out of memory, 9\n");
4782 return -ENOMEM;
4783 }
4784 }
4785 sdebug_fake_rw = n;
4786 }
4787 return count;
4788 }
4789 return -EINVAL;
4790}
4791static DRIVER_ATTR_RW(fake_rw);
4792
4793static ssize_t no_lun_0_show(struct device_driver *ddp, char *buf)
4794{
4795 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_no_lun_0);
4796}
4797static ssize_t no_lun_0_store(struct device_driver *ddp, const char *buf,
4798 size_t count)
4799{
4800 int n;
4801
4802 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
4803 sdebug_no_lun_0 = n;
4804 return count;
4805 }
4806 return -EINVAL;
4807}
4808static DRIVER_ATTR_RW(no_lun_0);
4809
4810static ssize_t num_tgts_show(struct device_driver *ddp, char *buf)
4811{
4812 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_num_tgts);
4813}
4814static ssize_t num_tgts_store(struct device_driver *ddp, const char *buf,
4815 size_t count)
4816{
4817 int n;
4818
4819 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
4820 sdebug_num_tgts = n;
4821 sdebug_max_tgts_luns();
4822 return count;
4823 }
4824 return -EINVAL;
4825}
4826static DRIVER_ATTR_RW(num_tgts);
4827
4828static ssize_t dev_size_mb_show(struct device_driver *ddp, char *buf)
4829{
4830 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_dev_size_mb);
4831}
4832static DRIVER_ATTR_RO(dev_size_mb);
4833
4834static ssize_t num_parts_show(struct device_driver *ddp, char *buf)
4835{
4836 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_num_parts);
4837}
4838static DRIVER_ATTR_RO(num_parts);
4839
4840static ssize_t every_nth_show(struct device_driver *ddp, char *buf)
4841{
4842 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_every_nth);
4843}
4844static ssize_t every_nth_store(struct device_driver *ddp, const char *buf,
4845 size_t count)
4846{
4847 int nth;
4848
4849 if ((count > 0) && (1 == sscanf(buf, "%d", &nth))) {
4850 sdebug_every_nth = nth;
4851 if (nth && !sdebug_statistics) {
4852 pr_info("every_nth needs statistics=1, set it\n");
4853 sdebug_statistics = true;
4854 }
4855 tweak_cmnd_count();
4856 return count;
4857 }
4858 return -EINVAL;
4859}
4860static DRIVER_ATTR_RW(every_nth);
4861
4862static ssize_t max_luns_show(struct device_driver *ddp, char *buf)
4863{
4864 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_max_luns);
4865}
4866static ssize_t max_luns_store(struct device_driver *ddp, const char *buf,
4867 size_t count)
4868{
4869 int n;
4870 bool changed;
4871
4872 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
4873 if (n > 256) {
4874 pr_warn("max_luns can be no more than 256\n");
4875 return -EINVAL;
4876 }
4877 changed = (sdebug_max_luns != n);
4878 sdebug_max_luns = n;
4879 sdebug_max_tgts_luns();
4880 if (changed && (sdebug_scsi_level >= 5)) { /* >= SPC-3 */
4881 struct sdebug_host_info *sdhp;
4882 struct sdebug_dev_info *dp;
4883
4884 spin_lock(&sdebug_host_list_lock);
4885 list_for_each_entry(sdhp, &sdebug_host_list,
4886 host_list) {
4887 list_for_each_entry(dp, &sdhp->dev_info_list,
4888 dev_list) {
4889 set_bit(SDEBUG_UA_LUNS_CHANGED,
4890 dp->uas_bm);
4891 }
4892 }
4893 spin_unlock(&sdebug_host_list_lock);
4894 }
4895 return count;
4896 }
4897 return -EINVAL;
4898}
4899static DRIVER_ATTR_RW(max_luns);
4900
4901static ssize_t max_queue_show(struct device_driver *ddp, char *buf)
4902{
4903 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_max_queue);
4904}
4905/* N.B. max_queue can be changed while there are queued commands. In flight
4906 * commands beyond the new max_queue will be completed. */
4907static ssize_t max_queue_store(struct device_driver *ddp, const char *buf,
4908 size_t count)
4909{
4910 int j, n, k, a;
4911 struct sdebug_queue *sqp;
4912
4913 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n > 0) &&
4914 (n <= SDEBUG_CANQUEUE)) {
4915 block_unblock_all_queues(true);
4916 k = 0;
4917 for (j = 0, sqp = sdebug_q_arr; j < submit_queues;
4918 ++j, ++sqp) {
4919 a = find_last_bit(sqp->in_use_bm, SDEBUG_CANQUEUE);
4920 if (a > k)
4921 k = a;
4922 }
4923 sdebug_max_queue = n;
4924 if (k == SDEBUG_CANQUEUE)
4925 atomic_set(&retired_max_queue, 0);
4926 else if (k >= n)
4927 atomic_set(&retired_max_queue, k + 1);
4928 else
4929 atomic_set(&retired_max_queue, 0);
4930 block_unblock_all_queues(false);
4931 return count;
4932 }
4933 return -EINVAL;
4934}
4935static DRIVER_ATTR_RW(max_queue);
4936
4937static ssize_t no_uld_show(struct device_driver *ddp, char *buf)
4938{
4939 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_no_uld);
4940}
4941static DRIVER_ATTR_RO(no_uld);
4942
4943static ssize_t scsi_level_show(struct device_driver *ddp, char *buf)
4944{
4945 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_scsi_level);
4946}
4947static DRIVER_ATTR_RO(scsi_level);
4948
4949static ssize_t virtual_gb_show(struct device_driver *ddp, char *buf)
4950{
4951 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_virtual_gb);
4952}
4953static ssize_t virtual_gb_store(struct device_driver *ddp, const char *buf,
4954 size_t count)
4955{
4956 int n;
4957 bool changed;
4958
4959 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
4960 changed = (sdebug_virtual_gb != n);
4961 sdebug_virtual_gb = n;
4962 sdebug_capacity = get_sdebug_capacity();
4963 if (changed) {
4964 struct sdebug_host_info *sdhp;
4965 struct sdebug_dev_info *dp;
4966
4967 spin_lock(&sdebug_host_list_lock);
4968 list_for_each_entry(sdhp, &sdebug_host_list,
4969 host_list) {
4970 list_for_each_entry(dp, &sdhp->dev_info_list,
4971 dev_list) {
4972 set_bit(SDEBUG_UA_CAPACITY_CHANGED,
4973 dp->uas_bm);
4974 }
4975 }
4976 spin_unlock(&sdebug_host_list_lock);
4977 }
4978 return count;
4979 }
4980 return -EINVAL;
4981}
4982static DRIVER_ATTR_RW(virtual_gb);
4983
4984static ssize_t add_host_show(struct device_driver *ddp, char *buf)
4985{
4986 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_add_host);
4987}
4988
4989static int sdebug_add_adapter(void);
4990static void sdebug_remove_adapter(void);
4991
4992static ssize_t add_host_store(struct device_driver *ddp, const char *buf,
4993 size_t count)
4994{
4995 int delta_hosts;
4996
4997 if (sscanf(buf, "%d", &delta_hosts) != 1)
4998 return -EINVAL;
4999 if (delta_hosts > 0) {
5000 do {
5001 sdebug_add_adapter();
5002 } while (--delta_hosts);
5003 } else if (delta_hosts < 0) {
5004 do {
5005 sdebug_remove_adapter();
5006 } while (++delta_hosts);
5007 }
5008 return count;
5009}
5010static DRIVER_ATTR_RW(add_host);
5011
5012static ssize_t vpd_use_hostno_show(struct device_driver *ddp, char *buf)
5013{
5014 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_vpd_use_hostno);
5015}
5016static ssize_t vpd_use_hostno_store(struct device_driver *ddp, const char *buf,
5017 size_t count)
5018{
5019 int n;
5020
5021 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
5022 sdebug_vpd_use_hostno = n;
5023 return count;
5024 }
5025 return -EINVAL;
5026}
5027static DRIVER_ATTR_RW(vpd_use_hostno);
5028
5029static ssize_t statistics_show(struct device_driver *ddp, char *buf)
5030{
5031 return scnprintf(buf, PAGE_SIZE, "%d\n", (int)sdebug_statistics);
5032}
5033static ssize_t statistics_store(struct device_driver *ddp, const char *buf,
5034 size_t count)
5035{
5036 int n;
5037
5038 if ((count > 0) && (sscanf(buf, "%d", &n) == 1) && (n >= 0)) {
5039 if (n > 0)
5040 sdebug_statistics = true;
5041 else {
5042 clear_queue_stats();
5043 sdebug_statistics = false;
5044 }
5045 return count;
5046 }
5047 return -EINVAL;
5048}
5049static DRIVER_ATTR_RW(statistics);
5050
5051static ssize_t sector_size_show(struct device_driver *ddp, char *buf)
5052{
5053 return scnprintf(buf, PAGE_SIZE, "%u\n", sdebug_sector_size);
5054}
5055static DRIVER_ATTR_RO(sector_size);
5056
5057static ssize_t submit_queues_show(struct device_driver *ddp, char *buf)
5058{
5059 return scnprintf(buf, PAGE_SIZE, "%d\n", submit_queues);
5060}
5061static DRIVER_ATTR_RO(submit_queues);
5062
5063static ssize_t dix_show(struct device_driver *ddp, char *buf)
5064{
5065 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_dix);
5066}
5067static DRIVER_ATTR_RO(dix);
5068
5069static ssize_t dif_show(struct device_driver *ddp, char *buf)
5070{
5071 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_dif);
5072}
5073static DRIVER_ATTR_RO(dif);
5074
5075static ssize_t guard_show(struct device_driver *ddp, char *buf)
5076{
5077 return scnprintf(buf, PAGE_SIZE, "%u\n", sdebug_guard);
5078}
5079static DRIVER_ATTR_RO(guard);
5080
5081static ssize_t ato_show(struct device_driver *ddp, char *buf)
5082{
5083 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_ato);
5084}
5085static DRIVER_ATTR_RO(ato);
5086
5087static ssize_t map_show(struct device_driver *ddp, char *buf)
5088{
5089 ssize_t count;
5090
5091 if (!scsi_debug_lbp())
5092 return scnprintf(buf, PAGE_SIZE, "0-%u\n",
5093 sdebug_store_sectors);
5094
5095 count = scnprintf(buf, PAGE_SIZE - 1, "%*pbl",
5096 (int)map_size, map_storep);
5097 buf[count++] = '\n';
5098 buf[count] = '\0';
5099
5100 return count;
5101}
5102static DRIVER_ATTR_RO(map);
5103
5104static ssize_t removable_show(struct device_driver *ddp, char *buf)
5105{
5106 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_removable ? 1 : 0);
5107}
5108static ssize_t removable_store(struct device_driver *ddp, const char *buf,
5109 size_t count)
5110{
5111 int n;
5112
5113 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
5114 sdebug_removable = (n > 0);
5115 return count;
5116 }
5117 return -EINVAL;
5118}
5119static DRIVER_ATTR_RW(removable);
5120
5121static ssize_t host_lock_show(struct device_driver *ddp, char *buf)
5122{
5123 return scnprintf(buf, PAGE_SIZE, "%d\n", !!sdebug_host_lock);
5124}
5125/* N.B. sdebug_host_lock does nothing, kept for backward compatibility */
5126static ssize_t host_lock_store(struct device_driver *ddp, const char *buf,
5127 size_t count)
5128{
5129 int n;
5130
5131 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
5132 sdebug_host_lock = (n > 0);
5133 return count;
5134 }
5135 return -EINVAL;
5136}
5137static DRIVER_ATTR_RW(host_lock);
5138
5139static ssize_t strict_show(struct device_driver *ddp, char *buf)
5140{
5141 return scnprintf(buf, PAGE_SIZE, "%d\n", !!sdebug_strict);
5142}
5143static ssize_t strict_store(struct device_driver *ddp, const char *buf,
5144 size_t count)
5145{
5146 int n;
5147
5148 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
5149 sdebug_strict = (n > 0);
5150 return count;
5151 }
5152 return -EINVAL;
5153}
5154static DRIVER_ATTR_RW(strict);
5155
5156static ssize_t uuid_ctl_show(struct device_driver *ddp, char *buf)
5157{
5158 return scnprintf(buf, PAGE_SIZE, "%d\n", !!sdebug_uuid_ctl);
5159}
5160static DRIVER_ATTR_RO(uuid_ctl);
5161
5162static ssize_t cdb_len_show(struct device_driver *ddp, char *buf)
5163{
5164 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_cdb_len);
5165}
5166static ssize_t cdb_len_store(struct device_driver *ddp, const char *buf,
5167 size_t count)
5168{
5169 int ret, n;
5170
5171 ret = kstrtoint(buf, 0, &n);
5172 if (ret)
5173 return ret;
5174 sdebug_cdb_len = n;
5175 all_config_cdb_len();
5176 return count;
5177}
5178static DRIVER_ATTR_RW(cdb_len);
5179
5180
5181/* Note: The following array creates attribute files in the
5182 /sys/bus/pseudo/drivers/scsi_debug directory. The advantage of these
5183 files (over those found in the /sys/module/scsi_debug/parameters
5184 directory) is that auxiliary actions can be triggered when an attribute
5185 is changed. For example see: sdebug_add_host_store() above.
5186 */
5187
5188static struct attribute *sdebug_drv_attrs[] = {
5189 &driver_attr_delay.attr,
5190 &driver_attr_opts.attr,
5191 &driver_attr_ptype.attr,
5192 &driver_attr_dsense.attr,
5193 &driver_attr_fake_rw.attr,
5194 &driver_attr_no_lun_0.attr,
5195 &driver_attr_num_tgts.attr,
5196 &driver_attr_dev_size_mb.attr,
5197 &driver_attr_num_parts.attr,
5198 &driver_attr_every_nth.attr,
5199 &driver_attr_max_luns.attr,
5200 &driver_attr_max_queue.attr,
5201 &driver_attr_no_uld.attr,
5202 &driver_attr_scsi_level.attr,
5203 &driver_attr_virtual_gb.attr,
5204 &driver_attr_add_host.attr,
5205 &driver_attr_vpd_use_hostno.attr,
5206 &driver_attr_sector_size.attr,
5207 &driver_attr_statistics.attr,
5208 &driver_attr_submit_queues.attr,
5209 &driver_attr_dix.attr,
5210 &driver_attr_dif.attr,
5211 &driver_attr_guard.attr,
5212 &driver_attr_ato.attr,
5213 &driver_attr_map.attr,
5214 &driver_attr_removable.attr,
5215 &driver_attr_host_lock.attr,
5216 &driver_attr_ndelay.attr,
5217 &driver_attr_strict.attr,
5218 &driver_attr_uuid_ctl.attr,
5219 &driver_attr_cdb_len.attr,
5220 NULL,
5221};
5222ATTRIBUTE_GROUPS(sdebug_drv);
5223
5224static struct device *pseudo_primary;
5225
5226static int __init scsi_debug_init(void)
5227{
5228 unsigned long sz;
5229 int host_to_add;
5230 int k;
5231 int ret;
5232
5233 atomic_set(&retired_max_queue, 0);
5234
5235 if (sdebug_ndelay >= 1000 * 1000 * 1000) {
5236 pr_warn("ndelay must be less than 1 second, ignored\n");
5237 sdebug_ndelay = 0;
5238 } else if (sdebug_ndelay > 0)
5239 sdebug_jdelay = JDELAY_OVERRIDDEN;
5240
5241 switch (sdebug_sector_size) {
5242 case 512:
5243 case 1024:
5244 case 2048:
5245 case 4096:
5246 break;
5247 default:
5248 pr_err("invalid sector_size %d\n", sdebug_sector_size);
5249 return -EINVAL;
5250 }
5251
5252 switch (sdebug_dif) {
5253 case T10_PI_TYPE0_PROTECTION:
5254 break;
5255 case T10_PI_TYPE1_PROTECTION:
5256 case T10_PI_TYPE2_PROTECTION:
5257 case T10_PI_TYPE3_PROTECTION:
5258 have_dif_prot = true;
5259 break;
5260
5261 default:
5262 pr_err("dif must be 0, 1, 2 or 3\n");
5263 return -EINVAL;
5264 }
5265
5266 if (sdebug_guard > 1) {
5267 pr_err("guard must be 0 or 1\n");
5268 return -EINVAL;
5269 }
5270
5271 if (sdebug_ato > 1) {
5272 pr_err("ato must be 0 or 1\n");
5273 return -EINVAL;
5274 }
5275
5276 if (sdebug_physblk_exp > 15) {
5277 pr_err("invalid physblk_exp %u\n", sdebug_physblk_exp);
5278 return -EINVAL;
5279 }
5280 if (sdebug_max_luns > 256) {
5281 pr_warn("max_luns can be no more than 256, use default\n");
5282 sdebug_max_luns = DEF_MAX_LUNS;
5283 }
5284
5285 if (sdebug_lowest_aligned > 0x3fff) {
5286 pr_err("lowest_aligned too big: %u\n", sdebug_lowest_aligned);
5287 return -EINVAL;
5288 }
5289
5290 if (submit_queues < 1) {
5291 pr_err("submit_queues must be 1 or more\n");
5292 return -EINVAL;
5293 }
5294 sdebug_q_arr = kcalloc(submit_queues, sizeof(struct sdebug_queue),
5295 GFP_KERNEL);
5296 if (sdebug_q_arr == NULL)
5297 return -ENOMEM;
5298 for (k = 0; k < submit_queues; ++k)
5299 spin_lock_init(&sdebug_q_arr[k].qc_lock);
5300
5301 if (sdebug_dev_size_mb < 1)
5302 sdebug_dev_size_mb = 1; /* force minimum 1 MB ramdisk */
5303 sz = (unsigned long)sdebug_dev_size_mb * 1048576;
5304 sdebug_store_sectors = sz / sdebug_sector_size;
5305 sdebug_capacity = get_sdebug_capacity();
5306
5307 /* play around with geometry, don't waste too much on track 0 */
5308 sdebug_heads = 8;
5309 sdebug_sectors_per = 32;
5310 if (sdebug_dev_size_mb >= 256)
5311 sdebug_heads = 64;
5312 else if (sdebug_dev_size_mb >= 16)
5313 sdebug_heads = 32;
5314 sdebug_cylinders_per = (unsigned long)sdebug_capacity /
5315 (sdebug_sectors_per * sdebug_heads);
5316 if (sdebug_cylinders_per >= 1024) {
5317 /* other LLDs do this; implies >= 1GB ram disk ... */
5318 sdebug_heads = 255;
5319 sdebug_sectors_per = 63;
5320 sdebug_cylinders_per = (unsigned long)sdebug_capacity /
5321 (sdebug_sectors_per * sdebug_heads);
5322 }
5323
5324 if (sdebug_fake_rw == 0) {
5325 fake_storep = vzalloc(sz);
5326 if (NULL == fake_storep) {
5327 pr_err("out of memory, 1\n");
5328 ret = -ENOMEM;
5329 goto free_q_arr;
5330 }
5331 if (sdebug_num_parts > 0)
5332 sdebug_build_parts(fake_storep, sz);
5333 }
5334
5335 if (sdebug_dix) {
5336 int dif_size;
5337
5338 dif_size = sdebug_store_sectors * sizeof(struct t10_pi_tuple);
5339 dif_storep = vmalloc(dif_size);
5340
5341 pr_err("dif_storep %u bytes @ %p\n", dif_size, dif_storep);
5342
5343 if (dif_storep == NULL) {
5344 pr_err("out of mem. (DIX)\n");
5345 ret = -ENOMEM;
5346 goto free_vm;
5347 }
5348
5349 memset(dif_storep, 0xff, dif_size);
5350 }
5351
5352 /* Logical Block Provisioning */
5353 if (scsi_debug_lbp()) {
5354 sdebug_unmap_max_blocks =
5355 clamp(sdebug_unmap_max_blocks, 0U, 0xffffffffU);
5356
5357 sdebug_unmap_max_desc =
5358 clamp(sdebug_unmap_max_desc, 0U, 256U);
5359
5360 sdebug_unmap_granularity =
5361 clamp(sdebug_unmap_granularity, 1U, 0xffffffffU);
5362
5363 if (sdebug_unmap_alignment &&
5364 sdebug_unmap_granularity <=
5365 sdebug_unmap_alignment) {
5366 pr_err("ERR: unmap_granularity <= unmap_alignment\n");
5367 ret = -EINVAL;
5368 goto free_vm;
5369 }
5370
5371 map_size = lba_to_map_index(sdebug_store_sectors - 1) + 1;
5372 map_storep = vmalloc(array_size(sizeof(long),
5373 BITS_TO_LONGS(map_size)));
5374
5375 pr_info("%lu provisioning blocks\n", map_size);
5376
5377 if (map_storep == NULL) {
5378 pr_err("out of mem. (MAP)\n");
5379 ret = -ENOMEM;
5380 goto free_vm;
5381 }
5382
5383 bitmap_zero(map_storep, map_size);
5384
5385 /* Map first 1KB for partition table */
5386 if (sdebug_num_parts)
5387 map_region(0, 2);
5388 }
5389
5390 pseudo_primary = root_device_register("pseudo_0");
5391 if (IS_ERR(pseudo_primary)) {
5392 pr_warn("root_device_register() error\n");
5393 ret = PTR_ERR(pseudo_primary);
5394 goto free_vm;
5395 }
5396 ret = bus_register(&pseudo_lld_bus);
5397 if (ret < 0) {
5398 pr_warn("bus_register error: %d\n", ret);
5399 goto dev_unreg;
5400 }
5401 ret = driver_register(&sdebug_driverfs_driver);
5402 if (ret < 0) {
5403 pr_warn("driver_register error: %d\n", ret);
5404 goto bus_unreg;
5405 }
5406
5407 host_to_add = sdebug_add_host;
5408 sdebug_add_host = 0;
5409
5410 for (k = 0; k < host_to_add; k++) {
5411 if (sdebug_add_adapter()) {
5412 pr_err("sdebug_add_adapter failed k=%d\n", k);
5413 break;
5414 }
5415 }
5416
5417 if (sdebug_verbose)
5418 pr_info("built %d host(s)\n", sdebug_add_host);
5419
5420 return 0;
5421
5422bus_unreg:
5423 bus_unregister(&pseudo_lld_bus);
5424dev_unreg:
5425 root_device_unregister(pseudo_primary);
5426free_vm:
5427 vfree(map_storep);
5428 vfree(dif_storep);
5429 vfree(fake_storep);
5430free_q_arr:
5431 kfree(sdebug_q_arr);
5432 return ret;
5433}
5434
5435static void __exit scsi_debug_exit(void)
5436{
5437 int k = sdebug_add_host;
5438
5439 stop_all_queued();
5440 for (; k; k--)
5441 sdebug_remove_adapter();
5442 free_all_queued();
5443 driver_unregister(&sdebug_driverfs_driver);
5444 bus_unregister(&pseudo_lld_bus);
5445 root_device_unregister(pseudo_primary);
5446
5447 vfree(map_storep);
5448 vfree(dif_storep);
5449 vfree(fake_storep);
5450 kfree(sdebug_q_arr);
5451}
5452
5453device_initcall(scsi_debug_init);
5454module_exit(scsi_debug_exit);
5455
5456static void sdebug_release_adapter(struct device *dev)
5457{
5458 struct sdebug_host_info *sdbg_host;
5459
5460 sdbg_host = to_sdebug_host(dev);
5461 kfree(sdbg_host);
5462}
5463
5464static int sdebug_add_adapter(void)
5465{
5466 int k, devs_per_host;
5467 int error = 0;
5468 struct sdebug_host_info *sdbg_host;
5469 struct sdebug_dev_info *sdbg_devinfo, *tmp;
5470
5471 sdbg_host = kzalloc(sizeof(*sdbg_host), GFP_KERNEL);
5472 if (sdbg_host == NULL) {
5473 pr_err("out of memory at line %d\n", __LINE__);
5474 return -ENOMEM;
5475 }
5476
5477 INIT_LIST_HEAD(&sdbg_host->dev_info_list);
5478
5479 devs_per_host = sdebug_num_tgts * sdebug_max_luns;
5480 for (k = 0; k < devs_per_host; k++) {
5481 sdbg_devinfo = sdebug_device_create(sdbg_host, GFP_KERNEL);
5482 if (!sdbg_devinfo) {
5483 pr_err("out of memory at line %d\n", __LINE__);
5484 error = -ENOMEM;
5485 goto clean;
5486 }
5487 }
5488
5489 spin_lock(&sdebug_host_list_lock);
5490 list_add_tail(&sdbg_host->host_list, &sdebug_host_list);
5491 spin_unlock(&sdebug_host_list_lock);
5492
5493 sdbg_host->dev.bus = &pseudo_lld_bus;
5494 sdbg_host->dev.parent = pseudo_primary;
5495 sdbg_host->dev.release = &sdebug_release_adapter;
5496 dev_set_name(&sdbg_host->dev, "adapter%d", sdebug_add_host);
5497
5498 error = device_register(&sdbg_host->dev);
5499
5500 if (error)
5501 goto clean;
5502
5503 ++sdebug_add_host;
5504 return error;
5505
5506clean:
5507 list_for_each_entry_safe(sdbg_devinfo, tmp, &sdbg_host->dev_info_list,
5508 dev_list) {
5509 list_del(&sdbg_devinfo->dev_list);
5510 kfree(sdbg_devinfo);
5511 }
5512
5513 kfree(sdbg_host);
5514 return error;
5515}
5516
5517static void sdebug_remove_adapter(void)
5518{
5519 struct sdebug_host_info *sdbg_host = NULL;
5520
5521 spin_lock(&sdebug_host_list_lock);
5522 if (!list_empty(&sdebug_host_list)) {
5523 sdbg_host = list_entry(sdebug_host_list.prev,
5524 struct sdebug_host_info, host_list);
5525 list_del(&sdbg_host->host_list);
5526 }
5527 spin_unlock(&sdebug_host_list_lock);
5528
5529 if (!sdbg_host)
5530 return;
5531
5532 device_unregister(&sdbg_host->dev);
5533 --sdebug_add_host;
5534}
5535
5536static int sdebug_change_qdepth(struct scsi_device *sdev, int qdepth)
5537{
5538 int num_in_q = 0;
5539 struct sdebug_dev_info *devip;
5540
5541 block_unblock_all_queues(true);
5542 devip = (struct sdebug_dev_info *)sdev->hostdata;
5543 if (NULL == devip) {
5544 block_unblock_all_queues(false);
5545 return -ENODEV;
5546 }
5547 num_in_q = atomic_read(&devip->num_in_q);
5548
5549 if (qdepth < 1)
5550 qdepth = 1;
5551 /* allow to exceed max host qc_arr elements for testing */
5552 if (qdepth > SDEBUG_CANQUEUE + 10)
5553 qdepth = SDEBUG_CANQUEUE + 10;
5554 scsi_change_queue_depth(sdev, qdepth);
5555
5556 if (SDEBUG_OPT_Q_NOISE & sdebug_opts) {
5557 sdev_printk(KERN_INFO, sdev, "%s: qdepth=%d, num_in_q=%d\n",
5558 __func__, qdepth, num_in_q);
5559 }
5560 block_unblock_all_queues(false);
5561 return sdev->queue_depth;
5562}
5563
5564static bool fake_timeout(struct scsi_cmnd *scp)
5565{
5566 if (0 == (atomic_read(&sdebug_cmnd_count) % abs(sdebug_every_nth))) {
5567 if (sdebug_every_nth < -1)
5568 sdebug_every_nth = -1;
5569 if (SDEBUG_OPT_TIMEOUT & sdebug_opts)
5570 return true; /* ignore command causing timeout */
5571 else if (SDEBUG_OPT_MAC_TIMEOUT & sdebug_opts &&
5572 scsi_medium_access_command(scp))
5573 return true; /* time out reads and writes */
5574 }
5575 return false;
5576}
5577
5578static bool fake_host_busy(struct scsi_cmnd *scp)
5579{
5580 return (sdebug_opts & SDEBUG_OPT_HOST_BUSY) &&
5581 (atomic_read(&sdebug_cmnd_count) % abs(sdebug_every_nth)) == 0;
5582}
5583
5584static int scsi_debug_queuecommand(struct Scsi_Host *shost,
5585 struct scsi_cmnd *scp)
5586{
5587 u8 sdeb_i;
5588 struct scsi_device *sdp = scp->device;
5589 const struct opcode_info_t *oip;
5590 const struct opcode_info_t *r_oip;
5591 struct sdebug_dev_info *devip;
5592 u8 *cmd = scp->cmnd;
5593 int (*r_pfp)(struct scsi_cmnd *, struct sdebug_dev_info *);
5594 int (*pfp)(struct scsi_cmnd *, struct sdebug_dev_info *) = NULL;
5595 int k, na;
5596 int errsts = 0;
5597 u32 flags;
5598 u16 sa;
5599 u8 opcode = cmd[0];
5600 bool has_wlun_rl;
5601
5602 scsi_set_resid(scp, 0);
5603 if (sdebug_statistics)
5604 atomic_inc(&sdebug_cmnd_count);
5605 if (unlikely(sdebug_verbose &&
5606 !(SDEBUG_OPT_NO_CDB_NOISE & sdebug_opts))) {
5607 char b[120];
5608 int n, len, sb;
5609
5610 len = scp->cmd_len;
5611 sb = (int)sizeof(b);
5612 if (len > 32)
5613 strcpy(b, "too long, over 32 bytes");
5614 else {
5615 for (k = 0, n = 0; k < len && n < sb; ++k)
5616 n += scnprintf(b + n, sb - n, "%02x ",
5617 (u32)cmd[k]);
5618 }
5619 sdev_printk(KERN_INFO, sdp, "%s: tag=%#x, cmd %s\n", my_name,
5620 blk_mq_unique_tag(scp->request), b);
5621 }
5622 if (fake_host_busy(scp))
5623 return SCSI_MLQUEUE_HOST_BUSY;
5624 has_wlun_rl = (sdp->lun == SCSI_W_LUN_REPORT_LUNS);
5625 if (unlikely((sdp->lun >= sdebug_max_luns) && !has_wlun_rl))
5626 goto err_out;
5627
5628 sdeb_i = opcode_ind_arr[opcode]; /* fully mapped */
5629 oip = &opcode_info_arr[sdeb_i]; /* safe if table consistent */
5630 devip = (struct sdebug_dev_info *)sdp->hostdata;
5631 if (unlikely(!devip)) {
5632 devip = find_build_dev_info(sdp);
5633 if (NULL == devip)
5634 goto err_out;
5635 }
5636 na = oip->num_attached;
5637 r_pfp = oip->pfp;
5638 if (na) { /* multiple commands with this opcode */
5639 r_oip = oip;
5640 if (FF_SA & r_oip->flags) {
5641 if (F_SA_LOW & oip->flags)
5642 sa = 0x1f & cmd[1];
5643 else
5644 sa = get_unaligned_be16(cmd + 8);
5645 for (k = 0; k <= na; oip = r_oip->arrp + k++) {
5646 if (opcode == oip->opcode && sa == oip->sa)
5647 break;
5648 }
5649 } else { /* since no service action only check opcode */
5650 for (k = 0; k <= na; oip = r_oip->arrp + k++) {
5651 if (opcode == oip->opcode)
5652 break;
5653 }
5654 }
5655 if (k > na) {
5656 if (F_SA_LOW & r_oip->flags)
5657 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 4);
5658 else if (F_SA_HIGH & r_oip->flags)
5659 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 8, 7);
5660 else
5661 mk_sense_invalid_opcode(scp);
5662 goto check_cond;
5663 }
5664 } /* else (when na==0) we assume the oip is a match */
5665 flags = oip->flags;
5666 if (unlikely(F_INV_OP & flags)) {
5667 mk_sense_invalid_opcode(scp);
5668 goto check_cond;
5669 }
5670 if (unlikely(has_wlun_rl && !(F_RL_WLUN_OK & flags))) {
5671 if (sdebug_verbose)
5672 sdev_printk(KERN_INFO, sdp, "%s: Opcode 0x%x not%s\n",
5673 my_name, opcode, " supported for wlun");
5674 mk_sense_invalid_opcode(scp);
5675 goto check_cond;
5676 }
5677 if (unlikely(sdebug_strict)) { /* check cdb against mask */
5678 u8 rem;
5679 int j;
5680
5681 for (k = 1; k < oip->len_mask[0] && k < 16; ++k) {
5682 rem = ~oip->len_mask[k] & cmd[k];
5683 if (rem) {
5684 for (j = 7; j >= 0; --j, rem <<= 1) {
5685 if (0x80 & rem)
5686 break;
5687 }
5688 mk_sense_invalid_fld(scp, SDEB_IN_CDB, k, j);
5689 goto check_cond;
5690 }
5691 }
5692 }
5693 if (unlikely(!(F_SKIP_UA & flags) &&
5694 find_first_bit(devip->uas_bm,
5695 SDEBUG_NUM_UAS) != SDEBUG_NUM_UAS)) {
5696 errsts = make_ua(scp, devip);
5697 if (errsts)
5698 goto check_cond;
5699 }
5700 if (unlikely((F_M_ACCESS & flags) && atomic_read(&devip->stopped))) {
5701 mk_sense_buffer(scp, NOT_READY, LOGICAL_UNIT_NOT_READY, 0x2);
5702 if (sdebug_verbose)
5703 sdev_printk(KERN_INFO, sdp, "%s reports: Not ready: "
5704 "%s\n", my_name, "initializing command "
5705 "required");
5706 errsts = check_condition_result;
5707 goto fini;
5708 }
5709 if (sdebug_fake_rw && (F_FAKE_RW & flags))
5710 goto fini;
5711 if (unlikely(sdebug_every_nth)) {
5712 if (fake_timeout(scp))
5713 return 0; /* ignore command: make trouble */
5714 }
5715 if (likely(oip->pfp))
5716 pfp = oip->pfp; /* calls a resp_* function */
5717 else
5718 pfp = r_pfp; /* if leaf function ptr NULL, try the root's */
5719
5720fini:
5721 if (F_DELAY_OVERR & flags)
5722 return schedule_resp(scp, devip, errsts, pfp, 0, 0);
5723 else if ((flags & F_LONG_DELAY) && (sdebug_jdelay > 0 ||
5724 sdebug_ndelay > 10000)) {
5725 /*
5726 * Skip long delays if ndelay <= 10 microseconds. Otherwise
5727 * for Start Stop Unit (SSU) want at least 1 second delay and
5728 * if sdebug_jdelay>1 want a long delay of that many seconds.
5729 * For Synchronize Cache want 1/20 of SSU's delay.
5730 */
5731 int jdelay = (sdebug_jdelay < 2) ? 1 : sdebug_jdelay;
5732 int denom = (flags & F_SYNC_DELAY) ? 20 : 1;
5733
5734 jdelay = mult_frac(USER_HZ * jdelay, HZ, denom * USER_HZ);
5735 return schedule_resp(scp, devip, errsts, pfp, jdelay, 0);
5736 } else
5737 return schedule_resp(scp, devip, errsts, pfp, sdebug_jdelay,
5738 sdebug_ndelay);
5739check_cond:
5740 return schedule_resp(scp, devip, check_condition_result, NULL, 0, 0);
5741err_out:
5742 return schedule_resp(scp, NULL, DID_NO_CONNECT << 16, NULL, 0, 0);
5743}
5744
5745static struct scsi_host_template sdebug_driver_template = {
5746 .show_info = scsi_debug_show_info,
5747 .write_info = scsi_debug_write_info,
5748 .proc_name = sdebug_proc_name,
5749 .name = "SCSI DEBUG",
5750 .info = scsi_debug_info,
5751 .slave_alloc = scsi_debug_slave_alloc,
5752 .slave_configure = scsi_debug_slave_configure,
5753 .slave_destroy = scsi_debug_slave_destroy,
5754 .ioctl = scsi_debug_ioctl,
5755 .queuecommand = scsi_debug_queuecommand,
5756 .change_queue_depth = sdebug_change_qdepth,
5757 .eh_abort_handler = scsi_debug_abort,
5758 .eh_device_reset_handler = scsi_debug_device_reset,
5759 .eh_target_reset_handler = scsi_debug_target_reset,
5760 .eh_bus_reset_handler = scsi_debug_bus_reset,
5761 .eh_host_reset_handler = scsi_debug_host_reset,
5762 .can_queue = SDEBUG_CANQUEUE,
5763 .this_id = 7,
5764 .sg_tablesize = SG_MAX_SEGMENTS,
5765 .cmd_per_lun = DEF_CMD_PER_LUN,
5766 .max_sectors = -1U,
5767 .max_segment_size = -1U,
5768 .module = THIS_MODULE,
5769 .track_queue_depth = 1,
5770};
5771
5772static int sdebug_driver_probe(struct device *dev)
5773{
5774 int error = 0;
5775 struct sdebug_host_info *sdbg_host;
5776 struct Scsi_Host *hpnt;
5777 int hprot;
5778
5779 sdbg_host = to_sdebug_host(dev);
5780
5781 sdebug_driver_template.can_queue = sdebug_max_queue;
5782 if (!sdebug_clustering)
5783 sdebug_driver_template.dma_boundary = PAGE_SIZE - 1;
5784
5785 hpnt = scsi_host_alloc(&sdebug_driver_template, sizeof(sdbg_host));
5786 if (NULL == hpnt) {
5787 pr_err("scsi_host_alloc failed\n");
5788 error = -ENODEV;
5789 return error;
5790 }
5791 if (submit_queues > nr_cpu_ids) {
5792 pr_warn("%s: trim submit_queues (was %d) to nr_cpu_ids=%u\n",
5793 my_name, submit_queues, nr_cpu_ids);
5794 submit_queues = nr_cpu_ids;
5795 }
5796 /* Decide whether to tell scsi subsystem that we want mq */
5797 /* Following should give the same answer for each host */
5798 hpnt->nr_hw_queues = submit_queues;
5799
5800 sdbg_host->shost = hpnt;
5801 *((struct sdebug_host_info **)hpnt->hostdata) = sdbg_host;
5802 if ((hpnt->this_id >= 0) && (sdebug_num_tgts > hpnt->this_id))
5803 hpnt->max_id = sdebug_num_tgts + 1;
5804 else
5805 hpnt->max_id = sdebug_num_tgts;
5806 /* = sdebug_max_luns; */
5807 hpnt->max_lun = SCSI_W_LUN_REPORT_LUNS + 1;
5808
5809 hprot = 0;
5810
5811 switch (sdebug_dif) {
5812
5813 case T10_PI_TYPE1_PROTECTION:
5814 hprot = SHOST_DIF_TYPE1_PROTECTION;
5815 if (sdebug_dix)
5816 hprot |= SHOST_DIX_TYPE1_PROTECTION;
5817 break;
5818
5819 case T10_PI_TYPE2_PROTECTION:
5820 hprot = SHOST_DIF_TYPE2_PROTECTION;
5821 if (sdebug_dix)
5822 hprot |= SHOST_DIX_TYPE2_PROTECTION;
5823 break;
5824
5825 case T10_PI_TYPE3_PROTECTION:
5826 hprot = SHOST_DIF_TYPE3_PROTECTION;
5827 if (sdebug_dix)
5828 hprot |= SHOST_DIX_TYPE3_PROTECTION;
5829 break;
5830
5831 default:
5832 if (sdebug_dix)
5833 hprot |= SHOST_DIX_TYPE0_PROTECTION;
5834 break;
5835 }
5836
5837 scsi_host_set_prot(hpnt, hprot);
5838
5839 if (have_dif_prot || sdebug_dix)
5840 pr_info("host protection%s%s%s%s%s%s%s\n",
5841 (hprot & SHOST_DIF_TYPE1_PROTECTION) ? " DIF1" : "",
5842 (hprot & SHOST_DIF_TYPE2_PROTECTION) ? " DIF2" : "",
5843 (hprot & SHOST_DIF_TYPE3_PROTECTION) ? " DIF3" : "",
5844 (hprot & SHOST_DIX_TYPE0_PROTECTION) ? " DIX0" : "",
5845 (hprot & SHOST_DIX_TYPE1_PROTECTION) ? " DIX1" : "",
5846 (hprot & SHOST_DIX_TYPE2_PROTECTION) ? " DIX2" : "",
5847 (hprot & SHOST_DIX_TYPE3_PROTECTION) ? " DIX3" : "");
5848
5849 if (sdebug_guard == 1)
5850 scsi_host_set_guard(hpnt, SHOST_DIX_GUARD_IP);
5851 else
5852 scsi_host_set_guard(hpnt, SHOST_DIX_GUARD_CRC);
5853
5854 sdebug_verbose = !!(SDEBUG_OPT_NOISE & sdebug_opts);
5855 sdebug_any_injecting_opt = !!(SDEBUG_OPT_ALL_INJECTING & sdebug_opts);
5856 if (sdebug_every_nth) /* need stats counters for every_nth */
5857 sdebug_statistics = true;
5858 error = scsi_add_host(hpnt, &sdbg_host->dev);
5859 if (error) {
5860 pr_err("scsi_add_host failed\n");
5861 error = -ENODEV;
5862 scsi_host_put(hpnt);
5863 } else
5864 scsi_scan_host(hpnt);
5865
5866 return error;
5867}
5868
5869static int sdebug_driver_remove(struct device *dev)
5870{
5871 struct sdebug_host_info *sdbg_host;
5872 struct sdebug_dev_info *sdbg_devinfo, *tmp;
5873
5874 sdbg_host = to_sdebug_host(dev);
5875
5876 if (!sdbg_host) {
5877 pr_err("Unable to locate host info\n");
5878 return -ENODEV;
5879 }
5880
5881 scsi_remove_host(sdbg_host->shost);
5882
5883 list_for_each_entry_safe(sdbg_devinfo, tmp, &sdbg_host->dev_info_list,
5884 dev_list) {
5885 list_del(&sdbg_devinfo->dev_list);
5886 kfree(sdbg_devinfo);
5887 }
5888
5889 scsi_host_put(sdbg_host->shost);
5890 return 0;
5891}
5892
5893static int pseudo_lld_bus_match(struct device *dev,
5894 struct device_driver *dev_driver)
5895{
5896 return 1;
5897}
5898
5899static struct bus_type pseudo_lld_bus = {
5900 .name = "pseudo",
5901 .match = pseudo_lld_bus_match,
5902 .probe = sdebug_driver_probe,
5903 .remove = sdebug_driver_remove,
5904 .drv_groups = sdebug_drv_groups,
5905};