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Linux 4.18.10
[linux/fpc-iii.git] / drivers / scsi / scsi_debug.c
blob364e71861bfd5c2c17caf1e93cdeae669e95b971
1 /*
2 * vvvvvvvvvvvvvvvvvvvvvvv Original vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv
3 * Copyright (C) 1992 Eric Youngdale
4 * Simulate a host adapter with 2 disks attached. Do a lot of checking
5 * to make sure that we are not getting blocks mixed up, and PANIC if
6 * anything out of the ordinary is seen.
7 * ^^^^^^^^^^^^^^^^^^^^^^^ Original ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
8 *
9 * Copyright (C) 2001 - 2018 Douglas Gilbert
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2, or (at your option)
14 * any later version.
15 *
16 * For documentation see http://sg.danny.cz/sg/sdebug26.html
17 *
18 */
19
20
21 #define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__
22
23 #include <linux/module.h>
24
25 #include <linux/kernel.h>
26 #include <linux/errno.h>
27 #include <linux/jiffies.h>
28 #include <linux/slab.h>
29 #include <linux/types.h>
30 #include <linux/string.h>
31 #include <linux/genhd.h>
32 #include <linux/fs.h>
33 #include <linux/init.h>
34 #include <linux/proc_fs.h>
35 #include <linux/vmalloc.h>
36 #include <linux/moduleparam.h>
37 #include <linux/scatterlist.h>
38 #include <linux/blkdev.h>
39 #include <linux/crc-t10dif.h>
40 #include <linux/spinlock.h>
41 #include <linux/interrupt.h>
42 #include <linux/atomic.h>
43 #include <linux/hrtimer.h>
44 #include <linux/uuid.h>
45 #include <linux/t10-pi.h>
46
47 #include <net/checksum.h>
48
49 #include <asm/unaligned.h>
50
51 #include <scsi/scsi.h>
52 #include <scsi/scsi_cmnd.h>
53 #include <scsi/scsi_device.h>
54 #include <scsi/scsi_host.h>
55 #include <scsi/scsicam.h>
56 #include <scsi/scsi_eh.h>
57 #include <scsi/scsi_tcq.h>
58 #include <scsi/scsi_dbg.h>
59
60 #include "sd.h"
61 #include "scsi_logging.h"
62
63 /* make sure inq_product_rev string corresponds to this version */
64 #define SDEBUG_VERSION "0188" /* format to fit INQUIRY revision field */
65 static const char *sdebug_version_date = "20180128";
66
67 #define MY_NAME "scsi_debug"
68
69 /* Additional Sense Code (ASC) */
70 #define NO_ADDITIONAL_SENSE 0x0
71 #define LOGICAL_UNIT_NOT_READY 0x4
72 #define LOGICAL_UNIT_COMMUNICATION_FAILURE 0x8
73 #define UNRECOVERED_READ_ERR 0x11
74 #define PARAMETER_LIST_LENGTH_ERR 0x1a
75 #define INVALID_OPCODE 0x20
76 #define LBA_OUT_OF_RANGE 0x21
77 #define INVALID_FIELD_IN_CDB 0x24
78 #define INVALID_FIELD_IN_PARAM_LIST 0x26
79 #define 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
98 /* Additional Sense Code Qualifier (ASCQ) */
99 #define ACK_NAK_TO 0x3
100
101 /* Default values for driver parameters */
102 #define DEF_NUM_HOST 1
103 #define DEF_NUM_TGTS 1
104 #define DEF_MAX_LUNS 1
105 /* With these defaults, this driver will make 1 host with 1 target
106 * (id 0) containing 1 logical unit (lun 0). That is 1 device.
107 */
108 #define DEF_ATO 1
109 #define DEF_CDB_LEN 10
110 #define DEF_JDELAY 1 /* if > 0 unit is a jiffy */
111 #define DEF_DEV_SIZE_MB 8
112 #define DEF_DIF 0
113 #define DEF_DIX 0
114 #define DEF_D_SENSE 0
115 #define DEF_EVERY_NTH 0
116 #define DEF_FAKE_RW 0
117 #define DEF_GUARD 0
118 #define DEF_HOST_LOCK 0
119 #define DEF_LBPU 0
120 #define DEF_LBPWS 0
121 #define DEF_LBPWS10 0
122 #define DEF_LBPRZ 1
123 #define DEF_LOWEST_ALIGNED 0
124 #define DEF_NDELAY 0 /* if > 0 unit is a nanosecond */
125 #define DEF_NO_LUN_0 0
126 #define DEF_NUM_PARTS 0
127 #define DEF_OPTS 0
128 #define DEF_OPT_BLKS 1024
129 #define DEF_PHYSBLK_EXP 0
130 #define DEF_OPT_XFERLEN_EXP 0
131 #define DEF_PTYPE TYPE_DISK
132 #define DEF_REMOVABLE false
133 #define DEF_SCSI_LEVEL 7 /* INQUIRY, byte2 [6->SPC-4; 7->SPC-5] */
134 #define DEF_SECTOR_SIZE 512
135 #define DEF_UNMAP_ALIGNMENT 0
136 #define DEF_UNMAP_GRANULARITY 1
137 #define DEF_UNMAP_MAX_BLOCKS 0xFFFFFFFF
138 #define DEF_UNMAP_MAX_DESC 256
139 #define DEF_VIRTUAL_GB 0
140 #define DEF_VPD_USE_HOSTNO 1
141 #define DEF_WRITESAME_LENGTH 0xFFFF
142 #define DEF_STRICT 0
143 #define DEF_STATISTICS false
144 #define DEF_SUBMIT_QUEUES 1
145 #define DEF_UUID_CTL 0
146 #define JDELAY_OVERRIDDEN -9999
147
148 #define SDEBUG_LUN_0_VAL 0
149
150 /* bit mask values for sdebug_opts */
151 #define SDEBUG_OPT_NOISE 1
152 #define SDEBUG_OPT_MEDIUM_ERR 2
153 #define SDEBUG_OPT_TIMEOUT 4
154 #define SDEBUG_OPT_RECOVERED_ERR 8
155 #define SDEBUG_OPT_TRANSPORT_ERR 16
156 #define SDEBUG_OPT_DIF_ERR 32
157 #define SDEBUG_OPT_DIX_ERR 64
158 #define SDEBUG_OPT_MAC_TIMEOUT 128
159 #define SDEBUG_OPT_SHORT_TRANSFER 0x100
160 #define SDEBUG_OPT_Q_NOISE 0x200
161 #define SDEBUG_OPT_ALL_TSF 0x400
162 #define SDEBUG_OPT_RARE_TSF 0x800
163 #define SDEBUG_OPT_N_WCE 0x1000
164 #define SDEBUG_OPT_RESET_NOISE 0x2000
165 #define SDEBUG_OPT_NO_CDB_NOISE 0x4000
166 #define SDEBUG_OPT_HOST_BUSY 0x8000
167 #define SDEBUG_OPT_ALL_NOISE (SDEBUG_OPT_NOISE | SDEBUG_OPT_Q_NOISE | \
168 SDEBUG_OPT_RESET_NOISE)
169 #define SDEBUG_OPT_ALL_INJECTING (SDEBUG_OPT_RECOVERED_ERR | \
170 SDEBUG_OPT_TRANSPORT_ERR | \
171 SDEBUG_OPT_DIF_ERR | SDEBUG_OPT_DIX_ERR | \
172 SDEBUG_OPT_SHORT_TRANSFER | \
173 SDEBUG_OPT_HOST_BUSY)
174 /* When "every_nth" > 0 then modulo "every_nth" commands:
175 * - a missing response is simulated if SDEBUG_OPT_TIMEOUT is set
176 * - a RECOVERED_ERROR is simulated on successful read and write
177 * commands if SDEBUG_OPT_RECOVERED_ERR is set.
178 * - a TRANSPORT_ERROR is simulated on successful read and write
179 * commands if SDEBUG_OPT_TRANSPORT_ERR is set.
180 *
181 * When "every_nth" < 0 then after "- every_nth" commands:
182 * - a missing response is simulated if SDEBUG_OPT_TIMEOUT is set
183 * - a RECOVERED_ERROR is simulated on successful read and write
184 * commands if SDEBUG_OPT_RECOVERED_ERR is set.
185 * - a TRANSPORT_ERROR is simulated on successful read and write
186 * commands if _DEBUG_OPT_TRANSPORT_ERR is set.
187 * This will continue on every subsequent command until some other action
188 * occurs (e.g. the user * writing a new value (other than -1 or 1) to
189 * every_nth via sysfs).
190 */
191
192 /* As indicated in SAM-5 and SPC-4 Unit Attentions (UAs) are returned in
193 * priority order. In the subset implemented here lower numbers have higher
194 * priority. The UA numbers should be a sequence starting from 0 with
195 * SDEBUG_NUM_UAS being 1 higher than the highest numbered UA. */
196 #define SDEBUG_UA_POR 0 /* Power on, reset, or bus device reset */
197 #define SDEBUG_UA_BUS_RESET 1
198 #define SDEBUG_UA_MODE_CHANGED 2
199 #define SDEBUG_UA_CAPACITY_CHANGED 3
200 #define SDEBUG_UA_LUNS_CHANGED 4
201 #define SDEBUG_UA_MICROCODE_CHANGED 5 /* simulate firmware change */
202 #define SDEBUG_UA_MICROCODE_CHANGED_WO_RESET 6
203 #define SDEBUG_NUM_UAS 7
204
205 /* when 1==SDEBUG_OPT_MEDIUM_ERR, a medium error is simulated at this
206 * sector on read commands: */
207 #define OPT_MEDIUM_ERR_ADDR 0x1234 /* that's sector 4660 in decimal */
208 #define OPT_MEDIUM_ERR_NUM 10 /* number of consecutive medium errs */
209
210 /* If REPORT LUNS has luns >= 256 it can choose "flat space" (value 1)
211 * or "peripheral device" addressing (value 0) */
212 #define SAM2_LUN_ADDRESS_METHOD 0
213
214 /* SDEBUG_CANQUEUE is the maximum number of commands that can be queued
215 * (for response) per submit queue at one time. Can be reduced by max_queue
216 * option. Command responses are not queued when jdelay=0 and ndelay=0. The
217 * per-device DEF_CMD_PER_LUN can be changed via sysfs:
218 * /sys/class/scsi_device/<h:c:t:l>/device/queue_depth
219 * but cannot exceed SDEBUG_CANQUEUE .
220 */
221 #define SDEBUG_CANQUEUE_WORDS 3 /* a WORD is bits in a long */
222 #define SDEBUG_CANQUEUE (SDEBUG_CANQUEUE_WORDS * BITS_PER_LONG)
223 #define DEF_CMD_PER_LUN 255
224
225 #define F_D_IN 1
226 #define F_D_OUT 2
227 #define F_D_OUT_MAYBE 4 /* WRITE SAME, NDOB bit */
228 #define F_D_UNKN 8
229 #define F_RL_WLUN_OK 0x10
230 #define F_SKIP_UA 0x20
231 #define F_DELAY_OVERR 0x40
232 #define F_SA_LOW 0x80 /* cdb byte 1, bits 4 to 0 */
233 #define F_SA_HIGH 0x100 /* as used by variable length cdbs */
234 #define F_INV_OP 0x200
235 #define F_FAKE_RW 0x400
236 #define F_M_ACCESS 0x800 /* media access */
237 #define F_SSU_DELAY 0x1000
238 #define F_SYNC_DELAY 0x2000
239
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
250 struct sdebug_dev_info {
251 struct list_head dev_list;
252 unsigned int channel;
253 unsigned int target;
254 u64 lun;
255 uuid_t lu_name;
256 struct sdebug_host_info *sdbg_host;
257 unsigned long uas_bm[1];
258 atomic_t num_in_q;
259 atomic_t stopped;
260 bool used;
261 };
262
263 struct sdebug_host_info {
264 struct list_head host_list;
265 struct Scsi_Host *shost;
266 struct device dev;
267 struct list_head dev_info_list;
268 };
269
270 #define to_sdebug_host(d) \
271 container_of(d, struct sdebug_host_info, dev)
272
273 enum sdeb_defer_type {SDEB_DEFER_NONE = 0, SDEB_DEFER_HRT = 1,
274 SDEB_DEFER_WQ = 2};
275
276 struct sdebug_defer {
277 struct hrtimer hrt;
278 struct execute_work ew;
279 int sqa_idx; /* index of sdebug_queue array */
280 int qc_idx; /* index of sdebug_queued_cmd array within sqa_idx */
281 int issuing_cpu;
282 bool init_hrt;
283 bool init_wq;
284 enum sdeb_defer_type defer_t;
285 };
286
287 struct sdebug_queued_cmd {
288 /* corresponding bit set in in_use_bm[] in owning struct sdebug_queue
289 * instance indicates this slot is in use.
290 */
291 struct sdebug_defer *sd_dp;
292 struct scsi_cmnd *a_cmnd;
293 unsigned int inj_recovered:1;
294 unsigned int inj_transport:1;
295 unsigned int inj_dif:1;
296 unsigned int inj_dix:1;
297 unsigned int inj_short:1;
298 unsigned int inj_host_busy:1;
299 };
300
301 struct sdebug_queue {
302 struct sdebug_queued_cmd qc_arr[SDEBUG_CANQUEUE];
303 unsigned long in_use_bm[SDEBUG_CANQUEUE_WORDS];
304 spinlock_t qc_lock;
305 atomic_t blocked; /* to temporarily stop more being queued */
306 };
307
308 static atomic_t sdebug_cmnd_count; /* number of incoming commands */
309 static atomic_t sdebug_completions; /* count of deferred completions */
310 static atomic_t sdebug_miss_cpus; /* submission + completion cpus differ */
311 static atomic_t sdebug_a_tsf; /* 'almost task set full' counter */
312
313 struct opcode_info_t {
314 u8 num_attached; /* 0 if this is it (i.e. a leaf); use 0xff */
315 /* for terminating element */
316 u8 opcode; /* if num_attached > 0, preferred */
317 u16 sa; /* service action */
318 u32 flags; /* OR-ed set of SDEB_F_* */
319 int (*pfp)(struct scsi_cmnd *, struct sdebug_dev_info *);
320 const struct opcode_info_t *arrp; /* num_attached elements or NULL */
321 u8 len_mask[16]; /* len_mask[0]-->cdb_len, then mask for cdb */
322 /* 1 to min(cdb_len, 15); ignore cdb[15...] */
323 };
324
325 /* SCSI opcodes (first byte of cdb) of interest mapped onto these indexes */
326 enum sdeb_opcode_index {
327 SDEB_I_INVALID_OPCODE = 0,
328 SDEB_I_INQUIRY = 1,
329 SDEB_I_REPORT_LUNS = 2,
330 SDEB_I_REQUEST_SENSE = 3,
331 SDEB_I_TEST_UNIT_READY = 4,
332 SDEB_I_MODE_SENSE = 5, /* 6, 10 */
333 SDEB_I_MODE_SELECT = 6, /* 6, 10 */
334 SDEB_I_LOG_SENSE = 7,
335 SDEB_I_READ_CAPACITY = 8, /* 10; 16 is in SA_IN(16) */
336 SDEB_I_READ = 9, /* 6, 10, 12, 16 */
337 SDEB_I_WRITE = 10, /* 6, 10, 12, 16 */
338 SDEB_I_START_STOP = 11,
339 SDEB_I_SERV_ACT_IN_16 = 12, /* add ...SERV_ACT_IN_12 if needed */
340 SDEB_I_SERV_ACT_OUT_16 = 13, /* add ...SERV_ACT_OUT_12 if needed */
341 SDEB_I_MAINT_IN = 14,
342 SDEB_I_MAINT_OUT = 15,
343 SDEB_I_VERIFY = 16, /* 10 only */
344 SDEB_I_VARIABLE_LEN = 17, /* READ(32), WRITE(32), WR_SCAT(32) */
345 SDEB_I_RESERVE = 18, /* 6, 10 */
346 SDEB_I_RELEASE = 19, /* 6, 10 */
347 SDEB_I_ALLOW_REMOVAL = 20, /* PREVENT ALLOW MEDIUM REMOVAL */
348 SDEB_I_REZERO_UNIT = 21, /* REWIND in SSC */
349 SDEB_I_ATA_PT = 22, /* 12, 16 */
350 SDEB_I_SEND_DIAG = 23,
351 SDEB_I_UNMAP = 24,
352 SDEB_I_XDWRITEREAD = 25, /* 10 only */
353 SDEB_I_WRITE_BUFFER = 26,
354 SDEB_I_WRITE_SAME = 27, /* 10, 16 */
355 SDEB_I_SYNC_CACHE = 28, /* 10, 16 */
356 SDEB_I_COMP_WRITE = 29,
357 SDEB_I_LAST_ELEMENT = 30, /* keep this last (previous + 1) */
358 };
359
360
361 static const unsigned char opcode_ind_arr[256] = {
362 /* 0x0; 0x0->0x1f: 6 byte cdbs */
363 SDEB_I_TEST_UNIT_READY, SDEB_I_REZERO_UNIT, 0, SDEB_I_REQUEST_SENSE,
364 0, 0, 0, 0,
365 SDEB_I_READ, 0, SDEB_I_WRITE, 0, 0, 0, 0, 0,
366 0, 0, SDEB_I_INQUIRY, 0, 0, SDEB_I_MODE_SELECT, SDEB_I_RESERVE,
367 SDEB_I_RELEASE,
368 0, 0, SDEB_I_MODE_SENSE, SDEB_I_START_STOP, 0, SDEB_I_SEND_DIAG,
369 SDEB_I_ALLOW_REMOVAL, 0,
370 /* 0x20; 0x20->0x3f: 10 byte cdbs */
371 0, 0, 0, 0, 0, SDEB_I_READ_CAPACITY, 0, 0,
372 SDEB_I_READ, 0, SDEB_I_WRITE, 0, 0, 0, 0, SDEB_I_VERIFY,
373 0, 0, 0, 0, 0, SDEB_I_SYNC_CACHE, 0, 0,
374 0, 0, 0, SDEB_I_WRITE_BUFFER, 0, 0, 0, 0,
375 /* 0x40; 0x40->0x5f: 10 byte cdbs */
376 0, SDEB_I_WRITE_SAME, SDEB_I_UNMAP, 0, 0, 0, 0, 0,
377 0, 0, 0, 0, 0, SDEB_I_LOG_SENSE, 0, 0,
378 0, 0, 0, SDEB_I_XDWRITEREAD, 0, SDEB_I_MODE_SELECT, SDEB_I_RESERVE,
379 SDEB_I_RELEASE,
380 0, 0, SDEB_I_MODE_SENSE, 0, 0, 0, 0, 0,
381 /* 0x60; 0x60->0x7d are reserved, 0x7e is "extended cdb" */
382 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
383 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
384 0, SDEB_I_VARIABLE_LEN,
385 /* 0x80; 0x80->0x9f: 16 byte cdbs */
386 0, 0, 0, 0, 0, SDEB_I_ATA_PT, 0, 0,
387 SDEB_I_READ, SDEB_I_COMP_WRITE, SDEB_I_WRITE, 0, 0, 0, 0, 0,
388 0, SDEB_I_SYNC_CACHE, 0, SDEB_I_WRITE_SAME, 0, 0, 0, 0,
389 0, 0, 0, 0, 0, 0, SDEB_I_SERV_ACT_IN_16, SDEB_I_SERV_ACT_OUT_16,
390 /* 0xa0; 0xa0->0xbf: 12 byte cdbs */
391 SDEB_I_REPORT_LUNS, SDEB_I_ATA_PT, 0, SDEB_I_MAINT_IN,
392 SDEB_I_MAINT_OUT, 0, 0, 0,
393 SDEB_I_READ, 0 /* SDEB_I_SERV_ACT_OUT_12 */, SDEB_I_WRITE,
394 0 /* SDEB_I_SERV_ACT_IN_12 */, 0, 0, 0, 0,
395 0, 0, 0, 0, 0, 0, 0, 0,
396 0, 0, 0, 0, 0, 0, 0, 0,
397 /* 0xc0; 0xc0->0xff: vendor specific */
398 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
399 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
400 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
401 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
402 };
403
404 /*
405 * The following "response" functions return the SCSI mid-level's 4 byte
406 * tuple-in-an-int. To handle commands with an IMMED bit, for a faster
407 * command completion, they can mask their return value with
408 * SDEG_RES_IMMED_MASK .
409 */
410 #define SDEG_RES_IMMED_MASK 0x40000000
411
412 static int resp_inquiry(struct scsi_cmnd *, struct sdebug_dev_info *);
413 static int resp_report_luns(struct scsi_cmnd *, struct sdebug_dev_info *);
414 static int resp_requests(struct scsi_cmnd *, struct sdebug_dev_info *);
415 static int resp_mode_sense(struct scsi_cmnd *, struct sdebug_dev_info *);
416 static int resp_mode_select(struct scsi_cmnd *, struct sdebug_dev_info *);
417 static int resp_log_sense(struct scsi_cmnd *, struct sdebug_dev_info *);
418 static int resp_readcap(struct scsi_cmnd *, struct sdebug_dev_info *);
419 static int resp_read_dt0(struct scsi_cmnd *, struct sdebug_dev_info *);
420 static int resp_write_dt0(struct scsi_cmnd *, struct sdebug_dev_info *);
421 static int resp_write_scat(struct scsi_cmnd *, struct sdebug_dev_info *);
422 static int resp_start_stop(struct scsi_cmnd *, struct sdebug_dev_info *);
423 static int resp_readcap16(struct scsi_cmnd *, struct sdebug_dev_info *);
424 static int resp_get_lba_status(struct scsi_cmnd *, struct sdebug_dev_info *);
425 static int resp_report_tgtpgs(struct scsi_cmnd *, struct sdebug_dev_info *);
426 static int resp_unmap(struct scsi_cmnd *, struct sdebug_dev_info *);
427 static int resp_rsup_opcodes(struct scsi_cmnd *, struct sdebug_dev_info *);
428 static int resp_rsup_tmfs(struct scsi_cmnd *, struct sdebug_dev_info *);
429 static int resp_write_same_10(struct scsi_cmnd *, struct sdebug_dev_info *);
430 static int resp_write_same_16(struct scsi_cmnd *, struct sdebug_dev_info *);
431 static int resp_xdwriteread_10(struct scsi_cmnd *, struct sdebug_dev_info *);
432 static int resp_comp_write(struct scsi_cmnd *, struct sdebug_dev_info *);
433 static int resp_write_buffer(struct scsi_cmnd *, struct sdebug_dev_info *);
434 static int resp_sync_cache(struct scsi_cmnd *, struct sdebug_dev_info *);
435
436 /*
437 * The following are overflow arrays for cdbs that "hit" the same index in
438 * the opcode_info_arr array. The most time sensitive (or commonly used) cdb
439 * should be placed in opcode_info_arr[], the others should be placed here.
440 */
441 static const struct opcode_info_t msense_iarr[] = {
442 {0, 0x1a, 0, F_D_IN, NULL, NULL,
443 {6, 0xe8, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
444 };
445
446 static const struct opcode_info_t mselect_iarr[] = {
447 {0, 0x15, 0, F_D_OUT, NULL, NULL,
448 {6, 0xf1, 0, 0, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
449 };
450
451 static const struct opcode_info_t read_iarr[] = {
452 {0, 0x28, 0, F_D_IN | FF_MEDIA_IO, resp_read_dt0, NULL,/* READ(10) */
453 {10, 0xff, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xff, 0xff, 0xc7, 0, 0,
454 0, 0, 0, 0} },
455 {0, 0x8, 0, F_D_IN | FF_MEDIA_IO, resp_read_dt0, NULL, /* READ(6) */
456 {6, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
457 {0, 0xa8, 0, F_D_IN | FF_MEDIA_IO, resp_read_dt0, NULL,/* READ(12) */
458 {12, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xbf,
459 0xc7, 0, 0, 0, 0} },
460 };
461
462 static const struct opcode_info_t write_iarr[] = {
463 {0, 0x2a, 0, F_D_OUT | FF_MEDIA_IO, resp_write_dt0, /* WRITE(10) */
464 NULL, {10, 0xfb, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xff, 0xff, 0xc7,
465 0, 0, 0, 0, 0, 0} },
466 {0, 0xa, 0, F_D_OUT | FF_MEDIA_IO, resp_write_dt0, /* WRITE(6) */
467 NULL, {6, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0,
468 0, 0, 0} },
469 {0, 0xaa, 0, F_D_OUT | FF_MEDIA_IO, resp_write_dt0, /* WRITE(12) */
470 NULL, {12, 0xfb, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
471 0xbf, 0xc7, 0, 0, 0, 0} },
472 };
473
474 static const struct opcode_info_t sa_in_16_iarr[] = {
475 {0, 0x9e, 0x12, F_SA_LOW | F_D_IN, resp_get_lba_status, NULL,
476 {16, 0x12, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
477 0xff, 0xff, 0xff, 0, 0xc7} }, /* GET LBA STATUS(16) */
478 };
479
480 static const struct opcode_info_t vl_iarr[] = { /* VARIABLE LENGTH */
481 {0, 0x7f, 0xb, F_SA_HIGH | F_D_OUT | FF_MEDIA_IO, resp_write_dt0,
482 NULL, {32, 0xc7, 0, 0, 0, 0, 0x3f, 0x18, 0x0, 0xb, 0xfa,
483 0, 0xff, 0xff, 0xff, 0xff} }, /* WRITE(32) */
484 {0, 0x7f, 0x11, F_SA_HIGH | F_D_OUT | FF_MEDIA_IO, resp_write_scat,
485 NULL, {32, 0xc7, 0, 0, 0, 0, 0x3f, 0x18, 0x0, 0x11, 0xf8,
486 0, 0xff, 0xff, 0x0, 0x0} }, /* WRITE SCATTERED(32) */
487 };
488
489 static const struct opcode_info_t maint_in_iarr[] = { /* MAINT IN */
490 {0, 0xa3, 0xc, F_SA_LOW | F_D_IN, resp_rsup_opcodes, NULL,
491 {12, 0xc, 0x87, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0,
492 0xc7, 0, 0, 0, 0} }, /* REPORT SUPPORTED OPERATION CODES */
493 {0, 0xa3, 0xd, F_SA_LOW | F_D_IN, resp_rsup_tmfs, NULL,
494 {12, 0xd, 0x80, 0, 0, 0, 0xff, 0xff, 0xff, 0xff, 0, 0xc7, 0, 0,
495 0, 0} }, /* REPORTED SUPPORTED TASK MANAGEMENT FUNCTIONS */
496 };
497
498 static const struct opcode_info_t write_same_iarr[] = {
499 {0, 0x93, 0, F_D_OUT_MAYBE | FF_MEDIA_IO, resp_write_same_16, NULL,
500 {16, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
501 0xff, 0xff, 0xff, 0x3f, 0xc7} }, /* WRITE SAME(16) */
502 };
503
504 static const struct opcode_info_t reserve_iarr[] = {
505 {0, 0x16, 0, F_D_OUT, NULL, NULL, /* RESERVE(6) */
506 {6, 0x1f, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
507 };
508
509 static const struct opcode_info_t release_iarr[] = {
510 {0, 0x17, 0, F_D_OUT, NULL, NULL, /* RELEASE(6) */
511 {6, 0x1f, 0xff, 0, 0, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
512 };
513
514 static const struct opcode_info_t sync_cache_iarr[] = {
515 {0, 0x91, 0, F_SYNC_DELAY | F_M_ACCESS, resp_sync_cache, NULL,
516 {16, 0x6, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
517 0xff, 0xff, 0xff, 0xff, 0x3f, 0xc7} }, /* SYNC_CACHE (16) */
518 };
519
520
521 /* This array is accessed via SDEB_I_* values. Make sure all are mapped,
522 * plus the terminating elements for logic that scans this table such as
523 * REPORT SUPPORTED OPERATION CODES. */
524 static const struct opcode_info_t opcode_info_arr[SDEB_I_LAST_ELEMENT + 1] = {
525 /* 0 */
526 {0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL, /* unknown opcodes */
527 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
528 {0, 0x12, 0, FF_RESPOND | F_D_IN, resp_inquiry, NULL, /* INQUIRY */
529 {6, 0xe3, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
530 {0, 0xa0, 0, FF_RESPOND | F_D_IN, resp_report_luns, NULL,
531 {12, 0xe3, 0xff, 0, 0, 0, 0xff, 0xff, 0xff, 0xff, 0, 0xc7, 0, 0,
532 0, 0} }, /* REPORT LUNS */
533 {0, 0x3, 0, FF_RESPOND | F_D_IN, resp_requests, NULL,
534 {6, 0xe1, 0, 0, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
535 {0, 0x0, 0, F_M_ACCESS | F_RL_WLUN_OK, NULL, NULL,/* TEST UNIT READY */
536 {6, 0, 0, 0, 0, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
537 /* 5 */
538 {ARRAY_SIZE(msense_iarr), 0x5a, 0, F_D_IN, /* MODE SENSE(10) */
539 resp_mode_sense, msense_iarr, {10, 0xf8, 0xff, 0xff, 0, 0, 0,
540 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0} },
541 {ARRAY_SIZE(mselect_iarr), 0x55, 0, F_D_OUT, /* MODE SELECT(10) */
542 resp_mode_select, mselect_iarr, {10, 0xf1, 0, 0, 0, 0, 0, 0xff,
543 0xff, 0xc7, 0, 0, 0, 0, 0, 0} },
544 {0, 0x4d, 0, F_D_IN, resp_log_sense, NULL, /* LOG SENSE */
545 {10, 0xe3, 0xff, 0xff, 0, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0,
546 0, 0, 0} },
547 {0, 0x25, 0, F_D_IN, resp_readcap, NULL, /* READ CAPACITY(10) */
548 {10, 0xe1, 0xff, 0xff, 0xff, 0xff, 0, 0, 0x1, 0xc7, 0, 0, 0, 0,
549 0, 0} },
550 {ARRAY_SIZE(read_iarr), 0x88, 0, F_D_IN | FF_MEDIA_IO, /* READ(16) */
551 resp_read_dt0, read_iarr, {16, 0xfe, 0xff, 0xff, 0xff, 0xff,
552 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc7} },
553 /* 10 */
554 {ARRAY_SIZE(write_iarr), 0x8a, 0, F_D_OUT | FF_MEDIA_IO,
555 resp_write_dt0, write_iarr, /* WRITE(16) */
556 {16, 0xfa, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
557 0xff, 0xff, 0xff, 0xff, 0xff, 0xc7} },
558 {0, 0x1b, 0, F_SSU_DELAY, resp_start_stop, NULL,/* START STOP UNIT */
559 {6, 0x1, 0, 0xf, 0xf7, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
560 {ARRAY_SIZE(sa_in_16_iarr), 0x9e, 0x10, F_SA_LOW | F_D_IN,
561 resp_readcap16, sa_in_16_iarr, /* SA_IN(16), READ CAPACITY(16) */
562 {16, 0x10, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
563 0xff, 0xff, 0xff, 0xff, 0x1, 0xc7} },
564 {0, 0x9f, 0x12, F_SA_LOW | F_D_OUT | FF_MEDIA_IO, resp_write_scat,
565 NULL, {16, 0x12, 0xf9, 0x0, 0xff, 0xff, 0, 0, 0xff, 0xff, 0xff,
566 0xff, 0xff, 0xff, 0xff, 0xc7} }, /* SA_OUT(16), WRITE SCAT(16) */
567 {ARRAY_SIZE(maint_in_iarr), 0xa3, 0xa, F_SA_LOW | F_D_IN,
568 resp_report_tgtpgs, /* MAINT IN, REPORT TARGET PORT GROUPS */
569 maint_in_iarr, {12, 0xea, 0, 0, 0, 0, 0xff, 0xff, 0xff,
570 0xff, 0, 0xc7, 0, 0, 0, 0} },
571 /* 15 */
572 {0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL, /* MAINT OUT */
573 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
574 {0, 0x2f, 0, F_D_OUT_MAYBE | FF_MEDIA_IO, NULL, NULL, /* VERIFY(10) */
575 {10, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc7,
576 0, 0, 0, 0, 0, 0} },
577 {ARRAY_SIZE(vl_iarr), 0x7f, 0x9, F_SA_HIGH | F_D_IN | FF_MEDIA_IO,
578 resp_read_dt0, vl_iarr, /* VARIABLE LENGTH, READ(32) */
579 {32, 0xc7, 0, 0, 0, 0, 0x3f, 0x18, 0x0, 0x9, 0xfe, 0, 0xff, 0xff,
580 0xff, 0xff} },
581 {ARRAY_SIZE(reserve_iarr), 0x56, 0, F_D_OUT,
582 NULL, reserve_iarr, /* RESERVE(10) <no response function> */
583 {10, 0xff, 0xff, 0xff, 0, 0, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0,
584 0} },
585 {ARRAY_SIZE(release_iarr), 0x57, 0, F_D_OUT,
586 NULL, release_iarr, /* RELEASE(10) <no response function> */
587 {10, 0x13, 0xff, 0xff, 0, 0, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0,
588 0} },
589 /* 20 */
590 {0, 0x1e, 0, 0, NULL, NULL, /* ALLOW REMOVAL */
591 {6, 0, 0, 0, 0x3, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
592 {0, 0x1, 0, 0, resp_start_stop, NULL, /* REWIND ?? */
593 {6, 0x1, 0, 0, 0, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
594 {0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL, /* ATA_PT */
595 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
596 {0, 0x1d, F_D_OUT, 0, NULL, NULL, /* SEND DIAGNOSTIC */
597 {6, 0xf7, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
598 {0, 0x42, 0, F_D_OUT | FF_MEDIA_IO, resp_unmap, NULL, /* UNMAP */
599 {10, 0x1, 0, 0, 0, 0, 0x3f, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0} },
600 /* 25 */
601 {0, 0x53, 0, F_D_IN | F_D_OUT | FF_MEDIA_IO, resp_xdwriteread_10,
602 NULL, {10, 0xff, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xff, 0xff, 0xc7,
603 0, 0, 0, 0, 0, 0} }, /* XDWRITEREAD(10) */
604 {0, 0x3b, 0, F_D_OUT_MAYBE, resp_write_buffer, NULL,
605 {10, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0,
606 0, 0, 0, 0} }, /* WRITE_BUFFER */
607 {ARRAY_SIZE(write_same_iarr), 0x41, 0, F_D_OUT_MAYBE | FF_MEDIA_IO,
608 resp_write_same_10, write_same_iarr, /* WRITE SAME(10) */
609 {10, 0xff, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xff, 0xff, 0xc7, 0,
610 0, 0, 0, 0, 0} },
611 {ARRAY_SIZE(sync_cache_iarr), 0x35, 0, F_SYNC_DELAY | F_M_ACCESS,
612 resp_sync_cache, sync_cache_iarr,
613 {10, 0x7, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xff, 0xff, 0xc7, 0, 0,
614 0, 0, 0, 0} }, /* SYNC_CACHE (10) */
615 {0, 0x89, 0, F_D_OUT | FF_MEDIA_IO, resp_comp_write, NULL,
616 {16, 0xf8, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0, 0,
617 0, 0xff, 0x3f, 0xc7} }, /* COMPARE AND WRITE */
618
619 /* 30 */
620 {0xff, 0, 0, 0, NULL, NULL, /* terminating element */
621 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
622 };
623
624 static int sdebug_add_host = DEF_NUM_HOST;
625 static int sdebug_ato = DEF_ATO;
626 static int sdebug_cdb_len = DEF_CDB_LEN;
627 static int sdebug_jdelay = DEF_JDELAY; /* if > 0 then unit is jiffies */
628 static int sdebug_dev_size_mb = DEF_DEV_SIZE_MB;
629 static int sdebug_dif = DEF_DIF;
630 static int sdebug_dix = DEF_DIX;
631 static int sdebug_dsense = DEF_D_SENSE;
632 static int sdebug_every_nth = DEF_EVERY_NTH;
633 static int sdebug_fake_rw = DEF_FAKE_RW;
634 static unsigned int sdebug_guard = DEF_GUARD;
635 static int sdebug_lowest_aligned = DEF_LOWEST_ALIGNED;
636 static int sdebug_max_luns = DEF_MAX_LUNS;
637 static int sdebug_max_queue = SDEBUG_CANQUEUE; /* per submit queue */
638 static unsigned int sdebug_medium_error_start = OPT_MEDIUM_ERR_ADDR;
639 static int sdebug_medium_error_count = OPT_MEDIUM_ERR_NUM;
640 static atomic_t retired_max_queue; /* if > 0 then was prior max_queue */
641 static int sdebug_ndelay = DEF_NDELAY; /* if > 0 then unit is nanoseconds */
642 static int sdebug_no_lun_0 = DEF_NO_LUN_0;
643 static int sdebug_no_uld;
644 static int sdebug_num_parts = DEF_NUM_PARTS;
645 static int sdebug_num_tgts = DEF_NUM_TGTS; /* targets per host */
646 static int sdebug_opt_blks = DEF_OPT_BLKS;
647 static int sdebug_opts = DEF_OPTS;
648 static int sdebug_physblk_exp = DEF_PHYSBLK_EXP;
649 static int sdebug_opt_xferlen_exp = DEF_OPT_XFERLEN_EXP;
650 static int sdebug_ptype = DEF_PTYPE; /* SCSI peripheral device type */
651 static int sdebug_scsi_level = DEF_SCSI_LEVEL;
652 static int sdebug_sector_size = DEF_SECTOR_SIZE;
653 static int sdebug_virtual_gb = DEF_VIRTUAL_GB;
654 static int sdebug_vpd_use_hostno = DEF_VPD_USE_HOSTNO;
655 static unsigned int sdebug_lbpu = DEF_LBPU;
656 static unsigned int sdebug_lbpws = DEF_LBPWS;
657 static unsigned int sdebug_lbpws10 = DEF_LBPWS10;
658 static unsigned int sdebug_lbprz = DEF_LBPRZ;
659 static unsigned int sdebug_unmap_alignment = DEF_UNMAP_ALIGNMENT;
660 static unsigned int sdebug_unmap_granularity = DEF_UNMAP_GRANULARITY;
661 static unsigned int sdebug_unmap_max_blocks = DEF_UNMAP_MAX_BLOCKS;
662 static unsigned int sdebug_unmap_max_desc = DEF_UNMAP_MAX_DESC;
663 static unsigned int sdebug_write_same_length = DEF_WRITESAME_LENGTH;
664 static int sdebug_uuid_ctl = DEF_UUID_CTL;
665 static bool sdebug_removable = DEF_REMOVABLE;
666 static bool sdebug_clustering;
667 static bool sdebug_host_lock = DEF_HOST_LOCK;
668 static bool sdebug_strict = DEF_STRICT;
669 static bool sdebug_any_injecting_opt;
670 static bool sdebug_verbose;
671 static bool have_dif_prot;
672 static bool write_since_sync;
673 static bool sdebug_statistics = DEF_STATISTICS;
674
675 static unsigned int sdebug_store_sectors;
676 static sector_t sdebug_capacity; /* in sectors */
677
678 /* old BIOS stuff, kernel may get rid of them but some mode sense pages
679 may still need them */
680 static int sdebug_heads; /* heads per disk */
681 static int sdebug_cylinders_per; /* cylinders per surface */
682 static int sdebug_sectors_per; /* sectors per cylinder */
683
684 static LIST_HEAD(sdebug_host_list);
685 static DEFINE_SPINLOCK(sdebug_host_list_lock);
686
687 static unsigned char *fake_storep; /* ramdisk storage */
688 static struct t10_pi_tuple *dif_storep; /* protection info */
689 static void *map_storep; /* provisioning map */
690
691 static unsigned long map_size;
692 static int num_aborts;
693 static int num_dev_resets;
694 static int num_target_resets;
695 static int num_bus_resets;
696 static int num_host_resets;
697 static int dix_writes;
698 static int dix_reads;
699 static int dif_errors;
700
701 static int submit_queues = DEF_SUBMIT_QUEUES; /* > 1 for multi-queue (mq) */
702 static struct sdebug_queue *sdebug_q_arr; /* ptr to array of submit queues */
703
704 static DEFINE_RWLOCK(atomic_rw);
705
706 static char sdebug_proc_name[] = MY_NAME;
707 static const char *my_name = MY_NAME;
708
709 static struct bus_type pseudo_lld_bus;
710
711 static struct device_driver sdebug_driverfs_driver = {
712 .name = sdebug_proc_name,
713 .bus = &pseudo_lld_bus,
714 };
715
716 static const int check_condition_result =
717 (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
718
719 static const int illegal_condition_result =
720 (DRIVER_SENSE << 24) | (DID_ABORT << 16) | SAM_STAT_CHECK_CONDITION;
721
722 static const int device_qfull_result =
723 (DID_OK << 16) | (COMMAND_COMPLETE << 8) | SAM_STAT_TASK_SET_FULL;
724
725
726 /* Only do the extra work involved in logical block provisioning if one or
727 * more of the lbpu, lbpws or lbpws10 parameters are given and we are doing
728 * real reads and writes (i.e. not skipping them for speed).
729 */
730 static inline bool scsi_debug_lbp(void)
731 {
732 return 0 == sdebug_fake_rw &&
733 (sdebug_lbpu || sdebug_lbpws || sdebug_lbpws10);
734 }
735
736 static void *fake_store(unsigned long long lba)
737 {
738 lba = do_div(lba, sdebug_store_sectors);
739
740 return fake_storep + lba * sdebug_sector_size;
741 }
742
743 static struct t10_pi_tuple *dif_store(sector_t sector)
744 {
745 sector = sector_div(sector, sdebug_store_sectors);
746
747 return dif_storep + sector;
748 }
749
750 static void sdebug_max_tgts_luns(void)
751 {
752 struct sdebug_host_info *sdbg_host;
753 struct Scsi_Host *hpnt;
754
755 spin_lock(&sdebug_host_list_lock);
756 list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) {
757 hpnt = sdbg_host->shost;
758 if ((hpnt->this_id >= 0) &&
759 (sdebug_num_tgts > hpnt->this_id))
760 hpnt->max_id = sdebug_num_tgts + 1;
761 else
762 hpnt->max_id = sdebug_num_tgts;
763 /* sdebug_max_luns; */
764 hpnt->max_lun = SCSI_W_LUN_REPORT_LUNS + 1;
765 }
766 spin_unlock(&sdebug_host_list_lock);
767 }
768
769 enum sdeb_cmd_data {SDEB_IN_DATA = 0, SDEB_IN_CDB = 1};
770
771 /* Set in_bit to -1 to indicate no bit position of invalid field */
772 static void mk_sense_invalid_fld(struct scsi_cmnd *scp,
773 enum sdeb_cmd_data c_d,
774 int in_byte, int in_bit)
775 {
776 unsigned char *sbuff;
777 u8 sks[4];
778 int sl, asc;
779
780 sbuff = scp->sense_buffer;
781 if (!sbuff) {
782 sdev_printk(KERN_ERR, scp->device,
783 "%s: sense_buffer is NULL\n", __func__);
784 return;
785 }
786 asc = c_d ? INVALID_FIELD_IN_CDB : INVALID_FIELD_IN_PARAM_LIST;
787 memset(sbuff, 0, SCSI_SENSE_BUFFERSIZE);
788 scsi_build_sense_buffer(sdebug_dsense, sbuff, ILLEGAL_REQUEST, asc, 0);
789 memset(sks, 0, sizeof(sks));
790 sks[0] = 0x80;
791 if (c_d)
792 sks[0] |= 0x40;
793 if (in_bit >= 0) {
794 sks[0] |= 0x8;
795 sks[0] |= 0x7 & in_bit;
796 }
797 put_unaligned_be16(in_byte, sks + 1);
798 if (sdebug_dsense) {
799 sl = sbuff[7] + 8;
800 sbuff[7] = sl;
801 sbuff[sl] = 0x2;
802 sbuff[sl + 1] = 0x6;
803 memcpy(sbuff + sl + 4, sks, 3);
804 } else
805 memcpy(sbuff + 15, sks, 3);
806 if (sdebug_verbose)
807 sdev_printk(KERN_INFO, scp->device, "%s: [sense_key,asc,ascq"
808 "]: [0x5,0x%x,0x0] %c byte=%d, bit=%d\n",
809 my_name, asc, c_d ? 'C' : 'D', in_byte, in_bit);
810 }
811
812 static void mk_sense_buffer(struct scsi_cmnd *scp, int key, int asc, int asq)
813 {
814 unsigned char *sbuff;
815
816 sbuff = scp->sense_buffer;
817 if (!sbuff) {
818 sdev_printk(KERN_ERR, scp->device,
819 "%s: sense_buffer is NULL\n", __func__);
820 return;
821 }
822 memset(sbuff, 0, SCSI_SENSE_BUFFERSIZE);
823
824 scsi_build_sense_buffer(sdebug_dsense, sbuff, key, asc, asq);
825
826 if (sdebug_verbose)
827 sdev_printk(KERN_INFO, scp->device,
828 "%s: [sense_key,asc,ascq]: [0x%x,0x%x,0x%x]\n",
829 my_name, key, asc, asq);
830 }
831
832 static void mk_sense_invalid_opcode(struct scsi_cmnd *scp)
833 {
834 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_OPCODE, 0);
835 }
836
837 static int scsi_debug_ioctl(struct scsi_device *dev, int cmd, void __user *arg)
838 {
839 if (sdebug_verbose) {
840 if (0x1261 == cmd)
841 sdev_printk(KERN_INFO, dev,
842 "%s: BLKFLSBUF [0x1261]\n", __func__);
843 else if (0x5331 == cmd)
844 sdev_printk(KERN_INFO, dev,
845 "%s: CDROM_GET_CAPABILITY [0x5331]\n",
846 __func__);
847 else
848 sdev_printk(KERN_INFO, dev, "%s: cmd=0x%x\n",
849 __func__, cmd);
850 }
851 return -EINVAL;
852 /* return -ENOTTY; // correct return but upsets fdisk */
853 }
854
855 static void config_cdb_len(struct scsi_device *sdev)
856 {
857 switch (sdebug_cdb_len) {
858 case 6: /* suggest 6 byte READ, WRITE and MODE SENSE/SELECT */
859 sdev->use_10_for_rw = false;
860 sdev->use_16_for_rw = false;
861 sdev->use_10_for_ms = false;
862 break;
863 case 10: /* suggest 10 byte RWs and 6 byte MODE SENSE/SELECT */
864 sdev->use_10_for_rw = true;
865 sdev->use_16_for_rw = false;
866 sdev->use_10_for_ms = false;
867 break;
868 case 12: /* suggest 10 byte RWs and 10 byte MODE SENSE/SELECT */
869 sdev->use_10_for_rw = true;
870 sdev->use_16_for_rw = false;
871 sdev->use_10_for_ms = true;
872 break;
873 case 16:
874 sdev->use_10_for_rw = false;
875 sdev->use_16_for_rw = true;
876 sdev->use_10_for_ms = true;
877 break;
878 case 32: /* No knobs to suggest this so same as 16 for now */
879 sdev->use_10_for_rw = false;
880 sdev->use_16_for_rw = true;
881 sdev->use_10_for_ms = true;
882 break;
883 default:
884 pr_warn("unexpected cdb_len=%d, force to 10\n",
885 sdebug_cdb_len);
886 sdev->use_10_for_rw = true;
887 sdev->use_16_for_rw = false;
888 sdev->use_10_for_ms = false;
889 sdebug_cdb_len = 10;
890 break;
891 }
892 }
893
894 static void all_config_cdb_len(void)
895 {
896 struct sdebug_host_info *sdbg_host;
897 struct Scsi_Host *shost;
898 struct scsi_device *sdev;
899
900 spin_lock(&sdebug_host_list_lock);
901 list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) {
902 shost = sdbg_host->shost;
903 shost_for_each_device(sdev, shost) {
904 config_cdb_len(sdev);
905 }
906 }
907 spin_unlock(&sdebug_host_list_lock);
908 }
909
910 static void clear_luns_changed_on_target(struct sdebug_dev_info *devip)
911 {
912 struct sdebug_host_info *sdhp;
913 struct sdebug_dev_info *dp;
914
915 spin_lock(&sdebug_host_list_lock);
916 list_for_each_entry(sdhp, &sdebug_host_list, host_list) {
917 list_for_each_entry(dp, &sdhp->dev_info_list, dev_list) {
918 if ((devip->sdbg_host == dp->sdbg_host) &&
919 (devip->target == dp->target))
920 clear_bit(SDEBUG_UA_LUNS_CHANGED, dp->uas_bm);
921 }
922 }
923 spin_unlock(&sdebug_host_list_lock);
924 }
925
926 static int make_ua(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
927 {
928 int k;
929
930 k = find_first_bit(devip->uas_bm, SDEBUG_NUM_UAS);
931 if (k != SDEBUG_NUM_UAS) {
932 const char *cp = NULL;
933
934 switch (k) {
935 case SDEBUG_UA_POR:
936 mk_sense_buffer(scp, UNIT_ATTENTION, UA_RESET_ASC,
937 POWER_ON_RESET_ASCQ);
938 if (sdebug_verbose)
939 cp = "power on reset";
940 break;
941 case SDEBUG_UA_BUS_RESET:
942 mk_sense_buffer(scp, UNIT_ATTENTION, UA_RESET_ASC,
943 BUS_RESET_ASCQ);
944 if (sdebug_verbose)
945 cp = "bus reset";
946 break;
947 case SDEBUG_UA_MODE_CHANGED:
948 mk_sense_buffer(scp, UNIT_ATTENTION, UA_CHANGED_ASC,
949 MODE_CHANGED_ASCQ);
950 if (sdebug_verbose)
951 cp = "mode parameters changed";
952 break;
953 case SDEBUG_UA_CAPACITY_CHANGED:
954 mk_sense_buffer(scp, UNIT_ATTENTION, UA_CHANGED_ASC,
955 CAPACITY_CHANGED_ASCQ);
956 if (sdebug_verbose)
957 cp = "capacity data changed";
958 break;
959 case SDEBUG_UA_MICROCODE_CHANGED:
960 mk_sense_buffer(scp, UNIT_ATTENTION,
961 TARGET_CHANGED_ASC,
962 MICROCODE_CHANGED_ASCQ);
963 if (sdebug_verbose)
964 cp = "microcode has been changed";
965 break;
966 case SDEBUG_UA_MICROCODE_CHANGED_WO_RESET:
967 mk_sense_buffer(scp, UNIT_ATTENTION,
968 TARGET_CHANGED_ASC,
969 MICROCODE_CHANGED_WO_RESET_ASCQ);
970 if (sdebug_verbose)
971 cp = "microcode has been changed without reset";
972 break;
973 case SDEBUG_UA_LUNS_CHANGED:
974 /*
975 * SPC-3 behavior is to report a UNIT ATTENTION with
976 * ASC/ASCQ REPORTED LUNS DATA HAS CHANGED on every LUN
977 * on the target, until a REPORT LUNS command is
978 * received. SPC-4 behavior is to report it only once.
979 * NOTE: sdebug_scsi_level does not use the same
980 * values as struct scsi_device->scsi_level.
981 */
982 if (sdebug_scsi_level >= 6) /* SPC-4 and above */
983 clear_luns_changed_on_target(devip);
984 mk_sense_buffer(scp, UNIT_ATTENTION,
985 TARGET_CHANGED_ASC,
986 LUNS_CHANGED_ASCQ);
987 if (sdebug_verbose)
988 cp = "reported luns data has changed";
989 break;
990 default:
991 pr_warn("unexpected unit attention code=%d\n", k);
992 if (sdebug_verbose)
993 cp = "unknown";
994 break;
995 }
996 clear_bit(k, devip->uas_bm);
997 if (sdebug_verbose)
998 sdev_printk(KERN_INFO, scp->device,
999 "%s reports: Unit attention: %s\n",
1000 my_name, cp);
1001 return check_condition_result;
1002 }
1003 return 0;
1004 }
1005
1006 /* Build SCSI "data-in" buffer. Returns 0 if ok else (DID_ERROR << 16). */
1007 static int fill_from_dev_buffer(struct scsi_cmnd *scp, unsigned char *arr,
1008 int arr_len)
1009 {
1010 int act_len;
1011 struct scsi_data_buffer *sdb = scsi_in(scp);
1012
1013 if (!sdb->length)
1014 return 0;
1015 if (!(scsi_bidi_cmnd(scp) || scp->sc_data_direction == DMA_FROM_DEVICE))
1016 return DID_ERROR << 16;
1017
1018 act_len = sg_copy_from_buffer(sdb->table.sgl, sdb->table.nents,
1019 arr, arr_len);
1020 sdb->resid = scsi_bufflen(scp) - act_len;
1021
1022 return 0;
1023 }
1024
1025 /* Partial build of SCSI "data-in" buffer. Returns 0 if ok else
1026 * (DID_ERROR << 16). Can write to offset in data-in buffer. If multiple
1027 * calls, not required to write in ascending offset order. Assumes resid
1028 * set to scsi_bufflen() prior to any calls.
1029 */
1030 static int p_fill_from_dev_buffer(struct scsi_cmnd *scp, const void *arr,
1031 int arr_len, unsigned int off_dst)
1032 {
1033 int act_len, n;
1034 struct scsi_data_buffer *sdb = scsi_in(scp);
1035 off_t skip = off_dst;
1036
1037 if (sdb->length <= off_dst)
1038 return 0;
1039 if (!(scsi_bidi_cmnd(scp) || scp->sc_data_direction == DMA_FROM_DEVICE))
1040 return DID_ERROR << 16;
1041
1042 act_len = sg_pcopy_from_buffer(sdb->table.sgl, sdb->table.nents,
1043 arr, arr_len, skip);
1044 pr_debug("%s: off_dst=%u, scsi_bufflen=%u, act_len=%u, resid=%d\n",
1045 __func__, off_dst, scsi_bufflen(scp), act_len, sdb->resid);
1046 n = (int)scsi_bufflen(scp) - ((int)off_dst + act_len);
1047 sdb->resid = min(sdb->resid, n);
1048 return 0;
1049 }
1050
1051 /* Fetches from SCSI "data-out" buffer. Returns number of bytes fetched into
1052 * 'arr' or -1 if error.
1053 */
1054 static int fetch_to_dev_buffer(struct scsi_cmnd *scp, unsigned char *arr,
1055 int arr_len)
1056 {
1057 if (!scsi_bufflen(scp))
1058 return 0;
1059 if (!(scsi_bidi_cmnd(scp) || scp->sc_data_direction == DMA_TO_DEVICE))
1060 return -1;
1061
1062 return scsi_sg_copy_to_buffer(scp, arr, arr_len);
1063 }
1064
1065
1066 static char sdebug_inq_vendor_id[9] = "Linux ";
1067 static char sdebug_inq_product_id[17] = "scsi_debug ";
1068 static char sdebug_inq_product_rev[5] = SDEBUG_VERSION;
1069 /* Use some locally assigned NAAs for SAS addresses. */
1070 static const u64 naa3_comp_a = 0x3222222000000000ULL;
1071 static const u64 naa3_comp_b = 0x3333333000000000ULL;
1072 static const u64 naa3_comp_c = 0x3111111000000000ULL;
1073
1074 /* Device identification VPD page. Returns number of bytes placed in arr */
1075 static int inquiry_vpd_83(unsigned char *arr, int port_group_id,
1076 int target_dev_id, int dev_id_num,
1077 const char *dev_id_str, int dev_id_str_len,
1078 const uuid_t *lu_name)
1079 {
1080 int num, port_a;
1081 char b[32];
1082
1083 port_a = target_dev_id + 1;
1084 /* T10 vendor identifier field format (faked) */
1085 arr[0] = 0x2; /* ASCII */
1086 arr[1] = 0x1;
1087 arr[2] = 0x0;
1088 memcpy(&arr[4], sdebug_inq_vendor_id, 8);
1089 memcpy(&arr[12], sdebug_inq_product_id, 16);
1090 memcpy(&arr[28], dev_id_str, dev_id_str_len);
1091 num = 8 + 16 + dev_id_str_len;
1092 arr[3] = num;
1093 num += 4;
1094 if (dev_id_num >= 0) {
1095 if (sdebug_uuid_ctl) {
1096 /* Locally assigned UUID */
1097 arr[num++] = 0x1; /* binary (not necessarily sas) */
1098 arr[num++] = 0xa; /* PIV=0, lu, naa */
1099 arr[num++] = 0x0;
1100 arr[num++] = 0x12;
1101 arr[num++] = 0x10; /* uuid type=1, locally assigned */
1102 arr[num++] = 0x0;
1103 memcpy(arr + num, lu_name, 16);
1104 num += 16;
1105 } else {
1106 /* NAA-3, Logical unit identifier (binary) */
1107 arr[num++] = 0x1; /* binary (not necessarily sas) */
1108 arr[num++] = 0x3; /* PIV=0, lu, naa */
1109 arr[num++] = 0x0;
1110 arr[num++] = 0x8;
1111 put_unaligned_be64(naa3_comp_b + dev_id_num, arr + num);
1112 num += 8;
1113 }
1114 /* Target relative port number */
1115 arr[num++] = 0x61; /* proto=sas, binary */
1116 arr[num++] = 0x94; /* PIV=1, target port, rel port */
1117 arr[num++] = 0x0; /* reserved */
1118 arr[num++] = 0x4; /* length */
1119 arr[num++] = 0x0; /* reserved */
1120 arr[num++] = 0x0; /* reserved */
1121 arr[num++] = 0x0;
1122 arr[num++] = 0x1; /* relative port A */
1123 }
1124 /* NAA-3, Target port identifier */
1125 arr[num++] = 0x61; /* proto=sas, binary */
1126 arr[num++] = 0x93; /* piv=1, target port, naa */
1127 arr[num++] = 0x0;
1128 arr[num++] = 0x8;
1129 put_unaligned_be64(naa3_comp_a + port_a, arr + num);
1130 num += 8;
1131 /* NAA-3, Target port group identifier */
1132 arr[num++] = 0x61; /* proto=sas, binary */
1133 arr[num++] = 0x95; /* piv=1, target port group id */
1134 arr[num++] = 0x0;
1135 arr[num++] = 0x4;
1136 arr[num++] = 0;
1137 arr[num++] = 0;
1138 put_unaligned_be16(port_group_id, arr + num);
1139 num += 2;
1140 /* NAA-3, Target device identifier */
1141 arr[num++] = 0x61; /* proto=sas, binary */
1142 arr[num++] = 0xa3; /* piv=1, target device, naa */
1143 arr[num++] = 0x0;
1144 arr[num++] = 0x8;
1145 put_unaligned_be64(naa3_comp_a + target_dev_id, arr + num);
1146 num += 8;
1147 /* SCSI name string: Target device identifier */
1148 arr[num++] = 0x63; /* proto=sas, UTF-8 */
1149 arr[num++] = 0xa8; /* piv=1, target device, SCSI name string */
1150 arr[num++] = 0x0;
1151 arr[num++] = 24;
1152 memcpy(arr + num, "naa.32222220", 12);
1153 num += 12;
1154 snprintf(b, sizeof(b), "%08X", target_dev_id);
1155 memcpy(arr + num, b, 8);
1156 num += 8;
1157 memset(arr + num, 0, 4);
1158 num += 4;
1159 return num;
1160 }
1161
1162 static unsigned char vpd84_data[] = {
1163 /* from 4th byte */ 0x22,0x22,0x22,0x0,0xbb,0x0,
1164 0x22,0x22,0x22,0x0,0xbb,0x1,
1165 0x22,0x22,0x22,0x0,0xbb,0x2,
1166 };
1167
1168 /* Software interface identification VPD page */
1169 static int inquiry_vpd_84(unsigned char *arr)
1170 {
1171 memcpy(arr, vpd84_data, sizeof(vpd84_data));
1172 return sizeof(vpd84_data);
1173 }
1174
1175 /* Management network addresses VPD page */
1176 static int inquiry_vpd_85(unsigned char *arr)
1177 {
1178 int num = 0;
1179 const char *na1 = "https://www.kernel.org/config";
1180 const char *na2 = "http://www.kernel.org/log";
1181 int plen, olen;
1182
1183 arr[num++] = 0x1; /* lu, storage config */
1184 arr[num++] = 0x0; /* reserved */
1185 arr[num++] = 0x0;
1186 olen = strlen(na1);
1187 plen = olen + 1;
1188 if (plen % 4)
1189 plen = ((plen / 4) + 1) * 4;
1190 arr[num++] = plen; /* length, null termianted, padded */
1191 memcpy(arr + num, na1, olen);
1192 memset(arr + num + olen, 0, plen - olen);
1193 num += plen;
1194
1195 arr[num++] = 0x4; /* lu, logging */
1196 arr[num++] = 0x0; /* reserved */
1197 arr[num++] = 0x0;
1198 olen = strlen(na2);
1199 plen = olen + 1;
1200 if (plen % 4)
1201 plen = ((plen / 4) + 1) * 4;
1202 arr[num++] = plen; /* length, null terminated, padded */
1203 memcpy(arr + num, na2, olen);
1204 memset(arr + num + olen, 0, plen - olen);
1205 num += plen;
1206
1207 return num;
1208 }
1209
1210 /* SCSI ports VPD page */
1211 static int inquiry_vpd_88(unsigned char *arr, int target_dev_id)
1212 {
1213 int num = 0;
1214 int port_a, port_b;
1215
1216 port_a = target_dev_id + 1;
1217 port_b = port_a + 1;
1218 arr[num++] = 0x0; /* reserved */
1219 arr[num++] = 0x0; /* reserved */
1220 arr[num++] = 0x0;
1221 arr[num++] = 0x1; /* relative port 1 (primary) */
1222 memset(arr + num, 0, 6);
1223 num += 6;
1224 arr[num++] = 0x0;
1225 arr[num++] = 12; /* length tp descriptor */
1226 /* naa-5 target port identifier (A) */
1227 arr[num++] = 0x61; /* proto=sas, binary */
1228 arr[num++] = 0x93; /* PIV=1, target port, NAA */
1229 arr[num++] = 0x0; /* reserved */
1230 arr[num++] = 0x8; /* length */
1231 put_unaligned_be64(naa3_comp_a + port_a, arr + num);
1232 num += 8;
1233 arr[num++] = 0x0; /* reserved */
1234 arr[num++] = 0x0; /* reserved */
1235 arr[num++] = 0x0;
1236 arr[num++] = 0x2; /* relative port 2 (secondary) */
1237 memset(arr + num, 0, 6);
1238 num += 6;
1239 arr[num++] = 0x0;
1240 arr[num++] = 12; /* length tp descriptor */
1241 /* naa-5 target port identifier (B) */
1242 arr[num++] = 0x61; /* proto=sas, binary */
1243 arr[num++] = 0x93; /* PIV=1, target port, NAA */
1244 arr[num++] = 0x0; /* reserved */
1245 arr[num++] = 0x8; /* length */
1246 put_unaligned_be64(naa3_comp_a + port_b, arr + num);
1247 num += 8;
1248
1249 return num;
1250 }
1251
1252
1253 static unsigned char vpd89_data[] = {
1254 /* from 4th byte */ 0,0,0,0,
1255 'l','i','n','u','x',' ',' ',' ',
1256 'S','A','T',' ','s','c','s','i','_','d','e','b','u','g',' ',' ',
1257 '1','2','3','4',
1258 0x34,0,0,0,1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,
1259 0xec,0,0,0,
1260 0x5a,0xc,0xff,0x3f,0x37,0xc8,0x10,0,0,0,0,0,0x3f,0,0,0,
1261 0,0,0,0,0x58,0x58,0x58,0x58,0x58,0x58,0x58,0x58,0x20,0x20,0x20,0x20,
1262 0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0,0,0,0x40,0x4,0,0x2e,0x33,
1263 0x38,0x31,0x20,0x20,0x20,0x20,0x54,0x53,0x38,0x33,0x30,0x30,0x33,0x31,
1264 0x53,0x41,
1265 0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,
1266 0x20,0x20,
1267 0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,
1268 0x10,0x80,
1269 0,0,0,0x2f,0,0,0,0x2,0,0x2,0x7,0,0xff,0xff,0x1,0,
1270 0x3f,0,0xc1,0xff,0x3e,0,0x10,0x1,0xb0,0xf8,0x50,0x9,0,0,0x7,0,
1271 0x3,0,0x78,0,0x78,0,0xf0,0,0x78,0,0,0,0,0,0,0,
1272 0,0,0,0,0,0,0,0,0x2,0,0,0,0,0,0,0,
1273 0x7e,0,0x1b,0,0x6b,0x34,0x1,0x7d,0x3,0x40,0x69,0x34,0x1,0x3c,0x3,0x40,
1274 0x7f,0x40,0,0,0,0,0xfe,0xfe,0,0,0,0,0,0xfe,0,0,
1275 0,0,0,0,0,0,0,0,0xb0,0xf8,0x50,0x9,0,0,0,0,
1276 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1277 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1278 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1279 0x1,0,0xb0,0xf8,0x50,0x9,0xb0,0xf8,0x50,0x9,0x20,0x20,0x2,0,0xb6,0x42,
1280 0,0x80,0x8a,0,0x6,0x3c,0xa,0x3c,0xff,0xff,0xc6,0x7,0,0x1,0,0x8,
1281 0xf0,0xf,0,0x10,0x2,0,0x30,0,0,0,0,0,0,0,0x6,0xfe,
1282 0,0,0x2,0,0x50,0,0x8a,0,0x4f,0x95,0,0,0x21,0,0xb,0,
1283 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1284 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1285 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1286 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1287 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1288 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1289 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1290 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1291 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1292 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1293 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1294 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0xa5,0x51,
1295 };
1296
1297 /* ATA Information VPD page */
1298 static int inquiry_vpd_89(unsigned char *arr)
1299 {
1300 memcpy(arr, vpd89_data, sizeof(vpd89_data));
1301 return sizeof(vpd89_data);
1302 }
1303
1304
1305 static unsigned char vpdb0_data[] = {
1306 /* from 4th byte */ 0,0,0,4, 0,0,0x4,0, 0,0,0,64,
1307 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1308 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1309 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1310 };
1311
1312 /* Block limits VPD page (SBC-3) */
1313 static int inquiry_vpd_b0(unsigned char *arr)
1314 {
1315 unsigned int gran;
1316
1317 memcpy(arr, vpdb0_data, sizeof(vpdb0_data));
1318
1319 /* Optimal transfer length granularity */
1320 if (sdebug_opt_xferlen_exp != 0 &&
1321 sdebug_physblk_exp < sdebug_opt_xferlen_exp)
1322 gran = 1 << sdebug_opt_xferlen_exp;
1323 else
1324 gran = 1 << sdebug_physblk_exp;
1325 put_unaligned_be16(gran, arr + 2);
1326
1327 /* Maximum Transfer Length */
1328 if (sdebug_store_sectors > 0x400)
1329 put_unaligned_be32(sdebug_store_sectors, arr + 4);
1330
1331 /* Optimal Transfer Length */
1332 put_unaligned_be32(sdebug_opt_blks, &arr[8]);
1333
1334 if (sdebug_lbpu) {
1335 /* Maximum Unmap LBA Count */
1336 put_unaligned_be32(sdebug_unmap_max_blocks, &arr[16]);
1337
1338 /* Maximum Unmap Block Descriptor Count */
1339 put_unaligned_be32(sdebug_unmap_max_desc, &arr[20]);
1340 }
1341
1342 /* Unmap Granularity Alignment */
1343 if (sdebug_unmap_alignment) {
1344 put_unaligned_be32(sdebug_unmap_alignment, &arr[28]);
1345 arr[28] |= 0x80; /* UGAVALID */
1346 }
1347
1348 /* Optimal Unmap Granularity */
1349 put_unaligned_be32(sdebug_unmap_granularity, &arr[24]);
1350
1351 /* Maximum WRITE SAME Length */
1352 put_unaligned_be64(sdebug_write_same_length, &arr[32]);
1353
1354 return 0x3c; /* Mandatory page length for Logical Block Provisioning */
1355
1356 return sizeof(vpdb0_data);
1357 }
1358
1359 /* Block device characteristics VPD page (SBC-3) */
1360 static int inquiry_vpd_b1(unsigned char *arr)
1361 {
1362 memset(arr, 0, 0x3c);
1363 arr[0] = 0;
1364 arr[1] = 1; /* non rotating medium (e.g. solid state) */
1365 arr[2] = 0;
1366 arr[3] = 5; /* less than 1.8" */
1367
1368 return 0x3c;
1369 }
1370
1371 /* Logical block provisioning VPD page (SBC-4) */
1372 static int inquiry_vpd_b2(unsigned char *arr)
1373 {
1374 memset(arr, 0, 0x4);
1375 arr[0] = 0; /* threshold exponent */
1376 if (sdebug_lbpu)
1377 arr[1] = 1 << 7;
1378 if (sdebug_lbpws)
1379 arr[1] |= 1 << 6;
1380 if (sdebug_lbpws10)
1381 arr[1] |= 1 << 5;
1382 if (sdebug_lbprz && scsi_debug_lbp())
1383 arr[1] |= (sdebug_lbprz & 0x7) << 2; /* sbc4r07 and later */
1384 /* anc_sup=0; dp=0 (no provisioning group descriptor) */
1385 /* minimum_percentage=0; provisioning_type=0 (unknown) */
1386 /* threshold_percentage=0 */
1387 return 0x4;
1388 }
1389
1390 #define SDEBUG_LONG_INQ_SZ 96
1391 #define SDEBUG_MAX_INQ_ARR_SZ 584
1392
1393 static int resp_inquiry(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
1394 {
1395 unsigned char pq_pdt;
1396 unsigned char *arr;
1397 unsigned char *cmd = scp->cmnd;
1398 int alloc_len, n, ret;
1399 bool have_wlun, is_disk;
1400
1401 alloc_len = get_unaligned_be16(cmd + 3);
1402 arr = kzalloc(SDEBUG_MAX_INQ_ARR_SZ, GFP_ATOMIC);
1403 if (! arr)
1404 return DID_REQUEUE << 16;
1405 is_disk = (sdebug_ptype == TYPE_DISK);
1406 have_wlun = scsi_is_wlun(scp->device->lun);
1407 if (have_wlun)
1408 pq_pdt = TYPE_WLUN; /* present, wlun */
1409 else if (sdebug_no_lun_0 && (devip->lun == SDEBUG_LUN_0_VAL))
1410 pq_pdt = 0x7f; /* not present, PQ=3, PDT=0x1f */
1411 else
1412 pq_pdt = (sdebug_ptype & 0x1f);
1413 arr[0] = pq_pdt;
1414 if (0x2 & cmd[1]) { /* CMDDT bit set */
1415 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 1);
1416 kfree(arr);
1417 return check_condition_result;
1418 } else if (0x1 & cmd[1]) { /* EVPD bit set */
1419 int lu_id_num, port_group_id, target_dev_id, len;
1420 char lu_id_str[6];
1421 int host_no = devip->sdbg_host->shost->host_no;
1422
1423 port_group_id = (((host_no + 1) & 0x7f) << 8) +
1424 (devip->channel & 0x7f);
1425 if (sdebug_vpd_use_hostno == 0)
1426 host_no = 0;
1427 lu_id_num = have_wlun ? -1 : (((host_no + 1) * 2000) +
1428 (devip->target * 1000) + devip->lun);
1429 target_dev_id = ((host_no + 1) * 2000) +
1430 (devip->target * 1000) - 3;
1431 len = scnprintf(lu_id_str, 6, "%d", lu_id_num);
1432 if (0 == cmd[2]) { /* supported vital product data pages */
1433 arr[1] = cmd[2]; /*sanity */
1434 n = 4;
1435 arr[n++] = 0x0; /* this page */
1436 arr[n++] = 0x80; /* unit serial number */
1437 arr[n++] = 0x83; /* device identification */
1438 arr[n++] = 0x84; /* software interface ident. */
1439 arr[n++] = 0x85; /* management network addresses */
1440 arr[n++] = 0x86; /* extended inquiry */
1441 arr[n++] = 0x87; /* mode page policy */
1442 arr[n++] = 0x88; /* SCSI ports */
1443 if (is_disk) { /* SBC only */
1444 arr[n++] = 0x89; /* ATA information */
1445 arr[n++] = 0xb0; /* Block limits */
1446 arr[n++] = 0xb1; /* Block characteristics */
1447 arr[n++] = 0xb2; /* Logical Block Prov */
1448 }
1449 arr[3] = n - 4; /* number of supported VPD pages */
1450 } else if (0x80 == cmd[2]) { /* unit serial number */
1451 arr[1] = cmd[2]; /*sanity */
1452 arr[3] = len;
1453 memcpy(&arr[4], lu_id_str, len);
1454 } else if (0x83 == cmd[2]) { /* device identification */
1455 arr[1] = cmd[2]; /*sanity */
1456 arr[3] = inquiry_vpd_83(&arr[4], port_group_id,
1457 target_dev_id, lu_id_num,
1458 lu_id_str, len,
1459 &devip->lu_name);
1460 } else if (0x84 == cmd[2]) { /* Software interface ident. */
1461 arr[1] = cmd[2]; /*sanity */
1462 arr[3] = inquiry_vpd_84(&arr[4]);
1463 } else if (0x85 == cmd[2]) { /* Management network addresses */
1464 arr[1] = cmd[2]; /*sanity */
1465 arr[3] = inquiry_vpd_85(&arr[4]);
1466 } else if (0x86 == cmd[2]) { /* extended inquiry */
1467 arr[1] = cmd[2]; /*sanity */
1468 arr[3] = 0x3c; /* number of following entries */
1469 if (sdebug_dif == T10_PI_TYPE3_PROTECTION)
1470 arr[4] = 0x4; /* SPT: GRD_CHK:1 */
1471 else if (have_dif_prot)
1472 arr[4] = 0x5; /* SPT: GRD_CHK:1, REF_CHK:1 */
1473 else
1474 arr[4] = 0x0; /* no protection stuff */
1475 arr[5] = 0x7; /* head of q, ordered + simple q's */
1476 } else if (0x87 == cmd[2]) { /* mode page policy */
1477 arr[1] = cmd[2]; /*sanity */
1478 arr[3] = 0x8; /* number of following entries */
1479 arr[4] = 0x2; /* disconnect-reconnect mp */
1480 arr[6] = 0x80; /* mlus, shared */
1481 arr[8] = 0x18; /* protocol specific lu */
1482 arr[10] = 0x82; /* mlus, per initiator port */
1483 } else if (0x88 == cmd[2]) { /* SCSI Ports */
1484 arr[1] = cmd[2]; /*sanity */
1485 arr[3] = inquiry_vpd_88(&arr[4], target_dev_id);
1486 } else if (is_disk && 0x89 == cmd[2]) { /* ATA information */
1487 arr[1] = cmd[2]; /*sanity */
1488 n = inquiry_vpd_89(&arr[4]);
1489 put_unaligned_be16(n, arr + 2);
1490 } else if (is_disk && 0xb0 == cmd[2]) { /* Block limits */
1491 arr[1] = cmd[2]; /*sanity */
1492 arr[3] = inquiry_vpd_b0(&arr[4]);
1493 } else if (is_disk && 0xb1 == cmd[2]) { /* Block char. */
1494 arr[1] = cmd[2]; /*sanity */
1495 arr[3] = inquiry_vpd_b1(&arr[4]);
1496 } else if (is_disk && 0xb2 == cmd[2]) { /* LB Prov. */
1497 arr[1] = cmd[2]; /*sanity */
1498 arr[3] = inquiry_vpd_b2(&arr[4]);
1499 } else {
1500 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, -1);
1501 kfree(arr);
1502 return check_condition_result;
1503 }
1504 len = min(get_unaligned_be16(arr + 2) + 4, alloc_len);
1505 ret = fill_from_dev_buffer(scp, arr,
1506 min(len, SDEBUG_MAX_INQ_ARR_SZ));
1507 kfree(arr);
1508 return ret;
1509 }
1510 /* drops through here for a standard inquiry */
1511 arr[1] = sdebug_removable ? 0x80 : 0; /* Removable disk */
1512 arr[2] = sdebug_scsi_level;
1513 arr[3] = 2; /* response_data_format==2 */
1514 arr[4] = SDEBUG_LONG_INQ_SZ - 5;
1515 arr[5] = (int)have_dif_prot; /* PROTECT bit */
1516 if (sdebug_vpd_use_hostno == 0)
1517 arr[5] |= 0x10; /* claim: implicit TPGS */
1518 arr[6] = 0x10; /* claim: MultiP */
1519 /* arr[6] |= 0x40; ... claim: EncServ (enclosure services) */
1520 arr[7] = 0xa; /* claim: LINKED + CMDQUE */
1521 memcpy(&arr[8], sdebug_inq_vendor_id, 8);
1522 memcpy(&arr[16], sdebug_inq_product_id, 16);
1523 memcpy(&arr[32], sdebug_inq_product_rev, 4);
1524 /* Use Vendor Specific area to place driver date in ASCII hex */
1525 memcpy(&arr[36], sdebug_version_date, 8);
1526 /* version descriptors (2 bytes each) follow */
1527 put_unaligned_be16(0xc0, arr + 58); /* SAM-6 no version claimed */
1528 put_unaligned_be16(0x5c0, arr + 60); /* SPC-5 no version claimed */
1529 n = 62;
1530 if (is_disk) { /* SBC-4 no version claimed */
1531 put_unaligned_be16(0x600, arr + n);
1532 n += 2;
1533 } else if (sdebug_ptype == TYPE_TAPE) { /* SSC-4 rev 3 */
1534 put_unaligned_be16(0x525, arr + n);
1535 n += 2;
1536 }
1537 put_unaligned_be16(0x2100, arr + n); /* SPL-4 no version claimed */
1538 ret = fill_from_dev_buffer(scp, arr,
1539 min(alloc_len, SDEBUG_LONG_INQ_SZ));
1540 kfree(arr);
1541 return ret;
1542 }
1543
1544 static unsigned char iec_m_pg[] = {0x1c, 0xa, 0x08, 0, 0, 0, 0, 0,
1545 0, 0, 0x0, 0x0};
1546
1547 static int resp_requests(struct scsi_cmnd *scp,
1548 struct sdebug_dev_info *devip)
1549 {
1550 unsigned char *sbuff;
1551 unsigned char *cmd = scp->cmnd;
1552 unsigned char arr[SCSI_SENSE_BUFFERSIZE];
1553 bool dsense;
1554 int len = 18;
1555
1556 memset(arr, 0, sizeof(arr));
1557 dsense = !!(cmd[1] & 1);
1558 sbuff = scp->sense_buffer;
1559 if ((iec_m_pg[2] & 0x4) && (6 == (iec_m_pg[3] & 0xf))) {
1560 if (dsense) {
1561 arr[0] = 0x72;
1562 arr[1] = 0x0; /* NO_SENSE in sense_key */
1563 arr[2] = THRESHOLD_EXCEEDED;
1564 arr[3] = 0xff; /* TEST set and MRIE==6 */
1565 len = 8;
1566 } else {
1567 arr[0] = 0x70;
1568 arr[2] = 0x0; /* NO_SENSE in sense_key */
1569 arr[7] = 0xa; /* 18 byte sense buffer */
1570 arr[12] = THRESHOLD_EXCEEDED;
1571 arr[13] = 0xff; /* TEST set and MRIE==6 */
1572 }
1573 } else {
1574 memcpy(arr, sbuff, SCSI_SENSE_BUFFERSIZE);
1575 if (arr[0] >= 0x70 && dsense == sdebug_dsense)
1576 ; /* have sense and formats match */
1577 else if (arr[0] <= 0x70) {
1578 if (dsense) {
1579 memset(arr, 0, 8);
1580 arr[0] = 0x72;
1581 len = 8;
1582 } else {
1583 memset(arr, 0, 18);
1584 arr[0] = 0x70;
1585 arr[7] = 0xa;
1586 }
1587 } else if (dsense) {
1588 memset(arr, 0, 8);
1589 arr[0] = 0x72;
1590 arr[1] = sbuff[2]; /* sense key */
1591 arr[2] = sbuff[12]; /* asc */
1592 arr[3] = sbuff[13]; /* ascq */
1593 len = 8;
1594 } else {
1595 memset(arr, 0, 18);
1596 arr[0] = 0x70;
1597 arr[2] = sbuff[1];
1598 arr[7] = 0xa;
1599 arr[12] = sbuff[1];
1600 arr[13] = sbuff[3];
1601 }
1602
1603 }
1604 mk_sense_buffer(scp, 0, NO_ADDITIONAL_SENSE, 0);
1605 return fill_from_dev_buffer(scp, arr, len);
1606 }
1607
1608 static int resp_start_stop(struct scsi_cmnd *scp,
1609 struct sdebug_dev_info *devip)
1610 {
1611 unsigned char *cmd = scp->cmnd;
1612 int power_cond, stop;
1613 bool changing;
1614
1615 power_cond = (cmd[4] & 0xf0) >> 4;
1616 if (power_cond) {
1617 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 4, 7);
1618 return check_condition_result;
1619 }
1620 stop = !(cmd[4] & 1);
1621 changing = atomic_read(&devip->stopped) == !stop;
1622 atomic_xchg(&devip->stopped, stop);
1623 if (!changing || cmd[1] & 0x1) /* state unchanged or IMMED set */
1624 return SDEG_RES_IMMED_MASK;
1625 else
1626 return 0;
1627 }
1628
1629 static sector_t get_sdebug_capacity(void)
1630 {
1631 static const unsigned int gibibyte = 1073741824;
1632
1633 if (sdebug_virtual_gb > 0)
1634 return (sector_t)sdebug_virtual_gb *
1635 (gibibyte / sdebug_sector_size);
1636 else
1637 return sdebug_store_sectors;
1638 }
1639
1640 #define SDEBUG_READCAP_ARR_SZ 8
1641 static int resp_readcap(struct scsi_cmnd *scp,
1642 struct sdebug_dev_info *devip)
1643 {
1644 unsigned char arr[SDEBUG_READCAP_ARR_SZ];
1645 unsigned int capac;
1646
1647 /* following just in case virtual_gb changed */
1648 sdebug_capacity = get_sdebug_capacity();
1649 memset(arr, 0, SDEBUG_READCAP_ARR_SZ);
1650 if (sdebug_capacity < 0xffffffff) {
1651 capac = (unsigned int)sdebug_capacity - 1;
1652 put_unaligned_be32(capac, arr + 0);
1653 } else
1654 put_unaligned_be32(0xffffffff, arr + 0);
1655 put_unaligned_be16(sdebug_sector_size, arr + 6);
1656 return fill_from_dev_buffer(scp, arr, SDEBUG_READCAP_ARR_SZ);
1657 }
1658
1659 #define SDEBUG_READCAP16_ARR_SZ 32
1660 static int resp_readcap16(struct scsi_cmnd *scp,
1661 struct sdebug_dev_info *devip)
1662 {
1663 unsigned char *cmd = scp->cmnd;
1664 unsigned char arr[SDEBUG_READCAP16_ARR_SZ];
1665 int alloc_len;
1666
1667 alloc_len = get_unaligned_be32(cmd + 10);
1668 /* following just in case virtual_gb changed */
1669 sdebug_capacity = get_sdebug_capacity();
1670 memset(arr, 0, SDEBUG_READCAP16_ARR_SZ);
1671 put_unaligned_be64((u64)(sdebug_capacity - 1), arr + 0);
1672 put_unaligned_be32(sdebug_sector_size, arr + 8);
1673 arr[13] = sdebug_physblk_exp & 0xf;
1674 arr[14] = (sdebug_lowest_aligned >> 8) & 0x3f;
1675
1676 if (scsi_debug_lbp()) {
1677 arr[14] |= 0x80; /* LBPME */
1678 /* from sbc4r07, this LBPRZ field is 1 bit, but the LBPRZ in
1679 * the LB Provisioning VPD page is 3 bits. Note that lbprz=2
1680 * in the wider field maps to 0 in this field.
1681 */
1682 if (sdebug_lbprz & 1) /* precisely what the draft requires */
1683 arr[14] |= 0x40;
1684 }
1685
1686 arr[15] = sdebug_lowest_aligned & 0xff;
1687
1688 if (have_dif_prot) {
1689 arr[12] = (sdebug_dif - 1) << 1; /* P_TYPE */
1690 arr[12] |= 1; /* PROT_EN */
1691 }
1692
1693 return fill_from_dev_buffer(scp, arr,
1694 min(alloc_len, SDEBUG_READCAP16_ARR_SZ));
1695 }
1696
1697 #define SDEBUG_MAX_TGTPGS_ARR_SZ 1412
1698
1699 static int resp_report_tgtpgs(struct scsi_cmnd *scp,
1700 struct sdebug_dev_info *devip)
1701 {
1702 unsigned char *cmd = scp->cmnd;
1703 unsigned char *arr;
1704 int host_no = devip->sdbg_host->shost->host_no;
1705 int n, ret, alen, rlen;
1706 int port_group_a, port_group_b, port_a, port_b;
1707
1708 alen = get_unaligned_be32(cmd + 6);
1709 arr = kzalloc(SDEBUG_MAX_TGTPGS_ARR_SZ, GFP_ATOMIC);
1710 if (! arr)
1711 return DID_REQUEUE << 16;
1712 /*
1713 * EVPD page 0x88 states we have two ports, one
1714 * real and a fake port with no device connected.
1715 * So we create two port groups with one port each
1716 * and set the group with port B to unavailable.
1717 */
1718 port_a = 0x1; /* relative port A */
1719 port_b = 0x2; /* relative port B */
1720 port_group_a = (((host_no + 1) & 0x7f) << 8) +
1721 (devip->channel & 0x7f);
1722 port_group_b = (((host_no + 1) & 0x7f) << 8) +
1723 (devip->channel & 0x7f) + 0x80;
1724
1725 /*
1726 * The asymmetric access state is cycled according to the host_id.
1727 */
1728 n = 4;
1729 if (sdebug_vpd_use_hostno == 0) {
1730 arr[n++] = host_no % 3; /* Asymm access state */
1731 arr[n++] = 0x0F; /* claim: all states are supported */
1732 } else {
1733 arr[n++] = 0x0; /* Active/Optimized path */
1734 arr[n++] = 0x01; /* only support active/optimized paths */
1735 }
1736 put_unaligned_be16(port_group_a, arr + n);
1737 n += 2;
1738 arr[n++] = 0; /* Reserved */
1739 arr[n++] = 0; /* Status code */
1740 arr[n++] = 0; /* Vendor unique */
1741 arr[n++] = 0x1; /* One port per group */
1742 arr[n++] = 0; /* Reserved */
1743 arr[n++] = 0; /* Reserved */
1744 put_unaligned_be16(port_a, arr + n);
1745 n += 2;
1746 arr[n++] = 3; /* Port unavailable */
1747 arr[n++] = 0x08; /* claim: only unavailalbe paths are supported */
1748 put_unaligned_be16(port_group_b, arr + n);
1749 n += 2;
1750 arr[n++] = 0; /* Reserved */
1751 arr[n++] = 0; /* Status code */
1752 arr[n++] = 0; /* Vendor unique */
1753 arr[n++] = 0x1; /* One port per group */
1754 arr[n++] = 0; /* Reserved */
1755 arr[n++] = 0; /* Reserved */
1756 put_unaligned_be16(port_b, arr + n);
1757 n += 2;
1758
1759 rlen = n - 4;
1760 put_unaligned_be32(rlen, arr + 0);
1761
1762 /*
1763 * Return the smallest value of either
1764 * - The allocated length
1765 * - The constructed command length
1766 * - The maximum array size
1767 */
1768 rlen = min(alen,n);
1769 ret = fill_from_dev_buffer(scp, arr,
1770 min(rlen, SDEBUG_MAX_TGTPGS_ARR_SZ));
1771 kfree(arr);
1772 return ret;
1773 }
1774
1775 static int resp_rsup_opcodes(struct scsi_cmnd *scp,
1776 struct sdebug_dev_info *devip)
1777 {
1778 bool rctd;
1779 u8 reporting_opts, req_opcode, sdeb_i, supp;
1780 u16 req_sa, u;
1781 u32 alloc_len, a_len;
1782 int k, offset, len, errsts, count, bump, na;
1783 const struct opcode_info_t *oip;
1784 const struct opcode_info_t *r_oip;
1785 u8 *arr;
1786 u8 *cmd = scp->cmnd;
1787
1788 rctd = !!(cmd[2] & 0x80);
1789 reporting_opts = cmd[2] & 0x7;
1790 req_opcode = cmd[3];
1791 req_sa = get_unaligned_be16(cmd + 4);
1792 alloc_len = get_unaligned_be32(cmd + 6);
1793 if (alloc_len < 4 || alloc_len > 0xffff) {
1794 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 6, -1);
1795 return check_condition_result;
1796 }
1797 if (alloc_len > 8192)
1798 a_len = 8192;
1799 else
1800 a_len = alloc_len;
1801 arr = kzalloc((a_len < 256) ? 320 : a_len + 64, GFP_ATOMIC);
1802 if (NULL == arr) {
1803 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
1804 INSUFF_RES_ASCQ);
1805 return check_condition_result;
1806 }
1807 switch (reporting_opts) {
1808 case 0: /* all commands */
1809 /* count number of commands */
1810 for (count = 0, oip = opcode_info_arr;
1811 oip->num_attached != 0xff; ++oip) {
1812 if (F_INV_OP & oip->flags)
1813 continue;
1814 count += (oip->num_attached + 1);
1815 }
1816 bump = rctd ? 20 : 8;
1817 put_unaligned_be32(count * bump, arr);
1818 for (offset = 4, oip = opcode_info_arr;
1819 oip->num_attached != 0xff && offset < a_len; ++oip) {
1820 if (F_INV_OP & oip->flags)
1821 continue;
1822 na = oip->num_attached;
1823 arr[offset] = oip->opcode;
1824 put_unaligned_be16(oip->sa, arr + offset + 2);
1825 if (rctd)
1826 arr[offset + 5] |= 0x2;
1827 if (FF_SA & oip->flags)
1828 arr[offset + 5] |= 0x1;
1829 put_unaligned_be16(oip->len_mask[0], arr + offset + 6);
1830 if (rctd)
1831 put_unaligned_be16(0xa, arr + offset + 8);
1832 r_oip = oip;
1833 for (k = 0, oip = oip->arrp; k < na; ++k, ++oip) {
1834 if (F_INV_OP & oip->flags)
1835 continue;
1836 offset += bump;
1837 arr[offset] = oip->opcode;
1838 put_unaligned_be16(oip->sa, arr + offset + 2);
1839 if (rctd)
1840 arr[offset + 5] |= 0x2;
1841 if (FF_SA & oip->flags)
1842 arr[offset + 5] |= 0x1;
1843 put_unaligned_be16(oip->len_mask[0],
1844 arr + offset + 6);
1845 if (rctd)
1846 put_unaligned_be16(0xa,
1847 arr + offset + 8);
1848 }
1849 oip = r_oip;
1850 offset += bump;
1851 }
1852 break;
1853 case 1: /* one command: opcode only */
1854 case 2: /* one command: opcode plus service action */
1855 case 3: /* one command: if sa==0 then opcode only else opcode+sa */
1856 sdeb_i = opcode_ind_arr[req_opcode];
1857 oip = &opcode_info_arr[sdeb_i];
1858 if (F_INV_OP & oip->flags) {
1859 supp = 1;
1860 offset = 4;
1861 } else {
1862 if (1 == reporting_opts) {
1863 if (FF_SA & oip->flags) {
1864 mk_sense_invalid_fld(scp, SDEB_IN_CDB,
1865 2, 2);
1866 kfree(arr);
1867 return check_condition_result;
1868 }
1869 req_sa = 0;
1870 } else if (2 == reporting_opts &&
1871 0 == (FF_SA & oip->flags)) {
1872 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 4, -1);
1873 kfree(arr); /* point at requested sa */
1874 return check_condition_result;
1875 }
1876 if (0 == (FF_SA & oip->flags) &&
1877 req_opcode == oip->opcode)
1878 supp = 3;
1879 else if (0 == (FF_SA & oip->flags)) {
1880 na = oip->num_attached;
1881 for (k = 0, oip = oip->arrp; k < na;
1882 ++k, ++oip) {
1883 if (req_opcode == oip->opcode)
1884 break;
1885 }
1886 supp = (k >= na) ? 1 : 3;
1887 } else if (req_sa != oip->sa) {
1888 na = oip->num_attached;
1889 for (k = 0, oip = oip->arrp; k < na;
1890 ++k, ++oip) {
1891 if (req_sa == oip->sa)
1892 break;
1893 }
1894 supp = (k >= na) ? 1 : 3;
1895 } else
1896 supp = 3;
1897 if (3 == supp) {
1898 u = oip->len_mask[0];
1899 put_unaligned_be16(u, arr + 2);
1900 arr[4] = oip->opcode;
1901 for (k = 1; k < u; ++k)
1902 arr[4 + k] = (k < 16) ?
1903 oip->len_mask[k] : 0xff;
1904 offset = 4 + u;
1905 } else
1906 offset = 4;
1907 }
1908 arr[1] = (rctd ? 0x80 : 0) | supp;
1909 if (rctd) {
1910 put_unaligned_be16(0xa, arr + offset);
1911 offset += 12;
1912 }
1913 break;
1914 default:
1915 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 2);
1916 kfree(arr);
1917 return check_condition_result;
1918 }
1919 offset = (offset < a_len) ? offset : a_len;
1920 len = (offset < alloc_len) ? offset : alloc_len;
1921 errsts = fill_from_dev_buffer(scp, arr, len);
1922 kfree(arr);
1923 return errsts;
1924 }
1925
1926 static int resp_rsup_tmfs(struct scsi_cmnd *scp,
1927 struct sdebug_dev_info *devip)
1928 {
1929 bool repd;
1930 u32 alloc_len, len;
1931 u8 arr[16];
1932 u8 *cmd = scp->cmnd;
1933
1934 memset(arr, 0, sizeof(arr));
1935 repd = !!(cmd[2] & 0x80);
1936 alloc_len = get_unaligned_be32(cmd + 6);
1937 if (alloc_len < 4) {
1938 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 6, -1);
1939 return check_condition_result;
1940 }
1941 arr[0] = 0xc8; /* ATS | ATSS | LURS */
1942 arr[1] = 0x1; /* ITNRS */
1943 if (repd) {
1944 arr[3] = 0xc;
1945 len = 16;
1946 } else
1947 len = 4;
1948
1949 len = (len < alloc_len) ? len : alloc_len;
1950 return fill_from_dev_buffer(scp, arr, len);
1951 }
1952
1953 /* <<Following mode page info copied from ST318451LW>> */
1954
1955 static int resp_err_recov_pg(unsigned char *p, int pcontrol, int target)
1956 { /* Read-Write Error Recovery page for mode_sense */
1957 unsigned char err_recov_pg[] = {0x1, 0xa, 0xc0, 11, 240, 0, 0, 0,
1958 5, 0, 0xff, 0xff};
1959
1960 memcpy(p, err_recov_pg, sizeof(err_recov_pg));
1961 if (1 == pcontrol)
1962 memset(p + 2, 0, sizeof(err_recov_pg) - 2);
1963 return sizeof(err_recov_pg);
1964 }
1965
1966 static int resp_disconnect_pg(unsigned char *p, int pcontrol, int target)
1967 { /* Disconnect-Reconnect page for mode_sense */
1968 unsigned char disconnect_pg[] = {0x2, 0xe, 128, 128, 0, 10, 0, 0,
1969 0, 0, 0, 0, 0, 0, 0, 0};
1970
1971 memcpy(p, disconnect_pg, sizeof(disconnect_pg));
1972 if (1 == pcontrol)
1973 memset(p + 2, 0, sizeof(disconnect_pg) - 2);
1974 return sizeof(disconnect_pg);
1975 }
1976
1977 static int resp_format_pg(unsigned char *p, int pcontrol, int target)
1978 { /* Format device page for mode_sense */
1979 unsigned char format_pg[] = {0x3, 0x16, 0, 0, 0, 0, 0, 0,
1980 0, 0, 0, 0, 0, 0, 0, 0,
1981 0, 0, 0, 0, 0x40, 0, 0, 0};
1982
1983 memcpy(p, format_pg, sizeof(format_pg));
1984 put_unaligned_be16(sdebug_sectors_per, p + 10);
1985 put_unaligned_be16(sdebug_sector_size, p + 12);
1986 if (sdebug_removable)
1987 p[20] |= 0x20; /* should agree with INQUIRY */
1988 if (1 == pcontrol)
1989 memset(p + 2, 0, sizeof(format_pg) - 2);
1990 return sizeof(format_pg);
1991 }
1992
1993 static unsigned char caching_pg[] = {0x8, 18, 0x14, 0, 0xff, 0xff, 0, 0,
1994 0xff, 0xff, 0xff, 0xff, 0x80, 0x14, 0, 0,
1995 0, 0, 0, 0};
1996
1997 static int resp_caching_pg(unsigned char *p, int pcontrol, int target)
1998 { /* Caching page for mode_sense */
1999 unsigned char ch_caching_pg[] = {/* 0x8, 18, */ 0x4, 0, 0, 0, 0, 0,
2000 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
2001 unsigned char d_caching_pg[] = {0x8, 18, 0x14, 0, 0xff, 0xff, 0, 0,
2002 0xff, 0xff, 0xff, 0xff, 0x80, 0x14, 0, 0, 0, 0, 0, 0};
2003
2004 if (SDEBUG_OPT_N_WCE & sdebug_opts)
2005 caching_pg[2] &= ~0x4; /* set WCE=0 (default WCE=1) */
2006 memcpy(p, caching_pg, sizeof(caching_pg));
2007 if (1 == pcontrol)
2008 memcpy(p + 2, ch_caching_pg, sizeof(ch_caching_pg));
2009 else if (2 == pcontrol)
2010 memcpy(p, d_caching_pg, sizeof(d_caching_pg));
2011 return sizeof(caching_pg);
2012 }
2013
2014 static unsigned char ctrl_m_pg[] = {0xa, 10, 2, 0, 0, 0, 0, 0,
2015 0, 0, 0x2, 0x4b};
2016
2017 static int resp_ctrl_m_pg(unsigned char *p, int pcontrol, int target)
2018 { /* Control mode page for mode_sense */
2019 unsigned char ch_ctrl_m_pg[] = {/* 0xa, 10, */ 0x6, 0, 0, 0, 0, 0,
2020 0, 0, 0, 0};
2021 unsigned char d_ctrl_m_pg[] = {0xa, 10, 2, 0, 0, 0, 0, 0,
2022 0, 0, 0x2, 0x4b};
2023
2024 if (sdebug_dsense)
2025 ctrl_m_pg[2] |= 0x4;
2026 else
2027 ctrl_m_pg[2] &= ~0x4;
2028
2029 if (sdebug_ato)
2030 ctrl_m_pg[5] |= 0x80; /* ATO=1 */
2031
2032 memcpy(p, ctrl_m_pg, sizeof(ctrl_m_pg));
2033 if (1 == pcontrol)
2034 memcpy(p + 2, ch_ctrl_m_pg, sizeof(ch_ctrl_m_pg));
2035 else if (2 == pcontrol)
2036 memcpy(p, d_ctrl_m_pg, sizeof(d_ctrl_m_pg));
2037 return sizeof(ctrl_m_pg);
2038 }
2039
2040
2041 static int resp_iec_m_pg(unsigned char *p, int pcontrol, int target)
2042 { /* Informational Exceptions control mode page for mode_sense */
2043 unsigned char ch_iec_m_pg[] = {/* 0x1c, 0xa, */ 0x4, 0xf, 0, 0, 0, 0,
2044 0, 0, 0x0, 0x0};
2045 unsigned char d_iec_m_pg[] = {0x1c, 0xa, 0x08, 0, 0, 0, 0, 0,
2046 0, 0, 0x0, 0x0};
2047
2048 memcpy(p, iec_m_pg, sizeof(iec_m_pg));
2049 if (1 == pcontrol)
2050 memcpy(p + 2, ch_iec_m_pg, sizeof(ch_iec_m_pg));
2051 else if (2 == pcontrol)
2052 memcpy(p, d_iec_m_pg, sizeof(d_iec_m_pg));
2053 return sizeof(iec_m_pg);
2054 }
2055
2056 static int resp_sas_sf_m_pg(unsigned char *p, int pcontrol, int target)
2057 { /* SAS SSP mode page - short format for mode_sense */
2058 unsigned char sas_sf_m_pg[] = {0x19, 0x6,
2059 0x6, 0x0, 0x7, 0xd0, 0x0, 0x0};
2060
2061 memcpy(p, sas_sf_m_pg, sizeof(sas_sf_m_pg));
2062 if (1 == pcontrol)
2063 memset(p + 2, 0, sizeof(sas_sf_m_pg) - 2);
2064 return sizeof(sas_sf_m_pg);
2065 }
2066
2067
2068 static int resp_sas_pcd_m_spg(unsigned char *p, int pcontrol, int target,
2069 int target_dev_id)
2070 { /* SAS phy control and discover mode page for mode_sense */
2071 unsigned char sas_pcd_m_pg[] = {0x59, 0x1, 0, 0x64, 0, 0x6, 0, 2,
2072 0, 0, 0, 0, 0x10, 0x9, 0x8, 0x0,
2073 0, 0, 0, 0, 0, 0, 0, 0, /* insert SAS addr */
2074 0, 0, 0, 0, 0, 0, 0, 0, /* insert SAS addr */
2075 0x2, 0, 0, 0, 0, 0, 0, 0,
2076 0x88, 0x99, 0, 0, 0, 0, 0, 0,
2077 0, 0, 0, 0, 0, 0, 0, 0,
2078 0, 1, 0, 0, 0x10, 0x9, 0x8, 0x0,
2079 0, 0, 0, 0, 0, 0, 0, 0, /* insert SAS addr */
2080 0, 0, 0, 0, 0, 0, 0, 0, /* insert SAS addr */
2081 0x3, 0, 0, 0, 0, 0, 0, 0,
2082 0x88, 0x99, 0, 0, 0, 0, 0, 0,
2083 0, 0, 0, 0, 0, 0, 0, 0,
2084 };
2085 int port_a, port_b;
2086
2087 put_unaligned_be64(naa3_comp_a, sas_pcd_m_pg + 16);
2088 put_unaligned_be64(naa3_comp_c + 1, sas_pcd_m_pg + 24);
2089 put_unaligned_be64(naa3_comp_a, sas_pcd_m_pg + 64);
2090 put_unaligned_be64(naa3_comp_c + 1, sas_pcd_m_pg + 72);
2091 port_a = target_dev_id + 1;
2092 port_b = port_a + 1;
2093 memcpy(p, sas_pcd_m_pg, sizeof(sas_pcd_m_pg));
2094 put_unaligned_be32(port_a, p + 20);
2095 put_unaligned_be32(port_b, p + 48 + 20);
2096 if (1 == pcontrol)
2097 memset(p + 4, 0, sizeof(sas_pcd_m_pg) - 4);
2098 return sizeof(sas_pcd_m_pg);
2099 }
2100
2101 static int resp_sas_sha_m_spg(unsigned char *p, int pcontrol)
2102 { /* SAS SSP shared protocol specific port mode subpage */
2103 unsigned char sas_sha_m_pg[] = {0x59, 0x2, 0, 0xc, 0, 0x6, 0x10, 0,
2104 0, 0, 0, 0, 0, 0, 0, 0,
2105 };
2106
2107 memcpy(p, sas_sha_m_pg, sizeof(sas_sha_m_pg));
2108 if (1 == pcontrol)
2109 memset(p + 4, 0, sizeof(sas_sha_m_pg) - 4);
2110 return sizeof(sas_sha_m_pg);
2111 }
2112
2113 #define SDEBUG_MAX_MSENSE_SZ 256
2114
2115 static int resp_mode_sense(struct scsi_cmnd *scp,
2116 struct sdebug_dev_info *devip)
2117 {
2118 int pcontrol, pcode, subpcode, bd_len;
2119 unsigned char dev_spec;
2120 int alloc_len, offset, len, target_dev_id;
2121 int target = scp->device->id;
2122 unsigned char *ap;
2123 unsigned char arr[SDEBUG_MAX_MSENSE_SZ];
2124 unsigned char *cmd = scp->cmnd;
2125 bool dbd, llbaa, msense_6, is_disk, bad_pcode;
2126
2127 dbd = !!(cmd[1] & 0x8); /* disable block descriptors */
2128 pcontrol = (cmd[2] & 0xc0) >> 6;
2129 pcode = cmd[2] & 0x3f;
2130 subpcode = cmd[3];
2131 msense_6 = (MODE_SENSE == cmd[0]);
2132 llbaa = msense_6 ? false : !!(cmd[1] & 0x10);
2133 is_disk = (sdebug_ptype == TYPE_DISK);
2134 if (is_disk && !dbd)
2135 bd_len = llbaa ? 16 : 8;
2136 else
2137 bd_len = 0;
2138 alloc_len = msense_6 ? cmd[4] : get_unaligned_be16(cmd + 7);
2139 memset(arr, 0, SDEBUG_MAX_MSENSE_SZ);
2140 if (0x3 == pcontrol) { /* Saving values not supported */
2141 mk_sense_buffer(scp, ILLEGAL_REQUEST, SAVING_PARAMS_UNSUP, 0);
2142 return check_condition_result;
2143 }
2144 target_dev_id = ((devip->sdbg_host->shost->host_no + 1) * 2000) +
2145 (devip->target * 1000) - 3;
2146 /* for disks set DPOFUA bit and clear write protect (WP) bit */
2147 if (is_disk)
2148 dev_spec = 0x10; /* =0x90 if WP=1 implies read-only */
2149 else
2150 dev_spec = 0x0;
2151 if (msense_6) {
2152 arr[2] = dev_spec;
2153 arr[3] = bd_len;
2154 offset = 4;
2155 } else {
2156 arr[3] = dev_spec;
2157 if (16 == bd_len)
2158 arr[4] = 0x1; /* set LONGLBA bit */
2159 arr[7] = bd_len; /* assume 255 or less */
2160 offset = 8;
2161 }
2162 ap = arr + offset;
2163 if ((bd_len > 0) && (!sdebug_capacity))
2164 sdebug_capacity = get_sdebug_capacity();
2165
2166 if (8 == bd_len) {
2167 if (sdebug_capacity > 0xfffffffe)
2168 put_unaligned_be32(0xffffffff, ap + 0);
2169 else
2170 put_unaligned_be32(sdebug_capacity, ap + 0);
2171 put_unaligned_be16(sdebug_sector_size, ap + 6);
2172 offset += bd_len;
2173 ap = arr + offset;
2174 } else if (16 == bd_len) {
2175 put_unaligned_be64((u64)sdebug_capacity, ap + 0);
2176 put_unaligned_be32(sdebug_sector_size, ap + 12);
2177 offset += bd_len;
2178 ap = arr + offset;
2179 }
2180
2181 if ((subpcode > 0x0) && (subpcode < 0xff) && (0x19 != pcode)) {
2182 /* TODO: Control Extension page */
2183 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1);
2184 return check_condition_result;
2185 }
2186 bad_pcode = false;
2187
2188 switch (pcode) {
2189 case 0x1: /* Read-Write error recovery page, direct access */
2190 len = resp_err_recov_pg(ap, pcontrol, target);
2191 offset += len;
2192 break;
2193 case 0x2: /* Disconnect-Reconnect page, all devices */
2194 len = resp_disconnect_pg(ap, pcontrol, target);
2195 offset += len;
2196 break;
2197 case 0x3: /* Format device page, direct access */
2198 if (is_disk) {
2199 len = resp_format_pg(ap, pcontrol, target);
2200 offset += len;
2201 } else
2202 bad_pcode = true;
2203 break;
2204 case 0x8: /* Caching page, direct access */
2205 if (is_disk) {
2206 len = resp_caching_pg(ap, pcontrol, target);
2207 offset += len;
2208 } else
2209 bad_pcode = true;
2210 break;
2211 case 0xa: /* Control Mode page, all devices */
2212 len = resp_ctrl_m_pg(ap, pcontrol, target);
2213 offset += len;
2214 break;
2215 case 0x19: /* if spc==1 then sas phy, control+discover */
2216 if ((subpcode > 0x2) && (subpcode < 0xff)) {
2217 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1);
2218 return check_condition_result;
2219 }
2220 len = 0;
2221 if ((0x0 == subpcode) || (0xff == subpcode))
2222 len += resp_sas_sf_m_pg(ap + len, pcontrol, target);
2223 if ((0x1 == subpcode) || (0xff == subpcode))
2224 len += resp_sas_pcd_m_spg(ap + len, pcontrol, target,
2225 target_dev_id);
2226 if ((0x2 == subpcode) || (0xff == subpcode))
2227 len += resp_sas_sha_m_spg(ap + len, pcontrol);
2228 offset += len;
2229 break;
2230 case 0x1c: /* Informational Exceptions Mode page, all devices */
2231 len = resp_iec_m_pg(ap, pcontrol, target);
2232 offset += len;
2233 break;
2234 case 0x3f: /* Read all Mode pages */
2235 if ((0 == subpcode) || (0xff == subpcode)) {
2236 len = resp_err_recov_pg(ap, pcontrol, target);
2237 len += resp_disconnect_pg(ap + len, pcontrol, target);
2238 if (is_disk) {
2239 len += resp_format_pg(ap + len, pcontrol,
2240 target);
2241 len += resp_caching_pg(ap + len, pcontrol,
2242 target);
2243 }
2244 len += resp_ctrl_m_pg(ap + len, pcontrol, target);
2245 len += resp_sas_sf_m_pg(ap + len, pcontrol, target);
2246 if (0xff == subpcode) {
2247 len += resp_sas_pcd_m_spg(ap + len, pcontrol,
2248 target, target_dev_id);
2249 len += resp_sas_sha_m_spg(ap + len, pcontrol);
2250 }
2251 len += resp_iec_m_pg(ap + len, pcontrol, target);
2252 offset += len;
2253 } else {
2254 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1);
2255 return check_condition_result;
2256 }
2257 break;
2258 default:
2259 bad_pcode = true;
2260 break;
2261 }
2262 if (bad_pcode) {
2263 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 5);
2264 return check_condition_result;
2265 }
2266 if (msense_6)
2267 arr[0] = offset - 1;
2268 else
2269 put_unaligned_be16((offset - 2), arr + 0);
2270 return fill_from_dev_buffer(scp, arr, min(alloc_len, offset));
2271 }
2272
2273 #define SDEBUG_MAX_MSELECT_SZ 512
2274
2275 static int resp_mode_select(struct scsi_cmnd *scp,
2276 struct sdebug_dev_info *devip)
2277 {
2278 int pf, sp, ps, md_len, bd_len, off, spf, pg_len;
2279 int param_len, res, mpage;
2280 unsigned char arr[SDEBUG_MAX_MSELECT_SZ];
2281 unsigned char *cmd = scp->cmnd;
2282 int mselect6 = (MODE_SELECT == cmd[0]);
2283
2284 memset(arr, 0, sizeof(arr));
2285 pf = cmd[1] & 0x10;
2286 sp = cmd[1] & 0x1;
2287 param_len = mselect6 ? cmd[4] : get_unaligned_be16(cmd + 7);
2288 if ((0 == pf) || sp || (param_len > SDEBUG_MAX_MSELECT_SZ)) {
2289 mk_sense_invalid_fld(scp, SDEB_IN_CDB, mselect6 ? 4 : 7, -1);
2290 return check_condition_result;
2291 }
2292 res = fetch_to_dev_buffer(scp, arr, param_len);
2293 if (-1 == res)
2294 return DID_ERROR << 16;
2295 else if (sdebug_verbose && (res < param_len))
2296 sdev_printk(KERN_INFO, scp->device,
2297 "%s: cdb indicated=%d, IO sent=%d bytes\n",
2298 __func__, param_len, res);
2299 md_len = mselect6 ? (arr[0] + 1) : (get_unaligned_be16(arr + 0) + 2);
2300 bd_len = mselect6 ? arr[3] : get_unaligned_be16(arr + 6);
2301 if (md_len > 2) {
2302 mk_sense_invalid_fld(scp, SDEB_IN_DATA, 0, -1);
2303 return check_condition_result;
2304 }
2305 off = bd_len + (mselect6 ? 4 : 8);
2306 mpage = arr[off] & 0x3f;
2307 ps = !!(arr[off] & 0x80);
2308 if (ps) {
2309 mk_sense_invalid_fld(scp, SDEB_IN_DATA, off, 7);
2310 return check_condition_result;
2311 }
2312 spf = !!(arr[off] & 0x40);
2313 pg_len = spf ? (get_unaligned_be16(arr + off + 2) + 4) :
2314 (arr[off + 1] + 2);
2315 if ((pg_len + off) > param_len) {
2316 mk_sense_buffer(scp, ILLEGAL_REQUEST,
2317 PARAMETER_LIST_LENGTH_ERR, 0);
2318 return check_condition_result;
2319 }
2320 switch (mpage) {
2321 case 0x8: /* Caching Mode page */
2322 if (caching_pg[1] == arr[off + 1]) {
2323 memcpy(caching_pg + 2, arr + off + 2,
2324 sizeof(caching_pg) - 2);
2325 goto set_mode_changed_ua;
2326 }
2327 break;
2328 case 0xa: /* Control Mode page */
2329 if (ctrl_m_pg[1] == arr[off + 1]) {
2330 memcpy(ctrl_m_pg + 2, arr + off + 2,
2331 sizeof(ctrl_m_pg) - 2);
2332 sdebug_dsense = !!(ctrl_m_pg[2] & 0x4);
2333 goto set_mode_changed_ua;
2334 }
2335 break;
2336 case 0x1c: /* Informational Exceptions Mode page */
2337 if (iec_m_pg[1] == arr[off + 1]) {
2338 memcpy(iec_m_pg + 2, arr + off + 2,
2339 sizeof(iec_m_pg) - 2);
2340 goto set_mode_changed_ua;
2341 }
2342 break;
2343 default:
2344 break;
2345 }
2346 mk_sense_invalid_fld(scp, SDEB_IN_DATA, off, 5);
2347 return check_condition_result;
2348 set_mode_changed_ua:
2349 set_bit(SDEBUG_UA_MODE_CHANGED, devip->uas_bm);
2350 return 0;
2351 }
2352
2353 static int resp_temp_l_pg(unsigned char *arr)
2354 {
2355 unsigned char temp_l_pg[] = {0x0, 0x0, 0x3, 0x2, 0x0, 38,
2356 0x0, 0x1, 0x3, 0x2, 0x0, 65,
2357 };
2358
2359 memcpy(arr, temp_l_pg, sizeof(temp_l_pg));
2360 return sizeof(temp_l_pg);
2361 }
2362
2363 static int resp_ie_l_pg(unsigned char *arr)
2364 {
2365 unsigned char ie_l_pg[] = {0x0, 0x0, 0x3, 0x3, 0x0, 0x0, 38,
2366 };
2367
2368 memcpy(arr, ie_l_pg, sizeof(ie_l_pg));
2369 if (iec_m_pg[2] & 0x4) { /* TEST bit set */
2370 arr[4] = THRESHOLD_EXCEEDED;
2371 arr[5] = 0xff;
2372 }
2373 return sizeof(ie_l_pg);
2374 }
2375
2376 #define SDEBUG_MAX_LSENSE_SZ 512
2377
2378 static int resp_log_sense(struct scsi_cmnd *scp,
2379 struct sdebug_dev_info *devip)
2380 {
2381 int ppc, sp, pcode, subpcode, alloc_len, len, n;
2382 unsigned char arr[SDEBUG_MAX_LSENSE_SZ];
2383 unsigned char *cmd = scp->cmnd;
2384
2385 memset(arr, 0, sizeof(arr));
2386 ppc = cmd[1] & 0x2;
2387 sp = cmd[1] & 0x1;
2388 if (ppc || sp) {
2389 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, ppc ? 1 : 0);
2390 return check_condition_result;
2391 }
2392 pcode = cmd[2] & 0x3f;
2393 subpcode = cmd[3] & 0xff;
2394 alloc_len = get_unaligned_be16(cmd + 7);
2395 arr[0] = pcode;
2396 if (0 == subpcode) {
2397 switch (pcode) {
2398 case 0x0: /* Supported log pages log page */
2399 n = 4;
2400 arr[n++] = 0x0; /* this page */
2401 arr[n++] = 0xd; /* Temperature */
2402 arr[n++] = 0x2f; /* Informational exceptions */
2403 arr[3] = n - 4;
2404 break;
2405 case 0xd: /* Temperature log page */
2406 arr[3] = resp_temp_l_pg(arr + 4);
2407 break;
2408 case 0x2f: /* Informational exceptions log page */
2409 arr[3] = resp_ie_l_pg(arr + 4);
2410 break;
2411 default:
2412 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 5);
2413 return check_condition_result;
2414 }
2415 } else if (0xff == subpcode) {
2416 arr[0] |= 0x40;
2417 arr[1] = subpcode;
2418 switch (pcode) {
2419 case 0x0: /* Supported log pages and subpages log page */
2420 n = 4;
2421 arr[n++] = 0x0;
2422 arr[n++] = 0x0; /* 0,0 page */
2423 arr[n++] = 0x0;
2424 arr[n++] = 0xff; /* this page */
2425 arr[n++] = 0xd;
2426 arr[n++] = 0x0; /* Temperature */
2427 arr[n++] = 0x2f;
2428 arr[n++] = 0x0; /* Informational exceptions */
2429 arr[3] = n - 4;
2430 break;
2431 case 0xd: /* Temperature subpages */
2432 n = 4;
2433 arr[n++] = 0xd;
2434 arr[n++] = 0x0; /* Temperature */
2435 arr[3] = n - 4;
2436 break;
2437 case 0x2f: /* Informational exceptions subpages */
2438 n = 4;
2439 arr[n++] = 0x2f;
2440 arr[n++] = 0x0; /* Informational exceptions */
2441 arr[3] = n - 4;
2442 break;
2443 default:
2444 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 5);
2445 return check_condition_result;
2446 }
2447 } else {
2448 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1);
2449 return check_condition_result;
2450 }
2451 len = min(get_unaligned_be16(arr + 2) + 4, alloc_len);
2452 return fill_from_dev_buffer(scp, arr,
2453 min(len, SDEBUG_MAX_INQ_ARR_SZ));
2454 }
2455
2456 static int check_device_access_params(struct scsi_cmnd *scp,
2457 unsigned long long lba, unsigned int num)
2458 {
2459 if (lba + num > sdebug_capacity) {
2460 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
2461 return check_condition_result;
2462 }
2463 /* transfer length excessive (tie in to block limits VPD page) */
2464 if (num > sdebug_store_sectors) {
2465 /* needs work to find which cdb byte 'num' comes from */
2466 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
2467 return check_condition_result;
2468 }
2469 return 0;
2470 }
2471
2472 /* Returns number of bytes copied or -1 if error. */
2473 static int do_device_access(struct scsi_cmnd *scmd, u32 sg_skip, u64 lba,
2474 u32 num, bool do_write)
2475 {
2476 int ret;
2477 u64 block, rest = 0;
2478 struct scsi_data_buffer *sdb;
2479 enum dma_data_direction dir;
2480
2481 if (do_write) {
2482 sdb = scsi_out(scmd);
2483 dir = DMA_TO_DEVICE;
2484 write_since_sync = true;
2485 } else {
2486 sdb = scsi_in(scmd);
2487 dir = DMA_FROM_DEVICE;
2488 }
2489
2490 if (!sdb->length)
2491 return 0;
2492 if (!(scsi_bidi_cmnd(scmd) || scmd->sc_data_direction == dir))
2493 return -1;
2494
2495 block = do_div(lba, sdebug_store_sectors);
2496 if (block + num > sdebug_store_sectors)
2497 rest = block + num - sdebug_store_sectors;
2498
2499 ret = sg_copy_buffer(sdb->table.sgl, sdb->table.nents,
2500 fake_storep + (block * sdebug_sector_size),
2501 (num - rest) * sdebug_sector_size, sg_skip, do_write);
2502 if (ret != (num - rest) * sdebug_sector_size)
2503 return ret;
2504
2505 if (rest) {
2506 ret += sg_copy_buffer(sdb->table.sgl, sdb->table.nents,
2507 fake_storep, rest * sdebug_sector_size,
2508 sg_skip + ((num - rest) * sdebug_sector_size),
2509 do_write);
2510 }
2511
2512 return ret;
2513 }
2514
2515 /* If fake_store(lba,num) compares equal to arr(num), then copy top half of
2516 * arr into fake_store(lba,num) and return true. If comparison fails then
2517 * return false. */
2518 static bool comp_write_worker(u64 lba, u32 num, const u8 *arr)
2519 {
2520 bool res;
2521 u64 block, rest = 0;
2522 u32 store_blks = sdebug_store_sectors;
2523 u32 lb_size = sdebug_sector_size;
2524
2525 block = do_div(lba, store_blks);
2526 if (block + num > store_blks)
2527 rest = block + num - store_blks;
2528
2529 res = !memcmp(fake_storep + (block * lb_size), arr,
2530 (num - rest) * lb_size);
2531 if (!res)
2532 return res;
2533 if (rest)
2534 res = memcmp(fake_storep, arr + ((num - rest) * lb_size),
2535 rest * lb_size);
2536 if (!res)
2537 return res;
2538 arr += num * lb_size;
2539 memcpy(fake_storep + (block * lb_size), arr, (num - rest) * lb_size);
2540 if (rest)
2541 memcpy(fake_storep, arr + ((num - rest) * lb_size),
2542 rest * lb_size);
2543 return res;
2544 }
2545
2546 static __be16 dif_compute_csum(const void *buf, int len)
2547 {
2548 __be16 csum;
2549
2550 if (sdebug_guard)
2551 csum = (__force __be16)ip_compute_csum(buf, len);
2552 else
2553 csum = cpu_to_be16(crc_t10dif(buf, len));
2554
2555 return csum;
2556 }
2557
2558 static int dif_verify(struct t10_pi_tuple *sdt, const void *data,
2559 sector_t sector, u32 ei_lba)
2560 {
2561 __be16 csum = dif_compute_csum(data, sdebug_sector_size);
2562
2563 if (sdt->guard_tag != csum) {
2564 pr_err("GUARD check failed on sector %lu rcvd 0x%04x, data 0x%04x\n",
2565 (unsigned long)sector,
2566 be16_to_cpu(sdt->guard_tag),
2567 be16_to_cpu(csum));
2568 return 0x01;
2569 }
2570 if (sdebug_dif == T10_PI_TYPE1_PROTECTION &&
2571 be32_to_cpu(sdt->ref_tag) != (sector & 0xffffffff)) {
2572 pr_err("REF check failed on sector %lu\n",
2573 (unsigned long)sector);
2574 return 0x03;
2575 }
2576 if (sdebug_dif == T10_PI_TYPE2_PROTECTION &&
2577 be32_to_cpu(sdt->ref_tag) != ei_lba) {
2578 pr_err("REF check failed on sector %lu\n",
2579 (unsigned long)sector);
2580 return 0x03;
2581 }
2582 return 0;
2583 }
2584
2585 static void dif_copy_prot(struct scsi_cmnd *SCpnt, sector_t sector,
2586 unsigned int sectors, bool read)
2587 {
2588 size_t resid;
2589 void *paddr;
2590 const void *dif_store_end = dif_storep + sdebug_store_sectors;
2591 struct sg_mapping_iter miter;
2592
2593 /* Bytes of protection data to copy into sgl */
2594 resid = sectors * sizeof(*dif_storep);
2595
2596 sg_miter_start(&miter, scsi_prot_sglist(SCpnt),
2597 scsi_prot_sg_count(SCpnt), SG_MITER_ATOMIC |
2598 (read ? SG_MITER_TO_SG : SG_MITER_FROM_SG));
2599
2600 while (sg_miter_next(&miter) && resid > 0) {
2601 size_t len = min(miter.length, resid);
2602 void *start = dif_store(sector);
2603 size_t rest = 0;
2604
2605 if (dif_store_end < start + len)
2606 rest = start + len - dif_store_end;
2607
2608 paddr = miter.addr;
2609
2610 if (read)
2611 memcpy(paddr, start, len - rest);
2612 else
2613 memcpy(start, paddr, len - rest);
2614
2615 if (rest) {
2616 if (read)
2617 memcpy(paddr + len - rest, dif_storep, rest);
2618 else
2619 memcpy(dif_storep, paddr + len - rest, rest);
2620 }
2621
2622 sector += len / sizeof(*dif_storep);
2623 resid -= len;
2624 }
2625 sg_miter_stop(&miter);
2626 }
2627
2628 static int prot_verify_read(struct scsi_cmnd *SCpnt, sector_t start_sec,
2629 unsigned int sectors, u32 ei_lba)
2630 {
2631 unsigned int i;
2632 struct t10_pi_tuple *sdt;
2633 sector_t sector;
2634
2635 for (i = 0; i < sectors; i++, ei_lba++) {
2636 int ret;
2637
2638 sector = start_sec + i;
2639 sdt = dif_store(sector);
2640
2641 if (sdt->app_tag == cpu_to_be16(0xffff))
2642 continue;
2643
2644 ret = dif_verify(sdt, fake_store(sector), sector, ei_lba);
2645 if (ret) {
2646 dif_errors++;
2647 return ret;
2648 }
2649 }
2650
2651 dif_copy_prot(SCpnt, start_sec, sectors, true);
2652 dix_reads++;
2653
2654 return 0;
2655 }
2656
2657 static int resp_read_dt0(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
2658 {
2659 u8 *cmd = scp->cmnd;
2660 struct sdebug_queued_cmd *sqcp;
2661 u64 lba;
2662 u32 num;
2663 u32 ei_lba;
2664 unsigned long iflags;
2665 int ret;
2666 bool check_prot;
2667
2668 switch (cmd[0]) {
2669 case READ_16:
2670 ei_lba = 0;
2671 lba = get_unaligned_be64(cmd + 2);
2672 num = get_unaligned_be32(cmd + 10);
2673 check_prot = true;
2674 break;
2675 case READ_10:
2676 ei_lba = 0;
2677 lba = get_unaligned_be32(cmd + 2);
2678 num = get_unaligned_be16(cmd + 7);
2679 check_prot = true;
2680 break;
2681 case READ_6:
2682 ei_lba = 0;
2683 lba = (u32)cmd[3] | (u32)cmd[2] << 8 |
2684 (u32)(cmd[1] & 0x1f) << 16;
2685 num = (0 == cmd[4]) ? 256 : cmd[4];
2686 check_prot = true;
2687 break;
2688 case READ_12:
2689 ei_lba = 0;
2690 lba = get_unaligned_be32(cmd + 2);
2691 num = get_unaligned_be32(cmd + 6);
2692 check_prot = true;
2693 break;
2694 case XDWRITEREAD_10:
2695 ei_lba = 0;
2696 lba = get_unaligned_be32(cmd + 2);
2697 num = get_unaligned_be16(cmd + 7);
2698 check_prot = false;
2699 break;
2700 default: /* assume READ(32) */
2701 lba = get_unaligned_be64(cmd + 12);
2702 ei_lba = get_unaligned_be32(cmd + 20);
2703 num = get_unaligned_be32(cmd + 28);
2704 check_prot = false;
2705 break;
2706 }
2707 if (unlikely(have_dif_prot && check_prot)) {
2708 if (sdebug_dif == T10_PI_TYPE2_PROTECTION &&
2709 (cmd[1] & 0xe0)) {
2710 mk_sense_invalid_opcode(scp);
2711 return check_condition_result;
2712 }
2713 if ((sdebug_dif == T10_PI_TYPE1_PROTECTION ||
2714 sdebug_dif == T10_PI_TYPE3_PROTECTION) &&
2715 (cmd[1] & 0xe0) == 0)
2716 sdev_printk(KERN_ERR, scp->device, "Unprotected RD "
2717 "to DIF device\n");
2718 }
2719 if (unlikely(sdebug_any_injecting_opt)) {
2720 sqcp = (struct sdebug_queued_cmd *)scp->host_scribble;
2721
2722 if (sqcp) {
2723 if (sqcp->inj_short)
2724 num /= 2;
2725 }
2726 } else
2727 sqcp = NULL;
2728
2729 /* inline check_device_access_params() */
2730 if (unlikely(lba + num > sdebug_capacity)) {
2731 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
2732 return check_condition_result;
2733 }
2734 /* transfer length excessive (tie in to block limits VPD page) */
2735 if (unlikely(num > sdebug_store_sectors)) {
2736 /* needs work to find which cdb byte 'num' comes from */
2737 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
2738 return check_condition_result;
2739 }
2740
2741 if (unlikely((SDEBUG_OPT_MEDIUM_ERR & sdebug_opts) &&
2742 (lba <= (sdebug_medium_error_start + sdebug_medium_error_count - 1)) &&
2743 ((lba + num) > sdebug_medium_error_start))) {
2744 /* claim unrecoverable read error */
2745 mk_sense_buffer(scp, MEDIUM_ERROR, UNRECOVERED_READ_ERR, 0);
2746 /* set info field and valid bit for fixed descriptor */
2747 if (0x70 == (scp->sense_buffer[0] & 0x7f)) {
2748 scp->sense_buffer[0] |= 0x80; /* Valid bit */
2749 ret = (lba < OPT_MEDIUM_ERR_ADDR)
2750 ? OPT_MEDIUM_ERR_ADDR : (int)lba;
2751 put_unaligned_be32(ret, scp->sense_buffer + 3);
2752 }
2753 scsi_set_resid(scp, scsi_bufflen(scp));
2754 return check_condition_result;
2755 }
2756
2757 read_lock_irqsave(&atomic_rw, iflags);
2758
2759 /* DIX + T10 DIF */
2760 if (unlikely(sdebug_dix && scsi_prot_sg_count(scp))) {
2761 int prot_ret = prot_verify_read(scp, lba, num, ei_lba);
2762
2763 if (prot_ret) {
2764 read_unlock_irqrestore(&atomic_rw, iflags);
2765 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, prot_ret);
2766 return illegal_condition_result;
2767 }
2768 }
2769
2770 ret = do_device_access(scp, 0, lba, num, false);
2771 read_unlock_irqrestore(&atomic_rw, iflags);
2772 if (unlikely(ret == -1))
2773 return DID_ERROR << 16;
2774
2775 scsi_in(scp)->resid = scsi_bufflen(scp) - ret;
2776
2777 if (unlikely(sqcp)) {
2778 if (sqcp->inj_recovered) {
2779 mk_sense_buffer(scp, RECOVERED_ERROR,
2780 THRESHOLD_EXCEEDED, 0);
2781 return check_condition_result;
2782 } else if (sqcp->inj_transport) {
2783 mk_sense_buffer(scp, ABORTED_COMMAND,
2784 TRANSPORT_PROBLEM, ACK_NAK_TO);
2785 return check_condition_result;
2786 } else if (sqcp->inj_dif) {
2787 /* Logical block guard check failed */
2788 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 1);
2789 return illegal_condition_result;
2790 } else if (sqcp->inj_dix) {
2791 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 1);
2792 return illegal_condition_result;
2793 }
2794 }
2795 return 0;
2796 }
2797
2798 static void dump_sector(unsigned char *buf, int len)
2799 {
2800 int i, j, n;
2801
2802 pr_err(">>> Sector Dump <<<\n");
2803 for (i = 0 ; i < len ; i += 16) {
2804 char b[128];
2805
2806 for (j = 0, n = 0; j < 16; j++) {
2807 unsigned char c = buf[i+j];
2808
2809 if (c >= 0x20 && c < 0x7e)
2810 n += scnprintf(b + n, sizeof(b) - n,
2811 " %c ", buf[i+j]);
2812 else
2813 n += scnprintf(b + n, sizeof(b) - n,
2814 "%02x ", buf[i+j]);
2815 }
2816 pr_err("%04d: %s\n", i, b);
2817 }
2818 }
2819
2820 static int prot_verify_write(struct scsi_cmnd *SCpnt, sector_t start_sec,
2821 unsigned int sectors, u32 ei_lba)
2822 {
2823 int ret;
2824 struct t10_pi_tuple *sdt;
2825 void *daddr;
2826 sector_t sector = start_sec;
2827 int ppage_offset;
2828 int dpage_offset;
2829 struct sg_mapping_iter diter;
2830 struct sg_mapping_iter piter;
2831
2832 BUG_ON(scsi_sg_count(SCpnt) == 0);
2833 BUG_ON(scsi_prot_sg_count(SCpnt) == 0);
2834
2835 sg_miter_start(&piter, scsi_prot_sglist(SCpnt),
2836 scsi_prot_sg_count(SCpnt),
2837 SG_MITER_ATOMIC | SG_MITER_FROM_SG);
2838 sg_miter_start(&diter, scsi_sglist(SCpnt), scsi_sg_count(SCpnt),
2839 SG_MITER_ATOMIC | SG_MITER_FROM_SG);
2840
2841 /* For each protection page */
2842 while (sg_miter_next(&piter)) {
2843 dpage_offset = 0;
2844 if (WARN_ON(!sg_miter_next(&diter))) {
2845 ret = 0x01;
2846 goto out;
2847 }
2848
2849 for (ppage_offset = 0; ppage_offset < piter.length;
2850 ppage_offset += sizeof(struct t10_pi_tuple)) {
2851 /* If we're at the end of the current
2852 * data page advance to the next one
2853 */
2854 if (dpage_offset >= diter.length) {
2855 if (WARN_ON(!sg_miter_next(&diter))) {
2856 ret = 0x01;
2857 goto out;
2858 }
2859 dpage_offset = 0;
2860 }
2861
2862 sdt = piter.addr + ppage_offset;
2863 daddr = diter.addr + dpage_offset;
2864
2865 ret = dif_verify(sdt, daddr, sector, ei_lba);
2866 if (ret) {
2867 dump_sector(daddr, sdebug_sector_size);
2868 goto out;
2869 }
2870
2871 sector++;
2872 ei_lba++;
2873 dpage_offset += sdebug_sector_size;
2874 }
2875 diter.consumed = dpage_offset;
2876 sg_miter_stop(&diter);
2877 }
2878 sg_miter_stop(&piter);
2879
2880 dif_copy_prot(SCpnt, start_sec, sectors, false);
2881 dix_writes++;
2882
2883 return 0;
2884
2885 out:
2886 dif_errors++;
2887 sg_miter_stop(&diter);
2888 sg_miter_stop(&piter);
2889 return ret;
2890 }
2891
2892 static unsigned long lba_to_map_index(sector_t lba)
2893 {
2894 if (sdebug_unmap_alignment)
2895 lba += sdebug_unmap_granularity - sdebug_unmap_alignment;
2896 sector_div(lba, sdebug_unmap_granularity);
2897 return lba;
2898 }
2899
2900 static sector_t map_index_to_lba(unsigned long index)
2901 {
2902 sector_t lba = index * sdebug_unmap_granularity;
2903
2904 if (sdebug_unmap_alignment)
2905 lba -= sdebug_unmap_granularity - sdebug_unmap_alignment;
2906 return lba;
2907 }
2908
2909 static unsigned int map_state(sector_t lba, unsigned int *num)
2910 {
2911 sector_t end;
2912 unsigned int mapped;
2913 unsigned long index;
2914 unsigned long next;
2915
2916 index = lba_to_map_index(lba);
2917 mapped = test_bit(index, map_storep);
2918
2919 if (mapped)
2920 next = find_next_zero_bit(map_storep, map_size, index);
2921 else
2922 next = find_next_bit(map_storep, map_size, index);
2923
2924 end = min_t(sector_t, sdebug_store_sectors, map_index_to_lba(next));
2925 *num = end - lba;
2926 return mapped;
2927 }
2928
2929 static void map_region(sector_t lba, unsigned int len)
2930 {
2931 sector_t end = lba + len;
2932
2933 while (lba < end) {
2934 unsigned long index = lba_to_map_index(lba);
2935
2936 if (index < map_size)
2937 set_bit(index, map_storep);
2938
2939 lba = map_index_to_lba(index + 1);
2940 }
2941 }
2942
2943 static void unmap_region(sector_t lba, unsigned int len)
2944 {
2945 sector_t end = lba + len;
2946
2947 while (lba < end) {
2948 unsigned long index = lba_to_map_index(lba);
2949
2950 if (lba == map_index_to_lba(index) &&
2951 lba + sdebug_unmap_granularity <= end &&
2952 index < map_size) {
2953 clear_bit(index, map_storep);
2954 if (sdebug_lbprz) { /* for LBPRZ=2 return 0xff_s */
2955 memset(fake_storep +
2956 lba * sdebug_sector_size,
2957 (sdebug_lbprz & 1) ? 0 : 0xff,
2958 sdebug_sector_size *
2959 sdebug_unmap_granularity);
2960 }
2961 if (dif_storep) {
2962 memset(dif_storep + lba, 0xff,
2963 sizeof(*dif_storep) *
2964 sdebug_unmap_granularity);
2965 }
2966 }
2967 lba = map_index_to_lba(index + 1);
2968 }
2969 }
2970
2971 static int resp_write_dt0(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
2972 {
2973 u8 *cmd = scp->cmnd;
2974 u64 lba;
2975 u32 num;
2976 u32 ei_lba;
2977 unsigned long iflags;
2978 int ret;
2979 bool check_prot;
2980
2981 switch (cmd[0]) {
2982 case WRITE_16:
2983 ei_lba = 0;
2984 lba = get_unaligned_be64(cmd + 2);
2985 num = get_unaligned_be32(cmd + 10);
2986 check_prot = true;
2987 break;
2988 case WRITE_10:
2989 ei_lba = 0;
2990 lba = get_unaligned_be32(cmd + 2);
2991 num = get_unaligned_be16(cmd + 7);
2992 check_prot = true;
2993 break;
2994 case WRITE_6:
2995 ei_lba = 0;
2996 lba = (u32)cmd[3] | (u32)cmd[2] << 8 |
2997 (u32)(cmd[1] & 0x1f) << 16;
2998 num = (0 == cmd[4]) ? 256 : cmd[4];
2999 check_prot = true;
3000 break;
3001 case WRITE_12:
3002 ei_lba = 0;
3003 lba = get_unaligned_be32(cmd + 2);
3004 num = get_unaligned_be32(cmd + 6);
3005 check_prot = true;
3006 break;
3007 case 0x53: /* XDWRITEREAD(10) */
3008 ei_lba = 0;
3009 lba = get_unaligned_be32(cmd + 2);
3010 num = get_unaligned_be16(cmd + 7);
3011 check_prot = false;
3012 break;
3013 default: /* assume WRITE(32) */
3014 lba = get_unaligned_be64(cmd + 12);
3015 ei_lba = get_unaligned_be32(cmd + 20);
3016 num = get_unaligned_be32(cmd + 28);
3017 check_prot = false;
3018 break;
3019 }
3020 if (unlikely(have_dif_prot && check_prot)) {
3021 if (sdebug_dif == T10_PI_TYPE2_PROTECTION &&
3022 (cmd[1] & 0xe0)) {
3023 mk_sense_invalid_opcode(scp);
3024 return check_condition_result;
3025 }
3026 if ((sdebug_dif == T10_PI_TYPE1_PROTECTION ||
3027 sdebug_dif == T10_PI_TYPE3_PROTECTION) &&
3028 (cmd[1] & 0xe0) == 0)
3029 sdev_printk(KERN_ERR, scp->device, "Unprotected WR "
3030 "to DIF device\n");
3031 }
3032
3033 /* inline check_device_access_params() */
3034 if (unlikely(lba + num > sdebug_capacity)) {
3035 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
3036 return check_condition_result;
3037 }
3038 /* transfer length excessive (tie in to block limits VPD page) */
3039 if (unlikely(num > sdebug_store_sectors)) {
3040 /* needs work to find which cdb byte 'num' comes from */
3041 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
3042 return check_condition_result;
3043 }
3044
3045 write_lock_irqsave(&atomic_rw, iflags);
3046
3047 /* DIX + T10 DIF */
3048 if (unlikely(sdebug_dix && scsi_prot_sg_count(scp))) {
3049 int prot_ret = prot_verify_write(scp, lba, num, ei_lba);
3050
3051 if (prot_ret) {
3052 write_unlock_irqrestore(&atomic_rw, iflags);
3053 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, prot_ret);
3054 return illegal_condition_result;
3055 }
3056 }
3057
3058 ret = do_device_access(scp, 0, lba, num, true);
3059 if (unlikely(scsi_debug_lbp()))
3060 map_region(lba, num);
3061 write_unlock_irqrestore(&atomic_rw, iflags);
3062 if (unlikely(-1 == ret))
3063 return DID_ERROR << 16;
3064 else if (unlikely(sdebug_verbose &&
3065 (ret < (num * sdebug_sector_size))))
3066 sdev_printk(KERN_INFO, scp->device,
3067 "%s: write: cdb indicated=%u, IO sent=%d bytes\n",
3068 my_name, num * sdebug_sector_size, ret);
3069
3070 if (unlikely(sdebug_any_injecting_opt)) {
3071 struct sdebug_queued_cmd *sqcp =
3072 (struct sdebug_queued_cmd *)scp->host_scribble;
3073
3074 if (sqcp) {
3075 if (sqcp->inj_recovered) {
3076 mk_sense_buffer(scp, RECOVERED_ERROR,
3077 THRESHOLD_EXCEEDED, 0);
3078 return check_condition_result;
3079 } else if (sqcp->inj_dif) {
3080 /* Logical block guard check failed */
3081 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 1);
3082 return illegal_condition_result;
3083 } else if (sqcp->inj_dix) {
3084 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 1);
3085 return illegal_condition_result;
3086 }
3087 }
3088 }
3089 return 0;
3090 }
3091
3092 /*
3093 * T10 has only specified WRITE SCATTERED(16) and WRITE SCATTERED(32).
3094 * No READ GATHERED yet (requires bidi or long cdb holding gather list).
3095 */
3096 static int resp_write_scat(struct scsi_cmnd *scp,
3097 struct sdebug_dev_info *devip)
3098 {
3099 u8 *cmd = scp->cmnd;
3100 u8 *lrdp = NULL;
3101 u8 *up;
3102 u8 wrprotect;
3103 u16 lbdof, num_lrd, k;
3104 u32 num, num_by, bt_len, lbdof_blen, sg_off, cum_lb;
3105 u32 lb_size = sdebug_sector_size;
3106 u32 ei_lba;
3107 u64 lba;
3108 unsigned long iflags;
3109 int ret, res;
3110 bool is_16;
3111 static const u32 lrd_size = 32; /* + parameter list header size */
3112
3113 if (cmd[0] == VARIABLE_LENGTH_CMD) {
3114 is_16 = false;
3115 wrprotect = (cmd[10] >> 5) & 0x7;
3116 lbdof = get_unaligned_be16(cmd + 12);
3117 num_lrd = get_unaligned_be16(cmd + 16);
3118 bt_len = get_unaligned_be32(cmd + 28);
3119 } else { /* that leaves WRITE SCATTERED(16) */
3120 is_16 = true;
3121 wrprotect = (cmd[2] >> 5) & 0x7;
3122 lbdof = get_unaligned_be16(cmd + 4);
3123 num_lrd = get_unaligned_be16(cmd + 8);
3124 bt_len = get_unaligned_be32(cmd + 10);
3125 if (unlikely(have_dif_prot)) {
3126 if (sdebug_dif == T10_PI_TYPE2_PROTECTION &&
3127 wrprotect) {
3128 mk_sense_invalid_opcode(scp);
3129 return illegal_condition_result;
3130 }
3131 if ((sdebug_dif == T10_PI_TYPE1_PROTECTION ||
3132 sdebug_dif == T10_PI_TYPE3_PROTECTION) &&
3133 wrprotect == 0)
3134 sdev_printk(KERN_ERR, scp->device,
3135 "Unprotected WR to DIF device\n");
3136 }
3137 }
3138 if ((num_lrd == 0) || (bt_len == 0))
3139 return 0; /* T10 says these do-nothings are not errors */
3140 if (lbdof == 0) {
3141 if (sdebug_verbose)
3142 sdev_printk(KERN_INFO, scp->device,
3143 "%s: %s: LB Data Offset field bad\n",
3144 my_name, __func__);
3145 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
3146 return illegal_condition_result;
3147 }
3148 lbdof_blen = lbdof * lb_size;
3149 if ((lrd_size + (num_lrd * lrd_size)) > lbdof_blen) {
3150 if (sdebug_verbose)
3151 sdev_printk(KERN_INFO, scp->device,
3152 "%s: %s: LBA range descriptors don't fit\n",
3153 my_name, __func__);
3154 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
3155 return illegal_condition_result;
3156 }
3157 lrdp = kzalloc(lbdof_blen, GFP_ATOMIC);
3158 if (lrdp == NULL)
3159 return SCSI_MLQUEUE_HOST_BUSY;
3160 if (sdebug_verbose)
3161 sdev_printk(KERN_INFO, scp->device,
3162 "%s: %s: Fetch header+scatter_list, lbdof_blen=%u\n",
3163 my_name, __func__, lbdof_blen);
3164 res = fetch_to_dev_buffer(scp, lrdp, lbdof_blen);
3165 if (res == -1) {
3166 ret = DID_ERROR << 16;
3167 goto err_out;
3168 }
3169
3170 write_lock_irqsave(&atomic_rw, iflags);
3171 sg_off = lbdof_blen;
3172 /* Spec says Buffer xfer Length field in number of LBs in dout */
3173 cum_lb = 0;
3174 for (k = 0, up = lrdp + lrd_size; k < num_lrd; ++k, up += lrd_size) {
3175 lba = get_unaligned_be64(up + 0);
3176 num = get_unaligned_be32(up + 8);
3177 if (sdebug_verbose)
3178 sdev_printk(KERN_INFO, scp->device,
3179 "%s: %s: k=%d LBA=0x%llx num=%u sg_off=%u\n",
3180 my_name, __func__, k, lba, num, sg_off);
3181 if (num == 0)
3182 continue;
3183 ret = check_device_access_params(scp, lba, num);
3184 if (ret)
3185 goto err_out_unlock;
3186 num_by = num * lb_size;
3187 ei_lba = is_16 ? 0 : get_unaligned_be32(up + 12);
3188
3189 if ((cum_lb + num) > bt_len) {
3190 if (sdebug_verbose)
3191 sdev_printk(KERN_INFO, scp->device,
3192 "%s: %s: sum of blocks > data provided\n",
3193 my_name, __func__);
3194 mk_sense_buffer(scp, ILLEGAL_REQUEST, WRITE_ERROR_ASC,
3195 0);
3196 ret = illegal_condition_result;
3197 goto err_out_unlock;
3198 }
3199
3200 /* DIX + T10 DIF */
3201 if (unlikely(sdebug_dix && scsi_prot_sg_count(scp))) {
3202 int prot_ret = prot_verify_write(scp, lba, num,
3203 ei_lba);
3204
3205 if (prot_ret) {
3206 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10,
3207 prot_ret);
3208 ret = illegal_condition_result;
3209 goto err_out_unlock;
3210 }
3211 }
3212
3213 ret = do_device_access(scp, sg_off, lba, num, true);
3214 if (unlikely(scsi_debug_lbp()))
3215 map_region(lba, num);
3216 if (unlikely(-1 == ret)) {
3217 ret = DID_ERROR << 16;
3218 goto err_out_unlock;
3219 } else if (unlikely(sdebug_verbose && (ret < num_by)))
3220 sdev_printk(KERN_INFO, scp->device,
3221 "%s: write: cdb indicated=%u, IO sent=%d bytes\n",
3222 my_name, num_by, ret);
3223
3224 if (unlikely(sdebug_any_injecting_opt)) {
3225 struct sdebug_queued_cmd *sqcp =
3226 (struct sdebug_queued_cmd *)scp->host_scribble;
3227
3228 if (sqcp) {
3229 if (sqcp->inj_recovered) {
3230 mk_sense_buffer(scp, RECOVERED_ERROR,
3231 THRESHOLD_EXCEEDED, 0);
3232 ret = illegal_condition_result;
3233 goto err_out_unlock;
3234 } else if (sqcp->inj_dif) {
3235 /* Logical block guard check failed */
3236 mk_sense_buffer(scp, ABORTED_COMMAND,
3237 0x10, 1);
3238 ret = illegal_condition_result;
3239 goto err_out_unlock;
3240 } else if (sqcp->inj_dix) {
3241 mk_sense_buffer(scp, ILLEGAL_REQUEST,
3242 0x10, 1);
3243 ret = illegal_condition_result;
3244 goto err_out_unlock;
3245 }
3246 }
3247 }
3248 sg_off += num_by;
3249 cum_lb += num;
3250 }
3251 ret = 0;
3252 err_out_unlock:
3253 write_unlock_irqrestore(&atomic_rw, iflags);
3254 err_out:
3255 kfree(lrdp);
3256 return ret;
3257 }
3258
3259 static int resp_write_same(struct scsi_cmnd *scp, u64 lba, u32 num,
3260 u32 ei_lba, bool unmap, bool ndob)
3261 {
3262 unsigned long iflags;
3263 unsigned long long i;
3264 int ret;
3265 u64 lba_off;
3266
3267 ret = check_device_access_params(scp, lba, num);
3268 if (ret)
3269 return ret;
3270
3271 write_lock_irqsave(&atomic_rw, iflags);
3272
3273 if (unmap && scsi_debug_lbp()) {
3274 unmap_region(lba, num);
3275 goto out;
3276 }
3277
3278 lba_off = lba * sdebug_sector_size;
3279 /* if ndob then zero 1 logical block, else fetch 1 logical block */
3280 if (ndob) {
3281 memset(fake_storep + lba_off, 0, sdebug_sector_size);
3282 ret = 0;
3283 } else
3284 ret = fetch_to_dev_buffer(scp, fake_storep + lba_off,
3285 sdebug_sector_size);
3286
3287 if (-1 == ret) {
3288 write_unlock_irqrestore(&atomic_rw, iflags);
3289 return DID_ERROR << 16;
3290 } else if (sdebug_verbose && !ndob && (ret < sdebug_sector_size))
3291 sdev_printk(KERN_INFO, scp->device,
3292 "%s: %s: lb size=%u, IO sent=%d bytes\n",
3293 my_name, "write same",
3294 sdebug_sector_size, ret);
3295
3296 /* Copy first sector to remaining blocks */
3297 for (i = 1 ; i < num ; i++)
3298 memcpy(fake_storep + ((lba + i) * sdebug_sector_size),
3299 fake_storep + lba_off,
3300 sdebug_sector_size);
3301
3302 if (scsi_debug_lbp())
3303 map_region(lba, num);
3304 out:
3305 write_unlock_irqrestore(&atomic_rw, iflags);
3306
3307 return 0;
3308 }
3309
3310 static int resp_write_same_10(struct scsi_cmnd *scp,
3311 struct sdebug_dev_info *devip)
3312 {
3313 u8 *cmd = scp->cmnd;
3314 u32 lba;
3315 u16 num;
3316 u32 ei_lba = 0;
3317 bool unmap = false;
3318
3319 if (cmd[1] & 0x8) {
3320 if (sdebug_lbpws10 == 0) {
3321 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 3);
3322 return check_condition_result;
3323 } else
3324 unmap = true;
3325 }
3326 lba = get_unaligned_be32(cmd + 2);
3327 num = get_unaligned_be16(cmd + 7);
3328 if (num > sdebug_write_same_length) {
3329 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 7, -1);
3330 return check_condition_result;
3331 }
3332 return resp_write_same(scp, lba, num, ei_lba, unmap, false);
3333 }
3334
3335 static int resp_write_same_16(struct scsi_cmnd *scp,
3336 struct sdebug_dev_info *devip)
3337 {
3338 u8 *cmd = scp->cmnd;
3339 u64 lba;
3340 u32 num;
3341 u32 ei_lba = 0;
3342 bool unmap = false;
3343 bool ndob = false;
3344
3345 if (cmd[1] & 0x8) { /* UNMAP */
3346 if (sdebug_lbpws == 0) {
3347 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 3);
3348 return check_condition_result;
3349 } else
3350 unmap = true;
3351 }
3352 if (cmd[1] & 0x1) /* NDOB (no data-out buffer, assumes zeroes) */
3353 ndob = true;
3354 lba = get_unaligned_be64(cmd + 2);
3355 num = get_unaligned_be32(cmd + 10);
3356 if (num > sdebug_write_same_length) {
3357 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 10, -1);
3358 return check_condition_result;
3359 }
3360 return resp_write_same(scp, lba, num, ei_lba, unmap, ndob);
3361 }
3362
3363 /* Note the mode field is in the same position as the (lower) service action
3364 * field. For the Report supported operation codes command, SPC-4 suggests
3365 * each mode of this command should be reported separately; for future. */
3366 static int resp_write_buffer(struct scsi_cmnd *scp,
3367 struct sdebug_dev_info *devip)
3368 {
3369 u8 *cmd = scp->cmnd;
3370 struct scsi_device *sdp = scp->device;
3371 struct sdebug_dev_info *dp;
3372 u8 mode;
3373
3374 mode = cmd[1] & 0x1f;
3375 switch (mode) {
3376 case 0x4: /* download microcode (MC) and activate (ACT) */
3377 /* set UAs on this device only */
3378 set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm);
3379 set_bit(SDEBUG_UA_MICROCODE_CHANGED, devip->uas_bm);
3380 break;
3381 case 0x5: /* download MC, save and ACT */
3382 set_bit(SDEBUG_UA_MICROCODE_CHANGED_WO_RESET, devip->uas_bm);
3383 break;
3384 case 0x6: /* download MC with offsets and ACT */
3385 /* set UAs on most devices (LUs) in this target */
3386 list_for_each_entry(dp,
3387 &devip->sdbg_host->dev_info_list,
3388 dev_list)
3389 if (dp->target == sdp->id) {
3390 set_bit(SDEBUG_UA_BUS_RESET, dp->uas_bm);
3391 if (devip != dp)
3392 set_bit(SDEBUG_UA_MICROCODE_CHANGED,
3393 dp->uas_bm);
3394 }
3395 break;
3396 case 0x7: /* download MC with offsets, save, and ACT */
3397 /* set UA on all devices (LUs) in this target */
3398 list_for_each_entry(dp,
3399 &devip->sdbg_host->dev_info_list,
3400 dev_list)
3401 if (dp->target == sdp->id)
3402 set_bit(SDEBUG_UA_MICROCODE_CHANGED_WO_RESET,
3403 dp->uas_bm);
3404 break;
3405 default:
3406 /* do nothing for this command for other mode values */
3407 break;
3408 }
3409 return 0;
3410 }
3411
3412 static int resp_comp_write(struct scsi_cmnd *scp,
3413 struct sdebug_dev_info *devip)
3414 {
3415 u8 *cmd = scp->cmnd;
3416 u8 *arr;
3417 u8 *fake_storep_hold;
3418 u64 lba;
3419 u32 dnum;
3420 u32 lb_size = sdebug_sector_size;
3421 u8 num;
3422 unsigned long iflags;
3423 int ret;
3424 int retval = 0;
3425
3426 lba = get_unaligned_be64(cmd + 2);
3427 num = cmd[13]; /* 1 to a maximum of 255 logical blocks */
3428 if (0 == num)
3429 return 0; /* degenerate case, not an error */
3430 if (sdebug_dif == T10_PI_TYPE2_PROTECTION &&
3431 (cmd[1] & 0xe0)) {
3432 mk_sense_invalid_opcode(scp);
3433 return check_condition_result;
3434 }
3435 if ((sdebug_dif == T10_PI_TYPE1_PROTECTION ||
3436 sdebug_dif == T10_PI_TYPE3_PROTECTION) &&
3437 (cmd[1] & 0xe0) == 0)
3438 sdev_printk(KERN_ERR, scp->device, "Unprotected WR "
3439 "to DIF device\n");
3440
3441 /* inline check_device_access_params() */
3442 if (lba + num > sdebug_capacity) {
3443 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
3444 return check_condition_result;
3445 }
3446 /* transfer length excessive (tie in to block limits VPD page) */
3447 if (num > sdebug_store_sectors) {
3448 /* needs work to find which cdb byte 'num' comes from */
3449 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
3450 return check_condition_result;
3451 }
3452 dnum = 2 * num;
3453 arr = kcalloc(lb_size, dnum, GFP_ATOMIC);
3454 if (NULL == arr) {
3455 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
3456 INSUFF_RES_ASCQ);
3457 return check_condition_result;
3458 }
3459
3460 write_lock_irqsave(&atomic_rw, iflags);
3461
3462 /* trick do_device_access() to fetch both compare and write buffers
3463 * from data-in into arr. Safe (atomic) since write_lock held. */
3464 fake_storep_hold = fake_storep;
3465 fake_storep = arr;
3466 ret = do_device_access(scp, 0, 0, dnum, true);
3467 fake_storep = fake_storep_hold;
3468 if (ret == -1) {
3469 retval = DID_ERROR << 16;
3470 goto cleanup;
3471 } else if (sdebug_verbose && (ret < (dnum * lb_size)))
3472 sdev_printk(KERN_INFO, scp->device, "%s: compare_write: cdb "
3473 "indicated=%u, IO sent=%d bytes\n", my_name,
3474 dnum * lb_size, ret);
3475 if (!comp_write_worker(lba, num, arr)) {
3476 mk_sense_buffer(scp, MISCOMPARE, MISCOMPARE_VERIFY_ASC, 0);
3477 retval = check_condition_result;
3478 goto cleanup;
3479 }
3480 if (scsi_debug_lbp())
3481 map_region(lba, num);
3482 cleanup:
3483 write_unlock_irqrestore(&atomic_rw, iflags);
3484 kfree(arr);
3485 return retval;
3486 }
3487
3488 struct unmap_block_desc {
3489 __be64 lba;
3490 __be32 blocks;
3491 __be32 __reserved;
3492 };
3493
3494 static int resp_unmap(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
3495 {
3496 unsigned char *buf;
3497 struct unmap_block_desc *desc;
3498 unsigned int i, payload_len, descriptors;
3499 int ret;
3500 unsigned long iflags;
3501
3502
3503 if (!scsi_debug_lbp())
3504 return 0; /* fib and say its done */
3505 payload_len = get_unaligned_be16(scp->cmnd + 7);
3506 BUG_ON(scsi_bufflen(scp) != payload_len);
3507
3508 descriptors = (payload_len - 8) / 16;
3509 if (descriptors > sdebug_unmap_max_desc) {
3510 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 7, -1);
3511 return check_condition_result;
3512 }
3513
3514 buf = kzalloc(scsi_bufflen(scp), GFP_ATOMIC);
3515 if (!buf) {
3516 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
3517 INSUFF_RES_ASCQ);
3518 return check_condition_result;
3519 }
3520
3521 scsi_sg_copy_to_buffer(scp, buf, scsi_bufflen(scp));
3522
3523 BUG_ON(get_unaligned_be16(&buf[0]) != payload_len - 2);
3524 BUG_ON(get_unaligned_be16(&buf[2]) != descriptors * 16);
3525
3526 desc = (void *)&buf[8];
3527
3528 write_lock_irqsave(&atomic_rw, iflags);
3529
3530 for (i = 0 ; i < descriptors ; i++) {
3531 unsigned long long lba = get_unaligned_be64(&desc[i].lba);
3532 unsigned int num = get_unaligned_be32(&desc[i].blocks);
3533
3534 ret = check_device_access_params(scp, lba, num);
3535 if (ret)
3536 goto out;
3537
3538 unmap_region(lba, num);
3539 }
3540
3541 ret = 0;
3542
3543 out:
3544 write_unlock_irqrestore(&atomic_rw, iflags);
3545 kfree(buf);
3546
3547 return ret;
3548 }
3549
3550 #define SDEBUG_GET_LBA_STATUS_LEN 32
3551
3552 static int resp_get_lba_status(struct scsi_cmnd *scp,
3553 struct sdebug_dev_info *devip)
3554 {
3555 u8 *cmd = scp->cmnd;
3556 u64 lba;
3557 u32 alloc_len, mapped, num;
3558 u8 arr[SDEBUG_GET_LBA_STATUS_LEN];
3559 int ret;
3560
3561 lba = get_unaligned_be64(cmd + 2);
3562 alloc_len = get_unaligned_be32(cmd + 10);
3563
3564 if (alloc_len < 24)
3565 return 0;
3566
3567 ret = check_device_access_params(scp, lba, 1);
3568 if (ret)
3569 return ret;
3570
3571 if (scsi_debug_lbp())
3572 mapped = map_state(lba, &num);
3573 else {
3574 mapped = 1;
3575 /* following just in case virtual_gb changed */
3576 sdebug_capacity = get_sdebug_capacity();
3577 if (sdebug_capacity - lba <= 0xffffffff)
3578 num = sdebug_capacity - lba;
3579 else
3580 num = 0xffffffff;
3581 }
3582
3583 memset(arr, 0, SDEBUG_GET_LBA_STATUS_LEN);
3584 put_unaligned_be32(20, arr); /* Parameter Data Length */
3585 put_unaligned_be64(lba, arr + 8); /* LBA */
3586 put_unaligned_be32(num, arr + 16); /* Number of blocks */
3587 arr[20] = !mapped; /* prov_stat=0: mapped; 1: dealloc */
3588
3589 return fill_from_dev_buffer(scp, arr, SDEBUG_GET_LBA_STATUS_LEN);
3590 }
3591
3592 static int resp_sync_cache(struct scsi_cmnd *scp,
3593 struct sdebug_dev_info *devip)
3594 {
3595 int res = 0;
3596 u64 lba;
3597 u32 num_blocks;
3598 u8 *cmd = scp->cmnd;
3599
3600 if (cmd[0] == SYNCHRONIZE_CACHE) { /* 10 byte cdb */
3601 lba = get_unaligned_be32(cmd + 2);
3602 num_blocks = get_unaligned_be16(cmd + 7);
3603 } else { /* SYNCHRONIZE_CACHE(16) */
3604 lba = get_unaligned_be64(cmd + 2);
3605 num_blocks = get_unaligned_be32(cmd + 10);
3606 }
3607 if (lba + num_blocks > sdebug_capacity) {
3608 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
3609 return check_condition_result;
3610 }
3611 if (!write_since_sync || cmd[1] & 0x2)
3612 res = SDEG_RES_IMMED_MASK;
3613 else /* delay if write_since_sync and IMMED clear */
3614 write_since_sync = false;
3615 return res;
3616 }
3617
3618 #define RL_BUCKET_ELEMS 8
3619
3620 /* Even though each pseudo target has a REPORT LUNS "well known logical unit"
3621 * (W-LUN), the normal Linux scanning logic does not associate it with a
3622 * device (e.g. /dev/sg7). The following magic will make that association:
3623 * "cd /sys/class/scsi_host/host<n> ; echo '- - 49409' > scan"
3624 * where <n> is a host number. If there are multiple targets in a host then
3625 * the above will associate a W-LUN to each target. To only get a W-LUN
3626 * for target 2, then use "echo '- 2 49409' > scan" .
3627 */
3628 static int resp_report_luns(struct scsi_cmnd *scp,
3629 struct sdebug_dev_info *devip)
3630 {
3631 unsigned char *cmd = scp->cmnd;
3632 unsigned int alloc_len;
3633 unsigned char select_report;
3634 u64 lun;
3635 struct scsi_lun *lun_p;
3636 u8 arr[RL_BUCKET_ELEMS * sizeof(struct scsi_lun)];
3637 unsigned int lun_cnt; /* normal LUN count (max: 256) */
3638 unsigned int wlun_cnt; /* report luns W-LUN count */
3639 unsigned int tlun_cnt; /* total LUN count */
3640 unsigned int rlen; /* response length (in bytes) */
3641 int k, j, n, res;
3642 unsigned int off_rsp = 0;
3643 const int sz_lun = sizeof(struct scsi_lun);
3644
3645 clear_luns_changed_on_target(devip);
3646
3647 select_report = cmd[2];
3648 alloc_len = get_unaligned_be32(cmd + 6);
3649
3650 if (alloc_len < 4) {
3651 pr_err("alloc len too small %d\n", alloc_len);
3652 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 6, -1);
3653 return check_condition_result;
3654 }
3655
3656 switch (select_report) {
3657 case 0: /* all LUNs apart from W-LUNs */
3658 lun_cnt = sdebug_max_luns;
3659 wlun_cnt = 0;
3660 break;
3661 case 1: /* only W-LUNs */
3662 lun_cnt = 0;
3663 wlun_cnt = 1;
3664 break;
3665 case 2: /* all LUNs */
3666 lun_cnt = sdebug_max_luns;
3667 wlun_cnt = 1;
3668 break;
3669 case 0x10: /* only administrative LUs */
3670 case 0x11: /* see SPC-5 */
3671 case 0x12: /* only subsiduary LUs owned by referenced LU */
3672 default:
3673 pr_debug("select report invalid %d\n", select_report);
3674 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, -1);
3675 return check_condition_result;
3676 }
3677
3678 if (sdebug_no_lun_0 && (lun_cnt > 0))
3679 --lun_cnt;
3680
3681 tlun_cnt = lun_cnt + wlun_cnt;
3682 rlen = tlun_cnt * sz_lun; /* excluding 8 byte header */
3683 scsi_set_resid(scp, scsi_bufflen(scp));
3684 pr_debug("select_report %d luns = %d wluns = %d no_lun0 %d\n",
3685 select_report, lun_cnt, wlun_cnt, sdebug_no_lun_0);
3686
3687 /* loops rely on sizeof response header same as sizeof lun (both 8) */
3688 lun = sdebug_no_lun_0 ? 1 : 0;
3689 for (k = 0, j = 0, res = 0; true; ++k, j = 0) {
3690 memset(arr, 0, sizeof(arr));
3691 lun_p = (struct scsi_lun *)&arr[0];
3692 if (k == 0) {
3693 put_unaligned_be32(rlen, &arr[0]);
3694 ++lun_p;
3695 j = 1;
3696 }
3697 for ( ; j < RL_BUCKET_ELEMS; ++j, ++lun_p) {
3698 if ((k * RL_BUCKET_ELEMS) + j > lun_cnt)
3699 break;
3700 int_to_scsilun(lun++, lun_p);
3701 }
3702 if (j < RL_BUCKET_ELEMS)
3703 break;
3704 n = j * sz_lun;
3705 res = p_fill_from_dev_buffer(scp, arr, n, off_rsp);
3706 if (res)
3707 return res;
3708 off_rsp += n;
3709 }
3710 if (wlun_cnt) {
3711 int_to_scsilun(SCSI_W_LUN_REPORT_LUNS, lun_p);
3712 ++j;
3713 }
3714 if (j > 0)
3715 res = p_fill_from_dev_buffer(scp, arr, j * sz_lun, off_rsp);
3716 return res;
3717 }
3718
3719 static int resp_xdwriteread(struct scsi_cmnd *scp, unsigned long long lba,
3720 unsigned int num, struct sdebug_dev_info *devip)
3721 {
3722 int j;
3723 unsigned char *kaddr, *buf;
3724 unsigned int offset;
3725 struct scsi_data_buffer *sdb = scsi_in(scp);
3726 struct sg_mapping_iter miter;
3727
3728 /* better not to use temporary buffer. */
3729 buf = kzalloc(scsi_bufflen(scp), GFP_ATOMIC);
3730 if (!buf) {
3731 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
3732 INSUFF_RES_ASCQ);
3733 return check_condition_result;
3734 }
3735
3736 scsi_sg_copy_to_buffer(scp, buf, scsi_bufflen(scp));
3737
3738 offset = 0;
3739 sg_miter_start(&miter, sdb->table.sgl, sdb->table.nents,
3740 SG_MITER_ATOMIC | SG_MITER_TO_SG);
3741
3742 while (sg_miter_next(&miter)) {
3743 kaddr = miter.addr;
3744 for (j = 0; j < miter.length; j++)
3745 *(kaddr + j) ^= *(buf + offset + j);
3746
3747 offset += miter.length;
3748 }
3749 sg_miter_stop(&miter);
3750 kfree(buf);
3751
3752 return 0;
3753 }
3754
3755 static int resp_xdwriteread_10(struct scsi_cmnd *scp,
3756 struct sdebug_dev_info *devip)
3757 {
3758 u8 *cmd = scp->cmnd;
3759 u64 lba;
3760 u32 num;
3761 int errsts;
3762
3763 if (!scsi_bidi_cmnd(scp)) {
3764 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
3765 INSUFF_RES_ASCQ);
3766 return check_condition_result;
3767 }
3768 errsts = resp_read_dt0(scp, devip);
3769 if (errsts)
3770 return errsts;
3771 if (!(cmd[1] & 0x4)) { /* DISABLE_WRITE is not set */
3772 errsts = resp_write_dt0(scp, devip);
3773 if (errsts)
3774 return errsts;
3775 }
3776 lba = get_unaligned_be32(cmd + 2);
3777 num = get_unaligned_be16(cmd + 7);
3778 return resp_xdwriteread(scp, lba, num, devip);
3779 }
3780
3781 static struct sdebug_queue *get_queue(struct scsi_cmnd *cmnd)
3782 {
3783 u32 tag = blk_mq_unique_tag(cmnd->request);
3784 u16 hwq = blk_mq_unique_tag_to_hwq(tag);
3785
3786 pr_debug("tag=%#x, hwq=%d\n", tag, hwq);
3787 if (WARN_ON_ONCE(hwq >= submit_queues))
3788 hwq = 0;
3789 return sdebug_q_arr + hwq;
3790 }
3791
3792 /* Queued (deferred) command completions converge here. */
3793 static void sdebug_q_cmd_complete(struct sdebug_defer *sd_dp)
3794 {
3795 int qc_idx;
3796 int retiring = 0;
3797 unsigned long iflags;
3798 struct sdebug_queue *sqp;
3799 struct sdebug_queued_cmd *sqcp;
3800 struct scsi_cmnd *scp;
3801 struct sdebug_dev_info *devip;
3802
3803 sd_dp->defer_t = SDEB_DEFER_NONE;
3804 qc_idx = sd_dp->qc_idx;
3805 sqp = sdebug_q_arr + sd_dp->sqa_idx;
3806 if (sdebug_statistics) {
3807 atomic_inc(&sdebug_completions);
3808 if (raw_smp_processor_id() != sd_dp->issuing_cpu)
3809 atomic_inc(&sdebug_miss_cpus);
3810 }
3811 if (unlikely((qc_idx < 0) || (qc_idx >= SDEBUG_CANQUEUE))) {
3812 pr_err("wild qc_idx=%d\n", qc_idx);
3813 return;
3814 }
3815 spin_lock_irqsave(&sqp->qc_lock, iflags);
3816 sqcp = &sqp->qc_arr[qc_idx];
3817 scp = sqcp->a_cmnd;
3818 if (unlikely(scp == NULL)) {
3819 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
3820 pr_err("scp is NULL, sqa_idx=%d, qc_idx=%d\n",
3821 sd_dp->sqa_idx, qc_idx);
3822 return;
3823 }
3824 devip = (struct sdebug_dev_info *)scp->device->hostdata;
3825 if (likely(devip))
3826 atomic_dec(&devip->num_in_q);
3827 else
3828 pr_err("devip=NULL\n");
3829 if (unlikely(atomic_read(&retired_max_queue) > 0))
3830 retiring = 1;
3831
3832 sqcp->a_cmnd = NULL;
3833 if (unlikely(!test_and_clear_bit(qc_idx, sqp->in_use_bm))) {
3834 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
3835 pr_err("Unexpected completion\n");
3836 return;
3837 }
3838
3839 if (unlikely(retiring)) { /* user has reduced max_queue */
3840 int k, retval;
3841
3842 retval = atomic_read(&retired_max_queue);
3843 if (qc_idx >= retval) {
3844 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
3845 pr_err("index %d too large\n", retval);
3846 return;
3847 }
3848 k = find_last_bit(sqp->in_use_bm, retval);
3849 if ((k < sdebug_max_queue) || (k == retval))
3850 atomic_set(&retired_max_queue, 0);
3851 else
3852 atomic_set(&retired_max_queue, k + 1);
3853 }
3854 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
3855 scp->scsi_done(scp); /* callback to mid level */
3856 }
3857
3858 /* When high resolution timer goes off this function is called. */
3859 static enum hrtimer_restart sdebug_q_cmd_hrt_complete(struct hrtimer *timer)
3860 {
3861 struct sdebug_defer *sd_dp = container_of(timer, struct sdebug_defer,
3862 hrt);
3863 sdebug_q_cmd_complete(sd_dp);
3864 return HRTIMER_NORESTART;
3865 }
3866
3867 /* When work queue schedules work, it calls this function. */
3868 static void sdebug_q_cmd_wq_complete(struct work_struct *work)
3869 {
3870 struct sdebug_defer *sd_dp = container_of(work, struct sdebug_defer,
3871 ew.work);
3872 sdebug_q_cmd_complete(sd_dp);
3873 }
3874
3875 static bool got_shared_uuid;
3876 static uuid_t shared_uuid;
3877
3878 static struct sdebug_dev_info *sdebug_device_create(
3879 struct sdebug_host_info *sdbg_host, gfp_t flags)
3880 {
3881 struct sdebug_dev_info *devip;
3882
3883 devip = kzalloc(sizeof(*devip), flags);
3884 if (devip) {
3885 if (sdebug_uuid_ctl == 1)
3886 uuid_gen(&devip->lu_name);
3887 else if (sdebug_uuid_ctl == 2) {
3888 if (got_shared_uuid)
3889 devip->lu_name = shared_uuid;
3890 else {
3891 uuid_gen(&shared_uuid);
3892 got_shared_uuid = true;
3893 devip->lu_name = shared_uuid;
3894 }
3895 }
3896 devip->sdbg_host = sdbg_host;
3897 list_add_tail(&devip->dev_list, &sdbg_host->dev_info_list);
3898 }
3899 return devip;
3900 }
3901
3902 static struct sdebug_dev_info *find_build_dev_info(struct scsi_device *sdev)
3903 {
3904 struct sdebug_host_info *sdbg_host;
3905 struct sdebug_dev_info *open_devip = NULL;
3906 struct sdebug_dev_info *devip;
3907
3908 sdbg_host = *(struct sdebug_host_info **)shost_priv(sdev->host);
3909 if (!sdbg_host) {
3910 pr_err("Host info NULL\n");
3911 return NULL;
3912 }
3913 list_for_each_entry(devip, &sdbg_host->dev_info_list, dev_list) {
3914 if ((devip->used) && (devip->channel == sdev->channel) &&
3915 (devip->target == sdev->id) &&
3916 (devip->lun == sdev->lun))
3917 return devip;
3918 else {
3919 if ((!devip->used) && (!open_devip))
3920 open_devip = devip;
3921 }
3922 }
3923 if (!open_devip) { /* try and make a new one */
3924 open_devip = sdebug_device_create(sdbg_host, GFP_ATOMIC);
3925 if (!open_devip) {
3926 pr_err("out of memory at line %d\n", __LINE__);
3927 return NULL;
3928 }
3929 }
3930
3931 open_devip->channel = sdev->channel;
3932 open_devip->target = sdev->id;
3933 open_devip->lun = sdev->lun;
3934 open_devip->sdbg_host = sdbg_host;
3935 atomic_set(&open_devip->num_in_q, 0);
3936 set_bit(SDEBUG_UA_POR, open_devip->uas_bm);
3937 open_devip->used = true;
3938 return open_devip;
3939 }
3940
3941 static int scsi_debug_slave_alloc(struct scsi_device *sdp)
3942 {
3943 if (sdebug_verbose)
3944 pr_info("slave_alloc <%u %u %u %llu>\n",
3945 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
3946 blk_queue_flag_set(QUEUE_FLAG_BIDI, sdp->request_queue);
3947 return 0;
3948 }
3949
3950 static int scsi_debug_slave_configure(struct scsi_device *sdp)
3951 {
3952 struct sdebug_dev_info *devip =
3953 (struct sdebug_dev_info *)sdp->hostdata;
3954
3955 if (sdebug_verbose)
3956 pr_info("slave_configure <%u %u %u %llu>\n",
3957 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
3958 if (sdp->host->max_cmd_len != SDEBUG_MAX_CMD_LEN)
3959 sdp->host->max_cmd_len = SDEBUG_MAX_CMD_LEN;
3960 if (devip == NULL) {
3961 devip = find_build_dev_info(sdp);
3962 if (devip == NULL)
3963 return 1; /* no resources, will be marked offline */
3964 }
3965 sdp->hostdata = devip;
3966 blk_queue_max_segment_size(sdp->request_queue, -1U);
3967 if (sdebug_no_uld)
3968 sdp->no_uld_attach = 1;
3969 config_cdb_len(sdp);
3970 return 0;
3971 }
3972
3973 static void scsi_debug_slave_destroy(struct scsi_device *sdp)
3974 {
3975 struct sdebug_dev_info *devip =
3976 (struct sdebug_dev_info *)sdp->hostdata;
3977
3978 if (sdebug_verbose)
3979 pr_info("slave_destroy <%u %u %u %llu>\n",
3980 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
3981 if (devip) {
3982 /* make this slot available for re-use */
3983 devip->used = false;
3984 sdp->hostdata = NULL;
3985 }
3986 }
3987
3988 static void stop_qc_helper(struct sdebug_defer *sd_dp,
3989 enum sdeb_defer_type defer_t)
3990 {
3991 if (!sd_dp)
3992 return;
3993 if (defer_t == SDEB_DEFER_HRT)
3994 hrtimer_cancel(&sd_dp->hrt);
3995 else if (defer_t == SDEB_DEFER_WQ)
3996 cancel_work_sync(&sd_dp->ew.work);
3997 }
3998
3999 /* If @cmnd found deletes its timer or work queue and returns true; else
4000 returns false */
4001 static bool stop_queued_cmnd(struct scsi_cmnd *cmnd)
4002 {
4003 unsigned long iflags;
4004 int j, k, qmax, r_qmax;
4005 enum sdeb_defer_type l_defer_t;
4006 struct sdebug_queue *sqp;
4007 struct sdebug_queued_cmd *sqcp;
4008 struct sdebug_dev_info *devip;
4009 struct sdebug_defer *sd_dp;
4010
4011 for (j = 0, sqp = sdebug_q_arr; j < submit_queues; ++j, ++sqp) {
4012 spin_lock_irqsave(&sqp->qc_lock, iflags);
4013 qmax = sdebug_max_queue;
4014 r_qmax = atomic_read(&retired_max_queue);
4015 if (r_qmax > qmax)
4016 qmax = r_qmax;
4017 for (k = 0; k < qmax; ++k) {
4018 if (test_bit(k, sqp->in_use_bm)) {
4019 sqcp = &sqp->qc_arr[k];
4020 if (cmnd != sqcp->a_cmnd)
4021 continue;
4022 /* found */
4023 devip = (struct sdebug_dev_info *)
4024 cmnd->device->hostdata;
4025 if (devip)
4026 atomic_dec(&devip->num_in_q);
4027 sqcp->a_cmnd = NULL;
4028 sd_dp = sqcp->sd_dp;
4029 if (sd_dp) {
4030 l_defer_t = sd_dp->defer_t;
4031 sd_dp->defer_t = SDEB_DEFER_NONE;
4032 } else
4033 l_defer_t = SDEB_DEFER_NONE;
4034 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
4035 stop_qc_helper(sd_dp, l_defer_t);
4036 clear_bit(k, sqp->in_use_bm);
4037 return true;
4038 }
4039 }
4040 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
4041 }
4042 return false;
4043 }
4044
4045 /* Deletes (stops) timers or work queues of all queued commands */
4046 static void stop_all_queued(void)
4047 {
4048 unsigned long iflags;
4049 int j, k;
4050 enum sdeb_defer_type l_defer_t;
4051 struct sdebug_queue *sqp;
4052 struct sdebug_queued_cmd *sqcp;
4053 struct sdebug_dev_info *devip;
4054 struct sdebug_defer *sd_dp;
4055
4056 for (j = 0, sqp = sdebug_q_arr; j < submit_queues; ++j, ++sqp) {
4057 spin_lock_irqsave(&sqp->qc_lock, iflags);
4058 for (k = 0; k < SDEBUG_CANQUEUE; ++k) {
4059 if (test_bit(k, sqp->in_use_bm)) {
4060 sqcp = &sqp->qc_arr[k];
4061 if (sqcp->a_cmnd == NULL)
4062 continue;
4063 devip = (struct sdebug_dev_info *)
4064 sqcp->a_cmnd->device->hostdata;
4065 if (devip)
4066 atomic_dec(&devip->num_in_q);
4067 sqcp->a_cmnd = NULL;
4068 sd_dp = sqcp->sd_dp;
4069 if (sd_dp) {
4070 l_defer_t = sd_dp->defer_t;
4071 sd_dp->defer_t = SDEB_DEFER_NONE;
4072 } else
4073 l_defer_t = SDEB_DEFER_NONE;
4074 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
4075 stop_qc_helper(sd_dp, l_defer_t);
4076 clear_bit(k, sqp->in_use_bm);
4077 spin_lock_irqsave(&sqp->qc_lock, iflags);
4078 }
4079 }
4080 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
4081 }
4082 }
4083
4084 /* Free queued command memory on heap */
4085 static void free_all_queued(void)
4086 {
4087 int j, k;
4088 struct sdebug_queue *sqp;
4089 struct sdebug_queued_cmd *sqcp;
4090
4091 for (j = 0, sqp = sdebug_q_arr; j < submit_queues; ++j, ++sqp) {
4092 for (k = 0; k < SDEBUG_CANQUEUE; ++k) {
4093 sqcp = &sqp->qc_arr[k];
4094 kfree(sqcp->sd_dp);
4095 sqcp->sd_dp = NULL;
4096 }
4097 }
4098 }
4099
4100 static int scsi_debug_abort(struct scsi_cmnd *SCpnt)
4101 {
4102 bool ok;
4103
4104 ++num_aborts;
4105 if (SCpnt) {
4106 ok = stop_queued_cmnd(SCpnt);
4107 if (SCpnt->device && (SDEBUG_OPT_ALL_NOISE & sdebug_opts))
4108 sdev_printk(KERN_INFO, SCpnt->device,
4109 "%s: command%s found\n", __func__,
4110 ok ? "" : " not");
4111 }
4112 return SUCCESS;
4113 }
4114
4115 static int scsi_debug_device_reset(struct scsi_cmnd *SCpnt)
4116 {
4117 ++num_dev_resets;
4118 if (SCpnt && SCpnt->device) {
4119 struct scsi_device *sdp = SCpnt->device;
4120 struct sdebug_dev_info *devip =
4121 (struct sdebug_dev_info *)sdp->hostdata;
4122
4123 if (SDEBUG_OPT_ALL_NOISE & sdebug_opts)
4124 sdev_printk(KERN_INFO, sdp, "%s\n", __func__);
4125 if (devip)
4126 set_bit(SDEBUG_UA_POR, devip->uas_bm);
4127 }
4128 return SUCCESS;
4129 }
4130
4131 static int scsi_debug_target_reset(struct scsi_cmnd *SCpnt)
4132 {
4133 struct sdebug_host_info *sdbg_host;
4134 struct sdebug_dev_info *devip;
4135 struct scsi_device *sdp;
4136 struct Scsi_Host *hp;
4137 int k = 0;
4138
4139 ++num_target_resets;
4140 if (!SCpnt)
4141 goto lie;
4142 sdp = SCpnt->device;
4143 if (!sdp)
4144 goto lie;
4145 if (SDEBUG_OPT_ALL_NOISE & sdebug_opts)
4146 sdev_printk(KERN_INFO, sdp, "%s\n", __func__);
4147 hp = sdp->host;
4148 if (!hp)
4149 goto lie;
4150 sdbg_host = *(struct sdebug_host_info **)shost_priv(hp);
4151 if (sdbg_host) {
4152 list_for_each_entry(devip,
4153 &sdbg_host->dev_info_list,
4154 dev_list)
4155 if (devip->target == sdp->id) {
4156 set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm);
4157 ++k;
4158 }
4159 }
4160 if (SDEBUG_OPT_RESET_NOISE & sdebug_opts)
4161 sdev_printk(KERN_INFO, sdp,
4162 "%s: %d device(s) found in target\n", __func__, k);
4163 lie:
4164 return SUCCESS;
4165 }
4166
4167 static int scsi_debug_bus_reset(struct scsi_cmnd *SCpnt)
4168 {
4169 struct sdebug_host_info *sdbg_host;
4170 struct sdebug_dev_info *devip;
4171 struct scsi_device *sdp;
4172 struct Scsi_Host *hp;
4173 int k = 0;
4174
4175 ++num_bus_resets;
4176 if (!(SCpnt && SCpnt->device))
4177 goto lie;
4178 sdp = SCpnt->device;
4179 if (SDEBUG_OPT_ALL_NOISE & sdebug_opts)
4180 sdev_printk(KERN_INFO, sdp, "%s\n", __func__);
4181 hp = sdp->host;
4182 if (hp) {
4183 sdbg_host = *(struct sdebug_host_info **)shost_priv(hp);
4184 if (sdbg_host) {
4185 list_for_each_entry(devip,
4186 &sdbg_host->dev_info_list,
4187 dev_list) {
4188 set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm);
4189 ++k;
4190 }
4191 }
4192 }
4193 if (SDEBUG_OPT_RESET_NOISE & sdebug_opts)
4194 sdev_printk(KERN_INFO, sdp,
4195 "%s: %d device(s) found in host\n", __func__, k);
4196 lie:
4197 return SUCCESS;
4198 }
4199
4200 static int scsi_debug_host_reset(struct scsi_cmnd *SCpnt)
4201 {
4202 struct sdebug_host_info *sdbg_host;
4203 struct sdebug_dev_info *devip;
4204 int k = 0;
4205
4206 ++num_host_resets;
4207 if ((SCpnt->device) && (SDEBUG_OPT_ALL_NOISE & sdebug_opts))
4208 sdev_printk(KERN_INFO, SCpnt->device, "%s\n", __func__);
4209 spin_lock(&sdebug_host_list_lock);
4210 list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) {
4211 list_for_each_entry(devip, &sdbg_host->dev_info_list,
4212 dev_list) {
4213 set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm);
4214 ++k;
4215 }
4216 }
4217 spin_unlock(&sdebug_host_list_lock);
4218 stop_all_queued();
4219 if (SDEBUG_OPT_RESET_NOISE & sdebug_opts)
4220 sdev_printk(KERN_INFO, SCpnt->device,
4221 "%s: %d device(s) found\n", __func__, k);
4222 return SUCCESS;
4223 }
4224
4225 static void __init sdebug_build_parts(unsigned char *ramp,
4226 unsigned long store_size)
4227 {
4228 struct partition *pp;
4229 int starts[SDEBUG_MAX_PARTS + 2];
4230 int sectors_per_part, num_sectors, k;
4231 int heads_by_sects, start_sec, end_sec;
4232
4233 /* assume partition table already zeroed */
4234 if ((sdebug_num_parts < 1) || (store_size < 1048576))
4235 return;
4236 if (sdebug_num_parts > SDEBUG_MAX_PARTS) {
4237 sdebug_num_parts = SDEBUG_MAX_PARTS;
4238 pr_warn("reducing partitions to %d\n", SDEBUG_MAX_PARTS);
4239 }
4240 num_sectors = (int)sdebug_store_sectors;
4241 sectors_per_part = (num_sectors - sdebug_sectors_per)
4242 / sdebug_num_parts;
4243 heads_by_sects = sdebug_heads * sdebug_sectors_per;
4244 starts[0] = sdebug_sectors_per;
4245 for (k = 1; k < sdebug_num_parts; ++k)
4246 starts[k] = ((k * sectors_per_part) / heads_by_sects)
4247 * heads_by_sects;
4248 starts[sdebug_num_parts] = num_sectors;
4249 starts[sdebug_num_parts + 1] = 0;
4250
4251 ramp[510] = 0x55; /* magic partition markings */
4252 ramp[511] = 0xAA;
4253 pp = (struct partition *)(ramp + 0x1be);
4254 for (k = 0; starts[k + 1]; ++k, ++pp) {
4255 start_sec = starts[k];
4256 end_sec = starts[k + 1] - 1;
4257 pp->boot_ind = 0;
4258
4259 pp->cyl = start_sec / heads_by_sects;
4260 pp->head = (start_sec - (pp->cyl * heads_by_sects))
4261 / sdebug_sectors_per;
4262 pp->sector = (start_sec % sdebug_sectors_per) + 1;
4263
4264 pp->end_cyl = end_sec / heads_by_sects;
4265 pp->end_head = (end_sec - (pp->end_cyl * heads_by_sects))
4266 / sdebug_sectors_per;
4267 pp->end_sector = (end_sec % sdebug_sectors_per) + 1;
4268
4269 pp->start_sect = cpu_to_le32(start_sec);
4270 pp->nr_sects = cpu_to_le32(end_sec - start_sec + 1);
4271 pp->sys_ind = 0x83; /* plain Linux partition */
4272 }
4273 }
4274
4275 static void block_unblock_all_queues(bool block)
4276 {
4277 int j;
4278 struct sdebug_queue *sqp;
4279
4280 for (j = 0, sqp = sdebug_q_arr; j < submit_queues; ++j, ++sqp)
4281 atomic_set(&sqp->blocked, (int)block);
4282 }
4283
4284 /* Adjust (by rounding down) the sdebug_cmnd_count so abs(every_nth)-1
4285 * commands will be processed normally before triggers occur.
4286 */
4287 static void tweak_cmnd_count(void)
4288 {
4289 int count, modulo;
4290
4291 modulo = abs(sdebug_every_nth);
4292 if (modulo < 2)
4293 return;
4294 block_unblock_all_queues(true);
4295 count = atomic_read(&sdebug_cmnd_count);
4296 atomic_set(&sdebug_cmnd_count, (count / modulo) * modulo);
4297 block_unblock_all_queues(false);
4298 }
4299
4300 static void clear_queue_stats(void)
4301 {
4302 atomic_set(&sdebug_cmnd_count, 0);
4303 atomic_set(&sdebug_completions, 0);
4304 atomic_set(&sdebug_miss_cpus, 0);
4305 atomic_set(&sdebug_a_tsf, 0);
4306 }
4307
4308 static void setup_inject(struct sdebug_queue *sqp,
4309 struct sdebug_queued_cmd *sqcp)
4310 {
4311 if ((atomic_read(&sdebug_cmnd_count) % abs(sdebug_every_nth)) > 0) {
4312 if (sdebug_every_nth > 0)
4313 sqcp->inj_recovered = sqcp->inj_transport
4314 = sqcp->inj_dif
4315 = sqcp->inj_dix = sqcp->inj_short = 0;
4316 return;
4317 }
4318 sqcp->inj_recovered = !!(SDEBUG_OPT_RECOVERED_ERR & sdebug_opts);
4319 sqcp->inj_transport = !!(SDEBUG_OPT_TRANSPORT_ERR & sdebug_opts);
4320 sqcp->inj_dif = !!(SDEBUG_OPT_DIF_ERR & sdebug_opts);
4321 sqcp->inj_dix = !!(SDEBUG_OPT_DIX_ERR & sdebug_opts);
4322 sqcp->inj_short = !!(SDEBUG_OPT_SHORT_TRANSFER & sdebug_opts);
4323 sqcp->inj_host_busy = !!(SDEBUG_OPT_HOST_BUSY & sdebug_opts);
4324 }
4325
4326 /* Complete the processing of the thread that queued a SCSI command to this
4327 * driver. It either completes the command by calling cmnd_done() or
4328 * schedules a hr timer or work queue then returns 0. Returns
4329 * SCSI_MLQUEUE_HOST_BUSY if temporarily out of resources.
4330 */
4331 static int schedule_resp(struct scsi_cmnd *cmnd, struct sdebug_dev_info *devip,
4332 int scsi_result,
4333 int (*pfp)(struct scsi_cmnd *,
4334 struct sdebug_dev_info *),
4335 int delta_jiff, int ndelay)
4336 {
4337 unsigned long iflags;
4338 int k, num_in_q, qdepth, inject;
4339 struct sdebug_queue *sqp;
4340 struct sdebug_queued_cmd *sqcp;
4341 struct scsi_device *sdp;
4342 struct sdebug_defer *sd_dp;
4343
4344 if (unlikely(devip == NULL)) {
4345 if (scsi_result == 0)
4346 scsi_result = DID_NO_CONNECT << 16;
4347 goto respond_in_thread;
4348 }
4349 sdp = cmnd->device;
4350
4351 if (delta_jiff == 0)
4352 goto respond_in_thread;
4353
4354 /* schedule the response at a later time if resources permit */
4355 sqp = get_queue(cmnd);
4356 spin_lock_irqsave(&sqp->qc_lock, iflags);
4357 if (unlikely(atomic_read(&sqp->blocked))) {
4358 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
4359 return SCSI_MLQUEUE_HOST_BUSY;
4360 }
4361 num_in_q = atomic_read(&devip->num_in_q);
4362 qdepth = cmnd->device->queue_depth;
4363 inject = 0;
4364 if (unlikely((qdepth > 0) && (num_in_q >= qdepth))) {
4365 if (scsi_result) {
4366 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
4367 goto respond_in_thread;
4368 } else
4369 scsi_result = device_qfull_result;
4370 } else if (unlikely(sdebug_every_nth &&
4371 (SDEBUG_OPT_RARE_TSF & sdebug_opts) &&
4372 (scsi_result == 0))) {
4373 if ((num_in_q == (qdepth - 1)) &&
4374 (atomic_inc_return(&sdebug_a_tsf) >=
4375 abs(sdebug_every_nth))) {
4376 atomic_set(&sdebug_a_tsf, 0);
4377 inject = 1;
4378 scsi_result = device_qfull_result;
4379 }
4380 }
4381
4382 k = find_first_zero_bit(sqp->in_use_bm, sdebug_max_queue);
4383 if (unlikely(k >= sdebug_max_queue)) {
4384 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
4385 if (scsi_result)
4386 goto respond_in_thread;
4387 else if (SDEBUG_OPT_ALL_TSF & sdebug_opts)
4388 scsi_result = device_qfull_result;
4389 if (SDEBUG_OPT_Q_NOISE & sdebug_opts)
4390 sdev_printk(KERN_INFO, sdp,
4391 "%s: max_queue=%d exceeded, %s\n",
4392 __func__, sdebug_max_queue,
4393 (scsi_result ? "status: TASK SET FULL" :
4394 "report: host busy"));
4395 if (scsi_result)
4396 goto respond_in_thread;
4397 else
4398 return SCSI_MLQUEUE_HOST_BUSY;
4399 }
4400 __set_bit(k, sqp->in_use_bm);
4401 atomic_inc(&devip->num_in_q);
4402 sqcp = &sqp->qc_arr[k];
4403 sqcp->a_cmnd = cmnd;
4404 cmnd->host_scribble = (unsigned char *)sqcp;
4405 sd_dp = sqcp->sd_dp;
4406 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
4407 if (unlikely(sdebug_every_nth && sdebug_any_injecting_opt))
4408 setup_inject(sqp, sqcp);
4409 if (sd_dp == NULL) {
4410 sd_dp = kzalloc(sizeof(*sd_dp), GFP_ATOMIC);
4411 if (sd_dp == NULL)
4412 return SCSI_MLQUEUE_HOST_BUSY;
4413 }
4414
4415 cmnd->result = pfp != NULL ? pfp(cmnd, devip) : 0;
4416 if (cmnd->result & SDEG_RES_IMMED_MASK) {
4417 /*
4418 * This is the F_DELAY_OVERR case. No delay.
4419 */
4420 cmnd->result &= ~SDEG_RES_IMMED_MASK;
4421 delta_jiff = ndelay = 0;
4422 }
4423 if (cmnd->result == 0 && scsi_result != 0)
4424 cmnd->result = scsi_result;
4425
4426 if (unlikely(sdebug_verbose && cmnd->result))
4427 sdev_printk(KERN_INFO, sdp, "%s: non-zero result=0x%x\n",
4428 __func__, cmnd->result);
4429
4430 if (delta_jiff > 0 || ndelay > 0) {
4431 ktime_t kt;
4432
4433 if (delta_jiff > 0) {
4434 kt = ns_to_ktime((u64)delta_jiff * (NSEC_PER_SEC / HZ));
4435 } else
4436 kt = ndelay;
4437 if (!sd_dp->init_hrt) {
4438 sd_dp->init_hrt = true;
4439 sqcp->sd_dp = sd_dp;
4440 hrtimer_init(&sd_dp->hrt, CLOCK_MONOTONIC,
4441 HRTIMER_MODE_REL_PINNED);
4442 sd_dp->hrt.function = sdebug_q_cmd_hrt_complete;
4443 sd_dp->sqa_idx = sqp - sdebug_q_arr;
4444 sd_dp->qc_idx = k;
4445 }
4446 if (sdebug_statistics)
4447 sd_dp->issuing_cpu = raw_smp_processor_id();
4448 sd_dp->defer_t = SDEB_DEFER_HRT;
4449 hrtimer_start(&sd_dp->hrt, kt, HRTIMER_MODE_REL_PINNED);
4450 } else { /* jdelay < 0, use work queue */
4451 if (!sd_dp->init_wq) {
4452 sd_dp->init_wq = true;
4453 sqcp->sd_dp = sd_dp;
4454 sd_dp->sqa_idx = sqp - sdebug_q_arr;
4455 sd_dp->qc_idx = k;
4456 INIT_WORK(&sd_dp->ew.work, sdebug_q_cmd_wq_complete);
4457 }
4458 if (sdebug_statistics)
4459 sd_dp->issuing_cpu = raw_smp_processor_id();
4460 sd_dp->defer_t = SDEB_DEFER_WQ;
4461 schedule_work(&sd_dp->ew.work);
4462 }
4463 if (unlikely((SDEBUG_OPT_Q_NOISE & sdebug_opts) &&
4464 (scsi_result == device_qfull_result)))
4465 sdev_printk(KERN_INFO, sdp,
4466 "%s: num_in_q=%d +1, %s%s\n", __func__,
4467 num_in_q, (inject ? "<inject> " : ""),
4468 "status: TASK SET FULL");
4469 return 0;
4470
4471 respond_in_thread: /* call back to mid-layer using invocation thread */
4472 cmnd->result = pfp != NULL ? pfp(cmnd, devip) : 0;
4473 cmnd->result &= ~SDEG_RES_IMMED_MASK;
4474 if (cmnd->result == 0 && scsi_result != 0)
4475 cmnd->result = scsi_result;
4476 cmnd->scsi_done(cmnd);
4477 return 0;
4478 }
4479
4480 /* Note: The following macros create attribute files in the
4481 /sys/module/scsi_debug/parameters directory. Unfortunately this
4482 driver is unaware of a change and cannot trigger auxiliary actions
4483 as it can when the corresponding attribute in the
4484 /sys/bus/pseudo/drivers/scsi_debug directory is changed.
4485 */
4486 module_param_named(add_host, sdebug_add_host, int, S_IRUGO | S_IWUSR);
4487 module_param_named(ato, sdebug_ato, int, S_IRUGO);
4488 module_param_named(cdb_len, sdebug_cdb_len, int, 0644);
4489 module_param_named(clustering, sdebug_clustering, bool, S_IRUGO | S_IWUSR);
4490 module_param_named(delay, sdebug_jdelay, int, S_IRUGO | S_IWUSR);
4491 module_param_named(dev_size_mb, sdebug_dev_size_mb, int, S_IRUGO);
4492 module_param_named(dif, sdebug_dif, int, S_IRUGO);
4493 module_param_named(dix, sdebug_dix, int, S_IRUGO);
4494 module_param_named(dsense, sdebug_dsense, int, S_IRUGO | S_IWUSR);
4495 module_param_named(every_nth, sdebug_every_nth, int, S_IRUGO | S_IWUSR);
4496 module_param_named(fake_rw, sdebug_fake_rw, int, S_IRUGO | S_IWUSR);
4497 module_param_named(guard, sdebug_guard, uint, S_IRUGO);
4498 module_param_named(host_lock, sdebug_host_lock, bool, S_IRUGO | S_IWUSR);
4499 module_param_string(inq_vendor, sdebug_inq_vendor_id,
4500 sizeof(sdebug_inq_vendor_id), S_IRUGO|S_IWUSR);
4501 module_param_string(inq_product, sdebug_inq_product_id,
4502 sizeof(sdebug_inq_product_id), S_IRUGO|S_IWUSR);
4503 module_param_string(inq_rev, sdebug_inq_product_rev,
4504 sizeof(sdebug_inq_product_rev), S_IRUGO|S_IWUSR);
4505 module_param_named(lbpu, sdebug_lbpu, int, S_IRUGO);
4506 module_param_named(lbpws, sdebug_lbpws, int, S_IRUGO);
4507 module_param_named(lbpws10, sdebug_lbpws10, int, S_IRUGO);
4508 module_param_named(lbprz, sdebug_lbprz, int, S_IRUGO);
4509 module_param_named(lowest_aligned, sdebug_lowest_aligned, int, S_IRUGO);
4510 module_param_named(max_luns, sdebug_max_luns, int, S_IRUGO | S_IWUSR);
4511 module_param_named(max_queue, sdebug_max_queue, int, S_IRUGO | S_IWUSR);
4512 module_param_named(medium_error_start, sdebug_medium_error_start, int, S_IRUGO | S_IWUSR);
4513 module_param_named(medium_error_count, sdebug_medium_error_count, int, S_IRUGO | S_IWUSR);
4514 module_param_named(ndelay, sdebug_ndelay, int, S_IRUGO | S_IWUSR);
4515 module_param_named(no_lun_0, sdebug_no_lun_0, int, S_IRUGO | S_IWUSR);
4516 module_param_named(no_uld, sdebug_no_uld, int, S_IRUGO);
4517 module_param_named(num_parts, sdebug_num_parts, int, S_IRUGO);
4518 module_param_named(num_tgts, sdebug_num_tgts, int, S_IRUGO | S_IWUSR);
4519 module_param_named(opt_blks, sdebug_opt_blks, int, S_IRUGO);
4520 module_param_named(opts, sdebug_opts, int, S_IRUGO | S_IWUSR);
4521 module_param_named(physblk_exp, sdebug_physblk_exp, int, S_IRUGO);
4522 module_param_named(opt_xferlen_exp, sdebug_opt_xferlen_exp, int, S_IRUGO);
4523 module_param_named(ptype, sdebug_ptype, int, S_IRUGO | S_IWUSR);
4524 module_param_named(removable, sdebug_removable, bool, S_IRUGO | S_IWUSR);
4525 module_param_named(scsi_level, sdebug_scsi_level, int, S_IRUGO);
4526 module_param_named(sector_size, sdebug_sector_size, int, S_IRUGO);
4527 module_param_named(statistics, sdebug_statistics, bool, S_IRUGO | S_IWUSR);
4528 module_param_named(strict, sdebug_strict, bool, S_IRUGO | S_IWUSR);
4529 module_param_named(submit_queues, submit_queues, int, S_IRUGO);
4530 module_param_named(unmap_alignment, sdebug_unmap_alignment, int, S_IRUGO);
4531 module_param_named(unmap_granularity, sdebug_unmap_granularity, int, S_IRUGO);
4532 module_param_named(unmap_max_blocks, sdebug_unmap_max_blocks, int, S_IRUGO);
4533 module_param_named(unmap_max_desc, sdebug_unmap_max_desc, int, S_IRUGO);
4534 module_param_named(virtual_gb, sdebug_virtual_gb, int, S_IRUGO | S_IWUSR);
4535 module_param_named(uuid_ctl, sdebug_uuid_ctl, int, S_IRUGO);
4536 module_param_named(vpd_use_hostno, sdebug_vpd_use_hostno, int,
4537 S_IRUGO | S_IWUSR);
4538 module_param_named(write_same_length, sdebug_write_same_length, int,
4539 S_IRUGO | S_IWUSR);
4540
4541 MODULE_AUTHOR("Eric Youngdale + Douglas Gilbert");
4542 MODULE_DESCRIPTION("SCSI debug adapter driver");
4543 MODULE_LICENSE("GPL");
4544 MODULE_VERSION(SDEBUG_VERSION);
4545
4546 MODULE_PARM_DESC(add_host, "0..127 hosts allowed(def=1)");
4547 MODULE_PARM_DESC(ato, "application tag ownership: 0=disk 1=host (def=1)");
4548 MODULE_PARM_DESC(cdb_len, "suggest CDB lengths to drivers (def=10)");
4549 MODULE_PARM_DESC(clustering, "when set enables larger transfers (def=0)");
4550 MODULE_PARM_DESC(delay, "response delay (def=1 jiffy); 0:imm, -1,-2:tiny");
4551 MODULE_PARM_DESC(dev_size_mb, "size in MiB of ram shared by devs(def=8)");
4552 MODULE_PARM_DESC(dif, "data integrity field type: 0-3 (def=0)");
4553 MODULE_PARM_DESC(dix, "data integrity extensions mask (def=0)");
4554 MODULE_PARM_DESC(dsense, "use descriptor sense format(def=0 -> fixed)");
4555 MODULE_PARM_DESC(every_nth, "timeout every nth command(def=0)");
4556 MODULE_PARM_DESC(fake_rw, "fake reads/writes instead of copying (def=0)");
4557 MODULE_PARM_DESC(guard, "protection checksum: 0=crc, 1=ip (def=0)");
4558 MODULE_PARM_DESC(host_lock, "host_lock is ignored (def=0)");
4559 MODULE_PARM_DESC(inq_vendor, "SCSI INQUIRY vendor string (def=\"Linux\")");
4560 MODULE_PARM_DESC(inq_product, "SCSI INQUIRY product string (def=\"scsi_debug\")");
4561 MODULE_PARM_DESC(inq_rev, "SCSI INQUIRY revision string (def=\""
4562 SDEBUG_VERSION "\")");
4563 MODULE_PARM_DESC(lbpu, "enable LBP, support UNMAP command (def=0)");
4564 MODULE_PARM_DESC(lbpws, "enable LBP, support WRITE SAME(16) with UNMAP bit (def=0)");
4565 MODULE_PARM_DESC(lbpws10, "enable LBP, support WRITE SAME(10) with UNMAP bit (def=0)");
4566 MODULE_PARM_DESC(lbprz,
4567 "on read unmapped LBs return 0 when 1 (def), return 0xff when 2");
4568 MODULE_PARM_DESC(lowest_aligned, "lowest aligned lba (def=0)");
4569 MODULE_PARM_DESC(max_luns, "number of LUNs per target to simulate(def=1)");
4570 MODULE_PARM_DESC(max_queue, "max number of queued commands (1 to max(def))");
4571 MODULE_PARM_DESC(medium_error_start, "starting sector number to return MEDIUM error");
4572 MODULE_PARM_DESC(medium_error_count, "count of sectors to return follow on MEDIUM error");
4573 MODULE_PARM_DESC(ndelay, "response delay in nanoseconds (def=0 -> ignore)");
4574 MODULE_PARM_DESC(no_lun_0, "no LU number 0 (def=0 -> have lun 0)");
4575 MODULE_PARM_DESC(no_uld, "stop ULD (e.g. sd driver) attaching (def=0))");
4576 MODULE_PARM_DESC(num_parts, "number of partitions(def=0)");
4577 MODULE_PARM_DESC(num_tgts, "number of targets per host to simulate(def=1)");
4578 MODULE_PARM_DESC(opt_blks, "optimal transfer length in blocks (def=1024)");
4579 MODULE_PARM_DESC(opts, "1->noise, 2->medium_err, 4->timeout, 8->recovered_err... (def=0)");
4580 MODULE_PARM_DESC(physblk_exp, "physical block exponent (def=0)");
4581 MODULE_PARM_DESC(opt_xferlen_exp, "optimal transfer length granularity exponent (def=physblk_exp)");
4582 MODULE_PARM_DESC(ptype, "SCSI peripheral type(def=0[disk])");
4583 MODULE_PARM_DESC(removable, "claim to have removable media (def=0)");
4584 MODULE_PARM_DESC(scsi_level, "SCSI level to simulate(def=7[SPC-5])");
4585 MODULE_PARM_DESC(sector_size, "logical block size in bytes (def=512)");
4586 MODULE_PARM_DESC(statistics, "collect statistics on commands, queues (def=0)");
4587 MODULE_PARM_DESC(strict, "stricter checks: reserved field in cdb (def=0)");
4588 MODULE_PARM_DESC(submit_queues, "support for block multi-queue (def=1)");
4589 MODULE_PARM_DESC(unmap_alignment, "lowest aligned thin provisioning lba (def=0)");
4590 MODULE_PARM_DESC(unmap_granularity, "thin provisioning granularity in blocks (def=1)");
4591 MODULE_PARM_DESC(unmap_max_blocks, "max # of blocks can be unmapped in one cmd (def=0xffffffff)");
4592 MODULE_PARM_DESC(unmap_max_desc, "max # of ranges that can be unmapped in one cmd (def=256)");
4593 MODULE_PARM_DESC(uuid_ctl,
4594 "1->use uuid for lu name, 0->don't, 2->all use same (def=0)");
4595 MODULE_PARM_DESC(virtual_gb, "virtual gigabyte (GiB) size (def=0 -> use dev_size_mb)");
4596 MODULE_PARM_DESC(vpd_use_hostno, "0 -> dev ids ignore hostno (def=1 -> unique dev ids)");
4597 MODULE_PARM_DESC(write_same_length, "Maximum blocks per WRITE SAME cmd (def=0xffff)");
4598
4599 #define SDEBUG_INFO_LEN 256
4600 static char sdebug_info[SDEBUG_INFO_LEN];
4601
4602 static const char *scsi_debug_info(struct Scsi_Host *shp)
4603 {
4604 int k;
4605
4606 k = scnprintf(sdebug_info, SDEBUG_INFO_LEN, "%s: version %s [%s]\n",
4607 my_name, SDEBUG_VERSION, sdebug_version_date);
4608 if (k >= (SDEBUG_INFO_LEN - 1))
4609 return sdebug_info;
4610 scnprintf(sdebug_info + k, SDEBUG_INFO_LEN - k,
4611 " dev_size_mb=%d, opts=0x%x, submit_queues=%d, %s=%d",
4612 sdebug_dev_size_mb, sdebug_opts, submit_queues,
4613 "statistics", (int)sdebug_statistics);
4614 return sdebug_info;
4615 }
4616
4617 /* 'echo <val> > /proc/scsi/scsi_debug/<host_id>' writes to opts */
4618 static int scsi_debug_write_info(struct Scsi_Host *host, char *buffer,
4619 int length)
4620 {
4621 char arr[16];
4622 int opts;
4623 int minLen = length > 15 ? 15 : length;
4624
4625 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
4626 return -EACCES;
4627 memcpy(arr, buffer, minLen);
4628 arr[minLen] = '\0';
4629 if (1 != sscanf(arr, "%d", &opts))
4630 return -EINVAL;
4631 sdebug_opts = opts;
4632 sdebug_verbose = !!(SDEBUG_OPT_NOISE & opts);
4633 sdebug_any_injecting_opt = !!(SDEBUG_OPT_ALL_INJECTING & opts);
4634 if (sdebug_every_nth != 0)
4635 tweak_cmnd_count();
4636 return length;
4637 }
4638
4639 /* Output seen with 'cat /proc/scsi/scsi_debug/<host_id>'. It will be the
4640 * same for each scsi_debug host (if more than one). Some of the counters
4641 * output are not atomics so might be inaccurate in a busy system. */
4642 static int scsi_debug_show_info(struct seq_file *m, struct Scsi_Host *host)
4643 {
4644 int f, j, l;
4645 struct sdebug_queue *sqp;
4646
4647 seq_printf(m, "scsi_debug adapter driver, version %s [%s]\n",
4648 SDEBUG_VERSION, sdebug_version_date);
4649 seq_printf(m, "num_tgts=%d, %ssize=%d MB, opts=0x%x, every_nth=%d\n",
4650 sdebug_num_tgts, "shared (ram) ", sdebug_dev_size_mb,
4651 sdebug_opts, sdebug_every_nth);
4652 seq_printf(m, "delay=%d, ndelay=%d, max_luns=%d, sector_size=%d %s\n",
4653 sdebug_jdelay, sdebug_ndelay, sdebug_max_luns,
4654 sdebug_sector_size, "bytes");
4655 seq_printf(m, "cylinders=%d, heads=%d, sectors=%d, command aborts=%d\n",
4656 sdebug_cylinders_per, sdebug_heads, sdebug_sectors_per,
4657 num_aborts);
4658 seq_printf(m, "RESETs: device=%d, target=%d, bus=%d, host=%d\n",
4659 num_dev_resets, num_target_resets, num_bus_resets,
4660 num_host_resets);
4661 seq_printf(m, "dix_reads=%d, dix_writes=%d, dif_errors=%d\n",
4662 dix_reads, dix_writes, dif_errors);
4663 seq_printf(m, "usec_in_jiffy=%lu, statistics=%d\n", TICK_NSEC / 1000,
4664 sdebug_statistics);
4665 seq_printf(m, "cmnd_count=%d, completions=%d, %s=%d, a_tsf=%d\n",
4666 atomic_read(&sdebug_cmnd_count),
4667 atomic_read(&sdebug_completions),
4668 "miss_cpus", atomic_read(&sdebug_miss_cpus),
4669 atomic_read(&sdebug_a_tsf));
4670
4671 seq_printf(m, "submit_queues=%d\n", submit_queues);
4672 for (j = 0, sqp = sdebug_q_arr; j < submit_queues; ++j, ++sqp) {
4673 seq_printf(m, " queue %d:\n", j);
4674 f = find_first_bit(sqp->in_use_bm, sdebug_max_queue);
4675 if (f != sdebug_max_queue) {
4676 l = find_last_bit(sqp->in_use_bm, sdebug_max_queue);
4677 seq_printf(m, " in_use_bm BUSY: %s: %d,%d\n",
4678 "first,last bits", f, l);
4679 }
4680 }
4681 return 0;
4682 }
4683
4684 static ssize_t delay_show(struct device_driver *ddp, char *buf)
4685 {
4686 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_jdelay);
4687 }
4688 /* Returns -EBUSY if jdelay is being changed and commands are queued. The unit
4689 * of delay is jiffies.
4690 */
4691 static ssize_t delay_store(struct device_driver *ddp, const char *buf,
4692 size_t count)
4693 {
4694 int jdelay, res;
4695
4696 if (count > 0 && sscanf(buf, "%d", &jdelay) == 1) {
4697 res = count;
4698 if (sdebug_jdelay != jdelay) {
4699 int j, k;
4700 struct sdebug_queue *sqp;
4701
4702 block_unblock_all_queues(true);
4703 for (j = 0, sqp = sdebug_q_arr; j < submit_queues;
4704 ++j, ++sqp) {
4705 k = find_first_bit(sqp->in_use_bm,
4706 sdebug_max_queue);
4707 if (k != sdebug_max_queue) {
4708 res = -EBUSY; /* queued commands */
4709 break;
4710 }
4711 }
4712 if (res > 0) {
4713 sdebug_jdelay = jdelay;
4714 sdebug_ndelay = 0;
4715 }
4716 block_unblock_all_queues(false);
4717 }
4718 return res;
4719 }
4720 return -EINVAL;
4721 }
4722 static DRIVER_ATTR_RW(delay);
4723
4724 static ssize_t ndelay_show(struct device_driver *ddp, char *buf)
4725 {
4726 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_ndelay);
4727 }
4728 /* Returns -EBUSY if ndelay is being changed and commands are queued */
4729 /* If > 0 and accepted then sdebug_jdelay is set to JDELAY_OVERRIDDEN */
4730 static ssize_t ndelay_store(struct device_driver *ddp, const char *buf,
4731 size_t count)
4732 {
4733 int ndelay, res;
4734
4735 if ((count > 0) && (1 == sscanf(buf, "%d", &ndelay)) &&
4736 (ndelay >= 0) && (ndelay < (1000 * 1000 * 1000))) {
4737 res = count;
4738 if (sdebug_ndelay != ndelay) {
4739 int j, k;
4740 struct sdebug_queue *sqp;
4741
4742 block_unblock_all_queues(true);
4743 for (j = 0, sqp = sdebug_q_arr; j < submit_queues;
4744 ++j, ++sqp) {
4745 k = find_first_bit(sqp->in_use_bm,
4746 sdebug_max_queue);
4747 if (k != sdebug_max_queue) {
4748 res = -EBUSY; /* queued commands */
4749 break;
4750 }
4751 }
4752 if (res > 0) {
4753 sdebug_ndelay = ndelay;
4754 sdebug_jdelay = ndelay ? JDELAY_OVERRIDDEN
4755 : DEF_JDELAY;
4756 }
4757 block_unblock_all_queues(false);
4758 }
4759 return res;
4760 }
4761 return -EINVAL;
4762 }
4763 static DRIVER_ATTR_RW(ndelay);
4764
4765 static ssize_t opts_show(struct device_driver *ddp, char *buf)
4766 {
4767 return scnprintf(buf, PAGE_SIZE, "0x%x\n", sdebug_opts);
4768 }
4769
4770 static ssize_t opts_store(struct device_driver *ddp, const char *buf,
4771 size_t count)
4772 {
4773 int opts;
4774 char work[20];
4775
4776 if (sscanf(buf, "%10s", work) == 1) {
4777 if (strncasecmp(work, "0x", 2) == 0) {
4778 if (kstrtoint(work + 2, 16, &opts) == 0)
4779 goto opts_done;
4780 } else {
4781 if (kstrtoint(work, 10, &opts) == 0)
4782 goto opts_done;
4783 }
4784 }
4785 return -EINVAL;
4786 opts_done:
4787 sdebug_opts = opts;
4788 sdebug_verbose = !!(SDEBUG_OPT_NOISE & opts);
4789 sdebug_any_injecting_opt = !!(SDEBUG_OPT_ALL_INJECTING & opts);
4790 tweak_cmnd_count();
4791 return count;
4792 }
4793 static DRIVER_ATTR_RW(opts);
4794
4795 static ssize_t ptype_show(struct device_driver *ddp, char *buf)
4796 {
4797 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_ptype);
4798 }
4799 static ssize_t ptype_store(struct device_driver *ddp, const char *buf,
4800 size_t count)
4801 {
4802 int n;
4803
4804 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
4805 sdebug_ptype = n;
4806 return count;
4807 }
4808 return -EINVAL;
4809 }
4810 static DRIVER_ATTR_RW(ptype);
4811
4812 static ssize_t dsense_show(struct device_driver *ddp, char *buf)
4813 {
4814 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_dsense);
4815 }
4816 static ssize_t dsense_store(struct device_driver *ddp, const char *buf,
4817 size_t count)
4818 {
4819 int n;
4820
4821 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
4822 sdebug_dsense = n;
4823 return count;
4824 }
4825 return -EINVAL;
4826 }
4827 static DRIVER_ATTR_RW(dsense);
4828
4829 static ssize_t fake_rw_show(struct device_driver *ddp, char *buf)
4830 {
4831 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_fake_rw);
4832 }
4833 static ssize_t fake_rw_store(struct device_driver *ddp, const char *buf,
4834 size_t count)
4835 {
4836 int n;
4837
4838 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
4839 n = (n > 0);
4840 sdebug_fake_rw = (sdebug_fake_rw > 0);
4841 if (sdebug_fake_rw != n) {
4842 if ((0 == n) && (NULL == fake_storep)) {
4843 unsigned long sz =
4844 (unsigned long)sdebug_dev_size_mb *
4845 1048576;
4846
4847 fake_storep = vmalloc(sz);
4848 if (NULL == fake_storep) {
4849 pr_err("out of memory, 9\n");
4850 return -ENOMEM;
4851 }
4852 memset(fake_storep, 0, sz);
4853 }
4854 sdebug_fake_rw = n;
4855 }
4856 return count;
4857 }
4858 return -EINVAL;
4859 }
4860 static DRIVER_ATTR_RW(fake_rw);
4861
4862 static ssize_t no_lun_0_show(struct device_driver *ddp, char *buf)
4863 {
4864 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_no_lun_0);
4865 }
4866 static ssize_t no_lun_0_store(struct device_driver *ddp, const char *buf,
4867 size_t count)
4868 {
4869 int n;
4870
4871 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
4872 sdebug_no_lun_0 = n;
4873 return count;
4874 }
4875 return -EINVAL;
4876 }
4877 static DRIVER_ATTR_RW(no_lun_0);
4878
4879 static ssize_t num_tgts_show(struct device_driver *ddp, char *buf)
4880 {
4881 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_num_tgts);
4882 }
4883 static ssize_t num_tgts_store(struct device_driver *ddp, const char *buf,
4884 size_t count)
4885 {
4886 int n;
4887
4888 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
4889 sdebug_num_tgts = n;
4890 sdebug_max_tgts_luns();
4891 return count;
4892 }
4893 return -EINVAL;
4894 }
4895 static DRIVER_ATTR_RW(num_tgts);
4896
4897 static ssize_t dev_size_mb_show(struct device_driver *ddp, char *buf)
4898 {
4899 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_dev_size_mb);
4900 }
4901 static DRIVER_ATTR_RO(dev_size_mb);
4902
4903 static ssize_t num_parts_show(struct device_driver *ddp, char *buf)
4904 {
4905 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_num_parts);
4906 }
4907 static DRIVER_ATTR_RO(num_parts);
4908
4909 static ssize_t every_nth_show(struct device_driver *ddp, char *buf)
4910 {
4911 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_every_nth);
4912 }
4913 static ssize_t every_nth_store(struct device_driver *ddp, const char *buf,
4914 size_t count)
4915 {
4916 int nth;
4917
4918 if ((count > 0) && (1 == sscanf(buf, "%d", &nth))) {
4919 sdebug_every_nth = nth;
4920 if (nth && !sdebug_statistics) {
4921 pr_info("every_nth needs statistics=1, set it\n");
4922 sdebug_statistics = true;
4923 }
4924 tweak_cmnd_count();
4925 return count;
4926 }
4927 return -EINVAL;
4928 }
4929 static DRIVER_ATTR_RW(every_nth);
4930
4931 static ssize_t max_luns_show(struct device_driver *ddp, char *buf)
4932 {
4933 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_max_luns);
4934 }
4935 static ssize_t max_luns_store(struct device_driver *ddp, const char *buf,
4936 size_t count)
4937 {
4938 int n;
4939 bool changed;
4940
4941 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
4942 if (n > 256) {
4943 pr_warn("max_luns can be no more than 256\n");
4944 return -EINVAL;
4945 }
4946 changed = (sdebug_max_luns != n);
4947 sdebug_max_luns = n;
4948 sdebug_max_tgts_luns();
4949 if (changed && (sdebug_scsi_level >= 5)) { /* >= SPC-3 */
4950 struct sdebug_host_info *sdhp;
4951 struct sdebug_dev_info *dp;
4952
4953 spin_lock(&sdebug_host_list_lock);
4954 list_for_each_entry(sdhp, &sdebug_host_list,
4955 host_list) {
4956 list_for_each_entry(dp, &sdhp->dev_info_list,
4957 dev_list) {
4958 set_bit(SDEBUG_UA_LUNS_CHANGED,
4959 dp->uas_bm);
4960 }
4961 }
4962 spin_unlock(&sdebug_host_list_lock);
4963 }
4964 return count;
4965 }
4966 return -EINVAL;
4967 }
4968 static DRIVER_ATTR_RW(max_luns);
4969
4970 static ssize_t max_queue_show(struct device_driver *ddp, char *buf)
4971 {
4972 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_max_queue);
4973 }
4974 /* N.B. max_queue can be changed while there are queued commands. In flight
4975 * commands beyond the new max_queue will be completed. */
4976 static ssize_t max_queue_store(struct device_driver *ddp, const char *buf,
4977 size_t count)
4978 {
4979 int j, n, k, a;
4980 struct sdebug_queue *sqp;
4981
4982 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n > 0) &&
4983 (n <= SDEBUG_CANQUEUE)) {
4984 block_unblock_all_queues(true);
4985 k = 0;
4986 for (j = 0, sqp = sdebug_q_arr; j < submit_queues;
4987 ++j, ++sqp) {
4988 a = find_last_bit(sqp->in_use_bm, SDEBUG_CANQUEUE);
4989 if (a > k)
4990 k = a;
4991 }
4992 sdebug_max_queue = n;
4993 if (k == SDEBUG_CANQUEUE)
4994 atomic_set(&retired_max_queue, 0);
4995 else if (k >= n)
4996 atomic_set(&retired_max_queue, k + 1);
4997 else
4998 atomic_set(&retired_max_queue, 0);
4999 block_unblock_all_queues(false);
5000 return count;
5001 }
5002 return -EINVAL;
5003 }
5004 static DRIVER_ATTR_RW(max_queue);
5005
5006 static ssize_t no_uld_show(struct device_driver *ddp, char *buf)
5007 {
5008 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_no_uld);
5009 }
5010 static DRIVER_ATTR_RO(no_uld);
5011
5012 static ssize_t scsi_level_show(struct device_driver *ddp, char *buf)
5013 {
5014 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_scsi_level);
5015 }
5016 static DRIVER_ATTR_RO(scsi_level);
5017
5018 static ssize_t virtual_gb_show(struct device_driver *ddp, char *buf)
5019 {
5020 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_virtual_gb);
5021 }
5022 static ssize_t virtual_gb_store(struct device_driver *ddp, const char *buf,
5023 size_t count)
5024 {
5025 int n;
5026 bool changed;
5027
5028 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
5029 changed = (sdebug_virtual_gb != n);
5030 sdebug_virtual_gb = n;
5031 sdebug_capacity = get_sdebug_capacity();
5032 if (changed) {
5033 struct sdebug_host_info *sdhp;
5034 struct sdebug_dev_info *dp;
5035
5036 spin_lock(&sdebug_host_list_lock);
5037 list_for_each_entry(sdhp, &sdebug_host_list,
5038 host_list) {
5039 list_for_each_entry(dp, &sdhp->dev_info_list,
5040 dev_list) {
5041 set_bit(SDEBUG_UA_CAPACITY_CHANGED,
5042 dp->uas_bm);
5043 }
5044 }
5045 spin_unlock(&sdebug_host_list_lock);
5046 }
5047 return count;
5048 }
5049 return -EINVAL;
5050 }
5051 static DRIVER_ATTR_RW(virtual_gb);
5052
5053 static ssize_t add_host_show(struct device_driver *ddp, char *buf)
5054 {
5055 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_add_host);
5056 }
5057
5058 static int sdebug_add_adapter(void);
5059 static void sdebug_remove_adapter(void);
5060
5061 static ssize_t add_host_store(struct device_driver *ddp, const char *buf,
5062 size_t count)
5063 {
5064 int delta_hosts;
5065
5066 if (sscanf(buf, "%d", &delta_hosts) != 1)
5067 return -EINVAL;
5068 if (delta_hosts > 0) {
5069 do {
5070 sdebug_add_adapter();
5071 } while (--delta_hosts);
5072 } else if (delta_hosts < 0) {
5073 do {
5074 sdebug_remove_adapter();
5075 } while (++delta_hosts);
5076 }
5077 return count;
5078 }
5079 static DRIVER_ATTR_RW(add_host);
5080
5081 static ssize_t vpd_use_hostno_show(struct device_driver *ddp, char *buf)
5082 {
5083 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_vpd_use_hostno);
5084 }
5085 static ssize_t vpd_use_hostno_store(struct device_driver *ddp, const char *buf,
5086 size_t count)
5087 {
5088 int n;
5089
5090 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
5091 sdebug_vpd_use_hostno = n;
5092 return count;
5093 }
5094 return -EINVAL;
5095 }
5096 static DRIVER_ATTR_RW(vpd_use_hostno);
5097
5098 static ssize_t statistics_show(struct device_driver *ddp, char *buf)
5099 {
5100 return scnprintf(buf, PAGE_SIZE, "%d\n", (int)sdebug_statistics);
5101 }
5102 static ssize_t statistics_store(struct device_driver *ddp, const char *buf,
5103 size_t count)
5104 {
5105 int n;
5106
5107 if ((count > 0) && (sscanf(buf, "%d", &n) == 1) && (n >= 0)) {
5108 if (n > 0)
5109 sdebug_statistics = true;
5110 else {
5111 clear_queue_stats();
5112 sdebug_statistics = false;
5113 }
5114 return count;
5115 }
5116 return -EINVAL;
5117 }
5118 static DRIVER_ATTR_RW(statistics);
5119
5120 static ssize_t sector_size_show(struct device_driver *ddp, char *buf)
5121 {
5122 return scnprintf(buf, PAGE_SIZE, "%u\n", sdebug_sector_size);
5123 }
5124 static DRIVER_ATTR_RO(sector_size);
5125
5126 static ssize_t submit_queues_show(struct device_driver *ddp, char *buf)
5127 {
5128 return scnprintf(buf, PAGE_SIZE, "%d\n", submit_queues);
5129 }
5130 static DRIVER_ATTR_RO(submit_queues);
5131
5132 static ssize_t dix_show(struct device_driver *ddp, char *buf)
5133 {
5134 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_dix);
5135 }
5136 static DRIVER_ATTR_RO(dix);
5137
5138 static ssize_t dif_show(struct device_driver *ddp, char *buf)
5139 {
5140 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_dif);
5141 }
5142 static DRIVER_ATTR_RO(dif);
5143
5144 static ssize_t guard_show(struct device_driver *ddp, char *buf)
5145 {
5146 return scnprintf(buf, PAGE_SIZE, "%u\n", sdebug_guard);
5147 }
5148 static DRIVER_ATTR_RO(guard);
5149
5150 static ssize_t ato_show(struct device_driver *ddp, char *buf)
5151 {
5152 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_ato);
5153 }
5154 static DRIVER_ATTR_RO(ato);
5155
5156 static ssize_t map_show(struct device_driver *ddp, char *buf)
5157 {
5158 ssize_t count;
5159
5160 if (!scsi_debug_lbp())
5161 return scnprintf(buf, PAGE_SIZE, "0-%u\n",
5162 sdebug_store_sectors);
5163
5164 count = scnprintf(buf, PAGE_SIZE - 1, "%*pbl",
5165 (int)map_size, map_storep);
5166 buf[count++] = '\n';
5167 buf[count] = '\0';
5168
5169 return count;
5170 }
5171 static DRIVER_ATTR_RO(map);
5172
5173 static ssize_t removable_show(struct device_driver *ddp, char *buf)
5174 {
5175 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_removable ? 1 : 0);
5176 }
5177 static ssize_t removable_store(struct device_driver *ddp, const char *buf,
5178 size_t count)
5179 {
5180 int n;
5181
5182 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
5183 sdebug_removable = (n > 0);
5184 return count;
5185 }
5186 return -EINVAL;
5187 }
5188 static DRIVER_ATTR_RW(removable);
5189
5190 static ssize_t host_lock_show(struct device_driver *ddp, char *buf)
5191 {
5192 return scnprintf(buf, PAGE_SIZE, "%d\n", !!sdebug_host_lock);
5193 }
5194 /* N.B. sdebug_host_lock does nothing, kept for backward compatibility */
5195 static ssize_t host_lock_store(struct device_driver *ddp, const char *buf,
5196 size_t count)
5197 {
5198 int n;
5199
5200 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
5201 sdebug_host_lock = (n > 0);
5202 return count;
5203 }
5204 return -EINVAL;
5205 }
5206 static DRIVER_ATTR_RW(host_lock);
5207
5208 static ssize_t strict_show(struct device_driver *ddp, char *buf)
5209 {
5210 return scnprintf(buf, PAGE_SIZE, "%d\n", !!sdebug_strict);
5211 }
5212 static ssize_t strict_store(struct device_driver *ddp, const char *buf,
5213 size_t count)
5214 {
5215 int n;
5216
5217 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
5218 sdebug_strict = (n > 0);
5219 return count;
5220 }
5221 return -EINVAL;
5222 }
5223 static DRIVER_ATTR_RW(strict);
5224
5225 static ssize_t uuid_ctl_show(struct device_driver *ddp, char *buf)
5226 {
5227 return scnprintf(buf, PAGE_SIZE, "%d\n", !!sdebug_uuid_ctl);
5228 }
5229 static DRIVER_ATTR_RO(uuid_ctl);
5230
5231 static ssize_t cdb_len_show(struct device_driver *ddp, char *buf)
5232 {
5233 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_cdb_len);
5234 }
5235 static ssize_t cdb_len_store(struct device_driver *ddp, const char *buf,
5236 size_t count)
5237 {
5238 int ret, n;
5239
5240 ret = kstrtoint(buf, 0, &n);
5241 if (ret)
5242 return ret;
5243 sdebug_cdb_len = n;
5244 all_config_cdb_len();
5245 return count;
5246 }
5247 static DRIVER_ATTR_RW(cdb_len);
5248
5249
5250 /* Note: The following array creates attribute files in the
5251 /sys/bus/pseudo/drivers/scsi_debug directory. The advantage of these
5252 files (over those found in the /sys/module/scsi_debug/parameters
5253 directory) is that auxiliary actions can be triggered when an attribute
5254 is changed. For example see: sdebug_add_host_store() above.
5255 */
5256
5257 static struct attribute *sdebug_drv_attrs[] = {
5258 &driver_attr_delay.attr,
5259 &driver_attr_opts.attr,
5260 &driver_attr_ptype.attr,
5261 &driver_attr_dsense.attr,
5262 &driver_attr_fake_rw.attr,
5263 &driver_attr_no_lun_0.attr,
5264 &driver_attr_num_tgts.attr,
5265 &driver_attr_dev_size_mb.attr,
5266 &driver_attr_num_parts.attr,
5267 &driver_attr_every_nth.attr,
5268 &driver_attr_max_luns.attr,
5269 &driver_attr_max_queue.attr,
5270 &driver_attr_no_uld.attr,
5271 &driver_attr_scsi_level.attr,
5272 &driver_attr_virtual_gb.attr,
5273 &driver_attr_add_host.attr,
5274 &driver_attr_vpd_use_hostno.attr,
5275 &driver_attr_sector_size.attr,
5276 &driver_attr_statistics.attr,
5277 &driver_attr_submit_queues.attr,
5278 &driver_attr_dix.attr,
5279 &driver_attr_dif.attr,
5280 &driver_attr_guard.attr,
5281 &driver_attr_ato.attr,
5282 &driver_attr_map.attr,
5283 &driver_attr_removable.attr,
5284 &driver_attr_host_lock.attr,
5285 &driver_attr_ndelay.attr,
5286 &driver_attr_strict.attr,
5287 &driver_attr_uuid_ctl.attr,
5288 &driver_attr_cdb_len.attr,
5289 NULL,
5290 };
5291 ATTRIBUTE_GROUPS(sdebug_drv);
5292
5293 static struct device *pseudo_primary;
5294
5295 static int __init scsi_debug_init(void)
5296 {
5297 unsigned long sz;
5298 int host_to_add;
5299 int k;
5300 int ret;
5301
5302 atomic_set(&retired_max_queue, 0);
5303
5304 if (sdebug_ndelay >= 1000 * 1000 * 1000) {
5305 pr_warn("ndelay must be less than 1 second, ignored\n");
5306 sdebug_ndelay = 0;
5307 } else if (sdebug_ndelay > 0)
5308 sdebug_jdelay = JDELAY_OVERRIDDEN;
5309
5310 switch (sdebug_sector_size) {
5311 case 512:
5312 case 1024:
5313 case 2048:
5314 case 4096:
5315 break;
5316 default:
5317 pr_err("invalid sector_size %d\n", sdebug_sector_size);
5318 return -EINVAL;
5319 }
5320
5321 switch (sdebug_dif) {
5322 case T10_PI_TYPE0_PROTECTION:
5323 break;
5324 case T10_PI_TYPE1_PROTECTION:
5325 case T10_PI_TYPE2_PROTECTION:
5326 case T10_PI_TYPE3_PROTECTION:
5327 have_dif_prot = true;
5328 break;
5329
5330 default:
5331 pr_err("dif must be 0, 1, 2 or 3\n");
5332 return -EINVAL;
5333 }
5334
5335 if (sdebug_guard > 1) {
5336 pr_err("guard must be 0 or 1\n");
5337 return -EINVAL;
5338 }
5339
5340 if (sdebug_ato > 1) {
5341 pr_err("ato must be 0 or 1\n");
5342 return -EINVAL;
5343 }
5344
5345 if (sdebug_physblk_exp > 15) {
5346 pr_err("invalid physblk_exp %u\n", sdebug_physblk_exp);
5347 return -EINVAL;
5348 }
5349 if (sdebug_max_luns > 256) {
5350 pr_warn("max_luns can be no more than 256, use default\n");
5351 sdebug_max_luns = DEF_MAX_LUNS;
5352 }
5353
5354 if (sdebug_lowest_aligned > 0x3fff) {
5355 pr_err("lowest_aligned too big: %u\n", sdebug_lowest_aligned);
5356 return -EINVAL;
5357 }
5358
5359 if (submit_queues < 1) {
5360 pr_err("submit_queues must be 1 or more\n");
5361 return -EINVAL;
5362 }
5363 sdebug_q_arr = kcalloc(submit_queues, sizeof(struct sdebug_queue),
5364 GFP_KERNEL);
5365 if (sdebug_q_arr == NULL)
5366 return -ENOMEM;
5367 for (k = 0; k < submit_queues; ++k)
5368 spin_lock_init(&sdebug_q_arr[k].qc_lock);
5369
5370 if (sdebug_dev_size_mb < 1)
5371 sdebug_dev_size_mb = 1; /* force minimum 1 MB ramdisk */
5372 sz = (unsigned long)sdebug_dev_size_mb * 1048576;
5373 sdebug_store_sectors = sz / sdebug_sector_size;
5374 sdebug_capacity = get_sdebug_capacity();
5375
5376 /* play around with geometry, don't waste too much on track 0 */
5377 sdebug_heads = 8;
5378 sdebug_sectors_per = 32;
5379 if (sdebug_dev_size_mb >= 256)
5380 sdebug_heads = 64;
5381 else if (sdebug_dev_size_mb >= 16)
5382 sdebug_heads = 32;
5383 sdebug_cylinders_per = (unsigned long)sdebug_capacity /
5384 (sdebug_sectors_per * sdebug_heads);
5385 if (sdebug_cylinders_per >= 1024) {
5386 /* other LLDs do this; implies >= 1GB ram disk ... */
5387 sdebug_heads = 255;
5388 sdebug_sectors_per = 63;
5389 sdebug_cylinders_per = (unsigned long)sdebug_capacity /
5390 (sdebug_sectors_per * sdebug_heads);
5391 }
5392
5393 if (sdebug_fake_rw == 0) {
5394 fake_storep = vmalloc(sz);
5395 if (NULL == fake_storep) {
5396 pr_err("out of memory, 1\n");
5397 ret = -ENOMEM;
5398 goto free_q_arr;
5399 }
5400 memset(fake_storep, 0, sz);
5401 if (sdebug_num_parts > 0)
5402 sdebug_build_parts(fake_storep, sz);
5403 }
5404
5405 if (sdebug_dix) {
5406 int dif_size;
5407
5408 dif_size = sdebug_store_sectors * sizeof(struct t10_pi_tuple);
5409 dif_storep = vmalloc(dif_size);
5410
5411 pr_err("dif_storep %u bytes @ %p\n", dif_size, dif_storep);
5412
5413 if (dif_storep == NULL) {
5414 pr_err("out of mem. (DIX)\n");
5415 ret = -ENOMEM;
5416 goto free_vm;
5417 }
5418
5419 memset(dif_storep, 0xff, dif_size);
5420 }
5421
5422 /* Logical Block Provisioning */
5423 if (scsi_debug_lbp()) {
5424 sdebug_unmap_max_blocks =
5425 clamp(sdebug_unmap_max_blocks, 0U, 0xffffffffU);
5426
5427 sdebug_unmap_max_desc =
5428 clamp(sdebug_unmap_max_desc, 0U, 256U);
5429
5430 sdebug_unmap_granularity =
5431 clamp(sdebug_unmap_granularity, 1U, 0xffffffffU);
5432
5433 if (sdebug_unmap_alignment &&
5434 sdebug_unmap_granularity <=
5435 sdebug_unmap_alignment) {
5436 pr_err("ERR: unmap_granularity <= unmap_alignment\n");
5437 ret = -EINVAL;
5438 goto free_vm;
5439 }
5440
5441 map_size = lba_to_map_index(sdebug_store_sectors - 1) + 1;
5442 map_storep = vmalloc(array_size(sizeof(long),
5443 BITS_TO_LONGS(map_size)));
5444
5445 pr_info("%lu provisioning blocks\n", map_size);
5446
5447 if (map_storep == NULL) {
5448 pr_err("out of mem. (MAP)\n");
5449 ret = -ENOMEM;
5450 goto free_vm;
5451 }
5452
5453 bitmap_zero(map_storep, map_size);
5454
5455 /* Map first 1KB for partition table */
5456 if (sdebug_num_parts)
5457 map_region(0, 2);
5458 }
5459
5460 pseudo_primary = root_device_register("pseudo_0");
5461 if (IS_ERR(pseudo_primary)) {
5462 pr_warn("root_device_register() error\n");
5463 ret = PTR_ERR(pseudo_primary);
5464 goto free_vm;
5465 }
5466 ret = bus_register(&pseudo_lld_bus);
5467 if (ret < 0) {
5468 pr_warn("bus_register error: %d\n", ret);
5469 goto dev_unreg;
5470 }
5471 ret = driver_register(&sdebug_driverfs_driver);
5472 if (ret < 0) {
5473 pr_warn("driver_register error: %d\n", ret);
5474 goto bus_unreg;
5475 }
5476
5477 host_to_add = sdebug_add_host;
5478 sdebug_add_host = 0;
5479
5480 for (k = 0; k < host_to_add; k++) {
5481 if (sdebug_add_adapter()) {
5482 pr_err("sdebug_add_adapter failed k=%d\n", k);
5483 break;
5484 }
5485 }
5486
5487 if (sdebug_verbose)
5488 pr_info("built %d host(s)\n", sdebug_add_host);
5489
5490 return 0;
5491
5492 bus_unreg:
5493 bus_unregister(&pseudo_lld_bus);
5494 dev_unreg:
5495 root_device_unregister(pseudo_primary);
5496 free_vm:
5497 vfree(map_storep);
5498 vfree(dif_storep);
5499 vfree(fake_storep);
5500 free_q_arr:
5501 kfree(sdebug_q_arr);
5502 return ret;
5503 }
5504
5505 static void __exit scsi_debug_exit(void)
5506 {
5507 int k = sdebug_add_host;
5508
5509 stop_all_queued();
5510 for (; k; k--)
5511 sdebug_remove_adapter();
5512 free_all_queued();
5513 driver_unregister(&sdebug_driverfs_driver);
5514 bus_unregister(&pseudo_lld_bus);
5515 root_device_unregister(pseudo_primary);
5516
5517 vfree(map_storep);
5518 vfree(dif_storep);
5519 vfree(fake_storep);
5520 kfree(sdebug_q_arr);
5521 }
5522
5523 device_initcall(scsi_debug_init);
5524 module_exit(scsi_debug_exit);
5525
5526 static void sdebug_release_adapter(struct device *dev)
5527 {
5528 struct sdebug_host_info *sdbg_host;
5529
5530 sdbg_host = to_sdebug_host(dev);
5531 kfree(sdbg_host);
5532 }
5533
5534 static int sdebug_add_adapter(void)
5535 {
5536 int k, devs_per_host;
5537 int error = 0;
5538 struct sdebug_host_info *sdbg_host;
5539 struct sdebug_dev_info *sdbg_devinfo, *tmp;
5540
5541 sdbg_host = kzalloc(sizeof(*sdbg_host), GFP_KERNEL);
5542 if (sdbg_host == NULL) {
5543 pr_err("out of memory at line %d\n", __LINE__);
5544 return -ENOMEM;
5545 }
5546
5547 INIT_LIST_HEAD(&sdbg_host->dev_info_list);
5548
5549 devs_per_host = sdebug_num_tgts * sdebug_max_luns;
5550 for (k = 0; k < devs_per_host; k++) {
5551 sdbg_devinfo = sdebug_device_create(sdbg_host, GFP_KERNEL);
5552 if (!sdbg_devinfo) {
5553 pr_err("out of memory at line %d\n", __LINE__);
5554 error = -ENOMEM;
5555 goto clean;
5556 }
5557 }
5558
5559 spin_lock(&sdebug_host_list_lock);
5560 list_add_tail(&sdbg_host->host_list, &sdebug_host_list);
5561 spin_unlock(&sdebug_host_list_lock);
5562
5563 sdbg_host->dev.bus = &pseudo_lld_bus;
5564 sdbg_host->dev.parent = pseudo_primary;
5565 sdbg_host->dev.release = &sdebug_release_adapter;
5566 dev_set_name(&sdbg_host->dev, "adapter%d", sdebug_add_host);
5567
5568 error = device_register(&sdbg_host->dev);
5569
5570 if (error)
5571 goto clean;
5572
5573 ++sdebug_add_host;
5574 return error;
5575
5576 clean:
5577 list_for_each_entry_safe(sdbg_devinfo, tmp, &sdbg_host->dev_info_list,
5578 dev_list) {
5579 list_del(&sdbg_devinfo->dev_list);
5580 kfree(sdbg_devinfo);
5581 }
5582
5583 kfree(sdbg_host);
5584 return error;
5585 }
5586
5587 static void sdebug_remove_adapter(void)
5588 {
5589 struct sdebug_host_info *sdbg_host = NULL;
5590
5591 spin_lock(&sdebug_host_list_lock);
5592 if (!list_empty(&sdebug_host_list)) {
5593 sdbg_host = list_entry(sdebug_host_list.prev,
5594 struct sdebug_host_info, host_list);
5595 list_del(&sdbg_host->host_list);
5596 }
5597 spin_unlock(&sdebug_host_list_lock);
5598
5599 if (!sdbg_host)
5600 return;
5601
5602 device_unregister(&sdbg_host->dev);
5603 --sdebug_add_host;
5604 }
5605
5606 static int sdebug_change_qdepth(struct scsi_device *sdev, int qdepth)
5607 {
5608 int num_in_q = 0;
5609 struct sdebug_dev_info *devip;
5610
5611 block_unblock_all_queues(true);
5612 devip = (struct sdebug_dev_info *)sdev->hostdata;
5613 if (NULL == devip) {
5614 block_unblock_all_queues(false);
5615 return -ENODEV;
5616 }
5617 num_in_q = atomic_read(&devip->num_in_q);
5618
5619 if (qdepth < 1)
5620 qdepth = 1;
5621 /* allow to exceed max host qc_arr elements for testing */
5622 if (qdepth > SDEBUG_CANQUEUE + 10)
5623 qdepth = SDEBUG_CANQUEUE + 10;
5624 scsi_change_queue_depth(sdev, qdepth);
5625
5626 if (SDEBUG_OPT_Q_NOISE & sdebug_opts) {
5627 sdev_printk(KERN_INFO, sdev, "%s: qdepth=%d, num_in_q=%d\n",
5628 __func__, qdepth, num_in_q);
5629 }
5630 block_unblock_all_queues(false);
5631 return sdev->queue_depth;
5632 }
5633
5634 static bool fake_timeout(struct scsi_cmnd *scp)
5635 {
5636 if (0 == (atomic_read(&sdebug_cmnd_count) % abs(sdebug_every_nth))) {
5637 if (sdebug_every_nth < -1)
5638 sdebug_every_nth = -1;
5639 if (SDEBUG_OPT_TIMEOUT & sdebug_opts)
5640 return true; /* ignore command causing timeout */
5641 else if (SDEBUG_OPT_MAC_TIMEOUT & sdebug_opts &&
5642 scsi_medium_access_command(scp))
5643 return true; /* time out reads and writes */
5644 }
5645 return false;
5646 }
5647
5648 static bool fake_host_busy(struct scsi_cmnd *scp)
5649 {
5650 return (sdebug_opts & SDEBUG_OPT_HOST_BUSY) &&
5651 (atomic_read(&sdebug_cmnd_count) % abs(sdebug_every_nth)) == 0;
5652 }
5653
5654 static int scsi_debug_queuecommand(struct Scsi_Host *shost,
5655 struct scsi_cmnd *scp)
5656 {
5657 u8 sdeb_i;
5658 struct scsi_device *sdp = scp->device;
5659 const struct opcode_info_t *oip;
5660 const struct opcode_info_t *r_oip;
5661 struct sdebug_dev_info *devip;
5662 u8 *cmd = scp->cmnd;
5663 int (*r_pfp)(struct scsi_cmnd *, struct sdebug_dev_info *);
5664 int (*pfp)(struct scsi_cmnd *, struct sdebug_dev_info *) = NULL;
5665 int k, na;
5666 int errsts = 0;
5667 u32 flags;
5668 u16 sa;
5669 u8 opcode = cmd[0];
5670 bool has_wlun_rl;
5671
5672 scsi_set_resid(scp, 0);
5673 if (sdebug_statistics)
5674 atomic_inc(&sdebug_cmnd_count);
5675 if (unlikely(sdebug_verbose &&
5676 !(SDEBUG_OPT_NO_CDB_NOISE & sdebug_opts))) {
5677 char b[120];
5678 int n, len, sb;
5679
5680 len = scp->cmd_len;
5681 sb = (int)sizeof(b);
5682 if (len > 32)
5683 strcpy(b, "too long, over 32 bytes");
5684 else {
5685 for (k = 0, n = 0; k < len && n < sb; ++k)
5686 n += scnprintf(b + n, sb - n, "%02x ",
5687 (u32)cmd[k]);
5688 }
5689 sdev_printk(KERN_INFO, sdp, "%s: tag=%#x, cmd %s\n", my_name,
5690 blk_mq_unique_tag(scp->request), b);
5691 }
5692 if (fake_host_busy(scp))
5693 return SCSI_MLQUEUE_HOST_BUSY;
5694 has_wlun_rl = (sdp->lun == SCSI_W_LUN_REPORT_LUNS);
5695 if (unlikely((sdp->lun >= sdebug_max_luns) && !has_wlun_rl))
5696 goto err_out;
5697
5698 sdeb_i = opcode_ind_arr[opcode]; /* fully mapped */
5699 oip = &opcode_info_arr[sdeb_i]; /* safe if table consistent */
5700 devip = (struct sdebug_dev_info *)sdp->hostdata;
5701 if (unlikely(!devip)) {
5702 devip = find_build_dev_info(sdp);
5703 if (NULL == devip)
5704 goto err_out;
5705 }
5706 na = oip->num_attached;
5707 r_pfp = oip->pfp;
5708 if (na) { /* multiple commands with this opcode */
5709 r_oip = oip;
5710 if (FF_SA & r_oip->flags) {
5711 if (F_SA_LOW & oip->flags)
5712 sa = 0x1f & cmd[1];
5713 else
5714 sa = get_unaligned_be16(cmd + 8);
5715 for (k = 0; k <= na; oip = r_oip->arrp + k++) {
5716 if (opcode == oip->opcode && sa == oip->sa)
5717 break;
5718 }
5719 } else { /* since no service action only check opcode */
5720 for (k = 0; k <= na; oip = r_oip->arrp + k++) {
5721 if (opcode == oip->opcode)
5722 break;
5723 }
5724 }
5725 if (k > na) {
5726 if (F_SA_LOW & r_oip->flags)
5727 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 4);
5728 else if (F_SA_HIGH & r_oip->flags)
5729 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 8, 7);
5730 else
5731 mk_sense_invalid_opcode(scp);
5732 goto check_cond;
5733 }
5734 } /* else (when na==0) we assume the oip is a match */
5735 flags = oip->flags;
5736 if (unlikely(F_INV_OP & flags)) {
5737 mk_sense_invalid_opcode(scp);
5738 goto check_cond;
5739 }
5740 if (unlikely(has_wlun_rl && !(F_RL_WLUN_OK & flags))) {
5741 if (sdebug_verbose)
5742 sdev_printk(KERN_INFO, sdp, "%s: Opcode 0x%x not%s\n",
5743 my_name, opcode, " supported for wlun");
5744 mk_sense_invalid_opcode(scp);
5745 goto check_cond;
5746 }
5747 if (unlikely(sdebug_strict)) { /* check cdb against mask */
5748 u8 rem;
5749 int j;
5750
5751 for (k = 1; k < oip->len_mask[0] && k < 16; ++k) {
5752 rem = ~oip->len_mask[k] & cmd[k];
5753 if (rem) {
5754 for (j = 7; j >= 0; --j, rem <<= 1) {
5755 if (0x80 & rem)
5756 break;
5757 }
5758 mk_sense_invalid_fld(scp, SDEB_IN_CDB, k, j);
5759 goto check_cond;
5760 }
5761 }
5762 }
5763 if (unlikely(!(F_SKIP_UA & flags) &&
5764 find_first_bit(devip->uas_bm,
5765 SDEBUG_NUM_UAS) != SDEBUG_NUM_UAS)) {
5766 errsts = make_ua(scp, devip);
5767 if (errsts)
5768 goto check_cond;
5769 }
5770 if (unlikely((F_M_ACCESS & flags) && atomic_read(&devip->stopped))) {
5771 mk_sense_buffer(scp, NOT_READY, LOGICAL_UNIT_NOT_READY, 0x2);
5772 if (sdebug_verbose)
5773 sdev_printk(KERN_INFO, sdp, "%s reports: Not ready: "
5774 "%s\n", my_name, "initializing command "
5775 "required");
5776 errsts = check_condition_result;
5777 goto fini;
5778 }
5779 if (sdebug_fake_rw && (F_FAKE_RW & flags))
5780 goto fini;
5781 if (unlikely(sdebug_every_nth)) {
5782 if (fake_timeout(scp))
5783 return 0; /* ignore command: make trouble */
5784 }
5785 if (likely(oip->pfp))
5786 pfp = oip->pfp; /* calls a resp_* function */
5787 else
5788 pfp = r_pfp; /* if leaf function ptr NULL, try the root's */
5789
5790 fini:
5791 if (F_DELAY_OVERR & flags)
5792 return schedule_resp(scp, devip, errsts, pfp, 0, 0);
5793 else if ((sdebug_jdelay || sdebug_ndelay) && (flags & F_LONG_DELAY)) {
5794 /*
5795 * If any delay is active, for F_SSU_DELAY want at least 1
5796 * second and if sdebug_jdelay>0 want a long delay of that
5797 * many seconds; for F_SYNC_DELAY want 1/20 of that.
5798 */
5799 int jdelay = (sdebug_jdelay < 2) ? 1 : sdebug_jdelay;
5800 int denom = (flags & F_SYNC_DELAY) ? 20 : 1;
5801
5802 jdelay = mult_frac(USER_HZ * jdelay, HZ, denom * USER_HZ);
5803 return schedule_resp(scp, devip, errsts, pfp, jdelay, 0);
5804 } else
5805 return schedule_resp(scp, devip, errsts, pfp, sdebug_jdelay,
5806 sdebug_ndelay);
5807 check_cond:
5808 return schedule_resp(scp, devip, check_condition_result, NULL, 0, 0);
5809 err_out:
5810 return schedule_resp(scp, NULL, DID_NO_CONNECT << 16, NULL, 0, 0);
5811 }
5812
5813 static struct scsi_host_template sdebug_driver_template = {
5814 .show_info = scsi_debug_show_info,
5815 .write_info = scsi_debug_write_info,
5816 .proc_name = sdebug_proc_name,
5817 .name = "SCSI DEBUG",
5818 .info = scsi_debug_info,
5819 .slave_alloc = scsi_debug_slave_alloc,
5820 .slave_configure = scsi_debug_slave_configure,
5821 .slave_destroy = scsi_debug_slave_destroy,
5822 .ioctl = scsi_debug_ioctl,
5823 .queuecommand = scsi_debug_queuecommand,
5824 .change_queue_depth = sdebug_change_qdepth,
5825 .eh_abort_handler = scsi_debug_abort,
5826 .eh_device_reset_handler = scsi_debug_device_reset,
5827 .eh_target_reset_handler = scsi_debug_target_reset,
5828 .eh_bus_reset_handler = scsi_debug_bus_reset,
5829 .eh_host_reset_handler = scsi_debug_host_reset,
5830 .can_queue = SDEBUG_CANQUEUE,
5831 .this_id = 7,
5832 .sg_tablesize = SG_MAX_SEGMENTS,
5833 .cmd_per_lun = DEF_CMD_PER_LUN,
5834 .max_sectors = -1U,
5835 .use_clustering = DISABLE_CLUSTERING,
5836 .module = THIS_MODULE,
5837 .track_queue_depth = 1,
5838 };
5839
5840 static int sdebug_driver_probe(struct device *dev)
5841 {
5842 int error = 0;
5843 struct sdebug_host_info *sdbg_host;
5844 struct Scsi_Host *hpnt;
5845 int hprot;
5846
5847 sdbg_host = to_sdebug_host(dev);
5848
5849 sdebug_driver_template.can_queue = sdebug_max_queue;
5850 if (sdebug_clustering)
5851 sdebug_driver_template.use_clustering = ENABLE_CLUSTERING;
5852 hpnt = scsi_host_alloc(&sdebug_driver_template, sizeof(sdbg_host));
5853 if (NULL == hpnt) {
5854 pr_err("scsi_host_alloc failed\n");
5855 error = -ENODEV;
5856 return error;
5857 }
5858 if (submit_queues > nr_cpu_ids) {
5859 pr_warn("%s: trim submit_queues (was %d) to nr_cpu_ids=%u\n",
5860 my_name, submit_queues, nr_cpu_ids);
5861 submit_queues = nr_cpu_ids;
5862 }
5863 /* Decide whether to tell scsi subsystem that we want mq */
5864 /* Following should give the same answer for each host */
5865 if (shost_use_blk_mq(hpnt))
5866 hpnt->nr_hw_queues = submit_queues;
5867
5868 sdbg_host->shost = hpnt;
5869 *((struct sdebug_host_info **)hpnt->hostdata) = sdbg_host;
5870 if ((hpnt->this_id >= 0) && (sdebug_num_tgts > hpnt->this_id))
5871 hpnt->max_id = sdebug_num_tgts + 1;
5872 else
5873 hpnt->max_id = sdebug_num_tgts;
5874 /* = sdebug_max_luns; */
5875 hpnt->max_lun = SCSI_W_LUN_REPORT_LUNS + 1;
5876
5877 hprot = 0;
5878
5879 switch (sdebug_dif) {
5880
5881 case T10_PI_TYPE1_PROTECTION:
5882 hprot = SHOST_DIF_TYPE1_PROTECTION;
5883 if (sdebug_dix)
5884 hprot |= SHOST_DIX_TYPE1_PROTECTION;
5885 break;
5886
5887 case T10_PI_TYPE2_PROTECTION:
5888 hprot = SHOST_DIF_TYPE2_PROTECTION;
5889 if (sdebug_dix)
5890 hprot |= SHOST_DIX_TYPE2_PROTECTION;
5891 break;
5892
5893 case T10_PI_TYPE3_PROTECTION:
5894 hprot = SHOST_DIF_TYPE3_PROTECTION;
5895 if (sdebug_dix)
5896 hprot |= SHOST_DIX_TYPE3_PROTECTION;
5897 break;
5898
5899 default:
5900 if (sdebug_dix)
5901 hprot |= SHOST_DIX_TYPE0_PROTECTION;
5902 break;
5903 }
5904
5905 scsi_host_set_prot(hpnt, hprot);
5906
5907 if (have_dif_prot || sdebug_dix)
5908 pr_info("host protection%s%s%s%s%s%s%s\n",
5909 (hprot & SHOST_DIF_TYPE1_PROTECTION) ? " DIF1" : "",
5910 (hprot & SHOST_DIF_TYPE2_PROTECTION) ? " DIF2" : "",
5911 (hprot & SHOST_DIF_TYPE3_PROTECTION) ? " DIF3" : "",
5912 (hprot & SHOST_DIX_TYPE0_PROTECTION) ? " DIX0" : "",
5913 (hprot & SHOST_DIX_TYPE1_PROTECTION) ? " DIX1" : "",
5914 (hprot & SHOST_DIX_TYPE2_PROTECTION) ? " DIX2" : "",
5915 (hprot & SHOST_DIX_TYPE3_PROTECTION) ? " DIX3" : "");
5916
5917 if (sdebug_guard == 1)
5918 scsi_host_set_guard(hpnt, SHOST_DIX_GUARD_IP);
5919 else
5920 scsi_host_set_guard(hpnt, SHOST_DIX_GUARD_CRC);
5921
5922 sdebug_verbose = !!(SDEBUG_OPT_NOISE & sdebug_opts);
5923 sdebug_any_injecting_opt = !!(SDEBUG_OPT_ALL_INJECTING & sdebug_opts);
5924 if (sdebug_every_nth) /* need stats counters for every_nth */
5925 sdebug_statistics = true;
5926 error = scsi_add_host(hpnt, &sdbg_host->dev);
5927 if (error) {
5928 pr_err("scsi_add_host failed\n");
5929 error = -ENODEV;
5930 scsi_host_put(hpnt);
5931 } else
5932 scsi_scan_host(hpnt);
5933
5934 return error;
5935 }
5936
5937 static int sdebug_driver_remove(struct device *dev)
5938 {
5939 struct sdebug_host_info *sdbg_host;
5940 struct sdebug_dev_info *sdbg_devinfo, *tmp;
5941
5942 sdbg_host = to_sdebug_host(dev);
5943
5944 if (!sdbg_host) {
5945 pr_err("Unable to locate host info\n");
5946 return -ENODEV;
5947 }
5948
5949 scsi_remove_host(sdbg_host->shost);
5950
5951 list_for_each_entry_safe(sdbg_devinfo, tmp, &sdbg_host->dev_info_list,
5952 dev_list) {
5953 list_del(&sdbg_devinfo->dev_list);
5954 kfree(sdbg_devinfo);
5955 }
5956
5957 scsi_host_put(sdbg_host->shost);
5958 return 0;
5959 }
5960
5961 static int pseudo_lld_bus_match(struct device *dev,
5962 struct device_driver *dev_driver)
5963 {
5964 return 1;
5965 }
5966
5967 static struct bus_type pseudo_lld_bus = {
5968 .name = "pseudo",
5969 .match = pseudo_lld_bus_match,
5970 .probe = sdebug_driver_probe,
5971 .remove = sdebug_driver_remove,
5972 .drv_groups = sdebug_drv_groups,
5973 };
Linux with added FPC-III support