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Merge tag 'rtc-4.8' of git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux
[mirror_ubuntu-bionic-kernel.git] / drivers / scsi / scsi_debug.c
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 - 2016 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
46 #include <net/checksum.h>
47
48 #include <asm/unaligned.h>
49
50 #include <scsi/scsi.h>
51 #include <scsi/scsi_cmnd.h>
52 #include <scsi/scsi_device.h>
53 #include <scsi/scsi_host.h>
54 #include <scsi/scsicam.h>
55 #include <scsi/scsi_eh.h>
56 #include <scsi/scsi_tcq.h>
57 #include <scsi/scsi_dbg.h>
58
59 #include "sd.h"
60 #include "scsi_logging.h"
61
62 /* make sure inq_product_rev string corresponds to this version */
63 #define SDEBUG_VERSION "1.86"
64 static const char *sdebug_version_date = "20160430";
65
66 #define MY_NAME "scsi_debug"
67
68 /* Additional Sense Code (ASC) */
69 #define NO_ADDITIONAL_SENSE 0x0
70 #define LOGICAL_UNIT_NOT_READY 0x4
71 #define LOGICAL_UNIT_COMMUNICATION_FAILURE 0x8
72 #define UNRECOVERED_READ_ERR 0x11
73 #define PARAMETER_LIST_LENGTH_ERR 0x1a
74 #define INVALID_OPCODE 0x20
75 #define LBA_OUT_OF_RANGE 0x21
76 #define INVALID_FIELD_IN_CDB 0x24
77 #define INVALID_FIELD_IN_PARAM_LIST 0x26
78 #define UA_RESET_ASC 0x29
79 #define UA_CHANGED_ASC 0x2a
80 #define TARGET_CHANGED_ASC 0x3f
81 #define LUNS_CHANGED_ASCQ 0x0e
82 #define INSUFF_RES_ASC 0x55
83 #define INSUFF_RES_ASCQ 0x3
84 #define POWER_ON_RESET_ASCQ 0x0
85 #define BUS_RESET_ASCQ 0x2 /* scsi bus reset occurred */
86 #define MODE_CHANGED_ASCQ 0x1 /* mode parameters changed */
87 #define CAPACITY_CHANGED_ASCQ 0x9
88 #define SAVING_PARAMS_UNSUP 0x39
89 #define TRANSPORT_PROBLEM 0x4b
90 #define THRESHOLD_EXCEEDED 0x5d
91 #define LOW_POWER_COND_ON 0x5e
92 #define MISCOMPARE_VERIFY_ASC 0x1d
93 #define MICROCODE_CHANGED_ASCQ 0x1 /* with TARGET_CHANGED_ASC */
94 #define MICROCODE_CHANGED_WO_RESET_ASCQ 0x16
95
96 /* Additional Sense Code Qualifier (ASCQ) */
97 #define ACK_NAK_TO 0x3
98
99 /* Default values for driver parameters */
100 #define DEF_NUM_HOST 1
101 #define DEF_NUM_TGTS 1
102 #define DEF_MAX_LUNS 1
103 /* With these defaults, this driver will make 1 host with 1 target
104 * (id 0) containing 1 logical unit (lun 0). That is 1 device.
105 */
106 #define DEF_ATO 1
107 #define DEF_JDELAY 1 /* if > 0 unit is a jiffy */
108 #define DEF_DEV_SIZE_MB 8
109 #define DEF_DIF 0
110 #define DEF_DIX 0
111 #define DEF_D_SENSE 0
112 #define DEF_EVERY_NTH 0
113 #define DEF_FAKE_RW 0
114 #define DEF_GUARD 0
115 #define DEF_HOST_LOCK 0
116 #define DEF_LBPU 0
117 #define DEF_LBPWS 0
118 #define DEF_LBPWS10 0
119 #define DEF_LBPRZ 1
120 #define DEF_LOWEST_ALIGNED 0
121 #define DEF_NDELAY 0 /* if > 0 unit is a nanosecond */
122 #define DEF_NO_LUN_0 0
123 #define DEF_NUM_PARTS 0
124 #define DEF_OPTS 0
125 #define DEF_OPT_BLKS 1024
126 #define DEF_PHYSBLK_EXP 0
127 #define DEF_PTYPE TYPE_DISK
128 #define DEF_REMOVABLE false
129 #define DEF_SCSI_LEVEL 7 /* INQUIRY, byte2 [6->SPC-4; 7->SPC-5] */
130 #define DEF_SECTOR_SIZE 512
131 #define DEF_UNMAP_ALIGNMENT 0
132 #define DEF_UNMAP_GRANULARITY 1
133 #define DEF_UNMAP_MAX_BLOCKS 0xFFFFFFFF
134 #define DEF_UNMAP_MAX_DESC 256
135 #define DEF_VIRTUAL_GB 0
136 #define DEF_VPD_USE_HOSTNO 1
137 #define DEF_WRITESAME_LENGTH 0xFFFF
138 #define DEF_STRICT 0
139 #define DEF_STATISTICS false
140 #define DEF_SUBMIT_QUEUES 1
141 #define DEF_UUID_CTL 0
142 #define JDELAY_OVERRIDDEN -9999
143
144 #define SDEBUG_LUN_0_VAL 0
145
146 /* bit mask values for sdebug_opts */
147 #define SDEBUG_OPT_NOISE 1
148 #define SDEBUG_OPT_MEDIUM_ERR 2
149 #define SDEBUG_OPT_TIMEOUT 4
150 #define SDEBUG_OPT_RECOVERED_ERR 8
151 #define SDEBUG_OPT_TRANSPORT_ERR 16
152 #define SDEBUG_OPT_DIF_ERR 32
153 #define SDEBUG_OPT_DIX_ERR 64
154 #define SDEBUG_OPT_MAC_TIMEOUT 128
155 #define SDEBUG_OPT_SHORT_TRANSFER 0x100
156 #define SDEBUG_OPT_Q_NOISE 0x200
157 #define SDEBUG_OPT_ALL_TSF 0x400
158 #define SDEBUG_OPT_RARE_TSF 0x800
159 #define SDEBUG_OPT_N_WCE 0x1000
160 #define SDEBUG_OPT_RESET_NOISE 0x2000
161 #define SDEBUG_OPT_NO_CDB_NOISE 0x4000
162 #define SDEBUG_OPT_ALL_NOISE (SDEBUG_OPT_NOISE | SDEBUG_OPT_Q_NOISE | \
163 SDEBUG_OPT_RESET_NOISE)
164 #define SDEBUG_OPT_ALL_INJECTING (SDEBUG_OPT_RECOVERED_ERR | \
165 SDEBUG_OPT_TRANSPORT_ERR | \
166 SDEBUG_OPT_DIF_ERR | SDEBUG_OPT_DIX_ERR | \
167 SDEBUG_OPT_SHORT_TRANSFER)
168 /* When "every_nth" > 0 then modulo "every_nth" commands:
169 * - a missing response is simulated if SDEBUG_OPT_TIMEOUT is set
170 * - a RECOVERED_ERROR is simulated on successful read and write
171 * commands if SDEBUG_OPT_RECOVERED_ERR is set.
172 * - a TRANSPORT_ERROR is simulated on successful read and write
173 * commands if SDEBUG_OPT_TRANSPORT_ERR is set.
174 *
175 * When "every_nth" < 0 then after "- every_nth" commands:
176 * - a missing response is simulated if SDEBUG_OPT_TIMEOUT is set
177 * - a RECOVERED_ERROR is simulated on successful read and write
178 * commands if SDEBUG_OPT_RECOVERED_ERR is set.
179 * - a TRANSPORT_ERROR is simulated on successful read and write
180 * commands if _DEBUG_OPT_TRANSPORT_ERR is set.
181 * This will continue on every subsequent command until some other action
182 * occurs (e.g. the user * writing a new value (other than -1 or 1) to
183 * every_nth via sysfs).
184 */
185
186 /* As indicated in SAM-5 and SPC-4 Unit Attentions (UAs) are returned in
187 * priority order. In the subset implemented here lower numbers have higher
188 * priority. The UA numbers should be a sequence starting from 0 with
189 * SDEBUG_NUM_UAS being 1 higher than the highest numbered UA. */
190 #define SDEBUG_UA_POR 0 /* Power on, reset, or bus device reset */
191 #define SDEBUG_UA_BUS_RESET 1
192 #define SDEBUG_UA_MODE_CHANGED 2
193 #define SDEBUG_UA_CAPACITY_CHANGED 3
194 #define SDEBUG_UA_LUNS_CHANGED 4
195 #define SDEBUG_UA_MICROCODE_CHANGED 5 /* simulate firmware change */
196 #define SDEBUG_UA_MICROCODE_CHANGED_WO_RESET 6
197 #define SDEBUG_NUM_UAS 7
198
199 /* when 1==SDEBUG_OPT_MEDIUM_ERR, a medium error is simulated at this
200 * sector on read commands: */
201 #define OPT_MEDIUM_ERR_ADDR 0x1234 /* that's sector 4660 in decimal */
202 #define OPT_MEDIUM_ERR_NUM 10 /* number of consecutive medium errs */
203
204 /* If REPORT LUNS has luns >= 256 it can choose "flat space" (value 1)
205 * or "peripheral device" addressing (value 0) */
206 #define SAM2_LUN_ADDRESS_METHOD 0
207
208 /* SDEBUG_CANQUEUE is the maximum number of commands that can be queued
209 * (for response) per submit queue at one time. Can be reduced by max_queue
210 * option. Command responses are not queued when jdelay=0 and ndelay=0. The
211 * per-device DEF_CMD_PER_LUN can be changed via sysfs:
212 * /sys/class/scsi_device/<h:c:t:l>/device/queue_depth
213 * but cannot exceed SDEBUG_CANQUEUE .
214 */
215 #define SDEBUG_CANQUEUE_WORDS 3 /* a WORD is bits in a long */
216 #define SDEBUG_CANQUEUE (SDEBUG_CANQUEUE_WORDS * BITS_PER_LONG)
217 #define DEF_CMD_PER_LUN 255
218
219 #define F_D_IN 1
220 #define F_D_OUT 2
221 #define F_D_OUT_MAYBE 4 /* WRITE SAME, NDOB bit */
222 #define F_D_UNKN 8
223 #define F_RL_WLUN_OK 0x10
224 #define F_SKIP_UA 0x20
225 #define F_DELAY_OVERR 0x40
226 #define F_SA_LOW 0x80 /* cdb byte 1, bits 4 to 0 */
227 #define F_SA_HIGH 0x100 /* as used by variable length cdbs */
228 #define F_INV_OP 0x200
229 #define F_FAKE_RW 0x400
230 #define F_M_ACCESS 0x800 /* media access */
231
232 #define FF_RESPOND (F_RL_WLUN_OK | F_SKIP_UA | F_DELAY_OVERR)
233 #define FF_DIRECT_IO (F_M_ACCESS | F_FAKE_RW)
234 #define FF_SA (F_SA_HIGH | F_SA_LOW)
235
236 #define SDEBUG_MAX_PARTS 4
237
238 #define SDEBUG_MAX_CMD_LEN 32
239
240
241 struct sdebug_dev_info {
242 struct list_head dev_list;
243 unsigned int channel;
244 unsigned int target;
245 u64 lun;
246 uuid_be lu_name;
247 struct sdebug_host_info *sdbg_host;
248 unsigned long uas_bm[1];
249 atomic_t num_in_q;
250 atomic_t stopped;
251 bool used;
252 };
253
254 struct sdebug_host_info {
255 struct list_head host_list;
256 struct Scsi_Host *shost;
257 struct device dev;
258 struct list_head dev_info_list;
259 };
260
261 #define to_sdebug_host(d) \
262 container_of(d, struct sdebug_host_info, dev)
263
264 struct sdebug_defer {
265 struct hrtimer hrt;
266 struct execute_work ew;
267 int sqa_idx; /* index of sdebug_queue array */
268 int qc_idx; /* index of sdebug_queued_cmd array within sqa_idx */
269 int issuing_cpu;
270 };
271
272 struct sdebug_queued_cmd {
273 /* corresponding bit set in in_use_bm[] in owning struct sdebug_queue
274 * instance indicates this slot is in use.
275 */
276 struct sdebug_defer *sd_dp;
277 struct scsi_cmnd *a_cmnd;
278 unsigned int inj_recovered:1;
279 unsigned int inj_transport:1;
280 unsigned int inj_dif:1;
281 unsigned int inj_dix:1;
282 unsigned int inj_short:1;
283 };
284
285 struct sdebug_queue {
286 struct sdebug_queued_cmd qc_arr[SDEBUG_CANQUEUE];
287 unsigned long in_use_bm[SDEBUG_CANQUEUE_WORDS];
288 spinlock_t qc_lock;
289 atomic_t blocked; /* to temporarily stop more being queued */
290 };
291
292 static atomic_t sdebug_cmnd_count; /* number of incoming commands */
293 static atomic_t sdebug_completions; /* count of deferred completions */
294 static atomic_t sdebug_miss_cpus; /* submission + completion cpus differ */
295 static atomic_t sdebug_a_tsf; /* 'almost task set full' counter */
296
297 struct opcode_info_t {
298 u8 num_attached; /* 0 if this is it (i.e. a leaf); use 0xff */
299 /* for terminating element */
300 u8 opcode; /* if num_attached > 0, preferred */
301 u16 sa; /* service action */
302 u32 flags; /* OR-ed set of SDEB_F_* */
303 int (*pfp)(struct scsi_cmnd *, struct sdebug_dev_info *);
304 const struct opcode_info_t *arrp; /* num_attached elements or NULL */
305 u8 len_mask[16]; /* len=len_mask[0], then mask for cdb[1]... */
306 /* ignore cdb bytes after position 15 */
307 };
308
309 /* SCSI opcodes (first byte of cdb) of interest mapped onto these indexes */
310 enum sdeb_opcode_index {
311 SDEB_I_INVALID_OPCODE = 0,
312 SDEB_I_INQUIRY = 1,
313 SDEB_I_REPORT_LUNS = 2,
314 SDEB_I_REQUEST_SENSE = 3,
315 SDEB_I_TEST_UNIT_READY = 4,
316 SDEB_I_MODE_SENSE = 5, /* 6, 10 */
317 SDEB_I_MODE_SELECT = 6, /* 6, 10 */
318 SDEB_I_LOG_SENSE = 7,
319 SDEB_I_READ_CAPACITY = 8, /* 10; 16 is in SA_IN(16) */
320 SDEB_I_READ = 9, /* 6, 10, 12, 16 */
321 SDEB_I_WRITE = 10, /* 6, 10, 12, 16 */
322 SDEB_I_START_STOP = 11,
323 SDEB_I_SERV_ACT_IN = 12, /* 12, 16 */
324 SDEB_I_SERV_ACT_OUT = 13, /* 12, 16 */
325 SDEB_I_MAINT_IN = 14,
326 SDEB_I_MAINT_OUT = 15,
327 SDEB_I_VERIFY = 16, /* 10 only */
328 SDEB_I_VARIABLE_LEN = 17,
329 SDEB_I_RESERVE = 18, /* 6, 10 */
330 SDEB_I_RELEASE = 19, /* 6, 10 */
331 SDEB_I_ALLOW_REMOVAL = 20, /* PREVENT ALLOW MEDIUM REMOVAL */
332 SDEB_I_REZERO_UNIT = 21, /* REWIND in SSC */
333 SDEB_I_ATA_PT = 22, /* 12, 16 */
334 SDEB_I_SEND_DIAG = 23,
335 SDEB_I_UNMAP = 24,
336 SDEB_I_XDWRITEREAD = 25, /* 10 only */
337 SDEB_I_WRITE_BUFFER = 26,
338 SDEB_I_WRITE_SAME = 27, /* 10, 16 */
339 SDEB_I_SYNC_CACHE = 28, /* 10 only */
340 SDEB_I_COMP_WRITE = 29,
341 SDEB_I_LAST_ELEMENT = 30, /* keep this last */
342 };
343
344
345 static const unsigned char opcode_ind_arr[256] = {
346 /* 0x0; 0x0->0x1f: 6 byte cdbs */
347 SDEB_I_TEST_UNIT_READY, SDEB_I_REZERO_UNIT, 0, SDEB_I_REQUEST_SENSE,
348 0, 0, 0, 0,
349 SDEB_I_READ, 0, SDEB_I_WRITE, 0, 0, 0, 0, 0,
350 0, 0, SDEB_I_INQUIRY, 0, 0, SDEB_I_MODE_SELECT, SDEB_I_RESERVE,
351 SDEB_I_RELEASE,
352 0, 0, SDEB_I_MODE_SENSE, SDEB_I_START_STOP, 0, SDEB_I_SEND_DIAG,
353 SDEB_I_ALLOW_REMOVAL, 0,
354 /* 0x20; 0x20->0x3f: 10 byte cdbs */
355 0, 0, 0, 0, 0, SDEB_I_READ_CAPACITY, 0, 0,
356 SDEB_I_READ, 0, SDEB_I_WRITE, 0, 0, 0, 0, SDEB_I_VERIFY,
357 0, 0, 0, 0, 0, SDEB_I_SYNC_CACHE, 0, 0,
358 0, 0, 0, SDEB_I_WRITE_BUFFER, 0, 0, 0, 0,
359 /* 0x40; 0x40->0x5f: 10 byte cdbs */
360 0, SDEB_I_WRITE_SAME, SDEB_I_UNMAP, 0, 0, 0, 0, 0,
361 0, 0, 0, 0, 0, SDEB_I_LOG_SENSE, 0, 0,
362 0, 0, 0, SDEB_I_XDWRITEREAD, 0, SDEB_I_MODE_SELECT, SDEB_I_RESERVE,
363 SDEB_I_RELEASE,
364 0, 0, SDEB_I_MODE_SENSE, 0, 0, 0, 0, 0,
365 /* 0x60; 0x60->0x7d are reserved, 0x7e is "extended cdb" */
366 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
367 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
368 0, SDEB_I_VARIABLE_LEN,
369 /* 0x80; 0x80->0x9f: 16 byte cdbs */
370 0, 0, 0, 0, 0, SDEB_I_ATA_PT, 0, 0,
371 SDEB_I_READ, SDEB_I_COMP_WRITE, SDEB_I_WRITE, 0, 0, 0, 0, 0,
372 0, 0, 0, SDEB_I_WRITE_SAME, 0, 0, 0, 0,
373 0, 0, 0, 0, 0, 0, SDEB_I_SERV_ACT_IN, SDEB_I_SERV_ACT_OUT,
374 /* 0xa0; 0xa0->0xbf: 12 byte cdbs */
375 SDEB_I_REPORT_LUNS, SDEB_I_ATA_PT, 0, SDEB_I_MAINT_IN,
376 SDEB_I_MAINT_OUT, 0, 0, 0,
377 SDEB_I_READ, SDEB_I_SERV_ACT_OUT, SDEB_I_WRITE, SDEB_I_SERV_ACT_IN,
378 0, 0, 0, 0,
379 0, 0, 0, 0, 0, 0, 0, 0,
380 0, 0, 0, 0, 0, 0, 0, 0,
381 /* 0xc0; 0xc0->0xff: vendor specific */
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, 0, 0,
384 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
385 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
386 };
387
388 static int resp_inquiry(struct scsi_cmnd *, struct sdebug_dev_info *);
389 static int resp_report_luns(struct scsi_cmnd *, struct sdebug_dev_info *);
390 static int resp_requests(struct scsi_cmnd *, struct sdebug_dev_info *);
391 static int resp_mode_sense(struct scsi_cmnd *, struct sdebug_dev_info *);
392 static int resp_mode_select(struct scsi_cmnd *, struct sdebug_dev_info *);
393 static int resp_log_sense(struct scsi_cmnd *, struct sdebug_dev_info *);
394 static int resp_readcap(struct scsi_cmnd *, struct sdebug_dev_info *);
395 static int resp_read_dt0(struct scsi_cmnd *, struct sdebug_dev_info *);
396 static int resp_write_dt0(struct scsi_cmnd *, struct sdebug_dev_info *);
397 static int resp_start_stop(struct scsi_cmnd *, struct sdebug_dev_info *);
398 static int resp_readcap16(struct scsi_cmnd *, struct sdebug_dev_info *);
399 static int resp_get_lba_status(struct scsi_cmnd *, struct sdebug_dev_info *);
400 static int resp_report_tgtpgs(struct scsi_cmnd *, struct sdebug_dev_info *);
401 static int resp_unmap(struct scsi_cmnd *, struct sdebug_dev_info *);
402 static int resp_rsup_opcodes(struct scsi_cmnd *, struct sdebug_dev_info *);
403 static int resp_rsup_tmfs(struct scsi_cmnd *, struct sdebug_dev_info *);
404 static int resp_write_same_10(struct scsi_cmnd *, struct sdebug_dev_info *);
405 static int resp_write_same_16(struct scsi_cmnd *, struct sdebug_dev_info *);
406 static int resp_xdwriteread_10(struct scsi_cmnd *, struct sdebug_dev_info *);
407 static int resp_comp_write(struct scsi_cmnd *, struct sdebug_dev_info *);
408 static int resp_write_buffer(struct scsi_cmnd *, struct sdebug_dev_info *);
409
410 static const struct opcode_info_t msense_iarr[1] = {
411 {0, 0x1a, 0, F_D_IN, NULL, NULL,
412 {6, 0xe8, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
413 };
414
415 static const struct opcode_info_t mselect_iarr[1] = {
416 {0, 0x15, 0, F_D_OUT, NULL, NULL,
417 {6, 0xf1, 0, 0, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
418 };
419
420 static const struct opcode_info_t read_iarr[3] = {
421 {0, 0x28, 0, F_D_IN | FF_DIRECT_IO, resp_read_dt0, NULL,/* READ(10) */
422 {10, 0xff, 0xff, 0xff, 0xff, 0xff, 0x1f, 0xff, 0xff, 0xc7, 0, 0,
423 0, 0, 0, 0} },
424 {0, 0x8, 0, F_D_IN | FF_DIRECT_IO, resp_read_dt0, NULL, /* READ(6) */
425 {6, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
426 {0, 0xa8, 0, F_D_IN | FF_DIRECT_IO, resp_read_dt0, NULL,/* READ(12) */
427 {12, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x9f,
428 0xc7, 0, 0, 0, 0} },
429 };
430
431 static const struct opcode_info_t write_iarr[3] = {
432 {0, 0x2a, 0, F_D_OUT | FF_DIRECT_IO, resp_write_dt0, NULL, /* 10 */
433 {10, 0xfb, 0xff, 0xff, 0xff, 0xff, 0x1f, 0xff, 0xff, 0xc7, 0, 0,
434 0, 0, 0, 0} },
435 {0, 0xa, 0, F_D_OUT | FF_DIRECT_IO, resp_write_dt0, NULL, /* 6 */
436 {6, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
437 {0, 0xaa, 0, F_D_OUT | FF_DIRECT_IO, resp_write_dt0, NULL, /* 12 */
438 {12, 0xfb, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x9f,
439 0xc7, 0, 0, 0, 0} },
440 };
441
442 static const struct opcode_info_t sa_in_iarr[1] = {
443 {0, 0x9e, 0x12, F_SA_LOW | F_D_IN, resp_get_lba_status, NULL,
444 {16, 0x12, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
445 0xff, 0xff, 0xff, 0, 0xc7} },
446 };
447
448 static const struct opcode_info_t vl_iarr[1] = { /* VARIABLE LENGTH */
449 {0, 0x7f, 0xb, F_SA_HIGH | F_D_OUT | FF_DIRECT_IO, resp_write_dt0,
450 NULL, {32, 0xc7, 0, 0, 0, 0, 0x1f, 0x18, 0x0, 0xb, 0xfa,
451 0, 0xff, 0xff, 0xff, 0xff} }, /* WRITE(32) */
452 };
453
454 static const struct opcode_info_t maint_in_iarr[2] = {
455 {0, 0xa3, 0xc, F_SA_LOW | F_D_IN, resp_rsup_opcodes, NULL,
456 {12, 0xc, 0x87, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0,
457 0xc7, 0, 0, 0, 0} },
458 {0, 0xa3, 0xd, F_SA_LOW | F_D_IN, resp_rsup_tmfs, NULL,
459 {12, 0xd, 0x80, 0, 0, 0, 0xff, 0xff, 0xff, 0xff, 0, 0xc7, 0, 0,
460 0, 0} },
461 };
462
463 static const struct opcode_info_t write_same_iarr[1] = {
464 {0, 0x93, 0, F_D_OUT_MAYBE | FF_DIRECT_IO, resp_write_same_16, NULL,
465 {16, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
466 0xff, 0xff, 0xff, 0x1f, 0xc7} },
467 };
468
469 static const struct opcode_info_t reserve_iarr[1] = {
470 {0, 0x16, 0, F_D_OUT, NULL, NULL, /* RESERVE(6) */
471 {6, 0x1f, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
472 };
473
474 static const struct opcode_info_t release_iarr[1] = {
475 {0, 0x17, 0, F_D_OUT, NULL, NULL, /* RELEASE(6) */
476 {6, 0x1f, 0xff, 0, 0, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
477 };
478
479
480 /* This array is accessed via SDEB_I_* values. Make sure all are mapped,
481 * plus the terminating elements for logic that scans this table such as
482 * REPORT SUPPORTED OPERATION CODES. */
483 static const struct opcode_info_t opcode_info_arr[SDEB_I_LAST_ELEMENT + 1] = {
484 /* 0 */
485 {0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL,
486 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
487 {0, 0x12, 0, FF_RESPOND | F_D_IN, resp_inquiry, NULL,
488 {6, 0xe3, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
489 {0, 0xa0, 0, FF_RESPOND | F_D_IN, resp_report_luns, NULL,
490 {12, 0xe3, 0xff, 0, 0, 0, 0xff, 0xff, 0xff, 0xff, 0, 0xc7, 0, 0,
491 0, 0} },
492 {0, 0x3, 0, FF_RESPOND | F_D_IN, resp_requests, NULL,
493 {6, 0xe1, 0, 0, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
494 {0, 0x0, 0, F_M_ACCESS | F_RL_WLUN_OK, NULL, NULL,/* TEST UNIT READY */
495 {6, 0, 0, 0, 0, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
496 {1, 0x5a, 0, F_D_IN, resp_mode_sense, msense_iarr,
497 {10, 0xf8, 0xff, 0xff, 0, 0, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0,
498 0} },
499 {1, 0x55, 0, F_D_OUT, resp_mode_select, mselect_iarr,
500 {10, 0xf1, 0, 0, 0, 0, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0} },
501 {0, 0x4d, 0, F_D_IN, resp_log_sense, NULL,
502 {10, 0xe3, 0xff, 0xff, 0, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0,
503 0, 0, 0} },
504 {0, 0x25, 0, F_D_IN, resp_readcap, NULL,
505 {10, 0xe1, 0xff, 0xff, 0xff, 0xff, 0, 0, 0x1, 0xc7, 0, 0, 0, 0,
506 0, 0} },
507 {3, 0x88, 0, F_D_IN | FF_DIRECT_IO, resp_read_dt0, read_iarr,
508 {16, 0xfe, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
509 0xff, 0xff, 0xff, 0x9f, 0xc7} }, /* READ(16) */
510 /* 10 */
511 {3, 0x8a, 0, F_D_OUT | FF_DIRECT_IO, resp_write_dt0, write_iarr,
512 {16, 0xfa, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
513 0xff, 0xff, 0xff, 0x9f, 0xc7} }, /* WRITE(16) */
514 {0, 0x1b, 0, 0, resp_start_stop, NULL, /* START STOP UNIT */
515 {6, 0x1, 0, 0xf, 0xf7, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
516 {1, 0x9e, 0x10, F_SA_LOW | F_D_IN, resp_readcap16, sa_in_iarr,
517 {16, 0x10, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
518 0xff, 0xff, 0xff, 0x1, 0xc7} }, /* READ CAPACITY(16) */
519 {0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL, /* SA OUT */
520 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
521 {2, 0xa3, 0xa, F_SA_LOW | F_D_IN, resp_report_tgtpgs, maint_in_iarr,
522 {12, 0xea, 0, 0, 0, 0, 0xff, 0xff, 0xff, 0xff, 0, 0xc7, 0, 0, 0,
523 0} },
524 {0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL, /* MAINT OUT */
525 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
526 {0, 0x2f, 0, F_D_OUT_MAYBE | FF_DIRECT_IO, NULL, NULL, /* VERIFY(10) */
527 {10, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc7,
528 0, 0, 0, 0, 0, 0} },
529 {1, 0x7f, 0x9, F_SA_HIGH | F_D_IN | FF_DIRECT_IO, resp_read_dt0,
530 vl_iarr, {32, 0xc7, 0, 0, 0, 0, 0x1f, 0x18, 0x0, 0x9, 0xfe, 0,
531 0xff, 0xff, 0xff, 0xff} },/* VARIABLE LENGTH, READ(32) */
532 {1, 0x56, 0, F_D_OUT, NULL, reserve_iarr, /* RESERVE(10) */
533 {10, 0xff, 0xff, 0xff, 0, 0, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0,
534 0} },
535 {1, 0x57, 0, F_D_OUT, NULL, release_iarr, /* RELEASE(10) */
536 {10, 0x13, 0xff, 0xff, 0, 0, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0,
537 0} },
538 /* 20 */
539 {0, 0x1e, 0, 0, NULL, NULL, /* ALLOW REMOVAL */
540 {6, 0, 0, 0, 0x3, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
541 {0, 0x1, 0, 0, resp_start_stop, NULL, /* REWIND ?? */
542 {6, 0x1, 0, 0, 0, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
543 {0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL, /* ATA_PT */
544 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
545 {0, 0x1d, F_D_OUT, 0, NULL, NULL, /* SEND DIAGNOSTIC */
546 {6, 0xf7, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
547 {0, 0x42, 0, F_D_OUT | FF_DIRECT_IO, resp_unmap, NULL, /* UNMAP */
548 {10, 0x1, 0, 0, 0, 0, 0x1f, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0} },
549 {0, 0x53, 0, F_D_IN | F_D_OUT | FF_DIRECT_IO, resp_xdwriteread_10,
550 NULL, {10, 0xff, 0xff, 0xff, 0xff, 0xff, 0x1f, 0xff, 0xff, 0xc7,
551 0, 0, 0, 0, 0, 0} },
552 {0, 0x3b, 0, F_D_OUT_MAYBE, resp_write_buffer, NULL,
553 {10, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0,
554 0, 0, 0, 0} }, /* WRITE_BUFFER */
555 {1, 0x41, 0, F_D_OUT_MAYBE | FF_DIRECT_IO, resp_write_same_10,
556 write_same_iarr, {10, 0xff, 0xff, 0xff, 0xff, 0xff, 0x1f, 0xff,
557 0xff, 0xc7, 0, 0, 0, 0, 0, 0} },
558 {0, 0x35, 0, F_DELAY_OVERR | FF_DIRECT_IO, NULL, NULL, /* SYNC_CACHE */
559 {10, 0x7, 0xff, 0xff, 0xff, 0xff, 0x1f, 0xff, 0xff, 0xc7, 0, 0,
560 0, 0, 0, 0} },
561 {0, 0x89, 0, F_D_OUT | FF_DIRECT_IO, resp_comp_write, NULL,
562 {16, 0xf8, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0, 0,
563 0, 0xff, 0x1f, 0xc7} }, /* COMPARE AND WRITE */
564
565 /* 30 */
566 {0xff, 0, 0, 0, NULL, NULL, /* terminating element */
567 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
568 };
569
570 static int sdebug_add_host = DEF_NUM_HOST;
571 static int sdebug_ato = DEF_ATO;
572 static int sdebug_jdelay = DEF_JDELAY; /* if > 0 then unit is jiffies */
573 static int sdebug_dev_size_mb = DEF_DEV_SIZE_MB;
574 static int sdebug_dif = DEF_DIF;
575 static int sdebug_dix = DEF_DIX;
576 static int sdebug_dsense = DEF_D_SENSE;
577 static int sdebug_every_nth = DEF_EVERY_NTH;
578 static int sdebug_fake_rw = DEF_FAKE_RW;
579 static unsigned int sdebug_guard = DEF_GUARD;
580 static int sdebug_lowest_aligned = DEF_LOWEST_ALIGNED;
581 static int sdebug_max_luns = DEF_MAX_LUNS;
582 static int sdebug_max_queue = SDEBUG_CANQUEUE; /* per submit queue */
583 static atomic_t retired_max_queue; /* if > 0 then was prior max_queue */
584 static int sdebug_ndelay = DEF_NDELAY; /* if > 0 then unit is nanoseconds */
585 static int sdebug_no_lun_0 = DEF_NO_LUN_0;
586 static int sdebug_no_uld;
587 static int sdebug_num_parts = DEF_NUM_PARTS;
588 static int sdebug_num_tgts = DEF_NUM_TGTS; /* targets per host */
589 static int sdebug_opt_blks = DEF_OPT_BLKS;
590 static int sdebug_opts = DEF_OPTS;
591 static int sdebug_physblk_exp = DEF_PHYSBLK_EXP;
592 static int sdebug_ptype = DEF_PTYPE; /* SCSI peripheral device type */
593 static int sdebug_scsi_level = DEF_SCSI_LEVEL;
594 static int sdebug_sector_size = DEF_SECTOR_SIZE;
595 static int sdebug_virtual_gb = DEF_VIRTUAL_GB;
596 static int sdebug_vpd_use_hostno = DEF_VPD_USE_HOSTNO;
597 static unsigned int sdebug_lbpu = DEF_LBPU;
598 static unsigned int sdebug_lbpws = DEF_LBPWS;
599 static unsigned int sdebug_lbpws10 = DEF_LBPWS10;
600 static unsigned int sdebug_lbprz = DEF_LBPRZ;
601 static unsigned int sdebug_unmap_alignment = DEF_UNMAP_ALIGNMENT;
602 static unsigned int sdebug_unmap_granularity = DEF_UNMAP_GRANULARITY;
603 static unsigned int sdebug_unmap_max_blocks = DEF_UNMAP_MAX_BLOCKS;
604 static unsigned int sdebug_unmap_max_desc = DEF_UNMAP_MAX_DESC;
605 static unsigned int sdebug_write_same_length = DEF_WRITESAME_LENGTH;
606 static int sdebug_uuid_ctl = DEF_UUID_CTL;
607 static bool sdebug_removable = DEF_REMOVABLE;
608 static bool sdebug_clustering;
609 static bool sdebug_host_lock = DEF_HOST_LOCK;
610 static bool sdebug_strict = DEF_STRICT;
611 static bool sdebug_any_injecting_opt;
612 static bool sdebug_verbose;
613 static bool have_dif_prot;
614 static bool sdebug_statistics = DEF_STATISTICS;
615 static bool sdebug_mq_active;
616
617 static unsigned int sdebug_store_sectors;
618 static sector_t sdebug_capacity; /* in sectors */
619
620 /* old BIOS stuff, kernel may get rid of them but some mode sense pages
621 may still need them */
622 static int sdebug_heads; /* heads per disk */
623 static int sdebug_cylinders_per; /* cylinders per surface */
624 static int sdebug_sectors_per; /* sectors per cylinder */
625
626 static LIST_HEAD(sdebug_host_list);
627 static DEFINE_SPINLOCK(sdebug_host_list_lock);
628
629 static unsigned char *fake_storep; /* ramdisk storage */
630 static struct sd_dif_tuple *dif_storep; /* protection info */
631 static void *map_storep; /* provisioning map */
632
633 static unsigned long map_size;
634 static int num_aborts;
635 static int num_dev_resets;
636 static int num_target_resets;
637 static int num_bus_resets;
638 static int num_host_resets;
639 static int dix_writes;
640 static int dix_reads;
641 static int dif_errors;
642
643 static int submit_queues = DEF_SUBMIT_QUEUES; /* > 1 for multi-queue (mq) */
644 static struct sdebug_queue *sdebug_q_arr; /* ptr to array of submit queues */
645
646 static DEFINE_RWLOCK(atomic_rw);
647
648 static char sdebug_proc_name[] = MY_NAME;
649 static const char *my_name = MY_NAME;
650
651 static struct bus_type pseudo_lld_bus;
652
653 static struct device_driver sdebug_driverfs_driver = {
654 .name = sdebug_proc_name,
655 .bus = &pseudo_lld_bus,
656 };
657
658 static const int check_condition_result =
659 (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
660
661 static const int illegal_condition_result =
662 (DRIVER_SENSE << 24) | (DID_ABORT << 16) | SAM_STAT_CHECK_CONDITION;
663
664 static const int device_qfull_result =
665 (DID_OK << 16) | (COMMAND_COMPLETE << 8) | SAM_STAT_TASK_SET_FULL;
666
667
668 /* Only do the extra work involved in logical block provisioning if one or
669 * more of the lbpu, lbpws or lbpws10 parameters are given and we are doing
670 * real reads and writes (i.e. not skipping them for speed).
671 */
672 static inline bool scsi_debug_lbp(void)
673 {
674 return 0 == sdebug_fake_rw &&
675 (sdebug_lbpu || sdebug_lbpws || sdebug_lbpws10);
676 }
677
678 static void *fake_store(unsigned long long lba)
679 {
680 lba = do_div(lba, sdebug_store_sectors);
681
682 return fake_storep + lba * sdebug_sector_size;
683 }
684
685 static struct sd_dif_tuple *dif_store(sector_t sector)
686 {
687 sector = sector_div(sector, sdebug_store_sectors);
688
689 return dif_storep + sector;
690 }
691
692 static void sdebug_max_tgts_luns(void)
693 {
694 struct sdebug_host_info *sdbg_host;
695 struct Scsi_Host *hpnt;
696
697 spin_lock(&sdebug_host_list_lock);
698 list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) {
699 hpnt = sdbg_host->shost;
700 if ((hpnt->this_id >= 0) &&
701 (sdebug_num_tgts > hpnt->this_id))
702 hpnt->max_id = sdebug_num_tgts + 1;
703 else
704 hpnt->max_id = sdebug_num_tgts;
705 /* sdebug_max_luns; */
706 hpnt->max_lun = SCSI_W_LUN_REPORT_LUNS + 1;
707 }
708 spin_unlock(&sdebug_host_list_lock);
709 }
710
711 enum sdeb_cmd_data {SDEB_IN_DATA = 0, SDEB_IN_CDB = 1};
712
713 /* Set in_bit to -1 to indicate no bit position of invalid field */
714 static void mk_sense_invalid_fld(struct scsi_cmnd *scp,
715 enum sdeb_cmd_data c_d,
716 int in_byte, int in_bit)
717 {
718 unsigned char *sbuff;
719 u8 sks[4];
720 int sl, asc;
721
722 sbuff = scp->sense_buffer;
723 if (!sbuff) {
724 sdev_printk(KERN_ERR, scp->device,
725 "%s: sense_buffer is NULL\n", __func__);
726 return;
727 }
728 asc = c_d ? INVALID_FIELD_IN_CDB : INVALID_FIELD_IN_PARAM_LIST;
729 memset(sbuff, 0, SCSI_SENSE_BUFFERSIZE);
730 scsi_build_sense_buffer(sdebug_dsense, sbuff, ILLEGAL_REQUEST, asc, 0);
731 memset(sks, 0, sizeof(sks));
732 sks[0] = 0x80;
733 if (c_d)
734 sks[0] |= 0x40;
735 if (in_bit >= 0) {
736 sks[0] |= 0x8;
737 sks[0] |= 0x7 & in_bit;
738 }
739 put_unaligned_be16(in_byte, sks + 1);
740 if (sdebug_dsense) {
741 sl = sbuff[7] + 8;
742 sbuff[7] = sl;
743 sbuff[sl] = 0x2;
744 sbuff[sl + 1] = 0x6;
745 memcpy(sbuff + sl + 4, sks, 3);
746 } else
747 memcpy(sbuff + 15, sks, 3);
748 if (sdebug_verbose)
749 sdev_printk(KERN_INFO, scp->device, "%s: [sense_key,asc,ascq"
750 "]: [0x5,0x%x,0x0] %c byte=%d, bit=%d\n",
751 my_name, asc, c_d ? 'C' : 'D', in_byte, in_bit);
752 }
753
754 static void mk_sense_buffer(struct scsi_cmnd *scp, int key, int asc, int asq)
755 {
756 unsigned char *sbuff;
757
758 sbuff = scp->sense_buffer;
759 if (!sbuff) {
760 sdev_printk(KERN_ERR, scp->device,
761 "%s: sense_buffer is NULL\n", __func__);
762 return;
763 }
764 memset(sbuff, 0, SCSI_SENSE_BUFFERSIZE);
765
766 scsi_build_sense_buffer(sdebug_dsense, sbuff, key, asc, asq);
767
768 if (sdebug_verbose)
769 sdev_printk(KERN_INFO, scp->device,
770 "%s: [sense_key,asc,ascq]: [0x%x,0x%x,0x%x]\n",
771 my_name, key, asc, asq);
772 }
773
774 static void mk_sense_invalid_opcode(struct scsi_cmnd *scp)
775 {
776 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_OPCODE, 0);
777 }
778
779 static int scsi_debug_ioctl(struct scsi_device *dev, int cmd, void __user *arg)
780 {
781 if (sdebug_verbose) {
782 if (0x1261 == cmd)
783 sdev_printk(KERN_INFO, dev,
784 "%s: BLKFLSBUF [0x1261]\n", __func__);
785 else if (0x5331 == cmd)
786 sdev_printk(KERN_INFO, dev,
787 "%s: CDROM_GET_CAPABILITY [0x5331]\n",
788 __func__);
789 else
790 sdev_printk(KERN_INFO, dev, "%s: cmd=0x%x\n",
791 __func__, cmd);
792 }
793 return -EINVAL;
794 /* return -ENOTTY; // correct return but upsets fdisk */
795 }
796
797 static void clear_luns_changed_on_target(struct sdebug_dev_info *devip)
798 {
799 struct sdebug_host_info *sdhp;
800 struct sdebug_dev_info *dp;
801
802 spin_lock(&sdebug_host_list_lock);
803 list_for_each_entry(sdhp, &sdebug_host_list, host_list) {
804 list_for_each_entry(dp, &sdhp->dev_info_list, dev_list) {
805 if ((devip->sdbg_host == dp->sdbg_host) &&
806 (devip->target == dp->target))
807 clear_bit(SDEBUG_UA_LUNS_CHANGED, dp->uas_bm);
808 }
809 }
810 spin_unlock(&sdebug_host_list_lock);
811 }
812
813 static int make_ua(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
814 {
815 int k;
816
817 k = find_first_bit(devip->uas_bm, SDEBUG_NUM_UAS);
818 if (k != SDEBUG_NUM_UAS) {
819 const char *cp = NULL;
820
821 switch (k) {
822 case SDEBUG_UA_POR:
823 mk_sense_buffer(scp, UNIT_ATTENTION, UA_RESET_ASC,
824 POWER_ON_RESET_ASCQ);
825 if (sdebug_verbose)
826 cp = "power on reset";
827 break;
828 case SDEBUG_UA_BUS_RESET:
829 mk_sense_buffer(scp, UNIT_ATTENTION, UA_RESET_ASC,
830 BUS_RESET_ASCQ);
831 if (sdebug_verbose)
832 cp = "bus reset";
833 break;
834 case SDEBUG_UA_MODE_CHANGED:
835 mk_sense_buffer(scp, UNIT_ATTENTION, UA_CHANGED_ASC,
836 MODE_CHANGED_ASCQ);
837 if (sdebug_verbose)
838 cp = "mode parameters changed";
839 break;
840 case SDEBUG_UA_CAPACITY_CHANGED:
841 mk_sense_buffer(scp, UNIT_ATTENTION, UA_CHANGED_ASC,
842 CAPACITY_CHANGED_ASCQ);
843 if (sdebug_verbose)
844 cp = "capacity data changed";
845 break;
846 case SDEBUG_UA_MICROCODE_CHANGED:
847 mk_sense_buffer(scp, UNIT_ATTENTION,
848 TARGET_CHANGED_ASC,
849 MICROCODE_CHANGED_ASCQ);
850 if (sdebug_verbose)
851 cp = "microcode has been changed";
852 break;
853 case SDEBUG_UA_MICROCODE_CHANGED_WO_RESET:
854 mk_sense_buffer(scp, UNIT_ATTENTION,
855 TARGET_CHANGED_ASC,
856 MICROCODE_CHANGED_WO_RESET_ASCQ);
857 if (sdebug_verbose)
858 cp = "microcode has been changed without reset";
859 break;
860 case SDEBUG_UA_LUNS_CHANGED:
861 /*
862 * SPC-3 behavior is to report a UNIT ATTENTION with
863 * ASC/ASCQ REPORTED LUNS DATA HAS CHANGED on every LUN
864 * on the target, until a REPORT LUNS command is
865 * received. SPC-4 behavior is to report it only once.
866 * NOTE: sdebug_scsi_level does not use the same
867 * values as struct scsi_device->scsi_level.
868 */
869 if (sdebug_scsi_level >= 6) /* SPC-4 and above */
870 clear_luns_changed_on_target(devip);
871 mk_sense_buffer(scp, UNIT_ATTENTION,
872 TARGET_CHANGED_ASC,
873 LUNS_CHANGED_ASCQ);
874 if (sdebug_verbose)
875 cp = "reported luns data has changed";
876 break;
877 default:
878 pr_warn("unexpected unit attention code=%d\n", k);
879 if (sdebug_verbose)
880 cp = "unknown";
881 break;
882 }
883 clear_bit(k, devip->uas_bm);
884 if (sdebug_verbose)
885 sdev_printk(KERN_INFO, scp->device,
886 "%s reports: Unit attention: %s\n",
887 my_name, cp);
888 return check_condition_result;
889 }
890 return 0;
891 }
892
893 /* Build SCSI "data-in" buffer. Returns 0 if ok else (DID_ERROR << 16). */
894 static int fill_from_dev_buffer(struct scsi_cmnd *scp, unsigned char *arr,
895 int arr_len)
896 {
897 int act_len;
898 struct scsi_data_buffer *sdb = scsi_in(scp);
899
900 if (!sdb->length)
901 return 0;
902 if (!(scsi_bidi_cmnd(scp) || scp->sc_data_direction == DMA_FROM_DEVICE))
903 return DID_ERROR << 16;
904
905 act_len = sg_copy_from_buffer(sdb->table.sgl, sdb->table.nents,
906 arr, arr_len);
907 sdb->resid = scsi_bufflen(scp) - act_len;
908
909 return 0;
910 }
911
912 /* Partial build of SCSI "data-in" buffer. Returns 0 if ok else
913 * (DID_ERROR << 16). Can write to offset in data-in buffer. If multiple
914 * calls, not required to write in ascending offset order. Assumes resid
915 * set to scsi_bufflen() prior to any calls.
916 */
917 static int p_fill_from_dev_buffer(struct scsi_cmnd *scp, const void *arr,
918 int arr_len, unsigned int off_dst)
919 {
920 int act_len, n;
921 struct scsi_data_buffer *sdb = scsi_in(scp);
922 off_t skip = off_dst;
923
924 if (sdb->length <= off_dst)
925 return 0;
926 if (!(scsi_bidi_cmnd(scp) || scp->sc_data_direction == DMA_FROM_DEVICE))
927 return DID_ERROR << 16;
928
929 act_len = sg_pcopy_from_buffer(sdb->table.sgl, sdb->table.nents,
930 arr, arr_len, skip);
931 pr_debug("%s: off_dst=%u, scsi_bufflen=%u, act_len=%u, resid=%d\n",
932 __func__, off_dst, scsi_bufflen(scp), act_len, sdb->resid);
933 n = (int)scsi_bufflen(scp) - ((int)off_dst + act_len);
934 sdb->resid = min(sdb->resid, n);
935 return 0;
936 }
937
938 /* Fetches from SCSI "data-out" buffer. Returns number of bytes fetched into
939 * 'arr' or -1 if error.
940 */
941 static int fetch_to_dev_buffer(struct scsi_cmnd *scp, unsigned char *arr,
942 int arr_len)
943 {
944 if (!scsi_bufflen(scp))
945 return 0;
946 if (!(scsi_bidi_cmnd(scp) || scp->sc_data_direction == DMA_TO_DEVICE))
947 return -1;
948
949 return scsi_sg_copy_to_buffer(scp, arr, arr_len);
950 }
951
952
953 static const char * inq_vendor_id = "Linux ";
954 static const char * inq_product_id = "scsi_debug ";
955 static const char *inq_product_rev = "0186"; /* version less '.' */
956 /* Use some locally assigned NAAs for SAS addresses. */
957 static const u64 naa3_comp_a = 0x3222222000000000ULL;
958 static const u64 naa3_comp_b = 0x3333333000000000ULL;
959 static const u64 naa3_comp_c = 0x3111111000000000ULL;
960
961 /* Device identification VPD page. Returns number of bytes placed in arr */
962 static int inquiry_vpd_83(unsigned char *arr, int port_group_id,
963 int target_dev_id, int dev_id_num,
964 const char *dev_id_str, int dev_id_str_len,
965 const uuid_be *lu_name)
966 {
967 int num, port_a;
968 char b[32];
969
970 port_a = target_dev_id + 1;
971 /* T10 vendor identifier field format (faked) */
972 arr[0] = 0x2; /* ASCII */
973 arr[1] = 0x1;
974 arr[2] = 0x0;
975 memcpy(&arr[4], inq_vendor_id, 8);
976 memcpy(&arr[12], inq_product_id, 16);
977 memcpy(&arr[28], dev_id_str, dev_id_str_len);
978 num = 8 + 16 + dev_id_str_len;
979 arr[3] = num;
980 num += 4;
981 if (dev_id_num >= 0) {
982 if (sdebug_uuid_ctl) {
983 /* Locally assigned UUID */
984 arr[num++] = 0x1; /* binary (not necessarily sas) */
985 arr[num++] = 0xa; /* PIV=0, lu, naa */
986 arr[num++] = 0x0;
987 arr[num++] = 0x12;
988 arr[num++] = 0x10; /* uuid type=1, locally assigned */
989 arr[num++] = 0x0;
990 memcpy(arr + num, lu_name, 16);
991 num += 16;
992 } else {
993 /* NAA-3, Logical unit identifier (binary) */
994 arr[num++] = 0x1; /* binary (not necessarily sas) */
995 arr[num++] = 0x3; /* PIV=0, lu, naa */
996 arr[num++] = 0x0;
997 arr[num++] = 0x8;
998 put_unaligned_be64(naa3_comp_b + dev_id_num, arr + num);
999 num += 8;
1000 }
1001 /* Target relative port number */
1002 arr[num++] = 0x61; /* proto=sas, binary */
1003 arr[num++] = 0x94; /* PIV=1, target port, rel port */
1004 arr[num++] = 0x0; /* reserved */
1005 arr[num++] = 0x4; /* length */
1006 arr[num++] = 0x0; /* reserved */
1007 arr[num++] = 0x0; /* reserved */
1008 arr[num++] = 0x0;
1009 arr[num++] = 0x1; /* relative port A */
1010 }
1011 /* NAA-3, Target port identifier */
1012 arr[num++] = 0x61; /* proto=sas, binary */
1013 arr[num++] = 0x93; /* piv=1, target port, naa */
1014 arr[num++] = 0x0;
1015 arr[num++] = 0x8;
1016 put_unaligned_be64(naa3_comp_a + port_a, arr + num);
1017 num += 8;
1018 /* NAA-3, Target port group identifier */
1019 arr[num++] = 0x61; /* proto=sas, binary */
1020 arr[num++] = 0x95; /* piv=1, target port group id */
1021 arr[num++] = 0x0;
1022 arr[num++] = 0x4;
1023 arr[num++] = 0;
1024 arr[num++] = 0;
1025 put_unaligned_be16(port_group_id, arr + num);
1026 num += 2;
1027 /* NAA-3, Target device identifier */
1028 arr[num++] = 0x61; /* proto=sas, binary */
1029 arr[num++] = 0xa3; /* piv=1, target device, naa */
1030 arr[num++] = 0x0;
1031 arr[num++] = 0x8;
1032 put_unaligned_be64(naa3_comp_a + target_dev_id, arr + num);
1033 num += 8;
1034 /* SCSI name string: Target device identifier */
1035 arr[num++] = 0x63; /* proto=sas, UTF-8 */
1036 arr[num++] = 0xa8; /* piv=1, target device, SCSI name string */
1037 arr[num++] = 0x0;
1038 arr[num++] = 24;
1039 memcpy(arr + num, "naa.32222220", 12);
1040 num += 12;
1041 snprintf(b, sizeof(b), "%08X", target_dev_id);
1042 memcpy(arr + num, b, 8);
1043 num += 8;
1044 memset(arr + num, 0, 4);
1045 num += 4;
1046 return num;
1047 }
1048
1049 static unsigned char vpd84_data[] = {
1050 /* from 4th byte */ 0x22,0x22,0x22,0x0,0xbb,0x0,
1051 0x22,0x22,0x22,0x0,0xbb,0x1,
1052 0x22,0x22,0x22,0x0,0xbb,0x2,
1053 };
1054
1055 /* Software interface identification VPD page */
1056 static int inquiry_vpd_84(unsigned char *arr)
1057 {
1058 memcpy(arr, vpd84_data, sizeof(vpd84_data));
1059 return sizeof(vpd84_data);
1060 }
1061
1062 /* Management network addresses VPD page */
1063 static int inquiry_vpd_85(unsigned char *arr)
1064 {
1065 int num = 0;
1066 const char * na1 = "https://www.kernel.org/config";
1067 const char * na2 = "http://www.kernel.org/log";
1068 int plen, olen;
1069
1070 arr[num++] = 0x1; /* lu, storage config */
1071 arr[num++] = 0x0; /* reserved */
1072 arr[num++] = 0x0;
1073 olen = strlen(na1);
1074 plen = olen + 1;
1075 if (plen % 4)
1076 plen = ((plen / 4) + 1) * 4;
1077 arr[num++] = plen; /* length, null termianted, padded */
1078 memcpy(arr + num, na1, olen);
1079 memset(arr + num + olen, 0, plen - olen);
1080 num += plen;
1081
1082 arr[num++] = 0x4; /* lu, logging */
1083 arr[num++] = 0x0; /* reserved */
1084 arr[num++] = 0x0;
1085 olen = strlen(na2);
1086 plen = olen + 1;
1087 if (plen % 4)
1088 plen = ((plen / 4) + 1) * 4;
1089 arr[num++] = plen; /* length, null terminated, padded */
1090 memcpy(arr + num, na2, olen);
1091 memset(arr + num + olen, 0, plen - olen);
1092 num += plen;
1093
1094 return num;
1095 }
1096
1097 /* SCSI ports VPD page */
1098 static int inquiry_vpd_88(unsigned char *arr, int target_dev_id)
1099 {
1100 int num = 0;
1101 int port_a, port_b;
1102
1103 port_a = target_dev_id + 1;
1104 port_b = port_a + 1;
1105 arr[num++] = 0x0; /* reserved */
1106 arr[num++] = 0x0; /* reserved */
1107 arr[num++] = 0x0;
1108 arr[num++] = 0x1; /* relative port 1 (primary) */
1109 memset(arr + num, 0, 6);
1110 num += 6;
1111 arr[num++] = 0x0;
1112 arr[num++] = 12; /* length tp descriptor */
1113 /* naa-5 target port identifier (A) */
1114 arr[num++] = 0x61; /* proto=sas, binary */
1115 arr[num++] = 0x93; /* PIV=1, target port, NAA */
1116 arr[num++] = 0x0; /* reserved */
1117 arr[num++] = 0x8; /* length */
1118 put_unaligned_be64(naa3_comp_a + port_a, arr + num);
1119 num += 8;
1120 arr[num++] = 0x0; /* reserved */
1121 arr[num++] = 0x0; /* reserved */
1122 arr[num++] = 0x0;
1123 arr[num++] = 0x2; /* relative port 2 (secondary) */
1124 memset(arr + num, 0, 6);
1125 num += 6;
1126 arr[num++] = 0x0;
1127 arr[num++] = 12; /* length tp descriptor */
1128 /* naa-5 target port identifier (B) */
1129 arr[num++] = 0x61; /* proto=sas, binary */
1130 arr[num++] = 0x93; /* PIV=1, target port, NAA */
1131 arr[num++] = 0x0; /* reserved */
1132 arr[num++] = 0x8; /* length */
1133 put_unaligned_be64(naa3_comp_a + port_b, arr + num);
1134 num += 8;
1135
1136 return num;
1137 }
1138
1139
1140 static unsigned char vpd89_data[] = {
1141 /* from 4th byte */ 0,0,0,0,
1142 'l','i','n','u','x',' ',' ',' ',
1143 'S','A','T',' ','s','c','s','i','_','d','e','b','u','g',' ',' ',
1144 '1','2','3','4',
1145 0x34,0,0,0,1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,
1146 0xec,0,0,0,
1147 0x5a,0xc,0xff,0x3f,0x37,0xc8,0x10,0,0,0,0,0,0x3f,0,0,0,
1148 0,0,0,0,0x58,0x58,0x58,0x58,0x58,0x58,0x58,0x58,0x20,0x20,0x20,0x20,
1149 0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0,0,0,0x40,0x4,0,0x2e,0x33,
1150 0x38,0x31,0x20,0x20,0x20,0x20,0x54,0x53,0x38,0x33,0x30,0x30,0x33,0x31,
1151 0x53,0x41,
1152 0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,
1153 0x20,0x20,
1154 0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,
1155 0x10,0x80,
1156 0,0,0,0x2f,0,0,0,0x2,0,0x2,0x7,0,0xff,0xff,0x1,0,
1157 0x3f,0,0xc1,0xff,0x3e,0,0x10,0x1,0xb0,0xf8,0x50,0x9,0,0,0x7,0,
1158 0x3,0,0x78,0,0x78,0,0xf0,0,0x78,0,0,0,0,0,0,0,
1159 0,0,0,0,0,0,0,0,0x2,0,0,0,0,0,0,0,
1160 0x7e,0,0x1b,0,0x6b,0x34,0x1,0x7d,0x3,0x40,0x69,0x34,0x1,0x3c,0x3,0x40,
1161 0x7f,0x40,0,0,0,0,0xfe,0xfe,0,0,0,0,0,0xfe,0,0,
1162 0,0,0,0,0,0,0,0,0xb0,0xf8,0x50,0x9,0,0,0,0,
1163 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1164 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1165 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1166 0x1,0,0xb0,0xf8,0x50,0x9,0xb0,0xf8,0x50,0x9,0x20,0x20,0x2,0,0xb6,0x42,
1167 0,0x80,0x8a,0,0x6,0x3c,0xa,0x3c,0xff,0xff,0xc6,0x7,0,0x1,0,0x8,
1168 0xf0,0xf,0,0x10,0x2,0,0x30,0,0,0,0,0,0,0,0x6,0xfe,
1169 0,0,0x2,0,0x50,0,0x8a,0,0x4f,0x95,0,0,0x21,0,0xb,0,
1170 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1171 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1172 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1173 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1174 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1175 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1176 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1177 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1178 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1179 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1180 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1181 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0xa5,0x51,
1182 };
1183
1184 /* ATA Information VPD page */
1185 static int inquiry_vpd_89(unsigned char *arr)
1186 {
1187 memcpy(arr, vpd89_data, sizeof(vpd89_data));
1188 return sizeof(vpd89_data);
1189 }
1190
1191
1192 static unsigned char vpdb0_data[] = {
1193 /* from 4th byte */ 0,0,0,4, 0,0,0x4,0, 0,0,0,64,
1194 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1195 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1196 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1197 };
1198
1199 /* Block limits VPD page (SBC-3) */
1200 static int inquiry_vpd_b0(unsigned char *arr)
1201 {
1202 unsigned int gran;
1203
1204 memcpy(arr, vpdb0_data, sizeof(vpdb0_data));
1205
1206 /* Optimal transfer length granularity */
1207 gran = 1 << sdebug_physblk_exp;
1208 put_unaligned_be16(gran, arr + 2);
1209
1210 /* Maximum Transfer Length */
1211 if (sdebug_store_sectors > 0x400)
1212 put_unaligned_be32(sdebug_store_sectors, arr + 4);
1213
1214 /* Optimal Transfer Length */
1215 put_unaligned_be32(sdebug_opt_blks, &arr[8]);
1216
1217 if (sdebug_lbpu) {
1218 /* Maximum Unmap LBA Count */
1219 put_unaligned_be32(sdebug_unmap_max_blocks, &arr[16]);
1220
1221 /* Maximum Unmap Block Descriptor Count */
1222 put_unaligned_be32(sdebug_unmap_max_desc, &arr[20]);
1223 }
1224
1225 /* Unmap Granularity Alignment */
1226 if (sdebug_unmap_alignment) {
1227 put_unaligned_be32(sdebug_unmap_alignment, &arr[28]);
1228 arr[28] |= 0x80; /* UGAVALID */
1229 }
1230
1231 /* Optimal Unmap Granularity */
1232 put_unaligned_be32(sdebug_unmap_granularity, &arr[24]);
1233
1234 /* Maximum WRITE SAME Length */
1235 put_unaligned_be64(sdebug_write_same_length, &arr[32]);
1236
1237 return 0x3c; /* Mandatory page length for Logical Block Provisioning */
1238
1239 return sizeof(vpdb0_data);
1240 }
1241
1242 /* Block device characteristics VPD page (SBC-3) */
1243 static int inquiry_vpd_b1(unsigned char *arr)
1244 {
1245 memset(arr, 0, 0x3c);
1246 arr[0] = 0;
1247 arr[1] = 1; /* non rotating medium (e.g. solid state) */
1248 arr[2] = 0;
1249 arr[3] = 5; /* less than 1.8" */
1250
1251 return 0x3c;
1252 }
1253
1254 /* Logical block provisioning VPD page (SBC-4) */
1255 static int inquiry_vpd_b2(unsigned char *arr)
1256 {
1257 memset(arr, 0, 0x4);
1258 arr[0] = 0; /* threshold exponent */
1259 if (sdebug_lbpu)
1260 arr[1] = 1 << 7;
1261 if (sdebug_lbpws)
1262 arr[1] |= 1 << 6;
1263 if (sdebug_lbpws10)
1264 arr[1] |= 1 << 5;
1265 if (sdebug_lbprz && scsi_debug_lbp())
1266 arr[1] |= (sdebug_lbprz & 0x7) << 2; /* sbc4r07 and later */
1267 /* anc_sup=0; dp=0 (no provisioning group descriptor) */
1268 /* minimum_percentage=0; provisioning_type=0 (unknown) */
1269 /* threshold_percentage=0 */
1270 return 0x4;
1271 }
1272
1273 #define SDEBUG_LONG_INQ_SZ 96
1274 #define SDEBUG_MAX_INQ_ARR_SZ 584
1275
1276 static int resp_inquiry(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
1277 {
1278 unsigned char pq_pdt;
1279 unsigned char * arr;
1280 unsigned char *cmd = scp->cmnd;
1281 int alloc_len, n, ret;
1282 bool have_wlun, is_disk;
1283
1284 alloc_len = get_unaligned_be16(cmd + 3);
1285 arr = kzalloc(SDEBUG_MAX_INQ_ARR_SZ, GFP_ATOMIC);
1286 if (! arr)
1287 return DID_REQUEUE << 16;
1288 is_disk = (sdebug_ptype == TYPE_DISK);
1289 have_wlun = scsi_is_wlun(scp->device->lun);
1290 if (have_wlun)
1291 pq_pdt = TYPE_WLUN; /* present, wlun */
1292 else if (sdebug_no_lun_0 && (devip->lun == SDEBUG_LUN_0_VAL))
1293 pq_pdt = 0x7f; /* not present, PQ=3, PDT=0x1f */
1294 else
1295 pq_pdt = (sdebug_ptype & 0x1f);
1296 arr[0] = pq_pdt;
1297 if (0x2 & cmd[1]) { /* CMDDT bit set */
1298 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 1);
1299 kfree(arr);
1300 return check_condition_result;
1301 } else if (0x1 & cmd[1]) { /* EVPD bit set */
1302 int lu_id_num, port_group_id, target_dev_id, len;
1303 char lu_id_str[6];
1304 int host_no = devip->sdbg_host->shost->host_no;
1305
1306 port_group_id = (((host_no + 1) & 0x7f) << 8) +
1307 (devip->channel & 0x7f);
1308 if (sdebug_vpd_use_hostno == 0)
1309 host_no = 0;
1310 lu_id_num = have_wlun ? -1 : (((host_no + 1) * 2000) +
1311 (devip->target * 1000) + devip->lun);
1312 target_dev_id = ((host_no + 1) * 2000) +
1313 (devip->target * 1000) - 3;
1314 len = scnprintf(lu_id_str, 6, "%d", lu_id_num);
1315 if (0 == cmd[2]) { /* supported vital product data pages */
1316 arr[1] = cmd[2]; /*sanity */
1317 n = 4;
1318 arr[n++] = 0x0; /* this page */
1319 arr[n++] = 0x80; /* unit serial number */
1320 arr[n++] = 0x83; /* device identification */
1321 arr[n++] = 0x84; /* software interface ident. */
1322 arr[n++] = 0x85; /* management network addresses */
1323 arr[n++] = 0x86; /* extended inquiry */
1324 arr[n++] = 0x87; /* mode page policy */
1325 arr[n++] = 0x88; /* SCSI ports */
1326 if (is_disk) { /* SBC only */
1327 arr[n++] = 0x89; /* ATA information */
1328 arr[n++] = 0xb0; /* Block limits */
1329 arr[n++] = 0xb1; /* Block characteristics */
1330 arr[n++] = 0xb2; /* Logical Block Prov */
1331 }
1332 arr[3] = n - 4; /* number of supported VPD pages */
1333 } else if (0x80 == cmd[2]) { /* unit serial number */
1334 arr[1] = cmd[2]; /*sanity */
1335 arr[3] = len;
1336 memcpy(&arr[4], lu_id_str, len);
1337 } else if (0x83 == cmd[2]) { /* device identification */
1338 arr[1] = cmd[2]; /*sanity */
1339 arr[3] = inquiry_vpd_83(&arr[4], port_group_id,
1340 target_dev_id, lu_id_num,
1341 lu_id_str, len,
1342 &devip->lu_name);
1343 } else if (0x84 == cmd[2]) { /* Software interface ident. */
1344 arr[1] = cmd[2]; /*sanity */
1345 arr[3] = inquiry_vpd_84(&arr[4]);
1346 } else if (0x85 == cmd[2]) { /* Management network addresses */
1347 arr[1] = cmd[2]; /*sanity */
1348 arr[3] = inquiry_vpd_85(&arr[4]);
1349 } else if (0x86 == cmd[2]) { /* extended inquiry */
1350 arr[1] = cmd[2]; /*sanity */
1351 arr[3] = 0x3c; /* number of following entries */
1352 if (sdebug_dif == SD_DIF_TYPE3_PROTECTION)
1353 arr[4] = 0x4; /* SPT: GRD_CHK:1 */
1354 else if (have_dif_prot)
1355 arr[4] = 0x5; /* SPT: GRD_CHK:1, REF_CHK:1 */
1356 else
1357 arr[4] = 0x0; /* no protection stuff */
1358 arr[5] = 0x7; /* head of q, ordered + simple q's */
1359 } else if (0x87 == cmd[2]) { /* mode page policy */
1360 arr[1] = cmd[2]; /*sanity */
1361 arr[3] = 0x8; /* number of following entries */
1362 arr[4] = 0x2; /* disconnect-reconnect mp */
1363 arr[6] = 0x80; /* mlus, shared */
1364 arr[8] = 0x18; /* protocol specific lu */
1365 arr[10] = 0x82; /* mlus, per initiator port */
1366 } else if (0x88 == cmd[2]) { /* SCSI Ports */
1367 arr[1] = cmd[2]; /*sanity */
1368 arr[3] = inquiry_vpd_88(&arr[4], target_dev_id);
1369 } else if (is_disk && 0x89 == cmd[2]) { /* ATA information */
1370 arr[1] = cmd[2]; /*sanity */
1371 n = inquiry_vpd_89(&arr[4]);
1372 put_unaligned_be16(n, arr + 2);
1373 } else if (is_disk && 0xb0 == cmd[2]) { /* Block limits */
1374 arr[1] = cmd[2]; /*sanity */
1375 arr[3] = inquiry_vpd_b0(&arr[4]);
1376 } else if (is_disk && 0xb1 == cmd[2]) { /* Block char. */
1377 arr[1] = cmd[2]; /*sanity */
1378 arr[3] = inquiry_vpd_b1(&arr[4]);
1379 } else if (is_disk && 0xb2 == cmd[2]) { /* LB Prov. */
1380 arr[1] = cmd[2]; /*sanity */
1381 arr[3] = inquiry_vpd_b2(&arr[4]);
1382 } else {
1383 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, -1);
1384 kfree(arr);
1385 return check_condition_result;
1386 }
1387 len = min(get_unaligned_be16(arr + 2) + 4, alloc_len);
1388 ret = fill_from_dev_buffer(scp, arr,
1389 min(len, SDEBUG_MAX_INQ_ARR_SZ));
1390 kfree(arr);
1391 return ret;
1392 }
1393 /* drops through here for a standard inquiry */
1394 arr[1] = sdebug_removable ? 0x80 : 0; /* Removable disk */
1395 arr[2] = sdebug_scsi_level;
1396 arr[3] = 2; /* response_data_format==2 */
1397 arr[4] = SDEBUG_LONG_INQ_SZ - 5;
1398 arr[5] = (int)have_dif_prot; /* PROTECT bit */
1399 if (sdebug_vpd_use_hostno == 0)
1400 arr[5] = 0x10; /* claim: implicit TGPS */
1401 arr[6] = 0x10; /* claim: MultiP */
1402 /* arr[6] |= 0x40; ... claim: EncServ (enclosure services) */
1403 arr[7] = 0xa; /* claim: LINKED + CMDQUE */
1404 memcpy(&arr[8], inq_vendor_id, 8);
1405 memcpy(&arr[16], inq_product_id, 16);
1406 memcpy(&arr[32], inq_product_rev, 4);
1407 /* version descriptors (2 bytes each) follow */
1408 put_unaligned_be16(0xc0, arr + 58); /* SAM-6 no version claimed */
1409 put_unaligned_be16(0x5c0, arr + 60); /* SPC-5 no version claimed */
1410 n = 62;
1411 if (is_disk) { /* SBC-4 no version claimed */
1412 put_unaligned_be16(0x600, arr + n);
1413 n += 2;
1414 } else if (sdebug_ptype == TYPE_TAPE) { /* SSC-4 rev 3 */
1415 put_unaligned_be16(0x525, arr + n);
1416 n += 2;
1417 }
1418 put_unaligned_be16(0x2100, arr + n); /* SPL-4 no version claimed */
1419 ret = fill_from_dev_buffer(scp, arr,
1420 min(alloc_len, SDEBUG_LONG_INQ_SZ));
1421 kfree(arr);
1422 return ret;
1423 }
1424
1425 static unsigned char iec_m_pg[] = {0x1c, 0xa, 0x08, 0, 0, 0, 0, 0,
1426 0, 0, 0x0, 0x0};
1427
1428 static int resp_requests(struct scsi_cmnd * scp,
1429 struct sdebug_dev_info * devip)
1430 {
1431 unsigned char * sbuff;
1432 unsigned char *cmd = scp->cmnd;
1433 unsigned char arr[SCSI_SENSE_BUFFERSIZE];
1434 bool dsense;
1435 int len = 18;
1436
1437 memset(arr, 0, sizeof(arr));
1438 dsense = !!(cmd[1] & 1);
1439 sbuff = scp->sense_buffer;
1440 if ((iec_m_pg[2] & 0x4) && (6 == (iec_m_pg[3] & 0xf))) {
1441 if (dsense) {
1442 arr[0] = 0x72;
1443 arr[1] = 0x0; /* NO_SENSE in sense_key */
1444 arr[2] = THRESHOLD_EXCEEDED;
1445 arr[3] = 0xff; /* TEST set and MRIE==6 */
1446 len = 8;
1447 } else {
1448 arr[0] = 0x70;
1449 arr[2] = 0x0; /* NO_SENSE in sense_key */
1450 arr[7] = 0xa; /* 18 byte sense buffer */
1451 arr[12] = THRESHOLD_EXCEEDED;
1452 arr[13] = 0xff; /* TEST set and MRIE==6 */
1453 }
1454 } else {
1455 memcpy(arr, sbuff, SCSI_SENSE_BUFFERSIZE);
1456 if (arr[0] >= 0x70 && dsense == sdebug_dsense)
1457 ; /* have sense and formats match */
1458 else if (arr[0] <= 0x70) {
1459 if (dsense) {
1460 memset(arr, 0, 8);
1461 arr[0] = 0x72;
1462 len = 8;
1463 } else {
1464 memset(arr, 0, 18);
1465 arr[0] = 0x70;
1466 arr[7] = 0xa;
1467 }
1468 } else if (dsense) {
1469 memset(arr, 0, 8);
1470 arr[0] = 0x72;
1471 arr[1] = sbuff[2]; /* sense key */
1472 arr[2] = sbuff[12]; /* asc */
1473 arr[3] = sbuff[13]; /* ascq */
1474 len = 8;
1475 } else {
1476 memset(arr, 0, 18);
1477 arr[0] = 0x70;
1478 arr[2] = sbuff[1];
1479 arr[7] = 0xa;
1480 arr[12] = sbuff[1];
1481 arr[13] = sbuff[3];
1482 }
1483
1484 }
1485 mk_sense_buffer(scp, 0, NO_ADDITIONAL_SENSE, 0);
1486 return fill_from_dev_buffer(scp, arr, len);
1487 }
1488
1489 static int resp_start_stop(struct scsi_cmnd * scp,
1490 struct sdebug_dev_info * devip)
1491 {
1492 unsigned char *cmd = scp->cmnd;
1493 int power_cond, stop;
1494
1495 power_cond = (cmd[4] & 0xf0) >> 4;
1496 if (power_cond) {
1497 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 4, 7);
1498 return check_condition_result;
1499 }
1500 stop = !(cmd[4] & 1);
1501 atomic_xchg(&devip->stopped, stop);
1502 return 0;
1503 }
1504
1505 static sector_t get_sdebug_capacity(void)
1506 {
1507 static const unsigned int gibibyte = 1073741824;
1508
1509 if (sdebug_virtual_gb > 0)
1510 return (sector_t)sdebug_virtual_gb *
1511 (gibibyte / sdebug_sector_size);
1512 else
1513 return sdebug_store_sectors;
1514 }
1515
1516 #define SDEBUG_READCAP_ARR_SZ 8
1517 static int resp_readcap(struct scsi_cmnd * scp,
1518 struct sdebug_dev_info * devip)
1519 {
1520 unsigned char arr[SDEBUG_READCAP_ARR_SZ];
1521 unsigned int capac;
1522
1523 /* following just in case virtual_gb changed */
1524 sdebug_capacity = get_sdebug_capacity();
1525 memset(arr, 0, SDEBUG_READCAP_ARR_SZ);
1526 if (sdebug_capacity < 0xffffffff) {
1527 capac = (unsigned int)sdebug_capacity - 1;
1528 put_unaligned_be32(capac, arr + 0);
1529 } else
1530 put_unaligned_be32(0xffffffff, arr + 0);
1531 put_unaligned_be16(sdebug_sector_size, arr + 6);
1532 return fill_from_dev_buffer(scp, arr, SDEBUG_READCAP_ARR_SZ);
1533 }
1534
1535 #define SDEBUG_READCAP16_ARR_SZ 32
1536 static int resp_readcap16(struct scsi_cmnd * scp,
1537 struct sdebug_dev_info * devip)
1538 {
1539 unsigned char *cmd = scp->cmnd;
1540 unsigned char arr[SDEBUG_READCAP16_ARR_SZ];
1541 int alloc_len;
1542
1543 alloc_len = get_unaligned_be32(cmd + 10);
1544 /* following just in case virtual_gb changed */
1545 sdebug_capacity = get_sdebug_capacity();
1546 memset(arr, 0, SDEBUG_READCAP16_ARR_SZ);
1547 put_unaligned_be64((u64)(sdebug_capacity - 1), arr + 0);
1548 put_unaligned_be32(sdebug_sector_size, arr + 8);
1549 arr[13] = sdebug_physblk_exp & 0xf;
1550 arr[14] = (sdebug_lowest_aligned >> 8) & 0x3f;
1551
1552 if (scsi_debug_lbp()) {
1553 arr[14] |= 0x80; /* LBPME */
1554 /* from sbc4r07, this LBPRZ field is 1 bit, but the LBPRZ in
1555 * the LB Provisioning VPD page is 3 bits. Note that lbprz=2
1556 * in the wider field maps to 0 in this field.
1557 */
1558 if (sdebug_lbprz & 1) /* precisely what the draft requires */
1559 arr[14] |= 0x40;
1560 }
1561
1562 arr[15] = sdebug_lowest_aligned & 0xff;
1563
1564 if (have_dif_prot) {
1565 arr[12] = (sdebug_dif - 1) << 1; /* P_TYPE */
1566 arr[12] |= 1; /* PROT_EN */
1567 }
1568
1569 return fill_from_dev_buffer(scp, arr,
1570 min(alloc_len, SDEBUG_READCAP16_ARR_SZ));
1571 }
1572
1573 #define SDEBUG_MAX_TGTPGS_ARR_SZ 1412
1574
1575 static int resp_report_tgtpgs(struct scsi_cmnd * scp,
1576 struct sdebug_dev_info * devip)
1577 {
1578 unsigned char *cmd = scp->cmnd;
1579 unsigned char * arr;
1580 int host_no = devip->sdbg_host->shost->host_no;
1581 int n, ret, alen, rlen;
1582 int port_group_a, port_group_b, port_a, port_b;
1583
1584 alen = get_unaligned_be32(cmd + 6);
1585 arr = kzalloc(SDEBUG_MAX_TGTPGS_ARR_SZ, GFP_ATOMIC);
1586 if (! arr)
1587 return DID_REQUEUE << 16;
1588 /*
1589 * EVPD page 0x88 states we have two ports, one
1590 * real and a fake port with no device connected.
1591 * So we create two port groups with one port each
1592 * and set the group with port B to unavailable.
1593 */
1594 port_a = 0x1; /* relative port A */
1595 port_b = 0x2; /* relative port B */
1596 port_group_a = (((host_no + 1) & 0x7f) << 8) +
1597 (devip->channel & 0x7f);
1598 port_group_b = (((host_no + 1) & 0x7f) << 8) +
1599 (devip->channel & 0x7f) + 0x80;
1600
1601 /*
1602 * The asymmetric access state is cycled according to the host_id.
1603 */
1604 n = 4;
1605 if (sdebug_vpd_use_hostno == 0) {
1606 arr[n++] = host_no % 3; /* Asymm access state */
1607 arr[n++] = 0x0F; /* claim: all states are supported */
1608 } else {
1609 arr[n++] = 0x0; /* Active/Optimized path */
1610 arr[n++] = 0x01; /* only support active/optimized paths */
1611 }
1612 put_unaligned_be16(port_group_a, arr + n);
1613 n += 2;
1614 arr[n++] = 0; /* Reserved */
1615 arr[n++] = 0; /* Status code */
1616 arr[n++] = 0; /* Vendor unique */
1617 arr[n++] = 0x1; /* One port per group */
1618 arr[n++] = 0; /* Reserved */
1619 arr[n++] = 0; /* Reserved */
1620 put_unaligned_be16(port_a, arr + n);
1621 n += 2;
1622 arr[n++] = 3; /* Port unavailable */
1623 arr[n++] = 0x08; /* claim: only unavailalbe paths are supported */
1624 put_unaligned_be16(port_group_b, arr + n);
1625 n += 2;
1626 arr[n++] = 0; /* Reserved */
1627 arr[n++] = 0; /* Status code */
1628 arr[n++] = 0; /* Vendor unique */
1629 arr[n++] = 0x1; /* One port per group */
1630 arr[n++] = 0; /* Reserved */
1631 arr[n++] = 0; /* Reserved */
1632 put_unaligned_be16(port_b, arr + n);
1633 n += 2;
1634
1635 rlen = n - 4;
1636 put_unaligned_be32(rlen, arr + 0);
1637
1638 /*
1639 * Return the smallest value of either
1640 * - The allocated length
1641 * - The constructed command length
1642 * - The maximum array size
1643 */
1644 rlen = min(alen,n);
1645 ret = fill_from_dev_buffer(scp, arr,
1646 min(rlen, SDEBUG_MAX_TGTPGS_ARR_SZ));
1647 kfree(arr);
1648 return ret;
1649 }
1650
1651 static int resp_rsup_opcodes(struct scsi_cmnd *scp,
1652 struct sdebug_dev_info *devip)
1653 {
1654 bool rctd;
1655 u8 reporting_opts, req_opcode, sdeb_i, supp;
1656 u16 req_sa, u;
1657 u32 alloc_len, a_len;
1658 int k, offset, len, errsts, count, bump, na;
1659 const struct opcode_info_t *oip;
1660 const struct opcode_info_t *r_oip;
1661 u8 *arr;
1662 u8 *cmd = scp->cmnd;
1663
1664 rctd = !!(cmd[2] & 0x80);
1665 reporting_opts = cmd[2] & 0x7;
1666 req_opcode = cmd[3];
1667 req_sa = get_unaligned_be16(cmd + 4);
1668 alloc_len = get_unaligned_be32(cmd + 6);
1669 if (alloc_len < 4 || alloc_len > 0xffff) {
1670 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 6, -1);
1671 return check_condition_result;
1672 }
1673 if (alloc_len > 8192)
1674 a_len = 8192;
1675 else
1676 a_len = alloc_len;
1677 arr = kzalloc((a_len < 256) ? 320 : a_len + 64, GFP_ATOMIC);
1678 if (NULL == arr) {
1679 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
1680 INSUFF_RES_ASCQ);
1681 return check_condition_result;
1682 }
1683 switch (reporting_opts) {
1684 case 0: /* all commands */
1685 /* count number of commands */
1686 for (count = 0, oip = opcode_info_arr;
1687 oip->num_attached != 0xff; ++oip) {
1688 if (F_INV_OP & oip->flags)
1689 continue;
1690 count += (oip->num_attached + 1);
1691 }
1692 bump = rctd ? 20 : 8;
1693 put_unaligned_be32(count * bump, arr);
1694 for (offset = 4, oip = opcode_info_arr;
1695 oip->num_attached != 0xff && offset < a_len; ++oip) {
1696 if (F_INV_OP & oip->flags)
1697 continue;
1698 na = oip->num_attached;
1699 arr[offset] = oip->opcode;
1700 put_unaligned_be16(oip->sa, arr + offset + 2);
1701 if (rctd)
1702 arr[offset + 5] |= 0x2;
1703 if (FF_SA & oip->flags)
1704 arr[offset + 5] |= 0x1;
1705 put_unaligned_be16(oip->len_mask[0], arr + offset + 6);
1706 if (rctd)
1707 put_unaligned_be16(0xa, arr + offset + 8);
1708 r_oip = oip;
1709 for (k = 0, oip = oip->arrp; k < na; ++k, ++oip) {
1710 if (F_INV_OP & oip->flags)
1711 continue;
1712 offset += bump;
1713 arr[offset] = oip->opcode;
1714 put_unaligned_be16(oip->sa, arr + offset + 2);
1715 if (rctd)
1716 arr[offset + 5] |= 0x2;
1717 if (FF_SA & oip->flags)
1718 arr[offset + 5] |= 0x1;
1719 put_unaligned_be16(oip->len_mask[0],
1720 arr + offset + 6);
1721 if (rctd)
1722 put_unaligned_be16(0xa,
1723 arr + offset + 8);
1724 }
1725 oip = r_oip;
1726 offset += bump;
1727 }
1728 break;
1729 case 1: /* one command: opcode only */
1730 case 2: /* one command: opcode plus service action */
1731 case 3: /* one command: if sa==0 then opcode only else opcode+sa */
1732 sdeb_i = opcode_ind_arr[req_opcode];
1733 oip = &opcode_info_arr[sdeb_i];
1734 if (F_INV_OP & oip->flags) {
1735 supp = 1;
1736 offset = 4;
1737 } else {
1738 if (1 == reporting_opts) {
1739 if (FF_SA & oip->flags) {
1740 mk_sense_invalid_fld(scp, SDEB_IN_CDB,
1741 2, 2);
1742 kfree(arr);
1743 return check_condition_result;
1744 }
1745 req_sa = 0;
1746 } else if (2 == reporting_opts &&
1747 0 == (FF_SA & oip->flags)) {
1748 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 4, -1);
1749 kfree(arr); /* point at requested sa */
1750 return check_condition_result;
1751 }
1752 if (0 == (FF_SA & oip->flags) &&
1753 req_opcode == oip->opcode)
1754 supp = 3;
1755 else if (0 == (FF_SA & oip->flags)) {
1756 na = oip->num_attached;
1757 for (k = 0, oip = oip->arrp; k < na;
1758 ++k, ++oip) {
1759 if (req_opcode == oip->opcode)
1760 break;
1761 }
1762 supp = (k >= na) ? 1 : 3;
1763 } else if (req_sa != oip->sa) {
1764 na = oip->num_attached;
1765 for (k = 0, oip = oip->arrp; k < na;
1766 ++k, ++oip) {
1767 if (req_sa == oip->sa)
1768 break;
1769 }
1770 supp = (k >= na) ? 1 : 3;
1771 } else
1772 supp = 3;
1773 if (3 == supp) {
1774 u = oip->len_mask[0];
1775 put_unaligned_be16(u, arr + 2);
1776 arr[4] = oip->opcode;
1777 for (k = 1; k < u; ++k)
1778 arr[4 + k] = (k < 16) ?
1779 oip->len_mask[k] : 0xff;
1780 offset = 4 + u;
1781 } else
1782 offset = 4;
1783 }
1784 arr[1] = (rctd ? 0x80 : 0) | supp;
1785 if (rctd) {
1786 put_unaligned_be16(0xa, arr + offset);
1787 offset += 12;
1788 }
1789 break;
1790 default:
1791 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 2);
1792 kfree(arr);
1793 return check_condition_result;
1794 }
1795 offset = (offset < a_len) ? offset : a_len;
1796 len = (offset < alloc_len) ? offset : alloc_len;
1797 errsts = fill_from_dev_buffer(scp, arr, len);
1798 kfree(arr);
1799 return errsts;
1800 }
1801
1802 static int resp_rsup_tmfs(struct scsi_cmnd *scp,
1803 struct sdebug_dev_info *devip)
1804 {
1805 bool repd;
1806 u32 alloc_len, len;
1807 u8 arr[16];
1808 u8 *cmd = scp->cmnd;
1809
1810 memset(arr, 0, sizeof(arr));
1811 repd = !!(cmd[2] & 0x80);
1812 alloc_len = get_unaligned_be32(cmd + 6);
1813 if (alloc_len < 4) {
1814 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 6, -1);
1815 return check_condition_result;
1816 }
1817 arr[0] = 0xc8; /* ATS | ATSS | LURS */
1818 arr[1] = 0x1; /* ITNRS */
1819 if (repd) {
1820 arr[3] = 0xc;
1821 len = 16;
1822 } else
1823 len = 4;
1824
1825 len = (len < alloc_len) ? len : alloc_len;
1826 return fill_from_dev_buffer(scp, arr, len);
1827 }
1828
1829 /* <<Following mode page info copied from ST318451LW>> */
1830
1831 static int resp_err_recov_pg(unsigned char * p, int pcontrol, int target)
1832 { /* Read-Write Error Recovery page for mode_sense */
1833 unsigned char err_recov_pg[] = {0x1, 0xa, 0xc0, 11, 240, 0, 0, 0,
1834 5, 0, 0xff, 0xff};
1835
1836 memcpy(p, err_recov_pg, sizeof(err_recov_pg));
1837 if (1 == pcontrol)
1838 memset(p + 2, 0, sizeof(err_recov_pg) - 2);
1839 return sizeof(err_recov_pg);
1840 }
1841
1842 static int resp_disconnect_pg(unsigned char * p, int pcontrol, int target)
1843 { /* Disconnect-Reconnect page for mode_sense */
1844 unsigned char disconnect_pg[] = {0x2, 0xe, 128, 128, 0, 10, 0, 0,
1845 0, 0, 0, 0, 0, 0, 0, 0};
1846
1847 memcpy(p, disconnect_pg, sizeof(disconnect_pg));
1848 if (1 == pcontrol)
1849 memset(p + 2, 0, sizeof(disconnect_pg) - 2);
1850 return sizeof(disconnect_pg);
1851 }
1852
1853 static int resp_format_pg(unsigned char * p, int pcontrol, int target)
1854 { /* Format device page for mode_sense */
1855 unsigned char format_pg[] = {0x3, 0x16, 0, 0, 0, 0, 0, 0,
1856 0, 0, 0, 0, 0, 0, 0, 0,
1857 0, 0, 0, 0, 0x40, 0, 0, 0};
1858
1859 memcpy(p, format_pg, sizeof(format_pg));
1860 put_unaligned_be16(sdebug_sectors_per, p + 10);
1861 put_unaligned_be16(sdebug_sector_size, p + 12);
1862 if (sdebug_removable)
1863 p[20] |= 0x20; /* should agree with INQUIRY */
1864 if (1 == pcontrol)
1865 memset(p + 2, 0, sizeof(format_pg) - 2);
1866 return sizeof(format_pg);
1867 }
1868
1869 static unsigned char caching_pg[] = {0x8, 18, 0x14, 0, 0xff, 0xff, 0, 0,
1870 0xff, 0xff, 0xff, 0xff, 0x80, 0x14, 0, 0,
1871 0, 0, 0, 0};
1872
1873 static int resp_caching_pg(unsigned char * p, int pcontrol, int target)
1874 { /* Caching page for mode_sense */
1875 unsigned char ch_caching_pg[] = {/* 0x8, 18, */ 0x4, 0, 0, 0, 0, 0,
1876 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
1877 unsigned char d_caching_pg[] = {0x8, 18, 0x14, 0, 0xff, 0xff, 0, 0,
1878 0xff, 0xff, 0xff, 0xff, 0x80, 0x14, 0, 0, 0, 0, 0, 0};
1879
1880 if (SDEBUG_OPT_N_WCE & sdebug_opts)
1881 caching_pg[2] &= ~0x4; /* set WCE=0 (default WCE=1) */
1882 memcpy(p, caching_pg, sizeof(caching_pg));
1883 if (1 == pcontrol)
1884 memcpy(p + 2, ch_caching_pg, sizeof(ch_caching_pg));
1885 else if (2 == pcontrol)
1886 memcpy(p, d_caching_pg, sizeof(d_caching_pg));
1887 return sizeof(caching_pg);
1888 }
1889
1890 static unsigned char ctrl_m_pg[] = {0xa, 10, 2, 0, 0, 0, 0, 0,
1891 0, 0, 0x2, 0x4b};
1892
1893 static int resp_ctrl_m_pg(unsigned char * p, int pcontrol, int target)
1894 { /* Control mode page for mode_sense */
1895 unsigned char ch_ctrl_m_pg[] = {/* 0xa, 10, */ 0x6, 0, 0, 0, 0, 0,
1896 0, 0, 0, 0};
1897 unsigned char d_ctrl_m_pg[] = {0xa, 10, 2, 0, 0, 0, 0, 0,
1898 0, 0, 0x2, 0x4b};
1899
1900 if (sdebug_dsense)
1901 ctrl_m_pg[2] |= 0x4;
1902 else
1903 ctrl_m_pg[2] &= ~0x4;
1904
1905 if (sdebug_ato)
1906 ctrl_m_pg[5] |= 0x80; /* ATO=1 */
1907
1908 memcpy(p, ctrl_m_pg, sizeof(ctrl_m_pg));
1909 if (1 == pcontrol)
1910 memcpy(p + 2, ch_ctrl_m_pg, sizeof(ch_ctrl_m_pg));
1911 else if (2 == pcontrol)
1912 memcpy(p, d_ctrl_m_pg, sizeof(d_ctrl_m_pg));
1913 return sizeof(ctrl_m_pg);
1914 }
1915
1916
1917 static int resp_iec_m_pg(unsigned char * p, int pcontrol, int target)
1918 { /* Informational Exceptions control mode page for mode_sense */
1919 unsigned char ch_iec_m_pg[] = {/* 0x1c, 0xa, */ 0x4, 0xf, 0, 0, 0, 0,
1920 0, 0, 0x0, 0x0};
1921 unsigned char d_iec_m_pg[] = {0x1c, 0xa, 0x08, 0, 0, 0, 0, 0,
1922 0, 0, 0x0, 0x0};
1923
1924 memcpy(p, iec_m_pg, sizeof(iec_m_pg));
1925 if (1 == pcontrol)
1926 memcpy(p + 2, ch_iec_m_pg, sizeof(ch_iec_m_pg));
1927 else if (2 == pcontrol)
1928 memcpy(p, d_iec_m_pg, sizeof(d_iec_m_pg));
1929 return sizeof(iec_m_pg);
1930 }
1931
1932 static int resp_sas_sf_m_pg(unsigned char * p, int pcontrol, int target)
1933 { /* SAS SSP mode page - short format for mode_sense */
1934 unsigned char sas_sf_m_pg[] = {0x19, 0x6,
1935 0x6, 0x0, 0x7, 0xd0, 0x0, 0x0};
1936
1937 memcpy(p, sas_sf_m_pg, sizeof(sas_sf_m_pg));
1938 if (1 == pcontrol)
1939 memset(p + 2, 0, sizeof(sas_sf_m_pg) - 2);
1940 return sizeof(sas_sf_m_pg);
1941 }
1942
1943
1944 static int resp_sas_pcd_m_spg(unsigned char * p, int pcontrol, int target,
1945 int target_dev_id)
1946 { /* SAS phy control and discover mode page for mode_sense */
1947 unsigned char sas_pcd_m_pg[] = {0x59, 0x1, 0, 0x64, 0, 0x6, 0, 2,
1948 0, 0, 0, 0, 0x10, 0x9, 0x8, 0x0,
1949 0, 0, 0, 0, 0, 0, 0, 0, /* insert SAS addr */
1950 0, 0, 0, 0, 0, 0, 0, 0, /* insert SAS addr */
1951 0x2, 0, 0, 0, 0, 0, 0, 0,
1952 0x88, 0x99, 0, 0, 0, 0, 0, 0,
1953 0, 0, 0, 0, 0, 0, 0, 0,
1954 0, 1, 0, 0, 0x10, 0x9, 0x8, 0x0,
1955 0, 0, 0, 0, 0, 0, 0, 0, /* insert SAS addr */
1956 0, 0, 0, 0, 0, 0, 0, 0, /* insert SAS addr */
1957 0x3, 0, 0, 0, 0, 0, 0, 0,
1958 0x88, 0x99, 0, 0, 0, 0, 0, 0,
1959 0, 0, 0, 0, 0, 0, 0, 0,
1960 };
1961 int port_a, port_b;
1962
1963 put_unaligned_be64(naa3_comp_a, sas_pcd_m_pg + 16);
1964 put_unaligned_be64(naa3_comp_c + 1, sas_pcd_m_pg + 24);
1965 put_unaligned_be64(naa3_comp_a, sas_pcd_m_pg + 64);
1966 put_unaligned_be64(naa3_comp_c + 1, sas_pcd_m_pg + 72);
1967 port_a = target_dev_id + 1;
1968 port_b = port_a + 1;
1969 memcpy(p, sas_pcd_m_pg, sizeof(sas_pcd_m_pg));
1970 put_unaligned_be32(port_a, p + 20);
1971 put_unaligned_be32(port_b, p + 48 + 20);
1972 if (1 == pcontrol)
1973 memset(p + 4, 0, sizeof(sas_pcd_m_pg) - 4);
1974 return sizeof(sas_pcd_m_pg);
1975 }
1976
1977 static int resp_sas_sha_m_spg(unsigned char * p, int pcontrol)
1978 { /* SAS SSP shared protocol specific port mode subpage */
1979 unsigned char sas_sha_m_pg[] = {0x59, 0x2, 0, 0xc, 0, 0x6, 0x10, 0,
1980 0, 0, 0, 0, 0, 0, 0, 0,
1981 };
1982
1983 memcpy(p, sas_sha_m_pg, sizeof(sas_sha_m_pg));
1984 if (1 == pcontrol)
1985 memset(p + 4, 0, sizeof(sas_sha_m_pg) - 4);
1986 return sizeof(sas_sha_m_pg);
1987 }
1988
1989 #define SDEBUG_MAX_MSENSE_SZ 256
1990
1991 static int resp_mode_sense(struct scsi_cmnd *scp,
1992 struct sdebug_dev_info *devip)
1993 {
1994 int pcontrol, pcode, subpcode, bd_len;
1995 unsigned char dev_spec;
1996 int alloc_len, offset, len, target_dev_id;
1997 int target = scp->device->id;
1998 unsigned char * ap;
1999 unsigned char arr[SDEBUG_MAX_MSENSE_SZ];
2000 unsigned char *cmd = scp->cmnd;
2001 bool dbd, llbaa, msense_6, is_disk, bad_pcode;
2002
2003 dbd = !!(cmd[1] & 0x8); /* disable block descriptors */
2004 pcontrol = (cmd[2] & 0xc0) >> 6;
2005 pcode = cmd[2] & 0x3f;
2006 subpcode = cmd[3];
2007 msense_6 = (MODE_SENSE == cmd[0]);
2008 llbaa = msense_6 ? false : !!(cmd[1] & 0x10);
2009 is_disk = (sdebug_ptype == TYPE_DISK);
2010 if (is_disk && !dbd)
2011 bd_len = llbaa ? 16 : 8;
2012 else
2013 bd_len = 0;
2014 alloc_len = msense_6 ? cmd[4] : get_unaligned_be16(cmd + 7);
2015 memset(arr, 0, SDEBUG_MAX_MSENSE_SZ);
2016 if (0x3 == pcontrol) { /* Saving values not supported */
2017 mk_sense_buffer(scp, ILLEGAL_REQUEST, SAVING_PARAMS_UNSUP, 0);
2018 return check_condition_result;
2019 }
2020 target_dev_id = ((devip->sdbg_host->shost->host_no + 1) * 2000) +
2021 (devip->target * 1000) - 3;
2022 /* for disks set DPOFUA bit and clear write protect (WP) bit */
2023 if (is_disk)
2024 dev_spec = 0x10; /* =0x90 if WP=1 implies read-only */
2025 else
2026 dev_spec = 0x0;
2027 if (msense_6) {
2028 arr[2] = dev_spec;
2029 arr[3] = bd_len;
2030 offset = 4;
2031 } else {
2032 arr[3] = dev_spec;
2033 if (16 == bd_len)
2034 arr[4] = 0x1; /* set LONGLBA bit */
2035 arr[7] = bd_len; /* assume 255 or less */
2036 offset = 8;
2037 }
2038 ap = arr + offset;
2039 if ((bd_len > 0) && (!sdebug_capacity))
2040 sdebug_capacity = get_sdebug_capacity();
2041
2042 if (8 == bd_len) {
2043 if (sdebug_capacity > 0xfffffffe)
2044 put_unaligned_be32(0xffffffff, ap + 0);
2045 else
2046 put_unaligned_be32(sdebug_capacity, ap + 0);
2047 put_unaligned_be16(sdebug_sector_size, ap + 6);
2048 offset += bd_len;
2049 ap = arr + offset;
2050 } else if (16 == bd_len) {
2051 put_unaligned_be64((u64)sdebug_capacity, ap + 0);
2052 put_unaligned_be32(sdebug_sector_size, ap + 12);
2053 offset += bd_len;
2054 ap = arr + offset;
2055 }
2056
2057 if ((subpcode > 0x0) && (subpcode < 0xff) && (0x19 != pcode)) {
2058 /* TODO: Control Extension page */
2059 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1);
2060 return check_condition_result;
2061 }
2062 bad_pcode = false;
2063
2064 switch (pcode) {
2065 case 0x1: /* Read-Write error recovery page, direct access */
2066 len = resp_err_recov_pg(ap, pcontrol, target);
2067 offset += len;
2068 break;
2069 case 0x2: /* Disconnect-Reconnect page, all devices */
2070 len = resp_disconnect_pg(ap, pcontrol, target);
2071 offset += len;
2072 break;
2073 case 0x3: /* Format device page, direct access */
2074 if (is_disk) {
2075 len = resp_format_pg(ap, pcontrol, target);
2076 offset += len;
2077 } else
2078 bad_pcode = true;
2079 break;
2080 case 0x8: /* Caching page, direct access */
2081 if (is_disk) {
2082 len = resp_caching_pg(ap, pcontrol, target);
2083 offset += len;
2084 } else
2085 bad_pcode = true;
2086 break;
2087 case 0xa: /* Control Mode page, all devices */
2088 len = resp_ctrl_m_pg(ap, pcontrol, target);
2089 offset += len;
2090 break;
2091 case 0x19: /* if spc==1 then sas phy, control+discover */
2092 if ((subpcode > 0x2) && (subpcode < 0xff)) {
2093 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1);
2094 return check_condition_result;
2095 }
2096 len = 0;
2097 if ((0x0 == subpcode) || (0xff == subpcode))
2098 len += resp_sas_sf_m_pg(ap + len, pcontrol, target);
2099 if ((0x1 == subpcode) || (0xff == subpcode))
2100 len += resp_sas_pcd_m_spg(ap + len, pcontrol, target,
2101 target_dev_id);
2102 if ((0x2 == subpcode) || (0xff == subpcode))
2103 len += resp_sas_sha_m_spg(ap + len, pcontrol);
2104 offset += len;
2105 break;
2106 case 0x1c: /* Informational Exceptions Mode page, all devices */
2107 len = resp_iec_m_pg(ap, pcontrol, target);
2108 offset += len;
2109 break;
2110 case 0x3f: /* Read all Mode pages */
2111 if ((0 == subpcode) || (0xff == subpcode)) {
2112 len = resp_err_recov_pg(ap, pcontrol, target);
2113 len += resp_disconnect_pg(ap + len, pcontrol, target);
2114 if (is_disk) {
2115 len += resp_format_pg(ap + len, pcontrol,
2116 target);
2117 len += resp_caching_pg(ap + len, pcontrol,
2118 target);
2119 }
2120 len += resp_ctrl_m_pg(ap + len, pcontrol, target);
2121 len += resp_sas_sf_m_pg(ap + len, pcontrol, target);
2122 if (0xff == subpcode) {
2123 len += resp_sas_pcd_m_spg(ap + len, pcontrol,
2124 target, target_dev_id);
2125 len += resp_sas_sha_m_spg(ap + len, pcontrol);
2126 }
2127 len += resp_iec_m_pg(ap + len, pcontrol, target);
2128 offset += len;
2129 } else {
2130 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1);
2131 return check_condition_result;
2132 }
2133 break;
2134 default:
2135 bad_pcode = true;
2136 break;
2137 }
2138 if (bad_pcode) {
2139 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 5);
2140 return check_condition_result;
2141 }
2142 if (msense_6)
2143 arr[0] = offset - 1;
2144 else
2145 put_unaligned_be16((offset - 2), arr + 0);
2146 return fill_from_dev_buffer(scp, arr, min(alloc_len, offset));
2147 }
2148
2149 #define SDEBUG_MAX_MSELECT_SZ 512
2150
2151 static int resp_mode_select(struct scsi_cmnd *scp,
2152 struct sdebug_dev_info *devip)
2153 {
2154 int pf, sp, ps, md_len, bd_len, off, spf, pg_len;
2155 int param_len, res, mpage;
2156 unsigned char arr[SDEBUG_MAX_MSELECT_SZ];
2157 unsigned char *cmd = scp->cmnd;
2158 int mselect6 = (MODE_SELECT == cmd[0]);
2159
2160 memset(arr, 0, sizeof(arr));
2161 pf = cmd[1] & 0x10;
2162 sp = cmd[1] & 0x1;
2163 param_len = mselect6 ? cmd[4] : get_unaligned_be16(cmd + 7);
2164 if ((0 == pf) || sp || (param_len > SDEBUG_MAX_MSELECT_SZ)) {
2165 mk_sense_invalid_fld(scp, SDEB_IN_CDB, mselect6 ? 4 : 7, -1);
2166 return check_condition_result;
2167 }
2168 res = fetch_to_dev_buffer(scp, arr, param_len);
2169 if (-1 == res)
2170 return DID_ERROR << 16;
2171 else if (sdebug_verbose && (res < param_len))
2172 sdev_printk(KERN_INFO, scp->device,
2173 "%s: cdb indicated=%d, IO sent=%d bytes\n",
2174 __func__, param_len, res);
2175 md_len = mselect6 ? (arr[0] + 1) : (get_unaligned_be16(arr + 0) + 2);
2176 bd_len = mselect6 ? arr[3] : get_unaligned_be16(arr + 6);
2177 if (md_len > 2) {
2178 mk_sense_invalid_fld(scp, SDEB_IN_DATA, 0, -1);
2179 return check_condition_result;
2180 }
2181 off = bd_len + (mselect6 ? 4 : 8);
2182 mpage = arr[off] & 0x3f;
2183 ps = !!(arr[off] & 0x80);
2184 if (ps) {
2185 mk_sense_invalid_fld(scp, SDEB_IN_DATA, off, 7);
2186 return check_condition_result;
2187 }
2188 spf = !!(arr[off] & 0x40);
2189 pg_len = spf ? (get_unaligned_be16(arr + off + 2) + 4) :
2190 (arr[off + 1] + 2);
2191 if ((pg_len + off) > param_len) {
2192 mk_sense_buffer(scp, ILLEGAL_REQUEST,
2193 PARAMETER_LIST_LENGTH_ERR, 0);
2194 return check_condition_result;
2195 }
2196 switch (mpage) {
2197 case 0x8: /* Caching Mode page */
2198 if (caching_pg[1] == arr[off + 1]) {
2199 memcpy(caching_pg + 2, arr + off + 2,
2200 sizeof(caching_pg) - 2);
2201 goto set_mode_changed_ua;
2202 }
2203 break;
2204 case 0xa: /* Control Mode page */
2205 if (ctrl_m_pg[1] == arr[off + 1]) {
2206 memcpy(ctrl_m_pg + 2, arr + off + 2,
2207 sizeof(ctrl_m_pg) - 2);
2208 sdebug_dsense = !!(ctrl_m_pg[2] & 0x4);
2209 goto set_mode_changed_ua;
2210 }
2211 break;
2212 case 0x1c: /* Informational Exceptions Mode page */
2213 if (iec_m_pg[1] == arr[off + 1]) {
2214 memcpy(iec_m_pg + 2, arr + off + 2,
2215 sizeof(iec_m_pg) - 2);
2216 goto set_mode_changed_ua;
2217 }
2218 break;
2219 default:
2220 break;
2221 }
2222 mk_sense_invalid_fld(scp, SDEB_IN_DATA, off, 5);
2223 return check_condition_result;
2224 set_mode_changed_ua:
2225 set_bit(SDEBUG_UA_MODE_CHANGED, devip->uas_bm);
2226 return 0;
2227 }
2228
2229 static int resp_temp_l_pg(unsigned char * arr)
2230 {
2231 unsigned char temp_l_pg[] = {0x0, 0x0, 0x3, 0x2, 0x0, 38,
2232 0x0, 0x1, 0x3, 0x2, 0x0, 65,
2233 };
2234
2235 memcpy(arr, temp_l_pg, sizeof(temp_l_pg));
2236 return sizeof(temp_l_pg);
2237 }
2238
2239 static int resp_ie_l_pg(unsigned char * arr)
2240 {
2241 unsigned char ie_l_pg[] = {0x0, 0x0, 0x3, 0x3, 0x0, 0x0, 38,
2242 };
2243
2244 memcpy(arr, ie_l_pg, sizeof(ie_l_pg));
2245 if (iec_m_pg[2] & 0x4) { /* TEST bit set */
2246 arr[4] = THRESHOLD_EXCEEDED;
2247 arr[5] = 0xff;
2248 }
2249 return sizeof(ie_l_pg);
2250 }
2251
2252 #define SDEBUG_MAX_LSENSE_SZ 512
2253
2254 static int resp_log_sense(struct scsi_cmnd * scp,
2255 struct sdebug_dev_info * devip)
2256 {
2257 int ppc, sp, pcontrol, pcode, subpcode, alloc_len, len, n;
2258 unsigned char arr[SDEBUG_MAX_LSENSE_SZ];
2259 unsigned char *cmd = scp->cmnd;
2260
2261 memset(arr, 0, sizeof(arr));
2262 ppc = cmd[1] & 0x2;
2263 sp = cmd[1] & 0x1;
2264 if (ppc || sp) {
2265 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, ppc ? 1 : 0);
2266 return check_condition_result;
2267 }
2268 pcontrol = (cmd[2] & 0xc0) >> 6;
2269 pcode = cmd[2] & 0x3f;
2270 subpcode = cmd[3] & 0xff;
2271 alloc_len = get_unaligned_be16(cmd + 7);
2272 arr[0] = pcode;
2273 if (0 == subpcode) {
2274 switch (pcode) {
2275 case 0x0: /* Supported log pages log page */
2276 n = 4;
2277 arr[n++] = 0x0; /* this page */
2278 arr[n++] = 0xd; /* Temperature */
2279 arr[n++] = 0x2f; /* Informational exceptions */
2280 arr[3] = n - 4;
2281 break;
2282 case 0xd: /* Temperature log page */
2283 arr[3] = resp_temp_l_pg(arr + 4);
2284 break;
2285 case 0x2f: /* Informational exceptions log page */
2286 arr[3] = resp_ie_l_pg(arr + 4);
2287 break;
2288 default:
2289 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 5);
2290 return check_condition_result;
2291 }
2292 } else if (0xff == subpcode) {
2293 arr[0] |= 0x40;
2294 arr[1] = subpcode;
2295 switch (pcode) {
2296 case 0x0: /* Supported log pages and subpages log page */
2297 n = 4;
2298 arr[n++] = 0x0;
2299 arr[n++] = 0x0; /* 0,0 page */
2300 arr[n++] = 0x0;
2301 arr[n++] = 0xff; /* this page */
2302 arr[n++] = 0xd;
2303 arr[n++] = 0x0; /* Temperature */
2304 arr[n++] = 0x2f;
2305 arr[n++] = 0x0; /* Informational exceptions */
2306 arr[3] = n - 4;
2307 break;
2308 case 0xd: /* Temperature subpages */
2309 n = 4;
2310 arr[n++] = 0xd;
2311 arr[n++] = 0x0; /* Temperature */
2312 arr[3] = n - 4;
2313 break;
2314 case 0x2f: /* Informational exceptions subpages */
2315 n = 4;
2316 arr[n++] = 0x2f;
2317 arr[n++] = 0x0; /* Informational exceptions */
2318 arr[3] = n - 4;
2319 break;
2320 default:
2321 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 5);
2322 return check_condition_result;
2323 }
2324 } else {
2325 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1);
2326 return check_condition_result;
2327 }
2328 len = min(get_unaligned_be16(arr + 2) + 4, alloc_len);
2329 return fill_from_dev_buffer(scp, arr,
2330 min(len, SDEBUG_MAX_INQ_ARR_SZ));
2331 }
2332
2333 static int check_device_access_params(struct scsi_cmnd *scp,
2334 unsigned long long lba, unsigned int num)
2335 {
2336 if (lba + num > sdebug_capacity) {
2337 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
2338 return check_condition_result;
2339 }
2340 /* transfer length excessive (tie in to block limits VPD page) */
2341 if (num > sdebug_store_sectors) {
2342 /* needs work to find which cdb byte 'num' comes from */
2343 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
2344 return check_condition_result;
2345 }
2346 return 0;
2347 }
2348
2349 /* Returns number of bytes copied or -1 if error. */
2350 static int do_device_access(struct scsi_cmnd *scmd, u64 lba, u32 num,
2351 bool do_write)
2352 {
2353 int ret;
2354 u64 block, rest = 0;
2355 struct scsi_data_buffer *sdb;
2356 enum dma_data_direction dir;
2357
2358 if (do_write) {
2359 sdb = scsi_out(scmd);
2360 dir = DMA_TO_DEVICE;
2361 } else {
2362 sdb = scsi_in(scmd);
2363 dir = DMA_FROM_DEVICE;
2364 }
2365
2366 if (!sdb->length)
2367 return 0;
2368 if (!(scsi_bidi_cmnd(scmd) || scmd->sc_data_direction == dir))
2369 return -1;
2370
2371 block = do_div(lba, sdebug_store_sectors);
2372 if (block + num > sdebug_store_sectors)
2373 rest = block + num - sdebug_store_sectors;
2374
2375 ret = sg_copy_buffer(sdb->table.sgl, sdb->table.nents,
2376 fake_storep + (block * sdebug_sector_size),
2377 (num - rest) * sdebug_sector_size, 0, do_write);
2378 if (ret != (num - rest) * sdebug_sector_size)
2379 return ret;
2380
2381 if (rest) {
2382 ret += sg_copy_buffer(sdb->table.sgl, sdb->table.nents,
2383 fake_storep, rest * sdebug_sector_size,
2384 (num - rest) * sdebug_sector_size, do_write);
2385 }
2386
2387 return ret;
2388 }
2389
2390 /* If fake_store(lba,num) compares equal to arr(num), then copy top half of
2391 * arr into fake_store(lba,num) and return true. If comparison fails then
2392 * return false. */
2393 static bool comp_write_worker(u64 lba, u32 num, const u8 *arr)
2394 {
2395 bool res;
2396 u64 block, rest = 0;
2397 u32 store_blks = sdebug_store_sectors;
2398 u32 lb_size = sdebug_sector_size;
2399
2400 block = do_div(lba, store_blks);
2401 if (block + num > store_blks)
2402 rest = block + num - store_blks;
2403
2404 res = !memcmp(fake_storep + (block * lb_size), arr,
2405 (num - rest) * lb_size);
2406 if (!res)
2407 return res;
2408 if (rest)
2409 res = memcmp(fake_storep, arr + ((num - rest) * lb_size),
2410 rest * lb_size);
2411 if (!res)
2412 return res;
2413 arr += num * lb_size;
2414 memcpy(fake_storep + (block * lb_size), arr, (num - rest) * lb_size);
2415 if (rest)
2416 memcpy(fake_storep, arr + ((num - rest) * lb_size),
2417 rest * lb_size);
2418 return res;
2419 }
2420
2421 static __be16 dif_compute_csum(const void *buf, int len)
2422 {
2423 __be16 csum;
2424
2425 if (sdebug_guard)
2426 csum = (__force __be16)ip_compute_csum(buf, len);
2427 else
2428 csum = cpu_to_be16(crc_t10dif(buf, len));
2429
2430 return csum;
2431 }
2432
2433 static int dif_verify(struct sd_dif_tuple *sdt, const void *data,
2434 sector_t sector, u32 ei_lba)
2435 {
2436 __be16 csum = dif_compute_csum(data, sdebug_sector_size);
2437
2438 if (sdt->guard_tag != csum) {
2439 pr_err("GUARD check failed on sector %lu rcvd 0x%04x, data 0x%04x\n",
2440 (unsigned long)sector,
2441 be16_to_cpu(sdt->guard_tag),
2442 be16_to_cpu(csum));
2443 return 0x01;
2444 }
2445 if (sdebug_dif == SD_DIF_TYPE1_PROTECTION &&
2446 be32_to_cpu(sdt->ref_tag) != (sector & 0xffffffff)) {
2447 pr_err("REF check failed on sector %lu\n",
2448 (unsigned long)sector);
2449 return 0x03;
2450 }
2451 if (sdebug_dif == SD_DIF_TYPE2_PROTECTION &&
2452 be32_to_cpu(sdt->ref_tag) != ei_lba) {
2453 pr_err("REF check failed on sector %lu\n",
2454 (unsigned long)sector);
2455 return 0x03;
2456 }
2457 return 0;
2458 }
2459
2460 static void dif_copy_prot(struct scsi_cmnd *SCpnt, sector_t sector,
2461 unsigned int sectors, bool read)
2462 {
2463 size_t resid;
2464 void *paddr;
2465 const void *dif_store_end = dif_storep + sdebug_store_sectors;
2466 struct sg_mapping_iter miter;
2467
2468 /* Bytes of protection data to copy into sgl */
2469 resid = sectors * sizeof(*dif_storep);
2470
2471 sg_miter_start(&miter, scsi_prot_sglist(SCpnt),
2472 scsi_prot_sg_count(SCpnt), SG_MITER_ATOMIC |
2473 (read ? SG_MITER_TO_SG : SG_MITER_FROM_SG));
2474
2475 while (sg_miter_next(&miter) && resid > 0) {
2476 size_t len = min(miter.length, resid);
2477 void *start = dif_store(sector);
2478 size_t rest = 0;
2479
2480 if (dif_store_end < start + len)
2481 rest = start + len - dif_store_end;
2482
2483 paddr = miter.addr;
2484
2485 if (read)
2486 memcpy(paddr, start, len - rest);
2487 else
2488 memcpy(start, paddr, len - rest);
2489
2490 if (rest) {
2491 if (read)
2492 memcpy(paddr + len - rest, dif_storep, rest);
2493 else
2494 memcpy(dif_storep, paddr + len - rest, rest);
2495 }
2496
2497 sector += len / sizeof(*dif_storep);
2498 resid -= len;
2499 }
2500 sg_miter_stop(&miter);
2501 }
2502
2503 static int prot_verify_read(struct scsi_cmnd *SCpnt, sector_t start_sec,
2504 unsigned int sectors, u32 ei_lba)
2505 {
2506 unsigned int i;
2507 struct sd_dif_tuple *sdt;
2508 sector_t sector;
2509
2510 for (i = 0; i < sectors; i++, ei_lba++) {
2511 int ret;
2512
2513 sector = start_sec + i;
2514 sdt = dif_store(sector);
2515
2516 if (sdt->app_tag == cpu_to_be16(0xffff))
2517 continue;
2518
2519 ret = dif_verify(sdt, fake_store(sector), sector, ei_lba);
2520 if (ret) {
2521 dif_errors++;
2522 return ret;
2523 }
2524 }
2525
2526 dif_copy_prot(SCpnt, start_sec, sectors, true);
2527 dix_reads++;
2528
2529 return 0;
2530 }
2531
2532 static int resp_read_dt0(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
2533 {
2534 u8 *cmd = scp->cmnd;
2535 struct sdebug_queued_cmd *sqcp;
2536 u64 lba;
2537 u32 num;
2538 u32 ei_lba;
2539 unsigned long iflags;
2540 int ret;
2541 bool check_prot;
2542
2543 switch (cmd[0]) {
2544 case READ_16:
2545 ei_lba = 0;
2546 lba = get_unaligned_be64(cmd + 2);
2547 num = get_unaligned_be32(cmd + 10);
2548 check_prot = true;
2549 break;
2550 case READ_10:
2551 ei_lba = 0;
2552 lba = get_unaligned_be32(cmd + 2);
2553 num = get_unaligned_be16(cmd + 7);
2554 check_prot = true;
2555 break;
2556 case READ_6:
2557 ei_lba = 0;
2558 lba = (u32)cmd[3] | (u32)cmd[2] << 8 |
2559 (u32)(cmd[1] & 0x1f) << 16;
2560 num = (0 == cmd[4]) ? 256 : cmd[4];
2561 check_prot = true;
2562 break;
2563 case READ_12:
2564 ei_lba = 0;
2565 lba = get_unaligned_be32(cmd + 2);
2566 num = get_unaligned_be32(cmd + 6);
2567 check_prot = true;
2568 break;
2569 case XDWRITEREAD_10:
2570 ei_lba = 0;
2571 lba = get_unaligned_be32(cmd + 2);
2572 num = get_unaligned_be16(cmd + 7);
2573 check_prot = false;
2574 break;
2575 default: /* assume READ(32) */
2576 lba = get_unaligned_be64(cmd + 12);
2577 ei_lba = get_unaligned_be32(cmd + 20);
2578 num = get_unaligned_be32(cmd + 28);
2579 check_prot = false;
2580 break;
2581 }
2582 if (unlikely(have_dif_prot && check_prot)) {
2583 if (sdebug_dif == SD_DIF_TYPE2_PROTECTION &&
2584 (cmd[1] & 0xe0)) {
2585 mk_sense_invalid_opcode(scp);
2586 return check_condition_result;
2587 }
2588 if ((sdebug_dif == SD_DIF_TYPE1_PROTECTION ||
2589 sdebug_dif == SD_DIF_TYPE3_PROTECTION) &&
2590 (cmd[1] & 0xe0) == 0)
2591 sdev_printk(KERN_ERR, scp->device, "Unprotected RD "
2592 "to DIF device\n");
2593 }
2594 if (unlikely(sdebug_any_injecting_opt)) {
2595 sqcp = (struct sdebug_queued_cmd *)scp->host_scribble;
2596
2597 if (sqcp) {
2598 if (sqcp->inj_short)
2599 num /= 2;
2600 }
2601 } else
2602 sqcp = NULL;
2603
2604 /* inline check_device_access_params() */
2605 if (unlikely(lba + num > sdebug_capacity)) {
2606 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
2607 return check_condition_result;
2608 }
2609 /* transfer length excessive (tie in to block limits VPD page) */
2610 if (unlikely(num > sdebug_store_sectors)) {
2611 /* needs work to find which cdb byte 'num' comes from */
2612 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
2613 return check_condition_result;
2614 }
2615
2616 if (unlikely((SDEBUG_OPT_MEDIUM_ERR & sdebug_opts) &&
2617 (lba <= (OPT_MEDIUM_ERR_ADDR + OPT_MEDIUM_ERR_NUM - 1)) &&
2618 ((lba + num) > OPT_MEDIUM_ERR_ADDR))) {
2619 /* claim unrecoverable read error */
2620 mk_sense_buffer(scp, MEDIUM_ERROR, UNRECOVERED_READ_ERR, 0);
2621 /* set info field and valid bit for fixed descriptor */
2622 if (0x70 == (scp->sense_buffer[0] & 0x7f)) {
2623 scp->sense_buffer[0] |= 0x80; /* Valid bit */
2624 ret = (lba < OPT_MEDIUM_ERR_ADDR)
2625 ? OPT_MEDIUM_ERR_ADDR : (int)lba;
2626 put_unaligned_be32(ret, scp->sense_buffer + 3);
2627 }
2628 scsi_set_resid(scp, scsi_bufflen(scp));
2629 return check_condition_result;
2630 }
2631
2632 read_lock_irqsave(&atomic_rw, iflags);
2633
2634 /* DIX + T10 DIF */
2635 if (unlikely(sdebug_dix && scsi_prot_sg_count(scp))) {
2636 int prot_ret = prot_verify_read(scp, lba, num, ei_lba);
2637
2638 if (prot_ret) {
2639 read_unlock_irqrestore(&atomic_rw, iflags);
2640 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, prot_ret);
2641 return illegal_condition_result;
2642 }
2643 }
2644
2645 ret = do_device_access(scp, lba, num, false);
2646 read_unlock_irqrestore(&atomic_rw, iflags);
2647 if (unlikely(ret == -1))
2648 return DID_ERROR << 16;
2649
2650 scsi_in(scp)->resid = scsi_bufflen(scp) - ret;
2651
2652 if (unlikely(sqcp)) {
2653 if (sqcp->inj_recovered) {
2654 mk_sense_buffer(scp, RECOVERED_ERROR,
2655 THRESHOLD_EXCEEDED, 0);
2656 return check_condition_result;
2657 } else if (sqcp->inj_transport) {
2658 mk_sense_buffer(scp, ABORTED_COMMAND,
2659 TRANSPORT_PROBLEM, ACK_NAK_TO);
2660 return check_condition_result;
2661 } else if (sqcp->inj_dif) {
2662 /* Logical block guard check failed */
2663 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 1);
2664 return illegal_condition_result;
2665 } else if (sqcp->inj_dix) {
2666 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 1);
2667 return illegal_condition_result;
2668 }
2669 }
2670 return 0;
2671 }
2672
2673 static void dump_sector(unsigned char *buf, int len)
2674 {
2675 int i, j, n;
2676
2677 pr_err(">>> Sector Dump <<<\n");
2678 for (i = 0 ; i < len ; i += 16) {
2679 char b[128];
2680
2681 for (j = 0, n = 0; j < 16; j++) {
2682 unsigned char c = buf[i+j];
2683
2684 if (c >= 0x20 && c < 0x7e)
2685 n += scnprintf(b + n, sizeof(b) - n,
2686 " %c ", buf[i+j]);
2687 else
2688 n += scnprintf(b + n, sizeof(b) - n,
2689 "%02x ", buf[i+j]);
2690 }
2691 pr_err("%04d: %s\n", i, b);
2692 }
2693 }
2694
2695 static int prot_verify_write(struct scsi_cmnd *SCpnt, sector_t start_sec,
2696 unsigned int sectors, u32 ei_lba)
2697 {
2698 int ret;
2699 struct sd_dif_tuple *sdt;
2700 void *daddr;
2701 sector_t sector = start_sec;
2702 int ppage_offset;
2703 int dpage_offset;
2704 struct sg_mapping_iter diter;
2705 struct sg_mapping_iter piter;
2706
2707 BUG_ON(scsi_sg_count(SCpnt) == 0);
2708 BUG_ON(scsi_prot_sg_count(SCpnt) == 0);
2709
2710 sg_miter_start(&piter, scsi_prot_sglist(SCpnt),
2711 scsi_prot_sg_count(SCpnt),
2712 SG_MITER_ATOMIC | SG_MITER_FROM_SG);
2713 sg_miter_start(&diter, scsi_sglist(SCpnt), scsi_sg_count(SCpnt),
2714 SG_MITER_ATOMIC | SG_MITER_FROM_SG);
2715
2716 /* For each protection page */
2717 while (sg_miter_next(&piter)) {
2718 dpage_offset = 0;
2719 if (WARN_ON(!sg_miter_next(&diter))) {
2720 ret = 0x01;
2721 goto out;
2722 }
2723
2724 for (ppage_offset = 0; ppage_offset < piter.length;
2725 ppage_offset += sizeof(struct sd_dif_tuple)) {
2726 /* If we're at the end of the current
2727 * data page advance to the next one
2728 */
2729 if (dpage_offset >= diter.length) {
2730 if (WARN_ON(!sg_miter_next(&diter))) {
2731 ret = 0x01;
2732 goto out;
2733 }
2734 dpage_offset = 0;
2735 }
2736
2737 sdt = piter.addr + ppage_offset;
2738 daddr = diter.addr + dpage_offset;
2739
2740 ret = dif_verify(sdt, daddr, sector, ei_lba);
2741 if (ret) {
2742 dump_sector(daddr, sdebug_sector_size);
2743 goto out;
2744 }
2745
2746 sector++;
2747 ei_lba++;
2748 dpage_offset += sdebug_sector_size;
2749 }
2750 diter.consumed = dpage_offset;
2751 sg_miter_stop(&diter);
2752 }
2753 sg_miter_stop(&piter);
2754
2755 dif_copy_prot(SCpnt, start_sec, sectors, false);
2756 dix_writes++;
2757
2758 return 0;
2759
2760 out:
2761 dif_errors++;
2762 sg_miter_stop(&diter);
2763 sg_miter_stop(&piter);
2764 return ret;
2765 }
2766
2767 static unsigned long lba_to_map_index(sector_t lba)
2768 {
2769 if (sdebug_unmap_alignment)
2770 lba += sdebug_unmap_granularity - sdebug_unmap_alignment;
2771 sector_div(lba, sdebug_unmap_granularity);
2772 return lba;
2773 }
2774
2775 static sector_t map_index_to_lba(unsigned long index)
2776 {
2777 sector_t lba = index * sdebug_unmap_granularity;
2778
2779 if (sdebug_unmap_alignment)
2780 lba -= sdebug_unmap_granularity - sdebug_unmap_alignment;
2781 return lba;
2782 }
2783
2784 static unsigned int map_state(sector_t lba, unsigned int *num)
2785 {
2786 sector_t end;
2787 unsigned int mapped;
2788 unsigned long index;
2789 unsigned long next;
2790
2791 index = lba_to_map_index(lba);
2792 mapped = test_bit(index, map_storep);
2793
2794 if (mapped)
2795 next = find_next_zero_bit(map_storep, map_size, index);
2796 else
2797 next = find_next_bit(map_storep, map_size, index);
2798
2799 end = min_t(sector_t, sdebug_store_sectors, map_index_to_lba(next));
2800 *num = end - lba;
2801 return mapped;
2802 }
2803
2804 static void map_region(sector_t lba, unsigned int len)
2805 {
2806 sector_t end = lba + len;
2807
2808 while (lba < end) {
2809 unsigned long index = lba_to_map_index(lba);
2810
2811 if (index < map_size)
2812 set_bit(index, map_storep);
2813
2814 lba = map_index_to_lba(index + 1);
2815 }
2816 }
2817
2818 static void unmap_region(sector_t lba, unsigned int len)
2819 {
2820 sector_t end = lba + len;
2821
2822 while (lba < end) {
2823 unsigned long index = lba_to_map_index(lba);
2824
2825 if (lba == map_index_to_lba(index) &&
2826 lba + sdebug_unmap_granularity <= end &&
2827 index < map_size) {
2828 clear_bit(index, map_storep);
2829 if (sdebug_lbprz) { /* for LBPRZ=2 return 0xff_s */
2830 memset(fake_storep +
2831 lba * sdebug_sector_size,
2832 (sdebug_lbprz & 1) ? 0 : 0xff,
2833 sdebug_sector_size *
2834 sdebug_unmap_granularity);
2835 }
2836 if (dif_storep) {
2837 memset(dif_storep + lba, 0xff,
2838 sizeof(*dif_storep) *
2839 sdebug_unmap_granularity);
2840 }
2841 }
2842 lba = map_index_to_lba(index + 1);
2843 }
2844 }
2845
2846 static int resp_write_dt0(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
2847 {
2848 u8 *cmd = scp->cmnd;
2849 u64 lba;
2850 u32 num;
2851 u32 ei_lba;
2852 unsigned long iflags;
2853 int ret;
2854 bool check_prot;
2855
2856 switch (cmd[0]) {
2857 case WRITE_16:
2858 ei_lba = 0;
2859 lba = get_unaligned_be64(cmd + 2);
2860 num = get_unaligned_be32(cmd + 10);
2861 check_prot = true;
2862 break;
2863 case WRITE_10:
2864 ei_lba = 0;
2865 lba = get_unaligned_be32(cmd + 2);
2866 num = get_unaligned_be16(cmd + 7);
2867 check_prot = true;
2868 break;
2869 case WRITE_6:
2870 ei_lba = 0;
2871 lba = (u32)cmd[3] | (u32)cmd[2] << 8 |
2872 (u32)(cmd[1] & 0x1f) << 16;
2873 num = (0 == cmd[4]) ? 256 : cmd[4];
2874 check_prot = true;
2875 break;
2876 case WRITE_12:
2877 ei_lba = 0;
2878 lba = get_unaligned_be32(cmd + 2);
2879 num = get_unaligned_be32(cmd + 6);
2880 check_prot = true;
2881 break;
2882 case 0x53: /* XDWRITEREAD(10) */
2883 ei_lba = 0;
2884 lba = get_unaligned_be32(cmd + 2);
2885 num = get_unaligned_be16(cmd + 7);
2886 check_prot = false;
2887 break;
2888 default: /* assume WRITE(32) */
2889 lba = get_unaligned_be64(cmd + 12);
2890 ei_lba = get_unaligned_be32(cmd + 20);
2891 num = get_unaligned_be32(cmd + 28);
2892 check_prot = false;
2893 break;
2894 }
2895 if (unlikely(have_dif_prot && check_prot)) {
2896 if (sdebug_dif == SD_DIF_TYPE2_PROTECTION &&
2897 (cmd[1] & 0xe0)) {
2898 mk_sense_invalid_opcode(scp);
2899 return check_condition_result;
2900 }
2901 if ((sdebug_dif == SD_DIF_TYPE1_PROTECTION ||
2902 sdebug_dif == SD_DIF_TYPE3_PROTECTION) &&
2903 (cmd[1] & 0xe0) == 0)
2904 sdev_printk(KERN_ERR, scp->device, "Unprotected WR "
2905 "to DIF device\n");
2906 }
2907
2908 /* inline check_device_access_params() */
2909 if (unlikely(lba + num > sdebug_capacity)) {
2910 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
2911 return check_condition_result;
2912 }
2913 /* transfer length excessive (tie in to block limits VPD page) */
2914 if (unlikely(num > sdebug_store_sectors)) {
2915 /* needs work to find which cdb byte 'num' comes from */
2916 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
2917 return check_condition_result;
2918 }
2919
2920 write_lock_irqsave(&atomic_rw, iflags);
2921
2922 /* DIX + T10 DIF */
2923 if (unlikely(sdebug_dix && scsi_prot_sg_count(scp))) {
2924 int prot_ret = prot_verify_write(scp, lba, num, ei_lba);
2925
2926 if (prot_ret) {
2927 write_unlock_irqrestore(&atomic_rw, iflags);
2928 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, prot_ret);
2929 return illegal_condition_result;
2930 }
2931 }
2932
2933 ret = do_device_access(scp, lba, num, true);
2934 if (unlikely(scsi_debug_lbp()))
2935 map_region(lba, num);
2936 write_unlock_irqrestore(&atomic_rw, iflags);
2937 if (unlikely(-1 == ret))
2938 return DID_ERROR << 16;
2939 else if (unlikely(sdebug_verbose &&
2940 (ret < (num * sdebug_sector_size))))
2941 sdev_printk(KERN_INFO, scp->device,
2942 "%s: write: cdb indicated=%u, IO sent=%d bytes\n",
2943 my_name, num * sdebug_sector_size, ret);
2944
2945 if (unlikely(sdebug_any_injecting_opt)) {
2946 struct sdebug_queued_cmd *sqcp =
2947 (struct sdebug_queued_cmd *)scp->host_scribble;
2948
2949 if (sqcp) {
2950 if (sqcp->inj_recovered) {
2951 mk_sense_buffer(scp, RECOVERED_ERROR,
2952 THRESHOLD_EXCEEDED, 0);
2953 return check_condition_result;
2954 } else if (sqcp->inj_dif) {
2955 /* Logical block guard check failed */
2956 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 1);
2957 return illegal_condition_result;
2958 } else if (sqcp->inj_dix) {
2959 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 1);
2960 return illegal_condition_result;
2961 }
2962 }
2963 }
2964 return 0;
2965 }
2966
2967 static int resp_write_same(struct scsi_cmnd *scp, u64 lba, u32 num,
2968 u32 ei_lba, bool unmap, bool ndob)
2969 {
2970 unsigned long iflags;
2971 unsigned long long i;
2972 int ret;
2973 u64 lba_off;
2974
2975 ret = check_device_access_params(scp, lba, num);
2976 if (ret)
2977 return ret;
2978
2979 write_lock_irqsave(&atomic_rw, iflags);
2980
2981 if (unmap && scsi_debug_lbp()) {
2982 unmap_region(lba, num);
2983 goto out;
2984 }
2985
2986 lba_off = lba * sdebug_sector_size;
2987 /* if ndob then zero 1 logical block, else fetch 1 logical block */
2988 if (ndob) {
2989 memset(fake_storep + lba_off, 0, sdebug_sector_size);
2990 ret = 0;
2991 } else
2992 ret = fetch_to_dev_buffer(scp, fake_storep + lba_off,
2993 sdebug_sector_size);
2994
2995 if (-1 == ret) {
2996 write_unlock_irqrestore(&atomic_rw, iflags);
2997 return DID_ERROR << 16;
2998 } else if (sdebug_verbose && (ret < (num * sdebug_sector_size)))
2999 sdev_printk(KERN_INFO, scp->device,
3000 "%s: %s: cdb indicated=%u, IO sent=%d bytes\n",
3001 my_name, "write same",
3002 num * sdebug_sector_size, ret);
3003
3004 /* Copy first sector to remaining blocks */
3005 for (i = 1 ; i < num ; i++)
3006 memcpy(fake_storep + ((lba + i) * sdebug_sector_size),
3007 fake_storep + lba_off,
3008 sdebug_sector_size);
3009
3010 if (scsi_debug_lbp())
3011 map_region(lba, num);
3012 out:
3013 write_unlock_irqrestore(&atomic_rw, iflags);
3014
3015 return 0;
3016 }
3017
3018 static int resp_write_same_10(struct scsi_cmnd *scp,
3019 struct sdebug_dev_info *devip)
3020 {
3021 u8 *cmd = scp->cmnd;
3022 u32 lba;
3023 u16 num;
3024 u32 ei_lba = 0;
3025 bool unmap = false;
3026
3027 if (cmd[1] & 0x8) {
3028 if (sdebug_lbpws10 == 0) {
3029 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 3);
3030 return check_condition_result;
3031 } else
3032 unmap = true;
3033 }
3034 lba = get_unaligned_be32(cmd + 2);
3035 num = get_unaligned_be16(cmd + 7);
3036 if (num > sdebug_write_same_length) {
3037 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 7, -1);
3038 return check_condition_result;
3039 }
3040 return resp_write_same(scp, lba, num, ei_lba, unmap, false);
3041 }
3042
3043 static int resp_write_same_16(struct scsi_cmnd *scp,
3044 struct sdebug_dev_info *devip)
3045 {
3046 u8 *cmd = scp->cmnd;
3047 u64 lba;
3048 u32 num;
3049 u32 ei_lba = 0;
3050 bool unmap = false;
3051 bool ndob = false;
3052
3053 if (cmd[1] & 0x8) { /* UNMAP */
3054 if (sdebug_lbpws == 0) {
3055 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 3);
3056 return check_condition_result;
3057 } else
3058 unmap = true;
3059 }
3060 if (cmd[1] & 0x1) /* NDOB (no data-out buffer, assumes zeroes) */
3061 ndob = true;
3062 lba = get_unaligned_be64(cmd + 2);
3063 num = get_unaligned_be32(cmd + 10);
3064 if (num > sdebug_write_same_length) {
3065 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 10, -1);
3066 return check_condition_result;
3067 }
3068 return resp_write_same(scp, lba, num, ei_lba, unmap, ndob);
3069 }
3070
3071 /* Note the mode field is in the same position as the (lower) service action
3072 * field. For the Report supported operation codes command, SPC-4 suggests
3073 * each mode of this command should be reported separately; for future. */
3074 static int resp_write_buffer(struct scsi_cmnd *scp,
3075 struct sdebug_dev_info *devip)
3076 {
3077 u8 *cmd = scp->cmnd;
3078 struct scsi_device *sdp = scp->device;
3079 struct sdebug_dev_info *dp;
3080 u8 mode;
3081
3082 mode = cmd[1] & 0x1f;
3083 switch (mode) {
3084 case 0x4: /* download microcode (MC) and activate (ACT) */
3085 /* set UAs on this device only */
3086 set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm);
3087 set_bit(SDEBUG_UA_MICROCODE_CHANGED, devip->uas_bm);
3088 break;
3089 case 0x5: /* download MC, save and ACT */
3090 set_bit(SDEBUG_UA_MICROCODE_CHANGED_WO_RESET, devip->uas_bm);
3091 break;
3092 case 0x6: /* download MC with offsets and ACT */
3093 /* set UAs on most devices (LUs) in this target */
3094 list_for_each_entry(dp,
3095 &devip->sdbg_host->dev_info_list,
3096 dev_list)
3097 if (dp->target == sdp->id) {
3098 set_bit(SDEBUG_UA_BUS_RESET, dp->uas_bm);
3099 if (devip != dp)
3100 set_bit(SDEBUG_UA_MICROCODE_CHANGED,
3101 dp->uas_bm);
3102 }
3103 break;
3104 case 0x7: /* download MC with offsets, save, and ACT */
3105 /* set UA on all devices (LUs) in this target */
3106 list_for_each_entry(dp,
3107 &devip->sdbg_host->dev_info_list,
3108 dev_list)
3109 if (dp->target == sdp->id)
3110 set_bit(SDEBUG_UA_MICROCODE_CHANGED_WO_RESET,
3111 dp->uas_bm);
3112 break;
3113 default:
3114 /* do nothing for this command for other mode values */
3115 break;
3116 }
3117 return 0;
3118 }
3119
3120 static int resp_comp_write(struct scsi_cmnd *scp,
3121 struct sdebug_dev_info *devip)
3122 {
3123 u8 *cmd = scp->cmnd;
3124 u8 *arr;
3125 u8 *fake_storep_hold;
3126 u64 lba;
3127 u32 dnum;
3128 u32 lb_size = sdebug_sector_size;
3129 u8 num;
3130 unsigned long iflags;
3131 int ret;
3132 int retval = 0;
3133
3134 lba = get_unaligned_be64(cmd + 2);
3135 num = cmd[13]; /* 1 to a maximum of 255 logical blocks */
3136 if (0 == num)
3137 return 0; /* degenerate case, not an error */
3138 if (sdebug_dif == SD_DIF_TYPE2_PROTECTION &&
3139 (cmd[1] & 0xe0)) {
3140 mk_sense_invalid_opcode(scp);
3141 return check_condition_result;
3142 }
3143 if ((sdebug_dif == SD_DIF_TYPE1_PROTECTION ||
3144 sdebug_dif == SD_DIF_TYPE3_PROTECTION) &&
3145 (cmd[1] & 0xe0) == 0)
3146 sdev_printk(KERN_ERR, scp->device, "Unprotected WR "
3147 "to DIF device\n");
3148
3149 /* inline check_device_access_params() */
3150 if (lba + num > sdebug_capacity) {
3151 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
3152 return check_condition_result;
3153 }
3154 /* transfer length excessive (tie in to block limits VPD page) */
3155 if (num > sdebug_store_sectors) {
3156 /* needs work to find which cdb byte 'num' comes from */
3157 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
3158 return check_condition_result;
3159 }
3160 dnum = 2 * num;
3161 arr = kzalloc(dnum * lb_size, GFP_ATOMIC);
3162 if (NULL == arr) {
3163 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
3164 INSUFF_RES_ASCQ);
3165 return check_condition_result;
3166 }
3167
3168 write_lock_irqsave(&atomic_rw, iflags);
3169
3170 /* trick do_device_access() to fetch both compare and write buffers
3171 * from data-in into arr. Safe (atomic) since write_lock held. */
3172 fake_storep_hold = fake_storep;
3173 fake_storep = arr;
3174 ret = do_device_access(scp, 0, dnum, true);
3175 fake_storep = fake_storep_hold;
3176 if (ret == -1) {
3177 retval = DID_ERROR << 16;
3178 goto cleanup;
3179 } else if (sdebug_verbose && (ret < (dnum * lb_size)))
3180 sdev_printk(KERN_INFO, scp->device, "%s: compare_write: cdb "
3181 "indicated=%u, IO sent=%d bytes\n", my_name,
3182 dnum * lb_size, ret);
3183 if (!comp_write_worker(lba, num, arr)) {
3184 mk_sense_buffer(scp, MISCOMPARE, MISCOMPARE_VERIFY_ASC, 0);
3185 retval = check_condition_result;
3186 goto cleanup;
3187 }
3188 if (scsi_debug_lbp())
3189 map_region(lba, num);
3190 cleanup:
3191 write_unlock_irqrestore(&atomic_rw, iflags);
3192 kfree(arr);
3193 return retval;
3194 }
3195
3196 struct unmap_block_desc {
3197 __be64 lba;
3198 __be32 blocks;
3199 __be32 __reserved;
3200 };
3201
3202 static int resp_unmap(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
3203 {
3204 unsigned char *buf;
3205 struct unmap_block_desc *desc;
3206 unsigned int i, payload_len, descriptors;
3207 int ret;
3208 unsigned long iflags;
3209
3210
3211 if (!scsi_debug_lbp())
3212 return 0; /* fib and say its done */
3213 payload_len = get_unaligned_be16(scp->cmnd + 7);
3214 BUG_ON(scsi_bufflen(scp) != payload_len);
3215
3216 descriptors = (payload_len - 8) / 16;
3217 if (descriptors > sdebug_unmap_max_desc) {
3218 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 7, -1);
3219 return check_condition_result;
3220 }
3221
3222 buf = kzalloc(scsi_bufflen(scp), GFP_ATOMIC);
3223 if (!buf) {
3224 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
3225 INSUFF_RES_ASCQ);
3226 return check_condition_result;
3227 }
3228
3229 scsi_sg_copy_to_buffer(scp, buf, scsi_bufflen(scp));
3230
3231 BUG_ON(get_unaligned_be16(&buf[0]) != payload_len - 2);
3232 BUG_ON(get_unaligned_be16(&buf[2]) != descriptors * 16);
3233
3234 desc = (void *)&buf[8];
3235
3236 write_lock_irqsave(&atomic_rw, iflags);
3237
3238 for (i = 0 ; i < descriptors ; i++) {
3239 unsigned long long lba = get_unaligned_be64(&desc[i].lba);
3240 unsigned int num = get_unaligned_be32(&desc[i].blocks);
3241
3242 ret = check_device_access_params(scp, lba, num);
3243 if (ret)
3244 goto out;
3245
3246 unmap_region(lba, num);
3247 }
3248
3249 ret = 0;
3250
3251 out:
3252 write_unlock_irqrestore(&atomic_rw, iflags);
3253 kfree(buf);
3254
3255 return ret;
3256 }
3257
3258 #define SDEBUG_GET_LBA_STATUS_LEN 32
3259
3260 static int resp_get_lba_status(struct scsi_cmnd *scp,
3261 struct sdebug_dev_info *devip)
3262 {
3263 u8 *cmd = scp->cmnd;
3264 u64 lba;
3265 u32 alloc_len, mapped, num;
3266 u8 arr[SDEBUG_GET_LBA_STATUS_LEN];
3267 int ret;
3268
3269 lba = get_unaligned_be64(cmd + 2);
3270 alloc_len = get_unaligned_be32(cmd + 10);
3271
3272 if (alloc_len < 24)
3273 return 0;
3274
3275 ret = check_device_access_params(scp, lba, 1);
3276 if (ret)
3277 return ret;
3278
3279 if (scsi_debug_lbp())
3280 mapped = map_state(lba, &num);
3281 else {
3282 mapped = 1;
3283 /* following just in case virtual_gb changed */
3284 sdebug_capacity = get_sdebug_capacity();
3285 if (sdebug_capacity - lba <= 0xffffffff)
3286 num = sdebug_capacity - lba;
3287 else
3288 num = 0xffffffff;
3289 }
3290
3291 memset(arr, 0, SDEBUG_GET_LBA_STATUS_LEN);
3292 put_unaligned_be32(20, arr); /* Parameter Data Length */
3293 put_unaligned_be64(lba, arr + 8); /* LBA */
3294 put_unaligned_be32(num, arr + 16); /* Number of blocks */
3295 arr[20] = !mapped; /* prov_stat=0: mapped; 1: dealloc */
3296
3297 return fill_from_dev_buffer(scp, arr, SDEBUG_GET_LBA_STATUS_LEN);
3298 }
3299
3300 #define RL_BUCKET_ELEMS 8
3301
3302 /* Even though each pseudo target has a REPORT LUNS "well known logical unit"
3303 * (W-LUN), the normal Linux scanning logic does not associate it with a
3304 * device (e.g. /dev/sg7). The following magic will make that association:
3305 * "cd /sys/class/scsi_host/host<n> ; echo '- - 49409' > scan"
3306 * where <n> is a host number. If there are multiple targets in a host then
3307 * the above will associate a W-LUN to each target. To only get a W-LUN
3308 * for target 2, then use "echo '- 2 49409' > scan" .
3309 */
3310 static int resp_report_luns(struct scsi_cmnd *scp,
3311 struct sdebug_dev_info *devip)
3312 {
3313 unsigned char *cmd = scp->cmnd;
3314 unsigned int alloc_len;
3315 unsigned char select_report;
3316 u64 lun;
3317 struct scsi_lun *lun_p;
3318 u8 arr[RL_BUCKET_ELEMS * sizeof(struct scsi_lun)];
3319 unsigned int lun_cnt; /* normal LUN count (max: 256) */
3320 unsigned int wlun_cnt; /* report luns W-LUN count */
3321 unsigned int tlun_cnt; /* total LUN count */
3322 unsigned int rlen; /* response length (in bytes) */
3323 int k, j, n, res;
3324 unsigned int off_rsp = 0;
3325 const int sz_lun = sizeof(struct scsi_lun);
3326
3327 clear_luns_changed_on_target(devip);
3328
3329 select_report = cmd[2];
3330 alloc_len = get_unaligned_be32(cmd + 6);
3331
3332 if (alloc_len < 4) {
3333 pr_err("alloc len too small %d\n", alloc_len);
3334 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 6, -1);
3335 return check_condition_result;
3336 }
3337
3338 switch (select_report) {
3339 case 0: /* all LUNs apart from W-LUNs */
3340 lun_cnt = sdebug_max_luns;
3341 wlun_cnt = 0;
3342 break;
3343 case 1: /* only W-LUNs */
3344 lun_cnt = 0;
3345 wlun_cnt = 1;
3346 break;
3347 case 2: /* all LUNs */
3348 lun_cnt = sdebug_max_luns;
3349 wlun_cnt = 1;
3350 break;
3351 case 0x10: /* only administrative LUs */
3352 case 0x11: /* see SPC-5 */
3353 case 0x12: /* only subsiduary LUs owned by referenced LU */
3354 default:
3355 pr_debug("select report invalid %d\n", select_report);
3356 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, -1);
3357 return check_condition_result;
3358 }
3359
3360 if (sdebug_no_lun_0 && (lun_cnt > 0))
3361 --lun_cnt;
3362
3363 tlun_cnt = lun_cnt + wlun_cnt;
3364 rlen = tlun_cnt * sz_lun; /* excluding 8 byte header */
3365 scsi_set_resid(scp, scsi_bufflen(scp));
3366 pr_debug("select_report %d luns = %d wluns = %d no_lun0 %d\n",
3367 select_report, lun_cnt, wlun_cnt, sdebug_no_lun_0);
3368
3369 /* loops rely on sizeof response header same as sizeof lun (both 8) */
3370 lun = sdebug_no_lun_0 ? 1 : 0;
3371 for (k = 0, j = 0, res = 0; true; ++k, j = 0) {
3372 memset(arr, 0, sizeof(arr));
3373 lun_p = (struct scsi_lun *)&arr[0];
3374 if (k == 0) {
3375 put_unaligned_be32(rlen, &arr[0]);
3376 ++lun_p;
3377 j = 1;
3378 }
3379 for ( ; j < RL_BUCKET_ELEMS; ++j, ++lun_p) {
3380 if ((k * RL_BUCKET_ELEMS) + j > lun_cnt)
3381 break;
3382 int_to_scsilun(lun++, lun_p);
3383 }
3384 if (j < RL_BUCKET_ELEMS)
3385 break;
3386 n = j * sz_lun;
3387 res = p_fill_from_dev_buffer(scp, arr, n, off_rsp);
3388 if (res)
3389 return res;
3390 off_rsp += n;
3391 }
3392 if (wlun_cnt) {
3393 int_to_scsilun(SCSI_W_LUN_REPORT_LUNS, lun_p);
3394 ++j;
3395 }
3396 if (j > 0)
3397 res = p_fill_from_dev_buffer(scp, arr, j * sz_lun, off_rsp);
3398 return res;
3399 }
3400
3401 static int resp_xdwriteread(struct scsi_cmnd *scp, unsigned long long lba,
3402 unsigned int num, struct sdebug_dev_info *devip)
3403 {
3404 int j;
3405 unsigned char *kaddr, *buf;
3406 unsigned int offset;
3407 struct scsi_data_buffer *sdb = scsi_in(scp);
3408 struct sg_mapping_iter miter;
3409
3410 /* better not to use temporary buffer. */
3411 buf = kzalloc(scsi_bufflen(scp), GFP_ATOMIC);
3412 if (!buf) {
3413 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
3414 INSUFF_RES_ASCQ);
3415 return check_condition_result;
3416 }
3417
3418 scsi_sg_copy_to_buffer(scp, buf, scsi_bufflen(scp));
3419
3420 offset = 0;
3421 sg_miter_start(&miter, sdb->table.sgl, sdb->table.nents,
3422 SG_MITER_ATOMIC | SG_MITER_TO_SG);
3423
3424 while (sg_miter_next(&miter)) {
3425 kaddr = miter.addr;
3426 for (j = 0; j < miter.length; j++)
3427 *(kaddr + j) ^= *(buf + offset + j);
3428
3429 offset += miter.length;
3430 }
3431 sg_miter_stop(&miter);
3432 kfree(buf);
3433
3434 return 0;
3435 }
3436
3437 static int resp_xdwriteread_10(struct scsi_cmnd *scp,
3438 struct sdebug_dev_info *devip)
3439 {
3440 u8 *cmd = scp->cmnd;
3441 u64 lba;
3442 u32 num;
3443 int errsts;
3444
3445 if (!scsi_bidi_cmnd(scp)) {
3446 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
3447 INSUFF_RES_ASCQ);
3448 return check_condition_result;
3449 }
3450 errsts = resp_read_dt0(scp, devip);
3451 if (errsts)
3452 return errsts;
3453 if (!(cmd[1] & 0x4)) { /* DISABLE_WRITE is not set */
3454 errsts = resp_write_dt0(scp, devip);
3455 if (errsts)
3456 return errsts;
3457 }
3458 lba = get_unaligned_be32(cmd + 2);
3459 num = get_unaligned_be16(cmd + 7);
3460 return resp_xdwriteread(scp, lba, num, devip);
3461 }
3462
3463 static struct sdebug_queue *get_queue(struct scsi_cmnd *cmnd)
3464 {
3465 struct sdebug_queue *sqp = sdebug_q_arr;
3466
3467 if (sdebug_mq_active) {
3468 u32 tag = blk_mq_unique_tag(cmnd->request);
3469 u16 hwq = blk_mq_unique_tag_to_hwq(tag);
3470
3471 if (unlikely(hwq >= submit_queues)) {
3472 pr_warn("Unexpected hwq=%d, apply modulo\n", hwq);
3473 hwq %= submit_queues;
3474 }
3475 pr_debug("tag=%u, hwq=%d\n", tag, hwq);
3476 return sqp + hwq;
3477 } else
3478 return sqp;
3479 }
3480
3481 /* Queued (deferred) command completions converge here. */
3482 static void sdebug_q_cmd_complete(struct sdebug_defer *sd_dp)
3483 {
3484 int qc_idx;
3485 int retiring = 0;
3486 unsigned long iflags;
3487 struct sdebug_queue *sqp;
3488 struct sdebug_queued_cmd *sqcp;
3489 struct scsi_cmnd *scp;
3490 struct sdebug_dev_info *devip;
3491
3492 qc_idx = sd_dp->qc_idx;
3493 sqp = sdebug_q_arr + sd_dp->sqa_idx;
3494 if (sdebug_statistics) {
3495 atomic_inc(&sdebug_completions);
3496 if (raw_smp_processor_id() != sd_dp->issuing_cpu)
3497 atomic_inc(&sdebug_miss_cpus);
3498 }
3499 if (unlikely((qc_idx < 0) || (qc_idx >= SDEBUG_CANQUEUE))) {
3500 pr_err("wild qc_idx=%d\n", qc_idx);
3501 return;
3502 }
3503 spin_lock_irqsave(&sqp->qc_lock, iflags);
3504 sqcp = &sqp->qc_arr[qc_idx];
3505 scp = sqcp->a_cmnd;
3506 if (unlikely(scp == NULL)) {
3507 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
3508 pr_err("scp is NULL, sqa_idx=%d, qc_idx=%d\n",
3509 sd_dp->sqa_idx, qc_idx);
3510 return;
3511 }
3512 devip = (struct sdebug_dev_info *)scp->device->hostdata;
3513 if (likely(devip))
3514 atomic_dec(&devip->num_in_q);
3515 else
3516 pr_err("devip=NULL\n");
3517 if (unlikely(atomic_read(&retired_max_queue) > 0))
3518 retiring = 1;
3519
3520 sqcp->a_cmnd = NULL;
3521 if (unlikely(!test_and_clear_bit(qc_idx, sqp->in_use_bm))) {
3522 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
3523 pr_err("Unexpected completion\n");
3524 return;
3525 }
3526
3527 if (unlikely(retiring)) { /* user has reduced max_queue */
3528 int k, retval;
3529
3530 retval = atomic_read(&retired_max_queue);
3531 if (qc_idx >= retval) {
3532 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
3533 pr_err("index %d too large\n", retval);
3534 return;
3535 }
3536 k = find_last_bit(sqp->in_use_bm, retval);
3537 if ((k < sdebug_max_queue) || (k == retval))
3538 atomic_set(&retired_max_queue, 0);
3539 else
3540 atomic_set(&retired_max_queue, k + 1);
3541 }
3542 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
3543 scp->scsi_done(scp); /* callback to mid level */
3544 }
3545
3546 /* When high resolution timer goes off this function is called. */
3547 static enum hrtimer_restart sdebug_q_cmd_hrt_complete(struct hrtimer *timer)
3548 {
3549 struct sdebug_defer *sd_dp = container_of(timer, struct sdebug_defer,
3550 hrt);
3551 sdebug_q_cmd_complete(sd_dp);
3552 return HRTIMER_NORESTART;
3553 }
3554
3555 /* When work queue schedules work, it calls this function. */
3556 static void sdebug_q_cmd_wq_complete(struct work_struct *work)
3557 {
3558 struct sdebug_defer *sd_dp = container_of(work, struct sdebug_defer,
3559 ew.work);
3560 sdebug_q_cmd_complete(sd_dp);
3561 }
3562
3563 static bool got_shared_uuid;
3564 static uuid_be shared_uuid;
3565
3566 static struct sdebug_dev_info *sdebug_device_create(
3567 struct sdebug_host_info *sdbg_host, gfp_t flags)
3568 {
3569 struct sdebug_dev_info *devip;
3570
3571 devip = kzalloc(sizeof(*devip), flags);
3572 if (devip) {
3573 if (sdebug_uuid_ctl == 1)
3574 uuid_be_gen(&devip->lu_name);
3575 else if (sdebug_uuid_ctl == 2) {
3576 if (got_shared_uuid)
3577 devip->lu_name = shared_uuid;
3578 else {
3579 uuid_be_gen(&shared_uuid);
3580 got_shared_uuid = true;
3581 devip->lu_name = shared_uuid;
3582 }
3583 }
3584 devip->sdbg_host = sdbg_host;
3585 list_add_tail(&devip->dev_list, &sdbg_host->dev_info_list);
3586 }
3587 return devip;
3588 }
3589
3590 static struct sdebug_dev_info *find_build_dev_info(struct scsi_device *sdev)
3591 {
3592 struct sdebug_host_info *sdbg_host;
3593 struct sdebug_dev_info *open_devip = NULL;
3594 struct sdebug_dev_info *devip;
3595
3596 sdbg_host = *(struct sdebug_host_info **)shost_priv(sdev->host);
3597 if (!sdbg_host) {
3598 pr_err("Host info NULL\n");
3599 return NULL;
3600 }
3601 list_for_each_entry(devip, &sdbg_host->dev_info_list, dev_list) {
3602 if ((devip->used) && (devip->channel == sdev->channel) &&
3603 (devip->target == sdev->id) &&
3604 (devip->lun == sdev->lun))
3605 return devip;
3606 else {
3607 if ((!devip->used) && (!open_devip))
3608 open_devip = devip;
3609 }
3610 }
3611 if (!open_devip) { /* try and make a new one */
3612 open_devip = sdebug_device_create(sdbg_host, GFP_ATOMIC);
3613 if (!open_devip) {
3614 pr_err("out of memory at line %d\n", __LINE__);
3615 return NULL;
3616 }
3617 }
3618
3619 open_devip->channel = sdev->channel;
3620 open_devip->target = sdev->id;
3621 open_devip->lun = sdev->lun;
3622 open_devip->sdbg_host = sdbg_host;
3623 atomic_set(&open_devip->num_in_q, 0);
3624 set_bit(SDEBUG_UA_POR, open_devip->uas_bm);
3625 open_devip->used = true;
3626 return open_devip;
3627 }
3628
3629 static int scsi_debug_slave_alloc(struct scsi_device *sdp)
3630 {
3631 if (sdebug_verbose)
3632 pr_info("slave_alloc <%u %u %u %llu>\n",
3633 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
3634 queue_flag_set_unlocked(QUEUE_FLAG_BIDI, sdp->request_queue);
3635 return 0;
3636 }
3637
3638 static int scsi_debug_slave_configure(struct scsi_device *sdp)
3639 {
3640 struct sdebug_dev_info *devip =
3641 (struct sdebug_dev_info *)sdp->hostdata;
3642
3643 if (sdebug_verbose)
3644 pr_info("slave_configure <%u %u %u %llu>\n",
3645 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
3646 if (sdp->host->max_cmd_len != SDEBUG_MAX_CMD_LEN)
3647 sdp->host->max_cmd_len = SDEBUG_MAX_CMD_LEN;
3648 if (devip == NULL) {
3649 devip = find_build_dev_info(sdp);
3650 if (devip == NULL)
3651 return 1; /* no resources, will be marked offline */
3652 }
3653 sdp->hostdata = devip;
3654 blk_queue_max_segment_size(sdp->request_queue, -1U);
3655 if (sdebug_no_uld)
3656 sdp->no_uld_attach = 1;
3657 return 0;
3658 }
3659
3660 static void scsi_debug_slave_destroy(struct scsi_device *sdp)
3661 {
3662 struct sdebug_dev_info *devip =
3663 (struct sdebug_dev_info *)sdp->hostdata;
3664
3665 if (sdebug_verbose)
3666 pr_info("slave_destroy <%u %u %u %llu>\n",
3667 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
3668 if (devip) {
3669 /* make this slot available for re-use */
3670 devip->used = false;
3671 sdp->hostdata = NULL;
3672 }
3673 }
3674
3675 static void stop_qc_helper(struct sdebug_defer *sd_dp)
3676 {
3677 if (!sd_dp)
3678 return;
3679 if ((sdebug_jdelay > 0) || (sdebug_ndelay > 0))
3680 hrtimer_cancel(&sd_dp->hrt);
3681 else if (sdebug_jdelay < 0)
3682 cancel_work_sync(&sd_dp->ew.work);
3683 }
3684
3685 /* If @cmnd found deletes its timer or work queue and returns true; else
3686 returns false */
3687 static bool stop_queued_cmnd(struct scsi_cmnd *cmnd)
3688 {
3689 unsigned long iflags;
3690 int j, k, qmax, r_qmax;
3691 struct sdebug_queue *sqp;
3692 struct sdebug_queued_cmd *sqcp;
3693 struct sdebug_dev_info *devip;
3694 struct sdebug_defer *sd_dp;
3695
3696 for (j = 0, sqp = sdebug_q_arr; j < submit_queues; ++j, ++sqp) {
3697 spin_lock_irqsave(&sqp->qc_lock, iflags);
3698 qmax = sdebug_max_queue;
3699 r_qmax = atomic_read(&retired_max_queue);
3700 if (r_qmax > qmax)
3701 qmax = r_qmax;
3702 for (k = 0; k < qmax; ++k) {
3703 if (test_bit(k, sqp->in_use_bm)) {
3704 sqcp = &sqp->qc_arr[k];
3705 if (cmnd != sqcp->a_cmnd)
3706 continue;
3707 /* found */
3708 devip = (struct sdebug_dev_info *)
3709 cmnd->device->hostdata;
3710 if (devip)
3711 atomic_dec(&devip->num_in_q);
3712 sqcp->a_cmnd = NULL;
3713 sd_dp = sqcp->sd_dp;
3714 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
3715 stop_qc_helper(sd_dp);
3716 clear_bit(k, sqp->in_use_bm);
3717 return true;
3718 }
3719 }
3720 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
3721 }
3722 return false;
3723 }
3724
3725 /* Deletes (stops) timers or work queues of all queued commands */
3726 static void stop_all_queued(void)
3727 {
3728 unsigned long iflags;
3729 int j, k;
3730 struct sdebug_queue *sqp;
3731 struct sdebug_queued_cmd *sqcp;
3732 struct sdebug_dev_info *devip;
3733 struct sdebug_defer *sd_dp;
3734
3735 for (j = 0, sqp = sdebug_q_arr; j < submit_queues; ++j, ++sqp) {
3736 spin_lock_irqsave(&sqp->qc_lock, iflags);
3737 for (k = 0; k < SDEBUG_CANQUEUE; ++k) {
3738 if (test_bit(k, sqp->in_use_bm)) {
3739 sqcp = &sqp->qc_arr[k];
3740 if (sqcp->a_cmnd == NULL)
3741 continue;
3742 devip = (struct sdebug_dev_info *)
3743 sqcp->a_cmnd->device->hostdata;
3744 if (devip)
3745 atomic_dec(&devip->num_in_q);
3746 sqcp->a_cmnd = NULL;
3747 sd_dp = sqcp->sd_dp;
3748 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
3749 stop_qc_helper(sd_dp);
3750 clear_bit(k, sqp->in_use_bm);
3751 spin_lock_irqsave(&sqp->qc_lock, iflags);
3752 }
3753 }
3754 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
3755 }
3756 }
3757
3758 /* Free queued command memory on heap */
3759 static void free_all_queued(void)
3760 {
3761 int j, k;
3762 struct sdebug_queue *sqp;
3763 struct sdebug_queued_cmd *sqcp;
3764
3765 for (j = 0, sqp = sdebug_q_arr; j < submit_queues; ++j, ++sqp) {
3766 for (k = 0; k < SDEBUG_CANQUEUE; ++k) {
3767 sqcp = &sqp->qc_arr[k];
3768 kfree(sqcp->sd_dp);
3769 sqcp->sd_dp = NULL;
3770 }
3771 }
3772 }
3773
3774 static int scsi_debug_abort(struct scsi_cmnd *SCpnt)
3775 {
3776 bool ok;
3777
3778 ++num_aborts;
3779 if (SCpnt) {
3780 ok = stop_queued_cmnd(SCpnt);
3781 if (SCpnt->device && (SDEBUG_OPT_ALL_NOISE & sdebug_opts))
3782 sdev_printk(KERN_INFO, SCpnt->device,
3783 "%s: command%s found\n", __func__,
3784 ok ? "" : " not");
3785 }
3786 return SUCCESS;
3787 }
3788
3789 static int scsi_debug_device_reset(struct scsi_cmnd * SCpnt)
3790 {
3791 ++num_dev_resets;
3792 if (SCpnt && SCpnt->device) {
3793 struct scsi_device *sdp = SCpnt->device;
3794 struct sdebug_dev_info *devip =
3795 (struct sdebug_dev_info *)sdp->hostdata;
3796
3797 if (SDEBUG_OPT_ALL_NOISE & sdebug_opts)
3798 sdev_printk(KERN_INFO, sdp, "%s\n", __func__);
3799 if (devip)
3800 set_bit(SDEBUG_UA_POR, devip->uas_bm);
3801 }
3802 return SUCCESS;
3803 }
3804
3805 static int scsi_debug_target_reset(struct scsi_cmnd *SCpnt)
3806 {
3807 struct sdebug_host_info *sdbg_host;
3808 struct sdebug_dev_info *devip;
3809 struct scsi_device *sdp;
3810 struct Scsi_Host *hp;
3811 int k = 0;
3812
3813 ++num_target_resets;
3814 if (!SCpnt)
3815 goto lie;
3816 sdp = SCpnt->device;
3817 if (!sdp)
3818 goto lie;
3819 if (SDEBUG_OPT_ALL_NOISE & sdebug_opts)
3820 sdev_printk(KERN_INFO, sdp, "%s\n", __func__);
3821 hp = sdp->host;
3822 if (!hp)
3823 goto lie;
3824 sdbg_host = *(struct sdebug_host_info **)shost_priv(hp);
3825 if (sdbg_host) {
3826 list_for_each_entry(devip,
3827 &sdbg_host->dev_info_list,
3828 dev_list)
3829 if (devip->target == sdp->id) {
3830 set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm);
3831 ++k;
3832 }
3833 }
3834 if (SDEBUG_OPT_RESET_NOISE & sdebug_opts)
3835 sdev_printk(KERN_INFO, sdp,
3836 "%s: %d device(s) found in target\n", __func__, k);
3837 lie:
3838 return SUCCESS;
3839 }
3840
3841 static int scsi_debug_bus_reset(struct scsi_cmnd * SCpnt)
3842 {
3843 struct sdebug_host_info *sdbg_host;
3844 struct sdebug_dev_info *devip;
3845 struct scsi_device * sdp;
3846 struct Scsi_Host * hp;
3847 int k = 0;
3848
3849 ++num_bus_resets;
3850 if (!(SCpnt && SCpnt->device))
3851 goto lie;
3852 sdp = SCpnt->device;
3853 if (SDEBUG_OPT_ALL_NOISE & sdebug_opts)
3854 sdev_printk(KERN_INFO, sdp, "%s\n", __func__);
3855 hp = sdp->host;
3856 if (hp) {
3857 sdbg_host = *(struct sdebug_host_info **)shost_priv(hp);
3858 if (sdbg_host) {
3859 list_for_each_entry(devip,
3860 &sdbg_host->dev_info_list,
3861 dev_list) {
3862 set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm);
3863 ++k;
3864 }
3865 }
3866 }
3867 if (SDEBUG_OPT_RESET_NOISE & sdebug_opts)
3868 sdev_printk(KERN_INFO, sdp,
3869 "%s: %d device(s) found in host\n", __func__, k);
3870 lie:
3871 return SUCCESS;
3872 }
3873
3874 static int scsi_debug_host_reset(struct scsi_cmnd * SCpnt)
3875 {
3876 struct sdebug_host_info * sdbg_host;
3877 struct sdebug_dev_info *devip;
3878 int k = 0;
3879
3880 ++num_host_resets;
3881 if ((SCpnt->device) && (SDEBUG_OPT_ALL_NOISE & sdebug_opts))
3882 sdev_printk(KERN_INFO, SCpnt->device, "%s\n", __func__);
3883 spin_lock(&sdebug_host_list_lock);
3884 list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) {
3885 list_for_each_entry(devip, &sdbg_host->dev_info_list,
3886 dev_list) {
3887 set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm);
3888 ++k;
3889 }
3890 }
3891 spin_unlock(&sdebug_host_list_lock);
3892 stop_all_queued();
3893 if (SDEBUG_OPT_RESET_NOISE & sdebug_opts)
3894 sdev_printk(KERN_INFO, SCpnt->device,
3895 "%s: %d device(s) found\n", __func__, k);
3896 return SUCCESS;
3897 }
3898
3899 static void __init sdebug_build_parts(unsigned char *ramp,
3900 unsigned long store_size)
3901 {
3902 struct partition * pp;
3903 int starts[SDEBUG_MAX_PARTS + 2];
3904 int sectors_per_part, num_sectors, k;
3905 int heads_by_sects, start_sec, end_sec;
3906
3907 /* assume partition table already zeroed */
3908 if ((sdebug_num_parts < 1) || (store_size < 1048576))
3909 return;
3910 if (sdebug_num_parts > SDEBUG_MAX_PARTS) {
3911 sdebug_num_parts = SDEBUG_MAX_PARTS;
3912 pr_warn("reducing partitions to %d\n", SDEBUG_MAX_PARTS);
3913 }
3914 num_sectors = (int)sdebug_store_sectors;
3915 sectors_per_part = (num_sectors - sdebug_sectors_per)
3916 / sdebug_num_parts;
3917 heads_by_sects = sdebug_heads * sdebug_sectors_per;
3918 starts[0] = sdebug_sectors_per;
3919 for (k = 1; k < sdebug_num_parts; ++k)
3920 starts[k] = ((k * sectors_per_part) / heads_by_sects)
3921 * heads_by_sects;
3922 starts[sdebug_num_parts] = num_sectors;
3923 starts[sdebug_num_parts + 1] = 0;
3924
3925 ramp[510] = 0x55; /* magic partition markings */
3926 ramp[511] = 0xAA;
3927 pp = (struct partition *)(ramp + 0x1be);
3928 for (k = 0; starts[k + 1]; ++k, ++pp) {
3929 start_sec = starts[k];
3930 end_sec = starts[k + 1] - 1;
3931 pp->boot_ind = 0;
3932
3933 pp->cyl = start_sec / heads_by_sects;
3934 pp->head = (start_sec - (pp->cyl * heads_by_sects))
3935 / sdebug_sectors_per;
3936 pp->sector = (start_sec % sdebug_sectors_per) + 1;
3937
3938 pp->end_cyl = end_sec / heads_by_sects;
3939 pp->end_head = (end_sec - (pp->end_cyl * heads_by_sects))
3940 / sdebug_sectors_per;
3941 pp->end_sector = (end_sec % sdebug_sectors_per) + 1;
3942
3943 pp->start_sect = cpu_to_le32(start_sec);
3944 pp->nr_sects = cpu_to_le32(end_sec - start_sec + 1);
3945 pp->sys_ind = 0x83; /* plain Linux partition */
3946 }
3947 }
3948
3949 static void block_unblock_all_queues(bool block)
3950 {
3951 int j;
3952 struct sdebug_queue *sqp;
3953
3954 for (j = 0, sqp = sdebug_q_arr; j < submit_queues; ++j, ++sqp)
3955 atomic_set(&sqp->blocked, (int)block);
3956 }
3957
3958 /* Adjust (by rounding down) the sdebug_cmnd_count so abs(every_nth)-1
3959 * commands will be processed normally before triggers occur.
3960 */
3961 static void tweak_cmnd_count(void)
3962 {
3963 int count, modulo;
3964
3965 modulo = abs(sdebug_every_nth);
3966 if (modulo < 2)
3967 return;
3968 block_unblock_all_queues(true);
3969 count = atomic_read(&sdebug_cmnd_count);
3970 atomic_set(&sdebug_cmnd_count, (count / modulo) * modulo);
3971 block_unblock_all_queues(false);
3972 }
3973
3974 static void clear_queue_stats(void)
3975 {
3976 atomic_set(&sdebug_cmnd_count, 0);
3977 atomic_set(&sdebug_completions, 0);
3978 atomic_set(&sdebug_miss_cpus, 0);
3979 atomic_set(&sdebug_a_tsf, 0);
3980 }
3981
3982 static void setup_inject(struct sdebug_queue *sqp,
3983 struct sdebug_queued_cmd *sqcp)
3984 {
3985 if ((atomic_read(&sdebug_cmnd_count) % abs(sdebug_every_nth)) > 0)
3986 return;
3987 sqcp->inj_recovered = !!(SDEBUG_OPT_RECOVERED_ERR & sdebug_opts);
3988 sqcp->inj_transport = !!(SDEBUG_OPT_TRANSPORT_ERR & sdebug_opts);
3989 sqcp->inj_dif = !!(SDEBUG_OPT_DIF_ERR & sdebug_opts);
3990 sqcp->inj_dix = !!(SDEBUG_OPT_DIX_ERR & sdebug_opts);
3991 sqcp->inj_short = !!(SDEBUG_OPT_SHORT_TRANSFER & sdebug_opts);
3992 }
3993
3994 /* Complete the processing of the thread that queued a SCSI command to this
3995 * driver. It either completes the command by calling cmnd_done() or
3996 * schedules a hr timer or work queue then returns 0. Returns
3997 * SCSI_MLQUEUE_HOST_BUSY if temporarily out of resources.
3998 */
3999 static int schedule_resp(struct scsi_cmnd *cmnd, struct sdebug_dev_info *devip,
4000 int scsi_result, int delta_jiff)
4001 {
4002 unsigned long iflags;
4003 int k, num_in_q, qdepth, inject;
4004 struct sdebug_queue *sqp;
4005 struct sdebug_queued_cmd *sqcp;
4006 struct scsi_device *sdp;
4007 struct sdebug_defer *sd_dp;
4008
4009 if (unlikely(devip == NULL)) {
4010 if (scsi_result == 0)
4011 scsi_result = DID_NO_CONNECT << 16;
4012 goto respond_in_thread;
4013 }
4014 sdp = cmnd->device;
4015
4016 if (unlikely(sdebug_verbose && scsi_result))
4017 sdev_printk(KERN_INFO, sdp, "%s: non-zero result=0x%x\n",
4018 __func__, scsi_result);
4019 if (delta_jiff == 0)
4020 goto respond_in_thread;
4021
4022 /* schedule the response at a later time if resources permit */
4023 sqp = get_queue(cmnd);
4024 spin_lock_irqsave(&sqp->qc_lock, iflags);
4025 if (unlikely(atomic_read(&sqp->blocked))) {
4026 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
4027 return SCSI_MLQUEUE_HOST_BUSY;
4028 }
4029 num_in_q = atomic_read(&devip->num_in_q);
4030 qdepth = cmnd->device->queue_depth;
4031 inject = 0;
4032 if (unlikely((qdepth > 0) && (num_in_q >= qdepth))) {
4033 if (scsi_result) {
4034 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
4035 goto respond_in_thread;
4036 } else
4037 scsi_result = device_qfull_result;
4038 } else if (unlikely(sdebug_every_nth &&
4039 (SDEBUG_OPT_RARE_TSF & sdebug_opts) &&
4040 (scsi_result == 0))) {
4041 if ((num_in_q == (qdepth - 1)) &&
4042 (atomic_inc_return(&sdebug_a_tsf) >=
4043 abs(sdebug_every_nth))) {
4044 atomic_set(&sdebug_a_tsf, 0);
4045 inject = 1;
4046 scsi_result = device_qfull_result;
4047 }
4048 }
4049
4050 k = find_first_zero_bit(sqp->in_use_bm, sdebug_max_queue);
4051 if (unlikely(k >= sdebug_max_queue)) {
4052 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
4053 if (scsi_result)
4054 goto respond_in_thread;
4055 else if (SDEBUG_OPT_ALL_TSF & sdebug_opts)
4056 scsi_result = device_qfull_result;
4057 if (SDEBUG_OPT_Q_NOISE & sdebug_opts)
4058 sdev_printk(KERN_INFO, sdp,
4059 "%s: max_queue=%d exceeded, %s\n",
4060 __func__, sdebug_max_queue,
4061 (scsi_result ? "status: TASK SET FULL" :
4062 "report: host busy"));
4063 if (scsi_result)
4064 goto respond_in_thread;
4065 else
4066 return SCSI_MLQUEUE_HOST_BUSY;
4067 }
4068 __set_bit(k, sqp->in_use_bm);
4069 atomic_inc(&devip->num_in_q);
4070 sqcp = &sqp->qc_arr[k];
4071 sqcp->a_cmnd = cmnd;
4072 cmnd->host_scribble = (unsigned char *)sqcp;
4073 cmnd->result = scsi_result;
4074 sd_dp = sqcp->sd_dp;
4075 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
4076 if (unlikely(sdebug_every_nth && sdebug_any_injecting_opt))
4077 setup_inject(sqp, sqcp);
4078 if (delta_jiff > 0 || sdebug_ndelay > 0) {
4079 ktime_t kt;
4080
4081 if (delta_jiff > 0) {
4082 struct timespec ts;
4083
4084 jiffies_to_timespec(delta_jiff, &ts);
4085 kt = ktime_set(ts.tv_sec, ts.tv_nsec);
4086 } else
4087 kt = ktime_set(0, sdebug_ndelay);
4088 if (NULL == sd_dp) {
4089 sd_dp = kzalloc(sizeof(*sd_dp), GFP_ATOMIC);
4090 if (NULL == sd_dp)
4091 return SCSI_MLQUEUE_HOST_BUSY;
4092 sqcp->sd_dp = sd_dp;
4093 hrtimer_init(&sd_dp->hrt, CLOCK_MONOTONIC,
4094 HRTIMER_MODE_REL_PINNED);
4095 sd_dp->hrt.function = sdebug_q_cmd_hrt_complete;
4096 sd_dp->sqa_idx = sqp - sdebug_q_arr;
4097 sd_dp->qc_idx = k;
4098 }
4099 if (sdebug_statistics)
4100 sd_dp->issuing_cpu = raw_smp_processor_id();
4101 hrtimer_start(&sd_dp->hrt, kt, HRTIMER_MODE_REL_PINNED);
4102 } else { /* jdelay < 0, use work queue */
4103 if (NULL == sd_dp) {
4104 sd_dp = kzalloc(sizeof(*sqcp->sd_dp), GFP_ATOMIC);
4105 if (NULL == sd_dp)
4106 return SCSI_MLQUEUE_HOST_BUSY;
4107 sqcp->sd_dp = sd_dp;
4108 sd_dp->sqa_idx = sqp - sdebug_q_arr;
4109 sd_dp->qc_idx = k;
4110 INIT_WORK(&sd_dp->ew.work, sdebug_q_cmd_wq_complete);
4111 }
4112 if (sdebug_statistics)
4113 sd_dp->issuing_cpu = raw_smp_processor_id();
4114 schedule_work(&sd_dp->ew.work);
4115 }
4116 if (unlikely((SDEBUG_OPT_Q_NOISE & sdebug_opts) &&
4117 (scsi_result == device_qfull_result)))
4118 sdev_printk(KERN_INFO, sdp,
4119 "%s: num_in_q=%d +1, %s%s\n", __func__,
4120 num_in_q, (inject ? "<inject> " : ""),
4121 "status: TASK SET FULL");
4122 return 0;
4123
4124 respond_in_thread: /* call back to mid-layer using invocation thread */
4125 cmnd->result = scsi_result;
4126 cmnd->scsi_done(cmnd);
4127 return 0;
4128 }
4129
4130 /* Note: The following macros create attribute files in the
4131 /sys/module/scsi_debug/parameters directory. Unfortunately this
4132 driver is unaware of a change and cannot trigger auxiliary actions
4133 as it can when the corresponding attribute in the
4134 /sys/bus/pseudo/drivers/scsi_debug directory is changed.
4135 */
4136 module_param_named(add_host, sdebug_add_host, int, S_IRUGO | S_IWUSR);
4137 module_param_named(ato, sdebug_ato, int, S_IRUGO);
4138 module_param_named(clustering, sdebug_clustering, bool, S_IRUGO | S_IWUSR);
4139 module_param_named(delay, sdebug_jdelay, int, S_IRUGO | S_IWUSR);
4140 module_param_named(dev_size_mb, sdebug_dev_size_mb, int, S_IRUGO);
4141 module_param_named(dif, sdebug_dif, int, S_IRUGO);
4142 module_param_named(dix, sdebug_dix, int, S_IRUGO);
4143 module_param_named(dsense, sdebug_dsense, int, S_IRUGO | S_IWUSR);
4144 module_param_named(every_nth, sdebug_every_nth, int, S_IRUGO | S_IWUSR);
4145 module_param_named(fake_rw, sdebug_fake_rw, int, S_IRUGO | S_IWUSR);
4146 module_param_named(guard, sdebug_guard, uint, S_IRUGO);
4147 module_param_named(host_lock, sdebug_host_lock, bool, S_IRUGO | S_IWUSR);
4148 module_param_named(lbpu, sdebug_lbpu, int, S_IRUGO);
4149 module_param_named(lbpws, sdebug_lbpws, int, S_IRUGO);
4150 module_param_named(lbpws10, sdebug_lbpws10, int, S_IRUGO);
4151 module_param_named(lbprz, sdebug_lbprz, int, S_IRUGO);
4152 module_param_named(lowest_aligned, sdebug_lowest_aligned, int, S_IRUGO);
4153 module_param_named(max_luns, sdebug_max_luns, int, S_IRUGO | S_IWUSR);
4154 module_param_named(max_queue, sdebug_max_queue, int, S_IRUGO | S_IWUSR);
4155 module_param_named(ndelay, sdebug_ndelay, int, S_IRUGO | S_IWUSR);
4156 module_param_named(no_lun_0, sdebug_no_lun_0, int, S_IRUGO | S_IWUSR);
4157 module_param_named(no_uld, sdebug_no_uld, int, S_IRUGO);
4158 module_param_named(num_parts, sdebug_num_parts, int, S_IRUGO);
4159 module_param_named(num_tgts, sdebug_num_tgts, int, S_IRUGO | S_IWUSR);
4160 module_param_named(opt_blks, sdebug_opt_blks, int, S_IRUGO);
4161 module_param_named(opts, sdebug_opts, int, S_IRUGO | S_IWUSR);
4162 module_param_named(physblk_exp, sdebug_physblk_exp, int, S_IRUGO);
4163 module_param_named(ptype, sdebug_ptype, int, S_IRUGO | S_IWUSR);
4164 module_param_named(removable, sdebug_removable, bool, S_IRUGO | S_IWUSR);
4165 module_param_named(scsi_level, sdebug_scsi_level, int, S_IRUGO);
4166 module_param_named(sector_size, sdebug_sector_size, int, S_IRUGO);
4167 module_param_named(statistics, sdebug_statistics, bool, S_IRUGO | S_IWUSR);
4168 module_param_named(strict, sdebug_strict, bool, S_IRUGO | S_IWUSR);
4169 module_param_named(submit_queues, submit_queues, int, S_IRUGO);
4170 module_param_named(unmap_alignment, sdebug_unmap_alignment, int, S_IRUGO);
4171 module_param_named(unmap_granularity, sdebug_unmap_granularity, int, S_IRUGO);
4172 module_param_named(unmap_max_blocks, sdebug_unmap_max_blocks, int, S_IRUGO);
4173 module_param_named(unmap_max_desc, sdebug_unmap_max_desc, int, S_IRUGO);
4174 module_param_named(virtual_gb, sdebug_virtual_gb, int, S_IRUGO | S_IWUSR);
4175 module_param_named(uuid_ctl, sdebug_uuid_ctl, int, S_IRUGO);
4176 module_param_named(vpd_use_hostno, sdebug_vpd_use_hostno, int,
4177 S_IRUGO | S_IWUSR);
4178 module_param_named(write_same_length, sdebug_write_same_length, int,
4179 S_IRUGO | S_IWUSR);
4180
4181 MODULE_AUTHOR("Eric Youngdale + Douglas Gilbert");
4182 MODULE_DESCRIPTION("SCSI debug adapter driver");
4183 MODULE_LICENSE("GPL");
4184 MODULE_VERSION(SDEBUG_VERSION);
4185
4186 MODULE_PARM_DESC(add_host, "0..127 hosts allowed(def=1)");
4187 MODULE_PARM_DESC(ato, "application tag ownership: 0=disk 1=host (def=1)");
4188 MODULE_PARM_DESC(clustering, "when set enables larger transfers (def=0)");
4189 MODULE_PARM_DESC(delay, "response delay (def=1 jiffy); 0:imm, -1,-2:tiny");
4190 MODULE_PARM_DESC(dev_size_mb, "size in MiB of ram shared by devs(def=8)");
4191 MODULE_PARM_DESC(dif, "data integrity field type: 0-3 (def=0)");
4192 MODULE_PARM_DESC(dix, "data integrity extensions mask (def=0)");
4193 MODULE_PARM_DESC(dsense, "use descriptor sense format(def=0 -> fixed)");
4194 MODULE_PARM_DESC(every_nth, "timeout every nth command(def=0)");
4195 MODULE_PARM_DESC(fake_rw, "fake reads/writes instead of copying (def=0)");
4196 MODULE_PARM_DESC(guard, "protection checksum: 0=crc, 1=ip (def=0)");
4197 MODULE_PARM_DESC(host_lock, "host_lock is ignored (def=0)");
4198 MODULE_PARM_DESC(lbpu, "enable LBP, support UNMAP command (def=0)");
4199 MODULE_PARM_DESC(lbpws, "enable LBP, support WRITE SAME(16) with UNMAP bit (def=0)");
4200 MODULE_PARM_DESC(lbpws10, "enable LBP, support WRITE SAME(10) with UNMAP bit (def=0)");
4201 MODULE_PARM_DESC(lbprz,
4202 "on read unmapped LBs return 0 when 1 (def), return 0xff when 2");
4203 MODULE_PARM_DESC(lowest_aligned, "lowest aligned lba (def=0)");
4204 MODULE_PARM_DESC(max_luns, "number of LUNs per target to simulate(def=1)");
4205 MODULE_PARM_DESC(max_queue, "max number of queued commands (1 to max(def))");
4206 MODULE_PARM_DESC(ndelay, "response delay in nanoseconds (def=0 -> ignore)");
4207 MODULE_PARM_DESC(no_lun_0, "no LU number 0 (def=0 -> have lun 0)");
4208 MODULE_PARM_DESC(no_uld, "stop ULD (e.g. sd driver) attaching (def=0))");
4209 MODULE_PARM_DESC(num_parts, "number of partitions(def=0)");
4210 MODULE_PARM_DESC(num_tgts, "number of targets per host to simulate(def=1)");
4211 MODULE_PARM_DESC(opt_blks, "optimal transfer length in blocks (def=1024)");
4212 MODULE_PARM_DESC(opts, "1->noise, 2->medium_err, 4->timeout, 8->recovered_err... (def=0)");
4213 MODULE_PARM_DESC(physblk_exp, "physical block exponent (def=0)");
4214 MODULE_PARM_DESC(ptype, "SCSI peripheral type(def=0[disk])");
4215 MODULE_PARM_DESC(removable, "claim to have removable media (def=0)");
4216 MODULE_PARM_DESC(scsi_level, "SCSI level to simulate(def=7[SPC-5])");
4217 MODULE_PARM_DESC(sector_size, "logical block size in bytes (def=512)");
4218 MODULE_PARM_DESC(statistics, "collect statistics on commands, queues (def=0)");
4219 MODULE_PARM_DESC(strict, "stricter checks: reserved field in cdb (def=0)");
4220 MODULE_PARM_DESC(submit_queues, "support for block multi-queue (def=1)");
4221 MODULE_PARM_DESC(unmap_alignment, "lowest aligned thin provisioning lba (def=0)");
4222 MODULE_PARM_DESC(unmap_granularity, "thin provisioning granularity in blocks (def=1)");
4223 MODULE_PARM_DESC(unmap_max_blocks, "max # of blocks can be unmapped in one cmd (def=0xffffffff)");
4224 MODULE_PARM_DESC(unmap_max_desc, "max # of ranges that can be unmapped in one cmd (def=256)");
4225 MODULE_PARM_DESC(uuid_ctl,
4226 "1->use uuid for lu name, 0->don't, 2->all use same (def=0)");
4227 MODULE_PARM_DESC(virtual_gb, "virtual gigabyte (GiB) size (def=0 -> use dev_size_mb)");
4228 MODULE_PARM_DESC(vpd_use_hostno, "0 -> dev ids ignore hostno (def=1 -> unique dev ids)");
4229 MODULE_PARM_DESC(write_same_length, "Maximum blocks per WRITE SAME cmd (def=0xffff)");
4230
4231 #define SDEBUG_INFO_LEN 256
4232 static char sdebug_info[SDEBUG_INFO_LEN];
4233
4234 static const char * scsi_debug_info(struct Scsi_Host * shp)
4235 {
4236 int k;
4237
4238 k = scnprintf(sdebug_info, SDEBUG_INFO_LEN, "%s: version %s [%s]\n",
4239 my_name, SDEBUG_VERSION, sdebug_version_date);
4240 if (k >= (SDEBUG_INFO_LEN - 1))
4241 return sdebug_info;
4242 scnprintf(sdebug_info + k, SDEBUG_INFO_LEN - k,
4243 " dev_size_mb=%d, opts=0x%x, submit_queues=%d, %s=%d",
4244 sdebug_dev_size_mb, sdebug_opts, submit_queues,
4245 "statistics", (int)sdebug_statistics);
4246 return sdebug_info;
4247 }
4248
4249 /* 'echo <val> > /proc/scsi/scsi_debug/<host_id>' writes to opts */
4250 static int scsi_debug_write_info(struct Scsi_Host *host, char *buffer,
4251 int length)
4252 {
4253 char arr[16];
4254 int opts;
4255 int minLen = length > 15 ? 15 : length;
4256
4257 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
4258 return -EACCES;
4259 memcpy(arr, buffer, minLen);
4260 arr[minLen] = '\0';
4261 if (1 != sscanf(arr, "%d", &opts))
4262 return -EINVAL;
4263 sdebug_opts = opts;
4264 sdebug_verbose = !!(SDEBUG_OPT_NOISE & opts);
4265 sdebug_any_injecting_opt = !!(SDEBUG_OPT_ALL_INJECTING & opts);
4266 if (sdebug_every_nth != 0)
4267 tweak_cmnd_count();
4268 return length;
4269 }
4270
4271 /* Output seen with 'cat /proc/scsi/scsi_debug/<host_id>'. It will be the
4272 * same for each scsi_debug host (if more than one). Some of the counters
4273 * output are not atomics so might be inaccurate in a busy system. */
4274 static int scsi_debug_show_info(struct seq_file *m, struct Scsi_Host *host)
4275 {
4276 int f, j, l;
4277 struct sdebug_queue *sqp;
4278
4279 seq_printf(m, "scsi_debug adapter driver, version %s [%s]\n",
4280 SDEBUG_VERSION, sdebug_version_date);
4281 seq_printf(m, "num_tgts=%d, %ssize=%d MB, opts=0x%x, every_nth=%d\n",
4282 sdebug_num_tgts, "shared (ram) ", sdebug_dev_size_mb,
4283 sdebug_opts, sdebug_every_nth);
4284 seq_printf(m, "delay=%d, ndelay=%d, max_luns=%d, sector_size=%d %s\n",
4285 sdebug_jdelay, sdebug_ndelay, sdebug_max_luns,
4286 sdebug_sector_size, "bytes");
4287 seq_printf(m, "cylinders=%d, heads=%d, sectors=%d, command aborts=%d\n",
4288 sdebug_cylinders_per, sdebug_heads, sdebug_sectors_per,
4289 num_aborts);
4290 seq_printf(m, "RESETs: device=%d, target=%d, bus=%d, host=%d\n",
4291 num_dev_resets, num_target_resets, num_bus_resets,
4292 num_host_resets);
4293 seq_printf(m, "dix_reads=%d, dix_writes=%d, dif_errors=%d\n",
4294 dix_reads, dix_writes, dif_errors);
4295 seq_printf(m, "usec_in_jiffy=%lu, %s=%d, mq_active=%d\n",
4296 TICK_NSEC / 1000, "statistics", sdebug_statistics,
4297 sdebug_mq_active);
4298 seq_printf(m, "cmnd_count=%d, completions=%d, %s=%d, a_tsf=%d\n",
4299 atomic_read(&sdebug_cmnd_count),
4300 atomic_read(&sdebug_completions),
4301 "miss_cpus", atomic_read(&sdebug_miss_cpus),
4302 atomic_read(&sdebug_a_tsf));
4303
4304 seq_printf(m, "submit_queues=%d\n", submit_queues);
4305 for (j = 0, sqp = sdebug_q_arr; j < submit_queues; ++j, ++sqp) {
4306 seq_printf(m, " queue %d:\n", j);
4307 f = find_first_bit(sqp->in_use_bm, sdebug_max_queue);
4308 if (f != sdebug_max_queue) {
4309 l = find_last_bit(sqp->in_use_bm, sdebug_max_queue);
4310 seq_printf(m, " in_use_bm BUSY: %s: %d,%d\n",
4311 "first,last bits", f, l);
4312 }
4313 }
4314 return 0;
4315 }
4316
4317 static ssize_t delay_show(struct device_driver *ddp, char *buf)
4318 {
4319 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_jdelay);
4320 }
4321 /* Returns -EBUSY if jdelay is being changed and commands are queued. The unit
4322 * of delay is jiffies.
4323 */
4324 static ssize_t delay_store(struct device_driver *ddp, const char *buf,
4325 size_t count)
4326 {
4327 int jdelay, res;
4328
4329 if (count > 0 && sscanf(buf, "%d", &jdelay) == 1) {
4330 res = count;
4331 if (sdebug_jdelay != jdelay) {
4332 int j, k;
4333 struct sdebug_queue *sqp;
4334
4335 block_unblock_all_queues(true);
4336 for (j = 0, sqp = sdebug_q_arr; j < submit_queues;
4337 ++j, ++sqp) {
4338 k = find_first_bit(sqp->in_use_bm,
4339 sdebug_max_queue);
4340 if (k != sdebug_max_queue) {
4341 res = -EBUSY; /* queued commands */
4342 break;
4343 }
4344 }
4345 if (res > 0) {
4346 /* make sure sdebug_defer instances get
4347 * re-allocated for new delay variant */
4348 free_all_queued();
4349 sdebug_jdelay = jdelay;
4350 sdebug_ndelay = 0;
4351 }
4352 block_unblock_all_queues(false);
4353 }
4354 return res;
4355 }
4356 return -EINVAL;
4357 }
4358 static DRIVER_ATTR_RW(delay);
4359
4360 static ssize_t ndelay_show(struct device_driver *ddp, char *buf)
4361 {
4362 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_ndelay);
4363 }
4364 /* Returns -EBUSY if ndelay is being changed and commands are queued */
4365 /* If > 0 and accepted then sdebug_jdelay is set to JDELAY_OVERRIDDEN */
4366 static ssize_t ndelay_store(struct device_driver *ddp, const char *buf,
4367 size_t count)
4368 {
4369 int ndelay, res;
4370
4371 if ((count > 0) && (1 == sscanf(buf, "%d", &ndelay)) &&
4372 (ndelay >= 0) && (ndelay < (1000 * 1000 * 1000))) {
4373 res = count;
4374 if (sdebug_ndelay != ndelay) {
4375 int j, k;
4376 struct sdebug_queue *sqp;
4377
4378 block_unblock_all_queues(true);
4379 for (j = 0, sqp = sdebug_q_arr; j < submit_queues;
4380 ++j, ++sqp) {
4381 k = find_first_bit(sqp->in_use_bm,
4382 sdebug_max_queue);
4383 if (k != sdebug_max_queue) {
4384 res = -EBUSY; /* queued commands */
4385 break;
4386 }
4387 }
4388 if (res > 0) {
4389 /* make sure sdebug_defer instances get
4390 * re-allocated for new delay variant */
4391 free_all_queued();
4392 sdebug_ndelay = ndelay;
4393 sdebug_jdelay = ndelay ? JDELAY_OVERRIDDEN
4394 : DEF_JDELAY;
4395 }
4396 block_unblock_all_queues(false);
4397 }
4398 return res;
4399 }
4400 return -EINVAL;
4401 }
4402 static DRIVER_ATTR_RW(ndelay);
4403
4404 static ssize_t opts_show(struct device_driver *ddp, char *buf)
4405 {
4406 return scnprintf(buf, PAGE_SIZE, "0x%x\n", sdebug_opts);
4407 }
4408
4409 static ssize_t opts_store(struct device_driver *ddp, const char *buf,
4410 size_t count)
4411 {
4412 int opts;
4413 char work[20];
4414
4415 if (1 == sscanf(buf, "%10s", work)) {
4416 if (0 == strncasecmp(work,"0x", 2)) {
4417 if (1 == sscanf(&work[2], "%x", &opts))
4418 goto opts_done;
4419 } else {
4420 if (1 == sscanf(work, "%d", &opts))
4421 goto opts_done;
4422 }
4423 }
4424 return -EINVAL;
4425 opts_done:
4426 sdebug_opts = opts;
4427 sdebug_verbose = !!(SDEBUG_OPT_NOISE & opts);
4428 sdebug_any_injecting_opt = !!(SDEBUG_OPT_ALL_INJECTING & opts);
4429 tweak_cmnd_count();
4430 return count;
4431 }
4432 static DRIVER_ATTR_RW(opts);
4433
4434 static ssize_t ptype_show(struct device_driver *ddp, char *buf)
4435 {
4436 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_ptype);
4437 }
4438 static ssize_t ptype_store(struct device_driver *ddp, const char *buf,
4439 size_t count)
4440 {
4441 int n;
4442
4443 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
4444 sdebug_ptype = n;
4445 return count;
4446 }
4447 return -EINVAL;
4448 }
4449 static DRIVER_ATTR_RW(ptype);
4450
4451 static ssize_t dsense_show(struct device_driver *ddp, char *buf)
4452 {
4453 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_dsense);
4454 }
4455 static ssize_t dsense_store(struct device_driver *ddp, const char *buf,
4456 size_t count)
4457 {
4458 int n;
4459
4460 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
4461 sdebug_dsense = n;
4462 return count;
4463 }
4464 return -EINVAL;
4465 }
4466 static DRIVER_ATTR_RW(dsense);
4467
4468 static ssize_t fake_rw_show(struct device_driver *ddp, char *buf)
4469 {
4470 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_fake_rw);
4471 }
4472 static ssize_t fake_rw_store(struct device_driver *ddp, const char *buf,
4473 size_t count)
4474 {
4475 int n;
4476
4477 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
4478 n = (n > 0);
4479 sdebug_fake_rw = (sdebug_fake_rw > 0);
4480 if (sdebug_fake_rw != n) {
4481 if ((0 == n) && (NULL == fake_storep)) {
4482 unsigned long sz =
4483 (unsigned long)sdebug_dev_size_mb *
4484 1048576;
4485
4486 fake_storep = vmalloc(sz);
4487 if (NULL == fake_storep) {
4488 pr_err("out of memory, 9\n");
4489 return -ENOMEM;
4490 }
4491 memset(fake_storep, 0, sz);
4492 }
4493 sdebug_fake_rw = n;
4494 }
4495 return count;
4496 }
4497 return -EINVAL;
4498 }
4499 static DRIVER_ATTR_RW(fake_rw);
4500
4501 static ssize_t no_lun_0_show(struct device_driver *ddp, char *buf)
4502 {
4503 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_no_lun_0);
4504 }
4505 static ssize_t no_lun_0_store(struct device_driver *ddp, const char *buf,
4506 size_t count)
4507 {
4508 int n;
4509
4510 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
4511 sdebug_no_lun_0 = n;
4512 return count;
4513 }
4514 return -EINVAL;
4515 }
4516 static DRIVER_ATTR_RW(no_lun_0);
4517
4518 static ssize_t num_tgts_show(struct device_driver *ddp, char *buf)
4519 {
4520 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_num_tgts);
4521 }
4522 static ssize_t num_tgts_store(struct device_driver *ddp, const char *buf,
4523 size_t count)
4524 {
4525 int n;
4526
4527 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
4528 sdebug_num_tgts = n;
4529 sdebug_max_tgts_luns();
4530 return count;
4531 }
4532 return -EINVAL;
4533 }
4534 static DRIVER_ATTR_RW(num_tgts);
4535
4536 static ssize_t dev_size_mb_show(struct device_driver *ddp, char *buf)
4537 {
4538 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_dev_size_mb);
4539 }
4540 static DRIVER_ATTR_RO(dev_size_mb);
4541
4542 static ssize_t num_parts_show(struct device_driver *ddp, char *buf)
4543 {
4544 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_num_parts);
4545 }
4546 static DRIVER_ATTR_RO(num_parts);
4547
4548 static ssize_t every_nth_show(struct device_driver *ddp, char *buf)
4549 {
4550 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_every_nth);
4551 }
4552 static ssize_t every_nth_store(struct device_driver *ddp, const char *buf,
4553 size_t count)
4554 {
4555 int nth;
4556
4557 if ((count > 0) && (1 == sscanf(buf, "%d", &nth))) {
4558 sdebug_every_nth = nth;
4559 if (nth && !sdebug_statistics) {
4560 pr_info("every_nth needs statistics=1, set it\n");
4561 sdebug_statistics = true;
4562 }
4563 tweak_cmnd_count();
4564 return count;
4565 }
4566 return -EINVAL;
4567 }
4568 static DRIVER_ATTR_RW(every_nth);
4569
4570 static ssize_t max_luns_show(struct device_driver *ddp, char *buf)
4571 {
4572 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_max_luns);
4573 }
4574 static ssize_t max_luns_store(struct device_driver *ddp, const char *buf,
4575 size_t count)
4576 {
4577 int n;
4578 bool changed;
4579
4580 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
4581 if (n > 256) {
4582 pr_warn("max_luns can be no more than 256\n");
4583 return -EINVAL;
4584 }
4585 changed = (sdebug_max_luns != n);
4586 sdebug_max_luns = n;
4587 sdebug_max_tgts_luns();
4588 if (changed && (sdebug_scsi_level >= 5)) { /* >= SPC-3 */
4589 struct sdebug_host_info *sdhp;
4590 struct sdebug_dev_info *dp;
4591
4592 spin_lock(&sdebug_host_list_lock);
4593 list_for_each_entry(sdhp, &sdebug_host_list,
4594 host_list) {
4595 list_for_each_entry(dp, &sdhp->dev_info_list,
4596 dev_list) {
4597 set_bit(SDEBUG_UA_LUNS_CHANGED,
4598 dp->uas_bm);
4599 }
4600 }
4601 spin_unlock(&sdebug_host_list_lock);
4602 }
4603 return count;
4604 }
4605 return -EINVAL;
4606 }
4607 static DRIVER_ATTR_RW(max_luns);
4608
4609 static ssize_t max_queue_show(struct device_driver *ddp, char *buf)
4610 {
4611 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_max_queue);
4612 }
4613 /* N.B. max_queue can be changed while there are queued commands. In flight
4614 * commands beyond the new max_queue will be completed. */
4615 static ssize_t max_queue_store(struct device_driver *ddp, const char *buf,
4616 size_t count)
4617 {
4618 int j, n, k, a;
4619 struct sdebug_queue *sqp;
4620
4621 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n > 0) &&
4622 (n <= SDEBUG_CANQUEUE)) {
4623 block_unblock_all_queues(true);
4624 k = 0;
4625 for (j = 0, sqp = sdebug_q_arr; j < submit_queues;
4626 ++j, ++sqp) {
4627 a = find_last_bit(sqp->in_use_bm, SDEBUG_CANQUEUE);
4628 if (a > k)
4629 k = a;
4630 }
4631 sdebug_max_queue = n;
4632 if (k == SDEBUG_CANQUEUE)
4633 atomic_set(&retired_max_queue, 0);
4634 else if (k >= n)
4635 atomic_set(&retired_max_queue, k + 1);
4636 else
4637 atomic_set(&retired_max_queue, 0);
4638 block_unblock_all_queues(false);
4639 return count;
4640 }
4641 return -EINVAL;
4642 }
4643 static DRIVER_ATTR_RW(max_queue);
4644
4645 static ssize_t no_uld_show(struct device_driver *ddp, char *buf)
4646 {
4647 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_no_uld);
4648 }
4649 static DRIVER_ATTR_RO(no_uld);
4650
4651 static ssize_t scsi_level_show(struct device_driver *ddp, char *buf)
4652 {
4653 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_scsi_level);
4654 }
4655 static DRIVER_ATTR_RO(scsi_level);
4656
4657 static ssize_t virtual_gb_show(struct device_driver *ddp, char *buf)
4658 {
4659 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_virtual_gb);
4660 }
4661 static ssize_t virtual_gb_store(struct device_driver *ddp, const char *buf,
4662 size_t count)
4663 {
4664 int n;
4665 bool changed;
4666
4667 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
4668 changed = (sdebug_virtual_gb != n);
4669 sdebug_virtual_gb = n;
4670 sdebug_capacity = get_sdebug_capacity();
4671 if (changed) {
4672 struct sdebug_host_info *sdhp;
4673 struct sdebug_dev_info *dp;
4674
4675 spin_lock(&sdebug_host_list_lock);
4676 list_for_each_entry(sdhp, &sdebug_host_list,
4677 host_list) {
4678 list_for_each_entry(dp, &sdhp->dev_info_list,
4679 dev_list) {
4680 set_bit(SDEBUG_UA_CAPACITY_CHANGED,
4681 dp->uas_bm);
4682 }
4683 }
4684 spin_unlock(&sdebug_host_list_lock);
4685 }
4686 return count;
4687 }
4688 return -EINVAL;
4689 }
4690 static DRIVER_ATTR_RW(virtual_gb);
4691
4692 static ssize_t add_host_show(struct device_driver *ddp, char *buf)
4693 {
4694 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_add_host);
4695 }
4696
4697 static int sdebug_add_adapter(void);
4698 static void sdebug_remove_adapter(void);
4699
4700 static ssize_t add_host_store(struct device_driver *ddp, const char *buf,
4701 size_t count)
4702 {
4703 int delta_hosts;
4704
4705 if (sscanf(buf, "%d", &delta_hosts) != 1)
4706 return -EINVAL;
4707 if (delta_hosts > 0) {
4708 do {
4709 sdebug_add_adapter();
4710 } while (--delta_hosts);
4711 } else if (delta_hosts < 0) {
4712 do {
4713 sdebug_remove_adapter();
4714 } while (++delta_hosts);
4715 }
4716 return count;
4717 }
4718 static DRIVER_ATTR_RW(add_host);
4719
4720 static ssize_t vpd_use_hostno_show(struct device_driver *ddp, char *buf)
4721 {
4722 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_vpd_use_hostno);
4723 }
4724 static ssize_t vpd_use_hostno_store(struct device_driver *ddp, const char *buf,
4725 size_t count)
4726 {
4727 int n;
4728
4729 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
4730 sdebug_vpd_use_hostno = n;
4731 return count;
4732 }
4733 return -EINVAL;
4734 }
4735 static DRIVER_ATTR_RW(vpd_use_hostno);
4736
4737 static ssize_t statistics_show(struct device_driver *ddp, char *buf)
4738 {
4739 return scnprintf(buf, PAGE_SIZE, "%d\n", (int)sdebug_statistics);
4740 }
4741 static ssize_t statistics_store(struct device_driver *ddp, const char *buf,
4742 size_t count)
4743 {
4744 int n;
4745
4746 if ((count > 0) && (sscanf(buf, "%d", &n) == 1) && (n >= 0)) {
4747 if (n > 0)
4748 sdebug_statistics = true;
4749 else {
4750 clear_queue_stats();
4751 sdebug_statistics = false;
4752 }
4753 return count;
4754 }
4755 return -EINVAL;
4756 }
4757 static DRIVER_ATTR_RW(statistics);
4758
4759 static ssize_t sector_size_show(struct device_driver *ddp, char *buf)
4760 {
4761 return scnprintf(buf, PAGE_SIZE, "%u\n", sdebug_sector_size);
4762 }
4763 static DRIVER_ATTR_RO(sector_size);
4764
4765 static ssize_t submit_queues_show(struct device_driver *ddp, char *buf)
4766 {
4767 return scnprintf(buf, PAGE_SIZE, "%d\n", submit_queues);
4768 }
4769 static DRIVER_ATTR_RO(submit_queues);
4770
4771 static ssize_t dix_show(struct device_driver *ddp, char *buf)
4772 {
4773 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_dix);
4774 }
4775 static DRIVER_ATTR_RO(dix);
4776
4777 static ssize_t dif_show(struct device_driver *ddp, char *buf)
4778 {
4779 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_dif);
4780 }
4781 static DRIVER_ATTR_RO(dif);
4782
4783 static ssize_t guard_show(struct device_driver *ddp, char *buf)
4784 {
4785 return scnprintf(buf, PAGE_SIZE, "%u\n", sdebug_guard);
4786 }
4787 static DRIVER_ATTR_RO(guard);
4788
4789 static ssize_t ato_show(struct device_driver *ddp, char *buf)
4790 {
4791 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_ato);
4792 }
4793 static DRIVER_ATTR_RO(ato);
4794
4795 static ssize_t map_show(struct device_driver *ddp, char *buf)
4796 {
4797 ssize_t count;
4798
4799 if (!scsi_debug_lbp())
4800 return scnprintf(buf, PAGE_SIZE, "0-%u\n",
4801 sdebug_store_sectors);
4802
4803 count = scnprintf(buf, PAGE_SIZE - 1, "%*pbl",
4804 (int)map_size, map_storep);
4805 buf[count++] = '\n';
4806 buf[count] = '\0';
4807
4808 return count;
4809 }
4810 static DRIVER_ATTR_RO(map);
4811
4812 static ssize_t removable_show(struct device_driver *ddp, char *buf)
4813 {
4814 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_removable ? 1 : 0);
4815 }
4816 static ssize_t removable_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_removable = (n > 0);
4823 return count;
4824 }
4825 return -EINVAL;
4826 }
4827 static DRIVER_ATTR_RW(removable);
4828
4829 static ssize_t host_lock_show(struct device_driver *ddp, char *buf)
4830 {
4831 return scnprintf(buf, PAGE_SIZE, "%d\n", !!sdebug_host_lock);
4832 }
4833 /* N.B. sdebug_host_lock does nothing, kept for backward compatibility */
4834 static ssize_t host_lock_store(struct device_driver *ddp, const char *buf,
4835 size_t count)
4836 {
4837 int n;
4838
4839 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
4840 sdebug_host_lock = (n > 0);
4841 return count;
4842 }
4843 return -EINVAL;
4844 }
4845 static DRIVER_ATTR_RW(host_lock);
4846
4847 static ssize_t strict_show(struct device_driver *ddp, char *buf)
4848 {
4849 return scnprintf(buf, PAGE_SIZE, "%d\n", !!sdebug_strict);
4850 }
4851 static ssize_t strict_store(struct device_driver *ddp, const char *buf,
4852 size_t count)
4853 {
4854 int n;
4855
4856 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
4857 sdebug_strict = (n > 0);
4858 return count;
4859 }
4860 return -EINVAL;
4861 }
4862 static DRIVER_ATTR_RW(strict);
4863
4864 static ssize_t uuid_ctl_show(struct device_driver *ddp, char *buf)
4865 {
4866 return scnprintf(buf, PAGE_SIZE, "%d\n", !!sdebug_uuid_ctl);
4867 }
4868 static DRIVER_ATTR_RO(uuid_ctl);
4869
4870
4871 /* Note: The following array creates attribute files in the
4872 /sys/bus/pseudo/drivers/scsi_debug directory. The advantage of these
4873 files (over those found in the /sys/module/scsi_debug/parameters
4874 directory) is that auxiliary actions can be triggered when an attribute
4875 is changed. For example see: sdebug_add_host_store() above.
4876 */
4877
4878 static struct attribute *sdebug_drv_attrs[] = {
4879 &driver_attr_delay.attr,
4880 &driver_attr_opts.attr,
4881 &driver_attr_ptype.attr,
4882 &driver_attr_dsense.attr,
4883 &driver_attr_fake_rw.attr,
4884 &driver_attr_no_lun_0.attr,
4885 &driver_attr_num_tgts.attr,
4886 &driver_attr_dev_size_mb.attr,
4887 &driver_attr_num_parts.attr,
4888 &driver_attr_every_nth.attr,
4889 &driver_attr_max_luns.attr,
4890 &driver_attr_max_queue.attr,
4891 &driver_attr_no_uld.attr,
4892 &driver_attr_scsi_level.attr,
4893 &driver_attr_virtual_gb.attr,
4894 &driver_attr_add_host.attr,
4895 &driver_attr_vpd_use_hostno.attr,
4896 &driver_attr_sector_size.attr,
4897 &driver_attr_statistics.attr,
4898 &driver_attr_submit_queues.attr,
4899 &driver_attr_dix.attr,
4900 &driver_attr_dif.attr,
4901 &driver_attr_guard.attr,
4902 &driver_attr_ato.attr,
4903 &driver_attr_map.attr,
4904 &driver_attr_removable.attr,
4905 &driver_attr_host_lock.attr,
4906 &driver_attr_ndelay.attr,
4907 &driver_attr_strict.attr,
4908 &driver_attr_uuid_ctl.attr,
4909 NULL,
4910 };
4911 ATTRIBUTE_GROUPS(sdebug_drv);
4912
4913 static struct device *pseudo_primary;
4914
4915 static int __init scsi_debug_init(void)
4916 {
4917 unsigned long sz;
4918 int host_to_add;
4919 int k;
4920 int ret;
4921
4922 atomic_set(&retired_max_queue, 0);
4923
4924 if (sdebug_ndelay >= 1000 * 1000 * 1000) {
4925 pr_warn("ndelay must be less than 1 second, ignored\n");
4926 sdebug_ndelay = 0;
4927 } else if (sdebug_ndelay > 0)
4928 sdebug_jdelay = JDELAY_OVERRIDDEN;
4929
4930 switch (sdebug_sector_size) {
4931 case 512:
4932 case 1024:
4933 case 2048:
4934 case 4096:
4935 break;
4936 default:
4937 pr_err("invalid sector_size %d\n", sdebug_sector_size);
4938 return -EINVAL;
4939 }
4940
4941 switch (sdebug_dif) {
4942
4943 case SD_DIF_TYPE0_PROTECTION:
4944 break;
4945 case SD_DIF_TYPE1_PROTECTION:
4946 case SD_DIF_TYPE2_PROTECTION:
4947 case SD_DIF_TYPE3_PROTECTION:
4948 have_dif_prot = true;
4949 break;
4950
4951 default:
4952 pr_err("dif must be 0, 1, 2 or 3\n");
4953 return -EINVAL;
4954 }
4955
4956 if (sdebug_guard > 1) {
4957 pr_err("guard must be 0 or 1\n");
4958 return -EINVAL;
4959 }
4960
4961 if (sdebug_ato > 1) {
4962 pr_err("ato must be 0 or 1\n");
4963 return -EINVAL;
4964 }
4965
4966 if (sdebug_physblk_exp > 15) {
4967 pr_err("invalid physblk_exp %u\n", sdebug_physblk_exp);
4968 return -EINVAL;
4969 }
4970 if (sdebug_max_luns > 256) {
4971 pr_warn("max_luns can be no more than 256, use default\n");
4972 sdebug_max_luns = DEF_MAX_LUNS;
4973 }
4974
4975 if (sdebug_lowest_aligned > 0x3fff) {
4976 pr_err("lowest_aligned too big: %u\n", sdebug_lowest_aligned);
4977 return -EINVAL;
4978 }
4979
4980 if (submit_queues < 1) {
4981 pr_err("submit_queues must be 1 or more\n");
4982 return -EINVAL;
4983 }
4984 sdebug_q_arr = kcalloc(submit_queues, sizeof(struct sdebug_queue),
4985 GFP_KERNEL);
4986 if (sdebug_q_arr == NULL)
4987 return -ENOMEM;
4988 for (k = 0; k < submit_queues; ++k)
4989 spin_lock_init(&sdebug_q_arr[k].qc_lock);
4990
4991 if (sdebug_dev_size_mb < 1)
4992 sdebug_dev_size_mb = 1; /* force minimum 1 MB ramdisk */
4993 sz = (unsigned long)sdebug_dev_size_mb * 1048576;
4994 sdebug_store_sectors = sz / sdebug_sector_size;
4995 sdebug_capacity = get_sdebug_capacity();
4996
4997 /* play around with geometry, don't waste too much on track 0 */
4998 sdebug_heads = 8;
4999 sdebug_sectors_per = 32;
5000 if (sdebug_dev_size_mb >= 256)
5001 sdebug_heads = 64;
5002 else if (sdebug_dev_size_mb >= 16)
5003 sdebug_heads = 32;
5004 sdebug_cylinders_per = (unsigned long)sdebug_capacity /
5005 (sdebug_sectors_per * sdebug_heads);
5006 if (sdebug_cylinders_per >= 1024) {
5007 /* other LLDs do this; implies >= 1GB ram disk ... */
5008 sdebug_heads = 255;
5009 sdebug_sectors_per = 63;
5010 sdebug_cylinders_per = (unsigned long)sdebug_capacity /
5011 (sdebug_sectors_per * sdebug_heads);
5012 }
5013
5014 if (sdebug_fake_rw == 0) {
5015 fake_storep = vmalloc(sz);
5016 if (NULL == fake_storep) {
5017 pr_err("out of memory, 1\n");
5018 ret = -ENOMEM;
5019 goto free_q_arr;
5020 }
5021 memset(fake_storep, 0, sz);
5022 if (sdebug_num_parts > 0)
5023 sdebug_build_parts(fake_storep, sz);
5024 }
5025
5026 if (sdebug_dix) {
5027 int dif_size;
5028
5029 dif_size = sdebug_store_sectors * sizeof(struct sd_dif_tuple);
5030 dif_storep = vmalloc(dif_size);
5031
5032 pr_err("dif_storep %u bytes @ %p\n", dif_size, dif_storep);
5033
5034 if (dif_storep == NULL) {
5035 pr_err("out of mem. (DIX)\n");
5036 ret = -ENOMEM;
5037 goto free_vm;
5038 }
5039
5040 memset(dif_storep, 0xff, dif_size);
5041 }
5042
5043 /* Logical Block Provisioning */
5044 if (scsi_debug_lbp()) {
5045 sdebug_unmap_max_blocks =
5046 clamp(sdebug_unmap_max_blocks, 0U, 0xffffffffU);
5047
5048 sdebug_unmap_max_desc =
5049 clamp(sdebug_unmap_max_desc, 0U, 256U);
5050
5051 sdebug_unmap_granularity =
5052 clamp(sdebug_unmap_granularity, 1U, 0xffffffffU);
5053
5054 if (sdebug_unmap_alignment &&
5055 sdebug_unmap_granularity <=
5056 sdebug_unmap_alignment) {
5057 pr_err("ERR: unmap_granularity <= unmap_alignment\n");
5058 ret = -EINVAL;
5059 goto free_vm;
5060 }
5061
5062 map_size = lba_to_map_index(sdebug_store_sectors - 1) + 1;
5063 map_storep = vmalloc(BITS_TO_LONGS(map_size) * sizeof(long));
5064
5065 pr_info("%lu provisioning blocks\n", map_size);
5066
5067 if (map_storep == NULL) {
5068 pr_err("out of mem. (MAP)\n");
5069 ret = -ENOMEM;
5070 goto free_vm;
5071 }
5072
5073 bitmap_zero(map_storep, map_size);
5074
5075 /* Map first 1KB for partition table */
5076 if (sdebug_num_parts)
5077 map_region(0, 2);
5078 }
5079
5080 pseudo_primary = root_device_register("pseudo_0");
5081 if (IS_ERR(pseudo_primary)) {
5082 pr_warn("root_device_register() error\n");
5083 ret = PTR_ERR(pseudo_primary);
5084 goto free_vm;
5085 }
5086 ret = bus_register(&pseudo_lld_bus);
5087 if (ret < 0) {
5088 pr_warn("bus_register error: %d\n", ret);
5089 goto dev_unreg;
5090 }
5091 ret = driver_register(&sdebug_driverfs_driver);
5092 if (ret < 0) {
5093 pr_warn("driver_register error: %d\n", ret);
5094 goto bus_unreg;
5095 }
5096
5097 host_to_add = sdebug_add_host;
5098 sdebug_add_host = 0;
5099
5100 for (k = 0; k < host_to_add; k++) {
5101 if (sdebug_add_adapter()) {
5102 pr_err("sdebug_add_adapter failed k=%d\n", k);
5103 break;
5104 }
5105 }
5106
5107 if (sdebug_verbose)
5108 pr_info("built %d host(s)\n", sdebug_add_host);
5109
5110 return 0;
5111
5112 bus_unreg:
5113 bus_unregister(&pseudo_lld_bus);
5114 dev_unreg:
5115 root_device_unregister(pseudo_primary);
5116 free_vm:
5117 vfree(map_storep);
5118 vfree(dif_storep);
5119 vfree(fake_storep);
5120 free_q_arr:
5121 kfree(sdebug_q_arr);
5122 return ret;
5123 }
5124
5125 static void __exit scsi_debug_exit(void)
5126 {
5127 int k = sdebug_add_host;
5128
5129 stop_all_queued();
5130 free_all_queued();
5131 for (; k; k--)
5132 sdebug_remove_adapter();
5133 driver_unregister(&sdebug_driverfs_driver);
5134 bus_unregister(&pseudo_lld_bus);
5135 root_device_unregister(pseudo_primary);
5136
5137 vfree(dif_storep);
5138 vfree(fake_storep);
5139 kfree(sdebug_q_arr);
5140 }
5141
5142 device_initcall(scsi_debug_init);
5143 module_exit(scsi_debug_exit);
5144
5145 static void sdebug_release_adapter(struct device * dev)
5146 {
5147 struct sdebug_host_info *sdbg_host;
5148
5149 sdbg_host = to_sdebug_host(dev);
5150 kfree(sdbg_host);
5151 }
5152
5153 static int sdebug_add_adapter(void)
5154 {
5155 int k, devs_per_host;
5156 int error = 0;
5157 struct sdebug_host_info *sdbg_host;
5158 struct sdebug_dev_info *sdbg_devinfo, *tmp;
5159
5160 sdbg_host = kzalloc(sizeof(*sdbg_host),GFP_KERNEL);
5161 if (NULL == sdbg_host) {
5162 pr_err("out of memory at line %d\n", __LINE__);
5163 return -ENOMEM;
5164 }
5165
5166 INIT_LIST_HEAD(&sdbg_host->dev_info_list);
5167
5168 devs_per_host = sdebug_num_tgts * sdebug_max_luns;
5169 for (k = 0; k < devs_per_host; k++) {
5170 sdbg_devinfo = sdebug_device_create(sdbg_host, GFP_KERNEL);
5171 if (!sdbg_devinfo) {
5172 pr_err("out of memory at line %d\n", __LINE__);
5173 error = -ENOMEM;
5174 goto clean;
5175 }
5176 }
5177
5178 spin_lock(&sdebug_host_list_lock);
5179 list_add_tail(&sdbg_host->host_list, &sdebug_host_list);
5180 spin_unlock(&sdebug_host_list_lock);
5181
5182 sdbg_host->dev.bus = &pseudo_lld_bus;
5183 sdbg_host->dev.parent = pseudo_primary;
5184 sdbg_host->dev.release = &sdebug_release_adapter;
5185 dev_set_name(&sdbg_host->dev, "adapter%d", sdebug_add_host);
5186
5187 error = device_register(&sdbg_host->dev);
5188
5189 if (error)
5190 goto clean;
5191
5192 ++sdebug_add_host;
5193 return error;
5194
5195 clean:
5196 list_for_each_entry_safe(sdbg_devinfo, tmp, &sdbg_host->dev_info_list,
5197 dev_list) {
5198 list_del(&sdbg_devinfo->dev_list);
5199 kfree(sdbg_devinfo);
5200 }
5201
5202 kfree(sdbg_host);
5203 return error;
5204 }
5205
5206 static void sdebug_remove_adapter(void)
5207 {
5208 struct sdebug_host_info * sdbg_host = NULL;
5209
5210 spin_lock(&sdebug_host_list_lock);
5211 if (!list_empty(&sdebug_host_list)) {
5212 sdbg_host = list_entry(sdebug_host_list.prev,
5213 struct sdebug_host_info, host_list);
5214 list_del(&sdbg_host->host_list);
5215 }
5216 spin_unlock(&sdebug_host_list_lock);
5217
5218 if (!sdbg_host)
5219 return;
5220
5221 device_unregister(&sdbg_host->dev);
5222 --sdebug_add_host;
5223 }
5224
5225 static int sdebug_change_qdepth(struct scsi_device *sdev, int qdepth)
5226 {
5227 int num_in_q = 0;
5228 struct sdebug_dev_info *devip;
5229
5230 block_unblock_all_queues(true);
5231 devip = (struct sdebug_dev_info *)sdev->hostdata;
5232 if (NULL == devip) {
5233 block_unblock_all_queues(false);
5234 return -ENODEV;
5235 }
5236 num_in_q = atomic_read(&devip->num_in_q);
5237
5238 if (qdepth < 1)
5239 qdepth = 1;
5240 /* allow to exceed max host qc_arr elements for testing */
5241 if (qdepth > SDEBUG_CANQUEUE + 10)
5242 qdepth = SDEBUG_CANQUEUE + 10;
5243 scsi_change_queue_depth(sdev, qdepth);
5244
5245 if (SDEBUG_OPT_Q_NOISE & sdebug_opts) {
5246 sdev_printk(KERN_INFO, sdev, "%s: qdepth=%d, num_in_q=%d\n",
5247 __func__, qdepth, num_in_q);
5248 }
5249 block_unblock_all_queues(false);
5250 return sdev->queue_depth;
5251 }
5252
5253 static bool fake_timeout(struct scsi_cmnd *scp)
5254 {
5255 if (0 == (atomic_read(&sdebug_cmnd_count) % abs(sdebug_every_nth))) {
5256 if (sdebug_every_nth < -1)
5257 sdebug_every_nth = -1;
5258 if (SDEBUG_OPT_TIMEOUT & sdebug_opts)
5259 return true; /* ignore command causing timeout */
5260 else if (SDEBUG_OPT_MAC_TIMEOUT & sdebug_opts &&
5261 scsi_medium_access_command(scp))
5262 return true; /* time out reads and writes */
5263 }
5264 return false;
5265 }
5266
5267 static int scsi_debug_queuecommand(struct Scsi_Host *shost,
5268 struct scsi_cmnd *scp)
5269 {
5270 u8 sdeb_i;
5271 struct scsi_device *sdp = scp->device;
5272 const struct opcode_info_t *oip;
5273 const struct opcode_info_t *r_oip;
5274 struct sdebug_dev_info *devip;
5275 u8 *cmd = scp->cmnd;
5276 int (*r_pfp)(struct scsi_cmnd *, struct sdebug_dev_info *);
5277 int k, na;
5278 int errsts = 0;
5279 u32 flags;
5280 u16 sa;
5281 u8 opcode = cmd[0];
5282 bool has_wlun_rl;
5283
5284 scsi_set_resid(scp, 0);
5285 if (sdebug_statistics)
5286 atomic_inc(&sdebug_cmnd_count);
5287 if (unlikely(sdebug_verbose &&
5288 !(SDEBUG_OPT_NO_CDB_NOISE & sdebug_opts))) {
5289 char b[120];
5290 int n, len, sb;
5291
5292 len = scp->cmd_len;
5293 sb = (int)sizeof(b);
5294 if (len > 32)
5295 strcpy(b, "too long, over 32 bytes");
5296 else {
5297 for (k = 0, n = 0; k < len && n < sb; ++k)
5298 n += scnprintf(b + n, sb - n, "%02x ",
5299 (u32)cmd[k]);
5300 }
5301 if (sdebug_mq_active)
5302 sdev_printk(KERN_INFO, sdp, "%s: tag=%u, cmd %s\n",
5303 my_name, blk_mq_unique_tag(scp->request),
5304 b);
5305 else
5306 sdev_printk(KERN_INFO, sdp, "%s: cmd %s\n", my_name,
5307 b);
5308 }
5309 has_wlun_rl = (sdp->lun == SCSI_W_LUN_REPORT_LUNS);
5310 if (unlikely((sdp->lun >= sdebug_max_luns) && !has_wlun_rl))
5311 goto err_out;
5312
5313 sdeb_i = opcode_ind_arr[opcode]; /* fully mapped */
5314 oip = &opcode_info_arr[sdeb_i]; /* safe if table consistent */
5315 devip = (struct sdebug_dev_info *)sdp->hostdata;
5316 if (unlikely(!devip)) {
5317 devip = find_build_dev_info(sdp);
5318 if (NULL == devip)
5319 goto err_out;
5320 }
5321 na = oip->num_attached;
5322 r_pfp = oip->pfp;
5323 if (na) { /* multiple commands with this opcode */
5324 r_oip = oip;
5325 if (FF_SA & r_oip->flags) {
5326 if (F_SA_LOW & oip->flags)
5327 sa = 0x1f & cmd[1];
5328 else
5329 sa = get_unaligned_be16(cmd + 8);
5330 for (k = 0; k <= na; oip = r_oip->arrp + k++) {
5331 if (opcode == oip->opcode && sa == oip->sa)
5332 break;
5333 }
5334 } else { /* since no service action only check opcode */
5335 for (k = 0; k <= na; oip = r_oip->arrp + k++) {
5336 if (opcode == oip->opcode)
5337 break;
5338 }
5339 }
5340 if (k > na) {
5341 if (F_SA_LOW & r_oip->flags)
5342 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 4);
5343 else if (F_SA_HIGH & r_oip->flags)
5344 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 8, 7);
5345 else
5346 mk_sense_invalid_opcode(scp);
5347 goto check_cond;
5348 }
5349 } /* else (when na==0) we assume the oip is a match */
5350 flags = oip->flags;
5351 if (unlikely(F_INV_OP & flags)) {
5352 mk_sense_invalid_opcode(scp);
5353 goto check_cond;
5354 }
5355 if (unlikely(has_wlun_rl && !(F_RL_WLUN_OK & flags))) {
5356 if (sdebug_verbose)
5357 sdev_printk(KERN_INFO, sdp, "%s: Opcode 0x%x not%s\n",
5358 my_name, opcode, " supported for wlun");
5359 mk_sense_invalid_opcode(scp);
5360 goto check_cond;
5361 }
5362 if (unlikely(sdebug_strict)) { /* check cdb against mask */
5363 u8 rem;
5364 int j;
5365
5366 for (k = 1; k < oip->len_mask[0] && k < 16; ++k) {
5367 rem = ~oip->len_mask[k] & cmd[k];
5368 if (rem) {
5369 for (j = 7; j >= 0; --j, rem <<= 1) {
5370 if (0x80 & rem)
5371 break;
5372 }
5373 mk_sense_invalid_fld(scp, SDEB_IN_CDB, k, j);
5374 goto check_cond;
5375 }
5376 }
5377 }
5378 if (unlikely(!(F_SKIP_UA & flags) &&
5379 find_first_bit(devip->uas_bm,
5380 SDEBUG_NUM_UAS) != SDEBUG_NUM_UAS)) {
5381 errsts = make_ua(scp, devip);
5382 if (errsts)
5383 goto check_cond;
5384 }
5385 if (unlikely((F_M_ACCESS & flags) && atomic_read(&devip->stopped))) {
5386 mk_sense_buffer(scp, NOT_READY, LOGICAL_UNIT_NOT_READY, 0x2);
5387 if (sdebug_verbose)
5388 sdev_printk(KERN_INFO, sdp, "%s reports: Not ready: "
5389 "%s\n", my_name, "initializing command "
5390 "required");
5391 errsts = check_condition_result;
5392 goto fini;
5393 }
5394 if (sdebug_fake_rw && (F_FAKE_RW & flags))
5395 goto fini;
5396 if (unlikely(sdebug_every_nth)) {
5397 if (fake_timeout(scp))
5398 return 0; /* ignore command: make trouble */
5399 }
5400 if (likely(oip->pfp))
5401 errsts = oip->pfp(scp, devip); /* calls a resp_* function */
5402 else if (r_pfp) /* if leaf function ptr NULL, try the root's */
5403 errsts = r_pfp(scp, devip);
5404
5405 fini:
5406 return schedule_resp(scp, devip, errsts,
5407 ((F_DELAY_OVERR & flags) ? 0 : sdebug_jdelay));
5408 check_cond:
5409 return schedule_resp(scp, devip, check_condition_result, 0);
5410 err_out:
5411 return schedule_resp(scp, NULL, DID_NO_CONNECT << 16, 0);
5412 }
5413
5414 static struct scsi_host_template sdebug_driver_template = {
5415 .show_info = scsi_debug_show_info,
5416 .write_info = scsi_debug_write_info,
5417 .proc_name = sdebug_proc_name,
5418 .name = "SCSI DEBUG",
5419 .info = scsi_debug_info,
5420 .slave_alloc = scsi_debug_slave_alloc,
5421 .slave_configure = scsi_debug_slave_configure,
5422 .slave_destroy = scsi_debug_slave_destroy,
5423 .ioctl = scsi_debug_ioctl,
5424 .queuecommand = scsi_debug_queuecommand,
5425 .change_queue_depth = sdebug_change_qdepth,
5426 .eh_abort_handler = scsi_debug_abort,
5427 .eh_device_reset_handler = scsi_debug_device_reset,
5428 .eh_target_reset_handler = scsi_debug_target_reset,
5429 .eh_bus_reset_handler = scsi_debug_bus_reset,
5430 .eh_host_reset_handler = scsi_debug_host_reset,
5431 .can_queue = SDEBUG_CANQUEUE,
5432 .this_id = 7,
5433 .sg_tablesize = SG_MAX_SEGMENTS,
5434 .cmd_per_lun = DEF_CMD_PER_LUN,
5435 .max_sectors = -1U,
5436 .use_clustering = DISABLE_CLUSTERING,
5437 .module = THIS_MODULE,
5438 .track_queue_depth = 1,
5439 };
5440
5441 static int sdebug_driver_probe(struct device * dev)
5442 {
5443 int error = 0;
5444 struct sdebug_host_info *sdbg_host;
5445 struct Scsi_Host *hpnt;
5446 int hprot;
5447
5448 sdbg_host = to_sdebug_host(dev);
5449
5450 sdebug_driver_template.can_queue = sdebug_max_queue;
5451 if (sdebug_clustering)
5452 sdebug_driver_template.use_clustering = ENABLE_CLUSTERING;
5453 hpnt = scsi_host_alloc(&sdebug_driver_template, sizeof(sdbg_host));
5454 if (NULL == hpnt) {
5455 pr_err("scsi_host_alloc failed\n");
5456 error = -ENODEV;
5457 return error;
5458 }
5459 if (submit_queues > nr_cpu_ids) {
5460 pr_warn("%s: trim submit_queues (was %d) to nr_cpu_ids=%d\n",
5461 my_name, submit_queues, nr_cpu_ids);
5462 submit_queues = nr_cpu_ids;
5463 }
5464 /* Decide whether to tell scsi subsystem that we want mq */
5465 /* Following should give the same answer for each host */
5466 sdebug_mq_active = shost_use_blk_mq(hpnt) && (submit_queues > 1);
5467 if (sdebug_mq_active)
5468 hpnt->nr_hw_queues = submit_queues;
5469
5470 sdbg_host->shost = hpnt;
5471 *((struct sdebug_host_info **)hpnt->hostdata) = sdbg_host;
5472 if ((hpnt->this_id >= 0) && (sdebug_num_tgts > hpnt->this_id))
5473 hpnt->max_id = sdebug_num_tgts + 1;
5474 else
5475 hpnt->max_id = sdebug_num_tgts;
5476 /* = sdebug_max_luns; */
5477 hpnt->max_lun = SCSI_W_LUN_REPORT_LUNS + 1;
5478
5479 hprot = 0;
5480
5481 switch (sdebug_dif) {
5482
5483 case SD_DIF_TYPE1_PROTECTION:
5484 hprot = SHOST_DIF_TYPE1_PROTECTION;
5485 if (sdebug_dix)
5486 hprot |= SHOST_DIX_TYPE1_PROTECTION;
5487 break;
5488
5489 case SD_DIF_TYPE2_PROTECTION:
5490 hprot = SHOST_DIF_TYPE2_PROTECTION;
5491 if (sdebug_dix)
5492 hprot |= SHOST_DIX_TYPE2_PROTECTION;
5493 break;
5494
5495 case SD_DIF_TYPE3_PROTECTION:
5496 hprot = SHOST_DIF_TYPE3_PROTECTION;
5497 if (sdebug_dix)
5498 hprot |= SHOST_DIX_TYPE3_PROTECTION;
5499 break;
5500
5501 default:
5502 if (sdebug_dix)
5503 hprot |= SHOST_DIX_TYPE0_PROTECTION;
5504 break;
5505 }
5506
5507 scsi_host_set_prot(hpnt, hprot);
5508
5509 if (have_dif_prot || sdebug_dix)
5510 pr_info("host protection%s%s%s%s%s%s%s\n",
5511 (hprot & SHOST_DIF_TYPE1_PROTECTION) ? " DIF1" : "",
5512 (hprot & SHOST_DIF_TYPE2_PROTECTION) ? " DIF2" : "",
5513 (hprot & SHOST_DIF_TYPE3_PROTECTION) ? " DIF3" : "",
5514 (hprot & SHOST_DIX_TYPE0_PROTECTION) ? " DIX0" : "",
5515 (hprot & SHOST_DIX_TYPE1_PROTECTION) ? " DIX1" : "",
5516 (hprot & SHOST_DIX_TYPE2_PROTECTION) ? " DIX2" : "",
5517 (hprot & SHOST_DIX_TYPE3_PROTECTION) ? " DIX3" : "");
5518
5519 if (sdebug_guard == 1)
5520 scsi_host_set_guard(hpnt, SHOST_DIX_GUARD_IP);
5521 else
5522 scsi_host_set_guard(hpnt, SHOST_DIX_GUARD_CRC);
5523
5524 sdebug_verbose = !!(SDEBUG_OPT_NOISE & sdebug_opts);
5525 sdebug_any_injecting_opt = !!(SDEBUG_OPT_ALL_INJECTING & sdebug_opts);
5526 if (sdebug_every_nth) /* need stats counters for every_nth */
5527 sdebug_statistics = true;
5528 error = scsi_add_host(hpnt, &sdbg_host->dev);
5529 if (error) {
5530 pr_err("scsi_add_host failed\n");
5531 error = -ENODEV;
5532 scsi_host_put(hpnt);
5533 } else
5534 scsi_scan_host(hpnt);
5535
5536 return error;
5537 }
5538
5539 static int sdebug_driver_remove(struct device * dev)
5540 {
5541 struct sdebug_host_info *sdbg_host;
5542 struct sdebug_dev_info *sdbg_devinfo, *tmp;
5543
5544 sdbg_host = to_sdebug_host(dev);
5545
5546 if (!sdbg_host) {
5547 pr_err("Unable to locate host info\n");
5548 return -ENODEV;
5549 }
5550
5551 scsi_remove_host(sdbg_host->shost);
5552
5553 list_for_each_entry_safe(sdbg_devinfo, tmp, &sdbg_host->dev_info_list,
5554 dev_list) {
5555 list_del(&sdbg_devinfo->dev_list);
5556 kfree(sdbg_devinfo);
5557 }
5558
5559 scsi_host_put(sdbg_host->shost);
5560 return 0;
5561 }
5562
5563 static int pseudo_lld_bus_match(struct device *dev,
5564 struct device_driver *dev_driver)
5565 {
5566 return 1;
5567 }
5568
5569 static struct bus_type pseudo_lld_bus = {
5570 .name = "pseudo",
5571 .match = pseudo_lld_bus_match,
5572 .probe = sdebug_driver_probe,
5573 .remove = sdebug_driver_remove,
5574 .drv_groups = sdebug_drv_groups,
5575 };
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