1 | /* |
2 | * vvvvvvvvvvvvvvvvvvvvvvv Original vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv |
3 | * Copyright (C) 1992 Eric Youngdale |
4 | * Simulate a host adapter with 2 disks attached. Do a lot of checking |
5 | * to make sure that we are not getting blocks mixed up, and PANIC if |
6 | * anything out of the ordinary is seen. |
7 | * ^^^^^^^^^^^^^^^^^^^^^^^ Original ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ |
8 | * |
9 | * Copyright (C) 2001 - 2018 Douglas Gilbert |
10 | * |
11 | * This program is free software; you can redistribute it and/or modify |
12 | * it under the terms of the GNU General Public License as published by |
13 | * the Free Software Foundation; either version 2, or (at your option) |
14 | * any later version. |
15 | * |
16 | * For documentation see http://sg.danny.cz/sg/sdebug26.html |
17 | * |
18 | */ |
19 | |
20 | |
21 | #define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__ |
22 | |
23 | #include <linux/module.h> |
24 | |
25 | #include <linux/kernel.h> |
26 | #include <linux/errno.h> |
27 | #include <linux/jiffies.h> |
28 | #include <linux/slab.h> |
29 | #include <linux/types.h> |
30 | #include <linux/string.h> |
31 | #include <linux/genhd.h> |
32 | #include <linux/fs.h> |
33 | #include <linux/init.h> |
34 | #include <linux/proc_fs.h> |
35 | #include <linux/vmalloc.h> |
36 | #include <linux/moduleparam.h> |
37 | #include <linux/scatterlist.h> |
38 | #include <linux/blkdev.h> |
39 | #include <linux/crc-t10dif.h> |
40 | #include <linux/spinlock.h> |
41 | #include <linux/interrupt.h> |
42 | #include <linux/atomic.h> |
43 | #include <linux/hrtimer.h> |
44 | #include <linux/uuid.h> |
45 | #include <linux/t10-pi.h> |
46 | |
47 | #include <net/checksum.h> |
48 | |
49 | #include <asm/unaligned.h> |
50 | |
51 | #include <scsi/scsi.h> |
52 | #include <scsi/scsi_cmnd.h> |
53 | #include <scsi/scsi_device.h> |
54 | #include <scsi/scsi_host.h> |
55 | #include <scsi/scsicam.h> |
56 | #include <scsi/scsi_eh.h> |
57 | #include <scsi/scsi_tcq.h> |
58 | #include <scsi/scsi_dbg.h> |
59 | |
60 | #include "sd.h" |
61 | #include "scsi_logging.h" |
62 | |
63 | /* make sure inq_product_rev string corresponds to this version */ |
64 | #define SDEBUG_VERSION "0188" /* format to fit INQUIRY revision field */ |
65 | static const char *sdebug_version_date = "20190125" ; |
66 | |
67 | #define MY_NAME "scsi_debug" |
68 | |
69 | /* Additional Sense Code (ASC) */ |
70 | #define NO_ADDITIONAL_SENSE 0x0 |
71 | #define LOGICAL_UNIT_NOT_READY 0x4 |
72 | #define LOGICAL_UNIT_COMMUNICATION_FAILURE 0x8 |
73 | #define UNRECOVERED_READ_ERR 0x11 |
74 | #define PARAMETER_LIST_LENGTH_ERR 0x1a |
75 | #define INVALID_OPCODE 0x20 |
76 | #define LBA_OUT_OF_RANGE 0x21 |
77 | #define INVALID_FIELD_IN_CDB 0x24 |
78 | #define INVALID_FIELD_IN_PARAM_LIST 0x26 |
79 | #define WRITE_PROTECTED 0x27 |
80 | #define UA_RESET_ASC 0x29 |
81 | #define UA_CHANGED_ASC 0x2a |
82 | #define TARGET_CHANGED_ASC 0x3f |
83 | #define LUNS_CHANGED_ASCQ 0x0e |
84 | #define INSUFF_RES_ASC 0x55 |
85 | #define INSUFF_RES_ASCQ 0x3 |
86 | #define POWER_ON_RESET_ASCQ 0x0 |
87 | #define BUS_RESET_ASCQ 0x2 /* scsi bus reset occurred */ |
88 | #define MODE_CHANGED_ASCQ 0x1 /* mode parameters changed */ |
89 | #define CAPACITY_CHANGED_ASCQ 0x9 |
90 | #define SAVING_PARAMS_UNSUP 0x39 |
91 | #define TRANSPORT_PROBLEM 0x4b |
92 | #define THRESHOLD_EXCEEDED 0x5d |
93 | #define LOW_POWER_COND_ON 0x5e |
94 | #define MISCOMPARE_VERIFY_ASC 0x1d |
95 | #define MICROCODE_CHANGED_ASCQ 0x1 /* with TARGET_CHANGED_ASC */ |
96 | #define MICROCODE_CHANGED_WO_RESET_ASCQ 0x16 |
97 | #define WRITE_ERROR_ASC 0xc |
98 | |
99 | /* Additional Sense Code Qualifier (ASCQ) */ |
100 | #define ACK_NAK_TO 0x3 |
101 | |
102 | /* Default values for driver parameters */ |
103 | #define DEF_NUM_HOST 1 |
104 | #define DEF_NUM_TGTS 1 |
105 | #define DEF_MAX_LUNS 1 |
106 | /* With these defaults, this driver will make 1 host with 1 target |
107 | * (id 0) containing 1 logical unit (lun 0). That is 1 device. |
108 | */ |
109 | #define DEF_ATO 1 |
110 | #define DEF_CDB_LEN 10 |
111 | #define DEF_JDELAY 1 /* if > 0 unit is a jiffy */ |
112 | #define DEF_DEV_SIZE_MB 8 |
113 | #define DEF_DIF 0 |
114 | #define DEF_DIX 0 |
115 | #define DEF_D_SENSE 0 |
116 | #define DEF_EVERY_NTH 0 |
117 | #define DEF_FAKE_RW 0 |
118 | #define DEF_GUARD 0 |
119 | #define DEF_HOST_LOCK 0 |
120 | #define DEF_LBPU 0 |
121 | #define DEF_LBPWS 0 |
122 | #define DEF_LBPWS10 0 |
123 | #define DEF_LBPRZ 1 |
124 | #define DEF_LOWEST_ALIGNED 0 |
125 | #define DEF_NDELAY 0 /* if > 0 unit is a nanosecond */ |
126 | #define DEF_NO_LUN_0 0 |
127 | #define DEF_NUM_PARTS 0 |
128 | #define DEF_OPTS 0 |
129 | #define DEF_OPT_BLKS 1024 |
130 | #define DEF_PHYSBLK_EXP 0 |
131 | #define DEF_OPT_XFERLEN_EXP 0 |
132 | #define DEF_PTYPE TYPE_DISK |
133 | #define DEF_REMOVABLE false |
134 | #define DEF_SCSI_LEVEL 7 /* INQUIRY, byte2 [6->SPC-4; 7->SPC-5] */ |
135 | #define DEF_SECTOR_SIZE 512 |
136 | #define DEF_UNMAP_ALIGNMENT 0 |
137 | #define DEF_UNMAP_GRANULARITY 1 |
138 | #define DEF_UNMAP_MAX_BLOCKS 0xFFFFFFFF |
139 | #define DEF_UNMAP_MAX_DESC 256 |
140 | #define DEF_VIRTUAL_GB 0 |
141 | #define DEF_VPD_USE_HOSTNO 1 |
142 | #define DEF_WRITESAME_LENGTH 0xFFFF |
143 | #define DEF_STRICT 0 |
144 | #define DEF_STATISTICS false |
145 | #define DEF_SUBMIT_QUEUES 1 |
146 | #define DEF_UUID_CTL 0 |
147 | #define JDELAY_OVERRIDDEN -9999 |
148 | |
149 | #define SDEBUG_LUN_0_VAL 0 |
150 | |
151 | /* bit mask values for sdebug_opts */ |
152 | #define SDEBUG_OPT_NOISE 1 |
153 | #define SDEBUG_OPT_MEDIUM_ERR 2 |
154 | #define SDEBUG_OPT_TIMEOUT 4 |
155 | #define SDEBUG_OPT_RECOVERED_ERR 8 |
156 | #define SDEBUG_OPT_TRANSPORT_ERR 16 |
157 | #define SDEBUG_OPT_DIF_ERR 32 |
158 | #define SDEBUG_OPT_DIX_ERR 64 |
159 | #define SDEBUG_OPT_MAC_TIMEOUT 128 |
160 | #define SDEBUG_OPT_SHORT_TRANSFER 0x100 |
161 | #define SDEBUG_OPT_Q_NOISE 0x200 |
162 | #define SDEBUG_OPT_ALL_TSF 0x400 |
163 | #define SDEBUG_OPT_RARE_TSF 0x800 |
164 | #define SDEBUG_OPT_N_WCE 0x1000 |
165 | #define SDEBUG_OPT_RESET_NOISE 0x2000 |
166 | #define SDEBUG_OPT_NO_CDB_NOISE 0x4000 |
167 | #define SDEBUG_OPT_HOST_BUSY 0x8000 |
168 | #define SDEBUG_OPT_CMD_ABORT 0x10000 |
169 | #define SDEBUG_OPT_ALL_NOISE (SDEBUG_OPT_NOISE | SDEBUG_OPT_Q_NOISE | \ |
170 | SDEBUG_OPT_RESET_NOISE) |
171 | #define SDEBUG_OPT_ALL_INJECTING (SDEBUG_OPT_RECOVERED_ERR | \ |
172 | SDEBUG_OPT_TRANSPORT_ERR | \ |
173 | SDEBUG_OPT_DIF_ERR | SDEBUG_OPT_DIX_ERR | \ |
174 | SDEBUG_OPT_SHORT_TRANSFER | \ |
175 | SDEBUG_OPT_HOST_BUSY | \ |
176 | SDEBUG_OPT_CMD_ABORT) |
177 | /* When "every_nth" > 0 then modulo "every_nth" commands: |
178 | * - a missing response is simulated if SDEBUG_OPT_TIMEOUT is set |
179 | * - a RECOVERED_ERROR is simulated on successful read and write |
180 | * commands if SDEBUG_OPT_RECOVERED_ERR is set. |
181 | * - a TRANSPORT_ERROR is simulated on successful read and write |
182 | * commands if SDEBUG_OPT_TRANSPORT_ERR is set. |
183 | * - similarly for DIF_ERR, DIX_ERR, SHORT_TRANSFER, HOST_BUSY and |
184 | * CMD_ABORT |
185 | * |
186 | * When "every_nth" < 0 then after "- every_nth" commands the selected |
187 | * error will be injected. The error will be injected on every subsequent |
188 | * command until some other action occurs; for example, the user writing |
189 | * a new value (other than -1 or 1) to every_nth: |
190 | * echo 0 > /sys/bus/pseudo/drivers/scsi_debug/every_nth |
191 | */ |
192 | |
193 | /* As indicated in SAM-5 and SPC-4 Unit Attentions (UAs) are returned in |
194 | * priority order. In the subset implemented here lower numbers have higher |
195 | * priority. The UA numbers should be a sequence starting from 0 with |
196 | * SDEBUG_NUM_UAS being 1 higher than the highest numbered UA. */ |
197 | #define SDEBUG_UA_POR 0 /* Power on, reset, or bus device reset */ |
198 | #define SDEBUG_UA_BUS_RESET 1 |
199 | #define SDEBUG_UA_MODE_CHANGED 2 |
200 | #define SDEBUG_UA_CAPACITY_CHANGED 3 |
201 | #define SDEBUG_UA_LUNS_CHANGED 4 |
202 | #define SDEBUG_UA_MICROCODE_CHANGED 5 /* simulate firmware change */ |
203 | #define SDEBUG_UA_MICROCODE_CHANGED_WO_RESET 6 |
204 | #define SDEBUG_NUM_UAS 7 |
205 | |
206 | /* when 1==SDEBUG_OPT_MEDIUM_ERR, a medium error is simulated at this |
207 | * sector on read commands: */ |
208 | #define OPT_MEDIUM_ERR_ADDR 0x1234 /* that's sector 4660 in decimal */ |
209 | #define OPT_MEDIUM_ERR_NUM 10 /* number of consecutive medium errs */ |
210 | |
211 | /* If REPORT LUNS has luns >= 256 it can choose "flat space" (value 1) |
212 | * or "peripheral device" addressing (value 0) */ |
213 | #define SAM2_LUN_ADDRESS_METHOD 0 |
214 | |
215 | /* SDEBUG_CANQUEUE is the maximum number of commands that can be queued |
216 | * (for response) per submit queue at one time. Can be reduced by max_queue |
217 | * option. Command responses are not queued when jdelay=0 and ndelay=0. The |
218 | * per-device DEF_CMD_PER_LUN can be changed via sysfs: |
219 | * /sys/class/scsi_device/<h:c:t:l>/device/queue_depth |
220 | * but cannot exceed SDEBUG_CANQUEUE . |
221 | */ |
222 | #define SDEBUG_CANQUEUE_WORDS 3 /* a WORD is bits in a long */ |
223 | #define SDEBUG_CANQUEUE (SDEBUG_CANQUEUE_WORDS * BITS_PER_LONG) |
224 | #define DEF_CMD_PER_LUN 255 |
225 | |
226 | #define F_D_IN 1 |
227 | #define F_D_OUT 2 |
228 | #define F_D_OUT_MAYBE 4 /* WRITE SAME, NDOB bit */ |
229 | #define F_D_UNKN 8 |
230 | #define F_RL_WLUN_OK 0x10 |
231 | #define F_SKIP_UA 0x20 |
232 | #define F_DELAY_OVERR 0x40 |
233 | #define F_SA_LOW 0x80 /* cdb byte 1, bits 4 to 0 */ |
234 | #define F_SA_HIGH 0x100 /* as used by variable length cdbs */ |
235 | #define F_INV_OP 0x200 |
236 | #define F_FAKE_RW 0x400 |
237 | #define F_M_ACCESS 0x800 /* media access */ |
238 | #define F_SSU_DELAY 0x1000 |
239 | #define F_SYNC_DELAY 0x2000 |
240 | |
241 | #define FF_RESPOND (F_RL_WLUN_OK | F_SKIP_UA | F_DELAY_OVERR) |
242 | #define FF_MEDIA_IO (F_M_ACCESS | F_FAKE_RW) |
243 | #define FF_SA (F_SA_HIGH | F_SA_LOW) |
244 | #define F_LONG_DELAY (F_SSU_DELAY | F_SYNC_DELAY) |
245 | |
246 | #define SDEBUG_MAX_PARTS 4 |
247 | |
248 | #define SDEBUG_MAX_CMD_LEN 32 |
249 | |
250 | |
251 | struct sdebug_dev_info { |
252 | struct list_head dev_list; |
253 | unsigned int channel; |
254 | unsigned int target; |
255 | u64 lun; |
256 | uuid_t lu_name; |
257 | struct sdebug_host_info *sdbg_host; |
258 | unsigned long uas_bm[1]; |
259 | atomic_t num_in_q; |
260 | atomic_t stopped; |
261 | bool used; |
262 | }; |
263 | |
264 | struct sdebug_host_info { |
265 | struct list_head host_list; |
266 | struct Scsi_Host *shost; |
267 | struct device dev; |
268 | struct list_head dev_info_list; |
269 | }; |
270 | |
271 | #define to_sdebug_host(d) \ |
272 | container_of(d, struct sdebug_host_info, dev) |
273 | |
274 | enum sdeb_defer_type {SDEB_DEFER_NONE = 0, SDEB_DEFER_HRT = 1, |
275 | SDEB_DEFER_WQ = 2}; |
276 | |
277 | struct sdebug_defer { |
278 | struct hrtimer hrt; |
279 | struct execute_work ew; |
280 | int sqa_idx; /* index of sdebug_queue array */ |
281 | int qc_idx; /* index of sdebug_queued_cmd array within sqa_idx */ |
282 | int issuing_cpu; |
283 | bool init_hrt; |
284 | bool init_wq; |
285 | bool aborted; /* true when blk_abort_request() already called */ |
286 | enum sdeb_defer_type defer_t; |
287 | }; |
288 | |
289 | struct sdebug_queued_cmd { |
290 | /* corresponding bit set in in_use_bm[] in owning struct sdebug_queue |
291 | * instance indicates this slot is in use. |
292 | */ |
293 | struct sdebug_defer *sd_dp; |
294 | struct scsi_cmnd *a_cmnd; |
295 | unsigned int inj_recovered:1; |
296 | unsigned int inj_transport:1; |
297 | unsigned int inj_dif:1; |
298 | unsigned int inj_dix:1; |
299 | unsigned int inj_short:1; |
300 | unsigned int inj_host_busy:1; |
301 | unsigned int inj_cmd_abort:1; |
302 | }; |
303 | |
304 | struct sdebug_queue { |
305 | struct sdebug_queued_cmd qc_arr[SDEBUG_CANQUEUE]; |
306 | unsigned long in_use_bm[SDEBUG_CANQUEUE_WORDS]; |
307 | spinlock_t qc_lock; |
308 | atomic_t blocked; /* to temporarily stop more being queued */ |
309 | }; |
310 | |
311 | static atomic_t sdebug_cmnd_count; /* number of incoming commands */ |
312 | static atomic_t sdebug_completions; /* count of deferred completions */ |
313 | static atomic_t sdebug_miss_cpus; /* submission + completion cpus differ */ |
314 | static atomic_t sdebug_a_tsf; /* 'almost task set full' counter */ |
315 | |
316 | struct opcode_info_t { |
317 | u8 num_attached; /* 0 if this is it (i.e. a leaf); use 0xff */ |
318 | /* for terminating element */ |
319 | u8 opcode; /* if num_attached > 0, preferred */ |
320 | u16 sa; /* service action */ |
321 | u32 flags; /* OR-ed set of SDEB_F_* */ |
322 | int (*pfp)(struct scsi_cmnd *, struct sdebug_dev_info *); |
323 | const struct opcode_info_t *arrp; /* num_attached elements or NULL */ |
324 | u8 len_mask[16]; /* len_mask[0]-->cdb_len, then mask for cdb */ |
325 | /* 1 to min(cdb_len, 15); ignore cdb[15...] */ |
326 | }; |
327 | |
328 | /* SCSI opcodes (first byte of cdb) of interest mapped onto these indexes */ |
329 | enum sdeb_opcode_index { |
330 | SDEB_I_INVALID_OPCODE = 0, |
331 | SDEB_I_INQUIRY = 1, |
332 | SDEB_I_REPORT_LUNS = 2, |
333 | SDEB_I_REQUEST_SENSE = 3, |
334 | SDEB_I_TEST_UNIT_READY = 4, |
335 | SDEB_I_MODE_SENSE = 5, /* 6, 10 */ |
336 | SDEB_I_MODE_SELECT = 6, /* 6, 10 */ |
337 | SDEB_I_LOG_SENSE = 7, |
338 | SDEB_I_READ_CAPACITY = 8, /* 10; 16 is in SA_IN(16) */ |
339 | SDEB_I_READ = 9, /* 6, 10, 12, 16 */ |
340 | SDEB_I_WRITE = 10, /* 6, 10, 12, 16 */ |
341 | SDEB_I_START_STOP = 11, |
342 | SDEB_I_SERV_ACT_IN_16 = 12, /* add ...SERV_ACT_IN_12 if needed */ |
343 | SDEB_I_SERV_ACT_OUT_16 = 13, /* add ...SERV_ACT_OUT_12 if needed */ |
344 | SDEB_I_MAINT_IN = 14, |
345 | SDEB_I_MAINT_OUT = 15, |
346 | SDEB_I_VERIFY = 16, /* 10 only */ |
347 | SDEB_I_VARIABLE_LEN = 17, /* READ(32), WRITE(32), WR_SCAT(32) */ |
348 | SDEB_I_RESERVE = 18, /* 6, 10 */ |
349 | SDEB_I_RELEASE = 19, /* 6, 10 */ |
350 | SDEB_I_ALLOW_REMOVAL = 20, /* PREVENT ALLOW MEDIUM REMOVAL */ |
351 | SDEB_I_REZERO_UNIT = 21, /* REWIND in SSC */ |
352 | SDEB_I_ATA_PT = 22, /* 12, 16 */ |
353 | SDEB_I_SEND_DIAG = 23, |
354 | SDEB_I_UNMAP = 24, |
355 | SDEB_I_WRITE_BUFFER = 25, |
356 | SDEB_I_WRITE_SAME = 26, /* 10, 16 */ |
357 | SDEB_I_SYNC_CACHE = 27, /* 10, 16 */ |
358 | SDEB_I_COMP_WRITE = 28, |
359 | SDEB_I_LAST_ELEMENT = 29, /* keep this last (previous + 1) */ |
360 | }; |
361 | |
362 | |
363 | static const unsigned char opcode_ind_arr[256] = { |
364 | /* 0x0; 0x0->0x1f: 6 byte cdbs */ |
365 | SDEB_I_TEST_UNIT_READY, SDEB_I_REZERO_UNIT, 0, SDEB_I_REQUEST_SENSE, |
366 | 0, 0, 0, 0, |
367 | SDEB_I_READ, 0, SDEB_I_WRITE, 0, 0, 0, 0, 0, |
368 | 0, 0, SDEB_I_INQUIRY, 0, 0, SDEB_I_MODE_SELECT, SDEB_I_RESERVE, |
369 | SDEB_I_RELEASE, |
370 | 0, 0, SDEB_I_MODE_SENSE, SDEB_I_START_STOP, 0, SDEB_I_SEND_DIAG, |
371 | SDEB_I_ALLOW_REMOVAL, 0, |
372 | /* 0x20; 0x20->0x3f: 10 byte cdbs */ |
373 | 0, 0, 0, 0, 0, SDEB_I_READ_CAPACITY, 0, 0, |
374 | SDEB_I_READ, 0, SDEB_I_WRITE, 0, 0, 0, 0, SDEB_I_VERIFY, |
375 | 0, 0, 0, 0, 0, SDEB_I_SYNC_CACHE, 0, 0, |
376 | 0, 0, 0, SDEB_I_WRITE_BUFFER, 0, 0, 0, 0, |
377 | /* 0x40; 0x40->0x5f: 10 byte cdbs */ |
378 | 0, SDEB_I_WRITE_SAME, SDEB_I_UNMAP, 0, 0, 0, 0, 0, |
379 | 0, 0, 0, 0, 0, SDEB_I_LOG_SENSE, 0, 0, |
380 | 0, 0, 0, 0, 0, SDEB_I_MODE_SELECT, SDEB_I_RESERVE, |
381 | SDEB_I_RELEASE, |
382 | 0, 0, SDEB_I_MODE_SENSE, 0, 0, 0, 0, 0, |
383 | /* 0x60; 0x60->0x7d are reserved, 0x7e is "extended cdb" */ |
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, |
386 | 0, SDEB_I_VARIABLE_LEN, |
387 | /* 0x80; 0x80->0x9f: 16 byte cdbs */ |
388 | 0, 0, 0, 0, 0, SDEB_I_ATA_PT, 0, 0, |
389 | SDEB_I_READ, SDEB_I_COMP_WRITE, SDEB_I_WRITE, 0, 0, 0, 0, 0, |
390 | 0, SDEB_I_SYNC_CACHE, 0, SDEB_I_WRITE_SAME, 0, 0, 0, 0, |
391 | 0, 0, 0, 0, 0, 0, SDEB_I_SERV_ACT_IN_16, SDEB_I_SERV_ACT_OUT_16, |
392 | /* 0xa0; 0xa0->0xbf: 12 byte cdbs */ |
393 | SDEB_I_REPORT_LUNS, SDEB_I_ATA_PT, 0, SDEB_I_MAINT_IN, |
394 | SDEB_I_MAINT_OUT, 0, 0, 0, |
395 | SDEB_I_READ, 0 /* SDEB_I_SERV_ACT_OUT_12 */, SDEB_I_WRITE, |
396 | 0 /* SDEB_I_SERV_ACT_IN_12 */, 0, 0, 0, 0, |
397 | 0, 0, 0, 0, 0, 0, 0, 0, |
398 | 0, 0, 0, 0, 0, 0, 0, 0, |
399 | /* 0xc0; 0xc0->0xff: vendor specific */ |
400 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
401 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
402 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
403 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
404 | }; |
405 | |
406 | /* |
407 | * The following "response" functions return the SCSI mid-level's 4 byte |
408 | * tuple-in-an-int. To handle commands with an IMMED bit, for a faster |
409 | * command completion, they can mask their return value with |
410 | * SDEG_RES_IMMED_MASK . |
411 | */ |
412 | #define SDEG_RES_IMMED_MASK 0x40000000 |
413 | |
414 | static int resp_inquiry(struct scsi_cmnd *, struct sdebug_dev_info *); |
415 | static int resp_report_luns(struct scsi_cmnd *, struct sdebug_dev_info *); |
416 | static int resp_requests(struct scsi_cmnd *, struct sdebug_dev_info *); |
417 | static int resp_mode_sense(struct scsi_cmnd *, struct sdebug_dev_info *); |
418 | static int resp_mode_select(struct scsi_cmnd *, struct sdebug_dev_info *); |
419 | static int resp_log_sense(struct scsi_cmnd *, struct sdebug_dev_info *); |
420 | static int resp_readcap(struct scsi_cmnd *, struct sdebug_dev_info *); |
421 | static int resp_read_dt0(struct scsi_cmnd *, struct sdebug_dev_info *); |
422 | static int resp_write_dt0(struct scsi_cmnd *, struct sdebug_dev_info *); |
423 | static int resp_write_scat(struct scsi_cmnd *, struct sdebug_dev_info *); |
424 | static int resp_start_stop(struct scsi_cmnd *, struct sdebug_dev_info *); |
425 | static int resp_readcap16(struct scsi_cmnd *, struct sdebug_dev_info *); |
426 | static int resp_get_lba_status(struct scsi_cmnd *, struct sdebug_dev_info *); |
427 | static int resp_report_tgtpgs(struct scsi_cmnd *, struct sdebug_dev_info *); |
428 | static int resp_unmap(struct scsi_cmnd *, struct sdebug_dev_info *); |
429 | static int resp_rsup_opcodes(struct scsi_cmnd *, struct sdebug_dev_info *); |
430 | static int resp_rsup_tmfs(struct scsi_cmnd *, struct sdebug_dev_info *); |
431 | static int resp_write_same_10(struct scsi_cmnd *, struct sdebug_dev_info *); |
432 | static int resp_write_same_16(struct scsi_cmnd *, struct sdebug_dev_info *); |
433 | static int resp_comp_write(struct scsi_cmnd *, struct sdebug_dev_info *); |
434 | static int resp_write_buffer(struct scsi_cmnd *, struct sdebug_dev_info *); |
435 | static int resp_sync_cache(struct scsi_cmnd *, struct sdebug_dev_info *); |
436 | |
437 | /* |
438 | * The following are overflow arrays for cdbs that "hit" the same index in |
439 | * the opcode_info_arr array. The most time sensitive (or commonly used) cdb |
440 | * should be placed in opcode_info_arr[], the others should be placed here. |
441 | */ |
442 | static const struct opcode_info_t msense_iarr[] = { |
443 | {0, 0x1a, 0, F_D_IN, NULL, NULL, |
444 | {6, 0xe8, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} }, |
445 | }; |
446 | |
447 | static const struct opcode_info_t mselect_iarr[] = { |
448 | {0, 0x15, 0, F_D_OUT, NULL, NULL, |
449 | {6, 0xf1, 0, 0, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} }, |
450 | }; |
451 | |
452 | static const struct opcode_info_t read_iarr[] = { |
453 | {0, 0x28, 0, F_D_IN | FF_MEDIA_IO, resp_read_dt0, NULL,/* READ(10) */ |
454 | {10, 0xff, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xff, 0xff, 0xc7, 0, 0, |
455 | 0, 0, 0, 0} }, |
456 | {0, 0x8, 0, F_D_IN | FF_MEDIA_IO, resp_read_dt0, NULL, /* READ(6) */ |
457 | {6, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} }, |
458 | {0, 0xa8, 0, F_D_IN | FF_MEDIA_IO, resp_read_dt0, NULL,/* READ(12) */ |
459 | {12, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xbf, |
460 | 0xc7, 0, 0, 0, 0} }, |
461 | }; |
462 | |
463 | static const struct opcode_info_t write_iarr[] = { |
464 | {0, 0x2a, 0, F_D_OUT | FF_MEDIA_IO, resp_write_dt0, /* WRITE(10) */ |
465 | NULL, {10, 0xfb, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xff, 0xff, 0xc7, |
466 | 0, 0, 0, 0, 0, 0} }, |
467 | {0, 0xa, 0, F_D_OUT | FF_MEDIA_IO, resp_write_dt0, /* WRITE(6) */ |
468 | NULL, {6, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, |
469 | 0, 0, 0} }, |
470 | {0, 0xaa, 0, F_D_OUT | FF_MEDIA_IO, resp_write_dt0, /* WRITE(12) */ |
471 | NULL, {12, 0xfb, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, |
472 | 0xbf, 0xc7, 0, 0, 0, 0} }, |
473 | }; |
474 | |
475 | static const struct opcode_info_t sa_in_16_iarr[] = { |
476 | {0, 0x9e, 0x12, F_SA_LOW | F_D_IN, resp_get_lba_status, NULL, |
477 | {16, 0x12, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, |
478 | 0xff, 0xff, 0xff, 0, 0xc7} }, /* GET LBA STATUS(16) */ |
479 | }; |
480 | |
481 | static const struct opcode_info_t vl_iarr[] = { /* VARIABLE LENGTH */ |
482 | {0, 0x7f, 0xb, F_SA_HIGH | F_D_OUT | FF_MEDIA_IO, resp_write_dt0, |
483 | NULL, {32, 0xc7, 0, 0, 0, 0, 0x3f, 0x18, 0x0, 0xb, 0xfa, |
484 | 0, 0xff, 0xff, 0xff, 0xff} }, /* WRITE(32) */ |
485 | {0, 0x7f, 0x11, F_SA_HIGH | F_D_OUT | FF_MEDIA_IO, resp_write_scat, |
486 | NULL, {32, 0xc7, 0, 0, 0, 0, 0x3f, 0x18, 0x0, 0x11, 0xf8, |
487 | 0, 0xff, 0xff, 0x0, 0x0} }, /* WRITE SCATTERED(32) */ |
488 | }; |
489 | |
490 | static const struct opcode_info_t maint_in_iarr[] = { /* MAINT IN */ |
491 | {0, 0xa3, 0xc, F_SA_LOW | F_D_IN, resp_rsup_opcodes, NULL, |
492 | {12, 0xc, 0x87, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0, |
493 | 0xc7, 0, 0, 0, 0} }, /* REPORT SUPPORTED OPERATION CODES */ |
494 | {0, 0xa3, 0xd, F_SA_LOW | F_D_IN, resp_rsup_tmfs, NULL, |
495 | {12, 0xd, 0x80, 0, 0, 0, 0xff, 0xff, 0xff, 0xff, 0, 0xc7, 0, 0, |
496 | 0, 0} }, /* REPORTED SUPPORTED TASK MANAGEMENT FUNCTIONS */ |
497 | }; |
498 | |
499 | static const struct opcode_info_t write_same_iarr[] = { |
500 | {0, 0x93, 0, F_D_OUT_MAYBE | FF_MEDIA_IO, resp_write_same_16, NULL, |
501 | {16, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, |
502 | 0xff, 0xff, 0xff, 0x3f, 0xc7} }, /* WRITE SAME(16) */ |
503 | }; |
504 | |
505 | static const struct opcode_info_t reserve_iarr[] = { |
506 | {0, 0x16, 0, F_D_OUT, NULL, NULL, /* RESERVE(6) */ |
507 | {6, 0x1f, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} }, |
508 | }; |
509 | |
510 | static const struct opcode_info_t release_iarr[] = { |
511 | {0, 0x17, 0, F_D_OUT, NULL, NULL, /* RELEASE(6) */ |
512 | {6, 0x1f, 0xff, 0, 0, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} }, |
513 | }; |
514 | |
515 | static const struct opcode_info_t sync_cache_iarr[] = { |
516 | {0, 0x91, 0, F_SYNC_DELAY | F_M_ACCESS, resp_sync_cache, NULL, |
517 | {16, 0x6, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, |
518 | 0xff, 0xff, 0xff, 0xff, 0x3f, 0xc7} }, /* SYNC_CACHE (16) */ |
519 | }; |
520 | |
521 | |
522 | /* This array is accessed via SDEB_I_* values. Make sure all are mapped, |
523 | * plus the terminating elements for logic that scans this table such as |
524 | * REPORT SUPPORTED OPERATION CODES. */ |
525 | static const struct opcode_info_t opcode_info_arr[SDEB_I_LAST_ELEMENT + 1] = { |
526 | /* 0 */ |
527 | {0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL, /* unknown opcodes */ |
528 | {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} }, |
529 | {0, 0x12, 0, FF_RESPOND | F_D_IN, resp_inquiry, NULL, /* INQUIRY */ |
530 | {6, 0xe3, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} }, |
531 | {0, 0xa0, 0, FF_RESPOND | F_D_IN, resp_report_luns, NULL, |
532 | {12, 0xe3, 0xff, 0, 0, 0, 0xff, 0xff, 0xff, 0xff, 0, 0xc7, 0, 0, |
533 | 0, 0} }, /* REPORT LUNS */ |
534 | {0, 0x3, 0, FF_RESPOND | F_D_IN, resp_requests, NULL, |
535 | {6, 0xe1, 0, 0, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} }, |
536 | {0, 0x0, 0, F_M_ACCESS | F_RL_WLUN_OK, NULL, NULL,/* TEST UNIT READY */ |
537 | {6, 0, 0, 0, 0, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} }, |
538 | /* 5 */ |
539 | {ARRAY_SIZE(msense_iarr), 0x5a, 0, F_D_IN, /* MODE SENSE(10) */ |
540 | resp_mode_sense, msense_iarr, {10, 0xf8, 0xff, 0xff, 0, 0, 0, |
541 | 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0} }, |
542 | {ARRAY_SIZE(mselect_iarr), 0x55, 0, F_D_OUT, /* MODE SELECT(10) */ |
543 | resp_mode_select, mselect_iarr, {10, 0xf1, 0, 0, 0, 0, 0, 0xff, |
544 | 0xff, 0xc7, 0, 0, 0, 0, 0, 0} }, |
545 | {0, 0x4d, 0, F_D_IN, resp_log_sense, NULL, /* LOG SENSE */ |
546 | {10, 0xe3, 0xff, 0xff, 0, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, |
547 | 0, 0, 0} }, |
548 | {0, 0x25, 0, F_D_IN, resp_readcap, NULL, /* READ CAPACITY(10) */ |
549 | {10, 0xe1, 0xff, 0xff, 0xff, 0xff, 0, 0, 0x1, 0xc7, 0, 0, 0, 0, |
550 | 0, 0} }, |
551 | {ARRAY_SIZE(read_iarr), 0x88, 0, F_D_IN | FF_MEDIA_IO, /* READ(16) */ |
552 | resp_read_dt0, read_iarr, {16, 0xfe, 0xff, 0xff, 0xff, 0xff, |
553 | 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc7} }, |
554 | /* 10 */ |
555 | {ARRAY_SIZE(write_iarr), 0x8a, 0, F_D_OUT | FF_MEDIA_IO, |
556 | resp_write_dt0, write_iarr, /* WRITE(16) */ |
557 | {16, 0xfa, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, |
558 | 0xff, 0xff, 0xff, 0xff, 0xff, 0xc7} }, |
559 | {0, 0x1b, 0, F_SSU_DELAY, resp_start_stop, NULL,/* START STOP UNIT */ |
560 | {6, 0x1, 0, 0xf, 0xf7, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} }, |
561 | {ARRAY_SIZE(sa_in_16_iarr), 0x9e, 0x10, F_SA_LOW | F_D_IN, |
562 | resp_readcap16, sa_in_16_iarr, /* SA_IN(16), READ CAPACITY(16) */ |
563 | {16, 0x10, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, |
564 | 0xff, 0xff, 0xff, 0xff, 0x1, 0xc7} }, |
565 | {0, 0x9f, 0x12, F_SA_LOW | F_D_OUT | FF_MEDIA_IO, resp_write_scat, |
566 | NULL, {16, 0x12, 0xf9, 0x0, 0xff, 0xff, 0, 0, 0xff, 0xff, 0xff, |
567 | 0xff, 0xff, 0xff, 0xff, 0xc7} }, /* SA_OUT(16), WRITE SCAT(16) */ |
568 | {ARRAY_SIZE(maint_in_iarr), 0xa3, 0xa, F_SA_LOW | F_D_IN, |
569 | resp_report_tgtpgs, /* MAINT IN, REPORT TARGET PORT GROUPS */ |
570 | maint_in_iarr, {12, 0xea, 0, 0, 0, 0, 0xff, 0xff, 0xff, |
571 | 0xff, 0, 0xc7, 0, 0, 0, 0} }, |
572 | /* 15 */ |
573 | {0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL, /* MAINT OUT */ |
574 | {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} }, |
575 | {0, 0x2f, 0, F_D_OUT_MAYBE | FF_MEDIA_IO, NULL, NULL, /* VERIFY(10) */ |
576 | {10, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc7, |
577 | 0, 0, 0, 0, 0, 0} }, |
578 | {ARRAY_SIZE(vl_iarr), 0x7f, 0x9, F_SA_HIGH | F_D_IN | FF_MEDIA_IO, |
579 | resp_read_dt0, vl_iarr, /* VARIABLE LENGTH, READ(32) */ |
580 | {32, 0xc7, 0, 0, 0, 0, 0x3f, 0x18, 0x0, 0x9, 0xfe, 0, 0xff, 0xff, |
581 | 0xff, 0xff} }, |
582 | {ARRAY_SIZE(reserve_iarr), 0x56, 0, F_D_OUT, |
583 | NULL, reserve_iarr, /* RESERVE(10) <no response function> */ |
584 | {10, 0xff, 0xff, 0xff, 0, 0, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, |
585 | 0} }, |
586 | {ARRAY_SIZE(release_iarr), 0x57, 0, F_D_OUT, |
587 | NULL, release_iarr, /* RELEASE(10) <no response function> */ |
588 | {10, 0x13, 0xff, 0xff, 0, 0, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, |
589 | 0} }, |
590 | /* 20 */ |
591 | {0, 0x1e, 0, 0, NULL, NULL, /* ALLOW REMOVAL */ |
592 | {6, 0, 0, 0, 0x3, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} }, |
593 | {0, 0x1, 0, 0, resp_start_stop, NULL, /* REWIND ?? */ |
594 | {6, 0x1, 0, 0, 0, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} }, |
595 | {0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL, /* ATA_PT */ |
596 | {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} }, |
597 | {0, 0x1d, F_D_OUT, 0, NULL, NULL, /* SEND DIAGNOSTIC */ |
598 | {6, 0xf7, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} }, |
599 | {0, 0x42, 0, F_D_OUT | FF_MEDIA_IO, resp_unmap, NULL, /* UNMAP */ |
600 | {10, 0x1, 0, 0, 0, 0, 0x3f, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0} }, |
601 | /* 25 */ |
602 | {0, 0x3b, 0, F_D_OUT_MAYBE, resp_write_buffer, NULL, |
603 | {10, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0, |
604 | 0, 0, 0, 0} }, /* WRITE_BUFFER */ |
605 | {ARRAY_SIZE(write_same_iarr), 0x41, 0, F_D_OUT_MAYBE | FF_MEDIA_IO, |
606 | resp_write_same_10, write_same_iarr, /* WRITE SAME(10) */ |
607 | {10, 0xff, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xff, 0xff, 0xc7, 0, |
608 | 0, 0, 0, 0, 0} }, |
609 | {ARRAY_SIZE(sync_cache_iarr), 0x35, 0, F_SYNC_DELAY | F_M_ACCESS, |
610 | resp_sync_cache, sync_cache_iarr, |
611 | {10, 0x7, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xff, 0xff, 0xc7, 0, 0, |
612 | 0, 0, 0, 0} }, /* SYNC_CACHE (10) */ |
613 | {0, 0x89, 0, F_D_OUT | FF_MEDIA_IO, resp_comp_write, NULL, |
614 | {16, 0xf8, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0, 0, |
615 | 0, 0xff, 0x3f, 0xc7} }, /* COMPARE AND WRITE */ |
616 | |
617 | /* 29 */ |
618 | {0xff, 0, 0, 0, NULL, NULL, /* terminating element */ |
619 | {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} }, |
620 | }; |
621 | |
622 | static int sdebug_add_host = DEF_NUM_HOST; |
623 | static int sdebug_ato = DEF_ATO; |
624 | static int sdebug_cdb_len = DEF_CDB_LEN; |
625 | static int sdebug_jdelay = DEF_JDELAY; /* if > 0 then unit is jiffies */ |
626 | static int sdebug_dev_size_mb = DEF_DEV_SIZE_MB; |
627 | static int sdebug_dif = DEF_DIF; |
628 | static int sdebug_dix = DEF_DIX; |
629 | static int sdebug_dsense = DEF_D_SENSE; |
630 | static int sdebug_every_nth = DEF_EVERY_NTH; |
631 | static int sdebug_fake_rw = DEF_FAKE_RW; |
632 | static unsigned int sdebug_guard = DEF_GUARD; |
633 | static int sdebug_lowest_aligned = DEF_LOWEST_ALIGNED; |
634 | static int sdebug_max_luns = DEF_MAX_LUNS; |
635 | static int sdebug_max_queue = SDEBUG_CANQUEUE; /* per submit queue */ |
636 | static unsigned int sdebug_medium_error_start = OPT_MEDIUM_ERR_ADDR; |
637 | static int sdebug_medium_error_count = OPT_MEDIUM_ERR_NUM; |
638 | static atomic_t retired_max_queue; /* if > 0 then was prior max_queue */ |
639 | static int sdebug_ndelay = DEF_NDELAY; /* if > 0 then unit is nanoseconds */ |
640 | static int sdebug_no_lun_0 = DEF_NO_LUN_0; |
641 | static int sdebug_no_uld; |
642 | static int sdebug_num_parts = DEF_NUM_PARTS; |
643 | static int sdebug_num_tgts = DEF_NUM_TGTS; /* targets per host */ |
644 | static int sdebug_opt_blks = DEF_OPT_BLKS; |
645 | static int sdebug_opts = DEF_OPTS; |
646 | static int sdebug_physblk_exp = DEF_PHYSBLK_EXP; |
647 | static int sdebug_opt_xferlen_exp = DEF_OPT_XFERLEN_EXP; |
648 | static int sdebug_ptype = DEF_PTYPE; /* SCSI peripheral device type */ |
649 | static int sdebug_scsi_level = DEF_SCSI_LEVEL; |
650 | static int sdebug_sector_size = DEF_SECTOR_SIZE; |
651 | static int sdebug_virtual_gb = DEF_VIRTUAL_GB; |
652 | static int sdebug_vpd_use_hostno = DEF_VPD_USE_HOSTNO; |
653 | static unsigned int sdebug_lbpu = DEF_LBPU; |
654 | static unsigned int sdebug_lbpws = DEF_LBPWS; |
655 | static unsigned int sdebug_lbpws10 = DEF_LBPWS10; |
656 | static unsigned int sdebug_lbprz = DEF_LBPRZ; |
657 | static unsigned int sdebug_unmap_alignment = DEF_UNMAP_ALIGNMENT; |
658 | static unsigned int sdebug_unmap_granularity = DEF_UNMAP_GRANULARITY; |
659 | static unsigned int sdebug_unmap_max_blocks = DEF_UNMAP_MAX_BLOCKS; |
660 | static unsigned int sdebug_unmap_max_desc = DEF_UNMAP_MAX_DESC; |
661 | static unsigned int sdebug_write_same_length = DEF_WRITESAME_LENGTH; |
662 | static int sdebug_uuid_ctl = DEF_UUID_CTL; |
663 | static bool sdebug_removable = DEF_REMOVABLE; |
664 | static bool sdebug_clustering; |
665 | static bool sdebug_host_lock = DEF_HOST_LOCK; |
666 | static bool sdebug_strict = DEF_STRICT; |
667 | static bool sdebug_any_injecting_opt; |
668 | static bool sdebug_verbose; |
669 | static bool have_dif_prot; |
670 | static bool write_since_sync; |
671 | static bool sdebug_statistics = DEF_STATISTICS; |
672 | static bool sdebug_wp; |
673 | |
674 | static unsigned int sdebug_store_sectors; |
675 | static sector_t sdebug_capacity; /* in sectors */ |
676 | |
677 | /* old BIOS stuff, kernel may get rid of them but some mode sense pages |
678 | may still need them */ |
679 | static int sdebug_heads; /* heads per disk */ |
680 | static int sdebug_cylinders_per; /* cylinders per surface */ |
681 | static int sdebug_sectors_per; /* sectors per cylinder */ |
682 | |
683 | static LIST_HEAD(sdebug_host_list); |
684 | static DEFINE_SPINLOCK(sdebug_host_list_lock); |
685 | |
686 | static unsigned char *fake_storep; /* ramdisk storage */ |
687 | static struct t10_pi_tuple *dif_storep; /* protection info */ |
688 | static void *map_storep; /* provisioning map */ |
689 | |
690 | static unsigned long map_size; |
691 | static int num_aborts; |
692 | static int num_dev_resets; |
693 | static int num_target_resets; |
694 | static int num_bus_resets; |
695 | static int num_host_resets; |
696 | static int dix_writes; |
697 | static int dix_reads; |
698 | static int dif_errors; |
699 | |
700 | static int submit_queues = DEF_SUBMIT_QUEUES; /* > 1 for multi-queue (mq) */ |
701 | static struct sdebug_queue *sdebug_q_arr; /* ptr to array of submit queues */ |
702 | |
703 | static DEFINE_RWLOCK(atomic_rw); |
704 | |
705 | static char sdebug_proc_name[] = MY_NAME; |
706 | static const char *my_name = MY_NAME; |
707 | |
708 | static struct bus_type pseudo_lld_bus; |
709 | |
710 | static struct device_driver sdebug_driverfs_driver = { |
711 | .name = sdebug_proc_name, |
712 | .bus = &pseudo_lld_bus, |
713 | }; |
714 | |
715 | static const int check_condition_result = |
716 | (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION; |
717 | |
718 | static const int illegal_condition_result = |
719 | (DRIVER_SENSE << 24) | (DID_ABORT << 16) | SAM_STAT_CHECK_CONDITION; |
720 | |
721 | static const int device_qfull_result = |
722 | (DID_OK << 16) | (COMMAND_COMPLETE << 8) | SAM_STAT_TASK_SET_FULL; |
723 | |
724 | |
725 | /* Only do the extra work involved in logical block provisioning if one or |
726 | * more of the lbpu, lbpws or lbpws10 parameters are given and we are doing |
727 | * real reads and writes (i.e. not skipping them for speed). |
728 | */ |
729 | static inline bool scsi_debug_lbp(void) |
730 | { |
731 | return 0 == sdebug_fake_rw && |
732 | (sdebug_lbpu || sdebug_lbpws || sdebug_lbpws10); |
733 | } |
734 | |
735 | static void *lba2fake_store(unsigned long long lba) |
736 | { |
737 | lba = do_div(lba, sdebug_store_sectors); |
738 | |
739 | return fake_storep + lba * sdebug_sector_size; |
740 | } |
741 | |
742 | static struct t10_pi_tuple *dif_store(sector_t sector) |
743 | { |
744 | sector = sector_div(sector, sdebug_store_sectors); |
745 | |
746 | return dif_storep + sector; |
747 | } |
748 | |
749 | static void sdebug_max_tgts_luns(void) |
750 | { |
751 | struct sdebug_host_info *sdbg_host; |
752 | struct Scsi_Host *hpnt; |
753 | |
754 | spin_lock(&sdebug_host_list_lock); |
755 | list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) { |
756 | hpnt = sdbg_host->shost; |
757 | if ((hpnt->this_id >= 0) && |
758 | (sdebug_num_tgts > hpnt->this_id)) |
759 | hpnt->max_id = sdebug_num_tgts + 1; |
760 | else |
761 | hpnt->max_id = sdebug_num_tgts; |
762 | /* sdebug_max_luns; */ |
763 | hpnt->max_lun = SCSI_W_LUN_REPORT_LUNS + 1; |
764 | } |
765 | spin_unlock(&sdebug_host_list_lock); |
766 | } |
767 | |
768 | enum sdeb_cmd_data {SDEB_IN_DATA = 0, SDEB_IN_CDB = 1}; |
769 | |
770 | /* Set in_bit to -1 to indicate no bit position of invalid field */ |
771 | static void mk_sense_invalid_fld(struct scsi_cmnd *scp, |
772 | enum sdeb_cmd_data c_d, |
773 | int in_byte, int in_bit) |
774 | { |
775 | unsigned char *sbuff; |
776 | u8 sks[4]; |
777 | int sl, asc; |
778 | |
779 | sbuff = scp->sense_buffer; |
780 | if (!sbuff) { |
781 | sdev_printk(KERN_ERR, scp->device, |
782 | "%s: sense_buffer is NULL\n" , __func__); |
783 | return; |
784 | } |
785 | asc = c_d ? INVALID_FIELD_IN_CDB : INVALID_FIELD_IN_PARAM_LIST; |
786 | memset(sbuff, 0, SCSI_SENSE_BUFFERSIZE); |
787 | scsi_build_sense_buffer(sdebug_dsense, sbuff, ILLEGAL_REQUEST, asc, 0); |
788 | memset(sks, 0, sizeof(sks)); |
789 | sks[0] = 0x80; |
790 | if (c_d) |
791 | sks[0] |= 0x40; |
792 | if (in_bit >= 0) { |
793 | sks[0] |= 0x8; |
794 | sks[0] |= 0x7 & in_bit; |
795 | } |
796 | put_unaligned_be16(in_byte, sks + 1); |
797 | if (sdebug_dsense) { |
798 | sl = sbuff[7] + 8; |
799 | sbuff[7] = sl; |
800 | sbuff[sl] = 0x2; |
801 | sbuff[sl + 1] = 0x6; |
802 | memcpy(sbuff + sl + 4, sks, 3); |
803 | } else |
804 | memcpy(sbuff + 15, sks, 3); |
805 | if (sdebug_verbose) |
806 | sdev_printk(KERN_INFO, scp->device, "%s: [sense_key,asc,ascq" |
807 | "]: [0x5,0x%x,0x0] %c byte=%d, bit=%d\n" , |
808 | my_name, asc, c_d ? 'C' : 'D', in_byte, in_bit); |
809 | } |
810 | |
811 | static void mk_sense_buffer(struct scsi_cmnd *scp, int key, int asc, int asq) |
812 | { |
813 | unsigned char *sbuff; |
814 | |
815 | sbuff = scp->sense_buffer; |
816 | if (!sbuff) { |
817 | sdev_printk(KERN_ERR, scp->device, |
818 | "%s: sense_buffer is NULL\n" , __func__); |
819 | return; |
820 | } |
821 | memset(sbuff, 0, SCSI_SENSE_BUFFERSIZE); |
822 | |
823 | scsi_build_sense_buffer(sdebug_dsense, sbuff, key, asc, asq); |
824 | |
825 | if (sdebug_verbose) |
826 | sdev_printk(KERN_INFO, scp->device, |
827 | "%s: [sense_key,asc,ascq]: [0x%x,0x%x,0x%x]\n" , |
828 | my_name, key, asc, asq); |
829 | } |
830 | |
831 | static void mk_sense_invalid_opcode(struct scsi_cmnd *scp) |
832 | { |
833 | mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_OPCODE, 0); |
834 | } |
835 | |
836 | static int scsi_debug_ioctl(struct scsi_device *dev, unsigned int cmd, |
837 | void __user *arg) |
838 | { |
839 | if (sdebug_verbose) { |
840 | if (0x1261 == cmd) |
841 | sdev_printk(KERN_INFO, dev, |
842 | "%s: BLKFLSBUF [0x1261]\n" , __func__); |
843 | else if (0x5331 == cmd) |
844 | sdev_printk(KERN_INFO, dev, |
845 | "%s: CDROM_GET_CAPABILITY [0x5331]\n" , |
846 | __func__); |
847 | else |
848 | sdev_printk(KERN_INFO, dev, "%s: cmd=0x%x\n" , |
849 | __func__, cmd); |
850 | } |
851 | return -EINVAL; |
852 | /* return -ENOTTY; // correct return but upsets fdisk */ |
853 | } |
854 | |
855 | static void config_cdb_len(struct scsi_device *sdev) |
856 | { |
857 | switch (sdebug_cdb_len) { |
858 | case 6: /* suggest 6 byte READ, WRITE and MODE SENSE/SELECT */ |
859 | sdev->use_10_for_rw = false; |
860 | sdev->use_16_for_rw = false; |
861 | sdev->use_10_for_ms = false; |
862 | break; |
863 | case 10: /* suggest 10 byte RWs and 6 byte MODE SENSE/SELECT */ |
864 | sdev->use_10_for_rw = true; |
865 | sdev->use_16_for_rw = false; |
866 | sdev->use_10_for_ms = false; |
867 | break; |
868 | case 12: /* suggest 10 byte RWs and 10 byte MODE SENSE/SELECT */ |
869 | sdev->use_10_for_rw = true; |
870 | sdev->use_16_for_rw = false; |
871 | sdev->use_10_for_ms = true; |
872 | break; |
873 | case 16: |
874 | sdev->use_10_for_rw = false; |
875 | sdev->use_16_for_rw = true; |
876 | sdev->use_10_for_ms = true; |
877 | break; |
878 | case 32: /* No knobs to suggest this so same as 16 for now */ |
879 | sdev->use_10_for_rw = false; |
880 | sdev->use_16_for_rw = true; |
881 | sdev->use_10_for_ms = true; |
882 | break; |
883 | default: |
884 | pr_warn("unexpected cdb_len=%d, force to 10\n" , |
885 | sdebug_cdb_len); |
886 | sdev->use_10_for_rw = true; |
887 | sdev->use_16_for_rw = false; |
888 | sdev->use_10_for_ms = false; |
889 | sdebug_cdb_len = 10; |
890 | break; |
891 | } |
892 | } |
893 | |
894 | static void all_config_cdb_len(void) |
895 | { |
896 | struct sdebug_host_info *sdbg_host; |
897 | struct Scsi_Host *shost; |
898 | struct scsi_device *sdev; |
899 | |
900 | spin_lock(&sdebug_host_list_lock); |
901 | list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) { |
902 | shost = sdbg_host->shost; |
903 | shost_for_each_device(sdev, shost) { |
904 | config_cdb_len(sdev); |
905 | } |
906 | } |
907 | spin_unlock(&sdebug_host_list_lock); |
908 | } |
909 | |
910 | static void clear_luns_changed_on_target(struct sdebug_dev_info *devip) |
911 | { |
912 | struct sdebug_host_info *sdhp; |
913 | struct sdebug_dev_info *dp; |
914 | |
915 | spin_lock(&sdebug_host_list_lock); |
916 | list_for_each_entry(sdhp, &sdebug_host_list, host_list) { |
917 | list_for_each_entry(dp, &sdhp->dev_info_list, dev_list) { |
918 | if ((devip->sdbg_host == dp->sdbg_host) && |
919 | (devip->target == dp->target)) |
920 | clear_bit(SDEBUG_UA_LUNS_CHANGED, dp->uas_bm); |
921 | } |
922 | } |
923 | spin_unlock(&sdebug_host_list_lock); |
924 | } |
925 | |
926 | static int make_ua(struct scsi_cmnd *scp, struct sdebug_dev_info *devip) |
927 | { |
928 | int k; |
929 | |
930 | k = find_first_bit(devip->uas_bm, SDEBUG_NUM_UAS); |
931 | if (k != SDEBUG_NUM_UAS) { |
932 | const char *cp = NULL; |
933 | |
934 | switch (k) { |
935 | case SDEBUG_UA_POR: |
936 | mk_sense_buffer(scp, UNIT_ATTENTION, UA_RESET_ASC, |
937 | POWER_ON_RESET_ASCQ); |
938 | if (sdebug_verbose) |
939 | cp = "power on reset" ; |
940 | break; |
941 | case SDEBUG_UA_BUS_RESET: |
942 | mk_sense_buffer(scp, UNIT_ATTENTION, UA_RESET_ASC, |
943 | BUS_RESET_ASCQ); |
944 | if (sdebug_verbose) |
945 | cp = "bus reset" ; |
946 | break; |
947 | case SDEBUG_UA_MODE_CHANGED: |
948 | mk_sense_buffer(scp, UNIT_ATTENTION, UA_CHANGED_ASC, |
949 | MODE_CHANGED_ASCQ); |
950 | if (sdebug_verbose) |
951 | cp = "mode parameters changed" ; |
952 | break; |
953 | case SDEBUG_UA_CAPACITY_CHANGED: |
954 | mk_sense_buffer(scp, UNIT_ATTENTION, UA_CHANGED_ASC, |
955 | CAPACITY_CHANGED_ASCQ); |
956 | if (sdebug_verbose) |
957 | cp = "capacity data changed" ; |
958 | break; |
959 | case SDEBUG_UA_MICROCODE_CHANGED: |
960 | mk_sense_buffer(scp, UNIT_ATTENTION, |
961 | TARGET_CHANGED_ASC, |
962 | MICROCODE_CHANGED_ASCQ); |
963 | if (sdebug_verbose) |
964 | cp = "microcode has been changed" ; |
965 | break; |
966 | case SDEBUG_UA_MICROCODE_CHANGED_WO_RESET: |
967 | mk_sense_buffer(scp, UNIT_ATTENTION, |
968 | TARGET_CHANGED_ASC, |
969 | MICROCODE_CHANGED_WO_RESET_ASCQ); |
970 | if (sdebug_verbose) |
971 | cp = "microcode has been changed without reset" ; |
972 | break; |
973 | case SDEBUG_UA_LUNS_CHANGED: |
974 | /* |
975 | * SPC-3 behavior is to report a UNIT ATTENTION with |
976 | * ASC/ASCQ REPORTED LUNS DATA HAS CHANGED on every LUN |
977 | * on the target, until a REPORT LUNS command is |
978 | * received. SPC-4 behavior is to report it only once. |
979 | * NOTE: sdebug_scsi_level does not use the same |
980 | * values as struct scsi_device->scsi_level. |
981 | */ |
982 | if (sdebug_scsi_level >= 6) /* SPC-4 and above */ |
983 | clear_luns_changed_on_target(devip); |
984 | mk_sense_buffer(scp, UNIT_ATTENTION, |
985 | TARGET_CHANGED_ASC, |
986 | LUNS_CHANGED_ASCQ); |
987 | if (sdebug_verbose) |
988 | cp = "reported luns data has changed" ; |
989 | break; |
990 | default: |
991 | pr_warn("unexpected unit attention code=%d\n" , k); |
992 | if (sdebug_verbose) |
993 | cp = "unknown" ; |
994 | break; |
995 | } |
996 | clear_bit(k, devip->uas_bm); |
997 | if (sdebug_verbose) |
998 | sdev_printk(KERN_INFO, scp->device, |
999 | "%s reports: Unit attention: %s\n" , |
1000 | my_name, cp); |
1001 | return check_condition_result; |
1002 | } |
1003 | return 0; |
1004 | } |
1005 | |
1006 | /* Build SCSI "data-in" buffer. Returns 0 if ok else (DID_ERROR << 16). */ |
1007 | static int fill_from_dev_buffer(struct scsi_cmnd *scp, unsigned char *arr, |
1008 | int arr_len) |
1009 | { |
1010 | int act_len; |
1011 | struct scsi_data_buffer *sdb = &scp->sdb; |
1012 | |
1013 | if (!sdb->length) |
1014 | return 0; |
1015 | if (scp->sc_data_direction != DMA_FROM_DEVICE) |
1016 | return DID_ERROR << 16; |
1017 | |
1018 | act_len = sg_copy_from_buffer(sdb->table.sgl, sdb->table.nents, |
1019 | arr, arr_len); |
1020 | scsi_set_resid(scp, scsi_bufflen(scp) - act_len); |
1021 | |
1022 | return 0; |
1023 | } |
1024 | |
1025 | /* Partial build of SCSI "data-in" buffer. Returns 0 if ok else |
1026 | * (DID_ERROR << 16). Can write to offset in data-in buffer. If multiple |
1027 | * calls, not required to write in ascending offset order. Assumes resid |
1028 | * set to scsi_bufflen() prior to any calls. |
1029 | */ |
1030 | static int p_fill_from_dev_buffer(struct scsi_cmnd *scp, const void *arr, |
1031 | int arr_len, unsigned int off_dst) |
1032 | { |
1033 | int act_len, n; |
1034 | struct scsi_data_buffer *sdb = &scp->sdb; |
1035 | off_t skip = off_dst; |
1036 | |
1037 | if (sdb->length <= off_dst) |
1038 | return 0; |
1039 | if (scp->sc_data_direction != DMA_FROM_DEVICE) |
1040 | return DID_ERROR << 16; |
1041 | |
1042 | act_len = sg_pcopy_from_buffer(sdb->table.sgl, sdb->table.nents, |
1043 | arr, arr_len, skip); |
1044 | pr_debug("%s: off_dst=%u, scsi_bufflen=%u, act_len=%u, resid=%d\n" , |
1045 | __func__, off_dst, scsi_bufflen(scp), act_len, |
1046 | scsi_get_resid(scp)); |
1047 | n = (int)scsi_bufflen(scp) - ((int)off_dst + act_len); |
1048 | scsi_set_resid(scp, min(scsi_get_resid(scp), n)); |
1049 | return 0; |
1050 | } |
1051 | |
1052 | /* Fetches from SCSI "data-out" buffer. Returns number of bytes fetched into |
1053 | * 'arr' or -1 if error. |
1054 | */ |
1055 | static int fetch_to_dev_buffer(struct scsi_cmnd *scp, unsigned char *arr, |
1056 | int arr_len) |
1057 | { |
1058 | if (!scsi_bufflen(scp)) |
1059 | return 0; |
1060 | if (scp->sc_data_direction != DMA_TO_DEVICE) |
1061 | return -1; |
1062 | |
1063 | return scsi_sg_copy_to_buffer(scp, arr, arr_len); |
1064 | } |
1065 | |
1066 | |
1067 | static char sdebug_inq_vendor_id[9] = "Linux " ; |
1068 | static char sdebug_inq_product_id[17] = "scsi_debug " ; |
1069 | static char sdebug_inq_product_rev[5] = SDEBUG_VERSION; |
1070 | /* Use some locally assigned NAAs for SAS addresses. */ |
1071 | static const u64 naa3_comp_a = 0x3222222000000000ULL; |
1072 | static const u64 naa3_comp_b = 0x3333333000000000ULL; |
1073 | static const u64 naa3_comp_c = 0x3111111000000000ULL; |
1074 | |
1075 | /* Device identification VPD page. Returns number of bytes placed in arr */ |
1076 | static int inquiry_vpd_83(unsigned char *arr, int port_group_id, |
1077 | int target_dev_id, int dev_id_num, |
1078 | const char *dev_id_str, int dev_id_str_len, |
1079 | const uuid_t *lu_name) |
1080 | { |
1081 | int num, port_a; |
1082 | char b[32]; |
1083 | |
1084 | port_a = target_dev_id + 1; |
1085 | /* T10 vendor identifier field format (faked) */ |
1086 | arr[0] = 0x2; /* ASCII */ |
1087 | arr[1] = 0x1; |
1088 | arr[2] = 0x0; |
1089 | memcpy(&arr[4], sdebug_inq_vendor_id, 8); |
1090 | memcpy(&arr[12], sdebug_inq_product_id, 16); |
1091 | memcpy(&arr[28], dev_id_str, dev_id_str_len); |
1092 | num = 8 + 16 + dev_id_str_len; |
1093 | arr[3] = num; |
1094 | num += 4; |
1095 | if (dev_id_num >= 0) { |
1096 | if (sdebug_uuid_ctl) { |
1097 | /* Locally assigned UUID */ |
1098 | arr[num++] = 0x1; /* binary (not necessarily sas) */ |
1099 | arr[num++] = 0xa; /* PIV=0, lu, naa */ |
1100 | arr[num++] = 0x0; |
1101 | arr[num++] = 0x12; |
1102 | arr[num++] = 0x10; /* uuid type=1, locally assigned */ |
1103 | arr[num++] = 0x0; |
1104 | memcpy(arr + num, lu_name, 16); |
1105 | num += 16; |
1106 | } else { |
1107 | /* NAA-3, Logical unit identifier (binary) */ |
1108 | arr[num++] = 0x1; /* binary (not necessarily sas) */ |
1109 | arr[num++] = 0x3; /* PIV=0, lu, naa */ |
1110 | arr[num++] = 0x0; |
1111 | arr[num++] = 0x8; |
1112 | put_unaligned_be64(naa3_comp_b + dev_id_num, arr + num); |
1113 | num += 8; |
1114 | } |
1115 | /* Target relative port number */ |
1116 | arr[num++] = 0x61; /* proto=sas, binary */ |
1117 | arr[num++] = 0x94; /* PIV=1, target port, rel port */ |
1118 | arr[num++] = 0x0; /* reserved */ |
1119 | arr[num++] = 0x4; /* length */ |
1120 | arr[num++] = 0x0; /* reserved */ |
1121 | arr[num++] = 0x0; /* reserved */ |
1122 | arr[num++] = 0x0; |
1123 | arr[num++] = 0x1; /* relative port A */ |
1124 | } |
1125 | /* NAA-3, Target port identifier */ |
1126 | arr[num++] = 0x61; /* proto=sas, binary */ |
1127 | arr[num++] = 0x93; /* piv=1, target port, naa */ |
1128 | arr[num++] = 0x0; |
1129 | arr[num++] = 0x8; |
1130 | put_unaligned_be64(naa3_comp_a + port_a, arr + num); |
1131 | num += 8; |
1132 | /* NAA-3, Target port group identifier */ |
1133 | arr[num++] = 0x61; /* proto=sas, binary */ |
1134 | arr[num++] = 0x95; /* piv=1, target port group id */ |
1135 | arr[num++] = 0x0; |
1136 | arr[num++] = 0x4; |
1137 | arr[num++] = 0; |
1138 | arr[num++] = 0; |
1139 | put_unaligned_be16(port_group_id, arr + num); |
1140 | num += 2; |
1141 | /* NAA-3, Target device identifier */ |
1142 | arr[num++] = 0x61; /* proto=sas, binary */ |
1143 | arr[num++] = 0xa3; /* piv=1, target device, naa */ |
1144 | arr[num++] = 0x0; |
1145 | arr[num++] = 0x8; |
1146 | put_unaligned_be64(naa3_comp_a + target_dev_id, arr + num); |
1147 | num += 8; |
1148 | /* SCSI name string: Target device identifier */ |
1149 | arr[num++] = 0x63; /* proto=sas, UTF-8 */ |
1150 | arr[num++] = 0xa8; /* piv=1, target device, SCSI name string */ |
1151 | arr[num++] = 0x0; |
1152 | arr[num++] = 24; |
1153 | memcpy(arr + num, "naa.32222220" , 12); |
1154 | num += 12; |
1155 | snprintf(b, sizeof(b), "%08X" , target_dev_id); |
1156 | memcpy(arr + num, b, 8); |
1157 | num += 8; |
1158 | memset(arr + num, 0, 4); |
1159 | num += 4; |
1160 | return num; |
1161 | } |
1162 | |
1163 | static unsigned char vpd84_data[] = { |
1164 | /* from 4th byte */ 0x22,0x22,0x22,0x0,0xbb,0x0, |
1165 | 0x22,0x22,0x22,0x0,0xbb,0x1, |
1166 | 0x22,0x22,0x22,0x0,0xbb,0x2, |
1167 | }; |
1168 | |
1169 | /* Software interface identification VPD page */ |
1170 | static int inquiry_vpd_84(unsigned char *arr) |
1171 | { |
1172 | memcpy(arr, vpd84_data, sizeof(vpd84_data)); |
1173 | return sizeof(vpd84_data); |
1174 | } |
1175 | |
1176 | /* Management network addresses VPD page */ |
1177 | static int inquiry_vpd_85(unsigned char *arr) |
1178 | { |
1179 | int num = 0; |
1180 | const char *na1 = "https://www.kernel.org/config" ; |
1181 | const char *na2 = "http://www.kernel.org/log" ; |
1182 | int plen, olen; |
1183 | |
1184 | arr[num++] = 0x1; /* lu, storage config */ |
1185 | arr[num++] = 0x0; /* reserved */ |
1186 | arr[num++] = 0x0; |
1187 | olen = strlen(na1); |
1188 | plen = olen + 1; |
1189 | if (plen % 4) |
1190 | plen = ((plen / 4) + 1) * 4; |
1191 | arr[num++] = plen; /* length, null termianted, padded */ |
1192 | memcpy(arr + num, na1, olen); |
1193 | memset(arr + num + olen, 0, plen - olen); |
1194 | num += plen; |
1195 | |
1196 | arr[num++] = 0x4; /* lu, logging */ |
1197 | arr[num++] = 0x0; /* reserved */ |
1198 | arr[num++] = 0x0; |
1199 | olen = strlen(na2); |
1200 | plen = olen + 1; |
1201 | if (plen % 4) |
1202 | plen = ((plen / 4) + 1) * 4; |
1203 | arr[num++] = plen; /* length, null terminated, padded */ |
1204 | memcpy(arr + num, na2, olen); |
1205 | memset(arr + num + olen, 0, plen - olen); |
1206 | num += plen; |
1207 | |
1208 | return num; |
1209 | } |
1210 | |
1211 | /* SCSI ports VPD page */ |
1212 | static int inquiry_vpd_88(unsigned char *arr, int target_dev_id) |
1213 | { |
1214 | int num = 0; |
1215 | int port_a, port_b; |
1216 | |
1217 | port_a = target_dev_id + 1; |
1218 | port_b = port_a + 1; |
1219 | arr[num++] = 0x0; /* reserved */ |
1220 | arr[num++] = 0x0; /* reserved */ |
1221 | arr[num++] = 0x0; |
1222 | arr[num++] = 0x1; /* relative port 1 (primary) */ |
1223 | memset(arr + num, 0, 6); |
1224 | num += 6; |
1225 | arr[num++] = 0x0; |
1226 | arr[num++] = 12; /* length tp descriptor */ |
1227 | /* naa-5 target port identifier (A) */ |
1228 | arr[num++] = 0x61; /* proto=sas, binary */ |
1229 | arr[num++] = 0x93; /* PIV=1, target port, NAA */ |
1230 | arr[num++] = 0x0; /* reserved */ |
1231 | arr[num++] = 0x8; /* length */ |
1232 | put_unaligned_be64(naa3_comp_a + port_a, arr + num); |
1233 | num += 8; |
1234 | arr[num++] = 0x0; /* reserved */ |
1235 | arr[num++] = 0x0; /* reserved */ |
1236 | arr[num++] = 0x0; |
1237 | arr[num++] = 0x2; /* relative port 2 (secondary) */ |
1238 | memset(arr + num, 0, 6); |
1239 | num += 6; |
1240 | arr[num++] = 0x0; |
1241 | arr[num++] = 12; /* length tp descriptor */ |
1242 | /* naa-5 target port identifier (B) */ |
1243 | arr[num++] = 0x61; /* proto=sas, binary */ |
1244 | arr[num++] = 0x93; /* PIV=1, target port, NAA */ |
1245 | arr[num++] = 0x0; /* reserved */ |
1246 | arr[num++] = 0x8; /* length */ |
1247 | put_unaligned_be64(naa3_comp_a + port_b, arr + num); |
1248 | num += 8; |
1249 | |
1250 | return num; |
1251 | } |
1252 | |
1253 | |
1254 | static unsigned char vpd89_data[] = { |
1255 | /* from 4th byte */ 0,0,0,0, |
1256 | 'l','i','n','u','x',' ',' ',' ', |
1257 | 'S','A','T',' ','s','c','s','i','_','d','e','b','u','g',' ',' ', |
1258 | '1','2','3','4', |
1259 | 0x34,0,0,0,1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0, |
1260 | 0xec,0,0,0, |
1261 | 0x5a,0xc,0xff,0x3f,0x37,0xc8,0x10,0,0,0,0,0,0x3f,0,0,0, |
1262 | 0,0,0,0,0x58,0x58,0x58,0x58,0x58,0x58,0x58,0x58,0x20,0x20,0x20,0x20, |
1263 | 0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0,0,0,0x40,0x4,0,0x2e,0x33, |
1264 | 0x38,0x31,0x20,0x20,0x20,0x20,0x54,0x53,0x38,0x33,0x30,0x30,0x33,0x31, |
1265 | 0x53,0x41, |
1266 | 0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20, |
1267 | 0x20,0x20, |
1268 | 0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20, |
1269 | 0x10,0x80, |
1270 | 0,0,0,0x2f,0,0,0,0x2,0,0x2,0x7,0,0xff,0xff,0x1,0, |
1271 | 0x3f,0,0xc1,0xff,0x3e,0,0x10,0x1,0xb0,0xf8,0x50,0x9,0,0,0x7,0, |
1272 | 0x3,0,0x78,0,0x78,0,0xf0,0,0x78,0,0,0,0,0,0,0, |
1273 | 0,0,0,0,0,0,0,0,0x2,0,0,0,0,0,0,0, |
1274 | 0x7e,0,0x1b,0,0x6b,0x34,0x1,0x7d,0x3,0x40,0x69,0x34,0x1,0x3c,0x3,0x40, |
1275 | 0x7f,0x40,0,0,0,0,0xfe,0xfe,0,0,0,0,0,0xfe,0,0, |
1276 | 0,0,0,0,0,0,0,0,0xb0,0xf8,0x50,0x9,0,0,0,0, |
1277 | 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, |
1278 | 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, |
1279 | 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, |
1280 | 0x1,0,0xb0,0xf8,0x50,0x9,0xb0,0xf8,0x50,0x9,0x20,0x20,0x2,0,0xb6,0x42, |
1281 | 0,0x80,0x8a,0,0x6,0x3c,0xa,0x3c,0xff,0xff,0xc6,0x7,0,0x1,0,0x8, |
1282 | 0xf0,0xf,0,0x10,0x2,0,0x30,0,0,0,0,0,0,0,0x6,0xfe, |
1283 | 0,0,0x2,0,0x50,0,0x8a,0,0x4f,0x95,0,0,0x21,0,0xb,0, |
1284 | 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, |
1285 | 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, |
1286 | 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, |
1287 | 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, |
1288 | 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, |
1289 | 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, |
1290 | 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, |
1291 | 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, |
1292 | 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, |
1293 | 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, |
1294 | 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, |
1295 | 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0xa5,0x51, |
1296 | }; |
1297 | |
1298 | /* ATA Information VPD page */ |
1299 | static int inquiry_vpd_89(unsigned char *arr) |
1300 | { |
1301 | memcpy(arr, vpd89_data, sizeof(vpd89_data)); |
1302 | return sizeof(vpd89_data); |
1303 | } |
1304 | |
1305 | |
1306 | static unsigned char vpdb0_data[] = { |
1307 | /* from 4th byte */ 0,0,0,4, 0,0,0x4,0, 0,0,0,64, |
1308 | 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, |
1309 | 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, |
1310 | 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, |
1311 | }; |
1312 | |
1313 | /* Block limits VPD page (SBC-3) */ |
1314 | static int inquiry_vpd_b0(unsigned char *arr) |
1315 | { |
1316 | unsigned int gran; |
1317 | |
1318 | memcpy(arr, vpdb0_data, sizeof(vpdb0_data)); |
1319 | |
1320 | /* Optimal transfer length granularity */ |
1321 | if (sdebug_opt_xferlen_exp != 0 && |
1322 | sdebug_physblk_exp < sdebug_opt_xferlen_exp) |
1323 | gran = 1 << sdebug_opt_xferlen_exp; |
1324 | else |
1325 | gran = 1 << sdebug_physblk_exp; |
1326 | put_unaligned_be16(gran, arr + 2); |
1327 | |
1328 | /* Maximum Transfer Length */ |
1329 | if (sdebug_store_sectors > 0x400) |
1330 | put_unaligned_be32(sdebug_store_sectors, arr + 4); |
1331 | |
1332 | /* Optimal Transfer Length */ |
1333 | put_unaligned_be32(sdebug_opt_blks, &arr[8]); |
1334 | |
1335 | if (sdebug_lbpu) { |
1336 | /* Maximum Unmap LBA Count */ |
1337 | put_unaligned_be32(sdebug_unmap_max_blocks, &arr[16]); |
1338 | |
1339 | /* Maximum Unmap Block Descriptor Count */ |
1340 | put_unaligned_be32(sdebug_unmap_max_desc, &arr[20]); |
1341 | } |
1342 | |
1343 | /* Unmap Granularity Alignment */ |
1344 | if (sdebug_unmap_alignment) { |
1345 | put_unaligned_be32(sdebug_unmap_alignment, &arr[28]); |
1346 | arr[28] |= 0x80; /* UGAVALID */ |
1347 | } |
1348 | |
1349 | /* Optimal Unmap Granularity */ |
1350 | put_unaligned_be32(sdebug_unmap_granularity, &arr[24]); |
1351 | |
1352 | /* Maximum WRITE SAME Length */ |
1353 | put_unaligned_be64(sdebug_write_same_length, &arr[32]); |
1354 | |
1355 | return 0x3c; /* Mandatory page length for Logical Block Provisioning */ |
1356 | |
1357 | return sizeof(vpdb0_data); |
1358 | } |
1359 | |
1360 | /* Block device characteristics VPD page (SBC-3) */ |
1361 | static int inquiry_vpd_b1(unsigned char *arr) |
1362 | { |
1363 | memset(arr, 0, 0x3c); |
1364 | arr[0] = 0; |
1365 | arr[1] = 1; /* non rotating medium (e.g. solid state) */ |
1366 | arr[2] = 0; |
1367 | arr[3] = 5; /* less than 1.8" */ |
1368 | |
1369 | return 0x3c; |
1370 | } |
1371 | |
1372 | /* Logical block provisioning VPD page (SBC-4) */ |
1373 | static int inquiry_vpd_b2(unsigned char *arr) |
1374 | { |
1375 | memset(arr, 0, 0x4); |
1376 | arr[0] = 0; /* threshold exponent */ |
1377 | if (sdebug_lbpu) |
1378 | arr[1] = 1 << 7; |
1379 | if (sdebug_lbpws) |
1380 | arr[1] |= 1 << 6; |
1381 | if (sdebug_lbpws10) |
1382 | arr[1] |= 1 << 5; |
1383 | if (sdebug_lbprz && scsi_debug_lbp()) |
1384 | arr[1] |= (sdebug_lbprz & 0x7) << 2; /* sbc4r07 and later */ |
1385 | /* anc_sup=0; dp=0 (no provisioning group descriptor) */ |
1386 | /* minimum_percentage=0; provisioning_type=0 (unknown) */ |
1387 | /* threshold_percentage=0 */ |
1388 | return 0x4; |
1389 | } |
1390 | |
1391 | #define SDEBUG_LONG_INQ_SZ 96 |
1392 | #define SDEBUG_MAX_INQ_ARR_SZ 584 |
1393 | |
1394 | static int resp_inquiry(struct scsi_cmnd *scp, struct sdebug_dev_info *devip) |
1395 | { |
1396 | unsigned char pq_pdt; |
1397 | unsigned char *arr; |
1398 | unsigned char *cmd = scp->cmnd; |
1399 | int alloc_len, n, ret; |
1400 | bool have_wlun, is_disk; |
1401 | |
1402 | alloc_len = get_unaligned_be16(cmd + 3); |
1403 | arr = kzalloc(SDEBUG_MAX_INQ_ARR_SZ, GFP_ATOMIC); |
1404 | if (! arr) |
1405 | return DID_REQUEUE << 16; |
1406 | is_disk = (sdebug_ptype == TYPE_DISK); |
1407 | have_wlun = scsi_is_wlun(scp->device->lun); |
1408 | if (have_wlun) |
1409 | pq_pdt = TYPE_WLUN; /* present, wlun */ |
1410 | else if (sdebug_no_lun_0 && (devip->lun == SDEBUG_LUN_0_VAL)) |
1411 | pq_pdt = 0x7f; /* not present, PQ=3, PDT=0x1f */ |
1412 | else |
1413 | pq_pdt = (sdebug_ptype & 0x1f); |
1414 | arr[0] = pq_pdt; |
1415 | if (0x2 & cmd[1]) { /* CMDDT bit set */ |
1416 | mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 1); |
1417 | kfree(arr); |
1418 | return check_condition_result; |
1419 | } else if (0x1 & cmd[1]) { /* EVPD bit set */ |
1420 | int lu_id_num, port_group_id, target_dev_id, len; |
1421 | char lu_id_str[6]; |
1422 | int host_no = devip->sdbg_host->shost->host_no; |
1423 | |
1424 | port_group_id = (((host_no + 1) & 0x7f) << 8) + |
1425 | (devip->channel & 0x7f); |
1426 | if (sdebug_vpd_use_hostno == 0) |
1427 | host_no = 0; |
1428 | lu_id_num = have_wlun ? -1 : (((host_no + 1) * 2000) + |
1429 | (devip->target * 1000) + devip->lun); |
1430 | target_dev_id = ((host_no + 1) * 2000) + |
1431 | (devip->target * 1000) - 3; |
1432 | len = scnprintf(lu_id_str, 6, "%d" , lu_id_num); |
1433 | if (0 == cmd[2]) { /* supported vital product data pages */ |
1434 | arr[1] = cmd[2]; /*sanity */ |
1435 | n = 4; |
1436 | arr[n++] = 0x0; /* this page */ |
1437 | arr[n++] = 0x80; /* unit serial number */ |
1438 | arr[n++] = 0x83; /* device identification */ |
1439 | arr[n++] = 0x84; /* software interface ident. */ |
1440 | arr[n++] = 0x85; /* management network addresses */ |
1441 | arr[n++] = 0x86; /* extended inquiry */ |
1442 | arr[n++] = 0x87; /* mode page policy */ |
1443 | arr[n++] = 0x88; /* SCSI ports */ |
1444 | if (is_disk) { /* SBC only */ |
1445 | arr[n++] = 0x89; /* ATA information */ |
1446 | arr[n++] = 0xb0; /* Block limits */ |
1447 | arr[n++] = 0xb1; /* Block characteristics */ |
1448 | arr[n++] = 0xb2; /* Logical Block Prov */ |
1449 | } |
1450 | arr[3] = n - 4; /* number of supported VPD pages */ |
1451 | } else if (0x80 == cmd[2]) { /* unit serial number */ |
1452 | arr[1] = cmd[2]; /*sanity */ |
1453 | arr[3] = len; |
1454 | memcpy(&arr[4], lu_id_str, len); |
1455 | } else if (0x83 == cmd[2]) { /* device identification */ |
1456 | arr[1] = cmd[2]; /*sanity */ |
1457 | arr[3] = inquiry_vpd_83(&arr[4], port_group_id, |
1458 | target_dev_id, lu_id_num, |
1459 | lu_id_str, len, |
1460 | &devip->lu_name); |
1461 | } else if (0x84 == cmd[2]) { /* Software interface ident. */ |
1462 | arr[1] = cmd[2]; /*sanity */ |
1463 | arr[3] = inquiry_vpd_84(&arr[4]); |
1464 | } else if (0x85 == cmd[2]) { /* Management network addresses */ |
1465 | arr[1] = cmd[2]; /*sanity */ |
1466 | arr[3] = inquiry_vpd_85(&arr[4]); |
1467 | } else if (0x86 == cmd[2]) { /* extended inquiry */ |
1468 | arr[1] = cmd[2]; /*sanity */ |
1469 | arr[3] = 0x3c; /* number of following entries */ |
1470 | if (sdebug_dif == T10_PI_TYPE3_PROTECTION) |
1471 | arr[4] = 0x4; /* SPT: GRD_CHK:1 */ |
1472 | else if (have_dif_prot) |
1473 | arr[4] = 0x5; /* SPT: GRD_CHK:1, REF_CHK:1 */ |
1474 | else |
1475 | arr[4] = 0x0; /* no protection stuff */ |
1476 | arr[5] = 0x7; /* head of q, ordered + simple q's */ |
1477 | } else if (0x87 == cmd[2]) { /* mode page policy */ |
1478 | arr[1] = cmd[2]; /*sanity */ |
1479 | arr[3] = 0x8; /* number of following entries */ |
1480 | arr[4] = 0x2; /* disconnect-reconnect mp */ |
1481 | arr[6] = 0x80; /* mlus, shared */ |
1482 | arr[8] = 0x18; /* protocol specific lu */ |
1483 | arr[10] = 0x82; /* mlus, per initiator port */ |
1484 | } else if (0x88 == cmd[2]) { /* SCSI Ports */ |
1485 | arr[1] = cmd[2]; /*sanity */ |
1486 | arr[3] = inquiry_vpd_88(&arr[4], target_dev_id); |
1487 | } else if (is_disk && 0x89 == cmd[2]) { /* ATA information */ |
1488 | arr[1] = cmd[2]; /*sanity */ |
1489 | n = inquiry_vpd_89(&arr[4]); |
1490 | put_unaligned_be16(n, arr + 2); |
1491 | } else if (is_disk && 0xb0 == cmd[2]) { /* Block limits */ |
1492 | arr[1] = cmd[2]; /*sanity */ |
1493 | arr[3] = inquiry_vpd_b0(&arr[4]); |
1494 | } else if (is_disk && 0xb1 == cmd[2]) { /* Block char. */ |
1495 | arr[1] = cmd[2]; /*sanity */ |
1496 | arr[3] = inquiry_vpd_b1(&arr[4]); |
1497 | } else if (is_disk && 0xb2 == cmd[2]) { /* LB Prov. */ |
1498 | arr[1] = cmd[2]; /*sanity */ |
1499 | arr[3] = inquiry_vpd_b2(&arr[4]); |
1500 | } else { |
1501 | mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, -1); |
1502 | kfree(arr); |
1503 | return check_condition_result; |
1504 | } |
1505 | len = min(get_unaligned_be16(arr + 2) + 4, alloc_len); |
1506 | ret = fill_from_dev_buffer(scp, arr, |
1507 | min(len, SDEBUG_MAX_INQ_ARR_SZ)); |
1508 | kfree(arr); |
1509 | return ret; |
1510 | } |
1511 | /* drops through here for a standard inquiry */ |
1512 | arr[1] = sdebug_removable ? 0x80 : 0; /* Removable disk */ |
1513 | arr[2] = sdebug_scsi_level; |
1514 | arr[3] = 2; /* response_data_format==2 */ |
1515 | arr[4] = SDEBUG_LONG_INQ_SZ - 5; |
1516 | arr[5] = (int)have_dif_prot; /* PROTECT bit */ |
1517 | if (sdebug_vpd_use_hostno == 0) |
1518 | arr[5] |= 0x10; /* claim: implicit TPGS */ |
1519 | arr[6] = 0x10; /* claim: MultiP */ |
1520 | /* arr[6] |= 0x40; ... claim: EncServ (enclosure services) */ |
1521 | arr[7] = 0xa; /* claim: LINKED + CMDQUE */ |
1522 | memcpy(&arr[8], sdebug_inq_vendor_id, 8); |
1523 | memcpy(&arr[16], sdebug_inq_product_id, 16); |
1524 | memcpy(&arr[32], sdebug_inq_product_rev, 4); |
1525 | /* Use Vendor Specific area to place driver date in ASCII hex */ |
1526 | memcpy(&arr[36], sdebug_version_date, 8); |
1527 | /* version descriptors (2 bytes each) follow */ |
1528 | put_unaligned_be16(0xc0, arr + 58); /* SAM-6 no version claimed */ |
1529 | put_unaligned_be16(0x5c0, arr + 60); /* SPC-5 no version claimed */ |
1530 | n = 62; |
1531 | if (is_disk) { /* SBC-4 no version claimed */ |
1532 | put_unaligned_be16(0x600, arr + n); |
1533 | n += 2; |
1534 | } else if (sdebug_ptype == TYPE_TAPE) { /* SSC-4 rev 3 */ |
1535 | put_unaligned_be16(0x525, arr + n); |
1536 | n += 2; |
1537 | } |
1538 | put_unaligned_be16(0x2100, arr + n); /* SPL-4 no version claimed */ |
1539 | ret = fill_from_dev_buffer(scp, arr, |
1540 | min(alloc_len, SDEBUG_LONG_INQ_SZ)); |
1541 | kfree(arr); |
1542 | return ret; |
1543 | } |
1544 | |
1545 | static unsigned char iec_m_pg[] = {0x1c, 0xa, 0x08, 0, 0, 0, 0, 0, |
1546 | 0, 0, 0x0, 0x0}; |
1547 | |
1548 | static int resp_requests(struct scsi_cmnd *scp, |
1549 | struct sdebug_dev_info *devip) |
1550 | { |
1551 | unsigned char *sbuff; |
1552 | unsigned char *cmd = scp->cmnd; |
1553 | unsigned char arr[SCSI_SENSE_BUFFERSIZE]; |
1554 | bool dsense; |
1555 | int len = 18; |
1556 | |
1557 | memset(arr, 0, sizeof(arr)); |
1558 | dsense = !!(cmd[1] & 1); |
1559 | sbuff = scp->sense_buffer; |
1560 | if ((iec_m_pg[2] & 0x4) && (6 == (iec_m_pg[3] & 0xf))) { |
1561 | if (dsense) { |
1562 | arr[0] = 0x72; |
1563 | arr[1] = 0x0; /* NO_SENSE in sense_key */ |
1564 | arr[2] = THRESHOLD_EXCEEDED; |
1565 | arr[3] = 0xff; /* TEST set and MRIE==6 */ |
1566 | len = 8; |
1567 | } else { |
1568 | arr[0] = 0x70; |
1569 | arr[2] = 0x0; /* NO_SENSE in sense_key */ |
1570 | arr[7] = 0xa; /* 18 byte sense buffer */ |
1571 | arr[12] = THRESHOLD_EXCEEDED; |
1572 | arr[13] = 0xff; /* TEST set and MRIE==6 */ |
1573 | } |
1574 | } else { |
1575 | memcpy(arr, sbuff, SCSI_SENSE_BUFFERSIZE); |
1576 | if (arr[0] >= 0x70 && dsense == sdebug_dsense) |
1577 | ; /* have sense and formats match */ |
1578 | else if (arr[0] <= 0x70) { |
1579 | if (dsense) { |
1580 | memset(arr, 0, 8); |
1581 | arr[0] = 0x72; |
1582 | len = 8; |
1583 | } else { |
1584 | memset(arr, 0, 18); |
1585 | arr[0] = 0x70; |
1586 | arr[7] = 0xa; |
1587 | } |
1588 | } else if (dsense) { |
1589 | memset(arr, 0, 8); |
1590 | arr[0] = 0x72; |
1591 | arr[1] = sbuff[2]; /* sense key */ |
1592 | arr[2] = sbuff[12]; /* asc */ |
1593 | arr[3] = sbuff[13]; /* ascq */ |
1594 | len = 8; |
1595 | } else { |
1596 | memset(arr, 0, 18); |
1597 | arr[0] = 0x70; |
1598 | arr[2] = sbuff[1]; |
1599 | arr[7] = 0xa; |
1600 | arr[12] = sbuff[1]; |
1601 | arr[13] = sbuff[3]; |
1602 | } |
1603 | |
1604 | } |
1605 | mk_sense_buffer(scp, 0, NO_ADDITIONAL_SENSE, 0); |
1606 | return fill_from_dev_buffer(scp, arr, len); |
1607 | } |
1608 | |
1609 | static int resp_start_stop(struct scsi_cmnd *scp, |
1610 | struct sdebug_dev_info *devip) |
1611 | { |
1612 | unsigned char *cmd = scp->cmnd; |
1613 | int power_cond, stop; |
1614 | bool changing; |
1615 | |
1616 | power_cond = (cmd[4] & 0xf0) >> 4; |
1617 | if (power_cond) { |
1618 | mk_sense_invalid_fld(scp, SDEB_IN_CDB, 4, 7); |
1619 | return check_condition_result; |
1620 | } |
1621 | stop = !(cmd[4] & 1); |
1622 | changing = atomic_read(&devip->stopped) == !stop; |
1623 | atomic_xchg(&devip->stopped, stop); |
1624 | if (!changing || cmd[1] & 0x1) /* state unchanged or IMMED set */ |
1625 | return SDEG_RES_IMMED_MASK; |
1626 | else |
1627 | return 0; |
1628 | } |
1629 | |
1630 | static sector_t get_sdebug_capacity(void) |
1631 | { |
1632 | static const unsigned int gibibyte = 1073741824; |
1633 | |
1634 | if (sdebug_virtual_gb > 0) |
1635 | return (sector_t)sdebug_virtual_gb * |
1636 | (gibibyte / sdebug_sector_size); |
1637 | else |
1638 | return sdebug_store_sectors; |
1639 | } |
1640 | |
1641 | #define SDEBUG_READCAP_ARR_SZ 8 |
1642 | static int resp_readcap(struct scsi_cmnd *scp, |
1643 | struct sdebug_dev_info *devip) |
1644 | { |
1645 | unsigned char arr[SDEBUG_READCAP_ARR_SZ]; |
1646 | unsigned int capac; |
1647 | |
1648 | /* following just in case virtual_gb changed */ |
1649 | sdebug_capacity = get_sdebug_capacity(); |
1650 | memset(arr, 0, SDEBUG_READCAP_ARR_SZ); |
1651 | if (sdebug_capacity < 0xffffffff) { |
1652 | capac = (unsigned int)sdebug_capacity - 1; |
1653 | put_unaligned_be32(capac, arr + 0); |
1654 | } else |
1655 | put_unaligned_be32(0xffffffff, arr + 0); |
1656 | put_unaligned_be16(sdebug_sector_size, arr + 6); |
1657 | return fill_from_dev_buffer(scp, arr, SDEBUG_READCAP_ARR_SZ); |
1658 | } |
1659 | |
1660 | #define SDEBUG_READCAP16_ARR_SZ 32 |
1661 | static int resp_readcap16(struct scsi_cmnd *scp, |
1662 | struct sdebug_dev_info *devip) |
1663 | { |
1664 | unsigned char *cmd = scp->cmnd; |
1665 | unsigned char arr[SDEBUG_READCAP16_ARR_SZ]; |
1666 | int alloc_len; |
1667 | |
1668 | alloc_len = get_unaligned_be32(cmd + 10); |
1669 | /* following just in case virtual_gb changed */ |
1670 | sdebug_capacity = get_sdebug_capacity(); |
1671 | memset(arr, 0, SDEBUG_READCAP16_ARR_SZ); |
1672 | put_unaligned_be64((u64)(sdebug_capacity - 1), arr + 0); |
1673 | put_unaligned_be32(sdebug_sector_size, arr + 8); |
1674 | arr[13] = sdebug_physblk_exp & 0xf; |
1675 | arr[14] = (sdebug_lowest_aligned >> 8) & 0x3f; |
1676 | |
1677 | if (scsi_debug_lbp()) { |
1678 | arr[14] |= 0x80; /* LBPME */ |
1679 | /* from sbc4r07, this LBPRZ field is 1 bit, but the LBPRZ in |
1680 | * the LB Provisioning VPD page is 3 bits. Note that lbprz=2 |
1681 | * in the wider field maps to 0 in this field. |
1682 | */ |
1683 | if (sdebug_lbprz & 1) /* precisely what the draft requires */ |
1684 | arr[14] |= 0x40; |
1685 | } |
1686 | |
1687 | arr[15] = sdebug_lowest_aligned & 0xff; |
1688 | |
1689 | if (have_dif_prot) { |
1690 | arr[12] = (sdebug_dif - 1) << 1; /* P_TYPE */ |
1691 | arr[12] |= 1; /* PROT_EN */ |
1692 | } |
1693 | |
1694 | return fill_from_dev_buffer(scp, arr, |
1695 | min(alloc_len, SDEBUG_READCAP16_ARR_SZ)); |
1696 | } |
1697 | |
1698 | #define SDEBUG_MAX_TGTPGS_ARR_SZ 1412 |
1699 | |
1700 | static int resp_report_tgtpgs(struct scsi_cmnd *scp, |
1701 | struct sdebug_dev_info *devip) |
1702 | { |
1703 | unsigned char *cmd = scp->cmnd; |
1704 | unsigned char *arr; |
1705 | int host_no = devip->sdbg_host->shost->host_no; |
1706 | int n, ret, alen, rlen; |
1707 | int port_group_a, port_group_b, port_a, port_b; |
1708 | |
1709 | alen = get_unaligned_be32(cmd + 6); |
1710 | arr = kzalloc(SDEBUG_MAX_TGTPGS_ARR_SZ, GFP_ATOMIC); |
1711 | if (! arr) |
1712 | return DID_REQUEUE << 16; |
1713 | /* |
1714 | * EVPD page 0x88 states we have two ports, one |
1715 | * real and a fake port with no device connected. |
1716 | * So we create two port groups with one port each |
1717 | * and set the group with port B to unavailable. |
1718 | */ |
1719 | port_a = 0x1; /* relative port A */ |
1720 | port_b = 0x2; /* relative port B */ |
1721 | port_group_a = (((host_no + 1) & 0x7f) << 8) + |
1722 | (devip->channel & 0x7f); |
1723 | port_group_b = (((host_no + 1) & 0x7f) << 8) + |
1724 | (devip->channel & 0x7f) + 0x80; |
1725 | |
1726 | /* |
1727 | * The asymmetric access state is cycled according to the host_id. |
1728 | */ |
1729 | n = 4; |
1730 | if (sdebug_vpd_use_hostno == 0) { |
1731 | arr[n++] = host_no % 3; /* Asymm access state */ |
1732 | arr[n++] = 0x0F; /* claim: all states are supported */ |
1733 | } else { |
1734 | arr[n++] = 0x0; /* Active/Optimized path */ |
1735 | arr[n++] = 0x01; /* only support active/optimized paths */ |
1736 | } |
1737 | put_unaligned_be16(port_group_a, arr + n); |
1738 | n += 2; |
1739 | arr[n++] = 0; /* Reserved */ |
1740 | arr[n++] = 0; /* Status code */ |
1741 | arr[n++] = 0; /* Vendor unique */ |
1742 | arr[n++] = 0x1; /* One port per group */ |
1743 | arr[n++] = 0; /* Reserved */ |
1744 | arr[n++] = 0; /* Reserved */ |
1745 | put_unaligned_be16(port_a, arr + n); |
1746 | n += 2; |
1747 | arr[n++] = 3; /* Port unavailable */ |
1748 | arr[n++] = 0x08; /* claim: only unavailalbe paths are supported */ |
1749 | put_unaligned_be16(port_group_b, arr + n); |
1750 | n += 2; |
1751 | arr[n++] = 0; /* Reserved */ |
1752 | arr[n++] = 0; /* Status code */ |
1753 | arr[n++] = 0; /* Vendor unique */ |
1754 | arr[n++] = 0x1; /* One port per group */ |
1755 | arr[n++] = 0; /* Reserved */ |
1756 | arr[n++] = 0; /* Reserved */ |
1757 | put_unaligned_be16(port_b, arr + n); |
1758 | n += 2; |
1759 | |
1760 | rlen = n - 4; |
1761 | put_unaligned_be32(rlen, arr + 0); |
1762 | |
1763 | /* |
1764 | * Return the smallest value of either |
1765 | * - The allocated length |
1766 | * - The constructed command length |
1767 | * - The maximum array size |
1768 | */ |
1769 | rlen = min(alen,n); |
1770 | ret = fill_from_dev_buffer(scp, arr, |
1771 | min(rlen, SDEBUG_MAX_TGTPGS_ARR_SZ)); |
1772 | kfree(arr); |
1773 | return ret; |
1774 | } |
1775 | |
1776 | static int resp_rsup_opcodes(struct scsi_cmnd *scp, |
1777 | struct sdebug_dev_info *devip) |
1778 | { |
1779 | bool rctd; |
1780 | u8 reporting_opts, req_opcode, sdeb_i, supp; |
1781 | u16 req_sa, u; |
1782 | u32 alloc_len, a_len; |
1783 | int k, offset, len, errsts, count, bump, na; |
1784 | const struct opcode_info_t *oip; |
1785 | const struct opcode_info_t *r_oip; |
1786 | u8 *arr; |
1787 | u8 *cmd = scp->cmnd; |
1788 | |
1789 | rctd = !!(cmd[2] & 0x80); |
1790 | reporting_opts = cmd[2] & 0x7; |
1791 | req_opcode = cmd[3]; |
1792 | req_sa = get_unaligned_be16(cmd + 4); |
1793 | alloc_len = get_unaligned_be32(cmd + 6); |
1794 | if (alloc_len < 4 || alloc_len > 0xffff) { |
1795 | mk_sense_invalid_fld(scp, SDEB_IN_CDB, 6, -1); |
1796 | return check_condition_result; |
1797 | } |
1798 | if (alloc_len > 8192) |
1799 | a_len = 8192; |
1800 | else |
1801 | a_len = alloc_len; |
1802 | arr = kzalloc((a_len < 256) ? 320 : a_len + 64, GFP_ATOMIC); |
1803 | if (NULL == arr) { |
1804 | mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC, |
1805 | INSUFF_RES_ASCQ); |
1806 | return check_condition_result; |
1807 | } |
1808 | switch (reporting_opts) { |
1809 | case 0: /* all commands */ |
1810 | /* count number of commands */ |
1811 | for (count = 0, oip = opcode_info_arr; |
1812 | oip->num_attached != 0xff; ++oip) { |
1813 | if (F_INV_OP & oip->flags) |
1814 | continue; |
1815 | count += (oip->num_attached + 1); |
1816 | } |
1817 | bump = rctd ? 20 : 8; |
1818 | put_unaligned_be32(count * bump, arr); |
1819 | for (offset = 4, oip = opcode_info_arr; |
1820 | oip->num_attached != 0xff && offset < a_len; ++oip) { |
1821 | if (F_INV_OP & oip->flags) |
1822 | continue; |
1823 | na = oip->num_attached; |
1824 | arr[offset] = oip->opcode; |
1825 | put_unaligned_be16(oip->sa, arr + offset + 2); |
1826 | if (rctd) |
1827 | arr[offset + 5] |= 0x2; |
1828 | if (FF_SA & oip->flags) |
1829 | arr[offset + 5] |= 0x1; |
1830 | put_unaligned_be16(oip->len_mask[0], arr + offset + 6); |
1831 | if (rctd) |
1832 | put_unaligned_be16(0xa, arr + offset + 8); |
1833 | r_oip = oip; |
1834 | for (k = 0, oip = oip->arrp; k < na; ++k, ++oip) { |
1835 | if (F_INV_OP & oip->flags) |
1836 | continue; |
1837 | offset += bump; |
1838 | arr[offset] = oip->opcode; |
1839 | put_unaligned_be16(oip->sa, arr + offset + 2); |
1840 | if (rctd) |
1841 | arr[offset + 5] |= 0x2; |
1842 | if (FF_SA & oip->flags) |
1843 | arr[offset + 5] |= 0x1; |
1844 | put_unaligned_be16(oip->len_mask[0], |
1845 | arr + offset + 6); |
1846 | if (rctd) |
1847 | put_unaligned_be16(0xa, |
1848 | arr + offset + 8); |
1849 | } |
1850 | oip = r_oip; |
1851 | offset += bump; |
1852 | } |
1853 | break; |
1854 | case 1: /* one command: opcode only */ |
1855 | case 2: /* one command: opcode plus service action */ |
1856 | case 3: /* one command: if sa==0 then opcode only else opcode+sa */ |
1857 | sdeb_i = opcode_ind_arr[req_opcode]; |
1858 | oip = &opcode_info_arr[sdeb_i]; |
1859 | if (F_INV_OP & oip->flags) { |
1860 | supp = 1; |
1861 | offset = 4; |
1862 | } else { |
1863 | if (1 == reporting_opts) { |
1864 | if (FF_SA & oip->flags) { |
1865 | mk_sense_invalid_fld(scp, SDEB_IN_CDB, |
1866 | 2, 2); |
1867 | kfree(arr); |
1868 | return check_condition_result; |
1869 | } |
1870 | req_sa = 0; |
1871 | } else if (2 == reporting_opts && |
1872 | 0 == (FF_SA & oip->flags)) { |
1873 | mk_sense_invalid_fld(scp, SDEB_IN_CDB, 4, -1); |
1874 | kfree(arr); /* point at requested sa */ |
1875 | return check_condition_result; |
1876 | } |
1877 | if (0 == (FF_SA & oip->flags) && |
1878 | req_opcode == oip->opcode) |
1879 | supp = 3; |
1880 | else if (0 == (FF_SA & oip->flags)) { |
1881 | na = oip->num_attached; |
1882 | for (k = 0, oip = oip->arrp; k < na; |
1883 | ++k, ++oip) { |
1884 | if (req_opcode == oip->opcode) |
1885 | break; |
1886 | } |
1887 | supp = (k >= na) ? 1 : 3; |
1888 | } else if (req_sa != oip->sa) { |
1889 | na = oip->num_attached; |
1890 | for (k = 0, oip = oip->arrp; k < na; |
1891 | ++k, ++oip) { |
1892 | if (req_sa == oip->sa) |
1893 | break; |
1894 | } |
1895 | supp = (k >= na) ? 1 : 3; |
1896 | } else |
1897 | supp = 3; |
1898 | if (3 == supp) { |
1899 | u = oip->len_mask[0]; |
1900 | put_unaligned_be16(u, arr + 2); |
1901 | arr[4] = oip->opcode; |
1902 | for (k = 1; k < u; ++k) |
1903 | arr[4 + k] = (k < 16) ? |
1904 | oip->len_mask[k] : 0xff; |
1905 | offset = 4 + u; |
1906 | } else |
1907 | offset = 4; |
1908 | } |
1909 | arr[1] = (rctd ? 0x80 : 0) | supp; |
1910 | if (rctd) { |
1911 | put_unaligned_be16(0xa, arr + offset); |
1912 | offset += 12; |
1913 | } |
1914 | break; |
1915 | default: |
1916 | mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 2); |
1917 | kfree(arr); |
1918 | return check_condition_result; |
1919 | } |
1920 | offset = (offset < a_len) ? offset : a_len; |
1921 | len = (offset < alloc_len) ? offset : alloc_len; |
1922 | errsts = fill_from_dev_buffer(scp, arr, len); |
1923 | kfree(arr); |
1924 | return errsts; |
1925 | } |
1926 | |
1927 | static int resp_rsup_tmfs(struct scsi_cmnd *scp, |
1928 | struct sdebug_dev_info *devip) |
1929 | { |
1930 | bool repd; |
1931 | u32 alloc_len, len; |
1932 | u8 arr[16]; |
1933 | u8 *cmd = scp->cmnd; |
1934 | |
1935 | memset(arr, 0, sizeof(arr)); |
1936 | repd = !!(cmd[2] & 0x80); |
1937 | alloc_len = get_unaligned_be32(cmd + 6); |
1938 | if (alloc_len < 4) { |
1939 | mk_sense_invalid_fld(scp, SDEB_IN_CDB, 6, -1); |
1940 | return check_condition_result; |
1941 | } |
1942 | arr[0] = 0xc8; /* ATS | ATSS | LURS */ |
1943 | arr[1] = 0x1; /* ITNRS */ |
1944 | if (repd) { |
1945 | arr[3] = 0xc; |
1946 | len = 16; |
1947 | } else |
1948 | len = 4; |
1949 | |
1950 | len = (len < alloc_len) ? len : alloc_len; |
1951 | return fill_from_dev_buffer(scp, arr, len); |
1952 | } |
1953 | |
1954 | /* <<Following mode page info copied from ST318451LW>> */ |
1955 | |
1956 | static int resp_err_recov_pg(unsigned char *p, int pcontrol, int target) |
1957 | { /* Read-Write Error Recovery page for mode_sense */ |
1958 | unsigned char err_recov_pg[] = {0x1, 0xa, 0xc0, 11, 240, 0, 0, 0, |
1959 | 5, 0, 0xff, 0xff}; |
1960 | |
1961 | memcpy(p, err_recov_pg, sizeof(err_recov_pg)); |
1962 | if (1 == pcontrol) |
1963 | memset(p + 2, 0, sizeof(err_recov_pg) - 2); |
1964 | return sizeof(err_recov_pg); |
1965 | } |
1966 | |
1967 | static int resp_disconnect_pg(unsigned char *p, int pcontrol, int target) |
1968 | { /* Disconnect-Reconnect page for mode_sense */ |
1969 | unsigned char disconnect_pg[] = {0x2, 0xe, 128, 128, 0, 10, 0, 0, |
1970 | 0, 0, 0, 0, 0, 0, 0, 0}; |
1971 | |
1972 | memcpy(p, disconnect_pg, sizeof(disconnect_pg)); |
1973 | if (1 == pcontrol) |
1974 | memset(p + 2, 0, sizeof(disconnect_pg) - 2); |
1975 | return sizeof(disconnect_pg); |
1976 | } |
1977 | |
1978 | static int resp_format_pg(unsigned char *p, int pcontrol, int target) |
1979 | { /* Format device page for mode_sense */ |
1980 | unsigned char format_pg[] = {0x3, 0x16, 0, 0, 0, 0, 0, 0, |
1981 | 0, 0, 0, 0, 0, 0, 0, 0, |
1982 | 0, 0, 0, 0, 0x40, 0, 0, 0}; |
1983 | |
1984 | memcpy(p, format_pg, sizeof(format_pg)); |
1985 | put_unaligned_be16(sdebug_sectors_per, p + 10); |
1986 | put_unaligned_be16(sdebug_sector_size, p + 12); |
1987 | if (sdebug_removable) |
1988 | p[20] |= 0x20; /* should agree with INQUIRY */ |
1989 | if (1 == pcontrol) |
1990 | memset(p + 2, 0, sizeof(format_pg) - 2); |
1991 | return sizeof(format_pg); |
1992 | } |
1993 | |
1994 | static unsigned char caching_pg[] = {0x8, 18, 0x14, 0, 0xff, 0xff, 0, 0, |
1995 | 0xff, 0xff, 0xff, 0xff, 0x80, 0x14, 0, 0, |
1996 | 0, 0, 0, 0}; |
1997 | |
1998 | static int resp_caching_pg(unsigned char *p, int pcontrol, int target) |
1999 | { /* Caching page for mode_sense */ |
2000 | unsigned char ch_caching_pg[] = {/* 0x8, 18, */ 0x4, 0, 0, 0, 0, 0, |
2001 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}; |
2002 | unsigned char d_caching_pg[] = {0x8, 18, 0x14, 0, 0xff, 0xff, 0, 0, |
2003 | 0xff, 0xff, 0xff, 0xff, 0x80, 0x14, 0, 0, 0, 0, 0, 0}; |
2004 | |
2005 | if (SDEBUG_OPT_N_WCE & sdebug_opts) |
2006 | caching_pg[2] &= ~0x4; /* set WCE=0 (default WCE=1) */ |
2007 | memcpy(p, caching_pg, sizeof(caching_pg)); |
2008 | if (1 == pcontrol) |
2009 | memcpy(p + 2, ch_caching_pg, sizeof(ch_caching_pg)); |
2010 | else if (2 == pcontrol) |
2011 | memcpy(p, d_caching_pg, sizeof(d_caching_pg)); |
2012 | return sizeof(caching_pg); |
2013 | } |
2014 | |
2015 | static unsigned char ctrl_m_pg[] = {0xa, 10, 2, 0, 0, 0, 0, 0, |
2016 | 0, 0, 0x2, 0x4b}; |
2017 | |
2018 | static int resp_ctrl_m_pg(unsigned char *p, int pcontrol, int target) |
2019 | { /* Control mode page for mode_sense */ |
2020 | unsigned char ch_ctrl_m_pg[] = {/* 0xa, 10, */ 0x6, 0, 0, 0, 0, 0, |
2021 | 0, 0, 0, 0}; |
2022 | unsigned char d_ctrl_m_pg[] = {0xa, 10, 2, 0, 0, 0, 0, 0, |
2023 | 0, 0, 0x2, 0x4b}; |
2024 | |
2025 | if (sdebug_dsense) |
2026 | ctrl_m_pg[2] |= 0x4; |
2027 | else |
2028 | ctrl_m_pg[2] &= ~0x4; |
2029 | |
2030 | if (sdebug_ato) |
2031 | ctrl_m_pg[5] |= 0x80; /* ATO=1 */ |
2032 | |
2033 | memcpy(p, ctrl_m_pg, sizeof(ctrl_m_pg)); |
2034 | if (1 == pcontrol) |
2035 | memcpy(p + 2, ch_ctrl_m_pg, sizeof(ch_ctrl_m_pg)); |
2036 | else if (2 == pcontrol) |
2037 | memcpy(p, d_ctrl_m_pg, sizeof(d_ctrl_m_pg)); |
2038 | return sizeof(ctrl_m_pg); |
2039 | } |
2040 | |
2041 | |
2042 | static int resp_iec_m_pg(unsigned char *p, int pcontrol, int target) |
2043 | { /* Informational Exceptions control mode page for mode_sense */ |
2044 | unsigned char ch_iec_m_pg[] = {/* 0x1c, 0xa, */ 0x4, 0xf, 0, 0, 0, 0, |
2045 | 0, 0, 0x0, 0x0}; |
2046 | unsigned char d_iec_m_pg[] = {0x1c, 0xa, 0x08, 0, 0, 0, 0, 0, |
2047 | 0, 0, 0x0, 0x0}; |
2048 | |
2049 | memcpy(p, iec_m_pg, sizeof(iec_m_pg)); |
2050 | if (1 == pcontrol) |
2051 | memcpy(p + 2, ch_iec_m_pg, sizeof(ch_iec_m_pg)); |
2052 | else if (2 == pcontrol) |
2053 | memcpy(p, d_iec_m_pg, sizeof(d_iec_m_pg)); |
2054 | return sizeof(iec_m_pg); |
2055 | } |
2056 | |
2057 | static int resp_sas_sf_m_pg(unsigned char *p, int pcontrol, int target) |
2058 | { /* SAS SSP mode page - short format for mode_sense */ |
2059 | unsigned char sas_sf_m_pg[] = {0x19, 0x6, |
2060 | 0x6, 0x0, 0x7, 0xd0, 0x0, 0x0}; |
2061 | |
2062 | memcpy(p, sas_sf_m_pg, sizeof(sas_sf_m_pg)); |
2063 | if (1 == pcontrol) |
2064 | memset(p + 2, 0, sizeof(sas_sf_m_pg) - 2); |
2065 | return sizeof(sas_sf_m_pg); |
2066 | } |
2067 | |
2068 | |
2069 | static int resp_sas_pcd_m_spg(unsigned char *p, int pcontrol, int target, |
2070 | int target_dev_id) |
2071 | { /* SAS phy control and discover mode page for mode_sense */ |
2072 | unsigned char sas_pcd_m_pg[] = {0x59, 0x1, 0, 0x64, 0, 0x6, 0, 2, |
2073 | 0, 0, 0, 0, 0x10, 0x9, 0x8, 0x0, |
2074 | 0, 0, 0, 0, 0, 0, 0, 0, /* insert SAS addr */ |
2075 | 0, 0, 0, 0, 0, 0, 0, 0, /* insert SAS addr */ |
2076 | 0x2, 0, 0, 0, 0, 0, 0, 0, |
2077 | 0x88, 0x99, 0, 0, 0, 0, 0, 0, |
2078 | 0, 0, 0, 0, 0, 0, 0, 0, |
2079 | 0, 1, 0, 0, 0x10, 0x9, 0x8, 0x0, |
2080 | 0, 0, 0, 0, 0, 0, 0, 0, /* insert SAS addr */ |
2081 | 0, 0, 0, 0, 0, 0, 0, 0, /* insert SAS addr */ |
2082 | 0x3, 0, 0, 0, 0, 0, 0, 0, |
2083 | 0x88, 0x99, 0, 0, 0, 0, 0, 0, |
2084 | 0, 0, 0, 0, 0, 0, 0, 0, |
2085 | }; |
2086 | int port_a, port_b; |
2087 | |
2088 | put_unaligned_be64(naa3_comp_a, sas_pcd_m_pg + 16); |
2089 | put_unaligned_be64(naa3_comp_c + 1, sas_pcd_m_pg + 24); |
2090 | put_unaligned_be64(naa3_comp_a, sas_pcd_m_pg + 64); |
2091 | put_unaligned_be64(naa3_comp_c + 1, sas_pcd_m_pg + 72); |
2092 | port_a = target_dev_id + 1; |
2093 | port_b = port_a + 1; |
2094 | memcpy(p, sas_pcd_m_pg, sizeof(sas_pcd_m_pg)); |
2095 | put_unaligned_be32(port_a, p + 20); |
2096 | put_unaligned_be32(port_b, p + 48 + 20); |
2097 | if (1 == pcontrol) |
2098 | memset(p + 4, 0, sizeof(sas_pcd_m_pg) - 4); |
2099 | return sizeof(sas_pcd_m_pg); |
2100 | } |
2101 | |
2102 | static int resp_sas_sha_m_spg(unsigned char *p, int pcontrol) |
2103 | { /* SAS SSP shared protocol specific port mode subpage */ |
2104 | unsigned char sas_sha_m_pg[] = {0x59, 0x2, 0, 0xc, 0, 0x6, 0x10, 0, |
2105 | 0, 0, 0, 0, 0, 0, 0, 0, |
2106 | }; |
2107 | |
2108 | memcpy(p, sas_sha_m_pg, sizeof(sas_sha_m_pg)); |
2109 | if (1 == pcontrol) |
2110 | memset(p + 4, 0, sizeof(sas_sha_m_pg) - 4); |
2111 | return sizeof(sas_sha_m_pg); |
2112 | } |
2113 | |
2114 | #define SDEBUG_MAX_MSENSE_SZ 256 |
2115 | |
2116 | static int resp_mode_sense(struct scsi_cmnd *scp, |
2117 | struct sdebug_dev_info *devip) |
2118 | { |
2119 | int pcontrol, pcode, subpcode, bd_len; |
2120 | unsigned char dev_spec; |
2121 | int alloc_len, offset, len, target_dev_id; |
2122 | int target = scp->device->id; |
2123 | unsigned char *ap; |
2124 | unsigned char arr[SDEBUG_MAX_MSENSE_SZ]; |
2125 | unsigned char *cmd = scp->cmnd; |
2126 | bool dbd, llbaa, msense_6, is_disk, bad_pcode; |
2127 | |
2128 | dbd = !!(cmd[1] & 0x8); /* disable block descriptors */ |
2129 | pcontrol = (cmd[2] & 0xc0) >> 6; |
2130 | pcode = cmd[2] & 0x3f; |
2131 | subpcode = cmd[3]; |
2132 | msense_6 = (MODE_SENSE == cmd[0]); |
2133 | llbaa = msense_6 ? false : !!(cmd[1] & 0x10); |
2134 | is_disk = (sdebug_ptype == TYPE_DISK); |
2135 | if (is_disk && !dbd) |
2136 | bd_len = llbaa ? 16 : 8; |
2137 | else |
2138 | bd_len = 0; |
2139 | alloc_len = msense_6 ? cmd[4] : get_unaligned_be16(cmd + 7); |
2140 | memset(arr, 0, SDEBUG_MAX_MSENSE_SZ); |
2141 | if (0x3 == pcontrol) { /* Saving values not supported */ |
2142 | mk_sense_buffer(scp, ILLEGAL_REQUEST, SAVING_PARAMS_UNSUP, 0); |
2143 | return check_condition_result; |
2144 | } |
2145 | target_dev_id = ((devip->sdbg_host->shost->host_no + 1) * 2000) + |
2146 | (devip->target * 1000) - 3; |
2147 | /* for disks set DPOFUA bit and clear write protect (WP) bit */ |
2148 | if (is_disk) { |
2149 | dev_spec = 0x10; /* =0x90 if WP=1 implies read-only */ |
2150 | if (sdebug_wp) |
2151 | dev_spec |= 0x80; |
2152 | } else |
2153 | dev_spec = 0x0; |
2154 | if (msense_6) { |
2155 | arr[2] = dev_spec; |
2156 | arr[3] = bd_len; |
2157 | offset = 4; |
2158 | } else { |
2159 | arr[3] = dev_spec; |
2160 | if (16 == bd_len) |
2161 | arr[4] = 0x1; /* set LONGLBA bit */ |
2162 | arr[7] = bd_len; /* assume 255 or less */ |
2163 | offset = 8; |
2164 | } |
2165 | ap = arr + offset; |
2166 | if ((bd_len > 0) && (!sdebug_capacity)) |
2167 | sdebug_capacity = get_sdebug_capacity(); |
2168 | |
2169 | if (8 == bd_len) { |
2170 | if (sdebug_capacity > 0xfffffffe) |
2171 | put_unaligned_be32(0xffffffff, ap + 0); |
2172 | else |
2173 | put_unaligned_be32(sdebug_capacity, ap + 0); |
2174 | put_unaligned_be16(sdebug_sector_size, ap + 6); |
2175 | offset += bd_len; |
2176 | ap = arr + offset; |
2177 | } else if (16 == bd_len) { |
2178 | put_unaligned_be64((u64)sdebug_capacity, ap + 0); |
2179 | put_unaligned_be32(sdebug_sector_size, ap + 12); |
2180 | offset += bd_len; |
2181 | ap = arr + offset; |
2182 | } |
2183 | |
2184 | if ((subpcode > 0x0) && (subpcode < 0xff) && (0x19 != pcode)) { |
2185 | /* TODO: Control Extension page */ |
2186 | mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1); |
2187 | return check_condition_result; |
2188 | } |
2189 | bad_pcode = false; |
2190 | |
2191 | switch (pcode) { |
2192 | case 0x1: /* Read-Write error recovery page, direct access */ |
2193 | len = resp_err_recov_pg(ap, pcontrol, target); |
2194 | offset += len; |
2195 | break; |
2196 | case 0x2: /* Disconnect-Reconnect page, all devices */ |
2197 | len = resp_disconnect_pg(ap, pcontrol, target); |
2198 | offset += len; |
2199 | break; |
2200 | case 0x3: /* Format device page, direct access */ |
2201 | if (is_disk) { |
2202 | len = resp_format_pg(ap, pcontrol, target); |
2203 | offset += len; |
2204 | } else |
2205 | bad_pcode = true; |
2206 | break; |
2207 | case 0x8: /* Caching page, direct access */ |
2208 | if (is_disk) { |
2209 | len = resp_caching_pg(ap, pcontrol, target); |
2210 | offset += len; |
2211 | } else |
2212 | bad_pcode = true; |
2213 | break; |
2214 | case 0xa: /* Control Mode page, all devices */ |
2215 | len = resp_ctrl_m_pg(ap, pcontrol, target); |
2216 | offset += len; |
2217 | break; |
2218 | case 0x19: /* if spc==1 then sas phy, control+discover */ |
2219 | if ((subpcode > 0x2) && (subpcode < 0xff)) { |
2220 | mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1); |
2221 | return check_condition_result; |
2222 | } |
2223 | len = 0; |
2224 | if ((0x0 == subpcode) || (0xff == subpcode)) |
2225 | len += resp_sas_sf_m_pg(ap + len, pcontrol, target); |
2226 | if ((0x1 == subpcode) || (0xff == subpcode)) |
2227 | len += resp_sas_pcd_m_spg(ap + len, pcontrol, target, |
2228 | target_dev_id); |
2229 | if ((0x2 == subpcode) || (0xff == subpcode)) |
2230 | len += resp_sas_sha_m_spg(ap + len, pcontrol); |
2231 | offset += len; |
2232 | break; |
2233 | case 0x1c: /* Informational Exceptions Mode page, all devices */ |
2234 | len = resp_iec_m_pg(ap, pcontrol, target); |
2235 | offset += len; |
2236 | break; |
2237 | case 0x3f: /* Read all Mode pages */ |
2238 | if ((0 == subpcode) || (0xff == subpcode)) { |
2239 | len = resp_err_recov_pg(ap, pcontrol, target); |
2240 | len += resp_disconnect_pg(ap + len, pcontrol, target); |
2241 | if (is_disk) { |
2242 | len += resp_format_pg(ap + len, pcontrol, |
2243 | target); |
2244 | len += resp_caching_pg(ap + len, pcontrol, |
2245 | target); |
2246 | } |
2247 | len += resp_ctrl_m_pg(ap + len, pcontrol, target); |
2248 | len += resp_sas_sf_m_pg(ap + len, pcontrol, target); |
2249 | if (0xff == subpcode) { |
2250 | len += resp_sas_pcd_m_spg(ap + len, pcontrol, |
2251 | target, target_dev_id); |
2252 | len += resp_sas_sha_m_spg(ap + len, pcontrol); |
2253 | } |
2254 | len += resp_iec_m_pg(ap + len, pcontrol, target); |
2255 | offset += len; |
2256 | } else { |
2257 | mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1); |
2258 | return check_condition_result; |
2259 | } |
2260 | break; |
2261 | default: |
2262 | bad_pcode = true; |
2263 | break; |
2264 | } |
2265 | if (bad_pcode) { |
2266 | mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 5); |
2267 | return check_condition_result; |
2268 | } |
2269 | if (msense_6) |
2270 | arr[0] = offset - 1; |
2271 | else |
2272 | put_unaligned_be16((offset - 2), arr + 0); |
2273 | return fill_from_dev_buffer(scp, arr, min(alloc_len, offset)); |
2274 | } |
2275 | |
2276 | #define SDEBUG_MAX_MSELECT_SZ 512 |
2277 | |
2278 | static int resp_mode_select(struct scsi_cmnd *scp, |
2279 | struct sdebug_dev_info *devip) |
2280 | { |
2281 | int pf, sp, ps, md_len, bd_len, off, spf, pg_len; |
2282 | int param_len, res, mpage; |
2283 | unsigned char arr[SDEBUG_MAX_MSELECT_SZ]; |
2284 | unsigned char *cmd = scp->cmnd; |
2285 | int mselect6 = (MODE_SELECT == cmd[0]); |
2286 | |
2287 | memset(arr, 0, sizeof(arr)); |
2288 | pf = cmd[1] & 0x10; |
2289 | sp = cmd[1] & 0x1; |
2290 | param_len = mselect6 ? cmd[4] : get_unaligned_be16(cmd + 7); |
2291 | if ((0 == pf) || sp || (param_len > SDEBUG_MAX_MSELECT_SZ)) { |
2292 | mk_sense_invalid_fld(scp, SDEB_IN_CDB, mselect6 ? 4 : 7, -1); |
2293 | return check_condition_result; |
2294 | } |
2295 | res = fetch_to_dev_buffer(scp, arr, param_len); |
2296 | if (-1 == res) |
2297 | return DID_ERROR << 16; |
2298 | else if (sdebug_verbose && (res < param_len)) |
2299 | sdev_printk(KERN_INFO, scp->device, |
2300 | "%s: cdb indicated=%d, IO sent=%d bytes\n" , |
2301 | __func__, param_len, res); |
2302 | md_len = mselect6 ? (arr[0] + 1) : (get_unaligned_be16(arr + 0) + 2); |
2303 | bd_len = mselect6 ? arr[3] : get_unaligned_be16(arr + 6); |
2304 | if (md_len > 2) { |
2305 | mk_sense_invalid_fld(scp, SDEB_IN_DATA, 0, -1); |
2306 | return check_condition_result; |
2307 | } |
2308 | off = bd_len + (mselect6 ? 4 : 8); |
2309 | mpage = arr[off] & 0x3f; |
2310 | ps = !!(arr[off] & 0x80); |
2311 | if (ps) { |
2312 | mk_sense_invalid_fld(scp, SDEB_IN_DATA, off, 7); |
2313 | return check_condition_result; |
2314 | } |
2315 | spf = !!(arr[off] & 0x40); |
2316 | pg_len = spf ? (get_unaligned_be16(arr + off + 2) + 4) : |
2317 | (arr[off + 1] + 2); |
2318 | if ((pg_len + off) > param_len) { |
2319 | mk_sense_buffer(scp, ILLEGAL_REQUEST, |
2320 | PARAMETER_LIST_LENGTH_ERR, 0); |
2321 | return check_condition_result; |
2322 | } |
2323 | switch (mpage) { |
2324 | case 0x8: /* Caching Mode page */ |
2325 | if (caching_pg[1] == arr[off + 1]) { |
2326 | memcpy(caching_pg + 2, arr + off + 2, |
2327 | sizeof(caching_pg) - 2); |
2328 | goto set_mode_changed_ua; |
2329 | } |
2330 | break; |
2331 | case 0xa: /* Control Mode page */ |
2332 | if (ctrl_m_pg[1] == arr[off + 1]) { |
2333 | memcpy(ctrl_m_pg + 2, arr + off + 2, |
2334 | sizeof(ctrl_m_pg) - 2); |
2335 | if (ctrl_m_pg[4] & 0x8) |
2336 | sdebug_wp = true; |
2337 | else |
2338 | sdebug_wp = false; |
2339 | sdebug_dsense = !!(ctrl_m_pg[2] & 0x4); |
2340 | goto set_mode_changed_ua; |
2341 | } |
2342 | break; |
2343 | case 0x1c: /* Informational Exceptions Mode page */ |
2344 | if (iec_m_pg[1] == arr[off + 1]) { |
2345 | memcpy(iec_m_pg + 2, arr + off + 2, |
2346 | sizeof(iec_m_pg) - 2); |
2347 | goto set_mode_changed_ua; |
2348 | } |
2349 | break; |
2350 | default: |
2351 | break; |
2352 | } |
2353 | mk_sense_invalid_fld(scp, SDEB_IN_DATA, off, 5); |
2354 | return check_condition_result; |
2355 | set_mode_changed_ua: |
2356 | set_bit(SDEBUG_UA_MODE_CHANGED, devip->uas_bm); |
2357 | return 0; |
2358 | } |
2359 | |
2360 | static int resp_temp_l_pg(unsigned char *arr) |
2361 | { |
2362 | unsigned char temp_l_pg[] = {0x0, 0x0, 0x3, 0x2, 0x0, 38, |
2363 | 0x0, 0x1, 0x3, 0x2, 0x0, 65, |
2364 | }; |
2365 | |
2366 | memcpy(arr, temp_l_pg, sizeof(temp_l_pg)); |
2367 | return sizeof(temp_l_pg); |
2368 | } |
2369 | |
2370 | static int resp_ie_l_pg(unsigned char *arr) |
2371 | { |
2372 | unsigned char ie_l_pg[] = {0x0, 0x0, 0x3, 0x3, 0x0, 0x0, 38, |
2373 | }; |
2374 | |
2375 | memcpy(arr, ie_l_pg, sizeof(ie_l_pg)); |
2376 | if (iec_m_pg[2] & 0x4) { /* TEST bit set */ |
2377 | arr[4] = THRESHOLD_EXCEEDED; |
2378 | arr[5] = 0xff; |
2379 | } |
2380 | return sizeof(ie_l_pg); |
2381 | } |
2382 | |
2383 | #define SDEBUG_MAX_LSENSE_SZ 512 |
2384 | |
2385 | static int resp_log_sense(struct scsi_cmnd *scp, |
2386 | struct sdebug_dev_info *devip) |
2387 | { |
2388 | int ppc, sp, pcode, subpcode, alloc_len, len, n; |
2389 | unsigned char arr[SDEBUG_MAX_LSENSE_SZ]; |
2390 | unsigned char *cmd = scp->cmnd; |
2391 | |
2392 | memset(arr, 0, sizeof(arr)); |
2393 | ppc = cmd[1] & 0x2; |
2394 | sp = cmd[1] & 0x1; |
2395 | if (ppc || sp) { |
2396 | mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, ppc ? 1 : 0); |
2397 | return check_condition_result; |
2398 | } |
2399 | pcode = cmd[2] & 0x3f; |
2400 | subpcode = cmd[3] & 0xff; |
2401 | alloc_len = get_unaligned_be16(cmd + 7); |
2402 | arr[0] = pcode; |
2403 | if (0 == subpcode) { |
2404 | switch (pcode) { |
2405 | case 0x0: /* Supported log pages log page */ |
2406 | n = 4; |
2407 | arr[n++] = 0x0; /* this page */ |
2408 | arr[n++] = 0xd; /* Temperature */ |
2409 | arr[n++] = 0x2f; /* Informational exceptions */ |
2410 | arr[3] = n - 4; |
2411 | break; |
2412 | case 0xd: /* Temperature log page */ |
2413 | arr[3] = resp_temp_l_pg(arr + 4); |
2414 | break; |
2415 | case 0x2f: /* Informational exceptions log page */ |
2416 | arr[3] = resp_ie_l_pg(arr + 4); |
2417 | break; |
2418 | default: |
2419 | mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 5); |
2420 | return check_condition_result; |
2421 | } |
2422 | } else if (0xff == subpcode) { |
2423 | arr[0] |= 0x40; |
2424 | arr[1] = subpcode; |
2425 | switch (pcode) { |
2426 | case 0x0: /* Supported log pages and subpages log page */ |
2427 | n = 4; |
2428 | arr[n++] = 0x0; |
2429 | arr[n++] = 0x0; /* 0,0 page */ |
2430 | arr[n++] = 0x0; |
2431 | arr[n++] = 0xff; /* this page */ |
2432 | arr[n++] = 0xd; |
2433 | arr[n++] = 0x0; /* Temperature */ |
2434 | arr[n++] = 0x2f; |
2435 | arr[n++] = 0x0; /* Informational exceptions */ |
2436 | arr[3] = n - 4; |
2437 | break; |
2438 | case 0xd: /* Temperature subpages */ |
2439 | n = 4; |
2440 | arr[n++] = 0xd; |
2441 | arr[n++] = 0x0; /* Temperature */ |
2442 | arr[3] = n - 4; |
2443 | break; |
2444 | case 0x2f: /* Informational exceptions subpages */ |
2445 | n = 4; |
2446 | arr[n++] = 0x2f; |
2447 | arr[n++] = 0x0; /* Informational exceptions */ |
2448 | arr[3] = n - 4; |
2449 | break; |
2450 | default: |
2451 | mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 5); |
2452 | return check_condition_result; |
2453 | } |
2454 | } else { |
2455 | mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1); |
2456 | return check_condition_result; |
2457 | } |
2458 | len = min(get_unaligned_be16(arr + 2) + 4, alloc_len); |
2459 | return fill_from_dev_buffer(scp, arr, |
2460 | min(len, SDEBUG_MAX_INQ_ARR_SZ)); |
2461 | } |
2462 | |
2463 | static inline int check_device_access_params(struct scsi_cmnd *scp, |
2464 | unsigned long long lba, unsigned int num, bool write) |
2465 | { |
2466 | if (lba + num > sdebug_capacity) { |
2467 | mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0); |
2468 | return check_condition_result; |
2469 | } |
2470 | /* transfer length excessive (tie in to block limits VPD page) */ |
2471 | if (num > sdebug_store_sectors) { |
2472 | /* needs work to find which cdb byte 'num' comes from */ |
2473 | mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0); |
2474 | return check_condition_result; |
2475 | } |
2476 | if (write && unlikely(sdebug_wp)) { |
2477 | mk_sense_buffer(scp, DATA_PROTECT, WRITE_PROTECTED, 0x2); |
2478 | return check_condition_result; |
2479 | } |
2480 | return 0; |
2481 | } |
2482 | |
2483 | /* Returns number of bytes copied or -1 if error. */ |
2484 | static int do_device_access(struct scsi_cmnd *scmd, u32 sg_skip, u64 lba, |
2485 | u32 num, bool do_write) |
2486 | { |
2487 | int ret; |
2488 | u64 block, rest = 0; |
2489 | struct scsi_data_buffer *sdb = &scmd->sdb; |
2490 | enum dma_data_direction dir; |
2491 | |
2492 | if (do_write) { |
2493 | dir = DMA_TO_DEVICE; |
2494 | write_since_sync = true; |
2495 | } else { |
2496 | dir = DMA_FROM_DEVICE; |
2497 | } |
2498 | |
2499 | if (!sdb->length) |
2500 | return 0; |
2501 | if (scmd->sc_data_direction != dir) |
2502 | return -1; |
2503 | |
2504 | block = do_div(lba, sdebug_store_sectors); |
2505 | if (block + num > sdebug_store_sectors) |
2506 | rest = block + num - sdebug_store_sectors; |
2507 | |
2508 | ret = sg_copy_buffer(sdb->table.sgl, sdb->table.nents, |
2509 | fake_storep + (block * sdebug_sector_size), |
2510 | (num - rest) * sdebug_sector_size, sg_skip, do_write); |
2511 | if (ret != (num - rest) * sdebug_sector_size) |
2512 | return ret; |
2513 | |
2514 | if (rest) { |
2515 | ret += sg_copy_buffer(sdb->table.sgl, sdb->table.nents, |
2516 | fake_storep, rest * sdebug_sector_size, |
2517 | sg_skip + ((num - rest) * sdebug_sector_size), |
2518 | do_write); |
2519 | } |
2520 | |
2521 | return ret; |
2522 | } |
2523 | |
2524 | /* If lba2fake_store(lba,num) compares equal to arr(num), then copy top half of |
2525 | * arr into lba2fake_store(lba,num) and return true. If comparison fails then |
2526 | * return false. */ |
2527 | static bool comp_write_worker(u64 lba, u32 num, const u8 *arr) |
2528 | { |
2529 | bool res; |
2530 | u64 block, rest = 0; |
2531 | u32 store_blks = sdebug_store_sectors; |
2532 | u32 lb_size = sdebug_sector_size; |
2533 | |
2534 | block = do_div(lba, store_blks); |
2535 | if (block + num > store_blks) |
2536 | rest = block + num - store_blks; |
2537 | |
2538 | res = !memcmp(fake_storep + (block * lb_size), arr, |
2539 | (num - rest) * lb_size); |
2540 | if (!res) |
2541 | return res; |
2542 | if (rest) |
2543 | res = memcmp(fake_storep, arr + ((num - rest) * lb_size), |
2544 | rest * lb_size); |
2545 | if (!res) |
2546 | return res; |
2547 | arr += num * lb_size; |
2548 | memcpy(fake_storep + (block * lb_size), arr, (num - rest) * lb_size); |
2549 | if (rest) |
2550 | memcpy(fake_storep, arr + ((num - rest) * lb_size), |
2551 | rest * lb_size); |
2552 | return res; |
2553 | } |
2554 | |
2555 | static __be16 dif_compute_csum(const void *buf, int len) |
2556 | { |
2557 | __be16 csum; |
2558 | |
2559 | if (sdebug_guard) |
2560 | csum = (__force __be16)ip_compute_csum(buf, len); |
2561 | else |
2562 | csum = cpu_to_be16(crc_t10dif(buf, len)); |
2563 | |
2564 | return csum; |
2565 | } |
2566 | |
2567 | static int dif_verify(struct t10_pi_tuple *sdt, const void *data, |
2568 | sector_t sector, u32 ei_lba) |
2569 | { |
2570 | __be16 csum = dif_compute_csum(data, sdebug_sector_size); |
2571 | |
2572 | if (sdt->guard_tag != csum) { |
2573 | pr_err("GUARD check failed on sector %lu rcvd 0x%04x, data 0x%04x\n" , |
2574 | (unsigned long)sector, |
2575 | be16_to_cpu(sdt->guard_tag), |
2576 | be16_to_cpu(csum)); |
2577 | return 0x01; |
2578 | } |
2579 | if (sdebug_dif == T10_PI_TYPE1_PROTECTION && |
2580 | be32_to_cpu(sdt->ref_tag) != (sector & 0xffffffff)) { |
2581 | pr_err("REF check failed on sector %lu\n" , |
2582 | (unsigned long)sector); |
2583 | return 0x03; |
2584 | } |
2585 | if (sdebug_dif == T10_PI_TYPE2_PROTECTION && |
2586 | be32_to_cpu(sdt->ref_tag) != ei_lba) { |
2587 | pr_err("REF check failed on sector %lu\n" , |
2588 | (unsigned long)sector); |
2589 | return 0x03; |
2590 | } |
2591 | return 0; |
2592 | } |
2593 | |
2594 | static void dif_copy_prot(struct scsi_cmnd *SCpnt, sector_t sector, |
2595 | unsigned int sectors, bool read) |
2596 | { |
2597 | size_t resid; |
2598 | void *paddr; |
2599 | const void *dif_store_end = dif_storep + sdebug_store_sectors; |
2600 | struct sg_mapping_iter miter; |
2601 | |
2602 | /* Bytes of protection data to copy into sgl */ |
2603 | resid = sectors * sizeof(*dif_storep); |
2604 | |
2605 | sg_miter_start(&miter, scsi_prot_sglist(SCpnt), |
2606 | scsi_prot_sg_count(SCpnt), SG_MITER_ATOMIC | |
2607 | (read ? SG_MITER_TO_SG : SG_MITER_FROM_SG)); |
2608 | |
2609 | while (sg_miter_next(&miter) && resid > 0) { |
2610 | size_t len = min(miter.length, resid); |
2611 | void *start = dif_store(sector); |
2612 | size_t rest = 0; |
2613 | |
2614 | if (dif_store_end < start + len) |
2615 | rest = start + len - dif_store_end; |
2616 | |
2617 | paddr = miter.addr; |
2618 | |
2619 | if (read) |
2620 | memcpy(paddr, start, len - rest); |
2621 | else |
2622 | memcpy(start, paddr, len - rest); |
2623 | |
2624 | if (rest) { |
2625 | if (read) |
2626 | memcpy(paddr + len - rest, dif_storep, rest); |
2627 | else |
2628 | memcpy(dif_storep, paddr + len - rest, rest); |
2629 | } |
2630 | |
2631 | sector += len / sizeof(*dif_storep); |
2632 | resid -= len; |
2633 | } |
2634 | sg_miter_stop(&miter); |
2635 | } |
2636 | |
2637 | static int prot_verify_read(struct scsi_cmnd *SCpnt, sector_t start_sec, |
2638 | unsigned int sectors, u32 ei_lba) |
2639 | { |
2640 | unsigned int i; |
2641 | struct t10_pi_tuple *sdt; |
2642 | sector_t sector; |
2643 | |
2644 | for (i = 0; i < sectors; i++, ei_lba++) { |
2645 | int ret; |
2646 | |
2647 | sector = start_sec + i; |
2648 | sdt = dif_store(sector); |
2649 | |
2650 | if (sdt->app_tag == cpu_to_be16(0xffff)) |
2651 | continue; |
2652 | |
2653 | ret = dif_verify(sdt, lba2fake_store(sector), sector, ei_lba); |
2654 | if (ret) { |
2655 | dif_errors++; |
2656 | return ret; |
2657 | } |
2658 | } |
2659 | |
2660 | dif_copy_prot(SCpnt, start_sec, sectors, true); |
2661 | dix_reads++; |
2662 | |
2663 | return 0; |
2664 | } |
2665 | |
2666 | static int resp_read_dt0(struct scsi_cmnd *scp, struct sdebug_dev_info *devip) |
2667 | { |
2668 | u8 *cmd = scp->cmnd; |
2669 | struct sdebug_queued_cmd *sqcp; |
2670 | u64 lba; |
2671 | u32 num; |
2672 | u32 ei_lba; |
2673 | unsigned long iflags; |
2674 | int ret; |
2675 | bool check_prot; |
2676 | |
2677 | switch (cmd[0]) { |
2678 | case READ_16: |
2679 | ei_lba = 0; |
2680 | lba = get_unaligned_be64(cmd + 2); |
2681 | num = get_unaligned_be32(cmd + 10); |
2682 | check_prot = true; |
2683 | break; |
2684 | case READ_10: |
2685 | ei_lba = 0; |
2686 | lba = get_unaligned_be32(cmd + 2); |
2687 | num = get_unaligned_be16(cmd + 7); |
2688 | check_prot = true; |
2689 | break; |
2690 | case READ_6: |
2691 | ei_lba = 0; |
2692 | lba = (u32)cmd[3] | (u32)cmd[2] << 8 | |
2693 | (u32)(cmd[1] & 0x1f) << 16; |
2694 | num = (0 == cmd[4]) ? 256 : cmd[4]; |
2695 | check_prot = true; |
2696 | break; |
2697 | case READ_12: |
2698 | ei_lba = 0; |
2699 | lba = get_unaligned_be32(cmd + 2); |
2700 | num = get_unaligned_be32(cmd + 6); |
2701 | check_prot = true; |
2702 | break; |
2703 | case XDWRITEREAD_10: |
2704 | ei_lba = 0; |
2705 | lba = get_unaligned_be32(cmd + 2); |
2706 | num = get_unaligned_be16(cmd + 7); |
2707 | check_prot = false; |
2708 | break; |
2709 | default: /* assume READ(32) */ |
2710 | lba = get_unaligned_be64(cmd + 12); |
2711 | ei_lba = get_unaligned_be32(cmd + 20); |
2712 | num = get_unaligned_be32(cmd + 28); |
2713 | check_prot = false; |
2714 | break; |
2715 | } |
2716 | if (unlikely(have_dif_prot && check_prot)) { |
2717 | if (sdebug_dif == T10_PI_TYPE2_PROTECTION && |
2718 | (cmd[1] & 0xe0)) { |
2719 | mk_sense_invalid_opcode(scp); |
2720 | return check_condition_result; |
2721 | } |
2722 | if ((sdebug_dif == T10_PI_TYPE1_PROTECTION || |
2723 | sdebug_dif == T10_PI_TYPE3_PROTECTION) && |
2724 | (cmd[1] & 0xe0) == 0) |
2725 | sdev_printk(KERN_ERR, scp->device, "Unprotected RD " |
2726 | "to DIF device\n" ); |
2727 | } |
2728 | if (unlikely(sdebug_any_injecting_opt)) { |
2729 | sqcp = (struct sdebug_queued_cmd *)scp->host_scribble; |
2730 | |
2731 | if (sqcp) { |
2732 | if (sqcp->inj_short) |
2733 | num /= 2; |
2734 | } |
2735 | } else |
2736 | sqcp = NULL; |
2737 | |
2738 | ret = check_device_access_params(scp, lba, num, false); |
2739 | if (ret) |
2740 | return ret; |
2741 | if (unlikely((SDEBUG_OPT_MEDIUM_ERR & sdebug_opts) && |
2742 | (lba <= (sdebug_medium_error_start + sdebug_medium_error_count - 1)) && |
2743 | ((lba + num) > sdebug_medium_error_start))) { |
2744 | /* claim unrecoverable read error */ |
2745 | mk_sense_buffer(scp, MEDIUM_ERROR, UNRECOVERED_READ_ERR, 0); |
2746 | /* set info field and valid bit for fixed descriptor */ |
2747 | if (0x70 == (scp->sense_buffer[0] & 0x7f)) { |
2748 | scp->sense_buffer[0] |= 0x80; /* Valid bit */ |
2749 | ret = (lba < OPT_MEDIUM_ERR_ADDR) |
2750 | ? OPT_MEDIUM_ERR_ADDR : (int)lba; |
2751 | put_unaligned_be32(ret, scp->sense_buffer + 3); |
2752 | } |
2753 | scsi_set_resid(scp, scsi_bufflen(scp)); |
2754 | return check_condition_result; |
2755 | } |
2756 | |
2757 | read_lock_irqsave(&atomic_rw, iflags); |
2758 | |
2759 | /* DIX + T10 DIF */ |
2760 | if (unlikely(sdebug_dix && scsi_prot_sg_count(scp))) { |
2761 | int prot_ret = prot_verify_read(scp, lba, num, ei_lba); |
2762 | |
2763 | if (prot_ret) { |
2764 | read_unlock_irqrestore(&atomic_rw, iflags); |
2765 | mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, prot_ret); |
2766 | return illegal_condition_result; |
2767 | } |
2768 | } |
2769 | |
2770 | ret = do_device_access(scp, 0, lba, num, false); |
2771 | read_unlock_irqrestore(&atomic_rw, iflags); |
2772 | if (unlikely(ret == -1)) |
2773 | return DID_ERROR << 16; |
2774 | |
2775 | scsi_set_resid(scp, scsi_bufflen(scp) - ret); |
2776 | |
2777 | if (unlikely(sqcp)) { |
2778 | if (sqcp->inj_recovered) { |
2779 | mk_sense_buffer(scp, RECOVERED_ERROR, |
2780 | THRESHOLD_EXCEEDED, 0); |
2781 | return check_condition_result; |
2782 | } else if (sqcp->inj_transport) { |
2783 | mk_sense_buffer(scp, ABORTED_COMMAND, |
2784 | TRANSPORT_PROBLEM, ACK_NAK_TO); |
2785 | return check_condition_result; |
2786 | } else if (sqcp->inj_dif) { |
2787 | /* Logical block guard check failed */ |
2788 | mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 1); |
2789 | return illegal_condition_result; |
2790 | } else if (sqcp->inj_dix) { |
2791 | mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 1); |
2792 | return illegal_condition_result; |
2793 | } |
2794 | } |
2795 | return 0; |
2796 | } |
2797 | |
2798 | static void dump_sector(unsigned char *buf, int len) |
2799 | { |
2800 | int i, j, n; |
2801 | |
2802 | pr_err(">>> Sector Dump <<<\n" ); |
2803 | for (i = 0 ; i < len ; i += 16) { |
2804 | char b[128]; |
2805 | |
2806 | for (j = 0, n = 0; j < 16; j++) { |
2807 | unsigned char c = buf[i+j]; |
2808 | |
2809 | if (c >= 0x20 && c < 0x7e) |
2810 | n += scnprintf(b + n, sizeof(b) - n, |
2811 | " %c " , buf[i+j]); |
2812 | else |
2813 | n += scnprintf(b + n, sizeof(b) - n, |
2814 | "%02x " , buf[i+j]); |
2815 | } |
2816 | pr_err("%04d: %s\n" , i, b); |
2817 | } |
2818 | } |
2819 | |
2820 | static int prot_verify_write(struct scsi_cmnd *SCpnt, sector_t start_sec, |
2821 | unsigned int sectors, u32 ei_lba) |
2822 | { |
2823 | int ret; |
2824 | struct t10_pi_tuple *sdt; |
2825 | void *daddr; |
2826 | sector_t sector = start_sec; |
2827 | int ppage_offset; |
2828 | int dpage_offset; |
2829 | struct sg_mapping_iter diter; |
2830 | struct sg_mapping_iter piter; |
2831 | |
2832 | BUG_ON(scsi_sg_count(SCpnt) == 0); |
2833 | BUG_ON(scsi_prot_sg_count(SCpnt) == 0); |
2834 | |
2835 | sg_miter_start(&piter, scsi_prot_sglist(SCpnt), |
2836 | scsi_prot_sg_count(SCpnt), |
2837 | SG_MITER_ATOMIC | SG_MITER_FROM_SG); |
2838 | sg_miter_start(&diter, scsi_sglist(SCpnt), scsi_sg_count(SCpnt), |
2839 | SG_MITER_ATOMIC | SG_MITER_FROM_SG); |
2840 | |
2841 | /* For each protection page */ |
2842 | while (sg_miter_next(&piter)) { |
2843 | dpage_offset = 0; |
2844 | if (WARN_ON(!sg_miter_next(&diter))) { |
2845 | ret = 0x01; |
2846 | goto out; |
2847 | } |
2848 | |
2849 | for (ppage_offset = 0; ppage_offset < piter.length; |
2850 | ppage_offset += sizeof(struct t10_pi_tuple)) { |
2851 | /* If we're at the end of the current |
2852 | * data page advance to the next one |
2853 | */ |
2854 | if (dpage_offset >= diter.length) { |
2855 | if (WARN_ON(!sg_miter_next(&diter))) { |
2856 | ret = 0x01; |
2857 | goto out; |
2858 | } |
2859 | dpage_offset = 0; |
2860 | } |
2861 | |
2862 | sdt = piter.addr + ppage_offset; |
2863 | daddr = diter.addr + dpage_offset; |
2864 | |
2865 | ret = dif_verify(sdt, daddr, sector, ei_lba); |
2866 | if (ret) { |
2867 | dump_sector(daddr, sdebug_sector_size); |
2868 | goto out; |
2869 | } |
2870 | |
2871 | sector++; |
2872 | ei_lba++; |
2873 | dpage_offset += sdebug_sector_size; |
2874 | } |
2875 | diter.consumed = dpage_offset; |
2876 | sg_miter_stop(&diter); |
2877 | } |
2878 | sg_miter_stop(&piter); |
2879 | |
2880 | dif_copy_prot(SCpnt, start_sec, sectors, false); |
2881 | dix_writes++; |
2882 | |
2883 | return 0; |
2884 | |
2885 | out: |
2886 | dif_errors++; |
2887 | sg_miter_stop(&diter); |
2888 | sg_miter_stop(&piter); |
2889 | return ret; |
2890 | } |
2891 | |
2892 | static unsigned long lba_to_map_index(sector_t lba) |
2893 | { |
2894 | if (sdebug_unmap_alignment) |
2895 | lba += sdebug_unmap_granularity - sdebug_unmap_alignment; |
2896 | sector_div(lba, sdebug_unmap_granularity); |
2897 | return lba; |
2898 | } |
2899 | |
2900 | static sector_t map_index_to_lba(unsigned long index) |
2901 | { |
2902 | sector_t lba = index * sdebug_unmap_granularity; |
2903 | |
2904 | if (sdebug_unmap_alignment) |
2905 | lba -= sdebug_unmap_granularity - sdebug_unmap_alignment; |
2906 | return lba; |
2907 | } |
2908 | |
2909 | static unsigned int map_state(sector_t lba, unsigned int *num) |
2910 | { |
2911 | sector_t end; |
2912 | unsigned int mapped; |
2913 | unsigned long index; |
2914 | unsigned long next; |
2915 | |
2916 | index = lba_to_map_index(lba); |
2917 | mapped = test_bit(index, map_storep); |
2918 | |
2919 | if (mapped) |
2920 | next = find_next_zero_bit(map_storep, map_size, index); |
2921 | else |
2922 | next = find_next_bit(map_storep, map_size, index); |
2923 | |
2924 | end = min_t(sector_t, sdebug_store_sectors, map_index_to_lba(next)); |
2925 | *num = end - lba; |
2926 | return mapped; |
2927 | } |
2928 | |
2929 | static void map_region(sector_t lba, unsigned int len) |
2930 | { |
2931 | sector_t end = lba + len; |
2932 | |
2933 | while (lba < end) { |
2934 | unsigned long index = lba_to_map_index(lba); |
2935 | |
2936 | if (index < map_size) |
2937 | set_bit(index, map_storep); |
2938 | |
2939 | lba = map_index_to_lba(index + 1); |
2940 | } |
2941 | } |
2942 | |
2943 | static void unmap_region(sector_t lba, unsigned int len) |
2944 | { |
2945 | sector_t end = lba + len; |
2946 | |
2947 | while (lba < end) { |
2948 | unsigned long index = lba_to_map_index(lba); |
2949 | |
2950 | if (lba == map_index_to_lba(index) && |
2951 | lba + sdebug_unmap_granularity <= end && |
2952 | index < map_size) { |
2953 | clear_bit(index, map_storep); |
2954 | if (sdebug_lbprz) { /* for LBPRZ=2 return 0xff_s */ |
2955 | memset(fake_storep + |
2956 | lba * sdebug_sector_size, |
2957 | (sdebug_lbprz & 1) ? 0 : 0xff, |
2958 | sdebug_sector_size * |
2959 | sdebug_unmap_granularity); |
2960 | } |
2961 | if (dif_storep) { |
2962 | memset(dif_storep + lba, 0xff, |
2963 | sizeof(*dif_storep) * |
2964 | sdebug_unmap_granularity); |
2965 | } |
2966 | } |
2967 | lba = map_index_to_lba(index + 1); |
2968 | } |
2969 | } |
2970 | |
2971 | static int resp_write_dt0(struct scsi_cmnd *scp, struct sdebug_dev_info *devip) |
2972 | { |
2973 | u8 *cmd = scp->cmnd; |
2974 | u64 lba; |
2975 | u32 num; |
2976 | u32 ei_lba; |
2977 | unsigned long iflags; |
2978 | int ret; |
2979 | bool check_prot; |
2980 | |
2981 | switch (cmd[0]) { |
2982 | case WRITE_16: |
2983 | ei_lba = 0; |
2984 | lba = get_unaligned_be64(cmd + 2); |
2985 | num = get_unaligned_be32(cmd + 10); |
2986 | check_prot = true; |
2987 | break; |
2988 | case WRITE_10: |
2989 | ei_lba = 0; |
2990 | lba = get_unaligned_be32(cmd + 2); |
2991 | num = get_unaligned_be16(cmd + 7); |
2992 | check_prot = true; |
2993 | break; |
2994 | case WRITE_6: |
2995 | ei_lba = 0; |
2996 | lba = (u32)cmd[3] | (u32)cmd[2] << 8 | |
2997 | (u32)(cmd[1] & 0x1f) << 16; |
2998 | num = (0 == cmd[4]) ? 256 : cmd[4]; |
2999 | check_prot = true; |
3000 | break; |
3001 | case WRITE_12: |
3002 | ei_lba = 0; |
3003 | lba = get_unaligned_be32(cmd + 2); |
3004 | num = get_unaligned_be32(cmd + 6); |
3005 | check_prot = true; |
3006 | break; |
3007 | case 0x53: /* XDWRITEREAD(10) */ |
3008 | ei_lba = 0; |
3009 | lba = get_unaligned_be32(cmd + 2); |
3010 | num = get_unaligned_be16(cmd + 7); |
3011 | check_prot = false; |
3012 | break; |
3013 | default: /* assume WRITE(32) */ |
3014 | lba = get_unaligned_be64(cmd + 12); |
3015 | ei_lba = get_unaligned_be32(cmd + 20); |
3016 | num = get_unaligned_be32(cmd + 28); |
3017 | check_prot = false; |
3018 | break; |
3019 | } |
3020 | if (unlikely(have_dif_prot && check_prot)) { |
3021 | if (sdebug_dif == T10_PI_TYPE2_PROTECTION && |
3022 | (cmd[1] & 0xe0)) { |
3023 | mk_sense_invalid_opcode(scp); |
3024 | return check_condition_result; |
3025 | } |
3026 | if ((sdebug_dif == T10_PI_TYPE1_PROTECTION || |
3027 | sdebug_dif == T10_PI_TYPE3_PROTECTION) && |
3028 | (cmd[1] & 0xe0) == 0) |
3029 | sdev_printk(KERN_ERR, scp->device, "Unprotected WR " |
3030 | "to DIF device\n" ); |
3031 | } |
3032 | ret = check_device_access_params(scp, lba, num, true); |
3033 | if (ret) |
3034 | return ret; |
3035 | write_lock_irqsave(&atomic_rw, iflags); |
3036 | |
3037 | /* DIX + T10 DIF */ |
3038 | if (unlikely(sdebug_dix && scsi_prot_sg_count(scp))) { |
3039 | int prot_ret = prot_verify_write(scp, lba, num, ei_lba); |
3040 | |
3041 | if (prot_ret) { |
3042 | write_unlock_irqrestore(&atomic_rw, iflags); |
3043 | mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, prot_ret); |
3044 | return illegal_condition_result; |
3045 | } |
3046 | } |
3047 | |
3048 | ret = do_device_access(scp, 0, lba, num, true); |
3049 | if (unlikely(scsi_debug_lbp())) |
3050 | map_region(lba, num); |
3051 | write_unlock_irqrestore(&atomic_rw, iflags); |
3052 | if (unlikely(-1 == ret)) |
3053 | return DID_ERROR << 16; |
3054 | else if (unlikely(sdebug_verbose && |
3055 | (ret < (num * sdebug_sector_size)))) |
3056 | sdev_printk(KERN_INFO, scp->device, |
3057 | "%s: write: cdb indicated=%u, IO sent=%d bytes\n" , |
3058 | my_name, num * sdebug_sector_size, ret); |
3059 | |
3060 | if (unlikely(sdebug_any_injecting_opt)) { |
3061 | struct sdebug_queued_cmd *sqcp = |
3062 | (struct sdebug_queued_cmd *)scp->host_scribble; |
3063 | |
3064 | if (sqcp) { |
3065 | if (sqcp->inj_recovered) { |
3066 | mk_sense_buffer(scp, RECOVERED_ERROR, |
3067 | THRESHOLD_EXCEEDED, 0); |
3068 | return check_condition_result; |
3069 | } else if (sqcp->inj_dif) { |
3070 | /* Logical block guard check failed */ |
3071 | mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 1); |
3072 | return illegal_condition_result; |
3073 | } else if (sqcp->inj_dix) { |
3074 | mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 1); |
3075 | return illegal_condition_result; |
3076 | } |
3077 | } |
3078 | } |
3079 | return 0; |
3080 | } |
3081 | |
3082 | /* |
3083 | * T10 has only specified WRITE SCATTERED(16) and WRITE SCATTERED(32). |
3084 | * No READ GATHERED yet (requires bidi or long cdb holding gather list). |
3085 | */ |
3086 | static int resp_write_scat(struct scsi_cmnd *scp, |
3087 | struct sdebug_dev_info *devip) |
3088 | { |
3089 | u8 *cmd = scp->cmnd; |
3090 | u8 *lrdp = NULL; |
3091 | u8 *up; |
3092 | u8 wrprotect; |
3093 | u16 lbdof, num_lrd, k; |
3094 | u32 num, num_by, bt_len, lbdof_blen, sg_off, cum_lb; |
3095 | u32 lb_size = sdebug_sector_size; |
3096 | u32 ei_lba; |
3097 | u64 lba; |
3098 | unsigned long iflags; |
3099 | int ret, res; |
3100 | bool is_16; |
3101 | static const u32 lrd_size = 32; /* + parameter list header size */ |
3102 | |
3103 | if (cmd[0] == VARIABLE_LENGTH_CMD) { |
3104 | is_16 = false; |
3105 | wrprotect = (cmd[10] >> 5) & 0x7; |
3106 | lbdof = get_unaligned_be16(cmd + 12); |
3107 | num_lrd = get_unaligned_be16(cmd + 16); |
3108 | bt_len = get_unaligned_be32(cmd + 28); |
3109 | } else { /* that leaves WRITE SCATTERED(16) */ |
3110 | is_16 = true; |
3111 | wrprotect = (cmd[2] >> 5) & 0x7; |
3112 | lbdof = get_unaligned_be16(cmd + 4); |
3113 | num_lrd = get_unaligned_be16(cmd + 8); |
3114 | bt_len = get_unaligned_be32(cmd + 10); |
3115 | if (unlikely(have_dif_prot)) { |
3116 | if (sdebug_dif == T10_PI_TYPE2_PROTECTION && |
3117 | wrprotect) { |
3118 | mk_sense_invalid_opcode(scp); |
3119 | return illegal_condition_result; |
3120 | } |
3121 | if ((sdebug_dif == T10_PI_TYPE1_PROTECTION || |
3122 | sdebug_dif == T10_PI_TYPE3_PROTECTION) && |
3123 | wrprotect == 0) |
3124 | sdev_printk(KERN_ERR, scp->device, |
3125 | "Unprotected WR to DIF device\n" ); |
3126 | } |
3127 | } |
3128 | if ((num_lrd == 0) || (bt_len == 0)) |
3129 | return 0; /* T10 says these do-nothings are not errors */ |
3130 | if (lbdof == 0) { |
3131 | if (sdebug_verbose) |
3132 | sdev_printk(KERN_INFO, scp->device, |
3133 | "%s: %s: LB Data Offset field bad\n" , |
3134 | my_name, __func__); |
3135 | mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0); |
3136 | return illegal_condition_result; |
3137 | } |
3138 | lbdof_blen = lbdof * lb_size; |
3139 | if ((lrd_size + (num_lrd * lrd_size)) > lbdof_blen) { |
3140 | if (sdebug_verbose) |
3141 | sdev_printk(KERN_INFO, scp->device, |
3142 | "%s: %s: LBA range descriptors don't fit\n" , |
3143 | my_name, __func__); |
3144 | mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0); |
3145 | return illegal_condition_result; |
3146 | } |
3147 | lrdp = kzalloc(lbdof_blen, GFP_ATOMIC); |
3148 | if (lrdp == NULL) |
3149 | return SCSI_MLQUEUE_HOST_BUSY; |
3150 | if (sdebug_verbose) |
3151 | sdev_printk(KERN_INFO, scp->device, |
3152 | "%s: %s: Fetch header+scatter_list, lbdof_blen=%u\n" , |
3153 | my_name, __func__, lbdof_blen); |
3154 | res = fetch_to_dev_buffer(scp, lrdp, lbdof_blen); |
3155 | if (res == -1) { |
3156 | ret = DID_ERROR << 16; |
3157 | goto err_out; |
3158 | } |
3159 | |
3160 | write_lock_irqsave(&atomic_rw, iflags); |
3161 | sg_off = lbdof_blen; |
3162 | /* Spec says Buffer xfer Length field in number of LBs in dout */ |
3163 | cum_lb = 0; |
3164 | for (k = 0, up = lrdp + lrd_size; k < num_lrd; ++k, up += lrd_size) { |
3165 | lba = get_unaligned_be64(up + 0); |
3166 | num = get_unaligned_be32(up + 8); |
3167 | if (sdebug_verbose) |
3168 | sdev_printk(KERN_INFO, scp->device, |
3169 | "%s: %s: k=%d LBA=0x%llx num=%u sg_off=%u\n" , |
3170 | my_name, __func__, k, lba, num, sg_off); |
3171 | if (num == 0) |
3172 | continue; |
3173 | ret = check_device_access_params(scp, lba, num, true); |
3174 | if (ret) |
3175 | goto err_out_unlock; |
3176 | num_by = num * lb_size; |
3177 | ei_lba = is_16 ? 0 : get_unaligned_be32(up + 12); |
3178 | |
3179 | if ((cum_lb + num) > bt_len) { |
3180 | if (sdebug_verbose) |
3181 | sdev_printk(KERN_INFO, scp->device, |
3182 | "%s: %s: sum of blocks > data provided\n" , |
3183 | my_name, __func__); |
3184 | mk_sense_buffer(scp, ILLEGAL_REQUEST, WRITE_ERROR_ASC, |
3185 | 0); |
3186 | ret = illegal_condition_result; |
3187 | goto err_out_unlock; |
3188 | } |
3189 | |
3190 | /* DIX + T10 DIF */ |
3191 | if (unlikely(sdebug_dix && scsi_prot_sg_count(scp))) { |
3192 | int prot_ret = prot_verify_write(scp, lba, num, |
3193 | ei_lba); |
3194 | |
3195 | if (prot_ret) { |
3196 | mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, |
3197 | prot_ret); |
3198 | ret = illegal_condition_result; |
3199 | goto err_out_unlock; |
3200 | } |
3201 | } |
3202 | |
3203 | ret = do_device_access(scp, sg_off, lba, num, true); |
3204 | if (unlikely(scsi_debug_lbp())) |
3205 | map_region(lba, num); |
3206 | if (unlikely(-1 == ret)) { |
3207 | ret = DID_ERROR << 16; |
3208 | goto err_out_unlock; |
3209 | } else if (unlikely(sdebug_verbose && (ret < num_by))) |
3210 | sdev_printk(KERN_INFO, scp->device, |
3211 | "%s: write: cdb indicated=%u, IO sent=%d bytes\n" , |
3212 | my_name, num_by, ret); |
3213 | |
3214 | if (unlikely(sdebug_any_injecting_opt)) { |
3215 | struct sdebug_queued_cmd *sqcp = |
3216 | (struct sdebug_queued_cmd *)scp->host_scribble; |
3217 | |
3218 | if (sqcp) { |
3219 | if (sqcp->inj_recovered) { |
3220 | mk_sense_buffer(scp, RECOVERED_ERROR, |
3221 | THRESHOLD_EXCEEDED, 0); |
3222 | ret = illegal_condition_result; |
3223 | goto err_out_unlock; |
3224 | } else if (sqcp->inj_dif) { |
3225 | /* Logical block guard check failed */ |
3226 | mk_sense_buffer(scp, ABORTED_COMMAND, |
3227 | 0x10, 1); |
3228 | ret = illegal_condition_result; |
3229 | goto err_out_unlock; |
3230 | } else if (sqcp->inj_dix) { |
3231 | mk_sense_buffer(scp, ILLEGAL_REQUEST, |
3232 | 0x10, 1); |
3233 | ret = illegal_condition_result; |
3234 | goto err_out_unlock; |
3235 | } |
3236 | } |
3237 | } |
3238 | sg_off += num_by; |
3239 | cum_lb += num; |
3240 | } |
3241 | ret = 0; |
3242 | err_out_unlock: |
3243 | write_unlock_irqrestore(&atomic_rw, iflags); |
3244 | err_out: |
3245 | kfree(lrdp); |
3246 | return ret; |
3247 | } |
3248 | |
3249 | static int resp_write_same(struct scsi_cmnd *scp, u64 lba, u32 num, |
3250 | u32 ei_lba, bool unmap, bool ndob) |
3251 | { |
3252 | int ret; |
3253 | unsigned long iflags; |
3254 | unsigned long long i; |
3255 | u32 lb_size = sdebug_sector_size; |
3256 | u64 block, lbaa; |
3257 | u8 *fs1p; |
3258 | |
3259 | ret = check_device_access_params(scp, lba, num, true); |
3260 | if (ret) |
3261 | return ret; |
3262 | |
3263 | write_lock_irqsave(&atomic_rw, iflags); |
3264 | |
3265 | if (unmap && scsi_debug_lbp()) { |
3266 | unmap_region(lba, num); |
3267 | goto out; |
3268 | } |
3269 | lbaa = lba; |
3270 | block = do_div(lbaa, sdebug_store_sectors); |
3271 | /* if ndob then zero 1 logical block, else fetch 1 logical block */ |
3272 | fs1p = fake_storep + (block * lb_size); |
3273 | if (ndob) { |
3274 | memset(fs1p, 0, lb_size); |
3275 | ret = 0; |
3276 | } else |
3277 | ret = fetch_to_dev_buffer(scp, fs1p, lb_size); |
3278 | |
3279 | if (-1 == ret) { |
3280 | write_unlock_irqrestore(&atomic_rw, iflags); |
3281 | return DID_ERROR << 16; |
3282 | } else if (sdebug_verbose && !ndob && (ret < lb_size)) |
3283 | sdev_printk(KERN_INFO, scp->device, |
3284 | "%s: %s: lb size=%u, IO sent=%d bytes\n" , |
3285 | my_name, "write same" , lb_size, ret); |
3286 | |
3287 | /* Copy first sector to remaining blocks */ |
3288 | for (i = 1 ; i < num ; i++) { |
3289 | lbaa = lba + i; |
3290 | block = do_div(lbaa, sdebug_store_sectors); |
3291 | memmove(fake_storep + (block * lb_size), fs1p, lb_size); |
3292 | } |
3293 | if (scsi_debug_lbp()) |
3294 | map_region(lba, num); |
3295 | out: |
3296 | write_unlock_irqrestore(&atomic_rw, iflags); |
3297 | |
3298 | return 0; |
3299 | } |
3300 | |
3301 | static int resp_write_same_10(struct scsi_cmnd *scp, |
3302 | struct sdebug_dev_info *devip) |
3303 | { |
3304 | u8 *cmd = scp->cmnd; |
3305 | u32 lba; |
3306 | u16 num; |
3307 | u32 ei_lba = 0; |
3308 | bool unmap = false; |
3309 | |
3310 | if (cmd[1] & 0x8) { |
3311 | if (sdebug_lbpws10 == 0) { |
3312 | mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 3); |
3313 | return check_condition_result; |
3314 | } else |
3315 | unmap = true; |
3316 | } |
3317 | lba = get_unaligned_be32(cmd + 2); |
3318 | num = get_unaligned_be16(cmd + 7); |
3319 | if (num > sdebug_write_same_length) { |
3320 | mk_sense_invalid_fld(scp, SDEB_IN_CDB, 7, -1); |
3321 | return check_condition_result; |
3322 | } |
3323 | return resp_write_same(scp, lba, num, ei_lba, unmap, false); |
3324 | } |
3325 | |
3326 | static int resp_write_same_16(struct scsi_cmnd *scp, |
3327 | struct sdebug_dev_info *devip) |
3328 | { |
3329 | u8 *cmd = scp->cmnd; |
3330 | u64 lba; |
3331 | u32 num; |
3332 | u32 ei_lba = 0; |
3333 | bool unmap = false; |
3334 | bool ndob = false; |
3335 | |
3336 | if (cmd[1] & 0x8) { /* UNMAP */ |
3337 | if (sdebug_lbpws == 0) { |
3338 | mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 3); |
3339 | return check_condition_result; |
3340 | } else |
3341 | unmap = true; |
3342 | } |
3343 | if (cmd[1] & 0x1) /* NDOB (no data-out buffer, assumes zeroes) */ |
3344 | ndob = true; |
3345 | lba = get_unaligned_be64(cmd + 2); |
3346 | num = get_unaligned_be32(cmd + 10); |
3347 | if (num > sdebug_write_same_length) { |
3348 | mk_sense_invalid_fld(scp, SDEB_IN_CDB, 10, -1); |
3349 | return check_condition_result; |
3350 | } |
3351 | return resp_write_same(scp, lba, num, ei_lba, unmap, ndob); |
3352 | } |
3353 | |
3354 | /* Note the mode field is in the same position as the (lower) service action |
3355 | * field. For the Report supported operation codes command, SPC-4 suggests |
3356 | * each mode of this command should be reported separately; for future. */ |
3357 | static int resp_write_buffer(struct scsi_cmnd *scp, |
3358 | struct sdebug_dev_info *devip) |
3359 | { |
3360 | u8 *cmd = scp->cmnd; |
3361 | struct scsi_device *sdp = scp->device; |
3362 | struct sdebug_dev_info *dp; |
3363 | u8 mode; |
3364 | |
3365 | mode = cmd[1] & 0x1f; |
3366 | switch (mode) { |
3367 | case 0x4: /* download microcode (MC) and activate (ACT) */ |
3368 | /* set UAs on this device only */ |
3369 | set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm); |
3370 | set_bit(SDEBUG_UA_MICROCODE_CHANGED, devip->uas_bm); |
3371 | break; |
3372 | case 0x5: /* download MC, save and ACT */ |
3373 | set_bit(SDEBUG_UA_MICROCODE_CHANGED_WO_RESET, devip->uas_bm); |
3374 | break; |
3375 | case 0x6: /* download MC with offsets and ACT */ |
3376 | /* set UAs on most devices (LUs) in this target */ |
3377 | list_for_each_entry(dp, |
3378 | &devip->sdbg_host->dev_info_list, |
3379 | dev_list) |
3380 | if (dp->target == sdp->id) { |
3381 | set_bit(SDEBUG_UA_BUS_RESET, dp->uas_bm); |
3382 | if (devip != dp) |
3383 | set_bit(SDEBUG_UA_MICROCODE_CHANGED, |
3384 | dp->uas_bm); |
3385 | } |
3386 | break; |
3387 | case 0x7: /* download MC with offsets, save, and ACT */ |
3388 | /* set UA on all devices (LUs) in this target */ |
3389 | list_for_each_entry(dp, |
3390 | &devip->sdbg_host->dev_info_list, |
3391 | dev_list) |
3392 | if (dp->target == sdp->id) |
3393 | set_bit(SDEBUG_UA_MICROCODE_CHANGED_WO_RESET, |
3394 | dp->uas_bm); |
3395 | break; |
3396 | default: |
3397 | /* do nothing for this command for other mode values */ |
3398 | break; |
3399 | } |
3400 | return 0; |
3401 | } |
3402 | |
3403 | static int resp_comp_write(struct scsi_cmnd *scp, |
3404 | struct sdebug_dev_info *devip) |
3405 | { |
3406 | u8 *cmd = scp->cmnd; |
3407 | u8 *arr; |
3408 | u8 *fake_storep_hold; |
3409 | u64 lba; |
3410 | u32 dnum; |
3411 | u32 lb_size = sdebug_sector_size; |
3412 | u8 num; |
3413 | unsigned long iflags; |
3414 | int ret; |
3415 | int retval = 0; |
3416 | |
3417 | lba = get_unaligned_be64(cmd + 2); |
3418 | num = cmd[13]; /* 1 to a maximum of 255 logical blocks */ |
3419 | if (0 == num) |
3420 | return 0; /* degenerate case, not an error */ |
3421 | if (sdebug_dif == T10_PI_TYPE2_PROTECTION && |
3422 | (cmd[1] & 0xe0)) { |
3423 | mk_sense_invalid_opcode(scp); |
3424 | return check_condition_result; |
3425 | } |
3426 | if ((sdebug_dif == T10_PI_TYPE1_PROTECTION || |
3427 | sdebug_dif == T10_PI_TYPE3_PROTECTION) && |
3428 | (cmd[1] & 0xe0) == 0) |
3429 | sdev_printk(KERN_ERR, scp->device, "Unprotected WR " |
3430 | "to DIF device\n" ); |
3431 | ret = check_device_access_params(scp, lba, num, false); |
3432 | if (ret) |
3433 | return ret; |
3434 | dnum = 2 * num; |
3435 | arr = kcalloc(lb_size, dnum, GFP_ATOMIC); |
3436 | if (NULL == arr) { |
3437 | mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC, |
3438 | INSUFF_RES_ASCQ); |
3439 | return check_condition_result; |
3440 | } |
3441 | |
3442 | write_lock_irqsave(&atomic_rw, iflags); |
3443 | |
3444 | /* trick do_device_access() to fetch both compare and write buffers |
3445 | * from data-in into arr. Safe (atomic) since write_lock held. */ |
3446 | fake_storep_hold = fake_storep; |
3447 | fake_storep = arr; |
3448 | ret = do_device_access(scp, 0, 0, dnum, true); |
3449 | fake_storep = fake_storep_hold; |
3450 | if (ret == -1) { |
3451 | retval = DID_ERROR << 16; |
3452 | goto cleanup; |
3453 | } else if (sdebug_verbose && (ret < (dnum * lb_size))) |
3454 | sdev_printk(KERN_INFO, scp->device, "%s: compare_write: cdb " |
3455 | "indicated=%u, IO sent=%d bytes\n" , my_name, |
3456 | dnum * lb_size, ret); |
3457 | if (!comp_write_worker(lba, num, arr)) { |
3458 | mk_sense_buffer(scp, MISCOMPARE, MISCOMPARE_VERIFY_ASC, 0); |
3459 | retval = check_condition_result; |
3460 | goto cleanup; |
3461 | } |
3462 | if (scsi_debug_lbp()) |
3463 | map_region(lba, num); |
3464 | cleanup: |
3465 | write_unlock_irqrestore(&atomic_rw, iflags); |
3466 | kfree(arr); |
3467 | return retval; |
3468 | } |
3469 | |
3470 | struct unmap_block_desc { |
3471 | __be64 lba; |
3472 | __be32 blocks; |
3473 | __be32 __reserved; |
3474 | }; |
3475 | |
3476 | static int resp_unmap(struct scsi_cmnd *scp, struct sdebug_dev_info *devip) |
3477 | { |
3478 | unsigned char *buf; |
3479 | struct unmap_block_desc *desc; |
3480 | unsigned int i, payload_len, descriptors; |
3481 | int ret; |
3482 | unsigned long iflags; |
3483 | |
3484 | |
3485 | if (!scsi_debug_lbp()) |
3486 | return 0; /* fib and say its done */ |
3487 | payload_len = get_unaligned_be16(scp->cmnd + 7); |
3488 | BUG_ON(scsi_bufflen(scp) != payload_len); |
3489 | |
3490 | descriptors = (payload_len - 8) / 16; |
3491 | if (descriptors > sdebug_unmap_max_desc) { |
3492 | mk_sense_invalid_fld(scp, SDEB_IN_CDB, 7, -1); |
3493 | return check_condition_result; |
3494 | } |
3495 | |
3496 | buf = kzalloc(scsi_bufflen(scp), GFP_ATOMIC); |
3497 | if (!buf) { |
3498 | mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC, |
3499 | INSUFF_RES_ASCQ); |
3500 | return check_condition_result; |
3501 | } |
3502 | |
3503 | scsi_sg_copy_to_buffer(scp, buf, scsi_bufflen(scp)); |
3504 | |
3505 | BUG_ON(get_unaligned_be16(&buf[0]) != payload_len - 2); |
3506 | BUG_ON(get_unaligned_be16(&buf[2]) != descriptors * 16); |
3507 | |
3508 | desc = (void *)&buf[8]; |
3509 | |
3510 | write_lock_irqsave(&atomic_rw, iflags); |
3511 | |
3512 | for (i = 0 ; i < descriptors ; i++) { |
3513 | unsigned long long lba = get_unaligned_be64(&desc[i].lba); |
3514 | unsigned int num = get_unaligned_be32(&desc[i].blocks); |
3515 | |
3516 | ret = check_device_access_params(scp, lba, num, true); |
3517 | if (ret) |
3518 | goto out; |
3519 | |
3520 | unmap_region(lba, num); |
3521 | } |
3522 | |
3523 | ret = 0; |
3524 | |
3525 | out: |
3526 | write_unlock_irqrestore(&atomic_rw, iflags); |
3527 | kfree(buf); |
3528 | |
3529 | return ret; |
3530 | } |
3531 | |
3532 | #define SDEBUG_GET_LBA_STATUS_LEN 32 |
3533 | |
3534 | static int resp_get_lba_status(struct scsi_cmnd *scp, |
3535 | struct sdebug_dev_info *devip) |
3536 | { |
3537 | u8 *cmd = scp->cmnd; |
3538 | u64 lba; |
3539 | u32 alloc_len, mapped, num; |
3540 | u8 arr[SDEBUG_GET_LBA_STATUS_LEN]; |
3541 | int ret; |
3542 | |
3543 | lba = get_unaligned_be64(cmd + 2); |
3544 | alloc_len = get_unaligned_be32(cmd + 10); |
3545 | |
3546 | if (alloc_len < 24) |
3547 | return 0; |
3548 | |
3549 | ret = check_device_access_params(scp, lba, 1, false); |
3550 | if (ret) |
3551 | return ret; |
3552 | |
3553 | if (scsi_debug_lbp()) |
3554 | mapped = map_state(lba, &num); |
3555 | else { |
3556 | mapped = 1; |
3557 | /* following just in case virtual_gb changed */ |
3558 | sdebug_capacity = get_sdebug_capacity(); |
3559 | if (sdebug_capacity - lba <= 0xffffffff) |
3560 | num = sdebug_capacity - lba; |
3561 | else |
3562 | num = 0xffffffff; |
3563 | } |
3564 | |
3565 | memset(arr, 0, SDEBUG_GET_LBA_STATUS_LEN); |
3566 | put_unaligned_be32(20, arr); /* Parameter Data Length */ |
3567 | put_unaligned_be64(lba, arr + 8); /* LBA */ |
3568 | put_unaligned_be32(num, arr + 16); /* Number of blocks */ |
3569 | arr[20] = !mapped; /* prov_stat=0: mapped; 1: dealloc */ |
3570 | |
3571 | return fill_from_dev_buffer(scp, arr, SDEBUG_GET_LBA_STATUS_LEN); |
3572 | } |
3573 | |
3574 | static int resp_sync_cache(struct scsi_cmnd *scp, |
3575 | struct sdebug_dev_info *devip) |
3576 | { |
3577 | int res = 0; |
3578 | u64 lba; |
3579 | u32 num_blocks; |
3580 | u8 *cmd = scp->cmnd; |
3581 | |
3582 | if (cmd[0] == SYNCHRONIZE_CACHE) { /* 10 byte cdb */ |
3583 | lba = get_unaligned_be32(cmd + 2); |
3584 | num_blocks = get_unaligned_be16(cmd + 7); |
3585 | } else { /* SYNCHRONIZE_CACHE(16) */ |
3586 | lba = get_unaligned_be64(cmd + 2); |
3587 | num_blocks = get_unaligned_be32(cmd + 10); |
3588 | } |
3589 | if (lba + num_blocks > sdebug_capacity) { |
3590 | mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0); |
3591 | return check_condition_result; |
3592 | } |
3593 | if (!write_since_sync || cmd[1] & 0x2) |
3594 | res = SDEG_RES_IMMED_MASK; |
3595 | else /* delay if write_since_sync and IMMED clear */ |
3596 | write_since_sync = false; |
3597 | return res; |
3598 | } |
3599 | |
3600 | #define RL_BUCKET_ELEMS 8 |
3601 | |
3602 | /* Even though each pseudo target has a REPORT LUNS "well known logical unit" |
3603 | * (W-LUN), the normal Linux scanning logic does not associate it with a |
3604 | * device (e.g. /dev/sg7). The following magic will make that association: |
3605 | * "cd /sys/class/scsi_host/host<n> ; echo '- - 49409' > scan" |
3606 | * where <n> is a host number. If there are multiple targets in a host then |
3607 | * the above will associate a W-LUN to each target. To only get a W-LUN |
3608 | * for target 2, then use "echo '- 2 49409' > scan" . |
3609 | */ |
3610 | static int resp_report_luns(struct scsi_cmnd *scp, |
3611 | struct sdebug_dev_info *devip) |
3612 | { |
3613 | unsigned char *cmd = scp->cmnd; |
3614 | unsigned int alloc_len; |
3615 | unsigned char select_report; |
3616 | u64 lun; |
3617 | struct scsi_lun *lun_p; |
3618 | u8 arr[RL_BUCKET_ELEMS * sizeof(struct scsi_lun)]; |
3619 | unsigned int lun_cnt; /* normal LUN count (max: 256) */ |
3620 | unsigned int wlun_cnt; /* report luns W-LUN count */ |
3621 | unsigned int tlun_cnt; /* total LUN count */ |
3622 | unsigned int rlen; /* response length (in bytes) */ |
3623 | int k, j, n, res; |
3624 | unsigned int off_rsp = 0; |
3625 | const int sz_lun = sizeof(struct scsi_lun); |
3626 | |
3627 | clear_luns_changed_on_target(devip); |
3628 | |
3629 | select_report = cmd[2]; |
3630 | alloc_len = get_unaligned_be32(cmd + 6); |
3631 | |
3632 | if (alloc_len < 4) { |
3633 | pr_err("alloc len too small %d\n" , alloc_len); |
3634 | mk_sense_invalid_fld(scp, SDEB_IN_CDB, 6, -1); |
3635 | return check_condition_result; |
3636 | } |
3637 | |
3638 | switch (select_report) { |
3639 | case 0: /* all LUNs apart from W-LUNs */ |
3640 | lun_cnt = sdebug_max_luns; |
3641 | wlun_cnt = 0; |
3642 | break; |
3643 | case 1: /* only W-LUNs */ |
3644 | lun_cnt = 0; |
3645 | wlun_cnt = 1; |
3646 | break; |
3647 | case 2: /* all LUNs */ |
3648 | lun_cnt = sdebug_max_luns; |
3649 | wlun_cnt = 1; |
3650 | break; |
3651 | case 0x10: /* only administrative LUs */ |
3652 | case 0x11: /* see SPC-5 */ |
3653 | case 0x12: /* only subsiduary LUs owned by referenced LU */ |
3654 | default: |
3655 | pr_debug("select report invalid %d\n" , select_report); |
3656 | mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, -1); |
3657 | return check_condition_result; |
3658 | } |
3659 | |
3660 | if (sdebug_no_lun_0 && (lun_cnt > 0)) |
3661 | --lun_cnt; |
3662 | |
3663 | tlun_cnt = lun_cnt + wlun_cnt; |
3664 | rlen = tlun_cnt * sz_lun; /* excluding 8 byte header */ |
3665 | scsi_set_resid(scp, scsi_bufflen(scp)); |
3666 | pr_debug("select_report %d luns = %d wluns = %d no_lun0 %d\n" , |
3667 | select_report, lun_cnt, wlun_cnt, sdebug_no_lun_0); |
3668 | |
3669 | /* loops rely on sizeof response header same as sizeof lun (both 8) */ |
3670 | lun = sdebug_no_lun_0 ? 1 : 0; |
3671 | for (k = 0, j = 0, res = 0; true; ++k, j = 0) { |
3672 | memset(arr, 0, sizeof(arr)); |
3673 | lun_p = (struct scsi_lun *)&arr[0]; |
3674 | if (k == 0) { |
3675 | put_unaligned_be32(rlen, &arr[0]); |
3676 | ++lun_p; |
3677 | j = 1; |
3678 | } |
3679 | for ( ; j < RL_BUCKET_ELEMS; ++j, ++lun_p) { |
3680 | if ((k * RL_BUCKET_ELEMS) + j > lun_cnt) |
3681 | break; |
3682 | int_to_scsilun(lun++, lun_p); |
3683 | } |
3684 | if (j < RL_BUCKET_ELEMS) |
3685 | break; |
3686 | n = j * sz_lun; |
3687 | res = p_fill_from_dev_buffer(scp, arr, n, off_rsp); |
3688 | if (res) |
3689 | return res; |
3690 | off_rsp += n; |
3691 | } |
3692 | if (wlun_cnt) { |
3693 | int_to_scsilun(SCSI_W_LUN_REPORT_LUNS, lun_p); |
3694 | ++j; |
3695 | } |
3696 | if (j > 0) |
3697 | res = p_fill_from_dev_buffer(scp, arr, j * sz_lun, off_rsp); |
3698 | return |
---|