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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 * This version is more generic, simulating a variable number of disk
10 * (or disk like devices) sharing a common amount of RAM. To be more
11 * realistic, the simulated devices have the transport attributes of
12 * SAS disks.
13 *
14 *
15 * For documentation see http://sg.danny.cz/sg/sdebug26.html
16 *
17 * D. Gilbert (dpg) work for Magneto-Optical device test [20010421]
18 * dpg: work for devfs large number of disks [20010809]
19 * forked for lk 2.5 series [20011216, 20020101]
20 * use vmalloc() more inquiry+mode_sense [20020302]
21 * add timers for delayed responses [20020721]
22 * Patrick Mansfield <patmans@us.ibm.com> max_luns+scsi_level [20021031]
23 * Mike Anderson <andmike@us.ibm.com> sysfs work [20021118]
24 * dpg: change style of boot options to "scsi_debug.num_tgts=2" and
25 * module options to "modprobe scsi_debug num_tgts=2" [20021221]
26 */
27
28 #include <linux/module.h>
29
30 #include <linux/kernel.h>
31 #include <linux/errno.h>
32 #include <linux/timer.h>
33 #include <linux/slab.h>
34 #include <linux/types.h>
35 #include <linux/string.h>
36 #include <linux/genhd.h>
37 #include <linux/fs.h>
38 #include <linux/init.h>
39 #include <linux/proc_fs.h>
40 #include <linux/vmalloc.h>
41 #include <linux/moduleparam.h>
42 #include <linux/scatterlist.h>
43 #include <linux/blkdev.h>
44 #include <linux/crc-t10dif.h>
45 #include <linux/spinlock.h>
46 #include <linux/interrupt.h>
47 #include <linux/atomic.h>
48 #include <linux/hrtimer.h>
49
50 #include <net/checksum.h>
51
52 #include <asm/unaligned.h>
53
54 #include <scsi/scsi.h>
55 #include <scsi/scsi_cmnd.h>
56 #include <scsi/scsi_device.h>
57 #include <scsi/scsi_host.h>
58 #include <scsi/scsicam.h>
59 #include <scsi/scsi_eh.h>
60 #include <scsi/scsi_tcq.h>
61 #include <scsi/scsi_dbg.h>
62
63 #include "sd.h"
64 #include "scsi_logging.h"
65
66 #define SCSI_DEBUG_VERSION "1.85"
67 static const char *scsi_debug_version_date = "20141022";
68
69 #define MY_NAME "scsi_debug"
70
71 /* Additional Sense Code (ASC) */
72 #define NO_ADDITIONAL_SENSE 0x0
73 #define LOGICAL_UNIT_NOT_READY 0x4
74 #define LOGICAL_UNIT_COMMUNICATION_FAILURE 0x8
75 #define UNRECOVERED_READ_ERR 0x11
76 #define PARAMETER_LIST_LENGTH_ERR 0x1a
77 #define INVALID_OPCODE 0x20
78 #define LBA_OUT_OF_RANGE 0x21
79 #define INVALID_FIELD_IN_CDB 0x24
80 #define INVALID_FIELD_IN_PARAM_LIST 0x26
81 #define UA_RESET_ASC 0x29
82 #define UA_CHANGED_ASC 0x2a
83 #define INSUFF_RES_ASC 0x55
84 #define INSUFF_RES_ASCQ 0x3
85 #define POWER_ON_RESET_ASCQ 0x0
86 #define BUS_RESET_ASCQ 0x2 /* scsi bus reset occurred */
87 #define MODE_CHANGED_ASCQ 0x1 /* mode parameters changed */
88 #define CAPACITY_CHANGED_ASCQ 0x9
89 #define SAVING_PARAMS_UNSUP 0x39
90 #define TRANSPORT_PROBLEM 0x4b
91 #define THRESHOLD_EXCEEDED 0x5d
92 #define LOW_POWER_COND_ON 0x5e
93 #define MISCOMPARE_VERIFY_ASC 0x1d
94
95 /* Additional Sense Code Qualifier (ASCQ) */
96 #define ACK_NAK_TO 0x3
97
98
99 /* Default values for driver parameters */
100 #define DEF_NUM_HOST 1
101 #define DEF_NUM_TGTS 1
102 #define DEF_MAX_LUNS 1
103 /* With these defaults, this driver will make 1 host with 1 target
104 * (id 0) containing 1 logical unit (lun 0). That is 1 device.
105 */
106 #define DEF_ATO 1
107 #define DEF_DELAY 1 /* if > 0 unit is a jiffy */
108 #define DEF_DEV_SIZE_MB 8
109 #define DEF_DIF 0
110 #define DEF_DIX 0
111 #define DEF_D_SENSE 0
112 #define DEF_EVERY_NTH 0
113 #define DEF_FAKE_RW 0
114 #define DEF_GUARD 0
115 #define DEF_HOST_LOCK 0
116 #define DEF_LBPU 0
117 #define DEF_LBPWS 0
118 #define DEF_LBPWS10 0
119 #define DEF_LBPRZ 1
120 #define DEF_LOWEST_ALIGNED 0
121 #define DEF_NDELAY 0 /* if > 0 unit is a nanosecond */
122 #define DEF_NO_LUN_0 0
123 #define DEF_NUM_PARTS 0
124 #define DEF_OPTS 0
125 #define DEF_OPT_BLKS 64
126 #define DEF_PHYSBLK_EXP 0
127 #define DEF_PTYPE 0
128 #define DEF_REMOVABLE false
129 #define DEF_SCSI_LEVEL 6 /* INQUIRY, byte2 [6->SPC-4] */
130 #define DEF_SECTOR_SIZE 512
131 #define DEF_UNMAP_ALIGNMENT 0
132 #define DEF_UNMAP_GRANULARITY 1
133 #define DEF_UNMAP_MAX_BLOCKS 0xFFFFFFFF
134 #define DEF_UNMAP_MAX_DESC 256
135 #define DEF_VIRTUAL_GB 0
136 #define DEF_VPD_USE_HOSTNO 1
137 #define DEF_WRITESAME_LENGTH 0xFFFF
138 #define DEF_STRICT 0
139 #define DELAY_OVERRIDDEN -9999
140
141 /* bit mask values for scsi_debug_opts */
142 #define SCSI_DEBUG_OPT_NOISE 1
143 #define SCSI_DEBUG_OPT_MEDIUM_ERR 2
144 #define SCSI_DEBUG_OPT_TIMEOUT 4
145 #define SCSI_DEBUG_OPT_RECOVERED_ERR 8
146 #define SCSI_DEBUG_OPT_TRANSPORT_ERR 16
147 #define SCSI_DEBUG_OPT_DIF_ERR 32
148 #define SCSI_DEBUG_OPT_DIX_ERR 64
149 #define SCSI_DEBUG_OPT_MAC_TIMEOUT 128
150 #define SCSI_DEBUG_OPT_SHORT_TRANSFER 0x100
151 #define SCSI_DEBUG_OPT_Q_NOISE 0x200
152 #define SCSI_DEBUG_OPT_ALL_TSF 0x400
153 #define SCSI_DEBUG_OPT_RARE_TSF 0x800
154 #define SCSI_DEBUG_OPT_N_WCE 0x1000
155 #define SCSI_DEBUG_OPT_RESET_NOISE 0x2000
156 #define SCSI_DEBUG_OPT_NO_CDB_NOISE 0x4000
157 #define SCSI_DEBUG_OPT_ALL_NOISE (0x1 | 0x200 | 0x2000)
158 /* When "every_nth" > 0 then modulo "every_nth" commands:
159 * - a no response is simulated if SCSI_DEBUG_OPT_TIMEOUT is set
160 * - a RECOVERED_ERROR is simulated on successful read and write
161 * commands if SCSI_DEBUG_OPT_RECOVERED_ERR is set.
162 * - a TRANSPORT_ERROR is simulated on successful read and write
163 * commands if SCSI_DEBUG_OPT_TRANSPORT_ERR is set.
164 *
165 * When "every_nth" < 0 then after "- every_nth" commands:
166 * - a no response is simulated if SCSI_DEBUG_OPT_TIMEOUT is set
167 * - a RECOVERED_ERROR is simulated on successful read and write
168 * commands if SCSI_DEBUG_OPT_RECOVERED_ERR is set.
169 * - a TRANSPORT_ERROR is simulated on successful read and write
170 * commands if SCSI_DEBUG_OPT_TRANSPORT_ERR is set.
171 * This will continue until some other action occurs (e.g. the user
172 * writing a new value (other than -1 or 1) to every_nth via sysfs).
173 */
174
175 /* As indicated in SAM-5 and SPC-4 Unit Attentions (UAs)are returned in
176 * priority order. In the subset implemented here lower numbers have higher
177 * priority. The UA numbers should be a sequence starting from 0 with
178 * SDEBUG_NUM_UAS being 1 higher than the highest numbered UA. */
179 #define SDEBUG_UA_POR 0 /* Power on, reset, or bus device reset */
180 #define SDEBUG_UA_BUS_RESET 1
181 #define SDEBUG_UA_MODE_CHANGED 2
182 #define SDEBUG_UA_CAPACITY_CHANGED 3
183 #define SDEBUG_NUM_UAS 4
184
185 /* for check_readiness() */
186 #define UAS_ONLY 1 /* check for UAs only */
187 #define UAS_TUR 0 /* if no UAs then check if media access possible */
188
189 /* when 1==SCSI_DEBUG_OPT_MEDIUM_ERR, a medium error is simulated at this
190 * sector on read commands: */
191 #define OPT_MEDIUM_ERR_ADDR 0x1234 /* that's sector 4660 in decimal */
192 #define OPT_MEDIUM_ERR_NUM 10 /* number of consecutive medium errs */
193
194 /* If REPORT LUNS has luns >= 256 it can choose "flat space" (value 1)
195 * or "peripheral device" addressing (value 0) */
196 #define SAM2_LUN_ADDRESS_METHOD 0
197 #define SAM2_WLUN_REPORT_LUNS 0xc101
198
199 /* SCSI_DEBUG_CANQUEUE is the maximum number of commands that can be queued
200 * (for response) at one time. Can be reduced by max_queue option. Command
201 * responses are not queued when delay=0 and ndelay=0. The per-device
202 * DEF_CMD_PER_LUN can be changed via sysfs:
203 * /sys/class/scsi_device/<h:c:t:l>/device/queue_depth but cannot exceed
204 * SCSI_DEBUG_CANQUEUE. */
205 #define SCSI_DEBUG_CANQUEUE_WORDS 9 /* a WORD is bits in a long */
206 #define SCSI_DEBUG_CANQUEUE (SCSI_DEBUG_CANQUEUE_WORDS * BITS_PER_LONG)
207 #define DEF_CMD_PER_LUN 255
208
209 #if DEF_CMD_PER_LUN > SCSI_DEBUG_CANQUEUE
210 #warning "Expect DEF_CMD_PER_LUN <= SCSI_DEBUG_CANQUEUE"
211 #endif
212
213 /* SCSI opcodes (first byte of cdb) mapped onto these indexes */
214 enum sdeb_opcode_index {
215 SDEB_I_INVALID_OPCODE = 0,
216 SDEB_I_INQUIRY = 1,
217 SDEB_I_REPORT_LUNS = 2,
218 SDEB_I_REQUEST_SENSE = 3,
219 SDEB_I_TEST_UNIT_READY = 4,
220 SDEB_I_MODE_SENSE = 5, /* 6, 10 */
221 SDEB_I_MODE_SELECT = 6, /* 6, 10 */
222 SDEB_I_LOG_SENSE = 7,
223 SDEB_I_READ_CAPACITY = 8, /* 10; 16 is in SA_IN(16) */
224 SDEB_I_READ = 9, /* 6, 10, 12, 16 */
225 SDEB_I_WRITE = 10, /* 6, 10, 12, 16 */
226 SDEB_I_START_STOP = 11,
227 SDEB_I_SERV_ACT_IN = 12, /* 12, 16 */
228 SDEB_I_SERV_ACT_OUT = 13, /* 12, 16 */
229 SDEB_I_MAINT_IN = 14,
230 SDEB_I_MAINT_OUT = 15,
231 SDEB_I_VERIFY = 16, /* 10 only */
232 SDEB_I_VARIABLE_LEN = 17,
233 SDEB_I_RESERVE = 18, /* 6, 10 */
234 SDEB_I_RELEASE = 19, /* 6, 10 */
235 SDEB_I_ALLOW_REMOVAL = 20, /* PREVENT ALLOW MEDIUM REMOVAL */
236 SDEB_I_REZERO_UNIT = 21, /* REWIND in SSC */
237 SDEB_I_ATA_PT = 22, /* 12, 16 */
238 SDEB_I_SEND_DIAG = 23,
239 SDEB_I_UNMAP = 24,
240 SDEB_I_XDWRITEREAD = 25, /* 10 only */
241 SDEB_I_WRITE_BUFFER = 26,
242 SDEB_I_WRITE_SAME = 27, /* 10, 16 */
243 SDEB_I_SYNC_CACHE = 28, /* 10 only */
244 SDEB_I_COMP_WRITE = 29,
245 SDEB_I_LAST_ELEMENT = 30, /* keep this last */
246 };
247
248 static const unsigned char opcode_ind_arr[256] = {
249 /* 0x0; 0x0->0x1f: 6 byte cdbs */
250 SDEB_I_TEST_UNIT_READY, SDEB_I_REZERO_UNIT, 0, SDEB_I_REQUEST_SENSE,
251 0, 0, 0, 0,
252 SDEB_I_READ, 0, SDEB_I_WRITE, 0, 0, 0, 0, 0,
253 0, 0, SDEB_I_INQUIRY, 0, 0, SDEB_I_MODE_SELECT, SDEB_I_RESERVE,
254 SDEB_I_RELEASE,
255 0, 0, SDEB_I_MODE_SENSE, SDEB_I_START_STOP, 0, SDEB_I_SEND_DIAG,
256 SDEB_I_ALLOW_REMOVAL, 0,
257 /* 0x20; 0x20->0x3f: 10 byte cdbs */
258 0, 0, 0, 0, 0, SDEB_I_READ_CAPACITY, 0, 0,
259 SDEB_I_READ, 0, SDEB_I_WRITE, 0, 0, 0, 0, SDEB_I_VERIFY,
260 0, 0, 0, 0, 0, SDEB_I_SYNC_CACHE, 0, 0,
261 0, 0, 0, SDEB_I_WRITE_BUFFER, 0, 0, 0, 0,
262 /* 0x40; 0x40->0x5f: 10 byte cdbs */
263 0, SDEB_I_WRITE_SAME, SDEB_I_UNMAP, 0, 0, 0, 0, 0,
264 0, 0, 0, 0, 0, SDEB_I_LOG_SENSE, 0, 0,
265 0, 0, 0, SDEB_I_XDWRITEREAD, 0, SDEB_I_MODE_SELECT, SDEB_I_RESERVE,
266 SDEB_I_RELEASE,
267 0, 0, SDEB_I_MODE_SENSE, 0, 0, 0, 0, 0,
268 /* 0x60; 0x60->0x7d are reserved */
269 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
270 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
271 0, SDEB_I_VARIABLE_LEN,
272 /* 0x80; 0x80->0x9f: 16 byte cdbs */
273 0, 0, 0, 0, 0, SDEB_I_ATA_PT, 0, 0,
274 SDEB_I_READ, SDEB_I_COMP_WRITE, SDEB_I_WRITE, 0, 0, 0, 0, 0,
275 0, 0, 0, SDEB_I_WRITE_SAME, 0, 0, 0, 0,
276 0, 0, 0, 0, 0, 0, SDEB_I_SERV_ACT_IN, SDEB_I_SERV_ACT_OUT,
277 /* 0xa0; 0xa0->0xbf: 12 byte cdbs */
278 SDEB_I_REPORT_LUNS, SDEB_I_ATA_PT, 0, SDEB_I_MAINT_IN,
279 SDEB_I_MAINT_OUT, 0, 0, 0,
280 SDEB_I_READ, SDEB_I_SERV_ACT_OUT, SDEB_I_WRITE, SDEB_I_SERV_ACT_IN,
281 0, 0, 0, 0,
282 0, 0, 0, 0, 0, 0, 0, 0,
283 0, 0, 0, 0, 0, 0, 0, 0,
284 /* 0xc0; 0xc0->0xff: vendor specific */
285 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
286 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
287 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
288 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
289 };
290
291 #define F_D_IN 1
292 #define F_D_OUT 2
293 #define F_D_OUT_MAYBE 4 /* WRITE SAME, NDOB bit */
294 #define F_D_UNKN 8
295 #define F_RL_WLUN_OK 0x10
296 #define F_SKIP_UA 0x20
297 #define F_DELAY_OVERR 0x40
298 #define F_SA_LOW 0x80 /* cdb byte 1, bits 4 to 0 */
299 #define F_SA_HIGH 0x100 /* as used by variable length cdbs */
300 #define F_INV_OP 0x200
301 #define F_FAKE_RW 0x400
302 #define F_M_ACCESS 0x800 /* media access */
303
304 #define FF_RESPOND (F_RL_WLUN_OK | F_SKIP_UA | F_DELAY_OVERR)
305 #define FF_DIRECT_IO (F_M_ACCESS | F_FAKE_RW)
306 #define FF_SA (F_SA_HIGH | F_SA_LOW)
307
308 struct sdebug_dev_info;
309 static int resp_inquiry(struct scsi_cmnd *, struct sdebug_dev_info *);
310 static int resp_report_luns(struct scsi_cmnd *, struct sdebug_dev_info *);
311 static int resp_requests(struct scsi_cmnd *, struct sdebug_dev_info *);
312 static int resp_mode_sense(struct scsi_cmnd *, struct sdebug_dev_info *);
313 static int resp_mode_select(struct scsi_cmnd *, struct sdebug_dev_info *);
314 static int resp_log_sense(struct scsi_cmnd *, struct sdebug_dev_info *);
315 static int resp_readcap(struct scsi_cmnd *, struct sdebug_dev_info *);
316 static int resp_read_dt0(struct scsi_cmnd *, struct sdebug_dev_info *);
317 static int resp_write_dt0(struct scsi_cmnd *, struct sdebug_dev_info *);
318 static int resp_start_stop(struct scsi_cmnd *, struct sdebug_dev_info *);
319 static int resp_readcap16(struct scsi_cmnd *, struct sdebug_dev_info *);
320 static int resp_get_lba_status(struct scsi_cmnd *, struct sdebug_dev_info *);
321 static int resp_report_tgtpgs(struct scsi_cmnd *, struct sdebug_dev_info *);
322 static int resp_unmap(struct scsi_cmnd *, struct sdebug_dev_info *);
323 static int resp_rsup_opcodes(struct scsi_cmnd *, struct sdebug_dev_info *);
324 static int resp_rsup_tmfs(struct scsi_cmnd *, struct sdebug_dev_info *);
325 static int resp_write_same_10(struct scsi_cmnd *, struct sdebug_dev_info *);
326 static int resp_write_same_16(struct scsi_cmnd *, struct sdebug_dev_info *);
327 static int resp_xdwriteread_10(struct scsi_cmnd *, struct sdebug_dev_info *);
328 static int resp_comp_write(struct scsi_cmnd *, struct sdebug_dev_info *);
329
330 struct opcode_info_t {
331 u8 num_attached; /* 0 if this is it (i.e. a leaf); use 0xff
332 * for terminating element */
333 u8 opcode; /* if num_attached > 0, preferred */
334 u16 sa; /* service action */
335 u32 flags; /* OR-ed set of SDEB_F_* */
336 int (*pfp)(struct scsi_cmnd *, struct sdebug_dev_info *);
337 const struct opcode_info_t *arrp; /* num_attached elements or NULL */
338 u8 len_mask[16]; /* len=len_mask[0], then mask for cdb[1]... */
339 /* ignore cdb bytes after position 15 */
340 };
341
342 static const struct opcode_info_t msense_iarr[1] = {
343 {0, 0x1a, 0, F_D_IN, NULL, NULL,
344 {6, 0xe8, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
345 };
346
347 static const struct opcode_info_t mselect_iarr[1] = {
348 {0, 0x15, 0, F_D_OUT, NULL, NULL,
349 {6, 0xf1, 0, 0, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
350 };
351
352 static const struct opcode_info_t read_iarr[3] = {
353 {0, 0x28, 0, F_D_IN | FF_DIRECT_IO, resp_read_dt0, NULL,/* READ(10) */
354 {10, 0xff, 0xff, 0xff, 0xff, 0xff, 0x1f, 0xff, 0xff, 0xc7, 0, 0,
355 0, 0, 0, 0} },
356 {0, 0x8, 0, F_D_IN | FF_DIRECT_IO, resp_read_dt0, NULL, /* READ(6) */
357 {6, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
358 {0, 0xa8, 0, F_D_IN | FF_DIRECT_IO, resp_read_dt0, NULL,/* READ(12) */
359 {12, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x9f,
360 0xc7, 0, 0, 0, 0} },
361 };
362
363 static const struct opcode_info_t write_iarr[3] = {
364 {0, 0x2a, 0, F_D_OUT | FF_DIRECT_IO, resp_write_dt0, NULL, /* 10 */
365 {10, 0xfb, 0xff, 0xff, 0xff, 0xff, 0x1f, 0xff, 0xff, 0xc7, 0, 0,
366 0, 0, 0, 0} },
367 {0, 0xa, 0, F_D_OUT | FF_DIRECT_IO, resp_write_dt0, NULL, /* 6 */
368 {6, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
369 {0, 0xaa, 0, F_D_OUT | FF_DIRECT_IO, resp_write_dt0, NULL, /* 12 */
370 {12, 0xfb, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x9f,
371 0xc7, 0, 0, 0, 0} },
372 };
373
374 static const struct opcode_info_t sa_in_iarr[1] = {
375 {0, 0x9e, 0x12, F_SA_LOW | F_D_IN, resp_get_lba_status, NULL,
376 {16, 0x12, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
377 0xff, 0xff, 0xff, 0, 0xc7} },
378 };
379
380 static const struct opcode_info_t vl_iarr[1] = { /* VARIABLE LENGTH */
381 {0, 0x7f, 0xb, F_SA_HIGH | F_D_OUT | FF_DIRECT_IO, resp_write_dt0,
382 NULL, {32, 0xc7, 0, 0, 0, 0, 0x1f, 0x18, 0x0, 0xb, 0xfa,
383 0, 0xff, 0xff, 0xff, 0xff} }, /* WRITE(32) */
384 };
385
386 static const struct opcode_info_t maint_in_iarr[2] = {
387 {0, 0xa3, 0xc, F_SA_LOW | F_D_IN, resp_rsup_opcodes, NULL,
388 {12, 0xc, 0x87, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0,
389 0xc7, 0, 0, 0, 0} },
390 {0, 0xa3, 0xd, F_SA_LOW | F_D_IN, resp_rsup_tmfs, NULL,
391 {12, 0xd, 0x80, 0, 0, 0, 0xff, 0xff, 0xff, 0xff, 0, 0xc7, 0, 0,
392 0, 0} },
393 };
394
395 static const struct opcode_info_t write_same_iarr[1] = {
396 {0, 0x93, 0, F_D_OUT_MAYBE | FF_DIRECT_IO, resp_write_same_16, NULL,
397 {16, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
398 0xff, 0xff, 0xff, 0x1f, 0xc7} },
399 };
400
401 static const struct opcode_info_t reserve_iarr[1] = {
402 {0, 0x16, 0, F_D_OUT, NULL, NULL, /* RESERVE(6) */
403 {6, 0x1f, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
404 };
405
406 static const struct opcode_info_t release_iarr[1] = {
407 {0, 0x17, 0, F_D_OUT, NULL, NULL, /* RELEASE(6) */
408 {6, 0x1f, 0xff, 0, 0, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
409 };
410
411
412 /* This array is accessed via SDEB_I_* values. Make sure all are mapped,
413 * plus the terminating elements for logic that scans this table such as
414 * REPORT SUPPORTED OPERATION CODES. */
415 static const struct opcode_info_t opcode_info_arr[SDEB_I_LAST_ELEMENT + 1] = {
416 /* 0 */
417 {0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL,
418 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
419 {0, 0x12, 0, FF_RESPOND | F_D_IN, resp_inquiry, NULL,
420 {6, 0xe3, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
421 {0, 0xa0, 0, FF_RESPOND | F_D_IN, resp_report_luns, NULL,
422 {12, 0xe3, 0xff, 0, 0, 0, 0xff, 0xff, 0xff, 0xff, 0, 0xc7, 0, 0,
423 0, 0} },
424 {0, 0x3, 0, FF_RESPOND | F_D_IN, resp_requests, NULL,
425 {6, 0xe1, 0, 0, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
426 {0, 0x0, 0, F_M_ACCESS | F_RL_WLUN_OK, NULL, NULL,/* TEST UNIT READY */
427 {6, 0, 0, 0, 0, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
428 {1, 0x5a, 0, F_D_IN, resp_mode_sense, msense_iarr,
429 {10, 0xf8, 0xff, 0xff, 0, 0, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0,
430 0} },
431 {1, 0x55, 0, F_D_OUT, resp_mode_select, mselect_iarr,
432 {10, 0xf1, 0, 0, 0, 0, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0} },
433 {0, 0x4d, 0, F_D_IN, resp_log_sense, NULL,
434 {10, 0xe3, 0xff, 0xff, 0, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0,
435 0, 0, 0} },
436 {0, 0x25, 0, F_D_IN, resp_readcap, NULL,
437 {10, 0xe1, 0xff, 0xff, 0xff, 0xff, 0, 0, 0x1, 0xc7, 0, 0, 0, 0,
438 0, 0} },
439 {3, 0x88, 0, F_D_IN | FF_DIRECT_IO, resp_read_dt0, read_iarr,
440 {16, 0xfe, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
441 0xff, 0xff, 0xff, 0x9f, 0xc7} }, /* READ(16) */
442 /* 10 */
443 {3, 0x8a, 0, F_D_OUT | FF_DIRECT_IO, resp_write_dt0, write_iarr,
444 {16, 0xfa, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
445 0xff, 0xff, 0xff, 0x9f, 0xc7} }, /* WRITE(16) */
446 {0, 0x1b, 0, 0, resp_start_stop, NULL, /* START STOP UNIT */
447 {6, 0x1, 0, 0xf, 0xf7, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
448 {1, 0x9e, 0x10, F_SA_LOW | F_D_IN, resp_readcap16, sa_in_iarr,
449 {16, 0x10, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
450 0xff, 0xff, 0xff, 0x1, 0xc7} }, /* READ CAPACITY(16) */
451 {0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL, /* SA OUT */
452 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
453 {2, 0xa3, 0xa, F_SA_LOW | F_D_IN, resp_report_tgtpgs, maint_in_iarr,
454 {12, 0xea, 0, 0, 0, 0, 0xff, 0xff, 0xff, 0xff, 0, 0xc7, 0, 0, 0,
455 0} },
456 {0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL, /* MAINT OUT */
457 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
458 {0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL, /* VERIFY */
459 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
460 {1, 0x7f, 0x9, F_SA_HIGH | F_D_IN | FF_DIRECT_IO, resp_read_dt0,
461 vl_iarr, {32, 0xc7, 0, 0, 0, 0, 0x1f, 0x18, 0x0, 0x9, 0xfe, 0,
462 0xff, 0xff, 0xff, 0xff} },/* VARIABLE LENGTH, READ(32) */
463 {1, 0x56, 0, F_D_OUT, NULL, reserve_iarr, /* RESERVE(10) */
464 {10, 0xff, 0xff, 0xff, 0, 0, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0,
465 0} },
466 {1, 0x57, 0, F_D_OUT, NULL, release_iarr, /* RELEASE(10) */
467 {10, 0x13, 0xff, 0xff, 0, 0, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0,
468 0} },
469 /* 20 */
470 {0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL, /* ALLOW REMOVAL */
471 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
472 {0, 0x1, 0, 0, resp_start_stop, NULL, /* REWIND ?? */
473 {6, 0x1, 0, 0, 0, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
474 {0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL, /* ATA_PT */
475 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
476 {0, 0x1d, F_D_OUT, 0, NULL, NULL, /* SEND DIAGNOSTIC */
477 {6, 0xf7, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
478 {0, 0x42, 0, F_D_OUT | FF_DIRECT_IO, resp_unmap, NULL, /* UNMAP */
479 {10, 0x1, 0, 0, 0, 0, 0x1f, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0} },
480 {0, 0x53, 0, F_D_IN | F_D_OUT | FF_DIRECT_IO, resp_xdwriteread_10,
481 NULL, {10, 0xff, 0xff, 0xff, 0xff, 0xff, 0x1f, 0xff, 0xff, 0xc7,
482 0, 0, 0, 0, 0, 0} },
483 {0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL, /* WRITE_BUFFER */
484 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
485 {1, 0x41, 0, F_D_OUT_MAYBE | FF_DIRECT_IO, resp_write_same_10,
486 write_same_iarr, {10, 0xff, 0xff, 0xff, 0xff, 0xff, 0x1f, 0xff,
487 0xff, 0xc7, 0, 0, 0, 0, 0, 0} },
488 {0, 0x35, 0, F_DELAY_OVERR | FF_DIRECT_IO, NULL, NULL, /* SYNC_CACHE */
489 {10, 0x7, 0xff, 0xff, 0xff, 0xff, 0x1f, 0xff, 0xff, 0xc7, 0, 0,
490 0, 0, 0, 0} },
491 {0, 0x89, 0, F_D_OUT | FF_DIRECT_IO, resp_comp_write, NULL,
492 {16, 0xf8, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0, 0,
493 0, 0xff, 0x1f, 0xc7} }, /* COMPARE AND WRITE */
494
495 /* 30 */
496 {0xff, 0, 0, 0, NULL, NULL, /* terminating element */
497 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
498 };
499
500 struct sdebug_scmd_extra_t {
501 bool inj_recovered;
502 bool inj_transport;
503 bool inj_dif;
504 bool inj_dix;
505 bool inj_short;
506 };
507
508 static int scsi_debug_add_host = DEF_NUM_HOST;
509 static int scsi_debug_ato = DEF_ATO;
510 static int scsi_debug_delay = DEF_DELAY;
511 static int scsi_debug_dev_size_mb = DEF_DEV_SIZE_MB;
512 static int scsi_debug_dif = DEF_DIF;
513 static int scsi_debug_dix = DEF_DIX;
514 static int scsi_debug_dsense = DEF_D_SENSE;
515 static int scsi_debug_every_nth = DEF_EVERY_NTH;
516 static int scsi_debug_fake_rw = DEF_FAKE_RW;
517 static unsigned int scsi_debug_guard = DEF_GUARD;
518 static int scsi_debug_lowest_aligned = DEF_LOWEST_ALIGNED;
519 static int scsi_debug_max_luns = DEF_MAX_LUNS;
520 static int scsi_debug_max_queue = SCSI_DEBUG_CANQUEUE;
521 static atomic_t retired_max_queue; /* if > 0 then was prior max_queue */
522 static int scsi_debug_ndelay = DEF_NDELAY;
523 static int scsi_debug_no_lun_0 = DEF_NO_LUN_0;
524 static int scsi_debug_no_uld = 0;
525 static int scsi_debug_num_parts = DEF_NUM_PARTS;
526 static int scsi_debug_num_tgts = DEF_NUM_TGTS; /* targets per host */
527 static int scsi_debug_opt_blks = DEF_OPT_BLKS;
528 static int scsi_debug_opts = DEF_OPTS;
529 static int scsi_debug_physblk_exp = DEF_PHYSBLK_EXP;
530 static int scsi_debug_ptype = DEF_PTYPE; /* SCSI peripheral type (0==disk) */
531 static int scsi_debug_scsi_level = DEF_SCSI_LEVEL;
532 static int scsi_debug_sector_size = DEF_SECTOR_SIZE;
533 static int scsi_debug_virtual_gb = DEF_VIRTUAL_GB;
534 static int scsi_debug_vpd_use_hostno = DEF_VPD_USE_HOSTNO;
535 static unsigned int scsi_debug_lbpu = DEF_LBPU;
536 static unsigned int scsi_debug_lbpws = DEF_LBPWS;
537 static unsigned int scsi_debug_lbpws10 = DEF_LBPWS10;
538 static unsigned int scsi_debug_lbprz = DEF_LBPRZ;
539 static unsigned int scsi_debug_unmap_alignment = DEF_UNMAP_ALIGNMENT;
540 static unsigned int scsi_debug_unmap_granularity = DEF_UNMAP_GRANULARITY;
541 static unsigned int scsi_debug_unmap_max_blocks = DEF_UNMAP_MAX_BLOCKS;
542 static unsigned int scsi_debug_unmap_max_desc = DEF_UNMAP_MAX_DESC;
543 static unsigned int scsi_debug_write_same_length = DEF_WRITESAME_LENGTH;
544 static bool scsi_debug_removable = DEF_REMOVABLE;
545 static bool scsi_debug_clustering;
546 static bool scsi_debug_host_lock = DEF_HOST_LOCK;
547 static bool scsi_debug_strict = DEF_STRICT;
548 static bool sdebug_any_injecting_opt;
549
550 static atomic_t sdebug_cmnd_count;
551 static atomic_t sdebug_completions;
552 static atomic_t sdebug_a_tsf; /* counter of 'almost' TSFs */
553
554 #define DEV_READONLY(TGT) (0)
555
556 static unsigned int sdebug_store_sectors;
557 static sector_t sdebug_capacity; /* in sectors */
558
559 /* old BIOS stuff, kernel may get rid of them but some mode sense pages
560 may still need them */
561 static int sdebug_heads; /* heads per disk */
562 static int sdebug_cylinders_per; /* cylinders per surface */
563 static int sdebug_sectors_per; /* sectors per cylinder */
564
565 #define SDEBUG_MAX_PARTS 4
566
567 #define SCSI_DEBUG_MAX_CMD_LEN 32
568
569 static unsigned int scsi_debug_lbp(void)
570 {
571 return ((0 == scsi_debug_fake_rw) &&
572 (scsi_debug_lbpu | scsi_debug_lbpws | scsi_debug_lbpws10));
573 }
574
575 struct sdebug_dev_info {
576 struct list_head dev_list;
577 unsigned int channel;
578 unsigned int target;
579 u64 lun;
580 struct sdebug_host_info *sdbg_host;
581 unsigned long uas_bm[1];
582 atomic_t num_in_q;
583 char stopped; /* TODO: should be atomic */
584 bool used;
585 };
586
587 struct sdebug_host_info {
588 struct list_head host_list;
589 struct Scsi_Host *shost;
590 struct device dev;
591 struct list_head dev_info_list;
592 };
593
594 #define to_sdebug_host(d) \
595 container_of(d, struct sdebug_host_info, dev)
596
597 static LIST_HEAD(sdebug_host_list);
598 static DEFINE_SPINLOCK(sdebug_host_list_lock);
599
600
601 struct sdebug_hrtimer { /* ... is derived from hrtimer */
602 struct hrtimer hrt; /* must be first element */
603 int qa_indx;
604 };
605
606 struct sdebug_queued_cmd {
607 /* in_use flagged by a bit in queued_in_use_bm[] */
608 struct timer_list *cmnd_timerp;
609 struct tasklet_struct *tletp;
610 struct sdebug_hrtimer *sd_hrtp;
611 struct scsi_cmnd * a_cmnd;
612 };
613 static struct sdebug_queued_cmd queued_arr[SCSI_DEBUG_CANQUEUE];
614 static unsigned long queued_in_use_bm[SCSI_DEBUG_CANQUEUE_WORDS];
615
616
617 static unsigned char * fake_storep; /* ramdisk storage */
618 static struct sd_dif_tuple *dif_storep; /* protection info */
619 static void *map_storep; /* provisioning map */
620
621 static unsigned long map_size;
622 static int num_aborts;
623 static int num_dev_resets;
624 static int num_target_resets;
625 static int num_bus_resets;
626 static int num_host_resets;
627 static int dix_writes;
628 static int dix_reads;
629 static int dif_errors;
630
631 static DEFINE_SPINLOCK(queued_arr_lock);
632 static DEFINE_RWLOCK(atomic_rw);
633
634 static char sdebug_proc_name[] = MY_NAME;
635 static const char *my_name = MY_NAME;
636
637 static struct bus_type pseudo_lld_bus;
638
639 static struct device_driver sdebug_driverfs_driver = {
640 .name = sdebug_proc_name,
641 .bus = &pseudo_lld_bus,
642 };
643
644 static const int check_condition_result =
645 (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
646
647 static const int illegal_condition_result =
648 (DRIVER_SENSE << 24) | (DID_ABORT << 16) | SAM_STAT_CHECK_CONDITION;
649
650 static const int device_qfull_result =
651 (DID_OK << 16) | (COMMAND_COMPLETE << 8) | SAM_STAT_TASK_SET_FULL;
652
653 static unsigned char caching_pg[] = {0x8, 18, 0x14, 0, 0xff, 0xff, 0, 0,
654 0xff, 0xff, 0xff, 0xff, 0x80, 0x14, 0, 0,
655 0, 0, 0, 0};
656 static unsigned char ctrl_m_pg[] = {0xa, 10, 2, 0, 0, 0, 0, 0,
657 0, 0, 0x2, 0x4b};
658 static unsigned char iec_m_pg[] = {0x1c, 0xa, 0x08, 0, 0, 0, 0, 0,
659 0, 0, 0x0, 0x0};
660
661 static void *fake_store(unsigned long long lba)
662 {
663 lba = do_div(lba, sdebug_store_sectors);
664
665 return fake_storep + lba * scsi_debug_sector_size;
666 }
667
668 static struct sd_dif_tuple *dif_store(sector_t sector)
669 {
670 sector = do_div(sector, sdebug_store_sectors);
671
672 return dif_storep + sector;
673 }
674
675 static int sdebug_add_adapter(void);
676 static void sdebug_remove_adapter(void);
677
678 static void sdebug_max_tgts_luns(void)
679 {
680 struct sdebug_host_info *sdbg_host;
681 struct Scsi_Host *hpnt;
682
683 spin_lock(&sdebug_host_list_lock);
684 list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) {
685 hpnt = sdbg_host->shost;
686 if ((hpnt->this_id >= 0) &&
687 (scsi_debug_num_tgts > hpnt->this_id))
688 hpnt->max_id = scsi_debug_num_tgts + 1;
689 else
690 hpnt->max_id = scsi_debug_num_tgts;
691 /* scsi_debug_max_luns; */
692 hpnt->max_lun = SAM2_WLUN_REPORT_LUNS;
693 }
694 spin_unlock(&sdebug_host_list_lock);
695 }
696
697 enum sdeb_cmd_data {SDEB_IN_DATA = 0, SDEB_IN_CDB = 1};
698
699 /* Set in_bit to -1 to indicate no bit position of invalid field */
700 static void
701 mk_sense_invalid_fld(struct scsi_cmnd *scp, enum sdeb_cmd_data c_d,
702 int in_byte, int in_bit)
703 {
704 unsigned char *sbuff;
705 u8 sks[4];
706 int sl, asc;
707
708 sbuff = scp->sense_buffer;
709 if (!sbuff) {
710 sdev_printk(KERN_ERR, scp->device,
711 "%s: sense_buffer is NULL\n", __func__);
712 return;
713 }
714 asc = c_d ? INVALID_FIELD_IN_CDB : INVALID_FIELD_IN_PARAM_LIST;
715 memset(sbuff, 0, SCSI_SENSE_BUFFERSIZE);
716 scsi_build_sense_buffer(scsi_debug_dsense, sbuff, ILLEGAL_REQUEST,
717 asc, 0);
718 memset(sks, 0, sizeof(sks));
719 sks[0] = 0x80;
720 if (c_d)
721 sks[0] |= 0x40;
722 if (in_bit >= 0) {
723 sks[0] |= 0x8;
724 sks[0] |= 0x7 & in_bit;
725 }
726 put_unaligned_be16(in_byte, sks + 1);
727 if (scsi_debug_dsense) {
728 sl = sbuff[7] + 8;
729 sbuff[7] = sl;
730 sbuff[sl] = 0x2;
731 sbuff[sl + 1] = 0x6;
732 memcpy(sbuff + sl + 4, sks, 3);
733 } else
734 memcpy(sbuff + 15, sks, 3);
735 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
736 sdev_printk(KERN_INFO, scp->device, "%s: [sense_key,asc,ascq"
737 "]: [0x5,0x%x,0x0] %c byte=%d, bit=%d\n",
738 my_name, asc, c_d ? 'C' : 'D', in_byte, in_bit);
739 }
740
741 static void mk_sense_buffer(struct scsi_cmnd *scp, int key, int asc, int asq)
742 {
743 unsigned char *sbuff;
744
745 sbuff = scp->sense_buffer;
746 if (!sbuff) {
747 sdev_printk(KERN_ERR, scp->device,
748 "%s: sense_buffer is NULL\n", __func__);
749 return;
750 }
751 memset(sbuff, 0, SCSI_SENSE_BUFFERSIZE);
752
753 scsi_build_sense_buffer(scsi_debug_dsense, sbuff, key, asc, asq);
754
755 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
756 sdev_printk(KERN_INFO, scp->device,
757 "%s: [sense_key,asc,ascq]: [0x%x,0x%x,0x%x]\n",
758 my_name, key, asc, asq);
759 }
760
761 static void
762 mk_sense_invalid_opcode(struct scsi_cmnd *scp)
763 {
764 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_OPCODE, 0);
765 }
766
767 static int scsi_debug_ioctl(struct scsi_device *dev, int cmd, void __user *arg)
768 {
769 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) {
770 if (0x1261 == cmd)
771 sdev_printk(KERN_INFO, dev,
772 "%s: BLKFLSBUF [0x1261]\n", __func__);
773 else if (0x5331 == cmd)
774 sdev_printk(KERN_INFO, dev,
775 "%s: CDROM_GET_CAPABILITY [0x5331]\n",
776 __func__);
777 else
778 sdev_printk(KERN_INFO, dev, "%s: cmd=0x%x\n",
779 __func__, cmd);
780 }
781 return -EINVAL;
782 /* return -ENOTTY; // correct return but upsets fdisk */
783 }
784
785 static int check_readiness(struct scsi_cmnd *SCpnt, int uas_only,
786 struct sdebug_dev_info * devip)
787 {
788 int k;
789 bool debug = !!(SCSI_DEBUG_OPT_NOISE & scsi_debug_opts);
790
791 k = find_first_bit(devip->uas_bm, SDEBUG_NUM_UAS);
792 if (k != SDEBUG_NUM_UAS) {
793 const char *cp = NULL;
794
795 switch (k) {
796 case SDEBUG_UA_POR:
797 mk_sense_buffer(SCpnt, UNIT_ATTENTION,
798 UA_RESET_ASC, POWER_ON_RESET_ASCQ);
799 if (debug)
800 cp = "power on reset";
801 break;
802 case SDEBUG_UA_BUS_RESET:
803 mk_sense_buffer(SCpnt, UNIT_ATTENTION,
804 UA_RESET_ASC, BUS_RESET_ASCQ);
805 if (debug)
806 cp = "bus reset";
807 break;
808 case SDEBUG_UA_MODE_CHANGED:
809 mk_sense_buffer(SCpnt, UNIT_ATTENTION,
810 UA_CHANGED_ASC, MODE_CHANGED_ASCQ);
811 if (debug)
812 cp = "mode parameters changed";
813 break;
814 case SDEBUG_UA_CAPACITY_CHANGED:
815 mk_sense_buffer(SCpnt, UNIT_ATTENTION,
816 UA_CHANGED_ASC, CAPACITY_CHANGED_ASCQ);
817 if (debug)
818 cp = "capacity data changed";
819 break;
820 default:
821 pr_warn("%s: unexpected unit attention code=%d\n",
822 __func__, k);
823 if (debug)
824 cp = "unknown";
825 break;
826 }
827 clear_bit(k, devip->uas_bm);
828 if (debug)
829 sdev_printk(KERN_INFO, SCpnt->device,
830 "%s reports: Unit attention: %s\n",
831 my_name, cp);
832 return check_condition_result;
833 }
834 if ((UAS_TUR == uas_only) && devip->stopped) {
835 mk_sense_buffer(SCpnt, NOT_READY, LOGICAL_UNIT_NOT_READY,
836 0x2);
837 if (debug)
838 sdev_printk(KERN_INFO, SCpnt->device,
839 "%s reports: Not ready: %s\n", my_name,
840 "initializing command required");
841 return check_condition_result;
842 }
843 return 0;
844 }
845
846 /* Returns 0 if ok else (DID_ERROR << 16). Sets scp->resid . */
847 static int fill_from_dev_buffer(struct scsi_cmnd *scp, unsigned char *arr,
848 int arr_len)
849 {
850 int act_len;
851 struct scsi_data_buffer *sdb = scsi_in(scp);
852
853 if (!sdb->length)
854 return 0;
855 if (!(scsi_bidi_cmnd(scp) || scp->sc_data_direction == DMA_FROM_DEVICE))
856 return (DID_ERROR << 16);
857
858 act_len = sg_copy_from_buffer(sdb->table.sgl, sdb->table.nents,
859 arr, arr_len);
860 sdb->resid = scsi_bufflen(scp) - act_len;
861
862 return 0;
863 }
864
865 /* Returns number of bytes fetched into 'arr' or -1 if error. */
866 static int fetch_to_dev_buffer(struct scsi_cmnd *scp, unsigned char *arr,
867 int arr_len)
868 {
869 if (!scsi_bufflen(scp))
870 return 0;
871 if (!(scsi_bidi_cmnd(scp) || scp->sc_data_direction == DMA_TO_DEVICE))
872 return -1;
873
874 return scsi_sg_copy_to_buffer(scp, arr, arr_len);
875 }
876
877
878 static const char * inq_vendor_id = "Linux ";
879 static const char * inq_product_id = "scsi_debug ";
880 static const char *inq_product_rev = "0184"; /* version less '.' */
881
882 /* Device identification VPD page. Returns number of bytes placed in arr */
883 static int inquiry_evpd_83(unsigned char * arr, int port_group_id,
884 int target_dev_id, int dev_id_num,
885 const char * dev_id_str,
886 int dev_id_str_len)
887 {
888 int num, port_a;
889 char b[32];
890
891 port_a = target_dev_id + 1;
892 /* T10 vendor identifier field format (faked) */
893 arr[0] = 0x2; /* ASCII */
894 arr[1] = 0x1;
895 arr[2] = 0x0;
896 memcpy(&arr[4], inq_vendor_id, 8);
897 memcpy(&arr[12], inq_product_id, 16);
898 memcpy(&arr[28], dev_id_str, dev_id_str_len);
899 num = 8 + 16 + dev_id_str_len;
900 arr[3] = num;
901 num += 4;
902 if (dev_id_num >= 0) {
903 /* NAA-5, Logical unit identifier (binary) */
904 arr[num++] = 0x1; /* binary (not necessarily sas) */
905 arr[num++] = 0x3; /* PIV=0, lu, naa */
906 arr[num++] = 0x0;
907 arr[num++] = 0x8;
908 arr[num++] = 0x53; /* naa-5 ieee company id=0x333333 (fake) */
909 arr[num++] = 0x33;
910 arr[num++] = 0x33;
911 arr[num++] = 0x30;
912 arr[num++] = (dev_id_num >> 24);
913 arr[num++] = (dev_id_num >> 16) & 0xff;
914 arr[num++] = (dev_id_num >> 8) & 0xff;
915 arr[num++] = dev_id_num & 0xff;
916 /* Target relative port number */
917 arr[num++] = 0x61; /* proto=sas, binary */
918 arr[num++] = 0x94; /* PIV=1, target port, rel port */
919 arr[num++] = 0x0; /* reserved */
920 arr[num++] = 0x4; /* length */
921 arr[num++] = 0x0; /* reserved */
922 arr[num++] = 0x0; /* reserved */
923 arr[num++] = 0x0;
924 arr[num++] = 0x1; /* relative port A */
925 }
926 /* NAA-5, Target port identifier */
927 arr[num++] = 0x61; /* proto=sas, binary */
928 arr[num++] = 0x93; /* piv=1, target port, naa */
929 arr[num++] = 0x0;
930 arr[num++] = 0x8;
931 arr[num++] = 0x52; /* naa-5, company id=0x222222 (fake) */
932 arr[num++] = 0x22;
933 arr[num++] = 0x22;
934 arr[num++] = 0x20;
935 arr[num++] = (port_a >> 24);
936 arr[num++] = (port_a >> 16) & 0xff;
937 arr[num++] = (port_a >> 8) & 0xff;
938 arr[num++] = port_a & 0xff;
939 /* NAA-5, Target port group identifier */
940 arr[num++] = 0x61; /* proto=sas, binary */
941 arr[num++] = 0x95; /* piv=1, target port group id */
942 arr[num++] = 0x0;
943 arr[num++] = 0x4;
944 arr[num++] = 0;
945 arr[num++] = 0;
946 arr[num++] = (port_group_id >> 8) & 0xff;
947 arr[num++] = port_group_id & 0xff;
948 /* NAA-5, Target device identifier */
949 arr[num++] = 0x61; /* proto=sas, binary */
950 arr[num++] = 0xa3; /* piv=1, target device, naa */
951 arr[num++] = 0x0;
952 arr[num++] = 0x8;
953 arr[num++] = 0x52; /* naa-5, company id=0x222222 (fake) */
954 arr[num++] = 0x22;
955 arr[num++] = 0x22;
956 arr[num++] = 0x20;
957 arr[num++] = (target_dev_id >> 24);
958 arr[num++] = (target_dev_id >> 16) & 0xff;
959 arr[num++] = (target_dev_id >> 8) & 0xff;
960 arr[num++] = target_dev_id & 0xff;
961 /* SCSI name string: Target device identifier */
962 arr[num++] = 0x63; /* proto=sas, UTF-8 */
963 arr[num++] = 0xa8; /* piv=1, target device, SCSI name string */
964 arr[num++] = 0x0;
965 arr[num++] = 24;
966 memcpy(arr + num, "naa.52222220", 12);
967 num += 12;
968 snprintf(b, sizeof(b), "%08X", target_dev_id);
969 memcpy(arr + num, b, 8);
970 num += 8;
971 memset(arr + num, 0, 4);
972 num += 4;
973 return num;
974 }
975
976
977 static unsigned char vpd84_data[] = {
978 /* from 4th byte */ 0x22,0x22,0x22,0x0,0xbb,0x0,
979 0x22,0x22,0x22,0x0,0xbb,0x1,
980 0x22,0x22,0x22,0x0,0xbb,0x2,
981 };
982
983 /* Software interface identification VPD page */
984 static int inquiry_evpd_84(unsigned char * arr)
985 {
986 memcpy(arr, vpd84_data, sizeof(vpd84_data));
987 return sizeof(vpd84_data);
988 }
989
990 /* Management network addresses VPD page */
991 static int inquiry_evpd_85(unsigned char * arr)
992 {
993 int num = 0;
994 const char * na1 = "https://www.kernel.org/config";
995 const char * na2 = "http://www.kernel.org/log";
996 int plen, olen;
997
998 arr[num++] = 0x1; /* lu, storage config */
999 arr[num++] = 0x0; /* reserved */
1000 arr[num++] = 0x0;
1001 olen = strlen(na1);
1002 plen = olen + 1;
1003 if (plen % 4)
1004 plen = ((plen / 4) + 1) * 4;
1005 arr[num++] = plen; /* length, null termianted, padded */
1006 memcpy(arr + num, na1, olen);
1007 memset(arr + num + olen, 0, plen - olen);
1008 num += plen;
1009
1010 arr[num++] = 0x4; /* lu, logging */
1011 arr[num++] = 0x0; /* reserved */
1012 arr[num++] = 0x0;
1013 olen = strlen(na2);
1014 plen = olen + 1;
1015 if (plen % 4)
1016 plen = ((plen / 4) + 1) * 4;
1017 arr[num++] = plen; /* length, null terminated, padded */
1018 memcpy(arr + num, na2, olen);
1019 memset(arr + num + olen, 0, plen - olen);
1020 num += plen;
1021
1022 return num;
1023 }
1024
1025 /* SCSI ports VPD page */
1026 static int inquiry_evpd_88(unsigned char * arr, int target_dev_id)
1027 {
1028 int num = 0;
1029 int port_a, port_b;
1030
1031 port_a = target_dev_id + 1;
1032 port_b = port_a + 1;
1033 arr[num++] = 0x0; /* reserved */
1034 arr[num++] = 0x0; /* reserved */
1035 arr[num++] = 0x0;
1036 arr[num++] = 0x1; /* relative port 1 (primary) */
1037 memset(arr + num, 0, 6);
1038 num += 6;
1039 arr[num++] = 0x0;
1040 arr[num++] = 12; /* length tp descriptor */
1041 /* naa-5 target port identifier (A) */
1042 arr[num++] = 0x61; /* proto=sas, binary */
1043 arr[num++] = 0x93; /* PIV=1, target port, NAA */
1044 arr[num++] = 0x0; /* reserved */
1045 arr[num++] = 0x8; /* length */
1046 arr[num++] = 0x52; /* NAA-5, company_id=0x222222 (fake) */
1047 arr[num++] = 0x22;
1048 arr[num++] = 0x22;
1049 arr[num++] = 0x20;
1050 arr[num++] = (port_a >> 24);
1051 arr[num++] = (port_a >> 16) & 0xff;
1052 arr[num++] = (port_a >> 8) & 0xff;
1053 arr[num++] = port_a & 0xff;
1054
1055 arr[num++] = 0x0; /* reserved */
1056 arr[num++] = 0x0; /* reserved */
1057 arr[num++] = 0x0;
1058 arr[num++] = 0x2; /* relative port 2 (secondary) */
1059 memset(arr + num, 0, 6);
1060 num += 6;
1061 arr[num++] = 0x0;
1062 arr[num++] = 12; /* length tp descriptor */
1063 /* naa-5 target port identifier (B) */
1064 arr[num++] = 0x61; /* proto=sas, binary */
1065 arr[num++] = 0x93; /* PIV=1, target port, NAA */
1066 arr[num++] = 0x0; /* reserved */
1067 arr[num++] = 0x8; /* length */
1068 arr[num++] = 0x52; /* NAA-5, company_id=0x222222 (fake) */
1069 arr[num++] = 0x22;
1070 arr[num++] = 0x22;
1071 arr[num++] = 0x20;
1072 arr[num++] = (port_b >> 24);
1073 arr[num++] = (port_b >> 16) & 0xff;
1074 arr[num++] = (port_b >> 8) & 0xff;
1075 arr[num++] = port_b & 0xff;
1076
1077 return num;
1078 }
1079
1080
1081 static unsigned char vpd89_data[] = {
1082 /* from 4th byte */ 0,0,0,0,
1083 'l','i','n','u','x',' ',' ',' ',
1084 'S','A','T',' ','s','c','s','i','_','d','e','b','u','g',' ',' ',
1085 '1','2','3','4',
1086 0x34,0,0,0,1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,
1087 0xec,0,0,0,
1088 0x5a,0xc,0xff,0x3f,0x37,0xc8,0x10,0,0,0,0,0,0x3f,0,0,0,
1089 0,0,0,0,0x58,0x58,0x58,0x58,0x58,0x58,0x58,0x58,0x20,0x20,0x20,0x20,
1090 0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0,0,0,0x40,0x4,0,0x2e,0x33,
1091 0x38,0x31,0x20,0x20,0x20,0x20,0x54,0x53,0x38,0x33,0x30,0x30,0x33,0x31,
1092 0x53,0x41,
1093 0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,
1094 0x20,0x20,
1095 0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,
1096 0x10,0x80,
1097 0,0,0,0x2f,0,0,0,0x2,0,0x2,0x7,0,0xff,0xff,0x1,0,
1098 0x3f,0,0xc1,0xff,0x3e,0,0x10,0x1,0xb0,0xf8,0x50,0x9,0,0,0x7,0,
1099 0x3,0,0x78,0,0x78,0,0xf0,0,0x78,0,0,0,0,0,0,0,
1100 0,0,0,0,0,0,0,0,0x2,0,0,0,0,0,0,0,
1101 0x7e,0,0x1b,0,0x6b,0x34,0x1,0x7d,0x3,0x40,0x69,0x34,0x1,0x3c,0x3,0x40,
1102 0x7f,0x40,0,0,0,0,0xfe,0xfe,0,0,0,0,0,0xfe,0,0,
1103 0,0,0,0,0,0,0,0,0xb0,0xf8,0x50,0x9,0,0,0,0,
1104 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1105 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1106 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1107 0x1,0,0xb0,0xf8,0x50,0x9,0xb0,0xf8,0x50,0x9,0x20,0x20,0x2,0,0xb6,0x42,
1108 0,0x80,0x8a,0,0x6,0x3c,0xa,0x3c,0xff,0xff,0xc6,0x7,0,0x1,0,0x8,
1109 0xf0,0xf,0,0x10,0x2,0,0x30,0,0,0,0,0,0,0,0x6,0xfe,
1110 0,0,0x2,0,0x50,0,0x8a,0,0x4f,0x95,0,0,0x21,0,0xb,0,
1111 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1112 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1113 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1114 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1115 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1116 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1117 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1118 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1119 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1120 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1121 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1122 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0xa5,0x51,
1123 };
1124
1125 /* ATA Information VPD page */
1126 static int inquiry_evpd_89(unsigned char * arr)
1127 {
1128 memcpy(arr, vpd89_data, sizeof(vpd89_data));
1129 return sizeof(vpd89_data);
1130 }
1131
1132
1133 static unsigned char vpdb0_data[] = {
1134 /* from 4th byte */ 0,0,0,4, 0,0,0x4,0, 0,0,0,64,
1135 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1136 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1137 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1138 };
1139
1140 /* Block limits VPD page (SBC-3) */
1141 static int inquiry_evpd_b0(unsigned char * arr)
1142 {
1143 unsigned int gran;
1144
1145 memcpy(arr, vpdb0_data, sizeof(vpdb0_data));
1146
1147 /* Optimal transfer length granularity */
1148 gran = 1 << scsi_debug_physblk_exp;
1149 arr[2] = (gran >> 8) & 0xff;
1150 arr[3] = gran & 0xff;
1151
1152 /* Maximum Transfer Length */
1153 if (sdebug_store_sectors > 0x400) {
1154 arr[4] = (sdebug_store_sectors >> 24) & 0xff;
1155 arr[5] = (sdebug_store_sectors >> 16) & 0xff;
1156 arr[6] = (sdebug_store_sectors >> 8) & 0xff;
1157 arr[7] = sdebug_store_sectors & 0xff;
1158 }
1159
1160 /* Optimal Transfer Length */
1161 put_unaligned_be32(scsi_debug_opt_blks, &arr[8]);
1162
1163 if (scsi_debug_lbpu) {
1164 /* Maximum Unmap LBA Count */
1165 put_unaligned_be32(scsi_debug_unmap_max_blocks, &arr[16]);
1166
1167 /* Maximum Unmap Block Descriptor Count */
1168 put_unaligned_be32(scsi_debug_unmap_max_desc, &arr[20]);
1169 }
1170
1171 /* Unmap Granularity Alignment */
1172 if (scsi_debug_unmap_alignment) {
1173 put_unaligned_be32(scsi_debug_unmap_alignment, &arr[28]);
1174 arr[28] |= 0x80; /* UGAVALID */
1175 }
1176
1177 /* Optimal Unmap Granularity */
1178 put_unaligned_be32(scsi_debug_unmap_granularity, &arr[24]);
1179
1180 /* Maximum WRITE SAME Length */
1181 put_unaligned_be64(scsi_debug_write_same_length, &arr[32]);
1182
1183 return 0x3c; /* Mandatory page length for Logical Block Provisioning */
1184
1185 return sizeof(vpdb0_data);
1186 }
1187
1188 /* Block device characteristics VPD page (SBC-3) */
1189 static int inquiry_evpd_b1(unsigned char *arr)
1190 {
1191 memset(arr, 0, 0x3c);
1192 arr[0] = 0;
1193 arr[1] = 1; /* non rotating medium (e.g. solid state) */
1194 arr[2] = 0;
1195 arr[3] = 5; /* less than 1.8" */
1196
1197 return 0x3c;
1198 }
1199
1200 /* Logical block provisioning VPD page (SBC-3) */
1201 static int inquiry_evpd_b2(unsigned char *arr)
1202 {
1203 memset(arr, 0, 0x4);
1204 arr[0] = 0; /* threshold exponent */
1205
1206 if (scsi_debug_lbpu)
1207 arr[1] = 1 << 7;
1208
1209 if (scsi_debug_lbpws)
1210 arr[1] |= 1 << 6;
1211
1212 if (scsi_debug_lbpws10)
1213 arr[1] |= 1 << 5;
1214
1215 if (scsi_debug_lbprz)
1216 arr[1] |= 1 << 2;
1217
1218 return 0x4;
1219 }
1220
1221 #define SDEBUG_LONG_INQ_SZ 96
1222 #define SDEBUG_MAX_INQ_ARR_SZ 584
1223
1224 static int resp_inquiry(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
1225 {
1226 unsigned char pq_pdt;
1227 unsigned char * arr;
1228 unsigned char *cmd = scp->cmnd;
1229 int alloc_len, n, ret;
1230 bool have_wlun;
1231
1232 alloc_len = (cmd[3] << 8) + cmd[4];
1233 arr = kzalloc(SDEBUG_MAX_INQ_ARR_SZ, GFP_ATOMIC);
1234 if (! arr)
1235 return DID_REQUEUE << 16;
1236 have_wlun = (scp->device->lun == SAM2_WLUN_REPORT_LUNS);
1237 if (have_wlun)
1238 pq_pdt = 0x1e; /* present, wlun */
1239 else if (scsi_debug_no_lun_0 && (0 == devip->lun))
1240 pq_pdt = 0x7f; /* not present, no device type */
1241 else
1242 pq_pdt = (scsi_debug_ptype & 0x1f);
1243 arr[0] = pq_pdt;
1244 if (0x2 & cmd[1]) { /* CMDDT bit set */
1245 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 1);
1246 kfree(arr);
1247 return check_condition_result;
1248 } else if (0x1 & cmd[1]) { /* EVPD bit set */
1249 int lu_id_num, port_group_id, target_dev_id, len;
1250 char lu_id_str[6];
1251 int host_no = devip->sdbg_host->shost->host_no;
1252
1253 port_group_id = (((host_no + 1) & 0x7f) << 8) +
1254 (devip->channel & 0x7f);
1255 if (0 == scsi_debug_vpd_use_hostno)
1256 host_no = 0;
1257 lu_id_num = have_wlun ? -1 : (((host_no + 1) * 2000) +
1258 (devip->target * 1000) + devip->lun);
1259 target_dev_id = ((host_no + 1) * 2000) +
1260 (devip->target * 1000) - 3;
1261 len = scnprintf(lu_id_str, 6, "%d", lu_id_num);
1262 if (0 == cmd[2]) { /* supported vital product data pages */
1263 arr[1] = cmd[2]; /*sanity */
1264 n = 4;
1265 arr[n++] = 0x0; /* this page */
1266 arr[n++] = 0x80; /* unit serial number */
1267 arr[n++] = 0x83; /* device identification */
1268 arr[n++] = 0x84; /* software interface ident. */
1269 arr[n++] = 0x85; /* management network addresses */
1270 arr[n++] = 0x86; /* extended inquiry */
1271 arr[n++] = 0x87; /* mode page policy */
1272 arr[n++] = 0x88; /* SCSI ports */
1273 arr[n++] = 0x89; /* ATA information */
1274 arr[n++] = 0xb0; /* Block limits (SBC) */
1275 arr[n++] = 0xb1; /* Block characteristics (SBC) */
1276 if (scsi_debug_lbp()) /* Logical Block Prov. (SBC) */
1277 arr[n++] = 0xb2;
1278 arr[3] = n - 4; /* number of supported VPD pages */
1279 } else if (0x80 == cmd[2]) { /* unit serial number */
1280 arr[1] = cmd[2]; /*sanity */
1281 arr[3] = len;
1282 memcpy(&arr[4], lu_id_str, len);
1283 } else if (0x83 == cmd[2]) { /* device identification */
1284 arr[1] = cmd[2]; /*sanity */
1285 arr[3] = inquiry_evpd_83(&arr[4], port_group_id,
1286 target_dev_id, lu_id_num,
1287 lu_id_str, len);
1288 } else if (0x84 == cmd[2]) { /* Software interface ident. */
1289 arr[1] = cmd[2]; /*sanity */
1290 arr[3] = inquiry_evpd_84(&arr[4]);
1291 } else if (0x85 == cmd[2]) { /* Management network addresses */
1292 arr[1] = cmd[2]; /*sanity */
1293 arr[3] = inquiry_evpd_85(&arr[4]);
1294 } else if (0x86 == cmd[2]) { /* extended inquiry */
1295 arr[1] = cmd[2]; /*sanity */
1296 arr[3] = 0x3c; /* number of following entries */
1297 if (scsi_debug_dif == SD_DIF_TYPE3_PROTECTION)
1298 arr[4] = 0x4; /* SPT: GRD_CHK:1 */
1299 else if (scsi_debug_dif)
1300 arr[4] = 0x5; /* SPT: GRD_CHK:1, REF_CHK:1 */
1301 else
1302 arr[4] = 0x0; /* no protection stuff */
1303 arr[5] = 0x7; /* head of q, ordered + simple q's */
1304 } else if (0x87 == cmd[2]) { /* mode page policy */
1305 arr[1] = cmd[2]; /*sanity */
1306 arr[3] = 0x8; /* number of following entries */
1307 arr[4] = 0x2; /* disconnect-reconnect mp */
1308 arr[6] = 0x80; /* mlus, shared */
1309 arr[8] = 0x18; /* protocol specific lu */
1310 arr[10] = 0x82; /* mlus, per initiator port */
1311 } else if (0x88 == cmd[2]) { /* SCSI Ports */
1312 arr[1] = cmd[2]; /*sanity */
1313 arr[3] = inquiry_evpd_88(&arr[4], target_dev_id);
1314 } else if (0x89 == cmd[2]) { /* ATA information */
1315 arr[1] = cmd[2]; /*sanity */
1316 n = inquiry_evpd_89(&arr[4]);
1317 arr[2] = (n >> 8);
1318 arr[3] = (n & 0xff);
1319 } else if (0xb0 == cmd[2]) { /* Block limits (SBC) */
1320 arr[1] = cmd[2]; /*sanity */
1321 arr[3] = inquiry_evpd_b0(&arr[4]);
1322 } else if (0xb1 == cmd[2]) { /* Block characteristics (SBC) */
1323 arr[1] = cmd[2]; /*sanity */
1324 arr[3] = inquiry_evpd_b1(&arr[4]);
1325 } else if (0xb2 == cmd[2]) { /* Logical Block Prov. (SBC) */
1326 arr[1] = cmd[2]; /*sanity */
1327 arr[3] = inquiry_evpd_b2(&arr[4]);
1328 } else {
1329 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, -1);
1330 kfree(arr);
1331 return check_condition_result;
1332 }
1333 len = min(((arr[2] << 8) + arr[3]) + 4, alloc_len);
1334 ret = fill_from_dev_buffer(scp, arr,
1335 min(len, SDEBUG_MAX_INQ_ARR_SZ));
1336 kfree(arr);
1337 return ret;
1338 }
1339 /* drops through here for a standard inquiry */
1340 arr[1] = scsi_debug_removable ? 0x80 : 0; /* Removable disk */
1341 arr[2] = scsi_debug_scsi_level;
1342 arr[3] = 2; /* response_data_format==2 */
1343 arr[4] = SDEBUG_LONG_INQ_SZ - 5;
1344 arr[5] = scsi_debug_dif ? 1 : 0; /* PROTECT bit */
1345 if (0 == scsi_debug_vpd_use_hostno)
1346 arr[5] = 0x10; /* claim: implicit TGPS */
1347 arr[6] = 0x10; /* claim: MultiP */
1348 /* arr[6] |= 0x40; ... claim: EncServ (enclosure services) */
1349 arr[7] = 0xa; /* claim: LINKED + CMDQUE */
1350 memcpy(&arr[8], inq_vendor_id, 8);
1351 memcpy(&arr[16], inq_product_id, 16);
1352 memcpy(&arr[32], inq_product_rev, 4);
1353 /* version descriptors (2 bytes each) follow */
1354 arr[58] = 0x0; arr[59] = 0xa2; /* SAM-5 rev 4 */
1355 arr[60] = 0x4; arr[61] = 0x68; /* SPC-4 rev 37 */
1356 n = 62;
1357 if (scsi_debug_ptype == 0) {
1358 arr[n++] = 0x4; arr[n++] = 0xc5; /* SBC-4 rev 36 */
1359 } else if (scsi_debug_ptype == 1) {
1360 arr[n++] = 0x5; arr[n++] = 0x25; /* SSC-4 rev 3 */
1361 }
1362 arr[n++] = 0x20; arr[n++] = 0xe6; /* SPL-3 rev 7 */
1363 ret = fill_from_dev_buffer(scp, arr,
1364 min(alloc_len, SDEBUG_LONG_INQ_SZ));
1365 kfree(arr);
1366 return ret;
1367 }
1368
1369 static int resp_requests(struct scsi_cmnd * scp,
1370 struct sdebug_dev_info * devip)
1371 {
1372 unsigned char * sbuff;
1373 unsigned char *cmd = scp->cmnd;
1374 unsigned char arr[SCSI_SENSE_BUFFERSIZE];
1375 bool dsense, want_dsense;
1376 int len = 18;
1377
1378 memset(arr, 0, sizeof(arr));
1379 dsense = !!(cmd[1] & 1);
1380 want_dsense = dsense || scsi_debug_dsense;
1381 sbuff = scp->sense_buffer;
1382 if ((iec_m_pg[2] & 0x4) && (6 == (iec_m_pg[3] & 0xf))) {
1383 if (dsense) {
1384 arr[0] = 0x72;
1385 arr[1] = 0x0; /* NO_SENSE in sense_key */
1386 arr[2] = THRESHOLD_EXCEEDED;
1387 arr[3] = 0xff; /* TEST set and MRIE==6 */
1388 len = 8;
1389 } else {
1390 arr[0] = 0x70;
1391 arr[2] = 0x0; /* NO_SENSE in sense_key */
1392 arr[7] = 0xa; /* 18 byte sense buffer */
1393 arr[12] = THRESHOLD_EXCEEDED;
1394 arr[13] = 0xff; /* TEST set and MRIE==6 */
1395 }
1396 } else {
1397 memcpy(arr, sbuff, SCSI_SENSE_BUFFERSIZE);
1398 if (arr[0] >= 0x70 && dsense == scsi_debug_dsense)
1399 ; /* have sense and formats match */
1400 else if (arr[0] <= 0x70) {
1401 if (dsense) {
1402 memset(arr, 0, 8);
1403 arr[0] = 0x72;
1404 len = 8;
1405 } else {
1406 memset(arr, 0, 18);
1407 arr[0] = 0x70;
1408 arr[7] = 0xa;
1409 }
1410 } else if (dsense) {
1411 memset(arr, 0, 8);
1412 arr[0] = 0x72;
1413 arr[1] = sbuff[2]; /* sense key */
1414 arr[2] = sbuff[12]; /* asc */
1415 arr[3] = sbuff[13]; /* ascq */
1416 len = 8;
1417 } else {
1418 memset(arr, 0, 18);
1419 arr[0] = 0x70;
1420 arr[2] = sbuff[1];
1421 arr[7] = 0xa;
1422 arr[12] = sbuff[1];
1423 arr[13] = sbuff[3];
1424 }
1425
1426 }
1427 mk_sense_buffer(scp, 0, NO_ADDITIONAL_SENSE, 0);
1428 return fill_from_dev_buffer(scp, arr, len);
1429 }
1430
1431 static int resp_start_stop(struct scsi_cmnd * scp,
1432 struct sdebug_dev_info * devip)
1433 {
1434 unsigned char *cmd = scp->cmnd;
1435 int power_cond, start;
1436
1437 power_cond = (cmd[4] & 0xf0) >> 4;
1438 if (power_cond) {
1439 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 4, 7);
1440 return check_condition_result;
1441 }
1442 start = cmd[4] & 1;
1443 if (start == devip->stopped)
1444 devip->stopped = !start;
1445 return 0;
1446 }
1447
1448 static sector_t get_sdebug_capacity(void)
1449 {
1450 if (scsi_debug_virtual_gb > 0)
1451 return (sector_t)scsi_debug_virtual_gb *
1452 (1073741824 / scsi_debug_sector_size);
1453 else
1454 return sdebug_store_sectors;
1455 }
1456
1457 #define SDEBUG_READCAP_ARR_SZ 8
1458 static int resp_readcap(struct scsi_cmnd * scp,
1459 struct sdebug_dev_info * devip)
1460 {
1461 unsigned char arr[SDEBUG_READCAP_ARR_SZ];
1462 unsigned int capac;
1463
1464 /* following just in case virtual_gb changed */
1465 sdebug_capacity = get_sdebug_capacity();
1466 memset(arr, 0, SDEBUG_READCAP_ARR_SZ);
1467 if (sdebug_capacity < 0xffffffff) {
1468 capac = (unsigned int)sdebug_capacity - 1;
1469 arr[0] = (capac >> 24);
1470 arr[1] = (capac >> 16) & 0xff;
1471 arr[2] = (capac >> 8) & 0xff;
1472 arr[3] = capac & 0xff;
1473 } else {
1474 arr[0] = 0xff;
1475 arr[1] = 0xff;
1476 arr[2] = 0xff;
1477 arr[3] = 0xff;
1478 }
1479 arr[6] = (scsi_debug_sector_size >> 8) & 0xff;
1480 arr[7] = scsi_debug_sector_size & 0xff;
1481 return fill_from_dev_buffer(scp, arr, SDEBUG_READCAP_ARR_SZ);
1482 }
1483
1484 #define SDEBUG_READCAP16_ARR_SZ 32
1485 static int resp_readcap16(struct scsi_cmnd * scp,
1486 struct sdebug_dev_info * devip)
1487 {
1488 unsigned char *cmd = scp->cmnd;
1489 unsigned char arr[SDEBUG_READCAP16_ARR_SZ];
1490 unsigned long long capac;
1491 int k, alloc_len;
1492
1493 alloc_len = ((cmd[10] << 24) + (cmd[11] << 16) + (cmd[12] << 8)
1494 + cmd[13]);
1495 /* following just in case virtual_gb changed */
1496 sdebug_capacity = get_sdebug_capacity();
1497 memset(arr, 0, SDEBUG_READCAP16_ARR_SZ);
1498 capac = sdebug_capacity - 1;
1499 for (k = 0; k < 8; ++k, capac >>= 8)
1500 arr[7 - k] = capac & 0xff;
1501 arr[8] = (scsi_debug_sector_size >> 24) & 0xff;
1502 arr[9] = (scsi_debug_sector_size >> 16) & 0xff;
1503 arr[10] = (scsi_debug_sector_size >> 8) & 0xff;
1504 arr[11] = scsi_debug_sector_size & 0xff;
1505 arr[13] = scsi_debug_physblk_exp & 0xf;
1506 arr[14] = (scsi_debug_lowest_aligned >> 8) & 0x3f;
1507
1508 if (scsi_debug_lbp()) {
1509 arr[14] |= 0x80; /* LBPME */
1510 if (scsi_debug_lbprz)
1511 arr[14] |= 0x40; /* LBPRZ */
1512 }
1513
1514 arr[15] = scsi_debug_lowest_aligned & 0xff;
1515
1516 if (scsi_debug_dif) {
1517 arr[12] = (scsi_debug_dif - 1) << 1; /* P_TYPE */
1518 arr[12] |= 1; /* PROT_EN */
1519 }
1520
1521 return fill_from_dev_buffer(scp, arr,
1522 min(alloc_len, SDEBUG_READCAP16_ARR_SZ));
1523 }
1524
1525 #define SDEBUG_MAX_TGTPGS_ARR_SZ 1412
1526
1527 static int resp_report_tgtpgs(struct scsi_cmnd * scp,
1528 struct sdebug_dev_info * devip)
1529 {
1530 unsigned char *cmd = scp->cmnd;
1531 unsigned char * arr;
1532 int host_no = devip->sdbg_host->shost->host_no;
1533 int n, ret, alen, rlen;
1534 int port_group_a, port_group_b, port_a, port_b;
1535
1536 alen = ((cmd[6] << 24) + (cmd[7] << 16) + (cmd[8] << 8)
1537 + cmd[9]);
1538
1539 arr = kzalloc(SDEBUG_MAX_TGTPGS_ARR_SZ, GFP_ATOMIC);
1540 if (! arr)
1541 return DID_REQUEUE << 16;
1542 /*
1543 * EVPD page 0x88 states we have two ports, one
1544 * real and a fake port with no device connected.
1545 * So we create two port groups with one port each
1546 * and set the group with port B to unavailable.
1547 */
1548 port_a = 0x1; /* relative port A */
1549 port_b = 0x2; /* relative port B */
1550 port_group_a = (((host_no + 1) & 0x7f) << 8) +
1551 (devip->channel & 0x7f);
1552 port_group_b = (((host_no + 1) & 0x7f) << 8) +
1553 (devip->channel & 0x7f) + 0x80;
1554
1555 /*
1556 * The asymmetric access state is cycled according to the host_id.
1557 */
1558 n = 4;
1559 if (0 == scsi_debug_vpd_use_hostno) {
1560 arr[n++] = host_no % 3; /* Asymm access state */
1561 arr[n++] = 0x0F; /* claim: all states are supported */
1562 } else {
1563 arr[n++] = 0x0; /* Active/Optimized path */
1564 arr[n++] = 0x01; /* claim: only support active/optimized paths */
1565 }
1566 arr[n++] = (port_group_a >> 8) & 0xff;
1567 arr[n++] = port_group_a & 0xff;
1568 arr[n++] = 0; /* Reserved */
1569 arr[n++] = 0; /* Status code */
1570 arr[n++] = 0; /* Vendor unique */
1571 arr[n++] = 0x1; /* One port per group */
1572 arr[n++] = 0; /* Reserved */
1573 arr[n++] = 0; /* Reserved */
1574 arr[n++] = (port_a >> 8) & 0xff;
1575 arr[n++] = port_a & 0xff;
1576 arr[n++] = 3; /* Port unavailable */
1577 arr[n++] = 0x08; /* claim: only unavailalbe paths are supported */
1578 arr[n++] = (port_group_b >> 8) & 0xff;
1579 arr[n++] = port_group_b & 0xff;
1580 arr[n++] = 0; /* Reserved */
1581 arr[n++] = 0; /* Status code */
1582 arr[n++] = 0; /* Vendor unique */
1583 arr[n++] = 0x1; /* One port per group */
1584 arr[n++] = 0; /* Reserved */
1585 arr[n++] = 0; /* Reserved */
1586 arr[n++] = (port_b >> 8) & 0xff;
1587 arr[n++] = port_b & 0xff;
1588
1589 rlen = n - 4;
1590 arr[0] = (rlen >> 24) & 0xff;
1591 arr[1] = (rlen >> 16) & 0xff;
1592 arr[2] = (rlen >> 8) & 0xff;
1593 arr[3] = rlen & 0xff;
1594
1595 /*
1596 * Return the smallest value of either
1597 * - The allocated length
1598 * - The constructed command length
1599 * - The maximum array size
1600 */
1601 rlen = min(alen,n);
1602 ret = fill_from_dev_buffer(scp, arr,
1603 min(rlen, SDEBUG_MAX_TGTPGS_ARR_SZ));
1604 kfree(arr);
1605 return ret;
1606 }
1607
1608 static int
1609 resp_rsup_opcodes(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
1610 {
1611 bool rctd;
1612 u8 reporting_opts, req_opcode, sdeb_i, supp;
1613 u16 req_sa, u;
1614 u32 alloc_len, a_len;
1615 int k, offset, len, errsts, count, bump, na;
1616 const struct opcode_info_t *oip;
1617 const struct opcode_info_t *r_oip;
1618 u8 *arr;
1619 u8 *cmd = scp->cmnd;
1620
1621 rctd = !!(cmd[2] & 0x80);
1622 reporting_opts = cmd[2] & 0x7;
1623 req_opcode = cmd[3];
1624 req_sa = get_unaligned_be16(cmd + 4);
1625 alloc_len = get_unaligned_be32(cmd + 6);
1626 if (alloc_len < 4 && alloc_len > 0xffff) {
1627 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 6, -1);
1628 return check_condition_result;
1629 }
1630 if (alloc_len > 8192)
1631 a_len = 8192;
1632 else
1633 a_len = alloc_len;
1634 arr = kzalloc((a_len < 256) ? 320 : a_len + 64, GFP_ATOMIC);
1635 if (NULL == arr) {
1636 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
1637 INSUFF_RES_ASCQ);
1638 return check_condition_result;
1639 }
1640 switch (reporting_opts) {
1641 case 0: /* all commands */
1642 /* count number of commands */
1643 for (count = 0, oip = opcode_info_arr;
1644 oip->num_attached != 0xff; ++oip) {
1645 if (F_INV_OP & oip->flags)
1646 continue;
1647 count += (oip->num_attached + 1);
1648 }
1649 bump = rctd ? 20 : 8;
1650 put_unaligned_be32(count * bump, arr);
1651 for (offset = 4, oip = opcode_info_arr;
1652 oip->num_attached != 0xff && offset < a_len; ++oip) {
1653 if (F_INV_OP & oip->flags)
1654 continue;
1655 na = oip->num_attached;
1656 arr[offset] = oip->opcode;
1657 put_unaligned_be16(oip->sa, arr + offset + 2);
1658 if (rctd)
1659 arr[offset + 5] |= 0x2;
1660 if (FF_SA & oip->flags)
1661 arr[offset + 5] |= 0x1;
1662 put_unaligned_be16(oip->len_mask[0], arr + offset + 6);
1663 if (rctd)
1664 put_unaligned_be16(0xa, arr + offset + 8);
1665 r_oip = oip;
1666 for (k = 0, oip = oip->arrp; k < na; ++k, ++oip) {
1667 if (F_INV_OP & oip->flags)
1668 continue;
1669 offset += bump;
1670 arr[offset] = oip->opcode;
1671 put_unaligned_be16(oip->sa, arr + offset + 2);
1672 if (rctd)
1673 arr[offset + 5] |= 0x2;
1674 if (FF_SA & oip->flags)
1675 arr[offset + 5] |= 0x1;
1676 put_unaligned_be16(oip->len_mask[0],
1677 arr + offset + 6);
1678 if (rctd)
1679 put_unaligned_be16(0xa,
1680 arr + offset + 8);
1681 }
1682 oip = r_oip;
1683 offset += bump;
1684 }
1685 break;
1686 case 1: /* one command: opcode only */
1687 case 2: /* one command: opcode plus service action */
1688 case 3: /* one command: if sa==0 then opcode only else opcode+sa */
1689 sdeb_i = opcode_ind_arr[req_opcode];
1690 oip = &opcode_info_arr[sdeb_i];
1691 if (F_INV_OP & oip->flags) {
1692 supp = 1;
1693 offset = 4;
1694 } else {
1695 if (1 == reporting_opts) {
1696 if (FF_SA & oip->flags) {
1697 mk_sense_invalid_fld(scp, SDEB_IN_CDB,
1698 2, 2);
1699 kfree(arr);
1700 return check_condition_result;
1701 }
1702 req_sa = 0;
1703 } else if (2 == reporting_opts &&
1704 0 == (FF_SA & oip->flags)) {
1705 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 4, -1);
1706 kfree(arr); /* point at requested sa */
1707 return check_condition_result;
1708 }
1709 if (0 == (FF_SA & oip->flags) &&
1710 req_opcode == oip->opcode)
1711 supp = 3;
1712 else if (0 == (FF_SA & oip->flags)) {
1713 na = oip->num_attached;
1714 for (k = 0, oip = oip->arrp; k < na;
1715 ++k, ++oip) {
1716 if (req_opcode == oip->opcode)
1717 break;
1718 }
1719 supp = (k >= na) ? 1 : 3;
1720 } else if (req_sa != oip->sa) {
1721 na = oip->num_attached;
1722 for (k = 0, oip = oip->arrp; k < na;
1723 ++k, ++oip) {
1724 if (req_sa == oip->sa)
1725 break;
1726 }
1727 supp = (k >= na) ? 1 : 3;
1728 } else
1729 supp = 3;
1730 if (3 == supp) {
1731 u = oip->len_mask[0];
1732 put_unaligned_be16(u, arr + 2);
1733 arr[4] = oip->opcode;
1734 for (k = 1; k < u; ++k)
1735 arr[4 + k] = (k < 16) ?
1736 oip->len_mask[k] : 0xff;
1737 offset = 4 + u;
1738 } else
1739 offset = 4;
1740 }
1741 arr[1] = (rctd ? 0x80 : 0) | supp;
1742 if (rctd) {
1743 put_unaligned_be16(0xa, arr + offset);
1744 offset += 12;
1745 }
1746 break;
1747 default:
1748 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 2);
1749 kfree(arr);
1750 return check_condition_result;
1751 }
1752 offset = (offset < a_len) ? offset : a_len;
1753 len = (offset < alloc_len) ? offset : alloc_len;
1754 errsts = fill_from_dev_buffer(scp, arr, len);
1755 kfree(arr);
1756 return errsts;
1757 }
1758
1759 static int
1760 resp_rsup_tmfs(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
1761 {
1762 bool repd;
1763 u32 alloc_len, len;
1764 u8 arr[16];
1765 u8 *cmd = scp->cmnd;
1766
1767 memset(arr, 0, sizeof(arr));
1768 repd = !!(cmd[2] & 0x80);
1769 alloc_len = get_unaligned_be32(cmd + 6);
1770 if (alloc_len < 4) {
1771 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 6, -1);
1772 return check_condition_result;
1773 }
1774 arr[0] = 0xc8; /* ATS | ATSS | LURS */
1775 arr[1] = 0x1; /* ITNRS */
1776 if (repd) {
1777 arr[3] = 0xc;
1778 len = 16;
1779 } else
1780 len = 4;
1781
1782 len = (len < alloc_len) ? len : alloc_len;
1783 return fill_from_dev_buffer(scp, arr, len);
1784 }
1785
1786 /* <<Following mode page info copied from ST318451LW>> */
1787
1788 static int resp_err_recov_pg(unsigned char * p, int pcontrol, int target)
1789 { /* Read-Write Error Recovery page for mode_sense */
1790 unsigned char err_recov_pg[] = {0x1, 0xa, 0xc0, 11, 240, 0, 0, 0,
1791 5, 0, 0xff, 0xff};
1792
1793 memcpy(p, err_recov_pg, sizeof(err_recov_pg));
1794 if (1 == pcontrol)
1795 memset(p + 2, 0, sizeof(err_recov_pg) - 2);
1796 return sizeof(err_recov_pg);
1797 }
1798
1799 static int resp_disconnect_pg(unsigned char * p, int pcontrol, int target)
1800 { /* Disconnect-Reconnect page for mode_sense */
1801 unsigned char disconnect_pg[] = {0x2, 0xe, 128, 128, 0, 10, 0, 0,
1802 0, 0, 0, 0, 0, 0, 0, 0};
1803
1804 memcpy(p, disconnect_pg, sizeof(disconnect_pg));
1805 if (1 == pcontrol)
1806 memset(p + 2, 0, sizeof(disconnect_pg) - 2);
1807 return sizeof(disconnect_pg);
1808 }
1809
1810 static int resp_format_pg(unsigned char * p, int pcontrol, int target)
1811 { /* Format device page for mode_sense */
1812 unsigned char format_pg[] = {0x3, 0x16, 0, 0, 0, 0, 0, 0,
1813 0, 0, 0, 0, 0, 0, 0, 0,
1814 0, 0, 0, 0, 0x40, 0, 0, 0};
1815
1816 memcpy(p, format_pg, sizeof(format_pg));
1817 p[10] = (sdebug_sectors_per >> 8) & 0xff;
1818 p[11] = sdebug_sectors_per & 0xff;
1819 p[12] = (scsi_debug_sector_size >> 8) & 0xff;
1820 p[13] = scsi_debug_sector_size & 0xff;
1821 if (scsi_debug_removable)
1822 p[20] |= 0x20; /* should agree with INQUIRY */
1823 if (1 == pcontrol)
1824 memset(p + 2, 0, sizeof(format_pg) - 2);
1825 return sizeof(format_pg);
1826 }
1827
1828 static int resp_caching_pg(unsigned char * p, int pcontrol, int target)
1829 { /* Caching page for mode_sense */
1830 unsigned char ch_caching_pg[] = {/* 0x8, 18, */ 0x4, 0, 0, 0, 0, 0,
1831 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
1832 unsigned char d_caching_pg[] = {0x8, 18, 0x14, 0, 0xff, 0xff, 0, 0,
1833 0xff, 0xff, 0xff, 0xff, 0x80, 0x14, 0, 0, 0, 0, 0, 0};
1834
1835 if (SCSI_DEBUG_OPT_N_WCE & scsi_debug_opts)
1836 caching_pg[2] &= ~0x4; /* set WCE=0 (default WCE=1) */
1837 memcpy(p, caching_pg, sizeof(caching_pg));
1838 if (1 == pcontrol)
1839 memcpy(p + 2, ch_caching_pg, sizeof(ch_caching_pg));
1840 else if (2 == pcontrol)
1841 memcpy(p, d_caching_pg, sizeof(d_caching_pg));
1842 return sizeof(caching_pg);
1843 }
1844
1845 static int resp_ctrl_m_pg(unsigned char * p, int pcontrol, int target)
1846 { /* Control mode page for mode_sense */
1847 unsigned char ch_ctrl_m_pg[] = {/* 0xa, 10, */ 0x6, 0, 0, 0, 0, 0,
1848 0, 0, 0, 0};
1849 unsigned char d_ctrl_m_pg[] = {0xa, 10, 2, 0, 0, 0, 0, 0,
1850 0, 0, 0x2, 0x4b};
1851
1852 if (scsi_debug_dsense)
1853 ctrl_m_pg[2] |= 0x4;
1854 else
1855 ctrl_m_pg[2] &= ~0x4;
1856
1857 if (scsi_debug_ato)
1858 ctrl_m_pg[5] |= 0x80; /* ATO=1 */
1859
1860 memcpy(p, ctrl_m_pg, sizeof(ctrl_m_pg));
1861 if (1 == pcontrol)
1862 memcpy(p + 2, ch_ctrl_m_pg, sizeof(ch_ctrl_m_pg));
1863 else if (2 == pcontrol)
1864 memcpy(p, d_ctrl_m_pg, sizeof(d_ctrl_m_pg));
1865 return sizeof(ctrl_m_pg);
1866 }
1867
1868
1869 static int resp_iec_m_pg(unsigned char * p, int pcontrol, int target)
1870 { /* Informational Exceptions control mode page for mode_sense */
1871 unsigned char ch_iec_m_pg[] = {/* 0x1c, 0xa, */ 0x4, 0xf, 0, 0, 0, 0,
1872 0, 0, 0x0, 0x0};
1873 unsigned char d_iec_m_pg[] = {0x1c, 0xa, 0x08, 0, 0, 0, 0, 0,
1874 0, 0, 0x0, 0x0};
1875
1876 memcpy(p, iec_m_pg, sizeof(iec_m_pg));
1877 if (1 == pcontrol)
1878 memcpy(p + 2, ch_iec_m_pg, sizeof(ch_iec_m_pg));
1879 else if (2 == pcontrol)
1880 memcpy(p, d_iec_m_pg, sizeof(d_iec_m_pg));
1881 return sizeof(iec_m_pg);
1882 }
1883
1884 static int resp_sas_sf_m_pg(unsigned char * p, int pcontrol, int target)
1885 { /* SAS SSP mode page - short format for mode_sense */
1886 unsigned char sas_sf_m_pg[] = {0x19, 0x6,
1887 0x6, 0x0, 0x7, 0xd0, 0x0, 0x0};
1888
1889 memcpy(p, sas_sf_m_pg, sizeof(sas_sf_m_pg));
1890 if (1 == pcontrol)
1891 memset(p + 2, 0, sizeof(sas_sf_m_pg) - 2);
1892 return sizeof(sas_sf_m_pg);
1893 }
1894
1895
1896 static int resp_sas_pcd_m_spg(unsigned char * p, int pcontrol, int target,
1897 int target_dev_id)
1898 { /* SAS phy control and discover mode page for mode_sense */
1899 unsigned char sas_pcd_m_pg[] = {0x59, 0x1, 0, 0x64, 0, 0x6, 0, 2,
1900 0, 0, 0, 0, 0x10, 0x9, 0x8, 0x0,
1901 0x52, 0x22, 0x22, 0x20, 0x0, 0x0, 0x0, 0x0,
1902 0x51, 0x11, 0x11, 0x10, 0x0, 0x0, 0x0, 0x1,
1903 0x2, 0, 0, 0, 0, 0, 0, 0,
1904 0x88, 0x99, 0, 0, 0, 0, 0, 0,
1905 0, 0, 0, 0, 0, 0, 0, 0,
1906 0, 1, 0, 0, 0x10, 0x9, 0x8, 0x0,
1907 0x52, 0x22, 0x22, 0x20, 0x0, 0x0, 0x0, 0x0,
1908 0x51, 0x11, 0x11, 0x10, 0x0, 0x0, 0x0, 0x1,
1909 0x3, 0, 0, 0, 0, 0, 0, 0,
1910 0x88, 0x99, 0, 0, 0, 0, 0, 0,
1911 0, 0, 0, 0, 0, 0, 0, 0,
1912 };
1913 int port_a, port_b;
1914
1915 port_a = target_dev_id + 1;
1916 port_b = port_a + 1;
1917 memcpy(p, sas_pcd_m_pg, sizeof(sas_pcd_m_pg));
1918 p[20] = (port_a >> 24);
1919 p[21] = (port_a >> 16) & 0xff;
1920 p[22] = (port_a >> 8) & 0xff;
1921 p[23] = port_a & 0xff;
1922 p[48 + 20] = (port_b >> 24);
1923 p[48 + 21] = (port_b >> 16) & 0xff;
1924 p[48 + 22] = (port_b >> 8) & 0xff;
1925 p[48 + 23] = port_b & 0xff;
1926 if (1 == pcontrol)
1927 memset(p + 4, 0, sizeof(sas_pcd_m_pg) - 4);
1928 return sizeof(sas_pcd_m_pg);
1929 }
1930
1931 static int resp_sas_sha_m_spg(unsigned char * p, int pcontrol)
1932 { /* SAS SSP shared protocol specific port mode subpage */
1933 unsigned char sas_sha_m_pg[] = {0x59, 0x2, 0, 0xc, 0, 0x6, 0x10, 0,
1934 0, 0, 0, 0, 0, 0, 0, 0,
1935 };
1936
1937 memcpy(p, sas_sha_m_pg, sizeof(sas_sha_m_pg));
1938 if (1 == pcontrol)
1939 memset(p + 4, 0, sizeof(sas_sha_m_pg) - 4);
1940 return sizeof(sas_sha_m_pg);
1941 }
1942
1943 #define SDEBUG_MAX_MSENSE_SZ 256
1944
1945 static int
1946 resp_mode_sense(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
1947 {
1948 unsigned char dbd, llbaa;
1949 int pcontrol, pcode, subpcode, bd_len;
1950 unsigned char dev_spec;
1951 int k, alloc_len, msense_6, offset, len, target_dev_id;
1952 int target = scp->device->id;
1953 unsigned char * ap;
1954 unsigned char arr[SDEBUG_MAX_MSENSE_SZ];
1955 unsigned char *cmd = scp->cmnd;
1956
1957 dbd = !!(cmd[1] & 0x8);
1958 pcontrol = (cmd[2] & 0xc0) >> 6;
1959 pcode = cmd[2] & 0x3f;
1960 subpcode = cmd[3];
1961 msense_6 = (MODE_SENSE == cmd[0]);
1962 llbaa = msense_6 ? 0 : !!(cmd[1] & 0x10);
1963 if ((0 == scsi_debug_ptype) && (0 == dbd))
1964 bd_len = llbaa ? 16 : 8;
1965 else
1966 bd_len = 0;
1967 alloc_len = msense_6 ? cmd[4] : ((cmd[7] << 8) | cmd[8]);
1968 memset(arr, 0, SDEBUG_MAX_MSENSE_SZ);
1969 if (0x3 == pcontrol) { /* Saving values not supported */
1970 mk_sense_buffer(scp, ILLEGAL_REQUEST, SAVING_PARAMS_UNSUP, 0);
1971 return check_condition_result;
1972 }
1973 target_dev_id = ((devip->sdbg_host->shost->host_no + 1) * 2000) +
1974 (devip->target * 1000) - 3;
1975 /* set DPOFUA bit for disks */
1976 if (0 == scsi_debug_ptype)
1977 dev_spec = (DEV_READONLY(target) ? 0x80 : 0x0) | 0x10;
1978 else
1979 dev_spec = 0x0;
1980 if (msense_6) {
1981 arr[2] = dev_spec;
1982 arr[3] = bd_len;
1983 offset = 4;
1984 } else {
1985 arr[3] = dev_spec;
1986 if (16 == bd_len)
1987 arr[4] = 0x1; /* set LONGLBA bit */
1988 arr[7] = bd_len; /* assume 255 or less */
1989 offset = 8;
1990 }
1991 ap = arr + offset;
1992 if ((bd_len > 0) && (!sdebug_capacity))
1993 sdebug_capacity = get_sdebug_capacity();
1994
1995 if (8 == bd_len) {
1996 if (sdebug_capacity > 0xfffffffe) {
1997 ap[0] = 0xff;
1998 ap[1] = 0xff;
1999 ap[2] = 0xff;
2000 ap[3] = 0xff;
2001 } else {
2002 ap[0] = (sdebug_capacity >> 24) & 0xff;
2003 ap[1] = (sdebug_capacity >> 16) & 0xff;
2004 ap[2] = (sdebug_capacity >> 8) & 0xff;
2005 ap[3] = sdebug_capacity & 0xff;
2006 }
2007 ap[6] = (scsi_debug_sector_size >> 8) & 0xff;
2008 ap[7] = scsi_debug_sector_size & 0xff;
2009 offset += bd_len;
2010 ap = arr + offset;
2011 } else if (16 == bd_len) {
2012 unsigned long long capac = sdebug_capacity;
2013
2014 for (k = 0; k < 8; ++k, capac >>= 8)
2015 ap[7 - k] = capac & 0xff;
2016 ap[12] = (scsi_debug_sector_size >> 24) & 0xff;
2017 ap[13] = (scsi_debug_sector_size >> 16) & 0xff;
2018 ap[14] = (scsi_debug_sector_size >> 8) & 0xff;
2019 ap[15] = scsi_debug_sector_size & 0xff;
2020 offset += bd_len;
2021 ap = arr + offset;
2022 }
2023
2024 if ((subpcode > 0x0) && (subpcode < 0xff) && (0x19 != pcode)) {
2025 /* TODO: Control Extension page */
2026 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1);
2027 return check_condition_result;
2028 }
2029 switch (pcode) {
2030 case 0x1: /* Read-Write error recovery page, direct access */
2031 len = resp_err_recov_pg(ap, pcontrol, target);
2032 offset += len;
2033 break;
2034 case 0x2: /* Disconnect-Reconnect page, all devices */
2035 len = resp_disconnect_pg(ap, pcontrol, target);
2036 offset += len;
2037 break;
2038 case 0x3: /* Format device page, direct access */
2039 len = resp_format_pg(ap, pcontrol, target);
2040 offset += len;
2041 break;
2042 case 0x8: /* Caching page, direct access */
2043 len = resp_caching_pg(ap, pcontrol, target);
2044 offset += len;
2045 break;
2046 case 0xa: /* Control Mode page, all devices */
2047 len = resp_ctrl_m_pg(ap, pcontrol, target);
2048 offset += len;
2049 break;
2050 case 0x19: /* if spc==1 then sas phy, control+discover */
2051 if ((subpcode > 0x2) && (subpcode < 0xff)) {
2052 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1);
2053 return check_condition_result;
2054 }
2055 len = 0;
2056 if ((0x0 == subpcode) || (0xff == subpcode))
2057 len += resp_sas_sf_m_pg(ap + len, pcontrol, target);
2058 if ((0x1 == subpcode) || (0xff == subpcode))
2059 len += resp_sas_pcd_m_spg(ap + len, pcontrol, target,
2060 target_dev_id);
2061 if ((0x2 == subpcode) || (0xff == subpcode))
2062 len += resp_sas_sha_m_spg(ap + len, pcontrol);
2063 offset += len;
2064 break;
2065 case 0x1c: /* Informational Exceptions Mode page, all devices */
2066 len = resp_iec_m_pg(ap, pcontrol, target);
2067 offset += len;
2068 break;
2069 case 0x3f: /* Read all Mode pages */
2070 if ((0 == subpcode) || (0xff == subpcode)) {
2071 len = resp_err_recov_pg(ap, pcontrol, target);
2072 len += resp_disconnect_pg(ap + len, pcontrol, target);
2073 len += resp_format_pg(ap + len, pcontrol, target);
2074 len += resp_caching_pg(ap + len, pcontrol, target);
2075 len += resp_ctrl_m_pg(ap + len, pcontrol, target);
2076 len += resp_sas_sf_m_pg(ap + len, pcontrol, target);
2077 if (0xff == subpcode) {
2078 len += resp_sas_pcd_m_spg(ap + len, pcontrol,
2079 target, target_dev_id);
2080 len += resp_sas_sha_m_spg(ap + len, pcontrol);
2081 }
2082 len += resp_iec_m_pg(ap + len, pcontrol, target);
2083 } else {
2084 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1);
2085 return check_condition_result;
2086 }
2087 offset += len;
2088 break;
2089 default:
2090 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 5);
2091 return check_condition_result;
2092 }
2093 if (msense_6)
2094 arr[0] = offset - 1;
2095 else {
2096 arr[0] = ((offset - 2) >> 8) & 0xff;
2097 arr[1] = (offset - 2) & 0xff;
2098 }
2099 return fill_from_dev_buffer(scp, arr, min(alloc_len, offset));
2100 }
2101
2102 #define SDEBUG_MAX_MSELECT_SZ 512
2103
2104 static int
2105 resp_mode_select(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
2106 {
2107 int pf, sp, ps, md_len, bd_len, off, spf, pg_len;
2108 int param_len, res, mpage;
2109 unsigned char arr[SDEBUG_MAX_MSELECT_SZ];
2110 unsigned char *cmd = scp->cmnd;
2111 int mselect6 = (MODE_SELECT == cmd[0]);
2112
2113 memset(arr, 0, sizeof(arr));
2114 pf = cmd[1] & 0x10;
2115 sp = cmd[1] & 0x1;
2116 param_len = mselect6 ? cmd[4] : ((cmd[7] << 8) + cmd[8]);
2117 if ((0 == pf) || sp || (param_len > SDEBUG_MAX_MSELECT_SZ)) {
2118 mk_sense_invalid_fld(scp, SDEB_IN_CDB, mselect6 ? 4 : 7, -1);
2119 return check_condition_result;
2120 }
2121 res = fetch_to_dev_buffer(scp, arr, param_len);
2122 if (-1 == res)
2123 return (DID_ERROR << 16);
2124 else if ((res < param_len) &&
2125 (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts))
2126 sdev_printk(KERN_INFO, scp->device,
2127 "%s: cdb indicated=%d, IO sent=%d bytes\n",
2128 __func__, param_len, res);
2129 md_len = mselect6 ? (arr[0] + 1) : ((arr[0] << 8) + arr[1] + 2);
2130 bd_len = mselect6 ? arr[3] : ((arr[6] << 8) + arr[7]);
2131 if (md_len > 2) {
2132 mk_sense_invalid_fld(scp, SDEB_IN_DATA, 0, -1);
2133 return check_condition_result;
2134 }
2135 off = bd_len + (mselect6 ? 4 : 8);
2136 mpage = arr[off] & 0x3f;
2137 ps = !!(arr[off] & 0x80);
2138 if (ps) {
2139 mk_sense_invalid_fld(scp, SDEB_IN_DATA, off, 7);
2140 return check_condition_result;
2141 }
2142 spf = !!(arr[off] & 0x40);
2143 pg_len = spf ? ((arr[off + 2] << 8) + arr[off + 3] + 4) :
2144 (arr[off + 1] + 2);
2145 if ((pg_len + off) > param_len) {
2146 mk_sense_buffer(scp, ILLEGAL_REQUEST,
2147 PARAMETER_LIST_LENGTH_ERR, 0);
2148 return check_condition_result;
2149 }
2150 switch (mpage) {
2151 case 0x8: /* Caching Mode page */
2152 if (caching_pg[1] == arr[off + 1]) {
2153 memcpy(caching_pg + 2, arr + off + 2,
2154 sizeof(caching_pg) - 2);
2155 goto set_mode_changed_ua;
2156 }
2157 break;
2158 case 0xa: /* Control Mode page */
2159 if (ctrl_m_pg[1] == arr[off + 1]) {
2160 memcpy(ctrl_m_pg + 2, arr + off + 2,
2161 sizeof(ctrl_m_pg) - 2);
2162 scsi_debug_dsense = !!(ctrl_m_pg[2] & 0x4);
2163 goto set_mode_changed_ua;
2164 }
2165 break;
2166 case 0x1c: /* Informational Exceptions Mode page */
2167 if (iec_m_pg[1] == arr[off + 1]) {
2168 memcpy(iec_m_pg + 2, arr + off + 2,
2169 sizeof(iec_m_pg) - 2);
2170 goto set_mode_changed_ua;
2171 }
2172 break;
2173 default:
2174 break;
2175 }
2176 mk_sense_invalid_fld(scp, SDEB_IN_DATA, off, 5);
2177 return check_condition_result;
2178 set_mode_changed_ua:
2179 set_bit(SDEBUG_UA_MODE_CHANGED, devip->uas_bm);
2180 return 0;
2181 }
2182
2183 static int resp_temp_l_pg(unsigned char * arr)
2184 {
2185 unsigned char temp_l_pg[] = {0x0, 0x0, 0x3, 0x2, 0x0, 38,
2186 0x0, 0x1, 0x3, 0x2, 0x0, 65,
2187 };
2188
2189 memcpy(arr, temp_l_pg, sizeof(temp_l_pg));
2190 return sizeof(temp_l_pg);
2191 }
2192
2193 static int resp_ie_l_pg(unsigned char * arr)
2194 {
2195 unsigned char ie_l_pg[] = {0x0, 0x0, 0x3, 0x3, 0x0, 0x0, 38,
2196 };
2197
2198 memcpy(arr, ie_l_pg, sizeof(ie_l_pg));
2199 if (iec_m_pg[2] & 0x4) { /* TEST bit set */
2200 arr[4] = THRESHOLD_EXCEEDED;
2201 arr[5] = 0xff;
2202 }
2203 return sizeof(ie_l_pg);
2204 }
2205
2206 #define SDEBUG_MAX_LSENSE_SZ 512
2207
2208 static int resp_log_sense(struct scsi_cmnd * scp,
2209 struct sdebug_dev_info * devip)
2210 {
2211 int ppc, sp, pcontrol, pcode, subpcode, alloc_len, len, n;
2212 unsigned char arr[SDEBUG_MAX_LSENSE_SZ];
2213 unsigned char *cmd = scp->cmnd;
2214
2215 memset(arr, 0, sizeof(arr));
2216 ppc = cmd[1] & 0x2;
2217 sp = cmd[1] & 0x1;
2218 if (ppc || sp) {
2219 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, ppc ? 1 : 0);
2220 return check_condition_result;
2221 }
2222 pcontrol = (cmd[2] & 0xc0) >> 6;
2223 pcode = cmd[2] & 0x3f;
2224 subpcode = cmd[3] & 0xff;
2225 alloc_len = (cmd[7] << 8) + cmd[8];
2226 arr[0] = pcode;
2227 if (0 == subpcode) {
2228 switch (pcode) {
2229 case 0x0: /* Supported log pages log page */
2230 n = 4;
2231 arr[n++] = 0x0; /* this page */
2232 arr[n++] = 0xd; /* Temperature */
2233 arr[n++] = 0x2f; /* Informational exceptions */
2234 arr[3] = n - 4;
2235 break;
2236 case 0xd: /* Temperature log page */
2237 arr[3] = resp_temp_l_pg(arr + 4);
2238 break;
2239 case 0x2f: /* Informational exceptions log page */
2240 arr[3] = resp_ie_l_pg(arr + 4);
2241 break;
2242 default:
2243 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 5);
2244 return check_condition_result;
2245 }
2246 } else if (0xff == subpcode) {
2247 arr[0] |= 0x40;
2248 arr[1] = subpcode;
2249 switch (pcode) {
2250 case 0x0: /* Supported log pages and subpages log page */
2251 n = 4;
2252 arr[n++] = 0x0;
2253 arr[n++] = 0x0; /* 0,0 page */
2254 arr[n++] = 0x0;
2255 arr[n++] = 0xff; /* this page */
2256 arr[n++] = 0xd;
2257 arr[n++] = 0x0; /* Temperature */
2258 arr[n++] = 0x2f;
2259 arr[n++] = 0x0; /* Informational exceptions */
2260 arr[3] = n - 4;
2261 break;
2262 case 0xd: /* Temperature subpages */
2263 n = 4;
2264 arr[n++] = 0xd;
2265 arr[n++] = 0x0; /* Temperature */
2266 arr[3] = n - 4;
2267 break;
2268 case 0x2f: /* Informational exceptions subpages */
2269 n = 4;
2270 arr[n++] = 0x2f;
2271 arr[n++] = 0x0; /* Informational exceptions */
2272 arr[3] = n - 4;
2273 break;
2274 default:
2275 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 5);
2276 return check_condition_result;
2277 }
2278 } else {
2279 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1);
2280 return check_condition_result;
2281 }
2282 len = min(((arr[2] << 8) + arr[3]) + 4, alloc_len);
2283 return fill_from_dev_buffer(scp, arr,
2284 min(len, SDEBUG_MAX_INQ_ARR_SZ));
2285 }
2286
2287 static int check_device_access_params(struct scsi_cmnd *scp,
2288 unsigned long long lba, unsigned int num)
2289 {
2290 if (lba + num > sdebug_capacity) {
2291 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
2292 return check_condition_result;
2293 }
2294 /* transfer length excessive (tie in to block limits VPD page) */
2295 if (num > sdebug_store_sectors) {
2296 /* needs work to find which cdb byte 'num' comes from */
2297 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
2298 return check_condition_result;
2299 }
2300 return 0;
2301 }
2302
2303 /* Returns number of bytes copied or -1 if error. */
2304 static int
2305 do_device_access(struct scsi_cmnd *scmd, u64 lba, u32 num, bool do_write)
2306 {
2307 int ret;
2308 u64 block, rest = 0;
2309 struct scsi_data_buffer *sdb;
2310 enum dma_data_direction dir;
2311 size_t (*func)(struct scatterlist *, unsigned int, void *, size_t,
2312 off_t);
2313
2314 if (do_write) {
2315 sdb = scsi_out(scmd);
2316 dir = DMA_TO_DEVICE;
2317 func = sg_pcopy_to_buffer;
2318 } else {
2319 sdb = scsi_in(scmd);
2320 dir = DMA_FROM_DEVICE;
2321 func = sg_pcopy_from_buffer;
2322 }
2323
2324 if (!sdb->length)
2325 return 0;
2326 if (!(scsi_bidi_cmnd(scmd) || scmd->sc_data_direction == dir))
2327 return -1;
2328
2329 block = do_div(lba, sdebug_store_sectors);
2330 if (block + num > sdebug_store_sectors)
2331 rest = block + num - sdebug_store_sectors;
2332
2333 ret = func(sdb->table.sgl, sdb->table.nents,
2334 fake_storep + (block * scsi_debug_sector_size),
2335 (num - rest) * scsi_debug_sector_size, 0);
2336 if (ret != (num - rest) * scsi_debug_sector_size)
2337 return ret;
2338
2339 if (rest) {
2340 ret += func(sdb->table.sgl, sdb->table.nents,
2341 fake_storep, rest * scsi_debug_sector_size,
2342 (num - rest) * scsi_debug_sector_size);
2343 }
2344
2345 return ret;
2346 }
2347
2348 /* If fake_store(lba,num) compares equal to arr(num), then copy top half of
2349 * arr into fake_store(lba,num) and return true. If comparison fails then
2350 * return false. */
2351 static bool
2352 comp_write_worker(u64 lba, u32 num, const u8 *arr)
2353 {
2354 bool res;
2355 u64 block, rest = 0;
2356 u32 store_blks = sdebug_store_sectors;
2357 u32 lb_size = scsi_debug_sector_size;
2358
2359 block = do_div(lba, store_blks);
2360 if (block + num > store_blks)
2361 rest = block + num - store_blks;
2362
2363 res = !memcmp(fake_storep + (block * lb_size), arr,
2364 (num - rest) * lb_size);
2365 if (!res)
2366 return res;
2367 if (rest)
2368 res = memcmp(fake_storep, arr + ((num - rest) * lb_size),
2369 rest * lb_size);
2370 if (!res)
2371 return res;
2372 arr += num * lb_size;
2373 memcpy(fake_storep + (block * lb_size), arr, (num - rest) * lb_size);
2374 if (rest)
2375 memcpy(fake_storep, arr + ((num - rest) * lb_size),
2376 rest * lb_size);
2377 return res;
2378 }
2379
2380 static __be16 dif_compute_csum(const void *buf, int len)
2381 {
2382 __be16 csum;
2383
2384 if (scsi_debug_guard)
2385 csum = (__force __be16)ip_compute_csum(buf, len);
2386 else
2387 csum = cpu_to_be16(crc_t10dif(buf, len));
2388
2389 return csum;
2390 }
2391
2392 static int dif_verify(struct sd_dif_tuple *sdt, const void *data,
2393 sector_t sector, u32 ei_lba)
2394 {
2395 __be16 csum = dif_compute_csum(data, scsi_debug_sector_size);
2396
2397 if (sdt->guard_tag != csum) {
2398 pr_err("%s: GUARD check failed on sector %lu rcvd 0x%04x, data 0x%04x\n",
2399 __func__,
2400 (unsigned long)sector,
2401 be16_to_cpu(sdt->guard_tag),
2402 be16_to_cpu(csum));
2403 return 0x01;
2404 }
2405 if (scsi_debug_dif == SD_DIF_TYPE1_PROTECTION &&
2406 be32_to_cpu(sdt->ref_tag) != (sector & 0xffffffff)) {
2407 pr_err("%s: REF check failed on sector %lu\n",
2408 __func__, (unsigned long)sector);
2409 return 0x03;
2410 }
2411 if (scsi_debug_dif == SD_DIF_TYPE2_PROTECTION &&
2412 be32_to_cpu(sdt->ref_tag) != ei_lba) {
2413 pr_err("%s: REF check failed on sector %lu\n",
2414 __func__, (unsigned long)sector);
2415 return 0x03;
2416 }
2417 return 0;
2418 }
2419
2420 static void dif_copy_prot(struct scsi_cmnd *SCpnt, sector_t sector,
2421 unsigned int sectors, bool read)
2422 {
2423 size_t resid;
2424 void *paddr;
2425 const void *dif_store_end = dif_storep + sdebug_store_sectors;
2426 struct sg_mapping_iter miter;
2427
2428 /* Bytes of protection data to copy into sgl */
2429 resid = sectors * sizeof(*dif_storep);
2430
2431 sg_miter_start(&miter, scsi_prot_sglist(SCpnt),
2432 scsi_prot_sg_count(SCpnt), SG_MITER_ATOMIC |
2433 (read ? SG_MITER_TO_SG : SG_MITER_FROM_SG));
2434
2435 while (sg_miter_next(&miter) && resid > 0) {
2436 size_t len = min(miter.length, resid);
2437 void *start = dif_store(sector);
2438 size_t rest = 0;
2439
2440 if (dif_store_end < start + len)
2441 rest = start + len - dif_store_end;
2442
2443 paddr = miter.addr;
2444
2445 if (read)
2446 memcpy(paddr, start, len - rest);
2447 else
2448 memcpy(start, paddr, len - rest);
2449
2450 if (rest) {
2451 if (read)
2452 memcpy(paddr + len - rest, dif_storep, rest);
2453 else
2454 memcpy(dif_storep, paddr + len - rest, rest);
2455 }
2456
2457 sector += len / sizeof(*dif_storep);
2458 resid -= len;
2459 }
2460 sg_miter_stop(&miter);
2461 }
2462
2463 static int prot_verify_read(struct scsi_cmnd *SCpnt, sector_t start_sec,
2464 unsigned int sectors, u32 ei_lba)
2465 {
2466 unsigned int i;
2467 struct sd_dif_tuple *sdt;
2468 sector_t sector;
2469
2470 for (i = 0; i < sectors; i++, ei_lba++) {
2471 int ret;
2472
2473 sector = start_sec + i;
2474 sdt = dif_store(sector);
2475
2476 if (sdt->app_tag == cpu_to_be16(0xffff))
2477 continue;
2478
2479 ret = dif_verify(sdt, fake_store(sector), sector, ei_lba);
2480 if (ret) {
2481 dif_errors++;
2482 return ret;
2483 }
2484 }
2485
2486 dif_copy_prot(SCpnt, start_sec, sectors, true);
2487 dix_reads++;
2488
2489 return 0;
2490 }
2491
2492 static int
2493 resp_read_dt0(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
2494 {
2495 u8 *cmd = scp->cmnd;
2496 u64 lba;
2497 u32 num;
2498 u32 ei_lba;
2499 unsigned long iflags;
2500 int ret;
2501 bool check_prot;
2502
2503 switch (cmd[0]) {
2504 case READ_16:
2505 ei_lba = 0;
2506 lba = get_unaligned_be64(cmd + 2);
2507 num = get_unaligned_be32(cmd + 10);
2508 check_prot = true;
2509 break;
2510 case READ_10:
2511 ei_lba = 0;
2512 lba = get_unaligned_be32(cmd + 2);
2513 num = get_unaligned_be16(cmd + 7);
2514 check_prot = true;
2515 break;
2516 case READ_6:
2517 ei_lba = 0;
2518 lba = (u32)cmd[3] | (u32)cmd[2] << 8 |
2519 (u32)(cmd[1] & 0x1f) << 16;
2520 num = (0 == cmd[4]) ? 256 : cmd[4];
2521 check_prot = true;
2522 break;
2523 case READ_12:
2524 ei_lba = 0;
2525 lba = get_unaligned_be32(cmd + 2);
2526 num = get_unaligned_be32(cmd + 6);
2527 check_prot = true;
2528 break;
2529 case XDWRITEREAD_10:
2530 ei_lba = 0;
2531 lba = get_unaligned_be32(cmd + 2);
2532 num = get_unaligned_be16(cmd + 7);
2533 check_prot = false;
2534 break;
2535 default: /* assume READ(32) */
2536 lba = get_unaligned_be64(cmd + 12);
2537 ei_lba = get_unaligned_be32(cmd + 20);
2538 num = get_unaligned_be32(cmd + 28);
2539 check_prot = false;
2540 break;
2541 }
2542 if (check_prot) {
2543 if (scsi_debug_dif == SD_DIF_TYPE2_PROTECTION &&
2544 (cmd[1] & 0xe0)) {
2545 mk_sense_invalid_opcode(scp);
2546 return check_condition_result;
2547 }
2548 if ((scsi_debug_dif == SD_DIF_TYPE1_PROTECTION ||
2549 scsi_debug_dif == SD_DIF_TYPE3_PROTECTION) &&
2550 (cmd[1] & 0xe0) == 0)
2551 sdev_printk(KERN_ERR, scp->device, "Unprotected RD "
2552 "to DIF device\n");
2553 }
2554 if (sdebug_any_injecting_opt) {
2555 struct sdebug_scmd_extra_t *ep = scsi_cmd_priv(scp);
2556
2557 if (ep->inj_short)
2558 num /= 2;
2559 }
2560
2561 /* inline check_device_access_params() */
2562 if (lba + num > sdebug_capacity) {
2563 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
2564 return check_condition_result;
2565 }
2566 /* transfer length excessive (tie in to block limits VPD page) */
2567 if (num > sdebug_store_sectors) {
2568 /* needs work to find which cdb byte 'num' comes from */
2569 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
2570 return check_condition_result;
2571 }
2572
2573 if ((SCSI_DEBUG_OPT_MEDIUM_ERR & scsi_debug_opts) &&
2574 (lba <= (OPT_MEDIUM_ERR_ADDR + OPT_MEDIUM_ERR_NUM - 1)) &&
2575 ((lba + num) > OPT_MEDIUM_ERR_ADDR)) {
2576 /* claim unrecoverable read error */
2577 mk_sense_buffer(scp, MEDIUM_ERROR, UNRECOVERED_READ_ERR, 0);
2578 /* set info field and valid bit for fixed descriptor */
2579 if (0x70 == (scp->sense_buffer[0] & 0x7f)) {
2580 scp->sense_buffer[0] |= 0x80; /* Valid bit */
2581 ret = (lba < OPT_MEDIUM_ERR_ADDR)
2582 ? OPT_MEDIUM_ERR_ADDR : (int)lba;
2583 put_unaligned_be32(ret, scp->sense_buffer + 3);
2584 }
2585 scsi_set_resid(scp, scsi_bufflen(scp));
2586 return check_condition_result;
2587 }
2588
2589 read_lock_irqsave(&atomic_rw, iflags);
2590
2591 /* DIX + T10 DIF */
2592 if (scsi_debug_dix && scsi_prot_sg_count(scp)) {
2593 int prot_ret = prot_verify_read(scp, lba, num, ei_lba);
2594
2595 if (prot_ret) {
2596 read_unlock_irqrestore(&atomic_rw, iflags);
2597 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, prot_ret);
2598 return illegal_condition_result;
2599 }
2600 }
2601
2602 ret = do_device_access(scp, lba, num, false);
2603 read_unlock_irqrestore(&atomic_rw, iflags);
2604 if (ret == -1)
2605 return DID_ERROR << 16;
2606
2607 scsi_in(scp)->resid = scsi_bufflen(scp) - ret;
2608
2609 if (sdebug_any_injecting_opt) {
2610 struct sdebug_scmd_extra_t *ep = scsi_cmd_priv(scp);
2611
2612 if (ep->inj_recovered) {
2613 mk_sense_buffer(scp, RECOVERED_ERROR,
2614 THRESHOLD_EXCEEDED, 0);
2615 return check_condition_result;
2616 } else if (ep->inj_transport) {
2617 mk_sense_buffer(scp, ABORTED_COMMAND,
2618 TRANSPORT_PROBLEM, ACK_NAK_TO);
2619 return check_condition_result;
2620 } else if (ep->inj_dif) {
2621 /* Logical block guard check failed */
2622 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 1);
2623 return illegal_condition_result;
2624 } else if (ep->inj_dix) {
2625 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 1);
2626 return illegal_condition_result;
2627 }
2628 }
2629 return 0;
2630 }
2631
2632 void dump_sector(unsigned char *buf, int len)
2633 {
2634 int i, j, n;
2635
2636 pr_err(">>> Sector Dump <<<\n");
2637 for (i = 0 ; i < len ; i += 16) {
2638 char b[128];
2639
2640 for (j = 0, n = 0; j < 16; j++) {
2641 unsigned char c = buf[i+j];
2642
2643 if (c >= 0x20 && c < 0x7e)
2644 n += scnprintf(b + n, sizeof(b) - n,
2645 " %c ", buf[i+j]);
2646 else
2647 n += scnprintf(b + n, sizeof(b) - n,
2648 "%02x ", buf[i+j]);
2649 }
2650 pr_err("%04d: %s\n", i, b);
2651 }
2652 }
2653
2654 static int prot_verify_write(struct scsi_cmnd *SCpnt, sector_t start_sec,
2655 unsigned int sectors, u32 ei_lba)
2656 {
2657 int ret;
2658 struct sd_dif_tuple *sdt;
2659 void *daddr;
2660 sector_t sector = start_sec;
2661 int ppage_offset;
2662 int dpage_offset;
2663 struct sg_mapping_iter diter;
2664 struct sg_mapping_iter piter;
2665
2666 BUG_ON(scsi_sg_count(SCpnt) == 0);
2667 BUG_ON(scsi_prot_sg_count(SCpnt) == 0);
2668
2669 sg_miter_start(&piter, scsi_prot_sglist(SCpnt),
2670 scsi_prot_sg_count(SCpnt),
2671 SG_MITER_ATOMIC | SG_MITER_FROM_SG);
2672 sg_miter_start(&diter, scsi_sglist(SCpnt), scsi_sg_count(SCpnt),
2673 SG_MITER_ATOMIC | SG_MITER_FROM_SG);
2674
2675 /* For each protection page */
2676 while (sg_miter_next(&piter)) {
2677 dpage_offset = 0;
2678 if (WARN_ON(!sg_miter_next(&diter))) {
2679 ret = 0x01;
2680 goto out;
2681 }
2682
2683 for (ppage_offset = 0; ppage_offset < piter.length;
2684 ppage_offset += sizeof(struct sd_dif_tuple)) {
2685 /* If we're at the end of the current
2686 * data page advance to the next one
2687 */
2688 if (dpage_offset >= diter.length) {
2689 if (WARN_ON(!sg_miter_next(&diter))) {
2690 ret = 0x01;
2691 goto out;
2692 }
2693 dpage_offset = 0;
2694 }
2695
2696 sdt = piter.addr + ppage_offset;
2697 daddr = diter.addr + dpage_offset;
2698
2699 ret = dif_verify(sdt, daddr, sector, ei_lba);
2700 if (ret) {
2701 dump_sector(daddr, scsi_debug_sector_size);
2702 goto out;
2703 }
2704
2705 sector++;
2706 ei_lba++;
2707 dpage_offset += scsi_debug_sector_size;
2708 }
2709 diter.consumed = dpage_offset;
2710 sg_miter_stop(&diter);
2711 }
2712 sg_miter_stop(&piter);
2713
2714 dif_copy_prot(SCpnt, start_sec, sectors, false);
2715 dix_writes++;
2716
2717 return 0;
2718
2719 out:
2720 dif_errors++;
2721 sg_miter_stop(&diter);
2722 sg_miter_stop(&piter);
2723 return ret;
2724 }
2725
2726 static unsigned long lba_to_map_index(sector_t lba)
2727 {
2728 if (scsi_debug_unmap_alignment) {
2729 lba += scsi_debug_unmap_granularity -
2730 scsi_debug_unmap_alignment;
2731 }
2732 do_div(lba, scsi_debug_unmap_granularity);
2733
2734 return lba;
2735 }
2736
2737 static sector_t map_index_to_lba(unsigned long index)
2738 {
2739 sector_t lba = index * scsi_debug_unmap_granularity;
2740
2741 if (scsi_debug_unmap_alignment) {
2742 lba -= scsi_debug_unmap_granularity -
2743 scsi_debug_unmap_alignment;
2744 }
2745
2746 return lba;
2747 }
2748
2749 static unsigned int map_state(sector_t lba, unsigned int *num)
2750 {
2751 sector_t end;
2752 unsigned int mapped;
2753 unsigned long index;
2754 unsigned long next;
2755
2756 index = lba_to_map_index(lba);
2757 mapped = test_bit(index, map_storep);
2758
2759 if (mapped)
2760 next = find_next_zero_bit(map_storep, map_size, index);
2761 else
2762 next = find_next_bit(map_storep, map_size, index);
2763
2764 end = min_t(sector_t, sdebug_store_sectors, map_index_to_lba(next));
2765 *num = end - lba;
2766
2767 return mapped;
2768 }
2769
2770 static void map_region(sector_t lba, unsigned int len)
2771 {
2772 sector_t end = lba + len;
2773
2774 while (lba < end) {
2775 unsigned long index = lba_to_map_index(lba);
2776
2777 if (index < map_size)
2778 set_bit(index, map_storep);
2779
2780 lba = map_index_to_lba(index + 1);
2781 }
2782 }
2783
2784 static void unmap_region(sector_t lba, unsigned int len)
2785 {
2786 sector_t end = lba + len;
2787
2788 while (lba < end) {
2789 unsigned long index = lba_to_map_index(lba);
2790
2791 if (lba == map_index_to_lba(index) &&
2792 lba + scsi_debug_unmap_granularity <= end &&
2793 index < map_size) {
2794 clear_bit(index, map_storep);
2795 if (scsi_debug_lbprz) {
2796 memset(fake_storep +
2797 lba * scsi_debug_sector_size, 0,
2798 scsi_debug_sector_size *
2799 scsi_debug_unmap_granularity);
2800 }
2801 if (dif_storep) {
2802 memset(dif_storep + lba, 0xff,
2803 sizeof(*dif_storep) *
2804 scsi_debug_unmap_granularity);
2805 }
2806 }
2807 lba = map_index_to_lba(index + 1);
2808 }
2809 }
2810
2811 static int
2812 resp_write_dt0(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
2813 {
2814 u8 *cmd = scp->cmnd;
2815 u64 lba;
2816 u32 num;
2817 u32 ei_lba;
2818 unsigned long iflags;
2819 int ret;
2820 bool check_prot;
2821
2822 switch (cmd[0]) {
2823 case WRITE_16:
2824 ei_lba = 0;
2825 lba = get_unaligned_be64(cmd + 2);
2826 num = get_unaligned_be32(cmd + 10);
2827 check_prot = true;
2828 break;
2829 case WRITE_10:
2830 ei_lba = 0;
2831 lba = get_unaligned_be32(cmd + 2);
2832 num = get_unaligned_be16(cmd + 7);
2833 check_prot = true;
2834 break;
2835 case WRITE_6:
2836 ei_lba = 0;
2837 lba = (u32)cmd[3] | (u32)cmd[2] << 8 |
2838 (u32)(cmd[1] & 0x1f) << 16;
2839 num = (0 == cmd[4]) ? 256 : cmd[4];
2840 check_prot = true;
2841 break;
2842 case WRITE_12:
2843 ei_lba = 0;
2844 lba = get_unaligned_be32(cmd + 2);
2845 num = get_unaligned_be32(cmd + 6);
2846 check_prot = true;
2847 break;
2848 case 0x53: /* XDWRITEREAD(10) */
2849 ei_lba = 0;
2850 lba = get_unaligned_be32(cmd + 2);
2851 num = get_unaligned_be16(cmd + 7);
2852 check_prot = false;
2853 break;
2854 default: /* assume WRITE(32) */
2855 lba = get_unaligned_be64(cmd + 12);
2856 ei_lba = get_unaligned_be32(cmd + 20);
2857 num = get_unaligned_be32(cmd + 28);
2858 check_prot = false;
2859 break;
2860 }
2861 if (check_prot) {
2862 if (scsi_debug_dif == SD_DIF_TYPE2_PROTECTION &&
2863 (cmd[1] & 0xe0)) {
2864 mk_sense_invalid_opcode(scp);
2865 return check_condition_result;
2866 }
2867 if ((scsi_debug_dif == SD_DIF_TYPE1_PROTECTION ||
2868 scsi_debug_dif == SD_DIF_TYPE3_PROTECTION) &&
2869 (cmd[1] & 0xe0) == 0)
2870 sdev_printk(KERN_ERR, scp->device, "Unprotected WR "
2871 "to DIF device\n");
2872 }
2873
2874 /* inline check_device_access_params() */
2875 if (lba + num > sdebug_capacity) {
2876 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
2877 return check_condition_result;
2878 }
2879 /* transfer length excessive (tie in to block limits VPD page) */
2880 if (num > sdebug_store_sectors) {
2881 /* needs work to find which cdb byte 'num' comes from */
2882 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
2883 return check_condition_result;
2884 }
2885
2886 write_lock_irqsave(&atomic_rw, iflags);
2887
2888 /* DIX + T10 DIF */
2889 if (scsi_debug_dix && scsi_prot_sg_count(scp)) {
2890 int prot_ret = prot_verify_write(scp, lba, num, ei_lba);
2891
2892 if (prot_ret) {
2893 write_unlock_irqrestore(&atomic_rw, iflags);
2894 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, prot_ret);
2895 return illegal_condition_result;
2896 }
2897 }
2898
2899 ret = do_device_access(scp, lba, num, true);
2900 if (scsi_debug_lbp())
2901 map_region(lba, num);
2902 write_unlock_irqrestore(&atomic_rw, iflags);
2903 if (-1 == ret)
2904 return (DID_ERROR << 16);
2905 else if ((ret < (num * scsi_debug_sector_size)) &&
2906 (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts))
2907 sdev_printk(KERN_INFO, scp->device,
2908 "%s: write: cdb indicated=%u, IO sent=%d bytes\n",
2909 my_name, num * scsi_debug_sector_size, ret);
2910
2911 if (sdebug_any_injecting_opt) {
2912 struct sdebug_scmd_extra_t *ep = scsi_cmd_priv(scp);
2913
2914 if (ep->inj_recovered) {
2915 mk_sense_buffer(scp, RECOVERED_ERROR,
2916 THRESHOLD_EXCEEDED, 0);
2917 return check_condition_result;
2918 } else if (ep->inj_dif) {
2919 /* Logical block guard check failed */
2920 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 1);
2921 return illegal_condition_result;
2922 } else if (ep->inj_dix) {
2923 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 1);
2924 return illegal_condition_result;
2925 }
2926 }
2927 return 0;
2928 }
2929
2930 static int
2931 resp_write_same(struct scsi_cmnd *scp, u64 lba, u32 num, u32 ei_lba,
2932 bool unmap, bool ndob)
2933 {
2934 unsigned long iflags;
2935 unsigned long long i;
2936 int ret;
2937
2938 ret = check_device_access_params(scp, lba, num);
2939 if (ret)
2940 return ret;
2941
2942 write_lock_irqsave(&atomic_rw, iflags);
2943
2944 if (unmap && scsi_debug_lbp()) {
2945 unmap_region(lba, num);
2946 goto out;
2947 }
2948
2949 /* if ndob then zero 1 logical block, else fetch 1 logical block */
2950 if (ndob) {
2951 memset(fake_storep + (lba * scsi_debug_sector_size), 0,
2952 scsi_debug_sector_size);
2953 ret = 0;
2954 } else
2955 ret = fetch_to_dev_buffer(scp, fake_storep +
2956 (lba * scsi_debug_sector_size),
2957 scsi_debug_sector_size);
2958
2959 if (-1 == ret) {
2960 write_unlock_irqrestore(&atomic_rw, iflags);
2961 return (DID_ERROR << 16);
2962 } else if ((ret < (num * scsi_debug_sector_size)) &&
2963 (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts))
2964 sdev_printk(KERN_INFO, scp->device,
2965 "%s: %s: cdb indicated=%u, IO sent=%d bytes\n",
2966 my_name, "write same",
2967 num * scsi_debug_sector_size, ret);
2968
2969 /* Copy first sector to remaining blocks */
2970 for (i = 1 ; i < num ; i++)
2971 memcpy(fake_storep + ((lba + i) * scsi_debug_sector_size),
2972 fake_storep + (lba * scsi_debug_sector_size),
2973 scsi_debug_sector_size);
2974
2975 if (scsi_debug_lbp())
2976 map_region(lba, num);
2977 out:
2978 write_unlock_irqrestore(&atomic_rw, iflags);
2979
2980 return 0;
2981 }
2982
2983 static int
2984 resp_write_same_10(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
2985 {
2986 u8 *cmd = scp->cmnd;
2987 u32 lba;
2988 u16 num;
2989 u32 ei_lba = 0;
2990 bool unmap = false;
2991
2992 if (cmd[1] & 0x8) {
2993 if (scsi_debug_lbpws10 == 0) {
2994 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 3);
2995 return check_condition_result;
2996 } else
2997 unmap = true;
2998 }
2999 lba = get_unaligned_be32(cmd + 2);
3000 num = get_unaligned_be16(cmd + 7);
3001 if (num > scsi_debug_write_same_length) {
3002 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 7, -1);
3003 return check_condition_result;
3004 }
3005 return resp_write_same(scp, lba, num, ei_lba, unmap, false);
3006 }
3007
3008 static int
3009 resp_write_same_16(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
3010 {
3011 u8 *cmd = scp->cmnd;
3012 u64 lba;
3013 u32 num;
3014 u32 ei_lba = 0;
3015 bool unmap = false;
3016 bool ndob = false;
3017
3018 if (cmd[1] & 0x8) { /* UNMAP */
3019 if (scsi_debug_lbpws == 0) {
3020 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 3);
3021 return check_condition_result;
3022 } else
3023 unmap = true;
3024 }
3025 if (cmd[1] & 0x1) /* NDOB (no data-out buffer, assumes zeroes) */
3026 ndob = true;
3027 lba = get_unaligned_be64(cmd + 2);
3028 num = get_unaligned_be32(cmd + 10);
3029 if (num > scsi_debug_write_same_length) {
3030 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 10, -1);
3031 return check_condition_result;
3032 }
3033 return resp_write_same(scp, lba, num, ei_lba, unmap, ndob);
3034 }
3035
3036 static int
3037 resp_comp_write(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
3038 {
3039 u8 *cmd = scp->cmnd;
3040 u8 *arr;
3041 u8 *fake_storep_hold;
3042 u64 lba;
3043 u32 dnum;
3044 u32 lb_size = scsi_debug_sector_size;
3045 u8 num;
3046 unsigned long iflags;
3047 int ret;
3048 int retval = 0;
3049
3050 lba = get_unaligned_be64(cmd + 2);
3051 num = cmd[13]; /* 1 to a maximum of 255 logical blocks */
3052 if (0 == num)
3053 return 0; /* degenerate case, not an error */
3054 if (scsi_debug_dif == SD_DIF_TYPE2_PROTECTION &&
3055 (cmd[1] & 0xe0)) {
3056 mk_sense_invalid_opcode(scp);
3057 return check_condition_result;
3058 }
3059 if ((scsi_debug_dif == SD_DIF_TYPE1_PROTECTION ||
3060 scsi_debug_dif == SD_DIF_TYPE3_PROTECTION) &&
3061 (cmd[1] & 0xe0) == 0)
3062 sdev_printk(KERN_ERR, scp->device, "Unprotected WR "
3063 "to DIF device\n");
3064
3065 /* inline check_device_access_params() */
3066 if (lba + num > sdebug_capacity) {
3067 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
3068 return check_condition_result;
3069 }
3070 /* transfer length excessive (tie in to block limits VPD page) */
3071 if (num > sdebug_store_sectors) {
3072 /* needs work to find which cdb byte 'num' comes from */
3073 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
3074 return check_condition_result;
3075 }
3076 dnum = 2 * num;
3077 arr = kzalloc(dnum * lb_size, GFP_ATOMIC);
3078 if (NULL == arr) {
3079 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
3080 INSUFF_RES_ASCQ);
3081 return check_condition_result;
3082 }
3083
3084 write_lock_irqsave(&atomic_rw, iflags);
3085
3086 /* trick do_device_access() to fetch both compare and write buffers
3087 * from data-in into arr. Safe (atomic) since write_lock held. */
3088 fake_storep_hold = fake_storep;
3089 fake_storep = arr;
3090 ret = do_device_access(scp, 0, dnum, true);
3091 fake_storep = fake_storep_hold;
3092 if (ret == -1) {
3093 retval = DID_ERROR << 16;
3094 goto cleanup;
3095 } else if ((ret < (dnum * lb_size)) &&
3096 (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts))
3097 sdev_printk(KERN_INFO, scp->device, "%s: compare_write: cdb "
3098 "indicated=%u, IO sent=%d bytes\n", my_name,
3099 dnum * lb_size, ret);
3100 if (!comp_write_worker(lba, num, arr)) {
3101 mk_sense_buffer(scp, MISCOMPARE, MISCOMPARE_VERIFY_ASC, 0);
3102 retval = check_condition_result;
3103 goto cleanup;
3104 }
3105 if (scsi_debug_lbp())
3106 map_region(lba, num);
3107 cleanup:
3108 write_unlock_irqrestore(&atomic_rw, iflags);
3109 kfree(arr);
3110 return retval;
3111 }
3112
3113 struct unmap_block_desc {
3114 __be64 lba;
3115 __be32 blocks;
3116 __be32 __reserved;
3117 };
3118
3119 static int
3120 resp_unmap(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
3121 {
3122 unsigned char *buf;
3123 struct unmap_block_desc *desc;
3124 unsigned int i, payload_len, descriptors;
3125 int ret;
3126 unsigned long iflags;
3127
3128
3129 if (!scsi_debug_lbp())
3130 return 0; /* fib and say its done */
3131 payload_len = get_unaligned_be16(scp->cmnd + 7);
3132 BUG_ON(scsi_bufflen(scp) != payload_len);
3133
3134 descriptors = (payload_len - 8) / 16;
3135 if (descriptors > scsi_debug_unmap_max_desc) {
3136 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 7, -1);
3137 return check_condition_result;
3138 }
3139
3140 buf = kmalloc(scsi_bufflen(scp), GFP_ATOMIC);
3141 if (!buf) {
3142 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
3143 INSUFF_RES_ASCQ);
3144 return check_condition_result;
3145 }
3146
3147 scsi_sg_copy_to_buffer(scp, buf, scsi_bufflen(scp));
3148
3149 BUG_ON(get_unaligned_be16(&buf[0]) != payload_len - 2);
3150 BUG_ON(get_unaligned_be16(&buf[2]) != descriptors * 16);
3151
3152 desc = (void *)&buf[8];
3153
3154 write_lock_irqsave(&atomic_rw, iflags);
3155
3156 for (i = 0 ; i < descriptors ; i++) {
3157 unsigned long long lba = get_unaligned_be64(&desc[i].lba);
3158 unsigned int num = get_unaligned_be32(&desc[i].blocks);
3159
3160 ret = check_device_access_params(scp, lba, num);
3161 if (ret)
3162 goto out;
3163
3164 unmap_region(lba, num);
3165 }
3166
3167 ret = 0;
3168
3169 out:
3170 write_unlock_irqrestore(&atomic_rw, iflags);
3171 kfree(buf);
3172
3173 return ret;
3174 }
3175
3176 #define SDEBUG_GET_LBA_STATUS_LEN 32
3177
3178 static int
3179 resp_get_lba_status(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
3180 {
3181 u8 *cmd = scp->cmnd;
3182 u64 lba;
3183 u32 alloc_len, mapped, num;
3184 u8 arr[SDEBUG_GET_LBA_STATUS_LEN];
3185 int ret;
3186
3187 lba = get_unaligned_be64(cmd + 2);
3188 alloc_len = get_unaligned_be32(cmd + 10);
3189
3190 if (alloc_len < 24)
3191 return 0;
3192
3193 ret = check_device_access_params(scp, lba, 1);
3194 if (ret)
3195 return ret;
3196
3197 if (scsi_debug_lbp())
3198 mapped = map_state(lba, &num);
3199 else {
3200 mapped = 1;
3201 /* following just in case virtual_gb changed */
3202 sdebug_capacity = get_sdebug_capacity();
3203 if (sdebug_capacity - lba <= 0xffffffff)
3204 num = sdebug_capacity - lba;
3205 else
3206 num = 0xffffffff;
3207 }
3208
3209 memset(arr, 0, SDEBUG_GET_LBA_STATUS_LEN);
3210 put_unaligned_be32(20, arr); /* Parameter Data Length */
3211 put_unaligned_be64(lba, arr + 8); /* LBA */
3212 put_unaligned_be32(num, arr + 16); /* Number of blocks */
3213 arr[20] = !mapped; /* prov_stat=0: mapped; 1: dealloc */
3214
3215 return fill_from_dev_buffer(scp, arr, SDEBUG_GET_LBA_STATUS_LEN);
3216 }
3217
3218 #define SDEBUG_RLUN_ARR_SZ 256
3219
3220 static int resp_report_luns(struct scsi_cmnd * scp,
3221 struct sdebug_dev_info * devip)
3222 {
3223 unsigned int alloc_len;
3224 int lun_cnt, i, upper, num, n, want_wlun, shortish;
3225 u64 lun;
3226 unsigned char *cmd = scp->cmnd;
3227 int select_report = (int)cmd[2];
3228 struct scsi_lun *one_lun;
3229 unsigned char arr[SDEBUG_RLUN_ARR_SZ];
3230 unsigned char * max_addr;
3231
3232 alloc_len = cmd[9] + (cmd[8] << 8) + (cmd[7] << 16) + (cmd[6] << 24);
3233 shortish = (alloc_len < 4);
3234 if (shortish || (select_report > 2)) {
3235 mk_sense_invalid_fld(scp, SDEB_IN_CDB, shortish ? 6 : 2, -1);
3236 return check_condition_result;
3237 }
3238 /* can produce response with up to 16k luns (lun 0 to lun 16383) */
3239 memset(arr, 0, SDEBUG_RLUN_ARR_SZ);
3240 lun_cnt = scsi_debug_max_luns;
3241 if (1 == select_report)
3242 lun_cnt = 0;
3243 else if (scsi_debug_no_lun_0 && (lun_cnt > 0))
3244 --lun_cnt;
3245 want_wlun = (select_report > 0) ? 1 : 0;
3246 num = lun_cnt + want_wlun;
3247 arr[2] = ((sizeof(struct scsi_lun) * num) >> 8) & 0xff;
3248 arr[3] = (sizeof(struct scsi_lun) * num) & 0xff;
3249 n = min((int)((SDEBUG_RLUN_ARR_SZ - 8) /
3250 sizeof(struct scsi_lun)), num);
3251 if (n < num) {
3252 want_wlun = 0;
3253 lun_cnt = n;
3254 }
3255 one_lun = (struct scsi_lun *) &arr[8];
3256 max_addr = arr + SDEBUG_RLUN_ARR_SZ;
3257 for (i = 0, lun = (scsi_debug_no_lun_0 ? 1 : 0);
3258 ((i < lun_cnt) && ((unsigned char *)(one_lun + i) < max_addr));
3259 i++, lun++) {
3260 upper = (lun >> 8) & 0x3f;
3261 if (upper)
3262 one_lun[i].scsi_lun[0] =
3263 (upper | (SAM2_LUN_ADDRESS_METHOD << 6));
3264 one_lun[i].scsi_lun[1] = lun & 0xff;
3265 }
3266 if (want_wlun) {
3267 one_lun[i].scsi_lun[0] = (SAM2_WLUN_REPORT_LUNS >> 8) & 0xff;
3268 one_lun[i].scsi_lun[1] = SAM2_WLUN_REPORT_LUNS & 0xff;
3269 i++;
3270 }
3271 alloc_len = (unsigned char *)(one_lun + i) - arr;
3272 return fill_from_dev_buffer(scp, arr,
3273 min((int)alloc_len, SDEBUG_RLUN_ARR_SZ));
3274 }
3275
3276 static int resp_xdwriteread(struct scsi_cmnd *scp, unsigned long long lba,
3277 unsigned int num, struct sdebug_dev_info *devip)
3278 {
3279 int j;
3280 unsigned char *kaddr, *buf;
3281 unsigned int offset;
3282 struct scsi_data_buffer *sdb = scsi_in(scp);
3283 struct sg_mapping_iter miter;
3284
3285 /* better not to use temporary buffer. */
3286 buf = kmalloc(scsi_bufflen(scp), GFP_ATOMIC);
3287 if (!buf) {
3288 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
3289 INSUFF_RES_ASCQ);
3290 return check_condition_result;
3291 }
3292
3293 scsi_sg_copy_to_buffer(scp, buf, scsi_bufflen(scp));
3294
3295 offset = 0;
3296 sg_miter_start(&miter, sdb->table.sgl, sdb->table.nents,
3297 SG_MITER_ATOMIC | SG_MITER_TO_SG);
3298
3299 while (sg_miter_next(&miter)) {
3300 kaddr = miter.addr;
3301 for (j = 0; j < miter.length; j++)
3302 *(kaddr + j) ^= *(buf + offset + j);
3303
3304 offset += miter.length;
3305 }
3306 sg_miter_stop(&miter);
3307 kfree(buf);
3308
3309 return 0;
3310 }
3311
3312 static int
3313 resp_xdwriteread_10(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
3314 {
3315 u8 *cmd = scp->cmnd;
3316 u64 lba;
3317 u32 num;
3318 int errsts;
3319
3320 if (!scsi_bidi_cmnd(scp)) {
3321 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
3322 INSUFF_RES_ASCQ);
3323 return check_condition_result;
3324 }
3325 errsts = resp_read_dt0(scp, devip);
3326 if (errsts)
3327 return errsts;
3328 if (!(cmd[1] & 0x4)) { /* DISABLE_WRITE is not set */
3329 errsts = resp_write_dt0(scp, devip);
3330 if (errsts)
3331 return errsts;
3332 }
3333 lba = get_unaligned_be32(cmd + 2);
3334 num = get_unaligned_be16(cmd + 7);
3335 return resp_xdwriteread(scp, lba, num, devip);
3336 }
3337
3338 /* When timer or tasklet goes off this function is called. */
3339 static void sdebug_q_cmd_complete(unsigned long indx)
3340 {
3341 int qa_indx;
3342 int retiring = 0;
3343 unsigned long iflags;
3344 struct sdebug_queued_cmd *sqcp;
3345 struct scsi_cmnd *scp;
3346 struct sdebug_dev_info *devip;
3347
3348 atomic_inc(&sdebug_completions);
3349 qa_indx = indx;
3350 if ((qa_indx < 0) || (qa_indx >= SCSI_DEBUG_CANQUEUE)) {
3351 pr_err("%s: wild qa_indx=%d\n", __func__, qa_indx);
3352 return;
3353 }
3354 spin_lock_irqsave(&queued_arr_lock, iflags);
3355 sqcp = &queued_arr[qa_indx];
3356 scp = sqcp->a_cmnd;
3357 if (NULL == scp) {
3358 spin_unlock_irqrestore(&queued_arr_lock, iflags);
3359 pr_err("%s: scp is NULL\n", __func__);
3360 return;
3361 }
3362 devip = (struct sdebug_dev_info *)scp->device->hostdata;
3363 if (devip)
3364 atomic_dec(&devip->num_in_q);
3365 else
3366 pr_err("%s: devip=NULL\n", __func__);
3367 if (atomic_read(&retired_max_queue) > 0)
3368 retiring = 1;
3369
3370 sqcp->a_cmnd = NULL;
3371 if (!test_and_clear_bit(qa_indx, queued_in_use_bm)) {
3372 spin_unlock_irqrestore(&queued_arr_lock, iflags);
3373 pr_err("%s: Unexpected completion\n", __func__);
3374 return;
3375 }
3376
3377 if (unlikely(retiring)) { /* user has reduced max_queue */
3378 int k, retval;
3379
3380 retval = atomic_read(&retired_max_queue);
3381 if (qa_indx >= retval) {
3382 spin_unlock_irqrestore(&queued_arr_lock, iflags);
3383 pr_err("%s: index %d too large\n", __func__, retval);
3384 return;
3385 }
3386 k = find_last_bit(queued_in_use_bm, retval);
3387 if ((k < scsi_debug_max_queue) || (k == retval))
3388 atomic_set(&retired_max_queue, 0);
3389 else
3390 atomic_set(&retired_max_queue, k + 1);
3391 }
3392 spin_unlock_irqrestore(&queued_arr_lock, iflags);
3393 scp->scsi_done(scp); /* callback to mid level */
3394 }
3395
3396 /* When high resolution timer goes off this function is called. */
3397 static enum hrtimer_restart
3398 sdebug_q_cmd_hrt_complete(struct hrtimer *timer)
3399 {
3400 int qa_indx;
3401 int retiring = 0;
3402 unsigned long iflags;
3403 struct sdebug_hrtimer *sd_hrtp = (struct sdebug_hrtimer *)timer;
3404 struct sdebug_queued_cmd *sqcp;
3405 struct scsi_cmnd *scp;
3406 struct sdebug_dev_info *devip;
3407
3408 atomic_inc(&sdebug_completions);
3409 qa_indx = sd_hrtp->qa_indx;
3410 if ((qa_indx < 0) || (qa_indx >= SCSI_DEBUG_CANQUEUE)) {
3411 pr_err("%s: wild qa_indx=%d\n", __func__, qa_indx);
3412 goto the_end;
3413 }
3414 spin_lock_irqsave(&queued_arr_lock, iflags);
3415 sqcp = &queued_arr[qa_indx];
3416 scp = sqcp->a_cmnd;
3417 if (NULL == scp) {
3418 spin_unlock_irqrestore(&queued_arr_lock, iflags);
3419 pr_err("%s: scp is NULL\n", __func__);
3420 goto the_end;
3421 }
3422 devip = (struct sdebug_dev_info *)scp->device->hostdata;
3423 if (devip)
3424 atomic_dec(&devip->num_in_q);
3425 else
3426 pr_err("%s: devip=NULL\n", __func__);
3427 if (atomic_read(&retired_max_queue) > 0)
3428 retiring = 1;
3429
3430 sqcp->a_cmnd = NULL;
3431 if (!test_and_clear_bit(qa_indx, queued_in_use_bm)) {
3432 spin_unlock_irqrestore(&queued_arr_lock, iflags);
3433 pr_err("%s: Unexpected completion\n", __func__);
3434 goto the_end;
3435 }
3436
3437 if (unlikely(retiring)) { /* user has reduced max_queue */
3438 int k, retval;
3439
3440 retval = atomic_read(&retired_max_queue);
3441 if (qa_indx >= retval) {
3442 spin_unlock_irqrestore(&queued_arr_lock, iflags);
3443 pr_err("%s: index %d too large\n", __func__, retval);
3444 goto the_end;
3445 }
3446 k = find_last_bit(queued_in_use_bm, retval);
3447 if ((k < scsi_debug_max_queue) || (k == retval))
3448 atomic_set(&retired_max_queue, 0);
3449 else
3450 atomic_set(&retired_max_queue, k + 1);
3451 }
3452 spin_unlock_irqrestore(&queued_arr_lock, iflags);
3453 scp->scsi_done(scp); /* callback to mid level */
3454 the_end:
3455 return HRTIMER_NORESTART;
3456 }
3457
3458 static struct sdebug_dev_info *
3459 sdebug_device_create(struct sdebug_host_info *sdbg_host, gfp_t flags)
3460 {
3461 struct sdebug_dev_info *devip;
3462
3463 devip = kzalloc(sizeof(*devip), flags);
3464 if (devip) {
3465 devip->sdbg_host = sdbg_host;
3466 list_add_tail(&devip->dev_list, &sdbg_host->dev_info_list);
3467 }
3468 return devip;
3469 }
3470
3471 static struct sdebug_dev_info * devInfoReg(struct scsi_device * sdev)
3472 {
3473 struct sdebug_host_info * sdbg_host;
3474 struct sdebug_dev_info * open_devip = NULL;
3475 struct sdebug_dev_info * devip =
3476 (struct sdebug_dev_info *)sdev->hostdata;
3477
3478 if (devip)
3479 return devip;
3480 sdbg_host = *(struct sdebug_host_info **)shost_priv(sdev->host);
3481 if (!sdbg_host) {
3482 pr_err("%s: Host info NULL\n", __func__);
3483 return NULL;
3484 }
3485 list_for_each_entry(devip, &sdbg_host->dev_info_list, dev_list) {
3486 if ((devip->used) && (devip->channel == sdev->channel) &&
3487 (devip->target == sdev->id) &&
3488 (devip->lun == sdev->lun))
3489 return devip;
3490 else {
3491 if ((!devip->used) && (!open_devip))
3492 open_devip = devip;
3493 }
3494 }
3495 if (!open_devip) { /* try and make a new one */
3496 open_devip = sdebug_device_create(sdbg_host, GFP_ATOMIC);
3497 if (!open_devip) {
3498 printk(KERN_ERR "%s: out of memory at line %d\n",
3499 __func__, __LINE__);
3500 return NULL;
3501 }
3502 }
3503
3504 open_devip->channel = sdev->channel;
3505 open_devip->target = sdev->id;
3506 open_devip->lun = sdev->lun;
3507 open_devip->sdbg_host = sdbg_host;
3508 atomic_set(&open_devip->num_in_q, 0);
3509 set_bit(SDEBUG_UA_POR, open_devip->uas_bm);
3510 open_devip->used = true;
3511 return open_devip;
3512 }
3513
3514 static int scsi_debug_slave_alloc(struct scsi_device *sdp)
3515 {
3516 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
3517 printk(KERN_INFO "scsi_debug: slave_alloc <%u %u %u %llu>\n",
3518 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
3519 queue_flag_set_unlocked(QUEUE_FLAG_BIDI, sdp->request_queue);
3520 return 0;
3521 }
3522
3523 static int scsi_debug_slave_configure(struct scsi_device *sdp)
3524 {
3525 struct sdebug_dev_info *devip;
3526
3527 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
3528 printk(KERN_INFO "scsi_debug: slave_configure <%u %u %u %llu>\n",
3529 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
3530 if (sdp->host->max_cmd_len != SCSI_DEBUG_MAX_CMD_LEN)
3531 sdp->host->max_cmd_len = SCSI_DEBUG_MAX_CMD_LEN;
3532 devip = devInfoReg(sdp);
3533 if (NULL == devip)
3534 return 1; /* no resources, will be marked offline */
3535 sdp->hostdata = devip;
3536 blk_queue_max_segment_size(sdp->request_queue, -1U);
3537 if (scsi_debug_no_uld)
3538 sdp->no_uld_attach = 1;
3539 return 0;
3540 }
3541
3542 static void scsi_debug_slave_destroy(struct scsi_device *sdp)
3543 {
3544 struct sdebug_dev_info *devip =
3545 (struct sdebug_dev_info *)sdp->hostdata;
3546
3547 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
3548 printk(KERN_INFO "scsi_debug: slave_destroy <%u %u %u %llu>\n",
3549 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
3550 if (devip) {
3551 /* make this slot available for re-use */
3552 devip->used = false;
3553 sdp->hostdata = NULL;
3554 }
3555 }
3556
3557 /* Returns 1 if cmnd found (deletes its timer or tasklet), else returns 0 */
3558 static int stop_queued_cmnd(struct scsi_cmnd *cmnd)
3559 {
3560 unsigned long iflags;
3561 int k, qmax, r_qmax;
3562 struct sdebug_queued_cmd *sqcp;
3563 struct sdebug_dev_info *devip;
3564
3565 spin_lock_irqsave(&queued_arr_lock, iflags);
3566 qmax = scsi_debug_max_queue;
3567 r_qmax = atomic_read(&retired_max_queue);
3568 if (r_qmax > qmax)
3569 qmax = r_qmax;
3570 for (k = 0; k < qmax; ++k) {
3571 if (test_bit(k, queued_in_use_bm)) {
3572 sqcp = &queued_arr[k];
3573 if (cmnd == sqcp->a_cmnd) {
3574 devip = (struct sdebug_dev_info *)
3575 cmnd->device->hostdata;
3576 if (devip)
3577 atomic_dec(&devip->num_in_q);
3578 sqcp->a_cmnd = NULL;
3579 spin_unlock_irqrestore(&queued_arr_lock,
3580 iflags);
3581 if (scsi_debug_ndelay > 0) {
3582 if (sqcp->sd_hrtp)
3583 hrtimer_cancel(
3584 &sqcp->sd_hrtp->hrt);
3585 } else if (scsi_debug_delay > 0) {
3586 if (sqcp->cmnd_timerp)
3587 del_timer_sync(
3588 sqcp->cmnd_timerp);
3589 } else if (scsi_debug_delay < 0) {
3590 if (sqcp->tletp)
3591 tasklet_kill(sqcp->tletp);
3592 }
3593 clear_bit(k, queued_in_use_bm);
3594 return 1;
3595 }
3596 }
3597 }
3598 spin_unlock_irqrestore(&queued_arr_lock, iflags);
3599 return 0;
3600 }
3601
3602 /* Deletes (stops) timers or tasklets of all queued commands */
3603 static void stop_all_queued(void)
3604 {
3605 unsigned long iflags;
3606 int k;
3607 struct sdebug_queued_cmd *sqcp;
3608 struct sdebug_dev_info *devip;
3609
3610 spin_lock_irqsave(&queued_arr_lock, iflags);
3611 for (k = 0; k < SCSI_DEBUG_CANQUEUE; ++k) {
3612 if (test_bit(k, queued_in_use_bm)) {
3613 sqcp = &queued_arr[k];
3614 if (sqcp->a_cmnd) {
3615 devip = (struct sdebug_dev_info *)
3616 sqcp->a_cmnd->device->hostdata;
3617 if (devip)
3618 atomic_dec(&devip->num_in_q);
3619 sqcp->a_cmnd = NULL;
3620 spin_unlock_irqrestore(&queued_arr_lock,
3621 iflags);
3622 if (scsi_debug_ndelay > 0) {
3623 if (sqcp->sd_hrtp)
3624 hrtimer_cancel(
3625 &sqcp->sd_hrtp->hrt);
3626 } else if (scsi_debug_delay > 0) {
3627 if (sqcp->cmnd_timerp)
3628 del_timer_sync(
3629 sqcp->cmnd_timerp);
3630 } else if (scsi_debug_delay < 0) {
3631 if (sqcp->tletp)
3632 tasklet_kill(sqcp->tletp);
3633 }
3634 clear_bit(k, queued_in_use_bm);
3635 spin_lock_irqsave(&queued_arr_lock, iflags);
3636 }
3637 }
3638 }
3639 spin_unlock_irqrestore(&queued_arr_lock, iflags);
3640 }
3641
3642 /* Free queued command memory on heap */
3643 static void free_all_queued(void)
3644 {
3645 unsigned long iflags;
3646 int k;
3647 struct sdebug_queued_cmd *sqcp;
3648
3649 spin_lock_irqsave(&queued_arr_lock, iflags);
3650 for (k = 0; k < SCSI_DEBUG_CANQUEUE; ++k) {
3651 sqcp = &queued_arr[k];
3652 kfree(sqcp->cmnd_timerp);
3653 sqcp->cmnd_timerp = NULL;
3654 kfree(sqcp->tletp);
3655 sqcp->tletp = NULL;
3656 kfree(sqcp->sd_hrtp);
3657 sqcp->sd_hrtp = NULL;
3658 }
3659 spin_unlock_irqrestore(&queued_arr_lock, iflags);
3660 }
3661
3662 static int scsi_debug_abort(struct scsi_cmnd *SCpnt)
3663 {
3664 ++num_aborts;
3665 if (SCpnt) {
3666 if (SCpnt->device &&
3667 (SCSI_DEBUG_OPT_ALL_NOISE & scsi_debug_opts))
3668 sdev_printk(KERN_INFO, SCpnt->device, "%s\n",
3669 __func__);
3670 stop_queued_cmnd(SCpnt);
3671 }
3672 return SUCCESS;
3673 }
3674
3675 static int scsi_debug_device_reset(struct scsi_cmnd * SCpnt)
3676 {
3677 struct sdebug_dev_info * devip;
3678
3679 ++num_dev_resets;
3680 if (SCpnt && SCpnt->device) {
3681 struct scsi_device *sdp = SCpnt->device;
3682
3683 if (SCSI_DEBUG_OPT_ALL_NOISE & scsi_debug_opts)
3684 sdev_printk(KERN_INFO, sdp, "%s\n", __func__);
3685 devip = devInfoReg(sdp);
3686 if (devip)
3687 set_bit(SDEBUG_UA_POR, devip->uas_bm);
3688 }
3689 return SUCCESS;
3690 }
3691
3692 static int scsi_debug_target_reset(struct scsi_cmnd *SCpnt)
3693 {
3694 struct sdebug_host_info *sdbg_host;
3695 struct sdebug_dev_info *devip;
3696 struct scsi_device *sdp;
3697 struct Scsi_Host *hp;
3698 int k = 0;
3699
3700 ++num_target_resets;
3701 if (!SCpnt)
3702 goto lie;
3703 sdp = SCpnt->device;
3704 if (!sdp)
3705 goto lie;
3706 if (SCSI_DEBUG_OPT_ALL_NOISE & scsi_debug_opts)
3707 sdev_printk(KERN_INFO, sdp, "%s\n", __func__);
3708 hp = sdp->host;
3709 if (!hp)
3710 goto lie;
3711 sdbg_host = *(struct sdebug_host_info **)shost_priv(hp);
3712 if (sdbg_host) {
3713 list_for_each_entry(devip,
3714 &sdbg_host->dev_info_list,
3715 dev_list)
3716 if (devip->target == sdp->id) {
3717 set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm);
3718 ++k;
3719 }
3720 }
3721 if (SCSI_DEBUG_OPT_RESET_NOISE & scsi_debug_opts)
3722 sdev_printk(KERN_INFO, sdp,
3723 "%s: %d device(s) found in target\n", __func__, k);
3724 lie:
3725 return SUCCESS;
3726 }
3727
3728 static int scsi_debug_bus_reset(struct scsi_cmnd * SCpnt)
3729 {
3730 struct sdebug_host_info *sdbg_host;
3731 struct sdebug_dev_info *devip;
3732 struct scsi_device * sdp;
3733 struct Scsi_Host * hp;
3734 int k = 0;
3735
3736 ++num_bus_resets;
3737 if (!(SCpnt && SCpnt->device))
3738 goto lie;
3739 sdp = SCpnt->device;
3740 if (SCSI_DEBUG_OPT_ALL_NOISE & scsi_debug_opts)
3741 sdev_printk(KERN_INFO, sdp, "%s\n", __func__);
3742 hp = sdp->host;
3743 if (hp) {
3744 sdbg_host = *(struct sdebug_host_info **)shost_priv(hp);
3745 if (sdbg_host) {
3746 list_for_each_entry(devip,
3747 &sdbg_host->dev_info_list,
3748 dev_list) {
3749 set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm);
3750 ++k;
3751 }
3752 }
3753 }
3754 if (SCSI_DEBUG_OPT_RESET_NOISE & scsi_debug_opts)
3755 sdev_printk(KERN_INFO, sdp,
3756 "%s: %d device(s) found in host\n", __func__, k);
3757 lie:
3758 return SUCCESS;
3759 }
3760
3761 static int scsi_debug_host_reset(struct scsi_cmnd * SCpnt)
3762 {
3763 struct sdebug_host_info * sdbg_host;
3764 struct sdebug_dev_info *devip;
3765 int k = 0;
3766
3767 ++num_host_resets;
3768 if ((SCpnt->device) && (SCSI_DEBUG_OPT_ALL_NOISE & scsi_debug_opts))
3769 sdev_printk(KERN_INFO, SCpnt->device, "%s\n", __func__);
3770 spin_lock(&sdebug_host_list_lock);
3771 list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) {
3772 list_for_each_entry(devip, &sdbg_host->dev_info_list,
3773 dev_list) {
3774 set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm);
3775 ++k;
3776 }
3777 }
3778 spin_unlock(&sdebug_host_list_lock);
3779 stop_all_queued();
3780 if (SCSI_DEBUG_OPT_RESET_NOISE & scsi_debug_opts)
3781 sdev_printk(KERN_INFO, SCpnt->device,
3782 "%s: %d device(s) found\n", __func__, k);
3783 return SUCCESS;
3784 }
3785
3786 static void __init sdebug_build_parts(unsigned char *ramp,
3787 unsigned long store_size)
3788 {
3789 struct partition * pp;
3790 int starts[SDEBUG_MAX_PARTS + 2];
3791 int sectors_per_part, num_sectors, k;
3792 int heads_by_sects, start_sec, end_sec;
3793
3794 /* assume partition table already zeroed */
3795 if ((scsi_debug_num_parts < 1) || (store_size < 1048576))
3796 return;
3797 if (scsi_debug_num_parts > SDEBUG_MAX_PARTS) {
3798 scsi_debug_num_parts = SDEBUG_MAX_PARTS;
3799 pr_warn("%s: reducing partitions to %d\n", __func__,
3800 SDEBUG_MAX_PARTS);
3801 }
3802 num_sectors = (int)sdebug_store_sectors;
3803 sectors_per_part = (num_sectors - sdebug_sectors_per)
3804 / scsi_debug_num_parts;
3805 heads_by_sects = sdebug_heads * sdebug_sectors_per;
3806 starts[0] = sdebug_sectors_per;
3807 for (k = 1; k < scsi_debug_num_parts; ++k)
3808 starts[k] = ((k * sectors_per_part) / heads_by_sects)
3809 * heads_by_sects;
3810 starts[scsi_debug_num_parts] = num_sectors;
3811 starts[scsi_debug_num_parts + 1] = 0;
3812
3813 ramp[510] = 0x55; /* magic partition markings */
3814 ramp[511] = 0xAA;
3815 pp = (struct partition *)(ramp + 0x1be);
3816 for (k = 0; starts[k + 1]; ++k, ++pp) {
3817 start_sec = starts[k];
3818 end_sec = starts[k + 1] - 1;
3819 pp->boot_ind = 0;
3820
3821 pp->cyl = start_sec / heads_by_sects;
3822 pp->head = (start_sec - (pp->cyl * heads_by_sects))
3823 / sdebug_sectors_per;
3824 pp->sector = (start_sec % sdebug_sectors_per) + 1;
3825
3826 pp->end_cyl = end_sec / heads_by_sects;
3827 pp->end_head = (end_sec - (pp->end_cyl * heads_by_sects))
3828 / sdebug_sectors_per;
3829 pp->end_sector = (end_sec % sdebug_sectors_per) + 1;
3830
3831 pp->start_sect = cpu_to_le32(start_sec);
3832 pp->nr_sects = cpu_to_le32(end_sec - start_sec + 1);
3833 pp->sys_ind = 0x83; /* plain Linux partition */
3834 }
3835 }
3836
3837 static int
3838 schedule_resp(struct scsi_cmnd *cmnd, struct sdebug_dev_info *devip,
3839 int scsi_result, int delta_jiff)
3840 {
3841 unsigned long iflags;
3842 int k, num_in_q, qdepth, inject;
3843 struct sdebug_queued_cmd *sqcp = NULL;
3844 struct scsi_device *sdp = cmnd->device;
3845
3846 if (NULL == cmnd || NULL == devip) {
3847 pr_warn("%s: called with NULL cmnd or devip pointer\n",
3848 __func__);
3849 /* no particularly good error to report back */
3850 return SCSI_MLQUEUE_HOST_BUSY;
3851 }
3852 if ((scsi_result) && (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts))
3853 sdev_printk(KERN_INFO, sdp, "%s: non-zero result=0x%x\n",
3854 __func__, scsi_result);
3855 if (delta_jiff == 0)
3856 goto respond_in_thread;
3857
3858 /* schedule the response at a later time if resources permit */
3859 spin_lock_irqsave(&queued_arr_lock, iflags);
3860 num_in_q = atomic_read(&devip->num_in_q);
3861 qdepth = cmnd->device->queue_depth;
3862 inject = 0;
3863 if ((qdepth > 0) && (num_in_q >= qdepth)) {
3864 if (scsi_result) {
3865 spin_unlock_irqrestore(&queued_arr_lock, iflags);
3866 goto respond_in_thread;
3867 } else
3868 scsi_result = device_qfull_result;
3869 } else if ((scsi_debug_every_nth != 0) &&
3870 (SCSI_DEBUG_OPT_RARE_TSF & scsi_debug_opts) &&
3871 (scsi_result == 0)) {
3872 if ((num_in_q == (qdepth - 1)) &&
3873 (atomic_inc_return(&sdebug_a_tsf) >=
3874 abs(scsi_debug_every_nth))) {
3875 atomic_set(&sdebug_a_tsf, 0);
3876 inject = 1;
3877 scsi_result = device_qfull_result;
3878 }
3879 }
3880
3881 k = find_first_zero_bit(queued_in_use_bm, scsi_debug_max_queue);
3882 if (k >= scsi_debug_max_queue) {
3883 spin_unlock_irqrestore(&queued_arr_lock, iflags);
3884 if (scsi_result)
3885 goto respond_in_thread;
3886 else if (SCSI_DEBUG_OPT_ALL_TSF & scsi_debug_opts)
3887 scsi_result = device_qfull_result;
3888 if (SCSI_DEBUG_OPT_Q_NOISE & scsi_debug_opts)
3889 sdev_printk(KERN_INFO, sdp,
3890 "%s: max_queue=%d exceeded, %s\n",
3891 __func__, scsi_debug_max_queue,
3892 (scsi_result ? "status: TASK SET FULL" :
3893 "report: host busy"));
3894 if (scsi_result)
3895 goto respond_in_thread;
3896 else
3897 return SCSI_MLQUEUE_HOST_BUSY;
3898 }
3899 __set_bit(k, queued_in_use_bm);
3900 atomic_inc(&devip->num_in_q);
3901 sqcp = &queued_arr[k];
3902 sqcp->a_cmnd = cmnd;
3903 cmnd->result = scsi_result;
3904 spin_unlock_irqrestore(&queued_arr_lock, iflags);
3905 if (delta_jiff > 0) {
3906 if (NULL == sqcp->cmnd_timerp) {
3907 sqcp->cmnd_timerp = kmalloc(sizeof(struct timer_list),
3908 GFP_ATOMIC);
3909 if (NULL == sqcp->cmnd_timerp)
3910 return SCSI_MLQUEUE_HOST_BUSY;
3911 init_timer(sqcp->cmnd_timerp);
3912 }
3913 sqcp->cmnd_timerp->function = sdebug_q_cmd_complete;
3914 sqcp->cmnd_timerp->data = k;
3915 sqcp->cmnd_timerp->expires = get_jiffies_64() + delta_jiff;
3916 add_timer(sqcp->cmnd_timerp);
3917 } else if (scsi_debug_ndelay > 0) {
3918 ktime_t kt = ktime_set(0, scsi_debug_ndelay);
3919 struct sdebug_hrtimer *sd_hp = sqcp->sd_hrtp;
3920
3921 if (NULL == sd_hp) {
3922 sd_hp = kmalloc(sizeof(*sd_hp), GFP_ATOMIC);
3923 if (NULL == sd_hp)
3924 return SCSI_MLQUEUE_HOST_BUSY;
3925 sqcp->sd_hrtp = sd_hp;
3926 hrtimer_init(&sd_hp->hrt, CLOCK_MONOTONIC,
3927 HRTIMER_MODE_REL);
3928 sd_hp->hrt.function = sdebug_q_cmd_hrt_complete;
3929 sd_hp->qa_indx = k;
3930 }
3931 hrtimer_start(&sd_hp->hrt, kt, HRTIMER_MODE_REL);
3932 } else { /* delay < 0 */
3933 if (NULL == sqcp->tletp) {
3934 sqcp->tletp = kmalloc(sizeof(*sqcp->tletp),
3935 GFP_ATOMIC);
3936 if (NULL == sqcp->tletp)
3937 return SCSI_MLQUEUE_HOST_BUSY;
3938 tasklet_init(sqcp->tletp,
3939 sdebug_q_cmd_complete, k);
3940 }
3941 if (-1 == delta_jiff)
3942 tasklet_hi_schedule(sqcp->tletp);
3943 else
3944 tasklet_schedule(sqcp->tletp);
3945 }
3946 if ((SCSI_DEBUG_OPT_Q_NOISE & scsi_debug_opts) &&
3947 (scsi_result == device_qfull_result))
3948 sdev_printk(KERN_INFO, sdp,
3949 "%s: num_in_q=%d +1, %s%s\n", __func__,
3950 num_in_q, (inject ? "<inject> " : ""),
3951 "status: TASK SET FULL");
3952 return 0;
3953
3954 respond_in_thread: /* call back to mid-layer using invocation thread */
3955 cmnd->result = scsi_result;
3956 cmnd->scsi_done(cmnd);
3957 return 0;
3958 }
3959
3960 /* Note: The following macros create attribute files in the
3961 /sys/module/scsi_debug/parameters directory. Unfortunately this
3962 driver is unaware of a change and cannot trigger auxiliary actions
3963 as it can when the corresponding attribute in the
3964 /sys/bus/pseudo/drivers/scsi_debug directory is changed.
3965 */
3966 module_param_named(add_host, scsi_debug_add_host, int, S_IRUGO | S_IWUSR);
3967 module_param_named(ato, scsi_debug_ato, int, S_IRUGO);
3968 module_param_named(clustering, scsi_debug_clustering, bool, S_IRUGO | S_IWUSR);
3969 module_param_named(delay, scsi_debug_delay, int, S_IRUGO | S_IWUSR);
3970 module_param_named(dev_size_mb, scsi_debug_dev_size_mb, int, S_IRUGO);
3971 module_param_named(dif, scsi_debug_dif, int, S_IRUGO);
3972 module_param_named(dix, scsi_debug_dix, int, S_IRUGO);
3973 module_param_named(dsense, scsi_debug_dsense, int, S_IRUGO | S_IWUSR);
3974 module_param_named(every_nth, scsi_debug_every_nth, int, S_IRUGO | S_IWUSR);
3975 module_param_named(fake_rw, scsi_debug_fake_rw, int, S_IRUGO | S_IWUSR);
3976 module_param_named(guard, scsi_debug_guard, uint, S_IRUGO);
3977 module_param_named(host_lock, scsi_debug_host_lock, bool, S_IRUGO | S_IWUSR);
3978 module_param_named(lbpu, scsi_debug_lbpu, int, S_IRUGO);
3979 module_param_named(lbpws, scsi_debug_lbpws, int, S_IRUGO);
3980 module_param_named(lbpws10, scsi_debug_lbpws10, int, S_IRUGO);
3981 module_param_named(lbprz, scsi_debug_lbprz, int, S_IRUGO);
3982 module_param_named(lowest_aligned, scsi_debug_lowest_aligned, int, S_IRUGO);
3983 module_param_named(max_luns, scsi_debug_max_luns, int, S_IRUGO | S_IWUSR);
3984 module_param_named(max_queue, scsi_debug_max_queue, int, S_IRUGO | S_IWUSR);
3985 module_param_named(ndelay, scsi_debug_ndelay, int, S_IRUGO | S_IWUSR);
3986 module_param_named(no_lun_0, scsi_debug_no_lun_0, int, S_IRUGO | S_IWUSR);
3987 module_param_named(no_uld, scsi_debug_no_uld, int, S_IRUGO);
3988 module_param_named(num_parts, scsi_debug_num_parts, int, S_IRUGO);
3989 module_param_named(num_tgts, scsi_debug_num_tgts, int, S_IRUGO | S_IWUSR);
3990 module_param_named(opt_blks, scsi_debug_opt_blks, int, S_IRUGO);
3991 module_param_named(opts, scsi_debug_opts, int, S_IRUGO | S_IWUSR);
3992 module_param_named(physblk_exp, scsi_debug_physblk_exp, int, S_IRUGO);
3993 module_param_named(ptype, scsi_debug_ptype, int, S_IRUGO | S_IWUSR);
3994 module_param_named(removable, scsi_debug_removable, bool, S_IRUGO | S_IWUSR);
3995 module_param_named(scsi_level, scsi_debug_scsi_level, int, S_IRUGO);
3996 module_param_named(sector_size, scsi_debug_sector_size, int, S_IRUGO);
3997 module_param_named(strict, scsi_debug_strict, bool, S_IRUGO | S_IWUSR);
3998 module_param_named(unmap_alignment, scsi_debug_unmap_alignment, int, S_IRUGO);
3999 module_param_named(unmap_granularity, scsi_debug_unmap_granularity, int, S_IRUGO);
4000 module_param_named(unmap_max_blocks, scsi_debug_unmap_max_blocks, int, S_IRUGO);
4001 module_param_named(unmap_max_desc, scsi_debug_unmap_max_desc, int, S_IRUGO);
4002 module_param_named(virtual_gb, scsi_debug_virtual_gb, int, S_IRUGO | S_IWUSR);
4003 module_param_named(vpd_use_hostno, scsi_debug_vpd_use_hostno, int,
4004 S_IRUGO | S_IWUSR);
4005 module_param_named(write_same_length, scsi_debug_write_same_length, int,
4006 S_IRUGO | S_IWUSR);
4007
4008 MODULE_AUTHOR("Eric Youngdale + Douglas Gilbert");
4009 MODULE_DESCRIPTION("SCSI debug adapter driver");
4010 MODULE_LICENSE("GPL");
4011 MODULE_VERSION(SCSI_DEBUG_VERSION);
4012
4013 MODULE_PARM_DESC(add_host, "0..127 hosts allowed(def=1)");
4014 MODULE_PARM_DESC(ato, "application tag ownership: 0=disk 1=host (def=1)");
4015 MODULE_PARM_DESC(clustering, "when set enables larger transfers (def=0)");
4016 MODULE_PARM_DESC(delay, "response delay (def=1 jiffy); 0:imm, -1,-2:tiny");
4017 MODULE_PARM_DESC(dev_size_mb, "size in MiB of ram shared by devs(def=8)");
4018 MODULE_PARM_DESC(dif, "data integrity field type: 0-3 (def=0)");
4019 MODULE_PARM_DESC(dix, "data integrity extensions mask (def=0)");
4020 MODULE_PARM_DESC(dsense, "use descriptor sense format(def=0 -> fixed)");
4021 MODULE_PARM_DESC(every_nth, "timeout every nth command(def=0)");
4022 MODULE_PARM_DESC(fake_rw, "fake reads/writes instead of copying (def=0)");
4023 MODULE_PARM_DESC(guard, "protection checksum: 0=crc, 1=ip (def=0)");
4024 MODULE_PARM_DESC(host_lock, "use host_lock around all commands (def=0)");
4025 MODULE_PARM_DESC(lbpu, "enable LBP, support UNMAP command (def=0)");
4026 MODULE_PARM_DESC(lbpws, "enable LBP, support WRITE SAME(16) with UNMAP bit (def=0)");
4027 MODULE_PARM_DESC(lbpws10, "enable LBP, support WRITE SAME(10) with UNMAP bit (def=0)");
4028 MODULE_PARM_DESC(lbprz, "unmapped blocks return 0 on read (def=1)");
4029 MODULE_PARM_DESC(lowest_aligned, "lowest aligned lba (def=0)");
4030 MODULE_PARM_DESC(max_luns, "number of LUNs per target to simulate(def=1)");
4031 MODULE_PARM_DESC(max_queue, "max number of queued commands (1 to max(def))");
4032 MODULE_PARM_DESC(ndelay, "response delay in nanoseconds (def=0 -> ignore)");
4033 MODULE_PARM_DESC(no_lun_0, "no LU number 0 (def=0 -> have lun 0)");
4034 MODULE_PARM_DESC(no_uld, "stop ULD (e.g. sd driver) attaching (def=0))");
4035 MODULE_PARM_DESC(num_parts, "number of partitions(def=0)");
4036 MODULE_PARM_DESC(num_tgts, "number of targets per host to simulate(def=1)");
4037 MODULE_PARM_DESC(opt_blks, "optimal transfer length in block (def=64)");
4038 MODULE_PARM_DESC(opts, "1->noise, 2->medium_err, 4->timeout, 8->recovered_err... (def=0)");
4039 MODULE_PARM_DESC(physblk_exp, "physical block exponent (def=0)");
4040 MODULE_PARM_DESC(ptype, "SCSI peripheral type(def=0[disk])");
4041 MODULE_PARM_DESC(removable, "claim to have removable media (def=0)");
4042 MODULE_PARM_DESC(scsi_level, "SCSI level to simulate(def=6[SPC-4])");
4043 MODULE_PARM_DESC(sector_size, "logical block size in bytes (def=512)");
4044 MODULE_PARM_DESC(strict, "stricter checks: reserved field in cdb (def=0)");
4045 MODULE_PARM_DESC(unmap_alignment, "lowest aligned thin provisioning lba (def=0)");
4046 MODULE_PARM_DESC(unmap_granularity, "thin provisioning granularity in blocks (def=1)");
4047 MODULE_PARM_DESC(unmap_max_blocks, "max # of blocks can be unmapped in one cmd (def=0xffffffff)");
4048 MODULE_PARM_DESC(unmap_max_desc, "max # of ranges that can be unmapped in one cmd (def=256)");
4049 MODULE_PARM_DESC(virtual_gb, "virtual gigabyte (GiB) size (def=0 -> use dev_size_mb)");
4050 MODULE_PARM_DESC(vpd_use_hostno, "0 -> dev ids ignore hostno (def=1 -> unique dev ids)");
4051 MODULE_PARM_DESC(write_same_length, "Maximum blocks per WRITE SAME cmd (def=0xffff)");
4052
4053 static char sdebug_info[256];
4054
4055 static const char * scsi_debug_info(struct Scsi_Host * shp)
4056 {
4057 sprintf(sdebug_info, "scsi_debug, version %s [%s], "
4058 "dev_size_mb=%d, opts=0x%x", SCSI_DEBUG_VERSION,
4059 scsi_debug_version_date, scsi_debug_dev_size_mb,
4060 scsi_debug_opts);
4061 return sdebug_info;
4062 }
4063
4064 /* 'echo <val> > /proc/scsi/scsi_debug/<host_id>' writes to opts */
4065 static int scsi_debug_write_info(struct Scsi_Host *host, char *buffer, int length)
4066 {
4067 char arr[16];
4068 int opts;
4069 int minLen = length > 15 ? 15 : length;
4070
4071 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
4072 return -EACCES;
4073 memcpy(arr, buffer, minLen);
4074 arr[minLen] = '\0';
4075 if (1 != sscanf(arr, "%d", &opts))
4076 return -EINVAL;
4077 scsi_debug_opts = opts;
4078 if (scsi_debug_every_nth != 0)
4079 atomic_set(&sdebug_cmnd_count, 0);
4080 return length;
4081 }
4082
4083 /* Output seen with 'cat /proc/scsi/scsi_debug/<host_id>'. It will be the
4084 * same for each scsi_debug host (if more than one). Some of the counters
4085 * output are not atomics so might be inaccurate in a busy system. */
4086 static int scsi_debug_show_info(struct seq_file *m, struct Scsi_Host *host)
4087 {
4088 int f, l;
4089 char b[32];
4090
4091 if (scsi_debug_every_nth > 0)
4092 snprintf(b, sizeof(b), " (curr:%d)",
4093 ((SCSI_DEBUG_OPT_RARE_TSF & scsi_debug_opts) ?
4094 atomic_read(&sdebug_a_tsf) :
4095 atomic_read(&sdebug_cmnd_count)));
4096 else
4097 b[0] = '\0';
4098
4099 seq_printf(m, "scsi_debug adapter driver, version %s [%s]\n"
4100 "num_tgts=%d, shared (ram) size=%d MB, opts=0x%x, "
4101 "every_nth=%d%s\n"
4102 "delay=%d, ndelay=%d, max_luns=%d, q_completions=%d\n"
4103 "sector_size=%d bytes, cylinders=%d, heads=%d, sectors=%d\n"
4104 "command aborts=%d; RESETs: device=%d, target=%d, bus=%d, "
4105 "host=%d\ndix_reads=%d dix_writes=%d dif_errors=%d "
4106 "usec_in_jiffy=%lu\n",
4107 SCSI_DEBUG_VERSION, scsi_debug_version_date,
4108 scsi_debug_num_tgts, scsi_debug_dev_size_mb, scsi_debug_opts,
4109 scsi_debug_every_nth, b, scsi_debug_delay, scsi_debug_ndelay,
4110 scsi_debug_max_luns, atomic_read(&sdebug_completions),
4111 scsi_debug_sector_size, sdebug_cylinders_per, sdebug_heads,
4112 sdebug_sectors_per, num_aborts, num_dev_resets,
4113 num_target_resets, num_bus_resets, num_host_resets,
4114 dix_reads, dix_writes, dif_errors, TICK_NSEC / 1000);
4115
4116 f = find_first_bit(queued_in_use_bm, scsi_debug_max_queue);
4117 if (f != scsi_debug_max_queue) {
4118 l = find_last_bit(queued_in_use_bm, scsi_debug_max_queue);
4119 seq_printf(m, " %s BUSY: first,last bits set: %d,%d\n",
4120 "queued_in_use_bm", f, l);
4121 }
4122 return 0;
4123 }
4124
4125 static ssize_t delay_show(struct device_driver *ddp, char *buf)
4126 {
4127 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_delay);
4128 }
4129 /* Returns -EBUSY if delay is being changed and commands are queued */
4130 static ssize_t delay_store(struct device_driver *ddp, const char *buf,
4131 size_t count)
4132 {
4133 int delay, res;
4134
4135 if ((count > 0) && (1 == sscanf(buf, "%d", &delay))) {
4136 res = count;
4137 if (scsi_debug_delay != delay) {
4138 unsigned long iflags;
4139 int k;
4140
4141 spin_lock_irqsave(&queued_arr_lock, iflags);
4142 k = find_first_bit(queued_in_use_bm,
4143 scsi_debug_max_queue);
4144 if (k != scsi_debug_max_queue)
4145 res = -EBUSY; /* have queued commands */
4146 else {
4147 scsi_debug_delay = delay;
4148 scsi_debug_ndelay = 0;
4149 }
4150 spin_unlock_irqrestore(&queued_arr_lock, iflags);
4151 }
4152 return res;
4153 }
4154 return -EINVAL;
4155 }
4156 static DRIVER_ATTR_RW(delay);
4157
4158 static ssize_t ndelay_show(struct device_driver *ddp, char *buf)
4159 {
4160 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_ndelay);
4161 }
4162 /* Returns -EBUSY if ndelay is being changed and commands are queued */
4163 /* If > 0 and accepted then scsi_debug_delay is set to DELAY_OVERRIDDEN */
4164 static ssize_t ndelay_store(struct device_driver *ddp, const char *buf,
4165 size_t count)
4166 {
4167 unsigned long iflags;
4168 int ndelay, res, k;
4169
4170 if ((count > 0) && (1 == sscanf(buf, "%d", &ndelay)) &&
4171 (ndelay >= 0) && (ndelay < 1000000000)) {
4172 res = count;
4173 if (scsi_debug_ndelay != ndelay) {
4174 spin_lock_irqsave(&queued_arr_lock, iflags);
4175 k = find_first_bit(queued_in_use_bm,
4176 scsi_debug_max_queue);
4177 if (k != scsi_debug_max_queue)
4178 res = -EBUSY; /* have queued commands */
4179 else {
4180 scsi_debug_ndelay = ndelay;
4181 scsi_debug_delay = ndelay ? DELAY_OVERRIDDEN
4182 : DEF_DELAY;
4183 }
4184 spin_unlock_irqrestore(&queued_arr_lock, iflags);
4185 }
4186 return res;
4187 }
4188 return -EINVAL;
4189 }
4190 static DRIVER_ATTR_RW(ndelay);
4191
4192 static ssize_t opts_show(struct device_driver *ddp, char *buf)
4193 {
4194 return scnprintf(buf, PAGE_SIZE, "0x%x\n", scsi_debug_opts);
4195 }
4196
4197 static ssize_t opts_store(struct device_driver *ddp, const char *buf,
4198 size_t count)
4199 {
4200 int opts;
4201 char work[20];
4202
4203 if (1 == sscanf(buf, "%10s", work)) {
4204 if (0 == strncasecmp(work,"0x", 2)) {
4205 if (1 == sscanf(&work[2], "%x", &opts))
4206 goto opts_done;
4207 } else {
4208 if (1 == sscanf(work, "%d", &opts))
4209 goto opts_done;
4210 }
4211 }
4212 return -EINVAL;
4213 opts_done:
4214 scsi_debug_opts = opts;
4215 if (SCSI_DEBUG_OPT_RECOVERED_ERR & opts)
4216 sdebug_any_injecting_opt = true;
4217 else if (SCSI_DEBUG_OPT_TRANSPORT_ERR & opts)
4218 sdebug_any_injecting_opt = true;
4219 else if (SCSI_DEBUG_OPT_DIF_ERR & opts)
4220 sdebug_any_injecting_opt = true;
4221 else if (SCSI_DEBUG_OPT_DIX_ERR & opts)
4222 sdebug_any_injecting_opt = true;
4223 else if (SCSI_DEBUG_OPT_SHORT_TRANSFER & opts)
4224 sdebug_any_injecting_opt = true;
4225 atomic_set(&sdebug_cmnd_count, 0);
4226 atomic_set(&sdebug_a_tsf, 0);
4227 return count;
4228 }
4229 static DRIVER_ATTR_RW(opts);
4230
4231 static ssize_t ptype_show(struct device_driver *ddp, char *buf)
4232 {
4233 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_ptype);
4234 }
4235 static ssize_t ptype_store(struct device_driver *ddp, const char *buf,
4236 size_t count)
4237 {
4238 int n;
4239
4240 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
4241 scsi_debug_ptype = n;
4242 return count;
4243 }
4244 return -EINVAL;
4245 }
4246 static DRIVER_ATTR_RW(ptype);
4247
4248 static ssize_t dsense_show(struct device_driver *ddp, char *buf)
4249 {
4250 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dsense);
4251 }
4252 static ssize_t dsense_store(struct device_driver *ddp, const char *buf,
4253 size_t count)
4254 {
4255 int n;
4256
4257 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
4258 scsi_debug_dsense = n;
4259 return count;
4260 }
4261 return -EINVAL;
4262 }
4263 static DRIVER_ATTR_RW(dsense);
4264
4265 static ssize_t fake_rw_show(struct device_driver *ddp, char *buf)
4266 {
4267 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_fake_rw);
4268 }
4269 static ssize_t fake_rw_store(struct device_driver *ddp, const char *buf,
4270 size_t count)
4271 {
4272 int n;
4273
4274 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
4275 n = (n > 0);
4276 scsi_debug_fake_rw = (scsi_debug_fake_rw > 0);
4277 if (scsi_debug_fake_rw != n) {
4278 if ((0 == n) && (NULL == fake_storep)) {
4279 unsigned long sz =
4280 (unsigned long)scsi_debug_dev_size_mb *
4281 1048576;
4282
4283 fake_storep = vmalloc(sz);
4284 if (NULL == fake_storep) {
4285 pr_err("%s: out of memory, 9\n",
4286 __func__);
4287 return -ENOMEM;
4288 }
4289 memset(fake_storep, 0, sz);
4290 }
4291 scsi_debug_fake_rw = n;
4292 }
4293 return count;
4294 }
4295 return -EINVAL;
4296 }
4297 static DRIVER_ATTR_RW(fake_rw);
4298
4299 static ssize_t no_lun_0_show(struct device_driver *ddp, char *buf)
4300 {
4301 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_no_lun_0);
4302 }
4303 static ssize_t no_lun_0_store(struct device_driver *ddp, const char *buf,
4304 size_t count)
4305 {
4306 int n;
4307
4308 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
4309 scsi_debug_no_lun_0 = n;
4310 return count;
4311 }
4312 return -EINVAL;
4313 }
4314 static DRIVER_ATTR_RW(no_lun_0);
4315
4316 static ssize_t num_tgts_show(struct device_driver *ddp, char *buf)
4317 {
4318 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_num_tgts);
4319 }
4320 static ssize_t num_tgts_store(struct device_driver *ddp, const char *buf,
4321 size_t count)
4322 {
4323 int n;
4324
4325 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
4326 scsi_debug_num_tgts = n;
4327 sdebug_max_tgts_luns();
4328 return count;
4329 }
4330 return -EINVAL;
4331 }
4332 static DRIVER_ATTR_RW(num_tgts);
4333
4334 static ssize_t dev_size_mb_show(struct device_driver *ddp, char *buf)
4335 {
4336 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dev_size_mb);
4337 }
4338 static DRIVER_ATTR_RO(dev_size_mb);
4339
4340 static ssize_t num_parts_show(struct device_driver *ddp, char *buf)
4341 {
4342 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_num_parts);
4343 }
4344 static DRIVER_ATTR_RO(num_parts);
4345
4346 static ssize_t every_nth_show(struct device_driver *ddp, char *buf)
4347 {
4348 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_every_nth);
4349 }
4350 static ssize_t every_nth_store(struct device_driver *ddp, const char *buf,
4351 size_t count)
4352 {
4353 int nth;
4354
4355 if ((count > 0) && (1 == sscanf(buf, "%d", &nth))) {
4356 scsi_debug_every_nth = nth;
4357 atomic_set(&sdebug_cmnd_count, 0);
4358 return count;
4359 }
4360 return -EINVAL;
4361 }
4362 static DRIVER_ATTR_RW(every_nth);
4363
4364 static ssize_t max_luns_show(struct device_driver *ddp, char *buf)
4365 {
4366 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_max_luns);
4367 }
4368 static ssize_t max_luns_store(struct device_driver *ddp, const char *buf,
4369 size_t count)
4370 {
4371 int n;
4372
4373 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
4374 scsi_debug_max_luns = n;
4375 sdebug_max_tgts_luns();
4376 return count;
4377 }
4378 return -EINVAL;
4379 }
4380 static DRIVER_ATTR_RW(max_luns);
4381
4382 static ssize_t max_queue_show(struct device_driver *ddp, char *buf)
4383 {
4384 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_max_queue);
4385 }
4386 /* N.B. max_queue can be changed while there are queued commands. In flight
4387 * commands beyond the new max_queue will be completed. */
4388 static ssize_t max_queue_store(struct device_driver *ddp, const char *buf,
4389 size_t count)
4390 {
4391 unsigned long iflags;
4392 int n, k;
4393
4394 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n > 0) &&
4395 (n <= SCSI_DEBUG_CANQUEUE)) {
4396 spin_lock_irqsave(&queued_arr_lock, iflags);
4397 k = find_last_bit(queued_in_use_bm, SCSI_DEBUG_CANQUEUE);
4398 scsi_debug_max_queue = n;
4399 if (SCSI_DEBUG_CANQUEUE == k)
4400 atomic_set(&retired_max_queue, 0);
4401 else if (k >= n)
4402 atomic_set(&retired_max_queue, k + 1);
4403 else
4404 atomic_set(&retired_max_queue, 0);
4405 spin_unlock_irqrestore(&queued_arr_lock, iflags);
4406 return count;
4407 }
4408 return -EINVAL;
4409 }
4410 static DRIVER_ATTR_RW(max_queue);
4411
4412 static ssize_t no_uld_show(struct device_driver *ddp, char *buf)
4413 {
4414 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_no_uld);
4415 }
4416 static DRIVER_ATTR_RO(no_uld);
4417
4418 static ssize_t scsi_level_show(struct device_driver *ddp, char *buf)
4419 {
4420 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_scsi_level);
4421 }
4422 static DRIVER_ATTR_RO(scsi_level);
4423
4424 static ssize_t virtual_gb_show(struct device_driver *ddp, char *buf)
4425 {
4426 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_virtual_gb);
4427 }
4428 static ssize_t virtual_gb_store(struct device_driver *ddp, const char *buf,
4429 size_t count)
4430 {
4431 int n;
4432 bool changed;
4433
4434 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
4435 changed = (scsi_debug_virtual_gb != n);
4436 scsi_debug_virtual_gb = n;
4437 sdebug_capacity = get_sdebug_capacity();
4438 if (changed) {
4439 struct sdebug_host_info *sdhp;
4440 struct sdebug_dev_info *dp;
4441
4442 spin_lock(&sdebug_host_list_lock);
4443 list_for_each_entry(sdhp, &sdebug_host_list,
4444 host_list) {
4445 list_for_each_entry(dp, &sdhp->dev_info_list,
4446 dev_list) {
4447 set_bit(SDEBUG_UA_CAPACITY_CHANGED,
4448 dp->uas_bm);
4449 }
4450 }
4451 spin_unlock(&sdebug_host_list_lock);
4452 }
4453 return count;
4454 }
4455 return -EINVAL;
4456 }
4457 static DRIVER_ATTR_RW(virtual_gb);
4458
4459 static ssize_t add_host_show(struct device_driver *ddp, char *buf)
4460 {
4461 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_add_host);
4462 }
4463
4464 static ssize_t add_host_store(struct device_driver *ddp, const char *buf,
4465 size_t count)
4466 {
4467 int delta_hosts;
4468
4469 if (sscanf(buf, "%d", &delta_hosts) != 1)
4470 return -EINVAL;
4471 if (delta_hosts > 0) {
4472 do {
4473 sdebug_add_adapter();
4474 } while (--delta_hosts);
4475 } else if (delta_hosts < 0) {
4476 do {
4477 sdebug_remove_adapter();
4478 } while (++delta_hosts);
4479 }
4480 return count;
4481 }
4482 static DRIVER_ATTR_RW(add_host);
4483
4484 static ssize_t vpd_use_hostno_show(struct device_driver *ddp, char *buf)
4485 {
4486 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_vpd_use_hostno);
4487 }
4488 static ssize_t vpd_use_hostno_store(struct device_driver *ddp, const char *buf,
4489 size_t count)
4490 {
4491 int n;
4492
4493 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
4494 scsi_debug_vpd_use_hostno = n;
4495 return count;
4496 }
4497 return -EINVAL;
4498 }
4499 static DRIVER_ATTR_RW(vpd_use_hostno);
4500
4501 static ssize_t sector_size_show(struct device_driver *ddp, char *buf)
4502 {
4503 return scnprintf(buf, PAGE_SIZE, "%u\n", scsi_debug_sector_size);
4504 }
4505 static DRIVER_ATTR_RO(sector_size);
4506
4507 static ssize_t dix_show(struct device_driver *ddp, char *buf)
4508 {
4509 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dix);
4510 }
4511 static DRIVER_ATTR_RO(dix);
4512
4513 static ssize_t dif_show(struct device_driver *ddp, char *buf)
4514 {
4515 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dif);
4516 }
4517 static DRIVER_ATTR_RO(dif);
4518
4519 static ssize_t guard_show(struct device_driver *ddp, char *buf)
4520 {
4521 return scnprintf(buf, PAGE_SIZE, "%u\n", scsi_debug_guard);
4522 }
4523 static DRIVER_ATTR_RO(guard);
4524
4525 static ssize_t ato_show(struct device_driver *ddp, char *buf)
4526 {
4527 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_ato);
4528 }
4529 static DRIVER_ATTR_RO(ato);
4530
4531 static ssize_t map_show(struct device_driver *ddp, char *buf)
4532 {
4533 ssize_t count;
4534
4535 if (!scsi_debug_lbp())
4536 return scnprintf(buf, PAGE_SIZE, "0-%u\n",
4537 sdebug_store_sectors);
4538
4539 count = bitmap_scnlistprintf(buf, PAGE_SIZE, map_storep, map_size);
4540
4541 buf[count++] = '\n';
4542 buf[count++] = 0;
4543
4544 return count;
4545 }
4546 static DRIVER_ATTR_RO(map);
4547
4548 static ssize_t removable_show(struct device_driver *ddp, char *buf)
4549 {
4550 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_removable ? 1 : 0);
4551 }
4552 static ssize_t removable_store(struct device_driver *ddp, const char *buf,
4553 size_t count)
4554 {
4555 int n;
4556
4557 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
4558 scsi_debug_removable = (n > 0);
4559 return count;
4560 }
4561 return -EINVAL;
4562 }
4563 static DRIVER_ATTR_RW(removable);
4564
4565 static ssize_t host_lock_show(struct device_driver *ddp, char *buf)
4566 {
4567 return scnprintf(buf, PAGE_SIZE, "%d\n", !!scsi_debug_host_lock);
4568 }
4569 /* Returns -EBUSY if host_lock is being changed and commands are queued */
4570 static ssize_t host_lock_store(struct device_driver *ddp, const char *buf,
4571 size_t count)
4572 {
4573 int n, res;
4574
4575 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
4576 bool new_host_lock = (n > 0);
4577
4578 res = count;
4579 if (new_host_lock != scsi_debug_host_lock) {
4580 unsigned long iflags;
4581 int k;
4582
4583 spin_lock_irqsave(&queued_arr_lock, iflags);
4584 k = find_first_bit(queued_in_use_bm,
4585 scsi_debug_max_queue);
4586 if (k != scsi_debug_max_queue)
4587 res = -EBUSY; /* have queued commands */
4588 else
4589 scsi_debug_host_lock = new_host_lock;
4590 spin_unlock_irqrestore(&queued_arr_lock, iflags);
4591 }
4592 return res;
4593 }
4594 return -EINVAL;
4595 }
4596 static DRIVER_ATTR_RW(host_lock);
4597
4598 static ssize_t strict_show(struct device_driver *ddp, char *buf)
4599 {
4600 return scnprintf(buf, PAGE_SIZE, "%d\n", !!scsi_debug_strict);
4601 }
4602 static ssize_t strict_store(struct device_driver *ddp, const char *buf,
4603 size_t count)
4604 {
4605 int n;
4606
4607 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
4608 scsi_debug_strict = (n > 0);
4609 return count;
4610 }
4611 return -EINVAL;
4612 }
4613 static DRIVER_ATTR_RW(strict);
4614
4615
4616 /* Note: The following array creates attribute files in the
4617 /sys/bus/pseudo/drivers/scsi_debug directory. The advantage of these
4618 files (over those found in the /sys/module/scsi_debug/parameters
4619 directory) is that auxiliary actions can be triggered when an attribute
4620 is changed. For example see: sdebug_add_host_store() above.
4621 */
4622
4623 static struct attribute *sdebug_drv_attrs[] = {
4624 &driver_attr_delay.attr,
4625 &driver_attr_opts.attr,
4626 &driver_attr_ptype.attr,
4627 &driver_attr_dsense.attr,
4628 &driver_attr_fake_rw.attr,
4629 &driver_attr_no_lun_0.attr,
4630 &driver_attr_num_tgts.attr,
4631 &driver_attr_dev_size_mb.attr,
4632 &driver_attr_num_parts.attr,
4633 &driver_attr_every_nth.attr,
4634 &driver_attr_max_luns.attr,
4635 &driver_attr_max_queue.attr,
4636 &driver_attr_no_uld.attr,
4637 &driver_attr_scsi_level.attr,
4638 &driver_attr_virtual_gb.attr,
4639 &driver_attr_add_host.attr,
4640 &driver_attr_vpd_use_hostno.attr,
4641 &driver_attr_sector_size.attr,
4642 &driver_attr_dix.attr,
4643 &driver_attr_dif.attr,
4644 &driver_attr_guard.attr,
4645 &driver_attr_ato.attr,
4646 &driver_attr_map.attr,
4647 &driver_attr_removable.attr,
4648 &driver_attr_host_lock.attr,
4649 &driver_attr_ndelay.attr,
4650 &driver_attr_strict.attr,
4651 NULL,
4652 };
4653 ATTRIBUTE_GROUPS(sdebug_drv);
4654
4655 static struct device *pseudo_primary;
4656
4657 static int __init scsi_debug_init(void)
4658 {
4659 unsigned long sz;
4660 int host_to_add;
4661 int k;
4662 int ret;
4663
4664 atomic_set(&sdebug_cmnd_count, 0);
4665 atomic_set(&sdebug_completions, 0);
4666 atomic_set(&retired_max_queue, 0);
4667
4668 if (scsi_debug_ndelay >= 1000000000) {
4669 pr_warn("%s: ndelay must be less than 1 second, ignored\n",
4670 __func__);
4671 scsi_debug_ndelay = 0;
4672 } else if (scsi_debug_ndelay > 0)
4673 scsi_debug_delay = DELAY_OVERRIDDEN;
4674
4675 switch (scsi_debug_sector_size) {
4676 case 512:
4677 case 1024:
4678 case 2048:
4679 case 4096:
4680 break;
4681 default:
4682 pr_err("%s: invalid sector_size %d\n", __func__,
4683 scsi_debug_sector_size);
4684 return -EINVAL;
4685 }
4686
4687 switch (scsi_debug_dif) {
4688
4689 case SD_DIF_TYPE0_PROTECTION:
4690 case SD_DIF_TYPE1_PROTECTION:
4691 case SD_DIF_TYPE2_PROTECTION:
4692 case SD_DIF_TYPE3_PROTECTION:
4693 break;
4694
4695 default:
4696 pr_err("%s: dif must be 0, 1, 2 or 3\n", __func__);
4697 return -EINVAL;
4698 }
4699
4700 if (scsi_debug_guard > 1) {
4701 pr_err("%s: guard must be 0 or 1\n", __func__);
4702 return -EINVAL;
4703 }
4704
4705 if (scsi_debug_ato > 1) {
4706 pr_err("%s: ato must be 0 or 1\n", __func__);
4707 return -EINVAL;
4708 }
4709
4710 if (scsi_debug_physblk_exp > 15) {
4711 pr_err("%s: invalid physblk_exp %u\n", __func__,
4712 scsi_debug_physblk_exp);
4713 return -EINVAL;
4714 }
4715
4716 if (scsi_debug_lowest_aligned > 0x3fff) {
4717 pr_err("%s: lowest_aligned too big: %u\n", __func__,
4718 scsi_debug_lowest_aligned);
4719 return -EINVAL;
4720 }
4721
4722 if (scsi_debug_dev_size_mb < 1)
4723 scsi_debug_dev_size_mb = 1; /* force minimum 1 MB ramdisk */
4724 sz = (unsigned long)scsi_debug_dev_size_mb * 1048576;
4725 sdebug_store_sectors = sz / scsi_debug_sector_size;
4726 sdebug_capacity = get_sdebug_capacity();
4727
4728 /* play around with geometry, don't waste too much on track 0 */
4729 sdebug_heads = 8;
4730 sdebug_sectors_per = 32;
4731 if (scsi_debug_dev_size_mb >= 16)
4732 sdebug_heads = 32;
4733 else if (scsi_debug_dev_size_mb >= 256)
4734 sdebug_heads = 64;
4735 sdebug_cylinders_per = (unsigned long)sdebug_capacity /
4736 (sdebug_sectors_per * sdebug_heads);
4737 if (sdebug_cylinders_per >= 1024) {
4738 /* other LLDs do this; implies >= 1GB ram disk ... */
4739 sdebug_heads = 255;
4740 sdebug_sectors_per = 63;
4741 sdebug_cylinders_per = (unsigned long)sdebug_capacity /
4742 (sdebug_sectors_per * sdebug_heads);
4743 }
4744
4745 if (0 == scsi_debug_fake_rw) {
4746 fake_storep = vmalloc(sz);
4747 if (NULL == fake_storep) {
4748 pr_err("%s: out of memory, 1\n", __func__);
4749 return -ENOMEM;
4750 }
4751 memset(fake_storep, 0, sz);
4752 if (scsi_debug_num_parts > 0)
4753 sdebug_build_parts(fake_storep, sz);
4754 }
4755
4756 if (scsi_debug_dix) {
4757 int dif_size;
4758
4759 dif_size = sdebug_store_sectors * sizeof(struct sd_dif_tuple);
4760 dif_storep = vmalloc(dif_size);
4761
4762 pr_err("%s: dif_storep %u bytes @ %p\n", __func__, dif_size,
4763 dif_storep);
4764
4765 if (dif_storep == NULL) {
4766 pr_err("%s: out of mem. (DIX)\n", __func__);
4767 ret = -ENOMEM;
4768 goto free_vm;
4769 }
4770
4771 memset(dif_storep, 0xff, dif_size);
4772 }
4773
4774 /* Logical Block Provisioning */
4775 if (scsi_debug_lbp()) {
4776 scsi_debug_unmap_max_blocks =
4777 clamp(scsi_debug_unmap_max_blocks, 0U, 0xffffffffU);
4778
4779 scsi_debug_unmap_max_desc =
4780 clamp(scsi_debug_unmap_max_desc, 0U, 256U);
4781
4782 scsi_debug_unmap_granularity =
4783 clamp(scsi_debug_unmap_granularity, 1U, 0xffffffffU);
4784
4785 if (scsi_debug_unmap_alignment &&
4786 scsi_debug_unmap_granularity <=
4787 scsi_debug_unmap_alignment) {
4788 pr_err("%s: ERR: unmap_granularity <= unmap_alignment\n",
4789 __func__);
4790 return -EINVAL;
4791 }
4792
4793 map_size = lba_to_map_index(sdebug_store_sectors - 1) + 1;
4794 map_storep = vmalloc(BITS_TO_LONGS(map_size) * sizeof(long));
4795
4796 pr_info("%s: %lu provisioning blocks\n", __func__, map_size);
4797
4798 if (map_storep == NULL) {
4799 pr_err("%s: out of mem. (MAP)\n", __func__);
4800 ret = -ENOMEM;
4801 goto free_vm;
4802 }
4803
4804 bitmap_zero(map_storep, map_size);
4805
4806 /* Map first 1KB for partition table */
4807 if (scsi_debug_num_parts)
4808 map_region(0, 2);
4809 }
4810
4811 pseudo_primary = root_device_register("pseudo_0");
4812 if (IS_ERR(pseudo_primary)) {
4813 pr_warn("%s: root_device_register() error\n", __func__);
4814 ret = PTR_ERR(pseudo_primary);
4815 goto free_vm;
4816 }
4817 ret = bus_register(&pseudo_lld_bus);
4818 if (ret < 0) {
4819 pr_warn("%s: bus_register error: %d\n", __func__, ret);
4820 goto dev_unreg;
4821 }
4822 ret = driver_register(&sdebug_driverfs_driver);
4823 if (ret < 0) {
4824 pr_warn("%s: driver_register error: %d\n", __func__, ret);
4825 goto bus_unreg;
4826 }
4827
4828 host_to_add = scsi_debug_add_host;
4829 scsi_debug_add_host = 0;
4830
4831 for (k = 0; k < host_to_add; k++) {
4832 if (sdebug_add_adapter()) {
4833 pr_err("%s: sdebug_add_adapter failed k=%d\n",
4834 __func__, k);
4835 break;
4836 }
4837 }
4838
4839 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) {
4840 pr_info("%s: built %d host(s)\n", __func__,
4841 scsi_debug_add_host);
4842 }
4843 return 0;
4844
4845 bus_unreg:
4846 bus_unregister(&pseudo_lld_bus);
4847 dev_unreg:
4848 root_device_unregister(pseudo_primary);
4849 free_vm:
4850 if (map_storep)
4851 vfree(map_storep);
4852 if (dif_storep)
4853 vfree(dif_storep);
4854 vfree(fake_storep);
4855
4856 return ret;
4857 }
4858
4859 static void __exit scsi_debug_exit(void)
4860 {
4861 int k = scsi_debug_add_host;
4862
4863 stop_all_queued();
4864 free_all_queued();
4865 for (; k; k--)
4866 sdebug_remove_adapter();
4867 driver_unregister(&sdebug_driverfs_driver);
4868 bus_unregister(&pseudo_lld_bus);
4869 root_device_unregister(pseudo_primary);
4870
4871 if (dif_storep)
4872 vfree(dif_storep);
4873
4874 vfree(fake_storep);
4875 }
4876
4877 device_initcall(scsi_debug_init);
4878 module_exit(scsi_debug_exit);
4879
4880 static void sdebug_release_adapter(struct device * dev)
4881 {
4882 struct sdebug_host_info *sdbg_host;
4883
4884 sdbg_host = to_sdebug_host(dev);
4885 kfree(sdbg_host);
4886 }
4887
4888 static int sdebug_add_adapter(void)
4889 {
4890 int k, devs_per_host;
4891 int error = 0;
4892 struct sdebug_host_info *sdbg_host;
4893 struct sdebug_dev_info *sdbg_devinfo, *tmp;
4894
4895 sdbg_host = kzalloc(sizeof(*sdbg_host),GFP_KERNEL);
4896 if (NULL == sdbg_host) {
4897 printk(KERN_ERR "%s: out of memory at line %d\n",
4898 __func__, __LINE__);
4899 return -ENOMEM;
4900 }
4901
4902 INIT_LIST_HEAD(&sdbg_host->dev_info_list);
4903
4904 devs_per_host = scsi_debug_num_tgts * scsi_debug_max_luns;
4905 for (k = 0; k < devs_per_host; k++) {
4906 sdbg_devinfo = sdebug_device_create(sdbg_host, GFP_KERNEL);
4907 if (!sdbg_devinfo) {
4908 printk(KERN_ERR "%s: out of memory at line %d\n",
4909 __func__, __LINE__);
4910 error = -ENOMEM;
4911 goto clean;
4912 }
4913 }
4914
4915 spin_lock(&sdebug_host_list_lock);
4916 list_add_tail(&sdbg_host->host_list, &sdebug_host_list);
4917 spin_unlock(&sdebug_host_list_lock);
4918
4919 sdbg_host->dev.bus = &pseudo_lld_bus;
4920 sdbg_host->dev.parent = pseudo_primary;
4921 sdbg_host->dev.release = &sdebug_release_adapter;
4922 dev_set_name(&sdbg_host->dev, "adapter%d", scsi_debug_add_host);
4923
4924 error = device_register(&sdbg_host->dev);
4925
4926 if (error)
4927 goto clean;
4928
4929 ++scsi_debug_add_host;
4930 return error;
4931
4932 clean:
4933 list_for_each_entry_safe(sdbg_devinfo, tmp, &sdbg_host->dev_info_list,
4934 dev_list) {
4935 list_del(&sdbg_devinfo->dev_list);
4936 kfree(sdbg_devinfo);
4937 }
4938
4939 kfree(sdbg_host);
4940 return error;
4941 }
4942
4943 static void sdebug_remove_adapter(void)
4944 {
4945 struct sdebug_host_info * sdbg_host = NULL;
4946
4947 spin_lock(&sdebug_host_list_lock);
4948 if (!list_empty(&sdebug_host_list)) {
4949 sdbg_host = list_entry(sdebug_host_list.prev,
4950 struct sdebug_host_info, host_list);
4951 list_del(&sdbg_host->host_list);
4952 }
4953 spin_unlock(&sdebug_host_list_lock);
4954
4955 if (!sdbg_host)
4956 return;
4957
4958 device_unregister(&sdbg_host->dev);
4959 --scsi_debug_add_host;
4960 }
4961
4962 static int
4963 sdebug_change_qdepth(struct scsi_device *sdev, int qdepth)
4964 {
4965 int num_in_q = 0;
4966 unsigned long iflags;
4967 struct sdebug_dev_info *devip;
4968
4969 spin_lock_irqsave(&queued_arr_lock, iflags);
4970 devip = (struct sdebug_dev_info *)sdev->hostdata;
4971 if (NULL == devip) {
4972 spin_unlock_irqrestore(&queued_arr_lock, iflags);
4973 return -ENODEV;
4974 }
4975 num_in_q = atomic_read(&devip->num_in_q);
4976 spin_unlock_irqrestore(&queued_arr_lock, iflags);
4977
4978 if (qdepth < 1)
4979 qdepth = 1;
4980 /* allow to exceed max host queued_arr elements for testing */
4981 if (qdepth > SCSI_DEBUG_CANQUEUE + 10)
4982 qdepth = SCSI_DEBUG_CANQUEUE + 10;
4983 scsi_change_queue_depth(sdev, qdepth);
4984
4985 if (SCSI_DEBUG_OPT_Q_NOISE & scsi_debug_opts) {
4986 sdev_printk(KERN_INFO, sdev,
4987 "%s: qdepth=%d, num_in_q=%d\n",
4988 __func__, qdepth, num_in_q);
4989 }
4990 return sdev->queue_depth;
4991 }
4992
4993 static int
4994 check_inject(struct scsi_cmnd *scp)
4995 {
4996 struct sdebug_scmd_extra_t *ep = scsi_cmd_priv(scp);
4997
4998 memset(ep, 0, sizeof(struct sdebug_scmd_extra_t));
4999
5000 if (atomic_inc_return(&sdebug_cmnd_count) >=
5001 abs(scsi_debug_every_nth)) {
5002 atomic_set(&sdebug_cmnd_count, 0);
5003 if (scsi_debug_every_nth < -1)
5004 scsi_debug_every_nth = -1;
5005 if (SCSI_DEBUG_OPT_TIMEOUT & scsi_debug_opts)
5006 return 1; /* ignore command causing timeout */
5007 else if (SCSI_DEBUG_OPT_MAC_TIMEOUT & scsi_debug_opts &&
5008 scsi_medium_access_command(scp))
5009 return 1; /* time out reads and writes */
5010 if (sdebug_any_injecting_opt) {
5011 int opts = scsi_debug_opts;
5012
5013 if (SCSI_DEBUG_OPT_RECOVERED_ERR & opts)
5014 ep->inj_recovered = true;
5015 else if (SCSI_DEBUG_OPT_TRANSPORT_ERR & opts)
5016 ep->inj_transport = true;
5017 else if (SCSI_DEBUG_OPT_DIF_ERR & opts)
5018 ep->inj_dif = true;
5019 else if (SCSI_DEBUG_OPT_DIX_ERR & opts)
5020 ep->inj_dix = true;
5021 else if (SCSI_DEBUG_OPT_SHORT_TRANSFER & opts)
5022 ep->inj_short = true;
5023 }
5024 }
5025 return 0;
5026 }
5027
5028 static int
5029 scsi_debug_queuecommand(struct scsi_cmnd *scp)
5030 {
5031 u8 sdeb_i;
5032 struct scsi_device *sdp = scp->device;
5033 const struct opcode_info_t *oip;
5034 const struct opcode_info_t *r_oip;
5035 struct sdebug_dev_info *devip;
5036 u8 *cmd = scp->cmnd;
5037 int (*r_pfp)(struct scsi_cmnd *, struct sdebug_dev_info *);
5038 int k, na;
5039 int errsts = 0;
5040 int errsts_no_connect = DID_NO_CONNECT << 16;
5041 u32 flags;
5042 u16 sa;
5043 u8 opcode = cmd[0];
5044 bool has_wlun_rl;
5045 bool debug = !!(SCSI_DEBUG_OPT_NOISE & scsi_debug_opts);
5046
5047 scsi_set_resid(scp, 0);
5048 if (debug && !(SCSI_DEBUG_OPT_NO_CDB_NOISE & scsi_debug_opts)) {
5049 char b[120];
5050 int n, len, sb;
5051
5052 len = scp->cmd_len;
5053 sb = (int)sizeof(b);
5054 if (len > 32)
5055 strcpy(b, "too long, over 32 bytes");
5056 else {
5057 for (k = 0, n = 0; k < len && n < sb; ++k)
5058 n += scnprintf(b + n, sb - n, "%02x ",
5059 (u32)cmd[k]);
5060 }
5061 sdev_printk(KERN_INFO, sdp, "%s: cmd %s\n", my_name, b);
5062 }
5063 has_wlun_rl = (sdp->lun == SAM2_WLUN_REPORT_LUNS);
5064 if ((sdp->lun >= scsi_debug_max_luns) && !has_wlun_rl)
5065 return schedule_resp(scp, NULL, errsts_no_connect, 0);
5066
5067 sdeb_i = opcode_ind_arr[opcode]; /* fully mapped */
5068 oip = &opcode_info_arr[sdeb_i]; /* safe if table consistent */
5069 devip = (struct sdebug_dev_info *)sdp->hostdata;
5070 if (!devip) {
5071 devip = devInfoReg(sdp);
5072 if (NULL == devip)
5073 return schedule_resp(scp, NULL, errsts_no_connect, 0);
5074 }
5075 na = oip->num_attached;
5076 r_pfp = oip->pfp;
5077 if (na) { /* multiple commands with this opcode */
5078 r_oip = oip;
5079 if (FF_SA & r_oip->flags) {
5080 if (F_SA_LOW & oip->flags)
5081 sa = 0x1f & cmd[1];
5082 else
5083 sa = get_unaligned_be16(cmd + 8);
5084 for (k = 0; k <= na; oip = r_oip->arrp + k++) {
5085 if (opcode == oip->opcode && sa == oip->sa)
5086 break;
5087 }
5088 } else { /* since no service action only check opcode */
5089 for (k = 0; k <= na; oip = r_oip->arrp + k++) {
5090 if (opcode == oip->opcode)
5091 break;
5092 }
5093 }
5094 if (k > na) {
5095 if (F_SA_LOW & r_oip->flags)
5096 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 4);
5097 else if (F_SA_HIGH & r_oip->flags)
5098 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 8, 7);
5099 else
5100 mk_sense_invalid_opcode(scp);
5101 goto check_cond;
5102 }
5103 } /* else (when na==0) we assume the oip is a match */
5104 flags = oip->flags;
5105 if (F_INV_OP & flags) {
5106 mk_sense_invalid_opcode(scp);
5107 goto check_cond;
5108 }
5109 if (has_wlun_rl && !(F_RL_WLUN_OK & flags)) {
5110 if (debug)
5111 sdev_printk(KERN_INFO, sdp, "scsi_debug: Opcode: "
5112 "0x%x not supported for wlun\n", opcode);
5113 mk_sense_invalid_opcode(scp);
5114 goto check_cond;
5115 }
5116 if (scsi_debug_strict) { /* check cdb against mask */
5117 u8 rem;
5118 int j;
5119
5120 for (k = 1; k < oip->len_mask[0] && k < 16; ++k) {
5121 rem = ~oip->len_mask[k] & cmd[k];
5122 if (rem) {
5123 for (j = 7; j >= 0; --j, rem <<= 1) {
5124 if (0x80 & rem)
5125 break;
5126 }
5127 mk_sense_invalid_fld(scp, SDEB_IN_CDB, k, j);
5128 goto check_cond;
5129 }
5130 }
5131 }
5132 if (!(F_SKIP_UA & flags) &&
5133 SDEBUG_NUM_UAS != find_first_bit(devip->uas_bm, SDEBUG_NUM_UAS)) {
5134 errsts = check_readiness(scp, UAS_ONLY, devip);
5135 if (errsts)
5136 goto check_cond;
5137 }
5138 if ((F_M_ACCESS & flags) && devip->stopped) {
5139 mk_sense_buffer(scp, NOT_READY, LOGICAL_UNIT_NOT_READY, 0x2);
5140 if (debug)
5141 sdev_printk(KERN_INFO, sdp, "%s reports: Not ready: "
5142 "%s\n", my_name, "initializing command "
5143 "required");
5144 errsts = check_condition_result;
5145 goto fini;
5146 }
5147 if (scsi_debug_fake_rw && (F_FAKE_RW & flags))
5148 goto fini;
5149 if (scsi_debug_every_nth) {
5150 if (check_inject(scp))
5151 return 0; /* ignore command: make trouble */
5152 }
5153 if (oip->pfp) /* if this command has a resp_* function, call it */
5154 errsts = oip->pfp(scp, devip);
5155 else if (r_pfp) /* if leaf function ptr NULL, try the root's */
5156 errsts = r_pfp(scp, devip);
5157
5158 fini:
5159 return schedule_resp(scp, devip, errsts,
5160 ((F_DELAY_OVERR & flags) ? 0 : scsi_debug_delay));
5161 check_cond:
5162 return schedule_resp(scp, devip, check_condition_result, 0);
5163 }
5164
5165 static int
5166 sdebug_queuecommand_lock_or_not(struct Scsi_Host *shost, struct scsi_cmnd *cmd)
5167 {
5168 if (scsi_debug_host_lock) {
5169 unsigned long iflags;
5170 int rc;
5171
5172 spin_lock_irqsave(shost->host_lock, iflags);
5173 rc = scsi_debug_queuecommand(cmd);
5174 spin_unlock_irqrestore(shost->host_lock, iflags);
5175 return rc;
5176 } else
5177 return scsi_debug_queuecommand(cmd);
5178 }
5179
5180 static struct scsi_host_template sdebug_driver_template = {
5181 .show_info = scsi_debug_show_info,
5182 .write_info = scsi_debug_write_info,
5183 .proc_name = sdebug_proc_name,
5184 .name = "SCSI DEBUG",
5185 .info = scsi_debug_info,
5186 .slave_alloc = scsi_debug_slave_alloc,
5187 .slave_configure = scsi_debug_slave_configure,
5188 .slave_destroy = scsi_debug_slave_destroy,
5189 .ioctl = scsi_debug_ioctl,
5190 .queuecommand = sdebug_queuecommand_lock_or_not,
5191 .change_queue_depth = sdebug_change_qdepth,
5192 .eh_abort_handler = scsi_debug_abort,
5193 .eh_device_reset_handler = scsi_debug_device_reset,
5194 .eh_target_reset_handler = scsi_debug_target_reset,
5195 .eh_bus_reset_handler = scsi_debug_bus_reset,
5196 .eh_host_reset_handler = scsi_debug_host_reset,
5197 .can_queue = SCSI_DEBUG_CANQUEUE,
5198 .this_id = 7,
5199 .sg_tablesize = SCSI_MAX_SG_CHAIN_SEGMENTS,
5200 .cmd_per_lun = DEF_CMD_PER_LUN,
5201 .max_sectors = -1U,
5202 .use_clustering = DISABLE_CLUSTERING,
5203 .module = THIS_MODULE,
5204 .track_queue_depth = 1,
5205 .cmd_size = sizeof(struct sdebug_scmd_extra_t),
5206 };
5207
5208 static int sdebug_driver_probe(struct device * dev)
5209 {
5210 int error = 0;
5211 int opts;
5212 struct sdebug_host_info *sdbg_host;
5213 struct Scsi_Host *hpnt;
5214 int host_prot;
5215
5216 sdbg_host = to_sdebug_host(dev);
5217
5218 sdebug_driver_template.can_queue = scsi_debug_max_queue;
5219 if (scsi_debug_clustering)
5220 sdebug_driver_template.use_clustering = ENABLE_CLUSTERING;
5221 hpnt = scsi_host_alloc(&sdebug_driver_template, sizeof(sdbg_host));
5222 if (NULL == hpnt) {
5223 pr_err("%s: scsi_host_alloc failed\n", __func__);
5224 error = -ENODEV;
5225 return error;
5226 }
5227
5228 sdbg_host->shost = hpnt;
5229 *((struct sdebug_host_info **)hpnt->hostdata) = sdbg_host;
5230 if ((hpnt->this_id >= 0) && (scsi_debug_num_tgts > hpnt->this_id))
5231 hpnt->max_id = scsi_debug_num_tgts + 1;
5232 else
5233 hpnt->max_id = scsi_debug_num_tgts;
5234 hpnt->max_lun = SAM2_WLUN_REPORT_LUNS; /* = scsi_debug_max_luns; */
5235
5236 host_prot = 0;
5237
5238 switch (scsi_debug_dif) {
5239
5240 case SD_DIF_TYPE1_PROTECTION:
5241 host_prot = SHOST_DIF_TYPE1_PROTECTION;
5242 if (scsi_debug_dix)
5243 host_prot |= SHOST_DIX_TYPE1_PROTECTION;
5244 break;
5245
5246 case SD_DIF_TYPE2_PROTECTION:
5247 host_prot = SHOST_DIF_TYPE2_PROTECTION;
5248 if (scsi_debug_dix)
5249 host_prot |= SHOST_DIX_TYPE2_PROTECTION;
5250 break;
5251
5252 case SD_DIF_TYPE3_PROTECTION:
5253 host_prot = SHOST_DIF_TYPE3_PROTECTION;
5254 if (scsi_debug_dix)
5255 host_prot |= SHOST_DIX_TYPE3_PROTECTION;
5256 break;
5257
5258 default:
5259 if (scsi_debug_dix)
5260 host_prot |= SHOST_DIX_TYPE0_PROTECTION;
5261 break;
5262 }
5263
5264 scsi_host_set_prot(hpnt, host_prot);
5265
5266 printk(KERN_INFO "scsi_debug: host protection%s%s%s%s%s%s%s\n",
5267 (host_prot & SHOST_DIF_TYPE1_PROTECTION) ? " DIF1" : "",
5268 (host_prot & SHOST_DIF_TYPE2_PROTECTION) ? " DIF2" : "",
5269 (host_prot & SHOST_DIF_TYPE3_PROTECTION) ? " DIF3" : "",
5270 (host_prot & SHOST_DIX_TYPE0_PROTECTION) ? " DIX0" : "",
5271 (host_prot & SHOST_DIX_TYPE1_PROTECTION) ? " DIX1" : "",
5272 (host_prot & SHOST_DIX_TYPE2_PROTECTION) ? " DIX2" : "",
5273 (host_prot & SHOST_DIX_TYPE3_PROTECTION) ? " DIX3" : "");
5274
5275 if (scsi_debug_guard == 1)
5276 scsi_host_set_guard(hpnt, SHOST_DIX_GUARD_IP);
5277 else
5278 scsi_host_set_guard(hpnt, SHOST_DIX_GUARD_CRC);
5279
5280 opts = scsi_debug_opts;
5281 if (SCSI_DEBUG_OPT_RECOVERED_ERR & opts)
5282 sdebug_any_injecting_opt = true;
5283 else if (SCSI_DEBUG_OPT_TRANSPORT_ERR & opts)
5284 sdebug_any_injecting_opt = true;
5285 else if (SCSI_DEBUG_OPT_DIF_ERR & opts)
5286 sdebug_any_injecting_opt = true;
5287 else if (SCSI_DEBUG_OPT_DIX_ERR & opts)
5288 sdebug_any_injecting_opt = true;
5289 else if (SCSI_DEBUG_OPT_SHORT_TRANSFER & opts)
5290 sdebug_any_injecting_opt = true;
5291
5292 error = scsi_add_host(hpnt, &sdbg_host->dev);
5293 if (error) {
5294 printk(KERN_ERR "%s: scsi_add_host failed\n", __func__);
5295 error = -ENODEV;
5296 scsi_host_put(hpnt);
5297 } else
5298 scsi_scan_host(hpnt);
5299
5300 return error;
5301 }
5302
5303 static int sdebug_driver_remove(struct device * dev)
5304 {
5305 struct sdebug_host_info *sdbg_host;
5306 struct sdebug_dev_info *sdbg_devinfo, *tmp;
5307
5308 sdbg_host = to_sdebug_host(dev);
5309
5310 if (!sdbg_host) {
5311 printk(KERN_ERR "%s: Unable to locate host info\n",
5312 __func__);
5313 return -ENODEV;
5314 }
5315
5316 scsi_remove_host(sdbg_host->shost);
5317
5318 list_for_each_entry_safe(sdbg_devinfo, tmp, &sdbg_host->dev_info_list,
5319 dev_list) {
5320 list_del(&sdbg_devinfo->dev_list);
5321 kfree(sdbg_devinfo);
5322 }
5323
5324 scsi_host_put(sdbg_host->shost);
5325 return 0;
5326 }
5327
5328 static int pseudo_lld_bus_match(struct device *dev,
5329 struct device_driver *dev_driver)
5330 {
5331 return 1;
5332 }
5333
5334 static struct bus_type pseudo_lld_bus = {
5335 .name = "pseudo",
5336 .match = pseudo_lld_bus_match,
5337 .probe = sdebug_driver_probe,
5338 .remove = sdebug_driver_remove,
5339 .drv_groups = sdebug_drv_groups,
5340 };
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