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Merge remote-tracking branch 'mkp-scsi/4.5/scsi-fixes' into fixes
[mirror_ubuntu-zesty-kernel.git] / drivers / scsi / scsi_debug.c
1 /*
2 * vvvvvvvvvvvvvvvvvvvvvvv Original vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv
3 * Copyright (C) 1992 Eric Youngdale
4 * Simulate a host adapter with 2 disks attached. Do a lot of checking
5 * to make sure that we are not getting blocks mixed up, and PANIC if
6 * anything out of the ordinary is seen.
7 * ^^^^^^^^^^^^^^^^^^^^^^^ Original ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
8 *
9 * 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
29 #define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__
30
31 #include <linux/module.h>
32
33 #include <linux/kernel.h>
34 #include <linux/errno.h>
35 #include <linux/timer.h>
36 #include <linux/slab.h>
37 #include <linux/types.h>
38 #include <linux/string.h>
39 #include <linux/genhd.h>
40 #include <linux/fs.h>
41 #include <linux/init.h>
42 #include <linux/proc_fs.h>
43 #include <linux/vmalloc.h>
44 #include <linux/moduleparam.h>
45 #include <linux/scatterlist.h>
46 #include <linux/blkdev.h>
47 #include <linux/crc-t10dif.h>
48 #include <linux/spinlock.h>
49 #include <linux/interrupt.h>
50 #include <linux/atomic.h>
51 #include <linux/hrtimer.h>
52
53 #include <net/checksum.h>
54
55 #include <asm/unaligned.h>
56
57 #include <scsi/scsi.h>
58 #include <scsi/scsi_cmnd.h>
59 #include <scsi/scsi_device.h>
60 #include <scsi/scsi_host.h>
61 #include <scsi/scsicam.h>
62 #include <scsi/scsi_eh.h>
63 #include <scsi/scsi_tcq.h>
64 #include <scsi/scsi_dbg.h>
65
66 #include "sd.h"
67 #include "scsi_logging.h"
68
69 #define SCSI_DEBUG_VERSION "1.85"
70 static const char *scsi_debug_version_date = "20141022";
71
72 #define MY_NAME "scsi_debug"
73
74 /* Additional Sense Code (ASC) */
75 #define NO_ADDITIONAL_SENSE 0x0
76 #define LOGICAL_UNIT_NOT_READY 0x4
77 #define LOGICAL_UNIT_COMMUNICATION_FAILURE 0x8
78 #define UNRECOVERED_READ_ERR 0x11
79 #define PARAMETER_LIST_LENGTH_ERR 0x1a
80 #define INVALID_OPCODE 0x20
81 #define LBA_OUT_OF_RANGE 0x21
82 #define INVALID_FIELD_IN_CDB 0x24
83 #define INVALID_FIELD_IN_PARAM_LIST 0x26
84 #define UA_RESET_ASC 0x29
85 #define UA_CHANGED_ASC 0x2a
86 #define TARGET_CHANGED_ASC 0x3f
87 #define LUNS_CHANGED_ASCQ 0x0e
88 #define INSUFF_RES_ASC 0x55
89 #define INSUFF_RES_ASCQ 0x3
90 #define POWER_ON_RESET_ASCQ 0x0
91 #define BUS_RESET_ASCQ 0x2 /* scsi bus reset occurred */
92 #define MODE_CHANGED_ASCQ 0x1 /* mode parameters changed */
93 #define CAPACITY_CHANGED_ASCQ 0x9
94 #define SAVING_PARAMS_UNSUP 0x39
95 #define TRANSPORT_PROBLEM 0x4b
96 #define THRESHOLD_EXCEEDED 0x5d
97 #define LOW_POWER_COND_ON 0x5e
98 #define MISCOMPARE_VERIFY_ASC 0x1d
99 #define MICROCODE_CHANGED_ASCQ 0x1 /* with TARGET_CHANGED_ASC */
100 #define MICROCODE_CHANGED_WO_RESET_ASCQ 0x16
101
102 /* Additional Sense Code Qualifier (ASCQ) */
103 #define ACK_NAK_TO 0x3
104
105
106 /* Default values for driver parameters */
107 #define DEF_NUM_HOST 1
108 #define DEF_NUM_TGTS 1
109 #define DEF_MAX_LUNS 1
110 /* With these defaults, this driver will make 1 host with 1 target
111 * (id 0) containing 1 logical unit (lun 0). That is 1 device.
112 */
113 #define DEF_ATO 1
114 #define DEF_DELAY 1 /* if > 0 unit is a jiffy */
115 #define DEF_DEV_SIZE_MB 8
116 #define DEF_DIF 0
117 #define DEF_DIX 0
118 #define DEF_D_SENSE 0
119 #define DEF_EVERY_NTH 0
120 #define DEF_FAKE_RW 0
121 #define DEF_GUARD 0
122 #define DEF_HOST_LOCK 0
123 #define DEF_LBPU 0
124 #define DEF_LBPWS 0
125 #define DEF_LBPWS10 0
126 #define DEF_LBPRZ 1
127 #define DEF_LOWEST_ALIGNED 0
128 #define DEF_NDELAY 0 /* if > 0 unit is a nanosecond */
129 #define DEF_NO_LUN_0 0
130 #define DEF_NUM_PARTS 0
131 #define DEF_OPTS 0
132 #define DEF_OPT_BLKS 1024
133 #define DEF_PHYSBLK_EXP 0
134 #define DEF_PTYPE 0
135 #define DEF_REMOVABLE false
136 #define DEF_SCSI_LEVEL 6 /* INQUIRY, byte2 [6->SPC-4] */
137 #define DEF_SECTOR_SIZE 512
138 #define DEF_UNMAP_ALIGNMENT 0
139 #define DEF_UNMAP_GRANULARITY 1
140 #define DEF_UNMAP_MAX_BLOCKS 0xFFFFFFFF
141 #define DEF_UNMAP_MAX_DESC 256
142 #define DEF_VIRTUAL_GB 0
143 #define DEF_VPD_USE_HOSTNO 1
144 #define DEF_WRITESAME_LENGTH 0xFFFF
145 #define DEF_STRICT 0
146 #define DELAY_OVERRIDDEN -9999
147
148 /* bit mask values for scsi_debug_opts */
149 #define SCSI_DEBUG_OPT_NOISE 1
150 #define SCSI_DEBUG_OPT_MEDIUM_ERR 2
151 #define SCSI_DEBUG_OPT_TIMEOUT 4
152 #define SCSI_DEBUG_OPT_RECOVERED_ERR 8
153 #define SCSI_DEBUG_OPT_TRANSPORT_ERR 16
154 #define SCSI_DEBUG_OPT_DIF_ERR 32
155 #define SCSI_DEBUG_OPT_DIX_ERR 64
156 #define SCSI_DEBUG_OPT_MAC_TIMEOUT 128
157 #define SCSI_DEBUG_OPT_SHORT_TRANSFER 0x100
158 #define SCSI_DEBUG_OPT_Q_NOISE 0x200
159 #define SCSI_DEBUG_OPT_ALL_TSF 0x400
160 #define SCSI_DEBUG_OPT_RARE_TSF 0x800
161 #define SCSI_DEBUG_OPT_N_WCE 0x1000
162 #define SCSI_DEBUG_OPT_RESET_NOISE 0x2000
163 #define SCSI_DEBUG_OPT_NO_CDB_NOISE 0x4000
164 #define SCSI_DEBUG_OPT_ALL_NOISE (0x1 | 0x200 | 0x2000)
165 /* When "every_nth" > 0 then modulo "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 *
172 * When "every_nth" < 0 then after "- every_nth" commands:
173 * - a no response is simulated if SCSI_DEBUG_OPT_TIMEOUT is set
174 * - a RECOVERED_ERROR is simulated on successful read and write
175 * commands if SCSI_DEBUG_OPT_RECOVERED_ERR is set.
176 * - a TRANSPORT_ERROR is simulated on successful read and write
177 * commands if SCSI_DEBUG_OPT_TRANSPORT_ERR is set.
178 * This will continue until some other action occurs (e.g. the user
179 * writing a new value (other than -1 or 1) to every_nth via sysfs).
180 */
181
182 /* As indicated in SAM-5 and SPC-4 Unit Attentions (UAs)are returned in
183 * priority order. In the subset implemented here lower numbers have higher
184 * priority. The UA numbers should be a sequence starting from 0 with
185 * SDEBUG_NUM_UAS being 1 higher than the highest numbered UA. */
186 #define SDEBUG_UA_POR 0 /* Power on, reset, or bus device reset */
187 #define SDEBUG_UA_BUS_RESET 1
188 #define SDEBUG_UA_MODE_CHANGED 2
189 #define SDEBUG_UA_CAPACITY_CHANGED 3
190 #define SDEBUG_UA_LUNS_CHANGED 4
191 #define SDEBUG_UA_MICROCODE_CHANGED 5 /* simulate firmware change */
192 #define SDEBUG_UA_MICROCODE_CHANGED_WO_RESET 6
193 #define SDEBUG_NUM_UAS 7
194
195 /* for check_readiness() */
196 #define UAS_ONLY 1 /* check for UAs only */
197 #define UAS_TUR 0 /* if no UAs then check if media access possible */
198
199 /* when 1==SCSI_DEBUG_OPT_MEDIUM_ERR, a medium error is simulated at this
200 * sector on read commands: */
201 #define OPT_MEDIUM_ERR_ADDR 0x1234 /* that's sector 4660 in decimal */
202 #define OPT_MEDIUM_ERR_NUM 10 /* number of consecutive medium errs */
203
204 /* If REPORT LUNS has luns >= 256 it can choose "flat space" (value 1)
205 * or "peripheral device" addressing (value 0) */
206 #define SAM2_LUN_ADDRESS_METHOD 0
207
208 /* SCSI_DEBUG_CANQUEUE is the maximum number of commands that can be queued
209 * (for response) at one time. Can be reduced by max_queue option. Command
210 * responses are not queued when delay=0 and ndelay=0. The per-device
211 * DEF_CMD_PER_LUN can be changed via sysfs:
212 * /sys/class/scsi_device/<h:c:t:l>/device/queue_depth but cannot exceed
213 * SCSI_DEBUG_CANQUEUE. */
214 #define SCSI_DEBUG_CANQUEUE_WORDS 9 /* a WORD is bits in a long */
215 #define SCSI_DEBUG_CANQUEUE (SCSI_DEBUG_CANQUEUE_WORDS * BITS_PER_LONG)
216 #define DEF_CMD_PER_LUN 255
217
218 #if DEF_CMD_PER_LUN > SCSI_DEBUG_CANQUEUE
219 #warning "Expect DEF_CMD_PER_LUN <= SCSI_DEBUG_CANQUEUE"
220 #endif
221
222 /* SCSI opcodes (first byte of cdb) mapped onto these indexes */
223 enum sdeb_opcode_index {
224 SDEB_I_INVALID_OPCODE = 0,
225 SDEB_I_INQUIRY = 1,
226 SDEB_I_REPORT_LUNS = 2,
227 SDEB_I_REQUEST_SENSE = 3,
228 SDEB_I_TEST_UNIT_READY = 4,
229 SDEB_I_MODE_SENSE = 5, /* 6, 10 */
230 SDEB_I_MODE_SELECT = 6, /* 6, 10 */
231 SDEB_I_LOG_SENSE = 7,
232 SDEB_I_READ_CAPACITY = 8, /* 10; 16 is in SA_IN(16) */
233 SDEB_I_READ = 9, /* 6, 10, 12, 16 */
234 SDEB_I_WRITE = 10, /* 6, 10, 12, 16 */
235 SDEB_I_START_STOP = 11,
236 SDEB_I_SERV_ACT_IN = 12, /* 12, 16 */
237 SDEB_I_SERV_ACT_OUT = 13, /* 12, 16 */
238 SDEB_I_MAINT_IN = 14,
239 SDEB_I_MAINT_OUT = 15,
240 SDEB_I_VERIFY = 16, /* 10 only */
241 SDEB_I_VARIABLE_LEN = 17,
242 SDEB_I_RESERVE = 18, /* 6, 10 */
243 SDEB_I_RELEASE = 19, /* 6, 10 */
244 SDEB_I_ALLOW_REMOVAL = 20, /* PREVENT ALLOW MEDIUM REMOVAL */
245 SDEB_I_REZERO_UNIT = 21, /* REWIND in SSC */
246 SDEB_I_ATA_PT = 22, /* 12, 16 */
247 SDEB_I_SEND_DIAG = 23,
248 SDEB_I_UNMAP = 24,
249 SDEB_I_XDWRITEREAD = 25, /* 10 only */
250 SDEB_I_WRITE_BUFFER = 26,
251 SDEB_I_WRITE_SAME = 27, /* 10, 16 */
252 SDEB_I_SYNC_CACHE = 28, /* 10 only */
253 SDEB_I_COMP_WRITE = 29,
254 SDEB_I_LAST_ELEMENT = 30, /* keep this last */
255 };
256
257 static const unsigned char opcode_ind_arr[256] = {
258 /* 0x0; 0x0->0x1f: 6 byte cdbs */
259 SDEB_I_TEST_UNIT_READY, SDEB_I_REZERO_UNIT, 0, SDEB_I_REQUEST_SENSE,
260 0, 0, 0, 0,
261 SDEB_I_READ, 0, SDEB_I_WRITE, 0, 0, 0, 0, 0,
262 0, 0, SDEB_I_INQUIRY, 0, 0, SDEB_I_MODE_SELECT, SDEB_I_RESERVE,
263 SDEB_I_RELEASE,
264 0, 0, SDEB_I_MODE_SENSE, SDEB_I_START_STOP, 0, SDEB_I_SEND_DIAG,
265 SDEB_I_ALLOW_REMOVAL, 0,
266 /* 0x20; 0x20->0x3f: 10 byte cdbs */
267 0, 0, 0, 0, 0, SDEB_I_READ_CAPACITY, 0, 0,
268 SDEB_I_READ, 0, SDEB_I_WRITE, 0, 0, 0, 0, SDEB_I_VERIFY,
269 0, 0, 0, 0, 0, SDEB_I_SYNC_CACHE, 0, 0,
270 0, 0, 0, SDEB_I_WRITE_BUFFER, 0, 0, 0, 0,
271 /* 0x40; 0x40->0x5f: 10 byte cdbs */
272 0, SDEB_I_WRITE_SAME, SDEB_I_UNMAP, 0, 0, 0, 0, 0,
273 0, 0, 0, 0, 0, SDEB_I_LOG_SENSE, 0, 0,
274 0, 0, 0, SDEB_I_XDWRITEREAD, 0, SDEB_I_MODE_SELECT, SDEB_I_RESERVE,
275 SDEB_I_RELEASE,
276 0, 0, SDEB_I_MODE_SENSE, 0, 0, 0, 0, 0,
277 /* 0x60; 0x60->0x7d are reserved */
278 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
279 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
280 0, SDEB_I_VARIABLE_LEN,
281 /* 0x80; 0x80->0x9f: 16 byte cdbs */
282 0, 0, 0, 0, 0, SDEB_I_ATA_PT, 0, 0,
283 SDEB_I_READ, SDEB_I_COMP_WRITE, SDEB_I_WRITE, 0, 0, 0, 0, 0,
284 0, 0, 0, SDEB_I_WRITE_SAME, 0, 0, 0, 0,
285 0, 0, 0, 0, 0, 0, SDEB_I_SERV_ACT_IN, SDEB_I_SERV_ACT_OUT,
286 /* 0xa0; 0xa0->0xbf: 12 byte cdbs */
287 SDEB_I_REPORT_LUNS, SDEB_I_ATA_PT, 0, SDEB_I_MAINT_IN,
288 SDEB_I_MAINT_OUT, 0, 0, 0,
289 SDEB_I_READ, SDEB_I_SERV_ACT_OUT, SDEB_I_WRITE, SDEB_I_SERV_ACT_IN,
290 0, 0, 0, 0,
291 0, 0, 0, 0, 0, 0, 0, 0,
292 0, 0, 0, 0, 0, 0, 0, 0,
293 /* 0xc0; 0xc0->0xff: vendor specific */
294 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
295 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
296 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
297 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
298 };
299
300 #define F_D_IN 1
301 #define F_D_OUT 2
302 #define F_D_OUT_MAYBE 4 /* WRITE SAME, NDOB bit */
303 #define F_D_UNKN 8
304 #define F_RL_WLUN_OK 0x10
305 #define F_SKIP_UA 0x20
306 #define F_DELAY_OVERR 0x40
307 #define F_SA_LOW 0x80 /* cdb byte 1, bits 4 to 0 */
308 #define F_SA_HIGH 0x100 /* as used by variable length cdbs */
309 #define F_INV_OP 0x200
310 #define F_FAKE_RW 0x400
311 #define F_M_ACCESS 0x800 /* media access */
312
313 #define FF_RESPOND (F_RL_WLUN_OK | F_SKIP_UA | F_DELAY_OVERR)
314 #define FF_DIRECT_IO (F_M_ACCESS | F_FAKE_RW)
315 #define FF_SA (F_SA_HIGH | F_SA_LOW)
316
317 struct sdebug_dev_info;
318 static int resp_inquiry(struct scsi_cmnd *, struct sdebug_dev_info *);
319 static int resp_report_luns(struct scsi_cmnd *, struct sdebug_dev_info *);
320 static int resp_requests(struct scsi_cmnd *, struct sdebug_dev_info *);
321 static int resp_mode_sense(struct scsi_cmnd *, struct sdebug_dev_info *);
322 static int resp_mode_select(struct scsi_cmnd *, struct sdebug_dev_info *);
323 static int resp_log_sense(struct scsi_cmnd *, struct sdebug_dev_info *);
324 static int resp_readcap(struct scsi_cmnd *, struct sdebug_dev_info *);
325 static int resp_read_dt0(struct scsi_cmnd *, struct sdebug_dev_info *);
326 static int resp_write_dt0(struct scsi_cmnd *, struct sdebug_dev_info *);
327 static int resp_start_stop(struct scsi_cmnd *, struct sdebug_dev_info *);
328 static int resp_readcap16(struct scsi_cmnd *, struct sdebug_dev_info *);
329 static int resp_get_lba_status(struct scsi_cmnd *, struct sdebug_dev_info *);
330 static int resp_report_tgtpgs(struct scsi_cmnd *, struct sdebug_dev_info *);
331 static int resp_unmap(struct scsi_cmnd *, struct sdebug_dev_info *);
332 static int resp_rsup_opcodes(struct scsi_cmnd *, struct sdebug_dev_info *);
333 static int resp_rsup_tmfs(struct scsi_cmnd *, struct sdebug_dev_info *);
334 static int resp_write_same_10(struct scsi_cmnd *, struct sdebug_dev_info *);
335 static int resp_write_same_16(struct scsi_cmnd *, struct sdebug_dev_info *);
336 static int resp_xdwriteread_10(struct scsi_cmnd *, struct sdebug_dev_info *);
337 static int resp_comp_write(struct scsi_cmnd *, struct sdebug_dev_info *);
338 static int resp_write_buffer(struct scsi_cmnd *, struct sdebug_dev_info *);
339
340 struct opcode_info_t {
341 u8 num_attached; /* 0 if this is it (i.e. a leaf); use 0xff
342 * for terminating element */
343 u8 opcode; /* if num_attached > 0, preferred */
344 u16 sa; /* service action */
345 u32 flags; /* OR-ed set of SDEB_F_* */
346 int (*pfp)(struct scsi_cmnd *, struct sdebug_dev_info *);
347 const struct opcode_info_t *arrp; /* num_attached elements or NULL */
348 u8 len_mask[16]; /* len=len_mask[0], then mask for cdb[1]... */
349 /* ignore cdb bytes after position 15 */
350 };
351
352 static const struct opcode_info_t msense_iarr[1] = {
353 {0, 0x1a, 0, F_D_IN, NULL, NULL,
354 {6, 0xe8, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
355 };
356
357 static const struct opcode_info_t mselect_iarr[1] = {
358 {0, 0x15, 0, F_D_OUT, NULL, NULL,
359 {6, 0xf1, 0, 0, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
360 };
361
362 static const struct opcode_info_t read_iarr[3] = {
363 {0, 0x28, 0, F_D_IN | FF_DIRECT_IO, resp_read_dt0, NULL,/* READ(10) */
364 {10, 0xff, 0xff, 0xff, 0xff, 0xff, 0x1f, 0xff, 0xff, 0xc7, 0, 0,
365 0, 0, 0, 0} },
366 {0, 0x8, 0, F_D_IN | FF_DIRECT_IO, resp_read_dt0, NULL, /* READ(6) */
367 {6, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
368 {0, 0xa8, 0, F_D_IN | FF_DIRECT_IO, resp_read_dt0, NULL,/* READ(12) */
369 {12, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x9f,
370 0xc7, 0, 0, 0, 0} },
371 };
372
373 static const struct opcode_info_t write_iarr[3] = {
374 {0, 0x2a, 0, F_D_OUT | FF_DIRECT_IO, resp_write_dt0, NULL, /* 10 */
375 {10, 0xfb, 0xff, 0xff, 0xff, 0xff, 0x1f, 0xff, 0xff, 0xc7, 0, 0,
376 0, 0, 0, 0} },
377 {0, 0xa, 0, F_D_OUT | FF_DIRECT_IO, resp_write_dt0, NULL, /* 6 */
378 {6, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
379 {0, 0xaa, 0, F_D_OUT | FF_DIRECT_IO, resp_write_dt0, NULL, /* 12 */
380 {12, 0xfb, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x9f,
381 0xc7, 0, 0, 0, 0} },
382 };
383
384 static const struct opcode_info_t sa_in_iarr[1] = {
385 {0, 0x9e, 0x12, F_SA_LOW | F_D_IN, resp_get_lba_status, NULL,
386 {16, 0x12, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
387 0xff, 0xff, 0xff, 0, 0xc7} },
388 };
389
390 static const struct opcode_info_t vl_iarr[1] = { /* VARIABLE LENGTH */
391 {0, 0x7f, 0xb, F_SA_HIGH | F_D_OUT | FF_DIRECT_IO, resp_write_dt0,
392 NULL, {32, 0xc7, 0, 0, 0, 0, 0x1f, 0x18, 0x0, 0xb, 0xfa,
393 0, 0xff, 0xff, 0xff, 0xff} }, /* WRITE(32) */
394 };
395
396 static const struct opcode_info_t maint_in_iarr[2] = {
397 {0, 0xa3, 0xc, F_SA_LOW | F_D_IN, resp_rsup_opcodes, NULL,
398 {12, 0xc, 0x87, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0,
399 0xc7, 0, 0, 0, 0} },
400 {0, 0xa3, 0xd, F_SA_LOW | F_D_IN, resp_rsup_tmfs, NULL,
401 {12, 0xd, 0x80, 0, 0, 0, 0xff, 0xff, 0xff, 0xff, 0, 0xc7, 0, 0,
402 0, 0} },
403 };
404
405 static const struct opcode_info_t write_same_iarr[1] = {
406 {0, 0x93, 0, F_D_OUT_MAYBE | FF_DIRECT_IO, resp_write_same_16, NULL,
407 {16, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
408 0xff, 0xff, 0xff, 0x1f, 0xc7} },
409 };
410
411 static const struct opcode_info_t reserve_iarr[1] = {
412 {0, 0x16, 0, F_D_OUT, NULL, NULL, /* RESERVE(6) */
413 {6, 0x1f, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
414 };
415
416 static const struct opcode_info_t release_iarr[1] = {
417 {0, 0x17, 0, F_D_OUT, NULL, NULL, /* RELEASE(6) */
418 {6, 0x1f, 0xff, 0, 0, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
419 };
420
421
422 /* This array is accessed via SDEB_I_* values. Make sure all are mapped,
423 * plus the terminating elements for logic that scans this table such as
424 * REPORT SUPPORTED OPERATION CODES. */
425 static const struct opcode_info_t opcode_info_arr[SDEB_I_LAST_ELEMENT + 1] = {
426 /* 0 */
427 {0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL,
428 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
429 {0, 0x12, 0, FF_RESPOND | F_D_IN, resp_inquiry, NULL,
430 {6, 0xe3, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
431 {0, 0xa0, 0, FF_RESPOND | F_D_IN, resp_report_luns, NULL,
432 {12, 0xe3, 0xff, 0, 0, 0, 0xff, 0xff, 0xff, 0xff, 0, 0xc7, 0, 0,
433 0, 0} },
434 {0, 0x3, 0, FF_RESPOND | F_D_IN, resp_requests, NULL,
435 {6, 0xe1, 0, 0, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
436 {0, 0x0, 0, F_M_ACCESS | F_RL_WLUN_OK, NULL, NULL,/* TEST UNIT READY */
437 {6, 0, 0, 0, 0, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
438 {1, 0x5a, 0, F_D_IN, resp_mode_sense, msense_iarr,
439 {10, 0xf8, 0xff, 0xff, 0, 0, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0,
440 0} },
441 {1, 0x55, 0, F_D_OUT, resp_mode_select, mselect_iarr,
442 {10, 0xf1, 0, 0, 0, 0, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0} },
443 {0, 0x4d, 0, F_D_IN, resp_log_sense, NULL,
444 {10, 0xe3, 0xff, 0xff, 0, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0,
445 0, 0, 0} },
446 {0, 0x25, 0, F_D_IN, resp_readcap, NULL,
447 {10, 0xe1, 0xff, 0xff, 0xff, 0xff, 0, 0, 0x1, 0xc7, 0, 0, 0, 0,
448 0, 0} },
449 {3, 0x88, 0, F_D_IN | FF_DIRECT_IO, resp_read_dt0, read_iarr,
450 {16, 0xfe, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
451 0xff, 0xff, 0xff, 0x9f, 0xc7} }, /* READ(16) */
452 /* 10 */
453 {3, 0x8a, 0, F_D_OUT | FF_DIRECT_IO, resp_write_dt0, write_iarr,
454 {16, 0xfa, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
455 0xff, 0xff, 0xff, 0x9f, 0xc7} }, /* WRITE(16) */
456 {0, 0x1b, 0, 0, resp_start_stop, NULL, /* START STOP UNIT */
457 {6, 0x1, 0, 0xf, 0xf7, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
458 {1, 0x9e, 0x10, F_SA_LOW | F_D_IN, resp_readcap16, sa_in_iarr,
459 {16, 0x10, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
460 0xff, 0xff, 0xff, 0x1, 0xc7} }, /* READ CAPACITY(16) */
461 {0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL, /* SA OUT */
462 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
463 {2, 0xa3, 0xa, F_SA_LOW | F_D_IN, resp_report_tgtpgs, maint_in_iarr,
464 {12, 0xea, 0, 0, 0, 0, 0xff, 0xff, 0xff, 0xff, 0, 0xc7, 0, 0, 0,
465 0} },
466 {0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL, /* MAINT OUT */
467 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
468 {0, 0x2f, 0, F_D_OUT_MAYBE | FF_DIRECT_IO, NULL, NULL, /* VERIFY(10) */
469 {10, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc7,
470 0, 0, 0, 0, 0, 0} },
471 {1, 0x7f, 0x9, F_SA_HIGH | F_D_IN | FF_DIRECT_IO, resp_read_dt0,
472 vl_iarr, {32, 0xc7, 0, 0, 0, 0, 0x1f, 0x18, 0x0, 0x9, 0xfe, 0,
473 0xff, 0xff, 0xff, 0xff} },/* VARIABLE LENGTH, READ(32) */
474 {1, 0x56, 0, F_D_OUT, NULL, reserve_iarr, /* RESERVE(10) */
475 {10, 0xff, 0xff, 0xff, 0, 0, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0,
476 0} },
477 {1, 0x57, 0, F_D_OUT, NULL, release_iarr, /* RELEASE(10) */
478 {10, 0x13, 0xff, 0xff, 0, 0, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0,
479 0} },
480 /* 20 */
481 {0, 0x1e, 0, 0, NULL, NULL, /* ALLOW REMOVAL */
482 {6, 0, 0, 0, 0x3, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
483 {0, 0x1, 0, 0, resp_start_stop, NULL, /* REWIND ?? */
484 {6, 0x1, 0, 0, 0, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
485 {0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL, /* ATA_PT */
486 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
487 {0, 0x1d, F_D_OUT, 0, NULL, NULL, /* SEND DIAGNOSTIC */
488 {6, 0xf7, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
489 {0, 0x42, 0, F_D_OUT | FF_DIRECT_IO, resp_unmap, NULL, /* UNMAP */
490 {10, 0x1, 0, 0, 0, 0, 0x1f, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0} },
491 {0, 0x53, 0, F_D_IN | F_D_OUT | FF_DIRECT_IO, resp_xdwriteread_10,
492 NULL, {10, 0xff, 0xff, 0xff, 0xff, 0xff, 0x1f, 0xff, 0xff, 0xc7,
493 0, 0, 0, 0, 0, 0} },
494 {0, 0x3b, 0, F_D_OUT_MAYBE, resp_write_buffer, NULL,
495 {10, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0,
496 0, 0, 0, 0} }, /* WRITE_BUFFER */
497 {1, 0x41, 0, F_D_OUT_MAYBE | FF_DIRECT_IO, resp_write_same_10,
498 write_same_iarr, {10, 0xff, 0xff, 0xff, 0xff, 0xff, 0x1f, 0xff,
499 0xff, 0xc7, 0, 0, 0, 0, 0, 0} },
500 {0, 0x35, 0, F_DELAY_OVERR | FF_DIRECT_IO, NULL, NULL, /* SYNC_CACHE */
501 {10, 0x7, 0xff, 0xff, 0xff, 0xff, 0x1f, 0xff, 0xff, 0xc7, 0, 0,
502 0, 0, 0, 0} },
503 {0, 0x89, 0, F_D_OUT | FF_DIRECT_IO, resp_comp_write, NULL,
504 {16, 0xf8, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0, 0,
505 0, 0xff, 0x1f, 0xc7} }, /* COMPARE AND WRITE */
506
507 /* 30 */
508 {0xff, 0, 0, 0, NULL, NULL, /* terminating element */
509 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
510 };
511
512 struct sdebug_scmd_extra_t {
513 bool inj_recovered;
514 bool inj_transport;
515 bool inj_dif;
516 bool inj_dix;
517 bool inj_short;
518 };
519
520 static int scsi_debug_add_host = DEF_NUM_HOST;
521 static int scsi_debug_ato = DEF_ATO;
522 static int scsi_debug_delay = DEF_DELAY;
523 static int scsi_debug_dev_size_mb = DEF_DEV_SIZE_MB;
524 static int scsi_debug_dif = DEF_DIF;
525 static int scsi_debug_dix = DEF_DIX;
526 static int scsi_debug_dsense = DEF_D_SENSE;
527 static int scsi_debug_every_nth = DEF_EVERY_NTH;
528 static int scsi_debug_fake_rw = DEF_FAKE_RW;
529 static unsigned int scsi_debug_guard = DEF_GUARD;
530 static int scsi_debug_lowest_aligned = DEF_LOWEST_ALIGNED;
531 static int scsi_debug_max_luns = DEF_MAX_LUNS;
532 static int scsi_debug_max_queue = SCSI_DEBUG_CANQUEUE;
533 static atomic_t retired_max_queue; /* if > 0 then was prior max_queue */
534 static int scsi_debug_ndelay = DEF_NDELAY;
535 static int scsi_debug_no_lun_0 = DEF_NO_LUN_0;
536 static int scsi_debug_no_uld = 0;
537 static int scsi_debug_num_parts = DEF_NUM_PARTS;
538 static int scsi_debug_num_tgts = DEF_NUM_TGTS; /* targets per host */
539 static int scsi_debug_opt_blks = DEF_OPT_BLKS;
540 static int scsi_debug_opts = DEF_OPTS;
541 static int scsi_debug_physblk_exp = DEF_PHYSBLK_EXP;
542 static int scsi_debug_ptype = DEF_PTYPE; /* SCSI peripheral type (0==disk) */
543 static int scsi_debug_scsi_level = DEF_SCSI_LEVEL;
544 static int scsi_debug_sector_size = DEF_SECTOR_SIZE;
545 static int scsi_debug_virtual_gb = DEF_VIRTUAL_GB;
546 static int scsi_debug_vpd_use_hostno = DEF_VPD_USE_HOSTNO;
547 static unsigned int scsi_debug_lbpu = DEF_LBPU;
548 static unsigned int scsi_debug_lbpws = DEF_LBPWS;
549 static unsigned int scsi_debug_lbpws10 = DEF_LBPWS10;
550 static unsigned int scsi_debug_lbprz = DEF_LBPRZ;
551 static unsigned int scsi_debug_unmap_alignment = DEF_UNMAP_ALIGNMENT;
552 static unsigned int scsi_debug_unmap_granularity = DEF_UNMAP_GRANULARITY;
553 static unsigned int scsi_debug_unmap_max_blocks = DEF_UNMAP_MAX_BLOCKS;
554 static unsigned int scsi_debug_unmap_max_desc = DEF_UNMAP_MAX_DESC;
555 static unsigned int scsi_debug_write_same_length = DEF_WRITESAME_LENGTH;
556 static bool scsi_debug_removable = DEF_REMOVABLE;
557 static bool scsi_debug_clustering;
558 static bool scsi_debug_host_lock = DEF_HOST_LOCK;
559 static bool scsi_debug_strict = DEF_STRICT;
560 static bool sdebug_any_injecting_opt;
561
562 static atomic_t sdebug_cmnd_count;
563 static atomic_t sdebug_completions;
564 static atomic_t sdebug_a_tsf; /* counter of 'almost' TSFs */
565
566 #define DEV_READONLY(TGT) (0)
567
568 static unsigned int sdebug_store_sectors;
569 static sector_t sdebug_capacity; /* in sectors */
570
571 /* old BIOS stuff, kernel may get rid of them but some mode sense pages
572 may still need them */
573 static int sdebug_heads; /* heads per disk */
574 static int sdebug_cylinders_per; /* cylinders per surface */
575 static int sdebug_sectors_per; /* sectors per cylinder */
576
577 #define SDEBUG_MAX_PARTS 4
578
579 #define SCSI_DEBUG_MAX_CMD_LEN 32
580
581 static unsigned int scsi_debug_lbp(void)
582 {
583 return ((0 == scsi_debug_fake_rw) &&
584 (scsi_debug_lbpu | scsi_debug_lbpws | scsi_debug_lbpws10));
585 }
586
587 struct sdebug_dev_info {
588 struct list_head dev_list;
589 unsigned int channel;
590 unsigned int target;
591 u64 lun;
592 struct sdebug_host_info *sdbg_host;
593 unsigned long uas_bm[1];
594 atomic_t num_in_q;
595 char stopped; /* TODO: should be atomic */
596 bool used;
597 };
598
599 struct sdebug_host_info {
600 struct list_head host_list;
601 struct Scsi_Host *shost;
602 struct device dev;
603 struct list_head dev_info_list;
604 };
605
606 #define to_sdebug_host(d) \
607 container_of(d, struct sdebug_host_info, dev)
608
609 static LIST_HEAD(sdebug_host_list);
610 static DEFINE_SPINLOCK(sdebug_host_list_lock);
611
612
613 struct sdebug_hrtimer { /* ... is derived from hrtimer */
614 struct hrtimer hrt; /* must be first element */
615 int qa_indx;
616 };
617
618 struct sdebug_queued_cmd {
619 /* in_use flagged by a bit in queued_in_use_bm[] */
620 struct timer_list *cmnd_timerp;
621 struct tasklet_struct *tletp;
622 struct sdebug_hrtimer *sd_hrtp;
623 struct scsi_cmnd * a_cmnd;
624 };
625 static struct sdebug_queued_cmd queued_arr[SCSI_DEBUG_CANQUEUE];
626 static unsigned long queued_in_use_bm[SCSI_DEBUG_CANQUEUE_WORDS];
627
628
629 static unsigned char * fake_storep; /* ramdisk storage */
630 static struct sd_dif_tuple *dif_storep; /* protection info */
631 static void *map_storep; /* provisioning map */
632
633 static unsigned long map_size;
634 static int num_aborts;
635 static int num_dev_resets;
636 static int num_target_resets;
637 static int num_bus_resets;
638 static int num_host_resets;
639 static int dix_writes;
640 static int dix_reads;
641 static int dif_errors;
642
643 static DEFINE_SPINLOCK(queued_arr_lock);
644 static DEFINE_RWLOCK(atomic_rw);
645
646 static char sdebug_proc_name[] = MY_NAME;
647 static const char *my_name = MY_NAME;
648
649 static struct bus_type pseudo_lld_bus;
650
651 static struct device_driver sdebug_driverfs_driver = {
652 .name = sdebug_proc_name,
653 .bus = &pseudo_lld_bus,
654 };
655
656 static const int check_condition_result =
657 (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
658
659 static const int illegal_condition_result =
660 (DRIVER_SENSE << 24) | (DID_ABORT << 16) | SAM_STAT_CHECK_CONDITION;
661
662 static const int device_qfull_result =
663 (DID_OK << 16) | (COMMAND_COMPLETE << 8) | SAM_STAT_TASK_SET_FULL;
664
665 static unsigned char caching_pg[] = {0x8, 18, 0x14, 0, 0xff, 0xff, 0, 0,
666 0xff, 0xff, 0xff, 0xff, 0x80, 0x14, 0, 0,
667 0, 0, 0, 0};
668 static unsigned char ctrl_m_pg[] = {0xa, 10, 2, 0, 0, 0, 0, 0,
669 0, 0, 0x2, 0x4b};
670 static unsigned char iec_m_pg[] = {0x1c, 0xa, 0x08, 0, 0, 0, 0, 0,
671 0, 0, 0x0, 0x0};
672
673 static void *fake_store(unsigned long long lba)
674 {
675 lba = do_div(lba, sdebug_store_sectors);
676
677 return fake_storep + lba * scsi_debug_sector_size;
678 }
679
680 static struct sd_dif_tuple *dif_store(sector_t sector)
681 {
682 sector = sector_div(sector, sdebug_store_sectors);
683
684 return dif_storep + sector;
685 }
686
687 static int sdebug_add_adapter(void);
688 static void sdebug_remove_adapter(void);
689
690 static void sdebug_max_tgts_luns(void)
691 {
692 struct sdebug_host_info *sdbg_host;
693 struct Scsi_Host *hpnt;
694
695 spin_lock(&sdebug_host_list_lock);
696 list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) {
697 hpnt = sdbg_host->shost;
698 if ((hpnt->this_id >= 0) &&
699 (scsi_debug_num_tgts > hpnt->this_id))
700 hpnt->max_id = scsi_debug_num_tgts + 1;
701 else
702 hpnt->max_id = scsi_debug_num_tgts;
703 /* scsi_debug_max_luns; */
704 hpnt->max_lun = SCSI_W_LUN_REPORT_LUNS + 1;
705 }
706 spin_unlock(&sdebug_host_list_lock);
707 }
708
709 enum sdeb_cmd_data {SDEB_IN_DATA = 0, SDEB_IN_CDB = 1};
710
711 /* Set in_bit to -1 to indicate no bit position of invalid field */
712 static void
713 mk_sense_invalid_fld(struct scsi_cmnd *scp, enum sdeb_cmd_data c_d,
714 int in_byte, int in_bit)
715 {
716 unsigned char *sbuff;
717 u8 sks[4];
718 int sl, asc;
719
720 sbuff = scp->sense_buffer;
721 if (!sbuff) {
722 sdev_printk(KERN_ERR, scp->device,
723 "%s: sense_buffer is NULL\n", __func__);
724 return;
725 }
726 asc = c_d ? INVALID_FIELD_IN_CDB : INVALID_FIELD_IN_PARAM_LIST;
727 memset(sbuff, 0, SCSI_SENSE_BUFFERSIZE);
728 scsi_build_sense_buffer(scsi_debug_dsense, sbuff, ILLEGAL_REQUEST,
729 asc, 0);
730 memset(sks, 0, sizeof(sks));
731 sks[0] = 0x80;
732 if (c_d)
733 sks[0] |= 0x40;
734 if (in_bit >= 0) {
735 sks[0] |= 0x8;
736 sks[0] |= 0x7 & in_bit;
737 }
738 put_unaligned_be16(in_byte, sks + 1);
739 if (scsi_debug_dsense) {
740 sl = sbuff[7] + 8;
741 sbuff[7] = sl;
742 sbuff[sl] = 0x2;
743 sbuff[sl + 1] = 0x6;
744 memcpy(sbuff + sl + 4, sks, 3);
745 } else
746 memcpy(sbuff + 15, sks, 3);
747 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
748 sdev_printk(KERN_INFO, scp->device, "%s: [sense_key,asc,ascq"
749 "]: [0x5,0x%x,0x0] %c byte=%d, bit=%d\n",
750 my_name, asc, c_d ? 'C' : 'D', in_byte, in_bit);
751 }
752
753 static void mk_sense_buffer(struct scsi_cmnd *scp, int key, int asc, int asq)
754 {
755 unsigned char *sbuff;
756
757 sbuff = scp->sense_buffer;
758 if (!sbuff) {
759 sdev_printk(KERN_ERR, scp->device,
760 "%s: sense_buffer is NULL\n", __func__);
761 return;
762 }
763 memset(sbuff, 0, SCSI_SENSE_BUFFERSIZE);
764
765 scsi_build_sense_buffer(scsi_debug_dsense, sbuff, key, asc, asq);
766
767 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
768 sdev_printk(KERN_INFO, scp->device,
769 "%s: [sense_key,asc,ascq]: [0x%x,0x%x,0x%x]\n",
770 my_name, key, asc, asq);
771 }
772
773 static void
774 mk_sense_invalid_opcode(struct scsi_cmnd *scp)
775 {
776 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_OPCODE, 0);
777 }
778
779 static int scsi_debug_ioctl(struct scsi_device *dev, int cmd, void __user *arg)
780 {
781 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) {
782 if (0x1261 == cmd)
783 sdev_printk(KERN_INFO, dev,
784 "%s: BLKFLSBUF [0x1261]\n", __func__);
785 else if (0x5331 == cmd)
786 sdev_printk(KERN_INFO, dev,
787 "%s: CDROM_GET_CAPABILITY [0x5331]\n",
788 __func__);
789 else
790 sdev_printk(KERN_INFO, dev, "%s: cmd=0x%x\n",
791 __func__, cmd);
792 }
793 return -EINVAL;
794 /* return -ENOTTY; // correct return but upsets fdisk */
795 }
796
797 static void clear_luns_changed_on_target(struct sdebug_dev_info *devip)
798 {
799 struct sdebug_host_info *sdhp;
800 struct sdebug_dev_info *dp;
801
802 spin_lock(&sdebug_host_list_lock);
803 list_for_each_entry(sdhp, &sdebug_host_list, host_list) {
804 list_for_each_entry(dp, &sdhp->dev_info_list, dev_list) {
805 if ((devip->sdbg_host == dp->sdbg_host) &&
806 (devip->target == dp->target))
807 clear_bit(SDEBUG_UA_LUNS_CHANGED, dp->uas_bm);
808 }
809 }
810 spin_unlock(&sdebug_host_list_lock);
811 }
812
813 static int check_readiness(struct scsi_cmnd *SCpnt, int uas_only,
814 struct sdebug_dev_info * devip)
815 {
816 int k;
817 bool debug = !!(SCSI_DEBUG_OPT_NOISE & scsi_debug_opts);
818
819 k = find_first_bit(devip->uas_bm, SDEBUG_NUM_UAS);
820 if (k != SDEBUG_NUM_UAS) {
821 const char *cp = NULL;
822
823 switch (k) {
824 case SDEBUG_UA_POR:
825 mk_sense_buffer(SCpnt, UNIT_ATTENTION,
826 UA_RESET_ASC, POWER_ON_RESET_ASCQ);
827 if (debug)
828 cp = "power on reset";
829 break;
830 case SDEBUG_UA_BUS_RESET:
831 mk_sense_buffer(SCpnt, UNIT_ATTENTION,
832 UA_RESET_ASC, BUS_RESET_ASCQ);
833 if (debug)
834 cp = "bus reset";
835 break;
836 case SDEBUG_UA_MODE_CHANGED:
837 mk_sense_buffer(SCpnt, UNIT_ATTENTION,
838 UA_CHANGED_ASC, MODE_CHANGED_ASCQ);
839 if (debug)
840 cp = "mode parameters changed";
841 break;
842 case SDEBUG_UA_CAPACITY_CHANGED:
843 mk_sense_buffer(SCpnt, UNIT_ATTENTION,
844 UA_CHANGED_ASC, CAPACITY_CHANGED_ASCQ);
845 if (debug)
846 cp = "capacity data changed";
847 break;
848 case SDEBUG_UA_MICROCODE_CHANGED:
849 mk_sense_buffer(SCpnt, UNIT_ATTENTION,
850 TARGET_CHANGED_ASC, MICROCODE_CHANGED_ASCQ);
851 if (debug)
852 cp = "microcode has been changed";
853 break;
854 case SDEBUG_UA_MICROCODE_CHANGED_WO_RESET:
855 mk_sense_buffer(SCpnt, UNIT_ATTENTION,
856 TARGET_CHANGED_ASC,
857 MICROCODE_CHANGED_WO_RESET_ASCQ);
858 if (debug)
859 cp = "microcode has been changed without reset";
860 break;
861 case SDEBUG_UA_LUNS_CHANGED:
862 /*
863 * SPC-3 behavior is to report a UNIT ATTENTION with
864 * ASC/ASCQ REPORTED LUNS DATA HAS CHANGED on every LUN
865 * on the target, until a REPORT LUNS command is
866 * received. SPC-4 behavior is to report it only once.
867 * NOTE: scsi_debug_scsi_level does not use the same
868 * values as struct scsi_device->scsi_level.
869 */
870 if (scsi_debug_scsi_level >= 6) /* SPC-4 and above */
871 clear_luns_changed_on_target(devip);
872 mk_sense_buffer(SCpnt, UNIT_ATTENTION,
873 TARGET_CHANGED_ASC,
874 LUNS_CHANGED_ASCQ);
875 if (debug)
876 cp = "reported luns data has changed";
877 break;
878 default:
879 pr_warn("%s: unexpected unit attention code=%d\n",
880 __func__, k);
881 if (debug)
882 cp = "unknown";
883 break;
884 }
885 clear_bit(k, devip->uas_bm);
886 if (debug)
887 sdev_printk(KERN_INFO, SCpnt->device,
888 "%s reports: Unit attention: %s\n",
889 my_name, cp);
890 return check_condition_result;
891 }
892 if ((UAS_TUR == uas_only) && devip->stopped) {
893 mk_sense_buffer(SCpnt, NOT_READY, LOGICAL_UNIT_NOT_READY,
894 0x2);
895 if (debug)
896 sdev_printk(KERN_INFO, SCpnt->device,
897 "%s reports: Not ready: %s\n", my_name,
898 "initializing command required");
899 return check_condition_result;
900 }
901 return 0;
902 }
903
904 /* Returns 0 if ok else (DID_ERROR << 16). Sets scp->resid . */
905 static int fill_from_dev_buffer(struct scsi_cmnd *scp, unsigned char *arr,
906 int arr_len)
907 {
908 int act_len;
909 struct scsi_data_buffer *sdb = scsi_in(scp);
910
911 if (!sdb->length)
912 return 0;
913 if (!(scsi_bidi_cmnd(scp) || scp->sc_data_direction == DMA_FROM_DEVICE))
914 return (DID_ERROR << 16);
915
916 act_len = sg_copy_from_buffer(sdb->table.sgl, sdb->table.nents,
917 arr, arr_len);
918 sdb->resid = scsi_bufflen(scp) - act_len;
919
920 return 0;
921 }
922
923 /* Returns number of bytes fetched into 'arr' or -1 if error. */
924 static int fetch_to_dev_buffer(struct scsi_cmnd *scp, unsigned char *arr,
925 int arr_len)
926 {
927 if (!scsi_bufflen(scp))
928 return 0;
929 if (!(scsi_bidi_cmnd(scp) || scp->sc_data_direction == DMA_TO_DEVICE))
930 return -1;
931
932 return scsi_sg_copy_to_buffer(scp, arr, arr_len);
933 }
934
935
936 static const char * inq_vendor_id = "Linux ";
937 static const char * inq_product_id = "scsi_debug ";
938 static const char *inq_product_rev = "0184"; /* version less '.' */
939
940 /* Device identification VPD page. Returns number of bytes placed in arr */
941 static int inquiry_evpd_83(unsigned char * arr, int port_group_id,
942 int target_dev_id, int dev_id_num,
943 const char * dev_id_str,
944 int dev_id_str_len)
945 {
946 int num, port_a;
947 char b[32];
948
949 port_a = target_dev_id + 1;
950 /* T10 vendor identifier field format (faked) */
951 arr[0] = 0x2; /* ASCII */
952 arr[1] = 0x1;
953 arr[2] = 0x0;
954 memcpy(&arr[4], inq_vendor_id, 8);
955 memcpy(&arr[12], inq_product_id, 16);
956 memcpy(&arr[28], dev_id_str, dev_id_str_len);
957 num = 8 + 16 + dev_id_str_len;
958 arr[3] = num;
959 num += 4;
960 if (dev_id_num >= 0) {
961 /* NAA-5, Logical unit identifier (binary) */
962 arr[num++] = 0x1; /* binary (not necessarily sas) */
963 arr[num++] = 0x3; /* PIV=0, lu, naa */
964 arr[num++] = 0x0;
965 arr[num++] = 0x8;
966 arr[num++] = 0x53; /* naa-5 ieee company id=0x333333 (fake) */
967 arr[num++] = 0x33;
968 arr[num++] = 0x33;
969 arr[num++] = 0x30;
970 arr[num++] = (dev_id_num >> 24);
971 arr[num++] = (dev_id_num >> 16) & 0xff;
972 arr[num++] = (dev_id_num >> 8) & 0xff;
973 arr[num++] = dev_id_num & 0xff;
974 /* Target relative port number */
975 arr[num++] = 0x61; /* proto=sas, binary */
976 arr[num++] = 0x94; /* PIV=1, target port, rel port */
977 arr[num++] = 0x0; /* reserved */
978 arr[num++] = 0x4; /* length */
979 arr[num++] = 0x0; /* reserved */
980 arr[num++] = 0x0; /* reserved */
981 arr[num++] = 0x0;
982 arr[num++] = 0x1; /* relative port A */
983 }
984 /* NAA-5, Target port identifier */
985 arr[num++] = 0x61; /* proto=sas, binary */
986 arr[num++] = 0x93; /* piv=1, target port, naa */
987 arr[num++] = 0x0;
988 arr[num++] = 0x8;
989 arr[num++] = 0x52; /* naa-5, company id=0x222222 (fake) */
990 arr[num++] = 0x22;
991 arr[num++] = 0x22;
992 arr[num++] = 0x20;
993 arr[num++] = (port_a >> 24);
994 arr[num++] = (port_a >> 16) & 0xff;
995 arr[num++] = (port_a >> 8) & 0xff;
996 arr[num++] = port_a & 0xff;
997 /* NAA-5, Target port group identifier */
998 arr[num++] = 0x61; /* proto=sas, binary */
999 arr[num++] = 0x95; /* piv=1, target port group id */
1000 arr[num++] = 0x0;
1001 arr[num++] = 0x4;
1002 arr[num++] = 0;
1003 arr[num++] = 0;
1004 arr[num++] = (port_group_id >> 8) & 0xff;
1005 arr[num++] = port_group_id & 0xff;
1006 /* NAA-5, Target device identifier */
1007 arr[num++] = 0x61; /* proto=sas, binary */
1008 arr[num++] = 0xa3; /* piv=1, target device, naa */
1009 arr[num++] = 0x0;
1010 arr[num++] = 0x8;
1011 arr[num++] = 0x52; /* naa-5, company id=0x222222 (fake) */
1012 arr[num++] = 0x22;
1013 arr[num++] = 0x22;
1014 arr[num++] = 0x20;
1015 arr[num++] = (target_dev_id >> 24);
1016 arr[num++] = (target_dev_id >> 16) & 0xff;
1017 arr[num++] = (target_dev_id >> 8) & 0xff;
1018 arr[num++] = target_dev_id & 0xff;
1019 /* SCSI name string: Target device identifier */
1020 arr[num++] = 0x63; /* proto=sas, UTF-8 */
1021 arr[num++] = 0xa8; /* piv=1, target device, SCSI name string */
1022 arr[num++] = 0x0;
1023 arr[num++] = 24;
1024 memcpy(arr + num, "naa.52222220", 12);
1025 num += 12;
1026 snprintf(b, sizeof(b), "%08X", target_dev_id);
1027 memcpy(arr + num, b, 8);
1028 num += 8;
1029 memset(arr + num, 0, 4);
1030 num += 4;
1031 return num;
1032 }
1033
1034
1035 static unsigned char vpd84_data[] = {
1036 /* from 4th byte */ 0x22,0x22,0x22,0x0,0xbb,0x0,
1037 0x22,0x22,0x22,0x0,0xbb,0x1,
1038 0x22,0x22,0x22,0x0,0xbb,0x2,
1039 };
1040
1041 /* Software interface identification VPD page */
1042 static int inquiry_evpd_84(unsigned char * arr)
1043 {
1044 memcpy(arr, vpd84_data, sizeof(vpd84_data));
1045 return sizeof(vpd84_data);
1046 }
1047
1048 /* Management network addresses VPD page */
1049 static int inquiry_evpd_85(unsigned char * arr)
1050 {
1051 int num = 0;
1052 const char * na1 = "https://www.kernel.org/config";
1053 const char * na2 = "http://www.kernel.org/log";
1054 int plen, olen;
1055
1056 arr[num++] = 0x1; /* lu, storage config */
1057 arr[num++] = 0x0; /* reserved */
1058 arr[num++] = 0x0;
1059 olen = strlen(na1);
1060 plen = olen + 1;
1061 if (plen % 4)
1062 plen = ((plen / 4) + 1) * 4;
1063 arr[num++] = plen; /* length, null termianted, padded */
1064 memcpy(arr + num, na1, olen);
1065 memset(arr + num + olen, 0, plen - olen);
1066 num += plen;
1067
1068 arr[num++] = 0x4; /* lu, logging */
1069 arr[num++] = 0x0; /* reserved */
1070 arr[num++] = 0x0;
1071 olen = strlen(na2);
1072 plen = olen + 1;
1073 if (plen % 4)
1074 plen = ((plen / 4) + 1) * 4;
1075 arr[num++] = plen; /* length, null terminated, padded */
1076 memcpy(arr + num, na2, olen);
1077 memset(arr + num + olen, 0, plen - olen);
1078 num += plen;
1079
1080 return num;
1081 }
1082
1083 /* SCSI ports VPD page */
1084 static int inquiry_evpd_88(unsigned char * arr, int target_dev_id)
1085 {
1086 int num = 0;
1087 int port_a, port_b;
1088
1089 port_a = target_dev_id + 1;
1090 port_b = port_a + 1;
1091 arr[num++] = 0x0; /* reserved */
1092 arr[num++] = 0x0; /* reserved */
1093 arr[num++] = 0x0;
1094 arr[num++] = 0x1; /* relative port 1 (primary) */
1095 memset(arr + num, 0, 6);
1096 num += 6;
1097 arr[num++] = 0x0;
1098 arr[num++] = 12; /* length tp descriptor */
1099 /* naa-5 target port identifier (A) */
1100 arr[num++] = 0x61; /* proto=sas, binary */
1101 arr[num++] = 0x93; /* PIV=1, target port, NAA */
1102 arr[num++] = 0x0; /* reserved */
1103 arr[num++] = 0x8; /* length */
1104 arr[num++] = 0x52; /* NAA-5, company_id=0x222222 (fake) */
1105 arr[num++] = 0x22;
1106 arr[num++] = 0x22;
1107 arr[num++] = 0x20;
1108 arr[num++] = (port_a >> 24);
1109 arr[num++] = (port_a >> 16) & 0xff;
1110 arr[num++] = (port_a >> 8) & 0xff;
1111 arr[num++] = port_a & 0xff;
1112
1113 arr[num++] = 0x0; /* reserved */
1114 arr[num++] = 0x0; /* reserved */
1115 arr[num++] = 0x0;
1116 arr[num++] = 0x2; /* relative port 2 (secondary) */
1117 memset(arr + num, 0, 6);
1118 num += 6;
1119 arr[num++] = 0x0;
1120 arr[num++] = 12; /* length tp descriptor */
1121 /* naa-5 target port identifier (B) */
1122 arr[num++] = 0x61; /* proto=sas, binary */
1123 arr[num++] = 0x93; /* PIV=1, target port, NAA */
1124 arr[num++] = 0x0; /* reserved */
1125 arr[num++] = 0x8; /* length */
1126 arr[num++] = 0x52; /* NAA-5, company_id=0x222222 (fake) */
1127 arr[num++] = 0x22;
1128 arr[num++] = 0x22;
1129 arr[num++] = 0x20;
1130 arr[num++] = (port_b >> 24);
1131 arr[num++] = (port_b >> 16) & 0xff;
1132 arr[num++] = (port_b >> 8) & 0xff;
1133 arr[num++] = port_b & 0xff;
1134
1135 return num;
1136 }
1137
1138
1139 static unsigned char vpd89_data[] = {
1140 /* from 4th byte */ 0,0,0,0,
1141 'l','i','n','u','x',' ',' ',' ',
1142 'S','A','T',' ','s','c','s','i','_','d','e','b','u','g',' ',' ',
1143 '1','2','3','4',
1144 0x34,0,0,0,1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,
1145 0xec,0,0,0,
1146 0x5a,0xc,0xff,0x3f,0x37,0xc8,0x10,0,0,0,0,0,0x3f,0,0,0,
1147 0,0,0,0,0x58,0x58,0x58,0x58,0x58,0x58,0x58,0x58,0x20,0x20,0x20,0x20,
1148 0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0,0,0,0x40,0x4,0,0x2e,0x33,
1149 0x38,0x31,0x20,0x20,0x20,0x20,0x54,0x53,0x38,0x33,0x30,0x30,0x33,0x31,
1150 0x53,0x41,
1151 0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,
1152 0x20,0x20,
1153 0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,
1154 0x10,0x80,
1155 0,0,0,0x2f,0,0,0,0x2,0,0x2,0x7,0,0xff,0xff,0x1,0,
1156 0x3f,0,0xc1,0xff,0x3e,0,0x10,0x1,0xb0,0xf8,0x50,0x9,0,0,0x7,0,
1157 0x3,0,0x78,0,0x78,0,0xf0,0,0x78,0,0,0,0,0,0,0,
1158 0,0,0,0,0,0,0,0,0x2,0,0,0,0,0,0,0,
1159 0x7e,0,0x1b,0,0x6b,0x34,0x1,0x7d,0x3,0x40,0x69,0x34,0x1,0x3c,0x3,0x40,
1160 0x7f,0x40,0,0,0,0,0xfe,0xfe,0,0,0,0,0,0xfe,0,0,
1161 0,0,0,0,0,0,0,0,0xb0,0xf8,0x50,0x9,0,0,0,0,
1162 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1163 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1164 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1165 0x1,0,0xb0,0xf8,0x50,0x9,0xb0,0xf8,0x50,0x9,0x20,0x20,0x2,0,0xb6,0x42,
1166 0,0x80,0x8a,0,0x6,0x3c,0xa,0x3c,0xff,0xff,0xc6,0x7,0,0x1,0,0x8,
1167 0xf0,0xf,0,0x10,0x2,0,0x30,0,0,0,0,0,0,0,0x6,0xfe,
1168 0,0,0x2,0,0x50,0,0x8a,0,0x4f,0x95,0,0,0x21,0,0xb,0,
1169 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1170 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1171 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1172 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1173 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1174 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1175 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1176 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1177 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1178 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1179 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1180 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0xa5,0x51,
1181 };
1182
1183 /* ATA Information VPD page */
1184 static int inquiry_evpd_89(unsigned char * arr)
1185 {
1186 memcpy(arr, vpd89_data, sizeof(vpd89_data));
1187 return sizeof(vpd89_data);
1188 }
1189
1190
1191 static unsigned char vpdb0_data[] = {
1192 /* from 4th byte */ 0,0,0,4, 0,0,0x4,0, 0,0,0,64,
1193 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1194 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1195 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1196 };
1197
1198 /* Block limits VPD page (SBC-3) */
1199 static int inquiry_evpd_b0(unsigned char * arr)
1200 {
1201 unsigned int gran;
1202
1203 memcpy(arr, vpdb0_data, sizeof(vpdb0_data));
1204
1205 /* Optimal transfer length granularity */
1206 gran = 1 << scsi_debug_physblk_exp;
1207 arr[2] = (gran >> 8) & 0xff;
1208 arr[3] = gran & 0xff;
1209
1210 /* Maximum Transfer Length */
1211 if (sdebug_store_sectors > 0x400) {
1212 arr[4] = (sdebug_store_sectors >> 24) & 0xff;
1213 arr[5] = (sdebug_store_sectors >> 16) & 0xff;
1214 arr[6] = (sdebug_store_sectors >> 8) & 0xff;
1215 arr[7] = sdebug_store_sectors & 0xff;
1216 }
1217
1218 /* Optimal Transfer Length */
1219 put_unaligned_be32(scsi_debug_opt_blks, &arr[8]);
1220
1221 if (scsi_debug_lbpu) {
1222 /* Maximum Unmap LBA Count */
1223 put_unaligned_be32(scsi_debug_unmap_max_blocks, &arr[16]);
1224
1225 /* Maximum Unmap Block Descriptor Count */
1226 put_unaligned_be32(scsi_debug_unmap_max_desc, &arr[20]);
1227 }
1228
1229 /* Unmap Granularity Alignment */
1230 if (scsi_debug_unmap_alignment) {
1231 put_unaligned_be32(scsi_debug_unmap_alignment, &arr[28]);
1232 arr[28] |= 0x80; /* UGAVALID */
1233 }
1234
1235 /* Optimal Unmap Granularity */
1236 put_unaligned_be32(scsi_debug_unmap_granularity, &arr[24]);
1237
1238 /* Maximum WRITE SAME Length */
1239 put_unaligned_be64(scsi_debug_write_same_length, &arr[32]);
1240
1241 return 0x3c; /* Mandatory page length for Logical Block Provisioning */
1242
1243 return sizeof(vpdb0_data);
1244 }
1245
1246 /* Block device characteristics VPD page (SBC-3) */
1247 static int inquiry_evpd_b1(unsigned char *arr)
1248 {
1249 memset(arr, 0, 0x3c);
1250 arr[0] = 0;
1251 arr[1] = 1; /* non rotating medium (e.g. solid state) */
1252 arr[2] = 0;
1253 arr[3] = 5; /* less than 1.8" */
1254
1255 return 0x3c;
1256 }
1257
1258 /* Logical block provisioning VPD page (SBC-3) */
1259 static int inquiry_evpd_b2(unsigned char *arr)
1260 {
1261 memset(arr, 0, 0x4);
1262 arr[0] = 0; /* threshold exponent */
1263
1264 if (scsi_debug_lbpu)
1265 arr[1] = 1 << 7;
1266
1267 if (scsi_debug_lbpws)
1268 arr[1] |= 1 << 6;
1269
1270 if (scsi_debug_lbpws10)
1271 arr[1] |= 1 << 5;
1272
1273 if (scsi_debug_lbprz)
1274 arr[1] |= 1 << 2;
1275
1276 return 0x4;
1277 }
1278
1279 #define SDEBUG_LONG_INQ_SZ 96
1280 #define SDEBUG_MAX_INQ_ARR_SZ 584
1281
1282 static int resp_inquiry(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
1283 {
1284 unsigned char pq_pdt;
1285 unsigned char * arr;
1286 unsigned char *cmd = scp->cmnd;
1287 int alloc_len, n, ret;
1288 bool have_wlun;
1289
1290 alloc_len = (cmd[3] << 8) + cmd[4];
1291 arr = kzalloc(SDEBUG_MAX_INQ_ARR_SZ, GFP_ATOMIC);
1292 if (! arr)
1293 return DID_REQUEUE << 16;
1294 have_wlun = (scp->device->lun == SCSI_W_LUN_REPORT_LUNS);
1295 if (have_wlun)
1296 pq_pdt = 0x1e; /* present, wlun */
1297 else if (scsi_debug_no_lun_0 && (0 == devip->lun))
1298 pq_pdt = 0x7f; /* not present, no device type */
1299 else
1300 pq_pdt = (scsi_debug_ptype & 0x1f);
1301 arr[0] = pq_pdt;
1302 if (0x2 & cmd[1]) { /* CMDDT bit set */
1303 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 1);
1304 kfree(arr);
1305 return check_condition_result;
1306 } else if (0x1 & cmd[1]) { /* EVPD bit set */
1307 int lu_id_num, port_group_id, target_dev_id, len;
1308 char lu_id_str[6];
1309 int host_no = devip->sdbg_host->shost->host_no;
1310
1311 port_group_id = (((host_no + 1) & 0x7f) << 8) +
1312 (devip->channel & 0x7f);
1313 if (0 == scsi_debug_vpd_use_hostno)
1314 host_no = 0;
1315 lu_id_num = have_wlun ? -1 : (((host_no + 1) * 2000) +
1316 (devip->target * 1000) + devip->lun);
1317 target_dev_id = ((host_no + 1) * 2000) +
1318 (devip->target * 1000) - 3;
1319 len = scnprintf(lu_id_str, 6, "%d", lu_id_num);
1320 if (0 == cmd[2]) { /* supported vital product data pages */
1321 arr[1] = cmd[2]; /*sanity */
1322 n = 4;
1323 arr[n++] = 0x0; /* this page */
1324 arr[n++] = 0x80; /* unit serial number */
1325 arr[n++] = 0x83; /* device identification */
1326 arr[n++] = 0x84; /* software interface ident. */
1327 arr[n++] = 0x85; /* management network addresses */
1328 arr[n++] = 0x86; /* extended inquiry */
1329 arr[n++] = 0x87; /* mode page policy */
1330 arr[n++] = 0x88; /* SCSI ports */
1331 arr[n++] = 0x89; /* ATA information */
1332 arr[n++] = 0xb0; /* Block limits (SBC) */
1333 arr[n++] = 0xb1; /* Block characteristics (SBC) */
1334 if (scsi_debug_lbp()) /* Logical Block Prov. (SBC) */
1335 arr[n++] = 0xb2;
1336 arr[3] = n - 4; /* number of supported VPD pages */
1337 } else if (0x80 == cmd[2]) { /* unit serial number */
1338 arr[1] = cmd[2]; /*sanity */
1339 arr[3] = len;
1340 memcpy(&arr[4], lu_id_str, len);
1341 } else if (0x83 == cmd[2]) { /* device identification */
1342 arr[1] = cmd[2]; /*sanity */
1343 arr[3] = inquiry_evpd_83(&arr[4], port_group_id,
1344 target_dev_id, lu_id_num,
1345 lu_id_str, len);
1346 } else if (0x84 == cmd[2]) { /* Software interface ident. */
1347 arr[1] = cmd[2]; /*sanity */
1348 arr[3] = inquiry_evpd_84(&arr[4]);
1349 } else if (0x85 == cmd[2]) { /* Management network addresses */
1350 arr[1] = cmd[2]; /*sanity */
1351 arr[3] = inquiry_evpd_85(&arr[4]);
1352 } else if (0x86 == cmd[2]) { /* extended inquiry */
1353 arr[1] = cmd[2]; /*sanity */
1354 arr[3] = 0x3c; /* number of following entries */
1355 if (scsi_debug_dif == SD_DIF_TYPE3_PROTECTION)
1356 arr[4] = 0x4; /* SPT: GRD_CHK:1 */
1357 else if (scsi_debug_dif)
1358 arr[4] = 0x5; /* SPT: GRD_CHK:1, REF_CHK:1 */
1359 else
1360 arr[4] = 0x0; /* no protection stuff */
1361 arr[5] = 0x7; /* head of q, ordered + simple q's */
1362 } else if (0x87 == cmd[2]) { /* mode page policy */
1363 arr[1] = cmd[2]; /*sanity */
1364 arr[3] = 0x8; /* number of following entries */
1365 arr[4] = 0x2; /* disconnect-reconnect mp */
1366 arr[6] = 0x80; /* mlus, shared */
1367 arr[8] = 0x18; /* protocol specific lu */
1368 arr[10] = 0x82; /* mlus, per initiator port */
1369 } else if (0x88 == cmd[2]) { /* SCSI Ports */
1370 arr[1] = cmd[2]; /*sanity */
1371 arr[3] = inquiry_evpd_88(&arr[4], target_dev_id);
1372 } else if (0x89 == cmd[2]) { /* ATA information */
1373 arr[1] = cmd[2]; /*sanity */
1374 n = inquiry_evpd_89(&arr[4]);
1375 arr[2] = (n >> 8);
1376 arr[3] = (n & 0xff);
1377 } else if (0xb0 == cmd[2]) { /* Block limits (SBC) */
1378 arr[1] = cmd[2]; /*sanity */
1379 arr[3] = inquiry_evpd_b0(&arr[4]);
1380 } else if (0xb1 == cmd[2]) { /* Block characteristics (SBC) */
1381 arr[1] = cmd[2]; /*sanity */
1382 arr[3] = inquiry_evpd_b1(&arr[4]);
1383 } else if (0xb2 == cmd[2]) { /* Logical Block Prov. (SBC) */
1384 arr[1] = cmd[2]; /*sanity */
1385 arr[3] = inquiry_evpd_b2(&arr[4]);
1386 } else {
1387 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, -1);
1388 kfree(arr);
1389 return check_condition_result;
1390 }
1391 len = min(((arr[2] << 8) + arr[3]) + 4, alloc_len);
1392 ret = fill_from_dev_buffer(scp, arr,
1393 min(len, SDEBUG_MAX_INQ_ARR_SZ));
1394 kfree(arr);
1395 return ret;
1396 }
1397 /* drops through here for a standard inquiry */
1398 arr[1] = scsi_debug_removable ? 0x80 : 0; /* Removable disk */
1399 arr[2] = scsi_debug_scsi_level;
1400 arr[3] = 2; /* response_data_format==2 */
1401 arr[4] = SDEBUG_LONG_INQ_SZ - 5;
1402 arr[5] = scsi_debug_dif ? 1 : 0; /* PROTECT bit */
1403 if (0 == scsi_debug_vpd_use_hostno)
1404 arr[5] = 0x10; /* claim: implicit TGPS */
1405 arr[6] = 0x10; /* claim: MultiP */
1406 /* arr[6] |= 0x40; ... claim: EncServ (enclosure services) */
1407 arr[7] = 0xa; /* claim: LINKED + CMDQUE */
1408 memcpy(&arr[8], inq_vendor_id, 8);
1409 memcpy(&arr[16], inq_product_id, 16);
1410 memcpy(&arr[32], inq_product_rev, 4);
1411 /* version descriptors (2 bytes each) follow */
1412 arr[58] = 0x0; arr[59] = 0xa2; /* SAM-5 rev 4 */
1413 arr[60] = 0x4; arr[61] = 0x68; /* SPC-4 rev 37 */
1414 n = 62;
1415 if (scsi_debug_ptype == 0) {
1416 arr[n++] = 0x4; arr[n++] = 0xc5; /* SBC-4 rev 36 */
1417 } else if (scsi_debug_ptype == 1) {
1418 arr[n++] = 0x5; arr[n++] = 0x25; /* SSC-4 rev 3 */
1419 }
1420 arr[n++] = 0x20; arr[n++] = 0xe6; /* SPL-3 rev 7 */
1421 ret = fill_from_dev_buffer(scp, arr,
1422 min(alloc_len, SDEBUG_LONG_INQ_SZ));
1423 kfree(arr);
1424 return ret;
1425 }
1426
1427 static int resp_requests(struct scsi_cmnd * scp,
1428 struct sdebug_dev_info * devip)
1429 {
1430 unsigned char * sbuff;
1431 unsigned char *cmd = scp->cmnd;
1432 unsigned char arr[SCSI_SENSE_BUFFERSIZE];
1433 bool dsense;
1434 int len = 18;
1435
1436 memset(arr, 0, sizeof(arr));
1437 dsense = !!(cmd[1] & 1);
1438 sbuff = scp->sense_buffer;
1439 if ((iec_m_pg[2] & 0x4) && (6 == (iec_m_pg[3] & 0xf))) {
1440 if (dsense) {
1441 arr[0] = 0x72;
1442 arr[1] = 0x0; /* NO_SENSE in sense_key */
1443 arr[2] = THRESHOLD_EXCEEDED;
1444 arr[3] = 0xff; /* TEST set and MRIE==6 */
1445 len = 8;
1446 } else {
1447 arr[0] = 0x70;
1448 arr[2] = 0x0; /* NO_SENSE in sense_key */
1449 arr[7] = 0xa; /* 18 byte sense buffer */
1450 arr[12] = THRESHOLD_EXCEEDED;
1451 arr[13] = 0xff; /* TEST set and MRIE==6 */
1452 }
1453 } else {
1454 memcpy(arr, sbuff, SCSI_SENSE_BUFFERSIZE);
1455 if (arr[0] >= 0x70 && dsense == scsi_debug_dsense)
1456 ; /* have sense and formats match */
1457 else if (arr[0] <= 0x70) {
1458 if (dsense) {
1459 memset(arr, 0, 8);
1460 arr[0] = 0x72;
1461 len = 8;
1462 } else {
1463 memset(arr, 0, 18);
1464 arr[0] = 0x70;
1465 arr[7] = 0xa;
1466 }
1467 } else if (dsense) {
1468 memset(arr, 0, 8);
1469 arr[0] = 0x72;
1470 arr[1] = sbuff[2]; /* sense key */
1471 arr[2] = sbuff[12]; /* asc */
1472 arr[3] = sbuff[13]; /* ascq */
1473 len = 8;
1474 } else {
1475 memset(arr, 0, 18);
1476 arr[0] = 0x70;
1477 arr[2] = sbuff[1];
1478 arr[7] = 0xa;
1479 arr[12] = sbuff[1];
1480 arr[13] = sbuff[3];
1481 }
1482
1483 }
1484 mk_sense_buffer(scp, 0, NO_ADDITIONAL_SENSE, 0);
1485 return fill_from_dev_buffer(scp, arr, len);
1486 }
1487
1488 static int resp_start_stop(struct scsi_cmnd * scp,
1489 struct sdebug_dev_info * devip)
1490 {
1491 unsigned char *cmd = scp->cmnd;
1492 int power_cond, start;
1493
1494 power_cond = (cmd[4] & 0xf0) >> 4;
1495 if (power_cond) {
1496 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 4, 7);
1497 return check_condition_result;
1498 }
1499 start = cmd[4] & 1;
1500 if (start == devip->stopped)
1501 devip->stopped = !start;
1502 return 0;
1503 }
1504
1505 static sector_t get_sdebug_capacity(void)
1506 {
1507 if (scsi_debug_virtual_gb > 0)
1508 return (sector_t)scsi_debug_virtual_gb *
1509 (1073741824 / scsi_debug_sector_size);
1510 else
1511 return sdebug_store_sectors;
1512 }
1513
1514 #define SDEBUG_READCAP_ARR_SZ 8
1515 static int resp_readcap(struct scsi_cmnd * scp,
1516 struct sdebug_dev_info * devip)
1517 {
1518 unsigned char arr[SDEBUG_READCAP_ARR_SZ];
1519 unsigned int capac;
1520
1521 /* following just in case virtual_gb changed */
1522 sdebug_capacity = get_sdebug_capacity();
1523 memset(arr, 0, SDEBUG_READCAP_ARR_SZ);
1524 if (sdebug_capacity < 0xffffffff) {
1525 capac = (unsigned int)sdebug_capacity - 1;
1526 arr[0] = (capac >> 24);
1527 arr[1] = (capac >> 16) & 0xff;
1528 arr[2] = (capac >> 8) & 0xff;
1529 arr[3] = capac & 0xff;
1530 } else {
1531 arr[0] = 0xff;
1532 arr[1] = 0xff;
1533 arr[2] = 0xff;
1534 arr[3] = 0xff;
1535 }
1536 arr[6] = (scsi_debug_sector_size >> 8) & 0xff;
1537 arr[7] = scsi_debug_sector_size & 0xff;
1538 return fill_from_dev_buffer(scp, arr, SDEBUG_READCAP_ARR_SZ);
1539 }
1540
1541 #define SDEBUG_READCAP16_ARR_SZ 32
1542 static int resp_readcap16(struct scsi_cmnd * scp,
1543 struct sdebug_dev_info * devip)
1544 {
1545 unsigned char *cmd = scp->cmnd;
1546 unsigned char arr[SDEBUG_READCAP16_ARR_SZ];
1547 unsigned long long capac;
1548 int k, alloc_len;
1549
1550 alloc_len = ((cmd[10] << 24) + (cmd[11] << 16) + (cmd[12] << 8)
1551 + cmd[13]);
1552 /* following just in case virtual_gb changed */
1553 sdebug_capacity = get_sdebug_capacity();
1554 memset(arr, 0, SDEBUG_READCAP16_ARR_SZ);
1555 capac = sdebug_capacity - 1;
1556 for (k = 0; k < 8; ++k, capac >>= 8)
1557 arr[7 - k] = capac & 0xff;
1558 arr[8] = (scsi_debug_sector_size >> 24) & 0xff;
1559 arr[9] = (scsi_debug_sector_size >> 16) & 0xff;
1560 arr[10] = (scsi_debug_sector_size >> 8) & 0xff;
1561 arr[11] = scsi_debug_sector_size & 0xff;
1562 arr[13] = scsi_debug_physblk_exp & 0xf;
1563 arr[14] = (scsi_debug_lowest_aligned >> 8) & 0x3f;
1564
1565 if (scsi_debug_lbp()) {
1566 arr[14] |= 0x80; /* LBPME */
1567 if (scsi_debug_lbprz)
1568 arr[14] |= 0x40; /* LBPRZ */
1569 }
1570
1571 arr[15] = scsi_debug_lowest_aligned & 0xff;
1572
1573 if (scsi_debug_dif) {
1574 arr[12] = (scsi_debug_dif - 1) << 1; /* P_TYPE */
1575 arr[12] |= 1; /* PROT_EN */
1576 }
1577
1578 return fill_from_dev_buffer(scp, arr,
1579 min(alloc_len, SDEBUG_READCAP16_ARR_SZ));
1580 }
1581
1582 #define SDEBUG_MAX_TGTPGS_ARR_SZ 1412
1583
1584 static int resp_report_tgtpgs(struct scsi_cmnd * scp,
1585 struct sdebug_dev_info * devip)
1586 {
1587 unsigned char *cmd = scp->cmnd;
1588 unsigned char * arr;
1589 int host_no = devip->sdbg_host->shost->host_no;
1590 int n, ret, alen, rlen;
1591 int port_group_a, port_group_b, port_a, port_b;
1592
1593 alen = ((cmd[6] << 24) + (cmd[7] << 16) + (cmd[8] << 8)
1594 + cmd[9]);
1595
1596 arr = kzalloc(SDEBUG_MAX_TGTPGS_ARR_SZ, GFP_ATOMIC);
1597 if (! arr)
1598 return DID_REQUEUE << 16;
1599 /*
1600 * EVPD page 0x88 states we have two ports, one
1601 * real and a fake port with no device connected.
1602 * So we create two port groups with one port each
1603 * and set the group with port B to unavailable.
1604 */
1605 port_a = 0x1; /* relative port A */
1606 port_b = 0x2; /* relative port B */
1607 port_group_a = (((host_no + 1) & 0x7f) << 8) +
1608 (devip->channel & 0x7f);
1609 port_group_b = (((host_no + 1) & 0x7f) << 8) +
1610 (devip->channel & 0x7f) + 0x80;
1611
1612 /*
1613 * The asymmetric access state is cycled according to the host_id.
1614 */
1615 n = 4;
1616 if (0 == scsi_debug_vpd_use_hostno) {
1617 arr[n++] = host_no % 3; /* Asymm access state */
1618 arr[n++] = 0x0F; /* claim: all states are supported */
1619 } else {
1620 arr[n++] = 0x0; /* Active/Optimized path */
1621 arr[n++] = 0x01; /* claim: only support active/optimized paths */
1622 }
1623 arr[n++] = (port_group_a >> 8) & 0xff;
1624 arr[n++] = port_group_a & 0xff;
1625 arr[n++] = 0; /* Reserved */
1626 arr[n++] = 0; /* Status code */
1627 arr[n++] = 0; /* Vendor unique */
1628 arr[n++] = 0x1; /* One port per group */
1629 arr[n++] = 0; /* Reserved */
1630 arr[n++] = 0; /* Reserved */
1631 arr[n++] = (port_a >> 8) & 0xff;
1632 arr[n++] = port_a & 0xff;
1633 arr[n++] = 3; /* Port unavailable */
1634 arr[n++] = 0x08; /* claim: only unavailalbe paths are supported */
1635 arr[n++] = (port_group_b >> 8) & 0xff;
1636 arr[n++] = port_group_b & 0xff;
1637 arr[n++] = 0; /* Reserved */
1638 arr[n++] = 0; /* Status code */
1639 arr[n++] = 0; /* Vendor unique */
1640 arr[n++] = 0x1; /* One port per group */
1641 arr[n++] = 0; /* Reserved */
1642 arr[n++] = 0; /* Reserved */
1643 arr[n++] = (port_b >> 8) & 0xff;
1644 arr[n++] = port_b & 0xff;
1645
1646 rlen = n - 4;
1647 arr[0] = (rlen >> 24) & 0xff;
1648 arr[1] = (rlen >> 16) & 0xff;
1649 arr[2] = (rlen >> 8) & 0xff;
1650 arr[3] = rlen & 0xff;
1651
1652 /*
1653 * Return the smallest value of either
1654 * - The allocated length
1655 * - The constructed command length
1656 * - The maximum array size
1657 */
1658 rlen = min(alen,n);
1659 ret = fill_from_dev_buffer(scp, arr,
1660 min(rlen, SDEBUG_MAX_TGTPGS_ARR_SZ));
1661 kfree(arr);
1662 return ret;
1663 }
1664
1665 static int
1666 resp_rsup_opcodes(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
1667 {
1668 bool rctd;
1669 u8 reporting_opts, req_opcode, sdeb_i, supp;
1670 u16 req_sa, u;
1671 u32 alloc_len, a_len;
1672 int k, offset, len, errsts, count, bump, na;
1673 const struct opcode_info_t *oip;
1674 const struct opcode_info_t *r_oip;
1675 u8 *arr;
1676 u8 *cmd = scp->cmnd;
1677
1678 rctd = !!(cmd[2] & 0x80);
1679 reporting_opts = cmd[2] & 0x7;
1680 req_opcode = cmd[3];
1681 req_sa = get_unaligned_be16(cmd + 4);
1682 alloc_len = get_unaligned_be32(cmd + 6);
1683 if (alloc_len < 4 || alloc_len > 0xffff) {
1684 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 6, -1);
1685 return check_condition_result;
1686 }
1687 if (alloc_len > 8192)
1688 a_len = 8192;
1689 else
1690 a_len = alloc_len;
1691 arr = kzalloc((a_len < 256) ? 320 : a_len + 64, GFP_ATOMIC);
1692 if (NULL == arr) {
1693 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
1694 INSUFF_RES_ASCQ);
1695 return check_condition_result;
1696 }
1697 switch (reporting_opts) {
1698 case 0: /* all commands */
1699 /* count number of commands */
1700 for (count = 0, oip = opcode_info_arr;
1701 oip->num_attached != 0xff; ++oip) {
1702 if (F_INV_OP & oip->flags)
1703 continue;
1704 count += (oip->num_attached + 1);
1705 }
1706 bump = rctd ? 20 : 8;
1707 put_unaligned_be32(count * bump, arr);
1708 for (offset = 4, oip = opcode_info_arr;
1709 oip->num_attached != 0xff && offset < a_len; ++oip) {
1710 if (F_INV_OP & oip->flags)
1711 continue;
1712 na = oip->num_attached;
1713 arr[offset] = oip->opcode;
1714 put_unaligned_be16(oip->sa, arr + offset + 2);
1715 if (rctd)
1716 arr[offset + 5] |= 0x2;
1717 if (FF_SA & oip->flags)
1718 arr[offset + 5] |= 0x1;
1719 put_unaligned_be16(oip->len_mask[0], arr + offset + 6);
1720 if (rctd)
1721 put_unaligned_be16(0xa, arr + offset + 8);
1722 r_oip = oip;
1723 for (k = 0, oip = oip->arrp; k < na; ++k, ++oip) {
1724 if (F_INV_OP & oip->flags)
1725 continue;
1726 offset += bump;
1727 arr[offset] = oip->opcode;
1728 put_unaligned_be16(oip->sa, arr + offset + 2);
1729 if (rctd)
1730 arr[offset + 5] |= 0x2;
1731 if (FF_SA & oip->flags)
1732 arr[offset + 5] |= 0x1;
1733 put_unaligned_be16(oip->len_mask[0],
1734 arr + offset + 6);
1735 if (rctd)
1736 put_unaligned_be16(0xa,
1737 arr + offset + 8);
1738 }
1739 oip = r_oip;
1740 offset += bump;
1741 }
1742 break;
1743 case 1: /* one command: opcode only */
1744 case 2: /* one command: opcode plus service action */
1745 case 3: /* one command: if sa==0 then opcode only else opcode+sa */
1746 sdeb_i = opcode_ind_arr[req_opcode];
1747 oip = &opcode_info_arr[sdeb_i];
1748 if (F_INV_OP & oip->flags) {
1749 supp = 1;
1750 offset = 4;
1751 } else {
1752 if (1 == reporting_opts) {
1753 if (FF_SA & oip->flags) {
1754 mk_sense_invalid_fld(scp, SDEB_IN_CDB,
1755 2, 2);
1756 kfree(arr);
1757 return check_condition_result;
1758 }
1759 req_sa = 0;
1760 } else if (2 == reporting_opts &&
1761 0 == (FF_SA & oip->flags)) {
1762 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 4, -1);
1763 kfree(arr); /* point at requested sa */
1764 return check_condition_result;
1765 }
1766 if (0 == (FF_SA & oip->flags) &&
1767 req_opcode == oip->opcode)
1768 supp = 3;
1769 else if (0 == (FF_SA & oip->flags)) {
1770 na = oip->num_attached;
1771 for (k = 0, oip = oip->arrp; k < na;
1772 ++k, ++oip) {
1773 if (req_opcode == oip->opcode)
1774 break;
1775 }
1776 supp = (k >= na) ? 1 : 3;
1777 } else if (req_sa != oip->sa) {
1778 na = oip->num_attached;
1779 for (k = 0, oip = oip->arrp; k < na;
1780 ++k, ++oip) {
1781 if (req_sa == oip->sa)
1782 break;
1783 }
1784 supp = (k >= na) ? 1 : 3;
1785 } else
1786 supp = 3;
1787 if (3 == supp) {
1788 u = oip->len_mask[0];
1789 put_unaligned_be16(u, arr + 2);
1790 arr[4] = oip->opcode;
1791 for (k = 1; k < u; ++k)
1792 arr[4 + k] = (k < 16) ?
1793 oip->len_mask[k] : 0xff;
1794 offset = 4 + u;
1795 } else
1796 offset = 4;
1797 }
1798 arr[1] = (rctd ? 0x80 : 0) | supp;
1799 if (rctd) {
1800 put_unaligned_be16(0xa, arr + offset);
1801 offset += 12;
1802 }
1803 break;
1804 default:
1805 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 2);
1806 kfree(arr);
1807 return check_condition_result;
1808 }
1809 offset = (offset < a_len) ? offset : a_len;
1810 len = (offset < alloc_len) ? offset : alloc_len;
1811 errsts = fill_from_dev_buffer(scp, arr, len);
1812 kfree(arr);
1813 return errsts;
1814 }
1815
1816 static int
1817 resp_rsup_tmfs(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
1818 {
1819 bool repd;
1820 u32 alloc_len, len;
1821 u8 arr[16];
1822 u8 *cmd = scp->cmnd;
1823
1824 memset(arr, 0, sizeof(arr));
1825 repd = !!(cmd[2] & 0x80);
1826 alloc_len = get_unaligned_be32(cmd + 6);
1827 if (alloc_len < 4) {
1828 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 6, -1);
1829 return check_condition_result;
1830 }
1831 arr[0] = 0xc8; /* ATS | ATSS | LURS */
1832 arr[1] = 0x1; /* ITNRS */
1833 if (repd) {
1834 arr[3] = 0xc;
1835 len = 16;
1836 } else
1837 len = 4;
1838
1839 len = (len < alloc_len) ? len : alloc_len;
1840 return fill_from_dev_buffer(scp, arr, len);
1841 }
1842
1843 /* <<Following mode page info copied from ST318451LW>> */
1844
1845 static int resp_err_recov_pg(unsigned char * p, int pcontrol, int target)
1846 { /* Read-Write Error Recovery page for mode_sense */
1847 unsigned char err_recov_pg[] = {0x1, 0xa, 0xc0, 11, 240, 0, 0, 0,
1848 5, 0, 0xff, 0xff};
1849
1850 memcpy(p, err_recov_pg, sizeof(err_recov_pg));
1851 if (1 == pcontrol)
1852 memset(p + 2, 0, sizeof(err_recov_pg) - 2);
1853 return sizeof(err_recov_pg);
1854 }
1855
1856 static int resp_disconnect_pg(unsigned char * p, int pcontrol, int target)
1857 { /* Disconnect-Reconnect page for mode_sense */
1858 unsigned char disconnect_pg[] = {0x2, 0xe, 128, 128, 0, 10, 0, 0,
1859 0, 0, 0, 0, 0, 0, 0, 0};
1860
1861 memcpy(p, disconnect_pg, sizeof(disconnect_pg));
1862 if (1 == pcontrol)
1863 memset(p + 2, 0, sizeof(disconnect_pg) - 2);
1864 return sizeof(disconnect_pg);
1865 }
1866
1867 static int resp_format_pg(unsigned char * p, int pcontrol, int target)
1868 { /* Format device page for mode_sense */
1869 unsigned char format_pg[] = {0x3, 0x16, 0, 0, 0, 0, 0, 0,
1870 0, 0, 0, 0, 0, 0, 0, 0,
1871 0, 0, 0, 0, 0x40, 0, 0, 0};
1872
1873 memcpy(p, format_pg, sizeof(format_pg));
1874 p[10] = (sdebug_sectors_per >> 8) & 0xff;
1875 p[11] = sdebug_sectors_per & 0xff;
1876 p[12] = (scsi_debug_sector_size >> 8) & 0xff;
1877 p[13] = scsi_debug_sector_size & 0xff;
1878 if (scsi_debug_removable)
1879 p[20] |= 0x20; /* should agree with INQUIRY */
1880 if (1 == pcontrol)
1881 memset(p + 2, 0, sizeof(format_pg) - 2);
1882 return sizeof(format_pg);
1883 }
1884
1885 static int resp_caching_pg(unsigned char * p, int pcontrol, int target)
1886 { /* Caching page for mode_sense */
1887 unsigned char ch_caching_pg[] = {/* 0x8, 18, */ 0x4, 0, 0, 0, 0, 0,
1888 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
1889 unsigned char d_caching_pg[] = {0x8, 18, 0x14, 0, 0xff, 0xff, 0, 0,
1890 0xff, 0xff, 0xff, 0xff, 0x80, 0x14, 0, 0, 0, 0, 0, 0};
1891
1892 if (SCSI_DEBUG_OPT_N_WCE & scsi_debug_opts)
1893 caching_pg[2] &= ~0x4; /* set WCE=0 (default WCE=1) */
1894 memcpy(p, caching_pg, sizeof(caching_pg));
1895 if (1 == pcontrol)
1896 memcpy(p + 2, ch_caching_pg, sizeof(ch_caching_pg));
1897 else if (2 == pcontrol)
1898 memcpy(p, d_caching_pg, sizeof(d_caching_pg));
1899 return sizeof(caching_pg);
1900 }
1901
1902 static int resp_ctrl_m_pg(unsigned char * p, int pcontrol, int target)
1903 { /* Control mode page for mode_sense */
1904 unsigned char ch_ctrl_m_pg[] = {/* 0xa, 10, */ 0x6, 0, 0, 0, 0, 0,
1905 0, 0, 0, 0};
1906 unsigned char d_ctrl_m_pg[] = {0xa, 10, 2, 0, 0, 0, 0, 0,
1907 0, 0, 0x2, 0x4b};
1908
1909 if (scsi_debug_dsense)
1910 ctrl_m_pg[2] |= 0x4;
1911 else
1912 ctrl_m_pg[2] &= ~0x4;
1913
1914 if (scsi_debug_ato)
1915 ctrl_m_pg[5] |= 0x80; /* ATO=1 */
1916
1917 memcpy(p, ctrl_m_pg, sizeof(ctrl_m_pg));
1918 if (1 == pcontrol)
1919 memcpy(p + 2, ch_ctrl_m_pg, sizeof(ch_ctrl_m_pg));
1920 else if (2 == pcontrol)
1921 memcpy(p, d_ctrl_m_pg, sizeof(d_ctrl_m_pg));
1922 return sizeof(ctrl_m_pg);
1923 }
1924
1925
1926 static int resp_iec_m_pg(unsigned char * p, int pcontrol, int target)
1927 { /* Informational Exceptions control mode page for mode_sense */
1928 unsigned char ch_iec_m_pg[] = {/* 0x1c, 0xa, */ 0x4, 0xf, 0, 0, 0, 0,
1929 0, 0, 0x0, 0x0};
1930 unsigned char d_iec_m_pg[] = {0x1c, 0xa, 0x08, 0, 0, 0, 0, 0,
1931 0, 0, 0x0, 0x0};
1932
1933 memcpy(p, iec_m_pg, sizeof(iec_m_pg));
1934 if (1 == pcontrol)
1935 memcpy(p + 2, ch_iec_m_pg, sizeof(ch_iec_m_pg));
1936 else if (2 == pcontrol)
1937 memcpy(p, d_iec_m_pg, sizeof(d_iec_m_pg));
1938 return sizeof(iec_m_pg);
1939 }
1940
1941 static int resp_sas_sf_m_pg(unsigned char * p, int pcontrol, int target)
1942 { /* SAS SSP mode page - short format for mode_sense */
1943 unsigned char sas_sf_m_pg[] = {0x19, 0x6,
1944 0x6, 0x0, 0x7, 0xd0, 0x0, 0x0};
1945
1946 memcpy(p, sas_sf_m_pg, sizeof(sas_sf_m_pg));
1947 if (1 == pcontrol)
1948 memset(p + 2, 0, sizeof(sas_sf_m_pg) - 2);
1949 return sizeof(sas_sf_m_pg);
1950 }
1951
1952
1953 static int resp_sas_pcd_m_spg(unsigned char * p, int pcontrol, int target,
1954 int target_dev_id)
1955 { /* SAS phy control and discover mode page for mode_sense */
1956 unsigned char sas_pcd_m_pg[] = {0x59, 0x1, 0, 0x64, 0, 0x6, 0, 2,
1957 0, 0, 0, 0, 0x10, 0x9, 0x8, 0x0,
1958 0x52, 0x22, 0x22, 0x20, 0x0, 0x0, 0x0, 0x0,
1959 0x51, 0x11, 0x11, 0x10, 0x0, 0x0, 0x0, 0x1,
1960 0x2, 0, 0, 0, 0, 0, 0, 0,
1961 0x88, 0x99, 0, 0, 0, 0, 0, 0,
1962 0, 0, 0, 0, 0, 0, 0, 0,
1963 0, 1, 0, 0, 0x10, 0x9, 0x8, 0x0,
1964 0x52, 0x22, 0x22, 0x20, 0x0, 0x0, 0x0, 0x0,
1965 0x51, 0x11, 0x11, 0x10, 0x0, 0x0, 0x0, 0x1,
1966 0x3, 0, 0, 0, 0, 0, 0, 0,
1967 0x88, 0x99, 0, 0, 0, 0, 0, 0,
1968 0, 0, 0, 0, 0, 0, 0, 0,
1969 };
1970 int port_a, port_b;
1971
1972 port_a = target_dev_id + 1;
1973 port_b = port_a + 1;
1974 memcpy(p, sas_pcd_m_pg, sizeof(sas_pcd_m_pg));
1975 p[20] = (port_a >> 24);
1976 p[21] = (port_a >> 16) & 0xff;
1977 p[22] = (port_a >> 8) & 0xff;
1978 p[23] = port_a & 0xff;
1979 p[48 + 20] = (port_b >> 24);
1980 p[48 + 21] = (port_b >> 16) & 0xff;
1981 p[48 + 22] = (port_b >> 8) & 0xff;
1982 p[48 + 23] = port_b & 0xff;
1983 if (1 == pcontrol)
1984 memset(p + 4, 0, sizeof(sas_pcd_m_pg) - 4);
1985 return sizeof(sas_pcd_m_pg);
1986 }
1987
1988 static int resp_sas_sha_m_spg(unsigned char * p, int pcontrol)
1989 { /* SAS SSP shared protocol specific port mode subpage */
1990 unsigned char sas_sha_m_pg[] = {0x59, 0x2, 0, 0xc, 0, 0x6, 0x10, 0,
1991 0, 0, 0, 0, 0, 0, 0, 0,
1992 };
1993
1994 memcpy(p, sas_sha_m_pg, sizeof(sas_sha_m_pg));
1995 if (1 == pcontrol)
1996 memset(p + 4, 0, sizeof(sas_sha_m_pg) - 4);
1997 return sizeof(sas_sha_m_pg);
1998 }
1999
2000 #define SDEBUG_MAX_MSENSE_SZ 256
2001
2002 static int
2003 resp_mode_sense(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
2004 {
2005 unsigned char dbd, llbaa;
2006 int pcontrol, pcode, subpcode, bd_len;
2007 unsigned char dev_spec;
2008 int k, alloc_len, msense_6, offset, len, target_dev_id;
2009 int target = scp->device->id;
2010 unsigned char * ap;
2011 unsigned char arr[SDEBUG_MAX_MSENSE_SZ];
2012 unsigned char *cmd = scp->cmnd;
2013
2014 dbd = !!(cmd[1] & 0x8);
2015 pcontrol = (cmd[2] & 0xc0) >> 6;
2016 pcode = cmd[2] & 0x3f;
2017 subpcode = cmd[3];
2018 msense_6 = (MODE_SENSE == cmd[0]);
2019 llbaa = msense_6 ? 0 : !!(cmd[1] & 0x10);
2020 if ((0 == scsi_debug_ptype) && (0 == dbd))
2021 bd_len = llbaa ? 16 : 8;
2022 else
2023 bd_len = 0;
2024 alloc_len = msense_6 ? cmd[4] : ((cmd[7] << 8) | cmd[8]);
2025 memset(arr, 0, SDEBUG_MAX_MSENSE_SZ);
2026 if (0x3 == pcontrol) { /* Saving values not supported */
2027 mk_sense_buffer(scp, ILLEGAL_REQUEST, SAVING_PARAMS_UNSUP, 0);
2028 return check_condition_result;
2029 }
2030 target_dev_id = ((devip->sdbg_host->shost->host_no + 1) * 2000) +
2031 (devip->target * 1000) - 3;
2032 /* set DPOFUA bit for disks */
2033 if (0 == scsi_debug_ptype)
2034 dev_spec = (DEV_READONLY(target) ? 0x80 : 0x0) | 0x10;
2035 else
2036 dev_spec = 0x0;
2037 if (msense_6) {
2038 arr[2] = dev_spec;
2039 arr[3] = bd_len;
2040 offset = 4;
2041 } else {
2042 arr[3] = dev_spec;
2043 if (16 == bd_len)
2044 arr[4] = 0x1; /* set LONGLBA bit */
2045 arr[7] = bd_len; /* assume 255 or less */
2046 offset = 8;
2047 }
2048 ap = arr + offset;
2049 if ((bd_len > 0) && (!sdebug_capacity))
2050 sdebug_capacity = get_sdebug_capacity();
2051
2052 if (8 == bd_len) {
2053 if (sdebug_capacity > 0xfffffffe) {
2054 ap[0] = 0xff;
2055 ap[1] = 0xff;
2056 ap[2] = 0xff;
2057 ap[3] = 0xff;
2058 } else {
2059 ap[0] = (sdebug_capacity >> 24) & 0xff;
2060 ap[1] = (sdebug_capacity >> 16) & 0xff;
2061 ap[2] = (sdebug_capacity >> 8) & 0xff;
2062 ap[3] = sdebug_capacity & 0xff;
2063 }
2064 ap[6] = (scsi_debug_sector_size >> 8) & 0xff;
2065 ap[7] = scsi_debug_sector_size & 0xff;
2066 offset += bd_len;
2067 ap = arr + offset;
2068 } else if (16 == bd_len) {
2069 unsigned long long capac = sdebug_capacity;
2070
2071 for (k = 0; k < 8; ++k, capac >>= 8)
2072 ap[7 - k] = capac & 0xff;
2073 ap[12] = (scsi_debug_sector_size >> 24) & 0xff;
2074 ap[13] = (scsi_debug_sector_size >> 16) & 0xff;
2075 ap[14] = (scsi_debug_sector_size >> 8) & 0xff;
2076 ap[15] = scsi_debug_sector_size & 0xff;
2077 offset += bd_len;
2078 ap = arr + offset;
2079 }
2080
2081 if ((subpcode > 0x0) && (subpcode < 0xff) && (0x19 != pcode)) {
2082 /* TODO: Control Extension page */
2083 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1);
2084 return check_condition_result;
2085 }
2086 switch (pcode) {
2087 case 0x1: /* Read-Write error recovery page, direct access */
2088 len = resp_err_recov_pg(ap, pcontrol, target);
2089 offset += len;
2090 break;
2091 case 0x2: /* Disconnect-Reconnect page, all devices */
2092 len = resp_disconnect_pg(ap, pcontrol, target);
2093 offset += len;
2094 break;
2095 case 0x3: /* Format device page, direct access */
2096 len = resp_format_pg(ap, pcontrol, target);
2097 offset += len;
2098 break;
2099 case 0x8: /* Caching page, direct access */
2100 len = resp_caching_pg(ap, pcontrol, target);
2101 offset += len;
2102 break;
2103 case 0xa: /* Control Mode page, all devices */
2104 len = resp_ctrl_m_pg(ap, pcontrol, target);
2105 offset += len;
2106 break;
2107 case 0x19: /* if spc==1 then sas phy, control+discover */
2108 if ((subpcode > 0x2) && (subpcode < 0xff)) {
2109 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1);
2110 return check_condition_result;
2111 }
2112 len = 0;
2113 if ((0x0 == subpcode) || (0xff == subpcode))
2114 len += resp_sas_sf_m_pg(ap + len, pcontrol, target);
2115 if ((0x1 == subpcode) || (0xff == subpcode))
2116 len += resp_sas_pcd_m_spg(ap + len, pcontrol, target,
2117 target_dev_id);
2118 if ((0x2 == subpcode) || (0xff == subpcode))
2119 len += resp_sas_sha_m_spg(ap + len, pcontrol);
2120 offset += len;
2121 break;
2122 case 0x1c: /* Informational Exceptions Mode page, all devices */
2123 len = resp_iec_m_pg(ap, pcontrol, target);
2124 offset += len;
2125 break;
2126 case 0x3f: /* Read all Mode pages */
2127 if ((0 == subpcode) || (0xff == subpcode)) {
2128 len = resp_err_recov_pg(ap, pcontrol, target);
2129 len += resp_disconnect_pg(ap + len, pcontrol, target);
2130 len += resp_format_pg(ap + len, pcontrol, target);
2131 len += resp_caching_pg(ap + len, pcontrol, target);
2132 len += resp_ctrl_m_pg(ap + len, pcontrol, target);
2133 len += resp_sas_sf_m_pg(ap + len, pcontrol, target);
2134 if (0xff == subpcode) {
2135 len += resp_sas_pcd_m_spg(ap + len, pcontrol,
2136 target, target_dev_id);
2137 len += resp_sas_sha_m_spg(ap + len, pcontrol);
2138 }
2139 len += resp_iec_m_pg(ap + len, pcontrol, target);
2140 } else {
2141 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1);
2142 return check_condition_result;
2143 }
2144 offset += len;
2145 break;
2146 default:
2147 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 5);
2148 return check_condition_result;
2149 }
2150 if (msense_6)
2151 arr[0] = offset - 1;
2152 else {
2153 arr[0] = ((offset - 2) >> 8) & 0xff;
2154 arr[1] = (offset - 2) & 0xff;
2155 }
2156 return fill_from_dev_buffer(scp, arr, min(alloc_len, offset));
2157 }
2158
2159 #define SDEBUG_MAX_MSELECT_SZ 512
2160
2161 static int
2162 resp_mode_select(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
2163 {
2164 int pf, sp, ps, md_len, bd_len, off, spf, pg_len;
2165 int param_len, res, mpage;
2166 unsigned char arr[SDEBUG_MAX_MSELECT_SZ];
2167 unsigned char *cmd = scp->cmnd;
2168 int mselect6 = (MODE_SELECT == cmd[0]);
2169
2170 memset(arr, 0, sizeof(arr));
2171 pf = cmd[1] & 0x10;
2172 sp = cmd[1] & 0x1;
2173 param_len = mselect6 ? cmd[4] : ((cmd[7] << 8) + cmd[8]);
2174 if ((0 == pf) || sp || (param_len > SDEBUG_MAX_MSELECT_SZ)) {
2175 mk_sense_invalid_fld(scp, SDEB_IN_CDB, mselect6 ? 4 : 7, -1);
2176 return check_condition_result;
2177 }
2178 res = fetch_to_dev_buffer(scp, arr, param_len);
2179 if (-1 == res)
2180 return (DID_ERROR << 16);
2181 else if ((res < param_len) &&
2182 (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts))
2183 sdev_printk(KERN_INFO, scp->device,
2184 "%s: cdb indicated=%d, IO sent=%d bytes\n",
2185 __func__, param_len, res);
2186 md_len = mselect6 ? (arr[0] + 1) : ((arr[0] << 8) + arr[1] + 2);
2187 bd_len = mselect6 ? arr[3] : ((arr[6] << 8) + arr[7]);
2188 if (md_len > 2) {
2189 mk_sense_invalid_fld(scp, SDEB_IN_DATA, 0, -1);
2190 return check_condition_result;
2191 }
2192 off = bd_len + (mselect6 ? 4 : 8);
2193 mpage = arr[off] & 0x3f;
2194 ps = !!(arr[off] & 0x80);
2195 if (ps) {
2196 mk_sense_invalid_fld(scp, SDEB_IN_DATA, off, 7);
2197 return check_condition_result;
2198 }
2199 spf = !!(arr[off] & 0x40);
2200 pg_len = spf ? ((arr[off + 2] << 8) + arr[off + 3] + 4) :
2201 (arr[off + 1] + 2);
2202 if ((pg_len + off) > param_len) {
2203 mk_sense_buffer(scp, ILLEGAL_REQUEST,
2204 PARAMETER_LIST_LENGTH_ERR, 0);
2205 return check_condition_result;
2206 }
2207 switch (mpage) {
2208 case 0x8: /* Caching Mode page */
2209 if (caching_pg[1] == arr[off + 1]) {
2210 memcpy(caching_pg + 2, arr + off + 2,
2211 sizeof(caching_pg) - 2);
2212 goto set_mode_changed_ua;
2213 }
2214 break;
2215 case 0xa: /* Control Mode page */
2216 if (ctrl_m_pg[1] == arr[off + 1]) {
2217 memcpy(ctrl_m_pg + 2, arr + off + 2,
2218 sizeof(ctrl_m_pg) - 2);
2219 scsi_debug_dsense = !!(ctrl_m_pg[2] & 0x4);
2220 goto set_mode_changed_ua;
2221 }
2222 break;
2223 case 0x1c: /* Informational Exceptions Mode page */
2224 if (iec_m_pg[1] == arr[off + 1]) {
2225 memcpy(iec_m_pg + 2, arr + off + 2,
2226 sizeof(iec_m_pg) - 2);
2227 goto set_mode_changed_ua;
2228 }
2229 break;
2230 default:
2231 break;
2232 }
2233 mk_sense_invalid_fld(scp, SDEB_IN_DATA, off, 5);
2234 return check_condition_result;
2235 set_mode_changed_ua:
2236 set_bit(SDEBUG_UA_MODE_CHANGED, devip->uas_bm);
2237 return 0;
2238 }
2239
2240 static int resp_temp_l_pg(unsigned char * arr)
2241 {
2242 unsigned char temp_l_pg[] = {0x0, 0x0, 0x3, 0x2, 0x0, 38,
2243 0x0, 0x1, 0x3, 0x2, 0x0, 65,
2244 };
2245
2246 memcpy(arr, temp_l_pg, sizeof(temp_l_pg));
2247 return sizeof(temp_l_pg);
2248 }
2249
2250 static int resp_ie_l_pg(unsigned char * arr)
2251 {
2252 unsigned char ie_l_pg[] = {0x0, 0x0, 0x3, 0x3, 0x0, 0x0, 38,
2253 };
2254
2255 memcpy(arr, ie_l_pg, sizeof(ie_l_pg));
2256 if (iec_m_pg[2] & 0x4) { /* TEST bit set */
2257 arr[4] = THRESHOLD_EXCEEDED;
2258 arr[5] = 0xff;
2259 }
2260 return sizeof(ie_l_pg);
2261 }
2262
2263 #define SDEBUG_MAX_LSENSE_SZ 512
2264
2265 static int resp_log_sense(struct scsi_cmnd * scp,
2266 struct sdebug_dev_info * devip)
2267 {
2268 int ppc, sp, pcontrol, pcode, subpcode, alloc_len, len, n;
2269 unsigned char arr[SDEBUG_MAX_LSENSE_SZ];
2270 unsigned char *cmd = scp->cmnd;
2271
2272 memset(arr, 0, sizeof(arr));
2273 ppc = cmd[1] & 0x2;
2274 sp = cmd[1] & 0x1;
2275 if (ppc || sp) {
2276 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, ppc ? 1 : 0);
2277 return check_condition_result;
2278 }
2279 pcontrol = (cmd[2] & 0xc0) >> 6;
2280 pcode = cmd[2] & 0x3f;
2281 subpcode = cmd[3] & 0xff;
2282 alloc_len = (cmd[7] << 8) + cmd[8];
2283 arr[0] = pcode;
2284 if (0 == subpcode) {
2285 switch (pcode) {
2286 case 0x0: /* Supported log pages log page */
2287 n = 4;
2288 arr[n++] = 0x0; /* this page */
2289 arr[n++] = 0xd; /* Temperature */
2290 arr[n++] = 0x2f; /* Informational exceptions */
2291 arr[3] = n - 4;
2292 break;
2293 case 0xd: /* Temperature log page */
2294 arr[3] = resp_temp_l_pg(arr + 4);
2295 break;
2296 case 0x2f: /* Informational exceptions log page */
2297 arr[3] = resp_ie_l_pg(arr + 4);
2298 break;
2299 default:
2300 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 5);
2301 return check_condition_result;
2302 }
2303 } else if (0xff == subpcode) {
2304 arr[0] |= 0x40;
2305 arr[1] = subpcode;
2306 switch (pcode) {
2307 case 0x0: /* Supported log pages and subpages log page */
2308 n = 4;
2309 arr[n++] = 0x0;
2310 arr[n++] = 0x0; /* 0,0 page */
2311 arr[n++] = 0x0;
2312 arr[n++] = 0xff; /* this page */
2313 arr[n++] = 0xd;
2314 arr[n++] = 0x0; /* Temperature */
2315 arr[n++] = 0x2f;
2316 arr[n++] = 0x0; /* Informational exceptions */
2317 arr[3] = n - 4;
2318 break;
2319 case 0xd: /* Temperature subpages */
2320 n = 4;
2321 arr[n++] = 0xd;
2322 arr[n++] = 0x0; /* Temperature */
2323 arr[3] = n - 4;
2324 break;
2325 case 0x2f: /* Informational exceptions subpages */
2326 n = 4;
2327 arr[n++] = 0x2f;
2328 arr[n++] = 0x0; /* Informational exceptions */
2329 arr[3] = n - 4;
2330 break;
2331 default:
2332 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 5);
2333 return check_condition_result;
2334 }
2335 } else {
2336 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1);
2337 return check_condition_result;
2338 }
2339 len = min(((arr[2] << 8) + arr[3]) + 4, alloc_len);
2340 return fill_from_dev_buffer(scp, arr,
2341 min(len, SDEBUG_MAX_INQ_ARR_SZ));
2342 }
2343
2344 static int check_device_access_params(struct scsi_cmnd *scp,
2345 unsigned long long lba, unsigned int num)
2346 {
2347 if (lba + num > sdebug_capacity) {
2348 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
2349 return check_condition_result;
2350 }
2351 /* transfer length excessive (tie in to block limits VPD page) */
2352 if (num > sdebug_store_sectors) {
2353 /* needs work to find which cdb byte 'num' comes from */
2354 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
2355 return check_condition_result;
2356 }
2357 return 0;
2358 }
2359
2360 /* Returns number of bytes copied or -1 if error. */
2361 static int
2362 do_device_access(struct scsi_cmnd *scmd, u64 lba, u32 num, bool do_write)
2363 {
2364 int ret;
2365 u64 block, rest = 0;
2366 struct scsi_data_buffer *sdb;
2367 enum dma_data_direction dir;
2368
2369 if (do_write) {
2370 sdb = scsi_out(scmd);
2371 dir = DMA_TO_DEVICE;
2372 } else {
2373 sdb = scsi_in(scmd);
2374 dir = DMA_FROM_DEVICE;
2375 }
2376
2377 if (!sdb->length)
2378 return 0;
2379 if (!(scsi_bidi_cmnd(scmd) || scmd->sc_data_direction == dir))
2380 return -1;
2381
2382 block = do_div(lba, sdebug_store_sectors);
2383 if (block + num > sdebug_store_sectors)
2384 rest = block + num - sdebug_store_sectors;
2385
2386 ret = sg_copy_buffer(sdb->table.sgl, sdb->table.nents,
2387 fake_storep + (block * scsi_debug_sector_size),
2388 (num - rest) * scsi_debug_sector_size, 0, do_write);
2389 if (ret != (num - rest) * scsi_debug_sector_size)
2390 return ret;
2391
2392 if (rest) {
2393 ret += sg_copy_buffer(sdb->table.sgl, sdb->table.nents,
2394 fake_storep, rest * scsi_debug_sector_size,
2395 (num - rest) * scsi_debug_sector_size, do_write);
2396 }
2397
2398 return ret;
2399 }
2400
2401 /* If fake_store(lba,num) compares equal to arr(num), then copy top half of
2402 * arr into fake_store(lba,num) and return true. If comparison fails then
2403 * return false. */
2404 static bool
2405 comp_write_worker(u64 lba, u32 num, const u8 *arr)
2406 {
2407 bool res;
2408 u64 block, rest = 0;
2409 u32 store_blks = sdebug_store_sectors;
2410 u32 lb_size = scsi_debug_sector_size;
2411
2412 block = do_div(lba, store_blks);
2413 if (block + num > store_blks)
2414 rest = block + num - store_blks;
2415
2416 res = !memcmp(fake_storep + (block * lb_size), arr,
2417 (num - rest) * lb_size);
2418 if (!res)
2419 return res;
2420 if (rest)
2421 res = memcmp(fake_storep, arr + ((num - rest) * lb_size),
2422 rest * lb_size);
2423 if (!res)
2424 return res;
2425 arr += num * lb_size;
2426 memcpy(fake_storep + (block * lb_size), arr, (num - rest) * lb_size);
2427 if (rest)
2428 memcpy(fake_storep, arr + ((num - rest) * lb_size),
2429 rest * lb_size);
2430 return res;
2431 }
2432
2433 static __be16 dif_compute_csum(const void *buf, int len)
2434 {
2435 __be16 csum;
2436
2437 if (scsi_debug_guard)
2438 csum = (__force __be16)ip_compute_csum(buf, len);
2439 else
2440 csum = cpu_to_be16(crc_t10dif(buf, len));
2441
2442 return csum;
2443 }
2444
2445 static int dif_verify(struct sd_dif_tuple *sdt, const void *data,
2446 sector_t sector, u32 ei_lba)
2447 {
2448 __be16 csum = dif_compute_csum(data, scsi_debug_sector_size);
2449
2450 if (sdt->guard_tag != csum) {
2451 pr_err("GUARD check failed on sector %lu rcvd 0x%04x, data 0x%04x\n",
2452 (unsigned long)sector,
2453 be16_to_cpu(sdt->guard_tag),
2454 be16_to_cpu(csum));
2455 return 0x01;
2456 }
2457 if (scsi_debug_dif == SD_DIF_TYPE1_PROTECTION &&
2458 be32_to_cpu(sdt->ref_tag) != (sector & 0xffffffff)) {
2459 pr_err("REF check failed on sector %lu\n",
2460 (unsigned long)sector);
2461 return 0x03;
2462 }
2463 if (scsi_debug_dif == SD_DIF_TYPE2_PROTECTION &&
2464 be32_to_cpu(sdt->ref_tag) != ei_lba) {
2465 pr_err("REF check failed on sector %lu\n",
2466 (unsigned long)sector);
2467 return 0x03;
2468 }
2469 return 0;
2470 }
2471
2472 static void dif_copy_prot(struct scsi_cmnd *SCpnt, sector_t sector,
2473 unsigned int sectors, bool read)
2474 {
2475 size_t resid;
2476 void *paddr;
2477 const void *dif_store_end = dif_storep + sdebug_store_sectors;
2478 struct sg_mapping_iter miter;
2479
2480 /* Bytes of protection data to copy into sgl */
2481 resid = sectors * sizeof(*dif_storep);
2482
2483 sg_miter_start(&miter, scsi_prot_sglist(SCpnt),
2484 scsi_prot_sg_count(SCpnt), SG_MITER_ATOMIC |
2485 (read ? SG_MITER_TO_SG : SG_MITER_FROM_SG));
2486
2487 while (sg_miter_next(&miter) && resid > 0) {
2488 size_t len = min(miter.length, resid);
2489 void *start = dif_store(sector);
2490 size_t rest = 0;
2491
2492 if (dif_store_end < start + len)
2493 rest = start + len - dif_store_end;
2494
2495 paddr = miter.addr;
2496
2497 if (read)
2498 memcpy(paddr, start, len - rest);
2499 else
2500 memcpy(start, paddr, len - rest);
2501
2502 if (rest) {
2503 if (read)
2504 memcpy(paddr + len - rest, dif_storep, rest);
2505 else
2506 memcpy(dif_storep, paddr + len - rest, rest);
2507 }
2508
2509 sector += len / sizeof(*dif_storep);
2510 resid -= len;
2511 }
2512 sg_miter_stop(&miter);
2513 }
2514
2515 static int prot_verify_read(struct scsi_cmnd *SCpnt, sector_t start_sec,
2516 unsigned int sectors, u32 ei_lba)
2517 {
2518 unsigned int i;
2519 struct sd_dif_tuple *sdt;
2520 sector_t sector;
2521
2522 for (i = 0; i < sectors; i++, ei_lba++) {
2523 int ret;
2524
2525 sector = start_sec + i;
2526 sdt = dif_store(sector);
2527
2528 if (sdt->app_tag == cpu_to_be16(0xffff))
2529 continue;
2530
2531 ret = dif_verify(sdt, fake_store(sector), sector, ei_lba);
2532 if (ret) {
2533 dif_errors++;
2534 return ret;
2535 }
2536 }
2537
2538 dif_copy_prot(SCpnt, start_sec, sectors, true);
2539 dix_reads++;
2540
2541 return 0;
2542 }
2543
2544 static int
2545 resp_read_dt0(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
2546 {
2547 u8 *cmd = scp->cmnd;
2548 u64 lba;
2549 u32 num;
2550 u32 ei_lba;
2551 unsigned long iflags;
2552 int ret;
2553 bool check_prot;
2554
2555 switch (cmd[0]) {
2556 case READ_16:
2557 ei_lba = 0;
2558 lba = get_unaligned_be64(cmd + 2);
2559 num = get_unaligned_be32(cmd + 10);
2560 check_prot = true;
2561 break;
2562 case READ_10:
2563 ei_lba = 0;
2564 lba = get_unaligned_be32(cmd + 2);
2565 num = get_unaligned_be16(cmd + 7);
2566 check_prot = true;
2567 break;
2568 case READ_6:
2569 ei_lba = 0;
2570 lba = (u32)cmd[3] | (u32)cmd[2] << 8 |
2571 (u32)(cmd[1] & 0x1f) << 16;
2572 num = (0 == cmd[4]) ? 256 : cmd[4];
2573 check_prot = true;
2574 break;
2575 case READ_12:
2576 ei_lba = 0;
2577 lba = get_unaligned_be32(cmd + 2);
2578 num = get_unaligned_be32(cmd + 6);
2579 check_prot = true;
2580 break;
2581 case XDWRITEREAD_10:
2582 ei_lba = 0;
2583 lba = get_unaligned_be32(cmd + 2);
2584 num = get_unaligned_be16(cmd + 7);
2585 check_prot = false;
2586 break;
2587 default: /* assume READ(32) */
2588 lba = get_unaligned_be64(cmd + 12);
2589 ei_lba = get_unaligned_be32(cmd + 20);
2590 num = get_unaligned_be32(cmd + 28);
2591 check_prot = false;
2592 break;
2593 }
2594 if (check_prot) {
2595 if (scsi_debug_dif == SD_DIF_TYPE2_PROTECTION &&
2596 (cmd[1] & 0xe0)) {
2597 mk_sense_invalid_opcode(scp);
2598 return check_condition_result;
2599 }
2600 if ((scsi_debug_dif == SD_DIF_TYPE1_PROTECTION ||
2601 scsi_debug_dif == SD_DIF_TYPE3_PROTECTION) &&
2602 (cmd[1] & 0xe0) == 0)
2603 sdev_printk(KERN_ERR, scp->device, "Unprotected RD "
2604 "to DIF device\n");
2605 }
2606 if (sdebug_any_injecting_opt) {
2607 struct sdebug_scmd_extra_t *ep = scsi_cmd_priv(scp);
2608
2609 if (ep->inj_short)
2610 num /= 2;
2611 }
2612
2613 /* inline check_device_access_params() */
2614 if (lba + num > sdebug_capacity) {
2615 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
2616 return check_condition_result;
2617 }
2618 /* transfer length excessive (tie in to block limits VPD page) */
2619 if (num > sdebug_store_sectors) {
2620 /* needs work to find which cdb byte 'num' comes from */
2621 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
2622 return check_condition_result;
2623 }
2624
2625 if ((SCSI_DEBUG_OPT_MEDIUM_ERR & scsi_debug_opts) &&
2626 (lba <= (OPT_MEDIUM_ERR_ADDR + OPT_MEDIUM_ERR_NUM - 1)) &&
2627 ((lba + num) > OPT_MEDIUM_ERR_ADDR)) {
2628 /* claim unrecoverable read error */
2629 mk_sense_buffer(scp, MEDIUM_ERROR, UNRECOVERED_READ_ERR, 0);
2630 /* set info field and valid bit for fixed descriptor */
2631 if (0x70 == (scp->sense_buffer[0] & 0x7f)) {
2632 scp->sense_buffer[0] |= 0x80; /* Valid bit */
2633 ret = (lba < OPT_MEDIUM_ERR_ADDR)
2634 ? OPT_MEDIUM_ERR_ADDR : (int)lba;
2635 put_unaligned_be32(ret, scp->sense_buffer + 3);
2636 }
2637 scsi_set_resid(scp, scsi_bufflen(scp));
2638 return check_condition_result;
2639 }
2640
2641 read_lock_irqsave(&atomic_rw, iflags);
2642
2643 /* DIX + T10 DIF */
2644 if (scsi_debug_dix && scsi_prot_sg_count(scp)) {
2645 int prot_ret = prot_verify_read(scp, lba, num, ei_lba);
2646
2647 if (prot_ret) {
2648 read_unlock_irqrestore(&atomic_rw, iflags);
2649 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, prot_ret);
2650 return illegal_condition_result;
2651 }
2652 }
2653
2654 ret = do_device_access(scp, lba, num, false);
2655 read_unlock_irqrestore(&atomic_rw, iflags);
2656 if (ret == -1)
2657 return DID_ERROR << 16;
2658
2659 scsi_in(scp)->resid = scsi_bufflen(scp) - ret;
2660
2661 if (sdebug_any_injecting_opt) {
2662 struct sdebug_scmd_extra_t *ep = scsi_cmd_priv(scp);
2663
2664 if (ep->inj_recovered) {
2665 mk_sense_buffer(scp, RECOVERED_ERROR,
2666 THRESHOLD_EXCEEDED, 0);
2667 return check_condition_result;
2668 } else if (ep->inj_transport) {
2669 mk_sense_buffer(scp, ABORTED_COMMAND,
2670 TRANSPORT_PROBLEM, ACK_NAK_TO);
2671 return check_condition_result;
2672 } else if (ep->inj_dif) {
2673 /* Logical block guard check failed */
2674 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 1);
2675 return illegal_condition_result;
2676 } else if (ep->inj_dix) {
2677 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 1);
2678 return illegal_condition_result;
2679 }
2680 }
2681 return 0;
2682 }
2683
2684 static void dump_sector(unsigned char *buf, int len)
2685 {
2686 int i, j, n;
2687
2688 pr_err(">>> Sector Dump <<<\n");
2689 for (i = 0 ; i < len ; i += 16) {
2690 char b[128];
2691
2692 for (j = 0, n = 0; j < 16; j++) {
2693 unsigned char c = buf[i+j];
2694
2695 if (c >= 0x20 && c < 0x7e)
2696 n += scnprintf(b + n, sizeof(b) - n,
2697 " %c ", buf[i+j]);
2698 else
2699 n += scnprintf(b + n, sizeof(b) - n,
2700 "%02x ", buf[i+j]);
2701 }
2702 pr_err("%04d: %s\n", i, b);
2703 }
2704 }
2705
2706 static int prot_verify_write(struct scsi_cmnd *SCpnt, sector_t start_sec,
2707 unsigned int sectors, u32 ei_lba)
2708 {
2709 int ret;
2710 struct sd_dif_tuple *sdt;
2711 void *daddr;
2712 sector_t sector = start_sec;
2713 int ppage_offset;
2714 int dpage_offset;
2715 struct sg_mapping_iter diter;
2716 struct sg_mapping_iter piter;
2717
2718 BUG_ON(scsi_sg_count(SCpnt) == 0);
2719 BUG_ON(scsi_prot_sg_count(SCpnt) == 0);
2720
2721 sg_miter_start(&piter, scsi_prot_sglist(SCpnt),
2722 scsi_prot_sg_count(SCpnt),
2723 SG_MITER_ATOMIC | SG_MITER_FROM_SG);
2724 sg_miter_start(&diter, scsi_sglist(SCpnt), scsi_sg_count(SCpnt),
2725 SG_MITER_ATOMIC | SG_MITER_FROM_SG);
2726
2727 /* For each protection page */
2728 while (sg_miter_next(&piter)) {
2729 dpage_offset = 0;
2730 if (WARN_ON(!sg_miter_next(&diter))) {
2731 ret = 0x01;
2732 goto out;
2733 }
2734
2735 for (ppage_offset = 0; ppage_offset < piter.length;
2736 ppage_offset += sizeof(struct sd_dif_tuple)) {
2737 /* If we're at the end of the current
2738 * data page advance to the next one
2739 */
2740 if (dpage_offset >= diter.length) {
2741 if (WARN_ON(!sg_miter_next(&diter))) {
2742 ret = 0x01;
2743 goto out;
2744 }
2745 dpage_offset = 0;
2746 }
2747
2748 sdt = piter.addr + ppage_offset;
2749 daddr = diter.addr + dpage_offset;
2750
2751 ret = dif_verify(sdt, daddr, sector, ei_lba);
2752 if (ret) {
2753 dump_sector(daddr, scsi_debug_sector_size);
2754 goto out;
2755 }
2756
2757 sector++;
2758 ei_lba++;
2759 dpage_offset += scsi_debug_sector_size;
2760 }
2761 diter.consumed = dpage_offset;
2762 sg_miter_stop(&diter);
2763 }
2764 sg_miter_stop(&piter);
2765
2766 dif_copy_prot(SCpnt, start_sec, sectors, false);
2767 dix_writes++;
2768
2769 return 0;
2770
2771 out:
2772 dif_errors++;
2773 sg_miter_stop(&diter);
2774 sg_miter_stop(&piter);
2775 return ret;
2776 }
2777
2778 static unsigned long lba_to_map_index(sector_t lba)
2779 {
2780 if (scsi_debug_unmap_alignment) {
2781 lba += scsi_debug_unmap_granularity -
2782 scsi_debug_unmap_alignment;
2783 }
2784 sector_div(lba, scsi_debug_unmap_granularity);
2785
2786 return lba;
2787 }
2788
2789 static sector_t map_index_to_lba(unsigned long index)
2790 {
2791 sector_t lba = index * scsi_debug_unmap_granularity;
2792
2793 if (scsi_debug_unmap_alignment) {
2794 lba -= scsi_debug_unmap_granularity -
2795 scsi_debug_unmap_alignment;
2796 }
2797
2798 return lba;
2799 }
2800
2801 static unsigned int map_state(sector_t lba, unsigned int *num)
2802 {
2803 sector_t end;
2804 unsigned int mapped;
2805 unsigned long index;
2806 unsigned long next;
2807
2808 index = lba_to_map_index(lba);
2809 mapped = test_bit(index, map_storep);
2810
2811 if (mapped)
2812 next = find_next_zero_bit(map_storep, map_size, index);
2813 else
2814 next = find_next_bit(map_storep, map_size, index);
2815
2816 end = min_t(sector_t, sdebug_store_sectors, map_index_to_lba(next));
2817 *num = end - lba;
2818
2819 return mapped;
2820 }
2821
2822 static void map_region(sector_t lba, unsigned int len)
2823 {
2824 sector_t end = lba + len;
2825
2826 while (lba < end) {
2827 unsigned long index = lba_to_map_index(lba);
2828
2829 if (index < map_size)
2830 set_bit(index, map_storep);
2831
2832 lba = map_index_to_lba(index + 1);
2833 }
2834 }
2835
2836 static void unmap_region(sector_t lba, unsigned int len)
2837 {
2838 sector_t end = lba + len;
2839
2840 while (lba < end) {
2841 unsigned long index = lba_to_map_index(lba);
2842
2843 if (lba == map_index_to_lba(index) &&
2844 lba + scsi_debug_unmap_granularity <= end &&
2845 index < map_size) {
2846 clear_bit(index, map_storep);
2847 if (scsi_debug_lbprz) {
2848 memset(fake_storep +
2849 lba * scsi_debug_sector_size, 0,
2850 scsi_debug_sector_size *
2851 scsi_debug_unmap_granularity);
2852 }
2853 if (dif_storep) {
2854 memset(dif_storep + lba, 0xff,
2855 sizeof(*dif_storep) *
2856 scsi_debug_unmap_granularity);
2857 }
2858 }
2859 lba = map_index_to_lba(index + 1);
2860 }
2861 }
2862
2863 static int
2864 resp_write_dt0(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
2865 {
2866 u8 *cmd = scp->cmnd;
2867 u64 lba;
2868 u32 num;
2869 u32 ei_lba;
2870 unsigned long iflags;
2871 int ret;
2872 bool check_prot;
2873
2874 switch (cmd[0]) {
2875 case WRITE_16:
2876 ei_lba = 0;
2877 lba = get_unaligned_be64(cmd + 2);
2878 num = get_unaligned_be32(cmd + 10);
2879 check_prot = true;
2880 break;
2881 case WRITE_10:
2882 ei_lba = 0;
2883 lba = get_unaligned_be32(cmd + 2);
2884 num = get_unaligned_be16(cmd + 7);
2885 check_prot = true;
2886 break;
2887 case WRITE_6:
2888 ei_lba = 0;
2889 lba = (u32)cmd[3] | (u32)cmd[2] << 8 |
2890 (u32)(cmd[1] & 0x1f) << 16;
2891 num = (0 == cmd[4]) ? 256 : cmd[4];
2892 check_prot = true;
2893 break;
2894 case WRITE_12:
2895 ei_lba = 0;
2896 lba = get_unaligned_be32(cmd + 2);
2897 num = get_unaligned_be32(cmd + 6);
2898 check_prot = true;
2899 break;
2900 case 0x53: /* XDWRITEREAD(10) */
2901 ei_lba = 0;
2902 lba = get_unaligned_be32(cmd + 2);
2903 num = get_unaligned_be16(cmd + 7);
2904 check_prot = false;
2905 break;
2906 default: /* assume WRITE(32) */
2907 lba = get_unaligned_be64(cmd + 12);
2908 ei_lba = get_unaligned_be32(cmd + 20);
2909 num = get_unaligned_be32(cmd + 28);
2910 check_prot = false;
2911 break;
2912 }
2913 if (check_prot) {
2914 if (scsi_debug_dif == SD_DIF_TYPE2_PROTECTION &&
2915 (cmd[1] & 0xe0)) {
2916 mk_sense_invalid_opcode(scp);
2917 return check_condition_result;
2918 }
2919 if ((scsi_debug_dif == SD_DIF_TYPE1_PROTECTION ||
2920 scsi_debug_dif == SD_DIF_TYPE3_PROTECTION) &&
2921 (cmd[1] & 0xe0) == 0)
2922 sdev_printk(KERN_ERR, scp->device, "Unprotected WR "
2923 "to DIF device\n");
2924 }
2925
2926 /* inline check_device_access_params() */
2927 if (lba + num > sdebug_capacity) {
2928 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
2929 return check_condition_result;
2930 }
2931 /* transfer length excessive (tie in to block limits VPD page) */
2932 if (num > sdebug_store_sectors) {
2933 /* needs work to find which cdb byte 'num' comes from */
2934 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
2935 return check_condition_result;
2936 }
2937
2938 write_lock_irqsave(&atomic_rw, iflags);
2939
2940 /* DIX + T10 DIF */
2941 if (scsi_debug_dix && scsi_prot_sg_count(scp)) {
2942 int prot_ret = prot_verify_write(scp, lba, num, ei_lba);
2943
2944 if (prot_ret) {
2945 write_unlock_irqrestore(&atomic_rw, iflags);
2946 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, prot_ret);
2947 return illegal_condition_result;
2948 }
2949 }
2950
2951 ret = do_device_access(scp, lba, num, true);
2952 if (scsi_debug_lbp())
2953 map_region(lba, num);
2954 write_unlock_irqrestore(&atomic_rw, iflags);
2955 if (-1 == ret)
2956 return (DID_ERROR << 16);
2957 else if ((ret < (num * scsi_debug_sector_size)) &&
2958 (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts))
2959 sdev_printk(KERN_INFO, scp->device,
2960 "%s: write: cdb indicated=%u, IO sent=%d bytes\n",
2961 my_name, num * scsi_debug_sector_size, ret);
2962
2963 if (sdebug_any_injecting_opt) {
2964 struct sdebug_scmd_extra_t *ep = scsi_cmd_priv(scp);
2965
2966 if (ep->inj_recovered) {
2967 mk_sense_buffer(scp, RECOVERED_ERROR,
2968 THRESHOLD_EXCEEDED, 0);
2969 return check_condition_result;
2970 } else if (ep->inj_dif) {
2971 /* Logical block guard check failed */
2972 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 1);
2973 return illegal_condition_result;
2974 } else if (ep->inj_dix) {
2975 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 1);
2976 return illegal_condition_result;
2977 }
2978 }
2979 return 0;
2980 }
2981
2982 static int
2983 resp_write_same(struct scsi_cmnd *scp, u64 lba, u32 num, u32 ei_lba,
2984 bool unmap, bool ndob)
2985 {
2986 unsigned long iflags;
2987 unsigned long long i;
2988 int ret;
2989
2990 ret = check_device_access_params(scp, lba, num);
2991 if (ret)
2992 return ret;
2993
2994 write_lock_irqsave(&atomic_rw, iflags);
2995
2996 if (unmap && scsi_debug_lbp()) {
2997 unmap_region(lba, num);
2998 goto out;
2999 }
3000
3001 /* if ndob then zero 1 logical block, else fetch 1 logical block */
3002 if (ndob) {
3003 memset(fake_storep + (lba * scsi_debug_sector_size), 0,
3004 scsi_debug_sector_size);
3005 ret = 0;
3006 } else
3007 ret = fetch_to_dev_buffer(scp, fake_storep +
3008 (lba * scsi_debug_sector_size),
3009 scsi_debug_sector_size);
3010
3011 if (-1 == ret) {
3012 write_unlock_irqrestore(&atomic_rw, iflags);
3013 return (DID_ERROR << 16);
3014 } else if ((ret < (num * scsi_debug_sector_size)) &&
3015 (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts))
3016 sdev_printk(KERN_INFO, scp->device,
3017 "%s: %s: cdb indicated=%u, IO sent=%d bytes\n",
3018 my_name, "write same",
3019 num * scsi_debug_sector_size, ret);
3020
3021 /* Copy first sector to remaining blocks */
3022 for (i = 1 ; i < num ; i++)
3023 memcpy(fake_storep + ((lba + i) * scsi_debug_sector_size),
3024 fake_storep + (lba * scsi_debug_sector_size),
3025 scsi_debug_sector_size);
3026
3027 if (scsi_debug_lbp())
3028 map_region(lba, num);
3029 out:
3030 write_unlock_irqrestore(&atomic_rw, iflags);
3031
3032 return 0;
3033 }
3034
3035 static int
3036 resp_write_same_10(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
3037 {
3038 u8 *cmd = scp->cmnd;
3039 u32 lba;
3040 u16 num;
3041 u32 ei_lba = 0;
3042 bool unmap = false;
3043
3044 if (cmd[1] & 0x8) {
3045 if (scsi_debug_lbpws10 == 0) {
3046 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 3);
3047 return check_condition_result;
3048 } else
3049 unmap = true;
3050 }
3051 lba = get_unaligned_be32(cmd + 2);
3052 num = get_unaligned_be16(cmd + 7);
3053 if (num > scsi_debug_write_same_length) {
3054 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 7, -1);
3055 return check_condition_result;
3056 }
3057 return resp_write_same(scp, lba, num, ei_lba, unmap, false);
3058 }
3059
3060 static int
3061 resp_write_same_16(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
3062 {
3063 u8 *cmd = scp->cmnd;
3064 u64 lba;
3065 u32 num;
3066 u32 ei_lba = 0;
3067 bool unmap = false;
3068 bool ndob = false;
3069
3070 if (cmd[1] & 0x8) { /* UNMAP */
3071 if (scsi_debug_lbpws == 0) {
3072 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 3);
3073 return check_condition_result;
3074 } else
3075 unmap = true;
3076 }
3077 if (cmd[1] & 0x1) /* NDOB (no data-out buffer, assumes zeroes) */
3078 ndob = true;
3079 lba = get_unaligned_be64(cmd + 2);
3080 num = get_unaligned_be32(cmd + 10);
3081 if (num > scsi_debug_write_same_length) {
3082 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 10, -1);
3083 return check_condition_result;
3084 }
3085 return resp_write_same(scp, lba, num, ei_lba, unmap, ndob);
3086 }
3087
3088 /* Note the mode field is in the same position as the (lower) service action
3089 * field. For the Report supported operation codes command, SPC-4 suggests
3090 * each mode of this command should be reported separately; for future. */
3091 static int
3092 resp_write_buffer(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
3093 {
3094 u8 *cmd = scp->cmnd;
3095 struct scsi_device *sdp = scp->device;
3096 struct sdebug_dev_info *dp;
3097 u8 mode;
3098
3099 mode = cmd[1] & 0x1f;
3100 switch (mode) {
3101 case 0x4: /* download microcode (MC) and activate (ACT) */
3102 /* set UAs on this device only */
3103 set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm);
3104 set_bit(SDEBUG_UA_MICROCODE_CHANGED, devip->uas_bm);
3105 break;
3106 case 0x5: /* download MC, save and ACT */
3107 set_bit(SDEBUG_UA_MICROCODE_CHANGED_WO_RESET, devip->uas_bm);
3108 break;
3109 case 0x6: /* download MC with offsets and ACT */
3110 /* set UAs on most devices (LUs) in this target */
3111 list_for_each_entry(dp,
3112 &devip->sdbg_host->dev_info_list,
3113 dev_list)
3114 if (dp->target == sdp->id) {
3115 set_bit(SDEBUG_UA_BUS_RESET, dp->uas_bm);
3116 if (devip != dp)
3117 set_bit(SDEBUG_UA_MICROCODE_CHANGED,
3118 dp->uas_bm);
3119 }
3120 break;
3121 case 0x7: /* download MC with offsets, save, and ACT */
3122 /* set UA on all devices (LUs) in this target */
3123 list_for_each_entry(dp,
3124 &devip->sdbg_host->dev_info_list,
3125 dev_list)
3126 if (dp->target == sdp->id)
3127 set_bit(SDEBUG_UA_MICROCODE_CHANGED_WO_RESET,
3128 dp->uas_bm);
3129 break;
3130 default:
3131 /* do nothing for this command for other mode values */
3132 break;
3133 }
3134 return 0;
3135 }
3136
3137 static int
3138 resp_comp_write(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
3139 {
3140 u8 *cmd = scp->cmnd;
3141 u8 *arr;
3142 u8 *fake_storep_hold;
3143 u64 lba;
3144 u32 dnum;
3145 u32 lb_size = scsi_debug_sector_size;
3146 u8 num;
3147 unsigned long iflags;
3148 int ret;
3149 int retval = 0;
3150
3151 lba = get_unaligned_be64(cmd + 2);
3152 num = cmd[13]; /* 1 to a maximum of 255 logical blocks */
3153 if (0 == num)
3154 return 0; /* degenerate case, not an error */
3155 if (scsi_debug_dif == SD_DIF_TYPE2_PROTECTION &&
3156 (cmd[1] & 0xe0)) {
3157 mk_sense_invalid_opcode(scp);
3158 return check_condition_result;
3159 }
3160 if ((scsi_debug_dif == SD_DIF_TYPE1_PROTECTION ||
3161 scsi_debug_dif == SD_DIF_TYPE3_PROTECTION) &&
3162 (cmd[1] & 0xe0) == 0)
3163 sdev_printk(KERN_ERR, scp->device, "Unprotected WR "
3164 "to DIF device\n");
3165
3166 /* inline check_device_access_params() */
3167 if (lba + num > sdebug_capacity) {
3168 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
3169 return check_condition_result;
3170 }
3171 /* transfer length excessive (tie in to block limits VPD page) */
3172 if (num > sdebug_store_sectors) {
3173 /* needs work to find which cdb byte 'num' comes from */
3174 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
3175 return check_condition_result;
3176 }
3177 dnum = 2 * num;
3178 arr = kzalloc(dnum * lb_size, GFP_ATOMIC);
3179 if (NULL == arr) {
3180 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
3181 INSUFF_RES_ASCQ);
3182 return check_condition_result;
3183 }
3184
3185 write_lock_irqsave(&atomic_rw, iflags);
3186
3187 /* trick do_device_access() to fetch both compare and write buffers
3188 * from data-in into arr. Safe (atomic) since write_lock held. */
3189 fake_storep_hold = fake_storep;
3190 fake_storep = arr;
3191 ret = do_device_access(scp, 0, dnum, true);
3192 fake_storep = fake_storep_hold;
3193 if (ret == -1) {
3194 retval = DID_ERROR << 16;
3195 goto cleanup;
3196 } else if ((ret < (dnum * lb_size)) &&
3197 (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts))
3198 sdev_printk(KERN_INFO, scp->device, "%s: compare_write: cdb "
3199 "indicated=%u, IO sent=%d bytes\n", my_name,
3200 dnum * lb_size, ret);
3201 if (!comp_write_worker(lba, num, arr)) {
3202 mk_sense_buffer(scp, MISCOMPARE, MISCOMPARE_VERIFY_ASC, 0);
3203 retval = check_condition_result;
3204 goto cleanup;
3205 }
3206 if (scsi_debug_lbp())
3207 map_region(lba, num);
3208 cleanup:
3209 write_unlock_irqrestore(&atomic_rw, iflags);
3210 kfree(arr);
3211 return retval;
3212 }
3213
3214 struct unmap_block_desc {
3215 __be64 lba;
3216 __be32 blocks;
3217 __be32 __reserved;
3218 };
3219
3220 static int
3221 resp_unmap(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
3222 {
3223 unsigned char *buf;
3224 struct unmap_block_desc *desc;
3225 unsigned int i, payload_len, descriptors;
3226 int ret;
3227 unsigned long iflags;
3228
3229
3230 if (!scsi_debug_lbp())
3231 return 0; /* fib and say its done */
3232 payload_len = get_unaligned_be16(scp->cmnd + 7);
3233 BUG_ON(scsi_bufflen(scp) != payload_len);
3234
3235 descriptors = (payload_len - 8) / 16;
3236 if (descriptors > scsi_debug_unmap_max_desc) {
3237 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 7, -1);
3238 return check_condition_result;
3239 }
3240
3241 buf = kmalloc(scsi_bufflen(scp), GFP_ATOMIC);
3242 if (!buf) {
3243 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
3244 INSUFF_RES_ASCQ);
3245 return check_condition_result;
3246 }
3247
3248 scsi_sg_copy_to_buffer(scp, buf, scsi_bufflen(scp));
3249
3250 BUG_ON(get_unaligned_be16(&buf[0]) != payload_len - 2);
3251 BUG_ON(get_unaligned_be16(&buf[2]) != descriptors * 16);
3252
3253 desc = (void *)&buf[8];
3254
3255 write_lock_irqsave(&atomic_rw, iflags);
3256
3257 for (i = 0 ; i < descriptors ; i++) {
3258 unsigned long long lba = get_unaligned_be64(&desc[i].lba);
3259 unsigned int num = get_unaligned_be32(&desc[i].blocks);
3260
3261 ret = check_device_access_params(scp, lba, num);
3262 if (ret)
3263 goto out;
3264
3265 unmap_region(lba, num);
3266 }
3267
3268 ret = 0;
3269
3270 out:
3271 write_unlock_irqrestore(&atomic_rw, iflags);
3272 kfree(buf);
3273
3274 return ret;
3275 }
3276
3277 #define SDEBUG_GET_LBA_STATUS_LEN 32
3278
3279 static int
3280 resp_get_lba_status(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
3281 {
3282 u8 *cmd = scp->cmnd;
3283 u64 lba;
3284 u32 alloc_len, mapped, num;
3285 u8 arr[SDEBUG_GET_LBA_STATUS_LEN];
3286 int ret;
3287
3288 lba = get_unaligned_be64(cmd + 2);
3289 alloc_len = get_unaligned_be32(cmd + 10);
3290
3291 if (alloc_len < 24)
3292 return 0;
3293
3294 ret = check_device_access_params(scp, lba, 1);
3295 if (ret)
3296 return ret;
3297
3298 if (scsi_debug_lbp())
3299 mapped = map_state(lba, &num);
3300 else {
3301 mapped = 1;
3302 /* following just in case virtual_gb changed */
3303 sdebug_capacity = get_sdebug_capacity();
3304 if (sdebug_capacity - lba <= 0xffffffff)
3305 num = sdebug_capacity - lba;
3306 else
3307 num = 0xffffffff;
3308 }
3309
3310 memset(arr, 0, SDEBUG_GET_LBA_STATUS_LEN);
3311 put_unaligned_be32(20, arr); /* Parameter Data Length */
3312 put_unaligned_be64(lba, arr + 8); /* LBA */
3313 put_unaligned_be32(num, arr + 16); /* Number of blocks */
3314 arr[20] = !mapped; /* prov_stat=0: mapped; 1: dealloc */
3315
3316 return fill_from_dev_buffer(scp, arr, SDEBUG_GET_LBA_STATUS_LEN);
3317 }
3318
3319 #define SDEBUG_RLUN_ARR_SZ 256
3320
3321 static int resp_report_luns(struct scsi_cmnd * scp,
3322 struct sdebug_dev_info * devip)
3323 {
3324 unsigned int alloc_len;
3325 int lun_cnt, i, upper, num, n, want_wlun, shortish;
3326 u64 lun;
3327 unsigned char *cmd = scp->cmnd;
3328 int select_report = (int)cmd[2];
3329 struct scsi_lun *one_lun;
3330 unsigned char arr[SDEBUG_RLUN_ARR_SZ];
3331 unsigned char * max_addr;
3332
3333 clear_luns_changed_on_target(devip);
3334 alloc_len = cmd[9] + (cmd[8] << 8) + (cmd[7] << 16) + (cmd[6] << 24);
3335 shortish = (alloc_len < 4);
3336 if (shortish || (select_report > 2)) {
3337 mk_sense_invalid_fld(scp, SDEB_IN_CDB, shortish ? 6 : 2, -1);
3338 return check_condition_result;
3339 }
3340 /* can produce response with up to 16k luns (lun 0 to lun 16383) */
3341 memset(arr, 0, SDEBUG_RLUN_ARR_SZ);
3342 lun_cnt = scsi_debug_max_luns;
3343 if (1 == select_report)
3344 lun_cnt = 0;
3345 else if (scsi_debug_no_lun_0 && (lun_cnt > 0))
3346 --lun_cnt;
3347 want_wlun = (select_report > 0) ? 1 : 0;
3348 num = lun_cnt + want_wlun;
3349 arr[2] = ((sizeof(struct scsi_lun) * num) >> 8) & 0xff;
3350 arr[3] = (sizeof(struct scsi_lun) * num) & 0xff;
3351 n = min((int)((SDEBUG_RLUN_ARR_SZ - 8) /
3352 sizeof(struct scsi_lun)), num);
3353 if (n < num) {
3354 want_wlun = 0;
3355 lun_cnt = n;
3356 }
3357 one_lun = (struct scsi_lun *) &arr[8];
3358 max_addr = arr + SDEBUG_RLUN_ARR_SZ;
3359 for (i = 0, lun = (scsi_debug_no_lun_0 ? 1 : 0);
3360 ((i < lun_cnt) && ((unsigned char *)(one_lun + i) < max_addr));
3361 i++, lun++) {
3362 upper = (lun >> 8) & 0x3f;
3363 if (upper)
3364 one_lun[i].scsi_lun[0] =
3365 (upper | (SAM2_LUN_ADDRESS_METHOD << 6));
3366 one_lun[i].scsi_lun[1] = lun & 0xff;
3367 }
3368 if (want_wlun) {
3369 one_lun[i].scsi_lun[0] = (SCSI_W_LUN_REPORT_LUNS >> 8) & 0xff;
3370 one_lun[i].scsi_lun[1] = SCSI_W_LUN_REPORT_LUNS & 0xff;
3371 i++;
3372 }
3373 alloc_len = (unsigned char *)(one_lun + i) - arr;
3374 return fill_from_dev_buffer(scp, arr,
3375 min((int)alloc_len, SDEBUG_RLUN_ARR_SZ));
3376 }
3377
3378 static int resp_xdwriteread(struct scsi_cmnd *scp, unsigned long long lba,
3379 unsigned int num, struct sdebug_dev_info *devip)
3380 {
3381 int j;
3382 unsigned char *kaddr, *buf;
3383 unsigned int offset;
3384 struct scsi_data_buffer *sdb = scsi_in(scp);
3385 struct sg_mapping_iter miter;
3386
3387 /* better not to use temporary buffer. */
3388 buf = kmalloc(scsi_bufflen(scp), GFP_ATOMIC);
3389 if (!buf) {
3390 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
3391 INSUFF_RES_ASCQ);
3392 return check_condition_result;
3393 }
3394
3395 scsi_sg_copy_to_buffer(scp, buf, scsi_bufflen(scp));
3396
3397 offset = 0;
3398 sg_miter_start(&miter, sdb->table.sgl, sdb->table.nents,
3399 SG_MITER_ATOMIC | SG_MITER_TO_SG);
3400
3401 while (sg_miter_next(&miter)) {
3402 kaddr = miter.addr;
3403 for (j = 0; j < miter.length; j++)
3404 *(kaddr + j) ^= *(buf + offset + j);
3405
3406 offset += miter.length;
3407 }
3408 sg_miter_stop(&miter);
3409 kfree(buf);
3410
3411 return 0;
3412 }
3413
3414 static int
3415 resp_xdwriteread_10(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
3416 {
3417 u8 *cmd = scp->cmnd;
3418 u64 lba;
3419 u32 num;
3420 int errsts;
3421
3422 if (!scsi_bidi_cmnd(scp)) {
3423 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
3424 INSUFF_RES_ASCQ);
3425 return check_condition_result;
3426 }
3427 errsts = resp_read_dt0(scp, devip);
3428 if (errsts)
3429 return errsts;
3430 if (!(cmd[1] & 0x4)) { /* DISABLE_WRITE is not set */
3431 errsts = resp_write_dt0(scp, devip);
3432 if (errsts)
3433 return errsts;
3434 }
3435 lba = get_unaligned_be32(cmd + 2);
3436 num = get_unaligned_be16(cmd + 7);
3437 return resp_xdwriteread(scp, lba, num, devip);
3438 }
3439
3440 /* When timer or tasklet goes off this function is called. */
3441 static void sdebug_q_cmd_complete(unsigned long indx)
3442 {
3443 int qa_indx;
3444 int retiring = 0;
3445 unsigned long iflags;
3446 struct sdebug_queued_cmd *sqcp;
3447 struct scsi_cmnd *scp;
3448 struct sdebug_dev_info *devip;
3449
3450 atomic_inc(&sdebug_completions);
3451 qa_indx = indx;
3452 if ((qa_indx < 0) || (qa_indx >= SCSI_DEBUG_CANQUEUE)) {
3453 pr_err("wild qa_indx=%d\n", qa_indx);
3454 return;
3455 }
3456 spin_lock_irqsave(&queued_arr_lock, iflags);
3457 sqcp = &queued_arr[qa_indx];
3458 scp = sqcp->a_cmnd;
3459 if (NULL == scp) {
3460 spin_unlock_irqrestore(&queued_arr_lock, iflags);
3461 pr_err("scp is NULL\n");
3462 return;
3463 }
3464 devip = (struct sdebug_dev_info *)scp->device->hostdata;
3465 if (devip)
3466 atomic_dec(&devip->num_in_q);
3467 else
3468 pr_err("devip=NULL\n");
3469 if (atomic_read(&retired_max_queue) > 0)
3470 retiring = 1;
3471
3472 sqcp->a_cmnd = NULL;
3473 if (!test_and_clear_bit(qa_indx, queued_in_use_bm)) {
3474 spin_unlock_irqrestore(&queued_arr_lock, iflags);
3475 pr_err("Unexpected completion\n");
3476 return;
3477 }
3478
3479 if (unlikely(retiring)) { /* user has reduced max_queue */
3480 int k, retval;
3481
3482 retval = atomic_read(&retired_max_queue);
3483 if (qa_indx >= retval) {
3484 spin_unlock_irqrestore(&queued_arr_lock, iflags);
3485 pr_err("index %d too large\n", retval);
3486 return;
3487 }
3488 k = find_last_bit(queued_in_use_bm, retval);
3489 if ((k < scsi_debug_max_queue) || (k == retval))
3490 atomic_set(&retired_max_queue, 0);
3491 else
3492 atomic_set(&retired_max_queue, k + 1);
3493 }
3494 spin_unlock_irqrestore(&queued_arr_lock, iflags);
3495 scp->scsi_done(scp); /* callback to mid level */
3496 }
3497
3498 /* When high resolution timer goes off this function is called. */
3499 static enum hrtimer_restart
3500 sdebug_q_cmd_hrt_complete(struct hrtimer *timer)
3501 {
3502 int qa_indx;
3503 int retiring = 0;
3504 unsigned long iflags;
3505 struct sdebug_hrtimer *sd_hrtp = (struct sdebug_hrtimer *)timer;
3506 struct sdebug_queued_cmd *sqcp;
3507 struct scsi_cmnd *scp;
3508 struct sdebug_dev_info *devip;
3509
3510 atomic_inc(&sdebug_completions);
3511 qa_indx = sd_hrtp->qa_indx;
3512 if ((qa_indx < 0) || (qa_indx >= SCSI_DEBUG_CANQUEUE)) {
3513 pr_err("wild qa_indx=%d\n", qa_indx);
3514 goto the_end;
3515 }
3516 spin_lock_irqsave(&queued_arr_lock, iflags);
3517 sqcp = &queued_arr[qa_indx];
3518 scp = sqcp->a_cmnd;
3519 if (NULL == scp) {
3520 spin_unlock_irqrestore(&queued_arr_lock, iflags);
3521 pr_err("scp is NULL\n");
3522 goto the_end;
3523 }
3524 devip = (struct sdebug_dev_info *)scp->device->hostdata;
3525 if (devip)
3526 atomic_dec(&devip->num_in_q);
3527 else
3528 pr_err("devip=NULL\n");
3529 if (atomic_read(&retired_max_queue) > 0)
3530 retiring = 1;
3531
3532 sqcp->a_cmnd = NULL;
3533 if (!test_and_clear_bit(qa_indx, queued_in_use_bm)) {
3534 spin_unlock_irqrestore(&queued_arr_lock, iflags);
3535 pr_err("Unexpected completion\n");
3536 goto the_end;
3537 }
3538
3539 if (unlikely(retiring)) { /* user has reduced max_queue */
3540 int k, retval;
3541
3542 retval = atomic_read(&retired_max_queue);
3543 if (qa_indx >= retval) {
3544 spin_unlock_irqrestore(&queued_arr_lock, iflags);
3545 pr_err("index %d too large\n", retval);
3546 goto the_end;
3547 }
3548 k = find_last_bit(queued_in_use_bm, retval);
3549 if ((k < scsi_debug_max_queue) || (k == retval))
3550 atomic_set(&retired_max_queue, 0);
3551 else
3552 atomic_set(&retired_max_queue, k + 1);
3553 }
3554 spin_unlock_irqrestore(&queued_arr_lock, iflags);
3555 scp->scsi_done(scp); /* callback to mid level */
3556 the_end:
3557 return HRTIMER_NORESTART;
3558 }
3559
3560 static struct sdebug_dev_info *
3561 sdebug_device_create(struct sdebug_host_info *sdbg_host, gfp_t flags)
3562 {
3563 struct sdebug_dev_info *devip;
3564
3565 devip = kzalloc(sizeof(*devip), flags);
3566 if (devip) {
3567 devip->sdbg_host = sdbg_host;
3568 list_add_tail(&devip->dev_list, &sdbg_host->dev_info_list);
3569 }
3570 return devip;
3571 }
3572
3573 static struct sdebug_dev_info * devInfoReg(struct scsi_device * sdev)
3574 {
3575 struct sdebug_host_info * sdbg_host;
3576 struct sdebug_dev_info * open_devip = NULL;
3577 struct sdebug_dev_info * devip =
3578 (struct sdebug_dev_info *)sdev->hostdata;
3579
3580 if (devip)
3581 return devip;
3582 sdbg_host = *(struct sdebug_host_info **)shost_priv(sdev->host);
3583 if (!sdbg_host) {
3584 pr_err("Host info NULL\n");
3585 return NULL;
3586 }
3587 list_for_each_entry(devip, &sdbg_host->dev_info_list, dev_list) {
3588 if ((devip->used) && (devip->channel == sdev->channel) &&
3589 (devip->target == sdev->id) &&
3590 (devip->lun == sdev->lun))
3591 return devip;
3592 else {
3593 if ((!devip->used) && (!open_devip))
3594 open_devip = devip;
3595 }
3596 }
3597 if (!open_devip) { /* try and make a new one */
3598 open_devip = sdebug_device_create(sdbg_host, GFP_ATOMIC);
3599 if (!open_devip) {
3600 pr_err("out of memory at line %d\n", __LINE__);
3601 return NULL;
3602 }
3603 }
3604
3605 open_devip->channel = sdev->channel;
3606 open_devip->target = sdev->id;
3607 open_devip->lun = sdev->lun;
3608 open_devip->sdbg_host = sdbg_host;
3609 atomic_set(&open_devip->num_in_q, 0);
3610 set_bit(SDEBUG_UA_POR, open_devip->uas_bm);
3611 open_devip->used = true;
3612 return open_devip;
3613 }
3614
3615 static int scsi_debug_slave_alloc(struct scsi_device *sdp)
3616 {
3617 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
3618 pr_info("slave_alloc <%u %u %u %llu>\n",
3619 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
3620 queue_flag_set_unlocked(QUEUE_FLAG_BIDI, sdp->request_queue);
3621 return 0;
3622 }
3623
3624 static int scsi_debug_slave_configure(struct scsi_device *sdp)
3625 {
3626 struct sdebug_dev_info *devip;
3627
3628 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
3629 pr_info("slave_configure <%u %u %u %llu>\n",
3630 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
3631 if (sdp->host->max_cmd_len != SCSI_DEBUG_MAX_CMD_LEN)
3632 sdp->host->max_cmd_len = SCSI_DEBUG_MAX_CMD_LEN;
3633 devip = devInfoReg(sdp);
3634 if (NULL == devip)
3635 return 1; /* no resources, will be marked offline */
3636 sdp->hostdata = devip;
3637 blk_queue_max_segment_size(sdp->request_queue, -1U);
3638 if (scsi_debug_no_uld)
3639 sdp->no_uld_attach = 1;
3640 return 0;
3641 }
3642
3643 static void scsi_debug_slave_destroy(struct scsi_device *sdp)
3644 {
3645 struct sdebug_dev_info *devip =
3646 (struct sdebug_dev_info *)sdp->hostdata;
3647
3648 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
3649 pr_info("slave_destroy <%u %u %u %llu>\n",
3650 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
3651 if (devip) {
3652 /* make this slot available for re-use */
3653 devip->used = false;
3654 sdp->hostdata = NULL;
3655 }
3656 }
3657
3658 /* Returns 1 if cmnd found (deletes its timer or tasklet), else returns 0 */
3659 static int stop_queued_cmnd(struct scsi_cmnd *cmnd)
3660 {
3661 unsigned long iflags;
3662 int k, qmax, r_qmax;
3663 struct sdebug_queued_cmd *sqcp;
3664 struct sdebug_dev_info *devip;
3665
3666 spin_lock_irqsave(&queued_arr_lock, iflags);
3667 qmax = scsi_debug_max_queue;
3668 r_qmax = atomic_read(&retired_max_queue);
3669 if (r_qmax > qmax)
3670 qmax = r_qmax;
3671 for (k = 0; k < qmax; ++k) {
3672 if (test_bit(k, queued_in_use_bm)) {
3673 sqcp = &queued_arr[k];
3674 if (cmnd == sqcp->a_cmnd) {
3675 devip = (struct sdebug_dev_info *)
3676 cmnd->device->hostdata;
3677 if (devip)
3678 atomic_dec(&devip->num_in_q);
3679 sqcp->a_cmnd = NULL;
3680 spin_unlock_irqrestore(&queued_arr_lock,
3681 iflags);
3682 if (scsi_debug_ndelay > 0) {
3683 if (sqcp->sd_hrtp)
3684 hrtimer_cancel(
3685 &sqcp->sd_hrtp->hrt);
3686 } else if (scsi_debug_delay > 0) {
3687 if (sqcp->cmnd_timerp)
3688 del_timer_sync(
3689 sqcp->cmnd_timerp);
3690 } else if (scsi_debug_delay < 0) {
3691 if (sqcp->tletp)
3692 tasklet_kill(sqcp->tletp);
3693 }
3694 clear_bit(k, queued_in_use_bm);
3695 return 1;
3696 }
3697 }
3698 }
3699 spin_unlock_irqrestore(&queued_arr_lock, iflags);
3700 return 0;
3701 }
3702
3703 /* Deletes (stops) timers or tasklets of all queued commands */
3704 static void stop_all_queued(void)
3705 {
3706 unsigned long iflags;
3707 int k;
3708 struct sdebug_queued_cmd *sqcp;
3709 struct sdebug_dev_info *devip;
3710
3711 spin_lock_irqsave(&queued_arr_lock, iflags);
3712 for (k = 0; k < SCSI_DEBUG_CANQUEUE; ++k) {
3713 if (test_bit(k, queued_in_use_bm)) {
3714 sqcp = &queued_arr[k];
3715 if (sqcp->a_cmnd) {
3716 devip = (struct sdebug_dev_info *)
3717 sqcp->a_cmnd->device->hostdata;
3718 if (devip)
3719 atomic_dec(&devip->num_in_q);
3720 sqcp->a_cmnd = NULL;
3721 spin_unlock_irqrestore(&queued_arr_lock,
3722 iflags);
3723 if (scsi_debug_ndelay > 0) {
3724 if (sqcp->sd_hrtp)
3725 hrtimer_cancel(
3726 &sqcp->sd_hrtp->hrt);
3727 } else if (scsi_debug_delay > 0) {
3728 if (sqcp->cmnd_timerp)
3729 del_timer_sync(
3730 sqcp->cmnd_timerp);
3731 } else if (scsi_debug_delay < 0) {
3732 if (sqcp->tletp)
3733 tasklet_kill(sqcp->tletp);
3734 }
3735 clear_bit(k, queued_in_use_bm);
3736 spin_lock_irqsave(&queued_arr_lock, iflags);
3737 }
3738 }
3739 }
3740 spin_unlock_irqrestore(&queued_arr_lock, iflags);
3741 }
3742
3743 /* Free queued command memory on heap */
3744 static void free_all_queued(void)
3745 {
3746 unsigned long iflags;
3747 int k;
3748 struct sdebug_queued_cmd *sqcp;
3749
3750 spin_lock_irqsave(&queued_arr_lock, iflags);
3751 for (k = 0; k < SCSI_DEBUG_CANQUEUE; ++k) {
3752 sqcp = &queued_arr[k];
3753 kfree(sqcp->cmnd_timerp);
3754 sqcp->cmnd_timerp = NULL;
3755 kfree(sqcp->tletp);
3756 sqcp->tletp = NULL;
3757 kfree(sqcp->sd_hrtp);
3758 sqcp->sd_hrtp = NULL;
3759 }
3760 spin_unlock_irqrestore(&queued_arr_lock, iflags);
3761 }
3762
3763 static int scsi_debug_abort(struct scsi_cmnd *SCpnt)
3764 {
3765 ++num_aborts;
3766 if (SCpnt) {
3767 if (SCpnt->device &&
3768 (SCSI_DEBUG_OPT_ALL_NOISE & scsi_debug_opts))
3769 sdev_printk(KERN_INFO, SCpnt->device, "%s\n",
3770 __func__);
3771 stop_queued_cmnd(SCpnt);
3772 }
3773 return SUCCESS;
3774 }
3775
3776 static int scsi_debug_device_reset(struct scsi_cmnd * SCpnt)
3777 {
3778 struct sdebug_dev_info * devip;
3779
3780 ++num_dev_resets;
3781 if (SCpnt && SCpnt->device) {
3782 struct scsi_device *sdp = SCpnt->device;
3783
3784 if (SCSI_DEBUG_OPT_ALL_NOISE & scsi_debug_opts)
3785 sdev_printk(KERN_INFO, sdp, "%s\n", __func__);
3786 devip = devInfoReg(sdp);
3787 if (devip)
3788 set_bit(SDEBUG_UA_POR, devip->uas_bm);
3789 }
3790 return SUCCESS;
3791 }
3792
3793 static int scsi_debug_target_reset(struct scsi_cmnd *SCpnt)
3794 {
3795 struct sdebug_host_info *sdbg_host;
3796 struct sdebug_dev_info *devip;
3797 struct scsi_device *sdp;
3798 struct Scsi_Host *hp;
3799 int k = 0;
3800
3801 ++num_target_resets;
3802 if (!SCpnt)
3803 goto lie;
3804 sdp = SCpnt->device;
3805 if (!sdp)
3806 goto lie;
3807 if (SCSI_DEBUG_OPT_ALL_NOISE & scsi_debug_opts)
3808 sdev_printk(KERN_INFO, sdp, "%s\n", __func__);
3809 hp = sdp->host;
3810 if (!hp)
3811 goto lie;
3812 sdbg_host = *(struct sdebug_host_info **)shost_priv(hp);
3813 if (sdbg_host) {
3814 list_for_each_entry(devip,
3815 &sdbg_host->dev_info_list,
3816 dev_list)
3817 if (devip->target == sdp->id) {
3818 set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm);
3819 ++k;
3820 }
3821 }
3822 if (SCSI_DEBUG_OPT_RESET_NOISE & scsi_debug_opts)
3823 sdev_printk(KERN_INFO, sdp,
3824 "%s: %d device(s) found in target\n", __func__, k);
3825 lie:
3826 return SUCCESS;
3827 }
3828
3829 static int scsi_debug_bus_reset(struct scsi_cmnd * SCpnt)
3830 {
3831 struct sdebug_host_info *sdbg_host;
3832 struct sdebug_dev_info *devip;
3833 struct scsi_device * sdp;
3834 struct Scsi_Host * hp;
3835 int k = 0;
3836
3837 ++num_bus_resets;
3838 if (!(SCpnt && SCpnt->device))
3839 goto lie;
3840 sdp = SCpnt->device;
3841 if (SCSI_DEBUG_OPT_ALL_NOISE & scsi_debug_opts)
3842 sdev_printk(KERN_INFO, sdp, "%s\n", __func__);
3843 hp = sdp->host;
3844 if (hp) {
3845 sdbg_host = *(struct sdebug_host_info **)shost_priv(hp);
3846 if (sdbg_host) {
3847 list_for_each_entry(devip,
3848 &sdbg_host->dev_info_list,
3849 dev_list) {
3850 set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm);
3851 ++k;
3852 }
3853 }
3854 }
3855 if (SCSI_DEBUG_OPT_RESET_NOISE & scsi_debug_opts)
3856 sdev_printk(KERN_INFO, sdp,
3857 "%s: %d device(s) found in host\n", __func__, k);
3858 lie:
3859 return SUCCESS;
3860 }
3861
3862 static int scsi_debug_host_reset(struct scsi_cmnd * SCpnt)
3863 {
3864 struct sdebug_host_info * sdbg_host;
3865 struct sdebug_dev_info *devip;
3866 int k = 0;
3867
3868 ++num_host_resets;
3869 if ((SCpnt->device) && (SCSI_DEBUG_OPT_ALL_NOISE & scsi_debug_opts))
3870 sdev_printk(KERN_INFO, SCpnt->device, "%s\n", __func__);
3871 spin_lock(&sdebug_host_list_lock);
3872 list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) {
3873 list_for_each_entry(devip, &sdbg_host->dev_info_list,
3874 dev_list) {
3875 set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm);
3876 ++k;
3877 }
3878 }
3879 spin_unlock(&sdebug_host_list_lock);
3880 stop_all_queued();
3881 if (SCSI_DEBUG_OPT_RESET_NOISE & scsi_debug_opts)
3882 sdev_printk(KERN_INFO, SCpnt->device,
3883 "%s: %d device(s) found\n", __func__, k);
3884 return SUCCESS;
3885 }
3886
3887 static void __init sdebug_build_parts(unsigned char *ramp,
3888 unsigned long store_size)
3889 {
3890 struct partition * pp;
3891 int starts[SDEBUG_MAX_PARTS + 2];
3892 int sectors_per_part, num_sectors, k;
3893 int heads_by_sects, start_sec, end_sec;
3894
3895 /* assume partition table already zeroed */
3896 if ((scsi_debug_num_parts < 1) || (store_size < 1048576))
3897 return;
3898 if (scsi_debug_num_parts > SDEBUG_MAX_PARTS) {
3899 scsi_debug_num_parts = SDEBUG_MAX_PARTS;
3900 pr_warn("reducing partitions to %d\n", SDEBUG_MAX_PARTS);
3901 }
3902 num_sectors = (int)sdebug_store_sectors;
3903 sectors_per_part = (num_sectors - sdebug_sectors_per)
3904 / scsi_debug_num_parts;
3905 heads_by_sects = sdebug_heads * sdebug_sectors_per;
3906 starts[0] = sdebug_sectors_per;
3907 for (k = 1; k < scsi_debug_num_parts; ++k)
3908 starts[k] = ((k * sectors_per_part) / heads_by_sects)
3909 * heads_by_sects;
3910 starts[scsi_debug_num_parts] = num_sectors;
3911 starts[scsi_debug_num_parts + 1] = 0;
3912
3913 ramp[510] = 0x55; /* magic partition markings */
3914 ramp[511] = 0xAA;
3915 pp = (struct partition *)(ramp + 0x1be);
3916 for (k = 0; starts[k + 1]; ++k, ++pp) {
3917 start_sec = starts[k];
3918 end_sec = starts[k + 1] - 1;
3919 pp->boot_ind = 0;
3920
3921 pp->cyl = start_sec / heads_by_sects;
3922 pp->head = (start_sec - (pp->cyl * heads_by_sects))
3923 / sdebug_sectors_per;
3924 pp->sector = (start_sec % sdebug_sectors_per) + 1;
3925
3926 pp->end_cyl = end_sec / heads_by_sects;
3927 pp->end_head = (end_sec - (pp->end_cyl * heads_by_sects))
3928 / sdebug_sectors_per;
3929 pp->end_sector = (end_sec % sdebug_sectors_per) + 1;
3930
3931 pp->start_sect = cpu_to_le32(start_sec);
3932 pp->nr_sects = cpu_to_le32(end_sec - start_sec + 1);
3933 pp->sys_ind = 0x83; /* plain Linux partition */
3934 }
3935 }
3936
3937 static int
3938 schedule_resp(struct scsi_cmnd *cmnd, struct sdebug_dev_info *devip,
3939 int scsi_result, int delta_jiff)
3940 {
3941 unsigned long iflags;
3942 int k, num_in_q, qdepth, inject;
3943 struct sdebug_queued_cmd *sqcp = NULL;
3944 struct scsi_device *sdp;
3945
3946 /* this should never happen */
3947 if (WARN_ON(!cmnd))
3948 return SCSI_MLQUEUE_HOST_BUSY;
3949
3950 if (NULL == devip) {
3951 pr_warn("called devip == NULL\n");
3952 /* no particularly good error to report back */
3953 return SCSI_MLQUEUE_HOST_BUSY;
3954 }
3955
3956 sdp = cmnd->device;
3957
3958 if ((scsi_result) && (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts))
3959 sdev_printk(KERN_INFO, sdp, "%s: non-zero result=0x%x\n",
3960 __func__, scsi_result);
3961 if (delta_jiff == 0)
3962 goto respond_in_thread;
3963
3964 /* schedule the response at a later time if resources permit */
3965 spin_lock_irqsave(&queued_arr_lock, iflags);
3966 num_in_q = atomic_read(&devip->num_in_q);
3967 qdepth = cmnd->device->queue_depth;
3968 inject = 0;
3969 if ((qdepth > 0) && (num_in_q >= qdepth)) {
3970 if (scsi_result) {
3971 spin_unlock_irqrestore(&queued_arr_lock, iflags);
3972 goto respond_in_thread;
3973 } else
3974 scsi_result = device_qfull_result;
3975 } else if ((scsi_debug_every_nth != 0) &&
3976 (SCSI_DEBUG_OPT_RARE_TSF & scsi_debug_opts) &&
3977 (scsi_result == 0)) {
3978 if ((num_in_q == (qdepth - 1)) &&
3979 (atomic_inc_return(&sdebug_a_tsf) >=
3980 abs(scsi_debug_every_nth))) {
3981 atomic_set(&sdebug_a_tsf, 0);
3982 inject = 1;
3983 scsi_result = device_qfull_result;
3984 }
3985 }
3986
3987 k = find_first_zero_bit(queued_in_use_bm, scsi_debug_max_queue);
3988 if (k >= scsi_debug_max_queue) {
3989 spin_unlock_irqrestore(&queued_arr_lock, iflags);
3990 if (scsi_result)
3991 goto respond_in_thread;
3992 else if (SCSI_DEBUG_OPT_ALL_TSF & scsi_debug_opts)
3993 scsi_result = device_qfull_result;
3994 if (SCSI_DEBUG_OPT_Q_NOISE & scsi_debug_opts)
3995 sdev_printk(KERN_INFO, sdp,
3996 "%s: max_queue=%d exceeded, %s\n",
3997 __func__, scsi_debug_max_queue,
3998 (scsi_result ? "status: TASK SET FULL" :
3999 "report: host busy"));
4000 if (scsi_result)
4001 goto respond_in_thread;
4002 else
4003 return SCSI_MLQUEUE_HOST_BUSY;
4004 }
4005 __set_bit(k, queued_in_use_bm);
4006 atomic_inc(&devip->num_in_q);
4007 sqcp = &queued_arr[k];
4008 sqcp->a_cmnd = cmnd;
4009 cmnd->result = scsi_result;
4010 spin_unlock_irqrestore(&queued_arr_lock, iflags);
4011 if (delta_jiff > 0) {
4012 if (NULL == sqcp->cmnd_timerp) {
4013 sqcp->cmnd_timerp = kmalloc(sizeof(struct timer_list),
4014 GFP_ATOMIC);
4015 if (NULL == sqcp->cmnd_timerp)
4016 return SCSI_MLQUEUE_HOST_BUSY;
4017 init_timer(sqcp->cmnd_timerp);
4018 }
4019 sqcp->cmnd_timerp->function = sdebug_q_cmd_complete;
4020 sqcp->cmnd_timerp->data = k;
4021 sqcp->cmnd_timerp->expires = get_jiffies_64() + delta_jiff;
4022 add_timer(sqcp->cmnd_timerp);
4023 } else if (scsi_debug_ndelay > 0) {
4024 ktime_t kt = ktime_set(0, scsi_debug_ndelay);
4025 struct sdebug_hrtimer *sd_hp = sqcp->sd_hrtp;
4026
4027 if (NULL == sd_hp) {
4028 sd_hp = kmalloc(sizeof(*sd_hp), GFP_ATOMIC);
4029 if (NULL == sd_hp)
4030 return SCSI_MLQUEUE_HOST_BUSY;
4031 sqcp->sd_hrtp = sd_hp;
4032 hrtimer_init(&sd_hp->hrt, CLOCK_MONOTONIC,
4033 HRTIMER_MODE_REL);
4034 sd_hp->hrt.function = sdebug_q_cmd_hrt_complete;
4035 sd_hp->qa_indx = k;
4036 }
4037 hrtimer_start(&sd_hp->hrt, kt, HRTIMER_MODE_REL);
4038 } else { /* delay < 0 */
4039 if (NULL == sqcp->tletp) {
4040 sqcp->tletp = kmalloc(sizeof(*sqcp->tletp),
4041 GFP_ATOMIC);
4042 if (NULL == sqcp->tletp)
4043 return SCSI_MLQUEUE_HOST_BUSY;
4044 tasklet_init(sqcp->tletp,
4045 sdebug_q_cmd_complete, k);
4046 }
4047 if (-1 == delta_jiff)
4048 tasklet_hi_schedule(sqcp->tletp);
4049 else
4050 tasklet_schedule(sqcp->tletp);
4051 }
4052 if ((SCSI_DEBUG_OPT_Q_NOISE & scsi_debug_opts) &&
4053 (scsi_result == device_qfull_result))
4054 sdev_printk(KERN_INFO, sdp,
4055 "%s: num_in_q=%d +1, %s%s\n", __func__,
4056 num_in_q, (inject ? "<inject> " : ""),
4057 "status: TASK SET FULL");
4058 return 0;
4059
4060 respond_in_thread: /* call back to mid-layer using invocation thread */
4061 cmnd->result = scsi_result;
4062 cmnd->scsi_done(cmnd);
4063 return 0;
4064 }
4065
4066 /* Note: The following macros create attribute files in the
4067 /sys/module/scsi_debug/parameters directory. Unfortunately this
4068 driver is unaware of a change and cannot trigger auxiliary actions
4069 as it can when the corresponding attribute in the
4070 /sys/bus/pseudo/drivers/scsi_debug directory is changed.
4071 */
4072 module_param_named(add_host, scsi_debug_add_host, int, S_IRUGO | S_IWUSR);
4073 module_param_named(ato, scsi_debug_ato, int, S_IRUGO);
4074 module_param_named(clustering, scsi_debug_clustering, bool, S_IRUGO | S_IWUSR);
4075 module_param_named(delay, scsi_debug_delay, int, S_IRUGO | S_IWUSR);
4076 module_param_named(dev_size_mb, scsi_debug_dev_size_mb, int, S_IRUGO);
4077 module_param_named(dif, scsi_debug_dif, int, S_IRUGO);
4078 module_param_named(dix, scsi_debug_dix, int, S_IRUGO);
4079 module_param_named(dsense, scsi_debug_dsense, int, S_IRUGO | S_IWUSR);
4080 module_param_named(every_nth, scsi_debug_every_nth, int, S_IRUGO | S_IWUSR);
4081 module_param_named(fake_rw, scsi_debug_fake_rw, int, S_IRUGO | S_IWUSR);
4082 module_param_named(guard, scsi_debug_guard, uint, S_IRUGO);
4083 module_param_named(host_lock, scsi_debug_host_lock, bool, S_IRUGO | S_IWUSR);
4084 module_param_named(lbpu, scsi_debug_lbpu, int, S_IRUGO);
4085 module_param_named(lbpws, scsi_debug_lbpws, int, S_IRUGO);
4086 module_param_named(lbpws10, scsi_debug_lbpws10, int, S_IRUGO);
4087 module_param_named(lbprz, scsi_debug_lbprz, int, S_IRUGO);
4088 module_param_named(lowest_aligned, scsi_debug_lowest_aligned, int, S_IRUGO);
4089 module_param_named(max_luns, scsi_debug_max_luns, int, S_IRUGO | S_IWUSR);
4090 module_param_named(max_queue, scsi_debug_max_queue, int, S_IRUGO | S_IWUSR);
4091 module_param_named(ndelay, scsi_debug_ndelay, int, S_IRUGO | S_IWUSR);
4092 module_param_named(no_lun_0, scsi_debug_no_lun_0, int, S_IRUGO | S_IWUSR);
4093 module_param_named(no_uld, scsi_debug_no_uld, int, S_IRUGO);
4094 module_param_named(num_parts, scsi_debug_num_parts, int, S_IRUGO);
4095 module_param_named(num_tgts, scsi_debug_num_tgts, int, S_IRUGO | S_IWUSR);
4096 module_param_named(opt_blks, scsi_debug_opt_blks, int, S_IRUGO);
4097 module_param_named(opts, scsi_debug_opts, int, S_IRUGO | S_IWUSR);
4098 module_param_named(physblk_exp, scsi_debug_physblk_exp, int, S_IRUGO);
4099 module_param_named(ptype, scsi_debug_ptype, int, S_IRUGO | S_IWUSR);
4100 module_param_named(removable, scsi_debug_removable, bool, S_IRUGO | S_IWUSR);
4101 module_param_named(scsi_level, scsi_debug_scsi_level, int, S_IRUGO);
4102 module_param_named(sector_size, scsi_debug_sector_size, int, S_IRUGO);
4103 module_param_named(strict, scsi_debug_strict, bool, S_IRUGO | S_IWUSR);
4104 module_param_named(unmap_alignment, scsi_debug_unmap_alignment, int, S_IRUGO);
4105 module_param_named(unmap_granularity, scsi_debug_unmap_granularity, int, S_IRUGO);
4106 module_param_named(unmap_max_blocks, scsi_debug_unmap_max_blocks, int, S_IRUGO);
4107 module_param_named(unmap_max_desc, scsi_debug_unmap_max_desc, int, S_IRUGO);
4108 module_param_named(virtual_gb, scsi_debug_virtual_gb, int, S_IRUGO | S_IWUSR);
4109 module_param_named(vpd_use_hostno, scsi_debug_vpd_use_hostno, int,
4110 S_IRUGO | S_IWUSR);
4111 module_param_named(write_same_length, scsi_debug_write_same_length, int,
4112 S_IRUGO | S_IWUSR);
4113
4114 MODULE_AUTHOR("Eric Youngdale + Douglas Gilbert");
4115 MODULE_DESCRIPTION("SCSI debug adapter driver");
4116 MODULE_LICENSE("GPL");
4117 MODULE_VERSION(SCSI_DEBUG_VERSION);
4118
4119 MODULE_PARM_DESC(add_host, "0..127 hosts allowed(def=1)");
4120 MODULE_PARM_DESC(ato, "application tag ownership: 0=disk 1=host (def=1)");
4121 MODULE_PARM_DESC(clustering, "when set enables larger transfers (def=0)");
4122 MODULE_PARM_DESC(delay, "response delay (def=1 jiffy); 0:imm, -1,-2:tiny");
4123 MODULE_PARM_DESC(dev_size_mb, "size in MiB of ram shared by devs(def=8)");
4124 MODULE_PARM_DESC(dif, "data integrity field type: 0-3 (def=0)");
4125 MODULE_PARM_DESC(dix, "data integrity extensions mask (def=0)");
4126 MODULE_PARM_DESC(dsense, "use descriptor sense format(def=0 -> fixed)");
4127 MODULE_PARM_DESC(every_nth, "timeout every nth command(def=0)");
4128 MODULE_PARM_DESC(fake_rw, "fake reads/writes instead of copying (def=0)");
4129 MODULE_PARM_DESC(guard, "protection checksum: 0=crc, 1=ip (def=0)");
4130 MODULE_PARM_DESC(host_lock, "use host_lock around all commands (def=0)");
4131 MODULE_PARM_DESC(lbpu, "enable LBP, support UNMAP command (def=0)");
4132 MODULE_PARM_DESC(lbpws, "enable LBP, support WRITE SAME(16) with UNMAP bit (def=0)");
4133 MODULE_PARM_DESC(lbpws10, "enable LBP, support WRITE SAME(10) with UNMAP bit (def=0)");
4134 MODULE_PARM_DESC(lbprz, "unmapped blocks return 0 on read (def=1)");
4135 MODULE_PARM_DESC(lowest_aligned, "lowest aligned lba (def=0)");
4136 MODULE_PARM_DESC(max_luns, "number of LUNs per target to simulate(def=1)");
4137 MODULE_PARM_DESC(max_queue, "max number of queued commands (1 to max(def))");
4138 MODULE_PARM_DESC(ndelay, "response delay in nanoseconds (def=0 -> ignore)");
4139 MODULE_PARM_DESC(no_lun_0, "no LU number 0 (def=0 -> have lun 0)");
4140 MODULE_PARM_DESC(no_uld, "stop ULD (e.g. sd driver) attaching (def=0))");
4141 MODULE_PARM_DESC(num_parts, "number of partitions(def=0)");
4142 MODULE_PARM_DESC(num_tgts, "number of targets per host to simulate(def=1)");
4143 MODULE_PARM_DESC(opt_blks, "optimal transfer length in blocks (def=1024)");
4144 MODULE_PARM_DESC(opts, "1->noise, 2->medium_err, 4->timeout, 8->recovered_err... (def=0)");
4145 MODULE_PARM_DESC(physblk_exp, "physical block exponent (def=0)");
4146 MODULE_PARM_DESC(ptype, "SCSI peripheral type(def=0[disk])");
4147 MODULE_PARM_DESC(removable, "claim to have removable media (def=0)");
4148 MODULE_PARM_DESC(scsi_level, "SCSI level to simulate(def=6[SPC-4])");
4149 MODULE_PARM_DESC(sector_size, "logical block size in bytes (def=512)");
4150 MODULE_PARM_DESC(strict, "stricter checks: reserved field in cdb (def=0)");
4151 MODULE_PARM_DESC(unmap_alignment, "lowest aligned thin provisioning lba (def=0)");
4152 MODULE_PARM_DESC(unmap_granularity, "thin provisioning granularity in blocks (def=1)");
4153 MODULE_PARM_DESC(unmap_max_blocks, "max # of blocks can be unmapped in one cmd (def=0xffffffff)");
4154 MODULE_PARM_DESC(unmap_max_desc, "max # of ranges that can be unmapped in one cmd (def=256)");
4155 MODULE_PARM_DESC(virtual_gb, "virtual gigabyte (GiB) size (def=0 -> use dev_size_mb)");
4156 MODULE_PARM_DESC(vpd_use_hostno, "0 -> dev ids ignore hostno (def=1 -> unique dev ids)");
4157 MODULE_PARM_DESC(write_same_length, "Maximum blocks per WRITE SAME cmd (def=0xffff)");
4158
4159 static char sdebug_info[256];
4160
4161 static const char * scsi_debug_info(struct Scsi_Host * shp)
4162 {
4163 sprintf(sdebug_info, "scsi_debug, version %s [%s], "
4164 "dev_size_mb=%d, opts=0x%x", SCSI_DEBUG_VERSION,
4165 scsi_debug_version_date, scsi_debug_dev_size_mb,
4166 scsi_debug_opts);
4167 return sdebug_info;
4168 }
4169
4170 /* 'echo <val> > /proc/scsi/scsi_debug/<host_id>' writes to opts */
4171 static int scsi_debug_write_info(struct Scsi_Host *host, char *buffer, int length)
4172 {
4173 char arr[16];
4174 int opts;
4175 int minLen = length > 15 ? 15 : length;
4176
4177 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
4178 return -EACCES;
4179 memcpy(arr, buffer, minLen);
4180 arr[minLen] = '\0';
4181 if (1 != sscanf(arr, "%d", &opts))
4182 return -EINVAL;
4183 scsi_debug_opts = opts;
4184 if (scsi_debug_every_nth != 0)
4185 atomic_set(&sdebug_cmnd_count, 0);
4186 return length;
4187 }
4188
4189 /* Output seen with 'cat /proc/scsi/scsi_debug/<host_id>'. It will be the
4190 * same for each scsi_debug host (if more than one). Some of the counters
4191 * output are not atomics so might be inaccurate in a busy system. */
4192 static int scsi_debug_show_info(struct seq_file *m, struct Scsi_Host *host)
4193 {
4194 int f, l;
4195 char b[32];
4196
4197 if (scsi_debug_every_nth > 0)
4198 snprintf(b, sizeof(b), " (curr:%d)",
4199 ((SCSI_DEBUG_OPT_RARE_TSF & scsi_debug_opts) ?
4200 atomic_read(&sdebug_a_tsf) :
4201 atomic_read(&sdebug_cmnd_count)));
4202 else
4203 b[0] = '\0';
4204
4205 seq_printf(m, "scsi_debug adapter driver, version %s [%s]\n"
4206 "num_tgts=%d, shared (ram) size=%d MB, opts=0x%x, "
4207 "every_nth=%d%s\n"
4208 "delay=%d, ndelay=%d, max_luns=%d, q_completions=%d\n"
4209 "sector_size=%d bytes, cylinders=%d, heads=%d, sectors=%d\n"
4210 "command aborts=%d; RESETs: device=%d, target=%d, bus=%d, "
4211 "host=%d\ndix_reads=%d dix_writes=%d dif_errors=%d "
4212 "usec_in_jiffy=%lu\n",
4213 SCSI_DEBUG_VERSION, scsi_debug_version_date,
4214 scsi_debug_num_tgts, scsi_debug_dev_size_mb, scsi_debug_opts,
4215 scsi_debug_every_nth, b, scsi_debug_delay, scsi_debug_ndelay,
4216 scsi_debug_max_luns, atomic_read(&sdebug_completions),
4217 scsi_debug_sector_size, sdebug_cylinders_per, sdebug_heads,
4218 sdebug_sectors_per, num_aborts, num_dev_resets,
4219 num_target_resets, num_bus_resets, num_host_resets,
4220 dix_reads, dix_writes, dif_errors, TICK_NSEC / 1000);
4221
4222 f = find_first_bit(queued_in_use_bm, scsi_debug_max_queue);
4223 if (f != scsi_debug_max_queue) {
4224 l = find_last_bit(queued_in_use_bm, scsi_debug_max_queue);
4225 seq_printf(m, " %s BUSY: first,last bits set: %d,%d\n",
4226 "queued_in_use_bm", f, l);
4227 }
4228 return 0;
4229 }
4230
4231 static ssize_t delay_show(struct device_driver *ddp, char *buf)
4232 {
4233 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_delay);
4234 }
4235 /* Returns -EBUSY if delay is being changed and commands are queued */
4236 static ssize_t delay_store(struct device_driver *ddp, const char *buf,
4237 size_t count)
4238 {
4239 int delay, res;
4240
4241 if ((count > 0) && (1 == sscanf(buf, "%d", &delay))) {
4242 res = count;
4243 if (scsi_debug_delay != delay) {
4244 unsigned long iflags;
4245 int k;
4246
4247 spin_lock_irqsave(&queued_arr_lock, iflags);
4248 k = find_first_bit(queued_in_use_bm,
4249 scsi_debug_max_queue);
4250 if (k != scsi_debug_max_queue)
4251 res = -EBUSY; /* have queued commands */
4252 else {
4253 scsi_debug_delay = delay;
4254 scsi_debug_ndelay = 0;
4255 }
4256 spin_unlock_irqrestore(&queued_arr_lock, iflags);
4257 }
4258 return res;
4259 }
4260 return -EINVAL;
4261 }
4262 static DRIVER_ATTR_RW(delay);
4263
4264 static ssize_t ndelay_show(struct device_driver *ddp, char *buf)
4265 {
4266 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_ndelay);
4267 }
4268 /* Returns -EBUSY if ndelay is being changed and commands are queued */
4269 /* If > 0 and accepted then scsi_debug_delay is set to DELAY_OVERRIDDEN */
4270 static ssize_t ndelay_store(struct device_driver *ddp, const char *buf,
4271 size_t count)
4272 {
4273 unsigned long iflags;
4274 int ndelay, res, k;
4275
4276 if ((count > 0) && (1 == sscanf(buf, "%d", &ndelay)) &&
4277 (ndelay >= 0) && (ndelay < 1000000000)) {
4278 res = count;
4279 if (scsi_debug_ndelay != ndelay) {
4280 spin_lock_irqsave(&queued_arr_lock, iflags);
4281 k = find_first_bit(queued_in_use_bm,
4282 scsi_debug_max_queue);
4283 if (k != scsi_debug_max_queue)
4284 res = -EBUSY; /* have queued commands */
4285 else {
4286 scsi_debug_ndelay = ndelay;
4287 scsi_debug_delay = ndelay ? DELAY_OVERRIDDEN
4288 : DEF_DELAY;
4289 }
4290 spin_unlock_irqrestore(&queued_arr_lock, iflags);
4291 }
4292 return res;
4293 }
4294 return -EINVAL;
4295 }
4296 static DRIVER_ATTR_RW(ndelay);
4297
4298 static ssize_t opts_show(struct device_driver *ddp, char *buf)
4299 {
4300 return scnprintf(buf, PAGE_SIZE, "0x%x\n", scsi_debug_opts);
4301 }
4302
4303 static ssize_t opts_store(struct device_driver *ddp, const char *buf,
4304 size_t count)
4305 {
4306 int opts;
4307 char work[20];
4308
4309 if (1 == sscanf(buf, "%10s", work)) {
4310 if (0 == strncasecmp(work,"0x", 2)) {
4311 if (1 == sscanf(&work[2], "%x", &opts))
4312 goto opts_done;
4313 } else {
4314 if (1 == sscanf(work, "%d", &opts))
4315 goto opts_done;
4316 }
4317 }
4318 return -EINVAL;
4319 opts_done:
4320 scsi_debug_opts = opts;
4321 if (SCSI_DEBUG_OPT_RECOVERED_ERR & opts)
4322 sdebug_any_injecting_opt = true;
4323 else if (SCSI_DEBUG_OPT_TRANSPORT_ERR & opts)
4324 sdebug_any_injecting_opt = true;
4325 else if (SCSI_DEBUG_OPT_DIF_ERR & opts)
4326 sdebug_any_injecting_opt = true;
4327 else if (SCSI_DEBUG_OPT_DIX_ERR & opts)
4328 sdebug_any_injecting_opt = true;
4329 else if (SCSI_DEBUG_OPT_SHORT_TRANSFER & opts)
4330 sdebug_any_injecting_opt = true;
4331 atomic_set(&sdebug_cmnd_count, 0);
4332 atomic_set(&sdebug_a_tsf, 0);
4333 return count;
4334 }
4335 static DRIVER_ATTR_RW(opts);
4336
4337 static ssize_t ptype_show(struct device_driver *ddp, char *buf)
4338 {
4339 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_ptype);
4340 }
4341 static ssize_t ptype_store(struct device_driver *ddp, const char *buf,
4342 size_t count)
4343 {
4344 int n;
4345
4346 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
4347 scsi_debug_ptype = n;
4348 return count;
4349 }
4350 return -EINVAL;
4351 }
4352 static DRIVER_ATTR_RW(ptype);
4353
4354 static ssize_t dsense_show(struct device_driver *ddp, char *buf)
4355 {
4356 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dsense);
4357 }
4358 static ssize_t dsense_store(struct device_driver *ddp, const char *buf,
4359 size_t count)
4360 {
4361 int n;
4362
4363 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
4364 scsi_debug_dsense = n;
4365 return count;
4366 }
4367 return -EINVAL;
4368 }
4369 static DRIVER_ATTR_RW(dsense);
4370
4371 static ssize_t fake_rw_show(struct device_driver *ddp, char *buf)
4372 {
4373 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_fake_rw);
4374 }
4375 static ssize_t fake_rw_store(struct device_driver *ddp, const char *buf,
4376 size_t count)
4377 {
4378 int n;
4379
4380 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
4381 n = (n > 0);
4382 scsi_debug_fake_rw = (scsi_debug_fake_rw > 0);
4383 if (scsi_debug_fake_rw != n) {
4384 if ((0 == n) && (NULL == fake_storep)) {
4385 unsigned long sz =
4386 (unsigned long)scsi_debug_dev_size_mb *
4387 1048576;
4388
4389 fake_storep = vmalloc(sz);
4390 if (NULL == fake_storep) {
4391 pr_err("out of memory, 9\n");
4392 return -ENOMEM;
4393 }
4394 memset(fake_storep, 0, sz);
4395 }
4396 scsi_debug_fake_rw = n;
4397 }
4398 return count;
4399 }
4400 return -EINVAL;
4401 }
4402 static DRIVER_ATTR_RW(fake_rw);
4403
4404 static ssize_t no_lun_0_show(struct device_driver *ddp, char *buf)
4405 {
4406 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_no_lun_0);
4407 }
4408 static ssize_t no_lun_0_store(struct device_driver *ddp, const char *buf,
4409 size_t count)
4410 {
4411 int n;
4412
4413 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
4414 scsi_debug_no_lun_0 = n;
4415 return count;
4416 }
4417 return -EINVAL;
4418 }
4419 static DRIVER_ATTR_RW(no_lun_0);
4420
4421 static ssize_t num_tgts_show(struct device_driver *ddp, char *buf)
4422 {
4423 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_num_tgts);
4424 }
4425 static ssize_t num_tgts_store(struct device_driver *ddp, const char *buf,
4426 size_t count)
4427 {
4428 int n;
4429
4430 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
4431 scsi_debug_num_tgts = n;
4432 sdebug_max_tgts_luns();
4433 return count;
4434 }
4435 return -EINVAL;
4436 }
4437 static DRIVER_ATTR_RW(num_tgts);
4438
4439 static ssize_t dev_size_mb_show(struct device_driver *ddp, char *buf)
4440 {
4441 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dev_size_mb);
4442 }
4443 static DRIVER_ATTR_RO(dev_size_mb);
4444
4445 static ssize_t num_parts_show(struct device_driver *ddp, char *buf)
4446 {
4447 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_num_parts);
4448 }
4449 static DRIVER_ATTR_RO(num_parts);
4450
4451 static ssize_t every_nth_show(struct device_driver *ddp, char *buf)
4452 {
4453 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_every_nth);
4454 }
4455 static ssize_t every_nth_store(struct device_driver *ddp, const char *buf,
4456 size_t count)
4457 {
4458 int nth;
4459
4460 if ((count > 0) && (1 == sscanf(buf, "%d", &nth))) {
4461 scsi_debug_every_nth = nth;
4462 atomic_set(&sdebug_cmnd_count, 0);
4463 return count;
4464 }
4465 return -EINVAL;
4466 }
4467 static DRIVER_ATTR_RW(every_nth);
4468
4469 static ssize_t max_luns_show(struct device_driver *ddp, char *buf)
4470 {
4471 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_max_luns);
4472 }
4473 static ssize_t max_luns_store(struct device_driver *ddp, const char *buf,
4474 size_t count)
4475 {
4476 int n;
4477 bool changed;
4478
4479 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
4480 changed = (scsi_debug_max_luns != n);
4481 scsi_debug_max_luns = n;
4482 sdebug_max_tgts_luns();
4483 if (changed && (scsi_debug_scsi_level >= 5)) { /* >= SPC-3 */
4484 struct sdebug_host_info *sdhp;
4485 struct sdebug_dev_info *dp;
4486
4487 spin_lock(&sdebug_host_list_lock);
4488 list_for_each_entry(sdhp, &sdebug_host_list,
4489 host_list) {
4490 list_for_each_entry(dp, &sdhp->dev_info_list,
4491 dev_list) {
4492 set_bit(SDEBUG_UA_LUNS_CHANGED,
4493 dp->uas_bm);
4494 }
4495 }
4496 spin_unlock(&sdebug_host_list_lock);
4497 }
4498 return count;
4499 }
4500 return -EINVAL;
4501 }
4502 static DRIVER_ATTR_RW(max_luns);
4503
4504 static ssize_t max_queue_show(struct device_driver *ddp, char *buf)
4505 {
4506 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_max_queue);
4507 }
4508 /* N.B. max_queue can be changed while there are queued commands. In flight
4509 * commands beyond the new max_queue will be completed. */
4510 static ssize_t max_queue_store(struct device_driver *ddp, const char *buf,
4511 size_t count)
4512 {
4513 unsigned long iflags;
4514 int n, k;
4515
4516 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n > 0) &&
4517 (n <= SCSI_DEBUG_CANQUEUE)) {
4518 spin_lock_irqsave(&queued_arr_lock, iflags);
4519 k = find_last_bit(queued_in_use_bm, SCSI_DEBUG_CANQUEUE);
4520 scsi_debug_max_queue = n;
4521 if (SCSI_DEBUG_CANQUEUE == k)
4522 atomic_set(&retired_max_queue, 0);
4523 else if (k >= n)
4524 atomic_set(&retired_max_queue, k + 1);
4525 else
4526 atomic_set(&retired_max_queue, 0);
4527 spin_unlock_irqrestore(&queued_arr_lock, iflags);
4528 return count;
4529 }
4530 return -EINVAL;
4531 }
4532 static DRIVER_ATTR_RW(max_queue);
4533
4534 static ssize_t no_uld_show(struct device_driver *ddp, char *buf)
4535 {
4536 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_no_uld);
4537 }
4538 static DRIVER_ATTR_RO(no_uld);
4539
4540 static ssize_t scsi_level_show(struct device_driver *ddp, char *buf)
4541 {
4542 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_scsi_level);
4543 }
4544 static DRIVER_ATTR_RO(scsi_level);
4545
4546 static ssize_t virtual_gb_show(struct device_driver *ddp, char *buf)
4547 {
4548 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_virtual_gb);
4549 }
4550 static ssize_t virtual_gb_store(struct device_driver *ddp, const char *buf,
4551 size_t count)
4552 {
4553 int n;
4554 bool changed;
4555
4556 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
4557 changed = (scsi_debug_virtual_gb != n);
4558 scsi_debug_virtual_gb = n;
4559 sdebug_capacity = get_sdebug_capacity();
4560 if (changed) {
4561 struct sdebug_host_info *sdhp;
4562 struct sdebug_dev_info *dp;
4563
4564 spin_lock(&sdebug_host_list_lock);
4565 list_for_each_entry(sdhp, &sdebug_host_list,
4566 host_list) {
4567 list_for_each_entry(dp, &sdhp->dev_info_list,
4568 dev_list) {
4569 set_bit(SDEBUG_UA_CAPACITY_CHANGED,
4570 dp->uas_bm);
4571 }
4572 }
4573 spin_unlock(&sdebug_host_list_lock);
4574 }
4575 return count;
4576 }
4577 return -EINVAL;
4578 }
4579 static DRIVER_ATTR_RW(virtual_gb);
4580
4581 static ssize_t add_host_show(struct device_driver *ddp, char *buf)
4582 {
4583 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_add_host);
4584 }
4585
4586 static ssize_t add_host_store(struct device_driver *ddp, const char *buf,
4587 size_t count)
4588 {
4589 int delta_hosts;
4590
4591 if (sscanf(buf, "%d", &delta_hosts) != 1)
4592 return -EINVAL;
4593 if (delta_hosts > 0) {
4594 do {
4595 sdebug_add_adapter();
4596 } while (--delta_hosts);
4597 } else if (delta_hosts < 0) {
4598 do {
4599 sdebug_remove_adapter();
4600 } while (++delta_hosts);
4601 }
4602 return count;
4603 }
4604 static DRIVER_ATTR_RW(add_host);
4605
4606 static ssize_t vpd_use_hostno_show(struct device_driver *ddp, char *buf)
4607 {
4608 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_vpd_use_hostno);
4609 }
4610 static ssize_t vpd_use_hostno_store(struct device_driver *ddp, const char *buf,
4611 size_t count)
4612 {
4613 int n;
4614
4615 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
4616 scsi_debug_vpd_use_hostno = n;
4617 return count;
4618 }
4619 return -EINVAL;
4620 }
4621 static DRIVER_ATTR_RW(vpd_use_hostno);
4622
4623 static ssize_t sector_size_show(struct device_driver *ddp, char *buf)
4624 {
4625 return scnprintf(buf, PAGE_SIZE, "%u\n", scsi_debug_sector_size);
4626 }
4627 static DRIVER_ATTR_RO(sector_size);
4628
4629 static ssize_t dix_show(struct device_driver *ddp, char *buf)
4630 {
4631 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dix);
4632 }
4633 static DRIVER_ATTR_RO(dix);
4634
4635 static ssize_t dif_show(struct device_driver *ddp, char *buf)
4636 {
4637 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dif);
4638 }
4639 static DRIVER_ATTR_RO(dif);
4640
4641 static ssize_t guard_show(struct device_driver *ddp, char *buf)
4642 {
4643 return scnprintf(buf, PAGE_SIZE, "%u\n", scsi_debug_guard);
4644 }
4645 static DRIVER_ATTR_RO(guard);
4646
4647 static ssize_t ato_show(struct device_driver *ddp, char *buf)
4648 {
4649 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_ato);
4650 }
4651 static DRIVER_ATTR_RO(ato);
4652
4653 static ssize_t map_show(struct device_driver *ddp, char *buf)
4654 {
4655 ssize_t count;
4656
4657 if (!scsi_debug_lbp())
4658 return scnprintf(buf, PAGE_SIZE, "0-%u\n",
4659 sdebug_store_sectors);
4660
4661 count = scnprintf(buf, PAGE_SIZE - 1, "%*pbl",
4662 (int)map_size, map_storep);
4663 buf[count++] = '\n';
4664 buf[count] = '\0';
4665
4666 return count;
4667 }
4668 static DRIVER_ATTR_RO(map);
4669
4670 static ssize_t removable_show(struct device_driver *ddp, char *buf)
4671 {
4672 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_removable ? 1 : 0);
4673 }
4674 static ssize_t removable_store(struct device_driver *ddp, const char *buf,
4675 size_t count)
4676 {
4677 int n;
4678
4679 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
4680 scsi_debug_removable = (n > 0);
4681 return count;
4682 }
4683 return -EINVAL;
4684 }
4685 static DRIVER_ATTR_RW(removable);
4686
4687 static ssize_t host_lock_show(struct device_driver *ddp, char *buf)
4688 {
4689 return scnprintf(buf, PAGE_SIZE, "%d\n", !!scsi_debug_host_lock);
4690 }
4691 /* Returns -EBUSY if host_lock is being changed and commands are queued */
4692 static ssize_t host_lock_store(struct device_driver *ddp, const char *buf,
4693 size_t count)
4694 {
4695 int n, res;
4696
4697 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
4698 bool new_host_lock = (n > 0);
4699
4700 res = count;
4701 if (new_host_lock != scsi_debug_host_lock) {
4702 unsigned long iflags;
4703 int k;
4704
4705 spin_lock_irqsave(&queued_arr_lock, iflags);
4706 k = find_first_bit(queued_in_use_bm,
4707 scsi_debug_max_queue);
4708 if (k != scsi_debug_max_queue)
4709 res = -EBUSY; /* have queued commands */
4710 else
4711 scsi_debug_host_lock = new_host_lock;
4712 spin_unlock_irqrestore(&queued_arr_lock, iflags);
4713 }
4714 return res;
4715 }
4716 return -EINVAL;
4717 }
4718 static DRIVER_ATTR_RW(host_lock);
4719
4720 static ssize_t strict_show(struct device_driver *ddp, char *buf)
4721 {
4722 return scnprintf(buf, PAGE_SIZE, "%d\n", !!scsi_debug_strict);
4723 }
4724 static ssize_t strict_store(struct device_driver *ddp, const char *buf,
4725 size_t count)
4726 {
4727 int n;
4728
4729 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
4730 scsi_debug_strict = (n > 0);
4731 return count;
4732 }
4733 return -EINVAL;
4734 }
4735 static DRIVER_ATTR_RW(strict);
4736
4737
4738 /* Note: The following array creates attribute files in the
4739 /sys/bus/pseudo/drivers/scsi_debug directory. The advantage of these
4740 files (over those found in the /sys/module/scsi_debug/parameters
4741 directory) is that auxiliary actions can be triggered when an attribute
4742 is changed. For example see: sdebug_add_host_store() above.
4743 */
4744
4745 static struct attribute *sdebug_drv_attrs[] = {
4746 &driver_attr_delay.attr,
4747 &driver_attr_opts.attr,
4748 &driver_attr_ptype.attr,
4749 &driver_attr_dsense.attr,
4750 &driver_attr_fake_rw.attr,
4751 &driver_attr_no_lun_0.attr,
4752 &driver_attr_num_tgts.attr,
4753 &driver_attr_dev_size_mb.attr,
4754 &driver_attr_num_parts.attr,
4755 &driver_attr_every_nth.attr,
4756 &driver_attr_max_luns.attr,
4757 &driver_attr_max_queue.attr,
4758 &driver_attr_no_uld.attr,
4759 &driver_attr_scsi_level.attr,
4760 &driver_attr_virtual_gb.attr,
4761 &driver_attr_add_host.attr,
4762 &driver_attr_vpd_use_hostno.attr,
4763 &driver_attr_sector_size.attr,
4764 &driver_attr_dix.attr,
4765 &driver_attr_dif.attr,
4766 &driver_attr_guard.attr,
4767 &driver_attr_ato.attr,
4768 &driver_attr_map.attr,
4769 &driver_attr_removable.attr,
4770 &driver_attr_host_lock.attr,
4771 &driver_attr_ndelay.attr,
4772 &driver_attr_strict.attr,
4773 NULL,
4774 };
4775 ATTRIBUTE_GROUPS(sdebug_drv);
4776
4777 static struct device *pseudo_primary;
4778
4779 static int __init scsi_debug_init(void)
4780 {
4781 unsigned long sz;
4782 int host_to_add;
4783 int k;
4784 int ret;
4785
4786 atomic_set(&sdebug_cmnd_count, 0);
4787 atomic_set(&sdebug_completions, 0);
4788 atomic_set(&retired_max_queue, 0);
4789
4790 if (scsi_debug_ndelay >= 1000000000) {
4791 pr_warn("ndelay must be less than 1 second, ignored\n");
4792 scsi_debug_ndelay = 0;
4793 } else if (scsi_debug_ndelay > 0)
4794 scsi_debug_delay = DELAY_OVERRIDDEN;
4795
4796 switch (scsi_debug_sector_size) {
4797 case 512:
4798 case 1024:
4799 case 2048:
4800 case 4096:
4801 break;
4802 default:
4803 pr_err("invalid sector_size %d\n", scsi_debug_sector_size);
4804 return -EINVAL;
4805 }
4806
4807 switch (scsi_debug_dif) {
4808
4809 case SD_DIF_TYPE0_PROTECTION:
4810 case SD_DIF_TYPE1_PROTECTION:
4811 case SD_DIF_TYPE2_PROTECTION:
4812 case SD_DIF_TYPE3_PROTECTION:
4813 break;
4814
4815 default:
4816 pr_err("dif must be 0, 1, 2 or 3\n");
4817 return -EINVAL;
4818 }
4819
4820 if (scsi_debug_guard > 1) {
4821 pr_err("guard must be 0 or 1\n");
4822 return -EINVAL;
4823 }
4824
4825 if (scsi_debug_ato > 1) {
4826 pr_err("ato must be 0 or 1\n");
4827 return -EINVAL;
4828 }
4829
4830 if (scsi_debug_physblk_exp > 15) {
4831 pr_err("invalid physblk_exp %u\n", scsi_debug_physblk_exp);
4832 return -EINVAL;
4833 }
4834
4835 if (scsi_debug_lowest_aligned > 0x3fff) {
4836 pr_err("lowest_aligned too big: %u\n",
4837 scsi_debug_lowest_aligned);
4838 return -EINVAL;
4839 }
4840
4841 if (scsi_debug_dev_size_mb < 1)
4842 scsi_debug_dev_size_mb = 1; /* force minimum 1 MB ramdisk */
4843 sz = (unsigned long)scsi_debug_dev_size_mb * 1048576;
4844 sdebug_store_sectors = sz / scsi_debug_sector_size;
4845 sdebug_capacity = get_sdebug_capacity();
4846
4847 /* play around with geometry, don't waste too much on track 0 */
4848 sdebug_heads = 8;
4849 sdebug_sectors_per = 32;
4850 if (scsi_debug_dev_size_mb >= 256)
4851 sdebug_heads = 64;
4852 else if (scsi_debug_dev_size_mb >= 16)
4853 sdebug_heads = 32;
4854 sdebug_cylinders_per = (unsigned long)sdebug_capacity /
4855 (sdebug_sectors_per * sdebug_heads);
4856 if (sdebug_cylinders_per >= 1024) {
4857 /* other LLDs do this; implies >= 1GB ram disk ... */
4858 sdebug_heads = 255;
4859 sdebug_sectors_per = 63;
4860 sdebug_cylinders_per = (unsigned long)sdebug_capacity /
4861 (sdebug_sectors_per * sdebug_heads);
4862 }
4863
4864 if (0 == scsi_debug_fake_rw) {
4865 fake_storep = vmalloc(sz);
4866 if (NULL == fake_storep) {
4867 pr_err("out of memory, 1\n");
4868 return -ENOMEM;
4869 }
4870 memset(fake_storep, 0, sz);
4871 if (scsi_debug_num_parts > 0)
4872 sdebug_build_parts(fake_storep, sz);
4873 }
4874
4875 if (scsi_debug_dix) {
4876 int dif_size;
4877
4878 dif_size = sdebug_store_sectors * sizeof(struct sd_dif_tuple);
4879 dif_storep = vmalloc(dif_size);
4880
4881 pr_err("dif_storep %u bytes @ %p\n", dif_size, dif_storep);
4882
4883 if (dif_storep == NULL) {
4884 pr_err("out of mem. (DIX)\n");
4885 ret = -ENOMEM;
4886 goto free_vm;
4887 }
4888
4889 memset(dif_storep, 0xff, dif_size);
4890 }
4891
4892 /* Logical Block Provisioning */
4893 if (scsi_debug_lbp()) {
4894 scsi_debug_unmap_max_blocks =
4895 clamp(scsi_debug_unmap_max_blocks, 0U, 0xffffffffU);
4896
4897 scsi_debug_unmap_max_desc =
4898 clamp(scsi_debug_unmap_max_desc, 0U, 256U);
4899
4900 scsi_debug_unmap_granularity =
4901 clamp(scsi_debug_unmap_granularity, 1U, 0xffffffffU);
4902
4903 if (scsi_debug_unmap_alignment &&
4904 scsi_debug_unmap_granularity <=
4905 scsi_debug_unmap_alignment) {
4906 pr_err("ERR: unmap_granularity <= unmap_alignment\n");
4907 return -EINVAL;
4908 }
4909
4910 map_size = lba_to_map_index(sdebug_store_sectors - 1) + 1;
4911 map_storep = vmalloc(BITS_TO_LONGS(map_size) * sizeof(long));
4912
4913 pr_info("%lu provisioning blocks\n", map_size);
4914
4915 if (map_storep == NULL) {
4916 pr_err("out of mem. (MAP)\n");
4917 ret = -ENOMEM;
4918 goto free_vm;
4919 }
4920
4921 bitmap_zero(map_storep, map_size);
4922
4923 /* Map first 1KB for partition table */
4924 if (scsi_debug_num_parts)
4925 map_region(0, 2);
4926 }
4927
4928 pseudo_primary = root_device_register("pseudo_0");
4929 if (IS_ERR(pseudo_primary)) {
4930 pr_warn("root_device_register() error\n");
4931 ret = PTR_ERR(pseudo_primary);
4932 goto free_vm;
4933 }
4934 ret = bus_register(&pseudo_lld_bus);
4935 if (ret < 0) {
4936 pr_warn("bus_register error: %d\n", ret);
4937 goto dev_unreg;
4938 }
4939 ret = driver_register(&sdebug_driverfs_driver);
4940 if (ret < 0) {
4941 pr_warn("driver_register error: %d\n", ret);
4942 goto bus_unreg;
4943 }
4944
4945 host_to_add = scsi_debug_add_host;
4946 scsi_debug_add_host = 0;
4947
4948 for (k = 0; k < host_to_add; k++) {
4949 if (sdebug_add_adapter()) {
4950 pr_err("sdebug_add_adapter failed k=%d\n", k);
4951 break;
4952 }
4953 }
4954
4955 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
4956 pr_info("built %d host(s)\n", scsi_debug_add_host);
4957
4958 return 0;
4959
4960 bus_unreg:
4961 bus_unregister(&pseudo_lld_bus);
4962 dev_unreg:
4963 root_device_unregister(pseudo_primary);
4964 free_vm:
4965 vfree(map_storep);
4966 vfree(dif_storep);
4967 vfree(fake_storep);
4968
4969 return ret;
4970 }
4971
4972 static void __exit scsi_debug_exit(void)
4973 {
4974 int k = scsi_debug_add_host;
4975
4976 stop_all_queued();
4977 free_all_queued();
4978 for (; k; k--)
4979 sdebug_remove_adapter();
4980 driver_unregister(&sdebug_driverfs_driver);
4981 bus_unregister(&pseudo_lld_bus);
4982 root_device_unregister(pseudo_primary);
4983
4984 vfree(dif_storep);
4985 vfree(fake_storep);
4986 }
4987
4988 device_initcall(scsi_debug_init);
4989 module_exit(scsi_debug_exit);
4990
4991 static void sdebug_release_adapter(struct device * dev)
4992 {
4993 struct sdebug_host_info *sdbg_host;
4994
4995 sdbg_host = to_sdebug_host(dev);
4996 kfree(sdbg_host);
4997 }
4998
4999 static int sdebug_add_adapter(void)
5000 {
5001 int k, devs_per_host;
5002 int error = 0;
5003 struct sdebug_host_info *sdbg_host;
5004 struct sdebug_dev_info *sdbg_devinfo, *tmp;
5005
5006 sdbg_host = kzalloc(sizeof(*sdbg_host),GFP_KERNEL);
5007 if (NULL == sdbg_host) {
5008 pr_err("out of memory at line %d\n", __LINE__);
5009 return -ENOMEM;
5010 }
5011
5012 INIT_LIST_HEAD(&sdbg_host->dev_info_list);
5013
5014 devs_per_host = scsi_debug_num_tgts * scsi_debug_max_luns;
5015 for (k = 0; k < devs_per_host; k++) {
5016 sdbg_devinfo = sdebug_device_create(sdbg_host, GFP_KERNEL);
5017 if (!sdbg_devinfo) {
5018 pr_err("out of memory at line %d\n", __LINE__);
5019 error = -ENOMEM;
5020 goto clean;
5021 }
5022 }
5023
5024 spin_lock(&sdebug_host_list_lock);
5025 list_add_tail(&sdbg_host->host_list, &sdebug_host_list);
5026 spin_unlock(&sdebug_host_list_lock);
5027
5028 sdbg_host->dev.bus = &pseudo_lld_bus;
5029 sdbg_host->dev.parent = pseudo_primary;
5030 sdbg_host->dev.release = &sdebug_release_adapter;
5031 dev_set_name(&sdbg_host->dev, "adapter%d", scsi_debug_add_host);
5032
5033 error = device_register(&sdbg_host->dev);
5034
5035 if (error)
5036 goto clean;
5037
5038 ++scsi_debug_add_host;
5039 return error;
5040
5041 clean:
5042 list_for_each_entry_safe(sdbg_devinfo, tmp, &sdbg_host->dev_info_list,
5043 dev_list) {
5044 list_del(&sdbg_devinfo->dev_list);
5045 kfree(sdbg_devinfo);
5046 }
5047
5048 kfree(sdbg_host);
5049 return error;
5050 }
5051
5052 static void sdebug_remove_adapter(void)
5053 {
5054 struct sdebug_host_info * sdbg_host = NULL;
5055
5056 spin_lock(&sdebug_host_list_lock);
5057 if (!list_empty(&sdebug_host_list)) {
5058 sdbg_host = list_entry(sdebug_host_list.prev,
5059 struct sdebug_host_info, host_list);
5060 list_del(&sdbg_host->host_list);
5061 }
5062 spin_unlock(&sdebug_host_list_lock);
5063
5064 if (!sdbg_host)
5065 return;
5066
5067 device_unregister(&sdbg_host->dev);
5068 --scsi_debug_add_host;
5069 }
5070
5071 static int
5072 sdebug_change_qdepth(struct scsi_device *sdev, int qdepth)
5073 {
5074 int num_in_q = 0;
5075 unsigned long iflags;
5076 struct sdebug_dev_info *devip;
5077
5078 spin_lock_irqsave(&queued_arr_lock, iflags);
5079 devip = (struct sdebug_dev_info *)sdev->hostdata;
5080 if (NULL == devip) {
5081 spin_unlock_irqrestore(&queued_arr_lock, iflags);
5082 return -ENODEV;
5083 }
5084 num_in_q = atomic_read(&devip->num_in_q);
5085 spin_unlock_irqrestore(&queued_arr_lock, iflags);
5086
5087 if (qdepth < 1)
5088 qdepth = 1;
5089 /* allow to exceed max host queued_arr elements for testing */
5090 if (qdepth > SCSI_DEBUG_CANQUEUE + 10)
5091 qdepth = SCSI_DEBUG_CANQUEUE + 10;
5092 scsi_change_queue_depth(sdev, qdepth);
5093
5094 if (SCSI_DEBUG_OPT_Q_NOISE & scsi_debug_opts) {
5095 sdev_printk(KERN_INFO, sdev,
5096 "%s: qdepth=%d, num_in_q=%d\n",
5097 __func__, qdepth, num_in_q);
5098 }
5099 return sdev->queue_depth;
5100 }
5101
5102 static int
5103 check_inject(struct scsi_cmnd *scp)
5104 {
5105 struct sdebug_scmd_extra_t *ep = scsi_cmd_priv(scp);
5106
5107 memset(ep, 0, sizeof(struct sdebug_scmd_extra_t));
5108
5109 if (atomic_inc_return(&sdebug_cmnd_count) >=
5110 abs(scsi_debug_every_nth)) {
5111 atomic_set(&sdebug_cmnd_count, 0);
5112 if (scsi_debug_every_nth < -1)
5113 scsi_debug_every_nth = -1;
5114 if (SCSI_DEBUG_OPT_TIMEOUT & scsi_debug_opts)
5115 return 1; /* ignore command causing timeout */
5116 else if (SCSI_DEBUG_OPT_MAC_TIMEOUT & scsi_debug_opts &&
5117 scsi_medium_access_command(scp))
5118 return 1; /* time out reads and writes */
5119 if (sdebug_any_injecting_opt) {
5120 int opts = scsi_debug_opts;
5121
5122 if (SCSI_DEBUG_OPT_RECOVERED_ERR & opts)
5123 ep->inj_recovered = true;
5124 else if (SCSI_DEBUG_OPT_TRANSPORT_ERR & opts)
5125 ep->inj_transport = true;
5126 else if (SCSI_DEBUG_OPT_DIF_ERR & opts)
5127 ep->inj_dif = true;
5128 else if (SCSI_DEBUG_OPT_DIX_ERR & opts)
5129 ep->inj_dix = true;
5130 else if (SCSI_DEBUG_OPT_SHORT_TRANSFER & opts)
5131 ep->inj_short = true;
5132 }
5133 }
5134 return 0;
5135 }
5136
5137 static int
5138 scsi_debug_queuecommand(struct scsi_cmnd *scp)
5139 {
5140 u8 sdeb_i;
5141 struct scsi_device *sdp = scp->device;
5142 const struct opcode_info_t *oip;
5143 const struct opcode_info_t *r_oip;
5144 struct sdebug_dev_info *devip;
5145 u8 *cmd = scp->cmnd;
5146 int (*r_pfp)(struct scsi_cmnd *, struct sdebug_dev_info *);
5147 int k, na;
5148 int errsts = 0;
5149 int errsts_no_connect = DID_NO_CONNECT << 16;
5150 u32 flags;
5151 u16 sa;
5152 u8 opcode = cmd[0];
5153 bool has_wlun_rl;
5154 bool debug = !!(SCSI_DEBUG_OPT_NOISE & scsi_debug_opts);
5155
5156 scsi_set_resid(scp, 0);
5157 if (debug && !(SCSI_DEBUG_OPT_NO_CDB_NOISE & scsi_debug_opts)) {
5158 char b[120];
5159 int n, len, sb;
5160
5161 len = scp->cmd_len;
5162 sb = (int)sizeof(b);
5163 if (len > 32)
5164 strcpy(b, "too long, over 32 bytes");
5165 else {
5166 for (k = 0, n = 0; k < len && n < sb; ++k)
5167 n += scnprintf(b + n, sb - n, "%02x ",
5168 (u32)cmd[k]);
5169 }
5170 sdev_printk(KERN_INFO, sdp, "%s: cmd %s\n", my_name, b);
5171 }
5172 has_wlun_rl = (sdp->lun == SCSI_W_LUN_REPORT_LUNS);
5173 if ((sdp->lun >= scsi_debug_max_luns) && !has_wlun_rl)
5174 return schedule_resp(scp, NULL, errsts_no_connect, 0);
5175
5176 sdeb_i = opcode_ind_arr[opcode]; /* fully mapped */
5177 oip = &opcode_info_arr[sdeb_i]; /* safe if table consistent */
5178 devip = (struct sdebug_dev_info *)sdp->hostdata;
5179 if (!devip) {
5180 devip = devInfoReg(sdp);
5181 if (NULL == devip)
5182 return schedule_resp(scp, NULL, errsts_no_connect, 0);
5183 }
5184 na = oip->num_attached;
5185 r_pfp = oip->pfp;
5186 if (na) { /* multiple commands with this opcode */
5187 r_oip = oip;
5188 if (FF_SA & r_oip->flags) {
5189 if (F_SA_LOW & oip->flags)
5190 sa = 0x1f & cmd[1];
5191 else
5192 sa = get_unaligned_be16(cmd + 8);
5193 for (k = 0; k <= na; oip = r_oip->arrp + k++) {
5194 if (opcode == oip->opcode && sa == oip->sa)
5195 break;
5196 }
5197 } else { /* since no service action only check opcode */
5198 for (k = 0; k <= na; oip = r_oip->arrp + k++) {
5199 if (opcode == oip->opcode)
5200 break;
5201 }
5202 }
5203 if (k > na) {
5204 if (F_SA_LOW & r_oip->flags)
5205 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 4);
5206 else if (F_SA_HIGH & r_oip->flags)
5207 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 8, 7);
5208 else
5209 mk_sense_invalid_opcode(scp);
5210 goto check_cond;
5211 }
5212 } /* else (when na==0) we assume the oip is a match */
5213 flags = oip->flags;
5214 if (F_INV_OP & flags) {
5215 mk_sense_invalid_opcode(scp);
5216 goto check_cond;
5217 }
5218 if (has_wlun_rl && !(F_RL_WLUN_OK & flags)) {
5219 if (debug)
5220 sdev_printk(KERN_INFO, sdp, "scsi_debug: Opcode: "
5221 "0x%x not supported for wlun\n", opcode);
5222 mk_sense_invalid_opcode(scp);
5223 goto check_cond;
5224 }
5225 if (scsi_debug_strict) { /* check cdb against mask */
5226 u8 rem;
5227 int j;
5228
5229 for (k = 1; k < oip->len_mask[0] && k < 16; ++k) {
5230 rem = ~oip->len_mask[k] & cmd[k];
5231 if (rem) {
5232 for (j = 7; j >= 0; --j, rem <<= 1) {
5233 if (0x80 & rem)
5234 break;
5235 }
5236 mk_sense_invalid_fld(scp, SDEB_IN_CDB, k, j);
5237 goto check_cond;
5238 }
5239 }
5240 }
5241 if (!(F_SKIP_UA & flags) &&
5242 SDEBUG_NUM_UAS != find_first_bit(devip->uas_bm, SDEBUG_NUM_UAS)) {
5243 errsts = check_readiness(scp, UAS_ONLY, devip);
5244 if (errsts)
5245 goto check_cond;
5246 }
5247 if ((F_M_ACCESS & flags) && devip->stopped) {
5248 mk_sense_buffer(scp, NOT_READY, LOGICAL_UNIT_NOT_READY, 0x2);
5249 if (debug)
5250 sdev_printk(KERN_INFO, sdp, "%s reports: Not ready: "
5251 "%s\n", my_name, "initializing command "
5252 "required");
5253 errsts = check_condition_result;
5254 goto fini;
5255 }
5256 if (scsi_debug_fake_rw && (F_FAKE_RW & flags))
5257 goto fini;
5258 if (scsi_debug_every_nth) {
5259 if (check_inject(scp))
5260 return 0; /* ignore command: make trouble */
5261 }
5262 if (oip->pfp) /* if this command has a resp_* function, call it */
5263 errsts = oip->pfp(scp, devip);
5264 else if (r_pfp) /* if leaf function ptr NULL, try the root's */
5265 errsts = r_pfp(scp, devip);
5266
5267 fini:
5268 return schedule_resp(scp, devip, errsts,
5269 ((F_DELAY_OVERR & flags) ? 0 : scsi_debug_delay));
5270 check_cond:
5271 return schedule_resp(scp, devip, check_condition_result, 0);
5272 }
5273
5274 static int
5275 sdebug_queuecommand_lock_or_not(struct Scsi_Host *shost, struct scsi_cmnd *cmd)
5276 {
5277 if (scsi_debug_host_lock) {
5278 unsigned long iflags;
5279 int rc;
5280
5281 spin_lock_irqsave(shost->host_lock, iflags);
5282 rc = scsi_debug_queuecommand(cmd);
5283 spin_unlock_irqrestore(shost->host_lock, iflags);
5284 return rc;
5285 } else
5286 return scsi_debug_queuecommand(cmd);
5287 }
5288
5289 static struct scsi_host_template sdebug_driver_template = {
5290 .show_info = scsi_debug_show_info,
5291 .write_info = scsi_debug_write_info,
5292 .proc_name = sdebug_proc_name,
5293 .name = "SCSI DEBUG",
5294 .info = scsi_debug_info,
5295 .slave_alloc = scsi_debug_slave_alloc,
5296 .slave_configure = scsi_debug_slave_configure,
5297 .slave_destroy = scsi_debug_slave_destroy,
5298 .ioctl = scsi_debug_ioctl,
5299 .queuecommand = sdebug_queuecommand_lock_or_not,
5300 .change_queue_depth = sdebug_change_qdepth,
5301 .eh_abort_handler = scsi_debug_abort,
5302 .eh_device_reset_handler = scsi_debug_device_reset,
5303 .eh_target_reset_handler = scsi_debug_target_reset,
5304 .eh_bus_reset_handler = scsi_debug_bus_reset,
5305 .eh_host_reset_handler = scsi_debug_host_reset,
5306 .can_queue = SCSI_DEBUG_CANQUEUE,
5307 .this_id = 7,
5308 .sg_tablesize = SCSI_MAX_SG_CHAIN_SEGMENTS,
5309 .cmd_per_lun = DEF_CMD_PER_LUN,
5310 .max_sectors = -1U,
5311 .use_clustering = DISABLE_CLUSTERING,
5312 .module = THIS_MODULE,
5313 .track_queue_depth = 1,
5314 .cmd_size = sizeof(struct sdebug_scmd_extra_t),
5315 };
5316
5317 static int sdebug_driver_probe(struct device * dev)
5318 {
5319 int error = 0;
5320 int opts;
5321 struct sdebug_host_info *sdbg_host;
5322 struct Scsi_Host *hpnt;
5323 int host_prot;
5324
5325 sdbg_host = to_sdebug_host(dev);
5326
5327 sdebug_driver_template.can_queue = scsi_debug_max_queue;
5328 if (scsi_debug_clustering)
5329 sdebug_driver_template.use_clustering = ENABLE_CLUSTERING;
5330 hpnt = scsi_host_alloc(&sdebug_driver_template, sizeof(sdbg_host));
5331 if (NULL == hpnt) {
5332 pr_err("scsi_host_alloc failed\n");
5333 error = -ENODEV;
5334 return error;
5335 }
5336
5337 sdbg_host->shost = hpnt;
5338 *((struct sdebug_host_info **)hpnt->hostdata) = sdbg_host;
5339 if ((hpnt->this_id >= 0) && (scsi_debug_num_tgts > hpnt->this_id))
5340 hpnt->max_id = scsi_debug_num_tgts + 1;
5341 else
5342 hpnt->max_id = scsi_debug_num_tgts;
5343 /* = scsi_debug_max_luns; */
5344 hpnt->max_lun = SCSI_W_LUN_REPORT_LUNS + 1;
5345
5346 host_prot = 0;
5347
5348 switch (scsi_debug_dif) {
5349
5350 case SD_DIF_TYPE1_PROTECTION:
5351 host_prot = SHOST_DIF_TYPE1_PROTECTION;
5352 if (scsi_debug_dix)
5353 host_prot |= SHOST_DIX_TYPE1_PROTECTION;
5354 break;
5355
5356 case SD_DIF_TYPE2_PROTECTION:
5357 host_prot = SHOST_DIF_TYPE2_PROTECTION;
5358 if (scsi_debug_dix)
5359 host_prot |= SHOST_DIX_TYPE2_PROTECTION;
5360 break;
5361
5362 case SD_DIF_TYPE3_PROTECTION:
5363 host_prot = SHOST_DIF_TYPE3_PROTECTION;
5364 if (scsi_debug_dix)
5365 host_prot |= SHOST_DIX_TYPE3_PROTECTION;
5366 break;
5367
5368 default:
5369 if (scsi_debug_dix)
5370 host_prot |= SHOST_DIX_TYPE0_PROTECTION;
5371 break;
5372 }
5373
5374 scsi_host_set_prot(hpnt, host_prot);
5375
5376 pr_info("host protection%s%s%s%s%s%s%s\n",
5377 (host_prot & SHOST_DIF_TYPE1_PROTECTION) ? " DIF1" : "",
5378 (host_prot & SHOST_DIF_TYPE2_PROTECTION) ? " DIF2" : "",
5379 (host_prot & SHOST_DIF_TYPE3_PROTECTION) ? " DIF3" : "",
5380 (host_prot & SHOST_DIX_TYPE0_PROTECTION) ? " DIX0" : "",
5381 (host_prot & SHOST_DIX_TYPE1_PROTECTION) ? " DIX1" : "",
5382 (host_prot & SHOST_DIX_TYPE2_PROTECTION) ? " DIX2" : "",
5383 (host_prot & SHOST_DIX_TYPE3_PROTECTION) ? " DIX3" : "");
5384
5385 if (scsi_debug_guard == 1)
5386 scsi_host_set_guard(hpnt, SHOST_DIX_GUARD_IP);
5387 else
5388 scsi_host_set_guard(hpnt, SHOST_DIX_GUARD_CRC);
5389
5390 opts = scsi_debug_opts;
5391 if (SCSI_DEBUG_OPT_RECOVERED_ERR & opts)
5392 sdebug_any_injecting_opt = true;
5393 else if (SCSI_DEBUG_OPT_TRANSPORT_ERR & opts)
5394 sdebug_any_injecting_opt = true;
5395 else if (SCSI_DEBUG_OPT_DIF_ERR & opts)
5396 sdebug_any_injecting_opt = true;
5397 else if (SCSI_DEBUG_OPT_DIX_ERR & opts)
5398 sdebug_any_injecting_opt = true;
5399 else if (SCSI_DEBUG_OPT_SHORT_TRANSFER & opts)
5400 sdebug_any_injecting_opt = true;
5401
5402 error = scsi_add_host(hpnt, &sdbg_host->dev);
5403 if (error) {
5404 pr_err("scsi_add_host failed\n");
5405 error = -ENODEV;
5406 scsi_host_put(hpnt);
5407 } else
5408 scsi_scan_host(hpnt);
5409
5410 return error;
5411 }
5412
5413 static int sdebug_driver_remove(struct device * dev)
5414 {
5415 struct sdebug_host_info *sdbg_host;
5416 struct sdebug_dev_info *sdbg_devinfo, *tmp;
5417
5418 sdbg_host = to_sdebug_host(dev);
5419
5420 if (!sdbg_host) {
5421 pr_err("Unable to locate host info\n");
5422 return -ENODEV;
5423 }
5424
5425 scsi_remove_host(sdbg_host->shost);
5426
5427 list_for_each_entry_safe(sdbg_devinfo, tmp, &sdbg_host->dev_info_list,
5428 dev_list) {
5429 list_del(&sdbg_devinfo->dev_list);
5430 kfree(sdbg_devinfo);
5431 }
5432
5433 scsi_host_put(sdbg_host->shost);
5434 return 0;
5435 }
5436
5437 static int pseudo_lld_bus_match(struct device *dev,
5438 struct device_driver *dev_driver)
5439 {
5440 return 1;
5441 }
5442
5443 static struct bus_type pseudo_lld_bus = {
5444 .name = "pseudo",
5445 .match = pseudo_lld_bus_match,
5446 .probe = sdebug_driver_probe,
5447 .remove = sdebug_driver_remove,
5448 .drv_groups = sdebug_drv_groups,
5449 };
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