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Merge tag 'trace-seq-buf-3.19-v2' of git://git.kernel.org/pub/scm/linux/kernel/git...
[mirror_ubuntu-artful-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 #include <linux/module.h>
29
30 #include <linux/kernel.h>
31 #include <linux/errno.h>
32 #include <linux/timer.h>
33 #include <linux/slab.h>
34 #include <linux/types.h>
35 #include <linux/string.h>
36 #include <linux/genhd.h>
37 #include <linux/fs.h>
38 #include <linux/init.h>
39 #include <linux/proc_fs.h>
40 #include <linux/vmalloc.h>
41 #include <linux/moduleparam.h>
42 #include <linux/scatterlist.h>
43 #include <linux/blkdev.h>
44 #include <linux/crc-t10dif.h>
45 #include <linux/spinlock.h>
46 #include <linux/interrupt.h>
47 #include <linux/atomic.h>
48 #include <linux/hrtimer.h>
49
50 #include <net/checksum.h>
51
52 #include <asm/unaligned.h>
53
54 #include <scsi/scsi.h>
55 #include <scsi/scsi_cmnd.h>
56 #include <scsi/scsi_device.h>
57 #include <scsi/scsi_host.h>
58 #include <scsi/scsicam.h>
59 #include <scsi/scsi_eh.h>
60 #include <scsi/scsi_tcq.h>
61 #include <scsi/scsi_dbg.h>
62
63 #include "sd.h"
64 #include "scsi_logging.h"
65
66 #define SCSI_DEBUG_VERSION "1.85"
67 static const char *scsi_debug_version_date = "20141022";
68
69 #define MY_NAME "scsi_debug"
70
71 /* Additional Sense Code (ASC) */
72 #define NO_ADDITIONAL_SENSE 0x0
73 #define LOGICAL_UNIT_NOT_READY 0x4
74 #define LOGICAL_UNIT_COMMUNICATION_FAILURE 0x8
75 #define UNRECOVERED_READ_ERR 0x11
76 #define PARAMETER_LIST_LENGTH_ERR 0x1a
77 #define INVALID_OPCODE 0x20
78 #define LBA_OUT_OF_RANGE 0x21
79 #define INVALID_FIELD_IN_CDB 0x24
80 #define INVALID_FIELD_IN_PARAM_LIST 0x26
81 #define UA_RESET_ASC 0x29
82 #define UA_CHANGED_ASC 0x2a
83 #define INSUFF_RES_ASC 0x55
84 #define INSUFF_RES_ASCQ 0x3
85 #define POWER_ON_RESET_ASCQ 0x0
86 #define BUS_RESET_ASCQ 0x2 /* scsi bus reset occurred */
87 #define MODE_CHANGED_ASCQ 0x1 /* mode parameters changed */
88 #define CAPACITY_CHANGED_ASCQ 0x9
89 #define SAVING_PARAMS_UNSUP 0x39
90 #define TRANSPORT_PROBLEM 0x4b
91 #define THRESHOLD_EXCEEDED 0x5d
92 #define LOW_POWER_COND_ON 0x5e
93 #define MISCOMPARE_VERIFY_ASC 0x1d
94
95 /* Additional Sense Code Qualifier (ASCQ) */
96 #define ACK_NAK_TO 0x3
97
98
99 /* Default values for driver parameters */
100 #define DEF_NUM_HOST 1
101 #define DEF_NUM_TGTS 1
102 #define DEF_MAX_LUNS 1
103 /* With these defaults, this driver will make 1 host with 1 target
104 * (id 0) containing 1 logical unit (lun 0). That is 1 device.
105 */
106 #define DEF_ATO 1
107 #define DEF_DELAY 1 /* if > 0 unit is a jiffy */
108 #define DEF_DEV_SIZE_MB 8
109 #define DEF_DIF 0
110 #define DEF_DIX 0
111 #define DEF_D_SENSE 0
112 #define DEF_EVERY_NTH 0
113 #define DEF_FAKE_RW 0
114 #define DEF_GUARD 0
115 #define DEF_HOST_LOCK 0
116 #define DEF_LBPU 0
117 #define DEF_LBPWS 0
118 #define DEF_LBPWS10 0
119 #define DEF_LBPRZ 1
120 #define DEF_LOWEST_ALIGNED 0
121 #define DEF_NDELAY 0 /* if > 0 unit is a nanosecond */
122 #define DEF_NO_LUN_0 0
123 #define DEF_NUM_PARTS 0
124 #define DEF_OPTS 0
125 #define DEF_OPT_BLKS 64
126 #define DEF_PHYSBLK_EXP 0
127 #define DEF_PTYPE 0
128 #define DEF_REMOVABLE false
129 #define DEF_SCSI_LEVEL 6 /* INQUIRY, byte2 [6->SPC-4] */
130 #define DEF_SECTOR_SIZE 512
131 #define DEF_TAGGED_QUEUING 0 /* 0 | MSG_SIMPLE_TAG | MSG_ORDERED_TAG */
132 #define DEF_UNMAP_ALIGNMENT 0
133 #define DEF_UNMAP_GRANULARITY 1
134 #define DEF_UNMAP_MAX_BLOCKS 0xFFFFFFFF
135 #define DEF_UNMAP_MAX_DESC 256
136 #define DEF_VIRTUAL_GB 0
137 #define DEF_VPD_USE_HOSTNO 1
138 #define DEF_WRITESAME_LENGTH 0xFFFF
139 #define DEF_STRICT 0
140 #define DELAY_OVERRIDDEN -9999
141
142 /* bit mask values for scsi_debug_opts */
143 #define SCSI_DEBUG_OPT_NOISE 1
144 #define SCSI_DEBUG_OPT_MEDIUM_ERR 2
145 #define SCSI_DEBUG_OPT_TIMEOUT 4
146 #define SCSI_DEBUG_OPT_RECOVERED_ERR 8
147 #define SCSI_DEBUG_OPT_TRANSPORT_ERR 16
148 #define SCSI_DEBUG_OPT_DIF_ERR 32
149 #define SCSI_DEBUG_OPT_DIX_ERR 64
150 #define SCSI_DEBUG_OPT_MAC_TIMEOUT 128
151 #define SCSI_DEBUG_OPT_SHORT_TRANSFER 0x100
152 #define SCSI_DEBUG_OPT_Q_NOISE 0x200
153 #define SCSI_DEBUG_OPT_ALL_TSF 0x400
154 #define SCSI_DEBUG_OPT_RARE_TSF 0x800
155 #define SCSI_DEBUG_OPT_N_WCE 0x1000
156 #define SCSI_DEBUG_OPT_RESET_NOISE 0x2000
157 #define SCSI_DEBUG_OPT_NO_CDB_NOISE 0x4000
158 #define SCSI_DEBUG_OPT_ALL_NOISE (0x1 | 0x200 | 0x2000)
159 /* When "every_nth" > 0 then modulo "every_nth" commands:
160 * - a no response is simulated if SCSI_DEBUG_OPT_TIMEOUT is set
161 * - a RECOVERED_ERROR is simulated on successful read and write
162 * commands if SCSI_DEBUG_OPT_RECOVERED_ERR is set.
163 * - a TRANSPORT_ERROR is simulated on successful read and write
164 * commands if SCSI_DEBUG_OPT_TRANSPORT_ERR is set.
165 *
166 * When "every_nth" < 0 then after "- every_nth" commands:
167 * - a no response is simulated if SCSI_DEBUG_OPT_TIMEOUT is set
168 * - a RECOVERED_ERROR is simulated on successful read and write
169 * commands if SCSI_DEBUG_OPT_RECOVERED_ERR is set.
170 * - a TRANSPORT_ERROR is simulated on successful read and write
171 * commands if SCSI_DEBUG_OPT_TRANSPORT_ERR is set.
172 * This will continue until some other action occurs (e.g. the user
173 * writing a new value (other than -1 or 1) to every_nth via sysfs).
174 */
175
176 /* As indicated in SAM-5 and SPC-4 Unit Attentions (UAs)are returned in
177 * priority order. In the subset implemented here lower numbers have higher
178 * priority. The UA numbers should be a sequence starting from 0 with
179 * SDEBUG_NUM_UAS being 1 higher than the highest numbered UA. */
180 #define SDEBUG_UA_POR 0 /* Power on, reset, or bus device reset */
181 #define SDEBUG_UA_BUS_RESET 1
182 #define SDEBUG_UA_MODE_CHANGED 2
183 #define SDEBUG_UA_CAPACITY_CHANGED 3
184 #define SDEBUG_NUM_UAS 4
185
186 /* for check_readiness() */
187 #define UAS_ONLY 1 /* check for UAs only */
188 #define UAS_TUR 0 /* if no UAs then check if media access possible */
189
190 /* when 1==SCSI_DEBUG_OPT_MEDIUM_ERR, a medium error is simulated at this
191 * sector on read commands: */
192 #define OPT_MEDIUM_ERR_ADDR 0x1234 /* that's sector 4660 in decimal */
193 #define OPT_MEDIUM_ERR_NUM 10 /* number of consecutive medium errs */
194
195 /* If REPORT LUNS has luns >= 256 it can choose "flat space" (value 1)
196 * or "peripheral device" addressing (value 0) */
197 #define SAM2_LUN_ADDRESS_METHOD 0
198 #define SAM2_WLUN_REPORT_LUNS 0xc101
199
200 /* SCSI_DEBUG_CANQUEUE is the maximum number of commands that can be queued
201 * (for response) at one time. Can be reduced by max_queue option. Command
202 * responses are not queued when delay=0 and ndelay=0. The per-device
203 * DEF_CMD_PER_LUN can be changed via sysfs:
204 * /sys/class/scsi_device/<h:c:t:l>/device/queue_depth but cannot exceed
205 * SCSI_DEBUG_CANQUEUE. */
206 #define SCSI_DEBUG_CANQUEUE_WORDS 9 /* a WORD is bits in a long */
207 #define SCSI_DEBUG_CANQUEUE (SCSI_DEBUG_CANQUEUE_WORDS * BITS_PER_LONG)
208 #define DEF_CMD_PER_LUN 255
209
210 #if DEF_CMD_PER_LUN > SCSI_DEBUG_CANQUEUE
211 #warning "Expect DEF_CMD_PER_LUN <= SCSI_DEBUG_CANQUEUE"
212 #endif
213
214 /* SCSI opcodes (first byte of cdb) mapped onto these indexes */
215 enum sdeb_opcode_index {
216 SDEB_I_INVALID_OPCODE = 0,
217 SDEB_I_INQUIRY = 1,
218 SDEB_I_REPORT_LUNS = 2,
219 SDEB_I_REQUEST_SENSE = 3,
220 SDEB_I_TEST_UNIT_READY = 4,
221 SDEB_I_MODE_SENSE = 5, /* 6, 10 */
222 SDEB_I_MODE_SELECT = 6, /* 6, 10 */
223 SDEB_I_LOG_SENSE = 7,
224 SDEB_I_READ_CAPACITY = 8, /* 10; 16 is in SA_IN(16) */
225 SDEB_I_READ = 9, /* 6, 10, 12, 16 */
226 SDEB_I_WRITE = 10, /* 6, 10, 12, 16 */
227 SDEB_I_START_STOP = 11,
228 SDEB_I_SERV_ACT_IN = 12, /* 12, 16 */
229 SDEB_I_SERV_ACT_OUT = 13, /* 12, 16 */
230 SDEB_I_MAINT_IN = 14,
231 SDEB_I_MAINT_OUT = 15,
232 SDEB_I_VERIFY = 16, /* 10 only */
233 SDEB_I_VARIABLE_LEN = 17,
234 SDEB_I_RESERVE = 18, /* 6, 10 */
235 SDEB_I_RELEASE = 19, /* 6, 10 */
236 SDEB_I_ALLOW_REMOVAL = 20, /* PREVENT ALLOW MEDIUM REMOVAL */
237 SDEB_I_REZERO_UNIT = 21, /* REWIND in SSC */
238 SDEB_I_ATA_PT = 22, /* 12, 16 */
239 SDEB_I_SEND_DIAG = 23,
240 SDEB_I_UNMAP = 24,
241 SDEB_I_XDWRITEREAD = 25, /* 10 only */
242 SDEB_I_WRITE_BUFFER = 26,
243 SDEB_I_WRITE_SAME = 27, /* 10, 16 */
244 SDEB_I_SYNC_CACHE = 28, /* 10 only */
245 SDEB_I_COMP_WRITE = 29,
246 SDEB_I_LAST_ELEMENT = 30, /* keep this last */
247 };
248
249 static const unsigned char opcode_ind_arr[256] = {
250 /* 0x0; 0x0->0x1f: 6 byte cdbs */
251 SDEB_I_TEST_UNIT_READY, SDEB_I_REZERO_UNIT, 0, SDEB_I_REQUEST_SENSE,
252 0, 0, 0, 0,
253 SDEB_I_READ, 0, SDEB_I_WRITE, 0, 0, 0, 0, 0,
254 0, 0, SDEB_I_INQUIRY, 0, 0, SDEB_I_MODE_SELECT, SDEB_I_RESERVE,
255 SDEB_I_RELEASE,
256 0, 0, SDEB_I_MODE_SENSE, SDEB_I_START_STOP, 0, SDEB_I_SEND_DIAG,
257 SDEB_I_ALLOW_REMOVAL, 0,
258 /* 0x20; 0x20->0x3f: 10 byte cdbs */
259 0, 0, 0, 0, 0, SDEB_I_READ_CAPACITY, 0, 0,
260 SDEB_I_READ, 0, SDEB_I_WRITE, 0, 0, 0, 0, SDEB_I_VERIFY,
261 0, 0, 0, 0, 0, SDEB_I_SYNC_CACHE, 0, 0,
262 0, 0, 0, SDEB_I_WRITE_BUFFER, 0, 0, 0, 0,
263 /* 0x40; 0x40->0x5f: 10 byte cdbs */
264 0, SDEB_I_WRITE_SAME, SDEB_I_UNMAP, 0, 0, 0, 0, 0,
265 0, 0, 0, 0, 0, SDEB_I_LOG_SENSE, 0, 0,
266 0, 0, 0, SDEB_I_XDWRITEREAD, 0, SDEB_I_MODE_SELECT, SDEB_I_RESERVE,
267 SDEB_I_RELEASE,
268 0, 0, SDEB_I_MODE_SENSE, 0, 0, 0, 0, 0,
269 /* 0x60; 0x60->0x7d are reserved */
270 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
271 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
272 0, SDEB_I_VARIABLE_LEN,
273 /* 0x80; 0x80->0x9f: 16 byte cdbs */
274 0, 0, 0, 0, 0, SDEB_I_ATA_PT, 0, 0,
275 SDEB_I_READ, SDEB_I_COMP_WRITE, SDEB_I_WRITE, 0, 0, 0, 0, 0,
276 0, 0, 0, SDEB_I_WRITE_SAME, 0, 0, 0, 0,
277 0, 0, 0, 0, 0, 0, SDEB_I_SERV_ACT_IN, SDEB_I_SERV_ACT_OUT,
278 /* 0xa0; 0xa0->0xbf: 12 byte cdbs */
279 SDEB_I_REPORT_LUNS, SDEB_I_ATA_PT, 0, SDEB_I_MAINT_IN,
280 SDEB_I_MAINT_OUT, 0, 0, 0,
281 SDEB_I_READ, SDEB_I_SERV_ACT_OUT, SDEB_I_WRITE, SDEB_I_SERV_ACT_IN,
282 0, 0, 0, 0,
283 0, 0, 0, 0, 0, 0, 0, 0,
284 0, 0, 0, 0, 0, 0, 0, 0,
285 /* 0xc0; 0xc0->0xff: vendor specific */
286 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
287 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
288 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
289 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
290 };
291
292 #define F_D_IN 1
293 #define F_D_OUT 2
294 #define F_D_OUT_MAYBE 4 /* WRITE SAME, NDOB bit */
295 #define F_D_UNKN 8
296 #define F_RL_WLUN_OK 0x10
297 #define F_SKIP_UA 0x20
298 #define F_DELAY_OVERR 0x40
299 #define F_SA_LOW 0x80 /* cdb byte 1, bits 4 to 0 */
300 #define F_SA_HIGH 0x100 /* as used by variable length cdbs */
301 #define F_INV_OP 0x200
302 #define F_FAKE_RW 0x400
303 #define F_M_ACCESS 0x800 /* media access */
304
305 #define FF_RESPOND (F_RL_WLUN_OK | F_SKIP_UA | F_DELAY_OVERR)
306 #define FF_DIRECT_IO (F_M_ACCESS | F_FAKE_RW)
307 #define FF_SA (F_SA_HIGH | F_SA_LOW)
308
309 struct sdebug_dev_info;
310 static int resp_inquiry(struct scsi_cmnd *, struct sdebug_dev_info *);
311 static int resp_report_luns(struct scsi_cmnd *, struct sdebug_dev_info *);
312 static int resp_requests(struct scsi_cmnd *, struct sdebug_dev_info *);
313 static int resp_mode_sense(struct scsi_cmnd *, struct sdebug_dev_info *);
314 static int resp_mode_select(struct scsi_cmnd *, struct sdebug_dev_info *);
315 static int resp_log_sense(struct scsi_cmnd *, struct sdebug_dev_info *);
316 static int resp_readcap(struct scsi_cmnd *, struct sdebug_dev_info *);
317 static int resp_read_dt0(struct scsi_cmnd *, struct sdebug_dev_info *);
318 static int resp_write_dt0(struct scsi_cmnd *, struct sdebug_dev_info *);
319 static int resp_start_stop(struct scsi_cmnd *, struct sdebug_dev_info *);
320 static int resp_readcap16(struct scsi_cmnd *, struct sdebug_dev_info *);
321 static int resp_get_lba_status(struct scsi_cmnd *, struct sdebug_dev_info *);
322 static int resp_report_tgtpgs(struct scsi_cmnd *, struct sdebug_dev_info *);
323 static int resp_unmap(struct scsi_cmnd *, struct sdebug_dev_info *);
324 static int resp_rsup_opcodes(struct scsi_cmnd *, struct sdebug_dev_info *);
325 static int resp_rsup_tmfs(struct scsi_cmnd *, struct sdebug_dev_info *);
326 static int resp_write_same_10(struct scsi_cmnd *, struct sdebug_dev_info *);
327 static int resp_write_same_16(struct scsi_cmnd *, struct sdebug_dev_info *);
328 static int resp_xdwriteread_10(struct scsi_cmnd *, struct sdebug_dev_info *);
329 static int resp_comp_write(struct scsi_cmnd *, struct sdebug_dev_info *);
330
331 struct opcode_info_t {
332 u8 num_attached; /* 0 if this is it (i.e. a leaf); use 0xff
333 * for terminating element */
334 u8 opcode; /* if num_attached > 0, preferred */
335 u16 sa; /* service action */
336 u32 flags; /* OR-ed set of SDEB_F_* */
337 int (*pfp)(struct scsi_cmnd *, struct sdebug_dev_info *);
338 const struct opcode_info_t *arrp; /* num_attached elements or NULL */
339 u8 len_mask[16]; /* len=len_mask[0], then mask for cdb[1]... */
340 /* ignore cdb bytes after position 15 */
341 };
342
343 static const struct opcode_info_t msense_iarr[1] = {
344 {0, 0x1a, 0, F_D_IN, NULL, NULL,
345 {6, 0xe8, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
346 };
347
348 static const struct opcode_info_t mselect_iarr[1] = {
349 {0, 0x15, 0, F_D_OUT, NULL, NULL,
350 {6, 0xf1, 0, 0, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
351 };
352
353 static const struct opcode_info_t read_iarr[3] = {
354 {0, 0x28, 0, F_D_IN | FF_DIRECT_IO, resp_read_dt0, NULL,/* READ(10) */
355 {10, 0xff, 0xff, 0xff, 0xff, 0xff, 0x1f, 0xff, 0xff, 0xc7, 0, 0,
356 0, 0, 0, 0} },
357 {0, 0x8, 0, F_D_IN | FF_DIRECT_IO, resp_read_dt0, NULL, /* READ(6) */
358 {6, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
359 {0, 0xa8, 0, F_D_IN | FF_DIRECT_IO, resp_read_dt0, NULL,/* READ(12) */
360 {12, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x9f,
361 0xc7, 0, 0, 0, 0} },
362 };
363
364 static const struct opcode_info_t write_iarr[3] = {
365 {0, 0x2a, 0, F_D_OUT | FF_DIRECT_IO, resp_write_dt0, NULL, /* 10 */
366 {10, 0xfb, 0xff, 0xff, 0xff, 0xff, 0x1f, 0xff, 0xff, 0xc7, 0, 0,
367 0, 0, 0, 0} },
368 {0, 0xa, 0, F_D_OUT | FF_DIRECT_IO, resp_write_dt0, NULL, /* 6 */
369 {6, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
370 {0, 0xaa, 0, F_D_OUT | FF_DIRECT_IO, resp_write_dt0, NULL, /* 12 */
371 {12, 0xfb, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x9f,
372 0xc7, 0, 0, 0, 0} },
373 };
374
375 static const struct opcode_info_t sa_in_iarr[1] = {
376 {0, 0x9e, 0x12, F_SA_LOW | F_D_IN, resp_get_lba_status, NULL,
377 {16, 0x12, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
378 0xff, 0xff, 0xff, 0, 0xc7} },
379 };
380
381 static const struct opcode_info_t vl_iarr[1] = { /* VARIABLE LENGTH */
382 {0, 0x7f, 0xb, F_SA_HIGH | F_D_OUT | FF_DIRECT_IO, resp_write_dt0,
383 NULL, {32, 0xc7, 0, 0, 0, 0, 0x1f, 0x18, 0x0, 0xb, 0xfa,
384 0, 0xff, 0xff, 0xff, 0xff} }, /* WRITE(32) */
385 };
386
387 static const struct opcode_info_t maint_in_iarr[2] = {
388 {0, 0xa3, 0xc, F_SA_LOW | F_D_IN, resp_rsup_opcodes, NULL,
389 {12, 0xc, 0x87, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0,
390 0xc7, 0, 0, 0, 0} },
391 {0, 0xa3, 0xd, F_SA_LOW | F_D_IN, resp_rsup_tmfs, NULL,
392 {12, 0xd, 0x80, 0, 0, 0, 0xff, 0xff, 0xff, 0xff, 0, 0xc7, 0, 0,
393 0, 0} },
394 };
395
396 static const struct opcode_info_t write_same_iarr[1] = {
397 {0, 0x93, 0, F_D_OUT_MAYBE | FF_DIRECT_IO, resp_write_same_16, NULL,
398 {16, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
399 0xff, 0xff, 0xff, 0x1f, 0xc7} },
400 };
401
402 static const struct opcode_info_t reserve_iarr[1] = {
403 {0, 0x16, 0, F_D_OUT, NULL, NULL, /* RESERVE(6) */
404 {6, 0x1f, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
405 };
406
407 static const struct opcode_info_t release_iarr[1] = {
408 {0, 0x17, 0, F_D_OUT, NULL, NULL, /* RELEASE(6) */
409 {6, 0x1f, 0xff, 0, 0, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
410 };
411
412
413 /* This array is accessed via SDEB_I_* values. Make sure all are mapped,
414 * plus the terminating elements for logic that scans this table such as
415 * REPORT SUPPORTED OPERATION CODES. */
416 static const struct opcode_info_t opcode_info_arr[SDEB_I_LAST_ELEMENT + 1] = {
417 /* 0 */
418 {0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL,
419 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
420 {0, 0x12, 0, FF_RESPOND | F_D_IN, resp_inquiry, NULL,
421 {6, 0xe3, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
422 {0, 0xa0, 0, FF_RESPOND | F_D_IN, resp_report_luns, NULL,
423 {12, 0xe3, 0xff, 0, 0, 0, 0xff, 0xff, 0xff, 0xff, 0, 0xc7, 0, 0,
424 0, 0} },
425 {0, 0x3, 0, FF_RESPOND | F_D_IN, resp_requests, NULL,
426 {6, 0xe1, 0, 0, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
427 {0, 0x0, 0, F_M_ACCESS | F_RL_WLUN_OK, NULL, NULL,/* TEST UNIT READY */
428 {6, 0, 0, 0, 0, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
429 {1, 0x5a, 0, F_D_IN, resp_mode_sense, msense_iarr,
430 {10, 0xf8, 0xff, 0xff, 0, 0, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0,
431 0} },
432 {1, 0x55, 0, F_D_OUT, resp_mode_select, mselect_iarr,
433 {10, 0xf1, 0, 0, 0, 0, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0} },
434 {0, 0x4d, 0, F_D_IN, resp_log_sense, NULL,
435 {10, 0xe3, 0xff, 0xff, 0, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0,
436 0, 0, 0} },
437 {0, 0x25, 0, F_D_IN, resp_readcap, NULL,
438 {10, 0xe1, 0xff, 0xff, 0xff, 0xff, 0, 0, 0x1, 0xc7, 0, 0, 0, 0,
439 0, 0} },
440 {3, 0x88, 0, F_D_IN | FF_DIRECT_IO, resp_read_dt0, read_iarr,
441 {16, 0xfe, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
442 0xff, 0xff, 0xff, 0x9f, 0xc7} }, /* READ(16) */
443 /* 10 */
444 {3, 0x8a, 0, F_D_OUT | FF_DIRECT_IO, resp_write_dt0, write_iarr,
445 {16, 0xfa, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
446 0xff, 0xff, 0xff, 0x9f, 0xc7} }, /* WRITE(16) */
447 {0, 0x1b, 0, 0, resp_start_stop, NULL, /* START STOP UNIT */
448 {6, 0x1, 0, 0xf, 0xf7, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
449 {1, 0x9e, 0x10, F_SA_LOW | F_D_IN, resp_readcap16, sa_in_iarr,
450 {16, 0x10, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
451 0xff, 0xff, 0xff, 0x1, 0xc7} }, /* READ CAPACITY(16) */
452 {0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL, /* SA OUT */
453 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
454 {2, 0xa3, 0xa, F_SA_LOW | F_D_IN, resp_report_tgtpgs, maint_in_iarr,
455 {12, 0xea, 0, 0, 0, 0, 0xff, 0xff, 0xff, 0xff, 0, 0xc7, 0, 0, 0,
456 0} },
457 {0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL, /* MAINT OUT */
458 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
459 {0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL, /* VERIFY */
460 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
461 {1, 0x7f, 0x9, F_SA_HIGH | F_D_IN | FF_DIRECT_IO, resp_read_dt0,
462 vl_iarr, {32, 0xc7, 0, 0, 0, 0, 0x1f, 0x18, 0x0, 0x9, 0xfe, 0,
463 0xff, 0xff, 0xff, 0xff} },/* VARIABLE LENGTH, READ(32) */
464 {1, 0x56, 0, F_D_OUT, NULL, reserve_iarr, /* RESERVE(10) */
465 {10, 0xff, 0xff, 0xff, 0, 0, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0,
466 0} },
467 {1, 0x57, 0, F_D_OUT, NULL, release_iarr, /* RELEASE(10) */
468 {10, 0x13, 0xff, 0xff, 0, 0, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0,
469 0} },
470 /* 20 */
471 {0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL, /* ALLOW REMOVAL */
472 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
473 {0, 0x1, 0, 0, resp_start_stop, NULL, /* REWIND ?? */
474 {6, 0x1, 0, 0, 0, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
475 {0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL, /* ATA_PT */
476 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
477 {0, 0x1d, F_D_OUT, 0, NULL, NULL, /* SEND DIAGNOSTIC */
478 {6, 0xf7, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
479 {0, 0x42, 0, F_D_OUT | FF_DIRECT_IO, resp_unmap, NULL, /* UNMAP */
480 {10, 0x1, 0, 0, 0, 0, 0x1f, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0} },
481 {0, 0x53, 0, F_D_IN | F_D_OUT | FF_DIRECT_IO, resp_xdwriteread_10,
482 NULL, {10, 0xff, 0xff, 0xff, 0xff, 0xff, 0x1f, 0xff, 0xff, 0xc7,
483 0, 0, 0, 0, 0, 0} },
484 {0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL, /* WRITE_BUFFER */
485 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
486 {1, 0x41, 0, F_D_OUT_MAYBE | FF_DIRECT_IO, resp_write_same_10,
487 write_same_iarr, {10, 0xff, 0xff, 0xff, 0xff, 0xff, 0x1f, 0xff,
488 0xff, 0xc7, 0, 0, 0, 0, 0, 0} },
489 {0, 0x35, 0, F_DELAY_OVERR | FF_DIRECT_IO, NULL, NULL, /* SYNC_CACHE */
490 {10, 0x7, 0xff, 0xff, 0xff, 0xff, 0x1f, 0xff, 0xff, 0xc7, 0, 0,
491 0, 0, 0, 0} },
492 {0, 0x89, 0, F_D_OUT | FF_DIRECT_IO, resp_comp_write, NULL,
493 {16, 0xf8, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0, 0,
494 0, 0xff, 0x1f, 0xc7} }, /* COMPARE AND WRITE */
495
496 /* 30 */
497 {0xff, 0, 0, 0, NULL, NULL, /* terminating element */
498 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
499 };
500
501 struct sdebug_scmd_extra_t {
502 bool inj_recovered;
503 bool inj_transport;
504 bool inj_dif;
505 bool inj_dix;
506 bool inj_short;
507 };
508
509 static int scsi_debug_add_host = DEF_NUM_HOST;
510 static int scsi_debug_ato = DEF_ATO;
511 static int scsi_debug_delay = DEF_DELAY;
512 static int scsi_debug_dev_size_mb = DEF_DEV_SIZE_MB;
513 static int scsi_debug_dif = DEF_DIF;
514 static int scsi_debug_dix = DEF_DIX;
515 static int scsi_debug_dsense = DEF_D_SENSE;
516 static int scsi_debug_every_nth = DEF_EVERY_NTH;
517 static int scsi_debug_fake_rw = DEF_FAKE_RW;
518 static unsigned int scsi_debug_guard = DEF_GUARD;
519 static int scsi_debug_lowest_aligned = DEF_LOWEST_ALIGNED;
520 static int scsi_debug_max_luns = DEF_MAX_LUNS;
521 static int scsi_debug_max_queue = SCSI_DEBUG_CANQUEUE;
522 static atomic_t retired_max_queue; /* if > 0 then was prior max_queue */
523 static int scsi_debug_ndelay = DEF_NDELAY;
524 static int scsi_debug_no_lun_0 = DEF_NO_LUN_0;
525 static int scsi_debug_no_uld = 0;
526 static int scsi_debug_num_parts = DEF_NUM_PARTS;
527 static int scsi_debug_num_tgts = DEF_NUM_TGTS; /* targets per host */
528 static int scsi_debug_opt_blks = DEF_OPT_BLKS;
529 static int scsi_debug_opts = DEF_OPTS;
530 static int scsi_debug_physblk_exp = DEF_PHYSBLK_EXP;
531 static int scsi_debug_ptype = DEF_PTYPE; /* SCSI peripheral type (0==disk) */
532 static int scsi_debug_scsi_level = DEF_SCSI_LEVEL;
533 static int scsi_debug_sector_size = DEF_SECTOR_SIZE;
534 static int scsi_debug_virtual_gb = DEF_VIRTUAL_GB;
535 static int scsi_debug_vpd_use_hostno = DEF_VPD_USE_HOSTNO;
536 static unsigned int scsi_debug_lbpu = DEF_LBPU;
537 static unsigned int scsi_debug_lbpws = DEF_LBPWS;
538 static unsigned int scsi_debug_lbpws10 = DEF_LBPWS10;
539 static unsigned int scsi_debug_lbprz = DEF_LBPRZ;
540 static unsigned int scsi_debug_unmap_alignment = DEF_UNMAP_ALIGNMENT;
541 static unsigned int scsi_debug_unmap_granularity = DEF_UNMAP_GRANULARITY;
542 static unsigned int scsi_debug_unmap_max_blocks = DEF_UNMAP_MAX_BLOCKS;
543 static unsigned int scsi_debug_unmap_max_desc = DEF_UNMAP_MAX_DESC;
544 static unsigned int scsi_debug_write_same_length = DEF_WRITESAME_LENGTH;
545 static bool scsi_debug_removable = DEF_REMOVABLE;
546 static bool scsi_debug_clustering;
547 static bool scsi_debug_host_lock = DEF_HOST_LOCK;
548 static bool scsi_debug_strict = DEF_STRICT;
549 static bool sdebug_any_injecting_opt;
550
551 static atomic_t sdebug_cmnd_count;
552 static atomic_t sdebug_completions;
553 static atomic_t sdebug_a_tsf; /* counter of 'almost' TSFs */
554
555 #define DEV_READONLY(TGT) (0)
556
557 static unsigned int sdebug_store_sectors;
558 static sector_t sdebug_capacity; /* in sectors */
559
560 /* old BIOS stuff, kernel may get rid of them but some mode sense pages
561 may still need them */
562 static int sdebug_heads; /* heads per disk */
563 static int sdebug_cylinders_per; /* cylinders per surface */
564 static int sdebug_sectors_per; /* sectors per cylinder */
565
566 #define SDEBUG_MAX_PARTS 4
567
568 #define SCSI_DEBUG_MAX_CMD_LEN 32
569
570 static unsigned int scsi_debug_lbp(void)
571 {
572 return ((0 == scsi_debug_fake_rw) &&
573 (scsi_debug_lbpu | scsi_debug_lbpws | scsi_debug_lbpws10));
574 }
575
576 struct sdebug_dev_info {
577 struct list_head dev_list;
578 unsigned int channel;
579 unsigned int target;
580 u64 lun;
581 struct sdebug_host_info *sdbg_host;
582 unsigned long uas_bm[1];
583 atomic_t num_in_q;
584 char stopped; /* TODO: should be atomic */
585 bool used;
586 };
587
588 struct sdebug_host_info {
589 struct list_head host_list;
590 struct Scsi_Host *shost;
591 struct device dev;
592 struct list_head dev_info_list;
593 };
594
595 #define to_sdebug_host(d) \
596 container_of(d, struct sdebug_host_info, dev)
597
598 static LIST_HEAD(sdebug_host_list);
599 static DEFINE_SPINLOCK(sdebug_host_list_lock);
600
601
602 struct sdebug_hrtimer { /* ... is derived from hrtimer */
603 struct hrtimer hrt; /* must be first element */
604 int qa_indx;
605 };
606
607 struct sdebug_queued_cmd {
608 /* in_use flagged by a bit in queued_in_use_bm[] */
609 struct timer_list *cmnd_timerp;
610 struct tasklet_struct *tletp;
611 struct sdebug_hrtimer *sd_hrtp;
612 struct scsi_cmnd * a_cmnd;
613 };
614 static struct sdebug_queued_cmd queued_arr[SCSI_DEBUG_CANQUEUE];
615 static unsigned long queued_in_use_bm[SCSI_DEBUG_CANQUEUE_WORDS];
616
617
618 static unsigned char * fake_storep; /* ramdisk storage */
619 static struct sd_dif_tuple *dif_storep; /* protection info */
620 static void *map_storep; /* provisioning map */
621
622 static unsigned long map_size;
623 static int num_aborts;
624 static int num_dev_resets;
625 static int num_target_resets;
626 static int num_bus_resets;
627 static int num_host_resets;
628 static int dix_writes;
629 static int dix_reads;
630 static int dif_errors;
631
632 static DEFINE_SPINLOCK(queued_arr_lock);
633 static DEFINE_RWLOCK(atomic_rw);
634
635 static char sdebug_proc_name[] = MY_NAME;
636 static const char *my_name = MY_NAME;
637
638 static struct bus_type pseudo_lld_bus;
639
640 static struct device_driver sdebug_driverfs_driver = {
641 .name = sdebug_proc_name,
642 .bus = &pseudo_lld_bus,
643 };
644
645 static const int check_condition_result =
646 (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
647
648 static const int illegal_condition_result =
649 (DRIVER_SENSE << 24) | (DID_ABORT << 16) | SAM_STAT_CHECK_CONDITION;
650
651 static const int device_qfull_result =
652 (DID_OK << 16) | (COMMAND_COMPLETE << 8) | SAM_STAT_TASK_SET_FULL;
653
654 static unsigned char caching_pg[] = {0x8, 18, 0x14, 0, 0xff, 0xff, 0, 0,
655 0xff, 0xff, 0xff, 0xff, 0x80, 0x14, 0, 0,
656 0, 0, 0, 0};
657 static unsigned char ctrl_m_pg[] = {0xa, 10, 2, 0, 0, 0, 0, 0,
658 0, 0, 0x2, 0x4b};
659 static unsigned char iec_m_pg[] = {0x1c, 0xa, 0x08, 0, 0, 0, 0, 0,
660 0, 0, 0x0, 0x0};
661
662 static void *fake_store(unsigned long long lba)
663 {
664 lba = do_div(lba, sdebug_store_sectors);
665
666 return fake_storep + lba * scsi_debug_sector_size;
667 }
668
669 static struct sd_dif_tuple *dif_store(sector_t sector)
670 {
671 sector = do_div(sector, sdebug_store_sectors);
672
673 return dif_storep + sector;
674 }
675
676 static int sdebug_add_adapter(void);
677 static void sdebug_remove_adapter(void);
678
679 static void sdebug_max_tgts_luns(void)
680 {
681 struct sdebug_host_info *sdbg_host;
682 struct Scsi_Host *hpnt;
683
684 spin_lock(&sdebug_host_list_lock);
685 list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) {
686 hpnt = sdbg_host->shost;
687 if ((hpnt->this_id >= 0) &&
688 (scsi_debug_num_tgts > hpnt->this_id))
689 hpnt->max_id = scsi_debug_num_tgts + 1;
690 else
691 hpnt->max_id = scsi_debug_num_tgts;
692 /* scsi_debug_max_luns; */
693 hpnt->max_lun = SAM2_WLUN_REPORT_LUNS;
694 }
695 spin_unlock(&sdebug_host_list_lock);
696 }
697
698 enum sdeb_cmd_data {SDEB_IN_DATA = 0, SDEB_IN_CDB = 1};
699
700 /* Set in_bit to -1 to indicate no bit position of invalid field */
701 static void
702 mk_sense_invalid_fld(struct scsi_cmnd *scp, enum sdeb_cmd_data c_d,
703 int in_byte, int in_bit)
704 {
705 unsigned char *sbuff;
706 u8 sks[4];
707 int sl, asc;
708
709 sbuff = scp->sense_buffer;
710 if (!sbuff) {
711 sdev_printk(KERN_ERR, scp->device,
712 "%s: sense_buffer is NULL\n", __func__);
713 return;
714 }
715 asc = c_d ? INVALID_FIELD_IN_CDB : INVALID_FIELD_IN_PARAM_LIST;
716 memset(sbuff, 0, SCSI_SENSE_BUFFERSIZE);
717 scsi_build_sense_buffer(scsi_debug_dsense, sbuff, ILLEGAL_REQUEST,
718 asc, 0);
719 memset(sks, 0, sizeof(sks));
720 sks[0] = 0x80;
721 if (c_d)
722 sks[0] |= 0x40;
723 if (in_bit >= 0) {
724 sks[0] |= 0x8;
725 sks[0] |= 0x7 & in_bit;
726 }
727 put_unaligned_be16(in_byte, sks + 1);
728 if (scsi_debug_dsense) {
729 sl = sbuff[7] + 8;
730 sbuff[7] = sl;
731 sbuff[sl] = 0x2;
732 sbuff[sl + 1] = 0x6;
733 memcpy(sbuff + sl + 4, sks, 3);
734 } else
735 memcpy(sbuff + 15, sks, 3);
736 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
737 sdev_printk(KERN_INFO, scp->device, "%s: [sense_key,asc,ascq"
738 "]: [0x5,0x%x,0x0] %c byte=%d, bit=%d\n",
739 my_name, asc, c_d ? 'C' : 'D', in_byte, in_bit);
740 }
741
742 static void mk_sense_buffer(struct scsi_cmnd *scp, int key, int asc, int asq)
743 {
744 unsigned char *sbuff;
745
746 sbuff = scp->sense_buffer;
747 if (!sbuff) {
748 sdev_printk(KERN_ERR, scp->device,
749 "%s: sense_buffer is NULL\n", __func__);
750 return;
751 }
752 memset(sbuff, 0, SCSI_SENSE_BUFFERSIZE);
753
754 scsi_build_sense_buffer(scsi_debug_dsense, sbuff, key, asc, asq);
755
756 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
757 sdev_printk(KERN_INFO, scp->device,
758 "%s: [sense_key,asc,ascq]: [0x%x,0x%x,0x%x]\n",
759 my_name, key, asc, asq);
760 }
761
762 static void
763 mk_sense_invalid_opcode(struct scsi_cmnd *scp)
764 {
765 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_OPCODE, 0);
766 }
767
768 static int scsi_debug_ioctl(struct scsi_device *dev, int cmd, void __user *arg)
769 {
770 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) {
771 if (0x1261 == cmd)
772 sdev_printk(KERN_INFO, dev,
773 "%s: BLKFLSBUF [0x1261]\n", __func__);
774 else if (0x5331 == cmd)
775 sdev_printk(KERN_INFO, dev,
776 "%s: CDROM_GET_CAPABILITY [0x5331]\n",
777 __func__);
778 else
779 sdev_printk(KERN_INFO, dev, "%s: cmd=0x%x\n",
780 __func__, cmd);
781 }
782 return -EINVAL;
783 /* return -ENOTTY; // correct return but upsets fdisk */
784 }
785
786 static int check_readiness(struct scsi_cmnd *SCpnt, int uas_only,
787 struct sdebug_dev_info * devip)
788 {
789 int k;
790 bool debug = !!(SCSI_DEBUG_OPT_NOISE & scsi_debug_opts);
791
792 k = find_first_bit(devip->uas_bm, SDEBUG_NUM_UAS);
793 if (k != SDEBUG_NUM_UAS) {
794 const char *cp = NULL;
795
796 switch (k) {
797 case SDEBUG_UA_POR:
798 mk_sense_buffer(SCpnt, UNIT_ATTENTION,
799 UA_RESET_ASC, POWER_ON_RESET_ASCQ);
800 if (debug)
801 cp = "power on reset";
802 break;
803 case SDEBUG_UA_BUS_RESET:
804 mk_sense_buffer(SCpnt, UNIT_ATTENTION,
805 UA_RESET_ASC, BUS_RESET_ASCQ);
806 if (debug)
807 cp = "bus reset";
808 break;
809 case SDEBUG_UA_MODE_CHANGED:
810 mk_sense_buffer(SCpnt, UNIT_ATTENTION,
811 UA_CHANGED_ASC, MODE_CHANGED_ASCQ);
812 if (debug)
813 cp = "mode parameters changed";
814 break;
815 case SDEBUG_UA_CAPACITY_CHANGED:
816 mk_sense_buffer(SCpnt, UNIT_ATTENTION,
817 UA_CHANGED_ASC, CAPACITY_CHANGED_ASCQ);
818 if (debug)
819 cp = "capacity data changed";
820 default:
821 pr_warn("%s: unexpected unit attention code=%d\n",
822 __func__, k);
823 if (debug)
824 cp = "unknown";
825 break;
826 }
827 clear_bit(k, devip->uas_bm);
828 if (debug)
829 sdev_printk(KERN_INFO, SCpnt->device,
830 "%s reports: Unit attention: %s\n",
831 my_name, cp);
832 return check_condition_result;
833 }
834 if ((UAS_TUR == uas_only) && devip->stopped) {
835 mk_sense_buffer(SCpnt, NOT_READY, LOGICAL_UNIT_NOT_READY,
836 0x2);
837 if (debug)
838 sdev_printk(KERN_INFO, SCpnt->device,
839 "%s reports: Not ready: %s\n", my_name,
840 "initializing command required");
841 return check_condition_result;
842 }
843 return 0;
844 }
845
846 /* Returns 0 if ok else (DID_ERROR << 16). Sets scp->resid . */
847 static int fill_from_dev_buffer(struct scsi_cmnd *scp, unsigned char *arr,
848 int arr_len)
849 {
850 int act_len;
851 struct scsi_data_buffer *sdb = scsi_in(scp);
852
853 if (!sdb->length)
854 return 0;
855 if (!(scsi_bidi_cmnd(scp) || scp->sc_data_direction == DMA_FROM_DEVICE))
856 return (DID_ERROR << 16);
857
858 act_len = sg_copy_from_buffer(sdb->table.sgl, sdb->table.nents,
859 arr, arr_len);
860 sdb->resid = scsi_bufflen(scp) - act_len;
861
862 return 0;
863 }
864
865 /* Returns number of bytes fetched into 'arr' or -1 if error. */
866 static int fetch_to_dev_buffer(struct scsi_cmnd *scp, unsigned char *arr,
867 int arr_len)
868 {
869 if (!scsi_bufflen(scp))
870 return 0;
871 if (!(scsi_bidi_cmnd(scp) || scp->sc_data_direction == DMA_TO_DEVICE))
872 return -1;
873
874 return scsi_sg_copy_to_buffer(scp, arr, arr_len);
875 }
876
877
878 static const char * inq_vendor_id = "Linux ";
879 static const char * inq_product_id = "scsi_debug ";
880 static const char *inq_product_rev = "0184"; /* version less '.' */
881
882 /* Device identification VPD page. Returns number of bytes placed in arr */
883 static int inquiry_evpd_83(unsigned char * arr, int port_group_id,
884 int target_dev_id, int dev_id_num,
885 const char * dev_id_str,
886 int dev_id_str_len)
887 {
888 int num, port_a;
889 char b[32];
890
891 port_a = target_dev_id + 1;
892 /* T10 vendor identifier field format (faked) */
893 arr[0] = 0x2; /* ASCII */
894 arr[1] = 0x1;
895 arr[2] = 0x0;
896 memcpy(&arr[4], inq_vendor_id, 8);
897 memcpy(&arr[12], inq_product_id, 16);
898 memcpy(&arr[28], dev_id_str, dev_id_str_len);
899 num = 8 + 16 + dev_id_str_len;
900 arr[3] = num;
901 num += 4;
902 if (dev_id_num >= 0) {
903 /* NAA-5, Logical unit identifier (binary) */
904 arr[num++] = 0x1; /* binary (not necessarily sas) */
905 arr[num++] = 0x3; /* PIV=0, lu, naa */
906 arr[num++] = 0x0;
907 arr[num++] = 0x8;
908 arr[num++] = 0x53; /* naa-5 ieee company id=0x333333 (fake) */
909 arr[num++] = 0x33;
910 arr[num++] = 0x33;
911 arr[num++] = 0x30;
912 arr[num++] = (dev_id_num >> 24);
913 arr[num++] = (dev_id_num >> 16) & 0xff;
914 arr[num++] = (dev_id_num >> 8) & 0xff;
915 arr[num++] = dev_id_num & 0xff;
916 /* Target relative port number */
917 arr[num++] = 0x61; /* proto=sas, binary */
918 arr[num++] = 0x94; /* PIV=1, target port, rel port */
919 arr[num++] = 0x0; /* reserved */
920 arr[num++] = 0x4; /* length */
921 arr[num++] = 0x0; /* reserved */
922 arr[num++] = 0x0; /* reserved */
923 arr[num++] = 0x0;
924 arr[num++] = 0x1; /* relative port A */
925 }
926 /* NAA-5, Target port identifier */
927 arr[num++] = 0x61; /* proto=sas, binary */
928 arr[num++] = 0x93; /* piv=1, target port, naa */
929 arr[num++] = 0x0;
930 arr[num++] = 0x8;
931 arr[num++] = 0x52; /* naa-5, company id=0x222222 (fake) */
932 arr[num++] = 0x22;
933 arr[num++] = 0x22;
934 arr[num++] = 0x20;
935 arr[num++] = (port_a >> 24);
936 arr[num++] = (port_a >> 16) & 0xff;
937 arr[num++] = (port_a >> 8) & 0xff;
938 arr[num++] = port_a & 0xff;
939 /* NAA-5, Target port group identifier */
940 arr[num++] = 0x61; /* proto=sas, binary */
941 arr[num++] = 0x95; /* piv=1, target port group id */
942 arr[num++] = 0x0;
943 arr[num++] = 0x4;
944 arr[num++] = 0;
945 arr[num++] = 0;
946 arr[num++] = (port_group_id >> 8) & 0xff;
947 arr[num++] = port_group_id & 0xff;
948 /* NAA-5, Target device identifier */
949 arr[num++] = 0x61; /* proto=sas, binary */
950 arr[num++] = 0xa3; /* piv=1, target device, naa */
951 arr[num++] = 0x0;
952 arr[num++] = 0x8;
953 arr[num++] = 0x52; /* naa-5, company id=0x222222 (fake) */
954 arr[num++] = 0x22;
955 arr[num++] = 0x22;
956 arr[num++] = 0x20;
957 arr[num++] = (target_dev_id >> 24);
958 arr[num++] = (target_dev_id >> 16) & 0xff;
959 arr[num++] = (target_dev_id >> 8) & 0xff;
960 arr[num++] = target_dev_id & 0xff;
961 /* SCSI name string: Target device identifier */
962 arr[num++] = 0x63; /* proto=sas, UTF-8 */
963 arr[num++] = 0xa8; /* piv=1, target device, SCSI name string */
964 arr[num++] = 0x0;
965 arr[num++] = 24;
966 memcpy(arr + num, "naa.52222220", 12);
967 num += 12;
968 snprintf(b, sizeof(b), "%08X", target_dev_id);
969 memcpy(arr + num, b, 8);
970 num += 8;
971 memset(arr + num, 0, 4);
972 num += 4;
973 return num;
974 }
975
976
977 static unsigned char vpd84_data[] = {
978 /* from 4th byte */ 0x22,0x22,0x22,0x0,0xbb,0x0,
979 0x22,0x22,0x22,0x0,0xbb,0x1,
980 0x22,0x22,0x22,0x0,0xbb,0x2,
981 };
982
983 /* Software interface identification VPD page */
984 static int inquiry_evpd_84(unsigned char * arr)
985 {
986 memcpy(arr, vpd84_data, sizeof(vpd84_data));
987 return sizeof(vpd84_data);
988 }
989
990 /* Management network addresses VPD page */
991 static int inquiry_evpd_85(unsigned char * arr)
992 {
993 int num = 0;
994 const char * na1 = "https://www.kernel.org/config";
995 const char * na2 = "http://www.kernel.org/log";
996 int plen, olen;
997
998 arr[num++] = 0x1; /* lu, storage config */
999 arr[num++] = 0x0; /* reserved */
1000 arr[num++] = 0x0;
1001 olen = strlen(na1);
1002 plen = olen + 1;
1003 if (plen % 4)
1004 plen = ((plen / 4) + 1) * 4;
1005 arr[num++] = plen; /* length, null termianted, padded */
1006 memcpy(arr + num, na1, olen);
1007 memset(arr + num + olen, 0, plen - olen);
1008 num += plen;
1009
1010 arr[num++] = 0x4; /* lu, logging */
1011 arr[num++] = 0x0; /* reserved */
1012 arr[num++] = 0x0;
1013 olen = strlen(na2);
1014 plen = olen + 1;
1015 if (plen % 4)
1016 plen = ((plen / 4) + 1) * 4;
1017 arr[num++] = plen; /* length, null terminated, padded */
1018 memcpy(arr + num, na2, olen);
1019 memset(arr + num + olen, 0, plen - olen);
1020 num += plen;
1021
1022 return num;
1023 }
1024
1025 /* SCSI ports VPD page */
1026 static int inquiry_evpd_88(unsigned char * arr, int target_dev_id)
1027 {
1028 int num = 0;
1029 int port_a, port_b;
1030
1031 port_a = target_dev_id + 1;
1032 port_b = port_a + 1;
1033 arr[num++] = 0x0; /* reserved */
1034 arr[num++] = 0x0; /* reserved */
1035 arr[num++] = 0x0;
1036 arr[num++] = 0x1; /* relative port 1 (primary) */
1037 memset(arr + num, 0, 6);
1038 num += 6;
1039 arr[num++] = 0x0;
1040 arr[num++] = 12; /* length tp descriptor */
1041 /* naa-5 target port identifier (A) */
1042 arr[num++] = 0x61; /* proto=sas, binary */
1043 arr[num++] = 0x93; /* PIV=1, target port, NAA */
1044 arr[num++] = 0x0; /* reserved */
1045 arr[num++] = 0x8; /* length */
1046 arr[num++] = 0x52; /* NAA-5, company_id=0x222222 (fake) */
1047 arr[num++] = 0x22;
1048 arr[num++] = 0x22;
1049 arr[num++] = 0x20;
1050 arr[num++] = (port_a >> 24);
1051 arr[num++] = (port_a >> 16) & 0xff;
1052 arr[num++] = (port_a >> 8) & 0xff;
1053 arr[num++] = port_a & 0xff;
1054
1055 arr[num++] = 0x0; /* reserved */
1056 arr[num++] = 0x0; /* reserved */
1057 arr[num++] = 0x0;
1058 arr[num++] = 0x2; /* relative port 2 (secondary) */
1059 memset(arr + num, 0, 6);
1060 num += 6;
1061 arr[num++] = 0x0;
1062 arr[num++] = 12; /* length tp descriptor */
1063 /* naa-5 target port identifier (B) */
1064 arr[num++] = 0x61; /* proto=sas, binary */
1065 arr[num++] = 0x93; /* PIV=1, target port, NAA */
1066 arr[num++] = 0x0; /* reserved */
1067 arr[num++] = 0x8; /* length */
1068 arr[num++] = 0x52; /* NAA-5, company_id=0x222222 (fake) */
1069 arr[num++] = 0x22;
1070 arr[num++] = 0x22;
1071 arr[num++] = 0x20;
1072 arr[num++] = (port_b >> 24);
1073 arr[num++] = (port_b >> 16) & 0xff;
1074 arr[num++] = (port_b >> 8) & 0xff;
1075 arr[num++] = port_b & 0xff;
1076
1077 return num;
1078 }
1079
1080
1081 static unsigned char vpd89_data[] = {
1082 /* from 4th byte */ 0,0,0,0,
1083 'l','i','n','u','x',' ',' ',' ',
1084 'S','A','T',' ','s','c','s','i','_','d','e','b','u','g',' ',' ',
1085 '1','2','3','4',
1086 0x34,0,0,0,1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,
1087 0xec,0,0,0,
1088 0x5a,0xc,0xff,0x3f,0x37,0xc8,0x10,0,0,0,0,0,0x3f,0,0,0,
1089 0,0,0,0,0x58,0x58,0x58,0x58,0x58,0x58,0x58,0x58,0x20,0x20,0x20,0x20,
1090 0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0,0,0,0x40,0x4,0,0x2e,0x33,
1091 0x38,0x31,0x20,0x20,0x20,0x20,0x54,0x53,0x38,0x33,0x30,0x30,0x33,0x31,
1092 0x53,0x41,
1093 0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,
1094 0x20,0x20,
1095 0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,
1096 0x10,0x80,
1097 0,0,0,0x2f,0,0,0,0x2,0,0x2,0x7,0,0xff,0xff,0x1,0,
1098 0x3f,0,0xc1,0xff,0x3e,0,0x10,0x1,0xb0,0xf8,0x50,0x9,0,0,0x7,0,
1099 0x3,0,0x78,0,0x78,0,0xf0,0,0x78,0,0,0,0,0,0,0,
1100 0,0,0,0,0,0,0,0,0x2,0,0,0,0,0,0,0,
1101 0x7e,0,0x1b,0,0x6b,0x34,0x1,0x7d,0x3,0x40,0x69,0x34,0x1,0x3c,0x3,0x40,
1102 0x7f,0x40,0,0,0,0,0xfe,0xfe,0,0,0,0,0,0xfe,0,0,
1103 0,0,0,0,0,0,0,0,0xb0,0xf8,0x50,0x9,0,0,0,0,
1104 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1105 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1106 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1107 0x1,0,0xb0,0xf8,0x50,0x9,0xb0,0xf8,0x50,0x9,0x20,0x20,0x2,0,0xb6,0x42,
1108 0,0x80,0x8a,0,0x6,0x3c,0xa,0x3c,0xff,0xff,0xc6,0x7,0,0x1,0,0x8,
1109 0xf0,0xf,0,0x10,0x2,0,0x30,0,0,0,0,0,0,0,0x6,0xfe,
1110 0,0,0x2,0,0x50,0,0x8a,0,0x4f,0x95,0,0,0x21,0,0xb,0,
1111 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1112 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1113 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1114 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1115 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1116 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1117 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1118 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1119 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1120 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1121 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1122 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0xa5,0x51,
1123 };
1124
1125 /* ATA Information VPD page */
1126 static int inquiry_evpd_89(unsigned char * arr)
1127 {
1128 memcpy(arr, vpd89_data, sizeof(vpd89_data));
1129 return sizeof(vpd89_data);
1130 }
1131
1132
1133 static unsigned char vpdb0_data[] = {
1134 /* from 4th byte */ 0,0,0,4, 0,0,0x4,0, 0,0,0,64,
1135 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1136 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1137 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1138 };
1139
1140 /* Block limits VPD page (SBC-3) */
1141 static int inquiry_evpd_b0(unsigned char * arr)
1142 {
1143 unsigned int gran;
1144
1145 memcpy(arr, vpdb0_data, sizeof(vpdb0_data));
1146
1147 /* Optimal transfer length granularity */
1148 gran = 1 << scsi_debug_physblk_exp;
1149 arr[2] = (gran >> 8) & 0xff;
1150 arr[3] = gran & 0xff;
1151
1152 /* Maximum Transfer Length */
1153 if (sdebug_store_sectors > 0x400) {
1154 arr[4] = (sdebug_store_sectors >> 24) & 0xff;
1155 arr[5] = (sdebug_store_sectors >> 16) & 0xff;
1156 arr[6] = (sdebug_store_sectors >> 8) & 0xff;
1157 arr[7] = sdebug_store_sectors & 0xff;
1158 }
1159
1160 /* Optimal Transfer Length */
1161 put_unaligned_be32(scsi_debug_opt_blks, &arr[8]);
1162
1163 if (scsi_debug_lbpu) {
1164 /* Maximum Unmap LBA Count */
1165 put_unaligned_be32(scsi_debug_unmap_max_blocks, &arr[16]);
1166
1167 /* Maximum Unmap Block Descriptor Count */
1168 put_unaligned_be32(scsi_debug_unmap_max_desc, &arr[20]);
1169 }
1170
1171 /* Unmap Granularity Alignment */
1172 if (scsi_debug_unmap_alignment) {
1173 put_unaligned_be32(scsi_debug_unmap_alignment, &arr[28]);
1174 arr[28] |= 0x80; /* UGAVALID */
1175 }
1176
1177 /* Optimal Unmap Granularity */
1178 put_unaligned_be32(scsi_debug_unmap_granularity, &arr[24]);
1179
1180 /* Maximum WRITE SAME Length */
1181 put_unaligned_be64(scsi_debug_write_same_length, &arr[32]);
1182
1183 return 0x3c; /* Mandatory page length for Logical Block Provisioning */
1184
1185 return sizeof(vpdb0_data);
1186 }
1187
1188 /* Block device characteristics VPD page (SBC-3) */
1189 static int inquiry_evpd_b1(unsigned char *arr)
1190 {
1191 memset(arr, 0, 0x3c);
1192 arr[0] = 0;
1193 arr[1] = 1; /* non rotating medium (e.g. solid state) */
1194 arr[2] = 0;
1195 arr[3] = 5; /* less than 1.8" */
1196
1197 return 0x3c;
1198 }
1199
1200 /* Logical block provisioning VPD page (SBC-3) */
1201 static int inquiry_evpd_b2(unsigned char *arr)
1202 {
1203 memset(arr, 0, 0x4);
1204 arr[0] = 0; /* threshold exponent */
1205
1206 if (scsi_debug_lbpu)
1207 arr[1] = 1 << 7;
1208
1209 if (scsi_debug_lbpws)
1210 arr[1] |= 1 << 6;
1211
1212 if (scsi_debug_lbpws10)
1213 arr[1] |= 1 << 5;
1214
1215 if (scsi_debug_lbprz)
1216 arr[1] |= 1 << 2;
1217
1218 return 0x4;
1219 }
1220
1221 #define SDEBUG_LONG_INQ_SZ 96
1222 #define SDEBUG_MAX_INQ_ARR_SZ 584
1223
1224 static int resp_inquiry(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
1225 {
1226 unsigned char pq_pdt;
1227 unsigned char * arr;
1228 unsigned char *cmd = scp->cmnd;
1229 int alloc_len, n, ret;
1230 bool have_wlun;
1231
1232 alloc_len = (cmd[3] << 8) + cmd[4];
1233 arr = kzalloc(SDEBUG_MAX_INQ_ARR_SZ, GFP_ATOMIC);
1234 if (! arr)
1235 return DID_REQUEUE << 16;
1236 have_wlun = (scp->device->lun == SAM2_WLUN_REPORT_LUNS);
1237 if (have_wlun)
1238 pq_pdt = 0x1e; /* present, wlun */
1239 else if (scsi_debug_no_lun_0 && (0 == devip->lun))
1240 pq_pdt = 0x7f; /* not present, no device type */
1241 else
1242 pq_pdt = (scsi_debug_ptype & 0x1f);
1243 arr[0] = pq_pdt;
1244 if (0x2 & cmd[1]) { /* CMDDT bit set */
1245 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 1);
1246 kfree(arr);
1247 return check_condition_result;
1248 } else if (0x1 & cmd[1]) { /* EVPD bit set */
1249 int lu_id_num, port_group_id, target_dev_id, len;
1250 char lu_id_str[6];
1251 int host_no = devip->sdbg_host->shost->host_no;
1252
1253 port_group_id = (((host_no + 1) & 0x7f) << 8) +
1254 (devip->channel & 0x7f);
1255 if (0 == scsi_debug_vpd_use_hostno)
1256 host_no = 0;
1257 lu_id_num = have_wlun ? -1 : (((host_no + 1) * 2000) +
1258 (devip->target * 1000) + devip->lun);
1259 target_dev_id = ((host_no + 1) * 2000) +
1260 (devip->target * 1000) - 3;
1261 len = scnprintf(lu_id_str, 6, "%d", lu_id_num);
1262 if (0 == cmd[2]) { /* supported vital product data pages */
1263 arr[1] = cmd[2]; /*sanity */
1264 n = 4;
1265 arr[n++] = 0x0; /* this page */
1266 arr[n++] = 0x80; /* unit serial number */
1267 arr[n++] = 0x83; /* device identification */
1268 arr[n++] = 0x84; /* software interface ident. */
1269 arr[n++] = 0x85; /* management network addresses */
1270 arr[n++] = 0x86; /* extended inquiry */
1271 arr[n++] = 0x87; /* mode page policy */
1272 arr[n++] = 0x88; /* SCSI ports */
1273 arr[n++] = 0x89; /* ATA information */
1274 arr[n++] = 0xb0; /* Block limits (SBC) */
1275 arr[n++] = 0xb1; /* Block characteristics (SBC) */
1276 if (scsi_debug_lbp()) /* Logical Block Prov. (SBC) */
1277 arr[n++] = 0xb2;
1278 arr[3] = n - 4; /* number of supported VPD pages */
1279 } else if (0x80 == cmd[2]) { /* unit serial number */
1280 arr[1] = cmd[2]; /*sanity */
1281 arr[3] = len;
1282 memcpy(&arr[4], lu_id_str, len);
1283 } else if (0x83 == cmd[2]) { /* device identification */
1284 arr[1] = cmd[2]; /*sanity */
1285 arr[3] = inquiry_evpd_83(&arr[4], port_group_id,
1286 target_dev_id, lu_id_num,
1287 lu_id_str, len);
1288 } else if (0x84 == cmd[2]) { /* Software interface ident. */
1289 arr[1] = cmd[2]; /*sanity */
1290 arr[3] = inquiry_evpd_84(&arr[4]);
1291 } else if (0x85 == cmd[2]) { /* Management network addresses */
1292 arr[1] = cmd[2]; /*sanity */
1293 arr[3] = inquiry_evpd_85(&arr[4]);
1294 } else if (0x86 == cmd[2]) { /* extended inquiry */
1295 arr[1] = cmd[2]; /*sanity */
1296 arr[3] = 0x3c; /* number of following entries */
1297 if (scsi_debug_dif == SD_DIF_TYPE3_PROTECTION)
1298 arr[4] = 0x4; /* SPT: GRD_CHK:1 */
1299 else if (scsi_debug_dif)
1300 arr[4] = 0x5; /* SPT: GRD_CHK:1, REF_CHK:1 */
1301 else
1302 arr[4] = 0x0; /* no protection stuff */
1303 arr[5] = 0x7; /* head of q, ordered + simple q's */
1304 } else if (0x87 == cmd[2]) { /* mode page policy */
1305 arr[1] = cmd[2]; /*sanity */
1306 arr[3] = 0x8; /* number of following entries */
1307 arr[4] = 0x2; /* disconnect-reconnect mp */
1308 arr[6] = 0x80; /* mlus, shared */
1309 arr[8] = 0x18; /* protocol specific lu */
1310 arr[10] = 0x82; /* mlus, per initiator port */
1311 } else if (0x88 == cmd[2]) { /* SCSI Ports */
1312 arr[1] = cmd[2]; /*sanity */
1313 arr[3] = inquiry_evpd_88(&arr[4], target_dev_id);
1314 } else if (0x89 == cmd[2]) { /* ATA information */
1315 arr[1] = cmd[2]; /*sanity */
1316 n = inquiry_evpd_89(&arr[4]);
1317 arr[2] = (n >> 8);
1318 arr[3] = (n & 0xff);
1319 } else if (0xb0 == cmd[2]) { /* Block limits (SBC) */
1320 arr[1] = cmd[2]; /*sanity */
1321 arr[3] = inquiry_evpd_b0(&arr[4]);
1322 } else if (0xb1 == cmd[2]) { /* Block characteristics (SBC) */
1323 arr[1] = cmd[2]; /*sanity */
1324 arr[3] = inquiry_evpd_b1(&arr[4]);
1325 } else if (0xb2 == cmd[2]) { /* Logical Block Prov. (SBC) */
1326 arr[1] = cmd[2]; /*sanity */
1327 arr[3] = inquiry_evpd_b2(&arr[4]);
1328 } else {
1329 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, -1);
1330 kfree(arr);
1331 return check_condition_result;
1332 }
1333 len = min(((arr[2] << 8) + arr[3]) + 4, alloc_len);
1334 ret = fill_from_dev_buffer(scp, arr,
1335 min(len, SDEBUG_MAX_INQ_ARR_SZ));
1336 kfree(arr);
1337 return ret;
1338 }
1339 /* drops through here for a standard inquiry */
1340 arr[1] = scsi_debug_removable ? 0x80 : 0; /* Removable disk */
1341 arr[2] = scsi_debug_scsi_level;
1342 arr[3] = 2; /* response_data_format==2 */
1343 arr[4] = SDEBUG_LONG_INQ_SZ - 5;
1344 arr[5] = scsi_debug_dif ? 1 : 0; /* PROTECT bit */
1345 if (0 == scsi_debug_vpd_use_hostno)
1346 arr[5] = 0x10; /* claim: implicit TGPS */
1347 arr[6] = 0x10; /* claim: MultiP */
1348 /* arr[6] |= 0x40; ... claim: EncServ (enclosure services) */
1349 arr[7] = 0xa; /* claim: LINKED + CMDQUE */
1350 memcpy(&arr[8], inq_vendor_id, 8);
1351 memcpy(&arr[16], inq_product_id, 16);
1352 memcpy(&arr[32], inq_product_rev, 4);
1353 /* version descriptors (2 bytes each) follow */
1354 arr[58] = 0x0; arr[59] = 0xa2; /* SAM-5 rev 4 */
1355 arr[60] = 0x4; arr[61] = 0x68; /* SPC-4 rev 37 */
1356 n = 62;
1357 if (scsi_debug_ptype == 0) {
1358 arr[n++] = 0x4; arr[n++] = 0xc5; /* SBC-4 rev 36 */
1359 } else if (scsi_debug_ptype == 1) {
1360 arr[n++] = 0x5; arr[n++] = 0x25; /* SSC-4 rev 3 */
1361 }
1362 arr[n++] = 0x20; arr[n++] = 0xe6; /* SPL-3 rev 7 */
1363 ret = fill_from_dev_buffer(scp, arr,
1364 min(alloc_len, SDEBUG_LONG_INQ_SZ));
1365 kfree(arr);
1366 return ret;
1367 }
1368
1369 static int resp_requests(struct scsi_cmnd * scp,
1370 struct sdebug_dev_info * devip)
1371 {
1372 unsigned char * sbuff;
1373 unsigned char *cmd = scp->cmnd;
1374 unsigned char arr[SCSI_SENSE_BUFFERSIZE];
1375 bool dsense, want_dsense;
1376 int len = 18;
1377
1378 memset(arr, 0, sizeof(arr));
1379 dsense = !!(cmd[1] & 1);
1380 want_dsense = dsense || scsi_debug_dsense;
1381 sbuff = scp->sense_buffer;
1382 if ((iec_m_pg[2] & 0x4) && (6 == (iec_m_pg[3] & 0xf))) {
1383 if (dsense) {
1384 arr[0] = 0x72;
1385 arr[1] = 0x0; /* NO_SENSE in sense_key */
1386 arr[2] = THRESHOLD_EXCEEDED;
1387 arr[3] = 0xff; /* TEST set and MRIE==6 */
1388 len = 8;
1389 } else {
1390 arr[0] = 0x70;
1391 arr[2] = 0x0; /* NO_SENSE in sense_key */
1392 arr[7] = 0xa; /* 18 byte sense buffer */
1393 arr[12] = THRESHOLD_EXCEEDED;
1394 arr[13] = 0xff; /* TEST set and MRIE==6 */
1395 }
1396 } else {
1397 memcpy(arr, sbuff, SCSI_SENSE_BUFFERSIZE);
1398 if (arr[0] >= 0x70 && dsense == scsi_debug_dsense)
1399 ; /* have sense and formats match */
1400 else if (arr[0] <= 0x70) {
1401 if (dsense) {
1402 memset(arr, 0, 8);
1403 arr[0] = 0x72;
1404 len = 8;
1405 } else {
1406 memset(arr, 0, 18);
1407 arr[0] = 0x70;
1408 arr[7] = 0xa;
1409 }
1410 } else if (dsense) {
1411 memset(arr, 0, 8);
1412 arr[0] = 0x72;
1413 arr[1] = sbuff[2]; /* sense key */
1414 arr[2] = sbuff[12]; /* asc */
1415 arr[3] = sbuff[13]; /* ascq */
1416 len = 8;
1417 } else {
1418 memset(arr, 0, 18);
1419 arr[0] = 0x70;
1420 arr[2] = sbuff[1];
1421 arr[7] = 0xa;
1422 arr[12] = sbuff[1];
1423 arr[13] = sbuff[3];
1424 }
1425
1426 }
1427 mk_sense_buffer(scp, 0, NO_ADDITIONAL_SENSE, 0);
1428 return fill_from_dev_buffer(scp, arr, len);
1429 }
1430
1431 static int resp_start_stop(struct scsi_cmnd * scp,
1432 struct sdebug_dev_info * devip)
1433 {
1434 unsigned char *cmd = scp->cmnd;
1435 int power_cond, start;
1436
1437 power_cond = (cmd[4] & 0xf0) >> 4;
1438 if (power_cond) {
1439 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 4, 7);
1440 return check_condition_result;
1441 }
1442 start = cmd[4] & 1;
1443 if (start == devip->stopped)
1444 devip->stopped = !start;
1445 return 0;
1446 }
1447
1448 static sector_t get_sdebug_capacity(void)
1449 {
1450 if (scsi_debug_virtual_gb > 0)
1451 return (sector_t)scsi_debug_virtual_gb *
1452 (1073741824 / scsi_debug_sector_size);
1453 else
1454 return sdebug_store_sectors;
1455 }
1456
1457 #define SDEBUG_READCAP_ARR_SZ 8
1458 static int resp_readcap(struct scsi_cmnd * scp,
1459 struct sdebug_dev_info * devip)
1460 {
1461 unsigned char arr[SDEBUG_READCAP_ARR_SZ];
1462 unsigned int capac;
1463
1464 /* following just in case virtual_gb changed */
1465 sdebug_capacity = get_sdebug_capacity();
1466 memset(arr, 0, SDEBUG_READCAP_ARR_SZ);
1467 if (sdebug_capacity < 0xffffffff) {
1468 capac = (unsigned int)sdebug_capacity - 1;
1469 arr[0] = (capac >> 24);
1470 arr[1] = (capac >> 16) & 0xff;
1471 arr[2] = (capac >> 8) & 0xff;
1472 arr[3] = capac & 0xff;
1473 } else {
1474 arr[0] = 0xff;
1475 arr[1] = 0xff;
1476 arr[2] = 0xff;
1477 arr[3] = 0xff;
1478 }
1479 arr[6] = (scsi_debug_sector_size >> 8) & 0xff;
1480 arr[7] = scsi_debug_sector_size & 0xff;
1481 return fill_from_dev_buffer(scp, arr, SDEBUG_READCAP_ARR_SZ);
1482 }
1483
1484 #define SDEBUG_READCAP16_ARR_SZ 32
1485 static int resp_readcap16(struct scsi_cmnd * scp,
1486 struct sdebug_dev_info * devip)
1487 {
1488 unsigned char *cmd = scp->cmnd;
1489 unsigned char arr[SDEBUG_READCAP16_ARR_SZ];
1490 unsigned long long capac;
1491 int k, alloc_len;
1492
1493 alloc_len = ((cmd[10] << 24) + (cmd[11] << 16) + (cmd[12] << 8)
1494 + cmd[13]);
1495 /* following just in case virtual_gb changed */
1496 sdebug_capacity = get_sdebug_capacity();
1497 memset(arr, 0, SDEBUG_READCAP16_ARR_SZ);
1498 capac = sdebug_capacity - 1;
1499 for (k = 0; k < 8; ++k, capac >>= 8)
1500 arr[7 - k] = capac & 0xff;
1501 arr[8] = (scsi_debug_sector_size >> 24) & 0xff;
1502 arr[9] = (scsi_debug_sector_size >> 16) & 0xff;
1503 arr[10] = (scsi_debug_sector_size >> 8) & 0xff;
1504 arr[11] = scsi_debug_sector_size & 0xff;
1505 arr[13] = scsi_debug_physblk_exp & 0xf;
1506 arr[14] = (scsi_debug_lowest_aligned >> 8) & 0x3f;
1507
1508 if (scsi_debug_lbp()) {
1509 arr[14] |= 0x80; /* LBPME */
1510 if (scsi_debug_lbprz)
1511 arr[14] |= 0x40; /* LBPRZ */
1512 }
1513
1514 arr[15] = scsi_debug_lowest_aligned & 0xff;
1515
1516 if (scsi_debug_dif) {
1517 arr[12] = (scsi_debug_dif - 1) << 1; /* P_TYPE */
1518 arr[12] |= 1; /* PROT_EN */
1519 }
1520
1521 return fill_from_dev_buffer(scp, arr,
1522 min(alloc_len, SDEBUG_READCAP16_ARR_SZ));
1523 }
1524
1525 #define SDEBUG_MAX_TGTPGS_ARR_SZ 1412
1526
1527 static int resp_report_tgtpgs(struct scsi_cmnd * scp,
1528 struct sdebug_dev_info * devip)
1529 {
1530 unsigned char *cmd = scp->cmnd;
1531 unsigned char * arr;
1532 int host_no = devip->sdbg_host->shost->host_no;
1533 int n, ret, alen, rlen;
1534 int port_group_a, port_group_b, port_a, port_b;
1535
1536 alen = ((cmd[6] << 24) + (cmd[7] << 16) + (cmd[8] << 8)
1537 + cmd[9]);
1538
1539 arr = kzalloc(SDEBUG_MAX_TGTPGS_ARR_SZ, GFP_ATOMIC);
1540 if (! arr)
1541 return DID_REQUEUE << 16;
1542 /*
1543 * EVPD page 0x88 states we have two ports, one
1544 * real and a fake port with no device connected.
1545 * So we create two port groups with one port each
1546 * and set the group with port B to unavailable.
1547 */
1548 port_a = 0x1; /* relative port A */
1549 port_b = 0x2; /* relative port B */
1550 port_group_a = (((host_no + 1) & 0x7f) << 8) +
1551 (devip->channel & 0x7f);
1552 port_group_b = (((host_no + 1) & 0x7f) << 8) +
1553 (devip->channel & 0x7f) + 0x80;
1554
1555 /*
1556 * The asymmetric access state is cycled according to the host_id.
1557 */
1558 n = 4;
1559 if (0 == scsi_debug_vpd_use_hostno) {
1560 arr[n++] = host_no % 3; /* Asymm access state */
1561 arr[n++] = 0x0F; /* claim: all states are supported */
1562 } else {
1563 arr[n++] = 0x0; /* Active/Optimized path */
1564 arr[n++] = 0x01; /* claim: only support active/optimized paths */
1565 }
1566 arr[n++] = (port_group_a >> 8) & 0xff;
1567 arr[n++] = port_group_a & 0xff;
1568 arr[n++] = 0; /* Reserved */
1569 arr[n++] = 0; /* Status code */
1570 arr[n++] = 0; /* Vendor unique */
1571 arr[n++] = 0x1; /* One port per group */
1572 arr[n++] = 0; /* Reserved */
1573 arr[n++] = 0; /* Reserved */
1574 arr[n++] = (port_a >> 8) & 0xff;
1575 arr[n++] = port_a & 0xff;
1576 arr[n++] = 3; /* Port unavailable */
1577 arr[n++] = 0x08; /* claim: only unavailalbe paths are supported */
1578 arr[n++] = (port_group_b >> 8) & 0xff;
1579 arr[n++] = port_group_b & 0xff;
1580 arr[n++] = 0; /* Reserved */
1581 arr[n++] = 0; /* Status code */
1582 arr[n++] = 0; /* Vendor unique */
1583 arr[n++] = 0x1; /* One port per group */
1584 arr[n++] = 0; /* Reserved */
1585 arr[n++] = 0; /* Reserved */
1586 arr[n++] = (port_b >> 8) & 0xff;
1587 arr[n++] = port_b & 0xff;
1588
1589 rlen = n - 4;
1590 arr[0] = (rlen >> 24) & 0xff;
1591 arr[1] = (rlen >> 16) & 0xff;
1592 arr[2] = (rlen >> 8) & 0xff;
1593 arr[3] = rlen & 0xff;
1594
1595 /*
1596 * Return the smallest value of either
1597 * - The allocated length
1598 * - The constructed command length
1599 * - The maximum array size
1600 */
1601 rlen = min(alen,n);
1602 ret = fill_from_dev_buffer(scp, arr,
1603 min(rlen, SDEBUG_MAX_TGTPGS_ARR_SZ));
1604 kfree(arr);
1605 return ret;
1606 }
1607
1608 static int
1609 resp_rsup_opcodes(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
1610 {
1611 bool rctd;
1612 u8 reporting_opts, req_opcode, sdeb_i, supp;
1613 u16 req_sa, u;
1614 u32 alloc_len, a_len;
1615 int k, offset, len, errsts, count, bump, na;
1616 const struct opcode_info_t *oip;
1617 const struct opcode_info_t *r_oip;
1618 u8 *arr;
1619 u8 *cmd = scp->cmnd;
1620
1621 rctd = !!(cmd[2] & 0x80);
1622 reporting_opts = cmd[2] & 0x7;
1623 req_opcode = cmd[3];
1624 req_sa = get_unaligned_be16(cmd + 4);
1625 alloc_len = get_unaligned_be32(cmd + 6);
1626 if (alloc_len < 4 && alloc_len > 0xffff) {
1627 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 6, -1);
1628 return check_condition_result;
1629 }
1630 if (alloc_len > 8192)
1631 a_len = 8192;
1632 else
1633 a_len = alloc_len;
1634 arr = kzalloc((a_len < 256) ? 320 : a_len + 64, GFP_KERNEL);
1635 if (NULL == arr) {
1636 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
1637 INSUFF_RES_ASCQ);
1638 return check_condition_result;
1639 }
1640 switch (reporting_opts) {
1641 case 0: /* all commands */
1642 /* count number of commands */
1643 for (count = 0, oip = opcode_info_arr;
1644 oip->num_attached != 0xff; ++oip) {
1645 if (F_INV_OP & oip->flags)
1646 continue;
1647 count += (oip->num_attached + 1);
1648 }
1649 bump = rctd ? 20 : 8;
1650 put_unaligned_be32(count * bump, arr);
1651 for (offset = 4, oip = opcode_info_arr;
1652 oip->num_attached != 0xff && offset < a_len; ++oip) {
1653 if (F_INV_OP & oip->flags)
1654 continue;
1655 na = oip->num_attached;
1656 arr[offset] = oip->opcode;
1657 put_unaligned_be16(oip->sa, arr + offset + 2);
1658 if (rctd)
1659 arr[offset + 5] |= 0x2;
1660 if (FF_SA & oip->flags)
1661 arr[offset + 5] |= 0x1;
1662 put_unaligned_be16(oip->len_mask[0], arr + offset + 6);
1663 if (rctd)
1664 put_unaligned_be16(0xa, arr + offset + 8);
1665 r_oip = oip;
1666 for (k = 0, oip = oip->arrp; k < na; ++k, ++oip) {
1667 if (F_INV_OP & oip->flags)
1668 continue;
1669 offset += bump;
1670 arr[offset] = oip->opcode;
1671 put_unaligned_be16(oip->sa, arr + offset + 2);
1672 if (rctd)
1673 arr[offset + 5] |= 0x2;
1674 if (FF_SA & oip->flags)
1675 arr[offset + 5] |= 0x1;
1676 put_unaligned_be16(oip->len_mask[0],
1677 arr + offset + 6);
1678 if (rctd)
1679 put_unaligned_be16(0xa,
1680 arr + offset + 8);
1681 }
1682 oip = r_oip;
1683 offset += bump;
1684 }
1685 break;
1686 case 1: /* one command: opcode only */
1687 case 2: /* one command: opcode plus service action */
1688 case 3: /* one command: if sa==0 then opcode only else opcode+sa */
1689 sdeb_i = opcode_ind_arr[req_opcode];
1690 oip = &opcode_info_arr[sdeb_i];
1691 if (F_INV_OP & oip->flags) {
1692 supp = 1;
1693 offset = 4;
1694 } else {
1695 if (1 == reporting_opts) {
1696 if (FF_SA & oip->flags) {
1697 mk_sense_invalid_fld(scp, SDEB_IN_CDB,
1698 2, 2);
1699 kfree(arr);
1700 return check_condition_result;
1701 }
1702 req_sa = 0;
1703 } else if (2 == reporting_opts &&
1704 0 == (FF_SA & oip->flags)) {
1705 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 4, -1);
1706 kfree(arr); /* point at requested sa */
1707 return check_condition_result;
1708 }
1709 if (0 == (FF_SA & oip->flags) &&
1710 req_opcode == oip->opcode)
1711 supp = 3;
1712 else if (0 == (FF_SA & oip->flags)) {
1713 na = oip->num_attached;
1714 for (k = 0, oip = oip->arrp; k < na;
1715 ++k, ++oip) {
1716 if (req_opcode == oip->opcode)
1717 break;
1718 }
1719 supp = (k >= na) ? 1 : 3;
1720 } else if (req_sa != oip->sa) {
1721 na = oip->num_attached;
1722 for (k = 0, oip = oip->arrp; k < na;
1723 ++k, ++oip) {
1724 if (req_sa == oip->sa)
1725 break;
1726 }
1727 supp = (k >= na) ? 1 : 3;
1728 } else
1729 supp = 3;
1730 if (3 == supp) {
1731 u = oip->len_mask[0];
1732 put_unaligned_be16(u, arr + 2);
1733 arr[4] = oip->opcode;
1734 for (k = 1; k < u; ++k)
1735 arr[4 + k] = (k < 16) ?
1736 oip->len_mask[k] : 0xff;
1737 offset = 4 + u;
1738 } else
1739 offset = 4;
1740 }
1741 arr[1] = (rctd ? 0x80 : 0) | supp;
1742 if (rctd) {
1743 put_unaligned_be16(0xa, arr + offset);
1744 offset += 12;
1745 }
1746 break;
1747 default:
1748 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 2);
1749 kfree(arr);
1750 return check_condition_result;
1751 }
1752 offset = (offset < a_len) ? offset : a_len;
1753 len = (offset < alloc_len) ? offset : alloc_len;
1754 errsts = fill_from_dev_buffer(scp, arr, len);
1755 kfree(arr);
1756 return errsts;
1757 }
1758
1759 static int
1760 resp_rsup_tmfs(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
1761 {
1762 bool repd;
1763 u32 alloc_len, len;
1764 u8 arr[16];
1765 u8 *cmd = scp->cmnd;
1766
1767 memset(arr, 0, sizeof(arr));
1768 repd = !!(cmd[2] & 0x80);
1769 alloc_len = get_unaligned_be32(cmd + 6);
1770 if (alloc_len < 4) {
1771 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 6, -1);
1772 return check_condition_result;
1773 }
1774 arr[0] = 0xc8; /* ATS | ATSS | LURS */
1775 arr[1] = 0x1; /* ITNRS */
1776 if (repd) {
1777 arr[3] = 0xc;
1778 len = 16;
1779 } else
1780 len = 4;
1781
1782 len = (len < alloc_len) ? len : alloc_len;
1783 return fill_from_dev_buffer(scp, arr, len);
1784 }
1785
1786 /* <<Following mode page info copied from ST318451LW>> */
1787
1788 static int resp_err_recov_pg(unsigned char * p, int pcontrol, int target)
1789 { /* Read-Write Error Recovery page for mode_sense */
1790 unsigned char err_recov_pg[] = {0x1, 0xa, 0xc0, 11, 240, 0, 0, 0,
1791 5, 0, 0xff, 0xff};
1792
1793 memcpy(p, err_recov_pg, sizeof(err_recov_pg));
1794 if (1 == pcontrol)
1795 memset(p + 2, 0, sizeof(err_recov_pg) - 2);
1796 return sizeof(err_recov_pg);
1797 }
1798
1799 static int resp_disconnect_pg(unsigned char * p, int pcontrol, int target)
1800 { /* Disconnect-Reconnect page for mode_sense */
1801 unsigned char disconnect_pg[] = {0x2, 0xe, 128, 128, 0, 10, 0, 0,
1802 0, 0, 0, 0, 0, 0, 0, 0};
1803
1804 memcpy(p, disconnect_pg, sizeof(disconnect_pg));
1805 if (1 == pcontrol)
1806 memset(p + 2, 0, sizeof(disconnect_pg) - 2);
1807 return sizeof(disconnect_pg);
1808 }
1809
1810 static int resp_format_pg(unsigned char * p, int pcontrol, int target)
1811 { /* Format device page for mode_sense */
1812 unsigned char format_pg[] = {0x3, 0x16, 0, 0, 0, 0, 0, 0,
1813 0, 0, 0, 0, 0, 0, 0, 0,
1814 0, 0, 0, 0, 0x40, 0, 0, 0};
1815
1816 memcpy(p, format_pg, sizeof(format_pg));
1817 p[10] = (sdebug_sectors_per >> 8) & 0xff;
1818 p[11] = sdebug_sectors_per & 0xff;
1819 p[12] = (scsi_debug_sector_size >> 8) & 0xff;
1820 p[13] = scsi_debug_sector_size & 0xff;
1821 if (scsi_debug_removable)
1822 p[20] |= 0x20; /* should agree with INQUIRY */
1823 if (1 == pcontrol)
1824 memset(p + 2, 0, sizeof(format_pg) - 2);
1825 return sizeof(format_pg);
1826 }
1827
1828 static int resp_caching_pg(unsigned char * p, int pcontrol, int target)
1829 { /* Caching page for mode_sense */
1830 unsigned char ch_caching_pg[] = {/* 0x8, 18, */ 0x4, 0, 0, 0, 0, 0,
1831 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
1832 unsigned char d_caching_pg[] = {0x8, 18, 0x14, 0, 0xff, 0xff, 0, 0,
1833 0xff, 0xff, 0xff, 0xff, 0x80, 0x14, 0, 0, 0, 0, 0, 0};
1834
1835 if (SCSI_DEBUG_OPT_N_WCE & scsi_debug_opts)
1836 caching_pg[2] &= ~0x4; /* set WCE=0 (default WCE=1) */
1837 memcpy(p, caching_pg, sizeof(caching_pg));
1838 if (1 == pcontrol)
1839 memcpy(p + 2, ch_caching_pg, sizeof(ch_caching_pg));
1840 else if (2 == pcontrol)
1841 memcpy(p, d_caching_pg, sizeof(d_caching_pg));
1842 return sizeof(caching_pg);
1843 }
1844
1845 static int resp_ctrl_m_pg(unsigned char * p, int pcontrol, int target)
1846 { /* Control mode page for mode_sense */
1847 unsigned char ch_ctrl_m_pg[] = {/* 0xa, 10, */ 0x6, 0, 0, 0, 0, 0,
1848 0, 0, 0, 0};
1849 unsigned char d_ctrl_m_pg[] = {0xa, 10, 2, 0, 0, 0, 0, 0,
1850 0, 0, 0x2, 0x4b};
1851
1852 if (scsi_debug_dsense)
1853 ctrl_m_pg[2] |= 0x4;
1854 else
1855 ctrl_m_pg[2] &= ~0x4;
1856
1857 if (scsi_debug_ato)
1858 ctrl_m_pg[5] |= 0x80; /* ATO=1 */
1859
1860 memcpy(p, ctrl_m_pg, sizeof(ctrl_m_pg));
1861 if (1 == pcontrol)
1862 memcpy(p + 2, ch_ctrl_m_pg, sizeof(ch_ctrl_m_pg));
1863 else if (2 == pcontrol)
1864 memcpy(p, d_ctrl_m_pg, sizeof(d_ctrl_m_pg));
1865 return sizeof(ctrl_m_pg);
1866 }
1867
1868
1869 static int resp_iec_m_pg(unsigned char * p, int pcontrol, int target)
1870 { /* Informational Exceptions control mode page for mode_sense */
1871 unsigned char ch_iec_m_pg[] = {/* 0x1c, 0xa, */ 0x4, 0xf, 0, 0, 0, 0,
1872 0, 0, 0x0, 0x0};
1873 unsigned char d_iec_m_pg[] = {0x1c, 0xa, 0x08, 0, 0, 0, 0, 0,
1874 0, 0, 0x0, 0x0};
1875
1876 memcpy(p, iec_m_pg, sizeof(iec_m_pg));
1877 if (1 == pcontrol)
1878 memcpy(p + 2, ch_iec_m_pg, sizeof(ch_iec_m_pg));
1879 else if (2 == pcontrol)
1880 memcpy(p, d_iec_m_pg, sizeof(d_iec_m_pg));
1881 return sizeof(iec_m_pg);
1882 }
1883
1884 static int resp_sas_sf_m_pg(unsigned char * p, int pcontrol, int target)
1885 { /* SAS SSP mode page - short format for mode_sense */
1886 unsigned char sas_sf_m_pg[] = {0x19, 0x6,
1887 0x6, 0x0, 0x7, 0xd0, 0x0, 0x0};
1888
1889 memcpy(p, sas_sf_m_pg, sizeof(sas_sf_m_pg));
1890 if (1 == pcontrol)
1891 memset(p + 2, 0, sizeof(sas_sf_m_pg) - 2);
1892 return sizeof(sas_sf_m_pg);
1893 }
1894
1895
1896 static int resp_sas_pcd_m_spg(unsigned char * p, int pcontrol, int target,
1897 int target_dev_id)
1898 { /* SAS phy control and discover mode page for mode_sense */
1899 unsigned char sas_pcd_m_pg[] = {0x59, 0x1, 0, 0x64, 0, 0x6, 0, 2,
1900 0, 0, 0, 0, 0x10, 0x9, 0x8, 0x0,
1901 0x52, 0x22, 0x22, 0x20, 0x0, 0x0, 0x0, 0x0,
1902 0x51, 0x11, 0x11, 0x10, 0x0, 0x0, 0x0, 0x1,
1903 0x2, 0, 0, 0, 0, 0, 0, 0,
1904 0x88, 0x99, 0, 0, 0, 0, 0, 0,
1905 0, 0, 0, 0, 0, 0, 0, 0,
1906 0, 1, 0, 0, 0x10, 0x9, 0x8, 0x0,
1907 0x52, 0x22, 0x22, 0x20, 0x0, 0x0, 0x0, 0x0,
1908 0x51, 0x11, 0x11, 0x10, 0x0, 0x0, 0x0, 0x1,
1909 0x3, 0, 0, 0, 0, 0, 0, 0,
1910 0x88, 0x99, 0, 0, 0, 0, 0, 0,
1911 0, 0, 0, 0, 0, 0, 0, 0,
1912 };
1913 int port_a, port_b;
1914
1915 port_a = target_dev_id + 1;
1916 port_b = port_a + 1;
1917 memcpy(p, sas_pcd_m_pg, sizeof(sas_pcd_m_pg));
1918 p[20] = (port_a >> 24);
1919 p[21] = (port_a >> 16) & 0xff;
1920 p[22] = (port_a >> 8) & 0xff;
1921 p[23] = port_a & 0xff;
1922 p[48 + 20] = (port_b >> 24);
1923 p[48 + 21] = (port_b >> 16) & 0xff;
1924 p[48 + 22] = (port_b >> 8) & 0xff;
1925 p[48 + 23] = port_b & 0xff;
1926 if (1 == pcontrol)
1927 memset(p + 4, 0, sizeof(sas_pcd_m_pg) - 4);
1928 return sizeof(sas_pcd_m_pg);
1929 }
1930
1931 static int resp_sas_sha_m_spg(unsigned char * p, int pcontrol)
1932 { /* SAS SSP shared protocol specific port mode subpage */
1933 unsigned char sas_sha_m_pg[] = {0x59, 0x2, 0, 0xc, 0, 0x6, 0x10, 0,
1934 0, 0, 0, 0, 0, 0, 0, 0,
1935 };
1936
1937 memcpy(p, sas_sha_m_pg, sizeof(sas_sha_m_pg));
1938 if (1 == pcontrol)
1939 memset(p + 4, 0, sizeof(sas_sha_m_pg) - 4);
1940 return sizeof(sas_sha_m_pg);
1941 }
1942
1943 #define SDEBUG_MAX_MSENSE_SZ 256
1944
1945 static int
1946 resp_mode_sense(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
1947 {
1948 unsigned char dbd, llbaa;
1949 int pcontrol, pcode, subpcode, bd_len;
1950 unsigned char dev_spec;
1951 int k, alloc_len, msense_6, offset, len, target_dev_id;
1952 int target = scp->device->id;
1953 unsigned char * ap;
1954 unsigned char arr[SDEBUG_MAX_MSENSE_SZ];
1955 unsigned char *cmd = scp->cmnd;
1956
1957 dbd = !!(cmd[1] & 0x8);
1958 pcontrol = (cmd[2] & 0xc0) >> 6;
1959 pcode = cmd[2] & 0x3f;
1960 subpcode = cmd[3];
1961 msense_6 = (MODE_SENSE == cmd[0]);
1962 llbaa = msense_6 ? 0 : !!(cmd[1] & 0x10);
1963 if ((0 == scsi_debug_ptype) && (0 == dbd))
1964 bd_len = llbaa ? 16 : 8;
1965 else
1966 bd_len = 0;
1967 alloc_len = msense_6 ? cmd[4] : ((cmd[7] << 8) | cmd[8]);
1968 memset(arr, 0, SDEBUG_MAX_MSENSE_SZ);
1969 if (0x3 == pcontrol) { /* Saving values not supported */
1970 mk_sense_buffer(scp, ILLEGAL_REQUEST, SAVING_PARAMS_UNSUP, 0);
1971 return check_condition_result;
1972 }
1973 target_dev_id = ((devip->sdbg_host->shost->host_no + 1) * 2000) +
1974 (devip->target * 1000) - 3;
1975 /* set DPOFUA bit for disks */
1976 if (0 == scsi_debug_ptype)
1977 dev_spec = (DEV_READONLY(target) ? 0x80 : 0x0) | 0x10;
1978 else
1979 dev_spec = 0x0;
1980 if (msense_6) {
1981 arr[2] = dev_spec;
1982 arr[3] = bd_len;
1983 offset = 4;
1984 } else {
1985 arr[3] = dev_spec;
1986 if (16 == bd_len)
1987 arr[4] = 0x1; /* set LONGLBA bit */
1988 arr[7] = bd_len; /* assume 255 or less */
1989 offset = 8;
1990 }
1991 ap = arr + offset;
1992 if ((bd_len > 0) && (!sdebug_capacity))
1993 sdebug_capacity = get_sdebug_capacity();
1994
1995 if (8 == bd_len) {
1996 if (sdebug_capacity > 0xfffffffe) {
1997 ap[0] = 0xff;
1998 ap[1] = 0xff;
1999 ap[2] = 0xff;
2000 ap[3] = 0xff;
2001 } else {
2002 ap[0] = (sdebug_capacity >> 24) & 0xff;
2003 ap[1] = (sdebug_capacity >> 16) & 0xff;
2004 ap[2] = (sdebug_capacity >> 8) & 0xff;
2005 ap[3] = sdebug_capacity & 0xff;
2006 }
2007 ap[6] = (scsi_debug_sector_size >> 8) & 0xff;
2008 ap[7] = scsi_debug_sector_size & 0xff;
2009 offset += bd_len;
2010 ap = arr + offset;
2011 } else if (16 == bd_len) {
2012 unsigned long long capac = sdebug_capacity;
2013
2014 for (k = 0; k < 8; ++k, capac >>= 8)
2015 ap[7 - k] = capac & 0xff;
2016 ap[12] = (scsi_debug_sector_size >> 24) & 0xff;
2017 ap[13] = (scsi_debug_sector_size >> 16) & 0xff;
2018 ap[14] = (scsi_debug_sector_size >> 8) & 0xff;
2019 ap[15] = scsi_debug_sector_size & 0xff;
2020 offset += bd_len;
2021 ap = arr + offset;
2022 }
2023
2024 if ((subpcode > 0x0) && (subpcode < 0xff) && (0x19 != pcode)) {
2025 /* TODO: Control Extension page */
2026 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1);
2027 return check_condition_result;
2028 }
2029 switch (pcode) {
2030 case 0x1: /* Read-Write error recovery page, direct access */
2031 len = resp_err_recov_pg(ap, pcontrol, target);
2032 offset += len;
2033 break;
2034 case 0x2: /* Disconnect-Reconnect page, all devices */
2035 len = resp_disconnect_pg(ap, pcontrol, target);
2036 offset += len;
2037 break;
2038 case 0x3: /* Format device page, direct access */
2039 len = resp_format_pg(ap, pcontrol, target);
2040 offset += len;
2041 break;
2042 case 0x8: /* Caching page, direct access */
2043 len = resp_caching_pg(ap, pcontrol, target);
2044 offset += len;
2045 break;
2046 case 0xa: /* Control Mode page, all devices */
2047 len = resp_ctrl_m_pg(ap, pcontrol, target);
2048 offset += len;
2049 break;
2050 case 0x19: /* if spc==1 then sas phy, control+discover */
2051 if ((subpcode > 0x2) && (subpcode < 0xff)) {
2052 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1);
2053 return check_condition_result;
2054 }
2055 len = 0;
2056 if ((0x0 == subpcode) || (0xff == subpcode))
2057 len += resp_sas_sf_m_pg(ap + len, pcontrol, target);
2058 if ((0x1 == subpcode) || (0xff == subpcode))
2059 len += resp_sas_pcd_m_spg(ap + len, pcontrol, target,
2060 target_dev_id);
2061 if ((0x2 == subpcode) || (0xff == subpcode))
2062 len += resp_sas_sha_m_spg(ap + len, pcontrol);
2063 offset += len;
2064 break;
2065 case 0x1c: /* Informational Exceptions Mode page, all devices */
2066 len = resp_iec_m_pg(ap, pcontrol, target);
2067 offset += len;
2068 break;
2069 case 0x3f: /* Read all Mode pages */
2070 if ((0 == subpcode) || (0xff == subpcode)) {
2071 len = resp_err_recov_pg(ap, pcontrol, target);
2072 len += resp_disconnect_pg(ap + len, pcontrol, target);
2073 len += resp_format_pg(ap + len, pcontrol, target);
2074 len += resp_caching_pg(ap + len, pcontrol, target);
2075 len += resp_ctrl_m_pg(ap + len, pcontrol, target);
2076 len += resp_sas_sf_m_pg(ap + len, pcontrol, target);
2077 if (0xff == subpcode) {
2078 len += resp_sas_pcd_m_spg(ap + len, pcontrol,
2079 target, target_dev_id);
2080 len += resp_sas_sha_m_spg(ap + len, pcontrol);
2081 }
2082 len += resp_iec_m_pg(ap + len, pcontrol, target);
2083 } else {
2084 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1);
2085 return check_condition_result;
2086 }
2087 offset += len;
2088 break;
2089 default:
2090 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 5);
2091 return check_condition_result;
2092 }
2093 if (msense_6)
2094 arr[0] = offset - 1;
2095 else {
2096 arr[0] = ((offset - 2) >> 8) & 0xff;
2097 arr[1] = (offset - 2) & 0xff;
2098 }
2099 return fill_from_dev_buffer(scp, arr, min(alloc_len, offset));
2100 }
2101
2102 #define SDEBUG_MAX_MSELECT_SZ 512
2103
2104 static int
2105 resp_mode_select(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
2106 {
2107 int pf, sp, ps, md_len, bd_len, off, spf, pg_len;
2108 int param_len, res, mpage;
2109 unsigned char arr[SDEBUG_MAX_MSELECT_SZ];
2110 unsigned char *cmd = scp->cmnd;
2111 int mselect6 = (MODE_SELECT == cmd[0]);
2112
2113 memset(arr, 0, sizeof(arr));
2114 pf = cmd[1] & 0x10;
2115 sp = cmd[1] & 0x1;
2116 param_len = mselect6 ? cmd[4] : ((cmd[7] << 8) + cmd[8]);
2117 if ((0 == pf) || sp || (param_len > SDEBUG_MAX_MSELECT_SZ)) {
2118 mk_sense_invalid_fld(scp, SDEB_IN_CDB, mselect6 ? 4 : 7, -1);
2119 return check_condition_result;
2120 }
2121 res = fetch_to_dev_buffer(scp, arr, param_len);
2122 if (-1 == res)
2123 return (DID_ERROR << 16);
2124 else if ((res < param_len) &&
2125 (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts))
2126 sdev_printk(KERN_INFO, scp->device,
2127 "%s: cdb indicated=%d, IO sent=%d bytes\n",
2128 __func__, param_len, res);
2129 md_len = mselect6 ? (arr[0] + 1) : ((arr[0] << 8) + arr[1] + 2);
2130 bd_len = mselect6 ? arr[3] : ((arr[6] << 8) + arr[7]);
2131 if (md_len > 2) {
2132 mk_sense_invalid_fld(scp, SDEB_IN_DATA, 0, -1);
2133 return check_condition_result;
2134 }
2135 off = bd_len + (mselect6 ? 4 : 8);
2136 mpage = arr[off] & 0x3f;
2137 ps = !!(arr[off] & 0x80);
2138 if (ps) {
2139 mk_sense_invalid_fld(scp, SDEB_IN_DATA, off, 7);
2140 return check_condition_result;
2141 }
2142 spf = !!(arr[off] & 0x40);
2143 pg_len = spf ? ((arr[off + 2] << 8) + arr[off + 3] + 4) :
2144 (arr[off + 1] + 2);
2145 if ((pg_len + off) > param_len) {
2146 mk_sense_buffer(scp, ILLEGAL_REQUEST,
2147 PARAMETER_LIST_LENGTH_ERR, 0);
2148 return check_condition_result;
2149 }
2150 switch (mpage) {
2151 case 0x8: /* Caching Mode page */
2152 if (caching_pg[1] == arr[off + 1]) {
2153 memcpy(caching_pg + 2, arr + off + 2,
2154 sizeof(caching_pg) - 2);
2155 goto set_mode_changed_ua;
2156 }
2157 break;
2158 case 0xa: /* Control Mode page */
2159 if (ctrl_m_pg[1] == arr[off + 1]) {
2160 memcpy(ctrl_m_pg + 2, arr + off + 2,
2161 sizeof(ctrl_m_pg) - 2);
2162 scsi_debug_dsense = !!(ctrl_m_pg[2] & 0x4);
2163 goto set_mode_changed_ua;
2164 }
2165 break;
2166 case 0x1c: /* Informational Exceptions Mode page */
2167 if (iec_m_pg[1] == arr[off + 1]) {
2168 memcpy(iec_m_pg + 2, arr + off + 2,
2169 sizeof(iec_m_pg) - 2);
2170 goto set_mode_changed_ua;
2171 }
2172 break;
2173 default:
2174 break;
2175 }
2176 mk_sense_invalid_fld(scp, SDEB_IN_DATA, off, 5);
2177 return check_condition_result;
2178 set_mode_changed_ua:
2179 set_bit(SDEBUG_UA_MODE_CHANGED, devip->uas_bm);
2180 return 0;
2181 }
2182
2183 static int resp_temp_l_pg(unsigned char * arr)
2184 {
2185 unsigned char temp_l_pg[] = {0x0, 0x0, 0x3, 0x2, 0x0, 38,
2186 0x0, 0x1, 0x3, 0x2, 0x0, 65,
2187 };
2188
2189 memcpy(arr, temp_l_pg, sizeof(temp_l_pg));
2190 return sizeof(temp_l_pg);
2191 }
2192
2193 static int resp_ie_l_pg(unsigned char * arr)
2194 {
2195 unsigned char ie_l_pg[] = {0x0, 0x0, 0x3, 0x3, 0x0, 0x0, 38,
2196 };
2197
2198 memcpy(arr, ie_l_pg, sizeof(ie_l_pg));
2199 if (iec_m_pg[2] & 0x4) { /* TEST bit set */
2200 arr[4] = THRESHOLD_EXCEEDED;
2201 arr[5] = 0xff;
2202 }
2203 return sizeof(ie_l_pg);
2204 }
2205
2206 #define SDEBUG_MAX_LSENSE_SZ 512
2207
2208 static int resp_log_sense(struct scsi_cmnd * scp,
2209 struct sdebug_dev_info * devip)
2210 {
2211 int ppc, sp, pcontrol, pcode, subpcode, alloc_len, len, n;
2212 unsigned char arr[SDEBUG_MAX_LSENSE_SZ];
2213 unsigned char *cmd = scp->cmnd;
2214
2215 memset(arr, 0, sizeof(arr));
2216 ppc = cmd[1] & 0x2;
2217 sp = cmd[1] & 0x1;
2218 if (ppc || sp) {
2219 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, ppc ? 1 : 0);
2220 return check_condition_result;
2221 }
2222 pcontrol = (cmd[2] & 0xc0) >> 6;
2223 pcode = cmd[2] & 0x3f;
2224 subpcode = cmd[3] & 0xff;
2225 alloc_len = (cmd[7] << 8) + cmd[8];
2226 arr[0] = pcode;
2227 if (0 == subpcode) {
2228 switch (pcode) {
2229 case 0x0: /* Supported log pages log page */
2230 n = 4;
2231 arr[n++] = 0x0; /* this page */
2232 arr[n++] = 0xd; /* Temperature */
2233 arr[n++] = 0x2f; /* Informational exceptions */
2234 arr[3] = n - 4;
2235 break;
2236 case 0xd: /* Temperature log page */
2237 arr[3] = resp_temp_l_pg(arr + 4);
2238 break;
2239 case 0x2f: /* Informational exceptions log page */
2240 arr[3] = resp_ie_l_pg(arr + 4);
2241 break;
2242 default:
2243 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 5);
2244 return check_condition_result;
2245 }
2246 } else if (0xff == subpcode) {
2247 arr[0] |= 0x40;
2248 arr[1] = subpcode;
2249 switch (pcode) {
2250 case 0x0: /* Supported log pages and subpages log page */
2251 n = 4;
2252 arr[n++] = 0x0;
2253 arr[n++] = 0x0; /* 0,0 page */
2254 arr[n++] = 0x0;
2255 arr[n++] = 0xff; /* this page */
2256 arr[n++] = 0xd;
2257 arr[n++] = 0x0; /* Temperature */
2258 arr[n++] = 0x2f;
2259 arr[n++] = 0x0; /* Informational exceptions */
2260 arr[3] = n - 4;
2261 break;
2262 case 0xd: /* Temperature subpages */
2263 n = 4;
2264 arr[n++] = 0xd;
2265 arr[n++] = 0x0; /* Temperature */
2266 arr[3] = n - 4;
2267 break;
2268 case 0x2f: /* Informational exceptions subpages */
2269 n = 4;
2270 arr[n++] = 0x2f;
2271 arr[n++] = 0x0; /* Informational exceptions */
2272 arr[3] = n - 4;
2273 break;
2274 default:
2275 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 5);
2276 return check_condition_result;
2277 }
2278 } else {
2279 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1);
2280 return check_condition_result;
2281 }
2282 len = min(((arr[2] << 8) + arr[3]) + 4, alloc_len);
2283 return fill_from_dev_buffer(scp, arr,
2284 min(len, SDEBUG_MAX_INQ_ARR_SZ));
2285 }
2286
2287 static int check_device_access_params(struct scsi_cmnd *scp,
2288 unsigned long long lba, unsigned int num)
2289 {
2290 if (lba + num > sdebug_capacity) {
2291 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
2292 return check_condition_result;
2293 }
2294 /* transfer length excessive (tie in to block limits VPD page) */
2295 if (num > sdebug_store_sectors) {
2296 /* needs work to find which cdb byte 'num' comes from */
2297 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
2298 return check_condition_result;
2299 }
2300 return 0;
2301 }
2302
2303 /* Returns number of bytes copied or -1 if error. */
2304 static int
2305 do_device_access(struct scsi_cmnd *scmd, u64 lba, u32 num, bool do_write)
2306 {
2307 int ret;
2308 u64 block, rest = 0;
2309 struct scsi_data_buffer *sdb;
2310 enum dma_data_direction dir;
2311 size_t (*func)(struct scatterlist *, unsigned int, void *, size_t,
2312 off_t);
2313
2314 if (do_write) {
2315 sdb = scsi_out(scmd);
2316 dir = DMA_TO_DEVICE;
2317 func = sg_pcopy_to_buffer;
2318 } else {
2319 sdb = scsi_in(scmd);
2320 dir = DMA_FROM_DEVICE;
2321 func = sg_pcopy_from_buffer;
2322 }
2323
2324 if (!sdb->length)
2325 return 0;
2326 if (!(scsi_bidi_cmnd(scmd) || scmd->sc_data_direction == dir))
2327 return -1;
2328
2329 block = do_div(lba, sdebug_store_sectors);
2330 if (block + num > sdebug_store_sectors)
2331 rest = block + num - sdebug_store_sectors;
2332
2333 ret = func(sdb->table.sgl, sdb->table.nents,
2334 fake_storep + (block * scsi_debug_sector_size),
2335 (num - rest) * scsi_debug_sector_size, 0);
2336 if (ret != (num - rest) * scsi_debug_sector_size)
2337 return ret;
2338
2339 if (rest) {
2340 ret += func(sdb->table.sgl, sdb->table.nents,
2341 fake_storep, rest * scsi_debug_sector_size,
2342 (num - rest) * scsi_debug_sector_size);
2343 }
2344
2345 return ret;
2346 }
2347
2348 /* If fake_store(lba,num) compares equal to arr(num), then copy top half of
2349 * arr into fake_store(lba,num) and return true. If comparison fails then
2350 * return false. */
2351 static bool
2352 comp_write_worker(u64 lba, u32 num, const u8 *arr)
2353 {
2354 bool res;
2355 u64 block, rest = 0;
2356 u32 store_blks = sdebug_store_sectors;
2357 u32 lb_size = scsi_debug_sector_size;
2358
2359 block = do_div(lba, store_blks);
2360 if (block + num > store_blks)
2361 rest = block + num - store_blks;
2362
2363 res = !memcmp(fake_storep + (block * lb_size), arr,
2364 (num - rest) * lb_size);
2365 if (!res)
2366 return res;
2367 if (rest)
2368 res = memcmp(fake_storep, arr + ((num - rest) * lb_size),
2369 rest * lb_size);
2370 if (!res)
2371 return res;
2372 arr += num * lb_size;
2373 memcpy(fake_storep + (block * lb_size), arr, (num - rest) * lb_size);
2374 if (rest)
2375 memcpy(fake_storep, arr + ((num - rest) * lb_size),
2376 rest * lb_size);
2377 return res;
2378 }
2379
2380 static __be16 dif_compute_csum(const void *buf, int len)
2381 {
2382 __be16 csum;
2383
2384 if (scsi_debug_guard)
2385 csum = (__force __be16)ip_compute_csum(buf, len);
2386 else
2387 csum = cpu_to_be16(crc_t10dif(buf, len));
2388
2389 return csum;
2390 }
2391
2392 static int dif_verify(struct sd_dif_tuple *sdt, const void *data,
2393 sector_t sector, u32 ei_lba)
2394 {
2395 __be16 csum = dif_compute_csum(data, scsi_debug_sector_size);
2396
2397 if (sdt->guard_tag != csum) {
2398 pr_err("%s: GUARD check failed on sector %lu rcvd 0x%04x, data 0x%04x\n",
2399 __func__,
2400 (unsigned long)sector,
2401 be16_to_cpu(sdt->guard_tag),
2402 be16_to_cpu(csum));
2403 return 0x01;
2404 }
2405 if (scsi_debug_dif == SD_DIF_TYPE1_PROTECTION &&
2406 be32_to_cpu(sdt->ref_tag) != (sector & 0xffffffff)) {
2407 pr_err("%s: REF check failed on sector %lu\n",
2408 __func__, (unsigned long)sector);
2409 return 0x03;
2410 }
2411 if (scsi_debug_dif == SD_DIF_TYPE2_PROTECTION &&
2412 be32_to_cpu(sdt->ref_tag) != ei_lba) {
2413 pr_err("%s: REF check failed on sector %lu\n",
2414 __func__, (unsigned long)sector);
2415 return 0x03;
2416 }
2417 return 0;
2418 }
2419
2420 static void dif_copy_prot(struct scsi_cmnd *SCpnt, sector_t sector,
2421 unsigned int sectors, bool read)
2422 {
2423 size_t resid;
2424 void *paddr;
2425 const void *dif_store_end = dif_storep + sdebug_store_sectors;
2426 struct sg_mapping_iter miter;
2427
2428 /* Bytes of protection data to copy into sgl */
2429 resid = sectors * sizeof(*dif_storep);
2430
2431 sg_miter_start(&miter, scsi_prot_sglist(SCpnt),
2432 scsi_prot_sg_count(SCpnt), SG_MITER_ATOMIC |
2433 (read ? SG_MITER_TO_SG : SG_MITER_FROM_SG));
2434
2435 while (sg_miter_next(&miter) && resid > 0) {
2436 size_t len = min(miter.length, resid);
2437 void *start = dif_store(sector);
2438 size_t rest = 0;
2439
2440 if (dif_store_end < start + len)
2441 rest = start + len - dif_store_end;
2442
2443 paddr = miter.addr;
2444
2445 if (read)
2446 memcpy(paddr, start, len - rest);
2447 else
2448 memcpy(start, paddr, len - rest);
2449
2450 if (rest) {
2451 if (read)
2452 memcpy(paddr + len - rest, dif_storep, rest);
2453 else
2454 memcpy(dif_storep, paddr + len - rest, rest);
2455 }
2456
2457 sector += len / sizeof(*dif_storep);
2458 resid -= len;
2459 }
2460 sg_miter_stop(&miter);
2461 }
2462
2463 static int prot_verify_read(struct scsi_cmnd *SCpnt, sector_t start_sec,
2464 unsigned int sectors, u32 ei_lba)
2465 {
2466 unsigned int i;
2467 struct sd_dif_tuple *sdt;
2468 sector_t sector;
2469
2470 for (i = 0; i < sectors; i++, ei_lba++) {
2471 int ret;
2472
2473 sector = start_sec + i;
2474 sdt = dif_store(sector);
2475
2476 if (sdt->app_tag == cpu_to_be16(0xffff))
2477 continue;
2478
2479 ret = dif_verify(sdt, fake_store(sector), sector, ei_lba);
2480 if (ret) {
2481 dif_errors++;
2482 return ret;
2483 }
2484 }
2485
2486 dif_copy_prot(SCpnt, start_sec, sectors, true);
2487 dix_reads++;
2488
2489 return 0;
2490 }
2491
2492 static int
2493 resp_read_dt0(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
2494 {
2495 u8 *cmd = scp->cmnd;
2496 u64 lba;
2497 u32 num;
2498 u32 ei_lba;
2499 unsigned long iflags;
2500 int ret;
2501 bool check_prot;
2502
2503 switch (cmd[0]) {
2504 case READ_16:
2505 ei_lba = 0;
2506 lba = get_unaligned_be64(cmd + 2);
2507 num = get_unaligned_be32(cmd + 10);
2508 check_prot = true;
2509 break;
2510 case READ_10:
2511 ei_lba = 0;
2512 lba = get_unaligned_be32(cmd + 2);
2513 num = get_unaligned_be16(cmd + 7);
2514 check_prot = true;
2515 break;
2516 case READ_6:
2517 ei_lba = 0;
2518 lba = (u32)cmd[3] | (u32)cmd[2] << 8 |
2519 (u32)(cmd[1] & 0x1f) << 16;
2520 num = (0 == cmd[4]) ? 256 : cmd[4];
2521 check_prot = true;
2522 break;
2523 case READ_12:
2524 ei_lba = 0;
2525 lba = get_unaligned_be32(cmd + 2);
2526 num = get_unaligned_be32(cmd + 6);
2527 check_prot = true;
2528 break;
2529 case XDWRITEREAD_10:
2530 ei_lba = 0;
2531 lba = get_unaligned_be32(cmd + 2);
2532 num = get_unaligned_be16(cmd + 7);
2533 check_prot = false;
2534 break;
2535 default: /* assume READ(32) */
2536 lba = get_unaligned_be64(cmd + 12);
2537 ei_lba = get_unaligned_be32(cmd + 20);
2538 num = get_unaligned_be32(cmd + 28);
2539 check_prot = false;
2540 break;
2541 }
2542 if (check_prot) {
2543 if (scsi_debug_dif == SD_DIF_TYPE2_PROTECTION &&
2544 (cmd[1] & 0xe0)) {
2545 mk_sense_invalid_opcode(scp);
2546 return check_condition_result;
2547 }
2548 if ((scsi_debug_dif == SD_DIF_TYPE1_PROTECTION ||
2549 scsi_debug_dif == SD_DIF_TYPE3_PROTECTION) &&
2550 (cmd[1] & 0xe0) == 0)
2551 sdev_printk(KERN_ERR, scp->device, "Unprotected RD "
2552 "to DIF device\n");
2553 }
2554 if (sdebug_any_injecting_opt) {
2555 struct sdebug_scmd_extra_t *ep = scsi_cmd_priv(scp);
2556
2557 if (ep->inj_short)
2558 num /= 2;
2559 }
2560
2561 /* inline check_device_access_params() */
2562 if (lba + num > sdebug_capacity) {
2563 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
2564 return check_condition_result;
2565 }
2566 /* transfer length excessive (tie in to block limits VPD page) */
2567 if (num > sdebug_store_sectors) {
2568 /* needs work to find which cdb byte 'num' comes from */
2569 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
2570 return check_condition_result;
2571 }
2572
2573 if ((SCSI_DEBUG_OPT_MEDIUM_ERR & scsi_debug_opts) &&
2574 (lba <= (OPT_MEDIUM_ERR_ADDR + OPT_MEDIUM_ERR_NUM - 1)) &&
2575 ((lba + num) > OPT_MEDIUM_ERR_ADDR)) {
2576 /* claim unrecoverable read error */
2577 mk_sense_buffer(scp, MEDIUM_ERROR, UNRECOVERED_READ_ERR, 0);
2578 /* set info field and valid bit for fixed descriptor */
2579 if (0x70 == (scp->sense_buffer[0] & 0x7f)) {
2580 scp->sense_buffer[0] |= 0x80; /* Valid bit */
2581 ret = (lba < OPT_MEDIUM_ERR_ADDR)
2582 ? OPT_MEDIUM_ERR_ADDR : (int)lba;
2583 put_unaligned_be32(ret, scp->sense_buffer + 3);
2584 }
2585 scsi_set_resid(scp, scsi_bufflen(scp));
2586 return check_condition_result;
2587 }
2588
2589 read_lock_irqsave(&atomic_rw, iflags);
2590
2591 /* DIX + T10 DIF */
2592 if (scsi_debug_dix && scsi_prot_sg_count(scp)) {
2593 int prot_ret = prot_verify_read(scp, lba, num, ei_lba);
2594
2595 if (prot_ret) {
2596 read_unlock_irqrestore(&atomic_rw, iflags);
2597 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, prot_ret);
2598 return illegal_condition_result;
2599 }
2600 }
2601
2602 ret = do_device_access(scp, lba, num, false);
2603 read_unlock_irqrestore(&atomic_rw, iflags);
2604 if (ret == -1)
2605 return DID_ERROR << 16;
2606
2607 scsi_in(scp)->resid = scsi_bufflen(scp) - ret;
2608
2609 if (sdebug_any_injecting_opt) {
2610 struct sdebug_scmd_extra_t *ep = scsi_cmd_priv(scp);
2611
2612 if (ep->inj_recovered) {
2613 mk_sense_buffer(scp, RECOVERED_ERROR,
2614 THRESHOLD_EXCEEDED, 0);
2615 return check_condition_result;
2616 } else if (ep->inj_transport) {
2617 mk_sense_buffer(scp, ABORTED_COMMAND,
2618 TRANSPORT_PROBLEM, ACK_NAK_TO);
2619 return check_condition_result;
2620 } else if (ep->inj_dif) {
2621 /* Logical block guard check failed */
2622 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 1);
2623 return illegal_condition_result;
2624 } else if (ep->inj_dix) {
2625 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 1);
2626 return illegal_condition_result;
2627 }
2628 }
2629 return 0;
2630 }
2631
2632 void dump_sector(unsigned char *buf, int len)
2633 {
2634 int i, j, n;
2635
2636 pr_err(">>> Sector Dump <<<\n");
2637 for (i = 0 ; i < len ; i += 16) {
2638 char b[128];
2639
2640 for (j = 0, n = 0; j < 16; j++) {
2641 unsigned char c = buf[i+j];
2642
2643 if (c >= 0x20 && c < 0x7e)
2644 n += scnprintf(b + n, sizeof(b) - n,
2645 " %c ", buf[i+j]);
2646 else
2647 n += scnprintf(b + n, sizeof(b) - n,
2648 "%02x ", buf[i+j]);
2649 }
2650 pr_err("%04d: %s\n", i, b);
2651 }
2652 }
2653
2654 static int prot_verify_write(struct scsi_cmnd *SCpnt, sector_t start_sec,
2655 unsigned int sectors, u32 ei_lba)
2656 {
2657 int ret;
2658 struct sd_dif_tuple *sdt;
2659 void *daddr;
2660 sector_t sector = start_sec;
2661 int ppage_offset;
2662 int dpage_offset;
2663 struct sg_mapping_iter diter;
2664 struct sg_mapping_iter piter;
2665
2666 BUG_ON(scsi_sg_count(SCpnt) == 0);
2667 BUG_ON(scsi_prot_sg_count(SCpnt) == 0);
2668
2669 sg_miter_start(&piter, scsi_prot_sglist(SCpnt),
2670 scsi_prot_sg_count(SCpnt),
2671 SG_MITER_ATOMIC | SG_MITER_FROM_SG);
2672 sg_miter_start(&diter, scsi_sglist(SCpnt), scsi_sg_count(SCpnt),
2673 SG_MITER_ATOMIC | SG_MITER_FROM_SG);
2674
2675 /* For each protection page */
2676 while (sg_miter_next(&piter)) {
2677 dpage_offset = 0;
2678 if (WARN_ON(!sg_miter_next(&diter))) {
2679 ret = 0x01;
2680 goto out;
2681 }
2682
2683 for (ppage_offset = 0; ppage_offset < piter.length;
2684 ppage_offset += sizeof(struct sd_dif_tuple)) {
2685 /* If we're at the end of the current
2686 * data page advance to the next one
2687 */
2688 if (dpage_offset >= diter.length) {
2689 if (WARN_ON(!sg_miter_next(&diter))) {
2690 ret = 0x01;
2691 goto out;
2692 }
2693 dpage_offset = 0;
2694 }
2695
2696 sdt = piter.addr + ppage_offset;
2697 daddr = diter.addr + dpage_offset;
2698
2699 ret = dif_verify(sdt, daddr, sector, ei_lba);
2700 if (ret) {
2701 dump_sector(daddr, scsi_debug_sector_size);
2702 goto out;
2703 }
2704
2705 sector++;
2706 ei_lba++;
2707 dpage_offset += scsi_debug_sector_size;
2708 }
2709 diter.consumed = dpage_offset;
2710 sg_miter_stop(&diter);
2711 }
2712 sg_miter_stop(&piter);
2713
2714 dif_copy_prot(SCpnt, start_sec, sectors, false);
2715 dix_writes++;
2716
2717 return 0;
2718
2719 out:
2720 dif_errors++;
2721 sg_miter_stop(&diter);
2722 sg_miter_stop(&piter);
2723 return ret;
2724 }
2725
2726 static unsigned long lba_to_map_index(sector_t lba)
2727 {
2728 if (scsi_debug_unmap_alignment) {
2729 lba += scsi_debug_unmap_granularity -
2730 scsi_debug_unmap_alignment;
2731 }
2732 do_div(lba, scsi_debug_unmap_granularity);
2733
2734 return lba;
2735 }
2736
2737 static sector_t map_index_to_lba(unsigned long index)
2738 {
2739 sector_t lba = index * scsi_debug_unmap_granularity;
2740
2741 if (scsi_debug_unmap_alignment) {
2742 lba -= scsi_debug_unmap_granularity -
2743 scsi_debug_unmap_alignment;
2744 }
2745
2746 return lba;
2747 }
2748
2749 static unsigned int map_state(sector_t lba, unsigned int *num)
2750 {
2751 sector_t end;
2752 unsigned int mapped;
2753 unsigned long index;
2754 unsigned long next;
2755
2756 index = lba_to_map_index(lba);
2757 mapped = test_bit(index, map_storep);
2758
2759 if (mapped)
2760 next = find_next_zero_bit(map_storep, map_size, index);
2761 else
2762 next = find_next_bit(map_storep, map_size, index);
2763
2764 end = min_t(sector_t, sdebug_store_sectors, map_index_to_lba(next));
2765 *num = end - lba;
2766
2767 return mapped;
2768 }
2769
2770 static void map_region(sector_t lba, unsigned int len)
2771 {
2772 sector_t end = lba + len;
2773
2774 while (lba < end) {
2775 unsigned long index = lba_to_map_index(lba);
2776
2777 if (index < map_size)
2778 set_bit(index, map_storep);
2779
2780 lba = map_index_to_lba(index + 1);
2781 }
2782 }
2783
2784 static void unmap_region(sector_t lba, unsigned int len)
2785 {
2786 sector_t end = lba + len;
2787
2788 while (lba < end) {
2789 unsigned long index = lba_to_map_index(lba);
2790
2791 if (lba == map_index_to_lba(index) &&
2792 lba + scsi_debug_unmap_granularity <= end &&
2793 index < map_size) {
2794 clear_bit(index, map_storep);
2795 if (scsi_debug_lbprz) {
2796 memset(fake_storep +
2797 lba * scsi_debug_sector_size, 0,
2798 scsi_debug_sector_size *
2799 scsi_debug_unmap_granularity);
2800 }
2801 if (dif_storep) {
2802 memset(dif_storep + lba, 0xff,
2803 sizeof(*dif_storep) *
2804 scsi_debug_unmap_granularity);
2805 }
2806 }
2807 lba = map_index_to_lba(index + 1);
2808 }
2809 }
2810
2811 static int
2812 resp_write_dt0(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
2813 {
2814 u8 *cmd = scp->cmnd;
2815 u64 lba;
2816 u32 num;
2817 u32 ei_lba;
2818 unsigned long iflags;
2819 int ret;
2820 bool check_prot;
2821
2822 switch (cmd[0]) {
2823 case WRITE_16:
2824 ei_lba = 0;
2825 lba = get_unaligned_be64(cmd + 2);
2826 num = get_unaligned_be32(cmd + 10);
2827 check_prot = true;
2828 break;
2829 case WRITE_10:
2830 ei_lba = 0;
2831 lba = get_unaligned_be32(cmd + 2);
2832 num = get_unaligned_be16(cmd + 7);
2833 check_prot = true;
2834 break;
2835 case WRITE_6:
2836 ei_lba = 0;
2837 lba = (u32)cmd[3] | (u32)cmd[2] << 8 |
2838 (u32)(cmd[1] & 0x1f) << 16;
2839 num = (0 == cmd[4]) ? 256 : cmd[4];
2840 check_prot = true;
2841 break;
2842 case WRITE_12:
2843 ei_lba = 0;
2844 lba = get_unaligned_be32(cmd + 2);
2845 num = get_unaligned_be32(cmd + 6);
2846 check_prot = true;
2847 break;
2848 case 0x53: /* XDWRITEREAD(10) */
2849 ei_lba = 0;
2850 lba = get_unaligned_be32(cmd + 2);
2851 num = get_unaligned_be16(cmd + 7);
2852 check_prot = false;
2853 break;
2854 default: /* assume WRITE(32) */
2855 lba = get_unaligned_be64(cmd + 12);
2856 ei_lba = get_unaligned_be32(cmd + 20);
2857 num = get_unaligned_be32(cmd + 28);
2858 check_prot = false;
2859 break;
2860 }
2861 if (check_prot) {
2862 if (scsi_debug_dif == SD_DIF_TYPE2_PROTECTION &&
2863 (cmd[1] & 0xe0)) {
2864 mk_sense_invalid_opcode(scp);
2865 return check_condition_result;
2866 }
2867 if ((scsi_debug_dif == SD_DIF_TYPE1_PROTECTION ||
2868 scsi_debug_dif == SD_DIF_TYPE3_PROTECTION) &&
2869 (cmd[1] & 0xe0) == 0)
2870 sdev_printk(KERN_ERR, scp->device, "Unprotected WR "
2871 "to DIF device\n");
2872 }
2873
2874 /* inline check_device_access_params() */
2875 if (lba + num > sdebug_capacity) {
2876 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
2877 return check_condition_result;
2878 }
2879 /* transfer length excessive (tie in to block limits VPD page) */
2880 if (num > sdebug_store_sectors) {
2881 /* needs work to find which cdb byte 'num' comes from */
2882 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
2883 return check_condition_result;
2884 }
2885
2886 write_lock_irqsave(&atomic_rw, iflags);
2887
2888 /* DIX + T10 DIF */
2889 if (scsi_debug_dix && scsi_prot_sg_count(scp)) {
2890 int prot_ret = prot_verify_write(scp, lba, num, ei_lba);
2891
2892 if (prot_ret) {
2893 write_unlock_irqrestore(&atomic_rw, iflags);
2894 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, prot_ret);
2895 return illegal_condition_result;
2896 }
2897 }
2898
2899 ret = do_device_access(scp, lba, num, true);
2900 if (scsi_debug_lbp())
2901 map_region(lba, num);
2902 write_unlock_irqrestore(&atomic_rw, iflags);
2903 if (-1 == ret)
2904 return (DID_ERROR << 16);
2905 else if ((ret < (num * scsi_debug_sector_size)) &&
2906 (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts))
2907 sdev_printk(KERN_INFO, scp->device,
2908 "%s: write: cdb indicated=%u, IO sent=%d bytes\n",
2909 my_name, num * scsi_debug_sector_size, ret);
2910
2911 if (sdebug_any_injecting_opt) {
2912 struct sdebug_scmd_extra_t *ep = scsi_cmd_priv(scp);
2913
2914 if (ep->inj_recovered) {
2915 mk_sense_buffer(scp, RECOVERED_ERROR,
2916 THRESHOLD_EXCEEDED, 0);
2917 return check_condition_result;
2918 } else if (ep->inj_dif) {
2919 /* Logical block guard check failed */
2920 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 1);
2921 return illegal_condition_result;
2922 } else if (ep->inj_dix) {
2923 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 1);
2924 return illegal_condition_result;
2925 }
2926 }
2927 return 0;
2928 }
2929
2930 static int
2931 resp_write_same(struct scsi_cmnd *scp, u64 lba, u32 num, u32 ei_lba,
2932 bool unmap, bool ndob)
2933 {
2934 unsigned long iflags;
2935 unsigned long long i;
2936 int ret;
2937
2938 ret = check_device_access_params(scp, lba, num);
2939 if (ret)
2940 return ret;
2941
2942 write_lock_irqsave(&atomic_rw, iflags);
2943
2944 if (unmap && scsi_debug_lbp()) {
2945 unmap_region(lba, num);
2946 goto out;
2947 }
2948
2949 /* if ndob then zero 1 logical block, else fetch 1 logical block */
2950 if (ndob) {
2951 memset(fake_storep + (lba * scsi_debug_sector_size), 0,
2952 scsi_debug_sector_size);
2953 ret = 0;
2954 } else
2955 ret = fetch_to_dev_buffer(scp, fake_storep +
2956 (lba * scsi_debug_sector_size),
2957 scsi_debug_sector_size);
2958
2959 if (-1 == ret) {
2960 write_unlock_irqrestore(&atomic_rw, iflags);
2961 return (DID_ERROR << 16);
2962 } else if ((ret < (num * scsi_debug_sector_size)) &&
2963 (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts))
2964 sdev_printk(KERN_INFO, scp->device,
2965 "%s: %s: cdb indicated=%u, IO sent=%d bytes\n",
2966 my_name, "write same",
2967 num * scsi_debug_sector_size, ret);
2968
2969 /* Copy first sector to remaining blocks */
2970 for (i = 1 ; i < num ; i++)
2971 memcpy(fake_storep + ((lba + i) * scsi_debug_sector_size),
2972 fake_storep + (lba * scsi_debug_sector_size),
2973 scsi_debug_sector_size);
2974
2975 if (scsi_debug_lbp())
2976 map_region(lba, num);
2977 out:
2978 write_unlock_irqrestore(&atomic_rw, iflags);
2979
2980 return 0;
2981 }
2982
2983 static int
2984 resp_write_same_10(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
2985 {
2986 u8 *cmd = scp->cmnd;
2987 u32 lba;
2988 u16 num;
2989 u32 ei_lba = 0;
2990 bool unmap = false;
2991
2992 if (cmd[1] & 0x8) {
2993 if (scsi_debug_lbpws10 == 0) {
2994 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 3);
2995 return check_condition_result;
2996 } else
2997 unmap = true;
2998 }
2999 lba = get_unaligned_be32(cmd + 2);
3000 num = get_unaligned_be16(cmd + 7);
3001 if (num > scsi_debug_write_same_length) {
3002 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 7, -1);
3003 return check_condition_result;
3004 }
3005 return resp_write_same(scp, lba, num, ei_lba, unmap, false);
3006 }
3007
3008 static int
3009 resp_write_same_16(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
3010 {
3011 u8 *cmd = scp->cmnd;
3012 u64 lba;
3013 u32 num;
3014 u32 ei_lba = 0;
3015 bool unmap = false;
3016 bool ndob = false;
3017
3018 if (cmd[1] & 0x8) { /* UNMAP */
3019 if (scsi_debug_lbpws == 0) {
3020 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 3);
3021 return check_condition_result;
3022 } else
3023 unmap = true;
3024 }
3025 if (cmd[1] & 0x1) /* NDOB (no data-out buffer, assumes zeroes) */
3026 ndob = true;
3027 lba = get_unaligned_be64(cmd + 2);
3028 num = get_unaligned_be32(cmd + 10);
3029 if (num > scsi_debug_write_same_length) {
3030 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 10, -1);
3031 return check_condition_result;
3032 }
3033 return resp_write_same(scp, lba, num, ei_lba, unmap, ndob);
3034 }
3035
3036 static int
3037 resp_comp_write(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
3038 {
3039 u8 *cmd = scp->cmnd;
3040 u8 *arr;
3041 u8 *fake_storep_hold;
3042 u64 lba;
3043 u32 dnum;
3044 u32 lb_size = scsi_debug_sector_size;
3045 u8 num;
3046 unsigned long iflags;
3047 int ret;
3048
3049 lba = get_unaligned_be32(cmd + 2);
3050 num = cmd[13]; /* 1 to a maximum of 255 logical blocks */
3051 if (0 == num)
3052 return 0; /* degenerate case, not an error */
3053 dnum = 2 * num;
3054 arr = kzalloc(dnum * lb_size, GFP_ATOMIC);
3055 if (NULL == arr) {
3056 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
3057 INSUFF_RES_ASCQ);
3058 return check_condition_result;
3059 }
3060 if (scsi_debug_dif == SD_DIF_TYPE2_PROTECTION &&
3061 (cmd[1] & 0xe0)) {
3062 mk_sense_invalid_opcode(scp);
3063 return check_condition_result;
3064 }
3065 if ((scsi_debug_dif == SD_DIF_TYPE1_PROTECTION ||
3066 scsi_debug_dif == SD_DIF_TYPE3_PROTECTION) &&
3067 (cmd[1] & 0xe0) == 0)
3068 sdev_printk(KERN_ERR, scp->device, "Unprotected WR "
3069 "to DIF device\n");
3070
3071 /* inline check_device_access_params() */
3072 if (lba + num > sdebug_capacity) {
3073 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
3074 return check_condition_result;
3075 }
3076 /* transfer length excessive (tie in to block limits VPD page) */
3077 if (num > sdebug_store_sectors) {
3078 /* needs work to find which cdb byte 'num' comes from */
3079 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
3080 return check_condition_result;
3081 }
3082
3083 write_lock_irqsave(&atomic_rw, iflags);
3084
3085 /* trick do_device_access() to fetch both compare and write buffers
3086 * from data-in into arr. Safe (atomic) since write_lock held. */
3087 fake_storep_hold = fake_storep;
3088 fake_storep = arr;
3089 ret = do_device_access(scp, 0, dnum, true);
3090 fake_storep = fake_storep_hold;
3091 if (ret == -1) {
3092 write_unlock_irqrestore(&atomic_rw, iflags);
3093 kfree(arr);
3094 return DID_ERROR << 16;
3095 } else if ((ret < (dnum * lb_size)) &&
3096 (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts))
3097 sdev_printk(KERN_INFO, scp->device, "%s: compare_write: cdb "
3098 "indicated=%u, IO sent=%d bytes\n", my_name,
3099 dnum * lb_size, ret);
3100 if (!comp_write_worker(lba, num, arr)) {
3101 write_unlock_irqrestore(&atomic_rw, iflags);
3102 kfree(arr);
3103 mk_sense_buffer(scp, MISCOMPARE, MISCOMPARE_VERIFY_ASC, 0);
3104 return check_condition_result;
3105 }
3106 if (scsi_debug_lbp())
3107 map_region(lba, num);
3108 write_unlock_irqrestore(&atomic_rw, iflags);
3109 return 0;
3110 }
3111
3112 struct unmap_block_desc {
3113 __be64 lba;
3114 __be32 blocks;
3115 __be32 __reserved;
3116 };
3117
3118 static int
3119 resp_unmap(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
3120 {
3121 unsigned char *buf;
3122 struct unmap_block_desc *desc;
3123 unsigned int i, payload_len, descriptors;
3124 int ret;
3125 unsigned long iflags;
3126
3127
3128 if (!scsi_debug_lbp())
3129 return 0; /* fib and say its done */
3130 payload_len = get_unaligned_be16(scp->cmnd + 7);
3131 BUG_ON(scsi_bufflen(scp) != payload_len);
3132
3133 descriptors = (payload_len - 8) / 16;
3134 if (descriptors > scsi_debug_unmap_max_desc) {
3135 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 7, -1);
3136 return check_condition_result;
3137 }
3138
3139 buf = kmalloc(scsi_bufflen(scp), GFP_ATOMIC);
3140 if (!buf) {
3141 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
3142 INSUFF_RES_ASCQ);
3143 return check_condition_result;
3144 }
3145
3146 scsi_sg_copy_to_buffer(scp, buf, scsi_bufflen(scp));
3147
3148 BUG_ON(get_unaligned_be16(&buf[0]) != payload_len - 2);
3149 BUG_ON(get_unaligned_be16(&buf[2]) != descriptors * 16);
3150
3151 desc = (void *)&buf[8];
3152
3153 write_lock_irqsave(&atomic_rw, iflags);
3154
3155 for (i = 0 ; i < descriptors ; i++) {
3156 unsigned long long lba = get_unaligned_be64(&desc[i].lba);
3157 unsigned int num = get_unaligned_be32(&desc[i].blocks);
3158
3159 ret = check_device_access_params(scp, lba, num);
3160 if (ret)
3161 goto out;
3162
3163 unmap_region(lba, num);
3164 }
3165
3166 ret = 0;
3167
3168 out:
3169 write_unlock_irqrestore(&atomic_rw, iflags);
3170 kfree(buf);
3171
3172 return ret;
3173 }
3174
3175 #define SDEBUG_GET_LBA_STATUS_LEN 32
3176
3177 static int
3178 resp_get_lba_status(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
3179 {
3180 u8 *cmd = scp->cmnd;
3181 u64 lba;
3182 u32 alloc_len, mapped, num;
3183 u8 arr[SDEBUG_GET_LBA_STATUS_LEN];
3184 int ret;
3185
3186 lba = get_unaligned_be64(cmd + 2);
3187 alloc_len = get_unaligned_be32(cmd + 10);
3188
3189 if (alloc_len < 24)
3190 return 0;
3191
3192 ret = check_device_access_params(scp, lba, 1);
3193 if (ret)
3194 return ret;
3195
3196 if (scsi_debug_lbp())
3197 mapped = map_state(lba, &num);
3198 else {
3199 mapped = 1;
3200 /* following just in case virtual_gb changed */
3201 sdebug_capacity = get_sdebug_capacity();
3202 if (sdebug_capacity - lba <= 0xffffffff)
3203 num = sdebug_capacity - lba;
3204 else
3205 num = 0xffffffff;
3206 }
3207
3208 memset(arr, 0, SDEBUG_GET_LBA_STATUS_LEN);
3209 put_unaligned_be32(20, arr); /* Parameter Data Length */
3210 put_unaligned_be64(lba, arr + 8); /* LBA */
3211 put_unaligned_be32(num, arr + 16); /* Number of blocks */
3212 arr[20] = !mapped; /* prov_stat=0: mapped; 1: dealloc */
3213
3214 return fill_from_dev_buffer(scp, arr, SDEBUG_GET_LBA_STATUS_LEN);
3215 }
3216
3217 #define SDEBUG_RLUN_ARR_SZ 256
3218
3219 static int resp_report_luns(struct scsi_cmnd * scp,
3220 struct sdebug_dev_info * devip)
3221 {
3222 unsigned int alloc_len;
3223 int lun_cnt, i, upper, num, n, want_wlun, shortish;
3224 u64 lun;
3225 unsigned char *cmd = scp->cmnd;
3226 int select_report = (int)cmd[2];
3227 struct scsi_lun *one_lun;
3228 unsigned char arr[SDEBUG_RLUN_ARR_SZ];
3229 unsigned char * max_addr;
3230
3231 alloc_len = cmd[9] + (cmd[8] << 8) + (cmd[7] << 16) + (cmd[6] << 24);
3232 shortish = (alloc_len < 4);
3233 if (shortish || (select_report > 2)) {
3234 mk_sense_invalid_fld(scp, SDEB_IN_CDB, shortish ? 6 : 2, -1);
3235 return check_condition_result;
3236 }
3237 /* can produce response with up to 16k luns (lun 0 to lun 16383) */
3238 memset(arr, 0, SDEBUG_RLUN_ARR_SZ);
3239 lun_cnt = scsi_debug_max_luns;
3240 if (1 == select_report)
3241 lun_cnt = 0;
3242 else if (scsi_debug_no_lun_0 && (lun_cnt > 0))
3243 --lun_cnt;
3244 want_wlun = (select_report > 0) ? 1 : 0;
3245 num = lun_cnt + want_wlun;
3246 arr[2] = ((sizeof(struct scsi_lun) * num) >> 8) & 0xff;
3247 arr[3] = (sizeof(struct scsi_lun) * num) & 0xff;
3248 n = min((int)((SDEBUG_RLUN_ARR_SZ - 8) /
3249 sizeof(struct scsi_lun)), num);
3250 if (n < num) {
3251 want_wlun = 0;
3252 lun_cnt = n;
3253 }
3254 one_lun = (struct scsi_lun *) &arr[8];
3255 max_addr = arr + SDEBUG_RLUN_ARR_SZ;
3256 for (i = 0, lun = (scsi_debug_no_lun_0 ? 1 : 0);
3257 ((i < lun_cnt) && ((unsigned char *)(one_lun + i) < max_addr));
3258 i++, lun++) {
3259 upper = (lun >> 8) & 0x3f;
3260 if (upper)
3261 one_lun[i].scsi_lun[0] =
3262 (upper | (SAM2_LUN_ADDRESS_METHOD << 6));
3263 one_lun[i].scsi_lun[1] = lun & 0xff;
3264 }
3265 if (want_wlun) {
3266 one_lun[i].scsi_lun[0] = (SAM2_WLUN_REPORT_LUNS >> 8) & 0xff;
3267 one_lun[i].scsi_lun[1] = SAM2_WLUN_REPORT_LUNS & 0xff;
3268 i++;
3269 }
3270 alloc_len = (unsigned char *)(one_lun + i) - arr;
3271 return fill_from_dev_buffer(scp, arr,
3272 min((int)alloc_len, SDEBUG_RLUN_ARR_SZ));
3273 }
3274
3275 static int resp_xdwriteread(struct scsi_cmnd *scp, unsigned long long lba,
3276 unsigned int num, struct sdebug_dev_info *devip)
3277 {
3278 int j;
3279 unsigned char *kaddr, *buf;
3280 unsigned int offset;
3281 struct scsi_data_buffer *sdb = scsi_in(scp);
3282 struct sg_mapping_iter miter;
3283
3284 /* better not to use temporary buffer. */
3285 buf = kmalloc(scsi_bufflen(scp), GFP_ATOMIC);
3286 if (!buf) {
3287 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
3288 INSUFF_RES_ASCQ);
3289 return check_condition_result;
3290 }
3291
3292 scsi_sg_copy_to_buffer(scp, buf, scsi_bufflen(scp));
3293
3294 offset = 0;
3295 sg_miter_start(&miter, sdb->table.sgl, sdb->table.nents,
3296 SG_MITER_ATOMIC | SG_MITER_TO_SG);
3297
3298 while (sg_miter_next(&miter)) {
3299 kaddr = miter.addr;
3300 for (j = 0; j < miter.length; j++)
3301 *(kaddr + j) ^= *(buf + offset + j);
3302
3303 offset += miter.length;
3304 }
3305 sg_miter_stop(&miter);
3306 kfree(buf);
3307
3308 return 0;
3309 }
3310
3311 static int
3312 resp_xdwriteread_10(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
3313 {
3314 u8 *cmd = scp->cmnd;
3315 u64 lba;
3316 u32 num;
3317 int errsts;
3318
3319 if (!scsi_bidi_cmnd(scp)) {
3320 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
3321 INSUFF_RES_ASCQ);
3322 return check_condition_result;
3323 }
3324 errsts = resp_read_dt0(scp, devip);
3325 if (errsts)
3326 return errsts;
3327 if (!(cmd[1] & 0x4)) { /* DISABLE_WRITE is not set */
3328 errsts = resp_write_dt0(scp, devip);
3329 if (errsts)
3330 return errsts;
3331 }
3332 lba = get_unaligned_be32(cmd + 2);
3333 num = get_unaligned_be16(cmd + 7);
3334 return resp_xdwriteread(scp, lba, num, devip);
3335 }
3336
3337 /* When timer or tasklet goes off this function is called. */
3338 static void sdebug_q_cmd_complete(unsigned long indx)
3339 {
3340 int qa_indx;
3341 int retiring = 0;
3342 unsigned long iflags;
3343 struct sdebug_queued_cmd *sqcp;
3344 struct scsi_cmnd *scp;
3345 struct sdebug_dev_info *devip;
3346
3347 atomic_inc(&sdebug_completions);
3348 qa_indx = indx;
3349 if ((qa_indx < 0) || (qa_indx >= SCSI_DEBUG_CANQUEUE)) {
3350 pr_err("%s: wild qa_indx=%d\n", __func__, qa_indx);
3351 return;
3352 }
3353 spin_lock_irqsave(&queued_arr_lock, iflags);
3354 sqcp = &queued_arr[qa_indx];
3355 scp = sqcp->a_cmnd;
3356 if (NULL == scp) {
3357 spin_unlock_irqrestore(&queued_arr_lock, iflags);
3358 pr_err("%s: scp is NULL\n", __func__);
3359 return;
3360 }
3361 devip = (struct sdebug_dev_info *)scp->device->hostdata;
3362 if (devip)
3363 atomic_dec(&devip->num_in_q);
3364 else
3365 pr_err("%s: devip=NULL\n", __func__);
3366 if (atomic_read(&retired_max_queue) > 0)
3367 retiring = 1;
3368
3369 sqcp->a_cmnd = NULL;
3370 if (!test_and_clear_bit(qa_indx, queued_in_use_bm)) {
3371 spin_unlock_irqrestore(&queued_arr_lock, iflags);
3372 pr_err("%s: Unexpected completion\n", __func__);
3373 return;
3374 }
3375
3376 if (unlikely(retiring)) { /* user has reduced max_queue */
3377 int k, retval;
3378
3379 retval = atomic_read(&retired_max_queue);
3380 if (qa_indx >= retval) {
3381 spin_unlock_irqrestore(&queued_arr_lock, iflags);
3382 pr_err("%s: index %d too large\n", __func__, retval);
3383 return;
3384 }
3385 k = find_last_bit(queued_in_use_bm, retval);
3386 if ((k < scsi_debug_max_queue) || (k == retval))
3387 atomic_set(&retired_max_queue, 0);
3388 else
3389 atomic_set(&retired_max_queue, k + 1);
3390 }
3391 spin_unlock_irqrestore(&queued_arr_lock, iflags);
3392 scp->scsi_done(scp); /* callback to mid level */
3393 }
3394
3395 /* When high resolution timer goes off this function is called. */
3396 static enum hrtimer_restart
3397 sdebug_q_cmd_hrt_complete(struct hrtimer *timer)
3398 {
3399 int qa_indx;
3400 int retiring = 0;
3401 unsigned long iflags;
3402 struct sdebug_hrtimer *sd_hrtp = (struct sdebug_hrtimer *)timer;
3403 struct sdebug_queued_cmd *sqcp;
3404 struct scsi_cmnd *scp;
3405 struct sdebug_dev_info *devip;
3406
3407 atomic_inc(&sdebug_completions);
3408 qa_indx = sd_hrtp->qa_indx;
3409 if ((qa_indx < 0) || (qa_indx >= SCSI_DEBUG_CANQUEUE)) {
3410 pr_err("%s: wild qa_indx=%d\n", __func__, qa_indx);
3411 goto the_end;
3412 }
3413 spin_lock_irqsave(&queued_arr_lock, iflags);
3414 sqcp = &queued_arr[qa_indx];
3415 scp = sqcp->a_cmnd;
3416 if (NULL == scp) {
3417 spin_unlock_irqrestore(&queued_arr_lock, iflags);
3418 pr_err("%s: scp is NULL\n", __func__);
3419 goto the_end;
3420 }
3421 devip = (struct sdebug_dev_info *)scp->device->hostdata;
3422 if (devip)
3423 atomic_dec(&devip->num_in_q);
3424 else
3425 pr_err("%s: devip=NULL\n", __func__);
3426 if (atomic_read(&retired_max_queue) > 0)
3427 retiring = 1;
3428
3429 sqcp->a_cmnd = NULL;
3430 if (!test_and_clear_bit(qa_indx, queued_in_use_bm)) {
3431 spin_unlock_irqrestore(&queued_arr_lock, iflags);
3432 pr_err("%s: Unexpected completion\n", __func__);
3433 goto the_end;
3434 }
3435
3436 if (unlikely(retiring)) { /* user has reduced max_queue */
3437 int k, retval;
3438
3439 retval = atomic_read(&retired_max_queue);
3440 if (qa_indx >= retval) {
3441 spin_unlock_irqrestore(&queued_arr_lock, iflags);
3442 pr_err("%s: index %d too large\n", __func__, retval);
3443 goto the_end;
3444 }
3445 k = find_last_bit(queued_in_use_bm, retval);
3446 if ((k < scsi_debug_max_queue) || (k == retval))
3447 atomic_set(&retired_max_queue, 0);
3448 else
3449 atomic_set(&retired_max_queue, k + 1);
3450 }
3451 spin_unlock_irqrestore(&queued_arr_lock, iflags);
3452 scp->scsi_done(scp); /* callback to mid level */
3453 the_end:
3454 return HRTIMER_NORESTART;
3455 }
3456
3457 static struct sdebug_dev_info *
3458 sdebug_device_create(struct sdebug_host_info *sdbg_host, gfp_t flags)
3459 {
3460 struct sdebug_dev_info *devip;
3461
3462 devip = kzalloc(sizeof(*devip), flags);
3463 if (devip) {
3464 devip->sdbg_host = sdbg_host;
3465 list_add_tail(&devip->dev_list, &sdbg_host->dev_info_list);
3466 }
3467 return devip;
3468 }
3469
3470 static struct sdebug_dev_info * devInfoReg(struct scsi_device * sdev)
3471 {
3472 struct sdebug_host_info * sdbg_host;
3473 struct sdebug_dev_info * open_devip = NULL;
3474 struct sdebug_dev_info * devip =
3475 (struct sdebug_dev_info *)sdev->hostdata;
3476
3477 if (devip)
3478 return devip;
3479 sdbg_host = *(struct sdebug_host_info **)shost_priv(sdev->host);
3480 if (!sdbg_host) {
3481 pr_err("%s: Host info NULL\n", __func__);
3482 return NULL;
3483 }
3484 list_for_each_entry(devip, &sdbg_host->dev_info_list, dev_list) {
3485 if ((devip->used) && (devip->channel == sdev->channel) &&
3486 (devip->target == sdev->id) &&
3487 (devip->lun == sdev->lun))
3488 return devip;
3489 else {
3490 if ((!devip->used) && (!open_devip))
3491 open_devip = devip;
3492 }
3493 }
3494 if (!open_devip) { /* try and make a new one */
3495 open_devip = sdebug_device_create(sdbg_host, GFP_ATOMIC);
3496 if (!open_devip) {
3497 printk(KERN_ERR "%s: out of memory at line %d\n",
3498 __func__, __LINE__);
3499 return NULL;
3500 }
3501 }
3502
3503 open_devip->channel = sdev->channel;
3504 open_devip->target = sdev->id;
3505 open_devip->lun = sdev->lun;
3506 open_devip->sdbg_host = sdbg_host;
3507 atomic_set(&open_devip->num_in_q, 0);
3508 set_bit(SDEBUG_UA_POR, open_devip->uas_bm);
3509 open_devip->used = true;
3510 return open_devip;
3511 }
3512
3513 static int scsi_debug_slave_alloc(struct scsi_device *sdp)
3514 {
3515 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
3516 printk(KERN_INFO "scsi_debug: slave_alloc <%u %u %u %llu>\n",
3517 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
3518 queue_flag_set_unlocked(QUEUE_FLAG_BIDI, sdp->request_queue);
3519 return 0;
3520 }
3521
3522 static int scsi_debug_slave_configure(struct scsi_device *sdp)
3523 {
3524 struct sdebug_dev_info *devip;
3525
3526 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
3527 printk(KERN_INFO "scsi_debug: slave_configure <%u %u %u %llu>\n",
3528 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
3529 if (sdp->host->max_cmd_len != SCSI_DEBUG_MAX_CMD_LEN)
3530 sdp->host->max_cmd_len = SCSI_DEBUG_MAX_CMD_LEN;
3531 devip = devInfoReg(sdp);
3532 if (NULL == devip)
3533 return 1; /* no resources, will be marked offline */
3534 sdp->hostdata = devip;
3535 blk_queue_max_segment_size(sdp->request_queue, -1U);
3536 if (scsi_debug_no_uld)
3537 sdp->no_uld_attach = 1;
3538 return 0;
3539 }
3540
3541 static void scsi_debug_slave_destroy(struct scsi_device *sdp)
3542 {
3543 struct sdebug_dev_info *devip =
3544 (struct sdebug_dev_info *)sdp->hostdata;
3545
3546 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
3547 printk(KERN_INFO "scsi_debug: slave_destroy <%u %u %u %llu>\n",
3548 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
3549 if (devip) {
3550 /* make this slot available for re-use */
3551 devip->used = false;
3552 sdp->hostdata = NULL;
3553 }
3554 }
3555
3556 /* Returns 1 if cmnd found (deletes its timer or tasklet), else returns 0 */
3557 static int stop_queued_cmnd(struct scsi_cmnd *cmnd)
3558 {
3559 unsigned long iflags;
3560 int k, qmax, r_qmax;
3561 struct sdebug_queued_cmd *sqcp;
3562 struct sdebug_dev_info *devip;
3563
3564 spin_lock_irqsave(&queued_arr_lock, iflags);
3565 qmax = scsi_debug_max_queue;
3566 r_qmax = atomic_read(&retired_max_queue);
3567 if (r_qmax > qmax)
3568 qmax = r_qmax;
3569 for (k = 0; k < qmax; ++k) {
3570 if (test_bit(k, queued_in_use_bm)) {
3571 sqcp = &queued_arr[k];
3572 if (cmnd == sqcp->a_cmnd) {
3573 devip = (struct sdebug_dev_info *)
3574 cmnd->device->hostdata;
3575 if (devip)
3576 atomic_dec(&devip->num_in_q);
3577 sqcp->a_cmnd = NULL;
3578 spin_unlock_irqrestore(&queued_arr_lock,
3579 iflags);
3580 if (scsi_debug_ndelay > 0) {
3581 if (sqcp->sd_hrtp)
3582 hrtimer_cancel(
3583 &sqcp->sd_hrtp->hrt);
3584 } else if (scsi_debug_delay > 0) {
3585 if (sqcp->cmnd_timerp)
3586 del_timer_sync(
3587 sqcp->cmnd_timerp);
3588 } else if (scsi_debug_delay < 0) {
3589 if (sqcp->tletp)
3590 tasklet_kill(sqcp->tletp);
3591 }
3592 clear_bit(k, queued_in_use_bm);
3593 return 1;
3594 }
3595 }
3596 }
3597 spin_unlock_irqrestore(&queued_arr_lock, iflags);
3598 return 0;
3599 }
3600
3601 /* Deletes (stops) timers or tasklets of all queued commands */
3602 static void stop_all_queued(void)
3603 {
3604 unsigned long iflags;
3605 int k;
3606 struct sdebug_queued_cmd *sqcp;
3607 struct sdebug_dev_info *devip;
3608
3609 spin_lock_irqsave(&queued_arr_lock, iflags);
3610 for (k = 0; k < SCSI_DEBUG_CANQUEUE; ++k) {
3611 if (test_bit(k, queued_in_use_bm)) {
3612 sqcp = &queued_arr[k];
3613 if (sqcp->a_cmnd) {
3614 devip = (struct sdebug_dev_info *)
3615 sqcp->a_cmnd->device->hostdata;
3616 if (devip)
3617 atomic_dec(&devip->num_in_q);
3618 sqcp->a_cmnd = NULL;
3619 spin_unlock_irqrestore(&queued_arr_lock,
3620 iflags);
3621 if (scsi_debug_ndelay > 0) {
3622 if (sqcp->sd_hrtp)
3623 hrtimer_cancel(
3624 &sqcp->sd_hrtp->hrt);
3625 } else if (scsi_debug_delay > 0) {
3626 if (sqcp->cmnd_timerp)
3627 del_timer_sync(
3628 sqcp->cmnd_timerp);
3629 } else if (scsi_debug_delay < 0) {
3630 if (sqcp->tletp)
3631 tasklet_kill(sqcp->tletp);
3632 }
3633 clear_bit(k, queued_in_use_bm);
3634 spin_lock_irqsave(&queued_arr_lock, iflags);
3635 }
3636 }
3637 }
3638 spin_unlock_irqrestore(&queued_arr_lock, iflags);
3639 }
3640
3641 /* Free queued command memory on heap */
3642 static void free_all_queued(void)
3643 {
3644 unsigned long iflags;
3645 int k;
3646 struct sdebug_queued_cmd *sqcp;
3647
3648 spin_lock_irqsave(&queued_arr_lock, iflags);
3649 for (k = 0; k < SCSI_DEBUG_CANQUEUE; ++k) {
3650 sqcp = &queued_arr[k];
3651 kfree(sqcp->cmnd_timerp);
3652 sqcp->cmnd_timerp = NULL;
3653 kfree(sqcp->tletp);
3654 sqcp->tletp = NULL;
3655 kfree(sqcp->sd_hrtp);
3656 sqcp->sd_hrtp = NULL;
3657 }
3658 spin_unlock_irqrestore(&queued_arr_lock, iflags);
3659 }
3660
3661 static int scsi_debug_abort(struct scsi_cmnd *SCpnt)
3662 {
3663 ++num_aborts;
3664 if (SCpnt) {
3665 if (SCpnt->device &&
3666 (SCSI_DEBUG_OPT_ALL_NOISE & scsi_debug_opts))
3667 sdev_printk(KERN_INFO, SCpnt->device, "%s\n",
3668 __func__);
3669 stop_queued_cmnd(SCpnt);
3670 }
3671 return SUCCESS;
3672 }
3673
3674 static int scsi_debug_device_reset(struct scsi_cmnd * SCpnt)
3675 {
3676 struct sdebug_dev_info * devip;
3677
3678 ++num_dev_resets;
3679 if (SCpnt && SCpnt->device) {
3680 struct scsi_device *sdp = SCpnt->device;
3681
3682 if (SCSI_DEBUG_OPT_ALL_NOISE & scsi_debug_opts)
3683 sdev_printk(KERN_INFO, sdp, "%s\n", __func__);
3684 devip = devInfoReg(sdp);
3685 if (devip)
3686 set_bit(SDEBUG_UA_POR, devip->uas_bm);
3687 }
3688 return SUCCESS;
3689 }
3690
3691 static int scsi_debug_target_reset(struct scsi_cmnd *SCpnt)
3692 {
3693 struct sdebug_host_info *sdbg_host;
3694 struct sdebug_dev_info *devip;
3695 struct scsi_device *sdp;
3696 struct Scsi_Host *hp;
3697 int k = 0;
3698
3699 ++num_target_resets;
3700 if (!SCpnt)
3701 goto lie;
3702 sdp = SCpnt->device;
3703 if (!sdp)
3704 goto lie;
3705 if (SCSI_DEBUG_OPT_ALL_NOISE & scsi_debug_opts)
3706 sdev_printk(KERN_INFO, sdp, "%s\n", __func__);
3707 hp = sdp->host;
3708 if (!hp)
3709 goto lie;
3710 sdbg_host = *(struct sdebug_host_info **)shost_priv(hp);
3711 if (sdbg_host) {
3712 list_for_each_entry(devip,
3713 &sdbg_host->dev_info_list,
3714 dev_list)
3715 if (devip->target == sdp->id) {
3716 set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm);
3717 ++k;
3718 }
3719 }
3720 if (SCSI_DEBUG_OPT_RESET_NOISE & scsi_debug_opts)
3721 sdev_printk(KERN_INFO, sdp,
3722 "%s: %d device(s) found in target\n", __func__, k);
3723 lie:
3724 return SUCCESS;
3725 }
3726
3727 static int scsi_debug_bus_reset(struct scsi_cmnd * SCpnt)
3728 {
3729 struct sdebug_host_info *sdbg_host;
3730 struct sdebug_dev_info *devip;
3731 struct scsi_device * sdp;
3732 struct Scsi_Host * hp;
3733 int k = 0;
3734
3735 ++num_bus_resets;
3736 if (!(SCpnt && SCpnt->device))
3737 goto lie;
3738 sdp = SCpnt->device;
3739 if (SCSI_DEBUG_OPT_ALL_NOISE & scsi_debug_opts)
3740 sdev_printk(KERN_INFO, sdp, "%s\n", __func__);
3741 hp = sdp->host;
3742 if (hp) {
3743 sdbg_host = *(struct sdebug_host_info **)shost_priv(hp);
3744 if (sdbg_host) {
3745 list_for_each_entry(devip,
3746 &sdbg_host->dev_info_list,
3747 dev_list) {
3748 set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm);
3749 ++k;
3750 }
3751 }
3752 }
3753 if (SCSI_DEBUG_OPT_RESET_NOISE & scsi_debug_opts)
3754 sdev_printk(KERN_INFO, sdp,
3755 "%s: %d device(s) found in host\n", __func__, k);
3756 lie:
3757 return SUCCESS;
3758 }
3759
3760 static int scsi_debug_host_reset(struct scsi_cmnd * SCpnt)
3761 {
3762 struct sdebug_host_info * sdbg_host;
3763 struct sdebug_dev_info *devip;
3764 int k = 0;
3765
3766 ++num_host_resets;
3767 if ((SCpnt->device) && (SCSI_DEBUG_OPT_ALL_NOISE & scsi_debug_opts))
3768 sdev_printk(KERN_INFO, SCpnt->device, "%s\n", __func__);
3769 spin_lock(&sdebug_host_list_lock);
3770 list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) {
3771 list_for_each_entry(devip, &sdbg_host->dev_info_list,
3772 dev_list) {
3773 set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm);
3774 ++k;
3775 }
3776 }
3777 spin_unlock(&sdebug_host_list_lock);
3778 stop_all_queued();
3779 if (SCSI_DEBUG_OPT_RESET_NOISE & scsi_debug_opts)
3780 sdev_printk(KERN_INFO, SCpnt->device,
3781 "%s: %d device(s) found\n", __func__, k);
3782 return SUCCESS;
3783 }
3784
3785 static void __init sdebug_build_parts(unsigned char *ramp,
3786 unsigned long store_size)
3787 {
3788 struct partition * pp;
3789 int starts[SDEBUG_MAX_PARTS + 2];
3790 int sectors_per_part, num_sectors, k;
3791 int heads_by_sects, start_sec, end_sec;
3792
3793 /* assume partition table already zeroed */
3794 if ((scsi_debug_num_parts < 1) || (store_size < 1048576))
3795 return;
3796 if (scsi_debug_num_parts > SDEBUG_MAX_PARTS) {
3797 scsi_debug_num_parts = SDEBUG_MAX_PARTS;
3798 pr_warn("%s: reducing partitions to %d\n", __func__,
3799 SDEBUG_MAX_PARTS);
3800 }
3801 num_sectors = (int)sdebug_store_sectors;
3802 sectors_per_part = (num_sectors - sdebug_sectors_per)
3803 / scsi_debug_num_parts;
3804 heads_by_sects = sdebug_heads * sdebug_sectors_per;
3805 starts[0] = sdebug_sectors_per;
3806 for (k = 1; k < scsi_debug_num_parts; ++k)
3807 starts[k] = ((k * sectors_per_part) / heads_by_sects)
3808 * heads_by_sects;
3809 starts[scsi_debug_num_parts] = num_sectors;
3810 starts[scsi_debug_num_parts + 1] = 0;
3811
3812 ramp[510] = 0x55; /* magic partition markings */
3813 ramp[511] = 0xAA;
3814 pp = (struct partition *)(ramp + 0x1be);
3815 for (k = 0; starts[k + 1]; ++k, ++pp) {
3816 start_sec = starts[k];
3817 end_sec = starts[k + 1] - 1;
3818 pp->boot_ind = 0;
3819
3820 pp->cyl = start_sec / heads_by_sects;
3821 pp->head = (start_sec - (pp->cyl * heads_by_sects))
3822 / sdebug_sectors_per;
3823 pp->sector = (start_sec % sdebug_sectors_per) + 1;
3824
3825 pp->end_cyl = end_sec / heads_by_sects;
3826 pp->end_head = (end_sec - (pp->end_cyl * heads_by_sects))
3827 / sdebug_sectors_per;
3828 pp->end_sector = (end_sec % sdebug_sectors_per) + 1;
3829
3830 pp->start_sect = cpu_to_le32(start_sec);
3831 pp->nr_sects = cpu_to_le32(end_sec - start_sec + 1);
3832 pp->sys_ind = 0x83; /* plain Linux partition */
3833 }
3834 }
3835
3836 static int
3837 schedule_resp(struct scsi_cmnd *cmnd, struct sdebug_dev_info *devip,
3838 int scsi_result, int delta_jiff)
3839 {
3840 unsigned long iflags;
3841 int k, num_in_q, qdepth, inject;
3842 struct sdebug_queued_cmd *sqcp = NULL;
3843 struct scsi_device *sdp = cmnd->device;
3844
3845 if (NULL == cmnd || NULL == devip) {
3846 pr_warn("%s: called with NULL cmnd or devip pointer\n",
3847 __func__);
3848 /* no particularly good error to report back */
3849 return SCSI_MLQUEUE_HOST_BUSY;
3850 }
3851 if ((scsi_result) && (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts))
3852 sdev_printk(KERN_INFO, sdp, "%s: non-zero result=0x%x\n",
3853 __func__, scsi_result);
3854 if (delta_jiff == 0)
3855 goto respond_in_thread;
3856
3857 /* schedule the response at a later time if resources permit */
3858 spin_lock_irqsave(&queued_arr_lock, iflags);
3859 num_in_q = atomic_read(&devip->num_in_q);
3860 qdepth = cmnd->device->queue_depth;
3861 inject = 0;
3862 if ((qdepth > 0) && (num_in_q >= qdepth)) {
3863 if (scsi_result) {
3864 spin_unlock_irqrestore(&queued_arr_lock, iflags);
3865 goto respond_in_thread;
3866 } else
3867 scsi_result = device_qfull_result;
3868 } else if ((scsi_debug_every_nth != 0) &&
3869 (SCSI_DEBUG_OPT_RARE_TSF & scsi_debug_opts) &&
3870 (scsi_result == 0)) {
3871 if ((num_in_q == (qdepth - 1)) &&
3872 (atomic_inc_return(&sdebug_a_tsf) >=
3873 abs(scsi_debug_every_nth))) {
3874 atomic_set(&sdebug_a_tsf, 0);
3875 inject = 1;
3876 scsi_result = device_qfull_result;
3877 }
3878 }
3879
3880 k = find_first_zero_bit(queued_in_use_bm, scsi_debug_max_queue);
3881 if (k >= scsi_debug_max_queue) {
3882 spin_unlock_irqrestore(&queued_arr_lock, iflags);
3883 if (scsi_result)
3884 goto respond_in_thread;
3885 else if (SCSI_DEBUG_OPT_ALL_TSF & scsi_debug_opts)
3886 scsi_result = device_qfull_result;
3887 if (SCSI_DEBUG_OPT_Q_NOISE & scsi_debug_opts)
3888 sdev_printk(KERN_INFO, sdp,
3889 "%s: max_queue=%d exceeded, %s\n",
3890 __func__, scsi_debug_max_queue,
3891 (scsi_result ? "status: TASK SET FULL" :
3892 "report: host busy"));
3893 if (scsi_result)
3894 goto respond_in_thread;
3895 else
3896 return SCSI_MLQUEUE_HOST_BUSY;
3897 }
3898 __set_bit(k, queued_in_use_bm);
3899 atomic_inc(&devip->num_in_q);
3900 sqcp = &queued_arr[k];
3901 sqcp->a_cmnd = cmnd;
3902 cmnd->result = scsi_result;
3903 spin_unlock_irqrestore(&queued_arr_lock, iflags);
3904 if (delta_jiff > 0) {
3905 if (NULL == sqcp->cmnd_timerp) {
3906 sqcp->cmnd_timerp = kmalloc(sizeof(struct timer_list),
3907 GFP_ATOMIC);
3908 if (NULL == sqcp->cmnd_timerp)
3909 return SCSI_MLQUEUE_HOST_BUSY;
3910 init_timer(sqcp->cmnd_timerp);
3911 }
3912 sqcp->cmnd_timerp->function = sdebug_q_cmd_complete;
3913 sqcp->cmnd_timerp->data = k;
3914 sqcp->cmnd_timerp->expires = get_jiffies_64() + delta_jiff;
3915 add_timer(sqcp->cmnd_timerp);
3916 } else if (scsi_debug_ndelay > 0) {
3917 ktime_t kt = ktime_set(0, scsi_debug_ndelay);
3918 struct sdebug_hrtimer *sd_hp = sqcp->sd_hrtp;
3919
3920 if (NULL == sd_hp) {
3921 sd_hp = kmalloc(sizeof(*sd_hp), GFP_ATOMIC);
3922 if (NULL == sd_hp)
3923 return SCSI_MLQUEUE_HOST_BUSY;
3924 sqcp->sd_hrtp = sd_hp;
3925 hrtimer_init(&sd_hp->hrt, CLOCK_MONOTONIC,
3926 HRTIMER_MODE_REL);
3927 sd_hp->hrt.function = sdebug_q_cmd_hrt_complete;
3928 sd_hp->qa_indx = k;
3929 }
3930 hrtimer_start(&sd_hp->hrt, kt, HRTIMER_MODE_REL);
3931 } else { /* delay < 0 */
3932 if (NULL == sqcp->tletp) {
3933 sqcp->tletp = kmalloc(sizeof(*sqcp->tletp),
3934 GFP_ATOMIC);
3935 if (NULL == sqcp->tletp)
3936 return SCSI_MLQUEUE_HOST_BUSY;
3937 tasklet_init(sqcp->tletp,
3938 sdebug_q_cmd_complete, k);
3939 }
3940 if (-1 == delta_jiff)
3941 tasklet_hi_schedule(sqcp->tletp);
3942 else
3943 tasklet_schedule(sqcp->tletp);
3944 }
3945 if ((SCSI_DEBUG_OPT_Q_NOISE & scsi_debug_opts) &&
3946 (scsi_result == device_qfull_result))
3947 sdev_printk(KERN_INFO, sdp,
3948 "%s: num_in_q=%d +1, %s%s\n", __func__,
3949 num_in_q, (inject ? "<inject> " : ""),
3950 "status: TASK SET FULL");
3951 return 0;
3952
3953 respond_in_thread: /* call back to mid-layer using invocation thread */
3954 cmnd->result = scsi_result;
3955 cmnd->scsi_done(cmnd);
3956 return 0;
3957 }
3958
3959 /* Note: The following macros create attribute files in the
3960 /sys/module/scsi_debug/parameters directory. Unfortunately this
3961 driver is unaware of a change and cannot trigger auxiliary actions
3962 as it can when the corresponding attribute in the
3963 /sys/bus/pseudo/drivers/scsi_debug directory is changed.
3964 */
3965 module_param_named(add_host, scsi_debug_add_host, int, S_IRUGO | S_IWUSR);
3966 module_param_named(ato, scsi_debug_ato, int, S_IRUGO);
3967 module_param_named(clustering, scsi_debug_clustering, bool, S_IRUGO | S_IWUSR);
3968 module_param_named(delay, scsi_debug_delay, int, S_IRUGO | S_IWUSR);
3969 module_param_named(dev_size_mb, scsi_debug_dev_size_mb, int, S_IRUGO);
3970 module_param_named(dif, scsi_debug_dif, int, S_IRUGO);
3971 module_param_named(dix, scsi_debug_dix, int, S_IRUGO);
3972 module_param_named(dsense, scsi_debug_dsense, int, S_IRUGO | S_IWUSR);
3973 module_param_named(every_nth, scsi_debug_every_nth, int, S_IRUGO | S_IWUSR);
3974 module_param_named(fake_rw, scsi_debug_fake_rw, int, S_IRUGO | S_IWUSR);
3975 module_param_named(guard, scsi_debug_guard, uint, S_IRUGO);
3976 module_param_named(host_lock, scsi_debug_host_lock, bool, S_IRUGO | S_IWUSR);
3977 module_param_named(lbpu, scsi_debug_lbpu, int, S_IRUGO);
3978 module_param_named(lbpws, scsi_debug_lbpws, int, S_IRUGO);
3979 module_param_named(lbpws10, scsi_debug_lbpws10, int, S_IRUGO);
3980 module_param_named(lbprz, scsi_debug_lbprz, int, S_IRUGO);
3981 module_param_named(lowest_aligned, scsi_debug_lowest_aligned, int, S_IRUGO);
3982 module_param_named(max_luns, scsi_debug_max_luns, int, S_IRUGO | S_IWUSR);
3983 module_param_named(max_queue, scsi_debug_max_queue, int, S_IRUGO | S_IWUSR);
3984 module_param_named(ndelay, scsi_debug_ndelay, int, S_IRUGO | S_IWUSR);
3985 module_param_named(no_lun_0, scsi_debug_no_lun_0, int, S_IRUGO | S_IWUSR);
3986 module_param_named(no_uld, scsi_debug_no_uld, int, S_IRUGO);
3987 module_param_named(num_parts, scsi_debug_num_parts, int, S_IRUGO);
3988 module_param_named(num_tgts, scsi_debug_num_tgts, int, S_IRUGO | S_IWUSR);
3989 module_param_named(opt_blks, scsi_debug_opt_blks, int, S_IRUGO);
3990 module_param_named(opts, scsi_debug_opts, int, S_IRUGO | S_IWUSR);
3991 module_param_named(physblk_exp, scsi_debug_physblk_exp, int, S_IRUGO);
3992 module_param_named(ptype, scsi_debug_ptype, int, S_IRUGO | S_IWUSR);
3993 module_param_named(removable, scsi_debug_removable, bool, S_IRUGO | S_IWUSR);
3994 module_param_named(scsi_level, scsi_debug_scsi_level, int, S_IRUGO);
3995 module_param_named(sector_size, scsi_debug_sector_size, int, S_IRUGO);
3996 module_param_named(strict, scsi_debug_strict, bool, S_IRUGO | S_IWUSR);
3997 module_param_named(unmap_alignment, scsi_debug_unmap_alignment, int, S_IRUGO);
3998 module_param_named(unmap_granularity, scsi_debug_unmap_granularity, int, S_IRUGO);
3999 module_param_named(unmap_max_blocks, scsi_debug_unmap_max_blocks, int, S_IRUGO);
4000 module_param_named(unmap_max_desc, scsi_debug_unmap_max_desc, int, S_IRUGO);
4001 module_param_named(virtual_gb, scsi_debug_virtual_gb, int, S_IRUGO | S_IWUSR);
4002 module_param_named(vpd_use_hostno, scsi_debug_vpd_use_hostno, int,
4003 S_IRUGO | S_IWUSR);
4004 module_param_named(write_same_length, scsi_debug_write_same_length, int,
4005 S_IRUGO | S_IWUSR);
4006
4007 MODULE_AUTHOR("Eric Youngdale + Douglas Gilbert");
4008 MODULE_DESCRIPTION("SCSI debug adapter driver");
4009 MODULE_LICENSE("GPL");
4010 MODULE_VERSION(SCSI_DEBUG_VERSION);
4011
4012 MODULE_PARM_DESC(add_host, "0..127 hosts allowed(def=1)");
4013 MODULE_PARM_DESC(ato, "application tag ownership: 0=disk 1=host (def=1)");
4014 MODULE_PARM_DESC(clustering, "when set enables larger transfers (def=0)");
4015 MODULE_PARM_DESC(delay, "response delay (def=1 jiffy); 0:imm, -1,-2:tiny");
4016 MODULE_PARM_DESC(dev_size_mb, "size in MiB of ram shared by devs(def=8)");
4017 MODULE_PARM_DESC(dif, "data integrity field type: 0-3 (def=0)");
4018 MODULE_PARM_DESC(dix, "data integrity extensions mask (def=0)");
4019 MODULE_PARM_DESC(dsense, "use descriptor sense format(def=0 -> fixed)");
4020 MODULE_PARM_DESC(every_nth, "timeout every nth command(def=0)");
4021 MODULE_PARM_DESC(fake_rw, "fake reads/writes instead of copying (def=0)");
4022 MODULE_PARM_DESC(guard, "protection checksum: 0=crc, 1=ip (def=0)");
4023 MODULE_PARM_DESC(host_lock, "use host_lock around all commands (def=0)");
4024 MODULE_PARM_DESC(lbpu, "enable LBP, support UNMAP command (def=0)");
4025 MODULE_PARM_DESC(lbpws, "enable LBP, support WRITE SAME(16) with UNMAP bit (def=0)");
4026 MODULE_PARM_DESC(lbpws10, "enable LBP, support WRITE SAME(10) with UNMAP bit (def=0)");
4027 MODULE_PARM_DESC(lbprz, "unmapped blocks return 0 on read (def=1)");
4028 MODULE_PARM_DESC(lowest_aligned, "lowest aligned lba (def=0)");
4029 MODULE_PARM_DESC(max_luns, "number of LUNs per target to simulate(def=1)");
4030 MODULE_PARM_DESC(max_queue, "max number of queued commands (1 to max(def))");
4031 MODULE_PARM_DESC(ndelay, "response delay in nanoseconds (def=0 -> ignore)");
4032 MODULE_PARM_DESC(no_lun_0, "no LU number 0 (def=0 -> have lun 0)");
4033 MODULE_PARM_DESC(no_uld, "stop ULD (e.g. sd driver) attaching (def=0))");
4034 MODULE_PARM_DESC(num_parts, "number of partitions(def=0)");
4035 MODULE_PARM_DESC(num_tgts, "number of targets per host to simulate(def=1)");
4036 MODULE_PARM_DESC(opt_blks, "optimal transfer length in block (def=64)");
4037 MODULE_PARM_DESC(opts, "1->noise, 2->medium_err, 4->timeout, 8->recovered_err... (def=0)");
4038 MODULE_PARM_DESC(physblk_exp, "physical block exponent (def=0)");
4039 MODULE_PARM_DESC(ptype, "SCSI peripheral type(def=0[disk])");
4040 MODULE_PARM_DESC(removable, "claim to have removable media (def=0)");
4041 MODULE_PARM_DESC(scsi_level, "SCSI level to simulate(def=6[SPC-4])");
4042 MODULE_PARM_DESC(sector_size, "logical block size in bytes (def=512)");
4043 MODULE_PARM_DESC(strict, "stricter checks: reserved field in cdb (def=0)");
4044 MODULE_PARM_DESC(unmap_alignment, "lowest aligned thin provisioning lba (def=0)");
4045 MODULE_PARM_DESC(unmap_granularity, "thin provisioning granularity in blocks (def=1)");
4046 MODULE_PARM_DESC(unmap_max_blocks, "max # of blocks can be unmapped in one cmd (def=0xffffffff)");
4047 MODULE_PARM_DESC(unmap_max_desc, "max # of ranges that can be unmapped in one cmd (def=256)");
4048 MODULE_PARM_DESC(virtual_gb, "virtual gigabyte (GiB) size (def=0 -> use dev_size_mb)");
4049 MODULE_PARM_DESC(vpd_use_hostno, "0 -> dev ids ignore hostno (def=1 -> unique dev ids)");
4050 MODULE_PARM_DESC(write_same_length, "Maximum blocks per WRITE SAME cmd (def=0xffff)");
4051
4052 static char sdebug_info[256];
4053
4054 static const char * scsi_debug_info(struct Scsi_Host * shp)
4055 {
4056 sprintf(sdebug_info, "scsi_debug, version %s [%s], "
4057 "dev_size_mb=%d, opts=0x%x", SCSI_DEBUG_VERSION,
4058 scsi_debug_version_date, scsi_debug_dev_size_mb,
4059 scsi_debug_opts);
4060 return sdebug_info;
4061 }
4062
4063 /* 'echo <val> > /proc/scsi/scsi_debug/<host_id>' writes to opts */
4064 static int scsi_debug_write_info(struct Scsi_Host *host, char *buffer, int length)
4065 {
4066 char arr[16];
4067 int opts;
4068 int minLen = length > 15 ? 15 : length;
4069
4070 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
4071 return -EACCES;
4072 memcpy(arr, buffer, minLen);
4073 arr[minLen] = '\0';
4074 if (1 != sscanf(arr, "%d", &opts))
4075 return -EINVAL;
4076 scsi_debug_opts = opts;
4077 if (scsi_debug_every_nth != 0)
4078 atomic_set(&sdebug_cmnd_count, 0);
4079 return length;
4080 }
4081
4082 /* Output seen with 'cat /proc/scsi/scsi_debug/<host_id>'. It will be the
4083 * same for each scsi_debug host (if more than one). Some of the counters
4084 * output are not atomics so might be inaccurate in a busy system. */
4085 static int scsi_debug_show_info(struct seq_file *m, struct Scsi_Host *host)
4086 {
4087 int f, l;
4088 char b[32];
4089
4090 if (scsi_debug_every_nth > 0)
4091 snprintf(b, sizeof(b), " (curr:%d)",
4092 ((SCSI_DEBUG_OPT_RARE_TSF & scsi_debug_opts) ?
4093 atomic_read(&sdebug_a_tsf) :
4094 atomic_read(&sdebug_cmnd_count)));
4095 else
4096 b[0] = '\0';
4097
4098 seq_printf(m, "scsi_debug adapter driver, version %s [%s]\n"
4099 "num_tgts=%d, shared (ram) size=%d MB, opts=0x%x, "
4100 "every_nth=%d%s\n"
4101 "delay=%d, ndelay=%d, max_luns=%d, q_completions=%d\n"
4102 "sector_size=%d bytes, cylinders=%d, heads=%d, sectors=%d\n"
4103 "command aborts=%d; RESETs: device=%d, target=%d, bus=%d, "
4104 "host=%d\ndix_reads=%d dix_writes=%d dif_errors=%d "
4105 "usec_in_jiffy=%lu\n",
4106 SCSI_DEBUG_VERSION, scsi_debug_version_date,
4107 scsi_debug_num_tgts, scsi_debug_dev_size_mb, scsi_debug_opts,
4108 scsi_debug_every_nth, b, scsi_debug_delay, scsi_debug_ndelay,
4109 scsi_debug_max_luns, atomic_read(&sdebug_completions),
4110 scsi_debug_sector_size, sdebug_cylinders_per, sdebug_heads,
4111 sdebug_sectors_per, num_aborts, num_dev_resets,
4112 num_target_resets, num_bus_resets, num_host_resets,
4113 dix_reads, dix_writes, dif_errors, TICK_NSEC / 1000);
4114
4115 f = find_first_bit(queued_in_use_bm, scsi_debug_max_queue);
4116 if (f != scsi_debug_max_queue) {
4117 l = find_last_bit(queued_in_use_bm, scsi_debug_max_queue);
4118 seq_printf(m, " %s BUSY: first,last bits set: %d,%d\n",
4119 "queued_in_use_bm", f, l);
4120 }
4121 return 0;
4122 }
4123
4124 static ssize_t delay_show(struct device_driver *ddp, char *buf)
4125 {
4126 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_delay);
4127 }
4128 /* Returns -EBUSY if delay is being changed and commands are queued */
4129 static ssize_t delay_store(struct device_driver *ddp, const char *buf,
4130 size_t count)
4131 {
4132 int delay, res;
4133
4134 if ((count > 0) && (1 == sscanf(buf, "%d", &delay))) {
4135 res = count;
4136 if (scsi_debug_delay != delay) {
4137 unsigned long iflags;
4138 int k;
4139
4140 spin_lock_irqsave(&queued_arr_lock, iflags);
4141 k = find_first_bit(queued_in_use_bm,
4142 scsi_debug_max_queue);
4143 if (k != scsi_debug_max_queue)
4144 res = -EBUSY; /* have queued commands */
4145 else {
4146 scsi_debug_delay = delay;
4147 scsi_debug_ndelay = 0;
4148 }
4149 spin_unlock_irqrestore(&queued_arr_lock, iflags);
4150 }
4151 return res;
4152 }
4153 return -EINVAL;
4154 }
4155 static DRIVER_ATTR_RW(delay);
4156
4157 static ssize_t ndelay_show(struct device_driver *ddp, char *buf)
4158 {
4159 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_ndelay);
4160 }
4161 /* Returns -EBUSY if ndelay is being changed and commands are queued */
4162 /* If > 0 and accepted then scsi_debug_delay is set to DELAY_OVERRIDDEN */
4163 static ssize_t ndelay_store(struct device_driver *ddp, const char *buf,
4164 size_t count)
4165 {
4166 unsigned long iflags;
4167 int ndelay, res, k;
4168
4169 if ((count > 0) && (1 == sscanf(buf, "%d", &ndelay)) &&
4170 (ndelay >= 0) && (ndelay < 1000000000)) {
4171 res = count;
4172 if (scsi_debug_ndelay != ndelay) {
4173 spin_lock_irqsave(&queued_arr_lock, iflags);
4174 k = find_first_bit(queued_in_use_bm,
4175 scsi_debug_max_queue);
4176 if (k != scsi_debug_max_queue)
4177 res = -EBUSY; /* have queued commands */
4178 else {
4179 scsi_debug_ndelay = ndelay;
4180 scsi_debug_delay = ndelay ? DELAY_OVERRIDDEN
4181 : DEF_DELAY;
4182 }
4183 spin_unlock_irqrestore(&queued_arr_lock, iflags);
4184 }
4185 return res;
4186 }
4187 return -EINVAL;
4188 }
4189 static DRIVER_ATTR_RW(ndelay);
4190
4191 static ssize_t opts_show(struct device_driver *ddp, char *buf)
4192 {
4193 return scnprintf(buf, PAGE_SIZE, "0x%x\n", scsi_debug_opts);
4194 }
4195
4196 static ssize_t opts_store(struct device_driver *ddp, const char *buf,
4197 size_t count)
4198 {
4199 int opts;
4200 char work[20];
4201
4202 if (1 == sscanf(buf, "%10s", work)) {
4203 if (0 == strncasecmp(work,"0x", 2)) {
4204 if (1 == sscanf(&work[2], "%x", &opts))
4205 goto opts_done;
4206 } else {
4207 if (1 == sscanf(work, "%d", &opts))
4208 goto opts_done;
4209 }
4210 }
4211 return -EINVAL;
4212 opts_done:
4213 scsi_debug_opts = opts;
4214 if (SCSI_DEBUG_OPT_RECOVERED_ERR & opts)
4215 sdebug_any_injecting_opt = true;
4216 else if (SCSI_DEBUG_OPT_TRANSPORT_ERR & opts)
4217 sdebug_any_injecting_opt = true;
4218 else if (SCSI_DEBUG_OPT_DIF_ERR & opts)
4219 sdebug_any_injecting_opt = true;
4220 else if (SCSI_DEBUG_OPT_DIX_ERR & opts)
4221 sdebug_any_injecting_opt = true;
4222 else if (SCSI_DEBUG_OPT_SHORT_TRANSFER & opts)
4223 sdebug_any_injecting_opt = true;
4224 atomic_set(&sdebug_cmnd_count, 0);
4225 atomic_set(&sdebug_a_tsf, 0);
4226 return count;
4227 }
4228 static DRIVER_ATTR_RW(opts);
4229
4230 static ssize_t ptype_show(struct device_driver *ddp, char *buf)
4231 {
4232 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_ptype);
4233 }
4234 static ssize_t ptype_store(struct device_driver *ddp, const char *buf,
4235 size_t count)
4236 {
4237 int n;
4238
4239 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
4240 scsi_debug_ptype = n;
4241 return count;
4242 }
4243 return -EINVAL;
4244 }
4245 static DRIVER_ATTR_RW(ptype);
4246
4247 static ssize_t dsense_show(struct device_driver *ddp, char *buf)
4248 {
4249 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dsense);
4250 }
4251 static ssize_t dsense_store(struct device_driver *ddp, const char *buf,
4252 size_t count)
4253 {
4254 int n;
4255
4256 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
4257 scsi_debug_dsense = n;
4258 return count;
4259 }
4260 return -EINVAL;
4261 }
4262 static DRIVER_ATTR_RW(dsense);
4263
4264 static ssize_t fake_rw_show(struct device_driver *ddp, char *buf)
4265 {
4266 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_fake_rw);
4267 }
4268 static ssize_t fake_rw_store(struct device_driver *ddp, const char *buf,
4269 size_t count)
4270 {
4271 int n;
4272
4273 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
4274 n = (n > 0);
4275 scsi_debug_fake_rw = (scsi_debug_fake_rw > 0);
4276 if (scsi_debug_fake_rw != n) {
4277 if ((0 == n) && (NULL == fake_storep)) {
4278 unsigned long sz =
4279 (unsigned long)scsi_debug_dev_size_mb *
4280 1048576;
4281
4282 fake_storep = vmalloc(sz);
4283 if (NULL == fake_storep) {
4284 pr_err("%s: out of memory, 9\n",
4285 __func__);
4286 return -ENOMEM;
4287 }
4288 memset(fake_storep, 0, sz);
4289 }
4290 scsi_debug_fake_rw = n;
4291 }
4292 return count;
4293 }
4294 return -EINVAL;
4295 }
4296 static DRIVER_ATTR_RW(fake_rw);
4297
4298 static ssize_t no_lun_0_show(struct device_driver *ddp, char *buf)
4299 {
4300 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_no_lun_0);
4301 }
4302 static ssize_t no_lun_0_store(struct device_driver *ddp, const char *buf,
4303 size_t count)
4304 {
4305 int n;
4306
4307 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
4308 scsi_debug_no_lun_0 = n;
4309 return count;
4310 }
4311 return -EINVAL;
4312 }
4313 static DRIVER_ATTR_RW(no_lun_0);
4314
4315 static ssize_t num_tgts_show(struct device_driver *ddp, char *buf)
4316 {
4317 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_num_tgts);
4318 }
4319 static ssize_t num_tgts_store(struct device_driver *ddp, const char *buf,
4320 size_t count)
4321 {
4322 int n;
4323
4324 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
4325 scsi_debug_num_tgts = n;
4326 sdebug_max_tgts_luns();
4327 return count;
4328 }
4329 return -EINVAL;
4330 }
4331 static DRIVER_ATTR_RW(num_tgts);
4332
4333 static ssize_t dev_size_mb_show(struct device_driver *ddp, char *buf)
4334 {
4335 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dev_size_mb);
4336 }
4337 static DRIVER_ATTR_RO(dev_size_mb);
4338
4339 static ssize_t num_parts_show(struct device_driver *ddp, char *buf)
4340 {
4341 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_num_parts);
4342 }
4343 static DRIVER_ATTR_RO(num_parts);
4344
4345 static ssize_t every_nth_show(struct device_driver *ddp, char *buf)
4346 {
4347 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_every_nth);
4348 }
4349 static ssize_t every_nth_store(struct device_driver *ddp, const char *buf,
4350 size_t count)
4351 {
4352 int nth;
4353
4354 if ((count > 0) && (1 == sscanf(buf, "%d", &nth))) {
4355 scsi_debug_every_nth = nth;
4356 atomic_set(&sdebug_cmnd_count, 0);
4357 return count;
4358 }
4359 return -EINVAL;
4360 }
4361 static DRIVER_ATTR_RW(every_nth);
4362
4363 static ssize_t max_luns_show(struct device_driver *ddp, char *buf)
4364 {
4365 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_max_luns);
4366 }
4367 static ssize_t max_luns_store(struct device_driver *ddp, const char *buf,
4368 size_t count)
4369 {
4370 int n;
4371
4372 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
4373 scsi_debug_max_luns = n;
4374 sdebug_max_tgts_luns();
4375 return count;
4376 }
4377 return -EINVAL;
4378 }
4379 static DRIVER_ATTR_RW(max_luns);
4380
4381 static ssize_t max_queue_show(struct device_driver *ddp, char *buf)
4382 {
4383 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_max_queue);
4384 }
4385 /* N.B. max_queue can be changed while there are queued commands. In flight
4386 * commands beyond the new max_queue will be completed. */
4387 static ssize_t max_queue_store(struct device_driver *ddp, const char *buf,
4388 size_t count)
4389 {
4390 unsigned long iflags;
4391 int n, k;
4392
4393 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n > 0) &&
4394 (n <= SCSI_DEBUG_CANQUEUE)) {
4395 spin_lock_irqsave(&queued_arr_lock, iflags);
4396 k = find_last_bit(queued_in_use_bm, SCSI_DEBUG_CANQUEUE);
4397 scsi_debug_max_queue = n;
4398 if (SCSI_DEBUG_CANQUEUE == k)
4399 atomic_set(&retired_max_queue, 0);
4400 else if (k >= n)
4401 atomic_set(&retired_max_queue, k + 1);
4402 else
4403 atomic_set(&retired_max_queue, 0);
4404 spin_unlock_irqrestore(&queued_arr_lock, iflags);
4405 return count;
4406 }
4407 return -EINVAL;
4408 }
4409 static DRIVER_ATTR_RW(max_queue);
4410
4411 static ssize_t no_uld_show(struct device_driver *ddp, char *buf)
4412 {
4413 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_no_uld);
4414 }
4415 static DRIVER_ATTR_RO(no_uld);
4416
4417 static ssize_t scsi_level_show(struct device_driver *ddp, char *buf)
4418 {
4419 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_scsi_level);
4420 }
4421 static DRIVER_ATTR_RO(scsi_level);
4422
4423 static ssize_t virtual_gb_show(struct device_driver *ddp, char *buf)
4424 {
4425 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_virtual_gb);
4426 }
4427 static ssize_t virtual_gb_store(struct device_driver *ddp, const char *buf,
4428 size_t count)
4429 {
4430 int n;
4431 bool changed;
4432
4433 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
4434 changed = (scsi_debug_virtual_gb != n);
4435 scsi_debug_virtual_gb = n;
4436 sdebug_capacity = get_sdebug_capacity();
4437 if (changed) {
4438 struct sdebug_host_info *sdhp;
4439 struct sdebug_dev_info *dp;
4440
4441 list_for_each_entry(sdhp, &sdebug_host_list,
4442 host_list) {
4443 list_for_each_entry(dp, &sdhp->dev_info_list,
4444 dev_list) {
4445 set_bit(SDEBUG_UA_CAPACITY_CHANGED,
4446 dp->uas_bm);
4447 }
4448 }
4449 }
4450 return count;
4451 }
4452 return -EINVAL;
4453 }
4454 static DRIVER_ATTR_RW(virtual_gb);
4455
4456 static ssize_t add_host_show(struct device_driver *ddp, char *buf)
4457 {
4458 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_add_host);
4459 }
4460
4461 static ssize_t add_host_store(struct device_driver *ddp, const char *buf,
4462 size_t count)
4463 {
4464 int delta_hosts;
4465
4466 if (sscanf(buf, "%d", &delta_hosts) != 1)
4467 return -EINVAL;
4468 if (delta_hosts > 0) {
4469 do {
4470 sdebug_add_adapter();
4471 } while (--delta_hosts);
4472 } else if (delta_hosts < 0) {
4473 do {
4474 sdebug_remove_adapter();
4475 } while (++delta_hosts);
4476 }
4477 return count;
4478 }
4479 static DRIVER_ATTR_RW(add_host);
4480
4481 static ssize_t vpd_use_hostno_show(struct device_driver *ddp, char *buf)
4482 {
4483 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_vpd_use_hostno);
4484 }
4485 static ssize_t vpd_use_hostno_store(struct device_driver *ddp, const char *buf,
4486 size_t count)
4487 {
4488 int n;
4489
4490 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
4491 scsi_debug_vpd_use_hostno = n;
4492 return count;
4493 }
4494 return -EINVAL;
4495 }
4496 static DRIVER_ATTR_RW(vpd_use_hostno);
4497
4498 static ssize_t sector_size_show(struct device_driver *ddp, char *buf)
4499 {
4500 return scnprintf(buf, PAGE_SIZE, "%u\n", scsi_debug_sector_size);
4501 }
4502 static DRIVER_ATTR_RO(sector_size);
4503
4504 static ssize_t dix_show(struct device_driver *ddp, char *buf)
4505 {
4506 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dix);
4507 }
4508 static DRIVER_ATTR_RO(dix);
4509
4510 static ssize_t dif_show(struct device_driver *ddp, char *buf)
4511 {
4512 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dif);
4513 }
4514 static DRIVER_ATTR_RO(dif);
4515
4516 static ssize_t guard_show(struct device_driver *ddp, char *buf)
4517 {
4518 return scnprintf(buf, PAGE_SIZE, "%u\n", scsi_debug_guard);
4519 }
4520 static DRIVER_ATTR_RO(guard);
4521
4522 static ssize_t ato_show(struct device_driver *ddp, char *buf)
4523 {
4524 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_ato);
4525 }
4526 static DRIVER_ATTR_RO(ato);
4527
4528 static ssize_t map_show(struct device_driver *ddp, char *buf)
4529 {
4530 ssize_t count;
4531
4532 if (!scsi_debug_lbp())
4533 return scnprintf(buf, PAGE_SIZE, "0-%u\n",
4534 sdebug_store_sectors);
4535
4536 count = bitmap_scnlistprintf(buf, PAGE_SIZE, map_storep, map_size);
4537
4538 buf[count++] = '\n';
4539 buf[count++] = 0;
4540
4541 return count;
4542 }
4543 static DRIVER_ATTR_RO(map);
4544
4545 static ssize_t removable_show(struct device_driver *ddp, char *buf)
4546 {
4547 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_removable ? 1 : 0);
4548 }
4549 static ssize_t removable_store(struct device_driver *ddp, const char *buf,
4550 size_t count)
4551 {
4552 int n;
4553
4554 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
4555 scsi_debug_removable = (n > 0);
4556 return count;
4557 }
4558 return -EINVAL;
4559 }
4560 static DRIVER_ATTR_RW(removable);
4561
4562 static ssize_t host_lock_show(struct device_driver *ddp, char *buf)
4563 {
4564 return scnprintf(buf, PAGE_SIZE, "%d\n", !!scsi_debug_host_lock);
4565 }
4566 /* Returns -EBUSY if host_lock is being changed and commands are queued */
4567 static ssize_t host_lock_store(struct device_driver *ddp, const char *buf,
4568 size_t count)
4569 {
4570 int n, res;
4571
4572 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
4573 bool new_host_lock = (n > 0);
4574
4575 res = count;
4576 if (new_host_lock != scsi_debug_host_lock) {
4577 unsigned long iflags;
4578 int k;
4579
4580 spin_lock_irqsave(&queued_arr_lock, iflags);
4581 k = find_first_bit(queued_in_use_bm,
4582 scsi_debug_max_queue);
4583 if (k != scsi_debug_max_queue)
4584 res = -EBUSY; /* have queued commands */
4585 else
4586 scsi_debug_host_lock = new_host_lock;
4587 spin_unlock_irqrestore(&queued_arr_lock, iflags);
4588 }
4589 return res;
4590 }
4591 return -EINVAL;
4592 }
4593 static DRIVER_ATTR_RW(host_lock);
4594
4595 static ssize_t strict_show(struct device_driver *ddp, char *buf)
4596 {
4597 return scnprintf(buf, PAGE_SIZE, "%d\n", !!scsi_debug_strict);
4598 }
4599 static ssize_t strict_store(struct device_driver *ddp, const char *buf,
4600 size_t count)
4601 {
4602 int n;
4603
4604 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
4605 scsi_debug_strict = (n > 0);
4606 return count;
4607 }
4608 return -EINVAL;
4609 }
4610 static DRIVER_ATTR_RW(strict);
4611
4612
4613 /* Note: The following array creates attribute files in the
4614 /sys/bus/pseudo/drivers/scsi_debug directory. The advantage of these
4615 files (over those found in the /sys/module/scsi_debug/parameters
4616 directory) is that auxiliary actions can be triggered when an attribute
4617 is changed. For example see: sdebug_add_host_store() above.
4618 */
4619
4620 static struct attribute *sdebug_drv_attrs[] = {
4621 &driver_attr_delay.attr,
4622 &driver_attr_opts.attr,
4623 &driver_attr_ptype.attr,
4624 &driver_attr_dsense.attr,
4625 &driver_attr_fake_rw.attr,
4626 &driver_attr_no_lun_0.attr,
4627 &driver_attr_num_tgts.attr,
4628 &driver_attr_dev_size_mb.attr,
4629 &driver_attr_num_parts.attr,
4630 &driver_attr_every_nth.attr,
4631 &driver_attr_max_luns.attr,
4632 &driver_attr_max_queue.attr,
4633 &driver_attr_no_uld.attr,
4634 &driver_attr_scsi_level.attr,
4635 &driver_attr_virtual_gb.attr,
4636 &driver_attr_add_host.attr,
4637 &driver_attr_vpd_use_hostno.attr,
4638 &driver_attr_sector_size.attr,
4639 &driver_attr_dix.attr,
4640 &driver_attr_dif.attr,
4641 &driver_attr_guard.attr,
4642 &driver_attr_ato.attr,
4643 &driver_attr_map.attr,
4644 &driver_attr_removable.attr,
4645 &driver_attr_host_lock.attr,
4646 &driver_attr_ndelay.attr,
4647 &driver_attr_strict.attr,
4648 NULL,
4649 };
4650 ATTRIBUTE_GROUPS(sdebug_drv);
4651
4652 static struct device *pseudo_primary;
4653
4654 static int __init scsi_debug_init(void)
4655 {
4656 unsigned long sz;
4657 int host_to_add;
4658 int k;
4659 int ret;
4660
4661 atomic_set(&sdebug_cmnd_count, 0);
4662 atomic_set(&sdebug_completions, 0);
4663 atomic_set(&retired_max_queue, 0);
4664
4665 if (scsi_debug_ndelay >= 1000000000) {
4666 pr_warn("%s: ndelay must be less than 1 second, ignored\n",
4667 __func__);
4668 scsi_debug_ndelay = 0;
4669 } else if (scsi_debug_ndelay > 0)
4670 scsi_debug_delay = DELAY_OVERRIDDEN;
4671
4672 switch (scsi_debug_sector_size) {
4673 case 512:
4674 case 1024:
4675 case 2048:
4676 case 4096:
4677 break;
4678 default:
4679 pr_err("%s: invalid sector_size %d\n", __func__,
4680 scsi_debug_sector_size);
4681 return -EINVAL;
4682 }
4683
4684 switch (scsi_debug_dif) {
4685
4686 case SD_DIF_TYPE0_PROTECTION:
4687 case SD_DIF_TYPE1_PROTECTION:
4688 case SD_DIF_TYPE2_PROTECTION:
4689 case SD_DIF_TYPE3_PROTECTION:
4690 break;
4691
4692 default:
4693 pr_err("%s: dif must be 0, 1, 2 or 3\n", __func__);
4694 return -EINVAL;
4695 }
4696
4697 if (scsi_debug_guard > 1) {
4698 pr_err("%s: guard must be 0 or 1\n", __func__);
4699 return -EINVAL;
4700 }
4701
4702 if (scsi_debug_ato > 1) {
4703 pr_err("%s: ato must be 0 or 1\n", __func__);
4704 return -EINVAL;
4705 }
4706
4707 if (scsi_debug_physblk_exp > 15) {
4708 pr_err("%s: invalid physblk_exp %u\n", __func__,
4709 scsi_debug_physblk_exp);
4710 return -EINVAL;
4711 }
4712
4713 if (scsi_debug_lowest_aligned > 0x3fff) {
4714 pr_err("%s: lowest_aligned too big: %u\n", __func__,
4715 scsi_debug_lowest_aligned);
4716 return -EINVAL;
4717 }
4718
4719 if (scsi_debug_dev_size_mb < 1)
4720 scsi_debug_dev_size_mb = 1; /* force minimum 1 MB ramdisk */
4721 sz = (unsigned long)scsi_debug_dev_size_mb * 1048576;
4722 sdebug_store_sectors = sz / scsi_debug_sector_size;
4723 sdebug_capacity = get_sdebug_capacity();
4724
4725 /* play around with geometry, don't waste too much on track 0 */
4726 sdebug_heads = 8;
4727 sdebug_sectors_per = 32;
4728 if (scsi_debug_dev_size_mb >= 16)
4729 sdebug_heads = 32;
4730 else if (scsi_debug_dev_size_mb >= 256)
4731 sdebug_heads = 64;
4732 sdebug_cylinders_per = (unsigned long)sdebug_capacity /
4733 (sdebug_sectors_per * sdebug_heads);
4734 if (sdebug_cylinders_per >= 1024) {
4735 /* other LLDs do this; implies >= 1GB ram disk ... */
4736 sdebug_heads = 255;
4737 sdebug_sectors_per = 63;
4738 sdebug_cylinders_per = (unsigned long)sdebug_capacity /
4739 (sdebug_sectors_per * sdebug_heads);
4740 }
4741
4742 if (0 == scsi_debug_fake_rw) {
4743 fake_storep = vmalloc(sz);
4744 if (NULL == fake_storep) {
4745 pr_err("%s: out of memory, 1\n", __func__);
4746 return -ENOMEM;
4747 }
4748 memset(fake_storep, 0, sz);
4749 if (scsi_debug_num_parts > 0)
4750 sdebug_build_parts(fake_storep, sz);
4751 }
4752
4753 if (scsi_debug_dix) {
4754 int dif_size;
4755
4756 dif_size = sdebug_store_sectors * sizeof(struct sd_dif_tuple);
4757 dif_storep = vmalloc(dif_size);
4758
4759 pr_err("%s: dif_storep %u bytes @ %p\n", __func__, dif_size,
4760 dif_storep);
4761
4762 if (dif_storep == NULL) {
4763 pr_err("%s: out of mem. (DIX)\n", __func__);
4764 ret = -ENOMEM;
4765 goto free_vm;
4766 }
4767
4768 memset(dif_storep, 0xff, dif_size);
4769 }
4770
4771 /* Logical Block Provisioning */
4772 if (scsi_debug_lbp()) {
4773 scsi_debug_unmap_max_blocks =
4774 clamp(scsi_debug_unmap_max_blocks, 0U, 0xffffffffU);
4775
4776 scsi_debug_unmap_max_desc =
4777 clamp(scsi_debug_unmap_max_desc, 0U, 256U);
4778
4779 scsi_debug_unmap_granularity =
4780 clamp(scsi_debug_unmap_granularity, 1U, 0xffffffffU);
4781
4782 if (scsi_debug_unmap_alignment &&
4783 scsi_debug_unmap_granularity <=
4784 scsi_debug_unmap_alignment) {
4785 pr_err("%s: ERR: unmap_granularity <= unmap_alignment\n",
4786 __func__);
4787 return -EINVAL;
4788 }
4789
4790 map_size = lba_to_map_index(sdebug_store_sectors - 1) + 1;
4791 map_storep = vmalloc(BITS_TO_LONGS(map_size) * sizeof(long));
4792
4793 pr_info("%s: %lu provisioning blocks\n", __func__, map_size);
4794
4795 if (map_storep == NULL) {
4796 pr_err("%s: out of mem. (MAP)\n", __func__);
4797 ret = -ENOMEM;
4798 goto free_vm;
4799 }
4800
4801 bitmap_zero(map_storep, map_size);
4802
4803 /* Map first 1KB for partition table */
4804 if (scsi_debug_num_parts)
4805 map_region(0, 2);
4806 }
4807
4808 pseudo_primary = root_device_register("pseudo_0");
4809 if (IS_ERR(pseudo_primary)) {
4810 pr_warn("%s: root_device_register() error\n", __func__);
4811 ret = PTR_ERR(pseudo_primary);
4812 goto free_vm;
4813 }
4814 ret = bus_register(&pseudo_lld_bus);
4815 if (ret < 0) {
4816 pr_warn("%s: bus_register error: %d\n", __func__, ret);
4817 goto dev_unreg;
4818 }
4819 ret = driver_register(&sdebug_driverfs_driver);
4820 if (ret < 0) {
4821 pr_warn("%s: driver_register error: %d\n", __func__, ret);
4822 goto bus_unreg;
4823 }
4824
4825 host_to_add = scsi_debug_add_host;
4826 scsi_debug_add_host = 0;
4827
4828 for (k = 0; k < host_to_add; k++) {
4829 if (sdebug_add_adapter()) {
4830 pr_err("%s: sdebug_add_adapter failed k=%d\n",
4831 __func__, k);
4832 break;
4833 }
4834 }
4835
4836 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) {
4837 pr_info("%s: built %d host(s)\n", __func__,
4838 scsi_debug_add_host);
4839 }
4840 return 0;
4841
4842 bus_unreg:
4843 bus_unregister(&pseudo_lld_bus);
4844 dev_unreg:
4845 root_device_unregister(pseudo_primary);
4846 free_vm:
4847 if (map_storep)
4848 vfree(map_storep);
4849 if (dif_storep)
4850 vfree(dif_storep);
4851 vfree(fake_storep);
4852
4853 return ret;
4854 }
4855
4856 static void __exit scsi_debug_exit(void)
4857 {
4858 int k = scsi_debug_add_host;
4859
4860 stop_all_queued();
4861 free_all_queued();
4862 for (; k; k--)
4863 sdebug_remove_adapter();
4864 driver_unregister(&sdebug_driverfs_driver);
4865 bus_unregister(&pseudo_lld_bus);
4866 root_device_unregister(pseudo_primary);
4867
4868 if (dif_storep)
4869 vfree(dif_storep);
4870
4871 vfree(fake_storep);
4872 }
4873
4874 device_initcall(scsi_debug_init);
4875 module_exit(scsi_debug_exit);
4876
4877 static void sdebug_release_adapter(struct device * dev)
4878 {
4879 struct sdebug_host_info *sdbg_host;
4880
4881 sdbg_host = to_sdebug_host(dev);
4882 kfree(sdbg_host);
4883 }
4884
4885 static int sdebug_add_adapter(void)
4886 {
4887 int k, devs_per_host;
4888 int error = 0;
4889 struct sdebug_host_info *sdbg_host;
4890 struct sdebug_dev_info *sdbg_devinfo, *tmp;
4891
4892 sdbg_host = kzalloc(sizeof(*sdbg_host),GFP_KERNEL);
4893 if (NULL == sdbg_host) {
4894 printk(KERN_ERR "%s: out of memory at line %d\n",
4895 __func__, __LINE__);
4896 return -ENOMEM;
4897 }
4898
4899 INIT_LIST_HEAD(&sdbg_host->dev_info_list);
4900
4901 devs_per_host = scsi_debug_num_tgts * scsi_debug_max_luns;
4902 for (k = 0; k < devs_per_host; k++) {
4903 sdbg_devinfo = sdebug_device_create(sdbg_host, GFP_KERNEL);
4904 if (!sdbg_devinfo) {
4905 printk(KERN_ERR "%s: out of memory at line %d\n",
4906 __func__, __LINE__);
4907 error = -ENOMEM;
4908 goto clean;
4909 }
4910 }
4911
4912 spin_lock(&sdebug_host_list_lock);
4913 list_add_tail(&sdbg_host->host_list, &sdebug_host_list);
4914 spin_unlock(&sdebug_host_list_lock);
4915
4916 sdbg_host->dev.bus = &pseudo_lld_bus;
4917 sdbg_host->dev.parent = pseudo_primary;
4918 sdbg_host->dev.release = &sdebug_release_adapter;
4919 dev_set_name(&sdbg_host->dev, "adapter%d", scsi_debug_add_host);
4920
4921 error = device_register(&sdbg_host->dev);
4922
4923 if (error)
4924 goto clean;
4925
4926 ++scsi_debug_add_host;
4927 return error;
4928
4929 clean:
4930 list_for_each_entry_safe(sdbg_devinfo, tmp, &sdbg_host->dev_info_list,
4931 dev_list) {
4932 list_del(&sdbg_devinfo->dev_list);
4933 kfree(sdbg_devinfo);
4934 }
4935
4936 kfree(sdbg_host);
4937 return error;
4938 }
4939
4940 static void sdebug_remove_adapter(void)
4941 {
4942 struct sdebug_host_info * sdbg_host = NULL;
4943
4944 spin_lock(&sdebug_host_list_lock);
4945 if (!list_empty(&sdebug_host_list)) {
4946 sdbg_host = list_entry(sdebug_host_list.prev,
4947 struct sdebug_host_info, host_list);
4948 list_del(&sdbg_host->host_list);
4949 }
4950 spin_unlock(&sdebug_host_list_lock);
4951
4952 if (!sdbg_host)
4953 return;
4954
4955 device_unregister(&sdbg_host->dev);
4956 --scsi_debug_add_host;
4957 }
4958
4959 static int
4960 sdebug_change_qdepth(struct scsi_device *sdev, int qdepth)
4961 {
4962 int num_in_q = 0;
4963 unsigned long iflags;
4964 struct sdebug_dev_info *devip;
4965
4966 spin_lock_irqsave(&queued_arr_lock, iflags);
4967 devip = (struct sdebug_dev_info *)sdev->hostdata;
4968 if (NULL == devip) {
4969 spin_unlock_irqrestore(&queued_arr_lock, iflags);
4970 return -ENODEV;
4971 }
4972 num_in_q = atomic_read(&devip->num_in_q);
4973 spin_unlock_irqrestore(&queued_arr_lock, iflags);
4974
4975 if (qdepth < 1)
4976 qdepth = 1;
4977 /* allow to exceed max host queued_arr elements for testing */
4978 if (qdepth > SCSI_DEBUG_CANQUEUE + 10)
4979 qdepth = SCSI_DEBUG_CANQUEUE + 10;
4980 scsi_change_queue_depth(sdev, qdepth);
4981
4982 if (SCSI_DEBUG_OPT_Q_NOISE & scsi_debug_opts) {
4983 sdev_printk(KERN_INFO, sdev,
4984 "%s: qdepth=%d, num_in_q=%d\n",
4985 __func__, qdepth, num_in_q);
4986 }
4987 return sdev->queue_depth;
4988 }
4989
4990 static int
4991 sdebug_change_qtype(struct scsi_device *sdev, int qtype)
4992 {
4993 qtype = scsi_change_queue_type(sdev, qtype);
4994 if (SCSI_DEBUG_OPT_Q_NOISE & scsi_debug_opts) {
4995 const char *cp;
4996
4997 switch (qtype) {
4998 case 0:
4999 cp = "untagged";
5000 break;
5001 case MSG_SIMPLE_TAG:
5002 cp = "simple tags";
5003 break;
5004 case MSG_ORDERED_TAG:
5005 cp = "ordered tags";
5006 break;
5007 default:
5008 cp = "unknown";
5009 break;
5010 }
5011 sdev_printk(KERN_INFO, sdev, "%s: to %s\n", __func__, cp);
5012 }
5013 return qtype;
5014 }
5015
5016 static int
5017 check_inject(struct scsi_cmnd *scp)
5018 {
5019 struct sdebug_scmd_extra_t *ep = scsi_cmd_priv(scp);
5020
5021 memset(ep, 0, sizeof(struct sdebug_scmd_extra_t));
5022
5023 if (atomic_inc_return(&sdebug_cmnd_count) >=
5024 abs(scsi_debug_every_nth)) {
5025 atomic_set(&sdebug_cmnd_count, 0);
5026 if (scsi_debug_every_nth < -1)
5027 scsi_debug_every_nth = -1;
5028 if (SCSI_DEBUG_OPT_TIMEOUT & scsi_debug_opts)
5029 return 1; /* ignore command causing timeout */
5030 else if (SCSI_DEBUG_OPT_MAC_TIMEOUT & scsi_debug_opts &&
5031 scsi_medium_access_command(scp))
5032 return 1; /* time out reads and writes */
5033 if (sdebug_any_injecting_opt) {
5034 int opts = scsi_debug_opts;
5035
5036 if (SCSI_DEBUG_OPT_RECOVERED_ERR & opts)
5037 ep->inj_recovered = true;
5038 else if (SCSI_DEBUG_OPT_TRANSPORT_ERR & opts)
5039 ep->inj_transport = true;
5040 else if (SCSI_DEBUG_OPT_DIF_ERR & opts)
5041 ep->inj_dif = true;
5042 else if (SCSI_DEBUG_OPT_DIX_ERR & opts)
5043 ep->inj_dix = true;
5044 else if (SCSI_DEBUG_OPT_SHORT_TRANSFER & opts)
5045 ep->inj_short = true;
5046 }
5047 }
5048 return 0;
5049 }
5050
5051 static int
5052 scsi_debug_queuecommand(struct scsi_cmnd *scp)
5053 {
5054 u8 sdeb_i;
5055 struct scsi_device *sdp = scp->device;
5056 const struct opcode_info_t *oip;
5057 const struct opcode_info_t *r_oip;
5058 struct sdebug_dev_info *devip;
5059 u8 *cmd = scp->cmnd;
5060 int (*r_pfp)(struct scsi_cmnd *, struct sdebug_dev_info *);
5061 int k, na;
5062 int errsts = 0;
5063 int errsts_no_connect = DID_NO_CONNECT << 16;
5064 u32 flags;
5065 u16 sa;
5066 u8 opcode = cmd[0];
5067 bool has_wlun_rl;
5068 bool debug = !!(SCSI_DEBUG_OPT_NOISE & scsi_debug_opts);
5069
5070 scsi_set_resid(scp, 0);
5071 if (debug && !(SCSI_DEBUG_OPT_NO_CDB_NOISE & scsi_debug_opts)) {
5072 char b[120];
5073 int n, len, sb;
5074
5075 len = scp->cmd_len;
5076 sb = (int)sizeof(b);
5077 if (len > 32)
5078 strcpy(b, "too long, over 32 bytes");
5079 else {
5080 for (k = 0, n = 0; k < len && n < sb; ++k)
5081 n += scnprintf(b + n, sb - n, "%02x ",
5082 (u32)cmd[k]);
5083 }
5084 sdev_printk(KERN_INFO, sdp, "%s: cmd %s\n", my_name, b);
5085 }
5086 has_wlun_rl = (sdp->lun == SAM2_WLUN_REPORT_LUNS);
5087 if ((sdp->lun >= scsi_debug_max_luns) && !has_wlun_rl)
5088 return schedule_resp(scp, NULL, errsts_no_connect, 0);
5089
5090 sdeb_i = opcode_ind_arr[opcode]; /* fully mapped */
5091 oip = &opcode_info_arr[sdeb_i]; /* safe if table consistent */
5092 devip = (struct sdebug_dev_info *)sdp->hostdata;
5093 if (!devip) {
5094 devip = devInfoReg(sdp);
5095 if (NULL == devip)
5096 return schedule_resp(scp, NULL, errsts_no_connect, 0);
5097 }
5098 na = oip->num_attached;
5099 r_pfp = oip->pfp;
5100 if (na) { /* multiple commands with this opcode */
5101 r_oip = oip;
5102 if (FF_SA & r_oip->flags) {
5103 if (F_SA_LOW & oip->flags)
5104 sa = 0x1f & cmd[1];
5105 else
5106 sa = get_unaligned_be16(cmd + 8);
5107 for (k = 0; k <= na; oip = r_oip->arrp + k++) {
5108 if (opcode == oip->opcode && sa == oip->sa)
5109 break;
5110 }
5111 } else { /* since no service action only check opcode */
5112 for (k = 0; k <= na; oip = r_oip->arrp + k++) {
5113 if (opcode == oip->opcode)
5114 break;
5115 }
5116 }
5117 if (k > na) {
5118 if (F_SA_LOW & r_oip->flags)
5119 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 4);
5120 else if (F_SA_HIGH & r_oip->flags)
5121 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 8, 7);
5122 else
5123 mk_sense_invalid_opcode(scp);
5124 goto check_cond;
5125 }
5126 } /* else (when na==0) we assume the oip is a match */
5127 flags = oip->flags;
5128 if (F_INV_OP & flags) {
5129 mk_sense_invalid_opcode(scp);
5130 goto check_cond;
5131 }
5132 if (has_wlun_rl && !(F_RL_WLUN_OK & flags)) {
5133 if (debug)
5134 sdev_printk(KERN_INFO, sdp, "scsi_debug: Opcode: "
5135 "0x%x not supported for wlun\n", opcode);
5136 mk_sense_invalid_opcode(scp);
5137 goto check_cond;
5138 }
5139 if (scsi_debug_strict) { /* check cdb against mask */
5140 u8 rem;
5141 int j;
5142
5143 for (k = 1; k < oip->len_mask[0] && k < 16; ++k) {
5144 rem = ~oip->len_mask[k] & cmd[k];
5145 if (rem) {
5146 for (j = 7; j >= 0; --j, rem <<= 1) {
5147 if (0x80 & rem)
5148 break;
5149 }
5150 mk_sense_invalid_fld(scp, SDEB_IN_CDB, k, j);
5151 goto check_cond;
5152 }
5153 }
5154 }
5155 if (!(F_SKIP_UA & flags) &&
5156 SDEBUG_NUM_UAS != find_first_bit(devip->uas_bm, SDEBUG_NUM_UAS)) {
5157 errsts = check_readiness(scp, UAS_ONLY, devip);
5158 if (errsts)
5159 goto check_cond;
5160 }
5161 if ((F_M_ACCESS & flags) && devip->stopped) {
5162 mk_sense_buffer(scp, NOT_READY, LOGICAL_UNIT_NOT_READY, 0x2);
5163 if (debug)
5164 sdev_printk(KERN_INFO, sdp, "%s reports: Not ready: "
5165 "%s\n", my_name, "initializing command "
5166 "required");
5167 errsts = check_condition_result;
5168 goto fini;
5169 }
5170 if (scsi_debug_fake_rw && (F_FAKE_RW & flags))
5171 goto fini;
5172 if (scsi_debug_every_nth) {
5173 if (check_inject(scp))
5174 return 0; /* ignore command: make trouble */
5175 }
5176 if (oip->pfp) /* if this command has a resp_* function, call it */
5177 errsts = oip->pfp(scp, devip);
5178 else if (r_pfp) /* if leaf function ptr NULL, try the root's */
5179 errsts = r_pfp(scp, devip);
5180
5181 fini:
5182 return schedule_resp(scp, devip, errsts,
5183 ((F_DELAY_OVERR & flags) ? 0 : scsi_debug_delay));
5184 check_cond:
5185 return schedule_resp(scp, devip, check_condition_result, 0);
5186 }
5187
5188 static int
5189 sdebug_queuecommand_lock_or_not(struct Scsi_Host *shost, struct scsi_cmnd *cmd)
5190 {
5191 if (scsi_debug_host_lock) {
5192 unsigned long iflags;
5193 int rc;
5194
5195 spin_lock_irqsave(shost->host_lock, iflags);
5196 rc = scsi_debug_queuecommand(cmd);
5197 spin_unlock_irqrestore(shost->host_lock, iflags);
5198 return rc;
5199 } else
5200 return scsi_debug_queuecommand(cmd);
5201 }
5202
5203 static struct scsi_host_template sdebug_driver_template = {
5204 .show_info = scsi_debug_show_info,
5205 .write_info = scsi_debug_write_info,
5206 .proc_name = sdebug_proc_name,
5207 .name = "SCSI DEBUG",
5208 .info = scsi_debug_info,
5209 .slave_alloc = scsi_debug_slave_alloc,
5210 .slave_configure = scsi_debug_slave_configure,
5211 .slave_destroy = scsi_debug_slave_destroy,
5212 .ioctl = scsi_debug_ioctl,
5213 .queuecommand = sdebug_queuecommand_lock_or_not,
5214 .change_queue_depth = sdebug_change_qdepth,
5215 .change_queue_type = sdebug_change_qtype,
5216 .eh_abort_handler = scsi_debug_abort,
5217 .eh_device_reset_handler = scsi_debug_device_reset,
5218 .eh_target_reset_handler = scsi_debug_target_reset,
5219 .eh_bus_reset_handler = scsi_debug_bus_reset,
5220 .eh_host_reset_handler = scsi_debug_host_reset,
5221 .can_queue = SCSI_DEBUG_CANQUEUE,
5222 .this_id = 7,
5223 .sg_tablesize = SCSI_MAX_SG_CHAIN_SEGMENTS,
5224 .cmd_per_lun = DEF_CMD_PER_LUN,
5225 .max_sectors = -1U,
5226 .use_clustering = DISABLE_CLUSTERING,
5227 .module = THIS_MODULE,
5228 .track_queue_depth = 1,
5229 .cmd_size = sizeof(struct sdebug_scmd_extra_t),
5230 };
5231
5232 static int sdebug_driver_probe(struct device * dev)
5233 {
5234 int error = 0;
5235 int opts;
5236 struct sdebug_host_info *sdbg_host;
5237 struct Scsi_Host *hpnt;
5238 int host_prot;
5239
5240 sdbg_host = to_sdebug_host(dev);
5241
5242 sdebug_driver_template.can_queue = scsi_debug_max_queue;
5243 if (scsi_debug_clustering)
5244 sdebug_driver_template.use_clustering = ENABLE_CLUSTERING;
5245 hpnt = scsi_host_alloc(&sdebug_driver_template, sizeof(sdbg_host));
5246 if (NULL == hpnt) {
5247 pr_err("%s: scsi_host_alloc failed\n", __func__);
5248 error = -ENODEV;
5249 return error;
5250 }
5251
5252 sdbg_host->shost = hpnt;
5253 *((struct sdebug_host_info **)hpnt->hostdata) = sdbg_host;
5254 if ((hpnt->this_id >= 0) && (scsi_debug_num_tgts > hpnt->this_id))
5255 hpnt->max_id = scsi_debug_num_tgts + 1;
5256 else
5257 hpnt->max_id = scsi_debug_num_tgts;
5258 hpnt->max_lun = SAM2_WLUN_REPORT_LUNS; /* = scsi_debug_max_luns; */
5259
5260 host_prot = 0;
5261
5262 switch (scsi_debug_dif) {
5263
5264 case SD_DIF_TYPE1_PROTECTION:
5265 host_prot = SHOST_DIF_TYPE1_PROTECTION;
5266 if (scsi_debug_dix)
5267 host_prot |= SHOST_DIX_TYPE1_PROTECTION;
5268 break;
5269
5270 case SD_DIF_TYPE2_PROTECTION:
5271 host_prot = SHOST_DIF_TYPE2_PROTECTION;
5272 if (scsi_debug_dix)
5273 host_prot |= SHOST_DIX_TYPE2_PROTECTION;
5274 break;
5275
5276 case SD_DIF_TYPE3_PROTECTION:
5277 host_prot = SHOST_DIF_TYPE3_PROTECTION;
5278 if (scsi_debug_dix)
5279 host_prot |= SHOST_DIX_TYPE3_PROTECTION;
5280 break;
5281
5282 default:
5283 if (scsi_debug_dix)
5284 host_prot |= SHOST_DIX_TYPE0_PROTECTION;
5285 break;
5286 }
5287
5288 scsi_host_set_prot(hpnt, host_prot);
5289
5290 printk(KERN_INFO "scsi_debug: host protection%s%s%s%s%s%s%s\n",
5291 (host_prot & SHOST_DIF_TYPE1_PROTECTION) ? " DIF1" : "",
5292 (host_prot & SHOST_DIF_TYPE2_PROTECTION) ? " DIF2" : "",
5293 (host_prot & SHOST_DIF_TYPE3_PROTECTION) ? " DIF3" : "",
5294 (host_prot & SHOST_DIX_TYPE0_PROTECTION) ? " DIX0" : "",
5295 (host_prot & SHOST_DIX_TYPE1_PROTECTION) ? " DIX1" : "",
5296 (host_prot & SHOST_DIX_TYPE2_PROTECTION) ? " DIX2" : "",
5297 (host_prot & SHOST_DIX_TYPE3_PROTECTION) ? " DIX3" : "");
5298
5299 if (scsi_debug_guard == 1)
5300 scsi_host_set_guard(hpnt, SHOST_DIX_GUARD_IP);
5301 else
5302 scsi_host_set_guard(hpnt, SHOST_DIX_GUARD_CRC);
5303
5304 opts = scsi_debug_opts;
5305 if (SCSI_DEBUG_OPT_RECOVERED_ERR & opts)
5306 sdebug_any_injecting_opt = true;
5307 else if (SCSI_DEBUG_OPT_TRANSPORT_ERR & opts)
5308 sdebug_any_injecting_opt = true;
5309 else if (SCSI_DEBUG_OPT_DIF_ERR & opts)
5310 sdebug_any_injecting_opt = true;
5311 else if (SCSI_DEBUG_OPT_DIX_ERR & opts)
5312 sdebug_any_injecting_opt = true;
5313 else if (SCSI_DEBUG_OPT_SHORT_TRANSFER & opts)
5314 sdebug_any_injecting_opt = true;
5315
5316 error = scsi_add_host(hpnt, &sdbg_host->dev);
5317 if (error) {
5318 printk(KERN_ERR "%s: scsi_add_host failed\n", __func__);
5319 error = -ENODEV;
5320 scsi_host_put(hpnt);
5321 } else
5322 scsi_scan_host(hpnt);
5323
5324 return error;
5325 }
5326
5327 static int sdebug_driver_remove(struct device * dev)
5328 {
5329 struct sdebug_host_info *sdbg_host;
5330 struct sdebug_dev_info *sdbg_devinfo, *tmp;
5331
5332 sdbg_host = to_sdebug_host(dev);
5333
5334 if (!sdbg_host) {
5335 printk(KERN_ERR "%s: Unable to locate host info\n",
5336 __func__);
5337 return -ENODEV;
5338 }
5339
5340 scsi_remove_host(sdbg_host->shost);
5341
5342 list_for_each_entry_safe(sdbg_devinfo, tmp, &sdbg_host->dev_info_list,
5343 dev_list) {
5344 list_del(&sdbg_devinfo->dev_list);
5345 kfree(sdbg_devinfo);
5346 }
5347
5348 scsi_host_put(sdbg_host->shost);
5349 return 0;
5350 }
5351
5352 static int pseudo_lld_bus_match(struct device *dev,
5353 struct device_driver *dev_driver)
5354 {
5355 return 1;
5356 }
5357
5358 static struct bus_type pseudo_lld_bus = {
5359 .name = "pseudo",
5360 .match = pseudo_lld_bus_match,
5361 .probe = sdebug_driver_probe,
5362 .remove = sdebug_driver_remove,
5363 .drv_groups = sdebug_drv_groups,
5364 };
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