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i40e: Implement ndo_features_check()
[deliverable/linux.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 TARGET_CHANGED_ASC 0x3f
84 #define LUNS_CHANGED_ASCQ 0x0e
85 #define INSUFF_RES_ASC 0x55
86 #define INSUFF_RES_ASCQ 0x3
87 #define POWER_ON_RESET_ASCQ 0x0
88 #define BUS_RESET_ASCQ 0x2 /* scsi bus reset occurred */
89 #define MODE_CHANGED_ASCQ 0x1 /* mode parameters changed */
90 #define CAPACITY_CHANGED_ASCQ 0x9
91 #define SAVING_PARAMS_UNSUP 0x39
92 #define TRANSPORT_PROBLEM 0x4b
93 #define THRESHOLD_EXCEEDED 0x5d
94 #define LOW_POWER_COND_ON 0x5e
95 #define MISCOMPARE_VERIFY_ASC 0x1d
96 #define MICROCODE_CHANGED_ASCQ 0x1 /* with TARGET_CHANGED_ASC */
97 #define MICROCODE_CHANGED_WO_RESET_ASCQ 0x16
98
99 /* Additional Sense Code Qualifier (ASCQ) */
100 #define ACK_NAK_TO 0x3
101
102
103 /* Default values for driver parameters */
104 #define DEF_NUM_HOST 1
105 #define DEF_NUM_TGTS 1
106 #define DEF_MAX_LUNS 1
107 /* With these defaults, this driver will make 1 host with 1 target
108 * (id 0) containing 1 logical unit (lun 0). That is 1 device.
109 */
110 #define DEF_ATO 1
111 #define DEF_DELAY 1 /* if > 0 unit is a jiffy */
112 #define DEF_DEV_SIZE_MB 8
113 #define DEF_DIF 0
114 #define DEF_DIX 0
115 #define DEF_D_SENSE 0
116 #define DEF_EVERY_NTH 0
117 #define DEF_FAKE_RW 0
118 #define DEF_GUARD 0
119 #define DEF_HOST_LOCK 0
120 #define DEF_LBPU 0
121 #define DEF_LBPWS 0
122 #define DEF_LBPWS10 0
123 #define DEF_LBPRZ 1
124 #define DEF_LOWEST_ALIGNED 0
125 #define DEF_NDELAY 0 /* if > 0 unit is a nanosecond */
126 #define DEF_NO_LUN_0 0
127 #define DEF_NUM_PARTS 0
128 #define DEF_OPTS 0
129 #define DEF_OPT_BLKS 64
130 #define DEF_PHYSBLK_EXP 0
131 #define DEF_PTYPE 0
132 #define DEF_REMOVABLE false
133 #define DEF_SCSI_LEVEL 6 /* INQUIRY, byte2 [6->SPC-4] */
134 #define DEF_SECTOR_SIZE 512
135 #define DEF_UNMAP_ALIGNMENT 0
136 #define DEF_UNMAP_GRANULARITY 1
137 #define DEF_UNMAP_MAX_BLOCKS 0xFFFFFFFF
138 #define DEF_UNMAP_MAX_DESC 256
139 #define DEF_VIRTUAL_GB 0
140 #define DEF_VPD_USE_HOSTNO 1
141 #define DEF_WRITESAME_LENGTH 0xFFFF
142 #define DEF_STRICT 0
143 #define DELAY_OVERRIDDEN -9999
144
145 /* bit mask values for scsi_debug_opts */
146 #define SCSI_DEBUG_OPT_NOISE 1
147 #define SCSI_DEBUG_OPT_MEDIUM_ERR 2
148 #define SCSI_DEBUG_OPT_TIMEOUT 4
149 #define SCSI_DEBUG_OPT_RECOVERED_ERR 8
150 #define SCSI_DEBUG_OPT_TRANSPORT_ERR 16
151 #define SCSI_DEBUG_OPT_DIF_ERR 32
152 #define SCSI_DEBUG_OPT_DIX_ERR 64
153 #define SCSI_DEBUG_OPT_MAC_TIMEOUT 128
154 #define SCSI_DEBUG_OPT_SHORT_TRANSFER 0x100
155 #define SCSI_DEBUG_OPT_Q_NOISE 0x200
156 #define SCSI_DEBUG_OPT_ALL_TSF 0x400
157 #define SCSI_DEBUG_OPT_RARE_TSF 0x800
158 #define SCSI_DEBUG_OPT_N_WCE 0x1000
159 #define SCSI_DEBUG_OPT_RESET_NOISE 0x2000
160 #define SCSI_DEBUG_OPT_NO_CDB_NOISE 0x4000
161 #define SCSI_DEBUG_OPT_ALL_NOISE (0x1 | 0x200 | 0x2000)
162 /* When "every_nth" > 0 then modulo "every_nth" commands:
163 * - a no response is simulated if SCSI_DEBUG_OPT_TIMEOUT is set
164 * - a RECOVERED_ERROR is simulated on successful read and write
165 * commands if SCSI_DEBUG_OPT_RECOVERED_ERR is set.
166 * - a TRANSPORT_ERROR is simulated on successful read and write
167 * commands if SCSI_DEBUG_OPT_TRANSPORT_ERR is set.
168 *
169 * When "every_nth" < 0 then after "- every_nth" commands:
170 * - a no response is simulated if SCSI_DEBUG_OPT_TIMEOUT is set
171 * - a RECOVERED_ERROR is simulated on successful read and write
172 * commands if SCSI_DEBUG_OPT_RECOVERED_ERR is set.
173 * - a TRANSPORT_ERROR is simulated on successful read and write
174 * commands if SCSI_DEBUG_OPT_TRANSPORT_ERR is set.
175 * This will continue until some other action occurs (e.g. the user
176 * writing a new value (other than -1 or 1) to every_nth via sysfs).
177 */
178
179 /* As indicated in SAM-5 and SPC-4 Unit Attentions (UAs)are returned in
180 * priority order. In the subset implemented here lower numbers have higher
181 * priority. The UA numbers should be a sequence starting from 0 with
182 * SDEBUG_NUM_UAS being 1 higher than the highest numbered UA. */
183 #define SDEBUG_UA_POR 0 /* Power on, reset, or bus device reset */
184 #define SDEBUG_UA_BUS_RESET 1
185 #define SDEBUG_UA_MODE_CHANGED 2
186 #define SDEBUG_UA_CAPACITY_CHANGED 3
187 #define SDEBUG_UA_LUNS_CHANGED 4
188 #define SDEBUG_UA_MICROCODE_CHANGED 5 /* simulate firmware change */
189 #define SDEBUG_UA_MICROCODE_CHANGED_WO_RESET 6
190 #define SDEBUG_NUM_UAS 7
191
192 /* for check_readiness() */
193 #define UAS_ONLY 1 /* check for UAs only */
194 #define UAS_TUR 0 /* if no UAs then check if media access possible */
195
196 /* when 1==SCSI_DEBUG_OPT_MEDIUM_ERR, a medium error is simulated at this
197 * sector on read commands: */
198 #define OPT_MEDIUM_ERR_ADDR 0x1234 /* that's sector 4660 in decimal */
199 #define OPT_MEDIUM_ERR_NUM 10 /* number of consecutive medium errs */
200
201 /* If REPORT LUNS has luns >= 256 it can choose "flat space" (value 1)
202 * or "peripheral device" addressing (value 0) */
203 #define SAM2_LUN_ADDRESS_METHOD 0
204 #define SAM2_WLUN_REPORT_LUNS 0xc101
205
206 /* SCSI_DEBUG_CANQUEUE is the maximum number of commands that can be queued
207 * (for response) at one time. Can be reduced by max_queue option. Command
208 * responses are not queued when delay=0 and ndelay=0. The per-device
209 * DEF_CMD_PER_LUN can be changed via sysfs:
210 * /sys/class/scsi_device/<h:c:t:l>/device/queue_depth but cannot exceed
211 * SCSI_DEBUG_CANQUEUE. */
212 #define SCSI_DEBUG_CANQUEUE_WORDS 9 /* a WORD is bits in a long */
213 #define SCSI_DEBUG_CANQUEUE (SCSI_DEBUG_CANQUEUE_WORDS * BITS_PER_LONG)
214 #define DEF_CMD_PER_LUN 255
215
216 #if DEF_CMD_PER_LUN > SCSI_DEBUG_CANQUEUE
217 #warning "Expect DEF_CMD_PER_LUN <= SCSI_DEBUG_CANQUEUE"
218 #endif
219
220 /* SCSI opcodes (first byte of cdb) mapped onto these indexes */
221 enum sdeb_opcode_index {
222 SDEB_I_INVALID_OPCODE = 0,
223 SDEB_I_INQUIRY = 1,
224 SDEB_I_REPORT_LUNS = 2,
225 SDEB_I_REQUEST_SENSE = 3,
226 SDEB_I_TEST_UNIT_READY = 4,
227 SDEB_I_MODE_SENSE = 5, /* 6, 10 */
228 SDEB_I_MODE_SELECT = 6, /* 6, 10 */
229 SDEB_I_LOG_SENSE = 7,
230 SDEB_I_READ_CAPACITY = 8, /* 10; 16 is in SA_IN(16) */
231 SDEB_I_READ = 9, /* 6, 10, 12, 16 */
232 SDEB_I_WRITE = 10, /* 6, 10, 12, 16 */
233 SDEB_I_START_STOP = 11,
234 SDEB_I_SERV_ACT_IN = 12, /* 12, 16 */
235 SDEB_I_SERV_ACT_OUT = 13, /* 12, 16 */
236 SDEB_I_MAINT_IN = 14,
237 SDEB_I_MAINT_OUT = 15,
238 SDEB_I_VERIFY = 16, /* 10 only */
239 SDEB_I_VARIABLE_LEN = 17,
240 SDEB_I_RESERVE = 18, /* 6, 10 */
241 SDEB_I_RELEASE = 19, /* 6, 10 */
242 SDEB_I_ALLOW_REMOVAL = 20, /* PREVENT ALLOW MEDIUM REMOVAL */
243 SDEB_I_REZERO_UNIT = 21, /* REWIND in SSC */
244 SDEB_I_ATA_PT = 22, /* 12, 16 */
245 SDEB_I_SEND_DIAG = 23,
246 SDEB_I_UNMAP = 24,
247 SDEB_I_XDWRITEREAD = 25, /* 10 only */
248 SDEB_I_WRITE_BUFFER = 26,
249 SDEB_I_WRITE_SAME = 27, /* 10, 16 */
250 SDEB_I_SYNC_CACHE = 28, /* 10 only */
251 SDEB_I_COMP_WRITE = 29,
252 SDEB_I_LAST_ELEMENT = 30, /* keep this last */
253 };
254
255 static const unsigned char opcode_ind_arr[256] = {
256 /* 0x0; 0x0->0x1f: 6 byte cdbs */
257 SDEB_I_TEST_UNIT_READY, SDEB_I_REZERO_UNIT, 0, SDEB_I_REQUEST_SENSE,
258 0, 0, 0, 0,
259 SDEB_I_READ, 0, SDEB_I_WRITE, 0, 0, 0, 0, 0,
260 0, 0, SDEB_I_INQUIRY, 0, 0, SDEB_I_MODE_SELECT, SDEB_I_RESERVE,
261 SDEB_I_RELEASE,
262 0, 0, SDEB_I_MODE_SENSE, SDEB_I_START_STOP, 0, SDEB_I_SEND_DIAG,
263 SDEB_I_ALLOW_REMOVAL, 0,
264 /* 0x20; 0x20->0x3f: 10 byte cdbs */
265 0, 0, 0, 0, 0, SDEB_I_READ_CAPACITY, 0, 0,
266 SDEB_I_READ, 0, SDEB_I_WRITE, 0, 0, 0, 0, SDEB_I_VERIFY,
267 0, 0, 0, 0, 0, SDEB_I_SYNC_CACHE, 0, 0,
268 0, 0, 0, SDEB_I_WRITE_BUFFER, 0, 0, 0, 0,
269 /* 0x40; 0x40->0x5f: 10 byte cdbs */
270 0, SDEB_I_WRITE_SAME, SDEB_I_UNMAP, 0, 0, 0, 0, 0,
271 0, 0, 0, 0, 0, SDEB_I_LOG_SENSE, 0, 0,
272 0, 0, 0, SDEB_I_XDWRITEREAD, 0, SDEB_I_MODE_SELECT, SDEB_I_RESERVE,
273 SDEB_I_RELEASE,
274 0, 0, SDEB_I_MODE_SENSE, 0, 0, 0, 0, 0,
275 /* 0x60; 0x60->0x7d are reserved */
276 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
277 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
278 0, SDEB_I_VARIABLE_LEN,
279 /* 0x80; 0x80->0x9f: 16 byte cdbs */
280 0, 0, 0, 0, 0, SDEB_I_ATA_PT, 0, 0,
281 SDEB_I_READ, SDEB_I_COMP_WRITE, SDEB_I_WRITE, 0, 0, 0, 0, 0,
282 0, 0, 0, SDEB_I_WRITE_SAME, 0, 0, 0, 0,
283 0, 0, 0, 0, 0, 0, SDEB_I_SERV_ACT_IN, SDEB_I_SERV_ACT_OUT,
284 /* 0xa0; 0xa0->0xbf: 12 byte cdbs */
285 SDEB_I_REPORT_LUNS, SDEB_I_ATA_PT, 0, SDEB_I_MAINT_IN,
286 SDEB_I_MAINT_OUT, 0, 0, 0,
287 SDEB_I_READ, SDEB_I_SERV_ACT_OUT, SDEB_I_WRITE, SDEB_I_SERV_ACT_IN,
288 0, 0, 0, 0,
289 0, 0, 0, 0, 0, 0, 0, 0,
290 0, 0, 0, 0, 0, 0, 0, 0,
291 /* 0xc0; 0xc0->0xff: vendor specific */
292 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
293 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
294 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
295 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
296 };
297
298 #define F_D_IN 1
299 #define F_D_OUT 2
300 #define F_D_OUT_MAYBE 4 /* WRITE SAME, NDOB bit */
301 #define F_D_UNKN 8
302 #define F_RL_WLUN_OK 0x10
303 #define F_SKIP_UA 0x20
304 #define F_DELAY_OVERR 0x40
305 #define F_SA_LOW 0x80 /* cdb byte 1, bits 4 to 0 */
306 #define F_SA_HIGH 0x100 /* as used by variable length cdbs */
307 #define F_INV_OP 0x200
308 #define F_FAKE_RW 0x400
309 #define F_M_ACCESS 0x800 /* media access */
310
311 #define FF_RESPOND (F_RL_WLUN_OK | F_SKIP_UA | F_DELAY_OVERR)
312 #define FF_DIRECT_IO (F_M_ACCESS | F_FAKE_RW)
313 #define FF_SA (F_SA_HIGH | F_SA_LOW)
314
315 struct sdebug_dev_info;
316 static int resp_inquiry(struct scsi_cmnd *, struct sdebug_dev_info *);
317 static int resp_report_luns(struct scsi_cmnd *, struct sdebug_dev_info *);
318 static int resp_requests(struct scsi_cmnd *, struct sdebug_dev_info *);
319 static int resp_mode_sense(struct scsi_cmnd *, struct sdebug_dev_info *);
320 static int resp_mode_select(struct scsi_cmnd *, struct sdebug_dev_info *);
321 static int resp_log_sense(struct scsi_cmnd *, struct sdebug_dev_info *);
322 static int resp_readcap(struct scsi_cmnd *, struct sdebug_dev_info *);
323 static int resp_read_dt0(struct scsi_cmnd *, struct sdebug_dev_info *);
324 static int resp_write_dt0(struct scsi_cmnd *, struct sdebug_dev_info *);
325 static int resp_start_stop(struct scsi_cmnd *, struct sdebug_dev_info *);
326 static int resp_readcap16(struct scsi_cmnd *, struct sdebug_dev_info *);
327 static int resp_get_lba_status(struct scsi_cmnd *, struct sdebug_dev_info *);
328 static int resp_report_tgtpgs(struct scsi_cmnd *, struct sdebug_dev_info *);
329 static int resp_unmap(struct scsi_cmnd *, struct sdebug_dev_info *);
330 static int resp_rsup_opcodes(struct scsi_cmnd *, struct sdebug_dev_info *);
331 static int resp_rsup_tmfs(struct scsi_cmnd *, struct sdebug_dev_info *);
332 static int resp_write_same_10(struct scsi_cmnd *, struct sdebug_dev_info *);
333 static int resp_write_same_16(struct scsi_cmnd *, struct sdebug_dev_info *);
334 static int resp_xdwriteread_10(struct scsi_cmnd *, struct sdebug_dev_info *);
335 static int resp_comp_write(struct scsi_cmnd *, struct sdebug_dev_info *);
336 static int resp_write_buffer(struct scsi_cmnd *, struct sdebug_dev_info *);
337
338 struct opcode_info_t {
339 u8 num_attached; /* 0 if this is it (i.e. a leaf); use 0xff
340 * for terminating element */
341 u8 opcode; /* if num_attached > 0, preferred */
342 u16 sa; /* service action */
343 u32 flags; /* OR-ed set of SDEB_F_* */
344 int (*pfp)(struct scsi_cmnd *, struct sdebug_dev_info *);
345 const struct opcode_info_t *arrp; /* num_attached elements or NULL */
346 u8 len_mask[16]; /* len=len_mask[0], then mask for cdb[1]... */
347 /* ignore cdb bytes after position 15 */
348 };
349
350 static const struct opcode_info_t msense_iarr[1] = {
351 {0, 0x1a, 0, F_D_IN, NULL, NULL,
352 {6, 0xe8, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
353 };
354
355 static const struct opcode_info_t mselect_iarr[1] = {
356 {0, 0x15, 0, F_D_OUT, NULL, NULL,
357 {6, 0xf1, 0, 0, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
358 };
359
360 static const struct opcode_info_t read_iarr[3] = {
361 {0, 0x28, 0, F_D_IN | FF_DIRECT_IO, resp_read_dt0, NULL,/* READ(10) */
362 {10, 0xff, 0xff, 0xff, 0xff, 0xff, 0x1f, 0xff, 0xff, 0xc7, 0, 0,
363 0, 0, 0, 0} },
364 {0, 0x8, 0, F_D_IN | FF_DIRECT_IO, resp_read_dt0, NULL, /* READ(6) */
365 {6, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
366 {0, 0xa8, 0, F_D_IN | FF_DIRECT_IO, resp_read_dt0, NULL,/* READ(12) */
367 {12, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x9f,
368 0xc7, 0, 0, 0, 0} },
369 };
370
371 static const struct opcode_info_t write_iarr[3] = {
372 {0, 0x2a, 0, F_D_OUT | FF_DIRECT_IO, resp_write_dt0, NULL, /* 10 */
373 {10, 0xfb, 0xff, 0xff, 0xff, 0xff, 0x1f, 0xff, 0xff, 0xc7, 0, 0,
374 0, 0, 0, 0} },
375 {0, 0xa, 0, F_D_OUT | FF_DIRECT_IO, resp_write_dt0, NULL, /* 6 */
376 {6, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
377 {0, 0xaa, 0, F_D_OUT | FF_DIRECT_IO, resp_write_dt0, NULL, /* 12 */
378 {12, 0xfb, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x9f,
379 0xc7, 0, 0, 0, 0} },
380 };
381
382 static const struct opcode_info_t sa_in_iarr[1] = {
383 {0, 0x9e, 0x12, F_SA_LOW | F_D_IN, resp_get_lba_status, NULL,
384 {16, 0x12, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
385 0xff, 0xff, 0xff, 0, 0xc7} },
386 };
387
388 static const struct opcode_info_t vl_iarr[1] = { /* VARIABLE LENGTH */
389 {0, 0x7f, 0xb, F_SA_HIGH | F_D_OUT | FF_DIRECT_IO, resp_write_dt0,
390 NULL, {32, 0xc7, 0, 0, 0, 0, 0x1f, 0x18, 0x0, 0xb, 0xfa,
391 0, 0xff, 0xff, 0xff, 0xff} }, /* WRITE(32) */
392 };
393
394 static const struct opcode_info_t maint_in_iarr[2] = {
395 {0, 0xa3, 0xc, F_SA_LOW | F_D_IN, resp_rsup_opcodes, NULL,
396 {12, 0xc, 0x87, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0,
397 0xc7, 0, 0, 0, 0} },
398 {0, 0xa3, 0xd, F_SA_LOW | F_D_IN, resp_rsup_tmfs, NULL,
399 {12, 0xd, 0x80, 0, 0, 0, 0xff, 0xff, 0xff, 0xff, 0, 0xc7, 0, 0,
400 0, 0} },
401 };
402
403 static const struct opcode_info_t write_same_iarr[1] = {
404 {0, 0x93, 0, F_D_OUT_MAYBE | FF_DIRECT_IO, resp_write_same_16, NULL,
405 {16, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
406 0xff, 0xff, 0xff, 0x1f, 0xc7} },
407 };
408
409 static const struct opcode_info_t reserve_iarr[1] = {
410 {0, 0x16, 0, F_D_OUT, NULL, NULL, /* RESERVE(6) */
411 {6, 0x1f, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
412 };
413
414 static const struct opcode_info_t release_iarr[1] = {
415 {0, 0x17, 0, F_D_OUT, NULL, NULL, /* RELEASE(6) */
416 {6, 0x1f, 0xff, 0, 0, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
417 };
418
419
420 /* This array is accessed via SDEB_I_* values. Make sure all are mapped,
421 * plus the terminating elements for logic that scans this table such as
422 * REPORT SUPPORTED OPERATION CODES. */
423 static const struct opcode_info_t opcode_info_arr[SDEB_I_LAST_ELEMENT + 1] = {
424 /* 0 */
425 {0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL,
426 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
427 {0, 0x12, 0, FF_RESPOND | F_D_IN, resp_inquiry, NULL,
428 {6, 0xe3, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
429 {0, 0xa0, 0, FF_RESPOND | F_D_IN, resp_report_luns, NULL,
430 {12, 0xe3, 0xff, 0, 0, 0, 0xff, 0xff, 0xff, 0xff, 0, 0xc7, 0, 0,
431 0, 0} },
432 {0, 0x3, 0, FF_RESPOND | F_D_IN, resp_requests, NULL,
433 {6, 0xe1, 0, 0, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
434 {0, 0x0, 0, F_M_ACCESS | F_RL_WLUN_OK, NULL, NULL,/* TEST UNIT READY */
435 {6, 0, 0, 0, 0, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
436 {1, 0x5a, 0, F_D_IN, resp_mode_sense, msense_iarr,
437 {10, 0xf8, 0xff, 0xff, 0, 0, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0,
438 0} },
439 {1, 0x55, 0, F_D_OUT, resp_mode_select, mselect_iarr,
440 {10, 0xf1, 0, 0, 0, 0, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0} },
441 {0, 0x4d, 0, F_D_IN, resp_log_sense, NULL,
442 {10, 0xe3, 0xff, 0xff, 0, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0,
443 0, 0, 0} },
444 {0, 0x25, 0, F_D_IN, resp_readcap, NULL,
445 {10, 0xe1, 0xff, 0xff, 0xff, 0xff, 0, 0, 0x1, 0xc7, 0, 0, 0, 0,
446 0, 0} },
447 {3, 0x88, 0, F_D_IN | FF_DIRECT_IO, resp_read_dt0, read_iarr,
448 {16, 0xfe, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
449 0xff, 0xff, 0xff, 0x9f, 0xc7} }, /* READ(16) */
450 /* 10 */
451 {3, 0x8a, 0, F_D_OUT | FF_DIRECT_IO, resp_write_dt0, write_iarr,
452 {16, 0xfa, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
453 0xff, 0xff, 0xff, 0x9f, 0xc7} }, /* WRITE(16) */
454 {0, 0x1b, 0, 0, resp_start_stop, NULL, /* START STOP UNIT */
455 {6, 0x1, 0, 0xf, 0xf7, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
456 {1, 0x9e, 0x10, F_SA_LOW | F_D_IN, resp_readcap16, sa_in_iarr,
457 {16, 0x10, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
458 0xff, 0xff, 0xff, 0x1, 0xc7} }, /* READ CAPACITY(16) */
459 {0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL, /* SA OUT */
460 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
461 {2, 0xa3, 0xa, F_SA_LOW | F_D_IN, resp_report_tgtpgs, maint_in_iarr,
462 {12, 0xea, 0, 0, 0, 0, 0xff, 0xff, 0xff, 0xff, 0, 0xc7, 0, 0, 0,
463 0} },
464 {0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL, /* MAINT OUT */
465 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
466 {0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL, /* VERIFY */
467 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
468 {1, 0x7f, 0x9, F_SA_HIGH | F_D_IN | FF_DIRECT_IO, resp_read_dt0,
469 vl_iarr, {32, 0xc7, 0, 0, 0, 0, 0x1f, 0x18, 0x0, 0x9, 0xfe, 0,
470 0xff, 0xff, 0xff, 0xff} },/* VARIABLE LENGTH, READ(32) */
471 {1, 0x56, 0, F_D_OUT, NULL, reserve_iarr, /* RESERVE(10) */
472 {10, 0xff, 0xff, 0xff, 0, 0, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0,
473 0} },
474 {1, 0x57, 0, F_D_OUT, NULL, release_iarr, /* RELEASE(10) */
475 {10, 0x13, 0xff, 0xff, 0, 0, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0,
476 0} },
477 /* 20 */
478 {0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL, /* ALLOW REMOVAL */
479 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
480 {0, 0x1, 0, 0, resp_start_stop, NULL, /* REWIND ?? */
481 {6, 0x1, 0, 0, 0, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
482 {0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL, /* ATA_PT */
483 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
484 {0, 0x1d, F_D_OUT, 0, NULL, NULL, /* SEND DIAGNOSTIC */
485 {6, 0xf7, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
486 {0, 0x42, 0, F_D_OUT | FF_DIRECT_IO, resp_unmap, NULL, /* UNMAP */
487 {10, 0x1, 0, 0, 0, 0, 0x1f, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0} },
488 {0, 0x53, 0, F_D_IN | F_D_OUT | FF_DIRECT_IO, resp_xdwriteread_10,
489 NULL, {10, 0xff, 0xff, 0xff, 0xff, 0xff, 0x1f, 0xff, 0xff, 0xc7,
490 0, 0, 0, 0, 0, 0} },
491 {0, 0x3b, 0, F_D_OUT_MAYBE, resp_write_buffer, NULL,
492 {10, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0,
493 0, 0, 0, 0} }, /* WRITE_BUFFER */
494 {1, 0x41, 0, F_D_OUT_MAYBE | FF_DIRECT_IO, resp_write_same_10,
495 write_same_iarr, {10, 0xff, 0xff, 0xff, 0xff, 0xff, 0x1f, 0xff,
496 0xff, 0xc7, 0, 0, 0, 0, 0, 0} },
497 {0, 0x35, 0, F_DELAY_OVERR | FF_DIRECT_IO, NULL, NULL, /* SYNC_CACHE */
498 {10, 0x7, 0xff, 0xff, 0xff, 0xff, 0x1f, 0xff, 0xff, 0xc7, 0, 0,
499 0, 0, 0, 0} },
500 {0, 0x89, 0, F_D_OUT | FF_DIRECT_IO, resp_comp_write, NULL,
501 {16, 0xf8, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0, 0,
502 0, 0xff, 0x1f, 0xc7} }, /* COMPARE AND WRITE */
503
504 /* 30 */
505 {0xff, 0, 0, 0, NULL, NULL, /* terminating element */
506 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
507 };
508
509 struct sdebug_scmd_extra_t {
510 bool inj_recovered;
511 bool inj_transport;
512 bool inj_dif;
513 bool inj_dix;
514 bool inj_short;
515 };
516
517 static int scsi_debug_add_host = DEF_NUM_HOST;
518 static int scsi_debug_ato = DEF_ATO;
519 static int scsi_debug_delay = DEF_DELAY;
520 static int scsi_debug_dev_size_mb = DEF_DEV_SIZE_MB;
521 static int scsi_debug_dif = DEF_DIF;
522 static int scsi_debug_dix = DEF_DIX;
523 static int scsi_debug_dsense = DEF_D_SENSE;
524 static int scsi_debug_every_nth = DEF_EVERY_NTH;
525 static int scsi_debug_fake_rw = DEF_FAKE_RW;
526 static unsigned int scsi_debug_guard = DEF_GUARD;
527 static int scsi_debug_lowest_aligned = DEF_LOWEST_ALIGNED;
528 static int scsi_debug_max_luns = DEF_MAX_LUNS;
529 static int scsi_debug_max_queue = SCSI_DEBUG_CANQUEUE;
530 static atomic_t retired_max_queue; /* if > 0 then was prior max_queue */
531 static int scsi_debug_ndelay = DEF_NDELAY;
532 static int scsi_debug_no_lun_0 = DEF_NO_LUN_0;
533 static int scsi_debug_no_uld = 0;
534 static int scsi_debug_num_parts = DEF_NUM_PARTS;
535 static int scsi_debug_num_tgts = DEF_NUM_TGTS; /* targets per host */
536 static int scsi_debug_opt_blks = DEF_OPT_BLKS;
537 static int scsi_debug_opts = DEF_OPTS;
538 static int scsi_debug_physblk_exp = DEF_PHYSBLK_EXP;
539 static int scsi_debug_ptype = DEF_PTYPE; /* SCSI peripheral type (0==disk) */
540 static int scsi_debug_scsi_level = DEF_SCSI_LEVEL;
541 static int scsi_debug_sector_size = DEF_SECTOR_SIZE;
542 static int scsi_debug_virtual_gb = DEF_VIRTUAL_GB;
543 static int scsi_debug_vpd_use_hostno = DEF_VPD_USE_HOSTNO;
544 static unsigned int scsi_debug_lbpu = DEF_LBPU;
545 static unsigned int scsi_debug_lbpws = DEF_LBPWS;
546 static unsigned int scsi_debug_lbpws10 = DEF_LBPWS10;
547 static unsigned int scsi_debug_lbprz = DEF_LBPRZ;
548 static unsigned int scsi_debug_unmap_alignment = DEF_UNMAP_ALIGNMENT;
549 static unsigned int scsi_debug_unmap_granularity = DEF_UNMAP_GRANULARITY;
550 static unsigned int scsi_debug_unmap_max_blocks = DEF_UNMAP_MAX_BLOCKS;
551 static unsigned int scsi_debug_unmap_max_desc = DEF_UNMAP_MAX_DESC;
552 static unsigned int scsi_debug_write_same_length = DEF_WRITESAME_LENGTH;
553 static bool scsi_debug_removable = DEF_REMOVABLE;
554 static bool scsi_debug_clustering;
555 static bool scsi_debug_host_lock = DEF_HOST_LOCK;
556 static bool scsi_debug_strict = DEF_STRICT;
557 static bool sdebug_any_injecting_opt;
558
559 static atomic_t sdebug_cmnd_count;
560 static atomic_t sdebug_completions;
561 static atomic_t sdebug_a_tsf; /* counter of 'almost' TSFs */
562
563 #define DEV_READONLY(TGT) (0)
564
565 static unsigned int sdebug_store_sectors;
566 static sector_t sdebug_capacity; /* in sectors */
567
568 /* old BIOS stuff, kernel may get rid of them but some mode sense pages
569 may still need them */
570 static int sdebug_heads; /* heads per disk */
571 static int sdebug_cylinders_per; /* cylinders per surface */
572 static int sdebug_sectors_per; /* sectors per cylinder */
573
574 #define SDEBUG_MAX_PARTS 4
575
576 #define SCSI_DEBUG_MAX_CMD_LEN 32
577
578 static unsigned int scsi_debug_lbp(void)
579 {
580 return ((0 == scsi_debug_fake_rw) &&
581 (scsi_debug_lbpu | scsi_debug_lbpws | scsi_debug_lbpws10));
582 }
583
584 struct sdebug_dev_info {
585 struct list_head dev_list;
586 unsigned int channel;
587 unsigned int target;
588 u64 lun;
589 struct sdebug_host_info *sdbg_host;
590 unsigned long uas_bm[1];
591 atomic_t num_in_q;
592 char stopped; /* TODO: should be atomic */
593 bool used;
594 };
595
596 struct sdebug_host_info {
597 struct list_head host_list;
598 struct Scsi_Host *shost;
599 struct device dev;
600 struct list_head dev_info_list;
601 };
602
603 #define to_sdebug_host(d) \
604 container_of(d, struct sdebug_host_info, dev)
605
606 static LIST_HEAD(sdebug_host_list);
607 static DEFINE_SPINLOCK(sdebug_host_list_lock);
608
609
610 struct sdebug_hrtimer { /* ... is derived from hrtimer */
611 struct hrtimer hrt; /* must be first element */
612 int qa_indx;
613 };
614
615 struct sdebug_queued_cmd {
616 /* in_use flagged by a bit in queued_in_use_bm[] */
617 struct timer_list *cmnd_timerp;
618 struct tasklet_struct *tletp;
619 struct sdebug_hrtimer *sd_hrtp;
620 struct scsi_cmnd * a_cmnd;
621 };
622 static struct sdebug_queued_cmd queued_arr[SCSI_DEBUG_CANQUEUE];
623 static unsigned long queued_in_use_bm[SCSI_DEBUG_CANQUEUE_WORDS];
624
625
626 static unsigned char * fake_storep; /* ramdisk storage */
627 static struct sd_dif_tuple *dif_storep; /* protection info */
628 static void *map_storep; /* provisioning map */
629
630 static unsigned long map_size;
631 static int num_aborts;
632 static int num_dev_resets;
633 static int num_target_resets;
634 static int num_bus_resets;
635 static int num_host_resets;
636 static int dix_writes;
637 static int dix_reads;
638 static int dif_errors;
639
640 static DEFINE_SPINLOCK(queued_arr_lock);
641 static DEFINE_RWLOCK(atomic_rw);
642
643 static char sdebug_proc_name[] = MY_NAME;
644 static const char *my_name = MY_NAME;
645
646 static struct bus_type pseudo_lld_bus;
647
648 static struct device_driver sdebug_driverfs_driver = {
649 .name = sdebug_proc_name,
650 .bus = &pseudo_lld_bus,
651 };
652
653 static const int check_condition_result =
654 (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
655
656 static const int illegal_condition_result =
657 (DRIVER_SENSE << 24) | (DID_ABORT << 16) | SAM_STAT_CHECK_CONDITION;
658
659 static const int device_qfull_result =
660 (DID_OK << 16) | (COMMAND_COMPLETE << 8) | SAM_STAT_TASK_SET_FULL;
661
662 static unsigned char caching_pg[] = {0x8, 18, 0x14, 0, 0xff, 0xff, 0, 0,
663 0xff, 0xff, 0xff, 0xff, 0x80, 0x14, 0, 0,
664 0, 0, 0, 0};
665 static unsigned char ctrl_m_pg[] = {0xa, 10, 2, 0, 0, 0, 0, 0,
666 0, 0, 0x2, 0x4b};
667 static unsigned char iec_m_pg[] = {0x1c, 0xa, 0x08, 0, 0, 0, 0, 0,
668 0, 0, 0x0, 0x0};
669
670 static void *fake_store(unsigned long long lba)
671 {
672 lba = do_div(lba, sdebug_store_sectors);
673
674 return fake_storep + lba * scsi_debug_sector_size;
675 }
676
677 static struct sd_dif_tuple *dif_store(sector_t sector)
678 {
679 sector = do_div(sector, sdebug_store_sectors);
680
681 return dif_storep + sector;
682 }
683
684 static int sdebug_add_adapter(void);
685 static void sdebug_remove_adapter(void);
686
687 static void sdebug_max_tgts_luns(void)
688 {
689 struct sdebug_host_info *sdbg_host;
690 struct Scsi_Host *hpnt;
691
692 spin_lock(&sdebug_host_list_lock);
693 list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) {
694 hpnt = sdbg_host->shost;
695 if ((hpnt->this_id >= 0) &&
696 (scsi_debug_num_tgts > hpnt->this_id))
697 hpnt->max_id = scsi_debug_num_tgts + 1;
698 else
699 hpnt->max_id = scsi_debug_num_tgts;
700 /* scsi_debug_max_luns; */
701 hpnt->max_lun = SAM2_WLUN_REPORT_LUNS;
702 }
703 spin_unlock(&sdebug_host_list_lock);
704 }
705
706 enum sdeb_cmd_data {SDEB_IN_DATA = 0, SDEB_IN_CDB = 1};
707
708 /* Set in_bit to -1 to indicate no bit position of invalid field */
709 static void
710 mk_sense_invalid_fld(struct scsi_cmnd *scp, enum sdeb_cmd_data c_d,
711 int in_byte, int in_bit)
712 {
713 unsigned char *sbuff;
714 u8 sks[4];
715 int sl, asc;
716
717 sbuff = scp->sense_buffer;
718 if (!sbuff) {
719 sdev_printk(KERN_ERR, scp->device,
720 "%s: sense_buffer is NULL\n", __func__);
721 return;
722 }
723 asc = c_d ? INVALID_FIELD_IN_CDB : INVALID_FIELD_IN_PARAM_LIST;
724 memset(sbuff, 0, SCSI_SENSE_BUFFERSIZE);
725 scsi_build_sense_buffer(scsi_debug_dsense, sbuff, ILLEGAL_REQUEST,
726 asc, 0);
727 memset(sks, 0, sizeof(sks));
728 sks[0] = 0x80;
729 if (c_d)
730 sks[0] |= 0x40;
731 if (in_bit >= 0) {
732 sks[0] |= 0x8;
733 sks[0] |= 0x7 & in_bit;
734 }
735 put_unaligned_be16(in_byte, sks + 1);
736 if (scsi_debug_dsense) {
737 sl = sbuff[7] + 8;
738 sbuff[7] = sl;
739 sbuff[sl] = 0x2;
740 sbuff[sl + 1] = 0x6;
741 memcpy(sbuff + sl + 4, sks, 3);
742 } else
743 memcpy(sbuff + 15, sks, 3);
744 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
745 sdev_printk(KERN_INFO, scp->device, "%s: [sense_key,asc,ascq"
746 "]: [0x5,0x%x,0x0] %c byte=%d, bit=%d\n",
747 my_name, asc, c_d ? 'C' : 'D', in_byte, in_bit);
748 }
749
750 static void mk_sense_buffer(struct scsi_cmnd *scp, int key, int asc, int asq)
751 {
752 unsigned char *sbuff;
753
754 sbuff = scp->sense_buffer;
755 if (!sbuff) {
756 sdev_printk(KERN_ERR, scp->device,
757 "%s: sense_buffer is NULL\n", __func__);
758 return;
759 }
760 memset(sbuff, 0, SCSI_SENSE_BUFFERSIZE);
761
762 scsi_build_sense_buffer(scsi_debug_dsense, sbuff, key, asc, asq);
763
764 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
765 sdev_printk(KERN_INFO, scp->device,
766 "%s: [sense_key,asc,ascq]: [0x%x,0x%x,0x%x]\n",
767 my_name, key, asc, asq);
768 }
769
770 static void
771 mk_sense_invalid_opcode(struct scsi_cmnd *scp)
772 {
773 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_OPCODE, 0);
774 }
775
776 static int scsi_debug_ioctl(struct scsi_device *dev, int cmd, void __user *arg)
777 {
778 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) {
779 if (0x1261 == cmd)
780 sdev_printk(KERN_INFO, dev,
781 "%s: BLKFLSBUF [0x1261]\n", __func__);
782 else if (0x5331 == cmd)
783 sdev_printk(KERN_INFO, dev,
784 "%s: CDROM_GET_CAPABILITY [0x5331]\n",
785 __func__);
786 else
787 sdev_printk(KERN_INFO, dev, "%s: cmd=0x%x\n",
788 __func__, cmd);
789 }
790 return -EINVAL;
791 /* return -ENOTTY; // correct return but upsets fdisk */
792 }
793
794 static void clear_luns_changed_on_target(struct sdebug_dev_info *devip)
795 {
796 struct sdebug_host_info *sdhp;
797 struct sdebug_dev_info *dp;
798
799 spin_lock(&sdebug_host_list_lock);
800 list_for_each_entry(sdhp, &sdebug_host_list, host_list) {
801 list_for_each_entry(dp, &sdhp->dev_info_list, dev_list) {
802 if ((devip->sdbg_host == dp->sdbg_host) &&
803 (devip->target == dp->target))
804 clear_bit(SDEBUG_UA_LUNS_CHANGED, dp->uas_bm);
805 }
806 }
807 spin_unlock(&sdebug_host_list_lock);
808 }
809
810 static int check_readiness(struct scsi_cmnd *SCpnt, int uas_only,
811 struct sdebug_dev_info * devip)
812 {
813 int k;
814 bool debug = !!(SCSI_DEBUG_OPT_NOISE & scsi_debug_opts);
815
816 k = find_first_bit(devip->uas_bm, SDEBUG_NUM_UAS);
817 if (k != SDEBUG_NUM_UAS) {
818 const char *cp = NULL;
819
820 switch (k) {
821 case SDEBUG_UA_POR:
822 mk_sense_buffer(SCpnt, UNIT_ATTENTION,
823 UA_RESET_ASC, POWER_ON_RESET_ASCQ);
824 if (debug)
825 cp = "power on reset";
826 break;
827 case SDEBUG_UA_BUS_RESET:
828 mk_sense_buffer(SCpnt, UNIT_ATTENTION,
829 UA_RESET_ASC, BUS_RESET_ASCQ);
830 if (debug)
831 cp = "bus reset";
832 break;
833 case SDEBUG_UA_MODE_CHANGED:
834 mk_sense_buffer(SCpnt, UNIT_ATTENTION,
835 UA_CHANGED_ASC, MODE_CHANGED_ASCQ);
836 if (debug)
837 cp = "mode parameters changed";
838 break;
839 case SDEBUG_UA_CAPACITY_CHANGED:
840 mk_sense_buffer(SCpnt, UNIT_ATTENTION,
841 UA_CHANGED_ASC, CAPACITY_CHANGED_ASCQ);
842 if (debug)
843 cp = "capacity data changed";
844 break;
845 case SDEBUG_UA_MICROCODE_CHANGED:
846 mk_sense_buffer(SCpnt, UNIT_ATTENTION,
847 TARGET_CHANGED_ASC, MICROCODE_CHANGED_ASCQ);
848 if (debug)
849 cp = "microcode has been changed";
850 break;
851 case SDEBUG_UA_MICROCODE_CHANGED_WO_RESET:
852 mk_sense_buffer(SCpnt, UNIT_ATTENTION,
853 TARGET_CHANGED_ASC,
854 MICROCODE_CHANGED_WO_RESET_ASCQ);
855 if (debug)
856 cp = "microcode has been changed without reset";
857 break;
858 case SDEBUG_UA_LUNS_CHANGED:
859 /*
860 * SPC-3 behavior is to report a UNIT ATTENTION with
861 * ASC/ASCQ REPORTED LUNS DATA HAS CHANGED on every LUN
862 * on the target, until a REPORT LUNS command is
863 * received. SPC-4 behavior is to report it only once.
864 * NOTE: scsi_debug_scsi_level does not use the same
865 * values as struct scsi_device->scsi_level.
866 */
867 if (scsi_debug_scsi_level >= 6) /* SPC-4 and above */
868 clear_luns_changed_on_target(devip);
869 mk_sense_buffer(SCpnt, UNIT_ATTENTION,
870 TARGET_CHANGED_ASC,
871 LUNS_CHANGED_ASCQ);
872 if (debug)
873 cp = "reported luns data has changed";
874 break;
875 default:
876 pr_warn("%s: unexpected unit attention code=%d\n",
877 __func__, k);
878 if (debug)
879 cp = "unknown";
880 break;
881 }
882 clear_bit(k, devip->uas_bm);
883 if (debug)
884 sdev_printk(KERN_INFO, SCpnt->device,
885 "%s reports: Unit attention: %s\n",
886 my_name, cp);
887 return check_condition_result;
888 }
889 if ((UAS_TUR == uas_only) && devip->stopped) {
890 mk_sense_buffer(SCpnt, NOT_READY, LOGICAL_UNIT_NOT_READY,
891 0x2);
892 if (debug)
893 sdev_printk(KERN_INFO, SCpnt->device,
894 "%s reports: Not ready: %s\n", my_name,
895 "initializing command required");
896 return check_condition_result;
897 }
898 return 0;
899 }
900
901 /* Returns 0 if ok else (DID_ERROR << 16). Sets scp->resid . */
902 static int fill_from_dev_buffer(struct scsi_cmnd *scp, unsigned char *arr,
903 int arr_len)
904 {
905 int act_len;
906 struct scsi_data_buffer *sdb = scsi_in(scp);
907
908 if (!sdb->length)
909 return 0;
910 if (!(scsi_bidi_cmnd(scp) || scp->sc_data_direction == DMA_FROM_DEVICE))
911 return (DID_ERROR << 16);
912
913 act_len = sg_copy_from_buffer(sdb->table.sgl, sdb->table.nents,
914 arr, arr_len);
915 sdb->resid = scsi_bufflen(scp) - act_len;
916
917 return 0;
918 }
919
920 /* Returns number of bytes fetched into 'arr' or -1 if error. */
921 static int fetch_to_dev_buffer(struct scsi_cmnd *scp, unsigned char *arr,
922 int arr_len)
923 {
924 if (!scsi_bufflen(scp))
925 return 0;
926 if (!(scsi_bidi_cmnd(scp) || scp->sc_data_direction == DMA_TO_DEVICE))
927 return -1;
928
929 return scsi_sg_copy_to_buffer(scp, arr, arr_len);
930 }
931
932
933 static const char * inq_vendor_id = "Linux ";
934 static const char * inq_product_id = "scsi_debug ";
935 static const char *inq_product_rev = "0184"; /* version less '.' */
936
937 /* Device identification VPD page. Returns number of bytes placed in arr */
938 static int inquiry_evpd_83(unsigned char * arr, int port_group_id,
939 int target_dev_id, int dev_id_num,
940 const char * dev_id_str,
941 int dev_id_str_len)
942 {
943 int num, port_a;
944 char b[32];
945
946 port_a = target_dev_id + 1;
947 /* T10 vendor identifier field format (faked) */
948 arr[0] = 0x2; /* ASCII */
949 arr[1] = 0x1;
950 arr[2] = 0x0;
951 memcpy(&arr[4], inq_vendor_id, 8);
952 memcpy(&arr[12], inq_product_id, 16);
953 memcpy(&arr[28], dev_id_str, dev_id_str_len);
954 num = 8 + 16 + dev_id_str_len;
955 arr[3] = num;
956 num += 4;
957 if (dev_id_num >= 0) {
958 /* NAA-5, Logical unit identifier (binary) */
959 arr[num++] = 0x1; /* binary (not necessarily sas) */
960 arr[num++] = 0x3; /* PIV=0, lu, naa */
961 arr[num++] = 0x0;
962 arr[num++] = 0x8;
963 arr[num++] = 0x53; /* naa-5 ieee company id=0x333333 (fake) */
964 arr[num++] = 0x33;
965 arr[num++] = 0x33;
966 arr[num++] = 0x30;
967 arr[num++] = (dev_id_num >> 24);
968 arr[num++] = (dev_id_num >> 16) & 0xff;
969 arr[num++] = (dev_id_num >> 8) & 0xff;
970 arr[num++] = dev_id_num & 0xff;
971 /* Target relative port number */
972 arr[num++] = 0x61; /* proto=sas, binary */
973 arr[num++] = 0x94; /* PIV=1, target port, rel port */
974 arr[num++] = 0x0; /* reserved */
975 arr[num++] = 0x4; /* length */
976 arr[num++] = 0x0; /* reserved */
977 arr[num++] = 0x0; /* reserved */
978 arr[num++] = 0x0;
979 arr[num++] = 0x1; /* relative port A */
980 }
981 /* NAA-5, Target port identifier */
982 arr[num++] = 0x61; /* proto=sas, binary */
983 arr[num++] = 0x93; /* piv=1, target port, naa */
984 arr[num++] = 0x0;
985 arr[num++] = 0x8;
986 arr[num++] = 0x52; /* naa-5, company id=0x222222 (fake) */
987 arr[num++] = 0x22;
988 arr[num++] = 0x22;
989 arr[num++] = 0x20;
990 arr[num++] = (port_a >> 24);
991 arr[num++] = (port_a >> 16) & 0xff;
992 arr[num++] = (port_a >> 8) & 0xff;
993 arr[num++] = port_a & 0xff;
994 /* NAA-5, Target port group identifier */
995 arr[num++] = 0x61; /* proto=sas, binary */
996 arr[num++] = 0x95; /* piv=1, target port group id */
997 arr[num++] = 0x0;
998 arr[num++] = 0x4;
999 arr[num++] = 0;
1000 arr[num++] = 0;
1001 arr[num++] = (port_group_id >> 8) & 0xff;
1002 arr[num++] = port_group_id & 0xff;
1003 /* NAA-5, Target device identifier */
1004 arr[num++] = 0x61; /* proto=sas, binary */
1005 arr[num++] = 0xa3; /* piv=1, target device, naa */
1006 arr[num++] = 0x0;
1007 arr[num++] = 0x8;
1008 arr[num++] = 0x52; /* naa-5, company id=0x222222 (fake) */
1009 arr[num++] = 0x22;
1010 arr[num++] = 0x22;
1011 arr[num++] = 0x20;
1012 arr[num++] = (target_dev_id >> 24);
1013 arr[num++] = (target_dev_id >> 16) & 0xff;
1014 arr[num++] = (target_dev_id >> 8) & 0xff;
1015 arr[num++] = target_dev_id & 0xff;
1016 /* SCSI name string: Target device identifier */
1017 arr[num++] = 0x63; /* proto=sas, UTF-8 */
1018 arr[num++] = 0xa8; /* piv=1, target device, SCSI name string */
1019 arr[num++] = 0x0;
1020 arr[num++] = 24;
1021 memcpy(arr + num, "naa.52222220", 12);
1022 num += 12;
1023 snprintf(b, sizeof(b), "%08X", target_dev_id);
1024 memcpy(arr + num, b, 8);
1025 num += 8;
1026 memset(arr + num, 0, 4);
1027 num += 4;
1028 return num;
1029 }
1030
1031
1032 static unsigned char vpd84_data[] = {
1033 /* from 4th byte */ 0x22,0x22,0x22,0x0,0xbb,0x0,
1034 0x22,0x22,0x22,0x0,0xbb,0x1,
1035 0x22,0x22,0x22,0x0,0xbb,0x2,
1036 };
1037
1038 /* Software interface identification VPD page */
1039 static int inquiry_evpd_84(unsigned char * arr)
1040 {
1041 memcpy(arr, vpd84_data, sizeof(vpd84_data));
1042 return sizeof(vpd84_data);
1043 }
1044
1045 /* Management network addresses VPD page */
1046 static int inquiry_evpd_85(unsigned char * arr)
1047 {
1048 int num = 0;
1049 const char * na1 = "https://www.kernel.org/config";
1050 const char * na2 = "http://www.kernel.org/log";
1051 int plen, olen;
1052
1053 arr[num++] = 0x1; /* lu, storage config */
1054 arr[num++] = 0x0; /* reserved */
1055 arr[num++] = 0x0;
1056 olen = strlen(na1);
1057 plen = olen + 1;
1058 if (plen % 4)
1059 plen = ((plen / 4) + 1) * 4;
1060 arr[num++] = plen; /* length, null termianted, padded */
1061 memcpy(arr + num, na1, olen);
1062 memset(arr + num + olen, 0, plen - olen);
1063 num += plen;
1064
1065 arr[num++] = 0x4; /* lu, logging */
1066 arr[num++] = 0x0; /* reserved */
1067 arr[num++] = 0x0;
1068 olen = strlen(na2);
1069 plen = olen + 1;
1070 if (plen % 4)
1071 plen = ((plen / 4) + 1) * 4;
1072 arr[num++] = plen; /* length, null terminated, padded */
1073 memcpy(arr + num, na2, olen);
1074 memset(arr + num + olen, 0, plen - olen);
1075 num += plen;
1076
1077 return num;
1078 }
1079
1080 /* SCSI ports VPD page */
1081 static int inquiry_evpd_88(unsigned char * arr, int target_dev_id)
1082 {
1083 int num = 0;
1084 int port_a, port_b;
1085
1086 port_a = target_dev_id + 1;
1087 port_b = port_a + 1;
1088 arr[num++] = 0x0; /* reserved */
1089 arr[num++] = 0x0; /* reserved */
1090 arr[num++] = 0x0;
1091 arr[num++] = 0x1; /* relative port 1 (primary) */
1092 memset(arr + num, 0, 6);
1093 num += 6;
1094 arr[num++] = 0x0;
1095 arr[num++] = 12; /* length tp descriptor */
1096 /* naa-5 target port identifier (A) */
1097 arr[num++] = 0x61; /* proto=sas, binary */
1098 arr[num++] = 0x93; /* PIV=1, target port, NAA */
1099 arr[num++] = 0x0; /* reserved */
1100 arr[num++] = 0x8; /* length */
1101 arr[num++] = 0x52; /* NAA-5, company_id=0x222222 (fake) */
1102 arr[num++] = 0x22;
1103 arr[num++] = 0x22;
1104 arr[num++] = 0x20;
1105 arr[num++] = (port_a >> 24);
1106 arr[num++] = (port_a >> 16) & 0xff;
1107 arr[num++] = (port_a >> 8) & 0xff;
1108 arr[num++] = port_a & 0xff;
1109
1110 arr[num++] = 0x0; /* reserved */
1111 arr[num++] = 0x0; /* reserved */
1112 arr[num++] = 0x0;
1113 arr[num++] = 0x2; /* relative port 2 (secondary) */
1114 memset(arr + num, 0, 6);
1115 num += 6;
1116 arr[num++] = 0x0;
1117 arr[num++] = 12; /* length tp descriptor */
1118 /* naa-5 target port identifier (B) */
1119 arr[num++] = 0x61; /* proto=sas, binary */
1120 arr[num++] = 0x93; /* PIV=1, target port, NAA */
1121 arr[num++] = 0x0; /* reserved */
1122 arr[num++] = 0x8; /* length */
1123 arr[num++] = 0x52; /* NAA-5, company_id=0x222222 (fake) */
1124 arr[num++] = 0x22;
1125 arr[num++] = 0x22;
1126 arr[num++] = 0x20;
1127 arr[num++] = (port_b >> 24);
1128 arr[num++] = (port_b >> 16) & 0xff;
1129 arr[num++] = (port_b >> 8) & 0xff;
1130 arr[num++] = port_b & 0xff;
1131
1132 return num;
1133 }
1134
1135
1136 static unsigned char vpd89_data[] = {
1137 /* from 4th byte */ 0,0,0,0,
1138 'l','i','n','u','x',' ',' ',' ',
1139 'S','A','T',' ','s','c','s','i','_','d','e','b','u','g',' ',' ',
1140 '1','2','3','4',
1141 0x34,0,0,0,1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,
1142 0xec,0,0,0,
1143 0x5a,0xc,0xff,0x3f,0x37,0xc8,0x10,0,0,0,0,0,0x3f,0,0,0,
1144 0,0,0,0,0x58,0x58,0x58,0x58,0x58,0x58,0x58,0x58,0x20,0x20,0x20,0x20,
1145 0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0,0,0,0x40,0x4,0,0x2e,0x33,
1146 0x38,0x31,0x20,0x20,0x20,0x20,0x54,0x53,0x38,0x33,0x30,0x30,0x33,0x31,
1147 0x53,0x41,
1148 0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,
1149 0x20,0x20,
1150 0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,
1151 0x10,0x80,
1152 0,0,0,0x2f,0,0,0,0x2,0,0x2,0x7,0,0xff,0xff,0x1,0,
1153 0x3f,0,0xc1,0xff,0x3e,0,0x10,0x1,0xb0,0xf8,0x50,0x9,0,0,0x7,0,
1154 0x3,0,0x78,0,0x78,0,0xf0,0,0x78,0,0,0,0,0,0,0,
1155 0,0,0,0,0,0,0,0,0x2,0,0,0,0,0,0,0,
1156 0x7e,0,0x1b,0,0x6b,0x34,0x1,0x7d,0x3,0x40,0x69,0x34,0x1,0x3c,0x3,0x40,
1157 0x7f,0x40,0,0,0,0,0xfe,0xfe,0,0,0,0,0,0xfe,0,0,
1158 0,0,0,0,0,0,0,0,0xb0,0xf8,0x50,0x9,0,0,0,0,
1159 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1160 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1161 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1162 0x1,0,0xb0,0xf8,0x50,0x9,0xb0,0xf8,0x50,0x9,0x20,0x20,0x2,0,0xb6,0x42,
1163 0,0x80,0x8a,0,0x6,0x3c,0xa,0x3c,0xff,0xff,0xc6,0x7,0,0x1,0,0x8,
1164 0xf0,0xf,0,0x10,0x2,0,0x30,0,0,0,0,0,0,0,0x6,0xfe,
1165 0,0,0x2,0,0x50,0,0x8a,0,0x4f,0x95,0,0,0x21,0,0xb,0,
1166 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1167 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1168 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1169 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1170 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1171 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1172 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1173 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1174 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1175 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1176 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1177 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0xa5,0x51,
1178 };
1179
1180 /* ATA Information VPD page */
1181 static int inquiry_evpd_89(unsigned char * arr)
1182 {
1183 memcpy(arr, vpd89_data, sizeof(vpd89_data));
1184 return sizeof(vpd89_data);
1185 }
1186
1187
1188 static unsigned char vpdb0_data[] = {
1189 /* from 4th byte */ 0,0,0,4, 0,0,0x4,0, 0,0,0,64,
1190 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1191 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1192 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1193 };
1194
1195 /* Block limits VPD page (SBC-3) */
1196 static int inquiry_evpd_b0(unsigned char * arr)
1197 {
1198 unsigned int gran;
1199
1200 memcpy(arr, vpdb0_data, sizeof(vpdb0_data));
1201
1202 /* Optimal transfer length granularity */
1203 gran = 1 << scsi_debug_physblk_exp;
1204 arr[2] = (gran >> 8) & 0xff;
1205 arr[3] = gran & 0xff;
1206
1207 /* Maximum Transfer Length */
1208 if (sdebug_store_sectors > 0x400) {
1209 arr[4] = (sdebug_store_sectors >> 24) & 0xff;
1210 arr[5] = (sdebug_store_sectors >> 16) & 0xff;
1211 arr[6] = (sdebug_store_sectors >> 8) & 0xff;
1212 arr[7] = sdebug_store_sectors & 0xff;
1213 }
1214
1215 /* Optimal Transfer Length */
1216 put_unaligned_be32(scsi_debug_opt_blks, &arr[8]);
1217
1218 if (scsi_debug_lbpu) {
1219 /* Maximum Unmap LBA Count */
1220 put_unaligned_be32(scsi_debug_unmap_max_blocks, &arr[16]);
1221
1222 /* Maximum Unmap Block Descriptor Count */
1223 put_unaligned_be32(scsi_debug_unmap_max_desc, &arr[20]);
1224 }
1225
1226 /* Unmap Granularity Alignment */
1227 if (scsi_debug_unmap_alignment) {
1228 put_unaligned_be32(scsi_debug_unmap_alignment, &arr[28]);
1229 arr[28] |= 0x80; /* UGAVALID */
1230 }
1231
1232 /* Optimal Unmap Granularity */
1233 put_unaligned_be32(scsi_debug_unmap_granularity, &arr[24]);
1234
1235 /* Maximum WRITE SAME Length */
1236 put_unaligned_be64(scsi_debug_write_same_length, &arr[32]);
1237
1238 return 0x3c; /* Mandatory page length for Logical Block Provisioning */
1239
1240 return sizeof(vpdb0_data);
1241 }
1242
1243 /* Block device characteristics VPD page (SBC-3) */
1244 static int inquiry_evpd_b1(unsigned char *arr)
1245 {
1246 memset(arr, 0, 0x3c);
1247 arr[0] = 0;
1248 arr[1] = 1; /* non rotating medium (e.g. solid state) */
1249 arr[2] = 0;
1250 arr[3] = 5; /* less than 1.8" */
1251
1252 return 0x3c;
1253 }
1254
1255 /* Logical block provisioning VPD page (SBC-3) */
1256 static int inquiry_evpd_b2(unsigned char *arr)
1257 {
1258 memset(arr, 0, 0x4);
1259 arr[0] = 0; /* threshold exponent */
1260
1261 if (scsi_debug_lbpu)
1262 arr[1] = 1 << 7;
1263
1264 if (scsi_debug_lbpws)
1265 arr[1] |= 1 << 6;
1266
1267 if (scsi_debug_lbpws10)
1268 arr[1] |= 1 << 5;
1269
1270 if (scsi_debug_lbprz)
1271 arr[1] |= 1 << 2;
1272
1273 return 0x4;
1274 }
1275
1276 #define SDEBUG_LONG_INQ_SZ 96
1277 #define SDEBUG_MAX_INQ_ARR_SZ 584
1278
1279 static int resp_inquiry(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
1280 {
1281 unsigned char pq_pdt;
1282 unsigned char * arr;
1283 unsigned char *cmd = scp->cmnd;
1284 int alloc_len, n, ret;
1285 bool have_wlun;
1286
1287 alloc_len = (cmd[3] << 8) + cmd[4];
1288 arr = kzalloc(SDEBUG_MAX_INQ_ARR_SZ, GFP_ATOMIC);
1289 if (! arr)
1290 return DID_REQUEUE << 16;
1291 have_wlun = (scp->device->lun == SAM2_WLUN_REPORT_LUNS);
1292 if (have_wlun)
1293 pq_pdt = 0x1e; /* present, wlun */
1294 else if (scsi_debug_no_lun_0 && (0 == devip->lun))
1295 pq_pdt = 0x7f; /* not present, no device type */
1296 else
1297 pq_pdt = (scsi_debug_ptype & 0x1f);
1298 arr[0] = pq_pdt;
1299 if (0x2 & cmd[1]) { /* CMDDT bit set */
1300 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 1);
1301 kfree(arr);
1302 return check_condition_result;
1303 } else if (0x1 & cmd[1]) { /* EVPD bit set */
1304 int lu_id_num, port_group_id, target_dev_id, len;
1305 char lu_id_str[6];
1306 int host_no = devip->sdbg_host->shost->host_no;
1307
1308 port_group_id = (((host_no + 1) & 0x7f) << 8) +
1309 (devip->channel & 0x7f);
1310 if (0 == scsi_debug_vpd_use_hostno)
1311 host_no = 0;
1312 lu_id_num = have_wlun ? -1 : (((host_no + 1) * 2000) +
1313 (devip->target * 1000) + devip->lun);
1314 target_dev_id = ((host_no + 1) * 2000) +
1315 (devip->target * 1000) - 3;
1316 len = scnprintf(lu_id_str, 6, "%d", lu_id_num);
1317 if (0 == cmd[2]) { /* supported vital product data pages */
1318 arr[1] = cmd[2]; /*sanity */
1319 n = 4;
1320 arr[n++] = 0x0; /* this page */
1321 arr[n++] = 0x80; /* unit serial number */
1322 arr[n++] = 0x83; /* device identification */
1323 arr[n++] = 0x84; /* software interface ident. */
1324 arr[n++] = 0x85; /* management network addresses */
1325 arr[n++] = 0x86; /* extended inquiry */
1326 arr[n++] = 0x87; /* mode page policy */
1327 arr[n++] = 0x88; /* SCSI ports */
1328 arr[n++] = 0x89; /* ATA information */
1329 arr[n++] = 0xb0; /* Block limits (SBC) */
1330 arr[n++] = 0xb1; /* Block characteristics (SBC) */
1331 if (scsi_debug_lbp()) /* Logical Block Prov. (SBC) */
1332 arr[n++] = 0xb2;
1333 arr[3] = n - 4; /* number of supported VPD pages */
1334 } else if (0x80 == cmd[2]) { /* unit serial number */
1335 arr[1] = cmd[2]; /*sanity */
1336 arr[3] = len;
1337 memcpy(&arr[4], lu_id_str, len);
1338 } else if (0x83 == cmd[2]) { /* device identification */
1339 arr[1] = cmd[2]; /*sanity */
1340 arr[3] = inquiry_evpd_83(&arr[4], port_group_id,
1341 target_dev_id, lu_id_num,
1342 lu_id_str, len);
1343 } else if (0x84 == cmd[2]) { /* Software interface ident. */
1344 arr[1] = cmd[2]; /*sanity */
1345 arr[3] = inquiry_evpd_84(&arr[4]);
1346 } else if (0x85 == cmd[2]) { /* Management network addresses */
1347 arr[1] = cmd[2]; /*sanity */
1348 arr[3] = inquiry_evpd_85(&arr[4]);
1349 } else if (0x86 == cmd[2]) { /* extended inquiry */
1350 arr[1] = cmd[2]; /*sanity */
1351 arr[3] = 0x3c; /* number of following entries */
1352 if (scsi_debug_dif == SD_DIF_TYPE3_PROTECTION)
1353 arr[4] = 0x4; /* SPT: GRD_CHK:1 */
1354 else if (scsi_debug_dif)
1355 arr[4] = 0x5; /* SPT: GRD_CHK:1, REF_CHK:1 */
1356 else
1357 arr[4] = 0x0; /* no protection stuff */
1358 arr[5] = 0x7; /* head of q, ordered + simple q's */
1359 } else if (0x87 == cmd[2]) { /* mode page policy */
1360 arr[1] = cmd[2]; /*sanity */
1361 arr[3] = 0x8; /* number of following entries */
1362 arr[4] = 0x2; /* disconnect-reconnect mp */
1363 arr[6] = 0x80; /* mlus, shared */
1364 arr[8] = 0x18; /* protocol specific lu */
1365 arr[10] = 0x82; /* mlus, per initiator port */
1366 } else if (0x88 == cmd[2]) { /* SCSI Ports */
1367 arr[1] = cmd[2]; /*sanity */
1368 arr[3] = inquiry_evpd_88(&arr[4], target_dev_id);
1369 } else if (0x89 == cmd[2]) { /* ATA information */
1370 arr[1] = cmd[2]; /*sanity */
1371 n = inquiry_evpd_89(&arr[4]);
1372 arr[2] = (n >> 8);
1373 arr[3] = (n & 0xff);
1374 } else if (0xb0 == cmd[2]) { /* Block limits (SBC) */
1375 arr[1] = cmd[2]; /*sanity */
1376 arr[3] = inquiry_evpd_b0(&arr[4]);
1377 } else if (0xb1 == cmd[2]) { /* Block characteristics (SBC) */
1378 arr[1] = cmd[2]; /*sanity */
1379 arr[3] = inquiry_evpd_b1(&arr[4]);
1380 } else if (0xb2 == cmd[2]) { /* Logical Block Prov. (SBC) */
1381 arr[1] = cmd[2]; /*sanity */
1382 arr[3] = inquiry_evpd_b2(&arr[4]);
1383 } else {
1384 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, -1);
1385 kfree(arr);
1386 return check_condition_result;
1387 }
1388 len = min(((arr[2] << 8) + arr[3]) + 4, alloc_len);
1389 ret = fill_from_dev_buffer(scp, arr,
1390 min(len, SDEBUG_MAX_INQ_ARR_SZ));
1391 kfree(arr);
1392 return ret;
1393 }
1394 /* drops through here for a standard inquiry */
1395 arr[1] = scsi_debug_removable ? 0x80 : 0; /* Removable disk */
1396 arr[2] = scsi_debug_scsi_level;
1397 arr[3] = 2; /* response_data_format==2 */
1398 arr[4] = SDEBUG_LONG_INQ_SZ - 5;
1399 arr[5] = scsi_debug_dif ? 1 : 0; /* PROTECT bit */
1400 if (0 == scsi_debug_vpd_use_hostno)
1401 arr[5] = 0x10; /* claim: implicit TGPS */
1402 arr[6] = 0x10; /* claim: MultiP */
1403 /* arr[6] |= 0x40; ... claim: EncServ (enclosure services) */
1404 arr[7] = 0xa; /* claim: LINKED + CMDQUE */
1405 memcpy(&arr[8], inq_vendor_id, 8);
1406 memcpy(&arr[16], inq_product_id, 16);
1407 memcpy(&arr[32], inq_product_rev, 4);
1408 /* version descriptors (2 bytes each) follow */
1409 arr[58] = 0x0; arr[59] = 0xa2; /* SAM-5 rev 4 */
1410 arr[60] = 0x4; arr[61] = 0x68; /* SPC-4 rev 37 */
1411 n = 62;
1412 if (scsi_debug_ptype == 0) {
1413 arr[n++] = 0x4; arr[n++] = 0xc5; /* SBC-4 rev 36 */
1414 } else if (scsi_debug_ptype == 1) {
1415 arr[n++] = 0x5; arr[n++] = 0x25; /* SSC-4 rev 3 */
1416 }
1417 arr[n++] = 0x20; arr[n++] = 0xe6; /* SPL-3 rev 7 */
1418 ret = fill_from_dev_buffer(scp, arr,
1419 min(alloc_len, SDEBUG_LONG_INQ_SZ));
1420 kfree(arr);
1421 return ret;
1422 }
1423
1424 static int resp_requests(struct scsi_cmnd * scp,
1425 struct sdebug_dev_info * devip)
1426 {
1427 unsigned char * sbuff;
1428 unsigned char *cmd = scp->cmnd;
1429 unsigned char arr[SCSI_SENSE_BUFFERSIZE];
1430 bool dsense, want_dsense;
1431 int len = 18;
1432
1433 memset(arr, 0, sizeof(arr));
1434 dsense = !!(cmd[1] & 1);
1435 want_dsense = dsense || scsi_debug_dsense;
1436 sbuff = scp->sense_buffer;
1437 if ((iec_m_pg[2] & 0x4) && (6 == (iec_m_pg[3] & 0xf))) {
1438 if (dsense) {
1439 arr[0] = 0x72;
1440 arr[1] = 0x0; /* NO_SENSE in sense_key */
1441 arr[2] = THRESHOLD_EXCEEDED;
1442 arr[3] = 0xff; /* TEST set and MRIE==6 */
1443 len = 8;
1444 } else {
1445 arr[0] = 0x70;
1446 arr[2] = 0x0; /* NO_SENSE in sense_key */
1447 arr[7] = 0xa; /* 18 byte sense buffer */
1448 arr[12] = THRESHOLD_EXCEEDED;
1449 arr[13] = 0xff; /* TEST set and MRIE==6 */
1450 }
1451 } else {
1452 memcpy(arr, sbuff, SCSI_SENSE_BUFFERSIZE);
1453 if (arr[0] >= 0x70 && dsense == scsi_debug_dsense)
1454 ; /* have sense and formats match */
1455 else if (arr[0] <= 0x70) {
1456 if (dsense) {
1457 memset(arr, 0, 8);
1458 arr[0] = 0x72;
1459 len = 8;
1460 } else {
1461 memset(arr, 0, 18);
1462 arr[0] = 0x70;
1463 arr[7] = 0xa;
1464 }
1465 } else if (dsense) {
1466 memset(arr, 0, 8);
1467 arr[0] = 0x72;
1468 arr[1] = sbuff[2]; /* sense key */
1469 arr[2] = sbuff[12]; /* asc */
1470 arr[3] = sbuff[13]; /* ascq */
1471 len = 8;
1472 } else {
1473 memset(arr, 0, 18);
1474 arr[0] = 0x70;
1475 arr[2] = sbuff[1];
1476 arr[7] = 0xa;
1477 arr[12] = sbuff[1];
1478 arr[13] = sbuff[3];
1479 }
1480
1481 }
1482 mk_sense_buffer(scp, 0, NO_ADDITIONAL_SENSE, 0);
1483 return fill_from_dev_buffer(scp, arr, len);
1484 }
1485
1486 static int resp_start_stop(struct scsi_cmnd * scp,
1487 struct sdebug_dev_info * devip)
1488 {
1489 unsigned char *cmd = scp->cmnd;
1490 int power_cond, start;
1491
1492 power_cond = (cmd[4] & 0xf0) >> 4;
1493 if (power_cond) {
1494 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 4, 7);
1495 return check_condition_result;
1496 }
1497 start = cmd[4] & 1;
1498 if (start == devip->stopped)
1499 devip->stopped = !start;
1500 return 0;
1501 }
1502
1503 static sector_t get_sdebug_capacity(void)
1504 {
1505 if (scsi_debug_virtual_gb > 0)
1506 return (sector_t)scsi_debug_virtual_gb *
1507 (1073741824 / scsi_debug_sector_size);
1508 else
1509 return sdebug_store_sectors;
1510 }
1511
1512 #define SDEBUG_READCAP_ARR_SZ 8
1513 static int resp_readcap(struct scsi_cmnd * scp,
1514 struct sdebug_dev_info * devip)
1515 {
1516 unsigned char arr[SDEBUG_READCAP_ARR_SZ];
1517 unsigned int capac;
1518
1519 /* following just in case virtual_gb changed */
1520 sdebug_capacity = get_sdebug_capacity();
1521 memset(arr, 0, SDEBUG_READCAP_ARR_SZ);
1522 if (sdebug_capacity < 0xffffffff) {
1523 capac = (unsigned int)sdebug_capacity - 1;
1524 arr[0] = (capac >> 24);
1525 arr[1] = (capac >> 16) & 0xff;
1526 arr[2] = (capac >> 8) & 0xff;
1527 arr[3] = capac & 0xff;
1528 } else {
1529 arr[0] = 0xff;
1530 arr[1] = 0xff;
1531 arr[2] = 0xff;
1532 arr[3] = 0xff;
1533 }
1534 arr[6] = (scsi_debug_sector_size >> 8) & 0xff;
1535 arr[7] = scsi_debug_sector_size & 0xff;
1536 return fill_from_dev_buffer(scp, arr, SDEBUG_READCAP_ARR_SZ);
1537 }
1538
1539 #define SDEBUG_READCAP16_ARR_SZ 32
1540 static int resp_readcap16(struct scsi_cmnd * scp,
1541 struct sdebug_dev_info * devip)
1542 {
1543 unsigned char *cmd = scp->cmnd;
1544 unsigned char arr[SDEBUG_READCAP16_ARR_SZ];
1545 unsigned long long capac;
1546 int k, alloc_len;
1547
1548 alloc_len = ((cmd[10] << 24) + (cmd[11] << 16) + (cmd[12] << 8)
1549 + cmd[13]);
1550 /* following just in case virtual_gb changed */
1551 sdebug_capacity = get_sdebug_capacity();
1552 memset(arr, 0, SDEBUG_READCAP16_ARR_SZ);
1553 capac = sdebug_capacity - 1;
1554 for (k = 0; k < 8; ++k, capac >>= 8)
1555 arr[7 - k] = capac & 0xff;
1556 arr[8] = (scsi_debug_sector_size >> 24) & 0xff;
1557 arr[9] = (scsi_debug_sector_size >> 16) & 0xff;
1558 arr[10] = (scsi_debug_sector_size >> 8) & 0xff;
1559 arr[11] = scsi_debug_sector_size & 0xff;
1560 arr[13] = scsi_debug_physblk_exp & 0xf;
1561 arr[14] = (scsi_debug_lowest_aligned >> 8) & 0x3f;
1562
1563 if (scsi_debug_lbp()) {
1564 arr[14] |= 0x80; /* LBPME */
1565 if (scsi_debug_lbprz)
1566 arr[14] |= 0x40; /* LBPRZ */
1567 }
1568
1569 arr[15] = scsi_debug_lowest_aligned & 0xff;
1570
1571 if (scsi_debug_dif) {
1572 arr[12] = (scsi_debug_dif - 1) << 1; /* P_TYPE */
1573 arr[12] |= 1; /* PROT_EN */
1574 }
1575
1576 return fill_from_dev_buffer(scp, arr,
1577 min(alloc_len, SDEBUG_READCAP16_ARR_SZ));
1578 }
1579
1580 #define SDEBUG_MAX_TGTPGS_ARR_SZ 1412
1581
1582 static int resp_report_tgtpgs(struct scsi_cmnd * scp,
1583 struct sdebug_dev_info * devip)
1584 {
1585 unsigned char *cmd = scp->cmnd;
1586 unsigned char * arr;
1587 int host_no = devip->sdbg_host->shost->host_no;
1588 int n, ret, alen, rlen;
1589 int port_group_a, port_group_b, port_a, port_b;
1590
1591 alen = ((cmd[6] << 24) + (cmd[7] << 16) + (cmd[8] << 8)
1592 + cmd[9]);
1593
1594 arr = kzalloc(SDEBUG_MAX_TGTPGS_ARR_SZ, GFP_ATOMIC);
1595 if (! arr)
1596 return DID_REQUEUE << 16;
1597 /*
1598 * EVPD page 0x88 states we have two ports, one
1599 * real and a fake port with no device connected.
1600 * So we create two port groups with one port each
1601 * and set the group with port B to unavailable.
1602 */
1603 port_a = 0x1; /* relative port A */
1604 port_b = 0x2; /* relative port B */
1605 port_group_a = (((host_no + 1) & 0x7f) << 8) +
1606 (devip->channel & 0x7f);
1607 port_group_b = (((host_no + 1) & 0x7f) << 8) +
1608 (devip->channel & 0x7f) + 0x80;
1609
1610 /*
1611 * The asymmetric access state is cycled according to the host_id.
1612 */
1613 n = 4;
1614 if (0 == scsi_debug_vpd_use_hostno) {
1615 arr[n++] = host_no % 3; /* Asymm access state */
1616 arr[n++] = 0x0F; /* claim: all states are supported */
1617 } else {
1618 arr[n++] = 0x0; /* Active/Optimized path */
1619 arr[n++] = 0x01; /* claim: only support active/optimized paths */
1620 }
1621 arr[n++] = (port_group_a >> 8) & 0xff;
1622 arr[n++] = port_group_a & 0xff;
1623 arr[n++] = 0; /* Reserved */
1624 arr[n++] = 0; /* Status code */
1625 arr[n++] = 0; /* Vendor unique */
1626 arr[n++] = 0x1; /* One port per group */
1627 arr[n++] = 0; /* Reserved */
1628 arr[n++] = 0; /* Reserved */
1629 arr[n++] = (port_a >> 8) & 0xff;
1630 arr[n++] = port_a & 0xff;
1631 arr[n++] = 3; /* Port unavailable */
1632 arr[n++] = 0x08; /* claim: only unavailalbe paths are supported */
1633 arr[n++] = (port_group_b >> 8) & 0xff;
1634 arr[n++] = port_group_b & 0xff;
1635 arr[n++] = 0; /* Reserved */
1636 arr[n++] = 0; /* Status code */
1637 arr[n++] = 0; /* Vendor unique */
1638 arr[n++] = 0x1; /* One port per group */
1639 arr[n++] = 0; /* Reserved */
1640 arr[n++] = 0; /* Reserved */
1641 arr[n++] = (port_b >> 8) & 0xff;
1642 arr[n++] = port_b & 0xff;
1643
1644 rlen = n - 4;
1645 arr[0] = (rlen >> 24) & 0xff;
1646 arr[1] = (rlen >> 16) & 0xff;
1647 arr[2] = (rlen >> 8) & 0xff;
1648 arr[3] = rlen & 0xff;
1649
1650 /*
1651 * Return the smallest value of either
1652 * - The allocated length
1653 * - The constructed command length
1654 * - The maximum array size
1655 */
1656 rlen = min(alen,n);
1657 ret = fill_from_dev_buffer(scp, arr,
1658 min(rlen, SDEBUG_MAX_TGTPGS_ARR_SZ));
1659 kfree(arr);
1660 return ret;
1661 }
1662
1663 static int
1664 resp_rsup_opcodes(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
1665 {
1666 bool rctd;
1667 u8 reporting_opts, req_opcode, sdeb_i, supp;
1668 u16 req_sa, u;
1669 u32 alloc_len, a_len;
1670 int k, offset, len, errsts, count, bump, na;
1671 const struct opcode_info_t *oip;
1672 const struct opcode_info_t *r_oip;
1673 u8 *arr;
1674 u8 *cmd = scp->cmnd;
1675
1676 rctd = !!(cmd[2] & 0x80);
1677 reporting_opts = cmd[2] & 0x7;
1678 req_opcode = cmd[3];
1679 req_sa = get_unaligned_be16(cmd + 4);
1680 alloc_len = get_unaligned_be32(cmd + 6);
1681 if (alloc_len < 4 || alloc_len > 0xffff) {
1682 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 6, -1);
1683 return check_condition_result;
1684 }
1685 if (alloc_len > 8192)
1686 a_len = 8192;
1687 else
1688 a_len = alloc_len;
1689 arr = kzalloc((a_len < 256) ? 320 : a_len + 64, GFP_ATOMIC);
1690 if (NULL == arr) {
1691 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
1692 INSUFF_RES_ASCQ);
1693 return check_condition_result;
1694 }
1695 switch (reporting_opts) {
1696 case 0: /* all commands */
1697 /* count number of commands */
1698 for (count = 0, oip = opcode_info_arr;
1699 oip->num_attached != 0xff; ++oip) {
1700 if (F_INV_OP & oip->flags)
1701 continue;
1702 count += (oip->num_attached + 1);
1703 }
1704 bump = rctd ? 20 : 8;
1705 put_unaligned_be32(count * bump, arr);
1706 for (offset = 4, oip = opcode_info_arr;
1707 oip->num_attached != 0xff && offset < a_len; ++oip) {
1708 if (F_INV_OP & oip->flags)
1709 continue;
1710 na = oip->num_attached;
1711 arr[offset] = oip->opcode;
1712 put_unaligned_be16(oip->sa, arr + offset + 2);
1713 if (rctd)
1714 arr[offset + 5] |= 0x2;
1715 if (FF_SA & oip->flags)
1716 arr[offset + 5] |= 0x1;
1717 put_unaligned_be16(oip->len_mask[0], arr + offset + 6);
1718 if (rctd)
1719 put_unaligned_be16(0xa, arr + offset + 8);
1720 r_oip = oip;
1721 for (k = 0, oip = oip->arrp; k < na; ++k, ++oip) {
1722 if (F_INV_OP & oip->flags)
1723 continue;
1724 offset += bump;
1725 arr[offset] = oip->opcode;
1726 put_unaligned_be16(oip->sa, arr + offset + 2);
1727 if (rctd)
1728 arr[offset + 5] |= 0x2;
1729 if (FF_SA & oip->flags)
1730 arr[offset + 5] |= 0x1;
1731 put_unaligned_be16(oip->len_mask[0],
1732 arr + offset + 6);
1733 if (rctd)
1734 put_unaligned_be16(0xa,
1735 arr + offset + 8);
1736 }
1737 oip = r_oip;
1738 offset += bump;
1739 }
1740 break;
1741 case 1: /* one command: opcode only */
1742 case 2: /* one command: opcode plus service action */
1743 case 3: /* one command: if sa==0 then opcode only else opcode+sa */
1744 sdeb_i = opcode_ind_arr[req_opcode];
1745 oip = &opcode_info_arr[sdeb_i];
1746 if (F_INV_OP & oip->flags) {
1747 supp = 1;
1748 offset = 4;
1749 } else {
1750 if (1 == reporting_opts) {
1751 if (FF_SA & oip->flags) {
1752 mk_sense_invalid_fld(scp, SDEB_IN_CDB,
1753 2, 2);
1754 kfree(arr);
1755 return check_condition_result;
1756 }
1757 req_sa = 0;
1758 } else if (2 == reporting_opts &&
1759 0 == (FF_SA & oip->flags)) {
1760 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 4, -1);
1761 kfree(arr); /* point at requested sa */
1762 return check_condition_result;
1763 }
1764 if (0 == (FF_SA & oip->flags) &&
1765 req_opcode == oip->opcode)
1766 supp = 3;
1767 else if (0 == (FF_SA & oip->flags)) {
1768 na = oip->num_attached;
1769 for (k = 0, oip = oip->arrp; k < na;
1770 ++k, ++oip) {
1771 if (req_opcode == oip->opcode)
1772 break;
1773 }
1774 supp = (k >= na) ? 1 : 3;
1775 } else if (req_sa != oip->sa) {
1776 na = oip->num_attached;
1777 for (k = 0, oip = oip->arrp; k < na;
1778 ++k, ++oip) {
1779 if (req_sa == oip->sa)
1780 break;
1781 }
1782 supp = (k >= na) ? 1 : 3;
1783 } else
1784 supp = 3;
1785 if (3 == supp) {
1786 u = oip->len_mask[0];
1787 put_unaligned_be16(u, arr + 2);
1788 arr[4] = oip->opcode;
1789 for (k = 1; k < u; ++k)
1790 arr[4 + k] = (k < 16) ?
1791 oip->len_mask[k] : 0xff;
1792 offset = 4 + u;
1793 } else
1794 offset = 4;
1795 }
1796 arr[1] = (rctd ? 0x80 : 0) | supp;
1797 if (rctd) {
1798 put_unaligned_be16(0xa, arr + offset);
1799 offset += 12;
1800 }
1801 break;
1802 default:
1803 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 2);
1804 kfree(arr);
1805 return check_condition_result;
1806 }
1807 offset = (offset < a_len) ? offset : a_len;
1808 len = (offset < alloc_len) ? offset : alloc_len;
1809 errsts = fill_from_dev_buffer(scp, arr, len);
1810 kfree(arr);
1811 return errsts;
1812 }
1813
1814 static int
1815 resp_rsup_tmfs(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
1816 {
1817 bool repd;
1818 u32 alloc_len, len;
1819 u8 arr[16];
1820 u8 *cmd = scp->cmnd;
1821
1822 memset(arr, 0, sizeof(arr));
1823 repd = !!(cmd[2] & 0x80);
1824 alloc_len = get_unaligned_be32(cmd + 6);
1825 if (alloc_len < 4) {
1826 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 6, -1);
1827 return check_condition_result;
1828 }
1829 arr[0] = 0xc8; /* ATS | ATSS | LURS */
1830 arr[1] = 0x1; /* ITNRS */
1831 if (repd) {
1832 arr[3] = 0xc;
1833 len = 16;
1834 } else
1835 len = 4;
1836
1837 len = (len < alloc_len) ? len : alloc_len;
1838 return fill_from_dev_buffer(scp, arr, len);
1839 }
1840
1841 /* <<Following mode page info copied from ST318451LW>> */
1842
1843 static int resp_err_recov_pg(unsigned char * p, int pcontrol, int target)
1844 { /* Read-Write Error Recovery page for mode_sense */
1845 unsigned char err_recov_pg[] = {0x1, 0xa, 0xc0, 11, 240, 0, 0, 0,
1846 5, 0, 0xff, 0xff};
1847
1848 memcpy(p, err_recov_pg, sizeof(err_recov_pg));
1849 if (1 == pcontrol)
1850 memset(p + 2, 0, sizeof(err_recov_pg) - 2);
1851 return sizeof(err_recov_pg);
1852 }
1853
1854 static int resp_disconnect_pg(unsigned char * p, int pcontrol, int target)
1855 { /* Disconnect-Reconnect page for mode_sense */
1856 unsigned char disconnect_pg[] = {0x2, 0xe, 128, 128, 0, 10, 0, 0,
1857 0, 0, 0, 0, 0, 0, 0, 0};
1858
1859 memcpy(p, disconnect_pg, sizeof(disconnect_pg));
1860 if (1 == pcontrol)
1861 memset(p + 2, 0, sizeof(disconnect_pg) - 2);
1862 return sizeof(disconnect_pg);
1863 }
1864
1865 static int resp_format_pg(unsigned char * p, int pcontrol, int target)
1866 { /* Format device page for mode_sense */
1867 unsigned char format_pg[] = {0x3, 0x16, 0, 0, 0, 0, 0, 0,
1868 0, 0, 0, 0, 0, 0, 0, 0,
1869 0, 0, 0, 0, 0x40, 0, 0, 0};
1870
1871 memcpy(p, format_pg, sizeof(format_pg));
1872 p[10] = (sdebug_sectors_per >> 8) & 0xff;
1873 p[11] = sdebug_sectors_per & 0xff;
1874 p[12] = (scsi_debug_sector_size >> 8) & 0xff;
1875 p[13] = scsi_debug_sector_size & 0xff;
1876 if (scsi_debug_removable)
1877 p[20] |= 0x20; /* should agree with INQUIRY */
1878 if (1 == pcontrol)
1879 memset(p + 2, 0, sizeof(format_pg) - 2);
1880 return sizeof(format_pg);
1881 }
1882
1883 static int resp_caching_pg(unsigned char * p, int pcontrol, int target)
1884 { /* Caching page for mode_sense */
1885 unsigned char ch_caching_pg[] = {/* 0x8, 18, */ 0x4, 0, 0, 0, 0, 0,
1886 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
1887 unsigned char d_caching_pg[] = {0x8, 18, 0x14, 0, 0xff, 0xff, 0, 0,
1888 0xff, 0xff, 0xff, 0xff, 0x80, 0x14, 0, 0, 0, 0, 0, 0};
1889
1890 if (SCSI_DEBUG_OPT_N_WCE & scsi_debug_opts)
1891 caching_pg[2] &= ~0x4; /* set WCE=0 (default WCE=1) */
1892 memcpy(p, caching_pg, sizeof(caching_pg));
1893 if (1 == pcontrol)
1894 memcpy(p + 2, ch_caching_pg, sizeof(ch_caching_pg));
1895 else if (2 == pcontrol)
1896 memcpy(p, d_caching_pg, sizeof(d_caching_pg));
1897 return sizeof(caching_pg);
1898 }
1899
1900 static int resp_ctrl_m_pg(unsigned char * p, int pcontrol, int target)
1901 { /* Control mode page for mode_sense */
1902 unsigned char ch_ctrl_m_pg[] = {/* 0xa, 10, */ 0x6, 0, 0, 0, 0, 0,
1903 0, 0, 0, 0};
1904 unsigned char d_ctrl_m_pg[] = {0xa, 10, 2, 0, 0, 0, 0, 0,
1905 0, 0, 0x2, 0x4b};
1906
1907 if (scsi_debug_dsense)
1908 ctrl_m_pg[2] |= 0x4;
1909 else
1910 ctrl_m_pg[2] &= ~0x4;
1911
1912 if (scsi_debug_ato)
1913 ctrl_m_pg[5] |= 0x80; /* ATO=1 */
1914
1915 memcpy(p, ctrl_m_pg, sizeof(ctrl_m_pg));
1916 if (1 == pcontrol)
1917 memcpy(p + 2, ch_ctrl_m_pg, sizeof(ch_ctrl_m_pg));
1918 else if (2 == pcontrol)
1919 memcpy(p, d_ctrl_m_pg, sizeof(d_ctrl_m_pg));
1920 return sizeof(ctrl_m_pg);
1921 }
1922
1923
1924 static int resp_iec_m_pg(unsigned char * p, int pcontrol, int target)
1925 { /* Informational Exceptions control mode page for mode_sense */
1926 unsigned char ch_iec_m_pg[] = {/* 0x1c, 0xa, */ 0x4, 0xf, 0, 0, 0, 0,
1927 0, 0, 0x0, 0x0};
1928 unsigned char d_iec_m_pg[] = {0x1c, 0xa, 0x08, 0, 0, 0, 0, 0,
1929 0, 0, 0x0, 0x0};
1930
1931 memcpy(p, iec_m_pg, sizeof(iec_m_pg));
1932 if (1 == pcontrol)
1933 memcpy(p + 2, ch_iec_m_pg, sizeof(ch_iec_m_pg));
1934 else if (2 == pcontrol)
1935 memcpy(p, d_iec_m_pg, sizeof(d_iec_m_pg));
1936 return sizeof(iec_m_pg);
1937 }
1938
1939 static int resp_sas_sf_m_pg(unsigned char * p, int pcontrol, int target)
1940 { /* SAS SSP mode page - short format for mode_sense */
1941 unsigned char sas_sf_m_pg[] = {0x19, 0x6,
1942 0x6, 0x0, 0x7, 0xd0, 0x0, 0x0};
1943
1944 memcpy(p, sas_sf_m_pg, sizeof(sas_sf_m_pg));
1945 if (1 == pcontrol)
1946 memset(p + 2, 0, sizeof(sas_sf_m_pg) - 2);
1947 return sizeof(sas_sf_m_pg);
1948 }
1949
1950
1951 static int resp_sas_pcd_m_spg(unsigned char * p, int pcontrol, int target,
1952 int target_dev_id)
1953 { /* SAS phy control and discover mode page for mode_sense */
1954 unsigned char sas_pcd_m_pg[] = {0x59, 0x1, 0, 0x64, 0, 0x6, 0, 2,
1955 0, 0, 0, 0, 0x10, 0x9, 0x8, 0x0,
1956 0x52, 0x22, 0x22, 0x20, 0x0, 0x0, 0x0, 0x0,
1957 0x51, 0x11, 0x11, 0x10, 0x0, 0x0, 0x0, 0x1,
1958 0x2, 0, 0, 0, 0, 0, 0, 0,
1959 0x88, 0x99, 0, 0, 0, 0, 0, 0,
1960 0, 0, 0, 0, 0, 0, 0, 0,
1961 0, 1, 0, 0, 0x10, 0x9, 0x8, 0x0,
1962 0x52, 0x22, 0x22, 0x20, 0x0, 0x0, 0x0, 0x0,
1963 0x51, 0x11, 0x11, 0x10, 0x0, 0x0, 0x0, 0x1,
1964 0x3, 0, 0, 0, 0, 0, 0, 0,
1965 0x88, 0x99, 0, 0, 0, 0, 0, 0,
1966 0, 0, 0, 0, 0, 0, 0, 0,
1967 };
1968 int port_a, port_b;
1969
1970 port_a = target_dev_id + 1;
1971 port_b = port_a + 1;
1972 memcpy(p, sas_pcd_m_pg, sizeof(sas_pcd_m_pg));
1973 p[20] = (port_a >> 24);
1974 p[21] = (port_a >> 16) & 0xff;
1975 p[22] = (port_a >> 8) & 0xff;
1976 p[23] = port_a & 0xff;
1977 p[48 + 20] = (port_b >> 24);
1978 p[48 + 21] = (port_b >> 16) & 0xff;
1979 p[48 + 22] = (port_b >> 8) & 0xff;
1980 p[48 + 23] = port_b & 0xff;
1981 if (1 == pcontrol)
1982 memset(p + 4, 0, sizeof(sas_pcd_m_pg) - 4);
1983 return sizeof(sas_pcd_m_pg);
1984 }
1985
1986 static int resp_sas_sha_m_spg(unsigned char * p, int pcontrol)
1987 { /* SAS SSP shared protocol specific port mode subpage */
1988 unsigned char sas_sha_m_pg[] = {0x59, 0x2, 0, 0xc, 0, 0x6, 0x10, 0,
1989 0, 0, 0, 0, 0, 0, 0, 0,
1990 };
1991
1992 memcpy(p, sas_sha_m_pg, sizeof(sas_sha_m_pg));
1993 if (1 == pcontrol)
1994 memset(p + 4, 0, sizeof(sas_sha_m_pg) - 4);
1995 return sizeof(sas_sha_m_pg);
1996 }
1997
1998 #define SDEBUG_MAX_MSENSE_SZ 256
1999
2000 static int
2001 resp_mode_sense(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
2002 {
2003 unsigned char dbd, llbaa;
2004 int pcontrol, pcode, subpcode, bd_len;
2005 unsigned char dev_spec;
2006 int k, alloc_len, msense_6, offset, len, target_dev_id;
2007 int target = scp->device->id;
2008 unsigned char * ap;
2009 unsigned char arr[SDEBUG_MAX_MSENSE_SZ];
2010 unsigned char *cmd = scp->cmnd;
2011
2012 dbd = !!(cmd[1] & 0x8);
2013 pcontrol = (cmd[2] & 0xc0) >> 6;
2014 pcode = cmd[2] & 0x3f;
2015 subpcode = cmd[3];
2016 msense_6 = (MODE_SENSE == cmd[0]);
2017 llbaa = msense_6 ? 0 : !!(cmd[1] & 0x10);
2018 if ((0 == scsi_debug_ptype) && (0 == dbd))
2019 bd_len = llbaa ? 16 : 8;
2020 else
2021 bd_len = 0;
2022 alloc_len = msense_6 ? cmd[4] : ((cmd[7] << 8) | cmd[8]);
2023 memset(arr, 0, SDEBUG_MAX_MSENSE_SZ);
2024 if (0x3 == pcontrol) { /* Saving values not supported */
2025 mk_sense_buffer(scp, ILLEGAL_REQUEST, SAVING_PARAMS_UNSUP, 0);
2026 return check_condition_result;
2027 }
2028 target_dev_id = ((devip->sdbg_host->shost->host_no + 1) * 2000) +
2029 (devip->target * 1000) - 3;
2030 /* set DPOFUA bit for disks */
2031 if (0 == scsi_debug_ptype)
2032 dev_spec = (DEV_READONLY(target) ? 0x80 : 0x0) | 0x10;
2033 else
2034 dev_spec = 0x0;
2035 if (msense_6) {
2036 arr[2] = dev_spec;
2037 arr[3] = bd_len;
2038 offset = 4;
2039 } else {
2040 arr[3] = dev_spec;
2041 if (16 == bd_len)
2042 arr[4] = 0x1; /* set LONGLBA bit */
2043 arr[7] = bd_len; /* assume 255 or less */
2044 offset = 8;
2045 }
2046 ap = arr + offset;
2047 if ((bd_len > 0) && (!sdebug_capacity))
2048 sdebug_capacity = get_sdebug_capacity();
2049
2050 if (8 == bd_len) {
2051 if (sdebug_capacity > 0xfffffffe) {
2052 ap[0] = 0xff;
2053 ap[1] = 0xff;
2054 ap[2] = 0xff;
2055 ap[3] = 0xff;
2056 } else {
2057 ap[0] = (sdebug_capacity >> 24) & 0xff;
2058 ap[1] = (sdebug_capacity >> 16) & 0xff;
2059 ap[2] = (sdebug_capacity >> 8) & 0xff;
2060 ap[3] = sdebug_capacity & 0xff;
2061 }
2062 ap[6] = (scsi_debug_sector_size >> 8) & 0xff;
2063 ap[7] = scsi_debug_sector_size & 0xff;
2064 offset += bd_len;
2065 ap = arr + offset;
2066 } else if (16 == bd_len) {
2067 unsigned long long capac = sdebug_capacity;
2068
2069 for (k = 0; k < 8; ++k, capac >>= 8)
2070 ap[7 - k] = capac & 0xff;
2071 ap[12] = (scsi_debug_sector_size >> 24) & 0xff;
2072 ap[13] = (scsi_debug_sector_size >> 16) & 0xff;
2073 ap[14] = (scsi_debug_sector_size >> 8) & 0xff;
2074 ap[15] = scsi_debug_sector_size & 0xff;
2075 offset += bd_len;
2076 ap = arr + offset;
2077 }
2078
2079 if ((subpcode > 0x0) && (subpcode < 0xff) && (0x19 != pcode)) {
2080 /* TODO: Control Extension page */
2081 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1);
2082 return check_condition_result;
2083 }
2084 switch (pcode) {
2085 case 0x1: /* Read-Write error recovery page, direct access */
2086 len = resp_err_recov_pg(ap, pcontrol, target);
2087 offset += len;
2088 break;
2089 case 0x2: /* Disconnect-Reconnect page, all devices */
2090 len = resp_disconnect_pg(ap, pcontrol, target);
2091 offset += len;
2092 break;
2093 case 0x3: /* Format device page, direct access */
2094 len = resp_format_pg(ap, pcontrol, target);
2095 offset += len;
2096 break;
2097 case 0x8: /* Caching page, direct access */
2098 len = resp_caching_pg(ap, pcontrol, target);
2099 offset += len;
2100 break;
2101 case 0xa: /* Control Mode page, all devices */
2102 len = resp_ctrl_m_pg(ap, pcontrol, target);
2103 offset += len;
2104 break;
2105 case 0x19: /* if spc==1 then sas phy, control+discover */
2106 if ((subpcode > 0x2) && (subpcode < 0xff)) {
2107 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1);
2108 return check_condition_result;
2109 }
2110 len = 0;
2111 if ((0x0 == subpcode) || (0xff == subpcode))
2112 len += resp_sas_sf_m_pg(ap + len, pcontrol, target);
2113 if ((0x1 == subpcode) || (0xff == subpcode))
2114 len += resp_sas_pcd_m_spg(ap + len, pcontrol, target,
2115 target_dev_id);
2116 if ((0x2 == subpcode) || (0xff == subpcode))
2117 len += resp_sas_sha_m_spg(ap + len, pcontrol);
2118 offset += len;
2119 break;
2120 case 0x1c: /* Informational Exceptions Mode page, all devices */
2121 len = resp_iec_m_pg(ap, pcontrol, target);
2122 offset += len;
2123 break;
2124 case 0x3f: /* Read all Mode pages */
2125 if ((0 == subpcode) || (0xff == subpcode)) {
2126 len = resp_err_recov_pg(ap, pcontrol, target);
2127 len += resp_disconnect_pg(ap + len, pcontrol, target);
2128 len += resp_format_pg(ap + len, pcontrol, target);
2129 len += resp_caching_pg(ap + len, pcontrol, target);
2130 len += resp_ctrl_m_pg(ap + len, pcontrol, target);
2131 len += resp_sas_sf_m_pg(ap + len, pcontrol, target);
2132 if (0xff == subpcode) {
2133 len += resp_sas_pcd_m_spg(ap + len, pcontrol,
2134 target, target_dev_id);
2135 len += resp_sas_sha_m_spg(ap + len, pcontrol);
2136 }
2137 len += resp_iec_m_pg(ap + len, pcontrol, target);
2138 } else {
2139 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1);
2140 return check_condition_result;
2141 }
2142 offset += len;
2143 break;
2144 default:
2145 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 5);
2146 return check_condition_result;
2147 }
2148 if (msense_6)
2149 arr[0] = offset - 1;
2150 else {
2151 arr[0] = ((offset - 2) >> 8) & 0xff;
2152 arr[1] = (offset - 2) & 0xff;
2153 }
2154 return fill_from_dev_buffer(scp, arr, min(alloc_len, offset));
2155 }
2156
2157 #define SDEBUG_MAX_MSELECT_SZ 512
2158
2159 static int
2160 resp_mode_select(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
2161 {
2162 int pf, sp, ps, md_len, bd_len, off, spf, pg_len;
2163 int param_len, res, mpage;
2164 unsigned char arr[SDEBUG_MAX_MSELECT_SZ];
2165 unsigned char *cmd = scp->cmnd;
2166 int mselect6 = (MODE_SELECT == cmd[0]);
2167
2168 memset(arr, 0, sizeof(arr));
2169 pf = cmd[1] & 0x10;
2170 sp = cmd[1] & 0x1;
2171 param_len = mselect6 ? cmd[4] : ((cmd[7] << 8) + cmd[8]);
2172 if ((0 == pf) || sp || (param_len > SDEBUG_MAX_MSELECT_SZ)) {
2173 mk_sense_invalid_fld(scp, SDEB_IN_CDB, mselect6 ? 4 : 7, -1);
2174 return check_condition_result;
2175 }
2176 res = fetch_to_dev_buffer(scp, arr, param_len);
2177 if (-1 == res)
2178 return (DID_ERROR << 16);
2179 else if ((res < param_len) &&
2180 (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts))
2181 sdev_printk(KERN_INFO, scp->device,
2182 "%s: cdb indicated=%d, IO sent=%d bytes\n",
2183 __func__, param_len, res);
2184 md_len = mselect6 ? (arr[0] + 1) : ((arr[0] << 8) + arr[1] + 2);
2185 bd_len = mselect6 ? arr[3] : ((arr[6] << 8) + arr[7]);
2186 if (md_len > 2) {
2187 mk_sense_invalid_fld(scp, SDEB_IN_DATA, 0, -1);
2188 return check_condition_result;
2189 }
2190 off = bd_len + (mselect6 ? 4 : 8);
2191 mpage = arr[off] & 0x3f;
2192 ps = !!(arr[off] & 0x80);
2193 if (ps) {
2194 mk_sense_invalid_fld(scp, SDEB_IN_DATA, off, 7);
2195 return check_condition_result;
2196 }
2197 spf = !!(arr[off] & 0x40);
2198 pg_len = spf ? ((arr[off + 2] << 8) + arr[off + 3] + 4) :
2199 (arr[off + 1] + 2);
2200 if ((pg_len + off) > param_len) {
2201 mk_sense_buffer(scp, ILLEGAL_REQUEST,
2202 PARAMETER_LIST_LENGTH_ERR, 0);
2203 return check_condition_result;
2204 }
2205 switch (mpage) {
2206 case 0x8: /* Caching Mode page */
2207 if (caching_pg[1] == arr[off + 1]) {
2208 memcpy(caching_pg + 2, arr + off + 2,
2209 sizeof(caching_pg) - 2);
2210 goto set_mode_changed_ua;
2211 }
2212 break;
2213 case 0xa: /* Control Mode page */
2214 if (ctrl_m_pg[1] == arr[off + 1]) {
2215 memcpy(ctrl_m_pg + 2, arr + off + 2,
2216 sizeof(ctrl_m_pg) - 2);
2217 scsi_debug_dsense = !!(ctrl_m_pg[2] & 0x4);
2218 goto set_mode_changed_ua;
2219 }
2220 break;
2221 case 0x1c: /* Informational Exceptions Mode page */
2222 if (iec_m_pg[1] == arr[off + 1]) {
2223 memcpy(iec_m_pg + 2, arr + off + 2,
2224 sizeof(iec_m_pg) - 2);
2225 goto set_mode_changed_ua;
2226 }
2227 break;
2228 default:
2229 break;
2230 }
2231 mk_sense_invalid_fld(scp, SDEB_IN_DATA, off, 5);
2232 return check_condition_result;
2233 set_mode_changed_ua:
2234 set_bit(SDEBUG_UA_MODE_CHANGED, devip->uas_bm);
2235 return 0;
2236 }
2237
2238 static int resp_temp_l_pg(unsigned char * arr)
2239 {
2240 unsigned char temp_l_pg[] = {0x0, 0x0, 0x3, 0x2, 0x0, 38,
2241 0x0, 0x1, 0x3, 0x2, 0x0, 65,
2242 };
2243
2244 memcpy(arr, temp_l_pg, sizeof(temp_l_pg));
2245 return sizeof(temp_l_pg);
2246 }
2247
2248 static int resp_ie_l_pg(unsigned char * arr)
2249 {
2250 unsigned char ie_l_pg[] = {0x0, 0x0, 0x3, 0x3, 0x0, 0x0, 38,
2251 };
2252
2253 memcpy(arr, ie_l_pg, sizeof(ie_l_pg));
2254 if (iec_m_pg[2] & 0x4) { /* TEST bit set */
2255 arr[4] = THRESHOLD_EXCEEDED;
2256 arr[5] = 0xff;
2257 }
2258 return sizeof(ie_l_pg);
2259 }
2260
2261 #define SDEBUG_MAX_LSENSE_SZ 512
2262
2263 static int resp_log_sense(struct scsi_cmnd * scp,
2264 struct sdebug_dev_info * devip)
2265 {
2266 int ppc, sp, pcontrol, pcode, subpcode, alloc_len, len, n;
2267 unsigned char arr[SDEBUG_MAX_LSENSE_SZ];
2268 unsigned char *cmd = scp->cmnd;
2269
2270 memset(arr, 0, sizeof(arr));
2271 ppc = cmd[1] & 0x2;
2272 sp = cmd[1] & 0x1;
2273 if (ppc || sp) {
2274 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, ppc ? 1 : 0);
2275 return check_condition_result;
2276 }
2277 pcontrol = (cmd[2] & 0xc0) >> 6;
2278 pcode = cmd[2] & 0x3f;
2279 subpcode = cmd[3] & 0xff;
2280 alloc_len = (cmd[7] << 8) + cmd[8];
2281 arr[0] = pcode;
2282 if (0 == subpcode) {
2283 switch (pcode) {
2284 case 0x0: /* Supported log pages log page */
2285 n = 4;
2286 arr[n++] = 0x0; /* this page */
2287 arr[n++] = 0xd; /* Temperature */
2288 arr[n++] = 0x2f; /* Informational exceptions */
2289 arr[3] = n - 4;
2290 break;
2291 case 0xd: /* Temperature log page */
2292 arr[3] = resp_temp_l_pg(arr + 4);
2293 break;
2294 case 0x2f: /* Informational exceptions log page */
2295 arr[3] = resp_ie_l_pg(arr + 4);
2296 break;
2297 default:
2298 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 5);
2299 return check_condition_result;
2300 }
2301 } else if (0xff == subpcode) {
2302 arr[0] |= 0x40;
2303 arr[1] = subpcode;
2304 switch (pcode) {
2305 case 0x0: /* Supported log pages and subpages log page */
2306 n = 4;
2307 arr[n++] = 0x0;
2308 arr[n++] = 0x0; /* 0,0 page */
2309 arr[n++] = 0x0;
2310 arr[n++] = 0xff; /* this page */
2311 arr[n++] = 0xd;
2312 arr[n++] = 0x0; /* Temperature */
2313 arr[n++] = 0x2f;
2314 arr[n++] = 0x0; /* Informational exceptions */
2315 arr[3] = n - 4;
2316 break;
2317 case 0xd: /* Temperature subpages */
2318 n = 4;
2319 arr[n++] = 0xd;
2320 arr[n++] = 0x0; /* Temperature */
2321 arr[3] = n - 4;
2322 break;
2323 case 0x2f: /* Informational exceptions subpages */
2324 n = 4;
2325 arr[n++] = 0x2f;
2326 arr[n++] = 0x0; /* Informational exceptions */
2327 arr[3] = n - 4;
2328 break;
2329 default:
2330 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 5);
2331 return check_condition_result;
2332 }
2333 } else {
2334 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1);
2335 return check_condition_result;
2336 }
2337 len = min(((arr[2] << 8) + arr[3]) + 4, alloc_len);
2338 return fill_from_dev_buffer(scp, arr,
2339 min(len, SDEBUG_MAX_INQ_ARR_SZ));
2340 }
2341
2342 static int check_device_access_params(struct scsi_cmnd *scp,
2343 unsigned long long lba, unsigned int num)
2344 {
2345 if (lba + num > sdebug_capacity) {
2346 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
2347 return check_condition_result;
2348 }
2349 /* transfer length excessive (tie in to block limits VPD page) */
2350 if (num > sdebug_store_sectors) {
2351 /* needs work to find which cdb byte 'num' comes from */
2352 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
2353 return check_condition_result;
2354 }
2355 return 0;
2356 }
2357
2358 /* Returns number of bytes copied or -1 if error. */
2359 static int
2360 do_device_access(struct scsi_cmnd *scmd, u64 lba, u32 num, bool do_write)
2361 {
2362 int ret;
2363 u64 block, rest = 0;
2364 struct scsi_data_buffer *sdb;
2365 enum dma_data_direction dir;
2366
2367 if (do_write) {
2368 sdb = scsi_out(scmd);
2369 dir = DMA_TO_DEVICE;
2370 } else {
2371 sdb = scsi_in(scmd);
2372 dir = DMA_FROM_DEVICE;
2373 }
2374
2375 if (!sdb->length)
2376 return 0;
2377 if (!(scsi_bidi_cmnd(scmd) || scmd->sc_data_direction == dir))
2378 return -1;
2379
2380 block = do_div(lba, sdebug_store_sectors);
2381 if (block + num > sdebug_store_sectors)
2382 rest = block + num - sdebug_store_sectors;
2383
2384 ret = sg_copy_buffer(sdb->table.sgl, sdb->table.nents,
2385 fake_storep + (block * scsi_debug_sector_size),
2386 (num - rest) * scsi_debug_sector_size, 0, do_write);
2387 if (ret != (num - rest) * scsi_debug_sector_size)
2388 return ret;
2389
2390 if (rest) {
2391 ret += sg_copy_buffer(sdb->table.sgl, sdb->table.nents,
2392 fake_storep, rest * scsi_debug_sector_size,
2393 (num - rest) * scsi_debug_sector_size, do_write);
2394 }
2395
2396 return ret;
2397 }
2398
2399 /* If fake_store(lba,num) compares equal to arr(num), then copy top half of
2400 * arr into fake_store(lba,num) and return true. If comparison fails then
2401 * return false. */
2402 static bool
2403 comp_write_worker(u64 lba, u32 num, const u8 *arr)
2404 {
2405 bool res;
2406 u64 block, rest = 0;
2407 u32 store_blks = sdebug_store_sectors;
2408 u32 lb_size = scsi_debug_sector_size;
2409
2410 block = do_div(lba, store_blks);
2411 if (block + num > store_blks)
2412 rest = block + num - store_blks;
2413
2414 res = !memcmp(fake_storep + (block * lb_size), arr,
2415 (num - rest) * lb_size);
2416 if (!res)
2417 return res;
2418 if (rest)
2419 res = memcmp(fake_storep, arr + ((num - rest) * lb_size),
2420 rest * lb_size);
2421 if (!res)
2422 return res;
2423 arr += num * lb_size;
2424 memcpy(fake_storep + (block * lb_size), arr, (num - rest) * lb_size);
2425 if (rest)
2426 memcpy(fake_storep, arr + ((num - rest) * lb_size),
2427 rest * lb_size);
2428 return res;
2429 }
2430
2431 static __be16 dif_compute_csum(const void *buf, int len)
2432 {
2433 __be16 csum;
2434
2435 if (scsi_debug_guard)
2436 csum = (__force __be16)ip_compute_csum(buf, len);
2437 else
2438 csum = cpu_to_be16(crc_t10dif(buf, len));
2439
2440 return csum;
2441 }
2442
2443 static int dif_verify(struct sd_dif_tuple *sdt, const void *data,
2444 sector_t sector, u32 ei_lba)
2445 {
2446 __be16 csum = dif_compute_csum(data, scsi_debug_sector_size);
2447
2448 if (sdt->guard_tag != csum) {
2449 pr_err("%s: GUARD check failed on sector %lu rcvd 0x%04x, data 0x%04x\n",
2450 __func__,
2451 (unsigned long)sector,
2452 be16_to_cpu(sdt->guard_tag),
2453 be16_to_cpu(csum));
2454 return 0x01;
2455 }
2456 if (scsi_debug_dif == SD_DIF_TYPE1_PROTECTION &&
2457 be32_to_cpu(sdt->ref_tag) != (sector & 0xffffffff)) {
2458 pr_err("%s: REF check failed on sector %lu\n",
2459 __func__, (unsigned long)sector);
2460 return 0x03;
2461 }
2462 if (scsi_debug_dif == SD_DIF_TYPE2_PROTECTION &&
2463 be32_to_cpu(sdt->ref_tag) != ei_lba) {
2464 pr_err("%s: REF check failed on sector %lu\n",
2465 __func__, (unsigned long)sector);
2466 return 0x03;
2467 }
2468 return 0;
2469 }
2470
2471 static void dif_copy_prot(struct scsi_cmnd *SCpnt, sector_t sector,
2472 unsigned int sectors, bool read)
2473 {
2474 size_t resid;
2475 void *paddr;
2476 const void *dif_store_end = dif_storep + sdebug_store_sectors;
2477 struct sg_mapping_iter miter;
2478
2479 /* Bytes of protection data to copy into sgl */
2480 resid = sectors * sizeof(*dif_storep);
2481
2482 sg_miter_start(&miter, scsi_prot_sglist(SCpnt),
2483 scsi_prot_sg_count(SCpnt), SG_MITER_ATOMIC |
2484 (read ? SG_MITER_TO_SG : SG_MITER_FROM_SG));
2485
2486 while (sg_miter_next(&miter) && resid > 0) {
2487 size_t len = min(miter.length, resid);
2488 void *start = dif_store(sector);
2489 size_t rest = 0;
2490
2491 if (dif_store_end < start + len)
2492 rest = start + len - dif_store_end;
2493
2494 paddr = miter.addr;
2495
2496 if (read)
2497 memcpy(paddr, start, len - rest);
2498 else
2499 memcpy(start, paddr, len - rest);
2500
2501 if (rest) {
2502 if (read)
2503 memcpy(paddr + len - rest, dif_storep, rest);
2504 else
2505 memcpy(dif_storep, paddr + len - rest, rest);
2506 }
2507
2508 sector += len / sizeof(*dif_storep);
2509 resid -= len;
2510 }
2511 sg_miter_stop(&miter);
2512 }
2513
2514 static int prot_verify_read(struct scsi_cmnd *SCpnt, sector_t start_sec,
2515 unsigned int sectors, u32 ei_lba)
2516 {
2517 unsigned int i;
2518 struct sd_dif_tuple *sdt;
2519 sector_t sector;
2520
2521 for (i = 0; i < sectors; i++, ei_lba++) {
2522 int ret;
2523
2524 sector = start_sec + i;
2525 sdt = dif_store(sector);
2526
2527 if (sdt->app_tag == cpu_to_be16(0xffff))
2528 continue;
2529
2530 ret = dif_verify(sdt, fake_store(sector), sector, ei_lba);
2531 if (ret) {
2532 dif_errors++;
2533 return ret;
2534 }
2535 }
2536
2537 dif_copy_prot(SCpnt, start_sec, sectors, true);
2538 dix_reads++;
2539
2540 return 0;
2541 }
2542
2543 static int
2544 resp_read_dt0(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
2545 {
2546 u8 *cmd = scp->cmnd;
2547 u64 lba;
2548 u32 num;
2549 u32 ei_lba;
2550 unsigned long iflags;
2551 int ret;
2552 bool check_prot;
2553
2554 switch (cmd[0]) {
2555 case READ_16:
2556 ei_lba = 0;
2557 lba = get_unaligned_be64(cmd + 2);
2558 num = get_unaligned_be32(cmd + 10);
2559 check_prot = true;
2560 break;
2561 case READ_10:
2562 ei_lba = 0;
2563 lba = get_unaligned_be32(cmd + 2);
2564 num = get_unaligned_be16(cmd + 7);
2565 check_prot = true;
2566 break;
2567 case READ_6:
2568 ei_lba = 0;
2569 lba = (u32)cmd[3] | (u32)cmd[2] << 8 |
2570 (u32)(cmd[1] & 0x1f) << 16;
2571 num = (0 == cmd[4]) ? 256 : cmd[4];
2572 check_prot = true;
2573 break;
2574 case READ_12:
2575 ei_lba = 0;
2576 lba = get_unaligned_be32(cmd + 2);
2577 num = get_unaligned_be32(cmd + 6);
2578 check_prot = true;
2579 break;
2580 case XDWRITEREAD_10:
2581 ei_lba = 0;
2582 lba = get_unaligned_be32(cmd + 2);
2583 num = get_unaligned_be16(cmd + 7);
2584 check_prot = false;
2585 break;
2586 default: /* assume READ(32) */
2587 lba = get_unaligned_be64(cmd + 12);
2588 ei_lba = get_unaligned_be32(cmd + 20);
2589 num = get_unaligned_be32(cmd + 28);
2590 check_prot = false;
2591 break;
2592 }
2593 if (check_prot) {
2594 if (scsi_debug_dif == SD_DIF_TYPE2_PROTECTION &&
2595 (cmd[1] & 0xe0)) {
2596 mk_sense_invalid_opcode(scp);
2597 return check_condition_result;
2598 }
2599 if ((scsi_debug_dif == SD_DIF_TYPE1_PROTECTION ||
2600 scsi_debug_dif == SD_DIF_TYPE3_PROTECTION) &&
2601 (cmd[1] & 0xe0) == 0)
2602 sdev_printk(KERN_ERR, scp->device, "Unprotected RD "
2603 "to DIF device\n");
2604 }
2605 if (sdebug_any_injecting_opt) {
2606 struct sdebug_scmd_extra_t *ep = scsi_cmd_priv(scp);
2607
2608 if (ep->inj_short)
2609 num /= 2;
2610 }
2611
2612 /* inline check_device_access_params() */
2613 if (lba + num > sdebug_capacity) {
2614 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
2615 return check_condition_result;
2616 }
2617 /* transfer length excessive (tie in to block limits VPD page) */
2618 if (num > sdebug_store_sectors) {
2619 /* needs work to find which cdb byte 'num' comes from */
2620 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
2621 return check_condition_result;
2622 }
2623
2624 if ((SCSI_DEBUG_OPT_MEDIUM_ERR & scsi_debug_opts) &&
2625 (lba <= (OPT_MEDIUM_ERR_ADDR + OPT_MEDIUM_ERR_NUM - 1)) &&
2626 ((lba + num) > OPT_MEDIUM_ERR_ADDR)) {
2627 /* claim unrecoverable read error */
2628 mk_sense_buffer(scp, MEDIUM_ERROR, UNRECOVERED_READ_ERR, 0);
2629 /* set info field and valid bit for fixed descriptor */
2630 if (0x70 == (scp->sense_buffer[0] & 0x7f)) {
2631 scp->sense_buffer[0] |= 0x80; /* Valid bit */
2632 ret = (lba < OPT_MEDIUM_ERR_ADDR)
2633 ? OPT_MEDIUM_ERR_ADDR : (int)lba;
2634 put_unaligned_be32(ret, scp->sense_buffer + 3);
2635 }
2636 scsi_set_resid(scp, scsi_bufflen(scp));
2637 return check_condition_result;
2638 }
2639
2640 read_lock_irqsave(&atomic_rw, iflags);
2641
2642 /* DIX + T10 DIF */
2643 if (scsi_debug_dix && scsi_prot_sg_count(scp)) {
2644 int prot_ret = prot_verify_read(scp, lba, num, ei_lba);
2645
2646 if (prot_ret) {
2647 read_unlock_irqrestore(&atomic_rw, iflags);
2648 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, prot_ret);
2649 return illegal_condition_result;
2650 }
2651 }
2652
2653 ret = do_device_access(scp, lba, num, false);
2654 read_unlock_irqrestore(&atomic_rw, iflags);
2655 if (ret == -1)
2656 return DID_ERROR << 16;
2657
2658 scsi_in(scp)->resid = scsi_bufflen(scp) - ret;
2659
2660 if (sdebug_any_injecting_opt) {
2661 struct sdebug_scmd_extra_t *ep = scsi_cmd_priv(scp);
2662
2663 if (ep->inj_recovered) {
2664 mk_sense_buffer(scp, RECOVERED_ERROR,
2665 THRESHOLD_EXCEEDED, 0);
2666 return check_condition_result;
2667 } else if (ep->inj_transport) {
2668 mk_sense_buffer(scp, ABORTED_COMMAND,
2669 TRANSPORT_PROBLEM, ACK_NAK_TO);
2670 return check_condition_result;
2671 } else if (ep->inj_dif) {
2672 /* Logical block guard check failed */
2673 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 1);
2674 return illegal_condition_result;
2675 } else if (ep->inj_dix) {
2676 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 1);
2677 return illegal_condition_result;
2678 }
2679 }
2680 return 0;
2681 }
2682
2683 void dump_sector(unsigned char *buf, int len)
2684 {
2685 int i, j, n;
2686
2687 pr_err(">>> Sector Dump <<<\n");
2688 for (i = 0 ; i < len ; i += 16) {
2689 char b[128];
2690
2691 for (j = 0, n = 0; j < 16; j++) {
2692 unsigned char c = buf[i+j];
2693
2694 if (c >= 0x20 && c < 0x7e)
2695 n += scnprintf(b + n, sizeof(b) - n,
2696 " %c ", buf[i+j]);
2697 else
2698 n += scnprintf(b + n, sizeof(b) - n,
2699 "%02x ", buf[i+j]);
2700 }
2701 pr_err("%04d: %s\n", i, b);
2702 }
2703 }
2704
2705 static int prot_verify_write(struct scsi_cmnd *SCpnt, sector_t start_sec,
2706 unsigned int sectors, u32 ei_lba)
2707 {
2708 int ret;
2709 struct sd_dif_tuple *sdt;
2710 void *daddr;
2711 sector_t sector = start_sec;
2712 int ppage_offset;
2713 int dpage_offset;
2714 struct sg_mapping_iter diter;
2715 struct sg_mapping_iter piter;
2716
2717 BUG_ON(scsi_sg_count(SCpnt) == 0);
2718 BUG_ON(scsi_prot_sg_count(SCpnt) == 0);
2719
2720 sg_miter_start(&piter, scsi_prot_sglist(SCpnt),
2721 scsi_prot_sg_count(SCpnt),
2722 SG_MITER_ATOMIC | SG_MITER_FROM_SG);
2723 sg_miter_start(&diter, scsi_sglist(SCpnt), scsi_sg_count(SCpnt),
2724 SG_MITER_ATOMIC | SG_MITER_FROM_SG);
2725
2726 /* For each protection page */
2727 while (sg_miter_next(&piter)) {
2728 dpage_offset = 0;
2729 if (WARN_ON(!sg_miter_next(&diter))) {
2730 ret = 0x01;
2731 goto out;
2732 }
2733
2734 for (ppage_offset = 0; ppage_offset < piter.length;
2735 ppage_offset += sizeof(struct sd_dif_tuple)) {
2736 /* If we're at the end of the current
2737 * data page advance to the next one
2738 */
2739 if (dpage_offset >= diter.length) {
2740 if (WARN_ON(!sg_miter_next(&diter))) {
2741 ret = 0x01;
2742 goto out;
2743 }
2744 dpage_offset = 0;
2745 }
2746
2747 sdt = piter.addr + ppage_offset;
2748 daddr = diter.addr + dpage_offset;
2749
2750 ret = dif_verify(sdt, daddr, sector, ei_lba);
2751 if (ret) {
2752 dump_sector(daddr, scsi_debug_sector_size);
2753 goto out;
2754 }
2755
2756 sector++;
2757 ei_lba++;
2758 dpage_offset += scsi_debug_sector_size;
2759 }
2760 diter.consumed = dpage_offset;
2761 sg_miter_stop(&diter);
2762 }
2763 sg_miter_stop(&piter);
2764
2765 dif_copy_prot(SCpnt, start_sec, sectors, false);
2766 dix_writes++;
2767
2768 return 0;
2769
2770 out:
2771 dif_errors++;
2772 sg_miter_stop(&diter);
2773 sg_miter_stop(&piter);
2774 return ret;
2775 }
2776
2777 static unsigned long lba_to_map_index(sector_t lba)
2778 {
2779 if (scsi_debug_unmap_alignment) {
2780 lba += scsi_debug_unmap_granularity -
2781 scsi_debug_unmap_alignment;
2782 }
2783 do_div(lba, scsi_debug_unmap_granularity);
2784
2785 return lba;
2786 }
2787
2788 static sector_t map_index_to_lba(unsigned long index)
2789 {
2790 sector_t lba = index * scsi_debug_unmap_granularity;
2791
2792 if (scsi_debug_unmap_alignment) {
2793 lba -= scsi_debug_unmap_granularity -
2794 scsi_debug_unmap_alignment;
2795 }
2796
2797 return lba;
2798 }
2799
2800 static unsigned int map_state(sector_t lba, unsigned int *num)
2801 {
2802 sector_t end;
2803 unsigned int mapped;
2804 unsigned long index;
2805 unsigned long next;
2806
2807 index = lba_to_map_index(lba);
2808 mapped = test_bit(index, map_storep);
2809
2810 if (mapped)
2811 next = find_next_zero_bit(map_storep, map_size, index);
2812 else
2813 next = find_next_bit(map_storep, map_size, index);
2814
2815 end = min_t(sector_t, sdebug_store_sectors, map_index_to_lba(next));
2816 *num = end - lba;
2817
2818 return mapped;
2819 }
2820
2821 static void map_region(sector_t lba, unsigned int len)
2822 {
2823 sector_t end = lba + len;
2824
2825 while (lba < end) {
2826 unsigned long index = lba_to_map_index(lba);
2827
2828 if (index < map_size)
2829 set_bit(index, map_storep);
2830
2831 lba = map_index_to_lba(index + 1);
2832 }
2833 }
2834
2835 static void unmap_region(sector_t lba, unsigned int len)
2836 {
2837 sector_t end = lba + len;
2838
2839 while (lba < end) {
2840 unsigned long index = lba_to_map_index(lba);
2841
2842 if (lba == map_index_to_lba(index) &&
2843 lba + scsi_debug_unmap_granularity <= end &&
2844 index < map_size) {
2845 clear_bit(index, map_storep);
2846 if (scsi_debug_lbprz) {
2847 memset(fake_storep +
2848 lba * scsi_debug_sector_size, 0,
2849 scsi_debug_sector_size *
2850 scsi_debug_unmap_granularity);
2851 }
2852 if (dif_storep) {
2853 memset(dif_storep + lba, 0xff,
2854 sizeof(*dif_storep) *
2855 scsi_debug_unmap_granularity);
2856 }
2857 }
2858 lba = map_index_to_lba(index + 1);
2859 }
2860 }
2861
2862 static int
2863 resp_write_dt0(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
2864 {
2865 u8 *cmd = scp->cmnd;
2866 u64 lba;
2867 u32 num;
2868 u32 ei_lba;
2869 unsigned long iflags;
2870 int ret;
2871 bool check_prot;
2872
2873 switch (cmd[0]) {
2874 case WRITE_16:
2875 ei_lba = 0;
2876 lba = get_unaligned_be64(cmd + 2);
2877 num = get_unaligned_be32(cmd + 10);
2878 check_prot = true;
2879 break;
2880 case WRITE_10:
2881 ei_lba = 0;
2882 lba = get_unaligned_be32(cmd + 2);
2883 num = get_unaligned_be16(cmd + 7);
2884 check_prot = true;
2885 break;
2886 case WRITE_6:
2887 ei_lba = 0;
2888 lba = (u32)cmd[3] | (u32)cmd[2] << 8 |
2889 (u32)(cmd[1] & 0x1f) << 16;
2890 num = (0 == cmd[4]) ? 256 : cmd[4];
2891 check_prot = true;
2892 break;
2893 case WRITE_12:
2894 ei_lba = 0;
2895 lba = get_unaligned_be32(cmd + 2);
2896 num = get_unaligned_be32(cmd + 6);
2897 check_prot = true;
2898 break;
2899 case 0x53: /* XDWRITEREAD(10) */
2900 ei_lba = 0;
2901 lba = get_unaligned_be32(cmd + 2);
2902 num = get_unaligned_be16(cmd + 7);
2903 check_prot = false;
2904 break;
2905 default: /* assume WRITE(32) */
2906 lba = get_unaligned_be64(cmd + 12);
2907 ei_lba = get_unaligned_be32(cmd + 20);
2908 num = get_unaligned_be32(cmd + 28);
2909 check_prot = false;
2910 break;
2911 }
2912 if (check_prot) {
2913 if (scsi_debug_dif == SD_DIF_TYPE2_PROTECTION &&
2914 (cmd[1] & 0xe0)) {
2915 mk_sense_invalid_opcode(scp);
2916 return check_condition_result;
2917 }
2918 if ((scsi_debug_dif == SD_DIF_TYPE1_PROTECTION ||
2919 scsi_debug_dif == SD_DIF_TYPE3_PROTECTION) &&
2920 (cmd[1] & 0xe0) == 0)
2921 sdev_printk(KERN_ERR, scp->device, "Unprotected WR "
2922 "to DIF device\n");
2923 }
2924
2925 /* inline check_device_access_params() */
2926 if (lba + num > sdebug_capacity) {
2927 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
2928 return check_condition_result;
2929 }
2930 /* transfer length excessive (tie in to block limits VPD page) */
2931 if (num > sdebug_store_sectors) {
2932 /* needs work to find which cdb byte 'num' comes from */
2933 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
2934 return check_condition_result;
2935 }
2936
2937 write_lock_irqsave(&atomic_rw, iflags);
2938
2939 /* DIX + T10 DIF */
2940 if (scsi_debug_dix && scsi_prot_sg_count(scp)) {
2941 int prot_ret = prot_verify_write(scp, lba, num, ei_lba);
2942
2943 if (prot_ret) {
2944 write_unlock_irqrestore(&atomic_rw, iflags);
2945 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, prot_ret);
2946 return illegal_condition_result;
2947 }
2948 }
2949
2950 ret = do_device_access(scp, lba, num, true);
2951 if (scsi_debug_lbp())
2952 map_region(lba, num);
2953 write_unlock_irqrestore(&atomic_rw, iflags);
2954 if (-1 == ret)
2955 return (DID_ERROR << 16);
2956 else if ((ret < (num * scsi_debug_sector_size)) &&
2957 (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts))
2958 sdev_printk(KERN_INFO, scp->device,
2959 "%s: write: cdb indicated=%u, IO sent=%d bytes\n",
2960 my_name, num * scsi_debug_sector_size, ret);
2961
2962 if (sdebug_any_injecting_opt) {
2963 struct sdebug_scmd_extra_t *ep = scsi_cmd_priv(scp);
2964
2965 if (ep->inj_recovered) {
2966 mk_sense_buffer(scp, RECOVERED_ERROR,
2967 THRESHOLD_EXCEEDED, 0);
2968 return check_condition_result;
2969 } else if (ep->inj_dif) {
2970 /* Logical block guard check failed */
2971 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 1);
2972 return illegal_condition_result;
2973 } else if (ep->inj_dix) {
2974 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 1);
2975 return illegal_condition_result;
2976 }
2977 }
2978 return 0;
2979 }
2980
2981 static int
2982 resp_write_same(struct scsi_cmnd *scp, u64 lba, u32 num, u32 ei_lba,
2983 bool unmap, bool ndob)
2984 {
2985 unsigned long iflags;
2986 unsigned long long i;
2987 int ret;
2988
2989 ret = check_device_access_params(scp, lba, num);
2990 if (ret)
2991 return ret;
2992
2993 write_lock_irqsave(&atomic_rw, iflags);
2994
2995 if (unmap && scsi_debug_lbp()) {
2996 unmap_region(lba, num);
2997 goto out;
2998 }
2999
3000 /* if ndob then zero 1 logical block, else fetch 1 logical block */
3001 if (ndob) {
3002 memset(fake_storep + (lba * scsi_debug_sector_size), 0,
3003 scsi_debug_sector_size);
3004 ret = 0;
3005 } else
3006 ret = fetch_to_dev_buffer(scp, fake_storep +
3007 (lba * scsi_debug_sector_size),
3008 scsi_debug_sector_size);
3009
3010 if (-1 == ret) {
3011 write_unlock_irqrestore(&atomic_rw, iflags);
3012 return (DID_ERROR << 16);
3013 } else if ((ret < (num * scsi_debug_sector_size)) &&
3014 (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts))
3015 sdev_printk(KERN_INFO, scp->device,
3016 "%s: %s: cdb indicated=%u, IO sent=%d bytes\n",
3017 my_name, "write same",
3018 num * scsi_debug_sector_size, ret);
3019
3020 /* Copy first sector to remaining blocks */
3021 for (i = 1 ; i < num ; i++)
3022 memcpy(fake_storep + ((lba + i) * scsi_debug_sector_size),
3023 fake_storep + (lba * scsi_debug_sector_size),
3024 scsi_debug_sector_size);
3025
3026 if (scsi_debug_lbp())
3027 map_region(lba, num);
3028 out:
3029 write_unlock_irqrestore(&atomic_rw, iflags);
3030
3031 return 0;
3032 }
3033
3034 static int
3035 resp_write_same_10(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
3036 {
3037 u8 *cmd = scp->cmnd;
3038 u32 lba;
3039 u16 num;
3040 u32 ei_lba = 0;
3041 bool unmap = false;
3042
3043 if (cmd[1] & 0x8) {
3044 if (scsi_debug_lbpws10 == 0) {
3045 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 3);
3046 return check_condition_result;
3047 } else
3048 unmap = true;
3049 }
3050 lba = get_unaligned_be32(cmd + 2);
3051 num = get_unaligned_be16(cmd + 7);
3052 if (num > scsi_debug_write_same_length) {
3053 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 7, -1);
3054 return check_condition_result;
3055 }
3056 return resp_write_same(scp, lba, num, ei_lba, unmap, false);
3057 }
3058
3059 static int
3060 resp_write_same_16(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
3061 {
3062 u8 *cmd = scp->cmnd;
3063 u64 lba;
3064 u32 num;
3065 u32 ei_lba = 0;
3066 bool unmap = false;
3067 bool ndob = false;
3068
3069 if (cmd[1] & 0x8) { /* UNMAP */
3070 if (scsi_debug_lbpws == 0) {
3071 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 3);
3072 return check_condition_result;
3073 } else
3074 unmap = true;
3075 }
3076 if (cmd[1] & 0x1) /* NDOB (no data-out buffer, assumes zeroes) */
3077 ndob = true;
3078 lba = get_unaligned_be64(cmd + 2);
3079 num = get_unaligned_be32(cmd + 10);
3080 if (num > scsi_debug_write_same_length) {
3081 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 10, -1);
3082 return check_condition_result;
3083 }
3084 return resp_write_same(scp, lba, num, ei_lba, unmap, ndob);
3085 }
3086
3087 /* Note the mode field is in the same position as the (lower) service action
3088 * field. For the Report supported operation codes command, SPC-4 suggests
3089 * each mode of this command should be reported separately; for future. */
3090 static int
3091 resp_write_buffer(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
3092 {
3093 u8 *cmd = scp->cmnd;
3094 struct scsi_device *sdp = scp->device;
3095 struct sdebug_dev_info *dp;
3096 u8 mode;
3097
3098 mode = cmd[1] & 0x1f;
3099 switch (mode) {
3100 case 0x4: /* download microcode (MC) and activate (ACT) */
3101 /* set UAs on this device only */
3102 set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm);
3103 set_bit(SDEBUG_UA_MICROCODE_CHANGED, devip->uas_bm);
3104 break;
3105 case 0x5: /* download MC, save and ACT */
3106 set_bit(SDEBUG_UA_MICROCODE_CHANGED_WO_RESET, devip->uas_bm);
3107 break;
3108 case 0x6: /* download MC with offsets and ACT */
3109 /* set UAs on most devices (LUs) in this target */
3110 list_for_each_entry(dp,
3111 &devip->sdbg_host->dev_info_list,
3112 dev_list)
3113 if (dp->target == sdp->id) {
3114 set_bit(SDEBUG_UA_BUS_RESET, dp->uas_bm);
3115 if (devip != dp)
3116 set_bit(SDEBUG_UA_MICROCODE_CHANGED,
3117 dp->uas_bm);
3118 }
3119 break;
3120 case 0x7: /* download MC with offsets, save, and ACT */
3121 /* set UA on all devices (LUs) in this target */
3122 list_for_each_entry(dp,
3123 &devip->sdbg_host->dev_info_list,
3124 dev_list)
3125 if (dp->target == sdp->id)
3126 set_bit(SDEBUG_UA_MICROCODE_CHANGED_WO_RESET,
3127 dp->uas_bm);
3128 break;
3129 default:
3130 /* do nothing for this command for other mode values */
3131 break;
3132 }
3133 return 0;
3134 }
3135
3136 static int
3137 resp_comp_write(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
3138 {
3139 u8 *cmd = scp->cmnd;
3140 u8 *arr;
3141 u8 *fake_storep_hold;
3142 u64 lba;
3143 u32 dnum;
3144 u32 lb_size = scsi_debug_sector_size;
3145 u8 num;
3146 unsigned long iflags;
3147 int ret;
3148 int retval = 0;
3149
3150 lba = get_unaligned_be64(cmd + 2);
3151 num = cmd[13]; /* 1 to a maximum of 255 logical blocks */
3152 if (0 == num)
3153 return 0; /* degenerate case, not an error */
3154 if (scsi_debug_dif == SD_DIF_TYPE2_PROTECTION &&
3155 (cmd[1] & 0xe0)) {
3156 mk_sense_invalid_opcode(scp);
3157 return check_condition_result;
3158 }
3159 if ((scsi_debug_dif == SD_DIF_TYPE1_PROTECTION ||
3160 scsi_debug_dif == SD_DIF_TYPE3_PROTECTION) &&
3161 (cmd[1] & 0xe0) == 0)
3162 sdev_printk(KERN_ERR, scp->device, "Unprotected WR "
3163 "to DIF device\n");
3164
3165 /* inline check_device_access_params() */
3166 if (lba + num > sdebug_capacity) {
3167 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
3168 return check_condition_result;
3169 }
3170 /* transfer length excessive (tie in to block limits VPD page) */
3171 if (num > sdebug_store_sectors) {
3172 /* needs work to find which cdb byte 'num' comes from */
3173 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
3174 return check_condition_result;
3175 }
3176 dnum = 2 * num;
3177 arr = kzalloc(dnum * lb_size, GFP_ATOMIC);
3178 if (NULL == arr) {
3179 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
3180 INSUFF_RES_ASCQ);
3181 return check_condition_result;
3182 }
3183
3184 write_lock_irqsave(&atomic_rw, iflags);
3185
3186 /* trick do_device_access() to fetch both compare and write buffers
3187 * from data-in into arr. Safe (atomic) since write_lock held. */
3188 fake_storep_hold = fake_storep;
3189 fake_storep = arr;
3190 ret = do_device_access(scp, 0, dnum, true);
3191 fake_storep = fake_storep_hold;
3192 if (ret == -1) {
3193 retval = DID_ERROR << 16;
3194 goto cleanup;
3195 } else if ((ret < (dnum * lb_size)) &&
3196 (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts))
3197 sdev_printk(KERN_INFO, scp->device, "%s: compare_write: cdb "
3198 "indicated=%u, IO sent=%d bytes\n", my_name,
3199 dnum * lb_size, ret);
3200 if (!comp_write_worker(lba, num, arr)) {
3201 mk_sense_buffer(scp, MISCOMPARE, MISCOMPARE_VERIFY_ASC, 0);
3202 retval = check_condition_result;
3203 goto cleanup;
3204 }
3205 if (scsi_debug_lbp())
3206 map_region(lba, num);
3207 cleanup:
3208 write_unlock_irqrestore(&atomic_rw, iflags);
3209 kfree(arr);
3210 return retval;
3211 }
3212
3213 struct unmap_block_desc {
3214 __be64 lba;
3215 __be32 blocks;
3216 __be32 __reserved;
3217 };
3218
3219 static int
3220 resp_unmap(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
3221 {
3222 unsigned char *buf;
3223 struct unmap_block_desc *desc;
3224 unsigned int i, payload_len, descriptors;
3225 int ret;
3226 unsigned long iflags;
3227
3228
3229 if (!scsi_debug_lbp())
3230 return 0; /* fib and say its done */
3231 payload_len = get_unaligned_be16(scp->cmnd + 7);
3232 BUG_ON(scsi_bufflen(scp) != payload_len);
3233
3234 descriptors = (payload_len - 8) / 16;
3235 if (descriptors > scsi_debug_unmap_max_desc) {
3236 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 7, -1);
3237 return check_condition_result;
3238 }
3239
3240 buf = kmalloc(scsi_bufflen(scp), GFP_ATOMIC);
3241 if (!buf) {
3242 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
3243 INSUFF_RES_ASCQ);
3244 return check_condition_result;
3245 }
3246
3247 scsi_sg_copy_to_buffer(scp, buf, scsi_bufflen(scp));
3248
3249 BUG_ON(get_unaligned_be16(&buf[0]) != payload_len - 2);
3250 BUG_ON(get_unaligned_be16(&buf[2]) != descriptors * 16);
3251
3252 desc = (void *)&buf[8];
3253
3254 write_lock_irqsave(&atomic_rw, iflags);
3255
3256 for (i = 0 ; i < descriptors ; i++) {
3257 unsigned long long lba = get_unaligned_be64(&desc[i].lba);
3258 unsigned int num = get_unaligned_be32(&desc[i].blocks);
3259
3260 ret = check_device_access_params(scp, lba, num);
3261 if (ret)
3262 goto out;
3263
3264 unmap_region(lba, num);
3265 }
3266
3267 ret = 0;
3268
3269 out:
3270 write_unlock_irqrestore(&atomic_rw, iflags);
3271 kfree(buf);
3272
3273 return ret;
3274 }
3275
3276 #define SDEBUG_GET_LBA_STATUS_LEN 32
3277
3278 static int
3279 resp_get_lba_status(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
3280 {
3281 u8 *cmd = scp->cmnd;
3282 u64 lba;
3283 u32 alloc_len, mapped, num;
3284 u8 arr[SDEBUG_GET_LBA_STATUS_LEN];
3285 int ret;
3286
3287 lba = get_unaligned_be64(cmd + 2);
3288 alloc_len = get_unaligned_be32(cmd + 10);
3289
3290 if (alloc_len < 24)
3291 return 0;
3292
3293 ret = check_device_access_params(scp, lba, 1);
3294 if (ret)
3295 return ret;
3296
3297 if (scsi_debug_lbp())
3298 mapped = map_state(lba, &num);
3299 else {
3300 mapped = 1;
3301 /* following just in case virtual_gb changed */
3302 sdebug_capacity = get_sdebug_capacity();
3303 if (sdebug_capacity - lba <= 0xffffffff)
3304 num = sdebug_capacity - lba;
3305 else
3306 num = 0xffffffff;
3307 }
3308
3309 memset(arr, 0, SDEBUG_GET_LBA_STATUS_LEN);
3310 put_unaligned_be32(20, arr); /* Parameter Data Length */
3311 put_unaligned_be64(lba, arr + 8); /* LBA */
3312 put_unaligned_be32(num, arr + 16); /* Number of blocks */
3313 arr[20] = !mapped; /* prov_stat=0: mapped; 1: dealloc */
3314
3315 return fill_from_dev_buffer(scp, arr, SDEBUG_GET_LBA_STATUS_LEN);
3316 }
3317
3318 #define SDEBUG_RLUN_ARR_SZ 256
3319
3320 static int resp_report_luns(struct scsi_cmnd * scp,
3321 struct sdebug_dev_info * devip)
3322 {
3323 unsigned int alloc_len;
3324 int lun_cnt, i, upper, num, n, want_wlun, shortish;
3325 u64 lun;
3326 unsigned char *cmd = scp->cmnd;
3327 int select_report = (int)cmd[2];
3328 struct scsi_lun *one_lun;
3329 unsigned char arr[SDEBUG_RLUN_ARR_SZ];
3330 unsigned char * max_addr;
3331
3332 clear_luns_changed_on_target(devip);
3333 alloc_len = cmd[9] + (cmd[8] << 8) + (cmd[7] << 16) + (cmd[6] << 24);
3334 shortish = (alloc_len < 4);
3335 if (shortish || (select_report > 2)) {
3336 mk_sense_invalid_fld(scp, SDEB_IN_CDB, shortish ? 6 : 2, -1);
3337 return check_condition_result;
3338 }
3339 /* can produce response with up to 16k luns (lun 0 to lun 16383) */
3340 memset(arr, 0, SDEBUG_RLUN_ARR_SZ);
3341 lun_cnt = scsi_debug_max_luns;
3342 if (1 == select_report)
3343 lun_cnt = 0;
3344 else if (scsi_debug_no_lun_0 && (lun_cnt > 0))
3345 --lun_cnt;
3346 want_wlun = (select_report > 0) ? 1 : 0;
3347 num = lun_cnt + want_wlun;
3348 arr[2] = ((sizeof(struct scsi_lun) * num) >> 8) & 0xff;
3349 arr[3] = (sizeof(struct scsi_lun) * num) & 0xff;
3350 n = min((int)((SDEBUG_RLUN_ARR_SZ - 8) /
3351 sizeof(struct scsi_lun)), num);
3352 if (n < num) {
3353 want_wlun = 0;
3354 lun_cnt = n;
3355 }
3356 one_lun = (struct scsi_lun *) &arr[8];
3357 max_addr = arr + SDEBUG_RLUN_ARR_SZ;
3358 for (i = 0, lun = (scsi_debug_no_lun_0 ? 1 : 0);
3359 ((i < lun_cnt) && ((unsigned char *)(one_lun + i) < max_addr));
3360 i++, lun++) {
3361 upper = (lun >> 8) & 0x3f;
3362 if (upper)
3363 one_lun[i].scsi_lun[0] =
3364 (upper | (SAM2_LUN_ADDRESS_METHOD << 6));
3365 one_lun[i].scsi_lun[1] = lun & 0xff;
3366 }
3367 if (want_wlun) {
3368 one_lun[i].scsi_lun[0] = (SAM2_WLUN_REPORT_LUNS >> 8) & 0xff;
3369 one_lun[i].scsi_lun[1] = SAM2_WLUN_REPORT_LUNS & 0xff;
3370 i++;
3371 }
3372 alloc_len = (unsigned char *)(one_lun + i) - arr;
3373 return fill_from_dev_buffer(scp, arr,
3374 min((int)alloc_len, SDEBUG_RLUN_ARR_SZ));
3375 }
3376
3377 static int resp_xdwriteread(struct scsi_cmnd *scp, unsigned long long lba,
3378 unsigned int num, struct sdebug_dev_info *devip)
3379 {
3380 int j;
3381 unsigned char *kaddr, *buf;
3382 unsigned int offset;
3383 struct scsi_data_buffer *sdb = scsi_in(scp);
3384 struct sg_mapping_iter miter;
3385
3386 /* better not to use temporary buffer. */
3387 buf = kmalloc(scsi_bufflen(scp), GFP_ATOMIC);
3388 if (!buf) {
3389 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
3390 INSUFF_RES_ASCQ);
3391 return check_condition_result;
3392 }
3393
3394 scsi_sg_copy_to_buffer(scp, buf, scsi_bufflen(scp));
3395
3396 offset = 0;
3397 sg_miter_start(&miter, sdb->table.sgl, sdb->table.nents,
3398 SG_MITER_ATOMIC | SG_MITER_TO_SG);
3399
3400 while (sg_miter_next(&miter)) {
3401 kaddr = miter.addr;
3402 for (j = 0; j < miter.length; j++)
3403 *(kaddr + j) ^= *(buf + offset + j);
3404
3405 offset += miter.length;
3406 }
3407 sg_miter_stop(&miter);
3408 kfree(buf);
3409
3410 return 0;
3411 }
3412
3413 static int
3414 resp_xdwriteread_10(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
3415 {
3416 u8 *cmd = scp->cmnd;
3417 u64 lba;
3418 u32 num;
3419 int errsts;
3420
3421 if (!scsi_bidi_cmnd(scp)) {
3422 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
3423 INSUFF_RES_ASCQ);
3424 return check_condition_result;
3425 }
3426 errsts = resp_read_dt0(scp, devip);
3427 if (errsts)
3428 return errsts;
3429 if (!(cmd[1] & 0x4)) { /* DISABLE_WRITE is not set */
3430 errsts = resp_write_dt0(scp, devip);
3431 if (errsts)
3432 return errsts;
3433 }
3434 lba = get_unaligned_be32(cmd + 2);
3435 num = get_unaligned_be16(cmd + 7);
3436 return resp_xdwriteread(scp, lba, num, devip);
3437 }
3438
3439 /* When timer or tasklet goes off this function is called. */
3440 static void sdebug_q_cmd_complete(unsigned long indx)
3441 {
3442 int qa_indx;
3443 int retiring = 0;
3444 unsigned long iflags;
3445 struct sdebug_queued_cmd *sqcp;
3446 struct scsi_cmnd *scp;
3447 struct sdebug_dev_info *devip;
3448
3449 atomic_inc(&sdebug_completions);
3450 qa_indx = indx;
3451 if ((qa_indx < 0) || (qa_indx >= SCSI_DEBUG_CANQUEUE)) {
3452 pr_err("%s: wild qa_indx=%d\n", __func__, qa_indx);
3453 return;
3454 }
3455 spin_lock_irqsave(&queued_arr_lock, iflags);
3456 sqcp = &queued_arr[qa_indx];
3457 scp = sqcp->a_cmnd;
3458 if (NULL == scp) {
3459 spin_unlock_irqrestore(&queued_arr_lock, iflags);
3460 pr_err("%s: scp is NULL\n", __func__);
3461 return;
3462 }
3463 devip = (struct sdebug_dev_info *)scp->device->hostdata;
3464 if (devip)
3465 atomic_dec(&devip->num_in_q);
3466 else
3467 pr_err("%s: devip=NULL\n", __func__);
3468 if (atomic_read(&retired_max_queue) > 0)
3469 retiring = 1;
3470
3471 sqcp->a_cmnd = NULL;
3472 if (!test_and_clear_bit(qa_indx, queued_in_use_bm)) {
3473 spin_unlock_irqrestore(&queued_arr_lock, iflags);
3474 pr_err("%s: Unexpected completion\n", __func__);
3475 return;
3476 }
3477
3478 if (unlikely(retiring)) { /* user has reduced max_queue */
3479 int k, retval;
3480
3481 retval = atomic_read(&retired_max_queue);
3482 if (qa_indx >= retval) {
3483 spin_unlock_irqrestore(&queued_arr_lock, iflags);
3484 pr_err("%s: index %d too large\n", __func__, retval);
3485 return;
3486 }
3487 k = find_last_bit(queued_in_use_bm, retval);
3488 if ((k < scsi_debug_max_queue) || (k == retval))
3489 atomic_set(&retired_max_queue, 0);
3490 else
3491 atomic_set(&retired_max_queue, k + 1);
3492 }
3493 spin_unlock_irqrestore(&queued_arr_lock, iflags);
3494 scp->scsi_done(scp); /* callback to mid level */
3495 }
3496
3497 /* When high resolution timer goes off this function is called. */
3498 static enum hrtimer_restart
3499 sdebug_q_cmd_hrt_complete(struct hrtimer *timer)
3500 {
3501 int qa_indx;
3502 int retiring = 0;
3503 unsigned long iflags;
3504 struct sdebug_hrtimer *sd_hrtp = (struct sdebug_hrtimer *)timer;
3505 struct sdebug_queued_cmd *sqcp;
3506 struct scsi_cmnd *scp;
3507 struct sdebug_dev_info *devip;
3508
3509 atomic_inc(&sdebug_completions);
3510 qa_indx = sd_hrtp->qa_indx;
3511 if ((qa_indx < 0) || (qa_indx >= SCSI_DEBUG_CANQUEUE)) {
3512 pr_err("%s: wild qa_indx=%d\n", __func__, qa_indx);
3513 goto the_end;
3514 }
3515 spin_lock_irqsave(&queued_arr_lock, iflags);
3516 sqcp = &queued_arr[qa_indx];
3517 scp = sqcp->a_cmnd;
3518 if (NULL == scp) {
3519 spin_unlock_irqrestore(&queued_arr_lock, iflags);
3520 pr_err("%s: scp is NULL\n", __func__);
3521 goto the_end;
3522 }
3523 devip = (struct sdebug_dev_info *)scp->device->hostdata;
3524 if (devip)
3525 atomic_dec(&devip->num_in_q);
3526 else
3527 pr_err("%s: devip=NULL\n", __func__);
3528 if (atomic_read(&retired_max_queue) > 0)
3529 retiring = 1;
3530
3531 sqcp->a_cmnd = NULL;
3532 if (!test_and_clear_bit(qa_indx, queued_in_use_bm)) {
3533 spin_unlock_irqrestore(&queued_arr_lock, iflags);
3534 pr_err("%s: Unexpected completion\n", __func__);
3535 goto the_end;
3536 }
3537
3538 if (unlikely(retiring)) { /* user has reduced max_queue */
3539 int k, retval;
3540
3541 retval = atomic_read(&retired_max_queue);
3542 if (qa_indx >= retval) {
3543 spin_unlock_irqrestore(&queued_arr_lock, iflags);
3544 pr_err("%s: index %d too large\n", __func__, retval);
3545 goto the_end;
3546 }
3547 k = find_last_bit(queued_in_use_bm, retval);
3548 if ((k < scsi_debug_max_queue) || (k == retval))
3549 atomic_set(&retired_max_queue, 0);
3550 else
3551 atomic_set(&retired_max_queue, k + 1);
3552 }
3553 spin_unlock_irqrestore(&queued_arr_lock, iflags);
3554 scp->scsi_done(scp); /* callback to mid level */
3555 the_end:
3556 return HRTIMER_NORESTART;
3557 }
3558
3559 static struct sdebug_dev_info *
3560 sdebug_device_create(struct sdebug_host_info *sdbg_host, gfp_t flags)
3561 {
3562 struct sdebug_dev_info *devip;
3563
3564 devip = kzalloc(sizeof(*devip), flags);
3565 if (devip) {
3566 devip->sdbg_host = sdbg_host;
3567 list_add_tail(&devip->dev_list, &sdbg_host->dev_info_list);
3568 }
3569 return devip;
3570 }
3571
3572 static struct sdebug_dev_info * devInfoReg(struct scsi_device * sdev)
3573 {
3574 struct sdebug_host_info * sdbg_host;
3575 struct sdebug_dev_info * open_devip = NULL;
3576 struct sdebug_dev_info * devip =
3577 (struct sdebug_dev_info *)sdev->hostdata;
3578
3579 if (devip)
3580 return devip;
3581 sdbg_host = *(struct sdebug_host_info **)shost_priv(sdev->host);
3582 if (!sdbg_host) {
3583 pr_err("%s: Host info NULL\n", __func__);
3584 return NULL;
3585 }
3586 list_for_each_entry(devip, &sdbg_host->dev_info_list, dev_list) {
3587 if ((devip->used) && (devip->channel == sdev->channel) &&
3588 (devip->target == sdev->id) &&
3589 (devip->lun == sdev->lun))
3590 return devip;
3591 else {
3592 if ((!devip->used) && (!open_devip))
3593 open_devip = devip;
3594 }
3595 }
3596 if (!open_devip) { /* try and make a new one */
3597 open_devip = sdebug_device_create(sdbg_host, GFP_ATOMIC);
3598 if (!open_devip) {
3599 printk(KERN_ERR "%s: out of memory at line %d\n",
3600 __func__, __LINE__);
3601 return NULL;
3602 }
3603 }
3604
3605 open_devip->channel = sdev->channel;
3606 open_devip->target = sdev->id;
3607 open_devip->lun = sdev->lun;
3608 open_devip->sdbg_host = sdbg_host;
3609 atomic_set(&open_devip->num_in_q, 0);
3610 set_bit(SDEBUG_UA_POR, open_devip->uas_bm);
3611 open_devip->used = true;
3612 return open_devip;
3613 }
3614
3615 static int scsi_debug_slave_alloc(struct scsi_device *sdp)
3616 {
3617 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
3618 printk(KERN_INFO "scsi_debug: slave_alloc <%u %u %u %llu>\n",
3619 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
3620 queue_flag_set_unlocked(QUEUE_FLAG_BIDI, sdp->request_queue);
3621 return 0;
3622 }
3623
3624 static int scsi_debug_slave_configure(struct scsi_device *sdp)
3625 {
3626 struct sdebug_dev_info *devip;
3627
3628 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
3629 printk(KERN_INFO "scsi_debug: slave_configure <%u %u %u %llu>\n",
3630 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
3631 if (sdp->host->max_cmd_len != SCSI_DEBUG_MAX_CMD_LEN)
3632 sdp->host->max_cmd_len = SCSI_DEBUG_MAX_CMD_LEN;
3633 devip = devInfoReg(sdp);
3634 if (NULL == devip)
3635 return 1; /* no resources, will be marked offline */
3636 sdp->hostdata = devip;
3637 blk_queue_max_segment_size(sdp->request_queue, -1U);
3638 if (scsi_debug_no_uld)
3639 sdp->no_uld_attach = 1;
3640 return 0;
3641 }
3642
3643 static void scsi_debug_slave_destroy(struct scsi_device *sdp)
3644 {
3645 struct sdebug_dev_info *devip =
3646 (struct sdebug_dev_info *)sdp->hostdata;
3647
3648 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)
3649 printk(KERN_INFO "scsi_debug: slave_destroy <%u %u %u %llu>\n",
3650 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
3651 if (devip) {
3652 /* make this slot available for re-use */
3653 devip->used = false;
3654 sdp->hostdata = NULL;
3655 }
3656 }
3657
3658 /* Returns 1 if cmnd found (deletes its timer or tasklet), else returns 0 */
3659 static int stop_queued_cmnd(struct scsi_cmnd *cmnd)
3660 {
3661 unsigned long iflags;
3662 int k, qmax, r_qmax;
3663 struct sdebug_queued_cmd *sqcp;
3664 struct sdebug_dev_info *devip;
3665
3666 spin_lock_irqsave(&queued_arr_lock, iflags);
3667 qmax = scsi_debug_max_queue;
3668 r_qmax = atomic_read(&retired_max_queue);
3669 if (r_qmax > qmax)
3670 qmax = r_qmax;
3671 for (k = 0; k < qmax; ++k) {
3672 if (test_bit(k, queued_in_use_bm)) {
3673 sqcp = &queued_arr[k];
3674 if (cmnd == sqcp->a_cmnd) {
3675 devip = (struct sdebug_dev_info *)
3676 cmnd->device->hostdata;
3677 if (devip)
3678 atomic_dec(&devip->num_in_q);
3679 sqcp->a_cmnd = NULL;
3680 spin_unlock_irqrestore(&queued_arr_lock,
3681 iflags);
3682 if (scsi_debug_ndelay > 0) {
3683 if (sqcp->sd_hrtp)
3684 hrtimer_cancel(
3685 &sqcp->sd_hrtp->hrt);
3686 } else if (scsi_debug_delay > 0) {
3687 if (sqcp->cmnd_timerp)
3688 del_timer_sync(
3689 sqcp->cmnd_timerp);
3690 } else if (scsi_debug_delay < 0) {
3691 if (sqcp->tletp)
3692 tasklet_kill(sqcp->tletp);
3693 }
3694 clear_bit(k, queued_in_use_bm);
3695 return 1;
3696 }
3697 }
3698 }
3699 spin_unlock_irqrestore(&queued_arr_lock, iflags);
3700 return 0;
3701 }
3702
3703 /* Deletes (stops) timers or tasklets of all queued commands */
3704 static void stop_all_queued(void)
3705 {
3706 unsigned long iflags;
3707 int k;
3708 struct sdebug_queued_cmd *sqcp;
3709 struct sdebug_dev_info *devip;
3710
3711 spin_lock_irqsave(&queued_arr_lock, iflags);
3712 for (k = 0; k < SCSI_DEBUG_CANQUEUE; ++k) {
3713 if (test_bit(k, queued_in_use_bm)) {
3714 sqcp = &queued_arr[k];
3715 if (sqcp->a_cmnd) {
3716 devip = (struct sdebug_dev_info *)
3717 sqcp->a_cmnd->device->hostdata;
3718 if (devip)
3719 atomic_dec(&devip->num_in_q);
3720 sqcp->a_cmnd = NULL;
3721 spin_unlock_irqrestore(&queued_arr_lock,
3722 iflags);
3723 if (scsi_debug_ndelay > 0) {
3724 if (sqcp->sd_hrtp)
3725 hrtimer_cancel(
3726 &sqcp->sd_hrtp->hrt);
3727 } else if (scsi_debug_delay > 0) {
3728 if (sqcp->cmnd_timerp)
3729 del_timer_sync(
3730 sqcp->cmnd_timerp);
3731 } else if (scsi_debug_delay < 0) {
3732 if (sqcp->tletp)
3733 tasklet_kill(sqcp->tletp);
3734 }
3735 clear_bit(k, queued_in_use_bm);
3736 spin_lock_irqsave(&queued_arr_lock, iflags);
3737 }
3738 }
3739 }
3740 spin_unlock_irqrestore(&queued_arr_lock, iflags);
3741 }
3742
3743 /* Free queued command memory on heap */
3744 static void free_all_queued(void)
3745 {
3746 unsigned long iflags;
3747 int k;
3748 struct sdebug_queued_cmd *sqcp;
3749
3750 spin_lock_irqsave(&queued_arr_lock, iflags);
3751 for (k = 0; k < SCSI_DEBUG_CANQUEUE; ++k) {
3752 sqcp = &queued_arr[k];
3753 kfree(sqcp->cmnd_timerp);
3754 sqcp->cmnd_timerp = NULL;
3755 kfree(sqcp->tletp);
3756 sqcp->tletp = NULL;
3757 kfree(sqcp->sd_hrtp);
3758 sqcp->sd_hrtp = NULL;
3759 }
3760 spin_unlock_irqrestore(&queued_arr_lock, iflags);
3761 }
3762
3763 static int scsi_debug_abort(struct scsi_cmnd *SCpnt)
3764 {
3765 ++num_aborts;
3766 if (SCpnt) {
3767 if (SCpnt->device &&
3768 (SCSI_DEBUG_OPT_ALL_NOISE & scsi_debug_opts))
3769 sdev_printk(KERN_INFO, SCpnt->device, "%s\n",
3770 __func__);
3771 stop_queued_cmnd(SCpnt);
3772 }
3773 return SUCCESS;
3774 }
3775
3776 static int scsi_debug_device_reset(struct scsi_cmnd * SCpnt)
3777 {
3778 struct sdebug_dev_info * devip;
3779
3780 ++num_dev_resets;
3781 if (SCpnt && SCpnt->device) {
3782 struct scsi_device *sdp = SCpnt->device;
3783
3784 if (SCSI_DEBUG_OPT_ALL_NOISE & scsi_debug_opts)
3785 sdev_printk(KERN_INFO, sdp, "%s\n", __func__);
3786 devip = devInfoReg(sdp);
3787 if (devip)
3788 set_bit(SDEBUG_UA_POR, devip->uas_bm);
3789 }
3790 return SUCCESS;
3791 }
3792
3793 static int scsi_debug_target_reset(struct scsi_cmnd *SCpnt)
3794 {
3795 struct sdebug_host_info *sdbg_host;
3796 struct sdebug_dev_info *devip;
3797 struct scsi_device *sdp;
3798 struct Scsi_Host *hp;
3799 int k = 0;
3800
3801 ++num_target_resets;
3802 if (!SCpnt)
3803 goto lie;
3804 sdp = SCpnt->device;
3805 if (!sdp)
3806 goto lie;
3807 if (SCSI_DEBUG_OPT_ALL_NOISE & scsi_debug_opts)
3808 sdev_printk(KERN_INFO, sdp, "%s\n", __func__);
3809 hp = sdp->host;
3810 if (!hp)
3811 goto lie;
3812 sdbg_host = *(struct sdebug_host_info **)shost_priv(hp);
3813 if (sdbg_host) {
3814 list_for_each_entry(devip,
3815 &sdbg_host->dev_info_list,
3816 dev_list)
3817 if (devip->target == sdp->id) {
3818 set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm);
3819 ++k;
3820 }
3821 }
3822 if (SCSI_DEBUG_OPT_RESET_NOISE & scsi_debug_opts)
3823 sdev_printk(KERN_INFO, sdp,
3824 "%s: %d device(s) found in target\n", __func__, k);
3825 lie:
3826 return SUCCESS;
3827 }
3828
3829 static int scsi_debug_bus_reset(struct scsi_cmnd * SCpnt)
3830 {
3831 struct sdebug_host_info *sdbg_host;
3832 struct sdebug_dev_info *devip;
3833 struct scsi_device * sdp;
3834 struct Scsi_Host * hp;
3835 int k = 0;
3836
3837 ++num_bus_resets;
3838 if (!(SCpnt && SCpnt->device))
3839 goto lie;
3840 sdp = SCpnt->device;
3841 if (SCSI_DEBUG_OPT_ALL_NOISE & scsi_debug_opts)
3842 sdev_printk(KERN_INFO, sdp, "%s\n", __func__);
3843 hp = sdp->host;
3844 if (hp) {
3845 sdbg_host = *(struct sdebug_host_info **)shost_priv(hp);
3846 if (sdbg_host) {
3847 list_for_each_entry(devip,
3848 &sdbg_host->dev_info_list,
3849 dev_list) {
3850 set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm);
3851 ++k;
3852 }
3853 }
3854 }
3855 if (SCSI_DEBUG_OPT_RESET_NOISE & scsi_debug_opts)
3856 sdev_printk(KERN_INFO, sdp,
3857 "%s: %d device(s) found in host\n", __func__, k);
3858 lie:
3859 return SUCCESS;
3860 }
3861
3862 static int scsi_debug_host_reset(struct scsi_cmnd * SCpnt)
3863 {
3864 struct sdebug_host_info * sdbg_host;
3865 struct sdebug_dev_info *devip;
3866 int k = 0;
3867
3868 ++num_host_resets;
3869 if ((SCpnt->device) && (SCSI_DEBUG_OPT_ALL_NOISE & scsi_debug_opts))
3870 sdev_printk(KERN_INFO, SCpnt->device, "%s\n", __func__);
3871 spin_lock(&sdebug_host_list_lock);
3872 list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) {
3873 list_for_each_entry(devip, &sdbg_host->dev_info_list,
3874 dev_list) {
3875 set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm);
3876 ++k;
3877 }
3878 }
3879 spin_unlock(&sdebug_host_list_lock);
3880 stop_all_queued();
3881 if (SCSI_DEBUG_OPT_RESET_NOISE & scsi_debug_opts)
3882 sdev_printk(KERN_INFO, SCpnt->device,
3883 "%s: %d device(s) found\n", __func__, k);
3884 return SUCCESS;
3885 }
3886
3887 static void __init sdebug_build_parts(unsigned char *ramp,
3888 unsigned long store_size)
3889 {
3890 struct partition * pp;
3891 int starts[SDEBUG_MAX_PARTS + 2];
3892 int sectors_per_part, num_sectors, k;
3893 int heads_by_sects, start_sec, end_sec;
3894
3895 /* assume partition table already zeroed */
3896 if ((scsi_debug_num_parts < 1) || (store_size < 1048576))
3897 return;
3898 if (scsi_debug_num_parts > SDEBUG_MAX_PARTS) {
3899 scsi_debug_num_parts = SDEBUG_MAX_PARTS;
3900 pr_warn("%s: reducing partitions to %d\n", __func__,
3901 SDEBUG_MAX_PARTS);
3902 }
3903 num_sectors = (int)sdebug_store_sectors;
3904 sectors_per_part = (num_sectors - sdebug_sectors_per)
3905 / scsi_debug_num_parts;
3906 heads_by_sects = sdebug_heads * sdebug_sectors_per;
3907 starts[0] = sdebug_sectors_per;
3908 for (k = 1; k < scsi_debug_num_parts; ++k)
3909 starts[k] = ((k * sectors_per_part) / heads_by_sects)
3910 * heads_by_sects;
3911 starts[scsi_debug_num_parts] = num_sectors;
3912 starts[scsi_debug_num_parts + 1] = 0;
3913
3914 ramp[510] = 0x55; /* magic partition markings */
3915 ramp[511] = 0xAA;
3916 pp = (struct partition *)(ramp + 0x1be);
3917 for (k = 0; starts[k + 1]; ++k, ++pp) {
3918 start_sec = starts[k];
3919 end_sec = starts[k + 1] - 1;
3920 pp->boot_ind = 0;
3921
3922 pp->cyl = start_sec / heads_by_sects;
3923 pp->head = (start_sec - (pp->cyl * heads_by_sects))
3924 / sdebug_sectors_per;
3925 pp->sector = (start_sec % sdebug_sectors_per) + 1;
3926
3927 pp->end_cyl = end_sec / heads_by_sects;
3928 pp->end_head = (end_sec - (pp->end_cyl * heads_by_sects))
3929 / sdebug_sectors_per;
3930 pp->end_sector = (end_sec % sdebug_sectors_per) + 1;
3931
3932 pp->start_sect = cpu_to_le32(start_sec);
3933 pp->nr_sects = cpu_to_le32(end_sec - start_sec + 1);
3934 pp->sys_ind = 0x83; /* plain Linux partition */
3935 }
3936 }
3937
3938 static int
3939 schedule_resp(struct scsi_cmnd *cmnd, struct sdebug_dev_info *devip,
3940 int scsi_result, int delta_jiff)
3941 {
3942 unsigned long iflags;
3943 int k, num_in_q, qdepth, inject;
3944 struct sdebug_queued_cmd *sqcp = NULL;
3945 struct scsi_device *sdp = cmnd->device;
3946
3947 if (NULL == cmnd || NULL == devip) {
3948 pr_warn("%s: called with NULL cmnd or devip pointer\n",
3949 __func__);
3950 /* no particularly good error to report back */
3951 return SCSI_MLQUEUE_HOST_BUSY;
3952 }
3953 if ((scsi_result) && (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts))
3954 sdev_printk(KERN_INFO, sdp, "%s: non-zero result=0x%x\n",
3955 __func__, scsi_result);
3956 if (delta_jiff == 0)
3957 goto respond_in_thread;
3958
3959 /* schedule the response at a later time if resources permit */
3960 spin_lock_irqsave(&queued_arr_lock, iflags);
3961 num_in_q = atomic_read(&devip->num_in_q);
3962 qdepth = cmnd->device->queue_depth;
3963 inject = 0;
3964 if ((qdepth > 0) && (num_in_q >= qdepth)) {
3965 if (scsi_result) {
3966 spin_unlock_irqrestore(&queued_arr_lock, iflags);
3967 goto respond_in_thread;
3968 } else
3969 scsi_result = device_qfull_result;
3970 } else if ((scsi_debug_every_nth != 0) &&
3971 (SCSI_DEBUG_OPT_RARE_TSF & scsi_debug_opts) &&
3972 (scsi_result == 0)) {
3973 if ((num_in_q == (qdepth - 1)) &&
3974 (atomic_inc_return(&sdebug_a_tsf) >=
3975 abs(scsi_debug_every_nth))) {
3976 atomic_set(&sdebug_a_tsf, 0);
3977 inject = 1;
3978 scsi_result = device_qfull_result;
3979 }
3980 }
3981
3982 k = find_first_zero_bit(queued_in_use_bm, scsi_debug_max_queue);
3983 if (k >= scsi_debug_max_queue) {
3984 spin_unlock_irqrestore(&queued_arr_lock, iflags);
3985 if (scsi_result)
3986 goto respond_in_thread;
3987 else if (SCSI_DEBUG_OPT_ALL_TSF & scsi_debug_opts)
3988 scsi_result = device_qfull_result;
3989 if (SCSI_DEBUG_OPT_Q_NOISE & scsi_debug_opts)
3990 sdev_printk(KERN_INFO, sdp,
3991 "%s: max_queue=%d exceeded, %s\n",
3992 __func__, scsi_debug_max_queue,
3993 (scsi_result ? "status: TASK SET FULL" :
3994 "report: host busy"));
3995 if (scsi_result)
3996 goto respond_in_thread;
3997 else
3998 return SCSI_MLQUEUE_HOST_BUSY;
3999 }
4000 __set_bit(k, queued_in_use_bm);
4001 atomic_inc(&devip->num_in_q);
4002 sqcp = &queued_arr[k];
4003 sqcp->a_cmnd = cmnd;
4004 cmnd->result = scsi_result;
4005 spin_unlock_irqrestore(&queued_arr_lock, iflags);
4006 if (delta_jiff > 0) {
4007 if (NULL == sqcp->cmnd_timerp) {
4008 sqcp->cmnd_timerp = kmalloc(sizeof(struct timer_list),
4009 GFP_ATOMIC);
4010 if (NULL == sqcp->cmnd_timerp)
4011 return SCSI_MLQUEUE_HOST_BUSY;
4012 init_timer(sqcp->cmnd_timerp);
4013 }
4014 sqcp->cmnd_timerp->function = sdebug_q_cmd_complete;
4015 sqcp->cmnd_timerp->data = k;
4016 sqcp->cmnd_timerp->expires = get_jiffies_64() + delta_jiff;
4017 add_timer(sqcp->cmnd_timerp);
4018 } else if (scsi_debug_ndelay > 0) {
4019 ktime_t kt = ktime_set(0, scsi_debug_ndelay);
4020 struct sdebug_hrtimer *sd_hp = sqcp->sd_hrtp;
4021
4022 if (NULL == sd_hp) {
4023 sd_hp = kmalloc(sizeof(*sd_hp), GFP_ATOMIC);
4024 if (NULL == sd_hp)
4025 return SCSI_MLQUEUE_HOST_BUSY;
4026 sqcp->sd_hrtp = sd_hp;
4027 hrtimer_init(&sd_hp->hrt, CLOCK_MONOTONIC,
4028 HRTIMER_MODE_REL);
4029 sd_hp->hrt.function = sdebug_q_cmd_hrt_complete;
4030 sd_hp->qa_indx = k;
4031 }
4032 hrtimer_start(&sd_hp->hrt, kt, HRTIMER_MODE_REL);
4033 } else { /* delay < 0 */
4034 if (NULL == sqcp->tletp) {
4035 sqcp->tletp = kmalloc(sizeof(*sqcp->tletp),
4036 GFP_ATOMIC);
4037 if (NULL == sqcp->tletp)
4038 return SCSI_MLQUEUE_HOST_BUSY;
4039 tasklet_init(sqcp->tletp,
4040 sdebug_q_cmd_complete, k);
4041 }
4042 if (-1 == delta_jiff)
4043 tasklet_hi_schedule(sqcp->tletp);
4044 else
4045 tasklet_schedule(sqcp->tletp);
4046 }
4047 if ((SCSI_DEBUG_OPT_Q_NOISE & scsi_debug_opts) &&
4048 (scsi_result == device_qfull_result))
4049 sdev_printk(KERN_INFO, sdp,
4050 "%s: num_in_q=%d +1, %s%s\n", __func__,
4051 num_in_q, (inject ? "<inject> " : ""),
4052 "status: TASK SET FULL");
4053 return 0;
4054
4055 respond_in_thread: /* call back to mid-layer using invocation thread */
4056 cmnd->result = scsi_result;
4057 cmnd->scsi_done(cmnd);
4058 return 0;
4059 }
4060
4061 /* Note: The following macros create attribute files in the
4062 /sys/module/scsi_debug/parameters directory. Unfortunately this
4063 driver is unaware of a change and cannot trigger auxiliary actions
4064 as it can when the corresponding attribute in the
4065 /sys/bus/pseudo/drivers/scsi_debug directory is changed.
4066 */
4067 module_param_named(add_host, scsi_debug_add_host, int, S_IRUGO | S_IWUSR);
4068 module_param_named(ato, scsi_debug_ato, int, S_IRUGO);
4069 module_param_named(clustering, scsi_debug_clustering, bool, S_IRUGO | S_IWUSR);
4070 module_param_named(delay, scsi_debug_delay, int, S_IRUGO | S_IWUSR);
4071 module_param_named(dev_size_mb, scsi_debug_dev_size_mb, int, S_IRUGO);
4072 module_param_named(dif, scsi_debug_dif, int, S_IRUGO);
4073 module_param_named(dix, scsi_debug_dix, int, S_IRUGO);
4074 module_param_named(dsense, scsi_debug_dsense, int, S_IRUGO | S_IWUSR);
4075 module_param_named(every_nth, scsi_debug_every_nth, int, S_IRUGO | S_IWUSR);
4076 module_param_named(fake_rw, scsi_debug_fake_rw, int, S_IRUGO | S_IWUSR);
4077 module_param_named(guard, scsi_debug_guard, uint, S_IRUGO);
4078 module_param_named(host_lock, scsi_debug_host_lock, bool, S_IRUGO | S_IWUSR);
4079 module_param_named(lbpu, scsi_debug_lbpu, int, S_IRUGO);
4080 module_param_named(lbpws, scsi_debug_lbpws, int, S_IRUGO);
4081 module_param_named(lbpws10, scsi_debug_lbpws10, int, S_IRUGO);
4082 module_param_named(lbprz, scsi_debug_lbprz, int, S_IRUGO);
4083 module_param_named(lowest_aligned, scsi_debug_lowest_aligned, int, S_IRUGO);
4084 module_param_named(max_luns, scsi_debug_max_luns, int, S_IRUGO | S_IWUSR);
4085 module_param_named(max_queue, scsi_debug_max_queue, int, S_IRUGO | S_IWUSR);
4086 module_param_named(ndelay, scsi_debug_ndelay, int, S_IRUGO | S_IWUSR);
4087 module_param_named(no_lun_0, scsi_debug_no_lun_0, int, S_IRUGO | S_IWUSR);
4088 module_param_named(no_uld, scsi_debug_no_uld, int, S_IRUGO);
4089 module_param_named(num_parts, scsi_debug_num_parts, int, S_IRUGO);
4090 module_param_named(num_tgts, scsi_debug_num_tgts, int, S_IRUGO | S_IWUSR);
4091 module_param_named(opt_blks, scsi_debug_opt_blks, int, S_IRUGO);
4092 module_param_named(opts, scsi_debug_opts, int, S_IRUGO | S_IWUSR);
4093 module_param_named(physblk_exp, scsi_debug_physblk_exp, int, S_IRUGO);
4094 module_param_named(ptype, scsi_debug_ptype, int, S_IRUGO | S_IWUSR);
4095 module_param_named(removable, scsi_debug_removable, bool, S_IRUGO | S_IWUSR);
4096 module_param_named(scsi_level, scsi_debug_scsi_level, int, S_IRUGO);
4097 module_param_named(sector_size, scsi_debug_sector_size, int, S_IRUGO);
4098 module_param_named(strict, scsi_debug_strict, bool, S_IRUGO | S_IWUSR);
4099 module_param_named(unmap_alignment, scsi_debug_unmap_alignment, int, S_IRUGO);
4100 module_param_named(unmap_granularity, scsi_debug_unmap_granularity, int, S_IRUGO);
4101 module_param_named(unmap_max_blocks, scsi_debug_unmap_max_blocks, int, S_IRUGO);
4102 module_param_named(unmap_max_desc, scsi_debug_unmap_max_desc, int, S_IRUGO);
4103 module_param_named(virtual_gb, scsi_debug_virtual_gb, int, S_IRUGO | S_IWUSR);
4104 module_param_named(vpd_use_hostno, scsi_debug_vpd_use_hostno, int,
4105 S_IRUGO | S_IWUSR);
4106 module_param_named(write_same_length, scsi_debug_write_same_length, int,
4107 S_IRUGO | S_IWUSR);
4108
4109 MODULE_AUTHOR("Eric Youngdale + Douglas Gilbert");
4110 MODULE_DESCRIPTION("SCSI debug adapter driver");
4111 MODULE_LICENSE("GPL");
4112 MODULE_VERSION(SCSI_DEBUG_VERSION);
4113
4114 MODULE_PARM_DESC(add_host, "0..127 hosts allowed(def=1)");
4115 MODULE_PARM_DESC(ato, "application tag ownership: 0=disk 1=host (def=1)");
4116 MODULE_PARM_DESC(clustering, "when set enables larger transfers (def=0)");
4117 MODULE_PARM_DESC(delay, "response delay (def=1 jiffy); 0:imm, -1,-2:tiny");
4118 MODULE_PARM_DESC(dev_size_mb, "size in MiB of ram shared by devs(def=8)");
4119 MODULE_PARM_DESC(dif, "data integrity field type: 0-3 (def=0)");
4120 MODULE_PARM_DESC(dix, "data integrity extensions mask (def=0)");
4121 MODULE_PARM_DESC(dsense, "use descriptor sense format(def=0 -> fixed)");
4122 MODULE_PARM_DESC(every_nth, "timeout every nth command(def=0)");
4123 MODULE_PARM_DESC(fake_rw, "fake reads/writes instead of copying (def=0)");
4124 MODULE_PARM_DESC(guard, "protection checksum: 0=crc, 1=ip (def=0)");
4125 MODULE_PARM_DESC(host_lock, "use host_lock around all commands (def=0)");
4126 MODULE_PARM_DESC(lbpu, "enable LBP, support UNMAP command (def=0)");
4127 MODULE_PARM_DESC(lbpws, "enable LBP, support WRITE SAME(16) with UNMAP bit (def=0)");
4128 MODULE_PARM_DESC(lbpws10, "enable LBP, support WRITE SAME(10) with UNMAP bit (def=0)");
4129 MODULE_PARM_DESC(lbprz, "unmapped blocks return 0 on read (def=1)");
4130 MODULE_PARM_DESC(lowest_aligned, "lowest aligned lba (def=0)");
4131 MODULE_PARM_DESC(max_luns, "number of LUNs per target to simulate(def=1)");
4132 MODULE_PARM_DESC(max_queue, "max number of queued commands (1 to max(def))");
4133 MODULE_PARM_DESC(ndelay, "response delay in nanoseconds (def=0 -> ignore)");
4134 MODULE_PARM_DESC(no_lun_0, "no LU number 0 (def=0 -> have lun 0)");
4135 MODULE_PARM_DESC(no_uld, "stop ULD (e.g. sd driver) attaching (def=0))");
4136 MODULE_PARM_DESC(num_parts, "number of partitions(def=0)");
4137 MODULE_PARM_DESC(num_tgts, "number of targets per host to simulate(def=1)");
4138 MODULE_PARM_DESC(opt_blks, "optimal transfer length in block (def=64)");
4139 MODULE_PARM_DESC(opts, "1->noise, 2->medium_err, 4->timeout, 8->recovered_err... (def=0)");
4140 MODULE_PARM_DESC(physblk_exp, "physical block exponent (def=0)");
4141 MODULE_PARM_DESC(ptype, "SCSI peripheral type(def=0[disk])");
4142 MODULE_PARM_DESC(removable, "claim to have removable media (def=0)");
4143 MODULE_PARM_DESC(scsi_level, "SCSI level to simulate(def=6[SPC-4])");
4144 MODULE_PARM_DESC(sector_size, "logical block size in bytes (def=512)");
4145 MODULE_PARM_DESC(strict, "stricter checks: reserved field in cdb (def=0)");
4146 MODULE_PARM_DESC(unmap_alignment, "lowest aligned thin provisioning lba (def=0)");
4147 MODULE_PARM_DESC(unmap_granularity, "thin provisioning granularity in blocks (def=1)");
4148 MODULE_PARM_DESC(unmap_max_blocks, "max # of blocks can be unmapped in one cmd (def=0xffffffff)");
4149 MODULE_PARM_DESC(unmap_max_desc, "max # of ranges that can be unmapped in one cmd (def=256)");
4150 MODULE_PARM_DESC(virtual_gb, "virtual gigabyte (GiB) size (def=0 -> use dev_size_mb)");
4151 MODULE_PARM_DESC(vpd_use_hostno, "0 -> dev ids ignore hostno (def=1 -> unique dev ids)");
4152 MODULE_PARM_DESC(write_same_length, "Maximum blocks per WRITE SAME cmd (def=0xffff)");
4153
4154 static char sdebug_info[256];
4155
4156 static const char * scsi_debug_info(struct Scsi_Host * shp)
4157 {
4158 sprintf(sdebug_info, "scsi_debug, version %s [%s], "
4159 "dev_size_mb=%d, opts=0x%x", SCSI_DEBUG_VERSION,
4160 scsi_debug_version_date, scsi_debug_dev_size_mb,
4161 scsi_debug_opts);
4162 return sdebug_info;
4163 }
4164
4165 /* 'echo <val> > /proc/scsi/scsi_debug/<host_id>' writes to opts */
4166 static int scsi_debug_write_info(struct Scsi_Host *host, char *buffer, int length)
4167 {
4168 char arr[16];
4169 int opts;
4170 int minLen = length > 15 ? 15 : length;
4171
4172 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
4173 return -EACCES;
4174 memcpy(arr, buffer, minLen);
4175 arr[minLen] = '\0';
4176 if (1 != sscanf(arr, "%d", &opts))
4177 return -EINVAL;
4178 scsi_debug_opts = opts;
4179 if (scsi_debug_every_nth != 0)
4180 atomic_set(&sdebug_cmnd_count, 0);
4181 return length;
4182 }
4183
4184 /* Output seen with 'cat /proc/scsi/scsi_debug/<host_id>'. It will be the
4185 * same for each scsi_debug host (if more than one). Some of the counters
4186 * output are not atomics so might be inaccurate in a busy system. */
4187 static int scsi_debug_show_info(struct seq_file *m, struct Scsi_Host *host)
4188 {
4189 int f, l;
4190 char b[32];
4191
4192 if (scsi_debug_every_nth > 0)
4193 snprintf(b, sizeof(b), " (curr:%d)",
4194 ((SCSI_DEBUG_OPT_RARE_TSF & scsi_debug_opts) ?
4195 atomic_read(&sdebug_a_tsf) :
4196 atomic_read(&sdebug_cmnd_count)));
4197 else
4198 b[0] = '\0';
4199
4200 seq_printf(m, "scsi_debug adapter driver, version %s [%s]\n"
4201 "num_tgts=%d, shared (ram) size=%d MB, opts=0x%x, "
4202 "every_nth=%d%s\n"
4203 "delay=%d, ndelay=%d, max_luns=%d, q_completions=%d\n"
4204 "sector_size=%d bytes, cylinders=%d, heads=%d, sectors=%d\n"
4205 "command aborts=%d; RESETs: device=%d, target=%d, bus=%d, "
4206 "host=%d\ndix_reads=%d dix_writes=%d dif_errors=%d "
4207 "usec_in_jiffy=%lu\n",
4208 SCSI_DEBUG_VERSION, scsi_debug_version_date,
4209 scsi_debug_num_tgts, scsi_debug_dev_size_mb, scsi_debug_opts,
4210 scsi_debug_every_nth, b, scsi_debug_delay, scsi_debug_ndelay,
4211 scsi_debug_max_luns, atomic_read(&sdebug_completions),
4212 scsi_debug_sector_size, sdebug_cylinders_per, sdebug_heads,
4213 sdebug_sectors_per, num_aborts, num_dev_resets,
4214 num_target_resets, num_bus_resets, num_host_resets,
4215 dix_reads, dix_writes, dif_errors, TICK_NSEC / 1000);
4216
4217 f = find_first_bit(queued_in_use_bm, scsi_debug_max_queue);
4218 if (f != scsi_debug_max_queue) {
4219 l = find_last_bit(queued_in_use_bm, scsi_debug_max_queue);
4220 seq_printf(m, " %s BUSY: first,last bits set: %d,%d\n",
4221 "queued_in_use_bm", f, l);
4222 }
4223 return 0;
4224 }
4225
4226 static ssize_t delay_show(struct device_driver *ddp, char *buf)
4227 {
4228 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_delay);
4229 }
4230 /* Returns -EBUSY if delay is being changed and commands are queued */
4231 static ssize_t delay_store(struct device_driver *ddp, const char *buf,
4232 size_t count)
4233 {
4234 int delay, res;
4235
4236 if ((count > 0) && (1 == sscanf(buf, "%d", &delay))) {
4237 res = count;
4238 if (scsi_debug_delay != delay) {
4239 unsigned long iflags;
4240 int k;
4241
4242 spin_lock_irqsave(&queued_arr_lock, iflags);
4243 k = find_first_bit(queued_in_use_bm,
4244 scsi_debug_max_queue);
4245 if (k != scsi_debug_max_queue)
4246 res = -EBUSY; /* have queued commands */
4247 else {
4248 scsi_debug_delay = delay;
4249 scsi_debug_ndelay = 0;
4250 }
4251 spin_unlock_irqrestore(&queued_arr_lock, iflags);
4252 }
4253 return res;
4254 }
4255 return -EINVAL;
4256 }
4257 static DRIVER_ATTR_RW(delay);
4258
4259 static ssize_t ndelay_show(struct device_driver *ddp, char *buf)
4260 {
4261 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_ndelay);
4262 }
4263 /* Returns -EBUSY if ndelay is being changed and commands are queued */
4264 /* If > 0 and accepted then scsi_debug_delay is set to DELAY_OVERRIDDEN */
4265 static ssize_t ndelay_store(struct device_driver *ddp, const char *buf,
4266 size_t count)
4267 {
4268 unsigned long iflags;
4269 int ndelay, res, k;
4270
4271 if ((count > 0) && (1 == sscanf(buf, "%d", &ndelay)) &&
4272 (ndelay >= 0) && (ndelay < 1000000000)) {
4273 res = count;
4274 if (scsi_debug_ndelay != ndelay) {
4275 spin_lock_irqsave(&queued_arr_lock, iflags);
4276 k = find_first_bit(queued_in_use_bm,
4277 scsi_debug_max_queue);
4278 if (k != scsi_debug_max_queue)
4279 res = -EBUSY; /* have queued commands */
4280 else {
4281 scsi_debug_ndelay = ndelay;
4282 scsi_debug_delay = ndelay ? DELAY_OVERRIDDEN
4283 : DEF_DELAY;
4284 }
4285 spin_unlock_irqrestore(&queued_arr_lock, iflags);
4286 }
4287 return res;
4288 }
4289 return -EINVAL;
4290 }
4291 static DRIVER_ATTR_RW(ndelay);
4292
4293 static ssize_t opts_show(struct device_driver *ddp, char *buf)
4294 {
4295 return scnprintf(buf, PAGE_SIZE, "0x%x\n", scsi_debug_opts);
4296 }
4297
4298 static ssize_t opts_store(struct device_driver *ddp, const char *buf,
4299 size_t count)
4300 {
4301 int opts;
4302 char work[20];
4303
4304 if (1 == sscanf(buf, "%10s", work)) {
4305 if (0 == strncasecmp(work,"0x", 2)) {
4306 if (1 == sscanf(&work[2], "%x", &opts))
4307 goto opts_done;
4308 } else {
4309 if (1 == sscanf(work, "%d", &opts))
4310 goto opts_done;
4311 }
4312 }
4313 return -EINVAL;
4314 opts_done:
4315 scsi_debug_opts = opts;
4316 if (SCSI_DEBUG_OPT_RECOVERED_ERR & opts)
4317 sdebug_any_injecting_opt = true;
4318 else if (SCSI_DEBUG_OPT_TRANSPORT_ERR & opts)
4319 sdebug_any_injecting_opt = true;
4320 else if (SCSI_DEBUG_OPT_DIF_ERR & opts)
4321 sdebug_any_injecting_opt = true;
4322 else if (SCSI_DEBUG_OPT_DIX_ERR & opts)
4323 sdebug_any_injecting_opt = true;
4324 else if (SCSI_DEBUG_OPT_SHORT_TRANSFER & opts)
4325 sdebug_any_injecting_opt = true;
4326 atomic_set(&sdebug_cmnd_count, 0);
4327 atomic_set(&sdebug_a_tsf, 0);
4328 return count;
4329 }
4330 static DRIVER_ATTR_RW(opts);
4331
4332 static ssize_t ptype_show(struct device_driver *ddp, char *buf)
4333 {
4334 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_ptype);
4335 }
4336 static ssize_t ptype_store(struct device_driver *ddp, const char *buf,
4337 size_t count)
4338 {
4339 int n;
4340
4341 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
4342 scsi_debug_ptype = n;
4343 return count;
4344 }
4345 return -EINVAL;
4346 }
4347 static DRIVER_ATTR_RW(ptype);
4348
4349 static ssize_t dsense_show(struct device_driver *ddp, char *buf)
4350 {
4351 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dsense);
4352 }
4353 static ssize_t dsense_store(struct device_driver *ddp, const char *buf,
4354 size_t count)
4355 {
4356 int n;
4357
4358 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
4359 scsi_debug_dsense = n;
4360 return count;
4361 }
4362 return -EINVAL;
4363 }
4364 static DRIVER_ATTR_RW(dsense);
4365
4366 static ssize_t fake_rw_show(struct device_driver *ddp, char *buf)
4367 {
4368 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_fake_rw);
4369 }
4370 static ssize_t fake_rw_store(struct device_driver *ddp, const char *buf,
4371 size_t count)
4372 {
4373 int n;
4374
4375 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
4376 n = (n > 0);
4377 scsi_debug_fake_rw = (scsi_debug_fake_rw > 0);
4378 if (scsi_debug_fake_rw != n) {
4379 if ((0 == n) && (NULL == fake_storep)) {
4380 unsigned long sz =
4381 (unsigned long)scsi_debug_dev_size_mb *
4382 1048576;
4383
4384 fake_storep = vmalloc(sz);
4385 if (NULL == fake_storep) {
4386 pr_err("%s: out of memory, 9\n",
4387 __func__);
4388 return -ENOMEM;
4389 }
4390 memset(fake_storep, 0, sz);
4391 }
4392 scsi_debug_fake_rw = n;
4393 }
4394 return count;
4395 }
4396 return -EINVAL;
4397 }
4398 static DRIVER_ATTR_RW(fake_rw);
4399
4400 static ssize_t no_lun_0_show(struct device_driver *ddp, char *buf)
4401 {
4402 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_no_lun_0);
4403 }
4404 static ssize_t no_lun_0_store(struct device_driver *ddp, const char *buf,
4405 size_t count)
4406 {
4407 int n;
4408
4409 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
4410 scsi_debug_no_lun_0 = n;
4411 return count;
4412 }
4413 return -EINVAL;
4414 }
4415 static DRIVER_ATTR_RW(no_lun_0);
4416
4417 static ssize_t num_tgts_show(struct device_driver *ddp, char *buf)
4418 {
4419 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_num_tgts);
4420 }
4421 static ssize_t num_tgts_store(struct device_driver *ddp, const char *buf,
4422 size_t count)
4423 {
4424 int n;
4425
4426 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
4427 scsi_debug_num_tgts = n;
4428 sdebug_max_tgts_luns();
4429 return count;
4430 }
4431 return -EINVAL;
4432 }
4433 static DRIVER_ATTR_RW(num_tgts);
4434
4435 static ssize_t dev_size_mb_show(struct device_driver *ddp, char *buf)
4436 {
4437 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dev_size_mb);
4438 }
4439 static DRIVER_ATTR_RO(dev_size_mb);
4440
4441 static ssize_t num_parts_show(struct device_driver *ddp, char *buf)
4442 {
4443 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_num_parts);
4444 }
4445 static DRIVER_ATTR_RO(num_parts);
4446
4447 static ssize_t every_nth_show(struct device_driver *ddp, char *buf)
4448 {
4449 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_every_nth);
4450 }
4451 static ssize_t every_nth_store(struct device_driver *ddp, const char *buf,
4452 size_t count)
4453 {
4454 int nth;
4455
4456 if ((count > 0) && (1 == sscanf(buf, "%d", &nth))) {
4457 scsi_debug_every_nth = nth;
4458 atomic_set(&sdebug_cmnd_count, 0);
4459 return count;
4460 }
4461 return -EINVAL;
4462 }
4463 static DRIVER_ATTR_RW(every_nth);
4464
4465 static ssize_t max_luns_show(struct device_driver *ddp, char *buf)
4466 {
4467 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_max_luns);
4468 }
4469 static ssize_t max_luns_store(struct device_driver *ddp, const char *buf,
4470 size_t count)
4471 {
4472 int n;
4473 bool changed;
4474
4475 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
4476 changed = (scsi_debug_max_luns != n);
4477 scsi_debug_max_luns = n;
4478 sdebug_max_tgts_luns();
4479 if (changed && (scsi_debug_scsi_level >= 5)) { /* >= SPC-3 */
4480 struct sdebug_host_info *sdhp;
4481 struct sdebug_dev_info *dp;
4482
4483 spin_lock(&sdebug_host_list_lock);
4484 list_for_each_entry(sdhp, &sdebug_host_list,
4485 host_list) {
4486 list_for_each_entry(dp, &sdhp->dev_info_list,
4487 dev_list) {
4488 set_bit(SDEBUG_UA_LUNS_CHANGED,
4489 dp->uas_bm);
4490 }
4491 }
4492 spin_unlock(&sdebug_host_list_lock);
4493 }
4494 return count;
4495 }
4496 return -EINVAL;
4497 }
4498 static DRIVER_ATTR_RW(max_luns);
4499
4500 static ssize_t max_queue_show(struct device_driver *ddp, char *buf)
4501 {
4502 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_max_queue);
4503 }
4504 /* N.B. max_queue can be changed while there are queued commands. In flight
4505 * commands beyond the new max_queue will be completed. */
4506 static ssize_t max_queue_store(struct device_driver *ddp, const char *buf,
4507 size_t count)
4508 {
4509 unsigned long iflags;
4510 int n, k;
4511
4512 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n > 0) &&
4513 (n <= SCSI_DEBUG_CANQUEUE)) {
4514 spin_lock_irqsave(&queued_arr_lock, iflags);
4515 k = find_last_bit(queued_in_use_bm, SCSI_DEBUG_CANQUEUE);
4516 scsi_debug_max_queue = n;
4517 if (SCSI_DEBUG_CANQUEUE == k)
4518 atomic_set(&retired_max_queue, 0);
4519 else if (k >= n)
4520 atomic_set(&retired_max_queue, k + 1);
4521 else
4522 atomic_set(&retired_max_queue, 0);
4523 spin_unlock_irqrestore(&queued_arr_lock, iflags);
4524 return count;
4525 }
4526 return -EINVAL;
4527 }
4528 static DRIVER_ATTR_RW(max_queue);
4529
4530 static ssize_t no_uld_show(struct device_driver *ddp, char *buf)
4531 {
4532 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_no_uld);
4533 }
4534 static DRIVER_ATTR_RO(no_uld);
4535
4536 static ssize_t scsi_level_show(struct device_driver *ddp, char *buf)
4537 {
4538 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_scsi_level);
4539 }
4540 static DRIVER_ATTR_RO(scsi_level);
4541
4542 static ssize_t virtual_gb_show(struct device_driver *ddp, char *buf)
4543 {
4544 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_virtual_gb);
4545 }
4546 static ssize_t virtual_gb_store(struct device_driver *ddp, const char *buf,
4547 size_t count)
4548 {
4549 int n;
4550 bool changed;
4551
4552 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
4553 changed = (scsi_debug_virtual_gb != n);
4554 scsi_debug_virtual_gb = n;
4555 sdebug_capacity = get_sdebug_capacity();
4556 if (changed) {
4557 struct sdebug_host_info *sdhp;
4558 struct sdebug_dev_info *dp;
4559
4560 spin_lock(&sdebug_host_list_lock);
4561 list_for_each_entry(sdhp, &sdebug_host_list,
4562 host_list) {
4563 list_for_each_entry(dp, &sdhp->dev_info_list,
4564 dev_list) {
4565 set_bit(SDEBUG_UA_CAPACITY_CHANGED,
4566 dp->uas_bm);
4567 }
4568 }
4569 spin_unlock(&sdebug_host_list_lock);
4570 }
4571 return count;
4572 }
4573 return -EINVAL;
4574 }
4575 static DRIVER_ATTR_RW(virtual_gb);
4576
4577 static ssize_t add_host_show(struct device_driver *ddp, char *buf)
4578 {
4579 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_add_host);
4580 }
4581
4582 static ssize_t add_host_store(struct device_driver *ddp, const char *buf,
4583 size_t count)
4584 {
4585 int delta_hosts;
4586
4587 if (sscanf(buf, "%d", &delta_hosts) != 1)
4588 return -EINVAL;
4589 if (delta_hosts > 0) {
4590 do {
4591 sdebug_add_adapter();
4592 } while (--delta_hosts);
4593 } else if (delta_hosts < 0) {
4594 do {
4595 sdebug_remove_adapter();
4596 } while (++delta_hosts);
4597 }
4598 return count;
4599 }
4600 static DRIVER_ATTR_RW(add_host);
4601
4602 static ssize_t vpd_use_hostno_show(struct device_driver *ddp, char *buf)
4603 {
4604 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_vpd_use_hostno);
4605 }
4606 static ssize_t vpd_use_hostno_store(struct device_driver *ddp, const char *buf,
4607 size_t count)
4608 {
4609 int n;
4610
4611 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
4612 scsi_debug_vpd_use_hostno = n;
4613 return count;
4614 }
4615 return -EINVAL;
4616 }
4617 static DRIVER_ATTR_RW(vpd_use_hostno);
4618
4619 static ssize_t sector_size_show(struct device_driver *ddp, char *buf)
4620 {
4621 return scnprintf(buf, PAGE_SIZE, "%u\n", scsi_debug_sector_size);
4622 }
4623 static DRIVER_ATTR_RO(sector_size);
4624
4625 static ssize_t dix_show(struct device_driver *ddp, char *buf)
4626 {
4627 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dix);
4628 }
4629 static DRIVER_ATTR_RO(dix);
4630
4631 static ssize_t dif_show(struct device_driver *ddp, char *buf)
4632 {
4633 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_dif);
4634 }
4635 static DRIVER_ATTR_RO(dif);
4636
4637 static ssize_t guard_show(struct device_driver *ddp, char *buf)
4638 {
4639 return scnprintf(buf, PAGE_SIZE, "%u\n", scsi_debug_guard);
4640 }
4641 static DRIVER_ATTR_RO(guard);
4642
4643 static ssize_t ato_show(struct device_driver *ddp, char *buf)
4644 {
4645 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_ato);
4646 }
4647 static DRIVER_ATTR_RO(ato);
4648
4649 static ssize_t map_show(struct device_driver *ddp, char *buf)
4650 {
4651 ssize_t count;
4652
4653 if (!scsi_debug_lbp())
4654 return scnprintf(buf, PAGE_SIZE, "0-%u\n",
4655 sdebug_store_sectors);
4656
4657 count = scnprintf(buf, PAGE_SIZE - 1, "%*pbl",
4658 (int)map_size, map_storep);
4659 buf[count++] = '\n';
4660 buf[count] = '\0';
4661
4662 return count;
4663 }
4664 static DRIVER_ATTR_RO(map);
4665
4666 static ssize_t removable_show(struct device_driver *ddp, char *buf)
4667 {
4668 return scnprintf(buf, PAGE_SIZE, "%d\n", scsi_debug_removable ? 1 : 0);
4669 }
4670 static ssize_t removable_store(struct device_driver *ddp, const char *buf,
4671 size_t count)
4672 {
4673 int n;
4674
4675 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
4676 scsi_debug_removable = (n > 0);
4677 return count;
4678 }
4679 return -EINVAL;
4680 }
4681 static DRIVER_ATTR_RW(removable);
4682
4683 static ssize_t host_lock_show(struct device_driver *ddp, char *buf)
4684 {
4685 return scnprintf(buf, PAGE_SIZE, "%d\n", !!scsi_debug_host_lock);
4686 }
4687 /* Returns -EBUSY if host_lock is being changed and commands are queued */
4688 static ssize_t host_lock_store(struct device_driver *ddp, const char *buf,
4689 size_t count)
4690 {
4691 int n, res;
4692
4693 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
4694 bool new_host_lock = (n > 0);
4695
4696 res = count;
4697 if (new_host_lock != scsi_debug_host_lock) {
4698 unsigned long iflags;
4699 int k;
4700
4701 spin_lock_irqsave(&queued_arr_lock, iflags);
4702 k = find_first_bit(queued_in_use_bm,
4703 scsi_debug_max_queue);
4704 if (k != scsi_debug_max_queue)
4705 res = -EBUSY; /* have queued commands */
4706 else
4707 scsi_debug_host_lock = new_host_lock;
4708 spin_unlock_irqrestore(&queued_arr_lock, iflags);
4709 }
4710 return res;
4711 }
4712 return -EINVAL;
4713 }
4714 static DRIVER_ATTR_RW(host_lock);
4715
4716 static ssize_t strict_show(struct device_driver *ddp, char *buf)
4717 {
4718 return scnprintf(buf, PAGE_SIZE, "%d\n", !!scsi_debug_strict);
4719 }
4720 static ssize_t strict_store(struct device_driver *ddp, const char *buf,
4721 size_t count)
4722 {
4723 int n;
4724
4725 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
4726 scsi_debug_strict = (n > 0);
4727 return count;
4728 }
4729 return -EINVAL;
4730 }
4731 static DRIVER_ATTR_RW(strict);
4732
4733
4734 /* Note: The following array creates attribute files in the
4735 /sys/bus/pseudo/drivers/scsi_debug directory. The advantage of these
4736 files (over those found in the /sys/module/scsi_debug/parameters
4737 directory) is that auxiliary actions can be triggered when an attribute
4738 is changed. For example see: sdebug_add_host_store() above.
4739 */
4740
4741 static struct attribute *sdebug_drv_attrs[] = {
4742 &driver_attr_delay.attr,
4743 &driver_attr_opts.attr,
4744 &driver_attr_ptype.attr,
4745 &driver_attr_dsense.attr,
4746 &driver_attr_fake_rw.attr,
4747 &driver_attr_no_lun_0.attr,
4748 &driver_attr_num_tgts.attr,
4749 &driver_attr_dev_size_mb.attr,
4750 &driver_attr_num_parts.attr,
4751 &driver_attr_every_nth.attr,
4752 &driver_attr_max_luns.attr,
4753 &driver_attr_max_queue.attr,
4754 &driver_attr_no_uld.attr,
4755 &driver_attr_scsi_level.attr,
4756 &driver_attr_virtual_gb.attr,
4757 &driver_attr_add_host.attr,
4758 &driver_attr_vpd_use_hostno.attr,
4759 &driver_attr_sector_size.attr,
4760 &driver_attr_dix.attr,
4761 &driver_attr_dif.attr,
4762 &driver_attr_guard.attr,
4763 &driver_attr_ato.attr,
4764 &driver_attr_map.attr,
4765 &driver_attr_removable.attr,
4766 &driver_attr_host_lock.attr,
4767 &driver_attr_ndelay.attr,
4768 &driver_attr_strict.attr,
4769 NULL,
4770 };
4771 ATTRIBUTE_GROUPS(sdebug_drv);
4772
4773 static struct device *pseudo_primary;
4774
4775 static int __init scsi_debug_init(void)
4776 {
4777 unsigned long sz;
4778 int host_to_add;
4779 int k;
4780 int ret;
4781
4782 atomic_set(&sdebug_cmnd_count, 0);
4783 atomic_set(&sdebug_completions, 0);
4784 atomic_set(&retired_max_queue, 0);
4785
4786 if (scsi_debug_ndelay >= 1000000000) {
4787 pr_warn("%s: ndelay must be less than 1 second, ignored\n",
4788 __func__);
4789 scsi_debug_ndelay = 0;
4790 } else if (scsi_debug_ndelay > 0)
4791 scsi_debug_delay = DELAY_OVERRIDDEN;
4792
4793 switch (scsi_debug_sector_size) {
4794 case 512:
4795 case 1024:
4796 case 2048:
4797 case 4096:
4798 break;
4799 default:
4800 pr_err("%s: invalid sector_size %d\n", __func__,
4801 scsi_debug_sector_size);
4802 return -EINVAL;
4803 }
4804
4805 switch (scsi_debug_dif) {
4806
4807 case SD_DIF_TYPE0_PROTECTION:
4808 case SD_DIF_TYPE1_PROTECTION:
4809 case SD_DIF_TYPE2_PROTECTION:
4810 case SD_DIF_TYPE3_PROTECTION:
4811 break;
4812
4813 default:
4814 pr_err("%s: dif must be 0, 1, 2 or 3\n", __func__);
4815 return -EINVAL;
4816 }
4817
4818 if (scsi_debug_guard > 1) {
4819 pr_err("%s: guard must be 0 or 1\n", __func__);
4820 return -EINVAL;
4821 }
4822
4823 if (scsi_debug_ato > 1) {
4824 pr_err("%s: ato must be 0 or 1\n", __func__);
4825 return -EINVAL;
4826 }
4827
4828 if (scsi_debug_physblk_exp > 15) {
4829 pr_err("%s: invalid physblk_exp %u\n", __func__,
4830 scsi_debug_physblk_exp);
4831 return -EINVAL;
4832 }
4833
4834 if (scsi_debug_lowest_aligned > 0x3fff) {
4835 pr_err("%s: lowest_aligned too big: %u\n", __func__,
4836 scsi_debug_lowest_aligned);
4837 return -EINVAL;
4838 }
4839
4840 if (scsi_debug_dev_size_mb < 1)
4841 scsi_debug_dev_size_mb = 1; /* force minimum 1 MB ramdisk */
4842 sz = (unsigned long)scsi_debug_dev_size_mb * 1048576;
4843 sdebug_store_sectors = sz / scsi_debug_sector_size;
4844 sdebug_capacity = get_sdebug_capacity();
4845
4846 /* play around with geometry, don't waste too much on track 0 */
4847 sdebug_heads = 8;
4848 sdebug_sectors_per = 32;
4849 if (scsi_debug_dev_size_mb >= 16)
4850 sdebug_heads = 32;
4851 else if (scsi_debug_dev_size_mb >= 256)
4852 sdebug_heads = 64;
4853 sdebug_cylinders_per = (unsigned long)sdebug_capacity /
4854 (sdebug_sectors_per * sdebug_heads);
4855 if (sdebug_cylinders_per >= 1024) {
4856 /* other LLDs do this; implies >= 1GB ram disk ... */
4857 sdebug_heads = 255;
4858 sdebug_sectors_per = 63;
4859 sdebug_cylinders_per = (unsigned long)sdebug_capacity /
4860 (sdebug_sectors_per * sdebug_heads);
4861 }
4862
4863 if (0 == scsi_debug_fake_rw) {
4864 fake_storep = vmalloc(sz);
4865 if (NULL == fake_storep) {
4866 pr_err("%s: out of memory, 1\n", __func__);
4867 return -ENOMEM;
4868 }
4869 memset(fake_storep, 0, sz);
4870 if (scsi_debug_num_parts > 0)
4871 sdebug_build_parts(fake_storep, sz);
4872 }
4873
4874 if (scsi_debug_dix) {
4875 int dif_size;
4876
4877 dif_size = sdebug_store_sectors * sizeof(struct sd_dif_tuple);
4878 dif_storep = vmalloc(dif_size);
4879
4880 pr_err("%s: dif_storep %u bytes @ %p\n", __func__, dif_size,
4881 dif_storep);
4882
4883 if (dif_storep == NULL) {
4884 pr_err("%s: out of mem. (DIX)\n", __func__);
4885 ret = -ENOMEM;
4886 goto free_vm;
4887 }
4888
4889 memset(dif_storep, 0xff, dif_size);
4890 }
4891
4892 /* Logical Block Provisioning */
4893 if (scsi_debug_lbp()) {
4894 scsi_debug_unmap_max_blocks =
4895 clamp(scsi_debug_unmap_max_blocks, 0U, 0xffffffffU);
4896
4897 scsi_debug_unmap_max_desc =
4898 clamp(scsi_debug_unmap_max_desc, 0U, 256U);
4899
4900 scsi_debug_unmap_granularity =
4901 clamp(scsi_debug_unmap_granularity, 1U, 0xffffffffU);
4902
4903 if (scsi_debug_unmap_alignment &&
4904 scsi_debug_unmap_granularity <=
4905 scsi_debug_unmap_alignment) {
4906 pr_err("%s: ERR: unmap_granularity <= unmap_alignment\n",
4907 __func__);
4908 return -EINVAL;
4909 }
4910
4911 map_size = lba_to_map_index(sdebug_store_sectors - 1) + 1;
4912 map_storep = vmalloc(BITS_TO_LONGS(map_size) * sizeof(long));
4913
4914 pr_info("%s: %lu provisioning blocks\n", __func__, map_size);
4915
4916 if (map_storep == NULL) {
4917 pr_err("%s: out of mem. (MAP)\n", __func__);
4918 ret = -ENOMEM;
4919 goto free_vm;
4920 }
4921
4922 bitmap_zero(map_storep, map_size);
4923
4924 /* Map first 1KB for partition table */
4925 if (scsi_debug_num_parts)
4926 map_region(0, 2);
4927 }
4928
4929 pseudo_primary = root_device_register("pseudo_0");
4930 if (IS_ERR(pseudo_primary)) {
4931 pr_warn("%s: root_device_register() error\n", __func__);
4932 ret = PTR_ERR(pseudo_primary);
4933 goto free_vm;
4934 }
4935 ret = bus_register(&pseudo_lld_bus);
4936 if (ret < 0) {
4937 pr_warn("%s: bus_register error: %d\n", __func__, ret);
4938 goto dev_unreg;
4939 }
4940 ret = driver_register(&sdebug_driverfs_driver);
4941 if (ret < 0) {
4942 pr_warn("%s: driver_register error: %d\n", __func__, ret);
4943 goto bus_unreg;
4944 }
4945
4946 host_to_add = scsi_debug_add_host;
4947 scsi_debug_add_host = 0;
4948
4949 for (k = 0; k < host_to_add; k++) {
4950 if (sdebug_add_adapter()) {
4951 pr_err("%s: sdebug_add_adapter failed k=%d\n",
4952 __func__, k);
4953 break;
4954 }
4955 }
4956
4957 if (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts) {
4958 pr_info("%s: built %d host(s)\n", __func__,
4959 scsi_debug_add_host);
4960 }
4961 return 0;
4962
4963 bus_unreg:
4964 bus_unregister(&pseudo_lld_bus);
4965 dev_unreg:
4966 root_device_unregister(pseudo_primary);
4967 free_vm:
4968 if (map_storep)
4969 vfree(map_storep);
4970 if (dif_storep)
4971 vfree(dif_storep);
4972 vfree(fake_storep);
4973
4974 return ret;
4975 }
4976
4977 static void __exit scsi_debug_exit(void)
4978 {
4979 int k = scsi_debug_add_host;
4980
4981 stop_all_queued();
4982 free_all_queued();
4983 for (; k; k--)
4984 sdebug_remove_adapter();
4985 driver_unregister(&sdebug_driverfs_driver);
4986 bus_unregister(&pseudo_lld_bus);
4987 root_device_unregister(pseudo_primary);
4988
4989 if (dif_storep)
4990 vfree(dif_storep);
4991
4992 vfree(fake_storep);
4993 }
4994
4995 device_initcall(scsi_debug_init);
4996 module_exit(scsi_debug_exit);
4997
4998 static void sdebug_release_adapter(struct device * dev)
4999 {
5000 struct sdebug_host_info *sdbg_host;
5001
5002 sdbg_host = to_sdebug_host(dev);
5003 kfree(sdbg_host);
5004 }
5005
5006 static int sdebug_add_adapter(void)
5007 {
5008 int k, devs_per_host;
5009 int error = 0;
5010 struct sdebug_host_info *sdbg_host;
5011 struct sdebug_dev_info *sdbg_devinfo, *tmp;
5012
5013 sdbg_host = kzalloc(sizeof(*sdbg_host),GFP_KERNEL);
5014 if (NULL == sdbg_host) {
5015 printk(KERN_ERR "%s: out of memory at line %d\n",
5016 __func__, __LINE__);
5017 return -ENOMEM;
5018 }
5019
5020 INIT_LIST_HEAD(&sdbg_host->dev_info_list);
5021
5022 devs_per_host = scsi_debug_num_tgts * scsi_debug_max_luns;
5023 for (k = 0; k < devs_per_host; k++) {
5024 sdbg_devinfo = sdebug_device_create(sdbg_host, GFP_KERNEL);
5025 if (!sdbg_devinfo) {
5026 printk(KERN_ERR "%s: out of memory at line %d\n",
5027 __func__, __LINE__);
5028 error = -ENOMEM;
5029 goto clean;
5030 }
5031 }
5032
5033 spin_lock(&sdebug_host_list_lock);
5034 list_add_tail(&sdbg_host->host_list, &sdebug_host_list);
5035 spin_unlock(&sdebug_host_list_lock);
5036
5037 sdbg_host->dev.bus = &pseudo_lld_bus;
5038 sdbg_host->dev.parent = pseudo_primary;
5039 sdbg_host->dev.release = &sdebug_release_adapter;
5040 dev_set_name(&sdbg_host->dev, "adapter%d", scsi_debug_add_host);
5041
5042 error = device_register(&sdbg_host->dev);
5043
5044 if (error)
5045 goto clean;
5046
5047 ++scsi_debug_add_host;
5048 return error;
5049
5050 clean:
5051 list_for_each_entry_safe(sdbg_devinfo, tmp, &sdbg_host->dev_info_list,
5052 dev_list) {
5053 list_del(&sdbg_devinfo->dev_list);
5054 kfree(sdbg_devinfo);
5055 }
5056
5057 kfree(sdbg_host);
5058 return error;
5059 }
5060
5061 static void sdebug_remove_adapter(void)
5062 {
5063 struct sdebug_host_info * sdbg_host = NULL;
5064
5065 spin_lock(&sdebug_host_list_lock);
5066 if (!list_empty(&sdebug_host_list)) {
5067 sdbg_host = list_entry(sdebug_host_list.prev,
5068 struct sdebug_host_info, host_list);
5069 list_del(&sdbg_host->host_list);
5070 }
5071 spin_unlock(&sdebug_host_list_lock);
5072
5073 if (!sdbg_host)
5074 return;
5075
5076 device_unregister(&sdbg_host->dev);
5077 --scsi_debug_add_host;
5078 }
5079
5080 static int
5081 sdebug_change_qdepth(struct scsi_device *sdev, int qdepth)
5082 {
5083 int num_in_q = 0;
5084 unsigned long iflags;
5085 struct sdebug_dev_info *devip;
5086
5087 spin_lock_irqsave(&queued_arr_lock, iflags);
5088 devip = (struct sdebug_dev_info *)sdev->hostdata;
5089 if (NULL == devip) {
5090 spin_unlock_irqrestore(&queued_arr_lock, iflags);
5091 return -ENODEV;
5092 }
5093 num_in_q = atomic_read(&devip->num_in_q);
5094 spin_unlock_irqrestore(&queued_arr_lock, iflags);
5095
5096 if (qdepth < 1)
5097 qdepth = 1;
5098 /* allow to exceed max host queued_arr elements for testing */
5099 if (qdepth > SCSI_DEBUG_CANQUEUE + 10)
5100 qdepth = SCSI_DEBUG_CANQUEUE + 10;
5101 scsi_change_queue_depth(sdev, qdepth);
5102
5103 if (SCSI_DEBUG_OPT_Q_NOISE & scsi_debug_opts) {
5104 sdev_printk(KERN_INFO, sdev,
5105 "%s: qdepth=%d, num_in_q=%d\n",
5106 __func__, qdepth, num_in_q);
5107 }
5108 return sdev->queue_depth;
5109 }
5110
5111 static int
5112 check_inject(struct scsi_cmnd *scp)
5113 {
5114 struct sdebug_scmd_extra_t *ep = scsi_cmd_priv(scp);
5115
5116 memset(ep, 0, sizeof(struct sdebug_scmd_extra_t));
5117
5118 if (atomic_inc_return(&sdebug_cmnd_count) >=
5119 abs(scsi_debug_every_nth)) {
5120 atomic_set(&sdebug_cmnd_count, 0);
5121 if (scsi_debug_every_nth < -1)
5122 scsi_debug_every_nth = -1;
5123 if (SCSI_DEBUG_OPT_TIMEOUT & scsi_debug_opts)
5124 return 1; /* ignore command causing timeout */
5125 else if (SCSI_DEBUG_OPT_MAC_TIMEOUT & scsi_debug_opts &&
5126 scsi_medium_access_command(scp))
5127 return 1; /* time out reads and writes */
5128 if (sdebug_any_injecting_opt) {
5129 int opts = scsi_debug_opts;
5130
5131 if (SCSI_DEBUG_OPT_RECOVERED_ERR & opts)
5132 ep->inj_recovered = true;
5133 else if (SCSI_DEBUG_OPT_TRANSPORT_ERR & opts)
5134 ep->inj_transport = true;
5135 else if (SCSI_DEBUG_OPT_DIF_ERR & opts)
5136 ep->inj_dif = true;
5137 else if (SCSI_DEBUG_OPT_DIX_ERR & opts)
5138 ep->inj_dix = true;
5139 else if (SCSI_DEBUG_OPT_SHORT_TRANSFER & opts)
5140 ep->inj_short = true;
5141 }
5142 }
5143 return 0;
5144 }
5145
5146 static int
5147 scsi_debug_queuecommand(struct scsi_cmnd *scp)
5148 {
5149 u8 sdeb_i;
5150 struct scsi_device *sdp = scp->device;
5151 const struct opcode_info_t *oip;
5152 const struct opcode_info_t *r_oip;
5153 struct sdebug_dev_info *devip;
5154 u8 *cmd = scp->cmnd;
5155 int (*r_pfp)(struct scsi_cmnd *, struct sdebug_dev_info *);
5156 int k, na;
5157 int errsts = 0;
5158 int errsts_no_connect = DID_NO_CONNECT << 16;
5159 u32 flags;
5160 u16 sa;
5161 u8 opcode = cmd[0];
5162 bool has_wlun_rl;
5163 bool debug = !!(SCSI_DEBUG_OPT_NOISE & scsi_debug_opts);
5164
5165 scsi_set_resid(scp, 0);
5166 if (debug && !(SCSI_DEBUG_OPT_NO_CDB_NOISE & scsi_debug_opts)) {
5167 char b[120];
5168 int n, len, sb;
5169
5170 len = scp->cmd_len;
5171 sb = (int)sizeof(b);
5172 if (len > 32)
5173 strcpy(b, "too long, over 32 bytes");
5174 else {
5175 for (k = 0, n = 0; k < len && n < sb; ++k)
5176 n += scnprintf(b + n, sb - n, "%02x ",
5177 (u32)cmd[k]);
5178 }
5179 sdev_printk(KERN_INFO, sdp, "%s: cmd %s\n", my_name, b);
5180 }
5181 has_wlun_rl = (sdp->lun == SAM2_WLUN_REPORT_LUNS);
5182 if ((sdp->lun >= scsi_debug_max_luns) && !has_wlun_rl)
5183 return schedule_resp(scp, NULL, errsts_no_connect, 0);
5184
5185 sdeb_i = opcode_ind_arr[opcode]; /* fully mapped */
5186 oip = &opcode_info_arr[sdeb_i]; /* safe if table consistent */
5187 devip = (struct sdebug_dev_info *)sdp->hostdata;
5188 if (!devip) {
5189 devip = devInfoReg(sdp);
5190 if (NULL == devip)
5191 return schedule_resp(scp, NULL, errsts_no_connect, 0);
5192 }
5193 na = oip->num_attached;
5194 r_pfp = oip->pfp;
5195 if (na) { /* multiple commands with this opcode */
5196 r_oip = oip;
5197 if (FF_SA & r_oip->flags) {
5198 if (F_SA_LOW & oip->flags)
5199 sa = 0x1f & cmd[1];
5200 else
5201 sa = get_unaligned_be16(cmd + 8);
5202 for (k = 0; k <= na; oip = r_oip->arrp + k++) {
5203 if (opcode == oip->opcode && sa == oip->sa)
5204 break;
5205 }
5206 } else { /* since no service action only check opcode */
5207 for (k = 0; k <= na; oip = r_oip->arrp + k++) {
5208 if (opcode == oip->opcode)
5209 break;
5210 }
5211 }
5212 if (k > na) {
5213 if (F_SA_LOW & r_oip->flags)
5214 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 4);
5215 else if (F_SA_HIGH & r_oip->flags)
5216 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 8, 7);
5217 else
5218 mk_sense_invalid_opcode(scp);
5219 goto check_cond;
5220 }
5221 } /* else (when na==0) we assume the oip is a match */
5222 flags = oip->flags;
5223 if (F_INV_OP & flags) {
5224 mk_sense_invalid_opcode(scp);
5225 goto check_cond;
5226 }
5227 if (has_wlun_rl && !(F_RL_WLUN_OK & flags)) {
5228 if (debug)
5229 sdev_printk(KERN_INFO, sdp, "scsi_debug: Opcode: "
5230 "0x%x not supported for wlun\n", opcode);
5231 mk_sense_invalid_opcode(scp);
5232 goto check_cond;
5233 }
5234 if (scsi_debug_strict) { /* check cdb against mask */
5235 u8 rem;
5236 int j;
5237
5238 for (k = 1; k < oip->len_mask[0] && k < 16; ++k) {
5239 rem = ~oip->len_mask[k] & cmd[k];
5240 if (rem) {
5241 for (j = 7; j >= 0; --j, rem <<= 1) {
5242 if (0x80 & rem)
5243 break;
5244 }
5245 mk_sense_invalid_fld(scp, SDEB_IN_CDB, k, j);
5246 goto check_cond;
5247 }
5248 }
5249 }
5250 if (!(F_SKIP_UA & flags) &&
5251 SDEBUG_NUM_UAS != find_first_bit(devip->uas_bm, SDEBUG_NUM_UAS)) {
5252 errsts = check_readiness(scp, UAS_ONLY, devip);
5253 if (errsts)
5254 goto check_cond;
5255 }
5256 if ((F_M_ACCESS & flags) && devip->stopped) {
5257 mk_sense_buffer(scp, NOT_READY, LOGICAL_UNIT_NOT_READY, 0x2);
5258 if (debug)
5259 sdev_printk(KERN_INFO, sdp, "%s reports: Not ready: "
5260 "%s\n", my_name, "initializing command "
5261 "required");
5262 errsts = check_condition_result;
5263 goto fini;
5264 }
5265 if (scsi_debug_fake_rw && (F_FAKE_RW & flags))
5266 goto fini;
5267 if (scsi_debug_every_nth) {
5268 if (check_inject(scp))
5269 return 0; /* ignore command: make trouble */
5270 }
5271 if (oip->pfp) /* if this command has a resp_* function, call it */
5272 errsts = oip->pfp(scp, devip);
5273 else if (r_pfp) /* if leaf function ptr NULL, try the root's */
5274 errsts = r_pfp(scp, devip);
5275
5276 fini:
5277 return schedule_resp(scp, devip, errsts,
5278 ((F_DELAY_OVERR & flags) ? 0 : scsi_debug_delay));
5279 check_cond:
5280 return schedule_resp(scp, devip, check_condition_result, 0);
5281 }
5282
5283 static int
5284 sdebug_queuecommand_lock_or_not(struct Scsi_Host *shost, struct scsi_cmnd *cmd)
5285 {
5286 if (scsi_debug_host_lock) {
5287 unsigned long iflags;
5288 int rc;
5289
5290 spin_lock_irqsave(shost->host_lock, iflags);
5291 rc = scsi_debug_queuecommand(cmd);
5292 spin_unlock_irqrestore(shost->host_lock, iflags);
5293 return rc;
5294 } else
5295 return scsi_debug_queuecommand(cmd);
5296 }
5297
5298 static struct scsi_host_template sdebug_driver_template = {
5299 .show_info = scsi_debug_show_info,
5300 .write_info = scsi_debug_write_info,
5301 .proc_name = sdebug_proc_name,
5302 .name = "SCSI DEBUG",
5303 .info = scsi_debug_info,
5304 .slave_alloc = scsi_debug_slave_alloc,
5305 .slave_configure = scsi_debug_slave_configure,
5306 .slave_destroy = scsi_debug_slave_destroy,
5307 .ioctl = scsi_debug_ioctl,
5308 .queuecommand = sdebug_queuecommand_lock_or_not,
5309 .change_queue_depth = sdebug_change_qdepth,
5310 .eh_abort_handler = scsi_debug_abort,
5311 .eh_device_reset_handler = scsi_debug_device_reset,
5312 .eh_target_reset_handler = scsi_debug_target_reset,
5313 .eh_bus_reset_handler = scsi_debug_bus_reset,
5314 .eh_host_reset_handler = scsi_debug_host_reset,
5315 .can_queue = SCSI_DEBUG_CANQUEUE,
5316 .this_id = 7,
5317 .sg_tablesize = SCSI_MAX_SG_CHAIN_SEGMENTS,
5318 .cmd_per_lun = DEF_CMD_PER_LUN,
5319 .max_sectors = -1U,
5320 .use_clustering = DISABLE_CLUSTERING,
5321 .module = THIS_MODULE,
5322 .track_queue_depth = 1,
5323 .cmd_size = sizeof(struct sdebug_scmd_extra_t),
5324 };
5325
5326 static int sdebug_driver_probe(struct device * dev)
5327 {
5328 int error = 0;
5329 int opts;
5330 struct sdebug_host_info *sdbg_host;
5331 struct Scsi_Host *hpnt;
5332 int host_prot;
5333
5334 sdbg_host = to_sdebug_host(dev);
5335
5336 sdebug_driver_template.can_queue = scsi_debug_max_queue;
5337 if (scsi_debug_clustering)
5338 sdebug_driver_template.use_clustering = ENABLE_CLUSTERING;
5339 hpnt = scsi_host_alloc(&sdebug_driver_template, sizeof(sdbg_host));
5340 if (NULL == hpnt) {
5341 pr_err("%s: scsi_host_alloc failed\n", __func__);
5342 error = -ENODEV;
5343 return error;
5344 }
5345
5346 sdbg_host->shost = hpnt;
5347 *((struct sdebug_host_info **)hpnt->hostdata) = sdbg_host;
5348 if ((hpnt->this_id >= 0) && (scsi_debug_num_tgts > hpnt->this_id))
5349 hpnt->max_id = scsi_debug_num_tgts + 1;
5350 else
5351 hpnt->max_id = scsi_debug_num_tgts;
5352 hpnt->max_lun = SAM2_WLUN_REPORT_LUNS; /* = scsi_debug_max_luns; */
5353
5354 host_prot = 0;
5355
5356 switch (scsi_debug_dif) {
5357
5358 case SD_DIF_TYPE1_PROTECTION:
5359 host_prot = SHOST_DIF_TYPE1_PROTECTION;
5360 if (scsi_debug_dix)
5361 host_prot |= SHOST_DIX_TYPE1_PROTECTION;
5362 break;
5363
5364 case SD_DIF_TYPE2_PROTECTION:
5365 host_prot = SHOST_DIF_TYPE2_PROTECTION;
5366 if (scsi_debug_dix)
5367 host_prot |= SHOST_DIX_TYPE2_PROTECTION;
5368 break;
5369
5370 case SD_DIF_TYPE3_PROTECTION:
5371 host_prot = SHOST_DIF_TYPE3_PROTECTION;
5372 if (scsi_debug_dix)
5373 host_prot |= SHOST_DIX_TYPE3_PROTECTION;
5374 break;
5375
5376 default:
5377 if (scsi_debug_dix)
5378 host_prot |= SHOST_DIX_TYPE0_PROTECTION;
5379 break;
5380 }
5381
5382 scsi_host_set_prot(hpnt, host_prot);
5383
5384 printk(KERN_INFO "scsi_debug: host protection%s%s%s%s%s%s%s\n",
5385 (host_prot & SHOST_DIF_TYPE1_PROTECTION) ? " DIF1" : "",
5386 (host_prot & SHOST_DIF_TYPE2_PROTECTION) ? " DIF2" : "",
5387 (host_prot & SHOST_DIF_TYPE3_PROTECTION) ? " DIF3" : "",
5388 (host_prot & SHOST_DIX_TYPE0_PROTECTION) ? " DIX0" : "",
5389 (host_prot & SHOST_DIX_TYPE1_PROTECTION) ? " DIX1" : "",
5390 (host_prot & SHOST_DIX_TYPE2_PROTECTION) ? " DIX2" : "",
5391 (host_prot & SHOST_DIX_TYPE3_PROTECTION) ? " DIX3" : "");
5392
5393 if (scsi_debug_guard == 1)
5394 scsi_host_set_guard(hpnt, SHOST_DIX_GUARD_IP);
5395 else
5396 scsi_host_set_guard(hpnt, SHOST_DIX_GUARD_CRC);
5397
5398 opts = scsi_debug_opts;
5399 if (SCSI_DEBUG_OPT_RECOVERED_ERR & opts)
5400 sdebug_any_injecting_opt = true;
5401 else if (SCSI_DEBUG_OPT_TRANSPORT_ERR & opts)
5402 sdebug_any_injecting_opt = true;
5403 else if (SCSI_DEBUG_OPT_DIF_ERR & opts)
5404 sdebug_any_injecting_opt = true;
5405 else if (SCSI_DEBUG_OPT_DIX_ERR & opts)
5406 sdebug_any_injecting_opt = true;
5407 else if (SCSI_DEBUG_OPT_SHORT_TRANSFER & opts)
5408 sdebug_any_injecting_opt = true;
5409
5410 error = scsi_add_host(hpnt, &sdbg_host->dev);
5411 if (error) {
5412 printk(KERN_ERR "%s: scsi_add_host failed\n", __func__);
5413 error = -ENODEV;
5414 scsi_host_put(hpnt);
5415 } else
5416 scsi_scan_host(hpnt);
5417
5418 return error;
5419 }
5420
5421 static int sdebug_driver_remove(struct device * dev)
5422 {
5423 struct sdebug_host_info *sdbg_host;
5424 struct sdebug_dev_info *sdbg_devinfo, *tmp;
5425
5426 sdbg_host = to_sdebug_host(dev);
5427
5428 if (!sdbg_host) {
5429 printk(KERN_ERR "%s: Unable to locate host info\n",
5430 __func__);
5431 return -ENODEV;
5432 }
5433
5434 scsi_remove_host(sdbg_host->shost);
5435
5436 list_for_each_entry_safe(sdbg_devinfo, tmp, &sdbg_host->dev_info_list,
5437 dev_list) {
5438 list_del(&sdbg_devinfo->dev_list);
5439 kfree(sdbg_devinfo);
5440 }
5441
5442 scsi_host_put(sdbg_host->shost);
5443 return 0;
5444 }
5445
5446 static int pseudo_lld_bus_match(struct device *dev,
5447 struct device_driver *dev_driver)
5448 {
5449 return 1;
5450 }
5451
5452 static struct bus_type pseudo_lld_bus = {
5453 .name = "pseudo",
5454 .match = pseudo_lld_bus_match,
5455 .probe = sdebug_driver_probe,
5456 .remove = sdebug_driver_remove,
5457 .drv_groups = sdebug_drv_groups,
5458 };
Linux kernel - Deliverables
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