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1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * vvvvvvvvvvvvvvvvvvvvvvv Original vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv
4 * Copyright (C) 1992 Eric Youngdale
5 * Simulate a host adapter with 2 disks attached. Do a lot of checking
6 * to make sure that we are not getting blocks mixed up, and PANIC if
7 * anything out of the ordinary is seen.
8 * ^^^^^^^^^^^^^^^^^^^^^^^ Original ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
9 *
10 * Copyright (C) 2001 - 2020 Douglas Gilbert
11 *
12 * For documentation see http://sg.danny.cz/sg/scsi_debug.html
13 */
14
15
16 #define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__
17
18 #include <linux/module.h>
19
20 #include <linux/kernel.h>
21 #include <linux/errno.h>
22 #include <linux/jiffies.h>
23 #include <linux/slab.h>
24 #include <linux/types.h>
25 #include <linux/string.h>
26 #include <linux/genhd.h>
27 #include <linux/fs.h>
28 #include <linux/init.h>
29 #include <linux/proc_fs.h>
30 #include <linux/vmalloc.h>
31 #include <linux/moduleparam.h>
32 #include <linux/scatterlist.h>
33 #include <linux/blkdev.h>
34 #include <linux/crc-t10dif.h>
35 #include <linux/spinlock.h>
36 #include <linux/interrupt.h>
37 #include <linux/atomic.h>
38 #include <linux/hrtimer.h>
39 #include <linux/uuid.h>
40 #include <linux/t10-pi.h>
41 #include <linux/msdos_partition.h>
42 #include <linux/random.h>
43 #include <linux/xarray.h>
44 #include <linux/prefetch.h>
45
46 #include <net/checksum.h>
47
48 #include <asm/unaligned.h>
49
50 #include <scsi/scsi.h>
51 #include <scsi/scsi_cmnd.h>
52 #include <scsi/scsi_device.h>
53 #include <scsi/scsi_host.h>
54 #include <scsi/scsicam.h>
55 #include <scsi/scsi_eh.h>
56 #include <scsi/scsi_tcq.h>
57 #include <scsi/scsi_dbg.h>
58
59 #include "sd.h"
60 #include "scsi_logging.h"
61
62 /* make sure inq_product_rev string corresponds to this version */
63 #define SDEBUG_VERSION "0190" /* format to fit INQUIRY revision field */
64 static const char *sdebug_version_date = "20200710";
65
66 #define MY_NAME "scsi_debug"
67
68 /* Additional Sense Code (ASC) */
69 #define NO_ADDITIONAL_SENSE 0x0
70 #define LOGICAL_UNIT_NOT_READY 0x4
71 #define LOGICAL_UNIT_COMMUNICATION_FAILURE 0x8
72 #define UNRECOVERED_READ_ERR 0x11
73 #define PARAMETER_LIST_LENGTH_ERR 0x1a
74 #define INVALID_OPCODE 0x20
75 #define LBA_OUT_OF_RANGE 0x21
76 #define INVALID_FIELD_IN_CDB 0x24
77 #define INVALID_FIELD_IN_PARAM_LIST 0x26
78 #define WRITE_PROTECTED 0x27
79 #define UA_RESET_ASC 0x29
80 #define UA_CHANGED_ASC 0x2a
81 #define TARGET_CHANGED_ASC 0x3f
82 #define LUNS_CHANGED_ASCQ 0x0e
83 #define INSUFF_RES_ASC 0x55
84 #define INSUFF_RES_ASCQ 0x3
85 #define POWER_ON_RESET_ASCQ 0x0
86 #define BUS_RESET_ASCQ 0x2 /* scsi bus reset occurred */
87 #define MODE_CHANGED_ASCQ 0x1 /* mode parameters changed */
88 #define CAPACITY_CHANGED_ASCQ 0x9
89 #define SAVING_PARAMS_UNSUP 0x39
90 #define TRANSPORT_PROBLEM 0x4b
91 #define THRESHOLD_EXCEEDED 0x5d
92 #define LOW_POWER_COND_ON 0x5e
93 #define MISCOMPARE_VERIFY_ASC 0x1d
94 #define MICROCODE_CHANGED_ASCQ 0x1 /* with TARGET_CHANGED_ASC */
95 #define MICROCODE_CHANGED_WO_RESET_ASCQ 0x16
96 #define WRITE_ERROR_ASC 0xc
97 #define UNALIGNED_WRITE_ASCQ 0x4
98 #define WRITE_BOUNDARY_ASCQ 0x5
99 #define READ_INVDATA_ASCQ 0x6
100 #define READ_BOUNDARY_ASCQ 0x7
101 #define INSUFF_ZONE_ASCQ 0xe
102
103 /* Additional Sense Code Qualifier (ASCQ) */
104 #define ACK_NAK_TO 0x3
105
106 /* Default values for driver parameters */
107 #define DEF_NUM_HOST 1
108 #define DEF_NUM_TGTS 1
109 #define DEF_MAX_LUNS 1
110 /* With these defaults, this driver will make 1 host with 1 target
111 * (id 0) containing 1 logical unit (lun 0). That is 1 device.
112 */
113 #define DEF_ATO 1
114 #define DEF_CDB_LEN 10
115 #define DEF_JDELAY 1 /* if > 0 unit is a jiffy */
116 #define DEF_DEV_SIZE_PRE_INIT 0
117 #define DEF_DEV_SIZE_MB 8
118 #define DEF_ZBC_DEV_SIZE_MB 128
119 #define DEF_DIF 0
120 #define DEF_DIX 0
121 #define DEF_PER_HOST_STORE false
122 #define DEF_D_SENSE 0
123 #define DEF_EVERY_NTH 0
124 #define DEF_FAKE_RW 0
125 #define DEF_GUARD 0
126 #define DEF_HOST_LOCK 0
127 #define DEF_LBPU 0
128 #define DEF_LBPWS 0
129 #define DEF_LBPWS10 0
130 #define DEF_LBPRZ 1
131 #define DEF_LOWEST_ALIGNED 0
132 #define DEF_NDELAY 0 /* if > 0 unit is a nanosecond */
133 #define DEF_NO_LUN_0 0
134 #define DEF_NUM_PARTS 0
135 #define DEF_OPTS 0
136 #define DEF_OPT_BLKS 1024
137 #define DEF_PHYSBLK_EXP 0
138 #define DEF_OPT_XFERLEN_EXP 0
139 #define DEF_PTYPE TYPE_DISK
140 #define DEF_RANDOM false
141 #define DEF_REMOVABLE false
142 #define DEF_SCSI_LEVEL 7 /* INQUIRY, byte2 [6->SPC-4; 7->SPC-5] */
143 #define DEF_SECTOR_SIZE 512
144 #define DEF_UNMAP_ALIGNMENT 0
145 #define DEF_UNMAP_GRANULARITY 1
146 #define DEF_UNMAP_MAX_BLOCKS 0xFFFFFFFF
147 #define DEF_UNMAP_MAX_DESC 256
148 #define DEF_VIRTUAL_GB 0
149 #define DEF_VPD_USE_HOSTNO 1
150 #define DEF_WRITESAME_LENGTH 0xFFFF
151 #define DEF_STRICT 0
152 #define DEF_STATISTICS false
153 #define DEF_SUBMIT_QUEUES 1
154 #define DEF_TUR_MS_TO_READY 0
155 #define DEF_UUID_CTL 0
156 #define JDELAY_OVERRIDDEN -9999
157
158 /* Default parameters for ZBC drives */
159 #define DEF_ZBC_ZONE_SIZE_MB 128
160 #define DEF_ZBC_MAX_OPEN_ZONES 8
161 #define DEF_ZBC_NR_CONV_ZONES 1
162
163 #define SDEBUG_LUN_0_VAL 0
164
165 /* bit mask values for sdebug_opts */
166 #define SDEBUG_OPT_NOISE 1
167 #define SDEBUG_OPT_MEDIUM_ERR 2
168 #define SDEBUG_OPT_TIMEOUT 4
169 #define SDEBUG_OPT_RECOVERED_ERR 8
170 #define SDEBUG_OPT_TRANSPORT_ERR 16
171 #define SDEBUG_OPT_DIF_ERR 32
172 #define SDEBUG_OPT_DIX_ERR 64
173 #define SDEBUG_OPT_MAC_TIMEOUT 128
174 #define SDEBUG_OPT_SHORT_TRANSFER 0x100
175 #define SDEBUG_OPT_Q_NOISE 0x200
176 #define SDEBUG_OPT_ALL_TSF 0x400
177 #define SDEBUG_OPT_RARE_TSF 0x800
178 #define SDEBUG_OPT_N_WCE 0x1000
179 #define SDEBUG_OPT_RESET_NOISE 0x2000
180 #define SDEBUG_OPT_NO_CDB_NOISE 0x4000
181 #define SDEBUG_OPT_HOST_BUSY 0x8000
182 #define SDEBUG_OPT_CMD_ABORT 0x10000
183 #define SDEBUG_OPT_ALL_NOISE (SDEBUG_OPT_NOISE | SDEBUG_OPT_Q_NOISE | \
184 SDEBUG_OPT_RESET_NOISE)
185 #define SDEBUG_OPT_ALL_INJECTING (SDEBUG_OPT_RECOVERED_ERR | \
186 SDEBUG_OPT_TRANSPORT_ERR | \
187 SDEBUG_OPT_DIF_ERR | SDEBUG_OPT_DIX_ERR | \
188 SDEBUG_OPT_SHORT_TRANSFER | \
189 SDEBUG_OPT_HOST_BUSY | \
190 SDEBUG_OPT_CMD_ABORT)
191 #define SDEBUG_OPT_RECOV_DIF_DIX (SDEBUG_OPT_RECOVERED_ERR | \
192 SDEBUG_OPT_DIF_ERR | SDEBUG_OPT_DIX_ERR)
193
194 /* As indicated in SAM-5 and SPC-4 Unit Attentions (UAs) are returned in
195 * priority order. In the subset implemented here lower numbers have higher
196 * priority. The UA numbers should be a sequence starting from 0 with
197 * SDEBUG_NUM_UAS being 1 higher than the highest numbered UA. */
198 #define SDEBUG_UA_POR 0 /* Power on, reset, or bus device reset */
199 #define SDEBUG_UA_BUS_RESET 1
200 #define SDEBUG_UA_MODE_CHANGED 2
201 #define SDEBUG_UA_CAPACITY_CHANGED 3
202 #define SDEBUG_UA_LUNS_CHANGED 4
203 #define SDEBUG_UA_MICROCODE_CHANGED 5 /* simulate firmware change */
204 #define SDEBUG_UA_MICROCODE_CHANGED_WO_RESET 6
205 #define SDEBUG_NUM_UAS 7
206
207 /* when 1==SDEBUG_OPT_MEDIUM_ERR, a medium error is simulated at this
208 * sector on read commands: */
209 #define OPT_MEDIUM_ERR_ADDR 0x1234 /* that's sector 4660 in decimal */
210 #define OPT_MEDIUM_ERR_NUM 10 /* number of consecutive medium errs */
211
212 /* If REPORT LUNS has luns >= 256 it can choose "flat space" (value 1)
213 * or "peripheral device" addressing (value 0) */
214 #define SAM2_LUN_ADDRESS_METHOD 0
215
216 /* SDEBUG_CANQUEUE is the maximum number of commands that can be queued
217 * (for response) per submit queue at one time. Can be reduced by max_queue
218 * option. Command responses are not queued when jdelay=0 and ndelay=0. The
219 * per-device DEF_CMD_PER_LUN can be changed via sysfs:
220 * /sys/class/scsi_device/<h:c:t:l>/device/queue_depth
221 * but cannot exceed SDEBUG_CANQUEUE .
222 */
223 #define SDEBUG_CANQUEUE_WORDS 3 /* a WORD is bits in a long */
224 #define SDEBUG_CANQUEUE (SDEBUG_CANQUEUE_WORDS * BITS_PER_LONG)
225 #define DEF_CMD_PER_LUN 255
226
227 /* UA - Unit Attention; SA - Service Action; SSU - Start Stop Unit */
228 #define F_D_IN 1 /* Data-in command (e.g. READ) */
229 #define F_D_OUT 2 /* Data-out command (e.g. WRITE) */
230 #define F_D_OUT_MAYBE 4 /* WRITE SAME, NDOB bit */
231 #define F_D_UNKN 8
232 #define F_RL_WLUN_OK 0x10 /* allowed with REPORT LUNS W-LUN */
233 #define F_SKIP_UA 0x20 /* bypass UAs (e.g. INQUIRY command) */
234 #define F_DELAY_OVERR 0x40 /* for commands like INQUIRY */
235 #define F_SA_LOW 0x80 /* SA is in cdb byte 1, bits 4 to 0 */
236 #define F_SA_HIGH 0x100 /* SA is in cdb bytes 8 and 9 */
237 #define F_INV_OP 0x200 /* invalid opcode (not supported) */
238 #define F_FAKE_RW 0x400 /* bypass resp_*() when fake_rw set */
239 #define F_M_ACCESS 0x800 /* media access, reacts to SSU state */
240 #define F_SSU_DELAY 0x1000 /* SSU command delay (long-ish) */
241 #define F_SYNC_DELAY 0x2000 /* SYNCHRONIZE CACHE delay */
242
243 /* Useful combinations of the above flags */
244 #define FF_RESPOND (F_RL_WLUN_OK | F_SKIP_UA | F_DELAY_OVERR)
245 #define FF_MEDIA_IO (F_M_ACCESS | F_FAKE_RW)
246 #define FF_SA (F_SA_HIGH | F_SA_LOW)
247 #define F_LONG_DELAY (F_SSU_DELAY | F_SYNC_DELAY)
248
249 #define SDEBUG_MAX_PARTS 4
250
251 #define SDEBUG_MAX_CMD_LEN 32
252
253 #define SDEB_XA_NOT_IN_USE XA_MARK_1
254
255 /* Zone types (zbcr05 table 25) */
256 enum sdebug_z_type {
257 ZBC_ZONE_TYPE_CNV = 0x1,
258 ZBC_ZONE_TYPE_SWR = 0x2,
259 ZBC_ZONE_TYPE_SWP = 0x3,
260 };
261
262 /* enumeration names taken from table 26, zbcr05 */
263 enum sdebug_z_cond {
264 ZBC_NOT_WRITE_POINTER = 0x0,
265 ZC1_EMPTY = 0x1,
266 ZC2_IMPLICIT_OPEN = 0x2,
267 ZC3_EXPLICIT_OPEN = 0x3,
268 ZC4_CLOSED = 0x4,
269 ZC6_READ_ONLY = 0xd,
270 ZC5_FULL = 0xe,
271 ZC7_OFFLINE = 0xf,
272 };
273
274 struct sdeb_zone_state { /* ZBC: per zone state */
275 enum sdebug_z_type z_type;
276 enum sdebug_z_cond z_cond;
277 bool z_non_seq_resource;
278 unsigned int z_size;
279 sector_t z_start;
280 sector_t z_wp;
281 };
282
283 struct sdebug_dev_info {
284 struct list_head dev_list;
285 unsigned int channel;
286 unsigned int target;
287 u64 lun;
288 uuid_t lu_name;
289 struct sdebug_host_info *sdbg_host;
290 unsigned long uas_bm[1];
291 atomic_t num_in_q;
292 atomic_t stopped; /* 1: by SSU, 2: device start */
293 bool used;
294
295 /* For ZBC devices */
296 enum blk_zoned_model zmodel;
297 unsigned int zsize;
298 unsigned int zsize_shift;
299 unsigned int nr_zones;
300 unsigned int nr_conv_zones;
301 unsigned int nr_imp_open;
302 unsigned int nr_exp_open;
303 unsigned int nr_closed;
304 unsigned int max_open;
305 ktime_t create_ts; /* time since bootup that this device was created */
306 struct sdeb_zone_state *zstate;
307 };
308
309 struct sdebug_host_info {
310 struct list_head host_list;
311 int si_idx; /* sdeb_store_info (per host) xarray index */
312 struct Scsi_Host *shost;
313 struct device dev;
314 struct list_head dev_info_list;
315 };
316
317 /* There is an xarray of pointers to this struct's objects, one per host */
318 struct sdeb_store_info {
319 rwlock_t macc_lck; /* for atomic media access on this store */
320 u8 *storep; /* user data storage (ram) */
321 struct t10_pi_tuple *dif_storep; /* protection info */
322 void *map_storep; /* provisioning map */
323 };
324
325 #define to_sdebug_host(d) \
326 container_of(d, struct sdebug_host_info, dev)
327
328 enum sdeb_defer_type {SDEB_DEFER_NONE = 0, SDEB_DEFER_HRT = 1,
329 SDEB_DEFER_WQ = 2};
330
331 struct sdebug_defer {
332 struct hrtimer hrt;
333 struct execute_work ew;
334 int sqa_idx; /* index of sdebug_queue array */
335 int qc_idx; /* index of sdebug_queued_cmd array within sqa_idx */
336 int hc_idx; /* hostwide tag index */
337 int issuing_cpu;
338 bool init_hrt;
339 bool init_wq;
340 bool aborted; /* true when blk_abort_request() already called */
341 enum sdeb_defer_type defer_t;
342 };
343
344 struct sdebug_queued_cmd {
345 /* corresponding bit set in in_use_bm[] in owning struct sdebug_queue
346 * instance indicates this slot is in use.
347 */
348 struct sdebug_defer *sd_dp;
349 struct scsi_cmnd *a_cmnd;
350 };
351
352 struct sdebug_queue {
353 struct sdebug_queued_cmd qc_arr[SDEBUG_CANQUEUE];
354 unsigned long in_use_bm[SDEBUG_CANQUEUE_WORDS];
355 spinlock_t qc_lock;
356 atomic_t blocked; /* to temporarily stop more being queued */
357 };
358
359 static atomic_t sdebug_cmnd_count; /* number of incoming commands */
360 static atomic_t sdebug_completions; /* count of deferred completions */
361 static atomic_t sdebug_miss_cpus; /* submission + completion cpus differ */
362 static atomic_t sdebug_a_tsf; /* 'almost task set full' counter */
363 static atomic_t sdeb_inject_pending;
364
365 struct opcode_info_t {
366 u8 num_attached; /* 0 if this is it (i.e. a leaf); use 0xff */
367 /* for terminating element */
368 u8 opcode; /* if num_attached > 0, preferred */
369 u16 sa; /* service action */
370 u32 flags; /* OR-ed set of SDEB_F_* */
371 int (*pfp)(struct scsi_cmnd *, struct sdebug_dev_info *);
372 const struct opcode_info_t *arrp; /* num_attached elements or NULL */
373 u8 len_mask[16]; /* len_mask[0]-->cdb_len, then mask for cdb */
374 /* 1 to min(cdb_len, 15); ignore cdb[15...] */
375 };
376
377 /* SCSI opcodes (first byte of cdb) of interest mapped onto these indexes */
378 enum sdeb_opcode_index {
379 SDEB_I_INVALID_OPCODE = 0,
380 SDEB_I_INQUIRY = 1,
381 SDEB_I_REPORT_LUNS = 2,
382 SDEB_I_REQUEST_SENSE = 3,
383 SDEB_I_TEST_UNIT_READY = 4,
384 SDEB_I_MODE_SENSE = 5, /* 6, 10 */
385 SDEB_I_MODE_SELECT = 6, /* 6, 10 */
386 SDEB_I_LOG_SENSE = 7,
387 SDEB_I_READ_CAPACITY = 8, /* 10; 16 is in SA_IN(16) */
388 SDEB_I_READ = 9, /* 6, 10, 12, 16 */
389 SDEB_I_WRITE = 10, /* 6, 10, 12, 16 */
390 SDEB_I_START_STOP = 11,
391 SDEB_I_SERV_ACT_IN_16 = 12, /* add ...SERV_ACT_IN_12 if needed */
392 SDEB_I_SERV_ACT_OUT_16 = 13, /* add ...SERV_ACT_OUT_12 if needed */
393 SDEB_I_MAINT_IN = 14,
394 SDEB_I_MAINT_OUT = 15,
395 SDEB_I_VERIFY = 16, /* VERIFY(10), VERIFY(16) */
396 SDEB_I_VARIABLE_LEN = 17, /* READ(32), WRITE(32), WR_SCAT(32) */
397 SDEB_I_RESERVE = 18, /* 6, 10 */
398 SDEB_I_RELEASE = 19, /* 6, 10 */
399 SDEB_I_ALLOW_REMOVAL = 20, /* PREVENT ALLOW MEDIUM REMOVAL */
400 SDEB_I_REZERO_UNIT = 21, /* REWIND in SSC */
401 SDEB_I_ATA_PT = 22, /* 12, 16 */
402 SDEB_I_SEND_DIAG = 23,
403 SDEB_I_UNMAP = 24,
404 SDEB_I_WRITE_BUFFER = 25,
405 SDEB_I_WRITE_SAME = 26, /* 10, 16 */
406 SDEB_I_SYNC_CACHE = 27, /* 10, 16 */
407 SDEB_I_COMP_WRITE = 28,
408 SDEB_I_PRE_FETCH = 29, /* 10, 16 */
409 SDEB_I_ZONE_OUT = 30, /* 0x94+SA; includes no data xfer */
410 SDEB_I_ZONE_IN = 31, /* 0x95+SA; all have data-in */
411 SDEB_I_LAST_ELEM_P1 = 32, /* keep this last (previous + 1) */
412 };
413
414
415 static const unsigned char opcode_ind_arr[256] = {
416 /* 0x0; 0x0->0x1f: 6 byte cdbs */
417 SDEB_I_TEST_UNIT_READY, SDEB_I_REZERO_UNIT, 0, SDEB_I_REQUEST_SENSE,
418 0, 0, 0, 0,
419 SDEB_I_READ, 0, SDEB_I_WRITE, 0, 0, 0, 0, 0,
420 0, 0, SDEB_I_INQUIRY, 0, 0, SDEB_I_MODE_SELECT, SDEB_I_RESERVE,
421 SDEB_I_RELEASE,
422 0, 0, SDEB_I_MODE_SENSE, SDEB_I_START_STOP, 0, SDEB_I_SEND_DIAG,
423 SDEB_I_ALLOW_REMOVAL, 0,
424 /* 0x20; 0x20->0x3f: 10 byte cdbs */
425 0, 0, 0, 0, 0, SDEB_I_READ_CAPACITY, 0, 0,
426 SDEB_I_READ, 0, SDEB_I_WRITE, 0, 0, 0, 0, SDEB_I_VERIFY,
427 0, 0, 0, 0, SDEB_I_PRE_FETCH, SDEB_I_SYNC_CACHE, 0, 0,
428 0, 0, 0, SDEB_I_WRITE_BUFFER, 0, 0, 0, 0,
429 /* 0x40; 0x40->0x5f: 10 byte cdbs */
430 0, SDEB_I_WRITE_SAME, SDEB_I_UNMAP, 0, 0, 0, 0, 0,
431 0, 0, 0, 0, 0, SDEB_I_LOG_SENSE, 0, 0,
432 0, 0, 0, 0, 0, SDEB_I_MODE_SELECT, SDEB_I_RESERVE,
433 SDEB_I_RELEASE,
434 0, 0, SDEB_I_MODE_SENSE, 0, 0, 0, 0, 0,
435 /* 0x60; 0x60->0x7d are reserved, 0x7e is "extended cdb" */
436 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
437 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
438 0, SDEB_I_VARIABLE_LEN,
439 /* 0x80; 0x80->0x9f: 16 byte cdbs */
440 0, 0, 0, 0, 0, SDEB_I_ATA_PT, 0, 0,
441 SDEB_I_READ, SDEB_I_COMP_WRITE, SDEB_I_WRITE, 0,
442 0, 0, 0, SDEB_I_VERIFY,
443 SDEB_I_PRE_FETCH, SDEB_I_SYNC_CACHE, 0, SDEB_I_WRITE_SAME,
444 SDEB_I_ZONE_OUT, SDEB_I_ZONE_IN, 0, 0,
445 0, 0, 0, 0, 0, 0, SDEB_I_SERV_ACT_IN_16, SDEB_I_SERV_ACT_OUT_16,
446 /* 0xa0; 0xa0->0xbf: 12 byte cdbs */
447 SDEB_I_REPORT_LUNS, SDEB_I_ATA_PT, 0, SDEB_I_MAINT_IN,
448 SDEB_I_MAINT_OUT, 0, 0, 0,
449 SDEB_I_READ, 0 /* SDEB_I_SERV_ACT_OUT_12 */, SDEB_I_WRITE,
450 0 /* SDEB_I_SERV_ACT_IN_12 */, 0, 0, 0, 0,
451 0, 0, 0, 0, 0, 0, 0, 0,
452 0, 0, 0, 0, 0, 0, 0, 0,
453 /* 0xc0; 0xc0->0xff: vendor specific */
454 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
455 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
456 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
457 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
458 };
459
460 /*
461 * The following "response" functions return the SCSI mid-level's 4 byte
462 * tuple-in-an-int. To handle commands with an IMMED bit, for a faster
463 * command completion, they can mask their return value with
464 * SDEG_RES_IMMED_MASK .
465 */
466 #define SDEG_RES_IMMED_MASK 0x40000000
467
468 static int resp_inquiry(struct scsi_cmnd *, struct sdebug_dev_info *);
469 static int resp_report_luns(struct scsi_cmnd *, struct sdebug_dev_info *);
470 static int resp_requests(struct scsi_cmnd *, struct sdebug_dev_info *);
471 static int resp_mode_sense(struct scsi_cmnd *, struct sdebug_dev_info *);
472 static int resp_mode_select(struct scsi_cmnd *, struct sdebug_dev_info *);
473 static int resp_log_sense(struct scsi_cmnd *, struct sdebug_dev_info *);
474 static int resp_readcap(struct scsi_cmnd *, struct sdebug_dev_info *);
475 static int resp_read_dt0(struct scsi_cmnd *, struct sdebug_dev_info *);
476 static int resp_write_dt0(struct scsi_cmnd *, struct sdebug_dev_info *);
477 static int resp_write_scat(struct scsi_cmnd *, struct sdebug_dev_info *);
478 static int resp_start_stop(struct scsi_cmnd *, struct sdebug_dev_info *);
479 static int resp_readcap16(struct scsi_cmnd *, struct sdebug_dev_info *);
480 static int resp_get_lba_status(struct scsi_cmnd *, struct sdebug_dev_info *);
481 static int resp_report_tgtpgs(struct scsi_cmnd *, struct sdebug_dev_info *);
482 static int resp_unmap(struct scsi_cmnd *, struct sdebug_dev_info *);
483 static int resp_rsup_opcodes(struct scsi_cmnd *, struct sdebug_dev_info *);
484 static int resp_rsup_tmfs(struct scsi_cmnd *, struct sdebug_dev_info *);
485 static int resp_verify(struct scsi_cmnd *, struct sdebug_dev_info *);
486 static int resp_write_same_10(struct scsi_cmnd *, struct sdebug_dev_info *);
487 static int resp_write_same_16(struct scsi_cmnd *, struct sdebug_dev_info *);
488 static int resp_comp_write(struct scsi_cmnd *, struct sdebug_dev_info *);
489 static int resp_write_buffer(struct scsi_cmnd *, struct sdebug_dev_info *);
490 static int resp_sync_cache(struct scsi_cmnd *, struct sdebug_dev_info *);
491 static int resp_pre_fetch(struct scsi_cmnd *, struct sdebug_dev_info *);
492 static int resp_report_zones(struct scsi_cmnd *, struct sdebug_dev_info *);
493 static int resp_open_zone(struct scsi_cmnd *, struct sdebug_dev_info *);
494 static int resp_close_zone(struct scsi_cmnd *, struct sdebug_dev_info *);
495 static int resp_finish_zone(struct scsi_cmnd *, struct sdebug_dev_info *);
496 static int resp_rwp_zone(struct scsi_cmnd *, struct sdebug_dev_info *);
497
498 static int sdebug_do_add_host(bool mk_new_store);
499 static int sdebug_add_host_helper(int per_host_idx);
500 static void sdebug_do_remove_host(bool the_end);
501 static int sdebug_add_store(void);
502 static void sdebug_erase_store(int idx, struct sdeb_store_info *sip);
503 static void sdebug_erase_all_stores(bool apart_from_first);
504
505 /*
506 * The following are overflow arrays for cdbs that "hit" the same index in
507 * the opcode_info_arr array. The most time sensitive (or commonly used) cdb
508 * should be placed in opcode_info_arr[], the others should be placed here.
509 */
510 static const struct opcode_info_t msense_iarr[] = {
511 {0, 0x1a, 0, F_D_IN, NULL, NULL,
512 {6, 0xe8, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
513 };
514
515 static const struct opcode_info_t mselect_iarr[] = {
516 {0, 0x15, 0, F_D_OUT, NULL, NULL,
517 {6, 0xf1, 0, 0, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
518 };
519
520 static const struct opcode_info_t read_iarr[] = {
521 {0, 0x28, 0, F_D_IN | FF_MEDIA_IO, resp_read_dt0, NULL,/* READ(10) */
522 {10, 0xff, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xff, 0xff, 0xc7, 0, 0,
523 0, 0, 0, 0} },
524 {0, 0x8, 0, F_D_IN | FF_MEDIA_IO, resp_read_dt0, NULL, /* READ(6) */
525 {6, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
526 {0, 0xa8, 0, F_D_IN | FF_MEDIA_IO, resp_read_dt0, NULL,/* READ(12) */
527 {12, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xbf,
528 0xc7, 0, 0, 0, 0} },
529 };
530
531 static const struct opcode_info_t write_iarr[] = {
532 {0, 0x2a, 0, F_D_OUT | FF_MEDIA_IO, resp_write_dt0, /* WRITE(10) */
533 NULL, {10, 0xfb, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xff, 0xff, 0xc7,
534 0, 0, 0, 0, 0, 0} },
535 {0, 0xa, 0, F_D_OUT | FF_MEDIA_IO, resp_write_dt0, /* WRITE(6) */
536 NULL, {6, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0,
537 0, 0, 0} },
538 {0, 0xaa, 0, F_D_OUT | FF_MEDIA_IO, resp_write_dt0, /* WRITE(12) */
539 NULL, {12, 0xfb, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
540 0xbf, 0xc7, 0, 0, 0, 0} },
541 };
542
543 static const struct opcode_info_t verify_iarr[] = {
544 {0, 0x2f, 0, F_D_OUT_MAYBE | FF_MEDIA_IO, resp_verify,/* VERIFY(10) */
545 NULL, {10, 0xf7, 0xff, 0xff, 0xff, 0xff, 0xbf, 0xff, 0xff, 0xc7,
546 0, 0, 0, 0, 0, 0} },
547 };
548
549 static const struct opcode_info_t sa_in_16_iarr[] = {
550 {0, 0x9e, 0x12, F_SA_LOW | F_D_IN, resp_get_lba_status, NULL,
551 {16, 0x12, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
552 0xff, 0xff, 0xff, 0, 0xc7} }, /* GET LBA STATUS(16) */
553 };
554
555 static const struct opcode_info_t vl_iarr[] = { /* VARIABLE LENGTH */
556 {0, 0x7f, 0xb, F_SA_HIGH | F_D_OUT | FF_MEDIA_IO, resp_write_dt0,
557 NULL, {32, 0xc7, 0, 0, 0, 0, 0x3f, 0x18, 0x0, 0xb, 0xfa,
558 0, 0xff, 0xff, 0xff, 0xff} }, /* WRITE(32) */
559 {0, 0x7f, 0x11, F_SA_HIGH | F_D_OUT | FF_MEDIA_IO, resp_write_scat,
560 NULL, {32, 0xc7, 0, 0, 0, 0, 0x3f, 0x18, 0x0, 0x11, 0xf8,
561 0, 0xff, 0xff, 0x0, 0x0} }, /* WRITE SCATTERED(32) */
562 };
563
564 static const struct opcode_info_t maint_in_iarr[] = { /* MAINT IN */
565 {0, 0xa3, 0xc, F_SA_LOW | F_D_IN, resp_rsup_opcodes, NULL,
566 {12, 0xc, 0x87, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0,
567 0xc7, 0, 0, 0, 0} }, /* REPORT SUPPORTED OPERATION CODES */
568 {0, 0xa3, 0xd, F_SA_LOW | F_D_IN, resp_rsup_tmfs, NULL,
569 {12, 0xd, 0x80, 0, 0, 0, 0xff, 0xff, 0xff, 0xff, 0, 0xc7, 0, 0,
570 0, 0} }, /* REPORTED SUPPORTED TASK MANAGEMENT FUNCTIONS */
571 };
572
573 static const struct opcode_info_t write_same_iarr[] = {
574 {0, 0x93, 0, F_D_OUT_MAYBE | FF_MEDIA_IO, resp_write_same_16, NULL,
575 {16, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
576 0xff, 0xff, 0xff, 0x3f, 0xc7} }, /* WRITE SAME(16) */
577 };
578
579 static const struct opcode_info_t reserve_iarr[] = {
580 {0, 0x16, 0, F_D_OUT, NULL, NULL, /* RESERVE(6) */
581 {6, 0x1f, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
582 };
583
584 static const struct opcode_info_t release_iarr[] = {
585 {0, 0x17, 0, F_D_OUT, NULL, NULL, /* RELEASE(6) */
586 {6, 0x1f, 0xff, 0, 0, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
587 };
588
589 static const struct opcode_info_t sync_cache_iarr[] = {
590 {0, 0x91, 0, F_SYNC_DELAY | F_M_ACCESS, resp_sync_cache, NULL,
591 {16, 0x6, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
592 0xff, 0xff, 0xff, 0xff, 0x3f, 0xc7} }, /* SYNC_CACHE (16) */
593 };
594
595 static const struct opcode_info_t pre_fetch_iarr[] = {
596 {0, 0x90, 0, F_SYNC_DELAY | FF_MEDIA_IO, resp_pre_fetch, NULL,
597 {16, 0x2, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
598 0xff, 0xff, 0xff, 0xff, 0x3f, 0xc7} }, /* PRE-FETCH (16) */
599 };
600
601 static const struct opcode_info_t zone_out_iarr[] = { /* ZONE OUT(16) */
602 {0, 0x94, 0x1, F_SA_LOW | F_M_ACCESS, resp_close_zone, NULL,
603 {16, 0x1, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
604 0xff, 0, 0, 0xff, 0xff, 0x1, 0xc7} }, /* CLOSE ZONE */
605 {0, 0x94, 0x2, F_SA_LOW | F_M_ACCESS, resp_finish_zone, NULL,
606 {16, 0x2, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
607 0xff, 0, 0, 0xff, 0xff, 0x1, 0xc7} }, /* FINISH ZONE */
608 {0, 0x94, 0x4, F_SA_LOW | F_M_ACCESS, resp_rwp_zone, NULL,
609 {16, 0x4, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
610 0xff, 0, 0, 0xff, 0xff, 0x1, 0xc7} }, /* RESET WRITE POINTER */
611 };
612
613 static const struct opcode_info_t zone_in_iarr[] = { /* ZONE IN(16) */
614 {0, 0x95, 0x6, F_SA_LOW | F_D_IN | F_M_ACCESS, NULL, NULL,
615 {16, 0x6, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
616 0xff, 0xff, 0xff, 0xff, 0x3f, 0xc7} }, /* REPORT ZONES */
617 };
618
619
620 /* This array is accessed via SDEB_I_* values. Make sure all are mapped,
621 * plus the terminating elements for logic that scans this table such as
622 * REPORT SUPPORTED OPERATION CODES. */
623 static const struct opcode_info_t opcode_info_arr[SDEB_I_LAST_ELEM_P1 + 1] = {
624 /* 0 */
625 {0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL, /* unknown opcodes */
626 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
627 {0, 0x12, 0, FF_RESPOND | F_D_IN, resp_inquiry, NULL, /* INQUIRY */
628 {6, 0xe3, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
629 {0, 0xa0, 0, FF_RESPOND | F_D_IN, resp_report_luns, NULL,
630 {12, 0xe3, 0xff, 0, 0, 0, 0xff, 0xff, 0xff, 0xff, 0, 0xc7, 0, 0,
631 0, 0} }, /* REPORT LUNS */
632 {0, 0x3, 0, FF_RESPOND | F_D_IN, resp_requests, NULL,
633 {6, 0xe1, 0, 0, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
634 {0, 0x0, 0, F_M_ACCESS | F_RL_WLUN_OK, NULL, NULL,/* TEST UNIT READY */
635 {6, 0, 0, 0, 0, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
636 /* 5 */
637 {ARRAY_SIZE(msense_iarr), 0x5a, 0, F_D_IN, /* MODE SENSE(10) */
638 resp_mode_sense, msense_iarr, {10, 0xf8, 0xff, 0xff, 0, 0, 0,
639 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0} },
640 {ARRAY_SIZE(mselect_iarr), 0x55, 0, F_D_OUT, /* MODE SELECT(10) */
641 resp_mode_select, mselect_iarr, {10, 0xf1, 0, 0, 0, 0, 0, 0xff,
642 0xff, 0xc7, 0, 0, 0, 0, 0, 0} },
643 {0, 0x4d, 0, F_D_IN, resp_log_sense, NULL, /* LOG SENSE */
644 {10, 0xe3, 0xff, 0xff, 0, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0,
645 0, 0, 0} },
646 {0, 0x25, 0, F_D_IN, resp_readcap, NULL, /* READ CAPACITY(10) */
647 {10, 0xe1, 0xff, 0xff, 0xff, 0xff, 0, 0, 0x1, 0xc7, 0, 0, 0, 0,
648 0, 0} },
649 {ARRAY_SIZE(read_iarr), 0x88, 0, F_D_IN | FF_MEDIA_IO, /* READ(16) */
650 resp_read_dt0, read_iarr, {16, 0xfe, 0xff, 0xff, 0xff, 0xff,
651 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc7} },
652 /* 10 */
653 {ARRAY_SIZE(write_iarr), 0x8a, 0, F_D_OUT | FF_MEDIA_IO,
654 resp_write_dt0, write_iarr, /* WRITE(16) */
655 {16, 0xfa, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
656 0xff, 0xff, 0xff, 0xff, 0xff, 0xc7} },
657 {0, 0x1b, 0, F_SSU_DELAY, resp_start_stop, NULL,/* START STOP UNIT */
658 {6, 0x1, 0, 0xf, 0xf7, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
659 {ARRAY_SIZE(sa_in_16_iarr), 0x9e, 0x10, F_SA_LOW | F_D_IN,
660 resp_readcap16, sa_in_16_iarr, /* SA_IN(16), READ CAPACITY(16) */
661 {16, 0x10, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
662 0xff, 0xff, 0xff, 0xff, 0x1, 0xc7} },
663 {0, 0x9f, 0x12, F_SA_LOW | F_D_OUT | FF_MEDIA_IO, resp_write_scat,
664 NULL, {16, 0x12, 0xf9, 0x0, 0xff, 0xff, 0, 0, 0xff, 0xff, 0xff,
665 0xff, 0xff, 0xff, 0xff, 0xc7} }, /* SA_OUT(16), WRITE SCAT(16) */
666 {ARRAY_SIZE(maint_in_iarr), 0xa3, 0xa, F_SA_LOW | F_D_IN,
667 resp_report_tgtpgs, /* MAINT IN, REPORT TARGET PORT GROUPS */
668 maint_in_iarr, {12, 0xea, 0, 0, 0, 0, 0xff, 0xff, 0xff,
669 0xff, 0, 0xc7, 0, 0, 0, 0} },
670 /* 15 */
671 {0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL, /* MAINT OUT */
672 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
673 {ARRAY_SIZE(verify_iarr), 0x8f, 0,
674 F_D_OUT_MAYBE | FF_MEDIA_IO, resp_verify, /* VERIFY(16) */
675 verify_iarr, {16, 0xf6, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
676 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xc7} },
677 {ARRAY_SIZE(vl_iarr), 0x7f, 0x9, F_SA_HIGH | F_D_IN | FF_MEDIA_IO,
678 resp_read_dt0, vl_iarr, /* VARIABLE LENGTH, READ(32) */
679 {32, 0xc7, 0, 0, 0, 0, 0x3f, 0x18, 0x0, 0x9, 0xfe, 0, 0xff, 0xff,
680 0xff, 0xff} },
681 {ARRAY_SIZE(reserve_iarr), 0x56, 0, F_D_OUT,
682 NULL, reserve_iarr, /* RESERVE(10) <no response function> */
683 {10, 0xff, 0xff, 0xff, 0, 0, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0,
684 0} },
685 {ARRAY_SIZE(release_iarr), 0x57, 0, F_D_OUT,
686 NULL, release_iarr, /* RELEASE(10) <no response function> */
687 {10, 0x13, 0xff, 0xff, 0, 0, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0,
688 0} },
689 /* 20 */
690 {0, 0x1e, 0, 0, NULL, NULL, /* ALLOW REMOVAL */
691 {6, 0, 0, 0, 0x3, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
692 {0, 0x1, 0, 0, resp_start_stop, NULL, /* REWIND ?? */
693 {6, 0x1, 0, 0, 0, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
694 {0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL, /* ATA_PT */
695 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
696 {0, 0x1d, F_D_OUT, 0, NULL, NULL, /* SEND DIAGNOSTIC */
697 {6, 0xf7, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
698 {0, 0x42, 0, F_D_OUT | FF_MEDIA_IO, resp_unmap, NULL, /* UNMAP */
699 {10, 0x1, 0, 0, 0, 0, 0x3f, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0} },
700 /* 25 */
701 {0, 0x3b, 0, F_D_OUT_MAYBE, resp_write_buffer, NULL,
702 {10, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0,
703 0, 0, 0, 0} }, /* WRITE_BUFFER */
704 {ARRAY_SIZE(write_same_iarr), 0x41, 0, F_D_OUT_MAYBE | FF_MEDIA_IO,
705 resp_write_same_10, write_same_iarr, /* WRITE SAME(10) */
706 {10, 0xff, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xff, 0xff, 0xc7, 0,
707 0, 0, 0, 0, 0} },
708 {ARRAY_SIZE(sync_cache_iarr), 0x35, 0, F_SYNC_DELAY | F_M_ACCESS,
709 resp_sync_cache, sync_cache_iarr,
710 {10, 0x7, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xff, 0xff, 0xc7, 0, 0,
711 0, 0, 0, 0} }, /* SYNC_CACHE (10) */
712 {0, 0x89, 0, F_D_OUT | FF_MEDIA_IO, resp_comp_write, NULL,
713 {16, 0xf8, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0, 0,
714 0, 0xff, 0x3f, 0xc7} }, /* COMPARE AND WRITE */
715 {ARRAY_SIZE(pre_fetch_iarr), 0x34, 0, F_SYNC_DELAY | FF_MEDIA_IO,
716 resp_pre_fetch, pre_fetch_iarr,
717 {10, 0x2, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xff, 0xff, 0xc7, 0, 0,
718 0, 0, 0, 0} }, /* PRE-FETCH (10) */
719
720 /* 30 */
721 {ARRAY_SIZE(zone_out_iarr), 0x94, 0x3, F_SA_LOW | F_M_ACCESS,
722 resp_open_zone, zone_out_iarr, /* ZONE_OUT(16), OPEN ZONE) */
723 {16, 0x3 /* SA */, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
724 0xff, 0xff, 0x0, 0x0, 0xff, 0xff, 0x1, 0xc7} },
725 {ARRAY_SIZE(zone_in_iarr), 0x95, 0x0, F_SA_LOW | F_M_ACCESS,
726 resp_report_zones, zone_in_iarr, /* ZONE_IN(16), REPORT ZONES) */
727 {16, 0x0 /* SA */, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
728 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xbf, 0xc7} },
729 /* sentinel */
730 {0xff, 0, 0, 0, NULL, NULL, /* terminating element */
731 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} },
732 };
733
734 static int sdebug_num_hosts;
735 static int sdebug_add_host = DEF_NUM_HOST; /* in sysfs this is relative */
736 static int sdebug_ato = DEF_ATO;
737 static int sdebug_cdb_len = DEF_CDB_LEN;
738 static int sdebug_jdelay = DEF_JDELAY; /* if > 0 then unit is jiffies */
739 static int sdebug_dev_size_mb = DEF_DEV_SIZE_PRE_INIT;
740 static int sdebug_dif = DEF_DIF;
741 static int sdebug_dix = DEF_DIX;
742 static int sdebug_dsense = DEF_D_SENSE;
743 static int sdebug_every_nth = DEF_EVERY_NTH;
744 static int sdebug_fake_rw = DEF_FAKE_RW;
745 static unsigned int sdebug_guard = DEF_GUARD;
746 static int sdebug_host_max_queue; /* per host */
747 static int sdebug_lowest_aligned = DEF_LOWEST_ALIGNED;
748 static int sdebug_max_luns = DEF_MAX_LUNS;
749 static int sdebug_max_queue = SDEBUG_CANQUEUE; /* per submit queue */
750 static unsigned int sdebug_medium_error_start = OPT_MEDIUM_ERR_ADDR;
751 static int sdebug_medium_error_count = OPT_MEDIUM_ERR_NUM;
752 static atomic_t retired_max_queue; /* if > 0 then was prior max_queue */
753 static int sdebug_ndelay = DEF_NDELAY; /* if > 0 then unit is nanoseconds */
754 static int sdebug_no_lun_0 = DEF_NO_LUN_0;
755 static int sdebug_no_uld;
756 static int sdebug_num_parts = DEF_NUM_PARTS;
757 static int sdebug_num_tgts = DEF_NUM_TGTS; /* targets per host */
758 static int sdebug_opt_blks = DEF_OPT_BLKS;
759 static int sdebug_opts = DEF_OPTS;
760 static int sdebug_physblk_exp = DEF_PHYSBLK_EXP;
761 static int sdebug_opt_xferlen_exp = DEF_OPT_XFERLEN_EXP;
762 static int sdebug_ptype = DEF_PTYPE; /* SCSI peripheral device type */
763 static int sdebug_scsi_level = DEF_SCSI_LEVEL;
764 static int sdebug_sector_size = DEF_SECTOR_SIZE;
765 static int sdeb_tur_ms_to_ready = DEF_TUR_MS_TO_READY;
766 static int sdebug_virtual_gb = DEF_VIRTUAL_GB;
767 static int sdebug_vpd_use_hostno = DEF_VPD_USE_HOSTNO;
768 static unsigned int sdebug_lbpu = DEF_LBPU;
769 static unsigned int sdebug_lbpws = DEF_LBPWS;
770 static unsigned int sdebug_lbpws10 = DEF_LBPWS10;
771 static unsigned int sdebug_lbprz = DEF_LBPRZ;
772 static unsigned int sdebug_unmap_alignment = DEF_UNMAP_ALIGNMENT;
773 static unsigned int sdebug_unmap_granularity = DEF_UNMAP_GRANULARITY;
774 static unsigned int sdebug_unmap_max_blocks = DEF_UNMAP_MAX_BLOCKS;
775 static unsigned int sdebug_unmap_max_desc = DEF_UNMAP_MAX_DESC;
776 static unsigned int sdebug_write_same_length = DEF_WRITESAME_LENGTH;
777 static int sdebug_uuid_ctl = DEF_UUID_CTL;
778 static bool sdebug_random = DEF_RANDOM;
779 static bool sdebug_per_host_store = DEF_PER_HOST_STORE;
780 static bool sdebug_removable = DEF_REMOVABLE;
781 static bool sdebug_clustering;
782 static bool sdebug_host_lock = DEF_HOST_LOCK;
783 static bool sdebug_strict = DEF_STRICT;
784 static bool sdebug_any_injecting_opt;
785 static bool sdebug_verbose;
786 static bool have_dif_prot;
787 static bool write_since_sync;
788 static bool sdebug_statistics = DEF_STATISTICS;
789 static bool sdebug_wp;
790 /* Following enum: 0: no zbc, def; 1: host aware; 2: host managed */
791 static enum blk_zoned_model sdeb_zbc_model = BLK_ZONED_NONE;
792 static char *sdeb_zbc_model_s;
793
794 static unsigned int sdebug_store_sectors;
795 static sector_t sdebug_capacity; /* in sectors */
796
797 /* old BIOS stuff, kernel may get rid of them but some mode sense pages
798 may still need them */
799 static int sdebug_heads; /* heads per disk */
800 static int sdebug_cylinders_per; /* cylinders per surface */
801 static int sdebug_sectors_per; /* sectors per cylinder */
802
803 static LIST_HEAD(sdebug_host_list);
804 static DEFINE_SPINLOCK(sdebug_host_list_lock);
805
806 static struct xarray per_store_arr;
807 static struct xarray *per_store_ap = &per_store_arr;
808 static int sdeb_first_idx = -1; /* invalid index ==> none created */
809 static int sdeb_most_recent_idx = -1;
810 static DEFINE_RWLOCK(sdeb_fake_rw_lck); /* need a RW lock when fake_rw=1 */
811
812 static unsigned long map_size;
813 static int num_aborts;
814 static int num_dev_resets;
815 static int num_target_resets;
816 static int num_bus_resets;
817 static int num_host_resets;
818 static int dix_writes;
819 static int dix_reads;
820 static int dif_errors;
821
822 /* ZBC global data */
823 static bool sdeb_zbc_in_use; /* true for host-aware and host-managed disks */
824 static int sdeb_zbc_zone_size_mb;
825 static int sdeb_zbc_max_open = DEF_ZBC_MAX_OPEN_ZONES;
826 static int sdeb_zbc_nr_conv = DEF_ZBC_NR_CONV_ZONES;
827
828 static int submit_queues = DEF_SUBMIT_QUEUES; /* > 1 for multi-queue (mq) */
829 static struct sdebug_queue *sdebug_q_arr; /* ptr to array of submit queues */
830
831 static DEFINE_RWLOCK(atomic_rw);
832 static DEFINE_RWLOCK(atomic_rw2);
833
834 static rwlock_t *ramdisk_lck_a[2];
835
836 static char sdebug_proc_name[] = MY_NAME;
837 static const char *my_name = MY_NAME;
838
839 static struct bus_type pseudo_lld_bus;
840
841 static struct device_driver sdebug_driverfs_driver = {
842 .name = sdebug_proc_name,
843 .bus = &pseudo_lld_bus,
844 };
845
846 static const int check_condition_result =
847 (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;
848
849 static const int illegal_condition_result =
850 (DRIVER_SENSE << 24) | (DID_ABORT << 16) | SAM_STAT_CHECK_CONDITION;
851
852 static const int device_qfull_result =
853 (DID_OK << 16) | (COMMAND_COMPLETE << 8) | SAM_STAT_TASK_SET_FULL;
854
855 static const int condition_met_result = SAM_STAT_CONDITION_MET;
856
857
858 /* Only do the extra work involved in logical block provisioning if one or
859 * more of the lbpu, lbpws or lbpws10 parameters are given and we are doing
860 * real reads and writes (i.e. not skipping them for speed).
861 */
862 static inline bool scsi_debug_lbp(void)
863 {
864 return 0 == sdebug_fake_rw &&
865 (sdebug_lbpu || sdebug_lbpws || sdebug_lbpws10);
866 }
867
868 static void *lba2fake_store(struct sdeb_store_info *sip,
869 unsigned long long lba)
870 {
871 struct sdeb_store_info *lsip = sip;
872
873 lba = do_div(lba, sdebug_store_sectors);
874 if (!sip || !sip->storep) {
875 WARN_ON_ONCE(true);
876 lsip = xa_load(per_store_ap, 0); /* should never be NULL */
877 }
878 return lsip->storep + lba * sdebug_sector_size;
879 }
880
881 static struct t10_pi_tuple *dif_store(struct sdeb_store_info *sip,
882 sector_t sector)
883 {
884 sector = sector_div(sector, sdebug_store_sectors);
885
886 return sip->dif_storep + sector;
887 }
888
889 static void sdebug_max_tgts_luns(void)
890 {
891 struct sdebug_host_info *sdbg_host;
892 struct Scsi_Host *hpnt;
893
894 spin_lock(&sdebug_host_list_lock);
895 list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) {
896 hpnt = sdbg_host->shost;
897 if ((hpnt->this_id >= 0) &&
898 (sdebug_num_tgts > hpnt->this_id))
899 hpnt->max_id = sdebug_num_tgts + 1;
900 else
901 hpnt->max_id = sdebug_num_tgts;
902 /* sdebug_max_luns; */
903 hpnt->max_lun = SCSI_W_LUN_REPORT_LUNS + 1;
904 }
905 spin_unlock(&sdebug_host_list_lock);
906 }
907
908 enum sdeb_cmd_data {SDEB_IN_DATA = 0, SDEB_IN_CDB = 1};
909
910 /* Set in_bit to -1 to indicate no bit position of invalid field */
911 static void mk_sense_invalid_fld(struct scsi_cmnd *scp,
912 enum sdeb_cmd_data c_d,
913 int in_byte, int in_bit)
914 {
915 unsigned char *sbuff;
916 u8 sks[4];
917 int sl, asc;
918
919 sbuff = scp->sense_buffer;
920 if (!sbuff) {
921 sdev_printk(KERN_ERR, scp->device,
922 "%s: sense_buffer is NULL\n", __func__);
923 return;
924 }
925 asc = c_d ? INVALID_FIELD_IN_CDB : INVALID_FIELD_IN_PARAM_LIST;
926 memset(sbuff, 0, SCSI_SENSE_BUFFERSIZE);
927 scsi_build_sense_buffer(sdebug_dsense, sbuff, ILLEGAL_REQUEST, asc, 0);
928 memset(sks, 0, sizeof(sks));
929 sks[0] = 0x80;
930 if (c_d)
931 sks[0] |= 0x40;
932 if (in_bit >= 0) {
933 sks[0] |= 0x8;
934 sks[0] |= 0x7 & in_bit;
935 }
936 put_unaligned_be16(in_byte, sks + 1);
937 if (sdebug_dsense) {
938 sl = sbuff[7] + 8;
939 sbuff[7] = sl;
940 sbuff[sl] = 0x2;
941 sbuff[sl + 1] = 0x6;
942 memcpy(sbuff + sl + 4, sks, 3);
943 } else
944 memcpy(sbuff + 15, sks, 3);
945 if (sdebug_verbose)
946 sdev_printk(KERN_INFO, scp->device, "%s: [sense_key,asc,ascq"
947 "]: [0x5,0x%x,0x0] %c byte=%d, bit=%d\n",
948 my_name, asc, c_d ? 'C' : 'D', in_byte, in_bit);
949 }
950
951 static void mk_sense_buffer(struct scsi_cmnd *scp, int key, int asc, int asq)
952 {
953 unsigned char *sbuff;
954
955 sbuff = scp->sense_buffer;
956 if (!sbuff) {
957 sdev_printk(KERN_ERR, scp->device,
958 "%s: sense_buffer is NULL\n", __func__);
959 return;
960 }
961 memset(sbuff, 0, SCSI_SENSE_BUFFERSIZE);
962
963 scsi_build_sense_buffer(sdebug_dsense, sbuff, key, asc, asq);
964
965 if (sdebug_verbose)
966 sdev_printk(KERN_INFO, scp->device,
967 "%s: [sense_key,asc,ascq]: [0x%x,0x%x,0x%x]\n",
968 my_name, key, asc, asq);
969 }
970
971 static void mk_sense_invalid_opcode(struct scsi_cmnd *scp)
972 {
973 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_OPCODE, 0);
974 }
975
976 static int scsi_debug_ioctl(struct scsi_device *dev, unsigned int cmd,
977 void __user *arg)
978 {
979 if (sdebug_verbose) {
980 if (0x1261 == cmd)
981 sdev_printk(KERN_INFO, dev,
982 "%s: BLKFLSBUF [0x1261]\n", __func__);
983 else if (0x5331 == cmd)
984 sdev_printk(KERN_INFO, dev,
985 "%s: CDROM_GET_CAPABILITY [0x5331]\n",
986 __func__);
987 else
988 sdev_printk(KERN_INFO, dev, "%s: cmd=0x%x\n",
989 __func__, cmd);
990 }
991 return -EINVAL;
992 /* return -ENOTTY; // correct return but upsets fdisk */
993 }
994
995 static void config_cdb_len(struct scsi_device *sdev)
996 {
997 switch (sdebug_cdb_len) {
998 case 6: /* suggest 6 byte READ, WRITE and MODE SENSE/SELECT */
999 sdev->use_10_for_rw = false;
1000 sdev->use_16_for_rw = false;
1001 sdev->use_10_for_ms = false;
1002 break;
1003 case 10: /* suggest 10 byte RWs and 6 byte MODE SENSE/SELECT */
1004 sdev->use_10_for_rw = true;
1005 sdev->use_16_for_rw = false;
1006 sdev->use_10_for_ms = false;
1007 break;
1008 case 12: /* suggest 10 byte RWs and 10 byte MODE SENSE/SELECT */
1009 sdev->use_10_for_rw = true;
1010 sdev->use_16_for_rw = false;
1011 sdev->use_10_for_ms = true;
1012 break;
1013 case 16:
1014 sdev->use_10_for_rw = false;
1015 sdev->use_16_for_rw = true;
1016 sdev->use_10_for_ms = true;
1017 break;
1018 case 32: /* No knobs to suggest this so same as 16 for now */
1019 sdev->use_10_for_rw = false;
1020 sdev->use_16_for_rw = true;
1021 sdev->use_10_for_ms = true;
1022 break;
1023 default:
1024 pr_warn("unexpected cdb_len=%d, force to 10\n",
1025 sdebug_cdb_len);
1026 sdev->use_10_for_rw = true;
1027 sdev->use_16_for_rw = false;
1028 sdev->use_10_for_ms = false;
1029 sdebug_cdb_len = 10;
1030 break;
1031 }
1032 }
1033
1034 static void all_config_cdb_len(void)
1035 {
1036 struct sdebug_host_info *sdbg_host;
1037 struct Scsi_Host *shost;
1038 struct scsi_device *sdev;
1039
1040 spin_lock(&sdebug_host_list_lock);
1041 list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) {
1042 shost = sdbg_host->shost;
1043 shost_for_each_device(sdev, shost) {
1044 config_cdb_len(sdev);
1045 }
1046 }
1047 spin_unlock(&sdebug_host_list_lock);
1048 }
1049
1050 static void clear_luns_changed_on_target(struct sdebug_dev_info *devip)
1051 {
1052 struct sdebug_host_info *sdhp;
1053 struct sdebug_dev_info *dp;
1054
1055 spin_lock(&sdebug_host_list_lock);
1056 list_for_each_entry(sdhp, &sdebug_host_list, host_list) {
1057 list_for_each_entry(dp, &sdhp->dev_info_list, dev_list) {
1058 if ((devip->sdbg_host == dp->sdbg_host) &&
1059 (devip->target == dp->target))
1060 clear_bit(SDEBUG_UA_LUNS_CHANGED, dp->uas_bm);
1061 }
1062 }
1063 spin_unlock(&sdebug_host_list_lock);
1064 }
1065
1066 static int make_ua(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
1067 {
1068 int k;
1069
1070 k = find_first_bit(devip->uas_bm, SDEBUG_NUM_UAS);
1071 if (k != SDEBUG_NUM_UAS) {
1072 const char *cp = NULL;
1073
1074 switch (k) {
1075 case SDEBUG_UA_POR:
1076 mk_sense_buffer(scp, UNIT_ATTENTION, UA_RESET_ASC,
1077 POWER_ON_RESET_ASCQ);
1078 if (sdebug_verbose)
1079 cp = "power on reset";
1080 break;
1081 case SDEBUG_UA_BUS_RESET:
1082 mk_sense_buffer(scp, UNIT_ATTENTION, UA_RESET_ASC,
1083 BUS_RESET_ASCQ);
1084 if (sdebug_verbose)
1085 cp = "bus reset";
1086 break;
1087 case SDEBUG_UA_MODE_CHANGED:
1088 mk_sense_buffer(scp, UNIT_ATTENTION, UA_CHANGED_ASC,
1089 MODE_CHANGED_ASCQ);
1090 if (sdebug_verbose)
1091 cp = "mode parameters changed";
1092 break;
1093 case SDEBUG_UA_CAPACITY_CHANGED:
1094 mk_sense_buffer(scp, UNIT_ATTENTION, UA_CHANGED_ASC,
1095 CAPACITY_CHANGED_ASCQ);
1096 if (sdebug_verbose)
1097 cp = "capacity data changed";
1098 break;
1099 case SDEBUG_UA_MICROCODE_CHANGED:
1100 mk_sense_buffer(scp, UNIT_ATTENTION,
1101 TARGET_CHANGED_ASC,
1102 MICROCODE_CHANGED_ASCQ);
1103 if (sdebug_verbose)
1104 cp = "microcode has been changed";
1105 break;
1106 case SDEBUG_UA_MICROCODE_CHANGED_WO_RESET:
1107 mk_sense_buffer(scp, UNIT_ATTENTION,
1108 TARGET_CHANGED_ASC,
1109 MICROCODE_CHANGED_WO_RESET_ASCQ);
1110 if (sdebug_verbose)
1111 cp = "microcode has been changed without reset";
1112 break;
1113 case SDEBUG_UA_LUNS_CHANGED:
1114 /*
1115 * SPC-3 behavior is to report a UNIT ATTENTION with
1116 * ASC/ASCQ REPORTED LUNS DATA HAS CHANGED on every LUN
1117 * on the target, until a REPORT LUNS command is
1118 * received. SPC-4 behavior is to report it only once.
1119 * NOTE: sdebug_scsi_level does not use the same
1120 * values as struct scsi_device->scsi_level.
1121 */
1122 if (sdebug_scsi_level >= 6) /* SPC-4 and above */
1123 clear_luns_changed_on_target(devip);
1124 mk_sense_buffer(scp, UNIT_ATTENTION,
1125 TARGET_CHANGED_ASC,
1126 LUNS_CHANGED_ASCQ);
1127 if (sdebug_verbose)
1128 cp = "reported luns data has changed";
1129 break;
1130 default:
1131 pr_warn("unexpected unit attention code=%d\n", k);
1132 if (sdebug_verbose)
1133 cp = "unknown";
1134 break;
1135 }
1136 clear_bit(k, devip->uas_bm);
1137 if (sdebug_verbose)
1138 sdev_printk(KERN_INFO, scp->device,
1139 "%s reports: Unit attention: %s\n",
1140 my_name, cp);
1141 return check_condition_result;
1142 }
1143 return 0;
1144 }
1145
1146 /* Build SCSI "data-in" buffer. Returns 0 if ok else (DID_ERROR << 16). */
1147 static int fill_from_dev_buffer(struct scsi_cmnd *scp, unsigned char *arr,
1148 int arr_len)
1149 {
1150 int act_len;
1151 struct scsi_data_buffer *sdb = &scp->sdb;
1152
1153 if (!sdb->length)
1154 return 0;
1155 if (scp->sc_data_direction != DMA_FROM_DEVICE)
1156 return DID_ERROR << 16;
1157
1158 act_len = sg_copy_from_buffer(sdb->table.sgl, sdb->table.nents,
1159 arr, arr_len);
1160 scsi_set_resid(scp, scsi_bufflen(scp) - act_len);
1161
1162 return 0;
1163 }
1164
1165 /* Partial build of SCSI "data-in" buffer. Returns 0 if ok else
1166 * (DID_ERROR << 16). Can write to offset in data-in buffer. If multiple
1167 * calls, not required to write in ascending offset order. Assumes resid
1168 * set to scsi_bufflen() prior to any calls.
1169 */
1170 static int p_fill_from_dev_buffer(struct scsi_cmnd *scp, const void *arr,
1171 int arr_len, unsigned int off_dst)
1172 {
1173 unsigned int act_len, n;
1174 struct scsi_data_buffer *sdb = &scp->sdb;
1175 off_t skip = off_dst;
1176
1177 if (sdb->length <= off_dst)
1178 return 0;
1179 if (scp->sc_data_direction != DMA_FROM_DEVICE)
1180 return DID_ERROR << 16;
1181
1182 act_len = sg_pcopy_from_buffer(sdb->table.sgl, sdb->table.nents,
1183 arr, arr_len, skip);
1184 pr_debug("%s: off_dst=%u, scsi_bufflen=%u, act_len=%u, resid=%d\n",
1185 __func__, off_dst, scsi_bufflen(scp), act_len,
1186 scsi_get_resid(scp));
1187 n = scsi_bufflen(scp) - (off_dst + act_len);
1188 scsi_set_resid(scp, min_t(int, scsi_get_resid(scp), n));
1189 return 0;
1190 }
1191
1192 /* Fetches from SCSI "data-out" buffer. Returns number of bytes fetched into
1193 * 'arr' or -1 if error.
1194 */
1195 static int fetch_to_dev_buffer(struct scsi_cmnd *scp, unsigned char *arr,
1196 int arr_len)
1197 {
1198 if (!scsi_bufflen(scp))
1199 return 0;
1200 if (scp->sc_data_direction != DMA_TO_DEVICE)
1201 return -1;
1202
1203 return scsi_sg_copy_to_buffer(scp, arr, arr_len);
1204 }
1205
1206
1207 static char sdebug_inq_vendor_id[9] = "Linux ";
1208 static char sdebug_inq_product_id[17] = "scsi_debug ";
1209 static char sdebug_inq_product_rev[5] = SDEBUG_VERSION;
1210 /* Use some locally assigned NAAs for SAS addresses. */
1211 static const u64 naa3_comp_a = 0x3222222000000000ULL;
1212 static const u64 naa3_comp_b = 0x3333333000000000ULL;
1213 static const u64 naa3_comp_c = 0x3111111000000000ULL;
1214
1215 /* Device identification VPD page. Returns number of bytes placed in arr */
1216 static int inquiry_vpd_83(unsigned char *arr, int port_group_id,
1217 int target_dev_id, int dev_id_num,
1218 const char *dev_id_str, int dev_id_str_len,
1219 const uuid_t *lu_name)
1220 {
1221 int num, port_a;
1222 char b[32];
1223
1224 port_a = target_dev_id + 1;
1225 /* T10 vendor identifier field format (faked) */
1226 arr[0] = 0x2; /* ASCII */
1227 arr[1] = 0x1;
1228 arr[2] = 0x0;
1229 memcpy(&arr[4], sdebug_inq_vendor_id, 8);
1230 memcpy(&arr[12], sdebug_inq_product_id, 16);
1231 memcpy(&arr[28], dev_id_str, dev_id_str_len);
1232 num = 8 + 16 + dev_id_str_len;
1233 arr[3] = num;
1234 num += 4;
1235 if (dev_id_num >= 0) {
1236 if (sdebug_uuid_ctl) {
1237 /* Locally assigned UUID */
1238 arr[num++] = 0x1; /* binary (not necessarily sas) */
1239 arr[num++] = 0xa; /* PIV=0, lu, naa */
1240 arr[num++] = 0x0;
1241 arr[num++] = 0x12;
1242 arr[num++] = 0x10; /* uuid type=1, locally assigned */
1243 arr[num++] = 0x0;
1244 memcpy(arr + num, lu_name, 16);
1245 num += 16;
1246 } else {
1247 /* NAA-3, Logical unit identifier (binary) */
1248 arr[num++] = 0x1; /* binary (not necessarily sas) */
1249 arr[num++] = 0x3; /* PIV=0, lu, naa */
1250 arr[num++] = 0x0;
1251 arr[num++] = 0x8;
1252 put_unaligned_be64(naa3_comp_b + dev_id_num, arr + num);
1253 num += 8;
1254 }
1255 /* Target relative port number */
1256 arr[num++] = 0x61; /* proto=sas, binary */
1257 arr[num++] = 0x94; /* PIV=1, target port, rel port */
1258 arr[num++] = 0x0; /* reserved */
1259 arr[num++] = 0x4; /* length */
1260 arr[num++] = 0x0; /* reserved */
1261 arr[num++] = 0x0; /* reserved */
1262 arr[num++] = 0x0;
1263 arr[num++] = 0x1; /* relative port A */
1264 }
1265 /* NAA-3, Target port identifier */
1266 arr[num++] = 0x61; /* proto=sas, binary */
1267 arr[num++] = 0x93; /* piv=1, target port, naa */
1268 arr[num++] = 0x0;
1269 arr[num++] = 0x8;
1270 put_unaligned_be64(naa3_comp_a + port_a, arr + num);
1271 num += 8;
1272 /* NAA-3, Target port group identifier */
1273 arr[num++] = 0x61; /* proto=sas, binary */
1274 arr[num++] = 0x95; /* piv=1, target port group id */
1275 arr[num++] = 0x0;
1276 arr[num++] = 0x4;
1277 arr[num++] = 0;
1278 arr[num++] = 0;
1279 put_unaligned_be16(port_group_id, arr + num);
1280 num += 2;
1281 /* NAA-3, Target device identifier */
1282 arr[num++] = 0x61; /* proto=sas, binary */
1283 arr[num++] = 0xa3; /* piv=1, target device, naa */
1284 arr[num++] = 0x0;
1285 arr[num++] = 0x8;
1286 put_unaligned_be64(naa3_comp_a + target_dev_id, arr + num);
1287 num += 8;
1288 /* SCSI name string: Target device identifier */
1289 arr[num++] = 0x63; /* proto=sas, UTF-8 */
1290 arr[num++] = 0xa8; /* piv=1, target device, SCSI name string */
1291 arr[num++] = 0x0;
1292 arr[num++] = 24;
1293 memcpy(arr + num, "naa.32222220", 12);
1294 num += 12;
1295 snprintf(b, sizeof(b), "%08X", target_dev_id);
1296 memcpy(arr + num, b, 8);
1297 num += 8;
1298 memset(arr + num, 0, 4);
1299 num += 4;
1300 return num;
1301 }
1302
1303 static unsigned char vpd84_data[] = {
1304 /* from 4th byte */ 0x22,0x22,0x22,0x0,0xbb,0x0,
1305 0x22,0x22,0x22,0x0,0xbb,0x1,
1306 0x22,0x22,0x22,0x0,0xbb,0x2,
1307 };
1308
1309 /* Software interface identification VPD page */
1310 static int inquiry_vpd_84(unsigned char *arr)
1311 {
1312 memcpy(arr, vpd84_data, sizeof(vpd84_data));
1313 return sizeof(vpd84_data);
1314 }
1315
1316 /* Management network addresses VPD page */
1317 static int inquiry_vpd_85(unsigned char *arr)
1318 {
1319 int num = 0;
1320 const char *na1 = "https://www.kernel.org/config";
1321 const char *na2 = "http://www.kernel.org/log";
1322 int plen, olen;
1323
1324 arr[num++] = 0x1; /* lu, storage config */
1325 arr[num++] = 0x0; /* reserved */
1326 arr[num++] = 0x0;
1327 olen = strlen(na1);
1328 plen = olen + 1;
1329 if (plen % 4)
1330 plen = ((plen / 4) + 1) * 4;
1331 arr[num++] = plen; /* length, null termianted, padded */
1332 memcpy(arr + num, na1, olen);
1333 memset(arr + num + olen, 0, plen - olen);
1334 num += plen;
1335
1336 arr[num++] = 0x4; /* lu, logging */
1337 arr[num++] = 0x0; /* reserved */
1338 arr[num++] = 0x0;
1339 olen = strlen(na2);
1340 plen = olen + 1;
1341 if (plen % 4)
1342 plen = ((plen / 4) + 1) * 4;
1343 arr[num++] = plen; /* length, null terminated, padded */
1344 memcpy(arr + num, na2, olen);
1345 memset(arr + num + olen, 0, plen - olen);
1346 num += plen;
1347
1348 return num;
1349 }
1350
1351 /* SCSI ports VPD page */
1352 static int inquiry_vpd_88(unsigned char *arr, int target_dev_id)
1353 {
1354 int num = 0;
1355 int port_a, port_b;
1356
1357 port_a = target_dev_id + 1;
1358 port_b = port_a + 1;
1359 arr[num++] = 0x0; /* reserved */
1360 arr[num++] = 0x0; /* reserved */
1361 arr[num++] = 0x0;
1362 arr[num++] = 0x1; /* relative port 1 (primary) */
1363 memset(arr + num, 0, 6);
1364 num += 6;
1365 arr[num++] = 0x0;
1366 arr[num++] = 12; /* length tp descriptor */
1367 /* naa-5 target port identifier (A) */
1368 arr[num++] = 0x61; /* proto=sas, binary */
1369 arr[num++] = 0x93; /* PIV=1, target port, NAA */
1370 arr[num++] = 0x0; /* reserved */
1371 arr[num++] = 0x8; /* length */
1372 put_unaligned_be64(naa3_comp_a + port_a, arr + num);
1373 num += 8;
1374 arr[num++] = 0x0; /* reserved */
1375 arr[num++] = 0x0; /* reserved */
1376 arr[num++] = 0x0;
1377 arr[num++] = 0x2; /* relative port 2 (secondary) */
1378 memset(arr + num, 0, 6);
1379 num += 6;
1380 arr[num++] = 0x0;
1381 arr[num++] = 12; /* length tp descriptor */
1382 /* naa-5 target port identifier (B) */
1383 arr[num++] = 0x61; /* proto=sas, binary */
1384 arr[num++] = 0x93; /* PIV=1, target port, NAA */
1385 arr[num++] = 0x0; /* reserved */
1386 arr[num++] = 0x8; /* length */
1387 put_unaligned_be64(naa3_comp_a + port_b, arr + num);
1388 num += 8;
1389
1390 return num;
1391 }
1392
1393
1394 static unsigned char vpd89_data[] = {
1395 /* from 4th byte */ 0,0,0,0,
1396 'l','i','n','u','x',' ',' ',' ',
1397 'S','A','T',' ','s','c','s','i','_','d','e','b','u','g',' ',' ',
1398 '1','2','3','4',
1399 0x34,0,0,0,1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,
1400 0xec,0,0,0,
1401 0x5a,0xc,0xff,0x3f,0x37,0xc8,0x10,0,0,0,0,0,0x3f,0,0,0,
1402 0,0,0,0,0x58,0x58,0x58,0x58,0x58,0x58,0x58,0x58,0x20,0x20,0x20,0x20,
1403 0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0,0,0,0x40,0x4,0,0x2e,0x33,
1404 0x38,0x31,0x20,0x20,0x20,0x20,0x54,0x53,0x38,0x33,0x30,0x30,0x33,0x31,
1405 0x53,0x41,
1406 0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,
1407 0x20,0x20,
1408 0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,
1409 0x10,0x80,
1410 0,0,0,0x2f,0,0,0,0x2,0,0x2,0x7,0,0xff,0xff,0x1,0,
1411 0x3f,0,0xc1,0xff,0x3e,0,0x10,0x1,0xb0,0xf8,0x50,0x9,0,0,0x7,0,
1412 0x3,0,0x78,0,0x78,0,0xf0,0,0x78,0,0,0,0,0,0,0,
1413 0,0,0,0,0,0,0,0,0x2,0,0,0,0,0,0,0,
1414 0x7e,0,0x1b,0,0x6b,0x34,0x1,0x7d,0x3,0x40,0x69,0x34,0x1,0x3c,0x3,0x40,
1415 0x7f,0x40,0,0,0,0,0xfe,0xfe,0,0,0,0,0,0xfe,0,0,
1416 0,0,0,0,0,0,0,0,0xb0,0xf8,0x50,0x9,0,0,0,0,
1417 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1418 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1419 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1420 0x1,0,0xb0,0xf8,0x50,0x9,0xb0,0xf8,0x50,0x9,0x20,0x20,0x2,0,0xb6,0x42,
1421 0,0x80,0x8a,0,0x6,0x3c,0xa,0x3c,0xff,0xff,0xc6,0x7,0,0x1,0,0x8,
1422 0xf0,0xf,0,0x10,0x2,0,0x30,0,0,0,0,0,0,0,0x6,0xfe,
1423 0,0,0x2,0,0x50,0,0x8a,0,0x4f,0x95,0,0,0x21,0,0xb,0,
1424 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1425 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1426 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1427 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1428 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1429 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1430 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1431 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1432 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1433 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1434 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1435 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0xa5,0x51,
1436 };
1437
1438 /* ATA Information VPD page */
1439 static int inquiry_vpd_89(unsigned char *arr)
1440 {
1441 memcpy(arr, vpd89_data, sizeof(vpd89_data));
1442 return sizeof(vpd89_data);
1443 }
1444
1445
1446 static unsigned char vpdb0_data[] = {
1447 /* from 4th byte */ 0,0,0,4, 0,0,0x4,0, 0,0,0,64,
1448 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1449 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1450 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
1451 };
1452
1453 /* Block limits VPD page (SBC-3) */
1454 static int inquiry_vpd_b0(unsigned char *arr)
1455 {
1456 unsigned int gran;
1457
1458 memcpy(arr, vpdb0_data, sizeof(vpdb0_data));
1459
1460 /* Optimal transfer length granularity */
1461 if (sdebug_opt_xferlen_exp != 0 &&
1462 sdebug_physblk_exp < sdebug_opt_xferlen_exp)
1463 gran = 1 << sdebug_opt_xferlen_exp;
1464 else
1465 gran = 1 << sdebug_physblk_exp;
1466 put_unaligned_be16(gran, arr + 2);
1467
1468 /* Maximum Transfer Length */
1469 if (sdebug_store_sectors > 0x400)
1470 put_unaligned_be32(sdebug_store_sectors, arr + 4);
1471
1472 /* Optimal Transfer Length */
1473 put_unaligned_be32(sdebug_opt_blks, &arr[8]);
1474
1475 if (sdebug_lbpu) {
1476 /* Maximum Unmap LBA Count */
1477 put_unaligned_be32(sdebug_unmap_max_blocks, &arr[16]);
1478
1479 /* Maximum Unmap Block Descriptor Count */
1480 put_unaligned_be32(sdebug_unmap_max_desc, &arr[20]);
1481 }
1482
1483 /* Unmap Granularity Alignment */
1484 if (sdebug_unmap_alignment) {
1485 put_unaligned_be32(sdebug_unmap_alignment, &arr[28]);
1486 arr[28] |= 0x80; /* UGAVALID */
1487 }
1488
1489 /* Optimal Unmap Granularity */
1490 put_unaligned_be32(sdebug_unmap_granularity, &arr[24]);
1491
1492 /* Maximum WRITE SAME Length */
1493 put_unaligned_be64(sdebug_write_same_length, &arr[32]);
1494
1495 return 0x3c; /* Mandatory page length for Logical Block Provisioning */
1496
1497 return sizeof(vpdb0_data);
1498 }
1499
1500 /* Block device characteristics VPD page (SBC-3) */
1501 static int inquiry_vpd_b1(struct sdebug_dev_info *devip, unsigned char *arr)
1502 {
1503 memset(arr, 0, 0x3c);
1504 arr[0] = 0;
1505 arr[1] = 1; /* non rotating medium (e.g. solid state) */
1506 arr[2] = 0;
1507 arr[3] = 5; /* less than 1.8" */
1508 if (devip->zmodel == BLK_ZONED_HA)
1509 arr[4] = 1 << 4; /* zoned field = 01b */
1510
1511 return 0x3c;
1512 }
1513
1514 /* Logical block provisioning VPD page (SBC-4) */
1515 static int inquiry_vpd_b2(unsigned char *arr)
1516 {
1517 memset(arr, 0, 0x4);
1518 arr[0] = 0; /* threshold exponent */
1519 if (sdebug_lbpu)
1520 arr[1] = 1 << 7;
1521 if (sdebug_lbpws)
1522 arr[1] |= 1 << 6;
1523 if (sdebug_lbpws10)
1524 arr[1] |= 1 << 5;
1525 if (sdebug_lbprz && scsi_debug_lbp())
1526 arr[1] |= (sdebug_lbprz & 0x7) << 2; /* sbc4r07 and later */
1527 /* anc_sup=0; dp=0 (no provisioning group descriptor) */
1528 /* minimum_percentage=0; provisioning_type=0 (unknown) */
1529 /* threshold_percentage=0 */
1530 return 0x4;
1531 }
1532
1533 /* Zoned block device characteristics VPD page (ZBC mandatory) */
1534 static int inquiry_vpd_b6(struct sdebug_dev_info *devip, unsigned char *arr)
1535 {
1536 memset(arr, 0, 0x3c);
1537 arr[0] = 0x1; /* set URSWRZ (unrestricted read in seq. wr req zone) */
1538 /*
1539 * Set Optimal number of open sequential write preferred zones and
1540 * Optimal number of non-sequentially written sequential write
1541 * preferred zones fields to 'not reported' (0xffffffff). Leave other
1542 * fields set to zero, apart from Max. number of open swrz_s field.
1543 */
1544 put_unaligned_be32(0xffffffff, &arr[4]);
1545 put_unaligned_be32(0xffffffff, &arr[8]);
1546 if (sdeb_zbc_model == BLK_ZONED_HM && devip->max_open)
1547 put_unaligned_be32(devip->max_open, &arr[12]);
1548 else
1549 put_unaligned_be32(0xffffffff, &arr[12]);
1550 return 0x3c;
1551 }
1552
1553 #define SDEBUG_LONG_INQ_SZ 96
1554 #define SDEBUG_MAX_INQ_ARR_SZ 584
1555
1556 static int resp_inquiry(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
1557 {
1558 unsigned char pq_pdt;
1559 unsigned char *arr;
1560 unsigned char *cmd = scp->cmnd;
1561 int alloc_len, n, ret;
1562 bool have_wlun, is_disk, is_zbc, is_disk_zbc;
1563
1564 alloc_len = get_unaligned_be16(cmd + 3);
1565 arr = kzalloc(SDEBUG_MAX_INQ_ARR_SZ, GFP_ATOMIC);
1566 if (! arr)
1567 return DID_REQUEUE << 16;
1568 is_disk = (sdebug_ptype == TYPE_DISK);
1569 is_zbc = (devip->zmodel != BLK_ZONED_NONE);
1570 is_disk_zbc = (is_disk || is_zbc);
1571 have_wlun = scsi_is_wlun(scp->device->lun);
1572 if (have_wlun)
1573 pq_pdt = TYPE_WLUN; /* present, wlun */
1574 else if (sdebug_no_lun_0 && (devip->lun == SDEBUG_LUN_0_VAL))
1575 pq_pdt = 0x7f; /* not present, PQ=3, PDT=0x1f */
1576 else
1577 pq_pdt = (sdebug_ptype & 0x1f);
1578 arr[0] = pq_pdt;
1579 if (0x2 & cmd[1]) { /* CMDDT bit set */
1580 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 1);
1581 kfree(arr);
1582 return check_condition_result;
1583 } else if (0x1 & cmd[1]) { /* EVPD bit set */
1584 int lu_id_num, port_group_id, target_dev_id, len;
1585 char lu_id_str[6];
1586 int host_no = devip->sdbg_host->shost->host_no;
1587
1588 port_group_id = (((host_no + 1) & 0x7f) << 8) +
1589 (devip->channel & 0x7f);
1590 if (sdebug_vpd_use_hostno == 0)
1591 host_no = 0;
1592 lu_id_num = have_wlun ? -1 : (((host_no + 1) * 2000) +
1593 (devip->target * 1000) + devip->lun);
1594 target_dev_id = ((host_no + 1) * 2000) +
1595 (devip->target * 1000) - 3;
1596 len = scnprintf(lu_id_str, 6, "%d", lu_id_num);
1597 if (0 == cmd[2]) { /* supported vital product data pages */
1598 arr[1] = cmd[2]; /*sanity */
1599 n = 4;
1600 arr[n++] = 0x0; /* this page */
1601 arr[n++] = 0x80; /* unit serial number */
1602 arr[n++] = 0x83; /* device identification */
1603 arr[n++] = 0x84; /* software interface ident. */
1604 arr[n++] = 0x85; /* management network addresses */
1605 arr[n++] = 0x86; /* extended inquiry */
1606 arr[n++] = 0x87; /* mode page policy */
1607 arr[n++] = 0x88; /* SCSI ports */
1608 if (is_disk_zbc) { /* SBC or ZBC */
1609 arr[n++] = 0x89; /* ATA information */
1610 arr[n++] = 0xb0; /* Block limits */
1611 arr[n++] = 0xb1; /* Block characteristics */
1612 if (is_disk)
1613 arr[n++] = 0xb2; /* LB Provisioning */
1614 if (is_zbc)
1615 arr[n++] = 0xb6; /* ZB dev. char. */
1616 }
1617 arr[3] = n - 4; /* number of supported VPD pages */
1618 } else if (0x80 == cmd[2]) { /* unit serial number */
1619 arr[1] = cmd[2]; /*sanity */
1620 arr[3] = len;
1621 memcpy(&arr[4], lu_id_str, len);
1622 } else if (0x83 == cmd[2]) { /* device identification */
1623 arr[1] = cmd[2]; /*sanity */
1624 arr[3] = inquiry_vpd_83(&arr[4], port_group_id,
1625 target_dev_id, lu_id_num,
1626 lu_id_str, len,
1627 &devip->lu_name);
1628 } else if (0x84 == cmd[2]) { /* Software interface ident. */
1629 arr[1] = cmd[2]; /*sanity */
1630 arr[3] = inquiry_vpd_84(&arr[4]);
1631 } else if (0x85 == cmd[2]) { /* Management network addresses */
1632 arr[1] = cmd[2]; /*sanity */
1633 arr[3] = inquiry_vpd_85(&arr[4]);
1634 } else if (0x86 == cmd[2]) { /* extended inquiry */
1635 arr[1] = cmd[2]; /*sanity */
1636 arr[3] = 0x3c; /* number of following entries */
1637 if (sdebug_dif == T10_PI_TYPE3_PROTECTION)
1638 arr[4] = 0x4; /* SPT: GRD_CHK:1 */
1639 else if (have_dif_prot)
1640 arr[4] = 0x5; /* SPT: GRD_CHK:1, REF_CHK:1 */
1641 else
1642 arr[4] = 0x0; /* no protection stuff */
1643 arr[5] = 0x7; /* head of q, ordered + simple q's */
1644 } else if (0x87 == cmd[2]) { /* mode page policy */
1645 arr[1] = cmd[2]; /*sanity */
1646 arr[3] = 0x8; /* number of following entries */
1647 arr[4] = 0x2; /* disconnect-reconnect mp */
1648 arr[6] = 0x80; /* mlus, shared */
1649 arr[8] = 0x18; /* protocol specific lu */
1650 arr[10] = 0x82; /* mlus, per initiator port */
1651 } else if (0x88 == cmd[2]) { /* SCSI Ports */
1652 arr[1] = cmd[2]; /*sanity */
1653 arr[3] = inquiry_vpd_88(&arr[4], target_dev_id);
1654 } else if (is_disk_zbc && 0x89 == cmd[2]) { /* ATA info */
1655 arr[1] = cmd[2]; /*sanity */
1656 n = inquiry_vpd_89(&arr[4]);
1657 put_unaligned_be16(n, arr + 2);
1658 } else if (is_disk_zbc && 0xb0 == cmd[2]) { /* Block limits */
1659 arr[1] = cmd[2]; /*sanity */
1660 arr[3] = inquiry_vpd_b0(&arr[4]);
1661 } else if (is_disk_zbc && 0xb1 == cmd[2]) { /* Block char. */
1662 arr[1] = cmd[2]; /*sanity */
1663 arr[3] = inquiry_vpd_b1(devip, &arr[4]);
1664 } else if (is_disk && 0xb2 == cmd[2]) { /* LB Prov. */
1665 arr[1] = cmd[2]; /*sanity */
1666 arr[3] = inquiry_vpd_b2(&arr[4]);
1667 } else if (is_zbc && cmd[2] == 0xb6) { /* ZB dev. charact. */
1668 arr[1] = cmd[2]; /*sanity */
1669 arr[3] = inquiry_vpd_b6(devip, &arr[4]);
1670 } else {
1671 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, -1);
1672 kfree(arr);
1673 return check_condition_result;
1674 }
1675 len = min(get_unaligned_be16(arr + 2) + 4, alloc_len);
1676 ret = fill_from_dev_buffer(scp, arr,
1677 min(len, SDEBUG_MAX_INQ_ARR_SZ));
1678 kfree(arr);
1679 return ret;
1680 }
1681 /* drops through here for a standard inquiry */
1682 arr[1] = sdebug_removable ? 0x80 : 0; /* Removable disk */
1683 arr[2] = sdebug_scsi_level;
1684 arr[3] = 2; /* response_data_format==2 */
1685 arr[4] = SDEBUG_LONG_INQ_SZ - 5;
1686 arr[5] = (int)have_dif_prot; /* PROTECT bit */
1687 if (sdebug_vpd_use_hostno == 0)
1688 arr[5] |= 0x10; /* claim: implicit TPGS */
1689 arr[6] = 0x10; /* claim: MultiP */
1690 /* arr[6] |= 0x40; ... claim: EncServ (enclosure services) */
1691 arr[7] = 0xa; /* claim: LINKED + CMDQUE */
1692 memcpy(&arr[8], sdebug_inq_vendor_id, 8);
1693 memcpy(&arr[16], sdebug_inq_product_id, 16);
1694 memcpy(&arr[32], sdebug_inq_product_rev, 4);
1695 /* Use Vendor Specific area to place driver date in ASCII hex */
1696 memcpy(&arr[36], sdebug_version_date, 8);
1697 /* version descriptors (2 bytes each) follow */
1698 put_unaligned_be16(0xc0, arr + 58); /* SAM-6 no version claimed */
1699 put_unaligned_be16(0x5c0, arr + 60); /* SPC-5 no version claimed */
1700 n = 62;
1701 if (is_disk) { /* SBC-4 no version claimed */
1702 put_unaligned_be16(0x600, arr + n);
1703 n += 2;
1704 } else if (sdebug_ptype == TYPE_TAPE) { /* SSC-4 rev 3 */
1705 put_unaligned_be16(0x525, arr + n);
1706 n += 2;
1707 } else if (is_zbc) { /* ZBC BSR INCITS 536 revision 05 */
1708 put_unaligned_be16(0x624, arr + n);
1709 n += 2;
1710 }
1711 put_unaligned_be16(0x2100, arr + n); /* SPL-4 no version claimed */
1712 ret = fill_from_dev_buffer(scp, arr,
1713 min_t(int, alloc_len, SDEBUG_LONG_INQ_SZ));
1714 kfree(arr);
1715 return ret;
1716 }
1717
1718 /* See resp_iec_m_pg() for how this data is manipulated */
1719 static unsigned char iec_m_pg[] = {0x1c, 0xa, 0x08, 0, 0, 0, 0, 0,
1720 0, 0, 0x0, 0x0};
1721
1722 static int resp_requests(struct scsi_cmnd *scp,
1723 struct sdebug_dev_info *devip)
1724 {
1725 unsigned char *cmd = scp->cmnd;
1726 unsigned char arr[SCSI_SENSE_BUFFERSIZE]; /* assume >= 18 bytes */
1727 bool dsense = !!(cmd[1] & 1);
1728 int alloc_len = cmd[4];
1729 int len = 18;
1730 int stopped_state = atomic_read(&devip->stopped);
1731
1732 memset(arr, 0, sizeof(arr));
1733 if (stopped_state > 0) { /* some "pollable" data [spc6r02: 5.12.2] */
1734 if (dsense) {
1735 arr[0] = 0x72;
1736 arr[1] = NOT_READY;
1737 arr[2] = LOGICAL_UNIT_NOT_READY;
1738 arr[3] = (stopped_state == 2) ? 0x1 : 0x2;
1739 len = 8;
1740 } else {
1741 arr[0] = 0x70;
1742 arr[2] = NOT_READY; /* NO_SENSE in sense_key */
1743 arr[7] = 0xa; /* 18 byte sense buffer */
1744 arr[12] = LOGICAL_UNIT_NOT_READY;
1745 arr[13] = (stopped_state == 2) ? 0x1 : 0x2;
1746 }
1747 } else if ((iec_m_pg[2] & 0x4) && (6 == (iec_m_pg[3] & 0xf))) {
1748 /* Information exceptions control mode page: TEST=1, MRIE=6 */
1749 if (dsense) {
1750 arr[0] = 0x72;
1751 arr[1] = 0x0; /* NO_SENSE in sense_key */
1752 arr[2] = THRESHOLD_EXCEEDED;
1753 arr[3] = 0xff; /* Failure prediction(false) */
1754 len = 8;
1755 } else {
1756 arr[0] = 0x70;
1757 arr[2] = 0x0; /* NO_SENSE in sense_key */
1758 arr[7] = 0xa; /* 18 byte sense buffer */
1759 arr[12] = THRESHOLD_EXCEEDED;
1760 arr[13] = 0xff; /* Failure prediction(false) */
1761 }
1762 } else { /* nothing to report */
1763 if (dsense) {
1764 len = 8;
1765 memset(arr, 0, len);
1766 arr[0] = 0x72;
1767 } else {
1768 memset(arr, 0, len);
1769 arr[0] = 0x70;
1770 arr[7] = 0xa;
1771 }
1772 }
1773 return fill_from_dev_buffer(scp, arr, min_t(int, len, alloc_len));
1774 }
1775
1776 static int resp_start_stop(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
1777 {
1778 unsigned char *cmd = scp->cmnd;
1779 int power_cond, want_stop, stopped_state;
1780 bool changing;
1781
1782 power_cond = (cmd[4] & 0xf0) >> 4;
1783 if (power_cond) {
1784 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 4, 7);
1785 return check_condition_result;
1786 }
1787 want_stop = !(cmd[4] & 1);
1788 stopped_state = atomic_read(&devip->stopped);
1789 if (stopped_state == 2) {
1790 ktime_t now_ts = ktime_get_boottime();
1791
1792 if (ktime_to_ns(now_ts) > ktime_to_ns(devip->create_ts)) {
1793 u64 diff_ns = ktime_to_ns(ktime_sub(now_ts, devip->create_ts));
1794
1795 if (diff_ns >= ((u64)sdeb_tur_ms_to_ready * 1000000)) {
1796 /* tur_ms_to_ready timer extinguished */
1797 atomic_set(&devip->stopped, 0);
1798 stopped_state = 0;
1799 }
1800 }
1801 if (stopped_state == 2) {
1802 if (want_stop) {
1803 stopped_state = 1; /* dummy up success */
1804 } else { /* Disallow tur_ms_to_ready delay to be overridden */
1805 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 4, 0 /* START bit */);
1806 return check_condition_result;
1807 }
1808 }
1809 }
1810 changing = (stopped_state != want_stop);
1811 if (changing)
1812 atomic_xchg(&devip->stopped, want_stop);
1813 if (!changing || (cmd[1] & 0x1)) /* state unchanged or IMMED bit set in cdb */
1814 return SDEG_RES_IMMED_MASK;
1815 else
1816 return 0;
1817 }
1818
1819 static sector_t get_sdebug_capacity(void)
1820 {
1821 static const unsigned int gibibyte = 1073741824;
1822
1823 if (sdebug_virtual_gb > 0)
1824 return (sector_t)sdebug_virtual_gb *
1825 (gibibyte / sdebug_sector_size);
1826 else
1827 return sdebug_store_sectors;
1828 }
1829
1830 #define SDEBUG_READCAP_ARR_SZ 8
1831 static int resp_readcap(struct scsi_cmnd *scp,
1832 struct sdebug_dev_info *devip)
1833 {
1834 unsigned char arr[SDEBUG_READCAP_ARR_SZ];
1835 unsigned int capac;
1836
1837 /* following just in case virtual_gb changed */
1838 sdebug_capacity = get_sdebug_capacity();
1839 memset(arr, 0, SDEBUG_READCAP_ARR_SZ);
1840 if (sdebug_capacity < 0xffffffff) {
1841 capac = (unsigned int)sdebug_capacity - 1;
1842 put_unaligned_be32(capac, arr + 0);
1843 } else
1844 put_unaligned_be32(0xffffffff, arr + 0);
1845 put_unaligned_be16(sdebug_sector_size, arr + 6);
1846 return fill_from_dev_buffer(scp, arr, SDEBUG_READCAP_ARR_SZ);
1847 }
1848
1849 #define SDEBUG_READCAP16_ARR_SZ 32
1850 static int resp_readcap16(struct scsi_cmnd *scp,
1851 struct sdebug_dev_info *devip)
1852 {
1853 unsigned char *cmd = scp->cmnd;
1854 unsigned char arr[SDEBUG_READCAP16_ARR_SZ];
1855 int alloc_len;
1856
1857 alloc_len = get_unaligned_be32(cmd + 10);
1858 /* following just in case virtual_gb changed */
1859 sdebug_capacity = get_sdebug_capacity();
1860 memset(arr, 0, SDEBUG_READCAP16_ARR_SZ);
1861 put_unaligned_be64((u64)(sdebug_capacity - 1), arr + 0);
1862 put_unaligned_be32(sdebug_sector_size, arr + 8);
1863 arr[13] = sdebug_physblk_exp & 0xf;
1864 arr[14] = (sdebug_lowest_aligned >> 8) & 0x3f;
1865
1866 if (scsi_debug_lbp()) {
1867 arr[14] |= 0x80; /* LBPME */
1868 /* from sbc4r07, this LBPRZ field is 1 bit, but the LBPRZ in
1869 * the LB Provisioning VPD page is 3 bits. Note that lbprz=2
1870 * in the wider field maps to 0 in this field.
1871 */
1872 if (sdebug_lbprz & 1) /* precisely what the draft requires */
1873 arr[14] |= 0x40;
1874 }
1875
1876 arr[15] = sdebug_lowest_aligned & 0xff;
1877
1878 if (have_dif_prot) {
1879 arr[12] = (sdebug_dif - 1) << 1; /* P_TYPE */
1880 arr[12] |= 1; /* PROT_EN */
1881 }
1882
1883 return fill_from_dev_buffer(scp, arr,
1884 min_t(int, alloc_len, SDEBUG_READCAP16_ARR_SZ));
1885 }
1886
1887 #define SDEBUG_MAX_TGTPGS_ARR_SZ 1412
1888
1889 static int resp_report_tgtpgs(struct scsi_cmnd *scp,
1890 struct sdebug_dev_info *devip)
1891 {
1892 unsigned char *cmd = scp->cmnd;
1893 unsigned char *arr;
1894 int host_no = devip->sdbg_host->shost->host_no;
1895 int n, ret, alen, rlen;
1896 int port_group_a, port_group_b, port_a, port_b;
1897
1898 alen = get_unaligned_be32(cmd + 6);
1899 arr = kzalloc(SDEBUG_MAX_TGTPGS_ARR_SZ, GFP_ATOMIC);
1900 if (! arr)
1901 return DID_REQUEUE << 16;
1902 /*
1903 * EVPD page 0x88 states we have two ports, one
1904 * real and a fake port with no device connected.
1905 * So we create two port groups with one port each
1906 * and set the group with port B to unavailable.
1907 */
1908 port_a = 0x1; /* relative port A */
1909 port_b = 0x2; /* relative port B */
1910 port_group_a = (((host_no + 1) & 0x7f) << 8) +
1911 (devip->channel & 0x7f);
1912 port_group_b = (((host_no + 1) & 0x7f) << 8) +
1913 (devip->channel & 0x7f) + 0x80;
1914
1915 /*
1916 * The asymmetric access state is cycled according to the host_id.
1917 */
1918 n = 4;
1919 if (sdebug_vpd_use_hostno == 0) {
1920 arr[n++] = host_no % 3; /* Asymm access state */
1921 arr[n++] = 0x0F; /* claim: all states are supported */
1922 } else {
1923 arr[n++] = 0x0; /* Active/Optimized path */
1924 arr[n++] = 0x01; /* only support active/optimized paths */
1925 }
1926 put_unaligned_be16(port_group_a, arr + n);
1927 n += 2;
1928 arr[n++] = 0; /* Reserved */
1929 arr[n++] = 0; /* Status code */
1930 arr[n++] = 0; /* Vendor unique */
1931 arr[n++] = 0x1; /* One port per group */
1932 arr[n++] = 0; /* Reserved */
1933 arr[n++] = 0; /* Reserved */
1934 put_unaligned_be16(port_a, arr + n);
1935 n += 2;
1936 arr[n++] = 3; /* Port unavailable */
1937 arr[n++] = 0x08; /* claim: only unavailalbe paths are supported */
1938 put_unaligned_be16(port_group_b, arr + n);
1939 n += 2;
1940 arr[n++] = 0; /* Reserved */
1941 arr[n++] = 0; /* Status code */
1942 arr[n++] = 0; /* Vendor unique */
1943 arr[n++] = 0x1; /* One port per group */
1944 arr[n++] = 0; /* Reserved */
1945 arr[n++] = 0; /* Reserved */
1946 put_unaligned_be16(port_b, arr + n);
1947 n += 2;
1948
1949 rlen = n - 4;
1950 put_unaligned_be32(rlen, arr + 0);
1951
1952 /*
1953 * Return the smallest value of either
1954 * - The allocated length
1955 * - The constructed command length
1956 * - The maximum array size
1957 */
1958 rlen = min_t(int, alen, n);
1959 ret = fill_from_dev_buffer(scp, arr,
1960 min_t(int, rlen, SDEBUG_MAX_TGTPGS_ARR_SZ));
1961 kfree(arr);
1962 return ret;
1963 }
1964
1965 static int resp_rsup_opcodes(struct scsi_cmnd *scp,
1966 struct sdebug_dev_info *devip)
1967 {
1968 bool rctd;
1969 u8 reporting_opts, req_opcode, sdeb_i, supp;
1970 u16 req_sa, u;
1971 u32 alloc_len, a_len;
1972 int k, offset, len, errsts, count, bump, na;
1973 const struct opcode_info_t *oip;
1974 const struct opcode_info_t *r_oip;
1975 u8 *arr;
1976 u8 *cmd = scp->cmnd;
1977
1978 rctd = !!(cmd[2] & 0x80);
1979 reporting_opts = cmd[2] & 0x7;
1980 req_opcode = cmd[3];
1981 req_sa = get_unaligned_be16(cmd + 4);
1982 alloc_len = get_unaligned_be32(cmd + 6);
1983 if (alloc_len < 4 || alloc_len > 0xffff) {
1984 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 6, -1);
1985 return check_condition_result;
1986 }
1987 if (alloc_len > 8192)
1988 a_len = 8192;
1989 else
1990 a_len = alloc_len;
1991 arr = kzalloc((a_len < 256) ? 320 : a_len + 64, GFP_ATOMIC);
1992 if (NULL == arr) {
1993 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
1994 INSUFF_RES_ASCQ);
1995 return check_condition_result;
1996 }
1997 switch (reporting_opts) {
1998 case 0: /* all commands */
1999 /* count number of commands */
2000 for (count = 0, oip = opcode_info_arr;
2001 oip->num_attached != 0xff; ++oip) {
2002 if (F_INV_OP & oip->flags)
2003 continue;
2004 count += (oip->num_attached + 1);
2005 }
2006 bump = rctd ? 20 : 8;
2007 put_unaligned_be32(count * bump, arr);
2008 for (offset = 4, oip = opcode_info_arr;
2009 oip->num_attached != 0xff && offset < a_len; ++oip) {
2010 if (F_INV_OP & oip->flags)
2011 continue;
2012 na = oip->num_attached;
2013 arr[offset] = oip->opcode;
2014 put_unaligned_be16(oip->sa, arr + offset + 2);
2015 if (rctd)
2016 arr[offset + 5] |= 0x2;
2017 if (FF_SA & oip->flags)
2018 arr[offset + 5] |= 0x1;
2019 put_unaligned_be16(oip->len_mask[0], arr + offset + 6);
2020 if (rctd)
2021 put_unaligned_be16(0xa, arr + offset + 8);
2022 r_oip = oip;
2023 for (k = 0, oip = oip->arrp; k < na; ++k, ++oip) {
2024 if (F_INV_OP & oip->flags)
2025 continue;
2026 offset += bump;
2027 arr[offset] = oip->opcode;
2028 put_unaligned_be16(oip->sa, arr + offset + 2);
2029 if (rctd)
2030 arr[offset + 5] |= 0x2;
2031 if (FF_SA & oip->flags)
2032 arr[offset + 5] |= 0x1;
2033 put_unaligned_be16(oip->len_mask[0],
2034 arr + offset + 6);
2035 if (rctd)
2036 put_unaligned_be16(0xa,
2037 arr + offset + 8);
2038 }
2039 oip = r_oip;
2040 offset += bump;
2041 }
2042 break;
2043 case 1: /* one command: opcode only */
2044 case 2: /* one command: opcode plus service action */
2045 case 3: /* one command: if sa==0 then opcode only else opcode+sa */
2046 sdeb_i = opcode_ind_arr[req_opcode];
2047 oip = &opcode_info_arr[sdeb_i];
2048 if (F_INV_OP & oip->flags) {
2049 supp = 1;
2050 offset = 4;
2051 } else {
2052 if (1 == reporting_opts) {
2053 if (FF_SA & oip->flags) {
2054 mk_sense_invalid_fld(scp, SDEB_IN_CDB,
2055 2, 2);
2056 kfree(arr);
2057 return check_condition_result;
2058 }
2059 req_sa = 0;
2060 } else if (2 == reporting_opts &&
2061 0 == (FF_SA & oip->flags)) {
2062 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 4, -1);
2063 kfree(arr); /* point at requested sa */
2064 return check_condition_result;
2065 }
2066 if (0 == (FF_SA & oip->flags) &&
2067 req_opcode == oip->opcode)
2068 supp = 3;
2069 else if (0 == (FF_SA & oip->flags)) {
2070 na = oip->num_attached;
2071 for (k = 0, oip = oip->arrp; k < na;
2072 ++k, ++oip) {
2073 if (req_opcode == oip->opcode)
2074 break;
2075 }
2076 supp = (k >= na) ? 1 : 3;
2077 } else if (req_sa != oip->sa) {
2078 na = oip->num_attached;
2079 for (k = 0, oip = oip->arrp; k < na;
2080 ++k, ++oip) {
2081 if (req_sa == oip->sa)
2082 break;
2083 }
2084 supp = (k >= na) ? 1 : 3;
2085 } else
2086 supp = 3;
2087 if (3 == supp) {
2088 u = oip->len_mask[0];
2089 put_unaligned_be16(u, arr + 2);
2090 arr[4] = oip->opcode;
2091 for (k = 1; k < u; ++k)
2092 arr[4 + k] = (k < 16) ?
2093 oip->len_mask[k] : 0xff;
2094 offset = 4 + u;
2095 } else
2096 offset = 4;
2097 }
2098 arr[1] = (rctd ? 0x80 : 0) | supp;
2099 if (rctd) {
2100 put_unaligned_be16(0xa, arr + offset);
2101 offset += 12;
2102 }
2103 break;
2104 default:
2105 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 2);
2106 kfree(arr);
2107 return check_condition_result;
2108 }
2109 offset = (offset < a_len) ? offset : a_len;
2110 len = (offset < alloc_len) ? offset : alloc_len;
2111 errsts = fill_from_dev_buffer(scp, arr, len);
2112 kfree(arr);
2113 return errsts;
2114 }
2115
2116 static int resp_rsup_tmfs(struct scsi_cmnd *scp,
2117 struct sdebug_dev_info *devip)
2118 {
2119 bool repd;
2120 u32 alloc_len, len;
2121 u8 arr[16];
2122 u8 *cmd = scp->cmnd;
2123
2124 memset(arr, 0, sizeof(arr));
2125 repd = !!(cmd[2] & 0x80);
2126 alloc_len = get_unaligned_be32(cmd + 6);
2127 if (alloc_len < 4) {
2128 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 6, -1);
2129 return check_condition_result;
2130 }
2131 arr[0] = 0xc8; /* ATS | ATSS | LURS */
2132 arr[1] = 0x1; /* ITNRS */
2133 if (repd) {
2134 arr[3] = 0xc;
2135 len = 16;
2136 } else
2137 len = 4;
2138
2139 len = (len < alloc_len) ? len : alloc_len;
2140 return fill_from_dev_buffer(scp, arr, len);
2141 }
2142
2143 /* <<Following mode page info copied from ST318451LW>> */
2144
2145 static int resp_err_recov_pg(unsigned char *p, int pcontrol, int target)
2146 { /* Read-Write Error Recovery page for mode_sense */
2147 unsigned char err_recov_pg[] = {0x1, 0xa, 0xc0, 11, 240, 0, 0, 0,
2148 5, 0, 0xff, 0xff};
2149
2150 memcpy(p, err_recov_pg, sizeof(err_recov_pg));
2151 if (1 == pcontrol)
2152 memset(p + 2, 0, sizeof(err_recov_pg) - 2);
2153 return sizeof(err_recov_pg);
2154 }
2155
2156 static int resp_disconnect_pg(unsigned char *p, int pcontrol, int target)
2157 { /* Disconnect-Reconnect page for mode_sense */
2158 unsigned char disconnect_pg[] = {0x2, 0xe, 128, 128, 0, 10, 0, 0,
2159 0, 0, 0, 0, 0, 0, 0, 0};
2160
2161 memcpy(p, disconnect_pg, sizeof(disconnect_pg));
2162 if (1 == pcontrol)
2163 memset(p + 2, 0, sizeof(disconnect_pg) - 2);
2164 return sizeof(disconnect_pg);
2165 }
2166
2167 static int resp_format_pg(unsigned char *p, int pcontrol, int target)
2168 { /* Format device page for mode_sense */
2169 unsigned char format_pg[] = {0x3, 0x16, 0, 0, 0, 0, 0, 0,
2170 0, 0, 0, 0, 0, 0, 0, 0,
2171 0, 0, 0, 0, 0x40, 0, 0, 0};
2172
2173 memcpy(p, format_pg, sizeof(format_pg));
2174 put_unaligned_be16(sdebug_sectors_per, p + 10);
2175 put_unaligned_be16(sdebug_sector_size, p + 12);
2176 if (sdebug_removable)
2177 p[20] |= 0x20; /* should agree with INQUIRY */
2178 if (1 == pcontrol)
2179 memset(p + 2, 0, sizeof(format_pg) - 2);
2180 return sizeof(format_pg);
2181 }
2182
2183 static unsigned char caching_pg[] = {0x8, 18, 0x14, 0, 0xff, 0xff, 0, 0,
2184 0xff, 0xff, 0xff, 0xff, 0x80, 0x14, 0, 0,
2185 0, 0, 0, 0};
2186
2187 static int resp_caching_pg(unsigned char *p, int pcontrol, int target)
2188 { /* Caching page for mode_sense */
2189 unsigned char ch_caching_pg[] = {/* 0x8, 18, */ 0x4, 0, 0, 0, 0, 0,
2190 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
2191 unsigned char d_caching_pg[] = {0x8, 18, 0x14, 0, 0xff, 0xff, 0, 0,
2192 0xff, 0xff, 0xff, 0xff, 0x80, 0x14, 0, 0, 0, 0, 0, 0};
2193
2194 if (SDEBUG_OPT_N_WCE & sdebug_opts)
2195 caching_pg[2] &= ~0x4; /* set WCE=0 (default WCE=1) */
2196 memcpy(p, caching_pg, sizeof(caching_pg));
2197 if (1 == pcontrol)
2198 memcpy(p + 2, ch_caching_pg, sizeof(ch_caching_pg));
2199 else if (2 == pcontrol)
2200 memcpy(p, d_caching_pg, sizeof(d_caching_pg));
2201 return sizeof(caching_pg);
2202 }
2203
2204 static unsigned char ctrl_m_pg[] = {0xa, 10, 2, 0, 0, 0, 0, 0,
2205 0, 0, 0x2, 0x4b};
2206
2207 static int resp_ctrl_m_pg(unsigned char *p, int pcontrol, int target)
2208 { /* Control mode page for mode_sense */
2209 unsigned char ch_ctrl_m_pg[] = {/* 0xa, 10, */ 0x6, 0, 0, 0, 0, 0,
2210 0, 0, 0, 0};
2211 unsigned char d_ctrl_m_pg[] = {0xa, 10, 2, 0, 0, 0, 0, 0,
2212 0, 0, 0x2, 0x4b};
2213
2214 if (sdebug_dsense)
2215 ctrl_m_pg[2] |= 0x4;
2216 else
2217 ctrl_m_pg[2] &= ~0x4;
2218
2219 if (sdebug_ato)
2220 ctrl_m_pg[5] |= 0x80; /* ATO=1 */
2221
2222 memcpy(p, ctrl_m_pg, sizeof(ctrl_m_pg));
2223 if (1 == pcontrol)
2224 memcpy(p + 2, ch_ctrl_m_pg, sizeof(ch_ctrl_m_pg));
2225 else if (2 == pcontrol)
2226 memcpy(p, d_ctrl_m_pg, sizeof(d_ctrl_m_pg));
2227 return sizeof(ctrl_m_pg);
2228 }
2229
2230
2231 static int resp_iec_m_pg(unsigned char *p, int pcontrol, int target)
2232 { /* Informational Exceptions control mode page for mode_sense */
2233 unsigned char ch_iec_m_pg[] = {/* 0x1c, 0xa, */ 0x4, 0xf, 0, 0, 0, 0,
2234 0, 0, 0x0, 0x0};
2235 unsigned char d_iec_m_pg[] = {0x1c, 0xa, 0x08, 0, 0, 0, 0, 0,
2236 0, 0, 0x0, 0x0};
2237
2238 memcpy(p, iec_m_pg, sizeof(iec_m_pg));
2239 if (1 == pcontrol)
2240 memcpy(p + 2, ch_iec_m_pg, sizeof(ch_iec_m_pg));
2241 else if (2 == pcontrol)
2242 memcpy(p, d_iec_m_pg, sizeof(d_iec_m_pg));
2243 return sizeof(iec_m_pg);
2244 }
2245
2246 static int resp_sas_sf_m_pg(unsigned char *p, int pcontrol, int target)
2247 { /* SAS SSP mode page - short format for mode_sense */
2248 unsigned char sas_sf_m_pg[] = {0x19, 0x6,
2249 0x6, 0x0, 0x7, 0xd0, 0x0, 0x0};
2250
2251 memcpy(p, sas_sf_m_pg, sizeof(sas_sf_m_pg));
2252 if (1 == pcontrol)
2253 memset(p + 2, 0, sizeof(sas_sf_m_pg) - 2);
2254 return sizeof(sas_sf_m_pg);
2255 }
2256
2257
2258 static int resp_sas_pcd_m_spg(unsigned char *p, int pcontrol, int target,
2259 int target_dev_id)
2260 { /* SAS phy control and discover mode page for mode_sense */
2261 unsigned char sas_pcd_m_pg[] = {0x59, 0x1, 0, 0x64, 0, 0x6, 0, 2,
2262 0, 0, 0, 0, 0x10, 0x9, 0x8, 0x0,
2263 0, 0, 0, 0, 0, 0, 0, 0, /* insert SAS addr */
2264 0, 0, 0, 0, 0, 0, 0, 0, /* insert SAS addr */
2265 0x2, 0, 0, 0, 0, 0, 0, 0,
2266 0x88, 0x99, 0, 0, 0, 0, 0, 0,
2267 0, 0, 0, 0, 0, 0, 0, 0,
2268 0, 1, 0, 0, 0x10, 0x9, 0x8, 0x0,
2269 0, 0, 0, 0, 0, 0, 0, 0, /* insert SAS addr */
2270 0, 0, 0, 0, 0, 0, 0, 0, /* insert SAS addr */
2271 0x3, 0, 0, 0, 0, 0, 0, 0,
2272 0x88, 0x99, 0, 0, 0, 0, 0, 0,
2273 0, 0, 0, 0, 0, 0, 0, 0,
2274 };
2275 int port_a, port_b;
2276
2277 put_unaligned_be64(naa3_comp_a, sas_pcd_m_pg + 16);
2278 put_unaligned_be64(naa3_comp_c + 1, sas_pcd_m_pg + 24);
2279 put_unaligned_be64(naa3_comp_a, sas_pcd_m_pg + 64);
2280 put_unaligned_be64(naa3_comp_c + 1, sas_pcd_m_pg + 72);
2281 port_a = target_dev_id + 1;
2282 port_b = port_a + 1;
2283 memcpy(p, sas_pcd_m_pg, sizeof(sas_pcd_m_pg));
2284 put_unaligned_be32(port_a, p + 20);
2285 put_unaligned_be32(port_b, p + 48 + 20);
2286 if (1 == pcontrol)
2287 memset(p + 4, 0, sizeof(sas_pcd_m_pg) - 4);
2288 return sizeof(sas_pcd_m_pg);
2289 }
2290
2291 static int resp_sas_sha_m_spg(unsigned char *p, int pcontrol)
2292 { /* SAS SSP shared protocol specific port mode subpage */
2293 unsigned char sas_sha_m_pg[] = {0x59, 0x2, 0, 0xc, 0, 0x6, 0x10, 0,
2294 0, 0, 0, 0, 0, 0, 0, 0,
2295 };
2296
2297 memcpy(p, sas_sha_m_pg, sizeof(sas_sha_m_pg));
2298 if (1 == pcontrol)
2299 memset(p + 4, 0, sizeof(sas_sha_m_pg) - 4);
2300 return sizeof(sas_sha_m_pg);
2301 }
2302
2303 #define SDEBUG_MAX_MSENSE_SZ 256
2304
2305 static int resp_mode_sense(struct scsi_cmnd *scp,
2306 struct sdebug_dev_info *devip)
2307 {
2308 int pcontrol, pcode, subpcode, bd_len;
2309 unsigned char dev_spec;
2310 int alloc_len, offset, len, target_dev_id;
2311 int target = scp->device->id;
2312 unsigned char *ap;
2313 unsigned char arr[SDEBUG_MAX_MSENSE_SZ];
2314 unsigned char *cmd = scp->cmnd;
2315 bool dbd, llbaa, msense_6, is_disk, is_zbc, bad_pcode;
2316
2317 dbd = !!(cmd[1] & 0x8); /* disable block descriptors */
2318 pcontrol = (cmd[2] & 0xc0) >> 6;
2319 pcode = cmd[2] & 0x3f;
2320 subpcode = cmd[3];
2321 msense_6 = (MODE_SENSE == cmd[0]);
2322 llbaa = msense_6 ? false : !!(cmd[1] & 0x10);
2323 is_disk = (sdebug_ptype == TYPE_DISK);
2324 is_zbc = (devip->zmodel != BLK_ZONED_NONE);
2325 if ((is_disk || is_zbc) && !dbd)
2326 bd_len = llbaa ? 16 : 8;
2327 else
2328 bd_len = 0;
2329 alloc_len = msense_6 ? cmd[4] : get_unaligned_be16(cmd + 7);
2330 memset(arr, 0, SDEBUG_MAX_MSENSE_SZ);
2331 if (0x3 == pcontrol) { /* Saving values not supported */
2332 mk_sense_buffer(scp, ILLEGAL_REQUEST, SAVING_PARAMS_UNSUP, 0);
2333 return check_condition_result;
2334 }
2335 target_dev_id = ((devip->sdbg_host->shost->host_no + 1) * 2000) +
2336 (devip->target * 1000) - 3;
2337 /* for disks+zbc set DPOFUA bit and clear write protect (WP) bit */
2338 if (is_disk || is_zbc) {
2339 dev_spec = 0x10; /* =0x90 if WP=1 implies read-only */
2340 if (sdebug_wp)
2341 dev_spec |= 0x80;
2342 } else
2343 dev_spec = 0x0;
2344 if (msense_6) {
2345 arr[2] = dev_spec;
2346 arr[3] = bd_len;
2347 offset = 4;
2348 } else {
2349 arr[3] = dev_spec;
2350 if (16 == bd_len)
2351 arr[4] = 0x1; /* set LONGLBA bit */
2352 arr[7] = bd_len; /* assume 255 or less */
2353 offset = 8;
2354 }
2355 ap = arr + offset;
2356 if ((bd_len > 0) && (!sdebug_capacity))
2357 sdebug_capacity = get_sdebug_capacity();
2358
2359 if (8 == bd_len) {
2360 if (sdebug_capacity > 0xfffffffe)
2361 put_unaligned_be32(0xffffffff, ap + 0);
2362 else
2363 put_unaligned_be32(sdebug_capacity, ap + 0);
2364 put_unaligned_be16(sdebug_sector_size, ap + 6);
2365 offset += bd_len;
2366 ap = arr + offset;
2367 } else if (16 == bd_len) {
2368 put_unaligned_be64((u64)sdebug_capacity, ap + 0);
2369 put_unaligned_be32(sdebug_sector_size, ap + 12);
2370 offset += bd_len;
2371 ap = arr + offset;
2372 }
2373
2374 if ((subpcode > 0x0) && (subpcode < 0xff) && (0x19 != pcode)) {
2375 /* TODO: Control Extension page */
2376 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1);
2377 return check_condition_result;
2378 }
2379 bad_pcode = false;
2380
2381 switch (pcode) {
2382 case 0x1: /* Read-Write error recovery page, direct access */
2383 len = resp_err_recov_pg(ap, pcontrol, target);
2384 offset += len;
2385 break;
2386 case 0x2: /* Disconnect-Reconnect page, all devices */
2387 len = resp_disconnect_pg(ap, pcontrol, target);
2388 offset += len;
2389 break;
2390 case 0x3: /* Format device page, direct access */
2391 if (is_disk) {
2392 len = resp_format_pg(ap, pcontrol, target);
2393 offset += len;
2394 } else
2395 bad_pcode = true;
2396 break;
2397 case 0x8: /* Caching page, direct access */
2398 if (is_disk || is_zbc) {
2399 len = resp_caching_pg(ap, pcontrol, target);
2400 offset += len;
2401 } else
2402 bad_pcode = true;
2403 break;
2404 case 0xa: /* Control Mode page, all devices */
2405 len = resp_ctrl_m_pg(ap, pcontrol, target);
2406 offset += len;
2407 break;
2408 case 0x19: /* if spc==1 then sas phy, control+discover */
2409 if ((subpcode > 0x2) && (subpcode < 0xff)) {
2410 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1);
2411 return check_condition_result;
2412 }
2413 len = 0;
2414 if ((0x0 == subpcode) || (0xff == subpcode))
2415 len += resp_sas_sf_m_pg(ap + len, pcontrol, target);
2416 if ((0x1 == subpcode) || (0xff == subpcode))
2417 len += resp_sas_pcd_m_spg(ap + len, pcontrol, target,
2418 target_dev_id);
2419 if ((0x2 == subpcode) || (0xff == subpcode))
2420 len += resp_sas_sha_m_spg(ap + len, pcontrol);
2421 offset += len;
2422 break;
2423 case 0x1c: /* Informational Exceptions Mode page, all devices */
2424 len = resp_iec_m_pg(ap, pcontrol, target);
2425 offset += len;
2426 break;
2427 case 0x3f: /* Read all Mode pages */
2428 if ((0 == subpcode) || (0xff == subpcode)) {
2429 len = resp_err_recov_pg(ap, pcontrol, target);
2430 len += resp_disconnect_pg(ap + len, pcontrol, target);
2431 if (is_disk) {
2432 len += resp_format_pg(ap + len, pcontrol,
2433 target);
2434 len += resp_caching_pg(ap + len, pcontrol,
2435 target);
2436 } else if (is_zbc) {
2437 len += resp_caching_pg(ap + len, pcontrol,
2438 target);
2439 }
2440 len += resp_ctrl_m_pg(ap + len, pcontrol, target);
2441 len += resp_sas_sf_m_pg(ap + len, pcontrol, target);
2442 if (0xff == subpcode) {
2443 len += resp_sas_pcd_m_spg(ap + len, pcontrol,
2444 target, target_dev_id);
2445 len += resp_sas_sha_m_spg(ap + len, pcontrol);
2446 }
2447 len += resp_iec_m_pg(ap + len, pcontrol, target);
2448 offset += len;
2449 } else {
2450 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1);
2451 return check_condition_result;
2452 }
2453 break;
2454 default:
2455 bad_pcode = true;
2456 break;
2457 }
2458 if (bad_pcode) {
2459 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 5);
2460 return check_condition_result;
2461 }
2462 if (msense_6)
2463 arr[0] = offset - 1;
2464 else
2465 put_unaligned_be16((offset - 2), arr + 0);
2466 return fill_from_dev_buffer(scp, arr, min_t(int, alloc_len, offset));
2467 }
2468
2469 #define SDEBUG_MAX_MSELECT_SZ 512
2470
2471 static int resp_mode_select(struct scsi_cmnd *scp,
2472 struct sdebug_dev_info *devip)
2473 {
2474 int pf, sp, ps, md_len, bd_len, off, spf, pg_len;
2475 int param_len, res, mpage;
2476 unsigned char arr[SDEBUG_MAX_MSELECT_SZ];
2477 unsigned char *cmd = scp->cmnd;
2478 int mselect6 = (MODE_SELECT == cmd[0]);
2479
2480 memset(arr, 0, sizeof(arr));
2481 pf = cmd[1] & 0x10;
2482 sp = cmd[1] & 0x1;
2483 param_len = mselect6 ? cmd[4] : get_unaligned_be16(cmd + 7);
2484 if ((0 == pf) || sp || (param_len > SDEBUG_MAX_MSELECT_SZ)) {
2485 mk_sense_invalid_fld(scp, SDEB_IN_CDB, mselect6 ? 4 : 7, -1);
2486 return check_condition_result;
2487 }
2488 res = fetch_to_dev_buffer(scp, arr, param_len);
2489 if (-1 == res)
2490 return DID_ERROR << 16;
2491 else if (sdebug_verbose && (res < param_len))
2492 sdev_printk(KERN_INFO, scp->device,
2493 "%s: cdb indicated=%d, IO sent=%d bytes\n",
2494 __func__, param_len, res);
2495 md_len = mselect6 ? (arr[0] + 1) : (get_unaligned_be16(arr + 0) + 2);
2496 bd_len = mselect6 ? arr[3] : get_unaligned_be16(arr + 6);
2497 if (md_len > 2) {
2498 mk_sense_invalid_fld(scp, SDEB_IN_DATA, 0, -1);
2499 return check_condition_result;
2500 }
2501 off = bd_len + (mselect6 ? 4 : 8);
2502 mpage = arr[off] & 0x3f;
2503 ps = !!(arr[off] & 0x80);
2504 if (ps) {
2505 mk_sense_invalid_fld(scp, SDEB_IN_DATA, off, 7);
2506 return check_condition_result;
2507 }
2508 spf = !!(arr[off] & 0x40);
2509 pg_len = spf ? (get_unaligned_be16(arr + off + 2) + 4) :
2510 (arr[off + 1] + 2);
2511 if ((pg_len + off) > param_len) {
2512 mk_sense_buffer(scp, ILLEGAL_REQUEST,
2513 PARAMETER_LIST_LENGTH_ERR, 0);
2514 return check_condition_result;
2515 }
2516 switch (mpage) {
2517 case 0x8: /* Caching Mode page */
2518 if (caching_pg[1] == arr[off + 1]) {
2519 memcpy(caching_pg + 2, arr + off + 2,
2520 sizeof(caching_pg) - 2);
2521 goto set_mode_changed_ua;
2522 }
2523 break;
2524 case 0xa: /* Control Mode page */
2525 if (ctrl_m_pg[1] == arr[off + 1]) {
2526 memcpy(ctrl_m_pg + 2, arr + off + 2,
2527 sizeof(ctrl_m_pg) - 2);
2528 if (ctrl_m_pg[4] & 0x8)
2529 sdebug_wp = true;
2530 else
2531 sdebug_wp = false;
2532 sdebug_dsense = !!(ctrl_m_pg[2] & 0x4);
2533 goto set_mode_changed_ua;
2534 }
2535 break;
2536 case 0x1c: /* Informational Exceptions Mode page */
2537 if (iec_m_pg[1] == arr[off + 1]) {
2538 memcpy(iec_m_pg + 2, arr + off + 2,
2539 sizeof(iec_m_pg) - 2);
2540 goto set_mode_changed_ua;
2541 }
2542 break;
2543 default:
2544 break;
2545 }
2546 mk_sense_invalid_fld(scp, SDEB_IN_DATA, off, 5);
2547 return check_condition_result;
2548 set_mode_changed_ua:
2549 set_bit(SDEBUG_UA_MODE_CHANGED, devip->uas_bm);
2550 return 0;
2551 }
2552
2553 static int resp_temp_l_pg(unsigned char *arr)
2554 {
2555 unsigned char temp_l_pg[] = {0x0, 0x0, 0x3, 0x2, 0x0, 38,
2556 0x0, 0x1, 0x3, 0x2, 0x0, 65,
2557 };
2558
2559 memcpy(arr, temp_l_pg, sizeof(temp_l_pg));
2560 return sizeof(temp_l_pg);
2561 }
2562
2563 static int resp_ie_l_pg(unsigned char *arr)
2564 {
2565 unsigned char ie_l_pg[] = {0x0, 0x0, 0x3, 0x3, 0x0, 0x0, 38,
2566 };
2567
2568 memcpy(arr, ie_l_pg, sizeof(ie_l_pg));
2569 if (iec_m_pg[2] & 0x4) { /* TEST bit set */
2570 arr[4] = THRESHOLD_EXCEEDED;
2571 arr[5] = 0xff;
2572 }
2573 return sizeof(ie_l_pg);
2574 }
2575
2576 #define SDEBUG_MAX_LSENSE_SZ 512
2577
2578 static int resp_log_sense(struct scsi_cmnd *scp,
2579 struct sdebug_dev_info *devip)
2580 {
2581 int ppc, sp, pcode, subpcode, alloc_len, len, n;
2582 unsigned char arr[SDEBUG_MAX_LSENSE_SZ];
2583 unsigned char *cmd = scp->cmnd;
2584
2585 memset(arr, 0, sizeof(arr));
2586 ppc = cmd[1] & 0x2;
2587 sp = cmd[1] & 0x1;
2588 if (ppc || sp) {
2589 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, ppc ? 1 : 0);
2590 return check_condition_result;
2591 }
2592 pcode = cmd[2] & 0x3f;
2593 subpcode = cmd[3] & 0xff;
2594 alloc_len = get_unaligned_be16(cmd + 7);
2595 arr[0] = pcode;
2596 if (0 == subpcode) {
2597 switch (pcode) {
2598 case 0x0: /* Supported log pages log page */
2599 n = 4;
2600 arr[n++] = 0x0; /* this page */
2601 arr[n++] = 0xd; /* Temperature */
2602 arr[n++] = 0x2f; /* Informational exceptions */
2603 arr[3] = n - 4;
2604 break;
2605 case 0xd: /* Temperature log page */
2606 arr[3] = resp_temp_l_pg(arr + 4);
2607 break;
2608 case 0x2f: /* Informational exceptions log page */
2609 arr[3] = resp_ie_l_pg(arr + 4);
2610 break;
2611 default:
2612 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 5);
2613 return check_condition_result;
2614 }
2615 } else if (0xff == subpcode) {
2616 arr[0] |= 0x40;
2617 arr[1] = subpcode;
2618 switch (pcode) {
2619 case 0x0: /* Supported log pages and subpages log page */
2620 n = 4;
2621 arr[n++] = 0x0;
2622 arr[n++] = 0x0; /* 0,0 page */
2623 arr[n++] = 0x0;
2624 arr[n++] = 0xff; /* this page */
2625 arr[n++] = 0xd;
2626 arr[n++] = 0x0; /* Temperature */
2627 arr[n++] = 0x2f;
2628 arr[n++] = 0x0; /* Informational exceptions */
2629 arr[3] = n - 4;
2630 break;
2631 case 0xd: /* Temperature subpages */
2632 n = 4;
2633 arr[n++] = 0xd;
2634 arr[n++] = 0x0; /* Temperature */
2635 arr[3] = n - 4;
2636 break;
2637 case 0x2f: /* Informational exceptions subpages */
2638 n = 4;
2639 arr[n++] = 0x2f;
2640 arr[n++] = 0x0; /* Informational exceptions */
2641 arr[3] = n - 4;
2642 break;
2643 default:
2644 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 5);
2645 return check_condition_result;
2646 }
2647 } else {
2648 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1);
2649 return check_condition_result;
2650 }
2651 len = min_t(int, get_unaligned_be16(arr + 2) + 4, alloc_len);
2652 return fill_from_dev_buffer(scp, arr,
2653 min_t(int, len, SDEBUG_MAX_INQ_ARR_SZ));
2654 }
2655
2656 static inline bool sdebug_dev_is_zoned(struct sdebug_dev_info *devip)
2657 {
2658 return devip->nr_zones != 0;
2659 }
2660
2661 static struct sdeb_zone_state *zbc_zone(struct sdebug_dev_info *devip,
2662 unsigned long long lba)
2663 {
2664 return &devip->zstate[lba >> devip->zsize_shift];
2665 }
2666
2667 static inline bool zbc_zone_is_conv(struct sdeb_zone_state *zsp)
2668 {
2669 return zsp->z_type == ZBC_ZONE_TYPE_CNV;
2670 }
2671
2672 static void zbc_close_zone(struct sdebug_dev_info *devip,
2673 struct sdeb_zone_state *zsp)
2674 {
2675 enum sdebug_z_cond zc;
2676
2677 if (zbc_zone_is_conv(zsp))
2678 return;
2679
2680 zc = zsp->z_cond;
2681 if (!(zc == ZC2_IMPLICIT_OPEN || zc == ZC3_EXPLICIT_OPEN))
2682 return;
2683
2684 if (zc == ZC2_IMPLICIT_OPEN)
2685 devip->nr_imp_open--;
2686 else
2687 devip->nr_exp_open--;
2688
2689 if (zsp->z_wp == zsp->z_start) {
2690 zsp->z_cond = ZC1_EMPTY;
2691 } else {
2692 zsp->z_cond = ZC4_CLOSED;
2693 devip->nr_closed++;
2694 }
2695 }
2696
2697 static void zbc_close_imp_open_zone(struct sdebug_dev_info *devip)
2698 {
2699 struct sdeb_zone_state *zsp = &devip->zstate[0];
2700 unsigned int i;
2701
2702 for (i = 0; i < devip->nr_zones; i++, zsp++) {
2703 if (zsp->z_cond == ZC2_IMPLICIT_OPEN) {
2704 zbc_close_zone(devip, zsp);
2705 return;
2706 }
2707 }
2708 }
2709
2710 static void zbc_open_zone(struct sdebug_dev_info *devip,
2711 struct sdeb_zone_state *zsp, bool explicit)
2712 {
2713 enum sdebug_z_cond zc;
2714
2715 if (zbc_zone_is_conv(zsp))
2716 return;
2717
2718 zc = zsp->z_cond;
2719 if ((explicit && zc == ZC3_EXPLICIT_OPEN) ||
2720 (!explicit && zc == ZC2_IMPLICIT_OPEN))
2721 return;
2722
2723 /* Close an implicit open zone if necessary */
2724 if (explicit && zsp->z_cond == ZC2_IMPLICIT_OPEN)
2725 zbc_close_zone(devip, zsp);
2726 else if (devip->max_open &&
2727 devip->nr_imp_open + devip->nr_exp_open >= devip->max_open)
2728 zbc_close_imp_open_zone(devip);
2729
2730 if (zsp->z_cond == ZC4_CLOSED)
2731 devip->nr_closed--;
2732 if (explicit) {
2733 zsp->z_cond = ZC3_EXPLICIT_OPEN;
2734 devip->nr_exp_open++;
2735 } else {
2736 zsp->z_cond = ZC2_IMPLICIT_OPEN;
2737 devip->nr_imp_open++;
2738 }
2739 }
2740
2741 static void zbc_inc_wp(struct sdebug_dev_info *devip,
2742 unsigned long long lba, unsigned int num)
2743 {
2744 struct sdeb_zone_state *zsp = zbc_zone(devip, lba);
2745 unsigned long long n, end, zend = zsp->z_start + zsp->z_size;
2746
2747 if (zbc_zone_is_conv(zsp))
2748 return;
2749
2750 if (zsp->z_type == ZBC_ZONE_TYPE_SWR) {
2751 zsp->z_wp += num;
2752 if (zsp->z_wp >= zend)
2753 zsp->z_cond = ZC5_FULL;
2754 return;
2755 }
2756
2757 while (num) {
2758 if (lba != zsp->z_wp)
2759 zsp->z_non_seq_resource = true;
2760
2761 end = lba + num;
2762 if (end >= zend) {
2763 n = zend - lba;
2764 zsp->z_wp = zend;
2765 } else if (end > zsp->z_wp) {
2766 n = num;
2767 zsp->z_wp = end;
2768 } else {
2769 n = num;
2770 }
2771 if (zsp->z_wp >= zend)
2772 zsp->z_cond = ZC5_FULL;
2773
2774 num -= n;
2775 lba += n;
2776 if (num) {
2777 zsp++;
2778 zend = zsp->z_start + zsp->z_size;
2779 }
2780 }
2781 }
2782
2783 static int check_zbc_access_params(struct scsi_cmnd *scp,
2784 unsigned long long lba, unsigned int num, bool write)
2785 {
2786 struct scsi_device *sdp = scp->device;
2787 struct sdebug_dev_info *devip = (struct sdebug_dev_info *)sdp->hostdata;
2788 struct sdeb_zone_state *zsp = zbc_zone(devip, lba);
2789 struct sdeb_zone_state *zsp_end = zbc_zone(devip, lba + num - 1);
2790
2791 if (!write) {
2792 if (devip->zmodel == BLK_ZONED_HA)
2793 return 0;
2794 /* For host-managed, reads cannot cross zone types boundaries */
2795 if (zsp_end != zsp &&
2796 zbc_zone_is_conv(zsp) &&
2797 !zbc_zone_is_conv(zsp_end)) {
2798 mk_sense_buffer(scp, ILLEGAL_REQUEST,
2799 LBA_OUT_OF_RANGE,
2800 READ_INVDATA_ASCQ);
2801 return check_condition_result;
2802 }
2803 return 0;
2804 }
2805
2806 /* No restrictions for writes within conventional zones */
2807 if (zbc_zone_is_conv(zsp)) {
2808 if (!zbc_zone_is_conv(zsp_end)) {
2809 mk_sense_buffer(scp, ILLEGAL_REQUEST,
2810 LBA_OUT_OF_RANGE,
2811 WRITE_BOUNDARY_ASCQ);
2812 return check_condition_result;
2813 }
2814 return 0;
2815 }
2816
2817 if (zsp->z_type == ZBC_ZONE_TYPE_SWR) {
2818 /* Writes cannot cross sequential zone boundaries */
2819 if (zsp_end != zsp) {
2820 mk_sense_buffer(scp, ILLEGAL_REQUEST,
2821 LBA_OUT_OF_RANGE,
2822 WRITE_BOUNDARY_ASCQ);
2823 return check_condition_result;
2824 }
2825 /* Cannot write full zones */
2826 if (zsp->z_cond == ZC5_FULL) {
2827 mk_sense_buffer(scp, ILLEGAL_REQUEST,
2828 INVALID_FIELD_IN_CDB, 0);
2829 return check_condition_result;
2830 }
2831 /* Writes must be aligned to the zone WP */
2832 if (lba != zsp->z_wp) {
2833 mk_sense_buffer(scp, ILLEGAL_REQUEST,
2834 LBA_OUT_OF_RANGE,
2835 UNALIGNED_WRITE_ASCQ);
2836 return check_condition_result;
2837 }
2838 }
2839
2840 /* Handle implicit open of closed and empty zones */
2841 if (zsp->z_cond == ZC1_EMPTY || zsp->z_cond == ZC4_CLOSED) {
2842 if (devip->max_open &&
2843 devip->nr_exp_open >= devip->max_open) {
2844 mk_sense_buffer(scp, DATA_PROTECT,
2845 INSUFF_RES_ASC,
2846 INSUFF_ZONE_ASCQ);
2847 return check_condition_result;
2848 }
2849 zbc_open_zone(devip, zsp, false);
2850 }
2851
2852 return 0;
2853 }
2854
2855 static inline int check_device_access_params
2856 (struct scsi_cmnd *scp, unsigned long long lba,
2857 unsigned int num, bool write)
2858 {
2859 struct scsi_device *sdp = scp->device;
2860 struct sdebug_dev_info *devip = (struct sdebug_dev_info *)sdp->hostdata;
2861
2862 if (lba + num > sdebug_capacity) {
2863 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
2864 return check_condition_result;
2865 }
2866 /* transfer length excessive (tie in to block limits VPD page) */
2867 if (num > sdebug_store_sectors) {
2868 /* needs work to find which cdb byte 'num' comes from */
2869 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
2870 return check_condition_result;
2871 }
2872 if (write && unlikely(sdebug_wp)) {
2873 mk_sense_buffer(scp, DATA_PROTECT, WRITE_PROTECTED, 0x2);
2874 return check_condition_result;
2875 }
2876 if (sdebug_dev_is_zoned(devip))
2877 return check_zbc_access_params(scp, lba, num, write);
2878
2879 return 0;
2880 }
2881
2882 /*
2883 * Note: if BUG_ON() fires it usually indicates a problem with the parser
2884 * tables. Perhaps a missing F_FAKE_RW or FF_MEDIA_IO flag. Response functions
2885 * that access any of the "stores" in struct sdeb_store_info should call this
2886 * function with bug_if_fake_rw set to true.
2887 */
2888 static inline struct sdeb_store_info *devip2sip(struct sdebug_dev_info *devip,
2889 bool bug_if_fake_rw)
2890 {
2891 if (sdebug_fake_rw) {
2892 BUG_ON(bug_if_fake_rw); /* See note above */
2893 return NULL;
2894 }
2895 return xa_load(per_store_ap, devip->sdbg_host->si_idx);
2896 }
2897
2898 /* Returns number of bytes copied or -1 if error. */
2899 static int do_device_access(struct sdeb_store_info *sip, struct scsi_cmnd *scp,
2900 u32 sg_skip, u64 lba, u32 num, bool do_write)
2901 {
2902 int ret;
2903 u64 block, rest = 0;
2904 enum dma_data_direction dir;
2905 struct scsi_data_buffer *sdb = &scp->sdb;
2906 u8 *fsp;
2907
2908 if (do_write) {
2909 dir = DMA_TO_DEVICE;
2910 write_since_sync = true;
2911 } else {
2912 dir = DMA_FROM_DEVICE;
2913 }
2914
2915 if (!sdb->length || !sip)
2916 return 0;
2917 if (scp->sc_data_direction != dir)
2918 return -1;
2919 fsp = sip->storep;
2920
2921 block = do_div(lba, sdebug_store_sectors);
2922 if (block + num > sdebug_store_sectors)
2923 rest = block + num - sdebug_store_sectors;
2924
2925 ret = sg_copy_buffer(sdb->table.sgl, sdb->table.nents,
2926 fsp + (block * sdebug_sector_size),
2927 (num - rest) * sdebug_sector_size, sg_skip, do_write);
2928 if (ret != (num - rest) * sdebug_sector_size)
2929 return ret;
2930
2931 if (rest) {
2932 ret += sg_copy_buffer(sdb->table.sgl, sdb->table.nents,
2933 fsp, rest * sdebug_sector_size,
2934 sg_skip + ((num - rest) * sdebug_sector_size),
2935 do_write);
2936 }
2937
2938 return ret;
2939 }
2940
2941 /* Returns number of bytes copied or -1 if error. */
2942 static int do_dout_fetch(struct scsi_cmnd *scp, u32 num, u8 *doutp)
2943 {
2944 struct scsi_data_buffer *sdb = &scp->sdb;
2945
2946 if (!sdb->length)
2947 return 0;
2948 if (scp->sc_data_direction != DMA_TO_DEVICE)
2949 return -1;
2950 return sg_copy_buffer(sdb->table.sgl, sdb->table.nents, doutp,
2951 num * sdebug_sector_size, 0, true);
2952 }
2953
2954 /* If sip->storep+lba compares equal to arr(num), then copy top half of
2955 * arr into sip->storep+lba and return true. If comparison fails then
2956 * return false. */
2957 static bool comp_write_worker(struct sdeb_store_info *sip, u64 lba, u32 num,
2958 const u8 *arr, bool compare_only)
2959 {
2960 bool res;
2961 u64 block, rest = 0;
2962 u32 store_blks = sdebug_store_sectors;
2963 u32 lb_size = sdebug_sector_size;
2964 u8 *fsp = sip->storep;
2965
2966 block = do_div(lba, store_blks);
2967 if (block + num > store_blks)
2968 rest = block + num - store_blks;
2969
2970 res = !memcmp(fsp + (block * lb_size), arr, (num - rest) * lb_size);
2971 if (!res)
2972 return res;
2973 if (rest)
2974 res = memcmp(fsp, arr + ((num - rest) * lb_size),
2975 rest * lb_size);
2976 if (!res)
2977 return res;
2978 if (compare_only)
2979 return true;
2980 arr += num * lb_size;
2981 memcpy(fsp + (block * lb_size), arr, (num - rest) * lb_size);
2982 if (rest)
2983 memcpy(fsp, arr + ((num - rest) * lb_size), rest * lb_size);
2984 return res;
2985 }
2986
2987 static __be16 dif_compute_csum(const void *buf, int len)
2988 {
2989 __be16 csum;
2990
2991 if (sdebug_guard)
2992 csum = (__force __be16)ip_compute_csum(buf, len);
2993 else
2994 csum = cpu_to_be16(crc_t10dif(buf, len));
2995
2996 return csum;
2997 }
2998
2999 static int dif_verify(struct t10_pi_tuple *sdt, const void *data,
3000 sector_t sector, u32 ei_lba)
3001 {
3002 __be16 csum = dif_compute_csum(data, sdebug_sector_size);
3003
3004 if (sdt->guard_tag != csum) {
3005 pr_err("GUARD check failed on sector %lu rcvd 0x%04x, data 0x%04x\n",
3006 (unsigned long)sector,
3007 be16_to_cpu(sdt->guard_tag),
3008 be16_to_cpu(csum));
3009 return 0x01;
3010 }
3011 if (sdebug_dif == T10_PI_TYPE1_PROTECTION &&
3012 be32_to_cpu(sdt->ref_tag) != (sector & 0xffffffff)) {
3013 pr_err("REF check failed on sector %lu\n",
3014 (unsigned long)sector);
3015 return 0x03;
3016 }
3017 if (sdebug_dif == T10_PI_TYPE2_PROTECTION &&
3018 be32_to_cpu(sdt->ref_tag) != ei_lba) {
3019 pr_err("REF check failed on sector %lu\n",
3020 (unsigned long)sector);
3021 return 0x03;
3022 }
3023 return 0;
3024 }
3025
3026 static void dif_copy_prot(struct scsi_cmnd *scp, sector_t sector,
3027 unsigned int sectors, bool read)
3028 {
3029 size_t resid;
3030 void *paddr;
3031 struct sdeb_store_info *sip = devip2sip((struct sdebug_dev_info *)
3032 scp->device->hostdata, true);
3033 struct t10_pi_tuple *dif_storep = sip->dif_storep;
3034 const void *dif_store_end = dif_storep + sdebug_store_sectors;
3035 struct sg_mapping_iter miter;
3036
3037 /* Bytes of protection data to copy into sgl */
3038 resid = sectors * sizeof(*dif_storep);
3039
3040 sg_miter_start(&miter, scsi_prot_sglist(scp),
3041 scsi_prot_sg_count(scp), SG_MITER_ATOMIC |
3042 (read ? SG_MITER_TO_SG : SG_MITER_FROM_SG));
3043
3044 while (sg_miter_next(&miter) && resid > 0) {
3045 size_t len = min_t(size_t, miter.length, resid);
3046 void *start = dif_store(sip, sector);
3047 size_t rest = 0;
3048
3049 if (dif_store_end < start + len)
3050 rest = start + len - dif_store_end;
3051
3052 paddr = miter.addr;
3053
3054 if (read)
3055 memcpy(paddr, start, len - rest);
3056 else
3057 memcpy(start, paddr, len - rest);
3058
3059 if (rest) {
3060 if (read)
3061 memcpy(paddr + len - rest, dif_storep, rest);
3062 else
3063 memcpy(dif_storep, paddr + len - rest, rest);
3064 }
3065
3066 sector += len / sizeof(*dif_storep);
3067 resid -= len;
3068 }
3069 sg_miter_stop(&miter);
3070 }
3071
3072 static int prot_verify_read(struct scsi_cmnd *scp, sector_t start_sec,
3073 unsigned int sectors, u32 ei_lba)
3074 {
3075 unsigned int i;
3076 sector_t sector;
3077 struct sdeb_store_info *sip = devip2sip((struct sdebug_dev_info *)
3078 scp->device->hostdata, true);
3079 struct t10_pi_tuple *sdt;
3080
3081 for (i = 0; i < sectors; i++, ei_lba++) {
3082 int ret;
3083
3084 sector = start_sec + i;
3085 sdt = dif_store(sip, sector);
3086
3087 if (sdt->app_tag == cpu_to_be16(0xffff))
3088 continue;
3089
3090 ret = dif_verify(sdt, lba2fake_store(sip, sector), sector,
3091 ei_lba);
3092 if (ret) {
3093 dif_errors++;
3094 return ret;
3095 }
3096 }
3097
3098 dif_copy_prot(scp, start_sec, sectors, true);
3099 dix_reads++;
3100
3101 return 0;
3102 }
3103
3104 static int resp_read_dt0(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
3105 {
3106 bool check_prot;
3107 u32 num;
3108 u32 ei_lba;
3109 int ret;
3110 u64 lba;
3111 struct sdeb_store_info *sip = devip2sip(devip, true);
3112 rwlock_t *macc_lckp = sip ? &sip->macc_lck : &sdeb_fake_rw_lck;
3113 u8 *cmd = scp->cmnd;
3114
3115 switch (cmd[0]) {
3116 case READ_16:
3117 ei_lba = 0;
3118 lba = get_unaligned_be64(cmd + 2);
3119 num = get_unaligned_be32(cmd + 10);
3120 check_prot = true;
3121 break;
3122 case READ_10:
3123 ei_lba = 0;
3124 lba = get_unaligned_be32(cmd + 2);
3125 num = get_unaligned_be16(cmd + 7);
3126 check_prot = true;
3127 break;
3128 case READ_6:
3129 ei_lba = 0;
3130 lba = (u32)cmd[3] | (u32)cmd[2] << 8 |
3131 (u32)(cmd[1] & 0x1f) << 16;
3132 num = (0 == cmd[4]) ? 256 : cmd[4];
3133 check_prot = true;
3134 break;
3135 case READ_12:
3136 ei_lba = 0;
3137 lba = get_unaligned_be32(cmd + 2);
3138 num = get_unaligned_be32(cmd + 6);
3139 check_prot = true;
3140 break;
3141 case XDWRITEREAD_10:
3142 ei_lba = 0;
3143 lba = get_unaligned_be32(cmd + 2);
3144 num = get_unaligned_be16(cmd + 7);
3145 check_prot = false;
3146 break;
3147 default: /* assume READ(32) */
3148 lba = get_unaligned_be64(cmd + 12);
3149 ei_lba = get_unaligned_be32(cmd + 20);
3150 num = get_unaligned_be32(cmd + 28);
3151 check_prot = false;
3152 break;
3153 }
3154 if (unlikely(have_dif_prot && check_prot)) {
3155 if (sdebug_dif == T10_PI_TYPE2_PROTECTION &&
3156 (cmd[1] & 0xe0)) {
3157 mk_sense_invalid_opcode(scp);
3158 return check_condition_result;
3159 }
3160 if ((sdebug_dif == T10_PI_TYPE1_PROTECTION ||
3161 sdebug_dif == T10_PI_TYPE3_PROTECTION) &&
3162 (cmd[1] & 0xe0) == 0)
3163 sdev_printk(KERN_ERR, scp->device, "Unprotected RD "
3164 "to DIF device\n");
3165 }
3166 if (unlikely((sdebug_opts & SDEBUG_OPT_SHORT_TRANSFER) &&
3167 atomic_read(&sdeb_inject_pending))) {
3168 num /= 2;
3169 atomic_set(&sdeb_inject_pending, 0);
3170 }
3171
3172 ret = check_device_access_params(scp, lba, num, false);
3173 if (ret)
3174 return ret;
3175 if (unlikely((SDEBUG_OPT_MEDIUM_ERR & sdebug_opts) &&
3176 (lba <= (sdebug_medium_error_start + sdebug_medium_error_count - 1)) &&
3177 ((lba + num) > sdebug_medium_error_start))) {
3178 /* claim unrecoverable read error */
3179 mk_sense_buffer(scp, MEDIUM_ERROR, UNRECOVERED_READ_ERR, 0);
3180 /* set info field and valid bit for fixed descriptor */
3181 if (0x70 == (scp->sense_buffer[0] & 0x7f)) {
3182 scp->sense_buffer[0] |= 0x80; /* Valid bit */
3183 ret = (lba < OPT_MEDIUM_ERR_ADDR)
3184 ? OPT_MEDIUM_ERR_ADDR : (int)lba;
3185 put_unaligned_be32(ret, scp->sense_buffer + 3);
3186 }
3187 scsi_set_resid(scp, scsi_bufflen(scp));
3188 return check_condition_result;
3189 }
3190
3191 read_lock(macc_lckp);
3192
3193 /* DIX + T10 DIF */
3194 if (unlikely(sdebug_dix && scsi_prot_sg_count(scp))) {
3195 int prot_ret = prot_verify_read(scp, lba, num, ei_lba);
3196
3197 if (prot_ret) {
3198 read_unlock(macc_lckp);
3199 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, prot_ret);
3200 return illegal_condition_result;
3201 }
3202 }
3203
3204 ret = do_device_access(sip, scp, 0, lba, num, false);
3205 read_unlock(macc_lckp);
3206 if (unlikely(ret == -1))
3207 return DID_ERROR << 16;
3208
3209 scsi_set_resid(scp, scsi_bufflen(scp) - ret);
3210
3211 if (unlikely((sdebug_opts & SDEBUG_OPT_RECOV_DIF_DIX) &&
3212 atomic_read(&sdeb_inject_pending))) {
3213 if (sdebug_opts & SDEBUG_OPT_RECOVERED_ERR) {
3214 mk_sense_buffer(scp, RECOVERED_ERROR, THRESHOLD_EXCEEDED, 0);
3215 atomic_set(&sdeb_inject_pending, 0);
3216 return check_condition_result;
3217 } else if (sdebug_opts & SDEBUG_OPT_DIF_ERR) {
3218 /* Logical block guard check failed */
3219 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 1);
3220 atomic_set(&sdeb_inject_pending, 0);
3221 return illegal_condition_result;
3222 } else if (SDEBUG_OPT_DIX_ERR & sdebug_opts) {
3223 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 1);
3224 atomic_set(&sdeb_inject_pending, 0);
3225 return illegal_condition_result;
3226 }
3227 }
3228 return 0;
3229 }
3230
3231 static void dump_sector(unsigned char *buf, int len)
3232 {
3233 int i, j, n;
3234
3235 pr_err(">>> Sector Dump <<<\n");
3236 for (i = 0 ; i < len ; i += 16) {
3237 char b[128];
3238
3239 for (j = 0, n = 0; j < 16; j++) {
3240 unsigned char c = buf[i+j];
3241
3242 if (c >= 0x20 && c < 0x7e)
3243 n += scnprintf(b + n, sizeof(b) - n,
3244 " %c ", buf[i+j]);
3245 else
3246 n += scnprintf(b + n, sizeof(b) - n,
3247 "%02x ", buf[i+j]);
3248 }
3249 pr_err("%04d: %s\n", i, b);
3250 }
3251 }
3252
3253 static int prot_verify_write(struct scsi_cmnd *SCpnt, sector_t start_sec,
3254 unsigned int sectors, u32 ei_lba)
3255 {
3256 int ret;
3257 struct t10_pi_tuple *sdt;
3258 void *daddr;
3259 sector_t sector = start_sec;
3260 int ppage_offset;
3261 int dpage_offset;
3262 struct sg_mapping_iter diter;
3263 struct sg_mapping_iter piter;
3264
3265 BUG_ON(scsi_sg_count(SCpnt) == 0);
3266 BUG_ON(scsi_prot_sg_count(SCpnt) == 0);
3267
3268 sg_miter_start(&piter, scsi_prot_sglist(SCpnt),
3269 scsi_prot_sg_count(SCpnt),
3270 SG_MITER_ATOMIC | SG_MITER_FROM_SG);
3271 sg_miter_start(&diter, scsi_sglist(SCpnt), scsi_sg_count(SCpnt),
3272 SG_MITER_ATOMIC | SG_MITER_FROM_SG);
3273
3274 /* For each protection page */
3275 while (sg_miter_next(&piter)) {
3276 dpage_offset = 0;
3277 if (WARN_ON(!sg_miter_next(&diter))) {
3278 ret = 0x01;
3279 goto out;
3280 }
3281
3282 for (ppage_offset = 0; ppage_offset < piter.length;
3283 ppage_offset += sizeof(struct t10_pi_tuple)) {
3284 /* If we're at the end of the current
3285 * data page advance to the next one
3286 */
3287 if (dpage_offset >= diter.length) {
3288 if (WARN_ON(!sg_miter_next(&diter))) {
3289 ret = 0x01;
3290 goto out;
3291 }
3292 dpage_offset = 0;
3293 }
3294
3295 sdt = piter.addr + ppage_offset;
3296 daddr = diter.addr + dpage_offset;
3297
3298 ret = dif_verify(sdt, daddr, sector, ei_lba);
3299 if (ret) {
3300 dump_sector(daddr, sdebug_sector_size);
3301 goto out;
3302 }
3303
3304 sector++;
3305 ei_lba++;
3306 dpage_offset += sdebug_sector_size;
3307 }
3308 diter.consumed = dpage_offset;
3309 sg_miter_stop(&diter);
3310 }
3311 sg_miter_stop(&piter);
3312
3313 dif_copy_prot(SCpnt, start_sec, sectors, false);
3314 dix_writes++;
3315
3316 return 0;
3317
3318 out:
3319 dif_errors++;
3320 sg_miter_stop(&diter);
3321 sg_miter_stop(&piter);
3322 return ret;
3323 }
3324
3325 static unsigned long lba_to_map_index(sector_t lba)
3326 {
3327 if (sdebug_unmap_alignment)
3328 lba += sdebug_unmap_granularity - sdebug_unmap_alignment;
3329 sector_div(lba, sdebug_unmap_granularity);
3330 return lba;
3331 }
3332
3333 static sector_t map_index_to_lba(unsigned long index)
3334 {
3335 sector_t lba = index * sdebug_unmap_granularity;
3336
3337 if (sdebug_unmap_alignment)
3338 lba -= sdebug_unmap_granularity - sdebug_unmap_alignment;
3339 return lba;
3340 }
3341
3342 static unsigned int map_state(struct sdeb_store_info *sip, sector_t lba,
3343 unsigned int *num)
3344 {
3345 sector_t end;
3346 unsigned int mapped;
3347 unsigned long index;
3348 unsigned long next;
3349
3350 index = lba_to_map_index(lba);
3351 mapped = test_bit(index, sip->map_storep);
3352
3353 if (mapped)
3354 next = find_next_zero_bit(sip->map_storep, map_size, index);
3355 else
3356 next = find_next_bit(sip->map_storep, map_size, index);
3357
3358 end = min_t(sector_t, sdebug_store_sectors, map_index_to_lba(next));
3359 *num = end - lba;
3360 return mapped;
3361 }
3362
3363 static void map_region(struct sdeb_store_info *sip, sector_t lba,
3364 unsigned int len)
3365 {
3366 sector_t end = lba + len;
3367
3368 while (lba < end) {
3369 unsigned long index = lba_to_map_index(lba);
3370
3371 if (index < map_size)
3372 set_bit(index, sip->map_storep);
3373
3374 lba = map_index_to_lba(index + 1);
3375 }
3376 }
3377
3378 static void unmap_region(struct sdeb_store_info *sip, sector_t lba,
3379 unsigned int len)
3380 {
3381 sector_t end = lba + len;
3382 u8 *fsp = sip->storep;
3383
3384 while (lba < end) {
3385 unsigned long index = lba_to_map_index(lba);
3386
3387 if (lba == map_index_to_lba(index) &&
3388 lba + sdebug_unmap_granularity <= end &&
3389 index < map_size) {
3390 clear_bit(index, sip->map_storep);
3391 if (sdebug_lbprz) { /* for LBPRZ=2 return 0xff_s */
3392 memset(fsp + lba * sdebug_sector_size,
3393 (sdebug_lbprz & 1) ? 0 : 0xff,
3394 sdebug_sector_size *
3395 sdebug_unmap_granularity);
3396 }
3397 if (sip->dif_storep) {
3398 memset(sip->dif_storep + lba, 0xff,
3399 sizeof(*sip->dif_storep) *
3400 sdebug_unmap_granularity);
3401 }
3402 }
3403 lba = map_index_to_lba(index + 1);
3404 }
3405 }
3406
3407 static int resp_write_dt0(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
3408 {
3409 bool check_prot;
3410 u32 num;
3411 u32 ei_lba;
3412 int ret;
3413 u64 lba;
3414 struct sdeb_store_info *sip = devip2sip(devip, true);
3415 rwlock_t *macc_lckp = &sip->macc_lck;
3416 u8 *cmd = scp->cmnd;
3417
3418 switch (cmd[0]) {
3419 case WRITE_16:
3420 ei_lba = 0;
3421 lba = get_unaligned_be64(cmd + 2);
3422 num = get_unaligned_be32(cmd + 10);
3423 check_prot = true;
3424 break;
3425 case WRITE_10:
3426 ei_lba = 0;
3427 lba = get_unaligned_be32(cmd + 2);
3428 num = get_unaligned_be16(cmd + 7);
3429 check_prot = true;
3430 break;
3431 case WRITE_6:
3432 ei_lba = 0;
3433 lba = (u32)cmd[3] | (u32)cmd[2] << 8 |
3434 (u32)(cmd[1] & 0x1f) << 16;
3435 num = (0 == cmd[4]) ? 256 : cmd[4];
3436 check_prot = true;
3437 break;
3438 case WRITE_12:
3439 ei_lba = 0;
3440 lba = get_unaligned_be32(cmd + 2);
3441 num = get_unaligned_be32(cmd + 6);
3442 check_prot = true;
3443 break;
3444 case 0x53: /* XDWRITEREAD(10) */
3445 ei_lba = 0;
3446 lba = get_unaligned_be32(cmd + 2);
3447 num = get_unaligned_be16(cmd + 7);
3448 check_prot = false;
3449 break;
3450 default: /* assume WRITE(32) */
3451 lba = get_unaligned_be64(cmd + 12);
3452 ei_lba = get_unaligned_be32(cmd + 20);
3453 num = get_unaligned_be32(cmd + 28);
3454 check_prot = false;
3455 break;
3456 }
3457 if (unlikely(have_dif_prot && check_prot)) {
3458 if (sdebug_dif == T10_PI_TYPE2_PROTECTION &&
3459 (cmd[1] & 0xe0)) {
3460 mk_sense_invalid_opcode(scp);
3461 return check_condition_result;
3462 }
3463 if ((sdebug_dif == T10_PI_TYPE1_PROTECTION ||
3464 sdebug_dif == T10_PI_TYPE3_PROTECTION) &&
3465 (cmd[1] & 0xe0) == 0)
3466 sdev_printk(KERN_ERR, scp->device, "Unprotected WR "
3467 "to DIF device\n");
3468 }
3469
3470 write_lock(macc_lckp);
3471 ret = check_device_access_params(scp, lba, num, true);
3472 if (ret) {
3473 write_unlock(macc_lckp);
3474 return ret;
3475 }
3476
3477 /* DIX + T10 DIF */
3478 if (unlikely(sdebug_dix && scsi_prot_sg_count(scp))) {
3479 int prot_ret = prot_verify_write(scp, lba, num, ei_lba);
3480
3481 if (prot_ret) {
3482 write_unlock(macc_lckp);
3483 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, prot_ret);
3484 return illegal_condition_result;
3485 }
3486 }
3487
3488 ret = do_device_access(sip, scp, 0, lba, num, true);
3489 if (unlikely(scsi_debug_lbp()))
3490 map_region(sip, lba, num);
3491 /* If ZBC zone then bump its write pointer */
3492 if (sdebug_dev_is_zoned(devip))
3493 zbc_inc_wp(devip, lba, num);
3494 write_unlock(macc_lckp);
3495 if (unlikely(-1 == ret))
3496 return DID_ERROR << 16;
3497 else if (unlikely(sdebug_verbose &&
3498 (ret < (num * sdebug_sector_size))))
3499 sdev_printk(KERN_INFO, scp->device,
3500 "%s: write: cdb indicated=%u, IO sent=%d bytes\n",
3501 my_name, num * sdebug_sector_size, ret);
3502
3503 if (unlikely((sdebug_opts & SDEBUG_OPT_RECOV_DIF_DIX) &&
3504 atomic_read(&sdeb_inject_pending))) {
3505 if (sdebug_opts & SDEBUG_OPT_RECOVERED_ERR) {
3506 mk_sense_buffer(scp, RECOVERED_ERROR, THRESHOLD_EXCEEDED, 0);
3507 atomic_set(&sdeb_inject_pending, 0);
3508 return check_condition_result;
3509 } else if (sdebug_opts & SDEBUG_OPT_DIF_ERR) {
3510 /* Logical block guard check failed */
3511 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 1);
3512 atomic_set(&sdeb_inject_pending, 0);
3513 return illegal_condition_result;
3514 } else if (sdebug_opts & SDEBUG_OPT_DIX_ERR) {
3515 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 1);
3516 atomic_set(&sdeb_inject_pending, 0);
3517 return illegal_condition_result;
3518 }
3519 }
3520 return 0;
3521 }
3522
3523 /*
3524 * T10 has only specified WRITE SCATTERED(16) and WRITE SCATTERED(32).
3525 * No READ GATHERED yet (requires bidi or long cdb holding gather list).
3526 */
3527 static int resp_write_scat(struct scsi_cmnd *scp,
3528 struct sdebug_dev_info *devip)
3529 {
3530 u8 *cmd = scp->cmnd;
3531 u8 *lrdp = NULL;
3532 u8 *up;
3533 struct sdeb_store_info *sip = devip2sip(devip, true);
3534 rwlock_t *macc_lckp = &sip->macc_lck;
3535 u8 wrprotect;
3536 u16 lbdof, num_lrd, k;
3537 u32 num, num_by, bt_len, lbdof_blen, sg_off, cum_lb;
3538 u32 lb_size = sdebug_sector_size;
3539 u32 ei_lba;
3540 u64 lba;
3541 int ret, res;
3542 bool is_16;
3543 static const u32 lrd_size = 32; /* + parameter list header size */
3544
3545 if (cmd[0] == VARIABLE_LENGTH_CMD) {
3546 is_16 = false;
3547 wrprotect = (cmd[10] >> 5) & 0x7;
3548 lbdof = get_unaligned_be16(cmd + 12);
3549 num_lrd = get_unaligned_be16(cmd + 16);
3550 bt_len = get_unaligned_be32(cmd + 28);
3551 } else { /* that leaves WRITE SCATTERED(16) */
3552 is_16 = true;
3553 wrprotect = (cmd[2] >> 5) & 0x7;
3554 lbdof = get_unaligned_be16(cmd + 4);
3555 num_lrd = get_unaligned_be16(cmd + 8);
3556 bt_len = get_unaligned_be32(cmd + 10);
3557 if (unlikely(have_dif_prot)) {
3558 if (sdebug_dif == T10_PI_TYPE2_PROTECTION &&
3559 wrprotect) {
3560 mk_sense_invalid_opcode(scp);
3561 return illegal_condition_result;
3562 }
3563 if ((sdebug_dif == T10_PI_TYPE1_PROTECTION ||
3564 sdebug_dif == T10_PI_TYPE3_PROTECTION) &&
3565 wrprotect == 0)
3566 sdev_printk(KERN_ERR, scp->device,
3567 "Unprotected WR to DIF device\n");
3568 }
3569 }
3570 if ((num_lrd == 0) || (bt_len == 0))
3571 return 0; /* T10 says these do-nothings are not errors */
3572 if (lbdof == 0) {
3573 if (sdebug_verbose)
3574 sdev_printk(KERN_INFO, scp->device,
3575 "%s: %s: LB Data Offset field bad\n",
3576 my_name, __func__);
3577 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
3578 return illegal_condition_result;
3579 }
3580 lbdof_blen = lbdof * lb_size;
3581 if ((lrd_size + (num_lrd * lrd_size)) > lbdof_blen) {
3582 if (sdebug_verbose)
3583 sdev_printk(KERN_INFO, scp->device,
3584 "%s: %s: LBA range descriptors don't fit\n",
3585 my_name, __func__);
3586 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
3587 return illegal_condition_result;
3588 }
3589 lrdp = kzalloc(lbdof_blen, GFP_ATOMIC);
3590 if (lrdp == NULL)
3591 return SCSI_MLQUEUE_HOST_BUSY;
3592 if (sdebug_verbose)
3593 sdev_printk(KERN_INFO, scp->device,
3594 "%s: %s: Fetch header+scatter_list, lbdof_blen=%u\n",
3595 my_name, __func__, lbdof_blen);
3596 res = fetch_to_dev_buffer(scp, lrdp, lbdof_blen);
3597 if (res == -1) {
3598 ret = DID_ERROR << 16;
3599 goto err_out;
3600 }
3601
3602 write_lock(macc_lckp);
3603 sg_off = lbdof_blen;
3604 /* Spec says Buffer xfer Length field in number of LBs in dout */
3605 cum_lb = 0;
3606 for (k = 0, up = lrdp + lrd_size; k < num_lrd; ++k, up += lrd_size) {
3607 lba = get_unaligned_be64(up + 0);
3608 num = get_unaligned_be32(up + 8);
3609 if (sdebug_verbose)
3610 sdev_printk(KERN_INFO, scp->device,
3611 "%s: %s: k=%d LBA=0x%llx num=%u sg_off=%u\n",
3612 my_name, __func__, k, lba, num, sg_off);
3613 if (num == 0)
3614 continue;
3615 ret = check_device_access_params(scp, lba, num, true);
3616 if (ret)
3617 goto err_out_unlock;
3618 num_by = num * lb_size;
3619 ei_lba = is_16 ? 0 : get_unaligned_be32(up + 12);
3620
3621 if ((cum_lb + num) > bt_len) {
3622 if (sdebug_verbose)
3623 sdev_printk(KERN_INFO, scp->device,
3624 "%s: %s: sum of blocks > data provided\n",
3625 my_name, __func__);
3626 mk_sense_buffer(scp, ILLEGAL_REQUEST, WRITE_ERROR_ASC,
3627 0);
3628 ret = illegal_condition_result;
3629 goto err_out_unlock;
3630 }
3631
3632 /* DIX + T10 DIF */
3633 if (unlikely(sdebug_dix && scsi_prot_sg_count(scp))) {
3634 int prot_ret = prot_verify_write(scp, lba, num,
3635 ei_lba);
3636
3637 if (prot_ret) {
3638 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10,
3639 prot_ret);
3640 ret = illegal_condition_result;
3641 goto err_out_unlock;
3642 }
3643 }
3644
3645 ret = do_device_access(sip, scp, sg_off, lba, num, true);
3646 /* If ZBC zone then bump its write pointer */
3647 if (sdebug_dev_is_zoned(devip))
3648 zbc_inc_wp(devip, lba, num);
3649 if (unlikely(scsi_debug_lbp()))
3650 map_region(sip, lba, num);
3651 if (unlikely(-1 == ret)) {
3652 ret = DID_ERROR << 16;
3653 goto err_out_unlock;
3654 } else if (unlikely(sdebug_verbose && (ret < num_by)))
3655 sdev_printk(KERN_INFO, scp->device,
3656 "%s: write: cdb indicated=%u, IO sent=%d bytes\n",
3657 my_name, num_by, ret);
3658
3659 if (unlikely((sdebug_opts & SDEBUG_OPT_RECOV_DIF_DIX) &&
3660 atomic_read(&sdeb_inject_pending))) {
3661 if (sdebug_opts & SDEBUG_OPT_RECOVERED_ERR) {
3662 mk_sense_buffer(scp, RECOVERED_ERROR, THRESHOLD_EXCEEDED, 0);
3663 atomic_set(&sdeb_inject_pending, 0);
3664 ret = check_condition_result;
3665 goto err_out_unlock;
3666 } else if (sdebug_opts & SDEBUG_OPT_DIF_ERR) {
3667 /* Logical block guard check failed */
3668 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 1);
3669 atomic_set(&sdeb_inject_pending, 0);
3670 ret = illegal_condition_result;
3671 goto err_out_unlock;
3672 } else if (sdebug_opts & SDEBUG_OPT_DIX_ERR) {
3673 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 1);
3674 atomic_set(&sdeb_inject_pending, 0);
3675 ret = illegal_condition_result;
3676 goto err_out_unlock;
3677 }
3678 }
3679 sg_off += num_by;
3680 cum_lb += num;
3681 }
3682 ret = 0;
3683 err_out_unlock:
3684 write_unlock(macc_lckp);
3685 err_out:
3686 kfree(lrdp);
3687 return ret;
3688 }
3689
3690 static int resp_write_same(struct scsi_cmnd *scp, u64 lba, u32 num,
3691 u32 ei_lba, bool unmap, bool ndob)
3692 {
3693 struct scsi_device *sdp = scp->device;
3694 struct sdebug_dev_info *devip = (struct sdebug_dev_info *)sdp->hostdata;
3695 unsigned long long i;
3696 u64 block, lbaa;
3697 u32 lb_size = sdebug_sector_size;
3698 int ret;
3699 struct sdeb_store_info *sip = devip2sip((struct sdebug_dev_info *)
3700 scp->device->hostdata, true);
3701 rwlock_t *macc_lckp = &sip->macc_lck;
3702 u8 *fs1p;
3703 u8 *fsp;
3704
3705 write_lock(macc_lckp);
3706
3707 ret = check_device_access_params(scp, lba, num, true);
3708 if (ret) {
3709 write_unlock(macc_lckp);
3710 return ret;
3711 }
3712
3713 if (unmap && scsi_debug_lbp()) {
3714 unmap_region(sip, lba, num);
3715 goto out;
3716 }
3717 lbaa = lba;
3718 block = do_div(lbaa, sdebug_store_sectors);
3719 /* if ndob then zero 1 logical block, else fetch 1 logical block */
3720 fsp = sip->storep;
3721 fs1p = fsp + (block * lb_size);
3722 if (ndob) {
3723 memset(fs1p, 0, lb_size);
3724 ret = 0;
3725 } else
3726 ret = fetch_to_dev_buffer(scp, fs1p, lb_size);
3727
3728 if (-1 == ret) {
3729 write_unlock(&sip->macc_lck);
3730 return DID_ERROR << 16;
3731 } else if (sdebug_verbose && !ndob && (ret < lb_size))
3732 sdev_printk(KERN_INFO, scp->device,
3733 "%s: %s: lb size=%u, IO sent=%d bytes\n",
3734 my_name, "write same", lb_size, ret);
3735
3736 /* Copy first sector to remaining blocks */
3737 for (i = 1 ; i < num ; i++) {
3738 lbaa = lba + i;
3739 block = do_div(lbaa, sdebug_store_sectors);
3740 memmove(fsp + (block * lb_size), fs1p, lb_size);
3741 }
3742 if (scsi_debug_lbp())
3743 map_region(sip, lba, num);
3744 /* If ZBC zone then bump its write pointer */
3745 if (sdebug_dev_is_zoned(devip))
3746 zbc_inc_wp(devip, lba, num);
3747 out:
3748 write_unlock(macc_lckp);
3749
3750 return 0;
3751 }
3752
3753 static int resp_write_same_10(struct scsi_cmnd *scp,
3754 struct sdebug_dev_info *devip)
3755 {
3756 u8 *cmd = scp->cmnd;
3757 u32 lba;
3758 u16 num;
3759 u32 ei_lba = 0;
3760 bool unmap = false;
3761
3762 if (cmd[1] & 0x8) {
3763 if (sdebug_lbpws10 == 0) {
3764 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 3);
3765 return check_condition_result;
3766 } else
3767 unmap = true;
3768 }
3769 lba = get_unaligned_be32(cmd + 2);
3770 num = get_unaligned_be16(cmd + 7);
3771 if (num > sdebug_write_same_length) {
3772 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 7, -1);
3773 return check_condition_result;
3774 }
3775 return resp_write_same(scp, lba, num, ei_lba, unmap, false);
3776 }
3777
3778 static int resp_write_same_16(struct scsi_cmnd *scp,
3779 struct sdebug_dev_info *devip)
3780 {
3781 u8 *cmd = scp->cmnd;
3782 u64 lba;
3783 u32 num;
3784 u32 ei_lba = 0;
3785 bool unmap = false;
3786 bool ndob = false;
3787
3788 if (cmd[1] & 0x8) { /* UNMAP */
3789 if (sdebug_lbpws == 0) {
3790 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 3);
3791 return check_condition_result;
3792 } else
3793 unmap = true;
3794 }
3795 if (cmd[1] & 0x1) /* NDOB (no data-out buffer, assumes zeroes) */
3796 ndob = true;
3797 lba = get_unaligned_be64(cmd + 2);
3798 num = get_unaligned_be32(cmd + 10);
3799 if (num > sdebug_write_same_length) {
3800 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 10, -1);
3801 return check_condition_result;
3802 }
3803 return resp_write_same(scp, lba, num, ei_lba, unmap, ndob);
3804 }
3805
3806 /* Note the mode field is in the same position as the (lower) service action
3807 * field. For the Report supported operation codes command, SPC-4 suggests
3808 * each mode of this command should be reported separately; for future. */
3809 static int resp_write_buffer(struct scsi_cmnd *scp,
3810 struct sdebug_dev_info *devip)
3811 {
3812 u8 *cmd = scp->cmnd;
3813 struct scsi_device *sdp = scp->device;
3814 struct sdebug_dev_info *dp;
3815 u8 mode;
3816
3817 mode = cmd[1] & 0x1f;
3818 switch (mode) {
3819 case 0x4: /* download microcode (MC) and activate (ACT) */
3820 /* set UAs on this device only */
3821 set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm);
3822 set_bit(SDEBUG_UA_MICROCODE_CHANGED, devip->uas_bm);
3823 break;
3824 case 0x5: /* download MC, save and ACT */
3825 set_bit(SDEBUG_UA_MICROCODE_CHANGED_WO_RESET, devip->uas_bm);
3826 break;
3827 case 0x6: /* download MC with offsets and ACT */
3828 /* set UAs on most devices (LUs) in this target */
3829 list_for_each_entry(dp,
3830 &devip->sdbg_host->dev_info_list,
3831 dev_list)
3832 if (dp->target == sdp->id) {
3833 set_bit(SDEBUG_UA_BUS_RESET, dp->uas_bm);
3834 if (devip != dp)
3835 set_bit(SDEBUG_UA_MICROCODE_CHANGED,
3836 dp->uas_bm);
3837 }
3838 break;
3839 case 0x7: /* download MC with offsets, save, and ACT */
3840 /* set UA on all devices (LUs) in this target */
3841 list_for_each_entry(dp,
3842 &devip->sdbg_host->dev_info_list,
3843 dev_list)
3844 if (dp->target == sdp->id)
3845 set_bit(SDEBUG_UA_MICROCODE_CHANGED_WO_RESET,
3846 dp->uas_bm);
3847 break;
3848 default:
3849 /* do nothing for this command for other mode values */
3850 break;
3851 }
3852 return 0;
3853 }
3854
3855 static int resp_comp_write(struct scsi_cmnd *scp,
3856 struct sdebug_dev_info *devip)
3857 {
3858 u8 *cmd = scp->cmnd;
3859 u8 *arr;
3860 struct sdeb_store_info *sip = devip2sip(devip, true);
3861 rwlock_t *macc_lckp = &sip->macc_lck;
3862 u64 lba;
3863 u32 dnum;
3864 u32 lb_size = sdebug_sector_size;
3865 u8 num;
3866 int ret;
3867 int retval = 0;
3868
3869 lba = get_unaligned_be64(cmd + 2);
3870 num = cmd[13]; /* 1 to a maximum of 255 logical blocks */
3871 if (0 == num)
3872 return 0; /* degenerate case, not an error */
3873 if (sdebug_dif == T10_PI_TYPE2_PROTECTION &&
3874 (cmd[1] & 0xe0)) {
3875 mk_sense_invalid_opcode(scp);
3876 return check_condition_result;
3877 }
3878 if ((sdebug_dif == T10_PI_TYPE1_PROTECTION ||
3879 sdebug_dif == T10_PI_TYPE3_PROTECTION) &&
3880 (cmd[1] & 0xe0) == 0)
3881 sdev_printk(KERN_ERR, scp->device, "Unprotected WR "
3882 "to DIF device\n");
3883 ret = check_device_access_params(scp, lba, num, false);
3884 if (ret)
3885 return ret;
3886 dnum = 2 * num;
3887 arr = kcalloc(lb_size, dnum, GFP_ATOMIC);
3888 if (NULL == arr) {
3889 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
3890 INSUFF_RES_ASCQ);
3891 return check_condition_result;
3892 }
3893
3894 write_lock(macc_lckp);
3895
3896 ret = do_dout_fetch(scp, dnum, arr);
3897 if (ret == -1) {
3898 retval = DID_ERROR << 16;
3899 goto cleanup;
3900 } else if (sdebug_verbose && (ret < (dnum * lb_size)))
3901 sdev_printk(KERN_INFO, scp->device, "%s: compare_write: cdb "
3902 "indicated=%u, IO sent=%d bytes\n", my_name,
3903 dnum * lb_size, ret);
3904 if (!comp_write_worker(sip, lba, num, arr, false)) {
3905 mk_sense_buffer(scp, MISCOMPARE, MISCOMPARE_VERIFY_ASC, 0);
3906 retval = check_condition_result;
3907 goto cleanup;
3908 }
3909 if (scsi_debug_lbp())
3910 map_region(sip, lba, num);
3911 cleanup:
3912 write_unlock(macc_lckp);
3913 kfree(arr);
3914 return retval;
3915 }
3916
3917 struct unmap_block_desc {
3918 __be64 lba;
3919 __be32 blocks;
3920 __be32 __reserved;
3921 };
3922
3923 static int resp_unmap(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
3924 {
3925 unsigned char *buf;
3926 struct unmap_block_desc *desc;
3927 struct sdeb_store_info *sip = devip2sip(devip, true);
3928 rwlock_t *macc_lckp = &sip->macc_lck;
3929 unsigned int i, payload_len, descriptors;
3930 int ret;
3931
3932 if (!scsi_debug_lbp())
3933 return 0; /* fib and say its done */
3934 payload_len = get_unaligned_be16(scp->cmnd + 7);
3935 BUG_ON(scsi_bufflen(scp) != payload_len);
3936
3937 descriptors = (payload_len - 8) / 16;
3938 if (descriptors > sdebug_unmap_max_desc) {
3939 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 7, -1);
3940 return check_condition_result;
3941 }
3942
3943 buf = kzalloc(scsi_bufflen(scp), GFP_ATOMIC);
3944 if (!buf) {
3945 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
3946 INSUFF_RES_ASCQ);
3947 return check_condition_result;
3948 }
3949
3950 scsi_sg_copy_to_buffer(scp, buf, scsi_bufflen(scp));
3951
3952 BUG_ON(get_unaligned_be16(&buf[0]) != payload_len - 2);
3953 BUG_ON(get_unaligned_be16(&buf[2]) != descriptors * 16);
3954
3955 desc = (void *)&buf[8];
3956
3957 write_lock(macc_lckp);
3958
3959 for (i = 0 ; i < descriptors ; i++) {
3960 unsigned long long lba = get_unaligned_be64(&desc[i].lba);
3961 unsigned int num = get_unaligned_be32(&desc[i].blocks);
3962
3963 ret = check_device_access_params(scp, lba, num, true);
3964 if (ret)
3965 goto out;
3966
3967 unmap_region(sip, lba, num);
3968 }
3969
3970 ret = 0;
3971
3972 out:
3973 write_unlock(macc_lckp);
3974 kfree(buf);
3975
3976 return ret;
3977 }
3978
3979 #define SDEBUG_GET_LBA_STATUS_LEN 32
3980
3981 static int resp_get_lba_status(struct scsi_cmnd *scp,
3982 struct sdebug_dev_info *devip)
3983 {
3984 u8 *cmd = scp->cmnd;
3985 u64 lba;
3986 u32 alloc_len, mapped, num;
3987 int ret;
3988 u8 arr[SDEBUG_GET_LBA_STATUS_LEN];
3989
3990 lba = get_unaligned_be64(cmd + 2);
3991 alloc_len = get_unaligned_be32(cmd + 10);
3992
3993 if (alloc_len < 24)
3994 return 0;
3995
3996 ret = check_device_access_params(scp, lba, 1, false);
3997 if (ret)
3998 return ret;
3999
4000 if (scsi_debug_lbp()) {
4001 struct sdeb_store_info *sip = devip2sip(devip, true);
4002
4003 mapped = map_state(sip, lba, &num);
4004 } else {
4005 mapped = 1;
4006 /* following just in case virtual_gb changed */
4007 sdebug_capacity = get_sdebug_capacity();
4008 if (sdebug_capacity - lba <= 0xffffffff)
4009 num = sdebug_capacity - lba;
4010 else
4011 num = 0xffffffff;
4012 }
4013
4014 memset(arr, 0, SDEBUG_GET_LBA_STATUS_LEN);
4015 put_unaligned_be32(20, arr); /* Parameter Data Length */
4016 put_unaligned_be64(lba, arr + 8); /* LBA */
4017 put_unaligned_be32(num, arr + 16); /* Number of blocks */
4018 arr[20] = !mapped; /* prov_stat=0: mapped; 1: dealloc */
4019
4020 return fill_from_dev_buffer(scp, arr, SDEBUG_GET_LBA_STATUS_LEN);
4021 }
4022
4023 static int resp_sync_cache(struct scsi_cmnd *scp,
4024 struct sdebug_dev_info *devip)
4025 {
4026 int res = 0;
4027 u64 lba;
4028 u32 num_blocks;
4029 u8 *cmd = scp->cmnd;
4030
4031 if (cmd[0] == SYNCHRONIZE_CACHE) { /* 10 byte cdb */
4032 lba = get_unaligned_be32(cmd + 2);
4033 num_blocks = get_unaligned_be16(cmd + 7);
4034 } else { /* SYNCHRONIZE_CACHE(16) */
4035 lba = get_unaligned_be64(cmd + 2);
4036 num_blocks = get_unaligned_be32(cmd + 10);
4037 }
4038 if (lba + num_blocks > sdebug_capacity) {
4039 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
4040 return check_condition_result;
4041 }
4042 if (!write_since_sync || (cmd[1] & 0x2))
4043 res = SDEG_RES_IMMED_MASK;
4044 else /* delay if write_since_sync and IMMED clear */
4045 write_since_sync = false;
4046 return res;
4047 }
4048
4049 /*
4050 * Assuming the LBA+num_blocks is not out-of-range, this function will return
4051 * CONDITION MET if the specified blocks will/have fitted in the cache, and
4052 * a GOOD status otherwise. Model a disk with a big cache and yield
4053 * CONDITION MET. Actually tries to bring range in main memory into the
4054 * cache associated with the CPU(s).
4055 */
4056 static int resp_pre_fetch(struct scsi_cmnd *scp,
4057 struct sdebug_dev_info *devip)
4058 {
4059 int res = 0;
4060 u64 lba;
4061 u64 block, rest = 0;
4062 u32 nblks;
4063 u8 *cmd = scp->cmnd;
4064 struct sdeb_store_info *sip = devip2sip(devip, true);
4065 rwlock_t *macc_lckp = &sip->macc_lck;
4066 u8 *fsp = sip->storep;
4067
4068 if (cmd[0] == PRE_FETCH) { /* 10 byte cdb */
4069 lba = get_unaligned_be32(cmd + 2);
4070 nblks = get_unaligned_be16(cmd + 7);
4071 } else { /* PRE-FETCH(16) */
4072 lba = get_unaligned_be64(cmd + 2);
4073 nblks = get_unaligned_be32(cmd + 10);
4074 }
4075 if (lba + nblks > sdebug_capacity) {
4076 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
4077 return check_condition_result;
4078 }
4079 if (!fsp)
4080 goto fini;
4081 /* PRE-FETCH spec says nothing about LBP or PI so skip them */
4082 block = do_div(lba, sdebug_store_sectors);
4083 if (block + nblks > sdebug_store_sectors)
4084 rest = block + nblks - sdebug_store_sectors;
4085
4086 /* Try to bring the PRE-FETCH range into CPU's cache */
4087 read_lock(macc_lckp);
4088 prefetch_range(fsp + (sdebug_sector_size * block),
4089 (nblks - rest) * sdebug_sector_size);
4090 if (rest)
4091 prefetch_range(fsp, rest * sdebug_sector_size);
4092 read_unlock(macc_lckp);
4093 fini:
4094 if (cmd[1] & 0x2)
4095 res = SDEG_RES_IMMED_MASK;
4096 return res | condition_met_result;
4097 }
4098
4099 #define RL_BUCKET_ELEMS 8
4100
4101 /* Even though each pseudo target has a REPORT LUNS "well known logical unit"
4102 * (W-LUN), the normal Linux scanning logic does not associate it with a
4103 * device (e.g. /dev/sg7). The following magic will make that association:
4104 * "cd /sys/class/scsi_host/host<n> ; echo '- - 49409' > scan"
4105 * where <n> is a host number. If there are multiple targets in a host then
4106 * the above will associate a W-LUN to each target. To only get a W-LUN
4107 * for target 2, then use "echo '- 2 49409' > scan" .
4108 */
4109 static int resp_report_luns(struct scsi_cmnd *scp,
4110 struct sdebug_dev_info *devip)
4111 {
4112 unsigned char *cmd = scp->cmnd;
4113 unsigned int alloc_len;
4114 unsigned char select_report;
4115 u64 lun;
4116 struct scsi_lun *lun_p;
4117 u8 arr[RL_BUCKET_ELEMS * sizeof(struct scsi_lun)];
4118 unsigned int lun_cnt; /* normal LUN count (max: 256) */
4119 unsigned int wlun_cnt; /* report luns W-LUN count */
4120 unsigned int tlun_cnt; /* total LUN count */
4121 unsigned int rlen; /* response length (in bytes) */
4122 int k, j, n, res;
4123 unsigned int off_rsp = 0;
4124 const int sz_lun = sizeof(struct scsi_lun);
4125
4126 clear_luns_changed_on_target(devip);
4127
4128 select_report = cmd[2];
4129 alloc_len = get_unaligned_be32(cmd + 6);
4130
4131 if (alloc_len < 4) {
4132 pr_err("alloc len too small %d\n", alloc_len);
4133 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 6, -1);
4134 return check_condition_result;
4135 }
4136
4137 switch (select_report) {
4138 case 0: /* all LUNs apart from W-LUNs */
4139 lun_cnt = sdebug_max_luns;
4140 wlun_cnt = 0;
4141 break;
4142 case 1: /* only W-LUNs */
4143 lun_cnt = 0;
4144 wlun_cnt = 1;
4145 break;
4146 case 2: /* all LUNs */
4147 lun_cnt = sdebug_max_luns;
4148 wlun_cnt = 1;
4149 break;
4150 case 0x10: /* only administrative LUs */
4151 case 0x11: /* see SPC-5 */
4152 case 0x12: /* only subsiduary LUs owned by referenced LU */
4153 default:
4154 pr_debug("select report invalid %d\n", select_report);
4155 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, -1);
4156 return check_condition_result;
4157 }
4158
4159 if (sdebug_no_lun_0 && (lun_cnt > 0))
4160 --lun_cnt;
4161
4162 tlun_cnt = lun_cnt + wlun_cnt;
4163 rlen = tlun_cnt * sz_lun; /* excluding 8 byte header */
4164 scsi_set_resid(scp, scsi_bufflen(scp));
4165 pr_debug("select_report %d luns = %d wluns = %d no_lun0 %d\n",
4166 select_report, lun_cnt, wlun_cnt, sdebug_no_lun_0);
4167
4168 /* loops rely on sizeof response header same as sizeof lun (both 8) */
4169 lun = sdebug_no_lun_0 ? 1 : 0;
4170 for (k = 0, j = 0, res = 0; true; ++k, j = 0) {
4171 memset(arr, 0, sizeof(arr));
4172 lun_p = (struct scsi_lun *)&arr[0];
4173 if (k == 0) {
4174 put_unaligned_be32(rlen, &arr[0]);
4175 ++lun_p;
4176 j = 1;
4177 }
4178 for ( ; j < RL_BUCKET_ELEMS; ++j, ++lun_p) {
4179 if ((k * RL_BUCKET_ELEMS) + j > lun_cnt)
4180 break;
4181 int_to_scsilun(lun++, lun_p);
4182 }
4183 if (j < RL_BUCKET_ELEMS)
4184 break;
4185 n = j * sz_lun;
4186 res = p_fill_from_dev_buffer(scp, arr, n, off_rsp);
4187 if (res)
4188 return res;
4189 off_rsp += n;
4190 }
4191 if (wlun_cnt) {
4192 int_to_scsilun(SCSI_W_LUN_REPORT_LUNS, lun_p);
4193 ++j;
4194 }
4195 if (j > 0)
4196 res = p_fill_from_dev_buffer(scp, arr, j * sz_lun, off_rsp);
4197 return res;
4198 }
4199
4200 static int resp_verify(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
4201 {
4202 bool is_bytchk3 = false;
4203 u8 bytchk;
4204 int ret, j;
4205 u32 vnum, a_num, off;
4206 const u32 lb_size = sdebug_sector_size;
4207 u64 lba;
4208 u8 *arr;
4209 u8 *cmd = scp->cmnd;
4210 struct sdeb_store_info *sip = devip2sip(devip, true);
4211 rwlock_t *macc_lckp = &sip->macc_lck;
4212
4213 bytchk = (cmd[1] >> 1) & 0x3;
4214 if (bytchk == 0) {
4215 return 0; /* always claim internal verify okay */
4216 } else if (bytchk == 2) {
4217 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 2);
4218 return check_condition_result;
4219 } else if (bytchk == 3) {
4220 is_bytchk3 = true; /* 1 block sent, compared repeatedly */
4221 }
4222 switch (cmd[0]) {
4223 case VERIFY_16:
4224 lba = get_unaligned_be64(cmd + 2);
4225 vnum = get_unaligned_be32(cmd + 10);
4226 break;
4227 case VERIFY: /* is VERIFY(10) */
4228 lba = get_unaligned_be32(cmd + 2);
4229 vnum = get_unaligned_be16(cmd + 7);
4230 break;
4231 default:
4232 mk_sense_invalid_opcode(scp);
4233 return check_condition_result;
4234 }
4235 a_num = is_bytchk3 ? 1 : vnum;
4236 /* Treat following check like one for read (i.e. no write) access */
4237 ret = check_device_access_params(scp, lba, a_num, false);
4238 if (ret)
4239 return ret;
4240
4241 arr = kcalloc(lb_size, vnum, GFP_ATOMIC);
4242 if (!arr) {
4243 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
4244 INSUFF_RES_ASCQ);
4245 return check_condition_result;
4246 }
4247 /* Not changing store, so only need read access */
4248 read_lock(macc_lckp);
4249
4250 ret = do_dout_fetch(scp, a_num, arr);
4251 if (ret == -1) {
4252 ret = DID_ERROR << 16;
4253 goto cleanup;
4254 } else if (sdebug_verbose && (ret < (a_num * lb_size))) {
4255 sdev_printk(KERN_INFO, scp->device,
4256 "%s: %s: cdb indicated=%u, IO sent=%d bytes\n",
4257 my_name, __func__, a_num * lb_size, ret);
4258 }
4259 if (is_bytchk3) {
4260 for (j = 1, off = lb_size; j < vnum; ++j, off += lb_size)
4261 memcpy(arr + off, arr, lb_size);
4262 }
4263 ret = 0;
4264 if (!comp_write_worker(sip, lba, vnum, arr, true)) {
4265 mk_sense_buffer(scp, MISCOMPARE, MISCOMPARE_VERIFY_ASC, 0);
4266 ret = check_condition_result;
4267 goto cleanup;
4268 }
4269 cleanup:
4270 read_unlock(macc_lckp);
4271 kfree(arr);
4272 return ret;
4273 }
4274
4275 #define RZONES_DESC_HD 64
4276
4277 /* Report zones depending on start LBA nad reporting options */
4278 static int resp_report_zones(struct scsi_cmnd *scp,
4279 struct sdebug_dev_info *devip)
4280 {
4281 unsigned int i, max_zones, rep_max_zones, nrz = 0;
4282 int ret = 0;
4283 u32 alloc_len, rep_opts, rep_len;
4284 bool partial;
4285 u64 lba, zs_lba;
4286 u8 *arr = NULL, *desc;
4287 u8 *cmd = scp->cmnd;
4288 struct sdeb_zone_state *zsp;
4289 struct sdeb_store_info *sip = devip2sip(devip, false);
4290 rwlock_t *macc_lckp = sip ? &sip->macc_lck : &sdeb_fake_rw_lck;
4291
4292 if (!sdebug_dev_is_zoned(devip)) {
4293 mk_sense_invalid_opcode(scp);
4294 return check_condition_result;
4295 }
4296 zs_lba = get_unaligned_be64(cmd + 2);
4297 alloc_len = get_unaligned_be32(cmd + 10);
4298 rep_opts = cmd[14] & 0x3f;
4299 partial = cmd[14] & 0x80;
4300
4301 if (zs_lba >= sdebug_capacity) {
4302 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
4303 return check_condition_result;
4304 }
4305
4306 max_zones = devip->nr_zones - (zs_lba >> devip->zsize_shift);
4307 rep_max_zones = min((alloc_len - 64) >> ilog2(RZONES_DESC_HD),
4308 max_zones);
4309
4310 arr = kcalloc(RZONES_DESC_HD, alloc_len, GFP_ATOMIC);
4311 if (!arr) {
4312 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC,
4313 INSUFF_RES_ASCQ);
4314 return check_condition_result;
4315 }
4316
4317 read_lock(macc_lckp);
4318
4319 desc = arr + 64;
4320 for (i = 0; i < max_zones; i++) {
4321 lba = zs_lba + devip->zsize * i;
4322 if (lba > sdebug_capacity)
4323 break;
4324 zsp = zbc_zone(devip, lba);
4325 switch (rep_opts) {
4326 case 0x00:
4327 /* All zones */
4328 break;
4329 case 0x01:
4330 /* Empty zones */
4331 if (zsp->z_cond != ZC1_EMPTY)
4332 continue;
4333 break;
4334 case 0x02:
4335 /* Implicit open zones */
4336 if (zsp->z_cond != ZC2_IMPLICIT_OPEN)
4337 continue;
4338 break;
4339 case 0x03:
4340 /* Explicit open zones */
4341 if (zsp->z_cond != ZC3_EXPLICIT_OPEN)
4342 continue;
4343 break;
4344 case 0x04:
4345 /* Closed zones */
4346 if (zsp->z_cond != ZC4_CLOSED)
4347 continue;
4348 break;
4349 case 0x05:
4350 /* Full zones */
4351 if (zsp->z_cond != ZC5_FULL)
4352 continue;
4353 break;
4354 case 0x06:
4355 case 0x07:
4356 case 0x10:
4357 /*
4358 * Read-only, offline, reset WP recommended are
4359 * not emulated: no zones to report;
4360 */
4361 continue;
4362 case 0x11:
4363 /* non-seq-resource set */
4364 if (!zsp->z_non_seq_resource)
4365 continue;
4366 break;
4367 case 0x3f:
4368 /* Not write pointer (conventional) zones */
4369 if (!zbc_zone_is_conv(zsp))
4370 continue;
4371 break;
4372 default:
4373 mk_sense_buffer(scp, ILLEGAL_REQUEST,
4374 INVALID_FIELD_IN_CDB, 0);
4375 ret = check_condition_result;
4376 goto fini;
4377 }
4378
4379 if (nrz < rep_max_zones) {
4380 /* Fill zone descriptor */
4381 desc[0] = zsp->z_type;
4382 desc[1] = zsp->z_cond << 4;
4383 if (zsp->z_non_seq_resource)
4384 desc[1] |= 1 << 1;
4385 put_unaligned_be64((u64)zsp->z_size, desc + 8);
4386 put_unaligned_be64((u64)zsp->z_start, desc + 16);
4387 put_unaligned_be64((u64)zsp->z_wp, desc + 24);
4388 desc += 64;
4389 }
4390
4391 if (partial && nrz >= rep_max_zones)
4392 break;
4393
4394 nrz++;
4395 }
4396
4397 /* Report header */
4398 put_unaligned_be32(nrz * RZONES_DESC_HD, arr + 0);
4399 put_unaligned_be64(sdebug_capacity - 1, arr + 8);
4400
4401 rep_len = (unsigned long)desc - (unsigned long)arr;
4402 ret = fill_from_dev_buffer(scp, arr, min_t(int, alloc_len, rep_len));
4403
4404 fini:
4405 read_unlock(macc_lckp);
4406 kfree(arr);
4407 return ret;
4408 }
4409
4410 /* Logic transplanted from tcmu-runner, file_zbc.c */
4411 static void zbc_open_all(struct sdebug_dev_info *devip)
4412 {
4413 struct sdeb_zone_state *zsp = &devip->zstate[0];
4414 unsigned int i;
4415
4416 for (i = 0; i < devip->nr_zones; i++, zsp++) {
4417 if (zsp->z_cond == ZC4_CLOSED)
4418 zbc_open_zone(devip, &devip->zstate[i], true);
4419 }
4420 }
4421
4422 static int resp_open_zone(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
4423 {
4424 int res = 0;
4425 u64 z_id;
4426 enum sdebug_z_cond zc;
4427 u8 *cmd = scp->cmnd;
4428 struct sdeb_zone_state *zsp;
4429 bool all = cmd[14] & 0x01;
4430 struct sdeb_store_info *sip = devip2sip(devip, false);
4431 rwlock_t *macc_lckp = sip ? &sip->macc_lck : &sdeb_fake_rw_lck;
4432
4433 if (!sdebug_dev_is_zoned(devip)) {
4434 mk_sense_invalid_opcode(scp);
4435 return check_condition_result;
4436 }
4437
4438 write_lock(macc_lckp);
4439
4440 if (all) {
4441 /* Check if all closed zones can be open */
4442 if (devip->max_open &&
4443 devip->nr_exp_open + devip->nr_closed > devip->max_open) {
4444 mk_sense_buffer(scp, DATA_PROTECT, INSUFF_RES_ASC,
4445 INSUFF_ZONE_ASCQ);
4446 res = check_condition_result;
4447 goto fini;
4448 }
4449 /* Open all closed zones */
4450 zbc_open_all(devip);
4451 goto fini;
4452 }
4453
4454 /* Open the specified zone */
4455 z_id = get_unaligned_be64(cmd + 2);
4456 if (z_id >= sdebug_capacity) {
4457 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
4458 res = check_condition_result;
4459 goto fini;
4460 }
4461
4462 zsp = zbc_zone(devip, z_id);
4463 if (z_id != zsp->z_start) {
4464 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
4465 res = check_condition_result;
4466 goto fini;
4467 }
4468 if (zbc_zone_is_conv(zsp)) {
4469 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
4470 res = check_condition_result;
4471 goto fini;
4472 }
4473
4474 zc = zsp->z_cond;
4475 if (zc == ZC3_EXPLICIT_OPEN || zc == ZC5_FULL)
4476 goto fini;
4477
4478 if (devip->max_open && devip->nr_exp_open >= devip->max_open) {
4479 mk_sense_buffer(scp, DATA_PROTECT, INSUFF_RES_ASC,
4480 INSUFF_ZONE_ASCQ);
4481 res = check_condition_result;
4482 goto fini;
4483 }
4484
4485 if (zc == ZC2_IMPLICIT_OPEN)
4486 zbc_close_zone(devip, zsp);
4487 zbc_open_zone(devip, zsp, true);
4488 fini:
4489 write_unlock(macc_lckp);
4490 return res;
4491 }
4492
4493 static void zbc_close_all(struct sdebug_dev_info *devip)
4494 {
4495 unsigned int i;
4496
4497 for (i = 0; i < devip->nr_zones; i++)
4498 zbc_close_zone(devip, &devip->zstate[i]);
4499 }
4500
4501 static int resp_close_zone(struct scsi_cmnd *scp,
4502 struct sdebug_dev_info *devip)
4503 {
4504 int res = 0;
4505 u64 z_id;
4506 u8 *cmd = scp->cmnd;
4507 struct sdeb_zone_state *zsp;
4508 bool all = cmd[14] & 0x01;
4509 struct sdeb_store_info *sip = devip2sip(devip, false);
4510 rwlock_t *macc_lckp = sip ? &sip->macc_lck : &sdeb_fake_rw_lck;
4511
4512 if (!sdebug_dev_is_zoned(devip)) {
4513 mk_sense_invalid_opcode(scp);
4514 return check_condition_result;
4515 }
4516
4517 write_lock(macc_lckp);
4518
4519 if (all) {
4520 zbc_close_all(devip);
4521 goto fini;
4522 }
4523
4524 /* Close specified zone */
4525 z_id = get_unaligned_be64(cmd + 2);
4526 if (z_id >= sdebug_capacity) {
4527 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
4528 res = check_condition_result;
4529 goto fini;
4530 }
4531
4532 zsp = zbc_zone(devip, z_id);
4533 if (z_id != zsp->z_start) {
4534 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
4535 res = check_condition_result;
4536 goto fini;
4537 }
4538 if (zbc_zone_is_conv(zsp)) {
4539 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
4540 res = check_condition_result;
4541 goto fini;
4542 }
4543
4544 zbc_close_zone(devip, zsp);
4545 fini:
4546 write_unlock(macc_lckp);
4547 return res;
4548 }
4549
4550 static void zbc_finish_zone(struct sdebug_dev_info *devip,
4551 struct sdeb_zone_state *zsp, bool empty)
4552 {
4553 enum sdebug_z_cond zc = zsp->z_cond;
4554
4555 if (zc == ZC4_CLOSED || zc == ZC2_IMPLICIT_OPEN ||
4556 zc == ZC3_EXPLICIT_OPEN || (empty && zc == ZC1_EMPTY)) {
4557 if (zc == ZC2_IMPLICIT_OPEN || zc == ZC3_EXPLICIT_OPEN)
4558 zbc_close_zone(devip, zsp);
4559 if (zsp->z_cond == ZC4_CLOSED)
4560 devip->nr_closed--;
4561 zsp->z_wp = zsp->z_start + zsp->z_size;
4562 zsp->z_cond = ZC5_FULL;
4563 }
4564 }
4565
4566 static void zbc_finish_all(struct sdebug_dev_info *devip)
4567 {
4568 unsigned int i;
4569
4570 for (i = 0; i < devip->nr_zones; i++)
4571 zbc_finish_zone(devip, &devip->zstate[i], false);
4572 }
4573
4574 static int resp_finish_zone(struct scsi_cmnd *scp,
4575 struct sdebug_dev_info *devip)
4576 {
4577 struct sdeb_zone_state *zsp;
4578 int res = 0;
4579 u64 z_id;
4580 u8 *cmd = scp->cmnd;
4581 bool all = cmd[14] & 0x01;
4582 struct sdeb_store_info *sip = devip2sip(devip, false);
4583 rwlock_t *macc_lckp = sip ? &sip->macc_lck : &sdeb_fake_rw_lck;
4584
4585 if (!sdebug_dev_is_zoned(devip)) {
4586 mk_sense_invalid_opcode(scp);
4587 return check_condition_result;
4588 }
4589
4590 write_lock(macc_lckp);
4591
4592 if (all) {
4593 zbc_finish_all(devip);
4594 goto fini;
4595 }
4596
4597 /* Finish the specified zone */
4598 z_id = get_unaligned_be64(cmd + 2);
4599 if (z_id >= sdebug_capacity) {
4600 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
4601 res = check_condition_result;
4602 goto fini;
4603 }
4604
4605 zsp = zbc_zone(devip, z_id);
4606 if (z_id != zsp->z_start) {
4607 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
4608 res = check_condition_result;
4609 goto fini;
4610 }
4611 if (zbc_zone_is_conv(zsp)) {
4612 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
4613 res = check_condition_result;
4614 goto fini;
4615 }
4616
4617 zbc_finish_zone(devip, zsp, true);
4618 fini:
4619 write_unlock(macc_lckp);
4620 return res;
4621 }
4622
4623 static void zbc_rwp_zone(struct sdebug_dev_info *devip,
4624 struct sdeb_zone_state *zsp)
4625 {
4626 enum sdebug_z_cond zc;
4627
4628 if (zbc_zone_is_conv(zsp))
4629 return;
4630
4631 zc = zsp->z_cond;
4632 if (zc == ZC2_IMPLICIT_OPEN || zc == ZC3_EXPLICIT_OPEN)
4633 zbc_close_zone(devip, zsp);
4634
4635 if (zsp->z_cond == ZC4_CLOSED)
4636 devip->nr_closed--;
4637
4638 zsp->z_non_seq_resource = false;
4639 zsp->z_wp = zsp->z_start;
4640 zsp->z_cond = ZC1_EMPTY;
4641 }
4642
4643 static void zbc_rwp_all(struct sdebug_dev_info *devip)
4644 {
4645 unsigned int i;
4646
4647 for (i = 0; i < devip->nr_zones; i++)
4648 zbc_rwp_zone(devip, &devip->zstate[i]);
4649 }
4650
4651 static int resp_rwp_zone(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
4652 {
4653 struct sdeb_zone_state *zsp;
4654 int res = 0;
4655 u64 z_id;
4656 u8 *cmd = scp->cmnd;
4657 bool all = cmd[14] & 0x01;
4658 struct sdeb_store_info *sip = devip2sip(devip, false);
4659 rwlock_t *macc_lckp = sip ? &sip->macc_lck : &sdeb_fake_rw_lck;
4660
4661 if (!sdebug_dev_is_zoned(devip)) {
4662 mk_sense_invalid_opcode(scp);
4663 return check_condition_result;
4664 }
4665
4666 write_lock(macc_lckp);
4667
4668 if (all) {
4669 zbc_rwp_all(devip);
4670 goto fini;
4671 }
4672
4673 z_id = get_unaligned_be64(cmd + 2);
4674 if (z_id >= sdebug_capacity) {
4675 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0);
4676 res = check_condition_result;
4677 goto fini;
4678 }
4679
4680 zsp = zbc_zone(devip, z_id);
4681 if (z_id != zsp->z_start) {
4682 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
4683 res = check_condition_result;
4684 goto fini;
4685 }
4686 if (zbc_zone_is_conv(zsp)) {
4687 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0);
4688 res = check_condition_result;
4689 goto fini;
4690 }
4691
4692 zbc_rwp_zone(devip, zsp);
4693 fini:
4694 write_unlock(macc_lckp);
4695 return res;
4696 }
4697
4698 static struct sdebug_queue *get_queue(struct scsi_cmnd *cmnd)
4699 {
4700 u16 hwq;
4701
4702 if (sdebug_host_max_queue) {
4703 /* Provide a simple method to choose the hwq */
4704 hwq = smp_processor_id() % submit_queues;
4705 } else {
4706 u32 tag = blk_mq_unique_tag(cmnd->request);
4707
4708 hwq = blk_mq_unique_tag_to_hwq(tag);
4709
4710 pr_debug("tag=%#x, hwq=%d\n", tag, hwq);
4711 if (WARN_ON_ONCE(hwq >= submit_queues))
4712 hwq = 0;
4713 }
4714 return sdebug_q_arr + hwq;
4715 }
4716
4717 static u32 get_tag(struct scsi_cmnd *cmnd)
4718 {
4719 return blk_mq_unique_tag(cmnd->request);
4720 }
4721
4722 /* Queued (deferred) command completions converge here. */
4723 static void sdebug_q_cmd_complete(struct sdebug_defer *sd_dp)
4724 {
4725 bool aborted = sd_dp->aborted;
4726 int qc_idx;
4727 int retiring = 0;
4728 unsigned long iflags;
4729 struct sdebug_queue *sqp;
4730 struct sdebug_queued_cmd *sqcp;
4731 struct scsi_cmnd *scp;
4732 struct sdebug_dev_info *devip;
4733
4734 sd_dp->defer_t = SDEB_DEFER_NONE;
4735 if (unlikely(aborted))
4736 sd_dp->aborted = false;
4737 qc_idx = sd_dp->qc_idx;
4738 sqp = sdebug_q_arr + sd_dp->sqa_idx;
4739 if (sdebug_statistics) {
4740 atomic_inc(&sdebug_completions);
4741 if (raw_smp_processor_id() != sd_dp->issuing_cpu)
4742 atomic_inc(&sdebug_miss_cpus);
4743 }
4744 if (unlikely((qc_idx < 0) || (qc_idx >= SDEBUG_CANQUEUE))) {
4745 pr_err("wild qc_idx=%d\n", qc_idx);
4746 return;
4747 }
4748 spin_lock_irqsave(&sqp->qc_lock, iflags);
4749 sqcp = &sqp->qc_arr[qc_idx];
4750 scp = sqcp->a_cmnd;
4751 if (unlikely(scp == NULL)) {
4752 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
4753 pr_err("scp is NULL, sqa_idx=%d, qc_idx=%d, hc_idx=%d\n",
4754 sd_dp->sqa_idx, qc_idx, sd_dp->hc_idx);
4755 return;
4756 }
4757 devip = (struct sdebug_dev_info *)scp->device->hostdata;
4758 if (likely(devip))
4759 atomic_dec(&devip->num_in_q);
4760 else
4761 pr_err("devip=NULL\n");
4762 if (unlikely(atomic_read(&retired_max_queue) > 0))
4763 retiring = 1;
4764
4765 sqcp->a_cmnd = NULL;
4766 if (unlikely(!test_and_clear_bit(qc_idx, sqp->in_use_bm))) {
4767 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
4768 pr_err("Unexpected completion\n");
4769 return;
4770 }
4771
4772 if (unlikely(retiring)) { /* user has reduced max_queue */
4773 int k, retval;
4774
4775 retval = atomic_read(&retired_max_queue);
4776 if (qc_idx >= retval) {
4777 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
4778 pr_err("index %d too large\n", retval);
4779 return;
4780 }
4781 k = find_last_bit(sqp->in_use_bm, retval);
4782 if ((k < sdebug_max_queue) || (k == retval))
4783 atomic_set(&retired_max_queue, 0);
4784 else
4785 atomic_set(&retired_max_queue, k + 1);
4786 }
4787 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
4788 if (unlikely(aborted)) {
4789 if (sdebug_verbose)
4790 pr_info("bypassing scsi_done() due to aborted cmd\n");
4791 return;
4792 }
4793 scp->scsi_done(scp); /* callback to mid level */
4794 }
4795
4796 /* When high resolution timer goes off this function is called. */
4797 static enum hrtimer_restart sdebug_q_cmd_hrt_complete(struct hrtimer *timer)
4798 {
4799 struct sdebug_defer *sd_dp = container_of(timer, struct sdebug_defer,
4800 hrt);
4801 sdebug_q_cmd_complete(sd_dp);
4802 return HRTIMER_NORESTART;
4803 }
4804
4805 /* When work queue schedules work, it calls this function. */
4806 static void sdebug_q_cmd_wq_complete(struct work_struct *work)
4807 {
4808 struct sdebug_defer *sd_dp = container_of(work, struct sdebug_defer,
4809 ew.work);
4810 sdebug_q_cmd_complete(sd_dp);
4811 }
4812
4813 static bool got_shared_uuid;
4814 static uuid_t shared_uuid;
4815
4816 static int sdebug_device_create_zones(struct sdebug_dev_info *devip)
4817 {
4818 struct sdeb_zone_state *zsp;
4819 sector_t capacity = get_sdebug_capacity();
4820 sector_t zstart = 0;
4821 unsigned int i;
4822
4823 /*
4824 * Set the zone size: if sdeb_zbc_zone_size_mb is not set, figure out
4825 * a zone size allowing for at least 4 zones on the device. Otherwise,
4826 * use the specified zone size checking that at least 2 zones can be
4827 * created for the device.
4828 */
4829 if (!sdeb_zbc_zone_size_mb) {
4830 devip->zsize = (DEF_ZBC_ZONE_SIZE_MB * SZ_1M)
4831 >> ilog2(sdebug_sector_size);
4832 while (capacity < devip->zsize << 2 && devip->zsize >= 2)
4833 devip->zsize >>= 1;
4834 if (devip->zsize < 2) {
4835 pr_err("Device capacity too small\n");
4836 return -EINVAL;
4837 }
4838 } else {
4839 if (!is_power_of_2(sdeb_zbc_zone_size_mb)) {
4840 pr_err("Zone size is not a power of 2\n");
4841 return -EINVAL;
4842 }
4843 devip->zsize = (sdeb_zbc_zone_size_mb * SZ_1M)
4844 >> ilog2(sdebug_sector_size);
4845 if (devip->zsize >= capacity) {
4846 pr_err("Zone size too large for device capacity\n");
4847 return -EINVAL;
4848 }
4849 }
4850
4851 devip->zsize_shift = ilog2(devip->zsize);
4852 devip->nr_zones = (capacity + devip->zsize - 1) >> devip->zsize_shift;
4853
4854 if (sdeb_zbc_nr_conv >= devip->nr_zones) {
4855 pr_err("Number of conventional zones too large\n");
4856 return -EINVAL;
4857 }
4858 devip->nr_conv_zones = sdeb_zbc_nr_conv;
4859
4860 if (devip->zmodel == BLK_ZONED_HM) {
4861 /* zbc_max_open_zones can be 0, meaning "not reported" */
4862 if (sdeb_zbc_max_open >= devip->nr_zones - 1)
4863 devip->max_open = (devip->nr_zones - 1) / 2;
4864 else
4865 devip->max_open = sdeb_zbc_max_open;
4866 }
4867
4868 devip->zstate = kcalloc(devip->nr_zones,
4869 sizeof(struct sdeb_zone_state), GFP_KERNEL);
4870 if (!devip->zstate)
4871 return -ENOMEM;
4872
4873 for (i = 0; i < devip->nr_zones; i++) {
4874 zsp = &devip->zstate[i];
4875
4876 zsp->z_start = zstart;
4877
4878 if (i < devip->nr_conv_zones) {
4879 zsp->z_type = ZBC_ZONE_TYPE_CNV;
4880 zsp->z_cond = ZBC_NOT_WRITE_POINTER;
4881 zsp->z_wp = (sector_t)-1;
4882 } else {
4883 if (devip->zmodel == BLK_ZONED_HM)
4884 zsp->z_type = ZBC_ZONE_TYPE_SWR;
4885 else
4886 zsp->z_type = ZBC_ZONE_TYPE_SWP;
4887 zsp->z_cond = ZC1_EMPTY;
4888 zsp->z_wp = zsp->z_start;
4889 }
4890
4891 if (zsp->z_start + devip->zsize < capacity)
4892 zsp->z_size = devip->zsize;
4893 else
4894 zsp->z_size = capacity - zsp->z_start;
4895
4896 zstart += zsp->z_size;
4897 }
4898
4899 return 0;
4900 }
4901
4902 static struct sdebug_dev_info *sdebug_device_create(
4903 struct sdebug_host_info *sdbg_host, gfp_t flags)
4904 {
4905 struct sdebug_dev_info *devip;
4906
4907 devip = kzalloc(sizeof(*devip), flags);
4908 if (devip) {
4909 if (sdebug_uuid_ctl == 1)
4910 uuid_gen(&devip->lu_name);
4911 else if (sdebug_uuid_ctl == 2) {
4912 if (got_shared_uuid)
4913 devip->lu_name = shared_uuid;
4914 else {
4915 uuid_gen(&shared_uuid);
4916 got_shared_uuid = true;
4917 devip->lu_name = shared_uuid;
4918 }
4919 }
4920 devip->sdbg_host = sdbg_host;
4921 if (sdeb_zbc_in_use) {
4922 devip->zmodel = sdeb_zbc_model;
4923 if (sdebug_device_create_zones(devip)) {
4924 kfree(devip);
4925 return NULL;
4926 }
4927 } else {
4928 devip->zmodel = BLK_ZONED_NONE;
4929 }
4930 devip->sdbg_host = sdbg_host;
4931 devip->create_ts = ktime_get_boottime();
4932 atomic_set(&devip->stopped, (sdeb_tur_ms_to_ready > 0 ? 2 : 0));
4933 list_add_tail(&devip->dev_list, &sdbg_host->dev_info_list);
4934 }
4935 return devip;
4936 }
4937
4938 static struct sdebug_dev_info *find_build_dev_info(struct scsi_device *sdev)
4939 {
4940 struct sdebug_host_info *sdbg_host;
4941 struct sdebug_dev_info *open_devip = NULL;
4942 struct sdebug_dev_info *devip;
4943
4944 sdbg_host = *(struct sdebug_host_info **)shost_priv(sdev->host);
4945 if (!sdbg_host) {
4946 pr_err("Host info NULL\n");
4947 return NULL;
4948 }
4949 list_for_each_entry(devip, &sdbg_host->dev_info_list, dev_list) {
4950 if ((devip->used) && (devip->channel == sdev->channel) &&
4951 (devip->target == sdev->id) &&
4952 (devip->lun == sdev->lun))
4953 return devip;
4954 else {
4955 if ((!devip->used) && (!open_devip))
4956 open_devip = devip;
4957 }
4958 }
4959 if (!open_devip) { /* try and make a new one */
4960 open_devip = sdebug_device_create(sdbg_host, GFP_ATOMIC);
4961 if (!open_devip) {
4962 pr_err("out of memory at line %d\n", __LINE__);
4963 return NULL;
4964 }
4965 }
4966
4967 open_devip->channel = sdev->channel;
4968 open_devip->target = sdev->id;
4969 open_devip->lun = sdev->lun;
4970 open_devip->sdbg_host = sdbg_host;
4971 atomic_set(&open_devip->num_in_q, 0);
4972 set_bit(SDEBUG_UA_POR, open_devip->uas_bm);
4973 open_devip->used = true;
4974 return open_devip;
4975 }
4976
4977 static int scsi_debug_slave_alloc(struct scsi_device *sdp)
4978 {
4979 if (sdebug_verbose)
4980 pr_info("slave_alloc <%u %u %u %llu>\n",
4981 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
4982 return 0;
4983 }
4984
4985 static int scsi_debug_slave_configure(struct scsi_device *sdp)
4986 {
4987 struct sdebug_dev_info *devip =
4988 (struct sdebug_dev_info *)sdp->hostdata;
4989
4990 if (sdebug_verbose)
4991 pr_info("slave_configure <%u %u %u %llu>\n",
4992 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
4993 if (sdp->host->max_cmd_len != SDEBUG_MAX_CMD_LEN)
4994 sdp->host->max_cmd_len = SDEBUG_MAX_CMD_LEN;
4995 if (devip == NULL) {
4996 devip = find_build_dev_info(sdp);
4997 if (devip == NULL)
4998 return 1; /* no resources, will be marked offline */
4999 }
5000 sdp->hostdata = devip;
5001 if (sdebug_no_uld)
5002 sdp->no_uld_attach = 1;
5003 config_cdb_len(sdp);
5004 return 0;
5005 }
5006
5007 static void scsi_debug_slave_destroy(struct scsi_device *sdp)
5008 {
5009 struct sdebug_dev_info *devip =
5010 (struct sdebug_dev_info *)sdp->hostdata;
5011
5012 if (sdebug_verbose)
5013 pr_info("slave_destroy <%u %u %u %llu>\n",
5014 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun);
5015 if (devip) {
5016 /* make this slot available for re-use */
5017 devip->used = false;
5018 sdp->hostdata = NULL;
5019 }
5020 }
5021
5022 static void stop_qc_helper(struct sdebug_defer *sd_dp,
5023 enum sdeb_defer_type defer_t)
5024 {
5025 if (!sd_dp)
5026 return;
5027 if (defer_t == SDEB_DEFER_HRT)
5028 hrtimer_cancel(&sd_dp->hrt);
5029 else if (defer_t == SDEB_DEFER_WQ)
5030 cancel_work_sync(&sd_dp->ew.work);
5031 }
5032
5033 /* If @cmnd found deletes its timer or work queue and returns true; else
5034 returns false */
5035 static bool stop_queued_cmnd(struct scsi_cmnd *cmnd)
5036 {
5037 unsigned long iflags;
5038 int j, k, qmax, r_qmax;
5039 enum sdeb_defer_type l_defer_t;
5040 struct sdebug_queue *sqp;
5041 struct sdebug_queued_cmd *sqcp;
5042 struct sdebug_dev_info *devip;
5043 struct sdebug_defer *sd_dp;
5044
5045 for (j = 0, sqp = sdebug_q_arr; j < submit_queues; ++j, ++sqp) {
5046 spin_lock_irqsave(&sqp->qc_lock, iflags);
5047 qmax = sdebug_max_queue;
5048 r_qmax = atomic_read(&retired_max_queue);
5049 if (r_qmax > qmax)
5050 qmax = r_qmax;
5051 for (k = 0; k < qmax; ++k) {
5052 if (test_bit(k, sqp->in_use_bm)) {
5053 sqcp = &sqp->qc_arr[k];
5054 if (cmnd != sqcp->a_cmnd)
5055 continue;
5056 /* found */
5057 devip = (struct sdebug_dev_info *)
5058 cmnd->device->hostdata;
5059 if (devip)
5060 atomic_dec(&devip->num_in_q);
5061 sqcp->a_cmnd = NULL;
5062 sd_dp = sqcp->sd_dp;
5063 if (sd_dp) {
5064 l_defer_t = sd_dp->defer_t;
5065 sd_dp->defer_t = SDEB_DEFER_NONE;
5066 } else
5067 l_defer_t = SDEB_DEFER_NONE;
5068 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
5069 stop_qc_helper(sd_dp, l_defer_t);
5070 clear_bit(k, sqp->in_use_bm);
5071 return true;
5072 }
5073 }
5074 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
5075 }
5076 return false;
5077 }
5078
5079 /* Deletes (stops) timers or work queues of all queued commands */
5080 static void stop_all_queued(void)
5081 {
5082 unsigned long iflags;
5083 int j, k;
5084 enum sdeb_defer_type l_defer_t;
5085 struct sdebug_queue *sqp;
5086 struct sdebug_queued_cmd *sqcp;
5087 struct sdebug_dev_info *devip;
5088 struct sdebug_defer *sd_dp;
5089
5090 for (j = 0, sqp = sdebug_q_arr; j < submit_queues; ++j, ++sqp) {
5091 spin_lock_irqsave(&sqp->qc_lock, iflags);
5092 for (k = 0; k < SDEBUG_CANQUEUE; ++k) {
5093 if (test_bit(k, sqp->in_use_bm)) {
5094 sqcp = &sqp->qc_arr[k];
5095 if (sqcp->a_cmnd == NULL)
5096 continue;
5097 devip = (struct sdebug_dev_info *)
5098 sqcp->a_cmnd->device->hostdata;
5099 if (devip)
5100 atomic_dec(&devip->num_in_q);
5101 sqcp->a_cmnd = NULL;
5102 sd_dp = sqcp->sd_dp;
5103 if (sd_dp) {
5104 l_defer_t = sd_dp->defer_t;
5105 sd_dp->defer_t = SDEB_DEFER_NONE;
5106 } else
5107 l_defer_t = SDEB_DEFER_NONE;
5108 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
5109 stop_qc_helper(sd_dp, l_defer_t);
5110 clear_bit(k, sqp->in_use_bm);
5111 spin_lock_irqsave(&sqp->qc_lock, iflags);
5112 }
5113 }
5114 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
5115 }
5116 }
5117
5118 /* Free queued command memory on heap */
5119 static void free_all_queued(void)
5120 {
5121 int j, k;
5122 struct sdebug_queue *sqp;
5123 struct sdebug_queued_cmd *sqcp;
5124
5125 for (j = 0, sqp = sdebug_q_arr; j < submit_queues; ++j, ++sqp) {
5126 for (k = 0; k < SDEBUG_CANQUEUE; ++k) {
5127 sqcp = &sqp->qc_arr[k];
5128 kfree(sqcp->sd_dp);
5129 sqcp->sd_dp = NULL;
5130 }
5131 }
5132 }
5133
5134 static int scsi_debug_abort(struct scsi_cmnd *SCpnt)
5135 {
5136 bool ok;
5137
5138 ++num_aborts;
5139 if (SCpnt) {
5140 ok = stop_queued_cmnd(SCpnt);
5141 if (SCpnt->device && (SDEBUG_OPT_ALL_NOISE & sdebug_opts))
5142 sdev_printk(KERN_INFO, SCpnt->device,
5143 "%s: command%s found\n", __func__,
5144 ok ? "" : " not");
5145 }
5146 return SUCCESS;
5147 }
5148
5149 static int scsi_debug_device_reset(struct scsi_cmnd *SCpnt)
5150 {
5151 ++num_dev_resets;
5152 if (SCpnt && SCpnt->device) {
5153 struct scsi_device *sdp = SCpnt->device;
5154 struct sdebug_dev_info *devip =
5155 (struct sdebug_dev_info *)sdp->hostdata;
5156
5157 if (SDEBUG_OPT_ALL_NOISE & sdebug_opts)
5158 sdev_printk(KERN_INFO, sdp, "%s\n", __func__);
5159 if (devip)
5160 set_bit(SDEBUG_UA_POR, devip->uas_bm);
5161 }
5162 return SUCCESS;
5163 }
5164
5165 static int scsi_debug_target_reset(struct scsi_cmnd *SCpnt)
5166 {
5167 struct sdebug_host_info *sdbg_host;
5168 struct sdebug_dev_info *devip;
5169 struct scsi_device *sdp;
5170 struct Scsi_Host *hp;
5171 int k = 0;
5172
5173 ++num_target_resets;
5174 if (!SCpnt)
5175 goto lie;
5176 sdp = SCpnt->device;
5177 if (!sdp)
5178 goto lie;
5179 if (SDEBUG_OPT_ALL_NOISE & sdebug_opts)
5180 sdev_printk(KERN_INFO, sdp, "%s\n", __func__);
5181 hp = sdp->host;
5182 if (!hp)
5183 goto lie;
5184 sdbg_host = *(struct sdebug_host_info **)shost_priv(hp);
5185 if (sdbg_host) {
5186 list_for_each_entry(devip,
5187 &sdbg_host->dev_info_list,
5188 dev_list)
5189 if (devip->target == sdp->id) {
5190 set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm);
5191 ++k;
5192 }
5193 }
5194 if (SDEBUG_OPT_RESET_NOISE & sdebug_opts)
5195 sdev_printk(KERN_INFO, sdp,
5196 "%s: %d device(s) found in target\n", __func__, k);
5197 lie:
5198 return SUCCESS;
5199 }
5200
5201 static int scsi_debug_bus_reset(struct scsi_cmnd *SCpnt)
5202 {
5203 struct sdebug_host_info *sdbg_host;
5204 struct sdebug_dev_info *devip;
5205 struct scsi_device *sdp;
5206 struct Scsi_Host *hp;
5207 int k = 0;
5208
5209 ++num_bus_resets;
5210 if (!(SCpnt && SCpnt->device))
5211 goto lie;
5212 sdp = SCpnt->device;
5213 if (SDEBUG_OPT_ALL_NOISE & sdebug_opts)
5214 sdev_printk(KERN_INFO, sdp, "%s\n", __func__);
5215 hp = sdp->host;
5216 if (hp) {
5217 sdbg_host = *(struct sdebug_host_info **)shost_priv(hp);
5218 if (sdbg_host) {
5219 list_for_each_entry(devip,
5220 &sdbg_host->dev_info_list,
5221 dev_list) {
5222 set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm);
5223 ++k;
5224 }
5225 }
5226 }
5227 if (SDEBUG_OPT_RESET_NOISE & sdebug_opts)
5228 sdev_printk(KERN_INFO, sdp,
5229 "%s: %d device(s) found in host\n", __func__, k);
5230 lie:
5231 return SUCCESS;
5232 }
5233
5234 static int scsi_debug_host_reset(struct scsi_cmnd *SCpnt)
5235 {
5236 struct sdebug_host_info *sdbg_host;
5237 struct sdebug_dev_info *devip;
5238 int k = 0;
5239
5240 ++num_host_resets;
5241 if ((SCpnt->device) && (SDEBUG_OPT_ALL_NOISE & sdebug_opts))
5242 sdev_printk(KERN_INFO, SCpnt->device, "%s\n", __func__);
5243 spin_lock(&sdebug_host_list_lock);
5244 list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) {
5245 list_for_each_entry(devip, &sdbg_host->dev_info_list,
5246 dev_list) {
5247 set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm);
5248 ++k;
5249 }
5250 }
5251 spin_unlock(&sdebug_host_list_lock);
5252 stop_all_queued();
5253 if (SDEBUG_OPT_RESET_NOISE & sdebug_opts)
5254 sdev_printk(KERN_INFO, SCpnt->device,
5255 "%s: %d device(s) found\n", __func__, k);
5256 return SUCCESS;
5257 }
5258
5259 static void sdebug_build_parts(unsigned char *ramp, unsigned long store_size)
5260 {
5261 struct msdos_partition *pp;
5262 int starts[SDEBUG_MAX_PARTS + 2];
5263 int sectors_per_part, num_sectors, k;
5264 int heads_by_sects, start_sec, end_sec;
5265
5266 /* assume partition table already zeroed */
5267 if ((sdebug_num_parts < 1) || (store_size < 1048576))
5268 return;
5269 if (sdebug_num_parts > SDEBUG_MAX_PARTS) {
5270 sdebug_num_parts = SDEBUG_MAX_PARTS;
5271 pr_warn("reducing partitions to %d\n", SDEBUG_MAX_PARTS);
5272 }
5273 num_sectors = (int)sdebug_store_sectors;
5274 sectors_per_part = (num_sectors - sdebug_sectors_per)
5275 / sdebug_num_parts;
5276 heads_by_sects = sdebug_heads * sdebug_sectors_per;
5277 starts[0] = sdebug_sectors_per;
5278 for (k = 1; k < sdebug_num_parts; ++k)
5279 starts[k] = ((k * sectors_per_part) / heads_by_sects)
5280 * heads_by_sects;
5281 starts[sdebug_num_parts] = num_sectors;
5282 starts[sdebug_num_parts + 1] = 0;
5283
5284 ramp[510] = 0x55; /* magic partition markings */
5285 ramp[511] = 0xAA;
5286 pp = (struct msdos_partition *)(ramp + 0x1be);
5287 for (k = 0; starts[k + 1]; ++k, ++pp) {
5288 start_sec = starts[k];
5289 end_sec = starts[k + 1] - 1;
5290 pp->boot_ind = 0;
5291
5292 pp->cyl = start_sec / heads_by_sects;
5293 pp->head = (start_sec - (pp->cyl * heads_by_sects))
5294 / sdebug_sectors_per;
5295 pp->sector = (start_sec % sdebug_sectors_per) + 1;
5296
5297 pp->end_cyl = end_sec / heads_by_sects;
5298 pp->end_head = (end_sec - (pp->end_cyl * heads_by_sects))
5299 / sdebug_sectors_per;
5300 pp->end_sector = (end_sec % sdebug_sectors_per) + 1;
5301
5302 pp->start_sect = cpu_to_le32(start_sec);
5303 pp->nr_sects = cpu_to_le32(end_sec - start_sec + 1);
5304 pp->sys_ind = 0x83; /* plain Linux partition */
5305 }
5306 }
5307
5308 static void block_unblock_all_queues(bool block)
5309 {
5310 int j;
5311 struct sdebug_queue *sqp;
5312
5313 for (j = 0, sqp = sdebug_q_arr; j < submit_queues; ++j, ++sqp)
5314 atomic_set(&sqp->blocked, (int)block);
5315 }
5316
5317 /* Adjust (by rounding down) the sdebug_cmnd_count so abs(every_nth)-1
5318 * commands will be processed normally before triggers occur.
5319 */
5320 static void tweak_cmnd_count(void)
5321 {
5322 int count, modulo;
5323
5324 modulo = abs(sdebug_every_nth);
5325 if (modulo < 2)
5326 return;
5327 block_unblock_all_queues(true);
5328 count = atomic_read(&sdebug_cmnd_count);
5329 atomic_set(&sdebug_cmnd_count, (count / modulo) * modulo);
5330 block_unblock_all_queues(false);
5331 }
5332
5333 static void clear_queue_stats(void)
5334 {
5335 atomic_set(&sdebug_cmnd_count, 0);
5336 atomic_set(&sdebug_completions, 0);
5337 atomic_set(&sdebug_miss_cpus, 0);
5338 atomic_set(&sdebug_a_tsf, 0);
5339 }
5340
5341 static bool inject_on_this_cmd(void)
5342 {
5343 if (sdebug_every_nth == 0)
5344 return false;
5345 return (atomic_read(&sdebug_cmnd_count) % abs(sdebug_every_nth)) == 0;
5346 }
5347
5348 #define INCLUSIVE_TIMING_MAX_NS 1000000 /* 1 millisecond */
5349
5350 /* Complete the processing of the thread that queued a SCSI command to this
5351 * driver. It either completes the command by calling cmnd_done() or
5352 * schedules a hr timer or work queue then returns 0. Returns
5353 * SCSI_MLQUEUE_HOST_BUSY if temporarily out of resources.
5354 */
5355 static int schedule_resp(struct scsi_cmnd *cmnd, struct sdebug_dev_info *devip,
5356 int scsi_result,
5357 int (*pfp)(struct scsi_cmnd *,
5358 struct sdebug_dev_info *),
5359 int delta_jiff, int ndelay)
5360 {
5361 bool new_sd_dp;
5362 bool inject = false;
5363 int k, num_in_q, qdepth;
5364 unsigned long iflags;
5365 u64 ns_from_boot = 0;
5366 struct sdebug_queue *sqp;
5367 struct sdebug_queued_cmd *sqcp;
5368 struct scsi_device *sdp;
5369 struct sdebug_defer *sd_dp;
5370
5371 if (unlikely(devip == NULL)) {
5372 if (scsi_result == 0)
5373 scsi_result = DID_NO_CONNECT << 16;
5374 goto respond_in_thread;
5375 }
5376 sdp = cmnd->device;
5377
5378 if (delta_jiff == 0)
5379 goto respond_in_thread;
5380
5381 sqp = get_queue(cmnd);
5382 spin_lock_irqsave(&sqp->qc_lock, iflags);
5383 if (unlikely(atomic_read(&sqp->blocked))) {
5384 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
5385 return SCSI_MLQUEUE_HOST_BUSY;
5386 }
5387 num_in_q = atomic_read(&devip->num_in_q);
5388 qdepth = cmnd->device->queue_depth;
5389 if (unlikely((qdepth > 0) && (num_in_q >= qdepth))) {
5390 if (scsi_result) {
5391 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
5392 goto respond_in_thread;
5393 } else
5394 scsi_result = device_qfull_result;
5395 } else if (unlikely(sdebug_every_nth &&
5396 (SDEBUG_OPT_RARE_TSF & sdebug_opts) &&
5397 (scsi_result == 0))) {
5398 if ((num_in_q == (qdepth - 1)) &&
5399 (atomic_inc_return(&sdebug_a_tsf) >=
5400 abs(sdebug_every_nth))) {
5401 atomic_set(&sdebug_a_tsf, 0);
5402 inject = true;
5403 scsi_result = device_qfull_result;
5404 }
5405 }
5406
5407 k = find_first_zero_bit(sqp->in_use_bm, sdebug_max_queue);
5408 if (unlikely(k >= sdebug_max_queue)) {
5409 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
5410 if (scsi_result)
5411 goto respond_in_thread;
5412 else if (SDEBUG_OPT_ALL_TSF & sdebug_opts)
5413 scsi_result = device_qfull_result;
5414 if (SDEBUG_OPT_Q_NOISE & sdebug_opts)
5415 sdev_printk(KERN_INFO, sdp,
5416 "%s: max_queue=%d exceeded, %s\n",
5417 __func__, sdebug_max_queue,
5418 (scsi_result ? "status: TASK SET FULL" :
5419 "report: host busy"));
5420 if (scsi_result)
5421 goto respond_in_thread;
5422 else
5423 return SCSI_MLQUEUE_HOST_BUSY;
5424 }
5425 set_bit(k, sqp->in_use_bm);
5426 atomic_inc(&devip->num_in_q);
5427 sqcp = &sqp->qc_arr[k];
5428 sqcp->a_cmnd = cmnd;
5429 cmnd->host_scribble = (unsigned char *)sqcp;
5430 sd_dp = sqcp->sd_dp;
5431 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
5432 if (!sd_dp) {
5433 sd_dp = kzalloc(sizeof(*sd_dp), GFP_ATOMIC);
5434 if (!sd_dp) {
5435 atomic_dec(&devip->num_in_q);
5436 clear_bit(k, sqp->in_use_bm);
5437 return SCSI_MLQUEUE_HOST_BUSY;
5438 }
5439 new_sd_dp = true;
5440 } else {
5441 new_sd_dp = false;
5442 }
5443
5444 /* Set the hostwide tag */
5445 if (sdebug_host_max_queue)
5446 sd_dp->hc_idx = get_tag(cmnd);
5447
5448 if (ndelay > 0 && ndelay < INCLUSIVE_TIMING_MAX_NS)
5449 ns_from_boot = ktime_get_boottime_ns();
5450
5451 /* one of the resp_*() response functions is called here */
5452 cmnd->result = pfp ? pfp(cmnd, devip) : 0;
5453 if (cmnd->result & SDEG_RES_IMMED_MASK) {
5454 cmnd->result &= ~SDEG_RES_IMMED_MASK;
5455 delta_jiff = ndelay = 0;
5456 }
5457 if (cmnd->result == 0 && scsi_result != 0)
5458 cmnd->result = scsi_result;
5459 if (cmnd->result == 0 && unlikely(sdebug_opts & SDEBUG_OPT_TRANSPORT_ERR)) {
5460 if (atomic_read(&sdeb_inject_pending)) {
5461 mk_sense_buffer(cmnd, ABORTED_COMMAND, TRANSPORT_PROBLEM, ACK_NAK_TO);
5462 atomic_set(&sdeb_inject_pending, 0);
5463 cmnd->result = check_condition_result;
5464 }
5465 }
5466
5467 if (unlikely(sdebug_verbose && cmnd->result))
5468 sdev_printk(KERN_INFO, sdp, "%s: non-zero result=0x%x\n",
5469 __func__, cmnd->result);
5470
5471 if (delta_jiff > 0 || ndelay > 0) {
5472 ktime_t kt;
5473
5474 if (delta_jiff > 0) {
5475 u64 ns = jiffies_to_nsecs(delta_jiff);
5476
5477 if (sdebug_random && ns < U32_MAX) {
5478 ns = prandom_u32_max((u32)ns);
5479 } else if (sdebug_random) {
5480 ns >>= 12; /* scale to 4 usec precision */
5481 if (ns < U32_MAX) /* over 4 hours max */
5482 ns = prandom_u32_max((u32)ns);
5483 ns <<= 12;
5484 }
5485 kt = ns_to_ktime(ns);
5486 } else { /* ndelay has a 4.2 second max */
5487 kt = sdebug_random ? prandom_u32_max((u32)ndelay) :
5488 (u32)ndelay;
5489 if (ndelay < INCLUSIVE_TIMING_MAX_NS) {
5490 u64 d = ktime_get_boottime_ns() - ns_from_boot;
5491
5492 if (kt <= d) { /* elapsed duration >= kt */
5493 spin_lock_irqsave(&sqp->qc_lock, iflags);
5494 sqcp->a_cmnd = NULL;
5495 atomic_dec(&devip->num_in_q);
5496 clear_bit(k, sqp->in_use_bm);
5497 spin_unlock_irqrestore(&sqp->qc_lock, iflags);
5498 if (new_sd_dp)
5499 kfree(sd_dp);
5500 /* call scsi_done() from this thread */
5501 cmnd->scsi_done(cmnd);
5502 return 0;
5503 }
5504 /* otherwise reduce kt by elapsed time */
5505 kt -= d;
5506 }
5507 }
5508 if (!sd_dp->init_hrt) {
5509 sd_dp->init_hrt = true;
5510 sqcp->sd_dp = sd_dp;
5511 hrtimer_init(&sd_dp->hrt, CLOCK_MONOTONIC,
5512 HRTIMER_MODE_REL_PINNED);
5513 sd_dp->hrt.function = sdebug_q_cmd_hrt_complete;
5514 sd_dp->sqa_idx = sqp - sdebug_q_arr;
5515 sd_dp->qc_idx = k;
5516 }
5517 if (sdebug_statistics)
5518 sd_dp->issuing_cpu = raw_smp_processor_id();
5519 sd_dp->defer_t = SDEB_DEFER_HRT;
5520 /* schedule the invocation of scsi_done() for a later time */
5521 hrtimer_start(&sd_dp->hrt, kt, HRTIMER_MODE_REL_PINNED);
5522 } else { /* jdelay < 0, use work queue */
5523 if (!sd_dp->init_wq) {
5524 sd_dp->init_wq = true;
5525 sqcp->sd_dp = sd_dp;
5526 sd_dp->sqa_idx = sqp - sdebug_q_arr;
5527 sd_dp->qc_idx = k;
5528 INIT_WORK(&sd_dp->ew.work, sdebug_q_cmd_wq_complete);
5529 }
5530 if (sdebug_statistics)
5531 sd_dp->issuing_cpu = raw_smp_processor_id();
5532 sd_dp->defer_t = SDEB_DEFER_WQ;
5533 if (unlikely((sdebug_opts & SDEBUG_OPT_CMD_ABORT) &&
5534 atomic_read(&sdeb_inject_pending)))
5535 sd_dp->aborted = true;
5536 schedule_work(&sd_dp->ew.work);
5537 if (unlikely((sdebug_opts & SDEBUG_OPT_CMD_ABORT) &&
5538 atomic_read(&sdeb_inject_pending))) {
5539 sdev_printk(KERN_INFO, sdp, "abort request tag %d\n", cmnd->request->tag);
5540 blk_abort_request(cmnd->request);
5541 atomic_set(&sdeb_inject_pending, 0);
5542 }
5543 }
5544 if (unlikely((SDEBUG_OPT_Q_NOISE & sdebug_opts) && scsi_result == device_qfull_result))
5545 sdev_printk(KERN_INFO, sdp, "%s: num_in_q=%d +1, %s%s\n", __func__,
5546 num_in_q, (inject ? "<inject> " : ""), "status: TASK SET FULL");
5547 return 0;
5548
5549 respond_in_thread: /* call back to mid-layer using invocation thread */
5550 cmnd->result = pfp != NULL ? pfp(cmnd, devip) : 0;
5551 cmnd->result &= ~SDEG_RES_IMMED_MASK;
5552 if (cmnd->result == 0 && scsi_result != 0)
5553 cmnd->result = scsi_result;
5554 cmnd->scsi_done(cmnd);
5555 return 0;
5556 }
5557
5558 /* Note: The following macros create attribute files in the
5559 /sys/module/scsi_debug/parameters directory. Unfortunately this
5560 driver is unaware of a change and cannot trigger auxiliary actions
5561 as it can when the corresponding attribute in the
5562 /sys/bus/pseudo/drivers/scsi_debug directory is changed.
5563 */
5564 module_param_named(add_host, sdebug_add_host, int, S_IRUGO | S_IWUSR);
5565 module_param_named(ato, sdebug_ato, int, S_IRUGO);
5566 module_param_named(cdb_len, sdebug_cdb_len, int, 0644);
5567 module_param_named(clustering, sdebug_clustering, bool, S_IRUGO | S_IWUSR);
5568 module_param_named(delay, sdebug_jdelay, int, S_IRUGO | S_IWUSR);
5569 module_param_named(dev_size_mb, sdebug_dev_size_mb, int, S_IRUGO);
5570 module_param_named(dif, sdebug_dif, int, S_IRUGO);
5571 module_param_named(dix, sdebug_dix, int, S_IRUGO);
5572 module_param_named(dsense, sdebug_dsense, int, S_IRUGO | S_IWUSR);
5573 module_param_named(every_nth, sdebug_every_nth, int, S_IRUGO | S_IWUSR);
5574 module_param_named(fake_rw, sdebug_fake_rw, int, S_IRUGO | S_IWUSR);
5575 module_param_named(guard, sdebug_guard, uint, S_IRUGO);
5576 module_param_named(host_lock, sdebug_host_lock, bool, S_IRUGO | S_IWUSR);
5577 module_param_named(host_max_queue, sdebug_host_max_queue, int, S_IRUGO);
5578 module_param_string(inq_product, sdebug_inq_product_id,
5579 sizeof(sdebug_inq_product_id), S_IRUGO | S_IWUSR);
5580 module_param_string(inq_rev, sdebug_inq_product_rev,
5581 sizeof(sdebug_inq_product_rev), S_IRUGO | S_IWUSR);
5582 module_param_string(inq_vendor, sdebug_inq_vendor_id,
5583 sizeof(sdebug_inq_vendor_id), S_IRUGO | S_IWUSR);
5584 module_param_named(lbprz, sdebug_lbprz, int, S_IRUGO);
5585 module_param_named(lbpu, sdebug_lbpu, int, S_IRUGO);
5586 module_param_named(lbpws, sdebug_lbpws, int, S_IRUGO);
5587 module_param_named(lbpws10, sdebug_lbpws10, int, S_IRUGO);
5588 module_param_named(lowest_aligned, sdebug_lowest_aligned, int, S_IRUGO);
5589 module_param_named(max_luns, sdebug_max_luns, int, S_IRUGO | S_IWUSR);
5590 module_param_named(max_queue, sdebug_max_queue, int, S_IRUGO | S_IWUSR);
5591 module_param_named(medium_error_count, sdebug_medium_error_count, int,
5592 S_IRUGO | S_IWUSR);
5593 module_param_named(medium_error_start, sdebug_medium_error_start, int,
5594 S_IRUGO | S_IWUSR);
5595 module_param_named(ndelay, sdebug_ndelay, int, S_IRUGO | S_IWUSR);
5596 module_param_named(no_lun_0, sdebug_no_lun_0, int, S_IRUGO | S_IWUSR);
5597 module_param_named(no_uld, sdebug_no_uld, int, S_IRUGO);
5598 module_param_named(num_parts, sdebug_num_parts, int, S_IRUGO);
5599 module_param_named(num_tgts, sdebug_num_tgts, int, S_IRUGO | S_IWUSR);
5600 module_param_named(opt_blks, sdebug_opt_blks, int, S_IRUGO);
5601 module_param_named(opt_xferlen_exp, sdebug_opt_xferlen_exp, int, S_IRUGO);
5602 module_param_named(opts, sdebug_opts, int, S_IRUGO | S_IWUSR);
5603 module_param_named(per_host_store, sdebug_per_host_store, bool,
5604 S_IRUGO | S_IWUSR);
5605 module_param_named(physblk_exp, sdebug_physblk_exp, int, S_IRUGO);
5606 module_param_named(ptype, sdebug_ptype, int, S_IRUGO | S_IWUSR);
5607 module_param_named(random, sdebug_random, bool, S_IRUGO | S_IWUSR);
5608 module_param_named(removable, sdebug_removable, bool, S_IRUGO | S_IWUSR);
5609 module_param_named(scsi_level, sdebug_scsi_level, int, S_IRUGO);
5610 module_param_named(sector_size, sdebug_sector_size, int, S_IRUGO);
5611 module_param_named(statistics, sdebug_statistics, bool, S_IRUGO | S_IWUSR);
5612 module_param_named(strict, sdebug_strict, bool, S_IRUGO | S_IWUSR);
5613 module_param_named(submit_queues, submit_queues, int, S_IRUGO);
5614 module_param_named(tur_ms_to_ready, sdeb_tur_ms_to_ready, int, S_IRUGO);
5615 module_param_named(unmap_alignment, sdebug_unmap_alignment, int, S_IRUGO);
5616 module_param_named(unmap_granularity, sdebug_unmap_granularity, int, S_IRUGO);
5617 module_param_named(unmap_max_blocks, sdebug_unmap_max_blocks, int, S_IRUGO);
5618 module_param_named(unmap_max_desc, sdebug_unmap_max_desc, int, S_IRUGO);
5619 module_param_named(uuid_ctl, sdebug_uuid_ctl, int, S_IRUGO);
5620 module_param_named(virtual_gb, sdebug_virtual_gb, int, S_IRUGO | S_IWUSR);
5621 module_param_named(vpd_use_hostno, sdebug_vpd_use_hostno, int,
5622 S_IRUGO | S_IWUSR);
5623 module_param_named(wp, sdebug_wp, bool, S_IRUGO | S_IWUSR);
5624 module_param_named(write_same_length, sdebug_write_same_length, int,
5625 S_IRUGO | S_IWUSR);
5626 module_param_named(zbc, sdeb_zbc_model_s, charp, S_IRUGO);
5627 module_param_named(zone_max_open, sdeb_zbc_max_open, int, S_IRUGO);
5628 module_param_named(zone_nr_conv, sdeb_zbc_nr_conv, int, S_IRUGO);
5629 module_param_named(zone_size_mb, sdeb_zbc_zone_size_mb, int, S_IRUGO);
5630
5631 MODULE_AUTHOR("Eric Youngdale + Douglas Gilbert");
5632 MODULE_DESCRIPTION("SCSI debug adapter driver");
5633 MODULE_LICENSE("GPL");
5634 MODULE_VERSION(SDEBUG_VERSION);
5635
5636 MODULE_PARM_DESC(add_host, "add n hosts, in sysfs if negative remove host(s) (def=1)");
5637 MODULE_PARM_DESC(ato, "application tag ownership: 0=disk 1=host (def=1)");
5638 MODULE_PARM_DESC(cdb_len, "suggest CDB lengths to drivers (def=10)");
5639 MODULE_PARM_DESC(clustering, "when set enables larger transfers (def=0)");
5640 MODULE_PARM_DESC(delay, "response delay (def=1 jiffy); 0:imm, -1,-2:tiny");
5641 MODULE_PARM_DESC(dev_size_mb, "size in MiB of ram shared by devs(def=8)");
5642 MODULE_PARM_DESC(dif, "data integrity field type: 0-3 (def=0)");
5643 MODULE_PARM_DESC(dix, "data integrity extensions mask (def=0)");
5644 MODULE_PARM_DESC(dsense, "use descriptor sense format(def=0 -> fixed)");
5645 MODULE_PARM_DESC(every_nth, "timeout every nth command(def=0)");
5646 MODULE_PARM_DESC(fake_rw, "fake reads/writes instead of copying (def=0)");
5647 MODULE_PARM_DESC(guard, "protection checksum: 0=crc, 1=ip (def=0)");
5648 MODULE_PARM_DESC(host_lock, "host_lock is ignored (def=0)");
5649 MODULE_PARM_DESC(host_max_queue,
5650 "host max # of queued cmds (0 to max(def) [max_queue fixed equal for !0])");
5651 MODULE_PARM_DESC(inq_product, "SCSI INQUIRY product string (def=\"scsi_debug\")");
5652 MODULE_PARM_DESC(inq_rev, "SCSI INQUIRY revision string (def=\""
5653 SDEBUG_VERSION "\")");
5654 MODULE_PARM_DESC(inq_vendor, "SCSI INQUIRY vendor string (def=\"Linux\")");
5655 MODULE_PARM_DESC(lbprz,
5656 "on read unmapped LBs return 0 when 1 (def), return 0xff when 2");
5657 MODULE_PARM_DESC(lbpu, "enable LBP, support UNMAP command (def=0)");
5658 MODULE_PARM_DESC(lbpws, "enable LBP, support WRITE SAME(16) with UNMAP bit (def=0)");
5659 MODULE_PARM_DESC(lbpws10, "enable LBP, support WRITE SAME(10) with UNMAP bit (def=0)");
5660 MODULE_PARM_DESC(lowest_aligned, "lowest aligned lba (def=0)");
5661 MODULE_PARM_DESC(max_luns, "number of LUNs per target to simulate(def=1)");
5662 MODULE_PARM_DESC(max_queue, "max number of queued commands (1 to max(def))");
5663 MODULE_PARM_DESC(medium_error_count, "count of sectors to return follow on MEDIUM error");
5664 MODULE_PARM_DESC(medium_error_start, "starting sector number to return MEDIUM error");
5665 MODULE_PARM_DESC(ndelay, "response delay in nanoseconds (def=0 -> ignore)");
5666 MODULE_PARM_DESC(no_lun_0, "no LU number 0 (def=0 -> have lun 0)");
5667 MODULE_PARM_DESC(no_uld, "stop ULD (e.g. sd driver) attaching (def=0))");
5668 MODULE_PARM_DESC(num_parts, "number of partitions(def=0)");
5669 MODULE_PARM_DESC(num_tgts, "number of targets per host to simulate(def=1)");
5670 MODULE_PARM_DESC(opt_blks, "optimal transfer length in blocks (def=1024)");
5671 MODULE_PARM_DESC(opt_xferlen_exp, "optimal transfer length granularity exponent (def=physblk_exp)");
5672 MODULE_PARM_DESC(opts, "1->noise, 2->medium_err, 4->timeout, 8->recovered_err... (def=0)");
5673 MODULE_PARM_DESC(per_host_store, "If set, next positive add_host will get new store (def=0)");
5674 MODULE_PARM_DESC(physblk_exp, "physical block exponent (def=0)");
5675 MODULE_PARM_DESC(ptype, "SCSI peripheral type(def=0[disk])");
5676 MODULE_PARM_DESC(random, "If set, uniformly randomize command duration between 0 and delay_in_ns");
5677 MODULE_PARM_DESC(removable, "claim to have removable media (def=0)");
5678 MODULE_PARM_DESC(scsi_level, "SCSI level to simulate(def=7[SPC-5])");
5679 MODULE_PARM_DESC(sector_size, "logical block size in bytes (def=512)");
5680 MODULE_PARM_DESC(statistics, "collect statistics on commands, queues (def=0)");
5681 MODULE_PARM_DESC(strict, "stricter checks: reserved field in cdb (def=0)");
5682 MODULE_PARM_DESC(submit_queues, "support for block multi-queue (def=1)");
5683 MODULE_PARM_DESC(tur_ms_to_ready, "TEST UNIT READY millisecs before initial good status (def=0)");
5684 MODULE_PARM_DESC(unmap_alignment, "lowest aligned thin provisioning lba (def=0)");
5685 MODULE_PARM_DESC(unmap_granularity, "thin provisioning granularity in blocks (def=1)");
5686 MODULE_PARM_DESC(unmap_max_blocks, "max # of blocks can be unmapped in one cmd (def=0xffffffff)");
5687 MODULE_PARM_DESC(unmap_max_desc, "max # of ranges that can be unmapped in one cmd (def=256)");
5688 MODULE_PARM_DESC(uuid_ctl,
5689 "1->use uuid for lu name, 0->don't, 2->all use same (def=0)");
5690 MODULE_PARM_DESC(virtual_gb, "virtual gigabyte (GiB) size (def=0 -> use dev_size_mb)");
5691 MODULE_PARM_DESC(vpd_use_hostno, "0 -> dev ids ignore hostno (def=1 -> unique dev ids)");
5692 MODULE_PARM_DESC(wp, "Write Protect (def=0)");
5693 MODULE_PARM_DESC(write_same_length, "Maximum blocks per WRITE SAME cmd (def=0xffff)");
5694 MODULE_PARM_DESC(zbc, "'none' [0]; 'aware' [1]; 'managed' [2] (def=0). Can have 'host-' prefix");
5695 MODULE_PARM_DESC(zone_max_open, "Maximum number of open zones; [0] for no limit (def=auto)");
5696 MODULE_PARM_DESC(zone_nr_conv, "Number of conventional zones (def=1)");
5697 MODULE_PARM_DESC(zone_size_mb, "Zone size in MiB (def=auto)");
5698
5699 #define SDEBUG_INFO_LEN 256
5700 static char sdebug_info[SDEBUG_INFO_LEN];
5701
5702 static const char *scsi_debug_info(struct Scsi_Host *shp)
5703 {
5704 int k;
5705
5706 k = scnprintf(sdebug_info, SDEBUG_INFO_LEN, "%s: version %s [%s]\n",
5707 my_name, SDEBUG_VERSION, sdebug_version_date);
5708 if (k >= (SDEBUG_INFO_LEN - 1))
5709 return sdebug_info;
5710 scnprintf(sdebug_info + k, SDEBUG_INFO_LEN - k,
5711 " dev_size_mb=%d, opts=0x%x, submit_queues=%d, %s=%d",
5712 sdebug_dev_size_mb, sdebug_opts, submit_queues,
5713 "statistics", (int)sdebug_statistics);
5714 return sdebug_info;
5715 }
5716
5717 /* 'echo <val> > /proc/scsi/scsi_debug/<host_id>' writes to opts */
5718 static int scsi_debug_write_info(struct Scsi_Host *host, char *buffer,
5719 int length)
5720 {
5721 char arr[16];
5722 int opts;
5723 int minLen = length > 15 ? 15 : length;
5724
5725 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
5726 return -EACCES;
5727 memcpy(arr, buffer, minLen);
5728 arr[minLen] = '\0';
5729 if (1 != sscanf(arr, "%d", &opts))
5730 return -EINVAL;
5731 sdebug_opts = opts;
5732 sdebug_verbose = !!(SDEBUG_OPT_NOISE & opts);
5733 sdebug_any_injecting_opt = !!(SDEBUG_OPT_ALL_INJECTING & opts);
5734 if (sdebug_every_nth != 0)
5735 tweak_cmnd_count();
5736 return length;
5737 }
5738
5739 /* Output seen with 'cat /proc/scsi/scsi_debug/<host_id>'. It will be the
5740 * same for each scsi_debug host (if more than one). Some of the counters
5741 * output are not atomics so might be inaccurate in a busy system. */
5742 static int scsi_debug_show_info(struct seq_file *m, struct Scsi_Host *host)
5743 {
5744 int f, j, l;
5745 struct sdebug_queue *sqp;
5746 struct sdebug_host_info *sdhp;
5747
5748 seq_printf(m, "scsi_debug adapter driver, version %s [%s]\n",
5749 SDEBUG_VERSION, sdebug_version_date);
5750 seq_printf(m, "num_tgts=%d, %ssize=%d MB, opts=0x%x, every_nth=%d\n",
5751 sdebug_num_tgts, "shared (ram) ", sdebug_dev_size_mb,
5752 sdebug_opts, sdebug_every_nth);
5753 seq_printf(m, "delay=%d, ndelay=%d, max_luns=%d, sector_size=%d %s\n",
5754 sdebug_jdelay, sdebug_ndelay, sdebug_max_luns,
5755 sdebug_sector_size, "bytes");
5756 seq_printf(m, "cylinders=%d, heads=%d, sectors=%d, command aborts=%d\n",
5757 sdebug_cylinders_per, sdebug_heads, sdebug_sectors_per,
5758 num_aborts);
5759 seq_printf(m, "RESETs: device=%d, target=%d, bus=%d, host=%d\n",
5760 num_dev_resets, num_target_resets, num_bus_resets,
5761 num_host_resets);
5762 seq_printf(m, "dix_reads=%d, dix_writes=%d, dif_errors=%d\n",
5763 dix_reads, dix_writes, dif_errors);
5764 seq_printf(m, "usec_in_jiffy=%lu, statistics=%d\n", TICK_NSEC / 1000,
5765 sdebug_statistics);
5766 seq_printf(m, "cmnd_count=%d, completions=%d, %s=%d, a_tsf=%d\n",
5767 atomic_read(&sdebug_cmnd_count),
5768 atomic_read(&sdebug_completions),
5769 "miss_cpus", atomic_read(&sdebug_miss_cpus),
5770 atomic_read(&sdebug_a_tsf));
5771
5772 seq_printf(m, "submit_queues=%d\n", submit_queues);
5773 for (j = 0, sqp = sdebug_q_arr; j < submit_queues; ++j, ++sqp) {
5774 seq_printf(m, " queue %d:\n", j);
5775 f = find_first_bit(sqp->in_use_bm, sdebug_max_queue);
5776 if (f != sdebug_max_queue) {
5777 l = find_last_bit(sqp->in_use_bm, sdebug_max_queue);
5778 seq_printf(m, " in_use_bm BUSY: %s: %d,%d\n",
5779 "first,last bits", f, l);
5780 }
5781 }
5782
5783 seq_printf(m, "this host_no=%d\n", host->host_no);
5784 if (!xa_empty(per_store_ap)) {
5785 bool niu;
5786 int idx;
5787 unsigned long l_idx;
5788 struct sdeb_store_info *sip;
5789
5790 seq_puts(m, "\nhost list:\n");
5791 j = 0;
5792 list_for_each_entry(sdhp, &sdebug_host_list, host_list) {
5793 idx = sdhp->si_idx;
5794 seq_printf(m, " %d: host_no=%d, si_idx=%d\n", j,
5795 sdhp->shost->host_no, idx);
5796 ++j;
5797 }
5798 seq_printf(m, "\nper_store array [most_recent_idx=%d]:\n",
5799 sdeb_most_recent_idx);
5800 j = 0;
5801 xa_for_each(per_store_ap, l_idx, sip) {
5802 niu = xa_get_mark(per_store_ap, l_idx,
5803 SDEB_XA_NOT_IN_USE);
5804 idx = (int)l_idx;
5805 seq_printf(m, " %d: idx=%d%s\n", j, idx,
5806 (niu ? " not_in_use" : ""));
5807 ++j;
5808 }
5809 }
5810 return 0;
5811 }
5812
5813 static ssize_t delay_show(struct device_driver *ddp, char *buf)
5814 {
5815 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_jdelay);
5816 }
5817 /* Returns -EBUSY if jdelay is being changed and commands are queued. The unit
5818 * of delay is jiffies.
5819 */
5820 static ssize_t delay_store(struct device_driver *ddp, const char *buf,
5821 size_t count)
5822 {
5823 int jdelay, res;
5824
5825 if (count > 0 && sscanf(buf, "%d", &jdelay) == 1) {
5826 res = count;
5827 if (sdebug_jdelay != jdelay) {
5828 int j, k;
5829 struct sdebug_queue *sqp;
5830
5831 block_unblock_all_queues(true);
5832 for (j = 0, sqp = sdebug_q_arr; j < submit_queues;
5833 ++j, ++sqp) {
5834 k = find_first_bit(sqp->in_use_bm,
5835 sdebug_max_queue);
5836 if (k != sdebug_max_queue) {
5837 res = -EBUSY; /* queued commands */
5838 break;
5839 }
5840 }
5841 if (res > 0) {
5842 sdebug_jdelay = jdelay;
5843 sdebug_ndelay = 0;
5844 }
5845 block_unblock_all_queues(false);
5846 }
5847 return res;
5848 }
5849 return -EINVAL;
5850 }
5851 static DRIVER_ATTR_RW(delay);
5852
5853 static ssize_t ndelay_show(struct device_driver *ddp, char *buf)
5854 {
5855 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_ndelay);
5856 }
5857 /* Returns -EBUSY if ndelay is being changed and commands are queued */
5858 /* If > 0 and accepted then sdebug_jdelay is set to JDELAY_OVERRIDDEN */
5859 static ssize_t ndelay_store(struct device_driver *ddp, const char *buf,
5860 size_t count)
5861 {
5862 int ndelay, res;
5863
5864 if ((count > 0) && (1 == sscanf(buf, "%d", &ndelay)) &&
5865 (ndelay >= 0) && (ndelay < (1000 * 1000 * 1000))) {
5866 res = count;
5867 if (sdebug_ndelay != ndelay) {
5868 int j, k;
5869 struct sdebug_queue *sqp;
5870
5871 block_unblock_all_queues(true);
5872 for (j = 0, sqp = sdebug_q_arr; j < submit_queues;
5873 ++j, ++sqp) {
5874 k = find_first_bit(sqp->in_use_bm,
5875 sdebug_max_queue);
5876 if (k != sdebug_max_queue) {
5877 res = -EBUSY; /* queued commands */
5878 break;
5879 }
5880 }
5881 if (res > 0) {
5882 sdebug_ndelay = ndelay;
5883 sdebug_jdelay = ndelay ? JDELAY_OVERRIDDEN
5884 : DEF_JDELAY;
5885 }
5886 block_unblock_all_queues(false);
5887 }
5888 return res;
5889 }
5890 return -EINVAL;
5891 }
5892 static DRIVER_ATTR_RW(ndelay);
5893
5894 static ssize_t opts_show(struct device_driver *ddp, char *buf)
5895 {
5896 return scnprintf(buf, PAGE_SIZE, "0x%x\n", sdebug_opts);
5897 }
5898
5899 static ssize_t opts_store(struct device_driver *ddp, const char *buf,
5900 size_t count)
5901 {
5902 int opts;
5903 char work[20];
5904
5905 if (sscanf(buf, "%10s", work) == 1) {
5906 if (strncasecmp(work, "0x", 2) == 0) {
5907 if (kstrtoint(work + 2, 16, &opts) == 0)
5908 goto opts_done;
5909 } else {
5910 if (kstrtoint(work, 10, &opts) == 0)
5911 goto opts_done;
5912 }
5913 }
5914 return -EINVAL;
5915 opts_done:
5916 sdebug_opts = opts;
5917 sdebug_verbose = !!(SDEBUG_OPT_NOISE & opts);
5918 sdebug_any_injecting_opt = !!(SDEBUG_OPT_ALL_INJECTING & opts);
5919 tweak_cmnd_count();
5920 return count;
5921 }
5922 static DRIVER_ATTR_RW(opts);
5923
5924 static ssize_t ptype_show(struct device_driver *ddp, char *buf)
5925 {
5926 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_ptype);
5927 }
5928 static ssize_t ptype_store(struct device_driver *ddp, const char *buf,
5929 size_t count)
5930 {
5931 int n;
5932
5933 /* Cannot change from or to TYPE_ZBC with sysfs */
5934 if (sdebug_ptype == TYPE_ZBC)
5935 return -EINVAL;
5936
5937 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
5938 if (n == TYPE_ZBC)
5939 return -EINVAL;
5940 sdebug_ptype = n;
5941 return count;
5942 }
5943 return -EINVAL;
5944 }
5945 static DRIVER_ATTR_RW(ptype);
5946
5947 static ssize_t dsense_show(struct device_driver *ddp, char *buf)
5948 {
5949 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_dsense);
5950 }
5951 static ssize_t dsense_store(struct device_driver *ddp, const char *buf,
5952 size_t count)
5953 {
5954 int n;
5955
5956 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
5957 sdebug_dsense = n;
5958 return count;
5959 }
5960 return -EINVAL;
5961 }
5962 static DRIVER_ATTR_RW(dsense);
5963
5964 static ssize_t fake_rw_show(struct device_driver *ddp, char *buf)
5965 {
5966 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_fake_rw);
5967 }
5968 static ssize_t fake_rw_store(struct device_driver *ddp, const char *buf,
5969 size_t count)
5970 {
5971 int n, idx;
5972
5973 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
5974 bool want_store = (n == 0);
5975 struct sdebug_host_info *sdhp;
5976
5977 n = (n > 0);
5978 sdebug_fake_rw = (sdebug_fake_rw > 0);
5979 if (sdebug_fake_rw == n)
5980 return count; /* not transitioning so do nothing */
5981
5982 if (want_store) { /* 1 --> 0 transition, set up store */
5983 if (sdeb_first_idx < 0) {
5984 idx = sdebug_add_store();
5985 if (idx < 0)
5986 return idx;
5987 } else {
5988 idx = sdeb_first_idx;
5989 xa_clear_mark(per_store_ap, idx,
5990 SDEB_XA_NOT_IN_USE);
5991 }
5992 /* make all hosts use same store */
5993 list_for_each_entry(sdhp, &sdebug_host_list,
5994 host_list) {
5995 if (sdhp->si_idx != idx) {
5996 xa_set_mark(per_store_ap, sdhp->si_idx,
5997 SDEB_XA_NOT_IN_USE);
5998 sdhp->si_idx = idx;
5999 }
6000 }
6001 sdeb_most_recent_idx = idx;
6002 } else { /* 0 --> 1 transition is trigger for shrink */
6003 sdebug_erase_all_stores(true /* apart from first */);
6004 }
6005 sdebug_fake_rw = n;
6006 return count;
6007 }
6008 return -EINVAL;
6009 }
6010 static DRIVER_ATTR_RW(fake_rw);
6011
6012 static ssize_t no_lun_0_show(struct device_driver *ddp, char *buf)
6013 {
6014 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_no_lun_0);
6015 }
6016 static ssize_t no_lun_0_store(struct device_driver *ddp, const char *buf,
6017 size_t count)
6018 {
6019 int n;
6020
6021 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
6022 sdebug_no_lun_0 = n;
6023 return count;
6024 }
6025 return -EINVAL;
6026 }
6027 static DRIVER_ATTR_RW(no_lun_0);
6028
6029 static ssize_t num_tgts_show(struct device_driver *ddp, char *buf)
6030 {
6031 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_num_tgts);
6032 }
6033 static ssize_t num_tgts_store(struct device_driver *ddp, const char *buf,
6034 size_t count)
6035 {
6036 int n;
6037
6038 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
6039 sdebug_num_tgts = n;
6040 sdebug_max_tgts_luns();
6041 return count;
6042 }
6043 return -EINVAL;
6044 }
6045 static DRIVER_ATTR_RW(num_tgts);
6046
6047 static ssize_t dev_size_mb_show(struct device_driver *ddp, char *buf)
6048 {
6049 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_dev_size_mb);
6050 }
6051 static DRIVER_ATTR_RO(dev_size_mb);
6052
6053 static ssize_t per_host_store_show(struct device_driver *ddp, char *buf)
6054 {
6055 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_per_host_store);
6056 }
6057
6058 static ssize_t per_host_store_store(struct device_driver *ddp, const char *buf,
6059 size_t count)
6060 {
6061 bool v;
6062
6063 if (kstrtobool(buf, &v))
6064 return -EINVAL;
6065
6066 sdebug_per_host_store = v;
6067 return count;
6068 }
6069 static DRIVER_ATTR_RW(per_host_store);
6070
6071 static ssize_t num_parts_show(struct device_driver *ddp, char *buf)
6072 {
6073 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_num_parts);
6074 }
6075 static DRIVER_ATTR_RO(num_parts);
6076
6077 static ssize_t every_nth_show(struct device_driver *ddp, char *buf)
6078 {
6079 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_every_nth);
6080 }
6081 static ssize_t every_nth_store(struct device_driver *ddp, const char *buf,
6082 size_t count)
6083 {
6084 int nth;
6085 char work[20];
6086
6087 if (sscanf(buf, "%10s", work) == 1) {
6088 if (strncasecmp(work, "0x", 2) == 0) {
6089 if (kstrtoint(work + 2, 16, &nth) == 0)
6090 goto every_nth_done;
6091 } else {
6092 if (kstrtoint(work, 10, &nth) == 0)
6093 goto every_nth_done;
6094 }
6095 }
6096 return -EINVAL;
6097
6098 every_nth_done:
6099 sdebug_every_nth = nth;
6100 if (nth && !sdebug_statistics) {
6101 pr_info("every_nth needs statistics=1, set it\n");
6102 sdebug_statistics = true;
6103 }
6104 tweak_cmnd_count();
6105 return count;
6106 }
6107 static DRIVER_ATTR_RW(every_nth);
6108
6109 static ssize_t max_luns_show(struct device_driver *ddp, char *buf)
6110 {
6111 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_max_luns);
6112 }
6113 static ssize_t max_luns_store(struct device_driver *ddp, const char *buf,
6114 size_t count)
6115 {
6116 int n;
6117 bool changed;
6118
6119 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
6120 if (n > 256) {
6121 pr_warn("max_luns can be no more than 256\n");
6122 return -EINVAL;
6123 }
6124 changed = (sdebug_max_luns != n);
6125 sdebug_max_luns = n;
6126 sdebug_max_tgts_luns();
6127 if (changed && (sdebug_scsi_level >= 5)) { /* >= SPC-3 */
6128 struct sdebug_host_info *sdhp;
6129 struct sdebug_dev_info *dp;
6130
6131 spin_lock(&sdebug_host_list_lock);
6132 list_for_each_entry(sdhp, &sdebug_host_list,
6133 host_list) {
6134 list_for_each_entry(dp, &sdhp->dev_info_list,
6135 dev_list) {
6136 set_bit(SDEBUG_UA_LUNS_CHANGED,
6137 dp->uas_bm);
6138 }
6139 }
6140 spin_unlock(&sdebug_host_list_lock);
6141 }
6142 return count;
6143 }
6144 return -EINVAL;
6145 }
6146 static DRIVER_ATTR_RW(max_luns);
6147
6148 static ssize_t max_queue_show(struct device_driver *ddp, char *buf)
6149 {
6150 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_max_queue);
6151 }
6152 /* N.B. max_queue can be changed while there are queued commands. In flight
6153 * commands beyond the new max_queue will be completed. */
6154 static ssize_t max_queue_store(struct device_driver *ddp, const char *buf,
6155 size_t count)
6156 {
6157 int j, n, k, a;
6158 struct sdebug_queue *sqp;
6159
6160 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n > 0) &&
6161 (n <= SDEBUG_CANQUEUE) &&
6162 (sdebug_host_max_queue == 0)) {
6163 block_unblock_all_queues(true);
6164 k = 0;
6165 for (j = 0, sqp = sdebug_q_arr; j < submit_queues;
6166 ++j, ++sqp) {
6167 a = find_last_bit(sqp->in_use_bm, SDEBUG_CANQUEUE);
6168 if (a > k)
6169 k = a;
6170 }
6171 sdebug_max_queue = n;
6172 if (k == SDEBUG_CANQUEUE)
6173 atomic_set(&retired_max_queue, 0);
6174 else if (k >= n)
6175 atomic_set(&retired_max_queue, k + 1);
6176 else
6177 atomic_set(&retired_max_queue, 0);
6178 block_unblock_all_queues(false);
6179 return count;
6180 }
6181 return -EINVAL;
6182 }
6183 static DRIVER_ATTR_RW(max_queue);
6184
6185 static ssize_t host_max_queue_show(struct device_driver *ddp, char *buf)
6186 {
6187 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_host_max_queue);
6188 }
6189
6190 /*
6191 * Since this is used for .can_queue, and we get the hc_idx tag from the bitmap
6192 * in range [0, sdebug_host_max_queue), we can't change it.
6193 */
6194 static DRIVER_ATTR_RO(host_max_queue);
6195
6196 static ssize_t no_uld_show(struct device_driver *ddp, char *buf)
6197 {
6198 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_no_uld);
6199 }
6200 static DRIVER_ATTR_RO(no_uld);
6201
6202 static ssize_t scsi_level_show(struct device_driver *ddp, char *buf)
6203 {
6204 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_scsi_level);
6205 }
6206 static DRIVER_ATTR_RO(scsi_level);
6207
6208 static ssize_t virtual_gb_show(struct device_driver *ddp, char *buf)
6209 {
6210 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_virtual_gb);
6211 }
6212 static ssize_t virtual_gb_store(struct device_driver *ddp, const char *buf,
6213 size_t count)
6214 {
6215 int n;
6216 bool changed;
6217
6218 /* Ignore capacity change for ZBC drives for now */
6219 if (sdeb_zbc_in_use)
6220 return -ENOTSUPP;
6221
6222 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
6223 changed = (sdebug_virtual_gb != n);
6224 sdebug_virtual_gb = n;
6225 sdebug_capacity = get_sdebug_capacity();
6226 if (changed) {
6227 struct sdebug_host_info *sdhp;
6228 struct sdebug_dev_info *dp;
6229
6230 spin_lock(&sdebug_host_list_lock);
6231 list_for_each_entry(sdhp, &sdebug_host_list,
6232 host_list) {
6233 list_for_each_entry(dp, &sdhp->dev_info_list,
6234 dev_list) {
6235 set_bit(SDEBUG_UA_CAPACITY_CHANGED,
6236 dp->uas_bm);
6237 }
6238 }
6239 spin_unlock(&sdebug_host_list_lock);
6240 }
6241 return count;
6242 }
6243 return -EINVAL;
6244 }
6245 static DRIVER_ATTR_RW(virtual_gb);
6246
6247 static ssize_t add_host_show(struct device_driver *ddp, char *buf)
6248 {
6249 /* absolute number of hosts currently active is what is shown */
6250 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_num_hosts);
6251 }
6252
6253 static ssize_t add_host_store(struct device_driver *ddp, const char *buf,
6254 size_t count)
6255 {
6256 bool found;
6257 unsigned long idx;
6258 struct sdeb_store_info *sip;
6259 bool want_phs = (sdebug_fake_rw == 0) && sdebug_per_host_store;
6260 int delta_hosts;
6261
6262 if (sscanf(buf, "%d", &delta_hosts) != 1)
6263 return -EINVAL;
6264 if (delta_hosts > 0) {
6265 do {
6266 found = false;
6267 if (want_phs) {
6268 xa_for_each_marked(per_store_ap, idx, sip,
6269 SDEB_XA_NOT_IN_USE) {
6270 sdeb_most_recent_idx = (int)idx;
6271 found = true;
6272 break;
6273 }
6274 if (found) /* re-use case */
6275 sdebug_add_host_helper((int)idx);
6276 else
6277 sdebug_do_add_host(true);
6278 } else {
6279 sdebug_do_add_host(false);
6280 }
6281 } while (--delta_hosts);
6282 } else if (delta_hosts < 0) {
6283 do {
6284 sdebug_do_remove_host(false);
6285 } while (++delta_hosts);
6286 }
6287 return count;
6288 }
6289 static DRIVER_ATTR_RW(add_host);
6290
6291 static ssize_t vpd_use_hostno_show(struct device_driver *ddp, char *buf)
6292 {
6293 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_vpd_use_hostno);
6294 }
6295 static ssize_t vpd_use_hostno_store(struct device_driver *ddp, const char *buf,
6296 size_t count)
6297 {
6298 int n;
6299
6300 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
6301 sdebug_vpd_use_hostno = n;
6302 return count;
6303 }
6304 return -EINVAL;
6305 }
6306 static DRIVER_ATTR_RW(vpd_use_hostno);
6307
6308 static ssize_t statistics_show(struct device_driver *ddp, char *buf)
6309 {
6310 return scnprintf(buf, PAGE_SIZE, "%d\n", (int)sdebug_statistics);
6311 }
6312 static ssize_t statistics_store(struct device_driver *ddp, const char *buf,
6313 size_t count)
6314 {
6315 int n;
6316
6317 if ((count > 0) && (sscanf(buf, "%d", &n) == 1) && (n >= 0)) {
6318 if (n > 0)
6319 sdebug_statistics = true;
6320 else {
6321 clear_queue_stats();
6322 sdebug_statistics = false;
6323 }
6324 return count;
6325 }
6326 return -EINVAL;
6327 }
6328 static DRIVER_ATTR_RW(statistics);
6329
6330 static ssize_t sector_size_show(struct device_driver *ddp, char *buf)
6331 {
6332 return scnprintf(buf, PAGE_SIZE, "%u\n", sdebug_sector_size);
6333 }
6334 static DRIVER_ATTR_RO(sector_size);
6335
6336 static ssize_t submit_queues_show(struct device_driver *ddp, char *buf)
6337 {
6338 return scnprintf(buf, PAGE_SIZE, "%d\n", submit_queues);
6339 }
6340 static DRIVER_ATTR_RO(submit_queues);
6341
6342 static ssize_t dix_show(struct device_driver *ddp, char *buf)
6343 {
6344 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_dix);
6345 }
6346 static DRIVER_ATTR_RO(dix);
6347
6348 static ssize_t dif_show(struct device_driver *ddp, char *buf)
6349 {
6350 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_dif);
6351 }
6352 static DRIVER_ATTR_RO(dif);
6353
6354 static ssize_t guard_show(struct device_driver *ddp, char *buf)
6355 {
6356 return scnprintf(buf, PAGE_SIZE, "%u\n", sdebug_guard);
6357 }
6358 static DRIVER_ATTR_RO(guard);
6359
6360 static ssize_t ato_show(struct device_driver *ddp, char *buf)
6361 {
6362 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_ato);
6363 }
6364 static DRIVER_ATTR_RO(ato);
6365
6366 static ssize_t map_show(struct device_driver *ddp, char *buf)
6367 {
6368 ssize_t count = 0;
6369
6370 if (!scsi_debug_lbp())
6371 return scnprintf(buf, PAGE_SIZE, "0-%u\n",
6372 sdebug_store_sectors);
6373
6374 if (sdebug_fake_rw == 0 && !xa_empty(per_store_ap)) {
6375 struct sdeb_store_info *sip = xa_load(per_store_ap, 0);
6376
6377 if (sip)
6378 count = scnprintf(buf, PAGE_SIZE - 1, "%*pbl",
6379 (int)map_size, sip->map_storep);
6380 }
6381 buf[count++] = '\n';
6382 buf[count] = '\0';
6383
6384 return count;
6385 }
6386 static DRIVER_ATTR_RO(map);
6387
6388 static ssize_t random_show(struct device_driver *ddp, char *buf)
6389 {
6390 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_random);
6391 }
6392
6393 static ssize_t random_store(struct device_driver *ddp, const char *buf,
6394 size_t count)
6395 {
6396 bool v;
6397
6398 if (kstrtobool(buf, &v))
6399 return -EINVAL;
6400
6401 sdebug_random = v;
6402 return count;
6403 }
6404 static DRIVER_ATTR_RW(random);
6405
6406 static ssize_t removable_show(struct device_driver *ddp, char *buf)
6407 {
6408 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_removable ? 1 : 0);
6409 }
6410 static ssize_t removable_store(struct device_driver *ddp, const char *buf,
6411 size_t count)
6412 {
6413 int n;
6414
6415 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
6416 sdebug_removable = (n > 0);
6417 return count;
6418 }
6419 return -EINVAL;
6420 }
6421 static DRIVER_ATTR_RW(removable);
6422
6423 static ssize_t host_lock_show(struct device_driver *ddp, char *buf)
6424 {
6425 return scnprintf(buf, PAGE_SIZE, "%d\n", !!sdebug_host_lock);
6426 }
6427 /* N.B. sdebug_host_lock does nothing, kept for backward compatibility */
6428 static ssize_t host_lock_store(struct device_driver *ddp, const char *buf,
6429 size_t count)
6430 {
6431 int n;
6432
6433 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
6434 sdebug_host_lock = (n > 0);
6435 return count;
6436 }
6437 return -EINVAL;
6438 }
6439 static DRIVER_ATTR_RW(host_lock);
6440
6441 static ssize_t strict_show(struct device_driver *ddp, char *buf)
6442 {
6443 return scnprintf(buf, PAGE_SIZE, "%d\n", !!sdebug_strict);
6444 }
6445 static ssize_t strict_store(struct device_driver *ddp, const char *buf,
6446 size_t count)
6447 {
6448 int n;
6449
6450 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) {
6451 sdebug_strict = (n > 0);
6452 return count;
6453 }
6454 return -EINVAL;
6455 }
6456 static DRIVER_ATTR_RW(strict);
6457
6458 static ssize_t uuid_ctl_show(struct device_driver *ddp, char *buf)
6459 {
6460 return scnprintf(buf, PAGE_SIZE, "%d\n", !!sdebug_uuid_ctl);
6461 }
6462 static DRIVER_ATTR_RO(uuid_ctl);
6463
6464 static ssize_t cdb_len_show(struct device_driver *ddp, char *buf)
6465 {
6466 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_cdb_len);
6467 }
6468 static ssize_t cdb_len_store(struct device_driver *ddp, const char *buf,
6469 size_t count)
6470 {
6471 int ret, n;
6472
6473 ret = kstrtoint(buf, 0, &n);
6474 if (ret)
6475 return ret;
6476 sdebug_cdb_len = n;
6477 all_config_cdb_len();
6478 return count;
6479 }
6480 static DRIVER_ATTR_RW(cdb_len);
6481
6482 static const char * const zbc_model_strs_a[] = {
6483 [BLK_ZONED_NONE] = "none",
6484 [BLK_ZONED_HA] = "host-aware",
6485 [BLK_ZONED_HM] = "host-managed",
6486 };
6487
6488 static const char * const zbc_model_strs_b[] = {
6489 [BLK_ZONED_NONE] = "no",
6490 [BLK_ZONED_HA] = "aware",
6491 [BLK_ZONED_HM] = "managed",
6492 };
6493
6494 static const char * const zbc_model_strs_c[] = {
6495 [BLK_ZONED_NONE] = "0",
6496 [BLK_ZONED_HA] = "1",
6497 [BLK_ZONED_HM] = "2",
6498 };
6499
6500 static int sdeb_zbc_model_str(const char *cp)
6501 {
6502 int res = sysfs_match_string(zbc_model_strs_a, cp);
6503
6504 if (res < 0) {
6505 res = sysfs_match_string(zbc_model_strs_b, cp);
6506 if (res < 0) {
6507 res = sysfs_match_string(zbc_model_strs_c, cp);
6508 if (res < 0)
6509 return -EINVAL;
6510 }
6511 }
6512 return res;
6513 }
6514
6515 static ssize_t zbc_show(struct device_driver *ddp, char *buf)
6516 {
6517 return scnprintf(buf, PAGE_SIZE, "%s\n",
6518 zbc_model_strs_a[sdeb_zbc_model]);
6519 }
6520 static DRIVER_ATTR_RO(zbc);
6521
6522 static ssize_t tur_ms_to_ready_show(struct device_driver *ddp, char *buf)
6523 {
6524 return scnprintf(buf, PAGE_SIZE, "%d\n", sdeb_tur_ms_to_ready);
6525 }
6526 static DRIVER_ATTR_RO(tur_ms_to_ready);
6527
6528 /* Note: The following array creates attribute files in the
6529 /sys/bus/pseudo/drivers/scsi_debug directory. The advantage of these
6530 files (over those found in the /sys/module/scsi_debug/parameters
6531 directory) is that auxiliary actions can be triggered when an attribute
6532 is changed. For example see: add_host_store() above.
6533 */
6534
6535 static struct attribute *sdebug_drv_attrs[] = {
6536 &driver_attr_delay.attr,
6537 &driver_attr_opts.attr,
6538 &driver_attr_ptype.attr,
6539 &driver_attr_dsense.attr,
6540 &driver_attr_fake_rw.attr,
6541 &driver_attr_host_max_queue.attr,
6542 &driver_attr_no_lun_0.attr,
6543 &driver_attr_num_tgts.attr,
6544 &driver_attr_dev_size_mb.attr,
6545 &driver_attr_num_parts.attr,
6546 &driver_attr_every_nth.attr,
6547 &driver_attr_max_luns.attr,
6548 &driver_attr_max_queue.attr,
6549 &driver_attr_no_uld.attr,
6550 &driver_attr_scsi_level.attr,
6551 &driver_attr_virtual_gb.attr,
6552 &driver_attr_add_host.attr,
6553 &driver_attr_per_host_store.attr,
6554 &driver_attr_vpd_use_hostno.attr,
6555 &driver_attr_sector_size.attr,
6556 &driver_attr_statistics.attr,
6557 &driver_attr_submit_queues.attr,
6558 &driver_attr_dix.attr,
6559 &driver_attr_dif.attr,
6560 &driver_attr_guard.attr,
6561 &driver_attr_ato.attr,
6562 &driver_attr_map.attr,
6563 &driver_attr_random.attr,
6564 &driver_attr_removable.attr,
6565 &driver_attr_host_lock.attr,
6566 &driver_attr_ndelay.attr,
6567 &driver_attr_strict.attr,
6568 &driver_attr_uuid_ctl.attr,
6569 &driver_attr_cdb_len.attr,
6570 &driver_attr_tur_ms_to_ready.attr,
6571 &driver_attr_zbc.attr,
6572 NULL,
6573 };
6574 ATTRIBUTE_GROUPS(sdebug_drv);
6575
6576 static struct device *pseudo_primary;
6577
6578 static int __init scsi_debug_init(void)
6579 {
6580 bool want_store = (sdebug_fake_rw == 0);
6581 unsigned long sz;
6582 int k, ret, hosts_to_add;
6583 int idx = -1;
6584
6585 ramdisk_lck_a[0] = &atomic_rw;
6586 ramdisk_lck_a[1] = &atomic_rw2;
6587 atomic_set(&retired_max_queue, 0);
6588
6589 if (sdebug_ndelay >= 1000 * 1000 * 1000) {
6590 pr_warn("ndelay must be less than 1 second, ignored\n");
6591 sdebug_ndelay = 0;
6592 } else if (sdebug_ndelay > 0)
6593 sdebug_jdelay = JDELAY_OVERRIDDEN;
6594
6595 switch (sdebug_sector_size) {
6596 case 512:
6597 case 1024:
6598 case 2048:
6599 case 4096:
6600 break;
6601 default:
6602 pr_err("invalid sector_size %d\n", sdebug_sector_size);
6603 return -EINVAL;
6604 }
6605
6606 switch (sdebug_dif) {
6607 case T10_PI_TYPE0_PROTECTION:
6608 break;
6609 case T10_PI_TYPE1_PROTECTION:
6610 case T10_PI_TYPE2_PROTECTION:
6611 case T10_PI_TYPE3_PROTECTION:
6612 have_dif_prot = true;
6613 break;
6614
6615 default:
6616 pr_err("dif must be 0, 1, 2 or 3\n");
6617 return -EINVAL;
6618 }
6619
6620 if (sdebug_num_tgts < 0) {
6621 pr_err("num_tgts must be >= 0\n");
6622 return -EINVAL;
6623 }
6624
6625 if (sdebug_guard > 1) {
6626 pr_err("guard must be 0 or 1\n");
6627 return -EINVAL;
6628 }
6629
6630 if (sdebug_ato > 1) {
6631 pr_err("ato must be 0 or 1\n");
6632 return -EINVAL;
6633 }
6634
6635 if (sdebug_physblk_exp > 15) {
6636 pr_err("invalid physblk_exp %u\n", sdebug_physblk_exp);
6637 return -EINVAL;
6638 }
6639 if (sdebug_max_luns > 256) {
6640 pr_warn("max_luns can be no more than 256, use default\n");
6641 sdebug_max_luns = DEF_MAX_LUNS;
6642 }
6643
6644 if (sdebug_lowest_aligned > 0x3fff) {
6645 pr_err("lowest_aligned too big: %u\n", sdebug_lowest_aligned);
6646 return -EINVAL;
6647 }
6648
6649 if (submit_queues < 1) {
6650 pr_err("submit_queues must be 1 or more\n");
6651 return -EINVAL;
6652 }
6653
6654 if ((sdebug_max_queue > SDEBUG_CANQUEUE) || (sdebug_max_queue < 1)) {
6655 pr_err("max_queue must be in range [1, %d]\n", SDEBUG_CANQUEUE);
6656 return -EINVAL;
6657 }
6658
6659 if ((sdebug_host_max_queue > SDEBUG_CANQUEUE) ||
6660 (sdebug_host_max_queue < 0)) {
6661 pr_err("host_max_queue must be in range [0 %d]\n",
6662 SDEBUG_CANQUEUE);
6663 return -EINVAL;
6664 }
6665
6666 if (sdebug_host_max_queue &&
6667 (sdebug_max_queue != sdebug_host_max_queue)) {
6668 sdebug_max_queue = sdebug_host_max_queue;
6669 pr_warn("fixing max submit queue depth to host max queue depth, %d\n",
6670 sdebug_max_queue);
6671 }
6672
6673 sdebug_q_arr = kcalloc(submit_queues, sizeof(struct sdebug_queue),
6674 GFP_KERNEL);
6675 if (sdebug_q_arr == NULL)
6676 return -ENOMEM;
6677 for (k = 0; k < submit_queues; ++k)
6678 spin_lock_init(&sdebug_q_arr[k].qc_lock);
6679
6680 /*
6681 * check for host managed zoned block device specified with
6682 * ptype=0x14 or zbc=XXX.
6683 */
6684 if (sdebug_ptype == TYPE_ZBC) {
6685 sdeb_zbc_model = BLK_ZONED_HM;
6686 } else if (sdeb_zbc_model_s && *sdeb_zbc_model_s) {
6687 k = sdeb_zbc_model_str(sdeb_zbc_model_s);
6688 if (k < 0) {
6689 ret = k;
6690 goto free_vm;
6691 }
6692 sdeb_zbc_model = k;
6693 switch (sdeb_zbc_model) {
6694 case BLK_ZONED_NONE:
6695 case BLK_ZONED_HA:
6696 sdebug_ptype = TYPE_DISK;
6697 break;
6698 case BLK_ZONED_HM:
6699 sdebug_ptype = TYPE_ZBC;
6700 break;
6701 default:
6702 pr_err("Invalid ZBC model\n");
6703 return -EINVAL;
6704 }
6705 }
6706 if (sdeb_zbc_model != BLK_ZONED_NONE) {
6707 sdeb_zbc_in_use = true;
6708 if (sdebug_dev_size_mb == DEF_DEV_SIZE_PRE_INIT)
6709 sdebug_dev_size_mb = DEF_ZBC_DEV_SIZE_MB;
6710 }
6711
6712 if (sdebug_dev_size_mb == DEF_DEV_SIZE_PRE_INIT)
6713 sdebug_dev_size_mb = DEF_DEV_SIZE_MB;
6714 if (sdebug_dev_size_mb < 1)
6715 sdebug_dev_size_mb = 1; /* force minimum 1 MB ramdisk */
6716 sz = (unsigned long)sdebug_dev_size_mb * 1048576;
6717 sdebug_store_sectors = sz / sdebug_sector_size;
6718 sdebug_capacity = get_sdebug_capacity();
6719
6720 /* play around with geometry, don't waste too much on track 0 */
6721 sdebug_heads = 8;
6722 sdebug_sectors_per = 32;
6723 if (sdebug_dev_size_mb >= 256)
6724 sdebug_heads = 64;
6725 else if (sdebug_dev_size_mb >= 16)
6726 sdebug_heads = 32;
6727 sdebug_cylinders_per = (unsigned long)sdebug_capacity /
6728 (sdebug_sectors_per * sdebug_heads);
6729 if (sdebug_cylinders_per >= 1024) {
6730 /* other LLDs do this; implies >= 1GB ram disk ... */
6731 sdebug_heads = 255;
6732 sdebug_sectors_per = 63;
6733 sdebug_cylinders_per = (unsigned long)sdebug_capacity /
6734 (sdebug_sectors_per * sdebug_heads);
6735 }
6736 if (scsi_debug_lbp()) {
6737 sdebug_unmap_max_blocks =
6738 clamp(sdebug_unmap_max_blocks, 0U, 0xffffffffU);
6739
6740 sdebug_unmap_max_desc =
6741 clamp(sdebug_unmap_max_desc, 0U, 256U);
6742
6743 sdebug_unmap_granularity =
6744 clamp(sdebug_unmap_granularity, 1U, 0xffffffffU);
6745
6746 if (sdebug_unmap_alignment &&
6747 sdebug_unmap_granularity <=
6748 sdebug_unmap_alignment) {
6749 pr_err("ERR: unmap_granularity <= unmap_alignment\n");
6750 ret = -EINVAL;
6751 goto free_q_arr;
6752 }
6753 }
6754 xa_init_flags(per_store_ap, XA_FLAGS_ALLOC | XA_FLAGS_LOCK_IRQ);
6755 if (want_store) {
6756 idx = sdebug_add_store();
6757 if (idx < 0) {
6758 ret = idx;
6759 goto free_q_arr;
6760 }
6761 }
6762
6763 pseudo_primary = root_device_register("pseudo_0");
6764 if (IS_ERR(pseudo_primary)) {
6765 pr_warn("root_device_register() error\n");
6766 ret = PTR_ERR(pseudo_primary);
6767 goto free_vm;
6768 }
6769 ret = bus_register(&pseudo_lld_bus);
6770 if (ret < 0) {
6771 pr_warn("bus_register error: %d\n", ret);
6772 goto dev_unreg;
6773 }
6774 ret = driver_register(&sdebug_driverfs_driver);
6775 if (ret < 0) {
6776 pr_warn("driver_register error: %d\n", ret);
6777 goto bus_unreg;
6778 }
6779
6780 hosts_to_add = sdebug_add_host;
6781 sdebug_add_host = 0;
6782
6783 for (k = 0; k < hosts_to_add; k++) {
6784 if (want_store && k == 0) {
6785 ret = sdebug_add_host_helper(idx);
6786 if (ret < 0) {
6787 pr_err("add_host_helper k=%d, error=%d\n",
6788 k, -ret);
6789 break;
6790 }
6791 } else {
6792 ret = sdebug_do_add_host(want_store &&
6793 sdebug_per_host_store);
6794 if (ret < 0) {
6795 pr_err("add_host k=%d error=%d\n", k, -ret);
6796 break;
6797 }
6798 }
6799 }
6800 if (sdebug_verbose)
6801 pr_info("built %d host(s)\n", sdebug_num_hosts);
6802
6803 return 0;
6804
6805 bus_unreg:
6806 bus_unregister(&pseudo_lld_bus);
6807 dev_unreg:
6808 root_device_unregister(pseudo_primary);
6809 free_vm:
6810 sdebug_erase_store(idx, NULL);
6811 free_q_arr:
6812 kfree(sdebug_q_arr);
6813 return ret;
6814 }
6815
6816 static void __exit scsi_debug_exit(void)
6817 {
6818 int k = sdebug_num_hosts;
6819
6820 stop_all_queued();
6821 for (; k; k--)
6822 sdebug_do_remove_host(true);
6823 free_all_queued();
6824 driver_unregister(&sdebug_driverfs_driver);
6825 bus_unregister(&pseudo_lld_bus);
6826 root_device_unregister(pseudo_primary);
6827
6828 sdebug_erase_all_stores(false);
6829 xa_destroy(per_store_ap);
6830 }
6831
6832 device_initcall(scsi_debug_init);
6833 module_exit(scsi_debug_exit);
6834
6835 static void sdebug_release_adapter(struct device *dev)
6836 {
6837 struct sdebug_host_info *sdbg_host;
6838
6839 sdbg_host = to_sdebug_host(dev);
6840 kfree(sdbg_host);
6841 }
6842
6843 /* idx must be valid, if sip is NULL then it will be obtained using idx */
6844 static void sdebug_erase_store(int idx, struct sdeb_store_info *sip)
6845 {
6846 if (idx < 0)
6847 return;
6848 if (!sip) {
6849 if (xa_empty(per_store_ap))
6850 return;
6851 sip = xa_load(per_store_ap, idx);
6852 if (!sip)
6853 return;
6854 }
6855 vfree(sip->map_storep);
6856 vfree(sip->dif_storep);
6857 vfree(sip->storep);
6858 xa_erase(per_store_ap, idx);
6859 kfree(sip);
6860 }
6861
6862 /* Assume apart_from_first==false only in shutdown case. */
6863 static void sdebug_erase_all_stores(bool apart_from_first)
6864 {
6865 unsigned long idx;
6866 struct sdeb_store_info *sip = NULL;
6867
6868 xa_for_each(per_store_ap, idx, sip) {
6869 if (apart_from_first)
6870 apart_from_first = false;
6871 else
6872 sdebug_erase_store(idx, sip);
6873 }
6874 if (apart_from_first)
6875 sdeb_most_recent_idx = sdeb_first_idx;
6876 }
6877
6878 /*
6879 * Returns store xarray new element index (idx) if >=0 else negated errno.
6880 * Limit the number of stores to 65536.
6881 */
6882 static int sdebug_add_store(void)
6883 {
6884 int res;
6885 u32 n_idx;
6886 unsigned long iflags;
6887 unsigned long sz = (unsigned long)sdebug_dev_size_mb * 1048576;
6888 struct sdeb_store_info *sip = NULL;
6889 struct xa_limit xal = { .max = 1 << 16, .min = 0 };
6890
6891 sip = kzalloc(sizeof(*sip), GFP_KERNEL);
6892 if (!sip)
6893 return -ENOMEM;
6894
6895 xa_lock_irqsave(per_store_ap, iflags);
6896 res = __xa_alloc(per_store_ap, &n_idx, sip, xal, GFP_ATOMIC);
6897 if (unlikely(res < 0)) {
6898 xa_unlock_irqrestore(per_store_ap, iflags);
6899 kfree(sip);
6900 pr_warn("%s: xa_alloc() errno=%d\n", __func__, -res);
6901 return res;
6902 }
6903 sdeb_most_recent_idx = n_idx;
6904 if (sdeb_first_idx < 0)
6905 sdeb_first_idx = n_idx;
6906 xa_unlock_irqrestore(per_store_ap, iflags);
6907
6908 res = -ENOMEM;
6909 sip->storep = vzalloc(sz);
6910 if (!sip->storep) {
6911 pr_err("user data oom\n");
6912 goto err;
6913 }
6914 if (sdebug_num_parts > 0)
6915 sdebug_build_parts(sip->storep, sz);
6916
6917 /* DIF/DIX: what T10 calls Protection Information (PI) */
6918 if (sdebug_dix) {
6919 int dif_size;
6920
6921 dif_size = sdebug_store_sectors * sizeof(struct t10_pi_tuple);
6922 sip->dif_storep = vmalloc(dif_size);
6923
6924 pr_info("dif_storep %u bytes @ %pK\n", dif_size,
6925 sip->dif_storep);
6926
6927 if (!sip->dif_storep) {
6928 pr_err("DIX oom\n");
6929 goto err;
6930 }
6931 memset(sip->dif_storep, 0xff, dif_size);
6932 }
6933 /* Logical Block Provisioning */
6934 if (scsi_debug_lbp()) {
6935 map_size = lba_to_map_index(sdebug_store_sectors - 1) + 1;
6936 sip->map_storep = vmalloc(array_size(sizeof(long),
6937 BITS_TO_LONGS(map_size)));
6938
6939 pr_info("%lu provisioning blocks\n", map_size);
6940
6941 if (!sip->map_storep) {
6942 pr_err("LBP map oom\n");
6943 goto err;
6944 }
6945
6946 bitmap_zero(sip->map_storep, map_size);
6947
6948 /* Map first 1KB for partition table */
6949 if (sdebug_num_parts)
6950 map_region(sip, 0, 2);
6951 }
6952
6953 rwlock_init(&sip->macc_lck);
6954 return (int)n_idx;
6955 err:
6956 sdebug_erase_store((int)n_idx, sip);
6957 pr_warn("%s: failed, errno=%d\n", __func__, -res);
6958 return res;
6959 }
6960
6961 static int sdebug_add_host_helper(int per_host_idx)
6962 {
6963 int k, devs_per_host, idx;
6964 int error = -ENOMEM;
6965 struct sdebug_host_info *sdbg_host;
6966 struct sdebug_dev_info *sdbg_devinfo, *tmp;
6967
6968 sdbg_host = kzalloc(sizeof(*sdbg_host), GFP_KERNEL);
6969 if (!sdbg_host)
6970 return -ENOMEM;
6971 idx = (per_host_idx < 0) ? sdeb_first_idx : per_host_idx;
6972 if (xa_get_mark(per_store_ap, idx, SDEB_XA_NOT_IN_USE))
6973 xa_clear_mark(per_store_ap, idx, SDEB_XA_NOT_IN_USE);
6974 sdbg_host->si_idx = idx;
6975
6976 INIT_LIST_HEAD(&sdbg_host->dev_info_list);
6977
6978 devs_per_host = sdebug_num_tgts * sdebug_max_luns;
6979 for (k = 0; k < devs_per_host; k++) {
6980 sdbg_devinfo = sdebug_device_create(sdbg_host, GFP_KERNEL);
6981 if (!sdbg_devinfo)
6982 goto clean;
6983 }
6984
6985 spin_lock(&sdebug_host_list_lock);
6986 list_add_tail(&sdbg_host->host_list, &sdebug_host_list);
6987 spin_unlock(&sdebug_host_list_lock);
6988
6989 sdbg_host->dev.bus = &pseudo_lld_bus;
6990 sdbg_host->dev.parent = pseudo_primary;
6991 sdbg_host->dev.release = &sdebug_release_adapter;
6992 dev_set_name(&sdbg_host->dev, "adapter%d", sdebug_num_hosts);
6993
6994 error = device_register(&sdbg_host->dev);
6995 if (error)
6996 goto clean;
6997
6998 ++sdebug_num_hosts;
6999 return 0;
7000
7001 clean:
7002 list_for_each_entry_safe(sdbg_devinfo, tmp, &sdbg_host->dev_info_list,
7003 dev_list) {
7004 list_del(&sdbg_devinfo->dev_list);
7005 kfree(sdbg_devinfo->zstate);
7006 kfree(sdbg_devinfo);
7007 }
7008 kfree(sdbg_host);
7009 pr_warn("%s: failed, errno=%d\n", __func__, -error);
7010 return error;
7011 }
7012
7013 static int sdebug_do_add_host(bool mk_new_store)
7014 {
7015 int ph_idx = sdeb_most_recent_idx;
7016
7017 if (mk_new_store) {
7018 ph_idx = sdebug_add_store();
7019 if (ph_idx < 0)
7020 return ph_idx;
7021 }
7022 return sdebug_add_host_helper(ph_idx);
7023 }
7024
7025 static void sdebug_do_remove_host(bool the_end)
7026 {
7027 int idx = -1;
7028 struct sdebug_host_info *sdbg_host = NULL;
7029 struct sdebug_host_info *sdbg_host2;
7030
7031 spin_lock(&sdebug_host_list_lock);
7032 if (!list_empty(&sdebug_host_list)) {
7033 sdbg_host = list_entry(sdebug_host_list.prev,
7034 struct sdebug_host_info, host_list);
7035 idx = sdbg_host->si_idx;
7036 }
7037 if (!the_end && idx >= 0) {
7038 bool unique = true;
7039
7040 list_for_each_entry(sdbg_host2, &sdebug_host_list, host_list) {
7041 if (sdbg_host2 == sdbg_host)
7042 continue;
7043 if (idx == sdbg_host2->si_idx) {
7044 unique = false;
7045 break;
7046 }
7047 }
7048 if (unique) {
7049 xa_set_mark(per_store_ap, idx, SDEB_XA_NOT_IN_USE);
7050 if (idx == sdeb_most_recent_idx)
7051 --sdeb_most_recent_idx;
7052 }
7053 }
7054 if (sdbg_host)
7055 list_del(&sdbg_host->host_list);
7056 spin_unlock(&sdebug_host_list_lock);
7057
7058 if (!sdbg_host)
7059 return;
7060
7061 device_unregister(&sdbg_host->dev);
7062 --sdebug_num_hosts;
7063 }
7064
7065 static int sdebug_change_qdepth(struct scsi_device *sdev, int qdepth)
7066 {
7067 int num_in_q = 0;
7068 struct sdebug_dev_info *devip;
7069
7070 block_unblock_all_queues(true);
7071 devip = (struct sdebug_dev_info *)sdev->hostdata;
7072 if (NULL == devip) {
7073 block_unblock_all_queues(false);
7074 return -ENODEV;
7075 }
7076 num_in_q = atomic_read(&devip->num_in_q);
7077
7078 if (qdepth < 1)
7079 qdepth = 1;
7080 /* allow to exceed max host qc_arr elements for testing */
7081 if (qdepth > SDEBUG_CANQUEUE + 10)
7082 qdepth = SDEBUG_CANQUEUE + 10;
7083 scsi_change_queue_depth(sdev, qdepth);
7084
7085 if (SDEBUG_OPT_Q_NOISE & sdebug_opts) {
7086 sdev_printk(KERN_INFO, sdev, "%s: qdepth=%d, num_in_q=%d\n",
7087 __func__, qdepth, num_in_q);
7088 }
7089 block_unblock_all_queues(false);
7090 return sdev->queue_depth;
7091 }
7092
7093 static bool fake_timeout(struct scsi_cmnd *scp)
7094 {
7095 if (0 == (atomic_read(&sdebug_cmnd_count) % abs(sdebug_every_nth))) {
7096 if (sdebug_every_nth < -1)
7097 sdebug_every_nth = -1;
7098 if (SDEBUG_OPT_TIMEOUT & sdebug_opts)
7099 return true; /* ignore command causing timeout */
7100 else if (SDEBUG_OPT_MAC_TIMEOUT & sdebug_opts &&
7101 scsi_medium_access_command(scp))
7102 return true; /* time out reads and writes */
7103 }
7104 return false;
7105 }
7106
7107 /* Response to TUR or media access command when device stopped */
7108 static int resp_not_ready(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
7109 {
7110 int stopped_state;
7111 u64 diff_ns = 0;
7112 ktime_t now_ts = ktime_get_boottime();
7113 struct scsi_device *sdp = scp->device;
7114
7115 stopped_state = atomic_read(&devip->stopped);
7116 if (stopped_state == 2) {
7117 if (ktime_to_ns(now_ts) > ktime_to_ns(devip->create_ts)) {
7118 diff_ns = ktime_to_ns(ktime_sub(now_ts, devip->create_ts));
7119 if (diff_ns >= ((u64)sdeb_tur_ms_to_ready * 1000000)) {
7120 /* tur_ms_to_ready timer extinguished */
7121 atomic_set(&devip->stopped, 0);
7122 return 0;
7123 }
7124 }
7125 mk_sense_buffer(scp, NOT_READY, LOGICAL_UNIT_NOT_READY, 0x1);
7126 if (sdebug_verbose)
7127 sdev_printk(KERN_INFO, sdp,
7128 "%s: Not ready: in process of becoming ready\n", my_name);
7129 if (scp->cmnd[0] == TEST_UNIT_READY) {
7130 u64 tur_nanosecs_to_ready = (u64)sdeb_tur_ms_to_ready * 1000000;
7131
7132 if (diff_ns <= tur_nanosecs_to_ready)
7133 diff_ns = tur_nanosecs_to_ready - diff_ns;
7134 else
7135 diff_ns = tur_nanosecs_to_ready;
7136 /* As per 20-061r2 approved for spc6 by T10 on 20200716 */
7137 do_div(diff_ns, 1000000); /* diff_ns becomes milliseconds */
7138 scsi_set_sense_information(scp->sense_buffer, SCSI_SENSE_BUFFERSIZE,
7139 diff_ns);
7140 return check_condition_result;
7141 }
7142 }
7143 mk_sense_buffer(scp, NOT_READY, LOGICAL_UNIT_NOT_READY, 0x2);
7144 if (sdebug_verbose)
7145 sdev_printk(KERN_INFO, sdp, "%s: Not ready: initializing command required\n",
7146 my_name);
7147 return check_condition_result;
7148 }
7149
7150 static int scsi_debug_queuecommand(struct Scsi_Host *shost,
7151 struct scsi_cmnd *scp)
7152 {
7153 u8 sdeb_i;
7154 struct scsi_device *sdp = scp->device;
7155 const struct opcode_info_t *oip;
7156 const struct opcode_info_t *r_oip;
7157 struct sdebug_dev_info *devip;
7158 u8 *cmd = scp->cmnd;
7159 int (*r_pfp)(struct scsi_cmnd *, struct sdebug_dev_info *);
7160 int (*pfp)(struct scsi_cmnd *, struct sdebug_dev_info *) = NULL;
7161 int k, na;
7162 int errsts = 0;
7163 u32 flags;
7164 u16 sa;
7165 u8 opcode = cmd[0];
7166 bool has_wlun_rl;
7167 bool inject_now;
7168
7169 scsi_set_resid(scp, 0);
7170 if (sdebug_statistics) {
7171 atomic_inc(&sdebug_cmnd_count);
7172 inject_now = inject_on_this_cmd();
7173 } else {
7174 inject_now = false;
7175 }
7176 if (unlikely(sdebug_verbose &&
7177 !(SDEBUG_OPT_NO_CDB_NOISE & sdebug_opts))) {
7178 char b[120];
7179 int n, len, sb;
7180
7181 len = scp->cmd_len;
7182 sb = (int)sizeof(b);
7183 if (len > 32)
7184 strcpy(b, "too long, over 32 bytes");
7185 else {
7186 for (k = 0, n = 0; k < len && n < sb; ++k)
7187 n += scnprintf(b + n, sb - n, "%02x ",
7188 (u32)cmd[k]);
7189 }
7190 sdev_printk(KERN_INFO, sdp, "%s: tag=%#x, cmd %s\n", my_name,
7191 blk_mq_unique_tag(scp->request), b);
7192 }
7193 if (unlikely(inject_now && (sdebug_opts & SDEBUG_OPT_HOST_BUSY)))
7194 return SCSI_MLQUEUE_HOST_BUSY;
7195 has_wlun_rl = (sdp->lun == SCSI_W_LUN_REPORT_LUNS);
7196 if (unlikely((sdp->lun >= sdebug_max_luns) && !has_wlun_rl))
7197 goto err_out;
7198
7199 sdeb_i = opcode_ind_arr[opcode]; /* fully mapped */
7200 oip = &opcode_info_arr[sdeb_i]; /* safe if table consistent */
7201 devip = (struct sdebug_dev_info *)sdp->hostdata;
7202 if (unlikely(!devip)) {
7203 devip = find_build_dev_info(sdp);
7204 if (NULL == devip)
7205 goto err_out;
7206 }
7207 if (unlikely(inject_now && !atomic_read(&sdeb_inject_pending)))
7208 atomic_set(&sdeb_inject_pending, 1);
7209
7210 na = oip->num_attached;
7211 r_pfp = oip->pfp;
7212 if (na) { /* multiple commands with this opcode */
7213 r_oip = oip;
7214 if (FF_SA & r_oip->flags) {
7215 if (F_SA_LOW & oip->flags)
7216 sa = 0x1f & cmd[1];
7217 else
7218 sa = get_unaligned_be16(cmd + 8);
7219 for (k = 0; k <= na; oip = r_oip->arrp + k++) {
7220 if (opcode == oip->opcode && sa == oip->sa)
7221 break;
7222 }
7223 } else { /* since no service action only check opcode */
7224 for (k = 0; k <= na; oip = r_oip->arrp + k++) {
7225 if (opcode == oip->opcode)
7226 break;
7227 }
7228 }
7229 if (k > na) {
7230 if (F_SA_LOW & r_oip->flags)
7231 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 4);
7232 else if (F_SA_HIGH & r_oip->flags)
7233 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 8, 7);
7234 else
7235 mk_sense_invalid_opcode(scp);
7236 goto check_cond;
7237 }
7238 } /* else (when na==0) we assume the oip is a match */
7239 flags = oip->flags;
7240 if (unlikely(F_INV_OP & flags)) {
7241 mk_sense_invalid_opcode(scp);
7242 goto check_cond;
7243 }
7244 if (unlikely(has_wlun_rl && !(F_RL_WLUN_OK & flags))) {
7245 if (sdebug_verbose)
7246 sdev_printk(KERN_INFO, sdp, "%s: Opcode 0x%x not%s\n",
7247 my_name, opcode, " supported for wlun");
7248 mk_sense_invalid_opcode(scp);
7249 goto check_cond;
7250 }
7251 if (unlikely(sdebug_strict)) { /* check cdb against mask */
7252 u8 rem;
7253 int j;
7254
7255 for (k = 1; k < oip->len_mask[0] && k < 16; ++k) {
7256 rem = ~oip->len_mask[k] & cmd[k];
7257 if (rem) {
7258 for (j = 7; j >= 0; --j, rem <<= 1) {
7259 if (0x80 & rem)
7260 break;
7261 }
7262 mk_sense_invalid_fld(scp, SDEB_IN_CDB, k, j);
7263 goto check_cond;
7264 }
7265 }
7266 }
7267 if (unlikely(!(F_SKIP_UA & flags) &&
7268 find_first_bit(devip->uas_bm,
7269 SDEBUG_NUM_UAS) != SDEBUG_NUM_UAS)) {
7270 errsts = make_ua(scp, devip);
7271 if (errsts)
7272 goto check_cond;
7273 }
7274 if (unlikely(((F_M_ACCESS & flags) || scp->cmnd[0] == TEST_UNIT_READY) &&
7275 atomic_read(&devip->stopped))) {
7276 errsts = resp_not_ready(scp, devip);
7277 if (errsts)
7278 goto fini;
7279 }
7280 if (sdebug_fake_rw && (F_FAKE_RW & flags))
7281 goto fini;
7282 if (unlikely(sdebug_every_nth)) {
7283 if (fake_timeout(scp))
7284 return 0; /* ignore command: make trouble */
7285 }
7286 if (likely(oip->pfp))
7287 pfp = oip->pfp; /* calls a resp_* function */
7288 else
7289 pfp = r_pfp; /* if leaf function ptr NULL, try the root's */
7290
7291 fini:
7292 if (F_DELAY_OVERR & flags) /* cmds like INQUIRY respond asap */
7293 return schedule_resp(scp, devip, errsts, pfp, 0, 0);
7294 else if ((flags & F_LONG_DELAY) && (sdebug_jdelay > 0 ||
7295 sdebug_ndelay > 10000)) {
7296 /*
7297 * Skip long delays if ndelay <= 10 microseconds. Otherwise
7298 * for Start Stop Unit (SSU) want at least 1 second delay and
7299 * if sdebug_jdelay>1 want a long delay of that many seconds.
7300 * For Synchronize Cache want 1/20 of SSU's delay.
7301 */
7302 int jdelay = (sdebug_jdelay < 2) ? 1 : sdebug_jdelay;
7303 int denom = (flags & F_SYNC_DELAY) ? 20 : 1;
7304
7305 jdelay = mult_frac(USER_HZ * jdelay, HZ, denom * USER_HZ);
7306 return schedule_resp(scp, devip, errsts, pfp, jdelay, 0);
7307 } else
7308 return schedule_resp(scp, devip, errsts, pfp, sdebug_jdelay,
7309 sdebug_ndelay);
7310 check_cond:
7311 return schedule_resp(scp, devip, check_condition_result, NULL, 0, 0);
7312 err_out:
7313 return schedule_resp(scp, NULL, DID_NO_CONNECT << 16, NULL, 0, 0);
7314 }
7315
7316 static struct scsi_host_template sdebug_driver_template = {
7317 .show_info = scsi_debug_show_info,
7318 .write_info = scsi_debug_write_info,
7319 .proc_name = sdebug_proc_name,
7320 .name = "SCSI DEBUG",
7321 .info = scsi_debug_info,
7322 .slave_alloc = scsi_debug_slave_alloc,
7323 .slave_configure = scsi_debug_slave_configure,
7324 .slave_destroy = scsi_debug_slave_destroy,
7325 .ioctl = scsi_debug_ioctl,
7326 .queuecommand = scsi_debug_queuecommand,
7327 .change_queue_depth = sdebug_change_qdepth,
7328 .eh_abort_handler = scsi_debug_abort,
7329 .eh_device_reset_handler = scsi_debug_device_reset,
7330 .eh_target_reset_handler = scsi_debug_target_reset,
7331 .eh_bus_reset_handler = scsi_debug_bus_reset,
7332 .eh_host_reset_handler = scsi_debug_host_reset,
7333 .can_queue = SDEBUG_CANQUEUE,
7334 .this_id = 7,
7335 .sg_tablesize = SG_MAX_SEGMENTS,
7336 .cmd_per_lun = DEF_CMD_PER_LUN,
7337 .max_sectors = -1U,
7338 .max_segment_size = -1U,
7339 .module = THIS_MODULE,
7340 .track_queue_depth = 1,
7341 };
7342
7343 static int sdebug_driver_probe(struct device *dev)
7344 {
7345 int error = 0;
7346 struct sdebug_host_info *sdbg_host;
7347 struct Scsi_Host *hpnt;
7348 int hprot;
7349
7350 sdbg_host = to_sdebug_host(dev);
7351
7352 if (sdebug_host_max_queue)
7353 sdebug_driver_template.can_queue = sdebug_host_max_queue;
7354 else
7355 sdebug_driver_template.can_queue = sdebug_max_queue;
7356 if (!sdebug_clustering)
7357 sdebug_driver_template.dma_boundary = PAGE_SIZE - 1;
7358
7359 hpnt = scsi_host_alloc(&sdebug_driver_template, sizeof(sdbg_host));
7360 if (NULL == hpnt) {
7361 pr_err("scsi_host_alloc failed\n");
7362 error = -ENODEV;
7363 return error;
7364 }
7365 if (submit_queues > nr_cpu_ids) {
7366 pr_warn("%s: trim submit_queues (was %d) to nr_cpu_ids=%u\n",
7367 my_name, submit_queues, nr_cpu_ids);
7368 submit_queues = nr_cpu_ids;
7369 }
7370 /*
7371 * Decide whether to tell scsi subsystem that we want mq. The
7372 * following should give the same answer for each host. If the host
7373 * has a limit of hostwide max commands, then do not set.
7374 */
7375 if (!sdebug_host_max_queue)
7376 hpnt->nr_hw_queues = submit_queues;
7377
7378 sdbg_host->shost = hpnt;
7379 *((struct sdebug_host_info **)hpnt->hostdata) = sdbg_host;
7380 if ((hpnt->this_id >= 0) && (sdebug_num_tgts > hpnt->this_id))
7381 hpnt->max_id = sdebug_num_tgts + 1;
7382 else
7383 hpnt->max_id = sdebug_num_tgts;
7384 /* = sdebug_max_luns; */
7385 hpnt->max_lun = SCSI_W_LUN_REPORT_LUNS + 1;
7386
7387 hprot = 0;
7388
7389 switch (sdebug_dif) {
7390
7391 case T10_PI_TYPE1_PROTECTION:
7392 hprot = SHOST_DIF_TYPE1_PROTECTION;
7393 if (sdebug_dix)
7394 hprot |= SHOST_DIX_TYPE1_PROTECTION;
7395 break;
7396
7397 case T10_PI_TYPE2_PROTECTION:
7398 hprot = SHOST_DIF_TYPE2_PROTECTION;
7399 if (sdebug_dix)
7400 hprot |= SHOST_DIX_TYPE2_PROTECTION;
7401 break;
7402
7403 case T10_PI_TYPE3_PROTECTION:
7404 hprot = SHOST_DIF_TYPE3_PROTECTION;
7405 if (sdebug_dix)
7406 hprot |= SHOST_DIX_TYPE3_PROTECTION;
7407 break;
7408
7409 default:
7410 if (sdebug_dix)
7411 hprot |= SHOST_DIX_TYPE0_PROTECTION;
7412 break;
7413 }
7414
7415 scsi_host_set_prot(hpnt, hprot);
7416
7417 if (have_dif_prot || sdebug_dix)
7418 pr_info("host protection%s%s%s%s%s%s%s\n",
7419 (hprot & SHOST_DIF_TYPE1_PROTECTION) ? " DIF1" : "",
7420 (hprot & SHOST_DIF_TYPE2_PROTECTION) ? " DIF2" : "",
7421 (hprot & SHOST_DIF_TYPE3_PROTECTION) ? " DIF3" : "",
7422 (hprot & SHOST_DIX_TYPE0_PROTECTION) ? " DIX0" : "",
7423 (hprot & SHOST_DIX_TYPE1_PROTECTION) ? " DIX1" : "",
7424 (hprot & SHOST_DIX_TYPE2_PROTECTION) ? " DIX2" : "",
7425 (hprot & SHOST_DIX_TYPE3_PROTECTION) ? " DIX3" : "");
7426
7427 if (sdebug_guard == 1)
7428 scsi_host_set_guard(hpnt, SHOST_DIX_GUARD_IP);
7429 else
7430 scsi_host_set_guard(hpnt, SHOST_DIX_GUARD_CRC);
7431
7432 sdebug_verbose = !!(SDEBUG_OPT_NOISE & sdebug_opts);
7433 sdebug_any_injecting_opt = !!(SDEBUG_OPT_ALL_INJECTING & sdebug_opts);
7434 if (sdebug_every_nth) /* need stats counters for every_nth */
7435 sdebug_statistics = true;
7436 error = scsi_add_host(hpnt, &sdbg_host->dev);
7437 if (error) {
7438 pr_err("scsi_add_host failed\n");
7439 error = -ENODEV;
7440 scsi_host_put(hpnt);
7441 } else {
7442 scsi_scan_host(hpnt);
7443 }
7444
7445 return error;
7446 }
7447
7448 static int sdebug_driver_remove(struct device *dev)
7449 {
7450 struct sdebug_host_info *sdbg_host;
7451 struct sdebug_dev_info *sdbg_devinfo, *tmp;
7452
7453 sdbg_host = to_sdebug_host(dev);
7454
7455 if (!sdbg_host) {
7456 pr_err("Unable to locate host info\n");
7457 return -ENODEV;
7458 }
7459
7460 scsi_remove_host(sdbg_host->shost);
7461
7462 list_for_each_entry_safe(sdbg_devinfo, tmp, &sdbg_host->dev_info_list,
7463 dev_list) {
7464 list_del(&sdbg_devinfo->dev_list);
7465 kfree(sdbg_devinfo->zstate);
7466 kfree(sdbg_devinfo);
7467 }
7468
7469 scsi_host_put(sdbg_host->shost);
7470 return 0;
7471 }
7472
7473 static int pseudo_lld_bus_match(struct device *dev,
7474 struct device_driver *dev_driver)
7475 {
7476 return 1;
7477 }
7478
7479 static struct bus_type pseudo_lld_bus = {
7480 .name = "pseudo",
7481 .match = pseudo_lld_bus_match,
7482 .probe = sdebug_driver_probe,
7483 .remove = sdebug_driver_remove,
7484 .drv_groups = sdebug_drv_groups,
7485 };
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