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 - 2021 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 #include <linux/align.h> 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/fs.h> 27 #include <linux/init.h> 28 #include <linux/proc_fs.h> 29 #include <linux/vmalloc.h> 30 #include <linux/moduleparam.h> 31 #include <linux/scatterlist.h> 32 #include <linux/blkdev.h> 33 #include <linux/crc-t10dif.h> 34 #include <linux/spinlock.h> 35 #include <linux/interrupt.h> 36 #include <linux/atomic.h> 37 #include <linux/hrtimer.h> 38 #include <linux/uuid.h> 39 #include <linux/t10-pi.h> 40 #include <linux/msdos_partition.h> 41 #include <linux/random.h> 42 #include <linux/xarray.h> 43 #include <linux/prefetch.h> 44 #include <linux/debugfs.h> 45 #include <linux/async.h> 46 #include <linux/cleanup.h> 47 48 #include <net/checksum.h> 49 50 #include <asm/unaligned.h> 51 52 #include <scsi/scsi.h> 53 #include <scsi/scsi_cmnd.h> 54 #include <scsi/scsi_device.h> 55 #include <scsi/scsi_host.h> 56 #include <scsi/scsicam.h> 57 #include <scsi/scsi_eh.h> 58 #include <scsi/scsi_tcq.h> 59 #include <scsi/scsi_dbg.h> 60 61 #include "sd.h" 62 #include "scsi_logging.h" 63 64 /* make sure inq_product_rev string corresponds to this version */ 65 #define SDEBUG_VERSION "0191" /* format to fit INQUIRY revision field */ 66 static const char *sdebug_version_date = "20210520"; 67 68 #define MY_NAME "scsi_debug" 69 70 /* Additional Sense Code (ASC) */ 71 #define NO_ADDITIONAL_SENSE 0x0 72 #define LOGICAL_UNIT_NOT_READY 0x4 73 #define LOGICAL_UNIT_COMMUNICATION_FAILURE 0x8 74 #define UNRECOVERED_READ_ERR 0x11 75 #define PARAMETER_LIST_LENGTH_ERR 0x1a 76 #define INVALID_OPCODE 0x20 77 #define LBA_OUT_OF_RANGE 0x21 78 #define INVALID_FIELD_IN_CDB 0x24 79 #define INVALID_FIELD_IN_PARAM_LIST 0x26 80 #define WRITE_PROTECTED 0x27 81 #define UA_RESET_ASC 0x29 82 #define UA_CHANGED_ASC 0x2a 83 #define TARGET_CHANGED_ASC 0x3f 84 #define LUNS_CHANGED_ASCQ 0x0e 85 #define INSUFF_RES_ASC 0x55 86 #define INSUFF_RES_ASCQ 0x3 87 #define POWER_ON_RESET_ASCQ 0x0 88 #define POWER_ON_OCCURRED_ASCQ 0x1 89 #define BUS_RESET_ASCQ 0x2 /* scsi bus reset occurred */ 90 #define MODE_CHANGED_ASCQ 0x1 /* mode parameters changed */ 91 #define CAPACITY_CHANGED_ASCQ 0x9 92 #define SAVING_PARAMS_UNSUP 0x39 93 #define TRANSPORT_PROBLEM 0x4b 94 #define THRESHOLD_EXCEEDED 0x5d 95 #define LOW_POWER_COND_ON 0x5e 96 #define MISCOMPARE_VERIFY_ASC 0x1d 97 #define MICROCODE_CHANGED_ASCQ 0x1 /* with TARGET_CHANGED_ASC */ 98 #define MICROCODE_CHANGED_WO_RESET_ASCQ 0x16 99 #define WRITE_ERROR_ASC 0xc 100 #define UNALIGNED_WRITE_ASCQ 0x4 101 #define WRITE_BOUNDARY_ASCQ 0x5 102 #define READ_INVDATA_ASCQ 0x6 103 #define READ_BOUNDARY_ASCQ 0x7 104 #define ATTEMPT_ACCESS_GAP 0x9 105 #define INSUFF_ZONE_ASCQ 0xe 106 107 /* Additional Sense Code Qualifier (ASCQ) */ 108 #define ACK_NAK_TO 0x3 109 110 /* Default values for driver parameters */ 111 #define DEF_NUM_HOST 1 112 #define DEF_NUM_TGTS 1 113 #define DEF_MAX_LUNS 1 114 /* With these defaults, this driver will make 1 host with 1 target 115 * (id 0) containing 1 logical unit (lun 0). That is 1 device. 116 */ 117 #define DEF_ATO 1 118 #define DEF_CDB_LEN 10 119 #define DEF_JDELAY 1 /* if > 0 unit is a jiffy */ 120 #define DEF_DEV_SIZE_PRE_INIT 0 121 #define DEF_DEV_SIZE_MB 8 122 #define DEF_ZBC_DEV_SIZE_MB 128 123 #define DEF_DIF 0 124 #define DEF_DIX 0 125 #define DEF_PER_HOST_STORE false 126 #define DEF_D_SENSE 0 127 #define DEF_EVERY_NTH 0 128 #define DEF_FAKE_RW 0 129 #define DEF_GUARD 0 130 #define DEF_HOST_LOCK 0 131 #define DEF_LBPU 0 132 #define DEF_LBPWS 0 133 #define DEF_LBPWS10 0 134 #define DEF_LBPRZ 1 135 #define DEF_LOWEST_ALIGNED 0 136 #define DEF_NDELAY 0 /* if > 0 unit is a nanosecond */ 137 #define DEF_NO_LUN_0 0 138 #define DEF_NUM_PARTS 0 139 #define DEF_OPTS 0 140 #define DEF_OPT_BLKS 1024 141 #define DEF_PHYSBLK_EXP 0 142 #define DEF_OPT_XFERLEN_EXP 0 143 #define DEF_PTYPE TYPE_DISK 144 #define DEF_RANDOM false 145 #define DEF_REMOVABLE false 146 #define DEF_SCSI_LEVEL 7 /* INQUIRY, byte2 [6->SPC-4; 7->SPC-5] */ 147 #define DEF_SECTOR_SIZE 512 148 #define DEF_UNMAP_ALIGNMENT 0 149 #define DEF_UNMAP_GRANULARITY 1 150 #define DEF_UNMAP_MAX_BLOCKS 0xFFFFFFFF 151 #define DEF_UNMAP_MAX_DESC 256 152 #define DEF_VIRTUAL_GB 0 153 #define DEF_VPD_USE_HOSTNO 1 154 #define DEF_WRITESAME_LENGTH 0xFFFF 155 #define DEF_STRICT 0 156 #define DEF_STATISTICS false 157 #define DEF_SUBMIT_QUEUES 1 158 #define DEF_TUR_MS_TO_READY 0 159 #define DEF_UUID_CTL 0 160 #define JDELAY_OVERRIDDEN -9999 161 162 /* Default parameters for ZBC drives */ 163 #define DEF_ZBC_ZONE_SIZE_MB 128 164 #define DEF_ZBC_MAX_OPEN_ZONES 8 165 #define DEF_ZBC_NR_CONV_ZONES 1 166 167 #define SDEBUG_LUN_0_VAL 0 168 169 /* bit mask values for sdebug_opts */ 170 #define SDEBUG_OPT_NOISE 1 171 #define SDEBUG_OPT_MEDIUM_ERR 2 172 #define SDEBUG_OPT_TIMEOUT 4 173 #define SDEBUG_OPT_RECOVERED_ERR 8 174 #define SDEBUG_OPT_TRANSPORT_ERR 16 175 #define SDEBUG_OPT_DIF_ERR 32 176 #define SDEBUG_OPT_DIX_ERR 64 177 #define SDEBUG_OPT_MAC_TIMEOUT 128 178 #define SDEBUG_OPT_SHORT_TRANSFER 0x100 179 #define SDEBUG_OPT_Q_NOISE 0x200 180 #define SDEBUG_OPT_ALL_TSF 0x400 /* ignore */ 181 #define SDEBUG_OPT_RARE_TSF 0x800 182 #define SDEBUG_OPT_N_WCE 0x1000 183 #define SDEBUG_OPT_RESET_NOISE 0x2000 184 #define SDEBUG_OPT_NO_CDB_NOISE 0x4000 185 #define SDEBUG_OPT_HOST_BUSY 0x8000 186 #define SDEBUG_OPT_CMD_ABORT 0x10000 187 #define SDEBUG_OPT_ALL_NOISE (SDEBUG_OPT_NOISE | SDEBUG_OPT_Q_NOISE | \ 188 SDEBUG_OPT_RESET_NOISE) 189 #define SDEBUG_OPT_ALL_INJECTING (SDEBUG_OPT_RECOVERED_ERR | \ 190 SDEBUG_OPT_TRANSPORT_ERR | \ 191 SDEBUG_OPT_DIF_ERR | SDEBUG_OPT_DIX_ERR | \ 192 SDEBUG_OPT_SHORT_TRANSFER | \ 193 SDEBUG_OPT_HOST_BUSY | \ 194 SDEBUG_OPT_CMD_ABORT) 195 #define SDEBUG_OPT_RECOV_DIF_DIX (SDEBUG_OPT_RECOVERED_ERR | \ 196 SDEBUG_OPT_DIF_ERR | SDEBUG_OPT_DIX_ERR) 197 198 /* As indicated in SAM-5 and SPC-4 Unit Attentions (UAs) are returned in 199 * priority order. In the subset implemented here lower numbers have higher 200 * priority. The UA numbers should be a sequence starting from 0 with 201 * SDEBUG_NUM_UAS being 1 higher than the highest numbered UA. */ 202 #define SDEBUG_UA_POR 0 /* Power on, reset, or bus device reset */ 203 #define SDEBUG_UA_POOCCUR 1 /* Power on occurred */ 204 #define SDEBUG_UA_BUS_RESET 2 205 #define SDEBUG_UA_MODE_CHANGED 3 206 #define SDEBUG_UA_CAPACITY_CHANGED 4 207 #define SDEBUG_UA_LUNS_CHANGED 5 208 #define SDEBUG_UA_MICROCODE_CHANGED 6 /* simulate firmware change */ 209 #define SDEBUG_UA_MICROCODE_CHANGED_WO_RESET 7 210 #define SDEBUG_NUM_UAS 8 211 212 /* when 1==SDEBUG_OPT_MEDIUM_ERR, a medium error is simulated at this 213 * sector on read commands: */ 214 #define OPT_MEDIUM_ERR_ADDR 0x1234 /* that's sector 4660 in decimal */ 215 #define OPT_MEDIUM_ERR_NUM 10 /* number of consecutive medium errs */ 216 217 /* SDEBUG_CANQUEUE is the maximum number of commands that can be queued 218 * (for response) per submit queue at one time. Can be reduced by max_queue 219 * option. Command responses are not queued when jdelay=0 and ndelay=0. The 220 * per-device DEF_CMD_PER_LUN can be changed via sysfs: 221 * /sys/class/scsi_device/<h:c:t:l>/device/queue_depth 222 * but cannot exceed SDEBUG_CANQUEUE . 223 */ 224 #define SDEBUG_CANQUEUE_WORDS 3 /* a WORD is bits in a long */ 225 #define SDEBUG_CANQUEUE (SDEBUG_CANQUEUE_WORDS * BITS_PER_LONG) 226 #define DEF_CMD_PER_LUN SDEBUG_CANQUEUE 227 228 /* UA - Unit Attention; SA - Service Action; SSU - Start Stop Unit */ 229 #define F_D_IN 1 /* Data-in command (e.g. READ) */ 230 #define F_D_OUT 2 /* Data-out command (e.g. WRITE) */ 231 #define F_D_OUT_MAYBE 4 /* WRITE SAME, NDOB bit */ 232 #define F_D_UNKN 8 233 #define F_RL_WLUN_OK 0x10 /* allowed with REPORT LUNS W-LUN */ 234 #define F_SKIP_UA 0x20 /* bypass UAs (e.g. INQUIRY command) */ 235 #define F_DELAY_OVERR 0x40 /* for commands like INQUIRY */ 236 #define F_SA_LOW 0x80 /* SA is in cdb byte 1, bits 4 to 0 */ 237 #define F_SA_HIGH 0x100 /* SA is in cdb bytes 8 and 9 */ 238 #define F_INV_OP 0x200 /* invalid opcode (not supported) */ 239 #define F_FAKE_RW 0x400 /* bypass resp_*() when fake_rw set */ 240 #define F_M_ACCESS 0x800 /* media access, reacts to SSU state */ 241 #define F_SSU_DELAY 0x1000 /* SSU command delay (long-ish) */ 242 #define F_SYNC_DELAY 0x2000 /* SYNCHRONIZE CACHE delay */ 243 244 /* Useful combinations of the above flags */ 245 #define FF_RESPOND (F_RL_WLUN_OK | F_SKIP_UA | F_DELAY_OVERR) 246 #define FF_MEDIA_IO (F_M_ACCESS | F_FAKE_RW) 247 #define FF_SA (F_SA_HIGH | F_SA_LOW) 248 #define F_LONG_DELAY (F_SSU_DELAY | F_SYNC_DELAY) 249 250 #define SDEBUG_MAX_PARTS 4 251 252 #define SDEBUG_MAX_CMD_LEN 32 253 254 #define SDEB_XA_NOT_IN_USE XA_MARK_1 255 256 static struct kmem_cache *queued_cmd_cache; 257 258 #define TO_QUEUED_CMD(scmd) ((void *)(scmd)->host_scribble) 259 #define ASSIGN_QUEUED_CMD(scmnd, qc) { (scmnd)->host_scribble = (void *) qc; } 260 261 /* Zone types (zbcr05 table 25) */ 262 enum sdebug_z_type { 263 ZBC_ZTYPE_CNV = 0x1, 264 ZBC_ZTYPE_SWR = 0x2, 265 ZBC_ZTYPE_SWP = 0x3, 266 /* ZBC_ZTYPE_SOBR = 0x4, */ 267 ZBC_ZTYPE_GAP = 0x5, 268 }; 269 270 /* enumeration names taken from table 26, zbcr05 */ 271 enum sdebug_z_cond { 272 ZBC_NOT_WRITE_POINTER = 0x0, 273 ZC1_EMPTY = 0x1, 274 ZC2_IMPLICIT_OPEN = 0x2, 275 ZC3_EXPLICIT_OPEN = 0x3, 276 ZC4_CLOSED = 0x4, 277 ZC6_READ_ONLY = 0xd, 278 ZC5_FULL = 0xe, 279 ZC7_OFFLINE = 0xf, 280 }; 281 282 struct sdeb_zone_state { /* ZBC: per zone state */ 283 enum sdebug_z_type z_type; 284 enum sdebug_z_cond z_cond; 285 bool z_non_seq_resource; 286 unsigned int z_size; 287 sector_t z_start; 288 sector_t z_wp; 289 }; 290 291 enum sdebug_err_type { 292 ERR_TMOUT_CMD = 0, /* make specific scsi command timeout */ 293 ERR_FAIL_QUEUE_CMD = 1, /* make specific scsi command's */ 294 /* queuecmd return failed */ 295 ERR_FAIL_CMD = 2, /* make specific scsi command's */ 296 /* queuecmd return succeed but */ 297 /* with errors set in scsi_cmnd */ 298 ERR_ABORT_CMD_FAILED = 3, /* control return FAILED from */ 299 /* scsi_debug_abort() */ 300 ERR_LUN_RESET_FAILED = 4, /* control return FAILED from */ 301 /* scsi_debug_device_reseLUN_RESET_FAILEDt() */ 302 }; 303 304 struct sdebug_err_inject { 305 int type; 306 struct list_head list; 307 int cnt; 308 unsigned char cmd; 309 struct rcu_head rcu; 310 311 union { 312 /* 313 * For ERR_FAIL_QUEUE_CMD 314 */ 315 int queuecmd_ret; 316 317 /* 318 * For ERR_FAIL_CMD 319 */ 320 struct { 321 unsigned char host_byte; 322 unsigned char driver_byte; 323 unsigned char status_byte; 324 unsigned char sense_key; 325 unsigned char asc; 326 unsigned char asq; 327 }; 328 }; 329 }; 330 331 struct sdebug_dev_info { 332 struct list_head dev_list; 333 unsigned int channel; 334 unsigned int target; 335 u64 lun; 336 uuid_t lu_name; 337 struct sdebug_host_info *sdbg_host; 338 unsigned long uas_bm[1]; 339 atomic_t stopped; /* 1: by SSU, 2: device start */ 340 bool used; 341 342 /* For ZBC devices */ 343 bool zoned; 344 unsigned int zcap; 345 unsigned int zsize; 346 unsigned int zsize_shift; 347 unsigned int nr_zones; 348 unsigned int nr_conv_zones; 349 unsigned int nr_seq_zones; 350 unsigned int nr_imp_open; 351 unsigned int nr_exp_open; 352 unsigned int nr_closed; 353 unsigned int max_open; 354 ktime_t create_ts; /* time since bootup that this device was created */ 355 struct sdeb_zone_state *zstate; 356 357 struct dentry *debugfs_entry; 358 struct spinlock list_lock; 359 struct list_head inject_err_list; 360 }; 361 362 struct sdebug_target_info { 363 bool reset_fail; 364 struct dentry *debugfs_entry; 365 }; 366 367 struct sdebug_host_info { 368 struct list_head host_list; 369 int si_idx; /* sdeb_store_info (per host) xarray index */ 370 struct Scsi_Host *shost; 371 struct device dev; 372 struct list_head dev_info_list; 373 }; 374 375 /* There is an xarray of pointers to this struct's objects, one per host */ 376 struct sdeb_store_info { 377 rwlock_t macc_lck; /* for atomic media access on this store */ 378 u8 *storep; /* user data storage (ram) */ 379 struct t10_pi_tuple *dif_storep; /* protection info */ 380 void *map_storep; /* provisioning map */ 381 }; 382 383 #define dev_to_sdebug_host(d) \ 384 container_of(d, struct sdebug_host_info, dev) 385 386 #define shost_to_sdebug_host(shost) \ 387 dev_to_sdebug_host(shost->dma_dev) 388 389 enum sdeb_defer_type {SDEB_DEFER_NONE = 0, SDEB_DEFER_HRT = 1, 390 SDEB_DEFER_WQ = 2, SDEB_DEFER_POLL = 3}; 391 392 struct sdebug_defer { 393 struct hrtimer hrt; 394 struct execute_work ew; 395 ktime_t cmpl_ts;/* time since boot to complete this cmd */ 396 int issuing_cpu; 397 bool aborted; /* true when blk_abort_request() already called */ 398 enum sdeb_defer_type defer_t; 399 }; 400 401 struct sdebug_queued_cmd { 402 /* corresponding bit set in in_use_bm[] in owning struct sdebug_queue 403 * instance indicates this slot is in use. 404 */ 405 struct sdebug_defer sd_dp; 406 struct scsi_cmnd *scmd; 407 }; 408 409 struct sdebug_scsi_cmd { 410 spinlock_t lock; 411 }; 412 413 static atomic_t sdebug_cmnd_count; /* number of incoming commands */ 414 static atomic_t sdebug_completions; /* count of deferred completions */ 415 static atomic_t sdebug_miss_cpus; /* submission + completion cpus differ */ 416 static atomic_t sdebug_a_tsf; /* 'almost task set full' counter */ 417 static atomic_t sdeb_inject_pending; 418 static atomic_t sdeb_mq_poll_count; /* bumped when mq_poll returns > 0 */ 419 420 struct opcode_info_t { 421 u8 num_attached; /* 0 if this is it (i.e. a leaf); use 0xff */ 422 /* for terminating element */ 423 u8 opcode; /* if num_attached > 0, preferred */ 424 u16 sa; /* service action */ 425 u32 flags; /* OR-ed set of SDEB_F_* */ 426 int (*pfp)(struct scsi_cmnd *, struct sdebug_dev_info *); 427 const struct opcode_info_t *arrp; /* num_attached elements or NULL */ 428 u8 len_mask[16]; /* len_mask[0]-->cdb_len, then mask for cdb */ 429 /* 1 to min(cdb_len, 15); ignore cdb[15...] */ 430 }; 431 432 /* SCSI opcodes (first byte of cdb) of interest mapped onto these indexes */ 433 enum sdeb_opcode_index { 434 SDEB_I_INVALID_OPCODE = 0, 435 SDEB_I_INQUIRY = 1, 436 SDEB_I_REPORT_LUNS = 2, 437 SDEB_I_REQUEST_SENSE = 3, 438 SDEB_I_TEST_UNIT_READY = 4, 439 SDEB_I_MODE_SENSE = 5, /* 6, 10 */ 440 SDEB_I_MODE_SELECT = 6, /* 6, 10 */ 441 SDEB_I_LOG_SENSE = 7, 442 SDEB_I_READ_CAPACITY = 8, /* 10; 16 is in SA_IN(16) */ 443 SDEB_I_READ = 9, /* 6, 10, 12, 16 */ 444 SDEB_I_WRITE = 10, /* 6, 10, 12, 16 */ 445 SDEB_I_START_STOP = 11, 446 SDEB_I_SERV_ACT_IN_16 = 12, /* add ...SERV_ACT_IN_12 if needed */ 447 SDEB_I_SERV_ACT_OUT_16 = 13, /* add ...SERV_ACT_OUT_12 if needed */ 448 SDEB_I_MAINT_IN = 14, 449 SDEB_I_MAINT_OUT = 15, 450 SDEB_I_VERIFY = 16, /* VERIFY(10), VERIFY(16) */ 451 SDEB_I_VARIABLE_LEN = 17, /* READ(32), WRITE(32), WR_SCAT(32) */ 452 SDEB_I_RESERVE = 18, /* 6, 10 */ 453 SDEB_I_RELEASE = 19, /* 6, 10 */ 454 SDEB_I_ALLOW_REMOVAL = 20, /* PREVENT ALLOW MEDIUM REMOVAL */ 455 SDEB_I_REZERO_UNIT = 21, /* REWIND in SSC */ 456 SDEB_I_ATA_PT = 22, /* 12, 16 */ 457 SDEB_I_SEND_DIAG = 23, 458 SDEB_I_UNMAP = 24, 459 SDEB_I_WRITE_BUFFER = 25, 460 SDEB_I_WRITE_SAME = 26, /* 10, 16 */ 461 SDEB_I_SYNC_CACHE = 27, /* 10, 16 */ 462 SDEB_I_COMP_WRITE = 28, 463 SDEB_I_PRE_FETCH = 29, /* 10, 16 */ 464 SDEB_I_ZONE_OUT = 30, /* 0x94+SA; includes no data xfer */ 465 SDEB_I_ZONE_IN = 31, /* 0x95+SA; all have data-in */ 466 SDEB_I_LAST_ELEM_P1 = 32, /* keep this last (previous + 1) */ 467 }; 468 469 470 static const unsigned char opcode_ind_arr[256] = { 471 /* 0x0; 0x0->0x1f: 6 byte cdbs */ 472 SDEB_I_TEST_UNIT_READY, SDEB_I_REZERO_UNIT, 0, SDEB_I_REQUEST_SENSE, 473 0, 0, 0, 0, 474 SDEB_I_READ, 0, SDEB_I_WRITE, 0, 0, 0, 0, 0, 475 0, 0, SDEB_I_INQUIRY, 0, 0, SDEB_I_MODE_SELECT, SDEB_I_RESERVE, 476 SDEB_I_RELEASE, 477 0, 0, SDEB_I_MODE_SENSE, SDEB_I_START_STOP, 0, SDEB_I_SEND_DIAG, 478 SDEB_I_ALLOW_REMOVAL, 0, 479 /* 0x20; 0x20->0x3f: 10 byte cdbs */ 480 0, 0, 0, 0, 0, SDEB_I_READ_CAPACITY, 0, 0, 481 SDEB_I_READ, 0, SDEB_I_WRITE, 0, 0, 0, 0, SDEB_I_VERIFY, 482 0, 0, 0, 0, SDEB_I_PRE_FETCH, SDEB_I_SYNC_CACHE, 0, 0, 483 0, 0, 0, SDEB_I_WRITE_BUFFER, 0, 0, 0, 0, 484 /* 0x40; 0x40->0x5f: 10 byte cdbs */ 485 0, SDEB_I_WRITE_SAME, SDEB_I_UNMAP, 0, 0, 0, 0, 0, 486 0, 0, 0, 0, 0, SDEB_I_LOG_SENSE, 0, 0, 487 0, 0, 0, 0, 0, SDEB_I_MODE_SELECT, SDEB_I_RESERVE, 488 SDEB_I_RELEASE, 489 0, 0, SDEB_I_MODE_SENSE, 0, 0, 0, 0, 0, 490 /* 0x60; 0x60->0x7d are reserved, 0x7e is "extended cdb" */ 491 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 492 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 493 0, SDEB_I_VARIABLE_LEN, 494 /* 0x80; 0x80->0x9f: 16 byte cdbs */ 495 0, 0, 0, 0, 0, SDEB_I_ATA_PT, 0, 0, 496 SDEB_I_READ, SDEB_I_COMP_WRITE, SDEB_I_WRITE, 0, 497 0, 0, 0, SDEB_I_VERIFY, 498 SDEB_I_PRE_FETCH, SDEB_I_SYNC_CACHE, 0, SDEB_I_WRITE_SAME, 499 SDEB_I_ZONE_OUT, SDEB_I_ZONE_IN, 0, 0, 500 0, 0, 0, 0, 0, 0, SDEB_I_SERV_ACT_IN_16, SDEB_I_SERV_ACT_OUT_16, 501 /* 0xa0; 0xa0->0xbf: 12 byte cdbs */ 502 SDEB_I_REPORT_LUNS, SDEB_I_ATA_PT, 0, SDEB_I_MAINT_IN, 503 SDEB_I_MAINT_OUT, 0, 0, 0, 504 SDEB_I_READ, 0 /* SDEB_I_SERV_ACT_OUT_12 */, SDEB_I_WRITE, 505 0 /* SDEB_I_SERV_ACT_IN_12 */, 0, 0, 0, 0, 506 0, 0, 0, 0, 0, 0, 0, 0, 507 0, 0, 0, 0, 0, 0, 0, 0, 508 /* 0xc0; 0xc0->0xff: vendor specific */ 509 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 510 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 511 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 512 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 513 }; 514 515 /* 516 * The following "response" functions return the SCSI mid-level's 4 byte 517 * tuple-in-an-int. To handle commands with an IMMED bit, for a faster 518 * command completion, they can mask their return value with 519 * SDEG_RES_IMMED_MASK . 520 */ 521 #define SDEG_RES_IMMED_MASK 0x40000000 522 523 static int resp_inquiry(struct scsi_cmnd *, struct sdebug_dev_info *); 524 static int resp_report_luns(struct scsi_cmnd *, struct sdebug_dev_info *); 525 static int resp_requests(struct scsi_cmnd *, struct sdebug_dev_info *); 526 static int resp_mode_sense(struct scsi_cmnd *, struct sdebug_dev_info *); 527 static int resp_mode_select(struct scsi_cmnd *, struct sdebug_dev_info *); 528 static int resp_log_sense(struct scsi_cmnd *, struct sdebug_dev_info *); 529 static int resp_readcap(struct scsi_cmnd *, struct sdebug_dev_info *); 530 static int resp_read_dt0(struct scsi_cmnd *, struct sdebug_dev_info *); 531 static int resp_write_dt0(struct scsi_cmnd *, struct sdebug_dev_info *); 532 static int resp_write_scat(struct scsi_cmnd *, struct sdebug_dev_info *); 533 static int resp_start_stop(struct scsi_cmnd *, struct sdebug_dev_info *); 534 static int resp_readcap16(struct scsi_cmnd *, struct sdebug_dev_info *); 535 static int resp_get_lba_status(struct scsi_cmnd *, struct sdebug_dev_info *); 536 static int resp_get_stream_status(struct scsi_cmnd *scp, 537 struct sdebug_dev_info *devip); 538 static int resp_report_tgtpgs(struct scsi_cmnd *, struct sdebug_dev_info *); 539 static int resp_unmap(struct scsi_cmnd *, struct sdebug_dev_info *); 540 static int resp_rsup_opcodes(struct scsi_cmnd *, struct sdebug_dev_info *); 541 static int resp_rsup_tmfs(struct scsi_cmnd *, struct sdebug_dev_info *); 542 static int resp_verify(struct scsi_cmnd *, struct sdebug_dev_info *); 543 static int resp_write_same_10(struct scsi_cmnd *, struct sdebug_dev_info *); 544 static int resp_write_same_16(struct scsi_cmnd *, struct sdebug_dev_info *); 545 static int resp_comp_write(struct scsi_cmnd *, struct sdebug_dev_info *); 546 static int resp_write_buffer(struct scsi_cmnd *, struct sdebug_dev_info *); 547 static int resp_sync_cache(struct scsi_cmnd *, struct sdebug_dev_info *); 548 static int resp_pre_fetch(struct scsi_cmnd *, struct sdebug_dev_info *); 549 static int resp_report_zones(struct scsi_cmnd *, struct sdebug_dev_info *); 550 static int resp_open_zone(struct scsi_cmnd *, struct sdebug_dev_info *); 551 static int resp_close_zone(struct scsi_cmnd *, struct sdebug_dev_info *); 552 static int resp_finish_zone(struct scsi_cmnd *, struct sdebug_dev_info *); 553 static int resp_rwp_zone(struct scsi_cmnd *, struct sdebug_dev_info *); 554 555 static int sdebug_do_add_host(bool mk_new_store); 556 static int sdebug_add_host_helper(int per_host_idx); 557 static void sdebug_do_remove_host(bool the_end); 558 static int sdebug_add_store(void); 559 static void sdebug_erase_store(int idx, struct sdeb_store_info *sip); 560 static void sdebug_erase_all_stores(bool apart_from_first); 561 562 static void sdebug_free_queued_cmd(struct sdebug_queued_cmd *sqcp); 563 564 /* 565 * The following are overflow arrays for cdbs that "hit" the same index in 566 * the opcode_info_arr array. The most time sensitive (or commonly used) cdb 567 * should be placed in opcode_info_arr[], the others should be placed here. 568 */ 569 static const struct opcode_info_t msense_iarr[] = { 570 {0, 0x1a, 0, F_D_IN, NULL, NULL, 571 {6, 0xe8, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} }, 572 }; 573 574 static const struct opcode_info_t mselect_iarr[] = { 575 {0, 0x15, 0, F_D_OUT, NULL, NULL, 576 {6, 0xf1, 0, 0, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} }, 577 }; 578 579 static const struct opcode_info_t read_iarr[] = { 580 {0, 0x28, 0, F_D_IN | FF_MEDIA_IO, resp_read_dt0, NULL,/* READ(10) */ 581 {10, 0xff, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xff, 0xff, 0xc7, 0, 0, 582 0, 0, 0, 0} }, 583 {0, 0x8, 0, F_D_IN | FF_MEDIA_IO, resp_read_dt0, NULL, /* READ(6) */ 584 {6, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} }, 585 {0, 0xa8, 0, F_D_IN | FF_MEDIA_IO, resp_read_dt0, NULL,/* READ(12) */ 586 {12, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xbf, 587 0xc7, 0, 0, 0, 0} }, 588 }; 589 590 static const struct opcode_info_t write_iarr[] = { 591 {0, 0x2a, 0, F_D_OUT | FF_MEDIA_IO, resp_write_dt0, /* WRITE(10) */ 592 NULL, {10, 0xfb, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xff, 0xff, 0xc7, 593 0, 0, 0, 0, 0, 0} }, 594 {0, 0xa, 0, F_D_OUT | FF_MEDIA_IO, resp_write_dt0, /* WRITE(6) */ 595 NULL, {6, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 596 0, 0, 0} }, 597 {0, 0xaa, 0, F_D_OUT | FF_MEDIA_IO, resp_write_dt0, /* WRITE(12) */ 598 NULL, {12, 0xfb, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 599 0xbf, 0xc7, 0, 0, 0, 0} }, 600 }; 601 602 static const struct opcode_info_t verify_iarr[] = { 603 {0, 0x2f, 0, F_D_OUT_MAYBE | FF_MEDIA_IO, resp_verify,/* VERIFY(10) */ 604 NULL, {10, 0xf7, 0xff, 0xff, 0xff, 0xff, 0xbf, 0xff, 0xff, 0xc7, 605 0, 0, 0, 0, 0, 0} }, 606 }; 607 608 static const struct opcode_info_t sa_in_16_iarr[] = { 609 {0, 0x9e, 0x12, F_SA_LOW | F_D_IN, resp_get_lba_status, NULL, 610 {16, 0x12, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 611 0xff, 0xff, 0xff, 0, 0xc7} }, /* GET LBA STATUS(16) */ 612 {0, 0x9e, 0x16, F_SA_LOW | F_D_IN, resp_get_stream_status, NULL, 613 {16, 0x16, 0, 0, 0xff, 0xff, 0, 0, 0, 0, 0xff, 0xff, 0xff, 0xff, 614 0, 0} }, /* GET STREAM STATUS */ 615 }; 616 617 static const struct opcode_info_t vl_iarr[] = { /* VARIABLE LENGTH */ 618 {0, 0x7f, 0xb, F_SA_HIGH | F_D_OUT | FF_MEDIA_IO, resp_write_dt0, 619 NULL, {32, 0xc7, 0, 0, 0, 0, 0x3f, 0x18, 0x0, 0xb, 0xfa, 620 0, 0xff, 0xff, 0xff, 0xff} }, /* WRITE(32) */ 621 {0, 0x7f, 0x11, F_SA_HIGH | F_D_OUT | FF_MEDIA_IO, resp_write_scat, 622 NULL, {32, 0xc7, 0, 0, 0, 0, 0x3f, 0x18, 0x0, 0x11, 0xf8, 623 0, 0xff, 0xff, 0x0, 0x0} }, /* WRITE SCATTERED(32) */ 624 }; 625 626 static const struct opcode_info_t maint_in_iarr[] = { /* MAINT IN */ 627 {0, 0xa3, 0xc, F_SA_LOW | F_D_IN, resp_rsup_opcodes, NULL, 628 {12, 0xc, 0x87, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0, 629 0xc7, 0, 0, 0, 0} }, /* REPORT SUPPORTED OPERATION CODES */ 630 {0, 0xa3, 0xd, F_SA_LOW | F_D_IN, resp_rsup_tmfs, NULL, 631 {12, 0xd, 0x80, 0, 0, 0, 0xff, 0xff, 0xff, 0xff, 0, 0xc7, 0, 0, 632 0, 0} }, /* REPORTED SUPPORTED TASK MANAGEMENT FUNCTIONS */ 633 }; 634 635 static const struct opcode_info_t write_same_iarr[] = { 636 {0, 0x93, 0, F_D_OUT_MAYBE | FF_MEDIA_IO, resp_write_same_16, NULL, 637 {16, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 638 0xff, 0xff, 0xff, 0x3f, 0xc7} }, /* WRITE SAME(16) */ 639 }; 640 641 static const struct opcode_info_t reserve_iarr[] = { 642 {0, 0x16, 0, F_D_OUT, NULL, NULL, /* RESERVE(6) */ 643 {6, 0x1f, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} }, 644 }; 645 646 static const struct opcode_info_t release_iarr[] = { 647 {0, 0x17, 0, F_D_OUT, NULL, NULL, /* RELEASE(6) */ 648 {6, 0x1f, 0xff, 0, 0, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} }, 649 }; 650 651 static const struct opcode_info_t sync_cache_iarr[] = { 652 {0, 0x91, 0, F_SYNC_DELAY | F_M_ACCESS, resp_sync_cache, NULL, 653 {16, 0x6, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 654 0xff, 0xff, 0xff, 0xff, 0x3f, 0xc7} }, /* SYNC_CACHE (16) */ 655 }; 656 657 static const struct opcode_info_t pre_fetch_iarr[] = { 658 {0, 0x90, 0, F_SYNC_DELAY | FF_MEDIA_IO, resp_pre_fetch, NULL, 659 {16, 0x2, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 660 0xff, 0xff, 0xff, 0xff, 0x3f, 0xc7} }, /* PRE-FETCH (16) */ 661 }; 662 663 static const struct opcode_info_t zone_out_iarr[] = { /* ZONE OUT(16) */ 664 {0, 0x94, 0x1, F_SA_LOW | F_M_ACCESS, resp_close_zone, NULL, 665 {16, 0x1, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 666 0xff, 0, 0, 0xff, 0xff, 0x1, 0xc7} }, /* CLOSE ZONE */ 667 {0, 0x94, 0x2, F_SA_LOW | F_M_ACCESS, resp_finish_zone, NULL, 668 {16, 0x2, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 669 0xff, 0, 0, 0xff, 0xff, 0x1, 0xc7} }, /* FINISH ZONE */ 670 {0, 0x94, 0x4, F_SA_LOW | F_M_ACCESS, resp_rwp_zone, NULL, 671 {16, 0x4, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 672 0xff, 0, 0, 0xff, 0xff, 0x1, 0xc7} }, /* RESET WRITE POINTER */ 673 }; 674 675 static const struct opcode_info_t zone_in_iarr[] = { /* ZONE IN(16) */ 676 {0, 0x95, 0x6, F_SA_LOW | F_D_IN | F_M_ACCESS, NULL, NULL, 677 {16, 0x6, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 678 0xff, 0xff, 0xff, 0xff, 0x3f, 0xc7} }, /* REPORT ZONES */ 679 }; 680 681 682 /* This array is accessed via SDEB_I_* values. Make sure all are mapped, 683 * plus the terminating elements for logic that scans this table such as 684 * REPORT SUPPORTED OPERATION CODES. */ 685 static const struct opcode_info_t opcode_info_arr[SDEB_I_LAST_ELEM_P1 + 1] = { 686 /* 0 */ 687 {0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL, /* unknown opcodes */ 688 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} }, 689 {0, 0x12, 0, FF_RESPOND | F_D_IN, resp_inquiry, NULL, /* INQUIRY */ 690 {6, 0xe3, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} }, 691 {0, 0xa0, 0, FF_RESPOND | F_D_IN, resp_report_luns, NULL, 692 {12, 0xe3, 0xff, 0, 0, 0, 0xff, 0xff, 0xff, 0xff, 0, 0xc7, 0, 0, 693 0, 0} }, /* REPORT LUNS */ 694 {0, 0x3, 0, FF_RESPOND | F_D_IN, resp_requests, NULL, 695 {6, 0xe1, 0, 0, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} }, 696 {0, 0x0, 0, F_M_ACCESS | F_RL_WLUN_OK, NULL, NULL,/* TEST UNIT READY */ 697 {6, 0, 0, 0, 0, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} }, 698 /* 5 */ 699 {ARRAY_SIZE(msense_iarr), 0x5a, 0, F_D_IN, /* MODE SENSE(10) */ 700 resp_mode_sense, msense_iarr, {10, 0xf8, 0xff, 0xff, 0, 0, 0, 701 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0} }, 702 {ARRAY_SIZE(mselect_iarr), 0x55, 0, F_D_OUT, /* MODE SELECT(10) */ 703 resp_mode_select, mselect_iarr, {10, 0xf1, 0, 0, 0, 0, 0, 0xff, 704 0xff, 0xc7, 0, 0, 0, 0, 0, 0} }, 705 {0, 0x4d, 0, F_D_IN, resp_log_sense, NULL, /* LOG SENSE */ 706 {10, 0xe3, 0xff, 0xff, 0, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 707 0, 0, 0} }, 708 {0, 0x25, 0, F_D_IN, resp_readcap, NULL, /* READ CAPACITY(10) */ 709 {10, 0xe1, 0xff, 0xff, 0xff, 0xff, 0, 0, 0x1, 0xc7, 0, 0, 0, 0, 710 0, 0} }, 711 {ARRAY_SIZE(read_iarr), 0x88, 0, F_D_IN | FF_MEDIA_IO, /* READ(16) */ 712 resp_read_dt0, read_iarr, {16, 0xfe, 0xff, 0xff, 0xff, 0xff, 713 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc7} }, 714 /* 10 */ 715 {ARRAY_SIZE(write_iarr), 0x8a, 0, F_D_OUT | FF_MEDIA_IO, 716 resp_write_dt0, write_iarr, /* WRITE(16) */ 717 {16, 0xfa, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 718 0xff, 0xff, 0xff, 0xff, 0xff, 0xc7} }, 719 {0, 0x1b, 0, F_SSU_DELAY, resp_start_stop, NULL,/* START STOP UNIT */ 720 {6, 0x1, 0, 0xf, 0xf7, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} }, 721 {ARRAY_SIZE(sa_in_16_iarr), 0x9e, 0x10, F_SA_LOW | F_D_IN, 722 resp_readcap16, sa_in_16_iarr, /* SA_IN(16), READ CAPACITY(16) */ 723 {16, 0x10, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 724 0xff, 0xff, 0xff, 0xff, 0x1, 0xc7} }, 725 {0, 0x9f, 0x12, F_SA_LOW | F_D_OUT | FF_MEDIA_IO, resp_write_scat, 726 NULL, {16, 0x12, 0xf9, 0x0, 0xff, 0xff, 0, 0, 0xff, 0xff, 0xff, 727 0xff, 0xff, 0xff, 0xff, 0xc7} }, /* SA_OUT(16), WRITE SCAT(16) */ 728 {ARRAY_SIZE(maint_in_iarr), 0xa3, 0xa, F_SA_LOW | F_D_IN, 729 resp_report_tgtpgs, /* MAINT IN, REPORT TARGET PORT GROUPS */ 730 maint_in_iarr, {12, 0xea, 0, 0, 0, 0, 0xff, 0xff, 0xff, 731 0xff, 0, 0xc7, 0, 0, 0, 0} }, 732 /* 15 */ 733 {0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL, /* MAINT OUT */ 734 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} }, 735 {ARRAY_SIZE(verify_iarr), 0x8f, 0, 736 F_D_OUT_MAYBE | FF_MEDIA_IO, resp_verify, /* VERIFY(16) */ 737 verify_iarr, {16, 0xf6, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 738 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xc7} }, 739 {ARRAY_SIZE(vl_iarr), 0x7f, 0x9, F_SA_HIGH | F_D_IN | FF_MEDIA_IO, 740 resp_read_dt0, vl_iarr, /* VARIABLE LENGTH, READ(32) */ 741 {32, 0xc7, 0, 0, 0, 0, 0x3f, 0x18, 0x0, 0x9, 0xfe, 0, 0xff, 0xff, 742 0xff, 0xff} }, 743 {ARRAY_SIZE(reserve_iarr), 0x56, 0, F_D_OUT, 744 NULL, reserve_iarr, /* RESERVE(10) <no response function> */ 745 {10, 0xff, 0xff, 0xff, 0, 0, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 746 0} }, 747 {ARRAY_SIZE(release_iarr), 0x57, 0, F_D_OUT, 748 NULL, release_iarr, /* RELEASE(10) <no response function> */ 749 {10, 0x13, 0xff, 0xff, 0, 0, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 750 0} }, 751 /* 20 */ 752 {0, 0x1e, 0, 0, NULL, NULL, /* ALLOW REMOVAL */ 753 {6, 0, 0, 0, 0x3, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} }, 754 {0, 0x1, 0, 0, resp_start_stop, NULL, /* REWIND ?? */ 755 {6, 0x1, 0, 0, 0, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} }, 756 {0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL, /* ATA_PT */ 757 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} }, 758 {0, 0x1d, F_D_OUT, 0, NULL, NULL, /* SEND DIAGNOSTIC */ 759 {6, 0xf7, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} }, 760 {0, 0x42, 0, F_D_OUT | FF_MEDIA_IO, resp_unmap, NULL, /* UNMAP */ 761 {10, 0x1, 0, 0, 0, 0, 0x3f, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0} }, 762 /* 25 */ 763 {0, 0x3b, 0, F_D_OUT_MAYBE, resp_write_buffer, NULL, 764 {10, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0, 765 0, 0, 0, 0} }, /* WRITE_BUFFER */ 766 {ARRAY_SIZE(write_same_iarr), 0x41, 0, F_D_OUT_MAYBE | FF_MEDIA_IO, 767 resp_write_same_10, write_same_iarr, /* WRITE SAME(10) */ 768 {10, 0xff, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xff, 0xff, 0xc7, 0, 769 0, 0, 0, 0, 0} }, 770 {ARRAY_SIZE(sync_cache_iarr), 0x35, 0, F_SYNC_DELAY | F_M_ACCESS, 771 resp_sync_cache, sync_cache_iarr, 772 {10, 0x7, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xff, 0xff, 0xc7, 0, 0, 773 0, 0, 0, 0} }, /* SYNC_CACHE (10) */ 774 {0, 0x89, 0, F_D_OUT | FF_MEDIA_IO, resp_comp_write, NULL, 775 {16, 0xf8, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0, 0, 776 0, 0xff, 0x3f, 0xc7} }, /* COMPARE AND WRITE */ 777 {ARRAY_SIZE(pre_fetch_iarr), 0x34, 0, F_SYNC_DELAY | FF_MEDIA_IO, 778 resp_pre_fetch, pre_fetch_iarr, 779 {10, 0x2, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xff, 0xff, 0xc7, 0, 0, 780 0, 0, 0, 0} }, /* PRE-FETCH (10) */ 781 782 /* 30 */ 783 {ARRAY_SIZE(zone_out_iarr), 0x94, 0x3, F_SA_LOW | F_M_ACCESS, 784 resp_open_zone, zone_out_iarr, /* ZONE_OUT(16), OPEN ZONE) */ 785 {16, 0x3 /* SA */, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 786 0xff, 0xff, 0x0, 0x0, 0xff, 0xff, 0x1, 0xc7} }, 787 {ARRAY_SIZE(zone_in_iarr), 0x95, 0x0, F_SA_LOW | F_M_ACCESS, 788 resp_report_zones, zone_in_iarr, /* ZONE_IN(16), REPORT ZONES) */ 789 {16, 0x0 /* SA */, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 790 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xbf, 0xc7} }, 791 /* sentinel */ 792 {0xff, 0, 0, 0, NULL, NULL, /* terminating element */ 793 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} }, 794 }; 795 796 static int sdebug_num_hosts; 797 static int sdebug_add_host = DEF_NUM_HOST; /* in sysfs this is relative */ 798 static int sdebug_ato = DEF_ATO; 799 static int sdebug_cdb_len = DEF_CDB_LEN; 800 static int sdebug_jdelay = DEF_JDELAY; /* if > 0 then unit is jiffies */ 801 static int sdebug_dev_size_mb = DEF_DEV_SIZE_PRE_INIT; 802 static int sdebug_dif = DEF_DIF; 803 static int sdebug_dix = DEF_DIX; 804 static int sdebug_dsense = DEF_D_SENSE; 805 static int sdebug_every_nth = DEF_EVERY_NTH; 806 static int sdebug_fake_rw = DEF_FAKE_RW; 807 static unsigned int sdebug_guard = DEF_GUARD; 808 static int sdebug_host_max_queue; /* per host */ 809 static int sdebug_lowest_aligned = DEF_LOWEST_ALIGNED; 810 static int sdebug_max_luns = DEF_MAX_LUNS; 811 static int sdebug_max_queue = SDEBUG_CANQUEUE; /* per submit queue */ 812 static unsigned int sdebug_medium_error_start = OPT_MEDIUM_ERR_ADDR; 813 static int sdebug_medium_error_count = OPT_MEDIUM_ERR_NUM; 814 static int sdebug_ndelay = DEF_NDELAY; /* if > 0 then unit is nanoseconds */ 815 static int sdebug_no_lun_0 = DEF_NO_LUN_0; 816 static int sdebug_no_uld; 817 static int sdebug_num_parts = DEF_NUM_PARTS; 818 static int sdebug_num_tgts = DEF_NUM_TGTS; /* targets per host */ 819 static int sdebug_opt_blks = DEF_OPT_BLKS; 820 static int sdebug_opts = DEF_OPTS; 821 static int sdebug_physblk_exp = DEF_PHYSBLK_EXP; 822 static int sdebug_opt_xferlen_exp = DEF_OPT_XFERLEN_EXP; 823 static int sdebug_ptype = DEF_PTYPE; /* SCSI peripheral device type */ 824 static int sdebug_scsi_level = DEF_SCSI_LEVEL; 825 static int sdebug_sector_size = DEF_SECTOR_SIZE; 826 static int sdeb_tur_ms_to_ready = DEF_TUR_MS_TO_READY; 827 static int sdebug_virtual_gb = DEF_VIRTUAL_GB; 828 static int sdebug_vpd_use_hostno = DEF_VPD_USE_HOSTNO; 829 static unsigned int sdebug_lbpu = DEF_LBPU; 830 static unsigned int sdebug_lbpws = DEF_LBPWS; 831 static unsigned int sdebug_lbpws10 = DEF_LBPWS10; 832 static unsigned int sdebug_lbprz = DEF_LBPRZ; 833 static unsigned int sdebug_unmap_alignment = DEF_UNMAP_ALIGNMENT; 834 static unsigned int sdebug_unmap_granularity = DEF_UNMAP_GRANULARITY; 835 static unsigned int sdebug_unmap_max_blocks = DEF_UNMAP_MAX_BLOCKS; 836 static unsigned int sdebug_unmap_max_desc = DEF_UNMAP_MAX_DESC; 837 static unsigned int sdebug_write_same_length = DEF_WRITESAME_LENGTH; 838 static int sdebug_uuid_ctl = DEF_UUID_CTL; 839 static bool sdebug_random = DEF_RANDOM; 840 static bool sdebug_per_host_store = DEF_PER_HOST_STORE; 841 static bool sdebug_removable = DEF_REMOVABLE; 842 static bool sdebug_clustering; 843 static bool sdebug_host_lock = DEF_HOST_LOCK; 844 static bool sdebug_strict = DEF_STRICT; 845 static bool sdebug_any_injecting_opt; 846 static bool sdebug_no_rwlock; 847 static bool sdebug_verbose; 848 static bool have_dif_prot; 849 static bool write_since_sync; 850 static bool sdebug_statistics = DEF_STATISTICS; 851 static bool sdebug_wp; 852 static bool sdebug_allow_restart; 853 static enum { 854 BLK_ZONED_NONE = 0, 855 BLK_ZONED_HA = 1, 856 BLK_ZONED_HM = 2, 857 } sdeb_zbc_model = BLK_ZONED_NONE; 858 static char *sdeb_zbc_model_s; 859 860 enum sam_lun_addr_method {SAM_LUN_AM_PERIPHERAL = 0x0, 861 SAM_LUN_AM_FLAT = 0x1, 862 SAM_LUN_AM_LOGICAL_UNIT = 0x2, 863 SAM_LUN_AM_EXTENDED = 0x3}; 864 static enum sam_lun_addr_method sdebug_lun_am = SAM_LUN_AM_PERIPHERAL; 865 static int sdebug_lun_am_i = (int)SAM_LUN_AM_PERIPHERAL; 866 867 static unsigned int sdebug_store_sectors; 868 static sector_t sdebug_capacity; /* in sectors */ 869 870 /* old BIOS stuff, kernel may get rid of them but some mode sense pages 871 may still need them */ 872 static int sdebug_heads; /* heads per disk */ 873 static int sdebug_cylinders_per; /* cylinders per surface */ 874 static int sdebug_sectors_per; /* sectors per cylinder */ 875 876 static LIST_HEAD(sdebug_host_list); 877 static DEFINE_MUTEX(sdebug_host_list_mutex); 878 879 static struct xarray per_store_arr; 880 static struct xarray *per_store_ap = &per_store_arr; 881 static int sdeb_first_idx = -1; /* invalid index ==> none created */ 882 static int sdeb_most_recent_idx = -1; 883 static DEFINE_RWLOCK(sdeb_fake_rw_lck); /* need a RW lock when fake_rw=1 */ 884 885 static unsigned long map_size; 886 static int num_aborts; 887 static int num_dev_resets; 888 static int num_target_resets; 889 static int num_bus_resets; 890 static int num_host_resets; 891 static int dix_writes; 892 static int dix_reads; 893 static int dif_errors; 894 895 /* ZBC global data */ 896 static bool sdeb_zbc_in_use; /* true for host-aware and host-managed disks */ 897 static int sdeb_zbc_zone_cap_mb; 898 static int sdeb_zbc_zone_size_mb; 899 static int sdeb_zbc_max_open = DEF_ZBC_MAX_OPEN_ZONES; 900 static int sdeb_zbc_nr_conv = DEF_ZBC_NR_CONV_ZONES; 901 902 static int submit_queues = DEF_SUBMIT_QUEUES; /* > 1 for multi-queue (mq) */ 903 static int poll_queues; /* iouring iopoll interface.*/ 904 905 static atomic_long_t writes_by_group_number[64]; 906 907 static char sdebug_proc_name[] = MY_NAME; 908 static const char *my_name = MY_NAME; 909 910 static const struct bus_type pseudo_lld_bus; 911 912 static struct device_driver sdebug_driverfs_driver = { 913 .name = sdebug_proc_name, 914 .bus = &pseudo_lld_bus, 915 }; 916 917 static const int check_condition_result = 918 SAM_STAT_CHECK_CONDITION; 919 920 static const int illegal_condition_result = 921 (DID_ABORT << 16) | SAM_STAT_CHECK_CONDITION; 922 923 static const int device_qfull_result = 924 (DID_ABORT << 16) | SAM_STAT_TASK_SET_FULL; 925 926 static const int condition_met_result = SAM_STAT_CONDITION_MET; 927 928 static struct dentry *sdebug_debugfs_root; 929 930 static void sdebug_err_free(struct rcu_head *head) 931 { 932 struct sdebug_err_inject *inject = 933 container_of(head, typeof(*inject), rcu); 934 935 kfree(inject); 936 } 937 938 static void sdebug_err_add(struct scsi_device *sdev, struct sdebug_err_inject *new) 939 { 940 struct sdebug_dev_info *devip = (struct sdebug_dev_info *)sdev->hostdata; 941 struct sdebug_err_inject *err; 942 943 spin_lock(&devip->list_lock); 944 list_for_each_entry_rcu(err, &devip->inject_err_list, list) { 945 if (err->type == new->type && err->cmd == new->cmd) { 946 list_del_rcu(&err->list); 947 call_rcu(&err->rcu, sdebug_err_free); 948 } 949 } 950 951 list_add_tail_rcu(&new->list, &devip->inject_err_list); 952 spin_unlock(&devip->list_lock); 953 } 954 955 static int sdebug_err_remove(struct scsi_device *sdev, const char *buf, size_t count) 956 { 957 struct sdebug_dev_info *devip = (struct sdebug_dev_info *)sdev->hostdata; 958 struct sdebug_err_inject *err; 959 int type; 960 unsigned char cmd; 961 962 if (sscanf(buf, "- %d %hhx", &type, &cmd) != 2) { 963 kfree(buf); 964 return -EINVAL; 965 } 966 967 spin_lock(&devip->list_lock); 968 list_for_each_entry_rcu(err, &devip->inject_err_list, list) { 969 if (err->type == type && err->cmd == cmd) { 970 list_del_rcu(&err->list); 971 call_rcu(&err->rcu, sdebug_err_free); 972 spin_unlock(&devip->list_lock); 973 kfree(buf); 974 return count; 975 } 976 } 977 spin_unlock(&devip->list_lock); 978 979 kfree(buf); 980 return -EINVAL; 981 } 982 983 static int sdebug_error_show(struct seq_file *m, void *p) 984 { 985 struct scsi_device *sdev = (struct scsi_device *)m->private; 986 struct sdebug_dev_info *devip = (struct sdebug_dev_info *)sdev->hostdata; 987 struct sdebug_err_inject *err; 988 989 seq_puts(m, "Type\tCount\tCommand\n"); 990 991 rcu_read_lock(); 992 list_for_each_entry_rcu(err, &devip->inject_err_list, list) { 993 switch (err->type) { 994 case ERR_TMOUT_CMD: 995 case ERR_ABORT_CMD_FAILED: 996 case ERR_LUN_RESET_FAILED: 997 seq_printf(m, "%d\t%d\t0x%x\n", err->type, err->cnt, 998 err->cmd); 999 break; 1000 1001 case ERR_FAIL_QUEUE_CMD: 1002 seq_printf(m, "%d\t%d\t0x%x\t0x%x\n", err->type, 1003 err->cnt, err->cmd, err->queuecmd_ret); 1004 break; 1005 1006 case ERR_FAIL_CMD: 1007 seq_printf(m, "%d\t%d\t0x%x\t0x%x 0x%x 0x%x 0x%x 0x%x 0x%x\n", 1008 err->type, err->cnt, err->cmd, 1009 err->host_byte, err->driver_byte, 1010 err->status_byte, err->sense_key, 1011 err->asc, err->asq); 1012 break; 1013 } 1014 } 1015 rcu_read_unlock(); 1016 1017 return 0; 1018 } 1019 1020 static int sdebug_error_open(struct inode *inode, struct file *file) 1021 { 1022 return single_open(file, sdebug_error_show, inode->i_private); 1023 } 1024 1025 static ssize_t sdebug_error_write(struct file *file, const char __user *ubuf, 1026 size_t count, loff_t *ppos) 1027 { 1028 char *buf; 1029 unsigned int inject_type; 1030 struct sdebug_err_inject *inject; 1031 struct scsi_device *sdev = (struct scsi_device *)file->f_inode->i_private; 1032 1033 buf = kzalloc(count + 1, GFP_KERNEL); 1034 if (!buf) 1035 return -ENOMEM; 1036 1037 if (copy_from_user(buf, ubuf, count)) { 1038 kfree(buf); 1039 return -EFAULT; 1040 } 1041 1042 if (buf[0] == '-') 1043 return sdebug_err_remove(sdev, buf, count); 1044 1045 if (sscanf(buf, "%d", &inject_type) != 1) { 1046 kfree(buf); 1047 return -EINVAL; 1048 } 1049 1050 inject = kzalloc(sizeof(struct sdebug_err_inject), GFP_KERNEL); 1051 if (!inject) { 1052 kfree(buf); 1053 return -ENOMEM; 1054 } 1055 1056 switch (inject_type) { 1057 case ERR_TMOUT_CMD: 1058 case ERR_ABORT_CMD_FAILED: 1059 case ERR_LUN_RESET_FAILED: 1060 if (sscanf(buf, "%d %d %hhx", &inject->type, &inject->cnt, 1061 &inject->cmd) != 3) 1062 goto out_error; 1063 break; 1064 1065 case ERR_FAIL_QUEUE_CMD: 1066 if (sscanf(buf, "%d %d %hhx %x", &inject->type, &inject->cnt, 1067 &inject->cmd, &inject->queuecmd_ret) != 4) 1068 goto out_error; 1069 break; 1070 1071 case ERR_FAIL_CMD: 1072 if (sscanf(buf, "%d %d %hhx %hhx %hhx %hhx %hhx %hhx %hhx", 1073 &inject->type, &inject->cnt, &inject->cmd, 1074 &inject->host_byte, &inject->driver_byte, 1075 &inject->status_byte, &inject->sense_key, 1076 &inject->asc, &inject->asq) != 9) 1077 goto out_error; 1078 break; 1079 1080 default: 1081 goto out_error; 1082 break; 1083 } 1084 1085 kfree(buf); 1086 sdebug_err_add(sdev, inject); 1087 1088 return count; 1089 1090 out_error: 1091 kfree(buf); 1092 kfree(inject); 1093 return -EINVAL; 1094 } 1095 1096 static const struct file_operations sdebug_error_fops = { 1097 .open = sdebug_error_open, 1098 .read = seq_read, 1099 .write = sdebug_error_write, 1100 .release = single_release, 1101 }; 1102 1103 static int sdebug_target_reset_fail_show(struct seq_file *m, void *p) 1104 { 1105 struct scsi_target *starget = (struct scsi_target *)m->private; 1106 struct sdebug_target_info *targetip = 1107 (struct sdebug_target_info *)starget->hostdata; 1108 1109 if (targetip) 1110 seq_printf(m, "%c\n", targetip->reset_fail ? 'Y' : 'N'); 1111 1112 return 0; 1113 } 1114 1115 static int sdebug_target_reset_fail_open(struct inode *inode, struct file *file) 1116 { 1117 return single_open(file, sdebug_target_reset_fail_show, inode->i_private); 1118 } 1119 1120 static ssize_t sdebug_target_reset_fail_write(struct file *file, 1121 const char __user *ubuf, size_t count, loff_t *ppos) 1122 { 1123 int ret; 1124 struct scsi_target *starget = 1125 (struct scsi_target *)file->f_inode->i_private; 1126 struct sdebug_target_info *targetip = 1127 (struct sdebug_target_info *)starget->hostdata; 1128 1129 if (targetip) { 1130 ret = kstrtobool_from_user(ubuf, count, &targetip->reset_fail); 1131 return ret < 0 ? ret : count; 1132 } 1133 return -ENODEV; 1134 } 1135 1136 static const struct file_operations sdebug_target_reset_fail_fops = { 1137 .open = sdebug_target_reset_fail_open, 1138 .read = seq_read, 1139 .write = sdebug_target_reset_fail_write, 1140 .release = single_release, 1141 }; 1142 1143 static int sdebug_target_alloc(struct scsi_target *starget) 1144 { 1145 struct sdebug_target_info *targetip; 1146 1147 targetip = kzalloc(sizeof(struct sdebug_target_info), GFP_KERNEL); 1148 if (!targetip) 1149 return -ENOMEM; 1150 1151 targetip->debugfs_entry = debugfs_create_dir(dev_name(&starget->dev), 1152 sdebug_debugfs_root); 1153 1154 debugfs_create_file("fail_reset", 0600, targetip->debugfs_entry, starget, 1155 &sdebug_target_reset_fail_fops); 1156 1157 starget->hostdata = targetip; 1158 1159 return 0; 1160 } 1161 1162 static void sdebug_tartget_cleanup_async(void *data, async_cookie_t cookie) 1163 { 1164 struct sdebug_target_info *targetip = data; 1165 1166 debugfs_remove(targetip->debugfs_entry); 1167 kfree(targetip); 1168 } 1169 1170 static void sdebug_target_destroy(struct scsi_target *starget) 1171 { 1172 struct sdebug_target_info *targetip; 1173 1174 targetip = (struct sdebug_target_info *)starget->hostdata; 1175 if (targetip) { 1176 starget->hostdata = NULL; 1177 async_schedule(sdebug_tartget_cleanup_async, targetip); 1178 } 1179 } 1180 1181 /* Only do the extra work involved in logical block provisioning if one or 1182 * more of the lbpu, lbpws or lbpws10 parameters are given and we are doing 1183 * real reads and writes (i.e. not skipping them for speed). 1184 */ 1185 static inline bool scsi_debug_lbp(void) 1186 { 1187 return 0 == sdebug_fake_rw && 1188 (sdebug_lbpu || sdebug_lbpws || sdebug_lbpws10); 1189 } 1190 1191 static void *lba2fake_store(struct sdeb_store_info *sip, 1192 unsigned long long lba) 1193 { 1194 struct sdeb_store_info *lsip = sip; 1195 1196 lba = do_div(lba, sdebug_store_sectors); 1197 if (!sip || !sip->storep) { 1198 WARN_ON_ONCE(true); 1199 lsip = xa_load(per_store_ap, 0); /* should never be NULL */ 1200 } 1201 return lsip->storep + lba * sdebug_sector_size; 1202 } 1203 1204 static struct t10_pi_tuple *dif_store(struct sdeb_store_info *sip, 1205 sector_t sector) 1206 { 1207 sector = sector_div(sector, sdebug_store_sectors); 1208 1209 return sip->dif_storep + sector; 1210 } 1211 1212 static void sdebug_max_tgts_luns(void) 1213 { 1214 struct sdebug_host_info *sdbg_host; 1215 struct Scsi_Host *hpnt; 1216 1217 mutex_lock(&sdebug_host_list_mutex); 1218 list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) { 1219 hpnt = sdbg_host->shost; 1220 if ((hpnt->this_id >= 0) && 1221 (sdebug_num_tgts > hpnt->this_id)) 1222 hpnt->max_id = sdebug_num_tgts + 1; 1223 else 1224 hpnt->max_id = sdebug_num_tgts; 1225 /* sdebug_max_luns; */ 1226 hpnt->max_lun = SCSI_W_LUN_REPORT_LUNS + 1; 1227 } 1228 mutex_unlock(&sdebug_host_list_mutex); 1229 } 1230 1231 enum sdeb_cmd_data {SDEB_IN_DATA = 0, SDEB_IN_CDB = 1}; 1232 1233 /* Set in_bit to -1 to indicate no bit position of invalid field */ 1234 static void mk_sense_invalid_fld(struct scsi_cmnd *scp, 1235 enum sdeb_cmd_data c_d, 1236 int in_byte, int in_bit) 1237 { 1238 unsigned char *sbuff; 1239 u8 sks[4]; 1240 int sl, asc; 1241 1242 sbuff = scp->sense_buffer; 1243 if (!sbuff) { 1244 sdev_printk(KERN_ERR, scp->device, 1245 "%s: sense_buffer is NULL\n", __func__); 1246 return; 1247 } 1248 asc = c_d ? INVALID_FIELD_IN_CDB : INVALID_FIELD_IN_PARAM_LIST; 1249 memset(sbuff, 0, SCSI_SENSE_BUFFERSIZE); 1250 scsi_build_sense(scp, sdebug_dsense, ILLEGAL_REQUEST, asc, 0); 1251 memset(sks, 0, sizeof(sks)); 1252 sks[0] = 0x80; 1253 if (c_d) 1254 sks[0] |= 0x40; 1255 if (in_bit >= 0) { 1256 sks[0] |= 0x8; 1257 sks[0] |= 0x7 & in_bit; 1258 } 1259 put_unaligned_be16(in_byte, sks + 1); 1260 if (sdebug_dsense) { 1261 sl = sbuff[7] + 8; 1262 sbuff[7] = sl; 1263 sbuff[sl] = 0x2; 1264 sbuff[sl + 1] = 0x6; 1265 memcpy(sbuff + sl + 4, sks, 3); 1266 } else 1267 memcpy(sbuff + 15, sks, 3); 1268 if (sdebug_verbose) 1269 sdev_printk(KERN_INFO, scp->device, "%s: [sense_key,asc,ascq" 1270 "]: [0x5,0x%x,0x0] %c byte=%d, bit=%d\n", 1271 my_name, asc, c_d ? 'C' : 'D', in_byte, in_bit); 1272 } 1273 1274 static void mk_sense_buffer(struct scsi_cmnd *scp, int key, int asc, int asq) 1275 { 1276 if (!scp->sense_buffer) { 1277 sdev_printk(KERN_ERR, scp->device, 1278 "%s: sense_buffer is NULL\n", __func__); 1279 return; 1280 } 1281 memset(scp->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE); 1282 1283 scsi_build_sense(scp, sdebug_dsense, key, asc, asq); 1284 1285 if (sdebug_verbose) 1286 sdev_printk(KERN_INFO, scp->device, 1287 "%s: [sense_key,asc,ascq]: [0x%x,0x%x,0x%x]\n", 1288 my_name, key, asc, asq); 1289 } 1290 1291 static void mk_sense_invalid_opcode(struct scsi_cmnd *scp) 1292 { 1293 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_OPCODE, 0); 1294 } 1295 1296 static int scsi_debug_ioctl(struct scsi_device *dev, unsigned int cmd, 1297 void __user *arg) 1298 { 1299 if (sdebug_verbose) { 1300 if (0x1261 == cmd) 1301 sdev_printk(KERN_INFO, dev, 1302 "%s: BLKFLSBUF [0x1261]\n", __func__); 1303 else if (0x5331 == cmd) 1304 sdev_printk(KERN_INFO, dev, 1305 "%s: CDROM_GET_CAPABILITY [0x5331]\n", 1306 __func__); 1307 else 1308 sdev_printk(KERN_INFO, dev, "%s: cmd=0x%x\n", 1309 __func__, cmd); 1310 } 1311 return -EINVAL; 1312 /* return -ENOTTY; // correct return but upsets fdisk */ 1313 } 1314 1315 static void config_cdb_len(struct scsi_device *sdev) 1316 { 1317 switch (sdebug_cdb_len) { 1318 case 6: /* suggest 6 byte READ, WRITE and MODE SENSE/SELECT */ 1319 sdev->use_10_for_rw = false; 1320 sdev->use_16_for_rw = false; 1321 sdev->use_10_for_ms = false; 1322 break; 1323 case 10: /* suggest 10 byte RWs and 6 byte MODE SENSE/SELECT */ 1324 sdev->use_10_for_rw = true; 1325 sdev->use_16_for_rw = false; 1326 sdev->use_10_for_ms = false; 1327 break; 1328 case 12: /* suggest 10 byte RWs and 10 byte MODE SENSE/SELECT */ 1329 sdev->use_10_for_rw = true; 1330 sdev->use_16_for_rw = false; 1331 sdev->use_10_for_ms = true; 1332 break; 1333 case 16: 1334 sdev->use_10_for_rw = false; 1335 sdev->use_16_for_rw = true; 1336 sdev->use_10_for_ms = true; 1337 break; 1338 case 32: /* No knobs to suggest this so same as 16 for now */ 1339 sdev->use_10_for_rw = false; 1340 sdev->use_16_for_rw = true; 1341 sdev->use_10_for_ms = true; 1342 break; 1343 default: 1344 pr_warn("unexpected cdb_len=%d, force to 10\n", 1345 sdebug_cdb_len); 1346 sdev->use_10_for_rw = true; 1347 sdev->use_16_for_rw = false; 1348 sdev->use_10_for_ms = false; 1349 sdebug_cdb_len = 10; 1350 break; 1351 } 1352 } 1353 1354 static void all_config_cdb_len(void) 1355 { 1356 struct sdebug_host_info *sdbg_host; 1357 struct Scsi_Host *shost; 1358 struct scsi_device *sdev; 1359 1360 mutex_lock(&sdebug_host_list_mutex); 1361 list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) { 1362 shost = sdbg_host->shost; 1363 shost_for_each_device(sdev, shost) { 1364 config_cdb_len(sdev); 1365 } 1366 } 1367 mutex_unlock(&sdebug_host_list_mutex); 1368 } 1369 1370 static void clear_luns_changed_on_target(struct sdebug_dev_info *devip) 1371 { 1372 struct sdebug_host_info *sdhp = devip->sdbg_host; 1373 struct sdebug_dev_info *dp; 1374 1375 list_for_each_entry(dp, &sdhp->dev_info_list, dev_list) { 1376 if ((devip->sdbg_host == dp->sdbg_host) && 1377 (devip->target == dp->target)) { 1378 clear_bit(SDEBUG_UA_LUNS_CHANGED, dp->uas_bm); 1379 } 1380 } 1381 } 1382 1383 static int make_ua(struct scsi_cmnd *scp, struct sdebug_dev_info *devip) 1384 { 1385 int k; 1386 1387 k = find_first_bit(devip->uas_bm, SDEBUG_NUM_UAS); 1388 if (k != SDEBUG_NUM_UAS) { 1389 const char *cp = NULL; 1390 1391 switch (k) { 1392 case SDEBUG_UA_POR: 1393 mk_sense_buffer(scp, UNIT_ATTENTION, UA_RESET_ASC, 1394 POWER_ON_RESET_ASCQ); 1395 if (sdebug_verbose) 1396 cp = "power on reset"; 1397 break; 1398 case SDEBUG_UA_POOCCUR: 1399 mk_sense_buffer(scp, UNIT_ATTENTION, UA_RESET_ASC, 1400 POWER_ON_OCCURRED_ASCQ); 1401 if (sdebug_verbose) 1402 cp = "power on occurred"; 1403 break; 1404 case SDEBUG_UA_BUS_RESET: 1405 mk_sense_buffer(scp, UNIT_ATTENTION, UA_RESET_ASC, 1406 BUS_RESET_ASCQ); 1407 if (sdebug_verbose) 1408 cp = "bus reset"; 1409 break; 1410 case SDEBUG_UA_MODE_CHANGED: 1411 mk_sense_buffer(scp, UNIT_ATTENTION, UA_CHANGED_ASC, 1412 MODE_CHANGED_ASCQ); 1413 if (sdebug_verbose) 1414 cp = "mode parameters changed"; 1415 break; 1416 case SDEBUG_UA_CAPACITY_CHANGED: 1417 mk_sense_buffer(scp, UNIT_ATTENTION, UA_CHANGED_ASC, 1418 CAPACITY_CHANGED_ASCQ); 1419 if (sdebug_verbose) 1420 cp = "capacity data changed"; 1421 break; 1422 case SDEBUG_UA_MICROCODE_CHANGED: 1423 mk_sense_buffer(scp, UNIT_ATTENTION, 1424 TARGET_CHANGED_ASC, 1425 MICROCODE_CHANGED_ASCQ); 1426 if (sdebug_verbose) 1427 cp = "microcode has been changed"; 1428 break; 1429 case SDEBUG_UA_MICROCODE_CHANGED_WO_RESET: 1430 mk_sense_buffer(scp, UNIT_ATTENTION, 1431 TARGET_CHANGED_ASC, 1432 MICROCODE_CHANGED_WO_RESET_ASCQ); 1433 if (sdebug_verbose) 1434 cp = "microcode has been changed without reset"; 1435 break; 1436 case SDEBUG_UA_LUNS_CHANGED: 1437 /* 1438 * SPC-3 behavior is to report a UNIT ATTENTION with 1439 * ASC/ASCQ REPORTED LUNS DATA HAS CHANGED on every LUN 1440 * on the target, until a REPORT LUNS command is 1441 * received. SPC-4 behavior is to report it only once. 1442 * NOTE: sdebug_scsi_level does not use the same 1443 * values as struct scsi_device->scsi_level. 1444 */ 1445 if (sdebug_scsi_level >= 6) /* SPC-4 and above */ 1446 clear_luns_changed_on_target(devip); 1447 mk_sense_buffer(scp, UNIT_ATTENTION, 1448 TARGET_CHANGED_ASC, 1449 LUNS_CHANGED_ASCQ); 1450 if (sdebug_verbose) 1451 cp = "reported luns data has changed"; 1452 break; 1453 default: 1454 pr_warn("unexpected unit attention code=%d\n", k); 1455 if (sdebug_verbose) 1456 cp = "unknown"; 1457 break; 1458 } 1459 clear_bit(k, devip->uas_bm); 1460 if (sdebug_verbose) 1461 sdev_printk(KERN_INFO, scp->device, 1462 "%s reports: Unit attention: %s\n", 1463 my_name, cp); 1464 return check_condition_result; 1465 } 1466 return 0; 1467 } 1468 1469 /* Build SCSI "data-in" buffer. Returns 0 if ok else (DID_ERROR << 16). */ 1470 static int fill_from_dev_buffer(struct scsi_cmnd *scp, unsigned char *arr, 1471 int arr_len) 1472 { 1473 int act_len; 1474 struct scsi_data_buffer *sdb = &scp->sdb; 1475 1476 if (!sdb->length) 1477 return 0; 1478 if (scp->sc_data_direction != DMA_FROM_DEVICE) 1479 return DID_ERROR << 16; 1480 1481 act_len = sg_copy_from_buffer(sdb->table.sgl, sdb->table.nents, 1482 arr, arr_len); 1483 scsi_set_resid(scp, scsi_bufflen(scp) - act_len); 1484 1485 return 0; 1486 } 1487 1488 /* Partial build of SCSI "data-in" buffer. Returns 0 if ok else 1489 * (DID_ERROR << 16). Can write to offset in data-in buffer. If multiple 1490 * calls, not required to write in ascending offset order. Assumes resid 1491 * set to scsi_bufflen() prior to any calls. 1492 */ 1493 static int p_fill_from_dev_buffer(struct scsi_cmnd *scp, const void *arr, 1494 int arr_len, unsigned int off_dst) 1495 { 1496 unsigned int act_len, n; 1497 struct scsi_data_buffer *sdb = &scp->sdb; 1498 off_t skip = off_dst; 1499 1500 if (sdb->length <= off_dst) 1501 return 0; 1502 if (scp->sc_data_direction != DMA_FROM_DEVICE) 1503 return DID_ERROR << 16; 1504 1505 act_len = sg_pcopy_from_buffer(sdb->table.sgl, sdb->table.nents, 1506 arr, arr_len, skip); 1507 pr_debug("%s: off_dst=%u, scsi_bufflen=%u, act_len=%u, resid=%d\n", 1508 __func__, off_dst, scsi_bufflen(scp), act_len, 1509 scsi_get_resid(scp)); 1510 n = scsi_bufflen(scp) - (off_dst + act_len); 1511 scsi_set_resid(scp, min_t(u32, scsi_get_resid(scp), n)); 1512 return 0; 1513 } 1514 1515 /* Fetches from SCSI "data-out" buffer. Returns number of bytes fetched into 1516 * 'arr' or -1 if error. 1517 */ 1518 static int fetch_to_dev_buffer(struct scsi_cmnd *scp, unsigned char *arr, 1519 int arr_len) 1520 { 1521 if (!scsi_bufflen(scp)) 1522 return 0; 1523 if (scp->sc_data_direction != DMA_TO_DEVICE) 1524 return -1; 1525 1526 return scsi_sg_copy_to_buffer(scp, arr, arr_len); 1527 } 1528 1529 1530 static char sdebug_inq_vendor_id[9] = "Linux "; 1531 static char sdebug_inq_product_id[17] = "scsi_debug "; 1532 static char sdebug_inq_product_rev[5] = SDEBUG_VERSION; 1533 /* Use some locally assigned NAAs for SAS addresses. */ 1534 static const u64 naa3_comp_a = 0x3222222000000000ULL; 1535 static const u64 naa3_comp_b = 0x3333333000000000ULL; 1536 static const u64 naa3_comp_c = 0x3111111000000000ULL; 1537 1538 /* Device identification VPD page. Returns number of bytes placed in arr */ 1539 static int inquiry_vpd_83(unsigned char *arr, int port_group_id, 1540 int target_dev_id, int dev_id_num, 1541 const char *dev_id_str, int dev_id_str_len, 1542 const uuid_t *lu_name) 1543 { 1544 int num, port_a; 1545 char b[32]; 1546 1547 port_a = target_dev_id + 1; 1548 /* T10 vendor identifier field format (faked) */ 1549 arr[0] = 0x2; /* ASCII */ 1550 arr[1] = 0x1; 1551 arr[2] = 0x0; 1552 memcpy(&arr[4], sdebug_inq_vendor_id, 8); 1553 memcpy(&arr[12], sdebug_inq_product_id, 16); 1554 memcpy(&arr[28], dev_id_str, dev_id_str_len); 1555 num = 8 + 16 + dev_id_str_len; 1556 arr[3] = num; 1557 num += 4; 1558 if (dev_id_num >= 0) { 1559 if (sdebug_uuid_ctl) { 1560 /* Locally assigned UUID */ 1561 arr[num++] = 0x1; /* binary (not necessarily sas) */ 1562 arr[num++] = 0xa; /* PIV=0, lu, naa */ 1563 arr[num++] = 0x0; 1564 arr[num++] = 0x12; 1565 arr[num++] = 0x10; /* uuid type=1, locally assigned */ 1566 arr[num++] = 0x0; 1567 memcpy(arr + num, lu_name, 16); 1568 num += 16; 1569 } else { 1570 /* NAA-3, Logical unit identifier (binary) */ 1571 arr[num++] = 0x1; /* binary (not necessarily sas) */ 1572 arr[num++] = 0x3; /* PIV=0, lu, naa */ 1573 arr[num++] = 0x0; 1574 arr[num++] = 0x8; 1575 put_unaligned_be64(naa3_comp_b + dev_id_num, arr + num); 1576 num += 8; 1577 } 1578 /* Target relative port number */ 1579 arr[num++] = 0x61; /* proto=sas, binary */ 1580 arr[num++] = 0x94; /* PIV=1, target port, rel port */ 1581 arr[num++] = 0x0; /* reserved */ 1582 arr[num++] = 0x4; /* length */ 1583 arr[num++] = 0x0; /* reserved */ 1584 arr[num++] = 0x0; /* reserved */ 1585 arr[num++] = 0x0; 1586 arr[num++] = 0x1; /* relative port A */ 1587 } 1588 /* NAA-3, Target port identifier */ 1589 arr[num++] = 0x61; /* proto=sas, binary */ 1590 arr[num++] = 0x93; /* piv=1, target port, naa */ 1591 arr[num++] = 0x0; 1592 arr[num++] = 0x8; 1593 put_unaligned_be64(naa3_comp_a + port_a, arr + num); 1594 num += 8; 1595 /* NAA-3, Target port group identifier */ 1596 arr[num++] = 0x61; /* proto=sas, binary */ 1597 arr[num++] = 0x95; /* piv=1, target port group id */ 1598 arr[num++] = 0x0; 1599 arr[num++] = 0x4; 1600 arr[num++] = 0; 1601 arr[num++] = 0; 1602 put_unaligned_be16(port_group_id, arr + num); 1603 num += 2; 1604 /* NAA-3, Target device identifier */ 1605 arr[num++] = 0x61; /* proto=sas, binary */ 1606 arr[num++] = 0xa3; /* piv=1, target device, naa */ 1607 arr[num++] = 0x0; 1608 arr[num++] = 0x8; 1609 put_unaligned_be64(naa3_comp_a + target_dev_id, arr + num); 1610 num += 8; 1611 /* SCSI name string: Target device identifier */ 1612 arr[num++] = 0x63; /* proto=sas, UTF-8 */ 1613 arr[num++] = 0xa8; /* piv=1, target device, SCSI name string */ 1614 arr[num++] = 0x0; 1615 arr[num++] = 24; 1616 memcpy(arr + num, "naa.32222220", 12); 1617 num += 12; 1618 snprintf(b, sizeof(b), "%08X", target_dev_id); 1619 memcpy(arr + num, b, 8); 1620 num += 8; 1621 memset(arr + num, 0, 4); 1622 num += 4; 1623 return num; 1624 } 1625 1626 static unsigned char vpd84_data[] = { 1627 /* from 4th byte */ 0x22,0x22,0x22,0x0,0xbb,0x0, 1628 0x22,0x22,0x22,0x0,0xbb,0x1, 1629 0x22,0x22,0x22,0x0,0xbb,0x2, 1630 }; 1631 1632 /* Software interface identification VPD page */ 1633 static int inquiry_vpd_84(unsigned char *arr) 1634 { 1635 memcpy(arr, vpd84_data, sizeof(vpd84_data)); 1636 return sizeof(vpd84_data); 1637 } 1638 1639 /* Management network addresses VPD page */ 1640 static int inquiry_vpd_85(unsigned char *arr) 1641 { 1642 int num = 0; 1643 const char *na1 = "https://www.kernel.org/config"; 1644 const char *na2 = "http://www.kernel.org/log"; 1645 int plen, olen; 1646 1647 arr[num++] = 0x1; /* lu, storage config */ 1648 arr[num++] = 0x0; /* reserved */ 1649 arr[num++] = 0x0; 1650 olen = strlen(na1); 1651 plen = olen + 1; 1652 if (plen % 4) 1653 plen = ((plen / 4) + 1) * 4; 1654 arr[num++] = plen; /* length, null termianted, padded */ 1655 memcpy(arr + num, na1, olen); 1656 memset(arr + num + olen, 0, plen - olen); 1657 num += plen; 1658 1659 arr[num++] = 0x4; /* lu, logging */ 1660 arr[num++] = 0x0; /* reserved */ 1661 arr[num++] = 0x0; 1662 olen = strlen(na2); 1663 plen = olen + 1; 1664 if (plen % 4) 1665 plen = ((plen / 4) + 1) * 4; 1666 arr[num++] = plen; /* length, null terminated, padded */ 1667 memcpy(arr + num, na2, olen); 1668 memset(arr + num + olen, 0, plen - olen); 1669 num += plen; 1670 1671 return num; 1672 } 1673 1674 /* SCSI ports VPD page */ 1675 static int inquiry_vpd_88(unsigned char *arr, int target_dev_id) 1676 { 1677 int num = 0; 1678 int port_a, port_b; 1679 1680 port_a = target_dev_id + 1; 1681 port_b = port_a + 1; 1682 arr[num++] = 0x0; /* reserved */ 1683 arr[num++] = 0x0; /* reserved */ 1684 arr[num++] = 0x0; 1685 arr[num++] = 0x1; /* relative port 1 (primary) */ 1686 memset(arr + num, 0, 6); 1687 num += 6; 1688 arr[num++] = 0x0; 1689 arr[num++] = 12; /* length tp descriptor */ 1690 /* naa-5 target port identifier (A) */ 1691 arr[num++] = 0x61; /* proto=sas, binary */ 1692 arr[num++] = 0x93; /* PIV=1, target port, NAA */ 1693 arr[num++] = 0x0; /* reserved */ 1694 arr[num++] = 0x8; /* length */ 1695 put_unaligned_be64(naa3_comp_a + port_a, arr + num); 1696 num += 8; 1697 arr[num++] = 0x0; /* reserved */ 1698 arr[num++] = 0x0; /* reserved */ 1699 arr[num++] = 0x0; 1700 arr[num++] = 0x2; /* relative port 2 (secondary) */ 1701 memset(arr + num, 0, 6); 1702 num += 6; 1703 arr[num++] = 0x0; 1704 arr[num++] = 12; /* length tp descriptor */ 1705 /* naa-5 target port identifier (B) */ 1706 arr[num++] = 0x61; /* proto=sas, binary */ 1707 arr[num++] = 0x93; /* PIV=1, target port, NAA */ 1708 arr[num++] = 0x0; /* reserved */ 1709 arr[num++] = 0x8; /* length */ 1710 put_unaligned_be64(naa3_comp_a + port_b, arr + num); 1711 num += 8; 1712 1713 return num; 1714 } 1715 1716 1717 static unsigned char vpd89_data[] = { 1718 /* from 4th byte */ 0,0,0,0, 1719 'l','i','n','u','x',' ',' ',' ', 1720 'S','A','T',' ','s','c','s','i','_','d','e','b','u','g',' ',' ', 1721 '1','2','3','4', 1722 0x34,0,0,0,1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0, 1723 0xec,0,0,0, 1724 0x5a,0xc,0xff,0x3f,0x37,0xc8,0x10,0,0,0,0,0,0x3f,0,0,0, 1725 0,0,0,0,0x58,0x58,0x58,0x58,0x58,0x58,0x58,0x58,0x20,0x20,0x20,0x20, 1726 0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0,0,0,0x40,0x4,0,0x2e,0x33, 1727 0x38,0x31,0x20,0x20,0x20,0x20,0x54,0x53,0x38,0x33,0x30,0x30,0x33,0x31, 1728 0x53,0x41, 1729 0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20, 1730 0x20,0x20, 1731 0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20, 1732 0x10,0x80, 1733 0,0,0,0x2f,0,0,0,0x2,0,0x2,0x7,0,0xff,0xff,0x1,0, 1734 0x3f,0,0xc1,0xff,0x3e,0,0x10,0x1,0xb0,0xf8,0x50,0x9,0,0,0x7,0, 1735 0x3,0,0x78,0,0x78,0,0xf0,0,0x78,0,0,0,0,0,0,0, 1736 0,0,0,0,0,0,0,0,0x2,0,0,0,0,0,0,0, 1737 0x7e,0,0x1b,0,0x6b,0x34,0x1,0x7d,0x3,0x40,0x69,0x34,0x1,0x3c,0x3,0x40, 1738 0x7f,0x40,0,0,0,0,0xfe,0xfe,0,0,0,0,0,0xfe,0,0, 1739 0,0,0,0,0,0,0,0,0xb0,0xf8,0x50,0x9,0,0,0,0, 1740 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 1741 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 1742 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 1743 0x1,0,0xb0,0xf8,0x50,0x9,0xb0,0xf8,0x50,0x9,0x20,0x20,0x2,0,0xb6,0x42, 1744 0,0x80,0x8a,0,0x6,0x3c,0xa,0x3c,0xff,0xff,0xc6,0x7,0,0x1,0,0x8, 1745 0xf0,0xf,0,0x10,0x2,0,0x30,0,0,0,0,0,0,0,0x6,0xfe, 1746 0,0,0x2,0,0x50,0,0x8a,0,0x4f,0x95,0,0,0x21,0,0xb,0, 1747 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 1748 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 1749 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 1750 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 1751 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 1752 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 1753 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 1754 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 1755 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 1756 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 1757 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 1758 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0xa5,0x51, 1759 }; 1760 1761 /* ATA Information VPD page */ 1762 static int inquiry_vpd_89(unsigned char *arr) 1763 { 1764 memcpy(arr, vpd89_data, sizeof(vpd89_data)); 1765 return sizeof(vpd89_data); 1766 } 1767 1768 1769 static unsigned char vpdb0_data[] = { 1770 /* from 4th byte */ 0,0,0,4, 0,0,0x4,0, 0,0,0,64, 1771 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 1772 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 1773 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 1774 }; 1775 1776 /* Block limits VPD page (SBC-3) */ 1777 static int inquiry_vpd_b0(unsigned char *arr) 1778 { 1779 unsigned int gran; 1780 1781 memcpy(arr, vpdb0_data, sizeof(vpdb0_data)); 1782 1783 /* Optimal transfer length granularity */ 1784 if (sdebug_opt_xferlen_exp != 0 && 1785 sdebug_physblk_exp < sdebug_opt_xferlen_exp) 1786 gran = 1 << sdebug_opt_xferlen_exp; 1787 else 1788 gran = 1 << sdebug_physblk_exp; 1789 put_unaligned_be16(gran, arr + 2); 1790 1791 /* Maximum Transfer Length */ 1792 if (sdebug_store_sectors > 0x400) 1793 put_unaligned_be32(sdebug_store_sectors, arr + 4); 1794 1795 /* Optimal Transfer Length */ 1796 put_unaligned_be32(sdebug_opt_blks, &arr[8]); 1797 1798 if (sdebug_lbpu) { 1799 /* Maximum Unmap LBA Count */ 1800 put_unaligned_be32(sdebug_unmap_max_blocks, &arr[16]); 1801 1802 /* Maximum Unmap Block Descriptor Count */ 1803 put_unaligned_be32(sdebug_unmap_max_desc, &arr[20]); 1804 } 1805 1806 /* Unmap Granularity Alignment */ 1807 if (sdebug_unmap_alignment) { 1808 put_unaligned_be32(sdebug_unmap_alignment, &arr[28]); 1809 arr[28] |= 0x80; /* UGAVALID */ 1810 } 1811 1812 /* Optimal Unmap Granularity */ 1813 put_unaligned_be32(sdebug_unmap_granularity, &arr[24]); 1814 1815 /* Maximum WRITE SAME Length */ 1816 put_unaligned_be64(sdebug_write_same_length, &arr[32]); 1817 1818 return 0x3c; /* Mandatory page length for Logical Block Provisioning */ 1819 } 1820 1821 /* Block device characteristics VPD page (SBC-3) */ 1822 static int inquiry_vpd_b1(struct sdebug_dev_info *devip, unsigned char *arr) 1823 { 1824 memset(arr, 0, 0x3c); 1825 arr[0] = 0; 1826 arr[1] = 1; /* non rotating medium (e.g. solid state) */ 1827 arr[2] = 0; 1828 arr[3] = 5; /* less than 1.8" */ 1829 1830 return 0x3c; 1831 } 1832 1833 /* Logical block provisioning VPD page (SBC-4) */ 1834 static int inquiry_vpd_b2(unsigned char *arr) 1835 { 1836 memset(arr, 0, 0x4); 1837 arr[0] = 0; /* threshold exponent */ 1838 if (sdebug_lbpu) 1839 arr[1] = 1 << 7; 1840 if (sdebug_lbpws) 1841 arr[1] |= 1 << 6; 1842 if (sdebug_lbpws10) 1843 arr[1] |= 1 << 5; 1844 if (sdebug_lbprz && scsi_debug_lbp()) 1845 arr[1] |= (sdebug_lbprz & 0x7) << 2; /* sbc4r07 and later */ 1846 /* anc_sup=0; dp=0 (no provisioning group descriptor) */ 1847 /* minimum_percentage=0; provisioning_type=0 (unknown) */ 1848 /* threshold_percentage=0 */ 1849 return 0x4; 1850 } 1851 1852 /* Zoned block device characteristics VPD page (ZBC mandatory) */ 1853 static int inquiry_vpd_b6(struct sdebug_dev_info *devip, unsigned char *arr) 1854 { 1855 memset(arr, 0, 0x3c); 1856 arr[0] = 0x1; /* set URSWRZ (unrestricted read in seq. wr req zone) */ 1857 /* 1858 * Set Optimal number of open sequential write preferred zones and 1859 * Optimal number of non-sequentially written sequential write 1860 * preferred zones fields to 'not reported' (0xffffffff). Leave other 1861 * fields set to zero, apart from Max. number of open swrz_s field. 1862 */ 1863 put_unaligned_be32(0xffffffff, &arr[4]); 1864 put_unaligned_be32(0xffffffff, &arr[8]); 1865 if (sdeb_zbc_model == BLK_ZONED_HM && devip->max_open) 1866 put_unaligned_be32(devip->max_open, &arr[12]); 1867 else 1868 put_unaligned_be32(0xffffffff, &arr[12]); 1869 if (devip->zcap < devip->zsize) { 1870 arr[19] = ZBC_CONSTANT_ZONE_START_OFFSET; 1871 put_unaligned_be64(devip->zsize, &arr[20]); 1872 } else { 1873 arr[19] = 0; 1874 } 1875 return 0x3c; 1876 } 1877 1878 #define SDEBUG_BLE_LEN_AFTER_B4 28 /* thus vpage 32 bytes long */ 1879 1880 enum { MAXIMUM_NUMBER_OF_STREAMS = 6, PERMANENT_STREAM_COUNT = 5 }; 1881 1882 /* Block limits extension VPD page (SBC-4) */ 1883 static int inquiry_vpd_b7(unsigned char *arrb4) 1884 { 1885 memset(arrb4, 0, SDEBUG_BLE_LEN_AFTER_B4); 1886 arrb4[1] = 1; /* Reduced stream control support (RSCS) */ 1887 put_unaligned_be16(MAXIMUM_NUMBER_OF_STREAMS, &arrb4[2]); 1888 return SDEBUG_BLE_LEN_AFTER_B4; 1889 } 1890 1891 #define SDEBUG_LONG_INQ_SZ 96 1892 #define SDEBUG_MAX_INQ_ARR_SZ 584 1893 1894 static int resp_inquiry(struct scsi_cmnd *scp, struct sdebug_dev_info *devip) 1895 { 1896 unsigned char pq_pdt; 1897 unsigned char *arr; 1898 unsigned char *cmd = scp->cmnd; 1899 u32 alloc_len, n; 1900 int ret; 1901 bool have_wlun, is_disk, is_zbc, is_disk_zbc; 1902 1903 alloc_len = get_unaligned_be16(cmd + 3); 1904 arr = kzalloc(SDEBUG_MAX_INQ_ARR_SZ, GFP_ATOMIC); 1905 if (! arr) 1906 return DID_REQUEUE << 16; 1907 is_disk = (sdebug_ptype == TYPE_DISK); 1908 is_zbc = devip->zoned; 1909 is_disk_zbc = (is_disk || is_zbc); 1910 have_wlun = scsi_is_wlun(scp->device->lun); 1911 if (have_wlun) 1912 pq_pdt = TYPE_WLUN; /* present, wlun */ 1913 else if (sdebug_no_lun_0 && (devip->lun == SDEBUG_LUN_0_VAL)) 1914 pq_pdt = 0x7f; /* not present, PQ=3, PDT=0x1f */ 1915 else 1916 pq_pdt = (sdebug_ptype & 0x1f); 1917 arr[0] = pq_pdt; 1918 if (0x2 & cmd[1]) { /* CMDDT bit set */ 1919 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 1); 1920 kfree(arr); 1921 return check_condition_result; 1922 } else if (0x1 & cmd[1]) { /* EVPD bit set */ 1923 int lu_id_num, port_group_id, target_dev_id; 1924 u32 len; 1925 char lu_id_str[6]; 1926 int host_no = devip->sdbg_host->shost->host_no; 1927 1928 arr[1] = cmd[2]; 1929 port_group_id = (((host_no + 1) & 0x7f) << 8) + 1930 (devip->channel & 0x7f); 1931 if (sdebug_vpd_use_hostno == 0) 1932 host_no = 0; 1933 lu_id_num = have_wlun ? -1 : (((host_no + 1) * 2000) + 1934 (devip->target * 1000) + devip->lun); 1935 target_dev_id = ((host_no + 1) * 2000) + 1936 (devip->target * 1000) - 3; 1937 len = scnprintf(lu_id_str, 6, "%d", lu_id_num); 1938 if (0 == cmd[2]) { /* supported vital product data pages */ 1939 n = 4; 1940 arr[n++] = 0x0; /* this page */ 1941 arr[n++] = 0x80; /* unit serial number */ 1942 arr[n++] = 0x83; /* device identification */ 1943 arr[n++] = 0x84; /* software interface ident. */ 1944 arr[n++] = 0x85; /* management network addresses */ 1945 arr[n++] = 0x86; /* extended inquiry */ 1946 arr[n++] = 0x87; /* mode page policy */ 1947 arr[n++] = 0x88; /* SCSI ports */ 1948 if (is_disk_zbc) { /* SBC or ZBC */ 1949 arr[n++] = 0x89; /* ATA information */ 1950 arr[n++] = 0xb0; /* Block limits */ 1951 arr[n++] = 0xb1; /* Block characteristics */ 1952 if (is_disk) 1953 arr[n++] = 0xb2; /* LB Provisioning */ 1954 if (is_zbc) 1955 arr[n++] = 0xb6; /* ZB dev. char. */ 1956 arr[n++] = 0xb7; /* Block limits extension */ 1957 } 1958 arr[3] = n - 4; /* number of supported VPD pages */ 1959 } else if (0x80 == cmd[2]) { /* unit serial number */ 1960 arr[3] = len; 1961 memcpy(&arr[4], lu_id_str, len); 1962 } else if (0x83 == cmd[2]) { /* device identification */ 1963 arr[3] = inquiry_vpd_83(&arr[4], port_group_id, 1964 target_dev_id, lu_id_num, 1965 lu_id_str, len, 1966 &devip->lu_name); 1967 } else if (0x84 == cmd[2]) { /* Software interface ident. */ 1968 arr[3] = inquiry_vpd_84(&arr[4]); 1969 } else if (0x85 == cmd[2]) { /* Management network addresses */ 1970 arr[3] = inquiry_vpd_85(&arr[4]); 1971 } else if (0x86 == cmd[2]) { /* extended inquiry */ 1972 arr[3] = 0x3c; /* number of following entries */ 1973 if (sdebug_dif == T10_PI_TYPE3_PROTECTION) 1974 arr[4] = 0x4; /* SPT: GRD_CHK:1 */ 1975 else if (have_dif_prot) 1976 arr[4] = 0x5; /* SPT: GRD_CHK:1, REF_CHK:1 */ 1977 else 1978 arr[4] = 0x0; /* no protection stuff */ 1979 /* 1980 * GROUP_SUP=1; HEADSUP=1 (HEAD OF QUEUE); ORDSUP=1 1981 * (ORDERED queuing); SIMPSUP=1 (SIMPLE queuing). 1982 */ 1983 arr[5] = 0x17; 1984 } else if (0x87 == cmd[2]) { /* mode page policy */ 1985 arr[3] = 0x8; /* number of following entries */ 1986 arr[4] = 0x2; /* disconnect-reconnect mp */ 1987 arr[6] = 0x80; /* mlus, shared */ 1988 arr[8] = 0x18; /* protocol specific lu */ 1989 arr[10] = 0x82; /* mlus, per initiator port */ 1990 } else if (0x88 == cmd[2]) { /* SCSI Ports */ 1991 arr[3] = inquiry_vpd_88(&arr[4], target_dev_id); 1992 } else if (is_disk_zbc && 0x89 == cmd[2]) { /* ATA info */ 1993 n = inquiry_vpd_89(&arr[4]); 1994 put_unaligned_be16(n, arr + 2); 1995 } else if (is_disk_zbc && 0xb0 == cmd[2]) { /* Block limits */ 1996 arr[3] = inquiry_vpd_b0(&arr[4]); 1997 } else if (is_disk_zbc && 0xb1 == cmd[2]) { /* Block char. */ 1998 arr[3] = inquiry_vpd_b1(devip, &arr[4]); 1999 } else if (is_disk && 0xb2 == cmd[2]) { /* LB Prov. */ 2000 arr[3] = inquiry_vpd_b2(&arr[4]); 2001 } else if (is_zbc && cmd[2] == 0xb6) { /* ZB dev. charact. */ 2002 arr[3] = inquiry_vpd_b6(devip, &arr[4]); 2003 } else if (cmd[2] == 0xb7) { /* block limits extension page */ 2004 arr[3] = inquiry_vpd_b7(&arr[4]); 2005 } else { 2006 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, -1); 2007 kfree(arr); 2008 return check_condition_result; 2009 } 2010 len = min_t(u32, get_unaligned_be16(arr + 2) + 4, alloc_len); 2011 ret = fill_from_dev_buffer(scp, arr, 2012 min_t(u32, len, SDEBUG_MAX_INQ_ARR_SZ)); 2013 kfree(arr); 2014 return ret; 2015 } 2016 /* drops through here for a standard inquiry */ 2017 arr[1] = sdebug_removable ? 0x80 : 0; /* Removable disk */ 2018 arr[2] = sdebug_scsi_level; 2019 arr[3] = 2; /* response_data_format==2 */ 2020 arr[4] = SDEBUG_LONG_INQ_SZ - 5; 2021 arr[5] = (int)have_dif_prot; /* PROTECT bit */ 2022 if (sdebug_vpd_use_hostno == 0) 2023 arr[5] |= 0x10; /* claim: implicit TPGS */ 2024 arr[6] = 0x10; /* claim: MultiP */ 2025 /* arr[6] |= 0x40; ... claim: EncServ (enclosure services) */ 2026 arr[7] = 0xa; /* claim: LINKED + CMDQUE */ 2027 memcpy(&arr[8], sdebug_inq_vendor_id, 8); 2028 memcpy(&arr[16], sdebug_inq_product_id, 16); 2029 memcpy(&arr[32], sdebug_inq_product_rev, 4); 2030 /* Use Vendor Specific area to place driver date in ASCII hex */ 2031 memcpy(&arr[36], sdebug_version_date, 8); 2032 /* version descriptors (2 bytes each) follow */ 2033 put_unaligned_be16(0xc0, arr + 58); /* SAM-6 no version claimed */ 2034 put_unaligned_be16(0x5c0, arr + 60); /* SPC-5 no version claimed */ 2035 n = 62; 2036 if (is_disk) { /* SBC-4 no version claimed */ 2037 put_unaligned_be16(0x600, arr + n); 2038 n += 2; 2039 } else if (sdebug_ptype == TYPE_TAPE) { /* SSC-4 rev 3 */ 2040 put_unaligned_be16(0x525, arr + n); 2041 n += 2; 2042 } else if (is_zbc) { /* ZBC BSR INCITS 536 revision 05 */ 2043 put_unaligned_be16(0x624, arr + n); 2044 n += 2; 2045 } 2046 put_unaligned_be16(0x2100, arr + n); /* SPL-4 no version claimed */ 2047 ret = fill_from_dev_buffer(scp, arr, 2048 min_t(u32, alloc_len, SDEBUG_LONG_INQ_SZ)); 2049 kfree(arr); 2050 return ret; 2051 } 2052 2053 /* See resp_iec_m_pg() for how this data is manipulated */ 2054 static unsigned char iec_m_pg[] = {0x1c, 0xa, 0x08, 0, 0, 0, 0, 0, 2055 0, 0, 0x0, 0x0}; 2056 2057 static int resp_requests(struct scsi_cmnd *scp, 2058 struct sdebug_dev_info *devip) 2059 { 2060 unsigned char *cmd = scp->cmnd; 2061 unsigned char arr[SCSI_SENSE_BUFFERSIZE]; /* assume >= 18 bytes */ 2062 bool dsense = !!(cmd[1] & 1); 2063 u32 alloc_len = cmd[4]; 2064 u32 len = 18; 2065 int stopped_state = atomic_read(&devip->stopped); 2066 2067 memset(arr, 0, sizeof(arr)); 2068 if (stopped_state > 0) { /* some "pollable" data [spc6r02: 5.12.2] */ 2069 if (dsense) { 2070 arr[0] = 0x72; 2071 arr[1] = NOT_READY; 2072 arr[2] = LOGICAL_UNIT_NOT_READY; 2073 arr[3] = (stopped_state == 2) ? 0x1 : 0x2; 2074 len = 8; 2075 } else { 2076 arr[0] = 0x70; 2077 arr[2] = NOT_READY; /* NO_SENSE in sense_key */ 2078 arr[7] = 0xa; /* 18 byte sense buffer */ 2079 arr[12] = LOGICAL_UNIT_NOT_READY; 2080 arr[13] = (stopped_state == 2) ? 0x1 : 0x2; 2081 } 2082 } else if ((iec_m_pg[2] & 0x4) && (6 == (iec_m_pg[3] & 0xf))) { 2083 /* Information exceptions control mode page: TEST=1, MRIE=6 */ 2084 if (dsense) { 2085 arr[0] = 0x72; 2086 arr[1] = 0x0; /* NO_SENSE in sense_key */ 2087 arr[2] = THRESHOLD_EXCEEDED; 2088 arr[3] = 0xff; /* Failure prediction(false) */ 2089 len = 8; 2090 } else { 2091 arr[0] = 0x70; 2092 arr[2] = 0x0; /* NO_SENSE in sense_key */ 2093 arr[7] = 0xa; /* 18 byte sense buffer */ 2094 arr[12] = THRESHOLD_EXCEEDED; 2095 arr[13] = 0xff; /* Failure prediction(false) */ 2096 } 2097 } else { /* nothing to report */ 2098 if (dsense) { 2099 len = 8; 2100 memset(arr, 0, len); 2101 arr[0] = 0x72; 2102 } else { 2103 memset(arr, 0, len); 2104 arr[0] = 0x70; 2105 arr[7] = 0xa; 2106 } 2107 } 2108 return fill_from_dev_buffer(scp, arr, min_t(u32, len, alloc_len)); 2109 } 2110 2111 static int resp_start_stop(struct scsi_cmnd *scp, struct sdebug_dev_info *devip) 2112 { 2113 unsigned char *cmd = scp->cmnd; 2114 int power_cond, want_stop, stopped_state; 2115 bool changing; 2116 2117 power_cond = (cmd[4] & 0xf0) >> 4; 2118 if (power_cond) { 2119 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 4, 7); 2120 return check_condition_result; 2121 } 2122 want_stop = !(cmd[4] & 1); 2123 stopped_state = atomic_read(&devip->stopped); 2124 if (stopped_state == 2) { 2125 ktime_t now_ts = ktime_get_boottime(); 2126 2127 if (ktime_to_ns(now_ts) > ktime_to_ns(devip->create_ts)) { 2128 u64 diff_ns = ktime_to_ns(ktime_sub(now_ts, devip->create_ts)); 2129 2130 if (diff_ns >= ((u64)sdeb_tur_ms_to_ready * 1000000)) { 2131 /* tur_ms_to_ready timer extinguished */ 2132 atomic_set(&devip->stopped, 0); 2133 stopped_state = 0; 2134 } 2135 } 2136 if (stopped_state == 2) { 2137 if (want_stop) { 2138 stopped_state = 1; /* dummy up success */ 2139 } else { /* Disallow tur_ms_to_ready delay to be overridden */ 2140 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 4, 0 /* START bit */); 2141 return check_condition_result; 2142 } 2143 } 2144 } 2145 changing = (stopped_state != want_stop); 2146 if (changing) 2147 atomic_xchg(&devip->stopped, want_stop); 2148 if (!changing || (cmd[1] & 0x1)) /* state unchanged or IMMED bit set in cdb */ 2149 return SDEG_RES_IMMED_MASK; 2150 else 2151 return 0; 2152 } 2153 2154 static sector_t get_sdebug_capacity(void) 2155 { 2156 static const unsigned int gibibyte = 1073741824; 2157 2158 if (sdebug_virtual_gb > 0) 2159 return (sector_t)sdebug_virtual_gb * 2160 (gibibyte / sdebug_sector_size); 2161 else 2162 return sdebug_store_sectors; 2163 } 2164 2165 #define SDEBUG_READCAP_ARR_SZ 8 2166 static int resp_readcap(struct scsi_cmnd *scp, 2167 struct sdebug_dev_info *devip) 2168 { 2169 unsigned char arr[SDEBUG_READCAP_ARR_SZ]; 2170 unsigned int capac; 2171 2172 /* following just in case virtual_gb changed */ 2173 sdebug_capacity = get_sdebug_capacity(); 2174 memset(arr, 0, SDEBUG_READCAP_ARR_SZ); 2175 if (sdebug_capacity < 0xffffffff) { 2176 capac = (unsigned int)sdebug_capacity - 1; 2177 put_unaligned_be32(capac, arr + 0); 2178 } else 2179 put_unaligned_be32(0xffffffff, arr + 0); 2180 put_unaligned_be16(sdebug_sector_size, arr + 6); 2181 return fill_from_dev_buffer(scp, arr, SDEBUG_READCAP_ARR_SZ); 2182 } 2183 2184 #define SDEBUG_READCAP16_ARR_SZ 32 2185 static int resp_readcap16(struct scsi_cmnd *scp, 2186 struct sdebug_dev_info *devip) 2187 { 2188 unsigned char *cmd = scp->cmnd; 2189 unsigned char arr[SDEBUG_READCAP16_ARR_SZ]; 2190 u32 alloc_len; 2191 2192 alloc_len = get_unaligned_be32(cmd + 10); 2193 /* following just in case virtual_gb changed */ 2194 sdebug_capacity = get_sdebug_capacity(); 2195 memset(arr, 0, SDEBUG_READCAP16_ARR_SZ); 2196 put_unaligned_be64((u64)(sdebug_capacity - 1), arr + 0); 2197 put_unaligned_be32(sdebug_sector_size, arr + 8); 2198 arr[13] = sdebug_physblk_exp & 0xf; 2199 arr[14] = (sdebug_lowest_aligned >> 8) & 0x3f; 2200 2201 if (scsi_debug_lbp()) { 2202 arr[14] |= 0x80; /* LBPME */ 2203 /* from sbc4r07, this LBPRZ field is 1 bit, but the LBPRZ in 2204 * the LB Provisioning VPD page is 3 bits. Note that lbprz=2 2205 * in the wider field maps to 0 in this field. 2206 */ 2207 if (sdebug_lbprz & 1) /* precisely what the draft requires */ 2208 arr[14] |= 0x40; 2209 } 2210 2211 /* 2212 * Since the scsi_debug READ CAPACITY implementation always reports the 2213 * total disk capacity, set RC BASIS = 1 for host-managed ZBC devices. 2214 */ 2215 if (devip->zoned) 2216 arr[12] |= 1 << 4; 2217 2218 arr[15] = sdebug_lowest_aligned & 0xff; 2219 2220 if (have_dif_prot) { 2221 arr[12] = (sdebug_dif - 1) << 1; /* P_TYPE */ 2222 arr[12] |= 1; /* PROT_EN */ 2223 } 2224 2225 return fill_from_dev_buffer(scp, arr, 2226 min_t(u32, alloc_len, SDEBUG_READCAP16_ARR_SZ)); 2227 } 2228 2229 #define SDEBUG_MAX_TGTPGS_ARR_SZ 1412 2230 2231 static int resp_report_tgtpgs(struct scsi_cmnd *scp, 2232 struct sdebug_dev_info *devip) 2233 { 2234 unsigned char *cmd = scp->cmnd; 2235 unsigned char *arr; 2236 int host_no = devip->sdbg_host->shost->host_no; 2237 int port_group_a, port_group_b, port_a, port_b; 2238 u32 alen, n, rlen; 2239 int ret; 2240 2241 alen = get_unaligned_be32(cmd + 6); 2242 arr = kzalloc(SDEBUG_MAX_TGTPGS_ARR_SZ, GFP_ATOMIC); 2243 if (! arr) 2244 return DID_REQUEUE << 16; 2245 /* 2246 * EVPD page 0x88 states we have two ports, one 2247 * real and a fake port with no device connected. 2248 * So we create two port groups with one port each 2249 * and set the group with port B to unavailable. 2250 */ 2251 port_a = 0x1; /* relative port A */ 2252 port_b = 0x2; /* relative port B */ 2253 port_group_a = (((host_no + 1) & 0x7f) << 8) + 2254 (devip->channel & 0x7f); 2255 port_group_b = (((host_no + 1) & 0x7f) << 8) + 2256 (devip->channel & 0x7f) + 0x80; 2257 2258 /* 2259 * The asymmetric access state is cycled according to the host_id. 2260 */ 2261 n = 4; 2262 if (sdebug_vpd_use_hostno == 0) { 2263 arr[n++] = host_no % 3; /* Asymm access state */ 2264 arr[n++] = 0x0F; /* claim: all states are supported */ 2265 } else { 2266 arr[n++] = 0x0; /* Active/Optimized path */ 2267 arr[n++] = 0x01; /* only support active/optimized paths */ 2268 } 2269 put_unaligned_be16(port_group_a, arr + n); 2270 n += 2; 2271 arr[n++] = 0; /* Reserved */ 2272 arr[n++] = 0; /* Status code */ 2273 arr[n++] = 0; /* Vendor unique */ 2274 arr[n++] = 0x1; /* One port per group */ 2275 arr[n++] = 0; /* Reserved */ 2276 arr[n++] = 0; /* Reserved */ 2277 put_unaligned_be16(port_a, arr + n); 2278 n += 2; 2279 arr[n++] = 3; /* Port unavailable */ 2280 arr[n++] = 0x08; /* claim: only unavailalbe paths are supported */ 2281 put_unaligned_be16(port_group_b, arr + n); 2282 n += 2; 2283 arr[n++] = 0; /* Reserved */ 2284 arr[n++] = 0; /* Status code */ 2285 arr[n++] = 0; /* Vendor unique */ 2286 arr[n++] = 0x1; /* One port per group */ 2287 arr[n++] = 0; /* Reserved */ 2288 arr[n++] = 0; /* Reserved */ 2289 put_unaligned_be16(port_b, arr + n); 2290 n += 2; 2291 2292 rlen = n - 4; 2293 put_unaligned_be32(rlen, arr + 0); 2294 2295 /* 2296 * Return the smallest value of either 2297 * - The allocated length 2298 * - The constructed command length 2299 * - The maximum array size 2300 */ 2301 rlen = min(alen, n); 2302 ret = fill_from_dev_buffer(scp, arr, 2303 min_t(u32, rlen, SDEBUG_MAX_TGTPGS_ARR_SZ)); 2304 kfree(arr); 2305 return ret; 2306 } 2307 2308 static int resp_rsup_opcodes(struct scsi_cmnd *scp, 2309 struct sdebug_dev_info *devip) 2310 { 2311 bool rctd; 2312 u8 reporting_opts, req_opcode, sdeb_i, supp; 2313 u16 req_sa, u; 2314 u32 alloc_len, a_len; 2315 int k, offset, len, errsts, count, bump, na; 2316 const struct opcode_info_t *oip; 2317 const struct opcode_info_t *r_oip; 2318 u8 *arr; 2319 u8 *cmd = scp->cmnd; 2320 2321 rctd = !!(cmd[2] & 0x80); 2322 reporting_opts = cmd[2] & 0x7; 2323 req_opcode = cmd[3]; 2324 req_sa = get_unaligned_be16(cmd + 4); 2325 alloc_len = get_unaligned_be32(cmd + 6); 2326 if (alloc_len < 4 || alloc_len > 0xffff) { 2327 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 6, -1); 2328 return check_condition_result; 2329 } 2330 if (alloc_len > 8192) 2331 a_len = 8192; 2332 else 2333 a_len = alloc_len; 2334 arr = kzalloc((a_len < 256) ? 320 : a_len + 64, GFP_ATOMIC); 2335 if (NULL == arr) { 2336 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC, 2337 INSUFF_RES_ASCQ); 2338 return check_condition_result; 2339 } 2340 switch (reporting_opts) { 2341 case 0: /* all commands */ 2342 /* count number of commands */ 2343 for (count = 0, oip = opcode_info_arr; 2344 oip->num_attached != 0xff; ++oip) { 2345 if (F_INV_OP & oip->flags) 2346 continue; 2347 count += (oip->num_attached + 1); 2348 } 2349 bump = rctd ? 20 : 8; 2350 put_unaligned_be32(count * bump, arr); 2351 for (offset = 4, oip = opcode_info_arr; 2352 oip->num_attached != 0xff && offset < a_len; ++oip) { 2353 if (F_INV_OP & oip->flags) 2354 continue; 2355 na = oip->num_attached; 2356 arr[offset] = oip->opcode; 2357 put_unaligned_be16(oip->sa, arr + offset + 2); 2358 if (rctd) 2359 arr[offset + 5] |= 0x2; 2360 if (FF_SA & oip->flags) 2361 arr[offset + 5] |= 0x1; 2362 put_unaligned_be16(oip->len_mask[0], arr + offset + 6); 2363 if (rctd) 2364 put_unaligned_be16(0xa, arr + offset + 8); 2365 r_oip = oip; 2366 for (k = 0, oip = oip->arrp; k < na; ++k, ++oip) { 2367 if (F_INV_OP & oip->flags) 2368 continue; 2369 offset += bump; 2370 arr[offset] = oip->opcode; 2371 put_unaligned_be16(oip->sa, arr + offset + 2); 2372 if (rctd) 2373 arr[offset + 5] |= 0x2; 2374 if (FF_SA & oip->flags) 2375 arr[offset + 5] |= 0x1; 2376 put_unaligned_be16(oip->len_mask[0], 2377 arr + offset + 6); 2378 if (rctd) 2379 put_unaligned_be16(0xa, 2380 arr + offset + 8); 2381 } 2382 oip = r_oip; 2383 offset += bump; 2384 } 2385 break; 2386 case 1: /* one command: opcode only */ 2387 case 2: /* one command: opcode plus service action */ 2388 case 3: /* one command: if sa==0 then opcode only else opcode+sa */ 2389 sdeb_i = opcode_ind_arr[req_opcode]; 2390 oip = &opcode_info_arr[sdeb_i]; 2391 if (F_INV_OP & oip->flags) { 2392 supp = 1; 2393 offset = 4; 2394 } else { 2395 if (1 == reporting_opts) { 2396 if (FF_SA & oip->flags) { 2397 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2398 2, 2); 2399 kfree(arr); 2400 return check_condition_result; 2401 } 2402 req_sa = 0; 2403 } else if (2 == reporting_opts && 2404 0 == (FF_SA & oip->flags)) { 2405 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 4, -1); 2406 kfree(arr); /* point at requested sa */ 2407 return check_condition_result; 2408 } 2409 if (0 == (FF_SA & oip->flags) && 2410 req_opcode == oip->opcode) 2411 supp = 3; 2412 else if (0 == (FF_SA & oip->flags)) { 2413 na = oip->num_attached; 2414 for (k = 0, oip = oip->arrp; k < na; 2415 ++k, ++oip) { 2416 if (req_opcode == oip->opcode) 2417 break; 2418 } 2419 supp = (k >= na) ? 1 : 3; 2420 } else if (req_sa != oip->sa) { 2421 na = oip->num_attached; 2422 for (k = 0, oip = oip->arrp; k < na; 2423 ++k, ++oip) { 2424 if (req_sa == oip->sa) 2425 break; 2426 } 2427 supp = (k >= na) ? 1 : 3; 2428 } else 2429 supp = 3; 2430 if (3 == supp) { 2431 u = oip->len_mask[0]; 2432 put_unaligned_be16(u, arr + 2); 2433 arr[4] = oip->opcode; 2434 for (k = 1; k < u; ++k) 2435 arr[4 + k] = (k < 16) ? 2436 oip->len_mask[k] : 0xff; 2437 offset = 4 + u; 2438 } else 2439 offset = 4; 2440 } 2441 arr[1] = (rctd ? 0x80 : 0) | supp; 2442 if (rctd) { 2443 put_unaligned_be16(0xa, arr + offset); 2444 offset += 12; 2445 } 2446 break; 2447 default: 2448 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 2); 2449 kfree(arr); 2450 return check_condition_result; 2451 } 2452 offset = (offset < a_len) ? offset : a_len; 2453 len = (offset < alloc_len) ? offset : alloc_len; 2454 errsts = fill_from_dev_buffer(scp, arr, len); 2455 kfree(arr); 2456 return errsts; 2457 } 2458 2459 static int resp_rsup_tmfs(struct scsi_cmnd *scp, 2460 struct sdebug_dev_info *devip) 2461 { 2462 bool repd; 2463 u32 alloc_len, len; 2464 u8 arr[16]; 2465 u8 *cmd = scp->cmnd; 2466 2467 memset(arr, 0, sizeof(arr)); 2468 repd = !!(cmd[2] & 0x80); 2469 alloc_len = get_unaligned_be32(cmd + 6); 2470 if (alloc_len < 4) { 2471 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 6, -1); 2472 return check_condition_result; 2473 } 2474 arr[0] = 0xc8; /* ATS | ATSS | LURS */ 2475 arr[1] = 0x1; /* ITNRS */ 2476 if (repd) { 2477 arr[3] = 0xc; 2478 len = 16; 2479 } else 2480 len = 4; 2481 2482 len = (len < alloc_len) ? len : alloc_len; 2483 return fill_from_dev_buffer(scp, arr, len); 2484 } 2485 2486 /* <<Following mode page info copied from ST318451LW>> */ 2487 2488 static int resp_err_recov_pg(unsigned char *p, int pcontrol, int target) 2489 { /* Read-Write Error Recovery page for mode_sense */ 2490 unsigned char err_recov_pg[] = {0x1, 0xa, 0xc0, 11, 240, 0, 0, 0, 2491 5, 0, 0xff, 0xff}; 2492 2493 memcpy(p, err_recov_pg, sizeof(err_recov_pg)); 2494 if (1 == pcontrol) 2495 memset(p + 2, 0, sizeof(err_recov_pg) - 2); 2496 return sizeof(err_recov_pg); 2497 } 2498 2499 static int resp_disconnect_pg(unsigned char *p, int pcontrol, int target) 2500 { /* Disconnect-Reconnect page for mode_sense */ 2501 unsigned char disconnect_pg[] = {0x2, 0xe, 128, 128, 0, 10, 0, 0, 2502 0, 0, 0, 0, 0, 0, 0, 0}; 2503 2504 memcpy(p, disconnect_pg, sizeof(disconnect_pg)); 2505 if (1 == pcontrol) 2506 memset(p + 2, 0, sizeof(disconnect_pg) - 2); 2507 return sizeof(disconnect_pg); 2508 } 2509 2510 static int resp_format_pg(unsigned char *p, int pcontrol, int target) 2511 { /* Format device page for mode_sense */ 2512 unsigned char format_pg[] = {0x3, 0x16, 0, 0, 0, 0, 0, 0, 2513 0, 0, 0, 0, 0, 0, 0, 0, 2514 0, 0, 0, 0, 0x40, 0, 0, 0}; 2515 2516 memcpy(p, format_pg, sizeof(format_pg)); 2517 put_unaligned_be16(sdebug_sectors_per, p + 10); 2518 put_unaligned_be16(sdebug_sector_size, p + 12); 2519 if (sdebug_removable) 2520 p[20] |= 0x20; /* should agree with INQUIRY */ 2521 if (1 == pcontrol) 2522 memset(p + 2, 0, sizeof(format_pg) - 2); 2523 return sizeof(format_pg); 2524 } 2525 2526 static unsigned char caching_pg[] = {0x8, 18, 0x14, 0, 0xff, 0xff, 0, 0, 2527 0xff, 0xff, 0xff, 0xff, 0x80, 0x14, 0, 0, 2528 0, 0, 0, 0}; 2529 2530 static int resp_caching_pg(unsigned char *p, int pcontrol, int target) 2531 { /* Caching page for mode_sense */ 2532 unsigned char ch_caching_pg[] = {/* 0x8, 18, */ 0x4, 0, 0, 0, 0, 0, 2533 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}; 2534 unsigned char d_caching_pg[] = {0x8, 18, 0x14, 0, 0xff, 0xff, 0, 0, 2535 0xff, 0xff, 0xff, 0xff, 0x80, 0x14, 0, 0, 0, 0, 0, 0}; 2536 2537 if (SDEBUG_OPT_N_WCE & sdebug_opts) 2538 caching_pg[2] &= ~0x4; /* set WCE=0 (default WCE=1) */ 2539 memcpy(p, caching_pg, sizeof(caching_pg)); 2540 if (1 == pcontrol) 2541 memcpy(p + 2, ch_caching_pg, sizeof(ch_caching_pg)); 2542 else if (2 == pcontrol) 2543 memcpy(p, d_caching_pg, sizeof(d_caching_pg)); 2544 return sizeof(caching_pg); 2545 } 2546 2547 static unsigned char ctrl_m_pg[] = {0xa, 10, 2, 0, 0, 0, 0, 0, 2548 0, 0, 0x2, 0x4b}; 2549 2550 static int resp_ctrl_m_pg(unsigned char *p, int pcontrol, int target) 2551 { /* Control mode page for mode_sense */ 2552 unsigned char ch_ctrl_m_pg[] = {/* 0xa, 10, */ 0x6, 0, 0, 0, 0, 0, 2553 0, 0, 0, 0}; 2554 unsigned char d_ctrl_m_pg[] = {0xa, 10, 2, 0, 0, 0, 0, 0, 2555 0, 0, 0x2, 0x4b}; 2556 2557 if (sdebug_dsense) 2558 ctrl_m_pg[2] |= 0x4; 2559 else 2560 ctrl_m_pg[2] &= ~0x4; 2561 2562 if (sdebug_ato) 2563 ctrl_m_pg[5] |= 0x80; /* ATO=1 */ 2564 2565 memcpy(p, ctrl_m_pg, sizeof(ctrl_m_pg)); 2566 if (1 == pcontrol) 2567 memcpy(p + 2, ch_ctrl_m_pg, sizeof(ch_ctrl_m_pg)); 2568 else if (2 == pcontrol) 2569 memcpy(p, d_ctrl_m_pg, sizeof(d_ctrl_m_pg)); 2570 return sizeof(ctrl_m_pg); 2571 } 2572 2573 /* IO Advice Hints Grouping mode page */ 2574 static int resp_grouping_m_pg(unsigned char *p, int pcontrol, int target) 2575 { 2576 /* IO Advice Hints Grouping mode page */ 2577 struct grouping_m_pg { 2578 u8 page_code; /* OR 0x40 when subpage_code > 0 */ 2579 u8 subpage_code; 2580 __be16 page_length; 2581 u8 reserved[12]; 2582 struct scsi_io_group_descriptor descr[MAXIMUM_NUMBER_OF_STREAMS]; 2583 }; 2584 static const struct grouping_m_pg gr_m_pg = { 2585 .page_code = 0xa | 0x40, 2586 .subpage_code = 5, 2587 .page_length = cpu_to_be16(sizeof(gr_m_pg) - 4), 2588 .descr = { 2589 { .st_enble = 1 }, 2590 { .st_enble = 1 }, 2591 { .st_enble = 1 }, 2592 { .st_enble = 1 }, 2593 { .st_enble = 1 }, 2594 { .st_enble = 0 }, 2595 } 2596 }; 2597 2598 BUILD_BUG_ON(sizeof(struct grouping_m_pg) != 2599 16 + MAXIMUM_NUMBER_OF_STREAMS * 16); 2600 memcpy(p, &gr_m_pg, sizeof(gr_m_pg)); 2601 if (1 == pcontrol) { 2602 /* There are no changeable values so clear from byte 4 on. */ 2603 memset(p + 4, 0, sizeof(gr_m_pg) - 4); 2604 } 2605 return sizeof(gr_m_pg); 2606 } 2607 2608 static int resp_iec_m_pg(unsigned char *p, int pcontrol, int target) 2609 { /* Informational Exceptions control mode page for mode_sense */ 2610 unsigned char ch_iec_m_pg[] = {/* 0x1c, 0xa, */ 0x4, 0xf, 0, 0, 0, 0, 2611 0, 0, 0x0, 0x0}; 2612 unsigned char d_iec_m_pg[] = {0x1c, 0xa, 0x08, 0, 0, 0, 0, 0, 2613 0, 0, 0x0, 0x0}; 2614 2615 memcpy(p, iec_m_pg, sizeof(iec_m_pg)); 2616 if (1 == pcontrol) 2617 memcpy(p + 2, ch_iec_m_pg, sizeof(ch_iec_m_pg)); 2618 else if (2 == pcontrol) 2619 memcpy(p, d_iec_m_pg, sizeof(d_iec_m_pg)); 2620 return sizeof(iec_m_pg); 2621 } 2622 2623 static int resp_sas_sf_m_pg(unsigned char *p, int pcontrol, int target) 2624 { /* SAS SSP mode page - short format for mode_sense */ 2625 unsigned char sas_sf_m_pg[] = {0x19, 0x6, 2626 0x6, 0x0, 0x7, 0xd0, 0x0, 0x0}; 2627 2628 memcpy(p, sas_sf_m_pg, sizeof(sas_sf_m_pg)); 2629 if (1 == pcontrol) 2630 memset(p + 2, 0, sizeof(sas_sf_m_pg) - 2); 2631 return sizeof(sas_sf_m_pg); 2632 } 2633 2634 2635 static int resp_sas_pcd_m_spg(unsigned char *p, int pcontrol, int target, 2636 int target_dev_id) 2637 { /* SAS phy control and discover mode page for mode_sense */ 2638 unsigned char sas_pcd_m_pg[] = {0x59, 0x1, 0, 0x64, 0, 0x6, 0, 2, 2639 0, 0, 0, 0, 0x10, 0x9, 0x8, 0x0, 2640 0, 0, 0, 0, 0, 0, 0, 0, /* insert SAS addr */ 2641 0, 0, 0, 0, 0, 0, 0, 0, /* insert SAS addr */ 2642 0x2, 0, 0, 0, 0, 0, 0, 0, 2643 0x88, 0x99, 0, 0, 0, 0, 0, 0, 2644 0, 0, 0, 0, 0, 0, 0, 0, 2645 0, 1, 0, 0, 0x10, 0x9, 0x8, 0x0, 2646 0, 0, 0, 0, 0, 0, 0, 0, /* insert SAS addr */ 2647 0, 0, 0, 0, 0, 0, 0, 0, /* insert SAS addr */ 2648 0x3, 0, 0, 0, 0, 0, 0, 0, 2649 0x88, 0x99, 0, 0, 0, 0, 0, 0, 2650 0, 0, 0, 0, 0, 0, 0, 0, 2651 }; 2652 int port_a, port_b; 2653 2654 put_unaligned_be64(naa3_comp_a, sas_pcd_m_pg + 16); 2655 put_unaligned_be64(naa3_comp_c + 1, sas_pcd_m_pg + 24); 2656 put_unaligned_be64(naa3_comp_a, sas_pcd_m_pg + 64); 2657 put_unaligned_be64(naa3_comp_c + 1, sas_pcd_m_pg + 72); 2658 port_a = target_dev_id + 1; 2659 port_b = port_a + 1; 2660 memcpy(p, sas_pcd_m_pg, sizeof(sas_pcd_m_pg)); 2661 put_unaligned_be32(port_a, p + 20); 2662 put_unaligned_be32(port_b, p + 48 + 20); 2663 if (1 == pcontrol) 2664 memset(p + 4, 0, sizeof(sas_pcd_m_pg) - 4); 2665 return sizeof(sas_pcd_m_pg); 2666 } 2667 2668 static int resp_sas_sha_m_spg(unsigned char *p, int pcontrol) 2669 { /* SAS SSP shared protocol specific port mode subpage */ 2670 unsigned char sas_sha_m_pg[] = {0x59, 0x2, 0, 0xc, 0, 0x6, 0x10, 0, 2671 0, 0, 0, 0, 0, 0, 0, 0, 2672 }; 2673 2674 memcpy(p, sas_sha_m_pg, sizeof(sas_sha_m_pg)); 2675 if (1 == pcontrol) 2676 memset(p + 4, 0, sizeof(sas_sha_m_pg) - 4); 2677 return sizeof(sas_sha_m_pg); 2678 } 2679 2680 /* PAGE_SIZE is more than necessary but provides room for future expansion. */ 2681 #define SDEBUG_MAX_MSENSE_SZ PAGE_SIZE 2682 2683 static int resp_mode_sense(struct scsi_cmnd *scp, 2684 struct sdebug_dev_info *devip) 2685 { 2686 int pcontrol, pcode, subpcode, bd_len; 2687 unsigned char dev_spec; 2688 u32 alloc_len, offset, len; 2689 int target_dev_id; 2690 int target = scp->device->id; 2691 unsigned char *ap; 2692 unsigned char *arr __free(kfree); 2693 unsigned char *cmd = scp->cmnd; 2694 bool dbd, llbaa, msense_6, is_disk, is_zbc; 2695 2696 arr = kzalloc(SDEBUG_MAX_MSENSE_SZ, GFP_ATOMIC); 2697 if (!arr) 2698 return -ENOMEM; 2699 dbd = !!(cmd[1] & 0x8); /* disable block descriptors */ 2700 pcontrol = (cmd[2] & 0xc0) >> 6; 2701 pcode = cmd[2] & 0x3f; 2702 subpcode = cmd[3]; 2703 msense_6 = (MODE_SENSE == cmd[0]); 2704 llbaa = msense_6 ? false : !!(cmd[1] & 0x10); 2705 is_disk = (sdebug_ptype == TYPE_DISK); 2706 is_zbc = devip->zoned; 2707 if ((is_disk || is_zbc) && !dbd) 2708 bd_len = llbaa ? 16 : 8; 2709 else 2710 bd_len = 0; 2711 alloc_len = msense_6 ? cmd[4] : get_unaligned_be16(cmd + 7); 2712 memset(arr, 0, SDEBUG_MAX_MSENSE_SZ); 2713 if (0x3 == pcontrol) { /* Saving values not supported */ 2714 mk_sense_buffer(scp, ILLEGAL_REQUEST, SAVING_PARAMS_UNSUP, 0); 2715 return check_condition_result; 2716 } 2717 target_dev_id = ((devip->sdbg_host->shost->host_no + 1) * 2000) + 2718 (devip->target * 1000) - 3; 2719 /* for disks+zbc set DPOFUA bit and clear write protect (WP) bit */ 2720 if (is_disk || is_zbc) { 2721 dev_spec = 0x10; /* =0x90 if WP=1 implies read-only */ 2722 if (sdebug_wp) 2723 dev_spec |= 0x80; 2724 } else 2725 dev_spec = 0x0; 2726 if (msense_6) { 2727 arr[2] = dev_spec; 2728 arr[3] = bd_len; 2729 offset = 4; 2730 } else { 2731 arr[3] = dev_spec; 2732 if (16 == bd_len) 2733 arr[4] = 0x1; /* set LONGLBA bit */ 2734 arr[7] = bd_len; /* assume 255 or less */ 2735 offset = 8; 2736 } 2737 ap = arr + offset; 2738 if ((bd_len > 0) && (!sdebug_capacity)) 2739 sdebug_capacity = get_sdebug_capacity(); 2740 2741 if (8 == bd_len) { 2742 if (sdebug_capacity > 0xfffffffe) 2743 put_unaligned_be32(0xffffffff, ap + 0); 2744 else 2745 put_unaligned_be32(sdebug_capacity, ap + 0); 2746 put_unaligned_be16(sdebug_sector_size, ap + 6); 2747 offset += bd_len; 2748 ap = arr + offset; 2749 } else if (16 == bd_len) { 2750 put_unaligned_be64((u64)sdebug_capacity, ap + 0); 2751 put_unaligned_be32(sdebug_sector_size, ap + 12); 2752 offset += bd_len; 2753 ap = arr + offset; 2754 } 2755 2756 /* 2757 * N.B. If len>0 before resp_*_pg() call, then form of that call should be: 2758 * len += resp_*_pg(ap + len, pcontrol, target); 2759 */ 2760 switch (pcode) { 2761 case 0x1: /* Read-Write error recovery page, direct access */ 2762 if (subpcode > 0x0 && subpcode < 0xff) 2763 goto bad_subpcode; 2764 len = resp_err_recov_pg(ap, pcontrol, target); 2765 offset += len; 2766 break; 2767 case 0x2: /* Disconnect-Reconnect page, all devices */ 2768 if (subpcode > 0x0 && subpcode < 0xff) 2769 goto bad_subpcode; 2770 len = resp_disconnect_pg(ap, pcontrol, target); 2771 offset += len; 2772 break; 2773 case 0x3: /* Format device page, direct access */ 2774 if (subpcode > 0x0 && subpcode < 0xff) 2775 goto bad_subpcode; 2776 if (is_disk) { 2777 len = resp_format_pg(ap, pcontrol, target); 2778 offset += len; 2779 } else { 2780 goto bad_pcode; 2781 } 2782 break; 2783 case 0x8: /* Caching page, direct access */ 2784 if (subpcode > 0x0 && subpcode < 0xff) 2785 goto bad_subpcode; 2786 if (is_disk || is_zbc) { 2787 len = resp_caching_pg(ap, pcontrol, target); 2788 offset += len; 2789 } else { 2790 goto bad_pcode; 2791 } 2792 break; 2793 case 0xa: /* Control Mode page, all devices */ 2794 switch (subpcode) { 2795 case 0: 2796 len = resp_ctrl_m_pg(ap, pcontrol, target); 2797 break; 2798 case 0x05: 2799 len = resp_grouping_m_pg(ap, pcontrol, target); 2800 break; 2801 case 0xff: 2802 len = resp_ctrl_m_pg(ap, pcontrol, target); 2803 len += resp_grouping_m_pg(ap + len, pcontrol, target); 2804 break; 2805 default: 2806 goto bad_subpcode; 2807 } 2808 offset += len; 2809 break; 2810 case 0x19: /* if spc==1 then sas phy, control+discover */ 2811 if (subpcode > 0x2 && subpcode < 0xff) 2812 goto bad_subpcode; 2813 len = 0; 2814 if ((0x0 == subpcode) || (0xff == subpcode)) 2815 len += resp_sas_sf_m_pg(ap + len, pcontrol, target); 2816 if ((0x1 == subpcode) || (0xff == subpcode)) 2817 len += resp_sas_pcd_m_spg(ap + len, pcontrol, target, 2818 target_dev_id); 2819 if ((0x2 == subpcode) || (0xff == subpcode)) 2820 len += resp_sas_sha_m_spg(ap + len, pcontrol); 2821 offset += len; 2822 break; 2823 case 0x1c: /* Informational Exceptions Mode page, all devices */ 2824 if (subpcode > 0x0 && subpcode < 0xff) 2825 goto bad_subpcode; 2826 len = resp_iec_m_pg(ap, pcontrol, target); 2827 offset += len; 2828 break; 2829 case 0x3f: /* Read all Mode pages */ 2830 if (subpcode > 0x0 && subpcode < 0xff) 2831 goto bad_subpcode; 2832 len = resp_err_recov_pg(ap, pcontrol, target); 2833 len += resp_disconnect_pg(ap + len, pcontrol, target); 2834 if (is_disk) { 2835 len += resp_format_pg(ap + len, pcontrol, target); 2836 len += resp_caching_pg(ap + len, pcontrol, target); 2837 } else if (is_zbc) { 2838 len += resp_caching_pg(ap + len, pcontrol, target); 2839 } 2840 len += resp_ctrl_m_pg(ap + len, pcontrol, target); 2841 if (0xff == subpcode) 2842 len += resp_grouping_m_pg(ap + len, pcontrol, target); 2843 len += resp_sas_sf_m_pg(ap + len, pcontrol, target); 2844 if (0xff == subpcode) { 2845 len += resp_sas_pcd_m_spg(ap + len, pcontrol, target, 2846 target_dev_id); 2847 len += resp_sas_sha_m_spg(ap + len, pcontrol); 2848 } 2849 len += resp_iec_m_pg(ap + len, pcontrol, target); 2850 offset += len; 2851 break; 2852 default: 2853 goto bad_pcode; 2854 } 2855 if (msense_6) 2856 arr[0] = offset - 1; 2857 else 2858 put_unaligned_be16((offset - 2), arr + 0); 2859 return fill_from_dev_buffer(scp, arr, min_t(u32, alloc_len, offset)); 2860 2861 bad_pcode: 2862 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 5); 2863 return check_condition_result; 2864 2865 bad_subpcode: 2866 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1); 2867 return check_condition_result; 2868 } 2869 2870 #define SDEBUG_MAX_MSELECT_SZ 512 2871 2872 static int resp_mode_select(struct scsi_cmnd *scp, 2873 struct sdebug_dev_info *devip) 2874 { 2875 int pf, sp, ps, md_len, bd_len, off, spf, pg_len; 2876 int param_len, res, mpage; 2877 unsigned char arr[SDEBUG_MAX_MSELECT_SZ]; 2878 unsigned char *cmd = scp->cmnd; 2879 int mselect6 = (MODE_SELECT == cmd[0]); 2880 2881 memset(arr, 0, sizeof(arr)); 2882 pf = cmd[1] & 0x10; 2883 sp = cmd[1] & 0x1; 2884 param_len = mselect6 ? cmd[4] : get_unaligned_be16(cmd + 7); 2885 if ((0 == pf) || sp || (param_len > SDEBUG_MAX_MSELECT_SZ)) { 2886 mk_sense_invalid_fld(scp, SDEB_IN_CDB, mselect6 ? 4 : 7, -1); 2887 return check_condition_result; 2888 } 2889 res = fetch_to_dev_buffer(scp, arr, param_len); 2890 if (-1 == res) 2891 return DID_ERROR << 16; 2892 else if (sdebug_verbose && (res < param_len)) 2893 sdev_printk(KERN_INFO, scp->device, 2894 "%s: cdb indicated=%d, IO sent=%d bytes\n", 2895 __func__, param_len, res); 2896 md_len = mselect6 ? (arr[0] + 1) : (get_unaligned_be16(arr + 0) + 2); 2897 bd_len = mselect6 ? arr[3] : get_unaligned_be16(arr + 6); 2898 off = bd_len + (mselect6 ? 4 : 8); 2899 if (md_len > 2 || off >= res) { 2900 mk_sense_invalid_fld(scp, SDEB_IN_DATA, 0, -1); 2901 return check_condition_result; 2902 } 2903 mpage = arr[off] & 0x3f; 2904 ps = !!(arr[off] & 0x80); 2905 if (ps) { 2906 mk_sense_invalid_fld(scp, SDEB_IN_DATA, off, 7); 2907 return check_condition_result; 2908 } 2909 spf = !!(arr[off] & 0x40); 2910 pg_len = spf ? (get_unaligned_be16(arr + off + 2) + 4) : 2911 (arr[off + 1] + 2); 2912 if ((pg_len + off) > param_len) { 2913 mk_sense_buffer(scp, ILLEGAL_REQUEST, 2914 PARAMETER_LIST_LENGTH_ERR, 0); 2915 return check_condition_result; 2916 } 2917 switch (mpage) { 2918 case 0x8: /* Caching Mode page */ 2919 if (caching_pg[1] == arr[off + 1]) { 2920 memcpy(caching_pg + 2, arr + off + 2, 2921 sizeof(caching_pg) - 2); 2922 goto set_mode_changed_ua; 2923 } 2924 break; 2925 case 0xa: /* Control Mode page */ 2926 if (ctrl_m_pg[1] == arr[off + 1]) { 2927 memcpy(ctrl_m_pg + 2, arr + off + 2, 2928 sizeof(ctrl_m_pg) - 2); 2929 if (ctrl_m_pg[4] & 0x8) 2930 sdebug_wp = true; 2931 else 2932 sdebug_wp = false; 2933 sdebug_dsense = !!(ctrl_m_pg[2] & 0x4); 2934 goto set_mode_changed_ua; 2935 } 2936 break; 2937 case 0x1c: /* Informational Exceptions Mode page */ 2938 if (iec_m_pg[1] == arr[off + 1]) { 2939 memcpy(iec_m_pg + 2, arr + off + 2, 2940 sizeof(iec_m_pg) - 2); 2941 goto set_mode_changed_ua; 2942 } 2943 break; 2944 default: 2945 break; 2946 } 2947 mk_sense_invalid_fld(scp, SDEB_IN_DATA, off, 5); 2948 return check_condition_result; 2949 set_mode_changed_ua: 2950 set_bit(SDEBUG_UA_MODE_CHANGED, devip->uas_bm); 2951 return 0; 2952 } 2953 2954 static int resp_temp_l_pg(unsigned char *arr) 2955 { 2956 unsigned char temp_l_pg[] = {0x0, 0x0, 0x3, 0x2, 0x0, 38, 2957 0x0, 0x1, 0x3, 0x2, 0x0, 65, 2958 }; 2959 2960 memcpy(arr, temp_l_pg, sizeof(temp_l_pg)); 2961 return sizeof(temp_l_pg); 2962 } 2963 2964 static int resp_ie_l_pg(unsigned char *arr) 2965 { 2966 unsigned char ie_l_pg[] = {0x0, 0x0, 0x3, 0x3, 0x0, 0x0, 38, 2967 }; 2968 2969 memcpy(arr, ie_l_pg, sizeof(ie_l_pg)); 2970 if (iec_m_pg[2] & 0x4) { /* TEST bit set */ 2971 arr[4] = THRESHOLD_EXCEEDED; 2972 arr[5] = 0xff; 2973 } 2974 return sizeof(ie_l_pg); 2975 } 2976 2977 static int resp_env_rep_l_spg(unsigned char *arr) 2978 { 2979 unsigned char env_rep_l_spg[] = {0x0, 0x0, 0x23, 0x8, 2980 0x0, 40, 72, 0xff, 45, 18, 0, 0, 2981 0x1, 0x0, 0x23, 0x8, 2982 0x0, 55, 72, 35, 55, 45, 0, 0, 2983 }; 2984 2985 memcpy(arr, env_rep_l_spg, sizeof(env_rep_l_spg)); 2986 return sizeof(env_rep_l_spg); 2987 } 2988 2989 #define SDEBUG_MAX_LSENSE_SZ 512 2990 2991 static int resp_log_sense(struct scsi_cmnd *scp, 2992 struct sdebug_dev_info *devip) 2993 { 2994 int ppc, sp, pcode, subpcode; 2995 u32 alloc_len, len, n; 2996 unsigned char arr[SDEBUG_MAX_LSENSE_SZ]; 2997 unsigned char *cmd = scp->cmnd; 2998 2999 memset(arr, 0, sizeof(arr)); 3000 ppc = cmd[1] & 0x2; 3001 sp = cmd[1] & 0x1; 3002 if (ppc || sp) { 3003 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, ppc ? 1 : 0); 3004 return check_condition_result; 3005 } 3006 pcode = cmd[2] & 0x3f; 3007 subpcode = cmd[3] & 0xff; 3008 alloc_len = get_unaligned_be16(cmd + 7); 3009 arr[0] = pcode; 3010 if (0 == subpcode) { 3011 switch (pcode) { 3012 case 0x0: /* Supported log pages log page */ 3013 n = 4; 3014 arr[n++] = 0x0; /* this page */ 3015 arr[n++] = 0xd; /* Temperature */ 3016 arr[n++] = 0x2f; /* Informational exceptions */ 3017 arr[3] = n - 4; 3018 break; 3019 case 0xd: /* Temperature log page */ 3020 arr[3] = resp_temp_l_pg(arr + 4); 3021 break; 3022 case 0x2f: /* Informational exceptions log page */ 3023 arr[3] = resp_ie_l_pg(arr + 4); 3024 break; 3025 default: 3026 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 5); 3027 return check_condition_result; 3028 } 3029 } else if (0xff == subpcode) { 3030 arr[0] |= 0x40; 3031 arr[1] = subpcode; 3032 switch (pcode) { 3033 case 0x0: /* Supported log pages and subpages log page */ 3034 n = 4; 3035 arr[n++] = 0x0; 3036 arr[n++] = 0x0; /* 0,0 page */ 3037 arr[n++] = 0x0; 3038 arr[n++] = 0xff; /* this page */ 3039 arr[n++] = 0xd; 3040 arr[n++] = 0x0; /* Temperature */ 3041 arr[n++] = 0xd; 3042 arr[n++] = 0x1; /* Environment reporting */ 3043 arr[n++] = 0xd; 3044 arr[n++] = 0xff; /* all 0xd subpages */ 3045 arr[n++] = 0x2f; 3046 arr[n++] = 0x0; /* Informational exceptions */ 3047 arr[n++] = 0x2f; 3048 arr[n++] = 0xff; /* all 0x2f subpages */ 3049 arr[3] = n - 4; 3050 break; 3051 case 0xd: /* Temperature subpages */ 3052 n = 4; 3053 arr[n++] = 0xd; 3054 arr[n++] = 0x0; /* Temperature */ 3055 arr[n++] = 0xd; 3056 arr[n++] = 0x1; /* Environment reporting */ 3057 arr[n++] = 0xd; 3058 arr[n++] = 0xff; /* these subpages */ 3059 arr[3] = n - 4; 3060 break; 3061 case 0x2f: /* Informational exceptions subpages */ 3062 n = 4; 3063 arr[n++] = 0x2f; 3064 arr[n++] = 0x0; /* Informational exceptions */ 3065 arr[n++] = 0x2f; 3066 arr[n++] = 0xff; /* these subpages */ 3067 arr[3] = n - 4; 3068 break; 3069 default: 3070 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 5); 3071 return check_condition_result; 3072 } 3073 } else if (subpcode > 0) { 3074 arr[0] |= 0x40; 3075 arr[1] = subpcode; 3076 if (pcode == 0xd && subpcode == 1) 3077 arr[3] = resp_env_rep_l_spg(arr + 4); 3078 else { 3079 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 5); 3080 return check_condition_result; 3081 } 3082 } else { 3083 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1); 3084 return check_condition_result; 3085 } 3086 len = min_t(u32, get_unaligned_be16(arr + 2) + 4, alloc_len); 3087 return fill_from_dev_buffer(scp, arr, 3088 min_t(u32, len, SDEBUG_MAX_INQ_ARR_SZ)); 3089 } 3090 3091 static inline bool sdebug_dev_is_zoned(struct sdebug_dev_info *devip) 3092 { 3093 return devip->nr_zones != 0; 3094 } 3095 3096 static struct sdeb_zone_state *zbc_zone(struct sdebug_dev_info *devip, 3097 unsigned long long lba) 3098 { 3099 u32 zno = lba >> devip->zsize_shift; 3100 struct sdeb_zone_state *zsp; 3101 3102 if (devip->zcap == devip->zsize || zno < devip->nr_conv_zones) 3103 return &devip->zstate[zno]; 3104 3105 /* 3106 * If the zone capacity is less than the zone size, adjust for gap 3107 * zones. 3108 */ 3109 zno = 2 * zno - devip->nr_conv_zones; 3110 WARN_ONCE(zno >= devip->nr_zones, "%u > %u\n", zno, devip->nr_zones); 3111 zsp = &devip->zstate[zno]; 3112 if (lba >= zsp->z_start + zsp->z_size) 3113 zsp++; 3114 WARN_ON_ONCE(lba >= zsp->z_start + zsp->z_size); 3115 return zsp; 3116 } 3117 3118 static inline bool zbc_zone_is_conv(struct sdeb_zone_state *zsp) 3119 { 3120 return zsp->z_type == ZBC_ZTYPE_CNV; 3121 } 3122 3123 static inline bool zbc_zone_is_gap(struct sdeb_zone_state *zsp) 3124 { 3125 return zsp->z_type == ZBC_ZTYPE_GAP; 3126 } 3127 3128 static inline bool zbc_zone_is_seq(struct sdeb_zone_state *zsp) 3129 { 3130 return !zbc_zone_is_conv(zsp) && !zbc_zone_is_gap(zsp); 3131 } 3132 3133 static void zbc_close_zone(struct sdebug_dev_info *devip, 3134 struct sdeb_zone_state *zsp) 3135 { 3136 enum sdebug_z_cond zc; 3137 3138 if (!zbc_zone_is_seq(zsp)) 3139 return; 3140 3141 zc = zsp->z_cond; 3142 if (!(zc == ZC2_IMPLICIT_OPEN || zc == ZC3_EXPLICIT_OPEN)) 3143 return; 3144 3145 if (zc == ZC2_IMPLICIT_OPEN) 3146 devip->nr_imp_open--; 3147 else 3148 devip->nr_exp_open--; 3149 3150 if (zsp->z_wp == zsp->z_start) { 3151 zsp->z_cond = ZC1_EMPTY; 3152 } else { 3153 zsp->z_cond = ZC4_CLOSED; 3154 devip->nr_closed++; 3155 } 3156 } 3157 3158 static void zbc_close_imp_open_zone(struct sdebug_dev_info *devip) 3159 { 3160 struct sdeb_zone_state *zsp = &devip->zstate[0]; 3161 unsigned int i; 3162 3163 for (i = 0; i < devip->nr_zones; i++, zsp++) { 3164 if (zsp->z_cond == ZC2_IMPLICIT_OPEN) { 3165 zbc_close_zone(devip, zsp); 3166 return; 3167 } 3168 } 3169 } 3170 3171 static void zbc_open_zone(struct sdebug_dev_info *devip, 3172 struct sdeb_zone_state *zsp, bool explicit) 3173 { 3174 enum sdebug_z_cond zc; 3175 3176 if (!zbc_zone_is_seq(zsp)) 3177 return; 3178 3179 zc = zsp->z_cond; 3180 if ((explicit && zc == ZC3_EXPLICIT_OPEN) || 3181 (!explicit && zc == ZC2_IMPLICIT_OPEN)) 3182 return; 3183 3184 /* Close an implicit open zone if necessary */ 3185 if (explicit && zsp->z_cond == ZC2_IMPLICIT_OPEN) 3186 zbc_close_zone(devip, zsp); 3187 else if (devip->max_open && 3188 devip->nr_imp_open + devip->nr_exp_open >= devip->max_open) 3189 zbc_close_imp_open_zone(devip); 3190 3191 if (zsp->z_cond == ZC4_CLOSED) 3192 devip->nr_closed--; 3193 if (explicit) { 3194 zsp->z_cond = ZC3_EXPLICIT_OPEN; 3195 devip->nr_exp_open++; 3196 } else { 3197 zsp->z_cond = ZC2_IMPLICIT_OPEN; 3198 devip->nr_imp_open++; 3199 } 3200 } 3201 3202 static inline void zbc_set_zone_full(struct sdebug_dev_info *devip, 3203 struct sdeb_zone_state *zsp) 3204 { 3205 switch (zsp->z_cond) { 3206 case ZC2_IMPLICIT_OPEN: 3207 devip->nr_imp_open--; 3208 break; 3209 case ZC3_EXPLICIT_OPEN: 3210 devip->nr_exp_open--; 3211 break; 3212 default: 3213 WARN_ONCE(true, "Invalid zone %llu condition %x\n", 3214 zsp->z_start, zsp->z_cond); 3215 break; 3216 } 3217 zsp->z_cond = ZC5_FULL; 3218 } 3219 3220 static void zbc_inc_wp(struct sdebug_dev_info *devip, 3221 unsigned long long lba, unsigned int num) 3222 { 3223 struct sdeb_zone_state *zsp = zbc_zone(devip, lba); 3224 unsigned long long n, end, zend = zsp->z_start + zsp->z_size; 3225 3226 if (!zbc_zone_is_seq(zsp)) 3227 return; 3228 3229 if (zsp->z_type == ZBC_ZTYPE_SWR) { 3230 zsp->z_wp += num; 3231 if (zsp->z_wp >= zend) 3232 zbc_set_zone_full(devip, zsp); 3233 return; 3234 } 3235 3236 while (num) { 3237 if (lba != zsp->z_wp) 3238 zsp->z_non_seq_resource = true; 3239 3240 end = lba + num; 3241 if (end >= zend) { 3242 n = zend - lba; 3243 zsp->z_wp = zend; 3244 } else if (end > zsp->z_wp) { 3245 n = num; 3246 zsp->z_wp = end; 3247 } else { 3248 n = num; 3249 } 3250 if (zsp->z_wp >= zend) 3251 zbc_set_zone_full(devip, zsp); 3252 3253 num -= n; 3254 lba += n; 3255 if (num) { 3256 zsp++; 3257 zend = zsp->z_start + zsp->z_size; 3258 } 3259 } 3260 } 3261 3262 static int check_zbc_access_params(struct scsi_cmnd *scp, 3263 unsigned long long lba, unsigned int num, bool write) 3264 { 3265 struct scsi_device *sdp = scp->device; 3266 struct sdebug_dev_info *devip = (struct sdebug_dev_info *)sdp->hostdata; 3267 struct sdeb_zone_state *zsp = zbc_zone(devip, lba); 3268 struct sdeb_zone_state *zsp_end = zbc_zone(devip, lba + num - 1); 3269 3270 if (!write) { 3271 /* For host-managed, reads cannot cross zone types boundaries */ 3272 if (zsp->z_type != zsp_end->z_type) { 3273 mk_sense_buffer(scp, ILLEGAL_REQUEST, 3274 LBA_OUT_OF_RANGE, 3275 READ_INVDATA_ASCQ); 3276 return check_condition_result; 3277 } 3278 return 0; 3279 } 3280 3281 /* Writing into a gap zone is not allowed */ 3282 if (zbc_zone_is_gap(zsp)) { 3283 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 3284 ATTEMPT_ACCESS_GAP); 3285 return check_condition_result; 3286 } 3287 3288 /* No restrictions for writes within conventional zones */ 3289 if (zbc_zone_is_conv(zsp)) { 3290 if (!zbc_zone_is_conv(zsp_end)) { 3291 mk_sense_buffer(scp, ILLEGAL_REQUEST, 3292 LBA_OUT_OF_RANGE, 3293 WRITE_BOUNDARY_ASCQ); 3294 return check_condition_result; 3295 } 3296 return 0; 3297 } 3298 3299 if (zsp->z_type == ZBC_ZTYPE_SWR) { 3300 /* Writes cannot cross sequential zone boundaries */ 3301 if (zsp_end != zsp) { 3302 mk_sense_buffer(scp, ILLEGAL_REQUEST, 3303 LBA_OUT_OF_RANGE, 3304 WRITE_BOUNDARY_ASCQ); 3305 return check_condition_result; 3306 } 3307 /* Cannot write full zones */ 3308 if (zsp->z_cond == ZC5_FULL) { 3309 mk_sense_buffer(scp, ILLEGAL_REQUEST, 3310 INVALID_FIELD_IN_CDB, 0); 3311 return check_condition_result; 3312 } 3313 /* Writes must be aligned to the zone WP */ 3314 if (lba != zsp->z_wp) { 3315 mk_sense_buffer(scp, ILLEGAL_REQUEST, 3316 LBA_OUT_OF_RANGE, 3317 UNALIGNED_WRITE_ASCQ); 3318 return check_condition_result; 3319 } 3320 } 3321 3322 /* Handle implicit open of closed and empty zones */ 3323 if (zsp->z_cond == ZC1_EMPTY || zsp->z_cond == ZC4_CLOSED) { 3324 if (devip->max_open && 3325 devip->nr_exp_open >= devip->max_open) { 3326 mk_sense_buffer(scp, DATA_PROTECT, 3327 INSUFF_RES_ASC, 3328 INSUFF_ZONE_ASCQ); 3329 return check_condition_result; 3330 } 3331 zbc_open_zone(devip, zsp, false); 3332 } 3333 3334 return 0; 3335 } 3336 3337 static inline int check_device_access_params 3338 (struct scsi_cmnd *scp, unsigned long long lba, 3339 unsigned int num, bool write) 3340 { 3341 struct scsi_device *sdp = scp->device; 3342 struct sdebug_dev_info *devip = (struct sdebug_dev_info *)sdp->hostdata; 3343 3344 if (lba + num > sdebug_capacity) { 3345 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0); 3346 return check_condition_result; 3347 } 3348 /* transfer length excessive (tie in to block limits VPD page) */ 3349 if (num > sdebug_store_sectors) { 3350 /* needs work to find which cdb byte 'num' comes from */ 3351 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0); 3352 return check_condition_result; 3353 } 3354 if (write && unlikely(sdebug_wp)) { 3355 mk_sense_buffer(scp, DATA_PROTECT, WRITE_PROTECTED, 0x2); 3356 return check_condition_result; 3357 } 3358 if (sdebug_dev_is_zoned(devip)) 3359 return check_zbc_access_params(scp, lba, num, write); 3360 3361 return 0; 3362 } 3363 3364 /* 3365 * Note: if BUG_ON() fires it usually indicates a problem with the parser 3366 * tables. Perhaps a missing F_FAKE_RW or FF_MEDIA_IO flag. Response functions 3367 * that access any of the "stores" in struct sdeb_store_info should call this 3368 * function with bug_if_fake_rw set to true. 3369 */ 3370 static inline struct sdeb_store_info *devip2sip(struct sdebug_dev_info *devip, 3371 bool bug_if_fake_rw) 3372 { 3373 if (sdebug_fake_rw) { 3374 BUG_ON(bug_if_fake_rw); /* See note above */ 3375 return NULL; 3376 } 3377 return xa_load(per_store_ap, devip->sdbg_host->si_idx); 3378 } 3379 3380 /* Returns number of bytes copied or -1 if error. */ 3381 static int do_device_access(struct sdeb_store_info *sip, struct scsi_cmnd *scp, 3382 u32 sg_skip, u64 lba, u32 num, bool do_write, 3383 u8 group_number) 3384 { 3385 int ret; 3386 u64 block, rest = 0; 3387 enum dma_data_direction dir; 3388 struct scsi_data_buffer *sdb = &scp->sdb; 3389 u8 *fsp; 3390 3391 if (do_write) { 3392 dir = DMA_TO_DEVICE; 3393 write_since_sync = true; 3394 } else { 3395 dir = DMA_FROM_DEVICE; 3396 } 3397 3398 if (!sdb->length || !sip) 3399 return 0; 3400 if (scp->sc_data_direction != dir) 3401 return -1; 3402 3403 if (do_write && group_number < ARRAY_SIZE(writes_by_group_number)) 3404 atomic_long_inc(&writes_by_group_number[group_number]); 3405 3406 fsp = sip->storep; 3407 3408 block = do_div(lba, sdebug_store_sectors); 3409 if (block + num > sdebug_store_sectors) 3410 rest = block + num - sdebug_store_sectors; 3411 3412 ret = sg_copy_buffer(sdb->table.sgl, sdb->table.nents, 3413 fsp + (block * sdebug_sector_size), 3414 (num - rest) * sdebug_sector_size, sg_skip, do_write); 3415 if (ret != (num - rest) * sdebug_sector_size) 3416 return ret; 3417 3418 if (rest) { 3419 ret += sg_copy_buffer(sdb->table.sgl, sdb->table.nents, 3420 fsp, rest * sdebug_sector_size, 3421 sg_skip + ((num - rest) * sdebug_sector_size), 3422 do_write); 3423 } 3424 3425 return ret; 3426 } 3427 3428 /* Returns number of bytes copied or -1 if error. */ 3429 static int do_dout_fetch(struct scsi_cmnd *scp, u32 num, u8 *doutp) 3430 { 3431 struct scsi_data_buffer *sdb = &scp->sdb; 3432 3433 if (!sdb->length) 3434 return 0; 3435 if (scp->sc_data_direction != DMA_TO_DEVICE) 3436 return -1; 3437 return sg_copy_buffer(sdb->table.sgl, sdb->table.nents, doutp, 3438 num * sdebug_sector_size, 0, true); 3439 } 3440 3441 /* If sip->storep+lba compares equal to arr(num), then copy top half of 3442 * arr into sip->storep+lba and return true. If comparison fails then 3443 * return false. */ 3444 static bool comp_write_worker(struct sdeb_store_info *sip, u64 lba, u32 num, 3445 const u8 *arr, bool compare_only) 3446 { 3447 bool res; 3448 u64 block, rest = 0; 3449 u32 store_blks = sdebug_store_sectors; 3450 u32 lb_size = sdebug_sector_size; 3451 u8 *fsp = sip->storep; 3452 3453 block = do_div(lba, store_blks); 3454 if (block + num > store_blks) 3455 rest = block + num - store_blks; 3456 3457 res = !memcmp(fsp + (block * lb_size), arr, (num - rest) * lb_size); 3458 if (!res) 3459 return res; 3460 if (rest) 3461 res = memcmp(fsp, arr + ((num - rest) * lb_size), 3462 rest * lb_size); 3463 if (!res) 3464 return res; 3465 if (compare_only) 3466 return true; 3467 arr += num * lb_size; 3468 memcpy(fsp + (block * lb_size), arr, (num - rest) * lb_size); 3469 if (rest) 3470 memcpy(fsp, arr + ((num - rest) * lb_size), rest * lb_size); 3471 return res; 3472 } 3473 3474 static __be16 dif_compute_csum(const void *buf, int len) 3475 { 3476 __be16 csum; 3477 3478 if (sdebug_guard) 3479 csum = (__force __be16)ip_compute_csum(buf, len); 3480 else 3481 csum = cpu_to_be16(crc_t10dif(buf, len)); 3482 3483 return csum; 3484 } 3485 3486 static int dif_verify(struct t10_pi_tuple *sdt, const void *data, 3487 sector_t sector, u32 ei_lba) 3488 { 3489 __be16 csum = dif_compute_csum(data, sdebug_sector_size); 3490 3491 if (sdt->guard_tag != csum) { 3492 pr_err("GUARD check failed on sector %lu rcvd 0x%04x, data 0x%04x\n", 3493 (unsigned long)sector, 3494 be16_to_cpu(sdt->guard_tag), 3495 be16_to_cpu(csum)); 3496 return 0x01; 3497 } 3498 if (sdebug_dif == T10_PI_TYPE1_PROTECTION && 3499 be32_to_cpu(sdt->ref_tag) != (sector & 0xffffffff)) { 3500 pr_err("REF check failed on sector %lu\n", 3501 (unsigned long)sector); 3502 return 0x03; 3503 } 3504 if (sdebug_dif == T10_PI_TYPE2_PROTECTION && 3505 be32_to_cpu(sdt->ref_tag) != ei_lba) { 3506 pr_err("REF check failed on sector %lu\n", 3507 (unsigned long)sector); 3508 return 0x03; 3509 } 3510 return 0; 3511 } 3512 3513 static void dif_copy_prot(struct scsi_cmnd *scp, sector_t sector, 3514 unsigned int sectors, bool read) 3515 { 3516 size_t resid; 3517 void *paddr; 3518 struct sdeb_store_info *sip = devip2sip((struct sdebug_dev_info *) 3519 scp->device->hostdata, true); 3520 struct t10_pi_tuple *dif_storep = sip->dif_storep; 3521 const void *dif_store_end = dif_storep + sdebug_store_sectors; 3522 struct sg_mapping_iter miter; 3523 3524 /* Bytes of protection data to copy into sgl */ 3525 resid = sectors * sizeof(*dif_storep); 3526 3527 sg_miter_start(&miter, scsi_prot_sglist(scp), 3528 scsi_prot_sg_count(scp), SG_MITER_ATOMIC | 3529 (read ? SG_MITER_TO_SG : SG_MITER_FROM_SG)); 3530 3531 while (sg_miter_next(&miter) && resid > 0) { 3532 size_t len = min_t(size_t, miter.length, resid); 3533 void *start = dif_store(sip, sector); 3534 size_t rest = 0; 3535 3536 if (dif_store_end < start + len) 3537 rest = start + len - dif_store_end; 3538 3539 paddr = miter.addr; 3540 3541 if (read) 3542 memcpy(paddr, start, len - rest); 3543 else 3544 memcpy(start, paddr, len - rest); 3545 3546 if (rest) { 3547 if (read) 3548 memcpy(paddr + len - rest, dif_storep, rest); 3549 else 3550 memcpy(dif_storep, paddr + len - rest, rest); 3551 } 3552 3553 sector += len / sizeof(*dif_storep); 3554 resid -= len; 3555 } 3556 sg_miter_stop(&miter); 3557 } 3558 3559 static int prot_verify_read(struct scsi_cmnd *scp, sector_t start_sec, 3560 unsigned int sectors, u32 ei_lba) 3561 { 3562 int ret = 0; 3563 unsigned int i; 3564 sector_t sector; 3565 struct sdeb_store_info *sip = devip2sip((struct sdebug_dev_info *) 3566 scp->device->hostdata, true); 3567 struct t10_pi_tuple *sdt; 3568 3569 for (i = 0; i < sectors; i++, ei_lba++) { 3570 sector = start_sec + i; 3571 sdt = dif_store(sip, sector); 3572 3573 if (sdt->app_tag == cpu_to_be16(0xffff)) 3574 continue; 3575 3576 /* 3577 * Because scsi_debug acts as both initiator and 3578 * target we proceed to verify the PI even if 3579 * RDPROTECT=3. This is done so the "initiator" knows 3580 * which type of error to return. Otherwise we would 3581 * have to iterate over the PI twice. 3582 */ 3583 if (scp->cmnd[1] >> 5) { /* RDPROTECT */ 3584 ret = dif_verify(sdt, lba2fake_store(sip, sector), 3585 sector, ei_lba); 3586 if (ret) { 3587 dif_errors++; 3588 break; 3589 } 3590 } 3591 } 3592 3593 dif_copy_prot(scp, start_sec, sectors, true); 3594 dix_reads++; 3595 3596 return ret; 3597 } 3598 3599 static inline void 3600 sdeb_read_lock(struct sdeb_store_info *sip) 3601 { 3602 if (sdebug_no_rwlock) { 3603 if (sip) 3604 __acquire(&sip->macc_lck); 3605 else 3606 __acquire(&sdeb_fake_rw_lck); 3607 } else { 3608 if (sip) 3609 read_lock(&sip->macc_lck); 3610 else 3611 read_lock(&sdeb_fake_rw_lck); 3612 } 3613 } 3614 3615 static inline void 3616 sdeb_read_unlock(struct sdeb_store_info *sip) 3617 { 3618 if (sdebug_no_rwlock) { 3619 if (sip) 3620 __release(&sip->macc_lck); 3621 else 3622 __release(&sdeb_fake_rw_lck); 3623 } else { 3624 if (sip) 3625 read_unlock(&sip->macc_lck); 3626 else 3627 read_unlock(&sdeb_fake_rw_lck); 3628 } 3629 } 3630 3631 static inline void 3632 sdeb_write_lock(struct sdeb_store_info *sip) 3633 { 3634 if (sdebug_no_rwlock) { 3635 if (sip) 3636 __acquire(&sip->macc_lck); 3637 else 3638 __acquire(&sdeb_fake_rw_lck); 3639 } else { 3640 if (sip) 3641 write_lock(&sip->macc_lck); 3642 else 3643 write_lock(&sdeb_fake_rw_lck); 3644 } 3645 } 3646 3647 static inline void 3648 sdeb_write_unlock(struct sdeb_store_info *sip) 3649 { 3650 if (sdebug_no_rwlock) { 3651 if (sip) 3652 __release(&sip->macc_lck); 3653 else 3654 __release(&sdeb_fake_rw_lck); 3655 } else { 3656 if (sip) 3657 write_unlock(&sip->macc_lck); 3658 else 3659 write_unlock(&sdeb_fake_rw_lck); 3660 } 3661 } 3662 3663 static int resp_read_dt0(struct scsi_cmnd *scp, struct sdebug_dev_info *devip) 3664 { 3665 bool check_prot; 3666 u32 num; 3667 u32 ei_lba; 3668 int ret; 3669 u64 lba; 3670 struct sdeb_store_info *sip = devip2sip(devip, true); 3671 u8 *cmd = scp->cmnd; 3672 3673 switch (cmd[0]) { 3674 case READ_16: 3675 ei_lba = 0; 3676 lba = get_unaligned_be64(cmd + 2); 3677 num = get_unaligned_be32(cmd + 10); 3678 check_prot = true; 3679 break; 3680 case READ_10: 3681 ei_lba = 0; 3682 lba = get_unaligned_be32(cmd + 2); 3683 num = get_unaligned_be16(cmd + 7); 3684 check_prot = true; 3685 break; 3686 case READ_6: 3687 ei_lba = 0; 3688 lba = (u32)cmd[3] | (u32)cmd[2] << 8 | 3689 (u32)(cmd[1] & 0x1f) << 16; 3690 num = (0 == cmd[4]) ? 256 : cmd[4]; 3691 check_prot = true; 3692 break; 3693 case READ_12: 3694 ei_lba = 0; 3695 lba = get_unaligned_be32(cmd + 2); 3696 num = get_unaligned_be32(cmd + 6); 3697 check_prot = true; 3698 break; 3699 case XDWRITEREAD_10: 3700 ei_lba = 0; 3701 lba = get_unaligned_be32(cmd + 2); 3702 num = get_unaligned_be16(cmd + 7); 3703 check_prot = false; 3704 break; 3705 default: /* assume READ(32) */ 3706 lba = get_unaligned_be64(cmd + 12); 3707 ei_lba = get_unaligned_be32(cmd + 20); 3708 num = get_unaligned_be32(cmd + 28); 3709 check_prot = false; 3710 break; 3711 } 3712 if (unlikely(have_dif_prot && check_prot)) { 3713 if (sdebug_dif == T10_PI_TYPE2_PROTECTION && 3714 (cmd[1] & 0xe0)) { 3715 mk_sense_invalid_opcode(scp); 3716 return check_condition_result; 3717 } 3718 if ((sdebug_dif == T10_PI_TYPE1_PROTECTION || 3719 sdebug_dif == T10_PI_TYPE3_PROTECTION) && 3720 (cmd[1] & 0xe0) == 0) 3721 sdev_printk(KERN_ERR, scp->device, "Unprotected RD " 3722 "to DIF device\n"); 3723 } 3724 if (unlikely((sdebug_opts & SDEBUG_OPT_SHORT_TRANSFER) && 3725 atomic_read(&sdeb_inject_pending))) { 3726 num /= 2; 3727 atomic_set(&sdeb_inject_pending, 0); 3728 } 3729 3730 ret = check_device_access_params(scp, lba, num, false); 3731 if (ret) 3732 return ret; 3733 if (unlikely((SDEBUG_OPT_MEDIUM_ERR & sdebug_opts) && 3734 (lba <= (sdebug_medium_error_start + sdebug_medium_error_count - 1)) && 3735 ((lba + num) > sdebug_medium_error_start))) { 3736 /* claim unrecoverable read error */ 3737 mk_sense_buffer(scp, MEDIUM_ERROR, UNRECOVERED_READ_ERR, 0); 3738 /* set info field and valid bit for fixed descriptor */ 3739 if (0x70 == (scp->sense_buffer[0] & 0x7f)) { 3740 scp->sense_buffer[0] |= 0x80; /* Valid bit */ 3741 ret = (lba < OPT_MEDIUM_ERR_ADDR) 3742 ? OPT_MEDIUM_ERR_ADDR : (int)lba; 3743 put_unaligned_be32(ret, scp->sense_buffer + 3); 3744 } 3745 scsi_set_resid(scp, scsi_bufflen(scp)); 3746 return check_condition_result; 3747 } 3748 3749 sdeb_read_lock(sip); 3750 3751 /* DIX + T10 DIF */ 3752 if (unlikely(sdebug_dix && scsi_prot_sg_count(scp))) { 3753 switch (prot_verify_read(scp, lba, num, ei_lba)) { 3754 case 1: /* Guard tag error */ 3755 if (cmd[1] >> 5 != 3) { /* RDPROTECT != 3 */ 3756 sdeb_read_unlock(sip); 3757 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 1); 3758 return check_condition_result; 3759 } else if (scp->prot_flags & SCSI_PROT_GUARD_CHECK) { 3760 sdeb_read_unlock(sip); 3761 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 1); 3762 return illegal_condition_result; 3763 } 3764 break; 3765 case 3: /* Reference tag error */ 3766 if (cmd[1] >> 5 != 3) { /* RDPROTECT != 3 */ 3767 sdeb_read_unlock(sip); 3768 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 3); 3769 return check_condition_result; 3770 } else if (scp->prot_flags & SCSI_PROT_REF_CHECK) { 3771 sdeb_read_unlock(sip); 3772 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 3); 3773 return illegal_condition_result; 3774 } 3775 break; 3776 } 3777 } 3778 3779 ret = do_device_access(sip, scp, 0, lba, num, false, 0); 3780 sdeb_read_unlock(sip); 3781 if (unlikely(ret == -1)) 3782 return DID_ERROR << 16; 3783 3784 scsi_set_resid(scp, scsi_bufflen(scp) - ret); 3785 3786 if (unlikely((sdebug_opts & SDEBUG_OPT_RECOV_DIF_DIX) && 3787 atomic_read(&sdeb_inject_pending))) { 3788 if (sdebug_opts & SDEBUG_OPT_RECOVERED_ERR) { 3789 mk_sense_buffer(scp, RECOVERED_ERROR, THRESHOLD_EXCEEDED, 0); 3790 atomic_set(&sdeb_inject_pending, 0); 3791 return check_condition_result; 3792 } else if (sdebug_opts & SDEBUG_OPT_DIF_ERR) { 3793 /* Logical block guard check failed */ 3794 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 1); 3795 atomic_set(&sdeb_inject_pending, 0); 3796 return illegal_condition_result; 3797 } else if (SDEBUG_OPT_DIX_ERR & sdebug_opts) { 3798 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 1); 3799 atomic_set(&sdeb_inject_pending, 0); 3800 return illegal_condition_result; 3801 } 3802 } 3803 return 0; 3804 } 3805 3806 static int prot_verify_write(struct scsi_cmnd *SCpnt, sector_t start_sec, 3807 unsigned int sectors, u32 ei_lba) 3808 { 3809 int ret; 3810 struct t10_pi_tuple *sdt; 3811 void *daddr; 3812 sector_t sector = start_sec; 3813 int ppage_offset; 3814 int dpage_offset; 3815 struct sg_mapping_iter diter; 3816 struct sg_mapping_iter piter; 3817 3818 BUG_ON(scsi_sg_count(SCpnt) == 0); 3819 BUG_ON(scsi_prot_sg_count(SCpnt) == 0); 3820 3821 sg_miter_start(&piter, scsi_prot_sglist(SCpnt), 3822 scsi_prot_sg_count(SCpnt), 3823 SG_MITER_ATOMIC | SG_MITER_FROM_SG); 3824 sg_miter_start(&diter, scsi_sglist(SCpnt), scsi_sg_count(SCpnt), 3825 SG_MITER_ATOMIC | SG_MITER_FROM_SG); 3826 3827 /* For each protection page */ 3828 while (sg_miter_next(&piter)) { 3829 dpage_offset = 0; 3830 if (WARN_ON(!sg_miter_next(&diter))) { 3831 ret = 0x01; 3832 goto out; 3833 } 3834 3835 for (ppage_offset = 0; ppage_offset < piter.length; 3836 ppage_offset += sizeof(struct t10_pi_tuple)) { 3837 /* If we're at the end of the current 3838 * data page advance to the next one 3839 */ 3840 if (dpage_offset >= diter.length) { 3841 if (WARN_ON(!sg_miter_next(&diter))) { 3842 ret = 0x01; 3843 goto out; 3844 } 3845 dpage_offset = 0; 3846 } 3847 3848 sdt = piter.addr + ppage_offset; 3849 daddr = diter.addr + dpage_offset; 3850 3851 if (SCpnt->cmnd[1] >> 5 != 3) { /* WRPROTECT */ 3852 ret = dif_verify(sdt, daddr, sector, ei_lba); 3853 if (ret) 3854 goto out; 3855 } 3856 3857 sector++; 3858 ei_lba++; 3859 dpage_offset += sdebug_sector_size; 3860 } 3861 diter.consumed = dpage_offset; 3862 sg_miter_stop(&diter); 3863 } 3864 sg_miter_stop(&piter); 3865 3866 dif_copy_prot(SCpnt, start_sec, sectors, false); 3867 dix_writes++; 3868 3869 return 0; 3870 3871 out: 3872 dif_errors++; 3873 sg_miter_stop(&diter); 3874 sg_miter_stop(&piter); 3875 return ret; 3876 } 3877 3878 static unsigned long lba_to_map_index(sector_t lba) 3879 { 3880 if (sdebug_unmap_alignment) 3881 lba += sdebug_unmap_granularity - sdebug_unmap_alignment; 3882 sector_div(lba, sdebug_unmap_granularity); 3883 return lba; 3884 } 3885 3886 static sector_t map_index_to_lba(unsigned long index) 3887 { 3888 sector_t lba = index * sdebug_unmap_granularity; 3889 3890 if (sdebug_unmap_alignment) 3891 lba -= sdebug_unmap_granularity - sdebug_unmap_alignment; 3892 return lba; 3893 } 3894 3895 static unsigned int map_state(struct sdeb_store_info *sip, sector_t lba, 3896 unsigned int *num) 3897 { 3898 sector_t end; 3899 unsigned int mapped; 3900 unsigned long index; 3901 unsigned long next; 3902 3903 index = lba_to_map_index(lba); 3904 mapped = test_bit(index, sip->map_storep); 3905 3906 if (mapped) 3907 next = find_next_zero_bit(sip->map_storep, map_size, index); 3908 else 3909 next = find_next_bit(sip->map_storep, map_size, index); 3910 3911 end = min_t(sector_t, sdebug_store_sectors, map_index_to_lba(next)); 3912 *num = end - lba; 3913 return mapped; 3914 } 3915 3916 static void map_region(struct sdeb_store_info *sip, sector_t lba, 3917 unsigned int len) 3918 { 3919 sector_t end = lba + len; 3920 3921 while (lba < end) { 3922 unsigned long index = lba_to_map_index(lba); 3923 3924 if (index < map_size) 3925 set_bit(index, sip->map_storep); 3926 3927 lba = map_index_to_lba(index + 1); 3928 } 3929 } 3930 3931 static void unmap_region(struct sdeb_store_info *sip, sector_t lba, 3932 unsigned int len) 3933 { 3934 sector_t end = lba + len; 3935 u8 *fsp = sip->storep; 3936 3937 while (lba < end) { 3938 unsigned long index = lba_to_map_index(lba); 3939 3940 if (lba == map_index_to_lba(index) && 3941 lba + sdebug_unmap_granularity <= end && 3942 index < map_size) { 3943 clear_bit(index, sip->map_storep); 3944 if (sdebug_lbprz) { /* for LBPRZ=2 return 0xff_s */ 3945 memset(fsp + lba * sdebug_sector_size, 3946 (sdebug_lbprz & 1) ? 0 : 0xff, 3947 sdebug_sector_size * 3948 sdebug_unmap_granularity); 3949 } 3950 if (sip->dif_storep) { 3951 memset(sip->dif_storep + lba, 0xff, 3952 sizeof(*sip->dif_storep) * 3953 sdebug_unmap_granularity); 3954 } 3955 } 3956 lba = map_index_to_lba(index + 1); 3957 } 3958 } 3959 3960 static int resp_write_dt0(struct scsi_cmnd *scp, struct sdebug_dev_info *devip) 3961 { 3962 bool check_prot; 3963 u32 num; 3964 u8 group = 0; 3965 u32 ei_lba; 3966 int ret; 3967 u64 lba; 3968 struct sdeb_store_info *sip = devip2sip(devip, true); 3969 u8 *cmd = scp->cmnd; 3970 3971 switch (cmd[0]) { 3972 case WRITE_16: 3973 ei_lba = 0; 3974 lba = get_unaligned_be64(cmd + 2); 3975 num = get_unaligned_be32(cmd + 10); 3976 group = cmd[14] & 0x3f; 3977 check_prot = true; 3978 break; 3979 case WRITE_10: 3980 ei_lba = 0; 3981 lba = get_unaligned_be32(cmd + 2); 3982 group = cmd[6] & 0x3f; 3983 num = get_unaligned_be16(cmd + 7); 3984 check_prot = true; 3985 break; 3986 case WRITE_6: 3987 ei_lba = 0; 3988 lba = (u32)cmd[3] | (u32)cmd[2] << 8 | 3989 (u32)(cmd[1] & 0x1f) << 16; 3990 num = (0 == cmd[4]) ? 256 : cmd[4]; 3991 check_prot = true; 3992 break; 3993 case WRITE_12: 3994 ei_lba = 0; 3995 lba = get_unaligned_be32(cmd + 2); 3996 num = get_unaligned_be32(cmd + 6); 3997 group = cmd[6] & 0x3f; 3998 check_prot = true; 3999 break; 4000 case 0x53: /* XDWRITEREAD(10) */ 4001 ei_lba = 0; 4002 lba = get_unaligned_be32(cmd + 2); 4003 group = cmd[6] & 0x1f; 4004 num = get_unaligned_be16(cmd + 7); 4005 check_prot = false; 4006 break; 4007 default: /* assume WRITE(32) */ 4008 group = cmd[6] & 0x3f; 4009 lba = get_unaligned_be64(cmd + 12); 4010 ei_lba = get_unaligned_be32(cmd + 20); 4011 num = get_unaligned_be32(cmd + 28); 4012 check_prot = false; 4013 break; 4014 } 4015 if (unlikely(have_dif_prot && check_prot)) { 4016 if (sdebug_dif == T10_PI_TYPE2_PROTECTION && 4017 (cmd[1] & 0xe0)) { 4018 mk_sense_invalid_opcode(scp); 4019 return check_condition_result; 4020 } 4021 if ((sdebug_dif == T10_PI_TYPE1_PROTECTION || 4022 sdebug_dif == T10_PI_TYPE3_PROTECTION) && 4023 (cmd[1] & 0xe0) == 0) 4024 sdev_printk(KERN_ERR, scp->device, "Unprotected WR " 4025 "to DIF device\n"); 4026 } 4027 4028 sdeb_write_lock(sip); 4029 ret = check_device_access_params(scp, lba, num, true); 4030 if (ret) { 4031 sdeb_write_unlock(sip); 4032 return ret; 4033 } 4034 4035 /* DIX + T10 DIF */ 4036 if (unlikely(sdebug_dix && scsi_prot_sg_count(scp))) { 4037 switch (prot_verify_write(scp, lba, num, ei_lba)) { 4038 case 1: /* Guard tag error */ 4039 if (scp->prot_flags & SCSI_PROT_GUARD_CHECK) { 4040 sdeb_write_unlock(sip); 4041 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 1); 4042 return illegal_condition_result; 4043 } else if (scp->cmnd[1] >> 5 != 3) { /* WRPROTECT != 3 */ 4044 sdeb_write_unlock(sip); 4045 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 1); 4046 return check_condition_result; 4047 } 4048 break; 4049 case 3: /* Reference tag error */ 4050 if (scp->prot_flags & SCSI_PROT_REF_CHECK) { 4051 sdeb_write_unlock(sip); 4052 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 3); 4053 return illegal_condition_result; 4054 } else if (scp->cmnd[1] >> 5 != 3) { /* WRPROTECT != 3 */ 4055 sdeb_write_unlock(sip); 4056 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 3); 4057 return check_condition_result; 4058 } 4059 break; 4060 } 4061 } 4062 4063 ret = do_device_access(sip, scp, 0, lba, num, true, group); 4064 if (unlikely(scsi_debug_lbp())) 4065 map_region(sip, lba, num); 4066 /* If ZBC zone then bump its write pointer */ 4067 if (sdebug_dev_is_zoned(devip)) 4068 zbc_inc_wp(devip, lba, num); 4069 sdeb_write_unlock(sip); 4070 if (unlikely(-1 == ret)) 4071 return DID_ERROR << 16; 4072 else if (unlikely(sdebug_verbose && 4073 (ret < (num * sdebug_sector_size)))) 4074 sdev_printk(KERN_INFO, scp->device, 4075 "%s: write: cdb indicated=%u, IO sent=%d bytes\n", 4076 my_name, num * sdebug_sector_size, ret); 4077 4078 if (unlikely((sdebug_opts & SDEBUG_OPT_RECOV_DIF_DIX) && 4079 atomic_read(&sdeb_inject_pending))) { 4080 if (sdebug_opts & SDEBUG_OPT_RECOVERED_ERR) { 4081 mk_sense_buffer(scp, RECOVERED_ERROR, THRESHOLD_EXCEEDED, 0); 4082 atomic_set(&sdeb_inject_pending, 0); 4083 return check_condition_result; 4084 } else if (sdebug_opts & SDEBUG_OPT_DIF_ERR) { 4085 /* Logical block guard check failed */ 4086 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 1); 4087 atomic_set(&sdeb_inject_pending, 0); 4088 return illegal_condition_result; 4089 } else if (sdebug_opts & SDEBUG_OPT_DIX_ERR) { 4090 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 1); 4091 atomic_set(&sdeb_inject_pending, 0); 4092 return illegal_condition_result; 4093 } 4094 } 4095 return 0; 4096 } 4097 4098 /* 4099 * T10 has only specified WRITE SCATTERED(16) and WRITE SCATTERED(32). 4100 * No READ GATHERED yet (requires bidi or long cdb holding gather list). 4101 */ 4102 static int resp_write_scat(struct scsi_cmnd *scp, 4103 struct sdebug_dev_info *devip) 4104 { 4105 u8 *cmd = scp->cmnd; 4106 u8 *lrdp = NULL; 4107 u8 *up; 4108 struct sdeb_store_info *sip = devip2sip(devip, true); 4109 u8 wrprotect; 4110 u16 lbdof, num_lrd, k; 4111 u32 num, num_by, bt_len, lbdof_blen, sg_off, cum_lb; 4112 u32 lb_size = sdebug_sector_size; 4113 u32 ei_lba; 4114 u64 lba; 4115 u8 group; 4116 int ret, res; 4117 bool is_16; 4118 static const u32 lrd_size = 32; /* + parameter list header size */ 4119 4120 if (cmd[0] == VARIABLE_LENGTH_CMD) { 4121 is_16 = false; 4122 group = cmd[6] & 0x3f; 4123 wrprotect = (cmd[10] >> 5) & 0x7; 4124 lbdof = get_unaligned_be16(cmd + 12); 4125 num_lrd = get_unaligned_be16(cmd + 16); 4126 bt_len = get_unaligned_be32(cmd + 28); 4127 } else { /* that leaves WRITE SCATTERED(16) */ 4128 is_16 = true; 4129 wrprotect = (cmd[2] >> 5) & 0x7; 4130 lbdof = get_unaligned_be16(cmd + 4); 4131 num_lrd = get_unaligned_be16(cmd + 8); 4132 bt_len = get_unaligned_be32(cmd + 10); 4133 group = cmd[14] & 0x3f; 4134 if (unlikely(have_dif_prot)) { 4135 if (sdebug_dif == T10_PI_TYPE2_PROTECTION && 4136 wrprotect) { 4137 mk_sense_invalid_opcode(scp); 4138 return illegal_condition_result; 4139 } 4140 if ((sdebug_dif == T10_PI_TYPE1_PROTECTION || 4141 sdebug_dif == T10_PI_TYPE3_PROTECTION) && 4142 wrprotect == 0) 4143 sdev_printk(KERN_ERR, scp->device, 4144 "Unprotected WR to DIF device\n"); 4145 } 4146 } 4147 if ((num_lrd == 0) || (bt_len == 0)) 4148 return 0; /* T10 says these do-nothings are not errors */ 4149 if (lbdof == 0) { 4150 if (sdebug_verbose) 4151 sdev_printk(KERN_INFO, scp->device, 4152 "%s: %s: LB Data Offset field bad\n", 4153 my_name, __func__); 4154 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0); 4155 return illegal_condition_result; 4156 } 4157 lbdof_blen = lbdof * lb_size; 4158 if ((lrd_size + (num_lrd * lrd_size)) > lbdof_blen) { 4159 if (sdebug_verbose) 4160 sdev_printk(KERN_INFO, scp->device, 4161 "%s: %s: LBA range descriptors don't fit\n", 4162 my_name, __func__); 4163 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0); 4164 return illegal_condition_result; 4165 } 4166 lrdp = kzalloc(lbdof_blen, GFP_ATOMIC | __GFP_NOWARN); 4167 if (lrdp == NULL) 4168 return SCSI_MLQUEUE_HOST_BUSY; 4169 if (sdebug_verbose) 4170 sdev_printk(KERN_INFO, scp->device, 4171 "%s: %s: Fetch header+scatter_list, lbdof_blen=%u\n", 4172 my_name, __func__, lbdof_blen); 4173 res = fetch_to_dev_buffer(scp, lrdp, lbdof_blen); 4174 if (res == -1) { 4175 ret = DID_ERROR << 16; 4176 goto err_out; 4177 } 4178 4179 sdeb_write_lock(sip); 4180 sg_off = lbdof_blen; 4181 /* Spec says Buffer xfer Length field in number of LBs in dout */ 4182 cum_lb = 0; 4183 for (k = 0, up = lrdp + lrd_size; k < num_lrd; ++k, up += lrd_size) { 4184 lba = get_unaligned_be64(up + 0); 4185 num = get_unaligned_be32(up + 8); 4186 if (sdebug_verbose) 4187 sdev_printk(KERN_INFO, scp->device, 4188 "%s: %s: k=%d LBA=0x%llx num=%u sg_off=%u\n", 4189 my_name, __func__, k, lba, num, sg_off); 4190 if (num == 0) 4191 continue; 4192 ret = check_device_access_params(scp, lba, num, true); 4193 if (ret) 4194 goto err_out_unlock; 4195 num_by = num * lb_size; 4196 ei_lba = is_16 ? 0 : get_unaligned_be32(up + 12); 4197 4198 if ((cum_lb + num) > bt_len) { 4199 if (sdebug_verbose) 4200 sdev_printk(KERN_INFO, scp->device, 4201 "%s: %s: sum of blocks > data provided\n", 4202 my_name, __func__); 4203 mk_sense_buffer(scp, ILLEGAL_REQUEST, WRITE_ERROR_ASC, 4204 0); 4205 ret = illegal_condition_result; 4206 goto err_out_unlock; 4207 } 4208 4209 /* DIX + T10 DIF */ 4210 if (unlikely(sdebug_dix && scsi_prot_sg_count(scp))) { 4211 int prot_ret = prot_verify_write(scp, lba, num, 4212 ei_lba); 4213 4214 if (prot_ret) { 4215 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 4216 prot_ret); 4217 ret = illegal_condition_result; 4218 goto err_out_unlock; 4219 } 4220 } 4221 4222 ret = do_device_access(sip, scp, sg_off, lba, num, true, group); 4223 /* If ZBC zone then bump its write pointer */ 4224 if (sdebug_dev_is_zoned(devip)) 4225 zbc_inc_wp(devip, lba, num); 4226 if (unlikely(scsi_debug_lbp())) 4227 map_region(sip, lba, num); 4228 if (unlikely(-1 == ret)) { 4229 ret = DID_ERROR << 16; 4230 goto err_out_unlock; 4231 } else if (unlikely(sdebug_verbose && (ret < num_by))) 4232 sdev_printk(KERN_INFO, scp->device, 4233 "%s: write: cdb indicated=%u, IO sent=%d bytes\n", 4234 my_name, num_by, ret); 4235 4236 if (unlikely((sdebug_opts & SDEBUG_OPT_RECOV_DIF_DIX) && 4237 atomic_read(&sdeb_inject_pending))) { 4238 if (sdebug_opts & SDEBUG_OPT_RECOVERED_ERR) { 4239 mk_sense_buffer(scp, RECOVERED_ERROR, THRESHOLD_EXCEEDED, 0); 4240 atomic_set(&sdeb_inject_pending, 0); 4241 ret = check_condition_result; 4242 goto err_out_unlock; 4243 } else if (sdebug_opts & SDEBUG_OPT_DIF_ERR) { 4244 /* Logical block guard check failed */ 4245 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 1); 4246 atomic_set(&sdeb_inject_pending, 0); 4247 ret = illegal_condition_result; 4248 goto err_out_unlock; 4249 } else if (sdebug_opts & SDEBUG_OPT_DIX_ERR) { 4250 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 1); 4251 atomic_set(&sdeb_inject_pending, 0); 4252 ret = illegal_condition_result; 4253 goto err_out_unlock; 4254 } 4255 } 4256 sg_off += num_by; 4257 cum_lb += num; 4258 } 4259 ret = 0; 4260 err_out_unlock: 4261 sdeb_write_unlock(sip); 4262 err_out: 4263 kfree(lrdp); 4264 return ret; 4265 } 4266 4267 static int resp_write_same(struct scsi_cmnd *scp, u64 lba, u32 num, 4268 u32 ei_lba, bool unmap, bool ndob) 4269 { 4270 struct scsi_device *sdp = scp->device; 4271 struct sdebug_dev_info *devip = (struct sdebug_dev_info *)sdp->hostdata; 4272 unsigned long long i; 4273 u64 block, lbaa; 4274 u32 lb_size = sdebug_sector_size; 4275 int ret; 4276 struct sdeb_store_info *sip = devip2sip((struct sdebug_dev_info *) 4277 scp->device->hostdata, true); 4278 u8 *fs1p; 4279 u8 *fsp; 4280 4281 sdeb_write_lock(sip); 4282 4283 ret = check_device_access_params(scp, lba, num, true); 4284 if (ret) { 4285 sdeb_write_unlock(sip); 4286 return ret; 4287 } 4288 4289 if (unmap && scsi_debug_lbp()) { 4290 unmap_region(sip, lba, num); 4291 goto out; 4292 } 4293 lbaa = lba; 4294 block = do_div(lbaa, sdebug_store_sectors); 4295 /* if ndob then zero 1 logical block, else fetch 1 logical block */ 4296 fsp = sip->storep; 4297 fs1p = fsp + (block * lb_size); 4298 if (ndob) { 4299 memset(fs1p, 0, lb_size); 4300 ret = 0; 4301 } else 4302 ret = fetch_to_dev_buffer(scp, fs1p, lb_size); 4303 4304 if (-1 == ret) { 4305 sdeb_write_unlock(sip); 4306 return DID_ERROR << 16; 4307 } else if (sdebug_verbose && !ndob && (ret < lb_size)) 4308 sdev_printk(KERN_INFO, scp->device, 4309 "%s: %s: lb size=%u, IO sent=%d bytes\n", 4310 my_name, "write same", lb_size, ret); 4311 4312 /* Copy first sector to remaining blocks */ 4313 for (i = 1 ; i < num ; i++) { 4314 lbaa = lba + i; 4315 block = do_div(lbaa, sdebug_store_sectors); 4316 memmove(fsp + (block * lb_size), fs1p, lb_size); 4317 } 4318 if (scsi_debug_lbp()) 4319 map_region(sip, lba, num); 4320 /* If ZBC zone then bump its write pointer */ 4321 if (sdebug_dev_is_zoned(devip)) 4322 zbc_inc_wp(devip, lba, num); 4323 out: 4324 sdeb_write_unlock(sip); 4325 4326 return 0; 4327 } 4328 4329 static int resp_write_same_10(struct scsi_cmnd *scp, 4330 struct sdebug_dev_info *devip) 4331 { 4332 u8 *cmd = scp->cmnd; 4333 u32 lba; 4334 u16 num; 4335 u32 ei_lba = 0; 4336 bool unmap = false; 4337 4338 if (cmd[1] & 0x8) { 4339 if (sdebug_lbpws10 == 0) { 4340 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 3); 4341 return check_condition_result; 4342 } else 4343 unmap = true; 4344 } 4345 lba = get_unaligned_be32(cmd + 2); 4346 num = get_unaligned_be16(cmd + 7); 4347 if (num > sdebug_write_same_length) { 4348 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 7, -1); 4349 return check_condition_result; 4350 } 4351 return resp_write_same(scp, lba, num, ei_lba, unmap, false); 4352 } 4353 4354 static int resp_write_same_16(struct scsi_cmnd *scp, 4355 struct sdebug_dev_info *devip) 4356 { 4357 u8 *cmd = scp->cmnd; 4358 u64 lba; 4359 u32 num; 4360 u32 ei_lba = 0; 4361 bool unmap = false; 4362 bool ndob = false; 4363 4364 if (cmd[1] & 0x8) { /* UNMAP */ 4365 if (sdebug_lbpws == 0) { 4366 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 3); 4367 return check_condition_result; 4368 } else 4369 unmap = true; 4370 } 4371 if (cmd[1] & 0x1) /* NDOB (no data-out buffer, assumes zeroes) */ 4372 ndob = true; 4373 lba = get_unaligned_be64(cmd + 2); 4374 num = get_unaligned_be32(cmd + 10); 4375 if (num > sdebug_write_same_length) { 4376 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 10, -1); 4377 return check_condition_result; 4378 } 4379 return resp_write_same(scp, lba, num, ei_lba, unmap, ndob); 4380 } 4381 4382 /* Note the mode field is in the same position as the (lower) service action 4383 * field. For the Report supported operation codes command, SPC-4 suggests 4384 * each mode of this command should be reported separately; for future. */ 4385 static int resp_write_buffer(struct scsi_cmnd *scp, 4386 struct sdebug_dev_info *devip) 4387 { 4388 u8 *cmd = scp->cmnd; 4389 struct scsi_device *sdp = scp->device; 4390 struct sdebug_dev_info *dp; 4391 u8 mode; 4392 4393 mode = cmd[1] & 0x1f; 4394 switch (mode) { 4395 case 0x4: /* download microcode (MC) and activate (ACT) */ 4396 /* set UAs on this device only */ 4397 set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm); 4398 set_bit(SDEBUG_UA_MICROCODE_CHANGED, devip->uas_bm); 4399 break; 4400 case 0x5: /* download MC, save and ACT */ 4401 set_bit(SDEBUG_UA_MICROCODE_CHANGED_WO_RESET, devip->uas_bm); 4402 break; 4403 case 0x6: /* download MC with offsets and ACT */ 4404 /* set UAs on most devices (LUs) in this target */ 4405 list_for_each_entry(dp, 4406 &devip->sdbg_host->dev_info_list, 4407 dev_list) 4408 if (dp->target == sdp->id) { 4409 set_bit(SDEBUG_UA_BUS_RESET, dp->uas_bm); 4410 if (devip != dp) 4411 set_bit(SDEBUG_UA_MICROCODE_CHANGED, 4412 dp->uas_bm); 4413 } 4414 break; 4415 case 0x7: /* download MC with offsets, save, and ACT */ 4416 /* set UA on all devices (LUs) in this target */ 4417 list_for_each_entry(dp, 4418 &devip->sdbg_host->dev_info_list, 4419 dev_list) 4420 if (dp->target == sdp->id) 4421 set_bit(SDEBUG_UA_MICROCODE_CHANGED_WO_RESET, 4422 dp->uas_bm); 4423 break; 4424 default: 4425 /* do nothing for this command for other mode values */ 4426 break; 4427 } 4428 return 0; 4429 } 4430 4431 static int resp_comp_write(struct scsi_cmnd *scp, 4432 struct sdebug_dev_info *devip) 4433 { 4434 u8 *cmd = scp->cmnd; 4435 u8 *arr; 4436 struct sdeb_store_info *sip = devip2sip(devip, true); 4437 u64 lba; 4438 u32 dnum; 4439 u32 lb_size = sdebug_sector_size; 4440 u8 num; 4441 int ret; 4442 int retval = 0; 4443 4444 lba = get_unaligned_be64(cmd + 2); 4445 num = cmd[13]; /* 1 to a maximum of 255 logical blocks */ 4446 if (0 == num) 4447 return 0; /* degenerate case, not an error */ 4448 if (sdebug_dif == T10_PI_TYPE2_PROTECTION && 4449 (cmd[1] & 0xe0)) { 4450 mk_sense_invalid_opcode(scp); 4451 return check_condition_result; 4452 } 4453 if ((sdebug_dif == T10_PI_TYPE1_PROTECTION || 4454 sdebug_dif == T10_PI_TYPE3_PROTECTION) && 4455 (cmd[1] & 0xe0) == 0) 4456 sdev_printk(KERN_ERR, scp->device, "Unprotected WR " 4457 "to DIF device\n"); 4458 ret = check_device_access_params(scp, lba, num, false); 4459 if (ret) 4460 return ret; 4461 dnum = 2 * num; 4462 arr = kcalloc(lb_size, dnum, GFP_ATOMIC); 4463 if (NULL == arr) { 4464 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC, 4465 INSUFF_RES_ASCQ); 4466 return check_condition_result; 4467 } 4468 4469 sdeb_write_lock(sip); 4470 4471 ret = do_dout_fetch(scp, dnum, arr); 4472 if (ret == -1) { 4473 retval = DID_ERROR << 16; 4474 goto cleanup; 4475 } else if (sdebug_verbose && (ret < (dnum * lb_size))) 4476 sdev_printk(KERN_INFO, scp->device, "%s: compare_write: cdb " 4477 "indicated=%u, IO sent=%d bytes\n", my_name, 4478 dnum * lb_size, ret); 4479 if (!comp_write_worker(sip, lba, num, arr, false)) { 4480 mk_sense_buffer(scp, MISCOMPARE, MISCOMPARE_VERIFY_ASC, 0); 4481 retval = check_condition_result; 4482 goto cleanup; 4483 } 4484 if (scsi_debug_lbp()) 4485 map_region(sip, lba, num); 4486 cleanup: 4487 sdeb_write_unlock(sip); 4488 kfree(arr); 4489 return retval; 4490 } 4491 4492 struct unmap_block_desc { 4493 __be64 lba; 4494 __be32 blocks; 4495 __be32 __reserved; 4496 }; 4497 4498 static int resp_unmap(struct scsi_cmnd *scp, struct sdebug_dev_info *devip) 4499 { 4500 unsigned char *buf; 4501 struct unmap_block_desc *desc; 4502 struct sdeb_store_info *sip = devip2sip(devip, true); 4503 unsigned int i, payload_len, descriptors; 4504 int ret; 4505 4506 if (!scsi_debug_lbp()) 4507 return 0; /* fib and say its done */ 4508 payload_len = get_unaligned_be16(scp->cmnd + 7); 4509 BUG_ON(scsi_bufflen(scp) != payload_len); 4510 4511 descriptors = (payload_len - 8) / 16; 4512 if (descriptors > sdebug_unmap_max_desc) { 4513 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 7, -1); 4514 return check_condition_result; 4515 } 4516 4517 buf = kzalloc(scsi_bufflen(scp), GFP_ATOMIC); 4518 if (!buf) { 4519 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC, 4520 INSUFF_RES_ASCQ); 4521 return check_condition_result; 4522 } 4523 4524 scsi_sg_copy_to_buffer(scp, buf, scsi_bufflen(scp)); 4525 4526 BUG_ON(get_unaligned_be16(&buf[0]) != payload_len - 2); 4527 BUG_ON(get_unaligned_be16(&buf[2]) != descriptors * 16); 4528 4529 desc = (void *)&buf[8]; 4530 4531 sdeb_write_lock(sip); 4532 4533 for (i = 0 ; i < descriptors ; i++) { 4534 unsigned long long lba = get_unaligned_be64(&desc[i].lba); 4535 unsigned int num = get_unaligned_be32(&desc[i].blocks); 4536 4537 ret = check_device_access_params(scp, lba, num, true); 4538 if (ret) 4539 goto out; 4540 4541 unmap_region(sip, lba, num); 4542 } 4543 4544 ret = 0; 4545 4546 out: 4547 sdeb_write_unlock(sip); 4548 kfree(buf); 4549 4550 return ret; 4551 } 4552 4553 #define SDEBUG_GET_LBA_STATUS_LEN 32 4554 4555 static int resp_get_lba_status(struct scsi_cmnd *scp, 4556 struct sdebug_dev_info *devip) 4557 { 4558 u8 *cmd = scp->cmnd; 4559 u64 lba; 4560 u32 alloc_len, mapped, num; 4561 int ret; 4562 u8 arr[SDEBUG_GET_LBA_STATUS_LEN]; 4563 4564 lba = get_unaligned_be64(cmd + 2); 4565 alloc_len = get_unaligned_be32(cmd + 10); 4566 4567 if (alloc_len < 24) 4568 return 0; 4569 4570 ret = check_device_access_params(scp, lba, 1, false); 4571 if (ret) 4572 return ret; 4573 4574 if (scsi_debug_lbp()) { 4575 struct sdeb_store_info *sip = devip2sip(devip, true); 4576 4577 mapped = map_state(sip, lba, &num); 4578 } else { 4579 mapped = 1; 4580 /* following just in case virtual_gb changed */ 4581 sdebug_capacity = get_sdebug_capacity(); 4582 if (sdebug_capacity - lba <= 0xffffffff) 4583 num = sdebug_capacity - lba; 4584 else 4585 num = 0xffffffff; 4586 } 4587 4588 memset(arr, 0, SDEBUG_GET_LBA_STATUS_LEN); 4589 put_unaligned_be32(20, arr); /* Parameter Data Length */ 4590 put_unaligned_be64(lba, arr + 8); /* LBA */ 4591 put_unaligned_be32(num, arr + 16); /* Number of blocks */ 4592 arr[20] = !mapped; /* prov_stat=0: mapped; 1: dealloc */ 4593 4594 return fill_from_dev_buffer(scp, arr, SDEBUG_GET_LBA_STATUS_LEN); 4595 } 4596 4597 static int resp_get_stream_status(struct scsi_cmnd *scp, 4598 struct sdebug_dev_info *devip) 4599 { 4600 u16 starting_stream_id, stream_id; 4601 const u8 *cmd = scp->cmnd; 4602 u32 alloc_len, offset; 4603 u8 arr[256] = {}; 4604 struct scsi_stream_status_header *h = (void *)arr; 4605 4606 starting_stream_id = get_unaligned_be16(cmd + 4); 4607 alloc_len = get_unaligned_be32(cmd + 10); 4608 4609 if (alloc_len < 8) { 4610 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 10, -1); 4611 return check_condition_result; 4612 } 4613 4614 if (starting_stream_id >= MAXIMUM_NUMBER_OF_STREAMS) { 4615 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 4, -1); 4616 return check_condition_result; 4617 } 4618 4619 /* 4620 * The GET STREAM STATUS command only reports status information 4621 * about open streams. Treat the non-permanent stream as open. 4622 */ 4623 put_unaligned_be16(MAXIMUM_NUMBER_OF_STREAMS, 4624 &h->number_of_open_streams); 4625 4626 for (offset = 8, stream_id = starting_stream_id; 4627 offset + 8 <= min_t(u32, alloc_len, sizeof(arr)) && 4628 stream_id < MAXIMUM_NUMBER_OF_STREAMS; 4629 offset += 8, stream_id++) { 4630 struct scsi_stream_status *stream_status = (void *)arr + offset; 4631 4632 stream_status->perm = stream_id < PERMANENT_STREAM_COUNT; 4633 put_unaligned_be16(stream_id, 4634 &stream_status->stream_identifier); 4635 stream_status->rel_lifetime = stream_id + 1; 4636 } 4637 put_unaligned_be32(offset - 8, &h->len); /* PARAMETER DATA LENGTH */ 4638 4639 return fill_from_dev_buffer(scp, arr, min(offset, alloc_len)); 4640 } 4641 4642 static int resp_sync_cache(struct scsi_cmnd *scp, 4643 struct sdebug_dev_info *devip) 4644 { 4645 int res = 0; 4646 u64 lba; 4647 u32 num_blocks; 4648 u8 *cmd = scp->cmnd; 4649 4650 if (cmd[0] == SYNCHRONIZE_CACHE) { /* 10 byte cdb */ 4651 lba = get_unaligned_be32(cmd + 2); 4652 num_blocks = get_unaligned_be16(cmd + 7); 4653 } else { /* SYNCHRONIZE_CACHE(16) */ 4654 lba = get_unaligned_be64(cmd + 2); 4655 num_blocks = get_unaligned_be32(cmd + 10); 4656 } 4657 if (lba + num_blocks > sdebug_capacity) { 4658 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0); 4659 return check_condition_result; 4660 } 4661 if (!write_since_sync || (cmd[1] & 0x2)) 4662 res = SDEG_RES_IMMED_MASK; 4663 else /* delay if write_since_sync and IMMED clear */ 4664 write_since_sync = false; 4665 return res; 4666 } 4667 4668 /* 4669 * Assuming the LBA+num_blocks is not out-of-range, this function will return 4670 * CONDITION MET if the specified blocks will/have fitted in the cache, and 4671 * a GOOD status otherwise. Model a disk with a big cache and yield 4672 * CONDITION MET. Actually tries to bring range in main memory into the 4673 * cache associated with the CPU(s). 4674 */ 4675 static int resp_pre_fetch(struct scsi_cmnd *scp, 4676 struct sdebug_dev_info *devip) 4677 { 4678 int res = 0; 4679 u64 lba; 4680 u64 block, rest = 0; 4681 u32 nblks; 4682 u8 *cmd = scp->cmnd; 4683 struct sdeb_store_info *sip = devip2sip(devip, true); 4684 u8 *fsp = sip->storep; 4685 4686 if (cmd[0] == PRE_FETCH) { /* 10 byte cdb */ 4687 lba = get_unaligned_be32(cmd + 2); 4688 nblks = get_unaligned_be16(cmd + 7); 4689 } else { /* PRE-FETCH(16) */ 4690 lba = get_unaligned_be64(cmd + 2); 4691 nblks = get_unaligned_be32(cmd + 10); 4692 } 4693 if (lba + nblks > sdebug_capacity) { 4694 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0); 4695 return check_condition_result; 4696 } 4697 if (!fsp) 4698 goto fini; 4699 /* PRE-FETCH spec says nothing about LBP or PI so skip them */ 4700 block = do_div(lba, sdebug_store_sectors); 4701 if (block + nblks > sdebug_store_sectors) 4702 rest = block + nblks - sdebug_store_sectors; 4703 4704 /* Try to bring the PRE-FETCH range into CPU's cache */ 4705 sdeb_read_lock(sip); 4706 prefetch_range(fsp + (sdebug_sector_size * block), 4707 (nblks - rest) * sdebug_sector_size); 4708 if (rest) 4709 prefetch_range(fsp, rest * sdebug_sector_size); 4710 sdeb_read_unlock(sip); 4711 fini: 4712 if (cmd[1] & 0x2) 4713 res = SDEG_RES_IMMED_MASK; 4714 return res | condition_met_result; 4715 } 4716 4717 #define RL_BUCKET_ELEMS 8 4718 4719 /* Even though each pseudo target has a REPORT LUNS "well known logical unit" 4720 * (W-LUN), the normal Linux scanning logic does not associate it with a 4721 * device (e.g. /dev/sg7). The following magic will make that association: 4722 * "cd /sys/class/scsi_host/host<n> ; echo '- - 49409' > scan" 4723 * where <n> is a host number. If there are multiple targets in a host then 4724 * the above will associate a W-LUN to each target. To only get a W-LUN 4725 * for target 2, then use "echo '- 2 49409' > scan" . 4726 */ 4727 static int resp_report_luns(struct scsi_cmnd *scp, 4728 struct sdebug_dev_info *devip) 4729 { 4730 unsigned char *cmd = scp->cmnd; 4731 unsigned int alloc_len; 4732 unsigned char select_report; 4733 u64 lun; 4734 struct scsi_lun *lun_p; 4735 u8 arr[RL_BUCKET_ELEMS * sizeof(struct scsi_lun)]; 4736 unsigned int lun_cnt; /* normal LUN count (max: 256) */ 4737 unsigned int wlun_cnt; /* report luns W-LUN count */ 4738 unsigned int tlun_cnt; /* total LUN count */ 4739 unsigned int rlen; /* response length (in bytes) */ 4740 int k, j, n, res; 4741 unsigned int off_rsp = 0; 4742 const int sz_lun = sizeof(struct scsi_lun); 4743 4744 clear_luns_changed_on_target(devip); 4745 4746 select_report = cmd[2]; 4747 alloc_len = get_unaligned_be32(cmd + 6); 4748 4749 if (alloc_len < 4) { 4750 pr_err("alloc len too small %d\n", alloc_len); 4751 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 6, -1); 4752 return check_condition_result; 4753 } 4754 4755 switch (select_report) { 4756 case 0: /* all LUNs apart from W-LUNs */ 4757 lun_cnt = sdebug_max_luns; 4758 wlun_cnt = 0; 4759 break; 4760 case 1: /* only W-LUNs */ 4761 lun_cnt = 0; 4762 wlun_cnt = 1; 4763 break; 4764 case 2: /* all LUNs */ 4765 lun_cnt = sdebug_max_luns; 4766 wlun_cnt = 1; 4767 break; 4768 case 0x10: /* only administrative LUs */ 4769 case 0x11: /* see SPC-5 */ 4770 case 0x12: /* only subsiduary LUs owned by referenced LU */ 4771 default: 4772 pr_debug("select report invalid %d\n", select_report); 4773 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, -1); 4774 return check_condition_result; 4775 } 4776 4777 if (sdebug_no_lun_0 && (lun_cnt > 0)) 4778 --lun_cnt; 4779 4780 tlun_cnt = lun_cnt + wlun_cnt; 4781 rlen = tlun_cnt * sz_lun; /* excluding 8 byte header */ 4782 scsi_set_resid(scp, scsi_bufflen(scp)); 4783 pr_debug("select_report %d luns = %d wluns = %d no_lun0 %d\n", 4784 select_report, lun_cnt, wlun_cnt, sdebug_no_lun_0); 4785 4786 /* loops rely on sizeof response header same as sizeof lun (both 8) */ 4787 lun = sdebug_no_lun_0 ? 1 : 0; 4788 for (k = 0, j = 0, res = 0; true; ++k, j = 0) { 4789 memset(arr, 0, sizeof(arr)); 4790 lun_p = (struct scsi_lun *)&arr[0]; 4791 if (k == 0) { 4792 put_unaligned_be32(rlen, &arr[0]); 4793 ++lun_p; 4794 j = 1; 4795 } 4796 for ( ; j < RL_BUCKET_ELEMS; ++j, ++lun_p) { 4797 if ((k * RL_BUCKET_ELEMS) + j > lun_cnt) 4798 break; 4799 int_to_scsilun(lun++, lun_p); 4800 if (lun > 1 && sdebug_lun_am == SAM_LUN_AM_FLAT) 4801 lun_p->scsi_lun[0] |= 0x40; 4802 } 4803 if (j < RL_BUCKET_ELEMS) 4804 break; 4805 n = j * sz_lun; 4806 res = p_fill_from_dev_buffer(scp, arr, n, off_rsp); 4807 if (res) 4808 return res; 4809 off_rsp += n; 4810 } 4811 if (wlun_cnt) { 4812 int_to_scsilun(SCSI_W_LUN_REPORT_LUNS, lun_p); 4813 ++j; 4814 } 4815 if (j > 0) 4816 res = p_fill_from_dev_buffer(scp, arr, j * sz_lun, off_rsp); 4817 return res; 4818 } 4819 4820 static int resp_verify(struct scsi_cmnd *scp, struct sdebug_dev_info *devip) 4821 { 4822 bool is_bytchk3 = false; 4823 u8 bytchk; 4824 int ret, j; 4825 u32 vnum, a_num, off; 4826 const u32 lb_size = sdebug_sector_size; 4827 u64 lba; 4828 u8 *arr; 4829 u8 *cmd = scp->cmnd; 4830 struct sdeb_store_info *sip = devip2sip(devip, true); 4831 4832 bytchk = (cmd[1] >> 1) & 0x3; 4833 if (bytchk == 0) { 4834 return 0; /* always claim internal verify okay */ 4835 } else if (bytchk == 2) { 4836 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 2); 4837 return check_condition_result; 4838 } else if (bytchk == 3) { 4839 is_bytchk3 = true; /* 1 block sent, compared repeatedly */ 4840 } 4841 switch (cmd[0]) { 4842 case VERIFY_16: 4843 lba = get_unaligned_be64(cmd + 2); 4844 vnum = get_unaligned_be32(cmd + 10); 4845 break; 4846 case VERIFY: /* is VERIFY(10) */ 4847 lba = get_unaligned_be32(cmd + 2); 4848 vnum = get_unaligned_be16(cmd + 7); 4849 break; 4850 default: 4851 mk_sense_invalid_opcode(scp); 4852 return check_condition_result; 4853 } 4854 if (vnum == 0) 4855 return 0; /* not an error */ 4856 a_num = is_bytchk3 ? 1 : vnum; 4857 /* Treat following check like one for read (i.e. no write) access */ 4858 ret = check_device_access_params(scp, lba, a_num, false); 4859 if (ret) 4860 return ret; 4861 4862 arr = kcalloc(lb_size, vnum, GFP_ATOMIC | __GFP_NOWARN); 4863 if (!arr) { 4864 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC, 4865 INSUFF_RES_ASCQ); 4866 return check_condition_result; 4867 } 4868 /* Not changing store, so only need read access */ 4869 sdeb_read_lock(sip); 4870 4871 ret = do_dout_fetch(scp, a_num, arr); 4872 if (ret == -1) { 4873 ret = DID_ERROR << 16; 4874 goto cleanup; 4875 } else if (sdebug_verbose && (ret < (a_num * lb_size))) { 4876 sdev_printk(KERN_INFO, scp->device, 4877 "%s: %s: cdb indicated=%u, IO sent=%d bytes\n", 4878 my_name, __func__, a_num * lb_size, ret); 4879 } 4880 if (is_bytchk3) { 4881 for (j = 1, off = lb_size; j < vnum; ++j, off += lb_size) 4882 memcpy(arr + off, arr, lb_size); 4883 } 4884 ret = 0; 4885 if (!comp_write_worker(sip, lba, vnum, arr, true)) { 4886 mk_sense_buffer(scp, MISCOMPARE, MISCOMPARE_VERIFY_ASC, 0); 4887 ret = check_condition_result; 4888 goto cleanup; 4889 } 4890 cleanup: 4891 sdeb_read_unlock(sip); 4892 kfree(arr); 4893 return ret; 4894 } 4895 4896 #define RZONES_DESC_HD 64 4897 4898 /* Report zones depending on start LBA and reporting options */ 4899 static int resp_report_zones(struct scsi_cmnd *scp, 4900 struct sdebug_dev_info *devip) 4901 { 4902 unsigned int rep_max_zones, nrz = 0; 4903 int ret = 0; 4904 u32 alloc_len, rep_opts, rep_len; 4905 bool partial; 4906 u64 lba, zs_lba; 4907 u8 *arr = NULL, *desc; 4908 u8 *cmd = scp->cmnd; 4909 struct sdeb_zone_state *zsp = NULL; 4910 struct sdeb_store_info *sip = devip2sip(devip, false); 4911 4912 if (!sdebug_dev_is_zoned(devip)) { 4913 mk_sense_invalid_opcode(scp); 4914 return check_condition_result; 4915 } 4916 zs_lba = get_unaligned_be64(cmd + 2); 4917 alloc_len = get_unaligned_be32(cmd + 10); 4918 if (alloc_len == 0) 4919 return 0; /* not an error */ 4920 rep_opts = cmd[14] & 0x3f; 4921 partial = cmd[14] & 0x80; 4922 4923 if (zs_lba >= sdebug_capacity) { 4924 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0); 4925 return check_condition_result; 4926 } 4927 4928 rep_max_zones = (alloc_len - 64) >> ilog2(RZONES_DESC_HD); 4929 4930 arr = kzalloc(alloc_len, GFP_ATOMIC | __GFP_NOWARN); 4931 if (!arr) { 4932 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC, 4933 INSUFF_RES_ASCQ); 4934 return check_condition_result; 4935 } 4936 4937 sdeb_read_lock(sip); 4938 4939 desc = arr + 64; 4940 for (lba = zs_lba; lba < sdebug_capacity; 4941 lba = zsp->z_start + zsp->z_size) { 4942 if (WARN_ONCE(zbc_zone(devip, lba) == zsp, "lba = %llu\n", lba)) 4943 break; 4944 zsp = zbc_zone(devip, lba); 4945 switch (rep_opts) { 4946 case 0x00: 4947 /* All zones */ 4948 break; 4949 case 0x01: 4950 /* Empty zones */ 4951 if (zsp->z_cond != ZC1_EMPTY) 4952 continue; 4953 break; 4954 case 0x02: 4955 /* Implicit open zones */ 4956 if (zsp->z_cond != ZC2_IMPLICIT_OPEN) 4957 continue; 4958 break; 4959 case 0x03: 4960 /* Explicit open zones */ 4961 if (zsp->z_cond != ZC3_EXPLICIT_OPEN) 4962 continue; 4963 break; 4964 case 0x04: 4965 /* Closed zones */ 4966 if (zsp->z_cond != ZC4_CLOSED) 4967 continue; 4968 break; 4969 case 0x05: 4970 /* Full zones */ 4971 if (zsp->z_cond != ZC5_FULL) 4972 continue; 4973 break; 4974 case 0x06: 4975 case 0x07: 4976 case 0x10: 4977 /* 4978 * Read-only, offline, reset WP recommended are 4979 * not emulated: no zones to report; 4980 */ 4981 continue; 4982 case 0x11: 4983 /* non-seq-resource set */ 4984 if (!zsp->z_non_seq_resource) 4985 continue; 4986 break; 4987 case 0x3e: 4988 /* All zones except gap zones. */ 4989 if (zbc_zone_is_gap(zsp)) 4990 continue; 4991 break; 4992 case 0x3f: 4993 /* Not write pointer (conventional) zones */ 4994 if (zbc_zone_is_seq(zsp)) 4995 continue; 4996 break; 4997 default: 4998 mk_sense_buffer(scp, ILLEGAL_REQUEST, 4999 INVALID_FIELD_IN_CDB, 0); 5000 ret = check_condition_result; 5001 goto fini; 5002 } 5003 5004 if (nrz < rep_max_zones) { 5005 /* Fill zone descriptor */ 5006 desc[0] = zsp->z_type; 5007 desc[1] = zsp->z_cond << 4; 5008 if (zsp->z_non_seq_resource) 5009 desc[1] |= 1 << 1; 5010 put_unaligned_be64((u64)zsp->z_size, desc + 8); 5011 put_unaligned_be64((u64)zsp->z_start, desc + 16); 5012 put_unaligned_be64((u64)zsp->z_wp, desc + 24); 5013 desc += 64; 5014 } 5015 5016 if (partial && nrz >= rep_max_zones) 5017 break; 5018 5019 nrz++; 5020 } 5021 5022 /* Report header */ 5023 /* Zone list length. */ 5024 put_unaligned_be32(nrz * RZONES_DESC_HD, arr + 0); 5025 /* Maximum LBA */ 5026 put_unaligned_be64(sdebug_capacity - 1, arr + 8); 5027 /* Zone starting LBA granularity. */ 5028 if (devip->zcap < devip->zsize) 5029 put_unaligned_be64(devip->zsize, arr + 16); 5030 5031 rep_len = (unsigned long)desc - (unsigned long)arr; 5032 ret = fill_from_dev_buffer(scp, arr, min_t(u32, alloc_len, rep_len)); 5033 5034 fini: 5035 sdeb_read_unlock(sip); 5036 kfree(arr); 5037 return ret; 5038 } 5039 5040 /* Logic transplanted from tcmu-runner, file_zbc.c */ 5041 static void zbc_open_all(struct sdebug_dev_info *devip) 5042 { 5043 struct sdeb_zone_state *zsp = &devip->zstate[0]; 5044 unsigned int i; 5045 5046 for (i = 0; i < devip->nr_zones; i++, zsp++) { 5047 if (zsp->z_cond == ZC4_CLOSED) 5048 zbc_open_zone(devip, &devip->zstate[i], true); 5049 } 5050 } 5051 5052 static int resp_open_zone(struct scsi_cmnd *scp, struct sdebug_dev_info *devip) 5053 { 5054 int res = 0; 5055 u64 z_id; 5056 enum sdebug_z_cond zc; 5057 u8 *cmd = scp->cmnd; 5058 struct sdeb_zone_state *zsp; 5059 bool all = cmd[14] & 0x01; 5060 struct sdeb_store_info *sip = devip2sip(devip, false); 5061 5062 if (!sdebug_dev_is_zoned(devip)) { 5063 mk_sense_invalid_opcode(scp); 5064 return check_condition_result; 5065 } 5066 5067 sdeb_write_lock(sip); 5068 5069 if (all) { 5070 /* Check if all closed zones can be open */ 5071 if (devip->max_open && 5072 devip->nr_exp_open + devip->nr_closed > devip->max_open) { 5073 mk_sense_buffer(scp, DATA_PROTECT, INSUFF_RES_ASC, 5074 INSUFF_ZONE_ASCQ); 5075 res = check_condition_result; 5076 goto fini; 5077 } 5078 /* Open all closed zones */ 5079 zbc_open_all(devip); 5080 goto fini; 5081 } 5082 5083 /* Open the specified zone */ 5084 z_id = get_unaligned_be64(cmd + 2); 5085 if (z_id >= sdebug_capacity) { 5086 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0); 5087 res = check_condition_result; 5088 goto fini; 5089 } 5090 5091 zsp = zbc_zone(devip, z_id); 5092 if (z_id != zsp->z_start) { 5093 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0); 5094 res = check_condition_result; 5095 goto fini; 5096 } 5097 if (zbc_zone_is_conv(zsp)) { 5098 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0); 5099 res = check_condition_result; 5100 goto fini; 5101 } 5102 5103 zc = zsp->z_cond; 5104 if (zc == ZC3_EXPLICIT_OPEN || zc == ZC5_FULL) 5105 goto fini; 5106 5107 if (devip->max_open && devip->nr_exp_open >= devip->max_open) { 5108 mk_sense_buffer(scp, DATA_PROTECT, INSUFF_RES_ASC, 5109 INSUFF_ZONE_ASCQ); 5110 res = check_condition_result; 5111 goto fini; 5112 } 5113 5114 zbc_open_zone(devip, zsp, true); 5115 fini: 5116 sdeb_write_unlock(sip); 5117 return res; 5118 } 5119 5120 static void zbc_close_all(struct sdebug_dev_info *devip) 5121 { 5122 unsigned int i; 5123 5124 for (i = 0; i < devip->nr_zones; i++) 5125 zbc_close_zone(devip, &devip->zstate[i]); 5126 } 5127 5128 static int resp_close_zone(struct scsi_cmnd *scp, 5129 struct sdebug_dev_info *devip) 5130 { 5131 int res = 0; 5132 u64 z_id; 5133 u8 *cmd = scp->cmnd; 5134 struct sdeb_zone_state *zsp; 5135 bool all = cmd[14] & 0x01; 5136 struct sdeb_store_info *sip = devip2sip(devip, false); 5137 5138 if (!sdebug_dev_is_zoned(devip)) { 5139 mk_sense_invalid_opcode(scp); 5140 return check_condition_result; 5141 } 5142 5143 sdeb_write_lock(sip); 5144 5145 if (all) { 5146 zbc_close_all(devip); 5147 goto fini; 5148 } 5149 5150 /* Close specified zone */ 5151 z_id = get_unaligned_be64(cmd + 2); 5152 if (z_id >= sdebug_capacity) { 5153 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0); 5154 res = check_condition_result; 5155 goto fini; 5156 } 5157 5158 zsp = zbc_zone(devip, z_id); 5159 if (z_id != zsp->z_start) { 5160 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0); 5161 res = check_condition_result; 5162 goto fini; 5163 } 5164 if (zbc_zone_is_conv(zsp)) { 5165 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0); 5166 res = check_condition_result; 5167 goto fini; 5168 } 5169 5170 zbc_close_zone(devip, zsp); 5171 fini: 5172 sdeb_write_unlock(sip); 5173 return res; 5174 } 5175 5176 static void zbc_finish_zone(struct sdebug_dev_info *devip, 5177 struct sdeb_zone_state *zsp, bool empty) 5178 { 5179 enum sdebug_z_cond zc = zsp->z_cond; 5180 5181 if (zc == ZC4_CLOSED || zc == ZC2_IMPLICIT_OPEN || 5182 zc == ZC3_EXPLICIT_OPEN || (empty && zc == ZC1_EMPTY)) { 5183 if (zc == ZC2_IMPLICIT_OPEN || zc == ZC3_EXPLICIT_OPEN) 5184 zbc_close_zone(devip, zsp); 5185 if (zsp->z_cond == ZC4_CLOSED) 5186 devip->nr_closed--; 5187 zsp->z_wp = zsp->z_start + zsp->z_size; 5188 zsp->z_cond = ZC5_FULL; 5189 } 5190 } 5191 5192 static void zbc_finish_all(struct sdebug_dev_info *devip) 5193 { 5194 unsigned int i; 5195 5196 for (i = 0; i < devip->nr_zones; i++) 5197 zbc_finish_zone(devip, &devip->zstate[i], false); 5198 } 5199 5200 static int resp_finish_zone(struct scsi_cmnd *scp, 5201 struct sdebug_dev_info *devip) 5202 { 5203 struct sdeb_zone_state *zsp; 5204 int res = 0; 5205 u64 z_id; 5206 u8 *cmd = scp->cmnd; 5207 bool all = cmd[14] & 0x01; 5208 struct sdeb_store_info *sip = devip2sip(devip, false); 5209 5210 if (!sdebug_dev_is_zoned(devip)) { 5211 mk_sense_invalid_opcode(scp); 5212 return check_condition_result; 5213 } 5214 5215 sdeb_write_lock(sip); 5216 5217 if (all) { 5218 zbc_finish_all(devip); 5219 goto fini; 5220 } 5221 5222 /* Finish the specified zone */ 5223 z_id = get_unaligned_be64(cmd + 2); 5224 if (z_id >= sdebug_capacity) { 5225 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0); 5226 res = check_condition_result; 5227 goto fini; 5228 } 5229 5230 zsp = zbc_zone(devip, z_id); 5231 if (z_id != zsp->z_start) { 5232 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0); 5233 res = check_condition_result; 5234 goto fini; 5235 } 5236 if (zbc_zone_is_conv(zsp)) { 5237 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0); 5238 res = check_condition_result; 5239 goto fini; 5240 } 5241 5242 zbc_finish_zone(devip, zsp, true); 5243 fini: 5244 sdeb_write_unlock(sip); 5245 return res; 5246 } 5247 5248 static void zbc_rwp_zone(struct sdebug_dev_info *devip, 5249 struct sdeb_zone_state *zsp) 5250 { 5251 enum sdebug_z_cond zc; 5252 struct sdeb_store_info *sip = devip2sip(devip, false); 5253 5254 if (!zbc_zone_is_seq(zsp)) 5255 return; 5256 5257 zc = zsp->z_cond; 5258 if (zc == ZC2_IMPLICIT_OPEN || zc == ZC3_EXPLICIT_OPEN) 5259 zbc_close_zone(devip, zsp); 5260 5261 if (zsp->z_cond == ZC4_CLOSED) 5262 devip->nr_closed--; 5263 5264 if (zsp->z_wp > zsp->z_start) 5265 memset(sip->storep + zsp->z_start * sdebug_sector_size, 0, 5266 (zsp->z_wp - zsp->z_start) * sdebug_sector_size); 5267 5268 zsp->z_non_seq_resource = false; 5269 zsp->z_wp = zsp->z_start; 5270 zsp->z_cond = ZC1_EMPTY; 5271 } 5272 5273 static void zbc_rwp_all(struct sdebug_dev_info *devip) 5274 { 5275 unsigned int i; 5276 5277 for (i = 0; i < devip->nr_zones; i++) 5278 zbc_rwp_zone(devip, &devip->zstate[i]); 5279 } 5280 5281 static int resp_rwp_zone(struct scsi_cmnd *scp, struct sdebug_dev_info *devip) 5282 { 5283 struct sdeb_zone_state *zsp; 5284 int res = 0; 5285 u64 z_id; 5286 u8 *cmd = scp->cmnd; 5287 bool all = cmd[14] & 0x01; 5288 struct sdeb_store_info *sip = devip2sip(devip, false); 5289 5290 if (!sdebug_dev_is_zoned(devip)) { 5291 mk_sense_invalid_opcode(scp); 5292 return check_condition_result; 5293 } 5294 5295 sdeb_write_lock(sip); 5296 5297 if (all) { 5298 zbc_rwp_all(devip); 5299 goto fini; 5300 } 5301 5302 z_id = get_unaligned_be64(cmd + 2); 5303 if (z_id >= sdebug_capacity) { 5304 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0); 5305 res = check_condition_result; 5306 goto fini; 5307 } 5308 5309 zsp = zbc_zone(devip, z_id); 5310 if (z_id != zsp->z_start) { 5311 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0); 5312 res = check_condition_result; 5313 goto fini; 5314 } 5315 if (zbc_zone_is_conv(zsp)) { 5316 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0); 5317 res = check_condition_result; 5318 goto fini; 5319 } 5320 5321 zbc_rwp_zone(devip, zsp); 5322 fini: 5323 sdeb_write_unlock(sip); 5324 return res; 5325 } 5326 5327 static u32 get_tag(struct scsi_cmnd *cmnd) 5328 { 5329 return blk_mq_unique_tag(scsi_cmd_to_rq(cmnd)); 5330 } 5331 5332 /* Queued (deferred) command completions converge here. */ 5333 static void sdebug_q_cmd_complete(struct sdebug_defer *sd_dp) 5334 { 5335 struct sdebug_queued_cmd *sqcp = container_of(sd_dp, struct sdebug_queued_cmd, sd_dp); 5336 unsigned long flags; 5337 struct scsi_cmnd *scp = sqcp->scmd; 5338 struct sdebug_scsi_cmd *sdsc; 5339 bool aborted; 5340 5341 if (sdebug_statistics) { 5342 atomic_inc(&sdebug_completions); 5343 if (raw_smp_processor_id() != sd_dp->issuing_cpu) 5344 atomic_inc(&sdebug_miss_cpus); 5345 } 5346 5347 if (!scp) { 5348 pr_err("scmd=NULL\n"); 5349 goto out; 5350 } 5351 5352 sdsc = scsi_cmd_priv(scp); 5353 spin_lock_irqsave(&sdsc->lock, flags); 5354 aborted = sd_dp->aborted; 5355 if (unlikely(aborted)) 5356 sd_dp->aborted = false; 5357 ASSIGN_QUEUED_CMD(scp, NULL); 5358 5359 spin_unlock_irqrestore(&sdsc->lock, flags); 5360 5361 if (aborted) { 5362 pr_info("bypassing scsi_done() due to aborted cmd, kicking-off EH\n"); 5363 blk_abort_request(scsi_cmd_to_rq(scp)); 5364 goto out; 5365 } 5366 5367 scsi_done(scp); /* callback to mid level */ 5368 out: 5369 sdebug_free_queued_cmd(sqcp); 5370 } 5371 5372 /* When high resolution timer goes off this function is called. */ 5373 static enum hrtimer_restart sdebug_q_cmd_hrt_complete(struct hrtimer *timer) 5374 { 5375 struct sdebug_defer *sd_dp = container_of(timer, struct sdebug_defer, 5376 hrt); 5377 sdebug_q_cmd_complete(sd_dp); 5378 return HRTIMER_NORESTART; 5379 } 5380 5381 /* When work queue schedules work, it calls this function. */ 5382 static void sdebug_q_cmd_wq_complete(struct work_struct *work) 5383 { 5384 struct sdebug_defer *sd_dp = container_of(work, struct sdebug_defer, 5385 ew.work); 5386 sdebug_q_cmd_complete(sd_dp); 5387 } 5388 5389 static bool got_shared_uuid; 5390 static uuid_t shared_uuid; 5391 5392 static int sdebug_device_create_zones(struct sdebug_dev_info *devip) 5393 { 5394 struct sdeb_zone_state *zsp; 5395 sector_t capacity = get_sdebug_capacity(); 5396 sector_t conv_capacity; 5397 sector_t zstart = 0; 5398 unsigned int i; 5399 5400 /* 5401 * Set the zone size: if sdeb_zbc_zone_size_mb is not set, figure out 5402 * a zone size allowing for at least 4 zones on the device. Otherwise, 5403 * use the specified zone size checking that at least 2 zones can be 5404 * created for the device. 5405 */ 5406 if (!sdeb_zbc_zone_size_mb) { 5407 devip->zsize = (DEF_ZBC_ZONE_SIZE_MB * SZ_1M) 5408 >> ilog2(sdebug_sector_size); 5409 while (capacity < devip->zsize << 2 && devip->zsize >= 2) 5410 devip->zsize >>= 1; 5411 if (devip->zsize < 2) { 5412 pr_err("Device capacity too small\n"); 5413 return -EINVAL; 5414 } 5415 } else { 5416 if (!is_power_of_2(sdeb_zbc_zone_size_mb)) { 5417 pr_err("Zone size is not a power of 2\n"); 5418 return -EINVAL; 5419 } 5420 devip->zsize = (sdeb_zbc_zone_size_mb * SZ_1M) 5421 >> ilog2(sdebug_sector_size); 5422 if (devip->zsize >= capacity) { 5423 pr_err("Zone size too large for device capacity\n"); 5424 return -EINVAL; 5425 } 5426 } 5427 5428 devip->zsize_shift = ilog2(devip->zsize); 5429 devip->nr_zones = (capacity + devip->zsize - 1) >> devip->zsize_shift; 5430 5431 if (sdeb_zbc_zone_cap_mb == 0) { 5432 devip->zcap = devip->zsize; 5433 } else { 5434 devip->zcap = (sdeb_zbc_zone_cap_mb * SZ_1M) >> 5435 ilog2(sdebug_sector_size); 5436 if (devip->zcap > devip->zsize) { 5437 pr_err("Zone capacity too large\n"); 5438 return -EINVAL; 5439 } 5440 } 5441 5442 conv_capacity = (sector_t)sdeb_zbc_nr_conv << devip->zsize_shift; 5443 if (conv_capacity >= capacity) { 5444 pr_err("Number of conventional zones too large\n"); 5445 return -EINVAL; 5446 } 5447 devip->nr_conv_zones = sdeb_zbc_nr_conv; 5448 devip->nr_seq_zones = ALIGN(capacity - conv_capacity, devip->zsize) >> 5449 devip->zsize_shift; 5450 devip->nr_zones = devip->nr_conv_zones + devip->nr_seq_zones; 5451 5452 /* Add gap zones if zone capacity is smaller than the zone size */ 5453 if (devip->zcap < devip->zsize) 5454 devip->nr_zones += devip->nr_seq_zones; 5455 5456 if (devip->zoned) { 5457 /* zbc_max_open_zones can be 0, meaning "not reported" */ 5458 if (sdeb_zbc_max_open >= devip->nr_zones - 1) 5459 devip->max_open = (devip->nr_zones - 1) / 2; 5460 else 5461 devip->max_open = sdeb_zbc_max_open; 5462 } 5463 5464 devip->zstate = kcalloc(devip->nr_zones, 5465 sizeof(struct sdeb_zone_state), GFP_KERNEL); 5466 if (!devip->zstate) 5467 return -ENOMEM; 5468 5469 for (i = 0; i < devip->nr_zones; i++) { 5470 zsp = &devip->zstate[i]; 5471 5472 zsp->z_start = zstart; 5473 5474 if (i < devip->nr_conv_zones) { 5475 zsp->z_type = ZBC_ZTYPE_CNV; 5476 zsp->z_cond = ZBC_NOT_WRITE_POINTER; 5477 zsp->z_wp = (sector_t)-1; 5478 zsp->z_size = 5479 min_t(u64, devip->zsize, capacity - zstart); 5480 } else if ((zstart & (devip->zsize - 1)) == 0) { 5481 if (devip->zoned) 5482 zsp->z_type = ZBC_ZTYPE_SWR; 5483 else 5484 zsp->z_type = ZBC_ZTYPE_SWP; 5485 zsp->z_cond = ZC1_EMPTY; 5486 zsp->z_wp = zsp->z_start; 5487 zsp->z_size = 5488 min_t(u64, devip->zcap, capacity - zstart); 5489 } else { 5490 zsp->z_type = ZBC_ZTYPE_GAP; 5491 zsp->z_cond = ZBC_NOT_WRITE_POINTER; 5492 zsp->z_wp = (sector_t)-1; 5493 zsp->z_size = min_t(u64, devip->zsize - devip->zcap, 5494 capacity - zstart); 5495 } 5496 5497 WARN_ON_ONCE((int)zsp->z_size <= 0); 5498 zstart += zsp->z_size; 5499 } 5500 5501 return 0; 5502 } 5503 5504 static struct sdebug_dev_info *sdebug_device_create( 5505 struct sdebug_host_info *sdbg_host, gfp_t flags) 5506 { 5507 struct sdebug_dev_info *devip; 5508 5509 devip = kzalloc(sizeof(*devip), flags); 5510 if (devip) { 5511 if (sdebug_uuid_ctl == 1) 5512 uuid_gen(&devip->lu_name); 5513 else if (sdebug_uuid_ctl == 2) { 5514 if (got_shared_uuid) 5515 devip->lu_name = shared_uuid; 5516 else { 5517 uuid_gen(&shared_uuid); 5518 got_shared_uuid = true; 5519 devip->lu_name = shared_uuid; 5520 } 5521 } 5522 devip->sdbg_host = sdbg_host; 5523 if (sdeb_zbc_in_use) { 5524 devip->zoned = sdeb_zbc_model == BLK_ZONED_HM; 5525 if (sdebug_device_create_zones(devip)) { 5526 kfree(devip); 5527 return NULL; 5528 } 5529 } else { 5530 devip->zoned = false; 5531 } 5532 devip->create_ts = ktime_get_boottime(); 5533 atomic_set(&devip->stopped, (sdeb_tur_ms_to_ready > 0 ? 2 : 0)); 5534 spin_lock_init(&devip->list_lock); 5535 INIT_LIST_HEAD(&devip->inject_err_list); 5536 list_add_tail(&devip->dev_list, &sdbg_host->dev_info_list); 5537 } 5538 return devip; 5539 } 5540 5541 static struct sdebug_dev_info *find_build_dev_info(struct scsi_device *sdev) 5542 { 5543 struct sdebug_host_info *sdbg_host; 5544 struct sdebug_dev_info *open_devip = NULL; 5545 struct sdebug_dev_info *devip; 5546 5547 sdbg_host = shost_to_sdebug_host(sdev->host); 5548 5549 list_for_each_entry(devip, &sdbg_host->dev_info_list, dev_list) { 5550 if ((devip->used) && (devip->channel == sdev->channel) && 5551 (devip->target == sdev->id) && 5552 (devip->lun == sdev->lun)) 5553 return devip; 5554 else { 5555 if ((!devip->used) && (!open_devip)) 5556 open_devip = devip; 5557 } 5558 } 5559 if (!open_devip) { /* try and make a new one */ 5560 open_devip = sdebug_device_create(sdbg_host, GFP_ATOMIC); 5561 if (!open_devip) { 5562 pr_err("out of memory at line %d\n", __LINE__); 5563 return NULL; 5564 } 5565 } 5566 5567 open_devip->channel = sdev->channel; 5568 open_devip->target = sdev->id; 5569 open_devip->lun = sdev->lun; 5570 open_devip->sdbg_host = sdbg_host; 5571 set_bit(SDEBUG_UA_POOCCUR, open_devip->uas_bm); 5572 open_devip->used = true; 5573 return open_devip; 5574 } 5575 5576 static int scsi_debug_slave_alloc(struct scsi_device *sdp) 5577 { 5578 if (sdebug_verbose) 5579 pr_info("slave_alloc <%u %u %u %llu>\n", 5580 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun); 5581 5582 return 0; 5583 } 5584 5585 static int scsi_debug_slave_configure(struct scsi_device *sdp) 5586 { 5587 struct sdebug_dev_info *devip = 5588 (struct sdebug_dev_info *)sdp->hostdata; 5589 struct dentry *dentry; 5590 5591 if (sdebug_verbose) 5592 pr_info("slave_configure <%u %u %u %llu>\n", 5593 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun); 5594 if (sdp->host->max_cmd_len != SDEBUG_MAX_CMD_LEN) 5595 sdp->host->max_cmd_len = SDEBUG_MAX_CMD_LEN; 5596 if (devip == NULL) { 5597 devip = find_build_dev_info(sdp); 5598 if (devip == NULL) 5599 return 1; /* no resources, will be marked offline */ 5600 } 5601 sdp->hostdata = devip; 5602 if (sdebug_no_uld) 5603 sdp->no_uld_attach = 1; 5604 config_cdb_len(sdp); 5605 5606 if (sdebug_allow_restart) 5607 sdp->allow_restart = 1; 5608 5609 devip->debugfs_entry = debugfs_create_dir(dev_name(&sdp->sdev_dev), 5610 sdebug_debugfs_root); 5611 if (IS_ERR_OR_NULL(devip->debugfs_entry)) 5612 pr_info("%s: failed to create debugfs directory for device %s\n", 5613 __func__, dev_name(&sdp->sdev_gendev)); 5614 5615 dentry = debugfs_create_file("error", 0600, devip->debugfs_entry, sdp, 5616 &sdebug_error_fops); 5617 if (IS_ERR_OR_NULL(dentry)) 5618 pr_info("%s: failed to create error file for device %s\n", 5619 __func__, dev_name(&sdp->sdev_gendev)); 5620 5621 return 0; 5622 } 5623 5624 static void scsi_debug_slave_destroy(struct scsi_device *sdp) 5625 { 5626 struct sdebug_dev_info *devip = 5627 (struct sdebug_dev_info *)sdp->hostdata; 5628 struct sdebug_err_inject *err; 5629 5630 if (sdebug_verbose) 5631 pr_info("slave_destroy <%u %u %u %llu>\n", 5632 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun); 5633 5634 if (!devip) 5635 return; 5636 5637 spin_lock(&devip->list_lock); 5638 list_for_each_entry_rcu(err, &devip->inject_err_list, list) { 5639 list_del_rcu(&err->list); 5640 call_rcu(&err->rcu, sdebug_err_free); 5641 } 5642 spin_unlock(&devip->list_lock); 5643 5644 debugfs_remove(devip->debugfs_entry); 5645 5646 /* make this slot available for re-use */ 5647 devip->used = false; 5648 sdp->hostdata = NULL; 5649 } 5650 5651 /* Returns true if we require the queued memory to be freed by the caller. */ 5652 static bool stop_qc_helper(struct sdebug_defer *sd_dp, 5653 enum sdeb_defer_type defer_t) 5654 { 5655 if (defer_t == SDEB_DEFER_HRT) { 5656 int res = hrtimer_try_to_cancel(&sd_dp->hrt); 5657 5658 switch (res) { 5659 case 0: /* Not active, it must have already run */ 5660 case -1: /* -1 It's executing the CB */ 5661 return false; 5662 case 1: /* Was active, we've now cancelled */ 5663 default: 5664 return true; 5665 } 5666 } else if (defer_t == SDEB_DEFER_WQ) { 5667 /* Cancel if pending */ 5668 if (cancel_work_sync(&sd_dp->ew.work)) 5669 return true; 5670 /* Was not pending, so it must have run */ 5671 return false; 5672 } else if (defer_t == SDEB_DEFER_POLL) { 5673 return true; 5674 } 5675 5676 return false; 5677 } 5678 5679 5680 static bool scsi_debug_stop_cmnd(struct scsi_cmnd *cmnd) 5681 { 5682 enum sdeb_defer_type l_defer_t; 5683 struct sdebug_defer *sd_dp; 5684 struct sdebug_scsi_cmd *sdsc = scsi_cmd_priv(cmnd); 5685 struct sdebug_queued_cmd *sqcp = TO_QUEUED_CMD(cmnd); 5686 5687 lockdep_assert_held(&sdsc->lock); 5688 5689 if (!sqcp) 5690 return false; 5691 sd_dp = &sqcp->sd_dp; 5692 l_defer_t = READ_ONCE(sd_dp->defer_t); 5693 ASSIGN_QUEUED_CMD(cmnd, NULL); 5694 5695 if (stop_qc_helper(sd_dp, l_defer_t)) 5696 sdebug_free_queued_cmd(sqcp); 5697 5698 return true; 5699 } 5700 5701 /* 5702 * Called from scsi_debug_abort() only, which is for timed-out cmd. 5703 */ 5704 static bool scsi_debug_abort_cmnd(struct scsi_cmnd *cmnd) 5705 { 5706 struct sdebug_scsi_cmd *sdsc = scsi_cmd_priv(cmnd); 5707 unsigned long flags; 5708 bool res; 5709 5710 spin_lock_irqsave(&sdsc->lock, flags); 5711 res = scsi_debug_stop_cmnd(cmnd); 5712 spin_unlock_irqrestore(&sdsc->lock, flags); 5713 5714 return res; 5715 } 5716 5717 /* 5718 * All we can do is set the cmnd as internally aborted and wait for it to 5719 * finish. We cannot call scsi_done() as normal completion path may do that. 5720 */ 5721 static bool sdebug_stop_cmnd(struct request *rq, void *data) 5722 { 5723 scsi_debug_abort_cmnd(blk_mq_rq_to_pdu(rq)); 5724 5725 return true; 5726 } 5727 5728 /* Deletes (stops) timers or work queues of all queued commands */ 5729 static void stop_all_queued(void) 5730 { 5731 struct sdebug_host_info *sdhp; 5732 5733 mutex_lock(&sdebug_host_list_mutex); 5734 list_for_each_entry(sdhp, &sdebug_host_list, host_list) { 5735 struct Scsi_Host *shost = sdhp->shost; 5736 5737 blk_mq_tagset_busy_iter(&shost->tag_set, sdebug_stop_cmnd, NULL); 5738 } 5739 mutex_unlock(&sdebug_host_list_mutex); 5740 } 5741 5742 static int sdebug_fail_abort(struct scsi_cmnd *cmnd) 5743 { 5744 struct scsi_device *sdp = cmnd->device; 5745 struct sdebug_dev_info *devip = (struct sdebug_dev_info *)sdp->hostdata; 5746 struct sdebug_err_inject *err; 5747 unsigned char *cmd = cmnd->cmnd; 5748 int ret = 0; 5749 5750 if (devip == NULL) 5751 return 0; 5752 5753 rcu_read_lock(); 5754 list_for_each_entry_rcu(err, &devip->inject_err_list, list) { 5755 if (err->type == ERR_ABORT_CMD_FAILED && 5756 (err->cmd == cmd[0] || err->cmd == 0xff)) { 5757 ret = !!err->cnt; 5758 if (err->cnt < 0) 5759 err->cnt++; 5760 5761 rcu_read_unlock(); 5762 return ret; 5763 } 5764 } 5765 rcu_read_unlock(); 5766 5767 return 0; 5768 } 5769 5770 static int scsi_debug_abort(struct scsi_cmnd *SCpnt) 5771 { 5772 bool ok = scsi_debug_abort_cmnd(SCpnt); 5773 u8 *cmd = SCpnt->cmnd; 5774 u8 opcode = cmd[0]; 5775 5776 ++num_aborts; 5777 5778 if (SDEBUG_OPT_ALL_NOISE & sdebug_opts) 5779 sdev_printk(KERN_INFO, SCpnt->device, 5780 "%s: command%s found\n", __func__, 5781 ok ? "" : " not"); 5782 5783 if (sdebug_fail_abort(SCpnt)) { 5784 scmd_printk(KERN_INFO, SCpnt, "fail abort command 0x%x\n", 5785 opcode); 5786 return FAILED; 5787 } 5788 5789 return SUCCESS; 5790 } 5791 5792 static bool scsi_debug_stop_all_queued_iter(struct request *rq, void *data) 5793 { 5794 struct scsi_device *sdp = data; 5795 struct scsi_cmnd *scmd = blk_mq_rq_to_pdu(rq); 5796 5797 if (scmd->device == sdp) 5798 scsi_debug_abort_cmnd(scmd); 5799 5800 return true; 5801 } 5802 5803 /* Deletes (stops) timers or work queues of all queued commands per sdev */ 5804 static void scsi_debug_stop_all_queued(struct scsi_device *sdp) 5805 { 5806 struct Scsi_Host *shost = sdp->host; 5807 5808 blk_mq_tagset_busy_iter(&shost->tag_set, 5809 scsi_debug_stop_all_queued_iter, sdp); 5810 } 5811 5812 static int sdebug_fail_lun_reset(struct scsi_cmnd *cmnd) 5813 { 5814 struct scsi_device *sdp = cmnd->device; 5815 struct sdebug_dev_info *devip = (struct sdebug_dev_info *)sdp->hostdata; 5816 struct sdebug_err_inject *err; 5817 unsigned char *cmd = cmnd->cmnd; 5818 int ret = 0; 5819 5820 if (devip == NULL) 5821 return 0; 5822 5823 rcu_read_lock(); 5824 list_for_each_entry_rcu(err, &devip->inject_err_list, list) { 5825 if (err->type == ERR_LUN_RESET_FAILED && 5826 (err->cmd == cmd[0] || err->cmd == 0xff)) { 5827 ret = !!err->cnt; 5828 if (err->cnt < 0) 5829 err->cnt++; 5830 5831 rcu_read_unlock(); 5832 return ret; 5833 } 5834 } 5835 rcu_read_unlock(); 5836 5837 return 0; 5838 } 5839 5840 static int scsi_debug_device_reset(struct scsi_cmnd *SCpnt) 5841 { 5842 struct scsi_device *sdp = SCpnt->device; 5843 struct sdebug_dev_info *devip = sdp->hostdata; 5844 u8 *cmd = SCpnt->cmnd; 5845 u8 opcode = cmd[0]; 5846 5847 ++num_dev_resets; 5848 5849 if (SDEBUG_OPT_ALL_NOISE & sdebug_opts) 5850 sdev_printk(KERN_INFO, sdp, "%s\n", __func__); 5851 5852 scsi_debug_stop_all_queued(sdp); 5853 if (devip) 5854 set_bit(SDEBUG_UA_POR, devip->uas_bm); 5855 5856 if (sdebug_fail_lun_reset(SCpnt)) { 5857 scmd_printk(KERN_INFO, SCpnt, "fail lun reset 0x%x\n", opcode); 5858 return FAILED; 5859 } 5860 5861 return SUCCESS; 5862 } 5863 5864 static int sdebug_fail_target_reset(struct scsi_cmnd *cmnd) 5865 { 5866 struct scsi_target *starget = scsi_target(cmnd->device); 5867 struct sdebug_target_info *targetip = 5868 (struct sdebug_target_info *)starget->hostdata; 5869 5870 if (targetip) 5871 return targetip->reset_fail; 5872 5873 return 0; 5874 } 5875 5876 static int scsi_debug_target_reset(struct scsi_cmnd *SCpnt) 5877 { 5878 struct scsi_device *sdp = SCpnt->device; 5879 struct sdebug_host_info *sdbg_host = shost_to_sdebug_host(sdp->host); 5880 struct sdebug_dev_info *devip; 5881 u8 *cmd = SCpnt->cmnd; 5882 u8 opcode = cmd[0]; 5883 int k = 0; 5884 5885 ++num_target_resets; 5886 if (SDEBUG_OPT_ALL_NOISE & sdebug_opts) 5887 sdev_printk(KERN_INFO, sdp, "%s\n", __func__); 5888 5889 list_for_each_entry(devip, &sdbg_host->dev_info_list, dev_list) { 5890 if (devip->target == sdp->id) { 5891 set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm); 5892 ++k; 5893 } 5894 } 5895 5896 if (SDEBUG_OPT_RESET_NOISE & sdebug_opts) 5897 sdev_printk(KERN_INFO, sdp, 5898 "%s: %d device(s) found in target\n", __func__, k); 5899 5900 if (sdebug_fail_target_reset(SCpnt)) { 5901 scmd_printk(KERN_INFO, SCpnt, "fail target reset 0x%x\n", 5902 opcode); 5903 return FAILED; 5904 } 5905 5906 return SUCCESS; 5907 } 5908 5909 static int scsi_debug_bus_reset(struct scsi_cmnd *SCpnt) 5910 { 5911 struct scsi_device *sdp = SCpnt->device; 5912 struct sdebug_host_info *sdbg_host = shost_to_sdebug_host(sdp->host); 5913 struct sdebug_dev_info *devip; 5914 int k = 0; 5915 5916 ++num_bus_resets; 5917 5918 if (SDEBUG_OPT_ALL_NOISE & sdebug_opts) 5919 sdev_printk(KERN_INFO, sdp, "%s\n", __func__); 5920 5921 list_for_each_entry(devip, &sdbg_host->dev_info_list, dev_list) { 5922 set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm); 5923 ++k; 5924 } 5925 5926 if (SDEBUG_OPT_RESET_NOISE & sdebug_opts) 5927 sdev_printk(KERN_INFO, sdp, 5928 "%s: %d device(s) found in host\n", __func__, k); 5929 return SUCCESS; 5930 } 5931 5932 static int scsi_debug_host_reset(struct scsi_cmnd *SCpnt) 5933 { 5934 struct sdebug_host_info *sdbg_host; 5935 struct sdebug_dev_info *devip; 5936 int k = 0; 5937 5938 ++num_host_resets; 5939 if (SDEBUG_OPT_ALL_NOISE & sdebug_opts) 5940 sdev_printk(KERN_INFO, SCpnt->device, "%s\n", __func__); 5941 mutex_lock(&sdebug_host_list_mutex); 5942 list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) { 5943 list_for_each_entry(devip, &sdbg_host->dev_info_list, 5944 dev_list) { 5945 set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm); 5946 ++k; 5947 } 5948 } 5949 mutex_unlock(&sdebug_host_list_mutex); 5950 stop_all_queued(); 5951 if (SDEBUG_OPT_RESET_NOISE & sdebug_opts) 5952 sdev_printk(KERN_INFO, SCpnt->device, 5953 "%s: %d device(s) found\n", __func__, k); 5954 return SUCCESS; 5955 } 5956 5957 static void sdebug_build_parts(unsigned char *ramp, unsigned long store_size) 5958 { 5959 struct msdos_partition *pp; 5960 int starts[SDEBUG_MAX_PARTS + 2], max_part_secs; 5961 int sectors_per_part, num_sectors, k; 5962 int heads_by_sects, start_sec, end_sec; 5963 5964 /* assume partition table already zeroed */ 5965 if ((sdebug_num_parts < 1) || (store_size < 1048576)) 5966 return; 5967 if (sdebug_num_parts > SDEBUG_MAX_PARTS) { 5968 sdebug_num_parts = SDEBUG_MAX_PARTS; 5969 pr_warn("reducing partitions to %d\n", SDEBUG_MAX_PARTS); 5970 } 5971 num_sectors = (int)get_sdebug_capacity(); 5972 sectors_per_part = (num_sectors - sdebug_sectors_per) 5973 / sdebug_num_parts; 5974 heads_by_sects = sdebug_heads * sdebug_sectors_per; 5975 starts[0] = sdebug_sectors_per; 5976 max_part_secs = sectors_per_part; 5977 for (k = 1; k < sdebug_num_parts; ++k) { 5978 starts[k] = ((k * sectors_per_part) / heads_by_sects) 5979 * heads_by_sects; 5980 if (starts[k] - starts[k - 1] < max_part_secs) 5981 max_part_secs = starts[k] - starts[k - 1]; 5982 } 5983 starts[sdebug_num_parts] = num_sectors; 5984 starts[sdebug_num_parts + 1] = 0; 5985 5986 ramp[510] = 0x55; /* magic partition markings */ 5987 ramp[511] = 0xAA; 5988 pp = (struct msdos_partition *)(ramp + 0x1be); 5989 for (k = 0; starts[k + 1]; ++k, ++pp) { 5990 start_sec = starts[k]; 5991 end_sec = starts[k] + max_part_secs - 1; 5992 pp->boot_ind = 0; 5993 5994 pp->cyl = start_sec / heads_by_sects; 5995 pp->head = (start_sec - (pp->cyl * heads_by_sects)) 5996 / sdebug_sectors_per; 5997 pp->sector = (start_sec % sdebug_sectors_per) + 1; 5998 5999 pp->end_cyl = end_sec / heads_by_sects; 6000 pp->end_head = (end_sec - (pp->end_cyl * heads_by_sects)) 6001 / sdebug_sectors_per; 6002 pp->end_sector = (end_sec % sdebug_sectors_per) + 1; 6003 6004 pp->start_sect = cpu_to_le32(start_sec); 6005 pp->nr_sects = cpu_to_le32(end_sec - start_sec + 1); 6006 pp->sys_ind = 0x83; /* plain Linux partition */ 6007 } 6008 } 6009 6010 static void block_unblock_all_queues(bool block) 6011 { 6012 struct sdebug_host_info *sdhp; 6013 6014 lockdep_assert_held(&sdebug_host_list_mutex); 6015 6016 list_for_each_entry(sdhp, &sdebug_host_list, host_list) { 6017 struct Scsi_Host *shost = sdhp->shost; 6018 6019 if (block) 6020 scsi_block_requests(shost); 6021 else 6022 scsi_unblock_requests(shost); 6023 } 6024 } 6025 6026 /* Adjust (by rounding down) the sdebug_cmnd_count so abs(every_nth)-1 6027 * commands will be processed normally before triggers occur. 6028 */ 6029 static void tweak_cmnd_count(void) 6030 { 6031 int count, modulo; 6032 6033 modulo = abs(sdebug_every_nth); 6034 if (modulo < 2) 6035 return; 6036 6037 mutex_lock(&sdebug_host_list_mutex); 6038 block_unblock_all_queues(true); 6039 count = atomic_read(&sdebug_cmnd_count); 6040 atomic_set(&sdebug_cmnd_count, (count / modulo) * modulo); 6041 block_unblock_all_queues(false); 6042 mutex_unlock(&sdebug_host_list_mutex); 6043 } 6044 6045 static void clear_queue_stats(void) 6046 { 6047 atomic_set(&sdebug_cmnd_count, 0); 6048 atomic_set(&sdebug_completions, 0); 6049 atomic_set(&sdebug_miss_cpus, 0); 6050 atomic_set(&sdebug_a_tsf, 0); 6051 } 6052 6053 static bool inject_on_this_cmd(void) 6054 { 6055 if (sdebug_every_nth == 0) 6056 return false; 6057 return (atomic_read(&sdebug_cmnd_count) % abs(sdebug_every_nth)) == 0; 6058 } 6059 6060 #define INCLUSIVE_TIMING_MAX_NS 1000000 /* 1 millisecond */ 6061 6062 6063 void sdebug_free_queued_cmd(struct sdebug_queued_cmd *sqcp) 6064 { 6065 if (sqcp) 6066 kmem_cache_free(queued_cmd_cache, sqcp); 6067 } 6068 6069 static struct sdebug_queued_cmd *sdebug_alloc_queued_cmd(struct scsi_cmnd *scmd) 6070 { 6071 struct sdebug_queued_cmd *sqcp; 6072 struct sdebug_defer *sd_dp; 6073 6074 sqcp = kmem_cache_zalloc(queued_cmd_cache, GFP_ATOMIC); 6075 if (!sqcp) 6076 return NULL; 6077 6078 sd_dp = &sqcp->sd_dp; 6079 6080 hrtimer_init(&sd_dp->hrt, CLOCK_MONOTONIC, HRTIMER_MODE_REL_PINNED); 6081 sd_dp->hrt.function = sdebug_q_cmd_hrt_complete; 6082 INIT_WORK(&sd_dp->ew.work, sdebug_q_cmd_wq_complete); 6083 6084 sqcp->scmd = scmd; 6085 6086 return sqcp; 6087 } 6088 6089 /* Complete the processing of the thread that queued a SCSI command to this 6090 * driver. It either completes the command by calling cmnd_done() or 6091 * schedules a hr timer or work queue then returns 0. Returns 6092 * SCSI_MLQUEUE_HOST_BUSY if temporarily out of resources. 6093 */ 6094 static int schedule_resp(struct scsi_cmnd *cmnd, struct sdebug_dev_info *devip, 6095 int scsi_result, 6096 int (*pfp)(struct scsi_cmnd *, 6097 struct sdebug_dev_info *), 6098 int delta_jiff, int ndelay) 6099 { 6100 struct request *rq = scsi_cmd_to_rq(cmnd); 6101 bool polled = rq->cmd_flags & REQ_POLLED; 6102 struct sdebug_scsi_cmd *sdsc = scsi_cmd_priv(cmnd); 6103 unsigned long flags; 6104 u64 ns_from_boot = 0; 6105 struct sdebug_queued_cmd *sqcp; 6106 struct scsi_device *sdp; 6107 struct sdebug_defer *sd_dp; 6108 6109 if (unlikely(devip == NULL)) { 6110 if (scsi_result == 0) 6111 scsi_result = DID_NO_CONNECT << 16; 6112 goto respond_in_thread; 6113 } 6114 sdp = cmnd->device; 6115 6116 if (delta_jiff == 0) 6117 goto respond_in_thread; 6118 6119 6120 if (unlikely(sdebug_every_nth && (SDEBUG_OPT_RARE_TSF & sdebug_opts) && 6121 (scsi_result == 0))) { 6122 int num_in_q = scsi_device_busy(sdp); 6123 int qdepth = cmnd->device->queue_depth; 6124 6125 if ((num_in_q == qdepth) && 6126 (atomic_inc_return(&sdebug_a_tsf) >= 6127 abs(sdebug_every_nth))) { 6128 atomic_set(&sdebug_a_tsf, 0); 6129 scsi_result = device_qfull_result; 6130 6131 if (unlikely(SDEBUG_OPT_Q_NOISE & sdebug_opts)) 6132 sdev_printk(KERN_INFO, sdp, "%s: num_in_q=%d +1, <inject> status: TASK SET FULL\n", 6133 __func__, num_in_q); 6134 } 6135 } 6136 6137 sqcp = sdebug_alloc_queued_cmd(cmnd); 6138 if (!sqcp) { 6139 pr_err("%s no alloc\n", __func__); 6140 return SCSI_MLQUEUE_HOST_BUSY; 6141 } 6142 sd_dp = &sqcp->sd_dp; 6143 6144 if (polled) 6145 ns_from_boot = ktime_get_boottime_ns(); 6146 6147 /* one of the resp_*() response functions is called here */ 6148 cmnd->result = pfp ? pfp(cmnd, devip) : 0; 6149 if (cmnd->result & SDEG_RES_IMMED_MASK) { 6150 cmnd->result &= ~SDEG_RES_IMMED_MASK; 6151 delta_jiff = ndelay = 0; 6152 } 6153 if (cmnd->result == 0 && scsi_result != 0) 6154 cmnd->result = scsi_result; 6155 if (cmnd->result == 0 && unlikely(sdebug_opts & SDEBUG_OPT_TRANSPORT_ERR)) { 6156 if (atomic_read(&sdeb_inject_pending)) { 6157 mk_sense_buffer(cmnd, ABORTED_COMMAND, TRANSPORT_PROBLEM, ACK_NAK_TO); 6158 atomic_set(&sdeb_inject_pending, 0); 6159 cmnd->result = check_condition_result; 6160 } 6161 } 6162 6163 if (unlikely(sdebug_verbose && cmnd->result)) 6164 sdev_printk(KERN_INFO, sdp, "%s: non-zero result=0x%x\n", 6165 __func__, cmnd->result); 6166 6167 if (delta_jiff > 0 || ndelay > 0) { 6168 ktime_t kt; 6169 6170 if (delta_jiff > 0) { 6171 u64 ns = jiffies_to_nsecs(delta_jiff); 6172 6173 if (sdebug_random && ns < U32_MAX) { 6174 ns = get_random_u32_below((u32)ns); 6175 } else if (sdebug_random) { 6176 ns >>= 12; /* scale to 4 usec precision */ 6177 if (ns < U32_MAX) /* over 4 hours max */ 6178 ns = get_random_u32_below((u32)ns); 6179 ns <<= 12; 6180 } 6181 kt = ns_to_ktime(ns); 6182 } else { /* ndelay has a 4.2 second max */ 6183 kt = sdebug_random ? get_random_u32_below((u32)ndelay) : 6184 (u32)ndelay; 6185 if (ndelay < INCLUSIVE_TIMING_MAX_NS) { 6186 u64 d = ktime_get_boottime_ns() - ns_from_boot; 6187 6188 if (kt <= d) { /* elapsed duration >= kt */ 6189 /* call scsi_done() from this thread */ 6190 sdebug_free_queued_cmd(sqcp); 6191 scsi_done(cmnd); 6192 return 0; 6193 } 6194 /* otherwise reduce kt by elapsed time */ 6195 kt -= d; 6196 } 6197 } 6198 if (sdebug_statistics) 6199 sd_dp->issuing_cpu = raw_smp_processor_id(); 6200 if (polled) { 6201 spin_lock_irqsave(&sdsc->lock, flags); 6202 sd_dp->cmpl_ts = ktime_add(ns_to_ktime(ns_from_boot), kt); 6203 ASSIGN_QUEUED_CMD(cmnd, sqcp); 6204 WRITE_ONCE(sd_dp->defer_t, SDEB_DEFER_POLL); 6205 spin_unlock_irqrestore(&sdsc->lock, flags); 6206 } else { 6207 /* schedule the invocation of scsi_done() for a later time */ 6208 spin_lock_irqsave(&sdsc->lock, flags); 6209 ASSIGN_QUEUED_CMD(cmnd, sqcp); 6210 WRITE_ONCE(sd_dp->defer_t, SDEB_DEFER_HRT); 6211 hrtimer_start(&sd_dp->hrt, kt, HRTIMER_MODE_REL_PINNED); 6212 /* 6213 * The completion handler will try to grab sqcp->lock, 6214 * so there is no chance that the completion handler 6215 * will call scsi_done() until we release the lock 6216 * here (so ok to keep referencing sdsc). 6217 */ 6218 spin_unlock_irqrestore(&sdsc->lock, flags); 6219 } 6220 } else { /* jdelay < 0, use work queue */ 6221 if (unlikely((sdebug_opts & SDEBUG_OPT_CMD_ABORT) && 6222 atomic_read(&sdeb_inject_pending))) { 6223 sd_dp->aborted = true; 6224 atomic_set(&sdeb_inject_pending, 0); 6225 sdev_printk(KERN_INFO, sdp, "abort request tag=%#x\n", 6226 blk_mq_unique_tag_to_tag(get_tag(cmnd))); 6227 } 6228 6229 if (sdebug_statistics) 6230 sd_dp->issuing_cpu = raw_smp_processor_id(); 6231 if (polled) { 6232 spin_lock_irqsave(&sdsc->lock, flags); 6233 ASSIGN_QUEUED_CMD(cmnd, sqcp); 6234 sd_dp->cmpl_ts = ns_to_ktime(ns_from_boot); 6235 WRITE_ONCE(sd_dp->defer_t, SDEB_DEFER_POLL); 6236 spin_unlock_irqrestore(&sdsc->lock, flags); 6237 } else { 6238 spin_lock_irqsave(&sdsc->lock, flags); 6239 ASSIGN_QUEUED_CMD(cmnd, sqcp); 6240 WRITE_ONCE(sd_dp->defer_t, SDEB_DEFER_WQ); 6241 schedule_work(&sd_dp->ew.work); 6242 spin_unlock_irqrestore(&sdsc->lock, flags); 6243 } 6244 } 6245 6246 return 0; 6247 6248 respond_in_thread: /* call back to mid-layer using invocation thread */ 6249 cmnd->result = pfp != NULL ? pfp(cmnd, devip) : 0; 6250 cmnd->result &= ~SDEG_RES_IMMED_MASK; 6251 if (cmnd->result == 0 && scsi_result != 0) 6252 cmnd->result = scsi_result; 6253 scsi_done(cmnd); 6254 return 0; 6255 } 6256 6257 /* Note: The following macros create attribute files in the 6258 /sys/module/scsi_debug/parameters directory. Unfortunately this 6259 driver is unaware of a change and cannot trigger auxiliary actions 6260 as it can when the corresponding attribute in the 6261 /sys/bus/pseudo/drivers/scsi_debug directory is changed. 6262 */ 6263 module_param_named(add_host, sdebug_add_host, int, S_IRUGO | S_IWUSR); 6264 module_param_named(ato, sdebug_ato, int, S_IRUGO); 6265 module_param_named(cdb_len, sdebug_cdb_len, int, 0644); 6266 module_param_named(clustering, sdebug_clustering, bool, S_IRUGO | S_IWUSR); 6267 module_param_named(delay, sdebug_jdelay, int, S_IRUGO | S_IWUSR); 6268 module_param_named(dev_size_mb, sdebug_dev_size_mb, int, S_IRUGO); 6269 module_param_named(dif, sdebug_dif, int, S_IRUGO); 6270 module_param_named(dix, sdebug_dix, int, S_IRUGO); 6271 module_param_named(dsense, sdebug_dsense, int, S_IRUGO | S_IWUSR); 6272 module_param_named(every_nth, sdebug_every_nth, int, S_IRUGO | S_IWUSR); 6273 module_param_named(fake_rw, sdebug_fake_rw, int, S_IRUGO | S_IWUSR); 6274 module_param_named(guard, sdebug_guard, uint, S_IRUGO); 6275 module_param_named(host_lock, sdebug_host_lock, bool, S_IRUGO | S_IWUSR); 6276 module_param_named(host_max_queue, sdebug_host_max_queue, int, S_IRUGO); 6277 module_param_string(inq_product, sdebug_inq_product_id, 6278 sizeof(sdebug_inq_product_id), S_IRUGO | S_IWUSR); 6279 module_param_string(inq_rev, sdebug_inq_product_rev, 6280 sizeof(sdebug_inq_product_rev), S_IRUGO | S_IWUSR); 6281 module_param_string(inq_vendor, sdebug_inq_vendor_id, 6282 sizeof(sdebug_inq_vendor_id), S_IRUGO | S_IWUSR); 6283 module_param_named(lbprz, sdebug_lbprz, int, S_IRUGO); 6284 module_param_named(lbpu, sdebug_lbpu, int, S_IRUGO); 6285 module_param_named(lbpws, sdebug_lbpws, int, S_IRUGO); 6286 module_param_named(lbpws10, sdebug_lbpws10, int, S_IRUGO); 6287 module_param_named(lowest_aligned, sdebug_lowest_aligned, int, S_IRUGO); 6288 module_param_named(lun_format, sdebug_lun_am_i, int, S_IRUGO | S_IWUSR); 6289 module_param_named(max_luns, sdebug_max_luns, int, S_IRUGO | S_IWUSR); 6290 module_param_named(max_queue, sdebug_max_queue, int, S_IRUGO | S_IWUSR); 6291 module_param_named(medium_error_count, sdebug_medium_error_count, int, 6292 S_IRUGO | S_IWUSR); 6293 module_param_named(medium_error_start, sdebug_medium_error_start, int, 6294 S_IRUGO | S_IWUSR); 6295 module_param_named(ndelay, sdebug_ndelay, int, S_IRUGO | S_IWUSR); 6296 module_param_named(no_lun_0, sdebug_no_lun_0, int, S_IRUGO | S_IWUSR); 6297 module_param_named(no_rwlock, sdebug_no_rwlock, bool, S_IRUGO | S_IWUSR); 6298 module_param_named(no_uld, sdebug_no_uld, int, S_IRUGO); 6299 module_param_named(num_parts, sdebug_num_parts, int, S_IRUGO); 6300 module_param_named(num_tgts, sdebug_num_tgts, int, S_IRUGO | S_IWUSR); 6301 module_param_named(opt_blks, sdebug_opt_blks, int, S_IRUGO); 6302 module_param_named(opt_xferlen_exp, sdebug_opt_xferlen_exp, int, S_IRUGO); 6303 module_param_named(opts, sdebug_opts, int, S_IRUGO | S_IWUSR); 6304 module_param_named(per_host_store, sdebug_per_host_store, bool, 6305 S_IRUGO | S_IWUSR); 6306 module_param_named(physblk_exp, sdebug_physblk_exp, int, S_IRUGO); 6307 module_param_named(ptype, sdebug_ptype, int, S_IRUGO | S_IWUSR); 6308 module_param_named(random, sdebug_random, bool, S_IRUGO | S_IWUSR); 6309 module_param_named(removable, sdebug_removable, bool, S_IRUGO | S_IWUSR); 6310 module_param_named(scsi_level, sdebug_scsi_level, int, S_IRUGO); 6311 module_param_named(sector_size, sdebug_sector_size, int, S_IRUGO); 6312 module_param_named(statistics, sdebug_statistics, bool, S_IRUGO | S_IWUSR); 6313 module_param_named(strict, sdebug_strict, bool, S_IRUGO | S_IWUSR); 6314 module_param_named(submit_queues, submit_queues, int, S_IRUGO); 6315 module_param_named(poll_queues, poll_queues, int, S_IRUGO); 6316 module_param_named(tur_ms_to_ready, sdeb_tur_ms_to_ready, int, S_IRUGO); 6317 module_param_named(unmap_alignment, sdebug_unmap_alignment, int, S_IRUGO); 6318 module_param_named(unmap_granularity, sdebug_unmap_granularity, int, S_IRUGO); 6319 module_param_named(unmap_max_blocks, sdebug_unmap_max_blocks, int, S_IRUGO); 6320 module_param_named(unmap_max_desc, sdebug_unmap_max_desc, int, S_IRUGO); 6321 module_param_named(uuid_ctl, sdebug_uuid_ctl, int, S_IRUGO); 6322 module_param_named(virtual_gb, sdebug_virtual_gb, int, S_IRUGO | S_IWUSR); 6323 module_param_named(vpd_use_hostno, sdebug_vpd_use_hostno, int, 6324 S_IRUGO | S_IWUSR); 6325 module_param_named(wp, sdebug_wp, bool, S_IRUGO | S_IWUSR); 6326 module_param_named(write_same_length, sdebug_write_same_length, int, 6327 S_IRUGO | S_IWUSR); 6328 module_param_named(zbc, sdeb_zbc_model_s, charp, S_IRUGO); 6329 module_param_named(zone_cap_mb, sdeb_zbc_zone_cap_mb, int, S_IRUGO); 6330 module_param_named(zone_max_open, sdeb_zbc_max_open, int, S_IRUGO); 6331 module_param_named(zone_nr_conv, sdeb_zbc_nr_conv, int, S_IRUGO); 6332 module_param_named(zone_size_mb, sdeb_zbc_zone_size_mb, int, S_IRUGO); 6333 module_param_named(allow_restart, sdebug_allow_restart, bool, S_IRUGO | S_IWUSR); 6334 6335 MODULE_AUTHOR("Eric Youngdale + Douglas Gilbert"); 6336 MODULE_DESCRIPTION("SCSI debug adapter driver"); 6337 MODULE_LICENSE("GPL"); 6338 MODULE_VERSION(SDEBUG_VERSION); 6339 6340 MODULE_PARM_DESC(add_host, "add n hosts, in sysfs if negative remove host(s) (def=1)"); 6341 MODULE_PARM_DESC(ato, "application tag ownership: 0=disk 1=host (def=1)"); 6342 MODULE_PARM_DESC(cdb_len, "suggest CDB lengths to drivers (def=10)"); 6343 MODULE_PARM_DESC(clustering, "when set enables larger transfers (def=0)"); 6344 MODULE_PARM_DESC(delay, "response delay (def=1 jiffy); 0:imm, -1,-2:tiny"); 6345 MODULE_PARM_DESC(dev_size_mb, "size in MiB of ram shared by devs(def=8)"); 6346 MODULE_PARM_DESC(dif, "data integrity field type: 0-3 (def=0)"); 6347 MODULE_PARM_DESC(dix, "data integrity extensions mask (def=0)"); 6348 MODULE_PARM_DESC(dsense, "use descriptor sense format(def=0 -> fixed)"); 6349 MODULE_PARM_DESC(every_nth, "timeout every nth command(def=0)"); 6350 MODULE_PARM_DESC(fake_rw, "fake reads/writes instead of copying (def=0)"); 6351 MODULE_PARM_DESC(guard, "protection checksum: 0=crc, 1=ip (def=0)"); 6352 MODULE_PARM_DESC(host_lock, "host_lock is ignored (def=0)"); 6353 MODULE_PARM_DESC(host_max_queue, 6354 "host max # of queued cmds (0 to max(def) [max_queue fixed equal for !0])"); 6355 MODULE_PARM_DESC(inq_product, "SCSI INQUIRY product string (def=\"scsi_debug\")"); 6356 MODULE_PARM_DESC(inq_rev, "SCSI INQUIRY revision string (def=\"" 6357 SDEBUG_VERSION "\")"); 6358 MODULE_PARM_DESC(inq_vendor, "SCSI INQUIRY vendor string (def=\"Linux\")"); 6359 MODULE_PARM_DESC(lbprz, 6360 "on read unmapped LBs return 0 when 1 (def), return 0xff when 2"); 6361 MODULE_PARM_DESC(lbpu, "enable LBP, support UNMAP command (def=0)"); 6362 MODULE_PARM_DESC(lbpws, "enable LBP, support WRITE SAME(16) with UNMAP bit (def=0)"); 6363 MODULE_PARM_DESC(lbpws10, "enable LBP, support WRITE SAME(10) with UNMAP bit (def=0)"); 6364 MODULE_PARM_DESC(lowest_aligned, "lowest aligned lba (def=0)"); 6365 MODULE_PARM_DESC(lun_format, "LUN format: 0->peripheral (def); 1 --> flat address method"); 6366 MODULE_PARM_DESC(max_luns, "number of LUNs per target to simulate(def=1)"); 6367 MODULE_PARM_DESC(max_queue, "max number of queued commands (1 to max(def))"); 6368 MODULE_PARM_DESC(medium_error_count, "count of sectors to return follow on MEDIUM error"); 6369 MODULE_PARM_DESC(medium_error_start, "starting sector number to return MEDIUM error"); 6370 MODULE_PARM_DESC(ndelay, "response delay in nanoseconds (def=0 -> ignore)"); 6371 MODULE_PARM_DESC(no_lun_0, "no LU number 0 (def=0 -> have lun 0)"); 6372 MODULE_PARM_DESC(no_rwlock, "don't protect user data reads+writes (def=0)"); 6373 MODULE_PARM_DESC(no_uld, "stop ULD (e.g. sd driver) attaching (def=0))"); 6374 MODULE_PARM_DESC(num_parts, "number of partitions(def=0)"); 6375 MODULE_PARM_DESC(num_tgts, "number of targets per host to simulate(def=1)"); 6376 MODULE_PARM_DESC(opt_blks, "optimal transfer length in blocks (def=1024)"); 6377 MODULE_PARM_DESC(opt_xferlen_exp, "optimal transfer length granularity exponent (def=physblk_exp)"); 6378 MODULE_PARM_DESC(opts, "1->noise, 2->medium_err, 4->timeout, 8->recovered_err... (def=0)"); 6379 MODULE_PARM_DESC(per_host_store, "If set, next positive add_host will get new store (def=0)"); 6380 MODULE_PARM_DESC(physblk_exp, "physical block exponent (def=0)"); 6381 MODULE_PARM_DESC(poll_queues, "support for iouring iopoll queues (1 to max(submit_queues - 1))"); 6382 MODULE_PARM_DESC(ptype, "SCSI peripheral type(def=0[disk])"); 6383 MODULE_PARM_DESC(random, "If set, uniformly randomize command duration between 0 and delay_in_ns"); 6384 MODULE_PARM_DESC(removable, "claim to have removable media (def=0)"); 6385 MODULE_PARM_DESC(scsi_level, "SCSI level to simulate(def=7[SPC-5])"); 6386 MODULE_PARM_DESC(sector_size, "logical block size in bytes (def=512)"); 6387 MODULE_PARM_DESC(statistics, "collect statistics on commands, queues (def=0)"); 6388 MODULE_PARM_DESC(strict, "stricter checks: reserved field in cdb (def=0)"); 6389 MODULE_PARM_DESC(submit_queues, "support for block multi-queue (def=1)"); 6390 MODULE_PARM_DESC(tur_ms_to_ready, "TEST UNIT READY millisecs before initial good status (def=0)"); 6391 MODULE_PARM_DESC(unmap_alignment, "lowest aligned thin provisioning lba (def=0)"); 6392 MODULE_PARM_DESC(unmap_granularity, "thin provisioning granularity in blocks (def=1)"); 6393 MODULE_PARM_DESC(unmap_max_blocks, "max # of blocks can be unmapped in one cmd (def=0xffffffff)"); 6394 MODULE_PARM_DESC(unmap_max_desc, "max # of ranges that can be unmapped in one cmd (def=256)"); 6395 MODULE_PARM_DESC(uuid_ctl, 6396 "1->use uuid for lu name, 0->don't, 2->all use same (def=0)"); 6397 MODULE_PARM_DESC(virtual_gb, "virtual gigabyte (GiB) size (def=0 -> use dev_size_mb)"); 6398 MODULE_PARM_DESC(vpd_use_hostno, "0 -> dev ids ignore hostno (def=1 -> unique dev ids)"); 6399 MODULE_PARM_DESC(wp, "Write Protect (def=0)"); 6400 MODULE_PARM_DESC(write_same_length, "Maximum blocks per WRITE SAME cmd (def=0xffff)"); 6401 MODULE_PARM_DESC(zbc, "'none' [0]; 'aware' [1]; 'managed' [2] (def=0). Can have 'host-' prefix"); 6402 MODULE_PARM_DESC(zone_cap_mb, "Zone capacity in MiB (def=zone size)"); 6403 MODULE_PARM_DESC(zone_max_open, "Maximum number of open zones; [0] for no limit (def=auto)"); 6404 MODULE_PARM_DESC(zone_nr_conv, "Number of conventional zones (def=1)"); 6405 MODULE_PARM_DESC(zone_size_mb, "Zone size in MiB (def=auto)"); 6406 MODULE_PARM_DESC(allow_restart, "Set scsi_device's allow_restart flag(def=0)"); 6407 6408 #define SDEBUG_INFO_LEN 256 6409 static char sdebug_info[SDEBUG_INFO_LEN]; 6410 6411 static const char *scsi_debug_info(struct Scsi_Host *shp) 6412 { 6413 int k; 6414 6415 k = scnprintf(sdebug_info, SDEBUG_INFO_LEN, "%s: version %s [%s]\n", 6416 my_name, SDEBUG_VERSION, sdebug_version_date); 6417 if (k >= (SDEBUG_INFO_LEN - 1)) 6418 return sdebug_info; 6419 scnprintf(sdebug_info + k, SDEBUG_INFO_LEN - k, 6420 " dev_size_mb=%d, opts=0x%x, submit_queues=%d, %s=%d", 6421 sdebug_dev_size_mb, sdebug_opts, submit_queues, 6422 "statistics", (int)sdebug_statistics); 6423 return sdebug_info; 6424 } 6425 6426 /* 'echo <val> > /proc/scsi/scsi_debug/<host_id>' writes to opts */ 6427 static int scsi_debug_write_info(struct Scsi_Host *host, char *buffer, 6428 int length) 6429 { 6430 char arr[16]; 6431 int opts; 6432 int minLen = length > 15 ? 15 : length; 6433 6434 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) 6435 return -EACCES; 6436 memcpy(arr, buffer, minLen); 6437 arr[minLen] = '\0'; 6438 if (1 != sscanf(arr, "%d", &opts)) 6439 return -EINVAL; 6440 sdebug_opts = opts; 6441 sdebug_verbose = !!(SDEBUG_OPT_NOISE & opts); 6442 sdebug_any_injecting_opt = !!(SDEBUG_OPT_ALL_INJECTING & opts); 6443 if (sdebug_every_nth != 0) 6444 tweak_cmnd_count(); 6445 return length; 6446 } 6447 6448 struct sdebug_submit_queue_data { 6449 int *first; 6450 int *last; 6451 int queue_num; 6452 }; 6453 6454 static bool sdebug_submit_queue_iter(struct request *rq, void *opaque) 6455 { 6456 struct sdebug_submit_queue_data *data = opaque; 6457 u32 unique_tag = blk_mq_unique_tag(rq); 6458 u16 hwq = blk_mq_unique_tag_to_hwq(unique_tag); 6459 u16 tag = blk_mq_unique_tag_to_tag(unique_tag); 6460 int queue_num = data->queue_num; 6461 6462 if (hwq != queue_num) 6463 return true; 6464 6465 /* Rely on iter'ing in ascending tag order */ 6466 if (*data->first == -1) 6467 *data->first = *data->last = tag; 6468 else 6469 *data->last = tag; 6470 6471 return true; 6472 } 6473 6474 /* Output seen with 'cat /proc/scsi/scsi_debug/<host_id>'. It will be the 6475 * same for each scsi_debug host (if more than one). Some of the counters 6476 * output are not atomics so might be inaccurate in a busy system. */ 6477 static int scsi_debug_show_info(struct seq_file *m, struct Scsi_Host *host) 6478 { 6479 struct sdebug_host_info *sdhp; 6480 int j; 6481 6482 seq_printf(m, "scsi_debug adapter driver, version %s [%s]\n", 6483 SDEBUG_VERSION, sdebug_version_date); 6484 seq_printf(m, "num_tgts=%d, %ssize=%d MB, opts=0x%x, every_nth=%d\n", 6485 sdebug_num_tgts, "shared (ram) ", sdebug_dev_size_mb, 6486 sdebug_opts, sdebug_every_nth); 6487 seq_printf(m, "delay=%d, ndelay=%d, max_luns=%d, sector_size=%d %s\n", 6488 sdebug_jdelay, sdebug_ndelay, sdebug_max_luns, 6489 sdebug_sector_size, "bytes"); 6490 seq_printf(m, "cylinders=%d, heads=%d, sectors=%d, command aborts=%d\n", 6491 sdebug_cylinders_per, sdebug_heads, sdebug_sectors_per, 6492 num_aborts); 6493 seq_printf(m, "RESETs: device=%d, target=%d, bus=%d, host=%d\n", 6494 num_dev_resets, num_target_resets, num_bus_resets, 6495 num_host_resets); 6496 seq_printf(m, "dix_reads=%d, dix_writes=%d, dif_errors=%d\n", 6497 dix_reads, dix_writes, dif_errors); 6498 seq_printf(m, "usec_in_jiffy=%lu, statistics=%d\n", TICK_NSEC / 1000, 6499 sdebug_statistics); 6500 seq_printf(m, "cmnd_count=%d, completions=%d, %s=%d, a_tsf=%d, mq_polls=%d\n", 6501 atomic_read(&sdebug_cmnd_count), 6502 atomic_read(&sdebug_completions), 6503 "miss_cpus", atomic_read(&sdebug_miss_cpus), 6504 atomic_read(&sdebug_a_tsf), 6505 atomic_read(&sdeb_mq_poll_count)); 6506 6507 seq_printf(m, "submit_queues=%d\n", submit_queues); 6508 for (j = 0; j < submit_queues; ++j) { 6509 int f = -1, l = -1; 6510 struct sdebug_submit_queue_data data = { 6511 .queue_num = j, 6512 .first = &f, 6513 .last = &l, 6514 }; 6515 seq_printf(m, " queue %d:\n", j); 6516 blk_mq_tagset_busy_iter(&host->tag_set, sdebug_submit_queue_iter, 6517 &data); 6518 if (f >= 0) { 6519 seq_printf(m, " in_use_bm BUSY: %s: %d,%d\n", 6520 "first,last bits", f, l); 6521 } 6522 } 6523 6524 seq_printf(m, "this host_no=%d\n", host->host_no); 6525 if (!xa_empty(per_store_ap)) { 6526 bool niu; 6527 int idx; 6528 unsigned long l_idx; 6529 struct sdeb_store_info *sip; 6530 6531 seq_puts(m, "\nhost list:\n"); 6532 j = 0; 6533 list_for_each_entry(sdhp, &sdebug_host_list, host_list) { 6534 idx = sdhp->si_idx; 6535 seq_printf(m, " %d: host_no=%d, si_idx=%d\n", j, 6536 sdhp->shost->host_no, idx); 6537 ++j; 6538 } 6539 seq_printf(m, "\nper_store array [most_recent_idx=%d]:\n", 6540 sdeb_most_recent_idx); 6541 j = 0; 6542 xa_for_each(per_store_ap, l_idx, sip) { 6543 niu = xa_get_mark(per_store_ap, l_idx, 6544 SDEB_XA_NOT_IN_USE); 6545 idx = (int)l_idx; 6546 seq_printf(m, " %d: idx=%d%s\n", j, idx, 6547 (niu ? " not_in_use" : "")); 6548 ++j; 6549 } 6550 } 6551 return 0; 6552 } 6553 6554 static ssize_t delay_show(struct device_driver *ddp, char *buf) 6555 { 6556 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_jdelay); 6557 } 6558 /* Returns -EBUSY if jdelay is being changed and commands are queued. The unit 6559 * of delay is jiffies. 6560 */ 6561 static ssize_t delay_store(struct device_driver *ddp, const char *buf, 6562 size_t count) 6563 { 6564 int jdelay, res; 6565 6566 if (count > 0 && sscanf(buf, "%d", &jdelay) == 1) { 6567 res = count; 6568 if (sdebug_jdelay != jdelay) { 6569 struct sdebug_host_info *sdhp; 6570 6571 mutex_lock(&sdebug_host_list_mutex); 6572 block_unblock_all_queues(true); 6573 6574 list_for_each_entry(sdhp, &sdebug_host_list, host_list) { 6575 struct Scsi_Host *shost = sdhp->shost; 6576 6577 if (scsi_host_busy(shost)) { 6578 res = -EBUSY; /* queued commands */ 6579 break; 6580 } 6581 } 6582 if (res > 0) { 6583 sdebug_jdelay = jdelay; 6584 sdebug_ndelay = 0; 6585 } 6586 block_unblock_all_queues(false); 6587 mutex_unlock(&sdebug_host_list_mutex); 6588 } 6589 return res; 6590 } 6591 return -EINVAL; 6592 } 6593 static DRIVER_ATTR_RW(delay); 6594 6595 static ssize_t ndelay_show(struct device_driver *ddp, char *buf) 6596 { 6597 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_ndelay); 6598 } 6599 /* Returns -EBUSY if ndelay is being changed and commands are queued */ 6600 /* If > 0 and accepted then sdebug_jdelay is set to JDELAY_OVERRIDDEN */ 6601 static ssize_t ndelay_store(struct device_driver *ddp, const char *buf, 6602 size_t count) 6603 { 6604 int ndelay, res; 6605 6606 if ((count > 0) && (1 == sscanf(buf, "%d", &ndelay)) && 6607 (ndelay >= 0) && (ndelay < (1000 * 1000 * 1000))) { 6608 res = count; 6609 if (sdebug_ndelay != ndelay) { 6610 struct sdebug_host_info *sdhp; 6611 6612 mutex_lock(&sdebug_host_list_mutex); 6613 block_unblock_all_queues(true); 6614 6615 list_for_each_entry(sdhp, &sdebug_host_list, host_list) { 6616 struct Scsi_Host *shost = sdhp->shost; 6617 6618 if (scsi_host_busy(shost)) { 6619 res = -EBUSY; /* queued commands */ 6620 break; 6621 } 6622 } 6623 6624 if (res > 0) { 6625 sdebug_ndelay = ndelay; 6626 sdebug_jdelay = ndelay ? JDELAY_OVERRIDDEN 6627 : DEF_JDELAY; 6628 } 6629 block_unblock_all_queues(false); 6630 mutex_unlock(&sdebug_host_list_mutex); 6631 } 6632 return res; 6633 } 6634 return -EINVAL; 6635 } 6636 static DRIVER_ATTR_RW(ndelay); 6637 6638 static ssize_t opts_show(struct device_driver *ddp, char *buf) 6639 { 6640 return scnprintf(buf, PAGE_SIZE, "0x%x\n", sdebug_opts); 6641 } 6642 6643 static ssize_t opts_store(struct device_driver *ddp, const char *buf, 6644 size_t count) 6645 { 6646 int opts; 6647 char work[20]; 6648 6649 if (sscanf(buf, "%10s", work) == 1) { 6650 if (strncasecmp(work, "0x", 2) == 0) { 6651 if (kstrtoint(work + 2, 16, &opts) == 0) 6652 goto opts_done; 6653 } else { 6654 if (kstrtoint(work, 10, &opts) == 0) 6655 goto opts_done; 6656 } 6657 } 6658 return -EINVAL; 6659 opts_done: 6660 sdebug_opts = opts; 6661 sdebug_verbose = !!(SDEBUG_OPT_NOISE & opts); 6662 sdebug_any_injecting_opt = !!(SDEBUG_OPT_ALL_INJECTING & opts); 6663 tweak_cmnd_count(); 6664 return count; 6665 } 6666 static DRIVER_ATTR_RW(opts); 6667 6668 static ssize_t ptype_show(struct device_driver *ddp, char *buf) 6669 { 6670 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_ptype); 6671 } 6672 static ssize_t ptype_store(struct device_driver *ddp, const char *buf, 6673 size_t count) 6674 { 6675 int n; 6676 6677 /* Cannot change from or to TYPE_ZBC with sysfs */ 6678 if (sdebug_ptype == TYPE_ZBC) 6679 return -EINVAL; 6680 6681 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) { 6682 if (n == TYPE_ZBC) 6683 return -EINVAL; 6684 sdebug_ptype = n; 6685 return count; 6686 } 6687 return -EINVAL; 6688 } 6689 static DRIVER_ATTR_RW(ptype); 6690 6691 static ssize_t dsense_show(struct device_driver *ddp, char *buf) 6692 { 6693 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_dsense); 6694 } 6695 static ssize_t dsense_store(struct device_driver *ddp, const char *buf, 6696 size_t count) 6697 { 6698 int n; 6699 6700 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) { 6701 sdebug_dsense = n; 6702 return count; 6703 } 6704 return -EINVAL; 6705 } 6706 static DRIVER_ATTR_RW(dsense); 6707 6708 static ssize_t fake_rw_show(struct device_driver *ddp, char *buf) 6709 { 6710 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_fake_rw); 6711 } 6712 static ssize_t fake_rw_store(struct device_driver *ddp, const char *buf, 6713 size_t count) 6714 { 6715 int n, idx; 6716 6717 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) { 6718 bool want_store = (n == 0); 6719 struct sdebug_host_info *sdhp; 6720 6721 n = (n > 0); 6722 sdebug_fake_rw = (sdebug_fake_rw > 0); 6723 if (sdebug_fake_rw == n) 6724 return count; /* not transitioning so do nothing */ 6725 6726 if (want_store) { /* 1 --> 0 transition, set up store */ 6727 if (sdeb_first_idx < 0) { 6728 idx = sdebug_add_store(); 6729 if (idx < 0) 6730 return idx; 6731 } else { 6732 idx = sdeb_first_idx; 6733 xa_clear_mark(per_store_ap, idx, 6734 SDEB_XA_NOT_IN_USE); 6735 } 6736 /* make all hosts use same store */ 6737 list_for_each_entry(sdhp, &sdebug_host_list, 6738 host_list) { 6739 if (sdhp->si_idx != idx) { 6740 xa_set_mark(per_store_ap, sdhp->si_idx, 6741 SDEB_XA_NOT_IN_USE); 6742 sdhp->si_idx = idx; 6743 } 6744 } 6745 sdeb_most_recent_idx = idx; 6746 } else { /* 0 --> 1 transition is trigger for shrink */ 6747 sdebug_erase_all_stores(true /* apart from first */); 6748 } 6749 sdebug_fake_rw = n; 6750 return count; 6751 } 6752 return -EINVAL; 6753 } 6754 static DRIVER_ATTR_RW(fake_rw); 6755 6756 static ssize_t no_lun_0_show(struct device_driver *ddp, char *buf) 6757 { 6758 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_no_lun_0); 6759 } 6760 static ssize_t no_lun_0_store(struct device_driver *ddp, const char *buf, 6761 size_t count) 6762 { 6763 int n; 6764 6765 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) { 6766 sdebug_no_lun_0 = n; 6767 return count; 6768 } 6769 return -EINVAL; 6770 } 6771 static DRIVER_ATTR_RW(no_lun_0); 6772 6773 static ssize_t num_tgts_show(struct device_driver *ddp, char *buf) 6774 { 6775 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_num_tgts); 6776 } 6777 static ssize_t num_tgts_store(struct device_driver *ddp, const char *buf, 6778 size_t count) 6779 { 6780 int n; 6781 6782 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) { 6783 sdebug_num_tgts = n; 6784 sdebug_max_tgts_luns(); 6785 return count; 6786 } 6787 return -EINVAL; 6788 } 6789 static DRIVER_ATTR_RW(num_tgts); 6790 6791 static ssize_t dev_size_mb_show(struct device_driver *ddp, char *buf) 6792 { 6793 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_dev_size_mb); 6794 } 6795 static DRIVER_ATTR_RO(dev_size_mb); 6796 6797 static ssize_t per_host_store_show(struct device_driver *ddp, char *buf) 6798 { 6799 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_per_host_store); 6800 } 6801 6802 static ssize_t per_host_store_store(struct device_driver *ddp, const char *buf, 6803 size_t count) 6804 { 6805 bool v; 6806 6807 if (kstrtobool(buf, &v)) 6808 return -EINVAL; 6809 6810 sdebug_per_host_store = v; 6811 return count; 6812 } 6813 static DRIVER_ATTR_RW(per_host_store); 6814 6815 static ssize_t num_parts_show(struct device_driver *ddp, char *buf) 6816 { 6817 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_num_parts); 6818 } 6819 static DRIVER_ATTR_RO(num_parts); 6820 6821 static ssize_t every_nth_show(struct device_driver *ddp, char *buf) 6822 { 6823 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_every_nth); 6824 } 6825 static ssize_t every_nth_store(struct device_driver *ddp, const char *buf, 6826 size_t count) 6827 { 6828 int nth; 6829 char work[20]; 6830 6831 if (sscanf(buf, "%10s", work) == 1) { 6832 if (strncasecmp(work, "0x", 2) == 0) { 6833 if (kstrtoint(work + 2, 16, &nth) == 0) 6834 goto every_nth_done; 6835 } else { 6836 if (kstrtoint(work, 10, &nth) == 0) 6837 goto every_nth_done; 6838 } 6839 } 6840 return -EINVAL; 6841 6842 every_nth_done: 6843 sdebug_every_nth = nth; 6844 if (nth && !sdebug_statistics) { 6845 pr_info("every_nth needs statistics=1, set it\n"); 6846 sdebug_statistics = true; 6847 } 6848 tweak_cmnd_count(); 6849 return count; 6850 } 6851 static DRIVER_ATTR_RW(every_nth); 6852 6853 static ssize_t lun_format_show(struct device_driver *ddp, char *buf) 6854 { 6855 return scnprintf(buf, PAGE_SIZE, "%d\n", (int)sdebug_lun_am); 6856 } 6857 static ssize_t lun_format_store(struct device_driver *ddp, const char *buf, 6858 size_t count) 6859 { 6860 int n; 6861 bool changed; 6862 6863 if (kstrtoint(buf, 0, &n)) 6864 return -EINVAL; 6865 if (n >= 0) { 6866 if (n > (int)SAM_LUN_AM_FLAT) { 6867 pr_warn("only LUN address methods 0 and 1 are supported\n"); 6868 return -EINVAL; 6869 } 6870 changed = ((int)sdebug_lun_am != n); 6871 sdebug_lun_am = n; 6872 if (changed && sdebug_scsi_level >= 5) { /* >= SPC-3 */ 6873 struct sdebug_host_info *sdhp; 6874 struct sdebug_dev_info *dp; 6875 6876 mutex_lock(&sdebug_host_list_mutex); 6877 list_for_each_entry(sdhp, &sdebug_host_list, host_list) { 6878 list_for_each_entry(dp, &sdhp->dev_info_list, dev_list) { 6879 set_bit(SDEBUG_UA_LUNS_CHANGED, dp->uas_bm); 6880 } 6881 } 6882 mutex_unlock(&sdebug_host_list_mutex); 6883 } 6884 return count; 6885 } 6886 return -EINVAL; 6887 } 6888 static DRIVER_ATTR_RW(lun_format); 6889 6890 static ssize_t max_luns_show(struct device_driver *ddp, char *buf) 6891 { 6892 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_max_luns); 6893 } 6894 static ssize_t max_luns_store(struct device_driver *ddp, const char *buf, 6895 size_t count) 6896 { 6897 int n; 6898 bool changed; 6899 6900 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) { 6901 if (n > 256) { 6902 pr_warn("max_luns can be no more than 256\n"); 6903 return -EINVAL; 6904 } 6905 changed = (sdebug_max_luns != n); 6906 sdebug_max_luns = n; 6907 sdebug_max_tgts_luns(); 6908 if (changed && (sdebug_scsi_level >= 5)) { /* >= SPC-3 */ 6909 struct sdebug_host_info *sdhp; 6910 struct sdebug_dev_info *dp; 6911 6912 mutex_lock(&sdebug_host_list_mutex); 6913 list_for_each_entry(sdhp, &sdebug_host_list, 6914 host_list) { 6915 list_for_each_entry(dp, &sdhp->dev_info_list, 6916 dev_list) { 6917 set_bit(SDEBUG_UA_LUNS_CHANGED, 6918 dp->uas_bm); 6919 } 6920 } 6921 mutex_unlock(&sdebug_host_list_mutex); 6922 } 6923 return count; 6924 } 6925 return -EINVAL; 6926 } 6927 static DRIVER_ATTR_RW(max_luns); 6928 6929 static ssize_t max_queue_show(struct device_driver *ddp, char *buf) 6930 { 6931 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_max_queue); 6932 } 6933 /* N.B. max_queue can be changed while there are queued commands. In flight 6934 * commands beyond the new max_queue will be completed. */ 6935 static ssize_t max_queue_store(struct device_driver *ddp, const char *buf, 6936 size_t count) 6937 { 6938 int n; 6939 6940 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n > 0) && 6941 (n <= SDEBUG_CANQUEUE) && 6942 (sdebug_host_max_queue == 0)) { 6943 mutex_lock(&sdebug_host_list_mutex); 6944 6945 /* We may only change sdebug_max_queue when we have no shosts */ 6946 if (list_empty(&sdebug_host_list)) 6947 sdebug_max_queue = n; 6948 else 6949 count = -EBUSY; 6950 mutex_unlock(&sdebug_host_list_mutex); 6951 return count; 6952 } 6953 return -EINVAL; 6954 } 6955 static DRIVER_ATTR_RW(max_queue); 6956 6957 static ssize_t host_max_queue_show(struct device_driver *ddp, char *buf) 6958 { 6959 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_host_max_queue); 6960 } 6961 6962 static ssize_t no_rwlock_show(struct device_driver *ddp, char *buf) 6963 { 6964 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_no_rwlock); 6965 } 6966 6967 static ssize_t no_rwlock_store(struct device_driver *ddp, const char *buf, size_t count) 6968 { 6969 bool v; 6970 6971 if (kstrtobool(buf, &v)) 6972 return -EINVAL; 6973 6974 sdebug_no_rwlock = v; 6975 return count; 6976 } 6977 static DRIVER_ATTR_RW(no_rwlock); 6978 6979 /* 6980 * Since this is used for .can_queue, and we get the hc_idx tag from the bitmap 6981 * in range [0, sdebug_host_max_queue), we can't change it. 6982 */ 6983 static DRIVER_ATTR_RO(host_max_queue); 6984 6985 static ssize_t no_uld_show(struct device_driver *ddp, char *buf) 6986 { 6987 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_no_uld); 6988 } 6989 static DRIVER_ATTR_RO(no_uld); 6990 6991 static ssize_t scsi_level_show(struct device_driver *ddp, char *buf) 6992 { 6993 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_scsi_level); 6994 } 6995 static DRIVER_ATTR_RO(scsi_level); 6996 6997 static ssize_t virtual_gb_show(struct device_driver *ddp, char *buf) 6998 { 6999 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_virtual_gb); 7000 } 7001 static ssize_t virtual_gb_store(struct device_driver *ddp, const char *buf, 7002 size_t count) 7003 { 7004 int n; 7005 bool changed; 7006 7007 /* Ignore capacity change for ZBC drives for now */ 7008 if (sdeb_zbc_in_use) 7009 return -ENOTSUPP; 7010 7011 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) { 7012 changed = (sdebug_virtual_gb != n); 7013 sdebug_virtual_gb = n; 7014 sdebug_capacity = get_sdebug_capacity(); 7015 if (changed) { 7016 struct sdebug_host_info *sdhp; 7017 struct sdebug_dev_info *dp; 7018 7019 mutex_lock(&sdebug_host_list_mutex); 7020 list_for_each_entry(sdhp, &sdebug_host_list, 7021 host_list) { 7022 list_for_each_entry(dp, &sdhp->dev_info_list, 7023 dev_list) { 7024 set_bit(SDEBUG_UA_CAPACITY_CHANGED, 7025 dp->uas_bm); 7026 } 7027 } 7028 mutex_unlock(&sdebug_host_list_mutex); 7029 } 7030 return count; 7031 } 7032 return -EINVAL; 7033 } 7034 static DRIVER_ATTR_RW(virtual_gb); 7035 7036 static ssize_t add_host_show(struct device_driver *ddp, char *buf) 7037 { 7038 /* absolute number of hosts currently active is what is shown */ 7039 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_num_hosts); 7040 } 7041 7042 static ssize_t add_host_store(struct device_driver *ddp, const char *buf, 7043 size_t count) 7044 { 7045 bool found; 7046 unsigned long idx; 7047 struct sdeb_store_info *sip; 7048 bool want_phs = (sdebug_fake_rw == 0) && sdebug_per_host_store; 7049 int delta_hosts; 7050 7051 if (sscanf(buf, "%d", &delta_hosts) != 1) 7052 return -EINVAL; 7053 if (delta_hosts > 0) { 7054 do { 7055 found = false; 7056 if (want_phs) { 7057 xa_for_each_marked(per_store_ap, idx, sip, 7058 SDEB_XA_NOT_IN_USE) { 7059 sdeb_most_recent_idx = (int)idx; 7060 found = true; 7061 break; 7062 } 7063 if (found) /* re-use case */ 7064 sdebug_add_host_helper((int)idx); 7065 else 7066 sdebug_do_add_host(true); 7067 } else { 7068 sdebug_do_add_host(false); 7069 } 7070 } while (--delta_hosts); 7071 } else if (delta_hosts < 0) { 7072 do { 7073 sdebug_do_remove_host(false); 7074 } while (++delta_hosts); 7075 } 7076 return count; 7077 } 7078 static DRIVER_ATTR_RW(add_host); 7079 7080 static ssize_t vpd_use_hostno_show(struct device_driver *ddp, char *buf) 7081 { 7082 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_vpd_use_hostno); 7083 } 7084 static ssize_t vpd_use_hostno_store(struct device_driver *ddp, const char *buf, 7085 size_t count) 7086 { 7087 int n; 7088 7089 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) { 7090 sdebug_vpd_use_hostno = n; 7091 return count; 7092 } 7093 return -EINVAL; 7094 } 7095 static DRIVER_ATTR_RW(vpd_use_hostno); 7096 7097 static ssize_t statistics_show(struct device_driver *ddp, char *buf) 7098 { 7099 return scnprintf(buf, PAGE_SIZE, "%d\n", (int)sdebug_statistics); 7100 } 7101 static ssize_t statistics_store(struct device_driver *ddp, const char *buf, 7102 size_t count) 7103 { 7104 int n; 7105 7106 if ((count > 0) && (sscanf(buf, "%d", &n) == 1) && (n >= 0)) { 7107 if (n > 0) 7108 sdebug_statistics = true; 7109 else { 7110 clear_queue_stats(); 7111 sdebug_statistics = false; 7112 } 7113 return count; 7114 } 7115 return -EINVAL; 7116 } 7117 static DRIVER_ATTR_RW(statistics); 7118 7119 static ssize_t sector_size_show(struct device_driver *ddp, char *buf) 7120 { 7121 return scnprintf(buf, PAGE_SIZE, "%u\n", sdebug_sector_size); 7122 } 7123 static DRIVER_ATTR_RO(sector_size); 7124 7125 static ssize_t submit_queues_show(struct device_driver *ddp, char *buf) 7126 { 7127 return scnprintf(buf, PAGE_SIZE, "%d\n", submit_queues); 7128 } 7129 static DRIVER_ATTR_RO(submit_queues); 7130 7131 static ssize_t dix_show(struct device_driver *ddp, char *buf) 7132 { 7133 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_dix); 7134 } 7135 static DRIVER_ATTR_RO(dix); 7136 7137 static ssize_t dif_show(struct device_driver *ddp, char *buf) 7138 { 7139 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_dif); 7140 } 7141 static DRIVER_ATTR_RO(dif); 7142 7143 static ssize_t guard_show(struct device_driver *ddp, char *buf) 7144 { 7145 return scnprintf(buf, PAGE_SIZE, "%u\n", sdebug_guard); 7146 } 7147 static DRIVER_ATTR_RO(guard); 7148 7149 static ssize_t ato_show(struct device_driver *ddp, char *buf) 7150 { 7151 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_ato); 7152 } 7153 static DRIVER_ATTR_RO(ato); 7154 7155 static ssize_t map_show(struct device_driver *ddp, char *buf) 7156 { 7157 ssize_t count = 0; 7158 7159 if (!scsi_debug_lbp()) 7160 return scnprintf(buf, PAGE_SIZE, "0-%u\n", 7161 sdebug_store_sectors); 7162 7163 if (sdebug_fake_rw == 0 && !xa_empty(per_store_ap)) { 7164 struct sdeb_store_info *sip = xa_load(per_store_ap, 0); 7165 7166 if (sip) 7167 count = scnprintf(buf, PAGE_SIZE - 1, "%*pbl", 7168 (int)map_size, sip->map_storep); 7169 } 7170 buf[count++] = '\n'; 7171 buf[count] = '\0'; 7172 7173 return count; 7174 } 7175 static DRIVER_ATTR_RO(map); 7176 7177 static ssize_t random_show(struct device_driver *ddp, char *buf) 7178 { 7179 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_random); 7180 } 7181 7182 static ssize_t random_store(struct device_driver *ddp, const char *buf, 7183 size_t count) 7184 { 7185 bool v; 7186 7187 if (kstrtobool(buf, &v)) 7188 return -EINVAL; 7189 7190 sdebug_random = v; 7191 return count; 7192 } 7193 static DRIVER_ATTR_RW(random); 7194 7195 static ssize_t removable_show(struct device_driver *ddp, char *buf) 7196 { 7197 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_removable ? 1 : 0); 7198 } 7199 static ssize_t removable_store(struct device_driver *ddp, const char *buf, 7200 size_t count) 7201 { 7202 int n; 7203 7204 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) { 7205 sdebug_removable = (n > 0); 7206 return count; 7207 } 7208 return -EINVAL; 7209 } 7210 static DRIVER_ATTR_RW(removable); 7211 7212 static ssize_t host_lock_show(struct device_driver *ddp, char *buf) 7213 { 7214 return scnprintf(buf, PAGE_SIZE, "%d\n", !!sdebug_host_lock); 7215 } 7216 /* N.B. sdebug_host_lock does nothing, kept for backward compatibility */ 7217 static ssize_t host_lock_store(struct device_driver *ddp, const char *buf, 7218 size_t count) 7219 { 7220 int n; 7221 7222 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) { 7223 sdebug_host_lock = (n > 0); 7224 return count; 7225 } 7226 return -EINVAL; 7227 } 7228 static DRIVER_ATTR_RW(host_lock); 7229 7230 static ssize_t strict_show(struct device_driver *ddp, char *buf) 7231 { 7232 return scnprintf(buf, PAGE_SIZE, "%d\n", !!sdebug_strict); 7233 } 7234 static ssize_t strict_store(struct device_driver *ddp, const char *buf, 7235 size_t count) 7236 { 7237 int n; 7238 7239 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) { 7240 sdebug_strict = (n > 0); 7241 return count; 7242 } 7243 return -EINVAL; 7244 } 7245 static DRIVER_ATTR_RW(strict); 7246 7247 static ssize_t uuid_ctl_show(struct device_driver *ddp, char *buf) 7248 { 7249 return scnprintf(buf, PAGE_SIZE, "%d\n", !!sdebug_uuid_ctl); 7250 } 7251 static DRIVER_ATTR_RO(uuid_ctl); 7252 7253 static ssize_t cdb_len_show(struct device_driver *ddp, char *buf) 7254 { 7255 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_cdb_len); 7256 } 7257 static ssize_t cdb_len_store(struct device_driver *ddp, const char *buf, 7258 size_t count) 7259 { 7260 int ret, n; 7261 7262 ret = kstrtoint(buf, 0, &n); 7263 if (ret) 7264 return ret; 7265 sdebug_cdb_len = n; 7266 all_config_cdb_len(); 7267 return count; 7268 } 7269 static DRIVER_ATTR_RW(cdb_len); 7270 7271 static const char * const zbc_model_strs_a[] = { 7272 [BLK_ZONED_NONE] = "none", 7273 [BLK_ZONED_HA] = "host-aware", 7274 [BLK_ZONED_HM] = "host-managed", 7275 }; 7276 7277 static const char * const zbc_model_strs_b[] = { 7278 [BLK_ZONED_NONE] = "no", 7279 [BLK_ZONED_HA] = "aware", 7280 [BLK_ZONED_HM] = "managed", 7281 }; 7282 7283 static const char * const zbc_model_strs_c[] = { 7284 [BLK_ZONED_NONE] = "0", 7285 [BLK_ZONED_HA] = "1", 7286 [BLK_ZONED_HM] = "2", 7287 }; 7288 7289 static int sdeb_zbc_model_str(const char *cp) 7290 { 7291 int res = sysfs_match_string(zbc_model_strs_a, cp); 7292 7293 if (res < 0) { 7294 res = sysfs_match_string(zbc_model_strs_b, cp); 7295 if (res < 0) { 7296 res = sysfs_match_string(zbc_model_strs_c, cp); 7297 if (res < 0) 7298 return -EINVAL; 7299 } 7300 } 7301 return res; 7302 } 7303 7304 static ssize_t zbc_show(struct device_driver *ddp, char *buf) 7305 { 7306 return scnprintf(buf, PAGE_SIZE, "%s\n", 7307 zbc_model_strs_a[sdeb_zbc_model]); 7308 } 7309 static DRIVER_ATTR_RO(zbc); 7310 7311 static ssize_t tur_ms_to_ready_show(struct device_driver *ddp, char *buf) 7312 { 7313 return scnprintf(buf, PAGE_SIZE, "%d\n", sdeb_tur_ms_to_ready); 7314 } 7315 static DRIVER_ATTR_RO(tur_ms_to_ready); 7316 7317 static ssize_t group_number_stats_show(struct device_driver *ddp, char *buf) 7318 { 7319 char *p = buf, *end = buf + PAGE_SIZE; 7320 int i; 7321 7322 for (i = 0; i < ARRAY_SIZE(writes_by_group_number); i++) 7323 p += scnprintf(p, end - p, "%d %ld\n", i, 7324 atomic_long_read(&writes_by_group_number[i])); 7325 7326 return p - buf; 7327 } 7328 7329 static ssize_t group_number_stats_store(struct device_driver *ddp, 7330 const char *buf, size_t count) 7331 { 7332 int i; 7333 7334 for (i = 0; i < ARRAY_SIZE(writes_by_group_number); i++) 7335 atomic_long_set(&writes_by_group_number[i], 0); 7336 7337 return count; 7338 } 7339 static DRIVER_ATTR_RW(group_number_stats); 7340 7341 /* Note: The following array creates attribute files in the 7342 /sys/bus/pseudo/drivers/scsi_debug directory. The advantage of these 7343 files (over those found in the /sys/module/scsi_debug/parameters 7344 directory) is that auxiliary actions can be triggered when an attribute 7345 is changed. For example see: add_host_store() above. 7346 */ 7347 7348 static struct attribute *sdebug_drv_attrs[] = { 7349 &driver_attr_delay.attr, 7350 &driver_attr_opts.attr, 7351 &driver_attr_ptype.attr, 7352 &driver_attr_dsense.attr, 7353 &driver_attr_fake_rw.attr, 7354 &driver_attr_host_max_queue.attr, 7355 &driver_attr_no_lun_0.attr, 7356 &driver_attr_num_tgts.attr, 7357 &driver_attr_dev_size_mb.attr, 7358 &driver_attr_num_parts.attr, 7359 &driver_attr_every_nth.attr, 7360 &driver_attr_lun_format.attr, 7361 &driver_attr_max_luns.attr, 7362 &driver_attr_max_queue.attr, 7363 &driver_attr_no_rwlock.attr, 7364 &driver_attr_no_uld.attr, 7365 &driver_attr_scsi_level.attr, 7366 &driver_attr_virtual_gb.attr, 7367 &driver_attr_add_host.attr, 7368 &driver_attr_per_host_store.attr, 7369 &driver_attr_vpd_use_hostno.attr, 7370 &driver_attr_sector_size.attr, 7371 &driver_attr_statistics.attr, 7372 &driver_attr_submit_queues.attr, 7373 &driver_attr_dix.attr, 7374 &driver_attr_dif.attr, 7375 &driver_attr_guard.attr, 7376 &driver_attr_ato.attr, 7377 &driver_attr_map.attr, 7378 &driver_attr_random.attr, 7379 &driver_attr_removable.attr, 7380 &driver_attr_host_lock.attr, 7381 &driver_attr_ndelay.attr, 7382 &driver_attr_strict.attr, 7383 &driver_attr_uuid_ctl.attr, 7384 &driver_attr_cdb_len.attr, 7385 &driver_attr_tur_ms_to_ready.attr, 7386 &driver_attr_zbc.attr, 7387 &driver_attr_group_number_stats.attr, 7388 NULL, 7389 }; 7390 ATTRIBUTE_GROUPS(sdebug_drv); 7391 7392 static struct device *pseudo_primary; 7393 7394 static int __init scsi_debug_init(void) 7395 { 7396 bool want_store = (sdebug_fake_rw == 0); 7397 unsigned long sz; 7398 int k, ret, hosts_to_add; 7399 int idx = -1; 7400 7401 if (sdebug_ndelay >= 1000 * 1000 * 1000) { 7402 pr_warn("ndelay must be less than 1 second, ignored\n"); 7403 sdebug_ndelay = 0; 7404 } else if (sdebug_ndelay > 0) 7405 sdebug_jdelay = JDELAY_OVERRIDDEN; 7406 7407 switch (sdebug_sector_size) { 7408 case 512: 7409 case 1024: 7410 case 2048: 7411 case 4096: 7412 break; 7413 default: 7414 pr_err("invalid sector_size %d\n", sdebug_sector_size); 7415 return -EINVAL; 7416 } 7417 7418 switch (sdebug_dif) { 7419 case T10_PI_TYPE0_PROTECTION: 7420 break; 7421 case T10_PI_TYPE1_PROTECTION: 7422 case T10_PI_TYPE2_PROTECTION: 7423 case T10_PI_TYPE3_PROTECTION: 7424 have_dif_prot = true; 7425 break; 7426 7427 default: 7428 pr_err("dif must be 0, 1, 2 or 3\n"); 7429 return -EINVAL; 7430 } 7431 7432 if (sdebug_num_tgts < 0) { 7433 pr_err("num_tgts must be >= 0\n"); 7434 return -EINVAL; 7435 } 7436 7437 if (sdebug_guard > 1) { 7438 pr_err("guard must be 0 or 1\n"); 7439 return -EINVAL; 7440 } 7441 7442 if (sdebug_ato > 1) { 7443 pr_err("ato must be 0 or 1\n"); 7444 return -EINVAL; 7445 } 7446 7447 if (sdebug_physblk_exp > 15) { 7448 pr_err("invalid physblk_exp %u\n", sdebug_physblk_exp); 7449 return -EINVAL; 7450 } 7451 7452 sdebug_lun_am = sdebug_lun_am_i; 7453 if (sdebug_lun_am > SAM_LUN_AM_FLAT) { 7454 pr_warn("Invalid LUN format %u, using default\n", (int)sdebug_lun_am); 7455 sdebug_lun_am = SAM_LUN_AM_PERIPHERAL; 7456 } 7457 7458 if (sdebug_max_luns > 256) { 7459 if (sdebug_max_luns > 16384) { 7460 pr_warn("max_luns can be no more than 16384, use default\n"); 7461 sdebug_max_luns = DEF_MAX_LUNS; 7462 } 7463 sdebug_lun_am = SAM_LUN_AM_FLAT; 7464 } 7465 7466 if (sdebug_lowest_aligned > 0x3fff) { 7467 pr_err("lowest_aligned too big: %u\n", sdebug_lowest_aligned); 7468 return -EINVAL; 7469 } 7470 7471 if (submit_queues < 1) { 7472 pr_err("submit_queues must be 1 or more\n"); 7473 return -EINVAL; 7474 } 7475 7476 if ((sdebug_max_queue > SDEBUG_CANQUEUE) || (sdebug_max_queue < 1)) { 7477 pr_err("max_queue must be in range [1, %d]\n", SDEBUG_CANQUEUE); 7478 return -EINVAL; 7479 } 7480 7481 if ((sdebug_host_max_queue > SDEBUG_CANQUEUE) || 7482 (sdebug_host_max_queue < 0)) { 7483 pr_err("host_max_queue must be in range [0 %d]\n", 7484 SDEBUG_CANQUEUE); 7485 return -EINVAL; 7486 } 7487 7488 if (sdebug_host_max_queue && 7489 (sdebug_max_queue != sdebug_host_max_queue)) { 7490 sdebug_max_queue = sdebug_host_max_queue; 7491 pr_warn("fixing max submit queue depth to host max queue depth, %d\n", 7492 sdebug_max_queue); 7493 } 7494 7495 /* 7496 * check for host managed zoned block device specified with 7497 * ptype=0x14 or zbc=XXX. 7498 */ 7499 if (sdebug_ptype == TYPE_ZBC) { 7500 sdeb_zbc_model = BLK_ZONED_HM; 7501 } else if (sdeb_zbc_model_s && *sdeb_zbc_model_s) { 7502 k = sdeb_zbc_model_str(sdeb_zbc_model_s); 7503 if (k < 0) 7504 return k; 7505 sdeb_zbc_model = k; 7506 switch (sdeb_zbc_model) { 7507 case BLK_ZONED_NONE: 7508 case BLK_ZONED_HA: 7509 sdebug_ptype = TYPE_DISK; 7510 break; 7511 case BLK_ZONED_HM: 7512 sdebug_ptype = TYPE_ZBC; 7513 break; 7514 default: 7515 pr_err("Invalid ZBC model\n"); 7516 return -EINVAL; 7517 } 7518 } 7519 if (sdeb_zbc_model != BLK_ZONED_NONE) { 7520 sdeb_zbc_in_use = true; 7521 if (sdebug_dev_size_mb == DEF_DEV_SIZE_PRE_INIT) 7522 sdebug_dev_size_mb = DEF_ZBC_DEV_SIZE_MB; 7523 } 7524 7525 if (sdebug_dev_size_mb == DEF_DEV_SIZE_PRE_INIT) 7526 sdebug_dev_size_mb = DEF_DEV_SIZE_MB; 7527 if (sdebug_dev_size_mb < 1) 7528 sdebug_dev_size_mb = 1; /* force minimum 1 MB ramdisk */ 7529 sz = (unsigned long)sdebug_dev_size_mb * 1048576; 7530 sdebug_store_sectors = sz / sdebug_sector_size; 7531 sdebug_capacity = get_sdebug_capacity(); 7532 7533 /* play around with geometry, don't waste too much on track 0 */ 7534 sdebug_heads = 8; 7535 sdebug_sectors_per = 32; 7536 if (sdebug_dev_size_mb >= 256) 7537 sdebug_heads = 64; 7538 else if (sdebug_dev_size_mb >= 16) 7539 sdebug_heads = 32; 7540 sdebug_cylinders_per = (unsigned long)sdebug_capacity / 7541 (sdebug_sectors_per * sdebug_heads); 7542 if (sdebug_cylinders_per >= 1024) { 7543 /* other LLDs do this; implies >= 1GB ram disk ... */ 7544 sdebug_heads = 255; 7545 sdebug_sectors_per = 63; 7546 sdebug_cylinders_per = (unsigned long)sdebug_capacity / 7547 (sdebug_sectors_per * sdebug_heads); 7548 } 7549 if (scsi_debug_lbp()) { 7550 sdebug_unmap_max_blocks = 7551 clamp(sdebug_unmap_max_blocks, 0U, 0xffffffffU); 7552 7553 sdebug_unmap_max_desc = 7554 clamp(sdebug_unmap_max_desc, 0U, 256U); 7555 7556 sdebug_unmap_granularity = 7557 clamp(sdebug_unmap_granularity, 1U, 0xffffffffU); 7558 7559 if (sdebug_unmap_alignment && 7560 sdebug_unmap_granularity <= 7561 sdebug_unmap_alignment) { 7562 pr_err("ERR: unmap_granularity <= unmap_alignment\n"); 7563 return -EINVAL; 7564 } 7565 } 7566 xa_init_flags(per_store_ap, XA_FLAGS_ALLOC | XA_FLAGS_LOCK_IRQ); 7567 if (want_store) { 7568 idx = sdebug_add_store(); 7569 if (idx < 0) 7570 return idx; 7571 } 7572 7573 pseudo_primary = root_device_register("pseudo_0"); 7574 if (IS_ERR(pseudo_primary)) { 7575 pr_warn("root_device_register() error\n"); 7576 ret = PTR_ERR(pseudo_primary); 7577 goto free_vm; 7578 } 7579 ret = bus_register(&pseudo_lld_bus); 7580 if (ret < 0) { 7581 pr_warn("bus_register error: %d\n", ret); 7582 goto dev_unreg; 7583 } 7584 ret = driver_register(&sdebug_driverfs_driver); 7585 if (ret < 0) { 7586 pr_warn("driver_register error: %d\n", ret); 7587 goto bus_unreg; 7588 } 7589 7590 hosts_to_add = sdebug_add_host; 7591 sdebug_add_host = 0; 7592 7593 queued_cmd_cache = KMEM_CACHE(sdebug_queued_cmd, SLAB_HWCACHE_ALIGN); 7594 if (!queued_cmd_cache) { 7595 ret = -ENOMEM; 7596 goto driver_unreg; 7597 } 7598 7599 sdebug_debugfs_root = debugfs_create_dir("scsi_debug", NULL); 7600 if (IS_ERR_OR_NULL(sdebug_debugfs_root)) 7601 pr_info("%s: failed to create initial debugfs directory\n", __func__); 7602 7603 for (k = 0; k < hosts_to_add; k++) { 7604 if (want_store && k == 0) { 7605 ret = sdebug_add_host_helper(idx); 7606 if (ret < 0) { 7607 pr_err("add_host_helper k=%d, error=%d\n", 7608 k, -ret); 7609 break; 7610 } 7611 } else { 7612 ret = sdebug_do_add_host(want_store && 7613 sdebug_per_host_store); 7614 if (ret < 0) { 7615 pr_err("add_host k=%d error=%d\n", k, -ret); 7616 break; 7617 } 7618 } 7619 } 7620 if (sdebug_verbose) 7621 pr_info("built %d host(s)\n", sdebug_num_hosts); 7622 7623 return 0; 7624 7625 driver_unreg: 7626 driver_unregister(&sdebug_driverfs_driver); 7627 bus_unreg: 7628 bus_unregister(&pseudo_lld_bus); 7629 dev_unreg: 7630 root_device_unregister(pseudo_primary); 7631 free_vm: 7632 sdebug_erase_store(idx, NULL); 7633 return ret; 7634 } 7635 7636 static void __exit scsi_debug_exit(void) 7637 { 7638 int k = sdebug_num_hosts; 7639 7640 for (; k; k--) 7641 sdebug_do_remove_host(true); 7642 kmem_cache_destroy(queued_cmd_cache); 7643 driver_unregister(&sdebug_driverfs_driver); 7644 bus_unregister(&pseudo_lld_bus); 7645 root_device_unregister(pseudo_primary); 7646 7647 sdebug_erase_all_stores(false); 7648 xa_destroy(per_store_ap); 7649 debugfs_remove(sdebug_debugfs_root); 7650 } 7651 7652 device_initcall(scsi_debug_init); 7653 module_exit(scsi_debug_exit); 7654 7655 static void sdebug_release_adapter(struct device *dev) 7656 { 7657 struct sdebug_host_info *sdbg_host; 7658 7659 sdbg_host = dev_to_sdebug_host(dev); 7660 kfree(sdbg_host); 7661 } 7662 7663 /* idx must be valid, if sip is NULL then it will be obtained using idx */ 7664 static void sdebug_erase_store(int idx, struct sdeb_store_info *sip) 7665 { 7666 if (idx < 0) 7667 return; 7668 if (!sip) { 7669 if (xa_empty(per_store_ap)) 7670 return; 7671 sip = xa_load(per_store_ap, idx); 7672 if (!sip) 7673 return; 7674 } 7675 vfree(sip->map_storep); 7676 vfree(sip->dif_storep); 7677 vfree(sip->storep); 7678 xa_erase(per_store_ap, idx); 7679 kfree(sip); 7680 } 7681 7682 /* Assume apart_from_first==false only in shutdown case. */ 7683 static void sdebug_erase_all_stores(bool apart_from_first) 7684 { 7685 unsigned long idx; 7686 struct sdeb_store_info *sip = NULL; 7687 7688 xa_for_each(per_store_ap, idx, sip) { 7689 if (apart_from_first) 7690 apart_from_first = false; 7691 else 7692 sdebug_erase_store(idx, sip); 7693 } 7694 if (apart_from_first) 7695 sdeb_most_recent_idx = sdeb_first_idx; 7696 } 7697 7698 /* 7699 * Returns store xarray new element index (idx) if >=0 else negated errno. 7700 * Limit the number of stores to 65536. 7701 */ 7702 static int sdebug_add_store(void) 7703 { 7704 int res; 7705 u32 n_idx; 7706 unsigned long iflags; 7707 unsigned long sz = (unsigned long)sdebug_dev_size_mb * 1048576; 7708 struct sdeb_store_info *sip = NULL; 7709 struct xa_limit xal = { .max = 1 << 16, .min = 0 }; 7710 7711 sip = kzalloc(sizeof(*sip), GFP_KERNEL); 7712 if (!sip) 7713 return -ENOMEM; 7714 7715 xa_lock_irqsave(per_store_ap, iflags); 7716 res = __xa_alloc(per_store_ap, &n_idx, sip, xal, GFP_ATOMIC); 7717 if (unlikely(res < 0)) { 7718 xa_unlock_irqrestore(per_store_ap, iflags); 7719 kfree(sip); 7720 pr_warn("%s: xa_alloc() errno=%d\n", __func__, -res); 7721 return res; 7722 } 7723 sdeb_most_recent_idx = n_idx; 7724 if (sdeb_first_idx < 0) 7725 sdeb_first_idx = n_idx; 7726 xa_unlock_irqrestore(per_store_ap, iflags); 7727 7728 res = -ENOMEM; 7729 sip->storep = vzalloc(sz); 7730 if (!sip->storep) { 7731 pr_err("user data oom\n"); 7732 goto err; 7733 } 7734 if (sdebug_num_parts > 0) 7735 sdebug_build_parts(sip->storep, sz); 7736 7737 /* DIF/DIX: what T10 calls Protection Information (PI) */ 7738 if (sdebug_dix) { 7739 int dif_size; 7740 7741 dif_size = sdebug_store_sectors * sizeof(struct t10_pi_tuple); 7742 sip->dif_storep = vmalloc(dif_size); 7743 7744 pr_info("dif_storep %u bytes @ %pK\n", dif_size, 7745 sip->dif_storep); 7746 7747 if (!sip->dif_storep) { 7748 pr_err("DIX oom\n"); 7749 goto err; 7750 } 7751 memset(sip->dif_storep, 0xff, dif_size); 7752 } 7753 /* Logical Block Provisioning */ 7754 if (scsi_debug_lbp()) { 7755 map_size = lba_to_map_index(sdebug_store_sectors - 1) + 1; 7756 sip->map_storep = vmalloc(array_size(sizeof(long), 7757 BITS_TO_LONGS(map_size))); 7758 7759 pr_info("%lu provisioning blocks\n", map_size); 7760 7761 if (!sip->map_storep) { 7762 pr_err("LBP map oom\n"); 7763 goto err; 7764 } 7765 7766 bitmap_zero(sip->map_storep, map_size); 7767 7768 /* Map first 1KB for partition table */ 7769 if (sdebug_num_parts) 7770 map_region(sip, 0, 2); 7771 } 7772 7773 rwlock_init(&sip->macc_lck); 7774 return (int)n_idx; 7775 err: 7776 sdebug_erase_store((int)n_idx, sip); 7777 pr_warn("%s: failed, errno=%d\n", __func__, -res); 7778 return res; 7779 } 7780 7781 static int sdebug_add_host_helper(int per_host_idx) 7782 { 7783 int k, devs_per_host, idx; 7784 int error = -ENOMEM; 7785 struct sdebug_host_info *sdbg_host; 7786 struct sdebug_dev_info *sdbg_devinfo, *tmp; 7787 7788 sdbg_host = kzalloc(sizeof(*sdbg_host), GFP_KERNEL); 7789 if (!sdbg_host) 7790 return -ENOMEM; 7791 idx = (per_host_idx < 0) ? sdeb_first_idx : per_host_idx; 7792 if (xa_get_mark(per_store_ap, idx, SDEB_XA_NOT_IN_USE)) 7793 xa_clear_mark(per_store_ap, idx, SDEB_XA_NOT_IN_USE); 7794 sdbg_host->si_idx = idx; 7795 7796 INIT_LIST_HEAD(&sdbg_host->dev_info_list); 7797 7798 devs_per_host = sdebug_num_tgts * sdebug_max_luns; 7799 for (k = 0; k < devs_per_host; k++) { 7800 sdbg_devinfo = sdebug_device_create(sdbg_host, GFP_KERNEL); 7801 if (!sdbg_devinfo) 7802 goto clean; 7803 } 7804 7805 mutex_lock(&sdebug_host_list_mutex); 7806 list_add_tail(&sdbg_host->host_list, &sdebug_host_list); 7807 mutex_unlock(&sdebug_host_list_mutex); 7808 7809 sdbg_host->dev.bus = &pseudo_lld_bus; 7810 sdbg_host->dev.parent = pseudo_primary; 7811 sdbg_host->dev.release = &sdebug_release_adapter; 7812 dev_set_name(&sdbg_host->dev, "adapter%d", sdebug_num_hosts); 7813 7814 error = device_register(&sdbg_host->dev); 7815 if (error) { 7816 mutex_lock(&sdebug_host_list_mutex); 7817 list_del(&sdbg_host->host_list); 7818 mutex_unlock(&sdebug_host_list_mutex); 7819 goto clean; 7820 } 7821 7822 ++sdebug_num_hosts; 7823 return 0; 7824 7825 clean: 7826 list_for_each_entry_safe(sdbg_devinfo, tmp, &sdbg_host->dev_info_list, 7827 dev_list) { 7828 list_del(&sdbg_devinfo->dev_list); 7829 kfree(sdbg_devinfo->zstate); 7830 kfree(sdbg_devinfo); 7831 } 7832 if (sdbg_host->dev.release) 7833 put_device(&sdbg_host->dev); 7834 else 7835 kfree(sdbg_host); 7836 pr_warn("%s: failed, errno=%d\n", __func__, -error); 7837 return error; 7838 } 7839 7840 static int sdebug_do_add_host(bool mk_new_store) 7841 { 7842 int ph_idx = sdeb_most_recent_idx; 7843 7844 if (mk_new_store) { 7845 ph_idx = sdebug_add_store(); 7846 if (ph_idx < 0) 7847 return ph_idx; 7848 } 7849 return sdebug_add_host_helper(ph_idx); 7850 } 7851 7852 static void sdebug_do_remove_host(bool the_end) 7853 { 7854 int idx = -1; 7855 struct sdebug_host_info *sdbg_host = NULL; 7856 struct sdebug_host_info *sdbg_host2; 7857 7858 mutex_lock(&sdebug_host_list_mutex); 7859 if (!list_empty(&sdebug_host_list)) { 7860 sdbg_host = list_entry(sdebug_host_list.prev, 7861 struct sdebug_host_info, host_list); 7862 idx = sdbg_host->si_idx; 7863 } 7864 if (!the_end && idx >= 0) { 7865 bool unique = true; 7866 7867 list_for_each_entry(sdbg_host2, &sdebug_host_list, host_list) { 7868 if (sdbg_host2 == sdbg_host) 7869 continue; 7870 if (idx == sdbg_host2->si_idx) { 7871 unique = false; 7872 break; 7873 } 7874 } 7875 if (unique) { 7876 xa_set_mark(per_store_ap, idx, SDEB_XA_NOT_IN_USE); 7877 if (idx == sdeb_most_recent_idx) 7878 --sdeb_most_recent_idx; 7879 } 7880 } 7881 if (sdbg_host) 7882 list_del(&sdbg_host->host_list); 7883 mutex_unlock(&sdebug_host_list_mutex); 7884 7885 if (!sdbg_host) 7886 return; 7887 7888 device_unregister(&sdbg_host->dev); 7889 --sdebug_num_hosts; 7890 } 7891 7892 static int sdebug_change_qdepth(struct scsi_device *sdev, int qdepth) 7893 { 7894 struct sdebug_dev_info *devip = sdev->hostdata; 7895 7896 if (!devip) 7897 return -ENODEV; 7898 7899 mutex_lock(&sdebug_host_list_mutex); 7900 block_unblock_all_queues(true); 7901 7902 if (qdepth > SDEBUG_CANQUEUE) { 7903 qdepth = SDEBUG_CANQUEUE; 7904 pr_warn("%s: requested qdepth [%d] exceeds canqueue [%d], trim\n", __func__, 7905 qdepth, SDEBUG_CANQUEUE); 7906 } 7907 if (qdepth < 1) 7908 qdepth = 1; 7909 if (qdepth != sdev->queue_depth) 7910 scsi_change_queue_depth(sdev, qdepth); 7911 7912 block_unblock_all_queues(false); 7913 mutex_unlock(&sdebug_host_list_mutex); 7914 7915 if (SDEBUG_OPT_Q_NOISE & sdebug_opts) 7916 sdev_printk(KERN_INFO, sdev, "%s: qdepth=%d\n", __func__, qdepth); 7917 7918 return sdev->queue_depth; 7919 } 7920 7921 static bool fake_timeout(struct scsi_cmnd *scp) 7922 { 7923 if (0 == (atomic_read(&sdebug_cmnd_count) % abs(sdebug_every_nth))) { 7924 if (sdebug_every_nth < -1) 7925 sdebug_every_nth = -1; 7926 if (SDEBUG_OPT_TIMEOUT & sdebug_opts) 7927 return true; /* ignore command causing timeout */ 7928 else if (SDEBUG_OPT_MAC_TIMEOUT & sdebug_opts && 7929 scsi_medium_access_command(scp)) 7930 return true; /* time out reads and writes */ 7931 } 7932 return false; 7933 } 7934 7935 /* Response to TUR or media access command when device stopped */ 7936 static int resp_not_ready(struct scsi_cmnd *scp, struct sdebug_dev_info *devip) 7937 { 7938 int stopped_state; 7939 u64 diff_ns = 0; 7940 ktime_t now_ts = ktime_get_boottime(); 7941 struct scsi_device *sdp = scp->device; 7942 7943 stopped_state = atomic_read(&devip->stopped); 7944 if (stopped_state == 2) { 7945 if (ktime_to_ns(now_ts) > ktime_to_ns(devip->create_ts)) { 7946 diff_ns = ktime_to_ns(ktime_sub(now_ts, devip->create_ts)); 7947 if (diff_ns >= ((u64)sdeb_tur_ms_to_ready * 1000000)) { 7948 /* tur_ms_to_ready timer extinguished */ 7949 atomic_set(&devip->stopped, 0); 7950 return 0; 7951 } 7952 } 7953 mk_sense_buffer(scp, NOT_READY, LOGICAL_UNIT_NOT_READY, 0x1); 7954 if (sdebug_verbose) 7955 sdev_printk(KERN_INFO, sdp, 7956 "%s: Not ready: in process of becoming ready\n", my_name); 7957 if (scp->cmnd[0] == TEST_UNIT_READY) { 7958 u64 tur_nanosecs_to_ready = (u64)sdeb_tur_ms_to_ready * 1000000; 7959 7960 if (diff_ns <= tur_nanosecs_to_ready) 7961 diff_ns = tur_nanosecs_to_ready - diff_ns; 7962 else 7963 diff_ns = tur_nanosecs_to_ready; 7964 /* As per 20-061r2 approved for spc6 by T10 on 20200716 */ 7965 do_div(diff_ns, 1000000); /* diff_ns becomes milliseconds */ 7966 scsi_set_sense_information(scp->sense_buffer, SCSI_SENSE_BUFFERSIZE, 7967 diff_ns); 7968 return check_condition_result; 7969 } 7970 } 7971 mk_sense_buffer(scp, NOT_READY, LOGICAL_UNIT_NOT_READY, 0x2); 7972 if (sdebug_verbose) 7973 sdev_printk(KERN_INFO, sdp, "%s: Not ready: initializing command required\n", 7974 my_name); 7975 return check_condition_result; 7976 } 7977 7978 static void sdebug_map_queues(struct Scsi_Host *shost) 7979 { 7980 int i, qoff; 7981 7982 if (shost->nr_hw_queues == 1) 7983 return; 7984 7985 for (i = 0, qoff = 0; i < HCTX_MAX_TYPES; i++) { 7986 struct blk_mq_queue_map *map = &shost->tag_set.map[i]; 7987 7988 map->nr_queues = 0; 7989 7990 if (i == HCTX_TYPE_DEFAULT) 7991 map->nr_queues = submit_queues - poll_queues; 7992 else if (i == HCTX_TYPE_POLL) 7993 map->nr_queues = poll_queues; 7994 7995 if (!map->nr_queues) { 7996 BUG_ON(i == HCTX_TYPE_DEFAULT); 7997 continue; 7998 } 7999 8000 map->queue_offset = qoff; 8001 blk_mq_map_queues(map); 8002 8003 qoff += map->nr_queues; 8004 } 8005 } 8006 8007 struct sdebug_blk_mq_poll_data { 8008 unsigned int queue_num; 8009 int *num_entries; 8010 }; 8011 8012 /* 8013 * We don't handle aborted commands here, but it does not seem possible to have 8014 * aborted polled commands from schedule_resp() 8015 */ 8016 static bool sdebug_blk_mq_poll_iter(struct request *rq, void *opaque) 8017 { 8018 struct sdebug_blk_mq_poll_data *data = opaque; 8019 struct scsi_cmnd *cmd = blk_mq_rq_to_pdu(rq); 8020 struct sdebug_scsi_cmd *sdsc = scsi_cmd_priv(cmd); 8021 struct sdebug_defer *sd_dp; 8022 u32 unique_tag = blk_mq_unique_tag(rq); 8023 u16 hwq = blk_mq_unique_tag_to_hwq(unique_tag); 8024 struct sdebug_queued_cmd *sqcp; 8025 unsigned long flags; 8026 int queue_num = data->queue_num; 8027 ktime_t time; 8028 8029 /* We're only interested in one queue for this iteration */ 8030 if (hwq != queue_num) 8031 return true; 8032 8033 /* Subsequent checks would fail if this failed, but check anyway */ 8034 if (!test_bit(SCMD_STATE_INFLIGHT, &cmd->state)) 8035 return true; 8036 8037 time = ktime_get_boottime(); 8038 8039 spin_lock_irqsave(&sdsc->lock, flags); 8040 sqcp = TO_QUEUED_CMD(cmd); 8041 if (!sqcp) { 8042 spin_unlock_irqrestore(&sdsc->lock, flags); 8043 return true; 8044 } 8045 8046 sd_dp = &sqcp->sd_dp; 8047 if (READ_ONCE(sd_dp->defer_t) != SDEB_DEFER_POLL) { 8048 spin_unlock_irqrestore(&sdsc->lock, flags); 8049 return true; 8050 } 8051 8052 if (time < sd_dp->cmpl_ts) { 8053 spin_unlock_irqrestore(&sdsc->lock, flags); 8054 return true; 8055 } 8056 8057 ASSIGN_QUEUED_CMD(cmd, NULL); 8058 spin_unlock_irqrestore(&sdsc->lock, flags); 8059 8060 if (sdebug_statistics) { 8061 atomic_inc(&sdebug_completions); 8062 if (raw_smp_processor_id() != sd_dp->issuing_cpu) 8063 atomic_inc(&sdebug_miss_cpus); 8064 } 8065 8066 sdebug_free_queued_cmd(sqcp); 8067 8068 scsi_done(cmd); /* callback to mid level */ 8069 (*data->num_entries)++; 8070 return true; 8071 } 8072 8073 static int sdebug_blk_mq_poll(struct Scsi_Host *shost, unsigned int queue_num) 8074 { 8075 int num_entries = 0; 8076 struct sdebug_blk_mq_poll_data data = { 8077 .queue_num = queue_num, 8078 .num_entries = &num_entries, 8079 }; 8080 8081 blk_mq_tagset_busy_iter(&shost->tag_set, sdebug_blk_mq_poll_iter, 8082 &data); 8083 8084 if (num_entries > 0) 8085 atomic_add(num_entries, &sdeb_mq_poll_count); 8086 return num_entries; 8087 } 8088 8089 static int sdebug_timeout_cmd(struct scsi_cmnd *cmnd) 8090 { 8091 struct scsi_device *sdp = cmnd->device; 8092 struct sdebug_dev_info *devip = (struct sdebug_dev_info *)sdp->hostdata; 8093 struct sdebug_err_inject *err; 8094 unsigned char *cmd = cmnd->cmnd; 8095 int ret = 0; 8096 8097 if (devip == NULL) 8098 return 0; 8099 8100 rcu_read_lock(); 8101 list_for_each_entry_rcu(err, &devip->inject_err_list, list) { 8102 if (err->type == ERR_TMOUT_CMD && 8103 (err->cmd == cmd[0] || err->cmd == 0xff)) { 8104 ret = !!err->cnt; 8105 if (err->cnt < 0) 8106 err->cnt++; 8107 8108 rcu_read_unlock(); 8109 return ret; 8110 } 8111 } 8112 rcu_read_unlock(); 8113 8114 return 0; 8115 } 8116 8117 static int sdebug_fail_queue_cmd(struct scsi_cmnd *cmnd) 8118 { 8119 struct scsi_device *sdp = cmnd->device; 8120 struct sdebug_dev_info *devip = (struct sdebug_dev_info *)sdp->hostdata; 8121 struct sdebug_err_inject *err; 8122 unsigned char *cmd = cmnd->cmnd; 8123 int ret = 0; 8124 8125 if (devip == NULL) 8126 return 0; 8127 8128 rcu_read_lock(); 8129 list_for_each_entry_rcu(err, &devip->inject_err_list, list) { 8130 if (err->type == ERR_FAIL_QUEUE_CMD && 8131 (err->cmd == cmd[0] || err->cmd == 0xff)) { 8132 ret = err->cnt ? err->queuecmd_ret : 0; 8133 if (err->cnt < 0) 8134 err->cnt++; 8135 8136 rcu_read_unlock(); 8137 return ret; 8138 } 8139 } 8140 rcu_read_unlock(); 8141 8142 return 0; 8143 } 8144 8145 static int sdebug_fail_cmd(struct scsi_cmnd *cmnd, int *retval, 8146 struct sdebug_err_inject *info) 8147 { 8148 struct scsi_device *sdp = cmnd->device; 8149 struct sdebug_dev_info *devip = (struct sdebug_dev_info *)sdp->hostdata; 8150 struct sdebug_err_inject *err; 8151 unsigned char *cmd = cmnd->cmnd; 8152 int ret = 0; 8153 int result; 8154 8155 if (devip == NULL) 8156 return 0; 8157 8158 rcu_read_lock(); 8159 list_for_each_entry_rcu(err, &devip->inject_err_list, list) { 8160 if (err->type == ERR_FAIL_CMD && 8161 (err->cmd == cmd[0] || err->cmd == 0xff)) { 8162 if (!err->cnt) { 8163 rcu_read_unlock(); 8164 return 0; 8165 } 8166 8167 ret = !!err->cnt; 8168 rcu_read_unlock(); 8169 goto out_handle; 8170 } 8171 } 8172 rcu_read_unlock(); 8173 8174 return 0; 8175 8176 out_handle: 8177 if (err->cnt < 0) 8178 err->cnt++; 8179 mk_sense_buffer(cmnd, err->sense_key, err->asc, err->asq); 8180 result = err->status_byte | err->host_byte << 16 | err->driver_byte << 24; 8181 *info = *err; 8182 *retval = schedule_resp(cmnd, devip, result, NULL, 0, 0); 8183 8184 return ret; 8185 } 8186 8187 static int scsi_debug_queuecommand(struct Scsi_Host *shost, 8188 struct scsi_cmnd *scp) 8189 { 8190 u8 sdeb_i; 8191 struct scsi_device *sdp = scp->device; 8192 const struct opcode_info_t *oip; 8193 const struct opcode_info_t *r_oip; 8194 struct sdebug_dev_info *devip; 8195 u8 *cmd = scp->cmnd; 8196 int (*r_pfp)(struct scsi_cmnd *, struct sdebug_dev_info *); 8197 int (*pfp)(struct scsi_cmnd *, struct sdebug_dev_info *) = NULL; 8198 int k, na; 8199 int errsts = 0; 8200 u64 lun_index = sdp->lun & 0x3FFF; 8201 u32 flags; 8202 u16 sa; 8203 u8 opcode = cmd[0]; 8204 bool has_wlun_rl; 8205 bool inject_now; 8206 int ret = 0; 8207 struct sdebug_err_inject err; 8208 8209 scsi_set_resid(scp, 0); 8210 if (sdebug_statistics) { 8211 atomic_inc(&sdebug_cmnd_count); 8212 inject_now = inject_on_this_cmd(); 8213 } else { 8214 inject_now = false; 8215 } 8216 if (unlikely(sdebug_verbose && 8217 !(SDEBUG_OPT_NO_CDB_NOISE & sdebug_opts))) { 8218 char b[120]; 8219 int n, len, sb; 8220 8221 len = scp->cmd_len; 8222 sb = (int)sizeof(b); 8223 if (len > 32) 8224 strcpy(b, "too long, over 32 bytes"); 8225 else { 8226 for (k = 0, n = 0; k < len && n < sb; ++k) 8227 n += scnprintf(b + n, sb - n, "%02x ", 8228 (u32)cmd[k]); 8229 } 8230 sdev_printk(KERN_INFO, sdp, "%s: tag=%#x, cmd %s\n", my_name, 8231 blk_mq_unique_tag(scsi_cmd_to_rq(scp)), b); 8232 } 8233 if (unlikely(inject_now && (sdebug_opts & SDEBUG_OPT_HOST_BUSY))) 8234 return SCSI_MLQUEUE_HOST_BUSY; 8235 has_wlun_rl = (sdp->lun == SCSI_W_LUN_REPORT_LUNS); 8236 if (unlikely(lun_index >= sdebug_max_luns && !has_wlun_rl)) 8237 goto err_out; 8238 8239 sdeb_i = opcode_ind_arr[opcode]; /* fully mapped */ 8240 oip = &opcode_info_arr[sdeb_i]; /* safe if table consistent */ 8241 devip = (struct sdebug_dev_info *)sdp->hostdata; 8242 if (unlikely(!devip)) { 8243 devip = find_build_dev_info(sdp); 8244 if (NULL == devip) 8245 goto err_out; 8246 } 8247 8248 if (sdebug_timeout_cmd(scp)) { 8249 scmd_printk(KERN_INFO, scp, "timeout command 0x%x\n", opcode); 8250 return 0; 8251 } 8252 8253 ret = sdebug_fail_queue_cmd(scp); 8254 if (ret) { 8255 scmd_printk(KERN_INFO, scp, "fail queue command 0x%x with 0x%x\n", 8256 opcode, ret); 8257 return ret; 8258 } 8259 8260 if (sdebug_fail_cmd(scp, &ret, &err)) { 8261 scmd_printk(KERN_INFO, scp, 8262 "fail command 0x%x with hostbyte=0x%x, " 8263 "driverbyte=0x%x, statusbyte=0x%x, " 8264 "sense_key=0x%x, asc=0x%x, asq=0x%x\n", 8265 opcode, err.host_byte, err.driver_byte, 8266 err.status_byte, err.sense_key, err.asc, err.asq); 8267 return ret; 8268 } 8269 8270 if (unlikely(inject_now && !atomic_read(&sdeb_inject_pending))) 8271 atomic_set(&sdeb_inject_pending, 1); 8272 8273 na = oip->num_attached; 8274 r_pfp = oip->pfp; 8275 if (na) { /* multiple commands with this opcode */ 8276 r_oip = oip; 8277 if (FF_SA & r_oip->flags) { 8278 if (F_SA_LOW & oip->flags) 8279 sa = 0x1f & cmd[1]; 8280 else 8281 sa = get_unaligned_be16(cmd + 8); 8282 for (k = 0; k <= na; oip = r_oip->arrp + k++) { 8283 if (opcode == oip->opcode && sa == oip->sa) 8284 break; 8285 } 8286 } else { /* since no service action only check opcode */ 8287 for (k = 0; k <= na; oip = r_oip->arrp + k++) { 8288 if (opcode == oip->opcode) 8289 break; 8290 } 8291 } 8292 if (k > na) { 8293 if (F_SA_LOW & r_oip->flags) 8294 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 4); 8295 else if (F_SA_HIGH & r_oip->flags) 8296 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 8, 7); 8297 else 8298 mk_sense_invalid_opcode(scp); 8299 goto check_cond; 8300 } 8301 } /* else (when na==0) we assume the oip is a match */ 8302 flags = oip->flags; 8303 if (unlikely(F_INV_OP & flags)) { 8304 mk_sense_invalid_opcode(scp); 8305 goto check_cond; 8306 } 8307 if (unlikely(has_wlun_rl && !(F_RL_WLUN_OK & flags))) { 8308 if (sdebug_verbose) 8309 sdev_printk(KERN_INFO, sdp, "%s: Opcode 0x%x not%s\n", 8310 my_name, opcode, " supported for wlun"); 8311 mk_sense_invalid_opcode(scp); 8312 goto check_cond; 8313 } 8314 if (unlikely(sdebug_strict)) { /* check cdb against mask */ 8315 u8 rem; 8316 int j; 8317 8318 for (k = 1; k < oip->len_mask[0] && k < 16; ++k) { 8319 rem = ~oip->len_mask[k] & cmd[k]; 8320 if (rem) { 8321 for (j = 7; j >= 0; --j, rem <<= 1) { 8322 if (0x80 & rem) 8323 break; 8324 } 8325 mk_sense_invalid_fld(scp, SDEB_IN_CDB, k, j); 8326 goto check_cond; 8327 } 8328 } 8329 } 8330 if (unlikely(!(F_SKIP_UA & flags) && 8331 find_first_bit(devip->uas_bm, 8332 SDEBUG_NUM_UAS) != SDEBUG_NUM_UAS)) { 8333 errsts = make_ua(scp, devip); 8334 if (errsts) 8335 goto check_cond; 8336 } 8337 if (unlikely(((F_M_ACCESS & flags) || scp->cmnd[0] == TEST_UNIT_READY) && 8338 atomic_read(&devip->stopped))) { 8339 errsts = resp_not_ready(scp, devip); 8340 if (errsts) 8341 goto fini; 8342 } 8343 if (sdebug_fake_rw && (F_FAKE_RW & flags)) 8344 goto fini; 8345 if (unlikely(sdebug_every_nth)) { 8346 if (fake_timeout(scp)) 8347 return 0; /* ignore command: make trouble */ 8348 } 8349 if (likely(oip->pfp)) 8350 pfp = oip->pfp; /* calls a resp_* function */ 8351 else 8352 pfp = r_pfp; /* if leaf function ptr NULL, try the root's */ 8353 8354 fini: 8355 if (F_DELAY_OVERR & flags) /* cmds like INQUIRY respond asap */ 8356 return schedule_resp(scp, devip, errsts, pfp, 0, 0); 8357 else if ((flags & F_LONG_DELAY) && (sdebug_jdelay > 0 || 8358 sdebug_ndelay > 10000)) { 8359 /* 8360 * Skip long delays if ndelay <= 10 microseconds. Otherwise 8361 * for Start Stop Unit (SSU) want at least 1 second delay and 8362 * if sdebug_jdelay>1 want a long delay of that many seconds. 8363 * For Synchronize Cache want 1/20 of SSU's delay. 8364 */ 8365 int jdelay = (sdebug_jdelay < 2) ? 1 : sdebug_jdelay; 8366 int denom = (flags & F_SYNC_DELAY) ? 20 : 1; 8367 8368 jdelay = mult_frac(USER_HZ * jdelay, HZ, denom * USER_HZ); 8369 return schedule_resp(scp, devip, errsts, pfp, jdelay, 0); 8370 } else 8371 return schedule_resp(scp, devip, errsts, pfp, sdebug_jdelay, 8372 sdebug_ndelay); 8373 check_cond: 8374 return schedule_resp(scp, devip, check_condition_result, NULL, 0, 0); 8375 err_out: 8376 return schedule_resp(scp, NULL, DID_NO_CONNECT << 16, NULL, 0, 0); 8377 } 8378 8379 static int sdebug_init_cmd_priv(struct Scsi_Host *shost, struct scsi_cmnd *cmd) 8380 { 8381 struct sdebug_scsi_cmd *sdsc = scsi_cmd_priv(cmd); 8382 8383 spin_lock_init(&sdsc->lock); 8384 8385 return 0; 8386 } 8387 8388 static struct scsi_host_template sdebug_driver_template = { 8389 .show_info = scsi_debug_show_info, 8390 .write_info = scsi_debug_write_info, 8391 .proc_name = sdebug_proc_name, 8392 .name = "SCSI DEBUG", 8393 .info = scsi_debug_info, 8394 .slave_alloc = scsi_debug_slave_alloc, 8395 .slave_configure = scsi_debug_slave_configure, 8396 .slave_destroy = scsi_debug_slave_destroy, 8397 .ioctl = scsi_debug_ioctl, 8398 .queuecommand = scsi_debug_queuecommand, 8399 .change_queue_depth = sdebug_change_qdepth, 8400 .map_queues = sdebug_map_queues, 8401 .mq_poll = sdebug_blk_mq_poll, 8402 .eh_abort_handler = scsi_debug_abort, 8403 .eh_device_reset_handler = scsi_debug_device_reset, 8404 .eh_target_reset_handler = scsi_debug_target_reset, 8405 .eh_bus_reset_handler = scsi_debug_bus_reset, 8406 .eh_host_reset_handler = scsi_debug_host_reset, 8407 .can_queue = SDEBUG_CANQUEUE, 8408 .this_id = 7, 8409 .sg_tablesize = SG_MAX_SEGMENTS, 8410 .cmd_per_lun = DEF_CMD_PER_LUN, 8411 .max_sectors = -1U, 8412 .max_segment_size = -1U, 8413 .module = THIS_MODULE, 8414 .track_queue_depth = 1, 8415 .cmd_size = sizeof(struct sdebug_scsi_cmd), 8416 .init_cmd_priv = sdebug_init_cmd_priv, 8417 .target_alloc = sdebug_target_alloc, 8418 .target_destroy = sdebug_target_destroy, 8419 }; 8420 8421 static int sdebug_driver_probe(struct device *dev) 8422 { 8423 int error = 0; 8424 struct sdebug_host_info *sdbg_host; 8425 struct Scsi_Host *hpnt; 8426 int hprot; 8427 8428 sdbg_host = dev_to_sdebug_host(dev); 8429 8430 sdebug_driver_template.can_queue = sdebug_max_queue; 8431 sdebug_driver_template.cmd_per_lun = sdebug_max_queue; 8432 if (!sdebug_clustering) 8433 sdebug_driver_template.dma_boundary = PAGE_SIZE - 1; 8434 8435 hpnt = scsi_host_alloc(&sdebug_driver_template, 0); 8436 if (NULL == hpnt) { 8437 pr_err("scsi_host_alloc failed\n"); 8438 error = -ENODEV; 8439 return error; 8440 } 8441 if (submit_queues > nr_cpu_ids) { 8442 pr_warn("%s: trim submit_queues (was %d) to nr_cpu_ids=%u\n", 8443 my_name, submit_queues, nr_cpu_ids); 8444 submit_queues = nr_cpu_ids; 8445 } 8446 /* 8447 * Decide whether to tell scsi subsystem that we want mq. The 8448 * following should give the same answer for each host. 8449 */ 8450 hpnt->nr_hw_queues = submit_queues; 8451 if (sdebug_host_max_queue) 8452 hpnt->host_tagset = 1; 8453 8454 /* poll queues are possible for nr_hw_queues > 1 */ 8455 if (hpnt->nr_hw_queues == 1 || (poll_queues < 1)) { 8456 pr_warn("%s: trim poll_queues to 0. poll_q/nr_hw = (%d/%d)\n", 8457 my_name, poll_queues, hpnt->nr_hw_queues); 8458 poll_queues = 0; 8459 } 8460 8461 /* 8462 * Poll queues don't need interrupts, but we need at least one I/O queue 8463 * left over for non-polled I/O. 8464 * If condition not met, trim poll_queues to 1 (just for simplicity). 8465 */ 8466 if (poll_queues >= submit_queues) { 8467 if (submit_queues < 3) 8468 pr_warn("%s: trim poll_queues to 1\n", my_name); 8469 else 8470 pr_warn("%s: trim poll_queues to 1. Perhaps try poll_queues=%d\n", 8471 my_name, submit_queues - 1); 8472 poll_queues = 1; 8473 } 8474 if (poll_queues) 8475 hpnt->nr_maps = 3; 8476 8477 sdbg_host->shost = hpnt; 8478 if ((hpnt->this_id >= 0) && (sdebug_num_tgts > hpnt->this_id)) 8479 hpnt->max_id = sdebug_num_tgts + 1; 8480 else 8481 hpnt->max_id = sdebug_num_tgts; 8482 /* = sdebug_max_luns; */ 8483 hpnt->max_lun = SCSI_W_LUN_REPORT_LUNS + 1; 8484 8485 hprot = 0; 8486 8487 switch (sdebug_dif) { 8488 8489 case T10_PI_TYPE1_PROTECTION: 8490 hprot = SHOST_DIF_TYPE1_PROTECTION; 8491 if (sdebug_dix) 8492 hprot |= SHOST_DIX_TYPE1_PROTECTION; 8493 break; 8494 8495 case T10_PI_TYPE2_PROTECTION: 8496 hprot = SHOST_DIF_TYPE2_PROTECTION; 8497 if (sdebug_dix) 8498 hprot |= SHOST_DIX_TYPE2_PROTECTION; 8499 break; 8500 8501 case T10_PI_TYPE3_PROTECTION: 8502 hprot = SHOST_DIF_TYPE3_PROTECTION; 8503 if (sdebug_dix) 8504 hprot |= SHOST_DIX_TYPE3_PROTECTION; 8505 break; 8506 8507 default: 8508 if (sdebug_dix) 8509 hprot |= SHOST_DIX_TYPE0_PROTECTION; 8510 break; 8511 } 8512 8513 scsi_host_set_prot(hpnt, hprot); 8514 8515 if (have_dif_prot || sdebug_dix) 8516 pr_info("host protection%s%s%s%s%s%s%s\n", 8517 (hprot & SHOST_DIF_TYPE1_PROTECTION) ? " DIF1" : "", 8518 (hprot & SHOST_DIF_TYPE2_PROTECTION) ? " DIF2" : "", 8519 (hprot & SHOST_DIF_TYPE3_PROTECTION) ? " DIF3" : "", 8520 (hprot & SHOST_DIX_TYPE0_PROTECTION) ? " DIX0" : "", 8521 (hprot & SHOST_DIX_TYPE1_PROTECTION) ? " DIX1" : "", 8522 (hprot & SHOST_DIX_TYPE2_PROTECTION) ? " DIX2" : "", 8523 (hprot & SHOST_DIX_TYPE3_PROTECTION) ? " DIX3" : ""); 8524 8525 if (sdebug_guard == 1) 8526 scsi_host_set_guard(hpnt, SHOST_DIX_GUARD_IP); 8527 else 8528 scsi_host_set_guard(hpnt, SHOST_DIX_GUARD_CRC); 8529 8530 sdebug_verbose = !!(SDEBUG_OPT_NOISE & sdebug_opts); 8531 sdebug_any_injecting_opt = !!(SDEBUG_OPT_ALL_INJECTING & sdebug_opts); 8532 if (sdebug_every_nth) /* need stats counters for every_nth */ 8533 sdebug_statistics = true; 8534 error = scsi_add_host(hpnt, &sdbg_host->dev); 8535 if (error) { 8536 pr_err("scsi_add_host failed\n"); 8537 error = -ENODEV; 8538 scsi_host_put(hpnt); 8539 } else { 8540 scsi_scan_host(hpnt); 8541 } 8542 8543 return error; 8544 } 8545 8546 static void sdebug_driver_remove(struct device *dev) 8547 { 8548 struct sdebug_host_info *sdbg_host; 8549 struct sdebug_dev_info *sdbg_devinfo, *tmp; 8550 8551 sdbg_host = dev_to_sdebug_host(dev); 8552 8553 scsi_remove_host(sdbg_host->shost); 8554 8555 list_for_each_entry_safe(sdbg_devinfo, tmp, &sdbg_host->dev_info_list, 8556 dev_list) { 8557 list_del(&sdbg_devinfo->dev_list); 8558 kfree(sdbg_devinfo->zstate); 8559 kfree(sdbg_devinfo); 8560 } 8561 8562 scsi_host_put(sdbg_host->shost); 8563 } 8564 8565 static const struct bus_type pseudo_lld_bus = { 8566 .name = "pseudo", 8567 .probe = sdebug_driver_probe, 8568 .remove = sdebug_driver_remove, 8569 .drv_groups = sdebug_drv_groups, 8570 }; 8571