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