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 45 #include <net/checksum.h> 46 47 #include <asm/unaligned.h> 48 49 #include <scsi/scsi.h> 50 #include <scsi/scsi_cmnd.h> 51 #include <scsi/scsi_device.h> 52 #include <scsi/scsi_host.h> 53 #include <scsi/scsicam.h> 54 #include <scsi/scsi_eh.h> 55 #include <scsi/scsi_tcq.h> 56 #include <scsi/scsi_dbg.h> 57 58 #include "sd.h" 59 #include "scsi_logging.h" 60 61 /* make sure inq_product_rev string corresponds to this version */ 62 #define SDEBUG_VERSION "0191" /* format to fit INQUIRY revision field */ 63 static const char *sdebug_version_date = "20210520"; 64 65 #define MY_NAME "scsi_debug" 66 67 /* Additional Sense Code (ASC) */ 68 #define NO_ADDITIONAL_SENSE 0x0 69 #define LOGICAL_UNIT_NOT_READY 0x4 70 #define LOGICAL_UNIT_COMMUNICATION_FAILURE 0x8 71 #define UNRECOVERED_READ_ERR 0x11 72 #define PARAMETER_LIST_LENGTH_ERR 0x1a 73 #define INVALID_OPCODE 0x20 74 #define LBA_OUT_OF_RANGE 0x21 75 #define INVALID_FIELD_IN_CDB 0x24 76 #define INVALID_FIELD_IN_PARAM_LIST 0x26 77 #define WRITE_PROTECTED 0x27 78 #define UA_RESET_ASC 0x29 79 #define UA_CHANGED_ASC 0x2a 80 #define TARGET_CHANGED_ASC 0x3f 81 #define LUNS_CHANGED_ASCQ 0x0e 82 #define INSUFF_RES_ASC 0x55 83 #define INSUFF_RES_ASCQ 0x3 84 #define POWER_ON_RESET_ASCQ 0x0 85 #define POWER_ON_OCCURRED_ASCQ 0x1 86 #define BUS_RESET_ASCQ 0x2 /* scsi bus reset occurred */ 87 #define MODE_CHANGED_ASCQ 0x1 /* mode parameters changed */ 88 #define CAPACITY_CHANGED_ASCQ 0x9 89 #define SAVING_PARAMS_UNSUP 0x39 90 #define TRANSPORT_PROBLEM 0x4b 91 #define THRESHOLD_EXCEEDED 0x5d 92 #define LOW_POWER_COND_ON 0x5e 93 #define MISCOMPARE_VERIFY_ASC 0x1d 94 #define MICROCODE_CHANGED_ASCQ 0x1 /* with TARGET_CHANGED_ASC */ 95 #define MICROCODE_CHANGED_WO_RESET_ASCQ 0x16 96 #define WRITE_ERROR_ASC 0xc 97 #define UNALIGNED_WRITE_ASCQ 0x4 98 #define WRITE_BOUNDARY_ASCQ 0x5 99 #define READ_INVDATA_ASCQ 0x6 100 #define READ_BOUNDARY_ASCQ 0x7 101 #define ATTEMPT_ACCESS_GAP 0x9 102 #define INSUFF_ZONE_ASCQ 0xe 103 104 /* Additional Sense Code Qualifier (ASCQ) */ 105 #define ACK_NAK_TO 0x3 106 107 /* Default values for driver parameters */ 108 #define DEF_NUM_HOST 1 109 #define DEF_NUM_TGTS 1 110 #define DEF_MAX_LUNS 1 111 /* With these defaults, this driver will make 1 host with 1 target 112 * (id 0) containing 1 logical unit (lun 0). That is 1 device. 113 */ 114 #define DEF_ATO 1 115 #define DEF_CDB_LEN 10 116 #define DEF_JDELAY 1 /* if > 0 unit is a jiffy */ 117 #define DEF_DEV_SIZE_PRE_INIT 0 118 #define DEF_DEV_SIZE_MB 8 119 #define DEF_ZBC_DEV_SIZE_MB 128 120 #define DEF_DIF 0 121 #define DEF_DIX 0 122 #define DEF_PER_HOST_STORE false 123 #define DEF_D_SENSE 0 124 #define DEF_EVERY_NTH 0 125 #define DEF_FAKE_RW 0 126 #define DEF_GUARD 0 127 #define DEF_HOST_LOCK 0 128 #define DEF_LBPU 0 129 #define DEF_LBPWS 0 130 #define DEF_LBPWS10 0 131 #define DEF_LBPRZ 1 132 #define DEF_LOWEST_ALIGNED 0 133 #define DEF_NDELAY 0 /* if > 0 unit is a nanosecond */ 134 #define DEF_NO_LUN_0 0 135 #define DEF_NUM_PARTS 0 136 #define DEF_OPTS 0 137 #define DEF_OPT_BLKS 1024 138 #define DEF_PHYSBLK_EXP 0 139 #define DEF_OPT_XFERLEN_EXP 0 140 #define DEF_PTYPE TYPE_DISK 141 #define DEF_RANDOM false 142 #define DEF_REMOVABLE false 143 #define DEF_SCSI_LEVEL 7 /* INQUIRY, byte2 [6->SPC-4; 7->SPC-5] */ 144 #define DEF_SECTOR_SIZE 512 145 #define DEF_UNMAP_ALIGNMENT 0 146 #define DEF_UNMAP_GRANULARITY 1 147 #define DEF_UNMAP_MAX_BLOCKS 0xFFFFFFFF 148 #define DEF_UNMAP_MAX_DESC 256 149 #define DEF_VIRTUAL_GB 0 150 #define DEF_VPD_USE_HOSTNO 1 151 #define DEF_WRITESAME_LENGTH 0xFFFF 152 #define DEF_STRICT 0 153 #define DEF_STATISTICS false 154 #define DEF_SUBMIT_QUEUES 1 155 #define DEF_TUR_MS_TO_READY 0 156 #define DEF_UUID_CTL 0 157 #define JDELAY_OVERRIDDEN -9999 158 159 /* Default parameters for ZBC drives */ 160 #define DEF_ZBC_ZONE_SIZE_MB 128 161 #define DEF_ZBC_MAX_OPEN_ZONES 8 162 #define DEF_ZBC_NR_CONV_ZONES 1 163 164 #define SDEBUG_LUN_0_VAL 0 165 166 /* bit mask values for sdebug_opts */ 167 #define SDEBUG_OPT_NOISE 1 168 #define SDEBUG_OPT_MEDIUM_ERR 2 169 #define SDEBUG_OPT_TIMEOUT 4 170 #define SDEBUG_OPT_RECOVERED_ERR 8 171 #define SDEBUG_OPT_TRANSPORT_ERR 16 172 #define SDEBUG_OPT_DIF_ERR 32 173 #define SDEBUG_OPT_DIX_ERR 64 174 #define SDEBUG_OPT_MAC_TIMEOUT 128 175 #define SDEBUG_OPT_SHORT_TRANSFER 0x100 176 #define SDEBUG_OPT_Q_NOISE 0x200 177 #define SDEBUG_OPT_ALL_TSF 0x400 /* ignore */ 178 #define SDEBUG_OPT_RARE_TSF 0x800 179 #define SDEBUG_OPT_N_WCE 0x1000 180 #define SDEBUG_OPT_RESET_NOISE 0x2000 181 #define SDEBUG_OPT_NO_CDB_NOISE 0x4000 182 #define SDEBUG_OPT_HOST_BUSY 0x8000 183 #define SDEBUG_OPT_CMD_ABORT 0x10000 184 #define SDEBUG_OPT_ALL_NOISE (SDEBUG_OPT_NOISE | SDEBUG_OPT_Q_NOISE | \ 185 SDEBUG_OPT_RESET_NOISE) 186 #define SDEBUG_OPT_ALL_INJECTING (SDEBUG_OPT_RECOVERED_ERR | \ 187 SDEBUG_OPT_TRANSPORT_ERR | \ 188 SDEBUG_OPT_DIF_ERR | SDEBUG_OPT_DIX_ERR | \ 189 SDEBUG_OPT_SHORT_TRANSFER | \ 190 SDEBUG_OPT_HOST_BUSY | \ 191 SDEBUG_OPT_CMD_ABORT) 192 #define SDEBUG_OPT_RECOV_DIF_DIX (SDEBUG_OPT_RECOVERED_ERR | \ 193 SDEBUG_OPT_DIF_ERR | SDEBUG_OPT_DIX_ERR) 194 195 /* As indicated in SAM-5 and SPC-4 Unit Attentions (UAs) are returned in 196 * priority order. In the subset implemented here lower numbers have higher 197 * priority. The UA numbers should be a sequence starting from 0 with 198 * SDEBUG_NUM_UAS being 1 higher than the highest numbered UA. */ 199 #define SDEBUG_UA_POR 0 /* Power on, reset, or bus device reset */ 200 #define SDEBUG_UA_POOCCUR 1 /* Power on occurred */ 201 #define SDEBUG_UA_BUS_RESET 2 202 #define SDEBUG_UA_MODE_CHANGED 3 203 #define SDEBUG_UA_CAPACITY_CHANGED 4 204 #define SDEBUG_UA_LUNS_CHANGED 5 205 #define SDEBUG_UA_MICROCODE_CHANGED 6 /* simulate firmware change */ 206 #define SDEBUG_UA_MICROCODE_CHANGED_WO_RESET 7 207 #define SDEBUG_NUM_UAS 8 208 209 /* when 1==SDEBUG_OPT_MEDIUM_ERR, a medium error is simulated at this 210 * sector on read commands: */ 211 #define OPT_MEDIUM_ERR_ADDR 0x1234 /* that's sector 4660 in decimal */ 212 #define OPT_MEDIUM_ERR_NUM 10 /* number of consecutive medium errs */ 213 214 /* SDEBUG_CANQUEUE is the maximum number of commands that can be queued 215 * (for response) per submit queue at one time. Can be reduced by max_queue 216 * option. Command responses are not queued when jdelay=0 and ndelay=0. The 217 * per-device DEF_CMD_PER_LUN can be changed via sysfs: 218 * /sys/class/scsi_device/<h:c:t:l>/device/queue_depth 219 * but cannot exceed SDEBUG_CANQUEUE . 220 */ 221 #define SDEBUG_CANQUEUE_WORDS 3 /* a WORD is bits in a long */ 222 #define SDEBUG_CANQUEUE (SDEBUG_CANQUEUE_WORDS * BITS_PER_LONG) 223 #define DEF_CMD_PER_LUN SDEBUG_CANQUEUE 224 225 /* UA - Unit Attention; SA - Service Action; SSU - Start Stop Unit */ 226 #define F_D_IN 1 /* Data-in command (e.g. READ) */ 227 #define F_D_OUT 2 /* Data-out command (e.g. WRITE) */ 228 #define F_D_OUT_MAYBE 4 /* WRITE SAME, NDOB bit */ 229 #define F_D_UNKN 8 230 #define F_RL_WLUN_OK 0x10 /* allowed with REPORT LUNS W-LUN */ 231 #define F_SKIP_UA 0x20 /* bypass UAs (e.g. INQUIRY command) */ 232 #define F_DELAY_OVERR 0x40 /* for commands like INQUIRY */ 233 #define F_SA_LOW 0x80 /* SA is in cdb byte 1, bits 4 to 0 */ 234 #define F_SA_HIGH 0x100 /* SA is in cdb bytes 8 and 9 */ 235 #define F_INV_OP 0x200 /* invalid opcode (not supported) */ 236 #define F_FAKE_RW 0x400 /* bypass resp_*() when fake_rw set */ 237 #define F_M_ACCESS 0x800 /* media access, reacts to SSU state */ 238 #define F_SSU_DELAY 0x1000 /* SSU command delay (long-ish) */ 239 #define F_SYNC_DELAY 0x2000 /* SYNCHRONIZE CACHE delay */ 240 241 /* Useful combinations of the above flags */ 242 #define FF_RESPOND (F_RL_WLUN_OK | F_SKIP_UA | F_DELAY_OVERR) 243 #define FF_MEDIA_IO (F_M_ACCESS | F_FAKE_RW) 244 #define FF_SA (F_SA_HIGH | F_SA_LOW) 245 #define F_LONG_DELAY (F_SSU_DELAY | F_SYNC_DELAY) 246 247 #define SDEBUG_MAX_PARTS 4 248 249 #define SDEBUG_MAX_CMD_LEN 32 250 251 #define SDEB_XA_NOT_IN_USE XA_MARK_1 252 253 /* Zone types (zbcr05 table 25) */ 254 enum sdebug_z_type { 255 ZBC_ZTYPE_CNV = 0x1, 256 ZBC_ZTYPE_SWR = 0x2, 257 ZBC_ZTYPE_SWP = 0x3, 258 /* ZBC_ZTYPE_SOBR = 0x4, */ 259 ZBC_ZTYPE_GAP = 0x5, 260 }; 261 262 /* enumeration names taken from table 26, zbcr05 */ 263 enum sdebug_z_cond { 264 ZBC_NOT_WRITE_POINTER = 0x0, 265 ZC1_EMPTY = 0x1, 266 ZC2_IMPLICIT_OPEN = 0x2, 267 ZC3_EXPLICIT_OPEN = 0x3, 268 ZC4_CLOSED = 0x4, 269 ZC6_READ_ONLY = 0xd, 270 ZC5_FULL = 0xe, 271 ZC7_OFFLINE = 0xf, 272 }; 273 274 struct sdeb_zone_state { /* ZBC: per zone state */ 275 enum sdebug_z_type z_type; 276 enum sdebug_z_cond z_cond; 277 bool z_non_seq_resource; 278 unsigned int z_size; 279 sector_t z_start; 280 sector_t z_wp; 281 }; 282 283 struct sdebug_dev_info { 284 struct list_head dev_list; 285 unsigned int channel; 286 unsigned int target; 287 u64 lun; 288 uuid_t lu_name; 289 struct sdebug_host_info *sdbg_host; 290 unsigned long uas_bm[1]; 291 atomic_t num_in_q; 292 atomic_t stopped; /* 1: by SSU, 2: device start */ 293 bool used; 294 295 /* For ZBC devices */ 296 enum blk_zoned_model zmodel; 297 unsigned int zcap; 298 unsigned int zsize; 299 unsigned int zsize_shift; 300 unsigned int nr_zones; 301 unsigned int nr_conv_zones; 302 unsigned int nr_seq_zones; 303 unsigned int nr_imp_open; 304 unsigned int nr_exp_open; 305 unsigned int nr_closed; 306 unsigned int max_open; 307 ktime_t create_ts; /* time since bootup that this device was created */ 308 struct sdeb_zone_state *zstate; 309 }; 310 311 struct sdebug_host_info { 312 struct list_head host_list; 313 int si_idx; /* sdeb_store_info (per host) xarray index */ 314 struct Scsi_Host *shost; 315 struct device dev; 316 struct list_head dev_info_list; 317 }; 318 319 /* There is an xarray of pointers to this struct's objects, one per host */ 320 struct sdeb_store_info { 321 rwlock_t macc_lck; /* for atomic media access on this store */ 322 u8 *storep; /* user data storage (ram) */ 323 struct t10_pi_tuple *dif_storep; /* protection info */ 324 void *map_storep; /* provisioning map */ 325 }; 326 327 #define to_sdebug_host(d) \ 328 container_of(d, struct sdebug_host_info, dev) 329 330 enum sdeb_defer_type {SDEB_DEFER_NONE = 0, SDEB_DEFER_HRT = 1, 331 SDEB_DEFER_WQ = 2, SDEB_DEFER_POLL = 3}; 332 333 struct sdebug_defer { 334 struct hrtimer hrt; 335 struct execute_work ew; 336 ktime_t cmpl_ts;/* time since boot to complete this cmd */ 337 int sqa_idx; /* index of sdebug_queue array */ 338 int qc_idx; /* index of sdebug_queued_cmd array within sqa_idx */ 339 int hc_idx; /* hostwide tag index */ 340 int issuing_cpu; 341 bool init_hrt; 342 bool init_wq; 343 bool init_poll; 344 bool aborted; /* true when blk_abort_request() already called */ 345 enum sdeb_defer_type defer_t; 346 }; 347 348 struct sdebug_queued_cmd { 349 /* corresponding bit set in in_use_bm[] in owning struct sdebug_queue 350 * instance indicates this slot is in use. 351 */ 352 struct sdebug_defer *sd_dp; 353 struct scsi_cmnd *a_cmnd; 354 }; 355 356 struct sdebug_queue { 357 struct sdebug_queued_cmd qc_arr[SDEBUG_CANQUEUE]; 358 unsigned long in_use_bm[SDEBUG_CANQUEUE_WORDS]; 359 spinlock_t qc_lock; 360 atomic_t blocked; /* to temporarily stop more being queued */ 361 }; 362 363 static atomic_t sdebug_cmnd_count; /* number of incoming commands */ 364 static atomic_t sdebug_completions; /* count of deferred completions */ 365 static atomic_t sdebug_miss_cpus; /* submission + completion cpus differ */ 366 static atomic_t sdebug_a_tsf; /* 'almost task set full' counter */ 367 static atomic_t sdeb_inject_pending; 368 static atomic_t sdeb_mq_poll_count; /* bumped when mq_poll returns > 0 */ 369 370 struct opcode_info_t { 371 u8 num_attached; /* 0 if this is it (i.e. a leaf); use 0xff */ 372 /* for terminating element */ 373 u8 opcode; /* if num_attached > 0, preferred */ 374 u16 sa; /* service action */ 375 u32 flags; /* OR-ed set of SDEB_F_* */ 376 int (*pfp)(struct scsi_cmnd *, struct sdebug_dev_info *); 377 const struct opcode_info_t *arrp; /* num_attached elements or NULL */ 378 u8 len_mask[16]; /* len_mask[0]-->cdb_len, then mask for cdb */ 379 /* 1 to min(cdb_len, 15); ignore cdb[15...] */ 380 }; 381 382 /* SCSI opcodes (first byte of cdb) of interest mapped onto these indexes */ 383 enum sdeb_opcode_index { 384 SDEB_I_INVALID_OPCODE = 0, 385 SDEB_I_INQUIRY = 1, 386 SDEB_I_REPORT_LUNS = 2, 387 SDEB_I_REQUEST_SENSE = 3, 388 SDEB_I_TEST_UNIT_READY = 4, 389 SDEB_I_MODE_SENSE = 5, /* 6, 10 */ 390 SDEB_I_MODE_SELECT = 6, /* 6, 10 */ 391 SDEB_I_LOG_SENSE = 7, 392 SDEB_I_READ_CAPACITY = 8, /* 10; 16 is in SA_IN(16) */ 393 SDEB_I_READ = 9, /* 6, 10, 12, 16 */ 394 SDEB_I_WRITE = 10, /* 6, 10, 12, 16 */ 395 SDEB_I_START_STOP = 11, 396 SDEB_I_SERV_ACT_IN_16 = 12, /* add ...SERV_ACT_IN_12 if needed */ 397 SDEB_I_SERV_ACT_OUT_16 = 13, /* add ...SERV_ACT_OUT_12 if needed */ 398 SDEB_I_MAINT_IN = 14, 399 SDEB_I_MAINT_OUT = 15, 400 SDEB_I_VERIFY = 16, /* VERIFY(10), VERIFY(16) */ 401 SDEB_I_VARIABLE_LEN = 17, /* READ(32), WRITE(32), WR_SCAT(32) */ 402 SDEB_I_RESERVE = 18, /* 6, 10 */ 403 SDEB_I_RELEASE = 19, /* 6, 10 */ 404 SDEB_I_ALLOW_REMOVAL = 20, /* PREVENT ALLOW MEDIUM REMOVAL */ 405 SDEB_I_REZERO_UNIT = 21, /* REWIND in SSC */ 406 SDEB_I_ATA_PT = 22, /* 12, 16 */ 407 SDEB_I_SEND_DIAG = 23, 408 SDEB_I_UNMAP = 24, 409 SDEB_I_WRITE_BUFFER = 25, 410 SDEB_I_WRITE_SAME = 26, /* 10, 16 */ 411 SDEB_I_SYNC_CACHE = 27, /* 10, 16 */ 412 SDEB_I_COMP_WRITE = 28, 413 SDEB_I_PRE_FETCH = 29, /* 10, 16 */ 414 SDEB_I_ZONE_OUT = 30, /* 0x94+SA; includes no data xfer */ 415 SDEB_I_ZONE_IN = 31, /* 0x95+SA; all have data-in */ 416 SDEB_I_LAST_ELEM_P1 = 32, /* keep this last (previous + 1) */ 417 }; 418 419 420 static const unsigned char opcode_ind_arr[256] = { 421 /* 0x0; 0x0->0x1f: 6 byte cdbs */ 422 SDEB_I_TEST_UNIT_READY, SDEB_I_REZERO_UNIT, 0, SDEB_I_REQUEST_SENSE, 423 0, 0, 0, 0, 424 SDEB_I_READ, 0, SDEB_I_WRITE, 0, 0, 0, 0, 0, 425 0, 0, SDEB_I_INQUIRY, 0, 0, SDEB_I_MODE_SELECT, SDEB_I_RESERVE, 426 SDEB_I_RELEASE, 427 0, 0, SDEB_I_MODE_SENSE, SDEB_I_START_STOP, 0, SDEB_I_SEND_DIAG, 428 SDEB_I_ALLOW_REMOVAL, 0, 429 /* 0x20; 0x20->0x3f: 10 byte cdbs */ 430 0, 0, 0, 0, 0, SDEB_I_READ_CAPACITY, 0, 0, 431 SDEB_I_READ, 0, SDEB_I_WRITE, 0, 0, 0, 0, SDEB_I_VERIFY, 432 0, 0, 0, 0, SDEB_I_PRE_FETCH, SDEB_I_SYNC_CACHE, 0, 0, 433 0, 0, 0, SDEB_I_WRITE_BUFFER, 0, 0, 0, 0, 434 /* 0x40; 0x40->0x5f: 10 byte cdbs */ 435 0, SDEB_I_WRITE_SAME, SDEB_I_UNMAP, 0, 0, 0, 0, 0, 436 0, 0, 0, 0, 0, SDEB_I_LOG_SENSE, 0, 0, 437 0, 0, 0, 0, 0, SDEB_I_MODE_SELECT, SDEB_I_RESERVE, 438 SDEB_I_RELEASE, 439 0, 0, SDEB_I_MODE_SENSE, 0, 0, 0, 0, 0, 440 /* 0x60; 0x60->0x7d are reserved, 0x7e is "extended cdb" */ 441 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 442 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 443 0, SDEB_I_VARIABLE_LEN, 444 /* 0x80; 0x80->0x9f: 16 byte cdbs */ 445 0, 0, 0, 0, 0, SDEB_I_ATA_PT, 0, 0, 446 SDEB_I_READ, SDEB_I_COMP_WRITE, SDEB_I_WRITE, 0, 447 0, 0, 0, SDEB_I_VERIFY, 448 SDEB_I_PRE_FETCH, SDEB_I_SYNC_CACHE, 0, SDEB_I_WRITE_SAME, 449 SDEB_I_ZONE_OUT, SDEB_I_ZONE_IN, 0, 0, 450 0, 0, 0, 0, 0, 0, SDEB_I_SERV_ACT_IN_16, SDEB_I_SERV_ACT_OUT_16, 451 /* 0xa0; 0xa0->0xbf: 12 byte cdbs */ 452 SDEB_I_REPORT_LUNS, SDEB_I_ATA_PT, 0, SDEB_I_MAINT_IN, 453 SDEB_I_MAINT_OUT, 0, 0, 0, 454 SDEB_I_READ, 0 /* SDEB_I_SERV_ACT_OUT_12 */, SDEB_I_WRITE, 455 0 /* SDEB_I_SERV_ACT_IN_12 */, 0, 0, 0, 0, 456 0, 0, 0, 0, 0, 0, 0, 0, 457 0, 0, 0, 0, 0, 0, 0, 0, 458 /* 0xc0; 0xc0->0xff: vendor specific */ 459 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 460 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 461 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 462 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 463 }; 464 465 /* 466 * The following "response" functions return the SCSI mid-level's 4 byte 467 * tuple-in-an-int. To handle commands with an IMMED bit, for a faster 468 * command completion, they can mask their return value with 469 * SDEG_RES_IMMED_MASK . 470 */ 471 #define SDEG_RES_IMMED_MASK 0x40000000 472 473 static int resp_inquiry(struct scsi_cmnd *, struct sdebug_dev_info *); 474 static int resp_report_luns(struct scsi_cmnd *, struct sdebug_dev_info *); 475 static int resp_requests(struct scsi_cmnd *, struct sdebug_dev_info *); 476 static int resp_mode_sense(struct scsi_cmnd *, struct sdebug_dev_info *); 477 static int resp_mode_select(struct scsi_cmnd *, struct sdebug_dev_info *); 478 static int resp_log_sense(struct scsi_cmnd *, struct sdebug_dev_info *); 479 static int resp_readcap(struct scsi_cmnd *, struct sdebug_dev_info *); 480 static int resp_read_dt0(struct scsi_cmnd *, struct sdebug_dev_info *); 481 static int resp_write_dt0(struct scsi_cmnd *, struct sdebug_dev_info *); 482 static int resp_write_scat(struct scsi_cmnd *, struct sdebug_dev_info *); 483 static int resp_start_stop(struct scsi_cmnd *, struct sdebug_dev_info *); 484 static int resp_readcap16(struct scsi_cmnd *, struct sdebug_dev_info *); 485 static int resp_get_lba_status(struct scsi_cmnd *, struct sdebug_dev_info *); 486 static int resp_report_tgtpgs(struct scsi_cmnd *, struct sdebug_dev_info *); 487 static int resp_unmap(struct scsi_cmnd *, struct sdebug_dev_info *); 488 static int resp_rsup_opcodes(struct scsi_cmnd *, struct sdebug_dev_info *); 489 static int resp_rsup_tmfs(struct scsi_cmnd *, struct sdebug_dev_info *); 490 static int resp_verify(struct scsi_cmnd *, struct sdebug_dev_info *); 491 static int resp_write_same_10(struct scsi_cmnd *, struct sdebug_dev_info *); 492 static int resp_write_same_16(struct scsi_cmnd *, struct sdebug_dev_info *); 493 static int resp_comp_write(struct scsi_cmnd *, struct sdebug_dev_info *); 494 static int resp_write_buffer(struct scsi_cmnd *, struct sdebug_dev_info *); 495 static int resp_sync_cache(struct scsi_cmnd *, struct sdebug_dev_info *); 496 static int resp_pre_fetch(struct scsi_cmnd *, struct sdebug_dev_info *); 497 static int resp_report_zones(struct scsi_cmnd *, struct sdebug_dev_info *); 498 static int resp_open_zone(struct scsi_cmnd *, struct sdebug_dev_info *); 499 static int resp_close_zone(struct scsi_cmnd *, struct sdebug_dev_info *); 500 static int resp_finish_zone(struct scsi_cmnd *, struct sdebug_dev_info *); 501 static int resp_rwp_zone(struct scsi_cmnd *, struct sdebug_dev_info *); 502 503 static int sdebug_do_add_host(bool mk_new_store); 504 static int sdebug_add_host_helper(int per_host_idx); 505 static void sdebug_do_remove_host(bool the_end); 506 static int sdebug_add_store(void); 507 static void sdebug_erase_store(int idx, struct sdeb_store_info *sip); 508 static void sdebug_erase_all_stores(bool apart_from_first); 509 510 /* 511 * The following are overflow arrays for cdbs that "hit" the same index in 512 * the opcode_info_arr array. The most time sensitive (or commonly used) cdb 513 * should be placed in opcode_info_arr[], the others should be placed here. 514 */ 515 static const struct opcode_info_t msense_iarr[] = { 516 {0, 0x1a, 0, F_D_IN, NULL, NULL, 517 {6, 0xe8, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} }, 518 }; 519 520 static const struct opcode_info_t mselect_iarr[] = { 521 {0, 0x15, 0, F_D_OUT, NULL, NULL, 522 {6, 0xf1, 0, 0, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} }, 523 }; 524 525 static const struct opcode_info_t read_iarr[] = { 526 {0, 0x28, 0, F_D_IN | FF_MEDIA_IO, resp_read_dt0, NULL,/* READ(10) */ 527 {10, 0xff, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xff, 0xff, 0xc7, 0, 0, 528 0, 0, 0, 0} }, 529 {0, 0x8, 0, F_D_IN | FF_MEDIA_IO, resp_read_dt0, NULL, /* READ(6) */ 530 {6, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} }, 531 {0, 0xa8, 0, F_D_IN | FF_MEDIA_IO, resp_read_dt0, NULL,/* READ(12) */ 532 {12, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xbf, 533 0xc7, 0, 0, 0, 0} }, 534 }; 535 536 static const struct opcode_info_t write_iarr[] = { 537 {0, 0x2a, 0, F_D_OUT | FF_MEDIA_IO, resp_write_dt0, /* WRITE(10) */ 538 NULL, {10, 0xfb, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xff, 0xff, 0xc7, 539 0, 0, 0, 0, 0, 0} }, 540 {0, 0xa, 0, F_D_OUT | FF_MEDIA_IO, resp_write_dt0, /* WRITE(6) */ 541 NULL, {6, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 542 0, 0, 0} }, 543 {0, 0xaa, 0, F_D_OUT | FF_MEDIA_IO, resp_write_dt0, /* WRITE(12) */ 544 NULL, {12, 0xfb, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 545 0xbf, 0xc7, 0, 0, 0, 0} }, 546 }; 547 548 static const struct opcode_info_t verify_iarr[] = { 549 {0, 0x2f, 0, F_D_OUT_MAYBE | FF_MEDIA_IO, resp_verify,/* VERIFY(10) */ 550 NULL, {10, 0xf7, 0xff, 0xff, 0xff, 0xff, 0xbf, 0xff, 0xff, 0xc7, 551 0, 0, 0, 0, 0, 0} }, 552 }; 553 554 static const struct opcode_info_t sa_in_16_iarr[] = { 555 {0, 0x9e, 0x12, F_SA_LOW | F_D_IN, resp_get_lba_status, NULL, 556 {16, 0x12, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 557 0xff, 0xff, 0xff, 0, 0xc7} }, /* GET LBA STATUS(16) */ 558 }; 559 560 static const struct opcode_info_t vl_iarr[] = { /* VARIABLE LENGTH */ 561 {0, 0x7f, 0xb, F_SA_HIGH | F_D_OUT | FF_MEDIA_IO, resp_write_dt0, 562 NULL, {32, 0xc7, 0, 0, 0, 0, 0x3f, 0x18, 0x0, 0xb, 0xfa, 563 0, 0xff, 0xff, 0xff, 0xff} }, /* WRITE(32) */ 564 {0, 0x7f, 0x11, F_SA_HIGH | F_D_OUT | FF_MEDIA_IO, resp_write_scat, 565 NULL, {32, 0xc7, 0, 0, 0, 0, 0x3f, 0x18, 0x0, 0x11, 0xf8, 566 0, 0xff, 0xff, 0x0, 0x0} }, /* WRITE SCATTERED(32) */ 567 }; 568 569 static const struct opcode_info_t maint_in_iarr[] = { /* MAINT IN */ 570 {0, 0xa3, 0xc, F_SA_LOW | F_D_IN, resp_rsup_opcodes, NULL, 571 {12, 0xc, 0x87, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0, 572 0xc7, 0, 0, 0, 0} }, /* REPORT SUPPORTED OPERATION CODES */ 573 {0, 0xa3, 0xd, F_SA_LOW | F_D_IN, resp_rsup_tmfs, NULL, 574 {12, 0xd, 0x80, 0, 0, 0, 0xff, 0xff, 0xff, 0xff, 0, 0xc7, 0, 0, 575 0, 0} }, /* REPORTED SUPPORTED TASK MANAGEMENT FUNCTIONS */ 576 }; 577 578 static const struct opcode_info_t write_same_iarr[] = { 579 {0, 0x93, 0, F_D_OUT_MAYBE | FF_MEDIA_IO, resp_write_same_16, NULL, 580 {16, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 581 0xff, 0xff, 0xff, 0x3f, 0xc7} }, /* WRITE SAME(16) */ 582 }; 583 584 static const struct opcode_info_t reserve_iarr[] = { 585 {0, 0x16, 0, F_D_OUT, NULL, NULL, /* RESERVE(6) */ 586 {6, 0x1f, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} }, 587 }; 588 589 static const struct opcode_info_t release_iarr[] = { 590 {0, 0x17, 0, F_D_OUT, NULL, NULL, /* RELEASE(6) */ 591 {6, 0x1f, 0xff, 0, 0, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} }, 592 }; 593 594 static const struct opcode_info_t sync_cache_iarr[] = { 595 {0, 0x91, 0, F_SYNC_DELAY | F_M_ACCESS, resp_sync_cache, NULL, 596 {16, 0x6, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 597 0xff, 0xff, 0xff, 0xff, 0x3f, 0xc7} }, /* SYNC_CACHE (16) */ 598 }; 599 600 static const struct opcode_info_t pre_fetch_iarr[] = { 601 {0, 0x90, 0, F_SYNC_DELAY | FF_MEDIA_IO, resp_pre_fetch, NULL, 602 {16, 0x2, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 603 0xff, 0xff, 0xff, 0xff, 0x3f, 0xc7} }, /* PRE-FETCH (16) */ 604 }; 605 606 static const struct opcode_info_t zone_out_iarr[] = { /* ZONE OUT(16) */ 607 {0, 0x94, 0x1, F_SA_LOW | F_M_ACCESS, resp_close_zone, NULL, 608 {16, 0x1, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 609 0xff, 0, 0, 0xff, 0xff, 0x1, 0xc7} }, /* CLOSE ZONE */ 610 {0, 0x94, 0x2, F_SA_LOW | F_M_ACCESS, resp_finish_zone, NULL, 611 {16, 0x2, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 612 0xff, 0, 0, 0xff, 0xff, 0x1, 0xc7} }, /* FINISH ZONE */ 613 {0, 0x94, 0x4, F_SA_LOW | F_M_ACCESS, resp_rwp_zone, NULL, 614 {16, 0x4, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 615 0xff, 0, 0, 0xff, 0xff, 0x1, 0xc7} }, /* RESET WRITE POINTER */ 616 }; 617 618 static const struct opcode_info_t zone_in_iarr[] = { /* ZONE IN(16) */ 619 {0, 0x95, 0x6, F_SA_LOW | F_D_IN | F_M_ACCESS, NULL, NULL, 620 {16, 0x6, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 621 0xff, 0xff, 0xff, 0xff, 0x3f, 0xc7} }, /* REPORT ZONES */ 622 }; 623 624 625 /* This array is accessed via SDEB_I_* values. Make sure all are mapped, 626 * plus the terminating elements for logic that scans this table such as 627 * REPORT SUPPORTED OPERATION CODES. */ 628 static const struct opcode_info_t opcode_info_arr[SDEB_I_LAST_ELEM_P1 + 1] = { 629 /* 0 */ 630 {0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL, /* unknown opcodes */ 631 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} }, 632 {0, 0x12, 0, FF_RESPOND | F_D_IN, resp_inquiry, NULL, /* INQUIRY */ 633 {6, 0xe3, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} }, 634 {0, 0xa0, 0, FF_RESPOND | F_D_IN, resp_report_luns, NULL, 635 {12, 0xe3, 0xff, 0, 0, 0, 0xff, 0xff, 0xff, 0xff, 0, 0xc7, 0, 0, 636 0, 0} }, /* REPORT LUNS */ 637 {0, 0x3, 0, FF_RESPOND | F_D_IN, resp_requests, NULL, 638 {6, 0xe1, 0, 0, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} }, 639 {0, 0x0, 0, F_M_ACCESS | F_RL_WLUN_OK, NULL, NULL,/* TEST UNIT READY */ 640 {6, 0, 0, 0, 0, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} }, 641 /* 5 */ 642 {ARRAY_SIZE(msense_iarr), 0x5a, 0, F_D_IN, /* MODE SENSE(10) */ 643 resp_mode_sense, msense_iarr, {10, 0xf8, 0xff, 0xff, 0, 0, 0, 644 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0} }, 645 {ARRAY_SIZE(mselect_iarr), 0x55, 0, F_D_OUT, /* MODE SELECT(10) */ 646 resp_mode_select, mselect_iarr, {10, 0xf1, 0, 0, 0, 0, 0, 0xff, 647 0xff, 0xc7, 0, 0, 0, 0, 0, 0} }, 648 {0, 0x4d, 0, F_D_IN, resp_log_sense, NULL, /* LOG SENSE */ 649 {10, 0xe3, 0xff, 0xff, 0, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 650 0, 0, 0} }, 651 {0, 0x25, 0, F_D_IN, resp_readcap, NULL, /* READ CAPACITY(10) */ 652 {10, 0xe1, 0xff, 0xff, 0xff, 0xff, 0, 0, 0x1, 0xc7, 0, 0, 0, 0, 653 0, 0} }, 654 {ARRAY_SIZE(read_iarr), 0x88, 0, F_D_IN | FF_MEDIA_IO, /* READ(16) */ 655 resp_read_dt0, read_iarr, {16, 0xfe, 0xff, 0xff, 0xff, 0xff, 656 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc7} }, 657 /* 10 */ 658 {ARRAY_SIZE(write_iarr), 0x8a, 0, F_D_OUT | FF_MEDIA_IO, 659 resp_write_dt0, write_iarr, /* WRITE(16) */ 660 {16, 0xfa, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 661 0xff, 0xff, 0xff, 0xff, 0xff, 0xc7} }, 662 {0, 0x1b, 0, F_SSU_DELAY, resp_start_stop, NULL,/* START STOP UNIT */ 663 {6, 0x1, 0, 0xf, 0xf7, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} }, 664 {ARRAY_SIZE(sa_in_16_iarr), 0x9e, 0x10, F_SA_LOW | F_D_IN, 665 resp_readcap16, sa_in_16_iarr, /* SA_IN(16), READ CAPACITY(16) */ 666 {16, 0x10, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 667 0xff, 0xff, 0xff, 0xff, 0x1, 0xc7} }, 668 {0, 0x9f, 0x12, F_SA_LOW | F_D_OUT | FF_MEDIA_IO, resp_write_scat, 669 NULL, {16, 0x12, 0xf9, 0x0, 0xff, 0xff, 0, 0, 0xff, 0xff, 0xff, 670 0xff, 0xff, 0xff, 0xff, 0xc7} }, /* SA_OUT(16), WRITE SCAT(16) */ 671 {ARRAY_SIZE(maint_in_iarr), 0xa3, 0xa, F_SA_LOW | F_D_IN, 672 resp_report_tgtpgs, /* MAINT IN, REPORT TARGET PORT GROUPS */ 673 maint_in_iarr, {12, 0xea, 0, 0, 0, 0, 0xff, 0xff, 0xff, 674 0xff, 0, 0xc7, 0, 0, 0, 0} }, 675 /* 15 */ 676 {0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL, /* MAINT OUT */ 677 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} }, 678 {ARRAY_SIZE(verify_iarr), 0x8f, 0, 679 F_D_OUT_MAYBE | FF_MEDIA_IO, resp_verify, /* VERIFY(16) */ 680 verify_iarr, {16, 0xf6, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 681 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xc7} }, 682 {ARRAY_SIZE(vl_iarr), 0x7f, 0x9, F_SA_HIGH | F_D_IN | FF_MEDIA_IO, 683 resp_read_dt0, vl_iarr, /* VARIABLE LENGTH, READ(32) */ 684 {32, 0xc7, 0, 0, 0, 0, 0x3f, 0x18, 0x0, 0x9, 0xfe, 0, 0xff, 0xff, 685 0xff, 0xff} }, 686 {ARRAY_SIZE(reserve_iarr), 0x56, 0, F_D_OUT, 687 NULL, reserve_iarr, /* RESERVE(10) <no response function> */ 688 {10, 0xff, 0xff, 0xff, 0, 0, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 689 0} }, 690 {ARRAY_SIZE(release_iarr), 0x57, 0, F_D_OUT, 691 NULL, release_iarr, /* RELEASE(10) <no response function> */ 692 {10, 0x13, 0xff, 0xff, 0, 0, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 693 0} }, 694 /* 20 */ 695 {0, 0x1e, 0, 0, NULL, NULL, /* ALLOW REMOVAL */ 696 {6, 0, 0, 0, 0x3, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} }, 697 {0, 0x1, 0, 0, resp_start_stop, NULL, /* REWIND ?? */ 698 {6, 0x1, 0, 0, 0, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} }, 699 {0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL, /* ATA_PT */ 700 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} }, 701 {0, 0x1d, F_D_OUT, 0, NULL, NULL, /* SEND DIAGNOSTIC */ 702 {6, 0xf7, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} }, 703 {0, 0x42, 0, F_D_OUT | FF_MEDIA_IO, resp_unmap, NULL, /* UNMAP */ 704 {10, 0x1, 0, 0, 0, 0, 0x3f, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0} }, 705 /* 25 */ 706 {0, 0x3b, 0, F_D_OUT_MAYBE, resp_write_buffer, NULL, 707 {10, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0, 708 0, 0, 0, 0} }, /* WRITE_BUFFER */ 709 {ARRAY_SIZE(write_same_iarr), 0x41, 0, F_D_OUT_MAYBE | FF_MEDIA_IO, 710 resp_write_same_10, write_same_iarr, /* WRITE SAME(10) */ 711 {10, 0xff, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xff, 0xff, 0xc7, 0, 712 0, 0, 0, 0, 0} }, 713 {ARRAY_SIZE(sync_cache_iarr), 0x35, 0, F_SYNC_DELAY | F_M_ACCESS, 714 resp_sync_cache, sync_cache_iarr, 715 {10, 0x7, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xff, 0xff, 0xc7, 0, 0, 716 0, 0, 0, 0} }, /* SYNC_CACHE (10) */ 717 {0, 0x89, 0, F_D_OUT | FF_MEDIA_IO, resp_comp_write, NULL, 718 {16, 0xf8, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0, 0, 719 0, 0xff, 0x3f, 0xc7} }, /* COMPARE AND WRITE */ 720 {ARRAY_SIZE(pre_fetch_iarr), 0x34, 0, F_SYNC_DELAY | FF_MEDIA_IO, 721 resp_pre_fetch, pre_fetch_iarr, 722 {10, 0x2, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xff, 0xff, 0xc7, 0, 0, 723 0, 0, 0, 0} }, /* PRE-FETCH (10) */ 724 725 /* 30 */ 726 {ARRAY_SIZE(zone_out_iarr), 0x94, 0x3, F_SA_LOW | F_M_ACCESS, 727 resp_open_zone, zone_out_iarr, /* ZONE_OUT(16), OPEN ZONE) */ 728 {16, 0x3 /* SA */, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 729 0xff, 0xff, 0x0, 0x0, 0xff, 0xff, 0x1, 0xc7} }, 730 {ARRAY_SIZE(zone_in_iarr), 0x95, 0x0, F_SA_LOW | F_M_ACCESS, 731 resp_report_zones, zone_in_iarr, /* ZONE_IN(16), REPORT ZONES) */ 732 {16, 0x0 /* SA */, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 733 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xbf, 0xc7} }, 734 /* sentinel */ 735 {0xff, 0, 0, 0, NULL, NULL, /* terminating element */ 736 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} }, 737 }; 738 739 static int sdebug_num_hosts; 740 static int sdebug_add_host = DEF_NUM_HOST; /* in sysfs this is relative */ 741 static int sdebug_ato = DEF_ATO; 742 static int sdebug_cdb_len = DEF_CDB_LEN; 743 static int sdebug_jdelay = DEF_JDELAY; /* if > 0 then unit is jiffies */ 744 static int sdebug_dev_size_mb = DEF_DEV_SIZE_PRE_INIT; 745 static int sdebug_dif = DEF_DIF; 746 static int sdebug_dix = DEF_DIX; 747 static int sdebug_dsense = DEF_D_SENSE; 748 static int sdebug_every_nth = DEF_EVERY_NTH; 749 static int sdebug_fake_rw = DEF_FAKE_RW; 750 static unsigned int sdebug_guard = DEF_GUARD; 751 static int sdebug_host_max_queue; /* per host */ 752 static int sdebug_lowest_aligned = DEF_LOWEST_ALIGNED; 753 static int sdebug_max_luns = DEF_MAX_LUNS; 754 static int sdebug_max_queue = SDEBUG_CANQUEUE; /* per submit queue */ 755 static unsigned int sdebug_medium_error_start = OPT_MEDIUM_ERR_ADDR; 756 static int sdebug_medium_error_count = OPT_MEDIUM_ERR_NUM; 757 static atomic_t retired_max_queue; /* if > 0 then was prior max_queue */ 758 static int sdebug_ndelay = DEF_NDELAY; /* if > 0 then unit is nanoseconds */ 759 static int sdebug_no_lun_0 = DEF_NO_LUN_0; 760 static int sdebug_no_uld; 761 static int sdebug_num_parts = DEF_NUM_PARTS; 762 static int sdebug_num_tgts = DEF_NUM_TGTS; /* targets per host */ 763 static int sdebug_opt_blks = DEF_OPT_BLKS; 764 static int sdebug_opts = DEF_OPTS; 765 static int sdebug_physblk_exp = DEF_PHYSBLK_EXP; 766 static int sdebug_opt_xferlen_exp = DEF_OPT_XFERLEN_EXP; 767 static int sdebug_ptype = DEF_PTYPE; /* SCSI peripheral device type */ 768 static int sdebug_scsi_level = DEF_SCSI_LEVEL; 769 static int sdebug_sector_size = DEF_SECTOR_SIZE; 770 static int sdeb_tur_ms_to_ready = DEF_TUR_MS_TO_READY; 771 static int sdebug_virtual_gb = DEF_VIRTUAL_GB; 772 static int sdebug_vpd_use_hostno = DEF_VPD_USE_HOSTNO; 773 static unsigned int sdebug_lbpu = DEF_LBPU; 774 static unsigned int sdebug_lbpws = DEF_LBPWS; 775 static unsigned int sdebug_lbpws10 = DEF_LBPWS10; 776 static unsigned int sdebug_lbprz = DEF_LBPRZ; 777 static unsigned int sdebug_unmap_alignment = DEF_UNMAP_ALIGNMENT; 778 static unsigned int sdebug_unmap_granularity = DEF_UNMAP_GRANULARITY; 779 static unsigned int sdebug_unmap_max_blocks = DEF_UNMAP_MAX_BLOCKS; 780 static unsigned int sdebug_unmap_max_desc = DEF_UNMAP_MAX_DESC; 781 static unsigned int sdebug_write_same_length = DEF_WRITESAME_LENGTH; 782 static int sdebug_uuid_ctl = DEF_UUID_CTL; 783 static bool sdebug_random = DEF_RANDOM; 784 static bool sdebug_per_host_store = DEF_PER_HOST_STORE; 785 static bool sdebug_removable = DEF_REMOVABLE; 786 static bool sdebug_clustering; 787 static bool sdebug_host_lock = DEF_HOST_LOCK; 788 static bool sdebug_strict = DEF_STRICT; 789 static bool sdebug_any_injecting_opt; 790 static bool sdebug_no_rwlock; 791 static bool sdebug_verbose; 792 static bool have_dif_prot; 793 static bool write_since_sync; 794 static bool sdebug_statistics = DEF_STATISTICS; 795 static bool sdebug_wp; 796 /* Following enum: 0: no zbc, def; 1: host aware; 2: host managed */ 797 static enum blk_zoned_model sdeb_zbc_model = BLK_ZONED_NONE; 798 static char *sdeb_zbc_model_s; 799 800 enum sam_lun_addr_method {SAM_LUN_AM_PERIPHERAL = 0x0, 801 SAM_LUN_AM_FLAT = 0x1, 802 SAM_LUN_AM_LOGICAL_UNIT = 0x2, 803 SAM_LUN_AM_EXTENDED = 0x3}; 804 static enum sam_lun_addr_method sdebug_lun_am = SAM_LUN_AM_PERIPHERAL; 805 static int sdebug_lun_am_i = (int)SAM_LUN_AM_PERIPHERAL; 806 807 static unsigned int sdebug_store_sectors; 808 static sector_t sdebug_capacity; /* in sectors */ 809 810 /* old BIOS stuff, kernel may get rid of them but some mode sense pages 811 may still need them */ 812 static int sdebug_heads; /* heads per disk */ 813 static int sdebug_cylinders_per; /* cylinders per surface */ 814 static int sdebug_sectors_per; /* sectors per cylinder */ 815 816 static LIST_HEAD(sdebug_host_list); 817 static DEFINE_SPINLOCK(sdebug_host_list_lock); 818 819 static struct xarray per_store_arr; 820 static struct xarray *per_store_ap = &per_store_arr; 821 static int sdeb_first_idx = -1; /* invalid index ==> none created */ 822 static int sdeb_most_recent_idx = -1; 823 static DEFINE_RWLOCK(sdeb_fake_rw_lck); /* need a RW lock when fake_rw=1 */ 824 825 static unsigned long map_size; 826 static int num_aborts; 827 static int num_dev_resets; 828 static int num_target_resets; 829 static int num_bus_resets; 830 static int num_host_resets; 831 static int dix_writes; 832 static int dix_reads; 833 static int dif_errors; 834 835 /* ZBC global data */ 836 static bool sdeb_zbc_in_use; /* true for host-aware and host-managed disks */ 837 static int sdeb_zbc_zone_cap_mb; 838 static int sdeb_zbc_zone_size_mb; 839 static int sdeb_zbc_max_open = DEF_ZBC_MAX_OPEN_ZONES; 840 static int sdeb_zbc_nr_conv = DEF_ZBC_NR_CONV_ZONES; 841 842 static int submit_queues = DEF_SUBMIT_QUEUES; /* > 1 for multi-queue (mq) */ 843 static int poll_queues; /* iouring iopoll interface.*/ 844 static struct sdebug_queue *sdebug_q_arr; /* ptr to array of submit queues */ 845 846 static DEFINE_RWLOCK(atomic_rw); 847 static DEFINE_RWLOCK(atomic_rw2); 848 849 static rwlock_t *ramdisk_lck_a[2]; 850 851 static char sdebug_proc_name[] = MY_NAME; 852 static const char *my_name = MY_NAME; 853 854 static struct bus_type pseudo_lld_bus; 855 856 static struct device_driver sdebug_driverfs_driver = { 857 .name = sdebug_proc_name, 858 .bus = &pseudo_lld_bus, 859 }; 860 861 static const int check_condition_result = 862 SAM_STAT_CHECK_CONDITION; 863 864 static const int illegal_condition_result = 865 (DID_ABORT << 16) | SAM_STAT_CHECK_CONDITION; 866 867 static const int device_qfull_result = 868 (DID_ABORT << 16) | SAM_STAT_TASK_SET_FULL; 869 870 static const int condition_met_result = SAM_STAT_CONDITION_MET; 871 872 873 /* Only do the extra work involved in logical block provisioning if one or 874 * more of the lbpu, lbpws or lbpws10 parameters are given and we are doing 875 * real reads and writes (i.e. not skipping them for speed). 876 */ 877 static inline bool scsi_debug_lbp(void) 878 { 879 return 0 == sdebug_fake_rw && 880 (sdebug_lbpu || sdebug_lbpws || sdebug_lbpws10); 881 } 882 883 static void *lba2fake_store(struct sdeb_store_info *sip, 884 unsigned long long lba) 885 { 886 struct sdeb_store_info *lsip = sip; 887 888 lba = do_div(lba, sdebug_store_sectors); 889 if (!sip || !sip->storep) { 890 WARN_ON_ONCE(true); 891 lsip = xa_load(per_store_ap, 0); /* should never be NULL */ 892 } 893 return lsip->storep + lba * sdebug_sector_size; 894 } 895 896 static struct t10_pi_tuple *dif_store(struct sdeb_store_info *sip, 897 sector_t sector) 898 { 899 sector = sector_div(sector, sdebug_store_sectors); 900 901 return sip->dif_storep + sector; 902 } 903 904 static void sdebug_max_tgts_luns(void) 905 { 906 struct sdebug_host_info *sdbg_host; 907 struct Scsi_Host *hpnt; 908 909 spin_lock(&sdebug_host_list_lock); 910 list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) { 911 hpnt = sdbg_host->shost; 912 if ((hpnt->this_id >= 0) && 913 (sdebug_num_tgts > hpnt->this_id)) 914 hpnt->max_id = sdebug_num_tgts + 1; 915 else 916 hpnt->max_id = sdebug_num_tgts; 917 /* sdebug_max_luns; */ 918 hpnt->max_lun = SCSI_W_LUN_REPORT_LUNS + 1; 919 } 920 spin_unlock(&sdebug_host_list_lock); 921 } 922 923 enum sdeb_cmd_data {SDEB_IN_DATA = 0, SDEB_IN_CDB = 1}; 924 925 /* Set in_bit to -1 to indicate no bit position of invalid field */ 926 static void mk_sense_invalid_fld(struct scsi_cmnd *scp, 927 enum sdeb_cmd_data c_d, 928 int in_byte, int in_bit) 929 { 930 unsigned char *sbuff; 931 u8 sks[4]; 932 int sl, asc; 933 934 sbuff = scp->sense_buffer; 935 if (!sbuff) { 936 sdev_printk(KERN_ERR, scp->device, 937 "%s: sense_buffer is NULL\n", __func__); 938 return; 939 } 940 asc = c_d ? INVALID_FIELD_IN_CDB : INVALID_FIELD_IN_PARAM_LIST; 941 memset(sbuff, 0, SCSI_SENSE_BUFFERSIZE); 942 scsi_build_sense(scp, sdebug_dsense, ILLEGAL_REQUEST, asc, 0); 943 memset(sks, 0, sizeof(sks)); 944 sks[0] = 0x80; 945 if (c_d) 946 sks[0] |= 0x40; 947 if (in_bit >= 0) { 948 sks[0] |= 0x8; 949 sks[0] |= 0x7 & in_bit; 950 } 951 put_unaligned_be16(in_byte, sks + 1); 952 if (sdebug_dsense) { 953 sl = sbuff[7] + 8; 954 sbuff[7] = sl; 955 sbuff[sl] = 0x2; 956 sbuff[sl + 1] = 0x6; 957 memcpy(sbuff + sl + 4, sks, 3); 958 } else 959 memcpy(sbuff + 15, sks, 3); 960 if (sdebug_verbose) 961 sdev_printk(KERN_INFO, scp->device, "%s: [sense_key,asc,ascq" 962 "]: [0x5,0x%x,0x0] %c byte=%d, bit=%d\n", 963 my_name, asc, c_d ? 'C' : 'D', in_byte, in_bit); 964 } 965 966 static void mk_sense_buffer(struct scsi_cmnd *scp, int key, int asc, int asq) 967 { 968 if (!scp->sense_buffer) { 969 sdev_printk(KERN_ERR, scp->device, 970 "%s: sense_buffer is NULL\n", __func__); 971 return; 972 } 973 memset(scp->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE); 974 975 scsi_build_sense(scp, sdebug_dsense, key, asc, asq); 976 977 if (sdebug_verbose) 978 sdev_printk(KERN_INFO, scp->device, 979 "%s: [sense_key,asc,ascq]: [0x%x,0x%x,0x%x]\n", 980 my_name, key, asc, asq); 981 } 982 983 static void mk_sense_invalid_opcode(struct scsi_cmnd *scp) 984 { 985 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_OPCODE, 0); 986 } 987 988 static int scsi_debug_ioctl(struct scsi_device *dev, unsigned int cmd, 989 void __user *arg) 990 { 991 if (sdebug_verbose) { 992 if (0x1261 == cmd) 993 sdev_printk(KERN_INFO, dev, 994 "%s: BLKFLSBUF [0x1261]\n", __func__); 995 else if (0x5331 == cmd) 996 sdev_printk(KERN_INFO, dev, 997 "%s: CDROM_GET_CAPABILITY [0x5331]\n", 998 __func__); 999 else 1000 sdev_printk(KERN_INFO, dev, "%s: cmd=0x%x\n", 1001 __func__, cmd); 1002 } 1003 return -EINVAL; 1004 /* return -ENOTTY; // correct return but upsets fdisk */ 1005 } 1006 1007 static void config_cdb_len(struct scsi_device *sdev) 1008 { 1009 switch (sdebug_cdb_len) { 1010 case 6: /* suggest 6 byte READ, WRITE and MODE SENSE/SELECT */ 1011 sdev->use_10_for_rw = false; 1012 sdev->use_16_for_rw = false; 1013 sdev->use_10_for_ms = false; 1014 break; 1015 case 10: /* suggest 10 byte RWs and 6 byte MODE SENSE/SELECT */ 1016 sdev->use_10_for_rw = true; 1017 sdev->use_16_for_rw = false; 1018 sdev->use_10_for_ms = false; 1019 break; 1020 case 12: /* suggest 10 byte RWs and 10 byte MODE SENSE/SELECT */ 1021 sdev->use_10_for_rw = true; 1022 sdev->use_16_for_rw = false; 1023 sdev->use_10_for_ms = true; 1024 break; 1025 case 16: 1026 sdev->use_10_for_rw = false; 1027 sdev->use_16_for_rw = true; 1028 sdev->use_10_for_ms = true; 1029 break; 1030 case 32: /* No knobs to suggest this so same as 16 for now */ 1031 sdev->use_10_for_rw = false; 1032 sdev->use_16_for_rw = true; 1033 sdev->use_10_for_ms = true; 1034 break; 1035 default: 1036 pr_warn("unexpected cdb_len=%d, force to 10\n", 1037 sdebug_cdb_len); 1038 sdev->use_10_for_rw = true; 1039 sdev->use_16_for_rw = false; 1040 sdev->use_10_for_ms = false; 1041 sdebug_cdb_len = 10; 1042 break; 1043 } 1044 } 1045 1046 static void all_config_cdb_len(void) 1047 { 1048 struct sdebug_host_info *sdbg_host; 1049 struct Scsi_Host *shost; 1050 struct scsi_device *sdev; 1051 1052 spin_lock(&sdebug_host_list_lock); 1053 list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) { 1054 shost = sdbg_host->shost; 1055 shost_for_each_device(sdev, shost) { 1056 config_cdb_len(sdev); 1057 } 1058 } 1059 spin_unlock(&sdebug_host_list_lock); 1060 } 1061 1062 static void clear_luns_changed_on_target(struct sdebug_dev_info *devip) 1063 { 1064 struct sdebug_host_info *sdhp; 1065 struct sdebug_dev_info *dp; 1066 1067 spin_lock(&sdebug_host_list_lock); 1068 list_for_each_entry(sdhp, &sdebug_host_list, host_list) { 1069 list_for_each_entry(dp, &sdhp->dev_info_list, dev_list) { 1070 if ((devip->sdbg_host == dp->sdbg_host) && 1071 (devip->target == dp->target)) 1072 clear_bit(SDEBUG_UA_LUNS_CHANGED, dp->uas_bm); 1073 } 1074 } 1075 spin_unlock(&sdebug_host_list_lock); 1076 } 1077 1078 static int make_ua(struct scsi_cmnd *scp, struct sdebug_dev_info *devip) 1079 { 1080 int k; 1081 1082 k = find_first_bit(devip->uas_bm, SDEBUG_NUM_UAS); 1083 if (k != SDEBUG_NUM_UAS) { 1084 const char *cp = NULL; 1085 1086 switch (k) { 1087 case SDEBUG_UA_POR: 1088 mk_sense_buffer(scp, UNIT_ATTENTION, UA_RESET_ASC, 1089 POWER_ON_RESET_ASCQ); 1090 if (sdebug_verbose) 1091 cp = "power on reset"; 1092 break; 1093 case SDEBUG_UA_POOCCUR: 1094 mk_sense_buffer(scp, UNIT_ATTENTION, UA_RESET_ASC, 1095 POWER_ON_OCCURRED_ASCQ); 1096 if (sdebug_verbose) 1097 cp = "power on occurred"; 1098 break; 1099 case SDEBUG_UA_BUS_RESET: 1100 mk_sense_buffer(scp, UNIT_ATTENTION, UA_RESET_ASC, 1101 BUS_RESET_ASCQ); 1102 if (sdebug_verbose) 1103 cp = "bus reset"; 1104 break; 1105 case SDEBUG_UA_MODE_CHANGED: 1106 mk_sense_buffer(scp, UNIT_ATTENTION, UA_CHANGED_ASC, 1107 MODE_CHANGED_ASCQ); 1108 if (sdebug_verbose) 1109 cp = "mode parameters changed"; 1110 break; 1111 case SDEBUG_UA_CAPACITY_CHANGED: 1112 mk_sense_buffer(scp, UNIT_ATTENTION, UA_CHANGED_ASC, 1113 CAPACITY_CHANGED_ASCQ); 1114 if (sdebug_verbose) 1115 cp = "capacity data changed"; 1116 break; 1117 case SDEBUG_UA_MICROCODE_CHANGED: 1118 mk_sense_buffer(scp, UNIT_ATTENTION, 1119 TARGET_CHANGED_ASC, 1120 MICROCODE_CHANGED_ASCQ); 1121 if (sdebug_verbose) 1122 cp = "microcode has been changed"; 1123 break; 1124 case SDEBUG_UA_MICROCODE_CHANGED_WO_RESET: 1125 mk_sense_buffer(scp, UNIT_ATTENTION, 1126 TARGET_CHANGED_ASC, 1127 MICROCODE_CHANGED_WO_RESET_ASCQ); 1128 if (sdebug_verbose) 1129 cp = "microcode has been changed without reset"; 1130 break; 1131 case SDEBUG_UA_LUNS_CHANGED: 1132 /* 1133 * SPC-3 behavior is to report a UNIT ATTENTION with 1134 * ASC/ASCQ REPORTED LUNS DATA HAS CHANGED on every LUN 1135 * on the target, until a REPORT LUNS command is 1136 * received. SPC-4 behavior is to report it only once. 1137 * NOTE: sdebug_scsi_level does not use the same 1138 * values as struct scsi_device->scsi_level. 1139 */ 1140 if (sdebug_scsi_level >= 6) /* SPC-4 and above */ 1141 clear_luns_changed_on_target(devip); 1142 mk_sense_buffer(scp, UNIT_ATTENTION, 1143 TARGET_CHANGED_ASC, 1144 LUNS_CHANGED_ASCQ); 1145 if (sdebug_verbose) 1146 cp = "reported luns data has changed"; 1147 break; 1148 default: 1149 pr_warn("unexpected unit attention code=%d\n", k); 1150 if (sdebug_verbose) 1151 cp = "unknown"; 1152 break; 1153 } 1154 clear_bit(k, devip->uas_bm); 1155 if (sdebug_verbose) 1156 sdev_printk(KERN_INFO, scp->device, 1157 "%s reports: Unit attention: %s\n", 1158 my_name, cp); 1159 return check_condition_result; 1160 } 1161 return 0; 1162 } 1163 1164 /* Build SCSI "data-in" buffer. Returns 0 if ok else (DID_ERROR << 16). */ 1165 static int fill_from_dev_buffer(struct scsi_cmnd *scp, unsigned char *arr, 1166 int arr_len) 1167 { 1168 int act_len; 1169 struct scsi_data_buffer *sdb = &scp->sdb; 1170 1171 if (!sdb->length) 1172 return 0; 1173 if (scp->sc_data_direction != DMA_FROM_DEVICE) 1174 return DID_ERROR << 16; 1175 1176 act_len = sg_copy_from_buffer(sdb->table.sgl, sdb->table.nents, 1177 arr, arr_len); 1178 scsi_set_resid(scp, scsi_bufflen(scp) - act_len); 1179 1180 return 0; 1181 } 1182 1183 /* Partial build of SCSI "data-in" buffer. Returns 0 if ok else 1184 * (DID_ERROR << 16). Can write to offset in data-in buffer. If multiple 1185 * calls, not required to write in ascending offset order. Assumes resid 1186 * set to scsi_bufflen() prior to any calls. 1187 */ 1188 static int p_fill_from_dev_buffer(struct scsi_cmnd *scp, const void *arr, 1189 int arr_len, unsigned int off_dst) 1190 { 1191 unsigned int act_len, n; 1192 struct scsi_data_buffer *sdb = &scp->sdb; 1193 off_t skip = off_dst; 1194 1195 if (sdb->length <= off_dst) 1196 return 0; 1197 if (scp->sc_data_direction != DMA_FROM_DEVICE) 1198 return DID_ERROR << 16; 1199 1200 act_len = sg_pcopy_from_buffer(sdb->table.sgl, sdb->table.nents, 1201 arr, arr_len, skip); 1202 pr_debug("%s: off_dst=%u, scsi_bufflen=%u, act_len=%u, resid=%d\n", 1203 __func__, off_dst, scsi_bufflen(scp), act_len, 1204 scsi_get_resid(scp)); 1205 n = scsi_bufflen(scp) - (off_dst + act_len); 1206 scsi_set_resid(scp, min_t(u32, scsi_get_resid(scp), n)); 1207 return 0; 1208 } 1209 1210 /* Fetches from SCSI "data-out" buffer. Returns number of bytes fetched into 1211 * 'arr' or -1 if error. 1212 */ 1213 static int fetch_to_dev_buffer(struct scsi_cmnd *scp, unsigned char *arr, 1214 int arr_len) 1215 { 1216 if (!scsi_bufflen(scp)) 1217 return 0; 1218 if (scp->sc_data_direction != DMA_TO_DEVICE) 1219 return -1; 1220 1221 return scsi_sg_copy_to_buffer(scp, arr, arr_len); 1222 } 1223 1224 1225 static char sdebug_inq_vendor_id[9] = "Linux "; 1226 static char sdebug_inq_product_id[17] = "scsi_debug "; 1227 static char sdebug_inq_product_rev[5] = SDEBUG_VERSION; 1228 /* Use some locally assigned NAAs for SAS addresses. */ 1229 static const u64 naa3_comp_a = 0x3222222000000000ULL; 1230 static const u64 naa3_comp_b = 0x3333333000000000ULL; 1231 static const u64 naa3_comp_c = 0x3111111000000000ULL; 1232 1233 /* Device identification VPD page. Returns number of bytes placed in arr */ 1234 static int inquiry_vpd_83(unsigned char *arr, int port_group_id, 1235 int target_dev_id, int dev_id_num, 1236 const char *dev_id_str, int dev_id_str_len, 1237 const uuid_t *lu_name) 1238 { 1239 int num, port_a; 1240 char b[32]; 1241 1242 port_a = target_dev_id + 1; 1243 /* T10 vendor identifier field format (faked) */ 1244 arr[0] = 0x2; /* ASCII */ 1245 arr[1] = 0x1; 1246 arr[2] = 0x0; 1247 memcpy(&arr[4], sdebug_inq_vendor_id, 8); 1248 memcpy(&arr[12], sdebug_inq_product_id, 16); 1249 memcpy(&arr[28], dev_id_str, dev_id_str_len); 1250 num = 8 + 16 + dev_id_str_len; 1251 arr[3] = num; 1252 num += 4; 1253 if (dev_id_num >= 0) { 1254 if (sdebug_uuid_ctl) { 1255 /* Locally assigned UUID */ 1256 arr[num++] = 0x1; /* binary (not necessarily sas) */ 1257 arr[num++] = 0xa; /* PIV=0, lu, naa */ 1258 arr[num++] = 0x0; 1259 arr[num++] = 0x12; 1260 arr[num++] = 0x10; /* uuid type=1, locally assigned */ 1261 arr[num++] = 0x0; 1262 memcpy(arr + num, lu_name, 16); 1263 num += 16; 1264 } else { 1265 /* NAA-3, Logical unit identifier (binary) */ 1266 arr[num++] = 0x1; /* binary (not necessarily sas) */ 1267 arr[num++] = 0x3; /* PIV=0, lu, naa */ 1268 arr[num++] = 0x0; 1269 arr[num++] = 0x8; 1270 put_unaligned_be64(naa3_comp_b + dev_id_num, arr + num); 1271 num += 8; 1272 } 1273 /* Target relative port number */ 1274 arr[num++] = 0x61; /* proto=sas, binary */ 1275 arr[num++] = 0x94; /* PIV=1, target port, rel port */ 1276 arr[num++] = 0x0; /* reserved */ 1277 arr[num++] = 0x4; /* length */ 1278 arr[num++] = 0x0; /* reserved */ 1279 arr[num++] = 0x0; /* reserved */ 1280 arr[num++] = 0x0; 1281 arr[num++] = 0x1; /* relative port A */ 1282 } 1283 /* NAA-3, Target port identifier */ 1284 arr[num++] = 0x61; /* proto=sas, binary */ 1285 arr[num++] = 0x93; /* piv=1, target port, naa */ 1286 arr[num++] = 0x0; 1287 arr[num++] = 0x8; 1288 put_unaligned_be64(naa3_comp_a + port_a, arr + num); 1289 num += 8; 1290 /* NAA-3, Target port group identifier */ 1291 arr[num++] = 0x61; /* proto=sas, binary */ 1292 arr[num++] = 0x95; /* piv=1, target port group id */ 1293 arr[num++] = 0x0; 1294 arr[num++] = 0x4; 1295 arr[num++] = 0; 1296 arr[num++] = 0; 1297 put_unaligned_be16(port_group_id, arr + num); 1298 num += 2; 1299 /* NAA-3, Target device identifier */ 1300 arr[num++] = 0x61; /* proto=sas, binary */ 1301 arr[num++] = 0xa3; /* piv=1, target device, naa */ 1302 arr[num++] = 0x0; 1303 arr[num++] = 0x8; 1304 put_unaligned_be64(naa3_comp_a + target_dev_id, arr + num); 1305 num += 8; 1306 /* SCSI name string: Target device identifier */ 1307 arr[num++] = 0x63; /* proto=sas, UTF-8 */ 1308 arr[num++] = 0xa8; /* piv=1, target device, SCSI name string */ 1309 arr[num++] = 0x0; 1310 arr[num++] = 24; 1311 memcpy(arr + num, "naa.32222220", 12); 1312 num += 12; 1313 snprintf(b, sizeof(b), "%08X", target_dev_id); 1314 memcpy(arr + num, b, 8); 1315 num += 8; 1316 memset(arr + num, 0, 4); 1317 num += 4; 1318 return num; 1319 } 1320 1321 static unsigned char vpd84_data[] = { 1322 /* from 4th byte */ 0x22,0x22,0x22,0x0,0xbb,0x0, 1323 0x22,0x22,0x22,0x0,0xbb,0x1, 1324 0x22,0x22,0x22,0x0,0xbb,0x2, 1325 }; 1326 1327 /* Software interface identification VPD page */ 1328 static int inquiry_vpd_84(unsigned char *arr) 1329 { 1330 memcpy(arr, vpd84_data, sizeof(vpd84_data)); 1331 return sizeof(vpd84_data); 1332 } 1333 1334 /* Management network addresses VPD page */ 1335 static int inquiry_vpd_85(unsigned char *arr) 1336 { 1337 int num = 0; 1338 const char *na1 = "https://www.kernel.org/config"; 1339 const char *na2 = "http://www.kernel.org/log"; 1340 int plen, olen; 1341 1342 arr[num++] = 0x1; /* lu, storage config */ 1343 arr[num++] = 0x0; /* reserved */ 1344 arr[num++] = 0x0; 1345 olen = strlen(na1); 1346 plen = olen + 1; 1347 if (plen % 4) 1348 plen = ((plen / 4) + 1) * 4; 1349 arr[num++] = plen; /* length, null termianted, padded */ 1350 memcpy(arr + num, na1, olen); 1351 memset(arr + num + olen, 0, plen - olen); 1352 num += plen; 1353 1354 arr[num++] = 0x4; /* lu, logging */ 1355 arr[num++] = 0x0; /* reserved */ 1356 arr[num++] = 0x0; 1357 olen = strlen(na2); 1358 plen = olen + 1; 1359 if (plen % 4) 1360 plen = ((plen / 4) + 1) * 4; 1361 arr[num++] = plen; /* length, null terminated, padded */ 1362 memcpy(arr + num, na2, olen); 1363 memset(arr + num + olen, 0, plen - olen); 1364 num += plen; 1365 1366 return num; 1367 } 1368 1369 /* SCSI ports VPD page */ 1370 static int inquiry_vpd_88(unsigned char *arr, int target_dev_id) 1371 { 1372 int num = 0; 1373 int port_a, port_b; 1374 1375 port_a = target_dev_id + 1; 1376 port_b = port_a + 1; 1377 arr[num++] = 0x0; /* reserved */ 1378 arr[num++] = 0x0; /* reserved */ 1379 arr[num++] = 0x0; 1380 arr[num++] = 0x1; /* relative port 1 (primary) */ 1381 memset(arr + num, 0, 6); 1382 num += 6; 1383 arr[num++] = 0x0; 1384 arr[num++] = 12; /* length tp descriptor */ 1385 /* naa-5 target port identifier (A) */ 1386 arr[num++] = 0x61; /* proto=sas, binary */ 1387 arr[num++] = 0x93; /* PIV=1, target port, NAA */ 1388 arr[num++] = 0x0; /* reserved */ 1389 arr[num++] = 0x8; /* length */ 1390 put_unaligned_be64(naa3_comp_a + port_a, arr + num); 1391 num += 8; 1392 arr[num++] = 0x0; /* reserved */ 1393 arr[num++] = 0x0; /* reserved */ 1394 arr[num++] = 0x0; 1395 arr[num++] = 0x2; /* relative port 2 (secondary) */ 1396 memset(arr + num, 0, 6); 1397 num += 6; 1398 arr[num++] = 0x0; 1399 arr[num++] = 12; /* length tp descriptor */ 1400 /* naa-5 target port identifier (B) */ 1401 arr[num++] = 0x61; /* proto=sas, binary */ 1402 arr[num++] = 0x93; /* PIV=1, target port, NAA */ 1403 arr[num++] = 0x0; /* reserved */ 1404 arr[num++] = 0x8; /* length */ 1405 put_unaligned_be64(naa3_comp_a + port_b, arr + num); 1406 num += 8; 1407 1408 return num; 1409 } 1410 1411 1412 static unsigned char vpd89_data[] = { 1413 /* from 4th byte */ 0,0,0,0, 1414 'l','i','n','u','x',' ',' ',' ', 1415 'S','A','T',' ','s','c','s','i','_','d','e','b','u','g',' ',' ', 1416 '1','2','3','4', 1417 0x34,0,0,0,1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0, 1418 0xec,0,0,0, 1419 0x5a,0xc,0xff,0x3f,0x37,0xc8,0x10,0,0,0,0,0,0x3f,0,0,0, 1420 0,0,0,0,0x58,0x58,0x58,0x58,0x58,0x58,0x58,0x58,0x20,0x20,0x20,0x20, 1421 0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0,0,0,0x40,0x4,0,0x2e,0x33, 1422 0x38,0x31,0x20,0x20,0x20,0x20,0x54,0x53,0x38,0x33,0x30,0x30,0x33,0x31, 1423 0x53,0x41, 1424 0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20, 1425 0x20,0x20, 1426 0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20, 1427 0x10,0x80, 1428 0,0,0,0x2f,0,0,0,0x2,0,0x2,0x7,0,0xff,0xff,0x1,0, 1429 0x3f,0,0xc1,0xff,0x3e,0,0x10,0x1,0xb0,0xf8,0x50,0x9,0,0,0x7,0, 1430 0x3,0,0x78,0,0x78,0,0xf0,0,0x78,0,0,0,0,0,0,0, 1431 0,0,0,0,0,0,0,0,0x2,0,0,0,0,0,0,0, 1432 0x7e,0,0x1b,0,0x6b,0x34,0x1,0x7d,0x3,0x40,0x69,0x34,0x1,0x3c,0x3,0x40, 1433 0x7f,0x40,0,0,0,0,0xfe,0xfe,0,0,0,0,0,0xfe,0,0, 1434 0,0,0,0,0,0,0,0,0xb0,0xf8,0x50,0x9,0,0,0,0, 1435 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 1436 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 1437 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 1438 0x1,0,0xb0,0xf8,0x50,0x9,0xb0,0xf8,0x50,0x9,0x20,0x20,0x2,0,0xb6,0x42, 1439 0,0x80,0x8a,0,0x6,0x3c,0xa,0x3c,0xff,0xff,0xc6,0x7,0,0x1,0,0x8, 1440 0xf0,0xf,0,0x10,0x2,0,0x30,0,0,0,0,0,0,0,0x6,0xfe, 1441 0,0,0x2,0,0x50,0,0x8a,0,0x4f,0x95,0,0,0x21,0,0xb,0, 1442 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 1443 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 1444 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 1445 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 1446 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 1447 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 1448 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 1449 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 1450 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 1451 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 1452 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 1453 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0xa5,0x51, 1454 }; 1455 1456 /* ATA Information VPD page */ 1457 static int inquiry_vpd_89(unsigned char *arr) 1458 { 1459 memcpy(arr, vpd89_data, sizeof(vpd89_data)); 1460 return sizeof(vpd89_data); 1461 } 1462 1463 1464 static unsigned char vpdb0_data[] = { 1465 /* from 4th byte */ 0,0,0,4, 0,0,0x4,0, 0,0,0,64, 1466 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 1467 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 1468 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 1469 }; 1470 1471 /* Block limits VPD page (SBC-3) */ 1472 static int inquiry_vpd_b0(unsigned char *arr) 1473 { 1474 unsigned int gran; 1475 1476 memcpy(arr, vpdb0_data, sizeof(vpdb0_data)); 1477 1478 /* Optimal transfer length granularity */ 1479 if (sdebug_opt_xferlen_exp != 0 && 1480 sdebug_physblk_exp < sdebug_opt_xferlen_exp) 1481 gran = 1 << sdebug_opt_xferlen_exp; 1482 else 1483 gran = 1 << sdebug_physblk_exp; 1484 put_unaligned_be16(gran, arr + 2); 1485 1486 /* Maximum Transfer Length */ 1487 if (sdebug_store_sectors > 0x400) 1488 put_unaligned_be32(sdebug_store_sectors, arr + 4); 1489 1490 /* Optimal Transfer Length */ 1491 put_unaligned_be32(sdebug_opt_blks, &arr[8]); 1492 1493 if (sdebug_lbpu) { 1494 /* Maximum Unmap LBA Count */ 1495 put_unaligned_be32(sdebug_unmap_max_blocks, &arr[16]); 1496 1497 /* Maximum Unmap Block Descriptor Count */ 1498 put_unaligned_be32(sdebug_unmap_max_desc, &arr[20]); 1499 } 1500 1501 /* Unmap Granularity Alignment */ 1502 if (sdebug_unmap_alignment) { 1503 put_unaligned_be32(sdebug_unmap_alignment, &arr[28]); 1504 arr[28] |= 0x80; /* UGAVALID */ 1505 } 1506 1507 /* Optimal Unmap Granularity */ 1508 put_unaligned_be32(sdebug_unmap_granularity, &arr[24]); 1509 1510 /* Maximum WRITE SAME Length */ 1511 put_unaligned_be64(sdebug_write_same_length, &arr[32]); 1512 1513 return 0x3c; /* Mandatory page length for Logical Block Provisioning */ 1514 1515 return sizeof(vpdb0_data); 1516 } 1517 1518 /* Block device characteristics VPD page (SBC-3) */ 1519 static int inquiry_vpd_b1(struct sdebug_dev_info *devip, unsigned char *arr) 1520 { 1521 memset(arr, 0, 0x3c); 1522 arr[0] = 0; 1523 arr[1] = 1; /* non rotating medium (e.g. solid state) */ 1524 arr[2] = 0; 1525 arr[3] = 5; /* less than 1.8" */ 1526 if (devip->zmodel == BLK_ZONED_HA) 1527 arr[4] = 1 << 4; /* zoned field = 01b */ 1528 1529 return 0x3c; 1530 } 1531 1532 /* Logical block provisioning VPD page (SBC-4) */ 1533 static int inquiry_vpd_b2(unsigned char *arr) 1534 { 1535 memset(arr, 0, 0x4); 1536 arr[0] = 0; /* threshold exponent */ 1537 if (sdebug_lbpu) 1538 arr[1] = 1 << 7; 1539 if (sdebug_lbpws) 1540 arr[1] |= 1 << 6; 1541 if (sdebug_lbpws10) 1542 arr[1] |= 1 << 5; 1543 if (sdebug_lbprz && scsi_debug_lbp()) 1544 arr[1] |= (sdebug_lbprz & 0x7) << 2; /* sbc4r07 and later */ 1545 /* anc_sup=0; dp=0 (no provisioning group descriptor) */ 1546 /* minimum_percentage=0; provisioning_type=0 (unknown) */ 1547 /* threshold_percentage=0 */ 1548 return 0x4; 1549 } 1550 1551 /* Zoned block device characteristics VPD page (ZBC mandatory) */ 1552 static int inquiry_vpd_b6(struct sdebug_dev_info *devip, unsigned char *arr) 1553 { 1554 memset(arr, 0, 0x3c); 1555 arr[0] = 0x1; /* set URSWRZ (unrestricted read in seq. wr req zone) */ 1556 /* 1557 * Set Optimal number of open sequential write preferred zones and 1558 * Optimal number of non-sequentially written sequential write 1559 * preferred zones fields to 'not reported' (0xffffffff). Leave other 1560 * fields set to zero, apart from Max. number of open swrz_s field. 1561 */ 1562 put_unaligned_be32(0xffffffff, &arr[4]); 1563 put_unaligned_be32(0xffffffff, &arr[8]); 1564 if (sdeb_zbc_model == BLK_ZONED_HM && devip->max_open) 1565 put_unaligned_be32(devip->max_open, &arr[12]); 1566 else 1567 put_unaligned_be32(0xffffffff, &arr[12]); 1568 if (devip->zcap < devip->zsize) { 1569 arr[19] = ZBC_CONSTANT_ZONE_START_OFFSET; 1570 put_unaligned_be64(devip->zsize, &arr[20]); 1571 } else { 1572 arr[19] = 0; 1573 } 1574 return 0x3c; 1575 } 1576 1577 #define SDEBUG_LONG_INQ_SZ 96 1578 #define SDEBUG_MAX_INQ_ARR_SZ 584 1579 1580 static int resp_inquiry(struct scsi_cmnd *scp, struct sdebug_dev_info *devip) 1581 { 1582 unsigned char pq_pdt; 1583 unsigned char *arr; 1584 unsigned char *cmd = scp->cmnd; 1585 u32 alloc_len, n; 1586 int ret; 1587 bool have_wlun, is_disk, is_zbc, is_disk_zbc; 1588 1589 alloc_len = get_unaligned_be16(cmd + 3); 1590 arr = kzalloc(SDEBUG_MAX_INQ_ARR_SZ, GFP_ATOMIC); 1591 if (! arr) 1592 return DID_REQUEUE << 16; 1593 is_disk = (sdebug_ptype == TYPE_DISK); 1594 is_zbc = (devip->zmodel != BLK_ZONED_NONE); 1595 is_disk_zbc = (is_disk || is_zbc); 1596 have_wlun = scsi_is_wlun(scp->device->lun); 1597 if (have_wlun) 1598 pq_pdt = TYPE_WLUN; /* present, wlun */ 1599 else if (sdebug_no_lun_0 && (devip->lun == SDEBUG_LUN_0_VAL)) 1600 pq_pdt = 0x7f; /* not present, PQ=3, PDT=0x1f */ 1601 else 1602 pq_pdt = (sdebug_ptype & 0x1f); 1603 arr[0] = pq_pdt; 1604 if (0x2 & cmd[1]) { /* CMDDT bit set */ 1605 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 1); 1606 kfree(arr); 1607 return check_condition_result; 1608 } else if (0x1 & cmd[1]) { /* EVPD bit set */ 1609 int lu_id_num, port_group_id, target_dev_id; 1610 u32 len; 1611 char lu_id_str[6]; 1612 int host_no = devip->sdbg_host->shost->host_no; 1613 1614 port_group_id = (((host_no + 1) & 0x7f) << 8) + 1615 (devip->channel & 0x7f); 1616 if (sdebug_vpd_use_hostno == 0) 1617 host_no = 0; 1618 lu_id_num = have_wlun ? -1 : (((host_no + 1) * 2000) + 1619 (devip->target * 1000) + devip->lun); 1620 target_dev_id = ((host_no + 1) * 2000) + 1621 (devip->target * 1000) - 3; 1622 len = scnprintf(lu_id_str, 6, "%d", lu_id_num); 1623 if (0 == cmd[2]) { /* supported vital product data pages */ 1624 arr[1] = cmd[2]; /*sanity */ 1625 n = 4; 1626 arr[n++] = 0x0; /* this page */ 1627 arr[n++] = 0x80; /* unit serial number */ 1628 arr[n++] = 0x83; /* device identification */ 1629 arr[n++] = 0x84; /* software interface ident. */ 1630 arr[n++] = 0x85; /* management network addresses */ 1631 arr[n++] = 0x86; /* extended inquiry */ 1632 arr[n++] = 0x87; /* mode page policy */ 1633 arr[n++] = 0x88; /* SCSI ports */ 1634 if (is_disk_zbc) { /* SBC or ZBC */ 1635 arr[n++] = 0x89; /* ATA information */ 1636 arr[n++] = 0xb0; /* Block limits */ 1637 arr[n++] = 0xb1; /* Block characteristics */ 1638 if (is_disk) 1639 arr[n++] = 0xb2; /* LB Provisioning */ 1640 if (is_zbc) 1641 arr[n++] = 0xb6; /* ZB dev. char. */ 1642 } 1643 arr[3] = n - 4; /* number of supported VPD pages */ 1644 } else if (0x80 == cmd[2]) { /* unit serial number */ 1645 arr[1] = cmd[2]; /*sanity */ 1646 arr[3] = len; 1647 memcpy(&arr[4], lu_id_str, len); 1648 } else if (0x83 == cmd[2]) { /* device identification */ 1649 arr[1] = cmd[2]; /*sanity */ 1650 arr[3] = inquiry_vpd_83(&arr[4], port_group_id, 1651 target_dev_id, lu_id_num, 1652 lu_id_str, len, 1653 &devip->lu_name); 1654 } else if (0x84 == cmd[2]) { /* Software interface ident. */ 1655 arr[1] = cmd[2]; /*sanity */ 1656 arr[3] = inquiry_vpd_84(&arr[4]); 1657 } else if (0x85 == cmd[2]) { /* Management network addresses */ 1658 arr[1] = cmd[2]; /*sanity */ 1659 arr[3] = inquiry_vpd_85(&arr[4]); 1660 } else if (0x86 == cmd[2]) { /* extended inquiry */ 1661 arr[1] = cmd[2]; /*sanity */ 1662 arr[3] = 0x3c; /* number of following entries */ 1663 if (sdebug_dif == T10_PI_TYPE3_PROTECTION) 1664 arr[4] = 0x4; /* SPT: GRD_CHK:1 */ 1665 else if (have_dif_prot) 1666 arr[4] = 0x5; /* SPT: GRD_CHK:1, REF_CHK:1 */ 1667 else 1668 arr[4] = 0x0; /* no protection stuff */ 1669 arr[5] = 0x7; /* head of q, ordered + simple q's */ 1670 } else if (0x87 == cmd[2]) { /* mode page policy */ 1671 arr[1] = cmd[2]; /*sanity */ 1672 arr[3] = 0x8; /* number of following entries */ 1673 arr[4] = 0x2; /* disconnect-reconnect mp */ 1674 arr[6] = 0x80; /* mlus, shared */ 1675 arr[8] = 0x18; /* protocol specific lu */ 1676 arr[10] = 0x82; /* mlus, per initiator port */ 1677 } else if (0x88 == cmd[2]) { /* SCSI Ports */ 1678 arr[1] = cmd[2]; /*sanity */ 1679 arr[3] = inquiry_vpd_88(&arr[4], target_dev_id); 1680 } else if (is_disk_zbc && 0x89 == cmd[2]) { /* ATA info */ 1681 arr[1] = cmd[2]; /*sanity */ 1682 n = inquiry_vpd_89(&arr[4]); 1683 put_unaligned_be16(n, arr + 2); 1684 } else if (is_disk_zbc && 0xb0 == cmd[2]) { /* Block limits */ 1685 arr[1] = cmd[2]; /*sanity */ 1686 arr[3] = inquiry_vpd_b0(&arr[4]); 1687 } else if (is_disk_zbc && 0xb1 == cmd[2]) { /* Block char. */ 1688 arr[1] = cmd[2]; /*sanity */ 1689 arr[3] = inquiry_vpd_b1(devip, &arr[4]); 1690 } else if (is_disk && 0xb2 == cmd[2]) { /* LB Prov. */ 1691 arr[1] = cmd[2]; /*sanity */ 1692 arr[3] = inquiry_vpd_b2(&arr[4]); 1693 } else if (is_zbc && cmd[2] == 0xb6) { /* ZB dev. charact. */ 1694 arr[1] = cmd[2]; /*sanity */ 1695 arr[3] = inquiry_vpd_b6(devip, &arr[4]); 1696 } else { 1697 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, -1); 1698 kfree(arr); 1699 return check_condition_result; 1700 } 1701 len = min_t(u32, get_unaligned_be16(arr + 2) + 4, alloc_len); 1702 ret = fill_from_dev_buffer(scp, arr, 1703 min_t(u32, len, SDEBUG_MAX_INQ_ARR_SZ)); 1704 kfree(arr); 1705 return ret; 1706 } 1707 /* drops through here for a standard inquiry */ 1708 arr[1] = sdebug_removable ? 0x80 : 0; /* Removable disk */ 1709 arr[2] = sdebug_scsi_level; 1710 arr[3] = 2; /* response_data_format==2 */ 1711 arr[4] = SDEBUG_LONG_INQ_SZ - 5; 1712 arr[5] = (int)have_dif_prot; /* PROTECT bit */ 1713 if (sdebug_vpd_use_hostno == 0) 1714 arr[5] |= 0x10; /* claim: implicit TPGS */ 1715 arr[6] = 0x10; /* claim: MultiP */ 1716 /* arr[6] |= 0x40; ... claim: EncServ (enclosure services) */ 1717 arr[7] = 0xa; /* claim: LINKED + CMDQUE */ 1718 memcpy(&arr[8], sdebug_inq_vendor_id, 8); 1719 memcpy(&arr[16], sdebug_inq_product_id, 16); 1720 memcpy(&arr[32], sdebug_inq_product_rev, 4); 1721 /* Use Vendor Specific area to place driver date in ASCII hex */ 1722 memcpy(&arr[36], sdebug_version_date, 8); 1723 /* version descriptors (2 bytes each) follow */ 1724 put_unaligned_be16(0xc0, arr + 58); /* SAM-6 no version claimed */ 1725 put_unaligned_be16(0x5c0, arr + 60); /* SPC-5 no version claimed */ 1726 n = 62; 1727 if (is_disk) { /* SBC-4 no version claimed */ 1728 put_unaligned_be16(0x600, arr + n); 1729 n += 2; 1730 } else if (sdebug_ptype == TYPE_TAPE) { /* SSC-4 rev 3 */ 1731 put_unaligned_be16(0x525, arr + n); 1732 n += 2; 1733 } else if (is_zbc) { /* ZBC BSR INCITS 536 revision 05 */ 1734 put_unaligned_be16(0x624, arr + n); 1735 n += 2; 1736 } 1737 put_unaligned_be16(0x2100, arr + n); /* SPL-4 no version claimed */ 1738 ret = fill_from_dev_buffer(scp, arr, 1739 min_t(u32, alloc_len, SDEBUG_LONG_INQ_SZ)); 1740 kfree(arr); 1741 return ret; 1742 } 1743 1744 /* See resp_iec_m_pg() for how this data is manipulated */ 1745 static unsigned char iec_m_pg[] = {0x1c, 0xa, 0x08, 0, 0, 0, 0, 0, 1746 0, 0, 0x0, 0x0}; 1747 1748 static int resp_requests(struct scsi_cmnd *scp, 1749 struct sdebug_dev_info *devip) 1750 { 1751 unsigned char *cmd = scp->cmnd; 1752 unsigned char arr[SCSI_SENSE_BUFFERSIZE]; /* assume >= 18 bytes */ 1753 bool dsense = !!(cmd[1] & 1); 1754 u32 alloc_len = cmd[4]; 1755 u32 len = 18; 1756 int stopped_state = atomic_read(&devip->stopped); 1757 1758 memset(arr, 0, sizeof(arr)); 1759 if (stopped_state > 0) { /* some "pollable" data [spc6r02: 5.12.2] */ 1760 if (dsense) { 1761 arr[0] = 0x72; 1762 arr[1] = NOT_READY; 1763 arr[2] = LOGICAL_UNIT_NOT_READY; 1764 arr[3] = (stopped_state == 2) ? 0x1 : 0x2; 1765 len = 8; 1766 } else { 1767 arr[0] = 0x70; 1768 arr[2] = NOT_READY; /* NO_SENSE in sense_key */ 1769 arr[7] = 0xa; /* 18 byte sense buffer */ 1770 arr[12] = LOGICAL_UNIT_NOT_READY; 1771 arr[13] = (stopped_state == 2) ? 0x1 : 0x2; 1772 } 1773 } else if ((iec_m_pg[2] & 0x4) && (6 == (iec_m_pg[3] & 0xf))) { 1774 /* Information exceptions control mode page: TEST=1, MRIE=6 */ 1775 if (dsense) { 1776 arr[0] = 0x72; 1777 arr[1] = 0x0; /* NO_SENSE in sense_key */ 1778 arr[2] = THRESHOLD_EXCEEDED; 1779 arr[3] = 0xff; /* Failure prediction(false) */ 1780 len = 8; 1781 } else { 1782 arr[0] = 0x70; 1783 arr[2] = 0x0; /* NO_SENSE in sense_key */ 1784 arr[7] = 0xa; /* 18 byte sense buffer */ 1785 arr[12] = THRESHOLD_EXCEEDED; 1786 arr[13] = 0xff; /* Failure prediction(false) */ 1787 } 1788 } else { /* nothing to report */ 1789 if (dsense) { 1790 len = 8; 1791 memset(arr, 0, len); 1792 arr[0] = 0x72; 1793 } else { 1794 memset(arr, 0, len); 1795 arr[0] = 0x70; 1796 arr[7] = 0xa; 1797 } 1798 } 1799 return fill_from_dev_buffer(scp, arr, min_t(u32, len, alloc_len)); 1800 } 1801 1802 static int resp_start_stop(struct scsi_cmnd *scp, struct sdebug_dev_info *devip) 1803 { 1804 unsigned char *cmd = scp->cmnd; 1805 int power_cond, want_stop, stopped_state; 1806 bool changing; 1807 1808 power_cond = (cmd[4] & 0xf0) >> 4; 1809 if (power_cond) { 1810 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 4, 7); 1811 return check_condition_result; 1812 } 1813 want_stop = !(cmd[4] & 1); 1814 stopped_state = atomic_read(&devip->stopped); 1815 if (stopped_state == 2) { 1816 ktime_t now_ts = ktime_get_boottime(); 1817 1818 if (ktime_to_ns(now_ts) > ktime_to_ns(devip->create_ts)) { 1819 u64 diff_ns = ktime_to_ns(ktime_sub(now_ts, devip->create_ts)); 1820 1821 if (diff_ns >= ((u64)sdeb_tur_ms_to_ready * 1000000)) { 1822 /* tur_ms_to_ready timer extinguished */ 1823 atomic_set(&devip->stopped, 0); 1824 stopped_state = 0; 1825 } 1826 } 1827 if (stopped_state == 2) { 1828 if (want_stop) { 1829 stopped_state = 1; /* dummy up success */ 1830 } else { /* Disallow tur_ms_to_ready delay to be overridden */ 1831 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 4, 0 /* START bit */); 1832 return check_condition_result; 1833 } 1834 } 1835 } 1836 changing = (stopped_state != want_stop); 1837 if (changing) 1838 atomic_xchg(&devip->stopped, want_stop); 1839 if (!changing || (cmd[1] & 0x1)) /* state unchanged or IMMED bit set in cdb */ 1840 return SDEG_RES_IMMED_MASK; 1841 else 1842 return 0; 1843 } 1844 1845 static sector_t get_sdebug_capacity(void) 1846 { 1847 static const unsigned int gibibyte = 1073741824; 1848 1849 if (sdebug_virtual_gb > 0) 1850 return (sector_t)sdebug_virtual_gb * 1851 (gibibyte / sdebug_sector_size); 1852 else 1853 return sdebug_store_sectors; 1854 } 1855 1856 #define SDEBUG_READCAP_ARR_SZ 8 1857 static int resp_readcap(struct scsi_cmnd *scp, 1858 struct sdebug_dev_info *devip) 1859 { 1860 unsigned char arr[SDEBUG_READCAP_ARR_SZ]; 1861 unsigned int capac; 1862 1863 /* following just in case virtual_gb changed */ 1864 sdebug_capacity = get_sdebug_capacity(); 1865 memset(arr, 0, SDEBUG_READCAP_ARR_SZ); 1866 if (sdebug_capacity < 0xffffffff) { 1867 capac = (unsigned int)sdebug_capacity - 1; 1868 put_unaligned_be32(capac, arr + 0); 1869 } else 1870 put_unaligned_be32(0xffffffff, arr + 0); 1871 put_unaligned_be16(sdebug_sector_size, arr + 6); 1872 return fill_from_dev_buffer(scp, arr, SDEBUG_READCAP_ARR_SZ); 1873 } 1874 1875 #define SDEBUG_READCAP16_ARR_SZ 32 1876 static int resp_readcap16(struct scsi_cmnd *scp, 1877 struct sdebug_dev_info *devip) 1878 { 1879 unsigned char *cmd = scp->cmnd; 1880 unsigned char arr[SDEBUG_READCAP16_ARR_SZ]; 1881 u32 alloc_len; 1882 1883 alloc_len = get_unaligned_be32(cmd + 10); 1884 /* following just in case virtual_gb changed */ 1885 sdebug_capacity = get_sdebug_capacity(); 1886 memset(arr, 0, SDEBUG_READCAP16_ARR_SZ); 1887 put_unaligned_be64((u64)(sdebug_capacity - 1), arr + 0); 1888 put_unaligned_be32(sdebug_sector_size, arr + 8); 1889 arr[13] = sdebug_physblk_exp & 0xf; 1890 arr[14] = (sdebug_lowest_aligned >> 8) & 0x3f; 1891 1892 if (scsi_debug_lbp()) { 1893 arr[14] |= 0x80; /* LBPME */ 1894 /* from sbc4r07, this LBPRZ field is 1 bit, but the LBPRZ in 1895 * the LB Provisioning VPD page is 3 bits. Note that lbprz=2 1896 * in the wider field maps to 0 in this field. 1897 */ 1898 if (sdebug_lbprz & 1) /* precisely what the draft requires */ 1899 arr[14] |= 0x40; 1900 } 1901 1902 /* 1903 * Since the scsi_debug READ CAPACITY implementation always reports the 1904 * total disk capacity, set RC BASIS = 1 for host-managed ZBC devices. 1905 */ 1906 if (devip->zmodel == BLK_ZONED_HM) 1907 arr[12] |= 1 << 4; 1908 1909 arr[15] = sdebug_lowest_aligned & 0xff; 1910 1911 if (have_dif_prot) { 1912 arr[12] = (sdebug_dif - 1) << 1; /* P_TYPE */ 1913 arr[12] |= 1; /* PROT_EN */ 1914 } 1915 1916 return fill_from_dev_buffer(scp, arr, 1917 min_t(u32, alloc_len, SDEBUG_READCAP16_ARR_SZ)); 1918 } 1919 1920 #define SDEBUG_MAX_TGTPGS_ARR_SZ 1412 1921 1922 static int resp_report_tgtpgs(struct scsi_cmnd *scp, 1923 struct sdebug_dev_info *devip) 1924 { 1925 unsigned char *cmd = scp->cmnd; 1926 unsigned char *arr; 1927 int host_no = devip->sdbg_host->shost->host_no; 1928 int port_group_a, port_group_b, port_a, port_b; 1929 u32 alen, n, rlen; 1930 int ret; 1931 1932 alen = get_unaligned_be32(cmd + 6); 1933 arr = kzalloc(SDEBUG_MAX_TGTPGS_ARR_SZ, GFP_ATOMIC); 1934 if (! arr) 1935 return DID_REQUEUE << 16; 1936 /* 1937 * EVPD page 0x88 states we have two ports, one 1938 * real and a fake port with no device connected. 1939 * So we create two port groups with one port each 1940 * and set the group with port B to unavailable. 1941 */ 1942 port_a = 0x1; /* relative port A */ 1943 port_b = 0x2; /* relative port B */ 1944 port_group_a = (((host_no + 1) & 0x7f) << 8) + 1945 (devip->channel & 0x7f); 1946 port_group_b = (((host_no + 1) & 0x7f) << 8) + 1947 (devip->channel & 0x7f) + 0x80; 1948 1949 /* 1950 * The asymmetric access state is cycled according to the host_id. 1951 */ 1952 n = 4; 1953 if (sdebug_vpd_use_hostno == 0) { 1954 arr[n++] = host_no % 3; /* Asymm access state */ 1955 arr[n++] = 0x0F; /* claim: all states are supported */ 1956 } else { 1957 arr[n++] = 0x0; /* Active/Optimized path */ 1958 arr[n++] = 0x01; /* only support active/optimized paths */ 1959 } 1960 put_unaligned_be16(port_group_a, arr + n); 1961 n += 2; 1962 arr[n++] = 0; /* Reserved */ 1963 arr[n++] = 0; /* Status code */ 1964 arr[n++] = 0; /* Vendor unique */ 1965 arr[n++] = 0x1; /* One port per group */ 1966 arr[n++] = 0; /* Reserved */ 1967 arr[n++] = 0; /* Reserved */ 1968 put_unaligned_be16(port_a, arr + n); 1969 n += 2; 1970 arr[n++] = 3; /* Port unavailable */ 1971 arr[n++] = 0x08; /* claim: only unavailalbe paths are supported */ 1972 put_unaligned_be16(port_group_b, arr + n); 1973 n += 2; 1974 arr[n++] = 0; /* Reserved */ 1975 arr[n++] = 0; /* Status code */ 1976 arr[n++] = 0; /* Vendor unique */ 1977 arr[n++] = 0x1; /* One port per group */ 1978 arr[n++] = 0; /* Reserved */ 1979 arr[n++] = 0; /* Reserved */ 1980 put_unaligned_be16(port_b, arr + n); 1981 n += 2; 1982 1983 rlen = n - 4; 1984 put_unaligned_be32(rlen, arr + 0); 1985 1986 /* 1987 * Return the smallest value of either 1988 * - The allocated length 1989 * - The constructed command length 1990 * - The maximum array size 1991 */ 1992 rlen = min(alen, n); 1993 ret = fill_from_dev_buffer(scp, arr, 1994 min_t(u32, rlen, SDEBUG_MAX_TGTPGS_ARR_SZ)); 1995 kfree(arr); 1996 return ret; 1997 } 1998 1999 static int resp_rsup_opcodes(struct scsi_cmnd *scp, 2000 struct sdebug_dev_info *devip) 2001 { 2002 bool rctd; 2003 u8 reporting_opts, req_opcode, sdeb_i, supp; 2004 u16 req_sa, u; 2005 u32 alloc_len, a_len; 2006 int k, offset, len, errsts, count, bump, na; 2007 const struct opcode_info_t *oip; 2008 const struct opcode_info_t *r_oip; 2009 u8 *arr; 2010 u8 *cmd = scp->cmnd; 2011 2012 rctd = !!(cmd[2] & 0x80); 2013 reporting_opts = cmd[2] & 0x7; 2014 req_opcode = cmd[3]; 2015 req_sa = get_unaligned_be16(cmd + 4); 2016 alloc_len = get_unaligned_be32(cmd + 6); 2017 if (alloc_len < 4 || alloc_len > 0xffff) { 2018 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 6, -1); 2019 return check_condition_result; 2020 } 2021 if (alloc_len > 8192) 2022 a_len = 8192; 2023 else 2024 a_len = alloc_len; 2025 arr = kzalloc((a_len < 256) ? 320 : a_len + 64, GFP_ATOMIC); 2026 if (NULL == arr) { 2027 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC, 2028 INSUFF_RES_ASCQ); 2029 return check_condition_result; 2030 } 2031 switch (reporting_opts) { 2032 case 0: /* all commands */ 2033 /* count number of commands */ 2034 for (count = 0, oip = opcode_info_arr; 2035 oip->num_attached != 0xff; ++oip) { 2036 if (F_INV_OP & oip->flags) 2037 continue; 2038 count += (oip->num_attached + 1); 2039 } 2040 bump = rctd ? 20 : 8; 2041 put_unaligned_be32(count * bump, arr); 2042 for (offset = 4, oip = opcode_info_arr; 2043 oip->num_attached != 0xff && offset < a_len; ++oip) { 2044 if (F_INV_OP & oip->flags) 2045 continue; 2046 na = oip->num_attached; 2047 arr[offset] = oip->opcode; 2048 put_unaligned_be16(oip->sa, arr + offset + 2); 2049 if (rctd) 2050 arr[offset + 5] |= 0x2; 2051 if (FF_SA & oip->flags) 2052 arr[offset + 5] |= 0x1; 2053 put_unaligned_be16(oip->len_mask[0], arr + offset + 6); 2054 if (rctd) 2055 put_unaligned_be16(0xa, arr + offset + 8); 2056 r_oip = oip; 2057 for (k = 0, oip = oip->arrp; k < na; ++k, ++oip) { 2058 if (F_INV_OP & oip->flags) 2059 continue; 2060 offset += bump; 2061 arr[offset] = oip->opcode; 2062 put_unaligned_be16(oip->sa, arr + offset + 2); 2063 if (rctd) 2064 arr[offset + 5] |= 0x2; 2065 if (FF_SA & oip->flags) 2066 arr[offset + 5] |= 0x1; 2067 put_unaligned_be16(oip->len_mask[0], 2068 arr + offset + 6); 2069 if (rctd) 2070 put_unaligned_be16(0xa, 2071 arr + offset + 8); 2072 } 2073 oip = r_oip; 2074 offset += bump; 2075 } 2076 break; 2077 case 1: /* one command: opcode only */ 2078 case 2: /* one command: opcode plus service action */ 2079 case 3: /* one command: if sa==0 then opcode only else opcode+sa */ 2080 sdeb_i = opcode_ind_arr[req_opcode]; 2081 oip = &opcode_info_arr[sdeb_i]; 2082 if (F_INV_OP & oip->flags) { 2083 supp = 1; 2084 offset = 4; 2085 } else { 2086 if (1 == reporting_opts) { 2087 if (FF_SA & oip->flags) { 2088 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2089 2, 2); 2090 kfree(arr); 2091 return check_condition_result; 2092 } 2093 req_sa = 0; 2094 } else if (2 == reporting_opts && 2095 0 == (FF_SA & oip->flags)) { 2096 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 4, -1); 2097 kfree(arr); /* point at requested sa */ 2098 return check_condition_result; 2099 } 2100 if (0 == (FF_SA & oip->flags) && 2101 req_opcode == oip->opcode) 2102 supp = 3; 2103 else if (0 == (FF_SA & oip->flags)) { 2104 na = oip->num_attached; 2105 for (k = 0, oip = oip->arrp; k < na; 2106 ++k, ++oip) { 2107 if (req_opcode == oip->opcode) 2108 break; 2109 } 2110 supp = (k >= na) ? 1 : 3; 2111 } else if (req_sa != oip->sa) { 2112 na = oip->num_attached; 2113 for (k = 0, oip = oip->arrp; k < na; 2114 ++k, ++oip) { 2115 if (req_sa == oip->sa) 2116 break; 2117 } 2118 supp = (k >= na) ? 1 : 3; 2119 } else 2120 supp = 3; 2121 if (3 == supp) { 2122 u = oip->len_mask[0]; 2123 put_unaligned_be16(u, arr + 2); 2124 arr[4] = oip->opcode; 2125 for (k = 1; k < u; ++k) 2126 arr[4 + k] = (k < 16) ? 2127 oip->len_mask[k] : 0xff; 2128 offset = 4 + u; 2129 } else 2130 offset = 4; 2131 } 2132 arr[1] = (rctd ? 0x80 : 0) | supp; 2133 if (rctd) { 2134 put_unaligned_be16(0xa, arr + offset); 2135 offset += 12; 2136 } 2137 break; 2138 default: 2139 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 2); 2140 kfree(arr); 2141 return check_condition_result; 2142 } 2143 offset = (offset < a_len) ? offset : a_len; 2144 len = (offset < alloc_len) ? offset : alloc_len; 2145 errsts = fill_from_dev_buffer(scp, arr, len); 2146 kfree(arr); 2147 return errsts; 2148 } 2149 2150 static int resp_rsup_tmfs(struct scsi_cmnd *scp, 2151 struct sdebug_dev_info *devip) 2152 { 2153 bool repd; 2154 u32 alloc_len, len; 2155 u8 arr[16]; 2156 u8 *cmd = scp->cmnd; 2157 2158 memset(arr, 0, sizeof(arr)); 2159 repd = !!(cmd[2] & 0x80); 2160 alloc_len = get_unaligned_be32(cmd + 6); 2161 if (alloc_len < 4) { 2162 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 6, -1); 2163 return check_condition_result; 2164 } 2165 arr[0] = 0xc8; /* ATS | ATSS | LURS */ 2166 arr[1] = 0x1; /* ITNRS */ 2167 if (repd) { 2168 arr[3] = 0xc; 2169 len = 16; 2170 } else 2171 len = 4; 2172 2173 len = (len < alloc_len) ? len : alloc_len; 2174 return fill_from_dev_buffer(scp, arr, len); 2175 } 2176 2177 /* <<Following mode page info copied from ST318451LW>> */ 2178 2179 static int resp_err_recov_pg(unsigned char *p, int pcontrol, int target) 2180 { /* Read-Write Error Recovery page for mode_sense */ 2181 unsigned char err_recov_pg[] = {0x1, 0xa, 0xc0, 11, 240, 0, 0, 0, 2182 5, 0, 0xff, 0xff}; 2183 2184 memcpy(p, err_recov_pg, sizeof(err_recov_pg)); 2185 if (1 == pcontrol) 2186 memset(p + 2, 0, sizeof(err_recov_pg) - 2); 2187 return sizeof(err_recov_pg); 2188 } 2189 2190 static int resp_disconnect_pg(unsigned char *p, int pcontrol, int target) 2191 { /* Disconnect-Reconnect page for mode_sense */ 2192 unsigned char disconnect_pg[] = {0x2, 0xe, 128, 128, 0, 10, 0, 0, 2193 0, 0, 0, 0, 0, 0, 0, 0}; 2194 2195 memcpy(p, disconnect_pg, sizeof(disconnect_pg)); 2196 if (1 == pcontrol) 2197 memset(p + 2, 0, sizeof(disconnect_pg) - 2); 2198 return sizeof(disconnect_pg); 2199 } 2200 2201 static int resp_format_pg(unsigned char *p, int pcontrol, int target) 2202 { /* Format device page for mode_sense */ 2203 unsigned char format_pg[] = {0x3, 0x16, 0, 0, 0, 0, 0, 0, 2204 0, 0, 0, 0, 0, 0, 0, 0, 2205 0, 0, 0, 0, 0x40, 0, 0, 0}; 2206 2207 memcpy(p, format_pg, sizeof(format_pg)); 2208 put_unaligned_be16(sdebug_sectors_per, p + 10); 2209 put_unaligned_be16(sdebug_sector_size, p + 12); 2210 if (sdebug_removable) 2211 p[20] |= 0x20; /* should agree with INQUIRY */ 2212 if (1 == pcontrol) 2213 memset(p + 2, 0, sizeof(format_pg) - 2); 2214 return sizeof(format_pg); 2215 } 2216 2217 static unsigned char caching_pg[] = {0x8, 18, 0x14, 0, 0xff, 0xff, 0, 0, 2218 0xff, 0xff, 0xff, 0xff, 0x80, 0x14, 0, 0, 2219 0, 0, 0, 0}; 2220 2221 static int resp_caching_pg(unsigned char *p, int pcontrol, int target) 2222 { /* Caching page for mode_sense */ 2223 unsigned char ch_caching_pg[] = {/* 0x8, 18, */ 0x4, 0, 0, 0, 0, 0, 2224 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}; 2225 unsigned char d_caching_pg[] = {0x8, 18, 0x14, 0, 0xff, 0xff, 0, 0, 2226 0xff, 0xff, 0xff, 0xff, 0x80, 0x14, 0, 0, 0, 0, 0, 0}; 2227 2228 if (SDEBUG_OPT_N_WCE & sdebug_opts) 2229 caching_pg[2] &= ~0x4; /* set WCE=0 (default WCE=1) */ 2230 memcpy(p, caching_pg, sizeof(caching_pg)); 2231 if (1 == pcontrol) 2232 memcpy(p + 2, ch_caching_pg, sizeof(ch_caching_pg)); 2233 else if (2 == pcontrol) 2234 memcpy(p, d_caching_pg, sizeof(d_caching_pg)); 2235 return sizeof(caching_pg); 2236 } 2237 2238 static unsigned char ctrl_m_pg[] = {0xa, 10, 2, 0, 0, 0, 0, 0, 2239 0, 0, 0x2, 0x4b}; 2240 2241 static int resp_ctrl_m_pg(unsigned char *p, int pcontrol, int target) 2242 { /* Control mode page for mode_sense */ 2243 unsigned char ch_ctrl_m_pg[] = {/* 0xa, 10, */ 0x6, 0, 0, 0, 0, 0, 2244 0, 0, 0, 0}; 2245 unsigned char d_ctrl_m_pg[] = {0xa, 10, 2, 0, 0, 0, 0, 0, 2246 0, 0, 0x2, 0x4b}; 2247 2248 if (sdebug_dsense) 2249 ctrl_m_pg[2] |= 0x4; 2250 else 2251 ctrl_m_pg[2] &= ~0x4; 2252 2253 if (sdebug_ato) 2254 ctrl_m_pg[5] |= 0x80; /* ATO=1 */ 2255 2256 memcpy(p, ctrl_m_pg, sizeof(ctrl_m_pg)); 2257 if (1 == pcontrol) 2258 memcpy(p + 2, ch_ctrl_m_pg, sizeof(ch_ctrl_m_pg)); 2259 else if (2 == pcontrol) 2260 memcpy(p, d_ctrl_m_pg, sizeof(d_ctrl_m_pg)); 2261 return sizeof(ctrl_m_pg); 2262 } 2263 2264 2265 static int resp_iec_m_pg(unsigned char *p, int pcontrol, int target) 2266 { /* Informational Exceptions control mode page for mode_sense */ 2267 unsigned char ch_iec_m_pg[] = {/* 0x1c, 0xa, */ 0x4, 0xf, 0, 0, 0, 0, 2268 0, 0, 0x0, 0x0}; 2269 unsigned char d_iec_m_pg[] = {0x1c, 0xa, 0x08, 0, 0, 0, 0, 0, 2270 0, 0, 0x0, 0x0}; 2271 2272 memcpy(p, iec_m_pg, sizeof(iec_m_pg)); 2273 if (1 == pcontrol) 2274 memcpy(p + 2, ch_iec_m_pg, sizeof(ch_iec_m_pg)); 2275 else if (2 == pcontrol) 2276 memcpy(p, d_iec_m_pg, sizeof(d_iec_m_pg)); 2277 return sizeof(iec_m_pg); 2278 } 2279 2280 static int resp_sas_sf_m_pg(unsigned char *p, int pcontrol, int target) 2281 { /* SAS SSP mode page - short format for mode_sense */ 2282 unsigned char sas_sf_m_pg[] = {0x19, 0x6, 2283 0x6, 0x0, 0x7, 0xd0, 0x0, 0x0}; 2284 2285 memcpy(p, sas_sf_m_pg, sizeof(sas_sf_m_pg)); 2286 if (1 == pcontrol) 2287 memset(p + 2, 0, sizeof(sas_sf_m_pg) - 2); 2288 return sizeof(sas_sf_m_pg); 2289 } 2290 2291 2292 static int resp_sas_pcd_m_spg(unsigned char *p, int pcontrol, int target, 2293 int target_dev_id) 2294 { /* SAS phy control and discover mode page for mode_sense */ 2295 unsigned char sas_pcd_m_pg[] = {0x59, 0x1, 0, 0x64, 0, 0x6, 0, 2, 2296 0, 0, 0, 0, 0x10, 0x9, 0x8, 0x0, 2297 0, 0, 0, 0, 0, 0, 0, 0, /* insert SAS addr */ 2298 0, 0, 0, 0, 0, 0, 0, 0, /* insert SAS addr */ 2299 0x2, 0, 0, 0, 0, 0, 0, 0, 2300 0x88, 0x99, 0, 0, 0, 0, 0, 0, 2301 0, 0, 0, 0, 0, 0, 0, 0, 2302 0, 1, 0, 0, 0x10, 0x9, 0x8, 0x0, 2303 0, 0, 0, 0, 0, 0, 0, 0, /* insert SAS addr */ 2304 0, 0, 0, 0, 0, 0, 0, 0, /* insert SAS addr */ 2305 0x3, 0, 0, 0, 0, 0, 0, 0, 2306 0x88, 0x99, 0, 0, 0, 0, 0, 0, 2307 0, 0, 0, 0, 0, 0, 0, 0, 2308 }; 2309 int port_a, port_b; 2310 2311 put_unaligned_be64(naa3_comp_a, sas_pcd_m_pg + 16); 2312 put_unaligned_be64(naa3_comp_c + 1, sas_pcd_m_pg + 24); 2313 put_unaligned_be64(naa3_comp_a, sas_pcd_m_pg + 64); 2314 put_unaligned_be64(naa3_comp_c + 1, sas_pcd_m_pg + 72); 2315 port_a = target_dev_id + 1; 2316 port_b = port_a + 1; 2317 memcpy(p, sas_pcd_m_pg, sizeof(sas_pcd_m_pg)); 2318 put_unaligned_be32(port_a, p + 20); 2319 put_unaligned_be32(port_b, p + 48 + 20); 2320 if (1 == pcontrol) 2321 memset(p + 4, 0, sizeof(sas_pcd_m_pg) - 4); 2322 return sizeof(sas_pcd_m_pg); 2323 } 2324 2325 static int resp_sas_sha_m_spg(unsigned char *p, int pcontrol) 2326 { /* SAS SSP shared protocol specific port mode subpage */ 2327 unsigned char sas_sha_m_pg[] = {0x59, 0x2, 0, 0xc, 0, 0x6, 0x10, 0, 2328 0, 0, 0, 0, 0, 0, 0, 0, 2329 }; 2330 2331 memcpy(p, sas_sha_m_pg, sizeof(sas_sha_m_pg)); 2332 if (1 == pcontrol) 2333 memset(p + 4, 0, sizeof(sas_sha_m_pg) - 4); 2334 return sizeof(sas_sha_m_pg); 2335 } 2336 2337 #define SDEBUG_MAX_MSENSE_SZ 256 2338 2339 static int resp_mode_sense(struct scsi_cmnd *scp, 2340 struct sdebug_dev_info *devip) 2341 { 2342 int pcontrol, pcode, subpcode, bd_len; 2343 unsigned char dev_spec; 2344 u32 alloc_len, offset, len; 2345 int target_dev_id; 2346 int target = scp->device->id; 2347 unsigned char *ap; 2348 unsigned char arr[SDEBUG_MAX_MSENSE_SZ]; 2349 unsigned char *cmd = scp->cmnd; 2350 bool dbd, llbaa, msense_6, is_disk, is_zbc, bad_pcode; 2351 2352 dbd = !!(cmd[1] & 0x8); /* disable block descriptors */ 2353 pcontrol = (cmd[2] & 0xc0) >> 6; 2354 pcode = cmd[2] & 0x3f; 2355 subpcode = cmd[3]; 2356 msense_6 = (MODE_SENSE == cmd[0]); 2357 llbaa = msense_6 ? false : !!(cmd[1] & 0x10); 2358 is_disk = (sdebug_ptype == TYPE_DISK); 2359 is_zbc = (devip->zmodel != BLK_ZONED_NONE); 2360 if ((is_disk || is_zbc) && !dbd) 2361 bd_len = llbaa ? 16 : 8; 2362 else 2363 bd_len = 0; 2364 alloc_len = msense_6 ? cmd[4] : get_unaligned_be16(cmd + 7); 2365 memset(arr, 0, SDEBUG_MAX_MSENSE_SZ); 2366 if (0x3 == pcontrol) { /* Saving values not supported */ 2367 mk_sense_buffer(scp, ILLEGAL_REQUEST, SAVING_PARAMS_UNSUP, 0); 2368 return check_condition_result; 2369 } 2370 target_dev_id = ((devip->sdbg_host->shost->host_no + 1) * 2000) + 2371 (devip->target * 1000) - 3; 2372 /* for disks+zbc set DPOFUA bit and clear write protect (WP) bit */ 2373 if (is_disk || is_zbc) { 2374 dev_spec = 0x10; /* =0x90 if WP=1 implies read-only */ 2375 if (sdebug_wp) 2376 dev_spec |= 0x80; 2377 } else 2378 dev_spec = 0x0; 2379 if (msense_6) { 2380 arr[2] = dev_spec; 2381 arr[3] = bd_len; 2382 offset = 4; 2383 } else { 2384 arr[3] = dev_spec; 2385 if (16 == bd_len) 2386 arr[4] = 0x1; /* set LONGLBA bit */ 2387 arr[7] = bd_len; /* assume 255 or less */ 2388 offset = 8; 2389 } 2390 ap = arr + offset; 2391 if ((bd_len > 0) && (!sdebug_capacity)) 2392 sdebug_capacity = get_sdebug_capacity(); 2393 2394 if (8 == bd_len) { 2395 if (sdebug_capacity > 0xfffffffe) 2396 put_unaligned_be32(0xffffffff, ap + 0); 2397 else 2398 put_unaligned_be32(sdebug_capacity, ap + 0); 2399 put_unaligned_be16(sdebug_sector_size, ap + 6); 2400 offset += bd_len; 2401 ap = arr + offset; 2402 } else if (16 == bd_len) { 2403 put_unaligned_be64((u64)sdebug_capacity, ap + 0); 2404 put_unaligned_be32(sdebug_sector_size, ap + 12); 2405 offset += bd_len; 2406 ap = arr + offset; 2407 } 2408 2409 if ((subpcode > 0x0) && (subpcode < 0xff) && (0x19 != pcode)) { 2410 /* TODO: Control Extension page */ 2411 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1); 2412 return check_condition_result; 2413 } 2414 bad_pcode = false; 2415 2416 switch (pcode) { 2417 case 0x1: /* Read-Write error recovery page, direct access */ 2418 len = resp_err_recov_pg(ap, pcontrol, target); 2419 offset += len; 2420 break; 2421 case 0x2: /* Disconnect-Reconnect page, all devices */ 2422 len = resp_disconnect_pg(ap, pcontrol, target); 2423 offset += len; 2424 break; 2425 case 0x3: /* Format device page, direct access */ 2426 if (is_disk) { 2427 len = resp_format_pg(ap, pcontrol, target); 2428 offset += len; 2429 } else 2430 bad_pcode = true; 2431 break; 2432 case 0x8: /* Caching page, direct access */ 2433 if (is_disk || is_zbc) { 2434 len = resp_caching_pg(ap, pcontrol, target); 2435 offset += len; 2436 } else 2437 bad_pcode = true; 2438 break; 2439 case 0xa: /* Control Mode page, all devices */ 2440 len = resp_ctrl_m_pg(ap, pcontrol, target); 2441 offset += len; 2442 break; 2443 case 0x19: /* if spc==1 then sas phy, control+discover */ 2444 if ((subpcode > 0x2) && (subpcode < 0xff)) { 2445 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1); 2446 return check_condition_result; 2447 } 2448 len = 0; 2449 if ((0x0 == subpcode) || (0xff == subpcode)) 2450 len += resp_sas_sf_m_pg(ap + len, pcontrol, target); 2451 if ((0x1 == subpcode) || (0xff == subpcode)) 2452 len += resp_sas_pcd_m_spg(ap + len, pcontrol, target, 2453 target_dev_id); 2454 if ((0x2 == subpcode) || (0xff == subpcode)) 2455 len += resp_sas_sha_m_spg(ap + len, pcontrol); 2456 offset += len; 2457 break; 2458 case 0x1c: /* Informational Exceptions Mode page, all devices */ 2459 len = resp_iec_m_pg(ap, pcontrol, target); 2460 offset += len; 2461 break; 2462 case 0x3f: /* Read all Mode pages */ 2463 if ((0 == subpcode) || (0xff == subpcode)) { 2464 len = resp_err_recov_pg(ap, pcontrol, target); 2465 len += resp_disconnect_pg(ap + len, pcontrol, target); 2466 if (is_disk) { 2467 len += resp_format_pg(ap + len, pcontrol, 2468 target); 2469 len += resp_caching_pg(ap + len, pcontrol, 2470 target); 2471 } else if (is_zbc) { 2472 len += resp_caching_pg(ap + len, pcontrol, 2473 target); 2474 } 2475 len += resp_ctrl_m_pg(ap + len, pcontrol, target); 2476 len += resp_sas_sf_m_pg(ap + len, pcontrol, target); 2477 if (0xff == subpcode) { 2478 len += resp_sas_pcd_m_spg(ap + len, pcontrol, 2479 target, target_dev_id); 2480 len += resp_sas_sha_m_spg(ap + len, pcontrol); 2481 } 2482 len += resp_iec_m_pg(ap + len, pcontrol, target); 2483 offset += len; 2484 } else { 2485 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1); 2486 return check_condition_result; 2487 } 2488 break; 2489 default: 2490 bad_pcode = true; 2491 break; 2492 } 2493 if (bad_pcode) { 2494 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 5); 2495 return check_condition_result; 2496 } 2497 if (msense_6) 2498 arr[0] = offset - 1; 2499 else 2500 put_unaligned_be16((offset - 2), arr + 0); 2501 return fill_from_dev_buffer(scp, arr, min_t(u32, alloc_len, offset)); 2502 } 2503 2504 #define SDEBUG_MAX_MSELECT_SZ 512 2505 2506 static int resp_mode_select(struct scsi_cmnd *scp, 2507 struct sdebug_dev_info *devip) 2508 { 2509 int pf, sp, ps, md_len, bd_len, off, spf, pg_len; 2510 int param_len, res, mpage; 2511 unsigned char arr[SDEBUG_MAX_MSELECT_SZ]; 2512 unsigned char *cmd = scp->cmnd; 2513 int mselect6 = (MODE_SELECT == cmd[0]); 2514 2515 memset(arr, 0, sizeof(arr)); 2516 pf = cmd[1] & 0x10; 2517 sp = cmd[1] & 0x1; 2518 param_len = mselect6 ? cmd[4] : get_unaligned_be16(cmd + 7); 2519 if ((0 == pf) || sp || (param_len > SDEBUG_MAX_MSELECT_SZ)) { 2520 mk_sense_invalid_fld(scp, SDEB_IN_CDB, mselect6 ? 4 : 7, -1); 2521 return check_condition_result; 2522 } 2523 res = fetch_to_dev_buffer(scp, arr, param_len); 2524 if (-1 == res) 2525 return DID_ERROR << 16; 2526 else if (sdebug_verbose && (res < param_len)) 2527 sdev_printk(KERN_INFO, scp->device, 2528 "%s: cdb indicated=%d, IO sent=%d bytes\n", 2529 __func__, param_len, res); 2530 md_len = mselect6 ? (arr[0] + 1) : (get_unaligned_be16(arr + 0) + 2); 2531 bd_len = mselect6 ? arr[3] : get_unaligned_be16(arr + 6); 2532 off = bd_len + (mselect6 ? 4 : 8); 2533 if (md_len > 2 || off >= res) { 2534 mk_sense_invalid_fld(scp, SDEB_IN_DATA, 0, -1); 2535 return check_condition_result; 2536 } 2537 mpage = arr[off] & 0x3f; 2538 ps = !!(arr[off] & 0x80); 2539 if (ps) { 2540 mk_sense_invalid_fld(scp, SDEB_IN_DATA, off, 7); 2541 return check_condition_result; 2542 } 2543 spf = !!(arr[off] & 0x40); 2544 pg_len = spf ? (get_unaligned_be16(arr + off + 2) + 4) : 2545 (arr[off + 1] + 2); 2546 if ((pg_len + off) > param_len) { 2547 mk_sense_buffer(scp, ILLEGAL_REQUEST, 2548 PARAMETER_LIST_LENGTH_ERR, 0); 2549 return check_condition_result; 2550 } 2551 switch (mpage) { 2552 case 0x8: /* Caching Mode page */ 2553 if (caching_pg[1] == arr[off + 1]) { 2554 memcpy(caching_pg + 2, arr + off + 2, 2555 sizeof(caching_pg) - 2); 2556 goto set_mode_changed_ua; 2557 } 2558 break; 2559 case 0xa: /* Control Mode page */ 2560 if (ctrl_m_pg[1] == arr[off + 1]) { 2561 memcpy(ctrl_m_pg + 2, arr + off + 2, 2562 sizeof(ctrl_m_pg) - 2); 2563 if (ctrl_m_pg[4] & 0x8) 2564 sdebug_wp = true; 2565 else 2566 sdebug_wp = false; 2567 sdebug_dsense = !!(ctrl_m_pg[2] & 0x4); 2568 goto set_mode_changed_ua; 2569 } 2570 break; 2571 case 0x1c: /* Informational Exceptions Mode page */ 2572 if (iec_m_pg[1] == arr[off + 1]) { 2573 memcpy(iec_m_pg + 2, arr + off + 2, 2574 sizeof(iec_m_pg) - 2); 2575 goto set_mode_changed_ua; 2576 } 2577 break; 2578 default: 2579 break; 2580 } 2581 mk_sense_invalid_fld(scp, SDEB_IN_DATA, off, 5); 2582 return check_condition_result; 2583 set_mode_changed_ua: 2584 set_bit(SDEBUG_UA_MODE_CHANGED, devip->uas_bm); 2585 return 0; 2586 } 2587 2588 static int resp_temp_l_pg(unsigned char *arr) 2589 { 2590 unsigned char temp_l_pg[] = {0x0, 0x0, 0x3, 0x2, 0x0, 38, 2591 0x0, 0x1, 0x3, 0x2, 0x0, 65, 2592 }; 2593 2594 memcpy(arr, temp_l_pg, sizeof(temp_l_pg)); 2595 return sizeof(temp_l_pg); 2596 } 2597 2598 static int resp_ie_l_pg(unsigned char *arr) 2599 { 2600 unsigned char ie_l_pg[] = {0x0, 0x0, 0x3, 0x3, 0x0, 0x0, 38, 2601 }; 2602 2603 memcpy(arr, ie_l_pg, sizeof(ie_l_pg)); 2604 if (iec_m_pg[2] & 0x4) { /* TEST bit set */ 2605 arr[4] = THRESHOLD_EXCEEDED; 2606 arr[5] = 0xff; 2607 } 2608 return sizeof(ie_l_pg); 2609 } 2610 2611 static int resp_env_rep_l_spg(unsigned char *arr) 2612 { 2613 unsigned char env_rep_l_spg[] = {0x0, 0x0, 0x23, 0x8, 2614 0x0, 40, 72, 0xff, 45, 18, 0, 0, 2615 0x1, 0x0, 0x23, 0x8, 2616 0x0, 55, 72, 35, 55, 45, 0, 0, 2617 }; 2618 2619 memcpy(arr, env_rep_l_spg, sizeof(env_rep_l_spg)); 2620 return sizeof(env_rep_l_spg); 2621 } 2622 2623 #define SDEBUG_MAX_LSENSE_SZ 512 2624 2625 static int resp_log_sense(struct scsi_cmnd *scp, 2626 struct sdebug_dev_info *devip) 2627 { 2628 int ppc, sp, pcode, subpcode; 2629 u32 alloc_len, len, n; 2630 unsigned char arr[SDEBUG_MAX_LSENSE_SZ]; 2631 unsigned char *cmd = scp->cmnd; 2632 2633 memset(arr, 0, sizeof(arr)); 2634 ppc = cmd[1] & 0x2; 2635 sp = cmd[1] & 0x1; 2636 if (ppc || sp) { 2637 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, ppc ? 1 : 0); 2638 return check_condition_result; 2639 } 2640 pcode = cmd[2] & 0x3f; 2641 subpcode = cmd[3] & 0xff; 2642 alloc_len = get_unaligned_be16(cmd + 7); 2643 arr[0] = pcode; 2644 if (0 == subpcode) { 2645 switch (pcode) { 2646 case 0x0: /* Supported log pages log page */ 2647 n = 4; 2648 arr[n++] = 0x0; /* this page */ 2649 arr[n++] = 0xd; /* Temperature */ 2650 arr[n++] = 0x2f; /* Informational exceptions */ 2651 arr[3] = n - 4; 2652 break; 2653 case 0xd: /* Temperature log page */ 2654 arr[3] = resp_temp_l_pg(arr + 4); 2655 break; 2656 case 0x2f: /* Informational exceptions log page */ 2657 arr[3] = resp_ie_l_pg(arr + 4); 2658 break; 2659 default: 2660 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 5); 2661 return check_condition_result; 2662 } 2663 } else if (0xff == subpcode) { 2664 arr[0] |= 0x40; 2665 arr[1] = subpcode; 2666 switch (pcode) { 2667 case 0x0: /* Supported log pages and subpages log page */ 2668 n = 4; 2669 arr[n++] = 0x0; 2670 arr[n++] = 0x0; /* 0,0 page */ 2671 arr[n++] = 0x0; 2672 arr[n++] = 0xff; /* this page */ 2673 arr[n++] = 0xd; 2674 arr[n++] = 0x0; /* Temperature */ 2675 arr[n++] = 0xd; 2676 arr[n++] = 0x1; /* Environment reporting */ 2677 arr[n++] = 0xd; 2678 arr[n++] = 0xff; /* all 0xd subpages */ 2679 arr[n++] = 0x2f; 2680 arr[n++] = 0x0; /* Informational exceptions */ 2681 arr[n++] = 0x2f; 2682 arr[n++] = 0xff; /* all 0x2f subpages */ 2683 arr[3] = n - 4; 2684 break; 2685 case 0xd: /* Temperature subpages */ 2686 n = 4; 2687 arr[n++] = 0xd; 2688 arr[n++] = 0x0; /* Temperature */ 2689 arr[n++] = 0xd; 2690 arr[n++] = 0x1; /* Environment reporting */ 2691 arr[n++] = 0xd; 2692 arr[n++] = 0xff; /* these subpages */ 2693 arr[3] = n - 4; 2694 break; 2695 case 0x2f: /* Informational exceptions subpages */ 2696 n = 4; 2697 arr[n++] = 0x2f; 2698 arr[n++] = 0x0; /* Informational exceptions */ 2699 arr[n++] = 0x2f; 2700 arr[n++] = 0xff; /* these subpages */ 2701 arr[3] = n - 4; 2702 break; 2703 default: 2704 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 5); 2705 return check_condition_result; 2706 } 2707 } else if (subpcode > 0) { 2708 arr[0] |= 0x40; 2709 arr[1] = subpcode; 2710 if (pcode == 0xd && subpcode == 1) 2711 arr[3] = resp_env_rep_l_spg(arr + 4); 2712 else { 2713 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 5); 2714 return check_condition_result; 2715 } 2716 } else { 2717 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1); 2718 return check_condition_result; 2719 } 2720 len = min_t(u32, get_unaligned_be16(arr + 2) + 4, alloc_len); 2721 return fill_from_dev_buffer(scp, arr, 2722 min_t(u32, len, SDEBUG_MAX_INQ_ARR_SZ)); 2723 } 2724 2725 static inline bool sdebug_dev_is_zoned(struct sdebug_dev_info *devip) 2726 { 2727 return devip->nr_zones != 0; 2728 } 2729 2730 static struct sdeb_zone_state *zbc_zone(struct sdebug_dev_info *devip, 2731 unsigned long long lba) 2732 { 2733 u32 zno = lba >> devip->zsize_shift; 2734 struct sdeb_zone_state *zsp; 2735 2736 if (devip->zcap == devip->zsize || zno < devip->nr_conv_zones) 2737 return &devip->zstate[zno]; 2738 2739 /* 2740 * If the zone capacity is less than the zone size, adjust for gap 2741 * zones. 2742 */ 2743 zno = 2 * zno - devip->nr_conv_zones; 2744 WARN_ONCE(zno >= devip->nr_zones, "%u > %u\n", zno, devip->nr_zones); 2745 zsp = &devip->zstate[zno]; 2746 if (lba >= zsp->z_start + zsp->z_size) 2747 zsp++; 2748 WARN_ON_ONCE(lba >= zsp->z_start + zsp->z_size); 2749 return zsp; 2750 } 2751 2752 static inline bool zbc_zone_is_conv(struct sdeb_zone_state *zsp) 2753 { 2754 return zsp->z_type == ZBC_ZTYPE_CNV; 2755 } 2756 2757 static inline bool zbc_zone_is_gap(struct sdeb_zone_state *zsp) 2758 { 2759 return zsp->z_type == ZBC_ZTYPE_GAP; 2760 } 2761 2762 static inline bool zbc_zone_is_seq(struct sdeb_zone_state *zsp) 2763 { 2764 return !zbc_zone_is_conv(zsp) && !zbc_zone_is_gap(zsp); 2765 } 2766 2767 static void zbc_close_zone(struct sdebug_dev_info *devip, 2768 struct sdeb_zone_state *zsp) 2769 { 2770 enum sdebug_z_cond zc; 2771 2772 if (!zbc_zone_is_seq(zsp)) 2773 return; 2774 2775 zc = zsp->z_cond; 2776 if (!(zc == ZC2_IMPLICIT_OPEN || zc == ZC3_EXPLICIT_OPEN)) 2777 return; 2778 2779 if (zc == ZC2_IMPLICIT_OPEN) 2780 devip->nr_imp_open--; 2781 else 2782 devip->nr_exp_open--; 2783 2784 if (zsp->z_wp == zsp->z_start) { 2785 zsp->z_cond = ZC1_EMPTY; 2786 } else { 2787 zsp->z_cond = ZC4_CLOSED; 2788 devip->nr_closed++; 2789 } 2790 } 2791 2792 static void zbc_close_imp_open_zone(struct sdebug_dev_info *devip) 2793 { 2794 struct sdeb_zone_state *zsp = &devip->zstate[0]; 2795 unsigned int i; 2796 2797 for (i = 0; i < devip->nr_zones; i++, zsp++) { 2798 if (zsp->z_cond == ZC2_IMPLICIT_OPEN) { 2799 zbc_close_zone(devip, zsp); 2800 return; 2801 } 2802 } 2803 } 2804 2805 static void zbc_open_zone(struct sdebug_dev_info *devip, 2806 struct sdeb_zone_state *zsp, bool explicit) 2807 { 2808 enum sdebug_z_cond zc; 2809 2810 if (!zbc_zone_is_seq(zsp)) 2811 return; 2812 2813 zc = zsp->z_cond; 2814 if ((explicit && zc == ZC3_EXPLICIT_OPEN) || 2815 (!explicit && zc == ZC2_IMPLICIT_OPEN)) 2816 return; 2817 2818 /* Close an implicit open zone if necessary */ 2819 if (explicit && zsp->z_cond == ZC2_IMPLICIT_OPEN) 2820 zbc_close_zone(devip, zsp); 2821 else if (devip->max_open && 2822 devip->nr_imp_open + devip->nr_exp_open >= devip->max_open) 2823 zbc_close_imp_open_zone(devip); 2824 2825 if (zsp->z_cond == ZC4_CLOSED) 2826 devip->nr_closed--; 2827 if (explicit) { 2828 zsp->z_cond = ZC3_EXPLICIT_OPEN; 2829 devip->nr_exp_open++; 2830 } else { 2831 zsp->z_cond = ZC2_IMPLICIT_OPEN; 2832 devip->nr_imp_open++; 2833 } 2834 } 2835 2836 static inline void zbc_set_zone_full(struct sdebug_dev_info *devip, 2837 struct sdeb_zone_state *zsp) 2838 { 2839 switch (zsp->z_cond) { 2840 case ZC2_IMPLICIT_OPEN: 2841 devip->nr_imp_open--; 2842 break; 2843 case ZC3_EXPLICIT_OPEN: 2844 devip->nr_exp_open--; 2845 break; 2846 default: 2847 WARN_ONCE(true, "Invalid zone %llu condition %x\n", 2848 zsp->z_start, zsp->z_cond); 2849 break; 2850 } 2851 zsp->z_cond = ZC5_FULL; 2852 } 2853 2854 static void zbc_inc_wp(struct sdebug_dev_info *devip, 2855 unsigned long long lba, unsigned int num) 2856 { 2857 struct sdeb_zone_state *zsp = zbc_zone(devip, lba); 2858 unsigned long long n, end, zend = zsp->z_start + zsp->z_size; 2859 2860 if (!zbc_zone_is_seq(zsp)) 2861 return; 2862 2863 if (zsp->z_type == ZBC_ZTYPE_SWR) { 2864 zsp->z_wp += num; 2865 if (zsp->z_wp >= zend) 2866 zbc_set_zone_full(devip, zsp); 2867 return; 2868 } 2869 2870 while (num) { 2871 if (lba != zsp->z_wp) 2872 zsp->z_non_seq_resource = true; 2873 2874 end = lba + num; 2875 if (end >= zend) { 2876 n = zend - lba; 2877 zsp->z_wp = zend; 2878 } else if (end > zsp->z_wp) { 2879 n = num; 2880 zsp->z_wp = end; 2881 } else { 2882 n = num; 2883 } 2884 if (zsp->z_wp >= zend) 2885 zbc_set_zone_full(devip, zsp); 2886 2887 num -= n; 2888 lba += n; 2889 if (num) { 2890 zsp++; 2891 zend = zsp->z_start + zsp->z_size; 2892 } 2893 } 2894 } 2895 2896 static int check_zbc_access_params(struct scsi_cmnd *scp, 2897 unsigned long long lba, unsigned int num, bool write) 2898 { 2899 struct scsi_device *sdp = scp->device; 2900 struct sdebug_dev_info *devip = (struct sdebug_dev_info *)sdp->hostdata; 2901 struct sdeb_zone_state *zsp = zbc_zone(devip, lba); 2902 struct sdeb_zone_state *zsp_end = zbc_zone(devip, lba + num - 1); 2903 2904 if (!write) { 2905 if (devip->zmodel == BLK_ZONED_HA) 2906 return 0; 2907 /* For host-managed, reads cannot cross zone types boundaries */ 2908 if (zsp->z_type != zsp_end->z_type) { 2909 mk_sense_buffer(scp, ILLEGAL_REQUEST, 2910 LBA_OUT_OF_RANGE, 2911 READ_INVDATA_ASCQ); 2912 return check_condition_result; 2913 } 2914 return 0; 2915 } 2916 2917 /* Writing into a gap zone is not allowed */ 2918 if (zbc_zone_is_gap(zsp)) { 2919 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 2920 ATTEMPT_ACCESS_GAP); 2921 return check_condition_result; 2922 } 2923 2924 /* No restrictions for writes within conventional zones */ 2925 if (zbc_zone_is_conv(zsp)) { 2926 if (!zbc_zone_is_conv(zsp_end)) { 2927 mk_sense_buffer(scp, ILLEGAL_REQUEST, 2928 LBA_OUT_OF_RANGE, 2929 WRITE_BOUNDARY_ASCQ); 2930 return check_condition_result; 2931 } 2932 return 0; 2933 } 2934 2935 if (zsp->z_type == ZBC_ZTYPE_SWR) { 2936 /* Writes cannot cross sequential zone boundaries */ 2937 if (zsp_end != zsp) { 2938 mk_sense_buffer(scp, ILLEGAL_REQUEST, 2939 LBA_OUT_OF_RANGE, 2940 WRITE_BOUNDARY_ASCQ); 2941 return check_condition_result; 2942 } 2943 /* Cannot write full zones */ 2944 if (zsp->z_cond == ZC5_FULL) { 2945 mk_sense_buffer(scp, ILLEGAL_REQUEST, 2946 INVALID_FIELD_IN_CDB, 0); 2947 return check_condition_result; 2948 } 2949 /* Writes must be aligned to the zone WP */ 2950 if (lba != zsp->z_wp) { 2951 mk_sense_buffer(scp, ILLEGAL_REQUEST, 2952 LBA_OUT_OF_RANGE, 2953 UNALIGNED_WRITE_ASCQ); 2954 return check_condition_result; 2955 } 2956 } 2957 2958 /* Handle implicit open of closed and empty zones */ 2959 if (zsp->z_cond == ZC1_EMPTY || zsp->z_cond == ZC4_CLOSED) { 2960 if (devip->max_open && 2961 devip->nr_exp_open >= devip->max_open) { 2962 mk_sense_buffer(scp, DATA_PROTECT, 2963 INSUFF_RES_ASC, 2964 INSUFF_ZONE_ASCQ); 2965 return check_condition_result; 2966 } 2967 zbc_open_zone(devip, zsp, false); 2968 } 2969 2970 return 0; 2971 } 2972 2973 static inline int check_device_access_params 2974 (struct scsi_cmnd *scp, unsigned long long lba, 2975 unsigned int num, bool write) 2976 { 2977 struct scsi_device *sdp = scp->device; 2978 struct sdebug_dev_info *devip = (struct sdebug_dev_info *)sdp->hostdata; 2979 2980 if (lba + num > sdebug_capacity) { 2981 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0); 2982 return check_condition_result; 2983 } 2984 /* transfer length excessive (tie in to block limits VPD page) */ 2985 if (num > sdebug_store_sectors) { 2986 /* needs work to find which cdb byte 'num' comes from */ 2987 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0); 2988 return check_condition_result; 2989 } 2990 if (write && unlikely(sdebug_wp)) { 2991 mk_sense_buffer(scp, DATA_PROTECT, WRITE_PROTECTED, 0x2); 2992 return check_condition_result; 2993 } 2994 if (sdebug_dev_is_zoned(devip)) 2995 return check_zbc_access_params(scp, lba, num, write); 2996 2997 return 0; 2998 } 2999 3000 /* 3001 * Note: if BUG_ON() fires it usually indicates a problem with the parser 3002 * tables. Perhaps a missing F_FAKE_RW or FF_MEDIA_IO flag. Response functions 3003 * that access any of the "stores" in struct sdeb_store_info should call this 3004 * function with bug_if_fake_rw set to true. 3005 */ 3006 static inline struct sdeb_store_info *devip2sip(struct sdebug_dev_info *devip, 3007 bool bug_if_fake_rw) 3008 { 3009 if (sdebug_fake_rw) { 3010 BUG_ON(bug_if_fake_rw); /* See note above */ 3011 return NULL; 3012 } 3013 return xa_load(per_store_ap, devip->sdbg_host->si_idx); 3014 } 3015 3016 /* Returns number of bytes copied or -1 if error. */ 3017 static int do_device_access(struct sdeb_store_info *sip, struct scsi_cmnd *scp, 3018 u32 sg_skip, u64 lba, u32 num, bool do_write) 3019 { 3020 int ret; 3021 u64 block, rest = 0; 3022 enum dma_data_direction dir; 3023 struct scsi_data_buffer *sdb = &scp->sdb; 3024 u8 *fsp; 3025 3026 if (do_write) { 3027 dir = DMA_TO_DEVICE; 3028 write_since_sync = true; 3029 } else { 3030 dir = DMA_FROM_DEVICE; 3031 } 3032 3033 if (!sdb->length || !sip) 3034 return 0; 3035 if (scp->sc_data_direction != dir) 3036 return -1; 3037 fsp = sip->storep; 3038 3039 block = do_div(lba, sdebug_store_sectors); 3040 if (block + num > sdebug_store_sectors) 3041 rest = block + num - sdebug_store_sectors; 3042 3043 ret = sg_copy_buffer(sdb->table.sgl, sdb->table.nents, 3044 fsp + (block * sdebug_sector_size), 3045 (num - rest) * sdebug_sector_size, sg_skip, do_write); 3046 if (ret != (num - rest) * sdebug_sector_size) 3047 return ret; 3048 3049 if (rest) { 3050 ret += sg_copy_buffer(sdb->table.sgl, sdb->table.nents, 3051 fsp, rest * sdebug_sector_size, 3052 sg_skip + ((num - rest) * sdebug_sector_size), 3053 do_write); 3054 } 3055 3056 return ret; 3057 } 3058 3059 /* Returns number of bytes copied or -1 if error. */ 3060 static int do_dout_fetch(struct scsi_cmnd *scp, u32 num, u8 *doutp) 3061 { 3062 struct scsi_data_buffer *sdb = &scp->sdb; 3063 3064 if (!sdb->length) 3065 return 0; 3066 if (scp->sc_data_direction != DMA_TO_DEVICE) 3067 return -1; 3068 return sg_copy_buffer(sdb->table.sgl, sdb->table.nents, doutp, 3069 num * sdebug_sector_size, 0, true); 3070 } 3071 3072 /* If sip->storep+lba compares equal to arr(num), then copy top half of 3073 * arr into sip->storep+lba and return true. If comparison fails then 3074 * return false. */ 3075 static bool comp_write_worker(struct sdeb_store_info *sip, u64 lba, u32 num, 3076 const u8 *arr, bool compare_only) 3077 { 3078 bool res; 3079 u64 block, rest = 0; 3080 u32 store_blks = sdebug_store_sectors; 3081 u32 lb_size = sdebug_sector_size; 3082 u8 *fsp = sip->storep; 3083 3084 block = do_div(lba, store_blks); 3085 if (block + num > store_blks) 3086 rest = block + num - store_blks; 3087 3088 res = !memcmp(fsp + (block * lb_size), arr, (num - rest) * lb_size); 3089 if (!res) 3090 return res; 3091 if (rest) 3092 res = memcmp(fsp, arr + ((num - rest) * lb_size), 3093 rest * lb_size); 3094 if (!res) 3095 return res; 3096 if (compare_only) 3097 return true; 3098 arr += num * lb_size; 3099 memcpy(fsp + (block * lb_size), arr, (num - rest) * lb_size); 3100 if (rest) 3101 memcpy(fsp, arr + ((num - rest) * lb_size), rest * lb_size); 3102 return res; 3103 } 3104 3105 static __be16 dif_compute_csum(const void *buf, int len) 3106 { 3107 __be16 csum; 3108 3109 if (sdebug_guard) 3110 csum = (__force __be16)ip_compute_csum(buf, len); 3111 else 3112 csum = cpu_to_be16(crc_t10dif(buf, len)); 3113 3114 return csum; 3115 } 3116 3117 static int dif_verify(struct t10_pi_tuple *sdt, const void *data, 3118 sector_t sector, u32 ei_lba) 3119 { 3120 __be16 csum = dif_compute_csum(data, sdebug_sector_size); 3121 3122 if (sdt->guard_tag != csum) { 3123 pr_err("GUARD check failed on sector %lu rcvd 0x%04x, data 0x%04x\n", 3124 (unsigned long)sector, 3125 be16_to_cpu(sdt->guard_tag), 3126 be16_to_cpu(csum)); 3127 return 0x01; 3128 } 3129 if (sdebug_dif == T10_PI_TYPE1_PROTECTION && 3130 be32_to_cpu(sdt->ref_tag) != (sector & 0xffffffff)) { 3131 pr_err("REF check failed on sector %lu\n", 3132 (unsigned long)sector); 3133 return 0x03; 3134 } 3135 if (sdebug_dif == T10_PI_TYPE2_PROTECTION && 3136 be32_to_cpu(sdt->ref_tag) != ei_lba) { 3137 pr_err("REF check failed on sector %lu\n", 3138 (unsigned long)sector); 3139 return 0x03; 3140 } 3141 return 0; 3142 } 3143 3144 static void dif_copy_prot(struct scsi_cmnd *scp, sector_t sector, 3145 unsigned int sectors, bool read) 3146 { 3147 size_t resid; 3148 void *paddr; 3149 struct sdeb_store_info *sip = devip2sip((struct sdebug_dev_info *) 3150 scp->device->hostdata, true); 3151 struct t10_pi_tuple *dif_storep = sip->dif_storep; 3152 const void *dif_store_end = dif_storep + sdebug_store_sectors; 3153 struct sg_mapping_iter miter; 3154 3155 /* Bytes of protection data to copy into sgl */ 3156 resid = sectors * sizeof(*dif_storep); 3157 3158 sg_miter_start(&miter, scsi_prot_sglist(scp), 3159 scsi_prot_sg_count(scp), SG_MITER_ATOMIC | 3160 (read ? SG_MITER_TO_SG : SG_MITER_FROM_SG)); 3161 3162 while (sg_miter_next(&miter) && resid > 0) { 3163 size_t len = min_t(size_t, miter.length, resid); 3164 void *start = dif_store(sip, sector); 3165 size_t rest = 0; 3166 3167 if (dif_store_end < start + len) 3168 rest = start + len - dif_store_end; 3169 3170 paddr = miter.addr; 3171 3172 if (read) 3173 memcpy(paddr, start, len - rest); 3174 else 3175 memcpy(start, paddr, len - rest); 3176 3177 if (rest) { 3178 if (read) 3179 memcpy(paddr + len - rest, dif_storep, rest); 3180 else 3181 memcpy(dif_storep, paddr + len - rest, rest); 3182 } 3183 3184 sector += len / sizeof(*dif_storep); 3185 resid -= len; 3186 } 3187 sg_miter_stop(&miter); 3188 } 3189 3190 static int prot_verify_read(struct scsi_cmnd *scp, sector_t start_sec, 3191 unsigned int sectors, u32 ei_lba) 3192 { 3193 int ret = 0; 3194 unsigned int i; 3195 sector_t sector; 3196 struct sdeb_store_info *sip = devip2sip((struct sdebug_dev_info *) 3197 scp->device->hostdata, true); 3198 struct t10_pi_tuple *sdt; 3199 3200 for (i = 0; i < sectors; i++, ei_lba++) { 3201 sector = start_sec + i; 3202 sdt = dif_store(sip, sector); 3203 3204 if (sdt->app_tag == cpu_to_be16(0xffff)) 3205 continue; 3206 3207 /* 3208 * Because scsi_debug acts as both initiator and 3209 * target we proceed to verify the PI even if 3210 * RDPROTECT=3. This is done so the "initiator" knows 3211 * which type of error to return. Otherwise we would 3212 * have to iterate over the PI twice. 3213 */ 3214 if (scp->cmnd[1] >> 5) { /* RDPROTECT */ 3215 ret = dif_verify(sdt, lba2fake_store(sip, sector), 3216 sector, ei_lba); 3217 if (ret) { 3218 dif_errors++; 3219 break; 3220 } 3221 } 3222 } 3223 3224 dif_copy_prot(scp, start_sec, sectors, true); 3225 dix_reads++; 3226 3227 return ret; 3228 } 3229 3230 static inline void 3231 sdeb_read_lock(struct sdeb_store_info *sip) 3232 { 3233 if (sdebug_no_rwlock) { 3234 if (sip) 3235 __acquire(&sip->macc_lck); 3236 else 3237 __acquire(&sdeb_fake_rw_lck); 3238 } else { 3239 if (sip) 3240 read_lock(&sip->macc_lck); 3241 else 3242 read_lock(&sdeb_fake_rw_lck); 3243 } 3244 } 3245 3246 static inline void 3247 sdeb_read_unlock(struct sdeb_store_info *sip) 3248 { 3249 if (sdebug_no_rwlock) { 3250 if (sip) 3251 __release(&sip->macc_lck); 3252 else 3253 __release(&sdeb_fake_rw_lck); 3254 } else { 3255 if (sip) 3256 read_unlock(&sip->macc_lck); 3257 else 3258 read_unlock(&sdeb_fake_rw_lck); 3259 } 3260 } 3261 3262 static inline void 3263 sdeb_write_lock(struct sdeb_store_info *sip) 3264 { 3265 if (sdebug_no_rwlock) { 3266 if (sip) 3267 __acquire(&sip->macc_lck); 3268 else 3269 __acquire(&sdeb_fake_rw_lck); 3270 } else { 3271 if (sip) 3272 write_lock(&sip->macc_lck); 3273 else 3274 write_lock(&sdeb_fake_rw_lck); 3275 } 3276 } 3277 3278 static inline void 3279 sdeb_write_unlock(struct sdeb_store_info *sip) 3280 { 3281 if (sdebug_no_rwlock) { 3282 if (sip) 3283 __release(&sip->macc_lck); 3284 else 3285 __release(&sdeb_fake_rw_lck); 3286 } else { 3287 if (sip) 3288 write_unlock(&sip->macc_lck); 3289 else 3290 write_unlock(&sdeb_fake_rw_lck); 3291 } 3292 } 3293 3294 static int resp_read_dt0(struct scsi_cmnd *scp, struct sdebug_dev_info *devip) 3295 { 3296 bool check_prot; 3297 u32 num; 3298 u32 ei_lba; 3299 int ret; 3300 u64 lba; 3301 struct sdeb_store_info *sip = devip2sip(devip, true); 3302 u8 *cmd = scp->cmnd; 3303 3304 switch (cmd[0]) { 3305 case READ_16: 3306 ei_lba = 0; 3307 lba = get_unaligned_be64(cmd + 2); 3308 num = get_unaligned_be32(cmd + 10); 3309 check_prot = true; 3310 break; 3311 case READ_10: 3312 ei_lba = 0; 3313 lba = get_unaligned_be32(cmd + 2); 3314 num = get_unaligned_be16(cmd + 7); 3315 check_prot = true; 3316 break; 3317 case READ_6: 3318 ei_lba = 0; 3319 lba = (u32)cmd[3] | (u32)cmd[2] << 8 | 3320 (u32)(cmd[1] & 0x1f) << 16; 3321 num = (0 == cmd[4]) ? 256 : cmd[4]; 3322 check_prot = true; 3323 break; 3324 case READ_12: 3325 ei_lba = 0; 3326 lba = get_unaligned_be32(cmd + 2); 3327 num = get_unaligned_be32(cmd + 6); 3328 check_prot = true; 3329 break; 3330 case XDWRITEREAD_10: 3331 ei_lba = 0; 3332 lba = get_unaligned_be32(cmd + 2); 3333 num = get_unaligned_be16(cmd + 7); 3334 check_prot = false; 3335 break; 3336 default: /* assume READ(32) */ 3337 lba = get_unaligned_be64(cmd + 12); 3338 ei_lba = get_unaligned_be32(cmd + 20); 3339 num = get_unaligned_be32(cmd + 28); 3340 check_prot = false; 3341 break; 3342 } 3343 if (unlikely(have_dif_prot && check_prot)) { 3344 if (sdebug_dif == T10_PI_TYPE2_PROTECTION && 3345 (cmd[1] & 0xe0)) { 3346 mk_sense_invalid_opcode(scp); 3347 return check_condition_result; 3348 } 3349 if ((sdebug_dif == T10_PI_TYPE1_PROTECTION || 3350 sdebug_dif == T10_PI_TYPE3_PROTECTION) && 3351 (cmd[1] & 0xe0) == 0) 3352 sdev_printk(KERN_ERR, scp->device, "Unprotected RD " 3353 "to DIF device\n"); 3354 } 3355 if (unlikely((sdebug_opts & SDEBUG_OPT_SHORT_TRANSFER) && 3356 atomic_read(&sdeb_inject_pending))) { 3357 num /= 2; 3358 atomic_set(&sdeb_inject_pending, 0); 3359 } 3360 3361 ret = check_device_access_params(scp, lba, num, false); 3362 if (ret) 3363 return ret; 3364 if (unlikely((SDEBUG_OPT_MEDIUM_ERR & sdebug_opts) && 3365 (lba <= (sdebug_medium_error_start + sdebug_medium_error_count - 1)) && 3366 ((lba + num) > sdebug_medium_error_start))) { 3367 /* claim unrecoverable read error */ 3368 mk_sense_buffer(scp, MEDIUM_ERROR, UNRECOVERED_READ_ERR, 0); 3369 /* set info field and valid bit for fixed descriptor */ 3370 if (0x70 == (scp->sense_buffer[0] & 0x7f)) { 3371 scp->sense_buffer[0] |= 0x80; /* Valid bit */ 3372 ret = (lba < OPT_MEDIUM_ERR_ADDR) 3373 ? OPT_MEDIUM_ERR_ADDR : (int)lba; 3374 put_unaligned_be32(ret, scp->sense_buffer + 3); 3375 } 3376 scsi_set_resid(scp, scsi_bufflen(scp)); 3377 return check_condition_result; 3378 } 3379 3380 sdeb_read_lock(sip); 3381 3382 /* DIX + T10 DIF */ 3383 if (unlikely(sdebug_dix && scsi_prot_sg_count(scp))) { 3384 switch (prot_verify_read(scp, lba, num, ei_lba)) { 3385 case 1: /* Guard tag error */ 3386 if (cmd[1] >> 5 != 3) { /* RDPROTECT != 3 */ 3387 sdeb_read_unlock(sip); 3388 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 1); 3389 return check_condition_result; 3390 } else if (scp->prot_flags & SCSI_PROT_GUARD_CHECK) { 3391 sdeb_read_unlock(sip); 3392 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 1); 3393 return illegal_condition_result; 3394 } 3395 break; 3396 case 3: /* Reference tag error */ 3397 if (cmd[1] >> 5 != 3) { /* RDPROTECT != 3 */ 3398 sdeb_read_unlock(sip); 3399 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 3); 3400 return check_condition_result; 3401 } else if (scp->prot_flags & SCSI_PROT_REF_CHECK) { 3402 sdeb_read_unlock(sip); 3403 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 3); 3404 return illegal_condition_result; 3405 } 3406 break; 3407 } 3408 } 3409 3410 ret = do_device_access(sip, scp, 0, lba, num, false); 3411 sdeb_read_unlock(sip); 3412 if (unlikely(ret == -1)) 3413 return DID_ERROR << 16; 3414 3415 scsi_set_resid(scp, scsi_bufflen(scp) - ret); 3416 3417 if (unlikely((sdebug_opts & SDEBUG_OPT_RECOV_DIF_DIX) && 3418 atomic_read(&sdeb_inject_pending))) { 3419 if (sdebug_opts & SDEBUG_OPT_RECOVERED_ERR) { 3420 mk_sense_buffer(scp, RECOVERED_ERROR, THRESHOLD_EXCEEDED, 0); 3421 atomic_set(&sdeb_inject_pending, 0); 3422 return check_condition_result; 3423 } else if (sdebug_opts & SDEBUG_OPT_DIF_ERR) { 3424 /* Logical block guard check failed */ 3425 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 1); 3426 atomic_set(&sdeb_inject_pending, 0); 3427 return illegal_condition_result; 3428 } else if (SDEBUG_OPT_DIX_ERR & sdebug_opts) { 3429 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 1); 3430 atomic_set(&sdeb_inject_pending, 0); 3431 return illegal_condition_result; 3432 } 3433 } 3434 return 0; 3435 } 3436 3437 static int prot_verify_write(struct scsi_cmnd *SCpnt, sector_t start_sec, 3438 unsigned int sectors, u32 ei_lba) 3439 { 3440 int ret; 3441 struct t10_pi_tuple *sdt; 3442 void *daddr; 3443 sector_t sector = start_sec; 3444 int ppage_offset; 3445 int dpage_offset; 3446 struct sg_mapping_iter diter; 3447 struct sg_mapping_iter piter; 3448 3449 BUG_ON(scsi_sg_count(SCpnt) == 0); 3450 BUG_ON(scsi_prot_sg_count(SCpnt) == 0); 3451 3452 sg_miter_start(&piter, scsi_prot_sglist(SCpnt), 3453 scsi_prot_sg_count(SCpnt), 3454 SG_MITER_ATOMIC | SG_MITER_FROM_SG); 3455 sg_miter_start(&diter, scsi_sglist(SCpnt), scsi_sg_count(SCpnt), 3456 SG_MITER_ATOMIC | SG_MITER_FROM_SG); 3457 3458 /* For each protection page */ 3459 while (sg_miter_next(&piter)) { 3460 dpage_offset = 0; 3461 if (WARN_ON(!sg_miter_next(&diter))) { 3462 ret = 0x01; 3463 goto out; 3464 } 3465 3466 for (ppage_offset = 0; ppage_offset < piter.length; 3467 ppage_offset += sizeof(struct t10_pi_tuple)) { 3468 /* If we're at the end of the current 3469 * data page advance to the next one 3470 */ 3471 if (dpage_offset >= diter.length) { 3472 if (WARN_ON(!sg_miter_next(&diter))) { 3473 ret = 0x01; 3474 goto out; 3475 } 3476 dpage_offset = 0; 3477 } 3478 3479 sdt = piter.addr + ppage_offset; 3480 daddr = diter.addr + dpage_offset; 3481 3482 if (SCpnt->cmnd[1] >> 5 != 3) { /* WRPROTECT */ 3483 ret = dif_verify(sdt, daddr, sector, ei_lba); 3484 if (ret) 3485 goto out; 3486 } 3487 3488 sector++; 3489 ei_lba++; 3490 dpage_offset += sdebug_sector_size; 3491 } 3492 diter.consumed = dpage_offset; 3493 sg_miter_stop(&diter); 3494 } 3495 sg_miter_stop(&piter); 3496 3497 dif_copy_prot(SCpnt, start_sec, sectors, false); 3498 dix_writes++; 3499 3500 return 0; 3501 3502 out: 3503 dif_errors++; 3504 sg_miter_stop(&diter); 3505 sg_miter_stop(&piter); 3506 return ret; 3507 } 3508 3509 static unsigned long lba_to_map_index(sector_t lba) 3510 { 3511 if (sdebug_unmap_alignment) 3512 lba += sdebug_unmap_granularity - sdebug_unmap_alignment; 3513 sector_div(lba, sdebug_unmap_granularity); 3514 return lba; 3515 } 3516 3517 static sector_t map_index_to_lba(unsigned long index) 3518 { 3519 sector_t lba = index * sdebug_unmap_granularity; 3520 3521 if (sdebug_unmap_alignment) 3522 lba -= sdebug_unmap_granularity - sdebug_unmap_alignment; 3523 return lba; 3524 } 3525 3526 static unsigned int map_state(struct sdeb_store_info *sip, sector_t lba, 3527 unsigned int *num) 3528 { 3529 sector_t end; 3530 unsigned int mapped; 3531 unsigned long index; 3532 unsigned long next; 3533 3534 index = lba_to_map_index(lba); 3535 mapped = test_bit(index, sip->map_storep); 3536 3537 if (mapped) 3538 next = find_next_zero_bit(sip->map_storep, map_size, index); 3539 else 3540 next = find_next_bit(sip->map_storep, map_size, index); 3541 3542 end = min_t(sector_t, sdebug_store_sectors, map_index_to_lba(next)); 3543 *num = end - lba; 3544 return mapped; 3545 } 3546 3547 static void map_region(struct sdeb_store_info *sip, sector_t lba, 3548 unsigned int len) 3549 { 3550 sector_t end = lba + len; 3551 3552 while (lba < end) { 3553 unsigned long index = lba_to_map_index(lba); 3554 3555 if (index < map_size) 3556 set_bit(index, sip->map_storep); 3557 3558 lba = map_index_to_lba(index + 1); 3559 } 3560 } 3561 3562 static void unmap_region(struct sdeb_store_info *sip, sector_t lba, 3563 unsigned int len) 3564 { 3565 sector_t end = lba + len; 3566 u8 *fsp = sip->storep; 3567 3568 while (lba < end) { 3569 unsigned long index = lba_to_map_index(lba); 3570 3571 if (lba == map_index_to_lba(index) && 3572 lba + sdebug_unmap_granularity <= end && 3573 index < map_size) { 3574 clear_bit(index, sip->map_storep); 3575 if (sdebug_lbprz) { /* for LBPRZ=2 return 0xff_s */ 3576 memset(fsp + lba * sdebug_sector_size, 3577 (sdebug_lbprz & 1) ? 0 : 0xff, 3578 sdebug_sector_size * 3579 sdebug_unmap_granularity); 3580 } 3581 if (sip->dif_storep) { 3582 memset(sip->dif_storep + lba, 0xff, 3583 sizeof(*sip->dif_storep) * 3584 sdebug_unmap_granularity); 3585 } 3586 } 3587 lba = map_index_to_lba(index + 1); 3588 } 3589 } 3590 3591 static int resp_write_dt0(struct scsi_cmnd *scp, struct sdebug_dev_info *devip) 3592 { 3593 bool check_prot; 3594 u32 num; 3595 u32 ei_lba; 3596 int ret; 3597 u64 lba; 3598 struct sdeb_store_info *sip = devip2sip(devip, true); 3599 u8 *cmd = scp->cmnd; 3600 3601 switch (cmd[0]) { 3602 case WRITE_16: 3603 ei_lba = 0; 3604 lba = get_unaligned_be64(cmd + 2); 3605 num = get_unaligned_be32(cmd + 10); 3606 check_prot = true; 3607 break; 3608 case WRITE_10: 3609 ei_lba = 0; 3610 lba = get_unaligned_be32(cmd + 2); 3611 num = get_unaligned_be16(cmd + 7); 3612 check_prot = true; 3613 break; 3614 case WRITE_6: 3615 ei_lba = 0; 3616 lba = (u32)cmd[3] | (u32)cmd[2] << 8 | 3617 (u32)(cmd[1] & 0x1f) << 16; 3618 num = (0 == cmd[4]) ? 256 : cmd[4]; 3619 check_prot = true; 3620 break; 3621 case WRITE_12: 3622 ei_lba = 0; 3623 lba = get_unaligned_be32(cmd + 2); 3624 num = get_unaligned_be32(cmd + 6); 3625 check_prot = true; 3626 break; 3627 case 0x53: /* XDWRITEREAD(10) */ 3628 ei_lba = 0; 3629 lba = get_unaligned_be32(cmd + 2); 3630 num = get_unaligned_be16(cmd + 7); 3631 check_prot = false; 3632 break; 3633 default: /* assume WRITE(32) */ 3634 lba = get_unaligned_be64(cmd + 12); 3635 ei_lba = get_unaligned_be32(cmd + 20); 3636 num = get_unaligned_be32(cmd + 28); 3637 check_prot = false; 3638 break; 3639 } 3640 if (unlikely(have_dif_prot && check_prot)) { 3641 if (sdebug_dif == T10_PI_TYPE2_PROTECTION && 3642 (cmd[1] & 0xe0)) { 3643 mk_sense_invalid_opcode(scp); 3644 return check_condition_result; 3645 } 3646 if ((sdebug_dif == T10_PI_TYPE1_PROTECTION || 3647 sdebug_dif == T10_PI_TYPE3_PROTECTION) && 3648 (cmd[1] & 0xe0) == 0) 3649 sdev_printk(KERN_ERR, scp->device, "Unprotected WR " 3650 "to DIF device\n"); 3651 } 3652 3653 sdeb_write_lock(sip); 3654 ret = check_device_access_params(scp, lba, num, true); 3655 if (ret) { 3656 sdeb_write_unlock(sip); 3657 return ret; 3658 } 3659 3660 /* DIX + T10 DIF */ 3661 if (unlikely(sdebug_dix && scsi_prot_sg_count(scp))) { 3662 switch (prot_verify_write(scp, lba, num, ei_lba)) { 3663 case 1: /* Guard tag error */ 3664 if (scp->prot_flags & SCSI_PROT_GUARD_CHECK) { 3665 sdeb_write_unlock(sip); 3666 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 1); 3667 return illegal_condition_result; 3668 } else if (scp->cmnd[1] >> 5 != 3) { /* WRPROTECT != 3 */ 3669 sdeb_write_unlock(sip); 3670 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 1); 3671 return check_condition_result; 3672 } 3673 break; 3674 case 3: /* Reference tag error */ 3675 if (scp->prot_flags & SCSI_PROT_REF_CHECK) { 3676 sdeb_write_unlock(sip); 3677 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 3); 3678 return illegal_condition_result; 3679 } else if (scp->cmnd[1] >> 5 != 3) { /* WRPROTECT != 3 */ 3680 sdeb_write_unlock(sip); 3681 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 3); 3682 return check_condition_result; 3683 } 3684 break; 3685 } 3686 } 3687 3688 ret = do_device_access(sip, scp, 0, lba, num, true); 3689 if (unlikely(scsi_debug_lbp())) 3690 map_region(sip, lba, num); 3691 /* If ZBC zone then bump its write pointer */ 3692 if (sdebug_dev_is_zoned(devip)) 3693 zbc_inc_wp(devip, lba, num); 3694 sdeb_write_unlock(sip); 3695 if (unlikely(-1 == ret)) 3696 return DID_ERROR << 16; 3697 else if (unlikely(sdebug_verbose && 3698 (ret < (num * sdebug_sector_size)))) 3699 sdev_printk(KERN_INFO, scp->device, 3700 "%s: write: cdb indicated=%u, IO sent=%d bytes\n", 3701 my_name, num * sdebug_sector_size, ret); 3702 3703 if (unlikely((sdebug_opts & SDEBUG_OPT_RECOV_DIF_DIX) && 3704 atomic_read(&sdeb_inject_pending))) { 3705 if (sdebug_opts & SDEBUG_OPT_RECOVERED_ERR) { 3706 mk_sense_buffer(scp, RECOVERED_ERROR, THRESHOLD_EXCEEDED, 0); 3707 atomic_set(&sdeb_inject_pending, 0); 3708 return check_condition_result; 3709 } else if (sdebug_opts & SDEBUG_OPT_DIF_ERR) { 3710 /* Logical block guard check failed */ 3711 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 1); 3712 atomic_set(&sdeb_inject_pending, 0); 3713 return illegal_condition_result; 3714 } else if (sdebug_opts & SDEBUG_OPT_DIX_ERR) { 3715 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 1); 3716 atomic_set(&sdeb_inject_pending, 0); 3717 return illegal_condition_result; 3718 } 3719 } 3720 return 0; 3721 } 3722 3723 /* 3724 * T10 has only specified WRITE SCATTERED(16) and WRITE SCATTERED(32). 3725 * No READ GATHERED yet (requires bidi or long cdb holding gather list). 3726 */ 3727 static int resp_write_scat(struct scsi_cmnd *scp, 3728 struct sdebug_dev_info *devip) 3729 { 3730 u8 *cmd = scp->cmnd; 3731 u8 *lrdp = NULL; 3732 u8 *up; 3733 struct sdeb_store_info *sip = devip2sip(devip, true); 3734 u8 wrprotect; 3735 u16 lbdof, num_lrd, k; 3736 u32 num, num_by, bt_len, lbdof_blen, sg_off, cum_lb; 3737 u32 lb_size = sdebug_sector_size; 3738 u32 ei_lba; 3739 u64 lba; 3740 int ret, res; 3741 bool is_16; 3742 static const u32 lrd_size = 32; /* + parameter list header size */ 3743 3744 if (cmd[0] == VARIABLE_LENGTH_CMD) { 3745 is_16 = false; 3746 wrprotect = (cmd[10] >> 5) & 0x7; 3747 lbdof = get_unaligned_be16(cmd + 12); 3748 num_lrd = get_unaligned_be16(cmd + 16); 3749 bt_len = get_unaligned_be32(cmd + 28); 3750 } else { /* that leaves WRITE SCATTERED(16) */ 3751 is_16 = true; 3752 wrprotect = (cmd[2] >> 5) & 0x7; 3753 lbdof = get_unaligned_be16(cmd + 4); 3754 num_lrd = get_unaligned_be16(cmd + 8); 3755 bt_len = get_unaligned_be32(cmd + 10); 3756 if (unlikely(have_dif_prot)) { 3757 if (sdebug_dif == T10_PI_TYPE2_PROTECTION && 3758 wrprotect) { 3759 mk_sense_invalid_opcode(scp); 3760 return illegal_condition_result; 3761 } 3762 if ((sdebug_dif == T10_PI_TYPE1_PROTECTION || 3763 sdebug_dif == T10_PI_TYPE3_PROTECTION) && 3764 wrprotect == 0) 3765 sdev_printk(KERN_ERR, scp->device, 3766 "Unprotected WR to DIF device\n"); 3767 } 3768 } 3769 if ((num_lrd == 0) || (bt_len == 0)) 3770 return 0; /* T10 says these do-nothings are not errors */ 3771 if (lbdof == 0) { 3772 if (sdebug_verbose) 3773 sdev_printk(KERN_INFO, scp->device, 3774 "%s: %s: LB Data Offset field bad\n", 3775 my_name, __func__); 3776 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0); 3777 return illegal_condition_result; 3778 } 3779 lbdof_blen = lbdof * lb_size; 3780 if ((lrd_size + (num_lrd * lrd_size)) > lbdof_blen) { 3781 if (sdebug_verbose) 3782 sdev_printk(KERN_INFO, scp->device, 3783 "%s: %s: LBA range descriptors don't fit\n", 3784 my_name, __func__); 3785 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0); 3786 return illegal_condition_result; 3787 } 3788 lrdp = kzalloc(lbdof_blen, GFP_ATOMIC); 3789 if (lrdp == NULL) 3790 return SCSI_MLQUEUE_HOST_BUSY; 3791 if (sdebug_verbose) 3792 sdev_printk(KERN_INFO, scp->device, 3793 "%s: %s: Fetch header+scatter_list, lbdof_blen=%u\n", 3794 my_name, __func__, lbdof_blen); 3795 res = fetch_to_dev_buffer(scp, lrdp, lbdof_blen); 3796 if (res == -1) { 3797 ret = DID_ERROR << 16; 3798 goto err_out; 3799 } 3800 3801 sdeb_write_lock(sip); 3802 sg_off = lbdof_blen; 3803 /* Spec says Buffer xfer Length field in number of LBs in dout */ 3804 cum_lb = 0; 3805 for (k = 0, up = lrdp + lrd_size; k < num_lrd; ++k, up += lrd_size) { 3806 lba = get_unaligned_be64(up + 0); 3807 num = get_unaligned_be32(up + 8); 3808 if (sdebug_verbose) 3809 sdev_printk(KERN_INFO, scp->device, 3810 "%s: %s: k=%d LBA=0x%llx num=%u sg_off=%u\n", 3811 my_name, __func__, k, lba, num, sg_off); 3812 if (num == 0) 3813 continue; 3814 ret = check_device_access_params(scp, lba, num, true); 3815 if (ret) 3816 goto err_out_unlock; 3817 num_by = num * lb_size; 3818 ei_lba = is_16 ? 0 : get_unaligned_be32(up + 12); 3819 3820 if ((cum_lb + num) > bt_len) { 3821 if (sdebug_verbose) 3822 sdev_printk(KERN_INFO, scp->device, 3823 "%s: %s: sum of blocks > data provided\n", 3824 my_name, __func__); 3825 mk_sense_buffer(scp, ILLEGAL_REQUEST, WRITE_ERROR_ASC, 3826 0); 3827 ret = illegal_condition_result; 3828 goto err_out_unlock; 3829 } 3830 3831 /* DIX + T10 DIF */ 3832 if (unlikely(sdebug_dix && scsi_prot_sg_count(scp))) { 3833 int prot_ret = prot_verify_write(scp, lba, num, 3834 ei_lba); 3835 3836 if (prot_ret) { 3837 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 3838 prot_ret); 3839 ret = illegal_condition_result; 3840 goto err_out_unlock; 3841 } 3842 } 3843 3844 ret = do_device_access(sip, scp, sg_off, lba, num, true); 3845 /* If ZBC zone then bump its write pointer */ 3846 if (sdebug_dev_is_zoned(devip)) 3847 zbc_inc_wp(devip, lba, num); 3848 if (unlikely(scsi_debug_lbp())) 3849 map_region(sip, lba, num); 3850 if (unlikely(-1 == ret)) { 3851 ret = DID_ERROR << 16; 3852 goto err_out_unlock; 3853 } else if (unlikely(sdebug_verbose && (ret < num_by))) 3854 sdev_printk(KERN_INFO, scp->device, 3855 "%s: write: cdb indicated=%u, IO sent=%d bytes\n", 3856 my_name, num_by, ret); 3857 3858 if (unlikely((sdebug_opts & SDEBUG_OPT_RECOV_DIF_DIX) && 3859 atomic_read(&sdeb_inject_pending))) { 3860 if (sdebug_opts & SDEBUG_OPT_RECOVERED_ERR) { 3861 mk_sense_buffer(scp, RECOVERED_ERROR, THRESHOLD_EXCEEDED, 0); 3862 atomic_set(&sdeb_inject_pending, 0); 3863 ret = check_condition_result; 3864 goto err_out_unlock; 3865 } else if (sdebug_opts & SDEBUG_OPT_DIF_ERR) { 3866 /* Logical block guard check failed */ 3867 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 1); 3868 atomic_set(&sdeb_inject_pending, 0); 3869 ret = illegal_condition_result; 3870 goto err_out_unlock; 3871 } else if (sdebug_opts & SDEBUG_OPT_DIX_ERR) { 3872 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 1); 3873 atomic_set(&sdeb_inject_pending, 0); 3874 ret = illegal_condition_result; 3875 goto err_out_unlock; 3876 } 3877 } 3878 sg_off += num_by; 3879 cum_lb += num; 3880 } 3881 ret = 0; 3882 err_out_unlock: 3883 sdeb_write_unlock(sip); 3884 err_out: 3885 kfree(lrdp); 3886 return ret; 3887 } 3888 3889 static int resp_write_same(struct scsi_cmnd *scp, u64 lba, u32 num, 3890 u32 ei_lba, bool unmap, bool ndob) 3891 { 3892 struct scsi_device *sdp = scp->device; 3893 struct sdebug_dev_info *devip = (struct sdebug_dev_info *)sdp->hostdata; 3894 unsigned long long i; 3895 u64 block, lbaa; 3896 u32 lb_size = sdebug_sector_size; 3897 int ret; 3898 struct sdeb_store_info *sip = devip2sip((struct sdebug_dev_info *) 3899 scp->device->hostdata, true); 3900 u8 *fs1p; 3901 u8 *fsp; 3902 3903 sdeb_write_lock(sip); 3904 3905 ret = check_device_access_params(scp, lba, num, true); 3906 if (ret) { 3907 sdeb_write_unlock(sip); 3908 return ret; 3909 } 3910 3911 if (unmap && scsi_debug_lbp()) { 3912 unmap_region(sip, lba, num); 3913 goto out; 3914 } 3915 lbaa = lba; 3916 block = do_div(lbaa, sdebug_store_sectors); 3917 /* if ndob then zero 1 logical block, else fetch 1 logical block */ 3918 fsp = sip->storep; 3919 fs1p = fsp + (block * lb_size); 3920 if (ndob) { 3921 memset(fs1p, 0, lb_size); 3922 ret = 0; 3923 } else 3924 ret = fetch_to_dev_buffer(scp, fs1p, lb_size); 3925 3926 if (-1 == ret) { 3927 sdeb_write_unlock(sip); 3928 return DID_ERROR << 16; 3929 } else if (sdebug_verbose && !ndob && (ret < lb_size)) 3930 sdev_printk(KERN_INFO, scp->device, 3931 "%s: %s: lb size=%u, IO sent=%d bytes\n", 3932 my_name, "write same", lb_size, ret); 3933 3934 /* Copy first sector to remaining blocks */ 3935 for (i = 1 ; i < num ; i++) { 3936 lbaa = lba + i; 3937 block = do_div(lbaa, sdebug_store_sectors); 3938 memmove(fsp + (block * lb_size), fs1p, lb_size); 3939 } 3940 if (scsi_debug_lbp()) 3941 map_region(sip, lba, num); 3942 /* If ZBC zone then bump its write pointer */ 3943 if (sdebug_dev_is_zoned(devip)) 3944 zbc_inc_wp(devip, lba, num); 3945 out: 3946 sdeb_write_unlock(sip); 3947 3948 return 0; 3949 } 3950 3951 static int resp_write_same_10(struct scsi_cmnd *scp, 3952 struct sdebug_dev_info *devip) 3953 { 3954 u8 *cmd = scp->cmnd; 3955 u32 lba; 3956 u16 num; 3957 u32 ei_lba = 0; 3958 bool unmap = false; 3959 3960 if (cmd[1] & 0x8) { 3961 if (sdebug_lbpws10 == 0) { 3962 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 3); 3963 return check_condition_result; 3964 } else 3965 unmap = true; 3966 } 3967 lba = get_unaligned_be32(cmd + 2); 3968 num = get_unaligned_be16(cmd + 7); 3969 if (num > sdebug_write_same_length) { 3970 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 7, -1); 3971 return check_condition_result; 3972 } 3973 return resp_write_same(scp, lba, num, ei_lba, unmap, false); 3974 } 3975 3976 static int resp_write_same_16(struct scsi_cmnd *scp, 3977 struct sdebug_dev_info *devip) 3978 { 3979 u8 *cmd = scp->cmnd; 3980 u64 lba; 3981 u32 num; 3982 u32 ei_lba = 0; 3983 bool unmap = false; 3984 bool ndob = false; 3985 3986 if (cmd[1] & 0x8) { /* UNMAP */ 3987 if (sdebug_lbpws == 0) { 3988 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 3); 3989 return check_condition_result; 3990 } else 3991 unmap = true; 3992 } 3993 if (cmd[1] & 0x1) /* NDOB (no data-out buffer, assumes zeroes) */ 3994 ndob = true; 3995 lba = get_unaligned_be64(cmd + 2); 3996 num = get_unaligned_be32(cmd + 10); 3997 if (num > sdebug_write_same_length) { 3998 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 10, -1); 3999 return check_condition_result; 4000 } 4001 return resp_write_same(scp, lba, num, ei_lba, unmap, ndob); 4002 } 4003 4004 /* Note the mode field is in the same position as the (lower) service action 4005 * field. For the Report supported operation codes command, SPC-4 suggests 4006 * each mode of this command should be reported separately; for future. */ 4007 static int resp_write_buffer(struct scsi_cmnd *scp, 4008 struct sdebug_dev_info *devip) 4009 { 4010 u8 *cmd = scp->cmnd; 4011 struct scsi_device *sdp = scp->device; 4012 struct sdebug_dev_info *dp; 4013 u8 mode; 4014 4015 mode = cmd[1] & 0x1f; 4016 switch (mode) { 4017 case 0x4: /* download microcode (MC) and activate (ACT) */ 4018 /* set UAs on this device only */ 4019 set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm); 4020 set_bit(SDEBUG_UA_MICROCODE_CHANGED, devip->uas_bm); 4021 break; 4022 case 0x5: /* download MC, save and ACT */ 4023 set_bit(SDEBUG_UA_MICROCODE_CHANGED_WO_RESET, devip->uas_bm); 4024 break; 4025 case 0x6: /* download MC with offsets and ACT */ 4026 /* set UAs on most devices (LUs) in this target */ 4027 list_for_each_entry(dp, 4028 &devip->sdbg_host->dev_info_list, 4029 dev_list) 4030 if (dp->target == sdp->id) { 4031 set_bit(SDEBUG_UA_BUS_RESET, dp->uas_bm); 4032 if (devip != dp) 4033 set_bit(SDEBUG_UA_MICROCODE_CHANGED, 4034 dp->uas_bm); 4035 } 4036 break; 4037 case 0x7: /* download MC with offsets, save, and ACT */ 4038 /* set UA on all devices (LUs) in this target */ 4039 list_for_each_entry(dp, 4040 &devip->sdbg_host->dev_info_list, 4041 dev_list) 4042 if (dp->target == sdp->id) 4043 set_bit(SDEBUG_UA_MICROCODE_CHANGED_WO_RESET, 4044 dp->uas_bm); 4045 break; 4046 default: 4047 /* do nothing for this command for other mode values */ 4048 break; 4049 } 4050 return 0; 4051 } 4052 4053 static int resp_comp_write(struct scsi_cmnd *scp, 4054 struct sdebug_dev_info *devip) 4055 { 4056 u8 *cmd = scp->cmnd; 4057 u8 *arr; 4058 struct sdeb_store_info *sip = devip2sip(devip, true); 4059 u64 lba; 4060 u32 dnum; 4061 u32 lb_size = sdebug_sector_size; 4062 u8 num; 4063 int ret; 4064 int retval = 0; 4065 4066 lba = get_unaligned_be64(cmd + 2); 4067 num = cmd[13]; /* 1 to a maximum of 255 logical blocks */ 4068 if (0 == num) 4069 return 0; /* degenerate case, not an error */ 4070 if (sdebug_dif == T10_PI_TYPE2_PROTECTION && 4071 (cmd[1] & 0xe0)) { 4072 mk_sense_invalid_opcode(scp); 4073 return check_condition_result; 4074 } 4075 if ((sdebug_dif == T10_PI_TYPE1_PROTECTION || 4076 sdebug_dif == T10_PI_TYPE3_PROTECTION) && 4077 (cmd[1] & 0xe0) == 0) 4078 sdev_printk(KERN_ERR, scp->device, "Unprotected WR " 4079 "to DIF device\n"); 4080 ret = check_device_access_params(scp, lba, num, false); 4081 if (ret) 4082 return ret; 4083 dnum = 2 * num; 4084 arr = kcalloc(lb_size, dnum, GFP_ATOMIC); 4085 if (NULL == arr) { 4086 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC, 4087 INSUFF_RES_ASCQ); 4088 return check_condition_result; 4089 } 4090 4091 sdeb_write_lock(sip); 4092 4093 ret = do_dout_fetch(scp, dnum, arr); 4094 if (ret == -1) { 4095 retval = DID_ERROR << 16; 4096 goto cleanup; 4097 } else if (sdebug_verbose && (ret < (dnum * lb_size))) 4098 sdev_printk(KERN_INFO, scp->device, "%s: compare_write: cdb " 4099 "indicated=%u, IO sent=%d bytes\n", my_name, 4100 dnum * lb_size, ret); 4101 if (!comp_write_worker(sip, lba, num, arr, false)) { 4102 mk_sense_buffer(scp, MISCOMPARE, MISCOMPARE_VERIFY_ASC, 0); 4103 retval = check_condition_result; 4104 goto cleanup; 4105 } 4106 if (scsi_debug_lbp()) 4107 map_region(sip, lba, num); 4108 cleanup: 4109 sdeb_write_unlock(sip); 4110 kfree(arr); 4111 return retval; 4112 } 4113 4114 struct unmap_block_desc { 4115 __be64 lba; 4116 __be32 blocks; 4117 __be32 __reserved; 4118 }; 4119 4120 static int resp_unmap(struct scsi_cmnd *scp, struct sdebug_dev_info *devip) 4121 { 4122 unsigned char *buf; 4123 struct unmap_block_desc *desc; 4124 struct sdeb_store_info *sip = devip2sip(devip, true); 4125 unsigned int i, payload_len, descriptors; 4126 int ret; 4127 4128 if (!scsi_debug_lbp()) 4129 return 0; /* fib and say its done */ 4130 payload_len = get_unaligned_be16(scp->cmnd + 7); 4131 BUG_ON(scsi_bufflen(scp) != payload_len); 4132 4133 descriptors = (payload_len - 8) / 16; 4134 if (descriptors > sdebug_unmap_max_desc) { 4135 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 7, -1); 4136 return check_condition_result; 4137 } 4138 4139 buf = kzalloc(scsi_bufflen(scp), GFP_ATOMIC); 4140 if (!buf) { 4141 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC, 4142 INSUFF_RES_ASCQ); 4143 return check_condition_result; 4144 } 4145 4146 scsi_sg_copy_to_buffer(scp, buf, scsi_bufflen(scp)); 4147 4148 BUG_ON(get_unaligned_be16(&buf[0]) != payload_len - 2); 4149 BUG_ON(get_unaligned_be16(&buf[2]) != descriptors * 16); 4150 4151 desc = (void *)&buf[8]; 4152 4153 sdeb_write_lock(sip); 4154 4155 for (i = 0 ; i < descriptors ; i++) { 4156 unsigned long long lba = get_unaligned_be64(&desc[i].lba); 4157 unsigned int num = get_unaligned_be32(&desc[i].blocks); 4158 4159 ret = check_device_access_params(scp, lba, num, true); 4160 if (ret) 4161 goto out; 4162 4163 unmap_region(sip, lba, num); 4164 } 4165 4166 ret = 0; 4167 4168 out: 4169 sdeb_write_unlock(sip); 4170 kfree(buf); 4171 4172 return ret; 4173 } 4174 4175 #define SDEBUG_GET_LBA_STATUS_LEN 32 4176 4177 static int resp_get_lba_status(struct scsi_cmnd *scp, 4178 struct sdebug_dev_info *devip) 4179 { 4180 u8 *cmd = scp->cmnd; 4181 u64 lba; 4182 u32 alloc_len, mapped, num; 4183 int ret; 4184 u8 arr[SDEBUG_GET_LBA_STATUS_LEN]; 4185 4186 lba = get_unaligned_be64(cmd + 2); 4187 alloc_len = get_unaligned_be32(cmd + 10); 4188 4189 if (alloc_len < 24) 4190 return 0; 4191 4192 ret = check_device_access_params(scp, lba, 1, false); 4193 if (ret) 4194 return ret; 4195 4196 if (scsi_debug_lbp()) { 4197 struct sdeb_store_info *sip = devip2sip(devip, true); 4198 4199 mapped = map_state(sip, lba, &num); 4200 } else { 4201 mapped = 1; 4202 /* following just in case virtual_gb changed */ 4203 sdebug_capacity = get_sdebug_capacity(); 4204 if (sdebug_capacity - lba <= 0xffffffff) 4205 num = sdebug_capacity - lba; 4206 else 4207 num = 0xffffffff; 4208 } 4209 4210 memset(arr, 0, SDEBUG_GET_LBA_STATUS_LEN); 4211 put_unaligned_be32(20, arr); /* Parameter Data Length */ 4212 put_unaligned_be64(lba, arr + 8); /* LBA */ 4213 put_unaligned_be32(num, arr + 16); /* Number of blocks */ 4214 arr[20] = !mapped; /* prov_stat=0: mapped; 1: dealloc */ 4215 4216 return fill_from_dev_buffer(scp, arr, SDEBUG_GET_LBA_STATUS_LEN); 4217 } 4218 4219 static int resp_sync_cache(struct scsi_cmnd *scp, 4220 struct sdebug_dev_info *devip) 4221 { 4222 int res = 0; 4223 u64 lba; 4224 u32 num_blocks; 4225 u8 *cmd = scp->cmnd; 4226 4227 if (cmd[0] == SYNCHRONIZE_CACHE) { /* 10 byte cdb */ 4228 lba = get_unaligned_be32(cmd + 2); 4229 num_blocks = get_unaligned_be16(cmd + 7); 4230 } else { /* SYNCHRONIZE_CACHE(16) */ 4231 lba = get_unaligned_be64(cmd + 2); 4232 num_blocks = get_unaligned_be32(cmd + 10); 4233 } 4234 if (lba + num_blocks > sdebug_capacity) { 4235 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0); 4236 return check_condition_result; 4237 } 4238 if (!write_since_sync || (cmd[1] & 0x2)) 4239 res = SDEG_RES_IMMED_MASK; 4240 else /* delay if write_since_sync and IMMED clear */ 4241 write_since_sync = false; 4242 return res; 4243 } 4244 4245 /* 4246 * Assuming the LBA+num_blocks is not out-of-range, this function will return 4247 * CONDITION MET if the specified blocks will/have fitted in the cache, and 4248 * a GOOD status otherwise. Model a disk with a big cache and yield 4249 * CONDITION MET. Actually tries to bring range in main memory into the 4250 * cache associated with the CPU(s). 4251 */ 4252 static int resp_pre_fetch(struct scsi_cmnd *scp, 4253 struct sdebug_dev_info *devip) 4254 { 4255 int res = 0; 4256 u64 lba; 4257 u64 block, rest = 0; 4258 u32 nblks; 4259 u8 *cmd = scp->cmnd; 4260 struct sdeb_store_info *sip = devip2sip(devip, true); 4261 u8 *fsp = sip->storep; 4262 4263 if (cmd[0] == PRE_FETCH) { /* 10 byte cdb */ 4264 lba = get_unaligned_be32(cmd + 2); 4265 nblks = get_unaligned_be16(cmd + 7); 4266 } else { /* PRE-FETCH(16) */ 4267 lba = get_unaligned_be64(cmd + 2); 4268 nblks = get_unaligned_be32(cmd + 10); 4269 } 4270 if (lba + nblks > sdebug_capacity) { 4271 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0); 4272 return check_condition_result; 4273 } 4274 if (!fsp) 4275 goto fini; 4276 /* PRE-FETCH spec says nothing about LBP or PI so skip them */ 4277 block = do_div(lba, sdebug_store_sectors); 4278 if (block + nblks > sdebug_store_sectors) 4279 rest = block + nblks - sdebug_store_sectors; 4280 4281 /* Try to bring the PRE-FETCH range into CPU's cache */ 4282 sdeb_read_lock(sip); 4283 prefetch_range(fsp + (sdebug_sector_size * block), 4284 (nblks - rest) * sdebug_sector_size); 4285 if (rest) 4286 prefetch_range(fsp, rest * sdebug_sector_size); 4287 sdeb_read_unlock(sip); 4288 fini: 4289 if (cmd[1] & 0x2) 4290 res = SDEG_RES_IMMED_MASK; 4291 return res | condition_met_result; 4292 } 4293 4294 #define RL_BUCKET_ELEMS 8 4295 4296 /* Even though each pseudo target has a REPORT LUNS "well known logical unit" 4297 * (W-LUN), the normal Linux scanning logic does not associate it with a 4298 * device (e.g. /dev/sg7). The following magic will make that association: 4299 * "cd /sys/class/scsi_host/host<n> ; echo '- - 49409' > scan" 4300 * where <n> is a host number. If there are multiple targets in a host then 4301 * the above will associate a W-LUN to each target. To only get a W-LUN 4302 * for target 2, then use "echo '- 2 49409' > scan" . 4303 */ 4304 static int resp_report_luns(struct scsi_cmnd *scp, 4305 struct sdebug_dev_info *devip) 4306 { 4307 unsigned char *cmd = scp->cmnd; 4308 unsigned int alloc_len; 4309 unsigned char select_report; 4310 u64 lun; 4311 struct scsi_lun *lun_p; 4312 u8 arr[RL_BUCKET_ELEMS * sizeof(struct scsi_lun)]; 4313 unsigned int lun_cnt; /* normal LUN count (max: 256) */ 4314 unsigned int wlun_cnt; /* report luns W-LUN count */ 4315 unsigned int tlun_cnt; /* total LUN count */ 4316 unsigned int rlen; /* response length (in bytes) */ 4317 int k, j, n, res; 4318 unsigned int off_rsp = 0; 4319 const int sz_lun = sizeof(struct scsi_lun); 4320 4321 clear_luns_changed_on_target(devip); 4322 4323 select_report = cmd[2]; 4324 alloc_len = get_unaligned_be32(cmd + 6); 4325 4326 if (alloc_len < 4) { 4327 pr_err("alloc len too small %d\n", alloc_len); 4328 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 6, -1); 4329 return check_condition_result; 4330 } 4331 4332 switch (select_report) { 4333 case 0: /* all LUNs apart from W-LUNs */ 4334 lun_cnt = sdebug_max_luns; 4335 wlun_cnt = 0; 4336 break; 4337 case 1: /* only W-LUNs */ 4338 lun_cnt = 0; 4339 wlun_cnt = 1; 4340 break; 4341 case 2: /* all LUNs */ 4342 lun_cnt = sdebug_max_luns; 4343 wlun_cnt = 1; 4344 break; 4345 case 0x10: /* only administrative LUs */ 4346 case 0x11: /* see SPC-5 */ 4347 case 0x12: /* only subsiduary LUs owned by referenced LU */ 4348 default: 4349 pr_debug("select report invalid %d\n", select_report); 4350 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, -1); 4351 return check_condition_result; 4352 } 4353 4354 if (sdebug_no_lun_0 && (lun_cnt > 0)) 4355 --lun_cnt; 4356 4357 tlun_cnt = lun_cnt + wlun_cnt; 4358 rlen = tlun_cnt * sz_lun; /* excluding 8 byte header */ 4359 scsi_set_resid(scp, scsi_bufflen(scp)); 4360 pr_debug("select_report %d luns = %d wluns = %d no_lun0 %d\n", 4361 select_report, lun_cnt, wlun_cnt, sdebug_no_lun_0); 4362 4363 /* loops rely on sizeof response header same as sizeof lun (both 8) */ 4364 lun = sdebug_no_lun_0 ? 1 : 0; 4365 for (k = 0, j = 0, res = 0; true; ++k, j = 0) { 4366 memset(arr, 0, sizeof(arr)); 4367 lun_p = (struct scsi_lun *)&arr[0]; 4368 if (k == 0) { 4369 put_unaligned_be32(rlen, &arr[0]); 4370 ++lun_p; 4371 j = 1; 4372 } 4373 for ( ; j < RL_BUCKET_ELEMS; ++j, ++lun_p) { 4374 if ((k * RL_BUCKET_ELEMS) + j > lun_cnt) 4375 break; 4376 int_to_scsilun(lun++, lun_p); 4377 if (lun > 1 && sdebug_lun_am == SAM_LUN_AM_FLAT) 4378 lun_p->scsi_lun[0] |= 0x40; 4379 } 4380 if (j < RL_BUCKET_ELEMS) 4381 break; 4382 n = j * sz_lun; 4383 res = p_fill_from_dev_buffer(scp, arr, n, off_rsp); 4384 if (res) 4385 return res; 4386 off_rsp += n; 4387 } 4388 if (wlun_cnt) { 4389 int_to_scsilun(SCSI_W_LUN_REPORT_LUNS, lun_p); 4390 ++j; 4391 } 4392 if (j > 0) 4393 res = p_fill_from_dev_buffer(scp, arr, j * sz_lun, off_rsp); 4394 return res; 4395 } 4396 4397 static int resp_verify(struct scsi_cmnd *scp, struct sdebug_dev_info *devip) 4398 { 4399 bool is_bytchk3 = false; 4400 u8 bytchk; 4401 int ret, j; 4402 u32 vnum, a_num, off; 4403 const u32 lb_size = sdebug_sector_size; 4404 u64 lba; 4405 u8 *arr; 4406 u8 *cmd = scp->cmnd; 4407 struct sdeb_store_info *sip = devip2sip(devip, true); 4408 4409 bytchk = (cmd[1] >> 1) & 0x3; 4410 if (bytchk == 0) { 4411 return 0; /* always claim internal verify okay */ 4412 } else if (bytchk == 2) { 4413 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 2); 4414 return check_condition_result; 4415 } else if (bytchk == 3) { 4416 is_bytchk3 = true; /* 1 block sent, compared repeatedly */ 4417 } 4418 switch (cmd[0]) { 4419 case VERIFY_16: 4420 lba = get_unaligned_be64(cmd + 2); 4421 vnum = get_unaligned_be32(cmd + 10); 4422 break; 4423 case VERIFY: /* is VERIFY(10) */ 4424 lba = get_unaligned_be32(cmd + 2); 4425 vnum = get_unaligned_be16(cmd + 7); 4426 break; 4427 default: 4428 mk_sense_invalid_opcode(scp); 4429 return check_condition_result; 4430 } 4431 if (vnum == 0) 4432 return 0; /* not an error */ 4433 a_num = is_bytchk3 ? 1 : vnum; 4434 /* Treat following check like one for read (i.e. no write) access */ 4435 ret = check_device_access_params(scp, lba, a_num, false); 4436 if (ret) 4437 return ret; 4438 4439 arr = kcalloc(lb_size, vnum, GFP_ATOMIC); 4440 if (!arr) { 4441 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC, 4442 INSUFF_RES_ASCQ); 4443 return check_condition_result; 4444 } 4445 /* Not changing store, so only need read access */ 4446 sdeb_read_lock(sip); 4447 4448 ret = do_dout_fetch(scp, a_num, arr); 4449 if (ret == -1) { 4450 ret = DID_ERROR << 16; 4451 goto cleanup; 4452 } else if (sdebug_verbose && (ret < (a_num * lb_size))) { 4453 sdev_printk(KERN_INFO, scp->device, 4454 "%s: %s: cdb indicated=%u, IO sent=%d bytes\n", 4455 my_name, __func__, a_num * lb_size, ret); 4456 } 4457 if (is_bytchk3) { 4458 for (j = 1, off = lb_size; j < vnum; ++j, off += lb_size) 4459 memcpy(arr + off, arr, lb_size); 4460 } 4461 ret = 0; 4462 if (!comp_write_worker(sip, lba, vnum, arr, true)) { 4463 mk_sense_buffer(scp, MISCOMPARE, MISCOMPARE_VERIFY_ASC, 0); 4464 ret = check_condition_result; 4465 goto cleanup; 4466 } 4467 cleanup: 4468 sdeb_read_unlock(sip); 4469 kfree(arr); 4470 return ret; 4471 } 4472 4473 #define RZONES_DESC_HD 64 4474 4475 /* Report zones depending on start LBA and reporting options */ 4476 static int resp_report_zones(struct scsi_cmnd *scp, 4477 struct sdebug_dev_info *devip) 4478 { 4479 unsigned int rep_max_zones, nrz = 0; 4480 int ret = 0; 4481 u32 alloc_len, rep_opts, rep_len; 4482 bool partial; 4483 u64 lba, zs_lba; 4484 u8 *arr = NULL, *desc; 4485 u8 *cmd = scp->cmnd; 4486 struct sdeb_zone_state *zsp = NULL; 4487 struct sdeb_store_info *sip = devip2sip(devip, false); 4488 4489 if (!sdebug_dev_is_zoned(devip)) { 4490 mk_sense_invalid_opcode(scp); 4491 return check_condition_result; 4492 } 4493 zs_lba = get_unaligned_be64(cmd + 2); 4494 alloc_len = get_unaligned_be32(cmd + 10); 4495 if (alloc_len == 0) 4496 return 0; /* not an error */ 4497 rep_opts = cmd[14] & 0x3f; 4498 partial = cmd[14] & 0x80; 4499 4500 if (zs_lba >= sdebug_capacity) { 4501 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0); 4502 return check_condition_result; 4503 } 4504 4505 rep_max_zones = (alloc_len - 64) >> ilog2(RZONES_DESC_HD); 4506 4507 arr = kzalloc(alloc_len, GFP_ATOMIC); 4508 if (!arr) { 4509 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC, 4510 INSUFF_RES_ASCQ); 4511 return check_condition_result; 4512 } 4513 4514 sdeb_read_lock(sip); 4515 4516 desc = arr + 64; 4517 for (lba = zs_lba; lba < sdebug_capacity; 4518 lba = zsp->z_start + zsp->z_size) { 4519 if (WARN_ONCE(zbc_zone(devip, lba) == zsp, "lba = %llu\n", lba)) 4520 break; 4521 zsp = zbc_zone(devip, lba); 4522 switch (rep_opts) { 4523 case 0x00: 4524 /* All zones */ 4525 break; 4526 case 0x01: 4527 /* Empty zones */ 4528 if (zsp->z_cond != ZC1_EMPTY) 4529 continue; 4530 break; 4531 case 0x02: 4532 /* Implicit open zones */ 4533 if (zsp->z_cond != ZC2_IMPLICIT_OPEN) 4534 continue; 4535 break; 4536 case 0x03: 4537 /* Explicit open zones */ 4538 if (zsp->z_cond != ZC3_EXPLICIT_OPEN) 4539 continue; 4540 break; 4541 case 0x04: 4542 /* Closed zones */ 4543 if (zsp->z_cond != ZC4_CLOSED) 4544 continue; 4545 break; 4546 case 0x05: 4547 /* Full zones */ 4548 if (zsp->z_cond != ZC5_FULL) 4549 continue; 4550 break; 4551 case 0x06: 4552 case 0x07: 4553 case 0x10: 4554 /* 4555 * Read-only, offline, reset WP recommended are 4556 * not emulated: no zones to report; 4557 */ 4558 continue; 4559 case 0x11: 4560 /* non-seq-resource set */ 4561 if (!zsp->z_non_seq_resource) 4562 continue; 4563 break; 4564 case 0x3e: 4565 /* All zones except gap zones. */ 4566 if (zbc_zone_is_gap(zsp)) 4567 continue; 4568 break; 4569 case 0x3f: 4570 /* Not write pointer (conventional) zones */ 4571 if (zbc_zone_is_seq(zsp)) 4572 continue; 4573 break; 4574 default: 4575 mk_sense_buffer(scp, ILLEGAL_REQUEST, 4576 INVALID_FIELD_IN_CDB, 0); 4577 ret = check_condition_result; 4578 goto fini; 4579 } 4580 4581 if (nrz < rep_max_zones) { 4582 /* Fill zone descriptor */ 4583 desc[0] = zsp->z_type; 4584 desc[1] = zsp->z_cond << 4; 4585 if (zsp->z_non_seq_resource) 4586 desc[1] |= 1 << 1; 4587 put_unaligned_be64((u64)zsp->z_size, desc + 8); 4588 put_unaligned_be64((u64)zsp->z_start, desc + 16); 4589 put_unaligned_be64((u64)zsp->z_wp, desc + 24); 4590 desc += 64; 4591 } 4592 4593 if (partial && nrz >= rep_max_zones) 4594 break; 4595 4596 nrz++; 4597 } 4598 4599 /* Report header */ 4600 /* Zone list length. */ 4601 put_unaligned_be32(nrz * RZONES_DESC_HD, arr + 0); 4602 /* Maximum LBA */ 4603 put_unaligned_be64(sdebug_capacity - 1, arr + 8); 4604 /* Zone starting LBA granularity. */ 4605 if (devip->zcap < devip->zsize) 4606 put_unaligned_be64(devip->zsize, arr + 16); 4607 4608 rep_len = (unsigned long)desc - (unsigned long)arr; 4609 ret = fill_from_dev_buffer(scp, arr, min_t(u32, alloc_len, rep_len)); 4610 4611 fini: 4612 sdeb_read_unlock(sip); 4613 kfree(arr); 4614 return ret; 4615 } 4616 4617 /* Logic transplanted from tcmu-runner, file_zbc.c */ 4618 static void zbc_open_all(struct sdebug_dev_info *devip) 4619 { 4620 struct sdeb_zone_state *zsp = &devip->zstate[0]; 4621 unsigned int i; 4622 4623 for (i = 0; i < devip->nr_zones; i++, zsp++) { 4624 if (zsp->z_cond == ZC4_CLOSED) 4625 zbc_open_zone(devip, &devip->zstate[i], true); 4626 } 4627 } 4628 4629 static int resp_open_zone(struct scsi_cmnd *scp, struct sdebug_dev_info *devip) 4630 { 4631 int res = 0; 4632 u64 z_id; 4633 enum sdebug_z_cond zc; 4634 u8 *cmd = scp->cmnd; 4635 struct sdeb_zone_state *zsp; 4636 bool all = cmd[14] & 0x01; 4637 struct sdeb_store_info *sip = devip2sip(devip, false); 4638 4639 if (!sdebug_dev_is_zoned(devip)) { 4640 mk_sense_invalid_opcode(scp); 4641 return check_condition_result; 4642 } 4643 4644 sdeb_write_lock(sip); 4645 4646 if (all) { 4647 /* Check if all closed zones can be open */ 4648 if (devip->max_open && 4649 devip->nr_exp_open + devip->nr_closed > devip->max_open) { 4650 mk_sense_buffer(scp, DATA_PROTECT, INSUFF_RES_ASC, 4651 INSUFF_ZONE_ASCQ); 4652 res = check_condition_result; 4653 goto fini; 4654 } 4655 /* Open all closed zones */ 4656 zbc_open_all(devip); 4657 goto fini; 4658 } 4659 4660 /* Open the specified zone */ 4661 z_id = get_unaligned_be64(cmd + 2); 4662 if (z_id >= sdebug_capacity) { 4663 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0); 4664 res = check_condition_result; 4665 goto fini; 4666 } 4667 4668 zsp = zbc_zone(devip, z_id); 4669 if (z_id != zsp->z_start) { 4670 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0); 4671 res = check_condition_result; 4672 goto fini; 4673 } 4674 if (zbc_zone_is_conv(zsp)) { 4675 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0); 4676 res = check_condition_result; 4677 goto fini; 4678 } 4679 4680 zc = zsp->z_cond; 4681 if (zc == ZC3_EXPLICIT_OPEN || zc == ZC5_FULL) 4682 goto fini; 4683 4684 if (devip->max_open && devip->nr_exp_open >= devip->max_open) { 4685 mk_sense_buffer(scp, DATA_PROTECT, INSUFF_RES_ASC, 4686 INSUFF_ZONE_ASCQ); 4687 res = check_condition_result; 4688 goto fini; 4689 } 4690 4691 zbc_open_zone(devip, zsp, true); 4692 fini: 4693 sdeb_write_unlock(sip); 4694 return res; 4695 } 4696 4697 static void zbc_close_all(struct sdebug_dev_info *devip) 4698 { 4699 unsigned int i; 4700 4701 for (i = 0; i < devip->nr_zones; i++) 4702 zbc_close_zone(devip, &devip->zstate[i]); 4703 } 4704 4705 static int resp_close_zone(struct scsi_cmnd *scp, 4706 struct sdebug_dev_info *devip) 4707 { 4708 int res = 0; 4709 u64 z_id; 4710 u8 *cmd = scp->cmnd; 4711 struct sdeb_zone_state *zsp; 4712 bool all = cmd[14] & 0x01; 4713 struct sdeb_store_info *sip = devip2sip(devip, false); 4714 4715 if (!sdebug_dev_is_zoned(devip)) { 4716 mk_sense_invalid_opcode(scp); 4717 return check_condition_result; 4718 } 4719 4720 sdeb_write_lock(sip); 4721 4722 if (all) { 4723 zbc_close_all(devip); 4724 goto fini; 4725 } 4726 4727 /* Close specified zone */ 4728 z_id = get_unaligned_be64(cmd + 2); 4729 if (z_id >= sdebug_capacity) { 4730 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0); 4731 res = check_condition_result; 4732 goto fini; 4733 } 4734 4735 zsp = zbc_zone(devip, z_id); 4736 if (z_id != zsp->z_start) { 4737 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0); 4738 res = check_condition_result; 4739 goto fini; 4740 } 4741 if (zbc_zone_is_conv(zsp)) { 4742 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0); 4743 res = check_condition_result; 4744 goto fini; 4745 } 4746 4747 zbc_close_zone(devip, zsp); 4748 fini: 4749 sdeb_write_unlock(sip); 4750 return res; 4751 } 4752 4753 static void zbc_finish_zone(struct sdebug_dev_info *devip, 4754 struct sdeb_zone_state *zsp, bool empty) 4755 { 4756 enum sdebug_z_cond zc = zsp->z_cond; 4757 4758 if (zc == ZC4_CLOSED || zc == ZC2_IMPLICIT_OPEN || 4759 zc == ZC3_EXPLICIT_OPEN || (empty && zc == ZC1_EMPTY)) { 4760 if (zc == ZC2_IMPLICIT_OPEN || zc == ZC3_EXPLICIT_OPEN) 4761 zbc_close_zone(devip, zsp); 4762 if (zsp->z_cond == ZC4_CLOSED) 4763 devip->nr_closed--; 4764 zsp->z_wp = zsp->z_start + zsp->z_size; 4765 zsp->z_cond = ZC5_FULL; 4766 } 4767 } 4768 4769 static void zbc_finish_all(struct sdebug_dev_info *devip) 4770 { 4771 unsigned int i; 4772 4773 for (i = 0; i < devip->nr_zones; i++) 4774 zbc_finish_zone(devip, &devip->zstate[i], false); 4775 } 4776 4777 static int resp_finish_zone(struct scsi_cmnd *scp, 4778 struct sdebug_dev_info *devip) 4779 { 4780 struct sdeb_zone_state *zsp; 4781 int res = 0; 4782 u64 z_id; 4783 u8 *cmd = scp->cmnd; 4784 bool all = cmd[14] & 0x01; 4785 struct sdeb_store_info *sip = devip2sip(devip, false); 4786 4787 if (!sdebug_dev_is_zoned(devip)) { 4788 mk_sense_invalid_opcode(scp); 4789 return check_condition_result; 4790 } 4791 4792 sdeb_write_lock(sip); 4793 4794 if (all) { 4795 zbc_finish_all(devip); 4796 goto fini; 4797 } 4798 4799 /* Finish the specified zone */ 4800 z_id = get_unaligned_be64(cmd + 2); 4801 if (z_id >= sdebug_capacity) { 4802 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0); 4803 res = check_condition_result; 4804 goto fini; 4805 } 4806 4807 zsp = zbc_zone(devip, z_id); 4808 if (z_id != zsp->z_start) { 4809 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0); 4810 res = check_condition_result; 4811 goto fini; 4812 } 4813 if (zbc_zone_is_conv(zsp)) { 4814 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0); 4815 res = check_condition_result; 4816 goto fini; 4817 } 4818 4819 zbc_finish_zone(devip, zsp, true); 4820 fini: 4821 sdeb_write_unlock(sip); 4822 return res; 4823 } 4824 4825 static void zbc_rwp_zone(struct sdebug_dev_info *devip, 4826 struct sdeb_zone_state *zsp) 4827 { 4828 enum sdebug_z_cond zc; 4829 struct sdeb_store_info *sip = devip2sip(devip, false); 4830 4831 if (!zbc_zone_is_seq(zsp)) 4832 return; 4833 4834 zc = zsp->z_cond; 4835 if (zc == ZC2_IMPLICIT_OPEN || zc == ZC3_EXPLICIT_OPEN) 4836 zbc_close_zone(devip, zsp); 4837 4838 if (zsp->z_cond == ZC4_CLOSED) 4839 devip->nr_closed--; 4840 4841 if (zsp->z_wp > zsp->z_start) 4842 memset(sip->storep + zsp->z_start * sdebug_sector_size, 0, 4843 (zsp->z_wp - zsp->z_start) * sdebug_sector_size); 4844 4845 zsp->z_non_seq_resource = false; 4846 zsp->z_wp = zsp->z_start; 4847 zsp->z_cond = ZC1_EMPTY; 4848 } 4849 4850 static void zbc_rwp_all(struct sdebug_dev_info *devip) 4851 { 4852 unsigned int i; 4853 4854 for (i = 0; i < devip->nr_zones; i++) 4855 zbc_rwp_zone(devip, &devip->zstate[i]); 4856 } 4857 4858 static int resp_rwp_zone(struct scsi_cmnd *scp, struct sdebug_dev_info *devip) 4859 { 4860 struct sdeb_zone_state *zsp; 4861 int res = 0; 4862 u64 z_id; 4863 u8 *cmd = scp->cmnd; 4864 bool all = cmd[14] & 0x01; 4865 struct sdeb_store_info *sip = devip2sip(devip, false); 4866 4867 if (!sdebug_dev_is_zoned(devip)) { 4868 mk_sense_invalid_opcode(scp); 4869 return check_condition_result; 4870 } 4871 4872 sdeb_write_lock(sip); 4873 4874 if (all) { 4875 zbc_rwp_all(devip); 4876 goto fini; 4877 } 4878 4879 z_id = get_unaligned_be64(cmd + 2); 4880 if (z_id >= sdebug_capacity) { 4881 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0); 4882 res = check_condition_result; 4883 goto fini; 4884 } 4885 4886 zsp = zbc_zone(devip, z_id); 4887 if (z_id != zsp->z_start) { 4888 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0); 4889 res = check_condition_result; 4890 goto fini; 4891 } 4892 if (zbc_zone_is_conv(zsp)) { 4893 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0); 4894 res = check_condition_result; 4895 goto fini; 4896 } 4897 4898 zbc_rwp_zone(devip, zsp); 4899 fini: 4900 sdeb_write_unlock(sip); 4901 return res; 4902 } 4903 4904 static struct sdebug_queue *get_queue(struct scsi_cmnd *cmnd) 4905 { 4906 u16 hwq; 4907 u32 tag = blk_mq_unique_tag(scsi_cmd_to_rq(cmnd)); 4908 4909 hwq = blk_mq_unique_tag_to_hwq(tag); 4910 4911 pr_debug("tag=%#x, hwq=%d\n", tag, hwq); 4912 if (WARN_ON_ONCE(hwq >= submit_queues)) 4913 hwq = 0; 4914 4915 return sdebug_q_arr + hwq; 4916 } 4917 4918 static u32 get_tag(struct scsi_cmnd *cmnd) 4919 { 4920 return blk_mq_unique_tag(scsi_cmd_to_rq(cmnd)); 4921 } 4922 4923 /* Queued (deferred) command completions converge here. */ 4924 static void sdebug_q_cmd_complete(struct sdebug_defer *sd_dp) 4925 { 4926 bool aborted = sd_dp->aborted; 4927 int qc_idx; 4928 int retiring = 0; 4929 unsigned long iflags; 4930 struct sdebug_queue *sqp; 4931 struct sdebug_queued_cmd *sqcp; 4932 struct scsi_cmnd *scp; 4933 struct sdebug_dev_info *devip; 4934 4935 if (unlikely(aborted)) 4936 sd_dp->aborted = false; 4937 qc_idx = sd_dp->qc_idx; 4938 sqp = sdebug_q_arr + sd_dp->sqa_idx; 4939 if (sdebug_statistics) { 4940 atomic_inc(&sdebug_completions); 4941 if (raw_smp_processor_id() != sd_dp->issuing_cpu) 4942 atomic_inc(&sdebug_miss_cpus); 4943 } 4944 if (unlikely((qc_idx < 0) || (qc_idx >= SDEBUG_CANQUEUE))) { 4945 pr_err("wild qc_idx=%d\n", qc_idx); 4946 return; 4947 } 4948 spin_lock_irqsave(&sqp->qc_lock, iflags); 4949 WRITE_ONCE(sd_dp->defer_t, SDEB_DEFER_NONE); 4950 sqcp = &sqp->qc_arr[qc_idx]; 4951 scp = sqcp->a_cmnd; 4952 if (unlikely(scp == NULL)) { 4953 spin_unlock_irqrestore(&sqp->qc_lock, iflags); 4954 pr_err("scp is NULL, sqa_idx=%d, qc_idx=%d, hc_idx=%d\n", 4955 sd_dp->sqa_idx, qc_idx, sd_dp->hc_idx); 4956 return; 4957 } 4958 devip = (struct sdebug_dev_info *)scp->device->hostdata; 4959 if (likely(devip)) 4960 atomic_dec(&devip->num_in_q); 4961 else 4962 pr_err("devip=NULL\n"); 4963 if (unlikely(atomic_read(&retired_max_queue) > 0)) 4964 retiring = 1; 4965 4966 sqcp->a_cmnd = NULL; 4967 if (unlikely(!test_and_clear_bit(qc_idx, sqp->in_use_bm))) { 4968 spin_unlock_irqrestore(&sqp->qc_lock, iflags); 4969 pr_err("Unexpected completion\n"); 4970 return; 4971 } 4972 4973 if (unlikely(retiring)) { /* user has reduced max_queue */ 4974 int k, retval; 4975 4976 retval = atomic_read(&retired_max_queue); 4977 if (qc_idx >= retval) { 4978 spin_unlock_irqrestore(&sqp->qc_lock, iflags); 4979 pr_err("index %d too large\n", retval); 4980 return; 4981 } 4982 k = find_last_bit(sqp->in_use_bm, retval); 4983 if ((k < sdebug_max_queue) || (k == retval)) 4984 atomic_set(&retired_max_queue, 0); 4985 else 4986 atomic_set(&retired_max_queue, k + 1); 4987 } 4988 spin_unlock_irqrestore(&sqp->qc_lock, iflags); 4989 if (unlikely(aborted)) { 4990 if (sdebug_verbose) 4991 pr_info("bypassing scsi_done() due to aborted cmd\n"); 4992 return; 4993 } 4994 scsi_done(scp); /* callback to mid level */ 4995 } 4996 4997 /* When high resolution timer goes off this function is called. */ 4998 static enum hrtimer_restart sdebug_q_cmd_hrt_complete(struct hrtimer *timer) 4999 { 5000 struct sdebug_defer *sd_dp = container_of(timer, struct sdebug_defer, 5001 hrt); 5002 sdebug_q_cmd_complete(sd_dp); 5003 return HRTIMER_NORESTART; 5004 } 5005 5006 /* When work queue schedules work, it calls this function. */ 5007 static void sdebug_q_cmd_wq_complete(struct work_struct *work) 5008 { 5009 struct sdebug_defer *sd_dp = container_of(work, struct sdebug_defer, 5010 ew.work); 5011 sdebug_q_cmd_complete(sd_dp); 5012 } 5013 5014 static bool got_shared_uuid; 5015 static uuid_t shared_uuid; 5016 5017 static int sdebug_device_create_zones(struct sdebug_dev_info *devip) 5018 { 5019 struct sdeb_zone_state *zsp; 5020 sector_t capacity = get_sdebug_capacity(); 5021 sector_t conv_capacity; 5022 sector_t zstart = 0; 5023 unsigned int i; 5024 5025 /* 5026 * Set the zone size: if sdeb_zbc_zone_size_mb is not set, figure out 5027 * a zone size allowing for at least 4 zones on the device. Otherwise, 5028 * use the specified zone size checking that at least 2 zones can be 5029 * created for the device. 5030 */ 5031 if (!sdeb_zbc_zone_size_mb) { 5032 devip->zsize = (DEF_ZBC_ZONE_SIZE_MB * SZ_1M) 5033 >> ilog2(sdebug_sector_size); 5034 while (capacity < devip->zsize << 2 && devip->zsize >= 2) 5035 devip->zsize >>= 1; 5036 if (devip->zsize < 2) { 5037 pr_err("Device capacity too small\n"); 5038 return -EINVAL; 5039 } 5040 } else { 5041 if (!is_power_of_2(sdeb_zbc_zone_size_mb)) { 5042 pr_err("Zone size is not a power of 2\n"); 5043 return -EINVAL; 5044 } 5045 devip->zsize = (sdeb_zbc_zone_size_mb * SZ_1M) 5046 >> ilog2(sdebug_sector_size); 5047 if (devip->zsize >= capacity) { 5048 pr_err("Zone size too large for device capacity\n"); 5049 return -EINVAL; 5050 } 5051 } 5052 5053 devip->zsize_shift = ilog2(devip->zsize); 5054 devip->nr_zones = (capacity + devip->zsize - 1) >> devip->zsize_shift; 5055 5056 if (sdeb_zbc_zone_cap_mb == 0) { 5057 devip->zcap = devip->zsize; 5058 } else { 5059 devip->zcap = (sdeb_zbc_zone_cap_mb * SZ_1M) >> 5060 ilog2(sdebug_sector_size); 5061 if (devip->zcap > devip->zsize) { 5062 pr_err("Zone capacity too large\n"); 5063 return -EINVAL; 5064 } 5065 } 5066 5067 conv_capacity = (sector_t)sdeb_zbc_nr_conv << devip->zsize_shift; 5068 if (conv_capacity >= capacity) { 5069 pr_err("Number of conventional zones too large\n"); 5070 return -EINVAL; 5071 } 5072 devip->nr_conv_zones = sdeb_zbc_nr_conv; 5073 devip->nr_seq_zones = ALIGN(capacity - conv_capacity, devip->zsize) >> 5074 devip->zsize_shift; 5075 devip->nr_zones = devip->nr_conv_zones + devip->nr_seq_zones; 5076 5077 /* Add gap zones if zone capacity is smaller than the zone size */ 5078 if (devip->zcap < devip->zsize) 5079 devip->nr_zones += devip->nr_seq_zones; 5080 5081 if (devip->zmodel == BLK_ZONED_HM) { 5082 /* zbc_max_open_zones can be 0, meaning "not reported" */ 5083 if (sdeb_zbc_max_open >= devip->nr_zones - 1) 5084 devip->max_open = (devip->nr_zones - 1) / 2; 5085 else 5086 devip->max_open = sdeb_zbc_max_open; 5087 } 5088 5089 devip->zstate = kcalloc(devip->nr_zones, 5090 sizeof(struct sdeb_zone_state), GFP_KERNEL); 5091 if (!devip->zstate) 5092 return -ENOMEM; 5093 5094 for (i = 0; i < devip->nr_zones; i++) { 5095 zsp = &devip->zstate[i]; 5096 5097 zsp->z_start = zstart; 5098 5099 if (i < devip->nr_conv_zones) { 5100 zsp->z_type = ZBC_ZTYPE_CNV; 5101 zsp->z_cond = ZBC_NOT_WRITE_POINTER; 5102 zsp->z_wp = (sector_t)-1; 5103 zsp->z_size = 5104 min_t(u64, devip->zsize, capacity - zstart); 5105 } else if ((zstart & (devip->zsize - 1)) == 0) { 5106 if (devip->zmodel == BLK_ZONED_HM) 5107 zsp->z_type = ZBC_ZTYPE_SWR; 5108 else 5109 zsp->z_type = ZBC_ZTYPE_SWP; 5110 zsp->z_cond = ZC1_EMPTY; 5111 zsp->z_wp = zsp->z_start; 5112 zsp->z_size = 5113 min_t(u64, devip->zcap, capacity - zstart); 5114 } else { 5115 zsp->z_type = ZBC_ZTYPE_GAP; 5116 zsp->z_cond = ZBC_NOT_WRITE_POINTER; 5117 zsp->z_wp = (sector_t)-1; 5118 zsp->z_size = min_t(u64, devip->zsize - devip->zcap, 5119 capacity - zstart); 5120 } 5121 5122 WARN_ON_ONCE((int)zsp->z_size <= 0); 5123 zstart += zsp->z_size; 5124 } 5125 5126 return 0; 5127 } 5128 5129 static struct sdebug_dev_info *sdebug_device_create( 5130 struct sdebug_host_info *sdbg_host, gfp_t flags) 5131 { 5132 struct sdebug_dev_info *devip; 5133 5134 devip = kzalloc(sizeof(*devip), flags); 5135 if (devip) { 5136 if (sdebug_uuid_ctl == 1) 5137 uuid_gen(&devip->lu_name); 5138 else if (sdebug_uuid_ctl == 2) { 5139 if (got_shared_uuid) 5140 devip->lu_name = shared_uuid; 5141 else { 5142 uuid_gen(&shared_uuid); 5143 got_shared_uuid = true; 5144 devip->lu_name = shared_uuid; 5145 } 5146 } 5147 devip->sdbg_host = sdbg_host; 5148 if (sdeb_zbc_in_use) { 5149 devip->zmodel = sdeb_zbc_model; 5150 if (sdebug_device_create_zones(devip)) { 5151 kfree(devip); 5152 return NULL; 5153 } 5154 } else { 5155 devip->zmodel = BLK_ZONED_NONE; 5156 } 5157 devip->sdbg_host = sdbg_host; 5158 devip->create_ts = ktime_get_boottime(); 5159 atomic_set(&devip->stopped, (sdeb_tur_ms_to_ready > 0 ? 2 : 0)); 5160 list_add_tail(&devip->dev_list, &sdbg_host->dev_info_list); 5161 } 5162 return devip; 5163 } 5164 5165 static struct sdebug_dev_info *find_build_dev_info(struct scsi_device *sdev) 5166 { 5167 struct sdebug_host_info *sdbg_host; 5168 struct sdebug_dev_info *open_devip = NULL; 5169 struct sdebug_dev_info *devip; 5170 5171 sdbg_host = *(struct sdebug_host_info **)shost_priv(sdev->host); 5172 if (!sdbg_host) { 5173 pr_err("Host info NULL\n"); 5174 return NULL; 5175 } 5176 5177 list_for_each_entry(devip, &sdbg_host->dev_info_list, dev_list) { 5178 if ((devip->used) && (devip->channel == sdev->channel) && 5179 (devip->target == sdev->id) && 5180 (devip->lun == sdev->lun)) 5181 return devip; 5182 else { 5183 if ((!devip->used) && (!open_devip)) 5184 open_devip = devip; 5185 } 5186 } 5187 if (!open_devip) { /* try and make a new one */ 5188 open_devip = sdebug_device_create(sdbg_host, GFP_ATOMIC); 5189 if (!open_devip) { 5190 pr_err("out of memory at line %d\n", __LINE__); 5191 return NULL; 5192 } 5193 } 5194 5195 open_devip->channel = sdev->channel; 5196 open_devip->target = sdev->id; 5197 open_devip->lun = sdev->lun; 5198 open_devip->sdbg_host = sdbg_host; 5199 atomic_set(&open_devip->num_in_q, 0); 5200 set_bit(SDEBUG_UA_POOCCUR, open_devip->uas_bm); 5201 open_devip->used = true; 5202 return open_devip; 5203 } 5204 5205 static int scsi_debug_slave_alloc(struct scsi_device *sdp) 5206 { 5207 if (sdebug_verbose) 5208 pr_info("slave_alloc <%u %u %u %llu>\n", 5209 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun); 5210 return 0; 5211 } 5212 5213 static int scsi_debug_slave_configure(struct scsi_device *sdp) 5214 { 5215 struct sdebug_dev_info *devip = 5216 (struct sdebug_dev_info *)sdp->hostdata; 5217 5218 if (sdebug_verbose) 5219 pr_info("slave_configure <%u %u %u %llu>\n", 5220 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun); 5221 if (sdp->host->max_cmd_len != SDEBUG_MAX_CMD_LEN) 5222 sdp->host->max_cmd_len = SDEBUG_MAX_CMD_LEN; 5223 if (devip == NULL) { 5224 devip = find_build_dev_info(sdp); 5225 if (devip == NULL) 5226 return 1; /* no resources, will be marked offline */ 5227 } 5228 sdp->hostdata = devip; 5229 if (sdebug_no_uld) 5230 sdp->no_uld_attach = 1; 5231 config_cdb_len(sdp); 5232 return 0; 5233 } 5234 5235 static void scsi_debug_slave_destroy(struct scsi_device *sdp) 5236 { 5237 struct sdebug_dev_info *devip = 5238 (struct sdebug_dev_info *)sdp->hostdata; 5239 5240 if (sdebug_verbose) 5241 pr_info("slave_destroy <%u %u %u %llu>\n", 5242 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun); 5243 if (devip) { 5244 /* make this slot available for re-use */ 5245 devip->used = false; 5246 sdp->hostdata = NULL; 5247 } 5248 } 5249 5250 static void stop_qc_helper(struct sdebug_defer *sd_dp, 5251 enum sdeb_defer_type defer_t) 5252 { 5253 if (!sd_dp) 5254 return; 5255 if (defer_t == SDEB_DEFER_HRT) 5256 hrtimer_cancel(&sd_dp->hrt); 5257 else if (defer_t == SDEB_DEFER_WQ) 5258 cancel_work_sync(&sd_dp->ew.work); 5259 } 5260 5261 /* If @cmnd found deletes its timer or work queue and returns true; else 5262 returns false */ 5263 static bool stop_queued_cmnd(struct scsi_cmnd *cmnd) 5264 { 5265 unsigned long iflags; 5266 int j, k, qmax, r_qmax; 5267 enum sdeb_defer_type l_defer_t; 5268 struct sdebug_queue *sqp; 5269 struct sdebug_queued_cmd *sqcp; 5270 struct sdebug_dev_info *devip; 5271 struct sdebug_defer *sd_dp; 5272 5273 for (j = 0, sqp = sdebug_q_arr; j < submit_queues; ++j, ++sqp) { 5274 spin_lock_irqsave(&sqp->qc_lock, iflags); 5275 qmax = sdebug_max_queue; 5276 r_qmax = atomic_read(&retired_max_queue); 5277 if (r_qmax > qmax) 5278 qmax = r_qmax; 5279 for (k = 0; k < qmax; ++k) { 5280 if (test_bit(k, sqp->in_use_bm)) { 5281 sqcp = &sqp->qc_arr[k]; 5282 if (cmnd != sqcp->a_cmnd) 5283 continue; 5284 /* found */ 5285 devip = (struct sdebug_dev_info *) 5286 cmnd->device->hostdata; 5287 if (devip) 5288 atomic_dec(&devip->num_in_q); 5289 sqcp->a_cmnd = NULL; 5290 sd_dp = sqcp->sd_dp; 5291 if (sd_dp) { 5292 l_defer_t = READ_ONCE(sd_dp->defer_t); 5293 WRITE_ONCE(sd_dp->defer_t, SDEB_DEFER_NONE); 5294 } else 5295 l_defer_t = SDEB_DEFER_NONE; 5296 spin_unlock_irqrestore(&sqp->qc_lock, iflags); 5297 stop_qc_helper(sd_dp, l_defer_t); 5298 clear_bit(k, sqp->in_use_bm); 5299 return true; 5300 } 5301 } 5302 spin_unlock_irqrestore(&sqp->qc_lock, iflags); 5303 } 5304 return false; 5305 } 5306 5307 /* Deletes (stops) timers or work queues of all queued commands */ 5308 static void stop_all_queued(void) 5309 { 5310 unsigned long iflags; 5311 int j, k; 5312 enum sdeb_defer_type l_defer_t; 5313 struct sdebug_queue *sqp; 5314 struct sdebug_queued_cmd *sqcp; 5315 struct sdebug_dev_info *devip; 5316 struct sdebug_defer *sd_dp; 5317 5318 for (j = 0, sqp = sdebug_q_arr; j < submit_queues; ++j, ++sqp) { 5319 spin_lock_irqsave(&sqp->qc_lock, iflags); 5320 for (k = 0; k < SDEBUG_CANQUEUE; ++k) { 5321 if (test_bit(k, sqp->in_use_bm)) { 5322 sqcp = &sqp->qc_arr[k]; 5323 if (sqcp->a_cmnd == NULL) 5324 continue; 5325 devip = (struct sdebug_dev_info *) 5326 sqcp->a_cmnd->device->hostdata; 5327 if (devip) 5328 atomic_dec(&devip->num_in_q); 5329 sqcp->a_cmnd = NULL; 5330 sd_dp = sqcp->sd_dp; 5331 if (sd_dp) { 5332 l_defer_t = READ_ONCE(sd_dp->defer_t); 5333 WRITE_ONCE(sd_dp->defer_t, SDEB_DEFER_NONE); 5334 } else 5335 l_defer_t = SDEB_DEFER_NONE; 5336 spin_unlock_irqrestore(&sqp->qc_lock, iflags); 5337 stop_qc_helper(sd_dp, l_defer_t); 5338 clear_bit(k, sqp->in_use_bm); 5339 spin_lock_irqsave(&sqp->qc_lock, iflags); 5340 } 5341 } 5342 spin_unlock_irqrestore(&sqp->qc_lock, iflags); 5343 } 5344 } 5345 5346 /* Free queued command memory on heap */ 5347 static void free_all_queued(void) 5348 { 5349 int j, k; 5350 struct sdebug_queue *sqp; 5351 struct sdebug_queued_cmd *sqcp; 5352 5353 for (j = 0, sqp = sdebug_q_arr; j < submit_queues; ++j, ++sqp) { 5354 for (k = 0; k < SDEBUG_CANQUEUE; ++k) { 5355 sqcp = &sqp->qc_arr[k]; 5356 kfree(sqcp->sd_dp); 5357 sqcp->sd_dp = NULL; 5358 } 5359 } 5360 } 5361 5362 static int scsi_debug_abort(struct scsi_cmnd *SCpnt) 5363 { 5364 bool ok; 5365 5366 ++num_aborts; 5367 if (SCpnt) { 5368 ok = stop_queued_cmnd(SCpnt); 5369 if (SCpnt->device && (SDEBUG_OPT_ALL_NOISE & sdebug_opts)) 5370 sdev_printk(KERN_INFO, SCpnt->device, 5371 "%s: command%s found\n", __func__, 5372 ok ? "" : " not"); 5373 } 5374 return SUCCESS; 5375 } 5376 5377 static int scsi_debug_device_reset(struct scsi_cmnd *SCpnt) 5378 { 5379 ++num_dev_resets; 5380 if (SCpnt && SCpnt->device) { 5381 struct scsi_device *sdp = SCpnt->device; 5382 struct sdebug_dev_info *devip = 5383 (struct sdebug_dev_info *)sdp->hostdata; 5384 5385 if (SDEBUG_OPT_ALL_NOISE & sdebug_opts) 5386 sdev_printk(KERN_INFO, sdp, "%s\n", __func__); 5387 if (devip) 5388 set_bit(SDEBUG_UA_POR, devip->uas_bm); 5389 } 5390 return SUCCESS; 5391 } 5392 5393 static int scsi_debug_target_reset(struct scsi_cmnd *SCpnt) 5394 { 5395 struct sdebug_host_info *sdbg_host; 5396 struct sdebug_dev_info *devip; 5397 struct scsi_device *sdp; 5398 struct Scsi_Host *hp; 5399 int k = 0; 5400 5401 ++num_target_resets; 5402 if (!SCpnt) 5403 goto lie; 5404 sdp = SCpnt->device; 5405 if (!sdp) 5406 goto lie; 5407 if (SDEBUG_OPT_ALL_NOISE & sdebug_opts) 5408 sdev_printk(KERN_INFO, sdp, "%s\n", __func__); 5409 hp = sdp->host; 5410 if (!hp) 5411 goto lie; 5412 sdbg_host = *(struct sdebug_host_info **)shost_priv(hp); 5413 if (sdbg_host) { 5414 list_for_each_entry(devip, 5415 &sdbg_host->dev_info_list, 5416 dev_list) 5417 if (devip->target == sdp->id) { 5418 set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm); 5419 ++k; 5420 } 5421 } 5422 if (SDEBUG_OPT_RESET_NOISE & sdebug_opts) 5423 sdev_printk(KERN_INFO, sdp, 5424 "%s: %d device(s) found in target\n", __func__, k); 5425 lie: 5426 return SUCCESS; 5427 } 5428 5429 static int scsi_debug_bus_reset(struct scsi_cmnd *SCpnt) 5430 { 5431 struct sdebug_host_info *sdbg_host; 5432 struct sdebug_dev_info *devip; 5433 struct scsi_device *sdp; 5434 struct Scsi_Host *hp; 5435 int k = 0; 5436 5437 ++num_bus_resets; 5438 if (!(SCpnt && SCpnt->device)) 5439 goto lie; 5440 sdp = SCpnt->device; 5441 if (SDEBUG_OPT_ALL_NOISE & sdebug_opts) 5442 sdev_printk(KERN_INFO, sdp, "%s\n", __func__); 5443 hp = sdp->host; 5444 if (hp) { 5445 sdbg_host = *(struct sdebug_host_info **)shost_priv(hp); 5446 if (sdbg_host) { 5447 list_for_each_entry(devip, 5448 &sdbg_host->dev_info_list, 5449 dev_list) { 5450 set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm); 5451 ++k; 5452 } 5453 } 5454 } 5455 if (SDEBUG_OPT_RESET_NOISE & sdebug_opts) 5456 sdev_printk(KERN_INFO, sdp, 5457 "%s: %d device(s) found in host\n", __func__, k); 5458 lie: 5459 return SUCCESS; 5460 } 5461 5462 static int scsi_debug_host_reset(struct scsi_cmnd *SCpnt) 5463 { 5464 struct sdebug_host_info *sdbg_host; 5465 struct sdebug_dev_info *devip; 5466 int k = 0; 5467 5468 ++num_host_resets; 5469 if ((SCpnt->device) && (SDEBUG_OPT_ALL_NOISE & sdebug_opts)) 5470 sdev_printk(KERN_INFO, SCpnt->device, "%s\n", __func__); 5471 spin_lock(&sdebug_host_list_lock); 5472 list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) { 5473 list_for_each_entry(devip, &sdbg_host->dev_info_list, 5474 dev_list) { 5475 set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm); 5476 ++k; 5477 } 5478 } 5479 spin_unlock(&sdebug_host_list_lock); 5480 stop_all_queued(); 5481 if (SDEBUG_OPT_RESET_NOISE & sdebug_opts) 5482 sdev_printk(KERN_INFO, SCpnt->device, 5483 "%s: %d device(s) found\n", __func__, k); 5484 return SUCCESS; 5485 } 5486 5487 static void sdebug_build_parts(unsigned char *ramp, unsigned long store_size) 5488 { 5489 struct msdos_partition *pp; 5490 int starts[SDEBUG_MAX_PARTS + 2], max_part_secs; 5491 int sectors_per_part, num_sectors, k; 5492 int heads_by_sects, start_sec, end_sec; 5493 5494 /* assume partition table already zeroed */ 5495 if ((sdebug_num_parts < 1) || (store_size < 1048576)) 5496 return; 5497 if (sdebug_num_parts > SDEBUG_MAX_PARTS) { 5498 sdebug_num_parts = SDEBUG_MAX_PARTS; 5499 pr_warn("reducing partitions to %d\n", SDEBUG_MAX_PARTS); 5500 } 5501 num_sectors = (int)get_sdebug_capacity(); 5502 sectors_per_part = (num_sectors - sdebug_sectors_per) 5503 / sdebug_num_parts; 5504 heads_by_sects = sdebug_heads * sdebug_sectors_per; 5505 starts[0] = sdebug_sectors_per; 5506 max_part_secs = sectors_per_part; 5507 for (k = 1; k < sdebug_num_parts; ++k) { 5508 starts[k] = ((k * sectors_per_part) / heads_by_sects) 5509 * heads_by_sects; 5510 if (starts[k] - starts[k - 1] < max_part_secs) 5511 max_part_secs = starts[k] - starts[k - 1]; 5512 } 5513 starts[sdebug_num_parts] = num_sectors; 5514 starts[sdebug_num_parts + 1] = 0; 5515 5516 ramp[510] = 0x55; /* magic partition markings */ 5517 ramp[511] = 0xAA; 5518 pp = (struct msdos_partition *)(ramp + 0x1be); 5519 for (k = 0; starts[k + 1]; ++k, ++pp) { 5520 start_sec = starts[k]; 5521 end_sec = starts[k] + max_part_secs - 1; 5522 pp->boot_ind = 0; 5523 5524 pp->cyl = start_sec / heads_by_sects; 5525 pp->head = (start_sec - (pp->cyl * heads_by_sects)) 5526 / sdebug_sectors_per; 5527 pp->sector = (start_sec % sdebug_sectors_per) + 1; 5528 5529 pp->end_cyl = end_sec / heads_by_sects; 5530 pp->end_head = (end_sec - (pp->end_cyl * heads_by_sects)) 5531 / sdebug_sectors_per; 5532 pp->end_sector = (end_sec % sdebug_sectors_per) + 1; 5533 5534 pp->start_sect = cpu_to_le32(start_sec); 5535 pp->nr_sects = cpu_to_le32(end_sec - start_sec + 1); 5536 pp->sys_ind = 0x83; /* plain Linux partition */ 5537 } 5538 } 5539 5540 static void block_unblock_all_queues(bool block) 5541 { 5542 int j; 5543 struct sdebug_queue *sqp; 5544 5545 for (j = 0, sqp = sdebug_q_arr; j < submit_queues; ++j, ++sqp) 5546 atomic_set(&sqp->blocked, (int)block); 5547 } 5548 5549 /* Adjust (by rounding down) the sdebug_cmnd_count so abs(every_nth)-1 5550 * commands will be processed normally before triggers occur. 5551 */ 5552 static void tweak_cmnd_count(void) 5553 { 5554 int count, modulo; 5555 5556 modulo = abs(sdebug_every_nth); 5557 if (modulo < 2) 5558 return; 5559 block_unblock_all_queues(true); 5560 count = atomic_read(&sdebug_cmnd_count); 5561 atomic_set(&sdebug_cmnd_count, (count / modulo) * modulo); 5562 block_unblock_all_queues(false); 5563 } 5564 5565 static void clear_queue_stats(void) 5566 { 5567 atomic_set(&sdebug_cmnd_count, 0); 5568 atomic_set(&sdebug_completions, 0); 5569 atomic_set(&sdebug_miss_cpus, 0); 5570 atomic_set(&sdebug_a_tsf, 0); 5571 } 5572 5573 static bool inject_on_this_cmd(void) 5574 { 5575 if (sdebug_every_nth == 0) 5576 return false; 5577 return (atomic_read(&sdebug_cmnd_count) % abs(sdebug_every_nth)) == 0; 5578 } 5579 5580 #define INCLUSIVE_TIMING_MAX_NS 1000000 /* 1 millisecond */ 5581 5582 /* Complete the processing of the thread that queued a SCSI command to this 5583 * driver. It either completes the command by calling cmnd_done() or 5584 * schedules a hr timer or work queue then returns 0. Returns 5585 * SCSI_MLQUEUE_HOST_BUSY if temporarily out of resources. 5586 */ 5587 static int schedule_resp(struct scsi_cmnd *cmnd, struct sdebug_dev_info *devip, 5588 int scsi_result, 5589 int (*pfp)(struct scsi_cmnd *, 5590 struct sdebug_dev_info *), 5591 int delta_jiff, int ndelay) 5592 { 5593 bool new_sd_dp; 5594 bool inject = false; 5595 bool polled = scsi_cmd_to_rq(cmnd)->cmd_flags & REQ_POLLED; 5596 int k, num_in_q, qdepth; 5597 unsigned long iflags; 5598 u64 ns_from_boot = 0; 5599 struct sdebug_queue *sqp; 5600 struct sdebug_queued_cmd *sqcp; 5601 struct scsi_device *sdp; 5602 struct sdebug_defer *sd_dp; 5603 5604 if (unlikely(devip == NULL)) { 5605 if (scsi_result == 0) 5606 scsi_result = DID_NO_CONNECT << 16; 5607 goto respond_in_thread; 5608 } 5609 sdp = cmnd->device; 5610 5611 if (delta_jiff == 0) 5612 goto respond_in_thread; 5613 5614 sqp = get_queue(cmnd); 5615 spin_lock_irqsave(&sqp->qc_lock, iflags); 5616 if (unlikely(atomic_read(&sqp->blocked))) { 5617 spin_unlock_irqrestore(&sqp->qc_lock, iflags); 5618 return SCSI_MLQUEUE_HOST_BUSY; 5619 } 5620 num_in_q = atomic_read(&devip->num_in_q); 5621 qdepth = cmnd->device->queue_depth; 5622 if (unlikely((qdepth > 0) && (num_in_q >= qdepth))) { 5623 if (scsi_result) { 5624 spin_unlock_irqrestore(&sqp->qc_lock, iflags); 5625 goto respond_in_thread; 5626 } else 5627 scsi_result = device_qfull_result; 5628 } else if (unlikely(sdebug_every_nth && 5629 (SDEBUG_OPT_RARE_TSF & sdebug_opts) && 5630 (scsi_result == 0))) { 5631 if ((num_in_q == (qdepth - 1)) && 5632 (atomic_inc_return(&sdebug_a_tsf) >= 5633 abs(sdebug_every_nth))) { 5634 atomic_set(&sdebug_a_tsf, 0); 5635 inject = true; 5636 scsi_result = device_qfull_result; 5637 } 5638 } 5639 5640 k = find_first_zero_bit(sqp->in_use_bm, sdebug_max_queue); 5641 if (unlikely(k >= sdebug_max_queue)) { 5642 spin_unlock_irqrestore(&sqp->qc_lock, iflags); 5643 if (scsi_result) 5644 goto respond_in_thread; 5645 scsi_result = device_qfull_result; 5646 if (SDEBUG_OPT_Q_NOISE & sdebug_opts) 5647 sdev_printk(KERN_INFO, sdp, "%s: max_queue=%d exceeded: TASK SET FULL\n", 5648 __func__, sdebug_max_queue); 5649 goto respond_in_thread; 5650 } 5651 set_bit(k, sqp->in_use_bm); 5652 atomic_inc(&devip->num_in_q); 5653 sqcp = &sqp->qc_arr[k]; 5654 sqcp->a_cmnd = cmnd; 5655 cmnd->host_scribble = (unsigned char *)sqcp; 5656 sd_dp = sqcp->sd_dp; 5657 spin_unlock_irqrestore(&sqp->qc_lock, iflags); 5658 5659 if (!sd_dp) { 5660 sd_dp = kzalloc(sizeof(*sd_dp), GFP_ATOMIC); 5661 if (!sd_dp) { 5662 atomic_dec(&devip->num_in_q); 5663 clear_bit(k, sqp->in_use_bm); 5664 return SCSI_MLQUEUE_HOST_BUSY; 5665 } 5666 new_sd_dp = true; 5667 } else { 5668 new_sd_dp = false; 5669 } 5670 5671 /* Set the hostwide tag */ 5672 if (sdebug_host_max_queue) 5673 sd_dp->hc_idx = get_tag(cmnd); 5674 5675 if (polled) 5676 ns_from_boot = ktime_get_boottime_ns(); 5677 5678 /* one of the resp_*() response functions is called here */ 5679 cmnd->result = pfp ? pfp(cmnd, devip) : 0; 5680 if (cmnd->result & SDEG_RES_IMMED_MASK) { 5681 cmnd->result &= ~SDEG_RES_IMMED_MASK; 5682 delta_jiff = ndelay = 0; 5683 } 5684 if (cmnd->result == 0 && scsi_result != 0) 5685 cmnd->result = scsi_result; 5686 if (cmnd->result == 0 && unlikely(sdebug_opts & SDEBUG_OPT_TRANSPORT_ERR)) { 5687 if (atomic_read(&sdeb_inject_pending)) { 5688 mk_sense_buffer(cmnd, ABORTED_COMMAND, TRANSPORT_PROBLEM, ACK_NAK_TO); 5689 atomic_set(&sdeb_inject_pending, 0); 5690 cmnd->result = check_condition_result; 5691 } 5692 } 5693 5694 if (unlikely(sdebug_verbose && cmnd->result)) 5695 sdev_printk(KERN_INFO, sdp, "%s: non-zero result=0x%x\n", 5696 __func__, cmnd->result); 5697 5698 if (delta_jiff > 0 || ndelay > 0) { 5699 ktime_t kt; 5700 5701 if (delta_jiff > 0) { 5702 u64 ns = jiffies_to_nsecs(delta_jiff); 5703 5704 if (sdebug_random && ns < U32_MAX) { 5705 ns = prandom_u32_max((u32)ns); 5706 } else if (sdebug_random) { 5707 ns >>= 12; /* scale to 4 usec precision */ 5708 if (ns < U32_MAX) /* over 4 hours max */ 5709 ns = prandom_u32_max((u32)ns); 5710 ns <<= 12; 5711 } 5712 kt = ns_to_ktime(ns); 5713 } else { /* ndelay has a 4.2 second max */ 5714 kt = sdebug_random ? prandom_u32_max((u32)ndelay) : 5715 (u32)ndelay; 5716 if (ndelay < INCLUSIVE_TIMING_MAX_NS) { 5717 u64 d = ktime_get_boottime_ns() - ns_from_boot; 5718 5719 if (kt <= d) { /* elapsed duration >= kt */ 5720 spin_lock_irqsave(&sqp->qc_lock, iflags); 5721 sqcp->a_cmnd = NULL; 5722 atomic_dec(&devip->num_in_q); 5723 clear_bit(k, sqp->in_use_bm); 5724 spin_unlock_irqrestore(&sqp->qc_lock, iflags); 5725 if (new_sd_dp) 5726 kfree(sd_dp); 5727 /* call scsi_done() from this thread */ 5728 scsi_done(cmnd); 5729 return 0; 5730 } 5731 /* otherwise reduce kt by elapsed time */ 5732 kt -= d; 5733 } 5734 } 5735 if (polled) { 5736 sd_dp->cmpl_ts = ktime_add(ns_to_ktime(ns_from_boot), kt); 5737 spin_lock_irqsave(&sqp->qc_lock, iflags); 5738 if (!sd_dp->init_poll) { 5739 sd_dp->init_poll = true; 5740 sqcp->sd_dp = sd_dp; 5741 sd_dp->sqa_idx = sqp - sdebug_q_arr; 5742 sd_dp->qc_idx = k; 5743 } 5744 WRITE_ONCE(sd_dp->defer_t, SDEB_DEFER_POLL); 5745 spin_unlock_irqrestore(&sqp->qc_lock, iflags); 5746 } else { 5747 if (!sd_dp->init_hrt) { 5748 sd_dp->init_hrt = true; 5749 sqcp->sd_dp = sd_dp; 5750 hrtimer_init(&sd_dp->hrt, CLOCK_MONOTONIC, 5751 HRTIMER_MODE_REL_PINNED); 5752 sd_dp->hrt.function = sdebug_q_cmd_hrt_complete; 5753 sd_dp->sqa_idx = sqp - sdebug_q_arr; 5754 sd_dp->qc_idx = k; 5755 } 5756 WRITE_ONCE(sd_dp->defer_t, SDEB_DEFER_HRT); 5757 /* schedule the invocation of scsi_done() for a later time */ 5758 hrtimer_start(&sd_dp->hrt, kt, HRTIMER_MODE_REL_PINNED); 5759 } 5760 if (sdebug_statistics) 5761 sd_dp->issuing_cpu = raw_smp_processor_id(); 5762 } else { /* jdelay < 0, use work queue */ 5763 if (unlikely((sdebug_opts & SDEBUG_OPT_CMD_ABORT) && 5764 atomic_read(&sdeb_inject_pending))) 5765 sd_dp->aborted = true; 5766 if (polled) { 5767 sd_dp->cmpl_ts = ns_to_ktime(ns_from_boot); 5768 spin_lock_irqsave(&sqp->qc_lock, iflags); 5769 if (!sd_dp->init_poll) { 5770 sd_dp->init_poll = true; 5771 sqcp->sd_dp = sd_dp; 5772 sd_dp->sqa_idx = sqp - sdebug_q_arr; 5773 sd_dp->qc_idx = k; 5774 } 5775 WRITE_ONCE(sd_dp->defer_t, SDEB_DEFER_POLL); 5776 spin_unlock_irqrestore(&sqp->qc_lock, iflags); 5777 } else { 5778 if (!sd_dp->init_wq) { 5779 sd_dp->init_wq = true; 5780 sqcp->sd_dp = sd_dp; 5781 sd_dp->sqa_idx = sqp - sdebug_q_arr; 5782 sd_dp->qc_idx = k; 5783 INIT_WORK(&sd_dp->ew.work, sdebug_q_cmd_wq_complete); 5784 } 5785 WRITE_ONCE(sd_dp->defer_t, SDEB_DEFER_WQ); 5786 schedule_work(&sd_dp->ew.work); 5787 } 5788 if (sdebug_statistics) 5789 sd_dp->issuing_cpu = raw_smp_processor_id(); 5790 if (unlikely(sd_dp->aborted)) { 5791 sdev_printk(KERN_INFO, sdp, "abort request tag %d\n", 5792 scsi_cmd_to_rq(cmnd)->tag); 5793 blk_abort_request(scsi_cmd_to_rq(cmnd)); 5794 atomic_set(&sdeb_inject_pending, 0); 5795 sd_dp->aborted = false; 5796 } 5797 } 5798 if (unlikely((SDEBUG_OPT_Q_NOISE & sdebug_opts) && scsi_result == device_qfull_result)) 5799 sdev_printk(KERN_INFO, sdp, "%s: num_in_q=%d +1, %s%s\n", __func__, 5800 num_in_q, (inject ? "<inject> " : ""), "status: TASK SET FULL"); 5801 return 0; 5802 5803 respond_in_thread: /* call back to mid-layer using invocation thread */ 5804 cmnd->result = pfp != NULL ? pfp(cmnd, devip) : 0; 5805 cmnd->result &= ~SDEG_RES_IMMED_MASK; 5806 if (cmnd->result == 0 && scsi_result != 0) 5807 cmnd->result = scsi_result; 5808 scsi_done(cmnd); 5809 return 0; 5810 } 5811 5812 /* Note: The following macros create attribute files in the 5813 /sys/module/scsi_debug/parameters directory. Unfortunately this 5814 driver is unaware of a change and cannot trigger auxiliary actions 5815 as it can when the corresponding attribute in the 5816 /sys/bus/pseudo/drivers/scsi_debug directory is changed. 5817 */ 5818 module_param_named(add_host, sdebug_add_host, int, S_IRUGO | S_IWUSR); 5819 module_param_named(ato, sdebug_ato, int, S_IRUGO); 5820 module_param_named(cdb_len, sdebug_cdb_len, int, 0644); 5821 module_param_named(clustering, sdebug_clustering, bool, S_IRUGO | S_IWUSR); 5822 module_param_named(delay, sdebug_jdelay, int, S_IRUGO | S_IWUSR); 5823 module_param_named(dev_size_mb, sdebug_dev_size_mb, int, S_IRUGO); 5824 module_param_named(dif, sdebug_dif, int, S_IRUGO); 5825 module_param_named(dix, sdebug_dix, int, S_IRUGO); 5826 module_param_named(dsense, sdebug_dsense, int, S_IRUGO | S_IWUSR); 5827 module_param_named(every_nth, sdebug_every_nth, int, S_IRUGO | S_IWUSR); 5828 module_param_named(fake_rw, sdebug_fake_rw, int, S_IRUGO | S_IWUSR); 5829 module_param_named(guard, sdebug_guard, uint, S_IRUGO); 5830 module_param_named(host_lock, sdebug_host_lock, bool, S_IRUGO | S_IWUSR); 5831 module_param_named(host_max_queue, sdebug_host_max_queue, int, S_IRUGO); 5832 module_param_string(inq_product, sdebug_inq_product_id, 5833 sizeof(sdebug_inq_product_id), S_IRUGO | S_IWUSR); 5834 module_param_string(inq_rev, sdebug_inq_product_rev, 5835 sizeof(sdebug_inq_product_rev), S_IRUGO | S_IWUSR); 5836 module_param_string(inq_vendor, sdebug_inq_vendor_id, 5837 sizeof(sdebug_inq_vendor_id), S_IRUGO | S_IWUSR); 5838 module_param_named(lbprz, sdebug_lbprz, int, S_IRUGO); 5839 module_param_named(lbpu, sdebug_lbpu, int, S_IRUGO); 5840 module_param_named(lbpws, sdebug_lbpws, int, S_IRUGO); 5841 module_param_named(lbpws10, sdebug_lbpws10, int, S_IRUGO); 5842 module_param_named(lowest_aligned, sdebug_lowest_aligned, int, S_IRUGO); 5843 module_param_named(lun_format, sdebug_lun_am_i, int, S_IRUGO | S_IWUSR); 5844 module_param_named(max_luns, sdebug_max_luns, int, S_IRUGO | S_IWUSR); 5845 module_param_named(max_queue, sdebug_max_queue, int, S_IRUGO | S_IWUSR); 5846 module_param_named(medium_error_count, sdebug_medium_error_count, int, 5847 S_IRUGO | S_IWUSR); 5848 module_param_named(medium_error_start, sdebug_medium_error_start, int, 5849 S_IRUGO | S_IWUSR); 5850 module_param_named(ndelay, sdebug_ndelay, int, S_IRUGO | S_IWUSR); 5851 module_param_named(no_lun_0, sdebug_no_lun_0, int, S_IRUGO | S_IWUSR); 5852 module_param_named(no_rwlock, sdebug_no_rwlock, bool, S_IRUGO | S_IWUSR); 5853 module_param_named(no_uld, sdebug_no_uld, int, S_IRUGO); 5854 module_param_named(num_parts, sdebug_num_parts, int, S_IRUGO); 5855 module_param_named(num_tgts, sdebug_num_tgts, int, S_IRUGO | S_IWUSR); 5856 module_param_named(opt_blks, sdebug_opt_blks, int, S_IRUGO); 5857 module_param_named(opt_xferlen_exp, sdebug_opt_xferlen_exp, int, S_IRUGO); 5858 module_param_named(opts, sdebug_opts, int, S_IRUGO | S_IWUSR); 5859 module_param_named(per_host_store, sdebug_per_host_store, bool, 5860 S_IRUGO | S_IWUSR); 5861 module_param_named(physblk_exp, sdebug_physblk_exp, int, S_IRUGO); 5862 module_param_named(ptype, sdebug_ptype, int, S_IRUGO | S_IWUSR); 5863 module_param_named(random, sdebug_random, bool, S_IRUGO | S_IWUSR); 5864 module_param_named(removable, sdebug_removable, bool, S_IRUGO | S_IWUSR); 5865 module_param_named(scsi_level, sdebug_scsi_level, int, S_IRUGO); 5866 module_param_named(sector_size, sdebug_sector_size, int, S_IRUGO); 5867 module_param_named(statistics, sdebug_statistics, bool, S_IRUGO | S_IWUSR); 5868 module_param_named(strict, sdebug_strict, bool, S_IRUGO | S_IWUSR); 5869 module_param_named(submit_queues, submit_queues, int, S_IRUGO); 5870 module_param_named(poll_queues, poll_queues, int, S_IRUGO); 5871 module_param_named(tur_ms_to_ready, sdeb_tur_ms_to_ready, int, S_IRUGO); 5872 module_param_named(unmap_alignment, sdebug_unmap_alignment, int, S_IRUGO); 5873 module_param_named(unmap_granularity, sdebug_unmap_granularity, int, S_IRUGO); 5874 module_param_named(unmap_max_blocks, sdebug_unmap_max_blocks, int, S_IRUGO); 5875 module_param_named(unmap_max_desc, sdebug_unmap_max_desc, int, S_IRUGO); 5876 module_param_named(uuid_ctl, sdebug_uuid_ctl, int, S_IRUGO); 5877 module_param_named(virtual_gb, sdebug_virtual_gb, int, S_IRUGO | S_IWUSR); 5878 module_param_named(vpd_use_hostno, sdebug_vpd_use_hostno, int, 5879 S_IRUGO | S_IWUSR); 5880 module_param_named(wp, sdebug_wp, bool, S_IRUGO | S_IWUSR); 5881 module_param_named(write_same_length, sdebug_write_same_length, int, 5882 S_IRUGO | S_IWUSR); 5883 module_param_named(zbc, sdeb_zbc_model_s, charp, S_IRUGO); 5884 module_param_named(zone_cap_mb, sdeb_zbc_zone_cap_mb, int, S_IRUGO); 5885 module_param_named(zone_max_open, sdeb_zbc_max_open, int, S_IRUGO); 5886 module_param_named(zone_nr_conv, sdeb_zbc_nr_conv, int, S_IRUGO); 5887 module_param_named(zone_size_mb, sdeb_zbc_zone_size_mb, int, S_IRUGO); 5888 5889 MODULE_AUTHOR("Eric Youngdale + Douglas Gilbert"); 5890 MODULE_DESCRIPTION("SCSI debug adapter driver"); 5891 MODULE_LICENSE("GPL"); 5892 MODULE_VERSION(SDEBUG_VERSION); 5893 5894 MODULE_PARM_DESC(add_host, "add n hosts, in sysfs if negative remove host(s) (def=1)"); 5895 MODULE_PARM_DESC(ato, "application tag ownership: 0=disk 1=host (def=1)"); 5896 MODULE_PARM_DESC(cdb_len, "suggest CDB lengths to drivers (def=10)"); 5897 MODULE_PARM_DESC(clustering, "when set enables larger transfers (def=0)"); 5898 MODULE_PARM_DESC(delay, "response delay (def=1 jiffy); 0:imm, -1,-2:tiny"); 5899 MODULE_PARM_DESC(dev_size_mb, "size in MiB of ram shared by devs(def=8)"); 5900 MODULE_PARM_DESC(dif, "data integrity field type: 0-3 (def=0)"); 5901 MODULE_PARM_DESC(dix, "data integrity extensions mask (def=0)"); 5902 MODULE_PARM_DESC(dsense, "use descriptor sense format(def=0 -> fixed)"); 5903 MODULE_PARM_DESC(every_nth, "timeout every nth command(def=0)"); 5904 MODULE_PARM_DESC(fake_rw, "fake reads/writes instead of copying (def=0)"); 5905 MODULE_PARM_DESC(guard, "protection checksum: 0=crc, 1=ip (def=0)"); 5906 MODULE_PARM_DESC(host_lock, "host_lock is ignored (def=0)"); 5907 MODULE_PARM_DESC(host_max_queue, 5908 "host max # of queued cmds (0 to max(def) [max_queue fixed equal for !0])"); 5909 MODULE_PARM_DESC(inq_product, "SCSI INQUIRY product string (def=\"scsi_debug\")"); 5910 MODULE_PARM_DESC(inq_rev, "SCSI INQUIRY revision string (def=\"" 5911 SDEBUG_VERSION "\")"); 5912 MODULE_PARM_DESC(inq_vendor, "SCSI INQUIRY vendor string (def=\"Linux\")"); 5913 MODULE_PARM_DESC(lbprz, 5914 "on read unmapped LBs return 0 when 1 (def), return 0xff when 2"); 5915 MODULE_PARM_DESC(lbpu, "enable LBP, support UNMAP command (def=0)"); 5916 MODULE_PARM_DESC(lbpws, "enable LBP, support WRITE SAME(16) with UNMAP bit (def=0)"); 5917 MODULE_PARM_DESC(lbpws10, "enable LBP, support WRITE SAME(10) with UNMAP bit (def=0)"); 5918 MODULE_PARM_DESC(lowest_aligned, "lowest aligned lba (def=0)"); 5919 MODULE_PARM_DESC(lun_format, "LUN format: 0->peripheral (def); 1 --> flat address method"); 5920 MODULE_PARM_DESC(max_luns, "number of LUNs per target to simulate(def=1)"); 5921 MODULE_PARM_DESC(max_queue, "max number of queued commands (1 to max(def))"); 5922 MODULE_PARM_DESC(medium_error_count, "count of sectors to return follow on MEDIUM error"); 5923 MODULE_PARM_DESC(medium_error_start, "starting sector number to return MEDIUM error"); 5924 MODULE_PARM_DESC(ndelay, "response delay in nanoseconds (def=0 -> ignore)"); 5925 MODULE_PARM_DESC(no_lun_0, "no LU number 0 (def=0 -> have lun 0)"); 5926 MODULE_PARM_DESC(no_rwlock, "don't protect user data reads+writes (def=0)"); 5927 MODULE_PARM_DESC(no_uld, "stop ULD (e.g. sd driver) attaching (def=0))"); 5928 MODULE_PARM_DESC(num_parts, "number of partitions(def=0)"); 5929 MODULE_PARM_DESC(num_tgts, "number of targets per host to simulate(def=1)"); 5930 MODULE_PARM_DESC(opt_blks, "optimal transfer length in blocks (def=1024)"); 5931 MODULE_PARM_DESC(opt_xferlen_exp, "optimal transfer length granularity exponent (def=physblk_exp)"); 5932 MODULE_PARM_DESC(opts, "1->noise, 2->medium_err, 4->timeout, 8->recovered_err... (def=0)"); 5933 MODULE_PARM_DESC(per_host_store, "If set, next positive add_host will get new store (def=0)"); 5934 MODULE_PARM_DESC(physblk_exp, "physical block exponent (def=0)"); 5935 MODULE_PARM_DESC(poll_queues, "support for iouring iopoll queues (1 to max(submit_queues - 1))"); 5936 MODULE_PARM_DESC(ptype, "SCSI peripheral type(def=0[disk])"); 5937 MODULE_PARM_DESC(random, "If set, uniformly randomize command duration between 0 and delay_in_ns"); 5938 MODULE_PARM_DESC(removable, "claim to have removable media (def=0)"); 5939 MODULE_PARM_DESC(scsi_level, "SCSI level to simulate(def=7[SPC-5])"); 5940 MODULE_PARM_DESC(sector_size, "logical block size in bytes (def=512)"); 5941 MODULE_PARM_DESC(statistics, "collect statistics on commands, queues (def=0)"); 5942 MODULE_PARM_DESC(strict, "stricter checks: reserved field in cdb (def=0)"); 5943 MODULE_PARM_DESC(submit_queues, "support for block multi-queue (def=1)"); 5944 MODULE_PARM_DESC(tur_ms_to_ready, "TEST UNIT READY millisecs before initial good status (def=0)"); 5945 MODULE_PARM_DESC(unmap_alignment, "lowest aligned thin provisioning lba (def=0)"); 5946 MODULE_PARM_DESC(unmap_granularity, "thin provisioning granularity in blocks (def=1)"); 5947 MODULE_PARM_DESC(unmap_max_blocks, "max # of blocks can be unmapped in one cmd (def=0xffffffff)"); 5948 MODULE_PARM_DESC(unmap_max_desc, "max # of ranges that can be unmapped in one cmd (def=256)"); 5949 MODULE_PARM_DESC(uuid_ctl, 5950 "1->use uuid for lu name, 0->don't, 2->all use same (def=0)"); 5951 MODULE_PARM_DESC(virtual_gb, "virtual gigabyte (GiB) size (def=0 -> use dev_size_mb)"); 5952 MODULE_PARM_DESC(vpd_use_hostno, "0 -> dev ids ignore hostno (def=1 -> unique dev ids)"); 5953 MODULE_PARM_DESC(wp, "Write Protect (def=0)"); 5954 MODULE_PARM_DESC(write_same_length, "Maximum blocks per WRITE SAME cmd (def=0xffff)"); 5955 MODULE_PARM_DESC(zbc, "'none' [0]; 'aware' [1]; 'managed' [2] (def=0). Can have 'host-' prefix"); 5956 MODULE_PARM_DESC(zone_cap_mb, "Zone capacity in MiB (def=zone size)"); 5957 MODULE_PARM_DESC(zone_max_open, "Maximum number of open zones; [0] for no limit (def=auto)"); 5958 MODULE_PARM_DESC(zone_nr_conv, "Number of conventional zones (def=1)"); 5959 MODULE_PARM_DESC(zone_size_mb, "Zone size in MiB (def=auto)"); 5960 5961 #define SDEBUG_INFO_LEN 256 5962 static char sdebug_info[SDEBUG_INFO_LEN]; 5963 5964 static const char *scsi_debug_info(struct Scsi_Host *shp) 5965 { 5966 int k; 5967 5968 k = scnprintf(sdebug_info, SDEBUG_INFO_LEN, "%s: version %s [%s]\n", 5969 my_name, SDEBUG_VERSION, sdebug_version_date); 5970 if (k >= (SDEBUG_INFO_LEN - 1)) 5971 return sdebug_info; 5972 scnprintf(sdebug_info + k, SDEBUG_INFO_LEN - k, 5973 " dev_size_mb=%d, opts=0x%x, submit_queues=%d, %s=%d", 5974 sdebug_dev_size_mb, sdebug_opts, submit_queues, 5975 "statistics", (int)sdebug_statistics); 5976 return sdebug_info; 5977 } 5978 5979 /* 'echo <val> > /proc/scsi/scsi_debug/<host_id>' writes to opts */ 5980 static int scsi_debug_write_info(struct Scsi_Host *host, char *buffer, 5981 int length) 5982 { 5983 char arr[16]; 5984 int opts; 5985 int minLen = length > 15 ? 15 : length; 5986 5987 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) 5988 return -EACCES; 5989 memcpy(arr, buffer, minLen); 5990 arr[minLen] = '\0'; 5991 if (1 != sscanf(arr, "%d", &opts)) 5992 return -EINVAL; 5993 sdebug_opts = opts; 5994 sdebug_verbose = !!(SDEBUG_OPT_NOISE & opts); 5995 sdebug_any_injecting_opt = !!(SDEBUG_OPT_ALL_INJECTING & opts); 5996 if (sdebug_every_nth != 0) 5997 tweak_cmnd_count(); 5998 return length; 5999 } 6000 6001 /* Output seen with 'cat /proc/scsi/scsi_debug/<host_id>'. It will be the 6002 * same for each scsi_debug host (if more than one). Some of the counters 6003 * output are not atomics so might be inaccurate in a busy system. */ 6004 static int scsi_debug_show_info(struct seq_file *m, struct Scsi_Host *host) 6005 { 6006 int f, j, l; 6007 struct sdebug_queue *sqp; 6008 struct sdebug_host_info *sdhp; 6009 6010 seq_printf(m, "scsi_debug adapter driver, version %s [%s]\n", 6011 SDEBUG_VERSION, sdebug_version_date); 6012 seq_printf(m, "num_tgts=%d, %ssize=%d MB, opts=0x%x, every_nth=%d\n", 6013 sdebug_num_tgts, "shared (ram) ", sdebug_dev_size_mb, 6014 sdebug_opts, sdebug_every_nth); 6015 seq_printf(m, "delay=%d, ndelay=%d, max_luns=%d, sector_size=%d %s\n", 6016 sdebug_jdelay, sdebug_ndelay, sdebug_max_luns, 6017 sdebug_sector_size, "bytes"); 6018 seq_printf(m, "cylinders=%d, heads=%d, sectors=%d, command aborts=%d\n", 6019 sdebug_cylinders_per, sdebug_heads, sdebug_sectors_per, 6020 num_aborts); 6021 seq_printf(m, "RESETs: device=%d, target=%d, bus=%d, host=%d\n", 6022 num_dev_resets, num_target_resets, num_bus_resets, 6023 num_host_resets); 6024 seq_printf(m, "dix_reads=%d, dix_writes=%d, dif_errors=%d\n", 6025 dix_reads, dix_writes, dif_errors); 6026 seq_printf(m, "usec_in_jiffy=%lu, statistics=%d\n", TICK_NSEC / 1000, 6027 sdebug_statistics); 6028 seq_printf(m, "cmnd_count=%d, completions=%d, %s=%d, a_tsf=%d, mq_polls=%d\n", 6029 atomic_read(&sdebug_cmnd_count), 6030 atomic_read(&sdebug_completions), 6031 "miss_cpus", atomic_read(&sdebug_miss_cpus), 6032 atomic_read(&sdebug_a_tsf), 6033 atomic_read(&sdeb_mq_poll_count)); 6034 6035 seq_printf(m, "submit_queues=%d\n", submit_queues); 6036 for (j = 0, sqp = sdebug_q_arr; j < submit_queues; ++j, ++sqp) { 6037 seq_printf(m, " queue %d:\n", j); 6038 f = find_first_bit(sqp->in_use_bm, sdebug_max_queue); 6039 if (f != sdebug_max_queue) { 6040 l = find_last_bit(sqp->in_use_bm, sdebug_max_queue); 6041 seq_printf(m, " in_use_bm BUSY: %s: %d,%d\n", 6042 "first,last bits", f, l); 6043 } 6044 } 6045 6046 seq_printf(m, "this host_no=%d\n", host->host_no); 6047 if (!xa_empty(per_store_ap)) { 6048 bool niu; 6049 int idx; 6050 unsigned long l_idx; 6051 struct sdeb_store_info *sip; 6052 6053 seq_puts(m, "\nhost list:\n"); 6054 j = 0; 6055 list_for_each_entry(sdhp, &sdebug_host_list, host_list) { 6056 idx = sdhp->si_idx; 6057 seq_printf(m, " %d: host_no=%d, si_idx=%d\n", j, 6058 sdhp->shost->host_no, idx); 6059 ++j; 6060 } 6061 seq_printf(m, "\nper_store array [most_recent_idx=%d]:\n", 6062 sdeb_most_recent_idx); 6063 j = 0; 6064 xa_for_each(per_store_ap, l_idx, sip) { 6065 niu = xa_get_mark(per_store_ap, l_idx, 6066 SDEB_XA_NOT_IN_USE); 6067 idx = (int)l_idx; 6068 seq_printf(m, " %d: idx=%d%s\n", j, idx, 6069 (niu ? " not_in_use" : "")); 6070 ++j; 6071 } 6072 } 6073 return 0; 6074 } 6075 6076 static ssize_t delay_show(struct device_driver *ddp, char *buf) 6077 { 6078 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_jdelay); 6079 } 6080 /* Returns -EBUSY if jdelay is being changed and commands are queued. The unit 6081 * of delay is jiffies. 6082 */ 6083 static ssize_t delay_store(struct device_driver *ddp, const char *buf, 6084 size_t count) 6085 { 6086 int jdelay, res; 6087 6088 if (count > 0 && sscanf(buf, "%d", &jdelay) == 1) { 6089 res = count; 6090 if (sdebug_jdelay != jdelay) { 6091 int j, k; 6092 struct sdebug_queue *sqp; 6093 6094 block_unblock_all_queues(true); 6095 for (j = 0, sqp = sdebug_q_arr; j < submit_queues; 6096 ++j, ++sqp) { 6097 k = find_first_bit(sqp->in_use_bm, 6098 sdebug_max_queue); 6099 if (k != sdebug_max_queue) { 6100 res = -EBUSY; /* queued commands */ 6101 break; 6102 } 6103 } 6104 if (res > 0) { 6105 sdebug_jdelay = jdelay; 6106 sdebug_ndelay = 0; 6107 } 6108 block_unblock_all_queues(false); 6109 } 6110 return res; 6111 } 6112 return -EINVAL; 6113 } 6114 static DRIVER_ATTR_RW(delay); 6115 6116 static ssize_t ndelay_show(struct device_driver *ddp, char *buf) 6117 { 6118 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_ndelay); 6119 } 6120 /* Returns -EBUSY if ndelay is being changed and commands are queued */ 6121 /* If > 0 and accepted then sdebug_jdelay is set to JDELAY_OVERRIDDEN */ 6122 static ssize_t ndelay_store(struct device_driver *ddp, const char *buf, 6123 size_t count) 6124 { 6125 int ndelay, res; 6126 6127 if ((count > 0) && (1 == sscanf(buf, "%d", &ndelay)) && 6128 (ndelay >= 0) && (ndelay < (1000 * 1000 * 1000))) { 6129 res = count; 6130 if (sdebug_ndelay != ndelay) { 6131 int j, k; 6132 struct sdebug_queue *sqp; 6133 6134 block_unblock_all_queues(true); 6135 for (j = 0, sqp = sdebug_q_arr; j < submit_queues; 6136 ++j, ++sqp) { 6137 k = find_first_bit(sqp->in_use_bm, 6138 sdebug_max_queue); 6139 if (k != sdebug_max_queue) { 6140 res = -EBUSY; /* queued commands */ 6141 break; 6142 } 6143 } 6144 if (res > 0) { 6145 sdebug_ndelay = ndelay; 6146 sdebug_jdelay = ndelay ? JDELAY_OVERRIDDEN 6147 : DEF_JDELAY; 6148 } 6149 block_unblock_all_queues(false); 6150 } 6151 return res; 6152 } 6153 return -EINVAL; 6154 } 6155 static DRIVER_ATTR_RW(ndelay); 6156 6157 static ssize_t opts_show(struct device_driver *ddp, char *buf) 6158 { 6159 return scnprintf(buf, PAGE_SIZE, "0x%x\n", sdebug_opts); 6160 } 6161 6162 static ssize_t opts_store(struct device_driver *ddp, const char *buf, 6163 size_t count) 6164 { 6165 int opts; 6166 char work[20]; 6167 6168 if (sscanf(buf, "%10s", work) == 1) { 6169 if (strncasecmp(work, "0x", 2) == 0) { 6170 if (kstrtoint(work + 2, 16, &opts) == 0) 6171 goto opts_done; 6172 } else { 6173 if (kstrtoint(work, 10, &opts) == 0) 6174 goto opts_done; 6175 } 6176 } 6177 return -EINVAL; 6178 opts_done: 6179 sdebug_opts = opts; 6180 sdebug_verbose = !!(SDEBUG_OPT_NOISE & opts); 6181 sdebug_any_injecting_opt = !!(SDEBUG_OPT_ALL_INJECTING & opts); 6182 tweak_cmnd_count(); 6183 return count; 6184 } 6185 static DRIVER_ATTR_RW(opts); 6186 6187 static ssize_t ptype_show(struct device_driver *ddp, char *buf) 6188 { 6189 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_ptype); 6190 } 6191 static ssize_t ptype_store(struct device_driver *ddp, const char *buf, 6192 size_t count) 6193 { 6194 int n; 6195 6196 /* Cannot change from or to TYPE_ZBC with sysfs */ 6197 if (sdebug_ptype == TYPE_ZBC) 6198 return -EINVAL; 6199 6200 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) { 6201 if (n == TYPE_ZBC) 6202 return -EINVAL; 6203 sdebug_ptype = n; 6204 return count; 6205 } 6206 return -EINVAL; 6207 } 6208 static DRIVER_ATTR_RW(ptype); 6209 6210 static ssize_t dsense_show(struct device_driver *ddp, char *buf) 6211 { 6212 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_dsense); 6213 } 6214 static ssize_t dsense_store(struct device_driver *ddp, const char *buf, 6215 size_t count) 6216 { 6217 int n; 6218 6219 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) { 6220 sdebug_dsense = n; 6221 return count; 6222 } 6223 return -EINVAL; 6224 } 6225 static DRIVER_ATTR_RW(dsense); 6226 6227 static ssize_t fake_rw_show(struct device_driver *ddp, char *buf) 6228 { 6229 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_fake_rw); 6230 } 6231 static ssize_t fake_rw_store(struct device_driver *ddp, const char *buf, 6232 size_t count) 6233 { 6234 int n, idx; 6235 6236 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) { 6237 bool want_store = (n == 0); 6238 struct sdebug_host_info *sdhp; 6239 6240 n = (n > 0); 6241 sdebug_fake_rw = (sdebug_fake_rw > 0); 6242 if (sdebug_fake_rw == n) 6243 return count; /* not transitioning so do nothing */ 6244 6245 if (want_store) { /* 1 --> 0 transition, set up store */ 6246 if (sdeb_first_idx < 0) { 6247 idx = sdebug_add_store(); 6248 if (idx < 0) 6249 return idx; 6250 } else { 6251 idx = sdeb_first_idx; 6252 xa_clear_mark(per_store_ap, idx, 6253 SDEB_XA_NOT_IN_USE); 6254 } 6255 /* make all hosts use same store */ 6256 list_for_each_entry(sdhp, &sdebug_host_list, 6257 host_list) { 6258 if (sdhp->si_idx != idx) { 6259 xa_set_mark(per_store_ap, sdhp->si_idx, 6260 SDEB_XA_NOT_IN_USE); 6261 sdhp->si_idx = idx; 6262 } 6263 } 6264 sdeb_most_recent_idx = idx; 6265 } else { /* 0 --> 1 transition is trigger for shrink */ 6266 sdebug_erase_all_stores(true /* apart from first */); 6267 } 6268 sdebug_fake_rw = n; 6269 return count; 6270 } 6271 return -EINVAL; 6272 } 6273 static DRIVER_ATTR_RW(fake_rw); 6274 6275 static ssize_t no_lun_0_show(struct device_driver *ddp, char *buf) 6276 { 6277 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_no_lun_0); 6278 } 6279 static ssize_t no_lun_0_store(struct device_driver *ddp, const char *buf, 6280 size_t count) 6281 { 6282 int n; 6283 6284 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) { 6285 sdebug_no_lun_0 = n; 6286 return count; 6287 } 6288 return -EINVAL; 6289 } 6290 static DRIVER_ATTR_RW(no_lun_0); 6291 6292 static ssize_t num_tgts_show(struct device_driver *ddp, char *buf) 6293 { 6294 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_num_tgts); 6295 } 6296 static ssize_t num_tgts_store(struct device_driver *ddp, const char *buf, 6297 size_t count) 6298 { 6299 int n; 6300 6301 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) { 6302 sdebug_num_tgts = n; 6303 sdebug_max_tgts_luns(); 6304 return count; 6305 } 6306 return -EINVAL; 6307 } 6308 static DRIVER_ATTR_RW(num_tgts); 6309 6310 static ssize_t dev_size_mb_show(struct device_driver *ddp, char *buf) 6311 { 6312 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_dev_size_mb); 6313 } 6314 static DRIVER_ATTR_RO(dev_size_mb); 6315 6316 static ssize_t per_host_store_show(struct device_driver *ddp, char *buf) 6317 { 6318 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_per_host_store); 6319 } 6320 6321 static ssize_t per_host_store_store(struct device_driver *ddp, const char *buf, 6322 size_t count) 6323 { 6324 bool v; 6325 6326 if (kstrtobool(buf, &v)) 6327 return -EINVAL; 6328 6329 sdebug_per_host_store = v; 6330 return count; 6331 } 6332 static DRIVER_ATTR_RW(per_host_store); 6333 6334 static ssize_t num_parts_show(struct device_driver *ddp, char *buf) 6335 { 6336 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_num_parts); 6337 } 6338 static DRIVER_ATTR_RO(num_parts); 6339 6340 static ssize_t every_nth_show(struct device_driver *ddp, char *buf) 6341 { 6342 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_every_nth); 6343 } 6344 static ssize_t every_nth_store(struct device_driver *ddp, const char *buf, 6345 size_t count) 6346 { 6347 int nth; 6348 char work[20]; 6349 6350 if (sscanf(buf, "%10s", work) == 1) { 6351 if (strncasecmp(work, "0x", 2) == 0) { 6352 if (kstrtoint(work + 2, 16, &nth) == 0) 6353 goto every_nth_done; 6354 } else { 6355 if (kstrtoint(work, 10, &nth) == 0) 6356 goto every_nth_done; 6357 } 6358 } 6359 return -EINVAL; 6360 6361 every_nth_done: 6362 sdebug_every_nth = nth; 6363 if (nth && !sdebug_statistics) { 6364 pr_info("every_nth needs statistics=1, set it\n"); 6365 sdebug_statistics = true; 6366 } 6367 tweak_cmnd_count(); 6368 return count; 6369 } 6370 static DRIVER_ATTR_RW(every_nth); 6371 6372 static ssize_t lun_format_show(struct device_driver *ddp, char *buf) 6373 { 6374 return scnprintf(buf, PAGE_SIZE, "%d\n", (int)sdebug_lun_am); 6375 } 6376 static ssize_t lun_format_store(struct device_driver *ddp, const char *buf, 6377 size_t count) 6378 { 6379 int n; 6380 bool changed; 6381 6382 if (kstrtoint(buf, 0, &n)) 6383 return -EINVAL; 6384 if (n >= 0) { 6385 if (n > (int)SAM_LUN_AM_FLAT) { 6386 pr_warn("only LUN address methods 0 and 1 are supported\n"); 6387 return -EINVAL; 6388 } 6389 changed = ((int)sdebug_lun_am != n); 6390 sdebug_lun_am = n; 6391 if (changed && sdebug_scsi_level >= 5) { /* >= SPC-3 */ 6392 struct sdebug_host_info *sdhp; 6393 struct sdebug_dev_info *dp; 6394 6395 spin_lock(&sdebug_host_list_lock); 6396 list_for_each_entry(sdhp, &sdebug_host_list, host_list) { 6397 list_for_each_entry(dp, &sdhp->dev_info_list, dev_list) { 6398 set_bit(SDEBUG_UA_LUNS_CHANGED, dp->uas_bm); 6399 } 6400 } 6401 spin_unlock(&sdebug_host_list_lock); 6402 } 6403 return count; 6404 } 6405 return -EINVAL; 6406 } 6407 static DRIVER_ATTR_RW(lun_format); 6408 6409 static ssize_t max_luns_show(struct device_driver *ddp, char *buf) 6410 { 6411 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_max_luns); 6412 } 6413 static ssize_t max_luns_store(struct device_driver *ddp, const char *buf, 6414 size_t count) 6415 { 6416 int n; 6417 bool changed; 6418 6419 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) { 6420 if (n > 256) { 6421 pr_warn("max_luns can be no more than 256\n"); 6422 return -EINVAL; 6423 } 6424 changed = (sdebug_max_luns != n); 6425 sdebug_max_luns = n; 6426 sdebug_max_tgts_luns(); 6427 if (changed && (sdebug_scsi_level >= 5)) { /* >= SPC-3 */ 6428 struct sdebug_host_info *sdhp; 6429 struct sdebug_dev_info *dp; 6430 6431 spin_lock(&sdebug_host_list_lock); 6432 list_for_each_entry(sdhp, &sdebug_host_list, 6433 host_list) { 6434 list_for_each_entry(dp, &sdhp->dev_info_list, 6435 dev_list) { 6436 set_bit(SDEBUG_UA_LUNS_CHANGED, 6437 dp->uas_bm); 6438 } 6439 } 6440 spin_unlock(&sdebug_host_list_lock); 6441 } 6442 return count; 6443 } 6444 return -EINVAL; 6445 } 6446 static DRIVER_ATTR_RW(max_luns); 6447 6448 static ssize_t max_queue_show(struct device_driver *ddp, char *buf) 6449 { 6450 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_max_queue); 6451 } 6452 /* N.B. max_queue can be changed while there are queued commands. In flight 6453 * commands beyond the new max_queue will be completed. */ 6454 static ssize_t max_queue_store(struct device_driver *ddp, const char *buf, 6455 size_t count) 6456 { 6457 int j, n, k, a; 6458 struct sdebug_queue *sqp; 6459 6460 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n > 0) && 6461 (n <= SDEBUG_CANQUEUE) && 6462 (sdebug_host_max_queue == 0)) { 6463 block_unblock_all_queues(true); 6464 k = 0; 6465 for (j = 0, sqp = sdebug_q_arr; j < submit_queues; 6466 ++j, ++sqp) { 6467 a = find_last_bit(sqp->in_use_bm, SDEBUG_CANQUEUE); 6468 if (a > k) 6469 k = a; 6470 } 6471 sdebug_max_queue = n; 6472 if (k == SDEBUG_CANQUEUE) 6473 atomic_set(&retired_max_queue, 0); 6474 else if (k >= n) 6475 atomic_set(&retired_max_queue, k + 1); 6476 else 6477 atomic_set(&retired_max_queue, 0); 6478 block_unblock_all_queues(false); 6479 return count; 6480 } 6481 return -EINVAL; 6482 } 6483 static DRIVER_ATTR_RW(max_queue); 6484 6485 static ssize_t host_max_queue_show(struct device_driver *ddp, char *buf) 6486 { 6487 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_host_max_queue); 6488 } 6489 6490 static ssize_t no_rwlock_show(struct device_driver *ddp, char *buf) 6491 { 6492 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_no_rwlock); 6493 } 6494 6495 static ssize_t no_rwlock_store(struct device_driver *ddp, const char *buf, size_t count) 6496 { 6497 bool v; 6498 6499 if (kstrtobool(buf, &v)) 6500 return -EINVAL; 6501 6502 sdebug_no_rwlock = v; 6503 return count; 6504 } 6505 static DRIVER_ATTR_RW(no_rwlock); 6506 6507 /* 6508 * Since this is used for .can_queue, and we get the hc_idx tag from the bitmap 6509 * in range [0, sdebug_host_max_queue), we can't change it. 6510 */ 6511 static DRIVER_ATTR_RO(host_max_queue); 6512 6513 static ssize_t no_uld_show(struct device_driver *ddp, char *buf) 6514 { 6515 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_no_uld); 6516 } 6517 static DRIVER_ATTR_RO(no_uld); 6518 6519 static ssize_t scsi_level_show(struct device_driver *ddp, char *buf) 6520 { 6521 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_scsi_level); 6522 } 6523 static DRIVER_ATTR_RO(scsi_level); 6524 6525 static ssize_t virtual_gb_show(struct device_driver *ddp, char *buf) 6526 { 6527 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_virtual_gb); 6528 } 6529 static ssize_t virtual_gb_store(struct device_driver *ddp, const char *buf, 6530 size_t count) 6531 { 6532 int n; 6533 bool changed; 6534 6535 /* Ignore capacity change for ZBC drives for now */ 6536 if (sdeb_zbc_in_use) 6537 return -ENOTSUPP; 6538 6539 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) { 6540 changed = (sdebug_virtual_gb != n); 6541 sdebug_virtual_gb = n; 6542 sdebug_capacity = get_sdebug_capacity(); 6543 if (changed) { 6544 struct sdebug_host_info *sdhp; 6545 struct sdebug_dev_info *dp; 6546 6547 spin_lock(&sdebug_host_list_lock); 6548 list_for_each_entry(sdhp, &sdebug_host_list, 6549 host_list) { 6550 list_for_each_entry(dp, &sdhp->dev_info_list, 6551 dev_list) { 6552 set_bit(SDEBUG_UA_CAPACITY_CHANGED, 6553 dp->uas_bm); 6554 } 6555 } 6556 spin_unlock(&sdebug_host_list_lock); 6557 } 6558 return count; 6559 } 6560 return -EINVAL; 6561 } 6562 static DRIVER_ATTR_RW(virtual_gb); 6563 6564 static ssize_t add_host_show(struct device_driver *ddp, char *buf) 6565 { 6566 /* absolute number of hosts currently active is what is shown */ 6567 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_num_hosts); 6568 } 6569 6570 static ssize_t add_host_store(struct device_driver *ddp, const char *buf, 6571 size_t count) 6572 { 6573 bool found; 6574 unsigned long idx; 6575 struct sdeb_store_info *sip; 6576 bool want_phs = (sdebug_fake_rw == 0) && sdebug_per_host_store; 6577 int delta_hosts; 6578 6579 if (sscanf(buf, "%d", &delta_hosts) != 1) 6580 return -EINVAL; 6581 if (delta_hosts > 0) { 6582 do { 6583 found = false; 6584 if (want_phs) { 6585 xa_for_each_marked(per_store_ap, idx, sip, 6586 SDEB_XA_NOT_IN_USE) { 6587 sdeb_most_recent_idx = (int)idx; 6588 found = true; 6589 break; 6590 } 6591 if (found) /* re-use case */ 6592 sdebug_add_host_helper((int)idx); 6593 else 6594 sdebug_do_add_host(true); 6595 } else { 6596 sdebug_do_add_host(false); 6597 } 6598 } while (--delta_hosts); 6599 } else if (delta_hosts < 0) { 6600 do { 6601 sdebug_do_remove_host(false); 6602 } while (++delta_hosts); 6603 } 6604 return count; 6605 } 6606 static DRIVER_ATTR_RW(add_host); 6607 6608 static ssize_t vpd_use_hostno_show(struct device_driver *ddp, char *buf) 6609 { 6610 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_vpd_use_hostno); 6611 } 6612 static ssize_t vpd_use_hostno_store(struct device_driver *ddp, const char *buf, 6613 size_t count) 6614 { 6615 int n; 6616 6617 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) { 6618 sdebug_vpd_use_hostno = n; 6619 return count; 6620 } 6621 return -EINVAL; 6622 } 6623 static DRIVER_ATTR_RW(vpd_use_hostno); 6624 6625 static ssize_t statistics_show(struct device_driver *ddp, char *buf) 6626 { 6627 return scnprintf(buf, PAGE_SIZE, "%d\n", (int)sdebug_statistics); 6628 } 6629 static ssize_t statistics_store(struct device_driver *ddp, const char *buf, 6630 size_t count) 6631 { 6632 int n; 6633 6634 if ((count > 0) && (sscanf(buf, "%d", &n) == 1) && (n >= 0)) { 6635 if (n > 0) 6636 sdebug_statistics = true; 6637 else { 6638 clear_queue_stats(); 6639 sdebug_statistics = false; 6640 } 6641 return count; 6642 } 6643 return -EINVAL; 6644 } 6645 static DRIVER_ATTR_RW(statistics); 6646 6647 static ssize_t sector_size_show(struct device_driver *ddp, char *buf) 6648 { 6649 return scnprintf(buf, PAGE_SIZE, "%u\n", sdebug_sector_size); 6650 } 6651 static DRIVER_ATTR_RO(sector_size); 6652 6653 static ssize_t submit_queues_show(struct device_driver *ddp, char *buf) 6654 { 6655 return scnprintf(buf, PAGE_SIZE, "%d\n", submit_queues); 6656 } 6657 static DRIVER_ATTR_RO(submit_queues); 6658 6659 static ssize_t dix_show(struct device_driver *ddp, char *buf) 6660 { 6661 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_dix); 6662 } 6663 static DRIVER_ATTR_RO(dix); 6664 6665 static ssize_t dif_show(struct device_driver *ddp, char *buf) 6666 { 6667 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_dif); 6668 } 6669 static DRIVER_ATTR_RO(dif); 6670 6671 static ssize_t guard_show(struct device_driver *ddp, char *buf) 6672 { 6673 return scnprintf(buf, PAGE_SIZE, "%u\n", sdebug_guard); 6674 } 6675 static DRIVER_ATTR_RO(guard); 6676 6677 static ssize_t ato_show(struct device_driver *ddp, char *buf) 6678 { 6679 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_ato); 6680 } 6681 static DRIVER_ATTR_RO(ato); 6682 6683 static ssize_t map_show(struct device_driver *ddp, char *buf) 6684 { 6685 ssize_t count = 0; 6686 6687 if (!scsi_debug_lbp()) 6688 return scnprintf(buf, PAGE_SIZE, "0-%u\n", 6689 sdebug_store_sectors); 6690 6691 if (sdebug_fake_rw == 0 && !xa_empty(per_store_ap)) { 6692 struct sdeb_store_info *sip = xa_load(per_store_ap, 0); 6693 6694 if (sip) 6695 count = scnprintf(buf, PAGE_SIZE - 1, "%*pbl", 6696 (int)map_size, sip->map_storep); 6697 } 6698 buf[count++] = '\n'; 6699 buf[count] = '\0'; 6700 6701 return count; 6702 } 6703 static DRIVER_ATTR_RO(map); 6704 6705 static ssize_t random_show(struct device_driver *ddp, char *buf) 6706 { 6707 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_random); 6708 } 6709 6710 static ssize_t random_store(struct device_driver *ddp, const char *buf, 6711 size_t count) 6712 { 6713 bool v; 6714 6715 if (kstrtobool(buf, &v)) 6716 return -EINVAL; 6717 6718 sdebug_random = v; 6719 return count; 6720 } 6721 static DRIVER_ATTR_RW(random); 6722 6723 static ssize_t removable_show(struct device_driver *ddp, char *buf) 6724 { 6725 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_removable ? 1 : 0); 6726 } 6727 static ssize_t removable_store(struct device_driver *ddp, const char *buf, 6728 size_t count) 6729 { 6730 int n; 6731 6732 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) { 6733 sdebug_removable = (n > 0); 6734 return count; 6735 } 6736 return -EINVAL; 6737 } 6738 static DRIVER_ATTR_RW(removable); 6739 6740 static ssize_t host_lock_show(struct device_driver *ddp, char *buf) 6741 { 6742 return scnprintf(buf, PAGE_SIZE, "%d\n", !!sdebug_host_lock); 6743 } 6744 /* N.B. sdebug_host_lock does nothing, kept for backward compatibility */ 6745 static ssize_t host_lock_store(struct device_driver *ddp, const char *buf, 6746 size_t count) 6747 { 6748 int n; 6749 6750 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) { 6751 sdebug_host_lock = (n > 0); 6752 return count; 6753 } 6754 return -EINVAL; 6755 } 6756 static DRIVER_ATTR_RW(host_lock); 6757 6758 static ssize_t strict_show(struct device_driver *ddp, char *buf) 6759 { 6760 return scnprintf(buf, PAGE_SIZE, "%d\n", !!sdebug_strict); 6761 } 6762 static ssize_t strict_store(struct device_driver *ddp, const char *buf, 6763 size_t count) 6764 { 6765 int n; 6766 6767 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) { 6768 sdebug_strict = (n > 0); 6769 return count; 6770 } 6771 return -EINVAL; 6772 } 6773 static DRIVER_ATTR_RW(strict); 6774 6775 static ssize_t uuid_ctl_show(struct device_driver *ddp, char *buf) 6776 { 6777 return scnprintf(buf, PAGE_SIZE, "%d\n", !!sdebug_uuid_ctl); 6778 } 6779 static DRIVER_ATTR_RO(uuid_ctl); 6780 6781 static ssize_t cdb_len_show(struct device_driver *ddp, char *buf) 6782 { 6783 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_cdb_len); 6784 } 6785 static ssize_t cdb_len_store(struct device_driver *ddp, const char *buf, 6786 size_t count) 6787 { 6788 int ret, n; 6789 6790 ret = kstrtoint(buf, 0, &n); 6791 if (ret) 6792 return ret; 6793 sdebug_cdb_len = n; 6794 all_config_cdb_len(); 6795 return count; 6796 } 6797 static DRIVER_ATTR_RW(cdb_len); 6798 6799 static const char * const zbc_model_strs_a[] = { 6800 [BLK_ZONED_NONE] = "none", 6801 [BLK_ZONED_HA] = "host-aware", 6802 [BLK_ZONED_HM] = "host-managed", 6803 }; 6804 6805 static const char * const zbc_model_strs_b[] = { 6806 [BLK_ZONED_NONE] = "no", 6807 [BLK_ZONED_HA] = "aware", 6808 [BLK_ZONED_HM] = "managed", 6809 }; 6810 6811 static const char * const zbc_model_strs_c[] = { 6812 [BLK_ZONED_NONE] = "0", 6813 [BLK_ZONED_HA] = "1", 6814 [BLK_ZONED_HM] = "2", 6815 }; 6816 6817 static int sdeb_zbc_model_str(const char *cp) 6818 { 6819 int res = sysfs_match_string(zbc_model_strs_a, cp); 6820 6821 if (res < 0) { 6822 res = sysfs_match_string(zbc_model_strs_b, cp); 6823 if (res < 0) { 6824 res = sysfs_match_string(zbc_model_strs_c, cp); 6825 if (res < 0) 6826 return -EINVAL; 6827 } 6828 } 6829 return res; 6830 } 6831 6832 static ssize_t zbc_show(struct device_driver *ddp, char *buf) 6833 { 6834 return scnprintf(buf, PAGE_SIZE, "%s\n", 6835 zbc_model_strs_a[sdeb_zbc_model]); 6836 } 6837 static DRIVER_ATTR_RO(zbc); 6838 6839 static ssize_t tur_ms_to_ready_show(struct device_driver *ddp, char *buf) 6840 { 6841 return scnprintf(buf, PAGE_SIZE, "%d\n", sdeb_tur_ms_to_ready); 6842 } 6843 static DRIVER_ATTR_RO(tur_ms_to_ready); 6844 6845 /* Note: The following array creates attribute files in the 6846 /sys/bus/pseudo/drivers/scsi_debug directory. The advantage of these 6847 files (over those found in the /sys/module/scsi_debug/parameters 6848 directory) is that auxiliary actions can be triggered when an attribute 6849 is changed. For example see: add_host_store() above. 6850 */ 6851 6852 static struct attribute *sdebug_drv_attrs[] = { 6853 &driver_attr_delay.attr, 6854 &driver_attr_opts.attr, 6855 &driver_attr_ptype.attr, 6856 &driver_attr_dsense.attr, 6857 &driver_attr_fake_rw.attr, 6858 &driver_attr_host_max_queue.attr, 6859 &driver_attr_no_lun_0.attr, 6860 &driver_attr_num_tgts.attr, 6861 &driver_attr_dev_size_mb.attr, 6862 &driver_attr_num_parts.attr, 6863 &driver_attr_every_nth.attr, 6864 &driver_attr_lun_format.attr, 6865 &driver_attr_max_luns.attr, 6866 &driver_attr_max_queue.attr, 6867 &driver_attr_no_rwlock.attr, 6868 &driver_attr_no_uld.attr, 6869 &driver_attr_scsi_level.attr, 6870 &driver_attr_virtual_gb.attr, 6871 &driver_attr_add_host.attr, 6872 &driver_attr_per_host_store.attr, 6873 &driver_attr_vpd_use_hostno.attr, 6874 &driver_attr_sector_size.attr, 6875 &driver_attr_statistics.attr, 6876 &driver_attr_submit_queues.attr, 6877 &driver_attr_dix.attr, 6878 &driver_attr_dif.attr, 6879 &driver_attr_guard.attr, 6880 &driver_attr_ato.attr, 6881 &driver_attr_map.attr, 6882 &driver_attr_random.attr, 6883 &driver_attr_removable.attr, 6884 &driver_attr_host_lock.attr, 6885 &driver_attr_ndelay.attr, 6886 &driver_attr_strict.attr, 6887 &driver_attr_uuid_ctl.attr, 6888 &driver_attr_cdb_len.attr, 6889 &driver_attr_tur_ms_to_ready.attr, 6890 &driver_attr_zbc.attr, 6891 NULL, 6892 }; 6893 ATTRIBUTE_GROUPS(sdebug_drv); 6894 6895 static struct device *pseudo_primary; 6896 6897 static int __init scsi_debug_init(void) 6898 { 6899 bool want_store = (sdebug_fake_rw == 0); 6900 unsigned long sz; 6901 int k, ret, hosts_to_add; 6902 int idx = -1; 6903 6904 ramdisk_lck_a[0] = &atomic_rw; 6905 ramdisk_lck_a[1] = &atomic_rw2; 6906 atomic_set(&retired_max_queue, 0); 6907 6908 if (sdebug_ndelay >= 1000 * 1000 * 1000) { 6909 pr_warn("ndelay must be less than 1 second, ignored\n"); 6910 sdebug_ndelay = 0; 6911 } else if (sdebug_ndelay > 0) 6912 sdebug_jdelay = JDELAY_OVERRIDDEN; 6913 6914 switch (sdebug_sector_size) { 6915 case 512: 6916 case 1024: 6917 case 2048: 6918 case 4096: 6919 break; 6920 default: 6921 pr_err("invalid sector_size %d\n", sdebug_sector_size); 6922 return -EINVAL; 6923 } 6924 6925 switch (sdebug_dif) { 6926 case T10_PI_TYPE0_PROTECTION: 6927 break; 6928 case T10_PI_TYPE1_PROTECTION: 6929 case T10_PI_TYPE2_PROTECTION: 6930 case T10_PI_TYPE3_PROTECTION: 6931 have_dif_prot = true; 6932 break; 6933 6934 default: 6935 pr_err("dif must be 0, 1, 2 or 3\n"); 6936 return -EINVAL; 6937 } 6938 6939 if (sdebug_num_tgts < 0) { 6940 pr_err("num_tgts must be >= 0\n"); 6941 return -EINVAL; 6942 } 6943 6944 if (sdebug_guard > 1) { 6945 pr_err("guard must be 0 or 1\n"); 6946 return -EINVAL; 6947 } 6948 6949 if (sdebug_ato > 1) { 6950 pr_err("ato must be 0 or 1\n"); 6951 return -EINVAL; 6952 } 6953 6954 if (sdebug_physblk_exp > 15) { 6955 pr_err("invalid physblk_exp %u\n", sdebug_physblk_exp); 6956 return -EINVAL; 6957 } 6958 6959 sdebug_lun_am = sdebug_lun_am_i; 6960 if (sdebug_lun_am > SAM_LUN_AM_FLAT) { 6961 pr_warn("Invalid LUN format %u, using default\n", (int)sdebug_lun_am); 6962 sdebug_lun_am = SAM_LUN_AM_PERIPHERAL; 6963 } 6964 6965 if (sdebug_max_luns > 256) { 6966 if (sdebug_max_luns > 16384) { 6967 pr_warn("max_luns can be no more than 16384, use default\n"); 6968 sdebug_max_luns = DEF_MAX_LUNS; 6969 } 6970 sdebug_lun_am = SAM_LUN_AM_FLAT; 6971 } 6972 6973 if (sdebug_lowest_aligned > 0x3fff) { 6974 pr_err("lowest_aligned too big: %u\n", sdebug_lowest_aligned); 6975 return -EINVAL; 6976 } 6977 6978 if (submit_queues < 1) { 6979 pr_err("submit_queues must be 1 or more\n"); 6980 return -EINVAL; 6981 } 6982 6983 if ((sdebug_max_queue > SDEBUG_CANQUEUE) || (sdebug_max_queue < 1)) { 6984 pr_err("max_queue must be in range [1, %d]\n", SDEBUG_CANQUEUE); 6985 return -EINVAL; 6986 } 6987 6988 if ((sdebug_host_max_queue > SDEBUG_CANQUEUE) || 6989 (sdebug_host_max_queue < 0)) { 6990 pr_err("host_max_queue must be in range [0 %d]\n", 6991 SDEBUG_CANQUEUE); 6992 return -EINVAL; 6993 } 6994 6995 if (sdebug_host_max_queue && 6996 (sdebug_max_queue != sdebug_host_max_queue)) { 6997 sdebug_max_queue = sdebug_host_max_queue; 6998 pr_warn("fixing max submit queue depth to host max queue depth, %d\n", 6999 sdebug_max_queue); 7000 } 7001 7002 sdebug_q_arr = kcalloc(submit_queues, sizeof(struct sdebug_queue), 7003 GFP_KERNEL); 7004 if (sdebug_q_arr == NULL) 7005 return -ENOMEM; 7006 for (k = 0; k < submit_queues; ++k) 7007 spin_lock_init(&sdebug_q_arr[k].qc_lock); 7008 7009 /* 7010 * check for host managed zoned block device specified with 7011 * ptype=0x14 or zbc=XXX. 7012 */ 7013 if (sdebug_ptype == TYPE_ZBC) { 7014 sdeb_zbc_model = BLK_ZONED_HM; 7015 } else if (sdeb_zbc_model_s && *sdeb_zbc_model_s) { 7016 k = sdeb_zbc_model_str(sdeb_zbc_model_s); 7017 if (k < 0) { 7018 ret = k; 7019 goto free_q_arr; 7020 } 7021 sdeb_zbc_model = k; 7022 switch (sdeb_zbc_model) { 7023 case BLK_ZONED_NONE: 7024 case BLK_ZONED_HA: 7025 sdebug_ptype = TYPE_DISK; 7026 break; 7027 case BLK_ZONED_HM: 7028 sdebug_ptype = TYPE_ZBC; 7029 break; 7030 default: 7031 pr_err("Invalid ZBC model\n"); 7032 ret = -EINVAL; 7033 goto free_q_arr; 7034 } 7035 } 7036 if (sdeb_zbc_model != BLK_ZONED_NONE) { 7037 sdeb_zbc_in_use = true; 7038 if (sdebug_dev_size_mb == DEF_DEV_SIZE_PRE_INIT) 7039 sdebug_dev_size_mb = DEF_ZBC_DEV_SIZE_MB; 7040 } 7041 7042 if (sdebug_dev_size_mb == DEF_DEV_SIZE_PRE_INIT) 7043 sdebug_dev_size_mb = DEF_DEV_SIZE_MB; 7044 if (sdebug_dev_size_mb < 1) 7045 sdebug_dev_size_mb = 1; /* force minimum 1 MB ramdisk */ 7046 sz = (unsigned long)sdebug_dev_size_mb * 1048576; 7047 sdebug_store_sectors = sz / sdebug_sector_size; 7048 sdebug_capacity = get_sdebug_capacity(); 7049 7050 /* play around with geometry, don't waste too much on track 0 */ 7051 sdebug_heads = 8; 7052 sdebug_sectors_per = 32; 7053 if (sdebug_dev_size_mb >= 256) 7054 sdebug_heads = 64; 7055 else if (sdebug_dev_size_mb >= 16) 7056 sdebug_heads = 32; 7057 sdebug_cylinders_per = (unsigned long)sdebug_capacity / 7058 (sdebug_sectors_per * sdebug_heads); 7059 if (sdebug_cylinders_per >= 1024) { 7060 /* other LLDs do this; implies >= 1GB ram disk ... */ 7061 sdebug_heads = 255; 7062 sdebug_sectors_per = 63; 7063 sdebug_cylinders_per = (unsigned long)sdebug_capacity / 7064 (sdebug_sectors_per * sdebug_heads); 7065 } 7066 if (scsi_debug_lbp()) { 7067 sdebug_unmap_max_blocks = 7068 clamp(sdebug_unmap_max_blocks, 0U, 0xffffffffU); 7069 7070 sdebug_unmap_max_desc = 7071 clamp(sdebug_unmap_max_desc, 0U, 256U); 7072 7073 sdebug_unmap_granularity = 7074 clamp(sdebug_unmap_granularity, 1U, 0xffffffffU); 7075 7076 if (sdebug_unmap_alignment && 7077 sdebug_unmap_granularity <= 7078 sdebug_unmap_alignment) { 7079 pr_err("ERR: unmap_granularity <= unmap_alignment\n"); 7080 ret = -EINVAL; 7081 goto free_q_arr; 7082 } 7083 } 7084 xa_init_flags(per_store_ap, XA_FLAGS_ALLOC | XA_FLAGS_LOCK_IRQ); 7085 if (want_store) { 7086 idx = sdebug_add_store(); 7087 if (idx < 0) { 7088 ret = idx; 7089 goto free_q_arr; 7090 } 7091 } 7092 7093 pseudo_primary = root_device_register("pseudo_0"); 7094 if (IS_ERR(pseudo_primary)) { 7095 pr_warn("root_device_register() error\n"); 7096 ret = PTR_ERR(pseudo_primary); 7097 goto free_vm; 7098 } 7099 ret = bus_register(&pseudo_lld_bus); 7100 if (ret < 0) { 7101 pr_warn("bus_register error: %d\n", ret); 7102 goto dev_unreg; 7103 } 7104 ret = driver_register(&sdebug_driverfs_driver); 7105 if (ret < 0) { 7106 pr_warn("driver_register error: %d\n", ret); 7107 goto bus_unreg; 7108 } 7109 7110 hosts_to_add = sdebug_add_host; 7111 sdebug_add_host = 0; 7112 7113 for (k = 0; k < hosts_to_add; k++) { 7114 if (want_store && k == 0) { 7115 ret = sdebug_add_host_helper(idx); 7116 if (ret < 0) { 7117 pr_err("add_host_helper k=%d, error=%d\n", 7118 k, -ret); 7119 break; 7120 } 7121 } else { 7122 ret = sdebug_do_add_host(want_store && 7123 sdebug_per_host_store); 7124 if (ret < 0) { 7125 pr_err("add_host k=%d error=%d\n", k, -ret); 7126 break; 7127 } 7128 } 7129 } 7130 if (sdebug_verbose) 7131 pr_info("built %d host(s)\n", sdebug_num_hosts); 7132 7133 return 0; 7134 7135 bus_unreg: 7136 bus_unregister(&pseudo_lld_bus); 7137 dev_unreg: 7138 root_device_unregister(pseudo_primary); 7139 free_vm: 7140 sdebug_erase_store(idx, NULL); 7141 free_q_arr: 7142 kfree(sdebug_q_arr); 7143 return ret; 7144 } 7145 7146 static void __exit scsi_debug_exit(void) 7147 { 7148 int k = sdebug_num_hosts; 7149 7150 stop_all_queued(); 7151 for (; k; k--) 7152 sdebug_do_remove_host(true); 7153 free_all_queued(); 7154 driver_unregister(&sdebug_driverfs_driver); 7155 bus_unregister(&pseudo_lld_bus); 7156 root_device_unregister(pseudo_primary); 7157 7158 sdebug_erase_all_stores(false); 7159 xa_destroy(per_store_ap); 7160 kfree(sdebug_q_arr); 7161 } 7162 7163 device_initcall(scsi_debug_init); 7164 module_exit(scsi_debug_exit); 7165 7166 static void sdebug_release_adapter(struct device *dev) 7167 { 7168 struct sdebug_host_info *sdbg_host; 7169 7170 sdbg_host = to_sdebug_host(dev); 7171 kfree(sdbg_host); 7172 } 7173 7174 /* idx must be valid, if sip is NULL then it will be obtained using idx */ 7175 static void sdebug_erase_store(int idx, struct sdeb_store_info *sip) 7176 { 7177 if (idx < 0) 7178 return; 7179 if (!sip) { 7180 if (xa_empty(per_store_ap)) 7181 return; 7182 sip = xa_load(per_store_ap, idx); 7183 if (!sip) 7184 return; 7185 } 7186 vfree(sip->map_storep); 7187 vfree(sip->dif_storep); 7188 vfree(sip->storep); 7189 xa_erase(per_store_ap, idx); 7190 kfree(sip); 7191 } 7192 7193 /* Assume apart_from_first==false only in shutdown case. */ 7194 static void sdebug_erase_all_stores(bool apart_from_first) 7195 { 7196 unsigned long idx; 7197 struct sdeb_store_info *sip = NULL; 7198 7199 xa_for_each(per_store_ap, idx, sip) { 7200 if (apart_from_first) 7201 apart_from_first = false; 7202 else 7203 sdebug_erase_store(idx, sip); 7204 } 7205 if (apart_from_first) 7206 sdeb_most_recent_idx = sdeb_first_idx; 7207 } 7208 7209 /* 7210 * Returns store xarray new element index (idx) if >=0 else negated errno. 7211 * Limit the number of stores to 65536. 7212 */ 7213 static int sdebug_add_store(void) 7214 { 7215 int res; 7216 u32 n_idx; 7217 unsigned long iflags; 7218 unsigned long sz = (unsigned long)sdebug_dev_size_mb * 1048576; 7219 struct sdeb_store_info *sip = NULL; 7220 struct xa_limit xal = { .max = 1 << 16, .min = 0 }; 7221 7222 sip = kzalloc(sizeof(*sip), GFP_KERNEL); 7223 if (!sip) 7224 return -ENOMEM; 7225 7226 xa_lock_irqsave(per_store_ap, iflags); 7227 res = __xa_alloc(per_store_ap, &n_idx, sip, xal, GFP_ATOMIC); 7228 if (unlikely(res < 0)) { 7229 xa_unlock_irqrestore(per_store_ap, iflags); 7230 kfree(sip); 7231 pr_warn("%s: xa_alloc() errno=%d\n", __func__, -res); 7232 return res; 7233 } 7234 sdeb_most_recent_idx = n_idx; 7235 if (sdeb_first_idx < 0) 7236 sdeb_first_idx = n_idx; 7237 xa_unlock_irqrestore(per_store_ap, iflags); 7238 7239 res = -ENOMEM; 7240 sip->storep = vzalloc(sz); 7241 if (!sip->storep) { 7242 pr_err("user data oom\n"); 7243 goto err; 7244 } 7245 if (sdebug_num_parts > 0) 7246 sdebug_build_parts(sip->storep, sz); 7247 7248 /* DIF/DIX: what T10 calls Protection Information (PI) */ 7249 if (sdebug_dix) { 7250 int dif_size; 7251 7252 dif_size = sdebug_store_sectors * sizeof(struct t10_pi_tuple); 7253 sip->dif_storep = vmalloc(dif_size); 7254 7255 pr_info("dif_storep %u bytes @ %pK\n", dif_size, 7256 sip->dif_storep); 7257 7258 if (!sip->dif_storep) { 7259 pr_err("DIX oom\n"); 7260 goto err; 7261 } 7262 memset(sip->dif_storep, 0xff, dif_size); 7263 } 7264 /* Logical Block Provisioning */ 7265 if (scsi_debug_lbp()) { 7266 map_size = lba_to_map_index(sdebug_store_sectors - 1) + 1; 7267 sip->map_storep = vmalloc(array_size(sizeof(long), 7268 BITS_TO_LONGS(map_size))); 7269 7270 pr_info("%lu provisioning blocks\n", map_size); 7271 7272 if (!sip->map_storep) { 7273 pr_err("LBP map oom\n"); 7274 goto err; 7275 } 7276 7277 bitmap_zero(sip->map_storep, map_size); 7278 7279 /* Map first 1KB for partition table */ 7280 if (sdebug_num_parts) 7281 map_region(sip, 0, 2); 7282 } 7283 7284 rwlock_init(&sip->macc_lck); 7285 return (int)n_idx; 7286 err: 7287 sdebug_erase_store((int)n_idx, sip); 7288 pr_warn("%s: failed, errno=%d\n", __func__, -res); 7289 return res; 7290 } 7291 7292 static int sdebug_add_host_helper(int per_host_idx) 7293 { 7294 int k, devs_per_host, idx; 7295 int error = -ENOMEM; 7296 struct sdebug_host_info *sdbg_host; 7297 struct sdebug_dev_info *sdbg_devinfo, *tmp; 7298 7299 sdbg_host = kzalloc(sizeof(*sdbg_host), GFP_KERNEL); 7300 if (!sdbg_host) 7301 return -ENOMEM; 7302 idx = (per_host_idx < 0) ? sdeb_first_idx : per_host_idx; 7303 if (xa_get_mark(per_store_ap, idx, SDEB_XA_NOT_IN_USE)) 7304 xa_clear_mark(per_store_ap, idx, SDEB_XA_NOT_IN_USE); 7305 sdbg_host->si_idx = idx; 7306 7307 INIT_LIST_HEAD(&sdbg_host->dev_info_list); 7308 7309 devs_per_host = sdebug_num_tgts * sdebug_max_luns; 7310 for (k = 0; k < devs_per_host; k++) { 7311 sdbg_devinfo = sdebug_device_create(sdbg_host, GFP_KERNEL); 7312 if (!sdbg_devinfo) 7313 goto clean; 7314 } 7315 7316 spin_lock(&sdebug_host_list_lock); 7317 list_add_tail(&sdbg_host->host_list, &sdebug_host_list); 7318 spin_unlock(&sdebug_host_list_lock); 7319 7320 sdbg_host->dev.bus = &pseudo_lld_bus; 7321 sdbg_host->dev.parent = pseudo_primary; 7322 sdbg_host->dev.release = &sdebug_release_adapter; 7323 dev_set_name(&sdbg_host->dev, "adapter%d", sdebug_num_hosts); 7324 7325 error = device_register(&sdbg_host->dev); 7326 if (error) { 7327 spin_lock(&sdebug_host_list_lock); 7328 list_del(&sdbg_host->host_list); 7329 spin_unlock(&sdebug_host_list_lock); 7330 goto clean; 7331 } 7332 7333 ++sdebug_num_hosts; 7334 return 0; 7335 7336 clean: 7337 list_for_each_entry_safe(sdbg_devinfo, tmp, &sdbg_host->dev_info_list, 7338 dev_list) { 7339 list_del(&sdbg_devinfo->dev_list); 7340 kfree(sdbg_devinfo->zstate); 7341 kfree(sdbg_devinfo); 7342 } 7343 kfree(sdbg_host); 7344 pr_warn("%s: failed, errno=%d\n", __func__, -error); 7345 return error; 7346 } 7347 7348 static int sdebug_do_add_host(bool mk_new_store) 7349 { 7350 int ph_idx = sdeb_most_recent_idx; 7351 7352 if (mk_new_store) { 7353 ph_idx = sdebug_add_store(); 7354 if (ph_idx < 0) 7355 return ph_idx; 7356 } 7357 return sdebug_add_host_helper(ph_idx); 7358 } 7359 7360 static void sdebug_do_remove_host(bool the_end) 7361 { 7362 int idx = -1; 7363 struct sdebug_host_info *sdbg_host = NULL; 7364 struct sdebug_host_info *sdbg_host2; 7365 7366 spin_lock(&sdebug_host_list_lock); 7367 if (!list_empty(&sdebug_host_list)) { 7368 sdbg_host = list_entry(sdebug_host_list.prev, 7369 struct sdebug_host_info, host_list); 7370 idx = sdbg_host->si_idx; 7371 } 7372 if (!the_end && idx >= 0) { 7373 bool unique = true; 7374 7375 list_for_each_entry(sdbg_host2, &sdebug_host_list, host_list) { 7376 if (sdbg_host2 == sdbg_host) 7377 continue; 7378 if (idx == sdbg_host2->si_idx) { 7379 unique = false; 7380 break; 7381 } 7382 } 7383 if (unique) { 7384 xa_set_mark(per_store_ap, idx, SDEB_XA_NOT_IN_USE); 7385 if (idx == sdeb_most_recent_idx) 7386 --sdeb_most_recent_idx; 7387 } 7388 } 7389 if (sdbg_host) 7390 list_del(&sdbg_host->host_list); 7391 spin_unlock(&sdebug_host_list_lock); 7392 7393 if (!sdbg_host) 7394 return; 7395 7396 device_unregister(&sdbg_host->dev); 7397 --sdebug_num_hosts; 7398 } 7399 7400 static int sdebug_change_qdepth(struct scsi_device *sdev, int qdepth) 7401 { 7402 int num_in_q = 0; 7403 struct sdebug_dev_info *devip; 7404 7405 block_unblock_all_queues(true); 7406 devip = (struct sdebug_dev_info *)sdev->hostdata; 7407 if (NULL == devip) { 7408 block_unblock_all_queues(false); 7409 return -ENODEV; 7410 } 7411 num_in_q = atomic_read(&devip->num_in_q); 7412 7413 if (qdepth > SDEBUG_CANQUEUE) { 7414 qdepth = SDEBUG_CANQUEUE; 7415 pr_warn("%s: requested qdepth [%d] exceeds canqueue [%d], trim\n", __func__, 7416 qdepth, SDEBUG_CANQUEUE); 7417 } 7418 if (qdepth < 1) 7419 qdepth = 1; 7420 if (qdepth != sdev->queue_depth) 7421 scsi_change_queue_depth(sdev, qdepth); 7422 7423 if (SDEBUG_OPT_Q_NOISE & sdebug_opts) { 7424 sdev_printk(KERN_INFO, sdev, "%s: qdepth=%d, num_in_q=%d\n", 7425 __func__, qdepth, num_in_q); 7426 } 7427 block_unblock_all_queues(false); 7428 return sdev->queue_depth; 7429 } 7430 7431 static bool fake_timeout(struct scsi_cmnd *scp) 7432 { 7433 if (0 == (atomic_read(&sdebug_cmnd_count) % abs(sdebug_every_nth))) { 7434 if (sdebug_every_nth < -1) 7435 sdebug_every_nth = -1; 7436 if (SDEBUG_OPT_TIMEOUT & sdebug_opts) 7437 return true; /* ignore command causing timeout */ 7438 else if (SDEBUG_OPT_MAC_TIMEOUT & sdebug_opts && 7439 scsi_medium_access_command(scp)) 7440 return true; /* time out reads and writes */ 7441 } 7442 return false; 7443 } 7444 7445 /* Response to TUR or media access command when device stopped */ 7446 static int resp_not_ready(struct scsi_cmnd *scp, struct sdebug_dev_info *devip) 7447 { 7448 int stopped_state; 7449 u64 diff_ns = 0; 7450 ktime_t now_ts = ktime_get_boottime(); 7451 struct scsi_device *sdp = scp->device; 7452 7453 stopped_state = atomic_read(&devip->stopped); 7454 if (stopped_state == 2) { 7455 if (ktime_to_ns(now_ts) > ktime_to_ns(devip->create_ts)) { 7456 diff_ns = ktime_to_ns(ktime_sub(now_ts, devip->create_ts)); 7457 if (diff_ns >= ((u64)sdeb_tur_ms_to_ready * 1000000)) { 7458 /* tur_ms_to_ready timer extinguished */ 7459 atomic_set(&devip->stopped, 0); 7460 return 0; 7461 } 7462 } 7463 mk_sense_buffer(scp, NOT_READY, LOGICAL_UNIT_NOT_READY, 0x1); 7464 if (sdebug_verbose) 7465 sdev_printk(KERN_INFO, sdp, 7466 "%s: Not ready: in process of becoming ready\n", my_name); 7467 if (scp->cmnd[0] == TEST_UNIT_READY) { 7468 u64 tur_nanosecs_to_ready = (u64)sdeb_tur_ms_to_ready * 1000000; 7469 7470 if (diff_ns <= tur_nanosecs_to_ready) 7471 diff_ns = tur_nanosecs_to_ready - diff_ns; 7472 else 7473 diff_ns = tur_nanosecs_to_ready; 7474 /* As per 20-061r2 approved for spc6 by T10 on 20200716 */ 7475 do_div(diff_ns, 1000000); /* diff_ns becomes milliseconds */ 7476 scsi_set_sense_information(scp->sense_buffer, SCSI_SENSE_BUFFERSIZE, 7477 diff_ns); 7478 return check_condition_result; 7479 } 7480 } 7481 mk_sense_buffer(scp, NOT_READY, LOGICAL_UNIT_NOT_READY, 0x2); 7482 if (sdebug_verbose) 7483 sdev_printk(KERN_INFO, sdp, "%s: Not ready: initializing command required\n", 7484 my_name); 7485 return check_condition_result; 7486 } 7487 7488 static void sdebug_map_queues(struct Scsi_Host *shost) 7489 { 7490 int i, qoff; 7491 7492 if (shost->nr_hw_queues == 1) 7493 return; 7494 7495 for (i = 0, qoff = 0; i < HCTX_MAX_TYPES; i++) { 7496 struct blk_mq_queue_map *map = &shost->tag_set.map[i]; 7497 7498 map->nr_queues = 0; 7499 7500 if (i == HCTX_TYPE_DEFAULT) 7501 map->nr_queues = submit_queues - poll_queues; 7502 else if (i == HCTX_TYPE_POLL) 7503 map->nr_queues = poll_queues; 7504 7505 if (!map->nr_queues) { 7506 BUG_ON(i == HCTX_TYPE_DEFAULT); 7507 continue; 7508 } 7509 7510 map->queue_offset = qoff; 7511 blk_mq_map_queues(map); 7512 7513 qoff += map->nr_queues; 7514 } 7515 } 7516 7517 static int sdebug_blk_mq_poll(struct Scsi_Host *shost, unsigned int queue_num) 7518 { 7519 bool first; 7520 bool retiring = false; 7521 int num_entries = 0; 7522 unsigned int qc_idx = 0; 7523 unsigned long iflags; 7524 ktime_t kt_from_boot = ktime_get_boottime(); 7525 struct sdebug_queue *sqp; 7526 struct sdebug_queued_cmd *sqcp; 7527 struct scsi_cmnd *scp; 7528 struct sdebug_dev_info *devip; 7529 struct sdebug_defer *sd_dp; 7530 7531 sqp = sdebug_q_arr + queue_num; 7532 7533 spin_lock_irqsave(&sqp->qc_lock, iflags); 7534 7535 qc_idx = find_first_bit(sqp->in_use_bm, sdebug_max_queue); 7536 if (qc_idx >= sdebug_max_queue) 7537 goto unlock; 7538 7539 for (first = true; first || qc_idx + 1 < sdebug_max_queue; ) { 7540 if (first) { 7541 first = false; 7542 if (!test_bit(qc_idx, sqp->in_use_bm)) 7543 continue; 7544 } else { 7545 qc_idx = find_next_bit(sqp->in_use_bm, sdebug_max_queue, qc_idx + 1); 7546 } 7547 if (qc_idx >= sdebug_max_queue) 7548 break; 7549 7550 sqcp = &sqp->qc_arr[qc_idx]; 7551 sd_dp = sqcp->sd_dp; 7552 if (unlikely(!sd_dp)) 7553 continue; 7554 scp = sqcp->a_cmnd; 7555 if (unlikely(scp == NULL)) { 7556 pr_err("scp is NULL, queue_num=%d, qc_idx=%u from %s\n", 7557 queue_num, qc_idx, __func__); 7558 break; 7559 } 7560 if (READ_ONCE(sd_dp->defer_t) == SDEB_DEFER_POLL) { 7561 if (kt_from_boot < sd_dp->cmpl_ts) 7562 continue; 7563 7564 } else /* ignoring non REQ_POLLED requests */ 7565 continue; 7566 devip = (struct sdebug_dev_info *)scp->device->hostdata; 7567 if (likely(devip)) 7568 atomic_dec(&devip->num_in_q); 7569 else 7570 pr_err("devip=NULL from %s\n", __func__); 7571 if (unlikely(atomic_read(&retired_max_queue) > 0)) 7572 retiring = true; 7573 7574 sqcp->a_cmnd = NULL; 7575 if (unlikely(!test_and_clear_bit(qc_idx, sqp->in_use_bm))) { 7576 pr_err("Unexpected completion sqp %p queue_num=%d qc_idx=%u from %s\n", 7577 sqp, queue_num, qc_idx, __func__); 7578 break; 7579 } 7580 if (unlikely(retiring)) { /* user has reduced max_queue */ 7581 int k, retval; 7582 7583 retval = atomic_read(&retired_max_queue); 7584 if (qc_idx >= retval) { 7585 pr_err("index %d too large\n", retval); 7586 break; 7587 } 7588 k = find_last_bit(sqp->in_use_bm, retval); 7589 if ((k < sdebug_max_queue) || (k == retval)) 7590 atomic_set(&retired_max_queue, 0); 7591 else 7592 atomic_set(&retired_max_queue, k + 1); 7593 } 7594 WRITE_ONCE(sd_dp->defer_t, SDEB_DEFER_NONE); 7595 spin_unlock_irqrestore(&sqp->qc_lock, iflags); 7596 scsi_done(scp); /* callback to mid level */ 7597 num_entries++; 7598 spin_lock_irqsave(&sqp->qc_lock, iflags); 7599 if (find_first_bit(sqp->in_use_bm, sdebug_max_queue) >= sdebug_max_queue) 7600 break; 7601 } 7602 7603 unlock: 7604 spin_unlock_irqrestore(&sqp->qc_lock, iflags); 7605 7606 if (num_entries > 0) 7607 atomic_add(num_entries, &sdeb_mq_poll_count); 7608 return num_entries; 7609 } 7610 7611 static int scsi_debug_queuecommand(struct Scsi_Host *shost, 7612 struct scsi_cmnd *scp) 7613 { 7614 u8 sdeb_i; 7615 struct scsi_device *sdp = scp->device; 7616 const struct opcode_info_t *oip; 7617 const struct opcode_info_t *r_oip; 7618 struct sdebug_dev_info *devip; 7619 u8 *cmd = scp->cmnd; 7620 int (*r_pfp)(struct scsi_cmnd *, struct sdebug_dev_info *); 7621 int (*pfp)(struct scsi_cmnd *, struct sdebug_dev_info *) = NULL; 7622 int k, na; 7623 int errsts = 0; 7624 u64 lun_index = sdp->lun & 0x3FFF; 7625 u32 flags; 7626 u16 sa; 7627 u8 opcode = cmd[0]; 7628 bool has_wlun_rl; 7629 bool inject_now; 7630 7631 scsi_set_resid(scp, 0); 7632 if (sdebug_statistics) { 7633 atomic_inc(&sdebug_cmnd_count); 7634 inject_now = inject_on_this_cmd(); 7635 } else { 7636 inject_now = false; 7637 } 7638 if (unlikely(sdebug_verbose && 7639 !(SDEBUG_OPT_NO_CDB_NOISE & sdebug_opts))) { 7640 char b[120]; 7641 int n, len, sb; 7642 7643 len = scp->cmd_len; 7644 sb = (int)sizeof(b); 7645 if (len > 32) 7646 strcpy(b, "too long, over 32 bytes"); 7647 else { 7648 for (k = 0, n = 0; k < len && n < sb; ++k) 7649 n += scnprintf(b + n, sb - n, "%02x ", 7650 (u32)cmd[k]); 7651 } 7652 sdev_printk(KERN_INFO, sdp, "%s: tag=%#x, cmd %s\n", my_name, 7653 blk_mq_unique_tag(scsi_cmd_to_rq(scp)), b); 7654 } 7655 if (unlikely(inject_now && (sdebug_opts & SDEBUG_OPT_HOST_BUSY))) 7656 return SCSI_MLQUEUE_HOST_BUSY; 7657 has_wlun_rl = (sdp->lun == SCSI_W_LUN_REPORT_LUNS); 7658 if (unlikely(lun_index >= sdebug_max_luns && !has_wlun_rl)) 7659 goto err_out; 7660 7661 sdeb_i = opcode_ind_arr[opcode]; /* fully mapped */ 7662 oip = &opcode_info_arr[sdeb_i]; /* safe if table consistent */ 7663 devip = (struct sdebug_dev_info *)sdp->hostdata; 7664 if (unlikely(!devip)) { 7665 devip = find_build_dev_info(sdp); 7666 if (NULL == devip) 7667 goto err_out; 7668 } 7669 if (unlikely(inject_now && !atomic_read(&sdeb_inject_pending))) 7670 atomic_set(&sdeb_inject_pending, 1); 7671 7672 na = oip->num_attached; 7673 r_pfp = oip->pfp; 7674 if (na) { /* multiple commands with this opcode */ 7675 r_oip = oip; 7676 if (FF_SA & r_oip->flags) { 7677 if (F_SA_LOW & oip->flags) 7678 sa = 0x1f & cmd[1]; 7679 else 7680 sa = get_unaligned_be16(cmd + 8); 7681 for (k = 0; k <= na; oip = r_oip->arrp + k++) { 7682 if (opcode == oip->opcode && sa == oip->sa) 7683 break; 7684 } 7685 } else { /* since no service action only check opcode */ 7686 for (k = 0; k <= na; oip = r_oip->arrp + k++) { 7687 if (opcode == oip->opcode) 7688 break; 7689 } 7690 } 7691 if (k > na) { 7692 if (F_SA_LOW & r_oip->flags) 7693 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 4); 7694 else if (F_SA_HIGH & r_oip->flags) 7695 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 8, 7); 7696 else 7697 mk_sense_invalid_opcode(scp); 7698 goto check_cond; 7699 } 7700 } /* else (when na==0) we assume the oip is a match */ 7701 flags = oip->flags; 7702 if (unlikely(F_INV_OP & flags)) { 7703 mk_sense_invalid_opcode(scp); 7704 goto check_cond; 7705 } 7706 if (unlikely(has_wlun_rl && !(F_RL_WLUN_OK & flags))) { 7707 if (sdebug_verbose) 7708 sdev_printk(KERN_INFO, sdp, "%s: Opcode 0x%x not%s\n", 7709 my_name, opcode, " supported for wlun"); 7710 mk_sense_invalid_opcode(scp); 7711 goto check_cond; 7712 } 7713 if (unlikely(sdebug_strict)) { /* check cdb against mask */ 7714 u8 rem; 7715 int j; 7716 7717 for (k = 1; k < oip->len_mask[0] && k < 16; ++k) { 7718 rem = ~oip->len_mask[k] & cmd[k]; 7719 if (rem) { 7720 for (j = 7; j >= 0; --j, rem <<= 1) { 7721 if (0x80 & rem) 7722 break; 7723 } 7724 mk_sense_invalid_fld(scp, SDEB_IN_CDB, k, j); 7725 goto check_cond; 7726 } 7727 } 7728 } 7729 if (unlikely(!(F_SKIP_UA & flags) && 7730 find_first_bit(devip->uas_bm, 7731 SDEBUG_NUM_UAS) != SDEBUG_NUM_UAS)) { 7732 errsts = make_ua(scp, devip); 7733 if (errsts) 7734 goto check_cond; 7735 } 7736 if (unlikely(((F_M_ACCESS & flags) || scp->cmnd[0] == TEST_UNIT_READY) && 7737 atomic_read(&devip->stopped))) { 7738 errsts = resp_not_ready(scp, devip); 7739 if (errsts) 7740 goto fini; 7741 } 7742 if (sdebug_fake_rw && (F_FAKE_RW & flags)) 7743 goto fini; 7744 if (unlikely(sdebug_every_nth)) { 7745 if (fake_timeout(scp)) 7746 return 0; /* ignore command: make trouble */ 7747 } 7748 if (likely(oip->pfp)) 7749 pfp = oip->pfp; /* calls a resp_* function */ 7750 else 7751 pfp = r_pfp; /* if leaf function ptr NULL, try the root's */ 7752 7753 fini: 7754 if (F_DELAY_OVERR & flags) /* cmds like INQUIRY respond asap */ 7755 return schedule_resp(scp, devip, errsts, pfp, 0, 0); 7756 else if ((flags & F_LONG_DELAY) && (sdebug_jdelay > 0 || 7757 sdebug_ndelay > 10000)) { 7758 /* 7759 * Skip long delays if ndelay <= 10 microseconds. Otherwise 7760 * for Start Stop Unit (SSU) want at least 1 second delay and 7761 * if sdebug_jdelay>1 want a long delay of that many seconds. 7762 * For Synchronize Cache want 1/20 of SSU's delay. 7763 */ 7764 int jdelay = (sdebug_jdelay < 2) ? 1 : sdebug_jdelay; 7765 int denom = (flags & F_SYNC_DELAY) ? 20 : 1; 7766 7767 jdelay = mult_frac(USER_HZ * jdelay, HZ, denom * USER_HZ); 7768 return schedule_resp(scp, devip, errsts, pfp, jdelay, 0); 7769 } else 7770 return schedule_resp(scp, devip, errsts, pfp, sdebug_jdelay, 7771 sdebug_ndelay); 7772 check_cond: 7773 return schedule_resp(scp, devip, check_condition_result, NULL, 0, 0); 7774 err_out: 7775 return schedule_resp(scp, NULL, DID_NO_CONNECT << 16, NULL, 0, 0); 7776 } 7777 7778 static struct scsi_host_template sdebug_driver_template = { 7779 .show_info = scsi_debug_show_info, 7780 .write_info = scsi_debug_write_info, 7781 .proc_name = sdebug_proc_name, 7782 .name = "SCSI DEBUG", 7783 .info = scsi_debug_info, 7784 .slave_alloc = scsi_debug_slave_alloc, 7785 .slave_configure = scsi_debug_slave_configure, 7786 .slave_destroy = scsi_debug_slave_destroy, 7787 .ioctl = scsi_debug_ioctl, 7788 .queuecommand = scsi_debug_queuecommand, 7789 .change_queue_depth = sdebug_change_qdepth, 7790 .map_queues = sdebug_map_queues, 7791 .mq_poll = sdebug_blk_mq_poll, 7792 .eh_abort_handler = scsi_debug_abort, 7793 .eh_device_reset_handler = scsi_debug_device_reset, 7794 .eh_target_reset_handler = scsi_debug_target_reset, 7795 .eh_bus_reset_handler = scsi_debug_bus_reset, 7796 .eh_host_reset_handler = scsi_debug_host_reset, 7797 .can_queue = SDEBUG_CANQUEUE, 7798 .this_id = 7, 7799 .sg_tablesize = SG_MAX_SEGMENTS, 7800 .cmd_per_lun = DEF_CMD_PER_LUN, 7801 .max_sectors = -1U, 7802 .max_segment_size = -1U, 7803 .module = THIS_MODULE, 7804 .track_queue_depth = 1, 7805 }; 7806 7807 static int sdebug_driver_probe(struct device *dev) 7808 { 7809 int error = 0; 7810 struct sdebug_host_info *sdbg_host; 7811 struct Scsi_Host *hpnt; 7812 int hprot; 7813 7814 sdbg_host = to_sdebug_host(dev); 7815 7816 sdebug_driver_template.can_queue = sdebug_max_queue; 7817 sdebug_driver_template.cmd_per_lun = sdebug_max_queue; 7818 if (!sdebug_clustering) 7819 sdebug_driver_template.dma_boundary = PAGE_SIZE - 1; 7820 7821 hpnt = scsi_host_alloc(&sdebug_driver_template, sizeof(sdbg_host)); 7822 if (NULL == hpnt) { 7823 pr_err("scsi_host_alloc failed\n"); 7824 error = -ENODEV; 7825 return error; 7826 } 7827 if (submit_queues > nr_cpu_ids) { 7828 pr_warn("%s: trim submit_queues (was %d) to nr_cpu_ids=%u\n", 7829 my_name, submit_queues, nr_cpu_ids); 7830 submit_queues = nr_cpu_ids; 7831 } 7832 /* 7833 * Decide whether to tell scsi subsystem that we want mq. The 7834 * following should give the same answer for each host. 7835 */ 7836 hpnt->nr_hw_queues = submit_queues; 7837 if (sdebug_host_max_queue) 7838 hpnt->host_tagset = 1; 7839 7840 /* poll queues are possible for nr_hw_queues > 1 */ 7841 if (hpnt->nr_hw_queues == 1 || (poll_queues < 1)) { 7842 pr_warn("%s: trim poll_queues to 0. poll_q/nr_hw = (%d/%d)\n", 7843 my_name, poll_queues, hpnt->nr_hw_queues); 7844 poll_queues = 0; 7845 } 7846 7847 /* 7848 * Poll queues don't need interrupts, but we need at least one I/O queue 7849 * left over for non-polled I/O. 7850 * If condition not met, trim poll_queues to 1 (just for simplicity). 7851 */ 7852 if (poll_queues >= submit_queues) { 7853 if (submit_queues < 3) 7854 pr_warn("%s: trim poll_queues to 1\n", my_name); 7855 else 7856 pr_warn("%s: trim poll_queues to 1. Perhaps try poll_queues=%d\n", 7857 my_name, submit_queues - 1); 7858 poll_queues = 1; 7859 } 7860 if (poll_queues) 7861 hpnt->nr_maps = 3; 7862 7863 sdbg_host->shost = hpnt; 7864 *((struct sdebug_host_info **)hpnt->hostdata) = sdbg_host; 7865 if ((hpnt->this_id >= 0) && (sdebug_num_tgts > hpnt->this_id)) 7866 hpnt->max_id = sdebug_num_tgts + 1; 7867 else 7868 hpnt->max_id = sdebug_num_tgts; 7869 /* = sdebug_max_luns; */ 7870 hpnt->max_lun = SCSI_W_LUN_REPORT_LUNS + 1; 7871 7872 hprot = 0; 7873 7874 switch (sdebug_dif) { 7875 7876 case T10_PI_TYPE1_PROTECTION: 7877 hprot = SHOST_DIF_TYPE1_PROTECTION; 7878 if (sdebug_dix) 7879 hprot |= SHOST_DIX_TYPE1_PROTECTION; 7880 break; 7881 7882 case T10_PI_TYPE2_PROTECTION: 7883 hprot = SHOST_DIF_TYPE2_PROTECTION; 7884 if (sdebug_dix) 7885 hprot |= SHOST_DIX_TYPE2_PROTECTION; 7886 break; 7887 7888 case T10_PI_TYPE3_PROTECTION: 7889 hprot = SHOST_DIF_TYPE3_PROTECTION; 7890 if (sdebug_dix) 7891 hprot |= SHOST_DIX_TYPE3_PROTECTION; 7892 break; 7893 7894 default: 7895 if (sdebug_dix) 7896 hprot |= SHOST_DIX_TYPE0_PROTECTION; 7897 break; 7898 } 7899 7900 scsi_host_set_prot(hpnt, hprot); 7901 7902 if (have_dif_prot || sdebug_dix) 7903 pr_info("host protection%s%s%s%s%s%s%s\n", 7904 (hprot & SHOST_DIF_TYPE1_PROTECTION) ? " DIF1" : "", 7905 (hprot & SHOST_DIF_TYPE2_PROTECTION) ? " DIF2" : "", 7906 (hprot & SHOST_DIF_TYPE3_PROTECTION) ? " DIF3" : "", 7907 (hprot & SHOST_DIX_TYPE0_PROTECTION) ? " DIX0" : "", 7908 (hprot & SHOST_DIX_TYPE1_PROTECTION) ? " DIX1" : "", 7909 (hprot & SHOST_DIX_TYPE2_PROTECTION) ? " DIX2" : "", 7910 (hprot & SHOST_DIX_TYPE3_PROTECTION) ? " DIX3" : ""); 7911 7912 if (sdebug_guard == 1) 7913 scsi_host_set_guard(hpnt, SHOST_DIX_GUARD_IP); 7914 else 7915 scsi_host_set_guard(hpnt, SHOST_DIX_GUARD_CRC); 7916 7917 sdebug_verbose = !!(SDEBUG_OPT_NOISE & sdebug_opts); 7918 sdebug_any_injecting_opt = !!(SDEBUG_OPT_ALL_INJECTING & sdebug_opts); 7919 if (sdebug_every_nth) /* need stats counters for every_nth */ 7920 sdebug_statistics = true; 7921 error = scsi_add_host(hpnt, &sdbg_host->dev); 7922 if (error) { 7923 pr_err("scsi_add_host failed\n"); 7924 error = -ENODEV; 7925 scsi_host_put(hpnt); 7926 } else { 7927 scsi_scan_host(hpnt); 7928 } 7929 7930 return error; 7931 } 7932 7933 static void sdebug_driver_remove(struct device *dev) 7934 { 7935 struct sdebug_host_info *sdbg_host; 7936 struct sdebug_dev_info *sdbg_devinfo, *tmp; 7937 7938 sdbg_host = to_sdebug_host(dev); 7939 7940 scsi_remove_host(sdbg_host->shost); 7941 7942 list_for_each_entry_safe(sdbg_devinfo, tmp, &sdbg_host->dev_info_list, 7943 dev_list) { 7944 list_del(&sdbg_devinfo->dev_list); 7945 kfree(sdbg_devinfo->zstate); 7946 kfree(sdbg_devinfo); 7947 } 7948 7949 scsi_host_put(sdbg_host->shost); 7950 } 7951 7952 static int pseudo_lld_bus_match(struct device *dev, 7953 struct device_driver *dev_driver) 7954 { 7955 return 1; 7956 } 7957 7958 static struct bus_type pseudo_lld_bus = { 7959 .name = "pseudo", 7960 .match = pseudo_lld_bus_match, 7961 .probe = sdebug_driver_probe, 7962 .remove = sdebug_driver_remove, 7963 .drv_groups = sdebug_drv_groups, 7964 }; 7965