1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * vvvvvvvvvvvvvvvvvvvvvvv Original vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv 4 * Copyright (C) 1992 Eric Youngdale 5 * Simulate a host adapter with 2 disks attached. Do a lot of checking 6 * to make sure that we are not getting blocks mixed up, and PANIC if 7 * anything out of the ordinary is seen. 8 * ^^^^^^^^^^^^^^^^^^^^^^^ Original ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ 9 * 10 * Copyright (C) 2001 - 2020 Douglas Gilbert 11 * 12 * For documentation see http://sg.danny.cz/sg/scsi_debug.html 13 */ 14 15 16 #define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__ 17 18 #include <linux/module.h> 19 20 #include <linux/kernel.h> 21 #include <linux/errno.h> 22 #include <linux/jiffies.h> 23 #include <linux/slab.h> 24 #include <linux/types.h> 25 #include <linux/string.h> 26 #include <linux/genhd.h> 27 #include <linux/fs.h> 28 #include <linux/init.h> 29 #include <linux/proc_fs.h> 30 #include <linux/vmalloc.h> 31 #include <linux/moduleparam.h> 32 #include <linux/scatterlist.h> 33 #include <linux/blkdev.h> 34 #include <linux/crc-t10dif.h> 35 #include <linux/spinlock.h> 36 #include <linux/interrupt.h> 37 #include <linux/atomic.h> 38 #include <linux/hrtimer.h> 39 #include <linux/uuid.h> 40 #include <linux/t10-pi.h> 41 #include <linux/msdos_partition.h> 42 #include <linux/random.h> 43 #include <linux/xarray.h> 44 #include <linux/prefetch.h> 45 46 #include <net/checksum.h> 47 48 #include <asm/unaligned.h> 49 50 #include <scsi/scsi.h> 51 #include <scsi/scsi_cmnd.h> 52 #include <scsi/scsi_device.h> 53 #include <scsi/scsi_host.h> 54 #include <scsi/scsicam.h> 55 #include <scsi/scsi_eh.h> 56 #include <scsi/scsi_tcq.h> 57 #include <scsi/scsi_dbg.h> 58 59 #include "sd.h" 60 #include "scsi_logging.h" 61 62 /* make sure inq_product_rev string corresponds to this version */ 63 #define SDEBUG_VERSION "0190" /* format to fit INQUIRY revision field */ 64 static const char *sdebug_version_date = "20200710"; 65 66 #define MY_NAME "scsi_debug" 67 68 /* Additional Sense Code (ASC) */ 69 #define NO_ADDITIONAL_SENSE 0x0 70 #define LOGICAL_UNIT_NOT_READY 0x4 71 #define LOGICAL_UNIT_COMMUNICATION_FAILURE 0x8 72 #define UNRECOVERED_READ_ERR 0x11 73 #define PARAMETER_LIST_LENGTH_ERR 0x1a 74 #define INVALID_OPCODE 0x20 75 #define LBA_OUT_OF_RANGE 0x21 76 #define INVALID_FIELD_IN_CDB 0x24 77 #define INVALID_FIELD_IN_PARAM_LIST 0x26 78 #define WRITE_PROTECTED 0x27 79 #define UA_RESET_ASC 0x29 80 #define UA_CHANGED_ASC 0x2a 81 #define TARGET_CHANGED_ASC 0x3f 82 #define LUNS_CHANGED_ASCQ 0x0e 83 #define INSUFF_RES_ASC 0x55 84 #define INSUFF_RES_ASCQ 0x3 85 #define POWER_ON_RESET_ASCQ 0x0 86 #define BUS_RESET_ASCQ 0x2 /* scsi bus reset occurred */ 87 #define MODE_CHANGED_ASCQ 0x1 /* mode parameters changed */ 88 #define CAPACITY_CHANGED_ASCQ 0x9 89 #define SAVING_PARAMS_UNSUP 0x39 90 #define TRANSPORT_PROBLEM 0x4b 91 #define THRESHOLD_EXCEEDED 0x5d 92 #define LOW_POWER_COND_ON 0x5e 93 #define MISCOMPARE_VERIFY_ASC 0x1d 94 #define MICROCODE_CHANGED_ASCQ 0x1 /* with TARGET_CHANGED_ASC */ 95 #define MICROCODE_CHANGED_WO_RESET_ASCQ 0x16 96 #define WRITE_ERROR_ASC 0xc 97 #define UNALIGNED_WRITE_ASCQ 0x4 98 #define WRITE_BOUNDARY_ASCQ 0x5 99 #define READ_INVDATA_ASCQ 0x6 100 #define READ_BOUNDARY_ASCQ 0x7 101 #define INSUFF_ZONE_ASCQ 0xe 102 103 /* Additional Sense Code Qualifier (ASCQ) */ 104 #define ACK_NAK_TO 0x3 105 106 /* Default values for driver parameters */ 107 #define DEF_NUM_HOST 1 108 #define DEF_NUM_TGTS 1 109 #define DEF_MAX_LUNS 1 110 /* With these defaults, this driver will make 1 host with 1 target 111 * (id 0) containing 1 logical unit (lun 0). That is 1 device. 112 */ 113 #define DEF_ATO 1 114 #define DEF_CDB_LEN 10 115 #define DEF_JDELAY 1 /* if > 0 unit is a jiffy */ 116 #define DEF_DEV_SIZE_PRE_INIT 0 117 #define DEF_DEV_SIZE_MB 8 118 #define DEF_ZBC_DEV_SIZE_MB 128 119 #define DEF_DIF 0 120 #define DEF_DIX 0 121 #define DEF_PER_HOST_STORE false 122 #define DEF_D_SENSE 0 123 #define DEF_EVERY_NTH 0 124 #define DEF_FAKE_RW 0 125 #define DEF_GUARD 0 126 #define DEF_HOST_LOCK 0 127 #define DEF_LBPU 0 128 #define DEF_LBPWS 0 129 #define DEF_LBPWS10 0 130 #define DEF_LBPRZ 1 131 #define DEF_LOWEST_ALIGNED 0 132 #define DEF_NDELAY 0 /* if > 0 unit is a nanosecond */ 133 #define DEF_NO_LUN_0 0 134 #define DEF_NUM_PARTS 0 135 #define DEF_OPTS 0 136 #define DEF_OPT_BLKS 1024 137 #define DEF_PHYSBLK_EXP 0 138 #define DEF_OPT_XFERLEN_EXP 0 139 #define DEF_PTYPE TYPE_DISK 140 #define DEF_RANDOM false 141 #define DEF_REMOVABLE false 142 #define DEF_SCSI_LEVEL 7 /* INQUIRY, byte2 [6->SPC-4; 7->SPC-5] */ 143 #define DEF_SECTOR_SIZE 512 144 #define DEF_UNMAP_ALIGNMENT 0 145 #define DEF_UNMAP_GRANULARITY 1 146 #define DEF_UNMAP_MAX_BLOCKS 0xFFFFFFFF 147 #define DEF_UNMAP_MAX_DESC 256 148 #define DEF_VIRTUAL_GB 0 149 #define DEF_VPD_USE_HOSTNO 1 150 #define DEF_WRITESAME_LENGTH 0xFFFF 151 #define DEF_STRICT 0 152 #define DEF_STATISTICS false 153 #define DEF_SUBMIT_QUEUES 1 154 #define DEF_TUR_MS_TO_READY 0 155 #define DEF_UUID_CTL 0 156 #define JDELAY_OVERRIDDEN -9999 157 158 /* Default parameters for ZBC drives */ 159 #define DEF_ZBC_ZONE_SIZE_MB 128 160 #define DEF_ZBC_MAX_OPEN_ZONES 8 161 #define DEF_ZBC_NR_CONV_ZONES 1 162 163 #define SDEBUG_LUN_0_VAL 0 164 165 /* bit mask values for sdebug_opts */ 166 #define SDEBUG_OPT_NOISE 1 167 #define SDEBUG_OPT_MEDIUM_ERR 2 168 #define SDEBUG_OPT_TIMEOUT 4 169 #define SDEBUG_OPT_RECOVERED_ERR 8 170 #define SDEBUG_OPT_TRANSPORT_ERR 16 171 #define SDEBUG_OPT_DIF_ERR 32 172 #define SDEBUG_OPT_DIX_ERR 64 173 #define SDEBUG_OPT_MAC_TIMEOUT 128 174 #define SDEBUG_OPT_SHORT_TRANSFER 0x100 175 #define SDEBUG_OPT_Q_NOISE 0x200 176 #define SDEBUG_OPT_ALL_TSF 0x400 177 #define SDEBUG_OPT_RARE_TSF 0x800 178 #define SDEBUG_OPT_N_WCE 0x1000 179 #define SDEBUG_OPT_RESET_NOISE 0x2000 180 #define SDEBUG_OPT_NO_CDB_NOISE 0x4000 181 #define SDEBUG_OPT_HOST_BUSY 0x8000 182 #define SDEBUG_OPT_CMD_ABORT 0x10000 183 #define SDEBUG_OPT_ALL_NOISE (SDEBUG_OPT_NOISE | SDEBUG_OPT_Q_NOISE | \ 184 SDEBUG_OPT_RESET_NOISE) 185 #define SDEBUG_OPT_ALL_INJECTING (SDEBUG_OPT_RECOVERED_ERR | \ 186 SDEBUG_OPT_TRANSPORT_ERR | \ 187 SDEBUG_OPT_DIF_ERR | SDEBUG_OPT_DIX_ERR | \ 188 SDEBUG_OPT_SHORT_TRANSFER | \ 189 SDEBUG_OPT_HOST_BUSY | \ 190 SDEBUG_OPT_CMD_ABORT) 191 #define SDEBUG_OPT_RECOV_DIF_DIX (SDEBUG_OPT_RECOVERED_ERR | \ 192 SDEBUG_OPT_DIF_ERR | SDEBUG_OPT_DIX_ERR) 193 194 /* As indicated in SAM-5 and SPC-4 Unit Attentions (UAs) are returned in 195 * priority order. In the subset implemented here lower numbers have higher 196 * priority. The UA numbers should be a sequence starting from 0 with 197 * SDEBUG_NUM_UAS being 1 higher than the highest numbered UA. */ 198 #define SDEBUG_UA_POR 0 /* Power on, reset, or bus device reset */ 199 #define SDEBUG_UA_BUS_RESET 1 200 #define SDEBUG_UA_MODE_CHANGED 2 201 #define SDEBUG_UA_CAPACITY_CHANGED 3 202 #define SDEBUG_UA_LUNS_CHANGED 4 203 #define SDEBUG_UA_MICROCODE_CHANGED 5 /* simulate firmware change */ 204 #define SDEBUG_UA_MICROCODE_CHANGED_WO_RESET 6 205 #define SDEBUG_NUM_UAS 7 206 207 /* when 1==SDEBUG_OPT_MEDIUM_ERR, a medium error is simulated at this 208 * sector on read commands: */ 209 #define OPT_MEDIUM_ERR_ADDR 0x1234 /* that's sector 4660 in decimal */ 210 #define OPT_MEDIUM_ERR_NUM 10 /* number of consecutive medium errs */ 211 212 /* SDEBUG_CANQUEUE is the maximum number of commands that can be queued 213 * (for response) per submit queue at one time. Can be reduced by max_queue 214 * option. Command responses are not queued when jdelay=0 and ndelay=0. The 215 * per-device DEF_CMD_PER_LUN can be changed via sysfs: 216 * /sys/class/scsi_device/<h:c:t:l>/device/queue_depth 217 * but cannot exceed SDEBUG_CANQUEUE . 218 */ 219 #define SDEBUG_CANQUEUE_WORDS 3 /* a WORD is bits in a long */ 220 #define SDEBUG_CANQUEUE (SDEBUG_CANQUEUE_WORDS * BITS_PER_LONG) 221 #define DEF_CMD_PER_LUN SDEBUG_CANQUEUE 222 223 /* UA - Unit Attention; SA - Service Action; SSU - Start Stop Unit */ 224 #define F_D_IN 1 /* Data-in command (e.g. READ) */ 225 #define F_D_OUT 2 /* Data-out command (e.g. WRITE) */ 226 #define F_D_OUT_MAYBE 4 /* WRITE SAME, NDOB bit */ 227 #define F_D_UNKN 8 228 #define F_RL_WLUN_OK 0x10 /* allowed with REPORT LUNS W-LUN */ 229 #define F_SKIP_UA 0x20 /* bypass UAs (e.g. INQUIRY command) */ 230 #define F_DELAY_OVERR 0x40 /* for commands like INQUIRY */ 231 #define F_SA_LOW 0x80 /* SA is in cdb byte 1, bits 4 to 0 */ 232 #define F_SA_HIGH 0x100 /* SA is in cdb bytes 8 and 9 */ 233 #define F_INV_OP 0x200 /* invalid opcode (not supported) */ 234 #define F_FAKE_RW 0x400 /* bypass resp_*() when fake_rw set */ 235 #define F_M_ACCESS 0x800 /* media access, reacts to SSU state */ 236 #define F_SSU_DELAY 0x1000 /* SSU command delay (long-ish) */ 237 #define F_SYNC_DELAY 0x2000 /* SYNCHRONIZE CACHE delay */ 238 239 /* Useful combinations of the above flags */ 240 #define FF_RESPOND (F_RL_WLUN_OK | F_SKIP_UA | F_DELAY_OVERR) 241 #define FF_MEDIA_IO (F_M_ACCESS | F_FAKE_RW) 242 #define FF_SA (F_SA_HIGH | F_SA_LOW) 243 #define F_LONG_DELAY (F_SSU_DELAY | F_SYNC_DELAY) 244 245 #define SDEBUG_MAX_PARTS 4 246 247 #define SDEBUG_MAX_CMD_LEN 32 248 249 #define SDEB_XA_NOT_IN_USE XA_MARK_1 250 251 /* Zone types (zbcr05 table 25) */ 252 enum sdebug_z_type { 253 ZBC_ZONE_TYPE_CNV = 0x1, 254 ZBC_ZONE_TYPE_SWR = 0x2, 255 ZBC_ZONE_TYPE_SWP = 0x3, 256 }; 257 258 /* enumeration names taken from table 26, zbcr05 */ 259 enum sdebug_z_cond { 260 ZBC_NOT_WRITE_POINTER = 0x0, 261 ZC1_EMPTY = 0x1, 262 ZC2_IMPLICIT_OPEN = 0x2, 263 ZC3_EXPLICIT_OPEN = 0x3, 264 ZC4_CLOSED = 0x4, 265 ZC6_READ_ONLY = 0xd, 266 ZC5_FULL = 0xe, 267 ZC7_OFFLINE = 0xf, 268 }; 269 270 struct sdeb_zone_state { /* ZBC: per zone state */ 271 enum sdebug_z_type z_type; 272 enum sdebug_z_cond z_cond; 273 bool z_non_seq_resource; 274 unsigned int z_size; 275 sector_t z_start; 276 sector_t z_wp; 277 }; 278 279 struct sdebug_dev_info { 280 struct list_head dev_list; 281 unsigned int channel; 282 unsigned int target; 283 u64 lun; 284 uuid_t lu_name; 285 struct sdebug_host_info *sdbg_host; 286 unsigned long uas_bm[1]; 287 atomic_t num_in_q; 288 atomic_t stopped; /* 1: by SSU, 2: device start */ 289 bool used; 290 291 /* For ZBC devices */ 292 enum blk_zoned_model zmodel; 293 unsigned int zsize; 294 unsigned int zsize_shift; 295 unsigned int nr_zones; 296 unsigned int nr_conv_zones; 297 unsigned int nr_imp_open; 298 unsigned int nr_exp_open; 299 unsigned int nr_closed; 300 unsigned int max_open; 301 ktime_t create_ts; /* time since bootup that this device was created */ 302 struct sdeb_zone_state *zstate; 303 }; 304 305 struct sdebug_host_info { 306 struct list_head host_list; 307 int si_idx; /* sdeb_store_info (per host) xarray index */ 308 struct Scsi_Host *shost; 309 struct device dev; 310 struct list_head dev_info_list; 311 }; 312 313 /* There is an xarray of pointers to this struct's objects, one per host */ 314 struct sdeb_store_info { 315 rwlock_t macc_lck; /* for atomic media access on this store */ 316 u8 *storep; /* user data storage (ram) */ 317 struct t10_pi_tuple *dif_storep; /* protection info */ 318 void *map_storep; /* provisioning map */ 319 }; 320 321 #define to_sdebug_host(d) \ 322 container_of(d, struct sdebug_host_info, dev) 323 324 enum sdeb_defer_type {SDEB_DEFER_NONE = 0, SDEB_DEFER_HRT = 1, 325 SDEB_DEFER_WQ = 2, SDEB_DEFER_POLL = 3}; 326 327 struct sdebug_defer { 328 struct hrtimer hrt; 329 struct execute_work ew; 330 ktime_t cmpl_ts;/* time since boot to complete this cmd */ 331 int sqa_idx; /* index of sdebug_queue array */ 332 int qc_idx; /* index of sdebug_queued_cmd array within sqa_idx */ 333 int hc_idx; /* hostwide tag index */ 334 int issuing_cpu; 335 bool init_hrt; 336 bool init_wq; 337 bool init_poll; 338 bool aborted; /* true when blk_abort_request() already called */ 339 enum sdeb_defer_type defer_t; 340 }; 341 342 struct sdebug_queued_cmd { 343 /* corresponding bit set in in_use_bm[] in owning struct sdebug_queue 344 * instance indicates this slot is in use. 345 */ 346 struct sdebug_defer *sd_dp; 347 struct scsi_cmnd *a_cmnd; 348 }; 349 350 struct sdebug_queue { 351 struct sdebug_queued_cmd qc_arr[SDEBUG_CANQUEUE]; 352 unsigned long in_use_bm[SDEBUG_CANQUEUE_WORDS]; 353 spinlock_t qc_lock; 354 atomic_t blocked; /* to temporarily stop more being queued */ 355 }; 356 357 static atomic_t sdebug_cmnd_count; /* number of incoming commands */ 358 static atomic_t sdebug_completions; /* count of deferred completions */ 359 static atomic_t sdebug_miss_cpus; /* submission + completion cpus differ */ 360 static atomic_t sdebug_a_tsf; /* 'almost task set full' counter */ 361 static atomic_t sdeb_inject_pending; 362 static atomic_t sdeb_mq_poll_count; /* bumped when mq_poll returns > 0 */ 363 364 struct opcode_info_t { 365 u8 num_attached; /* 0 if this is it (i.e. a leaf); use 0xff */ 366 /* for terminating element */ 367 u8 opcode; /* if num_attached > 0, preferred */ 368 u16 sa; /* service action */ 369 u32 flags; /* OR-ed set of SDEB_F_* */ 370 int (*pfp)(struct scsi_cmnd *, struct sdebug_dev_info *); 371 const struct opcode_info_t *arrp; /* num_attached elements or NULL */ 372 u8 len_mask[16]; /* len_mask[0]-->cdb_len, then mask for cdb */ 373 /* 1 to min(cdb_len, 15); ignore cdb[15...] */ 374 }; 375 376 /* SCSI opcodes (first byte of cdb) of interest mapped onto these indexes */ 377 enum sdeb_opcode_index { 378 SDEB_I_INVALID_OPCODE = 0, 379 SDEB_I_INQUIRY = 1, 380 SDEB_I_REPORT_LUNS = 2, 381 SDEB_I_REQUEST_SENSE = 3, 382 SDEB_I_TEST_UNIT_READY = 4, 383 SDEB_I_MODE_SENSE = 5, /* 6, 10 */ 384 SDEB_I_MODE_SELECT = 6, /* 6, 10 */ 385 SDEB_I_LOG_SENSE = 7, 386 SDEB_I_READ_CAPACITY = 8, /* 10; 16 is in SA_IN(16) */ 387 SDEB_I_READ = 9, /* 6, 10, 12, 16 */ 388 SDEB_I_WRITE = 10, /* 6, 10, 12, 16 */ 389 SDEB_I_START_STOP = 11, 390 SDEB_I_SERV_ACT_IN_16 = 12, /* add ...SERV_ACT_IN_12 if needed */ 391 SDEB_I_SERV_ACT_OUT_16 = 13, /* add ...SERV_ACT_OUT_12 if needed */ 392 SDEB_I_MAINT_IN = 14, 393 SDEB_I_MAINT_OUT = 15, 394 SDEB_I_VERIFY = 16, /* VERIFY(10), VERIFY(16) */ 395 SDEB_I_VARIABLE_LEN = 17, /* READ(32), WRITE(32), WR_SCAT(32) */ 396 SDEB_I_RESERVE = 18, /* 6, 10 */ 397 SDEB_I_RELEASE = 19, /* 6, 10 */ 398 SDEB_I_ALLOW_REMOVAL = 20, /* PREVENT ALLOW MEDIUM REMOVAL */ 399 SDEB_I_REZERO_UNIT = 21, /* REWIND in SSC */ 400 SDEB_I_ATA_PT = 22, /* 12, 16 */ 401 SDEB_I_SEND_DIAG = 23, 402 SDEB_I_UNMAP = 24, 403 SDEB_I_WRITE_BUFFER = 25, 404 SDEB_I_WRITE_SAME = 26, /* 10, 16 */ 405 SDEB_I_SYNC_CACHE = 27, /* 10, 16 */ 406 SDEB_I_COMP_WRITE = 28, 407 SDEB_I_PRE_FETCH = 29, /* 10, 16 */ 408 SDEB_I_ZONE_OUT = 30, /* 0x94+SA; includes no data xfer */ 409 SDEB_I_ZONE_IN = 31, /* 0x95+SA; all have data-in */ 410 SDEB_I_LAST_ELEM_P1 = 32, /* keep this last (previous + 1) */ 411 }; 412 413 414 static const unsigned char opcode_ind_arr[256] = { 415 /* 0x0; 0x0->0x1f: 6 byte cdbs */ 416 SDEB_I_TEST_UNIT_READY, SDEB_I_REZERO_UNIT, 0, SDEB_I_REQUEST_SENSE, 417 0, 0, 0, 0, 418 SDEB_I_READ, 0, SDEB_I_WRITE, 0, 0, 0, 0, 0, 419 0, 0, SDEB_I_INQUIRY, 0, 0, SDEB_I_MODE_SELECT, SDEB_I_RESERVE, 420 SDEB_I_RELEASE, 421 0, 0, SDEB_I_MODE_SENSE, SDEB_I_START_STOP, 0, SDEB_I_SEND_DIAG, 422 SDEB_I_ALLOW_REMOVAL, 0, 423 /* 0x20; 0x20->0x3f: 10 byte cdbs */ 424 0, 0, 0, 0, 0, SDEB_I_READ_CAPACITY, 0, 0, 425 SDEB_I_READ, 0, SDEB_I_WRITE, 0, 0, 0, 0, SDEB_I_VERIFY, 426 0, 0, 0, 0, SDEB_I_PRE_FETCH, SDEB_I_SYNC_CACHE, 0, 0, 427 0, 0, 0, SDEB_I_WRITE_BUFFER, 0, 0, 0, 0, 428 /* 0x40; 0x40->0x5f: 10 byte cdbs */ 429 0, SDEB_I_WRITE_SAME, SDEB_I_UNMAP, 0, 0, 0, 0, 0, 430 0, 0, 0, 0, 0, SDEB_I_LOG_SENSE, 0, 0, 431 0, 0, 0, 0, 0, SDEB_I_MODE_SELECT, SDEB_I_RESERVE, 432 SDEB_I_RELEASE, 433 0, 0, SDEB_I_MODE_SENSE, 0, 0, 0, 0, 0, 434 /* 0x60; 0x60->0x7d are reserved, 0x7e is "extended cdb" */ 435 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 436 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 437 0, SDEB_I_VARIABLE_LEN, 438 /* 0x80; 0x80->0x9f: 16 byte cdbs */ 439 0, 0, 0, 0, 0, SDEB_I_ATA_PT, 0, 0, 440 SDEB_I_READ, SDEB_I_COMP_WRITE, SDEB_I_WRITE, 0, 441 0, 0, 0, SDEB_I_VERIFY, 442 SDEB_I_PRE_FETCH, SDEB_I_SYNC_CACHE, 0, SDEB_I_WRITE_SAME, 443 SDEB_I_ZONE_OUT, SDEB_I_ZONE_IN, 0, 0, 444 0, 0, 0, 0, 0, 0, SDEB_I_SERV_ACT_IN_16, SDEB_I_SERV_ACT_OUT_16, 445 /* 0xa0; 0xa0->0xbf: 12 byte cdbs */ 446 SDEB_I_REPORT_LUNS, SDEB_I_ATA_PT, 0, SDEB_I_MAINT_IN, 447 SDEB_I_MAINT_OUT, 0, 0, 0, 448 SDEB_I_READ, 0 /* SDEB_I_SERV_ACT_OUT_12 */, SDEB_I_WRITE, 449 0 /* SDEB_I_SERV_ACT_IN_12 */, 0, 0, 0, 0, 450 0, 0, 0, 0, 0, 0, 0, 0, 451 0, 0, 0, 0, 0, 0, 0, 0, 452 /* 0xc0; 0xc0->0xff: vendor specific */ 453 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 454 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 455 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 456 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 457 }; 458 459 /* 460 * The following "response" functions return the SCSI mid-level's 4 byte 461 * tuple-in-an-int. To handle commands with an IMMED bit, for a faster 462 * command completion, they can mask their return value with 463 * SDEG_RES_IMMED_MASK . 464 */ 465 #define SDEG_RES_IMMED_MASK 0x40000000 466 467 static int resp_inquiry(struct scsi_cmnd *, struct sdebug_dev_info *); 468 static int resp_report_luns(struct scsi_cmnd *, struct sdebug_dev_info *); 469 static int resp_requests(struct scsi_cmnd *, struct sdebug_dev_info *); 470 static int resp_mode_sense(struct scsi_cmnd *, struct sdebug_dev_info *); 471 static int resp_mode_select(struct scsi_cmnd *, struct sdebug_dev_info *); 472 static int resp_log_sense(struct scsi_cmnd *, struct sdebug_dev_info *); 473 static int resp_readcap(struct scsi_cmnd *, struct sdebug_dev_info *); 474 static int resp_read_dt0(struct scsi_cmnd *, struct sdebug_dev_info *); 475 static int resp_write_dt0(struct scsi_cmnd *, struct sdebug_dev_info *); 476 static int resp_write_scat(struct scsi_cmnd *, struct sdebug_dev_info *); 477 static int resp_start_stop(struct scsi_cmnd *, struct sdebug_dev_info *); 478 static int resp_readcap16(struct scsi_cmnd *, struct sdebug_dev_info *); 479 static int resp_get_lba_status(struct scsi_cmnd *, struct sdebug_dev_info *); 480 static int resp_report_tgtpgs(struct scsi_cmnd *, struct sdebug_dev_info *); 481 static int resp_unmap(struct scsi_cmnd *, struct sdebug_dev_info *); 482 static int resp_rsup_opcodes(struct scsi_cmnd *, struct sdebug_dev_info *); 483 static int resp_rsup_tmfs(struct scsi_cmnd *, struct sdebug_dev_info *); 484 static int resp_verify(struct scsi_cmnd *, struct sdebug_dev_info *); 485 static int resp_write_same_10(struct scsi_cmnd *, struct sdebug_dev_info *); 486 static int resp_write_same_16(struct scsi_cmnd *, struct sdebug_dev_info *); 487 static int resp_comp_write(struct scsi_cmnd *, struct sdebug_dev_info *); 488 static int resp_write_buffer(struct scsi_cmnd *, struct sdebug_dev_info *); 489 static int resp_sync_cache(struct scsi_cmnd *, struct sdebug_dev_info *); 490 static int resp_pre_fetch(struct scsi_cmnd *, struct sdebug_dev_info *); 491 static int resp_report_zones(struct scsi_cmnd *, struct sdebug_dev_info *); 492 static int resp_open_zone(struct scsi_cmnd *, struct sdebug_dev_info *); 493 static int resp_close_zone(struct scsi_cmnd *, struct sdebug_dev_info *); 494 static int resp_finish_zone(struct scsi_cmnd *, struct sdebug_dev_info *); 495 static int resp_rwp_zone(struct scsi_cmnd *, struct sdebug_dev_info *); 496 497 static int sdebug_do_add_host(bool mk_new_store); 498 static int sdebug_add_host_helper(int per_host_idx); 499 static void sdebug_do_remove_host(bool the_end); 500 static int sdebug_add_store(void); 501 static void sdebug_erase_store(int idx, struct sdeb_store_info *sip); 502 static void sdebug_erase_all_stores(bool apart_from_first); 503 504 /* 505 * The following are overflow arrays for cdbs that "hit" the same index in 506 * the opcode_info_arr array. The most time sensitive (or commonly used) cdb 507 * should be placed in opcode_info_arr[], the others should be placed here. 508 */ 509 static const struct opcode_info_t msense_iarr[] = { 510 {0, 0x1a, 0, F_D_IN, NULL, NULL, 511 {6, 0xe8, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} }, 512 }; 513 514 static const struct opcode_info_t mselect_iarr[] = { 515 {0, 0x15, 0, F_D_OUT, NULL, NULL, 516 {6, 0xf1, 0, 0, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} }, 517 }; 518 519 static const struct opcode_info_t read_iarr[] = { 520 {0, 0x28, 0, F_D_IN | FF_MEDIA_IO, resp_read_dt0, NULL,/* READ(10) */ 521 {10, 0xff, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xff, 0xff, 0xc7, 0, 0, 522 0, 0, 0, 0} }, 523 {0, 0x8, 0, F_D_IN | FF_MEDIA_IO, resp_read_dt0, NULL, /* READ(6) */ 524 {6, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} }, 525 {0, 0xa8, 0, F_D_IN | FF_MEDIA_IO, resp_read_dt0, NULL,/* READ(12) */ 526 {12, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xbf, 527 0xc7, 0, 0, 0, 0} }, 528 }; 529 530 static const struct opcode_info_t write_iarr[] = { 531 {0, 0x2a, 0, F_D_OUT | FF_MEDIA_IO, resp_write_dt0, /* WRITE(10) */ 532 NULL, {10, 0xfb, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xff, 0xff, 0xc7, 533 0, 0, 0, 0, 0, 0} }, 534 {0, 0xa, 0, F_D_OUT | FF_MEDIA_IO, resp_write_dt0, /* WRITE(6) */ 535 NULL, {6, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 536 0, 0, 0} }, 537 {0, 0xaa, 0, F_D_OUT | FF_MEDIA_IO, resp_write_dt0, /* WRITE(12) */ 538 NULL, {12, 0xfb, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 539 0xbf, 0xc7, 0, 0, 0, 0} }, 540 }; 541 542 static const struct opcode_info_t verify_iarr[] = { 543 {0, 0x2f, 0, F_D_OUT_MAYBE | FF_MEDIA_IO, resp_verify,/* VERIFY(10) */ 544 NULL, {10, 0xf7, 0xff, 0xff, 0xff, 0xff, 0xbf, 0xff, 0xff, 0xc7, 545 0, 0, 0, 0, 0, 0} }, 546 }; 547 548 static const struct opcode_info_t sa_in_16_iarr[] = { 549 {0, 0x9e, 0x12, F_SA_LOW | F_D_IN, resp_get_lba_status, NULL, 550 {16, 0x12, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 551 0xff, 0xff, 0xff, 0, 0xc7} }, /* GET LBA STATUS(16) */ 552 }; 553 554 static const struct opcode_info_t vl_iarr[] = { /* VARIABLE LENGTH */ 555 {0, 0x7f, 0xb, F_SA_HIGH | F_D_OUT | FF_MEDIA_IO, resp_write_dt0, 556 NULL, {32, 0xc7, 0, 0, 0, 0, 0x3f, 0x18, 0x0, 0xb, 0xfa, 557 0, 0xff, 0xff, 0xff, 0xff} }, /* WRITE(32) */ 558 {0, 0x7f, 0x11, F_SA_HIGH | F_D_OUT | FF_MEDIA_IO, resp_write_scat, 559 NULL, {32, 0xc7, 0, 0, 0, 0, 0x3f, 0x18, 0x0, 0x11, 0xf8, 560 0, 0xff, 0xff, 0x0, 0x0} }, /* WRITE SCATTERED(32) */ 561 }; 562 563 static const struct opcode_info_t maint_in_iarr[] = { /* MAINT IN */ 564 {0, 0xa3, 0xc, F_SA_LOW | F_D_IN, resp_rsup_opcodes, NULL, 565 {12, 0xc, 0x87, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0, 566 0xc7, 0, 0, 0, 0} }, /* REPORT SUPPORTED OPERATION CODES */ 567 {0, 0xa3, 0xd, F_SA_LOW | F_D_IN, resp_rsup_tmfs, NULL, 568 {12, 0xd, 0x80, 0, 0, 0, 0xff, 0xff, 0xff, 0xff, 0, 0xc7, 0, 0, 569 0, 0} }, /* REPORTED SUPPORTED TASK MANAGEMENT FUNCTIONS */ 570 }; 571 572 static const struct opcode_info_t write_same_iarr[] = { 573 {0, 0x93, 0, F_D_OUT_MAYBE | FF_MEDIA_IO, resp_write_same_16, NULL, 574 {16, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 575 0xff, 0xff, 0xff, 0x3f, 0xc7} }, /* WRITE SAME(16) */ 576 }; 577 578 static const struct opcode_info_t reserve_iarr[] = { 579 {0, 0x16, 0, F_D_OUT, NULL, NULL, /* RESERVE(6) */ 580 {6, 0x1f, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} }, 581 }; 582 583 static const struct opcode_info_t release_iarr[] = { 584 {0, 0x17, 0, F_D_OUT, NULL, NULL, /* RELEASE(6) */ 585 {6, 0x1f, 0xff, 0, 0, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} }, 586 }; 587 588 static const struct opcode_info_t sync_cache_iarr[] = { 589 {0, 0x91, 0, F_SYNC_DELAY | F_M_ACCESS, resp_sync_cache, NULL, 590 {16, 0x6, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 591 0xff, 0xff, 0xff, 0xff, 0x3f, 0xc7} }, /* SYNC_CACHE (16) */ 592 }; 593 594 static const struct opcode_info_t pre_fetch_iarr[] = { 595 {0, 0x90, 0, F_SYNC_DELAY | FF_MEDIA_IO, resp_pre_fetch, NULL, 596 {16, 0x2, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 597 0xff, 0xff, 0xff, 0xff, 0x3f, 0xc7} }, /* PRE-FETCH (16) */ 598 }; 599 600 static const struct opcode_info_t zone_out_iarr[] = { /* ZONE OUT(16) */ 601 {0, 0x94, 0x1, F_SA_LOW | F_M_ACCESS, resp_close_zone, NULL, 602 {16, 0x1, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 603 0xff, 0, 0, 0xff, 0xff, 0x1, 0xc7} }, /* CLOSE ZONE */ 604 {0, 0x94, 0x2, F_SA_LOW | F_M_ACCESS, resp_finish_zone, NULL, 605 {16, 0x2, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 606 0xff, 0, 0, 0xff, 0xff, 0x1, 0xc7} }, /* FINISH ZONE */ 607 {0, 0x94, 0x4, F_SA_LOW | F_M_ACCESS, resp_rwp_zone, NULL, 608 {16, 0x4, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 609 0xff, 0, 0, 0xff, 0xff, 0x1, 0xc7} }, /* RESET WRITE POINTER */ 610 }; 611 612 static const struct opcode_info_t zone_in_iarr[] = { /* ZONE IN(16) */ 613 {0, 0x95, 0x6, F_SA_LOW | F_D_IN | F_M_ACCESS, NULL, NULL, 614 {16, 0x6, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 615 0xff, 0xff, 0xff, 0xff, 0x3f, 0xc7} }, /* REPORT ZONES */ 616 }; 617 618 619 /* This array is accessed via SDEB_I_* values. Make sure all are mapped, 620 * plus the terminating elements for logic that scans this table such as 621 * REPORT SUPPORTED OPERATION CODES. */ 622 static const struct opcode_info_t opcode_info_arr[SDEB_I_LAST_ELEM_P1 + 1] = { 623 /* 0 */ 624 {0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL, /* unknown opcodes */ 625 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} }, 626 {0, 0x12, 0, FF_RESPOND | F_D_IN, resp_inquiry, NULL, /* INQUIRY */ 627 {6, 0xe3, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} }, 628 {0, 0xa0, 0, FF_RESPOND | F_D_IN, resp_report_luns, NULL, 629 {12, 0xe3, 0xff, 0, 0, 0, 0xff, 0xff, 0xff, 0xff, 0, 0xc7, 0, 0, 630 0, 0} }, /* REPORT LUNS */ 631 {0, 0x3, 0, FF_RESPOND | F_D_IN, resp_requests, NULL, 632 {6, 0xe1, 0, 0, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} }, 633 {0, 0x0, 0, F_M_ACCESS | F_RL_WLUN_OK, NULL, NULL,/* TEST UNIT READY */ 634 {6, 0, 0, 0, 0, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} }, 635 /* 5 */ 636 {ARRAY_SIZE(msense_iarr), 0x5a, 0, F_D_IN, /* MODE SENSE(10) */ 637 resp_mode_sense, msense_iarr, {10, 0xf8, 0xff, 0xff, 0, 0, 0, 638 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0} }, 639 {ARRAY_SIZE(mselect_iarr), 0x55, 0, F_D_OUT, /* MODE SELECT(10) */ 640 resp_mode_select, mselect_iarr, {10, 0xf1, 0, 0, 0, 0, 0, 0xff, 641 0xff, 0xc7, 0, 0, 0, 0, 0, 0} }, 642 {0, 0x4d, 0, F_D_IN, resp_log_sense, NULL, /* LOG SENSE */ 643 {10, 0xe3, 0xff, 0xff, 0, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 644 0, 0, 0} }, 645 {0, 0x25, 0, F_D_IN, resp_readcap, NULL, /* READ CAPACITY(10) */ 646 {10, 0xe1, 0xff, 0xff, 0xff, 0xff, 0, 0, 0x1, 0xc7, 0, 0, 0, 0, 647 0, 0} }, 648 {ARRAY_SIZE(read_iarr), 0x88, 0, F_D_IN | FF_MEDIA_IO, /* READ(16) */ 649 resp_read_dt0, read_iarr, {16, 0xfe, 0xff, 0xff, 0xff, 0xff, 650 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc7} }, 651 /* 10 */ 652 {ARRAY_SIZE(write_iarr), 0x8a, 0, F_D_OUT | FF_MEDIA_IO, 653 resp_write_dt0, write_iarr, /* WRITE(16) */ 654 {16, 0xfa, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 655 0xff, 0xff, 0xff, 0xff, 0xff, 0xc7} }, 656 {0, 0x1b, 0, F_SSU_DELAY, resp_start_stop, NULL,/* START STOP UNIT */ 657 {6, 0x1, 0, 0xf, 0xf7, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} }, 658 {ARRAY_SIZE(sa_in_16_iarr), 0x9e, 0x10, F_SA_LOW | F_D_IN, 659 resp_readcap16, sa_in_16_iarr, /* SA_IN(16), READ CAPACITY(16) */ 660 {16, 0x10, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 661 0xff, 0xff, 0xff, 0xff, 0x1, 0xc7} }, 662 {0, 0x9f, 0x12, F_SA_LOW | F_D_OUT | FF_MEDIA_IO, resp_write_scat, 663 NULL, {16, 0x12, 0xf9, 0x0, 0xff, 0xff, 0, 0, 0xff, 0xff, 0xff, 664 0xff, 0xff, 0xff, 0xff, 0xc7} }, /* SA_OUT(16), WRITE SCAT(16) */ 665 {ARRAY_SIZE(maint_in_iarr), 0xa3, 0xa, F_SA_LOW | F_D_IN, 666 resp_report_tgtpgs, /* MAINT IN, REPORT TARGET PORT GROUPS */ 667 maint_in_iarr, {12, 0xea, 0, 0, 0, 0, 0xff, 0xff, 0xff, 668 0xff, 0, 0xc7, 0, 0, 0, 0} }, 669 /* 15 */ 670 {0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL, /* MAINT OUT */ 671 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} }, 672 {ARRAY_SIZE(verify_iarr), 0x8f, 0, 673 F_D_OUT_MAYBE | FF_MEDIA_IO, resp_verify, /* VERIFY(16) */ 674 verify_iarr, {16, 0xf6, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 675 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xc7} }, 676 {ARRAY_SIZE(vl_iarr), 0x7f, 0x9, F_SA_HIGH | F_D_IN | FF_MEDIA_IO, 677 resp_read_dt0, vl_iarr, /* VARIABLE LENGTH, READ(32) */ 678 {32, 0xc7, 0, 0, 0, 0, 0x3f, 0x18, 0x0, 0x9, 0xfe, 0, 0xff, 0xff, 679 0xff, 0xff} }, 680 {ARRAY_SIZE(reserve_iarr), 0x56, 0, F_D_OUT, 681 NULL, reserve_iarr, /* RESERVE(10) <no response function> */ 682 {10, 0xff, 0xff, 0xff, 0, 0, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 683 0} }, 684 {ARRAY_SIZE(release_iarr), 0x57, 0, F_D_OUT, 685 NULL, release_iarr, /* RELEASE(10) <no response function> */ 686 {10, 0x13, 0xff, 0xff, 0, 0, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 687 0} }, 688 /* 20 */ 689 {0, 0x1e, 0, 0, NULL, NULL, /* ALLOW REMOVAL */ 690 {6, 0, 0, 0, 0x3, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} }, 691 {0, 0x1, 0, 0, resp_start_stop, NULL, /* REWIND ?? */ 692 {6, 0x1, 0, 0, 0, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} }, 693 {0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL, /* ATA_PT */ 694 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} }, 695 {0, 0x1d, F_D_OUT, 0, NULL, NULL, /* SEND DIAGNOSTIC */ 696 {6, 0xf7, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} }, 697 {0, 0x42, 0, F_D_OUT | FF_MEDIA_IO, resp_unmap, NULL, /* UNMAP */ 698 {10, 0x1, 0, 0, 0, 0, 0x3f, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0} }, 699 /* 25 */ 700 {0, 0x3b, 0, F_D_OUT_MAYBE, resp_write_buffer, NULL, 701 {10, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0, 702 0, 0, 0, 0} }, /* WRITE_BUFFER */ 703 {ARRAY_SIZE(write_same_iarr), 0x41, 0, F_D_OUT_MAYBE | FF_MEDIA_IO, 704 resp_write_same_10, write_same_iarr, /* WRITE SAME(10) */ 705 {10, 0xff, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xff, 0xff, 0xc7, 0, 706 0, 0, 0, 0, 0} }, 707 {ARRAY_SIZE(sync_cache_iarr), 0x35, 0, F_SYNC_DELAY | F_M_ACCESS, 708 resp_sync_cache, sync_cache_iarr, 709 {10, 0x7, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xff, 0xff, 0xc7, 0, 0, 710 0, 0, 0, 0} }, /* SYNC_CACHE (10) */ 711 {0, 0x89, 0, F_D_OUT | FF_MEDIA_IO, resp_comp_write, NULL, 712 {16, 0xf8, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0, 0, 713 0, 0xff, 0x3f, 0xc7} }, /* COMPARE AND WRITE */ 714 {ARRAY_SIZE(pre_fetch_iarr), 0x34, 0, F_SYNC_DELAY | FF_MEDIA_IO, 715 resp_pre_fetch, pre_fetch_iarr, 716 {10, 0x2, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xff, 0xff, 0xc7, 0, 0, 717 0, 0, 0, 0} }, /* PRE-FETCH (10) */ 718 719 /* 30 */ 720 {ARRAY_SIZE(zone_out_iarr), 0x94, 0x3, F_SA_LOW | F_M_ACCESS, 721 resp_open_zone, zone_out_iarr, /* ZONE_OUT(16), OPEN ZONE) */ 722 {16, 0x3 /* SA */, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 723 0xff, 0xff, 0x0, 0x0, 0xff, 0xff, 0x1, 0xc7} }, 724 {ARRAY_SIZE(zone_in_iarr), 0x95, 0x0, F_SA_LOW | F_M_ACCESS, 725 resp_report_zones, zone_in_iarr, /* ZONE_IN(16), REPORT ZONES) */ 726 {16, 0x0 /* SA */, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 727 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xbf, 0xc7} }, 728 /* sentinel */ 729 {0xff, 0, 0, 0, NULL, NULL, /* terminating element */ 730 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} }, 731 }; 732 733 static int sdebug_num_hosts; 734 static int sdebug_add_host = DEF_NUM_HOST; /* in sysfs this is relative */ 735 static int sdebug_ato = DEF_ATO; 736 static int sdebug_cdb_len = DEF_CDB_LEN; 737 static int sdebug_jdelay = DEF_JDELAY; /* if > 0 then unit is jiffies */ 738 static int sdebug_dev_size_mb = DEF_DEV_SIZE_PRE_INIT; 739 static int sdebug_dif = DEF_DIF; 740 static int sdebug_dix = DEF_DIX; 741 static int sdebug_dsense = DEF_D_SENSE; 742 static int sdebug_every_nth = DEF_EVERY_NTH; 743 static int sdebug_fake_rw = DEF_FAKE_RW; 744 static unsigned int sdebug_guard = DEF_GUARD; 745 static int sdebug_host_max_queue; /* per host */ 746 static int sdebug_lowest_aligned = DEF_LOWEST_ALIGNED; 747 static int sdebug_max_luns = DEF_MAX_LUNS; 748 static int sdebug_max_queue = SDEBUG_CANQUEUE; /* per submit queue */ 749 static unsigned int sdebug_medium_error_start = OPT_MEDIUM_ERR_ADDR; 750 static int sdebug_medium_error_count = OPT_MEDIUM_ERR_NUM; 751 static atomic_t retired_max_queue; /* if > 0 then was prior max_queue */ 752 static int sdebug_ndelay = DEF_NDELAY; /* if > 0 then unit is nanoseconds */ 753 static int sdebug_no_lun_0 = DEF_NO_LUN_0; 754 static int sdebug_no_uld; 755 static int sdebug_num_parts = DEF_NUM_PARTS; 756 static int sdebug_num_tgts = DEF_NUM_TGTS; /* targets per host */ 757 static int sdebug_opt_blks = DEF_OPT_BLKS; 758 static int sdebug_opts = DEF_OPTS; 759 static int sdebug_physblk_exp = DEF_PHYSBLK_EXP; 760 static int sdebug_opt_xferlen_exp = DEF_OPT_XFERLEN_EXP; 761 static int sdebug_ptype = DEF_PTYPE; /* SCSI peripheral device type */ 762 static int sdebug_scsi_level = DEF_SCSI_LEVEL; 763 static int sdebug_sector_size = DEF_SECTOR_SIZE; 764 static int sdeb_tur_ms_to_ready = DEF_TUR_MS_TO_READY; 765 static int sdebug_virtual_gb = DEF_VIRTUAL_GB; 766 static int sdebug_vpd_use_hostno = DEF_VPD_USE_HOSTNO; 767 static unsigned int sdebug_lbpu = DEF_LBPU; 768 static unsigned int sdebug_lbpws = DEF_LBPWS; 769 static unsigned int sdebug_lbpws10 = DEF_LBPWS10; 770 static unsigned int sdebug_lbprz = DEF_LBPRZ; 771 static unsigned int sdebug_unmap_alignment = DEF_UNMAP_ALIGNMENT; 772 static unsigned int sdebug_unmap_granularity = DEF_UNMAP_GRANULARITY; 773 static unsigned int sdebug_unmap_max_blocks = DEF_UNMAP_MAX_BLOCKS; 774 static unsigned int sdebug_unmap_max_desc = DEF_UNMAP_MAX_DESC; 775 static unsigned int sdebug_write_same_length = DEF_WRITESAME_LENGTH; 776 static int sdebug_uuid_ctl = DEF_UUID_CTL; 777 static bool sdebug_random = DEF_RANDOM; 778 static bool sdebug_per_host_store = DEF_PER_HOST_STORE; 779 static bool sdebug_removable = DEF_REMOVABLE; 780 static bool sdebug_clustering; 781 static bool sdebug_host_lock = DEF_HOST_LOCK; 782 static bool sdebug_strict = DEF_STRICT; 783 static bool sdebug_any_injecting_opt; 784 static bool sdebug_verbose; 785 static bool have_dif_prot; 786 static bool write_since_sync; 787 static bool sdebug_statistics = DEF_STATISTICS; 788 static bool sdebug_wp; 789 /* Following enum: 0: no zbc, def; 1: host aware; 2: host managed */ 790 static enum blk_zoned_model sdeb_zbc_model = BLK_ZONED_NONE; 791 static char *sdeb_zbc_model_s; 792 793 enum sam_lun_addr_method {SAM_LUN_AM_PERIPHERAL = 0x0, 794 SAM_LUN_AM_FLAT = 0x1, 795 SAM_LUN_AM_LOGICAL_UNIT = 0x2, 796 SAM_LUN_AM_EXTENDED = 0x3}; 797 static enum sam_lun_addr_method sdebug_lun_am = SAM_LUN_AM_PERIPHERAL; 798 static int sdebug_lun_am_i = (int)SAM_LUN_AM_PERIPHERAL; 799 800 static unsigned int sdebug_store_sectors; 801 static sector_t sdebug_capacity; /* in sectors */ 802 803 /* old BIOS stuff, kernel may get rid of them but some mode sense pages 804 may still need them */ 805 static int sdebug_heads; /* heads per disk */ 806 static int sdebug_cylinders_per; /* cylinders per surface */ 807 static int sdebug_sectors_per; /* sectors per cylinder */ 808 809 static LIST_HEAD(sdebug_host_list); 810 static DEFINE_SPINLOCK(sdebug_host_list_lock); 811 812 static struct xarray per_store_arr; 813 static struct xarray *per_store_ap = &per_store_arr; 814 static int sdeb_first_idx = -1; /* invalid index ==> none created */ 815 static int sdeb_most_recent_idx = -1; 816 static DEFINE_RWLOCK(sdeb_fake_rw_lck); /* need a RW lock when fake_rw=1 */ 817 818 static unsigned long map_size; 819 static int num_aborts; 820 static int num_dev_resets; 821 static int num_target_resets; 822 static int num_bus_resets; 823 static int num_host_resets; 824 static int dix_writes; 825 static int dix_reads; 826 static int dif_errors; 827 828 /* ZBC global data */ 829 static bool sdeb_zbc_in_use; /* true for host-aware and host-managed disks */ 830 static int sdeb_zbc_zone_size_mb; 831 static int sdeb_zbc_max_open = DEF_ZBC_MAX_OPEN_ZONES; 832 static int sdeb_zbc_nr_conv = DEF_ZBC_NR_CONV_ZONES; 833 834 static int submit_queues = DEF_SUBMIT_QUEUES; /* > 1 for multi-queue (mq) */ 835 static int poll_queues; /* iouring iopoll interface.*/ 836 static struct sdebug_queue *sdebug_q_arr; /* ptr to array of submit queues */ 837 838 static DEFINE_RWLOCK(atomic_rw); 839 static DEFINE_RWLOCK(atomic_rw2); 840 841 static rwlock_t *ramdisk_lck_a[2]; 842 843 static char sdebug_proc_name[] = MY_NAME; 844 static const char *my_name = MY_NAME; 845 846 static struct bus_type pseudo_lld_bus; 847 848 static struct device_driver sdebug_driverfs_driver = { 849 .name = sdebug_proc_name, 850 .bus = &pseudo_lld_bus, 851 }; 852 853 static const int check_condition_result = 854 SAM_STAT_CHECK_CONDITION; 855 856 static const int illegal_condition_result = 857 (DID_ABORT << 16) | SAM_STAT_CHECK_CONDITION; 858 859 static const int device_qfull_result = 860 (DID_OK << 16) | SAM_STAT_TASK_SET_FULL; 861 862 static const int condition_met_result = SAM_STAT_CONDITION_MET; 863 864 865 /* Only do the extra work involved in logical block provisioning if one or 866 * more of the lbpu, lbpws or lbpws10 parameters are given and we are doing 867 * real reads and writes (i.e. not skipping them for speed). 868 */ 869 static inline bool scsi_debug_lbp(void) 870 { 871 return 0 == sdebug_fake_rw && 872 (sdebug_lbpu || sdebug_lbpws || sdebug_lbpws10); 873 } 874 875 static void *lba2fake_store(struct sdeb_store_info *sip, 876 unsigned long long lba) 877 { 878 struct sdeb_store_info *lsip = sip; 879 880 lba = do_div(lba, sdebug_store_sectors); 881 if (!sip || !sip->storep) { 882 WARN_ON_ONCE(true); 883 lsip = xa_load(per_store_ap, 0); /* should never be NULL */ 884 } 885 return lsip->storep + lba * sdebug_sector_size; 886 } 887 888 static struct t10_pi_tuple *dif_store(struct sdeb_store_info *sip, 889 sector_t sector) 890 { 891 sector = sector_div(sector, sdebug_store_sectors); 892 893 return sip->dif_storep + sector; 894 } 895 896 static void sdebug_max_tgts_luns(void) 897 { 898 struct sdebug_host_info *sdbg_host; 899 struct Scsi_Host *hpnt; 900 901 spin_lock(&sdebug_host_list_lock); 902 list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) { 903 hpnt = sdbg_host->shost; 904 if ((hpnt->this_id >= 0) && 905 (sdebug_num_tgts > hpnt->this_id)) 906 hpnt->max_id = sdebug_num_tgts + 1; 907 else 908 hpnt->max_id = sdebug_num_tgts; 909 /* sdebug_max_luns; */ 910 hpnt->max_lun = SCSI_W_LUN_REPORT_LUNS + 1; 911 } 912 spin_unlock(&sdebug_host_list_lock); 913 } 914 915 enum sdeb_cmd_data {SDEB_IN_DATA = 0, SDEB_IN_CDB = 1}; 916 917 /* Set in_bit to -1 to indicate no bit position of invalid field */ 918 static void mk_sense_invalid_fld(struct scsi_cmnd *scp, 919 enum sdeb_cmd_data c_d, 920 int in_byte, int in_bit) 921 { 922 unsigned char *sbuff; 923 u8 sks[4]; 924 int sl, asc; 925 926 sbuff = scp->sense_buffer; 927 if (!sbuff) { 928 sdev_printk(KERN_ERR, scp->device, 929 "%s: sense_buffer is NULL\n", __func__); 930 return; 931 } 932 asc = c_d ? INVALID_FIELD_IN_CDB : INVALID_FIELD_IN_PARAM_LIST; 933 memset(sbuff, 0, SCSI_SENSE_BUFFERSIZE); 934 scsi_build_sense(scp, sdebug_dsense, ILLEGAL_REQUEST, asc, 0); 935 memset(sks, 0, sizeof(sks)); 936 sks[0] = 0x80; 937 if (c_d) 938 sks[0] |= 0x40; 939 if (in_bit >= 0) { 940 sks[0] |= 0x8; 941 sks[0] |= 0x7 & in_bit; 942 } 943 put_unaligned_be16(in_byte, sks + 1); 944 if (sdebug_dsense) { 945 sl = sbuff[7] + 8; 946 sbuff[7] = sl; 947 sbuff[sl] = 0x2; 948 sbuff[sl + 1] = 0x6; 949 memcpy(sbuff + sl + 4, sks, 3); 950 } else 951 memcpy(sbuff + 15, sks, 3); 952 if (sdebug_verbose) 953 sdev_printk(KERN_INFO, scp->device, "%s: [sense_key,asc,ascq" 954 "]: [0x5,0x%x,0x0] %c byte=%d, bit=%d\n", 955 my_name, asc, c_d ? 'C' : 'D', in_byte, in_bit); 956 } 957 958 static void mk_sense_buffer(struct scsi_cmnd *scp, int key, int asc, int asq) 959 { 960 if (!scp->sense_buffer) { 961 sdev_printk(KERN_ERR, scp->device, 962 "%s: sense_buffer is NULL\n", __func__); 963 return; 964 } 965 memset(scp->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE); 966 967 scsi_build_sense(scp, sdebug_dsense, key, asc, asq); 968 969 if (sdebug_verbose) 970 sdev_printk(KERN_INFO, scp->device, 971 "%s: [sense_key,asc,ascq]: [0x%x,0x%x,0x%x]\n", 972 my_name, key, asc, asq); 973 } 974 975 static void mk_sense_invalid_opcode(struct scsi_cmnd *scp) 976 { 977 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_OPCODE, 0); 978 } 979 980 static int scsi_debug_ioctl(struct scsi_device *dev, unsigned int cmd, 981 void __user *arg) 982 { 983 if (sdebug_verbose) { 984 if (0x1261 == cmd) 985 sdev_printk(KERN_INFO, dev, 986 "%s: BLKFLSBUF [0x1261]\n", __func__); 987 else if (0x5331 == cmd) 988 sdev_printk(KERN_INFO, dev, 989 "%s: CDROM_GET_CAPABILITY [0x5331]\n", 990 __func__); 991 else 992 sdev_printk(KERN_INFO, dev, "%s: cmd=0x%x\n", 993 __func__, cmd); 994 } 995 return -EINVAL; 996 /* return -ENOTTY; // correct return but upsets fdisk */ 997 } 998 999 static void config_cdb_len(struct scsi_device *sdev) 1000 { 1001 switch (sdebug_cdb_len) { 1002 case 6: /* suggest 6 byte READ, WRITE and MODE SENSE/SELECT */ 1003 sdev->use_10_for_rw = false; 1004 sdev->use_16_for_rw = false; 1005 sdev->use_10_for_ms = false; 1006 break; 1007 case 10: /* suggest 10 byte RWs and 6 byte MODE SENSE/SELECT */ 1008 sdev->use_10_for_rw = true; 1009 sdev->use_16_for_rw = false; 1010 sdev->use_10_for_ms = false; 1011 break; 1012 case 12: /* suggest 10 byte RWs and 10 byte MODE SENSE/SELECT */ 1013 sdev->use_10_for_rw = true; 1014 sdev->use_16_for_rw = false; 1015 sdev->use_10_for_ms = true; 1016 break; 1017 case 16: 1018 sdev->use_10_for_rw = false; 1019 sdev->use_16_for_rw = true; 1020 sdev->use_10_for_ms = true; 1021 break; 1022 case 32: /* No knobs to suggest this so same as 16 for now */ 1023 sdev->use_10_for_rw = false; 1024 sdev->use_16_for_rw = true; 1025 sdev->use_10_for_ms = true; 1026 break; 1027 default: 1028 pr_warn("unexpected cdb_len=%d, force to 10\n", 1029 sdebug_cdb_len); 1030 sdev->use_10_for_rw = true; 1031 sdev->use_16_for_rw = false; 1032 sdev->use_10_for_ms = false; 1033 sdebug_cdb_len = 10; 1034 break; 1035 } 1036 } 1037 1038 static void all_config_cdb_len(void) 1039 { 1040 struct sdebug_host_info *sdbg_host; 1041 struct Scsi_Host *shost; 1042 struct scsi_device *sdev; 1043 1044 spin_lock(&sdebug_host_list_lock); 1045 list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) { 1046 shost = sdbg_host->shost; 1047 shost_for_each_device(sdev, shost) { 1048 config_cdb_len(sdev); 1049 } 1050 } 1051 spin_unlock(&sdebug_host_list_lock); 1052 } 1053 1054 static void clear_luns_changed_on_target(struct sdebug_dev_info *devip) 1055 { 1056 struct sdebug_host_info *sdhp; 1057 struct sdebug_dev_info *dp; 1058 1059 spin_lock(&sdebug_host_list_lock); 1060 list_for_each_entry(sdhp, &sdebug_host_list, host_list) { 1061 list_for_each_entry(dp, &sdhp->dev_info_list, dev_list) { 1062 if ((devip->sdbg_host == dp->sdbg_host) && 1063 (devip->target == dp->target)) 1064 clear_bit(SDEBUG_UA_LUNS_CHANGED, dp->uas_bm); 1065 } 1066 } 1067 spin_unlock(&sdebug_host_list_lock); 1068 } 1069 1070 static int make_ua(struct scsi_cmnd *scp, struct sdebug_dev_info *devip) 1071 { 1072 int k; 1073 1074 k = find_first_bit(devip->uas_bm, SDEBUG_NUM_UAS); 1075 if (k != SDEBUG_NUM_UAS) { 1076 const char *cp = NULL; 1077 1078 switch (k) { 1079 case SDEBUG_UA_POR: 1080 mk_sense_buffer(scp, UNIT_ATTENTION, UA_RESET_ASC, 1081 POWER_ON_RESET_ASCQ); 1082 if (sdebug_verbose) 1083 cp = "power on reset"; 1084 break; 1085 case SDEBUG_UA_BUS_RESET: 1086 mk_sense_buffer(scp, UNIT_ATTENTION, UA_RESET_ASC, 1087 BUS_RESET_ASCQ); 1088 if (sdebug_verbose) 1089 cp = "bus reset"; 1090 break; 1091 case SDEBUG_UA_MODE_CHANGED: 1092 mk_sense_buffer(scp, UNIT_ATTENTION, UA_CHANGED_ASC, 1093 MODE_CHANGED_ASCQ); 1094 if (sdebug_verbose) 1095 cp = "mode parameters changed"; 1096 break; 1097 case SDEBUG_UA_CAPACITY_CHANGED: 1098 mk_sense_buffer(scp, UNIT_ATTENTION, UA_CHANGED_ASC, 1099 CAPACITY_CHANGED_ASCQ); 1100 if (sdebug_verbose) 1101 cp = "capacity data changed"; 1102 break; 1103 case SDEBUG_UA_MICROCODE_CHANGED: 1104 mk_sense_buffer(scp, UNIT_ATTENTION, 1105 TARGET_CHANGED_ASC, 1106 MICROCODE_CHANGED_ASCQ); 1107 if (sdebug_verbose) 1108 cp = "microcode has been changed"; 1109 break; 1110 case SDEBUG_UA_MICROCODE_CHANGED_WO_RESET: 1111 mk_sense_buffer(scp, UNIT_ATTENTION, 1112 TARGET_CHANGED_ASC, 1113 MICROCODE_CHANGED_WO_RESET_ASCQ); 1114 if (sdebug_verbose) 1115 cp = "microcode has been changed without reset"; 1116 break; 1117 case SDEBUG_UA_LUNS_CHANGED: 1118 /* 1119 * SPC-3 behavior is to report a UNIT ATTENTION with 1120 * ASC/ASCQ REPORTED LUNS DATA HAS CHANGED on every LUN 1121 * on the target, until a REPORT LUNS command is 1122 * received. SPC-4 behavior is to report it only once. 1123 * NOTE: sdebug_scsi_level does not use the same 1124 * values as struct scsi_device->scsi_level. 1125 */ 1126 if (sdebug_scsi_level >= 6) /* SPC-4 and above */ 1127 clear_luns_changed_on_target(devip); 1128 mk_sense_buffer(scp, UNIT_ATTENTION, 1129 TARGET_CHANGED_ASC, 1130 LUNS_CHANGED_ASCQ); 1131 if (sdebug_verbose) 1132 cp = "reported luns data has changed"; 1133 break; 1134 default: 1135 pr_warn("unexpected unit attention code=%d\n", k); 1136 if (sdebug_verbose) 1137 cp = "unknown"; 1138 break; 1139 } 1140 clear_bit(k, devip->uas_bm); 1141 if (sdebug_verbose) 1142 sdev_printk(KERN_INFO, scp->device, 1143 "%s reports: Unit attention: %s\n", 1144 my_name, cp); 1145 return check_condition_result; 1146 } 1147 return 0; 1148 } 1149 1150 /* Build SCSI "data-in" buffer. Returns 0 if ok else (DID_ERROR << 16). */ 1151 static int fill_from_dev_buffer(struct scsi_cmnd *scp, unsigned char *arr, 1152 int arr_len) 1153 { 1154 int act_len; 1155 struct scsi_data_buffer *sdb = &scp->sdb; 1156 1157 if (!sdb->length) 1158 return 0; 1159 if (scp->sc_data_direction != DMA_FROM_DEVICE) 1160 return DID_ERROR << 16; 1161 1162 act_len = sg_copy_from_buffer(sdb->table.sgl, sdb->table.nents, 1163 arr, arr_len); 1164 scsi_set_resid(scp, scsi_bufflen(scp) - act_len); 1165 1166 return 0; 1167 } 1168 1169 /* Partial build of SCSI "data-in" buffer. Returns 0 if ok else 1170 * (DID_ERROR << 16). Can write to offset in data-in buffer. If multiple 1171 * calls, not required to write in ascending offset order. Assumes resid 1172 * set to scsi_bufflen() prior to any calls. 1173 */ 1174 static int p_fill_from_dev_buffer(struct scsi_cmnd *scp, const void *arr, 1175 int arr_len, unsigned int off_dst) 1176 { 1177 unsigned int act_len, n; 1178 struct scsi_data_buffer *sdb = &scp->sdb; 1179 off_t skip = off_dst; 1180 1181 if (sdb->length <= off_dst) 1182 return 0; 1183 if (scp->sc_data_direction != DMA_FROM_DEVICE) 1184 return DID_ERROR << 16; 1185 1186 act_len = sg_pcopy_from_buffer(sdb->table.sgl, sdb->table.nents, 1187 arr, arr_len, skip); 1188 pr_debug("%s: off_dst=%u, scsi_bufflen=%u, act_len=%u, resid=%d\n", 1189 __func__, off_dst, scsi_bufflen(scp), act_len, 1190 scsi_get_resid(scp)); 1191 n = scsi_bufflen(scp) - (off_dst + act_len); 1192 scsi_set_resid(scp, min_t(u32, scsi_get_resid(scp), n)); 1193 return 0; 1194 } 1195 1196 /* Fetches from SCSI "data-out" buffer. Returns number of bytes fetched into 1197 * 'arr' or -1 if error. 1198 */ 1199 static int fetch_to_dev_buffer(struct scsi_cmnd *scp, unsigned char *arr, 1200 int arr_len) 1201 { 1202 if (!scsi_bufflen(scp)) 1203 return 0; 1204 if (scp->sc_data_direction != DMA_TO_DEVICE) 1205 return -1; 1206 1207 return scsi_sg_copy_to_buffer(scp, arr, arr_len); 1208 } 1209 1210 1211 static char sdebug_inq_vendor_id[9] = "Linux "; 1212 static char sdebug_inq_product_id[17] = "scsi_debug "; 1213 static char sdebug_inq_product_rev[5] = SDEBUG_VERSION; 1214 /* Use some locally assigned NAAs for SAS addresses. */ 1215 static const u64 naa3_comp_a = 0x3222222000000000ULL; 1216 static const u64 naa3_comp_b = 0x3333333000000000ULL; 1217 static const u64 naa3_comp_c = 0x3111111000000000ULL; 1218 1219 /* Device identification VPD page. Returns number of bytes placed in arr */ 1220 static int inquiry_vpd_83(unsigned char *arr, int port_group_id, 1221 int target_dev_id, int dev_id_num, 1222 const char *dev_id_str, int dev_id_str_len, 1223 const uuid_t *lu_name) 1224 { 1225 int num, port_a; 1226 char b[32]; 1227 1228 port_a = target_dev_id + 1; 1229 /* T10 vendor identifier field format (faked) */ 1230 arr[0] = 0x2; /* ASCII */ 1231 arr[1] = 0x1; 1232 arr[2] = 0x0; 1233 memcpy(&arr[4], sdebug_inq_vendor_id, 8); 1234 memcpy(&arr[12], sdebug_inq_product_id, 16); 1235 memcpy(&arr[28], dev_id_str, dev_id_str_len); 1236 num = 8 + 16 + dev_id_str_len; 1237 arr[3] = num; 1238 num += 4; 1239 if (dev_id_num >= 0) { 1240 if (sdebug_uuid_ctl) { 1241 /* Locally assigned UUID */ 1242 arr[num++] = 0x1; /* binary (not necessarily sas) */ 1243 arr[num++] = 0xa; /* PIV=0, lu, naa */ 1244 arr[num++] = 0x0; 1245 arr[num++] = 0x12; 1246 arr[num++] = 0x10; /* uuid type=1, locally assigned */ 1247 arr[num++] = 0x0; 1248 memcpy(arr + num, lu_name, 16); 1249 num += 16; 1250 } else { 1251 /* NAA-3, Logical unit identifier (binary) */ 1252 arr[num++] = 0x1; /* binary (not necessarily sas) */ 1253 arr[num++] = 0x3; /* PIV=0, lu, naa */ 1254 arr[num++] = 0x0; 1255 arr[num++] = 0x8; 1256 put_unaligned_be64(naa3_comp_b + dev_id_num, arr + num); 1257 num += 8; 1258 } 1259 /* Target relative port number */ 1260 arr[num++] = 0x61; /* proto=sas, binary */ 1261 arr[num++] = 0x94; /* PIV=1, target port, rel port */ 1262 arr[num++] = 0x0; /* reserved */ 1263 arr[num++] = 0x4; /* length */ 1264 arr[num++] = 0x0; /* reserved */ 1265 arr[num++] = 0x0; /* reserved */ 1266 arr[num++] = 0x0; 1267 arr[num++] = 0x1; /* relative port A */ 1268 } 1269 /* NAA-3, Target port identifier */ 1270 arr[num++] = 0x61; /* proto=sas, binary */ 1271 arr[num++] = 0x93; /* piv=1, target port, naa */ 1272 arr[num++] = 0x0; 1273 arr[num++] = 0x8; 1274 put_unaligned_be64(naa3_comp_a + port_a, arr + num); 1275 num += 8; 1276 /* NAA-3, Target port group identifier */ 1277 arr[num++] = 0x61; /* proto=sas, binary */ 1278 arr[num++] = 0x95; /* piv=1, target port group id */ 1279 arr[num++] = 0x0; 1280 arr[num++] = 0x4; 1281 arr[num++] = 0; 1282 arr[num++] = 0; 1283 put_unaligned_be16(port_group_id, arr + num); 1284 num += 2; 1285 /* NAA-3, Target device identifier */ 1286 arr[num++] = 0x61; /* proto=sas, binary */ 1287 arr[num++] = 0xa3; /* piv=1, target device, naa */ 1288 arr[num++] = 0x0; 1289 arr[num++] = 0x8; 1290 put_unaligned_be64(naa3_comp_a + target_dev_id, arr + num); 1291 num += 8; 1292 /* SCSI name string: Target device identifier */ 1293 arr[num++] = 0x63; /* proto=sas, UTF-8 */ 1294 arr[num++] = 0xa8; /* piv=1, target device, SCSI name string */ 1295 arr[num++] = 0x0; 1296 arr[num++] = 24; 1297 memcpy(arr + num, "naa.32222220", 12); 1298 num += 12; 1299 snprintf(b, sizeof(b), "%08X", target_dev_id); 1300 memcpy(arr + num, b, 8); 1301 num += 8; 1302 memset(arr + num, 0, 4); 1303 num += 4; 1304 return num; 1305 } 1306 1307 static unsigned char vpd84_data[] = { 1308 /* from 4th byte */ 0x22,0x22,0x22,0x0,0xbb,0x0, 1309 0x22,0x22,0x22,0x0,0xbb,0x1, 1310 0x22,0x22,0x22,0x0,0xbb,0x2, 1311 }; 1312 1313 /* Software interface identification VPD page */ 1314 static int inquiry_vpd_84(unsigned char *arr) 1315 { 1316 memcpy(arr, vpd84_data, sizeof(vpd84_data)); 1317 return sizeof(vpd84_data); 1318 } 1319 1320 /* Management network addresses VPD page */ 1321 static int inquiry_vpd_85(unsigned char *arr) 1322 { 1323 int num = 0; 1324 const char *na1 = "https://www.kernel.org/config"; 1325 const char *na2 = "http://www.kernel.org/log"; 1326 int plen, olen; 1327 1328 arr[num++] = 0x1; /* lu, storage config */ 1329 arr[num++] = 0x0; /* reserved */ 1330 arr[num++] = 0x0; 1331 olen = strlen(na1); 1332 plen = olen + 1; 1333 if (plen % 4) 1334 plen = ((plen / 4) + 1) * 4; 1335 arr[num++] = plen; /* length, null termianted, padded */ 1336 memcpy(arr + num, na1, olen); 1337 memset(arr + num + olen, 0, plen - olen); 1338 num += plen; 1339 1340 arr[num++] = 0x4; /* lu, logging */ 1341 arr[num++] = 0x0; /* reserved */ 1342 arr[num++] = 0x0; 1343 olen = strlen(na2); 1344 plen = olen + 1; 1345 if (plen % 4) 1346 plen = ((plen / 4) + 1) * 4; 1347 arr[num++] = plen; /* length, null terminated, padded */ 1348 memcpy(arr + num, na2, olen); 1349 memset(arr + num + olen, 0, plen - olen); 1350 num += plen; 1351 1352 return num; 1353 } 1354 1355 /* SCSI ports VPD page */ 1356 static int inquiry_vpd_88(unsigned char *arr, int target_dev_id) 1357 { 1358 int num = 0; 1359 int port_a, port_b; 1360 1361 port_a = target_dev_id + 1; 1362 port_b = port_a + 1; 1363 arr[num++] = 0x0; /* reserved */ 1364 arr[num++] = 0x0; /* reserved */ 1365 arr[num++] = 0x0; 1366 arr[num++] = 0x1; /* relative port 1 (primary) */ 1367 memset(arr + num, 0, 6); 1368 num += 6; 1369 arr[num++] = 0x0; 1370 arr[num++] = 12; /* length tp descriptor */ 1371 /* naa-5 target port identifier (A) */ 1372 arr[num++] = 0x61; /* proto=sas, binary */ 1373 arr[num++] = 0x93; /* PIV=1, target port, NAA */ 1374 arr[num++] = 0x0; /* reserved */ 1375 arr[num++] = 0x8; /* length */ 1376 put_unaligned_be64(naa3_comp_a + port_a, arr + num); 1377 num += 8; 1378 arr[num++] = 0x0; /* reserved */ 1379 arr[num++] = 0x0; /* reserved */ 1380 arr[num++] = 0x0; 1381 arr[num++] = 0x2; /* relative port 2 (secondary) */ 1382 memset(arr + num, 0, 6); 1383 num += 6; 1384 arr[num++] = 0x0; 1385 arr[num++] = 12; /* length tp descriptor */ 1386 /* naa-5 target port identifier (B) */ 1387 arr[num++] = 0x61; /* proto=sas, binary */ 1388 arr[num++] = 0x93; /* PIV=1, target port, NAA */ 1389 arr[num++] = 0x0; /* reserved */ 1390 arr[num++] = 0x8; /* length */ 1391 put_unaligned_be64(naa3_comp_a + port_b, arr + num); 1392 num += 8; 1393 1394 return num; 1395 } 1396 1397 1398 static unsigned char vpd89_data[] = { 1399 /* from 4th byte */ 0,0,0,0, 1400 'l','i','n','u','x',' ',' ',' ', 1401 'S','A','T',' ','s','c','s','i','_','d','e','b','u','g',' ',' ', 1402 '1','2','3','4', 1403 0x34,0,0,0,1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0, 1404 0xec,0,0,0, 1405 0x5a,0xc,0xff,0x3f,0x37,0xc8,0x10,0,0,0,0,0,0x3f,0,0,0, 1406 0,0,0,0,0x58,0x58,0x58,0x58,0x58,0x58,0x58,0x58,0x20,0x20,0x20,0x20, 1407 0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0,0,0,0x40,0x4,0,0x2e,0x33, 1408 0x38,0x31,0x20,0x20,0x20,0x20,0x54,0x53,0x38,0x33,0x30,0x30,0x33,0x31, 1409 0x53,0x41, 1410 0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20, 1411 0x20,0x20, 1412 0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20, 1413 0x10,0x80, 1414 0,0,0,0x2f,0,0,0,0x2,0,0x2,0x7,0,0xff,0xff,0x1,0, 1415 0x3f,0,0xc1,0xff,0x3e,0,0x10,0x1,0xb0,0xf8,0x50,0x9,0,0,0x7,0, 1416 0x3,0,0x78,0,0x78,0,0xf0,0,0x78,0,0,0,0,0,0,0, 1417 0,0,0,0,0,0,0,0,0x2,0,0,0,0,0,0,0, 1418 0x7e,0,0x1b,0,0x6b,0x34,0x1,0x7d,0x3,0x40,0x69,0x34,0x1,0x3c,0x3,0x40, 1419 0x7f,0x40,0,0,0,0,0xfe,0xfe,0,0,0,0,0,0xfe,0,0, 1420 0,0,0,0,0,0,0,0,0xb0,0xf8,0x50,0x9,0,0,0,0, 1421 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 1422 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 1423 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 1424 0x1,0,0xb0,0xf8,0x50,0x9,0xb0,0xf8,0x50,0x9,0x20,0x20,0x2,0,0xb6,0x42, 1425 0,0x80,0x8a,0,0x6,0x3c,0xa,0x3c,0xff,0xff,0xc6,0x7,0,0x1,0,0x8, 1426 0xf0,0xf,0,0x10,0x2,0,0x30,0,0,0,0,0,0,0,0x6,0xfe, 1427 0,0,0x2,0,0x50,0,0x8a,0,0x4f,0x95,0,0,0x21,0,0xb,0, 1428 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 1429 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 1430 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 1431 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 1432 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 1433 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 1434 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 1435 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 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 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 1439 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0xa5,0x51, 1440 }; 1441 1442 /* ATA Information VPD page */ 1443 static int inquiry_vpd_89(unsigned char *arr) 1444 { 1445 memcpy(arr, vpd89_data, sizeof(vpd89_data)); 1446 return sizeof(vpd89_data); 1447 } 1448 1449 1450 static unsigned char vpdb0_data[] = { 1451 /* from 4th byte */ 0,0,0,4, 0,0,0x4,0, 0,0,0,64, 1452 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 1453 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 1454 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 1455 }; 1456 1457 /* Block limits VPD page (SBC-3) */ 1458 static int inquiry_vpd_b0(unsigned char *arr) 1459 { 1460 unsigned int gran; 1461 1462 memcpy(arr, vpdb0_data, sizeof(vpdb0_data)); 1463 1464 /* Optimal transfer length granularity */ 1465 if (sdebug_opt_xferlen_exp != 0 && 1466 sdebug_physblk_exp < sdebug_opt_xferlen_exp) 1467 gran = 1 << sdebug_opt_xferlen_exp; 1468 else 1469 gran = 1 << sdebug_physblk_exp; 1470 put_unaligned_be16(gran, arr + 2); 1471 1472 /* Maximum Transfer Length */ 1473 if (sdebug_store_sectors > 0x400) 1474 put_unaligned_be32(sdebug_store_sectors, arr + 4); 1475 1476 /* Optimal Transfer Length */ 1477 put_unaligned_be32(sdebug_opt_blks, &arr[8]); 1478 1479 if (sdebug_lbpu) { 1480 /* Maximum Unmap LBA Count */ 1481 put_unaligned_be32(sdebug_unmap_max_blocks, &arr[16]); 1482 1483 /* Maximum Unmap Block Descriptor Count */ 1484 put_unaligned_be32(sdebug_unmap_max_desc, &arr[20]); 1485 } 1486 1487 /* Unmap Granularity Alignment */ 1488 if (sdebug_unmap_alignment) { 1489 put_unaligned_be32(sdebug_unmap_alignment, &arr[28]); 1490 arr[28] |= 0x80; /* UGAVALID */ 1491 } 1492 1493 /* Optimal Unmap Granularity */ 1494 put_unaligned_be32(sdebug_unmap_granularity, &arr[24]); 1495 1496 /* Maximum WRITE SAME Length */ 1497 put_unaligned_be64(sdebug_write_same_length, &arr[32]); 1498 1499 return 0x3c; /* Mandatory page length for Logical Block Provisioning */ 1500 1501 return sizeof(vpdb0_data); 1502 } 1503 1504 /* Block device characteristics VPD page (SBC-3) */ 1505 static int inquiry_vpd_b1(struct sdebug_dev_info *devip, unsigned char *arr) 1506 { 1507 memset(arr, 0, 0x3c); 1508 arr[0] = 0; 1509 arr[1] = 1; /* non rotating medium (e.g. solid state) */ 1510 arr[2] = 0; 1511 arr[3] = 5; /* less than 1.8" */ 1512 if (devip->zmodel == BLK_ZONED_HA) 1513 arr[4] = 1 << 4; /* zoned field = 01b */ 1514 1515 return 0x3c; 1516 } 1517 1518 /* Logical block provisioning VPD page (SBC-4) */ 1519 static int inquiry_vpd_b2(unsigned char *arr) 1520 { 1521 memset(arr, 0, 0x4); 1522 arr[0] = 0; /* threshold exponent */ 1523 if (sdebug_lbpu) 1524 arr[1] = 1 << 7; 1525 if (sdebug_lbpws) 1526 arr[1] |= 1 << 6; 1527 if (sdebug_lbpws10) 1528 arr[1] |= 1 << 5; 1529 if (sdebug_lbprz && scsi_debug_lbp()) 1530 arr[1] |= (sdebug_lbprz & 0x7) << 2; /* sbc4r07 and later */ 1531 /* anc_sup=0; dp=0 (no provisioning group descriptor) */ 1532 /* minimum_percentage=0; provisioning_type=0 (unknown) */ 1533 /* threshold_percentage=0 */ 1534 return 0x4; 1535 } 1536 1537 /* Zoned block device characteristics VPD page (ZBC mandatory) */ 1538 static int inquiry_vpd_b6(struct sdebug_dev_info *devip, unsigned char *arr) 1539 { 1540 memset(arr, 0, 0x3c); 1541 arr[0] = 0x1; /* set URSWRZ (unrestricted read in seq. wr req zone) */ 1542 /* 1543 * Set Optimal number of open sequential write preferred zones and 1544 * Optimal number of non-sequentially written sequential write 1545 * preferred zones fields to 'not reported' (0xffffffff). Leave other 1546 * fields set to zero, apart from Max. number of open swrz_s field. 1547 */ 1548 put_unaligned_be32(0xffffffff, &arr[4]); 1549 put_unaligned_be32(0xffffffff, &arr[8]); 1550 if (sdeb_zbc_model == BLK_ZONED_HM && devip->max_open) 1551 put_unaligned_be32(devip->max_open, &arr[12]); 1552 else 1553 put_unaligned_be32(0xffffffff, &arr[12]); 1554 return 0x3c; 1555 } 1556 1557 #define SDEBUG_LONG_INQ_SZ 96 1558 #define SDEBUG_MAX_INQ_ARR_SZ 584 1559 1560 static int resp_inquiry(struct scsi_cmnd *scp, struct sdebug_dev_info *devip) 1561 { 1562 unsigned char pq_pdt; 1563 unsigned char *arr; 1564 unsigned char *cmd = scp->cmnd; 1565 u32 alloc_len, n; 1566 int ret; 1567 bool have_wlun, is_disk, is_zbc, is_disk_zbc; 1568 1569 alloc_len = get_unaligned_be16(cmd + 3); 1570 arr = kzalloc(SDEBUG_MAX_INQ_ARR_SZ, GFP_ATOMIC); 1571 if (! arr) 1572 return DID_REQUEUE << 16; 1573 is_disk = (sdebug_ptype == TYPE_DISK); 1574 is_zbc = (devip->zmodel != BLK_ZONED_NONE); 1575 is_disk_zbc = (is_disk || is_zbc); 1576 have_wlun = scsi_is_wlun(scp->device->lun); 1577 if (have_wlun) 1578 pq_pdt = TYPE_WLUN; /* present, wlun */ 1579 else if (sdebug_no_lun_0 && (devip->lun == SDEBUG_LUN_0_VAL)) 1580 pq_pdt = 0x7f; /* not present, PQ=3, PDT=0x1f */ 1581 else 1582 pq_pdt = (sdebug_ptype & 0x1f); 1583 arr[0] = pq_pdt; 1584 if (0x2 & cmd[1]) { /* CMDDT bit set */ 1585 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 1); 1586 kfree(arr); 1587 return check_condition_result; 1588 } else if (0x1 & cmd[1]) { /* EVPD bit set */ 1589 int lu_id_num, port_group_id, target_dev_id; 1590 u32 len; 1591 char lu_id_str[6]; 1592 int host_no = devip->sdbg_host->shost->host_no; 1593 1594 port_group_id = (((host_no + 1) & 0x7f) << 8) + 1595 (devip->channel & 0x7f); 1596 if (sdebug_vpd_use_hostno == 0) 1597 host_no = 0; 1598 lu_id_num = have_wlun ? -1 : (((host_no + 1) * 2000) + 1599 (devip->target * 1000) + devip->lun); 1600 target_dev_id = ((host_no + 1) * 2000) + 1601 (devip->target * 1000) - 3; 1602 len = scnprintf(lu_id_str, 6, "%d", lu_id_num); 1603 if (0 == cmd[2]) { /* supported vital product data pages */ 1604 arr[1] = cmd[2]; /*sanity */ 1605 n = 4; 1606 arr[n++] = 0x0; /* this page */ 1607 arr[n++] = 0x80; /* unit serial number */ 1608 arr[n++] = 0x83; /* device identification */ 1609 arr[n++] = 0x84; /* software interface ident. */ 1610 arr[n++] = 0x85; /* management network addresses */ 1611 arr[n++] = 0x86; /* extended inquiry */ 1612 arr[n++] = 0x87; /* mode page policy */ 1613 arr[n++] = 0x88; /* SCSI ports */ 1614 if (is_disk_zbc) { /* SBC or ZBC */ 1615 arr[n++] = 0x89; /* ATA information */ 1616 arr[n++] = 0xb0; /* Block limits */ 1617 arr[n++] = 0xb1; /* Block characteristics */ 1618 if (is_disk) 1619 arr[n++] = 0xb2; /* LB Provisioning */ 1620 if (is_zbc) 1621 arr[n++] = 0xb6; /* ZB dev. char. */ 1622 } 1623 arr[3] = n - 4; /* number of supported VPD pages */ 1624 } else if (0x80 == cmd[2]) { /* unit serial number */ 1625 arr[1] = cmd[2]; /*sanity */ 1626 arr[3] = len; 1627 memcpy(&arr[4], lu_id_str, len); 1628 } else if (0x83 == cmd[2]) { /* device identification */ 1629 arr[1] = cmd[2]; /*sanity */ 1630 arr[3] = inquiry_vpd_83(&arr[4], port_group_id, 1631 target_dev_id, lu_id_num, 1632 lu_id_str, len, 1633 &devip->lu_name); 1634 } else if (0x84 == cmd[2]) { /* Software interface ident. */ 1635 arr[1] = cmd[2]; /*sanity */ 1636 arr[3] = inquiry_vpd_84(&arr[4]); 1637 } else if (0x85 == cmd[2]) { /* Management network addresses */ 1638 arr[1] = cmd[2]; /*sanity */ 1639 arr[3] = inquiry_vpd_85(&arr[4]); 1640 } else if (0x86 == cmd[2]) { /* extended inquiry */ 1641 arr[1] = cmd[2]; /*sanity */ 1642 arr[3] = 0x3c; /* number of following entries */ 1643 if (sdebug_dif == T10_PI_TYPE3_PROTECTION) 1644 arr[4] = 0x4; /* SPT: GRD_CHK:1 */ 1645 else if (have_dif_prot) 1646 arr[4] = 0x5; /* SPT: GRD_CHK:1, REF_CHK:1 */ 1647 else 1648 arr[4] = 0x0; /* no protection stuff */ 1649 arr[5] = 0x7; /* head of q, ordered + simple q's */ 1650 } else if (0x87 == cmd[2]) { /* mode page policy */ 1651 arr[1] = cmd[2]; /*sanity */ 1652 arr[3] = 0x8; /* number of following entries */ 1653 arr[4] = 0x2; /* disconnect-reconnect mp */ 1654 arr[6] = 0x80; /* mlus, shared */ 1655 arr[8] = 0x18; /* protocol specific lu */ 1656 arr[10] = 0x82; /* mlus, per initiator port */ 1657 } else if (0x88 == cmd[2]) { /* SCSI Ports */ 1658 arr[1] = cmd[2]; /*sanity */ 1659 arr[3] = inquiry_vpd_88(&arr[4], target_dev_id); 1660 } else if (is_disk_zbc && 0x89 == cmd[2]) { /* ATA info */ 1661 arr[1] = cmd[2]; /*sanity */ 1662 n = inquiry_vpd_89(&arr[4]); 1663 put_unaligned_be16(n, arr + 2); 1664 } else if (is_disk_zbc && 0xb0 == cmd[2]) { /* Block limits */ 1665 arr[1] = cmd[2]; /*sanity */ 1666 arr[3] = inquiry_vpd_b0(&arr[4]); 1667 } else if (is_disk_zbc && 0xb1 == cmd[2]) { /* Block char. */ 1668 arr[1] = cmd[2]; /*sanity */ 1669 arr[3] = inquiry_vpd_b1(devip, &arr[4]); 1670 } else if (is_disk && 0xb2 == cmd[2]) { /* LB Prov. */ 1671 arr[1] = cmd[2]; /*sanity */ 1672 arr[3] = inquiry_vpd_b2(&arr[4]); 1673 } else if (is_zbc && cmd[2] == 0xb6) { /* ZB dev. charact. */ 1674 arr[1] = cmd[2]; /*sanity */ 1675 arr[3] = inquiry_vpd_b6(devip, &arr[4]); 1676 } else { 1677 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, -1); 1678 kfree(arr); 1679 return check_condition_result; 1680 } 1681 len = min_t(u32, get_unaligned_be16(arr + 2) + 4, alloc_len); 1682 ret = fill_from_dev_buffer(scp, arr, 1683 min_t(u32, len, SDEBUG_MAX_INQ_ARR_SZ)); 1684 kfree(arr); 1685 return ret; 1686 } 1687 /* drops through here for a standard inquiry */ 1688 arr[1] = sdebug_removable ? 0x80 : 0; /* Removable disk */ 1689 arr[2] = sdebug_scsi_level; 1690 arr[3] = 2; /* response_data_format==2 */ 1691 arr[4] = SDEBUG_LONG_INQ_SZ - 5; 1692 arr[5] = (int)have_dif_prot; /* PROTECT bit */ 1693 if (sdebug_vpd_use_hostno == 0) 1694 arr[5] |= 0x10; /* claim: implicit TPGS */ 1695 arr[6] = 0x10; /* claim: MultiP */ 1696 /* arr[6] |= 0x40; ... claim: EncServ (enclosure services) */ 1697 arr[7] = 0xa; /* claim: LINKED + CMDQUE */ 1698 memcpy(&arr[8], sdebug_inq_vendor_id, 8); 1699 memcpy(&arr[16], sdebug_inq_product_id, 16); 1700 memcpy(&arr[32], sdebug_inq_product_rev, 4); 1701 /* Use Vendor Specific area to place driver date in ASCII hex */ 1702 memcpy(&arr[36], sdebug_version_date, 8); 1703 /* version descriptors (2 bytes each) follow */ 1704 put_unaligned_be16(0xc0, arr + 58); /* SAM-6 no version claimed */ 1705 put_unaligned_be16(0x5c0, arr + 60); /* SPC-5 no version claimed */ 1706 n = 62; 1707 if (is_disk) { /* SBC-4 no version claimed */ 1708 put_unaligned_be16(0x600, arr + n); 1709 n += 2; 1710 } else if (sdebug_ptype == TYPE_TAPE) { /* SSC-4 rev 3 */ 1711 put_unaligned_be16(0x525, arr + n); 1712 n += 2; 1713 } else if (is_zbc) { /* ZBC BSR INCITS 536 revision 05 */ 1714 put_unaligned_be16(0x624, arr + n); 1715 n += 2; 1716 } 1717 put_unaligned_be16(0x2100, arr + n); /* SPL-4 no version claimed */ 1718 ret = fill_from_dev_buffer(scp, arr, 1719 min_t(u32, alloc_len, SDEBUG_LONG_INQ_SZ)); 1720 kfree(arr); 1721 return ret; 1722 } 1723 1724 /* See resp_iec_m_pg() for how this data is manipulated */ 1725 static unsigned char iec_m_pg[] = {0x1c, 0xa, 0x08, 0, 0, 0, 0, 0, 1726 0, 0, 0x0, 0x0}; 1727 1728 static int resp_requests(struct scsi_cmnd *scp, 1729 struct sdebug_dev_info *devip) 1730 { 1731 unsigned char *cmd = scp->cmnd; 1732 unsigned char arr[SCSI_SENSE_BUFFERSIZE]; /* assume >= 18 bytes */ 1733 bool dsense = !!(cmd[1] & 1); 1734 u32 alloc_len = cmd[4]; 1735 u32 len = 18; 1736 int stopped_state = atomic_read(&devip->stopped); 1737 1738 memset(arr, 0, sizeof(arr)); 1739 if (stopped_state > 0) { /* some "pollable" data [spc6r02: 5.12.2] */ 1740 if (dsense) { 1741 arr[0] = 0x72; 1742 arr[1] = NOT_READY; 1743 arr[2] = LOGICAL_UNIT_NOT_READY; 1744 arr[3] = (stopped_state == 2) ? 0x1 : 0x2; 1745 len = 8; 1746 } else { 1747 arr[0] = 0x70; 1748 arr[2] = NOT_READY; /* NO_SENSE in sense_key */ 1749 arr[7] = 0xa; /* 18 byte sense buffer */ 1750 arr[12] = LOGICAL_UNIT_NOT_READY; 1751 arr[13] = (stopped_state == 2) ? 0x1 : 0x2; 1752 } 1753 } else if ((iec_m_pg[2] & 0x4) && (6 == (iec_m_pg[3] & 0xf))) { 1754 /* Information exceptions control mode page: TEST=1, MRIE=6 */ 1755 if (dsense) { 1756 arr[0] = 0x72; 1757 arr[1] = 0x0; /* NO_SENSE in sense_key */ 1758 arr[2] = THRESHOLD_EXCEEDED; 1759 arr[3] = 0xff; /* Failure prediction(false) */ 1760 len = 8; 1761 } else { 1762 arr[0] = 0x70; 1763 arr[2] = 0x0; /* NO_SENSE in sense_key */ 1764 arr[7] = 0xa; /* 18 byte sense buffer */ 1765 arr[12] = THRESHOLD_EXCEEDED; 1766 arr[13] = 0xff; /* Failure prediction(false) */ 1767 } 1768 } else { /* nothing to report */ 1769 if (dsense) { 1770 len = 8; 1771 memset(arr, 0, len); 1772 arr[0] = 0x72; 1773 } else { 1774 memset(arr, 0, len); 1775 arr[0] = 0x70; 1776 arr[7] = 0xa; 1777 } 1778 } 1779 return fill_from_dev_buffer(scp, arr, min_t(u32, len, alloc_len)); 1780 } 1781 1782 static int resp_start_stop(struct scsi_cmnd *scp, struct sdebug_dev_info *devip) 1783 { 1784 unsigned char *cmd = scp->cmnd; 1785 int power_cond, want_stop, stopped_state; 1786 bool changing; 1787 1788 power_cond = (cmd[4] & 0xf0) >> 4; 1789 if (power_cond) { 1790 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 4, 7); 1791 return check_condition_result; 1792 } 1793 want_stop = !(cmd[4] & 1); 1794 stopped_state = atomic_read(&devip->stopped); 1795 if (stopped_state == 2) { 1796 ktime_t now_ts = ktime_get_boottime(); 1797 1798 if (ktime_to_ns(now_ts) > ktime_to_ns(devip->create_ts)) { 1799 u64 diff_ns = ktime_to_ns(ktime_sub(now_ts, devip->create_ts)); 1800 1801 if (diff_ns >= ((u64)sdeb_tur_ms_to_ready * 1000000)) { 1802 /* tur_ms_to_ready timer extinguished */ 1803 atomic_set(&devip->stopped, 0); 1804 stopped_state = 0; 1805 } 1806 } 1807 if (stopped_state == 2) { 1808 if (want_stop) { 1809 stopped_state = 1; /* dummy up success */ 1810 } else { /* Disallow tur_ms_to_ready delay to be overridden */ 1811 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 4, 0 /* START bit */); 1812 return check_condition_result; 1813 } 1814 } 1815 } 1816 changing = (stopped_state != want_stop); 1817 if (changing) 1818 atomic_xchg(&devip->stopped, want_stop); 1819 if (!changing || (cmd[1] & 0x1)) /* state unchanged or IMMED bit set in cdb */ 1820 return SDEG_RES_IMMED_MASK; 1821 else 1822 return 0; 1823 } 1824 1825 static sector_t get_sdebug_capacity(void) 1826 { 1827 static const unsigned int gibibyte = 1073741824; 1828 1829 if (sdebug_virtual_gb > 0) 1830 return (sector_t)sdebug_virtual_gb * 1831 (gibibyte / sdebug_sector_size); 1832 else 1833 return sdebug_store_sectors; 1834 } 1835 1836 #define SDEBUG_READCAP_ARR_SZ 8 1837 static int resp_readcap(struct scsi_cmnd *scp, 1838 struct sdebug_dev_info *devip) 1839 { 1840 unsigned char arr[SDEBUG_READCAP_ARR_SZ]; 1841 unsigned int capac; 1842 1843 /* following just in case virtual_gb changed */ 1844 sdebug_capacity = get_sdebug_capacity(); 1845 memset(arr, 0, SDEBUG_READCAP_ARR_SZ); 1846 if (sdebug_capacity < 0xffffffff) { 1847 capac = (unsigned int)sdebug_capacity - 1; 1848 put_unaligned_be32(capac, arr + 0); 1849 } else 1850 put_unaligned_be32(0xffffffff, arr + 0); 1851 put_unaligned_be16(sdebug_sector_size, arr + 6); 1852 return fill_from_dev_buffer(scp, arr, SDEBUG_READCAP_ARR_SZ); 1853 } 1854 1855 #define SDEBUG_READCAP16_ARR_SZ 32 1856 static int resp_readcap16(struct scsi_cmnd *scp, 1857 struct sdebug_dev_info *devip) 1858 { 1859 unsigned char *cmd = scp->cmnd; 1860 unsigned char arr[SDEBUG_READCAP16_ARR_SZ]; 1861 u32 alloc_len; 1862 1863 alloc_len = get_unaligned_be32(cmd + 10); 1864 /* following just in case virtual_gb changed */ 1865 sdebug_capacity = get_sdebug_capacity(); 1866 memset(arr, 0, SDEBUG_READCAP16_ARR_SZ); 1867 put_unaligned_be64((u64)(sdebug_capacity - 1), arr + 0); 1868 put_unaligned_be32(sdebug_sector_size, arr + 8); 1869 arr[13] = sdebug_physblk_exp & 0xf; 1870 arr[14] = (sdebug_lowest_aligned >> 8) & 0x3f; 1871 1872 if (scsi_debug_lbp()) { 1873 arr[14] |= 0x80; /* LBPME */ 1874 /* from sbc4r07, this LBPRZ field is 1 bit, but the LBPRZ in 1875 * the LB Provisioning VPD page is 3 bits. Note that lbprz=2 1876 * in the wider field maps to 0 in this field. 1877 */ 1878 if (sdebug_lbprz & 1) /* precisely what the draft requires */ 1879 arr[14] |= 0x40; 1880 } 1881 1882 arr[15] = sdebug_lowest_aligned & 0xff; 1883 1884 if (have_dif_prot) { 1885 arr[12] = (sdebug_dif - 1) << 1; /* P_TYPE */ 1886 arr[12] |= 1; /* PROT_EN */ 1887 } 1888 1889 return fill_from_dev_buffer(scp, arr, 1890 min_t(u32, alloc_len, SDEBUG_READCAP16_ARR_SZ)); 1891 } 1892 1893 #define SDEBUG_MAX_TGTPGS_ARR_SZ 1412 1894 1895 static int resp_report_tgtpgs(struct scsi_cmnd *scp, 1896 struct sdebug_dev_info *devip) 1897 { 1898 unsigned char *cmd = scp->cmnd; 1899 unsigned char *arr; 1900 int host_no = devip->sdbg_host->shost->host_no; 1901 int port_group_a, port_group_b, port_a, port_b; 1902 u32 alen, n, rlen; 1903 int ret; 1904 1905 alen = get_unaligned_be32(cmd + 6); 1906 arr = kzalloc(SDEBUG_MAX_TGTPGS_ARR_SZ, GFP_ATOMIC); 1907 if (! arr) 1908 return DID_REQUEUE << 16; 1909 /* 1910 * EVPD page 0x88 states we have two ports, one 1911 * real and a fake port with no device connected. 1912 * So we create two port groups with one port each 1913 * and set the group with port B to unavailable. 1914 */ 1915 port_a = 0x1; /* relative port A */ 1916 port_b = 0x2; /* relative port B */ 1917 port_group_a = (((host_no + 1) & 0x7f) << 8) + 1918 (devip->channel & 0x7f); 1919 port_group_b = (((host_no + 1) & 0x7f) << 8) + 1920 (devip->channel & 0x7f) + 0x80; 1921 1922 /* 1923 * The asymmetric access state is cycled according to the host_id. 1924 */ 1925 n = 4; 1926 if (sdebug_vpd_use_hostno == 0) { 1927 arr[n++] = host_no % 3; /* Asymm access state */ 1928 arr[n++] = 0x0F; /* claim: all states are supported */ 1929 } else { 1930 arr[n++] = 0x0; /* Active/Optimized path */ 1931 arr[n++] = 0x01; /* only support active/optimized paths */ 1932 } 1933 put_unaligned_be16(port_group_a, arr + n); 1934 n += 2; 1935 arr[n++] = 0; /* Reserved */ 1936 arr[n++] = 0; /* Status code */ 1937 arr[n++] = 0; /* Vendor unique */ 1938 arr[n++] = 0x1; /* One port per group */ 1939 arr[n++] = 0; /* Reserved */ 1940 arr[n++] = 0; /* Reserved */ 1941 put_unaligned_be16(port_a, arr + n); 1942 n += 2; 1943 arr[n++] = 3; /* Port unavailable */ 1944 arr[n++] = 0x08; /* claim: only unavailalbe paths are supported */ 1945 put_unaligned_be16(port_group_b, arr + n); 1946 n += 2; 1947 arr[n++] = 0; /* Reserved */ 1948 arr[n++] = 0; /* Status code */ 1949 arr[n++] = 0; /* Vendor unique */ 1950 arr[n++] = 0x1; /* One port per group */ 1951 arr[n++] = 0; /* Reserved */ 1952 arr[n++] = 0; /* Reserved */ 1953 put_unaligned_be16(port_b, arr + n); 1954 n += 2; 1955 1956 rlen = n - 4; 1957 put_unaligned_be32(rlen, arr + 0); 1958 1959 /* 1960 * Return the smallest value of either 1961 * - The allocated length 1962 * - The constructed command length 1963 * - The maximum array size 1964 */ 1965 rlen = min(alen, n); 1966 ret = fill_from_dev_buffer(scp, arr, 1967 min_t(u32, rlen, SDEBUG_MAX_TGTPGS_ARR_SZ)); 1968 kfree(arr); 1969 return ret; 1970 } 1971 1972 static int resp_rsup_opcodes(struct scsi_cmnd *scp, 1973 struct sdebug_dev_info *devip) 1974 { 1975 bool rctd; 1976 u8 reporting_opts, req_opcode, sdeb_i, supp; 1977 u16 req_sa, u; 1978 u32 alloc_len, a_len; 1979 int k, offset, len, errsts, count, bump, na; 1980 const struct opcode_info_t *oip; 1981 const struct opcode_info_t *r_oip; 1982 u8 *arr; 1983 u8 *cmd = scp->cmnd; 1984 1985 rctd = !!(cmd[2] & 0x80); 1986 reporting_opts = cmd[2] & 0x7; 1987 req_opcode = cmd[3]; 1988 req_sa = get_unaligned_be16(cmd + 4); 1989 alloc_len = get_unaligned_be32(cmd + 6); 1990 if (alloc_len < 4 || alloc_len > 0xffff) { 1991 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 6, -1); 1992 return check_condition_result; 1993 } 1994 if (alloc_len > 8192) 1995 a_len = 8192; 1996 else 1997 a_len = alloc_len; 1998 arr = kzalloc((a_len < 256) ? 320 : a_len + 64, GFP_ATOMIC); 1999 if (NULL == arr) { 2000 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC, 2001 INSUFF_RES_ASCQ); 2002 return check_condition_result; 2003 } 2004 switch (reporting_opts) { 2005 case 0: /* all commands */ 2006 /* count number of commands */ 2007 for (count = 0, oip = opcode_info_arr; 2008 oip->num_attached != 0xff; ++oip) { 2009 if (F_INV_OP & oip->flags) 2010 continue; 2011 count += (oip->num_attached + 1); 2012 } 2013 bump = rctd ? 20 : 8; 2014 put_unaligned_be32(count * bump, arr); 2015 for (offset = 4, oip = opcode_info_arr; 2016 oip->num_attached != 0xff && offset < a_len; ++oip) { 2017 if (F_INV_OP & oip->flags) 2018 continue; 2019 na = oip->num_attached; 2020 arr[offset] = oip->opcode; 2021 put_unaligned_be16(oip->sa, arr + offset + 2); 2022 if (rctd) 2023 arr[offset + 5] |= 0x2; 2024 if (FF_SA & oip->flags) 2025 arr[offset + 5] |= 0x1; 2026 put_unaligned_be16(oip->len_mask[0], arr + offset + 6); 2027 if (rctd) 2028 put_unaligned_be16(0xa, arr + offset + 8); 2029 r_oip = oip; 2030 for (k = 0, oip = oip->arrp; k < na; ++k, ++oip) { 2031 if (F_INV_OP & oip->flags) 2032 continue; 2033 offset += bump; 2034 arr[offset] = oip->opcode; 2035 put_unaligned_be16(oip->sa, arr + offset + 2); 2036 if (rctd) 2037 arr[offset + 5] |= 0x2; 2038 if (FF_SA & oip->flags) 2039 arr[offset + 5] |= 0x1; 2040 put_unaligned_be16(oip->len_mask[0], 2041 arr + offset + 6); 2042 if (rctd) 2043 put_unaligned_be16(0xa, 2044 arr + offset + 8); 2045 } 2046 oip = r_oip; 2047 offset += bump; 2048 } 2049 break; 2050 case 1: /* one command: opcode only */ 2051 case 2: /* one command: opcode plus service action */ 2052 case 3: /* one command: if sa==0 then opcode only else opcode+sa */ 2053 sdeb_i = opcode_ind_arr[req_opcode]; 2054 oip = &opcode_info_arr[sdeb_i]; 2055 if (F_INV_OP & oip->flags) { 2056 supp = 1; 2057 offset = 4; 2058 } else { 2059 if (1 == reporting_opts) { 2060 if (FF_SA & oip->flags) { 2061 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2062 2, 2); 2063 kfree(arr); 2064 return check_condition_result; 2065 } 2066 req_sa = 0; 2067 } else if (2 == reporting_opts && 2068 0 == (FF_SA & oip->flags)) { 2069 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 4, -1); 2070 kfree(arr); /* point at requested sa */ 2071 return check_condition_result; 2072 } 2073 if (0 == (FF_SA & oip->flags) && 2074 req_opcode == oip->opcode) 2075 supp = 3; 2076 else if (0 == (FF_SA & oip->flags)) { 2077 na = oip->num_attached; 2078 for (k = 0, oip = oip->arrp; k < na; 2079 ++k, ++oip) { 2080 if (req_opcode == oip->opcode) 2081 break; 2082 } 2083 supp = (k >= na) ? 1 : 3; 2084 } else if (req_sa != oip->sa) { 2085 na = oip->num_attached; 2086 for (k = 0, oip = oip->arrp; k < na; 2087 ++k, ++oip) { 2088 if (req_sa == oip->sa) 2089 break; 2090 } 2091 supp = (k >= na) ? 1 : 3; 2092 } else 2093 supp = 3; 2094 if (3 == supp) { 2095 u = oip->len_mask[0]; 2096 put_unaligned_be16(u, arr + 2); 2097 arr[4] = oip->opcode; 2098 for (k = 1; k < u; ++k) 2099 arr[4 + k] = (k < 16) ? 2100 oip->len_mask[k] : 0xff; 2101 offset = 4 + u; 2102 } else 2103 offset = 4; 2104 } 2105 arr[1] = (rctd ? 0x80 : 0) | supp; 2106 if (rctd) { 2107 put_unaligned_be16(0xa, arr + offset); 2108 offset += 12; 2109 } 2110 break; 2111 default: 2112 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 2); 2113 kfree(arr); 2114 return check_condition_result; 2115 } 2116 offset = (offset < a_len) ? offset : a_len; 2117 len = (offset < alloc_len) ? offset : alloc_len; 2118 errsts = fill_from_dev_buffer(scp, arr, len); 2119 kfree(arr); 2120 return errsts; 2121 } 2122 2123 static int resp_rsup_tmfs(struct scsi_cmnd *scp, 2124 struct sdebug_dev_info *devip) 2125 { 2126 bool repd; 2127 u32 alloc_len, len; 2128 u8 arr[16]; 2129 u8 *cmd = scp->cmnd; 2130 2131 memset(arr, 0, sizeof(arr)); 2132 repd = !!(cmd[2] & 0x80); 2133 alloc_len = get_unaligned_be32(cmd + 6); 2134 if (alloc_len < 4) { 2135 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 6, -1); 2136 return check_condition_result; 2137 } 2138 arr[0] = 0xc8; /* ATS | ATSS | LURS */ 2139 arr[1] = 0x1; /* ITNRS */ 2140 if (repd) { 2141 arr[3] = 0xc; 2142 len = 16; 2143 } else 2144 len = 4; 2145 2146 len = (len < alloc_len) ? len : alloc_len; 2147 return fill_from_dev_buffer(scp, arr, len); 2148 } 2149 2150 /* <<Following mode page info copied from ST318451LW>> */ 2151 2152 static int resp_err_recov_pg(unsigned char *p, int pcontrol, int target) 2153 { /* Read-Write Error Recovery page for mode_sense */ 2154 unsigned char err_recov_pg[] = {0x1, 0xa, 0xc0, 11, 240, 0, 0, 0, 2155 5, 0, 0xff, 0xff}; 2156 2157 memcpy(p, err_recov_pg, sizeof(err_recov_pg)); 2158 if (1 == pcontrol) 2159 memset(p + 2, 0, sizeof(err_recov_pg) - 2); 2160 return sizeof(err_recov_pg); 2161 } 2162 2163 static int resp_disconnect_pg(unsigned char *p, int pcontrol, int target) 2164 { /* Disconnect-Reconnect page for mode_sense */ 2165 unsigned char disconnect_pg[] = {0x2, 0xe, 128, 128, 0, 10, 0, 0, 2166 0, 0, 0, 0, 0, 0, 0, 0}; 2167 2168 memcpy(p, disconnect_pg, sizeof(disconnect_pg)); 2169 if (1 == pcontrol) 2170 memset(p + 2, 0, sizeof(disconnect_pg) - 2); 2171 return sizeof(disconnect_pg); 2172 } 2173 2174 static int resp_format_pg(unsigned char *p, int pcontrol, int target) 2175 { /* Format device page for mode_sense */ 2176 unsigned char format_pg[] = {0x3, 0x16, 0, 0, 0, 0, 0, 0, 2177 0, 0, 0, 0, 0, 0, 0, 0, 2178 0, 0, 0, 0, 0x40, 0, 0, 0}; 2179 2180 memcpy(p, format_pg, sizeof(format_pg)); 2181 put_unaligned_be16(sdebug_sectors_per, p + 10); 2182 put_unaligned_be16(sdebug_sector_size, p + 12); 2183 if (sdebug_removable) 2184 p[20] |= 0x20; /* should agree with INQUIRY */ 2185 if (1 == pcontrol) 2186 memset(p + 2, 0, sizeof(format_pg) - 2); 2187 return sizeof(format_pg); 2188 } 2189 2190 static unsigned char caching_pg[] = {0x8, 18, 0x14, 0, 0xff, 0xff, 0, 0, 2191 0xff, 0xff, 0xff, 0xff, 0x80, 0x14, 0, 0, 2192 0, 0, 0, 0}; 2193 2194 static int resp_caching_pg(unsigned char *p, int pcontrol, int target) 2195 { /* Caching page for mode_sense */ 2196 unsigned char ch_caching_pg[] = {/* 0x8, 18, */ 0x4, 0, 0, 0, 0, 0, 2197 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}; 2198 unsigned char d_caching_pg[] = {0x8, 18, 0x14, 0, 0xff, 0xff, 0, 0, 2199 0xff, 0xff, 0xff, 0xff, 0x80, 0x14, 0, 0, 0, 0, 0, 0}; 2200 2201 if (SDEBUG_OPT_N_WCE & sdebug_opts) 2202 caching_pg[2] &= ~0x4; /* set WCE=0 (default WCE=1) */ 2203 memcpy(p, caching_pg, sizeof(caching_pg)); 2204 if (1 == pcontrol) 2205 memcpy(p + 2, ch_caching_pg, sizeof(ch_caching_pg)); 2206 else if (2 == pcontrol) 2207 memcpy(p, d_caching_pg, sizeof(d_caching_pg)); 2208 return sizeof(caching_pg); 2209 } 2210 2211 static unsigned char ctrl_m_pg[] = {0xa, 10, 2, 0, 0, 0, 0, 0, 2212 0, 0, 0x2, 0x4b}; 2213 2214 static int resp_ctrl_m_pg(unsigned char *p, int pcontrol, int target) 2215 { /* Control mode page for mode_sense */ 2216 unsigned char ch_ctrl_m_pg[] = {/* 0xa, 10, */ 0x6, 0, 0, 0, 0, 0, 2217 0, 0, 0, 0}; 2218 unsigned char d_ctrl_m_pg[] = {0xa, 10, 2, 0, 0, 0, 0, 0, 2219 0, 0, 0x2, 0x4b}; 2220 2221 if (sdebug_dsense) 2222 ctrl_m_pg[2] |= 0x4; 2223 else 2224 ctrl_m_pg[2] &= ~0x4; 2225 2226 if (sdebug_ato) 2227 ctrl_m_pg[5] |= 0x80; /* ATO=1 */ 2228 2229 memcpy(p, ctrl_m_pg, sizeof(ctrl_m_pg)); 2230 if (1 == pcontrol) 2231 memcpy(p + 2, ch_ctrl_m_pg, sizeof(ch_ctrl_m_pg)); 2232 else if (2 == pcontrol) 2233 memcpy(p, d_ctrl_m_pg, sizeof(d_ctrl_m_pg)); 2234 return sizeof(ctrl_m_pg); 2235 } 2236 2237 2238 static int resp_iec_m_pg(unsigned char *p, int pcontrol, int target) 2239 { /* Informational Exceptions control mode page for mode_sense */ 2240 unsigned char ch_iec_m_pg[] = {/* 0x1c, 0xa, */ 0x4, 0xf, 0, 0, 0, 0, 2241 0, 0, 0x0, 0x0}; 2242 unsigned char d_iec_m_pg[] = {0x1c, 0xa, 0x08, 0, 0, 0, 0, 0, 2243 0, 0, 0x0, 0x0}; 2244 2245 memcpy(p, iec_m_pg, sizeof(iec_m_pg)); 2246 if (1 == pcontrol) 2247 memcpy(p + 2, ch_iec_m_pg, sizeof(ch_iec_m_pg)); 2248 else if (2 == pcontrol) 2249 memcpy(p, d_iec_m_pg, sizeof(d_iec_m_pg)); 2250 return sizeof(iec_m_pg); 2251 } 2252 2253 static int resp_sas_sf_m_pg(unsigned char *p, int pcontrol, int target) 2254 { /* SAS SSP mode page - short format for mode_sense */ 2255 unsigned char sas_sf_m_pg[] = {0x19, 0x6, 2256 0x6, 0x0, 0x7, 0xd0, 0x0, 0x0}; 2257 2258 memcpy(p, sas_sf_m_pg, sizeof(sas_sf_m_pg)); 2259 if (1 == pcontrol) 2260 memset(p + 2, 0, sizeof(sas_sf_m_pg) - 2); 2261 return sizeof(sas_sf_m_pg); 2262 } 2263 2264 2265 static int resp_sas_pcd_m_spg(unsigned char *p, int pcontrol, int target, 2266 int target_dev_id) 2267 { /* SAS phy control and discover mode page for mode_sense */ 2268 unsigned char sas_pcd_m_pg[] = {0x59, 0x1, 0, 0x64, 0, 0x6, 0, 2, 2269 0, 0, 0, 0, 0x10, 0x9, 0x8, 0x0, 2270 0, 0, 0, 0, 0, 0, 0, 0, /* insert SAS addr */ 2271 0, 0, 0, 0, 0, 0, 0, 0, /* insert SAS addr */ 2272 0x2, 0, 0, 0, 0, 0, 0, 0, 2273 0x88, 0x99, 0, 0, 0, 0, 0, 0, 2274 0, 0, 0, 0, 0, 0, 0, 0, 2275 0, 1, 0, 0, 0x10, 0x9, 0x8, 0x0, 2276 0, 0, 0, 0, 0, 0, 0, 0, /* insert SAS addr */ 2277 0, 0, 0, 0, 0, 0, 0, 0, /* insert SAS addr */ 2278 0x3, 0, 0, 0, 0, 0, 0, 0, 2279 0x88, 0x99, 0, 0, 0, 0, 0, 0, 2280 0, 0, 0, 0, 0, 0, 0, 0, 2281 }; 2282 int port_a, port_b; 2283 2284 put_unaligned_be64(naa3_comp_a, sas_pcd_m_pg + 16); 2285 put_unaligned_be64(naa3_comp_c + 1, sas_pcd_m_pg + 24); 2286 put_unaligned_be64(naa3_comp_a, sas_pcd_m_pg + 64); 2287 put_unaligned_be64(naa3_comp_c + 1, sas_pcd_m_pg + 72); 2288 port_a = target_dev_id + 1; 2289 port_b = port_a + 1; 2290 memcpy(p, sas_pcd_m_pg, sizeof(sas_pcd_m_pg)); 2291 put_unaligned_be32(port_a, p + 20); 2292 put_unaligned_be32(port_b, p + 48 + 20); 2293 if (1 == pcontrol) 2294 memset(p + 4, 0, sizeof(sas_pcd_m_pg) - 4); 2295 return sizeof(sas_pcd_m_pg); 2296 } 2297 2298 static int resp_sas_sha_m_spg(unsigned char *p, int pcontrol) 2299 { /* SAS SSP shared protocol specific port mode subpage */ 2300 unsigned char sas_sha_m_pg[] = {0x59, 0x2, 0, 0xc, 0, 0x6, 0x10, 0, 2301 0, 0, 0, 0, 0, 0, 0, 0, 2302 }; 2303 2304 memcpy(p, sas_sha_m_pg, sizeof(sas_sha_m_pg)); 2305 if (1 == pcontrol) 2306 memset(p + 4, 0, sizeof(sas_sha_m_pg) - 4); 2307 return sizeof(sas_sha_m_pg); 2308 } 2309 2310 #define SDEBUG_MAX_MSENSE_SZ 256 2311 2312 static int resp_mode_sense(struct scsi_cmnd *scp, 2313 struct sdebug_dev_info *devip) 2314 { 2315 int pcontrol, pcode, subpcode, bd_len; 2316 unsigned char dev_spec; 2317 u32 alloc_len, offset, len; 2318 int target_dev_id; 2319 int target = scp->device->id; 2320 unsigned char *ap; 2321 unsigned char arr[SDEBUG_MAX_MSENSE_SZ]; 2322 unsigned char *cmd = scp->cmnd; 2323 bool dbd, llbaa, msense_6, is_disk, is_zbc, bad_pcode; 2324 2325 dbd = !!(cmd[1] & 0x8); /* disable block descriptors */ 2326 pcontrol = (cmd[2] & 0xc0) >> 6; 2327 pcode = cmd[2] & 0x3f; 2328 subpcode = cmd[3]; 2329 msense_6 = (MODE_SENSE == cmd[0]); 2330 llbaa = msense_6 ? false : !!(cmd[1] & 0x10); 2331 is_disk = (sdebug_ptype == TYPE_DISK); 2332 is_zbc = (devip->zmodel != BLK_ZONED_NONE); 2333 if ((is_disk || is_zbc) && !dbd) 2334 bd_len = llbaa ? 16 : 8; 2335 else 2336 bd_len = 0; 2337 alloc_len = msense_6 ? cmd[4] : get_unaligned_be16(cmd + 7); 2338 memset(arr, 0, SDEBUG_MAX_MSENSE_SZ); 2339 if (0x3 == pcontrol) { /* Saving values not supported */ 2340 mk_sense_buffer(scp, ILLEGAL_REQUEST, SAVING_PARAMS_UNSUP, 0); 2341 return check_condition_result; 2342 } 2343 target_dev_id = ((devip->sdbg_host->shost->host_no + 1) * 2000) + 2344 (devip->target * 1000) - 3; 2345 /* for disks+zbc set DPOFUA bit and clear write protect (WP) bit */ 2346 if (is_disk || is_zbc) { 2347 dev_spec = 0x10; /* =0x90 if WP=1 implies read-only */ 2348 if (sdebug_wp) 2349 dev_spec |= 0x80; 2350 } else 2351 dev_spec = 0x0; 2352 if (msense_6) { 2353 arr[2] = dev_spec; 2354 arr[3] = bd_len; 2355 offset = 4; 2356 } else { 2357 arr[3] = dev_spec; 2358 if (16 == bd_len) 2359 arr[4] = 0x1; /* set LONGLBA bit */ 2360 arr[7] = bd_len; /* assume 255 or less */ 2361 offset = 8; 2362 } 2363 ap = arr + offset; 2364 if ((bd_len > 0) && (!sdebug_capacity)) 2365 sdebug_capacity = get_sdebug_capacity(); 2366 2367 if (8 == bd_len) { 2368 if (sdebug_capacity > 0xfffffffe) 2369 put_unaligned_be32(0xffffffff, ap + 0); 2370 else 2371 put_unaligned_be32(sdebug_capacity, ap + 0); 2372 put_unaligned_be16(sdebug_sector_size, ap + 6); 2373 offset += bd_len; 2374 ap = arr + offset; 2375 } else if (16 == bd_len) { 2376 put_unaligned_be64((u64)sdebug_capacity, ap + 0); 2377 put_unaligned_be32(sdebug_sector_size, ap + 12); 2378 offset += bd_len; 2379 ap = arr + offset; 2380 } 2381 2382 if ((subpcode > 0x0) && (subpcode < 0xff) && (0x19 != pcode)) { 2383 /* TODO: Control Extension page */ 2384 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1); 2385 return check_condition_result; 2386 } 2387 bad_pcode = false; 2388 2389 switch (pcode) { 2390 case 0x1: /* Read-Write error recovery page, direct access */ 2391 len = resp_err_recov_pg(ap, pcontrol, target); 2392 offset += len; 2393 break; 2394 case 0x2: /* Disconnect-Reconnect page, all devices */ 2395 len = resp_disconnect_pg(ap, pcontrol, target); 2396 offset += len; 2397 break; 2398 case 0x3: /* Format device page, direct access */ 2399 if (is_disk) { 2400 len = resp_format_pg(ap, pcontrol, target); 2401 offset += len; 2402 } else 2403 bad_pcode = true; 2404 break; 2405 case 0x8: /* Caching page, direct access */ 2406 if (is_disk || is_zbc) { 2407 len = resp_caching_pg(ap, pcontrol, target); 2408 offset += len; 2409 } else 2410 bad_pcode = true; 2411 break; 2412 case 0xa: /* Control Mode page, all devices */ 2413 len = resp_ctrl_m_pg(ap, pcontrol, target); 2414 offset += len; 2415 break; 2416 case 0x19: /* if spc==1 then sas phy, control+discover */ 2417 if ((subpcode > 0x2) && (subpcode < 0xff)) { 2418 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1); 2419 return check_condition_result; 2420 } 2421 len = 0; 2422 if ((0x0 == subpcode) || (0xff == subpcode)) 2423 len += resp_sas_sf_m_pg(ap + len, pcontrol, target); 2424 if ((0x1 == subpcode) || (0xff == subpcode)) 2425 len += resp_sas_pcd_m_spg(ap + len, pcontrol, target, 2426 target_dev_id); 2427 if ((0x2 == subpcode) || (0xff == subpcode)) 2428 len += resp_sas_sha_m_spg(ap + len, pcontrol); 2429 offset += len; 2430 break; 2431 case 0x1c: /* Informational Exceptions Mode page, all devices */ 2432 len = resp_iec_m_pg(ap, pcontrol, target); 2433 offset += len; 2434 break; 2435 case 0x3f: /* Read all Mode pages */ 2436 if ((0 == subpcode) || (0xff == subpcode)) { 2437 len = resp_err_recov_pg(ap, pcontrol, target); 2438 len += resp_disconnect_pg(ap + len, pcontrol, target); 2439 if (is_disk) { 2440 len += resp_format_pg(ap + len, pcontrol, 2441 target); 2442 len += resp_caching_pg(ap + len, pcontrol, 2443 target); 2444 } else if (is_zbc) { 2445 len += resp_caching_pg(ap + len, pcontrol, 2446 target); 2447 } 2448 len += resp_ctrl_m_pg(ap + len, pcontrol, target); 2449 len += resp_sas_sf_m_pg(ap + len, pcontrol, target); 2450 if (0xff == subpcode) { 2451 len += resp_sas_pcd_m_spg(ap + len, pcontrol, 2452 target, target_dev_id); 2453 len += resp_sas_sha_m_spg(ap + len, pcontrol); 2454 } 2455 len += resp_iec_m_pg(ap + len, pcontrol, target); 2456 offset += len; 2457 } else { 2458 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1); 2459 return check_condition_result; 2460 } 2461 break; 2462 default: 2463 bad_pcode = true; 2464 break; 2465 } 2466 if (bad_pcode) { 2467 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 5); 2468 return check_condition_result; 2469 } 2470 if (msense_6) 2471 arr[0] = offset - 1; 2472 else 2473 put_unaligned_be16((offset - 2), arr + 0); 2474 return fill_from_dev_buffer(scp, arr, min_t(u32, alloc_len, offset)); 2475 } 2476 2477 #define SDEBUG_MAX_MSELECT_SZ 512 2478 2479 static int resp_mode_select(struct scsi_cmnd *scp, 2480 struct sdebug_dev_info *devip) 2481 { 2482 int pf, sp, ps, md_len, bd_len, off, spf, pg_len; 2483 int param_len, res, mpage; 2484 unsigned char arr[SDEBUG_MAX_MSELECT_SZ]; 2485 unsigned char *cmd = scp->cmnd; 2486 int mselect6 = (MODE_SELECT == cmd[0]); 2487 2488 memset(arr, 0, sizeof(arr)); 2489 pf = cmd[1] & 0x10; 2490 sp = cmd[1] & 0x1; 2491 param_len = mselect6 ? cmd[4] : get_unaligned_be16(cmd + 7); 2492 if ((0 == pf) || sp || (param_len > SDEBUG_MAX_MSELECT_SZ)) { 2493 mk_sense_invalid_fld(scp, SDEB_IN_CDB, mselect6 ? 4 : 7, -1); 2494 return check_condition_result; 2495 } 2496 res = fetch_to_dev_buffer(scp, arr, param_len); 2497 if (-1 == res) 2498 return DID_ERROR << 16; 2499 else if (sdebug_verbose && (res < param_len)) 2500 sdev_printk(KERN_INFO, scp->device, 2501 "%s: cdb indicated=%d, IO sent=%d bytes\n", 2502 __func__, param_len, res); 2503 md_len = mselect6 ? (arr[0] + 1) : (get_unaligned_be16(arr + 0) + 2); 2504 bd_len = mselect6 ? arr[3] : get_unaligned_be16(arr + 6); 2505 off = bd_len + (mselect6 ? 4 : 8); 2506 if (md_len > 2 || off >= res) { 2507 mk_sense_invalid_fld(scp, SDEB_IN_DATA, 0, -1); 2508 return check_condition_result; 2509 } 2510 mpage = arr[off] & 0x3f; 2511 ps = !!(arr[off] & 0x80); 2512 if (ps) { 2513 mk_sense_invalid_fld(scp, SDEB_IN_DATA, off, 7); 2514 return check_condition_result; 2515 } 2516 spf = !!(arr[off] & 0x40); 2517 pg_len = spf ? (get_unaligned_be16(arr + off + 2) + 4) : 2518 (arr[off + 1] + 2); 2519 if ((pg_len + off) > param_len) { 2520 mk_sense_buffer(scp, ILLEGAL_REQUEST, 2521 PARAMETER_LIST_LENGTH_ERR, 0); 2522 return check_condition_result; 2523 } 2524 switch (mpage) { 2525 case 0x8: /* Caching Mode page */ 2526 if (caching_pg[1] == arr[off + 1]) { 2527 memcpy(caching_pg + 2, arr + off + 2, 2528 sizeof(caching_pg) - 2); 2529 goto set_mode_changed_ua; 2530 } 2531 break; 2532 case 0xa: /* Control Mode page */ 2533 if (ctrl_m_pg[1] == arr[off + 1]) { 2534 memcpy(ctrl_m_pg + 2, arr + off + 2, 2535 sizeof(ctrl_m_pg) - 2); 2536 if (ctrl_m_pg[4] & 0x8) 2537 sdebug_wp = true; 2538 else 2539 sdebug_wp = false; 2540 sdebug_dsense = !!(ctrl_m_pg[2] & 0x4); 2541 goto set_mode_changed_ua; 2542 } 2543 break; 2544 case 0x1c: /* Informational Exceptions Mode page */ 2545 if (iec_m_pg[1] == arr[off + 1]) { 2546 memcpy(iec_m_pg + 2, arr + off + 2, 2547 sizeof(iec_m_pg) - 2); 2548 goto set_mode_changed_ua; 2549 } 2550 break; 2551 default: 2552 break; 2553 } 2554 mk_sense_invalid_fld(scp, SDEB_IN_DATA, off, 5); 2555 return check_condition_result; 2556 set_mode_changed_ua: 2557 set_bit(SDEBUG_UA_MODE_CHANGED, devip->uas_bm); 2558 return 0; 2559 } 2560 2561 static int resp_temp_l_pg(unsigned char *arr) 2562 { 2563 unsigned char temp_l_pg[] = {0x0, 0x0, 0x3, 0x2, 0x0, 38, 2564 0x0, 0x1, 0x3, 0x2, 0x0, 65, 2565 }; 2566 2567 memcpy(arr, temp_l_pg, sizeof(temp_l_pg)); 2568 return sizeof(temp_l_pg); 2569 } 2570 2571 static int resp_ie_l_pg(unsigned char *arr) 2572 { 2573 unsigned char ie_l_pg[] = {0x0, 0x0, 0x3, 0x3, 0x0, 0x0, 38, 2574 }; 2575 2576 memcpy(arr, ie_l_pg, sizeof(ie_l_pg)); 2577 if (iec_m_pg[2] & 0x4) { /* TEST bit set */ 2578 arr[4] = THRESHOLD_EXCEEDED; 2579 arr[5] = 0xff; 2580 } 2581 return sizeof(ie_l_pg); 2582 } 2583 2584 #define SDEBUG_MAX_LSENSE_SZ 512 2585 2586 static int resp_log_sense(struct scsi_cmnd *scp, 2587 struct sdebug_dev_info *devip) 2588 { 2589 int ppc, sp, pcode, subpcode; 2590 u32 alloc_len, len, n; 2591 unsigned char arr[SDEBUG_MAX_LSENSE_SZ]; 2592 unsigned char *cmd = scp->cmnd; 2593 2594 memset(arr, 0, sizeof(arr)); 2595 ppc = cmd[1] & 0x2; 2596 sp = cmd[1] & 0x1; 2597 if (ppc || sp) { 2598 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, ppc ? 1 : 0); 2599 return check_condition_result; 2600 } 2601 pcode = cmd[2] & 0x3f; 2602 subpcode = cmd[3] & 0xff; 2603 alloc_len = get_unaligned_be16(cmd + 7); 2604 arr[0] = pcode; 2605 if (0 == subpcode) { 2606 switch (pcode) { 2607 case 0x0: /* Supported log pages log page */ 2608 n = 4; 2609 arr[n++] = 0x0; /* this page */ 2610 arr[n++] = 0xd; /* Temperature */ 2611 arr[n++] = 0x2f; /* Informational exceptions */ 2612 arr[3] = n - 4; 2613 break; 2614 case 0xd: /* Temperature log page */ 2615 arr[3] = resp_temp_l_pg(arr + 4); 2616 break; 2617 case 0x2f: /* Informational exceptions log page */ 2618 arr[3] = resp_ie_l_pg(arr + 4); 2619 break; 2620 default: 2621 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 5); 2622 return check_condition_result; 2623 } 2624 } else if (0xff == subpcode) { 2625 arr[0] |= 0x40; 2626 arr[1] = subpcode; 2627 switch (pcode) { 2628 case 0x0: /* Supported log pages and subpages log page */ 2629 n = 4; 2630 arr[n++] = 0x0; 2631 arr[n++] = 0x0; /* 0,0 page */ 2632 arr[n++] = 0x0; 2633 arr[n++] = 0xff; /* this page */ 2634 arr[n++] = 0xd; 2635 arr[n++] = 0x0; /* Temperature */ 2636 arr[n++] = 0x2f; 2637 arr[n++] = 0x0; /* Informational exceptions */ 2638 arr[3] = n - 4; 2639 break; 2640 case 0xd: /* Temperature subpages */ 2641 n = 4; 2642 arr[n++] = 0xd; 2643 arr[n++] = 0x0; /* Temperature */ 2644 arr[3] = n - 4; 2645 break; 2646 case 0x2f: /* Informational exceptions subpages */ 2647 n = 4; 2648 arr[n++] = 0x2f; 2649 arr[n++] = 0x0; /* Informational exceptions */ 2650 arr[3] = n - 4; 2651 break; 2652 default: 2653 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 5); 2654 return check_condition_result; 2655 } 2656 } else { 2657 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1); 2658 return check_condition_result; 2659 } 2660 len = min_t(u32, get_unaligned_be16(arr + 2) + 4, alloc_len); 2661 return fill_from_dev_buffer(scp, arr, 2662 min_t(u32, len, SDEBUG_MAX_INQ_ARR_SZ)); 2663 } 2664 2665 static inline bool sdebug_dev_is_zoned(struct sdebug_dev_info *devip) 2666 { 2667 return devip->nr_zones != 0; 2668 } 2669 2670 static struct sdeb_zone_state *zbc_zone(struct sdebug_dev_info *devip, 2671 unsigned long long lba) 2672 { 2673 return &devip->zstate[lba >> devip->zsize_shift]; 2674 } 2675 2676 static inline bool zbc_zone_is_conv(struct sdeb_zone_state *zsp) 2677 { 2678 return zsp->z_type == ZBC_ZONE_TYPE_CNV; 2679 } 2680 2681 static void zbc_close_zone(struct sdebug_dev_info *devip, 2682 struct sdeb_zone_state *zsp) 2683 { 2684 enum sdebug_z_cond zc; 2685 2686 if (zbc_zone_is_conv(zsp)) 2687 return; 2688 2689 zc = zsp->z_cond; 2690 if (!(zc == ZC2_IMPLICIT_OPEN || zc == ZC3_EXPLICIT_OPEN)) 2691 return; 2692 2693 if (zc == ZC2_IMPLICIT_OPEN) 2694 devip->nr_imp_open--; 2695 else 2696 devip->nr_exp_open--; 2697 2698 if (zsp->z_wp == zsp->z_start) { 2699 zsp->z_cond = ZC1_EMPTY; 2700 } else { 2701 zsp->z_cond = ZC4_CLOSED; 2702 devip->nr_closed++; 2703 } 2704 } 2705 2706 static void zbc_close_imp_open_zone(struct sdebug_dev_info *devip) 2707 { 2708 struct sdeb_zone_state *zsp = &devip->zstate[0]; 2709 unsigned int i; 2710 2711 for (i = 0; i < devip->nr_zones; i++, zsp++) { 2712 if (zsp->z_cond == ZC2_IMPLICIT_OPEN) { 2713 zbc_close_zone(devip, zsp); 2714 return; 2715 } 2716 } 2717 } 2718 2719 static void zbc_open_zone(struct sdebug_dev_info *devip, 2720 struct sdeb_zone_state *zsp, bool explicit) 2721 { 2722 enum sdebug_z_cond zc; 2723 2724 if (zbc_zone_is_conv(zsp)) 2725 return; 2726 2727 zc = zsp->z_cond; 2728 if ((explicit && zc == ZC3_EXPLICIT_OPEN) || 2729 (!explicit && zc == ZC2_IMPLICIT_OPEN)) 2730 return; 2731 2732 /* Close an implicit open zone if necessary */ 2733 if (explicit && zsp->z_cond == ZC2_IMPLICIT_OPEN) 2734 zbc_close_zone(devip, zsp); 2735 else if (devip->max_open && 2736 devip->nr_imp_open + devip->nr_exp_open >= devip->max_open) 2737 zbc_close_imp_open_zone(devip); 2738 2739 if (zsp->z_cond == ZC4_CLOSED) 2740 devip->nr_closed--; 2741 if (explicit) { 2742 zsp->z_cond = ZC3_EXPLICIT_OPEN; 2743 devip->nr_exp_open++; 2744 } else { 2745 zsp->z_cond = ZC2_IMPLICIT_OPEN; 2746 devip->nr_imp_open++; 2747 } 2748 } 2749 2750 static void zbc_inc_wp(struct sdebug_dev_info *devip, 2751 unsigned long long lba, unsigned int num) 2752 { 2753 struct sdeb_zone_state *zsp = zbc_zone(devip, lba); 2754 unsigned long long n, end, zend = zsp->z_start + zsp->z_size; 2755 2756 if (zbc_zone_is_conv(zsp)) 2757 return; 2758 2759 if (zsp->z_type == ZBC_ZONE_TYPE_SWR) { 2760 zsp->z_wp += num; 2761 if (zsp->z_wp >= zend) 2762 zsp->z_cond = ZC5_FULL; 2763 return; 2764 } 2765 2766 while (num) { 2767 if (lba != zsp->z_wp) 2768 zsp->z_non_seq_resource = true; 2769 2770 end = lba + num; 2771 if (end >= zend) { 2772 n = zend - lba; 2773 zsp->z_wp = zend; 2774 } else if (end > zsp->z_wp) { 2775 n = num; 2776 zsp->z_wp = end; 2777 } else { 2778 n = num; 2779 } 2780 if (zsp->z_wp >= zend) 2781 zsp->z_cond = ZC5_FULL; 2782 2783 num -= n; 2784 lba += n; 2785 if (num) { 2786 zsp++; 2787 zend = zsp->z_start + zsp->z_size; 2788 } 2789 } 2790 } 2791 2792 static int check_zbc_access_params(struct scsi_cmnd *scp, 2793 unsigned long long lba, unsigned int num, bool write) 2794 { 2795 struct scsi_device *sdp = scp->device; 2796 struct sdebug_dev_info *devip = (struct sdebug_dev_info *)sdp->hostdata; 2797 struct sdeb_zone_state *zsp = zbc_zone(devip, lba); 2798 struct sdeb_zone_state *zsp_end = zbc_zone(devip, lba + num - 1); 2799 2800 if (!write) { 2801 if (devip->zmodel == BLK_ZONED_HA) 2802 return 0; 2803 /* For host-managed, reads cannot cross zone types boundaries */ 2804 if (zsp_end != zsp && 2805 zbc_zone_is_conv(zsp) && 2806 !zbc_zone_is_conv(zsp_end)) { 2807 mk_sense_buffer(scp, ILLEGAL_REQUEST, 2808 LBA_OUT_OF_RANGE, 2809 READ_INVDATA_ASCQ); 2810 return check_condition_result; 2811 } 2812 return 0; 2813 } 2814 2815 /* No restrictions for writes within conventional zones */ 2816 if (zbc_zone_is_conv(zsp)) { 2817 if (!zbc_zone_is_conv(zsp_end)) { 2818 mk_sense_buffer(scp, ILLEGAL_REQUEST, 2819 LBA_OUT_OF_RANGE, 2820 WRITE_BOUNDARY_ASCQ); 2821 return check_condition_result; 2822 } 2823 return 0; 2824 } 2825 2826 if (zsp->z_type == ZBC_ZONE_TYPE_SWR) { 2827 /* Writes cannot cross sequential zone boundaries */ 2828 if (zsp_end != zsp) { 2829 mk_sense_buffer(scp, ILLEGAL_REQUEST, 2830 LBA_OUT_OF_RANGE, 2831 WRITE_BOUNDARY_ASCQ); 2832 return check_condition_result; 2833 } 2834 /* Cannot write full zones */ 2835 if (zsp->z_cond == ZC5_FULL) { 2836 mk_sense_buffer(scp, ILLEGAL_REQUEST, 2837 INVALID_FIELD_IN_CDB, 0); 2838 return check_condition_result; 2839 } 2840 /* Writes must be aligned to the zone WP */ 2841 if (lba != zsp->z_wp) { 2842 mk_sense_buffer(scp, ILLEGAL_REQUEST, 2843 LBA_OUT_OF_RANGE, 2844 UNALIGNED_WRITE_ASCQ); 2845 return check_condition_result; 2846 } 2847 } 2848 2849 /* Handle implicit open of closed and empty zones */ 2850 if (zsp->z_cond == ZC1_EMPTY || zsp->z_cond == ZC4_CLOSED) { 2851 if (devip->max_open && 2852 devip->nr_exp_open >= devip->max_open) { 2853 mk_sense_buffer(scp, DATA_PROTECT, 2854 INSUFF_RES_ASC, 2855 INSUFF_ZONE_ASCQ); 2856 return check_condition_result; 2857 } 2858 zbc_open_zone(devip, zsp, false); 2859 } 2860 2861 return 0; 2862 } 2863 2864 static inline int check_device_access_params 2865 (struct scsi_cmnd *scp, unsigned long long lba, 2866 unsigned int num, bool write) 2867 { 2868 struct scsi_device *sdp = scp->device; 2869 struct sdebug_dev_info *devip = (struct sdebug_dev_info *)sdp->hostdata; 2870 2871 if (lba + num > sdebug_capacity) { 2872 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0); 2873 return check_condition_result; 2874 } 2875 /* transfer length excessive (tie in to block limits VPD page) */ 2876 if (num > sdebug_store_sectors) { 2877 /* needs work to find which cdb byte 'num' comes from */ 2878 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0); 2879 return check_condition_result; 2880 } 2881 if (write && unlikely(sdebug_wp)) { 2882 mk_sense_buffer(scp, DATA_PROTECT, WRITE_PROTECTED, 0x2); 2883 return check_condition_result; 2884 } 2885 if (sdebug_dev_is_zoned(devip)) 2886 return check_zbc_access_params(scp, lba, num, write); 2887 2888 return 0; 2889 } 2890 2891 /* 2892 * Note: if BUG_ON() fires it usually indicates a problem with the parser 2893 * tables. Perhaps a missing F_FAKE_RW or FF_MEDIA_IO flag. Response functions 2894 * that access any of the "stores" in struct sdeb_store_info should call this 2895 * function with bug_if_fake_rw set to true. 2896 */ 2897 static inline struct sdeb_store_info *devip2sip(struct sdebug_dev_info *devip, 2898 bool bug_if_fake_rw) 2899 { 2900 if (sdebug_fake_rw) { 2901 BUG_ON(bug_if_fake_rw); /* See note above */ 2902 return NULL; 2903 } 2904 return xa_load(per_store_ap, devip->sdbg_host->si_idx); 2905 } 2906 2907 /* Returns number of bytes copied or -1 if error. */ 2908 static int do_device_access(struct sdeb_store_info *sip, struct scsi_cmnd *scp, 2909 u32 sg_skip, u64 lba, u32 num, bool do_write) 2910 { 2911 int ret; 2912 u64 block, rest = 0; 2913 enum dma_data_direction dir; 2914 struct scsi_data_buffer *sdb = &scp->sdb; 2915 u8 *fsp; 2916 2917 if (do_write) { 2918 dir = DMA_TO_DEVICE; 2919 write_since_sync = true; 2920 } else { 2921 dir = DMA_FROM_DEVICE; 2922 } 2923 2924 if (!sdb->length || !sip) 2925 return 0; 2926 if (scp->sc_data_direction != dir) 2927 return -1; 2928 fsp = sip->storep; 2929 2930 block = do_div(lba, sdebug_store_sectors); 2931 if (block + num > sdebug_store_sectors) 2932 rest = block + num - sdebug_store_sectors; 2933 2934 ret = sg_copy_buffer(sdb->table.sgl, sdb->table.nents, 2935 fsp + (block * sdebug_sector_size), 2936 (num - rest) * sdebug_sector_size, sg_skip, do_write); 2937 if (ret != (num - rest) * sdebug_sector_size) 2938 return ret; 2939 2940 if (rest) { 2941 ret += sg_copy_buffer(sdb->table.sgl, sdb->table.nents, 2942 fsp, rest * sdebug_sector_size, 2943 sg_skip + ((num - rest) * sdebug_sector_size), 2944 do_write); 2945 } 2946 2947 return ret; 2948 } 2949 2950 /* Returns number of bytes copied or -1 if error. */ 2951 static int do_dout_fetch(struct scsi_cmnd *scp, u32 num, u8 *doutp) 2952 { 2953 struct scsi_data_buffer *sdb = &scp->sdb; 2954 2955 if (!sdb->length) 2956 return 0; 2957 if (scp->sc_data_direction != DMA_TO_DEVICE) 2958 return -1; 2959 return sg_copy_buffer(sdb->table.sgl, sdb->table.nents, doutp, 2960 num * sdebug_sector_size, 0, true); 2961 } 2962 2963 /* If sip->storep+lba compares equal to arr(num), then copy top half of 2964 * arr into sip->storep+lba and return true. If comparison fails then 2965 * return false. */ 2966 static bool comp_write_worker(struct sdeb_store_info *sip, u64 lba, u32 num, 2967 const u8 *arr, bool compare_only) 2968 { 2969 bool res; 2970 u64 block, rest = 0; 2971 u32 store_blks = sdebug_store_sectors; 2972 u32 lb_size = sdebug_sector_size; 2973 u8 *fsp = sip->storep; 2974 2975 block = do_div(lba, store_blks); 2976 if (block + num > store_blks) 2977 rest = block + num - store_blks; 2978 2979 res = !memcmp(fsp + (block * lb_size), arr, (num - rest) * lb_size); 2980 if (!res) 2981 return res; 2982 if (rest) 2983 res = memcmp(fsp, arr + ((num - rest) * lb_size), 2984 rest * lb_size); 2985 if (!res) 2986 return res; 2987 if (compare_only) 2988 return true; 2989 arr += num * lb_size; 2990 memcpy(fsp + (block * lb_size), arr, (num - rest) * lb_size); 2991 if (rest) 2992 memcpy(fsp, arr + ((num - rest) * lb_size), rest * lb_size); 2993 return res; 2994 } 2995 2996 static __be16 dif_compute_csum(const void *buf, int len) 2997 { 2998 __be16 csum; 2999 3000 if (sdebug_guard) 3001 csum = (__force __be16)ip_compute_csum(buf, len); 3002 else 3003 csum = cpu_to_be16(crc_t10dif(buf, len)); 3004 3005 return csum; 3006 } 3007 3008 static int dif_verify(struct t10_pi_tuple *sdt, const void *data, 3009 sector_t sector, u32 ei_lba) 3010 { 3011 __be16 csum = dif_compute_csum(data, sdebug_sector_size); 3012 3013 if (sdt->guard_tag != csum) { 3014 pr_err("GUARD check failed on sector %lu rcvd 0x%04x, data 0x%04x\n", 3015 (unsigned long)sector, 3016 be16_to_cpu(sdt->guard_tag), 3017 be16_to_cpu(csum)); 3018 return 0x01; 3019 } 3020 if (sdebug_dif == T10_PI_TYPE1_PROTECTION && 3021 be32_to_cpu(sdt->ref_tag) != (sector & 0xffffffff)) { 3022 pr_err("REF check failed on sector %lu\n", 3023 (unsigned long)sector); 3024 return 0x03; 3025 } 3026 if (sdebug_dif == T10_PI_TYPE2_PROTECTION && 3027 be32_to_cpu(sdt->ref_tag) != ei_lba) { 3028 pr_err("REF check failed on sector %lu\n", 3029 (unsigned long)sector); 3030 return 0x03; 3031 } 3032 return 0; 3033 } 3034 3035 static void dif_copy_prot(struct scsi_cmnd *scp, sector_t sector, 3036 unsigned int sectors, bool read) 3037 { 3038 size_t resid; 3039 void *paddr; 3040 struct sdeb_store_info *sip = devip2sip((struct sdebug_dev_info *) 3041 scp->device->hostdata, true); 3042 struct t10_pi_tuple *dif_storep = sip->dif_storep; 3043 const void *dif_store_end = dif_storep + sdebug_store_sectors; 3044 struct sg_mapping_iter miter; 3045 3046 /* Bytes of protection data to copy into sgl */ 3047 resid = sectors * sizeof(*dif_storep); 3048 3049 sg_miter_start(&miter, scsi_prot_sglist(scp), 3050 scsi_prot_sg_count(scp), SG_MITER_ATOMIC | 3051 (read ? SG_MITER_TO_SG : SG_MITER_FROM_SG)); 3052 3053 while (sg_miter_next(&miter) && resid > 0) { 3054 size_t len = min_t(size_t, miter.length, resid); 3055 void *start = dif_store(sip, sector); 3056 size_t rest = 0; 3057 3058 if (dif_store_end < start + len) 3059 rest = start + len - dif_store_end; 3060 3061 paddr = miter.addr; 3062 3063 if (read) 3064 memcpy(paddr, start, len - rest); 3065 else 3066 memcpy(start, paddr, len - rest); 3067 3068 if (rest) { 3069 if (read) 3070 memcpy(paddr + len - rest, dif_storep, rest); 3071 else 3072 memcpy(dif_storep, paddr + len - rest, rest); 3073 } 3074 3075 sector += len / sizeof(*dif_storep); 3076 resid -= len; 3077 } 3078 sg_miter_stop(&miter); 3079 } 3080 3081 static int prot_verify_read(struct scsi_cmnd *scp, sector_t start_sec, 3082 unsigned int sectors, u32 ei_lba) 3083 { 3084 int ret = 0; 3085 unsigned int i; 3086 sector_t sector; 3087 struct sdeb_store_info *sip = devip2sip((struct sdebug_dev_info *) 3088 scp->device->hostdata, true); 3089 struct t10_pi_tuple *sdt; 3090 3091 for (i = 0; i < sectors; i++, ei_lba++) { 3092 sector = start_sec + i; 3093 sdt = dif_store(sip, sector); 3094 3095 if (sdt->app_tag == cpu_to_be16(0xffff)) 3096 continue; 3097 3098 /* 3099 * Because scsi_debug acts as both initiator and 3100 * target we proceed to verify the PI even if 3101 * RDPROTECT=3. This is done so the "initiator" knows 3102 * which type of error to return. Otherwise we would 3103 * have to iterate over the PI twice. 3104 */ 3105 if (scp->cmnd[1] >> 5) { /* RDPROTECT */ 3106 ret = dif_verify(sdt, lba2fake_store(sip, sector), 3107 sector, ei_lba); 3108 if (ret) { 3109 dif_errors++; 3110 break; 3111 } 3112 } 3113 } 3114 3115 dif_copy_prot(scp, start_sec, sectors, true); 3116 dix_reads++; 3117 3118 return ret; 3119 } 3120 3121 static int resp_read_dt0(struct scsi_cmnd *scp, struct sdebug_dev_info *devip) 3122 { 3123 bool check_prot; 3124 u32 num; 3125 u32 ei_lba; 3126 int ret; 3127 u64 lba; 3128 struct sdeb_store_info *sip = devip2sip(devip, true); 3129 rwlock_t *macc_lckp = sip ? &sip->macc_lck : &sdeb_fake_rw_lck; 3130 u8 *cmd = scp->cmnd; 3131 3132 switch (cmd[0]) { 3133 case READ_16: 3134 ei_lba = 0; 3135 lba = get_unaligned_be64(cmd + 2); 3136 num = get_unaligned_be32(cmd + 10); 3137 check_prot = true; 3138 break; 3139 case READ_10: 3140 ei_lba = 0; 3141 lba = get_unaligned_be32(cmd + 2); 3142 num = get_unaligned_be16(cmd + 7); 3143 check_prot = true; 3144 break; 3145 case READ_6: 3146 ei_lba = 0; 3147 lba = (u32)cmd[3] | (u32)cmd[2] << 8 | 3148 (u32)(cmd[1] & 0x1f) << 16; 3149 num = (0 == cmd[4]) ? 256 : cmd[4]; 3150 check_prot = true; 3151 break; 3152 case READ_12: 3153 ei_lba = 0; 3154 lba = get_unaligned_be32(cmd + 2); 3155 num = get_unaligned_be32(cmd + 6); 3156 check_prot = true; 3157 break; 3158 case XDWRITEREAD_10: 3159 ei_lba = 0; 3160 lba = get_unaligned_be32(cmd + 2); 3161 num = get_unaligned_be16(cmd + 7); 3162 check_prot = false; 3163 break; 3164 default: /* assume READ(32) */ 3165 lba = get_unaligned_be64(cmd + 12); 3166 ei_lba = get_unaligned_be32(cmd + 20); 3167 num = get_unaligned_be32(cmd + 28); 3168 check_prot = false; 3169 break; 3170 } 3171 if (unlikely(have_dif_prot && check_prot)) { 3172 if (sdebug_dif == T10_PI_TYPE2_PROTECTION && 3173 (cmd[1] & 0xe0)) { 3174 mk_sense_invalid_opcode(scp); 3175 return check_condition_result; 3176 } 3177 if ((sdebug_dif == T10_PI_TYPE1_PROTECTION || 3178 sdebug_dif == T10_PI_TYPE3_PROTECTION) && 3179 (cmd[1] & 0xe0) == 0) 3180 sdev_printk(KERN_ERR, scp->device, "Unprotected RD " 3181 "to DIF device\n"); 3182 } 3183 if (unlikely((sdebug_opts & SDEBUG_OPT_SHORT_TRANSFER) && 3184 atomic_read(&sdeb_inject_pending))) { 3185 num /= 2; 3186 atomic_set(&sdeb_inject_pending, 0); 3187 } 3188 3189 ret = check_device_access_params(scp, lba, num, false); 3190 if (ret) 3191 return ret; 3192 if (unlikely((SDEBUG_OPT_MEDIUM_ERR & sdebug_opts) && 3193 (lba <= (sdebug_medium_error_start + sdebug_medium_error_count - 1)) && 3194 ((lba + num) > sdebug_medium_error_start))) { 3195 /* claim unrecoverable read error */ 3196 mk_sense_buffer(scp, MEDIUM_ERROR, UNRECOVERED_READ_ERR, 0); 3197 /* set info field and valid bit for fixed descriptor */ 3198 if (0x70 == (scp->sense_buffer[0] & 0x7f)) { 3199 scp->sense_buffer[0] |= 0x80; /* Valid bit */ 3200 ret = (lba < OPT_MEDIUM_ERR_ADDR) 3201 ? OPT_MEDIUM_ERR_ADDR : (int)lba; 3202 put_unaligned_be32(ret, scp->sense_buffer + 3); 3203 } 3204 scsi_set_resid(scp, scsi_bufflen(scp)); 3205 return check_condition_result; 3206 } 3207 3208 read_lock(macc_lckp); 3209 3210 /* DIX + T10 DIF */ 3211 if (unlikely(sdebug_dix && scsi_prot_sg_count(scp))) { 3212 switch (prot_verify_read(scp, lba, num, ei_lba)) { 3213 case 1: /* Guard tag error */ 3214 if (cmd[1] >> 5 != 3) { /* RDPROTECT != 3 */ 3215 read_unlock(macc_lckp); 3216 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 1); 3217 return check_condition_result; 3218 } else if (scp->prot_flags & SCSI_PROT_GUARD_CHECK) { 3219 read_unlock(macc_lckp); 3220 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 1); 3221 return illegal_condition_result; 3222 } 3223 break; 3224 case 3: /* Reference tag error */ 3225 if (cmd[1] >> 5 != 3) { /* RDPROTECT != 3 */ 3226 read_unlock(macc_lckp); 3227 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 3); 3228 return check_condition_result; 3229 } else if (scp->prot_flags & SCSI_PROT_REF_CHECK) { 3230 read_unlock(macc_lckp); 3231 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 3); 3232 return illegal_condition_result; 3233 } 3234 break; 3235 } 3236 } 3237 3238 ret = do_device_access(sip, scp, 0, lba, num, false); 3239 read_unlock(macc_lckp); 3240 if (unlikely(ret == -1)) 3241 return DID_ERROR << 16; 3242 3243 scsi_set_resid(scp, scsi_bufflen(scp) - ret); 3244 3245 if (unlikely((sdebug_opts & SDEBUG_OPT_RECOV_DIF_DIX) && 3246 atomic_read(&sdeb_inject_pending))) { 3247 if (sdebug_opts & SDEBUG_OPT_RECOVERED_ERR) { 3248 mk_sense_buffer(scp, RECOVERED_ERROR, THRESHOLD_EXCEEDED, 0); 3249 atomic_set(&sdeb_inject_pending, 0); 3250 return check_condition_result; 3251 } else if (sdebug_opts & SDEBUG_OPT_DIF_ERR) { 3252 /* Logical block guard check failed */ 3253 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 1); 3254 atomic_set(&sdeb_inject_pending, 0); 3255 return illegal_condition_result; 3256 } else if (SDEBUG_OPT_DIX_ERR & sdebug_opts) { 3257 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 1); 3258 atomic_set(&sdeb_inject_pending, 0); 3259 return illegal_condition_result; 3260 } 3261 } 3262 return 0; 3263 } 3264 3265 static int prot_verify_write(struct scsi_cmnd *SCpnt, sector_t start_sec, 3266 unsigned int sectors, u32 ei_lba) 3267 { 3268 int ret; 3269 struct t10_pi_tuple *sdt; 3270 void *daddr; 3271 sector_t sector = start_sec; 3272 int ppage_offset; 3273 int dpage_offset; 3274 struct sg_mapping_iter diter; 3275 struct sg_mapping_iter piter; 3276 3277 BUG_ON(scsi_sg_count(SCpnt) == 0); 3278 BUG_ON(scsi_prot_sg_count(SCpnt) == 0); 3279 3280 sg_miter_start(&piter, scsi_prot_sglist(SCpnt), 3281 scsi_prot_sg_count(SCpnt), 3282 SG_MITER_ATOMIC | SG_MITER_FROM_SG); 3283 sg_miter_start(&diter, scsi_sglist(SCpnt), scsi_sg_count(SCpnt), 3284 SG_MITER_ATOMIC | SG_MITER_FROM_SG); 3285 3286 /* For each protection page */ 3287 while (sg_miter_next(&piter)) { 3288 dpage_offset = 0; 3289 if (WARN_ON(!sg_miter_next(&diter))) { 3290 ret = 0x01; 3291 goto out; 3292 } 3293 3294 for (ppage_offset = 0; ppage_offset < piter.length; 3295 ppage_offset += sizeof(struct t10_pi_tuple)) { 3296 /* If we're at the end of the current 3297 * data page advance to the next one 3298 */ 3299 if (dpage_offset >= diter.length) { 3300 if (WARN_ON(!sg_miter_next(&diter))) { 3301 ret = 0x01; 3302 goto out; 3303 } 3304 dpage_offset = 0; 3305 } 3306 3307 sdt = piter.addr + ppage_offset; 3308 daddr = diter.addr + dpage_offset; 3309 3310 if (SCpnt->cmnd[1] >> 5 != 3) { /* WRPROTECT */ 3311 ret = dif_verify(sdt, daddr, sector, ei_lba); 3312 if (ret) 3313 goto out; 3314 } 3315 3316 sector++; 3317 ei_lba++; 3318 dpage_offset += sdebug_sector_size; 3319 } 3320 diter.consumed = dpage_offset; 3321 sg_miter_stop(&diter); 3322 } 3323 sg_miter_stop(&piter); 3324 3325 dif_copy_prot(SCpnt, start_sec, sectors, false); 3326 dix_writes++; 3327 3328 return 0; 3329 3330 out: 3331 dif_errors++; 3332 sg_miter_stop(&diter); 3333 sg_miter_stop(&piter); 3334 return ret; 3335 } 3336 3337 static unsigned long lba_to_map_index(sector_t lba) 3338 { 3339 if (sdebug_unmap_alignment) 3340 lba += sdebug_unmap_granularity - sdebug_unmap_alignment; 3341 sector_div(lba, sdebug_unmap_granularity); 3342 return lba; 3343 } 3344 3345 static sector_t map_index_to_lba(unsigned long index) 3346 { 3347 sector_t lba = index * sdebug_unmap_granularity; 3348 3349 if (sdebug_unmap_alignment) 3350 lba -= sdebug_unmap_granularity - sdebug_unmap_alignment; 3351 return lba; 3352 } 3353 3354 static unsigned int map_state(struct sdeb_store_info *sip, sector_t lba, 3355 unsigned int *num) 3356 { 3357 sector_t end; 3358 unsigned int mapped; 3359 unsigned long index; 3360 unsigned long next; 3361 3362 index = lba_to_map_index(lba); 3363 mapped = test_bit(index, sip->map_storep); 3364 3365 if (mapped) 3366 next = find_next_zero_bit(sip->map_storep, map_size, index); 3367 else 3368 next = find_next_bit(sip->map_storep, map_size, index); 3369 3370 end = min_t(sector_t, sdebug_store_sectors, map_index_to_lba(next)); 3371 *num = end - lba; 3372 return mapped; 3373 } 3374 3375 static void map_region(struct sdeb_store_info *sip, sector_t lba, 3376 unsigned int len) 3377 { 3378 sector_t end = lba + len; 3379 3380 while (lba < end) { 3381 unsigned long index = lba_to_map_index(lba); 3382 3383 if (index < map_size) 3384 set_bit(index, sip->map_storep); 3385 3386 lba = map_index_to_lba(index + 1); 3387 } 3388 } 3389 3390 static void unmap_region(struct sdeb_store_info *sip, sector_t lba, 3391 unsigned int len) 3392 { 3393 sector_t end = lba + len; 3394 u8 *fsp = sip->storep; 3395 3396 while (lba < end) { 3397 unsigned long index = lba_to_map_index(lba); 3398 3399 if (lba == map_index_to_lba(index) && 3400 lba + sdebug_unmap_granularity <= end && 3401 index < map_size) { 3402 clear_bit(index, sip->map_storep); 3403 if (sdebug_lbprz) { /* for LBPRZ=2 return 0xff_s */ 3404 memset(fsp + lba * sdebug_sector_size, 3405 (sdebug_lbprz & 1) ? 0 : 0xff, 3406 sdebug_sector_size * 3407 sdebug_unmap_granularity); 3408 } 3409 if (sip->dif_storep) { 3410 memset(sip->dif_storep + lba, 0xff, 3411 sizeof(*sip->dif_storep) * 3412 sdebug_unmap_granularity); 3413 } 3414 } 3415 lba = map_index_to_lba(index + 1); 3416 } 3417 } 3418 3419 static int resp_write_dt0(struct scsi_cmnd *scp, struct sdebug_dev_info *devip) 3420 { 3421 bool check_prot; 3422 u32 num; 3423 u32 ei_lba; 3424 int ret; 3425 u64 lba; 3426 struct sdeb_store_info *sip = devip2sip(devip, true); 3427 rwlock_t *macc_lckp = &sip->macc_lck; 3428 u8 *cmd = scp->cmnd; 3429 3430 switch (cmd[0]) { 3431 case WRITE_16: 3432 ei_lba = 0; 3433 lba = get_unaligned_be64(cmd + 2); 3434 num = get_unaligned_be32(cmd + 10); 3435 check_prot = true; 3436 break; 3437 case WRITE_10: 3438 ei_lba = 0; 3439 lba = get_unaligned_be32(cmd + 2); 3440 num = get_unaligned_be16(cmd + 7); 3441 check_prot = true; 3442 break; 3443 case WRITE_6: 3444 ei_lba = 0; 3445 lba = (u32)cmd[3] | (u32)cmd[2] << 8 | 3446 (u32)(cmd[1] & 0x1f) << 16; 3447 num = (0 == cmd[4]) ? 256 : cmd[4]; 3448 check_prot = true; 3449 break; 3450 case WRITE_12: 3451 ei_lba = 0; 3452 lba = get_unaligned_be32(cmd + 2); 3453 num = get_unaligned_be32(cmd + 6); 3454 check_prot = true; 3455 break; 3456 case 0x53: /* XDWRITEREAD(10) */ 3457 ei_lba = 0; 3458 lba = get_unaligned_be32(cmd + 2); 3459 num = get_unaligned_be16(cmd + 7); 3460 check_prot = false; 3461 break; 3462 default: /* assume WRITE(32) */ 3463 lba = get_unaligned_be64(cmd + 12); 3464 ei_lba = get_unaligned_be32(cmd + 20); 3465 num = get_unaligned_be32(cmd + 28); 3466 check_prot = false; 3467 break; 3468 } 3469 if (unlikely(have_dif_prot && check_prot)) { 3470 if (sdebug_dif == T10_PI_TYPE2_PROTECTION && 3471 (cmd[1] & 0xe0)) { 3472 mk_sense_invalid_opcode(scp); 3473 return check_condition_result; 3474 } 3475 if ((sdebug_dif == T10_PI_TYPE1_PROTECTION || 3476 sdebug_dif == T10_PI_TYPE3_PROTECTION) && 3477 (cmd[1] & 0xe0) == 0) 3478 sdev_printk(KERN_ERR, scp->device, "Unprotected WR " 3479 "to DIF device\n"); 3480 } 3481 3482 write_lock(macc_lckp); 3483 ret = check_device_access_params(scp, lba, num, true); 3484 if (ret) { 3485 write_unlock(macc_lckp); 3486 return ret; 3487 } 3488 3489 /* DIX + T10 DIF */ 3490 if (unlikely(sdebug_dix && scsi_prot_sg_count(scp))) { 3491 switch (prot_verify_write(scp, lba, num, ei_lba)) { 3492 case 1: /* Guard tag error */ 3493 if (scp->prot_flags & SCSI_PROT_GUARD_CHECK) { 3494 write_unlock(macc_lckp); 3495 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 1); 3496 return illegal_condition_result; 3497 } else if (scp->cmnd[1] >> 5 != 3) { /* WRPROTECT != 3 */ 3498 write_unlock(macc_lckp); 3499 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 1); 3500 return check_condition_result; 3501 } 3502 break; 3503 case 3: /* Reference tag error */ 3504 if (scp->prot_flags & SCSI_PROT_REF_CHECK) { 3505 write_unlock(macc_lckp); 3506 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 3); 3507 return illegal_condition_result; 3508 } else if (scp->cmnd[1] >> 5 != 3) { /* WRPROTECT != 3 */ 3509 write_unlock(macc_lckp); 3510 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 3); 3511 return check_condition_result; 3512 } 3513 break; 3514 } 3515 } 3516 3517 ret = do_device_access(sip, scp, 0, lba, num, true); 3518 if (unlikely(scsi_debug_lbp())) 3519 map_region(sip, lba, num); 3520 /* If ZBC zone then bump its write pointer */ 3521 if (sdebug_dev_is_zoned(devip)) 3522 zbc_inc_wp(devip, lba, num); 3523 write_unlock(macc_lckp); 3524 if (unlikely(-1 == ret)) 3525 return DID_ERROR << 16; 3526 else if (unlikely(sdebug_verbose && 3527 (ret < (num * sdebug_sector_size)))) 3528 sdev_printk(KERN_INFO, scp->device, 3529 "%s: write: cdb indicated=%u, IO sent=%d bytes\n", 3530 my_name, num * sdebug_sector_size, ret); 3531 3532 if (unlikely((sdebug_opts & SDEBUG_OPT_RECOV_DIF_DIX) && 3533 atomic_read(&sdeb_inject_pending))) { 3534 if (sdebug_opts & SDEBUG_OPT_RECOVERED_ERR) { 3535 mk_sense_buffer(scp, RECOVERED_ERROR, THRESHOLD_EXCEEDED, 0); 3536 atomic_set(&sdeb_inject_pending, 0); 3537 return check_condition_result; 3538 } else if (sdebug_opts & SDEBUG_OPT_DIF_ERR) { 3539 /* Logical block guard check failed */ 3540 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 1); 3541 atomic_set(&sdeb_inject_pending, 0); 3542 return illegal_condition_result; 3543 } else if (sdebug_opts & SDEBUG_OPT_DIX_ERR) { 3544 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 1); 3545 atomic_set(&sdeb_inject_pending, 0); 3546 return illegal_condition_result; 3547 } 3548 } 3549 return 0; 3550 } 3551 3552 /* 3553 * T10 has only specified WRITE SCATTERED(16) and WRITE SCATTERED(32). 3554 * No READ GATHERED yet (requires bidi or long cdb holding gather list). 3555 */ 3556 static int resp_write_scat(struct scsi_cmnd *scp, 3557 struct sdebug_dev_info *devip) 3558 { 3559 u8 *cmd = scp->cmnd; 3560 u8 *lrdp = NULL; 3561 u8 *up; 3562 struct sdeb_store_info *sip = devip2sip(devip, true); 3563 rwlock_t *macc_lckp = &sip->macc_lck; 3564 u8 wrprotect; 3565 u16 lbdof, num_lrd, k; 3566 u32 num, num_by, bt_len, lbdof_blen, sg_off, cum_lb; 3567 u32 lb_size = sdebug_sector_size; 3568 u32 ei_lba; 3569 u64 lba; 3570 int ret, res; 3571 bool is_16; 3572 static const u32 lrd_size = 32; /* + parameter list header size */ 3573 3574 if (cmd[0] == VARIABLE_LENGTH_CMD) { 3575 is_16 = false; 3576 wrprotect = (cmd[10] >> 5) & 0x7; 3577 lbdof = get_unaligned_be16(cmd + 12); 3578 num_lrd = get_unaligned_be16(cmd + 16); 3579 bt_len = get_unaligned_be32(cmd + 28); 3580 } else { /* that leaves WRITE SCATTERED(16) */ 3581 is_16 = true; 3582 wrprotect = (cmd[2] >> 5) & 0x7; 3583 lbdof = get_unaligned_be16(cmd + 4); 3584 num_lrd = get_unaligned_be16(cmd + 8); 3585 bt_len = get_unaligned_be32(cmd + 10); 3586 if (unlikely(have_dif_prot)) { 3587 if (sdebug_dif == T10_PI_TYPE2_PROTECTION && 3588 wrprotect) { 3589 mk_sense_invalid_opcode(scp); 3590 return illegal_condition_result; 3591 } 3592 if ((sdebug_dif == T10_PI_TYPE1_PROTECTION || 3593 sdebug_dif == T10_PI_TYPE3_PROTECTION) && 3594 wrprotect == 0) 3595 sdev_printk(KERN_ERR, scp->device, 3596 "Unprotected WR to DIF device\n"); 3597 } 3598 } 3599 if ((num_lrd == 0) || (bt_len == 0)) 3600 return 0; /* T10 says these do-nothings are not errors */ 3601 if (lbdof == 0) { 3602 if (sdebug_verbose) 3603 sdev_printk(KERN_INFO, scp->device, 3604 "%s: %s: LB Data Offset field bad\n", 3605 my_name, __func__); 3606 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0); 3607 return illegal_condition_result; 3608 } 3609 lbdof_blen = lbdof * lb_size; 3610 if ((lrd_size + (num_lrd * lrd_size)) > lbdof_blen) { 3611 if (sdebug_verbose) 3612 sdev_printk(KERN_INFO, scp->device, 3613 "%s: %s: LBA range descriptors don't fit\n", 3614 my_name, __func__); 3615 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0); 3616 return illegal_condition_result; 3617 } 3618 lrdp = kzalloc(lbdof_blen, GFP_ATOMIC); 3619 if (lrdp == NULL) 3620 return SCSI_MLQUEUE_HOST_BUSY; 3621 if (sdebug_verbose) 3622 sdev_printk(KERN_INFO, scp->device, 3623 "%s: %s: Fetch header+scatter_list, lbdof_blen=%u\n", 3624 my_name, __func__, lbdof_blen); 3625 res = fetch_to_dev_buffer(scp, lrdp, lbdof_blen); 3626 if (res == -1) { 3627 ret = DID_ERROR << 16; 3628 goto err_out; 3629 } 3630 3631 write_lock(macc_lckp); 3632 sg_off = lbdof_blen; 3633 /* Spec says Buffer xfer Length field in number of LBs in dout */ 3634 cum_lb = 0; 3635 for (k = 0, up = lrdp + lrd_size; k < num_lrd; ++k, up += lrd_size) { 3636 lba = get_unaligned_be64(up + 0); 3637 num = get_unaligned_be32(up + 8); 3638 if (sdebug_verbose) 3639 sdev_printk(KERN_INFO, scp->device, 3640 "%s: %s: k=%d LBA=0x%llx num=%u sg_off=%u\n", 3641 my_name, __func__, k, lba, num, sg_off); 3642 if (num == 0) 3643 continue; 3644 ret = check_device_access_params(scp, lba, num, true); 3645 if (ret) 3646 goto err_out_unlock; 3647 num_by = num * lb_size; 3648 ei_lba = is_16 ? 0 : get_unaligned_be32(up + 12); 3649 3650 if ((cum_lb + num) > bt_len) { 3651 if (sdebug_verbose) 3652 sdev_printk(KERN_INFO, scp->device, 3653 "%s: %s: sum of blocks > data provided\n", 3654 my_name, __func__); 3655 mk_sense_buffer(scp, ILLEGAL_REQUEST, WRITE_ERROR_ASC, 3656 0); 3657 ret = illegal_condition_result; 3658 goto err_out_unlock; 3659 } 3660 3661 /* DIX + T10 DIF */ 3662 if (unlikely(sdebug_dix && scsi_prot_sg_count(scp))) { 3663 int prot_ret = prot_verify_write(scp, lba, num, 3664 ei_lba); 3665 3666 if (prot_ret) { 3667 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 3668 prot_ret); 3669 ret = illegal_condition_result; 3670 goto err_out_unlock; 3671 } 3672 } 3673 3674 ret = do_device_access(sip, scp, sg_off, lba, num, true); 3675 /* If ZBC zone then bump its write pointer */ 3676 if (sdebug_dev_is_zoned(devip)) 3677 zbc_inc_wp(devip, lba, num); 3678 if (unlikely(scsi_debug_lbp())) 3679 map_region(sip, lba, num); 3680 if (unlikely(-1 == ret)) { 3681 ret = DID_ERROR << 16; 3682 goto err_out_unlock; 3683 } else if (unlikely(sdebug_verbose && (ret < num_by))) 3684 sdev_printk(KERN_INFO, scp->device, 3685 "%s: write: cdb indicated=%u, IO sent=%d bytes\n", 3686 my_name, num_by, ret); 3687 3688 if (unlikely((sdebug_opts & SDEBUG_OPT_RECOV_DIF_DIX) && 3689 atomic_read(&sdeb_inject_pending))) { 3690 if (sdebug_opts & SDEBUG_OPT_RECOVERED_ERR) { 3691 mk_sense_buffer(scp, RECOVERED_ERROR, THRESHOLD_EXCEEDED, 0); 3692 atomic_set(&sdeb_inject_pending, 0); 3693 ret = check_condition_result; 3694 goto err_out_unlock; 3695 } else if (sdebug_opts & SDEBUG_OPT_DIF_ERR) { 3696 /* Logical block guard check failed */ 3697 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 1); 3698 atomic_set(&sdeb_inject_pending, 0); 3699 ret = illegal_condition_result; 3700 goto err_out_unlock; 3701 } else if (sdebug_opts & SDEBUG_OPT_DIX_ERR) { 3702 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 1); 3703 atomic_set(&sdeb_inject_pending, 0); 3704 ret = illegal_condition_result; 3705 goto err_out_unlock; 3706 } 3707 } 3708 sg_off += num_by; 3709 cum_lb += num; 3710 } 3711 ret = 0; 3712 err_out_unlock: 3713 write_unlock(macc_lckp); 3714 err_out: 3715 kfree(lrdp); 3716 return ret; 3717 } 3718 3719 static int resp_write_same(struct scsi_cmnd *scp, u64 lba, u32 num, 3720 u32 ei_lba, bool unmap, bool ndob) 3721 { 3722 struct scsi_device *sdp = scp->device; 3723 struct sdebug_dev_info *devip = (struct sdebug_dev_info *)sdp->hostdata; 3724 unsigned long long i; 3725 u64 block, lbaa; 3726 u32 lb_size = sdebug_sector_size; 3727 int ret; 3728 struct sdeb_store_info *sip = devip2sip((struct sdebug_dev_info *) 3729 scp->device->hostdata, true); 3730 rwlock_t *macc_lckp = &sip->macc_lck; 3731 u8 *fs1p; 3732 u8 *fsp; 3733 3734 write_lock(macc_lckp); 3735 3736 ret = check_device_access_params(scp, lba, num, true); 3737 if (ret) { 3738 write_unlock(macc_lckp); 3739 return ret; 3740 } 3741 3742 if (unmap && scsi_debug_lbp()) { 3743 unmap_region(sip, lba, num); 3744 goto out; 3745 } 3746 lbaa = lba; 3747 block = do_div(lbaa, sdebug_store_sectors); 3748 /* if ndob then zero 1 logical block, else fetch 1 logical block */ 3749 fsp = sip->storep; 3750 fs1p = fsp + (block * lb_size); 3751 if (ndob) { 3752 memset(fs1p, 0, lb_size); 3753 ret = 0; 3754 } else 3755 ret = fetch_to_dev_buffer(scp, fs1p, lb_size); 3756 3757 if (-1 == ret) { 3758 write_unlock(&sip->macc_lck); 3759 return DID_ERROR << 16; 3760 } else if (sdebug_verbose && !ndob && (ret < lb_size)) 3761 sdev_printk(KERN_INFO, scp->device, 3762 "%s: %s: lb size=%u, IO sent=%d bytes\n", 3763 my_name, "write same", lb_size, ret); 3764 3765 /* Copy first sector to remaining blocks */ 3766 for (i = 1 ; i < num ; i++) { 3767 lbaa = lba + i; 3768 block = do_div(lbaa, sdebug_store_sectors); 3769 memmove(fsp + (block * lb_size), fs1p, lb_size); 3770 } 3771 if (scsi_debug_lbp()) 3772 map_region(sip, lba, num); 3773 /* If ZBC zone then bump its write pointer */ 3774 if (sdebug_dev_is_zoned(devip)) 3775 zbc_inc_wp(devip, lba, num); 3776 out: 3777 write_unlock(macc_lckp); 3778 3779 return 0; 3780 } 3781 3782 static int resp_write_same_10(struct scsi_cmnd *scp, 3783 struct sdebug_dev_info *devip) 3784 { 3785 u8 *cmd = scp->cmnd; 3786 u32 lba; 3787 u16 num; 3788 u32 ei_lba = 0; 3789 bool unmap = false; 3790 3791 if (cmd[1] & 0x8) { 3792 if (sdebug_lbpws10 == 0) { 3793 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 3); 3794 return check_condition_result; 3795 } else 3796 unmap = true; 3797 } 3798 lba = get_unaligned_be32(cmd + 2); 3799 num = get_unaligned_be16(cmd + 7); 3800 if (num > sdebug_write_same_length) { 3801 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 7, -1); 3802 return check_condition_result; 3803 } 3804 return resp_write_same(scp, lba, num, ei_lba, unmap, false); 3805 } 3806 3807 static int resp_write_same_16(struct scsi_cmnd *scp, 3808 struct sdebug_dev_info *devip) 3809 { 3810 u8 *cmd = scp->cmnd; 3811 u64 lba; 3812 u32 num; 3813 u32 ei_lba = 0; 3814 bool unmap = false; 3815 bool ndob = false; 3816 3817 if (cmd[1] & 0x8) { /* UNMAP */ 3818 if (sdebug_lbpws == 0) { 3819 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 3); 3820 return check_condition_result; 3821 } else 3822 unmap = true; 3823 } 3824 if (cmd[1] & 0x1) /* NDOB (no data-out buffer, assumes zeroes) */ 3825 ndob = true; 3826 lba = get_unaligned_be64(cmd + 2); 3827 num = get_unaligned_be32(cmd + 10); 3828 if (num > sdebug_write_same_length) { 3829 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 10, -1); 3830 return check_condition_result; 3831 } 3832 return resp_write_same(scp, lba, num, ei_lba, unmap, ndob); 3833 } 3834 3835 /* Note the mode field is in the same position as the (lower) service action 3836 * field. For the Report supported operation codes command, SPC-4 suggests 3837 * each mode of this command should be reported separately; for future. */ 3838 static int resp_write_buffer(struct scsi_cmnd *scp, 3839 struct sdebug_dev_info *devip) 3840 { 3841 u8 *cmd = scp->cmnd; 3842 struct scsi_device *sdp = scp->device; 3843 struct sdebug_dev_info *dp; 3844 u8 mode; 3845 3846 mode = cmd[1] & 0x1f; 3847 switch (mode) { 3848 case 0x4: /* download microcode (MC) and activate (ACT) */ 3849 /* set UAs on this device only */ 3850 set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm); 3851 set_bit(SDEBUG_UA_MICROCODE_CHANGED, devip->uas_bm); 3852 break; 3853 case 0x5: /* download MC, save and ACT */ 3854 set_bit(SDEBUG_UA_MICROCODE_CHANGED_WO_RESET, devip->uas_bm); 3855 break; 3856 case 0x6: /* download MC with offsets and ACT */ 3857 /* set UAs on most devices (LUs) in this target */ 3858 list_for_each_entry(dp, 3859 &devip->sdbg_host->dev_info_list, 3860 dev_list) 3861 if (dp->target == sdp->id) { 3862 set_bit(SDEBUG_UA_BUS_RESET, dp->uas_bm); 3863 if (devip != dp) 3864 set_bit(SDEBUG_UA_MICROCODE_CHANGED, 3865 dp->uas_bm); 3866 } 3867 break; 3868 case 0x7: /* download MC with offsets, save, and ACT */ 3869 /* set UA on all devices (LUs) in this target */ 3870 list_for_each_entry(dp, 3871 &devip->sdbg_host->dev_info_list, 3872 dev_list) 3873 if (dp->target == sdp->id) 3874 set_bit(SDEBUG_UA_MICROCODE_CHANGED_WO_RESET, 3875 dp->uas_bm); 3876 break; 3877 default: 3878 /* do nothing for this command for other mode values */ 3879 break; 3880 } 3881 return 0; 3882 } 3883 3884 static int resp_comp_write(struct scsi_cmnd *scp, 3885 struct sdebug_dev_info *devip) 3886 { 3887 u8 *cmd = scp->cmnd; 3888 u8 *arr; 3889 struct sdeb_store_info *sip = devip2sip(devip, true); 3890 rwlock_t *macc_lckp = &sip->macc_lck; 3891 u64 lba; 3892 u32 dnum; 3893 u32 lb_size = sdebug_sector_size; 3894 u8 num; 3895 int ret; 3896 int retval = 0; 3897 3898 lba = get_unaligned_be64(cmd + 2); 3899 num = cmd[13]; /* 1 to a maximum of 255 logical blocks */ 3900 if (0 == num) 3901 return 0; /* degenerate case, not an error */ 3902 if (sdebug_dif == T10_PI_TYPE2_PROTECTION && 3903 (cmd[1] & 0xe0)) { 3904 mk_sense_invalid_opcode(scp); 3905 return check_condition_result; 3906 } 3907 if ((sdebug_dif == T10_PI_TYPE1_PROTECTION || 3908 sdebug_dif == T10_PI_TYPE3_PROTECTION) && 3909 (cmd[1] & 0xe0) == 0) 3910 sdev_printk(KERN_ERR, scp->device, "Unprotected WR " 3911 "to DIF device\n"); 3912 ret = check_device_access_params(scp, lba, num, false); 3913 if (ret) 3914 return ret; 3915 dnum = 2 * num; 3916 arr = kcalloc(lb_size, dnum, GFP_ATOMIC); 3917 if (NULL == arr) { 3918 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC, 3919 INSUFF_RES_ASCQ); 3920 return check_condition_result; 3921 } 3922 3923 write_lock(macc_lckp); 3924 3925 ret = do_dout_fetch(scp, dnum, arr); 3926 if (ret == -1) { 3927 retval = DID_ERROR << 16; 3928 goto cleanup; 3929 } else if (sdebug_verbose && (ret < (dnum * lb_size))) 3930 sdev_printk(KERN_INFO, scp->device, "%s: compare_write: cdb " 3931 "indicated=%u, IO sent=%d bytes\n", my_name, 3932 dnum * lb_size, ret); 3933 if (!comp_write_worker(sip, lba, num, arr, false)) { 3934 mk_sense_buffer(scp, MISCOMPARE, MISCOMPARE_VERIFY_ASC, 0); 3935 retval = check_condition_result; 3936 goto cleanup; 3937 } 3938 if (scsi_debug_lbp()) 3939 map_region(sip, lba, num); 3940 cleanup: 3941 write_unlock(macc_lckp); 3942 kfree(arr); 3943 return retval; 3944 } 3945 3946 struct unmap_block_desc { 3947 __be64 lba; 3948 __be32 blocks; 3949 __be32 __reserved; 3950 }; 3951 3952 static int resp_unmap(struct scsi_cmnd *scp, struct sdebug_dev_info *devip) 3953 { 3954 unsigned char *buf; 3955 struct unmap_block_desc *desc; 3956 struct sdeb_store_info *sip = devip2sip(devip, true); 3957 rwlock_t *macc_lckp = &sip->macc_lck; 3958 unsigned int i, payload_len, descriptors; 3959 int ret; 3960 3961 if (!scsi_debug_lbp()) 3962 return 0; /* fib and say its done */ 3963 payload_len = get_unaligned_be16(scp->cmnd + 7); 3964 BUG_ON(scsi_bufflen(scp) != payload_len); 3965 3966 descriptors = (payload_len - 8) / 16; 3967 if (descriptors > sdebug_unmap_max_desc) { 3968 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 7, -1); 3969 return check_condition_result; 3970 } 3971 3972 buf = kzalloc(scsi_bufflen(scp), GFP_ATOMIC); 3973 if (!buf) { 3974 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC, 3975 INSUFF_RES_ASCQ); 3976 return check_condition_result; 3977 } 3978 3979 scsi_sg_copy_to_buffer(scp, buf, scsi_bufflen(scp)); 3980 3981 BUG_ON(get_unaligned_be16(&buf[0]) != payload_len - 2); 3982 BUG_ON(get_unaligned_be16(&buf[2]) != descriptors * 16); 3983 3984 desc = (void *)&buf[8]; 3985 3986 write_lock(macc_lckp); 3987 3988 for (i = 0 ; i < descriptors ; i++) { 3989 unsigned long long lba = get_unaligned_be64(&desc[i].lba); 3990 unsigned int num = get_unaligned_be32(&desc[i].blocks); 3991 3992 ret = check_device_access_params(scp, lba, num, true); 3993 if (ret) 3994 goto out; 3995 3996 unmap_region(sip, lba, num); 3997 } 3998 3999 ret = 0; 4000 4001 out: 4002 write_unlock(macc_lckp); 4003 kfree(buf); 4004 4005 return ret; 4006 } 4007 4008 #define SDEBUG_GET_LBA_STATUS_LEN 32 4009 4010 static int resp_get_lba_status(struct scsi_cmnd *scp, 4011 struct sdebug_dev_info *devip) 4012 { 4013 u8 *cmd = scp->cmnd; 4014 u64 lba; 4015 u32 alloc_len, mapped, num; 4016 int ret; 4017 u8 arr[SDEBUG_GET_LBA_STATUS_LEN]; 4018 4019 lba = get_unaligned_be64(cmd + 2); 4020 alloc_len = get_unaligned_be32(cmd + 10); 4021 4022 if (alloc_len < 24) 4023 return 0; 4024 4025 ret = check_device_access_params(scp, lba, 1, false); 4026 if (ret) 4027 return ret; 4028 4029 if (scsi_debug_lbp()) { 4030 struct sdeb_store_info *sip = devip2sip(devip, true); 4031 4032 mapped = map_state(sip, lba, &num); 4033 } else { 4034 mapped = 1; 4035 /* following just in case virtual_gb changed */ 4036 sdebug_capacity = get_sdebug_capacity(); 4037 if (sdebug_capacity - lba <= 0xffffffff) 4038 num = sdebug_capacity - lba; 4039 else 4040 num = 0xffffffff; 4041 } 4042 4043 memset(arr, 0, SDEBUG_GET_LBA_STATUS_LEN); 4044 put_unaligned_be32(20, arr); /* Parameter Data Length */ 4045 put_unaligned_be64(lba, arr + 8); /* LBA */ 4046 put_unaligned_be32(num, arr + 16); /* Number of blocks */ 4047 arr[20] = !mapped; /* prov_stat=0: mapped; 1: dealloc */ 4048 4049 return fill_from_dev_buffer(scp, arr, SDEBUG_GET_LBA_STATUS_LEN); 4050 } 4051 4052 static int resp_sync_cache(struct scsi_cmnd *scp, 4053 struct sdebug_dev_info *devip) 4054 { 4055 int res = 0; 4056 u64 lba; 4057 u32 num_blocks; 4058 u8 *cmd = scp->cmnd; 4059 4060 if (cmd[0] == SYNCHRONIZE_CACHE) { /* 10 byte cdb */ 4061 lba = get_unaligned_be32(cmd + 2); 4062 num_blocks = get_unaligned_be16(cmd + 7); 4063 } else { /* SYNCHRONIZE_CACHE(16) */ 4064 lba = get_unaligned_be64(cmd + 2); 4065 num_blocks = get_unaligned_be32(cmd + 10); 4066 } 4067 if (lba + num_blocks > sdebug_capacity) { 4068 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0); 4069 return check_condition_result; 4070 } 4071 if (!write_since_sync || (cmd[1] & 0x2)) 4072 res = SDEG_RES_IMMED_MASK; 4073 else /* delay if write_since_sync and IMMED clear */ 4074 write_since_sync = false; 4075 return res; 4076 } 4077 4078 /* 4079 * Assuming the LBA+num_blocks is not out-of-range, this function will return 4080 * CONDITION MET if the specified blocks will/have fitted in the cache, and 4081 * a GOOD status otherwise. Model a disk with a big cache and yield 4082 * CONDITION MET. Actually tries to bring range in main memory into the 4083 * cache associated with the CPU(s). 4084 */ 4085 static int resp_pre_fetch(struct scsi_cmnd *scp, 4086 struct sdebug_dev_info *devip) 4087 { 4088 int res = 0; 4089 u64 lba; 4090 u64 block, rest = 0; 4091 u32 nblks; 4092 u8 *cmd = scp->cmnd; 4093 struct sdeb_store_info *sip = devip2sip(devip, true); 4094 rwlock_t *macc_lckp = &sip->macc_lck; 4095 u8 *fsp = sip->storep; 4096 4097 if (cmd[0] == PRE_FETCH) { /* 10 byte cdb */ 4098 lba = get_unaligned_be32(cmd + 2); 4099 nblks = get_unaligned_be16(cmd + 7); 4100 } else { /* PRE-FETCH(16) */ 4101 lba = get_unaligned_be64(cmd + 2); 4102 nblks = get_unaligned_be32(cmd + 10); 4103 } 4104 if (lba + nblks > sdebug_capacity) { 4105 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0); 4106 return check_condition_result; 4107 } 4108 if (!fsp) 4109 goto fini; 4110 /* PRE-FETCH spec says nothing about LBP or PI so skip them */ 4111 block = do_div(lba, sdebug_store_sectors); 4112 if (block + nblks > sdebug_store_sectors) 4113 rest = block + nblks - sdebug_store_sectors; 4114 4115 /* Try to bring the PRE-FETCH range into CPU's cache */ 4116 read_lock(macc_lckp); 4117 prefetch_range(fsp + (sdebug_sector_size * block), 4118 (nblks - rest) * sdebug_sector_size); 4119 if (rest) 4120 prefetch_range(fsp, rest * sdebug_sector_size); 4121 read_unlock(macc_lckp); 4122 fini: 4123 if (cmd[1] & 0x2) 4124 res = SDEG_RES_IMMED_MASK; 4125 return res | condition_met_result; 4126 } 4127 4128 #define RL_BUCKET_ELEMS 8 4129 4130 /* Even though each pseudo target has a REPORT LUNS "well known logical unit" 4131 * (W-LUN), the normal Linux scanning logic does not associate it with a 4132 * device (e.g. /dev/sg7). The following magic will make that association: 4133 * "cd /sys/class/scsi_host/host<n> ; echo '- - 49409' > scan" 4134 * where <n> is a host number. If there are multiple targets in a host then 4135 * the above will associate a W-LUN to each target. To only get a W-LUN 4136 * for target 2, then use "echo '- 2 49409' > scan" . 4137 */ 4138 static int resp_report_luns(struct scsi_cmnd *scp, 4139 struct sdebug_dev_info *devip) 4140 { 4141 unsigned char *cmd = scp->cmnd; 4142 unsigned int alloc_len; 4143 unsigned char select_report; 4144 u64 lun; 4145 struct scsi_lun *lun_p; 4146 u8 arr[RL_BUCKET_ELEMS * sizeof(struct scsi_lun)]; 4147 unsigned int lun_cnt; /* normal LUN count (max: 256) */ 4148 unsigned int wlun_cnt; /* report luns W-LUN count */ 4149 unsigned int tlun_cnt; /* total LUN count */ 4150 unsigned int rlen; /* response length (in bytes) */ 4151 int k, j, n, res; 4152 unsigned int off_rsp = 0; 4153 const int sz_lun = sizeof(struct scsi_lun); 4154 4155 clear_luns_changed_on_target(devip); 4156 4157 select_report = cmd[2]; 4158 alloc_len = get_unaligned_be32(cmd + 6); 4159 4160 if (alloc_len < 4) { 4161 pr_err("alloc len too small %d\n", alloc_len); 4162 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 6, -1); 4163 return check_condition_result; 4164 } 4165 4166 switch (select_report) { 4167 case 0: /* all LUNs apart from W-LUNs */ 4168 lun_cnt = sdebug_max_luns; 4169 wlun_cnt = 0; 4170 break; 4171 case 1: /* only W-LUNs */ 4172 lun_cnt = 0; 4173 wlun_cnt = 1; 4174 break; 4175 case 2: /* all LUNs */ 4176 lun_cnt = sdebug_max_luns; 4177 wlun_cnt = 1; 4178 break; 4179 case 0x10: /* only administrative LUs */ 4180 case 0x11: /* see SPC-5 */ 4181 case 0x12: /* only subsiduary LUs owned by referenced LU */ 4182 default: 4183 pr_debug("select report invalid %d\n", select_report); 4184 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, -1); 4185 return check_condition_result; 4186 } 4187 4188 if (sdebug_no_lun_0 && (lun_cnt > 0)) 4189 --lun_cnt; 4190 4191 tlun_cnt = lun_cnt + wlun_cnt; 4192 rlen = tlun_cnt * sz_lun; /* excluding 8 byte header */ 4193 scsi_set_resid(scp, scsi_bufflen(scp)); 4194 pr_debug("select_report %d luns = %d wluns = %d no_lun0 %d\n", 4195 select_report, lun_cnt, wlun_cnt, sdebug_no_lun_0); 4196 4197 /* loops rely on sizeof response header same as sizeof lun (both 8) */ 4198 lun = sdebug_no_lun_0 ? 1 : 0; 4199 for (k = 0, j = 0, res = 0; true; ++k, j = 0) { 4200 memset(arr, 0, sizeof(arr)); 4201 lun_p = (struct scsi_lun *)&arr[0]; 4202 if (k == 0) { 4203 put_unaligned_be32(rlen, &arr[0]); 4204 ++lun_p; 4205 j = 1; 4206 } 4207 for ( ; j < RL_BUCKET_ELEMS; ++j, ++lun_p) { 4208 if ((k * RL_BUCKET_ELEMS) + j > lun_cnt) 4209 break; 4210 int_to_scsilun(lun++, lun_p); 4211 if (lun > 1 && sdebug_lun_am == SAM_LUN_AM_FLAT) 4212 lun_p->scsi_lun[0] |= 0x40; 4213 } 4214 if (j < RL_BUCKET_ELEMS) 4215 break; 4216 n = j * sz_lun; 4217 res = p_fill_from_dev_buffer(scp, arr, n, off_rsp); 4218 if (res) 4219 return res; 4220 off_rsp += n; 4221 } 4222 if (wlun_cnt) { 4223 int_to_scsilun(SCSI_W_LUN_REPORT_LUNS, lun_p); 4224 ++j; 4225 } 4226 if (j > 0) 4227 res = p_fill_from_dev_buffer(scp, arr, j * sz_lun, off_rsp); 4228 return res; 4229 } 4230 4231 static int resp_verify(struct scsi_cmnd *scp, struct sdebug_dev_info *devip) 4232 { 4233 bool is_bytchk3 = false; 4234 u8 bytchk; 4235 int ret, j; 4236 u32 vnum, a_num, off; 4237 const u32 lb_size = sdebug_sector_size; 4238 u64 lba; 4239 u8 *arr; 4240 u8 *cmd = scp->cmnd; 4241 struct sdeb_store_info *sip = devip2sip(devip, true); 4242 rwlock_t *macc_lckp = &sip->macc_lck; 4243 4244 bytchk = (cmd[1] >> 1) & 0x3; 4245 if (bytchk == 0) { 4246 return 0; /* always claim internal verify okay */ 4247 } else if (bytchk == 2) { 4248 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 2); 4249 return check_condition_result; 4250 } else if (bytchk == 3) { 4251 is_bytchk3 = true; /* 1 block sent, compared repeatedly */ 4252 } 4253 switch (cmd[0]) { 4254 case VERIFY_16: 4255 lba = get_unaligned_be64(cmd + 2); 4256 vnum = get_unaligned_be32(cmd + 10); 4257 break; 4258 case VERIFY: /* is VERIFY(10) */ 4259 lba = get_unaligned_be32(cmd + 2); 4260 vnum = get_unaligned_be16(cmd + 7); 4261 break; 4262 default: 4263 mk_sense_invalid_opcode(scp); 4264 return check_condition_result; 4265 } 4266 if (vnum == 0) 4267 return 0; /* not an error */ 4268 a_num = is_bytchk3 ? 1 : vnum; 4269 /* Treat following check like one for read (i.e. no write) access */ 4270 ret = check_device_access_params(scp, lba, a_num, false); 4271 if (ret) 4272 return ret; 4273 4274 arr = kcalloc(lb_size, vnum, GFP_ATOMIC); 4275 if (!arr) { 4276 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC, 4277 INSUFF_RES_ASCQ); 4278 return check_condition_result; 4279 } 4280 /* Not changing store, so only need read access */ 4281 read_lock(macc_lckp); 4282 4283 ret = do_dout_fetch(scp, a_num, arr); 4284 if (ret == -1) { 4285 ret = DID_ERROR << 16; 4286 goto cleanup; 4287 } else if (sdebug_verbose && (ret < (a_num * lb_size))) { 4288 sdev_printk(KERN_INFO, scp->device, 4289 "%s: %s: cdb indicated=%u, IO sent=%d bytes\n", 4290 my_name, __func__, a_num * lb_size, ret); 4291 } 4292 if (is_bytchk3) { 4293 for (j = 1, off = lb_size; j < vnum; ++j, off += lb_size) 4294 memcpy(arr + off, arr, lb_size); 4295 } 4296 ret = 0; 4297 if (!comp_write_worker(sip, lba, vnum, arr, true)) { 4298 mk_sense_buffer(scp, MISCOMPARE, MISCOMPARE_VERIFY_ASC, 0); 4299 ret = check_condition_result; 4300 goto cleanup; 4301 } 4302 cleanup: 4303 read_unlock(macc_lckp); 4304 kfree(arr); 4305 return ret; 4306 } 4307 4308 #define RZONES_DESC_HD 64 4309 4310 /* Report zones depending on start LBA nad reporting options */ 4311 static int resp_report_zones(struct scsi_cmnd *scp, 4312 struct sdebug_dev_info *devip) 4313 { 4314 unsigned int i, max_zones, rep_max_zones, nrz = 0; 4315 int ret = 0; 4316 u32 alloc_len, rep_opts, rep_len; 4317 bool partial; 4318 u64 lba, zs_lba; 4319 u8 *arr = NULL, *desc; 4320 u8 *cmd = scp->cmnd; 4321 struct sdeb_zone_state *zsp; 4322 struct sdeb_store_info *sip = devip2sip(devip, false); 4323 rwlock_t *macc_lckp = sip ? &sip->macc_lck : &sdeb_fake_rw_lck; 4324 4325 if (!sdebug_dev_is_zoned(devip)) { 4326 mk_sense_invalid_opcode(scp); 4327 return check_condition_result; 4328 } 4329 zs_lba = get_unaligned_be64(cmd + 2); 4330 alloc_len = get_unaligned_be32(cmd + 10); 4331 if (alloc_len == 0) 4332 return 0; /* not an error */ 4333 rep_opts = cmd[14] & 0x3f; 4334 partial = cmd[14] & 0x80; 4335 4336 if (zs_lba >= sdebug_capacity) { 4337 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0); 4338 return check_condition_result; 4339 } 4340 4341 max_zones = devip->nr_zones - (zs_lba >> devip->zsize_shift); 4342 rep_max_zones = min((alloc_len - 64) >> ilog2(RZONES_DESC_HD), 4343 max_zones); 4344 4345 arr = kzalloc(alloc_len, GFP_ATOMIC); 4346 if (!arr) { 4347 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC, 4348 INSUFF_RES_ASCQ); 4349 return check_condition_result; 4350 } 4351 4352 read_lock(macc_lckp); 4353 4354 desc = arr + 64; 4355 for (i = 0; i < max_zones; i++) { 4356 lba = zs_lba + devip->zsize * i; 4357 if (lba > sdebug_capacity) 4358 break; 4359 zsp = zbc_zone(devip, lba); 4360 switch (rep_opts) { 4361 case 0x00: 4362 /* All zones */ 4363 break; 4364 case 0x01: 4365 /* Empty zones */ 4366 if (zsp->z_cond != ZC1_EMPTY) 4367 continue; 4368 break; 4369 case 0x02: 4370 /* Implicit open zones */ 4371 if (zsp->z_cond != ZC2_IMPLICIT_OPEN) 4372 continue; 4373 break; 4374 case 0x03: 4375 /* Explicit open zones */ 4376 if (zsp->z_cond != ZC3_EXPLICIT_OPEN) 4377 continue; 4378 break; 4379 case 0x04: 4380 /* Closed zones */ 4381 if (zsp->z_cond != ZC4_CLOSED) 4382 continue; 4383 break; 4384 case 0x05: 4385 /* Full zones */ 4386 if (zsp->z_cond != ZC5_FULL) 4387 continue; 4388 break; 4389 case 0x06: 4390 case 0x07: 4391 case 0x10: 4392 /* 4393 * Read-only, offline, reset WP recommended are 4394 * not emulated: no zones to report; 4395 */ 4396 continue; 4397 case 0x11: 4398 /* non-seq-resource set */ 4399 if (!zsp->z_non_seq_resource) 4400 continue; 4401 break; 4402 case 0x3f: 4403 /* Not write pointer (conventional) zones */ 4404 if (!zbc_zone_is_conv(zsp)) 4405 continue; 4406 break; 4407 default: 4408 mk_sense_buffer(scp, ILLEGAL_REQUEST, 4409 INVALID_FIELD_IN_CDB, 0); 4410 ret = check_condition_result; 4411 goto fini; 4412 } 4413 4414 if (nrz < rep_max_zones) { 4415 /* Fill zone descriptor */ 4416 desc[0] = zsp->z_type; 4417 desc[1] = zsp->z_cond << 4; 4418 if (zsp->z_non_seq_resource) 4419 desc[1] |= 1 << 1; 4420 put_unaligned_be64((u64)zsp->z_size, desc + 8); 4421 put_unaligned_be64((u64)zsp->z_start, desc + 16); 4422 put_unaligned_be64((u64)zsp->z_wp, desc + 24); 4423 desc += 64; 4424 } 4425 4426 if (partial && nrz >= rep_max_zones) 4427 break; 4428 4429 nrz++; 4430 } 4431 4432 /* Report header */ 4433 put_unaligned_be32(nrz * RZONES_DESC_HD, arr + 0); 4434 put_unaligned_be64(sdebug_capacity - 1, arr + 8); 4435 4436 rep_len = (unsigned long)desc - (unsigned long)arr; 4437 ret = fill_from_dev_buffer(scp, arr, min_t(u32, alloc_len, rep_len)); 4438 4439 fini: 4440 read_unlock(macc_lckp); 4441 kfree(arr); 4442 return ret; 4443 } 4444 4445 /* Logic transplanted from tcmu-runner, file_zbc.c */ 4446 static void zbc_open_all(struct sdebug_dev_info *devip) 4447 { 4448 struct sdeb_zone_state *zsp = &devip->zstate[0]; 4449 unsigned int i; 4450 4451 for (i = 0; i < devip->nr_zones; i++, zsp++) { 4452 if (zsp->z_cond == ZC4_CLOSED) 4453 zbc_open_zone(devip, &devip->zstate[i], true); 4454 } 4455 } 4456 4457 static int resp_open_zone(struct scsi_cmnd *scp, struct sdebug_dev_info *devip) 4458 { 4459 int res = 0; 4460 u64 z_id; 4461 enum sdebug_z_cond zc; 4462 u8 *cmd = scp->cmnd; 4463 struct sdeb_zone_state *zsp; 4464 bool all = cmd[14] & 0x01; 4465 struct sdeb_store_info *sip = devip2sip(devip, false); 4466 rwlock_t *macc_lckp = sip ? &sip->macc_lck : &sdeb_fake_rw_lck; 4467 4468 if (!sdebug_dev_is_zoned(devip)) { 4469 mk_sense_invalid_opcode(scp); 4470 return check_condition_result; 4471 } 4472 4473 write_lock(macc_lckp); 4474 4475 if (all) { 4476 /* Check if all closed zones can be open */ 4477 if (devip->max_open && 4478 devip->nr_exp_open + devip->nr_closed > devip->max_open) { 4479 mk_sense_buffer(scp, DATA_PROTECT, INSUFF_RES_ASC, 4480 INSUFF_ZONE_ASCQ); 4481 res = check_condition_result; 4482 goto fini; 4483 } 4484 /* Open all closed zones */ 4485 zbc_open_all(devip); 4486 goto fini; 4487 } 4488 4489 /* Open the specified zone */ 4490 z_id = get_unaligned_be64(cmd + 2); 4491 if (z_id >= sdebug_capacity) { 4492 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0); 4493 res = check_condition_result; 4494 goto fini; 4495 } 4496 4497 zsp = zbc_zone(devip, z_id); 4498 if (z_id != zsp->z_start) { 4499 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0); 4500 res = check_condition_result; 4501 goto fini; 4502 } 4503 if (zbc_zone_is_conv(zsp)) { 4504 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0); 4505 res = check_condition_result; 4506 goto fini; 4507 } 4508 4509 zc = zsp->z_cond; 4510 if (zc == ZC3_EXPLICIT_OPEN || zc == ZC5_FULL) 4511 goto fini; 4512 4513 if (devip->max_open && devip->nr_exp_open >= devip->max_open) { 4514 mk_sense_buffer(scp, DATA_PROTECT, INSUFF_RES_ASC, 4515 INSUFF_ZONE_ASCQ); 4516 res = check_condition_result; 4517 goto fini; 4518 } 4519 4520 zbc_open_zone(devip, zsp, true); 4521 fini: 4522 write_unlock(macc_lckp); 4523 return res; 4524 } 4525 4526 static void zbc_close_all(struct sdebug_dev_info *devip) 4527 { 4528 unsigned int i; 4529 4530 for (i = 0; i < devip->nr_zones; i++) 4531 zbc_close_zone(devip, &devip->zstate[i]); 4532 } 4533 4534 static int resp_close_zone(struct scsi_cmnd *scp, 4535 struct sdebug_dev_info *devip) 4536 { 4537 int res = 0; 4538 u64 z_id; 4539 u8 *cmd = scp->cmnd; 4540 struct sdeb_zone_state *zsp; 4541 bool all = cmd[14] & 0x01; 4542 struct sdeb_store_info *sip = devip2sip(devip, false); 4543 rwlock_t *macc_lckp = sip ? &sip->macc_lck : &sdeb_fake_rw_lck; 4544 4545 if (!sdebug_dev_is_zoned(devip)) { 4546 mk_sense_invalid_opcode(scp); 4547 return check_condition_result; 4548 } 4549 4550 write_lock(macc_lckp); 4551 4552 if (all) { 4553 zbc_close_all(devip); 4554 goto fini; 4555 } 4556 4557 /* Close specified zone */ 4558 z_id = get_unaligned_be64(cmd + 2); 4559 if (z_id >= sdebug_capacity) { 4560 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0); 4561 res = check_condition_result; 4562 goto fini; 4563 } 4564 4565 zsp = zbc_zone(devip, z_id); 4566 if (z_id != zsp->z_start) { 4567 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0); 4568 res = check_condition_result; 4569 goto fini; 4570 } 4571 if (zbc_zone_is_conv(zsp)) { 4572 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0); 4573 res = check_condition_result; 4574 goto fini; 4575 } 4576 4577 zbc_close_zone(devip, zsp); 4578 fini: 4579 write_unlock(macc_lckp); 4580 return res; 4581 } 4582 4583 static void zbc_finish_zone(struct sdebug_dev_info *devip, 4584 struct sdeb_zone_state *zsp, bool empty) 4585 { 4586 enum sdebug_z_cond zc = zsp->z_cond; 4587 4588 if (zc == ZC4_CLOSED || zc == ZC2_IMPLICIT_OPEN || 4589 zc == ZC3_EXPLICIT_OPEN || (empty && zc == ZC1_EMPTY)) { 4590 if (zc == ZC2_IMPLICIT_OPEN || zc == ZC3_EXPLICIT_OPEN) 4591 zbc_close_zone(devip, zsp); 4592 if (zsp->z_cond == ZC4_CLOSED) 4593 devip->nr_closed--; 4594 zsp->z_wp = zsp->z_start + zsp->z_size; 4595 zsp->z_cond = ZC5_FULL; 4596 } 4597 } 4598 4599 static void zbc_finish_all(struct sdebug_dev_info *devip) 4600 { 4601 unsigned int i; 4602 4603 for (i = 0; i < devip->nr_zones; i++) 4604 zbc_finish_zone(devip, &devip->zstate[i], false); 4605 } 4606 4607 static int resp_finish_zone(struct scsi_cmnd *scp, 4608 struct sdebug_dev_info *devip) 4609 { 4610 struct sdeb_zone_state *zsp; 4611 int res = 0; 4612 u64 z_id; 4613 u8 *cmd = scp->cmnd; 4614 bool all = cmd[14] & 0x01; 4615 struct sdeb_store_info *sip = devip2sip(devip, false); 4616 rwlock_t *macc_lckp = sip ? &sip->macc_lck : &sdeb_fake_rw_lck; 4617 4618 if (!sdebug_dev_is_zoned(devip)) { 4619 mk_sense_invalid_opcode(scp); 4620 return check_condition_result; 4621 } 4622 4623 write_lock(macc_lckp); 4624 4625 if (all) { 4626 zbc_finish_all(devip); 4627 goto fini; 4628 } 4629 4630 /* Finish the specified zone */ 4631 z_id = get_unaligned_be64(cmd + 2); 4632 if (z_id >= sdebug_capacity) { 4633 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0); 4634 res = check_condition_result; 4635 goto fini; 4636 } 4637 4638 zsp = zbc_zone(devip, z_id); 4639 if (z_id != zsp->z_start) { 4640 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0); 4641 res = check_condition_result; 4642 goto fini; 4643 } 4644 if (zbc_zone_is_conv(zsp)) { 4645 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0); 4646 res = check_condition_result; 4647 goto fini; 4648 } 4649 4650 zbc_finish_zone(devip, zsp, true); 4651 fini: 4652 write_unlock(macc_lckp); 4653 return res; 4654 } 4655 4656 static void zbc_rwp_zone(struct sdebug_dev_info *devip, 4657 struct sdeb_zone_state *zsp) 4658 { 4659 enum sdebug_z_cond zc; 4660 struct sdeb_store_info *sip = devip2sip(devip, false); 4661 4662 if (zbc_zone_is_conv(zsp)) 4663 return; 4664 4665 zc = zsp->z_cond; 4666 if (zc == ZC2_IMPLICIT_OPEN || zc == ZC3_EXPLICIT_OPEN) 4667 zbc_close_zone(devip, zsp); 4668 4669 if (zsp->z_cond == ZC4_CLOSED) 4670 devip->nr_closed--; 4671 4672 if (zsp->z_wp > zsp->z_start) 4673 memset(sip->storep + zsp->z_start * sdebug_sector_size, 0, 4674 (zsp->z_wp - zsp->z_start) * sdebug_sector_size); 4675 4676 zsp->z_non_seq_resource = false; 4677 zsp->z_wp = zsp->z_start; 4678 zsp->z_cond = ZC1_EMPTY; 4679 } 4680 4681 static void zbc_rwp_all(struct sdebug_dev_info *devip) 4682 { 4683 unsigned int i; 4684 4685 for (i = 0; i < devip->nr_zones; i++) 4686 zbc_rwp_zone(devip, &devip->zstate[i]); 4687 } 4688 4689 static int resp_rwp_zone(struct scsi_cmnd *scp, struct sdebug_dev_info *devip) 4690 { 4691 struct sdeb_zone_state *zsp; 4692 int res = 0; 4693 u64 z_id; 4694 u8 *cmd = scp->cmnd; 4695 bool all = cmd[14] & 0x01; 4696 struct sdeb_store_info *sip = devip2sip(devip, false); 4697 rwlock_t *macc_lckp = sip ? &sip->macc_lck : &sdeb_fake_rw_lck; 4698 4699 if (!sdebug_dev_is_zoned(devip)) { 4700 mk_sense_invalid_opcode(scp); 4701 return check_condition_result; 4702 } 4703 4704 write_lock(macc_lckp); 4705 4706 if (all) { 4707 zbc_rwp_all(devip); 4708 goto fini; 4709 } 4710 4711 z_id = get_unaligned_be64(cmd + 2); 4712 if (z_id >= sdebug_capacity) { 4713 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0); 4714 res = check_condition_result; 4715 goto fini; 4716 } 4717 4718 zsp = zbc_zone(devip, z_id); 4719 if (z_id != zsp->z_start) { 4720 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0); 4721 res = check_condition_result; 4722 goto fini; 4723 } 4724 if (zbc_zone_is_conv(zsp)) { 4725 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0); 4726 res = check_condition_result; 4727 goto fini; 4728 } 4729 4730 zbc_rwp_zone(devip, zsp); 4731 fini: 4732 write_unlock(macc_lckp); 4733 return res; 4734 } 4735 4736 static struct sdebug_queue *get_queue(struct scsi_cmnd *cmnd) 4737 { 4738 u16 hwq; 4739 u32 tag = blk_mq_unique_tag(scsi_cmd_to_rq(cmnd)); 4740 4741 hwq = blk_mq_unique_tag_to_hwq(tag); 4742 4743 pr_debug("tag=%#x, hwq=%d\n", tag, hwq); 4744 if (WARN_ON_ONCE(hwq >= submit_queues)) 4745 hwq = 0; 4746 4747 return sdebug_q_arr + hwq; 4748 } 4749 4750 static u32 get_tag(struct scsi_cmnd *cmnd) 4751 { 4752 return blk_mq_unique_tag(scsi_cmd_to_rq(cmnd)); 4753 } 4754 4755 /* Queued (deferred) command completions converge here. */ 4756 static void sdebug_q_cmd_complete(struct sdebug_defer *sd_dp) 4757 { 4758 bool aborted = sd_dp->aborted; 4759 int qc_idx; 4760 int retiring = 0; 4761 unsigned long iflags; 4762 struct sdebug_queue *sqp; 4763 struct sdebug_queued_cmd *sqcp; 4764 struct scsi_cmnd *scp; 4765 struct sdebug_dev_info *devip; 4766 4767 if (unlikely(aborted)) 4768 sd_dp->aborted = false; 4769 qc_idx = sd_dp->qc_idx; 4770 sqp = sdebug_q_arr + sd_dp->sqa_idx; 4771 if (sdebug_statistics) { 4772 atomic_inc(&sdebug_completions); 4773 if (raw_smp_processor_id() != sd_dp->issuing_cpu) 4774 atomic_inc(&sdebug_miss_cpus); 4775 } 4776 if (unlikely((qc_idx < 0) || (qc_idx >= SDEBUG_CANQUEUE))) { 4777 pr_err("wild qc_idx=%d\n", qc_idx); 4778 return; 4779 } 4780 spin_lock_irqsave(&sqp->qc_lock, iflags); 4781 sd_dp->defer_t = SDEB_DEFER_NONE; 4782 sqcp = &sqp->qc_arr[qc_idx]; 4783 scp = sqcp->a_cmnd; 4784 if (unlikely(scp == NULL)) { 4785 spin_unlock_irqrestore(&sqp->qc_lock, iflags); 4786 pr_err("scp is NULL, sqa_idx=%d, qc_idx=%d, hc_idx=%d\n", 4787 sd_dp->sqa_idx, qc_idx, sd_dp->hc_idx); 4788 return; 4789 } 4790 devip = (struct sdebug_dev_info *)scp->device->hostdata; 4791 if (likely(devip)) 4792 atomic_dec(&devip->num_in_q); 4793 else 4794 pr_err("devip=NULL\n"); 4795 if (unlikely(atomic_read(&retired_max_queue) > 0)) 4796 retiring = 1; 4797 4798 sqcp->a_cmnd = NULL; 4799 if (unlikely(!test_and_clear_bit(qc_idx, sqp->in_use_bm))) { 4800 spin_unlock_irqrestore(&sqp->qc_lock, iflags); 4801 pr_err("Unexpected completion\n"); 4802 return; 4803 } 4804 4805 if (unlikely(retiring)) { /* user has reduced max_queue */ 4806 int k, retval; 4807 4808 retval = atomic_read(&retired_max_queue); 4809 if (qc_idx >= retval) { 4810 spin_unlock_irqrestore(&sqp->qc_lock, iflags); 4811 pr_err("index %d too large\n", retval); 4812 return; 4813 } 4814 k = find_last_bit(sqp->in_use_bm, retval); 4815 if ((k < sdebug_max_queue) || (k == retval)) 4816 atomic_set(&retired_max_queue, 0); 4817 else 4818 atomic_set(&retired_max_queue, k + 1); 4819 } 4820 spin_unlock_irqrestore(&sqp->qc_lock, iflags); 4821 if (unlikely(aborted)) { 4822 if (sdebug_verbose) 4823 pr_info("bypassing scsi_done() due to aborted cmd\n"); 4824 return; 4825 } 4826 scsi_done(scp); /* callback to mid level */ 4827 } 4828 4829 /* When high resolution timer goes off this function is called. */ 4830 static enum hrtimer_restart sdebug_q_cmd_hrt_complete(struct hrtimer *timer) 4831 { 4832 struct sdebug_defer *sd_dp = container_of(timer, struct sdebug_defer, 4833 hrt); 4834 sdebug_q_cmd_complete(sd_dp); 4835 return HRTIMER_NORESTART; 4836 } 4837 4838 /* When work queue schedules work, it calls this function. */ 4839 static void sdebug_q_cmd_wq_complete(struct work_struct *work) 4840 { 4841 struct sdebug_defer *sd_dp = container_of(work, struct sdebug_defer, 4842 ew.work); 4843 sdebug_q_cmd_complete(sd_dp); 4844 } 4845 4846 static bool got_shared_uuid; 4847 static uuid_t shared_uuid; 4848 4849 static int sdebug_device_create_zones(struct sdebug_dev_info *devip) 4850 { 4851 struct sdeb_zone_state *zsp; 4852 sector_t capacity = get_sdebug_capacity(); 4853 sector_t zstart = 0; 4854 unsigned int i; 4855 4856 /* 4857 * Set the zone size: if sdeb_zbc_zone_size_mb is not set, figure out 4858 * a zone size allowing for at least 4 zones on the device. Otherwise, 4859 * use the specified zone size checking that at least 2 zones can be 4860 * created for the device. 4861 */ 4862 if (!sdeb_zbc_zone_size_mb) { 4863 devip->zsize = (DEF_ZBC_ZONE_SIZE_MB * SZ_1M) 4864 >> ilog2(sdebug_sector_size); 4865 while (capacity < devip->zsize << 2 && devip->zsize >= 2) 4866 devip->zsize >>= 1; 4867 if (devip->zsize < 2) { 4868 pr_err("Device capacity too small\n"); 4869 return -EINVAL; 4870 } 4871 } else { 4872 if (!is_power_of_2(sdeb_zbc_zone_size_mb)) { 4873 pr_err("Zone size is not a power of 2\n"); 4874 return -EINVAL; 4875 } 4876 devip->zsize = (sdeb_zbc_zone_size_mb * SZ_1M) 4877 >> ilog2(sdebug_sector_size); 4878 if (devip->zsize >= capacity) { 4879 pr_err("Zone size too large for device capacity\n"); 4880 return -EINVAL; 4881 } 4882 } 4883 4884 devip->zsize_shift = ilog2(devip->zsize); 4885 devip->nr_zones = (capacity + devip->zsize - 1) >> devip->zsize_shift; 4886 4887 if (sdeb_zbc_nr_conv >= devip->nr_zones) { 4888 pr_err("Number of conventional zones too large\n"); 4889 return -EINVAL; 4890 } 4891 devip->nr_conv_zones = sdeb_zbc_nr_conv; 4892 4893 if (devip->zmodel == BLK_ZONED_HM) { 4894 /* zbc_max_open_zones can be 0, meaning "not reported" */ 4895 if (sdeb_zbc_max_open >= devip->nr_zones - 1) 4896 devip->max_open = (devip->nr_zones - 1) / 2; 4897 else 4898 devip->max_open = sdeb_zbc_max_open; 4899 } 4900 4901 devip->zstate = kcalloc(devip->nr_zones, 4902 sizeof(struct sdeb_zone_state), GFP_KERNEL); 4903 if (!devip->zstate) 4904 return -ENOMEM; 4905 4906 for (i = 0; i < devip->nr_zones; i++) { 4907 zsp = &devip->zstate[i]; 4908 4909 zsp->z_start = zstart; 4910 4911 if (i < devip->nr_conv_zones) { 4912 zsp->z_type = ZBC_ZONE_TYPE_CNV; 4913 zsp->z_cond = ZBC_NOT_WRITE_POINTER; 4914 zsp->z_wp = (sector_t)-1; 4915 } else { 4916 if (devip->zmodel == BLK_ZONED_HM) 4917 zsp->z_type = ZBC_ZONE_TYPE_SWR; 4918 else 4919 zsp->z_type = ZBC_ZONE_TYPE_SWP; 4920 zsp->z_cond = ZC1_EMPTY; 4921 zsp->z_wp = zsp->z_start; 4922 } 4923 4924 if (zsp->z_start + devip->zsize < capacity) 4925 zsp->z_size = devip->zsize; 4926 else 4927 zsp->z_size = capacity - zsp->z_start; 4928 4929 zstart += zsp->z_size; 4930 } 4931 4932 return 0; 4933 } 4934 4935 static struct sdebug_dev_info *sdebug_device_create( 4936 struct sdebug_host_info *sdbg_host, gfp_t flags) 4937 { 4938 struct sdebug_dev_info *devip; 4939 4940 devip = kzalloc(sizeof(*devip), flags); 4941 if (devip) { 4942 if (sdebug_uuid_ctl == 1) 4943 uuid_gen(&devip->lu_name); 4944 else if (sdebug_uuid_ctl == 2) { 4945 if (got_shared_uuid) 4946 devip->lu_name = shared_uuid; 4947 else { 4948 uuid_gen(&shared_uuid); 4949 got_shared_uuid = true; 4950 devip->lu_name = shared_uuid; 4951 } 4952 } 4953 devip->sdbg_host = sdbg_host; 4954 if (sdeb_zbc_in_use) { 4955 devip->zmodel = sdeb_zbc_model; 4956 if (sdebug_device_create_zones(devip)) { 4957 kfree(devip); 4958 return NULL; 4959 } 4960 } else { 4961 devip->zmodel = BLK_ZONED_NONE; 4962 } 4963 devip->sdbg_host = sdbg_host; 4964 devip->create_ts = ktime_get_boottime(); 4965 atomic_set(&devip->stopped, (sdeb_tur_ms_to_ready > 0 ? 2 : 0)); 4966 list_add_tail(&devip->dev_list, &sdbg_host->dev_info_list); 4967 } 4968 return devip; 4969 } 4970 4971 static struct sdebug_dev_info *find_build_dev_info(struct scsi_device *sdev) 4972 { 4973 struct sdebug_host_info *sdbg_host; 4974 struct sdebug_dev_info *open_devip = NULL; 4975 struct sdebug_dev_info *devip; 4976 4977 sdbg_host = *(struct sdebug_host_info **)shost_priv(sdev->host); 4978 if (!sdbg_host) { 4979 pr_err("Host info NULL\n"); 4980 return NULL; 4981 } 4982 4983 list_for_each_entry(devip, &sdbg_host->dev_info_list, dev_list) { 4984 if ((devip->used) && (devip->channel == sdev->channel) && 4985 (devip->target == sdev->id) && 4986 (devip->lun == sdev->lun)) 4987 return devip; 4988 else { 4989 if ((!devip->used) && (!open_devip)) 4990 open_devip = devip; 4991 } 4992 } 4993 if (!open_devip) { /* try and make a new one */ 4994 open_devip = sdebug_device_create(sdbg_host, GFP_ATOMIC); 4995 if (!open_devip) { 4996 pr_err("out of memory at line %d\n", __LINE__); 4997 return NULL; 4998 } 4999 } 5000 5001 open_devip->channel = sdev->channel; 5002 open_devip->target = sdev->id; 5003 open_devip->lun = sdev->lun; 5004 open_devip->sdbg_host = sdbg_host; 5005 atomic_set(&open_devip->num_in_q, 0); 5006 set_bit(SDEBUG_UA_POR, open_devip->uas_bm); 5007 open_devip->used = true; 5008 return open_devip; 5009 } 5010 5011 static int scsi_debug_slave_alloc(struct scsi_device *sdp) 5012 { 5013 if (sdebug_verbose) 5014 pr_info("slave_alloc <%u %u %u %llu>\n", 5015 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun); 5016 return 0; 5017 } 5018 5019 static int scsi_debug_slave_configure(struct scsi_device *sdp) 5020 { 5021 struct sdebug_dev_info *devip = 5022 (struct sdebug_dev_info *)sdp->hostdata; 5023 5024 if (sdebug_verbose) 5025 pr_info("slave_configure <%u %u %u %llu>\n", 5026 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun); 5027 if (sdp->host->max_cmd_len != SDEBUG_MAX_CMD_LEN) 5028 sdp->host->max_cmd_len = SDEBUG_MAX_CMD_LEN; 5029 if (devip == NULL) { 5030 devip = find_build_dev_info(sdp); 5031 if (devip == NULL) 5032 return 1; /* no resources, will be marked offline */ 5033 } 5034 sdp->hostdata = devip; 5035 if (sdebug_no_uld) 5036 sdp->no_uld_attach = 1; 5037 config_cdb_len(sdp); 5038 return 0; 5039 } 5040 5041 static void scsi_debug_slave_destroy(struct scsi_device *sdp) 5042 { 5043 struct sdebug_dev_info *devip = 5044 (struct sdebug_dev_info *)sdp->hostdata; 5045 5046 if (sdebug_verbose) 5047 pr_info("slave_destroy <%u %u %u %llu>\n", 5048 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun); 5049 if (devip) { 5050 /* make this slot available for re-use */ 5051 devip->used = false; 5052 sdp->hostdata = NULL; 5053 } 5054 } 5055 5056 static void stop_qc_helper(struct sdebug_defer *sd_dp, 5057 enum sdeb_defer_type defer_t) 5058 { 5059 if (!sd_dp) 5060 return; 5061 if (defer_t == SDEB_DEFER_HRT) 5062 hrtimer_cancel(&sd_dp->hrt); 5063 else if (defer_t == SDEB_DEFER_WQ) 5064 cancel_work_sync(&sd_dp->ew.work); 5065 } 5066 5067 /* If @cmnd found deletes its timer or work queue and returns true; else 5068 returns false */ 5069 static bool stop_queued_cmnd(struct scsi_cmnd *cmnd) 5070 { 5071 unsigned long iflags; 5072 int j, k, qmax, r_qmax; 5073 enum sdeb_defer_type l_defer_t; 5074 struct sdebug_queue *sqp; 5075 struct sdebug_queued_cmd *sqcp; 5076 struct sdebug_dev_info *devip; 5077 struct sdebug_defer *sd_dp; 5078 5079 for (j = 0, sqp = sdebug_q_arr; j < submit_queues; ++j, ++sqp) { 5080 spin_lock_irqsave(&sqp->qc_lock, iflags); 5081 qmax = sdebug_max_queue; 5082 r_qmax = atomic_read(&retired_max_queue); 5083 if (r_qmax > qmax) 5084 qmax = r_qmax; 5085 for (k = 0; k < qmax; ++k) { 5086 if (test_bit(k, sqp->in_use_bm)) { 5087 sqcp = &sqp->qc_arr[k]; 5088 if (cmnd != sqcp->a_cmnd) 5089 continue; 5090 /* found */ 5091 devip = (struct sdebug_dev_info *) 5092 cmnd->device->hostdata; 5093 if (devip) 5094 atomic_dec(&devip->num_in_q); 5095 sqcp->a_cmnd = NULL; 5096 sd_dp = sqcp->sd_dp; 5097 if (sd_dp) { 5098 l_defer_t = sd_dp->defer_t; 5099 sd_dp->defer_t = SDEB_DEFER_NONE; 5100 } else 5101 l_defer_t = SDEB_DEFER_NONE; 5102 spin_unlock_irqrestore(&sqp->qc_lock, iflags); 5103 stop_qc_helper(sd_dp, l_defer_t); 5104 clear_bit(k, sqp->in_use_bm); 5105 return true; 5106 } 5107 } 5108 spin_unlock_irqrestore(&sqp->qc_lock, iflags); 5109 } 5110 return false; 5111 } 5112 5113 /* Deletes (stops) timers or work queues of all queued commands */ 5114 static void stop_all_queued(void) 5115 { 5116 unsigned long iflags; 5117 int j, k; 5118 enum sdeb_defer_type l_defer_t; 5119 struct sdebug_queue *sqp; 5120 struct sdebug_queued_cmd *sqcp; 5121 struct sdebug_dev_info *devip; 5122 struct sdebug_defer *sd_dp; 5123 5124 for (j = 0, sqp = sdebug_q_arr; j < submit_queues; ++j, ++sqp) { 5125 spin_lock_irqsave(&sqp->qc_lock, iflags); 5126 for (k = 0; k < SDEBUG_CANQUEUE; ++k) { 5127 if (test_bit(k, sqp->in_use_bm)) { 5128 sqcp = &sqp->qc_arr[k]; 5129 if (sqcp->a_cmnd == NULL) 5130 continue; 5131 devip = (struct sdebug_dev_info *) 5132 sqcp->a_cmnd->device->hostdata; 5133 if (devip) 5134 atomic_dec(&devip->num_in_q); 5135 sqcp->a_cmnd = NULL; 5136 sd_dp = sqcp->sd_dp; 5137 if (sd_dp) { 5138 l_defer_t = sd_dp->defer_t; 5139 sd_dp->defer_t = SDEB_DEFER_NONE; 5140 } else 5141 l_defer_t = SDEB_DEFER_NONE; 5142 spin_unlock_irqrestore(&sqp->qc_lock, iflags); 5143 stop_qc_helper(sd_dp, l_defer_t); 5144 clear_bit(k, sqp->in_use_bm); 5145 spin_lock_irqsave(&sqp->qc_lock, iflags); 5146 } 5147 } 5148 spin_unlock_irqrestore(&sqp->qc_lock, iflags); 5149 } 5150 } 5151 5152 /* Free queued command memory on heap */ 5153 static void free_all_queued(void) 5154 { 5155 int j, k; 5156 struct sdebug_queue *sqp; 5157 struct sdebug_queued_cmd *sqcp; 5158 5159 for (j = 0, sqp = sdebug_q_arr; j < submit_queues; ++j, ++sqp) { 5160 for (k = 0; k < SDEBUG_CANQUEUE; ++k) { 5161 sqcp = &sqp->qc_arr[k]; 5162 kfree(sqcp->sd_dp); 5163 sqcp->sd_dp = NULL; 5164 } 5165 } 5166 } 5167 5168 static int scsi_debug_abort(struct scsi_cmnd *SCpnt) 5169 { 5170 bool ok; 5171 5172 ++num_aborts; 5173 if (SCpnt) { 5174 ok = stop_queued_cmnd(SCpnt); 5175 if (SCpnt->device && (SDEBUG_OPT_ALL_NOISE & sdebug_opts)) 5176 sdev_printk(KERN_INFO, SCpnt->device, 5177 "%s: command%s found\n", __func__, 5178 ok ? "" : " not"); 5179 } 5180 return SUCCESS; 5181 } 5182 5183 static int scsi_debug_device_reset(struct scsi_cmnd *SCpnt) 5184 { 5185 ++num_dev_resets; 5186 if (SCpnt && SCpnt->device) { 5187 struct scsi_device *sdp = SCpnt->device; 5188 struct sdebug_dev_info *devip = 5189 (struct sdebug_dev_info *)sdp->hostdata; 5190 5191 if (SDEBUG_OPT_ALL_NOISE & sdebug_opts) 5192 sdev_printk(KERN_INFO, sdp, "%s\n", __func__); 5193 if (devip) 5194 set_bit(SDEBUG_UA_POR, devip->uas_bm); 5195 } 5196 return SUCCESS; 5197 } 5198 5199 static int scsi_debug_target_reset(struct scsi_cmnd *SCpnt) 5200 { 5201 struct sdebug_host_info *sdbg_host; 5202 struct sdebug_dev_info *devip; 5203 struct scsi_device *sdp; 5204 struct Scsi_Host *hp; 5205 int k = 0; 5206 5207 ++num_target_resets; 5208 if (!SCpnt) 5209 goto lie; 5210 sdp = SCpnt->device; 5211 if (!sdp) 5212 goto lie; 5213 if (SDEBUG_OPT_ALL_NOISE & sdebug_opts) 5214 sdev_printk(KERN_INFO, sdp, "%s\n", __func__); 5215 hp = sdp->host; 5216 if (!hp) 5217 goto lie; 5218 sdbg_host = *(struct sdebug_host_info **)shost_priv(hp); 5219 if (sdbg_host) { 5220 list_for_each_entry(devip, 5221 &sdbg_host->dev_info_list, 5222 dev_list) 5223 if (devip->target == sdp->id) { 5224 set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm); 5225 ++k; 5226 } 5227 } 5228 if (SDEBUG_OPT_RESET_NOISE & sdebug_opts) 5229 sdev_printk(KERN_INFO, sdp, 5230 "%s: %d device(s) found in target\n", __func__, k); 5231 lie: 5232 return SUCCESS; 5233 } 5234 5235 static int scsi_debug_bus_reset(struct scsi_cmnd *SCpnt) 5236 { 5237 struct sdebug_host_info *sdbg_host; 5238 struct sdebug_dev_info *devip; 5239 struct scsi_device *sdp; 5240 struct Scsi_Host *hp; 5241 int k = 0; 5242 5243 ++num_bus_resets; 5244 if (!(SCpnt && SCpnt->device)) 5245 goto lie; 5246 sdp = SCpnt->device; 5247 if (SDEBUG_OPT_ALL_NOISE & sdebug_opts) 5248 sdev_printk(KERN_INFO, sdp, "%s\n", __func__); 5249 hp = sdp->host; 5250 if (hp) { 5251 sdbg_host = *(struct sdebug_host_info **)shost_priv(hp); 5252 if (sdbg_host) { 5253 list_for_each_entry(devip, 5254 &sdbg_host->dev_info_list, 5255 dev_list) { 5256 set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm); 5257 ++k; 5258 } 5259 } 5260 } 5261 if (SDEBUG_OPT_RESET_NOISE & sdebug_opts) 5262 sdev_printk(KERN_INFO, sdp, 5263 "%s: %d device(s) found in host\n", __func__, k); 5264 lie: 5265 return SUCCESS; 5266 } 5267 5268 static int scsi_debug_host_reset(struct scsi_cmnd *SCpnt) 5269 { 5270 struct sdebug_host_info *sdbg_host; 5271 struct sdebug_dev_info *devip; 5272 int k = 0; 5273 5274 ++num_host_resets; 5275 if ((SCpnt->device) && (SDEBUG_OPT_ALL_NOISE & sdebug_opts)) 5276 sdev_printk(KERN_INFO, SCpnt->device, "%s\n", __func__); 5277 spin_lock(&sdebug_host_list_lock); 5278 list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) { 5279 list_for_each_entry(devip, &sdbg_host->dev_info_list, 5280 dev_list) { 5281 set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm); 5282 ++k; 5283 } 5284 } 5285 spin_unlock(&sdebug_host_list_lock); 5286 stop_all_queued(); 5287 if (SDEBUG_OPT_RESET_NOISE & sdebug_opts) 5288 sdev_printk(KERN_INFO, SCpnt->device, 5289 "%s: %d device(s) found\n", __func__, k); 5290 return SUCCESS; 5291 } 5292 5293 static void sdebug_build_parts(unsigned char *ramp, unsigned long store_size) 5294 { 5295 struct msdos_partition *pp; 5296 int starts[SDEBUG_MAX_PARTS + 2], max_part_secs; 5297 int sectors_per_part, num_sectors, k; 5298 int heads_by_sects, start_sec, end_sec; 5299 5300 /* assume partition table already zeroed */ 5301 if ((sdebug_num_parts < 1) || (store_size < 1048576)) 5302 return; 5303 if (sdebug_num_parts > SDEBUG_MAX_PARTS) { 5304 sdebug_num_parts = SDEBUG_MAX_PARTS; 5305 pr_warn("reducing partitions to %d\n", SDEBUG_MAX_PARTS); 5306 } 5307 num_sectors = (int)get_sdebug_capacity(); 5308 sectors_per_part = (num_sectors - sdebug_sectors_per) 5309 / sdebug_num_parts; 5310 heads_by_sects = sdebug_heads * sdebug_sectors_per; 5311 starts[0] = sdebug_sectors_per; 5312 max_part_secs = sectors_per_part; 5313 for (k = 1; k < sdebug_num_parts; ++k) { 5314 starts[k] = ((k * sectors_per_part) / heads_by_sects) 5315 * heads_by_sects; 5316 if (starts[k] - starts[k - 1] < max_part_secs) 5317 max_part_secs = starts[k] - starts[k - 1]; 5318 } 5319 starts[sdebug_num_parts] = num_sectors; 5320 starts[sdebug_num_parts + 1] = 0; 5321 5322 ramp[510] = 0x55; /* magic partition markings */ 5323 ramp[511] = 0xAA; 5324 pp = (struct msdos_partition *)(ramp + 0x1be); 5325 for (k = 0; starts[k + 1]; ++k, ++pp) { 5326 start_sec = starts[k]; 5327 end_sec = starts[k] + max_part_secs - 1; 5328 pp->boot_ind = 0; 5329 5330 pp->cyl = start_sec / heads_by_sects; 5331 pp->head = (start_sec - (pp->cyl * heads_by_sects)) 5332 / sdebug_sectors_per; 5333 pp->sector = (start_sec % sdebug_sectors_per) + 1; 5334 5335 pp->end_cyl = end_sec / heads_by_sects; 5336 pp->end_head = (end_sec - (pp->end_cyl * heads_by_sects)) 5337 / sdebug_sectors_per; 5338 pp->end_sector = (end_sec % sdebug_sectors_per) + 1; 5339 5340 pp->start_sect = cpu_to_le32(start_sec); 5341 pp->nr_sects = cpu_to_le32(end_sec - start_sec + 1); 5342 pp->sys_ind = 0x83; /* plain Linux partition */ 5343 } 5344 } 5345 5346 static void block_unblock_all_queues(bool block) 5347 { 5348 int j; 5349 struct sdebug_queue *sqp; 5350 5351 for (j = 0, sqp = sdebug_q_arr; j < submit_queues; ++j, ++sqp) 5352 atomic_set(&sqp->blocked, (int)block); 5353 } 5354 5355 /* Adjust (by rounding down) the sdebug_cmnd_count so abs(every_nth)-1 5356 * commands will be processed normally before triggers occur. 5357 */ 5358 static void tweak_cmnd_count(void) 5359 { 5360 int count, modulo; 5361 5362 modulo = abs(sdebug_every_nth); 5363 if (modulo < 2) 5364 return; 5365 block_unblock_all_queues(true); 5366 count = atomic_read(&sdebug_cmnd_count); 5367 atomic_set(&sdebug_cmnd_count, (count / modulo) * modulo); 5368 block_unblock_all_queues(false); 5369 } 5370 5371 static void clear_queue_stats(void) 5372 { 5373 atomic_set(&sdebug_cmnd_count, 0); 5374 atomic_set(&sdebug_completions, 0); 5375 atomic_set(&sdebug_miss_cpus, 0); 5376 atomic_set(&sdebug_a_tsf, 0); 5377 } 5378 5379 static bool inject_on_this_cmd(void) 5380 { 5381 if (sdebug_every_nth == 0) 5382 return false; 5383 return (atomic_read(&sdebug_cmnd_count) % abs(sdebug_every_nth)) == 0; 5384 } 5385 5386 #define INCLUSIVE_TIMING_MAX_NS 1000000 /* 1 millisecond */ 5387 5388 /* Complete the processing of the thread that queued a SCSI command to this 5389 * driver. It either completes the command by calling cmnd_done() or 5390 * schedules a hr timer or work queue then returns 0. Returns 5391 * SCSI_MLQUEUE_HOST_BUSY if temporarily out of resources. 5392 */ 5393 static int schedule_resp(struct scsi_cmnd *cmnd, struct sdebug_dev_info *devip, 5394 int scsi_result, 5395 int (*pfp)(struct scsi_cmnd *, 5396 struct sdebug_dev_info *), 5397 int delta_jiff, int ndelay) 5398 { 5399 bool new_sd_dp; 5400 bool inject = false; 5401 bool polled = scsi_cmd_to_rq(cmnd)->cmd_flags & REQ_POLLED; 5402 int k, num_in_q, qdepth; 5403 unsigned long iflags; 5404 u64 ns_from_boot = 0; 5405 struct sdebug_queue *sqp; 5406 struct sdebug_queued_cmd *sqcp; 5407 struct scsi_device *sdp; 5408 struct sdebug_defer *sd_dp; 5409 5410 if (unlikely(devip == NULL)) { 5411 if (scsi_result == 0) 5412 scsi_result = DID_NO_CONNECT << 16; 5413 goto respond_in_thread; 5414 } 5415 sdp = cmnd->device; 5416 5417 if (delta_jiff == 0) 5418 goto respond_in_thread; 5419 5420 sqp = get_queue(cmnd); 5421 spin_lock_irqsave(&sqp->qc_lock, iflags); 5422 if (unlikely(atomic_read(&sqp->blocked))) { 5423 spin_unlock_irqrestore(&sqp->qc_lock, iflags); 5424 return SCSI_MLQUEUE_HOST_BUSY; 5425 } 5426 num_in_q = atomic_read(&devip->num_in_q); 5427 qdepth = cmnd->device->queue_depth; 5428 if (unlikely((qdepth > 0) && (num_in_q >= qdepth))) { 5429 if (scsi_result) { 5430 spin_unlock_irqrestore(&sqp->qc_lock, iflags); 5431 goto respond_in_thread; 5432 } else 5433 scsi_result = device_qfull_result; 5434 } else if (unlikely(sdebug_every_nth && 5435 (SDEBUG_OPT_RARE_TSF & sdebug_opts) && 5436 (scsi_result == 0))) { 5437 if ((num_in_q == (qdepth - 1)) && 5438 (atomic_inc_return(&sdebug_a_tsf) >= 5439 abs(sdebug_every_nth))) { 5440 atomic_set(&sdebug_a_tsf, 0); 5441 inject = true; 5442 scsi_result = device_qfull_result; 5443 } 5444 } 5445 5446 k = find_first_zero_bit(sqp->in_use_bm, sdebug_max_queue); 5447 if (unlikely(k >= sdebug_max_queue)) { 5448 spin_unlock_irqrestore(&sqp->qc_lock, iflags); 5449 if (scsi_result) 5450 goto respond_in_thread; 5451 else if (SDEBUG_OPT_ALL_TSF & sdebug_opts) 5452 scsi_result = device_qfull_result; 5453 if (SDEBUG_OPT_Q_NOISE & sdebug_opts) 5454 sdev_printk(KERN_INFO, sdp, 5455 "%s: max_queue=%d exceeded, %s\n", 5456 __func__, sdebug_max_queue, 5457 (scsi_result ? "status: TASK SET FULL" : 5458 "report: host busy")); 5459 if (scsi_result) 5460 goto respond_in_thread; 5461 else 5462 return SCSI_MLQUEUE_HOST_BUSY; 5463 } 5464 set_bit(k, sqp->in_use_bm); 5465 atomic_inc(&devip->num_in_q); 5466 sqcp = &sqp->qc_arr[k]; 5467 sqcp->a_cmnd = cmnd; 5468 cmnd->host_scribble = (unsigned char *)sqcp; 5469 sd_dp = sqcp->sd_dp; 5470 spin_unlock_irqrestore(&sqp->qc_lock, iflags); 5471 5472 if (!sd_dp) { 5473 sd_dp = kzalloc(sizeof(*sd_dp), GFP_ATOMIC); 5474 if (!sd_dp) { 5475 atomic_dec(&devip->num_in_q); 5476 clear_bit(k, sqp->in_use_bm); 5477 return SCSI_MLQUEUE_HOST_BUSY; 5478 } 5479 new_sd_dp = true; 5480 } else { 5481 new_sd_dp = false; 5482 } 5483 5484 /* Set the hostwide tag */ 5485 if (sdebug_host_max_queue) 5486 sd_dp->hc_idx = get_tag(cmnd); 5487 5488 if (polled) 5489 ns_from_boot = ktime_get_boottime_ns(); 5490 5491 /* one of the resp_*() response functions is called here */ 5492 cmnd->result = pfp ? pfp(cmnd, devip) : 0; 5493 if (cmnd->result & SDEG_RES_IMMED_MASK) { 5494 cmnd->result &= ~SDEG_RES_IMMED_MASK; 5495 delta_jiff = ndelay = 0; 5496 } 5497 if (cmnd->result == 0 && scsi_result != 0) 5498 cmnd->result = scsi_result; 5499 if (cmnd->result == 0 && unlikely(sdebug_opts & SDEBUG_OPT_TRANSPORT_ERR)) { 5500 if (atomic_read(&sdeb_inject_pending)) { 5501 mk_sense_buffer(cmnd, ABORTED_COMMAND, TRANSPORT_PROBLEM, ACK_NAK_TO); 5502 atomic_set(&sdeb_inject_pending, 0); 5503 cmnd->result = check_condition_result; 5504 } 5505 } 5506 5507 if (unlikely(sdebug_verbose && cmnd->result)) 5508 sdev_printk(KERN_INFO, sdp, "%s: non-zero result=0x%x\n", 5509 __func__, cmnd->result); 5510 5511 if (delta_jiff > 0 || ndelay > 0) { 5512 ktime_t kt; 5513 5514 if (delta_jiff > 0) { 5515 u64 ns = jiffies_to_nsecs(delta_jiff); 5516 5517 if (sdebug_random && ns < U32_MAX) { 5518 ns = prandom_u32_max((u32)ns); 5519 } else if (sdebug_random) { 5520 ns >>= 12; /* scale to 4 usec precision */ 5521 if (ns < U32_MAX) /* over 4 hours max */ 5522 ns = prandom_u32_max((u32)ns); 5523 ns <<= 12; 5524 } 5525 kt = ns_to_ktime(ns); 5526 } else { /* ndelay has a 4.2 second max */ 5527 kt = sdebug_random ? prandom_u32_max((u32)ndelay) : 5528 (u32)ndelay; 5529 if (ndelay < INCLUSIVE_TIMING_MAX_NS) { 5530 u64 d = ktime_get_boottime_ns() - ns_from_boot; 5531 5532 if (kt <= d) { /* elapsed duration >= kt */ 5533 spin_lock_irqsave(&sqp->qc_lock, iflags); 5534 sqcp->a_cmnd = NULL; 5535 atomic_dec(&devip->num_in_q); 5536 clear_bit(k, sqp->in_use_bm); 5537 spin_unlock_irqrestore(&sqp->qc_lock, iflags); 5538 if (new_sd_dp) 5539 kfree(sd_dp); 5540 /* call scsi_done() from this thread */ 5541 scsi_done(cmnd); 5542 return 0; 5543 } 5544 /* otherwise reduce kt by elapsed time */ 5545 kt -= d; 5546 } 5547 } 5548 if (polled) { 5549 sd_dp->cmpl_ts = ktime_add(ns_to_ktime(ns_from_boot), kt); 5550 spin_lock_irqsave(&sqp->qc_lock, iflags); 5551 if (!sd_dp->init_poll) { 5552 sd_dp->init_poll = true; 5553 sqcp->sd_dp = sd_dp; 5554 sd_dp->sqa_idx = sqp - sdebug_q_arr; 5555 sd_dp->qc_idx = k; 5556 } 5557 sd_dp->defer_t = SDEB_DEFER_POLL; 5558 spin_unlock_irqrestore(&sqp->qc_lock, iflags); 5559 } else { 5560 if (!sd_dp->init_hrt) { 5561 sd_dp->init_hrt = true; 5562 sqcp->sd_dp = sd_dp; 5563 hrtimer_init(&sd_dp->hrt, CLOCK_MONOTONIC, 5564 HRTIMER_MODE_REL_PINNED); 5565 sd_dp->hrt.function = sdebug_q_cmd_hrt_complete; 5566 sd_dp->sqa_idx = sqp - sdebug_q_arr; 5567 sd_dp->qc_idx = k; 5568 } 5569 sd_dp->defer_t = SDEB_DEFER_HRT; 5570 /* schedule the invocation of scsi_done() for a later time */ 5571 hrtimer_start(&sd_dp->hrt, kt, HRTIMER_MODE_REL_PINNED); 5572 } 5573 if (sdebug_statistics) 5574 sd_dp->issuing_cpu = raw_smp_processor_id(); 5575 } else { /* jdelay < 0, use work queue */ 5576 if (unlikely((sdebug_opts & SDEBUG_OPT_CMD_ABORT) && 5577 atomic_read(&sdeb_inject_pending))) 5578 sd_dp->aborted = true; 5579 if (polled) { 5580 sd_dp->cmpl_ts = ns_to_ktime(ns_from_boot); 5581 spin_lock_irqsave(&sqp->qc_lock, iflags); 5582 if (!sd_dp->init_poll) { 5583 sd_dp->init_poll = true; 5584 sqcp->sd_dp = sd_dp; 5585 sd_dp->sqa_idx = sqp - sdebug_q_arr; 5586 sd_dp->qc_idx = k; 5587 } 5588 sd_dp->defer_t = SDEB_DEFER_POLL; 5589 spin_unlock_irqrestore(&sqp->qc_lock, iflags); 5590 } else { 5591 if (!sd_dp->init_wq) { 5592 sd_dp->init_wq = true; 5593 sqcp->sd_dp = sd_dp; 5594 sd_dp->sqa_idx = sqp - sdebug_q_arr; 5595 sd_dp->qc_idx = k; 5596 INIT_WORK(&sd_dp->ew.work, sdebug_q_cmd_wq_complete); 5597 } 5598 sd_dp->defer_t = SDEB_DEFER_WQ; 5599 schedule_work(&sd_dp->ew.work); 5600 } 5601 if (sdebug_statistics) 5602 sd_dp->issuing_cpu = raw_smp_processor_id(); 5603 if (unlikely(sd_dp->aborted)) { 5604 sdev_printk(KERN_INFO, sdp, "abort request tag %d\n", 5605 scsi_cmd_to_rq(cmnd)->tag); 5606 blk_abort_request(scsi_cmd_to_rq(cmnd)); 5607 atomic_set(&sdeb_inject_pending, 0); 5608 sd_dp->aborted = false; 5609 } 5610 } 5611 if (unlikely((SDEBUG_OPT_Q_NOISE & sdebug_opts) && scsi_result == device_qfull_result)) 5612 sdev_printk(KERN_INFO, sdp, "%s: num_in_q=%d +1, %s%s\n", __func__, 5613 num_in_q, (inject ? "<inject> " : ""), "status: TASK SET FULL"); 5614 return 0; 5615 5616 respond_in_thread: /* call back to mid-layer using invocation thread */ 5617 cmnd->result = pfp != NULL ? pfp(cmnd, devip) : 0; 5618 cmnd->result &= ~SDEG_RES_IMMED_MASK; 5619 if (cmnd->result == 0 && scsi_result != 0) 5620 cmnd->result = scsi_result; 5621 scsi_done(cmnd); 5622 return 0; 5623 } 5624 5625 /* Note: The following macros create attribute files in the 5626 /sys/module/scsi_debug/parameters directory. Unfortunately this 5627 driver is unaware of a change and cannot trigger auxiliary actions 5628 as it can when the corresponding attribute in the 5629 /sys/bus/pseudo/drivers/scsi_debug directory is changed. 5630 */ 5631 module_param_named(add_host, sdebug_add_host, int, S_IRUGO | S_IWUSR); 5632 module_param_named(ato, sdebug_ato, int, S_IRUGO); 5633 module_param_named(cdb_len, sdebug_cdb_len, int, 0644); 5634 module_param_named(clustering, sdebug_clustering, bool, S_IRUGO | S_IWUSR); 5635 module_param_named(delay, sdebug_jdelay, int, S_IRUGO | S_IWUSR); 5636 module_param_named(dev_size_mb, sdebug_dev_size_mb, int, S_IRUGO); 5637 module_param_named(dif, sdebug_dif, int, S_IRUGO); 5638 module_param_named(dix, sdebug_dix, int, S_IRUGO); 5639 module_param_named(dsense, sdebug_dsense, int, S_IRUGO | S_IWUSR); 5640 module_param_named(every_nth, sdebug_every_nth, int, S_IRUGO | S_IWUSR); 5641 module_param_named(fake_rw, sdebug_fake_rw, int, S_IRUGO | S_IWUSR); 5642 module_param_named(guard, sdebug_guard, uint, S_IRUGO); 5643 module_param_named(host_lock, sdebug_host_lock, bool, S_IRUGO | S_IWUSR); 5644 module_param_named(host_max_queue, sdebug_host_max_queue, int, S_IRUGO); 5645 module_param_string(inq_product, sdebug_inq_product_id, 5646 sizeof(sdebug_inq_product_id), S_IRUGO | S_IWUSR); 5647 module_param_string(inq_rev, sdebug_inq_product_rev, 5648 sizeof(sdebug_inq_product_rev), S_IRUGO | S_IWUSR); 5649 module_param_string(inq_vendor, sdebug_inq_vendor_id, 5650 sizeof(sdebug_inq_vendor_id), S_IRUGO | S_IWUSR); 5651 module_param_named(lbprz, sdebug_lbprz, int, S_IRUGO); 5652 module_param_named(lbpu, sdebug_lbpu, int, S_IRUGO); 5653 module_param_named(lbpws, sdebug_lbpws, int, S_IRUGO); 5654 module_param_named(lbpws10, sdebug_lbpws10, int, S_IRUGO); 5655 module_param_named(lowest_aligned, sdebug_lowest_aligned, int, S_IRUGO); 5656 module_param_named(lun_format, sdebug_lun_am_i, int, S_IRUGO | S_IWUSR); 5657 module_param_named(max_luns, sdebug_max_luns, int, S_IRUGO | S_IWUSR); 5658 module_param_named(max_queue, sdebug_max_queue, int, S_IRUGO | S_IWUSR); 5659 module_param_named(medium_error_count, sdebug_medium_error_count, int, 5660 S_IRUGO | S_IWUSR); 5661 module_param_named(medium_error_start, sdebug_medium_error_start, int, 5662 S_IRUGO | S_IWUSR); 5663 module_param_named(ndelay, sdebug_ndelay, int, S_IRUGO | S_IWUSR); 5664 module_param_named(no_lun_0, sdebug_no_lun_0, int, S_IRUGO | S_IWUSR); 5665 module_param_named(no_uld, sdebug_no_uld, int, S_IRUGO); 5666 module_param_named(num_parts, sdebug_num_parts, int, S_IRUGO); 5667 module_param_named(num_tgts, sdebug_num_tgts, int, S_IRUGO | S_IWUSR); 5668 module_param_named(opt_blks, sdebug_opt_blks, int, S_IRUGO); 5669 module_param_named(opt_xferlen_exp, sdebug_opt_xferlen_exp, int, S_IRUGO); 5670 module_param_named(opts, sdebug_opts, int, S_IRUGO | S_IWUSR); 5671 module_param_named(per_host_store, sdebug_per_host_store, bool, 5672 S_IRUGO | S_IWUSR); 5673 module_param_named(physblk_exp, sdebug_physblk_exp, int, S_IRUGO); 5674 module_param_named(ptype, sdebug_ptype, int, S_IRUGO | S_IWUSR); 5675 module_param_named(random, sdebug_random, bool, S_IRUGO | S_IWUSR); 5676 module_param_named(removable, sdebug_removable, bool, S_IRUGO | S_IWUSR); 5677 module_param_named(scsi_level, sdebug_scsi_level, int, S_IRUGO); 5678 module_param_named(sector_size, sdebug_sector_size, int, S_IRUGO); 5679 module_param_named(statistics, sdebug_statistics, bool, S_IRUGO | S_IWUSR); 5680 module_param_named(strict, sdebug_strict, bool, S_IRUGO | S_IWUSR); 5681 module_param_named(submit_queues, submit_queues, int, S_IRUGO); 5682 module_param_named(poll_queues, poll_queues, int, S_IRUGO); 5683 module_param_named(tur_ms_to_ready, sdeb_tur_ms_to_ready, int, S_IRUGO); 5684 module_param_named(unmap_alignment, sdebug_unmap_alignment, int, S_IRUGO); 5685 module_param_named(unmap_granularity, sdebug_unmap_granularity, int, S_IRUGO); 5686 module_param_named(unmap_max_blocks, sdebug_unmap_max_blocks, int, S_IRUGO); 5687 module_param_named(unmap_max_desc, sdebug_unmap_max_desc, int, S_IRUGO); 5688 module_param_named(uuid_ctl, sdebug_uuid_ctl, int, S_IRUGO); 5689 module_param_named(virtual_gb, sdebug_virtual_gb, int, S_IRUGO | S_IWUSR); 5690 module_param_named(vpd_use_hostno, sdebug_vpd_use_hostno, int, 5691 S_IRUGO | S_IWUSR); 5692 module_param_named(wp, sdebug_wp, bool, S_IRUGO | S_IWUSR); 5693 module_param_named(write_same_length, sdebug_write_same_length, int, 5694 S_IRUGO | S_IWUSR); 5695 module_param_named(zbc, sdeb_zbc_model_s, charp, S_IRUGO); 5696 module_param_named(zone_max_open, sdeb_zbc_max_open, int, S_IRUGO); 5697 module_param_named(zone_nr_conv, sdeb_zbc_nr_conv, int, S_IRUGO); 5698 module_param_named(zone_size_mb, sdeb_zbc_zone_size_mb, int, S_IRUGO); 5699 5700 MODULE_AUTHOR("Eric Youngdale + Douglas Gilbert"); 5701 MODULE_DESCRIPTION("SCSI debug adapter driver"); 5702 MODULE_LICENSE("GPL"); 5703 MODULE_VERSION(SDEBUG_VERSION); 5704 5705 MODULE_PARM_DESC(add_host, "add n hosts, in sysfs if negative remove host(s) (def=1)"); 5706 MODULE_PARM_DESC(ato, "application tag ownership: 0=disk 1=host (def=1)"); 5707 MODULE_PARM_DESC(cdb_len, "suggest CDB lengths to drivers (def=10)"); 5708 MODULE_PARM_DESC(clustering, "when set enables larger transfers (def=0)"); 5709 MODULE_PARM_DESC(delay, "response delay (def=1 jiffy); 0:imm, -1,-2:tiny"); 5710 MODULE_PARM_DESC(dev_size_mb, "size in MiB of ram shared by devs(def=8)"); 5711 MODULE_PARM_DESC(dif, "data integrity field type: 0-3 (def=0)"); 5712 MODULE_PARM_DESC(dix, "data integrity extensions mask (def=0)"); 5713 MODULE_PARM_DESC(dsense, "use descriptor sense format(def=0 -> fixed)"); 5714 MODULE_PARM_DESC(every_nth, "timeout every nth command(def=0)"); 5715 MODULE_PARM_DESC(fake_rw, "fake reads/writes instead of copying (def=0)"); 5716 MODULE_PARM_DESC(guard, "protection checksum: 0=crc, 1=ip (def=0)"); 5717 MODULE_PARM_DESC(host_lock, "host_lock is ignored (def=0)"); 5718 MODULE_PARM_DESC(host_max_queue, 5719 "host max # of queued cmds (0 to max(def) [max_queue fixed equal for !0])"); 5720 MODULE_PARM_DESC(inq_product, "SCSI INQUIRY product string (def=\"scsi_debug\")"); 5721 MODULE_PARM_DESC(inq_rev, "SCSI INQUIRY revision string (def=\"" 5722 SDEBUG_VERSION "\")"); 5723 MODULE_PARM_DESC(inq_vendor, "SCSI INQUIRY vendor string (def=\"Linux\")"); 5724 MODULE_PARM_DESC(lbprz, 5725 "on read unmapped LBs return 0 when 1 (def), return 0xff when 2"); 5726 MODULE_PARM_DESC(lbpu, "enable LBP, support UNMAP command (def=0)"); 5727 MODULE_PARM_DESC(lbpws, "enable LBP, support WRITE SAME(16) with UNMAP bit (def=0)"); 5728 MODULE_PARM_DESC(lbpws10, "enable LBP, support WRITE SAME(10) with UNMAP bit (def=0)"); 5729 MODULE_PARM_DESC(lowest_aligned, "lowest aligned lba (def=0)"); 5730 MODULE_PARM_DESC(lun_format, "LUN format: 0->peripheral (def); 1 --> flat address method"); 5731 MODULE_PARM_DESC(max_luns, "number of LUNs per target to simulate(def=1)"); 5732 MODULE_PARM_DESC(max_queue, "max number of queued commands (1 to max(def))"); 5733 MODULE_PARM_DESC(medium_error_count, "count of sectors to return follow on MEDIUM error"); 5734 MODULE_PARM_DESC(medium_error_start, "starting sector number to return MEDIUM error"); 5735 MODULE_PARM_DESC(ndelay, "response delay in nanoseconds (def=0 -> ignore)"); 5736 MODULE_PARM_DESC(no_lun_0, "no LU number 0 (def=0 -> have lun 0)"); 5737 MODULE_PARM_DESC(no_uld, "stop ULD (e.g. sd driver) attaching (def=0))"); 5738 MODULE_PARM_DESC(num_parts, "number of partitions(def=0)"); 5739 MODULE_PARM_DESC(num_tgts, "number of targets per host to simulate(def=1)"); 5740 MODULE_PARM_DESC(opt_blks, "optimal transfer length in blocks (def=1024)"); 5741 MODULE_PARM_DESC(opt_xferlen_exp, "optimal transfer length granularity exponent (def=physblk_exp)"); 5742 MODULE_PARM_DESC(opts, "1->noise, 2->medium_err, 4->timeout, 8->recovered_err... (def=0)"); 5743 MODULE_PARM_DESC(per_host_store, "If set, next positive add_host will get new store (def=0)"); 5744 MODULE_PARM_DESC(physblk_exp, "physical block exponent (def=0)"); 5745 MODULE_PARM_DESC(poll_queues, "support for iouring iopoll queues (1 to max(submit_queues - 1))"); 5746 MODULE_PARM_DESC(ptype, "SCSI peripheral type(def=0[disk])"); 5747 MODULE_PARM_DESC(random, "If set, uniformly randomize command duration between 0 and delay_in_ns"); 5748 MODULE_PARM_DESC(removable, "claim to have removable media (def=0)"); 5749 MODULE_PARM_DESC(scsi_level, "SCSI level to simulate(def=7[SPC-5])"); 5750 MODULE_PARM_DESC(sector_size, "logical block size in bytes (def=512)"); 5751 MODULE_PARM_DESC(statistics, "collect statistics on commands, queues (def=0)"); 5752 MODULE_PARM_DESC(strict, "stricter checks: reserved field in cdb (def=0)"); 5753 MODULE_PARM_DESC(submit_queues, "support for block multi-queue (def=1)"); 5754 MODULE_PARM_DESC(tur_ms_to_ready, "TEST UNIT READY millisecs before initial good status (def=0)"); 5755 MODULE_PARM_DESC(unmap_alignment, "lowest aligned thin provisioning lba (def=0)"); 5756 MODULE_PARM_DESC(unmap_granularity, "thin provisioning granularity in blocks (def=1)"); 5757 MODULE_PARM_DESC(unmap_max_blocks, "max # of blocks can be unmapped in one cmd (def=0xffffffff)"); 5758 MODULE_PARM_DESC(unmap_max_desc, "max # of ranges that can be unmapped in one cmd (def=256)"); 5759 MODULE_PARM_DESC(uuid_ctl, 5760 "1->use uuid for lu name, 0->don't, 2->all use same (def=0)"); 5761 MODULE_PARM_DESC(virtual_gb, "virtual gigabyte (GiB) size (def=0 -> use dev_size_mb)"); 5762 MODULE_PARM_DESC(vpd_use_hostno, "0 -> dev ids ignore hostno (def=1 -> unique dev ids)"); 5763 MODULE_PARM_DESC(wp, "Write Protect (def=0)"); 5764 MODULE_PARM_DESC(write_same_length, "Maximum blocks per WRITE SAME cmd (def=0xffff)"); 5765 MODULE_PARM_DESC(zbc, "'none' [0]; 'aware' [1]; 'managed' [2] (def=0). Can have 'host-' prefix"); 5766 MODULE_PARM_DESC(zone_max_open, "Maximum number of open zones; [0] for no limit (def=auto)"); 5767 MODULE_PARM_DESC(zone_nr_conv, "Number of conventional zones (def=1)"); 5768 MODULE_PARM_DESC(zone_size_mb, "Zone size in MiB (def=auto)"); 5769 5770 #define SDEBUG_INFO_LEN 256 5771 static char sdebug_info[SDEBUG_INFO_LEN]; 5772 5773 static const char *scsi_debug_info(struct Scsi_Host *shp) 5774 { 5775 int k; 5776 5777 k = scnprintf(sdebug_info, SDEBUG_INFO_LEN, "%s: version %s [%s]\n", 5778 my_name, SDEBUG_VERSION, sdebug_version_date); 5779 if (k >= (SDEBUG_INFO_LEN - 1)) 5780 return sdebug_info; 5781 scnprintf(sdebug_info + k, SDEBUG_INFO_LEN - k, 5782 " dev_size_mb=%d, opts=0x%x, submit_queues=%d, %s=%d", 5783 sdebug_dev_size_mb, sdebug_opts, submit_queues, 5784 "statistics", (int)sdebug_statistics); 5785 return sdebug_info; 5786 } 5787 5788 /* 'echo <val> > /proc/scsi/scsi_debug/<host_id>' writes to opts */ 5789 static int scsi_debug_write_info(struct Scsi_Host *host, char *buffer, 5790 int length) 5791 { 5792 char arr[16]; 5793 int opts; 5794 int minLen = length > 15 ? 15 : length; 5795 5796 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) 5797 return -EACCES; 5798 memcpy(arr, buffer, minLen); 5799 arr[minLen] = '\0'; 5800 if (1 != sscanf(arr, "%d", &opts)) 5801 return -EINVAL; 5802 sdebug_opts = opts; 5803 sdebug_verbose = !!(SDEBUG_OPT_NOISE & opts); 5804 sdebug_any_injecting_opt = !!(SDEBUG_OPT_ALL_INJECTING & opts); 5805 if (sdebug_every_nth != 0) 5806 tweak_cmnd_count(); 5807 return length; 5808 } 5809 5810 /* Output seen with 'cat /proc/scsi/scsi_debug/<host_id>'. It will be the 5811 * same for each scsi_debug host (if more than one). Some of the counters 5812 * output are not atomics so might be inaccurate in a busy system. */ 5813 static int scsi_debug_show_info(struct seq_file *m, struct Scsi_Host *host) 5814 { 5815 int f, j, l; 5816 struct sdebug_queue *sqp; 5817 struct sdebug_host_info *sdhp; 5818 5819 seq_printf(m, "scsi_debug adapter driver, version %s [%s]\n", 5820 SDEBUG_VERSION, sdebug_version_date); 5821 seq_printf(m, "num_tgts=%d, %ssize=%d MB, opts=0x%x, every_nth=%d\n", 5822 sdebug_num_tgts, "shared (ram) ", sdebug_dev_size_mb, 5823 sdebug_opts, sdebug_every_nth); 5824 seq_printf(m, "delay=%d, ndelay=%d, max_luns=%d, sector_size=%d %s\n", 5825 sdebug_jdelay, sdebug_ndelay, sdebug_max_luns, 5826 sdebug_sector_size, "bytes"); 5827 seq_printf(m, "cylinders=%d, heads=%d, sectors=%d, command aborts=%d\n", 5828 sdebug_cylinders_per, sdebug_heads, sdebug_sectors_per, 5829 num_aborts); 5830 seq_printf(m, "RESETs: device=%d, target=%d, bus=%d, host=%d\n", 5831 num_dev_resets, num_target_resets, num_bus_resets, 5832 num_host_resets); 5833 seq_printf(m, "dix_reads=%d, dix_writes=%d, dif_errors=%d\n", 5834 dix_reads, dix_writes, dif_errors); 5835 seq_printf(m, "usec_in_jiffy=%lu, statistics=%d\n", TICK_NSEC / 1000, 5836 sdebug_statistics); 5837 seq_printf(m, "cmnd_count=%d, completions=%d, %s=%d, a_tsf=%d, mq_polls=%d\n", 5838 atomic_read(&sdebug_cmnd_count), 5839 atomic_read(&sdebug_completions), 5840 "miss_cpus", atomic_read(&sdebug_miss_cpus), 5841 atomic_read(&sdebug_a_tsf), 5842 atomic_read(&sdeb_mq_poll_count)); 5843 5844 seq_printf(m, "submit_queues=%d\n", submit_queues); 5845 for (j = 0, sqp = sdebug_q_arr; j < submit_queues; ++j, ++sqp) { 5846 seq_printf(m, " queue %d:\n", j); 5847 f = find_first_bit(sqp->in_use_bm, sdebug_max_queue); 5848 if (f != sdebug_max_queue) { 5849 l = find_last_bit(sqp->in_use_bm, sdebug_max_queue); 5850 seq_printf(m, " in_use_bm BUSY: %s: %d,%d\n", 5851 "first,last bits", f, l); 5852 } 5853 } 5854 5855 seq_printf(m, "this host_no=%d\n", host->host_no); 5856 if (!xa_empty(per_store_ap)) { 5857 bool niu; 5858 int idx; 5859 unsigned long l_idx; 5860 struct sdeb_store_info *sip; 5861 5862 seq_puts(m, "\nhost list:\n"); 5863 j = 0; 5864 list_for_each_entry(sdhp, &sdebug_host_list, host_list) { 5865 idx = sdhp->si_idx; 5866 seq_printf(m, " %d: host_no=%d, si_idx=%d\n", j, 5867 sdhp->shost->host_no, idx); 5868 ++j; 5869 } 5870 seq_printf(m, "\nper_store array [most_recent_idx=%d]:\n", 5871 sdeb_most_recent_idx); 5872 j = 0; 5873 xa_for_each(per_store_ap, l_idx, sip) { 5874 niu = xa_get_mark(per_store_ap, l_idx, 5875 SDEB_XA_NOT_IN_USE); 5876 idx = (int)l_idx; 5877 seq_printf(m, " %d: idx=%d%s\n", j, idx, 5878 (niu ? " not_in_use" : "")); 5879 ++j; 5880 } 5881 } 5882 return 0; 5883 } 5884 5885 static ssize_t delay_show(struct device_driver *ddp, char *buf) 5886 { 5887 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_jdelay); 5888 } 5889 /* Returns -EBUSY if jdelay is being changed and commands are queued. The unit 5890 * of delay is jiffies. 5891 */ 5892 static ssize_t delay_store(struct device_driver *ddp, const char *buf, 5893 size_t count) 5894 { 5895 int jdelay, res; 5896 5897 if (count > 0 && sscanf(buf, "%d", &jdelay) == 1) { 5898 res = count; 5899 if (sdebug_jdelay != jdelay) { 5900 int j, k; 5901 struct sdebug_queue *sqp; 5902 5903 block_unblock_all_queues(true); 5904 for (j = 0, sqp = sdebug_q_arr; j < submit_queues; 5905 ++j, ++sqp) { 5906 k = find_first_bit(sqp->in_use_bm, 5907 sdebug_max_queue); 5908 if (k != sdebug_max_queue) { 5909 res = -EBUSY; /* queued commands */ 5910 break; 5911 } 5912 } 5913 if (res > 0) { 5914 sdebug_jdelay = jdelay; 5915 sdebug_ndelay = 0; 5916 } 5917 block_unblock_all_queues(false); 5918 } 5919 return res; 5920 } 5921 return -EINVAL; 5922 } 5923 static DRIVER_ATTR_RW(delay); 5924 5925 static ssize_t ndelay_show(struct device_driver *ddp, char *buf) 5926 { 5927 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_ndelay); 5928 } 5929 /* Returns -EBUSY if ndelay is being changed and commands are queued */ 5930 /* If > 0 and accepted then sdebug_jdelay is set to JDELAY_OVERRIDDEN */ 5931 static ssize_t ndelay_store(struct device_driver *ddp, const char *buf, 5932 size_t count) 5933 { 5934 int ndelay, res; 5935 5936 if ((count > 0) && (1 == sscanf(buf, "%d", &ndelay)) && 5937 (ndelay >= 0) && (ndelay < (1000 * 1000 * 1000))) { 5938 res = count; 5939 if (sdebug_ndelay != ndelay) { 5940 int j, k; 5941 struct sdebug_queue *sqp; 5942 5943 block_unblock_all_queues(true); 5944 for (j = 0, sqp = sdebug_q_arr; j < submit_queues; 5945 ++j, ++sqp) { 5946 k = find_first_bit(sqp->in_use_bm, 5947 sdebug_max_queue); 5948 if (k != sdebug_max_queue) { 5949 res = -EBUSY; /* queued commands */ 5950 break; 5951 } 5952 } 5953 if (res > 0) { 5954 sdebug_ndelay = ndelay; 5955 sdebug_jdelay = ndelay ? JDELAY_OVERRIDDEN 5956 : DEF_JDELAY; 5957 } 5958 block_unblock_all_queues(false); 5959 } 5960 return res; 5961 } 5962 return -EINVAL; 5963 } 5964 static DRIVER_ATTR_RW(ndelay); 5965 5966 static ssize_t opts_show(struct device_driver *ddp, char *buf) 5967 { 5968 return scnprintf(buf, PAGE_SIZE, "0x%x\n", sdebug_opts); 5969 } 5970 5971 static ssize_t opts_store(struct device_driver *ddp, const char *buf, 5972 size_t count) 5973 { 5974 int opts; 5975 char work[20]; 5976 5977 if (sscanf(buf, "%10s", work) == 1) { 5978 if (strncasecmp(work, "0x", 2) == 0) { 5979 if (kstrtoint(work + 2, 16, &opts) == 0) 5980 goto opts_done; 5981 } else { 5982 if (kstrtoint(work, 10, &opts) == 0) 5983 goto opts_done; 5984 } 5985 } 5986 return -EINVAL; 5987 opts_done: 5988 sdebug_opts = opts; 5989 sdebug_verbose = !!(SDEBUG_OPT_NOISE & opts); 5990 sdebug_any_injecting_opt = !!(SDEBUG_OPT_ALL_INJECTING & opts); 5991 tweak_cmnd_count(); 5992 return count; 5993 } 5994 static DRIVER_ATTR_RW(opts); 5995 5996 static ssize_t ptype_show(struct device_driver *ddp, char *buf) 5997 { 5998 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_ptype); 5999 } 6000 static ssize_t ptype_store(struct device_driver *ddp, const char *buf, 6001 size_t count) 6002 { 6003 int n; 6004 6005 /* Cannot change from or to TYPE_ZBC with sysfs */ 6006 if (sdebug_ptype == TYPE_ZBC) 6007 return -EINVAL; 6008 6009 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) { 6010 if (n == TYPE_ZBC) 6011 return -EINVAL; 6012 sdebug_ptype = n; 6013 return count; 6014 } 6015 return -EINVAL; 6016 } 6017 static DRIVER_ATTR_RW(ptype); 6018 6019 static ssize_t dsense_show(struct device_driver *ddp, char *buf) 6020 { 6021 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_dsense); 6022 } 6023 static ssize_t dsense_store(struct device_driver *ddp, const char *buf, 6024 size_t count) 6025 { 6026 int n; 6027 6028 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) { 6029 sdebug_dsense = n; 6030 return count; 6031 } 6032 return -EINVAL; 6033 } 6034 static DRIVER_ATTR_RW(dsense); 6035 6036 static ssize_t fake_rw_show(struct device_driver *ddp, char *buf) 6037 { 6038 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_fake_rw); 6039 } 6040 static ssize_t fake_rw_store(struct device_driver *ddp, const char *buf, 6041 size_t count) 6042 { 6043 int n, idx; 6044 6045 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) { 6046 bool want_store = (n == 0); 6047 struct sdebug_host_info *sdhp; 6048 6049 n = (n > 0); 6050 sdebug_fake_rw = (sdebug_fake_rw > 0); 6051 if (sdebug_fake_rw == n) 6052 return count; /* not transitioning so do nothing */ 6053 6054 if (want_store) { /* 1 --> 0 transition, set up store */ 6055 if (sdeb_first_idx < 0) { 6056 idx = sdebug_add_store(); 6057 if (idx < 0) 6058 return idx; 6059 } else { 6060 idx = sdeb_first_idx; 6061 xa_clear_mark(per_store_ap, idx, 6062 SDEB_XA_NOT_IN_USE); 6063 } 6064 /* make all hosts use same store */ 6065 list_for_each_entry(sdhp, &sdebug_host_list, 6066 host_list) { 6067 if (sdhp->si_idx != idx) { 6068 xa_set_mark(per_store_ap, sdhp->si_idx, 6069 SDEB_XA_NOT_IN_USE); 6070 sdhp->si_idx = idx; 6071 } 6072 } 6073 sdeb_most_recent_idx = idx; 6074 } else { /* 0 --> 1 transition is trigger for shrink */ 6075 sdebug_erase_all_stores(true /* apart from first */); 6076 } 6077 sdebug_fake_rw = n; 6078 return count; 6079 } 6080 return -EINVAL; 6081 } 6082 static DRIVER_ATTR_RW(fake_rw); 6083 6084 static ssize_t no_lun_0_show(struct device_driver *ddp, char *buf) 6085 { 6086 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_no_lun_0); 6087 } 6088 static ssize_t no_lun_0_store(struct device_driver *ddp, const char *buf, 6089 size_t count) 6090 { 6091 int n; 6092 6093 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) { 6094 sdebug_no_lun_0 = n; 6095 return count; 6096 } 6097 return -EINVAL; 6098 } 6099 static DRIVER_ATTR_RW(no_lun_0); 6100 6101 static ssize_t num_tgts_show(struct device_driver *ddp, char *buf) 6102 { 6103 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_num_tgts); 6104 } 6105 static ssize_t num_tgts_store(struct device_driver *ddp, const char *buf, 6106 size_t count) 6107 { 6108 int n; 6109 6110 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) { 6111 sdebug_num_tgts = n; 6112 sdebug_max_tgts_luns(); 6113 return count; 6114 } 6115 return -EINVAL; 6116 } 6117 static DRIVER_ATTR_RW(num_tgts); 6118 6119 static ssize_t dev_size_mb_show(struct device_driver *ddp, char *buf) 6120 { 6121 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_dev_size_mb); 6122 } 6123 static DRIVER_ATTR_RO(dev_size_mb); 6124 6125 static ssize_t per_host_store_show(struct device_driver *ddp, char *buf) 6126 { 6127 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_per_host_store); 6128 } 6129 6130 static ssize_t per_host_store_store(struct device_driver *ddp, const char *buf, 6131 size_t count) 6132 { 6133 bool v; 6134 6135 if (kstrtobool(buf, &v)) 6136 return -EINVAL; 6137 6138 sdebug_per_host_store = v; 6139 return count; 6140 } 6141 static DRIVER_ATTR_RW(per_host_store); 6142 6143 static ssize_t num_parts_show(struct device_driver *ddp, char *buf) 6144 { 6145 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_num_parts); 6146 } 6147 static DRIVER_ATTR_RO(num_parts); 6148 6149 static ssize_t every_nth_show(struct device_driver *ddp, char *buf) 6150 { 6151 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_every_nth); 6152 } 6153 static ssize_t every_nth_store(struct device_driver *ddp, const char *buf, 6154 size_t count) 6155 { 6156 int nth; 6157 char work[20]; 6158 6159 if (sscanf(buf, "%10s", work) == 1) { 6160 if (strncasecmp(work, "0x", 2) == 0) { 6161 if (kstrtoint(work + 2, 16, &nth) == 0) 6162 goto every_nth_done; 6163 } else { 6164 if (kstrtoint(work, 10, &nth) == 0) 6165 goto every_nth_done; 6166 } 6167 } 6168 return -EINVAL; 6169 6170 every_nth_done: 6171 sdebug_every_nth = nth; 6172 if (nth && !sdebug_statistics) { 6173 pr_info("every_nth needs statistics=1, set it\n"); 6174 sdebug_statistics = true; 6175 } 6176 tweak_cmnd_count(); 6177 return count; 6178 } 6179 static DRIVER_ATTR_RW(every_nth); 6180 6181 static ssize_t lun_format_show(struct device_driver *ddp, char *buf) 6182 { 6183 return scnprintf(buf, PAGE_SIZE, "%d\n", (int)sdebug_lun_am); 6184 } 6185 static ssize_t lun_format_store(struct device_driver *ddp, const char *buf, 6186 size_t count) 6187 { 6188 int n; 6189 bool changed; 6190 6191 if (kstrtoint(buf, 0, &n)) 6192 return -EINVAL; 6193 if (n >= 0) { 6194 if (n > (int)SAM_LUN_AM_FLAT) { 6195 pr_warn("only LUN address methods 0 and 1 are supported\n"); 6196 return -EINVAL; 6197 } 6198 changed = ((int)sdebug_lun_am != n); 6199 sdebug_lun_am = n; 6200 if (changed && sdebug_scsi_level >= 5) { /* >= SPC-3 */ 6201 struct sdebug_host_info *sdhp; 6202 struct sdebug_dev_info *dp; 6203 6204 spin_lock(&sdebug_host_list_lock); 6205 list_for_each_entry(sdhp, &sdebug_host_list, host_list) { 6206 list_for_each_entry(dp, &sdhp->dev_info_list, dev_list) { 6207 set_bit(SDEBUG_UA_LUNS_CHANGED, dp->uas_bm); 6208 } 6209 } 6210 spin_unlock(&sdebug_host_list_lock); 6211 } 6212 return count; 6213 } 6214 return -EINVAL; 6215 } 6216 static DRIVER_ATTR_RW(lun_format); 6217 6218 static ssize_t max_luns_show(struct device_driver *ddp, char *buf) 6219 { 6220 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_max_luns); 6221 } 6222 static ssize_t max_luns_store(struct device_driver *ddp, const char *buf, 6223 size_t count) 6224 { 6225 int n; 6226 bool changed; 6227 6228 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) { 6229 if (n > 256) { 6230 pr_warn("max_luns can be no more than 256\n"); 6231 return -EINVAL; 6232 } 6233 changed = (sdebug_max_luns != n); 6234 sdebug_max_luns = n; 6235 sdebug_max_tgts_luns(); 6236 if (changed && (sdebug_scsi_level >= 5)) { /* >= SPC-3 */ 6237 struct sdebug_host_info *sdhp; 6238 struct sdebug_dev_info *dp; 6239 6240 spin_lock(&sdebug_host_list_lock); 6241 list_for_each_entry(sdhp, &sdebug_host_list, 6242 host_list) { 6243 list_for_each_entry(dp, &sdhp->dev_info_list, 6244 dev_list) { 6245 set_bit(SDEBUG_UA_LUNS_CHANGED, 6246 dp->uas_bm); 6247 } 6248 } 6249 spin_unlock(&sdebug_host_list_lock); 6250 } 6251 return count; 6252 } 6253 return -EINVAL; 6254 } 6255 static DRIVER_ATTR_RW(max_luns); 6256 6257 static ssize_t max_queue_show(struct device_driver *ddp, char *buf) 6258 { 6259 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_max_queue); 6260 } 6261 /* N.B. max_queue can be changed while there are queued commands. In flight 6262 * commands beyond the new max_queue will be completed. */ 6263 static ssize_t max_queue_store(struct device_driver *ddp, const char *buf, 6264 size_t count) 6265 { 6266 int j, n, k, a; 6267 struct sdebug_queue *sqp; 6268 6269 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n > 0) && 6270 (n <= SDEBUG_CANQUEUE) && 6271 (sdebug_host_max_queue == 0)) { 6272 block_unblock_all_queues(true); 6273 k = 0; 6274 for (j = 0, sqp = sdebug_q_arr; j < submit_queues; 6275 ++j, ++sqp) { 6276 a = find_last_bit(sqp->in_use_bm, SDEBUG_CANQUEUE); 6277 if (a > k) 6278 k = a; 6279 } 6280 sdebug_max_queue = n; 6281 if (k == SDEBUG_CANQUEUE) 6282 atomic_set(&retired_max_queue, 0); 6283 else if (k >= n) 6284 atomic_set(&retired_max_queue, k + 1); 6285 else 6286 atomic_set(&retired_max_queue, 0); 6287 block_unblock_all_queues(false); 6288 return count; 6289 } 6290 return -EINVAL; 6291 } 6292 static DRIVER_ATTR_RW(max_queue); 6293 6294 static ssize_t host_max_queue_show(struct device_driver *ddp, char *buf) 6295 { 6296 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_host_max_queue); 6297 } 6298 6299 /* 6300 * Since this is used for .can_queue, and we get the hc_idx tag from the bitmap 6301 * in range [0, sdebug_host_max_queue), we can't change it. 6302 */ 6303 static DRIVER_ATTR_RO(host_max_queue); 6304 6305 static ssize_t no_uld_show(struct device_driver *ddp, char *buf) 6306 { 6307 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_no_uld); 6308 } 6309 static DRIVER_ATTR_RO(no_uld); 6310 6311 static ssize_t scsi_level_show(struct device_driver *ddp, char *buf) 6312 { 6313 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_scsi_level); 6314 } 6315 static DRIVER_ATTR_RO(scsi_level); 6316 6317 static ssize_t virtual_gb_show(struct device_driver *ddp, char *buf) 6318 { 6319 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_virtual_gb); 6320 } 6321 static ssize_t virtual_gb_store(struct device_driver *ddp, const char *buf, 6322 size_t count) 6323 { 6324 int n; 6325 bool changed; 6326 6327 /* Ignore capacity change for ZBC drives for now */ 6328 if (sdeb_zbc_in_use) 6329 return -ENOTSUPP; 6330 6331 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) { 6332 changed = (sdebug_virtual_gb != n); 6333 sdebug_virtual_gb = n; 6334 sdebug_capacity = get_sdebug_capacity(); 6335 if (changed) { 6336 struct sdebug_host_info *sdhp; 6337 struct sdebug_dev_info *dp; 6338 6339 spin_lock(&sdebug_host_list_lock); 6340 list_for_each_entry(sdhp, &sdebug_host_list, 6341 host_list) { 6342 list_for_each_entry(dp, &sdhp->dev_info_list, 6343 dev_list) { 6344 set_bit(SDEBUG_UA_CAPACITY_CHANGED, 6345 dp->uas_bm); 6346 } 6347 } 6348 spin_unlock(&sdebug_host_list_lock); 6349 } 6350 return count; 6351 } 6352 return -EINVAL; 6353 } 6354 static DRIVER_ATTR_RW(virtual_gb); 6355 6356 static ssize_t add_host_show(struct device_driver *ddp, char *buf) 6357 { 6358 /* absolute number of hosts currently active is what is shown */ 6359 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_num_hosts); 6360 } 6361 6362 static ssize_t add_host_store(struct device_driver *ddp, const char *buf, 6363 size_t count) 6364 { 6365 bool found; 6366 unsigned long idx; 6367 struct sdeb_store_info *sip; 6368 bool want_phs = (sdebug_fake_rw == 0) && sdebug_per_host_store; 6369 int delta_hosts; 6370 6371 if (sscanf(buf, "%d", &delta_hosts) != 1) 6372 return -EINVAL; 6373 if (delta_hosts > 0) { 6374 do { 6375 found = false; 6376 if (want_phs) { 6377 xa_for_each_marked(per_store_ap, idx, sip, 6378 SDEB_XA_NOT_IN_USE) { 6379 sdeb_most_recent_idx = (int)idx; 6380 found = true; 6381 break; 6382 } 6383 if (found) /* re-use case */ 6384 sdebug_add_host_helper((int)idx); 6385 else 6386 sdebug_do_add_host(true); 6387 } else { 6388 sdebug_do_add_host(false); 6389 } 6390 } while (--delta_hosts); 6391 } else if (delta_hosts < 0) { 6392 do { 6393 sdebug_do_remove_host(false); 6394 } while (++delta_hosts); 6395 } 6396 return count; 6397 } 6398 static DRIVER_ATTR_RW(add_host); 6399 6400 static ssize_t vpd_use_hostno_show(struct device_driver *ddp, char *buf) 6401 { 6402 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_vpd_use_hostno); 6403 } 6404 static ssize_t vpd_use_hostno_store(struct device_driver *ddp, const char *buf, 6405 size_t count) 6406 { 6407 int n; 6408 6409 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) { 6410 sdebug_vpd_use_hostno = n; 6411 return count; 6412 } 6413 return -EINVAL; 6414 } 6415 static DRIVER_ATTR_RW(vpd_use_hostno); 6416 6417 static ssize_t statistics_show(struct device_driver *ddp, char *buf) 6418 { 6419 return scnprintf(buf, PAGE_SIZE, "%d\n", (int)sdebug_statistics); 6420 } 6421 static ssize_t statistics_store(struct device_driver *ddp, const char *buf, 6422 size_t count) 6423 { 6424 int n; 6425 6426 if ((count > 0) && (sscanf(buf, "%d", &n) == 1) && (n >= 0)) { 6427 if (n > 0) 6428 sdebug_statistics = true; 6429 else { 6430 clear_queue_stats(); 6431 sdebug_statistics = false; 6432 } 6433 return count; 6434 } 6435 return -EINVAL; 6436 } 6437 static DRIVER_ATTR_RW(statistics); 6438 6439 static ssize_t sector_size_show(struct device_driver *ddp, char *buf) 6440 { 6441 return scnprintf(buf, PAGE_SIZE, "%u\n", sdebug_sector_size); 6442 } 6443 static DRIVER_ATTR_RO(sector_size); 6444 6445 static ssize_t submit_queues_show(struct device_driver *ddp, char *buf) 6446 { 6447 return scnprintf(buf, PAGE_SIZE, "%d\n", submit_queues); 6448 } 6449 static DRIVER_ATTR_RO(submit_queues); 6450 6451 static ssize_t dix_show(struct device_driver *ddp, char *buf) 6452 { 6453 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_dix); 6454 } 6455 static DRIVER_ATTR_RO(dix); 6456 6457 static ssize_t dif_show(struct device_driver *ddp, char *buf) 6458 { 6459 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_dif); 6460 } 6461 static DRIVER_ATTR_RO(dif); 6462 6463 static ssize_t guard_show(struct device_driver *ddp, char *buf) 6464 { 6465 return scnprintf(buf, PAGE_SIZE, "%u\n", sdebug_guard); 6466 } 6467 static DRIVER_ATTR_RO(guard); 6468 6469 static ssize_t ato_show(struct device_driver *ddp, char *buf) 6470 { 6471 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_ato); 6472 } 6473 static DRIVER_ATTR_RO(ato); 6474 6475 static ssize_t map_show(struct device_driver *ddp, char *buf) 6476 { 6477 ssize_t count = 0; 6478 6479 if (!scsi_debug_lbp()) 6480 return scnprintf(buf, PAGE_SIZE, "0-%u\n", 6481 sdebug_store_sectors); 6482 6483 if (sdebug_fake_rw == 0 && !xa_empty(per_store_ap)) { 6484 struct sdeb_store_info *sip = xa_load(per_store_ap, 0); 6485 6486 if (sip) 6487 count = scnprintf(buf, PAGE_SIZE - 1, "%*pbl", 6488 (int)map_size, sip->map_storep); 6489 } 6490 buf[count++] = '\n'; 6491 buf[count] = '\0'; 6492 6493 return count; 6494 } 6495 static DRIVER_ATTR_RO(map); 6496 6497 static ssize_t random_show(struct device_driver *ddp, char *buf) 6498 { 6499 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_random); 6500 } 6501 6502 static ssize_t random_store(struct device_driver *ddp, const char *buf, 6503 size_t count) 6504 { 6505 bool v; 6506 6507 if (kstrtobool(buf, &v)) 6508 return -EINVAL; 6509 6510 sdebug_random = v; 6511 return count; 6512 } 6513 static DRIVER_ATTR_RW(random); 6514 6515 static ssize_t removable_show(struct device_driver *ddp, char *buf) 6516 { 6517 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_removable ? 1 : 0); 6518 } 6519 static ssize_t removable_store(struct device_driver *ddp, const char *buf, 6520 size_t count) 6521 { 6522 int n; 6523 6524 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) { 6525 sdebug_removable = (n > 0); 6526 return count; 6527 } 6528 return -EINVAL; 6529 } 6530 static DRIVER_ATTR_RW(removable); 6531 6532 static ssize_t host_lock_show(struct device_driver *ddp, char *buf) 6533 { 6534 return scnprintf(buf, PAGE_SIZE, "%d\n", !!sdebug_host_lock); 6535 } 6536 /* N.B. sdebug_host_lock does nothing, kept for backward compatibility */ 6537 static ssize_t host_lock_store(struct device_driver *ddp, const char *buf, 6538 size_t count) 6539 { 6540 int n; 6541 6542 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) { 6543 sdebug_host_lock = (n > 0); 6544 return count; 6545 } 6546 return -EINVAL; 6547 } 6548 static DRIVER_ATTR_RW(host_lock); 6549 6550 static ssize_t strict_show(struct device_driver *ddp, char *buf) 6551 { 6552 return scnprintf(buf, PAGE_SIZE, "%d\n", !!sdebug_strict); 6553 } 6554 static ssize_t strict_store(struct device_driver *ddp, const char *buf, 6555 size_t count) 6556 { 6557 int n; 6558 6559 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) { 6560 sdebug_strict = (n > 0); 6561 return count; 6562 } 6563 return -EINVAL; 6564 } 6565 static DRIVER_ATTR_RW(strict); 6566 6567 static ssize_t uuid_ctl_show(struct device_driver *ddp, char *buf) 6568 { 6569 return scnprintf(buf, PAGE_SIZE, "%d\n", !!sdebug_uuid_ctl); 6570 } 6571 static DRIVER_ATTR_RO(uuid_ctl); 6572 6573 static ssize_t cdb_len_show(struct device_driver *ddp, char *buf) 6574 { 6575 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_cdb_len); 6576 } 6577 static ssize_t cdb_len_store(struct device_driver *ddp, const char *buf, 6578 size_t count) 6579 { 6580 int ret, n; 6581 6582 ret = kstrtoint(buf, 0, &n); 6583 if (ret) 6584 return ret; 6585 sdebug_cdb_len = n; 6586 all_config_cdb_len(); 6587 return count; 6588 } 6589 static DRIVER_ATTR_RW(cdb_len); 6590 6591 static const char * const zbc_model_strs_a[] = { 6592 [BLK_ZONED_NONE] = "none", 6593 [BLK_ZONED_HA] = "host-aware", 6594 [BLK_ZONED_HM] = "host-managed", 6595 }; 6596 6597 static const char * const zbc_model_strs_b[] = { 6598 [BLK_ZONED_NONE] = "no", 6599 [BLK_ZONED_HA] = "aware", 6600 [BLK_ZONED_HM] = "managed", 6601 }; 6602 6603 static const char * const zbc_model_strs_c[] = { 6604 [BLK_ZONED_NONE] = "0", 6605 [BLK_ZONED_HA] = "1", 6606 [BLK_ZONED_HM] = "2", 6607 }; 6608 6609 static int sdeb_zbc_model_str(const char *cp) 6610 { 6611 int res = sysfs_match_string(zbc_model_strs_a, cp); 6612 6613 if (res < 0) { 6614 res = sysfs_match_string(zbc_model_strs_b, cp); 6615 if (res < 0) { 6616 res = sysfs_match_string(zbc_model_strs_c, cp); 6617 if (res < 0) 6618 return -EINVAL; 6619 } 6620 } 6621 return res; 6622 } 6623 6624 static ssize_t zbc_show(struct device_driver *ddp, char *buf) 6625 { 6626 return scnprintf(buf, PAGE_SIZE, "%s\n", 6627 zbc_model_strs_a[sdeb_zbc_model]); 6628 } 6629 static DRIVER_ATTR_RO(zbc); 6630 6631 static ssize_t tur_ms_to_ready_show(struct device_driver *ddp, char *buf) 6632 { 6633 return scnprintf(buf, PAGE_SIZE, "%d\n", sdeb_tur_ms_to_ready); 6634 } 6635 static DRIVER_ATTR_RO(tur_ms_to_ready); 6636 6637 /* Note: The following array creates attribute files in the 6638 /sys/bus/pseudo/drivers/scsi_debug directory. The advantage of these 6639 files (over those found in the /sys/module/scsi_debug/parameters 6640 directory) is that auxiliary actions can be triggered when an attribute 6641 is changed. For example see: add_host_store() above. 6642 */ 6643 6644 static struct attribute *sdebug_drv_attrs[] = { 6645 &driver_attr_delay.attr, 6646 &driver_attr_opts.attr, 6647 &driver_attr_ptype.attr, 6648 &driver_attr_dsense.attr, 6649 &driver_attr_fake_rw.attr, 6650 &driver_attr_host_max_queue.attr, 6651 &driver_attr_no_lun_0.attr, 6652 &driver_attr_num_tgts.attr, 6653 &driver_attr_dev_size_mb.attr, 6654 &driver_attr_num_parts.attr, 6655 &driver_attr_every_nth.attr, 6656 &driver_attr_lun_format.attr, 6657 &driver_attr_max_luns.attr, 6658 &driver_attr_max_queue.attr, 6659 &driver_attr_no_uld.attr, 6660 &driver_attr_scsi_level.attr, 6661 &driver_attr_virtual_gb.attr, 6662 &driver_attr_add_host.attr, 6663 &driver_attr_per_host_store.attr, 6664 &driver_attr_vpd_use_hostno.attr, 6665 &driver_attr_sector_size.attr, 6666 &driver_attr_statistics.attr, 6667 &driver_attr_submit_queues.attr, 6668 &driver_attr_dix.attr, 6669 &driver_attr_dif.attr, 6670 &driver_attr_guard.attr, 6671 &driver_attr_ato.attr, 6672 &driver_attr_map.attr, 6673 &driver_attr_random.attr, 6674 &driver_attr_removable.attr, 6675 &driver_attr_host_lock.attr, 6676 &driver_attr_ndelay.attr, 6677 &driver_attr_strict.attr, 6678 &driver_attr_uuid_ctl.attr, 6679 &driver_attr_cdb_len.attr, 6680 &driver_attr_tur_ms_to_ready.attr, 6681 &driver_attr_zbc.attr, 6682 NULL, 6683 }; 6684 ATTRIBUTE_GROUPS(sdebug_drv); 6685 6686 static struct device *pseudo_primary; 6687 6688 static int __init scsi_debug_init(void) 6689 { 6690 bool want_store = (sdebug_fake_rw == 0); 6691 unsigned long sz; 6692 int k, ret, hosts_to_add; 6693 int idx = -1; 6694 6695 ramdisk_lck_a[0] = &atomic_rw; 6696 ramdisk_lck_a[1] = &atomic_rw2; 6697 atomic_set(&retired_max_queue, 0); 6698 6699 if (sdebug_ndelay >= 1000 * 1000 * 1000) { 6700 pr_warn("ndelay must be less than 1 second, ignored\n"); 6701 sdebug_ndelay = 0; 6702 } else if (sdebug_ndelay > 0) 6703 sdebug_jdelay = JDELAY_OVERRIDDEN; 6704 6705 switch (sdebug_sector_size) { 6706 case 512: 6707 case 1024: 6708 case 2048: 6709 case 4096: 6710 break; 6711 default: 6712 pr_err("invalid sector_size %d\n", sdebug_sector_size); 6713 return -EINVAL; 6714 } 6715 6716 switch (sdebug_dif) { 6717 case T10_PI_TYPE0_PROTECTION: 6718 break; 6719 case T10_PI_TYPE1_PROTECTION: 6720 case T10_PI_TYPE2_PROTECTION: 6721 case T10_PI_TYPE3_PROTECTION: 6722 have_dif_prot = true; 6723 break; 6724 6725 default: 6726 pr_err("dif must be 0, 1, 2 or 3\n"); 6727 return -EINVAL; 6728 } 6729 6730 if (sdebug_num_tgts < 0) { 6731 pr_err("num_tgts must be >= 0\n"); 6732 return -EINVAL; 6733 } 6734 6735 if (sdebug_guard > 1) { 6736 pr_err("guard must be 0 or 1\n"); 6737 return -EINVAL; 6738 } 6739 6740 if (sdebug_ato > 1) { 6741 pr_err("ato must be 0 or 1\n"); 6742 return -EINVAL; 6743 } 6744 6745 if (sdebug_physblk_exp > 15) { 6746 pr_err("invalid physblk_exp %u\n", sdebug_physblk_exp); 6747 return -EINVAL; 6748 } 6749 6750 sdebug_lun_am = sdebug_lun_am_i; 6751 if (sdebug_lun_am > SAM_LUN_AM_FLAT) { 6752 pr_warn("Invalid LUN format %u, using default\n", (int)sdebug_lun_am); 6753 sdebug_lun_am = SAM_LUN_AM_PERIPHERAL; 6754 } 6755 6756 if (sdebug_max_luns > 256) { 6757 if (sdebug_max_luns > 16384) { 6758 pr_warn("max_luns can be no more than 16384, use default\n"); 6759 sdebug_max_luns = DEF_MAX_LUNS; 6760 } 6761 sdebug_lun_am = SAM_LUN_AM_FLAT; 6762 } 6763 6764 if (sdebug_lowest_aligned > 0x3fff) { 6765 pr_err("lowest_aligned too big: %u\n", sdebug_lowest_aligned); 6766 return -EINVAL; 6767 } 6768 6769 if (submit_queues < 1) { 6770 pr_err("submit_queues must be 1 or more\n"); 6771 return -EINVAL; 6772 } 6773 6774 if ((sdebug_max_queue > SDEBUG_CANQUEUE) || (sdebug_max_queue < 1)) { 6775 pr_err("max_queue must be in range [1, %d]\n", SDEBUG_CANQUEUE); 6776 return -EINVAL; 6777 } 6778 6779 if ((sdebug_host_max_queue > SDEBUG_CANQUEUE) || 6780 (sdebug_host_max_queue < 0)) { 6781 pr_err("host_max_queue must be in range [0 %d]\n", 6782 SDEBUG_CANQUEUE); 6783 return -EINVAL; 6784 } 6785 6786 if (sdebug_host_max_queue && 6787 (sdebug_max_queue != sdebug_host_max_queue)) { 6788 sdebug_max_queue = sdebug_host_max_queue; 6789 pr_warn("fixing max submit queue depth to host max queue depth, %d\n", 6790 sdebug_max_queue); 6791 } 6792 6793 sdebug_q_arr = kcalloc(submit_queues, sizeof(struct sdebug_queue), 6794 GFP_KERNEL); 6795 if (sdebug_q_arr == NULL) 6796 return -ENOMEM; 6797 for (k = 0; k < submit_queues; ++k) 6798 spin_lock_init(&sdebug_q_arr[k].qc_lock); 6799 6800 /* 6801 * check for host managed zoned block device specified with 6802 * ptype=0x14 or zbc=XXX. 6803 */ 6804 if (sdebug_ptype == TYPE_ZBC) { 6805 sdeb_zbc_model = BLK_ZONED_HM; 6806 } else if (sdeb_zbc_model_s && *sdeb_zbc_model_s) { 6807 k = sdeb_zbc_model_str(sdeb_zbc_model_s); 6808 if (k < 0) { 6809 ret = k; 6810 goto free_q_arr; 6811 } 6812 sdeb_zbc_model = k; 6813 switch (sdeb_zbc_model) { 6814 case BLK_ZONED_NONE: 6815 case BLK_ZONED_HA: 6816 sdebug_ptype = TYPE_DISK; 6817 break; 6818 case BLK_ZONED_HM: 6819 sdebug_ptype = TYPE_ZBC; 6820 break; 6821 default: 6822 pr_err("Invalid ZBC model\n"); 6823 ret = -EINVAL; 6824 goto free_q_arr; 6825 } 6826 } 6827 if (sdeb_zbc_model != BLK_ZONED_NONE) { 6828 sdeb_zbc_in_use = true; 6829 if (sdebug_dev_size_mb == DEF_DEV_SIZE_PRE_INIT) 6830 sdebug_dev_size_mb = DEF_ZBC_DEV_SIZE_MB; 6831 } 6832 6833 if (sdebug_dev_size_mb == DEF_DEV_SIZE_PRE_INIT) 6834 sdebug_dev_size_mb = DEF_DEV_SIZE_MB; 6835 if (sdebug_dev_size_mb < 1) 6836 sdebug_dev_size_mb = 1; /* force minimum 1 MB ramdisk */ 6837 sz = (unsigned long)sdebug_dev_size_mb * 1048576; 6838 sdebug_store_sectors = sz / sdebug_sector_size; 6839 sdebug_capacity = get_sdebug_capacity(); 6840 6841 /* play around with geometry, don't waste too much on track 0 */ 6842 sdebug_heads = 8; 6843 sdebug_sectors_per = 32; 6844 if (sdebug_dev_size_mb >= 256) 6845 sdebug_heads = 64; 6846 else if (sdebug_dev_size_mb >= 16) 6847 sdebug_heads = 32; 6848 sdebug_cylinders_per = (unsigned long)sdebug_capacity / 6849 (sdebug_sectors_per * sdebug_heads); 6850 if (sdebug_cylinders_per >= 1024) { 6851 /* other LLDs do this; implies >= 1GB ram disk ... */ 6852 sdebug_heads = 255; 6853 sdebug_sectors_per = 63; 6854 sdebug_cylinders_per = (unsigned long)sdebug_capacity / 6855 (sdebug_sectors_per * sdebug_heads); 6856 } 6857 if (scsi_debug_lbp()) { 6858 sdebug_unmap_max_blocks = 6859 clamp(sdebug_unmap_max_blocks, 0U, 0xffffffffU); 6860 6861 sdebug_unmap_max_desc = 6862 clamp(sdebug_unmap_max_desc, 0U, 256U); 6863 6864 sdebug_unmap_granularity = 6865 clamp(sdebug_unmap_granularity, 1U, 0xffffffffU); 6866 6867 if (sdebug_unmap_alignment && 6868 sdebug_unmap_granularity <= 6869 sdebug_unmap_alignment) { 6870 pr_err("ERR: unmap_granularity <= unmap_alignment\n"); 6871 ret = -EINVAL; 6872 goto free_q_arr; 6873 } 6874 } 6875 xa_init_flags(per_store_ap, XA_FLAGS_ALLOC | XA_FLAGS_LOCK_IRQ); 6876 if (want_store) { 6877 idx = sdebug_add_store(); 6878 if (idx < 0) { 6879 ret = idx; 6880 goto free_q_arr; 6881 } 6882 } 6883 6884 pseudo_primary = root_device_register("pseudo_0"); 6885 if (IS_ERR(pseudo_primary)) { 6886 pr_warn("root_device_register() error\n"); 6887 ret = PTR_ERR(pseudo_primary); 6888 goto free_vm; 6889 } 6890 ret = bus_register(&pseudo_lld_bus); 6891 if (ret < 0) { 6892 pr_warn("bus_register error: %d\n", ret); 6893 goto dev_unreg; 6894 } 6895 ret = driver_register(&sdebug_driverfs_driver); 6896 if (ret < 0) { 6897 pr_warn("driver_register error: %d\n", ret); 6898 goto bus_unreg; 6899 } 6900 6901 hosts_to_add = sdebug_add_host; 6902 sdebug_add_host = 0; 6903 6904 for (k = 0; k < hosts_to_add; k++) { 6905 if (want_store && k == 0) { 6906 ret = sdebug_add_host_helper(idx); 6907 if (ret < 0) { 6908 pr_err("add_host_helper k=%d, error=%d\n", 6909 k, -ret); 6910 break; 6911 } 6912 } else { 6913 ret = sdebug_do_add_host(want_store && 6914 sdebug_per_host_store); 6915 if (ret < 0) { 6916 pr_err("add_host k=%d error=%d\n", k, -ret); 6917 break; 6918 } 6919 } 6920 } 6921 if (sdebug_verbose) 6922 pr_info("built %d host(s)\n", sdebug_num_hosts); 6923 6924 return 0; 6925 6926 bus_unreg: 6927 bus_unregister(&pseudo_lld_bus); 6928 dev_unreg: 6929 root_device_unregister(pseudo_primary); 6930 free_vm: 6931 sdebug_erase_store(idx, NULL); 6932 free_q_arr: 6933 kfree(sdebug_q_arr); 6934 return ret; 6935 } 6936 6937 static void __exit scsi_debug_exit(void) 6938 { 6939 int k = sdebug_num_hosts; 6940 6941 stop_all_queued(); 6942 for (; k; k--) 6943 sdebug_do_remove_host(true); 6944 free_all_queued(); 6945 driver_unregister(&sdebug_driverfs_driver); 6946 bus_unregister(&pseudo_lld_bus); 6947 root_device_unregister(pseudo_primary); 6948 6949 sdebug_erase_all_stores(false); 6950 xa_destroy(per_store_ap); 6951 kfree(sdebug_q_arr); 6952 } 6953 6954 device_initcall(scsi_debug_init); 6955 module_exit(scsi_debug_exit); 6956 6957 static void sdebug_release_adapter(struct device *dev) 6958 { 6959 struct sdebug_host_info *sdbg_host; 6960 6961 sdbg_host = to_sdebug_host(dev); 6962 kfree(sdbg_host); 6963 } 6964 6965 /* idx must be valid, if sip is NULL then it will be obtained using idx */ 6966 static void sdebug_erase_store(int idx, struct sdeb_store_info *sip) 6967 { 6968 if (idx < 0) 6969 return; 6970 if (!sip) { 6971 if (xa_empty(per_store_ap)) 6972 return; 6973 sip = xa_load(per_store_ap, idx); 6974 if (!sip) 6975 return; 6976 } 6977 vfree(sip->map_storep); 6978 vfree(sip->dif_storep); 6979 vfree(sip->storep); 6980 xa_erase(per_store_ap, idx); 6981 kfree(sip); 6982 } 6983 6984 /* Assume apart_from_first==false only in shutdown case. */ 6985 static void sdebug_erase_all_stores(bool apart_from_first) 6986 { 6987 unsigned long idx; 6988 struct sdeb_store_info *sip = NULL; 6989 6990 xa_for_each(per_store_ap, idx, sip) { 6991 if (apart_from_first) 6992 apart_from_first = false; 6993 else 6994 sdebug_erase_store(idx, sip); 6995 } 6996 if (apart_from_first) 6997 sdeb_most_recent_idx = sdeb_first_idx; 6998 } 6999 7000 /* 7001 * Returns store xarray new element index (idx) if >=0 else negated errno. 7002 * Limit the number of stores to 65536. 7003 */ 7004 static int sdebug_add_store(void) 7005 { 7006 int res; 7007 u32 n_idx; 7008 unsigned long iflags; 7009 unsigned long sz = (unsigned long)sdebug_dev_size_mb * 1048576; 7010 struct sdeb_store_info *sip = NULL; 7011 struct xa_limit xal = { .max = 1 << 16, .min = 0 }; 7012 7013 sip = kzalloc(sizeof(*sip), GFP_KERNEL); 7014 if (!sip) 7015 return -ENOMEM; 7016 7017 xa_lock_irqsave(per_store_ap, iflags); 7018 res = __xa_alloc(per_store_ap, &n_idx, sip, xal, GFP_ATOMIC); 7019 if (unlikely(res < 0)) { 7020 xa_unlock_irqrestore(per_store_ap, iflags); 7021 kfree(sip); 7022 pr_warn("%s: xa_alloc() errno=%d\n", __func__, -res); 7023 return res; 7024 } 7025 sdeb_most_recent_idx = n_idx; 7026 if (sdeb_first_idx < 0) 7027 sdeb_first_idx = n_idx; 7028 xa_unlock_irqrestore(per_store_ap, iflags); 7029 7030 res = -ENOMEM; 7031 sip->storep = vzalloc(sz); 7032 if (!sip->storep) { 7033 pr_err("user data oom\n"); 7034 goto err; 7035 } 7036 if (sdebug_num_parts > 0) 7037 sdebug_build_parts(sip->storep, sz); 7038 7039 /* DIF/DIX: what T10 calls Protection Information (PI) */ 7040 if (sdebug_dix) { 7041 int dif_size; 7042 7043 dif_size = sdebug_store_sectors * sizeof(struct t10_pi_tuple); 7044 sip->dif_storep = vmalloc(dif_size); 7045 7046 pr_info("dif_storep %u bytes @ %pK\n", dif_size, 7047 sip->dif_storep); 7048 7049 if (!sip->dif_storep) { 7050 pr_err("DIX oom\n"); 7051 goto err; 7052 } 7053 memset(sip->dif_storep, 0xff, dif_size); 7054 } 7055 /* Logical Block Provisioning */ 7056 if (scsi_debug_lbp()) { 7057 map_size = lba_to_map_index(sdebug_store_sectors - 1) + 1; 7058 sip->map_storep = vmalloc(array_size(sizeof(long), 7059 BITS_TO_LONGS(map_size))); 7060 7061 pr_info("%lu provisioning blocks\n", map_size); 7062 7063 if (!sip->map_storep) { 7064 pr_err("LBP map oom\n"); 7065 goto err; 7066 } 7067 7068 bitmap_zero(sip->map_storep, map_size); 7069 7070 /* Map first 1KB for partition table */ 7071 if (sdebug_num_parts) 7072 map_region(sip, 0, 2); 7073 } 7074 7075 rwlock_init(&sip->macc_lck); 7076 return (int)n_idx; 7077 err: 7078 sdebug_erase_store((int)n_idx, sip); 7079 pr_warn("%s: failed, errno=%d\n", __func__, -res); 7080 return res; 7081 } 7082 7083 static int sdebug_add_host_helper(int per_host_idx) 7084 { 7085 int k, devs_per_host, idx; 7086 int error = -ENOMEM; 7087 struct sdebug_host_info *sdbg_host; 7088 struct sdebug_dev_info *sdbg_devinfo, *tmp; 7089 7090 sdbg_host = kzalloc(sizeof(*sdbg_host), GFP_KERNEL); 7091 if (!sdbg_host) 7092 return -ENOMEM; 7093 idx = (per_host_idx < 0) ? sdeb_first_idx : per_host_idx; 7094 if (xa_get_mark(per_store_ap, idx, SDEB_XA_NOT_IN_USE)) 7095 xa_clear_mark(per_store_ap, idx, SDEB_XA_NOT_IN_USE); 7096 sdbg_host->si_idx = idx; 7097 7098 INIT_LIST_HEAD(&sdbg_host->dev_info_list); 7099 7100 devs_per_host = sdebug_num_tgts * sdebug_max_luns; 7101 for (k = 0; k < devs_per_host; k++) { 7102 sdbg_devinfo = sdebug_device_create(sdbg_host, GFP_KERNEL); 7103 if (!sdbg_devinfo) 7104 goto clean; 7105 } 7106 7107 spin_lock(&sdebug_host_list_lock); 7108 list_add_tail(&sdbg_host->host_list, &sdebug_host_list); 7109 spin_unlock(&sdebug_host_list_lock); 7110 7111 sdbg_host->dev.bus = &pseudo_lld_bus; 7112 sdbg_host->dev.parent = pseudo_primary; 7113 sdbg_host->dev.release = &sdebug_release_adapter; 7114 dev_set_name(&sdbg_host->dev, "adapter%d", sdebug_num_hosts); 7115 7116 error = device_register(&sdbg_host->dev); 7117 if (error) 7118 goto clean; 7119 7120 ++sdebug_num_hosts; 7121 return 0; 7122 7123 clean: 7124 list_for_each_entry_safe(sdbg_devinfo, tmp, &sdbg_host->dev_info_list, 7125 dev_list) { 7126 list_del(&sdbg_devinfo->dev_list); 7127 kfree(sdbg_devinfo->zstate); 7128 kfree(sdbg_devinfo); 7129 } 7130 kfree(sdbg_host); 7131 pr_warn("%s: failed, errno=%d\n", __func__, -error); 7132 return error; 7133 } 7134 7135 static int sdebug_do_add_host(bool mk_new_store) 7136 { 7137 int ph_idx = sdeb_most_recent_idx; 7138 7139 if (mk_new_store) { 7140 ph_idx = sdebug_add_store(); 7141 if (ph_idx < 0) 7142 return ph_idx; 7143 } 7144 return sdebug_add_host_helper(ph_idx); 7145 } 7146 7147 static void sdebug_do_remove_host(bool the_end) 7148 { 7149 int idx = -1; 7150 struct sdebug_host_info *sdbg_host = NULL; 7151 struct sdebug_host_info *sdbg_host2; 7152 7153 spin_lock(&sdebug_host_list_lock); 7154 if (!list_empty(&sdebug_host_list)) { 7155 sdbg_host = list_entry(sdebug_host_list.prev, 7156 struct sdebug_host_info, host_list); 7157 idx = sdbg_host->si_idx; 7158 } 7159 if (!the_end && idx >= 0) { 7160 bool unique = true; 7161 7162 list_for_each_entry(sdbg_host2, &sdebug_host_list, host_list) { 7163 if (sdbg_host2 == sdbg_host) 7164 continue; 7165 if (idx == sdbg_host2->si_idx) { 7166 unique = false; 7167 break; 7168 } 7169 } 7170 if (unique) { 7171 xa_set_mark(per_store_ap, idx, SDEB_XA_NOT_IN_USE); 7172 if (idx == sdeb_most_recent_idx) 7173 --sdeb_most_recent_idx; 7174 } 7175 } 7176 if (sdbg_host) 7177 list_del(&sdbg_host->host_list); 7178 spin_unlock(&sdebug_host_list_lock); 7179 7180 if (!sdbg_host) 7181 return; 7182 7183 device_unregister(&sdbg_host->dev); 7184 --sdebug_num_hosts; 7185 } 7186 7187 static int sdebug_change_qdepth(struct scsi_device *sdev, int qdepth) 7188 { 7189 int num_in_q = 0; 7190 struct sdebug_dev_info *devip; 7191 7192 block_unblock_all_queues(true); 7193 devip = (struct sdebug_dev_info *)sdev->hostdata; 7194 if (NULL == devip) { 7195 block_unblock_all_queues(false); 7196 return -ENODEV; 7197 } 7198 num_in_q = atomic_read(&devip->num_in_q); 7199 7200 if (qdepth > SDEBUG_CANQUEUE) { 7201 qdepth = SDEBUG_CANQUEUE; 7202 pr_warn("%s: requested qdepth [%d] exceeds canqueue [%d], trim\n", __func__, 7203 qdepth, SDEBUG_CANQUEUE); 7204 } 7205 if (qdepth < 1) 7206 qdepth = 1; 7207 if (qdepth != sdev->queue_depth) 7208 scsi_change_queue_depth(sdev, qdepth); 7209 7210 if (SDEBUG_OPT_Q_NOISE & sdebug_opts) { 7211 sdev_printk(KERN_INFO, sdev, "%s: qdepth=%d, num_in_q=%d\n", 7212 __func__, qdepth, num_in_q); 7213 } 7214 block_unblock_all_queues(false); 7215 return sdev->queue_depth; 7216 } 7217 7218 static bool fake_timeout(struct scsi_cmnd *scp) 7219 { 7220 if (0 == (atomic_read(&sdebug_cmnd_count) % abs(sdebug_every_nth))) { 7221 if (sdebug_every_nth < -1) 7222 sdebug_every_nth = -1; 7223 if (SDEBUG_OPT_TIMEOUT & sdebug_opts) 7224 return true; /* ignore command causing timeout */ 7225 else if (SDEBUG_OPT_MAC_TIMEOUT & sdebug_opts && 7226 scsi_medium_access_command(scp)) 7227 return true; /* time out reads and writes */ 7228 } 7229 return false; 7230 } 7231 7232 /* Response to TUR or media access command when device stopped */ 7233 static int resp_not_ready(struct scsi_cmnd *scp, struct sdebug_dev_info *devip) 7234 { 7235 int stopped_state; 7236 u64 diff_ns = 0; 7237 ktime_t now_ts = ktime_get_boottime(); 7238 struct scsi_device *sdp = scp->device; 7239 7240 stopped_state = atomic_read(&devip->stopped); 7241 if (stopped_state == 2) { 7242 if (ktime_to_ns(now_ts) > ktime_to_ns(devip->create_ts)) { 7243 diff_ns = ktime_to_ns(ktime_sub(now_ts, devip->create_ts)); 7244 if (diff_ns >= ((u64)sdeb_tur_ms_to_ready * 1000000)) { 7245 /* tur_ms_to_ready timer extinguished */ 7246 atomic_set(&devip->stopped, 0); 7247 return 0; 7248 } 7249 } 7250 mk_sense_buffer(scp, NOT_READY, LOGICAL_UNIT_NOT_READY, 0x1); 7251 if (sdebug_verbose) 7252 sdev_printk(KERN_INFO, sdp, 7253 "%s: Not ready: in process of becoming ready\n", my_name); 7254 if (scp->cmnd[0] == TEST_UNIT_READY) { 7255 u64 tur_nanosecs_to_ready = (u64)sdeb_tur_ms_to_ready * 1000000; 7256 7257 if (diff_ns <= tur_nanosecs_to_ready) 7258 diff_ns = tur_nanosecs_to_ready - diff_ns; 7259 else 7260 diff_ns = tur_nanosecs_to_ready; 7261 /* As per 20-061r2 approved for spc6 by T10 on 20200716 */ 7262 do_div(diff_ns, 1000000); /* diff_ns becomes milliseconds */ 7263 scsi_set_sense_information(scp->sense_buffer, SCSI_SENSE_BUFFERSIZE, 7264 diff_ns); 7265 return check_condition_result; 7266 } 7267 } 7268 mk_sense_buffer(scp, NOT_READY, LOGICAL_UNIT_NOT_READY, 0x2); 7269 if (sdebug_verbose) 7270 sdev_printk(KERN_INFO, sdp, "%s: Not ready: initializing command required\n", 7271 my_name); 7272 return check_condition_result; 7273 } 7274 7275 static int sdebug_map_queues(struct Scsi_Host *shost) 7276 { 7277 int i, qoff; 7278 7279 if (shost->nr_hw_queues == 1) 7280 return 0; 7281 7282 for (i = 0, qoff = 0; i < HCTX_MAX_TYPES; i++) { 7283 struct blk_mq_queue_map *map = &shost->tag_set.map[i]; 7284 7285 map->nr_queues = 0; 7286 7287 if (i == HCTX_TYPE_DEFAULT) 7288 map->nr_queues = submit_queues - poll_queues; 7289 else if (i == HCTX_TYPE_POLL) 7290 map->nr_queues = poll_queues; 7291 7292 if (!map->nr_queues) { 7293 BUG_ON(i == HCTX_TYPE_DEFAULT); 7294 continue; 7295 } 7296 7297 map->queue_offset = qoff; 7298 blk_mq_map_queues(map); 7299 7300 qoff += map->nr_queues; 7301 } 7302 7303 return 0; 7304 7305 } 7306 7307 static int sdebug_blk_mq_poll(struct Scsi_Host *shost, unsigned int queue_num) 7308 { 7309 bool first; 7310 bool retiring = false; 7311 int num_entries = 0; 7312 unsigned int qc_idx = 0; 7313 unsigned long iflags; 7314 ktime_t kt_from_boot = ktime_get_boottime(); 7315 struct sdebug_queue *sqp; 7316 struct sdebug_queued_cmd *sqcp; 7317 struct scsi_cmnd *scp; 7318 struct sdebug_dev_info *devip; 7319 struct sdebug_defer *sd_dp; 7320 7321 sqp = sdebug_q_arr + queue_num; 7322 spin_lock_irqsave(&sqp->qc_lock, iflags); 7323 7324 for (first = true; first || qc_idx + 1 < sdebug_max_queue; ) { 7325 if (first) { 7326 qc_idx = find_first_bit(sqp->in_use_bm, sdebug_max_queue); 7327 first = false; 7328 } else { 7329 qc_idx = find_next_bit(sqp->in_use_bm, sdebug_max_queue, qc_idx + 1); 7330 } 7331 if (unlikely(qc_idx >= sdebug_max_queue)) 7332 break; 7333 7334 sqcp = &sqp->qc_arr[qc_idx]; 7335 sd_dp = sqcp->sd_dp; 7336 if (unlikely(!sd_dp)) 7337 continue; 7338 scp = sqcp->a_cmnd; 7339 if (unlikely(scp == NULL)) { 7340 pr_err("scp is NULL, queue_num=%d, qc_idx=%u from %s\n", 7341 queue_num, qc_idx, __func__); 7342 break; 7343 } 7344 if (sd_dp->defer_t == SDEB_DEFER_POLL) { 7345 if (kt_from_boot < sd_dp->cmpl_ts) 7346 continue; 7347 7348 } else /* ignoring non REQ_POLLED requests */ 7349 continue; 7350 devip = (struct sdebug_dev_info *)scp->device->hostdata; 7351 if (likely(devip)) 7352 atomic_dec(&devip->num_in_q); 7353 else 7354 pr_err("devip=NULL from %s\n", __func__); 7355 if (unlikely(atomic_read(&retired_max_queue) > 0)) 7356 retiring = true; 7357 7358 sqcp->a_cmnd = NULL; 7359 if (unlikely(!test_and_clear_bit(qc_idx, sqp->in_use_bm))) { 7360 pr_err("Unexpected completion sqp %p queue_num=%d qc_idx=%u from %s\n", 7361 sqp, queue_num, qc_idx, __func__); 7362 break; 7363 } 7364 if (unlikely(retiring)) { /* user has reduced max_queue */ 7365 int k, retval; 7366 7367 retval = atomic_read(&retired_max_queue); 7368 if (qc_idx >= retval) { 7369 pr_err("index %d too large\n", retval); 7370 break; 7371 } 7372 k = find_last_bit(sqp->in_use_bm, retval); 7373 if ((k < sdebug_max_queue) || (k == retval)) 7374 atomic_set(&retired_max_queue, 0); 7375 else 7376 atomic_set(&retired_max_queue, k + 1); 7377 } 7378 sd_dp->defer_t = SDEB_DEFER_NONE; 7379 spin_unlock_irqrestore(&sqp->qc_lock, iflags); 7380 scsi_done(scp); /* callback to mid level */ 7381 spin_lock_irqsave(&sqp->qc_lock, iflags); 7382 num_entries++; 7383 } 7384 spin_unlock_irqrestore(&sqp->qc_lock, iflags); 7385 if (num_entries > 0) 7386 atomic_add(num_entries, &sdeb_mq_poll_count); 7387 return num_entries; 7388 } 7389 7390 static int scsi_debug_queuecommand(struct Scsi_Host *shost, 7391 struct scsi_cmnd *scp) 7392 { 7393 u8 sdeb_i; 7394 struct scsi_device *sdp = scp->device; 7395 const struct opcode_info_t *oip; 7396 const struct opcode_info_t *r_oip; 7397 struct sdebug_dev_info *devip; 7398 u8 *cmd = scp->cmnd; 7399 int (*r_pfp)(struct scsi_cmnd *, struct sdebug_dev_info *); 7400 int (*pfp)(struct scsi_cmnd *, struct sdebug_dev_info *) = NULL; 7401 int k, na; 7402 int errsts = 0; 7403 u64 lun_index = sdp->lun & 0x3FFF; 7404 u32 flags; 7405 u16 sa; 7406 u8 opcode = cmd[0]; 7407 bool has_wlun_rl; 7408 bool inject_now; 7409 7410 scsi_set_resid(scp, 0); 7411 if (sdebug_statistics) { 7412 atomic_inc(&sdebug_cmnd_count); 7413 inject_now = inject_on_this_cmd(); 7414 } else { 7415 inject_now = false; 7416 } 7417 if (unlikely(sdebug_verbose && 7418 !(SDEBUG_OPT_NO_CDB_NOISE & sdebug_opts))) { 7419 char b[120]; 7420 int n, len, sb; 7421 7422 len = scp->cmd_len; 7423 sb = (int)sizeof(b); 7424 if (len > 32) 7425 strcpy(b, "too long, over 32 bytes"); 7426 else { 7427 for (k = 0, n = 0; k < len && n < sb; ++k) 7428 n += scnprintf(b + n, sb - n, "%02x ", 7429 (u32)cmd[k]); 7430 } 7431 sdev_printk(KERN_INFO, sdp, "%s: tag=%#x, cmd %s\n", my_name, 7432 blk_mq_unique_tag(scsi_cmd_to_rq(scp)), b); 7433 } 7434 if (unlikely(inject_now && (sdebug_opts & SDEBUG_OPT_HOST_BUSY))) 7435 return SCSI_MLQUEUE_HOST_BUSY; 7436 has_wlun_rl = (sdp->lun == SCSI_W_LUN_REPORT_LUNS); 7437 if (unlikely(lun_index >= sdebug_max_luns && !has_wlun_rl)) 7438 goto err_out; 7439 7440 sdeb_i = opcode_ind_arr[opcode]; /* fully mapped */ 7441 oip = &opcode_info_arr[sdeb_i]; /* safe if table consistent */ 7442 devip = (struct sdebug_dev_info *)sdp->hostdata; 7443 if (unlikely(!devip)) { 7444 devip = find_build_dev_info(sdp); 7445 if (NULL == devip) 7446 goto err_out; 7447 } 7448 if (unlikely(inject_now && !atomic_read(&sdeb_inject_pending))) 7449 atomic_set(&sdeb_inject_pending, 1); 7450 7451 na = oip->num_attached; 7452 r_pfp = oip->pfp; 7453 if (na) { /* multiple commands with this opcode */ 7454 r_oip = oip; 7455 if (FF_SA & r_oip->flags) { 7456 if (F_SA_LOW & oip->flags) 7457 sa = 0x1f & cmd[1]; 7458 else 7459 sa = get_unaligned_be16(cmd + 8); 7460 for (k = 0; k <= na; oip = r_oip->arrp + k++) { 7461 if (opcode == oip->opcode && sa == oip->sa) 7462 break; 7463 } 7464 } else { /* since no service action only check opcode */ 7465 for (k = 0; k <= na; oip = r_oip->arrp + k++) { 7466 if (opcode == oip->opcode) 7467 break; 7468 } 7469 } 7470 if (k > na) { 7471 if (F_SA_LOW & r_oip->flags) 7472 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 4); 7473 else if (F_SA_HIGH & r_oip->flags) 7474 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 8, 7); 7475 else 7476 mk_sense_invalid_opcode(scp); 7477 goto check_cond; 7478 } 7479 } /* else (when na==0) we assume the oip is a match */ 7480 flags = oip->flags; 7481 if (unlikely(F_INV_OP & flags)) { 7482 mk_sense_invalid_opcode(scp); 7483 goto check_cond; 7484 } 7485 if (unlikely(has_wlun_rl && !(F_RL_WLUN_OK & flags))) { 7486 if (sdebug_verbose) 7487 sdev_printk(KERN_INFO, sdp, "%s: Opcode 0x%x not%s\n", 7488 my_name, opcode, " supported for wlun"); 7489 mk_sense_invalid_opcode(scp); 7490 goto check_cond; 7491 } 7492 if (unlikely(sdebug_strict)) { /* check cdb against mask */ 7493 u8 rem; 7494 int j; 7495 7496 for (k = 1; k < oip->len_mask[0] && k < 16; ++k) { 7497 rem = ~oip->len_mask[k] & cmd[k]; 7498 if (rem) { 7499 for (j = 7; j >= 0; --j, rem <<= 1) { 7500 if (0x80 & rem) 7501 break; 7502 } 7503 mk_sense_invalid_fld(scp, SDEB_IN_CDB, k, j); 7504 goto check_cond; 7505 } 7506 } 7507 } 7508 if (unlikely(!(F_SKIP_UA & flags) && 7509 find_first_bit(devip->uas_bm, 7510 SDEBUG_NUM_UAS) != SDEBUG_NUM_UAS)) { 7511 errsts = make_ua(scp, devip); 7512 if (errsts) 7513 goto check_cond; 7514 } 7515 if (unlikely(((F_M_ACCESS & flags) || scp->cmnd[0] == TEST_UNIT_READY) && 7516 atomic_read(&devip->stopped))) { 7517 errsts = resp_not_ready(scp, devip); 7518 if (errsts) 7519 goto fini; 7520 } 7521 if (sdebug_fake_rw && (F_FAKE_RW & flags)) 7522 goto fini; 7523 if (unlikely(sdebug_every_nth)) { 7524 if (fake_timeout(scp)) 7525 return 0; /* ignore command: make trouble */ 7526 } 7527 if (likely(oip->pfp)) 7528 pfp = oip->pfp; /* calls a resp_* function */ 7529 else 7530 pfp = r_pfp; /* if leaf function ptr NULL, try the root's */ 7531 7532 fini: 7533 if (F_DELAY_OVERR & flags) /* cmds like INQUIRY respond asap */ 7534 return schedule_resp(scp, devip, errsts, pfp, 0, 0); 7535 else if ((flags & F_LONG_DELAY) && (sdebug_jdelay > 0 || 7536 sdebug_ndelay > 10000)) { 7537 /* 7538 * Skip long delays if ndelay <= 10 microseconds. Otherwise 7539 * for Start Stop Unit (SSU) want at least 1 second delay and 7540 * if sdebug_jdelay>1 want a long delay of that many seconds. 7541 * For Synchronize Cache want 1/20 of SSU's delay. 7542 */ 7543 int jdelay = (sdebug_jdelay < 2) ? 1 : sdebug_jdelay; 7544 int denom = (flags & F_SYNC_DELAY) ? 20 : 1; 7545 7546 jdelay = mult_frac(USER_HZ * jdelay, HZ, denom * USER_HZ); 7547 return schedule_resp(scp, devip, errsts, pfp, jdelay, 0); 7548 } else 7549 return schedule_resp(scp, devip, errsts, pfp, sdebug_jdelay, 7550 sdebug_ndelay); 7551 check_cond: 7552 return schedule_resp(scp, devip, check_condition_result, NULL, 0, 0); 7553 err_out: 7554 return schedule_resp(scp, NULL, DID_NO_CONNECT << 16, NULL, 0, 0); 7555 } 7556 7557 static struct scsi_host_template sdebug_driver_template = { 7558 .show_info = scsi_debug_show_info, 7559 .write_info = scsi_debug_write_info, 7560 .proc_name = sdebug_proc_name, 7561 .name = "SCSI DEBUG", 7562 .info = scsi_debug_info, 7563 .slave_alloc = scsi_debug_slave_alloc, 7564 .slave_configure = scsi_debug_slave_configure, 7565 .slave_destroy = scsi_debug_slave_destroy, 7566 .ioctl = scsi_debug_ioctl, 7567 .queuecommand = scsi_debug_queuecommand, 7568 .change_queue_depth = sdebug_change_qdepth, 7569 .map_queues = sdebug_map_queues, 7570 .mq_poll = sdebug_blk_mq_poll, 7571 .eh_abort_handler = scsi_debug_abort, 7572 .eh_device_reset_handler = scsi_debug_device_reset, 7573 .eh_target_reset_handler = scsi_debug_target_reset, 7574 .eh_bus_reset_handler = scsi_debug_bus_reset, 7575 .eh_host_reset_handler = scsi_debug_host_reset, 7576 .can_queue = SDEBUG_CANQUEUE, 7577 .this_id = 7, 7578 .sg_tablesize = SG_MAX_SEGMENTS, 7579 .cmd_per_lun = DEF_CMD_PER_LUN, 7580 .max_sectors = -1U, 7581 .max_segment_size = -1U, 7582 .module = THIS_MODULE, 7583 .track_queue_depth = 1, 7584 }; 7585 7586 static int sdebug_driver_probe(struct device *dev) 7587 { 7588 int error = 0; 7589 struct sdebug_host_info *sdbg_host; 7590 struct Scsi_Host *hpnt; 7591 int hprot; 7592 7593 sdbg_host = to_sdebug_host(dev); 7594 7595 sdebug_driver_template.can_queue = sdebug_max_queue; 7596 sdebug_driver_template.cmd_per_lun = sdebug_max_queue; 7597 if (!sdebug_clustering) 7598 sdebug_driver_template.dma_boundary = PAGE_SIZE - 1; 7599 7600 hpnt = scsi_host_alloc(&sdebug_driver_template, sizeof(sdbg_host)); 7601 if (NULL == hpnt) { 7602 pr_err("scsi_host_alloc failed\n"); 7603 error = -ENODEV; 7604 return error; 7605 } 7606 if (submit_queues > nr_cpu_ids) { 7607 pr_warn("%s: trim submit_queues (was %d) to nr_cpu_ids=%u\n", 7608 my_name, submit_queues, nr_cpu_ids); 7609 submit_queues = nr_cpu_ids; 7610 } 7611 /* 7612 * Decide whether to tell scsi subsystem that we want mq. The 7613 * following should give the same answer for each host. 7614 */ 7615 hpnt->nr_hw_queues = submit_queues; 7616 if (sdebug_host_max_queue) 7617 hpnt->host_tagset = 1; 7618 7619 /* poll queues are possible for nr_hw_queues > 1 */ 7620 if (hpnt->nr_hw_queues == 1 || (poll_queues < 1)) { 7621 pr_warn("%s: trim poll_queues to 0. poll_q/nr_hw = (%d/%d)\n", 7622 my_name, poll_queues, hpnt->nr_hw_queues); 7623 poll_queues = 0; 7624 } 7625 7626 /* 7627 * Poll queues don't need interrupts, but we need at least one I/O queue 7628 * left over for non-polled I/O. 7629 * If condition not met, trim poll_queues to 1 (just for simplicity). 7630 */ 7631 if (poll_queues >= submit_queues) { 7632 if (submit_queues < 3) 7633 pr_warn("%s: trim poll_queues to 1\n", my_name); 7634 else 7635 pr_warn("%s: trim poll_queues to 1. Perhaps try poll_queues=%d\n", 7636 my_name, submit_queues - 1); 7637 poll_queues = 1; 7638 } 7639 if (poll_queues) 7640 hpnt->nr_maps = 3; 7641 7642 sdbg_host->shost = hpnt; 7643 *((struct sdebug_host_info **)hpnt->hostdata) = sdbg_host; 7644 if ((hpnt->this_id >= 0) && (sdebug_num_tgts > hpnt->this_id)) 7645 hpnt->max_id = sdebug_num_tgts + 1; 7646 else 7647 hpnt->max_id = sdebug_num_tgts; 7648 /* = sdebug_max_luns; */ 7649 hpnt->max_lun = SCSI_W_LUN_REPORT_LUNS + 1; 7650 7651 hprot = 0; 7652 7653 switch (sdebug_dif) { 7654 7655 case T10_PI_TYPE1_PROTECTION: 7656 hprot = SHOST_DIF_TYPE1_PROTECTION; 7657 if (sdebug_dix) 7658 hprot |= SHOST_DIX_TYPE1_PROTECTION; 7659 break; 7660 7661 case T10_PI_TYPE2_PROTECTION: 7662 hprot = SHOST_DIF_TYPE2_PROTECTION; 7663 if (sdebug_dix) 7664 hprot |= SHOST_DIX_TYPE2_PROTECTION; 7665 break; 7666 7667 case T10_PI_TYPE3_PROTECTION: 7668 hprot = SHOST_DIF_TYPE3_PROTECTION; 7669 if (sdebug_dix) 7670 hprot |= SHOST_DIX_TYPE3_PROTECTION; 7671 break; 7672 7673 default: 7674 if (sdebug_dix) 7675 hprot |= SHOST_DIX_TYPE0_PROTECTION; 7676 break; 7677 } 7678 7679 scsi_host_set_prot(hpnt, hprot); 7680 7681 if (have_dif_prot || sdebug_dix) 7682 pr_info("host protection%s%s%s%s%s%s%s\n", 7683 (hprot & SHOST_DIF_TYPE1_PROTECTION) ? " DIF1" : "", 7684 (hprot & SHOST_DIF_TYPE2_PROTECTION) ? " DIF2" : "", 7685 (hprot & SHOST_DIF_TYPE3_PROTECTION) ? " DIF3" : "", 7686 (hprot & SHOST_DIX_TYPE0_PROTECTION) ? " DIX0" : "", 7687 (hprot & SHOST_DIX_TYPE1_PROTECTION) ? " DIX1" : "", 7688 (hprot & SHOST_DIX_TYPE2_PROTECTION) ? " DIX2" : "", 7689 (hprot & SHOST_DIX_TYPE3_PROTECTION) ? " DIX3" : ""); 7690 7691 if (sdebug_guard == 1) 7692 scsi_host_set_guard(hpnt, SHOST_DIX_GUARD_IP); 7693 else 7694 scsi_host_set_guard(hpnt, SHOST_DIX_GUARD_CRC); 7695 7696 sdebug_verbose = !!(SDEBUG_OPT_NOISE & sdebug_opts); 7697 sdebug_any_injecting_opt = !!(SDEBUG_OPT_ALL_INJECTING & sdebug_opts); 7698 if (sdebug_every_nth) /* need stats counters for every_nth */ 7699 sdebug_statistics = true; 7700 error = scsi_add_host(hpnt, &sdbg_host->dev); 7701 if (error) { 7702 pr_err("scsi_add_host failed\n"); 7703 error = -ENODEV; 7704 scsi_host_put(hpnt); 7705 } else { 7706 scsi_scan_host(hpnt); 7707 } 7708 7709 return error; 7710 } 7711 7712 static void sdebug_driver_remove(struct device *dev) 7713 { 7714 struct sdebug_host_info *sdbg_host; 7715 struct sdebug_dev_info *sdbg_devinfo, *tmp; 7716 7717 sdbg_host = to_sdebug_host(dev); 7718 7719 scsi_remove_host(sdbg_host->shost); 7720 7721 list_for_each_entry_safe(sdbg_devinfo, tmp, &sdbg_host->dev_info_list, 7722 dev_list) { 7723 list_del(&sdbg_devinfo->dev_list); 7724 kfree(sdbg_devinfo->zstate); 7725 kfree(sdbg_devinfo); 7726 } 7727 7728 scsi_host_put(sdbg_host->shost); 7729 } 7730 7731 static int pseudo_lld_bus_match(struct device *dev, 7732 struct device_driver *dev_driver) 7733 { 7734 return 1; 7735 } 7736 7737 static struct bus_type pseudo_lld_bus = { 7738 .name = "pseudo", 7739 .match = pseudo_lld_bus_match, 7740 .probe = sdebug_driver_probe, 7741 .remove = sdebug_driver_remove, 7742 .drv_groups = sdebug_drv_groups, 7743 }; 7744