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