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 (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION; 855 856 static const int illegal_condition_result = 857 (DRIVER_SENSE << 24) | (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 int 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(int, 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 n, ret, alen, rlen; 1900 int port_group_a, port_group_b, port_a, port_b; 1901 1902 alen = get_unaligned_be32(cmd + 6); 1903 arr = kzalloc(SDEBUG_MAX_TGTPGS_ARR_SZ, GFP_ATOMIC); 1904 if (! arr) 1905 return DID_REQUEUE << 16; 1906 /* 1907 * EVPD page 0x88 states we have two ports, one 1908 * real and a fake port with no device connected. 1909 * So we create two port groups with one port each 1910 * and set the group with port B to unavailable. 1911 */ 1912 port_a = 0x1; /* relative port A */ 1913 port_b = 0x2; /* relative port B */ 1914 port_group_a = (((host_no + 1) & 0x7f) << 8) + 1915 (devip->channel & 0x7f); 1916 port_group_b = (((host_no + 1) & 0x7f) << 8) + 1917 (devip->channel & 0x7f) + 0x80; 1918 1919 /* 1920 * The asymmetric access state is cycled according to the host_id. 1921 */ 1922 n = 4; 1923 if (sdebug_vpd_use_hostno == 0) { 1924 arr[n++] = host_no % 3; /* Asymm access state */ 1925 arr[n++] = 0x0F; /* claim: all states are supported */ 1926 } else { 1927 arr[n++] = 0x0; /* Active/Optimized path */ 1928 arr[n++] = 0x01; /* only support active/optimized paths */ 1929 } 1930 put_unaligned_be16(port_group_a, arr + n); 1931 n += 2; 1932 arr[n++] = 0; /* Reserved */ 1933 arr[n++] = 0; /* Status code */ 1934 arr[n++] = 0; /* Vendor unique */ 1935 arr[n++] = 0x1; /* One port per group */ 1936 arr[n++] = 0; /* Reserved */ 1937 arr[n++] = 0; /* Reserved */ 1938 put_unaligned_be16(port_a, arr + n); 1939 n += 2; 1940 arr[n++] = 3; /* Port unavailable */ 1941 arr[n++] = 0x08; /* claim: only unavailalbe paths are supported */ 1942 put_unaligned_be16(port_group_b, arr + n); 1943 n += 2; 1944 arr[n++] = 0; /* Reserved */ 1945 arr[n++] = 0; /* Status code */ 1946 arr[n++] = 0; /* Vendor unique */ 1947 arr[n++] = 0x1; /* One port per group */ 1948 arr[n++] = 0; /* Reserved */ 1949 arr[n++] = 0; /* Reserved */ 1950 put_unaligned_be16(port_b, arr + n); 1951 n += 2; 1952 1953 rlen = n - 4; 1954 put_unaligned_be32(rlen, arr + 0); 1955 1956 /* 1957 * Return the smallest value of either 1958 * - The allocated length 1959 * - The constructed command length 1960 * - The maximum array size 1961 */ 1962 rlen = min_t(int, alen, n); 1963 ret = fill_from_dev_buffer(scp, arr, 1964 min_t(int, rlen, SDEBUG_MAX_TGTPGS_ARR_SZ)); 1965 kfree(arr); 1966 return ret; 1967 } 1968 1969 static int resp_rsup_opcodes(struct scsi_cmnd *scp, 1970 struct sdebug_dev_info *devip) 1971 { 1972 bool rctd; 1973 u8 reporting_opts, req_opcode, sdeb_i, supp; 1974 u16 req_sa, u; 1975 u32 alloc_len, a_len; 1976 int k, offset, len, errsts, count, bump, na; 1977 const struct opcode_info_t *oip; 1978 const struct opcode_info_t *r_oip; 1979 u8 *arr; 1980 u8 *cmd = scp->cmnd; 1981 1982 rctd = !!(cmd[2] & 0x80); 1983 reporting_opts = cmd[2] & 0x7; 1984 req_opcode = cmd[3]; 1985 req_sa = get_unaligned_be16(cmd + 4); 1986 alloc_len = get_unaligned_be32(cmd + 6); 1987 if (alloc_len < 4 || alloc_len > 0xffff) { 1988 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 6, -1); 1989 return check_condition_result; 1990 } 1991 if (alloc_len > 8192) 1992 a_len = 8192; 1993 else 1994 a_len = alloc_len; 1995 arr = kzalloc((a_len < 256) ? 320 : a_len + 64, GFP_ATOMIC); 1996 if (NULL == arr) { 1997 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC, 1998 INSUFF_RES_ASCQ); 1999 return check_condition_result; 2000 } 2001 switch (reporting_opts) { 2002 case 0: /* all commands */ 2003 /* count number of commands */ 2004 for (count = 0, oip = opcode_info_arr; 2005 oip->num_attached != 0xff; ++oip) { 2006 if (F_INV_OP & oip->flags) 2007 continue; 2008 count += (oip->num_attached + 1); 2009 } 2010 bump = rctd ? 20 : 8; 2011 put_unaligned_be32(count * bump, arr); 2012 for (offset = 4, oip = opcode_info_arr; 2013 oip->num_attached != 0xff && offset < a_len; ++oip) { 2014 if (F_INV_OP & oip->flags) 2015 continue; 2016 na = oip->num_attached; 2017 arr[offset] = oip->opcode; 2018 put_unaligned_be16(oip->sa, arr + offset + 2); 2019 if (rctd) 2020 arr[offset + 5] |= 0x2; 2021 if (FF_SA & oip->flags) 2022 arr[offset + 5] |= 0x1; 2023 put_unaligned_be16(oip->len_mask[0], arr + offset + 6); 2024 if (rctd) 2025 put_unaligned_be16(0xa, arr + offset + 8); 2026 r_oip = oip; 2027 for (k = 0, oip = oip->arrp; k < na; ++k, ++oip) { 2028 if (F_INV_OP & oip->flags) 2029 continue; 2030 offset += bump; 2031 arr[offset] = oip->opcode; 2032 put_unaligned_be16(oip->sa, arr + offset + 2); 2033 if (rctd) 2034 arr[offset + 5] |= 0x2; 2035 if (FF_SA & oip->flags) 2036 arr[offset + 5] |= 0x1; 2037 put_unaligned_be16(oip->len_mask[0], 2038 arr + offset + 6); 2039 if (rctd) 2040 put_unaligned_be16(0xa, 2041 arr + offset + 8); 2042 } 2043 oip = r_oip; 2044 offset += bump; 2045 } 2046 break; 2047 case 1: /* one command: opcode only */ 2048 case 2: /* one command: opcode plus service action */ 2049 case 3: /* one command: if sa==0 then opcode only else opcode+sa */ 2050 sdeb_i = opcode_ind_arr[req_opcode]; 2051 oip = &opcode_info_arr[sdeb_i]; 2052 if (F_INV_OP & oip->flags) { 2053 supp = 1; 2054 offset = 4; 2055 } else { 2056 if (1 == reporting_opts) { 2057 if (FF_SA & oip->flags) { 2058 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2059 2, 2); 2060 kfree(arr); 2061 return check_condition_result; 2062 } 2063 req_sa = 0; 2064 } else if (2 == reporting_opts && 2065 0 == (FF_SA & oip->flags)) { 2066 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 4, -1); 2067 kfree(arr); /* point at requested sa */ 2068 return check_condition_result; 2069 } 2070 if (0 == (FF_SA & oip->flags) && 2071 req_opcode == oip->opcode) 2072 supp = 3; 2073 else if (0 == (FF_SA & oip->flags)) { 2074 na = oip->num_attached; 2075 for (k = 0, oip = oip->arrp; k < na; 2076 ++k, ++oip) { 2077 if (req_opcode == oip->opcode) 2078 break; 2079 } 2080 supp = (k >= na) ? 1 : 3; 2081 } else if (req_sa != oip->sa) { 2082 na = oip->num_attached; 2083 for (k = 0, oip = oip->arrp; k < na; 2084 ++k, ++oip) { 2085 if (req_sa == oip->sa) 2086 break; 2087 } 2088 supp = (k >= na) ? 1 : 3; 2089 } else 2090 supp = 3; 2091 if (3 == supp) { 2092 u = oip->len_mask[0]; 2093 put_unaligned_be16(u, arr + 2); 2094 arr[4] = oip->opcode; 2095 for (k = 1; k < u; ++k) 2096 arr[4 + k] = (k < 16) ? 2097 oip->len_mask[k] : 0xff; 2098 offset = 4 + u; 2099 } else 2100 offset = 4; 2101 } 2102 arr[1] = (rctd ? 0x80 : 0) | supp; 2103 if (rctd) { 2104 put_unaligned_be16(0xa, arr + offset); 2105 offset += 12; 2106 } 2107 break; 2108 default: 2109 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 2); 2110 kfree(arr); 2111 return check_condition_result; 2112 } 2113 offset = (offset < a_len) ? offset : a_len; 2114 len = (offset < alloc_len) ? offset : alloc_len; 2115 errsts = fill_from_dev_buffer(scp, arr, len); 2116 kfree(arr); 2117 return errsts; 2118 } 2119 2120 static int resp_rsup_tmfs(struct scsi_cmnd *scp, 2121 struct sdebug_dev_info *devip) 2122 { 2123 bool repd; 2124 u32 alloc_len, len; 2125 u8 arr[16]; 2126 u8 *cmd = scp->cmnd; 2127 2128 memset(arr, 0, sizeof(arr)); 2129 repd = !!(cmd[2] & 0x80); 2130 alloc_len = get_unaligned_be32(cmd + 6); 2131 if (alloc_len < 4) { 2132 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 6, -1); 2133 return check_condition_result; 2134 } 2135 arr[0] = 0xc8; /* ATS | ATSS | LURS */ 2136 arr[1] = 0x1; /* ITNRS */ 2137 if (repd) { 2138 arr[3] = 0xc; 2139 len = 16; 2140 } else 2141 len = 4; 2142 2143 len = (len < alloc_len) ? len : alloc_len; 2144 return fill_from_dev_buffer(scp, arr, len); 2145 } 2146 2147 /* <<Following mode page info copied from ST318451LW>> */ 2148 2149 static int resp_err_recov_pg(unsigned char *p, int pcontrol, int target) 2150 { /* Read-Write Error Recovery page for mode_sense */ 2151 unsigned char err_recov_pg[] = {0x1, 0xa, 0xc0, 11, 240, 0, 0, 0, 2152 5, 0, 0xff, 0xff}; 2153 2154 memcpy(p, err_recov_pg, sizeof(err_recov_pg)); 2155 if (1 == pcontrol) 2156 memset(p + 2, 0, sizeof(err_recov_pg) - 2); 2157 return sizeof(err_recov_pg); 2158 } 2159 2160 static int resp_disconnect_pg(unsigned char *p, int pcontrol, int target) 2161 { /* Disconnect-Reconnect page for mode_sense */ 2162 unsigned char disconnect_pg[] = {0x2, 0xe, 128, 128, 0, 10, 0, 0, 2163 0, 0, 0, 0, 0, 0, 0, 0}; 2164 2165 memcpy(p, disconnect_pg, sizeof(disconnect_pg)); 2166 if (1 == pcontrol) 2167 memset(p + 2, 0, sizeof(disconnect_pg) - 2); 2168 return sizeof(disconnect_pg); 2169 } 2170 2171 static int resp_format_pg(unsigned char *p, int pcontrol, int target) 2172 { /* Format device page for mode_sense */ 2173 unsigned char format_pg[] = {0x3, 0x16, 0, 0, 0, 0, 0, 0, 2174 0, 0, 0, 0, 0, 0, 0, 0, 2175 0, 0, 0, 0, 0x40, 0, 0, 0}; 2176 2177 memcpy(p, format_pg, sizeof(format_pg)); 2178 put_unaligned_be16(sdebug_sectors_per, p + 10); 2179 put_unaligned_be16(sdebug_sector_size, p + 12); 2180 if (sdebug_removable) 2181 p[20] |= 0x20; /* should agree with INQUIRY */ 2182 if (1 == pcontrol) 2183 memset(p + 2, 0, sizeof(format_pg) - 2); 2184 return sizeof(format_pg); 2185 } 2186 2187 static unsigned char caching_pg[] = {0x8, 18, 0x14, 0, 0xff, 0xff, 0, 0, 2188 0xff, 0xff, 0xff, 0xff, 0x80, 0x14, 0, 0, 2189 0, 0, 0, 0}; 2190 2191 static int resp_caching_pg(unsigned char *p, int pcontrol, int target) 2192 { /* Caching page for mode_sense */ 2193 unsigned char ch_caching_pg[] = {/* 0x8, 18, */ 0x4, 0, 0, 0, 0, 0, 2194 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}; 2195 unsigned char d_caching_pg[] = {0x8, 18, 0x14, 0, 0xff, 0xff, 0, 0, 2196 0xff, 0xff, 0xff, 0xff, 0x80, 0x14, 0, 0, 0, 0, 0, 0}; 2197 2198 if (SDEBUG_OPT_N_WCE & sdebug_opts) 2199 caching_pg[2] &= ~0x4; /* set WCE=0 (default WCE=1) */ 2200 memcpy(p, caching_pg, sizeof(caching_pg)); 2201 if (1 == pcontrol) 2202 memcpy(p + 2, ch_caching_pg, sizeof(ch_caching_pg)); 2203 else if (2 == pcontrol) 2204 memcpy(p, d_caching_pg, sizeof(d_caching_pg)); 2205 return sizeof(caching_pg); 2206 } 2207 2208 static unsigned char ctrl_m_pg[] = {0xa, 10, 2, 0, 0, 0, 0, 0, 2209 0, 0, 0x2, 0x4b}; 2210 2211 static int resp_ctrl_m_pg(unsigned char *p, int pcontrol, int target) 2212 { /* Control mode page for mode_sense */ 2213 unsigned char ch_ctrl_m_pg[] = {/* 0xa, 10, */ 0x6, 0, 0, 0, 0, 0, 2214 0, 0, 0, 0}; 2215 unsigned char d_ctrl_m_pg[] = {0xa, 10, 2, 0, 0, 0, 0, 0, 2216 0, 0, 0x2, 0x4b}; 2217 2218 if (sdebug_dsense) 2219 ctrl_m_pg[2] |= 0x4; 2220 else 2221 ctrl_m_pg[2] &= ~0x4; 2222 2223 if (sdebug_ato) 2224 ctrl_m_pg[5] |= 0x80; /* ATO=1 */ 2225 2226 memcpy(p, ctrl_m_pg, sizeof(ctrl_m_pg)); 2227 if (1 == pcontrol) 2228 memcpy(p + 2, ch_ctrl_m_pg, sizeof(ch_ctrl_m_pg)); 2229 else if (2 == pcontrol) 2230 memcpy(p, d_ctrl_m_pg, sizeof(d_ctrl_m_pg)); 2231 return sizeof(ctrl_m_pg); 2232 } 2233 2234 2235 static int resp_iec_m_pg(unsigned char *p, int pcontrol, int target) 2236 { /* Informational Exceptions control mode page for mode_sense */ 2237 unsigned char ch_iec_m_pg[] = {/* 0x1c, 0xa, */ 0x4, 0xf, 0, 0, 0, 0, 2238 0, 0, 0x0, 0x0}; 2239 unsigned char d_iec_m_pg[] = {0x1c, 0xa, 0x08, 0, 0, 0, 0, 0, 2240 0, 0, 0x0, 0x0}; 2241 2242 memcpy(p, iec_m_pg, sizeof(iec_m_pg)); 2243 if (1 == pcontrol) 2244 memcpy(p + 2, ch_iec_m_pg, sizeof(ch_iec_m_pg)); 2245 else if (2 == pcontrol) 2246 memcpy(p, d_iec_m_pg, sizeof(d_iec_m_pg)); 2247 return sizeof(iec_m_pg); 2248 } 2249 2250 static int resp_sas_sf_m_pg(unsigned char *p, int pcontrol, int target) 2251 { /* SAS SSP mode page - short format for mode_sense */ 2252 unsigned char sas_sf_m_pg[] = {0x19, 0x6, 2253 0x6, 0x0, 0x7, 0xd0, 0x0, 0x0}; 2254 2255 memcpy(p, sas_sf_m_pg, sizeof(sas_sf_m_pg)); 2256 if (1 == pcontrol) 2257 memset(p + 2, 0, sizeof(sas_sf_m_pg) - 2); 2258 return sizeof(sas_sf_m_pg); 2259 } 2260 2261 2262 static int resp_sas_pcd_m_spg(unsigned char *p, int pcontrol, int target, 2263 int target_dev_id) 2264 { /* SAS phy control and discover mode page for mode_sense */ 2265 unsigned char sas_pcd_m_pg[] = {0x59, 0x1, 0, 0x64, 0, 0x6, 0, 2, 2266 0, 0, 0, 0, 0x10, 0x9, 0x8, 0x0, 2267 0, 0, 0, 0, 0, 0, 0, 0, /* insert SAS addr */ 2268 0, 0, 0, 0, 0, 0, 0, 0, /* insert SAS addr */ 2269 0x2, 0, 0, 0, 0, 0, 0, 0, 2270 0x88, 0x99, 0, 0, 0, 0, 0, 0, 2271 0, 0, 0, 0, 0, 0, 0, 0, 2272 0, 1, 0, 0, 0x10, 0x9, 0x8, 0x0, 2273 0, 0, 0, 0, 0, 0, 0, 0, /* insert SAS addr */ 2274 0, 0, 0, 0, 0, 0, 0, 0, /* insert SAS addr */ 2275 0x3, 0, 0, 0, 0, 0, 0, 0, 2276 0x88, 0x99, 0, 0, 0, 0, 0, 0, 2277 0, 0, 0, 0, 0, 0, 0, 0, 2278 }; 2279 int port_a, port_b; 2280 2281 put_unaligned_be64(naa3_comp_a, sas_pcd_m_pg + 16); 2282 put_unaligned_be64(naa3_comp_c + 1, sas_pcd_m_pg + 24); 2283 put_unaligned_be64(naa3_comp_a, sas_pcd_m_pg + 64); 2284 put_unaligned_be64(naa3_comp_c + 1, sas_pcd_m_pg + 72); 2285 port_a = target_dev_id + 1; 2286 port_b = port_a + 1; 2287 memcpy(p, sas_pcd_m_pg, sizeof(sas_pcd_m_pg)); 2288 put_unaligned_be32(port_a, p + 20); 2289 put_unaligned_be32(port_b, p + 48 + 20); 2290 if (1 == pcontrol) 2291 memset(p + 4, 0, sizeof(sas_pcd_m_pg) - 4); 2292 return sizeof(sas_pcd_m_pg); 2293 } 2294 2295 static int resp_sas_sha_m_spg(unsigned char *p, int pcontrol) 2296 { /* SAS SSP shared protocol specific port mode subpage */ 2297 unsigned char sas_sha_m_pg[] = {0x59, 0x2, 0, 0xc, 0, 0x6, 0x10, 0, 2298 0, 0, 0, 0, 0, 0, 0, 0, 2299 }; 2300 2301 memcpy(p, sas_sha_m_pg, sizeof(sas_sha_m_pg)); 2302 if (1 == pcontrol) 2303 memset(p + 4, 0, sizeof(sas_sha_m_pg) - 4); 2304 return sizeof(sas_sha_m_pg); 2305 } 2306 2307 #define SDEBUG_MAX_MSENSE_SZ 256 2308 2309 static int resp_mode_sense(struct scsi_cmnd *scp, 2310 struct sdebug_dev_info *devip) 2311 { 2312 int pcontrol, pcode, subpcode, bd_len; 2313 unsigned char dev_spec; 2314 int alloc_len, offset, len, target_dev_id; 2315 int target = scp->device->id; 2316 unsigned char *ap; 2317 unsigned char arr[SDEBUG_MAX_MSENSE_SZ]; 2318 unsigned char *cmd = scp->cmnd; 2319 bool dbd, llbaa, msense_6, is_disk, is_zbc, bad_pcode; 2320 2321 dbd = !!(cmd[1] & 0x8); /* disable block descriptors */ 2322 pcontrol = (cmd[2] & 0xc0) >> 6; 2323 pcode = cmd[2] & 0x3f; 2324 subpcode = cmd[3]; 2325 msense_6 = (MODE_SENSE == cmd[0]); 2326 llbaa = msense_6 ? false : !!(cmd[1] & 0x10); 2327 is_disk = (sdebug_ptype == TYPE_DISK); 2328 is_zbc = (devip->zmodel != BLK_ZONED_NONE); 2329 if ((is_disk || is_zbc) && !dbd) 2330 bd_len = llbaa ? 16 : 8; 2331 else 2332 bd_len = 0; 2333 alloc_len = msense_6 ? cmd[4] : get_unaligned_be16(cmd + 7); 2334 memset(arr, 0, SDEBUG_MAX_MSENSE_SZ); 2335 if (0x3 == pcontrol) { /* Saving values not supported */ 2336 mk_sense_buffer(scp, ILLEGAL_REQUEST, SAVING_PARAMS_UNSUP, 0); 2337 return check_condition_result; 2338 } 2339 target_dev_id = ((devip->sdbg_host->shost->host_no + 1) * 2000) + 2340 (devip->target * 1000) - 3; 2341 /* for disks+zbc set DPOFUA bit and clear write protect (WP) bit */ 2342 if (is_disk || is_zbc) { 2343 dev_spec = 0x10; /* =0x90 if WP=1 implies read-only */ 2344 if (sdebug_wp) 2345 dev_spec |= 0x80; 2346 } else 2347 dev_spec = 0x0; 2348 if (msense_6) { 2349 arr[2] = dev_spec; 2350 arr[3] = bd_len; 2351 offset = 4; 2352 } else { 2353 arr[3] = dev_spec; 2354 if (16 == bd_len) 2355 arr[4] = 0x1; /* set LONGLBA bit */ 2356 arr[7] = bd_len; /* assume 255 or less */ 2357 offset = 8; 2358 } 2359 ap = arr + offset; 2360 if ((bd_len > 0) && (!sdebug_capacity)) 2361 sdebug_capacity = get_sdebug_capacity(); 2362 2363 if (8 == bd_len) { 2364 if (sdebug_capacity > 0xfffffffe) 2365 put_unaligned_be32(0xffffffff, ap + 0); 2366 else 2367 put_unaligned_be32(sdebug_capacity, ap + 0); 2368 put_unaligned_be16(sdebug_sector_size, ap + 6); 2369 offset += bd_len; 2370 ap = arr + offset; 2371 } else if (16 == bd_len) { 2372 put_unaligned_be64((u64)sdebug_capacity, ap + 0); 2373 put_unaligned_be32(sdebug_sector_size, ap + 12); 2374 offset += bd_len; 2375 ap = arr + offset; 2376 } 2377 2378 if ((subpcode > 0x0) && (subpcode < 0xff) && (0x19 != pcode)) { 2379 /* TODO: Control Extension page */ 2380 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1); 2381 return check_condition_result; 2382 } 2383 bad_pcode = false; 2384 2385 switch (pcode) { 2386 case 0x1: /* Read-Write error recovery page, direct access */ 2387 len = resp_err_recov_pg(ap, pcontrol, target); 2388 offset += len; 2389 break; 2390 case 0x2: /* Disconnect-Reconnect page, all devices */ 2391 len = resp_disconnect_pg(ap, pcontrol, target); 2392 offset += len; 2393 break; 2394 case 0x3: /* Format device page, direct access */ 2395 if (is_disk) { 2396 len = resp_format_pg(ap, pcontrol, target); 2397 offset += len; 2398 } else 2399 bad_pcode = true; 2400 break; 2401 case 0x8: /* Caching page, direct access */ 2402 if (is_disk || is_zbc) { 2403 len = resp_caching_pg(ap, pcontrol, target); 2404 offset += len; 2405 } else 2406 bad_pcode = true; 2407 break; 2408 case 0xa: /* Control Mode page, all devices */ 2409 len = resp_ctrl_m_pg(ap, pcontrol, target); 2410 offset += len; 2411 break; 2412 case 0x19: /* if spc==1 then sas phy, control+discover */ 2413 if ((subpcode > 0x2) && (subpcode < 0xff)) { 2414 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1); 2415 return check_condition_result; 2416 } 2417 len = 0; 2418 if ((0x0 == subpcode) || (0xff == subpcode)) 2419 len += resp_sas_sf_m_pg(ap + len, pcontrol, target); 2420 if ((0x1 == subpcode) || (0xff == subpcode)) 2421 len += resp_sas_pcd_m_spg(ap + len, pcontrol, target, 2422 target_dev_id); 2423 if ((0x2 == subpcode) || (0xff == subpcode)) 2424 len += resp_sas_sha_m_spg(ap + len, pcontrol); 2425 offset += len; 2426 break; 2427 case 0x1c: /* Informational Exceptions Mode page, all devices */ 2428 len = resp_iec_m_pg(ap, pcontrol, target); 2429 offset += len; 2430 break; 2431 case 0x3f: /* Read all Mode pages */ 2432 if ((0 == subpcode) || (0xff == subpcode)) { 2433 len = resp_err_recov_pg(ap, pcontrol, target); 2434 len += resp_disconnect_pg(ap + len, pcontrol, target); 2435 if (is_disk) { 2436 len += resp_format_pg(ap + len, pcontrol, 2437 target); 2438 len += resp_caching_pg(ap + len, pcontrol, 2439 target); 2440 } else if (is_zbc) { 2441 len += resp_caching_pg(ap + len, pcontrol, 2442 target); 2443 } 2444 len += resp_ctrl_m_pg(ap + len, pcontrol, target); 2445 len += resp_sas_sf_m_pg(ap + len, pcontrol, target); 2446 if (0xff == subpcode) { 2447 len += resp_sas_pcd_m_spg(ap + len, pcontrol, 2448 target, target_dev_id); 2449 len += resp_sas_sha_m_spg(ap + len, pcontrol); 2450 } 2451 len += resp_iec_m_pg(ap + len, pcontrol, target); 2452 offset += len; 2453 } else { 2454 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1); 2455 return check_condition_result; 2456 } 2457 break; 2458 default: 2459 bad_pcode = true; 2460 break; 2461 } 2462 if (bad_pcode) { 2463 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 5); 2464 return check_condition_result; 2465 } 2466 if (msense_6) 2467 arr[0] = offset - 1; 2468 else 2469 put_unaligned_be16((offset - 2), arr + 0); 2470 return fill_from_dev_buffer(scp, arr, min_t(int, alloc_len, offset)); 2471 } 2472 2473 #define SDEBUG_MAX_MSELECT_SZ 512 2474 2475 static int resp_mode_select(struct scsi_cmnd *scp, 2476 struct sdebug_dev_info *devip) 2477 { 2478 int pf, sp, ps, md_len, bd_len, off, spf, pg_len; 2479 int param_len, res, mpage; 2480 unsigned char arr[SDEBUG_MAX_MSELECT_SZ]; 2481 unsigned char *cmd = scp->cmnd; 2482 int mselect6 = (MODE_SELECT == cmd[0]); 2483 2484 memset(arr, 0, sizeof(arr)); 2485 pf = cmd[1] & 0x10; 2486 sp = cmd[1] & 0x1; 2487 param_len = mselect6 ? cmd[4] : get_unaligned_be16(cmd + 7); 2488 if ((0 == pf) || sp || (param_len > SDEBUG_MAX_MSELECT_SZ)) { 2489 mk_sense_invalid_fld(scp, SDEB_IN_CDB, mselect6 ? 4 : 7, -1); 2490 return check_condition_result; 2491 } 2492 res = fetch_to_dev_buffer(scp, arr, param_len); 2493 if (-1 == res) 2494 return DID_ERROR << 16; 2495 else if (sdebug_verbose && (res < param_len)) 2496 sdev_printk(KERN_INFO, scp->device, 2497 "%s: cdb indicated=%d, IO sent=%d bytes\n", 2498 __func__, param_len, res); 2499 md_len = mselect6 ? (arr[0] + 1) : (get_unaligned_be16(arr + 0) + 2); 2500 bd_len = mselect6 ? arr[3] : get_unaligned_be16(arr + 6); 2501 if (md_len > 2) { 2502 mk_sense_invalid_fld(scp, SDEB_IN_DATA, 0, -1); 2503 return check_condition_result; 2504 } 2505 off = bd_len + (mselect6 ? 4 : 8); 2506 mpage = arr[off] & 0x3f; 2507 ps = !!(arr[off] & 0x80); 2508 if (ps) { 2509 mk_sense_invalid_fld(scp, SDEB_IN_DATA, off, 7); 2510 return check_condition_result; 2511 } 2512 spf = !!(arr[off] & 0x40); 2513 pg_len = spf ? (get_unaligned_be16(arr + off + 2) + 4) : 2514 (arr[off + 1] + 2); 2515 if ((pg_len + off) > param_len) { 2516 mk_sense_buffer(scp, ILLEGAL_REQUEST, 2517 PARAMETER_LIST_LENGTH_ERR, 0); 2518 return check_condition_result; 2519 } 2520 switch (mpage) { 2521 case 0x8: /* Caching Mode page */ 2522 if (caching_pg[1] == arr[off + 1]) { 2523 memcpy(caching_pg + 2, arr + off + 2, 2524 sizeof(caching_pg) - 2); 2525 goto set_mode_changed_ua; 2526 } 2527 break; 2528 case 0xa: /* Control Mode page */ 2529 if (ctrl_m_pg[1] == arr[off + 1]) { 2530 memcpy(ctrl_m_pg + 2, arr + off + 2, 2531 sizeof(ctrl_m_pg) - 2); 2532 if (ctrl_m_pg[4] & 0x8) 2533 sdebug_wp = true; 2534 else 2535 sdebug_wp = false; 2536 sdebug_dsense = !!(ctrl_m_pg[2] & 0x4); 2537 goto set_mode_changed_ua; 2538 } 2539 break; 2540 case 0x1c: /* Informational Exceptions Mode page */ 2541 if (iec_m_pg[1] == arr[off + 1]) { 2542 memcpy(iec_m_pg + 2, arr + off + 2, 2543 sizeof(iec_m_pg) - 2); 2544 goto set_mode_changed_ua; 2545 } 2546 break; 2547 default: 2548 break; 2549 } 2550 mk_sense_invalid_fld(scp, SDEB_IN_DATA, off, 5); 2551 return check_condition_result; 2552 set_mode_changed_ua: 2553 set_bit(SDEBUG_UA_MODE_CHANGED, devip->uas_bm); 2554 return 0; 2555 } 2556 2557 static int resp_temp_l_pg(unsigned char *arr) 2558 { 2559 unsigned char temp_l_pg[] = {0x0, 0x0, 0x3, 0x2, 0x0, 38, 2560 0x0, 0x1, 0x3, 0x2, 0x0, 65, 2561 }; 2562 2563 memcpy(arr, temp_l_pg, sizeof(temp_l_pg)); 2564 return sizeof(temp_l_pg); 2565 } 2566 2567 static int resp_ie_l_pg(unsigned char *arr) 2568 { 2569 unsigned char ie_l_pg[] = {0x0, 0x0, 0x3, 0x3, 0x0, 0x0, 38, 2570 }; 2571 2572 memcpy(arr, ie_l_pg, sizeof(ie_l_pg)); 2573 if (iec_m_pg[2] & 0x4) { /* TEST bit set */ 2574 arr[4] = THRESHOLD_EXCEEDED; 2575 arr[5] = 0xff; 2576 } 2577 return sizeof(ie_l_pg); 2578 } 2579 2580 #define SDEBUG_MAX_LSENSE_SZ 512 2581 2582 static int resp_log_sense(struct scsi_cmnd *scp, 2583 struct sdebug_dev_info *devip) 2584 { 2585 int ppc, sp, pcode, subpcode, alloc_len, len, n; 2586 unsigned char arr[SDEBUG_MAX_LSENSE_SZ]; 2587 unsigned char *cmd = scp->cmnd; 2588 2589 memset(arr, 0, sizeof(arr)); 2590 ppc = cmd[1] & 0x2; 2591 sp = cmd[1] & 0x1; 2592 if (ppc || sp) { 2593 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, ppc ? 1 : 0); 2594 return check_condition_result; 2595 } 2596 pcode = cmd[2] & 0x3f; 2597 subpcode = cmd[3] & 0xff; 2598 alloc_len = get_unaligned_be16(cmd + 7); 2599 arr[0] = pcode; 2600 if (0 == subpcode) { 2601 switch (pcode) { 2602 case 0x0: /* Supported log pages log page */ 2603 n = 4; 2604 arr[n++] = 0x0; /* this page */ 2605 arr[n++] = 0xd; /* Temperature */ 2606 arr[n++] = 0x2f; /* Informational exceptions */ 2607 arr[3] = n - 4; 2608 break; 2609 case 0xd: /* Temperature log page */ 2610 arr[3] = resp_temp_l_pg(arr + 4); 2611 break; 2612 case 0x2f: /* Informational exceptions log page */ 2613 arr[3] = resp_ie_l_pg(arr + 4); 2614 break; 2615 default: 2616 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 5); 2617 return check_condition_result; 2618 } 2619 } else if (0xff == subpcode) { 2620 arr[0] |= 0x40; 2621 arr[1] = subpcode; 2622 switch (pcode) { 2623 case 0x0: /* Supported log pages and subpages log page */ 2624 n = 4; 2625 arr[n++] = 0x0; 2626 arr[n++] = 0x0; /* 0,0 page */ 2627 arr[n++] = 0x0; 2628 arr[n++] = 0xff; /* this page */ 2629 arr[n++] = 0xd; 2630 arr[n++] = 0x0; /* Temperature */ 2631 arr[n++] = 0x2f; 2632 arr[n++] = 0x0; /* Informational exceptions */ 2633 arr[3] = n - 4; 2634 break; 2635 case 0xd: /* Temperature subpages */ 2636 n = 4; 2637 arr[n++] = 0xd; 2638 arr[n++] = 0x0; /* Temperature */ 2639 arr[3] = n - 4; 2640 break; 2641 case 0x2f: /* Informational exceptions subpages */ 2642 n = 4; 2643 arr[n++] = 0x2f; 2644 arr[n++] = 0x0; /* Informational exceptions */ 2645 arr[3] = n - 4; 2646 break; 2647 default: 2648 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 5); 2649 return check_condition_result; 2650 } 2651 } else { 2652 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1); 2653 return check_condition_result; 2654 } 2655 len = min_t(int, get_unaligned_be16(arr + 2) + 4, alloc_len); 2656 return fill_from_dev_buffer(scp, arr, 2657 min_t(int, len, SDEBUG_MAX_INQ_ARR_SZ)); 2658 } 2659 2660 static inline bool sdebug_dev_is_zoned(struct sdebug_dev_info *devip) 2661 { 2662 return devip->nr_zones != 0; 2663 } 2664 2665 static struct sdeb_zone_state *zbc_zone(struct sdebug_dev_info *devip, 2666 unsigned long long lba) 2667 { 2668 return &devip->zstate[lba >> devip->zsize_shift]; 2669 } 2670 2671 static inline bool zbc_zone_is_conv(struct sdeb_zone_state *zsp) 2672 { 2673 return zsp->z_type == ZBC_ZONE_TYPE_CNV; 2674 } 2675 2676 static void zbc_close_zone(struct sdebug_dev_info *devip, 2677 struct sdeb_zone_state *zsp) 2678 { 2679 enum sdebug_z_cond zc; 2680 2681 if (zbc_zone_is_conv(zsp)) 2682 return; 2683 2684 zc = zsp->z_cond; 2685 if (!(zc == ZC2_IMPLICIT_OPEN || zc == ZC3_EXPLICIT_OPEN)) 2686 return; 2687 2688 if (zc == ZC2_IMPLICIT_OPEN) 2689 devip->nr_imp_open--; 2690 else 2691 devip->nr_exp_open--; 2692 2693 if (zsp->z_wp == zsp->z_start) { 2694 zsp->z_cond = ZC1_EMPTY; 2695 } else { 2696 zsp->z_cond = ZC4_CLOSED; 2697 devip->nr_closed++; 2698 } 2699 } 2700 2701 static void zbc_close_imp_open_zone(struct sdebug_dev_info *devip) 2702 { 2703 struct sdeb_zone_state *zsp = &devip->zstate[0]; 2704 unsigned int i; 2705 2706 for (i = 0; i < devip->nr_zones; i++, zsp++) { 2707 if (zsp->z_cond == ZC2_IMPLICIT_OPEN) { 2708 zbc_close_zone(devip, zsp); 2709 return; 2710 } 2711 } 2712 } 2713 2714 static void zbc_open_zone(struct sdebug_dev_info *devip, 2715 struct sdeb_zone_state *zsp, bool explicit) 2716 { 2717 enum sdebug_z_cond zc; 2718 2719 if (zbc_zone_is_conv(zsp)) 2720 return; 2721 2722 zc = zsp->z_cond; 2723 if ((explicit && zc == ZC3_EXPLICIT_OPEN) || 2724 (!explicit && zc == ZC2_IMPLICIT_OPEN)) 2725 return; 2726 2727 /* Close an implicit open zone if necessary */ 2728 if (explicit && zsp->z_cond == ZC2_IMPLICIT_OPEN) 2729 zbc_close_zone(devip, zsp); 2730 else if (devip->max_open && 2731 devip->nr_imp_open + devip->nr_exp_open >= devip->max_open) 2732 zbc_close_imp_open_zone(devip); 2733 2734 if (zsp->z_cond == ZC4_CLOSED) 2735 devip->nr_closed--; 2736 if (explicit) { 2737 zsp->z_cond = ZC3_EXPLICIT_OPEN; 2738 devip->nr_exp_open++; 2739 } else { 2740 zsp->z_cond = ZC2_IMPLICIT_OPEN; 2741 devip->nr_imp_open++; 2742 } 2743 } 2744 2745 static void zbc_inc_wp(struct sdebug_dev_info *devip, 2746 unsigned long long lba, unsigned int num) 2747 { 2748 struct sdeb_zone_state *zsp = zbc_zone(devip, lba); 2749 unsigned long long n, end, zend = zsp->z_start + zsp->z_size; 2750 2751 if (zbc_zone_is_conv(zsp)) 2752 return; 2753 2754 if (zsp->z_type == ZBC_ZONE_TYPE_SWR) { 2755 zsp->z_wp += num; 2756 if (zsp->z_wp >= zend) 2757 zsp->z_cond = ZC5_FULL; 2758 return; 2759 } 2760 2761 while (num) { 2762 if (lba != zsp->z_wp) 2763 zsp->z_non_seq_resource = true; 2764 2765 end = lba + num; 2766 if (end >= zend) { 2767 n = zend - lba; 2768 zsp->z_wp = zend; 2769 } else if (end > zsp->z_wp) { 2770 n = num; 2771 zsp->z_wp = end; 2772 } else { 2773 n = num; 2774 } 2775 if (zsp->z_wp >= zend) 2776 zsp->z_cond = ZC5_FULL; 2777 2778 num -= n; 2779 lba += n; 2780 if (num) { 2781 zsp++; 2782 zend = zsp->z_start + zsp->z_size; 2783 } 2784 } 2785 } 2786 2787 static int check_zbc_access_params(struct scsi_cmnd *scp, 2788 unsigned long long lba, unsigned int num, bool write) 2789 { 2790 struct scsi_device *sdp = scp->device; 2791 struct sdebug_dev_info *devip = (struct sdebug_dev_info *)sdp->hostdata; 2792 struct sdeb_zone_state *zsp = zbc_zone(devip, lba); 2793 struct sdeb_zone_state *zsp_end = zbc_zone(devip, lba + num - 1); 2794 2795 if (!write) { 2796 if (devip->zmodel == BLK_ZONED_HA) 2797 return 0; 2798 /* For host-managed, reads cannot cross zone types boundaries */ 2799 if (zsp_end != zsp && 2800 zbc_zone_is_conv(zsp) && 2801 !zbc_zone_is_conv(zsp_end)) { 2802 mk_sense_buffer(scp, ILLEGAL_REQUEST, 2803 LBA_OUT_OF_RANGE, 2804 READ_INVDATA_ASCQ); 2805 return check_condition_result; 2806 } 2807 return 0; 2808 } 2809 2810 /* No restrictions for writes within conventional zones */ 2811 if (zbc_zone_is_conv(zsp)) { 2812 if (!zbc_zone_is_conv(zsp_end)) { 2813 mk_sense_buffer(scp, ILLEGAL_REQUEST, 2814 LBA_OUT_OF_RANGE, 2815 WRITE_BOUNDARY_ASCQ); 2816 return check_condition_result; 2817 } 2818 return 0; 2819 } 2820 2821 if (zsp->z_type == ZBC_ZONE_TYPE_SWR) { 2822 /* Writes cannot cross sequential zone boundaries */ 2823 if (zsp_end != zsp) { 2824 mk_sense_buffer(scp, ILLEGAL_REQUEST, 2825 LBA_OUT_OF_RANGE, 2826 WRITE_BOUNDARY_ASCQ); 2827 return check_condition_result; 2828 } 2829 /* Cannot write full zones */ 2830 if (zsp->z_cond == ZC5_FULL) { 2831 mk_sense_buffer(scp, ILLEGAL_REQUEST, 2832 INVALID_FIELD_IN_CDB, 0); 2833 return check_condition_result; 2834 } 2835 /* Writes must be aligned to the zone WP */ 2836 if (lba != zsp->z_wp) { 2837 mk_sense_buffer(scp, ILLEGAL_REQUEST, 2838 LBA_OUT_OF_RANGE, 2839 UNALIGNED_WRITE_ASCQ); 2840 return check_condition_result; 2841 } 2842 } 2843 2844 /* Handle implicit open of closed and empty zones */ 2845 if (zsp->z_cond == ZC1_EMPTY || zsp->z_cond == ZC4_CLOSED) { 2846 if (devip->max_open && 2847 devip->nr_exp_open >= devip->max_open) { 2848 mk_sense_buffer(scp, DATA_PROTECT, 2849 INSUFF_RES_ASC, 2850 INSUFF_ZONE_ASCQ); 2851 return check_condition_result; 2852 } 2853 zbc_open_zone(devip, zsp, false); 2854 } 2855 2856 return 0; 2857 } 2858 2859 static inline int check_device_access_params 2860 (struct scsi_cmnd *scp, unsigned long long lba, 2861 unsigned int num, bool write) 2862 { 2863 struct scsi_device *sdp = scp->device; 2864 struct sdebug_dev_info *devip = (struct sdebug_dev_info *)sdp->hostdata; 2865 2866 if (lba + num > sdebug_capacity) { 2867 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0); 2868 return check_condition_result; 2869 } 2870 /* transfer length excessive (tie in to block limits VPD page) */ 2871 if (num > sdebug_store_sectors) { 2872 /* needs work to find which cdb byte 'num' comes from */ 2873 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0); 2874 return check_condition_result; 2875 } 2876 if (write && unlikely(sdebug_wp)) { 2877 mk_sense_buffer(scp, DATA_PROTECT, WRITE_PROTECTED, 0x2); 2878 return check_condition_result; 2879 } 2880 if (sdebug_dev_is_zoned(devip)) 2881 return check_zbc_access_params(scp, lba, num, write); 2882 2883 return 0; 2884 } 2885 2886 /* 2887 * Note: if BUG_ON() fires it usually indicates a problem with the parser 2888 * tables. Perhaps a missing F_FAKE_RW or FF_MEDIA_IO flag. Response functions 2889 * that access any of the "stores" in struct sdeb_store_info should call this 2890 * function with bug_if_fake_rw set to true. 2891 */ 2892 static inline struct sdeb_store_info *devip2sip(struct sdebug_dev_info *devip, 2893 bool bug_if_fake_rw) 2894 { 2895 if (sdebug_fake_rw) { 2896 BUG_ON(bug_if_fake_rw); /* See note above */ 2897 return NULL; 2898 } 2899 return xa_load(per_store_ap, devip->sdbg_host->si_idx); 2900 } 2901 2902 /* Returns number of bytes copied or -1 if error. */ 2903 static int do_device_access(struct sdeb_store_info *sip, struct scsi_cmnd *scp, 2904 u32 sg_skip, u64 lba, u32 num, bool do_write) 2905 { 2906 int ret; 2907 u64 block, rest = 0; 2908 enum dma_data_direction dir; 2909 struct scsi_data_buffer *sdb = &scp->sdb; 2910 u8 *fsp; 2911 2912 if (do_write) { 2913 dir = DMA_TO_DEVICE; 2914 write_since_sync = true; 2915 } else { 2916 dir = DMA_FROM_DEVICE; 2917 } 2918 2919 if (!sdb->length || !sip) 2920 return 0; 2921 if (scp->sc_data_direction != dir) 2922 return -1; 2923 fsp = sip->storep; 2924 2925 block = do_div(lba, sdebug_store_sectors); 2926 if (block + num > sdebug_store_sectors) 2927 rest = block + num - sdebug_store_sectors; 2928 2929 ret = sg_copy_buffer(sdb->table.sgl, sdb->table.nents, 2930 fsp + (block * sdebug_sector_size), 2931 (num - rest) * sdebug_sector_size, sg_skip, do_write); 2932 if (ret != (num - rest) * sdebug_sector_size) 2933 return ret; 2934 2935 if (rest) { 2936 ret += sg_copy_buffer(sdb->table.sgl, sdb->table.nents, 2937 fsp, rest * sdebug_sector_size, 2938 sg_skip + ((num - rest) * sdebug_sector_size), 2939 do_write); 2940 } 2941 2942 return ret; 2943 } 2944 2945 /* Returns number of bytes copied or -1 if error. */ 2946 static int do_dout_fetch(struct scsi_cmnd *scp, u32 num, u8 *doutp) 2947 { 2948 struct scsi_data_buffer *sdb = &scp->sdb; 2949 2950 if (!sdb->length) 2951 return 0; 2952 if (scp->sc_data_direction != DMA_TO_DEVICE) 2953 return -1; 2954 return sg_copy_buffer(sdb->table.sgl, sdb->table.nents, doutp, 2955 num * sdebug_sector_size, 0, true); 2956 } 2957 2958 /* If sip->storep+lba compares equal to arr(num), then copy top half of 2959 * arr into sip->storep+lba and return true. If comparison fails then 2960 * return false. */ 2961 static bool comp_write_worker(struct sdeb_store_info *sip, u64 lba, u32 num, 2962 const u8 *arr, bool compare_only) 2963 { 2964 bool res; 2965 u64 block, rest = 0; 2966 u32 store_blks = sdebug_store_sectors; 2967 u32 lb_size = sdebug_sector_size; 2968 u8 *fsp = sip->storep; 2969 2970 block = do_div(lba, store_blks); 2971 if (block + num > store_blks) 2972 rest = block + num - store_blks; 2973 2974 res = !memcmp(fsp + (block * lb_size), arr, (num - rest) * lb_size); 2975 if (!res) 2976 return res; 2977 if (rest) 2978 res = memcmp(fsp, arr + ((num - rest) * lb_size), 2979 rest * lb_size); 2980 if (!res) 2981 return res; 2982 if (compare_only) 2983 return true; 2984 arr += num * lb_size; 2985 memcpy(fsp + (block * lb_size), arr, (num - rest) * lb_size); 2986 if (rest) 2987 memcpy(fsp, arr + ((num - rest) * lb_size), rest * lb_size); 2988 return res; 2989 } 2990 2991 static __be16 dif_compute_csum(const void *buf, int len) 2992 { 2993 __be16 csum; 2994 2995 if (sdebug_guard) 2996 csum = (__force __be16)ip_compute_csum(buf, len); 2997 else 2998 csum = cpu_to_be16(crc_t10dif(buf, len)); 2999 3000 return csum; 3001 } 3002 3003 static int dif_verify(struct t10_pi_tuple *sdt, const void *data, 3004 sector_t sector, u32 ei_lba) 3005 { 3006 __be16 csum = dif_compute_csum(data, sdebug_sector_size); 3007 3008 if (sdt->guard_tag != csum) { 3009 pr_err("GUARD check failed on sector %lu rcvd 0x%04x, data 0x%04x\n", 3010 (unsigned long)sector, 3011 be16_to_cpu(sdt->guard_tag), 3012 be16_to_cpu(csum)); 3013 return 0x01; 3014 } 3015 if (sdebug_dif == T10_PI_TYPE1_PROTECTION && 3016 be32_to_cpu(sdt->ref_tag) != (sector & 0xffffffff)) { 3017 pr_err("REF check failed on sector %lu\n", 3018 (unsigned long)sector); 3019 return 0x03; 3020 } 3021 if (sdebug_dif == T10_PI_TYPE2_PROTECTION && 3022 be32_to_cpu(sdt->ref_tag) != ei_lba) { 3023 pr_err("REF check failed on sector %lu\n", 3024 (unsigned long)sector); 3025 return 0x03; 3026 } 3027 return 0; 3028 } 3029 3030 static void dif_copy_prot(struct scsi_cmnd *scp, sector_t sector, 3031 unsigned int sectors, bool read) 3032 { 3033 size_t resid; 3034 void *paddr; 3035 struct sdeb_store_info *sip = devip2sip((struct sdebug_dev_info *) 3036 scp->device->hostdata, true); 3037 struct t10_pi_tuple *dif_storep = sip->dif_storep; 3038 const void *dif_store_end = dif_storep + sdebug_store_sectors; 3039 struct sg_mapping_iter miter; 3040 3041 /* Bytes of protection data to copy into sgl */ 3042 resid = sectors * sizeof(*dif_storep); 3043 3044 sg_miter_start(&miter, scsi_prot_sglist(scp), 3045 scsi_prot_sg_count(scp), SG_MITER_ATOMIC | 3046 (read ? SG_MITER_TO_SG : SG_MITER_FROM_SG)); 3047 3048 while (sg_miter_next(&miter) && resid > 0) { 3049 size_t len = min_t(size_t, miter.length, resid); 3050 void *start = dif_store(sip, sector); 3051 size_t rest = 0; 3052 3053 if (dif_store_end < start + len) 3054 rest = start + len - dif_store_end; 3055 3056 paddr = miter.addr; 3057 3058 if (read) 3059 memcpy(paddr, start, len - rest); 3060 else 3061 memcpy(start, paddr, len - rest); 3062 3063 if (rest) { 3064 if (read) 3065 memcpy(paddr + len - rest, dif_storep, rest); 3066 else 3067 memcpy(dif_storep, paddr + len - rest, rest); 3068 } 3069 3070 sector += len / sizeof(*dif_storep); 3071 resid -= len; 3072 } 3073 sg_miter_stop(&miter); 3074 } 3075 3076 static int prot_verify_read(struct scsi_cmnd *scp, sector_t start_sec, 3077 unsigned int sectors, u32 ei_lba) 3078 { 3079 unsigned int i; 3080 sector_t sector; 3081 struct sdeb_store_info *sip = devip2sip((struct sdebug_dev_info *) 3082 scp->device->hostdata, true); 3083 struct t10_pi_tuple *sdt; 3084 3085 for (i = 0; i < sectors; i++, ei_lba++) { 3086 int ret; 3087 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 ret = dif_verify(sdt, lba2fake_store(sip, sector), sector, 3095 ei_lba); 3096 if (ret) { 3097 dif_errors++; 3098 return ret; 3099 } 3100 } 3101 3102 dif_copy_prot(scp, start_sec, sectors, true); 3103 dix_reads++; 3104 3105 return 0; 3106 } 3107 3108 static int resp_read_dt0(struct scsi_cmnd *scp, struct sdebug_dev_info *devip) 3109 { 3110 bool check_prot; 3111 u32 num; 3112 u32 ei_lba; 3113 int ret; 3114 u64 lba; 3115 struct sdeb_store_info *sip = devip2sip(devip, true); 3116 rwlock_t *macc_lckp = sip ? &sip->macc_lck : &sdeb_fake_rw_lck; 3117 u8 *cmd = scp->cmnd; 3118 3119 switch (cmd[0]) { 3120 case READ_16: 3121 ei_lba = 0; 3122 lba = get_unaligned_be64(cmd + 2); 3123 num = get_unaligned_be32(cmd + 10); 3124 check_prot = true; 3125 break; 3126 case READ_10: 3127 ei_lba = 0; 3128 lba = get_unaligned_be32(cmd + 2); 3129 num = get_unaligned_be16(cmd + 7); 3130 check_prot = true; 3131 break; 3132 case READ_6: 3133 ei_lba = 0; 3134 lba = (u32)cmd[3] | (u32)cmd[2] << 8 | 3135 (u32)(cmd[1] & 0x1f) << 16; 3136 num = (0 == cmd[4]) ? 256 : cmd[4]; 3137 check_prot = true; 3138 break; 3139 case READ_12: 3140 ei_lba = 0; 3141 lba = get_unaligned_be32(cmd + 2); 3142 num = get_unaligned_be32(cmd + 6); 3143 check_prot = true; 3144 break; 3145 case XDWRITEREAD_10: 3146 ei_lba = 0; 3147 lba = get_unaligned_be32(cmd + 2); 3148 num = get_unaligned_be16(cmd + 7); 3149 check_prot = false; 3150 break; 3151 default: /* assume READ(32) */ 3152 lba = get_unaligned_be64(cmd + 12); 3153 ei_lba = get_unaligned_be32(cmd + 20); 3154 num = get_unaligned_be32(cmd + 28); 3155 check_prot = false; 3156 break; 3157 } 3158 if (unlikely(have_dif_prot && check_prot)) { 3159 if (sdebug_dif == T10_PI_TYPE2_PROTECTION && 3160 (cmd[1] & 0xe0)) { 3161 mk_sense_invalid_opcode(scp); 3162 return check_condition_result; 3163 } 3164 if ((sdebug_dif == T10_PI_TYPE1_PROTECTION || 3165 sdebug_dif == T10_PI_TYPE3_PROTECTION) && 3166 (cmd[1] & 0xe0) == 0) 3167 sdev_printk(KERN_ERR, scp->device, "Unprotected RD " 3168 "to DIF device\n"); 3169 } 3170 if (unlikely((sdebug_opts & SDEBUG_OPT_SHORT_TRANSFER) && 3171 atomic_read(&sdeb_inject_pending))) { 3172 num /= 2; 3173 atomic_set(&sdeb_inject_pending, 0); 3174 } 3175 3176 ret = check_device_access_params(scp, lba, num, false); 3177 if (ret) 3178 return ret; 3179 if (unlikely((SDEBUG_OPT_MEDIUM_ERR & sdebug_opts) && 3180 (lba <= (sdebug_medium_error_start + sdebug_medium_error_count - 1)) && 3181 ((lba + num) > sdebug_medium_error_start))) { 3182 /* claim unrecoverable read error */ 3183 mk_sense_buffer(scp, MEDIUM_ERROR, UNRECOVERED_READ_ERR, 0); 3184 /* set info field and valid bit for fixed descriptor */ 3185 if (0x70 == (scp->sense_buffer[0] & 0x7f)) { 3186 scp->sense_buffer[0] |= 0x80; /* Valid bit */ 3187 ret = (lba < OPT_MEDIUM_ERR_ADDR) 3188 ? OPT_MEDIUM_ERR_ADDR : (int)lba; 3189 put_unaligned_be32(ret, scp->sense_buffer + 3); 3190 } 3191 scsi_set_resid(scp, scsi_bufflen(scp)); 3192 return check_condition_result; 3193 } 3194 3195 read_lock(macc_lckp); 3196 3197 /* DIX + T10 DIF */ 3198 if (unlikely(sdebug_dix && scsi_prot_sg_count(scp))) { 3199 int prot_ret = prot_verify_read(scp, lba, num, ei_lba); 3200 3201 if (prot_ret) { 3202 read_unlock(macc_lckp); 3203 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, prot_ret); 3204 return illegal_condition_result; 3205 } 3206 } 3207 3208 ret = do_device_access(sip, scp, 0, lba, num, false); 3209 read_unlock(macc_lckp); 3210 if (unlikely(ret == -1)) 3211 return DID_ERROR << 16; 3212 3213 scsi_set_resid(scp, scsi_bufflen(scp) - ret); 3214 3215 if (unlikely((sdebug_opts & SDEBUG_OPT_RECOV_DIF_DIX) && 3216 atomic_read(&sdeb_inject_pending))) { 3217 if (sdebug_opts & SDEBUG_OPT_RECOVERED_ERR) { 3218 mk_sense_buffer(scp, RECOVERED_ERROR, THRESHOLD_EXCEEDED, 0); 3219 atomic_set(&sdeb_inject_pending, 0); 3220 return check_condition_result; 3221 } else if (sdebug_opts & SDEBUG_OPT_DIF_ERR) { 3222 /* Logical block guard check failed */ 3223 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 1); 3224 atomic_set(&sdeb_inject_pending, 0); 3225 return illegal_condition_result; 3226 } else if (SDEBUG_OPT_DIX_ERR & sdebug_opts) { 3227 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 1); 3228 atomic_set(&sdeb_inject_pending, 0); 3229 return illegal_condition_result; 3230 } 3231 } 3232 return 0; 3233 } 3234 3235 static void dump_sector(unsigned char *buf, int len) 3236 { 3237 int i, j, n; 3238 3239 pr_err(">>> Sector Dump <<<\n"); 3240 for (i = 0 ; i < len ; i += 16) { 3241 char b[128]; 3242 3243 for (j = 0, n = 0; j < 16; j++) { 3244 unsigned char c = buf[i+j]; 3245 3246 if (c >= 0x20 && c < 0x7e) 3247 n += scnprintf(b + n, sizeof(b) - n, 3248 " %c ", buf[i+j]); 3249 else 3250 n += scnprintf(b + n, sizeof(b) - n, 3251 "%02x ", buf[i+j]); 3252 } 3253 pr_err("%04d: %s\n", i, b); 3254 } 3255 } 3256 3257 static int prot_verify_write(struct scsi_cmnd *SCpnt, sector_t start_sec, 3258 unsigned int sectors, u32 ei_lba) 3259 { 3260 int ret; 3261 struct t10_pi_tuple *sdt; 3262 void *daddr; 3263 sector_t sector = start_sec; 3264 int ppage_offset; 3265 int dpage_offset; 3266 struct sg_mapping_iter diter; 3267 struct sg_mapping_iter piter; 3268 3269 BUG_ON(scsi_sg_count(SCpnt) == 0); 3270 BUG_ON(scsi_prot_sg_count(SCpnt) == 0); 3271 3272 sg_miter_start(&piter, scsi_prot_sglist(SCpnt), 3273 scsi_prot_sg_count(SCpnt), 3274 SG_MITER_ATOMIC | SG_MITER_FROM_SG); 3275 sg_miter_start(&diter, scsi_sglist(SCpnt), scsi_sg_count(SCpnt), 3276 SG_MITER_ATOMIC | SG_MITER_FROM_SG); 3277 3278 /* For each protection page */ 3279 while (sg_miter_next(&piter)) { 3280 dpage_offset = 0; 3281 if (WARN_ON(!sg_miter_next(&diter))) { 3282 ret = 0x01; 3283 goto out; 3284 } 3285 3286 for (ppage_offset = 0; ppage_offset < piter.length; 3287 ppage_offset += sizeof(struct t10_pi_tuple)) { 3288 /* If we're at the end of the current 3289 * data page advance to the next one 3290 */ 3291 if (dpage_offset >= diter.length) { 3292 if (WARN_ON(!sg_miter_next(&diter))) { 3293 ret = 0x01; 3294 goto out; 3295 } 3296 dpage_offset = 0; 3297 } 3298 3299 sdt = piter.addr + ppage_offset; 3300 daddr = diter.addr + dpage_offset; 3301 3302 ret = dif_verify(sdt, daddr, sector, ei_lba); 3303 if (ret) { 3304 dump_sector(daddr, sdebug_sector_size); 3305 goto out; 3306 } 3307 3308 sector++; 3309 ei_lba++; 3310 dpage_offset += sdebug_sector_size; 3311 } 3312 diter.consumed = dpage_offset; 3313 sg_miter_stop(&diter); 3314 } 3315 sg_miter_stop(&piter); 3316 3317 dif_copy_prot(SCpnt, start_sec, sectors, false); 3318 dix_writes++; 3319 3320 return 0; 3321 3322 out: 3323 dif_errors++; 3324 sg_miter_stop(&diter); 3325 sg_miter_stop(&piter); 3326 return ret; 3327 } 3328 3329 static unsigned long lba_to_map_index(sector_t lba) 3330 { 3331 if (sdebug_unmap_alignment) 3332 lba += sdebug_unmap_granularity - sdebug_unmap_alignment; 3333 sector_div(lba, sdebug_unmap_granularity); 3334 return lba; 3335 } 3336 3337 static sector_t map_index_to_lba(unsigned long index) 3338 { 3339 sector_t lba = index * sdebug_unmap_granularity; 3340 3341 if (sdebug_unmap_alignment) 3342 lba -= sdebug_unmap_granularity - sdebug_unmap_alignment; 3343 return lba; 3344 } 3345 3346 static unsigned int map_state(struct sdeb_store_info *sip, sector_t lba, 3347 unsigned int *num) 3348 { 3349 sector_t end; 3350 unsigned int mapped; 3351 unsigned long index; 3352 unsigned long next; 3353 3354 index = lba_to_map_index(lba); 3355 mapped = test_bit(index, sip->map_storep); 3356 3357 if (mapped) 3358 next = find_next_zero_bit(sip->map_storep, map_size, index); 3359 else 3360 next = find_next_bit(sip->map_storep, map_size, index); 3361 3362 end = min_t(sector_t, sdebug_store_sectors, map_index_to_lba(next)); 3363 *num = end - lba; 3364 return mapped; 3365 } 3366 3367 static void map_region(struct sdeb_store_info *sip, sector_t lba, 3368 unsigned int len) 3369 { 3370 sector_t end = lba + len; 3371 3372 while (lba < end) { 3373 unsigned long index = lba_to_map_index(lba); 3374 3375 if (index < map_size) 3376 set_bit(index, sip->map_storep); 3377 3378 lba = map_index_to_lba(index + 1); 3379 } 3380 } 3381 3382 static void unmap_region(struct sdeb_store_info *sip, sector_t lba, 3383 unsigned int len) 3384 { 3385 sector_t end = lba + len; 3386 u8 *fsp = sip->storep; 3387 3388 while (lba < end) { 3389 unsigned long index = lba_to_map_index(lba); 3390 3391 if (lba == map_index_to_lba(index) && 3392 lba + sdebug_unmap_granularity <= end && 3393 index < map_size) { 3394 clear_bit(index, sip->map_storep); 3395 if (sdebug_lbprz) { /* for LBPRZ=2 return 0xff_s */ 3396 memset(fsp + lba * sdebug_sector_size, 3397 (sdebug_lbprz & 1) ? 0 : 0xff, 3398 sdebug_sector_size * 3399 sdebug_unmap_granularity); 3400 } 3401 if (sip->dif_storep) { 3402 memset(sip->dif_storep + lba, 0xff, 3403 sizeof(*sip->dif_storep) * 3404 sdebug_unmap_granularity); 3405 } 3406 } 3407 lba = map_index_to_lba(index + 1); 3408 } 3409 } 3410 3411 static int resp_write_dt0(struct scsi_cmnd *scp, struct sdebug_dev_info *devip) 3412 { 3413 bool check_prot; 3414 u32 num; 3415 u32 ei_lba; 3416 int ret; 3417 u64 lba; 3418 struct sdeb_store_info *sip = devip2sip(devip, true); 3419 rwlock_t *macc_lckp = &sip->macc_lck; 3420 u8 *cmd = scp->cmnd; 3421 3422 switch (cmd[0]) { 3423 case WRITE_16: 3424 ei_lba = 0; 3425 lba = get_unaligned_be64(cmd + 2); 3426 num = get_unaligned_be32(cmd + 10); 3427 check_prot = true; 3428 break; 3429 case WRITE_10: 3430 ei_lba = 0; 3431 lba = get_unaligned_be32(cmd + 2); 3432 num = get_unaligned_be16(cmd + 7); 3433 check_prot = true; 3434 break; 3435 case WRITE_6: 3436 ei_lba = 0; 3437 lba = (u32)cmd[3] | (u32)cmd[2] << 8 | 3438 (u32)(cmd[1] & 0x1f) << 16; 3439 num = (0 == cmd[4]) ? 256 : cmd[4]; 3440 check_prot = true; 3441 break; 3442 case WRITE_12: 3443 ei_lba = 0; 3444 lba = get_unaligned_be32(cmd + 2); 3445 num = get_unaligned_be32(cmd + 6); 3446 check_prot = true; 3447 break; 3448 case 0x53: /* XDWRITEREAD(10) */ 3449 ei_lba = 0; 3450 lba = get_unaligned_be32(cmd + 2); 3451 num = get_unaligned_be16(cmd + 7); 3452 check_prot = false; 3453 break; 3454 default: /* assume WRITE(32) */ 3455 lba = get_unaligned_be64(cmd + 12); 3456 ei_lba = get_unaligned_be32(cmd + 20); 3457 num = get_unaligned_be32(cmd + 28); 3458 check_prot = false; 3459 break; 3460 } 3461 if (unlikely(have_dif_prot && check_prot)) { 3462 if (sdebug_dif == T10_PI_TYPE2_PROTECTION && 3463 (cmd[1] & 0xe0)) { 3464 mk_sense_invalid_opcode(scp); 3465 return check_condition_result; 3466 } 3467 if ((sdebug_dif == T10_PI_TYPE1_PROTECTION || 3468 sdebug_dif == T10_PI_TYPE3_PROTECTION) && 3469 (cmd[1] & 0xe0) == 0) 3470 sdev_printk(KERN_ERR, scp->device, "Unprotected WR " 3471 "to DIF device\n"); 3472 } 3473 3474 write_lock(macc_lckp); 3475 ret = check_device_access_params(scp, lba, num, true); 3476 if (ret) { 3477 write_unlock(macc_lckp); 3478 return ret; 3479 } 3480 3481 /* DIX + T10 DIF */ 3482 if (unlikely(sdebug_dix && scsi_prot_sg_count(scp))) { 3483 int prot_ret = prot_verify_write(scp, lba, num, ei_lba); 3484 3485 if (prot_ret) { 3486 write_unlock(macc_lckp); 3487 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, prot_ret); 3488 return illegal_condition_result; 3489 } 3490 } 3491 3492 ret = do_device_access(sip, scp, 0, lba, num, true); 3493 if (unlikely(scsi_debug_lbp())) 3494 map_region(sip, lba, num); 3495 /* If ZBC zone then bump its write pointer */ 3496 if (sdebug_dev_is_zoned(devip)) 3497 zbc_inc_wp(devip, lba, num); 3498 write_unlock(macc_lckp); 3499 if (unlikely(-1 == ret)) 3500 return DID_ERROR << 16; 3501 else if (unlikely(sdebug_verbose && 3502 (ret < (num * sdebug_sector_size)))) 3503 sdev_printk(KERN_INFO, scp->device, 3504 "%s: write: cdb indicated=%u, IO sent=%d bytes\n", 3505 my_name, num * sdebug_sector_size, ret); 3506 3507 if (unlikely((sdebug_opts & SDEBUG_OPT_RECOV_DIF_DIX) && 3508 atomic_read(&sdeb_inject_pending))) { 3509 if (sdebug_opts & SDEBUG_OPT_RECOVERED_ERR) { 3510 mk_sense_buffer(scp, RECOVERED_ERROR, THRESHOLD_EXCEEDED, 0); 3511 atomic_set(&sdeb_inject_pending, 0); 3512 return check_condition_result; 3513 } else if (sdebug_opts & SDEBUG_OPT_DIF_ERR) { 3514 /* Logical block guard check failed */ 3515 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 1); 3516 atomic_set(&sdeb_inject_pending, 0); 3517 return illegal_condition_result; 3518 } else if (sdebug_opts & SDEBUG_OPT_DIX_ERR) { 3519 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 1); 3520 atomic_set(&sdeb_inject_pending, 0); 3521 return illegal_condition_result; 3522 } 3523 } 3524 return 0; 3525 } 3526 3527 /* 3528 * T10 has only specified WRITE SCATTERED(16) and WRITE SCATTERED(32). 3529 * No READ GATHERED yet (requires bidi or long cdb holding gather list). 3530 */ 3531 static int resp_write_scat(struct scsi_cmnd *scp, 3532 struct sdebug_dev_info *devip) 3533 { 3534 u8 *cmd = scp->cmnd; 3535 u8 *lrdp = NULL; 3536 u8 *up; 3537 struct sdeb_store_info *sip = devip2sip(devip, true); 3538 rwlock_t *macc_lckp = &sip->macc_lck; 3539 u8 wrprotect; 3540 u16 lbdof, num_lrd, k; 3541 u32 num, num_by, bt_len, lbdof_blen, sg_off, cum_lb; 3542 u32 lb_size = sdebug_sector_size; 3543 u32 ei_lba; 3544 u64 lba; 3545 int ret, res; 3546 bool is_16; 3547 static const u32 lrd_size = 32; /* + parameter list header size */ 3548 3549 if (cmd[0] == VARIABLE_LENGTH_CMD) { 3550 is_16 = false; 3551 wrprotect = (cmd[10] >> 5) & 0x7; 3552 lbdof = get_unaligned_be16(cmd + 12); 3553 num_lrd = get_unaligned_be16(cmd + 16); 3554 bt_len = get_unaligned_be32(cmd + 28); 3555 } else { /* that leaves WRITE SCATTERED(16) */ 3556 is_16 = true; 3557 wrprotect = (cmd[2] >> 5) & 0x7; 3558 lbdof = get_unaligned_be16(cmd + 4); 3559 num_lrd = get_unaligned_be16(cmd + 8); 3560 bt_len = get_unaligned_be32(cmd + 10); 3561 if (unlikely(have_dif_prot)) { 3562 if (sdebug_dif == T10_PI_TYPE2_PROTECTION && 3563 wrprotect) { 3564 mk_sense_invalid_opcode(scp); 3565 return illegal_condition_result; 3566 } 3567 if ((sdebug_dif == T10_PI_TYPE1_PROTECTION || 3568 sdebug_dif == T10_PI_TYPE3_PROTECTION) && 3569 wrprotect == 0) 3570 sdev_printk(KERN_ERR, scp->device, 3571 "Unprotected WR to DIF device\n"); 3572 } 3573 } 3574 if ((num_lrd == 0) || (bt_len == 0)) 3575 return 0; /* T10 says these do-nothings are not errors */ 3576 if (lbdof == 0) { 3577 if (sdebug_verbose) 3578 sdev_printk(KERN_INFO, scp->device, 3579 "%s: %s: LB Data Offset field bad\n", 3580 my_name, __func__); 3581 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0); 3582 return illegal_condition_result; 3583 } 3584 lbdof_blen = lbdof * lb_size; 3585 if ((lrd_size + (num_lrd * lrd_size)) > lbdof_blen) { 3586 if (sdebug_verbose) 3587 sdev_printk(KERN_INFO, scp->device, 3588 "%s: %s: LBA range descriptors don't fit\n", 3589 my_name, __func__); 3590 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0); 3591 return illegal_condition_result; 3592 } 3593 lrdp = kzalloc(lbdof_blen, GFP_ATOMIC); 3594 if (lrdp == NULL) 3595 return SCSI_MLQUEUE_HOST_BUSY; 3596 if (sdebug_verbose) 3597 sdev_printk(KERN_INFO, scp->device, 3598 "%s: %s: Fetch header+scatter_list, lbdof_blen=%u\n", 3599 my_name, __func__, lbdof_blen); 3600 res = fetch_to_dev_buffer(scp, lrdp, lbdof_blen); 3601 if (res == -1) { 3602 ret = DID_ERROR << 16; 3603 goto err_out; 3604 } 3605 3606 write_lock(macc_lckp); 3607 sg_off = lbdof_blen; 3608 /* Spec says Buffer xfer Length field in number of LBs in dout */ 3609 cum_lb = 0; 3610 for (k = 0, up = lrdp + lrd_size; k < num_lrd; ++k, up += lrd_size) { 3611 lba = get_unaligned_be64(up + 0); 3612 num = get_unaligned_be32(up + 8); 3613 if (sdebug_verbose) 3614 sdev_printk(KERN_INFO, scp->device, 3615 "%s: %s: k=%d LBA=0x%llx num=%u sg_off=%u\n", 3616 my_name, __func__, k, lba, num, sg_off); 3617 if (num == 0) 3618 continue; 3619 ret = check_device_access_params(scp, lba, num, true); 3620 if (ret) 3621 goto err_out_unlock; 3622 num_by = num * lb_size; 3623 ei_lba = is_16 ? 0 : get_unaligned_be32(up + 12); 3624 3625 if ((cum_lb + num) > bt_len) { 3626 if (sdebug_verbose) 3627 sdev_printk(KERN_INFO, scp->device, 3628 "%s: %s: sum of blocks > data provided\n", 3629 my_name, __func__); 3630 mk_sense_buffer(scp, ILLEGAL_REQUEST, WRITE_ERROR_ASC, 3631 0); 3632 ret = illegal_condition_result; 3633 goto err_out_unlock; 3634 } 3635 3636 /* DIX + T10 DIF */ 3637 if (unlikely(sdebug_dix && scsi_prot_sg_count(scp))) { 3638 int prot_ret = prot_verify_write(scp, lba, num, 3639 ei_lba); 3640 3641 if (prot_ret) { 3642 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 3643 prot_ret); 3644 ret = illegal_condition_result; 3645 goto err_out_unlock; 3646 } 3647 } 3648 3649 ret = do_device_access(sip, scp, sg_off, lba, num, true); 3650 /* If ZBC zone then bump its write pointer */ 3651 if (sdebug_dev_is_zoned(devip)) 3652 zbc_inc_wp(devip, lba, num); 3653 if (unlikely(scsi_debug_lbp())) 3654 map_region(sip, lba, num); 3655 if (unlikely(-1 == ret)) { 3656 ret = DID_ERROR << 16; 3657 goto err_out_unlock; 3658 } else if (unlikely(sdebug_verbose && (ret < num_by))) 3659 sdev_printk(KERN_INFO, scp->device, 3660 "%s: write: cdb indicated=%u, IO sent=%d bytes\n", 3661 my_name, num_by, ret); 3662 3663 if (unlikely((sdebug_opts & SDEBUG_OPT_RECOV_DIF_DIX) && 3664 atomic_read(&sdeb_inject_pending))) { 3665 if (sdebug_opts & SDEBUG_OPT_RECOVERED_ERR) { 3666 mk_sense_buffer(scp, RECOVERED_ERROR, THRESHOLD_EXCEEDED, 0); 3667 atomic_set(&sdeb_inject_pending, 0); 3668 ret = check_condition_result; 3669 goto err_out_unlock; 3670 } else if (sdebug_opts & SDEBUG_OPT_DIF_ERR) { 3671 /* Logical block guard check failed */ 3672 mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 1); 3673 atomic_set(&sdeb_inject_pending, 0); 3674 ret = illegal_condition_result; 3675 goto err_out_unlock; 3676 } else if (sdebug_opts & SDEBUG_OPT_DIX_ERR) { 3677 mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 1); 3678 atomic_set(&sdeb_inject_pending, 0); 3679 ret = illegal_condition_result; 3680 goto err_out_unlock; 3681 } 3682 } 3683 sg_off += num_by; 3684 cum_lb += num; 3685 } 3686 ret = 0; 3687 err_out_unlock: 3688 write_unlock(macc_lckp); 3689 err_out: 3690 kfree(lrdp); 3691 return ret; 3692 } 3693 3694 static int resp_write_same(struct scsi_cmnd *scp, u64 lba, u32 num, 3695 u32 ei_lba, bool unmap, bool ndob) 3696 { 3697 struct scsi_device *sdp = scp->device; 3698 struct sdebug_dev_info *devip = (struct sdebug_dev_info *)sdp->hostdata; 3699 unsigned long long i; 3700 u64 block, lbaa; 3701 u32 lb_size = sdebug_sector_size; 3702 int ret; 3703 struct sdeb_store_info *sip = devip2sip((struct sdebug_dev_info *) 3704 scp->device->hostdata, true); 3705 rwlock_t *macc_lckp = &sip->macc_lck; 3706 u8 *fs1p; 3707 u8 *fsp; 3708 3709 write_lock(macc_lckp); 3710 3711 ret = check_device_access_params(scp, lba, num, true); 3712 if (ret) { 3713 write_unlock(macc_lckp); 3714 return ret; 3715 } 3716 3717 if (unmap && scsi_debug_lbp()) { 3718 unmap_region(sip, lba, num); 3719 goto out; 3720 } 3721 lbaa = lba; 3722 block = do_div(lbaa, sdebug_store_sectors); 3723 /* if ndob then zero 1 logical block, else fetch 1 logical block */ 3724 fsp = sip->storep; 3725 fs1p = fsp + (block * lb_size); 3726 if (ndob) { 3727 memset(fs1p, 0, lb_size); 3728 ret = 0; 3729 } else 3730 ret = fetch_to_dev_buffer(scp, fs1p, lb_size); 3731 3732 if (-1 == ret) { 3733 write_unlock(&sip->macc_lck); 3734 return DID_ERROR << 16; 3735 } else if (sdebug_verbose && !ndob && (ret < lb_size)) 3736 sdev_printk(KERN_INFO, scp->device, 3737 "%s: %s: lb size=%u, IO sent=%d bytes\n", 3738 my_name, "write same", lb_size, ret); 3739 3740 /* Copy first sector to remaining blocks */ 3741 for (i = 1 ; i < num ; i++) { 3742 lbaa = lba + i; 3743 block = do_div(lbaa, sdebug_store_sectors); 3744 memmove(fsp + (block * lb_size), fs1p, lb_size); 3745 } 3746 if (scsi_debug_lbp()) 3747 map_region(sip, lba, num); 3748 /* If ZBC zone then bump its write pointer */ 3749 if (sdebug_dev_is_zoned(devip)) 3750 zbc_inc_wp(devip, lba, num); 3751 out: 3752 write_unlock(macc_lckp); 3753 3754 return 0; 3755 } 3756 3757 static int resp_write_same_10(struct scsi_cmnd *scp, 3758 struct sdebug_dev_info *devip) 3759 { 3760 u8 *cmd = scp->cmnd; 3761 u32 lba; 3762 u16 num; 3763 u32 ei_lba = 0; 3764 bool unmap = false; 3765 3766 if (cmd[1] & 0x8) { 3767 if (sdebug_lbpws10 == 0) { 3768 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 3); 3769 return check_condition_result; 3770 } else 3771 unmap = true; 3772 } 3773 lba = get_unaligned_be32(cmd + 2); 3774 num = get_unaligned_be16(cmd + 7); 3775 if (num > sdebug_write_same_length) { 3776 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 7, -1); 3777 return check_condition_result; 3778 } 3779 return resp_write_same(scp, lba, num, ei_lba, unmap, false); 3780 } 3781 3782 static int resp_write_same_16(struct scsi_cmnd *scp, 3783 struct sdebug_dev_info *devip) 3784 { 3785 u8 *cmd = scp->cmnd; 3786 u64 lba; 3787 u32 num; 3788 u32 ei_lba = 0; 3789 bool unmap = false; 3790 bool ndob = false; 3791 3792 if (cmd[1] & 0x8) { /* UNMAP */ 3793 if (sdebug_lbpws == 0) { 3794 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 3); 3795 return check_condition_result; 3796 } else 3797 unmap = true; 3798 } 3799 if (cmd[1] & 0x1) /* NDOB (no data-out buffer, assumes zeroes) */ 3800 ndob = true; 3801 lba = get_unaligned_be64(cmd + 2); 3802 num = get_unaligned_be32(cmd + 10); 3803 if (num > sdebug_write_same_length) { 3804 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 10, -1); 3805 return check_condition_result; 3806 } 3807 return resp_write_same(scp, lba, num, ei_lba, unmap, ndob); 3808 } 3809 3810 /* Note the mode field is in the same position as the (lower) service action 3811 * field. For the Report supported operation codes command, SPC-4 suggests 3812 * each mode of this command should be reported separately; for future. */ 3813 static int resp_write_buffer(struct scsi_cmnd *scp, 3814 struct sdebug_dev_info *devip) 3815 { 3816 u8 *cmd = scp->cmnd; 3817 struct scsi_device *sdp = scp->device; 3818 struct sdebug_dev_info *dp; 3819 u8 mode; 3820 3821 mode = cmd[1] & 0x1f; 3822 switch (mode) { 3823 case 0x4: /* download microcode (MC) and activate (ACT) */ 3824 /* set UAs on this device only */ 3825 set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm); 3826 set_bit(SDEBUG_UA_MICROCODE_CHANGED, devip->uas_bm); 3827 break; 3828 case 0x5: /* download MC, save and ACT */ 3829 set_bit(SDEBUG_UA_MICROCODE_CHANGED_WO_RESET, devip->uas_bm); 3830 break; 3831 case 0x6: /* download MC with offsets and ACT */ 3832 /* set UAs on most devices (LUs) in this target */ 3833 list_for_each_entry(dp, 3834 &devip->sdbg_host->dev_info_list, 3835 dev_list) 3836 if (dp->target == sdp->id) { 3837 set_bit(SDEBUG_UA_BUS_RESET, dp->uas_bm); 3838 if (devip != dp) 3839 set_bit(SDEBUG_UA_MICROCODE_CHANGED, 3840 dp->uas_bm); 3841 } 3842 break; 3843 case 0x7: /* download MC with offsets, save, and ACT */ 3844 /* set UA on all devices (LUs) in this target */ 3845 list_for_each_entry(dp, 3846 &devip->sdbg_host->dev_info_list, 3847 dev_list) 3848 if (dp->target == sdp->id) 3849 set_bit(SDEBUG_UA_MICROCODE_CHANGED_WO_RESET, 3850 dp->uas_bm); 3851 break; 3852 default: 3853 /* do nothing for this command for other mode values */ 3854 break; 3855 } 3856 return 0; 3857 } 3858 3859 static int resp_comp_write(struct scsi_cmnd *scp, 3860 struct sdebug_dev_info *devip) 3861 { 3862 u8 *cmd = scp->cmnd; 3863 u8 *arr; 3864 struct sdeb_store_info *sip = devip2sip(devip, true); 3865 rwlock_t *macc_lckp = &sip->macc_lck; 3866 u64 lba; 3867 u32 dnum; 3868 u32 lb_size = sdebug_sector_size; 3869 u8 num; 3870 int ret; 3871 int retval = 0; 3872 3873 lba = get_unaligned_be64(cmd + 2); 3874 num = cmd[13]; /* 1 to a maximum of 255 logical blocks */ 3875 if (0 == num) 3876 return 0; /* degenerate case, not an error */ 3877 if (sdebug_dif == T10_PI_TYPE2_PROTECTION && 3878 (cmd[1] & 0xe0)) { 3879 mk_sense_invalid_opcode(scp); 3880 return check_condition_result; 3881 } 3882 if ((sdebug_dif == T10_PI_TYPE1_PROTECTION || 3883 sdebug_dif == T10_PI_TYPE3_PROTECTION) && 3884 (cmd[1] & 0xe0) == 0) 3885 sdev_printk(KERN_ERR, scp->device, "Unprotected WR " 3886 "to DIF device\n"); 3887 ret = check_device_access_params(scp, lba, num, false); 3888 if (ret) 3889 return ret; 3890 dnum = 2 * num; 3891 arr = kcalloc(lb_size, dnum, GFP_ATOMIC); 3892 if (NULL == arr) { 3893 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC, 3894 INSUFF_RES_ASCQ); 3895 return check_condition_result; 3896 } 3897 3898 write_lock(macc_lckp); 3899 3900 ret = do_dout_fetch(scp, dnum, arr); 3901 if (ret == -1) { 3902 retval = DID_ERROR << 16; 3903 goto cleanup; 3904 } else if (sdebug_verbose && (ret < (dnum * lb_size))) 3905 sdev_printk(KERN_INFO, scp->device, "%s: compare_write: cdb " 3906 "indicated=%u, IO sent=%d bytes\n", my_name, 3907 dnum * lb_size, ret); 3908 if (!comp_write_worker(sip, lba, num, arr, false)) { 3909 mk_sense_buffer(scp, MISCOMPARE, MISCOMPARE_VERIFY_ASC, 0); 3910 retval = check_condition_result; 3911 goto cleanup; 3912 } 3913 if (scsi_debug_lbp()) 3914 map_region(sip, lba, num); 3915 cleanup: 3916 write_unlock(macc_lckp); 3917 kfree(arr); 3918 return retval; 3919 } 3920 3921 struct unmap_block_desc { 3922 __be64 lba; 3923 __be32 blocks; 3924 __be32 __reserved; 3925 }; 3926 3927 static int resp_unmap(struct scsi_cmnd *scp, struct sdebug_dev_info *devip) 3928 { 3929 unsigned char *buf; 3930 struct unmap_block_desc *desc; 3931 struct sdeb_store_info *sip = devip2sip(devip, true); 3932 rwlock_t *macc_lckp = &sip->macc_lck; 3933 unsigned int i, payload_len, descriptors; 3934 int ret; 3935 3936 if (!scsi_debug_lbp()) 3937 return 0; /* fib and say its done */ 3938 payload_len = get_unaligned_be16(scp->cmnd + 7); 3939 BUG_ON(scsi_bufflen(scp) != payload_len); 3940 3941 descriptors = (payload_len - 8) / 16; 3942 if (descriptors > sdebug_unmap_max_desc) { 3943 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 7, -1); 3944 return check_condition_result; 3945 } 3946 3947 buf = kzalloc(scsi_bufflen(scp), GFP_ATOMIC); 3948 if (!buf) { 3949 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC, 3950 INSUFF_RES_ASCQ); 3951 return check_condition_result; 3952 } 3953 3954 scsi_sg_copy_to_buffer(scp, buf, scsi_bufflen(scp)); 3955 3956 BUG_ON(get_unaligned_be16(&buf[0]) != payload_len - 2); 3957 BUG_ON(get_unaligned_be16(&buf[2]) != descriptors * 16); 3958 3959 desc = (void *)&buf[8]; 3960 3961 write_lock(macc_lckp); 3962 3963 for (i = 0 ; i < descriptors ; i++) { 3964 unsigned long long lba = get_unaligned_be64(&desc[i].lba); 3965 unsigned int num = get_unaligned_be32(&desc[i].blocks); 3966 3967 ret = check_device_access_params(scp, lba, num, true); 3968 if (ret) 3969 goto out; 3970 3971 unmap_region(sip, lba, num); 3972 } 3973 3974 ret = 0; 3975 3976 out: 3977 write_unlock(macc_lckp); 3978 kfree(buf); 3979 3980 return ret; 3981 } 3982 3983 #define SDEBUG_GET_LBA_STATUS_LEN 32 3984 3985 static int resp_get_lba_status(struct scsi_cmnd *scp, 3986 struct sdebug_dev_info *devip) 3987 { 3988 u8 *cmd = scp->cmnd; 3989 u64 lba; 3990 u32 alloc_len, mapped, num; 3991 int ret; 3992 u8 arr[SDEBUG_GET_LBA_STATUS_LEN]; 3993 3994 lba = get_unaligned_be64(cmd + 2); 3995 alloc_len = get_unaligned_be32(cmd + 10); 3996 3997 if (alloc_len < 24) 3998 return 0; 3999 4000 ret = check_device_access_params(scp, lba, 1, false); 4001 if (ret) 4002 return ret; 4003 4004 if (scsi_debug_lbp()) { 4005 struct sdeb_store_info *sip = devip2sip(devip, true); 4006 4007 mapped = map_state(sip, lba, &num); 4008 } else { 4009 mapped = 1; 4010 /* following just in case virtual_gb changed */ 4011 sdebug_capacity = get_sdebug_capacity(); 4012 if (sdebug_capacity - lba <= 0xffffffff) 4013 num = sdebug_capacity - lba; 4014 else 4015 num = 0xffffffff; 4016 } 4017 4018 memset(arr, 0, SDEBUG_GET_LBA_STATUS_LEN); 4019 put_unaligned_be32(20, arr); /* Parameter Data Length */ 4020 put_unaligned_be64(lba, arr + 8); /* LBA */ 4021 put_unaligned_be32(num, arr + 16); /* Number of blocks */ 4022 arr[20] = !mapped; /* prov_stat=0: mapped; 1: dealloc */ 4023 4024 return fill_from_dev_buffer(scp, arr, SDEBUG_GET_LBA_STATUS_LEN); 4025 } 4026 4027 static int resp_sync_cache(struct scsi_cmnd *scp, 4028 struct sdebug_dev_info *devip) 4029 { 4030 int res = 0; 4031 u64 lba; 4032 u32 num_blocks; 4033 u8 *cmd = scp->cmnd; 4034 4035 if (cmd[0] == SYNCHRONIZE_CACHE) { /* 10 byte cdb */ 4036 lba = get_unaligned_be32(cmd + 2); 4037 num_blocks = get_unaligned_be16(cmd + 7); 4038 } else { /* SYNCHRONIZE_CACHE(16) */ 4039 lba = get_unaligned_be64(cmd + 2); 4040 num_blocks = get_unaligned_be32(cmd + 10); 4041 } 4042 if (lba + num_blocks > sdebug_capacity) { 4043 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0); 4044 return check_condition_result; 4045 } 4046 if (!write_since_sync || (cmd[1] & 0x2)) 4047 res = SDEG_RES_IMMED_MASK; 4048 else /* delay if write_since_sync and IMMED clear */ 4049 write_since_sync = false; 4050 return res; 4051 } 4052 4053 /* 4054 * Assuming the LBA+num_blocks is not out-of-range, this function will return 4055 * CONDITION MET if the specified blocks will/have fitted in the cache, and 4056 * a GOOD status otherwise. Model a disk with a big cache and yield 4057 * CONDITION MET. Actually tries to bring range in main memory into the 4058 * cache associated with the CPU(s). 4059 */ 4060 static int resp_pre_fetch(struct scsi_cmnd *scp, 4061 struct sdebug_dev_info *devip) 4062 { 4063 int res = 0; 4064 u64 lba; 4065 u64 block, rest = 0; 4066 u32 nblks; 4067 u8 *cmd = scp->cmnd; 4068 struct sdeb_store_info *sip = devip2sip(devip, true); 4069 rwlock_t *macc_lckp = &sip->macc_lck; 4070 u8 *fsp = sip->storep; 4071 4072 if (cmd[0] == PRE_FETCH) { /* 10 byte cdb */ 4073 lba = get_unaligned_be32(cmd + 2); 4074 nblks = get_unaligned_be16(cmd + 7); 4075 } else { /* PRE-FETCH(16) */ 4076 lba = get_unaligned_be64(cmd + 2); 4077 nblks = get_unaligned_be32(cmd + 10); 4078 } 4079 if (lba + nblks > sdebug_capacity) { 4080 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0); 4081 return check_condition_result; 4082 } 4083 if (!fsp) 4084 goto fini; 4085 /* PRE-FETCH spec says nothing about LBP or PI so skip them */ 4086 block = do_div(lba, sdebug_store_sectors); 4087 if (block + nblks > sdebug_store_sectors) 4088 rest = block + nblks - sdebug_store_sectors; 4089 4090 /* Try to bring the PRE-FETCH range into CPU's cache */ 4091 read_lock(macc_lckp); 4092 prefetch_range(fsp + (sdebug_sector_size * block), 4093 (nblks - rest) * sdebug_sector_size); 4094 if (rest) 4095 prefetch_range(fsp, rest * sdebug_sector_size); 4096 read_unlock(macc_lckp); 4097 fini: 4098 if (cmd[1] & 0x2) 4099 res = SDEG_RES_IMMED_MASK; 4100 return res | condition_met_result; 4101 } 4102 4103 #define RL_BUCKET_ELEMS 8 4104 4105 /* Even though each pseudo target has a REPORT LUNS "well known logical unit" 4106 * (W-LUN), the normal Linux scanning logic does not associate it with a 4107 * device (e.g. /dev/sg7). The following magic will make that association: 4108 * "cd /sys/class/scsi_host/host<n> ; echo '- - 49409' > scan" 4109 * where <n> is a host number. If there are multiple targets in a host then 4110 * the above will associate a W-LUN to each target. To only get a W-LUN 4111 * for target 2, then use "echo '- 2 49409' > scan" . 4112 */ 4113 static int resp_report_luns(struct scsi_cmnd *scp, 4114 struct sdebug_dev_info *devip) 4115 { 4116 unsigned char *cmd = scp->cmnd; 4117 unsigned int alloc_len; 4118 unsigned char select_report; 4119 u64 lun; 4120 struct scsi_lun *lun_p; 4121 u8 arr[RL_BUCKET_ELEMS * sizeof(struct scsi_lun)]; 4122 unsigned int lun_cnt; /* normal LUN count (max: 256) */ 4123 unsigned int wlun_cnt; /* report luns W-LUN count */ 4124 unsigned int tlun_cnt; /* total LUN count */ 4125 unsigned int rlen; /* response length (in bytes) */ 4126 int k, j, n, res; 4127 unsigned int off_rsp = 0; 4128 const int sz_lun = sizeof(struct scsi_lun); 4129 4130 clear_luns_changed_on_target(devip); 4131 4132 select_report = cmd[2]; 4133 alloc_len = get_unaligned_be32(cmd + 6); 4134 4135 if (alloc_len < 4) { 4136 pr_err("alloc len too small %d\n", alloc_len); 4137 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 6, -1); 4138 return check_condition_result; 4139 } 4140 4141 switch (select_report) { 4142 case 0: /* all LUNs apart from W-LUNs */ 4143 lun_cnt = sdebug_max_luns; 4144 wlun_cnt = 0; 4145 break; 4146 case 1: /* only W-LUNs */ 4147 lun_cnt = 0; 4148 wlun_cnt = 1; 4149 break; 4150 case 2: /* all LUNs */ 4151 lun_cnt = sdebug_max_luns; 4152 wlun_cnt = 1; 4153 break; 4154 case 0x10: /* only administrative LUs */ 4155 case 0x11: /* see SPC-5 */ 4156 case 0x12: /* only subsiduary LUs owned by referenced LU */ 4157 default: 4158 pr_debug("select report invalid %d\n", select_report); 4159 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, -1); 4160 return check_condition_result; 4161 } 4162 4163 if (sdebug_no_lun_0 && (lun_cnt > 0)) 4164 --lun_cnt; 4165 4166 tlun_cnt = lun_cnt + wlun_cnt; 4167 rlen = tlun_cnt * sz_lun; /* excluding 8 byte header */ 4168 scsi_set_resid(scp, scsi_bufflen(scp)); 4169 pr_debug("select_report %d luns = %d wluns = %d no_lun0 %d\n", 4170 select_report, lun_cnt, wlun_cnt, sdebug_no_lun_0); 4171 4172 /* loops rely on sizeof response header same as sizeof lun (both 8) */ 4173 lun = sdebug_no_lun_0 ? 1 : 0; 4174 for (k = 0, j = 0, res = 0; true; ++k, j = 0) { 4175 memset(arr, 0, sizeof(arr)); 4176 lun_p = (struct scsi_lun *)&arr[0]; 4177 if (k == 0) { 4178 put_unaligned_be32(rlen, &arr[0]); 4179 ++lun_p; 4180 j = 1; 4181 } 4182 for ( ; j < RL_BUCKET_ELEMS; ++j, ++lun_p) { 4183 if ((k * RL_BUCKET_ELEMS) + j > lun_cnt) 4184 break; 4185 int_to_scsilun(lun++, lun_p); 4186 if (lun > 1 && sdebug_lun_am == SAM_LUN_AM_FLAT) 4187 lun_p->scsi_lun[0] |= 0x40; 4188 } 4189 if (j < RL_BUCKET_ELEMS) 4190 break; 4191 n = j * sz_lun; 4192 res = p_fill_from_dev_buffer(scp, arr, n, off_rsp); 4193 if (res) 4194 return res; 4195 off_rsp += n; 4196 } 4197 if (wlun_cnt) { 4198 int_to_scsilun(SCSI_W_LUN_REPORT_LUNS, lun_p); 4199 ++j; 4200 } 4201 if (j > 0) 4202 res = p_fill_from_dev_buffer(scp, arr, j * sz_lun, off_rsp); 4203 return res; 4204 } 4205 4206 static int resp_verify(struct scsi_cmnd *scp, struct sdebug_dev_info *devip) 4207 { 4208 bool is_bytchk3 = false; 4209 u8 bytchk; 4210 int ret, j; 4211 u32 vnum, a_num, off; 4212 const u32 lb_size = sdebug_sector_size; 4213 u64 lba; 4214 u8 *arr; 4215 u8 *cmd = scp->cmnd; 4216 struct sdeb_store_info *sip = devip2sip(devip, true); 4217 rwlock_t *macc_lckp = &sip->macc_lck; 4218 4219 bytchk = (cmd[1] >> 1) & 0x3; 4220 if (bytchk == 0) { 4221 return 0; /* always claim internal verify okay */ 4222 } else if (bytchk == 2) { 4223 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 2); 4224 return check_condition_result; 4225 } else if (bytchk == 3) { 4226 is_bytchk3 = true; /* 1 block sent, compared repeatedly */ 4227 } 4228 switch (cmd[0]) { 4229 case VERIFY_16: 4230 lba = get_unaligned_be64(cmd + 2); 4231 vnum = get_unaligned_be32(cmd + 10); 4232 break; 4233 case VERIFY: /* is VERIFY(10) */ 4234 lba = get_unaligned_be32(cmd + 2); 4235 vnum = get_unaligned_be16(cmd + 7); 4236 break; 4237 default: 4238 mk_sense_invalid_opcode(scp); 4239 return check_condition_result; 4240 } 4241 a_num = is_bytchk3 ? 1 : vnum; 4242 /* Treat following check like one for read (i.e. no write) access */ 4243 ret = check_device_access_params(scp, lba, a_num, false); 4244 if (ret) 4245 return ret; 4246 4247 arr = kcalloc(lb_size, vnum, GFP_ATOMIC); 4248 if (!arr) { 4249 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC, 4250 INSUFF_RES_ASCQ); 4251 return check_condition_result; 4252 } 4253 /* Not changing store, so only need read access */ 4254 read_lock(macc_lckp); 4255 4256 ret = do_dout_fetch(scp, a_num, arr); 4257 if (ret == -1) { 4258 ret = DID_ERROR << 16; 4259 goto cleanup; 4260 } else if (sdebug_verbose && (ret < (a_num * lb_size))) { 4261 sdev_printk(KERN_INFO, scp->device, 4262 "%s: %s: cdb indicated=%u, IO sent=%d bytes\n", 4263 my_name, __func__, a_num * lb_size, ret); 4264 } 4265 if (is_bytchk3) { 4266 for (j = 1, off = lb_size; j < vnum; ++j, off += lb_size) 4267 memcpy(arr + off, arr, lb_size); 4268 } 4269 ret = 0; 4270 if (!comp_write_worker(sip, lba, vnum, arr, true)) { 4271 mk_sense_buffer(scp, MISCOMPARE, MISCOMPARE_VERIFY_ASC, 0); 4272 ret = check_condition_result; 4273 goto cleanup; 4274 } 4275 cleanup: 4276 read_unlock(macc_lckp); 4277 kfree(arr); 4278 return ret; 4279 } 4280 4281 #define RZONES_DESC_HD 64 4282 4283 /* Report zones depending on start LBA nad reporting options */ 4284 static int resp_report_zones(struct scsi_cmnd *scp, 4285 struct sdebug_dev_info *devip) 4286 { 4287 unsigned int i, max_zones, rep_max_zones, nrz = 0; 4288 int ret = 0; 4289 u32 alloc_len, rep_opts, rep_len; 4290 bool partial; 4291 u64 lba, zs_lba; 4292 u8 *arr = NULL, *desc; 4293 u8 *cmd = scp->cmnd; 4294 struct sdeb_zone_state *zsp; 4295 struct sdeb_store_info *sip = devip2sip(devip, false); 4296 rwlock_t *macc_lckp = sip ? &sip->macc_lck : &sdeb_fake_rw_lck; 4297 4298 if (!sdebug_dev_is_zoned(devip)) { 4299 mk_sense_invalid_opcode(scp); 4300 return check_condition_result; 4301 } 4302 zs_lba = get_unaligned_be64(cmd + 2); 4303 alloc_len = get_unaligned_be32(cmd + 10); 4304 rep_opts = cmd[14] & 0x3f; 4305 partial = cmd[14] & 0x80; 4306 4307 if (zs_lba >= sdebug_capacity) { 4308 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0); 4309 return check_condition_result; 4310 } 4311 4312 max_zones = devip->nr_zones - (zs_lba >> devip->zsize_shift); 4313 rep_max_zones = min((alloc_len - 64) >> ilog2(RZONES_DESC_HD), 4314 max_zones); 4315 4316 arr = kcalloc(RZONES_DESC_HD, alloc_len, GFP_ATOMIC); 4317 if (!arr) { 4318 mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC, 4319 INSUFF_RES_ASCQ); 4320 return check_condition_result; 4321 } 4322 4323 read_lock(macc_lckp); 4324 4325 desc = arr + 64; 4326 for (i = 0; i < max_zones; i++) { 4327 lba = zs_lba + devip->zsize * i; 4328 if (lba > sdebug_capacity) 4329 break; 4330 zsp = zbc_zone(devip, lba); 4331 switch (rep_opts) { 4332 case 0x00: 4333 /* All zones */ 4334 break; 4335 case 0x01: 4336 /* Empty zones */ 4337 if (zsp->z_cond != ZC1_EMPTY) 4338 continue; 4339 break; 4340 case 0x02: 4341 /* Implicit open zones */ 4342 if (zsp->z_cond != ZC2_IMPLICIT_OPEN) 4343 continue; 4344 break; 4345 case 0x03: 4346 /* Explicit open zones */ 4347 if (zsp->z_cond != ZC3_EXPLICIT_OPEN) 4348 continue; 4349 break; 4350 case 0x04: 4351 /* Closed zones */ 4352 if (zsp->z_cond != ZC4_CLOSED) 4353 continue; 4354 break; 4355 case 0x05: 4356 /* Full zones */ 4357 if (zsp->z_cond != ZC5_FULL) 4358 continue; 4359 break; 4360 case 0x06: 4361 case 0x07: 4362 case 0x10: 4363 /* 4364 * Read-only, offline, reset WP recommended are 4365 * not emulated: no zones to report; 4366 */ 4367 continue; 4368 case 0x11: 4369 /* non-seq-resource set */ 4370 if (!zsp->z_non_seq_resource) 4371 continue; 4372 break; 4373 case 0x3f: 4374 /* Not write pointer (conventional) zones */ 4375 if (!zbc_zone_is_conv(zsp)) 4376 continue; 4377 break; 4378 default: 4379 mk_sense_buffer(scp, ILLEGAL_REQUEST, 4380 INVALID_FIELD_IN_CDB, 0); 4381 ret = check_condition_result; 4382 goto fini; 4383 } 4384 4385 if (nrz < rep_max_zones) { 4386 /* Fill zone descriptor */ 4387 desc[0] = zsp->z_type; 4388 desc[1] = zsp->z_cond << 4; 4389 if (zsp->z_non_seq_resource) 4390 desc[1] |= 1 << 1; 4391 put_unaligned_be64((u64)zsp->z_size, desc + 8); 4392 put_unaligned_be64((u64)zsp->z_start, desc + 16); 4393 put_unaligned_be64((u64)zsp->z_wp, desc + 24); 4394 desc += 64; 4395 } 4396 4397 if (partial && nrz >= rep_max_zones) 4398 break; 4399 4400 nrz++; 4401 } 4402 4403 /* Report header */ 4404 put_unaligned_be32(nrz * RZONES_DESC_HD, arr + 0); 4405 put_unaligned_be64(sdebug_capacity - 1, arr + 8); 4406 4407 rep_len = (unsigned long)desc - (unsigned long)arr; 4408 ret = fill_from_dev_buffer(scp, arr, min_t(int, alloc_len, rep_len)); 4409 4410 fini: 4411 read_unlock(macc_lckp); 4412 kfree(arr); 4413 return ret; 4414 } 4415 4416 /* Logic transplanted from tcmu-runner, file_zbc.c */ 4417 static void zbc_open_all(struct sdebug_dev_info *devip) 4418 { 4419 struct sdeb_zone_state *zsp = &devip->zstate[0]; 4420 unsigned int i; 4421 4422 for (i = 0; i < devip->nr_zones; i++, zsp++) { 4423 if (zsp->z_cond == ZC4_CLOSED) 4424 zbc_open_zone(devip, &devip->zstate[i], true); 4425 } 4426 } 4427 4428 static int resp_open_zone(struct scsi_cmnd *scp, struct sdebug_dev_info *devip) 4429 { 4430 int res = 0; 4431 u64 z_id; 4432 enum sdebug_z_cond zc; 4433 u8 *cmd = scp->cmnd; 4434 struct sdeb_zone_state *zsp; 4435 bool all = cmd[14] & 0x01; 4436 struct sdeb_store_info *sip = devip2sip(devip, false); 4437 rwlock_t *macc_lckp = sip ? &sip->macc_lck : &sdeb_fake_rw_lck; 4438 4439 if (!sdebug_dev_is_zoned(devip)) { 4440 mk_sense_invalid_opcode(scp); 4441 return check_condition_result; 4442 } 4443 4444 write_lock(macc_lckp); 4445 4446 if (all) { 4447 /* Check if all closed zones can be open */ 4448 if (devip->max_open && 4449 devip->nr_exp_open + devip->nr_closed > devip->max_open) { 4450 mk_sense_buffer(scp, DATA_PROTECT, INSUFF_RES_ASC, 4451 INSUFF_ZONE_ASCQ); 4452 res = check_condition_result; 4453 goto fini; 4454 } 4455 /* Open all closed zones */ 4456 zbc_open_all(devip); 4457 goto fini; 4458 } 4459 4460 /* Open the specified zone */ 4461 z_id = get_unaligned_be64(cmd + 2); 4462 if (z_id >= sdebug_capacity) { 4463 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0); 4464 res = check_condition_result; 4465 goto fini; 4466 } 4467 4468 zsp = zbc_zone(devip, z_id); 4469 if (z_id != zsp->z_start) { 4470 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0); 4471 res = check_condition_result; 4472 goto fini; 4473 } 4474 if (zbc_zone_is_conv(zsp)) { 4475 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0); 4476 res = check_condition_result; 4477 goto fini; 4478 } 4479 4480 zc = zsp->z_cond; 4481 if (zc == ZC3_EXPLICIT_OPEN || zc == ZC5_FULL) 4482 goto fini; 4483 4484 if (devip->max_open && devip->nr_exp_open >= devip->max_open) { 4485 mk_sense_buffer(scp, DATA_PROTECT, INSUFF_RES_ASC, 4486 INSUFF_ZONE_ASCQ); 4487 res = check_condition_result; 4488 goto fini; 4489 } 4490 4491 zbc_open_zone(devip, zsp, true); 4492 fini: 4493 write_unlock(macc_lckp); 4494 return res; 4495 } 4496 4497 static void zbc_close_all(struct sdebug_dev_info *devip) 4498 { 4499 unsigned int i; 4500 4501 for (i = 0; i < devip->nr_zones; i++) 4502 zbc_close_zone(devip, &devip->zstate[i]); 4503 } 4504 4505 static int resp_close_zone(struct scsi_cmnd *scp, 4506 struct sdebug_dev_info *devip) 4507 { 4508 int res = 0; 4509 u64 z_id; 4510 u8 *cmd = scp->cmnd; 4511 struct sdeb_zone_state *zsp; 4512 bool all = cmd[14] & 0x01; 4513 struct sdeb_store_info *sip = devip2sip(devip, false); 4514 rwlock_t *macc_lckp = sip ? &sip->macc_lck : &sdeb_fake_rw_lck; 4515 4516 if (!sdebug_dev_is_zoned(devip)) { 4517 mk_sense_invalid_opcode(scp); 4518 return check_condition_result; 4519 } 4520 4521 write_lock(macc_lckp); 4522 4523 if (all) { 4524 zbc_close_all(devip); 4525 goto fini; 4526 } 4527 4528 /* Close specified zone */ 4529 z_id = get_unaligned_be64(cmd + 2); 4530 if (z_id >= sdebug_capacity) { 4531 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0); 4532 res = check_condition_result; 4533 goto fini; 4534 } 4535 4536 zsp = zbc_zone(devip, z_id); 4537 if (z_id != zsp->z_start) { 4538 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0); 4539 res = check_condition_result; 4540 goto fini; 4541 } 4542 if (zbc_zone_is_conv(zsp)) { 4543 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0); 4544 res = check_condition_result; 4545 goto fini; 4546 } 4547 4548 zbc_close_zone(devip, zsp); 4549 fini: 4550 write_unlock(macc_lckp); 4551 return res; 4552 } 4553 4554 static void zbc_finish_zone(struct sdebug_dev_info *devip, 4555 struct sdeb_zone_state *zsp, bool empty) 4556 { 4557 enum sdebug_z_cond zc = zsp->z_cond; 4558 4559 if (zc == ZC4_CLOSED || zc == ZC2_IMPLICIT_OPEN || 4560 zc == ZC3_EXPLICIT_OPEN || (empty && zc == ZC1_EMPTY)) { 4561 if (zc == ZC2_IMPLICIT_OPEN || zc == ZC3_EXPLICIT_OPEN) 4562 zbc_close_zone(devip, zsp); 4563 if (zsp->z_cond == ZC4_CLOSED) 4564 devip->nr_closed--; 4565 zsp->z_wp = zsp->z_start + zsp->z_size; 4566 zsp->z_cond = ZC5_FULL; 4567 } 4568 } 4569 4570 static void zbc_finish_all(struct sdebug_dev_info *devip) 4571 { 4572 unsigned int i; 4573 4574 for (i = 0; i < devip->nr_zones; i++) 4575 zbc_finish_zone(devip, &devip->zstate[i], false); 4576 } 4577 4578 static int resp_finish_zone(struct scsi_cmnd *scp, 4579 struct sdebug_dev_info *devip) 4580 { 4581 struct sdeb_zone_state *zsp; 4582 int res = 0; 4583 u64 z_id; 4584 u8 *cmd = scp->cmnd; 4585 bool all = cmd[14] & 0x01; 4586 struct sdeb_store_info *sip = devip2sip(devip, false); 4587 rwlock_t *macc_lckp = sip ? &sip->macc_lck : &sdeb_fake_rw_lck; 4588 4589 if (!sdebug_dev_is_zoned(devip)) { 4590 mk_sense_invalid_opcode(scp); 4591 return check_condition_result; 4592 } 4593 4594 write_lock(macc_lckp); 4595 4596 if (all) { 4597 zbc_finish_all(devip); 4598 goto fini; 4599 } 4600 4601 /* Finish the specified zone */ 4602 z_id = get_unaligned_be64(cmd + 2); 4603 if (z_id >= sdebug_capacity) { 4604 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0); 4605 res = check_condition_result; 4606 goto fini; 4607 } 4608 4609 zsp = zbc_zone(devip, z_id); 4610 if (z_id != zsp->z_start) { 4611 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0); 4612 res = check_condition_result; 4613 goto fini; 4614 } 4615 if (zbc_zone_is_conv(zsp)) { 4616 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0); 4617 res = check_condition_result; 4618 goto fini; 4619 } 4620 4621 zbc_finish_zone(devip, zsp, true); 4622 fini: 4623 write_unlock(macc_lckp); 4624 return res; 4625 } 4626 4627 static void zbc_rwp_zone(struct sdebug_dev_info *devip, 4628 struct sdeb_zone_state *zsp) 4629 { 4630 enum sdebug_z_cond zc; 4631 4632 if (zbc_zone_is_conv(zsp)) 4633 return; 4634 4635 zc = zsp->z_cond; 4636 if (zc == ZC2_IMPLICIT_OPEN || zc == ZC3_EXPLICIT_OPEN) 4637 zbc_close_zone(devip, zsp); 4638 4639 if (zsp->z_cond == ZC4_CLOSED) 4640 devip->nr_closed--; 4641 4642 zsp->z_non_seq_resource = false; 4643 zsp->z_wp = zsp->z_start; 4644 zsp->z_cond = ZC1_EMPTY; 4645 } 4646 4647 static void zbc_rwp_all(struct sdebug_dev_info *devip) 4648 { 4649 unsigned int i; 4650 4651 for (i = 0; i < devip->nr_zones; i++) 4652 zbc_rwp_zone(devip, &devip->zstate[i]); 4653 } 4654 4655 static int resp_rwp_zone(struct scsi_cmnd *scp, struct sdebug_dev_info *devip) 4656 { 4657 struct sdeb_zone_state *zsp; 4658 int res = 0; 4659 u64 z_id; 4660 u8 *cmd = scp->cmnd; 4661 bool all = cmd[14] & 0x01; 4662 struct sdeb_store_info *sip = devip2sip(devip, false); 4663 rwlock_t *macc_lckp = sip ? &sip->macc_lck : &sdeb_fake_rw_lck; 4664 4665 if (!sdebug_dev_is_zoned(devip)) { 4666 mk_sense_invalid_opcode(scp); 4667 return check_condition_result; 4668 } 4669 4670 write_lock(macc_lckp); 4671 4672 if (all) { 4673 zbc_rwp_all(devip); 4674 goto fini; 4675 } 4676 4677 z_id = get_unaligned_be64(cmd + 2); 4678 if (z_id >= sdebug_capacity) { 4679 mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0); 4680 res = check_condition_result; 4681 goto fini; 4682 } 4683 4684 zsp = zbc_zone(devip, z_id); 4685 if (z_id != zsp->z_start) { 4686 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0); 4687 res = check_condition_result; 4688 goto fini; 4689 } 4690 if (zbc_zone_is_conv(zsp)) { 4691 mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0); 4692 res = check_condition_result; 4693 goto fini; 4694 } 4695 4696 zbc_rwp_zone(devip, zsp); 4697 fini: 4698 write_unlock(macc_lckp); 4699 return res; 4700 } 4701 4702 static struct sdebug_queue *get_queue(struct scsi_cmnd *cmnd) 4703 { 4704 u16 hwq; 4705 u32 tag = blk_mq_unique_tag(cmnd->request); 4706 4707 hwq = blk_mq_unique_tag_to_hwq(tag); 4708 4709 pr_debug("tag=%#x, hwq=%d\n", tag, hwq); 4710 if (WARN_ON_ONCE(hwq >= submit_queues)) 4711 hwq = 0; 4712 4713 return sdebug_q_arr + hwq; 4714 } 4715 4716 static u32 get_tag(struct scsi_cmnd *cmnd) 4717 { 4718 return blk_mq_unique_tag(cmnd->request); 4719 } 4720 4721 /* Queued (deferred) command completions converge here. */ 4722 static void sdebug_q_cmd_complete(struct sdebug_defer *sd_dp) 4723 { 4724 bool aborted = sd_dp->aborted; 4725 int qc_idx; 4726 int retiring = 0; 4727 unsigned long iflags; 4728 struct sdebug_queue *sqp; 4729 struct sdebug_queued_cmd *sqcp; 4730 struct scsi_cmnd *scp; 4731 struct sdebug_dev_info *devip; 4732 4733 if (unlikely(aborted)) 4734 sd_dp->aborted = false; 4735 qc_idx = sd_dp->qc_idx; 4736 sqp = sdebug_q_arr + sd_dp->sqa_idx; 4737 if (sdebug_statistics) { 4738 atomic_inc(&sdebug_completions); 4739 if (raw_smp_processor_id() != sd_dp->issuing_cpu) 4740 atomic_inc(&sdebug_miss_cpus); 4741 } 4742 if (unlikely((qc_idx < 0) || (qc_idx >= SDEBUG_CANQUEUE))) { 4743 pr_err("wild qc_idx=%d\n", qc_idx); 4744 return; 4745 } 4746 spin_lock_irqsave(&sqp->qc_lock, iflags); 4747 sd_dp->defer_t = SDEB_DEFER_NONE; 4748 sqcp = &sqp->qc_arr[qc_idx]; 4749 scp = sqcp->a_cmnd; 4750 if (unlikely(scp == NULL)) { 4751 spin_unlock_irqrestore(&sqp->qc_lock, iflags); 4752 pr_err("scp is NULL, sqa_idx=%d, qc_idx=%d, hc_idx=%d\n", 4753 sd_dp->sqa_idx, qc_idx, sd_dp->hc_idx); 4754 return; 4755 } 4756 devip = (struct sdebug_dev_info *)scp->device->hostdata; 4757 if (likely(devip)) 4758 atomic_dec(&devip->num_in_q); 4759 else 4760 pr_err("devip=NULL\n"); 4761 if (unlikely(atomic_read(&retired_max_queue) > 0)) 4762 retiring = 1; 4763 4764 sqcp->a_cmnd = NULL; 4765 if (unlikely(!test_and_clear_bit(qc_idx, sqp->in_use_bm))) { 4766 spin_unlock_irqrestore(&sqp->qc_lock, iflags); 4767 pr_err("Unexpected completion\n"); 4768 return; 4769 } 4770 4771 if (unlikely(retiring)) { /* user has reduced max_queue */ 4772 int k, retval; 4773 4774 retval = atomic_read(&retired_max_queue); 4775 if (qc_idx >= retval) { 4776 spin_unlock_irqrestore(&sqp->qc_lock, iflags); 4777 pr_err("index %d too large\n", retval); 4778 return; 4779 } 4780 k = find_last_bit(sqp->in_use_bm, retval); 4781 if ((k < sdebug_max_queue) || (k == retval)) 4782 atomic_set(&retired_max_queue, 0); 4783 else 4784 atomic_set(&retired_max_queue, k + 1); 4785 } 4786 spin_unlock_irqrestore(&sqp->qc_lock, iflags); 4787 if (unlikely(aborted)) { 4788 if (sdebug_verbose) 4789 pr_info("bypassing scsi_done() due to aborted cmd\n"); 4790 return; 4791 } 4792 scp->scsi_done(scp); /* callback to mid level */ 4793 } 4794 4795 /* When high resolution timer goes off this function is called. */ 4796 static enum hrtimer_restart sdebug_q_cmd_hrt_complete(struct hrtimer *timer) 4797 { 4798 struct sdebug_defer *sd_dp = container_of(timer, struct sdebug_defer, 4799 hrt); 4800 sdebug_q_cmd_complete(sd_dp); 4801 return HRTIMER_NORESTART; 4802 } 4803 4804 /* When work queue schedules work, it calls this function. */ 4805 static void sdebug_q_cmd_wq_complete(struct work_struct *work) 4806 { 4807 struct sdebug_defer *sd_dp = container_of(work, struct sdebug_defer, 4808 ew.work); 4809 sdebug_q_cmd_complete(sd_dp); 4810 } 4811 4812 static bool got_shared_uuid; 4813 static uuid_t shared_uuid; 4814 4815 static int sdebug_device_create_zones(struct sdebug_dev_info *devip) 4816 { 4817 struct sdeb_zone_state *zsp; 4818 sector_t capacity = get_sdebug_capacity(); 4819 sector_t zstart = 0; 4820 unsigned int i; 4821 4822 /* 4823 * Set the zone size: if sdeb_zbc_zone_size_mb is not set, figure out 4824 * a zone size allowing for at least 4 zones on the device. Otherwise, 4825 * use the specified zone size checking that at least 2 zones can be 4826 * created for the device. 4827 */ 4828 if (!sdeb_zbc_zone_size_mb) { 4829 devip->zsize = (DEF_ZBC_ZONE_SIZE_MB * SZ_1M) 4830 >> ilog2(sdebug_sector_size); 4831 while (capacity < devip->zsize << 2 && devip->zsize >= 2) 4832 devip->zsize >>= 1; 4833 if (devip->zsize < 2) { 4834 pr_err("Device capacity too small\n"); 4835 return -EINVAL; 4836 } 4837 } else { 4838 if (!is_power_of_2(sdeb_zbc_zone_size_mb)) { 4839 pr_err("Zone size is not a power of 2\n"); 4840 return -EINVAL; 4841 } 4842 devip->zsize = (sdeb_zbc_zone_size_mb * SZ_1M) 4843 >> ilog2(sdebug_sector_size); 4844 if (devip->zsize >= capacity) { 4845 pr_err("Zone size too large for device capacity\n"); 4846 return -EINVAL; 4847 } 4848 } 4849 4850 devip->zsize_shift = ilog2(devip->zsize); 4851 devip->nr_zones = (capacity + devip->zsize - 1) >> devip->zsize_shift; 4852 4853 if (sdeb_zbc_nr_conv >= devip->nr_zones) { 4854 pr_err("Number of conventional zones too large\n"); 4855 return -EINVAL; 4856 } 4857 devip->nr_conv_zones = sdeb_zbc_nr_conv; 4858 4859 if (devip->zmodel == BLK_ZONED_HM) { 4860 /* zbc_max_open_zones can be 0, meaning "not reported" */ 4861 if (sdeb_zbc_max_open >= devip->nr_zones - 1) 4862 devip->max_open = (devip->nr_zones - 1) / 2; 4863 else 4864 devip->max_open = sdeb_zbc_max_open; 4865 } 4866 4867 devip->zstate = kcalloc(devip->nr_zones, 4868 sizeof(struct sdeb_zone_state), GFP_KERNEL); 4869 if (!devip->zstate) 4870 return -ENOMEM; 4871 4872 for (i = 0; i < devip->nr_zones; i++) { 4873 zsp = &devip->zstate[i]; 4874 4875 zsp->z_start = zstart; 4876 4877 if (i < devip->nr_conv_zones) { 4878 zsp->z_type = ZBC_ZONE_TYPE_CNV; 4879 zsp->z_cond = ZBC_NOT_WRITE_POINTER; 4880 zsp->z_wp = (sector_t)-1; 4881 } else { 4882 if (devip->zmodel == BLK_ZONED_HM) 4883 zsp->z_type = ZBC_ZONE_TYPE_SWR; 4884 else 4885 zsp->z_type = ZBC_ZONE_TYPE_SWP; 4886 zsp->z_cond = ZC1_EMPTY; 4887 zsp->z_wp = zsp->z_start; 4888 } 4889 4890 if (zsp->z_start + devip->zsize < capacity) 4891 zsp->z_size = devip->zsize; 4892 else 4893 zsp->z_size = capacity - zsp->z_start; 4894 4895 zstart += zsp->z_size; 4896 } 4897 4898 return 0; 4899 } 4900 4901 static struct sdebug_dev_info *sdebug_device_create( 4902 struct sdebug_host_info *sdbg_host, gfp_t flags) 4903 { 4904 struct sdebug_dev_info *devip; 4905 4906 devip = kzalloc(sizeof(*devip), flags); 4907 if (devip) { 4908 if (sdebug_uuid_ctl == 1) 4909 uuid_gen(&devip->lu_name); 4910 else if (sdebug_uuid_ctl == 2) { 4911 if (got_shared_uuid) 4912 devip->lu_name = shared_uuid; 4913 else { 4914 uuid_gen(&shared_uuid); 4915 got_shared_uuid = true; 4916 devip->lu_name = shared_uuid; 4917 } 4918 } 4919 devip->sdbg_host = sdbg_host; 4920 if (sdeb_zbc_in_use) { 4921 devip->zmodel = sdeb_zbc_model; 4922 if (sdebug_device_create_zones(devip)) { 4923 kfree(devip); 4924 return NULL; 4925 } 4926 } else { 4927 devip->zmodel = BLK_ZONED_NONE; 4928 } 4929 devip->sdbg_host = sdbg_host; 4930 devip->create_ts = ktime_get_boottime(); 4931 atomic_set(&devip->stopped, (sdeb_tur_ms_to_ready > 0 ? 2 : 0)); 4932 list_add_tail(&devip->dev_list, &sdbg_host->dev_info_list); 4933 } 4934 return devip; 4935 } 4936 4937 static struct sdebug_dev_info *find_build_dev_info(struct scsi_device *sdev) 4938 { 4939 struct sdebug_host_info *sdbg_host; 4940 struct sdebug_dev_info *open_devip = NULL; 4941 struct sdebug_dev_info *devip; 4942 4943 sdbg_host = *(struct sdebug_host_info **)shost_priv(sdev->host); 4944 if (!sdbg_host) { 4945 pr_err("Host info NULL\n"); 4946 return NULL; 4947 } 4948 4949 list_for_each_entry(devip, &sdbg_host->dev_info_list, dev_list) { 4950 if ((devip->used) && (devip->channel == sdev->channel) && 4951 (devip->target == sdev->id) && 4952 (devip->lun == sdev->lun)) 4953 return devip; 4954 else { 4955 if ((!devip->used) && (!open_devip)) 4956 open_devip = devip; 4957 } 4958 } 4959 if (!open_devip) { /* try and make a new one */ 4960 open_devip = sdebug_device_create(sdbg_host, GFP_ATOMIC); 4961 if (!open_devip) { 4962 pr_err("out of memory at line %d\n", __LINE__); 4963 return NULL; 4964 } 4965 } 4966 4967 open_devip->channel = sdev->channel; 4968 open_devip->target = sdev->id; 4969 open_devip->lun = sdev->lun; 4970 open_devip->sdbg_host = sdbg_host; 4971 atomic_set(&open_devip->num_in_q, 0); 4972 set_bit(SDEBUG_UA_POR, open_devip->uas_bm); 4973 open_devip->used = true; 4974 return open_devip; 4975 } 4976 4977 static int scsi_debug_slave_alloc(struct scsi_device *sdp) 4978 { 4979 if (sdebug_verbose) 4980 pr_info("slave_alloc <%u %u %u %llu>\n", 4981 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun); 4982 return 0; 4983 } 4984 4985 static int scsi_debug_slave_configure(struct scsi_device *sdp) 4986 { 4987 struct sdebug_dev_info *devip = 4988 (struct sdebug_dev_info *)sdp->hostdata; 4989 4990 if (sdebug_verbose) 4991 pr_info("slave_configure <%u %u %u %llu>\n", 4992 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun); 4993 if (sdp->host->max_cmd_len != SDEBUG_MAX_CMD_LEN) 4994 sdp->host->max_cmd_len = SDEBUG_MAX_CMD_LEN; 4995 if (devip == NULL) { 4996 devip = find_build_dev_info(sdp); 4997 if (devip == NULL) 4998 return 1; /* no resources, will be marked offline */ 4999 } 5000 sdp->hostdata = devip; 5001 if (sdebug_no_uld) 5002 sdp->no_uld_attach = 1; 5003 config_cdb_len(sdp); 5004 return 0; 5005 } 5006 5007 static void scsi_debug_slave_destroy(struct scsi_device *sdp) 5008 { 5009 struct sdebug_dev_info *devip = 5010 (struct sdebug_dev_info *)sdp->hostdata; 5011 5012 if (sdebug_verbose) 5013 pr_info("slave_destroy <%u %u %u %llu>\n", 5014 sdp->host->host_no, sdp->channel, sdp->id, sdp->lun); 5015 if (devip) { 5016 /* make this slot available for re-use */ 5017 devip->used = false; 5018 sdp->hostdata = NULL; 5019 } 5020 } 5021 5022 static void stop_qc_helper(struct sdebug_defer *sd_dp, 5023 enum sdeb_defer_type defer_t) 5024 { 5025 if (!sd_dp) 5026 return; 5027 if (defer_t == SDEB_DEFER_HRT) 5028 hrtimer_cancel(&sd_dp->hrt); 5029 else if (defer_t == SDEB_DEFER_WQ) 5030 cancel_work_sync(&sd_dp->ew.work); 5031 } 5032 5033 /* If @cmnd found deletes its timer or work queue and returns true; else 5034 returns false */ 5035 static bool stop_queued_cmnd(struct scsi_cmnd *cmnd) 5036 { 5037 unsigned long iflags; 5038 int j, k, qmax, r_qmax; 5039 enum sdeb_defer_type l_defer_t; 5040 struct sdebug_queue *sqp; 5041 struct sdebug_queued_cmd *sqcp; 5042 struct sdebug_dev_info *devip; 5043 struct sdebug_defer *sd_dp; 5044 5045 for (j = 0, sqp = sdebug_q_arr; j < submit_queues; ++j, ++sqp) { 5046 spin_lock_irqsave(&sqp->qc_lock, iflags); 5047 qmax = sdebug_max_queue; 5048 r_qmax = atomic_read(&retired_max_queue); 5049 if (r_qmax > qmax) 5050 qmax = r_qmax; 5051 for (k = 0; k < qmax; ++k) { 5052 if (test_bit(k, sqp->in_use_bm)) { 5053 sqcp = &sqp->qc_arr[k]; 5054 if (cmnd != sqcp->a_cmnd) 5055 continue; 5056 /* found */ 5057 devip = (struct sdebug_dev_info *) 5058 cmnd->device->hostdata; 5059 if (devip) 5060 atomic_dec(&devip->num_in_q); 5061 sqcp->a_cmnd = NULL; 5062 sd_dp = sqcp->sd_dp; 5063 if (sd_dp) { 5064 l_defer_t = sd_dp->defer_t; 5065 sd_dp->defer_t = SDEB_DEFER_NONE; 5066 } else 5067 l_defer_t = SDEB_DEFER_NONE; 5068 spin_unlock_irqrestore(&sqp->qc_lock, iflags); 5069 stop_qc_helper(sd_dp, l_defer_t); 5070 clear_bit(k, sqp->in_use_bm); 5071 return true; 5072 } 5073 } 5074 spin_unlock_irqrestore(&sqp->qc_lock, iflags); 5075 } 5076 return false; 5077 } 5078 5079 /* Deletes (stops) timers or work queues of all queued commands */ 5080 static void stop_all_queued(void) 5081 { 5082 unsigned long iflags; 5083 int j, k; 5084 enum sdeb_defer_type l_defer_t; 5085 struct sdebug_queue *sqp; 5086 struct sdebug_queued_cmd *sqcp; 5087 struct sdebug_dev_info *devip; 5088 struct sdebug_defer *sd_dp; 5089 5090 for (j = 0, sqp = sdebug_q_arr; j < submit_queues; ++j, ++sqp) { 5091 spin_lock_irqsave(&sqp->qc_lock, iflags); 5092 for (k = 0; k < SDEBUG_CANQUEUE; ++k) { 5093 if (test_bit(k, sqp->in_use_bm)) { 5094 sqcp = &sqp->qc_arr[k]; 5095 if (sqcp->a_cmnd == NULL) 5096 continue; 5097 devip = (struct sdebug_dev_info *) 5098 sqcp->a_cmnd->device->hostdata; 5099 if (devip) 5100 atomic_dec(&devip->num_in_q); 5101 sqcp->a_cmnd = NULL; 5102 sd_dp = sqcp->sd_dp; 5103 if (sd_dp) { 5104 l_defer_t = sd_dp->defer_t; 5105 sd_dp->defer_t = SDEB_DEFER_NONE; 5106 } else 5107 l_defer_t = SDEB_DEFER_NONE; 5108 spin_unlock_irqrestore(&sqp->qc_lock, iflags); 5109 stop_qc_helper(sd_dp, l_defer_t); 5110 clear_bit(k, sqp->in_use_bm); 5111 spin_lock_irqsave(&sqp->qc_lock, iflags); 5112 } 5113 } 5114 spin_unlock_irqrestore(&sqp->qc_lock, iflags); 5115 } 5116 } 5117 5118 /* Free queued command memory on heap */ 5119 static void free_all_queued(void) 5120 { 5121 int j, k; 5122 struct sdebug_queue *sqp; 5123 struct sdebug_queued_cmd *sqcp; 5124 5125 for (j = 0, sqp = sdebug_q_arr; j < submit_queues; ++j, ++sqp) { 5126 for (k = 0; k < SDEBUG_CANQUEUE; ++k) { 5127 sqcp = &sqp->qc_arr[k]; 5128 kfree(sqcp->sd_dp); 5129 sqcp->sd_dp = NULL; 5130 } 5131 } 5132 } 5133 5134 static int scsi_debug_abort(struct scsi_cmnd *SCpnt) 5135 { 5136 bool ok; 5137 5138 ++num_aborts; 5139 if (SCpnt) { 5140 ok = stop_queued_cmnd(SCpnt); 5141 if (SCpnt->device && (SDEBUG_OPT_ALL_NOISE & sdebug_opts)) 5142 sdev_printk(KERN_INFO, SCpnt->device, 5143 "%s: command%s found\n", __func__, 5144 ok ? "" : " not"); 5145 } 5146 return SUCCESS; 5147 } 5148 5149 static int scsi_debug_device_reset(struct scsi_cmnd *SCpnt) 5150 { 5151 ++num_dev_resets; 5152 if (SCpnt && SCpnt->device) { 5153 struct scsi_device *sdp = SCpnt->device; 5154 struct sdebug_dev_info *devip = 5155 (struct sdebug_dev_info *)sdp->hostdata; 5156 5157 if (SDEBUG_OPT_ALL_NOISE & sdebug_opts) 5158 sdev_printk(KERN_INFO, sdp, "%s\n", __func__); 5159 if (devip) 5160 set_bit(SDEBUG_UA_POR, devip->uas_bm); 5161 } 5162 return SUCCESS; 5163 } 5164 5165 static int scsi_debug_target_reset(struct scsi_cmnd *SCpnt) 5166 { 5167 struct sdebug_host_info *sdbg_host; 5168 struct sdebug_dev_info *devip; 5169 struct scsi_device *sdp; 5170 struct Scsi_Host *hp; 5171 int k = 0; 5172 5173 ++num_target_resets; 5174 if (!SCpnt) 5175 goto lie; 5176 sdp = SCpnt->device; 5177 if (!sdp) 5178 goto lie; 5179 if (SDEBUG_OPT_ALL_NOISE & sdebug_opts) 5180 sdev_printk(KERN_INFO, sdp, "%s\n", __func__); 5181 hp = sdp->host; 5182 if (!hp) 5183 goto lie; 5184 sdbg_host = *(struct sdebug_host_info **)shost_priv(hp); 5185 if (sdbg_host) { 5186 list_for_each_entry(devip, 5187 &sdbg_host->dev_info_list, 5188 dev_list) 5189 if (devip->target == sdp->id) { 5190 set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm); 5191 ++k; 5192 } 5193 } 5194 if (SDEBUG_OPT_RESET_NOISE & sdebug_opts) 5195 sdev_printk(KERN_INFO, sdp, 5196 "%s: %d device(s) found in target\n", __func__, k); 5197 lie: 5198 return SUCCESS; 5199 } 5200 5201 static int scsi_debug_bus_reset(struct scsi_cmnd *SCpnt) 5202 { 5203 struct sdebug_host_info *sdbg_host; 5204 struct sdebug_dev_info *devip; 5205 struct scsi_device *sdp; 5206 struct Scsi_Host *hp; 5207 int k = 0; 5208 5209 ++num_bus_resets; 5210 if (!(SCpnt && SCpnt->device)) 5211 goto lie; 5212 sdp = SCpnt->device; 5213 if (SDEBUG_OPT_ALL_NOISE & sdebug_opts) 5214 sdev_printk(KERN_INFO, sdp, "%s\n", __func__); 5215 hp = sdp->host; 5216 if (hp) { 5217 sdbg_host = *(struct sdebug_host_info **)shost_priv(hp); 5218 if (sdbg_host) { 5219 list_for_each_entry(devip, 5220 &sdbg_host->dev_info_list, 5221 dev_list) { 5222 set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm); 5223 ++k; 5224 } 5225 } 5226 } 5227 if (SDEBUG_OPT_RESET_NOISE & sdebug_opts) 5228 sdev_printk(KERN_INFO, sdp, 5229 "%s: %d device(s) found in host\n", __func__, k); 5230 lie: 5231 return SUCCESS; 5232 } 5233 5234 static int scsi_debug_host_reset(struct scsi_cmnd *SCpnt) 5235 { 5236 struct sdebug_host_info *sdbg_host; 5237 struct sdebug_dev_info *devip; 5238 int k = 0; 5239 5240 ++num_host_resets; 5241 if ((SCpnt->device) && (SDEBUG_OPT_ALL_NOISE & sdebug_opts)) 5242 sdev_printk(KERN_INFO, SCpnt->device, "%s\n", __func__); 5243 spin_lock(&sdebug_host_list_lock); 5244 list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) { 5245 list_for_each_entry(devip, &sdbg_host->dev_info_list, 5246 dev_list) { 5247 set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm); 5248 ++k; 5249 } 5250 } 5251 spin_unlock(&sdebug_host_list_lock); 5252 stop_all_queued(); 5253 if (SDEBUG_OPT_RESET_NOISE & sdebug_opts) 5254 sdev_printk(KERN_INFO, SCpnt->device, 5255 "%s: %d device(s) found\n", __func__, k); 5256 return SUCCESS; 5257 } 5258 5259 static void sdebug_build_parts(unsigned char *ramp, unsigned long store_size) 5260 { 5261 struct msdos_partition *pp; 5262 int starts[SDEBUG_MAX_PARTS + 2], max_part_secs; 5263 int sectors_per_part, num_sectors, k; 5264 int heads_by_sects, start_sec, end_sec; 5265 5266 /* assume partition table already zeroed */ 5267 if ((sdebug_num_parts < 1) || (store_size < 1048576)) 5268 return; 5269 if (sdebug_num_parts > SDEBUG_MAX_PARTS) { 5270 sdebug_num_parts = SDEBUG_MAX_PARTS; 5271 pr_warn("reducing partitions to %d\n", SDEBUG_MAX_PARTS); 5272 } 5273 num_sectors = (int)get_sdebug_capacity(); 5274 sectors_per_part = (num_sectors - sdebug_sectors_per) 5275 / sdebug_num_parts; 5276 heads_by_sects = sdebug_heads * sdebug_sectors_per; 5277 starts[0] = sdebug_sectors_per; 5278 max_part_secs = sectors_per_part; 5279 for (k = 1; k < sdebug_num_parts; ++k) { 5280 starts[k] = ((k * sectors_per_part) / heads_by_sects) 5281 * heads_by_sects; 5282 if (starts[k] - starts[k - 1] < max_part_secs) 5283 max_part_secs = starts[k] - starts[k - 1]; 5284 } 5285 starts[sdebug_num_parts] = num_sectors; 5286 starts[sdebug_num_parts + 1] = 0; 5287 5288 ramp[510] = 0x55; /* magic partition markings */ 5289 ramp[511] = 0xAA; 5290 pp = (struct msdos_partition *)(ramp + 0x1be); 5291 for (k = 0; starts[k + 1]; ++k, ++pp) { 5292 start_sec = starts[k]; 5293 end_sec = starts[k] + max_part_secs - 1; 5294 pp->boot_ind = 0; 5295 5296 pp->cyl = start_sec / heads_by_sects; 5297 pp->head = (start_sec - (pp->cyl * heads_by_sects)) 5298 / sdebug_sectors_per; 5299 pp->sector = (start_sec % sdebug_sectors_per) + 1; 5300 5301 pp->end_cyl = end_sec / heads_by_sects; 5302 pp->end_head = (end_sec - (pp->end_cyl * heads_by_sects)) 5303 / sdebug_sectors_per; 5304 pp->end_sector = (end_sec % sdebug_sectors_per) + 1; 5305 5306 pp->start_sect = cpu_to_le32(start_sec); 5307 pp->nr_sects = cpu_to_le32(end_sec - start_sec + 1); 5308 pp->sys_ind = 0x83; /* plain Linux partition */ 5309 } 5310 } 5311 5312 static void block_unblock_all_queues(bool block) 5313 { 5314 int j; 5315 struct sdebug_queue *sqp; 5316 5317 for (j = 0, sqp = sdebug_q_arr; j < submit_queues; ++j, ++sqp) 5318 atomic_set(&sqp->blocked, (int)block); 5319 } 5320 5321 /* Adjust (by rounding down) the sdebug_cmnd_count so abs(every_nth)-1 5322 * commands will be processed normally before triggers occur. 5323 */ 5324 static void tweak_cmnd_count(void) 5325 { 5326 int count, modulo; 5327 5328 modulo = abs(sdebug_every_nth); 5329 if (modulo < 2) 5330 return; 5331 block_unblock_all_queues(true); 5332 count = atomic_read(&sdebug_cmnd_count); 5333 atomic_set(&sdebug_cmnd_count, (count / modulo) * modulo); 5334 block_unblock_all_queues(false); 5335 } 5336 5337 static void clear_queue_stats(void) 5338 { 5339 atomic_set(&sdebug_cmnd_count, 0); 5340 atomic_set(&sdebug_completions, 0); 5341 atomic_set(&sdebug_miss_cpus, 0); 5342 atomic_set(&sdebug_a_tsf, 0); 5343 } 5344 5345 static bool inject_on_this_cmd(void) 5346 { 5347 if (sdebug_every_nth == 0) 5348 return false; 5349 return (atomic_read(&sdebug_cmnd_count) % abs(sdebug_every_nth)) == 0; 5350 } 5351 5352 #define INCLUSIVE_TIMING_MAX_NS 1000000 /* 1 millisecond */ 5353 5354 /* Complete the processing of the thread that queued a SCSI command to this 5355 * driver. It either completes the command by calling cmnd_done() or 5356 * schedules a hr timer or work queue then returns 0. Returns 5357 * SCSI_MLQUEUE_HOST_BUSY if temporarily out of resources. 5358 */ 5359 static int schedule_resp(struct scsi_cmnd *cmnd, struct sdebug_dev_info *devip, 5360 int scsi_result, 5361 int (*pfp)(struct scsi_cmnd *, 5362 struct sdebug_dev_info *), 5363 int delta_jiff, int ndelay) 5364 { 5365 bool new_sd_dp; 5366 bool inject = false; 5367 bool hipri = (cmnd->request->cmd_flags & REQ_HIPRI); 5368 int k, num_in_q, qdepth; 5369 unsigned long iflags; 5370 u64 ns_from_boot = 0; 5371 struct sdebug_queue *sqp; 5372 struct sdebug_queued_cmd *sqcp; 5373 struct scsi_device *sdp; 5374 struct sdebug_defer *sd_dp; 5375 5376 if (unlikely(devip == NULL)) { 5377 if (scsi_result == 0) 5378 scsi_result = DID_NO_CONNECT << 16; 5379 goto respond_in_thread; 5380 } 5381 sdp = cmnd->device; 5382 5383 if (delta_jiff == 0) 5384 goto respond_in_thread; 5385 5386 sqp = get_queue(cmnd); 5387 spin_lock_irqsave(&sqp->qc_lock, iflags); 5388 if (unlikely(atomic_read(&sqp->blocked))) { 5389 spin_unlock_irqrestore(&sqp->qc_lock, iflags); 5390 return SCSI_MLQUEUE_HOST_BUSY; 5391 } 5392 num_in_q = atomic_read(&devip->num_in_q); 5393 qdepth = cmnd->device->queue_depth; 5394 if (unlikely((qdepth > 0) && (num_in_q >= qdepth))) { 5395 if (scsi_result) { 5396 spin_unlock_irqrestore(&sqp->qc_lock, iflags); 5397 goto respond_in_thread; 5398 } else 5399 scsi_result = device_qfull_result; 5400 } else if (unlikely(sdebug_every_nth && 5401 (SDEBUG_OPT_RARE_TSF & sdebug_opts) && 5402 (scsi_result == 0))) { 5403 if ((num_in_q == (qdepth - 1)) && 5404 (atomic_inc_return(&sdebug_a_tsf) >= 5405 abs(sdebug_every_nth))) { 5406 atomic_set(&sdebug_a_tsf, 0); 5407 inject = true; 5408 scsi_result = device_qfull_result; 5409 } 5410 } 5411 5412 k = find_first_zero_bit(sqp->in_use_bm, sdebug_max_queue); 5413 if (unlikely(k >= sdebug_max_queue)) { 5414 spin_unlock_irqrestore(&sqp->qc_lock, iflags); 5415 if (scsi_result) 5416 goto respond_in_thread; 5417 else if (SDEBUG_OPT_ALL_TSF & sdebug_opts) 5418 scsi_result = device_qfull_result; 5419 if (SDEBUG_OPT_Q_NOISE & sdebug_opts) 5420 sdev_printk(KERN_INFO, sdp, 5421 "%s: max_queue=%d exceeded, %s\n", 5422 __func__, sdebug_max_queue, 5423 (scsi_result ? "status: TASK SET FULL" : 5424 "report: host busy")); 5425 if (scsi_result) 5426 goto respond_in_thread; 5427 else 5428 return SCSI_MLQUEUE_HOST_BUSY; 5429 } 5430 set_bit(k, sqp->in_use_bm); 5431 atomic_inc(&devip->num_in_q); 5432 sqcp = &sqp->qc_arr[k]; 5433 sqcp->a_cmnd = cmnd; 5434 cmnd->host_scribble = (unsigned char *)sqcp; 5435 sd_dp = sqcp->sd_dp; 5436 spin_unlock_irqrestore(&sqp->qc_lock, iflags); 5437 5438 if (!sd_dp) { 5439 sd_dp = kzalloc(sizeof(*sd_dp), GFP_ATOMIC); 5440 if (!sd_dp) { 5441 atomic_dec(&devip->num_in_q); 5442 clear_bit(k, sqp->in_use_bm); 5443 return SCSI_MLQUEUE_HOST_BUSY; 5444 } 5445 new_sd_dp = true; 5446 } else { 5447 new_sd_dp = false; 5448 } 5449 5450 /* Set the hostwide tag */ 5451 if (sdebug_host_max_queue) 5452 sd_dp->hc_idx = get_tag(cmnd); 5453 5454 if (hipri) 5455 ns_from_boot = ktime_get_boottime_ns(); 5456 5457 /* one of the resp_*() response functions is called here */ 5458 cmnd->result = pfp ? pfp(cmnd, devip) : 0; 5459 if (cmnd->result & SDEG_RES_IMMED_MASK) { 5460 cmnd->result &= ~SDEG_RES_IMMED_MASK; 5461 delta_jiff = ndelay = 0; 5462 } 5463 if (cmnd->result == 0 && scsi_result != 0) 5464 cmnd->result = scsi_result; 5465 if (cmnd->result == 0 && unlikely(sdebug_opts & SDEBUG_OPT_TRANSPORT_ERR)) { 5466 if (atomic_read(&sdeb_inject_pending)) { 5467 mk_sense_buffer(cmnd, ABORTED_COMMAND, TRANSPORT_PROBLEM, ACK_NAK_TO); 5468 atomic_set(&sdeb_inject_pending, 0); 5469 cmnd->result = check_condition_result; 5470 } 5471 } 5472 5473 if (unlikely(sdebug_verbose && cmnd->result)) 5474 sdev_printk(KERN_INFO, sdp, "%s: non-zero result=0x%x\n", 5475 __func__, cmnd->result); 5476 5477 if (delta_jiff > 0 || ndelay > 0) { 5478 ktime_t kt; 5479 5480 if (delta_jiff > 0) { 5481 u64 ns = jiffies_to_nsecs(delta_jiff); 5482 5483 if (sdebug_random && ns < U32_MAX) { 5484 ns = prandom_u32_max((u32)ns); 5485 } else if (sdebug_random) { 5486 ns >>= 12; /* scale to 4 usec precision */ 5487 if (ns < U32_MAX) /* over 4 hours max */ 5488 ns = prandom_u32_max((u32)ns); 5489 ns <<= 12; 5490 } 5491 kt = ns_to_ktime(ns); 5492 } else { /* ndelay has a 4.2 second max */ 5493 kt = sdebug_random ? prandom_u32_max((u32)ndelay) : 5494 (u32)ndelay; 5495 if (ndelay < INCLUSIVE_TIMING_MAX_NS) { 5496 u64 d = ktime_get_boottime_ns() - ns_from_boot; 5497 5498 if (kt <= d) { /* elapsed duration >= kt */ 5499 spin_lock_irqsave(&sqp->qc_lock, iflags); 5500 sqcp->a_cmnd = NULL; 5501 atomic_dec(&devip->num_in_q); 5502 clear_bit(k, sqp->in_use_bm); 5503 spin_unlock_irqrestore(&sqp->qc_lock, iflags); 5504 if (new_sd_dp) 5505 kfree(sd_dp); 5506 /* call scsi_done() from this thread */ 5507 cmnd->scsi_done(cmnd); 5508 return 0; 5509 } 5510 /* otherwise reduce kt by elapsed time */ 5511 kt -= d; 5512 } 5513 } 5514 if (hipri) { 5515 sd_dp->cmpl_ts = ktime_add(ns_to_ktime(ns_from_boot), kt); 5516 spin_lock_irqsave(&sqp->qc_lock, iflags); 5517 if (!sd_dp->init_poll) { 5518 sd_dp->init_poll = true; 5519 sqcp->sd_dp = sd_dp; 5520 sd_dp->sqa_idx = sqp - sdebug_q_arr; 5521 sd_dp->qc_idx = k; 5522 } 5523 sd_dp->defer_t = SDEB_DEFER_POLL; 5524 spin_unlock_irqrestore(&sqp->qc_lock, iflags); 5525 } else { 5526 if (!sd_dp->init_hrt) { 5527 sd_dp->init_hrt = true; 5528 sqcp->sd_dp = sd_dp; 5529 hrtimer_init(&sd_dp->hrt, CLOCK_MONOTONIC, 5530 HRTIMER_MODE_REL_PINNED); 5531 sd_dp->hrt.function = sdebug_q_cmd_hrt_complete; 5532 sd_dp->sqa_idx = sqp - sdebug_q_arr; 5533 sd_dp->qc_idx = k; 5534 } 5535 sd_dp->defer_t = SDEB_DEFER_HRT; 5536 /* schedule the invocation of scsi_done() for a later time */ 5537 hrtimer_start(&sd_dp->hrt, kt, HRTIMER_MODE_REL_PINNED); 5538 } 5539 if (sdebug_statistics) 5540 sd_dp->issuing_cpu = raw_smp_processor_id(); 5541 } else { /* jdelay < 0, use work queue */ 5542 if (unlikely((sdebug_opts & SDEBUG_OPT_CMD_ABORT) && 5543 atomic_read(&sdeb_inject_pending))) 5544 sd_dp->aborted = true; 5545 if (hipri) { 5546 sd_dp->cmpl_ts = ns_to_ktime(ns_from_boot); 5547 spin_lock_irqsave(&sqp->qc_lock, iflags); 5548 if (!sd_dp->init_poll) { 5549 sd_dp->init_poll = true; 5550 sqcp->sd_dp = sd_dp; 5551 sd_dp->sqa_idx = sqp - sdebug_q_arr; 5552 sd_dp->qc_idx = k; 5553 } 5554 sd_dp->defer_t = SDEB_DEFER_POLL; 5555 spin_unlock_irqrestore(&sqp->qc_lock, iflags); 5556 } else { 5557 if (!sd_dp->init_wq) { 5558 sd_dp->init_wq = true; 5559 sqcp->sd_dp = sd_dp; 5560 sd_dp->sqa_idx = sqp - sdebug_q_arr; 5561 sd_dp->qc_idx = k; 5562 INIT_WORK(&sd_dp->ew.work, sdebug_q_cmd_wq_complete); 5563 } 5564 sd_dp->defer_t = SDEB_DEFER_WQ; 5565 schedule_work(&sd_dp->ew.work); 5566 } 5567 if (sdebug_statistics) 5568 sd_dp->issuing_cpu = raw_smp_processor_id(); 5569 if (unlikely(sd_dp->aborted)) { 5570 sdev_printk(KERN_INFO, sdp, "abort request tag %d\n", cmnd->request->tag); 5571 blk_abort_request(cmnd->request); 5572 atomic_set(&sdeb_inject_pending, 0); 5573 sd_dp->aborted = false; 5574 } 5575 } 5576 if (unlikely((SDEBUG_OPT_Q_NOISE & sdebug_opts) && scsi_result == device_qfull_result)) 5577 sdev_printk(KERN_INFO, sdp, "%s: num_in_q=%d +1, %s%s\n", __func__, 5578 num_in_q, (inject ? "<inject> " : ""), "status: TASK SET FULL"); 5579 return 0; 5580 5581 respond_in_thread: /* call back to mid-layer using invocation thread */ 5582 cmnd->result = pfp != NULL ? pfp(cmnd, devip) : 0; 5583 cmnd->result &= ~SDEG_RES_IMMED_MASK; 5584 if (cmnd->result == 0 && scsi_result != 0) 5585 cmnd->result = scsi_result; 5586 cmnd->scsi_done(cmnd); 5587 return 0; 5588 } 5589 5590 /* Note: The following macros create attribute files in the 5591 /sys/module/scsi_debug/parameters directory. Unfortunately this 5592 driver is unaware of a change and cannot trigger auxiliary actions 5593 as it can when the corresponding attribute in the 5594 /sys/bus/pseudo/drivers/scsi_debug directory is changed. 5595 */ 5596 module_param_named(add_host, sdebug_add_host, int, S_IRUGO | S_IWUSR); 5597 module_param_named(ato, sdebug_ato, int, S_IRUGO); 5598 module_param_named(cdb_len, sdebug_cdb_len, int, 0644); 5599 module_param_named(clustering, sdebug_clustering, bool, S_IRUGO | S_IWUSR); 5600 module_param_named(delay, sdebug_jdelay, int, S_IRUGO | S_IWUSR); 5601 module_param_named(dev_size_mb, sdebug_dev_size_mb, int, S_IRUGO); 5602 module_param_named(dif, sdebug_dif, int, S_IRUGO); 5603 module_param_named(dix, sdebug_dix, int, S_IRUGO); 5604 module_param_named(dsense, sdebug_dsense, int, S_IRUGO | S_IWUSR); 5605 module_param_named(every_nth, sdebug_every_nth, int, S_IRUGO | S_IWUSR); 5606 module_param_named(fake_rw, sdebug_fake_rw, int, S_IRUGO | S_IWUSR); 5607 module_param_named(guard, sdebug_guard, uint, S_IRUGO); 5608 module_param_named(host_lock, sdebug_host_lock, bool, S_IRUGO | S_IWUSR); 5609 module_param_named(host_max_queue, sdebug_host_max_queue, int, S_IRUGO); 5610 module_param_string(inq_product, sdebug_inq_product_id, 5611 sizeof(sdebug_inq_product_id), S_IRUGO | S_IWUSR); 5612 module_param_string(inq_rev, sdebug_inq_product_rev, 5613 sizeof(sdebug_inq_product_rev), S_IRUGO | S_IWUSR); 5614 module_param_string(inq_vendor, sdebug_inq_vendor_id, 5615 sizeof(sdebug_inq_vendor_id), S_IRUGO | S_IWUSR); 5616 module_param_named(lbprz, sdebug_lbprz, int, S_IRUGO); 5617 module_param_named(lbpu, sdebug_lbpu, int, S_IRUGO); 5618 module_param_named(lbpws, sdebug_lbpws, int, S_IRUGO); 5619 module_param_named(lbpws10, sdebug_lbpws10, int, S_IRUGO); 5620 module_param_named(lowest_aligned, sdebug_lowest_aligned, int, S_IRUGO); 5621 module_param_named(lun_format, sdebug_lun_am_i, int, S_IRUGO | S_IWUSR); 5622 module_param_named(max_luns, sdebug_max_luns, int, S_IRUGO | S_IWUSR); 5623 module_param_named(max_queue, sdebug_max_queue, int, S_IRUGO | S_IWUSR); 5624 module_param_named(medium_error_count, sdebug_medium_error_count, int, 5625 S_IRUGO | S_IWUSR); 5626 module_param_named(medium_error_start, sdebug_medium_error_start, int, 5627 S_IRUGO | S_IWUSR); 5628 module_param_named(ndelay, sdebug_ndelay, int, S_IRUGO | S_IWUSR); 5629 module_param_named(no_lun_0, sdebug_no_lun_0, int, S_IRUGO | S_IWUSR); 5630 module_param_named(no_uld, sdebug_no_uld, int, S_IRUGO); 5631 module_param_named(num_parts, sdebug_num_parts, int, S_IRUGO); 5632 module_param_named(num_tgts, sdebug_num_tgts, int, S_IRUGO | S_IWUSR); 5633 module_param_named(opt_blks, sdebug_opt_blks, int, S_IRUGO); 5634 module_param_named(opt_xferlen_exp, sdebug_opt_xferlen_exp, int, S_IRUGO); 5635 module_param_named(opts, sdebug_opts, int, S_IRUGO | S_IWUSR); 5636 module_param_named(per_host_store, sdebug_per_host_store, bool, 5637 S_IRUGO | S_IWUSR); 5638 module_param_named(physblk_exp, sdebug_physblk_exp, int, S_IRUGO); 5639 module_param_named(ptype, sdebug_ptype, int, S_IRUGO | S_IWUSR); 5640 module_param_named(random, sdebug_random, bool, S_IRUGO | S_IWUSR); 5641 module_param_named(removable, sdebug_removable, bool, S_IRUGO | S_IWUSR); 5642 module_param_named(scsi_level, sdebug_scsi_level, int, S_IRUGO); 5643 module_param_named(sector_size, sdebug_sector_size, int, S_IRUGO); 5644 module_param_named(statistics, sdebug_statistics, bool, S_IRUGO | S_IWUSR); 5645 module_param_named(strict, sdebug_strict, bool, S_IRUGO | S_IWUSR); 5646 module_param_named(submit_queues, submit_queues, int, S_IRUGO); 5647 module_param_named(poll_queues, poll_queues, int, S_IRUGO); 5648 module_param_named(tur_ms_to_ready, sdeb_tur_ms_to_ready, int, S_IRUGO); 5649 module_param_named(unmap_alignment, sdebug_unmap_alignment, int, S_IRUGO); 5650 module_param_named(unmap_granularity, sdebug_unmap_granularity, int, S_IRUGO); 5651 module_param_named(unmap_max_blocks, sdebug_unmap_max_blocks, int, S_IRUGO); 5652 module_param_named(unmap_max_desc, sdebug_unmap_max_desc, int, S_IRUGO); 5653 module_param_named(uuid_ctl, sdebug_uuid_ctl, int, S_IRUGO); 5654 module_param_named(virtual_gb, sdebug_virtual_gb, int, S_IRUGO | S_IWUSR); 5655 module_param_named(vpd_use_hostno, sdebug_vpd_use_hostno, int, 5656 S_IRUGO | S_IWUSR); 5657 module_param_named(wp, sdebug_wp, bool, S_IRUGO | S_IWUSR); 5658 module_param_named(write_same_length, sdebug_write_same_length, int, 5659 S_IRUGO | S_IWUSR); 5660 module_param_named(zbc, sdeb_zbc_model_s, charp, S_IRUGO); 5661 module_param_named(zone_max_open, sdeb_zbc_max_open, int, S_IRUGO); 5662 module_param_named(zone_nr_conv, sdeb_zbc_nr_conv, int, S_IRUGO); 5663 module_param_named(zone_size_mb, sdeb_zbc_zone_size_mb, int, S_IRUGO); 5664 5665 MODULE_AUTHOR("Eric Youngdale + Douglas Gilbert"); 5666 MODULE_DESCRIPTION("SCSI debug adapter driver"); 5667 MODULE_LICENSE("GPL"); 5668 MODULE_VERSION(SDEBUG_VERSION); 5669 5670 MODULE_PARM_DESC(add_host, "add n hosts, in sysfs if negative remove host(s) (def=1)"); 5671 MODULE_PARM_DESC(ato, "application tag ownership: 0=disk 1=host (def=1)"); 5672 MODULE_PARM_DESC(cdb_len, "suggest CDB lengths to drivers (def=10)"); 5673 MODULE_PARM_DESC(clustering, "when set enables larger transfers (def=0)"); 5674 MODULE_PARM_DESC(delay, "response delay (def=1 jiffy); 0:imm, -1,-2:tiny"); 5675 MODULE_PARM_DESC(dev_size_mb, "size in MiB of ram shared by devs(def=8)"); 5676 MODULE_PARM_DESC(dif, "data integrity field type: 0-3 (def=0)"); 5677 MODULE_PARM_DESC(dix, "data integrity extensions mask (def=0)"); 5678 MODULE_PARM_DESC(dsense, "use descriptor sense format(def=0 -> fixed)"); 5679 MODULE_PARM_DESC(every_nth, "timeout every nth command(def=0)"); 5680 MODULE_PARM_DESC(fake_rw, "fake reads/writes instead of copying (def=0)"); 5681 MODULE_PARM_DESC(guard, "protection checksum: 0=crc, 1=ip (def=0)"); 5682 MODULE_PARM_DESC(host_lock, "host_lock is ignored (def=0)"); 5683 MODULE_PARM_DESC(host_max_queue, 5684 "host max # of queued cmds (0 to max(def) [max_queue fixed equal for !0])"); 5685 MODULE_PARM_DESC(inq_product, "SCSI INQUIRY product string (def=\"scsi_debug\")"); 5686 MODULE_PARM_DESC(inq_rev, "SCSI INQUIRY revision string (def=\"" 5687 SDEBUG_VERSION "\")"); 5688 MODULE_PARM_DESC(inq_vendor, "SCSI INQUIRY vendor string (def=\"Linux\")"); 5689 MODULE_PARM_DESC(lbprz, 5690 "on read unmapped LBs return 0 when 1 (def), return 0xff when 2"); 5691 MODULE_PARM_DESC(lbpu, "enable LBP, support UNMAP command (def=0)"); 5692 MODULE_PARM_DESC(lbpws, "enable LBP, support WRITE SAME(16) with UNMAP bit (def=0)"); 5693 MODULE_PARM_DESC(lbpws10, "enable LBP, support WRITE SAME(10) with UNMAP bit (def=0)"); 5694 MODULE_PARM_DESC(lowest_aligned, "lowest aligned lba (def=0)"); 5695 MODULE_PARM_DESC(lun_format, "LUN format: 0->peripheral (def); 1 --> flat address method"); 5696 MODULE_PARM_DESC(max_luns, "number of LUNs per target to simulate(def=1)"); 5697 MODULE_PARM_DESC(max_queue, "max number of queued commands (1 to max(def))"); 5698 MODULE_PARM_DESC(medium_error_count, "count of sectors to return follow on MEDIUM error"); 5699 MODULE_PARM_DESC(medium_error_start, "starting sector number to return MEDIUM error"); 5700 MODULE_PARM_DESC(ndelay, "response delay in nanoseconds (def=0 -> ignore)"); 5701 MODULE_PARM_DESC(no_lun_0, "no LU number 0 (def=0 -> have lun 0)"); 5702 MODULE_PARM_DESC(no_uld, "stop ULD (e.g. sd driver) attaching (def=0))"); 5703 MODULE_PARM_DESC(num_parts, "number of partitions(def=0)"); 5704 MODULE_PARM_DESC(num_tgts, "number of targets per host to simulate(def=1)"); 5705 MODULE_PARM_DESC(opt_blks, "optimal transfer length in blocks (def=1024)"); 5706 MODULE_PARM_DESC(opt_xferlen_exp, "optimal transfer length granularity exponent (def=physblk_exp)"); 5707 MODULE_PARM_DESC(opts, "1->noise, 2->medium_err, 4->timeout, 8->recovered_err... (def=0)"); 5708 MODULE_PARM_DESC(per_host_store, "If set, next positive add_host will get new store (def=0)"); 5709 MODULE_PARM_DESC(physblk_exp, "physical block exponent (def=0)"); 5710 MODULE_PARM_DESC(poll_queues, "support for iouring iopoll queues (1 to max(submit_queues - 1))"); 5711 MODULE_PARM_DESC(ptype, "SCSI peripheral type(def=0[disk])"); 5712 MODULE_PARM_DESC(random, "If set, uniformly randomize command duration between 0 and delay_in_ns"); 5713 MODULE_PARM_DESC(removable, "claim to have removable media (def=0)"); 5714 MODULE_PARM_DESC(scsi_level, "SCSI level to simulate(def=7[SPC-5])"); 5715 MODULE_PARM_DESC(sector_size, "logical block size in bytes (def=512)"); 5716 MODULE_PARM_DESC(statistics, "collect statistics on commands, queues (def=0)"); 5717 MODULE_PARM_DESC(strict, "stricter checks: reserved field in cdb (def=0)"); 5718 MODULE_PARM_DESC(submit_queues, "support for block multi-queue (def=1)"); 5719 MODULE_PARM_DESC(tur_ms_to_ready, "TEST UNIT READY millisecs before initial good status (def=0)"); 5720 MODULE_PARM_DESC(unmap_alignment, "lowest aligned thin provisioning lba (def=0)"); 5721 MODULE_PARM_DESC(unmap_granularity, "thin provisioning granularity in blocks (def=1)"); 5722 MODULE_PARM_DESC(unmap_max_blocks, "max # of blocks can be unmapped in one cmd (def=0xffffffff)"); 5723 MODULE_PARM_DESC(unmap_max_desc, "max # of ranges that can be unmapped in one cmd (def=256)"); 5724 MODULE_PARM_DESC(uuid_ctl, 5725 "1->use uuid for lu name, 0->don't, 2->all use same (def=0)"); 5726 MODULE_PARM_DESC(virtual_gb, "virtual gigabyte (GiB) size (def=0 -> use dev_size_mb)"); 5727 MODULE_PARM_DESC(vpd_use_hostno, "0 -> dev ids ignore hostno (def=1 -> unique dev ids)"); 5728 MODULE_PARM_DESC(wp, "Write Protect (def=0)"); 5729 MODULE_PARM_DESC(write_same_length, "Maximum blocks per WRITE SAME cmd (def=0xffff)"); 5730 MODULE_PARM_DESC(zbc, "'none' [0]; 'aware' [1]; 'managed' [2] (def=0). Can have 'host-' prefix"); 5731 MODULE_PARM_DESC(zone_max_open, "Maximum number of open zones; [0] for no limit (def=auto)"); 5732 MODULE_PARM_DESC(zone_nr_conv, "Number of conventional zones (def=1)"); 5733 MODULE_PARM_DESC(zone_size_mb, "Zone size in MiB (def=auto)"); 5734 5735 #define SDEBUG_INFO_LEN 256 5736 static char sdebug_info[SDEBUG_INFO_LEN]; 5737 5738 static const char *scsi_debug_info(struct Scsi_Host *shp) 5739 { 5740 int k; 5741 5742 k = scnprintf(sdebug_info, SDEBUG_INFO_LEN, "%s: version %s [%s]\n", 5743 my_name, SDEBUG_VERSION, sdebug_version_date); 5744 if (k >= (SDEBUG_INFO_LEN - 1)) 5745 return sdebug_info; 5746 scnprintf(sdebug_info + k, SDEBUG_INFO_LEN - k, 5747 " dev_size_mb=%d, opts=0x%x, submit_queues=%d, %s=%d", 5748 sdebug_dev_size_mb, sdebug_opts, submit_queues, 5749 "statistics", (int)sdebug_statistics); 5750 return sdebug_info; 5751 } 5752 5753 /* 'echo <val> > /proc/scsi/scsi_debug/<host_id>' writes to opts */ 5754 static int scsi_debug_write_info(struct Scsi_Host *host, char *buffer, 5755 int length) 5756 { 5757 char arr[16]; 5758 int opts; 5759 int minLen = length > 15 ? 15 : length; 5760 5761 if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) 5762 return -EACCES; 5763 memcpy(arr, buffer, minLen); 5764 arr[minLen] = '\0'; 5765 if (1 != sscanf(arr, "%d", &opts)) 5766 return -EINVAL; 5767 sdebug_opts = opts; 5768 sdebug_verbose = !!(SDEBUG_OPT_NOISE & opts); 5769 sdebug_any_injecting_opt = !!(SDEBUG_OPT_ALL_INJECTING & opts); 5770 if (sdebug_every_nth != 0) 5771 tweak_cmnd_count(); 5772 return length; 5773 } 5774 5775 /* Output seen with 'cat /proc/scsi/scsi_debug/<host_id>'. It will be the 5776 * same for each scsi_debug host (if more than one). Some of the counters 5777 * output are not atomics so might be inaccurate in a busy system. */ 5778 static int scsi_debug_show_info(struct seq_file *m, struct Scsi_Host *host) 5779 { 5780 int f, j, l; 5781 struct sdebug_queue *sqp; 5782 struct sdebug_host_info *sdhp; 5783 5784 seq_printf(m, "scsi_debug adapter driver, version %s [%s]\n", 5785 SDEBUG_VERSION, sdebug_version_date); 5786 seq_printf(m, "num_tgts=%d, %ssize=%d MB, opts=0x%x, every_nth=%d\n", 5787 sdebug_num_tgts, "shared (ram) ", sdebug_dev_size_mb, 5788 sdebug_opts, sdebug_every_nth); 5789 seq_printf(m, "delay=%d, ndelay=%d, max_luns=%d, sector_size=%d %s\n", 5790 sdebug_jdelay, sdebug_ndelay, sdebug_max_luns, 5791 sdebug_sector_size, "bytes"); 5792 seq_printf(m, "cylinders=%d, heads=%d, sectors=%d, command aborts=%d\n", 5793 sdebug_cylinders_per, sdebug_heads, sdebug_sectors_per, 5794 num_aborts); 5795 seq_printf(m, "RESETs: device=%d, target=%d, bus=%d, host=%d\n", 5796 num_dev_resets, num_target_resets, num_bus_resets, 5797 num_host_resets); 5798 seq_printf(m, "dix_reads=%d, dix_writes=%d, dif_errors=%d\n", 5799 dix_reads, dix_writes, dif_errors); 5800 seq_printf(m, "usec_in_jiffy=%lu, statistics=%d\n", TICK_NSEC / 1000, 5801 sdebug_statistics); 5802 seq_printf(m, "cmnd_count=%d, completions=%d, %s=%d, a_tsf=%d, mq_polls=%d\n", 5803 atomic_read(&sdebug_cmnd_count), 5804 atomic_read(&sdebug_completions), 5805 "miss_cpus", atomic_read(&sdebug_miss_cpus), 5806 atomic_read(&sdebug_a_tsf), 5807 atomic_read(&sdeb_mq_poll_count)); 5808 5809 seq_printf(m, "submit_queues=%d\n", submit_queues); 5810 for (j = 0, sqp = sdebug_q_arr; j < submit_queues; ++j, ++sqp) { 5811 seq_printf(m, " queue %d:\n", j); 5812 f = find_first_bit(sqp->in_use_bm, sdebug_max_queue); 5813 if (f != sdebug_max_queue) { 5814 l = find_last_bit(sqp->in_use_bm, sdebug_max_queue); 5815 seq_printf(m, " in_use_bm BUSY: %s: %d,%d\n", 5816 "first,last bits", f, l); 5817 } 5818 } 5819 5820 seq_printf(m, "this host_no=%d\n", host->host_no); 5821 if (!xa_empty(per_store_ap)) { 5822 bool niu; 5823 int idx; 5824 unsigned long l_idx; 5825 struct sdeb_store_info *sip; 5826 5827 seq_puts(m, "\nhost list:\n"); 5828 j = 0; 5829 list_for_each_entry(sdhp, &sdebug_host_list, host_list) { 5830 idx = sdhp->si_idx; 5831 seq_printf(m, " %d: host_no=%d, si_idx=%d\n", j, 5832 sdhp->shost->host_no, idx); 5833 ++j; 5834 } 5835 seq_printf(m, "\nper_store array [most_recent_idx=%d]:\n", 5836 sdeb_most_recent_idx); 5837 j = 0; 5838 xa_for_each(per_store_ap, l_idx, sip) { 5839 niu = xa_get_mark(per_store_ap, l_idx, 5840 SDEB_XA_NOT_IN_USE); 5841 idx = (int)l_idx; 5842 seq_printf(m, " %d: idx=%d%s\n", j, idx, 5843 (niu ? " not_in_use" : "")); 5844 ++j; 5845 } 5846 } 5847 return 0; 5848 } 5849 5850 static ssize_t delay_show(struct device_driver *ddp, char *buf) 5851 { 5852 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_jdelay); 5853 } 5854 /* Returns -EBUSY if jdelay is being changed and commands are queued. The unit 5855 * of delay is jiffies. 5856 */ 5857 static ssize_t delay_store(struct device_driver *ddp, const char *buf, 5858 size_t count) 5859 { 5860 int jdelay, res; 5861 5862 if (count > 0 && sscanf(buf, "%d", &jdelay) == 1) { 5863 res = count; 5864 if (sdebug_jdelay != jdelay) { 5865 int j, k; 5866 struct sdebug_queue *sqp; 5867 5868 block_unblock_all_queues(true); 5869 for (j = 0, sqp = sdebug_q_arr; j < submit_queues; 5870 ++j, ++sqp) { 5871 k = find_first_bit(sqp->in_use_bm, 5872 sdebug_max_queue); 5873 if (k != sdebug_max_queue) { 5874 res = -EBUSY; /* queued commands */ 5875 break; 5876 } 5877 } 5878 if (res > 0) { 5879 sdebug_jdelay = jdelay; 5880 sdebug_ndelay = 0; 5881 } 5882 block_unblock_all_queues(false); 5883 } 5884 return res; 5885 } 5886 return -EINVAL; 5887 } 5888 static DRIVER_ATTR_RW(delay); 5889 5890 static ssize_t ndelay_show(struct device_driver *ddp, char *buf) 5891 { 5892 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_ndelay); 5893 } 5894 /* Returns -EBUSY if ndelay is being changed and commands are queued */ 5895 /* If > 0 and accepted then sdebug_jdelay is set to JDELAY_OVERRIDDEN */ 5896 static ssize_t ndelay_store(struct device_driver *ddp, const char *buf, 5897 size_t count) 5898 { 5899 int ndelay, res; 5900 5901 if ((count > 0) && (1 == sscanf(buf, "%d", &ndelay)) && 5902 (ndelay >= 0) && (ndelay < (1000 * 1000 * 1000))) { 5903 res = count; 5904 if (sdebug_ndelay != ndelay) { 5905 int j, k; 5906 struct sdebug_queue *sqp; 5907 5908 block_unblock_all_queues(true); 5909 for (j = 0, sqp = sdebug_q_arr; j < submit_queues; 5910 ++j, ++sqp) { 5911 k = find_first_bit(sqp->in_use_bm, 5912 sdebug_max_queue); 5913 if (k != sdebug_max_queue) { 5914 res = -EBUSY; /* queued commands */ 5915 break; 5916 } 5917 } 5918 if (res > 0) { 5919 sdebug_ndelay = ndelay; 5920 sdebug_jdelay = ndelay ? JDELAY_OVERRIDDEN 5921 : DEF_JDELAY; 5922 } 5923 block_unblock_all_queues(false); 5924 } 5925 return res; 5926 } 5927 return -EINVAL; 5928 } 5929 static DRIVER_ATTR_RW(ndelay); 5930 5931 static ssize_t opts_show(struct device_driver *ddp, char *buf) 5932 { 5933 return scnprintf(buf, PAGE_SIZE, "0x%x\n", sdebug_opts); 5934 } 5935 5936 static ssize_t opts_store(struct device_driver *ddp, const char *buf, 5937 size_t count) 5938 { 5939 int opts; 5940 char work[20]; 5941 5942 if (sscanf(buf, "%10s", work) == 1) { 5943 if (strncasecmp(work, "0x", 2) == 0) { 5944 if (kstrtoint(work + 2, 16, &opts) == 0) 5945 goto opts_done; 5946 } else { 5947 if (kstrtoint(work, 10, &opts) == 0) 5948 goto opts_done; 5949 } 5950 } 5951 return -EINVAL; 5952 opts_done: 5953 sdebug_opts = opts; 5954 sdebug_verbose = !!(SDEBUG_OPT_NOISE & opts); 5955 sdebug_any_injecting_opt = !!(SDEBUG_OPT_ALL_INJECTING & opts); 5956 tweak_cmnd_count(); 5957 return count; 5958 } 5959 static DRIVER_ATTR_RW(opts); 5960 5961 static ssize_t ptype_show(struct device_driver *ddp, char *buf) 5962 { 5963 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_ptype); 5964 } 5965 static ssize_t ptype_store(struct device_driver *ddp, const char *buf, 5966 size_t count) 5967 { 5968 int n; 5969 5970 /* Cannot change from or to TYPE_ZBC with sysfs */ 5971 if (sdebug_ptype == TYPE_ZBC) 5972 return -EINVAL; 5973 5974 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) { 5975 if (n == TYPE_ZBC) 5976 return -EINVAL; 5977 sdebug_ptype = n; 5978 return count; 5979 } 5980 return -EINVAL; 5981 } 5982 static DRIVER_ATTR_RW(ptype); 5983 5984 static ssize_t dsense_show(struct device_driver *ddp, char *buf) 5985 { 5986 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_dsense); 5987 } 5988 static ssize_t dsense_store(struct device_driver *ddp, const char *buf, 5989 size_t count) 5990 { 5991 int n; 5992 5993 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) { 5994 sdebug_dsense = n; 5995 return count; 5996 } 5997 return -EINVAL; 5998 } 5999 static DRIVER_ATTR_RW(dsense); 6000 6001 static ssize_t fake_rw_show(struct device_driver *ddp, char *buf) 6002 { 6003 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_fake_rw); 6004 } 6005 static ssize_t fake_rw_store(struct device_driver *ddp, const char *buf, 6006 size_t count) 6007 { 6008 int n, idx; 6009 6010 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) { 6011 bool want_store = (n == 0); 6012 struct sdebug_host_info *sdhp; 6013 6014 n = (n > 0); 6015 sdebug_fake_rw = (sdebug_fake_rw > 0); 6016 if (sdebug_fake_rw == n) 6017 return count; /* not transitioning so do nothing */ 6018 6019 if (want_store) { /* 1 --> 0 transition, set up store */ 6020 if (sdeb_first_idx < 0) { 6021 idx = sdebug_add_store(); 6022 if (idx < 0) 6023 return idx; 6024 } else { 6025 idx = sdeb_first_idx; 6026 xa_clear_mark(per_store_ap, idx, 6027 SDEB_XA_NOT_IN_USE); 6028 } 6029 /* make all hosts use same store */ 6030 list_for_each_entry(sdhp, &sdebug_host_list, 6031 host_list) { 6032 if (sdhp->si_idx != idx) { 6033 xa_set_mark(per_store_ap, sdhp->si_idx, 6034 SDEB_XA_NOT_IN_USE); 6035 sdhp->si_idx = idx; 6036 } 6037 } 6038 sdeb_most_recent_idx = idx; 6039 } else { /* 0 --> 1 transition is trigger for shrink */ 6040 sdebug_erase_all_stores(true /* apart from first */); 6041 } 6042 sdebug_fake_rw = n; 6043 return count; 6044 } 6045 return -EINVAL; 6046 } 6047 static DRIVER_ATTR_RW(fake_rw); 6048 6049 static ssize_t no_lun_0_show(struct device_driver *ddp, char *buf) 6050 { 6051 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_no_lun_0); 6052 } 6053 static ssize_t no_lun_0_store(struct device_driver *ddp, const char *buf, 6054 size_t count) 6055 { 6056 int n; 6057 6058 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) { 6059 sdebug_no_lun_0 = n; 6060 return count; 6061 } 6062 return -EINVAL; 6063 } 6064 static DRIVER_ATTR_RW(no_lun_0); 6065 6066 static ssize_t num_tgts_show(struct device_driver *ddp, char *buf) 6067 { 6068 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_num_tgts); 6069 } 6070 static ssize_t num_tgts_store(struct device_driver *ddp, const char *buf, 6071 size_t count) 6072 { 6073 int n; 6074 6075 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) { 6076 sdebug_num_tgts = n; 6077 sdebug_max_tgts_luns(); 6078 return count; 6079 } 6080 return -EINVAL; 6081 } 6082 static DRIVER_ATTR_RW(num_tgts); 6083 6084 static ssize_t dev_size_mb_show(struct device_driver *ddp, char *buf) 6085 { 6086 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_dev_size_mb); 6087 } 6088 static DRIVER_ATTR_RO(dev_size_mb); 6089 6090 static ssize_t per_host_store_show(struct device_driver *ddp, char *buf) 6091 { 6092 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_per_host_store); 6093 } 6094 6095 static ssize_t per_host_store_store(struct device_driver *ddp, const char *buf, 6096 size_t count) 6097 { 6098 bool v; 6099 6100 if (kstrtobool(buf, &v)) 6101 return -EINVAL; 6102 6103 sdebug_per_host_store = v; 6104 return count; 6105 } 6106 static DRIVER_ATTR_RW(per_host_store); 6107 6108 static ssize_t num_parts_show(struct device_driver *ddp, char *buf) 6109 { 6110 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_num_parts); 6111 } 6112 static DRIVER_ATTR_RO(num_parts); 6113 6114 static ssize_t every_nth_show(struct device_driver *ddp, char *buf) 6115 { 6116 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_every_nth); 6117 } 6118 static ssize_t every_nth_store(struct device_driver *ddp, const char *buf, 6119 size_t count) 6120 { 6121 int nth; 6122 char work[20]; 6123 6124 if (sscanf(buf, "%10s", work) == 1) { 6125 if (strncasecmp(work, "0x", 2) == 0) { 6126 if (kstrtoint(work + 2, 16, &nth) == 0) 6127 goto every_nth_done; 6128 } else { 6129 if (kstrtoint(work, 10, &nth) == 0) 6130 goto every_nth_done; 6131 } 6132 } 6133 return -EINVAL; 6134 6135 every_nth_done: 6136 sdebug_every_nth = nth; 6137 if (nth && !sdebug_statistics) { 6138 pr_info("every_nth needs statistics=1, set it\n"); 6139 sdebug_statistics = true; 6140 } 6141 tweak_cmnd_count(); 6142 return count; 6143 } 6144 static DRIVER_ATTR_RW(every_nth); 6145 6146 static ssize_t lun_format_show(struct device_driver *ddp, char *buf) 6147 { 6148 return scnprintf(buf, PAGE_SIZE, "%d\n", (int)sdebug_lun_am); 6149 } 6150 static ssize_t lun_format_store(struct device_driver *ddp, const char *buf, 6151 size_t count) 6152 { 6153 int n; 6154 bool changed; 6155 6156 if (kstrtoint(buf, 0, &n)) 6157 return -EINVAL; 6158 if (n >= 0) { 6159 if (n > (int)SAM_LUN_AM_FLAT) { 6160 pr_warn("only LUN address methods 0 and 1 are supported\n"); 6161 return -EINVAL; 6162 } 6163 changed = ((int)sdebug_lun_am != n); 6164 sdebug_lun_am = n; 6165 if (changed && sdebug_scsi_level >= 5) { /* >= SPC-3 */ 6166 struct sdebug_host_info *sdhp; 6167 struct sdebug_dev_info *dp; 6168 6169 spin_lock(&sdebug_host_list_lock); 6170 list_for_each_entry(sdhp, &sdebug_host_list, host_list) { 6171 list_for_each_entry(dp, &sdhp->dev_info_list, dev_list) { 6172 set_bit(SDEBUG_UA_LUNS_CHANGED, dp->uas_bm); 6173 } 6174 } 6175 spin_unlock(&sdebug_host_list_lock); 6176 } 6177 return count; 6178 } 6179 return -EINVAL; 6180 } 6181 static DRIVER_ATTR_RW(lun_format); 6182 6183 static ssize_t max_luns_show(struct device_driver *ddp, char *buf) 6184 { 6185 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_max_luns); 6186 } 6187 static ssize_t max_luns_store(struct device_driver *ddp, const char *buf, 6188 size_t count) 6189 { 6190 int n; 6191 bool changed; 6192 6193 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) { 6194 if (n > 256) { 6195 pr_warn("max_luns can be no more than 256\n"); 6196 return -EINVAL; 6197 } 6198 changed = (sdebug_max_luns != n); 6199 sdebug_max_luns = n; 6200 sdebug_max_tgts_luns(); 6201 if (changed && (sdebug_scsi_level >= 5)) { /* >= SPC-3 */ 6202 struct sdebug_host_info *sdhp; 6203 struct sdebug_dev_info *dp; 6204 6205 spin_lock(&sdebug_host_list_lock); 6206 list_for_each_entry(sdhp, &sdebug_host_list, 6207 host_list) { 6208 list_for_each_entry(dp, &sdhp->dev_info_list, 6209 dev_list) { 6210 set_bit(SDEBUG_UA_LUNS_CHANGED, 6211 dp->uas_bm); 6212 } 6213 } 6214 spin_unlock(&sdebug_host_list_lock); 6215 } 6216 return count; 6217 } 6218 return -EINVAL; 6219 } 6220 static DRIVER_ATTR_RW(max_luns); 6221 6222 static ssize_t max_queue_show(struct device_driver *ddp, char *buf) 6223 { 6224 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_max_queue); 6225 } 6226 /* N.B. max_queue can be changed while there are queued commands. In flight 6227 * commands beyond the new max_queue will be completed. */ 6228 static ssize_t max_queue_store(struct device_driver *ddp, const char *buf, 6229 size_t count) 6230 { 6231 int j, n, k, a; 6232 struct sdebug_queue *sqp; 6233 6234 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n > 0) && 6235 (n <= SDEBUG_CANQUEUE) && 6236 (sdebug_host_max_queue == 0)) { 6237 block_unblock_all_queues(true); 6238 k = 0; 6239 for (j = 0, sqp = sdebug_q_arr; j < submit_queues; 6240 ++j, ++sqp) { 6241 a = find_last_bit(sqp->in_use_bm, SDEBUG_CANQUEUE); 6242 if (a > k) 6243 k = a; 6244 } 6245 sdebug_max_queue = n; 6246 if (k == SDEBUG_CANQUEUE) 6247 atomic_set(&retired_max_queue, 0); 6248 else if (k >= n) 6249 atomic_set(&retired_max_queue, k + 1); 6250 else 6251 atomic_set(&retired_max_queue, 0); 6252 block_unblock_all_queues(false); 6253 return count; 6254 } 6255 return -EINVAL; 6256 } 6257 static DRIVER_ATTR_RW(max_queue); 6258 6259 static ssize_t host_max_queue_show(struct device_driver *ddp, char *buf) 6260 { 6261 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_host_max_queue); 6262 } 6263 6264 /* 6265 * Since this is used for .can_queue, and we get the hc_idx tag from the bitmap 6266 * in range [0, sdebug_host_max_queue), we can't change it. 6267 */ 6268 static DRIVER_ATTR_RO(host_max_queue); 6269 6270 static ssize_t no_uld_show(struct device_driver *ddp, char *buf) 6271 { 6272 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_no_uld); 6273 } 6274 static DRIVER_ATTR_RO(no_uld); 6275 6276 static ssize_t scsi_level_show(struct device_driver *ddp, char *buf) 6277 { 6278 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_scsi_level); 6279 } 6280 static DRIVER_ATTR_RO(scsi_level); 6281 6282 static ssize_t virtual_gb_show(struct device_driver *ddp, char *buf) 6283 { 6284 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_virtual_gb); 6285 } 6286 static ssize_t virtual_gb_store(struct device_driver *ddp, const char *buf, 6287 size_t count) 6288 { 6289 int n; 6290 bool changed; 6291 6292 /* Ignore capacity change for ZBC drives for now */ 6293 if (sdeb_zbc_in_use) 6294 return -ENOTSUPP; 6295 6296 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) { 6297 changed = (sdebug_virtual_gb != n); 6298 sdebug_virtual_gb = n; 6299 sdebug_capacity = get_sdebug_capacity(); 6300 if (changed) { 6301 struct sdebug_host_info *sdhp; 6302 struct sdebug_dev_info *dp; 6303 6304 spin_lock(&sdebug_host_list_lock); 6305 list_for_each_entry(sdhp, &sdebug_host_list, 6306 host_list) { 6307 list_for_each_entry(dp, &sdhp->dev_info_list, 6308 dev_list) { 6309 set_bit(SDEBUG_UA_CAPACITY_CHANGED, 6310 dp->uas_bm); 6311 } 6312 } 6313 spin_unlock(&sdebug_host_list_lock); 6314 } 6315 return count; 6316 } 6317 return -EINVAL; 6318 } 6319 static DRIVER_ATTR_RW(virtual_gb); 6320 6321 static ssize_t add_host_show(struct device_driver *ddp, char *buf) 6322 { 6323 /* absolute number of hosts currently active is what is shown */ 6324 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_num_hosts); 6325 } 6326 6327 static ssize_t add_host_store(struct device_driver *ddp, const char *buf, 6328 size_t count) 6329 { 6330 bool found; 6331 unsigned long idx; 6332 struct sdeb_store_info *sip; 6333 bool want_phs = (sdebug_fake_rw == 0) && sdebug_per_host_store; 6334 int delta_hosts; 6335 6336 if (sscanf(buf, "%d", &delta_hosts) != 1) 6337 return -EINVAL; 6338 if (delta_hosts > 0) { 6339 do { 6340 found = false; 6341 if (want_phs) { 6342 xa_for_each_marked(per_store_ap, idx, sip, 6343 SDEB_XA_NOT_IN_USE) { 6344 sdeb_most_recent_idx = (int)idx; 6345 found = true; 6346 break; 6347 } 6348 if (found) /* re-use case */ 6349 sdebug_add_host_helper((int)idx); 6350 else 6351 sdebug_do_add_host(true); 6352 } else { 6353 sdebug_do_add_host(false); 6354 } 6355 } while (--delta_hosts); 6356 } else if (delta_hosts < 0) { 6357 do { 6358 sdebug_do_remove_host(false); 6359 } while (++delta_hosts); 6360 } 6361 return count; 6362 } 6363 static DRIVER_ATTR_RW(add_host); 6364 6365 static ssize_t vpd_use_hostno_show(struct device_driver *ddp, char *buf) 6366 { 6367 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_vpd_use_hostno); 6368 } 6369 static ssize_t vpd_use_hostno_store(struct device_driver *ddp, const char *buf, 6370 size_t count) 6371 { 6372 int n; 6373 6374 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) { 6375 sdebug_vpd_use_hostno = n; 6376 return count; 6377 } 6378 return -EINVAL; 6379 } 6380 static DRIVER_ATTR_RW(vpd_use_hostno); 6381 6382 static ssize_t statistics_show(struct device_driver *ddp, char *buf) 6383 { 6384 return scnprintf(buf, PAGE_SIZE, "%d\n", (int)sdebug_statistics); 6385 } 6386 static ssize_t statistics_store(struct device_driver *ddp, const char *buf, 6387 size_t count) 6388 { 6389 int n; 6390 6391 if ((count > 0) && (sscanf(buf, "%d", &n) == 1) && (n >= 0)) { 6392 if (n > 0) 6393 sdebug_statistics = true; 6394 else { 6395 clear_queue_stats(); 6396 sdebug_statistics = false; 6397 } 6398 return count; 6399 } 6400 return -EINVAL; 6401 } 6402 static DRIVER_ATTR_RW(statistics); 6403 6404 static ssize_t sector_size_show(struct device_driver *ddp, char *buf) 6405 { 6406 return scnprintf(buf, PAGE_SIZE, "%u\n", sdebug_sector_size); 6407 } 6408 static DRIVER_ATTR_RO(sector_size); 6409 6410 static ssize_t submit_queues_show(struct device_driver *ddp, char *buf) 6411 { 6412 return scnprintf(buf, PAGE_SIZE, "%d\n", submit_queues); 6413 } 6414 static DRIVER_ATTR_RO(submit_queues); 6415 6416 static ssize_t dix_show(struct device_driver *ddp, char *buf) 6417 { 6418 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_dix); 6419 } 6420 static DRIVER_ATTR_RO(dix); 6421 6422 static ssize_t dif_show(struct device_driver *ddp, char *buf) 6423 { 6424 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_dif); 6425 } 6426 static DRIVER_ATTR_RO(dif); 6427 6428 static ssize_t guard_show(struct device_driver *ddp, char *buf) 6429 { 6430 return scnprintf(buf, PAGE_SIZE, "%u\n", sdebug_guard); 6431 } 6432 static DRIVER_ATTR_RO(guard); 6433 6434 static ssize_t ato_show(struct device_driver *ddp, char *buf) 6435 { 6436 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_ato); 6437 } 6438 static DRIVER_ATTR_RO(ato); 6439 6440 static ssize_t map_show(struct device_driver *ddp, char *buf) 6441 { 6442 ssize_t count = 0; 6443 6444 if (!scsi_debug_lbp()) 6445 return scnprintf(buf, PAGE_SIZE, "0-%u\n", 6446 sdebug_store_sectors); 6447 6448 if (sdebug_fake_rw == 0 && !xa_empty(per_store_ap)) { 6449 struct sdeb_store_info *sip = xa_load(per_store_ap, 0); 6450 6451 if (sip) 6452 count = scnprintf(buf, PAGE_SIZE - 1, "%*pbl", 6453 (int)map_size, sip->map_storep); 6454 } 6455 buf[count++] = '\n'; 6456 buf[count] = '\0'; 6457 6458 return count; 6459 } 6460 static DRIVER_ATTR_RO(map); 6461 6462 static ssize_t random_show(struct device_driver *ddp, char *buf) 6463 { 6464 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_random); 6465 } 6466 6467 static ssize_t random_store(struct device_driver *ddp, const char *buf, 6468 size_t count) 6469 { 6470 bool v; 6471 6472 if (kstrtobool(buf, &v)) 6473 return -EINVAL; 6474 6475 sdebug_random = v; 6476 return count; 6477 } 6478 static DRIVER_ATTR_RW(random); 6479 6480 static ssize_t removable_show(struct device_driver *ddp, char *buf) 6481 { 6482 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_removable ? 1 : 0); 6483 } 6484 static ssize_t removable_store(struct device_driver *ddp, const char *buf, 6485 size_t count) 6486 { 6487 int n; 6488 6489 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) { 6490 sdebug_removable = (n > 0); 6491 return count; 6492 } 6493 return -EINVAL; 6494 } 6495 static DRIVER_ATTR_RW(removable); 6496 6497 static ssize_t host_lock_show(struct device_driver *ddp, char *buf) 6498 { 6499 return scnprintf(buf, PAGE_SIZE, "%d\n", !!sdebug_host_lock); 6500 } 6501 /* N.B. sdebug_host_lock does nothing, kept for backward compatibility */ 6502 static ssize_t host_lock_store(struct device_driver *ddp, const char *buf, 6503 size_t count) 6504 { 6505 int n; 6506 6507 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) { 6508 sdebug_host_lock = (n > 0); 6509 return count; 6510 } 6511 return -EINVAL; 6512 } 6513 static DRIVER_ATTR_RW(host_lock); 6514 6515 static ssize_t strict_show(struct device_driver *ddp, char *buf) 6516 { 6517 return scnprintf(buf, PAGE_SIZE, "%d\n", !!sdebug_strict); 6518 } 6519 static ssize_t strict_store(struct device_driver *ddp, const char *buf, 6520 size_t count) 6521 { 6522 int n; 6523 6524 if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) { 6525 sdebug_strict = (n > 0); 6526 return count; 6527 } 6528 return -EINVAL; 6529 } 6530 static DRIVER_ATTR_RW(strict); 6531 6532 static ssize_t uuid_ctl_show(struct device_driver *ddp, char *buf) 6533 { 6534 return scnprintf(buf, PAGE_SIZE, "%d\n", !!sdebug_uuid_ctl); 6535 } 6536 static DRIVER_ATTR_RO(uuid_ctl); 6537 6538 static ssize_t cdb_len_show(struct device_driver *ddp, char *buf) 6539 { 6540 return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_cdb_len); 6541 } 6542 static ssize_t cdb_len_store(struct device_driver *ddp, const char *buf, 6543 size_t count) 6544 { 6545 int ret, n; 6546 6547 ret = kstrtoint(buf, 0, &n); 6548 if (ret) 6549 return ret; 6550 sdebug_cdb_len = n; 6551 all_config_cdb_len(); 6552 return count; 6553 } 6554 static DRIVER_ATTR_RW(cdb_len); 6555 6556 static const char * const zbc_model_strs_a[] = { 6557 [BLK_ZONED_NONE] = "none", 6558 [BLK_ZONED_HA] = "host-aware", 6559 [BLK_ZONED_HM] = "host-managed", 6560 }; 6561 6562 static const char * const zbc_model_strs_b[] = { 6563 [BLK_ZONED_NONE] = "no", 6564 [BLK_ZONED_HA] = "aware", 6565 [BLK_ZONED_HM] = "managed", 6566 }; 6567 6568 static const char * const zbc_model_strs_c[] = { 6569 [BLK_ZONED_NONE] = "0", 6570 [BLK_ZONED_HA] = "1", 6571 [BLK_ZONED_HM] = "2", 6572 }; 6573 6574 static int sdeb_zbc_model_str(const char *cp) 6575 { 6576 int res = sysfs_match_string(zbc_model_strs_a, cp); 6577 6578 if (res < 0) { 6579 res = sysfs_match_string(zbc_model_strs_b, cp); 6580 if (res < 0) { 6581 res = sysfs_match_string(zbc_model_strs_c, cp); 6582 if (res < 0) 6583 return -EINVAL; 6584 } 6585 } 6586 return res; 6587 } 6588 6589 static ssize_t zbc_show(struct device_driver *ddp, char *buf) 6590 { 6591 return scnprintf(buf, PAGE_SIZE, "%s\n", 6592 zbc_model_strs_a[sdeb_zbc_model]); 6593 } 6594 static DRIVER_ATTR_RO(zbc); 6595 6596 static ssize_t tur_ms_to_ready_show(struct device_driver *ddp, char *buf) 6597 { 6598 return scnprintf(buf, PAGE_SIZE, "%d\n", sdeb_tur_ms_to_ready); 6599 } 6600 static DRIVER_ATTR_RO(tur_ms_to_ready); 6601 6602 /* Note: The following array creates attribute files in the 6603 /sys/bus/pseudo/drivers/scsi_debug directory. The advantage of these 6604 files (over those found in the /sys/module/scsi_debug/parameters 6605 directory) is that auxiliary actions can be triggered when an attribute 6606 is changed. For example see: add_host_store() above. 6607 */ 6608 6609 static struct attribute *sdebug_drv_attrs[] = { 6610 &driver_attr_delay.attr, 6611 &driver_attr_opts.attr, 6612 &driver_attr_ptype.attr, 6613 &driver_attr_dsense.attr, 6614 &driver_attr_fake_rw.attr, 6615 &driver_attr_host_max_queue.attr, 6616 &driver_attr_no_lun_0.attr, 6617 &driver_attr_num_tgts.attr, 6618 &driver_attr_dev_size_mb.attr, 6619 &driver_attr_num_parts.attr, 6620 &driver_attr_every_nth.attr, 6621 &driver_attr_lun_format.attr, 6622 &driver_attr_max_luns.attr, 6623 &driver_attr_max_queue.attr, 6624 &driver_attr_no_uld.attr, 6625 &driver_attr_scsi_level.attr, 6626 &driver_attr_virtual_gb.attr, 6627 &driver_attr_add_host.attr, 6628 &driver_attr_per_host_store.attr, 6629 &driver_attr_vpd_use_hostno.attr, 6630 &driver_attr_sector_size.attr, 6631 &driver_attr_statistics.attr, 6632 &driver_attr_submit_queues.attr, 6633 &driver_attr_dix.attr, 6634 &driver_attr_dif.attr, 6635 &driver_attr_guard.attr, 6636 &driver_attr_ato.attr, 6637 &driver_attr_map.attr, 6638 &driver_attr_random.attr, 6639 &driver_attr_removable.attr, 6640 &driver_attr_host_lock.attr, 6641 &driver_attr_ndelay.attr, 6642 &driver_attr_strict.attr, 6643 &driver_attr_uuid_ctl.attr, 6644 &driver_attr_cdb_len.attr, 6645 &driver_attr_tur_ms_to_ready.attr, 6646 &driver_attr_zbc.attr, 6647 NULL, 6648 }; 6649 ATTRIBUTE_GROUPS(sdebug_drv); 6650 6651 static struct device *pseudo_primary; 6652 6653 static int __init scsi_debug_init(void) 6654 { 6655 bool want_store = (sdebug_fake_rw == 0); 6656 unsigned long sz; 6657 int k, ret, hosts_to_add; 6658 int idx = -1; 6659 6660 ramdisk_lck_a[0] = &atomic_rw; 6661 ramdisk_lck_a[1] = &atomic_rw2; 6662 atomic_set(&retired_max_queue, 0); 6663 6664 if (sdebug_ndelay >= 1000 * 1000 * 1000) { 6665 pr_warn("ndelay must be less than 1 second, ignored\n"); 6666 sdebug_ndelay = 0; 6667 } else if (sdebug_ndelay > 0) 6668 sdebug_jdelay = JDELAY_OVERRIDDEN; 6669 6670 switch (sdebug_sector_size) { 6671 case 512: 6672 case 1024: 6673 case 2048: 6674 case 4096: 6675 break; 6676 default: 6677 pr_err("invalid sector_size %d\n", sdebug_sector_size); 6678 return -EINVAL; 6679 } 6680 6681 switch (sdebug_dif) { 6682 case T10_PI_TYPE0_PROTECTION: 6683 break; 6684 case T10_PI_TYPE1_PROTECTION: 6685 case T10_PI_TYPE2_PROTECTION: 6686 case T10_PI_TYPE3_PROTECTION: 6687 have_dif_prot = true; 6688 break; 6689 6690 default: 6691 pr_err("dif must be 0, 1, 2 or 3\n"); 6692 return -EINVAL; 6693 } 6694 6695 if (sdebug_num_tgts < 0) { 6696 pr_err("num_tgts must be >= 0\n"); 6697 return -EINVAL; 6698 } 6699 6700 if (sdebug_guard > 1) { 6701 pr_err("guard must be 0 or 1\n"); 6702 return -EINVAL; 6703 } 6704 6705 if (sdebug_ato > 1) { 6706 pr_err("ato must be 0 or 1\n"); 6707 return -EINVAL; 6708 } 6709 6710 if (sdebug_physblk_exp > 15) { 6711 pr_err("invalid physblk_exp %u\n", sdebug_physblk_exp); 6712 return -EINVAL; 6713 } 6714 6715 sdebug_lun_am = sdebug_lun_am_i; 6716 if (sdebug_lun_am > SAM_LUN_AM_FLAT) { 6717 pr_warn("Invalid LUN format %u, using default\n", (int)sdebug_lun_am); 6718 sdebug_lun_am = SAM_LUN_AM_PERIPHERAL; 6719 } 6720 6721 if (sdebug_max_luns > 256) { 6722 if (sdebug_max_luns > 16384) { 6723 pr_warn("max_luns can be no more than 16384, use default\n"); 6724 sdebug_max_luns = DEF_MAX_LUNS; 6725 } 6726 sdebug_lun_am = SAM_LUN_AM_FLAT; 6727 } 6728 6729 if (sdebug_lowest_aligned > 0x3fff) { 6730 pr_err("lowest_aligned too big: %u\n", sdebug_lowest_aligned); 6731 return -EINVAL; 6732 } 6733 6734 if (submit_queues < 1) { 6735 pr_err("submit_queues must be 1 or more\n"); 6736 return -EINVAL; 6737 } 6738 6739 if ((sdebug_max_queue > SDEBUG_CANQUEUE) || (sdebug_max_queue < 1)) { 6740 pr_err("max_queue must be in range [1, %d]\n", SDEBUG_CANQUEUE); 6741 return -EINVAL; 6742 } 6743 6744 if ((sdebug_host_max_queue > SDEBUG_CANQUEUE) || 6745 (sdebug_host_max_queue < 0)) { 6746 pr_err("host_max_queue must be in range [0 %d]\n", 6747 SDEBUG_CANQUEUE); 6748 return -EINVAL; 6749 } 6750 6751 if (sdebug_host_max_queue && 6752 (sdebug_max_queue != sdebug_host_max_queue)) { 6753 sdebug_max_queue = sdebug_host_max_queue; 6754 pr_warn("fixing max submit queue depth to host max queue depth, %d\n", 6755 sdebug_max_queue); 6756 } 6757 6758 sdebug_q_arr = kcalloc(submit_queues, sizeof(struct sdebug_queue), 6759 GFP_KERNEL); 6760 if (sdebug_q_arr == NULL) 6761 return -ENOMEM; 6762 for (k = 0; k < submit_queues; ++k) 6763 spin_lock_init(&sdebug_q_arr[k].qc_lock); 6764 6765 /* 6766 * check for host managed zoned block device specified with 6767 * ptype=0x14 or zbc=XXX. 6768 */ 6769 if (sdebug_ptype == TYPE_ZBC) { 6770 sdeb_zbc_model = BLK_ZONED_HM; 6771 } else if (sdeb_zbc_model_s && *sdeb_zbc_model_s) { 6772 k = sdeb_zbc_model_str(sdeb_zbc_model_s); 6773 if (k < 0) { 6774 ret = k; 6775 goto free_q_arr; 6776 } 6777 sdeb_zbc_model = k; 6778 switch (sdeb_zbc_model) { 6779 case BLK_ZONED_NONE: 6780 case BLK_ZONED_HA: 6781 sdebug_ptype = TYPE_DISK; 6782 break; 6783 case BLK_ZONED_HM: 6784 sdebug_ptype = TYPE_ZBC; 6785 break; 6786 default: 6787 pr_err("Invalid ZBC model\n"); 6788 ret = -EINVAL; 6789 goto free_q_arr; 6790 } 6791 } 6792 if (sdeb_zbc_model != BLK_ZONED_NONE) { 6793 sdeb_zbc_in_use = true; 6794 if (sdebug_dev_size_mb == DEF_DEV_SIZE_PRE_INIT) 6795 sdebug_dev_size_mb = DEF_ZBC_DEV_SIZE_MB; 6796 } 6797 6798 if (sdebug_dev_size_mb == DEF_DEV_SIZE_PRE_INIT) 6799 sdebug_dev_size_mb = DEF_DEV_SIZE_MB; 6800 if (sdebug_dev_size_mb < 1) 6801 sdebug_dev_size_mb = 1; /* force minimum 1 MB ramdisk */ 6802 sz = (unsigned long)sdebug_dev_size_mb * 1048576; 6803 sdebug_store_sectors = sz / sdebug_sector_size; 6804 sdebug_capacity = get_sdebug_capacity(); 6805 6806 /* play around with geometry, don't waste too much on track 0 */ 6807 sdebug_heads = 8; 6808 sdebug_sectors_per = 32; 6809 if (sdebug_dev_size_mb >= 256) 6810 sdebug_heads = 64; 6811 else if (sdebug_dev_size_mb >= 16) 6812 sdebug_heads = 32; 6813 sdebug_cylinders_per = (unsigned long)sdebug_capacity / 6814 (sdebug_sectors_per * sdebug_heads); 6815 if (sdebug_cylinders_per >= 1024) { 6816 /* other LLDs do this; implies >= 1GB ram disk ... */ 6817 sdebug_heads = 255; 6818 sdebug_sectors_per = 63; 6819 sdebug_cylinders_per = (unsigned long)sdebug_capacity / 6820 (sdebug_sectors_per * sdebug_heads); 6821 } 6822 if (scsi_debug_lbp()) { 6823 sdebug_unmap_max_blocks = 6824 clamp(sdebug_unmap_max_blocks, 0U, 0xffffffffU); 6825 6826 sdebug_unmap_max_desc = 6827 clamp(sdebug_unmap_max_desc, 0U, 256U); 6828 6829 sdebug_unmap_granularity = 6830 clamp(sdebug_unmap_granularity, 1U, 0xffffffffU); 6831 6832 if (sdebug_unmap_alignment && 6833 sdebug_unmap_granularity <= 6834 sdebug_unmap_alignment) { 6835 pr_err("ERR: unmap_granularity <= unmap_alignment\n"); 6836 ret = -EINVAL; 6837 goto free_q_arr; 6838 } 6839 } 6840 xa_init_flags(per_store_ap, XA_FLAGS_ALLOC | XA_FLAGS_LOCK_IRQ); 6841 if (want_store) { 6842 idx = sdebug_add_store(); 6843 if (idx < 0) { 6844 ret = idx; 6845 goto free_q_arr; 6846 } 6847 } 6848 6849 pseudo_primary = root_device_register("pseudo_0"); 6850 if (IS_ERR(pseudo_primary)) { 6851 pr_warn("root_device_register() error\n"); 6852 ret = PTR_ERR(pseudo_primary); 6853 goto free_vm; 6854 } 6855 ret = bus_register(&pseudo_lld_bus); 6856 if (ret < 0) { 6857 pr_warn("bus_register error: %d\n", ret); 6858 goto dev_unreg; 6859 } 6860 ret = driver_register(&sdebug_driverfs_driver); 6861 if (ret < 0) { 6862 pr_warn("driver_register error: %d\n", ret); 6863 goto bus_unreg; 6864 } 6865 6866 hosts_to_add = sdebug_add_host; 6867 sdebug_add_host = 0; 6868 6869 for (k = 0; k < hosts_to_add; k++) { 6870 if (want_store && k == 0) { 6871 ret = sdebug_add_host_helper(idx); 6872 if (ret < 0) { 6873 pr_err("add_host_helper k=%d, error=%d\n", 6874 k, -ret); 6875 break; 6876 } 6877 } else { 6878 ret = sdebug_do_add_host(want_store && 6879 sdebug_per_host_store); 6880 if (ret < 0) { 6881 pr_err("add_host k=%d error=%d\n", k, -ret); 6882 break; 6883 } 6884 } 6885 } 6886 if (sdebug_verbose) 6887 pr_info("built %d host(s)\n", sdebug_num_hosts); 6888 6889 return 0; 6890 6891 bus_unreg: 6892 bus_unregister(&pseudo_lld_bus); 6893 dev_unreg: 6894 root_device_unregister(pseudo_primary); 6895 free_vm: 6896 sdebug_erase_store(idx, NULL); 6897 free_q_arr: 6898 kfree(sdebug_q_arr); 6899 return ret; 6900 } 6901 6902 static void __exit scsi_debug_exit(void) 6903 { 6904 int k = sdebug_num_hosts; 6905 6906 stop_all_queued(); 6907 for (; k; k--) 6908 sdebug_do_remove_host(true); 6909 free_all_queued(); 6910 driver_unregister(&sdebug_driverfs_driver); 6911 bus_unregister(&pseudo_lld_bus); 6912 root_device_unregister(pseudo_primary); 6913 6914 sdebug_erase_all_stores(false); 6915 xa_destroy(per_store_ap); 6916 kfree(sdebug_q_arr); 6917 } 6918 6919 device_initcall(scsi_debug_init); 6920 module_exit(scsi_debug_exit); 6921 6922 static void sdebug_release_adapter(struct device *dev) 6923 { 6924 struct sdebug_host_info *sdbg_host; 6925 6926 sdbg_host = to_sdebug_host(dev); 6927 kfree(sdbg_host); 6928 } 6929 6930 /* idx must be valid, if sip is NULL then it will be obtained using idx */ 6931 static void sdebug_erase_store(int idx, struct sdeb_store_info *sip) 6932 { 6933 if (idx < 0) 6934 return; 6935 if (!sip) { 6936 if (xa_empty(per_store_ap)) 6937 return; 6938 sip = xa_load(per_store_ap, idx); 6939 if (!sip) 6940 return; 6941 } 6942 vfree(sip->map_storep); 6943 vfree(sip->dif_storep); 6944 vfree(sip->storep); 6945 xa_erase(per_store_ap, idx); 6946 kfree(sip); 6947 } 6948 6949 /* Assume apart_from_first==false only in shutdown case. */ 6950 static void sdebug_erase_all_stores(bool apart_from_first) 6951 { 6952 unsigned long idx; 6953 struct sdeb_store_info *sip = NULL; 6954 6955 xa_for_each(per_store_ap, idx, sip) { 6956 if (apart_from_first) 6957 apart_from_first = false; 6958 else 6959 sdebug_erase_store(idx, sip); 6960 } 6961 if (apart_from_first) 6962 sdeb_most_recent_idx = sdeb_first_idx; 6963 } 6964 6965 /* 6966 * Returns store xarray new element index (idx) if >=0 else negated errno. 6967 * Limit the number of stores to 65536. 6968 */ 6969 static int sdebug_add_store(void) 6970 { 6971 int res; 6972 u32 n_idx; 6973 unsigned long iflags; 6974 unsigned long sz = (unsigned long)sdebug_dev_size_mb * 1048576; 6975 struct sdeb_store_info *sip = NULL; 6976 struct xa_limit xal = { .max = 1 << 16, .min = 0 }; 6977 6978 sip = kzalloc(sizeof(*sip), GFP_KERNEL); 6979 if (!sip) 6980 return -ENOMEM; 6981 6982 xa_lock_irqsave(per_store_ap, iflags); 6983 res = __xa_alloc(per_store_ap, &n_idx, sip, xal, GFP_ATOMIC); 6984 if (unlikely(res < 0)) { 6985 xa_unlock_irqrestore(per_store_ap, iflags); 6986 kfree(sip); 6987 pr_warn("%s: xa_alloc() errno=%d\n", __func__, -res); 6988 return res; 6989 } 6990 sdeb_most_recent_idx = n_idx; 6991 if (sdeb_first_idx < 0) 6992 sdeb_first_idx = n_idx; 6993 xa_unlock_irqrestore(per_store_ap, iflags); 6994 6995 res = -ENOMEM; 6996 sip->storep = vzalloc(sz); 6997 if (!sip->storep) { 6998 pr_err("user data oom\n"); 6999 goto err; 7000 } 7001 if (sdebug_num_parts > 0) 7002 sdebug_build_parts(sip->storep, sz); 7003 7004 /* DIF/DIX: what T10 calls Protection Information (PI) */ 7005 if (sdebug_dix) { 7006 int dif_size; 7007 7008 dif_size = sdebug_store_sectors * sizeof(struct t10_pi_tuple); 7009 sip->dif_storep = vmalloc(dif_size); 7010 7011 pr_info("dif_storep %u bytes @ %pK\n", dif_size, 7012 sip->dif_storep); 7013 7014 if (!sip->dif_storep) { 7015 pr_err("DIX oom\n"); 7016 goto err; 7017 } 7018 memset(sip->dif_storep, 0xff, dif_size); 7019 } 7020 /* Logical Block Provisioning */ 7021 if (scsi_debug_lbp()) { 7022 map_size = lba_to_map_index(sdebug_store_sectors - 1) + 1; 7023 sip->map_storep = vmalloc(array_size(sizeof(long), 7024 BITS_TO_LONGS(map_size))); 7025 7026 pr_info("%lu provisioning blocks\n", map_size); 7027 7028 if (!sip->map_storep) { 7029 pr_err("LBP map oom\n"); 7030 goto err; 7031 } 7032 7033 bitmap_zero(sip->map_storep, map_size); 7034 7035 /* Map first 1KB for partition table */ 7036 if (sdebug_num_parts) 7037 map_region(sip, 0, 2); 7038 } 7039 7040 rwlock_init(&sip->macc_lck); 7041 return (int)n_idx; 7042 err: 7043 sdebug_erase_store((int)n_idx, sip); 7044 pr_warn("%s: failed, errno=%d\n", __func__, -res); 7045 return res; 7046 } 7047 7048 static int sdebug_add_host_helper(int per_host_idx) 7049 { 7050 int k, devs_per_host, idx; 7051 int error = -ENOMEM; 7052 struct sdebug_host_info *sdbg_host; 7053 struct sdebug_dev_info *sdbg_devinfo, *tmp; 7054 7055 sdbg_host = kzalloc(sizeof(*sdbg_host), GFP_KERNEL); 7056 if (!sdbg_host) 7057 return -ENOMEM; 7058 idx = (per_host_idx < 0) ? sdeb_first_idx : per_host_idx; 7059 if (xa_get_mark(per_store_ap, idx, SDEB_XA_NOT_IN_USE)) 7060 xa_clear_mark(per_store_ap, idx, SDEB_XA_NOT_IN_USE); 7061 sdbg_host->si_idx = idx; 7062 7063 INIT_LIST_HEAD(&sdbg_host->dev_info_list); 7064 7065 devs_per_host = sdebug_num_tgts * sdebug_max_luns; 7066 for (k = 0; k < devs_per_host; k++) { 7067 sdbg_devinfo = sdebug_device_create(sdbg_host, GFP_KERNEL); 7068 if (!sdbg_devinfo) 7069 goto clean; 7070 } 7071 7072 spin_lock(&sdebug_host_list_lock); 7073 list_add_tail(&sdbg_host->host_list, &sdebug_host_list); 7074 spin_unlock(&sdebug_host_list_lock); 7075 7076 sdbg_host->dev.bus = &pseudo_lld_bus; 7077 sdbg_host->dev.parent = pseudo_primary; 7078 sdbg_host->dev.release = &sdebug_release_adapter; 7079 dev_set_name(&sdbg_host->dev, "adapter%d", sdebug_num_hosts); 7080 7081 error = device_register(&sdbg_host->dev); 7082 if (error) 7083 goto clean; 7084 7085 ++sdebug_num_hosts; 7086 return 0; 7087 7088 clean: 7089 list_for_each_entry_safe(sdbg_devinfo, tmp, &sdbg_host->dev_info_list, 7090 dev_list) { 7091 list_del(&sdbg_devinfo->dev_list); 7092 kfree(sdbg_devinfo->zstate); 7093 kfree(sdbg_devinfo); 7094 } 7095 kfree(sdbg_host); 7096 pr_warn("%s: failed, errno=%d\n", __func__, -error); 7097 return error; 7098 } 7099 7100 static int sdebug_do_add_host(bool mk_new_store) 7101 { 7102 int ph_idx = sdeb_most_recent_idx; 7103 7104 if (mk_new_store) { 7105 ph_idx = sdebug_add_store(); 7106 if (ph_idx < 0) 7107 return ph_idx; 7108 } 7109 return sdebug_add_host_helper(ph_idx); 7110 } 7111 7112 static void sdebug_do_remove_host(bool the_end) 7113 { 7114 int idx = -1; 7115 struct sdebug_host_info *sdbg_host = NULL; 7116 struct sdebug_host_info *sdbg_host2; 7117 7118 spin_lock(&sdebug_host_list_lock); 7119 if (!list_empty(&sdebug_host_list)) { 7120 sdbg_host = list_entry(sdebug_host_list.prev, 7121 struct sdebug_host_info, host_list); 7122 idx = sdbg_host->si_idx; 7123 } 7124 if (!the_end && idx >= 0) { 7125 bool unique = true; 7126 7127 list_for_each_entry(sdbg_host2, &sdebug_host_list, host_list) { 7128 if (sdbg_host2 == sdbg_host) 7129 continue; 7130 if (idx == sdbg_host2->si_idx) { 7131 unique = false; 7132 break; 7133 } 7134 } 7135 if (unique) { 7136 xa_set_mark(per_store_ap, idx, SDEB_XA_NOT_IN_USE); 7137 if (idx == sdeb_most_recent_idx) 7138 --sdeb_most_recent_idx; 7139 } 7140 } 7141 if (sdbg_host) 7142 list_del(&sdbg_host->host_list); 7143 spin_unlock(&sdebug_host_list_lock); 7144 7145 if (!sdbg_host) 7146 return; 7147 7148 device_unregister(&sdbg_host->dev); 7149 --sdebug_num_hosts; 7150 } 7151 7152 static int sdebug_change_qdepth(struct scsi_device *sdev, int qdepth) 7153 { 7154 int num_in_q = 0; 7155 struct sdebug_dev_info *devip; 7156 7157 block_unblock_all_queues(true); 7158 devip = (struct sdebug_dev_info *)sdev->hostdata; 7159 if (NULL == devip) { 7160 block_unblock_all_queues(false); 7161 return -ENODEV; 7162 } 7163 num_in_q = atomic_read(&devip->num_in_q); 7164 7165 if (qdepth > SDEBUG_CANQUEUE) { 7166 qdepth = SDEBUG_CANQUEUE; 7167 pr_warn("%s: requested qdepth [%d] exceeds canqueue [%d], trim\n", __func__, 7168 qdepth, SDEBUG_CANQUEUE); 7169 } 7170 if (qdepth < 1) 7171 qdepth = 1; 7172 if (qdepth != sdev->queue_depth) 7173 scsi_change_queue_depth(sdev, qdepth); 7174 7175 if (SDEBUG_OPT_Q_NOISE & sdebug_opts) { 7176 sdev_printk(KERN_INFO, sdev, "%s: qdepth=%d, num_in_q=%d\n", 7177 __func__, qdepth, num_in_q); 7178 } 7179 block_unblock_all_queues(false); 7180 return sdev->queue_depth; 7181 } 7182 7183 static bool fake_timeout(struct scsi_cmnd *scp) 7184 { 7185 if (0 == (atomic_read(&sdebug_cmnd_count) % abs(sdebug_every_nth))) { 7186 if (sdebug_every_nth < -1) 7187 sdebug_every_nth = -1; 7188 if (SDEBUG_OPT_TIMEOUT & sdebug_opts) 7189 return true; /* ignore command causing timeout */ 7190 else if (SDEBUG_OPT_MAC_TIMEOUT & sdebug_opts && 7191 scsi_medium_access_command(scp)) 7192 return true; /* time out reads and writes */ 7193 } 7194 return false; 7195 } 7196 7197 /* Response to TUR or media access command when device stopped */ 7198 static int resp_not_ready(struct scsi_cmnd *scp, struct sdebug_dev_info *devip) 7199 { 7200 int stopped_state; 7201 u64 diff_ns = 0; 7202 ktime_t now_ts = ktime_get_boottime(); 7203 struct scsi_device *sdp = scp->device; 7204 7205 stopped_state = atomic_read(&devip->stopped); 7206 if (stopped_state == 2) { 7207 if (ktime_to_ns(now_ts) > ktime_to_ns(devip->create_ts)) { 7208 diff_ns = ktime_to_ns(ktime_sub(now_ts, devip->create_ts)); 7209 if (diff_ns >= ((u64)sdeb_tur_ms_to_ready * 1000000)) { 7210 /* tur_ms_to_ready timer extinguished */ 7211 atomic_set(&devip->stopped, 0); 7212 return 0; 7213 } 7214 } 7215 mk_sense_buffer(scp, NOT_READY, LOGICAL_UNIT_NOT_READY, 0x1); 7216 if (sdebug_verbose) 7217 sdev_printk(KERN_INFO, sdp, 7218 "%s: Not ready: in process of becoming ready\n", my_name); 7219 if (scp->cmnd[0] == TEST_UNIT_READY) { 7220 u64 tur_nanosecs_to_ready = (u64)sdeb_tur_ms_to_ready * 1000000; 7221 7222 if (diff_ns <= tur_nanosecs_to_ready) 7223 diff_ns = tur_nanosecs_to_ready - diff_ns; 7224 else 7225 diff_ns = tur_nanosecs_to_ready; 7226 /* As per 20-061r2 approved for spc6 by T10 on 20200716 */ 7227 do_div(diff_ns, 1000000); /* diff_ns becomes milliseconds */ 7228 scsi_set_sense_information(scp->sense_buffer, SCSI_SENSE_BUFFERSIZE, 7229 diff_ns); 7230 return check_condition_result; 7231 } 7232 } 7233 mk_sense_buffer(scp, NOT_READY, LOGICAL_UNIT_NOT_READY, 0x2); 7234 if (sdebug_verbose) 7235 sdev_printk(KERN_INFO, sdp, "%s: Not ready: initializing command required\n", 7236 my_name); 7237 return check_condition_result; 7238 } 7239 7240 static int sdebug_map_queues(struct Scsi_Host *shost) 7241 { 7242 int i, qoff; 7243 7244 if (shost->nr_hw_queues == 1) 7245 return 0; 7246 7247 for (i = 0, qoff = 0; i < HCTX_MAX_TYPES; i++) { 7248 struct blk_mq_queue_map *map = &shost->tag_set.map[i]; 7249 7250 map->nr_queues = 0; 7251 7252 if (i == HCTX_TYPE_DEFAULT) 7253 map->nr_queues = submit_queues - poll_queues; 7254 else if (i == HCTX_TYPE_POLL) 7255 map->nr_queues = poll_queues; 7256 7257 if (!map->nr_queues) { 7258 BUG_ON(i == HCTX_TYPE_DEFAULT); 7259 continue; 7260 } 7261 7262 map->queue_offset = qoff; 7263 blk_mq_map_queues(map); 7264 7265 qoff += map->nr_queues; 7266 } 7267 7268 return 0; 7269 7270 } 7271 7272 static int sdebug_blk_mq_poll(struct Scsi_Host *shost, unsigned int queue_num) 7273 { 7274 bool first; 7275 bool retiring = false; 7276 int num_entries = 0; 7277 unsigned int qc_idx = 0; 7278 unsigned long iflags; 7279 ktime_t kt_from_boot = ktime_get_boottime(); 7280 struct sdebug_queue *sqp; 7281 struct sdebug_queued_cmd *sqcp; 7282 struct scsi_cmnd *scp; 7283 struct sdebug_dev_info *devip; 7284 struct sdebug_defer *sd_dp; 7285 7286 sqp = sdebug_q_arr + queue_num; 7287 spin_lock_irqsave(&sqp->qc_lock, iflags); 7288 7289 for (first = true; first || qc_idx + 1 < sdebug_max_queue; ) { 7290 if (first) { 7291 qc_idx = find_first_bit(sqp->in_use_bm, sdebug_max_queue); 7292 first = false; 7293 } else { 7294 qc_idx = find_next_bit(sqp->in_use_bm, sdebug_max_queue, qc_idx + 1); 7295 } 7296 if (unlikely(qc_idx >= sdebug_max_queue)) 7297 break; 7298 7299 sqcp = &sqp->qc_arr[qc_idx]; 7300 sd_dp = sqcp->sd_dp; 7301 if (unlikely(!sd_dp)) 7302 continue; 7303 scp = sqcp->a_cmnd; 7304 if (unlikely(scp == NULL)) { 7305 pr_err("scp is NULL, queue_num=%d, qc_idx=%u from %s\n", 7306 queue_num, qc_idx, __func__); 7307 break; 7308 } 7309 if (sd_dp->defer_t == SDEB_DEFER_POLL) { 7310 if (kt_from_boot < sd_dp->cmpl_ts) 7311 continue; 7312 7313 } else /* ignoring non REQ_HIPRI requests */ 7314 continue; 7315 devip = (struct sdebug_dev_info *)scp->device->hostdata; 7316 if (likely(devip)) 7317 atomic_dec(&devip->num_in_q); 7318 else 7319 pr_err("devip=NULL from %s\n", __func__); 7320 if (unlikely(atomic_read(&retired_max_queue) > 0)) 7321 retiring = true; 7322 7323 sqcp->a_cmnd = NULL; 7324 if (unlikely(!test_and_clear_bit(qc_idx, sqp->in_use_bm))) { 7325 pr_err("Unexpected completion sqp %p queue_num=%d qc_idx=%u from %s\n", 7326 sqp, queue_num, qc_idx, __func__); 7327 break; 7328 } 7329 if (unlikely(retiring)) { /* user has reduced max_queue */ 7330 int k, retval; 7331 7332 retval = atomic_read(&retired_max_queue); 7333 if (qc_idx >= retval) { 7334 pr_err("index %d too large\n", retval); 7335 break; 7336 } 7337 k = find_last_bit(sqp->in_use_bm, retval); 7338 if ((k < sdebug_max_queue) || (k == retval)) 7339 atomic_set(&retired_max_queue, 0); 7340 else 7341 atomic_set(&retired_max_queue, k + 1); 7342 } 7343 sd_dp->defer_t = SDEB_DEFER_NONE; 7344 spin_unlock_irqrestore(&sqp->qc_lock, iflags); 7345 scp->scsi_done(scp); /* callback to mid level */ 7346 spin_lock_irqsave(&sqp->qc_lock, iflags); 7347 num_entries++; 7348 } 7349 spin_unlock_irqrestore(&sqp->qc_lock, iflags); 7350 if (num_entries > 0) 7351 atomic_add(num_entries, &sdeb_mq_poll_count); 7352 return num_entries; 7353 } 7354 7355 static int scsi_debug_queuecommand(struct Scsi_Host *shost, 7356 struct scsi_cmnd *scp) 7357 { 7358 u8 sdeb_i; 7359 struct scsi_device *sdp = scp->device; 7360 const struct opcode_info_t *oip; 7361 const struct opcode_info_t *r_oip; 7362 struct sdebug_dev_info *devip; 7363 u8 *cmd = scp->cmnd; 7364 int (*r_pfp)(struct scsi_cmnd *, struct sdebug_dev_info *); 7365 int (*pfp)(struct scsi_cmnd *, struct sdebug_dev_info *) = NULL; 7366 int k, na; 7367 int errsts = 0; 7368 u64 lun_index = sdp->lun & 0x3FFF; 7369 u32 flags; 7370 u16 sa; 7371 u8 opcode = cmd[0]; 7372 bool has_wlun_rl; 7373 bool inject_now; 7374 7375 scsi_set_resid(scp, 0); 7376 if (sdebug_statistics) { 7377 atomic_inc(&sdebug_cmnd_count); 7378 inject_now = inject_on_this_cmd(); 7379 } else { 7380 inject_now = false; 7381 } 7382 if (unlikely(sdebug_verbose && 7383 !(SDEBUG_OPT_NO_CDB_NOISE & sdebug_opts))) { 7384 char b[120]; 7385 int n, len, sb; 7386 7387 len = scp->cmd_len; 7388 sb = (int)sizeof(b); 7389 if (len > 32) 7390 strcpy(b, "too long, over 32 bytes"); 7391 else { 7392 for (k = 0, n = 0; k < len && n < sb; ++k) 7393 n += scnprintf(b + n, sb - n, "%02x ", 7394 (u32)cmd[k]); 7395 } 7396 sdev_printk(KERN_INFO, sdp, "%s: tag=%#x, cmd %s\n", my_name, 7397 blk_mq_unique_tag(scp->request), b); 7398 } 7399 if (unlikely(inject_now && (sdebug_opts & SDEBUG_OPT_HOST_BUSY))) 7400 return SCSI_MLQUEUE_HOST_BUSY; 7401 has_wlun_rl = (sdp->lun == SCSI_W_LUN_REPORT_LUNS); 7402 if (unlikely(lun_index >= sdebug_max_luns && !has_wlun_rl)) 7403 goto err_out; 7404 7405 sdeb_i = opcode_ind_arr[opcode]; /* fully mapped */ 7406 oip = &opcode_info_arr[sdeb_i]; /* safe if table consistent */ 7407 devip = (struct sdebug_dev_info *)sdp->hostdata; 7408 if (unlikely(!devip)) { 7409 devip = find_build_dev_info(sdp); 7410 if (NULL == devip) 7411 goto err_out; 7412 } 7413 if (unlikely(inject_now && !atomic_read(&sdeb_inject_pending))) 7414 atomic_set(&sdeb_inject_pending, 1); 7415 7416 na = oip->num_attached; 7417 r_pfp = oip->pfp; 7418 if (na) { /* multiple commands with this opcode */ 7419 r_oip = oip; 7420 if (FF_SA & r_oip->flags) { 7421 if (F_SA_LOW & oip->flags) 7422 sa = 0x1f & cmd[1]; 7423 else 7424 sa = get_unaligned_be16(cmd + 8); 7425 for (k = 0; k <= na; oip = r_oip->arrp + k++) { 7426 if (opcode == oip->opcode && sa == oip->sa) 7427 break; 7428 } 7429 } else { /* since no service action only check opcode */ 7430 for (k = 0; k <= na; oip = r_oip->arrp + k++) { 7431 if (opcode == oip->opcode) 7432 break; 7433 } 7434 } 7435 if (k > na) { 7436 if (F_SA_LOW & r_oip->flags) 7437 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 4); 7438 else if (F_SA_HIGH & r_oip->flags) 7439 mk_sense_invalid_fld(scp, SDEB_IN_CDB, 8, 7); 7440 else 7441 mk_sense_invalid_opcode(scp); 7442 goto check_cond; 7443 } 7444 } /* else (when na==0) we assume the oip is a match */ 7445 flags = oip->flags; 7446 if (unlikely(F_INV_OP & flags)) { 7447 mk_sense_invalid_opcode(scp); 7448 goto check_cond; 7449 } 7450 if (unlikely(has_wlun_rl && !(F_RL_WLUN_OK & flags))) { 7451 if (sdebug_verbose) 7452 sdev_printk(KERN_INFO, sdp, "%s: Opcode 0x%x not%s\n", 7453 my_name, opcode, " supported for wlun"); 7454 mk_sense_invalid_opcode(scp); 7455 goto check_cond; 7456 } 7457 if (unlikely(sdebug_strict)) { /* check cdb against mask */ 7458 u8 rem; 7459 int j; 7460 7461 for (k = 1; k < oip->len_mask[0] && k < 16; ++k) { 7462 rem = ~oip->len_mask[k] & cmd[k]; 7463 if (rem) { 7464 for (j = 7; j >= 0; --j, rem <<= 1) { 7465 if (0x80 & rem) 7466 break; 7467 } 7468 mk_sense_invalid_fld(scp, SDEB_IN_CDB, k, j); 7469 goto check_cond; 7470 } 7471 } 7472 } 7473 if (unlikely(!(F_SKIP_UA & flags) && 7474 find_first_bit(devip->uas_bm, 7475 SDEBUG_NUM_UAS) != SDEBUG_NUM_UAS)) { 7476 errsts = make_ua(scp, devip); 7477 if (errsts) 7478 goto check_cond; 7479 } 7480 if (unlikely(((F_M_ACCESS & flags) || scp->cmnd[0] == TEST_UNIT_READY) && 7481 atomic_read(&devip->stopped))) { 7482 errsts = resp_not_ready(scp, devip); 7483 if (errsts) 7484 goto fini; 7485 } 7486 if (sdebug_fake_rw && (F_FAKE_RW & flags)) 7487 goto fini; 7488 if (unlikely(sdebug_every_nth)) { 7489 if (fake_timeout(scp)) 7490 return 0; /* ignore command: make trouble */ 7491 } 7492 if (likely(oip->pfp)) 7493 pfp = oip->pfp; /* calls a resp_* function */ 7494 else 7495 pfp = r_pfp; /* if leaf function ptr NULL, try the root's */ 7496 7497 fini: 7498 if (F_DELAY_OVERR & flags) /* cmds like INQUIRY respond asap */ 7499 return schedule_resp(scp, devip, errsts, pfp, 0, 0); 7500 else if ((flags & F_LONG_DELAY) && (sdebug_jdelay > 0 || 7501 sdebug_ndelay > 10000)) { 7502 /* 7503 * Skip long delays if ndelay <= 10 microseconds. Otherwise 7504 * for Start Stop Unit (SSU) want at least 1 second delay and 7505 * if sdebug_jdelay>1 want a long delay of that many seconds. 7506 * For Synchronize Cache want 1/20 of SSU's delay. 7507 */ 7508 int jdelay = (sdebug_jdelay < 2) ? 1 : sdebug_jdelay; 7509 int denom = (flags & F_SYNC_DELAY) ? 20 : 1; 7510 7511 jdelay = mult_frac(USER_HZ * jdelay, HZ, denom * USER_HZ); 7512 return schedule_resp(scp, devip, errsts, pfp, jdelay, 0); 7513 } else 7514 return schedule_resp(scp, devip, errsts, pfp, sdebug_jdelay, 7515 sdebug_ndelay); 7516 check_cond: 7517 return schedule_resp(scp, devip, check_condition_result, NULL, 0, 0); 7518 err_out: 7519 return schedule_resp(scp, NULL, DID_NO_CONNECT << 16, NULL, 0, 0); 7520 } 7521 7522 static struct scsi_host_template sdebug_driver_template = { 7523 .show_info = scsi_debug_show_info, 7524 .write_info = scsi_debug_write_info, 7525 .proc_name = sdebug_proc_name, 7526 .name = "SCSI DEBUG", 7527 .info = scsi_debug_info, 7528 .slave_alloc = scsi_debug_slave_alloc, 7529 .slave_configure = scsi_debug_slave_configure, 7530 .slave_destroy = scsi_debug_slave_destroy, 7531 .ioctl = scsi_debug_ioctl, 7532 .queuecommand = scsi_debug_queuecommand, 7533 .change_queue_depth = sdebug_change_qdepth, 7534 .map_queues = sdebug_map_queues, 7535 .mq_poll = sdebug_blk_mq_poll, 7536 .eh_abort_handler = scsi_debug_abort, 7537 .eh_device_reset_handler = scsi_debug_device_reset, 7538 .eh_target_reset_handler = scsi_debug_target_reset, 7539 .eh_bus_reset_handler = scsi_debug_bus_reset, 7540 .eh_host_reset_handler = scsi_debug_host_reset, 7541 .can_queue = SDEBUG_CANQUEUE, 7542 .this_id = 7, 7543 .sg_tablesize = SG_MAX_SEGMENTS, 7544 .cmd_per_lun = DEF_CMD_PER_LUN, 7545 .max_sectors = -1U, 7546 .max_segment_size = -1U, 7547 .module = THIS_MODULE, 7548 .track_queue_depth = 1, 7549 }; 7550 7551 static int sdebug_driver_probe(struct device *dev) 7552 { 7553 int error = 0; 7554 struct sdebug_host_info *sdbg_host; 7555 struct Scsi_Host *hpnt; 7556 int hprot; 7557 7558 sdbg_host = to_sdebug_host(dev); 7559 7560 sdebug_driver_template.can_queue = sdebug_max_queue; 7561 sdebug_driver_template.cmd_per_lun = sdebug_max_queue; 7562 if (!sdebug_clustering) 7563 sdebug_driver_template.dma_boundary = PAGE_SIZE - 1; 7564 7565 hpnt = scsi_host_alloc(&sdebug_driver_template, sizeof(sdbg_host)); 7566 if (NULL == hpnt) { 7567 pr_err("scsi_host_alloc failed\n"); 7568 error = -ENODEV; 7569 return error; 7570 } 7571 if (submit_queues > nr_cpu_ids) { 7572 pr_warn("%s: trim submit_queues (was %d) to nr_cpu_ids=%u\n", 7573 my_name, submit_queues, nr_cpu_ids); 7574 submit_queues = nr_cpu_ids; 7575 } 7576 /* 7577 * Decide whether to tell scsi subsystem that we want mq. The 7578 * following should give the same answer for each host. 7579 */ 7580 hpnt->nr_hw_queues = submit_queues; 7581 if (sdebug_host_max_queue) 7582 hpnt->host_tagset = 1; 7583 7584 /* poll queues are possible for nr_hw_queues > 1 */ 7585 if (hpnt->nr_hw_queues == 1 || (poll_queues < 1)) { 7586 pr_warn("%s: trim poll_queues to 0. poll_q/nr_hw = (%d/%d)\n", 7587 my_name, poll_queues, hpnt->nr_hw_queues); 7588 poll_queues = 0; 7589 } 7590 7591 /* 7592 * Poll queues don't need interrupts, but we need at least one I/O queue 7593 * left over for non-polled I/O. 7594 * If condition not met, trim poll_queues to 1 (just for simplicity). 7595 */ 7596 if (poll_queues >= submit_queues) { 7597 if (submit_queues < 3) 7598 pr_warn("%s: trim poll_queues to 1\n", my_name); 7599 else 7600 pr_warn("%s: trim poll_queues to 1. Perhaps try poll_queues=%d\n", 7601 my_name, submit_queues - 1); 7602 poll_queues = 1; 7603 } 7604 if (poll_queues) 7605 hpnt->nr_maps = 3; 7606 7607 sdbg_host->shost = hpnt; 7608 *((struct sdebug_host_info **)hpnt->hostdata) = sdbg_host; 7609 if ((hpnt->this_id >= 0) && (sdebug_num_tgts > hpnt->this_id)) 7610 hpnt->max_id = sdebug_num_tgts + 1; 7611 else 7612 hpnt->max_id = sdebug_num_tgts; 7613 /* = sdebug_max_luns; */ 7614 hpnt->max_lun = SCSI_W_LUN_REPORT_LUNS + 1; 7615 7616 hprot = 0; 7617 7618 switch (sdebug_dif) { 7619 7620 case T10_PI_TYPE1_PROTECTION: 7621 hprot = SHOST_DIF_TYPE1_PROTECTION; 7622 if (sdebug_dix) 7623 hprot |= SHOST_DIX_TYPE1_PROTECTION; 7624 break; 7625 7626 case T10_PI_TYPE2_PROTECTION: 7627 hprot = SHOST_DIF_TYPE2_PROTECTION; 7628 if (sdebug_dix) 7629 hprot |= SHOST_DIX_TYPE2_PROTECTION; 7630 break; 7631 7632 case T10_PI_TYPE3_PROTECTION: 7633 hprot = SHOST_DIF_TYPE3_PROTECTION; 7634 if (sdebug_dix) 7635 hprot |= SHOST_DIX_TYPE3_PROTECTION; 7636 break; 7637 7638 default: 7639 if (sdebug_dix) 7640 hprot |= SHOST_DIX_TYPE0_PROTECTION; 7641 break; 7642 } 7643 7644 scsi_host_set_prot(hpnt, hprot); 7645 7646 if (have_dif_prot || sdebug_dix) 7647 pr_info("host protection%s%s%s%s%s%s%s\n", 7648 (hprot & SHOST_DIF_TYPE1_PROTECTION) ? " DIF1" : "", 7649 (hprot & SHOST_DIF_TYPE2_PROTECTION) ? " DIF2" : "", 7650 (hprot & SHOST_DIF_TYPE3_PROTECTION) ? " DIF3" : "", 7651 (hprot & SHOST_DIX_TYPE0_PROTECTION) ? " DIX0" : "", 7652 (hprot & SHOST_DIX_TYPE1_PROTECTION) ? " DIX1" : "", 7653 (hprot & SHOST_DIX_TYPE2_PROTECTION) ? " DIX2" : "", 7654 (hprot & SHOST_DIX_TYPE3_PROTECTION) ? " DIX3" : ""); 7655 7656 if (sdebug_guard == 1) 7657 scsi_host_set_guard(hpnt, SHOST_DIX_GUARD_IP); 7658 else 7659 scsi_host_set_guard(hpnt, SHOST_DIX_GUARD_CRC); 7660 7661 sdebug_verbose = !!(SDEBUG_OPT_NOISE & sdebug_opts); 7662 sdebug_any_injecting_opt = !!(SDEBUG_OPT_ALL_INJECTING & sdebug_opts); 7663 if (sdebug_every_nth) /* need stats counters for every_nth */ 7664 sdebug_statistics = true; 7665 error = scsi_add_host(hpnt, &sdbg_host->dev); 7666 if (error) { 7667 pr_err("scsi_add_host failed\n"); 7668 error = -ENODEV; 7669 scsi_host_put(hpnt); 7670 } else { 7671 scsi_scan_host(hpnt); 7672 } 7673 7674 return error; 7675 } 7676 7677 static int sdebug_driver_remove(struct device *dev) 7678 { 7679 struct sdebug_host_info *sdbg_host; 7680 struct sdebug_dev_info *sdbg_devinfo, *tmp; 7681 7682 sdbg_host = to_sdebug_host(dev); 7683 7684 scsi_remove_host(sdbg_host->shost); 7685 7686 list_for_each_entry_safe(sdbg_devinfo, tmp, &sdbg_host->dev_info_list, 7687 dev_list) { 7688 list_del(&sdbg_devinfo->dev_list); 7689 kfree(sdbg_devinfo->zstate); 7690 kfree(sdbg_devinfo); 7691 } 7692 7693 scsi_host_put(sdbg_host->shost); 7694 return 0; 7695 } 7696 7697 static int pseudo_lld_bus_match(struct device *dev, 7698 struct device_driver *dev_driver) 7699 { 7700 return 1; 7701 } 7702 7703 static struct bus_type pseudo_lld_bus = { 7704 .name = "pseudo", 7705 .match = pseudo_lld_bus_match, 7706 .probe = sdebug_driver_probe, 7707 .remove = sdebug_driver_remove, 7708 .drv_groups = sdebug_drv_groups, 7709 }; 7710