1 /* 2 * SCSI helpers 3 * 4 * Copyright 2017 Red Hat, Inc. 5 * 6 * Authors: 7 * Fam Zheng <famz@redhat.com> 8 * Paolo Bonzini <pbonzini@redhat.com> 9 * 10 * This program is free software; you can redistribute it and/or modify it 11 * under the terms of the GNU General Public License as published by the Free 12 * Software Foundation; either version 2 of the License, or (at your option) 13 * any later version. 14 */ 15 16 #include "qemu/osdep.h" 17 #include "scsi/constants.h" 18 #include "scsi/utils.h" 19 #include "qemu/bswap.h" 20 21 uint32_t scsi_data_cdb_xfer(uint8_t *buf) 22 { 23 if ((buf[0] >> 5) == 0 && buf[4] == 0) { 24 return 256; 25 } else { 26 return scsi_cdb_xfer(buf); 27 } 28 } 29 30 uint32_t scsi_cdb_xfer(uint8_t *buf) 31 { 32 switch (buf[0] >> 5) { 33 case 0: 34 return buf[4]; 35 case 1: 36 case 2: 37 return lduw_be_p(&buf[7]); 38 case 4: 39 return ldl_be_p(&buf[10]) & 0xffffffffULL; 40 case 5: 41 return ldl_be_p(&buf[6]) & 0xffffffffULL; 42 default: 43 return -1; 44 } 45 } 46 47 uint64_t scsi_cmd_lba(SCSICommand *cmd) 48 { 49 uint8_t *buf = cmd->buf; 50 uint64_t lba; 51 52 switch (buf[0] >> 5) { 53 case 0: 54 lba = ldl_be_p(&buf[0]) & 0x1fffff; 55 break; 56 case 1: 57 case 2: 58 case 5: 59 lba = ldl_be_p(&buf[2]) & 0xffffffffULL; 60 break; 61 case 4: 62 lba = ldq_be_p(&buf[2]); 63 break; 64 default: 65 lba = -1; 66 67 } 68 return lba; 69 } 70 71 int scsi_cdb_length(uint8_t *buf) 72 { 73 int cdb_len; 74 75 switch (buf[0] >> 5) { 76 case 0: 77 cdb_len = 6; 78 break; 79 case 1: 80 case 2: 81 cdb_len = 10; 82 break; 83 case 4: 84 cdb_len = 16; 85 break; 86 case 5: 87 cdb_len = 12; 88 break; 89 default: 90 cdb_len = -1; 91 } 92 return cdb_len; 93 } 94 95 SCSISense scsi_parse_sense_buf(const uint8_t *in_buf, int in_len) 96 { 97 bool fixed_in; 98 SCSISense sense; 99 100 assert(in_len > 0); 101 fixed_in = (in_buf[0] & 2) == 0; 102 if (fixed_in) { 103 if (in_len < 14) { 104 return SENSE_CODE(IO_ERROR); 105 } 106 sense.key = in_buf[2]; 107 sense.asc = in_buf[12]; 108 sense.ascq = in_buf[13]; 109 } else { 110 if (in_len < 4) { 111 return SENSE_CODE(IO_ERROR); 112 } 113 sense.key = in_buf[1]; 114 sense.asc = in_buf[2]; 115 sense.ascq = in_buf[3]; 116 } 117 118 return sense; 119 } 120 121 int scsi_build_sense_buf(uint8_t *out_buf, size_t size, SCSISense sense, 122 bool fixed_sense) 123 { 124 int len; 125 uint8_t buf[SCSI_SENSE_LEN] = { 0 }; 126 127 if (fixed_sense) { 128 buf[0] = 0x70; 129 buf[2] = sense.key; 130 buf[7] = 10; 131 buf[12] = sense.asc; 132 buf[13] = sense.ascq; 133 len = 18; 134 } else { 135 buf[0] = 0x72; 136 buf[1] = sense.key; 137 buf[2] = sense.asc; 138 buf[3] = sense.ascq; 139 len = 8; 140 } 141 len = MIN(len, size); 142 memcpy(out_buf, buf, len); 143 return len; 144 } 145 146 int scsi_build_sense(uint8_t *buf, SCSISense sense) 147 { 148 return scsi_build_sense_buf(buf, SCSI_SENSE_LEN, sense, true); 149 } 150 151 /* 152 * Predefined sense codes 153 */ 154 155 /* No sense data available */ 156 const struct SCSISense sense_code_NO_SENSE = { 157 .key = NO_SENSE , .asc = 0x00 , .ascq = 0x00 158 }; 159 160 /* LUN not ready, Manual intervention required */ 161 const struct SCSISense sense_code_LUN_NOT_READY = { 162 .key = NOT_READY, .asc = 0x04, .ascq = 0x03 163 }; 164 165 /* LUN not ready, Medium not present */ 166 const struct SCSISense sense_code_NO_MEDIUM = { 167 .key = NOT_READY, .asc = 0x3a, .ascq = 0x00 168 }; 169 170 /* LUN not ready, medium removal prevented */ 171 const struct SCSISense sense_code_NOT_READY_REMOVAL_PREVENTED = { 172 .key = NOT_READY, .asc = 0x53, .ascq = 0x02 173 }; 174 175 /* Hardware error, internal target failure */ 176 const struct SCSISense sense_code_TARGET_FAILURE = { 177 .key = HARDWARE_ERROR, .asc = 0x44, .ascq = 0x00 178 }; 179 180 /* Illegal request, invalid command operation code */ 181 const struct SCSISense sense_code_INVALID_OPCODE = { 182 .key = ILLEGAL_REQUEST, .asc = 0x20, .ascq = 0x00 183 }; 184 185 /* Illegal request, LBA out of range */ 186 const struct SCSISense sense_code_LBA_OUT_OF_RANGE = { 187 .key = ILLEGAL_REQUEST, .asc = 0x21, .ascq = 0x00 188 }; 189 190 /* Illegal request, Invalid field in CDB */ 191 const struct SCSISense sense_code_INVALID_FIELD = { 192 .key = ILLEGAL_REQUEST, .asc = 0x24, .ascq = 0x00 193 }; 194 195 /* Illegal request, Invalid field in parameter list */ 196 const struct SCSISense sense_code_INVALID_PARAM = { 197 .key = ILLEGAL_REQUEST, .asc = 0x26, .ascq = 0x00 198 }; 199 200 /* Illegal request, Invalid value in parameter list */ 201 const struct SCSISense sense_code_INVALID_PARAM_VALUE = { 202 .key = ILLEGAL_REQUEST, .asc = 0x26, .ascq = 0x01 203 }; 204 205 /* Illegal request, Parameter list length error */ 206 const struct SCSISense sense_code_INVALID_PARAM_LEN = { 207 .key = ILLEGAL_REQUEST, .asc = 0x1a, .ascq = 0x00 208 }; 209 210 /* Illegal request, LUN not supported */ 211 const struct SCSISense sense_code_LUN_NOT_SUPPORTED = { 212 .key = ILLEGAL_REQUEST, .asc = 0x25, .ascq = 0x00 213 }; 214 215 /* Illegal request, Saving parameters not supported */ 216 const struct SCSISense sense_code_SAVING_PARAMS_NOT_SUPPORTED = { 217 .key = ILLEGAL_REQUEST, .asc = 0x39, .ascq = 0x00 218 }; 219 220 /* Illegal request, Incompatible medium installed */ 221 const struct SCSISense sense_code_INCOMPATIBLE_FORMAT = { 222 .key = ILLEGAL_REQUEST, .asc = 0x30, .ascq = 0x00 223 }; 224 225 /* Illegal request, medium removal prevented */ 226 const struct SCSISense sense_code_ILLEGAL_REQ_REMOVAL_PREVENTED = { 227 .key = ILLEGAL_REQUEST, .asc = 0x53, .ascq = 0x02 228 }; 229 230 /* Illegal request, Invalid Transfer Tag */ 231 const struct SCSISense sense_code_INVALID_TAG = { 232 .key = ILLEGAL_REQUEST, .asc = 0x4b, .ascq = 0x01 233 }; 234 235 /* Command aborted, I/O process terminated */ 236 const struct SCSISense sense_code_IO_ERROR = { 237 .key = ABORTED_COMMAND, .asc = 0x00, .ascq = 0x06 238 }; 239 240 /* Command aborted, I_T Nexus loss occurred */ 241 const struct SCSISense sense_code_I_T_NEXUS_LOSS = { 242 .key = ABORTED_COMMAND, .asc = 0x29, .ascq = 0x07 243 }; 244 245 /* Command aborted, Logical Unit failure */ 246 const struct SCSISense sense_code_LUN_FAILURE = { 247 .key = ABORTED_COMMAND, .asc = 0x3e, .ascq = 0x01 248 }; 249 250 /* Command aborted, Overlapped Commands Attempted */ 251 const struct SCSISense sense_code_OVERLAPPED_COMMANDS = { 252 .key = ABORTED_COMMAND, .asc = 0x4e, .ascq = 0x00 253 }; 254 255 /* Command aborted, LUN Communication Failure */ 256 const struct SCSISense sense_code_LUN_COMM_FAILURE = { 257 .key = ABORTED_COMMAND, .asc = 0x08, .ascq = 0x00 258 }; 259 260 /* Medium Error, Unrecovered read error */ 261 const struct SCSISense sense_code_READ_ERROR = { 262 .key = MEDIUM_ERROR, .asc = 0x11, .ascq = 0x00 263 }; 264 265 /* Not ready, Cause not reportable */ 266 const struct SCSISense sense_code_NOT_READY = { 267 .key = NOT_READY, .asc = 0x04, .ascq = 0x00 268 }; 269 270 /* Unit attention, Capacity data has changed */ 271 const struct SCSISense sense_code_CAPACITY_CHANGED = { 272 .key = UNIT_ATTENTION, .asc = 0x2a, .ascq = 0x09 273 }; 274 275 /* Unit attention, Power on, reset or bus device reset occurred */ 276 const struct SCSISense sense_code_RESET = { 277 .key = UNIT_ATTENTION, .asc = 0x29, .ascq = 0x00 278 }; 279 280 /* Unit attention, SCSI bus reset */ 281 const struct SCSISense sense_code_SCSI_BUS_RESET = { 282 .key = UNIT_ATTENTION, .asc = 0x29, .ascq = 0x02 283 }; 284 285 /* Unit attention, No medium */ 286 const struct SCSISense sense_code_UNIT_ATTENTION_NO_MEDIUM = { 287 .key = UNIT_ATTENTION, .asc = 0x3a, .ascq = 0x00 288 }; 289 290 /* Unit attention, Medium may have changed */ 291 const struct SCSISense sense_code_MEDIUM_CHANGED = { 292 .key = UNIT_ATTENTION, .asc = 0x28, .ascq = 0x00 293 }; 294 295 /* Unit attention, Reported LUNs data has changed */ 296 const struct SCSISense sense_code_REPORTED_LUNS_CHANGED = { 297 .key = UNIT_ATTENTION, .asc = 0x3f, .ascq = 0x0e 298 }; 299 300 /* Unit attention, Device internal reset */ 301 const struct SCSISense sense_code_DEVICE_INTERNAL_RESET = { 302 .key = UNIT_ATTENTION, .asc = 0x29, .ascq = 0x04 303 }; 304 305 /* Data Protection, Write Protected */ 306 const struct SCSISense sense_code_WRITE_PROTECTED = { 307 .key = DATA_PROTECT, .asc = 0x27, .ascq = 0x00 308 }; 309 310 /* Data Protection, Space Allocation Failed Write Protect */ 311 const struct SCSISense sense_code_SPACE_ALLOC_FAILED = { 312 .key = DATA_PROTECT, .asc = 0x27, .ascq = 0x07 313 }; 314 315 /* 316 * scsi_convert_sense 317 * 318 * Convert between fixed and descriptor sense buffers 319 */ 320 int scsi_convert_sense(uint8_t *in_buf, int in_len, 321 uint8_t *buf, int len, bool fixed) 322 { 323 SCSISense sense; 324 bool fixed_in; 325 326 if (in_len == 0) { 327 return scsi_build_sense_buf(buf, len, SENSE_CODE(NO_SENSE), fixed); 328 } 329 330 fixed_in = (in_buf[0] & 2) == 0; 331 if (fixed == fixed_in) { 332 memcpy(buf, in_buf, MIN(len, in_len)); 333 return MIN(len, in_len); 334 } else { 335 sense = scsi_parse_sense_buf(in_buf, in_len); 336 return scsi_build_sense_buf(buf, len, sense, fixed); 337 } 338 } 339 340 static bool scsi_sense_is_guest_recoverable(int key, int asc, int ascq) 341 { 342 switch (key) { 343 case NO_SENSE: 344 case RECOVERED_ERROR: 345 case UNIT_ATTENTION: 346 case ABORTED_COMMAND: 347 return true; 348 case NOT_READY: 349 case ILLEGAL_REQUEST: 350 case DATA_PROTECT: 351 /* Parse ASCQ */ 352 break; 353 default: 354 return false; 355 } 356 357 switch ((asc << 8) | ascq) { 358 case 0x1a00: /* PARAMETER LIST LENGTH ERROR */ 359 case 0x2000: /* INVALID OPERATION CODE */ 360 case 0x2400: /* INVALID FIELD IN CDB */ 361 case 0x2500: /* LOGICAL UNIT NOT SUPPORTED */ 362 case 0x2600: /* INVALID FIELD IN PARAMETER LIST */ 363 364 case 0x2104: /* UNALIGNED WRITE COMMAND */ 365 case 0x2105: /* WRITE BOUNDARY VIOLATION */ 366 case 0x2106: /* ATTEMPT TO READ INVALID DATA */ 367 case 0x550e: /* INSUFFICIENT ZONE RESOURCES */ 368 369 case 0x0401: /* NOT READY, IN PROGRESS OF BECOMING READY */ 370 case 0x0402: /* NOT READY, INITIALIZING COMMAND REQUIRED */ 371 return true; 372 default: 373 return false; 374 } 375 } 376 377 int scsi_sense_to_errno(int key, int asc, int ascq) 378 { 379 switch (key) { 380 case NO_SENSE: 381 case RECOVERED_ERROR: 382 case UNIT_ATTENTION: 383 return EAGAIN; 384 case ABORTED_COMMAND: /* COMMAND ABORTED */ 385 return ECANCELED; 386 case NOT_READY: 387 case ILLEGAL_REQUEST: 388 case DATA_PROTECT: 389 /* Parse ASCQ */ 390 break; 391 default: 392 return EIO; 393 } 394 switch ((asc << 8) | ascq) { 395 case 0x1a00: /* PARAMETER LIST LENGTH ERROR */ 396 case 0x2000: /* INVALID OPERATION CODE */ 397 case 0x2400: /* INVALID FIELD IN CDB */ 398 case 0x2600: /* INVALID FIELD IN PARAMETER LIST */ 399 return EINVAL; 400 case 0x2100: /* LBA OUT OF RANGE */ 401 case 0x2707: /* SPACE ALLOC FAILED */ 402 return ENOSPC; 403 case 0x2500: /* LOGICAL UNIT NOT SUPPORTED */ 404 return ENOTSUP; 405 case 0x3a00: /* MEDIUM NOT PRESENT */ 406 case 0x3a01: /* MEDIUM NOT PRESENT TRAY CLOSED */ 407 case 0x3a02: /* MEDIUM NOT PRESENT TRAY OPEN */ 408 return ENOMEDIUM; 409 case 0x2700: /* WRITE PROTECTED */ 410 return EACCES; 411 case 0x0401: /* NOT READY, IN PROGRESS OF BECOMING READY */ 412 return EINPROGRESS; 413 case 0x0402: /* NOT READY, INITIALIZING COMMAND REQUIRED */ 414 return ENOTCONN; 415 default: 416 return EIO; 417 } 418 } 419 420 int scsi_sense_buf_to_errno(const uint8_t *in_buf, size_t in_len) 421 { 422 SCSISense sense; 423 if (in_len < 1) { 424 return EIO; 425 } 426 427 sense = scsi_parse_sense_buf(in_buf, in_len); 428 return scsi_sense_to_errno(sense.key, sense.asc, sense.ascq); 429 } 430 431 bool scsi_sense_buf_is_guest_recoverable(const uint8_t *in_buf, size_t in_len) 432 { 433 SCSISense sense; 434 if (in_len < 1) { 435 return false; 436 } 437 438 sense = scsi_parse_sense_buf(in_buf, in_len); 439 return scsi_sense_is_guest_recoverable(sense.key, sense.asc, sense.ascq); 440 } 441 442 const char *scsi_command_name(uint8_t cmd) 443 { 444 static const char *names[] = { 445 [ TEST_UNIT_READY ] = "TEST_UNIT_READY", 446 [ REWIND ] = "REWIND", 447 [ REQUEST_SENSE ] = "REQUEST_SENSE", 448 [ FORMAT_UNIT ] = "FORMAT_UNIT", 449 [ READ_BLOCK_LIMITS ] = "READ_BLOCK_LIMITS", 450 [ REASSIGN_BLOCKS ] = "REASSIGN_BLOCKS/INITIALIZE ELEMENT STATUS", 451 /* LOAD_UNLOAD and INITIALIZE_ELEMENT_STATUS use the same operation code */ 452 [ READ_6 ] = "READ_6", 453 [ WRITE_6 ] = "WRITE_6", 454 [ SET_CAPACITY ] = "SET_CAPACITY", 455 [ READ_REVERSE ] = "READ_REVERSE", 456 [ WRITE_FILEMARKS ] = "WRITE_FILEMARKS", 457 [ SPACE ] = "SPACE", 458 [ INQUIRY ] = "INQUIRY", 459 [ RECOVER_BUFFERED_DATA ] = "RECOVER_BUFFERED_DATA", 460 [ MAINTENANCE_IN ] = "MAINTENANCE_IN", 461 [ MAINTENANCE_OUT ] = "MAINTENANCE_OUT", 462 [ MODE_SELECT ] = "MODE_SELECT", 463 [ RESERVE ] = "RESERVE", 464 [ RELEASE ] = "RELEASE", 465 [ COPY ] = "COPY", 466 [ ERASE ] = "ERASE", 467 [ MODE_SENSE ] = "MODE_SENSE", 468 [ START_STOP ] = "START_STOP/LOAD_UNLOAD", 469 /* LOAD_UNLOAD and START_STOP use the same operation code */ 470 [ RECEIVE_DIAGNOSTIC ] = "RECEIVE_DIAGNOSTIC", 471 [ SEND_DIAGNOSTIC ] = "SEND_DIAGNOSTIC", 472 [ ALLOW_MEDIUM_REMOVAL ] = "ALLOW_MEDIUM_REMOVAL", 473 [ READ_CAPACITY_10 ] = "READ_CAPACITY_10", 474 [ READ_10 ] = "READ_10", 475 [ WRITE_10 ] = "WRITE_10", 476 [ SEEK_10 ] = "SEEK_10/POSITION_TO_ELEMENT", 477 /* SEEK_10 and POSITION_TO_ELEMENT use the same operation code */ 478 [ WRITE_VERIFY_10 ] = "WRITE_VERIFY_10", 479 [ VERIFY_10 ] = "VERIFY_10", 480 [ SEARCH_HIGH ] = "SEARCH_HIGH", 481 [ SEARCH_EQUAL ] = "SEARCH_EQUAL", 482 [ SEARCH_LOW ] = "SEARCH_LOW", 483 [ SET_LIMITS ] = "SET_LIMITS", 484 [ PRE_FETCH ] = "PRE_FETCH/READ_POSITION", 485 /* READ_POSITION and PRE_FETCH use the same operation code */ 486 [ SYNCHRONIZE_CACHE ] = "SYNCHRONIZE_CACHE", 487 [ LOCK_UNLOCK_CACHE ] = "LOCK_UNLOCK_CACHE", 488 [ READ_DEFECT_DATA ] = "READ_DEFECT_DATA/INITIALIZE_ELEMENT_STATUS_WITH_RANGE", 489 /* READ_DEFECT_DATA and INITIALIZE_ELEMENT_STATUS_WITH_RANGE use the same operation code */ 490 [ MEDIUM_SCAN ] = "MEDIUM_SCAN", 491 [ COMPARE ] = "COMPARE", 492 [ COPY_VERIFY ] = "COPY_VERIFY", 493 [ WRITE_BUFFER ] = "WRITE_BUFFER", 494 [ READ_BUFFER ] = "READ_BUFFER", 495 [ UPDATE_BLOCK ] = "UPDATE_BLOCK", 496 [ READ_LONG_10 ] = "READ_LONG_10", 497 [ WRITE_LONG_10 ] = "WRITE_LONG_10", 498 [ CHANGE_DEFINITION ] = "CHANGE_DEFINITION", 499 [ WRITE_SAME_10 ] = "WRITE_SAME_10", 500 [ UNMAP ] = "UNMAP", 501 [ READ_TOC ] = "READ_TOC", 502 [ REPORT_DENSITY_SUPPORT ] = "REPORT_DENSITY_SUPPORT", 503 [ SANITIZE ] = "SANITIZE", 504 [ GET_CONFIGURATION ] = "GET_CONFIGURATION", 505 [ LOG_SELECT ] = "LOG_SELECT", 506 [ LOG_SENSE ] = "LOG_SENSE", 507 [ MODE_SELECT_10 ] = "MODE_SELECT_10", 508 [ RESERVE_10 ] = "RESERVE_10", 509 [ RELEASE_10 ] = "RELEASE_10", 510 [ MODE_SENSE_10 ] = "MODE_SENSE_10", 511 [ PERSISTENT_RESERVE_IN ] = "PERSISTENT_RESERVE_IN", 512 [ PERSISTENT_RESERVE_OUT ] = "PERSISTENT_RESERVE_OUT", 513 [ WRITE_FILEMARKS_16 ] = "WRITE_FILEMARKS_16", 514 [ EXTENDED_COPY ] = "EXTENDED_COPY", 515 [ ATA_PASSTHROUGH_16 ] = "ATA_PASSTHROUGH_16", 516 [ ACCESS_CONTROL_IN ] = "ACCESS_CONTROL_IN", 517 [ ACCESS_CONTROL_OUT ] = "ACCESS_CONTROL_OUT", 518 [ READ_16 ] = "READ_16", 519 [ COMPARE_AND_WRITE ] = "COMPARE_AND_WRITE", 520 [ WRITE_16 ] = "WRITE_16", 521 [ WRITE_VERIFY_16 ] = "WRITE_VERIFY_16", 522 [ VERIFY_16 ] = "VERIFY_16", 523 [ PRE_FETCH_16 ] = "PRE_FETCH_16", 524 [ SYNCHRONIZE_CACHE_16 ] = "SPACE_16/SYNCHRONIZE_CACHE_16", 525 /* SPACE_16 and SYNCHRONIZE_CACHE_16 use the same operation code */ 526 [ LOCATE_16 ] = "LOCATE_16", 527 [ WRITE_SAME_16 ] = "ERASE_16/WRITE_SAME_16", 528 /* ERASE_16 and WRITE_SAME_16 use the same operation code */ 529 [ SERVICE_ACTION_IN_16 ] = "SERVICE_ACTION_IN_16", 530 [ WRITE_LONG_16 ] = "WRITE_LONG_16", 531 [ REPORT_LUNS ] = "REPORT_LUNS", 532 [ ATA_PASSTHROUGH_12 ] = "BLANK/ATA_PASSTHROUGH_12", 533 [ MOVE_MEDIUM ] = "MOVE_MEDIUM", 534 [ EXCHANGE_MEDIUM ] = "EXCHANGE MEDIUM", 535 [ READ_12 ] = "READ_12", 536 [ WRITE_12 ] = "WRITE_12", 537 [ ERASE_12 ] = "ERASE_12/GET_PERFORMANCE", 538 /* ERASE_12 and GET_PERFORMANCE use the same operation code */ 539 [ SERVICE_ACTION_IN_12 ] = "SERVICE_ACTION_IN_12", 540 [ WRITE_VERIFY_12 ] = "WRITE_VERIFY_12", 541 [ VERIFY_12 ] = "VERIFY_12", 542 [ SEARCH_HIGH_12 ] = "SEARCH_HIGH_12", 543 [ SEARCH_EQUAL_12 ] = "SEARCH_EQUAL_12", 544 [ SEARCH_LOW_12 ] = "SEARCH_LOW_12", 545 [ READ_ELEMENT_STATUS ] = "READ_ELEMENT_STATUS", 546 [ SEND_VOLUME_TAG ] = "SEND_VOLUME_TAG/SET_STREAMING", 547 /* SEND_VOLUME_TAG and SET_STREAMING use the same operation code */ 548 [ READ_CD ] = "READ_CD", 549 [ READ_DEFECT_DATA_12 ] = "READ_DEFECT_DATA_12", 550 [ READ_DVD_STRUCTURE ] = "READ_DVD_STRUCTURE", 551 [ RESERVE_TRACK ] = "RESERVE_TRACK", 552 [ SEND_CUE_SHEET ] = "SEND_CUE_SHEET", 553 [ SEND_DVD_STRUCTURE ] = "SEND_DVD_STRUCTURE", 554 [ SET_CD_SPEED ] = "SET_CD_SPEED", 555 [ SET_READ_AHEAD ] = "SET_READ_AHEAD", 556 [ ALLOW_OVERWRITE ] = "ALLOW_OVERWRITE", 557 [ MECHANISM_STATUS ] = "MECHANISM_STATUS", 558 [ GET_EVENT_STATUS_NOTIFICATION ] = "GET_EVENT_STATUS_NOTIFICATION", 559 [ READ_DISC_INFORMATION ] = "READ_DISC_INFORMATION", 560 }; 561 562 if (cmd >= ARRAY_SIZE(names) || names[cmd] == NULL) { 563 return "*UNKNOWN*"; 564 } 565 return names[cmd]; 566 } 567 568 int scsi_sense_from_errno(int errno_value, SCSISense *sense) 569 { 570 switch (errno_value) { 571 case 0: 572 return GOOD; 573 case EDOM: 574 return TASK_SET_FULL; 575 #ifdef CONFIG_LINUX 576 /* These errno mapping are specific to Linux. For more information: 577 * - scsi_decide_disposition in drivers/scsi/scsi_error.c 578 * - scsi_result_to_blk_status in drivers/scsi/scsi_lib.c 579 * - blk_errors[] in block/blk-core.c 580 */ 581 case EBADE: 582 return RESERVATION_CONFLICT; 583 case ENODATA: 584 *sense = SENSE_CODE(READ_ERROR); 585 return CHECK_CONDITION; 586 case EREMOTEIO: 587 *sense = SENSE_CODE(LUN_COMM_FAILURE); 588 return CHECK_CONDITION; 589 #endif 590 case ENOMEDIUM: 591 *sense = SENSE_CODE(NO_MEDIUM); 592 return CHECK_CONDITION; 593 case ENOMEM: 594 *sense = SENSE_CODE(TARGET_FAILURE); 595 return CHECK_CONDITION; 596 case EINVAL: 597 *sense = SENSE_CODE(INVALID_FIELD); 598 return CHECK_CONDITION; 599 case ENOSPC: 600 *sense = SENSE_CODE(SPACE_ALLOC_FAILED); 601 return CHECK_CONDITION; 602 default: 603 *sense = SENSE_CODE(IO_ERROR); 604 return CHECK_CONDITION; 605 } 606 } 607 608 #ifdef CONFIG_LINUX 609 int sg_io_sense_from_errno(int errno_value, struct sg_io_hdr *io_hdr, 610 SCSISense *sense) 611 { 612 if (errno_value != 0) { 613 return scsi_sense_from_errno(errno_value, sense); 614 } else { 615 if (io_hdr->host_status == SG_ERR_DID_NO_CONNECT || 616 io_hdr->host_status == SG_ERR_DID_BUS_BUSY || 617 io_hdr->host_status == SG_ERR_DID_TIME_OUT || 618 (io_hdr->driver_status & SG_ERR_DRIVER_TIMEOUT)) { 619 return BUSY; 620 } else if (io_hdr->host_status) { 621 *sense = SENSE_CODE(I_T_NEXUS_LOSS); 622 return CHECK_CONDITION; 623 } else if (io_hdr->status) { 624 return io_hdr->status; 625 } else if (io_hdr->driver_status & SG_ERR_DRIVER_SENSE) { 626 return CHECK_CONDITION; 627 } else { 628 return GOOD; 629 } 630 } 631 } 632 #endif 633