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