Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/cam/cam.c
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1 /*- 2 * Generic utility routines for the Common Access Method layer. 3 * 4 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 5 * 6 * Copyright (c) 1997 Justin T. Gibbs. 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions, and the following disclaimer, 14 * without modification, immediately at the beginning of the file. 15 * 2. The name of the author may not be used to endorse or promote products 16 * derived from this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR 22 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 */ 30 31 #include <sys/cdefs.h> 32 __FBSDID("$FreeBSD: releng/12.0/sys/cam/cam.c 326265 2017-11-27 15:12:43Z pfg $"); 33 34 #include <sys/param.h> 35 #ifdef _KERNEL 36 #include <sys/systm.h> 37 #include <sys/kernel.h> 38 #include <sys/sysctl.h> 39 #else /* _KERNEL */ 40 #include <stdlib.h> 41 #include <stdio.h> 42 #include <string.h> 43 #include <camlib.h> 44 #endif /* _KERNEL */ 45 46 #include <cam/cam.h> 47 #include <cam/cam_ccb.h> 48 #include <cam/scsi/scsi_all.h> 49 #include <cam/scsi/smp_all.h> 50 #include <sys/sbuf.h> 51 52 #ifdef _KERNEL 53 #include <sys/libkern.h> 54 #include <cam/cam_queue.h> 55 #include <cam/cam_xpt.h> 56 57 FEATURE(scbus, "SCSI devices support"); 58 59 #endif 60 61 static int camstatusentrycomp(const void *key, const void *member); 62 63 const struct cam_status_entry cam_status_table[] = { 64 { CAM_REQ_INPROG, "CCB request is in progress" }, 65 { CAM_REQ_CMP, "CCB request completed without error" }, 66 { CAM_REQ_ABORTED, "CCB request aborted by the host" }, 67 { CAM_UA_ABORT, "Unable to abort CCB request" }, 68 { CAM_REQ_CMP_ERR, "CCB request completed with an error" }, 69 { CAM_BUSY, "CAM subsystem is busy" }, 70 { CAM_REQ_INVALID, "CCB request was invalid" }, 71 { CAM_PATH_INVALID, "Supplied Path ID is invalid" }, 72 { CAM_DEV_NOT_THERE, "Device Not Present" }, 73 { CAM_UA_TERMIO, "Unable to terminate I/O CCB request" }, 74 { CAM_SEL_TIMEOUT, "Selection Timeout" }, 75 { CAM_CMD_TIMEOUT, "Command timeout" }, 76 { CAM_SCSI_STATUS_ERROR, "SCSI Status Error" }, 77 { CAM_MSG_REJECT_REC, "Message Reject Reveived" }, 78 { CAM_SCSI_BUS_RESET, "SCSI Bus Reset Sent/Received" }, 79 { CAM_UNCOR_PARITY, "Uncorrectable parity/CRC error" }, 80 { CAM_AUTOSENSE_FAIL, "Auto-Sense Retrieval Failed" }, 81 { CAM_NO_HBA, "No HBA Detected" }, 82 { CAM_DATA_RUN_ERR, "Data Overrun error" }, 83 { CAM_UNEXP_BUSFREE, "Unexpected Bus Free" }, 84 { CAM_SEQUENCE_FAIL, "Target Bus Phase Sequence Failure" }, 85 { CAM_CCB_LEN_ERR, "CCB length supplied is inadequate" }, 86 { CAM_PROVIDE_FAIL, "Unable to provide requested capability" }, 87 { CAM_BDR_SENT, "SCSI BDR Message Sent" }, 88 { CAM_REQ_TERMIO, "CCB request terminated by the host" }, 89 { CAM_UNREC_HBA_ERROR, "Unrecoverable Host Bus Adapter Error" }, 90 { CAM_REQ_TOO_BIG, "The request was too large for this host" }, 91 { CAM_REQUEUE_REQ, "Unconditionally Re-queue Request", }, 92 { CAM_ATA_STATUS_ERROR, "ATA Status Error" }, 93 { CAM_SCSI_IT_NEXUS_LOST,"Initiator/Target Nexus Lost" }, 94 { CAM_SMP_STATUS_ERROR, "SMP Status Error" }, 95 { CAM_IDE, "Initiator Detected Error Message Received" }, 96 { CAM_RESRC_UNAVAIL, "Resource Unavailable" }, 97 { CAM_UNACKED_EVENT, "Unacknowledged Event by Host" }, 98 { CAM_MESSAGE_RECV, "Message Received in Host Target Mode" }, 99 { CAM_INVALID_CDB, "Invalid CDB received in Host Target Mode" }, 100 { CAM_LUN_INVALID, "Invalid Lun" }, 101 { CAM_TID_INVALID, "Invalid Target ID" }, 102 { CAM_FUNC_NOTAVAIL, "Function Not Available" }, 103 { CAM_NO_NEXUS, "Nexus Not Established" }, 104 { CAM_IID_INVALID, "Invalid Initiator ID" }, 105 { CAM_CDB_RECVD, "CDB Received" }, 106 { CAM_LUN_ALRDY_ENA, "LUN Already Enabled for Target Mode" }, 107 { CAM_SCSI_BUSY, "SCSI Bus Busy" }, 108 }; 109 110 #ifdef _KERNEL 111 SYSCTL_NODE(_kern, OID_AUTO, cam, CTLFLAG_RD, 0, "CAM Subsystem"); 112 113 #ifndef CAM_DEFAULT_SORT_IO_QUEUES 114 #define CAM_DEFAULT_SORT_IO_QUEUES 1 115 #endif 116 117 int cam_sort_io_queues = CAM_DEFAULT_SORT_IO_QUEUES; 118 SYSCTL_INT(_kern_cam, OID_AUTO, sort_io_queues, CTLFLAG_RWTUN, 119 &cam_sort_io_queues, 0, "Sort IO queues to try and optimise disk access patterns"); 120 #endif 121 122 void 123 cam_strvis(u_int8_t *dst, const u_int8_t *src, int srclen, int dstlen) 124 { 125 126 /* Trim leading/trailing spaces, nulls. */ 127 while (srclen > 0 && src[0] == ' ') 128 src++, srclen--; 129 while (srclen > 0 130 && (src[srclen-1] == ' ' || src[srclen-1] == '\0')) 131 srclen--; 132 133 while (srclen > 0 && dstlen > 1) { 134 u_int8_t *cur_pos = dst; 135 136 if (*src < 0x20 || *src >= 0x80) { 137 /* SCSI-II Specifies that these should never occur. */ 138 /* non-printable character */ 139 if (dstlen > 4) { 140 *cur_pos++ = '\\'; 141 *cur_pos++ = ((*src & 0300) >> 6) + ''; 142 *cur_pos++ = ((*src & 0070) >> 3) + ''; 143 *cur_pos++ = ((*src & 0007) >> 0) + ''; 144 } else { 145 *cur_pos++ = '?'; 146 } 147 } else { 148 /* normal character */ 149 *cur_pos++ = *src; 150 } 151 src++; 152 srclen--; 153 dstlen -= cur_pos - dst; 154 dst = cur_pos; 155 } 156 *dst = '\0'; 157 } 158 159 void 160 cam_strvis_sbuf(struct sbuf *sb, const u_int8_t *src, int srclen, 161 uint32_t flags) 162 { 163 164 /* Trim leading/trailing spaces, nulls. */ 165 while (srclen > 0 && src[0] == ' ') 166 src++, srclen--; 167 while (srclen > 0 168 && (src[srclen-1] == ' ' || src[srclen-1] == '\0')) 169 srclen--; 170 171 while (srclen > 0) { 172 if (*src < 0x20 || *src >= 0x80) { 173 /* SCSI-II Specifies that these should never occur. */ 174 /* non-printable character */ 175 switch (flags & CAM_STRVIS_FLAG_NONASCII_MASK) { 176 case CAM_STRVIS_FLAG_NONASCII_ESC: 177 sbuf_printf(sb, "\\%c%c%c", 178 ((*src & 0300) >> 6) + '', 179 ((*src & 0070) >> 3) + '', 180 ((*src & 0007) >> 0) + ''); 181 break; 182 case CAM_STRVIS_FLAG_NONASCII_RAW: 183 /* 184 * If we run into a NUL, just transform it 185 * into a space. 186 */ 187 if (*src != 0x00) 188 sbuf_putc(sb, *src); 189 else 190 sbuf_putc(sb, ' '); 191 break; 192 case CAM_STRVIS_FLAG_NONASCII_SPC: 193 sbuf_putc(sb, ' '); 194 break; 195 case CAM_STRVIS_FLAG_NONASCII_TRIM: 196 default: 197 break; 198 } 199 } else { 200 /* normal character */ 201 sbuf_putc(sb, *src); 202 } 203 src++; 204 srclen--; 205 } 206 } 207 208 209 /* 210 * Compare string with pattern, returning 0 on match. 211 * Short pattern matches trailing blanks in name, 212 * Shell globbing rules apply: * matches 0 or more characters, 213 * ? matchces one character, [...] denotes a set to match one char, 214 * [^...] denotes a complimented set to match one character. 215 * Spaces in str used to match anything in the pattern string 216 * but was removed because it's a bug. No current patterns require 217 * it, as far as I know, but it's impossible to know what drives 218 * returned. 219 * 220 * Each '*' generates recursion, so keep the number of * in check. 221 */ 222 int 223 cam_strmatch(const u_int8_t *str, const u_int8_t *pattern, int str_len) 224 { 225 226 while (*pattern != '\0' && str_len > 0) { 227 if (*pattern == '*') { 228 pattern++; 229 if (*pattern == '\0') 230 return (0); 231 do { 232 if (cam_strmatch(str, pattern, str_len) == 0) 233 return (0); 234 str++; 235 str_len--; 236 } while (str_len > 0); 237 return (1); 238 } else if (*pattern == '[') { 239 int negate_range, ok; 240 uint8_t pc = UCHAR_MAX; 241 uint8_t sc; 242 243 ok = 0; 244 sc = *str++; 245 str_len--; 246 pattern++; 247 if ((negate_range = (*pattern == '^')) != 0) 248 pattern++; 249 while ((*pattern != ']') && *pattern != '\0') { 250 if (*pattern == '-') { 251 if (pattern[1] == '\0') /* Bad pattern */ 252 return (1); 253 if (sc >= pc && sc <= pattern[1]) 254 ok = 1; 255 pattern++; 256 } else if (*pattern == sc) 257 ok = 1; 258 pc = *pattern; 259 pattern++; 260 } 261 if (ok == negate_range) 262 return (1); 263 pattern++; 264 } else if (*pattern == '?') { 265 /* 266 * NB: || *str == ' ' of the old code is a bug and was 267 * removed. If you add it back, keep this the last if 268 * before the naked else */ 269 pattern++; 270 str++; 271 str_len--; 272 } else { 273 if (*str != *pattern) 274 return (1); 275 pattern++; 276 str++; 277 str_len--; 278 } 279 } 280 281 /* '*' is allowed to match nothing, so gobble it */ 282 while (*pattern == '*') 283 pattern++; 284 285 if ( *pattern != '\0') { 286 /* Pattern not fully consumed. Not a match */ 287 return (1); 288 } 289 290 /* Eat trailing spaces, which get added by SAT */ 291 while (str_len > 0 && *str == ' ') { 292 str++; 293 str_len--; 294 } 295 296 return (str_len); 297 } 298 299 caddr_t 300 cam_quirkmatch(caddr_t target, caddr_t quirk_table, int num_entries, 301 int entry_size, cam_quirkmatch_t *comp_func) 302 { 303 for (; num_entries > 0; num_entries--, quirk_table += entry_size) { 304 if ((*comp_func)(target, quirk_table) == 0) 305 return (quirk_table); 306 } 307 return (NULL); 308 } 309 310 const struct cam_status_entry* 311 cam_fetch_status_entry(cam_status status) 312 { 313 status &= CAM_STATUS_MASK; 314 return (bsearch(&status, &cam_status_table, 315 nitems(cam_status_table), 316 sizeof(*cam_status_table), 317 camstatusentrycomp)); 318 } 319 320 static int 321 camstatusentrycomp(const void *key, const void *member) 322 { 323 cam_status status; 324 const struct cam_status_entry *table_entry; 325 326 status = *(const cam_status *)key; 327 table_entry = (const struct cam_status_entry *)member; 328 329 return (status - table_entry->status_code); 330 } 331 332 333 #ifdef _KERNEL 334 char * 335 cam_error_string(union ccb *ccb, char *str, int str_len, 336 cam_error_string_flags flags, 337 cam_error_proto_flags proto_flags) 338 #else /* !_KERNEL */ 339 char * 340 cam_error_string(struct cam_device *device, union ccb *ccb, char *str, 341 int str_len, cam_error_string_flags flags, 342 cam_error_proto_flags proto_flags) 343 #endif /* _KERNEL/!_KERNEL */ 344 { 345 char path_str[64]; 346 struct sbuf sb; 347 348 if ((ccb == NULL) 349 || (str == NULL) 350 || (str_len <= 0)) 351 return(NULL); 352 353 if (flags == CAM_ESF_NONE) 354 return(NULL); 355 356 switch (ccb->ccb_h.func_code) { 357 case XPT_ATA_IO: 358 switch (proto_flags & CAM_EPF_LEVEL_MASK) { 359 case CAM_EPF_NONE: 360 break; 361 case CAM_EPF_ALL: 362 case CAM_EPF_NORMAL: 363 proto_flags |= CAM_EAF_PRINT_RESULT; 364 /* FALLTHROUGH */ 365 case CAM_EPF_MINIMAL: 366 proto_flags |= CAM_EAF_PRINT_STATUS; 367 /* FALLTHROUGH */ 368 default: 369 break; 370 } 371 break; 372 case XPT_SCSI_IO: 373 switch (proto_flags & CAM_EPF_LEVEL_MASK) { 374 case CAM_EPF_NONE: 375 break; 376 case CAM_EPF_ALL: 377 case CAM_EPF_NORMAL: 378 proto_flags |= CAM_ESF_PRINT_SENSE; 379 /* FALLTHROUGH */ 380 case CAM_EPF_MINIMAL: 381 proto_flags |= CAM_ESF_PRINT_STATUS; 382 /* FALLTHROUGH */ 383 default: 384 break; 385 } 386 break; 387 case XPT_SMP_IO: 388 switch (proto_flags & CAM_EPF_LEVEL_MASK) { 389 case CAM_EPF_NONE: 390 break; 391 case CAM_EPF_ALL: 392 proto_flags |= CAM_ESMF_PRINT_FULL_CMD; 393 /* FALLTHROUGH */ 394 case CAM_EPF_NORMAL: 395 case CAM_EPF_MINIMAL: 396 proto_flags |= CAM_ESMF_PRINT_STATUS; 397 /* FALLTHROUGH */ 398 default: 399 break; 400 } 401 break; 402 default: 403 break; 404 } 405 #ifdef _KERNEL 406 xpt_path_string(ccb->csio.ccb_h.path, path_str, sizeof(path_str)); 407 #else /* !_KERNEL */ 408 cam_path_string(device, path_str, sizeof(path_str)); 409 #endif /* _KERNEL/!_KERNEL */ 410 411 sbuf_new(&sb, str, str_len, 0); 412 413 if (flags & CAM_ESF_COMMAND) { 414 sbuf_cat(&sb, path_str); 415 switch (ccb->ccb_h.func_code) { 416 case XPT_ATA_IO: 417 ata_command_sbuf(&ccb->ataio, &sb); 418 sbuf_printf(&sb, "\n"); 419 break; 420 case XPT_SCSI_IO: 421 #ifdef _KERNEL 422 scsi_command_string(&ccb->csio, &sb); 423 #else /* !_KERNEL */ 424 scsi_command_string(device, &ccb->csio, &sb); 425 #endif /* _KERNEL/!_KERNEL */ 426 sbuf_printf(&sb, "\n"); 427 break; 428 case XPT_SMP_IO: 429 smp_command_sbuf(&ccb->smpio, &sb, path_str, 79 - 430 strlen(path_str), (proto_flags & 431 CAM_ESMF_PRINT_FULL_CMD) ? 79 : 0); 432 sbuf_printf(&sb, "\n"); 433 break; 434 default: 435 break; 436 } 437 } 438 439 if (flags & CAM_ESF_CAM_STATUS) { 440 cam_status status; 441 const struct cam_status_entry *entry; 442 443 sbuf_cat(&sb, path_str); 444 445 status = ccb->ccb_h.status & CAM_STATUS_MASK; 446 447 entry = cam_fetch_status_entry(status); 448 449 if (entry == NULL) 450 sbuf_printf(&sb, "CAM status: Unknown (%#x)\n", 451 ccb->ccb_h.status); 452 else 453 sbuf_printf(&sb, "CAM status: %s\n", 454 entry->status_text); 455 } 456 457 if (flags & CAM_ESF_PROTO_STATUS) { 458 459 switch (ccb->ccb_h.func_code) { 460 case XPT_ATA_IO: 461 if ((ccb->ccb_h.status & CAM_STATUS_MASK) != 462 CAM_ATA_STATUS_ERROR) 463 break; 464 if (proto_flags & CAM_EAF_PRINT_STATUS) { 465 sbuf_cat(&sb, path_str); 466 ata_status_sbuf(&ccb->ataio, &sb); 467 sbuf_printf(&sb, "\n"); 468 } 469 if (proto_flags & CAM_EAF_PRINT_RESULT) { 470 sbuf_cat(&sb, path_str); 471 sbuf_printf(&sb, "RES: "); 472 ata_res_sbuf(&ccb->ataio.res, &sb); 473 sbuf_printf(&sb, "\n"); 474 } 475 476 break; 477 case XPT_SCSI_IO: 478 if ((ccb->ccb_h.status & CAM_STATUS_MASK) != 479 CAM_SCSI_STATUS_ERROR) 480 break; 481 482 if (proto_flags & CAM_ESF_PRINT_STATUS) { 483 sbuf_cat(&sb, path_str); 484 sbuf_printf(&sb, "SCSI status: %s\n", 485 scsi_status_string(&ccb->csio)); 486 } 487 488 if ((proto_flags & CAM_ESF_PRINT_SENSE) 489 && (ccb->csio.scsi_status == SCSI_STATUS_CHECK_COND) 490 && (ccb->ccb_h.status & CAM_AUTOSNS_VALID)) { 491 492 #ifdef _KERNEL 493 scsi_sense_sbuf(&ccb->csio, &sb, 494 SSS_FLAG_NONE); 495 #else /* !_KERNEL */ 496 scsi_sense_sbuf(device, &ccb->csio, &sb, 497 SSS_FLAG_NONE); 498 #endif /* _KERNEL/!_KERNEL */ 499 } 500 break; 501 case XPT_SMP_IO: 502 if ((ccb->ccb_h.status & CAM_STATUS_MASK) != 503 CAM_SMP_STATUS_ERROR) 504 break; 505 506 if (proto_flags & CAM_ESF_PRINT_STATUS) { 507 sbuf_cat(&sb, path_str); 508 sbuf_printf(&sb, "SMP status: %s (%#x)\n", 509 smp_error_desc(ccb->smpio.smp_response[2]), 510 ccb->smpio.smp_response[2]); 511 } 512 /* There is no SMP equivalent to SCSI sense. */ 513 break; 514 default: 515 break; 516 } 517 } 518 519 sbuf_finish(&sb); 520 521 return(sbuf_data(&sb)); 522 } 523 524 #ifdef _KERNEL 525 526 void 527 cam_error_print(union ccb *ccb, cam_error_string_flags flags, 528 cam_error_proto_flags proto_flags) 529 { 530 char str[512]; 531 532 printf("%s", cam_error_string(ccb, str, sizeof(str), flags, 533 proto_flags)); 534 } 535 536 #else /* !_KERNEL */ 537 538 void 539 cam_error_print(struct cam_device *device, union ccb *ccb, 540 cam_error_string_flags flags, cam_error_proto_flags proto_flags, 541 FILE *ofile) 542 { 543 char str[512]; 544 545 if ((device == NULL) || (ccb == NULL) || (ofile == NULL)) 546 return; 547 548 fprintf(ofile, "%s", cam_error_string(device, ccb, str, sizeof(str), 549 flags, proto_flags)); 550 } 551 552 #endif /* _KERNEL/!_KERNEL */ 553 554 /* 555 * Common calculate geometry fuction 556 * 557 * Caller should set ccg->volume_size and block_size. 558 * The extended parameter should be zero if extended translation 559 * should not be used. 560 */ 561 void 562 cam_calc_geometry(struct ccb_calc_geometry *ccg, int extended) 563 { 564 uint32_t size_mb, secs_per_cylinder; 565 566 if (ccg->block_size == 0) { 567 ccg->ccb_h.status = CAM_REQ_CMP_ERR; 568 return; 569 } 570 size_mb = (1024L * 1024L) / ccg->block_size; 571 if (size_mb == 0) { 572 ccg->ccb_h.status = CAM_REQ_CMP_ERR; 573 return; 574 } 575 size_mb = ccg->volume_size / size_mb; 576 if (size_mb > 1024 && extended) { 577 ccg->heads = 255; 578 ccg->secs_per_track = 63; 579 } else { 580 ccg->heads = 64; 581 ccg->secs_per_track = 32; 582 } 583 secs_per_cylinder = ccg->heads * ccg->secs_per_track; 584 if (secs_per_cylinder == 0) { 585 ccg->ccb_h.status = CAM_REQ_CMP_ERR; 586 return; 587 } 588 ccg->cylinders = ccg->volume_size / secs_per_cylinder; 589 ccg->ccb_h.status = CAM_REQ_CMP; 590 }
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