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