1 /* 2 * Copyright (c) 1997, 1998, 1999, 2002 Kenneth D. Merry. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. The name of the author may not be used to endorse or promote products 11 * derived from this software without specific prior written permission. 12 * 13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 14 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 16 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 17 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 18 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 19 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 20 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 21 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 22 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 23 * SUCH DAMAGE. 24 * 25 * $FreeBSD: src/lib/libcam/camlib.c,v 1.8.2.2 2002/05/23 04:19:22 ken Exp $ 26 */ 27 28 #include <sys/types.h> 29 #include <sys/param.h> 30 #include <stdio.h> 31 #include <stdlib.h> 32 #include <string.h> 33 #include <fcntl.h> 34 #include <unistd.h> 35 #include <errno.h> 36 #include <ctype.h> 37 38 #include <cam/cam.h> 39 #include <cam/scsi/scsi_all.h> 40 #include <cam/cam_ccb.h> 41 #include <cam/scsi/scsi_pass.h> 42 #include "camlib.h" 43 44 struct cam_devequiv { 45 char *given_dev; 46 char *real_dev; 47 }; 48 49 struct cam_devequiv devmatchtable[] = { 50 {"sd", "da"}, 51 {"st", "sa"} 52 }; 53 54 char cam_errbuf[CAM_ERRBUF_SIZE]; 55 56 static struct cam_device *cam_real_open_device(const char *path, int flags, 57 struct cam_device *device, 58 const char *given_path, 59 const char *given_dev_name, 60 int given_unit_number); 61 static struct cam_device *cam_lookup_pass(const char *dev_name, int unit, 62 int flags, const char *given_path, 63 struct cam_device *device); 64 65 /* 66 * Send a ccb to a passthrough device. 67 */ 68 int 69 cam_send_ccb(struct cam_device *device, union ccb *ccb) 70 { 71 return(ioctl(device->fd, CAMIOCOMMAND, ccb)); 72 } 73 74 /* 75 * Malloc a CCB, zero out the header and set its path, target and lun ids. 76 */ 77 union ccb * 78 cam_getccb(struct cam_device *dev) 79 { 80 union ccb *ccb; 81 82 ccb = (union ccb *)malloc(sizeof(union ccb)); 83 if (ccb != NULL) { 84 bzero(&ccb->ccb_h, sizeof(struct ccb_hdr)); 85 ccb->ccb_h.path_id = dev->path_id; 86 ccb->ccb_h.target_id = dev->target_id; 87 ccb->ccb_h.target_lun = dev->target_lun; 88 } 89 90 return(ccb); 91 } 92 93 /* 94 * Free a CCB. 95 */ 96 void 97 cam_freeccb(union ccb *ccb) 98 { 99 if (ccb != NULL) 100 free(ccb); 101 } 102 103 /* 104 * Take a device name or path passed in by the user, and attempt to figure 105 * out the device name and unit number. Some possible device name formats are: 106 * /dev/foo0a 107 * /dev/rfoo0a 108 * /dev/rfoos2c 109 * foo0 110 * foo0a 111 * rfoo0 112 * rfoo0a 113 * nrfoo0 114 * 115 * If the caller passes in an old style device name like 'sd' or 'st', 116 * it will be converted to the new style device name based upon devmatchtable 117 * above. 118 * 119 * Input parameters: device name/path, length of devname string 120 * Output: device name, unit number 121 * Return values: returns 0 for success, -1 for failure 122 */ 123 int 124 cam_get_device(const char *path, char *dev_name, int devnamelen, int *unit) 125 { 126 char *func_name = "cam_get_device"; 127 char *tmpstr, *tmpstr2; 128 char *newpath; 129 int unit_offset; 130 int i, found = 0; 131 132 133 if (path == NULL) { 134 sprintf(cam_errbuf, "%s: device pathname was NULL", func_name); 135 return(-1); 136 } 137 138 /* 139 * We can be rather destructive to the path string. Make a copy of 140 * it so we don't hose the user's string. 141 */ 142 newpath = (char *)strdup(path); 143 tmpstr = newpath; 144 145 /* Get rid of any leading white space */ 146 while (isspace(*tmpstr) && (*tmpstr != '\0')) 147 tmpstr++; 148 149 /* 150 * Check to see whether we have an absolute pathname. 151 */ 152 if (*tmpstr == '/') { 153 tmpstr2 = tmpstr; 154 tmpstr = (char *)rindex(tmpstr2, '/'); 155 if ((tmpstr != NULL) && (*tmpstr != '\0')) 156 tmpstr++; 157 } 158 159 if (*tmpstr == '\0') { 160 sprintf(cam_errbuf, "%s: no text after slash", func_name); 161 free(newpath); 162 return(-1); 163 } 164 165 /* 166 * Check to see whether the user has given us a nonrewound tape 167 * device. 168 */ 169 if (*tmpstr == 'n') 170 tmpstr++; 171 172 if (*tmpstr == '\0') { 173 sprintf(cam_errbuf, "%s: no text after leading 'n'", func_name); 174 free(newpath); 175 return(-1); 176 } 177 178 /* 179 * See if the user has given us a character device. 180 */ 181 if (*tmpstr == 'r') 182 tmpstr++; 183 184 if (*tmpstr == '\0') { 185 sprintf(cam_errbuf, "%s: no text after leading 'r'", func_name); 186 free(newpath); 187 return(-1); 188 } 189 190 /* 191 * Try to get rid of any trailing white space or partition letters. 192 */ 193 tmpstr2 = &tmpstr[strlen(tmpstr) - 1]; 194 195 while ((*tmpstr2 != '\0') && (tmpstr2 > tmpstr) &&(!isdigit(*tmpstr2))){ 196 *tmpstr2 = '\0'; 197 tmpstr2--; 198 } 199 200 /* 201 * Check to see whether we have been given a partition with a slice 202 * name. If so, get rid of the slice name/number. 203 */ 204 if (strlen(tmpstr) > 3) { 205 /* 206 * Basically, we're looking for a string that ends in the 207 * following general manner: 1s1 -- a number, the letter 208 * s, and then another number. This indicates that the 209 * user has given us a slice. We substitute nulls for the 210 * s and the slice number. 211 */ 212 if ((isdigit(tmpstr[strlen(tmpstr) - 1])) 213 && (tmpstr[strlen(tmpstr) - 2] == 's') 214 && (isdigit(tmpstr[strlen(tmpstr) - 3]))) { 215 tmpstr[strlen(tmpstr) - 1] = '\0'; 216 tmpstr[strlen(tmpstr) - 1] = '\0'; 217 } 218 } 219 220 /* 221 * After we nuke off the slice, we should have just a device name 222 * and unit number. That means there must be at least 2 223 * characters. If we only have 1, we don't have a valid device name. 224 */ 225 if (strlen(tmpstr) < 2) { 226 sprintf(cam_errbuf, 227 "%s: must have both device name and unit number", 228 func_name); 229 free(newpath); 230 return(-1); 231 } 232 233 /* 234 * If the first character of the string is a digit, then the user 235 * has probably given us all numbers. Point out the error. 236 */ 237 if (isdigit(*tmpstr)) { 238 sprintf(cam_errbuf, 239 "%s: device name cannot begin with a number", 240 func_name); 241 free(newpath); 242 return(-1); 243 } 244 245 /* 246 * At this point, if the last character of the string isn't a 247 * number, we know the user either didn't give us a device number, 248 * or he gave us a device name/number format we don't recognize. 249 */ 250 if (!isdigit(tmpstr[strlen(tmpstr) - 1])) { 251 sprintf(cam_errbuf, "%s: unable to find device unit number", 252 func_name); 253 free(newpath); 254 return(-1); 255 } 256 257 /* 258 * Attempt to figure out where the device name ends and the unit 259 * number begins. As long as unit_offset is at least 1 less than 260 * the length of the string, we can still potentially have a device 261 * name at the front of the string. When we get to something that 262 * isn't a digit, we've hit the device name. Because of the check 263 * above, we know that this cannot happen when unit_offset == 1. 264 * Therefore it is okay to decrement unit_offset -- it won't cause 265 * us to go past the end of the character array. 266 */ 267 for (unit_offset = 1; 268 (unit_offset < (strlen(tmpstr))) 269 && (isdigit(tmpstr[strlen(tmpstr) - unit_offset])); unit_offset++); 270 271 unit_offset--; 272 273 /* 274 * Grab the unit number. 275 */ 276 *unit = atoi(&tmpstr[strlen(tmpstr) - unit_offset]); 277 278 /* 279 * Put a null in place of the first number of the unit number so 280 * that all we have left is the device name. 281 */ 282 tmpstr[strlen(tmpstr) - unit_offset] = '\0'; 283 284 /* 285 * Look through our equivalency table and see if the device name 286 * the user gave us is an old style device name. If so, translate 287 * it to the new style device name. 288 */ 289 for (i = 0;i < (sizeof(devmatchtable)/sizeof(struct cam_devequiv));i++){ 290 if (strcmp(tmpstr, devmatchtable[i].given_dev) == 0) { 291 strlcpy(dev_name,devmatchtable[i].real_dev, devnamelen); 292 found = 1; 293 break; 294 } 295 } 296 if (found == 0) 297 strlcpy(dev_name, tmpstr, devnamelen); 298 299 /* Clean up allocated memory */ 300 free(newpath); 301 302 return(0); 303 304 } 305 306 /* 307 * Backwards compatible wrapper for the real open routine. This translates 308 * a pathname into a device name and unit number for use with the real open 309 * routine. 310 */ 311 struct cam_device * 312 cam_open_device(const char *path, int flags) 313 { 314 int unit; 315 char dev_name[DEV_IDLEN + 1]; 316 317 /* 318 * cam_get_device() has already put an error message in cam_errbuf, 319 * so we don't need to. 320 */ 321 if (cam_get_device(path, dev_name, sizeof(dev_name), &unit) == -1) 322 return(NULL); 323 324 return(cam_lookup_pass(dev_name, unit, flags, path, NULL)); 325 } 326 327 /* 328 * Open the passthrough device for a given bus, target and lun, if the 329 * passthrough device exists. 330 */ 331 struct cam_device * 332 cam_open_btl(path_id_t path_id, target_id_t target_id, lun_id_t target_lun, 333 int flags, struct cam_device *device) 334 { 335 union ccb ccb; 336 struct periph_match_pattern *match_pat; 337 char *func_name = "cam_open_btl"; 338 int fd, bufsize; 339 340 if ((fd = open(XPT_DEVICE, O_RDWR)) < 0) { 341 snprintf(cam_errbuf, CAM_ERRBUF_SIZE, 342 "%s: couldn't open %s\n%s: %s", func_name, XPT_DEVICE, 343 func_name, strerror(errno)); 344 return(NULL); 345 } 346 347 bzero(&ccb, sizeof(union ccb)); 348 ccb.ccb_h.func_code = XPT_DEV_MATCH; 349 350 /* Setup the result buffer */ 351 bufsize = sizeof(struct dev_match_result); 352 ccb.cdm.match_buf_len = bufsize; 353 ccb.cdm.matches = (struct dev_match_result *)malloc(bufsize); 354 if (ccb.cdm.matches == NULL) { 355 snprintf(cam_errbuf, CAM_ERRBUF_SIZE, 356 "%s: couldn't malloc match buffer", func_name); 357 close(fd); 358 return(NULL); 359 } 360 ccb.cdm.num_matches = 0; 361 362 /* Setup the pattern buffer */ 363 ccb.cdm.num_patterns = 1; 364 ccb.cdm.pattern_buf_len = sizeof(struct dev_match_pattern); 365 ccb.cdm.patterns = (struct dev_match_pattern *)malloc( 366 sizeof(struct dev_match_pattern)); 367 if (ccb.cdm.patterns == NULL) { 368 snprintf(cam_errbuf, CAM_ERRBUF_SIZE, 369 "%s: couldn't malloc pattern buffer", func_name); 370 free(ccb.cdm.matches); 371 close(fd); 372 return(NULL); 373 } 374 ccb.cdm.patterns[0].type = DEV_MATCH_PERIPH; 375 match_pat = &ccb.cdm.patterns[0].pattern.periph_pattern; 376 377 /* 378 * We're looking for the passthrough device associated with this 379 * particular bus/target/lun. 380 */ 381 sprintf(match_pat->periph_name, "pass"); 382 match_pat->path_id = path_id; 383 match_pat->target_id = target_id; 384 match_pat->target_lun = target_lun; 385 /* Now set the flags to indicate what we're looking for. */ 386 match_pat->flags = PERIPH_MATCH_PATH | PERIPH_MATCH_TARGET | 387 PERIPH_MATCH_LUN | PERIPH_MATCH_NAME; 388 389 if (ioctl(fd, CAMIOCOMMAND, &ccb) == -1) { 390 sprintf(cam_errbuf, "%s: CAMIOCOMMAND ioctl failed\n" 391 "%s: %s", func_name, func_name, strerror(errno)); 392 goto btl_bailout; 393 } 394 395 /* 396 * Check for an outright error. 397 */ 398 if ((ccb.ccb_h.status != CAM_REQ_CMP) 399 || ((ccb.cdm.status != CAM_DEV_MATCH_LAST) 400 && (ccb.cdm.status != CAM_DEV_MATCH_MORE))) { 401 sprintf(cam_errbuf, "%s: CAM error %#x, CDM error %d " 402 "returned from XPT_DEV_MATCH ccb", func_name, 403 ccb.ccb_h.status, ccb.cdm.status); 404 goto btl_bailout; 405 } 406 407 if (ccb.cdm.status == CAM_DEV_MATCH_MORE) { 408 sprintf(cam_errbuf, "%s: CDM reported more than one" 409 " passthrough device at %d:%d:%d!!\n", 410 func_name, path_id, target_id, target_lun); 411 goto btl_bailout; 412 } 413 414 if (ccb.cdm.num_matches == 0) { 415 sprintf(cam_errbuf, "%s: no passthrough device found at" 416 " %d:%d:%d", func_name, path_id, target_id, 417 target_lun); 418 goto btl_bailout; 419 } 420 421 switch(ccb.cdm.matches[0].type) { 422 case DEV_MATCH_PERIPH: { 423 int pass_unit; 424 char dev_path[256]; 425 struct periph_match_result *periph_result; 426 427 periph_result = &ccb.cdm.matches[0].result.periph_result; 428 pass_unit = periph_result->unit_number; 429 free(ccb.cdm.matches); 430 free(ccb.cdm.patterns); 431 close(fd); 432 sprintf(dev_path, "/dev/pass%d", pass_unit); 433 return(cam_real_open_device(dev_path, flags, device, NULL, 434 NULL, 0)); 435 break; /* NOTREACHED */ 436 } 437 default: 438 sprintf(cam_errbuf, "%s: asked for a peripheral match, but" 439 " got a bus or device match??!!", func_name); 440 goto btl_bailout; 441 break; /* NOTREACHED */ 442 } 443 444 btl_bailout: 445 free(ccb.cdm.matches); 446 free(ccb.cdm.patterns); 447 close(fd); 448 return(NULL); 449 } 450 451 struct cam_device * 452 cam_open_spec_device(const char *dev_name, int unit, int flags, 453 struct cam_device *device) 454 { 455 return(cam_lookup_pass(dev_name, unit, flags, NULL, device)); 456 } 457 458 struct cam_device * 459 cam_open_pass(const char *path, int flags, struct cam_device *device) 460 { 461 return(cam_real_open_device(path, flags, device, path, NULL, 0)); 462 } 463 464 static struct cam_device * 465 cam_lookup_pass(const char *dev_name, int unit, int flags, 466 const char *given_path, struct cam_device *device) 467 { 468 int fd; 469 union ccb ccb; 470 char dev_path[256]; 471 char *func_name = "cam_lookup_pass"; 472 473 /* 474 * The flags argument above only applies to the actual passthrough 475 * device open, not our open of the given device to find the 476 * passthrough device. 477 */ 478 if ((fd = open(XPT_DEVICE, O_RDWR)) < 0) { 479 snprintf(cam_errbuf, CAM_ERRBUF_SIZE, 480 "%s: couldn't open %s\n%s: %s", func_name, XPT_DEVICE, 481 func_name, strerror(errno)); 482 return(NULL); 483 } 484 485 /* This isn't strictly necessary for the GETPASSTHRU ioctl. */ 486 ccb.ccb_h.func_code = XPT_GDEVLIST; 487 488 /* These two are necessary for the GETPASSTHRU ioctl to work. */ 489 strlcpy(ccb.cgdl.periph_name, dev_name, sizeof(ccb.cgdl.periph_name)); 490 ccb.cgdl.unit_number = unit; 491 492 /* 493 * Attempt to get the passthrough device. This ioctl will fail if 494 * the device name is null, if the device doesn't exist, or if the 495 * passthrough driver isn't in the kernel. 496 */ 497 if (ioctl(fd, CAMGETPASSTHRU, &ccb) == -1) { 498 char tmpstr[256]; 499 500 /* 501 * If we get ENOENT from the transport layer version of 502 * the CAMGETPASSTHRU ioctl, it means one of two things: 503 * either the device name/unit number passed in doesn't 504 * exist, or the passthrough driver isn't in the kernel. 505 */ 506 if (errno == ENOENT) { 507 snprintf(tmpstr, sizeof(tmpstr), 508 "\n%s: either the pass driver isn't in " 509 "your kernel\n%s: or %s%d doesn't exist", 510 func_name, func_name, dev_name, unit); 511 } 512 snprintf(cam_errbuf, sizeof(cam_errbuf), 513 "%s: CAMGETPASSTHRU ioctl failed\n" 514 "%s: %s%s", func_name, func_name, strerror(errno), 515 (errno == ENOENT) ? tmpstr : ""); 516 517 return(NULL); 518 } 519 520 close(fd); 521 522 /* 523 * If the ioctl returned the right status, but we got an error back 524 * in the ccb, that means that the kernel found the device the user 525 * passed in, but was unable to find the passthrough device for 526 * the device the user gave us. 527 */ 528 if (ccb.cgdl.status == CAM_GDEVLIST_ERROR) { 529 sprintf(cam_errbuf, "%s: device %s%d does not exist", 530 func_name, dev_name, unit); 531 return(NULL); 532 } 533 534 sprintf(dev_path, "/dev/%s%d", ccb.cgdl.periph_name, 535 ccb.cgdl.unit_number); 536 537 return(cam_real_open_device(dev_path, flags, device, NULL, 538 dev_name, unit)); 539 } 540 541 /* 542 * Open a given device. The path argument isn't strictly necessary, but it 543 * is copied into the cam_device structure as a convenience to the user. 544 */ 545 static struct cam_device * 546 cam_real_open_device(const char *path, int flags, struct cam_device *device, 547 const char *given_path, const char *given_dev_name, 548 int given_unit_number) 549 { 550 char *func_name = "cam_real_open_device"; 551 union ccb ccb; 552 int fd = -1, malloced_device = 0; 553 554 /* 555 * See if the user wants us to malloc a device for him. 556 */ 557 if (device == NULL) { 558 if ((device = (struct cam_device *)malloc( 559 sizeof(struct cam_device))) == NULL) { 560 sprintf(cam_errbuf, "%s: device structure malloc" 561 " failed\n%s: %s", func_name, func_name, 562 strerror(errno)); 563 return(NULL); 564 } 565 device->fd = -1; 566 malloced_device = 1; 567 } 568 569 /* 570 * If the user passed in a path, save it for him. 571 */ 572 if (given_path != NULL) 573 strlcpy(device->device_path, given_path, 574 sizeof(device->device_path)); 575 else 576 device->device_path[0] = '\0'; 577 578 /* 579 * If the user passed in a device name and unit number pair, save 580 * those as well. 581 */ 582 if (given_dev_name != NULL) 583 strlcpy(device->given_dev_name, given_dev_name, 584 sizeof(device->given_dev_name)); 585 else 586 device->given_dev_name[0] = '\0'; 587 device->given_unit_number = given_unit_number; 588 589 if ((fd = open(path, flags)) < 0) { 590 snprintf(cam_errbuf, CAM_ERRBUF_SIZE, 591 "%s: couldn't open passthrough device %s\n" 592 "%s: %s", func_name, path, func_name, 593 strerror(errno)); 594 goto crod_bailout; 595 } 596 597 device->fd = fd; 598 599 bzero(&ccb, sizeof(union ccb)); 600 601 /* 602 * Unlike the transport layer version of the GETPASSTHRU ioctl, 603 * we don't have to set any fields. 604 */ 605 ccb.ccb_h.func_code = XPT_GDEVLIST; 606 607 /* 608 * We're only doing this to get some information on the device in 609 * question. Otherwise, we'd have to pass in yet another 610 * parameter: the passthrough driver unit number. 611 */ 612 if (ioctl(fd, CAMGETPASSTHRU, &ccb) == -1) { 613 /* 614 * At this point we know the passthrough device must exist 615 * because we just opened it above. The only way this 616 * ioctl can fail is if the ccb size is wrong. 617 */ 618 sprintf(cam_errbuf, "%s: CAMGETPASSTHRU ioctl failed\n" 619 "%s: %s", func_name, func_name, strerror(errno)); 620 goto crod_bailout; 621 } 622 623 /* 624 * If the ioctl returned the right status, but we got an error back 625 * in the ccb, that means that the kernel found the device the user 626 * passed in, but was unable to find the passthrough device for 627 * the device the user gave us. 628 */ 629 if (ccb.cgdl.status == CAM_GDEVLIST_ERROR) { 630 sprintf(cam_errbuf, "%s: passthrough device does not exist??!!", 631 func_name); 632 goto crod_bailout; 633 } 634 635 device->dev_unit_num = ccb.cgdl.unit_number; 636 strlcpy(device->device_name, ccb.cgdl.periph_name, 637 sizeof(device->device_name)); 638 device->path_id = ccb.ccb_h.path_id; 639 device->target_id = ccb.ccb_h.target_id; 640 device->target_lun = ccb.ccb_h.target_lun; 641 642 ccb.ccb_h.func_code = XPT_PATH_INQ; 643 if (ioctl(fd, CAMIOCOMMAND, &ccb) == -1) { 644 sprintf(cam_errbuf, "%s: Path Inquiry CCB failed\n" 645 "%s: %s", func_name, func_name, strerror(errno)); 646 goto crod_bailout; 647 } 648 strlcpy(device->sim_name, ccb.cpi.dev_name, sizeof(device->sim_name)); 649 device->sim_unit_number = ccb.cpi.unit_number; 650 device->bus_id = ccb.cpi.bus_id; 651 652 /* 653 * It doesn't really matter what is in the payload for a getdev 654 * CCB, the kernel doesn't look at it. 655 */ 656 ccb.ccb_h.func_code = XPT_GDEV_TYPE; 657 if (ioctl(fd, CAMIOCOMMAND, &ccb) == -1) { 658 sprintf(cam_errbuf, "%s: Get Device Type CCB failed\n" 659 "%s: %s", func_name, func_name, strerror(errno)); 660 goto crod_bailout; 661 } 662 device->pd_type = SID_TYPE(&ccb.cgd.inq_data); 663 bcopy(&ccb.cgd.inq_data, &device->inq_data, 664 sizeof(struct scsi_inquiry_data)); 665 device->serial_num_len = ccb.cgd.serial_num_len; 666 bcopy(&ccb.cgd.serial_num, &device->serial_num, device->serial_num_len); 667 668 /* 669 * Zero the payload, the kernel does look at the flags. 670 */ 671 bzero(&(&ccb.ccb_h)[1], sizeof(struct ccb_trans_settings)); 672 673 /* 674 * Get transfer settings for this device. 675 */ 676 ccb.ccb_h.func_code = XPT_GET_TRAN_SETTINGS; 677 678 ccb.cts.flags = CCB_TRANS_CURRENT_SETTINGS; 679 680 if (ioctl(fd, CAMIOCOMMAND, &ccb) == -1) { 681 sprintf(cam_errbuf, "%s: Get Transfer Settings CCB failed\n" 682 "%s: %s", func_name, func_name, strerror(errno)); 683 goto crod_bailout; 684 } 685 device->sync_period = ccb.cts.sync_period; 686 device->sync_offset = ccb.cts.sync_offset; 687 device->bus_width = ccb.cts.bus_width; 688 689 return(device); 690 691 crod_bailout: 692 693 if (fd >= 0) 694 close(fd); 695 696 if (malloced_device) 697 free(device); 698 699 return(NULL); 700 } 701 702 void 703 cam_close_device(struct cam_device *dev) 704 { 705 if (dev == NULL) 706 return; 707 708 cam_close_spec_device(dev); 709 710 if (dev != NULL) 711 free(dev); 712 } 713 714 void 715 cam_close_spec_device(struct cam_device *dev) 716 { 717 if (dev == NULL) 718 return; 719 720 if (dev->fd >= 0) 721 close(dev->fd); 722 } 723 724 char * 725 cam_path_string(struct cam_device *dev, char *str, int len) 726 { 727 if (dev == NULL) { 728 snprintf(str, len, "No path"); 729 return(str); 730 } 731 732 snprintf(str, len, "(%s%d:%s%d:%d:%d:%d): ", 733 (dev->device_name[0] != '\0') ? dev->device_name : "pass", 734 dev->dev_unit_num, 735 (dev->sim_name[0] != '\0') ? dev->sim_name : "unknown", 736 dev->sim_unit_number, 737 dev->bus_id, 738 dev->target_id, 739 dev->target_lun); 740 741 return(str); 742 } 743 744 /* 745 * Malloc/duplicate a CAM device structure. 746 */ 747 struct cam_device * 748 cam_device_dup(struct cam_device *device) 749 { 750 char *func_name = "cam_device_dup"; 751 struct cam_device *newdev; 752 753 if (device == NULL) { 754 sprintf(cam_errbuf, "%s: device is NULL", func_name); 755 return(NULL); 756 } 757 758 newdev = malloc(sizeof(struct cam_device)); 759 760 bcopy(device, newdev, sizeof(struct cam_device)); 761 762 return(newdev); 763 } 764 765 /* 766 * Copy a CAM device structure. 767 */ 768 void 769 cam_device_copy(struct cam_device *src, struct cam_device *dst) 770 { 771 char *func_name = "cam_device_copy"; 772 773 if (src == NULL) { 774 sprintf(cam_errbuf, "%s: source device struct was NULL", 775 func_name); 776 return; 777 } 778 779 if (dst == NULL) { 780 sprintf(cam_errbuf, "%s: destination device struct was NULL", 781 func_name); 782 return; 783 } 784 785 bcopy(src, dst, sizeof(struct cam_device)); 786 787 } 788