1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 /* 22 * Copyright 2009 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 #include <fcntl.h> 27 #include <libdevinfo.h> 28 #include <stdio.h> 29 #include <sys/sunddi.h> 30 #include <sys/types.h> 31 #include <unistd.h> 32 #include <stdlib.h> 33 #include <string.h> 34 #include <libintl.h> 35 #include <locale.h> 36 #include <sys/debug.h> 37 #include <strings.h> 38 #include <sys/stat.h> 39 #include <sys/swap.h> 40 41 #include "libdiskmgt.h" 42 #include "disks_private.h" 43 #include "partition.h" 44 45 #define ANY_ZPOOL_USE(who) \ 46 (((who) == DM_WHO_ZPOOL_FORCE) || \ 47 ((who) == DM_WHO_ZPOOL) || \ 48 ((who) == DM_WHO_ZPOOL_SPARE)) 49 50 extern char *getfullblkname(); 51 52 extern dm_desc_type_t drive_assoc_types[]; 53 extern dm_desc_type_t bus_assoc_types[]; 54 extern dm_desc_type_t controller_assoc_types[]; 55 extern dm_desc_type_t media_assoc_types[]; 56 extern dm_desc_type_t slice_assoc_types[]; 57 extern dm_desc_type_t partition_assoc_types[]; 58 extern dm_desc_type_t path_assoc_types[]; 59 extern dm_desc_type_t alias_assoc_types[]; 60 61 62 static dm_descriptor_t *ptr_array_to_desc_array(descriptor_t **ptrs, int *errp); 63 static descriptor_t **desc_array_to_ptr_array(dm_descriptor_t *da, int *errp); 64 static int build_usage_string(char *dname, char *by, char *data, char **use, 65 int *found, int *errp); 66 67 void 68 dm_free_descriptor(dm_descriptor_t desc) 69 { 70 descriptor_t *dp; 71 72 if (desc == 0) { 73 return; 74 } 75 dp = (descriptor_t *)(uintptr_t)desc; 76 77 cache_wlock(); 78 cache_free_descriptor(dp); 79 cache_unlock(); 80 } 81 82 void 83 dm_free_descriptors(dm_descriptor_t *desc_list) 84 { 85 descriptor_t **dp; 86 int error; 87 88 if (desc_list == NULL) { 89 return; 90 } 91 dp = desc_array_to_ptr_array(desc_list, &error); 92 if (error != 0) { 93 free(desc_list); 94 return; 95 } 96 97 cache_wlock(); 98 cache_free_descriptors(dp); 99 cache_unlock(); 100 } 101 102 /*ARGSUSED*/ 103 void 104 dm_free_name(char *name) 105 { 106 free(name); 107 } 108 109 dm_descriptor_t * 110 dm_get_associated_descriptors(dm_descriptor_t desc, dm_desc_type_t type, 111 int *errp) 112 { 113 descriptor_t **descs = NULL; 114 descriptor_t *dp; 115 116 117 dp = (descriptor_t *)(uintptr_t)desc; 118 119 cache_wlock(); 120 121 if (!cache_is_valid_desc(dp)) { 122 cache_unlock(); 123 *errp = EBADF; 124 return (NULL); 125 } 126 127 /* verify that the descriptor is still valid */ 128 if (dp->p.generic == NULL) { 129 cache_unlock(); 130 *errp = ENODEV; 131 return (NULL); 132 } 133 134 switch (dp->type) { 135 case DM_DRIVE: 136 descs = drive_get_assoc_descriptors(dp, type, errp); 137 break; 138 case DM_BUS: 139 descs = bus_get_assoc_descriptors(dp, type, errp); 140 break; 141 case DM_CONTROLLER: 142 descs = controller_get_assoc_descriptors(dp, type, errp); 143 break; 144 case DM_MEDIA: 145 descs = media_get_assoc_descriptors(dp, type, errp); 146 break; 147 case DM_SLICE: 148 descs = slice_get_assoc_descriptors(dp, type, errp); 149 break; 150 case DM_PARTITION: 151 descs = partition_get_assoc_descriptors(dp, type, errp); 152 break; 153 case DM_PATH: 154 descs = path_get_assoc_descriptors(dp, type, errp); 155 break; 156 case DM_ALIAS: 157 descs = alias_get_assoc_descriptors(dp, type, errp); 158 break; 159 default: 160 *errp = EINVAL; 161 break; 162 } 163 164 cache_unlock(); 165 166 return (ptr_array_to_desc_array(descs, errp)); 167 } 168 169 dm_desc_type_t * 170 dm_get_associated_types(dm_desc_type_t type) 171 { 172 switch (type) { 173 case DM_DRIVE: 174 return (drive_assoc_types); 175 case DM_BUS: 176 return (bus_assoc_types); 177 case DM_CONTROLLER: 178 return (controller_assoc_types); 179 case DM_MEDIA: 180 return (media_assoc_types); 181 case DM_SLICE: 182 return (slice_assoc_types); 183 case DM_PARTITION: 184 return (partition_assoc_types); 185 case DM_PATH: 186 return (path_assoc_types); 187 case DM_ALIAS: 188 return (alias_assoc_types); 189 } 190 191 return (NULL); 192 } 193 194 nvlist_t * 195 dm_get_attributes(dm_descriptor_t desc, int *errp) 196 { 197 descriptor_t *dp; 198 nvlist_t *attrs = NULL; 199 200 201 dp = (descriptor_t *)(uintptr_t)desc; 202 203 cache_rlock(); 204 205 if (!cache_is_valid_desc(dp)) { 206 cache_unlock(); 207 *errp = EBADF; 208 return (NULL); 209 } 210 211 /* verify that the descriptor is still valid */ 212 if (dp->p.generic == NULL) { 213 cache_unlock(); 214 *errp = ENODEV; 215 return (NULL); 216 } 217 218 switch (dp->type) { 219 case DM_DRIVE: 220 attrs = drive_get_attributes(dp, errp); 221 break; 222 case DM_BUS: 223 attrs = bus_get_attributes(dp, errp); 224 break; 225 case DM_CONTROLLER: 226 attrs = controller_get_attributes(dp, errp); 227 break; 228 case DM_MEDIA: 229 attrs = media_get_attributes(dp, errp); 230 break; 231 case DM_SLICE: 232 attrs = slice_get_attributes(dp, errp); 233 break; 234 case DM_PARTITION: 235 attrs = partition_get_attributes(dp, errp); 236 break; 237 case DM_PATH: 238 attrs = path_get_attributes(dp, errp); 239 break; 240 case DM_ALIAS: 241 attrs = alias_get_attributes(dp, errp); 242 break; 243 default: 244 *errp = EINVAL; 245 break; 246 } 247 248 cache_unlock(); 249 250 return (attrs); 251 } 252 253 dm_descriptor_t 254 dm_get_descriptor_by_name(dm_desc_type_t desc_type, char *name, int *errp) 255 { 256 dm_descriptor_t desc = 0; 257 258 259 cache_wlock(); 260 261 switch (desc_type) { 262 case DM_DRIVE: 263 desc = (uintptr_t)drive_get_descriptor_by_name(name, errp); 264 break; 265 case DM_BUS: 266 desc = (uintptr_t)bus_get_descriptor_by_name(name, errp); 267 break; 268 case DM_CONTROLLER: 269 desc = (uintptr_t)controller_get_descriptor_by_name(name, 270 errp); 271 break; 272 case DM_MEDIA: 273 desc = (uintptr_t)media_get_descriptor_by_name(name, errp); 274 break; 275 case DM_SLICE: 276 desc = (uintptr_t)slice_get_descriptor_by_name(name, errp); 277 break; 278 case DM_PARTITION: 279 desc = (uintptr_t)partition_get_descriptor_by_name(name, 280 errp); 281 break; 282 case DM_PATH: 283 desc = (uintptr_t)path_get_descriptor_by_name(name, errp); 284 break; 285 case DM_ALIAS: 286 desc = (uintptr_t)alias_get_descriptor_by_name(name, errp); 287 break; 288 default: 289 *errp = EINVAL; 290 break; 291 } 292 293 cache_unlock(); 294 295 return (desc); 296 } 297 298 dm_descriptor_t * 299 dm_get_descriptors(dm_desc_type_t type, int filter[], int *errp) 300 { 301 descriptor_t **descs = NULL; 302 303 304 cache_wlock(); 305 306 switch (type) { 307 case DM_DRIVE: 308 descs = drive_get_descriptors(filter, errp); 309 break; 310 case DM_BUS: 311 descs = bus_get_descriptors(filter, errp); 312 break; 313 case DM_CONTROLLER: 314 descs = controller_get_descriptors(filter, errp); 315 break; 316 case DM_MEDIA: 317 descs = media_get_descriptors(filter, errp); 318 break; 319 case DM_SLICE: 320 descs = slice_get_descriptors(filter, errp); 321 break; 322 case DM_PARTITION: 323 descs = partition_get_descriptors(filter, errp); 324 break; 325 case DM_PATH: 326 descs = path_get_descriptors(filter, errp); 327 break; 328 case DM_ALIAS: 329 descs = alias_get_descriptors(filter, errp); 330 break; 331 default: 332 *errp = EINVAL; 333 break; 334 } 335 336 cache_unlock(); 337 338 return (ptr_array_to_desc_array(descs, errp)); 339 } 340 341 char * 342 dm_get_name(dm_descriptor_t desc, int *errp) 343 { 344 descriptor_t *dp; 345 char *nm = NULL; 346 char *name = NULL; 347 348 dp = (descriptor_t *)(uintptr_t)desc; 349 350 cache_rlock(); 351 352 if (!cache_is_valid_desc(dp)) { 353 cache_unlock(); 354 *errp = EBADF; 355 return (NULL); 356 } 357 358 /* verify that the descriptor is still valid */ 359 if (dp->p.generic == NULL) { 360 cache_unlock(); 361 *errp = ENODEV; 362 return (NULL); 363 } 364 365 switch (dp->type) { 366 case DM_DRIVE: 367 nm = (drive_get_name(dp)); 368 break; 369 case DM_BUS: 370 nm = (bus_get_name(dp)); 371 break; 372 case DM_CONTROLLER: 373 nm = (controller_get_name(dp)); 374 break; 375 case DM_MEDIA: 376 nm = (media_get_name(dp)); 377 break; 378 case DM_SLICE: 379 nm = (slice_get_name(dp)); 380 break; 381 case DM_PARTITION: 382 nm = (partition_get_name(dp)); 383 break; 384 case DM_PATH: 385 nm = (path_get_name(dp)); 386 break; 387 case DM_ALIAS: 388 nm = (alias_get_name(dp)); 389 break; 390 } 391 392 cache_unlock(); 393 394 *errp = 0; 395 if (nm != NULL) { 396 name = strdup(nm); 397 if (name == NULL) { 398 *errp = ENOMEM; 399 return (NULL); 400 } 401 return (name); 402 } 403 return (NULL); 404 } 405 406 nvlist_t * 407 dm_get_stats(dm_descriptor_t desc, int stat_type, int *errp) 408 { 409 descriptor_t *dp; 410 nvlist_t *stats = NULL; 411 412 413 dp = (descriptor_t *)(uintptr_t)desc; 414 415 cache_rlock(); 416 417 if (!cache_is_valid_desc(dp)) { 418 cache_unlock(); 419 *errp = EBADF; 420 return (NULL); 421 } 422 423 /* verify that the descriptor is still valid */ 424 if (dp->p.generic == NULL) { 425 cache_unlock(); 426 *errp = ENODEV; 427 return (NULL); 428 } 429 430 switch (dp->type) { 431 case DM_DRIVE: 432 stats = drive_get_stats(dp, stat_type, errp); 433 break; 434 case DM_BUS: 435 stats = bus_get_stats(dp, stat_type, errp); 436 break; 437 case DM_CONTROLLER: 438 stats = controller_get_stats(dp, stat_type, errp); 439 break; 440 case DM_MEDIA: 441 stats = media_get_stats(dp, stat_type, errp); 442 break; 443 case DM_SLICE: 444 if (stat_type == DM_SLICE_STAT_USE) { 445 /* 446 * If NOINUSE_CHECK is set, we do not perform 447 * the in use checking if the user has set stat_type 448 * DM_SLICE_STAT_USE 449 */ 450 if (NOINUSE_SET) { 451 stats = NULL; 452 break; 453 } 454 } 455 stats = slice_get_stats(dp, stat_type, errp); 456 break; 457 case DM_PARTITION: 458 stats = partition_get_stats(dp, stat_type, errp); 459 break; 460 case DM_PATH: 461 stats = path_get_stats(dp, stat_type, errp); 462 break; 463 case DM_ALIAS: 464 stats = alias_get_stats(dp, stat_type, errp); 465 break; 466 default: 467 *errp = EINVAL; 468 break; 469 } 470 471 cache_unlock(); 472 473 return (stats); 474 } 475 476 dm_desc_type_t 477 dm_get_type(dm_descriptor_t desc) 478 { 479 descriptor_t *dp; 480 481 dp = (descriptor_t *)(uintptr_t)desc; 482 483 cache_rlock(); 484 485 if (!cache_is_valid_desc(dp)) { 486 cache_unlock(); 487 return (-1); 488 } 489 490 cache_unlock(); 491 492 return (dp->type); 493 } 494 /* 495 * Returns, via slices paramater, a dm_descriptor_t list of 496 * slices for the named disk drive. 497 */ 498 void 499 dm_get_slices(char *drive, dm_descriptor_t **slices, int *errp) 500 { 501 dm_descriptor_t alias; 502 dm_descriptor_t *media; 503 dm_descriptor_t *disk; 504 505 *slices = NULL; 506 *errp = 0; 507 508 if (drive == NULL) { 509 return; 510 } 511 512 alias = dm_get_descriptor_by_name(DM_ALIAS, drive, errp); 513 514 /* 515 * Errors must be handled by the caller. The dm_descriptor_t * 516 * values will be NULL if an error occured in these calls. 517 */ 518 519 if (alias != 0) { 520 disk = dm_get_associated_descriptors(alias, DM_DRIVE, errp); 521 dm_free_descriptor(alias); 522 if (disk != NULL) { 523 media = dm_get_associated_descriptors(*disk, 524 DM_MEDIA, errp); 525 dm_free_descriptors(disk); 526 if (media != NULL) { 527 *slices = dm_get_associated_descriptors(*media, 528 DM_SLICE, errp); 529 dm_free_descriptors(media); 530 } 531 } 532 } 533 } 534 /* 535 * Convenience function to get slice stats 536 */ 537 void 538 dm_get_slice_stats(char *slice, nvlist_t **dev_stats, int *errp) 539 { 540 dm_descriptor_t devp; 541 542 *dev_stats = NULL; 543 *errp = 0; 544 545 if (slice == NULL) { 546 return; 547 } 548 549 /* 550 * Errors must be handled by the caller. The dm_descriptor_t * 551 * values will be NULL if an error occured in these calls. 552 */ 553 devp = dm_get_descriptor_by_name(DM_SLICE, slice, errp); 554 if (devp != 0) { 555 *dev_stats = dm_get_stats(devp, DM_SLICE_STAT_USE, errp); 556 dm_free_descriptor(devp); 557 } 558 } 559 560 /* 561 * Checks for overlapping slices. If the given device is a slice, and it 562 * overlaps with any non-backup slice on the disk, return true with a detailed 563 * description similar to dm_inuse(). 564 */ 565 int 566 dm_isoverlapping(char *slicename, char **overlaps_with, int *errp) 567 { 568 dm_descriptor_t slice = 0; 569 dm_descriptor_t *media = NULL; 570 dm_descriptor_t *slices = NULL; 571 int i = 0; 572 uint32_t in_snum; 573 uint64_t start_block = 0; 574 uint64_t end_block = 0; 575 uint64_t media_size = 0; 576 uint64_t size = 0; 577 nvlist_t *media_attrs = NULL; 578 nvlist_t *slice_attrs = NULL; 579 int ret = 0; 580 581 slice = dm_get_descriptor_by_name(DM_SLICE, slicename, errp); 582 if (slice == 0) 583 goto out; 584 585 /* 586 * Get the list of slices be fetching the associated media, and then all 587 * associated slices. 588 */ 589 media = dm_get_associated_descriptors(slice, DM_MEDIA, errp); 590 if (media == NULL || *media == 0 || *errp != 0) 591 goto out; 592 593 slices = dm_get_associated_descriptors(*media, DM_SLICE, errp); 594 if (slices == NULL || *slices == 0 || *errp != 0) 595 goto out; 596 597 media_attrs = dm_get_attributes(*media, errp); 598 if (media_attrs == NULL || *errp) 599 goto out; 600 601 *errp = nvlist_lookup_uint64(media_attrs, DM_NACCESSIBLE, &media_size); 602 if (*errp != 0) 603 goto out; 604 605 slice_attrs = dm_get_attributes(slice, errp); 606 if (slice_attrs == NULL || *errp != 0) 607 goto out; 608 609 *errp = nvlist_lookup_uint64(slice_attrs, DM_START, &start_block); 610 if (*errp != 0) 611 goto out; 612 613 *errp = nvlist_lookup_uint64(slice_attrs, DM_SIZE, &size); 614 if (*errp != 0) 615 goto out; 616 617 *errp = nvlist_lookup_uint32(slice_attrs, DM_INDEX, &in_snum); 618 if (*errp != 0) 619 goto out; 620 621 end_block = (start_block + size) - 1; 622 623 for (i = 0; slices[i]; i ++) { 624 uint64_t other_start; 625 uint64_t other_end; 626 uint64_t other_size; 627 uint32_t snum; 628 629 nvlist_t *other_attrs = dm_get_attributes(slices[i], errp); 630 631 if (other_attrs == NULL) 632 continue; 633 634 if (*errp != 0) 635 goto out; 636 637 *errp = nvlist_lookup_uint64(other_attrs, DM_START, 638 &other_start); 639 if (*errp) { 640 nvlist_free(other_attrs); 641 goto out; 642 } 643 644 *errp = nvlist_lookup_uint64(other_attrs, DM_SIZE, 645 &other_size); 646 647 if (*errp) { 648 nvlist_free(other_attrs); 649 ret = -1; 650 goto out; 651 } 652 653 other_end = (other_size + other_start) - 1; 654 655 *errp = nvlist_lookup_uint32(other_attrs, DM_INDEX, 656 &snum); 657 658 if (*errp) { 659 nvlist_free(other_attrs); 660 ret = -1; 661 goto out; 662 } 663 664 /* 665 * Check to see if there are > 2 overlapping regions 666 * on this media in the same region as this slice. 667 * This is done by assuming the following: 668 * Slice 2 is the backup slice if it is the size 669 * of the whole disk 670 * If slice 2 is the overlap and slice 2 is the size of 671 * the whole disk, continue. If another slice is found 672 * that overlaps with our slice, return it. 673 * There is the potential that there is more than one slice 674 * that our slice overlaps with, however, we only return 675 * the first overlapping slice we find. 676 * 677 */ 678 if (start_block >= other_start && start_block <= other_end) { 679 if ((snum == 2 && (other_size == media_size)) || 680 snum == in_snum) { 681 continue; 682 } else { 683 char *str = dm_get_name(slices[i], errp); 684 if (*errp != 0) { 685 nvlist_free(other_attrs); 686 ret = -1; 687 goto out; 688 } 689 *overlaps_with = strdup(str); 690 dm_free_name(str); 691 nvlist_free(other_attrs); 692 ret = 1; 693 goto out; 694 } 695 } else if (other_start >= start_block && 696 other_start <= end_block) { 697 if ((snum == 2 && (other_size == media_size)) || 698 snum == in_snum) { 699 continue; 700 } else { 701 char *str = dm_get_name(slices[i], errp); 702 if (*errp != 0) { 703 nvlist_free(other_attrs); 704 ret = -1; 705 goto out; 706 } 707 *overlaps_with = strdup(str); 708 dm_free_name(str); 709 nvlist_free(other_attrs); 710 ret = 1; 711 goto out; 712 } 713 } 714 nvlist_free(other_attrs); 715 } 716 717 out: 718 nvlist_free(media_attrs); 719 nvlist_free(slice_attrs); 720 721 if (slices) 722 dm_free_descriptors(slices); 723 if (media) 724 dm_free_descriptors(media); 725 if (slice) 726 dm_free_descriptor(slice); 727 728 return (ret); 729 } 730 731 /* 732 * Get the full list of swap entries. Returns -1 on error, or >= 0 to 733 * indicate the number of entries in the list. Callers are responsible 734 * for calling dm_free_swapentries() to deallocate memory. If this 735 * returns 0, the swaptbl_t still needs to be freed. 736 */ 737 int 738 dm_get_swapentries(swaptbl_t **stp, int *errp) 739 { 740 int count, i; 741 swaptbl_t *tbl; 742 char *ptr; 743 744 *stp = NULL; 745 746 /* get number of swap entries */ 747 if ((count = swapctl(SC_GETNSWP, NULL)) < 0) { 748 *errp = errno; 749 return (-1); 750 } 751 752 if (count == 0) { 753 return (0); 754 } 755 756 /* allocate space */ 757 tbl = calloc(1, sizeof (int) + count * sizeof (swapent_t)); 758 if (tbl == NULL) { 759 *errp = ENOMEM; 760 return (-1); 761 } 762 763 ptr = calloc(1, count * MAXPATHLEN); 764 if (ptr == NULL) { 765 *errp = ENOMEM; 766 free(tbl); 767 return (-1); 768 } 769 770 /* set up pointers to the pathnames */ 771 tbl->swt_n = count; 772 for (i = 0; i < count; i++) { 773 tbl->swt_ent[i].ste_path = ptr; 774 ptr += MAXPATHLEN; 775 } 776 777 /* get list of swap paths */ 778 count = swapctl(SC_LIST, tbl); 779 if (count < 0) { 780 *errp = errno; 781 free(ptr); 782 free(tbl); 783 return (-1); 784 } 785 786 *stp = tbl; 787 return (count); 788 } 789 790 /* ARGSUSED */ 791 void 792 dm_free_swapentries(swaptbl_t *stp) 793 { 794 ASSERT(stp != NULL); 795 796 free(stp->swt_ent[0].ste_path); 797 free(stp); 798 } 799 800 /* 801 * Check a slice to see if it's being used by swap. 802 */ 803 int 804 dm_inuse_swap(const char *dev_name, int *errp) 805 { 806 int count; 807 int found; 808 swaptbl_t *tbl = NULL; 809 810 *errp = 0; 811 812 count = dm_get_swapentries(&tbl, errp); 813 if (count < 0 || *errp) { 814 if (tbl) 815 dm_free_swapentries(tbl); 816 return (-1); 817 } 818 819 /* if there are no swap entries, we're done */ 820 if (!count) { 821 return (0); 822 } 823 824 ASSERT(tbl != NULL); 825 826 found = 0; 827 while (count--) { 828 if (strcmp(dev_name, tbl->swt_ent[count].ste_path) == 0) { 829 found = 1; 830 break; 831 } 832 } 833 834 dm_free_swapentries(tbl); 835 return (found); 836 } 837 838 /* 839 * Returns 'in use' details, if found, about a specific dev_name, 840 * based on the caller(who). It is important to note that it is possible 841 * for there to be more than one 'in use' statistic regarding a dev_name. 842 * The **msg parameter returns a list of 'in use' details. This message 843 * is formatted via gettext(). 844 */ 845 int 846 dm_inuse(char *dev_name, char **msg, dm_who_type_t who, int *errp) 847 { 848 nvlist_t *dev_stats = NULL; 849 char *by, *data; 850 nvpair_t *nvwhat = NULL; 851 nvpair_t *nvdesc = NULL; 852 int found = 0; 853 int err; 854 char *dname = NULL; 855 856 *errp = 0; 857 *msg = NULL; 858 859 /* 860 * If the user doesn't want to do in use checking, return. 861 */ 862 863 if (NOINUSE_SET) 864 return (0); 865 866 dname = getfullblkname(dev_name); 867 /* 868 * If we cannot find the block name, we cannot check the device 869 * for in use statistics. So, return found, which is == 0. 870 */ 871 if (dname == NULL || *dname == '\0') { 872 return (found); 873 } 874 875 /* 876 * Slice stats for swap devices are only returned if mounted 877 * (e.g. /tmp). Other devices or files being used for swap 878 * are ignored, so we add a special check here to use swapctl(2) 879 * to perform in-use checking. 880 */ 881 if (ANY_ZPOOL_USE(who) && (err = dm_inuse_swap(dname, errp))) { 882 883 /* on error, dm_inuse_swap sets errp */ 884 if (err < 0) { 885 free(dname); 886 return (err); 887 } 888 889 /* simulate a mounted swap device */ 890 (void) build_usage_string(dname, DM_USE_MOUNT, "swap", msg, 891 &found, errp); 892 893 /* if this fails, dm_get_usage_string changed */ 894 ASSERT(found == 1); 895 896 free(dname); 897 return (found); 898 } 899 900 dm_get_slice_stats(dname, &dev_stats, errp); 901 if (dev_stats == NULL) { 902 /* 903 * If there is an error, but it isn't a no device found error 904 * return the error as recorded. Otherwise, with a full 905 * block name, we might not be able to get the slice 906 * associated, and will get an ENODEV error. 907 */ 908 if (*errp == ENODEV) 909 *errp = 0; 910 free(dname); 911 return (found); 912 } 913 914 for (;;) { 915 916 nvwhat = nvlist_next_nvpair(dev_stats, nvdesc); 917 nvdesc = nvlist_next_nvpair(dev_stats, nvwhat); 918 919 /* 920 * End of the list found. 921 */ 922 if (nvwhat == NULL || nvdesc == NULL) { 923 break; 924 } 925 /* 926 * Otherwise, we check to see if this client(who) cares 927 * about this in use scenario 928 */ 929 930 ASSERT(strcmp(nvpair_name(nvwhat), DM_USED_BY) == 0); 931 ASSERT(strcmp(nvpair_name(nvdesc), DM_USED_NAME) == 0); 932 /* 933 * If we error getting the string value continue on 934 * to the next pair(if there is one) 935 */ 936 if (nvpair_value_string(nvwhat, &by)) { 937 continue; 938 } 939 if (nvpair_value_string(nvdesc, &data)) { 940 continue; 941 } 942 943 switch (who) { 944 case DM_WHO_MKFS: 945 /* 946 * mkfs is not in use for these cases. 947 * All others are in use. 948 */ 949 if (strcmp(by, DM_USE_LU) == 0 || 950 strcmp(by, DM_USE_FS) == 0 || 951 strcmp(by, DM_USE_EXPORTED_ZPOOL) == 0) { 952 break; 953 } 954 if (build_usage_string(dname, 955 by, data, msg, &found, errp) != 0) { 956 if (*errp) { 957 goto out; 958 } 959 } 960 break; 961 case DM_WHO_SWAP: 962 /* 963 * Not in use for this. 964 */ 965 if (strcmp(by, DM_USE_DUMP) == 0 || 966 strcmp(by, DM_USE_FS) == 0 || 967 strcmp(by, DM_USE_EXPORTED_ZPOOL) == 0) { 968 break; 969 } 970 if (strcmp(by, DM_USE_LU) == 0 && 971 strcmp(data, "-") == 0) { 972 break; 973 } 974 if (strcmp(by, DM_USE_VFSTAB) == 0 && 975 strcmp(data, "") == 0) { 976 break; 977 } 978 if (build_usage_string(dname, 979 by, data, msg, &found, errp) != 0) { 980 if (*errp) { 981 goto out; 982 } 983 } 984 break; 985 case DM_WHO_DUMP: 986 /* 987 * Not in use for this. 988 */ 989 if ((strcmp(by, DM_USE_MOUNT) == 0 && 990 strcmp(data, "swap") == 0) || 991 strcmp(by, DM_USE_DUMP) == 0 || 992 strcmp(by, DM_USE_FS) == 0 || 993 strcmp(by, DM_USE_EXPORTED_ZPOOL) == 0) { 994 break; 995 } 996 if (build_usage_string(dname, 997 by, data, msg, &found, errp)) { 998 if (*errp) { 999 goto out; 1000 } 1001 } 1002 break; 1003 1004 case DM_WHO_FORMAT: 1005 if (strcmp(by, DM_USE_FS) == 0 || 1006 strcmp(by, DM_USE_EXPORTED_ZPOOL) == 0) 1007 break; 1008 if (build_usage_string(dname, 1009 by, data, msg, &found, errp) != 0) { 1010 if (*errp) { 1011 goto out; 1012 } 1013 } 1014 break; 1015 1016 case DM_WHO_ZPOOL_FORCE: 1017 if (strcmp(by, DM_USE_FS) == 0 || 1018 strcmp(by, DM_USE_EXPORTED_ZPOOL) == 0) 1019 break; 1020 /* FALLTHROUGH */ 1021 case DM_WHO_ZPOOL: 1022 if (build_usage_string(dname, 1023 by, data, msg, &found, errp) != 0) { 1024 if (*errp) 1025 goto out; 1026 } 1027 break; 1028 1029 case DM_WHO_ZPOOL_SPARE: 1030 if (strcmp(by, DM_USE_SPARE_ZPOOL) != 0) { 1031 if (build_usage_string(dname, by, 1032 data, msg, &found, errp) != 0) { 1033 if (*errp) 1034 goto out; 1035 } 1036 } 1037 break; 1038 1039 default: 1040 /* 1041 * nothing found in use for this client 1042 * of libdiskmgt. Default is 'not in use'. 1043 */ 1044 break; 1045 } 1046 } 1047 out: 1048 if (dname != NULL) 1049 free(dname); 1050 nvlist_free(dev_stats); 1051 1052 return (found); 1053 } 1054 1055 void 1056 dm_get_usage_string(char *what, char *how, char **usage_string) 1057 { 1058 1059 1060 if (usage_string == NULL || what == NULL) { 1061 return; 1062 } 1063 *usage_string = NULL; 1064 1065 if (strcmp(what, DM_USE_MOUNT) == 0) { 1066 if (strcmp(how, "swap") == 0) { 1067 *usage_string = dgettext(TEXT_DOMAIN, 1068 "%s is currently used by swap. Please see swap(8)." 1069 "\n"); 1070 } else { 1071 *usage_string = dgettext(TEXT_DOMAIN, 1072 "%s is currently mounted on %s." 1073 " Please see umount(8).\n"); 1074 } 1075 } else if (strcmp(what, DM_USE_VFSTAB) == 0) { 1076 *usage_string = dgettext(TEXT_DOMAIN, 1077 "%s is normally mounted on %s according to /etc/vfstab. " 1078 "Please remove this entry to use this device.\n"); 1079 } else if (strcmp(what, DM_USE_FS) == 0) { 1080 *usage_string = dgettext(TEXT_DOMAIN, 1081 "%s contains a %s filesystem.\n"); 1082 } else if (strcmp(what, DM_USE_VXVM) == 0) { 1083 *usage_string = dgettext(TEXT_DOMAIN, 1084 "%s is part of VxVM volume %s.\n"); 1085 } else if (strcmp(what, DM_USE_LU) == 0) { 1086 *usage_string = dgettext(TEXT_DOMAIN, 1087 "%s is in use for live upgrade %s. Please see ludelete(8)." 1088 "\n"); 1089 } else if (strcmp(what, DM_USE_DUMP) == 0) { 1090 *usage_string = dgettext(TEXT_DOMAIN, 1091 "%s is in use by %s. Please see dumpadm(8)." 1092 "\n"); 1093 } else if (strcmp(what, DM_USE_EXPORTED_ZPOOL) == 0) { 1094 *usage_string = dgettext(TEXT_DOMAIN, 1095 "%s is part of exported or potentially active ZFS pool %s. " 1096 "Please see zpool(8).\n"); 1097 } else if (strcmp(what, DM_USE_ACTIVE_ZPOOL) == 0) { 1098 *usage_string = dgettext(TEXT_DOMAIN, 1099 "%s is part of active ZFS pool %s. Please see zpool(8)." 1100 "\n"); 1101 } else if (strcmp(what, DM_USE_SPARE_ZPOOL) == 0) { 1102 *usage_string = dgettext(TEXT_DOMAIN, 1103 "%s is reserved as a hot spare for ZFS pool %s. Please " 1104 "see zpool(8).\n"); 1105 } else if (strcmp(what, DM_USE_L2CACHE_ZPOOL) == 0) { 1106 *usage_string = dgettext(TEXT_DOMAIN, 1107 "%s is in use as a cache device for ZFS pool %s. " 1108 "Please see zpool(8).\n"); 1109 } 1110 } 1111 void 1112 libdiskmgt_add_str(nvlist_t *attrs, char *name, char *val, int *errp) 1113 { 1114 if (*errp == 0) { 1115 *errp = nvlist_add_string(attrs, name, val); 1116 } 1117 } 1118 1119 descriptor_t ** 1120 libdiskmgt_empty_desc_array(int *errp) 1121 { 1122 descriptor_t **empty; 1123 1124 empty = (descriptor_t **)calloc(1, sizeof (descriptor_t *)); 1125 if (empty == NULL) { 1126 *errp = ENOMEM; 1127 return (NULL); 1128 } 1129 empty[0] = NULL; 1130 1131 *errp = 0; 1132 return (empty); 1133 } 1134 1135 void 1136 libdiskmgt_init_debug() 1137 { 1138 char *valp; 1139 1140 if ((valp = getenv(DM_DEBUG)) != NULL) { 1141 dm_debug = atoi(valp); 1142 } 1143 } 1144 1145 int 1146 libdiskmgt_str_eq(char *nm1, char *nm2) 1147 { 1148 if (nm1 == NULL) { 1149 if (dm_debug) { 1150 (void) fprintf(stderr, "WARNING: str_eq nm1 NULL\n"); 1151 } 1152 1153 if (nm2 == NULL) { 1154 return (1); 1155 } else { 1156 return (0); 1157 } 1158 } 1159 1160 /* nm1 != NULL */ 1161 1162 if (nm2 == NULL) { 1163 if (dm_debug) { 1164 (void) fprintf(stderr, "WARNING: str_eq nm2 NULL\n"); 1165 } 1166 return (0); 1167 } 1168 1169 if (strcmp(nm1, nm2) == 0) { 1170 return (1); 1171 } 1172 1173 return (0); 1174 } 1175 1176 /*ARGSUSED*/ 1177 static descriptor_t ** 1178 desc_array_to_ptr_array(dm_descriptor_t *descs, int *errp) 1179 { 1180 #ifdef _LP64 1181 return ((descriptor_t **)descs); 1182 #else 1183 /* convert the 64 bit descriptors to 32 bit ptrs */ 1184 int cnt; 1185 int i; 1186 descriptor_t **da; 1187 1188 for (cnt = 0; descs[cnt]; cnt++) 1189 ; 1190 1191 da = (descriptor_t **)calloc(cnt + 1, sizeof (descriptor_t *)); 1192 if (da == NULL) { 1193 *errp = ENOMEM; 1194 return (NULL); 1195 } 1196 1197 for (i = 0; descs[i]; i++) { 1198 da[i] = (descriptor_t *)(uintptr_t)descs[i]; 1199 } 1200 *errp = 0; 1201 free(descs); 1202 1203 return (da); 1204 #endif 1205 } 1206 1207 /*ARGSUSED*/ 1208 static dm_descriptor_t * 1209 ptr_array_to_desc_array(descriptor_t **ptrs, int *errp) 1210 { 1211 #ifdef _LP64 1212 return ((dm_descriptor_t *)ptrs); 1213 #else 1214 /* convert the 32 bit ptrs to the 64 bit descriptors */ 1215 int cnt; 1216 int i; 1217 dm_descriptor_t *da; 1218 1219 if (*errp != 0 || ptrs == NULL) { 1220 return (NULL); 1221 } 1222 1223 for (cnt = 0; ptrs[cnt]; cnt++) 1224 ; 1225 1226 da = (dm_descriptor_t *)calloc(cnt + 1, sizeof (dm_descriptor_t)); 1227 if (da == NULL) { 1228 *errp = ENOMEM; 1229 return (NULL); 1230 } 1231 1232 for (i = 0; ptrs[i]; i++) { 1233 da[i] = (uintptr_t)ptrs[i]; 1234 } 1235 *errp = 0; 1236 free(ptrs); 1237 1238 return (da); 1239 #endif 1240 } 1241 /* 1242 * Build the usage string for the in use data. Return the build string in 1243 * the msg parameter. This function takes care of reallocing all the memory 1244 * for this usage string. Usage string is returned already formatted for 1245 * localization. 1246 */ 1247 static int 1248 build_usage_string(char *dname, char *by, char *data, char **msg, 1249 int *found, int *errp) 1250 { 1251 int len0; 1252 int len1; 1253 char *use; 1254 char *p; 1255 1256 *errp = 0; 1257 1258 dm_get_usage_string(by, data, &use); 1259 if (!use) { 1260 return (-1); 1261 } 1262 1263 if (*msg) 1264 len0 = strlen(*msg); 1265 else 1266 len0 = 0; 1267 /* LINTED */ 1268 len1 = snprintf(NULL, 0, use, dname, data); 1269 1270 /* 1271 * If multiple in use details they 1272 * are listed 1 per line for ease of 1273 * reading. dm_find_usage_string 1274 * formats these appropriately. 1275 */ 1276 if ((p = realloc(*msg, len0 + len1 + 1)) == NULL) { 1277 *errp = errno; 1278 free(*msg); 1279 return (-1); 1280 } 1281 *msg = p; 1282 1283 /* LINTED */ 1284 (void) snprintf(*msg + len0, len1 + 1, use, dname, data); 1285 (*found)++; 1286 return (0); 1287 } 1288