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 2006 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 #pragma ident "%Z%%M% %I% %E% SMI" 27 28 #include <assert.h> 29 #include <ctype.h> 30 #include <errno.h> 31 #include <libgen.h> 32 #include <libintl.h> 33 #include <libuutil.h> 34 #include <locale.h> 35 #include <stddef.h> 36 #include <stdio.h> 37 #include <stdlib.h> 38 #include <strings.h> 39 #include <unistd.h> 40 #include <fcntl.h> 41 #include <zone.h> 42 #include <sys/mkdev.h> 43 #include <sys/mntent.h> 44 #include <sys/mnttab.h> 45 #include <sys/mount.h> 46 #include <sys/stat.h> 47 48 #include <libzfs.h> 49 50 #include "zfs_iter.h" 51 #include "zfs_util.h" 52 53 libzfs_handle_t *g_zfs; 54 55 static FILE *mnttab_file; 56 57 static int zfs_do_clone(int argc, char **argv); 58 static int zfs_do_create(int argc, char **argv); 59 static int zfs_do_destroy(int argc, char **argv); 60 static int zfs_do_get(int argc, char **argv); 61 static int zfs_do_inherit(int argc, char **argv); 62 static int zfs_do_list(int argc, char **argv); 63 static int zfs_do_mount(int argc, char **argv); 64 static int zfs_do_rename(int argc, char **argv); 65 static int zfs_do_rollback(int argc, char **argv); 66 static int zfs_do_set(int argc, char **argv); 67 static int zfs_do_snapshot(int argc, char **argv); 68 static int zfs_do_unmount(int argc, char **argv); 69 static int zfs_do_share(int argc, char **argv); 70 static int zfs_do_unshare(int argc, char **argv); 71 static int zfs_do_send(int argc, char **argv); 72 static int zfs_do_receive(int argc, char **argv); 73 static int zfs_do_promote(int argc, char **argv); 74 75 /* 76 * These libumem hooks provide a reasonable set of defaults for the allocator's 77 * debugging facilities. 78 */ 79 const char * 80 _umem_debug_init() 81 { 82 return ("default,verbose"); /* $UMEM_DEBUG setting */ 83 } 84 85 const char * 86 _umem_logging_init(void) 87 { 88 return ("fail,contents"); /* $UMEM_LOGGING setting */ 89 } 90 91 typedef enum { 92 HELP_CLONE, 93 HELP_CREATE, 94 HELP_DESTROY, 95 HELP_GET, 96 HELP_INHERIT, 97 HELP_LIST, 98 HELP_MOUNT, 99 HELP_PROMOTE, 100 HELP_RECEIVE, 101 HELP_RENAME, 102 HELP_ROLLBACK, 103 HELP_SEND, 104 HELP_SET, 105 HELP_SHARE, 106 HELP_SNAPSHOT, 107 HELP_UNMOUNT, 108 HELP_UNSHARE 109 } zfs_help_t; 110 111 typedef struct zfs_command { 112 const char *name; 113 int (*func)(int argc, char **argv); 114 zfs_help_t usage; 115 } zfs_command_t; 116 117 /* 118 * Master command table. Each ZFS command has a name, associated function, and 119 * usage message. The usage messages need to be internationalized, so we have 120 * to have a function to return the usage message based on a command index. 121 * 122 * These commands are organized according to how they are displayed in the usage 123 * message. An empty command (one with a NULL name) indicates an empty line in 124 * the generic usage message. 125 */ 126 static zfs_command_t command_table[] = { 127 { "create", zfs_do_create, HELP_CREATE }, 128 { "destroy", zfs_do_destroy, HELP_DESTROY }, 129 { NULL }, 130 { "snapshot", zfs_do_snapshot, HELP_SNAPSHOT }, 131 { "rollback", zfs_do_rollback, HELP_ROLLBACK }, 132 { "clone", zfs_do_clone, HELP_CLONE }, 133 { "promote", zfs_do_promote, HELP_PROMOTE }, 134 { "rename", zfs_do_rename, HELP_RENAME }, 135 { NULL }, 136 { "list", zfs_do_list, HELP_LIST }, 137 { NULL }, 138 { "set", zfs_do_set, HELP_SET }, 139 { "get", zfs_do_get, HELP_GET }, 140 { "inherit", zfs_do_inherit, HELP_INHERIT }, 141 { NULL }, 142 { "mount", zfs_do_mount, HELP_MOUNT }, 143 { NULL }, 144 { "unmount", zfs_do_unmount, HELP_UNMOUNT }, 145 { NULL }, 146 { "share", zfs_do_share, HELP_SHARE }, 147 { NULL }, 148 { "unshare", zfs_do_unshare, HELP_UNSHARE }, 149 { NULL }, 150 { "send", zfs_do_send, HELP_SEND }, 151 { "receive", zfs_do_receive, HELP_RECEIVE }, 152 }; 153 154 #define NCOMMAND (sizeof (command_table) / sizeof (command_table[0])) 155 156 zfs_command_t *current_command; 157 158 static const char * 159 get_usage(zfs_help_t idx) 160 { 161 switch (idx) { 162 case HELP_CLONE: 163 return (gettext("\tclone <snapshot> <filesystem|volume>\n")); 164 case HELP_CREATE: 165 return (gettext("\tcreate [[-o property=value] ... ] " 166 "<filesystem>\n" 167 "\tcreate [-s] [-b blocksize] [[-o property=value] ...]\n" 168 "\t -V <size> <volume>\n")); 169 case HELP_DESTROY: 170 return (gettext("\tdestroy [-rRf] " 171 "<filesystem|volume|snapshot>\n")); 172 case HELP_GET: 173 return (gettext("\tget [-rHp] [-o field[,field]...] " 174 "[-s source[,source]...]\n" 175 "\t <all | property[,property]...> " 176 "[filesystem|volume|snapshot] ...\n")); 177 case HELP_INHERIT: 178 return (gettext("\tinherit [-r] <property> " 179 "<filesystem|volume> ...\n")); 180 case HELP_LIST: 181 return (gettext("\tlist [-rH] [-o property[,property]...] " 182 "[-t type[,type]...]\n" 183 "\t [-s property [-s property]...]" 184 " [-S property [-S property]...]\n" 185 "\t [filesystem|volume|snapshot] ...\n")); 186 case HELP_MOUNT: 187 return (gettext("\tmount\n" 188 "\tmount [-o opts] [-O] -a\n" 189 "\tmount [-o opts] [-O] <filesystem>\n")); 190 case HELP_PROMOTE: 191 return (gettext("\tpromote <clone filesystem>\n")); 192 case HELP_RECEIVE: 193 return (gettext("\treceive [-vnF] <filesystem|volume|" 194 "snapshot>\n" 195 "\treceive [-vnF] -d <filesystem>\n")); 196 case HELP_RENAME: 197 return (gettext("\trename <filesystem|volume|snapshot> " 198 "<filesystem|volume|snapshot>\n")); 199 case HELP_ROLLBACK: 200 return (gettext("\trollback [-rRf] <snapshot>\n")); 201 case HELP_SEND: 202 return (gettext("\tsend [-i <snapshot>] <snapshot>\n")); 203 case HELP_SET: 204 return (gettext("\tset <property=value> " 205 "<filesystem|volume> ...\n")); 206 case HELP_SHARE: 207 return (gettext("\tshare -a\n" 208 "\tshare <filesystem>\n")); 209 case HELP_SNAPSHOT: 210 return (gettext("\tsnapshot [-r] " 211 "<filesystem@name|volume@name>\n")); 212 case HELP_UNMOUNT: 213 return (gettext("\tunmount [-f] -a\n" 214 "\tunmount [-f] <filesystem|mountpoint>\n")); 215 case HELP_UNSHARE: 216 return (gettext("\tunshare [-f] -a\n" 217 "\tunshare [-f] <filesystem|mountpoint>\n")); 218 } 219 220 abort(); 221 /* NOTREACHED */ 222 } 223 224 /* 225 * Utility function to guarantee malloc() success. 226 */ 227 void * 228 safe_malloc(size_t size) 229 { 230 void *data; 231 232 if ((data = calloc(1, size)) == NULL) { 233 (void) fprintf(stderr, "internal error: out of memory\n"); 234 exit(1); 235 } 236 237 return (data); 238 } 239 240 /* 241 * Display usage message. If we're inside a command, display only the usage for 242 * that command. Otherwise, iterate over the entire command table and display 243 * a complete usage message. 244 */ 245 static void 246 usage(boolean_t requested) 247 { 248 int i; 249 boolean_t show_properties = B_FALSE; 250 FILE *fp = requested ? stdout : stderr; 251 252 if (current_command == NULL) { 253 254 (void) fprintf(fp, gettext("usage: zfs command args ...\n")); 255 (void) fprintf(fp, 256 gettext("where 'command' is one of the following:\n\n")); 257 258 for (i = 0; i < NCOMMAND; i++) { 259 if (command_table[i].name == NULL) 260 (void) fprintf(fp, "\n"); 261 else 262 (void) fprintf(fp, "%s", 263 get_usage(command_table[i].usage)); 264 } 265 266 (void) fprintf(fp, gettext("\nEach dataset is of the form: " 267 "pool/[dataset/]*dataset[@name]\n")); 268 } else { 269 (void) fprintf(fp, gettext("usage:\n")); 270 (void) fprintf(fp, "%s", get_usage(current_command->usage)); 271 } 272 273 if (current_command != NULL && 274 (strcmp(current_command->name, "set") == 0 || 275 strcmp(current_command->name, "get") == 0 || 276 strcmp(current_command->name, "inherit") == 0 || 277 strcmp(current_command->name, "list") == 0)) 278 show_properties = B_TRUE; 279 280 if (show_properties) { 281 282 (void) fprintf(fp, 283 gettext("\nThe following properties are supported:\n")); 284 285 (void) fprintf(fp, "\n\t%-13s %s %s %s\n\n", 286 "PROPERTY", "EDIT", "INHERIT", "VALUES"); 287 288 for (i = 0; i < ZFS_NPROP_VISIBLE; i++) { 289 (void) fprintf(fp, "\t%-13s ", zfs_prop_to_name(i)); 290 291 if (zfs_prop_readonly(i)) 292 (void) fprintf(fp, " NO "); 293 else 294 (void) fprintf(fp, " YES "); 295 296 if (zfs_prop_inheritable(i)) 297 (void) fprintf(fp, " YES "); 298 else 299 (void) fprintf(fp, " NO "); 300 301 if (zfs_prop_values(i) == NULL) 302 (void) fprintf(fp, "-\n"); 303 else 304 (void) fprintf(fp, "%s\n", zfs_prop_values(i)); 305 } 306 (void) fprintf(fp, gettext("\nSizes are specified in bytes " 307 "with standard units such as K, M, G, etc.\n")); 308 (void) fprintf(fp, gettext("\n\nUser-defined properties can " 309 "be specified by using a name containing a colon (:).\n")); 310 } else { 311 /* 312 * TRANSLATION NOTE: 313 * "zfs set|get" must not be localised this is the 314 * command name and arguments. 315 */ 316 (void) fprintf(fp, 317 gettext("\nFor the property list, run: zfs set|get\n")); 318 } 319 320 /* 321 * See comments at end of main(). 322 */ 323 if (getenv("ZFS_ABORT") != NULL) { 324 (void) printf("dumping core by request\n"); 325 abort(); 326 } 327 328 exit(requested ? 0 : 2); 329 } 330 331 /* 332 * zfs clone <fs, snap, vol> fs 333 * 334 * Given an existing dataset, create a writable copy whose initial contents 335 * are the same as the source. The newly created dataset maintains a 336 * dependency on the original; the original cannot be destroyed so long as 337 * the clone exists. 338 */ 339 static int 340 zfs_do_clone(int argc, char **argv) 341 { 342 zfs_handle_t *zhp; 343 int ret; 344 345 /* check options */ 346 if (argc > 1 && argv[1][0] == '-') { 347 (void) fprintf(stderr, gettext("invalid option '%c'\n"), 348 argv[1][1]); 349 usage(B_FALSE); 350 } 351 352 /* check number of arguments */ 353 if (argc < 2) { 354 (void) fprintf(stderr, gettext("missing source dataset " 355 "argument\n")); 356 usage(B_FALSE); 357 } 358 if (argc < 3) { 359 (void) fprintf(stderr, gettext("missing target dataset " 360 "argument\n")); 361 usage(B_FALSE); 362 } 363 if (argc > 3) { 364 (void) fprintf(stderr, gettext("too many arguments\n")); 365 usage(B_FALSE); 366 } 367 368 /* open the source dataset */ 369 if ((zhp = zfs_open(g_zfs, argv[1], ZFS_TYPE_SNAPSHOT)) == NULL) 370 return (1); 371 372 /* pass to libzfs */ 373 ret = zfs_clone(zhp, argv[2], NULL); 374 375 /* create the mountpoint if necessary */ 376 if (ret == 0) { 377 zfs_handle_t *clone = zfs_open(g_zfs, argv[2], ZFS_TYPE_ANY); 378 if (clone != NULL) { 379 if ((ret = zfs_mount(clone, NULL, 0)) == 0) 380 ret = zfs_share(clone); 381 zfs_close(clone); 382 } 383 } 384 385 zfs_close(zhp); 386 387 return (ret == 0 ? 0 : 1); 388 } 389 390 /* 391 * zfs create [-o prop=value] ... fs 392 * zfs create [-s] [-b blocksize] [-o prop=value] ... -V vol size 393 * 394 * Create a new dataset. This command can be used to create filesystems 395 * and volumes. Snapshot creation is handled by 'zfs snapshot'. 396 * For volumes, the user must specify a size to be used. 397 * 398 * The '-s' flag applies only to volumes, and indicates that we should not try 399 * to set the reservation for this volume. By default we set a reservation 400 * equal to the size for any volume. 401 */ 402 static int 403 zfs_do_create(int argc, char **argv) 404 { 405 zfs_type_t type = ZFS_TYPE_FILESYSTEM; 406 zfs_handle_t *zhp = NULL; 407 uint64_t volsize; 408 int c; 409 boolean_t noreserve = B_FALSE; 410 int ret = 1; 411 nvlist_t *props = NULL; 412 uint64_t intval; 413 char *propname; 414 char *propval, *strval; 415 416 if (nvlist_alloc(&props, NV_UNIQUE_NAME, 0) != 0) { 417 (void) fprintf(stderr, gettext("internal error: " 418 "out of memory\n")); 419 return (1); 420 } 421 422 /* check options */ 423 while ((c = getopt(argc, argv, ":V:b:so:")) != -1) { 424 switch (c) { 425 case 'V': 426 type = ZFS_TYPE_VOLUME; 427 if (zfs_nicestrtonum(g_zfs, optarg, &intval) != 0) { 428 (void) fprintf(stderr, gettext("bad volume " 429 "size '%s': %s\n"), optarg, 430 libzfs_error_description(g_zfs)); 431 goto error; 432 } 433 434 if (nvlist_add_uint64(props, 435 zfs_prop_to_name(ZFS_PROP_VOLSIZE), 436 intval) != 0) { 437 (void) fprintf(stderr, gettext("internal " 438 "error: out of memory\n")); 439 goto error; 440 } 441 volsize = intval; 442 break; 443 case 'b': 444 if (zfs_nicestrtonum(g_zfs, optarg, &intval) != 0) { 445 (void) fprintf(stderr, gettext("bad volume " 446 "block size '%s': %s\n"), optarg, 447 libzfs_error_description(g_zfs)); 448 goto error; 449 } 450 451 if (nvlist_add_uint64(props, 452 zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE), 453 intval) != 0) { 454 (void) fprintf(stderr, gettext("internal " 455 "error: out of memory\n")); 456 goto error; 457 } 458 break; 459 case 'o': 460 propname = optarg; 461 if ((propval = strchr(propname, '=')) == NULL) { 462 (void) fprintf(stderr, gettext("missing " 463 "'=' for -o option\n")); 464 goto error; 465 } 466 *propval = '\0'; 467 propval++; 468 if (nvlist_lookup_string(props, propname, 469 &strval) == 0) { 470 (void) fprintf(stderr, gettext("property '%s' " 471 "specified multiple times\n"), propname); 472 goto error; 473 } 474 if (nvlist_add_string(props, propname, propval) != 0) { 475 (void) fprintf(stderr, gettext("internal " 476 "error: out of memory\n")); 477 goto error; 478 } 479 break; 480 case 's': 481 noreserve = B_TRUE; 482 break; 483 case ':': 484 (void) fprintf(stderr, gettext("missing size " 485 "argument\n")); 486 goto badusage; 487 break; 488 case '?': 489 (void) fprintf(stderr, gettext("invalid option '%c'\n"), 490 optopt); 491 goto badusage; 492 } 493 } 494 495 if (noreserve && type != ZFS_TYPE_VOLUME) { 496 (void) fprintf(stderr, gettext("'-s' can only be used when " 497 "creating a volume\n")); 498 goto badusage; 499 } 500 501 argc -= optind; 502 argv += optind; 503 504 /* check number of arguments */ 505 if (argc == 0) { 506 (void) fprintf(stderr, gettext("missing %s argument\n"), 507 zfs_type_to_name(type)); 508 goto badusage; 509 } 510 if (argc > 1) { 511 (void) fprintf(stderr, gettext("too many arguments\n")); 512 goto badusage; 513 } 514 515 if (type == ZFS_TYPE_VOLUME && !noreserve && 516 nvlist_lookup_string(props, zfs_prop_to_name(ZFS_PROP_RESERVATION), 517 &strval) != 0) { 518 if (nvlist_add_uint64(props, 519 zfs_prop_to_name(ZFS_PROP_RESERVATION), 520 volsize) != 0) { 521 (void) fprintf(stderr, gettext("internal " 522 "error: out of memory\n")); 523 nvlist_free(props); 524 return (1); 525 } 526 } 527 528 /* pass to libzfs */ 529 if (zfs_create(g_zfs, argv[0], type, props) != 0) 530 goto error; 531 532 if ((zhp = zfs_open(g_zfs, argv[0], ZFS_TYPE_ANY)) == NULL) 533 goto error; 534 535 /* 536 * Mount and/or share the new filesystem as appropriate. We provide a 537 * verbose error message to let the user know that their filesystem was 538 * in fact created, even if we failed to mount or share it. 539 */ 540 if (zfs_mount(zhp, NULL, 0) != 0) { 541 (void) fprintf(stderr, gettext("filesystem successfully " 542 "created, but not mounted\n")); 543 ret = 1; 544 } else if (zfs_share(zhp) != 0) { 545 (void) fprintf(stderr, gettext("filesystem successfully " 546 "created, but not shared\n")); 547 ret = 1; 548 } else { 549 ret = 0; 550 } 551 552 error: 553 if (zhp) 554 zfs_close(zhp); 555 nvlist_free(props); 556 return (ret); 557 badusage: 558 nvlist_free(props); 559 usage(B_FALSE); 560 return (2); 561 } 562 563 /* 564 * zfs destroy [-rf] <fs, snap, vol> 565 * 566 * -r Recursively destroy all children 567 * -R Recursively destroy all dependents, including clones 568 * -f Force unmounting of any dependents 569 * 570 * Destroys the given dataset. By default, it will unmount any filesystems, 571 * and refuse to destroy a dataset that has any dependents. A dependent can 572 * either be a child, or a clone of a child. 573 */ 574 typedef struct destroy_cbdata { 575 boolean_t cb_first; 576 int cb_force; 577 int cb_recurse; 578 int cb_error; 579 int cb_needforce; 580 int cb_doclones; 581 zfs_handle_t *cb_target; 582 char *cb_snapname; 583 } destroy_cbdata_t; 584 585 /* 586 * Check for any dependents based on the '-r' or '-R' flags. 587 */ 588 static int 589 destroy_check_dependent(zfs_handle_t *zhp, void *data) 590 { 591 destroy_cbdata_t *cbp = data; 592 const char *tname = zfs_get_name(cbp->cb_target); 593 const char *name = zfs_get_name(zhp); 594 595 if (strncmp(tname, name, strlen(tname)) == 0 && 596 (name[strlen(tname)] == '/' || name[strlen(tname)] == '@')) { 597 /* 598 * This is a direct descendant, not a clone somewhere else in 599 * the hierarchy. 600 */ 601 if (cbp->cb_recurse) 602 goto out; 603 604 if (cbp->cb_first) { 605 (void) fprintf(stderr, gettext("cannot destroy '%s': " 606 "%s has children\n"), 607 zfs_get_name(cbp->cb_target), 608 zfs_type_to_name(zfs_get_type(cbp->cb_target))); 609 (void) fprintf(stderr, gettext("use '-r' to destroy " 610 "the following datasets:\n")); 611 cbp->cb_first = B_FALSE; 612 cbp->cb_error = 1; 613 } 614 615 (void) fprintf(stderr, "%s\n", zfs_get_name(zhp)); 616 } else { 617 /* 618 * This is a clone. We only want to report this if the '-r' 619 * wasn't specified, or the target is a snapshot. 620 */ 621 if (!cbp->cb_recurse && 622 zfs_get_type(cbp->cb_target) != ZFS_TYPE_SNAPSHOT) 623 goto out; 624 625 if (cbp->cb_first) { 626 (void) fprintf(stderr, gettext("cannot destroy '%s': " 627 "%s has dependent clones\n"), 628 zfs_get_name(cbp->cb_target), 629 zfs_type_to_name(zfs_get_type(cbp->cb_target))); 630 (void) fprintf(stderr, gettext("use '-R' to destroy " 631 "the following datasets:\n")); 632 cbp->cb_first = B_FALSE; 633 cbp->cb_error = 1; 634 } 635 636 (void) fprintf(stderr, "%s\n", zfs_get_name(zhp)); 637 } 638 639 out: 640 zfs_close(zhp); 641 return (0); 642 } 643 644 static int 645 destroy_callback(zfs_handle_t *zhp, void *data) 646 { 647 destroy_cbdata_t *cbp = data; 648 649 /* 650 * Ignore pools (which we've already flagged as an error before getting 651 * here. 652 */ 653 if (strchr(zfs_get_name(zhp), '/') == NULL && 654 zfs_get_type(zhp) == ZFS_TYPE_FILESYSTEM) { 655 zfs_close(zhp); 656 return (0); 657 } 658 659 /* 660 * Bail out on the first error. 661 */ 662 if (zfs_unmount(zhp, NULL, cbp->cb_force ? MS_FORCE : 0) != 0 || 663 zfs_destroy(zhp) != 0) { 664 zfs_close(zhp); 665 return (-1); 666 } 667 668 zfs_close(zhp); 669 return (0); 670 } 671 672 static int 673 destroy_snap_clones(zfs_handle_t *zhp, void *arg) 674 { 675 destroy_cbdata_t *cbp = arg; 676 char thissnap[MAXPATHLEN]; 677 zfs_handle_t *szhp; 678 679 (void) snprintf(thissnap, sizeof (thissnap), 680 "%s@%s", zfs_get_name(zhp), cbp->cb_snapname); 681 682 libzfs_print_on_error(g_zfs, B_FALSE); 683 szhp = zfs_open(g_zfs, thissnap, ZFS_TYPE_SNAPSHOT); 684 libzfs_print_on_error(g_zfs, B_TRUE); 685 if (szhp) { 686 /* 687 * Destroy any clones of this snapshot 688 */ 689 if (zfs_iter_dependents(szhp, B_FALSE, destroy_callback, 690 cbp) != 0) { 691 zfs_close(szhp); 692 return (-1); 693 } 694 zfs_close(szhp); 695 } 696 697 return (zfs_iter_filesystems(zhp, destroy_snap_clones, arg)); 698 } 699 700 static int 701 zfs_do_destroy(int argc, char **argv) 702 { 703 destroy_cbdata_t cb = { 0 }; 704 int c; 705 zfs_handle_t *zhp; 706 char *cp; 707 708 /* check options */ 709 while ((c = getopt(argc, argv, "frR")) != -1) { 710 switch (c) { 711 case 'f': 712 cb.cb_force = 1; 713 break; 714 case 'r': 715 cb.cb_recurse = 1; 716 break; 717 case 'R': 718 cb.cb_recurse = 1; 719 cb.cb_doclones = 1; 720 break; 721 case '?': 722 default: 723 (void) fprintf(stderr, gettext("invalid option '%c'\n"), 724 optopt); 725 usage(B_FALSE); 726 } 727 } 728 729 argc -= optind; 730 argv += optind; 731 732 /* check number of arguments */ 733 if (argc == 0) { 734 (void) fprintf(stderr, gettext("missing path argument\n")); 735 usage(B_FALSE); 736 } 737 if (argc > 1) { 738 (void) fprintf(stderr, gettext("too many arguments\n")); 739 usage(B_FALSE); 740 } 741 742 /* 743 * If we are doing recursive destroy of a snapshot, then the 744 * named snapshot may not exist. Go straight to libzfs. 745 */ 746 if (cb.cb_recurse && (cp = strchr(argv[0], '@'))) { 747 int ret; 748 749 *cp = '\0'; 750 if ((zhp = zfs_open(g_zfs, argv[0], ZFS_TYPE_ANY)) == NULL) 751 return (1); 752 *cp = '@'; 753 cp++; 754 755 if (cb.cb_doclones) { 756 cb.cb_snapname = cp; 757 if (destroy_snap_clones(zhp, &cb) != 0) { 758 zfs_close(zhp); 759 return (1); 760 } 761 } 762 763 ret = zfs_destroy_snaps(zhp, cp); 764 zfs_close(zhp); 765 if (ret) { 766 (void) fprintf(stderr, 767 gettext("no snapshots destroyed\n")); 768 } 769 return (ret != 0); 770 } 771 772 773 /* Open the given dataset */ 774 if ((zhp = zfs_open(g_zfs, argv[0], ZFS_TYPE_ANY)) == NULL) 775 return (1); 776 777 cb.cb_target = zhp; 778 779 /* 780 * Perform an explicit check for pools before going any further. 781 */ 782 if (!cb.cb_recurse && strchr(zfs_get_name(zhp), '/') == NULL && 783 zfs_get_type(zhp) == ZFS_TYPE_FILESYSTEM) { 784 (void) fprintf(stderr, gettext("cannot destroy '%s': " 785 "operation does not apply to pools\n"), 786 zfs_get_name(zhp)); 787 (void) fprintf(stderr, gettext("use 'zfs destroy -r " 788 "%s' to destroy all datasets in the pool\n"), 789 zfs_get_name(zhp)); 790 (void) fprintf(stderr, gettext("use 'zpool destroy %s' " 791 "to destroy the pool itself\n"), zfs_get_name(zhp)); 792 zfs_close(zhp); 793 return (1); 794 } 795 796 /* 797 * Check for any dependents and/or clones. 798 */ 799 cb.cb_first = B_TRUE; 800 if (!cb.cb_doclones && 801 zfs_iter_dependents(zhp, B_TRUE, destroy_check_dependent, 802 &cb) != 0) { 803 zfs_close(zhp); 804 return (1); 805 } 806 807 808 if (cb.cb_error || 809 zfs_iter_dependents(zhp, B_FALSE, destroy_callback, &cb) != 0) { 810 zfs_close(zhp); 811 return (1); 812 } 813 814 /* 815 * Do the real thing. The callback will close the handle regardless of 816 * whether it succeeds or not. 817 */ 818 if (destroy_callback(zhp, &cb) != 0) 819 return (1); 820 821 return (0); 822 } 823 824 /* 825 * zfs get [-rHp] [-o field[,field]...] [-s source[,source]...] 826 * < all | property[,property]... > < fs | snap | vol > ... 827 * 828 * -r recurse over any child datasets 829 * -H scripted mode. Headers are stripped, and fields are separated 830 * by tabs instead of spaces. 831 * -o Set of fields to display. One of "name,property,value,source". 832 * Default is all four. 833 * -s Set of sources to allow. One of 834 * "local,default,inherited,temporary,none". Default is all 835 * five. 836 * -p Display values in parsable (literal) format. 837 * 838 * Prints properties for the given datasets. The user can control which 839 * columns to display as well as which property types to allow. 840 */ 841 typedef struct get_cbdata { 842 int cb_sources; 843 int cb_columns[4]; 844 int cb_colwidths[5]; 845 boolean_t cb_scripted; 846 boolean_t cb_literal; 847 boolean_t cb_first; 848 zfs_proplist_t *cb_proplist; 849 } get_cbdata_t; 850 851 #define GET_COL_NAME 1 852 #define GET_COL_PROPERTY 2 853 #define GET_COL_VALUE 3 854 #define GET_COL_SOURCE 4 855 856 /* 857 * Print the column headers for 'zfs get'. 858 */ 859 static void 860 print_get_headers(get_cbdata_t *cbp) 861 { 862 zfs_proplist_t *pl = cbp->cb_proplist; 863 int i; 864 char *title; 865 size_t len; 866 867 cbp->cb_first = B_FALSE; 868 if (cbp->cb_scripted) 869 return; 870 871 /* 872 * Start with the length of the column headers. 873 */ 874 cbp->cb_colwidths[GET_COL_NAME] = strlen(gettext("NAME")); 875 cbp->cb_colwidths[GET_COL_PROPERTY] = strlen(gettext("PROPERTY")); 876 cbp->cb_colwidths[GET_COL_VALUE] = strlen(gettext("VALUE")); 877 cbp->cb_colwidths[GET_COL_SOURCE] = strlen(gettext("SOURCE")); 878 879 /* 880 * Go through and calculate the widths for each column. For the 881 * 'source' column, we kludge it up by taking the worst-case scenario of 882 * inheriting from the longest name. This is acceptable because in the 883 * majority of cases 'SOURCE' is the last column displayed, and we don't 884 * use the width anyway. Note that the 'VALUE' column can be oversized, 885 * if the name of the property is much longer the any values we find. 886 */ 887 for (pl = cbp->cb_proplist; pl != NULL; pl = pl->pl_next) { 888 /* 889 * 'PROPERTY' column 890 */ 891 if (pl->pl_prop != ZFS_PROP_INVAL) { 892 len = strlen(zfs_prop_to_name(pl->pl_prop)); 893 if (len > cbp->cb_colwidths[GET_COL_PROPERTY]) 894 cbp->cb_colwidths[GET_COL_PROPERTY] = len; 895 } else { 896 len = strlen(pl->pl_user_prop); 897 if (len > cbp->cb_colwidths[GET_COL_PROPERTY]) 898 cbp->cb_colwidths[GET_COL_PROPERTY] = len; 899 } 900 901 /* 902 * 'VALUE' column 903 */ 904 if ((pl->pl_prop != ZFS_PROP_NAME || !pl->pl_all) && 905 pl->pl_width > cbp->cb_colwidths[GET_COL_VALUE]) 906 cbp->cb_colwidths[GET_COL_VALUE] = pl->pl_width; 907 908 /* 909 * 'NAME' and 'SOURCE' columns 910 */ 911 if (pl->pl_prop == ZFS_PROP_NAME && 912 pl->pl_width > cbp->cb_colwidths[GET_COL_NAME]) { 913 cbp->cb_colwidths[GET_COL_NAME] = pl->pl_width; 914 cbp->cb_colwidths[GET_COL_SOURCE] = pl->pl_width + 915 strlen(gettext("inherited from")); 916 } 917 } 918 919 /* 920 * Now go through and print the headers. 921 */ 922 for (i = 0; i < 4; i++) { 923 switch (cbp->cb_columns[i]) { 924 case GET_COL_NAME: 925 title = gettext("NAME"); 926 break; 927 case GET_COL_PROPERTY: 928 title = gettext("PROPERTY"); 929 break; 930 case GET_COL_VALUE: 931 title = gettext("VALUE"); 932 break; 933 case GET_COL_SOURCE: 934 title = gettext("SOURCE"); 935 break; 936 default: 937 title = NULL; 938 } 939 940 if (title != NULL) { 941 if (i == 3 || cbp->cb_columns[i + 1] == 0) 942 (void) printf("%s", title); 943 else 944 (void) printf("%-*s ", 945 cbp->cb_colwidths[cbp->cb_columns[i]], 946 title); 947 } 948 } 949 (void) printf("\n"); 950 } 951 952 /* 953 * Display a single line of output, according to the settings in the callback 954 * structure. 955 */ 956 static void 957 print_one_property(zfs_handle_t *zhp, get_cbdata_t *cbp, const char *propname, 958 const char *value, zfs_source_t sourcetype, const char *source) 959 { 960 int i; 961 const char *str; 962 char buf[128]; 963 964 /* 965 * Ignore those source types that the user has chosen to ignore. 966 */ 967 if ((sourcetype & cbp->cb_sources) == 0) 968 return; 969 970 if (cbp->cb_first) 971 print_get_headers(cbp); 972 973 for (i = 0; i < 4; i++) { 974 switch (cbp->cb_columns[i]) { 975 case GET_COL_NAME: 976 str = zfs_get_name(zhp); 977 break; 978 979 case GET_COL_PROPERTY: 980 str = propname; 981 break; 982 983 case GET_COL_VALUE: 984 str = value; 985 break; 986 987 case GET_COL_SOURCE: 988 switch (sourcetype) { 989 case ZFS_SRC_NONE: 990 str = "-"; 991 break; 992 993 case ZFS_SRC_DEFAULT: 994 str = "default"; 995 break; 996 997 case ZFS_SRC_LOCAL: 998 str = "local"; 999 break; 1000 1001 case ZFS_SRC_TEMPORARY: 1002 str = "temporary"; 1003 break; 1004 1005 case ZFS_SRC_INHERITED: 1006 (void) snprintf(buf, sizeof (buf), 1007 "inherited from %s", source); 1008 str = buf; 1009 break; 1010 } 1011 break; 1012 1013 default: 1014 continue; 1015 } 1016 1017 if (cbp->cb_columns[i + 1] == 0) 1018 (void) printf("%s", str); 1019 else if (cbp->cb_scripted) 1020 (void) printf("%s\t", str); 1021 else 1022 (void) printf("%-*s ", 1023 cbp->cb_colwidths[cbp->cb_columns[i]], 1024 str); 1025 1026 } 1027 1028 (void) printf("\n"); 1029 } 1030 1031 /* 1032 * Invoked to display the properties for a single dataset. 1033 */ 1034 static int 1035 get_callback(zfs_handle_t *zhp, void *data) 1036 { 1037 char buf[ZFS_MAXPROPLEN]; 1038 zfs_source_t sourcetype; 1039 char source[ZFS_MAXNAMELEN]; 1040 get_cbdata_t *cbp = data; 1041 nvlist_t *userprop = zfs_get_user_props(zhp); 1042 zfs_proplist_t *pl = cbp->cb_proplist; 1043 nvlist_t *propval; 1044 char *strval; 1045 char *sourceval; 1046 1047 for (; pl != NULL; pl = pl->pl_next) { 1048 /* 1049 * Skip the special fake placeholder. This will also skip over 1050 * the name property when 'all' is specified. 1051 */ 1052 if (pl->pl_prop == ZFS_PROP_NAME && 1053 pl == cbp->cb_proplist) 1054 continue; 1055 1056 if (pl->pl_prop != ZFS_PROP_INVAL) { 1057 if (zfs_prop_get(zhp, pl->pl_prop, buf, 1058 sizeof (buf), &sourcetype, source, 1059 sizeof (source), 1060 cbp->cb_literal) != 0) { 1061 if (pl->pl_all) 1062 continue; 1063 sourcetype = ZFS_SRC_NONE; 1064 (void) strlcpy(buf, "-", sizeof (buf)); 1065 } 1066 1067 print_one_property(zhp, cbp, 1068 zfs_prop_to_name(pl->pl_prop), 1069 buf, sourcetype, source); 1070 } else { 1071 if (nvlist_lookup_nvlist(userprop, 1072 pl->pl_user_prop, &propval) != 0) { 1073 if (pl->pl_all) 1074 continue; 1075 sourcetype = ZFS_SRC_NONE; 1076 strval = "-"; 1077 } else { 1078 verify(nvlist_lookup_string(propval, 1079 ZFS_PROP_VALUE, &strval) == 0); 1080 verify(nvlist_lookup_string(propval, 1081 ZFS_PROP_SOURCE, &sourceval) == 0); 1082 1083 if (strcmp(sourceval, 1084 zfs_get_name(zhp)) == 0) { 1085 sourcetype = ZFS_SRC_LOCAL; 1086 } else { 1087 sourcetype = ZFS_SRC_INHERITED; 1088 (void) strlcpy(source, 1089 sourceval, sizeof (source)); 1090 } 1091 } 1092 1093 print_one_property(zhp, cbp, 1094 pl->pl_user_prop, strval, sourcetype, 1095 source); 1096 } 1097 } 1098 1099 return (0); 1100 } 1101 1102 static int 1103 zfs_do_get(int argc, char **argv) 1104 { 1105 get_cbdata_t cb = { 0 }; 1106 boolean_t recurse = B_FALSE; 1107 int i, c; 1108 char *value, *fields; 1109 int ret; 1110 zfs_proplist_t fake_name = { 0 }; 1111 1112 /* 1113 * Set up default columns and sources. 1114 */ 1115 cb.cb_sources = ZFS_SRC_ALL; 1116 cb.cb_columns[0] = GET_COL_NAME; 1117 cb.cb_columns[1] = GET_COL_PROPERTY; 1118 cb.cb_columns[2] = GET_COL_VALUE; 1119 cb.cb_columns[3] = GET_COL_SOURCE; 1120 1121 /* check options */ 1122 while ((c = getopt(argc, argv, ":o:s:rHp")) != -1) { 1123 switch (c) { 1124 case 'p': 1125 cb.cb_literal = B_TRUE; 1126 break; 1127 case 'r': 1128 recurse = B_TRUE; 1129 break; 1130 case 'H': 1131 cb.cb_scripted = B_TRUE; 1132 break; 1133 case ':': 1134 (void) fprintf(stderr, gettext("missing argument for " 1135 "'%c' option\n"), optopt); 1136 usage(B_FALSE); 1137 break; 1138 case 'o': 1139 /* 1140 * Process the set of columns to display. We zero out 1141 * the structure to give us a blank slate. 1142 */ 1143 bzero(&cb.cb_columns, sizeof (cb.cb_columns)); 1144 i = 0; 1145 while (*optarg != '\0') { 1146 static char *col_subopts[] = 1147 { "name", "property", "value", "source", 1148 NULL }; 1149 1150 if (i == 4) { 1151 (void) fprintf(stderr, gettext("too " 1152 "many fields given to -o " 1153 "option\n")); 1154 usage(B_FALSE); 1155 } 1156 1157 switch (getsubopt(&optarg, col_subopts, 1158 &value)) { 1159 case 0: 1160 cb.cb_columns[i++] = GET_COL_NAME; 1161 break; 1162 case 1: 1163 cb.cb_columns[i++] = GET_COL_PROPERTY; 1164 break; 1165 case 2: 1166 cb.cb_columns[i++] = GET_COL_VALUE; 1167 break; 1168 case 3: 1169 cb.cb_columns[i++] = GET_COL_SOURCE; 1170 break; 1171 default: 1172 (void) fprintf(stderr, 1173 gettext("invalid column name " 1174 "'%s'\n"), value); 1175 usage(B_FALSE); 1176 } 1177 } 1178 break; 1179 1180 case 's': 1181 cb.cb_sources = 0; 1182 while (*optarg != '\0') { 1183 static char *source_subopts[] = { 1184 "local", "default", "inherited", 1185 "temporary", "none", NULL }; 1186 1187 switch (getsubopt(&optarg, source_subopts, 1188 &value)) { 1189 case 0: 1190 cb.cb_sources |= ZFS_SRC_LOCAL; 1191 break; 1192 case 1: 1193 cb.cb_sources |= ZFS_SRC_DEFAULT; 1194 break; 1195 case 2: 1196 cb.cb_sources |= ZFS_SRC_INHERITED; 1197 break; 1198 case 3: 1199 cb.cb_sources |= ZFS_SRC_TEMPORARY; 1200 break; 1201 case 4: 1202 cb.cb_sources |= ZFS_SRC_NONE; 1203 break; 1204 default: 1205 (void) fprintf(stderr, 1206 gettext("invalid source " 1207 "'%s'\n"), value); 1208 usage(B_FALSE); 1209 } 1210 } 1211 break; 1212 1213 case '?': 1214 (void) fprintf(stderr, gettext("invalid option '%c'\n"), 1215 optopt); 1216 usage(B_FALSE); 1217 } 1218 } 1219 1220 argc -= optind; 1221 argv += optind; 1222 1223 if (argc < 1) { 1224 (void) fprintf(stderr, gettext("missing property " 1225 "argument\n")); 1226 usage(B_FALSE); 1227 } 1228 1229 fields = argv[0]; 1230 1231 if (zfs_get_proplist(g_zfs, fields, &cb.cb_proplist) != 0) 1232 usage(B_FALSE); 1233 1234 argc--; 1235 argv++; 1236 1237 /* 1238 * As part of zfs_expand_proplist(), we keep track of the maximum column 1239 * width for each property. For the 'NAME' (and 'SOURCE') columns, we 1240 * need to know the maximum name length. However, the user likely did 1241 * not specify 'name' as one of the properties to fetch, so we need to 1242 * make sure we always include at least this property for 1243 * print_get_headers() to work properly. 1244 */ 1245 if (cb.cb_proplist != NULL) { 1246 fake_name.pl_prop = ZFS_PROP_NAME; 1247 fake_name.pl_width = strlen(gettext("NAME")); 1248 fake_name.pl_next = cb.cb_proplist; 1249 cb.cb_proplist = &fake_name; 1250 } 1251 1252 cb.cb_first = B_TRUE; 1253 1254 /* run for each object */ 1255 ret = zfs_for_each(argc, argv, recurse, ZFS_TYPE_ANY, NULL, 1256 &cb.cb_proplist, get_callback, &cb); 1257 1258 if (cb.cb_proplist == &fake_name) 1259 zfs_free_proplist(fake_name.pl_next); 1260 else 1261 zfs_free_proplist(cb.cb_proplist); 1262 1263 return (ret); 1264 } 1265 1266 /* 1267 * inherit [-r] <property> <fs|vol> ... 1268 * 1269 * -r Recurse over all children 1270 * 1271 * For each dataset specified on the command line, inherit the given property 1272 * from its parent. Inheriting a property at the pool level will cause it to 1273 * use the default value. The '-r' flag will recurse over all children, and is 1274 * useful for setting a property on a hierarchy-wide basis, regardless of any 1275 * local modifications for each dataset. 1276 */ 1277 static int 1278 inherit_callback(zfs_handle_t *zhp, void *data) 1279 { 1280 return (zfs_prop_inherit(zhp, data) != 0); 1281 } 1282 1283 static int 1284 zfs_do_inherit(int argc, char **argv) 1285 { 1286 boolean_t recurse = B_FALSE; 1287 int c; 1288 zfs_prop_t prop; 1289 char *propname; 1290 1291 /* check options */ 1292 while ((c = getopt(argc, argv, "r")) != -1) { 1293 switch (c) { 1294 case 'r': 1295 recurse = B_TRUE; 1296 break; 1297 case '?': 1298 default: 1299 (void) fprintf(stderr, gettext("invalid option '%c'\n"), 1300 optopt); 1301 usage(B_FALSE); 1302 } 1303 } 1304 1305 argc -= optind; 1306 argv += optind; 1307 1308 /* check number of arguments */ 1309 if (argc < 1) { 1310 (void) fprintf(stderr, gettext("missing property argument\n")); 1311 usage(B_FALSE); 1312 } 1313 if (argc < 2) { 1314 (void) fprintf(stderr, gettext("missing dataset argument\n")); 1315 usage(B_FALSE); 1316 } 1317 1318 propname = argv[0]; 1319 argc--; 1320 argv++; 1321 1322 if ((prop = zfs_name_to_prop(propname)) != ZFS_PROP_INVAL) { 1323 if (zfs_prop_readonly(prop)) { 1324 (void) fprintf(stderr, gettext( 1325 "%s property is read-only\n"), 1326 propname); 1327 return (1); 1328 } 1329 if (!zfs_prop_inheritable(prop)) { 1330 (void) fprintf(stderr, gettext("'%s' property cannot " 1331 "be inherited\n"), propname); 1332 if (prop == ZFS_PROP_QUOTA || 1333 prop == ZFS_PROP_RESERVATION) 1334 (void) fprintf(stderr, gettext("use 'zfs set " 1335 "%s=none' to clear\n"), propname); 1336 return (1); 1337 } 1338 } else if (!zfs_prop_user(propname)) { 1339 (void) fprintf(stderr, gettext( 1340 "invalid property '%s'\n"), 1341 propname); 1342 usage(B_FALSE); 1343 } 1344 1345 return (zfs_for_each(argc, argv, recurse, 1346 ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME, NULL, NULL, 1347 inherit_callback, propname)); 1348 } 1349 1350 /* 1351 * list [-rH] [-o property[,property]...] [-t type[,type]...] 1352 * [-s property [-s property]...] [-S property [-S property]...] 1353 * <dataset> ... 1354 * 1355 * -r Recurse over all children 1356 * -H Scripted mode; elide headers and separate colums by tabs 1357 * -o Control which fields to display. 1358 * -t Control which object types to display. 1359 * -s Specify sort columns, descending order. 1360 * -S Specify sort columns, ascending order. 1361 * 1362 * When given no arguments, lists all filesystems in the system. 1363 * Otherwise, list the specified datasets, optionally recursing down them if 1364 * '-r' is specified. 1365 */ 1366 typedef struct list_cbdata { 1367 boolean_t cb_first; 1368 boolean_t cb_scripted; 1369 zfs_proplist_t *cb_proplist; 1370 } list_cbdata_t; 1371 1372 /* 1373 * Given a list of columns to display, output appropriate headers for each one. 1374 */ 1375 static void 1376 print_header(zfs_proplist_t *pl) 1377 { 1378 char headerbuf[ZFS_MAXPROPLEN]; 1379 const char *header; 1380 int i; 1381 boolean_t first = B_TRUE; 1382 boolean_t right_justify; 1383 1384 for (; pl != NULL; pl = pl->pl_next) { 1385 if (!first) { 1386 (void) printf(" "); 1387 } else { 1388 first = B_FALSE; 1389 } 1390 1391 right_justify = B_FALSE; 1392 if (pl->pl_prop != ZFS_PROP_INVAL) { 1393 header = zfs_prop_column_name(pl->pl_prop); 1394 right_justify = zfs_prop_align_right(pl->pl_prop); 1395 } else { 1396 for (i = 0; pl->pl_user_prop[i] != '\0'; i++) 1397 headerbuf[i] = toupper(pl->pl_user_prop[i]); 1398 headerbuf[i] = '\0'; 1399 header = headerbuf; 1400 } 1401 1402 if (pl->pl_next == NULL && !right_justify) 1403 (void) printf("%s", header); 1404 else if (right_justify) 1405 (void) printf("%*s", pl->pl_width, header); 1406 else 1407 (void) printf("%-*s", pl->pl_width, header); 1408 } 1409 1410 (void) printf("\n"); 1411 } 1412 1413 /* 1414 * Given a dataset and a list of fields, print out all the properties according 1415 * to the described layout. 1416 */ 1417 static void 1418 print_dataset(zfs_handle_t *zhp, zfs_proplist_t *pl, int scripted) 1419 { 1420 boolean_t first = B_TRUE; 1421 char property[ZFS_MAXPROPLEN]; 1422 nvlist_t *userprops = zfs_get_user_props(zhp); 1423 nvlist_t *propval; 1424 char *propstr; 1425 boolean_t right_justify; 1426 int width; 1427 1428 for (; pl != NULL; pl = pl->pl_next) { 1429 if (!first) { 1430 if (scripted) 1431 (void) printf("\t"); 1432 else 1433 (void) printf(" "); 1434 } else { 1435 first = B_FALSE; 1436 } 1437 1438 right_justify = B_FALSE; 1439 if (pl->pl_prop != ZFS_PROP_INVAL) { 1440 if (zfs_prop_get(zhp, pl->pl_prop, property, 1441 sizeof (property), NULL, NULL, 0, B_FALSE) != 0) 1442 propstr = "-"; 1443 else 1444 propstr = property; 1445 1446 right_justify = zfs_prop_align_right(pl->pl_prop); 1447 } else { 1448 if (nvlist_lookup_nvlist(userprops, 1449 pl->pl_user_prop, &propval) != 0) 1450 propstr = "-"; 1451 else 1452 verify(nvlist_lookup_string(propval, 1453 ZFS_PROP_VALUE, &propstr) == 0); 1454 } 1455 1456 width = pl->pl_width; 1457 1458 /* 1459 * If this is being called in scripted mode, or if this is the 1460 * last column and it is left-justified, don't include a width 1461 * format specifier. 1462 */ 1463 if (scripted || (pl->pl_next == NULL && !right_justify)) 1464 (void) printf("%s", propstr); 1465 else if (right_justify) 1466 (void) printf("%*s", width, propstr); 1467 else 1468 (void) printf("%-*s", width, propstr); 1469 } 1470 1471 (void) printf("\n"); 1472 } 1473 1474 /* 1475 * Generic callback function to list a dataset or snapshot. 1476 */ 1477 static int 1478 list_callback(zfs_handle_t *zhp, void *data) 1479 { 1480 list_cbdata_t *cbp = data; 1481 1482 if (cbp->cb_first) { 1483 if (!cbp->cb_scripted) 1484 print_header(cbp->cb_proplist); 1485 cbp->cb_first = B_FALSE; 1486 } 1487 1488 print_dataset(zhp, cbp->cb_proplist, cbp->cb_scripted); 1489 1490 return (0); 1491 } 1492 1493 static int 1494 zfs_do_list(int argc, char **argv) 1495 { 1496 int c; 1497 boolean_t recurse = B_FALSE; 1498 boolean_t scripted = B_FALSE; 1499 static char default_fields[] = 1500 "name,used,available,referenced,mountpoint"; 1501 int types = ZFS_TYPE_ANY; 1502 char *fields = NULL; 1503 char *basic_fields = default_fields; 1504 list_cbdata_t cb = { 0 }; 1505 char *value; 1506 int ret; 1507 char *type_subopts[] = { "filesystem", "volume", "snapshot", NULL }; 1508 zfs_sort_column_t *sortcol = NULL; 1509 1510 /* check options */ 1511 while ((c = getopt(argc, argv, ":o:rt:Hs:S:")) != -1) { 1512 switch (c) { 1513 case 'o': 1514 fields = optarg; 1515 break; 1516 case 'r': 1517 recurse = B_TRUE; 1518 break; 1519 case 'H': 1520 scripted = B_TRUE; 1521 break; 1522 case 's': 1523 if (zfs_add_sort_column(&sortcol, optarg, 1524 B_FALSE) != 0) { 1525 (void) fprintf(stderr, 1526 gettext("invalid property '%s'\n"), optarg); 1527 usage(B_FALSE); 1528 } 1529 break; 1530 case 'S': 1531 if (zfs_add_sort_column(&sortcol, optarg, 1532 B_TRUE) != 0) { 1533 (void) fprintf(stderr, 1534 gettext("invalid property '%s'\n"), optarg); 1535 usage(B_FALSE); 1536 } 1537 break; 1538 case 't': 1539 types = 0; 1540 while (*optarg != '\0') { 1541 switch (getsubopt(&optarg, type_subopts, 1542 &value)) { 1543 case 0: 1544 types |= ZFS_TYPE_FILESYSTEM; 1545 break; 1546 case 1: 1547 types |= ZFS_TYPE_VOLUME; 1548 break; 1549 case 2: 1550 types |= ZFS_TYPE_SNAPSHOT; 1551 break; 1552 default: 1553 (void) fprintf(stderr, 1554 gettext("invalid type '%s'\n"), 1555 value); 1556 usage(B_FALSE); 1557 } 1558 } 1559 break; 1560 case ':': 1561 (void) fprintf(stderr, gettext("missing argument for " 1562 "'%c' option\n"), optopt); 1563 usage(B_FALSE); 1564 break; 1565 case '?': 1566 (void) fprintf(stderr, gettext("invalid option '%c'\n"), 1567 optopt); 1568 usage(B_FALSE); 1569 } 1570 } 1571 1572 argc -= optind; 1573 argv += optind; 1574 1575 if (fields == NULL) 1576 fields = basic_fields; 1577 1578 /* 1579 * If the user specifies '-o all', the zfs_get_proplist() doesn't 1580 * normally include the name of the dataset. For 'zfs list', we always 1581 * want this property to be first. 1582 */ 1583 if (zfs_get_proplist(g_zfs, fields, &cb.cb_proplist) != 0) 1584 usage(B_FALSE); 1585 1586 cb.cb_scripted = scripted; 1587 cb.cb_first = B_TRUE; 1588 1589 ret = zfs_for_each(argc, argv, recurse, types, sortcol, &cb.cb_proplist, 1590 list_callback, &cb); 1591 1592 zfs_free_proplist(cb.cb_proplist); 1593 zfs_free_sort_columns(sortcol); 1594 1595 if (ret == 0 && cb.cb_first) 1596 (void) printf(gettext("no datasets available\n")); 1597 1598 return (ret); 1599 } 1600 1601 /* 1602 * zfs rename <fs | snap | vol> <fs | snap | vol> 1603 * 1604 * Renames the given dataset to another of the same type. 1605 */ 1606 /* ARGSUSED */ 1607 static int 1608 zfs_do_rename(int argc, char **argv) 1609 { 1610 zfs_handle_t *zhp; 1611 int ret; 1612 1613 /* check options */ 1614 if (argc > 1 && argv[1][0] == '-') { 1615 (void) fprintf(stderr, gettext("invalid option '%c'\n"), 1616 argv[1][1]); 1617 usage(B_FALSE); 1618 } 1619 1620 /* check number of arguments */ 1621 if (argc < 2) { 1622 (void) fprintf(stderr, gettext("missing source dataset " 1623 "argument\n")); 1624 usage(B_FALSE); 1625 } 1626 if (argc < 3) { 1627 (void) fprintf(stderr, gettext("missing target dataset " 1628 "argument\n")); 1629 usage(B_FALSE); 1630 } 1631 if (argc > 3) { 1632 (void) fprintf(stderr, gettext("too many arguments\n")); 1633 usage(B_FALSE); 1634 } 1635 1636 if ((zhp = zfs_open(g_zfs, argv[1], ZFS_TYPE_ANY)) == NULL) 1637 return (1); 1638 1639 ret = (zfs_rename(zhp, argv[2]) != 0); 1640 1641 zfs_close(zhp); 1642 return (ret); 1643 } 1644 1645 /* 1646 * zfs promote <fs> 1647 * 1648 * Promotes the given clone fs to be the parent 1649 */ 1650 /* ARGSUSED */ 1651 static int 1652 zfs_do_promote(int argc, char **argv) 1653 { 1654 zfs_handle_t *zhp; 1655 int ret; 1656 1657 /* check options */ 1658 if (argc > 1 && argv[1][0] == '-') { 1659 (void) fprintf(stderr, gettext("invalid option '%c'\n"), 1660 argv[1][1]); 1661 usage(B_FALSE); 1662 } 1663 1664 /* check number of arguments */ 1665 if (argc < 2) { 1666 (void) fprintf(stderr, gettext("missing clone filesystem" 1667 " argument\n")); 1668 usage(B_FALSE); 1669 } 1670 if (argc > 2) { 1671 (void) fprintf(stderr, gettext("too many arguments\n")); 1672 usage(B_FALSE); 1673 } 1674 1675 zhp = zfs_open(g_zfs, argv[1], ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME); 1676 if (zhp == NULL) 1677 return (1); 1678 1679 ret = (zfs_promote(zhp) != 0); 1680 1681 zfs_close(zhp); 1682 return (ret); 1683 } 1684 1685 /* 1686 * zfs rollback [-rfR] <snapshot> 1687 * 1688 * -r Delete any intervening snapshots before doing rollback 1689 * -R Delete any snapshots and their clones 1690 * -f Force unmount filesystems, even if they are in use. 1691 * 1692 * Given a filesystem, rollback to a specific snapshot, discarding any changes 1693 * since then and making it the active dataset. If more recent snapshots exist, 1694 * the command will complain unless the '-r' flag is given. 1695 */ 1696 typedef struct rollback_cbdata { 1697 uint64_t cb_create; 1698 boolean_t cb_first; 1699 int cb_doclones; 1700 char *cb_target; 1701 int cb_error; 1702 boolean_t cb_recurse; 1703 boolean_t cb_dependent; 1704 } rollback_cbdata_t; 1705 1706 /* 1707 * Report any snapshots more recent than the one specified. Used when '-r' is 1708 * not specified. We reuse this same callback for the snapshot dependents - if 1709 * 'cb_dependent' is set, then this is a dependent and we should report it 1710 * without checking the transaction group. 1711 */ 1712 static int 1713 rollback_check(zfs_handle_t *zhp, void *data) 1714 { 1715 rollback_cbdata_t *cbp = data; 1716 1717 if (cbp->cb_doclones) { 1718 zfs_close(zhp); 1719 return (0); 1720 } 1721 1722 if (!cbp->cb_dependent) { 1723 if (strcmp(zfs_get_name(zhp), cbp->cb_target) != 0 && 1724 zfs_get_type(zhp) == ZFS_TYPE_SNAPSHOT && 1725 zfs_prop_get_int(zhp, ZFS_PROP_CREATETXG) > 1726 cbp->cb_create) { 1727 1728 if (cbp->cb_first && !cbp->cb_recurse) { 1729 (void) fprintf(stderr, gettext("cannot " 1730 "rollback to '%s': more recent snapshots " 1731 "exist\n"), 1732 cbp->cb_target); 1733 (void) fprintf(stderr, gettext("use '-r' to " 1734 "force deletion of the following " 1735 "snapshots:\n")); 1736 cbp->cb_first = 0; 1737 cbp->cb_error = 1; 1738 } 1739 1740 if (cbp->cb_recurse) { 1741 cbp->cb_dependent = B_TRUE; 1742 if (zfs_iter_dependents(zhp, B_TRUE, 1743 rollback_check, cbp) != 0) { 1744 zfs_close(zhp); 1745 return (-1); 1746 } 1747 cbp->cb_dependent = B_FALSE; 1748 } else { 1749 (void) fprintf(stderr, "%s\n", 1750 zfs_get_name(zhp)); 1751 } 1752 } 1753 } else { 1754 if (cbp->cb_first && cbp->cb_recurse) { 1755 (void) fprintf(stderr, gettext("cannot rollback to " 1756 "'%s': clones of previous snapshots exist\n"), 1757 cbp->cb_target); 1758 (void) fprintf(stderr, gettext("use '-R' to " 1759 "force deletion of the following clones and " 1760 "dependents:\n")); 1761 cbp->cb_first = 0; 1762 cbp->cb_error = 1; 1763 } 1764 1765 (void) fprintf(stderr, "%s\n", zfs_get_name(zhp)); 1766 } 1767 1768 zfs_close(zhp); 1769 return (0); 1770 } 1771 1772 static int 1773 zfs_do_rollback(int argc, char **argv) 1774 { 1775 int ret; 1776 int c; 1777 rollback_cbdata_t cb = { 0 }; 1778 zfs_handle_t *zhp, *snap; 1779 char parentname[ZFS_MAXNAMELEN]; 1780 char *delim; 1781 int force = 0; 1782 1783 /* check options */ 1784 while ((c = getopt(argc, argv, "rfR")) != -1) { 1785 switch (c) { 1786 case 'f': 1787 force = 1; 1788 break; 1789 case 'r': 1790 cb.cb_recurse = 1; 1791 break; 1792 case 'R': 1793 cb.cb_recurse = 1; 1794 cb.cb_doclones = 1; 1795 break; 1796 case '?': 1797 (void) fprintf(stderr, gettext("invalid option '%c'\n"), 1798 optopt); 1799 usage(B_FALSE); 1800 } 1801 } 1802 1803 argc -= optind; 1804 argv += optind; 1805 1806 /* check number of arguments */ 1807 if (argc < 1) { 1808 (void) fprintf(stderr, gettext("missing dataset argument\n")); 1809 usage(B_FALSE); 1810 } 1811 if (argc > 1) { 1812 (void) fprintf(stderr, gettext("too many arguments\n")); 1813 usage(B_FALSE); 1814 } 1815 1816 /* open the snapshot */ 1817 if ((snap = zfs_open(g_zfs, argv[0], ZFS_TYPE_SNAPSHOT)) == NULL) 1818 return (1); 1819 1820 /* open the parent dataset */ 1821 (void) strlcpy(parentname, argv[0], sizeof (parentname)); 1822 verify((delim = strrchr(parentname, '@')) != NULL); 1823 *delim = '\0'; 1824 if ((zhp = zfs_open(g_zfs, parentname, ZFS_TYPE_ANY)) == NULL) { 1825 zfs_close(snap); 1826 return (1); 1827 } 1828 1829 /* 1830 * Check for more recent snapshots and/or clones based on the presence 1831 * of '-r' and '-R'. 1832 */ 1833 cb.cb_target = argv[0]; 1834 cb.cb_create = zfs_prop_get_int(snap, ZFS_PROP_CREATETXG); 1835 cb.cb_first = B_TRUE; 1836 cb.cb_error = 0; 1837 if ((ret = zfs_iter_children(zhp, rollback_check, &cb)) != 0) 1838 goto out; 1839 1840 if ((ret = cb.cb_error) != 0) 1841 goto out; 1842 1843 /* 1844 * Rollback parent to the given snapshot. 1845 */ 1846 ret = zfs_rollback(zhp, snap, force); 1847 1848 out: 1849 zfs_close(snap); 1850 zfs_close(zhp); 1851 1852 if (ret == 0) 1853 return (0); 1854 else 1855 return (1); 1856 } 1857 1858 /* 1859 * zfs set property=value { fs | snap | vol } ... 1860 * 1861 * Sets the given property for all datasets specified on the command line. 1862 */ 1863 typedef struct set_cbdata { 1864 char *cb_propname; 1865 char *cb_value; 1866 } set_cbdata_t; 1867 1868 static int 1869 set_callback(zfs_handle_t *zhp, void *data) 1870 { 1871 set_cbdata_t *cbp = data; 1872 int ret = 1; 1873 1874 if (zfs_prop_set(zhp, cbp->cb_propname, cbp->cb_value) != 0) { 1875 switch (libzfs_errno(g_zfs)) { 1876 case EZFS_MOUNTFAILED: 1877 (void) fprintf(stderr, gettext("property may be set " 1878 "but unable to remount filesystem\n")); 1879 break; 1880 case EZFS_SHAREFAILED: 1881 (void) fprintf(stderr, gettext("property may be set " 1882 "but unable to reshare filesystem\n")); 1883 break; 1884 } 1885 return (1); 1886 } 1887 ret = 0; 1888 error: 1889 return (ret); 1890 } 1891 1892 static int 1893 zfs_do_set(int argc, char **argv) 1894 { 1895 set_cbdata_t cb; 1896 1897 /* check for options */ 1898 if (argc > 1 && argv[1][0] == '-') { 1899 (void) fprintf(stderr, gettext("invalid option '%c'\n"), 1900 argv[1][1]); 1901 usage(B_FALSE); 1902 } 1903 1904 /* check number of arguments */ 1905 if (argc < 2) { 1906 (void) fprintf(stderr, gettext("missing property=value " 1907 "argument\n")); 1908 usage(B_FALSE); 1909 } 1910 if (argc < 3) { 1911 (void) fprintf(stderr, gettext("missing dataset name\n")); 1912 usage(B_FALSE); 1913 } 1914 1915 /* validate property=value argument */ 1916 cb.cb_propname = argv[1]; 1917 if ((cb.cb_value = strchr(cb.cb_propname, '=')) == NULL) { 1918 (void) fprintf(stderr, gettext("missing value in " 1919 "property=value argument\n")); 1920 usage(B_FALSE); 1921 } 1922 1923 *cb.cb_value = '\0'; 1924 cb.cb_value++; 1925 1926 if (*cb.cb_propname == '\0') { 1927 (void) fprintf(stderr, 1928 gettext("missing property in property=value argument\n")); 1929 usage(B_FALSE); 1930 } 1931 1932 return (zfs_for_each(argc - 2, argv + 2, B_FALSE, 1933 ZFS_TYPE_ANY, NULL, NULL, set_callback, &cb)); 1934 } 1935 1936 /* 1937 * zfs snapshot [-r] <fs@snap> 1938 * 1939 * Creates a snapshot with the given name. While functionally equivalent to 1940 * 'zfs create', it is a separate command to diffferentiate intent. 1941 */ 1942 static int 1943 zfs_do_snapshot(int argc, char **argv) 1944 { 1945 int recursive = B_FALSE; 1946 int ret; 1947 char c; 1948 1949 /* check options */ 1950 while ((c = getopt(argc, argv, ":r")) != -1) { 1951 switch (c) { 1952 case 'r': 1953 recursive = B_TRUE; 1954 break; 1955 case '?': 1956 (void) fprintf(stderr, gettext("invalid option '%c'\n"), 1957 optopt); 1958 usage(B_FALSE); 1959 } 1960 } 1961 1962 argc -= optind; 1963 argv += optind; 1964 1965 /* check number of arguments */ 1966 if (argc < 1) { 1967 (void) fprintf(stderr, gettext("missing snapshot argument\n")); 1968 usage(B_FALSE); 1969 } 1970 if (argc > 1) { 1971 (void) fprintf(stderr, gettext("too many arguments\n")); 1972 usage(B_FALSE); 1973 } 1974 1975 ret = zfs_snapshot(g_zfs, argv[0], recursive); 1976 if (ret && recursive) 1977 (void) fprintf(stderr, gettext("no snapshots were created\n")); 1978 return (ret != 0); 1979 1980 } 1981 1982 /* 1983 * zfs send [-i <fs@snap>] <fs@snap> 1984 * 1985 * Send a backup stream to stdout. 1986 */ 1987 static int 1988 zfs_do_send(int argc, char **argv) 1989 { 1990 char *fromname = NULL; 1991 zfs_handle_t *zhp_from = NULL, *zhp_to; 1992 int c, err; 1993 char fullname[MAXPATHLEN]; 1994 1995 /* check options */ 1996 while ((c = getopt(argc, argv, ":i:")) != -1) { 1997 switch (c) { 1998 case 'i': 1999 fromname = optarg; 2000 break; 2001 case ':': 2002 (void) fprintf(stderr, gettext("missing argument for " 2003 "'%c' option\n"), optopt); 2004 usage(B_FALSE); 2005 break; 2006 case '?': 2007 (void) fprintf(stderr, gettext("invalid option '%c'\n"), 2008 optopt); 2009 usage(B_FALSE); 2010 } 2011 } 2012 2013 argc -= optind; 2014 argv += optind; 2015 2016 /* check number of arguments */ 2017 if (argc < 1) { 2018 (void) fprintf(stderr, gettext("missing snapshot argument\n")); 2019 usage(B_FALSE); 2020 } 2021 if (argc > 1) { 2022 (void) fprintf(stderr, gettext("too many arguments\n")); 2023 usage(B_FALSE); 2024 } 2025 2026 if (isatty(STDOUT_FILENO)) { 2027 (void) fprintf(stderr, 2028 gettext("Error: Stream can not be written " 2029 "to a terminal.\n" 2030 "You must redirect standard output.\n")); 2031 return (1); 2032 } 2033 2034 if ((zhp_to = zfs_open(g_zfs, argv[0], ZFS_TYPE_SNAPSHOT)) == NULL) 2035 return (1); 2036 2037 if (fromname) { 2038 2039 /* 2040 * If fromname is an abbreviated snapshot name, 2041 * then reconstruct the name of the parent dataset 2042 */ 2043 if ((strchr(fromname, '@') == NULL) || 2044 *fromname == '@') { 2045 char *cp; 2046 cp = strchr(argv[0], '@'); 2047 if (strchr(fromname, '@') == NULL) 2048 *(++cp) = '\0'; 2049 else 2050 *cp = '\0'; 2051 (void) strncpy(fullname, argv[0], sizeof (fullname)); 2052 (void) strlcat(fullname, fromname, sizeof (fullname)); 2053 fromname = fullname; 2054 } 2055 2056 if ((zhp_from = zfs_open(g_zfs, fromname, 2057 ZFS_TYPE_SNAPSHOT)) == NULL) 2058 return (1); 2059 } 2060 2061 err = zfs_send(zhp_to, zhp_from); 2062 2063 if (zhp_from) 2064 zfs_close(zhp_from); 2065 zfs_close(zhp_to); 2066 2067 return (err != 0); 2068 } 2069 2070 /* 2071 * zfs receive <fs@snap> 2072 * 2073 * Restore a backup stream from stdin. 2074 */ 2075 static int 2076 zfs_do_receive(int argc, char **argv) 2077 { 2078 int c, err; 2079 boolean_t isprefix = B_FALSE; 2080 boolean_t dryrun = B_FALSE; 2081 boolean_t verbose = B_FALSE; 2082 boolean_t force = B_FALSE; 2083 2084 /* check options */ 2085 while ((c = getopt(argc, argv, ":dnvF")) != -1) { 2086 switch (c) { 2087 case 'd': 2088 isprefix = B_TRUE; 2089 break; 2090 case 'n': 2091 dryrun = B_TRUE; 2092 break; 2093 case 'v': 2094 verbose = B_TRUE; 2095 break; 2096 case 'F': 2097 force = B_TRUE; 2098 break; 2099 case ':': 2100 (void) fprintf(stderr, gettext("missing argument for " 2101 "'%c' option\n"), optopt); 2102 usage(B_FALSE); 2103 break; 2104 case '?': 2105 (void) fprintf(stderr, gettext("invalid option '%c'\n"), 2106 optopt); 2107 usage(B_FALSE); 2108 } 2109 } 2110 2111 argc -= optind; 2112 argv += optind; 2113 2114 /* check number of arguments */ 2115 if (argc < 1) { 2116 (void) fprintf(stderr, gettext("missing snapshot argument\n")); 2117 usage(B_FALSE); 2118 } 2119 if (argc > 1) { 2120 (void) fprintf(stderr, gettext("too many arguments\n")); 2121 usage(B_FALSE); 2122 } 2123 2124 if (isatty(STDIN_FILENO)) { 2125 (void) fprintf(stderr, 2126 gettext("Error: Backup stream can not be read " 2127 "from a terminal.\n" 2128 "You must redirect standard input.\n")); 2129 return (1); 2130 } 2131 2132 err = zfs_receive(g_zfs, argv[0], isprefix, verbose, dryrun, force); 2133 return (err != 0); 2134 } 2135 2136 typedef struct get_all_cbdata { 2137 zfs_handle_t **cb_handles; 2138 size_t cb_alloc; 2139 size_t cb_used; 2140 } get_all_cbdata_t; 2141 2142 static int 2143 get_one_filesystem(zfs_handle_t *zhp, void *data) 2144 { 2145 get_all_cbdata_t *cbp = data; 2146 2147 /* 2148 * Skip any zvols 2149 */ 2150 if (zfs_get_type(zhp) != ZFS_TYPE_FILESYSTEM) { 2151 zfs_close(zhp); 2152 return (0); 2153 } 2154 2155 if (cbp->cb_alloc == cbp->cb_used) { 2156 zfs_handle_t **handles; 2157 2158 if (cbp->cb_alloc == 0) 2159 cbp->cb_alloc = 64; 2160 else 2161 cbp->cb_alloc *= 2; 2162 2163 handles = safe_malloc(cbp->cb_alloc * sizeof (void *)); 2164 2165 if (cbp->cb_handles) { 2166 bcopy(cbp->cb_handles, handles, 2167 cbp->cb_used * sizeof (void *)); 2168 free(cbp->cb_handles); 2169 } 2170 2171 cbp->cb_handles = handles; 2172 } 2173 2174 cbp->cb_handles[cbp->cb_used++] = zhp; 2175 2176 return (zfs_iter_filesystems(zhp, get_one_filesystem, data)); 2177 } 2178 2179 static void 2180 get_all_filesystems(zfs_handle_t ***fslist, size_t *count) 2181 { 2182 get_all_cbdata_t cb = { 0 }; 2183 2184 (void) zfs_iter_root(g_zfs, get_one_filesystem, &cb); 2185 2186 *fslist = cb.cb_handles; 2187 *count = cb.cb_used; 2188 } 2189 2190 static int 2191 mountpoint_compare(const void *a, const void *b) 2192 { 2193 zfs_handle_t **za = (zfs_handle_t **)a; 2194 zfs_handle_t **zb = (zfs_handle_t **)b; 2195 char mounta[MAXPATHLEN]; 2196 char mountb[MAXPATHLEN]; 2197 2198 verify(zfs_prop_get(*za, ZFS_PROP_MOUNTPOINT, mounta, 2199 sizeof (mounta), NULL, NULL, 0, B_FALSE) == 0); 2200 verify(zfs_prop_get(*zb, ZFS_PROP_MOUNTPOINT, mountb, 2201 sizeof (mountb), NULL, NULL, 0, B_FALSE) == 0); 2202 2203 return (strcmp(mounta, mountb)); 2204 } 2205 2206 /* 2207 * Generic callback for sharing or mounting filesystems. Because the code is so 2208 * similar, we have a common function with an extra parameter to determine which 2209 * mode we are using. 2210 */ 2211 #define OP_SHARE 0x1 2212 #define OP_MOUNT 0x2 2213 2214 typedef struct share_mount_cbdata { 2215 int cb_type; 2216 int cb_explicit; 2217 int cb_flags; 2218 const char *cb_options; 2219 } share_mount_cbdata_t; 2220 2221 /* 2222 * Share or mount the filesystem. 2223 */ 2224 static int 2225 share_mount_callback(zfs_handle_t *zhp, void *data) 2226 { 2227 char mountpoint[ZFS_MAXPROPLEN]; 2228 char shareopts[ZFS_MAXPROPLEN]; 2229 share_mount_cbdata_t *cbp = data; 2230 const char *cmdname = cbp->cb_type == OP_SHARE ? "share" : "mount"; 2231 struct mnttab mnt; 2232 uint64_t zoned, canmount; 2233 2234 if (cbp->cb_options == NULL) 2235 mnt.mnt_mntopts = ""; 2236 else 2237 mnt.mnt_mntopts = (char *)cbp->cb_options; 2238 2239 /* 2240 * Check to make sure we can mount/share this dataset. If we are in the 2241 * global zone and the filesystem is exported to a local zone, or if we 2242 * are in a local zone and the filesystem is not exported, then it is an 2243 * error. 2244 */ 2245 zoned = zfs_prop_get_int(zhp, ZFS_PROP_ZONED); 2246 2247 if (zoned && getzoneid() == GLOBAL_ZONEID) { 2248 if (!cbp->cb_explicit) 2249 return (0); 2250 2251 (void) fprintf(stderr, gettext("cannot %s '%s': dataset is " 2252 "exported to a local zone\n"), cmdname, zfs_get_name(zhp)); 2253 return (1); 2254 2255 } else if (!zoned && getzoneid() != GLOBAL_ZONEID) { 2256 if (!cbp->cb_explicit) 2257 return (0); 2258 2259 (void) fprintf(stderr, gettext("cannot %s '%s': permission " 2260 "denied\n"), cmdname, zfs_get_name(zhp)); 2261 return (1); 2262 } 2263 2264 /* 2265 * Inore any filesystems which don't apply to us. This includes those 2266 * with a legacy mountpoint, or those with legacy share options. 2267 */ 2268 verify(zfs_prop_get(zhp, ZFS_PROP_MOUNTPOINT, mountpoint, 2269 sizeof (mountpoint), NULL, NULL, 0, B_FALSE) == 0); 2270 verify(zfs_prop_get(zhp, ZFS_PROP_SHARENFS, shareopts, 2271 sizeof (shareopts), NULL, NULL, 0, B_FALSE) == 0); 2272 canmount = zfs_prop_get_int(zhp, ZFS_PROP_CANMOUNT); 2273 2274 if (cbp->cb_type == OP_SHARE) { 2275 if (strcmp(shareopts, "off") == 0) { 2276 if (!cbp->cb_explicit) 2277 return (0); 2278 2279 (void) fprintf(stderr, gettext("cannot share '%s': " 2280 "legacy share\n"), zfs_get_name(zhp)); 2281 (void) fprintf(stderr, gettext("use share(1M) to " 2282 "share this filesystem\n")); 2283 return (1); 2284 } 2285 } 2286 2287 /* 2288 * We cannot share or mount legacy filesystems. If the shareopts is 2289 * non-legacy but the mountpoint is legacy, we treat it as a legacy 2290 * share. 2291 */ 2292 if (strcmp(mountpoint, "legacy") == 0) { 2293 if (!cbp->cb_explicit) 2294 return (0); 2295 2296 (void) fprintf(stderr, gettext("cannot %s '%s': " 2297 "legacy mountpoint\n"), cmdname, zfs_get_name(zhp)); 2298 (void) fprintf(stderr, gettext("use %s to " 2299 "%s this filesystem\n"), cbp->cb_type == OP_SHARE ? 2300 "share(1M)" : "mount(1M)", cmdname); 2301 return (1); 2302 } 2303 2304 if (strcmp(mountpoint, "none") == 0) { 2305 if (!cbp->cb_explicit) 2306 return (0); 2307 2308 (void) fprintf(stderr, gettext("cannot %s '%s': no " 2309 "mountpoint set\n"), cmdname, zfs_get_name(zhp)); 2310 return (1); 2311 } 2312 2313 if (!canmount) { 2314 if (!cbp->cb_explicit) 2315 return (0); 2316 2317 (void) fprintf(stderr, gettext("cannot %s '%s': 'canmount' " 2318 "property is set to 'off'\n"), cmdname, zfs_get_name(zhp)); 2319 return (1); 2320 } 2321 2322 /* 2323 * At this point, we have verified that the mountpoint and/or shareopts 2324 * are appropriate for auto management. Determine if the filesystem is 2325 * currently mounted or shared, and abort if this is an explicit 2326 * request. 2327 */ 2328 switch (cbp->cb_type) { 2329 case OP_SHARE: 2330 if (zfs_is_shared(zhp, NULL)) { 2331 if (cbp->cb_explicit) { 2332 (void) fprintf(stderr, gettext("cannot share " 2333 "'%s': filesystem already shared\n"), 2334 zfs_get_name(zhp)); 2335 return (1); 2336 } else { 2337 return (0); 2338 } 2339 } 2340 break; 2341 2342 case OP_MOUNT: 2343 if (!hasmntopt(&mnt, MNTOPT_REMOUNT) && 2344 zfs_is_mounted(zhp, NULL)) { 2345 if (cbp->cb_explicit) { 2346 (void) fprintf(stderr, gettext("cannot mount " 2347 "'%s': filesystem already mounted\n"), 2348 zfs_get_name(zhp)); 2349 return (1); 2350 } else { 2351 return (0); 2352 } 2353 } 2354 break; 2355 } 2356 2357 /* 2358 * Mount and optionally share the filesystem. 2359 */ 2360 switch (cbp->cb_type) { 2361 case OP_SHARE: 2362 { 2363 if (!zfs_is_mounted(zhp, NULL) && 2364 zfs_mount(zhp, NULL, 0) != 0) 2365 return (1); 2366 2367 if (zfs_share(zhp) != 0) 2368 return (1); 2369 } 2370 break; 2371 2372 case OP_MOUNT: 2373 if (zfs_mount(zhp, cbp->cb_options, cbp->cb_flags) != 0) 2374 return (1); 2375 break; 2376 } 2377 2378 return (0); 2379 } 2380 2381 static int 2382 share_or_mount(int type, int argc, char **argv) 2383 { 2384 int do_all = 0; 2385 int c, ret = 0; 2386 share_mount_cbdata_t cb = { 0 }; 2387 2388 cb.cb_type = type; 2389 2390 /* check options */ 2391 while ((c = getopt(argc, argv, type == OP_MOUNT ? ":ao:O" : "a")) 2392 != -1) { 2393 switch (c) { 2394 case 'a': 2395 do_all = 1; 2396 break; 2397 case 'o': 2398 cb.cb_options = optarg; 2399 break; 2400 case 'O': 2401 cb.cb_flags |= MS_OVERLAY; 2402 break; 2403 case ':': 2404 (void) fprintf(stderr, gettext("missing argument for " 2405 "'%c' option\n"), optopt); 2406 usage(B_FALSE); 2407 break; 2408 case '?': 2409 (void) fprintf(stderr, gettext("invalid option '%c'\n"), 2410 optopt); 2411 usage(B_FALSE); 2412 } 2413 } 2414 2415 argc -= optind; 2416 argv += optind; 2417 2418 /* check number of arguments */ 2419 if (do_all) { 2420 zfs_handle_t **fslist = NULL; 2421 size_t i, count = 0; 2422 2423 if (argc != 0) { 2424 (void) fprintf(stderr, gettext("too many arguments\n")); 2425 usage(B_FALSE); 2426 } 2427 2428 get_all_filesystems(&fslist, &count); 2429 2430 if (count == 0) 2431 return (0); 2432 2433 qsort(fslist, count, sizeof (void *), mountpoint_compare); 2434 2435 for (i = 0; i < count; i++) { 2436 if (share_mount_callback(fslist[i], &cb) != 0) 2437 ret = 1; 2438 } 2439 2440 for (i = 0; i < count; i++) 2441 zfs_close(fslist[i]); 2442 2443 free(fslist); 2444 } else if (argc == 0) { 2445 struct mnttab entry; 2446 2447 if (type == OP_SHARE) { 2448 (void) fprintf(stderr, gettext("missing filesystem " 2449 "argument\n")); 2450 usage(B_FALSE); 2451 } 2452 2453 /* 2454 * When mount is given no arguments, go through /etc/mnttab and 2455 * display any active ZFS mounts. We hide any snapshots, since 2456 * they are controlled automatically. 2457 */ 2458 rewind(mnttab_file); 2459 while (getmntent(mnttab_file, &entry) == 0) { 2460 if (strcmp(entry.mnt_fstype, MNTTYPE_ZFS) != 0 || 2461 strchr(entry.mnt_special, '@') != NULL) 2462 continue; 2463 2464 (void) printf("%-30s %s\n", entry.mnt_special, 2465 entry.mnt_mountp); 2466 } 2467 2468 } else { 2469 zfs_handle_t *zhp; 2470 2471 if (argc > 1) { 2472 (void) fprintf(stderr, 2473 gettext("too many arguments\n")); 2474 usage(B_FALSE); 2475 } 2476 2477 if ((zhp = zfs_open(g_zfs, argv[0], 2478 ZFS_TYPE_FILESYSTEM)) == NULL) 2479 ret = 1; 2480 else { 2481 cb.cb_explicit = B_TRUE; 2482 ret = share_mount_callback(zhp, &cb); 2483 zfs_close(zhp); 2484 } 2485 } 2486 2487 return (ret); 2488 } 2489 2490 /* 2491 * zfs mount -a 2492 * zfs mount filesystem 2493 * 2494 * Mount all filesystems, or mount the given filesystem. 2495 */ 2496 static int 2497 zfs_do_mount(int argc, char **argv) 2498 { 2499 return (share_or_mount(OP_MOUNT, argc, argv)); 2500 } 2501 2502 /* 2503 * zfs share -a 2504 * zfs share filesystem 2505 * 2506 * Share all filesystems, or share the given filesystem. 2507 */ 2508 static int 2509 zfs_do_share(int argc, char **argv) 2510 { 2511 return (share_or_mount(OP_SHARE, argc, argv)); 2512 } 2513 2514 typedef struct unshare_unmount_node { 2515 zfs_handle_t *un_zhp; 2516 char *un_mountp; 2517 uu_avl_node_t un_avlnode; 2518 } unshare_unmount_node_t; 2519 2520 /* ARGSUSED */ 2521 static int 2522 unshare_unmount_compare(const void *larg, const void *rarg, void *unused) 2523 { 2524 const unshare_unmount_node_t *l = larg; 2525 const unshare_unmount_node_t *r = rarg; 2526 2527 return (strcmp(l->un_mountp, r->un_mountp)); 2528 } 2529 2530 /* 2531 * Convenience routine used by zfs_do_umount() and manual_unmount(). Given an 2532 * absolute path, find the entry /etc/mnttab, verify that its a ZFS filesystem, 2533 * and unmount it appropriately. 2534 */ 2535 static int 2536 unshare_unmount_path(int type, char *path, int flags, boolean_t is_manual) 2537 { 2538 zfs_handle_t *zhp; 2539 int ret; 2540 struct stat64 statbuf; 2541 struct extmnttab entry; 2542 const char *cmdname = (type == OP_SHARE) ? "unshare" : "unmount"; 2543 char property[ZFS_MAXPROPLEN]; 2544 2545 /* 2546 * Search for the path in /etc/mnttab. Rather than looking for the 2547 * specific path, which can be fooled by non-standard paths (i.e. ".." 2548 * or "//"), we stat() the path and search for the corresponding 2549 * (major,minor) device pair. 2550 */ 2551 if (stat64(path, &statbuf) != 0) { 2552 (void) fprintf(stderr, gettext("cannot %s '%s': %s\n"), 2553 cmdname, path, strerror(errno)); 2554 return (1); 2555 } 2556 2557 /* 2558 * Search for the given (major,minor) pair in the mount table. 2559 */ 2560 rewind(mnttab_file); 2561 while ((ret = getextmntent(mnttab_file, &entry, 0)) == 0) { 2562 if (entry.mnt_major == major(statbuf.st_dev) && 2563 entry.mnt_minor == minor(statbuf.st_dev)) 2564 break; 2565 } 2566 if (ret != 0) { 2567 (void) fprintf(stderr, gettext("cannot %s '%s': not " 2568 "currently mounted\n"), cmdname, path); 2569 return (1); 2570 } 2571 2572 if (strcmp(entry.mnt_fstype, MNTTYPE_ZFS) != 0) { 2573 (void) fprintf(stderr, gettext("cannot %s '%s': not a ZFS " 2574 "filesystem\n"), cmdname, path); 2575 return (1); 2576 } 2577 2578 if ((zhp = zfs_open(g_zfs, entry.mnt_special, 2579 ZFS_TYPE_FILESYSTEM)) == NULL) 2580 return (1); 2581 2582 verify(zfs_prop_get(zhp, type == OP_SHARE ? 2583 ZFS_PROP_SHARENFS : ZFS_PROP_MOUNTPOINT, property, 2584 sizeof (property), NULL, NULL, 0, B_FALSE) == 0); 2585 2586 if (type == OP_SHARE) { 2587 if (strcmp(property, "off") == 0) { 2588 (void) fprintf(stderr, gettext("cannot unshare " 2589 "'%s': legacy share\n"), path); 2590 (void) fprintf(stderr, gettext("use " 2591 "unshare(1M) to unshare this filesystem\n")); 2592 ret = 1; 2593 } else if (!zfs_is_shared(zhp, NULL)) { 2594 (void) fprintf(stderr, gettext("cannot unshare '%s': " 2595 "not currently shared\n"), path); 2596 ret = 1; 2597 } else { 2598 ret = zfs_unshareall(zhp); 2599 } 2600 } else { 2601 if (is_manual) { 2602 ret = zfs_unmount(zhp, NULL, flags); 2603 } else if (strcmp(property, "legacy") == 0) { 2604 (void) fprintf(stderr, gettext("cannot unmount " 2605 "'%s': legacy mountpoint\n"), 2606 zfs_get_name(zhp)); 2607 (void) fprintf(stderr, gettext("use umount(1M) " 2608 "to unmount this filesystem\n")); 2609 ret = 1; 2610 } else { 2611 ret = zfs_unmountall(zhp, flags); 2612 } 2613 } 2614 2615 zfs_close(zhp); 2616 2617 return (ret != 0); 2618 } 2619 2620 /* 2621 * Generic callback for unsharing or unmounting a filesystem. 2622 */ 2623 static int 2624 unshare_unmount(int type, int argc, char **argv) 2625 { 2626 int do_all = 0; 2627 int flags = 0; 2628 int ret = 0; 2629 int c; 2630 zfs_handle_t *zhp; 2631 char property[ZFS_MAXPROPLEN]; 2632 2633 /* check options */ 2634 while ((c = getopt(argc, argv, type == OP_SHARE ? "a" : "af")) != -1) { 2635 switch (c) { 2636 case 'a': 2637 do_all = 1; 2638 break; 2639 case 'f': 2640 flags = MS_FORCE; 2641 break; 2642 case '?': 2643 (void) fprintf(stderr, gettext("invalid option '%c'\n"), 2644 optopt); 2645 usage(B_FALSE); 2646 } 2647 } 2648 2649 argc -= optind; 2650 argv += optind; 2651 2652 /* ensure correct number of arguments */ 2653 if (do_all) { 2654 if (argc != 0) { 2655 (void) fprintf(stderr, gettext("too many arguments\n")); 2656 usage(B_FALSE); 2657 } 2658 } else if (argc != 1) { 2659 if (argc == 0) 2660 (void) fprintf(stderr, 2661 gettext("missing filesystem argument\n")); 2662 else 2663 (void) fprintf(stderr, 2664 gettext("too many arguments\n")); 2665 usage(B_FALSE); 2666 } 2667 2668 if (do_all) { 2669 /* 2670 * We could make use of zfs_for_each() to walk all datasets in 2671 * the system, but this would be very inefficient, especially 2672 * since we would have to linearly search /etc/mnttab for each 2673 * one. Instead, do one pass through /etc/mnttab looking for 2674 * zfs entries and call zfs_unmount() for each one. 2675 * 2676 * Things get a little tricky if the administrator has created 2677 * mountpoints beneath other ZFS filesystems. In this case, we 2678 * have to unmount the deepest filesystems first. To accomplish 2679 * this, we place all the mountpoints in an AVL tree sorted by 2680 * the special type (dataset name), and walk the result in 2681 * reverse to make sure to get any snapshots first. 2682 */ 2683 struct mnttab entry; 2684 uu_avl_pool_t *pool; 2685 uu_avl_t *tree; 2686 unshare_unmount_node_t *node; 2687 uu_avl_index_t idx; 2688 uu_avl_walk_t *walk; 2689 2690 if ((pool = uu_avl_pool_create("unmount_pool", 2691 sizeof (unshare_unmount_node_t), 2692 offsetof(unshare_unmount_node_t, un_avlnode), 2693 unshare_unmount_compare, 2694 UU_DEFAULT)) == NULL) { 2695 (void) fprintf(stderr, gettext("internal error: " 2696 "out of memory\n")); 2697 exit(1); 2698 } 2699 2700 if ((tree = uu_avl_create(pool, NULL, UU_DEFAULT)) == NULL) { 2701 (void) fprintf(stderr, gettext("internal error: " 2702 "out of memory\n")); 2703 exit(1); 2704 } 2705 2706 rewind(mnttab_file); 2707 while (getmntent(mnttab_file, &entry) == 0) { 2708 2709 /* ignore non-ZFS entries */ 2710 if (strcmp(entry.mnt_fstype, MNTTYPE_ZFS) != 0) 2711 continue; 2712 2713 /* ignore snapshots */ 2714 if (strchr(entry.mnt_special, '@') != NULL) 2715 continue; 2716 2717 if ((zhp = zfs_open(g_zfs, entry.mnt_special, 2718 ZFS_TYPE_FILESYSTEM)) == NULL) { 2719 ret = 1; 2720 continue; 2721 } 2722 2723 verify(zfs_prop_get(zhp, type == OP_SHARE ? 2724 ZFS_PROP_SHARENFS : ZFS_PROP_MOUNTPOINT, 2725 property, sizeof (property), NULL, NULL, 2726 0, B_FALSE) == 0); 2727 2728 /* Ignore legacy mounts and shares */ 2729 if ((type == OP_SHARE && 2730 strcmp(property, "off") == 0) || 2731 (type == OP_MOUNT && 2732 strcmp(property, "legacy") == 0)) { 2733 zfs_close(zhp); 2734 continue; 2735 } 2736 2737 node = safe_malloc(sizeof (unshare_unmount_node_t)); 2738 node->un_zhp = zhp; 2739 2740 if ((node->un_mountp = strdup(entry.mnt_mountp)) == 2741 NULL) { 2742 (void) fprintf(stderr, gettext("internal error:" 2743 " out of memory\n")); 2744 exit(1); 2745 } 2746 2747 uu_avl_node_init(node, &node->un_avlnode, pool); 2748 2749 if (uu_avl_find(tree, node, NULL, &idx) == NULL) { 2750 uu_avl_insert(tree, node, idx); 2751 } else { 2752 zfs_close(node->un_zhp); 2753 free(node->un_mountp); 2754 free(node); 2755 } 2756 } 2757 2758 /* 2759 * Walk the AVL tree in reverse, unmounting each filesystem and 2760 * removing it from the AVL tree in the process. 2761 */ 2762 if ((walk = uu_avl_walk_start(tree, 2763 UU_WALK_REVERSE | UU_WALK_ROBUST)) == NULL) { 2764 (void) fprintf(stderr, 2765 gettext("internal error: out of memory")); 2766 exit(1); 2767 } 2768 2769 while ((node = uu_avl_walk_next(walk)) != NULL) { 2770 uu_avl_remove(tree, node); 2771 2772 switch (type) { 2773 case OP_SHARE: 2774 if (zfs_unshare(node->un_zhp, 2775 node->un_mountp) != 0) 2776 ret = 1; 2777 break; 2778 2779 case OP_MOUNT: 2780 if (zfs_unmount(node->un_zhp, 2781 node->un_mountp, flags) != 0) 2782 ret = 1; 2783 break; 2784 } 2785 2786 zfs_close(node->un_zhp); 2787 free(node->un_mountp); 2788 free(node); 2789 } 2790 2791 uu_avl_walk_end(walk); 2792 uu_avl_destroy(tree); 2793 uu_avl_pool_destroy(pool); 2794 } else { 2795 /* 2796 * We have an argument, but it may be a full path or a ZFS 2797 * filesystem. Pass full paths off to unmount_path() (shared by 2798 * manual_unmount), otherwise open the filesystem and pass to 2799 * zfs_unmount(). 2800 */ 2801 if (argv[0][0] == '/') 2802 return (unshare_unmount_path(type, argv[0], 2803 flags, B_FALSE)); 2804 2805 if ((zhp = zfs_open(g_zfs, argv[0], 2806 ZFS_TYPE_FILESYSTEM)) == NULL) 2807 return (1); 2808 2809 verify(zfs_prop_get(zhp, type == OP_SHARE ? 2810 ZFS_PROP_SHARENFS : ZFS_PROP_MOUNTPOINT, property, 2811 sizeof (property), NULL, NULL, 0, B_FALSE) == 0); 2812 2813 switch (type) { 2814 case OP_SHARE: 2815 if (strcmp(property, "off") == 0) { 2816 (void) fprintf(stderr, gettext("cannot unshare " 2817 "'%s': legacy share\n"), zfs_get_name(zhp)); 2818 (void) fprintf(stderr, gettext("use unshare(1M)" 2819 " to unshare this filesystem\n")); 2820 ret = 1; 2821 } else if (!zfs_is_shared(zhp, NULL)) { 2822 (void) fprintf(stderr, gettext("cannot unshare " 2823 "'%s': not currently shared\n"), 2824 zfs_get_name(zhp)); 2825 ret = 1; 2826 } else if (zfs_unshareall(zhp) != 0) { 2827 ret = 1; 2828 } 2829 break; 2830 2831 case OP_MOUNT: 2832 if (strcmp(property, "legacy") == 0) { 2833 (void) fprintf(stderr, gettext("cannot unmount " 2834 "'%s': legacy mountpoint\n"), 2835 zfs_get_name(zhp)); 2836 (void) fprintf(stderr, gettext("use umount(1M) " 2837 "to unmount this filesystem\n")); 2838 ret = 1; 2839 } else if (!zfs_is_mounted(zhp, NULL)) { 2840 (void) fprintf(stderr, gettext("cannot unmount " 2841 "'%s': not currently mounted\n"), 2842 zfs_get_name(zhp)); 2843 ret = 1; 2844 } else if (zfs_unmountall(zhp, flags) != 0) { 2845 ret = 1; 2846 } 2847 } 2848 2849 zfs_close(zhp); 2850 } 2851 2852 return (ret); 2853 } 2854 2855 /* 2856 * zfs unmount -a 2857 * zfs unmount filesystem 2858 * 2859 * Unmount all filesystems, or a specific ZFS filesystem. 2860 */ 2861 static int 2862 zfs_do_unmount(int argc, char **argv) 2863 { 2864 return (unshare_unmount(OP_MOUNT, argc, argv)); 2865 } 2866 2867 /* 2868 * zfs unshare -a 2869 * zfs unshare filesystem 2870 * 2871 * Unshare all filesystems, or a specific ZFS filesystem. 2872 */ 2873 static int 2874 zfs_do_unshare(int argc, char **argv) 2875 { 2876 return (unshare_unmount(OP_SHARE, argc, argv)); 2877 } 2878 2879 /* 2880 * Called when invoked as /etc/fs/zfs/mount. Do the mount if the mountpoint is 2881 * 'legacy'. Otherwise, complain that use should be using 'zfs mount'. 2882 */ 2883 static int 2884 manual_mount(int argc, char **argv) 2885 { 2886 zfs_handle_t *zhp; 2887 char mountpoint[ZFS_MAXPROPLEN]; 2888 char mntopts[MNT_LINE_MAX] = { '\0' }; 2889 int ret; 2890 int c; 2891 int flags = 0; 2892 char *dataset, *path; 2893 2894 /* check options */ 2895 while ((c = getopt(argc, argv, ":mo:O")) != -1) { 2896 switch (c) { 2897 case 'o': 2898 (void) strlcpy(mntopts, optarg, sizeof (mntopts)); 2899 break; 2900 case 'O': 2901 flags |= MS_OVERLAY; 2902 break; 2903 case 'm': 2904 flags |= MS_NOMNTTAB; 2905 break; 2906 case ':': 2907 (void) fprintf(stderr, gettext("missing argument for " 2908 "'%c' option\n"), optopt); 2909 usage(B_FALSE); 2910 break; 2911 case '?': 2912 (void) fprintf(stderr, gettext("invalid option '%c'\n"), 2913 optopt); 2914 (void) fprintf(stderr, gettext("usage: mount [-o opts] " 2915 "<path>\n")); 2916 return (2); 2917 } 2918 } 2919 2920 argc -= optind; 2921 argv += optind; 2922 2923 /* check that we only have two arguments */ 2924 if (argc != 2) { 2925 if (argc == 0) 2926 (void) fprintf(stderr, gettext("missing dataset " 2927 "argument\n")); 2928 else if (argc == 1) 2929 (void) fprintf(stderr, 2930 gettext("missing mountpoint argument\n")); 2931 else 2932 (void) fprintf(stderr, gettext("too many arguments\n")); 2933 (void) fprintf(stderr, "usage: mount <dataset> <mountpoint>\n"); 2934 return (2); 2935 } 2936 2937 dataset = argv[0]; 2938 path = argv[1]; 2939 2940 /* try to open the dataset */ 2941 if ((zhp = zfs_open(g_zfs, dataset, ZFS_TYPE_FILESYSTEM)) == NULL) 2942 return (1); 2943 2944 (void) zfs_prop_get(zhp, ZFS_PROP_MOUNTPOINT, mountpoint, 2945 sizeof (mountpoint), NULL, NULL, 0, B_FALSE); 2946 2947 /* check for legacy mountpoint and complain appropriately */ 2948 ret = 0; 2949 if (strcmp(mountpoint, ZFS_MOUNTPOINT_LEGACY) == 0) { 2950 if (mount(dataset, path, MS_OPTIONSTR | flags, MNTTYPE_ZFS, 2951 NULL, 0, mntopts, sizeof (mntopts)) != 0) { 2952 (void) fprintf(stderr, gettext("mount failed: %s\n"), 2953 strerror(errno)); 2954 ret = 1; 2955 } 2956 } else { 2957 (void) fprintf(stderr, gettext("filesystem '%s' cannot be " 2958 "mounted using 'mount -F zfs'\n"), dataset); 2959 (void) fprintf(stderr, gettext("Use 'zfs set mountpoint=%s' " 2960 "instead.\n"), path); 2961 (void) fprintf(stderr, gettext("If you must use 'mount -F zfs' " 2962 "or /etc/vfstab, use 'zfs set mountpoint=legacy'.\n")); 2963 (void) fprintf(stderr, gettext("See zfs(1M) for more " 2964 "information.\n")); 2965 ret = 1; 2966 } 2967 2968 return (ret); 2969 } 2970 2971 /* 2972 * Called when invoked as /etc/fs/zfs/umount. Unlike a manual mount, we allow 2973 * unmounts of non-legacy filesystems, as this is the dominant administrative 2974 * interface. 2975 */ 2976 static int 2977 manual_unmount(int argc, char **argv) 2978 { 2979 int flags = 0; 2980 int c; 2981 2982 /* check options */ 2983 while ((c = getopt(argc, argv, "f")) != -1) { 2984 switch (c) { 2985 case 'f': 2986 flags = MS_FORCE; 2987 break; 2988 case '?': 2989 (void) fprintf(stderr, gettext("invalid option '%c'\n"), 2990 optopt); 2991 (void) fprintf(stderr, gettext("usage: unmount [-f] " 2992 "<path>\n")); 2993 return (2); 2994 } 2995 } 2996 2997 argc -= optind; 2998 argv += optind; 2999 3000 /* check arguments */ 3001 if (argc != 1) { 3002 if (argc == 0) 3003 (void) fprintf(stderr, gettext("missing path " 3004 "argument\n")); 3005 else 3006 (void) fprintf(stderr, gettext("too many arguments\n")); 3007 (void) fprintf(stderr, gettext("usage: unmount [-f] <path>\n")); 3008 return (2); 3009 } 3010 3011 return (unshare_unmount_path(OP_MOUNT, argv[0], flags, B_TRUE)); 3012 } 3013 3014 static int 3015 volcheck(zpool_handle_t *zhp, void *data) 3016 { 3017 int isinit = (int)data; 3018 3019 if (isinit) 3020 return (zpool_create_zvol_links(zhp)); 3021 else 3022 return (zpool_remove_zvol_links(zhp)); 3023 } 3024 3025 /* 3026 * Iterate over all pools in the system and either create or destroy /dev/zvol 3027 * links, depending on the value of 'isinit'. 3028 */ 3029 static int 3030 do_volcheck(boolean_t isinit) 3031 { 3032 return (zpool_iter(g_zfs, volcheck, (void *)isinit) ? 1 : 0); 3033 } 3034 3035 int 3036 main(int argc, char **argv) 3037 { 3038 int ret; 3039 int i; 3040 char *progname; 3041 char *cmdname; 3042 3043 (void) setlocale(LC_ALL, ""); 3044 (void) textdomain(TEXT_DOMAIN); 3045 3046 opterr = 0; 3047 3048 if ((g_zfs = libzfs_init()) == NULL) { 3049 (void) fprintf(stderr, gettext("internal error: failed to " 3050 "initialize ZFS library\n")); 3051 return (1); 3052 } 3053 3054 libzfs_print_on_error(g_zfs, B_TRUE); 3055 3056 if ((mnttab_file = fopen(MNTTAB, "r")) == NULL) { 3057 (void) fprintf(stderr, gettext("internal error: unable to " 3058 "open %s\n"), MNTTAB); 3059 return (1); 3060 } 3061 3062 /* 3063 * This command also doubles as the /etc/fs mount and unmount program. 3064 * Determine if we should take this behavior based on argv[0]. 3065 */ 3066 progname = basename(argv[0]); 3067 if (strcmp(progname, "mount") == 0) { 3068 ret = manual_mount(argc, argv); 3069 } else if (strcmp(progname, "umount") == 0) { 3070 ret = manual_unmount(argc, argv); 3071 } else { 3072 /* 3073 * Make sure the user has specified some command. 3074 */ 3075 if (argc < 2) { 3076 (void) fprintf(stderr, gettext("missing command\n")); 3077 usage(B_FALSE); 3078 } 3079 3080 cmdname = argv[1]; 3081 3082 /* 3083 * The 'umount' command is an alias for 'unmount' 3084 */ 3085 if (strcmp(cmdname, "umount") == 0) 3086 cmdname = "unmount"; 3087 3088 /* 3089 * The 'recv' command is an alias for 'receive' 3090 */ 3091 if (strcmp(cmdname, "recv") == 0) 3092 cmdname = "receive"; 3093 3094 /* 3095 * Special case '-?' 3096 */ 3097 if (strcmp(cmdname, "-?") == 0) 3098 usage(B_TRUE); 3099 3100 /* 3101 * 'volinit' and 'volfini' do not appear in the usage message, 3102 * so we have to special case them here. 3103 */ 3104 if (strcmp(cmdname, "volinit") == 0) 3105 return (do_volcheck(B_TRUE)); 3106 else if (strcmp(cmdname, "volfini") == 0) 3107 return (do_volcheck(B_FALSE)); 3108 3109 /* 3110 * Run the appropriate command. 3111 */ 3112 for (i = 0; i < NCOMMAND; i++) { 3113 if (command_table[i].name == NULL) 3114 continue; 3115 3116 if (strcmp(cmdname, command_table[i].name) == 0) { 3117 current_command = &command_table[i]; 3118 ret = command_table[i].func(argc - 1, argv + 1); 3119 break; 3120 } 3121 } 3122 3123 if (i == NCOMMAND) { 3124 (void) fprintf(stderr, gettext("unrecognized " 3125 "command '%s'\n"), cmdname); 3126 usage(B_FALSE); 3127 } 3128 } 3129 3130 (void) fclose(mnttab_file); 3131 3132 libzfs_fini(g_zfs); 3133 3134 /* 3135 * The 'ZFS_ABORT' environment variable causes us to dump core on exit 3136 * for the purposes of running ::findleaks. 3137 */ 3138 if (getenv("ZFS_ABORT") != NULL) { 3139 (void) printf("dumping core by request\n"); 3140 abort(); 3141 } 3142 3143 return (ret); 3144 } 3145