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 /* 23 * Copyright 2007 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 #pragma ident "%Z%%M% %I% %E% SMI" 28 29 #include <assert.h> 30 #include <ctype.h> 31 #include <errno.h> 32 #include <libgen.h> 33 #include <libintl.h> 34 #include <libuutil.h> 35 #include <locale.h> 36 #include <stddef.h> 37 #include <stdio.h> 38 #include <stdlib.h> 39 #include <strings.h> 40 #include <unistd.h> 41 #include <fcntl.h> 42 #include <zone.h> 43 #include <sys/mkdev.h> 44 #include <sys/mntent.h> 45 #include <sys/mnttab.h> 46 #include <sys/mount.h> 47 #include <sys/stat.h> 48 49 #include <libzfs.h> 50 51 #include "zfs_iter.h" 52 #include "zfs_util.h" 53 54 libzfs_handle_t *g_zfs; 55 56 static FILE *mnttab_file; 57 58 static int zfs_do_clone(int argc, char **argv); 59 static int zfs_do_create(int argc, char **argv); 60 static int zfs_do_destroy(int argc, char **argv); 61 static int zfs_do_get(int argc, char **argv); 62 static int zfs_do_inherit(int argc, char **argv); 63 static int zfs_do_list(int argc, char **argv); 64 static int zfs_do_mount(int argc, char **argv); 65 static int zfs_do_rename(int argc, char **argv); 66 static int zfs_do_rollback(int argc, char **argv); 67 static int zfs_do_set(int argc, char **argv); 68 static int zfs_do_snapshot(int argc, char **argv); 69 static int zfs_do_unmount(int argc, char **argv); 70 static int zfs_do_share(int argc, char **argv); 71 static int zfs_do_unshare(int argc, char **argv); 72 static int zfs_do_send(int argc, char **argv); 73 static int zfs_do_receive(int argc, char **argv); 74 static int zfs_do_promote(int argc, char **argv); 75 76 /* 77 * These libumem hooks provide a reasonable set of defaults for the allocator's 78 * debugging facilities. 79 */ 80 const char * 81 _umem_debug_init(void) 82 { 83 return ("default,verbose"); /* $UMEM_DEBUG setting */ 84 } 85 86 const char * 87 _umem_logging_init(void) 88 { 89 return ("fail,contents"); /* $UMEM_LOGGING setting */ 90 } 91 92 typedef enum { 93 HELP_CLONE, 94 HELP_CREATE, 95 HELP_DESTROY, 96 HELP_GET, 97 HELP_INHERIT, 98 HELP_LIST, 99 HELP_MOUNT, 100 HELP_PROMOTE, 101 HELP_RECEIVE, 102 HELP_RENAME, 103 HELP_ROLLBACK, 104 HELP_SEND, 105 HELP_SET, 106 HELP_SHARE, 107 HELP_SNAPSHOT, 108 HELP_UNMOUNT, 109 HELP_UNSHARE 110 } zfs_help_t; 111 112 typedef struct zfs_command { 113 const char *name; 114 int (*func)(int argc, char **argv); 115 zfs_help_t usage; 116 } zfs_command_t; 117 118 /* 119 * Master command table. Each ZFS command has a name, associated function, and 120 * usage message. The usage messages need to be internationalized, so we have 121 * to have a function to return the usage message based on a command index. 122 * 123 * These commands are organized according to how they are displayed in the usage 124 * message. An empty command (one with a NULL name) indicates an empty line in 125 * the generic usage message. 126 */ 127 static zfs_command_t command_table[] = { 128 { "create", zfs_do_create, HELP_CREATE }, 129 { "destroy", zfs_do_destroy, HELP_DESTROY }, 130 { NULL }, 131 { "snapshot", zfs_do_snapshot, HELP_SNAPSHOT }, 132 { "rollback", zfs_do_rollback, HELP_ROLLBACK }, 133 { "clone", zfs_do_clone, HELP_CLONE }, 134 { "promote", zfs_do_promote, HELP_PROMOTE }, 135 { "rename", zfs_do_rename, HELP_RENAME }, 136 { NULL }, 137 { "list", zfs_do_list, HELP_LIST }, 138 { NULL }, 139 { "set", zfs_do_set, HELP_SET }, 140 { "get", zfs_do_get, HELP_GET }, 141 { "inherit", zfs_do_inherit, HELP_INHERIT }, 142 { NULL }, 143 { "mount", zfs_do_mount, HELP_MOUNT }, 144 { NULL }, 145 { "unmount", zfs_do_unmount, HELP_UNMOUNT }, 146 { NULL }, 147 { "share", zfs_do_share, HELP_SHARE }, 148 { NULL }, 149 { "unshare", zfs_do_unshare, HELP_UNSHARE }, 150 { NULL }, 151 { "send", zfs_do_send, HELP_SEND }, 152 { "receive", zfs_do_receive, HELP_RECEIVE }, 153 }; 154 155 #define NCOMMAND (sizeof (command_table) / sizeof (command_table[0])) 156 157 zfs_command_t *current_command; 158 159 static const char * 160 get_usage(zfs_help_t idx) 161 { 162 switch (idx) { 163 case HELP_CLONE: 164 return (gettext("\tclone <snapshot> <filesystem|volume>\n")); 165 case HELP_CREATE: 166 return (gettext("\tcreate [[-o property=value] ... ] " 167 "<filesystem>\n" 168 "\tcreate [-s] [-b blocksize] [[-o property=value] ...]\n" 169 "\t -V <size> <volume>\n")); 170 case HELP_DESTROY: 171 return (gettext("\tdestroy [-rRf] " 172 "<filesystem|volume|snapshot>\n")); 173 case HELP_GET: 174 return (gettext("\tget [-rHp] [-o field[,field]...] " 175 "[-s source[,source]...]\n" 176 "\t <all | property[,property]...> " 177 "[filesystem|volume|snapshot] ...\n")); 178 case HELP_INHERIT: 179 return (gettext("\tinherit [-r] <property> " 180 "<filesystem|volume> ...\n")); 181 case HELP_LIST: 182 return (gettext("\tlist [-rH] [-o property[,property]...] " 183 "[-t type[,type]...]\n" 184 "\t [-s property [-s property]...]" 185 " [-S property [-S property]...]\n" 186 "\t [filesystem|volume|snapshot] ...\n")); 187 case HELP_MOUNT: 188 return (gettext("\tmount\n" 189 "\tmount [-o opts] [-O] -a\n" 190 "\tmount [-o opts] [-O] <filesystem>\n")); 191 case HELP_PROMOTE: 192 return (gettext("\tpromote <clone filesystem>\n")); 193 case HELP_RECEIVE: 194 return (gettext("\treceive [-vnF] <filesystem|volume|" 195 "snapshot>\n" 196 "\treceive [-vnF] -d <filesystem>\n")); 197 case HELP_RENAME: 198 return (gettext("\trename <filesystem|volume|snapshot> " 199 "<filesystem|volume|snapshot>\n")); 200 case HELP_ROLLBACK: 201 return (gettext("\trollback [-rRf] <snapshot>\n")); 202 case HELP_SEND: 203 return (gettext("\tsend [-i <snapshot>] <snapshot>\n")); 204 case HELP_SET: 205 return (gettext("\tset <property=value> " 206 "<filesystem|volume> ...\n")); 207 case HELP_SHARE: 208 return (gettext("\tshare -a\n" 209 "\tshare <filesystem>\n")); 210 case HELP_SNAPSHOT: 211 return (gettext("\tsnapshot [-r] " 212 "<filesystem@name|volume@name>\n")); 213 case HELP_UNMOUNT: 214 return (gettext("\tunmount [-f] -a\n" 215 "\tunmount [-f] <filesystem|mountpoint>\n")); 216 case HELP_UNSHARE: 217 return (gettext("\tunshare [-f] -a\n" 218 "\tunshare [-f] <filesystem|mountpoint>\n")); 219 } 220 221 abort(); 222 /* NOTREACHED */ 223 } 224 225 /* 226 * Utility function to guarantee malloc() success. 227 */ 228 void * 229 safe_malloc(size_t size) 230 { 231 void *data; 232 233 if ((data = calloc(1, size)) == NULL) { 234 (void) fprintf(stderr, "internal error: out of memory\n"); 235 exit(1); 236 } 237 238 return (data); 239 } 240 241 /* 242 * Callback routinue that will print out information for each of the 243 * the properties. 244 */ 245 static zfs_prop_t 246 usage_prop_cb(zfs_prop_t prop, void *cb) 247 { 248 FILE *fp = cb; 249 250 (void) fprintf(fp, "\t%-13s ", zfs_prop_to_name(prop)); 251 252 if (zfs_prop_readonly(prop)) 253 (void) fprintf(fp, " NO "); 254 else 255 (void) fprintf(fp, " YES "); 256 257 if (zfs_prop_inheritable(prop)) 258 (void) fprintf(fp, " YES "); 259 else 260 (void) fprintf(fp, " NO "); 261 262 if (zfs_prop_values(prop) == NULL) 263 (void) fprintf(fp, "-\n"); 264 else 265 (void) fprintf(fp, "%s\n", zfs_prop_values(prop)); 266 267 return (ZFS_PROP_CONT); 268 } 269 270 /* 271 * Display usage message. If we're inside a command, display only the usage for 272 * that command. Otherwise, iterate over the entire command table and display 273 * a complete usage message. 274 */ 275 static void 276 usage(boolean_t requested) 277 { 278 int i; 279 boolean_t show_properties = B_FALSE; 280 FILE *fp = requested ? stdout : stderr; 281 282 if (current_command == NULL) { 283 284 (void) fprintf(fp, gettext("usage: zfs command args ...\n")); 285 (void) fprintf(fp, 286 gettext("where 'command' is one of the following:\n\n")); 287 288 for (i = 0; i < NCOMMAND; i++) { 289 if (command_table[i].name == NULL) 290 (void) fprintf(fp, "\n"); 291 else 292 (void) fprintf(fp, "%s", 293 get_usage(command_table[i].usage)); 294 } 295 296 (void) fprintf(fp, gettext("\nEach dataset is of the form: " 297 "pool/[dataset/]*dataset[@name]\n")); 298 } else { 299 (void) fprintf(fp, gettext("usage:\n")); 300 (void) fprintf(fp, "%s", get_usage(current_command->usage)); 301 } 302 303 if (current_command != NULL && 304 (strcmp(current_command->name, "set") == 0 || 305 strcmp(current_command->name, "get") == 0 || 306 strcmp(current_command->name, "inherit") == 0 || 307 strcmp(current_command->name, "list") == 0)) 308 show_properties = B_TRUE; 309 310 if (show_properties) { 311 312 (void) fprintf(fp, 313 gettext("\nThe following properties are supported:\n")); 314 315 (void) fprintf(fp, "\n\t%-13s %s %s %s\n\n", 316 "PROPERTY", "EDIT", "INHERIT", "VALUES"); 317 318 /* Iterate over all properties */ 319 (void) zfs_prop_iter(usage_prop_cb, fp, B_FALSE); 320 321 (void) fprintf(fp, gettext("\nSizes are specified in bytes " 322 "with standard units such as K, M, G, etc.\n")); 323 (void) fprintf(fp, gettext("\n\nUser-defined properties can " 324 "be specified by using a name containing a colon (:).\n")); 325 } else { 326 /* 327 * TRANSLATION NOTE: 328 * "zfs set|get" must not be localised this is the 329 * command name and arguments. 330 */ 331 (void) fprintf(fp, 332 gettext("\nFor the property list, run: zfs set|get\n")); 333 } 334 335 /* 336 * See comments at end of main(). 337 */ 338 if (getenv("ZFS_ABORT") != NULL) { 339 (void) printf("dumping core by request\n"); 340 abort(); 341 } 342 343 exit(requested ? 0 : 2); 344 } 345 346 /* 347 * zfs clone <fs, snap, vol> fs 348 * 349 * Given an existing dataset, create a writable copy whose initial contents 350 * are the same as the source. The newly created dataset maintains a 351 * dependency on the original; the original cannot be destroyed so long as 352 * the clone exists. 353 */ 354 static int 355 zfs_do_clone(int argc, char **argv) 356 { 357 zfs_handle_t *zhp; 358 int ret; 359 360 /* check options */ 361 if (argc > 1 && argv[1][0] == '-') { 362 (void) fprintf(stderr, gettext("invalid option '%c'\n"), 363 argv[1][1]); 364 usage(B_FALSE); 365 } 366 367 /* check number of arguments */ 368 if (argc < 2) { 369 (void) fprintf(stderr, gettext("missing source dataset " 370 "argument\n")); 371 usage(B_FALSE); 372 } 373 if (argc < 3) { 374 (void) fprintf(stderr, gettext("missing target dataset " 375 "argument\n")); 376 usage(B_FALSE); 377 } 378 if (argc > 3) { 379 (void) fprintf(stderr, gettext("too many arguments\n")); 380 usage(B_FALSE); 381 } 382 383 /* open the source dataset */ 384 if ((zhp = zfs_open(g_zfs, argv[1], ZFS_TYPE_SNAPSHOT)) == NULL) 385 return (1); 386 387 /* pass to libzfs */ 388 ret = zfs_clone(zhp, argv[2], NULL); 389 390 /* create the mountpoint if necessary */ 391 if (ret == 0) { 392 zfs_handle_t *clone = zfs_open(g_zfs, argv[2], ZFS_TYPE_ANY); 393 if (clone != NULL) { 394 if ((ret = zfs_mount(clone, NULL, 0)) == 0) 395 ret = zfs_share(clone); 396 zfs_close(clone); 397 } 398 zpool_log_history(g_zfs, argc, argv, argv[2], B_FALSE, B_FALSE); 399 } 400 401 zfs_close(zhp); 402 403 return (ret == 0 ? 0 : 1); 404 } 405 406 /* 407 * zfs create [-o prop=value] ... fs 408 * zfs create [-s] [-b blocksize] [-o prop=value] ... -V vol size 409 * 410 * Create a new dataset. This command can be used to create filesystems 411 * and volumes. Snapshot creation is handled by 'zfs snapshot'. 412 * For volumes, the user must specify a size to be used. 413 * 414 * The '-s' flag applies only to volumes, and indicates that we should not try 415 * to set the reservation for this volume. By default we set a reservation 416 * equal to the size for any volume. 417 */ 418 static int 419 zfs_do_create(int argc, char **argv) 420 { 421 zfs_type_t type = ZFS_TYPE_FILESYSTEM; 422 zfs_handle_t *zhp = NULL; 423 uint64_t volsize; 424 int c; 425 boolean_t noreserve = B_FALSE; 426 int ret = 1; 427 nvlist_t *props = NULL; 428 uint64_t intval; 429 char *propname; 430 char *propval = NULL; 431 char *strval; 432 433 if (nvlist_alloc(&props, NV_UNIQUE_NAME, 0) != 0) { 434 (void) fprintf(stderr, gettext("internal error: " 435 "out of memory\n")); 436 return (1); 437 } 438 439 /* check options */ 440 while ((c = getopt(argc, argv, ":V:b:so:")) != -1) { 441 switch (c) { 442 case 'V': 443 type = ZFS_TYPE_VOLUME; 444 if (zfs_nicestrtonum(g_zfs, optarg, &intval) != 0) { 445 (void) fprintf(stderr, gettext("bad volume " 446 "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_VOLSIZE), 453 intval) != 0) { 454 (void) fprintf(stderr, gettext("internal " 455 "error: out of memory\n")); 456 goto error; 457 } 458 volsize = intval; 459 break; 460 case 'b': 461 if (zfs_nicestrtonum(g_zfs, optarg, &intval) != 0) { 462 (void) fprintf(stderr, gettext("bad volume " 463 "block size '%s': %s\n"), optarg, 464 libzfs_error_description(g_zfs)); 465 goto error; 466 } 467 468 if (nvlist_add_uint64(props, 469 zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE), 470 intval) != 0) { 471 (void) fprintf(stderr, gettext("internal " 472 "error: out of memory\n")); 473 goto error; 474 } 475 break; 476 case 'o': 477 propname = optarg; 478 if ((propval = strchr(propname, '=')) == NULL) { 479 (void) fprintf(stderr, gettext("missing " 480 "'=' for -o option\n")); 481 goto error; 482 } 483 *propval = '\0'; 484 propval++; 485 if (nvlist_lookup_string(props, propname, 486 &strval) == 0) { 487 (void) fprintf(stderr, gettext("property '%s' " 488 "specified multiple times\n"), propname); 489 goto error; 490 } 491 if (nvlist_add_string(props, propname, propval) != 0) { 492 (void) fprintf(stderr, gettext("internal " 493 "error: out of memory\n")); 494 goto error; 495 } 496 break; 497 case 's': 498 noreserve = B_TRUE; 499 break; 500 case ':': 501 (void) fprintf(stderr, gettext("missing size " 502 "argument\n")); 503 goto badusage; 504 break; 505 case '?': 506 (void) fprintf(stderr, gettext("invalid option '%c'\n"), 507 optopt); 508 goto badusage; 509 } 510 } 511 512 if (noreserve && type != ZFS_TYPE_VOLUME) { 513 (void) fprintf(stderr, gettext("'-s' can only be used when " 514 "creating a volume\n")); 515 goto badusage; 516 } 517 518 argc -= optind; 519 argv += optind; 520 521 /* check number of arguments */ 522 if (argc == 0) { 523 (void) fprintf(stderr, gettext("missing %s argument\n"), 524 zfs_type_to_name(type)); 525 goto badusage; 526 } 527 if (argc > 1) { 528 (void) fprintf(stderr, gettext("too many arguments\n")); 529 goto badusage; 530 } 531 532 if (type == ZFS_TYPE_VOLUME && !noreserve && 533 nvlist_lookup_string(props, zfs_prop_to_name(ZFS_PROP_RESERVATION), 534 &strval) != 0) { 535 if (nvlist_add_uint64(props, 536 zfs_prop_to_name(ZFS_PROP_RESERVATION), 537 volsize) != 0) { 538 (void) fprintf(stderr, gettext("internal " 539 "error: out of memory\n")); 540 nvlist_free(props); 541 return (1); 542 } 543 } 544 545 /* pass to libzfs */ 546 if (zfs_create(g_zfs, argv[0], type, props) != 0) 547 goto error; 548 549 if (propval != NULL) 550 *(propval - 1) = '='; 551 zpool_log_history(g_zfs, argc + optind, argv - optind, argv[0], 552 B_FALSE, B_FALSE); 553 554 if ((zhp = zfs_open(g_zfs, argv[0], ZFS_TYPE_ANY)) == NULL) 555 goto error; 556 557 /* 558 * Mount and/or share the new filesystem as appropriate. We provide a 559 * verbose error message to let the user know that their filesystem was 560 * in fact created, even if we failed to mount or share it. 561 */ 562 if (zfs_mount(zhp, NULL, 0) != 0) { 563 (void) fprintf(stderr, gettext("filesystem successfully " 564 "created, but not mounted\n")); 565 ret = 1; 566 } else if (zfs_share(zhp) != 0) { 567 (void) fprintf(stderr, gettext("filesystem successfully " 568 "created, but not shared\n")); 569 ret = 1; 570 } else { 571 ret = 0; 572 } 573 574 error: 575 if (zhp) 576 zfs_close(zhp); 577 nvlist_free(props); 578 return (ret); 579 badusage: 580 nvlist_free(props); 581 usage(B_FALSE); 582 return (2); 583 } 584 585 /* 586 * zfs destroy [-rf] <fs, snap, vol> 587 * 588 * -r Recursively destroy all children 589 * -R Recursively destroy all dependents, including clones 590 * -f Force unmounting of any dependents 591 * 592 * Destroys the given dataset. By default, it will unmount any filesystems, 593 * and refuse to destroy a dataset that has any dependents. A dependent can 594 * either be a child, or a clone of a child. 595 */ 596 typedef struct destroy_cbdata { 597 boolean_t cb_first; 598 int cb_force; 599 int cb_recurse; 600 int cb_error; 601 int cb_needforce; 602 int cb_doclones; 603 boolean_t cb_closezhp; 604 zfs_handle_t *cb_target; 605 char *cb_snapname; 606 } destroy_cbdata_t; 607 608 /* 609 * Check for any dependents based on the '-r' or '-R' flags. 610 */ 611 static int 612 destroy_check_dependent(zfs_handle_t *zhp, void *data) 613 { 614 destroy_cbdata_t *cbp = data; 615 const char *tname = zfs_get_name(cbp->cb_target); 616 const char *name = zfs_get_name(zhp); 617 618 if (strncmp(tname, name, strlen(tname)) == 0 && 619 (name[strlen(tname)] == '/' || name[strlen(tname)] == '@')) { 620 /* 621 * This is a direct descendant, not a clone somewhere else in 622 * the hierarchy. 623 */ 624 if (cbp->cb_recurse) 625 goto out; 626 627 if (cbp->cb_first) { 628 (void) fprintf(stderr, gettext("cannot destroy '%s': " 629 "%s has children\n"), 630 zfs_get_name(cbp->cb_target), 631 zfs_type_to_name(zfs_get_type(cbp->cb_target))); 632 (void) fprintf(stderr, gettext("use '-r' to destroy " 633 "the following datasets:\n")); 634 cbp->cb_first = B_FALSE; 635 cbp->cb_error = 1; 636 } 637 638 (void) fprintf(stderr, "%s\n", zfs_get_name(zhp)); 639 } else { 640 /* 641 * This is a clone. We only want to report this if the '-r' 642 * wasn't specified, or the target is a snapshot. 643 */ 644 if (!cbp->cb_recurse && 645 zfs_get_type(cbp->cb_target) != ZFS_TYPE_SNAPSHOT) 646 goto out; 647 648 if (cbp->cb_first) { 649 (void) fprintf(stderr, gettext("cannot destroy '%s': " 650 "%s has dependent clones\n"), 651 zfs_get_name(cbp->cb_target), 652 zfs_type_to_name(zfs_get_type(cbp->cb_target))); 653 (void) fprintf(stderr, gettext("use '-R' to destroy " 654 "the following datasets:\n")); 655 cbp->cb_first = B_FALSE; 656 cbp->cb_error = 1; 657 } 658 659 (void) fprintf(stderr, "%s\n", zfs_get_name(zhp)); 660 } 661 662 out: 663 zfs_close(zhp); 664 return (0); 665 } 666 667 static int 668 destroy_callback(zfs_handle_t *zhp, void *data) 669 { 670 destroy_cbdata_t *cbp = data; 671 672 /* 673 * Ignore pools (which we've already flagged as an error before getting 674 * here. 675 */ 676 if (strchr(zfs_get_name(zhp), '/') == NULL && 677 zfs_get_type(zhp) == ZFS_TYPE_FILESYSTEM) { 678 zfs_close(zhp); 679 return (0); 680 } 681 682 /* 683 * Bail out on the first error. 684 */ 685 if (zfs_unmount(zhp, NULL, cbp->cb_force ? MS_FORCE : 0) != 0 || 686 zfs_destroy(zhp) != 0) { 687 zfs_close(zhp); 688 return (-1); 689 } 690 691 zfs_close(zhp); 692 return (0); 693 } 694 695 static int 696 destroy_snap_clones(zfs_handle_t *zhp, void *arg) 697 { 698 destroy_cbdata_t *cbp = arg; 699 char thissnap[MAXPATHLEN]; 700 zfs_handle_t *szhp; 701 boolean_t closezhp = cbp->cb_closezhp; 702 int rv; 703 704 (void) snprintf(thissnap, sizeof (thissnap), 705 "%s@%s", zfs_get_name(zhp), cbp->cb_snapname); 706 707 libzfs_print_on_error(g_zfs, B_FALSE); 708 szhp = zfs_open(g_zfs, thissnap, ZFS_TYPE_SNAPSHOT); 709 libzfs_print_on_error(g_zfs, B_TRUE); 710 if (szhp) { 711 /* 712 * Destroy any clones of this snapshot 713 */ 714 if (zfs_iter_dependents(szhp, B_FALSE, destroy_callback, 715 cbp) != 0) { 716 zfs_close(szhp); 717 if (closezhp) 718 zfs_close(zhp); 719 return (-1); 720 } 721 zfs_close(szhp); 722 } 723 724 cbp->cb_closezhp = B_TRUE; 725 rv = zfs_iter_filesystems(zhp, destroy_snap_clones, arg); 726 if (closezhp) 727 zfs_close(zhp); 728 return (rv); 729 } 730 731 static int 732 zfs_do_destroy(int argc, char **argv) 733 { 734 destroy_cbdata_t cb = { 0 }; 735 int c; 736 zfs_handle_t *zhp; 737 char *cp; 738 739 /* check options */ 740 while ((c = getopt(argc, argv, "frR")) != -1) { 741 switch (c) { 742 case 'f': 743 cb.cb_force = 1; 744 break; 745 case 'r': 746 cb.cb_recurse = 1; 747 break; 748 case 'R': 749 cb.cb_recurse = 1; 750 cb.cb_doclones = 1; 751 break; 752 case '?': 753 default: 754 (void) fprintf(stderr, gettext("invalid option '%c'\n"), 755 optopt); 756 usage(B_FALSE); 757 } 758 } 759 760 argc -= optind; 761 argv += optind; 762 763 /* check number of arguments */ 764 if (argc == 0) { 765 (void) fprintf(stderr, gettext("missing path argument\n")); 766 usage(B_FALSE); 767 } 768 if (argc > 1) { 769 (void) fprintf(stderr, gettext("too many arguments\n")); 770 usage(B_FALSE); 771 } 772 773 /* 774 * If we are doing recursive destroy of a snapshot, then the 775 * named snapshot may not exist. Go straight to libzfs. 776 */ 777 if (cb.cb_recurse && (cp = strchr(argv[0], '@'))) { 778 int ret; 779 780 *cp = '\0'; 781 if ((zhp = zfs_open(g_zfs, argv[0], ZFS_TYPE_ANY)) == NULL) 782 return (1); 783 *cp = '@'; 784 cp++; 785 786 if (cb.cb_doclones) { 787 cb.cb_snapname = cp; 788 if (destroy_snap_clones(zhp, &cb) != 0) { 789 zfs_close(zhp); 790 return (1); 791 } 792 } 793 794 ret = zfs_destroy_snaps(zhp, cp); 795 zfs_close(zhp); 796 if (ret) { 797 (void) fprintf(stderr, 798 gettext("no snapshots destroyed\n")); 799 } 800 return (ret != 0); 801 } 802 803 804 /* Open the given dataset */ 805 if ((zhp = zfs_open(g_zfs, argv[0], ZFS_TYPE_ANY)) == NULL) 806 return (1); 807 808 cb.cb_target = zhp; 809 810 /* 811 * Perform an explicit check for pools before going any further. 812 */ 813 if (!cb.cb_recurse && strchr(zfs_get_name(zhp), '/') == NULL && 814 zfs_get_type(zhp) == ZFS_TYPE_FILESYSTEM) { 815 (void) fprintf(stderr, gettext("cannot destroy '%s': " 816 "operation does not apply to pools\n"), 817 zfs_get_name(zhp)); 818 (void) fprintf(stderr, gettext("use 'zfs destroy -r " 819 "%s' to destroy all datasets in the pool\n"), 820 zfs_get_name(zhp)); 821 (void) fprintf(stderr, gettext("use 'zpool destroy %s' " 822 "to destroy the pool itself\n"), zfs_get_name(zhp)); 823 zfs_close(zhp); 824 return (1); 825 } 826 827 /* 828 * Check for any dependents and/or clones. 829 */ 830 cb.cb_first = B_TRUE; 831 if (!cb.cb_doclones && 832 zfs_iter_dependents(zhp, B_TRUE, destroy_check_dependent, 833 &cb) != 0) { 834 zfs_close(zhp); 835 return (1); 836 } 837 838 839 if (cb.cb_error || 840 zfs_iter_dependents(zhp, B_FALSE, destroy_callback, &cb) != 0) { 841 zfs_close(zhp); 842 return (1); 843 } 844 845 /* 846 * Do the real thing. The callback will close the handle regardless of 847 * whether it succeeds or not. 848 */ 849 if (destroy_callback(zhp, &cb) != 0) 850 return (1); 851 852 zpool_log_history(g_zfs, argc + optind, argv - optind, argv[0], 853 B_FALSE, B_FALSE); 854 855 return (0); 856 } 857 858 /* 859 * zfs get [-rHp] [-o field[,field]...] [-s source[,source]...] 860 * < all | property[,property]... > < fs | snap | vol > ... 861 * 862 * -r recurse over any child datasets 863 * -H scripted mode. Headers are stripped, and fields are separated 864 * by tabs instead of spaces. 865 * -o Set of fields to display. One of "name,property,value,source". 866 * Default is all four. 867 * -s Set of sources to allow. One of 868 * "local,default,inherited,temporary,none". Default is all 869 * five. 870 * -p Display values in parsable (literal) format. 871 * 872 * Prints properties for the given datasets. The user can control which 873 * columns to display as well as which property types to allow. 874 */ 875 typedef struct get_cbdata { 876 int cb_sources; 877 int cb_columns[4]; 878 int cb_colwidths[5]; 879 boolean_t cb_scripted; 880 boolean_t cb_literal; 881 boolean_t cb_first; 882 zfs_proplist_t *cb_proplist; 883 } get_cbdata_t; 884 885 #define GET_COL_NAME 1 886 #define GET_COL_PROPERTY 2 887 #define GET_COL_VALUE 3 888 #define GET_COL_SOURCE 4 889 890 /* 891 * Print the column headers for 'zfs get'. 892 */ 893 static void 894 print_get_headers(get_cbdata_t *cbp) 895 { 896 zfs_proplist_t *pl = cbp->cb_proplist; 897 int i; 898 char *title; 899 size_t len; 900 901 cbp->cb_first = B_FALSE; 902 if (cbp->cb_scripted) 903 return; 904 905 /* 906 * Start with the length of the column headers. 907 */ 908 cbp->cb_colwidths[GET_COL_NAME] = strlen(gettext("NAME")); 909 cbp->cb_colwidths[GET_COL_PROPERTY] = strlen(gettext("PROPERTY")); 910 cbp->cb_colwidths[GET_COL_VALUE] = strlen(gettext("VALUE")); 911 cbp->cb_colwidths[GET_COL_SOURCE] = strlen(gettext("SOURCE")); 912 913 /* 914 * Go through and calculate the widths for each column. For the 915 * 'source' column, we kludge it up by taking the worst-case scenario of 916 * inheriting from the longest name. This is acceptable because in the 917 * majority of cases 'SOURCE' is the last column displayed, and we don't 918 * use the width anyway. Note that the 'VALUE' column can be oversized, 919 * if the name of the property is much longer the any values we find. 920 */ 921 for (pl = cbp->cb_proplist; pl != NULL; pl = pl->pl_next) { 922 /* 923 * 'PROPERTY' column 924 */ 925 if (pl->pl_prop != ZFS_PROP_INVAL) { 926 len = strlen(zfs_prop_to_name(pl->pl_prop)); 927 if (len > cbp->cb_colwidths[GET_COL_PROPERTY]) 928 cbp->cb_colwidths[GET_COL_PROPERTY] = len; 929 } else { 930 len = strlen(pl->pl_user_prop); 931 if (len > cbp->cb_colwidths[GET_COL_PROPERTY]) 932 cbp->cb_colwidths[GET_COL_PROPERTY] = len; 933 } 934 935 /* 936 * 'VALUE' column 937 */ 938 if ((pl->pl_prop != ZFS_PROP_NAME || !pl->pl_all) && 939 pl->pl_width > cbp->cb_colwidths[GET_COL_VALUE]) 940 cbp->cb_colwidths[GET_COL_VALUE] = pl->pl_width; 941 942 /* 943 * 'NAME' and 'SOURCE' columns 944 */ 945 if (pl->pl_prop == ZFS_PROP_NAME && 946 pl->pl_width > cbp->cb_colwidths[GET_COL_NAME]) { 947 cbp->cb_colwidths[GET_COL_NAME] = pl->pl_width; 948 cbp->cb_colwidths[GET_COL_SOURCE] = pl->pl_width + 949 strlen(gettext("inherited from")); 950 } 951 } 952 953 /* 954 * Now go through and print the headers. 955 */ 956 for (i = 0; i < 4; i++) { 957 switch (cbp->cb_columns[i]) { 958 case GET_COL_NAME: 959 title = gettext("NAME"); 960 break; 961 case GET_COL_PROPERTY: 962 title = gettext("PROPERTY"); 963 break; 964 case GET_COL_VALUE: 965 title = gettext("VALUE"); 966 break; 967 case GET_COL_SOURCE: 968 title = gettext("SOURCE"); 969 break; 970 default: 971 title = NULL; 972 } 973 974 if (title != NULL) { 975 if (i == 3 || cbp->cb_columns[i + 1] == 0) 976 (void) printf("%s", title); 977 else 978 (void) printf("%-*s ", 979 cbp->cb_colwidths[cbp->cb_columns[i]], 980 title); 981 } 982 } 983 (void) printf("\n"); 984 } 985 986 /* 987 * Display a single line of output, according to the settings in the callback 988 * structure. 989 */ 990 static void 991 print_one_property(zfs_handle_t *zhp, get_cbdata_t *cbp, const char *propname, 992 const char *value, zfs_source_t sourcetype, const char *source) 993 { 994 int i; 995 const char *str; 996 char buf[128]; 997 998 /* 999 * Ignore those source types that the user has chosen to ignore. 1000 */ 1001 if ((sourcetype & cbp->cb_sources) == 0) 1002 return; 1003 1004 if (cbp->cb_first) 1005 print_get_headers(cbp); 1006 1007 for (i = 0; i < 4; i++) { 1008 switch (cbp->cb_columns[i]) { 1009 case GET_COL_NAME: 1010 str = zfs_get_name(zhp); 1011 break; 1012 1013 case GET_COL_PROPERTY: 1014 str = propname; 1015 break; 1016 1017 case GET_COL_VALUE: 1018 str = value; 1019 break; 1020 1021 case GET_COL_SOURCE: 1022 switch (sourcetype) { 1023 case ZFS_SRC_NONE: 1024 str = "-"; 1025 break; 1026 1027 case ZFS_SRC_DEFAULT: 1028 str = "default"; 1029 break; 1030 1031 case ZFS_SRC_LOCAL: 1032 str = "local"; 1033 break; 1034 1035 case ZFS_SRC_TEMPORARY: 1036 str = "temporary"; 1037 break; 1038 1039 case ZFS_SRC_INHERITED: 1040 (void) snprintf(buf, sizeof (buf), 1041 "inherited from %s", source); 1042 str = buf; 1043 break; 1044 } 1045 break; 1046 1047 default: 1048 continue; 1049 } 1050 1051 if (cbp->cb_columns[i + 1] == 0) 1052 (void) printf("%s", str); 1053 else if (cbp->cb_scripted) 1054 (void) printf("%s\t", str); 1055 else 1056 (void) printf("%-*s ", 1057 cbp->cb_colwidths[cbp->cb_columns[i]], 1058 str); 1059 1060 } 1061 1062 (void) printf("\n"); 1063 } 1064 1065 /* 1066 * Invoked to display the properties for a single dataset. 1067 */ 1068 static int 1069 get_callback(zfs_handle_t *zhp, void *data) 1070 { 1071 char buf[ZFS_MAXPROPLEN]; 1072 zfs_source_t sourcetype; 1073 char source[ZFS_MAXNAMELEN]; 1074 get_cbdata_t *cbp = data; 1075 nvlist_t *userprop = zfs_get_user_props(zhp); 1076 zfs_proplist_t *pl = cbp->cb_proplist; 1077 nvlist_t *propval; 1078 char *strval; 1079 char *sourceval; 1080 1081 for (; pl != NULL; pl = pl->pl_next) { 1082 /* 1083 * Skip the special fake placeholder. This will also skip over 1084 * the name property when 'all' is specified. 1085 */ 1086 if (pl->pl_prop == ZFS_PROP_NAME && 1087 pl == cbp->cb_proplist) 1088 continue; 1089 1090 if (pl->pl_prop != ZFS_PROP_INVAL) { 1091 if (zfs_prop_get(zhp, pl->pl_prop, buf, 1092 sizeof (buf), &sourcetype, source, 1093 sizeof (source), 1094 cbp->cb_literal) != 0) { 1095 if (pl->pl_all) 1096 continue; 1097 sourcetype = ZFS_SRC_NONE; 1098 (void) strlcpy(buf, "-", sizeof (buf)); 1099 } 1100 1101 print_one_property(zhp, cbp, 1102 zfs_prop_to_name(pl->pl_prop), 1103 buf, sourcetype, source); 1104 } else { 1105 if (nvlist_lookup_nvlist(userprop, 1106 pl->pl_user_prop, &propval) != 0) { 1107 if (pl->pl_all) 1108 continue; 1109 sourcetype = ZFS_SRC_NONE; 1110 strval = "-"; 1111 } else { 1112 verify(nvlist_lookup_string(propval, 1113 ZFS_PROP_VALUE, &strval) == 0); 1114 verify(nvlist_lookup_string(propval, 1115 ZFS_PROP_SOURCE, &sourceval) == 0); 1116 1117 if (strcmp(sourceval, 1118 zfs_get_name(zhp)) == 0) { 1119 sourcetype = ZFS_SRC_LOCAL; 1120 } else { 1121 sourcetype = ZFS_SRC_INHERITED; 1122 (void) strlcpy(source, 1123 sourceval, sizeof (source)); 1124 } 1125 } 1126 1127 print_one_property(zhp, cbp, 1128 pl->pl_user_prop, strval, sourcetype, 1129 source); 1130 } 1131 } 1132 1133 return (0); 1134 } 1135 1136 static int 1137 zfs_do_get(int argc, char **argv) 1138 { 1139 get_cbdata_t cb = { 0 }; 1140 boolean_t recurse = B_FALSE; 1141 int i, c; 1142 char *value, *fields; 1143 int ret; 1144 zfs_proplist_t fake_name = { 0 }; 1145 1146 /* 1147 * Set up default columns and sources. 1148 */ 1149 cb.cb_sources = ZFS_SRC_ALL; 1150 cb.cb_columns[0] = GET_COL_NAME; 1151 cb.cb_columns[1] = GET_COL_PROPERTY; 1152 cb.cb_columns[2] = GET_COL_VALUE; 1153 cb.cb_columns[3] = GET_COL_SOURCE; 1154 1155 /* check options */ 1156 while ((c = getopt(argc, argv, ":o:s:rHp")) != -1) { 1157 switch (c) { 1158 case 'p': 1159 cb.cb_literal = B_TRUE; 1160 break; 1161 case 'r': 1162 recurse = B_TRUE; 1163 break; 1164 case 'H': 1165 cb.cb_scripted = B_TRUE; 1166 break; 1167 case ':': 1168 (void) fprintf(stderr, gettext("missing argument for " 1169 "'%c' option\n"), optopt); 1170 usage(B_FALSE); 1171 break; 1172 case 'o': 1173 /* 1174 * Process the set of columns to display. We zero out 1175 * the structure to give us a blank slate. 1176 */ 1177 bzero(&cb.cb_columns, sizeof (cb.cb_columns)); 1178 i = 0; 1179 while (*optarg != '\0') { 1180 static char *col_subopts[] = 1181 { "name", "property", "value", "source", 1182 NULL }; 1183 1184 if (i == 4) { 1185 (void) fprintf(stderr, gettext("too " 1186 "many fields given to -o " 1187 "option\n")); 1188 usage(B_FALSE); 1189 } 1190 1191 switch (getsubopt(&optarg, col_subopts, 1192 &value)) { 1193 case 0: 1194 cb.cb_columns[i++] = GET_COL_NAME; 1195 break; 1196 case 1: 1197 cb.cb_columns[i++] = GET_COL_PROPERTY; 1198 break; 1199 case 2: 1200 cb.cb_columns[i++] = GET_COL_VALUE; 1201 break; 1202 case 3: 1203 cb.cb_columns[i++] = GET_COL_SOURCE; 1204 break; 1205 default: 1206 (void) fprintf(stderr, 1207 gettext("invalid column name " 1208 "'%s'\n"), value); 1209 usage(B_FALSE); 1210 } 1211 } 1212 break; 1213 1214 case 's': 1215 cb.cb_sources = 0; 1216 while (*optarg != '\0') { 1217 static char *source_subopts[] = { 1218 "local", "default", "inherited", 1219 "temporary", "none", NULL }; 1220 1221 switch (getsubopt(&optarg, source_subopts, 1222 &value)) { 1223 case 0: 1224 cb.cb_sources |= ZFS_SRC_LOCAL; 1225 break; 1226 case 1: 1227 cb.cb_sources |= ZFS_SRC_DEFAULT; 1228 break; 1229 case 2: 1230 cb.cb_sources |= ZFS_SRC_INHERITED; 1231 break; 1232 case 3: 1233 cb.cb_sources |= ZFS_SRC_TEMPORARY; 1234 break; 1235 case 4: 1236 cb.cb_sources |= ZFS_SRC_NONE; 1237 break; 1238 default: 1239 (void) fprintf(stderr, 1240 gettext("invalid source " 1241 "'%s'\n"), value); 1242 usage(B_FALSE); 1243 } 1244 } 1245 break; 1246 1247 case '?': 1248 (void) fprintf(stderr, gettext("invalid option '%c'\n"), 1249 optopt); 1250 usage(B_FALSE); 1251 } 1252 } 1253 1254 argc -= optind; 1255 argv += optind; 1256 1257 if (argc < 1) { 1258 (void) fprintf(stderr, gettext("missing property " 1259 "argument\n")); 1260 usage(B_FALSE); 1261 } 1262 1263 fields = argv[0]; 1264 1265 if (zfs_get_proplist(g_zfs, fields, &cb.cb_proplist) != 0) 1266 usage(B_FALSE); 1267 1268 argc--; 1269 argv++; 1270 1271 /* 1272 * As part of zfs_expand_proplist(), we keep track of the maximum column 1273 * width for each property. For the 'NAME' (and 'SOURCE') columns, we 1274 * need to know the maximum name length. However, the user likely did 1275 * not specify 'name' as one of the properties to fetch, so we need to 1276 * make sure we always include at least this property for 1277 * print_get_headers() to work properly. 1278 */ 1279 if (cb.cb_proplist != NULL) { 1280 fake_name.pl_prop = ZFS_PROP_NAME; 1281 fake_name.pl_width = strlen(gettext("NAME")); 1282 fake_name.pl_next = cb.cb_proplist; 1283 cb.cb_proplist = &fake_name; 1284 } 1285 1286 cb.cb_first = B_TRUE; 1287 1288 /* run for each object */ 1289 ret = zfs_for_each(argc, argv, recurse, ZFS_TYPE_ANY, NULL, 1290 &cb.cb_proplist, get_callback, &cb, B_FALSE); 1291 1292 if (cb.cb_proplist == &fake_name) 1293 zfs_free_proplist(fake_name.pl_next); 1294 else 1295 zfs_free_proplist(cb.cb_proplist); 1296 1297 return (ret); 1298 } 1299 1300 /* 1301 * inherit [-r] <property> <fs|vol> ... 1302 * 1303 * -r Recurse over all children 1304 * 1305 * For each dataset specified on the command line, inherit the given property 1306 * from its parent. Inheriting a property at the pool level will cause it to 1307 * use the default value. The '-r' flag will recurse over all children, and is 1308 * useful for setting a property on a hierarchy-wide basis, regardless of any 1309 * local modifications for each dataset. 1310 */ 1311 typedef struct inherit_cbdata { 1312 char *cb_propname; 1313 boolean_t cb_any_successful; 1314 } inherit_cbdata_t; 1315 1316 static int 1317 inherit_callback(zfs_handle_t *zhp, void *data) 1318 { 1319 inherit_cbdata_t *cbp = data; 1320 int ret; 1321 1322 ret = zfs_prop_inherit(zhp, cbp->cb_propname); 1323 if (ret == 0) 1324 cbp->cb_any_successful = B_TRUE; 1325 return (ret != 0); 1326 } 1327 1328 static int 1329 zfs_do_inherit(int argc, char **argv) 1330 { 1331 boolean_t recurse = B_FALSE; 1332 int c; 1333 zfs_prop_t prop; 1334 inherit_cbdata_t cb; 1335 int ret; 1336 1337 /* check options */ 1338 while ((c = getopt(argc, argv, "r")) != -1) { 1339 switch (c) { 1340 case 'r': 1341 recurse = B_TRUE; 1342 break; 1343 case '?': 1344 default: 1345 (void) fprintf(stderr, gettext("invalid option '%c'\n"), 1346 optopt); 1347 usage(B_FALSE); 1348 } 1349 } 1350 1351 argc -= optind; 1352 argv += optind; 1353 1354 /* check number of arguments */ 1355 if (argc < 1) { 1356 (void) fprintf(stderr, gettext("missing property argument\n")); 1357 usage(B_FALSE); 1358 } 1359 if (argc < 2) { 1360 (void) fprintf(stderr, gettext("missing dataset argument\n")); 1361 usage(B_FALSE); 1362 } 1363 1364 cb.cb_propname = argv[0]; 1365 argc--; 1366 argv++; 1367 1368 if ((prop = zfs_name_to_prop(cb.cb_propname)) != ZFS_PROP_INVAL) { 1369 if (zfs_prop_readonly(prop)) { 1370 (void) fprintf(stderr, gettext( 1371 "%s property is read-only\n"), 1372 cb.cb_propname); 1373 return (1); 1374 } 1375 if (!zfs_prop_inheritable(prop)) { 1376 (void) fprintf(stderr, gettext("'%s' property cannot " 1377 "be inherited\n"), cb.cb_propname); 1378 if (prop == ZFS_PROP_QUOTA || 1379 prop == ZFS_PROP_RESERVATION) 1380 (void) fprintf(stderr, gettext("use 'zfs set " 1381 "%s=none' to clear\n"), cb.cb_propname); 1382 return (1); 1383 } 1384 } else if (!zfs_prop_user(cb.cb_propname)) { 1385 (void) fprintf(stderr, gettext( 1386 "invalid property '%s'\n"), 1387 cb.cb_propname); 1388 usage(B_FALSE); 1389 } 1390 1391 cb.cb_any_successful = B_FALSE; 1392 1393 ret = zfs_for_each(argc, argv, recurse, 1394 ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME, NULL, NULL, 1395 inherit_callback, &cb, B_FALSE); 1396 1397 if (cb.cb_any_successful) { 1398 zpool_log_history(g_zfs, argc + optind + 1, argv - optind - 1, 1399 argv[0], B_FALSE, B_FALSE); 1400 } 1401 1402 return (ret); 1403 } 1404 1405 /* 1406 * list [-rH] [-o property[,property]...] [-t type[,type]...] 1407 * [-s property [-s property]...] [-S property [-S property]...] 1408 * <dataset> ... 1409 * 1410 * -r Recurse over all children 1411 * -H Scripted mode; elide headers and separate colums by tabs 1412 * -o Control which fields to display. 1413 * -t Control which object types to display. 1414 * -s Specify sort columns, descending order. 1415 * -S Specify sort columns, ascending order. 1416 * 1417 * When given no arguments, lists all filesystems in the system. 1418 * Otherwise, list the specified datasets, optionally recursing down them if 1419 * '-r' is specified. 1420 */ 1421 typedef struct list_cbdata { 1422 boolean_t cb_first; 1423 boolean_t cb_scripted; 1424 zfs_proplist_t *cb_proplist; 1425 } list_cbdata_t; 1426 1427 /* 1428 * Given a list of columns to display, output appropriate headers for each one. 1429 */ 1430 static void 1431 print_header(zfs_proplist_t *pl) 1432 { 1433 char headerbuf[ZFS_MAXPROPLEN]; 1434 const char *header; 1435 int i; 1436 boolean_t first = B_TRUE; 1437 boolean_t right_justify; 1438 1439 for (; pl != NULL; pl = pl->pl_next) { 1440 if (!first) { 1441 (void) printf(" "); 1442 } else { 1443 first = B_FALSE; 1444 } 1445 1446 right_justify = B_FALSE; 1447 if (pl->pl_prop != ZFS_PROP_INVAL) { 1448 header = zfs_prop_column_name(pl->pl_prop); 1449 right_justify = zfs_prop_align_right(pl->pl_prop); 1450 } else { 1451 for (i = 0; pl->pl_user_prop[i] != '\0'; i++) 1452 headerbuf[i] = toupper(pl->pl_user_prop[i]); 1453 headerbuf[i] = '\0'; 1454 header = headerbuf; 1455 } 1456 1457 if (pl->pl_next == NULL && !right_justify) 1458 (void) printf("%s", header); 1459 else if (right_justify) 1460 (void) printf("%*s", pl->pl_width, header); 1461 else 1462 (void) printf("%-*s", pl->pl_width, header); 1463 } 1464 1465 (void) printf("\n"); 1466 } 1467 1468 /* 1469 * Given a dataset and a list of fields, print out all the properties according 1470 * to the described layout. 1471 */ 1472 static void 1473 print_dataset(zfs_handle_t *zhp, zfs_proplist_t *pl, int scripted) 1474 { 1475 boolean_t first = B_TRUE; 1476 char property[ZFS_MAXPROPLEN]; 1477 nvlist_t *userprops = zfs_get_user_props(zhp); 1478 nvlist_t *propval; 1479 char *propstr; 1480 boolean_t right_justify; 1481 int width; 1482 1483 for (; pl != NULL; pl = pl->pl_next) { 1484 if (!first) { 1485 if (scripted) 1486 (void) printf("\t"); 1487 else 1488 (void) printf(" "); 1489 } else { 1490 first = B_FALSE; 1491 } 1492 1493 right_justify = B_FALSE; 1494 if (pl->pl_prop != ZFS_PROP_INVAL) { 1495 if (zfs_prop_get(zhp, pl->pl_prop, property, 1496 sizeof (property), NULL, NULL, 0, B_FALSE) != 0) 1497 propstr = "-"; 1498 else 1499 propstr = property; 1500 1501 right_justify = zfs_prop_align_right(pl->pl_prop); 1502 } else { 1503 if (nvlist_lookup_nvlist(userprops, 1504 pl->pl_user_prop, &propval) != 0) 1505 propstr = "-"; 1506 else 1507 verify(nvlist_lookup_string(propval, 1508 ZFS_PROP_VALUE, &propstr) == 0); 1509 } 1510 1511 width = pl->pl_width; 1512 1513 /* 1514 * If this is being called in scripted mode, or if this is the 1515 * last column and it is left-justified, don't include a width 1516 * format specifier. 1517 */ 1518 if (scripted || (pl->pl_next == NULL && !right_justify)) 1519 (void) printf("%s", propstr); 1520 else if (right_justify) 1521 (void) printf("%*s", width, propstr); 1522 else 1523 (void) printf("%-*s", width, propstr); 1524 } 1525 1526 (void) printf("\n"); 1527 } 1528 1529 /* 1530 * Generic callback function to list a dataset or snapshot. 1531 */ 1532 static int 1533 list_callback(zfs_handle_t *zhp, void *data) 1534 { 1535 list_cbdata_t *cbp = data; 1536 1537 if (cbp->cb_first) { 1538 if (!cbp->cb_scripted) 1539 print_header(cbp->cb_proplist); 1540 cbp->cb_first = B_FALSE; 1541 } 1542 1543 print_dataset(zhp, cbp->cb_proplist, cbp->cb_scripted); 1544 1545 return (0); 1546 } 1547 1548 static int 1549 zfs_do_list(int argc, char **argv) 1550 { 1551 int c; 1552 boolean_t recurse = B_FALSE; 1553 boolean_t scripted = B_FALSE; 1554 static char default_fields[] = 1555 "name,used,available,referenced,mountpoint"; 1556 int types = ZFS_TYPE_ANY; 1557 char *fields = NULL; 1558 char *basic_fields = default_fields; 1559 list_cbdata_t cb = { 0 }; 1560 char *value; 1561 int ret; 1562 char *type_subopts[] = { "filesystem", "volume", "snapshot", NULL }; 1563 zfs_sort_column_t *sortcol = NULL; 1564 1565 /* check options */ 1566 while ((c = getopt(argc, argv, ":o:rt:Hs:S:")) != -1) { 1567 switch (c) { 1568 case 'o': 1569 fields = optarg; 1570 break; 1571 case 'r': 1572 recurse = B_TRUE; 1573 break; 1574 case 'H': 1575 scripted = B_TRUE; 1576 break; 1577 case 's': 1578 if (zfs_add_sort_column(&sortcol, optarg, 1579 B_FALSE) != 0) { 1580 (void) fprintf(stderr, 1581 gettext("invalid property '%s'\n"), optarg); 1582 usage(B_FALSE); 1583 } 1584 break; 1585 case 'S': 1586 if (zfs_add_sort_column(&sortcol, optarg, 1587 B_TRUE) != 0) { 1588 (void) fprintf(stderr, 1589 gettext("invalid property '%s'\n"), optarg); 1590 usage(B_FALSE); 1591 } 1592 break; 1593 case 't': 1594 types = 0; 1595 while (*optarg != '\0') { 1596 switch (getsubopt(&optarg, type_subopts, 1597 &value)) { 1598 case 0: 1599 types |= ZFS_TYPE_FILESYSTEM; 1600 break; 1601 case 1: 1602 types |= ZFS_TYPE_VOLUME; 1603 break; 1604 case 2: 1605 types |= ZFS_TYPE_SNAPSHOT; 1606 break; 1607 default: 1608 (void) fprintf(stderr, 1609 gettext("invalid type '%s'\n"), 1610 value); 1611 usage(B_FALSE); 1612 } 1613 } 1614 break; 1615 case ':': 1616 (void) fprintf(stderr, gettext("missing argument for " 1617 "'%c' option\n"), optopt); 1618 usage(B_FALSE); 1619 break; 1620 case '?': 1621 (void) fprintf(stderr, gettext("invalid option '%c'\n"), 1622 optopt); 1623 usage(B_FALSE); 1624 } 1625 } 1626 1627 argc -= optind; 1628 argv += optind; 1629 1630 if (fields == NULL) 1631 fields = basic_fields; 1632 1633 /* 1634 * If the user specifies '-o all', the zfs_get_proplist() doesn't 1635 * normally include the name of the dataset. For 'zfs list', we always 1636 * want this property to be first. 1637 */ 1638 if (zfs_get_proplist(g_zfs, fields, &cb.cb_proplist) != 0) 1639 usage(B_FALSE); 1640 1641 cb.cb_scripted = scripted; 1642 cb.cb_first = B_TRUE; 1643 1644 ret = zfs_for_each(argc, argv, recurse, types, sortcol, &cb.cb_proplist, 1645 list_callback, &cb, B_TRUE); 1646 1647 zfs_free_proplist(cb.cb_proplist); 1648 zfs_free_sort_columns(sortcol); 1649 1650 if (ret == 0 && cb.cb_first) 1651 (void) printf(gettext("no datasets available\n")); 1652 1653 return (ret); 1654 } 1655 1656 /* 1657 * zfs rename <fs | snap | vol> <fs | snap | vol> 1658 * 1659 * Renames the given dataset to another of the same type. 1660 */ 1661 /* ARGSUSED */ 1662 static int 1663 zfs_do_rename(int argc, char **argv) 1664 { 1665 zfs_handle_t *zhp; 1666 int ret; 1667 1668 /* check options */ 1669 if (argc > 1 && argv[1][0] == '-') { 1670 (void) fprintf(stderr, gettext("invalid option '%c'\n"), 1671 argv[1][1]); 1672 usage(B_FALSE); 1673 } 1674 1675 /* check number of arguments */ 1676 if (argc < 2) { 1677 (void) fprintf(stderr, gettext("missing source dataset " 1678 "argument\n")); 1679 usage(B_FALSE); 1680 } 1681 if (argc < 3) { 1682 (void) fprintf(stderr, gettext("missing target dataset " 1683 "argument\n")); 1684 usage(B_FALSE); 1685 } 1686 if (argc > 3) { 1687 (void) fprintf(stderr, gettext("too many arguments\n")); 1688 usage(B_FALSE); 1689 } 1690 1691 if ((zhp = zfs_open(g_zfs, argv[1], ZFS_TYPE_ANY)) == NULL) 1692 return (1); 1693 1694 ret = (zfs_rename(zhp, argv[2]) != 0); 1695 1696 if (!ret) 1697 zpool_log_history(g_zfs, argc, argv, argv[2], B_FALSE, B_FALSE); 1698 1699 zfs_close(zhp); 1700 return (ret); 1701 } 1702 1703 /* 1704 * zfs promote <fs> 1705 * 1706 * Promotes the given clone fs to be the parent 1707 */ 1708 /* ARGSUSED */ 1709 static int 1710 zfs_do_promote(int argc, char **argv) 1711 { 1712 zfs_handle_t *zhp; 1713 int ret; 1714 1715 /* check options */ 1716 if (argc > 1 && argv[1][0] == '-') { 1717 (void) fprintf(stderr, gettext("invalid option '%c'\n"), 1718 argv[1][1]); 1719 usage(B_FALSE); 1720 } 1721 1722 /* check number of arguments */ 1723 if (argc < 2) { 1724 (void) fprintf(stderr, gettext("missing clone filesystem" 1725 " argument\n")); 1726 usage(B_FALSE); 1727 } 1728 if (argc > 2) { 1729 (void) fprintf(stderr, gettext("too many arguments\n")); 1730 usage(B_FALSE); 1731 } 1732 1733 zhp = zfs_open(g_zfs, argv[1], ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME); 1734 if (zhp == NULL) 1735 return (1); 1736 1737 ret = (zfs_promote(zhp) != 0); 1738 1739 if (!ret) 1740 zpool_log_history(g_zfs, argc, argv, argv[1], B_FALSE, B_FALSE); 1741 1742 zfs_close(zhp); 1743 return (ret); 1744 } 1745 1746 /* 1747 * zfs rollback [-rfR] <snapshot> 1748 * 1749 * -r Delete any intervening snapshots before doing rollback 1750 * -R Delete any snapshots and their clones 1751 * -f Force unmount filesystems, even if they are in use. 1752 * 1753 * Given a filesystem, rollback to a specific snapshot, discarding any changes 1754 * since then and making it the active dataset. If more recent snapshots exist, 1755 * the command will complain unless the '-r' flag is given. 1756 */ 1757 typedef struct rollback_cbdata { 1758 uint64_t cb_create; 1759 boolean_t cb_first; 1760 int cb_doclones; 1761 char *cb_target; 1762 int cb_error; 1763 boolean_t cb_recurse; 1764 boolean_t cb_dependent; 1765 } rollback_cbdata_t; 1766 1767 /* 1768 * Report any snapshots more recent than the one specified. Used when '-r' is 1769 * not specified. We reuse this same callback for the snapshot dependents - if 1770 * 'cb_dependent' is set, then this is a dependent and we should report it 1771 * without checking the transaction group. 1772 */ 1773 static int 1774 rollback_check(zfs_handle_t *zhp, void *data) 1775 { 1776 rollback_cbdata_t *cbp = data; 1777 1778 if (cbp->cb_doclones) { 1779 zfs_close(zhp); 1780 return (0); 1781 } 1782 1783 if (!cbp->cb_dependent) { 1784 if (strcmp(zfs_get_name(zhp), cbp->cb_target) != 0 && 1785 zfs_get_type(zhp) == ZFS_TYPE_SNAPSHOT && 1786 zfs_prop_get_int(zhp, ZFS_PROP_CREATETXG) > 1787 cbp->cb_create) { 1788 1789 if (cbp->cb_first && !cbp->cb_recurse) { 1790 (void) fprintf(stderr, gettext("cannot " 1791 "rollback to '%s': more recent snapshots " 1792 "exist\n"), 1793 cbp->cb_target); 1794 (void) fprintf(stderr, gettext("use '-r' to " 1795 "force deletion of the following " 1796 "snapshots:\n")); 1797 cbp->cb_first = 0; 1798 cbp->cb_error = 1; 1799 } 1800 1801 if (cbp->cb_recurse) { 1802 cbp->cb_dependent = B_TRUE; 1803 if (zfs_iter_dependents(zhp, B_TRUE, 1804 rollback_check, cbp) != 0) { 1805 zfs_close(zhp); 1806 return (-1); 1807 } 1808 cbp->cb_dependent = B_FALSE; 1809 } else { 1810 (void) fprintf(stderr, "%s\n", 1811 zfs_get_name(zhp)); 1812 } 1813 } 1814 } else { 1815 if (cbp->cb_first && cbp->cb_recurse) { 1816 (void) fprintf(stderr, gettext("cannot rollback to " 1817 "'%s': clones of previous snapshots exist\n"), 1818 cbp->cb_target); 1819 (void) fprintf(stderr, gettext("use '-R' to " 1820 "force deletion of the following clones and " 1821 "dependents:\n")); 1822 cbp->cb_first = 0; 1823 cbp->cb_error = 1; 1824 } 1825 1826 (void) fprintf(stderr, "%s\n", zfs_get_name(zhp)); 1827 } 1828 1829 zfs_close(zhp); 1830 return (0); 1831 } 1832 1833 static int 1834 zfs_do_rollback(int argc, char **argv) 1835 { 1836 int ret; 1837 int c; 1838 rollback_cbdata_t cb = { 0 }; 1839 zfs_handle_t *zhp, *snap; 1840 char parentname[ZFS_MAXNAMELEN]; 1841 char *delim; 1842 int force = 0; 1843 1844 /* check options */ 1845 while ((c = getopt(argc, argv, "rfR")) != -1) { 1846 switch (c) { 1847 case 'f': 1848 force = 1; 1849 break; 1850 case 'r': 1851 cb.cb_recurse = 1; 1852 break; 1853 case 'R': 1854 cb.cb_recurse = 1; 1855 cb.cb_doclones = 1; 1856 break; 1857 case '?': 1858 (void) fprintf(stderr, gettext("invalid option '%c'\n"), 1859 optopt); 1860 usage(B_FALSE); 1861 } 1862 } 1863 1864 argc -= optind; 1865 argv += optind; 1866 1867 /* check number of arguments */ 1868 if (argc < 1) { 1869 (void) fprintf(stderr, gettext("missing dataset argument\n")); 1870 usage(B_FALSE); 1871 } 1872 if (argc > 1) { 1873 (void) fprintf(stderr, gettext("too many arguments\n")); 1874 usage(B_FALSE); 1875 } 1876 1877 /* open the snapshot */ 1878 if ((snap = zfs_open(g_zfs, argv[0], ZFS_TYPE_SNAPSHOT)) == NULL) 1879 return (1); 1880 1881 /* open the parent dataset */ 1882 (void) strlcpy(parentname, argv[0], sizeof (parentname)); 1883 verify((delim = strrchr(parentname, '@')) != NULL); 1884 *delim = '\0'; 1885 if ((zhp = zfs_open(g_zfs, parentname, ZFS_TYPE_ANY)) == NULL) { 1886 zfs_close(snap); 1887 return (1); 1888 } 1889 1890 /* 1891 * Check for more recent snapshots and/or clones based on the presence 1892 * of '-r' and '-R'. 1893 */ 1894 cb.cb_target = argv[0]; 1895 cb.cb_create = zfs_prop_get_int(snap, ZFS_PROP_CREATETXG); 1896 cb.cb_first = B_TRUE; 1897 cb.cb_error = 0; 1898 if ((ret = zfs_iter_children(zhp, rollback_check, &cb)) != 0) 1899 goto out; 1900 1901 if ((ret = cb.cb_error) != 0) 1902 goto out; 1903 1904 /* 1905 * Rollback parent to the given snapshot. 1906 */ 1907 ret = zfs_rollback(zhp, snap, force); 1908 1909 if (!ret) { 1910 zpool_log_history(g_zfs, argc + optind, argv - optind, argv[0], 1911 B_FALSE, B_FALSE); 1912 } 1913 1914 out: 1915 zfs_close(snap); 1916 zfs_close(zhp); 1917 1918 if (ret == 0) 1919 return (0); 1920 else 1921 return (1); 1922 } 1923 1924 /* 1925 * zfs set property=value { fs | snap | vol } ... 1926 * 1927 * Sets the given property for all datasets specified on the command line. 1928 */ 1929 typedef struct set_cbdata { 1930 char *cb_propname; 1931 char *cb_value; 1932 boolean_t cb_any_successful; 1933 } set_cbdata_t; 1934 1935 static int 1936 set_callback(zfs_handle_t *zhp, void *data) 1937 { 1938 set_cbdata_t *cbp = data; 1939 1940 if (zfs_prop_set(zhp, cbp->cb_propname, cbp->cb_value) != 0) { 1941 switch (libzfs_errno(g_zfs)) { 1942 case EZFS_MOUNTFAILED: 1943 (void) fprintf(stderr, gettext("property may be set " 1944 "but unable to remount filesystem\n")); 1945 break; 1946 case EZFS_SHARENFSFAILED: 1947 (void) fprintf(stderr, gettext("property may be set " 1948 "but unable to reshare filesystem\n")); 1949 break; 1950 } 1951 return (1); 1952 } 1953 cbp->cb_any_successful = B_TRUE; 1954 return (0); 1955 } 1956 1957 static int 1958 zfs_do_set(int argc, char **argv) 1959 { 1960 set_cbdata_t cb; 1961 int ret; 1962 1963 /* check for options */ 1964 if (argc > 1 && argv[1][0] == '-') { 1965 (void) fprintf(stderr, gettext("invalid option '%c'\n"), 1966 argv[1][1]); 1967 usage(B_FALSE); 1968 } 1969 1970 /* check number of arguments */ 1971 if (argc < 2) { 1972 (void) fprintf(stderr, gettext("missing property=value " 1973 "argument\n")); 1974 usage(B_FALSE); 1975 } 1976 if (argc < 3) { 1977 (void) fprintf(stderr, gettext("missing dataset name\n")); 1978 usage(B_FALSE); 1979 } 1980 1981 /* validate property=value argument */ 1982 cb.cb_propname = argv[1]; 1983 if ((cb.cb_value = strchr(cb.cb_propname, '=')) == NULL) { 1984 (void) fprintf(stderr, gettext("missing value in " 1985 "property=value argument\n")); 1986 usage(B_FALSE); 1987 } 1988 1989 *cb.cb_value = '\0'; 1990 cb.cb_value++; 1991 cb.cb_any_successful = B_FALSE; 1992 1993 if (*cb.cb_propname == '\0') { 1994 (void) fprintf(stderr, 1995 gettext("missing property in property=value argument\n")); 1996 usage(B_FALSE); 1997 } 1998 1999 ret = zfs_for_each(argc - 2, argv + 2, B_FALSE, 2000 ZFS_TYPE_ANY, NULL, NULL, set_callback, &cb, B_FALSE); 2001 2002 if (cb.cb_any_successful) { 2003 *(cb.cb_value - 1) = '='; 2004 zpool_log_history(g_zfs, argc, argv, argv[2], B_FALSE, B_FALSE); 2005 } 2006 2007 return (ret); 2008 } 2009 2010 /* 2011 * zfs snapshot [-r] <fs@snap> 2012 * 2013 * Creates a snapshot with the given name. While functionally equivalent to 2014 * 'zfs create', it is a separate command to diffferentiate intent. 2015 */ 2016 static int 2017 zfs_do_snapshot(int argc, char **argv) 2018 { 2019 int recursive = B_FALSE; 2020 int ret; 2021 char c; 2022 2023 /* check options */ 2024 while ((c = getopt(argc, argv, ":r")) != -1) { 2025 switch (c) { 2026 case 'r': 2027 recursive = B_TRUE; 2028 break; 2029 case '?': 2030 (void) fprintf(stderr, gettext("invalid option '%c'\n"), 2031 optopt); 2032 usage(B_FALSE); 2033 } 2034 } 2035 2036 argc -= optind; 2037 argv += optind; 2038 2039 /* check number of arguments */ 2040 if (argc < 1) { 2041 (void) fprintf(stderr, gettext("missing snapshot argument\n")); 2042 usage(B_FALSE); 2043 } 2044 if (argc > 1) { 2045 (void) fprintf(stderr, gettext("too many arguments\n")); 2046 usage(B_FALSE); 2047 } 2048 2049 ret = zfs_snapshot(g_zfs, argv[0], recursive); 2050 if (ret && recursive) 2051 (void) fprintf(stderr, gettext("no snapshots were created\n")); 2052 if (!ret) { 2053 zpool_log_history(g_zfs, argc + optind, argv - optind, argv[0], 2054 B_FALSE, B_FALSE); 2055 } 2056 return (ret != 0); 2057 } 2058 2059 /* 2060 * zfs send [-i <@snap>] <fs@snap> 2061 * 2062 * Send a backup stream to stdout. 2063 */ 2064 static int 2065 zfs_do_send(int argc, char **argv) 2066 { 2067 char *fromname = NULL; 2068 char *cp; 2069 zfs_handle_t *zhp; 2070 int c, err; 2071 2072 /* check options */ 2073 while ((c = getopt(argc, argv, ":i:")) != -1) { 2074 switch (c) { 2075 case 'i': 2076 if (fromname) 2077 usage(B_FALSE); 2078 fromname = optarg; 2079 break; 2080 case ':': 2081 (void) fprintf(stderr, gettext("missing argument for " 2082 "'%c' option\n"), optopt); 2083 usage(B_FALSE); 2084 break; 2085 case '?': 2086 (void) fprintf(stderr, gettext("invalid option '%c'\n"), 2087 optopt); 2088 usage(B_FALSE); 2089 } 2090 } 2091 2092 argc -= optind; 2093 argv += optind; 2094 2095 /* check number of arguments */ 2096 if (argc < 1) { 2097 (void) fprintf(stderr, gettext("missing snapshot argument\n")); 2098 usage(B_FALSE); 2099 } 2100 if (argc > 1) { 2101 (void) fprintf(stderr, gettext("too many arguments\n")); 2102 usage(B_FALSE); 2103 } 2104 2105 if (isatty(STDOUT_FILENO)) { 2106 (void) fprintf(stderr, 2107 gettext("Error: Stream can not be written to a terminal.\n" 2108 "You must redirect standard output.\n")); 2109 return (1); 2110 } 2111 2112 if ((zhp = zfs_open(g_zfs, argv[0], ZFS_TYPE_SNAPSHOT)) == NULL) 2113 return (1); 2114 2115 /* 2116 * If they specified the full path to the snapshot, chop off 2117 * everything except the short name of the snapshot. 2118 */ 2119 if (fromname && (cp = strchr(fromname, '@')) != NULL) { 2120 if (cp != fromname && 2121 strncmp(argv[0], fromname, cp - fromname + 1)) { 2122 (void) fprintf(stderr, 2123 gettext("incremental source must be " 2124 "in same filesystem\n")); 2125 usage(B_FALSE); 2126 } 2127 fromname = cp + 1; 2128 if (strchr(fromname, '@') || strchr(fromname, '/')) { 2129 (void) fprintf(stderr, 2130 gettext("invalid incremental source\n")); 2131 usage(B_FALSE); 2132 } 2133 } 2134 2135 err = zfs_send(zhp, fromname, STDOUT_FILENO); 2136 zfs_close(zhp); 2137 2138 return (err != 0); 2139 } 2140 2141 /* 2142 * zfs receive <fs@snap> 2143 * 2144 * Restore a backup stream from stdin. 2145 */ 2146 static int 2147 zfs_do_receive(int argc, char **argv) 2148 { 2149 int c, err; 2150 boolean_t isprefix = B_FALSE; 2151 boolean_t dryrun = B_FALSE; 2152 boolean_t verbose = B_FALSE; 2153 boolean_t force = B_FALSE; 2154 2155 /* check options */ 2156 while ((c = getopt(argc, argv, ":dnvF")) != -1) { 2157 switch (c) { 2158 case 'd': 2159 isprefix = B_TRUE; 2160 break; 2161 case 'n': 2162 dryrun = B_TRUE; 2163 break; 2164 case 'v': 2165 verbose = B_TRUE; 2166 break; 2167 case 'F': 2168 force = B_TRUE; 2169 break; 2170 case ':': 2171 (void) fprintf(stderr, gettext("missing argument for " 2172 "'%c' option\n"), optopt); 2173 usage(B_FALSE); 2174 break; 2175 case '?': 2176 (void) fprintf(stderr, gettext("invalid option '%c'\n"), 2177 optopt); 2178 usage(B_FALSE); 2179 } 2180 } 2181 2182 argc -= optind; 2183 argv += optind; 2184 2185 /* check number of arguments */ 2186 if (argc < 1) { 2187 (void) fprintf(stderr, gettext("missing snapshot argument\n")); 2188 usage(B_FALSE); 2189 } 2190 if (argc > 1) { 2191 (void) fprintf(stderr, gettext("too many arguments\n")); 2192 usage(B_FALSE); 2193 } 2194 2195 if (isatty(STDIN_FILENO)) { 2196 (void) fprintf(stderr, 2197 gettext("Error: Backup stream can not be read " 2198 "from a terminal.\n" 2199 "You must redirect standard input.\n")); 2200 return (1); 2201 } 2202 2203 err = zfs_receive(g_zfs, argv[0], isprefix, verbose, dryrun, force, 2204 STDIN_FILENO); 2205 2206 if (!err) { 2207 zpool_log_history(g_zfs, argc + optind, argv - optind, argv[0], 2208 B_FALSE, B_FALSE); 2209 } 2210 2211 return (err != 0); 2212 } 2213 2214 typedef struct get_all_cbdata { 2215 zfs_handle_t **cb_handles; 2216 size_t cb_alloc; 2217 size_t cb_used; 2218 uint_t cb_types; 2219 } get_all_cbdata_t; 2220 2221 static int 2222 get_one_dataset(zfs_handle_t *zhp, void *data) 2223 { 2224 get_all_cbdata_t *cbp = data; 2225 zfs_type_t type = zfs_get_type(zhp); 2226 2227 /* 2228 * Interate over any nested datasets. 2229 */ 2230 if (type == ZFS_TYPE_FILESYSTEM && 2231 zfs_iter_filesystems(zhp, get_one_dataset, data) != 0) { 2232 zfs_close(zhp); 2233 return (1); 2234 } 2235 2236 /* 2237 * Skip any datasets whose type does not match. 2238 */ 2239 if ((type & cbp->cb_types) == 0) { 2240 zfs_close(zhp); 2241 return (0); 2242 } 2243 2244 if (cbp->cb_alloc == cbp->cb_used) { 2245 zfs_handle_t **handles; 2246 2247 if (cbp->cb_alloc == 0) 2248 cbp->cb_alloc = 64; 2249 else 2250 cbp->cb_alloc *= 2; 2251 2252 handles = safe_malloc(cbp->cb_alloc * sizeof (void *)); 2253 2254 if (cbp->cb_handles) { 2255 bcopy(cbp->cb_handles, handles, 2256 cbp->cb_used * sizeof (void *)); 2257 free(cbp->cb_handles); 2258 } 2259 2260 cbp->cb_handles = handles; 2261 } 2262 2263 cbp->cb_handles[cbp->cb_used++] = zhp; 2264 2265 return (0); 2266 } 2267 2268 static void 2269 get_all_datasets(uint_t types, zfs_handle_t ***dslist, size_t *count) 2270 { 2271 get_all_cbdata_t cb = { 0 }; 2272 cb.cb_types = types; 2273 2274 (void) zfs_iter_root(g_zfs, get_one_dataset, &cb); 2275 2276 *dslist = cb.cb_handles; 2277 *count = cb.cb_used; 2278 } 2279 2280 static int 2281 dataset_cmp(const void *a, const void *b) 2282 { 2283 zfs_handle_t **za = (zfs_handle_t **)a; 2284 zfs_handle_t **zb = (zfs_handle_t **)b; 2285 char mounta[MAXPATHLEN]; 2286 char mountb[MAXPATHLEN]; 2287 boolean_t gota, gotb; 2288 2289 if ((gota = (zfs_get_type(*za) == ZFS_TYPE_FILESYSTEM)) != 0) 2290 verify(zfs_prop_get(*za, ZFS_PROP_MOUNTPOINT, mounta, 2291 sizeof (mounta), NULL, NULL, 0, B_FALSE) == 0); 2292 if ((gotb = (zfs_get_type(*zb) == ZFS_TYPE_FILESYSTEM)) != 0) 2293 verify(zfs_prop_get(*zb, ZFS_PROP_MOUNTPOINT, mountb, 2294 sizeof (mountb), NULL, NULL, 0, B_FALSE) == 0); 2295 2296 if (gota && gotb) 2297 return (strcmp(mounta, mountb)); 2298 2299 if (gota) 2300 return (-1); 2301 if (gotb) 2302 return (1); 2303 2304 return (strcmp(zfs_get_name(a), zfs_get_name(b))); 2305 } 2306 2307 /* 2308 * Generic callback for sharing or mounting filesystems. Because the code is so 2309 * similar, we have a common function with an extra parameter to determine which 2310 * mode we are using. 2311 */ 2312 #define OP_SHARE 0x1 2313 #define OP_MOUNT 0x2 2314 2315 /* 2316 * Share or mount a dataset. 2317 */ 2318 static int 2319 share_mount_one(zfs_handle_t *zhp, int op, int flags, boolean_t explicit, 2320 const char *options) 2321 { 2322 char mountpoint[ZFS_MAXPROPLEN]; 2323 char shareopts[ZFS_MAXPROPLEN]; 2324 const char *cmdname = op == OP_SHARE ? "share" : "mount"; 2325 struct mnttab mnt; 2326 uint64_t zoned, canmount; 2327 zfs_type_t type = zfs_get_type(zhp); 2328 2329 assert(type & (ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME)); 2330 2331 if (type == ZFS_TYPE_FILESYSTEM) { 2332 /* 2333 * Check to make sure we can mount/share this dataset. If we 2334 * are in the global zone and the filesystem is exported to a 2335 * local zone, or if we are in a local zone and the 2336 * filesystem is not exported, then it is an error. 2337 */ 2338 zoned = zfs_prop_get_int(zhp, ZFS_PROP_ZONED); 2339 2340 if (zoned && getzoneid() == GLOBAL_ZONEID) { 2341 if (!explicit) 2342 return (0); 2343 2344 (void) fprintf(stderr, gettext("cannot %s '%s': " 2345 "dataset is exported to a local zone\n"), cmdname, 2346 zfs_get_name(zhp)); 2347 return (1); 2348 2349 } else if (!zoned && getzoneid() != GLOBAL_ZONEID) { 2350 if (!explicit) 2351 return (0); 2352 2353 (void) fprintf(stderr, gettext("cannot %s '%s': " 2354 "permission denied\n"), cmdname, 2355 zfs_get_name(zhp)); 2356 return (1); 2357 } 2358 2359 /* 2360 * Ignore any filesystems which don't apply to us. This 2361 * includes those with a legacy mountpoint, or those with 2362 * legacy share options. 2363 */ 2364 verify(zfs_prop_get(zhp, ZFS_PROP_MOUNTPOINT, mountpoint, 2365 sizeof (mountpoint), NULL, NULL, 0, B_FALSE) == 0); 2366 verify(zfs_prop_get(zhp, ZFS_PROP_SHARENFS, shareopts, 2367 sizeof (shareopts), NULL, NULL, 0, B_FALSE) == 0); 2368 canmount = zfs_prop_get_int(zhp, ZFS_PROP_CANMOUNT); 2369 2370 if (op == OP_SHARE && strcmp(shareopts, "off") == 0) { 2371 if (!explicit) 2372 return (0); 2373 2374 (void) fprintf(stderr, gettext("cannot share '%s': " 2375 "legacy share\n"), zfs_get_name(zhp)); 2376 (void) fprintf(stderr, gettext("use share(1M) to " 2377 "share this filesystem\n")); 2378 return (1); 2379 } 2380 2381 /* 2382 * We cannot share or mount legacy filesystems. If the 2383 * shareopts is non-legacy but the mountpoint is legacy, we 2384 * treat it as a legacy share. 2385 */ 2386 if (strcmp(mountpoint, "legacy") == 0) { 2387 if (!explicit) 2388 return (0); 2389 2390 (void) fprintf(stderr, gettext("cannot %s '%s': " 2391 "legacy mountpoint\n"), cmdname, zfs_get_name(zhp)); 2392 (void) fprintf(stderr, gettext("use %s to " 2393 "%s this filesystem\n"), op == OP_SHARE ? 2394 "share(1M)" : "mount(1M)", cmdname); 2395 return (1); 2396 } 2397 2398 if (strcmp(mountpoint, "none") == 0) { 2399 if (!explicit) 2400 return (0); 2401 2402 (void) fprintf(stderr, gettext("cannot %s '%s': no " 2403 "mountpoint set\n"), cmdname, zfs_get_name(zhp)); 2404 return (1); 2405 } 2406 2407 if (!canmount) { 2408 if (!explicit) 2409 return (0); 2410 2411 (void) fprintf(stderr, gettext("cannot %s '%s': " 2412 "'canmount' property is set to 'off'\n"), cmdname, 2413 zfs_get_name(zhp)); 2414 return (1); 2415 } 2416 2417 /* 2418 * At this point, we have verified that the mountpoint and/or 2419 * shareopts are appropriate for auto management. If the 2420 * filesystem is already mounted or shared, return (failing 2421 * for explicit requests); otherwise mount or share the 2422 * filesystem. 2423 */ 2424 switch (op) { 2425 case OP_SHARE: 2426 if (zfs_is_shared_nfs(zhp, NULL)) { 2427 if (!explicit) 2428 return (0); 2429 2430 (void) fprintf(stderr, gettext("cannot share " 2431 "'%s': filesystem already shared\n"), 2432 zfs_get_name(zhp)); 2433 return (1); 2434 } 2435 2436 if (!zfs_is_mounted(zhp, NULL) && 2437 zfs_mount(zhp, NULL, 0) != 0) 2438 return (1); 2439 2440 if (zfs_share_nfs(zhp) != 0) 2441 return (1); 2442 break; 2443 2444 case OP_MOUNT: 2445 if (options == NULL) 2446 mnt.mnt_mntopts = ""; 2447 else 2448 mnt.mnt_mntopts = (char *)options; 2449 2450 if (!hasmntopt(&mnt, MNTOPT_REMOUNT) && 2451 zfs_is_mounted(zhp, NULL)) { 2452 if (!explicit) 2453 return (0); 2454 2455 (void) fprintf(stderr, gettext("cannot mount " 2456 "'%s': filesystem already mounted\n"), 2457 zfs_get_name(zhp)); 2458 return (1); 2459 } 2460 2461 if (zfs_mount(zhp, options, flags) != 0) 2462 return (1); 2463 break; 2464 } 2465 } else { 2466 assert(op == OP_SHARE); 2467 2468 /* 2469 * Ignore any volumes that aren't shared. 2470 */ 2471 verify(zfs_prop_get(zhp, ZFS_PROP_SHAREISCSI, shareopts, 2472 sizeof (shareopts), NULL, NULL, 0, B_FALSE) == 0); 2473 2474 if (strcmp(shareopts, "off") == 0) { 2475 if (!explicit) 2476 return (0); 2477 2478 (void) fprintf(stderr, gettext("cannot share '%s': " 2479 "'shareiscsi' property not set\n"), 2480 zfs_get_name(zhp)); 2481 (void) fprintf(stderr, gettext("set 'shareiscsi' " 2482 "property or use iscsitadm(1M) to share this " 2483 "volume\n")); 2484 return (1); 2485 } 2486 2487 if (zfs_is_shared_iscsi(zhp)) { 2488 if (!explicit) 2489 return (0); 2490 2491 (void) fprintf(stderr, gettext("cannot share " 2492 "'%s': volume already shared\n"), 2493 zfs_get_name(zhp)); 2494 return (1); 2495 } 2496 2497 if (zfs_share_iscsi(zhp) != 0) 2498 return (1); 2499 } 2500 2501 return (0); 2502 } 2503 2504 static int 2505 share_mount(int op, int argc, char **argv) 2506 { 2507 int do_all = 0; 2508 int c, ret = 0; 2509 const char *options = NULL; 2510 int types, flags = 0; 2511 2512 /* check options */ 2513 while ((c = getopt(argc, argv, op == OP_MOUNT ? ":ao:O" : "a")) 2514 != -1) { 2515 switch (c) { 2516 case 'a': 2517 do_all = 1; 2518 break; 2519 case 'o': 2520 options = optarg; 2521 break; 2522 case 'O': 2523 flags |= MS_OVERLAY; 2524 break; 2525 case ':': 2526 (void) fprintf(stderr, gettext("missing argument for " 2527 "'%c' option\n"), optopt); 2528 usage(B_FALSE); 2529 break; 2530 case '?': 2531 (void) fprintf(stderr, gettext("invalid option '%c'\n"), 2532 optopt); 2533 usage(B_FALSE); 2534 } 2535 } 2536 2537 argc -= optind; 2538 argv += optind; 2539 2540 /* check number of arguments */ 2541 if (do_all) { 2542 zfs_handle_t **dslist = NULL; 2543 size_t i, count = 0; 2544 2545 if (op == OP_MOUNT) { 2546 types = ZFS_TYPE_FILESYSTEM; 2547 } else if (argc > 0) { 2548 if (strcmp(argv[0], "nfs") == 0) { 2549 types = ZFS_TYPE_FILESYSTEM; 2550 } else if (strcmp(argv[0], "iscsi") == 0) { 2551 types = ZFS_TYPE_VOLUME; 2552 } else { 2553 (void) fprintf(stderr, gettext("share type " 2554 "must be 'nfs' or 'iscsi'\n")); 2555 usage(B_FALSE); 2556 } 2557 2558 argc--; 2559 argv++; 2560 } else { 2561 types = ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME; 2562 } 2563 2564 if (argc != 0) { 2565 (void) fprintf(stderr, gettext("too many arguments\n")); 2566 usage(B_FALSE); 2567 } 2568 2569 get_all_datasets(types, &dslist, &count); 2570 2571 if (count == 0) 2572 return (0); 2573 2574 qsort(dslist, count, sizeof (void *), dataset_cmp); 2575 2576 for (i = 0; i < count; i++) { 2577 if (share_mount_one(dslist[i], op, flags, B_FALSE, 2578 options) != 0) 2579 ret = 1; 2580 zfs_close(dslist[i]); 2581 } 2582 2583 free(dslist); 2584 } else if (argc == 0) { 2585 struct mnttab entry; 2586 2587 if (op == OP_SHARE) { 2588 (void) fprintf(stderr, gettext("missing filesystem " 2589 "argument\n")); 2590 usage(B_FALSE); 2591 } 2592 2593 /* 2594 * When mount is given no arguments, go through /etc/mnttab and 2595 * display any active ZFS mounts. We hide any snapshots, since 2596 * they are controlled automatically. 2597 */ 2598 rewind(mnttab_file); 2599 while (getmntent(mnttab_file, &entry) == 0) { 2600 if (strcmp(entry.mnt_fstype, MNTTYPE_ZFS) != 0 || 2601 strchr(entry.mnt_special, '@') != NULL) 2602 continue; 2603 2604 (void) printf("%-30s %s\n", entry.mnt_special, 2605 entry.mnt_mountp); 2606 } 2607 2608 } else { 2609 zfs_handle_t *zhp; 2610 2611 types = ZFS_TYPE_FILESYSTEM; 2612 if (op == OP_SHARE) 2613 types |= ZFS_TYPE_VOLUME; 2614 2615 if (argc > 1) { 2616 (void) fprintf(stderr, 2617 gettext("too many arguments\n")); 2618 usage(B_FALSE); 2619 } 2620 2621 if ((zhp = zfs_open(g_zfs, argv[0], types)) == NULL) { 2622 ret = 1; 2623 } else { 2624 ret = share_mount_one(zhp, op, flags, B_TRUE, 2625 options); 2626 zfs_close(zhp); 2627 } 2628 } 2629 2630 return (ret); 2631 } 2632 2633 /* 2634 * zfs mount -a [nfs | iscsi] 2635 * zfs mount filesystem 2636 * 2637 * Mount all filesystems, or mount the given filesystem. 2638 */ 2639 static int 2640 zfs_do_mount(int argc, char **argv) 2641 { 2642 return (share_mount(OP_MOUNT, argc, argv)); 2643 } 2644 2645 /* 2646 * zfs share -a [nfs | iscsi] 2647 * zfs share filesystem 2648 * 2649 * Share all filesystems, or share the given filesystem. 2650 */ 2651 static int 2652 zfs_do_share(int argc, char **argv) 2653 { 2654 return (share_mount(OP_SHARE, argc, argv)); 2655 } 2656 2657 typedef struct unshare_unmount_node { 2658 zfs_handle_t *un_zhp; 2659 char *un_mountp; 2660 uu_avl_node_t un_avlnode; 2661 } unshare_unmount_node_t; 2662 2663 /* ARGSUSED */ 2664 static int 2665 unshare_unmount_compare(const void *larg, const void *rarg, void *unused) 2666 { 2667 const unshare_unmount_node_t *l = larg; 2668 const unshare_unmount_node_t *r = rarg; 2669 2670 return (strcmp(l->un_mountp, r->un_mountp)); 2671 } 2672 2673 /* 2674 * Convenience routine used by zfs_do_umount() and manual_unmount(). Given an 2675 * absolute path, find the entry /etc/mnttab, verify that its a ZFS filesystem, 2676 * and unmount it appropriately. 2677 */ 2678 static int 2679 unshare_unmount_path(int op, char *path, int flags, boolean_t is_manual) 2680 { 2681 zfs_handle_t *zhp; 2682 int ret; 2683 struct stat64 statbuf; 2684 struct extmnttab entry; 2685 const char *cmdname = (op == OP_SHARE) ? "unshare" : "unmount"; 2686 char property[ZFS_MAXPROPLEN]; 2687 2688 /* 2689 * Search for the path in /etc/mnttab. Rather than looking for the 2690 * specific path, which can be fooled by non-standard paths (i.e. ".." 2691 * or "//"), we stat() the path and search for the corresponding 2692 * (major,minor) device pair. 2693 */ 2694 if (stat64(path, &statbuf) != 0) { 2695 (void) fprintf(stderr, gettext("cannot %s '%s': %s\n"), 2696 cmdname, path, strerror(errno)); 2697 return (1); 2698 } 2699 2700 /* 2701 * Search for the given (major,minor) pair in the mount table. 2702 */ 2703 rewind(mnttab_file); 2704 while ((ret = getextmntent(mnttab_file, &entry, 0)) == 0) { 2705 if (entry.mnt_major == major(statbuf.st_dev) && 2706 entry.mnt_minor == minor(statbuf.st_dev)) 2707 break; 2708 } 2709 if (ret != 0) { 2710 (void) fprintf(stderr, gettext("cannot %s '%s': not " 2711 "currently mounted\n"), cmdname, path); 2712 return (1); 2713 } 2714 2715 if (strcmp(entry.mnt_fstype, MNTTYPE_ZFS) != 0) { 2716 (void) fprintf(stderr, gettext("cannot %s '%s': not a ZFS " 2717 "filesystem\n"), cmdname, path); 2718 return (1); 2719 } 2720 2721 if ((zhp = zfs_open(g_zfs, entry.mnt_special, 2722 ZFS_TYPE_FILESYSTEM)) == NULL) 2723 return (1); 2724 2725 verify(zfs_prop_get(zhp, op == OP_SHARE ? 2726 ZFS_PROP_SHARENFS : ZFS_PROP_MOUNTPOINT, property, 2727 sizeof (property), NULL, NULL, 0, B_FALSE) == 0); 2728 2729 if (op == OP_SHARE) { 2730 if (strcmp(property, "off") == 0) { 2731 (void) fprintf(stderr, gettext("cannot unshare " 2732 "'%s': legacy share\n"), path); 2733 (void) fprintf(stderr, gettext("use " 2734 "unshare(1M) to unshare this filesystem\n")); 2735 ret = 1; 2736 } else if (!zfs_is_shared_nfs(zhp, NULL)) { 2737 (void) fprintf(stderr, gettext("cannot unshare '%s': " 2738 "not currently shared\n"), path); 2739 ret = 1; 2740 } else { 2741 ret = zfs_unshareall_nfs(zhp); 2742 } 2743 } else { 2744 if (is_manual) { 2745 ret = zfs_unmount(zhp, NULL, flags); 2746 } else if (strcmp(property, "legacy") == 0) { 2747 (void) fprintf(stderr, gettext("cannot unmount " 2748 "'%s': legacy mountpoint\n"), 2749 zfs_get_name(zhp)); 2750 (void) fprintf(stderr, gettext("use umount(1M) " 2751 "to unmount this filesystem\n")); 2752 ret = 1; 2753 } else { 2754 ret = zfs_unmountall(zhp, flags); 2755 } 2756 } 2757 2758 zfs_close(zhp); 2759 2760 return (ret != 0); 2761 } 2762 2763 /* 2764 * Generic callback for unsharing or unmounting a filesystem. 2765 */ 2766 static int 2767 unshare_unmount(int op, int argc, char **argv) 2768 { 2769 int do_all = 0; 2770 int flags = 0; 2771 int ret = 0; 2772 int types, c; 2773 zfs_handle_t *zhp; 2774 char property[ZFS_MAXPROPLEN]; 2775 2776 /* check options */ 2777 while ((c = getopt(argc, argv, op == OP_SHARE ? "a" : "af")) != -1) { 2778 switch (c) { 2779 case 'a': 2780 do_all = 1; 2781 break; 2782 case 'f': 2783 flags = MS_FORCE; 2784 break; 2785 case '?': 2786 (void) fprintf(stderr, gettext("invalid option '%c'\n"), 2787 optopt); 2788 usage(B_FALSE); 2789 } 2790 } 2791 2792 argc -= optind; 2793 argv += optind; 2794 2795 if (do_all) { 2796 /* 2797 * We could make use of zfs_for_each() to walk all datasets in 2798 * the system, but this would be very inefficient, especially 2799 * since we would have to linearly search /etc/mnttab for each 2800 * one. Instead, do one pass through /etc/mnttab looking for 2801 * zfs entries and call zfs_unmount() for each one. 2802 * 2803 * Things get a little tricky if the administrator has created 2804 * mountpoints beneath other ZFS filesystems. In this case, we 2805 * have to unmount the deepest filesystems first. To accomplish 2806 * this, we place all the mountpoints in an AVL tree sorted by 2807 * the special type (dataset name), and walk the result in 2808 * reverse to make sure to get any snapshots first. 2809 */ 2810 struct mnttab entry; 2811 uu_avl_pool_t *pool; 2812 uu_avl_t *tree; 2813 unshare_unmount_node_t *node; 2814 uu_avl_index_t idx; 2815 uu_avl_walk_t *walk; 2816 2817 if (argc != 0) { 2818 (void) fprintf(stderr, gettext("too many arguments\n")); 2819 usage(B_FALSE); 2820 } 2821 2822 if ((pool = uu_avl_pool_create("unmount_pool", 2823 sizeof (unshare_unmount_node_t), 2824 offsetof(unshare_unmount_node_t, un_avlnode), 2825 unshare_unmount_compare, 2826 UU_DEFAULT)) == NULL) { 2827 (void) fprintf(stderr, gettext("internal error: " 2828 "out of memory\n")); 2829 exit(1); 2830 } 2831 2832 if ((tree = uu_avl_create(pool, NULL, UU_DEFAULT)) == NULL) { 2833 (void) fprintf(stderr, gettext("internal error: " 2834 "out of memory\n")); 2835 exit(1); 2836 } 2837 2838 rewind(mnttab_file); 2839 while (getmntent(mnttab_file, &entry) == 0) { 2840 2841 /* ignore non-ZFS entries */ 2842 if (strcmp(entry.mnt_fstype, MNTTYPE_ZFS) != 0) 2843 continue; 2844 2845 /* ignore snapshots */ 2846 if (strchr(entry.mnt_special, '@') != NULL) 2847 continue; 2848 2849 if ((zhp = zfs_open(g_zfs, entry.mnt_special, 2850 ZFS_TYPE_FILESYSTEM)) == NULL) { 2851 ret = 1; 2852 continue; 2853 } 2854 2855 verify(zfs_prop_get(zhp, op == OP_SHARE ? 2856 ZFS_PROP_SHARENFS : ZFS_PROP_MOUNTPOINT, 2857 property, sizeof (property), NULL, NULL, 2858 0, B_FALSE) == 0); 2859 2860 /* Ignore legacy mounts and shares */ 2861 if ((op == OP_SHARE && 2862 strcmp(property, "off") == 0) || 2863 (op == OP_MOUNT && 2864 strcmp(property, "legacy") == 0)) { 2865 zfs_close(zhp); 2866 continue; 2867 } 2868 2869 node = safe_malloc(sizeof (unshare_unmount_node_t)); 2870 node->un_zhp = zhp; 2871 2872 if ((node->un_mountp = strdup(entry.mnt_mountp)) == 2873 NULL) { 2874 (void) fprintf(stderr, gettext("internal error:" 2875 " out of memory\n")); 2876 exit(1); 2877 } 2878 2879 uu_avl_node_init(node, &node->un_avlnode, pool); 2880 2881 if (uu_avl_find(tree, node, NULL, &idx) == NULL) { 2882 uu_avl_insert(tree, node, idx); 2883 } else { 2884 zfs_close(node->un_zhp); 2885 free(node->un_mountp); 2886 free(node); 2887 } 2888 } 2889 2890 /* 2891 * Walk the AVL tree in reverse, unmounting each filesystem and 2892 * removing it from the AVL tree in the process. 2893 */ 2894 if ((walk = uu_avl_walk_start(tree, 2895 UU_WALK_REVERSE | UU_WALK_ROBUST)) == NULL) { 2896 (void) fprintf(stderr, 2897 gettext("internal error: out of memory")); 2898 exit(1); 2899 } 2900 2901 while ((node = uu_avl_walk_next(walk)) != NULL) { 2902 uu_avl_remove(tree, node); 2903 2904 switch (op) { 2905 case OP_SHARE: 2906 if (zfs_unshare_nfs(node->un_zhp, 2907 node->un_mountp) != 0) 2908 ret = 1; 2909 break; 2910 2911 case OP_MOUNT: 2912 if (zfs_unmount(node->un_zhp, 2913 node->un_mountp, flags) != 0) 2914 ret = 1; 2915 break; 2916 } 2917 2918 zfs_close(node->un_zhp); 2919 free(node->un_mountp); 2920 free(node); 2921 } 2922 2923 uu_avl_walk_end(walk); 2924 uu_avl_destroy(tree); 2925 uu_avl_pool_destroy(pool); 2926 2927 if (op == OP_SHARE) { 2928 /* 2929 * Finally, unshare any volumes shared via iSCSI. 2930 */ 2931 zfs_handle_t **dslist = NULL; 2932 size_t i, count = 0; 2933 2934 get_all_datasets(ZFS_TYPE_VOLUME, &dslist, &count); 2935 2936 if (count != 0) { 2937 qsort(dslist, count, sizeof (void *), 2938 dataset_cmp); 2939 2940 for (i = 0; i < count; i++) { 2941 if (zfs_unshare_iscsi(dslist[i]) != 0) 2942 ret = 1; 2943 zfs_close(dslist[i]); 2944 } 2945 2946 free(dslist); 2947 } 2948 } 2949 } else { 2950 if (argc != 1) { 2951 if (argc == 0) 2952 (void) fprintf(stderr, 2953 gettext("missing filesystem argument\n")); 2954 else 2955 (void) fprintf(stderr, 2956 gettext("too many arguments\n")); 2957 usage(B_FALSE); 2958 } 2959 2960 /* 2961 * We have an argument, but it may be a full path or a ZFS 2962 * filesystem. Pass full paths off to unmount_path() (shared by 2963 * manual_unmount), otherwise open the filesystem and pass to 2964 * zfs_unmount(). 2965 */ 2966 if (argv[0][0] == '/') 2967 return (unshare_unmount_path(op, argv[0], 2968 flags, B_FALSE)); 2969 2970 types = ZFS_TYPE_FILESYSTEM; 2971 if (op == OP_SHARE) 2972 types |= ZFS_TYPE_VOLUME; 2973 2974 if ((zhp = zfs_open(g_zfs, argv[0], types)) == NULL) 2975 return (1); 2976 2977 if (zfs_get_type(zhp) == ZFS_TYPE_FILESYSTEM) { 2978 verify(zfs_prop_get(zhp, op == OP_SHARE ? 2979 ZFS_PROP_SHARENFS : ZFS_PROP_MOUNTPOINT, property, 2980 sizeof (property), NULL, NULL, 0, B_FALSE) == 0); 2981 2982 switch (op) { 2983 case OP_SHARE: 2984 if (strcmp(property, "off") == 0) { 2985 (void) fprintf(stderr, gettext("cannot " 2986 "unshare '%s': legacy share\n"), 2987 zfs_get_name(zhp)); 2988 (void) fprintf(stderr, gettext("use " 2989 "unshare(1M) to unshare this " 2990 "filesystem\n")); 2991 ret = 1; 2992 } else if (!zfs_is_shared_nfs(zhp, NULL)) { 2993 (void) fprintf(stderr, gettext("cannot " 2994 "unshare '%s': not currently " 2995 "shared\n"), zfs_get_name(zhp)); 2996 ret = 1; 2997 } else if (zfs_unshareall_nfs(zhp) != 0) { 2998 ret = 1; 2999 } 3000 break; 3001 3002 case OP_MOUNT: 3003 if (strcmp(property, "legacy") == 0) { 3004 (void) fprintf(stderr, gettext("cannot " 3005 "unmount '%s': legacy " 3006 "mountpoint\n"), zfs_get_name(zhp)); 3007 (void) fprintf(stderr, gettext("use " 3008 "umount(1M) to unmount this " 3009 "filesystem\n")); 3010 ret = 1; 3011 } else if (!zfs_is_mounted(zhp, NULL)) { 3012 (void) fprintf(stderr, gettext("cannot " 3013 "unmount '%s': not currently " 3014 "mounted\n"), 3015 zfs_get_name(zhp)); 3016 ret = 1; 3017 } else if (zfs_unmountall(zhp, flags) != 0) { 3018 ret = 1; 3019 } 3020 break; 3021 } 3022 } else { 3023 assert(op == OP_SHARE); 3024 3025 verify(zfs_prop_get(zhp, ZFS_PROP_SHAREISCSI, property, 3026 sizeof (property), NULL, NULL, 0, B_FALSE) == 0); 3027 3028 if (strcmp(property, "off") == 0) { 3029 (void) fprintf(stderr, gettext("cannot unshare " 3030 "'%s': 'shareiscsi' property not set\n"), 3031 zfs_get_name(zhp)); 3032 (void) fprintf(stderr, gettext("set " 3033 "'shareiscsi' property or use " 3034 "iscsitadm(1M) to share this volume\n")); 3035 ret = 1; 3036 } else if (!zfs_is_shared_iscsi(zhp)) { 3037 (void) fprintf(stderr, gettext("cannot " 3038 "unshare '%s': not currently shared\n"), 3039 zfs_get_name(zhp)); 3040 ret = 1; 3041 } else if (zfs_unshare_iscsi(zhp) != 0) { 3042 ret = 1; 3043 } 3044 } 3045 3046 zfs_close(zhp); 3047 } 3048 3049 return (ret); 3050 } 3051 3052 /* 3053 * zfs unmount -a 3054 * zfs unmount filesystem 3055 * 3056 * Unmount all filesystems, or a specific ZFS filesystem. 3057 */ 3058 static int 3059 zfs_do_unmount(int argc, char **argv) 3060 { 3061 return (unshare_unmount(OP_MOUNT, argc, argv)); 3062 } 3063 3064 /* 3065 * zfs unshare -a 3066 * zfs unshare filesystem 3067 * 3068 * Unshare all filesystems, or a specific ZFS filesystem. 3069 */ 3070 static int 3071 zfs_do_unshare(int argc, char **argv) 3072 { 3073 return (unshare_unmount(OP_SHARE, argc, argv)); 3074 } 3075 3076 /* 3077 * Called when invoked as /etc/fs/zfs/mount. Do the mount if the mountpoint is 3078 * 'legacy'. Otherwise, complain that use should be using 'zfs mount'. 3079 */ 3080 static int 3081 manual_mount(int argc, char **argv) 3082 { 3083 zfs_handle_t *zhp; 3084 char mountpoint[ZFS_MAXPROPLEN]; 3085 char mntopts[MNT_LINE_MAX] = { '\0' }; 3086 int ret; 3087 int c; 3088 int flags = 0; 3089 char *dataset, *path; 3090 3091 /* check options */ 3092 while ((c = getopt(argc, argv, ":mo:O")) != -1) { 3093 switch (c) { 3094 case 'o': 3095 (void) strlcpy(mntopts, optarg, sizeof (mntopts)); 3096 break; 3097 case 'O': 3098 flags |= MS_OVERLAY; 3099 break; 3100 case 'm': 3101 flags |= MS_NOMNTTAB; 3102 break; 3103 case ':': 3104 (void) fprintf(stderr, gettext("missing argument for " 3105 "'%c' option\n"), optopt); 3106 usage(B_FALSE); 3107 break; 3108 case '?': 3109 (void) fprintf(stderr, gettext("invalid option '%c'\n"), 3110 optopt); 3111 (void) fprintf(stderr, gettext("usage: mount [-o opts] " 3112 "<path>\n")); 3113 return (2); 3114 } 3115 } 3116 3117 argc -= optind; 3118 argv += optind; 3119 3120 /* check that we only have two arguments */ 3121 if (argc != 2) { 3122 if (argc == 0) 3123 (void) fprintf(stderr, gettext("missing dataset " 3124 "argument\n")); 3125 else if (argc == 1) 3126 (void) fprintf(stderr, 3127 gettext("missing mountpoint argument\n")); 3128 else 3129 (void) fprintf(stderr, gettext("too many arguments\n")); 3130 (void) fprintf(stderr, "usage: mount <dataset> <mountpoint>\n"); 3131 return (2); 3132 } 3133 3134 dataset = argv[0]; 3135 path = argv[1]; 3136 3137 /* try to open the dataset */ 3138 if ((zhp = zfs_open(g_zfs, dataset, ZFS_TYPE_FILESYSTEM)) == NULL) 3139 return (1); 3140 3141 (void) zfs_prop_get(zhp, ZFS_PROP_MOUNTPOINT, mountpoint, 3142 sizeof (mountpoint), NULL, NULL, 0, B_FALSE); 3143 3144 /* check for legacy mountpoint and complain appropriately */ 3145 ret = 0; 3146 if (strcmp(mountpoint, ZFS_MOUNTPOINT_LEGACY) == 0) { 3147 if (mount(dataset, path, MS_OPTIONSTR | flags, MNTTYPE_ZFS, 3148 NULL, 0, mntopts, sizeof (mntopts)) != 0) { 3149 (void) fprintf(stderr, gettext("mount failed: %s\n"), 3150 strerror(errno)); 3151 ret = 1; 3152 } 3153 } else { 3154 (void) fprintf(stderr, gettext("filesystem '%s' cannot be " 3155 "mounted using 'mount -F zfs'\n"), dataset); 3156 (void) fprintf(stderr, gettext("Use 'zfs set mountpoint=%s' " 3157 "instead.\n"), path); 3158 (void) fprintf(stderr, gettext("If you must use 'mount -F zfs' " 3159 "or /etc/vfstab, use 'zfs set mountpoint=legacy'.\n")); 3160 (void) fprintf(stderr, gettext("See zfs(1M) for more " 3161 "information.\n")); 3162 ret = 1; 3163 } 3164 3165 return (ret); 3166 } 3167 3168 /* 3169 * Called when invoked as /etc/fs/zfs/umount. Unlike a manual mount, we allow 3170 * unmounts of non-legacy filesystems, as this is the dominant administrative 3171 * interface. 3172 */ 3173 static int 3174 manual_unmount(int argc, char **argv) 3175 { 3176 int flags = 0; 3177 int c; 3178 3179 /* check options */ 3180 while ((c = getopt(argc, argv, "f")) != -1) { 3181 switch (c) { 3182 case 'f': 3183 flags = MS_FORCE; 3184 break; 3185 case '?': 3186 (void) fprintf(stderr, gettext("invalid option '%c'\n"), 3187 optopt); 3188 (void) fprintf(stderr, gettext("usage: unmount [-f] " 3189 "<path>\n")); 3190 return (2); 3191 } 3192 } 3193 3194 argc -= optind; 3195 argv += optind; 3196 3197 /* check arguments */ 3198 if (argc != 1) { 3199 if (argc == 0) 3200 (void) fprintf(stderr, gettext("missing path " 3201 "argument\n")); 3202 else 3203 (void) fprintf(stderr, gettext("too many arguments\n")); 3204 (void) fprintf(stderr, gettext("usage: unmount [-f] <path>\n")); 3205 return (2); 3206 } 3207 3208 return (unshare_unmount_path(OP_MOUNT, argv[0], flags, B_TRUE)); 3209 } 3210 3211 static int 3212 volcheck(zpool_handle_t *zhp, void *data) 3213 { 3214 boolean_t isinit = *((boolean_t *)data); 3215 3216 if (isinit) 3217 return (zpool_create_zvol_links(zhp)); 3218 else 3219 return (zpool_remove_zvol_links(zhp)); 3220 } 3221 3222 /* 3223 * Iterate over all pools in the system and either create or destroy /dev/zvol 3224 * links, depending on the value of 'isinit'. 3225 */ 3226 static int 3227 do_volcheck(boolean_t isinit) 3228 { 3229 return (zpool_iter(g_zfs, volcheck, &isinit) ? 1 : 0); 3230 } 3231 3232 int 3233 main(int argc, char **argv) 3234 { 3235 int ret; 3236 int i; 3237 char *progname; 3238 char *cmdname; 3239 3240 (void) setlocale(LC_ALL, ""); 3241 (void) textdomain(TEXT_DOMAIN); 3242 3243 opterr = 0; 3244 3245 if ((g_zfs = libzfs_init()) == NULL) { 3246 (void) fprintf(stderr, gettext("internal error: failed to " 3247 "initialize ZFS library\n")); 3248 return (1); 3249 } 3250 3251 libzfs_print_on_error(g_zfs, B_TRUE); 3252 3253 if ((mnttab_file = fopen(MNTTAB, "r")) == NULL) { 3254 (void) fprintf(stderr, gettext("internal error: unable to " 3255 "open %s\n"), MNTTAB); 3256 return (1); 3257 } 3258 3259 /* 3260 * This command also doubles as the /etc/fs mount and unmount program. 3261 * Determine if we should take this behavior based on argv[0]. 3262 */ 3263 progname = basename(argv[0]); 3264 if (strcmp(progname, "mount") == 0) { 3265 ret = manual_mount(argc, argv); 3266 } else if (strcmp(progname, "umount") == 0) { 3267 ret = manual_unmount(argc, argv); 3268 } else { 3269 /* 3270 * Make sure the user has specified some command. 3271 */ 3272 if (argc < 2) { 3273 (void) fprintf(stderr, gettext("missing command\n")); 3274 usage(B_FALSE); 3275 } 3276 3277 cmdname = argv[1]; 3278 3279 /* 3280 * The 'umount' command is an alias for 'unmount' 3281 */ 3282 if (strcmp(cmdname, "umount") == 0) 3283 cmdname = "unmount"; 3284 3285 /* 3286 * The 'recv' command is an alias for 'receive' 3287 */ 3288 if (strcmp(cmdname, "recv") == 0) 3289 cmdname = "receive"; 3290 3291 /* 3292 * Special case '-?' 3293 */ 3294 if (strcmp(cmdname, "-?") == 0) 3295 usage(B_TRUE); 3296 3297 /* 3298 * 'volinit' and 'volfini' do not appear in the usage message, 3299 * so we have to special case them here. 3300 */ 3301 if (strcmp(cmdname, "volinit") == 0) 3302 return (do_volcheck(B_TRUE)); 3303 else if (strcmp(cmdname, "volfini") == 0) 3304 return (do_volcheck(B_FALSE)); 3305 3306 /* 3307 * Run the appropriate command. 3308 */ 3309 for (i = 0; i < NCOMMAND; i++) { 3310 if (command_table[i].name == NULL) 3311 continue; 3312 3313 if (strcmp(cmdname, command_table[i].name) == 0) { 3314 current_command = &command_table[i]; 3315 ret = command_table[i].func(argc - 1, argv + 1); 3316 break; 3317 } 3318 } 3319 3320 if (i == NCOMMAND) { 3321 (void) fprintf(stderr, gettext("unrecognized " 3322 "command '%s'\n"), cmdname); 3323 usage(B_FALSE); 3324 } 3325 } 3326 3327 (void) fclose(mnttab_file); 3328 3329 libzfs_fini(g_zfs); 3330 3331 /* 3332 * The 'ZFS_ABORT' environment variable causes us to dump core on exit 3333 * for the purposes of running ::findleaks. 3334 */ 3335 if (getenv("ZFS_ABORT") != NULL) { 3336 (void) printf("dumping core by request\n"); 3337 abort(); 3338 } 3339 3340 return (ret); 3341 } 3342