cmd/zfs/zfs_main.c

   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 2009 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  */
  26
  27 #include <assert.h>
  28 #include <ctype.h>
  29 #include <errno.h>
  30 #include <libgen.h>
  31 #include <libintl.h>
  32 #include <libuutil.h>
  33 #include <libnvpair.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 <grp.h>
  43 #include <pwd.h>
  44 #include <sys/mkdev.h>
  45 #include <sys/mntent.h>
  46 #include <sys/mnttab.h>
  47 #include <sys/mount.h>
  48 #include <sys/stat.h>
  49 #include <sys/fs/zfs.h>
  50
  51 #include <libzfs.h>
  52 #include <libuutil.h>
  53
  54 #include "zfs_iter.h"
  55 #include "zfs_util.h"
  56
  57 libzfs_handle_t *g_zfs;
  58
  59 static FILE *mnttab_file;
  60 static char history_str[HIS_MAX_RECORD_LEN];
  61 const char *pypath = "/usr/lib/zfs/pyzfs.py";
  62
  63 static int zfs_do_clone(int argc, char **argv);
  64 static int zfs_do_create(int argc, char **argv);
  65 static int zfs_do_destroy(int argc, char **argv);
  66 static int zfs_do_get(int argc, char **argv);
  67 static int zfs_do_inherit(int argc, char **argv);
  68 static int zfs_do_list(int argc, char **argv);
  69 static int zfs_do_mount(int argc, char **argv);
  70 static int zfs_do_rename(int argc, char **argv);
  71 static int zfs_do_rollback(int argc, char **argv);
  72 static int zfs_do_set(int argc, char **argv);
  73 static int zfs_do_upgrade(int argc, char **argv);
  74 static int zfs_do_snapshot(int argc, char **argv);
  75 static int zfs_do_unmount(int argc, char **argv);
  76 static int zfs_do_share(int argc, char **argv);
  77 static int zfs_do_unshare(int argc, char **argv);
  78 static int zfs_do_send(int argc, char **argv);
  79 static int zfs_do_receive(int argc, char **argv);
  80 static int zfs_do_promote(int argc, char **argv);
  81 static int zfs_do_userspace(int argc, char **argv);
  82 static int zfs_do_python(int argc, char **argv);
  83 static int zfs_do_hold(int argc, char **argv);
  84 static int zfs_do_release(int argc, char **argv);
  85
  86 /*
  87  * Enable a reasonable set of defaults for libumem debugging on DEBUG builds.
  88  */
  89
  90 #ifdef DEBUG
  91 const char *
  92 _umem_debug_init(void)
  93 {
  94         return ("default,verbose"); /* $UMEM_DEBUG setting */
  95 }
  96
  97 const char *
  98 _umem_logging_init(void)
  99 {
 100         return ("fail,contents"); /* $UMEM_LOGGING setting */
 101 }
 102 #endif
 103
 104 typedef enum {
 105         HELP_CLONE,
 106         HELP_CREATE,
 107         HELP_DESTROY,
 108         HELP_GET,
 109         HELP_INHERIT,
 110         HELP_UPGRADE,
 111         HELP_LIST,
 112         HELP_MOUNT,
 113         HELP_PROMOTE,
 114         HELP_RECEIVE,
 115         HELP_RENAME,
 116         HELP_ROLLBACK,
 117         HELP_SEND,
 118         HELP_SET,
 119         HELP_SHARE,
 120         HELP_SNAPSHOT,
 121         HELP_UNMOUNT,
 122         HELP_UNSHARE,
 123         HELP_ALLOW,
 124         HELP_UNALLOW,
 125         HELP_USERSPACE,
 126         HELP_GROUPSPACE,
 127         HELP_HOLD,
 128         HELP_HOLDS,
 129         HELP_RELEASE
 130 } zfs_help_t;
 131
 132 typedef struct zfs_command {
 133         const char      *name;
 134         int             (*func)(int argc, char **argv);
 135         zfs_help_t      usage;
 136 } zfs_command_t;
 137
 138 /*
 139  * Master command table.  Each ZFS command has a name, associated function, and
 140  * usage message.  The usage messages need to be internationalized, so we have
 141  * to have a function to return the usage message based on a command index.
 142  *
 143  * These commands are organized according to how they are displayed in the usage
 144  * message.  An empty command (one with a NULL name) indicates an empty line in
 145  * the generic usage message.
 146  */
 147 static zfs_command_t command_table[] = {
 148         { "create",     zfs_do_create,          HELP_CREATE             },
 149         { "destroy",    zfs_do_destroy,         HELP_DESTROY            },
 150         { NULL },
 151         { "snapshot",   zfs_do_snapshot,        HELP_SNAPSHOT           },
 152         { "rollback",   zfs_do_rollback,        HELP_ROLLBACK           },
 153         { "clone",      zfs_do_clone,           HELP_CLONE              },
 154         { "promote",    zfs_do_promote,         HELP_PROMOTE            },
 155         { "rename",     zfs_do_rename,          HELP_RENAME             },
 156         { NULL },
 157         { "list",       zfs_do_list,            HELP_LIST               },
 158         { NULL },
 159         { "set",        zfs_do_set,             HELP_SET                },
 160         { "get",        zfs_do_get,             HELP_GET                },
 161         { "inherit",    zfs_do_inherit,         HELP_INHERIT            },
 162         { "upgrade",    zfs_do_upgrade,         HELP_UPGRADE            },
 163         { "userspace",  zfs_do_userspace,       HELP_USERSPACE          },
 164         { "groupspace", zfs_do_userspace,       HELP_GROUPSPACE         },
 165         { NULL },
 166         { "mount",      zfs_do_mount,           HELP_MOUNT              },
 167         { "unmount",    zfs_do_unmount,         HELP_UNMOUNT            },
 168         { "share",      zfs_do_share,           HELP_SHARE              },
 169         { "unshare",    zfs_do_unshare,         HELP_UNSHARE            },
 170         { NULL },
 171         { "send",       zfs_do_send,            HELP_SEND               },
 172         { "receive",    zfs_do_receive,         HELP_RECEIVE            },
 173         { NULL },
 174         { "allow",      zfs_do_python,          HELP_ALLOW              },
 175         { NULL },
 176         { "unallow",    zfs_do_python,          HELP_UNALLOW            },
 177         { NULL },
 178         { "hold",       zfs_do_hold,            HELP_HOLD               },
 179         { "holds",      zfs_do_python,          HELP_HOLDS              },
 180         { "release",    zfs_do_release,         HELP_RELEASE            },
 181 };
 182
 183 #define NCOMMAND        (sizeof (command_table) / sizeof (command_table[0]))
 184
 185 zfs_command_t *current_command;
 186
 187 static const char *
 188 get_usage(zfs_help_t idx)
 189 {
 190         switch (idx) {
 191         case HELP_CLONE:
 192                 return (gettext("\tclone [-p] [-o property=value] ... "
 193                     "<snapshot> <filesystem|volume>\n"));
 194         case HELP_CREATE:
 195                 return (gettext("\tcreate [-p] [-o property=value] ... "
 196                     "<filesystem>\n"
 197                     "\tcreate [-ps] [-b blocksize] [-o property=value] ... "
 198                     "-V <size> <volume>\n"));
 199         case HELP_DESTROY:
 200                 return (gettext("\tdestroy [-rRf] "
 201                     "<filesystem|volume|snapshot>\n"
 202                     "\tdestroy -d [-r] <filesystem|volume|snapshot>\n"));
 203         case HELP_GET:
 204                 return (gettext("\tget [-rHp] [-d max] "
 205                     "[-o field[,...]] [-s source[,...]]\n"
 206                     "\t    <\"all\" | property[,...]> "
 207                     "[filesystem|volume|snapshot] ...\n"));
 208         case HELP_INHERIT:
 209                 return (gettext("\tinherit [-r] <property> "
 210                     "<filesystem|volume|snapshot> ...\n"));
 211         case HELP_UPGRADE:
 212                 return (gettext("\tupgrade [-v]\n"
 213                     "\tupgrade [-r] [-V version] <-a | filesystem ...>\n"));
 214         case HELP_LIST:
 215                 return (gettext("\tlist [-rH][-d max] "
 216                     "[-o property[,...]] [-t type[,...]] [-s property] ...\n"
 217                     "\t    [-S property] ... "
 218                     "[filesystem|volume|snapshot] ...\n"));
 219         case HELP_MOUNT:
 220                 return (gettext("\tmount\n"
 221                     "\tmount [-vO] [-o opts] <-a | filesystem>\n"));
 222         case HELP_PROMOTE:
 223                 return (gettext("\tpromote <clone-filesystem>\n"));
 224         case HELP_RECEIVE:
 225                 return (gettext("\treceive [-vnF] <filesystem|volume|"
 226                 "snapshot>\n"
 227                 "\treceive [-vnF] -d <filesystem>\n"));
 228         case HELP_RENAME:
 229                 return (gettext("\trename <filesystem|volume|snapshot> "
 230                     "<filesystem|volume|snapshot>\n"
 231                     "\trename -p <filesystem|volume> <filesystem|volume>\n"
 232                     "\trename -r <snapshot> <snapshot>"));
 233         case HELP_ROLLBACK:
 234                 return (gettext("\trollback [-rRf] <snapshot>\n"));
 235         case HELP_SEND:
 236                 return (gettext("\tsend [-R] [-[iI] snapshot] <snapshot>\n"));
 237         case HELP_SET:
 238                 return (gettext("\tset <property=value> "
 239                     "<filesystem|volume|snapshot> ...\n"));
 240         case HELP_SHARE:
 241                 return (gettext("\tshare <-a | filesystem>\n"));
 242         case HELP_SNAPSHOT:
 243                 return (gettext("\tsnapshot [-r] [-o property=value] ... "
 244                     "<filesystem@snapname|volume@snapname>\n"));
 245         case HELP_UNMOUNT:
 246                 return (gettext("\tunmount [-f] "
 247                     "<-a | filesystem|mountpoint>\n"));
 248         case HELP_UNSHARE:
 249                 return (gettext("\tunshare "
 250                     "<-a | filesystem|mountpoint>\n"));
 251         case HELP_ALLOW:
 252                 return (gettext("\tallow <filesystem|volume>\n"
 253                     "\tallow [-ldug] "
 254                     "<\"everyone\"|user|group>[,...] <perm|@setname>[,...]\n"
 255                     "\t    <filesystem|volume>\n"
 256                     "\tallow [-ld] -e <perm|@setname>[,...] "
 257                     "<filesystem|volume>\n"
 258                     "\tallow -c <perm|@setname>[,...] <filesystem|volume>\n"
 259                     "\tallow -s @setname <perm|@setname>[,...] "
 260                     "<filesystem|volume>\n"));
 261         case HELP_UNALLOW:
 262                 return (gettext("\tunallow [-rldug] "
 263                     "<\"everyone\"|user|group>[,...]\n"
 264                     "\t    [<perm|@setname>[,...]] <filesystem|volume>\n"
 265                     "\tunallow [-rld] -e [<perm|@setname>[,...]] "
 266                     "<filesystem|volume>\n"
 267                     "\tunallow [-r] -c [<perm|@setname>[,...]] "
 268                     "<filesystem|volume>\n"
 269                     "\tunallow [-r] -s @setname [<perm|@setname>[,...]] "
 270                     "<filesystem|volume>\n"));
 271         case HELP_USERSPACE:
 272                 return (gettext("\tuserspace [-hniHp] [-o field[,...]] "
 273                     "[-sS field] ... [-t type[,...]]\n"
 274                     "\t    <filesystem|snapshot>\n"));
 275         case HELP_GROUPSPACE:
 276                 return (gettext("\tgroupspace [-hniHpU] [-o field[,...]] "
 277                     "[-sS field] ... [-t type[,...]]\n"
 278                     "\t    <filesystem|snapshot>\n"));
 279         case HELP_HOLD:
 280                 return (gettext("\thold [-r] <tag> <snapshot> ...\n"));
 281         case HELP_HOLDS:
 282                 return (gettext("\tholds [-r] <snapshot> ...\n"));
 283         case HELP_RELEASE:
 284                 return (gettext("\trelease [-r] <tag> <snapshot> ...\n"));
 285         }
 286
 287         abort();
 288         /* NOTREACHED */
 289 }
 290
 291 /*
 292  * Utility function to guarantee malloc() success.
 293  */
 294 void *
 295 safe_malloc(size_t size)
 296 {
 297         void *data;
 298
 299         if ((data = calloc(1, size)) == NULL) {
 300                 (void) fprintf(stderr, "internal error: out of memory\n");
 301                 exit(1);
 302         }
 303
 304         return (data);
 305 }
 306
 307 /*
 308  * Callback routine that will print out information for each of
 309  * the properties.
 310  */
 311 static int
 312 usage_prop_cb(int prop, void *cb)
 313 {
 314         FILE *fp = cb;
 315
 316         (void) fprintf(fp, "\t%-15s ", zfs_prop_to_name(prop));
 317
 318         if (zfs_prop_readonly(prop))
 319                 (void) fprintf(fp, " NO    ");
 320         else
 321                 (void) fprintf(fp, "YES    ");
 322
 323         if (zfs_prop_inheritable(prop))
 324                 (void) fprintf(fp, "  YES   ");
 325         else
 326                 (void) fprintf(fp, "   NO   ");
 327
 328         if (zfs_prop_values(prop) == NULL)
 329                 (void) fprintf(fp, "-\n");
 330         else
 331                 (void) fprintf(fp, "%s\n", zfs_prop_values(prop));
 332
 333         return (ZPROP_CONT);
 334 }
 335
 336 /*
 337  * Display usage message.  If we're inside a command, display only the usage for
 338  * that command.  Otherwise, iterate over the entire command table and display
 339  * a complete usage message.
 340  */
 341 static void
 342 usage(boolean_t requested)
 343 {
 344         int i;
 345         boolean_t show_properties = B_FALSE;
 346         FILE *fp = requested ? stdout : stderr;
 347
 348         if (current_command == NULL) {
 349
 350                 (void) fprintf(fp, gettext("usage: zfs command args ...\n"));
 351                 (void) fprintf(fp,
 352                     gettext("where 'command' is one of the following:\n\n"));
 353
 354                 for (i = 0; i < NCOMMAND; i++) {
 355                         if (command_table[i].name == NULL)
 356                                 (void) fprintf(fp, "\n");
 357                         else
 358                                 (void) fprintf(fp, "%s",
 359                                     get_usage(command_table[i].usage));
 360                 }
 361
 362                 (void) fprintf(fp, gettext("\nEach dataset is of the form: "
 363                     "pool/[dataset/]*dataset[@name]\n"));
 364         } else {
 365                 (void) fprintf(fp, gettext("usage:\n"));
 366                 (void) fprintf(fp, "%s", get_usage(current_command->usage));
 367         }
 368
 369         if (current_command != NULL &&
 370             (strcmp(current_command->name, "set") == 0 ||
 371             strcmp(current_command->name, "get") == 0 ||
 372             strcmp(current_command->name, "inherit") == 0 ||
 373             strcmp(current_command->name, "list") == 0))
 374                 show_properties = B_TRUE;
 375
 376         if (show_properties) {
 377                 (void) fprintf(fp,
 378                     gettext("\nThe following properties are supported:\n"));
 379
 380                 (void) fprintf(fp, "\n\t%-14s %s  %s   %s\n\n",
 381                     "PROPERTY", "EDIT", "INHERIT", "VALUES");
 382
 383                 /* Iterate over all properties */
 384                 (void) zprop_iter(usage_prop_cb, fp, B_FALSE, B_TRUE,
 385                     ZFS_TYPE_DATASET);
 386
 387                 (void) fprintf(fp, "\t%-15s ", "userused@...");
 388                 (void) fprintf(fp, " NO       NO   <size>\n");
 389                 (void) fprintf(fp, "\t%-15s ", "groupused@...");
 390                 (void) fprintf(fp, " NO       NO   <size>\n");
 391                 (void) fprintf(fp, "\t%-15s ", "userquota@...");
 392                 (void) fprintf(fp, "YES       NO   <size> | none\n");
 393                 (void) fprintf(fp, "\t%-15s ", "groupquota@...");
 394                 (void) fprintf(fp, "YES       NO   <size> | none\n");
 395
 396                 (void) fprintf(fp, gettext("\nSizes are specified in bytes "
 397                     "with standard units such as K, M, G, etc.\n"));
 398                 (void) fprintf(fp, gettext("\nUser-defined properties can "
 399                     "be specified by using a name containing a colon (:).\n"));
 400                 (void) fprintf(fp, gettext("\nThe {user|group}{used|quota}@ "
 401                     "properties must be appended with\n"
 402                     "a user or group specifier of one of these forms:\n"
 403                     "    POSIX name      (eg: \"matt\")\n"
 404                     "    POSIX id        (eg: \"126829\")\n"
 405                     "    SMB name@domain (eg: \"matt@sun\")\n"
 406                     "    SMB SID         (eg: \"S-1-234-567-89\")\n"));
 407         } else {
 408                 (void) fprintf(fp,
 409                     gettext("\nFor the property list, run: %s\n"),
 410                     "zfs set|get");
 411                 (void) fprintf(fp,
 412                     gettext("\nFor the delegated permission list, run: %s\n"),
 413                     "zfs allow|unallow");
 414         }
 415
 416         /*
 417          * See comments at end of main().
 418          */
 419         if (getenv("ZFS_ABORT") != NULL) {
 420                 (void) printf("dumping core by request\n");
 421                 abort();
 422         }
 423
 424         exit(requested ? 0 : 2);
 425 }
 426
 427 static int
 428 parseprop(nvlist_t *props)
 429 {
 430         char *propname = optarg;
 431         char *propval, *strval;
 432
 433         if ((propval = strchr(propname, '=')) == NULL) {
 434                 (void) fprintf(stderr, gettext("missing "
 435                     "'=' for -o option\n"));
 436                 return (-1);
 437         }
 438         *propval = '\0';
 439         propval++;
 440         if (nvlist_lookup_string(props, propname, &strval) == 0) {
 441                 (void) fprintf(stderr, gettext("property '%s' "
 442                     "specified multiple times\n"), propname);
 443                 return (-1);
 444         }
 445         if (nvlist_add_string(props, propname, propval) != 0) {
 446                 (void) fprintf(stderr, gettext("internal "
 447                     "error: out of memory\n"));
 448                 return (-1);
 449         }
 450         return (0);
 451 }
 452
 453 static int
 454 parse_depth(char *opt, int *flags)
 455 {
 456         char *tmp;
 457         int depth;
 458
 459         depth = (int)strtol(opt, &tmp, 0);
 460         if (*tmp) {
 461                 (void) fprintf(stderr,
 462                     gettext("%s is not an integer\n"), optarg);
 463                 usage(B_FALSE);
 464         }
 465         if (depth < 0) {
 466                 (void) fprintf(stderr,
 467                     gettext("Depth can not be negative.\n"));
 468                 usage(B_FALSE);
 469         }
 470         *flags |= (ZFS_ITER_DEPTH_LIMIT|ZFS_ITER_RECURSE);
 471         return (depth);
 472 }
 473
 474 /*
 475  * zfs clone [-p] [-o prop=value] ... <snap> <fs | vol>
 476  *
 477  * Given an existing dataset, create a writable copy whose initial contents
 478  * are the same as the source.  The newly created dataset maintains a
 479  * dependency on the original; the original cannot be destroyed so long as
 480  * the clone exists.
 481  *
 482  * The '-p' flag creates all the non-existing ancestors of the target first.
 483  */
 484 static int
 485 zfs_do_clone(int argc, char **argv)
 486 {
 487         zfs_handle_t *zhp = NULL;
 488         boolean_t parents = B_FALSE;
 489         nvlist_t *props;
 490         int ret;
 491         int c;
 492
 493         if (nvlist_alloc(&props, NV_UNIQUE_NAME, 0) != 0) {
 494                 (void) fprintf(stderr, gettext("internal error: "
 495                     "out of memory\n"));
 496                 return (1);
 497         }
 498
 499         /* check options */
 500         while ((c = getopt(argc, argv, "o:p")) != -1) {
 501                 switch (c) {
 502                 case 'o':
 503                         if (parseprop(props))
 504                                 return (1);
 505                         break;
 506                 case 'p':
 507                         parents = B_TRUE;
 508                         break;
 509                 case '?':
 510                         (void) fprintf(stderr, gettext("invalid option '%c'\n"),
 511                             optopt);
 512                         goto usage;
 513                 }
 514         }
 515
 516         argc -= optind;
 517         argv += optind;
 518
 519         /* check number of arguments */
 520         if (argc < 1) {
 521                 (void) fprintf(stderr, gettext("missing source dataset "
 522                     "argument\n"));
 523                 goto usage;
 524         }
 525         if (argc < 2) {
 526                 (void) fprintf(stderr, gettext("missing target dataset "
 527                     "argument\n"));
 528                 goto usage;
 529         }
 530         if (argc > 2) {
 531                 (void) fprintf(stderr, gettext("too many arguments\n"));
 532                 goto usage;
 533         }
 534
 535         /* open the source dataset */
 536         if ((zhp = zfs_open(g_zfs, argv[0], ZFS_TYPE_SNAPSHOT)) == NULL)
 537                 return (1);
 538
 539         if (parents && zfs_name_valid(argv[1], ZFS_TYPE_FILESYSTEM |
 540             ZFS_TYPE_VOLUME)) {
 541                 /*
 542                  * Now create the ancestors of the target dataset.  If the
 543                  * target already exists and '-p' option was used we should not
 544                  * complain.
 545                  */
 546                 if (zfs_dataset_exists(g_zfs, argv[1], ZFS_TYPE_FILESYSTEM |
 547                     ZFS_TYPE_VOLUME))
 548                         return (0);
 549                 if (zfs_create_ancestors(g_zfs, argv[1]) != 0)
 550                         return (1);
 551         }
 552
 553         /* pass to libzfs */
 554         ret = zfs_clone(zhp, argv[1], props);
 555
 556         /* create the mountpoint if necessary */
 557         if (ret == 0) {
 558                 zfs_handle_t *clone;
 559
 560                 clone = zfs_open(g_zfs, argv[1], ZFS_TYPE_DATASET);
 561                 if (clone != NULL) {
 562                         if ((ret = zfs_mount(clone, NULL, 0)) == 0)
 563                                 ret = zfs_share(clone);
 564                         zfs_close(clone);
 565                 }
 566         }
 567
 568         zfs_close(zhp);
 569         nvlist_free(props);
 570
 571         return (!!ret);
 572
 573 usage:
 574         if (zhp)
 575                 zfs_close(zhp);
 576         nvlist_free(props);
 577         usage(B_FALSE);
 578         return (-1);
 579 }
 580
 581 /*
 582  * zfs create [-p] [-o prop=value] ... fs
 583  * zfs create [-ps] [-b blocksize] [-o prop=value] ... -V vol size
 584  *
 585  * Create a new dataset.  This command can be used to create filesystems
 586  * and volumes.  Snapshot creation is handled by 'zfs snapshot'.
 587  * For volumes, the user must specify a size to be used.
 588  *
 589  * The '-s' flag applies only to volumes, and indicates that we should not try
 590  * to set the reservation for this volume.  By default we set a reservation
 591  * equal to the size for any volume.  For pools with SPA_VERSION >=
 592  * SPA_VERSION_REFRESERVATION, we set a refreservation instead.
 593  *
 594  * The '-p' flag creates all the non-existing ancestors of the target first.
 595  */
 596 static int
 597 zfs_do_create(int argc, char **argv)
 598 {
 599         zfs_type_t type = ZFS_TYPE_FILESYSTEM;
 600         zfs_handle_t *zhp = NULL;
 601         uint64_t volsize;
 602         int c;
 603         boolean_t noreserve = B_FALSE;
 604         boolean_t bflag = B_FALSE;
 605         boolean_t parents = B_FALSE;
 606         int ret = 1;
 607         nvlist_t *props;
 608         uint64_t intval;
 609         int canmount;
 610
 611         if (nvlist_alloc(&props, NV_UNIQUE_NAME, 0) != 0) {
 612                 (void) fprintf(stderr, gettext("internal error: "
 613                     "out of memory\n"));
 614                 return (1);
 615         }
 616
 617         /* check options */
 618         while ((c = getopt(argc, argv, ":V:b:so:p")) != -1) {
 619                 switch (c) {
 620                 case 'V':
 621                         type = ZFS_TYPE_VOLUME;
 622                         if (zfs_nicestrtonum(g_zfs, optarg, &intval) != 0) {
 623                                 (void) fprintf(stderr, gettext("bad volume "
 624                                     "size '%s': %s\n"), optarg,
 625                                     libzfs_error_description(g_zfs));
 626                                 goto error;
 627                         }
 628
 629                         if (nvlist_add_uint64(props,
 630                             zfs_prop_to_name(ZFS_PROP_VOLSIZE),
 631                             intval) != 0) {
 632                                 (void) fprintf(stderr, gettext("internal "
 633                                     "error: out of memory\n"));
 634                                 goto error;
 635                         }
 636                         volsize = intval;
 637                         break;
 638                 case 'p':
 639                         parents = B_TRUE;
 640                         break;
 641                 case 'b':
 642                         bflag = B_TRUE;
 643                         if (zfs_nicestrtonum(g_zfs, optarg, &intval) != 0) {
 644                                 (void) fprintf(stderr, gettext("bad volume "
 645                                     "block size '%s': %s\n"), optarg,
 646                                     libzfs_error_description(g_zfs));
 647                                 goto error;
 648                         }
 649
 650                         if (nvlist_add_uint64(props,
 651                             zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE),
 652                             intval) != 0) {
 653                                 (void) fprintf(stderr, gettext("internal "
 654                                     "error: out of memory\n"));
 655                                 goto error;
 656                         }
 657                         break;
 658                 case 'o':
 659                         if (parseprop(props))
 660                                 goto error;
 661                         break;
 662                 case 's':
 663                         noreserve = B_TRUE;
 664                         break;
 665                 case ':':
 666                         (void) fprintf(stderr, gettext("missing size "
 667                             "argument\n"));
 668                         goto badusage;
 669                         break;
 670                 case '?':
 671                         (void) fprintf(stderr, gettext("invalid option '%c'\n"),
 672                             optopt);
 673                         goto badusage;
 674                 }
 675         }
 676
 677         if ((bflag || noreserve) && type != ZFS_TYPE_VOLUME) {
 678                 (void) fprintf(stderr, gettext("'-s' and '-b' can only be "
 679                     "used when creating a volume\n"));
 680                 goto badusage;
 681         }
 682
 683         argc -= optind;
 684         argv += optind;
 685
 686         /* check number of arguments */
 687         if (argc == 0) {
 688                 (void) fprintf(stderr, gettext("missing %s argument\n"),
 689                     zfs_type_to_name(type));
 690                 goto badusage;
 691         }
 692         if (argc > 1) {
 693                 (void) fprintf(stderr, gettext("too many arguments\n"));
 694                 goto badusage;
 695         }
 696
 697         if (type == ZFS_TYPE_VOLUME && !noreserve) {
 698                 zpool_handle_t *zpool_handle;
 699                 uint64_t spa_version;
 700                 char *p;
 701                 zfs_prop_t resv_prop;
 702                 char *strval;
 703
 704                 if (p = strchr(argv[0], '/'))
 705                         *p = '\0';
 706                 zpool_handle = zpool_open(g_zfs, argv[0]);
 707                 if (p != NULL)
 708                         *p = '/';
 709                 if (zpool_handle == NULL)
 710                         goto error;
 711                 spa_version = zpool_get_prop_int(zpool_handle,
 712                     ZPOOL_PROP_VERSION, NULL);
 713                 zpool_close(zpool_handle);
 714                 if (spa_version >= SPA_VERSION_REFRESERVATION)
 715                         resv_prop = ZFS_PROP_REFRESERVATION;
 716                 else
 717                         resv_prop = ZFS_PROP_RESERVATION;
 718
 719                 if (nvlist_lookup_string(props, zfs_prop_to_name(resv_prop),
 720                     &strval) != 0) {
 721                         if (nvlist_add_uint64(props,
 722                             zfs_prop_to_name(resv_prop), volsize) != 0) {
 723                                 (void) fprintf(stderr, gettext("internal "
 724                                     "error: out of memory\n"));
 725                                 nvlist_free(props);
 726                                 return (1);
 727                         }
 728                 }
 729         }
 730
 731         if (parents && zfs_name_valid(argv[0], type)) {
 732                 /*
 733                  * Now create the ancestors of target dataset.  If the target
 734                  * already exists and '-p' option was used we should not
 735                  * complain.
 736                  */
 737                 if (zfs_dataset_exists(g_zfs, argv[0], type)) {
 738                         ret = 0;
 739                         goto error;
 740                 }
 741                 if (zfs_create_ancestors(g_zfs, argv[0]) != 0)
 742                         goto error;
 743         }
 744
 745         /* pass to libzfs */
 746         if (zfs_create(g_zfs, argv[0], type, props) != 0)
 747                 goto error;
 748
 749         if ((zhp = zfs_open(g_zfs, argv[0], ZFS_TYPE_DATASET)) == NULL)
 750                 goto error;
 751         /*
 752          * if the user doesn't want the dataset automatically mounted,
 753          * then skip the mount/share step
 754          */
 755
 756         canmount = zfs_prop_get_int(zhp, ZFS_PROP_CANMOUNT);
 757
 758         /*
 759          * Mount and/or share the new filesystem as appropriate.  We provide a
 760          * verbose error message to let the user know that their filesystem was
 761          * in fact created, even if we failed to mount or share it.
 762          */
 763         ret = 0;
 764         if (canmount == ZFS_CANMOUNT_ON) {
 765                 if (zfs_mount(zhp, NULL, 0) != 0) {
 766                         (void) fprintf(stderr, gettext("filesystem "
 767                             "successfully created, but not mounted\n"));
 768                         ret = 1;
 769                 } else if (zfs_share(zhp) != 0) {
 770                         (void) fprintf(stderr, gettext("filesystem "
 771                             "successfully created, but not shared\n"));
 772                         ret = 1;
 773                 }
 774         }
 775
 776 error:
 777         if (zhp)
 778                 zfs_close(zhp);
 779         nvlist_free(props);
 780         return (ret);
 781 badusage:
 782         nvlist_free(props);
 783         usage(B_FALSE);
 784         return (2);
 785 }
 786
 787 /*
 788  * zfs destroy [-rRf] <fs, snap, vol>
 789  * zfs destroy -d [-r] <fs, snap, vol>
 790  *
 791  *      -r      Recursively destroy all children
 792  *      -R      Recursively destroy all dependents, including clones
 793  *      -f      Force unmounting of any dependents
 794  *      -d      If we can't destroy now, mark for deferred destruction
 795  *
 796  * Destroys the given dataset.  By default, it will unmount any filesystems,
 797  * and refuse to destroy a dataset that has any dependents.  A dependent can
 798  * either be a child, or a clone of a child.
 799  */
 800 typedef struct destroy_cbdata {
 801         boolean_t       cb_first;
 802         int             cb_force;
 803         int             cb_recurse;
 804         int             cb_error;
 805         int             cb_needforce;
 806         int             cb_doclones;
 807         boolean_t       cb_closezhp;
 808         zfs_handle_t    *cb_target;
 809         char            *cb_snapname;
 810         boolean_t       cb_defer_destroy;
 811 } destroy_cbdata_t;
 812
 813 /*
 814  * Check for any dependents based on the '-r' or '-R' flags.
 815  */
 816 static int
 817 destroy_check_dependent(zfs_handle_t *zhp, void *data)
 818 {
 819         destroy_cbdata_t *cbp = data;
 820         const char *tname = zfs_get_name(cbp->cb_target);
 821         const char *name = zfs_get_name(zhp);
 822
 823         if (strncmp(tname, name, strlen(tname)) == 0 &&
 824             (name[strlen(tname)] == '/' || name[strlen(tname)] == '@')) {
 825                 /*
 826                  * This is a direct descendant, not a clone somewhere else in
 827                  * the hierarchy.
 828                  */
 829                 if (cbp->cb_recurse)
 830                         goto out;
 831
 832                 if (cbp->cb_first) {
 833                         (void) fprintf(stderr, gettext("cannot destroy '%s': "
 834                             "%s has children\n"),
 835                             zfs_get_name(cbp->cb_target),
 836                             zfs_type_to_name(zfs_get_type(cbp->cb_target)));
 837                         (void) fprintf(stderr, gettext("use '-r' to destroy "
 838                             "the following datasets:\n"));
 839                         cbp->cb_first = B_FALSE;
 840                         cbp->cb_error = 1;
 841                 }
 842
 843                 (void) fprintf(stderr, "%s\n", zfs_get_name(zhp));
 844         } else {
 845                 /*
 846                  * This is a clone.  We only want to report this if the '-r'
 847                  * wasn't specified, or the target is a snapshot.
 848                  */
 849                 if (!cbp->cb_recurse &&
 850                     zfs_get_type(cbp->cb_target) != ZFS_TYPE_SNAPSHOT)
 851                         goto out;
 852
 853                 if (cbp->cb_first) {
 854                         (void) fprintf(stderr, gettext("cannot destroy '%s': "
 855                             "%s has dependent clones\n"),
 856                             zfs_get_name(cbp->cb_target),
 857                             zfs_type_to_name(zfs_get_type(cbp->cb_target)));
 858                         (void) fprintf(stderr, gettext("use '-R' to destroy "
 859                             "the following datasets:\n"));
 860                         cbp->cb_first = B_FALSE;
 861                         cbp->cb_error = 1;
 862                 }
 863
 864                 (void) fprintf(stderr, "%s\n", zfs_get_name(zhp));
 865         }
 866
 867 out:
 868         zfs_close(zhp);
 869         return (0);
 870 }
 871
 872 static int
 873 destroy_callback(zfs_handle_t *zhp, void *data)
 874 {
 875         destroy_cbdata_t *cbp = data;
 876
 877         /*
 878          * Ignore pools (which we've already flagged as an error before getting
 879          * here.
 880          */
 881         if (strchr(zfs_get_name(zhp), '/') == NULL &&
 882             zfs_get_type(zhp) == ZFS_TYPE_FILESYSTEM) {
 883                 zfs_close(zhp);
 884                 return (0);
 885         }
 886
 887         /*
 888          * Bail out on the first error.
 889          */
 890         if (zfs_unmount(zhp, NULL, cbp->cb_force ? MS_FORCE : 0) != 0 ||
 891             zfs_destroy(zhp, cbp->cb_defer_destroy) != 0) {
 892                 zfs_close(zhp);
 893                 return (-1);
 894         }
 895
 896         zfs_close(zhp);
 897         return (0);
 898 }
 899
 900 static int
 901 destroy_snap_clones(zfs_handle_t *zhp, void *arg)
 902 {
 903         destroy_cbdata_t *cbp = arg;
 904         char thissnap[MAXPATHLEN];
 905         zfs_handle_t *szhp;
 906         boolean_t closezhp = cbp->cb_closezhp;
 907         int rv;
 908
 909         (void) snprintf(thissnap, sizeof (thissnap),
 910             "%s@%s", zfs_get_name(zhp), cbp->cb_snapname);
 911
 912         libzfs_print_on_error(g_zfs, B_FALSE);
 913         szhp = zfs_open(g_zfs, thissnap, ZFS_TYPE_SNAPSHOT);
 914         libzfs_print_on_error(g_zfs, B_TRUE);
 915         if (szhp) {
 916                 /*
 917                  * Destroy any clones of this snapshot
 918                  */
 919                 if (zfs_iter_dependents(szhp, B_FALSE, destroy_callback,
 920                     cbp) != 0) {
 921                         zfs_close(szhp);
 922                         if (closezhp)
 923                                 zfs_close(zhp);
 924                         return (-1);
 925                 }
 926                 zfs_close(szhp);
 927         }
 928
 929         cbp->cb_closezhp = B_TRUE;
 930         rv = zfs_iter_filesystems(zhp, destroy_snap_clones, arg);
 931         if (closezhp)
 932                 zfs_close(zhp);
 933         return (rv);
 934 }
 935
 936 static int
 937 zfs_do_destroy(int argc, char **argv)
 938 {
 939         destroy_cbdata_t cb = { 0 };
 940         int c;
 941         zfs_handle_t *zhp;
 942         char *cp;
 943
 944         /* check options */
 945         while ((c = getopt(argc, argv, "dfrR")) != -1) {
 946                 switch (c) {
 947                 case 'd':
 948                         cb.cb_defer_destroy = B_TRUE;
 949                         break;
 950                 case 'f':
 951                         cb.cb_force = 1;
 952                         break;
 953                 case 'r':
 954                         cb.cb_recurse = 1;
 955                         break;
 956                 case 'R':
 957                         cb.cb_recurse = 1;
 958                         cb.cb_doclones = 1;
 959                         break;
 960                 case '?':
 961                 default:
 962                         (void) fprintf(stderr, gettext("invalid option '%c'\n"),
 963                             optopt);
 964                         usage(B_FALSE);
 965                 }
 966         }
 967
 968         argc -= optind;
 969         argv += optind;
 970
 971         /* check number of arguments */
 972         if (argc == 0) {
 973                 (void) fprintf(stderr, gettext("missing path argument\n"));
 974                 usage(B_FALSE);
 975         }
 976         if (argc > 1) {
 977                 (void) fprintf(stderr, gettext("too many arguments\n"));
 978                 usage(B_FALSE);
 979         }
 980
 981         if (cb.cb_defer_destroy && cb.cb_doclones)
 982                 usage(B_FALSE);
 983
 984         /*
 985          * If we are doing recursive destroy of a snapshot, then the
 986          * named snapshot may not exist.  Go straight to libzfs.
 987          */
 988         if (cb.cb_recurse && (cp = strchr(argv[0], '@'))) {
 989                 int ret;
 990
 991                 *cp = '\0';
 992                 if ((zhp = zfs_open(g_zfs, argv[0], ZFS_TYPE_DATASET)) == NULL)
 993                         return (1);
 994                 *cp = '@';
 995                 cp++;
 996
 997                 if (cb.cb_doclones) {
 998                         cb.cb_snapname = cp;
 999                         if (destroy_snap_clones(zhp, &cb) != 0) {
1000                                 zfs_close(zhp);
1001                                 return (1);
1002                         }
1003                 }
1004
1005                 ret = zfs_destroy_snaps(zhp, cp, cb.cb_defer_destroy);
1006                 zfs_close(zhp);
1007                 if (ret) {
1008                         (void) fprintf(stderr,
1009                             gettext("no snapshots destroyed\n"));
1010                 }
1011                 return (ret != 0);
1012         }
1013
1014         /* Open the given dataset */
1015         if ((zhp = zfs_open(g_zfs, argv[0], ZFS_TYPE_DATASET)) == NULL)
1016                 return (1);
1017
1018         cb.cb_target = zhp;
1019
1020         /*
1021          * Perform an explicit check for pools before going any further.
1022          */
1023         if (!cb.cb_recurse && strchr(zfs_get_name(zhp), '/') == NULL &&
1024             zfs_get_type(zhp) == ZFS_TYPE_FILESYSTEM) {
1025                 (void) fprintf(stderr, gettext("cannot destroy '%s': "
1026                     "operation does not apply to pools\n"),
1027                     zfs_get_name(zhp));
1028                 (void) fprintf(stderr, gettext("use 'zfs destroy -r "
1029                     "%s' to destroy all datasets in the pool\n"),
1030                     zfs_get_name(zhp));
1031                 (void) fprintf(stderr, gettext("use 'zpool destroy %s' "
1032                     "to destroy the pool itself\n"), zfs_get_name(zhp));
1033                 zfs_close(zhp);
1034                 return (1);
1035         }
1036
1037         /*
1038          * Check for any dependents and/or clones.
1039          */
1040         cb.cb_first = B_TRUE;
1041         if (!cb.cb_doclones && !cb.cb_defer_destroy &&
1042             zfs_iter_dependents(zhp, B_TRUE, destroy_check_dependent,
1043             &cb) != 0) {
1044                 zfs_close(zhp);
1045                 return (1);
1046         }
1047
1048         if (cb.cb_error || (!cb.cb_defer_destroy &&
1049             (zfs_iter_dependents(zhp, B_FALSE, destroy_callback, &cb) != 0))) {
1050                 zfs_close(zhp);
1051                 return (1);
1052         }
1053
1054         /*
1055          * Do the real thing.  The callback will close the handle regardless of
1056          * whether it succeeds or not.
1057          */
1058
1059         if (destroy_callback(zhp, &cb) != 0)
1060                 return (1);
1061
1062         return (0);
1063 }
1064
1065 /*
1066  * zfs get [-rHp] [-o field[,field]...] [-s source[,source]...]
1067  *      < all | property[,property]... > < fs | snap | vol > ...
1068  *
1069  *      -r      recurse over any child datasets
1070  *      -H      scripted mode.  Headers are stripped, and fields are separated
1071  *              by tabs instead of spaces.
1072  *      -o      Set of fields to display.  One of "name,property,value,source".
1073  *              Default is all four.
1074  *      -s      Set of sources to allow.  One of
1075  *              "local,default,inherited,temporary,none".  Default is all
1076  *              five.
1077  *      -p      Display values in parsable (literal) format.
1078  *
1079  *  Prints properties for the given datasets.  The user can control which
1080  *  columns to display as well as which property types to allow.
1081  */
1082
1083 /*
1084  * Invoked to display the properties for a single dataset.
1085  */
1086 static int
1087 get_callback(zfs_handle_t *zhp, void *data)
1088 {
1089         char buf[ZFS_MAXPROPLEN];
1090         zprop_source_t sourcetype;
1091         char source[ZFS_MAXNAMELEN];
1092         zprop_get_cbdata_t *cbp = data;
1093         nvlist_t *userprop = zfs_get_user_props(zhp);
1094         zprop_list_t *pl = cbp->cb_proplist;
1095         nvlist_t *propval;
1096         char *strval;
1097         char *sourceval;
1098
1099         for (; pl != NULL; pl = pl->pl_next) {
1100                 /*
1101                  * Skip the special fake placeholder.  This will also skip over
1102                  * the name property when 'all' is specified.
1103                  */
1104                 if (pl->pl_prop == ZFS_PROP_NAME &&
1105                     pl == cbp->cb_proplist)
1106                         continue;
1107
1108                 if (pl->pl_prop != ZPROP_INVAL) {
1109                         if (zfs_prop_get(zhp, pl->pl_prop, buf,
1110                             sizeof (buf), &sourcetype, source,
1111                             sizeof (source),
1112                             cbp->cb_literal) != 0) {
1113                                 if (pl->pl_all)
1114                                         continue;
1115                                 if (!zfs_prop_valid_for_type(pl->pl_prop,
1116                                     ZFS_TYPE_DATASET)) {
1117                                         (void) fprintf(stderr,
1118                                             gettext("No such property '%s'\n"),
1119                                             zfs_prop_to_name(pl->pl_prop));
1120                                         continue;
1121                                 }
1122                                 sourcetype = ZPROP_SRC_NONE;
1123                                 (void) strlcpy(buf, "-", sizeof (buf));
1124                         }
1125
1126                         zprop_print_one_property(zfs_get_name(zhp), cbp,
1127                             zfs_prop_to_name(pl->pl_prop),
1128                             buf, sourcetype, source);
1129                 } else if (zfs_prop_userquota(pl->pl_user_prop)) {
1130                         sourcetype = ZPROP_SRC_LOCAL;
1131
1132                         if (zfs_prop_get_userquota(zhp, pl->pl_user_prop,
1133                             buf, sizeof (buf), cbp->cb_literal) != 0) {
1134                                 sourcetype = ZPROP_SRC_NONE;
1135                                 (void) strlcpy(buf, "-", sizeof (buf));
1136                         }
1137
1138                         zprop_print_one_property(zfs_get_name(zhp), cbp,
1139                             pl->pl_user_prop, buf, sourcetype, source);
1140                 } else {
1141                         if (nvlist_lookup_nvlist(userprop,
1142                             pl->pl_user_prop, &propval) != 0) {
1143                                 if (pl->pl_all)
1144                                         continue;
1145                                 sourcetype = ZPROP_SRC_NONE;
1146                                 strval = "-";
1147                         } else {
1148                                 verify(nvlist_lookup_string(propval,
1149                                     ZPROP_VALUE, &strval) == 0);
1150                                 verify(nvlist_lookup_string(propval,
1151                                     ZPROP_SOURCE, &sourceval) == 0);
1152
1153                                 if (strcmp(sourceval,
1154                                     zfs_get_name(zhp)) == 0) {
1155                                         sourcetype = ZPROP_SRC_LOCAL;
1156                                 } else {
1157                                         sourcetype = ZPROP_SRC_INHERITED;
1158                                         (void) strlcpy(source,
1159                                             sourceval, sizeof (source));
1160                                 }
1161                         }
1162
1163                         zprop_print_one_property(zfs_get_name(zhp), cbp,
1164                             pl->pl_user_prop, strval, sourcetype,
1165                             source);
1166                 }
1167         }
1168
1169         return (0);
1170 }
1171
1172 static int
1173 zfs_do_get(int argc, char **argv)
1174 {
1175         zprop_get_cbdata_t cb = { 0 };
1176         int i, c, flags = 0;
1177         char *value, *fields;
1178         int ret;
1179         int limit = 0;
1180         zprop_list_t fake_name = { 0 };
1181
1182         /*
1183          * Set up default columns and sources.
1184          */
1185         cb.cb_sources = ZPROP_SRC_ALL;
1186         cb.cb_columns[0] = GET_COL_NAME;
1187         cb.cb_columns[1] = GET_COL_PROPERTY;
1188         cb.cb_columns[2] = GET_COL_VALUE;
1189         cb.cb_columns[3] = GET_COL_SOURCE;
1190         cb.cb_type = ZFS_TYPE_DATASET;
1191
1192         /* check options */
1193         while ((c = getopt(argc, argv, ":d:o:s:rHp")) != -1) {
1194                 switch (c) {
1195                 case 'p':
1196                         cb.cb_literal = B_TRUE;
1197                         break;
1198                 case 'd':
1199                         limit = parse_depth(optarg, &flags);
1200                         break;
1201                 case 'r':
1202                         flags |= ZFS_ITER_RECURSE;
1203                         break;
1204                 case 'H':
1205                         cb.cb_scripted = B_TRUE;
1206                         break;
1207                 case ':':
1208                         (void) fprintf(stderr, gettext("missing argument for "
1209                             "'%c' option\n"), optopt);
1210                         usage(B_FALSE);
1211                         break;
1212                 case 'o':
1213                         /*
1214                          * Process the set of columns to display.  We zero out
1215                          * the structure to give us a blank slate.
1216                          */
1217                         bzero(&cb.cb_columns, sizeof (cb.cb_columns));
1218                         i = 0;
1219                         while (*optarg != '\0') {
1220                                 static char *col_subopts[] =
1221                                     { "name", "property", "value", "source",
1222                                     NULL };
1223
1224                                 if (i == 4) {
1225                                         (void) fprintf(stderr, gettext("too "
1226                                             "many fields given to -o "
1227                                             "option\n"));
1228                                         usage(B_FALSE);
1229                                 }
1230
1231                                 switch (getsubopt(&optarg, col_subopts,
1232                                     &value)) {
1233                                 case 0:
1234                                         cb.cb_columns[i++] = GET_COL_NAME;
1235                                         break;
1236                                 case 1:
1237                                         cb.cb_columns[i++] = GET_COL_PROPERTY;
1238                                         break;
1239                                 case 2:
1240                                         cb.cb_columns[i++] = GET_COL_VALUE;
1241                                         break;
1242                                 case 3:
1243                                         cb.cb_columns[i++] = GET_COL_SOURCE;
1244                                         break;
1245                                 default:
1246                                         (void) fprintf(stderr,
1247                                             gettext("invalid column name "
1248                                             "'%s'\n"), value);
1249                                         usage(B_FALSE);
1250                                 }
1251                         }
1252                         break;
1253
1254                 case 's':
1255                         cb.cb_sources = 0;
1256                         while (*optarg != '\0') {
1257                                 static char *source_subopts[] = {
1258                                         "local", "default", "inherited",
1259                                         "temporary", "none", NULL };
1260
1261                                 switch (getsubopt(&optarg, source_subopts,
1262                                     &value)) {
1263                                 case 0:
1264                                         cb.cb_sources |= ZPROP_SRC_LOCAL;
1265                                         break;
1266                                 case 1:
1267                                         cb.cb_sources |= ZPROP_SRC_DEFAULT;
1268                                         break;
1269                                 case 2:
1270                                         cb.cb_sources |= ZPROP_SRC_INHERITED;
1271                                         break;
1272                                 case 3:
1273                                         cb.cb_sources |= ZPROP_SRC_TEMPORARY;
1274                                         break;
1275                                 case 4:
1276                                         cb.cb_sources |= ZPROP_SRC_NONE;
1277                                         break;
1278                                 default:
1279                                         (void) fprintf(stderr,
1280                                             gettext("invalid source "
1281                                             "'%s'\n"), value);
1282                                         usage(B_FALSE);
1283                                 }
1284                         }
1285                         break;
1286
1287                 case '?':
1288                         (void) fprintf(stderr, gettext("invalid option '%c'\n"),
1289                             optopt);
1290                         usage(B_FALSE);
1291                 }
1292         }
1293
1294         argc -= optind;
1295         argv += optind;
1296
1297         if (argc < 1) {
1298                 (void) fprintf(stderr, gettext("missing property "
1299                     "argument\n"));
1300                 usage(B_FALSE);
1301         }
1302
1303         fields = argv[0];
1304
1305         if (zprop_get_list(g_zfs, fields, &cb.cb_proplist, ZFS_TYPE_DATASET)
1306             != 0)
1307                 usage(B_FALSE);
1308
1309         argc--;
1310         argv++;
1311
1312         /*
1313          * As part of zfs_expand_proplist(), we keep track of the maximum column
1314          * width for each property.  For the 'NAME' (and 'SOURCE') columns, we
1315          * need to know the maximum name length.  However, the user likely did
1316          * not specify 'name' as one of the properties to fetch, so we need to
1317          * make sure we always include at least this property for
1318          * print_get_headers() to work properly.
1319          */
1320         if (cb.cb_proplist != NULL) {
1321                 fake_name.pl_prop = ZFS_PROP_NAME;
1322                 fake_name.pl_width = strlen(gettext("NAME"));
1323                 fake_name.pl_next = cb.cb_proplist;
1324                 cb.cb_proplist = &fake_name;
1325         }
1326
1327         cb.cb_first = B_TRUE;
1328
1329         /* run for each object */
1330         ret = zfs_for_each(argc, argv, flags, ZFS_TYPE_DATASET, NULL,
1331             &cb.cb_proplist, limit, get_callback, &cb);
1332
1333         if (cb.cb_proplist == &fake_name)
1334                 zprop_free_list(fake_name.pl_next);
1335         else
1336                 zprop_free_list(cb.cb_proplist);
1337
1338         return (ret);
1339 }
1340
1341 /*
1342  * inherit [-r] <property> <fs|vol> ...
1343  *
1344  *      -r      Recurse over all children
1345  *
1346  * For each dataset specified on the command line, inherit the given property
1347  * from its parent.  Inheriting a property at the pool level will cause it to
1348  * use the default value.  The '-r' flag will recurse over all children, and is
1349  * useful for setting a property on a hierarchy-wide basis, regardless of any
1350  * local modifications for each dataset.
1351  */
1352
1353 static int
1354 inherit_recurse_cb(zfs_handle_t *zhp, void *data)
1355 {
1356         char *propname = data;
1357         zfs_prop_t prop = zfs_name_to_prop(propname);
1358
1359         /*
1360          * If we're doing it recursively, then ignore properties that
1361          * are not valid for this type of dataset.
1362          */
1363         if (prop != ZPROP_INVAL &&
1364             !zfs_prop_valid_for_type(prop, zfs_get_type(zhp)))
1365                 return (0);
1366
1367         return (zfs_prop_inherit(zhp, propname) != 0);
1368 }
1369
1370 static int
1371 inherit_cb(zfs_handle_t *zhp, void *data)
1372 {
1373         char *propname = data;
1374
1375         return (zfs_prop_inherit(zhp, propname) != 0);
1376 }
1377
1378 static int
1379 zfs_do_inherit(int argc, char **argv)
1380 {
1381         int c;
1382         zfs_prop_t prop;
1383         char *propname;
1384         int ret;
1385         int flags = 0;
1386
1387         /* check options */
1388         while ((c = getopt(argc, argv, "r")) != -1) {
1389                 switch (c) {
1390                 case 'r':
1391                         flags |= ZFS_ITER_RECURSE;
1392                         break;
1393                 case '?':
1394                 default:
1395                         (void) fprintf(stderr, gettext("invalid option '%c'\n"),
1396                             optopt);
1397                         usage(B_FALSE);
1398                 }
1399         }
1400
1401         argc -= optind;
1402         argv += optind;
1403
1404         /* check number of arguments */
1405         if (argc < 1) {
1406                 (void) fprintf(stderr, gettext("missing property argument\n"));
1407                 usage(B_FALSE);
1408         }
1409         if (argc < 2) {
1410                 (void) fprintf(stderr, gettext("missing dataset argument\n"));
1411                 usage(B_FALSE);
1412         }
1413
1414         propname = argv[0];
1415         argc--;
1416         argv++;
1417
1418         if ((prop = zfs_name_to_prop(propname)) != ZPROP_INVAL) {
1419                 if (zfs_prop_readonly(prop)) {
1420                         (void) fprintf(stderr, gettext(
1421                             "%s property is read-only\n"),
1422                             propname);
1423                         return (1);
1424                 }
1425                 if (!zfs_prop_inheritable(prop)) {
1426                         (void) fprintf(stderr, gettext("'%s' property cannot "
1427                             "be inherited\n"), propname);
1428                         if (prop == ZFS_PROP_QUOTA ||
1429                             prop == ZFS_PROP_RESERVATION ||
1430                             prop == ZFS_PROP_REFQUOTA ||
1431                             prop == ZFS_PROP_REFRESERVATION)
1432                                 (void) fprintf(stderr, gettext("use 'zfs set "
1433                                     "%s=none' to clear\n"), propname);
1434                         return (1);
1435                 }
1436         } else if (!zfs_prop_user(propname)) {
1437                 (void) fprintf(stderr, gettext("invalid property '%s'\n"),
1438                     propname);
1439                 usage(B_FALSE);
1440         }
1441
1442         if (flags & ZFS_ITER_RECURSE) {
1443                 ret = zfs_for_each(argc, argv, flags, ZFS_TYPE_DATASET,
1444                     NULL, NULL, 0, inherit_recurse_cb, propname);
1445         } else {
1446                 ret = zfs_for_each(argc, argv, flags, ZFS_TYPE_DATASET,
1447                     NULL, NULL, 0, inherit_cb, propname);
1448         }
1449
1450         return (ret);
1451 }
1452
1453 typedef struct upgrade_cbdata {
1454         uint64_t cb_numupgraded;
1455         uint64_t cb_numsamegraded;
1456         uint64_t cb_numfailed;
1457         uint64_t cb_version;
1458         boolean_t cb_newer;
1459         boolean_t cb_foundone;
1460         char cb_lastfs[ZFS_MAXNAMELEN];
1461 } upgrade_cbdata_t;
1462
1463 static int
1464 same_pool(zfs_handle_t *zhp, const char *name)
1465 {
1466         int len1 = strcspn(name, "/@");
1467         const char *zhname = zfs_get_name(zhp);
1468         int len2 = strcspn(zhname, "/@");
1469
1470         if (len1 != len2)
1471                 return (B_FALSE);
1472         return (strncmp(name, zhname, len1) == 0);
1473 }
1474
1475 static int
1476 upgrade_list_callback(zfs_handle_t *zhp, void *data)
1477 {
1478         upgrade_cbdata_t *cb = data;
1479         int version = zfs_prop_get_int(zhp, ZFS_PROP_VERSION);
1480
1481         /* list if it's old/new */
1482         if ((!cb->cb_newer && version < ZPL_VERSION) ||
1483             (cb->cb_newer && version > ZPL_VERSION)) {
1484                 char *str;
1485                 if (cb->cb_newer) {
1486                         str = gettext("The following filesystems are "
1487                             "formatted using a newer software version and\n"
1488                             "cannot be accessed on the current system.\n\n");
1489                 } else {
1490                         str = gettext("The following filesystems are "
1491                             "out of date, and can be upgraded.  After being\n"
1492                             "upgraded, these filesystems (and any 'zfs send' "
1493                             "streams generated from\n"
1494                             "subsequent snapshots) will no longer be "
1495                             "accessible by older software versions.\n\n");
1496                 }
1497
1498                 if (!cb->cb_foundone) {
1499                         (void) puts(str);
1500                         (void) printf(gettext("VER  FILESYSTEM\n"));
1501                         (void) printf(gettext("---  ------------\n"));
1502                         cb->cb_foundone = B_TRUE;
1503                 }
1504
1505                 (void) printf("%2u   %s\n", version, zfs_get_name(zhp));
1506         }
1507
1508         return (0);
1509 }
1510
1511 static int
1512 upgrade_set_callback(zfs_handle_t *zhp, void *data)
1513 {
1514         upgrade_cbdata_t *cb = data;
1515         int version = zfs_prop_get_int(zhp, ZFS_PROP_VERSION);
1516         int i;
1517         static struct { int zplver; int spaver; } table[] = {
1518                 {ZPL_VERSION_FUID, SPA_VERSION_FUID},
1519                 {ZPL_VERSION_USERSPACE, SPA_VERSION_USERSPACE},
1520                 {0, 0}
1521         };
1522
1523
1524         for (i = 0; table[i].zplver; i++) {
1525                 if (cb->cb_version >= table[i].zplver) {
1526                         int spa_version;
1527
1528                         if (zfs_spa_version(zhp, &spa_version) < 0)
1529                                 return (-1);
1530
1531                         if (spa_version < table[i].spaver) {
1532                                 /* can't upgrade */
1533                                 (void) printf(gettext("%s: can not be "
1534                                     "upgraded; the pool version needs to first "
1535                                     "be upgraded\nto version %d\n\n"),
1536                                     zfs_get_name(zhp), table[i].spaver);
1537                                 cb->cb_numfailed++;
1538                                 return (0);
1539                         }
1540                 }
1541         }
1542
1543         /* upgrade */
1544         if (version < cb->cb_version) {
1545                 char verstr[16];
1546                 (void) snprintf(verstr, sizeof (verstr),
1547                     "%llu", cb->cb_version);
1548                 if (cb->cb_lastfs[0] && !same_pool(zhp, cb->cb_lastfs)) {
1549                         /*
1550                          * If they did "zfs upgrade -a", then we could
1551                          * be doing ioctls to different pools.  We need
1552                          * to log this history once to each pool.
1553                          */
1554                         verify(zpool_stage_history(g_zfs, history_str) == 0);
1555                 }
1556                 if (zfs_prop_set(zhp, "version", verstr) == 0)
1557                         cb->cb_numupgraded++;
1558                 else
1559                         cb->cb_numfailed++;
1560                 (void) strcpy(cb->cb_lastfs, zfs_get_name(zhp));
1561         } else if (version > cb->cb_version) {
1562                 /* can't downgrade */
1563                 (void) printf(gettext("%s: can not be downgraded; "
1564                     "it is already at version %u\n"),
1565                     zfs_get_name(zhp), version);
1566                 cb->cb_numfailed++;
1567         } else {
1568                 cb->cb_numsamegraded++;
1569         }
1570         return (0);
1571 }
1572
1573 /*
1574  * zfs upgrade
1575  * zfs upgrade -v
1576  * zfs upgrade [-r] [-V <version>] <-a | filesystem>
1577  */
1578 static int
1579 zfs_do_upgrade(int argc, char **argv)
1580 {
1581         boolean_t all = B_FALSE;
1582         boolean_t showversions = B_FALSE;
1583         int ret;
1584         upgrade_cbdata_t cb = { 0 };
1585         char c;
1586         int flags = ZFS_ITER_ARGS_CAN_BE_PATHS;
1587
1588         /* check options */
1589         while ((c = getopt(argc, argv, "rvV:a")) != -1) {
1590                 switch (c) {
1591                 case 'r':
1592                         flags |= ZFS_ITER_RECURSE;
1593                         break;
1594                 case 'v':
1595                         showversions = B_TRUE;
1596                         break;
1597                 case 'V':
1598                         if (zfs_prop_string_to_index(ZFS_PROP_VERSION,
1599                             optarg, &cb.cb_version) != 0) {
1600                                 (void) fprintf(stderr,
1601                                     gettext("invalid version %s\n"), optarg);
1602                                 usage(B_FALSE);
1603                         }
1604                         break;
1605                 case 'a':
1606                         all = B_TRUE;
1607                         break;
1608                 case '?':
1609                 default:
1610                         (void) fprintf(stderr, gettext("invalid option '%c'\n"),
1611                             optopt);
1612                         usage(B_FALSE);
1613                 }
1614         }
1615
1616         argc -= optind;
1617         argv += optind;
1618
1619         if ((!all && !argc) && ((flags & ZFS_ITER_RECURSE) | cb.cb_version))
1620                 usage(B_FALSE);
1621         if (showversions && (flags & ZFS_ITER_RECURSE || all ||
1622             cb.cb_version || argc))
1623                 usage(B_FALSE);
1624         if ((all || argc) && (showversions))
1625                 usage(B_FALSE);
1626         if (all && argc)
1627                 usage(B_FALSE);
1628
1629         if (showversions) {
1630                 /* Show info on available versions. */
1631                 (void) printf(gettext("The following filesystem versions are "
1632                     "supported:\n\n"));
1633                 (void) printf(gettext("VER  DESCRIPTION\n"));
1634                 (void) printf("---  -----------------------------------------"
1635                     "---------------\n");
1636                 (void) printf(gettext(" 1   Initial ZFS filesystem version\n"));
1637                 (void) printf(gettext(" 2   Enhanced directory entries\n"));
1638                 (void) printf(gettext(" 3   Case insensitive and File system "
1639                     "unique identifier (FUID)\n"));
1640                 (void) printf(gettext(" 4   userquota, groupquota "
1641                     "properties\n"));
1642                 (void) printf(gettext("\nFor more information on a particular "
1643                     "version, including supported releases, see:\n\n"));
1644                 (void) printf("http://www.opensolaris.org/os/community/zfs/"
1645                     "version/zpl/N\n\n");
1646                 (void) printf(gettext("Where 'N' is the version number.\n"));
1647                 ret = 0;
1648         } else if (argc || all) {
1649                 /* Upgrade filesystems */
1650                 if (cb.cb_version == 0)
1651                         cb.cb_version = ZPL_VERSION;
1652                 ret = zfs_for_each(argc, argv, flags, ZFS_TYPE_FILESYSTEM,
1653                     NULL, NULL, 0, upgrade_set_callback, &cb);
1654                 (void) printf(gettext("%llu filesystems upgraded\n"),
1655                     cb.cb_numupgraded);
1656                 if (cb.cb_numsamegraded) {
1657                         (void) printf(gettext("%llu filesystems already at "
1658                             "this version\n"),
1659                             cb.cb_numsamegraded);
1660                 }
1661                 if (cb.cb_numfailed != 0)
1662                         ret = 1;
1663         } else {
1664                 /* List old-version filesytems */
1665                 boolean_t found;
1666                 (void) printf(gettext("This system is currently running "
1667                     "ZFS filesystem version %llu.\n\n"), ZPL_VERSION);
1668
1669                 flags |= ZFS_ITER_RECURSE;
1670                 ret = zfs_for_each(0, NULL, flags, ZFS_TYPE_FILESYSTEM,
1671                     NULL, NULL, 0, upgrade_list_callback, &cb);
1672
1673                 found = cb.cb_foundone;
1674                 cb.cb_foundone = B_FALSE;
1675                 cb.cb_newer = B_TRUE;
1676
1677                 ret = zfs_for_each(0, NULL, flags, ZFS_TYPE_FILESYSTEM,
1678                     NULL, NULL, 0, upgrade_list_callback, &cb);
1679
1680                 if (!cb.cb_foundone && !found) {
1681                         (void) printf(gettext("All filesystems are "
1682                             "formatted with the current version.\n"));
1683                 }
1684         }
1685
1686         return (ret);
1687 }
1688
1689 /*
1690  * zfs userspace
1691  */
1692 static int
1693 userspace_cb(void *arg, const char *domain, uid_t rid, uint64_t space)
1694 {
1695         zfs_userquota_prop_t *typep = arg;
1696         zfs_userquota_prop_t p = *typep;
1697         char *name = NULL;
1698         char *ug, *propname;
1699         char namebuf[32];
1700         char sizebuf[32];
1701
1702         if (domain == NULL || domain[0] == '\0') {
1703                 if (p == ZFS_PROP_GROUPUSED || p == ZFS_PROP_GROUPQUOTA) {
1704                         struct group *g = getgrgid(rid);
1705                         if (g)
1706                                 name = g->gr_name;
1707                 } else {
1708                         struct passwd *p = getpwuid(rid);
1709                         if (p)
1710                                 name = p->pw_name;
1711                 }
1712         }
1713
1714         if (p == ZFS_PROP_GROUPUSED || p == ZFS_PROP_GROUPQUOTA)
1715                 ug = "group";
1716         else
1717                 ug = "user";
1718
1719         if (p == ZFS_PROP_USERUSED || p == ZFS_PROP_GROUPUSED)
1720                 propname = "used";
1721         else
1722                 propname = "quota";
1723
1724         if (name == NULL) {
1725                 (void) snprintf(namebuf, sizeof (namebuf),
1726                     "%llu", (longlong_t)rid);
1727                 name = namebuf;
1728         }
1729         zfs_nicenum(space, sizebuf, sizeof (sizebuf));
1730
1731         (void) printf("%s %s %s%c%s %s\n", propname, ug, domain,
1732             domain[0] ? '-' : ' ', name, sizebuf);
1733
1734         return (0);
1735 }
1736
1737 static int
1738 zfs_do_userspace(int argc, char **argv)
1739 {
1740         zfs_handle_t *zhp;
1741         zfs_userquota_prop_t p;
1742         int error;
1743
1744         /*
1745          * Try the python version.  If the execv fails, we'll continue
1746          * and do a simplistic implementation.
1747          */
1748         (void) execv(pypath, argv-1);
1749
1750         (void) printf("internal error: %s not found\n"
1751             "falling back on built-in implementation, "
1752             "some features will not work\n", pypath);
1753
1754         if ((zhp = zfs_open(g_zfs, argv[argc-1], ZFS_TYPE_DATASET)) == NULL)
1755                 return (1);
1756
1757         (void) printf("PROP TYPE NAME VALUE\n");
1758
1759         for (p = 0; p < ZFS_NUM_USERQUOTA_PROPS; p++) {
1760                 error = zfs_userspace(zhp, p, userspace_cb, &p);
1761                 if (error)
1762                         break;
1763         }
1764         return (error);
1765 }
1766
1767 /*
1768  * list [-r][-d max] [-H] [-o property[,property]...] [-t type[,type]...]
1769  *      [-s property [-s property]...] [-S property [-S property]...]
1770  *      <dataset> ...
1771  *
1772  *      -r      Recurse over all children
1773  *      -d      Limit recursion by depth.
1774  *      -H      Scripted mode; elide headers and separate columns by tabs
1775  *      -o      Control which fields to display.
1776  *      -t      Control which object types to display.
1777  *      -s      Specify sort columns, descending order.
1778  *      -S      Specify sort columns, ascending order.
1779  *
1780  * When given no arguments, lists all filesystems in the system.
1781  * Otherwise, list the specified datasets, optionally recursing down them if
1782  * '-r' is specified.
1783  */
1784 typedef struct list_cbdata {
1785         boolean_t       cb_first;
1786         boolean_t       cb_scripted;
1787         zprop_list_t    *cb_proplist;
1788 } list_cbdata_t;
1789
1790 /*
1791  * Given a list of columns to display, output appropriate headers for each one.
1792  */
1793 static void
1794 print_header(zprop_list_t *pl)
1795 {
1796         char headerbuf[ZFS_MAXPROPLEN];
1797         const char *header;
1798         int i;
1799         boolean_t first = B_TRUE;
1800         boolean_t right_justify;
1801
1802         for (; pl != NULL; pl = pl->pl_next) {
1803                 if (!first) {
1804                         (void) printf("  ");
1805                 } else {
1806                         first = B_FALSE;
1807                 }
1808
1809                 right_justify = B_FALSE;
1810                 if (pl->pl_prop != ZPROP_INVAL) {
1811                         header = zfs_prop_column_name(pl->pl_prop);
1812                         right_justify = zfs_prop_align_right(pl->pl_prop);
1813                 } else {
1814                         for (i = 0; pl->pl_user_prop[i] != '\0'; i++)
1815                                 headerbuf[i] = toupper(pl->pl_user_prop[i]);
1816                         headerbuf[i] = '\0';
1817                         header = headerbuf;
1818                 }
1819
1820                 if (pl->pl_next == NULL && !right_justify)
1821                         (void) printf("%s", header);
1822                 else if (right_justify)
1823                         (void) printf("%*s", pl->pl_width, header);
1824                 else
1825                         (void) printf("%-*s", pl->pl_width, header);
1826         }
1827
1828         (void) printf("\n");
1829 }
1830
1831 /*
1832  * Given a dataset and a list of fields, print out all the properties according
1833  * to the described layout.
1834  */
1835 static void
1836 print_dataset(zfs_handle_t *zhp, zprop_list_t *pl, boolean_t scripted)
1837 {
1838         boolean_t first = B_TRUE;
1839         char property[ZFS_MAXPROPLEN];
1840         nvlist_t *userprops = zfs_get_user_props(zhp);
1841         nvlist_t *propval;
1842         char *propstr;
1843         boolean_t right_justify;
1844         int width;
1845
1846         for (; pl != NULL; pl = pl->pl_next) {
1847                 if (!first) {
1848                         if (scripted)
1849                                 (void) printf("\t");
1850                         else
1851                                 (void) printf("  ");
1852                 } else {
1853                         first = B_FALSE;
1854                 }
1855
1856                 if (pl->pl_prop != ZPROP_INVAL) {
1857                         if (zfs_prop_get(zhp, pl->pl_prop, property,
1858                             sizeof (property), NULL, NULL, 0, B_FALSE) != 0)
1859                                 propstr = "-";
1860                         else
1861                                 propstr = property;
1862
1863                         right_justify = zfs_prop_align_right(pl->pl_prop);
1864                 } else if (zfs_prop_userquota(pl->pl_user_prop)) {
1865                         if (zfs_prop_get_userquota(zhp, pl->pl_user_prop,
1866                             property, sizeof (property), B_FALSE) != 0)
1867                                 propstr = "-";
1868                         else
1869                                 propstr = property;
1870                         right_justify = B_TRUE;
1871                 } else {
1872                         if (nvlist_lookup_nvlist(userprops,
1873                             pl->pl_user_prop, &propval) != 0)
1874                                 propstr = "-";
1875                         else
1876                                 verify(nvlist_lookup_string(propval,
1877                                     ZPROP_VALUE, &propstr) == 0);
1878                         right_justify = B_FALSE;
1879                 }
1880
1881                 width = pl->pl_width;
1882
1883                 /*
1884                  * If this is being called in scripted mode, or if this is the
1885                  * last column and it is left-justified, don't include a width
1886                  * format specifier.
1887                  */
1888                 if (scripted || (pl->pl_next == NULL && !right_justify))
1889                         (void) printf("%s", propstr);
1890                 else if (right_justify)
1891                         (void) printf("%*s", width, propstr);
1892                 else
1893                         (void) printf("%-*s", width, propstr);
1894         }
1895
1896         (void) printf("\n");
1897 }
1898
1899 /*
1900  * Generic callback function to list a dataset or snapshot.
1901  */
1902 static int
1903 list_callback(zfs_handle_t *zhp, void *data)
1904 {
1905         list_cbdata_t *cbp = data;
1906
1907         if (cbp->cb_first) {
1908                 if (!cbp->cb_scripted)
1909                         print_header(cbp->cb_proplist);
1910                 cbp->cb_first = B_FALSE;
1911         }
1912
1913         print_dataset(zhp, cbp->cb_proplist, cbp->cb_scripted);
1914
1915         return (0);
1916 }
1917
1918 static int
1919 zfs_do_list(int argc, char **argv)
1920 {
1921         int c;
1922         boolean_t scripted = B_FALSE;
1923         static char default_fields[] =
1924             "name,used,available,referenced,mountpoint";
1925         int types = ZFS_TYPE_DATASET;
1926         boolean_t types_specified = B_FALSE;
1927         char *fields = NULL;
1928         list_cbdata_t cb = { 0 };
1929         char *value;
1930         int limit = 0;
1931         int ret;
1932         zfs_sort_column_t *sortcol = NULL;
1933         int flags = ZFS_ITER_PROP_LISTSNAPS | ZFS_ITER_ARGS_CAN_BE_PATHS;
1934
1935         /* check options */
1936         while ((c = getopt(argc, argv, ":d:o:rt:Hs:S:")) != -1) {
1937                 switch (c) {
1938                 case 'o':
1939                         fields = optarg;
1940                         break;
1941                 case 'd':
1942                         limit = parse_depth(optarg, &flags);
1943                         break;
1944                 case 'r':
1945                         flags |= ZFS_ITER_RECURSE;
1946                         break;
1947                 case 'H':
1948                         scripted = B_TRUE;
1949                         break;
1950                 case 's':
1951                         if (zfs_add_sort_column(&sortcol, optarg,
1952                             B_FALSE) != 0) {
1953                                 (void) fprintf(stderr,
1954                                     gettext("invalid property '%s'\n"), optarg);
1955                                 usage(B_FALSE);
1956                         }
1957                         break;
1958                 case 'S':
1959                         if (zfs_add_sort_column(&sortcol, optarg,
1960                             B_TRUE) != 0) {
1961                                 (void) fprintf(stderr,
1962                                     gettext("invalid property '%s'\n"), optarg);
1963                                 usage(B_FALSE);
1964                         }
1965                         break;
1966                 case 't':
1967                         types = 0;
1968                         types_specified = B_TRUE;
1969                         flags &= ~ZFS_ITER_PROP_LISTSNAPS;
1970                         while (*optarg != '\0') {
1971                                 static char *type_subopts[] = { "filesystem",
1972                                     "volume", "snapshot", "all", NULL };
1973
1974                                 switch (getsubopt(&optarg, type_subopts,
1975                                     &value)) {
1976                                 case 0:
1977                                         types |= ZFS_TYPE_FILESYSTEM;
1978                                         break;
1979                                 case 1:
1980                                         types |= ZFS_TYPE_VOLUME;
1981                                         break;
1982                                 case 2:
1983                                         types |= ZFS_TYPE_SNAPSHOT;
1984                                         break;
1985                                 case 3:
1986                                         types = ZFS_TYPE_DATASET;
1987                                         break;
1988
1989                                 default:
1990                                         (void) fprintf(stderr,
1991                                             gettext("invalid type '%s'\n"),
1992                                             value);
1993                                         usage(B_FALSE);
1994                                 }
1995                         }
1996                         break;
1997                 case ':':
1998                         (void) fprintf(stderr, gettext("missing argument for "
1999                             "'%c' option\n"), optopt);
2000                         usage(B_FALSE);
2001                         break;
2002                 case '?':
2003                         (void) fprintf(stderr, gettext("invalid option '%c'\n"),
2004                             optopt);
2005                         usage(B_FALSE);
2006                 }
2007         }
2008
2009         argc -= optind;
2010         argv += optind;
2011
2012         if (fields == NULL)
2013                 fields = default_fields;
2014
2015         /*
2016          * If "-o space" and no types were specified, don't display snapshots.
2017          */
2018         if (strcmp(fields, "space") == 0 && types_specified == B_FALSE)
2019                 types &= ~ZFS_TYPE_SNAPSHOT;
2020
2021         /*
2022          * If the user specifies '-o all', the zprop_get_list() doesn't
2023          * normally include the name of the dataset.  For 'zfs list', we always
2024          * want this property to be first.
2025          */
2026         if (zprop_get_list(g_zfs, fields, &cb.cb_proplist, ZFS_TYPE_DATASET)
2027             != 0)
2028                 usage(B_FALSE);
2029
2030         cb.cb_scripted = scripted;
2031         cb.cb_first = B_TRUE;
2032
2033         ret = zfs_for_each(argc, argv, flags, types, sortcol, &cb.cb_proplist,
2034             limit, list_callback, &cb);
2035
2036         zprop_free_list(cb.cb_proplist);
2037         zfs_free_sort_columns(sortcol);
2038
2039         if (ret == 0 && cb.cb_first && !cb.cb_scripted)
2040                 (void) printf(gettext("no datasets available\n"));
2041
2042         return (ret);
2043 }
2044
2045 /*
2046  * zfs rename <fs | snap | vol> <fs | snap | vol>
2047  * zfs rename -p <fs | vol> <fs | vol>
2048  * zfs rename -r <snap> <snap>
2049  *
2050  * Renames the given dataset to another of the same type.
2051  *
2052  * The '-p' flag creates all the non-existing ancestors of the target first.
2053  */
2054 /* ARGSUSED */
2055 static int
2056 zfs_do_rename(int argc, char **argv)
2057 {
2058         zfs_handle_t *zhp;
2059         int c;
2060         int ret;
2061         boolean_t recurse = B_FALSE;
2062         boolean_t parents = B_FALSE;
2063
2064         /* check options */
2065         while ((c = getopt(argc, argv, "pr")) != -1) {
2066                 switch (c) {
2067                 case 'p':
2068                         parents = B_TRUE;
2069                         break;
2070                 case 'r':
2071                         recurse = B_TRUE;
2072                         break;
2073                 case '?':
2074                 default:
2075                         (void) fprintf(stderr, gettext("invalid option '%c'\n"),
2076                             optopt);
2077                         usage(B_FALSE);
2078                 }
2079         }
2080
2081         argc -= optind;
2082         argv += optind;
2083
2084         /* check number of arguments */
2085         if (argc < 1) {
2086                 (void) fprintf(stderr, gettext("missing source dataset "
2087                     "argument\n"));
2088                 usage(B_FALSE);
2089         }
2090         if (argc < 2) {
2091                 (void) fprintf(stderr, gettext("missing target dataset "
2092                     "argument\n"));
2093                 usage(B_FALSE);
2094         }
2095         if (argc > 2) {
2096                 (void) fprintf(stderr, gettext("too many arguments\n"));
2097                 usage(B_FALSE);
2098         }
2099
2100         if (recurse && parents) {
2101                 (void) fprintf(stderr, gettext("-p and -r options are mutually "
2102                     "exclusive\n"));
2103                 usage(B_FALSE);
2104         }
2105
2106         if (recurse && strchr(argv[0], '@') == 0) {
2107                 (void) fprintf(stderr, gettext("source dataset for recursive "
2108                     "rename must be a snapshot\n"));
2109                 usage(B_FALSE);
2110         }
2111
2112         if ((zhp = zfs_open(g_zfs, argv[0], parents ? ZFS_TYPE_FILESYSTEM |
2113             ZFS_TYPE_VOLUME : ZFS_TYPE_DATASET)) == NULL)
2114                 return (1);
2115
2116         /* If we were asked and the name looks good, try to create ancestors. */
2117         if (parents && zfs_name_valid(argv[1], zfs_get_type(zhp)) &&
2118             zfs_create_ancestors(g_zfs, argv[1]) != 0) {
2119                 zfs_close(zhp);
2120                 return (1);
2121         }
2122
2123         ret = (zfs_rename(zhp, argv[1], recurse) != 0);
2124
2125         zfs_close(zhp);
2126         return (ret);
2127 }
2128
2129 /*
2130  * zfs promote <fs>
2131  *
2132  * Promotes the given clone fs to be the parent
2133  */
2134 /* ARGSUSED */
2135 static int
2136 zfs_do_promote(int argc, char **argv)
2137 {
2138         zfs_handle_t *zhp;
2139         int ret;
2140
2141         /* check options */
2142         if (argc > 1 && argv[1][0] == '-') {
2143                 (void) fprintf(stderr, gettext("invalid option '%c'\n"),
2144                     argv[1][1]);
2145                 usage(B_FALSE);
2146         }
2147
2148         /* check number of arguments */
2149         if (argc < 2) {
2150                 (void) fprintf(stderr, gettext("missing clone filesystem"
2151                     " argument\n"));
2152                 usage(B_FALSE);
2153         }
2154         if (argc > 2) {
2155                 (void) fprintf(stderr, gettext("too many arguments\n"));
2156                 usage(B_FALSE);
2157         }
2158
2159         zhp = zfs_open(g_zfs, argv[1], ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME);
2160         if (zhp == NULL)
2161                 return (1);
2162
2163         ret = (zfs_promote(zhp) != 0);
2164
2165
2166         zfs_close(zhp);
2167         return (ret);
2168 }
2169
2170 /*
2171  * zfs rollback [-rRf] <snapshot>
2172  *
2173  *      -r      Delete any intervening snapshots before doing rollback
2174  *      -R      Delete any snapshots and their clones
2175  *      -f      ignored for backwards compatability
2176  *
2177  * Given a filesystem, rollback to a specific snapshot, discarding any changes
2178  * since then and making it the active dataset.  If more recent snapshots exist,
2179  * the command will complain unless the '-r' flag is given.
2180  */
2181 typedef struct rollback_cbdata {
2182         uint64_t        cb_create;
2183         boolean_t       cb_first;
2184         int             cb_doclones;
2185         char            *cb_target;
2186         int             cb_error;
2187         boolean_t       cb_recurse;
2188         boolean_t       cb_dependent;
2189 } rollback_cbdata_t;
2190
2191 /*
2192  * Report any snapshots more recent than the one specified.  Used when '-r' is
2193  * not specified.  We reuse this same callback for the snapshot dependents - if
2194  * 'cb_dependent' is set, then this is a dependent and we should report it
2195  * without checking the transaction group.
2196  */
2197 static int
2198 rollback_check(zfs_handle_t *zhp, void *data)
2199 {
2200         rollback_cbdata_t *cbp = data;
2201
2202         if (cbp->cb_doclones) {
2203                 zfs_close(zhp);
2204                 return (0);
2205         }
2206
2207         if (!cbp->cb_dependent) {
2208                 if (strcmp(zfs_get_name(zhp), cbp->cb_target) != 0 &&
2209                     zfs_get_type(zhp) == ZFS_TYPE_SNAPSHOT &&
2210                     zfs_prop_get_int(zhp, ZFS_PROP_CREATETXG) >
2211                     cbp->cb_create) {
2212
2213                         if (cbp->cb_first && !cbp->cb_recurse) {
2214                                 (void) fprintf(stderr, gettext("cannot "
2215                                     "rollback to '%s': more recent snapshots "
2216                                     "exist\n"),
2217                                     cbp->cb_target);
2218                                 (void) fprintf(stderr, gettext("use '-r' to "
2219                                     "force deletion of the following "
2220                                     "snapshots:\n"));
2221                                 cbp->cb_first = 0;
2222                                 cbp->cb_error = 1;
2223                         }
2224
2225                         if (cbp->cb_recurse) {
2226                                 cbp->cb_dependent = B_TRUE;
2227                                 if (zfs_iter_dependents(zhp, B_TRUE,
2228                                     rollback_check, cbp) != 0) {
2229                                         zfs_close(zhp);
2230                                         return (-1);
2231                                 }
2232                                 cbp->cb_dependent = B_FALSE;
2233                         } else {
2234                                 (void) fprintf(stderr, "%s\n",
2235                                     zfs_get_name(zhp));
2236                         }
2237                 }
2238         } else {
2239                 if (cbp->cb_first && cbp->cb_recurse) {
2240                         (void) fprintf(stderr, gettext("cannot rollback to "
2241                             "'%s': clones of previous snapshots exist\n"),
2242                             cbp->cb_target);
2243                         (void) fprintf(stderr, gettext("use '-R' to "
2244                             "force deletion of the following clones and "
2245                             "dependents:\n"));
2246                         cbp->cb_first = 0;
2247                         cbp->cb_error = 1;
2248                 }
2249
2250                 (void) fprintf(stderr, "%s\n", zfs_get_name(zhp));
2251         }
2252
2253         zfs_close(zhp);
2254         return (0);
2255 }
2256
2257 static int
2258 zfs_do_rollback(int argc, char **argv)
2259 {
2260         int ret;
2261         int c;
2262         boolean_t force = B_FALSE;
2263         rollback_cbdata_t cb = { 0 };
2264         zfs_handle_t *zhp, *snap;
2265         char parentname[ZFS_MAXNAMELEN];
2266         char *delim;
2267
2268         /* check options */
2269         while ((c = getopt(argc, argv, "rRf")) != -1) {
2270                 switch (c) {
2271                 case 'r':
2272                         cb.cb_recurse = 1;
2273                         break;
2274                 case 'R':
2275                         cb.cb_recurse = 1;
2276                         cb.cb_doclones = 1;
2277                         break;
2278                 case 'f':
2279                         force = B_TRUE;
2280                         break;
2281                 case '?':
2282                         (void) fprintf(stderr, gettext("invalid option '%c'\n"),
2283                             optopt);
2284                         usage(B_FALSE);
2285                 }
2286         }
2287
2288         argc -= optind;
2289         argv += optind;
2290
2291         /* check number of arguments */
2292         if (argc < 1) {
2293                 (void) fprintf(stderr, gettext("missing dataset argument\n"));
2294                 usage(B_FALSE);
2295         }
2296         if (argc > 1) {
2297                 (void) fprintf(stderr, gettext("too many arguments\n"));
2298                 usage(B_FALSE);
2299         }
2300
2301         /* open the snapshot */
2302         if ((snap = zfs_open(g_zfs, argv[0], ZFS_TYPE_SNAPSHOT)) == NULL)
2303                 return (1);
2304
2305         /* open the parent dataset */
2306         (void) strlcpy(parentname, argv[0], sizeof (parentname));
2307         verify((delim = strrchr(parentname, '@')) != NULL);
2308         *delim = '\0';
2309         if ((zhp = zfs_open(g_zfs, parentname, ZFS_TYPE_DATASET)) == NULL) {
2310                 zfs_close(snap);
2311                 return (1);
2312         }
2313
2314         /*
2315          * Check for more recent snapshots and/or clones based on the presence
2316          * of '-r' and '-R'.
2317          */
2318         cb.cb_target = argv[0];
2319         cb.cb_create = zfs_prop_get_int(snap, ZFS_PROP_CREATETXG);
2320         cb.cb_first = B_TRUE;
2321         cb.cb_error = 0;
2322         if ((ret = zfs_iter_children(zhp, rollback_check, &cb)) != 0)
2323                 goto out;
2324
2325         if ((ret = cb.cb_error) != 0)
2326                 goto out;
2327
2328         /*
2329          * Rollback parent to the given snapshot.
2330          */
2331         ret = zfs_rollback(zhp, snap, force);
2332
2333 out:
2334         zfs_close(snap);
2335         zfs_close(zhp);
2336
2337         if (ret == 0)
2338                 return (0);
2339         else
2340                 return (1);
2341 }
2342
2343 /*
2344  * zfs set property=value { fs | snap | vol } ...
2345  *
2346  * Sets the given property for all datasets specified on the command line.
2347  */
2348 typedef struct set_cbdata {
2349         char            *cb_propname;
2350         char            *cb_value;
2351 } set_cbdata_t;
2352
2353 static int
2354 set_callback(zfs_handle_t *zhp, void *data)
2355 {
2356         set_cbdata_t *cbp = data;
2357
2358         if (zfs_prop_set(zhp, cbp->cb_propname, cbp->cb_value) != 0) {
2359                 switch (libzfs_errno(g_zfs)) {
2360                 case EZFS_MOUNTFAILED:
2361                         (void) fprintf(stderr, gettext("property may be set "
2362                             "but unable to remount filesystem\n"));
2363                         break;
2364                 case EZFS_SHARENFSFAILED:
2365                         (void) fprintf(stderr, gettext("property may be set "
2366                             "but unable to reshare filesystem\n"));
2367                         break;
2368                 }
2369                 return (1);
2370         }
2371         return (0);
2372 }
2373
2374 static int
2375 zfs_do_set(int argc, char **argv)
2376 {
2377         set_cbdata_t cb;
2378         int ret;
2379
2380         /* check for options */
2381         if (argc > 1 && argv[1][0] == '-') {
2382                 (void) fprintf(stderr, gettext("invalid option '%c'\n"),
2383                     argv[1][1]);
2384                 usage(B_FALSE);
2385         }
2386
2387         /* check number of arguments */
2388         if (argc < 2) {
2389                 (void) fprintf(stderr, gettext("missing property=value "
2390                     "argument\n"));
2391                 usage(B_FALSE);
2392         }
2393         if (argc < 3) {
2394                 (void) fprintf(stderr, gettext("missing dataset name\n"));
2395                 usage(B_FALSE);
2396         }
2397
2398         /* validate property=value argument */
2399         cb.cb_propname = argv[1];
2400         if (((cb.cb_value = strchr(cb.cb_propname, '=')) == NULL) ||
2401             (cb.cb_value[1] == '\0')) {
2402                 (void) fprintf(stderr, gettext("missing value in "
2403                     "property=value argument\n"));
2404                 usage(B_FALSE);
2405         }
2406
2407         *cb.cb_value = '\0';
2408         cb.cb_value++;
2409
2410         if (*cb.cb_propname == '\0') {
2411                 (void) fprintf(stderr,
2412                     gettext("missing property in property=value argument\n"));
2413                 usage(B_FALSE);
2414         }
2415
2416         ret = zfs_for_each(argc - 2, argv + 2, NULL,
2417             ZFS_TYPE_DATASET, NULL, NULL, 0, set_callback, &cb);
2418
2419         return (ret);
2420 }
2421
2422 /*
2423  * zfs snapshot [-r] [-o prop=value] ... <fs@snap>
2424  *
2425  * Creates a snapshot with the given name.  While functionally equivalent to
2426  * 'zfs create', it is a separate command to differentiate intent.
2427  */
2428 static int
2429 zfs_do_snapshot(int argc, char **argv)
2430 {
2431         boolean_t recursive = B_FALSE;
2432         int ret;
2433         char c;
2434         nvlist_t *props;
2435
2436         if (nvlist_alloc(&props, NV_UNIQUE_NAME, 0) != 0) {
2437                 (void) fprintf(stderr, gettext("internal error: "
2438                     "out of memory\n"));
2439                 return (1);
2440         }
2441
2442         /* check options */
2443         while ((c = getopt(argc, argv, "ro:")) != -1) {
2444                 switch (c) {
2445                 case 'o':
2446                         if (parseprop(props))
2447                                 return (1);
2448                         break;
2449                 case 'r':
2450                         recursive = B_TRUE;
2451                         break;
2452                 case '?':
2453                         (void) fprintf(stderr, gettext("invalid option '%c'\n"),
2454                             optopt);
2455                         goto usage;
2456                 }
2457         }
2458
2459         argc -= optind;
2460         argv += optind;
2461
2462         /* check number of arguments */
2463         if (argc < 1) {
2464                 (void) fprintf(stderr, gettext("missing snapshot argument\n"));
2465                 goto usage;
2466         }
2467         if (argc > 1) {
2468                 (void) fprintf(stderr, gettext("too many arguments\n"));
2469                 goto usage;
2470         }
2471
2472         ret = zfs_snapshot(g_zfs, argv[0], recursive, props);
2473         nvlist_free(props);
2474         if (ret && recursive)
2475                 (void) fprintf(stderr, gettext("no snapshots were created\n"));
2476         return (ret != 0);
2477
2478 usage:
2479         nvlist_free(props);
2480         usage(B_FALSE);
2481         return (-1);
2482 }
2483
2484 /*
2485  * zfs send [-v] -R [-i|-I <@snap>] <fs@snap>
2486  * zfs send [-v] [-i|-I <@snap>] <fs@snap>
2487  *
2488  * Send a backup stream to stdout.
2489  */
2490 static int
2491 zfs_do_send(int argc, char **argv)
2492 {
2493         char *fromname = NULL;
2494         char *toname = NULL;
2495         char *cp;
2496         zfs_handle_t *zhp;
2497         boolean_t doall = B_FALSE;
2498         boolean_t replicate = B_FALSE;
2499         boolean_t fromorigin = B_FALSE;
2500         boolean_t verbose = B_FALSE;
2501         int c, err;
2502
2503         /* check options */
2504         while ((c = getopt(argc, argv, ":i:I:Rv")) != -1) {
2505                 switch (c) {
2506                 case 'i':
2507                         if (fromname)
2508                                 usage(B_FALSE);
2509                         fromname = optarg;
2510                         break;
2511                 case 'I':
2512                         if (fromname)
2513                                 usage(B_FALSE);
2514                         fromname = optarg;
2515                         doall = B_TRUE;
2516                         break;
2517                 case 'R':
2518                         replicate = B_TRUE;
2519                         break;
2520                 case 'v':
2521                         verbose = B_TRUE;
2522                         break;
2523                 case ':':
2524                         (void) fprintf(stderr, gettext("missing argument for "
2525                             "'%c' option\n"), optopt);
2526                         usage(B_FALSE);
2527                         break;
2528                 case '?':
2529                         (void) fprintf(stderr, gettext("invalid option '%c'\n"),
2530                             optopt);
2531                         usage(B_FALSE);
2532                 }
2533         }
2534
2535         argc -= optind;
2536         argv += optind;
2537
2538         /* check number of arguments */
2539         if (argc < 1) {
2540                 (void) fprintf(stderr, gettext("missing snapshot argument\n"));
2541                 usage(B_FALSE);
2542         }
2543         if (argc > 1) {
2544                 (void) fprintf(stderr, gettext("too many arguments\n"));
2545                 usage(B_FALSE);
2546         }
2547
2548         if (isatty(STDOUT_FILENO)) {
2549                 (void) fprintf(stderr,
2550                     gettext("Error: Stream can not be written to a terminal.\n"
2551                     "You must redirect standard output.\n"));
2552                 return (1);
2553         }
2554
2555         cp = strchr(argv[0], '@');
2556         if (cp == NULL) {
2557                 (void) fprintf(stderr,
2558                     gettext("argument must be a snapshot\n"));
2559                 usage(B_FALSE);
2560         }
2561         *cp = '\0';
2562         toname = cp + 1;
2563         zhp = zfs_open(g_zfs, argv[0], ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME);
2564         if (zhp == NULL)
2565                 return (1);
2566
2567         /*
2568          * If they specified the full path to the snapshot, chop off
2569          * everything except the short name of the snapshot, but special
2570          * case if they specify the origin.
2571          */
2572         if (fromname && (cp = strchr(fromname, '@')) != NULL) {
2573                 char origin[ZFS_MAXNAMELEN];
2574                 zprop_source_t src;
2575
2576                 (void) zfs_prop_get(zhp, ZFS_PROP_ORIGIN,
2577                     origin, sizeof (origin), &src, NULL, 0, B_FALSE);
2578
2579                 if (strcmp(origin, fromname) == 0) {
2580                         fromname = NULL;
2581                         fromorigin = B_TRUE;
2582                 } else {
2583                         *cp = '\0';
2584                         if (cp != fromname && strcmp(argv[0], fromname)) {
2585                                 (void) fprintf(stderr,
2586                                     gettext("incremental source must be "
2587                                     "in same filesystem\n"));
2588                                 usage(B_FALSE);
2589                         }
2590                         fromname = cp + 1;
2591                         if (strchr(fromname, '@') || strchr(fromname, '/')) {
2592                                 (void) fprintf(stderr,
2593                                     gettext("invalid incremental source\n"));
2594                                 usage(B_FALSE);
2595                         }
2596                 }
2597         }
2598
2599         if (replicate && fromname == NULL)
2600                 doall = B_TRUE;
2601
2602         err = zfs_send(zhp, fromname, toname, replicate, doall, fromorigin,
2603             verbose, STDOUT_FILENO);
2604         zfs_close(zhp);
2605
2606         return (err != 0);
2607 }
2608
2609 /*
2610  * zfs receive [-dnvF] <fs@snap>
2611  *
2612  * Restore a backup stream from stdin.
2613  */
2614 static int
2615 zfs_do_receive(int argc, char **argv)
2616 {
2617         int c, err;
2618         recvflags_t flags;
2619
2620         bzero(&flags, sizeof (recvflags_t));
2621         /* check options */
2622         while ((c = getopt(argc, argv, ":dnuvF")) != -1) {
2623                 switch (c) {
2624                 case 'd':
2625                         flags.isprefix = B_TRUE;
2626                         break;
2627                 case 'n':
2628                         flags.dryrun = B_TRUE;
2629                         break;
2630                 case 'u':
2631                         flags.nomount = B_TRUE;
2632                         break;
2633                 case 'v':
2634                         flags.verbose = B_TRUE;
2635                         break;
2636                 case 'F':
2637                         flags.force = B_TRUE;
2638                         break;
2639                 case ':':
2640                         (void) fprintf(stderr, gettext("missing argument for "
2641                             "'%c' option\n"), optopt);
2642                         usage(B_FALSE);
2643                         break;
2644                 case '?':
2645                         (void) fprintf(stderr, gettext("invalid option '%c'\n"),
2646                             optopt);
2647                         usage(B_FALSE);
2648                 }
2649         }
2650
2651         argc -= optind;
2652         argv += optind;
2653
2654         /* check number of arguments */
2655         if (argc < 1) {
2656                 (void) fprintf(stderr, gettext("missing snapshot argument\n"));
2657                 usage(B_FALSE);
2658         }
2659         if (argc > 1) {
2660                 (void) fprintf(stderr, gettext("too many arguments\n"));
2661                 usage(B_FALSE);
2662         }
2663
2664         if (isatty(STDIN_FILENO)) {
2665                 (void) fprintf(stderr,
2666                     gettext("Error: Backup stream can not be read "
2667                     "from a terminal.\n"
2668                     "You must redirect standard input.\n"));
2669                 return (1);
2670         }
2671
2672         err = zfs_receive(g_zfs, argv[0], flags, STDIN_FILENO, NULL);
2673
2674         return (err != 0);
2675 }
2676
2677 static int
2678 zfs_do_hold_rele_impl(int argc, char **argv, boolean_t holding)
2679 {
2680         int errors = 0;
2681         int i;
2682         const char *tag;
2683         boolean_t recursive = B_FALSE;
2684         int c;
2685         int (*func)(zfs_handle_t *, const char *, const char *, boolean_t);
2686
2687         /* check options */
2688         while ((c = getopt(argc, argv, "r")) != -1) {
2689                 switch (c) {
2690                 case 'r':
2691                         recursive = B_TRUE;
2692                         break;
2693                 case '?':
2694                         (void) fprintf(stderr, gettext("invalid option '%c'\n"),
2695                             optopt);
2696                         usage(B_FALSE);
2697                 }
2698         }
2699
2700         argc -= optind;
2701         argv += optind;
2702
2703         /* check number of arguments */
2704         if (argc < 2)
2705                 usage(B_FALSE);
2706
2707         tag = argv[0];
2708         --argc;
2709         ++argv;
2710
2711         if (holding) {
2712                 if (tag[0] == '.') {
2713                         /* tags starting with '.' are reserved for libzfs */
2714                         (void) fprintf(stderr,
2715                             gettext("tag may not start with '.'\n"));
2716                         usage(B_FALSE);
2717                 }
2718                 func = zfs_hold;
2719         } else {
2720                 func = zfs_release;
2721         }
2722
2723         for (i = 0; i < argc; ++i) {
2724                 zfs_handle_t *zhp;
2725                 char parent[ZFS_MAXNAMELEN];
2726                 const char *delim;
2727                 char *path = argv[i];
2728
2729                 delim = strchr(path, '@');
2730                 if (delim == NULL) {
2731                         (void) fprintf(stderr,
2732                             gettext("'%s' is not a snapshot\n"), path);
2733                         ++errors;
2734                         continue;
2735                 }
2736                 (void) strncpy(parent, path, delim - path);
2737                 parent[delim - path] = '\0';
2738
2739                 zhp = zfs_open(g_zfs, parent,
2740                     ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME);
2741                 if (zhp == NULL) {
2742                         ++errors;
2743                         continue;
2744                 }
2745                 if (func(zhp, delim+1, tag, recursive) != 0)
2746                         ++errors;
2747                 zfs_close(zhp);
2748         }
2749
2750         return (errors != 0);
2751 }
2752
2753 /*
2754  * zfs hold [-r] <tag> <snap> ...
2755  *
2756  *      -r      Recursively hold
2757  *
2758  * Apply a user-hold with the given tag to the list of snapshots.
2759  */
2760 static int
2761 zfs_do_hold(int argc, char **argv)
2762 {
2763         return (zfs_do_hold_rele_impl(argc, argv, B_TRUE));
2764 }
2765
2766 /*
2767  * zfs release [-r] <tag> <snap> ...
2768  *
2769  *      -r      Recursively release
2770  *
2771  * Release a user-hold with the given tag from the list of snapshots.
2772  */
2773 static int
2774 zfs_do_release(int argc, char **argv)
2775 {
2776         return (zfs_do_hold_rele_impl(argc, argv, B_FALSE));
2777 }
2778
2779 typedef struct get_all_cbdata {
2780         zfs_handle_t    **cb_handles;
2781         size_t          cb_alloc;
2782         size_t          cb_used;
2783         uint_t          cb_types;
2784         boolean_t       cb_verbose;
2785 } get_all_cbdata_t;
2786
2787 #define CHECK_SPINNER 30
2788 #define SPINNER_TIME 3          /* seconds */
2789 #define MOUNT_TIME 5            /* seconds */
2790
2791 static int
2792 get_one_dataset(zfs_handle_t *zhp, void *data)
2793 {
2794         static char spin[] = { '-', '\\', '|', '/' };
2795         static int spinval = 0;
2796         static int spincheck = 0;
2797         static time_t last_spin_time = (time_t)0;
2798         get_all_cbdata_t *cbp = data;
2799         zfs_type_t type = zfs_get_type(zhp);
2800
2801         if (cbp->cb_verbose) {
2802                 if (--spincheck < 0) {
2803                         time_t now = time(NULL);
2804                         if (last_spin_time + SPINNER_TIME < now) {
2805                                 (void) printf("\b%c", spin[spinval++ % 4]);
2806                                 (void) fflush(stdout);
2807                                 last_spin_time = now;
2808                         }
2809                         spincheck = CHECK_SPINNER;
2810                 }
2811         }
2812
2813         /*
2814          * Interate over any nested datasets.
2815          */
2816         if (type == ZFS_TYPE_FILESYSTEM &&
2817             zfs_iter_filesystems(zhp, get_one_dataset, data) != 0) {
2818                 zfs_close(zhp);
2819                 return (1);
2820         }
2821
2822         /*
2823          * Skip any datasets whose type does not match.
2824          */
2825         if ((type & cbp->cb_types) == 0) {
2826                 zfs_close(zhp);
2827                 return (0);
2828         }
2829
2830         if (cbp->cb_alloc == cbp->cb_used) {
2831                 zfs_handle_t **handles;
2832
2833                 if (cbp->cb_alloc == 0)
2834                         cbp->cb_alloc = 64;
2835                 else
2836                         cbp->cb_alloc *= 2;
2837
2838                 handles = safe_malloc(cbp->cb_alloc * sizeof (void *));
2839
2840                 if (cbp->cb_handles) {
2841                         bcopy(cbp->cb_handles, handles,
2842                             cbp->cb_used * sizeof (void *));
2843                         free(cbp->cb_handles);
2844                 }
2845
2846                 cbp->cb_handles = handles;
2847         }
2848
2849         cbp->cb_handles[cbp->cb_used++] = zhp;
2850
2851         return (0);
2852 }
2853
2854 static void
2855 get_all_datasets(uint_t types, zfs_handle_t ***dslist, size_t *count,
2856     boolean_t verbose)
2857 {
2858         get_all_cbdata_t cb = { 0 };
2859         cb.cb_types = types;
2860         cb.cb_verbose = verbose;
2861
2862         if (verbose) {
2863                 (void) printf("%s: *", gettext("Reading ZFS config"));
2864                 (void) fflush(stdout);
2865         }
2866
2867         (void) zfs_iter_root(g_zfs, get_one_dataset, &cb);
2868
2869         *dslist = cb.cb_handles;
2870         *count = cb.cb_used;
2871
2872         if (verbose) {
2873                 (void) printf("\b%s\n", gettext("done."));
2874         }
2875 }
2876
2877 static int
2878 dataset_cmp(const void *a, const void *b)
2879 {
2880         zfs_handle_t **za = (zfs_handle_t **)a;
2881         zfs_handle_t **zb = (zfs_handle_t **)b;
2882         char mounta[MAXPATHLEN];
2883         char mountb[MAXPATHLEN];
2884         boolean_t gota, gotb;
2885
2886         if ((gota = (zfs_get_type(*za) == ZFS_TYPE_FILESYSTEM)) != 0)
2887                 verify(zfs_prop_get(*za, ZFS_PROP_MOUNTPOINT, mounta,
2888                     sizeof (mounta), NULL, NULL, 0, B_FALSE) == 0);
2889         if ((gotb = (zfs_get_type(*zb) == ZFS_TYPE_FILESYSTEM)) != 0)
2890                 verify(zfs_prop_get(*zb, ZFS_PROP_MOUNTPOINT, mountb,
2891                     sizeof (mountb), NULL, NULL, 0, B_FALSE) == 0);
2892
2893         if (gota && gotb)
2894                 return (strcmp(mounta, mountb));
2895
2896         if (gota)
2897                 return (-1);
2898         if (gotb)
2899                 return (1);
2900
2901         return (strcmp(zfs_get_name(a), zfs_get_name(b)));
2902 }
2903
2904 /*
2905  * Generic callback for sharing or mounting filesystems.  Because the code is so
2906  * similar, we have a common function with an extra parameter to determine which
2907  * mode we are using.
2908  */
2909 #define OP_SHARE        0x1
2910 #define OP_MOUNT        0x2
2911
2912 /*
2913  * Share or mount a dataset.
2914  */
2915 static int
2916 share_mount_one(zfs_handle_t *zhp, int op, int flags, char *protocol,
2917     boolean_t explicit, const char *options)
2918 {
2919         char mountpoint[ZFS_MAXPROPLEN];
2920         char shareopts[ZFS_MAXPROPLEN];
2921         char smbshareopts[ZFS_MAXPROPLEN];
2922         const char *cmdname = op == OP_SHARE ? "share" : "mount";
2923         struct mnttab mnt;
2924         uint64_t zoned, canmount;
2925         zfs_type_t type = zfs_get_type(zhp);
2926         boolean_t shared_nfs, shared_smb;
2927
2928         assert(type & (ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME));
2929
2930         if (type == ZFS_TYPE_FILESYSTEM) {
2931                 /*
2932                  * Check to make sure we can mount/share this dataset.  If we
2933                  * are in the global zone and the filesystem is exported to a
2934                  * local zone, or if we are in a local zone and the
2935                  * filesystem is not exported, then it is an error.
2936                  */
2937                 zoned = zfs_prop_get_int(zhp, ZFS_PROP_ZONED);
2938
2939                 if (zoned && getzoneid() == GLOBAL_ZONEID) {
2940                         if (!explicit)
2941                                 return (0);
2942
2943                         (void) fprintf(stderr, gettext("cannot %s '%s': "
2944                             "dataset is exported to a local zone\n"), cmdname,
2945                             zfs_get_name(zhp));
2946                         return (1);
2947
2948                 } else if (!zoned && getzoneid() != GLOBAL_ZONEID) {
2949                         if (!explicit)
2950                                 return (0);
2951
2952                         (void) fprintf(stderr, gettext("cannot %s '%s': "
2953                             "permission denied\n"), cmdname,
2954                             zfs_get_name(zhp));
2955                         return (1);
2956                 }
2957
2958                 /*
2959                  * Ignore any filesystems which don't apply to us. This
2960                  * includes those with a legacy mountpoint, or those with
2961                  * legacy share options.
2962                  */
2963                 verify(zfs_prop_get(zhp, ZFS_PROP_MOUNTPOINT, mountpoint,
2964                     sizeof (mountpoint), NULL, NULL, 0, B_FALSE) == 0);
2965                 verify(zfs_prop_get(zhp, ZFS_PROP_SHARENFS, shareopts,
2966                     sizeof (shareopts), NULL, NULL, 0, B_FALSE) == 0);
2967                 verify(zfs_prop_get(zhp, ZFS_PROP_SHARESMB, smbshareopts,
2968                     sizeof (smbshareopts), NULL, NULL, 0, B_FALSE) == 0);
2969
2970                 if (op == OP_SHARE && strcmp(shareopts, "off") == 0 &&
2971                     strcmp(smbshareopts, "off") == 0) {
2972                         if (!explicit)
2973                                 return (0);
2974
2975                         (void) fprintf(stderr, gettext("cannot share '%s': "
2976                             "legacy share\n"), zfs_get_name(zhp));
2977                         (void) fprintf(stderr, gettext("use share(1M) to "
2978                             "share this filesystem, or set "
2979                             "sharenfs property on\n"));
2980                         return (1);
2981                 }
2982
2983                 /*
2984                  * We cannot share or mount legacy filesystems. If the
2985                  * shareopts is non-legacy but the mountpoint is legacy, we
2986                  * treat it as a legacy share.
2987                  */
2988                 if (strcmp(mountpoint, "legacy") == 0) {
2989                         if (!explicit)
2990                                 return (0);
2991
2992                         (void) fprintf(stderr, gettext("cannot %s '%s': "
2993                             "legacy mountpoint\n"), cmdname, zfs_get_name(zhp));
2994                         (void) fprintf(stderr, gettext("use %s(1M) to "
2995                             "%s this filesystem\n"), cmdname, cmdname);
2996                         return (1);
2997                 }
2998
2999                 if (strcmp(mountpoint, "none") == 0) {
3000                         if (!explicit)
3001                                 return (0);
3002
3003                         (void) fprintf(stderr, gettext("cannot %s '%s': no "
3004                             "mountpoint set\n"), cmdname, zfs_get_name(zhp));
3005                         return (1);
3006                 }
3007
3008                 /*
3009                  * canmount     explicit        outcome
3010                  * on           no              pass through
3011                  * on           yes             pass through
3012                  * off          no              return 0
3013                  * off          yes             display error, return 1
3014                  * noauto       no              return 0
3015                  * noauto       yes             pass through
3016                  */
3017                 canmount = zfs_prop_get_int(zhp, ZFS_PROP_CANMOUNT);
3018                 if (canmount == ZFS_CANMOUNT_OFF) {
3019                         if (!explicit)
3020                                 return (0);
3021
3022                         (void) fprintf(stderr, gettext("cannot %s '%s': "
3023                             "'canmount' property is set to 'off'\n"), cmdname,
3024                             zfs_get_name(zhp));
3025                         return (1);
3026                 } else if (canmount == ZFS_CANMOUNT_NOAUTO && !explicit) {
3027                         return (0);
3028                 }
3029
3030                 /*
3031                  * At this point, we have verified that the mountpoint and/or
3032                  * shareopts are appropriate for auto management. If the
3033                  * filesystem is already mounted or shared, return (failing
3034                  * for explicit requests); otherwise mount or share the
3035                  * filesystem.
3036                  */
3037                 switch (op) {
3038                 case OP_SHARE:
3039
3040                         shared_nfs = zfs_is_shared_nfs(zhp, NULL);
3041                         shared_smb = zfs_is_shared_smb(zhp, NULL);
3042
3043                         if (shared_nfs && shared_smb ||
3044                             (shared_nfs && strcmp(shareopts, "on") == 0 &&
3045                             strcmp(smbshareopts, "off") == 0) ||
3046                             (shared_smb && strcmp(smbshareopts, "on") == 0 &&
3047                             strcmp(shareopts, "off") == 0)) {
3048                                 if (!explicit)
3049                                         return (0);
3050
3051                                 (void) fprintf(stderr, gettext("cannot share "
3052                                     "'%s': filesystem already shared\n"),
3053                                     zfs_get_name(zhp));
3054                                 return (1);
3055                         }
3056
3057                         if (!zfs_is_mounted(zhp, NULL) &&
3058                             zfs_mount(zhp, NULL, 0) != 0)
3059                                 return (1);
3060
3061                         if (protocol == NULL) {
3062                                 if (zfs_shareall(zhp) != 0)
3063                                         return (1);
3064                         } else if (strcmp(protocol, "nfs") == 0) {
3065                                 if (zfs_share_nfs(zhp))
3066                                         return (1);
3067                         } else if (strcmp(protocol, "smb") == 0) {
3068                                 if (zfs_share_smb(zhp))
3069                                         return (1);
3070                         } else {
3071                                 (void) fprintf(stderr, gettext("cannot share "
3072                                     "'%s': invalid share type '%s' "
3073                                     "specified\n"),
3074                                     zfs_get_name(zhp), protocol);
3075                                 return (1);
3076                         }
3077
3078                         break;
3079
3080                 case OP_MOUNT:
3081                         if (options == NULL)
3082                                 mnt.mnt_mntopts = "";
3083                         else
3084                                 mnt.mnt_mntopts = (char *)options;
3085
3086                         if (!hasmntopt(&mnt, MNTOPT_REMOUNT) &&
3087                             zfs_is_mounted(zhp, NULL)) {
3088                                 if (!explicit)
3089                                         return (0);
3090
3091                                 (void) fprintf(stderr, gettext("cannot mount "
3092                                     "'%s': filesystem already mounted\n"),
3093                                     zfs_get_name(zhp));
3094                                 return (1);
3095                         }
3096
3097                         if (zfs_mount(zhp, options, flags) != 0)
3098                                 return (1);
3099                         break;
3100                 }
3101         } else {
3102                 assert(op == OP_SHARE);
3103
3104                 /*
3105                  * Ignore any volumes that aren't shared.
3106                  */
3107                 verify(zfs_prop_get(zhp, ZFS_PROP_SHAREISCSI, shareopts,
3108                     sizeof (shareopts), NULL, NULL, 0, B_FALSE) == 0);
3109
3110                 if (strcmp(shareopts, "off") == 0) {
3111                         if (!explicit)
3112                                 return (0);
3113
3114                         (void) fprintf(stderr, gettext("cannot share '%s': "
3115                             "'shareiscsi' property not set\n"),
3116                             zfs_get_name(zhp));
3117                         (void) fprintf(stderr, gettext("set 'shareiscsi' "
3118                             "property or use iscsitadm(1M) to share this "
3119                             "volume\n"));
3120                         return (1);
3121                 }
3122
3123                 if (zfs_is_shared_iscsi(zhp)) {
3124                         if (!explicit)
3125                                 return (0);
3126
3127                         (void) fprintf(stderr, gettext("cannot share "
3128                             "'%s': volume already shared\n"),
3129                             zfs_get_name(zhp));
3130                         return (1);
3131                 }
3132
3133                 if (zfs_share_iscsi(zhp) != 0)
3134                         return (1);
3135         }
3136
3137         return (0);
3138 }
3139
3140 /*
3141  * Reports progress in the form "(current/total)".  Not thread-safe.
3142  */
3143 static void
3144 report_mount_progress(int current, int total)
3145 {
3146         static int len;
3147         static char *reverse = "\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b"
3148             "\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b";
3149         static time_t last_progress_time;
3150         time_t now = time(NULL);
3151
3152         /* report 1..n instead of 0..n-1 */
3153         ++current;
3154
3155         /* display header if we're here for the first time */
3156         if (current == 1) {
3157                 (void) printf(gettext("Mounting ZFS filesystems: "));
3158                 len = 0;
3159         } else if (current != total && last_progress_time + MOUNT_TIME >= now) {
3160                 /* too soon to report again */
3161                 return;
3162         }
3163
3164         last_progress_time = now;
3165
3166         /* back up to prepare for overwriting */
3167         if (len)
3168                 (void) printf("%*.*s", len, len, reverse);
3169
3170         /* We put a newline at the end if this is the last one.  */
3171         len = printf("(%d/%d)%s", current, total, current == total ? "\n" : "");
3172         (void) fflush(stdout);
3173 }
3174
3175 static void
3176 append_options(char *mntopts, char *newopts)
3177 {
3178         int len = strlen(mntopts);
3179
3180         /* original length plus new string to append plus 1 for the comma */
3181         if (len + 1 + strlen(newopts) >= MNT_LINE_MAX) {
3182                 (void) fprintf(stderr, gettext("the opts argument for "
3183                     "'%c' option is too long (more than %d chars)\n"),
3184                     "-o", MNT_LINE_MAX);
3185                 usage(B_FALSE);
3186         }
3187
3188         if (*mntopts)
3189                 mntopts[len++] = ',';
3190
3191         (void) strcpy(&mntopts[len], newopts);
3192 }
3193
3194 static int
3195 share_mount(int op, int argc, char **argv)
3196 {
3197         int do_all = 0;
3198         boolean_t verbose = B_FALSE;
3199         int c, ret = 0;
3200         char *options = NULL;
3201         int types, flags = 0;
3202
3203         /* check options */
3204         while ((c = getopt(argc, argv, op == OP_MOUNT ? ":avo:O" : "a"))
3205             != -1) {
3206                 switch (c) {
3207                 case 'a':
3208                         do_all = 1;
3209                         break;
3210                 case 'v':
3211                         verbose = B_TRUE;
3212                         break;
3213                 case 'o':
3214                         if (*optarg == '\0') {
3215                                 (void) fprintf(stderr, gettext("empty mount "
3216                                     "options (-o) specified\n"));
3217                                 usage(B_FALSE);
3218                         }
3219
3220                         if (options == NULL)
3221                                 options = safe_malloc(MNT_LINE_MAX + 1);
3222
3223                         /* option validation is done later */
3224                         append_options(options, optarg);
3225                         break;
3226
3227                 case 'O':
3228                         flags |= MS_OVERLAY;
3229                         break;
3230                 case ':':
3231                         (void) fprintf(stderr, gettext("missing argument for "
3232                             "'%c' option\n"), optopt);
3233                         usage(B_FALSE);
3234                         break;
3235                 case '?':
3236                         (void) fprintf(stderr, gettext("invalid option '%c'\n"),
3237                             optopt);
3238                         usage(B_FALSE);
3239                 }
3240         }
3241
3242         argc -= optind;
3243         argv += optind;
3244
3245         /* check number of arguments */
3246         if (do_all) {
3247                 zfs_handle_t **dslist = NULL;
3248                 size_t i, count = 0;
3249                 char *protocol = NULL;
3250
3251                 if (op == OP_MOUNT) {
3252                         types = ZFS_TYPE_FILESYSTEM;
3253                 } else if (argc > 0) {
3254                         if (strcmp(argv[0], "nfs") == 0 ||
3255                             strcmp(argv[0], "smb") == 0) {
3256                                 types = ZFS_TYPE_FILESYSTEM;
3257                         } else if (strcmp(argv[0], "iscsi") == 0) {
3258                                 types = ZFS_TYPE_VOLUME;
3259                         } else {
3260                                 (void) fprintf(stderr, gettext("share type "
3261                                     "must be 'nfs', 'smb' or 'iscsi'\n"));
3262                                 usage(B_FALSE);
3263                         }
3264                         protocol = argv[0];
3265                         argc--;
3266                         argv++;
3267                 } else {
3268                         types = ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME;
3269                 }
3270
3271                 if (argc != 0) {
3272                         (void) fprintf(stderr, gettext("too many arguments\n"));
3273                         usage(B_FALSE);
3274                 }
3275
3276                 get_all_datasets(types, &dslist, &count, verbose);
3277
3278                 if (count == 0)
3279                         return (0);
3280
3281                 qsort(dslist, count, sizeof (void *), dataset_cmp);
3282
3283                 for (i = 0; i < count; i++) {
3284                         if (verbose)
3285                                 report_mount_progress(i, count);
3286
3287                         if (share_mount_one(dslist[i], op, flags, protocol,
3288                             B_FALSE, options) != 0)
3289                                 ret = 1;
3290                         zfs_close(dslist[i]);
3291                 }
3292
3293                 free(dslist);
3294         } else if (argc == 0) {
3295                 struct mnttab entry;
3296
3297                 if ((op == OP_SHARE) || (options != NULL)) {
3298                         (void) fprintf(stderr, gettext("missing filesystem "
3299                             "argument (specify -a for all)\n"));
3300                         usage(B_FALSE);
3301                 }
3302
3303                 /*
3304                  * When mount is given no arguments, go through /etc/mnttab and
3305                  * display any active ZFS mounts.  We hide any snapshots, since
3306                  * they are controlled automatically.
3307                  */
3308                 rewind(mnttab_file);
3309                 while (getmntent(mnttab_file, &entry) == 0) {
3310                         if (strcmp(entry.mnt_fstype, MNTTYPE_ZFS) != 0 ||
3311                             strchr(entry.mnt_special, '@') != NULL)
3312                                 continue;
3313
3314                         (void) printf("%-30s  %s\n", entry.mnt_special,
3315                             entry.mnt_mountp);
3316                 }
3317
3318         } else {
3319                 zfs_handle_t *zhp;
3320
3321                 types = ZFS_TYPE_FILESYSTEM;
3322                 if (op == OP_SHARE)
3323                         types |= ZFS_TYPE_VOLUME;
3324
3325                 if (argc > 1) {
3326                         (void) fprintf(stderr,
3327                             gettext("too many arguments\n"));
3328                         usage(B_FALSE);
3329                 }
3330
3331                 if ((zhp = zfs_open(g_zfs, argv[0], types)) == NULL) {
3332                         ret = 1;
3333                 } else {
3334                         ret = share_mount_one(zhp, op, flags, NULL, B_TRUE,
3335                             options);
3336                         zfs_close(zhp);
3337                 }
3338         }
3339
3340         return (ret);
3341 }
3342
3343 /*
3344  * zfs mount -a [nfs | iscsi]
3345  * zfs mount filesystem
3346  *
3347  * Mount all filesystems, or mount the given filesystem.
3348  */
3349 static int
3350 zfs_do_mount(int argc, char **argv)
3351 {
3352         return (share_mount(OP_MOUNT, argc, argv));
3353 }
3354
3355 /*
3356  * zfs share -a [nfs | iscsi | smb]
3357  * zfs share filesystem
3358  *
3359  * Share all filesystems, or share the given filesystem.
3360  */
3361 static int
3362 zfs_do_share(int argc, char **argv)
3363 {
3364         return (share_mount(OP_SHARE, argc, argv));
3365 }
3366
3367 typedef struct unshare_unmount_node {
3368         zfs_handle_t    *un_zhp;
3369         char            *un_mountp;
3370         uu_avl_node_t   un_avlnode;
3371 } unshare_unmount_node_t;
3372
3373 /* ARGSUSED */
3374 static int
3375 unshare_unmount_compare(const void *larg, const void *rarg, void *unused)
3376 {
3377         const unshare_unmount_node_t *l = larg;
3378         const unshare_unmount_node_t *r = rarg;
3379
3380         return (strcmp(l->un_mountp, r->un_mountp));
3381 }
3382
3383 /*
3384  * Convenience routine used by zfs_do_umount() and manual_unmount().  Given an
3385  * absolute path, find the entry /etc/mnttab, verify that its a ZFS filesystem,
3386  * and unmount it appropriately.
3387  */
3388 static int
3389 unshare_unmount_path(int op, char *path, int flags, boolean_t is_manual)
3390 {
3391         zfs_handle_t *zhp;
3392         int ret;
3393         struct stat64 statbuf;
3394         struct extmnttab entry;
3395         const char *cmdname = (op == OP_SHARE) ? "unshare" : "unmount";
3396         ino_t path_inode;
3397
3398         /*
3399          * Search for the path in /etc/mnttab.  Rather than looking for the
3400          * specific path, which can be fooled by non-standard paths (i.e. ".."
3401          * or "//"), we stat() the path and search for the corresponding
3402          * (major,minor) device pair.
3403          */
3404         if (stat64(path, &statbuf) != 0) {
3405                 (void) fprintf(stderr, gettext("cannot %s '%s': %s\n"),
3406                     cmdname, path, strerror(errno));
3407                 return (1);
3408         }
3409         path_inode = statbuf.st_ino;
3410
3411         /*
3412          * Search for the given (major,minor) pair in the mount table.
3413          */
3414         rewind(mnttab_file);
3415         while ((ret = getextmntent(mnttab_file, &entry, 0)) == 0) {
3416                 if (entry.mnt_major == major(statbuf.st_dev) &&
3417                     entry.mnt_minor == minor(statbuf.st_dev))
3418                         break;
3419         }
3420         if (ret != 0) {
3421                 if (op == OP_SHARE) {
3422                         (void) fprintf(stderr, gettext("cannot %s '%s': not "
3423                             "currently mounted\n"), cmdname, path);
3424                         return (1);
3425                 }
3426                 (void) fprintf(stderr, gettext("warning: %s not in mnttab\n"),
3427                     path);
3428                 if ((ret = umount2(path, flags)) != 0)
3429                         (void) fprintf(stderr, gettext("%s: %s\n"), path,
3430                             strerror(errno));
3431                 return (ret != 0);
3432         }
3433
3434         if (strcmp(entry.mnt_fstype, MNTTYPE_ZFS) != 0) {
3435                 (void) fprintf(stderr, gettext("cannot %s '%s': not a ZFS "
3436                     "filesystem\n"), cmdname, path);
3437                 return (1);
3438         }
3439
3440         if ((zhp = zfs_open(g_zfs, entry.mnt_special,
3441             ZFS_TYPE_FILESYSTEM)) == NULL)
3442                 return (1);
3443
3444         ret = 1;
3445         if (stat64(entry.mnt_mountp, &statbuf) != 0) {
3446                 (void) fprintf(stderr, gettext("cannot %s '%s': %s\n"),
3447                     cmdname, path, strerror(errno));
3448                 goto out;
3449         } else if (statbuf.st_ino != path_inode) {
3450                 (void) fprintf(stderr, gettext("cannot "
3451                     "%s '%s': not a mountpoint\n"), cmdname, path);
3452                 goto out;
3453         }
3454
3455         if (op == OP_SHARE) {
3456                 char nfs_mnt_prop[ZFS_MAXPROPLEN];
3457                 char smbshare_prop[ZFS_MAXPROPLEN];
3458
3459                 verify(zfs_prop_get(zhp, ZFS_PROP_SHARENFS, nfs_mnt_prop,
3460                     sizeof (nfs_mnt_prop), NULL, NULL, 0, B_FALSE) == 0);
3461                 verify(zfs_prop_get(zhp, ZFS_PROP_SHARESMB, smbshare_prop,
3462                     sizeof (smbshare_prop), NULL, NULL, 0, B_FALSE) == 0);
3463
3464                 if (strcmp(nfs_mnt_prop, "off") == 0 &&
3465                     strcmp(smbshare_prop, "off") == 0) {
3466                         (void) fprintf(stderr, gettext("cannot unshare "
3467                             "'%s': legacy share\n"), path);
3468                         (void) fprintf(stderr, gettext("use "
3469                             "unshare(1M) to unshare this filesystem\n"));
3470                 } else if (!zfs_is_shared(zhp)) {
3471                         (void) fprintf(stderr, gettext("cannot unshare '%s': "
3472                             "not currently shared\n"), path);
3473                 } else {
3474                         ret = zfs_unshareall_bypath(zhp, path);
3475                 }
3476         } else {
3477                 char mtpt_prop[ZFS_MAXPROPLEN];
3478
3479                 verify(zfs_prop_get(zhp, ZFS_PROP_MOUNTPOINT, mtpt_prop,
3480                     sizeof (mtpt_prop), NULL, NULL, 0, B_FALSE) == 0);
3481
3482                 if (is_manual) {
3483                         ret = zfs_unmount(zhp, NULL, flags);
3484                 } else if (strcmp(mtpt_prop, "legacy") == 0) {
3485                         (void) fprintf(stderr, gettext("cannot unmount "
3486                             "'%s': legacy mountpoint\n"),
3487                             zfs_get_name(zhp));
3488                         (void) fprintf(stderr, gettext("use umount(1M) "
3489                             "to unmount this filesystem\n"));
3490                 } else {
3491                         ret = zfs_unmountall(zhp, flags);
3492                 }
3493         }
3494
3495 out:
3496         zfs_close(zhp);
3497
3498         return (ret != 0);
3499 }
3500
3501 /*
3502  * Generic callback for unsharing or unmounting a filesystem.
3503  */
3504 static int
3505 unshare_unmount(int op, int argc, char **argv)
3506 {
3507         int do_all = 0;
3508         int flags = 0;
3509         int ret = 0;
3510         int types, c;
3511         zfs_handle_t *zhp;
3512         char nfsiscsi_mnt_prop[ZFS_MAXPROPLEN];
3513         char sharesmb[ZFS_MAXPROPLEN];
3514
3515         /* check options */
3516         while ((c = getopt(argc, argv, op == OP_SHARE ? "a" : "af")) != -1) {
3517                 switch (c) {
3518                 case 'a':
3519                         do_all = 1;
3520                         break;
3521                 case 'f':
3522                         flags = MS_FORCE;
3523                         break;
3524                 case '?':
3525                         (void) fprintf(stderr, gettext("invalid option '%c'\n"),
3526                             optopt);
3527                         usage(B_FALSE);
3528                 }
3529         }
3530
3531         argc -= optind;
3532         argv += optind;
3533
3534         if (do_all) {
3535                 /*
3536                  * We could make use of zfs_for_each() to walk all datasets in
3537                  * the system, but this would be very inefficient, especially
3538                  * since we would have to linearly search /etc/mnttab for each
3539                  * one.  Instead, do one pass through /etc/mnttab looking for
3540                  * zfs entries and call zfs_unmount() for each one.
3541                  *
3542                  * Things get a little tricky if the administrator has created
3543                  * mountpoints beneath other ZFS filesystems.  In this case, we
3544                  * have to unmount the deepest filesystems first.  To accomplish
3545                  * this, we place all the mountpoints in an AVL tree sorted by
3546                  * the special type (dataset name), and walk the result in
3547                  * reverse to make sure to get any snapshots first.
3548                  */
3549                 struct mnttab entry;
3550                 uu_avl_pool_t *pool;
3551                 uu_avl_t *tree;
3552                 unshare_unmount_node_t *node;
3553                 uu_avl_index_t idx;
3554                 uu_avl_walk_t *walk;
3555
3556                 if (argc != 0) {
3557                         (void) fprintf(stderr, gettext("too many arguments\n"));
3558                         usage(B_FALSE);
3559                 }
3560
3561                 if ((pool = uu_avl_pool_create("unmount_pool",
3562                     sizeof (unshare_unmount_node_t),
3563                     offsetof(unshare_unmount_node_t, un_avlnode),
3564                     unshare_unmount_compare,
3565                     UU_DEFAULT)) == NULL) {
3566                         (void) fprintf(stderr, gettext("internal error: "
3567                             "out of memory\n"));
3568                         exit(1);
3569                 }
3570
3571                 if ((tree = uu_avl_create(pool, NULL, UU_DEFAULT)) == NULL) {
3572                         (void) fprintf(stderr, gettext("internal error: "
3573                             "out of memory\n"));
3574                         exit(1);
3575                 }
3576
3577                 rewind(mnttab_file);
3578                 while (getmntent(mnttab_file, &entry) == 0) {
3579
3580                         /* ignore non-ZFS entries */
3581                         if (strcmp(entry.mnt_fstype, MNTTYPE_ZFS) != 0)
3582                                 continue;
3583
3584                         /* ignore snapshots */
3585                         if (strchr(entry.mnt_special, '@') != NULL)
3586                                 continue;
3587
3588                         if ((zhp = zfs_open(g_zfs, entry.mnt_special,
3589                             ZFS_TYPE_FILESYSTEM)) == NULL) {
3590                                 ret = 1;
3591                                 continue;
3592                         }
3593
3594                         switch (op) {
3595                         case OP_SHARE:
3596                                 verify(zfs_prop_get(zhp, ZFS_PROP_SHARENFS,
3597                                     nfsiscsi_mnt_prop,
3598                                     sizeof (nfsiscsi_mnt_prop),
3599                                     NULL, NULL, 0, B_FALSE) == 0);
3600                                 if (strcmp(nfsiscsi_mnt_prop, "off") != 0)
3601                                         break;
3602                                 verify(zfs_prop_get(zhp, ZFS_PROP_SHARESMB,
3603                                     nfsiscsi_mnt_prop,
3604                                     sizeof (nfsiscsi_mnt_prop),
3605                                     NULL, NULL, 0, B_FALSE) == 0);
3606                                 if (strcmp(nfsiscsi_mnt_prop, "off") == 0)
3607                                         continue;
3608                                 break;
3609                         case OP_MOUNT:
3610                                 /* Ignore legacy mounts */
3611                                 verify(zfs_prop_get(zhp, ZFS_PROP_MOUNTPOINT,
3612                                     nfsiscsi_mnt_prop,
3613                                     sizeof (nfsiscsi_mnt_prop),
3614                                     NULL, NULL, 0, B_FALSE) == 0);
3615                                 if (strcmp(nfsiscsi_mnt_prop, "legacy") == 0)
3616                                         continue;
3617                                 /* Ignore canmount=noauto mounts */
3618                                 if (zfs_prop_get_int(zhp, ZFS_PROP_CANMOUNT) ==
3619                                     ZFS_CANMOUNT_NOAUTO)
3620                                         continue;
3621                         default:
3622                                 break;
3623                         }
3624
3625                         node = safe_malloc(sizeof (unshare_unmount_node_t));
3626                         node->un_zhp = zhp;
3627
3628                         if ((node->un_mountp = strdup(entry.mnt_mountp)) ==
3629                             NULL) {
3630                                 (void) fprintf(stderr, gettext("internal error:"
3631                                     " out of memory\n"));
3632                                 exit(1);
3633                         }
3634
3635                         uu_avl_node_init(node, &node->un_avlnode, pool);
3636
3637                         if (uu_avl_find(tree, node, NULL, &idx) == NULL) {
3638                                 uu_avl_insert(tree, node, idx);
3639                         } else {
3640                                 zfs_close(node->un_zhp);
3641                                 free(node->un_mountp);
3642                                 free(node);
3643                         }
3644                 }
3645
3646                 /*
3647                  * Walk the AVL tree in reverse, unmounting each filesystem and
3648                  * removing it from the AVL tree in the process.
3649                  */
3650                 if ((walk = uu_avl_walk_start(tree,
3651                     UU_WALK_REVERSE | UU_WALK_ROBUST)) == NULL) {
3652                         (void) fprintf(stderr,
3653                             gettext("internal error: out of memory"));
3654                         exit(1);
3655                 }
3656
3657                 while ((node = uu_avl_walk_next(walk)) != NULL) {
3658                         uu_avl_remove(tree, node);
3659
3660                         switch (op) {
3661                         case OP_SHARE:
3662                                 if (zfs_unshareall_bypath(node->un_zhp,
3663                                     node->un_mountp) != 0)
3664                                         ret = 1;
3665                                 break;
3666
3667                         case OP_MOUNT:
3668                                 if (zfs_unmount(node->un_zhp,
3669                                     node->un_mountp, flags) != 0)
3670                                         ret = 1;
3671                                 break;
3672                         }
3673
3674                         zfs_close(node->un_zhp);
3675                         free(node->un_mountp);
3676                         free(node);
3677                 }
3678
3679                 uu_avl_walk_end(walk);
3680                 uu_avl_destroy(tree);
3681                 uu_avl_pool_destroy(pool);
3682
3683                 if (op == OP_SHARE) {
3684                         /*
3685                          * Finally, unshare any volumes shared via iSCSI.
3686                          */
3687                         zfs_handle_t **dslist = NULL;
3688                         size_t i, count = 0;
3689
3690                         get_all_datasets(ZFS_TYPE_VOLUME, &dslist, &count,
3691                             B_FALSE);
3692
3693                         if (count != 0) {
3694                                 qsort(dslist, count, sizeof (void *),
3695                                     dataset_cmp);
3696
3697                                 for (i = 0; i < count; i++) {
3698                                         if (zfs_unshare_iscsi(dslist[i]) != 0)
3699                                                 ret = 1;
3700                                         zfs_close(dslist[i]);
3701                                 }
3702
3703                                 free(dslist);
3704                         }
3705                 }
3706         } else {
3707                 if (argc != 1) {
3708                         if (argc == 0)
3709                                 (void) fprintf(stderr,
3710                                     gettext("missing filesystem argument\n"));
3711                         else
3712                                 (void) fprintf(stderr,
3713                                     gettext("too many arguments\n"));
3714                         usage(B_FALSE);
3715                 }
3716
3717                 /*
3718                  * We have an argument, but it may be a full path or a ZFS
3719                  * filesystem.  Pass full paths off to unmount_path() (shared by
3720                  * manual_unmount), otherwise open the filesystem and pass to
3721                  * zfs_unmount().
3722                  */
3723                 if (argv[0][0] == '/')
3724                         return (unshare_unmount_path(op, argv[0],
3725                             flags, B_FALSE));
3726
3727                 types = ZFS_TYPE_FILESYSTEM;
3728                 if (op == OP_SHARE)
3729                         types |= ZFS_TYPE_VOLUME;
3730
3731                 if ((zhp = zfs_open(g_zfs, argv[0], types)) == NULL)
3732                         return (1);
3733
3734                 if (zfs_get_type(zhp) == ZFS_TYPE_FILESYSTEM) {
3735                         verify(zfs_prop_get(zhp, op == OP_SHARE ?
3736                             ZFS_PROP_SHARENFS : ZFS_PROP_MOUNTPOINT,
3737                             nfsiscsi_mnt_prop, sizeof (nfsiscsi_mnt_prop), NULL,
3738                             NULL, 0, B_FALSE) == 0);
3739
3740                         switch (op) {
3741                         case OP_SHARE:
3742                                 verify(zfs_prop_get(zhp, ZFS_PROP_SHARENFS,
3743                                     nfsiscsi_mnt_prop,
3744                                     sizeof (nfsiscsi_mnt_prop),
3745                                     NULL, NULL, 0, B_FALSE) == 0);
3746                                 verify(zfs_prop_get(zhp, ZFS_PROP_SHARESMB,
3747                                     sharesmb, sizeof (sharesmb), NULL, NULL,
3748                                     0, B_FALSE) == 0);
3749
3750                                 if (strcmp(nfsiscsi_mnt_prop, "off") == 0 &&
3751                                     strcmp(sharesmb, "off") == 0) {
3752                                         (void) fprintf(stderr, gettext("cannot "
3753                                             "unshare '%s': legacy share\n"),
3754                                             zfs_get_name(zhp));
3755                                         (void) fprintf(stderr, gettext("use "
3756                                             "unshare(1M) to unshare this "
3757                                             "filesystem\n"));
3758                                         ret = 1;
3759                                 } else if (!zfs_is_shared(zhp)) {
3760                                         (void) fprintf(stderr, gettext("cannot "
3761                                             "unshare '%s': not currently "
3762                                             "shared\n"), zfs_get_name(zhp));
3763                                         ret = 1;
3764                                 } else if (zfs_unshareall(zhp) != 0) {
3765                                         ret = 1;
3766                                 }
3767                                 break;
3768
3769                         case OP_MOUNT:
3770                                 if (strcmp(nfsiscsi_mnt_prop, "legacy") == 0) {
3771                                         (void) fprintf(stderr, gettext("cannot "
3772                                             "unmount '%s': legacy "
3773                                             "mountpoint\n"), zfs_get_name(zhp));
3774                                         (void) fprintf(stderr, gettext("use "
3775                                             "umount(1M) to unmount this "
3776                                             "filesystem\n"));
3777                                         ret = 1;
3778                                 } else if (!zfs_is_mounted(zhp, NULL)) {
3779                                         (void) fprintf(stderr, gettext("cannot "
3780                                             "unmount '%s': not currently "
3781                                             "mounted\n"),
3782                                             zfs_get_name(zhp));
3783                                         ret = 1;
3784                                 } else if (zfs_unmountall(zhp, flags) != 0) {
3785                                         ret = 1;
3786                                 }
3787                                 break;
3788                         }
3789                 } else {
3790                         assert(op == OP_SHARE);
3791
3792                         verify(zfs_prop_get(zhp, ZFS_PROP_SHAREISCSI,
3793                             nfsiscsi_mnt_prop, sizeof (nfsiscsi_mnt_prop),
3794                             NULL, NULL, 0, B_FALSE) == 0);
3795
3796                         if (strcmp(nfsiscsi_mnt_prop, "off") == 0) {
3797                                 (void) fprintf(stderr, gettext("cannot unshare "
3798                                     "'%s': 'shareiscsi' property not set\n"),
3799                                     zfs_get_name(zhp));
3800                                 (void) fprintf(stderr, gettext("set "
3801                                     "'shareiscsi' property or use "
3802                                     "iscsitadm(1M) to share this volume\n"));
3803                                 ret = 1;
3804                         } else if (!zfs_is_shared_iscsi(zhp)) {
3805                                 (void) fprintf(stderr, gettext("cannot "
3806                                     "unshare '%s': not currently shared\n"),
3807                                     zfs_get_name(zhp));
3808                                 ret = 1;
3809                         } else if (zfs_unshare_iscsi(zhp) != 0) {
3810                                 ret = 1;
3811                         }
3812                 }
3813
3814                 zfs_close(zhp);
3815         }
3816
3817         return (ret);
3818 }
3819
3820 /*
3821  * zfs unmount -a
3822  * zfs unmount filesystem
3823  *
3824  * Unmount all filesystems, or a specific ZFS filesystem.
3825  */
3826 static int
3827 zfs_do_unmount(int argc, char **argv)
3828 {
3829         return (unshare_unmount(OP_MOUNT, argc, argv));
3830 }
3831
3832 /*
3833  * zfs unshare -a
3834  * zfs unshare filesystem
3835  *
3836  * Unshare all filesystems, or a specific ZFS filesystem.
3837  */
3838 static int
3839 zfs_do_unshare(int argc, char **argv)
3840 {
3841         return (unshare_unmount(OP_SHARE, argc, argv));
3842 }
3843
3844 /* ARGSUSED */
3845 static int
3846 zfs_do_python(int argc, char **argv)
3847 {
3848         (void) execv(pypath, argv-1);
3849         (void) printf("internal error: %s not found\n", pypath);
3850         return (-1);
3851 }
3852
3853 /*
3854  * Called when invoked as /etc/fs/zfs/mount.  Do the mount if the mountpoint is
3855  * 'legacy'.  Otherwise, complain that use should be using 'zfs mount'.
3856  */
3857 static int
3858 manual_mount(int argc, char **argv)
3859 {
3860         zfs_handle_t *zhp;
3861         char mountpoint[ZFS_MAXPROPLEN];
3862         char mntopts[MNT_LINE_MAX] = { '\0' };
3863         int ret;
3864         int c;
3865         int flags = 0;
3866         char *dataset, *path;
3867
3868         /* check options */
3869         while ((c = getopt(argc, argv, ":mo:O")) != -1) {
3870                 switch (c) {
3871                 case 'o':
3872                         (void) strlcpy(mntopts, optarg, sizeof (mntopts));
3873                         break;
3874                 case 'O':
3875                         flags |= MS_OVERLAY;
3876                         break;
3877                 case 'm':
3878                         flags |= MS_NOMNTTAB;
3879                         break;
3880                 case ':':
3881                         (void) fprintf(stderr, gettext("missing argument for "
3882                             "'%c' option\n"), optopt);
3883                         usage(B_FALSE);
3884                         break;
3885                 case '?':
3886                         (void) fprintf(stderr, gettext("invalid option '%c'\n"),
3887                             optopt);
3888                         (void) fprintf(stderr, gettext("usage: mount [-o opts] "
3889                             "<path>\n"));
3890                         return (2);
3891                 }
3892         }
3893
3894         argc -= optind;
3895         argv += optind;
3896
3897         /* check that we only have two arguments */
3898         if (argc != 2) {
3899                 if (argc == 0)
3900                         (void) fprintf(stderr, gettext("missing dataset "
3901                             "argument\n"));
3902                 else if (argc == 1)
3903                         (void) fprintf(stderr,
3904                             gettext("missing mountpoint argument\n"));
3905                 else
3906                         (void) fprintf(stderr, gettext("too many arguments\n"));
3907                 (void) fprintf(stderr, "usage: mount <dataset> <mountpoint>\n");
3908                 return (2);
3909         }
3910
3911         dataset = argv[0];
3912         path = argv[1];
3913
3914         /* try to open the dataset */
3915         if ((zhp = zfs_open(g_zfs, dataset, ZFS_TYPE_FILESYSTEM)) == NULL)
3916                 return (1);
3917
3918         (void) zfs_prop_get(zhp, ZFS_PROP_MOUNTPOINT, mountpoint,
3919             sizeof (mountpoint), NULL, NULL, 0, B_FALSE);
3920
3921         /* check for legacy mountpoint and complain appropriately */
3922         ret = 0;
3923         if (strcmp(mountpoint, ZFS_MOUNTPOINT_LEGACY) == 0) {
3924                 if (mount(dataset, path, MS_OPTIONSTR | flags, MNTTYPE_ZFS,
3925                     NULL, 0, mntopts, sizeof (mntopts)) != 0) {
3926                         (void) fprintf(stderr, gettext("mount failed: %s\n"),
3927                             strerror(errno));
3928                         ret = 1;
3929                 }
3930         } else {
3931                 (void) fprintf(stderr, gettext("filesystem '%s' cannot be "
3932                     "mounted using 'mount -F zfs'\n"), dataset);
3933                 (void) fprintf(stderr, gettext("Use 'zfs set mountpoint=%s' "
3934                     "instead.\n"), path);
3935                 (void) fprintf(stderr, gettext("If you must use 'mount -F zfs' "
3936                     "or /etc/vfstab, use 'zfs set mountpoint=legacy'.\n"));
3937                 (void) fprintf(stderr, gettext("See zfs(1M) for more "
3938                     "information.\n"));
3939                 ret = 1;
3940         }
3941
3942         return (ret);
3943 }
3944
3945 /*
3946  * Called when invoked as /etc/fs/zfs/umount.  Unlike a manual mount, we allow
3947  * unmounts of non-legacy filesystems, as this is the dominant administrative
3948  * interface.
3949  */
3950 static int
3951 manual_unmount(int argc, char **argv)
3952 {
3953         int flags = 0;
3954         int c;
3955
3956         /* check options */
3957         while ((c = getopt(argc, argv, "f")) != -1) {
3958                 switch (c) {
3959                 case 'f':
3960                         flags = MS_FORCE;
3961                         break;
3962                 case '?':
3963                         (void) fprintf(stderr, gettext("invalid option '%c'\n"),
3964                             optopt);
3965                         (void) fprintf(stderr, gettext("usage: unmount [-f] "
3966                             "<path>\n"));
3967                         return (2);
3968                 }
3969         }
3970
3971         argc -= optind;
3972         argv += optind;
3973
3974         /* check arguments */
3975         if (argc != 1) {
3976                 if (argc == 0)
3977                         (void) fprintf(stderr, gettext("missing path "
3978                             "argument\n"));
3979                 else
3980                         (void) fprintf(stderr, gettext("too many arguments\n"));
3981                 (void) fprintf(stderr, gettext("usage: unmount [-f] <path>\n"));
3982                 return (2);
3983         }
3984
3985         return (unshare_unmount_path(OP_MOUNT, argv[0], flags, B_TRUE));
3986 }
3987
3988 static int
3989 volcheck(zpool_handle_t *zhp, void *data)
3990 {
3991         boolean_t isinit = *((boolean_t *)data);
3992
3993         if (isinit)
3994                 return (zpool_create_zvol_links(zhp));
3995         else
3996                 return (zpool_remove_zvol_links(zhp));
3997 }
3998
3999 /*
4000  * Iterate over all pools in the system and either create or destroy /dev/zvol
4001  * links, depending on the value of 'isinit'.
4002  */
4003 static int
4004 do_volcheck(boolean_t isinit)
4005 {
4006         return (zpool_iter(g_zfs, volcheck, &isinit) ? 1 : 0);
4007 }
4008
4009 static int
4010 find_command_idx(char *command, int *idx)
4011 {
4012         int i;
4013
4014         for (i = 0; i < NCOMMAND; i++) {
4015                 if (command_table[i].name == NULL)
4016                         continue;
4017
4018                 if (strcmp(command, command_table[i].name) == 0) {
4019                         *idx = i;
4020                         return (0);
4021                 }
4022         }
4023         return (1);
4024 }
4025
4026 int
4027 main(int argc, char **argv)
4028 {
4029         int ret;
4030         int i;
4031         char *progname;
4032         char *cmdname;
4033
4034         (void) setlocale(LC_ALL, "");
4035         (void) textdomain(TEXT_DOMAIN);
4036
4037         opterr = 0;
4038
4039         if ((g_zfs = libzfs_init()) == NULL) {
4040                 (void) fprintf(stderr, gettext("internal error: failed to "
4041                     "initialize ZFS library\n"));
4042                 return (1);
4043         }
4044
4045         zpool_set_history_str("zfs", argc, argv, history_str);
4046         verify(zpool_stage_history(g_zfs, history_str) == 0);
4047
4048         libzfs_print_on_error(g_zfs, B_TRUE);
4049
4050         if ((mnttab_file = fopen(MNTTAB, "r")) == NULL) {
4051                 (void) fprintf(stderr, gettext("internal error: unable to "
4052                     "open %s\n"), MNTTAB);
4053                 return (1);
4054         }
4055
4056         /*
4057          * This command also doubles as the /etc/fs mount and unmount program.
4058          * Determine if we should take this behavior based on argv[0].
4059          */
4060         progname = basename(argv[0]);
4061         if (strcmp(progname, "mount") == 0) {
4062                 ret = manual_mount(argc, argv);
4063         } else if (strcmp(progname, "umount") == 0) {
4064                 ret = manual_unmount(argc, argv);
4065         } else {
4066                 /*
4067                  * Make sure the user has specified some command.
4068                  */
4069                 if (argc < 2) {
4070                         (void) fprintf(stderr, gettext("missing command\n"));
4071                         usage(B_FALSE);
4072                 }
4073
4074                 cmdname = argv[1];
4075
4076                 /*
4077                  * The 'umount' command is an alias for 'unmount'
4078                  */
4079                 if (strcmp(cmdname, "umount") == 0)
4080                         cmdname = "unmount";
4081
4082                 /*
4083                  * The 'recv' command is an alias for 'receive'
4084                  */
4085                 if (strcmp(cmdname, "recv") == 0)
4086                         cmdname = "receive";
4087
4088                 /*
4089                  * Special case '-?'
4090                  */
4091                 if (strcmp(cmdname, "-?") == 0)
4092                         usage(B_TRUE);
4093
4094                 /*
4095                  * 'volinit' and 'volfini' do not appear in the usage message,
4096                  * so we have to special case them here.
4097                  */
4098                 if (strcmp(cmdname, "volinit") == 0)
4099                         return (do_volcheck(B_TRUE));
4100                 else if (strcmp(cmdname, "volfini") == 0)
4101                         return (do_volcheck(B_FALSE));
4102
4103                 /*
4104                  * Run the appropriate command.
4105                  */
4106                 libzfs_mnttab_cache(g_zfs, B_TRUE);
4107                 if (find_command_idx(cmdname, &i) == 0) {
4108                         current_command = &command_table[i];
4109                         ret = command_table[i].func(argc - 1, argv + 1);
4110                 } else if (strchr(cmdname, '=') != NULL) {
4111                         verify(find_command_idx("set", &i) == 0);
4112                         current_command = &command_table[i];
4113                         ret = command_table[i].func(argc, argv);
4114                 } else {
4115                         (void) fprintf(stderr, gettext("unrecognized "
4116                             "command '%s'\n"), cmdname);
4117                         usage(B_FALSE);
4118                 }
4119                 libzfs_mnttab_cache(g_zfs, B_FALSE);
4120         }
4121
4122         (void) fclose(mnttab_file);
4123
4124         libzfs_fini(g_zfs);
4125
4126         /*
4127          * The 'ZFS_ABORT' environment variable causes us to dump core on exit
4128          * for the purposes of running ::findleaks.
4129          */
4130         if (getenv("ZFS_ABORT") != NULL) {
4131                 (void) printf("dumping core by request\n");
4132                 abort();
4133         }
4134
4135         return (ret);
4136 }