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