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 2008 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 <sys/mkdev.h>
  43 #include <sys/mntent.h>
  44 #include <sys/mnttab.h>
  45 #include <sys/mount.h>
  46 #include <sys/stat.h>
  47 #include <sys/avl.h>
  48
  49 #include <libzfs.h>
  50 #include <libuutil.h>
  51
  52 #include "zfs_iter.h"
  53 #include "zfs_util.h"
  54
  55 libzfs_handle_t *g_zfs;
  56
  57 static FILE *mnttab_file;
  58 static char history_str[HIS_MAX_RECORD_LEN];
  59
  60 static int zfs_do_clone(int argc, char **argv);
  61 static int zfs_do_create(int argc, char **argv);
  62 static int zfs_do_destroy(int argc, char **argv);
  63 static int zfs_do_get(int argc, char **argv);
  64 static int zfs_do_inherit(int argc, char **argv);
  65 static int zfs_do_list(int argc, char **argv);
  66 static int zfs_do_mount(int argc, char **argv);
  67 static int zfs_do_rename(int argc, char **argv);
  68 static int zfs_do_rollback(int argc, char **argv);
  69 static int zfs_do_set(int argc, char **argv);
  70 static int zfs_do_upgrade(int argc, char **argv);
  71 static int zfs_do_snapshot(int argc, char **argv);
  72 static int zfs_do_unmount(int argc, char **argv);
  73 static int zfs_do_share(int argc, char **argv);
  74 static int zfs_do_unshare(int argc, char **argv);
  75 static int zfs_do_send(int argc, char **argv);
  76 static int zfs_do_receive(int argc, char **argv);
  77 static int zfs_do_promote(int argc, char **argv);
  78 static int zfs_do_allow(int argc, char **argv);
  79 static int zfs_do_unallow(int argc, char **argv);
  80
  81 /*
  82  * Enable a reasonable set of defaults for libumem debugging on DEBUG builds.
  83  */
  84
  85 #ifdef DEBUG
  86 const char *
  87 _umem_debug_init(void)
  88 {
  89         return ("default,verbose"); /* $UMEM_DEBUG setting */
  90 }
  91
  92 const char *
  93 _umem_logging_init(void)
  94 {
  95         return ("fail,contents"); /* $UMEM_LOGGING setting */
  96 }
  97 #endif
  98
  99 typedef enum {
 100         HELP_CLONE,
 101         HELP_CREATE,
 102         HELP_DESTROY,
 103         HELP_GET,
 104         HELP_INHERIT,
 105         HELP_UPGRADE,
 106         HELP_LIST,
 107         HELP_MOUNT,
 108         HELP_PROMOTE,
 109         HELP_RECEIVE,
 110         HELP_RENAME,
 111         HELP_ROLLBACK,
 112         HELP_SEND,
 113         HELP_SET,
 114         HELP_SHARE,
 115         HELP_SNAPSHOT,
 116         HELP_UNMOUNT,
 117         HELP_UNSHARE,
 118         HELP_ALLOW,
 119         HELP_UNALLOW
 120 } zfs_help_t;
 121
 122 typedef struct zfs_command {
 123         const char      *name;
 124         int             (*func)(int argc, char **argv);
 125         zfs_help_t      usage;
 126 } zfs_command_t;
 127
 128 /*
 129  * Master command table.  Each ZFS command has a name, associated function, and
 130  * usage message.  The usage messages need to be internationalized, so we have
 131  * to have a function to return the usage message based on a command index.
 132  *
 133  * These commands are organized according to how they are displayed in the usage
 134  * message.  An empty command (one with a NULL name) indicates an empty line in
 135  * the generic usage message.
 136  */
 137 static zfs_command_t command_table[] = {
 138         { "create",     zfs_do_create,          HELP_CREATE             },
 139         { "destroy",    zfs_do_destroy,         HELP_DESTROY            },
 140         { NULL },
 141         { "snapshot",   zfs_do_snapshot,        HELP_SNAPSHOT           },
 142         { "rollback",   zfs_do_rollback,        HELP_ROLLBACK           },
 143         { "clone",      zfs_do_clone,           HELP_CLONE              },
 144         { "promote",    zfs_do_promote,         HELP_PROMOTE            },
 145         { "rename",     zfs_do_rename,          HELP_RENAME             },
 146         { NULL },
 147         { "list",       zfs_do_list,            HELP_LIST               },
 148         { NULL },
 149         { "set",        zfs_do_set,             HELP_SET                },
 150         { "get",        zfs_do_get,             HELP_GET                },
 151         { "inherit",    zfs_do_inherit,         HELP_INHERIT            },
 152         { "upgrade",    zfs_do_upgrade,         HELP_UPGRADE            },
 153         { NULL },
 154         { "mount",      zfs_do_mount,           HELP_MOUNT              },
 155         { "unmount",    zfs_do_unmount,         HELP_UNMOUNT            },
 156         { "share",      zfs_do_share,           HELP_SHARE              },
 157         { "unshare",    zfs_do_unshare,         HELP_UNSHARE            },
 158         { NULL },
 159         { "send",       zfs_do_send,            HELP_SEND               },
 160         { "receive",    zfs_do_receive,         HELP_RECEIVE            },
 161         { NULL },
 162         { "allow",      zfs_do_allow,           HELP_ALLOW              },
 163         { NULL },
 164         { "unallow",    zfs_do_unallow,         HELP_UNALLOW            },
 165 };
 166
 167 #define NCOMMAND        (sizeof (command_table) / sizeof (command_table[0]))
 168
 169 zfs_command_t *current_command;
 170
 171 static const char *
 172 get_usage(zfs_help_t idx)
 173 {
 174         switch (idx) {
 175         case HELP_CLONE:
 176                 return (gettext("\tclone [-p] [-o property=value] ... "
 177                     "<snapshot> <filesystem|volume>\n"));
 178         case HELP_CREATE:
 179                 return (gettext("\tcreate [-p] [-o property=value] ... "
 180                     "<filesystem>\n"
 181                     "\tcreate [-ps] [-b blocksize] [-o property=value] ... "
 182                     "-V <size> <volume>\n"));
 183         case HELP_DESTROY:
 184                 return (gettext("\tdestroy [-rRf] "
 185                     "<filesystem|volume|snapshot>\n"));
 186         case HELP_GET:
 187                 return (gettext("\tget [-rHp] [-o field[,...]] "
 188                     "[-s source[,...]]\n"
 189                     "\t    <\"all\" | property[,...]> "
 190                     "[filesystem|volume|snapshot] ...\n"));
 191         case HELP_INHERIT:
 192                 return (gettext("\tinherit [-r] <property> "
 193                     "<filesystem|volume|snapshot> ...\n"));
 194         case HELP_UPGRADE:
 195                 return (gettext("\tupgrade [-v]\n"
 196                     "\tupgrade [-r] [-V version] <-a | filesystem ...>\n"));
 197         case HELP_LIST:
 198                 return (gettext("\tlist [-rH] [-o property[,...]] "
 199                     "[-t type[,...]] [-s property] ...\n"
 200                     "\t    [-S property] ... "
 201                     "[filesystem|volume|snapshot] ...\n"));
 202         case HELP_MOUNT:
 203                 return (gettext("\tmount\n"
 204                     "\tmount [-vO] [-o opts] <-a | filesystem>\n"));
 205         case HELP_PROMOTE:
 206                 return (gettext("\tpromote <clone-filesystem>\n"));
 207         case HELP_RECEIVE:
 208                 return (gettext("\treceive [-vnF] <filesystem|volume|"
 209                 "snapshot>\n"
 210                 "\treceive [-vnF] -d <filesystem>\n"));
 211         case HELP_RENAME:
 212                 return (gettext("\trename <filesystem|volume|snapshot> "
 213                     "<filesystem|volume|snapshot>\n"
 214                     "\trename -p <filesystem|volume> <filesystem|volume>\n"
 215                     "\trename -r <snapshot> <snapshot>"));
 216         case HELP_ROLLBACK:
 217                 return (gettext("\trollback [-rRf] <snapshot>\n"));
 218         case HELP_SEND:
 219                 return (gettext("\tsend [-R] [-[iI] snapshot] <snapshot>\n"));
 220         case HELP_SET:
 221                 return (gettext("\tset <property=value> "
 222                     "<filesystem|volume|snapshot> ...\n"));
 223         case HELP_SHARE:
 224                 return (gettext("\tshare <-a | filesystem>\n"));
 225         case HELP_SNAPSHOT:
 226                 return (gettext("\tsnapshot [-r] [-o property=value] ... "
 227                     "<filesystem@snapname|volume@snapname>\n"));
 228         case HELP_UNMOUNT:
 229                 return (gettext("\tunmount [-f] "
 230                     "<-a | filesystem|mountpoint>\n"));
 231         case HELP_UNSHARE:
 232                 return (gettext("\tunshare [-f] "
 233                     "<-a | filesystem|mountpoint>\n"));
 234         case HELP_ALLOW:
 235                 return (gettext("\tallow [-ldug] "
 236                     "<\"everyone\"|user|group>[,...] <perm|@setname>[,...]\n"
 237                     "\t    <filesystem|volume>\n"
 238                     "\tallow [-ld] -e <perm|@setname>[,...] "
 239                     "<filesystem|volume>\n"
 240                     "\tallow -c <perm|@setname>[,...] <filesystem|volume>\n"
 241                     "\tallow -s @setname <perm|@setname>[,...] "
 242                     "<filesystem|volume>\n"));
 243         case HELP_UNALLOW:
 244                 return (gettext("\tunallow [-rldug] "
 245                     "<\"everyone\"|user|group>[,...]\n"
 246                     "\t    [<perm|@setname>[,...]] <filesystem|volume>\n"
 247                     "\tunallow [-rld] -e [<perm|@setname>[,...]] "
 248                     "<filesystem|volume>\n"
 249                     "\tunallow [-r] -c [<perm|@setname>[,...]] "
 250                     "<filesystem|volume>\n"
 251                     "\tunallow [-r] -s @setname [<perm|@setname>[,...]] "
 252                     "<filesystem|volume>\n"));
 253         }
 254
 255         abort();
 256         /* NOTREACHED */
 257 }
 258
 259 /*
 260  * Utility function to guarantee malloc() success.
 261  */
 262 void *
 263 safe_malloc(size_t size)
 264 {
 265         void *data;
 266
 267         if ((data = calloc(1, size)) == NULL) {
 268                 (void) fprintf(stderr, "internal error: out of memory\n");
 269                 exit(1);
 270         }
 271
 272         return (data);
 273 }
 274
 275 /*
 276  * Callback routine that will print out information for each of
 277  * the properties.
 278  */
 279 static int
 280 usage_prop_cb(int prop, void *cb)
 281 {
 282         FILE *fp = cb;
 283
 284         (void) fprintf(fp, "\t%-15s ", zfs_prop_to_name(prop));
 285
 286         if (zfs_prop_readonly(prop))
 287                 (void) fprintf(fp, " NO    ");
 288         else
 289                 (void) fprintf(fp, "YES    ");
 290
 291         if (zfs_prop_inheritable(prop))
 292                 (void) fprintf(fp, "  YES   ");
 293         else
 294                 (void) fprintf(fp, "   NO   ");
 295
 296         if (zfs_prop_values(prop) == NULL)
 297                 (void) fprintf(fp, "-\n");
 298         else
 299                 (void) fprintf(fp, "%s\n", zfs_prop_values(prop));
 300
 301         return (ZPROP_CONT);
 302 }
 303
 304 /*
 305  * Display usage message.  If we're inside a command, display only the usage for
 306  * that command.  Otherwise, iterate over the entire command table and display
 307  * a complete usage message.
 308  */
 309 static void
 310 usage(boolean_t requested)
 311 {
 312         int i;
 313         boolean_t show_properties = B_FALSE;
 314         boolean_t show_permissions = B_FALSE;
 315         FILE *fp = requested ? stdout : stderr;
 316
 317         if (current_command == NULL) {
 318
 319                 (void) fprintf(fp, gettext("usage: zfs command args ...\n"));
 320                 (void) fprintf(fp,
 321                     gettext("where 'command' is one of the following:\n\n"));
 322
 323                 for (i = 0; i < NCOMMAND; i++) {
 324                         if (command_table[i].name == NULL)
 325                                 (void) fprintf(fp, "\n");
 326                         else
 327                                 (void) fprintf(fp, "%s",
 328                                     get_usage(command_table[i].usage));
 329                 }
 330
 331                 (void) fprintf(fp, gettext("\nEach dataset is of the form: "
 332                     "pool/[dataset/]*dataset[@name]\n"));
 333         } else {
 334                 (void) fprintf(fp, gettext("usage:\n"));
 335                 (void) fprintf(fp, "%s", get_usage(current_command->usage));
 336         }
 337
 338         if (current_command != NULL &&
 339             (strcmp(current_command->name, "set") == 0 ||
 340             strcmp(current_command->name, "get") == 0 ||
 341             strcmp(current_command->name, "inherit") == 0 ||
 342             strcmp(current_command->name, "list") == 0))
 343                 show_properties = B_TRUE;
 344
 345         if (current_command != NULL &&
 346             (strcmp(current_command->name, "allow") == 0 ||
 347             strcmp(current_command->name, "unallow") == 0))
 348                 show_permissions = B_TRUE;
 349
 350         if (show_properties) {
 351
 352                 (void) fprintf(fp,
 353                     gettext("\nThe following properties are supported:\n"));
 354
 355                 (void) fprintf(fp, "\n\t%-14s %s  %s   %s\n\n",
 356                     "PROPERTY", "EDIT", "INHERIT", "VALUES");
 357
 358                 /* Iterate over all properties */
 359                 (void) zprop_iter(usage_prop_cb, fp, B_FALSE, B_TRUE,
 360                     ZFS_TYPE_DATASET);
 361
 362                 (void) fprintf(fp, gettext("\nSizes are specified in bytes "
 363                     "with standard units such as K, M, G, etc.\n"));
 364                 (void) fprintf(fp, gettext("\nUser-defined properties can "
 365                     "be specified by using a name containing a colon (:).\n"));
 366
 367         } else if (show_permissions) {
 368                 (void) fprintf(fp,
 369                     gettext("\nThe following permissions are supported:\n"));
 370
 371                 zfs_deleg_permissions();
 372         } else {
 373                 /*
 374                  * TRANSLATION NOTE:
 375                  * "zfs set|get" must not be localised this is the
 376                  * command name and arguments.
 377                  */
 378
 379                 (void) fprintf(fp,
 380                     gettext("\nFor the property list, run: zfs set|get\n"));
 381
 382                 (void) fprintf(fp,
 383                     gettext("\nFor the delegated permission list, run:"
 384                     " zfs allow|unallow\n"));
 385         }
 386
 387         /*
 388          * See comments at end of main().
 389          */
 390         if (getenv("ZFS_ABORT") != NULL) {
 391                 (void) printf("dumping core by request\n");
 392                 abort();
 393         }
 394
 395         exit(requested ? 0 : 2);
 396 }
 397
 398 static int
 399 parseprop(nvlist_t *props)
 400 {
 401         char *propname = optarg;
 402         char *propval, *strval;
 403
 404         if ((propval = strchr(propname, '=')) == NULL) {
 405                 (void) fprintf(stderr, gettext("missing "
 406                     "'=' for -o option\n"));
 407                 return (-1);
 408         }
 409         *propval = '\0';
 410         propval++;
 411         if (nvlist_lookup_string(props, propname, &strval) == 0) {
 412                 (void) fprintf(stderr, gettext("property '%s' "
 413                     "specified multiple times\n"), propname);
 414                 return (-1);
 415         }
 416         if (nvlist_add_string(props, propname, propval) != 0) {
 417                 (void) fprintf(stderr, gettext("internal "
 418                     "error: out of memory\n"));
 419                 return (-1);
 420         }
 421         return (0);
 422
 423 }
 424
 425 /*
 426  * zfs clone [-p] [-o prop=value] ... <snap> <fs | vol>
 427  *
 428  * Given an existing dataset, create a writable copy whose initial contents
 429  * are the same as the source.  The newly created dataset maintains a
 430  * dependency on the original; the original cannot be destroyed so long as
 431  * the clone exists.
 432  *
 433  * The '-p' flag creates all the non-existing ancestors of the target first.
 434  */
 435 static int
 436 zfs_do_clone(int argc, char **argv)
 437 {
 438         zfs_handle_t *zhp = NULL;
 439         boolean_t parents = B_FALSE;
 440         nvlist_t *props;
 441         int ret;
 442         int c;
 443
 444         if (nvlist_alloc(&props, NV_UNIQUE_NAME, 0) != 0) {
 445                 (void) fprintf(stderr, gettext("internal error: "
 446                     "out of memory\n"));
 447                 return (1);
 448         }
 449
 450         /* check options */
 451         while ((c = getopt(argc, argv, "o:p")) != -1) {
 452                 switch (c) {
 453                 case 'o':
 454                         if (parseprop(props))
 455                                 return (1);
 456                         break;
 457                 case 'p':
 458                         parents = B_TRUE;
 459                         break;
 460                 case '?':
 461                         (void) fprintf(stderr, gettext("invalid option '%c'\n"),
 462                             optopt);
 463                         goto usage;
 464                 }
 465         }
 466
 467         argc -= optind;
 468         argv += optind;
 469
 470         /* check number of arguments */
 471         if (argc < 1) {
 472                 (void) fprintf(stderr, gettext("missing source dataset "
 473                     "argument\n"));
 474                 goto usage;
 475         }
 476         if (argc < 2) {
 477                 (void) fprintf(stderr, gettext("missing target dataset "
 478                     "argument\n"));
 479                 goto usage;
 480         }
 481         if (argc > 2) {
 482                 (void) fprintf(stderr, gettext("too many arguments\n"));
 483                 goto usage;
 484         }
 485
 486         /* open the source dataset */
 487         if ((zhp = zfs_open(g_zfs, argv[0], ZFS_TYPE_SNAPSHOT)) == NULL)
 488                 return (1);
 489
 490         if (parents && zfs_name_valid(argv[1], ZFS_TYPE_FILESYSTEM |
 491             ZFS_TYPE_VOLUME)) {
 492                 /*
 493                  * Now create the ancestors of the target dataset.  If the
 494                  * target already exists and '-p' option was used we should not
 495                  * complain.
 496                  */
 497                 if (zfs_dataset_exists(g_zfs, argv[1], ZFS_TYPE_FILESYSTEM |
 498                     ZFS_TYPE_VOLUME))
 499                         return (0);
 500                 if (zfs_create_ancestors(g_zfs, argv[1]) != 0)
 501                         return (1);
 502         }
 503
 504         /* pass to libzfs */
 505         ret = zfs_clone(zhp, argv[1], props);
 506
 507         /* create the mountpoint if necessary */
 508         if (ret == 0) {
 509                 zfs_handle_t *clone;
 510
 511                 clone = zfs_open(g_zfs, argv[1], ZFS_TYPE_DATASET);
 512                 if (clone != NULL) {
 513                         if ((ret = zfs_mount(clone, NULL, 0)) == 0)
 514                                 ret = zfs_share(clone);
 515                         zfs_close(clone);
 516                 }
 517         }
 518
 519         zfs_close(zhp);
 520         nvlist_free(props);
 521
 522         return (!!ret);
 523
 524 usage:
 525         if (zhp)
 526                 zfs_close(zhp);
 527         nvlist_free(props);
 528         usage(B_FALSE);
 529         return (-1);
 530 }
 531
 532 /*
 533  * zfs create [-p] [-o prop=value] ... fs
 534  * zfs create [-ps] [-b blocksize] [-o prop=value] ... -V vol size
 535  *
 536  * Create a new dataset.  This command can be used to create filesystems
 537  * and volumes.  Snapshot creation is handled by 'zfs snapshot'.
 538  * For volumes, the user must specify a size to be used.
 539  *
 540  * The '-s' flag applies only to volumes, and indicates that we should not try
 541  * to set the reservation for this volume.  By default we set a reservation
 542  * equal to the size for any volume.  For pools with SPA_VERSION >=
 543  * SPA_VERSION_REFRESERVATION, we set a refreservation instead.
 544  *
 545  * The '-p' flag creates all the non-existing ancestors of the target first.
 546  */
 547 static int
 548 zfs_do_create(int argc, char **argv)
 549 {
 550         zfs_type_t type = ZFS_TYPE_FILESYSTEM;
 551         zfs_handle_t *zhp = NULL;
 552         uint64_t volsize;
 553         int c;
 554         boolean_t noreserve = B_FALSE;
 555         boolean_t bflag = B_FALSE;
 556         boolean_t parents = B_FALSE;
 557         int ret = 1;
 558         nvlist_t *props;
 559         uint64_t intval;
 560         int canmount;
 561
 562         if (nvlist_alloc(&props, NV_UNIQUE_NAME, 0) != 0) {
 563                 (void) fprintf(stderr, gettext("internal error: "
 564                     "out of memory\n"));
 565                 return (1);
 566         }
 567
 568         /* check options */
 569         while ((c = getopt(argc, argv, ":V:b:so:p")) != -1) {
 570                 switch (c) {
 571                 case 'V':
 572                         type = ZFS_TYPE_VOLUME;
 573                         if (zfs_nicestrtonum(g_zfs, optarg, &intval) != 0) {
 574                                 (void) fprintf(stderr, gettext("bad volume "
 575                                     "size '%s': %s\n"), optarg,
 576                                     libzfs_error_description(g_zfs));
 577                                 goto error;
 578                         }
 579
 580                         if (nvlist_add_uint64(props,
 581                             zfs_prop_to_name(ZFS_PROP_VOLSIZE),
 582                             intval) != 0) {
 583                                 (void) fprintf(stderr, gettext("internal "
 584                                     "error: out of memory\n"));
 585                                 goto error;
 586                         }
 587                         volsize = intval;
 588                         break;
 589                 case 'p':
 590                         parents = B_TRUE;
 591                         break;
 592                 case 'b':
 593                         bflag = B_TRUE;
 594                         if (zfs_nicestrtonum(g_zfs, optarg, &intval) != 0) {
 595                                 (void) fprintf(stderr, gettext("bad volume "
 596                                     "block size '%s': %s\n"), optarg,
 597                                     libzfs_error_description(g_zfs));
 598                                 goto error;
 599                         }
 600
 601                         if (nvlist_add_uint64(props,
 602                             zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE),
 603                             intval) != 0) {
 604                                 (void) fprintf(stderr, gettext("internal "
 605                                     "error: out of memory\n"));
 606                                 goto error;
 607                         }
 608                         break;
 609                 case 'o':
 610                         if (parseprop(props))
 611                                 goto error;
 612                         break;
 613                 case 's':
 614                         noreserve = B_TRUE;
 615                         break;
 616                 case ':':
 617                         (void) fprintf(stderr, gettext("missing size "
 618                             "argument\n"));
 619                         goto badusage;
 620                         break;
 621                 case '?':
 622                         (void) fprintf(stderr, gettext("invalid option '%c'\n"),
 623                             optopt);
 624                         goto badusage;
 625                 }
 626         }
 627
 628         if ((bflag || noreserve) && type != ZFS_TYPE_VOLUME) {
 629                 (void) fprintf(stderr, gettext("'-s' and '-b' can only be "
 630                     "used when creating a volume\n"));
 631                 goto badusage;
 632         }
 633
 634         argc -= optind;
 635         argv += optind;
 636
 637         /* check number of arguments */
 638         if (argc == 0) {
 639                 (void) fprintf(stderr, gettext("missing %s argument\n"),
 640                     zfs_type_to_name(type));
 641                 goto badusage;
 642         }
 643         if (argc > 1) {
 644                 (void) fprintf(stderr, gettext("too many arguments\n"));
 645                 goto badusage;
 646         }
 647
 648         if (type == ZFS_TYPE_VOLUME && !noreserve) {
 649                 zpool_handle_t *zpool_handle;
 650                 uint64_t spa_version;
 651                 char *p;
 652                 zfs_prop_t resv_prop;
 653                 char *strval;
 654
 655                 if (p = strchr(argv[0], '/'))
 656                         *p = '\0';
 657                 zpool_handle = zpool_open(g_zfs, argv[0]);
 658                 if (p != NULL)
 659                         *p = '/';
 660                 if (zpool_handle == NULL)
 661                         goto error;
 662                 spa_version = zpool_get_prop_int(zpool_handle,
 663                     ZPOOL_PROP_VERSION, NULL);
 664                 zpool_close(zpool_handle);
 665                 if (spa_version >= SPA_VERSION_REFRESERVATION)
 666                         resv_prop = ZFS_PROP_REFRESERVATION;
 667                 else
 668                         resv_prop = ZFS_PROP_RESERVATION;
 669
 670                 if (nvlist_lookup_string(props, zfs_prop_to_name(resv_prop),
 671                     &strval) != 0) {
 672                         if (nvlist_add_uint64(props,
 673                             zfs_prop_to_name(resv_prop), volsize) != 0) {
 674                                 (void) fprintf(stderr, gettext("internal "
 675                                     "error: out of memory\n"));
 676                                 nvlist_free(props);
 677                                 return (1);
 678                         }
 679                 }
 680         }
 681
 682         if (parents && zfs_name_valid(argv[0], type)) {
 683                 /*
 684                  * Now create the ancestors of target dataset.  If the target
 685                  * already exists and '-p' option was used we should not
 686                  * complain.
 687                  */
 688                 if (zfs_dataset_exists(g_zfs, argv[0], type)) {
 689                         ret = 0;
 690                         goto error;
 691                 }
 692                 if (zfs_create_ancestors(g_zfs, argv[0]) != 0)
 693                         goto error;
 694         }
 695
 696         /* pass to libzfs */
 697         if (zfs_create(g_zfs, argv[0], type, props) != 0)
 698                 goto error;
 699
 700         if ((zhp = zfs_open(g_zfs, argv[0], ZFS_TYPE_DATASET)) == NULL)
 701                 goto error;
 702         /*
 703          * if the user doesn't want the dataset automatically mounted,
 704          * then skip the mount/share step
 705          */
 706
 707         canmount = zfs_prop_get_int(zhp, ZFS_PROP_CANMOUNT);
 708
 709         /*
 710          * Mount and/or share the new filesystem as appropriate.  We provide a
 711          * verbose error message to let the user know that their filesystem was
 712          * in fact created, even if we failed to mount or share it.
 713          */
 714         ret = 0;
 715         if (canmount == ZFS_CANMOUNT_ON) {
 716                 if (zfs_mount(zhp, NULL, 0) != 0) {
 717                         (void) fprintf(stderr, gettext("filesystem "
 718                             "successfully created, but not mounted\n"));
 719                         ret = 1;
 720                 } else if (zfs_share(zhp) != 0) {
 721                         (void) fprintf(stderr, gettext("filesystem "
 722                             "successfully created, but not shared\n"));
 723                         ret = 1;
 724                 }
 725         }
 726
 727 error:
 728         if (zhp)
 729                 zfs_close(zhp);
 730         nvlist_free(props);
 731         return (ret);
 732 badusage:
 733         nvlist_free(props);
 734         usage(B_FALSE);
 735         return (2);
 736 }
 737
 738 /*
 739  * zfs destroy [-rf] <fs, snap, vol>
 740  *
 741  *      -r      Recursively destroy all children
 742  *      -R      Recursively destroy all dependents, including clones
 743  *      -f      Force unmounting of any dependents
 744  *
 745  * Destroys the given dataset.  By default, it will unmount any filesystems,
 746  * and refuse to destroy a dataset that has any dependents.  A dependent can
 747  * either be a child, or a clone of a child.
 748  */
 749 typedef struct destroy_cbdata {
 750         boolean_t       cb_first;
 751         int             cb_force;
 752         int             cb_recurse;
 753         int             cb_error;
 754         int             cb_needforce;
 755         int             cb_doclones;
 756         boolean_t       cb_closezhp;
 757         zfs_handle_t    *cb_target;
 758         char            *cb_snapname;
 759 } destroy_cbdata_t;
 760
 761 /*
 762  * Check for any dependents based on the '-r' or '-R' flags.
 763  */
 764 static int
 765 destroy_check_dependent(zfs_handle_t *zhp, void *data)
 766 {
 767         destroy_cbdata_t *cbp = data;
 768         const char *tname = zfs_get_name(cbp->cb_target);
 769         const char *name = zfs_get_name(zhp);
 770
 771         if (strncmp(tname, name, strlen(tname)) == 0 &&
 772             (name[strlen(tname)] == '/' || name[strlen(tname)] == '@')) {
 773                 /*
 774                  * This is a direct descendant, not a clone somewhere else in
 775                  * the hierarchy.
 776                  */
 777                 if (cbp->cb_recurse)
 778                         goto out;
 779
 780                 if (cbp->cb_first) {
 781                         (void) fprintf(stderr, gettext("cannot destroy '%s': "
 782                             "%s has children\n"),
 783                             zfs_get_name(cbp->cb_target),
 784                             zfs_type_to_name(zfs_get_type(cbp->cb_target)));
 785                         (void) fprintf(stderr, gettext("use '-r' to destroy "
 786                             "the following datasets:\n"));
 787                         cbp->cb_first = B_FALSE;
 788                         cbp->cb_error = 1;
 789                 }
 790
 791                 (void) fprintf(stderr, "%s\n", zfs_get_name(zhp));
 792         } else {
 793                 /*
 794                  * This is a clone.  We only want to report this if the '-r'
 795                  * wasn't specified, or the target is a snapshot.
 796                  */
 797                 if (!cbp->cb_recurse &&
 798                     zfs_get_type(cbp->cb_target) != ZFS_TYPE_SNAPSHOT)
 799                         goto out;
 800
 801                 if (cbp->cb_first) {
 802                         (void) fprintf(stderr, gettext("cannot destroy '%s': "
 803                             "%s has dependent clones\n"),
 804                             zfs_get_name(cbp->cb_target),
 805                             zfs_type_to_name(zfs_get_type(cbp->cb_target)));
 806                         (void) fprintf(stderr, gettext("use '-R' to destroy "
 807                             "the following datasets:\n"));
 808                         cbp->cb_first = B_FALSE;
 809                         cbp->cb_error = 1;
 810                 }
 811
 812                 (void) fprintf(stderr, "%s\n", zfs_get_name(zhp));
 813         }
 814
 815 out:
 816         zfs_close(zhp);
 817         return (0);
 818 }
 819
 820 static int
 821 destroy_callback(zfs_handle_t *zhp, void *data)
 822 {
 823         destroy_cbdata_t *cbp = data;
 824
 825         /*
 826          * Ignore pools (which we've already flagged as an error before getting
 827          * here.
 828          */
 829         if (strchr(zfs_get_name(zhp), '/') == NULL &&
 830             zfs_get_type(zhp) == ZFS_TYPE_FILESYSTEM) {
 831                 zfs_close(zhp);
 832                 return (0);
 833         }
 834
 835         /*
 836          * Bail out on the first error.
 837          */
 838         if (zfs_unmount(zhp, NULL, cbp->cb_force ? MS_FORCE : 0) != 0 ||
 839             zfs_destroy(zhp) != 0) {
 840                 zfs_close(zhp);
 841                 return (-1);
 842         }
 843
 844         zfs_close(zhp);
 845         return (0);
 846 }
 847
 848 static int
 849 destroy_snap_clones(zfs_handle_t *zhp, void *arg)
 850 {
 851         destroy_cbdata_t *cbp = arg;
 852         char thissnap[MAXPATHLEN];
 853         zfs_handle_t *szhp;
 854         boolean_t closezhp = cbp->cb_closezhp;
 855         int rv;
 856
 857         (void) snprintf(thissnap, sizeof (thissnap),
 858             "%s@%s", zfs_get_name(zhp), cbp->cb_snapname);
 859
 860         libzfs_print_on_error(g_zfs, B_FALSE);
 861         szhp = zfs_open(g_zfs, thissnap, ZFS_TYPE_SNAPSHOT);
 862         libzfs_print_on_error(g_zfs, B_TRUE);
 863         if (szhp) {
 864                 /*
 865                  * Destroy any clones of this snapshot
 866                  */
 867                 if (zfs_iter_dependents(szhp, B_FALSE, destroy_callback,
 868                     cbp) != 0) {
 869                         zfs_close(szhp);
 870                         if (closezhp)
 871                                 zfs_close(zhp);
 872                         return (-1);
 873                 }
 874                 zfs_close(szhp);
 875         }
 876
 877         cbp->cb_closezhp = B_TRUE;
 878         rv = zfs_iter_filesystems(zhp, destroy_snap_clones, arg);
 879         if (closezhp)
 880                 zfs_close(zhp);
 881         return (rv);
 882 }
 883
 884 static int
 885 zfs_do_destroy(int argc, char **argv)
 886 {
 887         destroy_cbdata_t cb = { 0 };
 888         int c;
 889         zfs_handle_t *zhp;
 890         char *cp;
 891
 892         /* check options */
 893         while ((c = getopt(argc, argv, "frR")) != -1) {
 894                 switch (c) {
 895                 case 'f':
 896                         cb.cb_force = 1;
 897                         break;
 898                 case 'r':
 899                         cb.cb_recurse = 1;
 900                         break;
 901                 case 'R':
 902                         cb.cb_recurse = 1;
 903                         cb.cb_doclones = 1;
 904                         break;
 905                 case '?':
 906                 default:
 907                         (void) fprintf(stderr, gettext("invalid option '%c'\n"),
 908                             optopt);
 909                         usage(B_FALSE);
 910                 }
 911         }
 912
 913         argc -= optind;
 914         argv += optind;
 915
 916         /* check number of arguments */
 917         if (argc == 0) {
 918                 (void) fprintf(stderr, gettext("missing path argument\n"));
 919                 usage(B_FALSE);
 920         }
 921         if (argc > 1) {
 922                 (void) fprintf(stderr, gettext("too many arguments\n"));
 923                 usage(B_FALSE);
 924         }
 925
 926         /*
 927          * If we are doing recursive destroy of a snapshot, then the
 928          * named snapshot may not exist.  Go straight to libzfs.
 929          */
 930         if (cb.cb_recurse && (cp = strchr(argv[0], '@'))) {
 931                 int ret;
 932
 933                 *cp = '\0';
 934                 if ((zhp = zfs_open(g_zfs, argv[0], ZFS_TYPE_DATASET)) == NULL)
 935                         return (1);
 936                 *cp = '@';
 937                 cp++;
 938
 939                 if (cb.cb_doclones) {
 940                         cb.cb_snapname = cp;
 941                         if (destroy_snap_clones(zhp, &cb) != 0) {
 942                                 zfs_close(zhp);
 943                                 return (1);
 944                         }
 945                 }
 946
 947                 ret = zfs_destroy_snaps(zhp, cp);
 948                 zfs_close(zhp);
 949                 if (ret) {
 950                         (void) fprintf(stderr,
 951                             gettext("no snapshots destroyed\n"));
 952                 }
 953                 return (ret != 0);
 954         }
 955
 956
 957         /* Open the given dataset */
 958         if ((zhp = zfs_open(g_zfs, argv[0], ZFS_TYPE_DATASET)) == NULL)
 959                 return (1);
 960
 961         cb.cb_target = zhp;
 962
 963         /*
 964          * Perform an explicit check for pools before going any further.
 965          */
 966         if (!cb.cb_recurse && strchr(zfs_get_name(zhp), '/') == NULL &&
 967             zfs_get_type(zhp) == ZFS_TYPE_FILESYSTEM) {
 968                 (void) fprintf(stderr, gettext("cannot destroy '%s': "
 969                     "operation does not apply to pools\n"),
 970                     zfs_get_name(zhp));
 971                 (void) fprintf(stderr, gettext("use 'zfs destroy -r "
 972                     "%s' to destroy all datasets in the pool\n"),
 973                     zfs_get_name(zhp));
 974                 (void) fprintf(stderr, gettext("use 'zpool destroy %s' "
 975                     "to destroy the pool itself\n"), zfs_get_name(zhp));
 976                 zfs_close(zhp);
 977                 return (1);
 978         }
 979
 980         /*
 981          * Check for any dependents and/or clones.
 982          */
 983         cb.cb_first = B_TRUE;
 984         if (!cb.cb_doclones &&
 985             zfs_iter_dependents(zhp, B_TRUE, destroy_check_dependent,
 986             &cb) != 0) {
 987                 zfs_close(zhp);
 988                 return (1);
 989         }
 990
 991         if (cb.cb_error ||
 992             zfs_iter_dependents(zhp, B_FALSE, destroy_callback, &cb) != 0) {
 993                 zfs_close(zhp);
 994                 return (1);
 995         }
 996
 997         /*
 998          * Do the real thing.  The callback will close the handle regardless of
 999          * whether it succeeds or not.
1000          */
1001
1002         if (destroy_callback(zhp, &cb) != 0)
1003                 return (1);
1004
1005
1006         return (0);
1007 }
1008
1009 /*
1010  * zfs get [-rHp] [-o field[,field]...] [-s source[,source]...]
1011  *      < all | property[,property]... > < fs | snap | vol > ...
1012  *
1013  *      -r      recurse over any child datasets
1014  *      -H      scripted mode.  Headers are stripped, and fields are separated
1015  *              by tabs instead of spaces.
1016  *      -o      Set of fields to display.  One of "name,property,value,source".
1017  *              Default is all four.
1018  *      -s      Set of sources to allow.  One of
1019  *              "local,default,inherited,temporary,none".  Default is all
1020  *              five.
1021  *      -p      Display values in parsable (literal) format.
1022  *
1023  *  Prints properties for the given datasets.  The user can control which
1024  *  columns to display as well as which property types to allow.
1025  */
1026
1027 /*
1028  * Invoked to display the properties for a single dataset.
1029  */
1030 static int
1031 get_callback(zfs_handle_t *zhp, void *data)
1032 {
1033         char buf[ZFS_MAXPROPLEN];
1034         zprop_source_t sourcetype;
1035         char source[ZFS_MAXNAMELEN];
1036         zprop_get_cbdata_t *cbp = data;
1037         nvlist_t *userprop = zfs_get_user_props(zhp);
1038         zprop_list_t *pl = cbp->cb_proplist;
1039         nvlist_t *propval;
1040         char *strval;
1041         char *sourceval;
1042
1043         for (; pl != NULL; pl = pl->pl_next) {
1044                 /*
1045                  * Skip the special fake placeholder.  This will also skip over
1046                  * the name property when 'all' is specified.
1047                  */
1048                 if (pl->pl_prop == ZFS_PROP_NAME &&
1049                     pl == cbp->cb_proplist)
1050                         continue;
1051
1052                 if (pl->pl_prop != ZPROP_INVAL) {
1053                         if (zfs_prop_get(zhp, pl->pl_prop, buf,
1054                             sizeof (buf), &sourcetype, source,
1055                             sizeof (source),
1056                             cbp->cb_literal) != 0) {
1057                                 if (pl->pl_all)
1058                                         continue;
1059                                 if (!zfs_prop_valid_for_type(pl->pl_prop,
1060                                     ZFS_TYPE_DATASET)) {
1061                                         (void) fprintf(stderr,
1062                                             gettext("No such property '%s'\n"),
1063                                             zfs_prop_to_name(pl->pl_prop));
1064                                         continue;
1065                                 }
1066                                 sourcetype = ZPROP_SRC_NONE;
1067                                 (void) strlcpy(buf, "-", sizeof (buf));
1068                         }
1069
1070                         zprop_print_one_property(zfs_get_name(zhp), cbp,
1071                             zfs_prop_to_name(pl->pl_prop),
1072                             buf, sourcetype, source);
1073                 } else {
1074                         if (nvlist_lookup_nvlist(userprop,
1075                             pl->pl_user_prop, &propval) != 0) {
1076                                 if (pl->pl_all)
1077                                         continue;
1078                                 sourcetype = ZPROP_SRC_NONE;
1079                                 strval = "-";
1080                         } else {
1081                                 verify(nvlist_lookup_string(propval,
1082                                     ZPROP_VALUE, &strval) == 0);
1083                                 verify(nvlist_lookup_string(propval,
1084                                     ZPROP_SOURCE, &sourceval) == 0);
1085
1086                                 if (strcmp(sourceval,
1087                                     zfs_get_name(zhp)) == 0) {
1088                                         sourcetype = ZPROP_SRC_LOCAL;
1089                                 } else {
1090                                         sourcetype = ZPROP_SRC_INHERITED;
1091                                         (void) strlcpy(source,
1092                                             sourceval, sizeof (source));
1093                                 }
1094                         }
1095
1096                         zprop_print_one_property(zfs_get_name(zhp), cbp,
1097                             pl->pl_user_prop, strval, sourcetype,
1098                             source);
1099                 }
1100         }
1101
1102         return (0);
1103 }
1104
1105 static int
1106 zfs_do_get(int argc, char **argv)
1107 {
1108         zprop_get_cbdata_t cb = { 0 };
1109         int i, c, flags = 0;
1110         char *value, *fields;
1111         int ret;
1112         zprop_list_t fake_name = { 0 };
1113
1114         /*
1115          * Set up default columns and sources.
1116          */
1117         cb.cb_sources = ZPROP_SRC_ALL;
1118         cb.cb_columns[0] = GET_COL_NAME;
1119         cb.cb_columns[1] = GET_COL_PROPERTY;
1120         cb.cb_columns[2] = GET_COL_VALUE;
1121         cb.cb_columns[3] = GET_COL_SOURCE;
1122         cb.cb_type = ZFS_TYPE_DATASET;
1123
1124         /* check options */
1125         while ((c = getopt(argc, argv, ":o:s:rHp")) != -1) {
1126                 switch (c) {
1127                 case 'p':
1128                         cb.cb_literal = B_TRUE;
1129                         break;
1130                 case 'r':
1131                         flags |= ZFS_ITER_RECURSE;
1132                         break;
1133                 case 'H':
1134                         cb.cb_scripted = B_TRUE;
1135                         break;
1136                 case ':':
1137                         (void) fprintf(stderr, gettext("missing argument for "
1138                             "'%c' option\n"), optopt);
1139                         usage(B_FALSE);
1140                         break;
1141                 case 'o':
1142                         /*
1143                          * Process the set of columns to display.  We zero out
1144                          * the structure to give us a blank slate.
1145                          */
1146                         bzero(&cb.cb_columns, sizeof (cb.cb_columns));
1147                         i = 0;
1148                         while (*optarg != '\0') {
1149                                 static char *col_subopts[] =
1150                                     { "name", "property", "value", "source",
1151                                     NULL };
1152
1153                                 if (i == 4) {
1154                                         (void) fprintf(stderr, gettext("too "
1155                                             "many fields given to -o "
1156                                             "option\n"));
1157                                         usage(B_FALSE);
1158                                 }
1159
1160                                 switch (getsubopt(&optarg, col_subopts,
1161                                     &value)) {
1162                                 case 0:
1163                                         cb.cb_columns[i++] = GET_COL_NAME;
1164                                         break;
1165                                 case 1:
1166                                         cb.cb_columns[i++] = GET_COL_PROPERTY;
1167                                         break;
1168                                 case 2:
1169                                         cb.cb_columns[i++] = GET_COL_VALUE;
1170                                         break;
1171                                 case 3:
1172                                         cb.cb_columns[i++] = GET_COL_SOURCE;
1173                                         break;
1174                                 default:
1175                                         (void) fprintf(stderr,
1176                                             gettext("invalid column name "
1177                                             "'%s'\n"), value);
1178                                         usage(B_FALSE);
1179                                 }
1180                         }
1181                         break;
1182
1183                 case 's':
1184                         cb.cb_sources = 0;
1185                         while (*optarg != '\0') {
1186                                 static char *source_subopts[] = {
1187                                         "local", "default", "inherited",
1188                                         "temporary", "none", NULL };
1189
1190                                 switch (getsubopt(&optarg, source_subopts,
1191                                     &value)) {
1192                                 case 0:
1193                                         cb.cb_sources |= ZPROP_SRC_LOCAL;
1194                                         break;
1195                                 case 1:
1196                                         cb.cb_sources |= ZPROP_SRC_DEFAULT;
1197                                         break;
1198                                 case 2:
1199                                         cb.cb_sources |= ZPROP_SRC_INHERITED;
1200                                         break;
1201                                 case 3:
1202                                         cb.cb_sources |= ZPROP_SRC_TEMPORARY;
1203                                         break;
1204                                 case 4:
1205                                         cb.cb_sources |= ZPROP_SRC_NONE;
1206                                         break;
1207                                 default:
1208                                         (void) fprintf(stderr,
1209                                             gettext("invalid source "
1210                                             "'%s'\n"), value);
1211                                         usage(B_FALSE);
1212                                 }
1213                         }
1214                         break;
1215
1216                 case '?':
1217                         (void) fprintf(stderr, gettext("invalid option '%c'\n"),
1218                             optopt);
1219                         usage(B_FALSE);
1220                 }
1221         }
1222
1223         argc -= optind;
1224         argv += optind;
1225
1226         if (argc < 1) {
1227                 (void) fprintf(stderr, gettext("missing property "
1228                     "argument\n"));
1229                 usage(B_FALSE);
1230         }
1231
1232         fields = argv[0];
1233
1234         if (zprop_get_list(g_zfs, fields, &cb.cb_proplist, ZFS_TYPE_DATASET)
1235             != 0)
1236                 usage(B_FALSE);
1237
1238         argc--;
1239         argv++;
1240
1241         /*
1242          * As part of zfs_expand_proplist(), we keep track of the maximum column
1243          * width for each property.  For the 'NAME' (and 'SOURCE') columns, we
1244          * need to know the maximum name length.  However, the user likely did
1245          * not specify 'name' as one of the properties to fetch, so we need to
1246          * make sure we always include at least this property for
1247          * print_get_headers() to work properly.
1248          */
1249         if (cb.cb_proplist != NULL) {
1250                 fake_name.pl_prop = ZFS_PROP_NAME;
1251                 fake_name.pl_width = strlen(gettext("NAME"));
1252                 fake_name.pl_next = cb.cb_proplist;
1253                 cb.cb_proplist = &fake_name;
1254         }
1255
1256         cb.cb_first = B_TRUE;
1257
1258         /* run for each object */
1259         ret = zfs_for_each(argc, argv, flags, ZFS_TYPE_DATASET, NULL,
1260             &cb.cb_proplist, get_callback, &cb);
1261
1262         if (cb.cb_proplist == &fake_name)
1263                 zprop_free_list(fake_name.pl_next);
1264         else
1265                 zprop_free_list(cb.cb_proplist);
1266
1267         return (ret);
1268 }
1269
1270 /*
1271  * inherit [-r] <property> <fs|vol> ...
1272  *
1273  *      -r      Recurse over all children
1274  *
1275  * For each dataset specified on the command line, inherit the given property
1276  * from its parent.  Inheriting a property at the pool level will cause it to
1277  * use the default value.  The '-r' flag will recurse over all children, and is
1278  * useful for setting a property on a hierarchy-wide basis, regardless of any
1279  * local modifications for each dataset.
1280  */
1281
1282 static int
1283 inherit_recurse_cb(zfs_handle_t *zhp, void *data)
1284 {
1285         char *propname = data;
1286         zfs_prop_t prop = zfs_name_to_prop(propname);
1287
1288         /*
1289          * If we're doing it recursively, then ignore properties that
1290          * are not valid for this type of dataset.
1291          */
1292         if (prop != ZPROP_INVAL &&
1293             !zfs_prop_valid_for_type(prop, zfs_get_type(zhp)))
1294                 return (0);
1295
1296         return (zfs_prop_inherit(zhp, propname) != 0);
1297 }
1298
1299 static int
1300 inherit_cb(zfs_handle_t *zhp, void *data)
1301 {
1302         char *propname = data;
1303
1304         return (zfs_prop_inherit(zhp, propname) != 0);
1305 }
1306
1307 static int
1308 zfs_do_inherit(int argc, char **argv)
1309 {
1310         int c;
1311         zfs_prop_t prop;
1312         char *propname;
1313         int ret;
1314         int flags = 0;
1315
1316         /* check options */
1317         while ((c = getopt(argc, argv, "r")) != -1) {
1318                 switch (c) {
1319                 case 'r':
1320                         flags |= ZFS_ITER_RECURSE;
1321                         break;
1322                 case '?':
1323                 default:
1324                         (void) fprintf(stderr, gettext("invalid option '%c'\n"),
1325                             optopt);
1326                         usage(B_FALSE);
1327                 }
1328         }
1329
1330         argc -= optind;
1331         argv += optind;
1332
1333         /* check number of arguments */
1334         if (argc < 1) {
1335                 (void) fprintf(stderr, gettext("missing property argument\n"));
1336                 usage(B_FALSE);
1337         }
1338         if (argc < 2) {
1339                 (void) fprintf(stderr, gettext("missing dataset argument\n"));
1340                 usage(B_FALSE);
1341         }
1342
1343         propname = argv[0];
1344         argc--;
1345         argv++;
1346
1347         if ((prop = zfs_name_to_prop(propname)) != ZPROP_INVAL) {
1348                 if (zfs_prop_readonly(prop)) {
1349                         (void) fprintf(stderr, gettext(
1350                             "%s property is read-only\n"),
1351                             propname);
1352                         return (1);
1353                 }
1354                 if (!zfs_prop_inheritable(prop)) {
1355                         (void) fprintf(stderr, gettext("'%s' property cannot "
1356                             "be inherited\n"), propname);
1357                         if (prop == ZFS_PROP_QUOTA ||
1358                             prop == ZFS_PROP_RESERVATION ||
1359                             prop == ZFS_PROP_REFQUOTA ||
1360                             prop == ZFS_PROP_REFRESERVATION)
1361                                 (void) fprintf(stderr, gettext("use 'zfs set "
1362                                     "%s=none' to clear\n"), propname);
1363                         return (1);
1364                 }
1365         } else if (!zfs_prop_user(propname)) {
1366                 (void) fprintf(stderr, gettext("invalid property '%s'\n"),
1367                     propname);
1368                 usage(B_FALSE);
1369         }
1370
1371         if (flags & ZFS_ITER_RECURSE) {
1372                 ret = zfs_for_each(argc, argv, flags, ZFS_TYPE_DATASET,
1373                     NULL, NULL, inherit_recurse_cb, propname);
1374         } else {
1375                 ret = zfs_for_each(argc, argv, flags, ZFS_TYPE_DATASET,
1376                     NULL, NULL, inherit_cb, propname);
1377         }
1378
1379         return (ret);
1380 }
1381
1382 typedef struct upgrade_cbdata {
1383         uint64_t cb_numupgraded;
1384         uint64_t cb_numsamegraded;
1385         uint64_t cb_numfailed;
1386         uint64_t cb_version;
1387         boolean_t cb_newer;
1388         boolean_t cb_foundone;
1389         char cb_lastfs[ZFS_MAXNAMELEN];
1390 } upgrade_cbdata_t;
1391
1392 static int
1393 same_pool(zfs_handle_t *zhp, const char *name)
1394 {
1395         int len1 = strcspn(name, "/@");
1396         const char *zhname = zfs_get_name(zhp);
1397         int len2 = strcspn(zhname, "/@");
1398
1399         if (len1 != len2)
1400                 return (B_FALSE);
1401         return (strncmp(name, zhname, len1) == 0);
1402 }
1403
1404 static int
1405 upgrade_list_callback(zfs_handle_t *zhp, void *data)
1406 {
1407         upgrade_cbdata_t *cb = data;
1408         int version = zfs_prop_get_int(zhp, ZFS_PROP_VERSION);
1409
1410         /* list if it's old/new */
1411         if ((!cb->cb_newer && version < ZPL_VERSION) ||
1412             (cb->cb_newer && version > ZPL_VERSION)) {
1413                 char *str;
1414                 if (cb->cb_newer) {
1415                         str = gettext("The following filesystems are "
1416                             "formatted using a newer software version and\n"
1417                             "cannot be accessed on the current system.\n\n");
1418                 } else {
1419                         str = gettext("The following filesystems are "
1420                             "out of date, and can be upgraded.  After being\n"
1421                             "upgraded, these filesystems (and any 'zfs send' "
1422                             "streams generated from\n"
1423                             "subsequent snapshots) will no longer be "
1424                             "accessible by older software versions.\n\n");
1425                 }
1426
1427                 if (!cb->cb_foundone) {
1428                         (void) puts(str);
1429                         (void) printf(gettext("VER  FILESYSTEM\n"));
1430                         (void) printf(gettext("---  ------------\n"));
1431                         cb->cb_foundone = B_TRUE;
1432                 }
1433
1434                 (void) printf("%2u   %s\n", version, zfs_get_name(zhp));
1435         }
1436
1437         return (0);
1438 }
1439
1440 static int
1441 upgrade_set_callback(zfs_handle_t *zhp, void *data)
1442 {
1443         upgrade_cbdata_t *cb = data;
1444         int version = zfs_prop_get_int(zhp, ZFS_PROP_VERSION);
1445
1446         if (cb->cb_version >= ZPL_VERSION_FUID) {
1447                 int spa_version;
1448
1449                 if (zfs_spa_version(zhp, &spa_version) < 0)
1450                         return (-1);
1451
1452                 if (spa_version < SPA_VERSION_FUID) {
1453                         /* can't upgrade */
1454                         (void) printf(gettext("%s: can not be upgraded; "
1455                             "the pool version needs to first be upgraded\nto "
1456                             "version %d\n\n"),
1457                             zfs_get_name(zhp), SPA_VERSION_FUID);
1458                         cb->cb_numfailed++;
1459                         return (0);
1460                 }
1461         }
1462
1463         /* upgrade */
1464         if (version < cb->cb_version) {
1465                 char verstr[16];
1466                 (void) snprintf(verstr, sizeof (verstr),
1467                     "%llu", cb->cb_version);
1468                 if (cb->cb_lastfs[0] && !same_pool(zhp, cb->cb_lastfs)) {
1469                         /*
1470                          * If they did "zfs upgrade -a", then we could
1471                          * be doing ioctls to different pools.  We need
1472                          * to log this history once to each pool.
1473                          */
1474                         verify(zpool_stage_history(g_zfs, history_str) == 0);
1475                 }
1476                 if (zfs_prop_set(zhp, "version", verstr) == 0)
1477                         cb->cb_numupgraded++;
1478                 else
1479                         cb->cb_numfailed++;
1480                 (void) strcpy(cb->cb_lastfs, zfs_get_name(zhp));
1481         } else if (version > cb->cb_version) {
1482                 /* can't downgrade */
1483                 (void) printf(gettext("%s: can not be downgraded; "
1484                     "it is already at version %u\n"),
1485                     zfs_get_name(zhp), version);
1486                 cb->cb_numfailed++;
1487         } else {
1488                 cb->cb_numsamegraded++;
1489         }
1490         return (0);
1491 }
1492
1493 /*
1494  * zfs upgrade
1495  * zfs upgrade -v
1496  * zfs upgrade [-r] [-V <version>] <-a | filesystem>
1497  */
1498 static int
1499 zfs_do_upgrade(int argc, char **argv)
1500 {
1501         boolean_t all = B_FALSE;
1502         boolean_t showversions = B_FALSE;
1503         int ret;
1504         upgrade_cbdata_t cb = { 0 };
1505         char c;
1506         int flags = ZFS_ITER_ARGS_CAN_BE_PATHS;
1507
1508         /* check options */
1509         while ((c = getopt(argc, argv, "rvV:a")) != -1) {
1510                 switch (c) {
1511                 case 'r':
1512                         flags |= ZFS_ITER_RECURSE;
1513                         break;
1514                 case 'v':
1515                         showversions = B_TRUE;
1516                         break;
1517                 case 'V':
1518                         if (zfs_prop_string_to_index(ZFS_PROP_VERSION,
1519                             optarg, &cb.cb_version) != 0) {
1520                                 (void) fprintf(stderr,
1521                                     gettext("invalid version %s\n"), optarg);
1522                                 usage(B_FALSE);
1523                         }
1524                         break;
1525                 case 'a':
1526                         all = B_TRUE;
1527                         break;
1528                 case '?':
1529                 default:
1530                         (void) fprintf(stderr, gettext("invalid option '%c'\n"),
1531                             optopt);
1532                         usage(B_FALSE);
1533                 }
1534         }
1535
1536         argc -= optind;
1537         argv += optind;
1538
1539         if ((!all && !argc) && ((flags & ZFS_ITER_RECURSE) | cb.cb_version))
1540                 usage(B_FALSE);
1541         if (showversions && (flags & ZFS_ITER_RECURSE || all ||
1542             cb.cb_version || argc))
1543                 usage(B_FALSE);
1544         if ((all || argc) && (showversions))
1545                 usage(B_FALSE);
1546         if (all && argc)
1547                 usage(B_FALSE);
1548
1549         if (showversions) {
1550                 /* Show info on available versions. */
1551                 (void) printf(gettext("The following filesystem versions are "
1552                     "supported:\n\n"));
1553                 (void) printf(gettext("VER  DESCRIPTION\n"));
1554                 (void) printf("---  -----------------------------------------"
1555                     "---------------\n");
1556                 (void) printf(gettext(" 1   Initial ZFS filesystem version\n"));
1557                 (void) printf(gettext(" 2   Enhanced directory entries\n"));
1558                 (void) printf(gettext(" 3   Case insensitive and File system "
1559                     "unique identifer (FUID)\n"));
1560                 (void) printf(gettext("\nFor more information on a particular "
1561                     "version, including supported releases, see:\n\n"));
1562                 (void) printf("http://www.opensolaris.org/os/community/zfs/"
1563                     "version/zpl/N\n\n");
1564                 (void) printf(gettext("Where 'N' is the version number.\n"));
1565                 ret = 0;
1566         } else if (argc || all) {
1567                 /* Upgrade filesystems */
1568                 if (cb.cb_version == 0)
1569                         cb.cb_version = ZPL_VERSION;
1570                 ret = zfs_for_each(argc, argv, flags, ZFS_TYPE_FILESYSTEM,
1571                     NULL, NULL, upgrade_set_callback, &cb);
1572                 (void) printf(gettext("%llu filesystems upgraded\n"),
1573                     cb.cb_numupgraded);
1574                 if (cb.cb_numsamegraded) {
1575                         (void) printf(gettext("%llu filesystems already at "
1576                             "this version\n"),
1577                             cb.cb_numsamegraded);
1578                 }
1579                 if (cb.cb_numfailed != 0)
1580                         ret = 1;
1581         } else {
1582                 /* List old-version filesytems */
1583                 boolean_t found;
1584                 (void) printf(gettext("This system is currently running "
1585                     "ZFS filesystem version %llu.\n\n"), ZPL_VERSION);
1586
1587                 flags |= ZFS_ITER_RECURSE;
1588                 ret = zfs_for_each(0, NULL, flags, ZFS_TYPE_FILESYSTEM,
1589                     NULL, NULL, upgrade_list_callback, &cb);
1590
1591                 found = cb.cb_foundone;
1592                 cb.cb_foundone = B_FALSE;
1593                 cb.cb_newer = B_TRUE;
1594
1595                 ret = zfs_for_each(0, NULL, flags, ZFS_TYPE_FILESYSTEM,
1596                     NULL, NULL, upgrade_list_callback, &cb);
1597
1598                 if (!cb.cb_foundone && !found) {
1599                         (void) printf(gettext("All filesystems are "
1600                             "formatted with the current version.\n"));
1601                 }
1602         }
1603
1604         return (ret);
1605 }
1606
1607 /*
1608  * list [-rH] [-o property[,property]...] [-t type[,type]...]
1609  *      [-s property [-s property]...] [-S property [-S property]...]
1610  *      <dataset> ...
1611  *
1612  *      -r      Recurse over all children
1613  *      -H      Scripted mode; elide headers and separate columns by tabs
1614  *      -o      Control which fields to display.
1615  *      -t      Control which object types to display.
1616  *      -s      Specify sort columns, descending order.
1617  *      -S      Specify sort columns, ascending order.
1618  *
1619  * When given no arguments, lists all filesystems in the system.
1620  * Otherwise, list the specified datasets, optionally recursing down them if
1621  * '-r' is specified.
1622  */
1623 typedef struct list_cbdata {
1624         boolean_t       cb_first;
1625         boolean_t       cb_scripted;
1626         zprop_list_t    *cb_proplist;
1627 } list_cbdata_t;
1628
1629 /*
1630  * Given a list of columns to display, output appropriate headers for each one.
1631  */
1632 static void
1633 print_header(zprop_list_t *pl)
1634 {
1635         char headerbuf[ZFS_MAXPROPLEN];
1636         const char *header;
1637         int i;
1638         boolean_t first = B_TRUE;
1639         boolean_t right_justify;
1640
1641         for (; pl != NULL; pl = pl->pl_next) {
1642                 if (!first) {
1643                         (void) printf("  ");
1644                 } else {
1645                         first = B_FALSE;
1646                 }
1647
1648                 right_justify = B_FALSE;
1649                 if (pl->pl_prop != ZPROP_INVAL) {
1650                         header = zfs_prop_column_name(pl->pl_prop);
1651                         right_justify = zfs_prop_align_right(pl->pl_prop);
1652                 } else {
1653                         for (i = 0; pl->pl_user_prop[i] != '\0'; i++)
1654                                 headerbuf[i] = toupper(pl->pl_user_prop[i]);
1655                         headerbuf[i] = '\0';
1656                         header = headerbuf;
1657                 }
1658
1659                 if (pl->pl_next == NULL && !right_justify)
1660                         (void) printf("%s", header);
1661                 else if (right_justify)
1662                         (void) printf("%*s", pl->pl_width, header);
1663                 else
1664                         (void) printf("%-*s", pl->pl_width, header);
1665         }
1666
1667         (void) printf("\n");
1668 }
1669
1670 /*
1671  * Given a dataset and a list of fields, print out all the properties according
1672  * to the described layout.
1673  */
1674 static void
1675 print_dataset(zfs_handle_t *zhp, zprop_list_t *pl, boolean_t scripted)
1676 {
1677         boolean_t first = B_TRUE;
1678         char property[ZFS_MAXPROPLEN];
1679         nvlist_t *userprops = zfs_get_user_props(zhp);
1680         nvlist_t *propval;
1681         char *propstr;
1682         boolean_t right_justify;
1683         int width;
1684
1685         for (; pl != NULL; pl = pl->pl_next) {
1686                 if (!first) {
1687                         if (scripted)
1688                                 (void) printf("\t");
1689                         else
1690                                 (void) printf("  ");
1691                 } else {
1692                         first = B_FALSE;
1693                 }
1694
1695                 right_justify = B_FALSE;
1696                 if (pl->pl_prop != ZPROP_INVAL) {
1697                         if (zfs_prop_get(zhp, pl->pl_prop, property,
1698                             sizeof (property), NULL, NULL, 0, B_FALSE) != 0)
1699                                 propstr = "-";
1700                         else
1701                                 propstr = property;
1702
1703                         right_justify = zfs_prop_align_right(pl->pl_prop);
1704                 } else {
1705                         if (nvlist_lookup_nvlist(userprops,
1706                             pl->pl_user_prop, &propval) != 0)
1707                                 propstr = "-";
1708                         else
1709                                 verify(nvlist_lookup_string(propval,
1710                                     ZPROP_VALUE, &propstr) == 0);
1711                 }
1712
1713                 width = pl->pl_width;
1714
1715                 /*
1716                  * If this is being called in scripted mode, or if this is the
1717                  * last column and it is left-justified, don't include a width
1718                  * format specifier.
1719                  */
1720                 if (scripted || (pl->pl_next == NULL && !right_justify))
1721                         (void) printf("%s", propstr);
1722                 else if (right_justify)
1723                         (void) printf("%*s", width, propstr);
1724                 else
1725                         (void) printf("%-*s", width, propstr);
1726         }
1727
1728         (void) printf("\n");
1729 }
1730
1731 /*
1732  * Generic callback function to list a dataset or snapshot.
1733  */
1734 static int
1735 list_callback(zfs_handle_t *zhp, void *data)
1736 {
1737         list_cbdata_t *cbp = data;
1738
1739         if (cbp->cb_first) {
1740                 if (!cbp->cb_scripted)
1741                         print_header(cbp->cb_proplist);
1742                 cbp->cb_first = B_FALSE;
1743         }
1744
1745         print_dataset(zhp, cbp->cb_proplist, cbp->cb_scripted);
1746
1747         return (0);
1748 }
1749
1750 static int
1751 zfs_do_list(int argc, char **argv)
1752 {
1753         int c;
1754         boolean_t scripted = B_FALSE;
1755         static char default_fields[] =
1756             "name,used,available,referenced,mountpoint";
1757         int types = ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME;
1758         boolean_t types_specified = B_FALSE;
1759         char *fields = NULL;
1760         list_cbdata_t cb = { 0 };
1761         char *value;
1762         int ret;
1763         zfs_sort_column_t *sortcol = NULL;
1764         int flags = ZFS_ITER_PROP_LISTSNAPS | ZFS_ITER_ARGS_CAN_BE_PATHS;
1765
1766         /* check options */
1767         while ((c = getopt(argc, argv, ":o:rt:Hs:S:")) != -1) {
1768                 switch (c) {
1769                 case 'o':
1770                         fields = optarg;
1771                         break;
1772                 case 'r':
1773                         flags |= ZFS_ITER_RECURSE;
1774                         break;
1775                 case 'H':
1776                         scripted = B_TRUE;
1777                         break;
1778                 case 's':
1779                         if (zfs_add_sort_column(&sortcol, optarg,
1780                             B_FALSE) != 0) {
1781                                 (void) fprintf(stderr,
1782                                     gettext("invalid property '%s'\n"), optarg);
1783                                 usage(B_FALSE);
1784                         }
1785                         break;
1786                 case 'S':
1787                         if (zfs_add_sort_column(&sortcol, optarg,
1788                             B_TRUE) != 0) {
1789                                 (void) fprintf(stderr,
1790                                     gettext("invalid property '%s'\n"), optarg);
1791                                 usage(B_FALSE);
1792                         }
1793                         break;
1794                 case 't':
1795                         types = 0;
1796                         types_specified = B_TRUE;
1797                         flags &= ~ZFS_ITER_PROP_LISTSNAPS;
1798                         while (*optarg != '\0') {
1799                                 static char *type_subopts[] = { "filesystem",
1800                                     "volume", "snapshot", "all", NULL };
1801
1802                                 switch (getsubopt(&optarg, type_subopts,
1803                                     &value)) {
1804                                 case 0:
1805                                         types |= ZFS_TYPE_FILESYSTEM;
1806                                         break;
1807                                 case 1:
1808                                         types |= ZFS_TYPE_VOLUME;
1809                                         break;
1810                                 case 2:
1811                                         types |= ZFS_TYPE_SNAPSHOT;
1812                                         break;
1813                                 case 3:
1814                                         types = ZFS_TYPE_DATASET;
1815                                         break;
1816
1817                                 default:
1818                                         (void) fprintf(stderr,
1819                                             gettext("invalid type '%s'\n"),
1820                                             value);
1821                                         usage(B_FALSE);
1822                                 }
1823                         }
1824                         break;
1825                 case ':':
1826                         (void) fprintf(stderr, gettext("missing argument for "
1827                             "'%c' option\n"), optopt);
1828                         usage(B_FALSE);
1829                         break;
1830                 case '?':
1831                         (void) fprintf(stderr, gettext("invalid option '%c'\n"),
1832                             optopt);
1833                         usage(B_FALSE);
1834                 }
1835         }
1836
1837         argc -= optind;
1838         argv += optind;
1839
1840         if (fields == NULL)
1841                 fields = default_fields;
1842
1843         /*
1844          * If "-o space" and no types were specified, don't display snapshots.
1845          */
1846         if (strcmp(fields, "space") == 0 && types_specified == B_FALSE)
1847                 types &= ~ZFS_TYPE_SNAPSHOT;
1848
1849         /*
1850          * If the user specifies '-o all', the zprop_get_list() doesn't
1851          * normally include the name of the dataset.  For 'zfs list', we always
1852          * want this property to be first.
1853          */
1854         if (zprop_get_list(g_zfs, fields, &cb.cb_proplist, ZFS_TYPE_DATASET)
1855             != 0)
1856                 usage(B_FALSE);
1857
1858         cb.cb_scripted = scripted;
1859         cb.cb_first = B_TRUE;
1860
1861         ret = zfs_for_each(argc, argv, flags, types, sortcol, &cb.cb_proplist,
1862             list_callback, &cb);
1863
1864         zprop_free_list(cb.cb_proplist);
1865         zfs_free_sort_columns(sortcol);
1866
1867         if (ret == 0 && cb.cb_first && !cb.cb_scripted)
1868                 (void) printf(gettext("no datasets available\n"));
1869
1870         return (ret);
1871 }
1872
1873 /*
1874  * zfs rename <fs | snap | vol> <fs | snap | vol>
1875  * zfs rename -p <fs | vol> <fs | vol>
1876  * zfs rename -r <snap> <snap>
1877  *
1878  * Renames the given dataset to another of the same type.
1879  *
1880  * The '-p' flag creates all the non-existing ancestors of the target first.
1881  */
1882 /* ARGSUSED */
1883 static int
1884 zfs_do_rename(int argc, char **argv)
1885 {
1886         zfs_handle_t *zhp;
1887         int c;
1888         int ret;
1889         boolean_t recurse = B_FALSE;
1890         boolean_t parents = B_FALSE;
1891
1892         /* check options */
1893         while ((c = getopt(argc, argv, "pr")) != -1) {
1894                 switch (c) {
1895                 case 'p':
1896                         parents = B_TRUE;
1897                         break;
1898                 case 'r':
1899                         recurse = B_TRUE;
1900                         break;
1901                 case '?':
1902                 default:
1903                         (void) fprintf(stderr, gettext("invalid option '%c'\n"),
1904                             optopt);
1905                         usage(B_FALSE);
1906                 }
1907         }
1908
1909         argc -= optind;
1910         argv += optind;
1911
1912         /* check number of arguments */
1913         if (argc < 1) {
1914                 (void) fprintf(stderr, gettext("missing source dataset "
1915                     "argument\n"));
1916                 usage(B_FALSE);
1917         }
1918         if (argc < 2) {
1919                 (void) fprintf(stderr, gettext("missing target dataset "
1920                     "argument\n"));
1921                 usage(B_FALSE);
1922         }
1923         if (argc > 2) {
1924                 (void) fprintf(stderr, gettext("too many arguments\n"));
1925                 usage(B_FALSE);
1926         }
1927
1928         if (recurse && parents) {
1929                 (void) fprintf(stderr, gettext("-p and -r options are mutually "
1930                     "exclusive\n"));
1931                 usage(B_FALSE);
1932         }
1933
1934         if (recurse && strchr(argv[0], '@') == 0) {
1935                 (void) fprintf(stderr, gettext("source dataset for recursive "
1936                     "rename must be a snapshot\n"));
1937                 usage(B_FALSE);
1938         }
1939
1940         if ((zhp = zfs_open(g_zfs, argv[0], parents ? ZFS_TYPE_FILESYSTEM |
1941             ZFS_TYPE_VOLUME : ZFS_TYPE_DATASET)) == NULL)
1942                 return (1);
1943
1944         /* If we were asked and the name looks good, try to create ancestors. */
1945         if (parents && zfs_name_valid(argv[1], zfs_get_type(zhp)) &&
1946             zfs_create_ancestors(g_zfs, argv[1]) != 0) {
1947                 zfs_close(zhp);
1948                 return (1);
1949         }
1950
1951         ret = (zfs_rename(zhp, argv[1], recurse) != 0);
1952
1953         zfs_close(zhp);
1954         return (ret);
1955 }
1956
1957 /*
1958  * zfs promote <fs>
1959  *
1960  * Promotes the given clone fs to be the parent
1961  */
1962 /* ARGSUSED */
1963 static int
1964 zfs_do_promote(int argc, char **argv)
1965 {
1966         zfs_handle_t *zhp;
1967         int ret;
1968
1969         /* check options */
1970         if (argc > 1 && argv[1][0] == '-') {
1971                 (void) fprintf(stderr, gettext("invalid option '%c'\n"),
1972                     argv[1][1]);
1973                 usage(B_FALSE);
1974         }
1975
1976         /* check number of arguments */
1977         if (argc < 2) {
1978                 (void) fprintf(stderr, gettext("missing clone filesystem"
1979                     " argument\n"));
1980                 usage(B_FALSE);
1981         }
1982         if (argc > 2) {
1983                 (void) fprintf(stderr, gettext("too many arguments\n"));
1984                 usage(B_FALSE);
1985         }
1986
1987         zhp = zfs_open(g_zfs, argv[1], ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME);
1988         if (zhp == NULL)
1989                 return (1);
1990
1991         ret = (zfs_promote(zhp) != 0);
1992
1993
1994         zfs_close(zhp);
1995         return (ret);
1996 }
1997
1998 /*
1999  * zfs rollback [-rRf] <snapshot>
2000  *
2001  *      -r      Delete any intervening snapshots before doing rollback
2002  *      -R      Delete any snapshots and their clones
2003  *      -f      ignored for backwards compatability
2004  *
2005  * Given a filesystem, rollback to a specific snapshot, discarding any changes
2006  * since then and making it the active dataset.  If more recent snapshots exist,
2007  * the command will complain unless the '-r' flag is given.
2008  */
2009 typedef struct rollback_cbdata {
2010         uint64_t        cb_create;
2011         boolean_t       cb_first;
2012         int             cb_doclones;
2013         char            *cb_target;
2014         int             cb_error;
2015         boolean_t       cb_recurse;
2016         boolean_t       cb_dependent;
2017 } rollback_cbdata_t;
2018
2019 /*
2020  * Report any snapshots more recent than the one specified.  Used when '-r' is
2021  * not specified.  We reuse this same callback for the snapshot dependents - if
2022  * 'cb_dependent' is set, then this is a dependent and we should report it
2023  * without checking the transaction group.
2024  */
2025 static int
2026 rollback_check(zfs_handle_t *zhp, void *data)
2027 {
2028         rollback_cbdata_t *cbp = data;
2029
2030         if (cbp->cb_doclones) {
2031                 zfs_close(zhp);
2032                 return (0);
2033         }
2034
2035         if (!cbp->cb_dependent) {
2036                 if (strcmp(zfs_get_name(zhp), cbp->cb_target) != 0 &&
2037                     zfs_get_type(zhp) == ZFS_TYPE_SNAPSHOT &&
2038                     zfs_prop_get_int(zhp, ZFS_PROP_CREATETXG) >
2039                     cbp->cb_create) {
2040
2041                         if (cbp->cb_first && !cbp->cb_recurse) {
2042                                 (void) fprintf(stderr, gettext("cannot "
2043                                     "rollback to '%s': more recent snapshots "
2044                                     "exist\n"),
2045                                     cbp->cb_target);
2046                                 (void) fprintf(stderr, gettext("use '-r' to "
2047                                     "force deletion of the following "
2048                                     "snapshots:\n"));
2049                                 cbp->cb_first = 0;
2050                                 cbp->cb_error = 1;
2051                         }
2052
2053                         if (cbp->cb_recurse) {
2054                                 cbp->cb_dependent = B_TRUE;
2055                                 if (zfs_iter_dependents(zhp, B_TRUE,
2056                                     rollback_check, cbp) != 0) {
2057                                         zfs_close(zhp);
2058                                         return (-1);
2059                                 }
2060                                 cbp->cb_dependent = B_FALSE;
2061                         } else {
2062                                 (void) fprintf(stderr, "%s\n",
2063                                     zfs_get_name(zhp));
2064                         }
2065                 }
2066         } else {
2067                 if (cbp->cb_first && cbp->cb_recurse) {
2068                         (void) fprintf(stderr, gettext("cannot rollback to "
2069                             "'%s': clones of previous snapshots exist\n"),
2070                             cbp->cb_target);
2071                         (void) fprintf(stderr, gettext("use '-R' to "
2072                             "force deletion of the following clones and "
2073                             "dependents:\n"));
2074                         cbp->cb_first = 0;
2075                         cbp->cb_error = 1;
2076                 }
2077
2078                 (void) fprintf(stderr, "%s\n", zfs_get_name(zhp));
2079         }
2080
2081         zfs_close(zhp);
2082         return (0);
2083 }
2084
2085 static int
2086 zfs_do_rollback(int argc, char **argv)
2087 {
2088         int ret;
2089         int c;
2090         boolean_t force = B_FALSE;
2091         rollback_cbdata_t cb = { 0 };
2092         zfs_handle_t *zhp, *snap;
2093         char parentname[ZFS_MAXNAMELEN];
2094         char *delim;
2095
2096         /* check options */
2097         while ((c = getopt(argc, argv, "rRf")) != -1) {
2098                 switch (c) {
2099                 case 'r':
2100                         cb.cb_recurse = 1;
2101                         break;
2102                 case 'R':
2103                         cb.cb_recurse = 1;
2104                         cb.cb_doclones = 1;
2105                         break;
2106                 case 'f':
2107                         force = B_TRUE;
2108                         break;
2109                 case '?':
2110                         (void) fprintf(stderr, gettext("invalid option '%c'\n"),
2111                             optopt);
2112                         usage(B_FALSE);
2113                 }
2114         }
2115
2116         argc -= optind;
2117         argv += optind;
2118
2119         /* check number of arguments */
2120         if (argc < 1) {
2121                 (void) fprintf(stderr, gettext("missing dataset argument\n"));
2122                 usage(B_FALSE);
2123         }
2124         if (argc > 1) {
2125                 (void) fprintf(stderr, gettext("too many arguments\n"));
2126                 usage(B_FALSE);
2127         }
2128
2129         /* open the snapshot */
2130         if ((snap = zfs_open(g_zfs, argv[0], ZFS_TYPE_SNAPSHOT)) == NULL)
2131                 return (1);
2132
2133         /* open the parent dataset */
2134         (void) strlcpy(parentname, argv[0], sizeof (parentname));
2135         verify((delim = strrchr(parentname, '@')) != NULL);
2136         *delim = '\0';
2137         if ((zhp = zfs_open(g_zfs, parentname, ZFS_TYPE_DATASET)) == NULL) {
2138                 zfs_close(snap);
2139                 return (1);
2140         }
2141
2142         /*
2143          * Check for more recent snapshots and/or clones based on the presence
2144          * of '-r' and '-R'.
2145          */
2146         cb.cb_target = argv[0];
2147         cb.cb_create = zfs_prop_get_int(snap, ZFS_PROP_CREATETXG);
2148         cb.cb_first = B_TRUE;
2149         cb.cb_error = 0;
2150         if ((ret = zfs_iter_children(zhp, rollback_check, &cb)) != 0)
2151                 goto out;
2152
2153         if ((ret = cb.cb_error) != 0)
2154                 goto out;
2155
2156         /*
2157          * Rollback parent to the given snapshot.
2158          */
2159         ret = zfs_rollback(zhp, snap, force);
2160
2161 out:
2162         zfs_close(snap);
2163         zfs_close(zhp);
2164
2165         if (ret == 0)
2166                 return (0);
2167         else
2168                 return (1);
2169 }
2170
2171 /*
2172  * zfs set property=value { fs | snap | vol } ...
2173  *
2174  * Sets the given property for all datasets specified on the command line.
2175  */
2176 typedef struct set_cbdata {
2177         char            *cb_propname;
2178         char            *cb_value;
2179 } set_cbdata_t;
2180
2181 static int
2182 set_callback(zfs_handle_t *zhp, void *data)
2183 {
2184         set_cbdata_t *cbp = data;
2185
2186         if (zfs_prop_set(zhp, cbp->cb_propname, cbp->cb_value) != 0) {
2187                 switch (libzfs_errno(g_zfs)) {
2188                 case EZFS_MOUNTFAILED:
2189                         (void) fprintf(stderr, gettext("property may be set "
2190                             "but unable to remount filesystem\n"));
2191                         break;
2192                 case EZFS_SHARENFSFAILED:
2193                         (void) fprintf(stderr, gettext("property may be set "
2194                             "but unable to reshare filesystem\n"));
2195                         break;
2196                 }
2197                 return (1);
2198         }
2199         return (0);
2200 }
2201
2202 static int
2203 zfs_do_set(int argc, char **argv)
2204 {
2205         set_cbdata_t cb;
2206         int ret;
2207
2208         /* check for options */
2209         if (argc > 1 && argv[1][0] == '-') {
2210                 (void) fprintf(stderr, gettext("invalid option '%c'\n"),
2211                     argv[1][1]);
2212                 usage(B_FALSE);
2213         }
2214
2215         /* check number of arguments */
2216         if (argc < 2) {
2217                 (void) fprintf(stderr, gettext("missing property=value "
2218                     "argument\n"));
2219                 usage(B_FALSE);
2220         }
2221         if (argc < 3) {
2222                 (void) fprintf(stderr, gettext("missing dataset name\n"));
2223                 usage(B_FALSE);
2224         }
2225
2226         /* validate property=value argument */
2227         cb.cb_propname = argv[1];
2228         if (((cb.cb_value = strchr(cb.cb_propname, '=')) == NULL) ||
2229             (cb.cb_value[1] == '\0')) {
2230                 (void) fprintf(stderr, gettext("missing value in "
2231                     "property=value argument\n"));
2232                 usage(B_FALSE);
2233         }
2234
2235         *cb.cb_value = '\0';
2236         cb.cb_value++;
2237
2238         if (*cb.cb_propname == '\0') {
2239                 (void) fprintf(stderr,
2240                     gettext("missing property in property=value argument\n"));
2241                 usage(B_FALSE);
2242         }
2243
2244         ret = zfs_for_each(argc - 2, argv + 2, NULL,
2245             ZFS_TYPE_DATASET, NULL, NULL, set_callback, &cb);
2246
2247         return (ret);
2248 }
2249
2250 /*
2251  * zfs snapshot [-r] [-o prop=value] ... <fs@snap>
2252  *
2253  * Creates a snapshot with the given name.  While functionally equivalent to
2254  * 'zfs create', it is a separate command to differentiate intent.
2255  */
2256 static int
2257 zfs_do_snapshot(int argc, char **argv)
2258 {
2259         boolean_t recursive = B_FALSE;
2260         int ret;
2261         char c;
2262         nvlist_t *props;
2263
2264         if (nvlist_alloc(&props, NV_UNIQUE_NAME, 0) != 0) {
2265                 (void) fprintf(stderr, gettext("internal error: "
2266                     "out of memory\n"));
2267                 return (1);
2268         }
2269
2270         /* check options */
2271         while ((c = getopt(argc, argv, "ro:")) != -1) {
2272                 switch (c) {
2273                 case 'o':
2274                         if (parseprop(props))
2275                                 return (1);
2276                         break;
2277                 case 'r':
2278                         recursive = B_TRUE;
2279                         break;
2280                 case '?':
2281                         (void) fprintf(stderr, gettext("invalid option '%c'\n"),
2282                             optopt);
2283                         goto usage;
2284                 }
2285         }
2286
2287         argc -= optind;
2288         argv += optind;
2289
2290         /* check number of arguments */
2291         if (argc < 1) {
2292                 (void) fprintf(stderr, gettext("missing snapshot argument\n"));
2293                 goto usage;
2294         }
2295         if (argc > 1) {
2296                 (void) fprintf(stderr, gettext("too many arguments\n"));
2297                 goto usage;
2298         }
2299
2300         ret = zfs_snapshot(g_zfs, argv[0], recursive, props);
2301         nvlist_free(props);
2302         if (ret && recursive)
2303                 (void) fprintf(stderr, gettext("no snapshots were created\n"));
2304         return (ret != 0);
2305
2306 usage:
2307         nvlist_free(props);
2308         usage(B_FALSE);
2309         return (-1);
2310 }
2311
2312 /*
2313  * zfs send [-v] -R [-i|-I <@snap>] <fs@snap>
2314  * zfs send [-v] [-i|-I <@snap>] <fs@snap>
2315  *
2316  * Send a backup stream to stdout.
2317  */
2318 static int
2319 zfs_do_send(int argc, char **argv)
2320 {
2321         char *fromname = NULL;
2322         char *toname = NULL;
2323         char *cp;
2324         zfs_handle_t *zhp;
2325         boolean_t doall = B_FALSE;
2326         boolean_t replicate = B_FALSE;
2327         boolean_t fromorigin = B_FALSE;
2328         boolean_t verbose = B_FALSE;
2329         int c, err;
2330
2331         /* check options */
2332         while ((c = getopt(argc, argv, ":i:I:Rv")) != -1) {
2333                 switch (c) {
2334                 case 'i':
2335                         if (fromname)
2336                                 usage(B_FALSE);
2337                         fromname = optarg;
2338                         break;
2339                 case 'I':
2340                         if (fromname)
2341                                 usage(B_FALSE);
2342                         fromname = optarg;
2343                         doall = B_TRUE;
2344                         break;
2345                 case 'R':
2346                         replicate = B_TRUE;
2347                         break;
2348                 case 'v':
2349                         verbose = B_TRUE;
2350                         break;
2351                 case ':':
2352                         (void) fprintf(stderr, gettext("missing argument for "
2353                             "'%c' option\n"), optopt);
2354                         usage(B_FALSE);
2355                         break;
2356                 case '?':
2357                         (void) fprintf(stderr, gettext("invalid option '%c'\n"),
2358                             optopt);
2359                         usage(B_FALSE);
2360                 }
2361         }
2362
2363         argc -= optind;
2364         argv += optind;
2365
2366         /* check number of arguments */
2367         if (argc < 1) {
2368                 (void) fprintf(stderr, gettext("missing snapshot argument\n"));
2369                 usage(B_FALSE);
2370         }
2371         if (argc > 1) {
2372                 (void) fprintf(stderr, gettext("too many arguments\n"));
2373                 usage(B_FALSE);
2374         }
2375
2376         if (isatty(STDOUT_FILENO)) {
2377                 (void) fprintf(stderr,
2378                     gettext("Error: Stream can not be written to a terminal.\n"
2379                     "You must redirect standard output.\n"));
2380                 return (1);
2381         }
2382
2383         cp = strchr(argv[0], '@');
2384         if (cp == NULL) {
2385                 (void) fprintf(stderr,
2386                     gettext("argument must be a snapshot\n"));
2387                 usage(B_FALSE);
2388         }
2389         *cp = '\0';
2390         toname = cp + 1;
2391         zhp = zfs_open(g_zfs, argv[0], ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME);
2392         if (zhp == NULL)
2393                 return (1);
2394
2395         /*
2396          * If they specified the full path to the snapshot, chop off
2397          * everything except the short name of the snapshot, but special
2398          * case if they specify the origin.
2399          */
2400         if (fromname && (cp = strchr(fromname, '@')) != NULL) {
2401                 char origin[ZFS_MAXNAMELEN];
2402                 zprop_source_t src;
2403
2404                 (void) zfs_prop_get(zhp, ZFS_PROP_ORIGIN,
2405                     origin, sizeof (origin), &src, NULL, 0, B_FALSE);
2406
2407                 if (strcmp(origin, fromname) == 0) {
2408                         fromname = NULL;
2409                         fromorigin = B_TRUE;
2410                 } else {
2411                         *cp = '\0';
2412                         if (cp != fromname && strcmp(argv[0], fromname)) {
2413                                 (void) fprintf(stderr,
2414                                     gettext("incremental source must be "
2415                                     "in same filesystem\n"));
2416                                 usage(B_FALSE);
2417                         }
2418                         fromname = cp + 1;
2419                         if (strchr(fromname, '@') || strchr(fromname, '/')) {
2420                                 (void) fprintf(stderr,
2421                                     gettext("invalid incremental source\n"));
2422                                 usage(B_FALSE);
2423                         }
2424                 }
2425         }
2426
2427         if (replicate && fromname == NULL)
2428                 doall = B_TRUE;
2429
2430         err = zfs_send(zhp, fromname, toname, replicate, doall, fromorigin,
2431             verbose, STDOUT_FILENO);
2432         zfs_close(zhp);
2433
2434         return (err != 0);
2435 }
2436
2437 /*
2438  * zfs receive [-dnvF] <fs@snap>
2439  *
2440  * Restore a backup stream from stdin.
2441  */
2442 static int
2443 zfs_do_receive(int argc, char **argv)
2444 {
2445         int c, err;
2446         recvflags_t flags;
2447
2448         bzero(&flags, sizeof (recvflags_t));
2449         /* check options */
2450         while ((c = getopt(argc, argv, ":dnvF")) != -1) {
2451                 switch (c) {
2452                 case 'd':
2453                         flags.isprefix = B_TRUE;
2454                         break;
2455                 case 'n':
2456                         flags.dryrun = B_TRUE;
2457                         break;
2458                 case 'v':
2459                         flags.verbose = B_TRUE;
2460                         break;
2461                 case 'F':
2462                         flags.force = B_TRUE;
2463                         break;
2464                 case ':':
2465                         (void) fprintf(stderr, gettext("missing argument for "
2466                             "'%c' option\n"), optopt);
2467                         usage(B_FALSE);
2468                         break;
2469                 case '?':
2470                         (void) fprintf(stderr, gettext("invalid option '%c'\n"),
2471                             optopt);
2472                         usage(B_FALSE);
2473                 }
2474         }
2475
2476         argc -= optind;
2477         argv += optind;
2478
2479         /* check number of arguments */
2480         if (argc < 1) {
2481                 (void) fprintf(stderr, gettext("missing snapshot argument\n"));
2482                 usage(B_FALSE);
2483         }
2484         if (argc > 1) {
2485                 (void) fprintf(stderr, gettext("too many arguments\n"));
2486                 usage(B_FALSE);
2487         }
2488
2489         if (isatty(STDIN_FILENO)) {
2490                 (void) fprintf(stderr,
2491                     gettext("Error: Backup stream can not be read "
2492                     "from a terminal.\n"
2493                     "You must redirect standard input.\n"));
2494                 return (1);
2495         }
2496
2497         err = zfs_receive(g_zfs, argv[0], flags, STDIN_FILENO, NULL);
2498
2499         return (err != 0);
2500 }
2501
2502 typedef struct allow_cb {
2503         int  a_permcnt;
2504         size_t a_treeoffset;
2505 } allow_cb_t;
2506
2507 static void
2508 zfs_print_perms(avl_tree_t *tree)
2509 {
2510         zfs_perm_node_t *permnode;
2511
2512         permnode = avl_first(tree);
2513         while (permnode != NULL) {
2514                 (void) printf("%s", permnode->z_pname);
2515                 permnode = AVL_NEXT(tree, permnode);
2516                 if (permnode)
2517                         (void) printf(",");
2518                 else
2519                         (void) printf("\n");
2520         }
2521 }
2522
2523 /*
2524  * Iterate over user/groups/everyone/... and the call perm_iter
2525  * function to print actual permission when tree has >0 nodes.
2526  */
2527 static void
2528 zfs_iter_perms(avl_tree_t *tree, const char *banner, allow_cb_t *cb)
2529 {
2530         zfs_allow_node_t *item;
2531         avl_tree_t *ptree;
2532
2533         item = avl_first(tree);
2534         while (item) {
2535                 ptree = (void *)((char *)item + cb->a_treeoffset);
2536                 if (avl_numnodes(ptree)) {
2537                         if (cb->a_permcnt++ == 0)
2538                                 (void) printf("%s\n", banner);
2539                         (void) printf("\t%s", item->z_key);
2540                         /*
2541                          * Avoid an extra space being printed
2542                          * for "everyone" which is keyed with a null
2543                          * string
2544                          */
2545                         if (item->z_key[0] != '\0')
2546                                 (void) printf(" ");
2547                         zfs_print_perms(ptree);
2548                 }
2549                 item = AVL_NEXT(tree, item);
2550         }
2551 }
2552
2553 #define LINES "-------------------------------------------------------------\n"
2554 static int
2555 zfs_print_allows(char *ds)
2556 {
2557         zfs_allow_t *curperms, *perms;
2558         zfs_handle_t *zhp;
2559         allow_cb_t allowcb = { 0 };
2560         char banner[MAXPATHLEN];
2561
2562         if (ds[0] == '-')
2563                 usage(B_FALSE);
2564
2565         if (strrchr(ds, '@')) {
2566                 (void) fprintf(stderr, gettext("Snapshots don't have 'allow'"
2567                     " permissions\n"));
2568                 return (1);
2569         }
2570         if ((zhp = zfs_open(g_zfs, ds, ZFS_TYPE_DATASET)) == NULL)
2571                 return (1);
2572
2573         if (zfs_perm_get(zhp, &perms)) {
2574                 (void) fprintf(stderr,
2575                     gettext("Failed to retrieve 'allows' on %s\n"), ds);
2576                 zfs_close(zhp);
2577                 return (1);
2578         }
2579
2580         zfs_close(zhp);
2581
2582         if (perms != NULL)
2583                 (void) printf("%s", LINES);
2584         for (curperms = perms; curperms; curperms = curperms->z_next) {
2585
2586                 (void) snprintf(banner, sizeof (banner),
2587                     "Permission sets on (%s)", curperms->z_setpoint);
2588                 allowcb.a_treeoffset =
2589                     offsetof(zfs_allow_node_t, z_localdescend);
2590                 allowcb.a_permcnt = 0;
2591                 zfs_iter_perms(&curperms->z_sets, banner, &allowcb);
2592
2593                 (void) snprintf(banner, sizeof (banner),
2594                     "Create time permissions on (%s)", curperms->z_setpoint);
2595                 allowcb.a_treeoffset =
2596                     offsetof(zfs_allow_node_t, z_localdescend);
2597                 allowcb.a_permcnt = 0;
2598                 zfs_iter_perms(&curperms->z_crperms, banner, &allowcb);
2599
2600
2601                 (void) snprintf(banner, sizeof (banner),
2602                     "Local permissions on (%s)", curperms->z_setpoint);
2603                 allowcb.a_treeoffset = offsetof(zfs_allow_node_t, z_local);
2604                 allowcb.a_permcnt = 0;
2605                 zfs_iter_perms(&curperms->z_user, banner, &allowcb);
2606                 zfs_iter_perms(&curperms->z_group, banner, &allowcb);
2607                 zfs_iter_perms(&curperms->z_everyone, banner, &allowcb);
2608
2609                 (void) snprintf(banner, sizeof (banner),
2610                     "Descendent permissions on (%s)", curperms->z_setpoint);
2611                 allowcb.a_treeoffset = offsetof(zfs_allow_node_t, z_descend);
2612                 allowcb.a_permcnt = 0;
2613                 zfs_iter_perms(&curperms->z_user, banner, &allowcb);
2614                 zfs_iter_perms(&curperms->z_group, banner, &allowcb);
2615                 zfs_iter_perms(&curperms->z_everyone, banner, &allowcb);
2616
2617                 (void) snprintf(banner, sizeof (banner),
2618                     "Local+Descendent permissions on (%s)",
2619                     curperms->z_setpoint);
2620                 allowcb.a_treeoffset =
2621                     offsetof(zfs_allow_node_t, z_localdescend);
2622                 allowcb.a_permcnt = 0;
2623                 zfs_iter_perms(&curperms->z_user, banner, &allowcb);
2624                 zfs_iter_perms(&curperms->z_group, banner, &allowcb);
2625                 zfs_iter_perms(&curperms->z_everyone, banner, &allowcb);
2626
2627                 (void) printf("%s", LINES);
2628         }
2629         zfs_free_allows(perms);
2630         return (0);
2631 }
2632
2633 #define ALLOWOPTIONS "ldcsu:g:e"
2634 #define UNALLOWOPTIONS "ldcsu:g:er"
2635
2636 /*
2637  * Validate options, and build necessary datastructure to display/remove/add
2638  * permissions.
2639  * Returns 0 - If permissions should be added/removed
2640  * Returns 1 - If permissions should be displayed.
2641  * Returns -1 - on failure
2642  */
2643 int
2644 parse_allow_args(int *argc, char **argv[], boolean_t unallow,
2645     char **ds, int *recurse, nvlist_t **zperms)
2646 {
2647         int c;
2648         char *options = unallow ? UNALLOWOPTIONS : ALLOWOPTIONS;
2649         zfs_deleg_inherit_t deleg_type = ZFS_DELEG_NONE;
2650         zfs_deleg_who_type_t who_type = ZFS_DELEG_WHO_UNKNOWN;
2651         char *who = NULL;
2652         char *perms = NULL;
2653         zfs_handle_t *zhp;
2654
2655         while ((c = getopt(*argc, *argv, options)) != -1) {
2656                 switch (c) {
2657                 case 'l':
2658                         if (who_type == ZFS_DELEG_CREATE ||
2659                             who_type == ZFS_DELEG_NAMED_SET)
2660                                 usage(B_FALSE);
2661
2662                         deleg_type |= ZFS_DELEG_PERM_LOCAL;
2663                         break;
2664                 case 'd':
2665                         if (who_type == ZFS_DELEG_CREATE ||
2666                             who_type == ZFS_DELEG_NAMED_SET)
2667                                 usage(B_FALSE);
2668
2669                         deleg_type |= ZFS_DELEG_PERM_DESCENDENT;
2670                         break;
2671                 case 'r':
2672                         *recurse = B_TRUE;
2673                         break;
2674                 case 'c':
2675                         if (who_type != ZFS_DELEG_WHO_UNKNOWN)
2676                                 usage(B_FALSE);
2677                         if (deleg_type)
2678                                 usage(B_FALSE);
2679                         who_type = ZFS_DELEG_CREATE;
2680                         break;
2681                 case 's':
2682                         if (who_type != ZFS_DELEG_WHO_UNKNOWN)
2683                                 usage(B_FALSE);
2684                         if (deleg_type)
2685                                 usage(B_FALSE);
2686                         who_type = ZFS_DELEG_NAMED_SET;
2687                         break;
2688                 case 'u':
2689                         if (who_type != ZFS_DELEG_WHO_UNKNOWN)
2690                                 usage(B_FALSE);
2691                         who_type = ZFS_DELEG_USER;
2692                         who = optarg;
2693                         break;
2694                 case 'g':
2695                         if (who_type != ZFS_DELEG_WHO_UNKNOWN)
2696                                 usage(B_FALSE);
2697                         who_type = ZFS_DELEG_GROUP;
2698                         who = optarg;
2699                         break;
2700                 case 'e':
2701                         if (who_type != ZFS_DELEG_WHO_UNKNOWN)
2702                                 usage(B_FALSE);
2703                         who_type = ZFS_DELEG_EVERYONE;
2704                         break;
2705                 default:
2706                         usage(B_FALSE);
2707                         break;
2708                 }
2709         }
2710
2711         if (deleg_type == 0)
2712                 deleg_type = ZFS_DELEG_PERM_LOCALDESCENDENT;
2713
2714         *argc -= optind;
2715         *argv += optind;
2716
2717         if (unallow == B_FALSE && *argc == 1) {
2718                 /*
2719                  * Only print permissions if no options were processed
2720                  */
2721                 if (optind == 1)
2722                         return (1);
2723                 else
2724                         usage(B_FALSE);
2725         }
2726
2727         /*
2728          * initialize variables for zfs_build_perms based on number
2729          * of arguments.
2730          * 3 arguments ==>      zfs [un]allow joe perm,perm,perm <dataset> or
2731          *                      zfs [un]allow -s @set1 perm,perm <dataset>
2732          * 2 arguments ==>      zfs [un]allow -c perm,perm <dataset> or
2733          *                      zfs [un]allow -u|-g <name> perm <dataset> or
2734          *                      zfs [un]allow -e perm,perm <dataset>
2735          *                      zfs unallow joe <dataset>
2736          *                      zfs unallow -s @set1 <dataset>
2737          * 1 argument  ==>      zfs [un]allow -e <dataset> or
2738          *                      zfs [un]allow -c <dataset>
2739          */
2740
2741         switch (*argc) {
2742         case 3:
2743                 perms = (*argv)[1];
2744                 who = (*argv)[0];
2745                 *ds = (*argv)[2];
2746
2747                 /*
2748                  * advance argc/argv for do_allow cases.
2749                  * for do_allow case make sure who have a know who type
2750                  * and its not a permission set.
2751                  */
2752                 if (unallow == B_TRUE) {
2753                         *argc -= 2;
2754                         *argv += 2;
2755                 } else if (who_type != ZFS_DELEG_WHO_UNKNOWN &&
2756                     who_type != ZFS_DELEG_NAMED_SET)
2757                         usage(B_FALSE);
2758                 break;
2759
2760         case 2:
2761                 if (unallow == B_TRUE && (who_type == ZFS_DELEG_EVERYONE ||
2762                     who_type == ZFS_DELEG_CREATE || who != NULL)) {
2763                         perms = (*argv)[0];
2764                         *ds = (*argv)[1];
2765                 } else {
2766                         if (unallow == B_FALSE &&
2767                             (who_type == ZFS_DELEG_WHO_UNKNOWN ||
2768                             who_type == ZFS_DELEG_NAMED_SET))
2769                                 usage(B_FALSE);
2770                         else if (who_type == ZFS_DELEG_WHO_UNKNOWN ||
2771                             who_type == ZFS_DELEG_NAMED_SET)
2772                                 who = (*argv)[0];
2773                         else if (who_type != ZFS_DELEG_NAMED_SET)
2774                                 perms = (*argv)[0];
2775                         *ds = (*argv)[1];
2776                 }
2777                 if (unallow == B_TRUE) {
2778                         (*argc)--;
2779                         (*argv)++;
2780                 }
2781                 break;
2782
2783         case 1:
2784                 if (unallow == B_FALSE)
2785                         usage(B_FALSE);
2786                 if (who == NULL && who_type != ZFS_DELEG_CREATE &&
2787                     who_type != ZFS_DELEG_EVERYONE)
2788                         usage(B_FALSE);
2789                 *ds = (*argv)[0];
2790                 break;
2791
2792         default:
2793                 usage(B_FALSE);
2794         }
2795
2796         if (strrchr(*ds, '@')) {
2797                 (void) fprintf(stderr,
2798                     gettext("Can't set or remove 'allow' permissions "
2799                     "on snapshots.\n"));
2800                         return (-1);
2801         }
2802
2803         if ((zhp = zfs_open(g_zfs, *ds, ZFS_TYPE_DATASET)) == NULL)
2804                 return (-1);
2805
2806         if ((zfs_build_perms(zhp, who, perms,
2807             who_type, deleg_type, zperms)) != 0) {
2808                 zfs_close(zhp);
2809                 return (-1);
2810         }
2811         zfs_close(zhp);
2812         return (0);
2813 }
2814
2815 static int
2816 zfs_do_allow(int argc, char **argv)
2817 {
2818         char *ds;
2819         nvlist_t *zperms = NULL;
2820         zfs_handle_t *zhp;
2821         int unused;
2822         int ret;
2823
2824         if ((ret = parse_allow_args(&argc, &argv, B_FALSE, &ds,
2825             &unused, &zperms)) == -1)
2826                 return (1);
2827
2828         if (ret == 1)
2829                 return (zfs_print_allows(argv[0]));
2830
2831         if ((zhp = zfs_open(g_zfs, ds, ZFS_TYPE_DATASET)) == NULL)
2832                 return (1);
2833
2834         if (zfs_perm_set(zhp, zperms)) {
2835                 zfs_close(zhp);
2836                 nvlist_free(zperms);
2837                 return (1);
2838         }
2839         nvlist_free(zperms);
2840         zfs_close(zhp);
2841
2842         return (0);
2843 }
2844
2845 static int
2846 unallow_callback(zfs_handle_t *zhp, void *data)
2847 {
2848         nvlist_t *nvp = (nvlist_t *)data;
2849         int error;
2850
2851         error = zfs_perm_remove(zhp, nvp);
2852         if (error) {
2853                 (void) fprintf(stderr, gettext("Failed to remove permissions "
2854                     "on %s\n"), zfs_get_name(zhp));
2855         }
2856         return (error);
2857 }
2858
2859 static int
2860 zfs_do_unallow(int argc, char **argv)
2861 {
2862         int recurse = B_FALSE;
2863         char *ds;
2864         int error;
2865         nvlist_t *zperms = NULL;
2866         int flags = 0;
2867
2868         if (parse_allow_args(&argc, &argv, B_TRUE,
2869             &ds, &recurse, &zperms) == -1)
2870                 return (1);
2871
2872         if (recurse)
2873                 flags |= ZFS_ITER_RECURSE;
2874         error = zfs_for_each(argc, argv, flags,
2875             ZFS_TYPE_FILESYSTEM|ZFS_TYPE_VOLUME, NULL,
2876             NULL, unallow_callback, (void *)zperms);
2877
2878         if (zperms)
2879                 nvlist_free(zperms);
2880
2881         return (error);
2882 }
2883
2884 typedef struct get_all_cbdata {
2885         zfs_handle_t    **cb_handles;
2886         size_t          cb_alloc;
2887         size_t          cb_used;
2888         uint_t          cb_types;
2889         boolean_t       cb_verbose;
2890 } get_all_cbdata_t;
2891
2892 #define CHECK_SPINNER 30
2893 #define SPINNER_TIME 3          /* seconds */
2894 #define MOUNT_TIME 5            /* seconds */
2895
2896 static int
2897 get_one_dataset(zfs_handle_t *zhp, void *data)
2898 {
2899         static char spin[] = { '-', '\\', '|', '/' };
2900         static int spinval = 0;
2901         static int spincheck = 0;
2902         static time_t last_spin_time = (time_t)0;
2903         get_all_cbdata_t *cbp = data;
2904         zfs_type_t type = zfs_get_type(zhp);
2905
2906         if (cbp->cb_verbose) {
2907                 if (--spincheck < 0) {
2908                         time_t now = time(NULL);
2909                         if (last_spin_time + SPINNER_TIME < now) {
2910                                 (void) printf("\b%c", spin[spinval++ % 4]);
2911                                 (void) fflush(stdout);
2912                                 last_spin_time = now;
2913                         }
2914                         spincheck = CHECK_SPINNER;
2915                 }
2916         }
2917
2918         /*
2919          * Interate over any nested datasets.
2920          */
2921         if (type == ZFS_TYPE_FILESYSTEM &&
2922             zfs_iter_filesystems(zhp, get_one_dataset, data) != 0) {
2923                 zfs_close(zhp);
2924                 return (1);
2925         }
2926
2927         /*
2928          * Skip any datasets whose type does not match.
2929          */
2930         if ((type & cbp->cb_types) == 0) {
2931                 zfs_close(zhp);
2932                 return (0);
2933         }
2934
2935         if (cbp->cb_alloc == cbp->cb_used) {
2936                 zfs_handle_t **handles;
2937
2938                 if (cbp->cb_alloc == 0)
2939                         cbp->cb_alloc = 64;
2940                 else
2941                         cbp->cb_alloc *= 2;
2942
2943                 handles = safe_malloc(cbp->cb_alloc * sizeof (void *));
2944
2945                 if (cbp->cb_handles) {
2946                         bcopy(cbp->cb_handles, handles,
2947                             cbp->cb_used * sizeof (void *));
2948                         free(cbp->cb_handles);
2949                 }
2950
2951                 cbp->cb_handles = handles;
2952         }
2953
2954         cbp->cb_handles[cbp->cb_used++] = zhp;
2955
2956         return (0);
2957 }
2958
2959 static void
2960 get_all_datasets(uint_t types, zfs_handle_t ***dslist, size_t *count,
2961     boolean_t verbose)
2962 {
2963         get_all_cbdata_t cb = { 0 };
2964         cb.cb_types = types;
2965         cb.cb_verbose = verbose;
2966
2967         if (verbose) {
2968                 (void) printf("%s: *", gettext("Reading ZFS config"));
2969                 (void) fflush(stdout);
2970         }
2971
2972         (void) zfs_iter_root(g_zfs, get_one_dataset, &cb);
2973
2974         *dslist = cb.cb_handles;
2975         *count = cb.cb_used;
2976
2977         if (verbose) {
2978                 (void) printf("\b%s\n", gettext("done."));
2979         }
2980 }
2981
2982 static int
2983 dataset_cmp(const void *a, const void *b)
2984 {
2985         zfs_handle_t **za = (zfs_handle_t **)a;
2986         zfs_handle_t **zb = (zfs_handle_t **)b;
2987         char mounta[MAXPATHLEN];
2988         char mountb[MAXPATHLEN];
2989         boolean_t gota, gotb;
2990
2991         if ((gota = (zfs_get_type(*za) == ZFS_TYPE_FILESYSTEM)) != 0)
2992                 verify(zfs_prop_get(*za, ZFS_PROP_MOUNTPOINT, mounta,
2993                     sizeof (mounta), NULL, NULL, 0, B_FALSE) == 0);
2994         if ((gotb = (zfs_get_type(*zb) == ZFS_TYPE_FILESYSTEM)) != 0)
2995                 verify(zfs_prop_get(*zb, ZFS_PROP_MOUNTPOINT, mountb,
2996                     sizeof (mountb), NULL, NULL, 0, B_FALSE) == 0);
2997
2998         if (gota && gotb)
2999                 return (strcmp(mounta, mountb));
3000
3001         if (gota)
3002                 return (-1);
3003         if (gotb)
3004                 return (1);
3005
3006         return (strcmp(zfs_get_name(a), zfs_get_name(b)));
3007 }
3008
3009 /*
3010  * Generic callback for sharing or mounting filesystems.  Because the code is so
3011  * similar, we have a common function with an extra parameter to determine which
3012  * mode we are using.
3013  */
3014 #define OP_SHARE        0x1
3015 #define OP_MOUNT        0x2
3016
3017 /*
3018  * Share or mount a dataset.
3019  */
3020 static int
3021 share_mount_one(zfs_handle_t *zhp, int op, int flags, char *protocol,
3022     boolean_t explicit, const char *options)
3023 {
3024         char mountpoint[ZFS_MAXPROPLEN];
3025         char shareopts[ZFS_MAXPROPLEN];
3026         char smbshareopts[ZFS_MAXPROPLEN];
3027         const char *cmdname = op == OP_SHARE ? "share" : "mount";
3028         struct mnttab mnt;
3029         uint64_t zoned, canmount;
3030         zfs_type_t type = zfs_get_type(zhp);
3031         boolean_t shared_nfs, shared_smb;
3032
3033         assert(type & (ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME));
3034
3035         if (type == ZFS_TYPE_FILESYSTEM) {
3036                 /*
3037                  * Check to make sure we can mount/share this dataset.  If we
3038                  * are in the global zone and the filesystem is exported to a
3039                  * local zone, or if we are in a local zone and the
3040                  * filesystem is not exported, then it is an error.
3041                  */
3042                 zoned = zfs_prop_get_int(zhp, ZFS_PROP_ZONED);
3043
3044                 if (zoned && getzoneid() == GLOBAL_ZONEID) {
3045                         if (!explicit)
3046                                 return (0);
3047
3048                         (void) fprintf(stderr, gettext("cannot %s '%s': "
3049                             "dataset is exported to a local zone\n"), cmdname,
3050                             zfs_get_name(zhp));
3051                         return (1);
3052
3053                 } else if (!zoned && getzoneid() != GLOBAL_ZONEID) {
3054                         if (!explicit)
3055                                 return (0);
3056
3057                         (void) fprintf(stderr, gettext("cannot %s '%s': "
3058                             "permission denied\n"), cmdname,
3059                             zfs_get_name(zhp));
3060                         return (1);
3061                 }
3062
3063                 /*
3064                  * Ignore any filesystems which don't apply to us. This
3065                  * includes those with a legacy mountpoint, or those with
3066                  * legacy share options.
3067                  */
3068                 verify(zfs_prop_get(zhp, ZFS_PROP_MOUNTPOINT, mountpoint,
3069                     sizeof (mountpoint), NULL, NULL, 0, B_FALSE) == 0);
3070                 verify(zfs_prop_get(zhp, ZFS_PROP_SHARENFS, shareopts,
3071                     sizeof (shareopts), NULL, NULL, 0, B_FALSE) == 0);
3072                 verify(zfs_prop_get(zhp, ZFS_PROP_SHARESMB, smbshareopts,
3073                     sizeof (smbshareopts), NULL, NULL, 0, B_FALSE) == 0);
3074                 canmount = zfs_prop_get_int(zhp, ZFS_PROP_CANMOUNT);
3075
3076                 if (op == OP_SHARE && strcmp(shareopts, "off") == 0 &&
3077                     strcmp(smbshareopts, "off") == 0) {
3078                         if (!explicit)
3079                                 return (0);
3080
3081                         (void) fprintf(stderr, gettext("cannot share '%s': "
3082                             "legacy share\n"), zfs_get_name(zhp));
3083                         (void) fprintf(stderr, gettext("use share(1M) to "
3084                             "share this filesystem\n"));
3085                         return (1);
3086                 }
3087
3088                 /*
3089                  * We cannot share or mount legacy filesystems. If the
3090                  * shareopts is non-legacy but the mountpoint is legacy, we
3091                  * treat it as a legacy share.
3092                  */
3093                 if (strcmp(mountpoint, "legacy") == 0) {
3094                         if (!explicit)
3095                                 return (0);
3096
3097                         (void) fprintf(stderr, gettext("cannot %s '%s': "
3098                             "legacy mountpoint\n"), cmdname, zfs_get_name(zhp));
3099                         (void) fprintf(stderr, gettext("use %s(1M) to "
3100                             "%s this filesystem\n"), cmdname, cmdname);
3101                         return (1);
3102                 }
3103
3104                 if (strcmp(mountpoint, "none") == 0) {
3105                         if (!explicit)
3106                                 return (0);
3107
3108                         (void) fprintf(stderr, gettext("cannot %s '%s': no "
3109                             "mountpoint set\n"), cmdname, zfs_get_name(zhp));
3110                         return (1);
3111                 }
3112
3113                 /*
3114                  * canmount     explicit        outcome
3115                  * on           no              pass through
3116                  * on           yes             pass through
3117                  * off          no              return 0
3118                  * off          yes             display error, return 1
3119                  * noauto       no              return 0
3120                  * noauto       yes             pass through
3121                  */
3122                 if (canmount == ZFS_CANMOUNT_OFF) {
3123                         if (!explicit)
3124                                 return (0);
3125
3126                         (void) fprintf(stderr, gettext("cannot %s '%s': "
3127                             "'canmount' property is set to 'off'\n"), cmdname,
3128                             zfs_get_name(zhp));
3129                         return (1);
3130                 } else if (canmount == ZFS_CANMOUNT_NOAUTO && !explicit) {
3131                         return (0);
3132                 }
3133
3134                 /*
3135                  * At this point, we have verified that the mountpoint and/or
3136                  * shareopts are appropriate for auto management. If the
3137                  * filesystem is already mounted or shared, return (failing
3138                  * for explicit requests); otherwise mount or share the
3139                  * filesystem.
3140                  */
3141                 switch (op) {
3142                 case OP_SHARE:
3143
3144                         shared_nfs = zfs_is_shared_nfs(zhp, NULL);
3145                         shared_smb = zfs_is_shared_smb(zhp, NULL);
3146
3147                         if (shared_nfs && shared_smb ||
3148                             (shared_nfs && strcmp(shareopts, "on") == 0 &&
3149                             strcmp(smbshareopts, "off") == 0) ||
3150                             (shared_smb && strcmp(smbshareopts, "on") == 0 &&
3151                             strcmp(shareopts, "off") == 0)) {
3152                                 if (!explicit)
3153                                         return (0);
3154
3155                                 (void) fprintf(stderr, gettext("cannot share "
3156                                     "'%s': filesystem already shared\n"),
3157                                     zfs_get_name(zhp));
3158                                 return (1);
3159                         }
3160
3161                         if (!zfs_is_mounted(zhp, NULL) &&
3162                             zfs_mount(zhp, NULL, 0) != 0)
3163                                 return (1);
3164
3165                         if (protocol == NULL) {
3166                                 if (zfs_shareall(zhp) != 0)
3167                                         return (1);
3168                         } else if (strcmp(protocol, "nfs") == 0) {
3169                                 if (zfs_share_nfs(zhp))
3170                                         return (1);
3171                         } else if (strcmp(protocol, "smb") == 0) {
3172                                 if (zfs_share_smb(zhp))
3173                                         return (1);
3174                         } else {
3175                                 (void) fprintf(stderr, gettext("cannot share "
3176                                     "'%s': invalid share type '%s' "
3177                                     "specified\n"),
3178                                     zfs_get_name(zhp), protocol);
3179                                 return (1);
3180                         }
3181
3182                         break;
3183
3184                 case OP_MOUNT:
3185                         if (options == NULL)
3186                                 mnt.mnt_mntopts = "";
3187                         else
3188                                 mnt.mnt_mntopts = (char *)options;
3189
3190                         if (!hasmntopt(&mnt, MNTOPT_REMOUNT) &&
3191                             zfs_is_mounted(zhp, NULL)) {
3192                                 if (!explicit)
3193                                         return (0);
3194
3195                                 (void) fprintf(stderr, gettext("cannot mount "
3196                                     "'%s': filesystem already mounted\n"),
3197                                     zfs_get_name(zhp));
3198                                 return (1);
3199                         }
3200
3201                         if (zfs_mount(zhp, options, flags) != 0)
3202                                 return (1);
3203                         break;
3204                 }
3205         } else {
3206                 assert(op == OP_SHARE);
3207
3208                 /*
3209                  * Ignore any volumes that aren't shared.
3210                  */
3211                 verify(zfs_prop_get(zhp, ZFS_PROP_SHAREISCSI, shareopts,
3212                     sizeof (shareopts), NULL, NULL, 0, B_FALSE) == 0);
3213
3214                 if (strcmp(shareopts, "off") == 0) {
3215                         if (!explicit)
3216                                 return (0);
3217
3218                         (void) fprintf(stderr, gettext("cannot share '%s': "
3219                             "'shareiscsi' property not set\n"),
3220                             zfs_get_name(zhp));
3221                         (void) fprintf(stderr, gettext("set 'shareiscsi' "
3222                             "property or use iscsitadm(1M) to share this "
3223                             "volume\n"));
3224                         return (1);
3225                 }
3226
3227                 if (zfs_is_shared_iscsi(zhp)) {
3228                         if (!explicit)
3229                                 return (0);
3230
3231                         (void) fprintf(stderr, gettext("cannot share "
3232                             "'%s': volume already shared\n"),
3233                             zfs_get_name(zhp));
3234                         return (1);
3235                 }
3236
3237                 if (zfs_share_iscsi(zhp) != 0)
3238                         return (1);
3239         }
3240
3241         return (0);
3242 }
3243
3244 /*
3245  * Reports progress in the form "(current/total)".  Not thread-safe.
3246  */
3247 static void
3248 report_mount_progress(int current, int total)
3249 {
3250         static int len;
3251         static char *reverse = "\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b"
3252             "\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b";
3253         static time_t last_progress_time;
3254         time_t now = time(NULL);
3255
3256         /* report 1..n instead of 0..n-1 */
3257         ++current;
3258
3259         /* display header if we're here for the first time */
3260         if (current == 1) {
3261                 (void) printf(gettext("Mounting ZFS filesystems: "));
3262                 len = 0;
3263         } else if (current != total && last_progress_time + MOUNT_TIME >= now) {
3264                 /* too soon to report again */
3265                 return;
3266         }
3267
3268         last_progress_time = now;
3269
3270         /* back up to prepare for overwriting */
3271         if (len)
3272                 (void) printf("%*.*s", len, len, reverse);
3273
3274         /* We put a newline at the end if this is the last one.  */
3275         len = printf("(%d/%d)%s", current, total, current == total ? "\n" : "");
3276         (void) fflush(stdout);
3277 }
3278
3279 static void
3280 append_options(char *mntopts, char *newopts)
3281 {
3282         int len = strlen(mntopts);
3283
3284         /* original length plus new string to append plus 1 for the comma */
3285         if (len + 1 + strlen(newopts) >= MNT_LINE_MAX) {
3286                 (void) fprintf(stderr, gettext("the opts argument for "
3287                     "'%c' option is too long (more than %d chars)\n"),
3288                     "-o", MNT_LINE_MAX);
3289                 usage(B_FALSE);
3290         }
3291
3292         if (*mntopts)
3293                 mntopts[len++] = ',';
3294
3295         (void) strcpy(&mntopts[len], newopts);
3296 }
3297
3298 static int
3299 share_mount(int op, int argc, char **argv)
3300 {
3301         int do_all = 0;
3302         boolean_t verbose = B_FALSE;
3303         int c, ret = 0;
3304         char *options = NULL;
3305         int types, flags = 0;
3306
3307         /* check options */
3308         while ((c = getopt(argc, argv, op == OP_MOUNT ? ":avo:O" : "a"))
3309             != -1) {
3310                 switch (c) {
3311                 case 'a':
3312                         do_all = 1;
3313                         break;
3314                 case 'v':
3315                         verbose = B_TRUE;
3316                         break;
3317                 case 'o':
3318                         if (*optarg == '\0') {
3319                                 (void) fprintf(stderr, gettext("empty mount "
3320                                     "options (-o) specified\n"));
3321                                 usage(B_FALSE);
3322                         }
3323
3324                         if (options == NULL)
3325                                 options = safe_malloc(MNT_LINE_MAX + 1);
3326
3327                         /* option validation is done later */
3328                         append_options(options, optarg);
3329                         break;
3330
3331                 case 'O':
3332                         flags |= MS_OVERLAY;
3333                         break;
3334                 case ':':
3335                         (void) fprintf(stderr, gettext("missing argument for "
3336                             "'%c' option\n"), optopt);
3337                         usage(B_FALSE);
3338                         break;
3339                 case '?':
3340                         (void) fprintf(stderr, gettext("invalid option '%c'\n"),
3341                             optopt);
3342                         usage(B_FALSE);
3343                 }
3344         }
3345
3346         argc -= optind;
3347         argv += optind;
3348
3349         /* check number of arguments */
3350         if (do_all) {
3351                 zfs_handle_t **dslist = NULL;
3352                 size_t i, count = 0;
3353                 char *protocol = NULL;
3354
3355                 if (op == OP_MOUNT) {
3356                         types = ZFS_TYPE_FILESYSTEM;
3357                 } else if (argc > 0) {
3358                         if (strcmp(argv[0], "nfs") == 0 ||
3359                             strcmp(argv[0], "smb") == 0) {
3360                                 types = ZFS_TYPE_FILESYSTEM;
3361                         } else if (strcmp(argv[0], "iscsi") == 0) {
3362                                 types = ZFS_TYPE_VOLUME;
3363                         } else {
3364                                 (void) fprintf(stderr, gettext("share type "
3365                                     "must be 'nfs', 'smb' or 'iscsi'\n"));
3366                                 usage(B_FALSE);
3367                         }
3368                         protocol = argv[0];
3369                         argc--;
3370                         argv++;
3371                 } else {
3372                         types = ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME;
3373                 }
3374
3375                 if (argc != 0) {
3376                         (void) fprintf(stderr, gettext("too many arguments\n"));
3377                         usage(B_FALSE);
3378                 }
3379
3380                 get_all_datasets(types, &dslist, &count, verbose);
3381
3382                 if (count == 0)
3383                         return (0);
3384
3385                 qsort(dslist, count, sizeof (void *), dataset_cmp);
3386
3387                 for (i = 0; i < count; i++) {
3388                         if (verbose)
3389                                 report_mount_progress(i, count);
3390
3391                         if (share_mount_one(dslist[i], op, flags, protocol,
3392                             B_FALSE, options) != 0)
3393                                 ret = 1;
3394                         zfs_close(dslist[i]);
3395                 }
3396
3397                 free(dslist);
3398         } else if (argc == 0) {
3399                 struct mnttab entry;
3400
3401                 if ((op == OP_SHARE) || (options != NULL)) {
3402                         (void) fprintf(stderr, gettext("missing filesystem "
3403                             "argument (specify -a for all)\n"));
3404                         usage(B_FALSE);
3405                 }
3406
3407                 /*
3408                  * When mount is given no arguments, go through /etc/mnttab and
3409                  * display any active ZFS mounts.  We hide any snapshots, since
3410                  * they are controlled automatically.
3411                  */
3412                 rewind(mnttab_file);
3413                 while (getmntent(mnttab_file, &entry) == 0) {
3414                         if (strcmp(entry.mnt_fstype, MNTTYPE_ZFS) != 0 ||
3415                             strchr(entry.mnt_special, '@') != NULL)
3416                                 continue;
3417
3418                         (void) printf("%-30s  %s\n", entry.mnt_special,
3419                             entry.mnt_mountp);
3420                 }
3421
3422         } else {
3423                 zfs_handle_t *zhp;
3424
3425                 types = ZFS_TYPE_FILESYSTEM;
3426                 if (op == OP_SHARE)
3427                         types |= ZFS_TYPE_VOLUME;
3428
3429                 if (argc > 1) {
3430                         (void) fprintf(stderr,
3431                             gettext("too many arguments\n"));
3432                         usage(B_FALSE);
3433                 }
3434
3435                 if ((zhp = zfs_open(g_zfs, argv[0], types)) == NULL) {
3436                         ret = 1;
3437                 } else {
3438                         ret = share_mount_one(zhp, op, flags, NULL, B_TRUE,
3439                             options);
3440                         zfs_close(zhp);
3441                 }
3442         }
3443
3444         return (ret);
3445 }
3446
3447 /*
3448  * zfs mount -a [nfs | iscsi]
3449  * zfs mount filesystem
3450  *
3451  * Mount all filesystems, or mount the given filesystem.
3452  */
3453 static int
3454 zfs_do_mount(int argc, char **argv)
3455 {
3456         return (share_mount(OP_MOUNT, argc, argv));
3457 }
3458
3459 /*
3460  * zfs share -a [nfs | iscsi | smb]
3461  * zfs share filesystem
3462  *
3463  * Share all filesystems, or share the given filesystem.
3464  */
3465 static int
3466 zfs_do_share(int argc, char **argv)
3467 {
3468         return (share_mount(OP_SHARE, argc, argv));
3469 }
3470
3471 typedef struct unshare_unmount_node {
3472         zfs_handle_t    *un_zhp;
3473         char            *un_mountp;
3474         uu_avl_node_t   un_avlnode;
3475 } unshare_unmount_node_t;
3476
3477 /* ARGSUSED */
3478 static int
3479 unshare_unmount_compare(const void *larg, const void *rarg, void *unused)
3480 {
3481         const unshare_unmount_node_t *l = larg;
3482         const unshare_unmount_node_t *r = rarg;
3483
3484         return (strcmp(l->un_mountp, r->un_mountp));
3485 }
3486
3487 /*
3488  * Convenience routine used by zfs_do_umount() and manual_unmount().  Given an
3489  * absolute path, find the entry /etc/mnttab, verify that its a ZFS filesystem,
3490  * and unmount it appropriately.
3491  */
3492 static int
3493 unshare_unmount_path(int op, char *path, int flags, boolean_t is_manual)
3494 {
3495         zfs_handle_t *zhp;
3496         int ret;
3497         struct stat64 statbuf;
3498         struct extmnttab entry;
3499         const char *cmdname = (op == OP_SHARE) ? "unshare" : "unmount";
3500         ino_t path_inode;
3501
3502         /*
3503          * Search for the path in /etc/mnttab.  Rather than looking for the
3504          * specific path, which can be fooled by non-standard paths (i.e. ".."
3505          * or "//"), we stat() the path and search for the corresponding
3506          * (major,minor) device pair.
3507          */
3508         if (stat64(path, &statbuf) != 0) {
3509                 (void) fprintf(stderr, gettext("cannot %s '%s': %s\n"),
3510                     cmdname, path, strerror(errno));
3511                 return (1);
3512         }
3513         path_inode = statbuf.st_ino;
3514
3515         /*
3516          * Search for the given (major,minor) pair in the mount table.
3517          */
3518         rewind(mnttab_file);
3519         while ((ret = getextmntent(mnttab_file, &entry, 0)) == 0) {
3520                 if (entry.mnt_major == major(statbuf.st_dev) &&
3521                     entry.mnt_minor == minor(statbuf.st_dev))
3522                         break;
3523         }
3524         if (ret != 0) {
3525                 if (op == OP_SHARE) {
3526                         (void) fprintf(stderr, gettext("cannot %s '%s': not "
3527                             "currently mounted\n"), cmdname, path);
3528                         return (1);
3529                 }
3530                 (void) fprintf(stderr, gettext("warning: %s not in mnttab\n"),
3531                     path);
3532                 if ((ret = umount2(path, flags)) != 0)
3533                         (void) fprintf(stderr, gettext("%s: %s\n"), path,
3534                             strerror(errno));
3535                 return (ret != 0);
3536         }
3537
3538         if (strcmp(entry.mnt_fstype, MNTTYPE_ZFS) != 0) {
3539                 (void) fprintf(stderr, gettext("cannot %s '%s': not a ZFS "
3540                     "filesystem\n"), cmdname, path);
3541                 return (1);
3542         }
3543
3544         if ((zhp = zfs_open(g_zfs, entry.mnt_special,
3545             ZFS_TYPE_FILESYSTEM)) == NULL)
3546                 return (1);
3547
3548         ret = 1;
3549         if (stat64(entry.mnt_mountp, &statbuf) != 0) {
3550                 (void) fprintf(stderr, gettext("cannot %s '%s': %s\n"),
3551                     cmdname, path, strerror(errno));
3552                 goto out;
3553         } else if (statbuf.st_ino != path_inode) {
3554                 (void) fprintf(stderr, gettext("cannot "
3555                     "%s '%s': not a mountpoint\n"), cmdname, path);
3556                 goto out;
3557         }
3558
3559         if (op == OP_SHARE) {
3560                 char nfs_mnt_prop[ZFS_MAXPROPLEN];
3561                 char smbshare_prop[ZFS_MAXPROPLEN];
3562
3563                 verify(zfs_prop_get(zhp, ZFS_PROP_SHARENFS, nfs_mnt_prop,
3564                     sizeof (nfs_mnt_prop), NULL, NULL, 0, B_FALSE) == 0);
3565                 verify(zfs_prop_get(zhp, ZFS_PROP_SHARESMB, smbshare_prop,
3566                     sizeof (smbshare_prop), NULL, NULL, 0, B_FALSE) == 0);
3567
3568                 if (strcmp(nfs_mnt_prop, "off") == 0 &&
3569                     strcmp(smbshare_prop, "off") == 0) {
3570                         (void) fprintf(stderr, gettext("cannot unshare "
3571                             "'%s': legacy share\n"), path);
3572                         (void) fprintf(stderr, gettext("use "
3573                             "unshare(1M) to unshare this filesystem\n"));
3574                 } else if (!zfs_is_shared(zhp)) {
3575                         (void) fprintf(stderr, gettext("cannot unshare '%s': "
3576                             "not currently shared\n"), path);
3577                 } else {
3578                         ret = zfs_unshareall_bypath(zhp, path);
3579                 }
3580         } else {
3581                 char mtpt_prop[ZFS_MAXPROPLEN];
3582
3583                 verify(zfs_prop_get(zhp, ZFS_PROP_MOUNTPOINT, mtpt_prop,
3584                     sizeof (mtpt_prop), NULL, NULL, 0, B_FALSE) == 0);
3585
3586                 if (is_manual) {
3587                         ret = zfs_unmount(zhp, NULL, flags);
3588                 } else if (strcmp(mtpt_prop, "legacy") == 0) {
3589                         (void) fprintf(stderr, gettext("cannot unmount "
3590                             "'%s': legacy mountpoint\n"),
3591                             zfs_get_name(zhp));
3592                         (void) fprintf(stderr, gettext("use umount(1M) "
3593                             "to unmount this filesystem\n"));
3594                 } else {
3595                         ret = zfs_unmountall(zhp, flags);
3596                 }
3597         }
3598
3599 out:
3600         zfs_close(zhp);
3601
3602         return (ret != 0);
3603 }
3604
3605 /*
3606  * Generic callback for unsharing or unmounting a filesystem.
3607  */
3608 static int
3609 unshare_unmount(int op, int argc, char **argv)
3610 {
3611         int do_all = 0;
3612         int flags = 0;
3613         int ret = 0;
3614         int types, c;
3615         zfs_handle_t *zhp;
3616         char nfsiscsi_mnt_prop[ZFS_MAXPROPLEN];
3617         char sharesmb[ZFS_MAXPROPLEN];
3618
3619         /* check options */
3620         while ((c = getopt(argc, argv, op == OP_SHARE ? "a" : "af")) != -1) {
3621                 switch (c) {
3622                 case 'a':
3623                         do_all = 1;
3624                         break;
3625                 case 'f':
3626                         flags = MS_FORCE;
3627                         break;
3628                 case '?':
3629                         (void) fprintf(stderr, gettext("invalid option '%c'\n"),
3630                             optopt);
3631                         usage(B_FALSE);
3632                 }
3633         }
3634
3635         argc -= optind;
3636         argv += optind;
3637
3638         if (do_all) {
3639                 /*
3640                  * We could make use of zfs_for_each() to walk all datasets in
3641                  * the system, but this would be very inefficient, especially
3642                  * since we would have to linearly search /etc/mnttab for each
3643                  * one.  Instead, do one pass through /etc/mnttab looking for
3644                  * zfs entries and call zfs_unmount() for each one.
3645                  *
3646                  * Things get a little tricky if the administrator has created
3647                  * mountpoints beneath other ZFS filesystems.  In this case, we
3648                  * have to unmount the deepest filesystems first.  To accomplish
3649                  * this, we place all the mountpoints in an AVL tree sorted by
3650                  * the special type (dataset name), and walk the result in
3651                  * reverse to make sure to get any snapshots first.
3652                  */
3653                 struct mnttab entry;
3654                 uu_avl_pool_t *pool;
3655                 uu_avl_t *tree;
3656                 unshare_unmount_node_t *node;
3657                 uu_avl_index_t idx;
3658                 uu_avl_walk_t *walk;
3659
3660                 if (argc != 0) {
3661                         (void) fprintf(stderr, gettext("too many arguments\n"));
3662                         usage(B_FALSE);
3663                 }
3664
3665                 if ((pool = uu_avl_pool_create("unmount_pool",
3666                     sizeof (unshare_unmount_node_t),
3667                     offsetof(unshare_unmount_node_t, un_avlnode),
3668                     unshare_unmount_compare,
3669                     UU_DEFAULT)) == NULL) {
3670                         (void) fprintf(stderr, gettext("internal error: "
3671                             "out of memory\n"));
3672                         exit(1);
3673                 }
3674
3675                 if ((tree = uu_avl_create(pool, NULL, UU_DEFAULT)) == NULL) {
3676                         (void) fprintf(stderr, gettext("internal error: "
3677                             "out of memory\n"));
3678                         exit(1);
3679                 }
3680
3681                 rewind(mnttab_file);
3682                 while (getmntent(mnttab_file, &entry) == 0) {
3683
3684                         /* ignore non-ZFS entries */
3685                         if (strcmp(entry.mnt_fstype, MNTTYPE_ZFS) != 0)
3686                                 continue;
3687
3688                         /* ignore snapshots */
3689                         if (strchr(entry.mnt_special, '@') != NULL)
3690                                 continue;
3691
3692                         if ((zhp = zfs_open(g_zfs, entry.mnt_special,
3693                             ZFS_TYPE_FILESYSTEM)) == NULL) {
3694                                 ret = 1;
3695                                 continue;
3696                         }
3697
3698                         switch (op) {
3699                         case OP_SHARE:
3700                                 verify(zfs_prop_get(zhp, ZFS_PROP_SHARENFS,
3701                                     nfsiscsi_mnt_prop,
3702                                     sizeof (nfsiscsi_mnt_prop),
3703                                     NULL, NULL, 0, B_FALSE) == 0);
3704                                 if (strcmp(nfsiscsi_mnt_prop, "off") != 0)
3705                                         break;
3706                                 verify(zfs_prop_get(zhp, ZFS_PROP_SHARESMB,
3707                                     nfsiscsi_mnt_prop,
3708                                     sizeof (nfsiscsi_mnt_prop),
3709                                     NULL, NULL, 0, B_FALSE) == 0);
3710                                 if (strcmp(nfsiscsi_mnt_prop, "off") == 0)
3711                                         continue;
3712                                 break;
3713                         case OP_MOUNT:
3714                                 /* Ignore legacy mounts */
3715                                 verify(zfs_prop_get(zhp, ZFS_PROP_MOUNTPOINT,
3716                                     nfsiscsi_mnt_prop,
3717                                     sizeof (nfsiscsi_mnt_prop),
3718                                     NULL, NULL, 0, B_FALSE) == 0);
3719                                 if (strcmp(nfsiscsi_mnt_prop, "legacy") == 0)
3720                                         continue;
3721                                 /* Ignore canmount=noauto mounts */
3722                                 if (zfs_prop_get_int(zhp, ZFS_PROP_CANMOUNT) ==
3723                                     ZFS_CANMOUNT_NOAUTO)
3724                                         continue;
3725                         default:
3726                                 break;
3727                         }
3728
3729                         node = safe_malloc(sizeof (unshare_unmount_node_t));
3730                         node->un_zhp = zhp;
3731
3732                         if ((node->un_mountp = strdup(entry.mnt_mountp)) ==
3733                             NULL) {
3734                                 (void) fprintf(stderr, gettext("internal error:"
3735                                     " out of memory\n"));
3736                                 exit(1);
3737                         }
3738
3739                         uu_avl_node_init(node, &node->un_avlnode, pool);
3740
3741                         if (uu_avl_find(tree, node, NULL, &idx) == NULL) {
3742                                 uu_avl_insert(tree, node, idx);
3743                         } else {
3744                                 zfs_close(node->un_zhp);
3745                                 free(node->un_mountp);
3746                                 free(node);
3747                         }
3748                 }
3749
3750                 /*
3751                  * Walk the AVL tree in reverse, unmounting each filesystem and
3752                  * removing it from the AVL tree in the process.
3753                  */
3754                 if ((walk = uu_avl_walk_start(tree,
3755                     UU_WALK_REVERSE | UU_WALK_ROBUST)) == NULL) {
3756                         (void) fprintf(stderr,
3757                             gettext("internal error: out of memory"));
3758                         exit(1);
3759                 }
3760
3761                 while ((node = uu_avl_walk_next(walk)) != NULL) {
3762                         uu_avl_remove(tree, node);
3763
3764                         switch (op) {
3765                         case OP_SHARE:
3766                                 if (zfs_unshareall_bypath(node->un_zhp,
3767                                     node->un_mountp) != 0)
3768                                         ret = 1;
3769                                 break;
3770
3771                         case OP_MOUNT:
3772                                 if (zfs_unmount(node->un_zhp,
3773                                     node->un_mountp, flags) != 0)
3774                                         ret = 1;
3775                                 break;
3776                         }
3777
3778                         zfs_close(node->un_zhp);
3779                         free(node->un_mountp);
3780                         free(node);
3781                 }
3782
3783                 uu_avl_walk_end(walk);
3784                 uu_avl_destroy(tree);
3785                 uu_avl_pool_destroy(pool);
3786
3787                 if (op == OP_SHARE) {
3788                         /*
3789                          * Finally, unshare any volumes shared via iSCSI.
3790                          */
3791                         zfs_handle_t **dslist = NULL;
3792                         size_t i, count = 0;
3793
3794                         get_all_datasets(ZFS_TYPE_VOLUME, &dslist, &count,
3795                             B_FALSE);
3796
3797                         if (count != 0) {
3798                                 qsort(dslist, count, sizeof (void *),
3799                                     dataset_cmp);
3800
3801                                 for (i = 0; i < count; i++) {
3802                                         if (zfs_unshare_iscsi(dslist[i]) != 0)
3803                                                 ret = 1;
3804                                         zfs_close(dslist[i]);
3805                                 }
3806
3807                                 free(dslist);
3808                         }
3809                 }
3810         } else {
3811                 if (argc != 1) {
3812                         if (argc == 0)
3813                                 (void) fprintf(stderr,
3814                                     gettext("missing filesystem argument\n"));
3815                         else
3816                                 (void) fprintf(stderr,
3817                                     gettext("too many arguments\n"));
3818                         usage(B_FALSE);
3819                 }
3820
3821                 /*
3822                  * We have an argument, but it may be a full path or a ZFS
3823                  * filesystem.  Pass full paths off to unmount_path() (shared by
3824                  * manual_unmount), otherwise open the filesystem and pass to
3825                  * zfs_unmount().
3826                  */
3827                 if (argv[0][0] == '/')
3828                         return (unshare_unmount_path(op, argv[0],
3829                             flags, B_FALSE));
3830
3831                 types = ZFS_TYPE_FILESYSTEM;
3832                 if (op == OP_SHARE)
3833                         types |= ZFS_TYPE_VOLUME;
3834
3835                 if ((zhp = zfs_open(g_zfs, argv[0], types)) == NULL)
3836                         return (1);
3837
3838                 if (zfs_get_type(zhp) == ZFS_TYPE_FILESYSTEM) {
3839                         verify(zfs_prop_get(zhp, op == OP_SHARE ?
3840                             ZFS_PROP_SHARENFS : ZFS_PROP_MOUNTPOINT,
3841                             nfsiscsi_mnt_prop, sizeof (nfsiscsi_mnt_prop), NULL,
3842                             NULL, 0, B_FALSE) == 0);
3843
3844                         switch (op) {
3845                         case OP_SHARE:
3846                                 verify(zfs_prop_get(zhp, ZFS_PROP_SHARENFS,
3847                                     nfsiscsi_mnt_prop,
3848                                     sizeof (nfsiscsi_mnt_prop),
3849                                     NULL, NULL, 0, B_FALSE) == 0);
3850                                 verify(zfs_prop_get(zhp, ZFS_PROP_SHARESMB,
3851                                     sharesmb, sizeof (sharesmb), NULL, NULL,
3852                                     0, B_FALSE) == 0);
3853
3854                                 if (strcmp(nfsiscsi_mnt_prop, "off") == 0 &&
3855                                     strcmp(sharesmb, "off") == 0) {
3856                                         (void) fprintf(stderr, gettext("cannot "
3857                                             "unshare '%s': legacy share\n"),
3858                                             zfs_get_name(zhp));
3859                                         (void) fprintf(stderr, gettext("use "
3860                                             "unshare(1M) to unshare this "
3861                                             "filesystem\n"));
3862                                         ret = 1;
3863                                 } else if (!zfs_is_shared(zhp)) {
3864                                         (void) fprintf(stderr, gettext("cannot "
3865                                             "unshare '%s': not currently "
3866                                             "shared\n"), zfs_get_name(zhp));
3867                                         ret = 1;
3868                                 } else if (zfs_unshareall(zhp) != 0) {
3869                                         ret = 1;
3870                                 }
3871                                 break;
3872
3873                         case OP_MOUNT:
3874                                 if (strcmp(nfsiscsi_mnt_prop, "legacy") == 0) {
3875                                         (void) fprintf(stderr, gettext("cannot "
3876                                             "unmount '%s': legacy "
3877                                             "mountpoint\n"), zfs_get_name(zhp));
3878                                         (void) fprintf(stderr, gettext("use "
3879                                             "umount(1M) to unmount this "
3880                                             "filesystem\n"));
3881                                         ret = 1;
3882                                 } else if (!zfs_is_mounted(zhp, NULL)) {
3883                                         (void) fprintf(stderr, gettext("cannot "
3884                                             "unmount '%s': not currently "
3885                                             "mounted\n"),
3886                                             zfs_get_name(zhp));
3887                                         ret = 1;
3888                                 } else if (zfs_unmountall(zhp, flags) != 0) {
3889                                         ret = 1;
3890                                 }
3891                                 break;
3892                         }
3893                 } else {
3894                         assert(op == OP_SHARE);
3895
3896                         verify(zfs_prop_get(zhp, ZFS_PROP_SHAREISCSI,
3897                             nfsiscsi_mnt_prop, sizeof (nfsiscsi_mnt_prop),
3898                             NULL, NULL, 0, B_FALSE) == 0);
3899
3900                         if (strcmp(nfsiscsi_mnt_prop, "off") == 0) {
3901                                 (void) fprintf(stderr, gettext("cannot unshare "
3902                                     "'%s': 'shareiscsi' property not set\n"),
3903                                     zfs_get_name(zhp));
3904                                 (void) fprintf(stderr, gettext("set "
3905                                     "'shareiscsi' property or use "
3906                                     "iscsitadm(1M) to share this volume\n"));
3907                                 ret = 1;
3908                         } else if (!zfs_is_shared_iscsi(zhp)) {
3909                                 (void) fprintf(stderr, gettext("cannot "
3910                                     "unshare '%s': not currently shared\n"),
3911                                     zfs_get_name(zhp));
3912                                 ret = 1;
3913                         } else if (zfs_unshare_iscsi(zhp) != 0) {
3914                                 ret = 1;
3915                         }
3916                 }
3917
3918                 zfs_close(zhp);
3919         }
3920
3921         return (ret);
3922 }
3923
3924 /*
3925  * zfs unmount -a
3926  * zfs unmount filesystem
3927  *
3928  * Unmount all filesystems, or a specific ZFS filesystem.
3929  */
3930 static int
3931 zfs_do_unmount(int argc, char **argv)
3932 {
3933         return (unshare_unmount(OP_MOUNT, argc, argv));
3934 }
3935
3936 /*
3937  * zfs unshare -a
3938  * zfs unshare filesystem
3939  *
3940  * Unshare all filesystems, or a specific ZFS filesystem.
3941  */
3942 static int
3943 zfs_do_unshare(int argc, char **argv)
3944 {
3945         return (unshare_unmount(OP_SHARE, argc, argv));
3946 }
3947
3948 /*
3949  * Called when invoked as /etc/fs/zfs/mount.  Do the mount if the mountpoint is
3950  * 'legacy'.  Otherwise, complain that use should be using 'zfs mount'.
3951  */
3952 static int
3953 manual_mount(int argc, char **argv)
3954 {
3955         zfs_handle_t *zhp;
3956         char mountpoint[ZFS_MAXPROPLEN];
3957         char mntopts[MNT_LINE_MAX] = { '\0' };
3958         int ret;
3959         int c;
3960         int flags = 0;
3961         char *dataset, *path;
3962
3963         /* check options */
3964         while ((c = getopt(argc, argv, ":mo:O")) != -1) {
3965                 switch (c) {
3966                 case 'o':
3967                         (void) strlcpy(mntopts, optarg, sizeof (mntopts));
3968                         break;
3969                 case 'O':
3970                         flags |= MS_OVERLAY;
3971                         break;
3972                 case 'm':
3973                         flags |= MS_NOMNTTAB;
3974                         break;
3975                 case ':':
3976                         (void) fprintf(stderr, gettext("missing argument for "
3977                             "'%c' option\n"), optopt);
3978                         usage(B_FALSE);
3979                         break;
3980                 case '?':
3981                         (void) fprintf(stderr, gettext("invalid option '%c'\n"),
3982                             optopt);
3983                         (void) fprintf(stderr, gettext("usage: mount [-o opts] "
3984                             "<path>\n"));
3985                         return (2);
3986                 }
3987         }
3988
3989         argc -= optind;
3990         argv += optind;
3991
3992         /* check that we only have two arguments */
3993         if (argc != 2) {
3994                 if (argc == 0)
3995                         (void) fprintf(stderr, gettext("missing dataset "
3996                             "argument\n"));
3997                 else if (argc == 1)
3998                         (void) fprintf(stderr,
3999                             gettext("missing mountpoint argument\n"));
4000                 else
4001                         (void) fprintf(stderr, gettext("too many arguments\n"));
4002                 (void) fprintf(stderr, "usage: mount <dataset> <mountpoint>\n");
4003                 return (2);
4004         }
4005
4006         dataset = argv[0];
4007         path = argv[1];
4008
4009         /* try to open the dataset */
4010         if ((zhp = zfs_open(g_zfs, dataset, ZFS_TYPE_FILESYSTEM)) == NULL)
4011                 return (1);
4012
4013         (void) zfs_prop_get(zhp, ZFS_PROP_MOUNTPOINT, mountpoint,
4014             sizeof (mountpoint), NULL, NULL, 0, B_FALSE);
4015
4016         /* check for legacy mountpoint and complain appropriately */
4017         ret = 0;
4018         if (strcmp(mountpoint, ZFS_MOUNTPOINT_LEGACY) == 0) {
4019                 if (mount(dataset, path, MS_OPTIONSTR | flags, MNTTYPE_ZFS,
4020                     NULL, 0, mntopts, sizeof (mntopts)) != 0) {
4021                         (void) fprintf(stderr, gettext("mount failed: %s\n"),
4022                             strerror(errno));
4023                         ret = 1;
4024                 }
4025         } else {
4026                 (void) fprintf(stderr, gettext("filesystem '%s' cannot be "
4027                     "mounted using 'mount -F zfs'\n"), dataset);
4028                 (void) fprintf(stderr, gettext("Use 'zfs set mountpoint=%s' "
4029                     "instead.\n"), path);
4030                 (void) fprintf(stderr, gettext("If you must use 'mount -F zfs' "
4031                     "or /etc/vfstab, use 'zfs set mountpoint=legacy'.\n"));
4032                 (void) fprintf(stderr, gettext("See zfs(1M) for more "
4033                     "information.\n"));
4034                 ret = 1;
4035         }
4036
4037         return (ret);
4038 }
4039
4040 /*
4041  * Called when invoked as /etc/fs/zfs/umount.  Unlike a manual mount, we allow
4042  * unmounts of non-legacy filesystems, as this is the dominant administrative
4043  * interface.
4044  */
4045 static int
4046 manual_unmount(int argc, char **argv)
4047 {
4048         int flags = 0;
4049         int c;
4050
4051         /* check options */
4052         while ((c = getopt(argc, argv, "f")) != -1) {
4053                 switch (c) {
4054                 case 'f':
4055                         flags = MS_FORCE;
4056                         break;
4057                 case '?':
4058                         (void) fprintf(stderr, gettext("invalid option '%c'\n"),
4059                             optopt);
4060                         (void) fprintf(stderr, gettext("usage: unmount [-f] "
4061                             "<path>\n"));
4062                         return (2);
4063                 }
4064         }
4065
4066         argc -= optind;
4067         argv += optind;
4068
4069         /* check arguments */
4070         if (argc != 1) {
4071                 if (argc == 0)
4072                         (void) fprintf(stderr, gettext("missing path "
4073                             "argument\n"));
4074                 else
4075                         (void) fprintf(stderr, gettext("too many arguments\n"));
4076                 (void) fprintf(stderr, gettext("usage: unmount [-f] <path>\n"));
4077                 return (2);
4078         }
4079
4080         return (unshare_unmount_path(OP_MOUNT, argv[0], flags, B_TRUE));
4081 }
4082
4083 static int
4084 volcheck(zpool_handle_t *zhp, void *data)
4085 {
4086         boolean_t isinit = *((boolean_t *)data);
4087
4088         if (isinit)
4089                 return (zpool_create_zvol_links(zhp));
4090         else
4091                 return (zpool_remove_zvol_links(zhp));
4092 }
4093
4094 /*
4095  * Iterate over all pools in the system and either create or destroy /dev/zvol
4096  * links, depending on the value of 'isinit'.
4097  */
4098 static int
4099 do_volcheck(boolean_t isinit)
4100 {
4101         return (zpool_iter(g_zfs, volcheck, &isinit) ? 1 : 0);
4102 }
4103
4104 static int
4105 find_command_idx(char *command, int *idx)
4106 {
4107         int i;
4108
4109         for (i = 0; i < NCOMMAND; i++) {
4110                 if (command_table[i].name == NULL)
4111                         continue;
4112
4113                 if (strcmp(command, command_table[i].name) == 0) {
4114                         *idx = i;
4115                         return (0);
4116                 }
4117         }
4118         return (1);
4119 }
4120
4121 int
4122 main(int argc, char **argv)
4123 {
4124         int ret;
4125         int i;
4126         char *progname;
4127         char *cmdname;
4128
4129         (void) setlocale(LC_ALL, "");
4130         (void) textdomain(TEXT_DOMAIN);
4131
4132         opterr = 0;
4133
4134         if ((g_zfs = libzfs_init()) == NULL) {
4135                 (void) fprintf(stderr, gettext("internal error: failed to "
4136                     "initialize ZFS library\n"));
4137                 return (1);
4138         }
4139
4140         zpool_set_history_str("zfs", argc, argv, history_str);
4141         verify(zpool_stage_history(g_zfs, history_str) == 0);
4142
4143         libzfs_print_on_error(g_zfs, B_TRUE);
4144
4145         if ((mnttab_file = fopen(MNTTAB, "r")) == NULL) {
4146                 (void) fprintf(stderr, gettext("internal error: unable to "
4147                     "open %s\n"), MNTTAB);
4148                 return (1);
4149         }
4150
4151         /*
4152          * This command also doubles as the /etc/fs mount and unmount program.
4153          * Determine if we should take this behavior based on argv[0].
4154          */
4155         progname = basename(argv[0]);
4156         if (strcmp(progname, "mount") == 0) {
4157                 ret = manual_mount(argc, argv);
4158         } else if (strcmp(progname, "umount") == 0) {
4159                 ret = manual_unmount(argc, argv);
4160         } else {
4161                 /*
4162                  * Make sure the user has specified some command.
4163                  */
4164                 if (argc < 2) {
4165                         (void) fprintf(stderr, gettext("missing command\n"));
4166                         usage(B_FALSE);
4167                 }
4168
4169                 cmdname = argv[1];
4170
4171                 /*
4172                  * The 'umount' command is an alias for 'unmount'
4173                  */
4174                 if (strcmp(cmdname, "umount") == 0)
4175                         cmdname = "unmount";
4176
4177                 /*
4178                  * The 'recv' command is an alias for 'receive'
4179                  */
4180                 if (strcmp(cmdname, "recv") == 0)
4181                         cmdname = "receive";
4182
4183                 /*
4184                  * Special case '-?'
4185                  */
4186                 if (strcmp(cmdname, "-?") == 0)
4187                         usage(B_TRUE);
4188
4189                 /*
4190                  * 'volinit' and 'volfini' do not appear in the usage message,
4191                  * so we have to special case them here.
4192                  */
4193                 if (strcmp(cmdname, "volinit") == 0)
4194                         return (do_volcheck(B_TRUE));
4195                 else if (strcmp(cmdname, "volfini") == 0)
4196                         return (do_volcheck(B_FALSE));
4197
4198                 /*
4199                  * Run the appropriate command.
4200                  */
4201                 if (find_command_idx(cmdname, &i) == 0) {
4202                         current_command = &command_table[i];
4203                         ret = command_table[i].func(argc - 1, argv + 1);
4204                 } else if (strchr(cmdname, '=') != NULL) {
4205                         verify(find_command_idx("set", &i) == 0);
4206                         current_command = &command_table[i];
4207                         ret = command_table[i].func(argc, argv);
4208                 } else {
4209                         (void) fprintf(stderr, gettext("unrecognized "
4210                             "command '%s'\n"), cmdname);
4211                         usage(B_FALSE);
4212                 }
4213         }
4214
4215         (void) fclose(mnttab_file);
4216
4217         libzfs_fini(g_zfs);
4218
4219         /*
4220          * The 'ZFS_ABORT' environment variable causes us to dump core on exit
4221          * for the purposes of running ::findleaks.
4222          */
4223         if (getenv("ZFS_ABORT") != NULL) {
4224                 (void) printf("dumping core by request\n");
4225                 abort();
4226         }
4227
4228         return (ret);
4229 }