zfs/zcmd/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 #pragma ident   "@(#)zfs_main.c 1.58    08/03/24 SMI"
  28
  29 #include <assert.h>
  30 #include <ctype.h>
  31 #include <errno.h>
  32 #include <libgen.h>
  33 #include <libintl.h>
  34 #include <libuutil.h>
  35 #include <libnvpair.h>
  36 #include <locale.h>
  37 #include <stddef.h>
  38 #include <stdio.h>
  39 #include <stdlib.h>
  40 #include <strings.h>
  41 #include <unistd.h>
  42 #include <fcntl.h>
  43 #include <zone.h>
  44 #include <sys/mkdev.h>
  45 #include <sys/mntent.h>
  46 #include <sys/mnttab.h>
  47 #include <sys/mount.h>
  48 #include <sys/stat.h>
  49 #include <sys/avl.h>
  50
  51 #include <libzfs.h>
  52 #include <libuutil.h>
  53
  54 #include "zfs_iter.h"
  55 #include "zfs_util.h"
  56
  57 libzfs_handle_t *g_zfs;
  58
  59 static FILE *mnttab_file;
  60 static char history_str[HIS_MAX_RECORD_LEN];
  61
  62 static int zfs_do_clone(int argc, char **argv);
  63 static int zfs_do_create(int argc, char **argv);
  64 static int zfs_do_destroy(int argc, char **argv);
  65 static int zfs_do_get(int argc, char **argv);
  66 static int zfs_do_inherit(int argc, char **argv);
  67 static int zfs_do_list(int argc, char **argv);
  68 static int zfs_do_mount(int argc, char **argv);
  69 static int zfs_do_rename(int argc, char **argv);
  70 static int zfs_do_rollback(int argc, char **argv);
  71 static int zfs_do_set(int argc, char **argv);
  72 static int zfs_do_upgrade(int argc, char **argv);
  73 static int zfs_do_snapshot(int argc, char **argv);
  74 static int zfs_do_unmount(int argc, char **argv);
  75 static int zfs_do_share(int argc, char **argv);
  76 static int zfs_do_unshare(int argc, char **argv);
  77 static int zfs_do_send(int argc, char **argv);
  78 static int zfs_do_receive(int argc, char **argv);
  79 static int zfs_do_promote(int argc, char **argv);
  80 static int zfs_do_allow(int argc, char **argv);
  81 static int zfs_do_unallow(int argc, char **argv);
  82
  83 /*
  84  * These libumem hooks provide a reasonable set of defaults for the allocator's
  85  * debugging facilities.
  86  */
  87 const char *
  88 _umem_debug_init(void)
  89 {
  90         return ("default,verbose"); /* $UMEM_DEBUG setting */
  91 }
  92
  93 const char *
  94 _umem_logging_init(void)
  95 {
  96         return ("fail,contents"); /* $UMEM_LOGGING setting */
  97 }
  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] <snapshot> "
 177                     "<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> ...\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> ...\n"));
 223         case HELP_SHARE:
 224                 return (gettext("\tshare <-a | filesystem>\n"));
 225         case HELP_SNAPSHOT:
 226                 return (gettext("\tsnapshot [-r] "
 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%-14s ", zfs_prop_to_name(prop));
 285
 286         if (prop == ZFS_PROP_CASE)
 287                 (void) fprintf(fp, "NO    ");
 288         else if (zfs_prop_readonly(prop))
 289                 (void) fprintf(fp, "  NO    ");
 290         else
 291                 (void) fprintf(fp, " YES    ");
 292
 293         if (zfs_prop_inheritable(prop))
 294                 (void) fprintf(fp, "  YES   ");
 295         else
 296                 (void) fprintf(fp, "   NO   ");
 297
 298         if (zfs_prop_values(prop) == NULL)
 299                 (void) fprintf(fp, "-\n");
 300         else
 301                 (void) fprintf(fp, "%s\n", zfs_prop_values(prop));
 302
 303         return (ZPROP_CONT);
 304 }
 305
 306 /*
 307  * Display usage message.  If we're inside a command, display only the usage for
 308  * that command.  Otherwise, iterate over the entire command table and display
 309  * a complete usage message.
 310  */
 311 static void
 312 usage(boolean_t requested)
 313 {
 314         int i;
 315         boolean_t show_properties = B_FALSE;
 316         boolean_t show_permissions = B_FALSE;
 317         FILE *fp = requested ? stdout : stderr;
 318
 319         if (current_command == NULL) {
 320
 321                 (void) fprintf(fp, gettext("usage: zfs command args ...\n"));
 322                 (void) fprintf(fp,
 323                     gettext("where 'command' is one of the following:\n\n"));
 324
 325                 for (i = 0; i < NCOMMAND; i++) {
 326                         if (command_table[i].name == NULL)
 327                                 (void) fprintf(fp, "\n");
 328                         else
 329                                 (void) fprintf(fp, "%s",
 330                                     get_usage(command_table[i].usage));
 331                 }
 332
 333                 (void) fprintf(fp, gettext("\nEach dataset is of the form: "
 334                     "pool/[dataset/]*dataset[@name]\n"));
 335         } else {
 336                 (void) fprintf(fp, gettext("usage:\n"));
 337                 (void) fprintf(fp, "%s", get_usage(current_command->usage));
 338         }
 339
 340         if (current_command != NULL &&
 341             (strcmp(current_command->name, "set") == 0 ||
 342             strcmp(current_command->name, "get") == 0 ||
 343             strcmp(current_command->name, "inherit") == 0 ||
 344             strcmp(current_command->name, "list") == 0))
 345                 show_properties = B_TRUE;
 346
 347         if (current_command != NULL &&
 348             (strcmp(current_command->name, "allow") == 0 ||
 349             strcmp(current_command->name, "unallow") == 0))
 350                 show_permissions = B_TRUE;
 351
 352         if (show_properties) {
 353
 354                 (void) fprintf(fp,
 355                     gettext("\nThe following properties are supported:\n"));
 356
 357                 (void) fprintf(fp, "\n\t%-14s %s  %s   %s\n\n",
 358                     "PROPERTY", "EDIT", "INHERIT", "VALUES");
 359
 360                 /* Iterate over all properties */
 361                 (void) zprop_iter(usage_prop_cb, fp, B_FALSE, B_TRUE,
 362                     ZFS_TYPE_DATASET);
 363
 364                 (void) fprintf(fp, gettext("\nSizes are specified in bytes "
 365                     "with standard units such as K, M, G, etc.\n"));
 366                 (void) fprintf(fp, gettext("\n\nUser-defined properties can "
 367                     "be specified by using a name containing a colon (:).\n"));
 368
 369         } else if (show_permissions) {
 370                 (void) fprintf(fp,
 371                     gettext("\nThe following permissions are supported:\n"));
 372
 373                 zfs_deleg_permissions();
 374         } else {
 375                 /*
 376                  * TRANSLATION NOTE:
 377                  * "zfs set|get" must not be localised this is the
 378                  * command name and arguments.
 379                  */
 380
 381                 (void) fprintf(fp,
 382                     gettext("\nFor the property list, run: zfs set|get\n"));
 383
 384                 (void) fprintf(fp,
 385                     gettext("\nFor the delegated permission list, run:"
 386                     " zfs allow|unallow\n"));
 387         }
 388
 389         /*
 390          * See comments at end of main().
 391          */
 392         if (getenv("ZFS_ABORT") != NULL) {
 393                 (void) printf("dumping core by request\n");
 394                 abort();
 395         }
 396
 397         exit(requested ? 0 : 2);
 398 }
 399
 400 /*
 401  * zfs clone [-p] <snap> <fs | vol>
 402  *
 403  * Given an existing dataset, create a writable copy whose initial contents
 404  * are the same as the source.  The newly created dataset maintains a
 405  * dependency on the original; the original cannot be destroyed so long as
 406  * the clone exists.
 407  *
 408  * The '-p' flag creates all the non-existing ancestors of the target first.
 409  */
 410 static int
 411 zfs_do_clone(int argc, char **argv)
 412 {
 413         zfs_handle_t *zhp;
 414         boolean_t parents = B_FALSE;
 415         int ret;
 416         int c;
 417
 418         /* check options */
 419         while ((c = getopt(argc, argv, "p")) != -1) {
 420                 switch (c) {
 421                 case 'p':
 422                         parents = B_TRUE;
 423                         break;
 424                 case '?':
 425                         (void) fprintf(stderr, gettext("invalid option '%c'\n"),
 426                             optopt);
 427                         usage(B_FALSE);
 428                 }
 429         }
 430
 431         argc -= optind;
 432         argv += optind;
 433
 434         /* check number of arguments */
 435         if (argc < 1) {
 436                 (void) fprintf(stderr, gettext("missing source dataset "
 437                     "argument\n"));
 438                 usage(B_FALSE);
 439         }
 440         if (argc < 2) {
 441                 (void) fprintf(stderr, gettext("missing target dataset "
 442                     "argument\n"));
 443                 usage(B_FALSE);
 444         }
 445         if (argc > 2) {
 446                 (void) fprintf(stderr, gettext("too many arguments\n"));
 447                 usage(B_FALSE);
 448         }
 449
 450         /* open the source dataset */
 451         if ((zhp = zfs_open(g_zfs, argv[0], ZFS_TYPE_SNAPSHOT)) == NULL)
 452                 return (1);
 453
 454         if (parents && zfs_name_valid(argv[1], ZFS_TYPE_FILESYSTEM |
 455             ZFS_TYPE_VOLUME)) {
 456                 /*
 457                  * Now create the ancestors of the target dataset.  If the
 458                  * target already exists and '-p' option was used we should not
 459                  * complain.
 460                  */
 461                 if (zfs_dataset_exists(g_zfs, argv[1], ZFS_TYPE_FILESYSTEM |
 462                     ZFS_TYPE_VOLUME))
 463                         return (0);
 464                 if (zfs_create_ancestors(g_zfs, argv[1]) != 0)
 465                         return (1);
 466         }
 467
 468         /* pass to libzfs */
 469         ret = zfs_clone(zhp, argv[1], NULL);
 470
 471         /* create the mountpoint if necessary */
 472         if (ret == 0) {
 473                 zfs_handle_t *clone;
 474
 475                 clone = zfs_open(g_zfs, argv[1], ZFS_TYPE_DATASET);
 476                 if (clone != NULL) {
 477                         if ((ret = zfs_mount(clone, NULL, 0)) == 0)
 478                                 ret = zfs_share(clone);
 479                         zfs_close(clone);
 480                 }
 481         }
 482
 483         zfs_close(zhp);
 484
 485         return (ret == 0 ? 0 : 1);
 486 }
 487
 488 /*
 489  * zfs create [-p] [-o prop=value] ... fs
 490  * zfs create [-ps] [-b blocksize] [-o prop=value] ... -V vol size
 491  *
 492  * Create a new dataset.  This command can be used to create filesystems
 493  * and volumes.  Snapshot creation is handled by 'zfs snapshot'.
 494  * For volumes, the user must specify a size to be used.
 495  *
 496  * The '-s' flag applies only to volumes, and indicates that we should not try
 497  * to set the reservation for this volume.  By default we set a reservation
 498  * equal to the size for any volume.  For pools with SPA_VERSION >=
 499  * SPA_VERSION_REFRESERVATION, we set a refreservation instead.
 500  *
 501  * The '-p' flag creates all the non-existing ancestors of the target first.
 502  */
 503 static int
 504 zfs_do_create(int argc, char **argv)
 505 {
 506         zfs_type_t type = ZFS_TYPE_FILESYSTEM;
 507         zfs_handle_t *zhp = NULL;
 508         uint64_t volsize;
 509         int c;
 510         boolean_t noreserve = B_FALSE;
 511         boolean_t bflag = B_FALSE;
 512         boolean_t parents = B_FALSE;
 513         int ret = 1;
 514         nvlist_t *props = NULL;
 515         uint64_t intval;
 516         char *propname;
 517         char *propval = NULL;
 518         char *strval;
 519         int canmount;
 520
 521         if (nvlist_alloc(&props, NV_UNIQUE_NAME, 0) != 0) {
 522                 (void) fprintf(stderr, gettext("internal error: "
 523                     "out of memory\n"));
 524                 return (1);
 525         }
 526
 527         /* check options */
 528         while ((c = getopt(argc, argv, ":V:b:so:p")) != -1) {
 529                 switch (c) {
 530                 case 'V':
 531                         type = ZFS_TYPE_VOLUME;
 532                         if (zfs_nicestrtonum(g_zfs, optarg, &intval) != 0) {
 533                                 (void) fprintf(stderr, gettext("bad volume "
 534                                     "size '%s': %s\n"), optarg,
 535                                     libzfs_error_description(g_zfs));
 536                                 goto error;
 537                         }
 538
 539                         if (nvlist_add_uint64(props,
 540                             zfs_prop_to_name(ZFS_PROP_VOLSIZE),
 541                             intval) != 0) {
 542                                 (void) fprintf(stderr, gettext("internal "
 543                                     "error: out of memory\n"));
 544                                 goto error;
 545                         }
 546                         volsize = intval;
 547                         break;
 548                 case 'p':
 549                         parents = B_TRUE;
 550                         break;
 551                 case 'b':
 552                         bflag = B_TRUE;
 553                         if (zfs_nicestrtonum(g_zfs, optarg, &intval) != 0) {
 554                                 (void) fprintf(stderr, gettext("bad volume "
 555                                     "block size '%s': %s\n"), optarg,
 556                                     libzfs_error_description(g_zfs));
 557                                 goto error;
 558                         }
 559
 560                         if (nvlist_add_uint64(props,
 561                             zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE),
 562                             intval) != 0) {
 563                                 (void) fprintf(stderr, gettext("internal "
 564                                     "error: out of memory\n"));
 565                                 goto error;
 566                         }
 567                         break;
 568                 case 'o':
 569                         propname = optarg;
 570                         if ((propval = strchr(propname, '=')) == NULL) {
 571                                 (void) fprintf(stderr, gettext("missing "
 572                                     "'=' for -o option\n"));
 573                                 goto error;
 574                         }
 575                         *propval = '\0';
 576                         propval++;
 577                         if (nvlist_lookup_string(props, propname,
 578                             &strval) == 0) {
 579                                 (void) fprintf(stderr, gettext("property '%s' "
 580                                     "specified multiple times\n"), propname);
 581                                 goto error;
 582                         }
 583                         if (nvlist_add_string(props, propname, propval) != 0) {
 584                                 (void) fprintf(stderr, gettext("internal "
 585                                     "error: out of memory\n"));
 586                                 goto error;
 587                         }
 588                         break;
 589                 case 's':
 590                         noreserve = B_TRUE;
 591                         break;
 592                 case ':':
 593                         (void) fprintf(stderr, gettext("missing size "
 594                             "argument\n"));
 595                         goto badusage;
 596                         break;
 597                 case '?':
 598                         (void) fprintf(stderr, gettext("invalid option '%c'\n"),
 599                             optopt);
 600                         goto badusage;
 601                 }
 602         }
 603
 604         if ((bflag || noreserve) && type != ZFS_TYPE_VOLUME) {
 605                 (void) fprintf(stderr, gettext("'-s' and '-b' can only be "
 606                     "used when creating a volume\n"));
 607                 goto badusage;
 608         }
 609
 610         argc -= optind;
 611         argv += optind;
 612
 613         /* check number of arguments */
 614         if (argc == 0) {
 615                 (void) fprintf(stderr, gettext("missing %s argument\n"),
 616                     zfs_type_to_name(type));
 617                 goto badusage;
 618         }
 619         if (argc > 1) {
 620                 (void) fprintf(stderr, gettext("too many arguments\n"));
 621                 goto badusage;
 622         }
 623
 624         if (type == ZFS_TYPE_VOLUME && !noreserve) {
 625                 zpool_handle_t *zpool_handle;
 626                 uint64_t spa_version;
 627                 char *p;
 628                 zfs_prop_t resv_prop;
 629
 630                 if (p = strchr(argv[0], '/'))
 631                         *p = '\0';
 632                 zpool_handle = zpool_open(g_zfs, argv[0]);
 633                 if (p != NULL)
 634                         *p = '/';
 635                 if (zpool_handle == NULL)
 636                         goto error;
 637                 spa_version = zpool_get_prop_int(zpool_handle,
 638                     ZPOOL_PROP_VERSION, NULL);
 639                 zpool_close(zpool_handle);
 640                 if (spa_version >= SPA_VERSION_REFRESERVATION)
 641                         resv_prop = ZFS_PROP_REFRESERVATION;
 642                 else
 643                         resv_prop = ZFS_PROP_RESERVATION;
 644
 645                 if (nvlist_lookup_string(props, zfs_prop_to_name(resv_prop),
 646                     &strval) != 0) {
 647                         if (nvlist_add_uint64(props,
 648                             zfs_prop_to_name(resv_prop), volsize) != 0) {
 649                                 (void) fprintf(stderr, gettext("internal "
 650                                     "error: out of memory\n"));
 651                                 nvlist_free(props);
 652                                 return (1);
 653                         }
 654                 }
 655         }
 656
 657         if (parents && zfs_name_valid(argv[0], type)) {
 658                 /*
 659                  * Now create the ancestors of target dataset.  If the target
 660                  * already exists and '-p' option was used we should not
 661                  * complain.
 662                  */
 663                 if (zfs_dataset_exists(g_zfs, argv[0], type)) {
 664                         ret = 0;
 665                         goto error;
 666                 }
 667                 if (zfs_create_ancestors(g_zfs, argv[0]) != 0)
 668                         goto error;
 669         }
 670
 671         /* pass to libzfs */
 672         if (zfs_create(g_zfs, argv[0], type, props) != 0)
 673                 goto error;
 674
 675         if ((zhp = zfs_open(g_zfs, argv[0], ZFS_TYPE_DATASET)) == NULL)
 676                 goto error;
 677         /*
 678          * if the user doesn't want the dataset automatically mounted,
 679          * then skip the mount/share step
 680          */
 681
 682         canmount = zfs_prop_get_int(zhp, ZFS_PROP_CANMOUNT);
 683
 684         /*
 685          * Mount and/or share the new filesystem as appropriate.  We provide a
 686          * verbose error message to let the user know that their filesystem was
 687          * in fact created, even if we failed to mount or share it.
 688          */
 689         ret = 0;
 690         if (canmount == ZFS_CANMOUNT_ON) {
 691                 if (zfs_mount(zhp, NULL, 0) != 0) {
 692                         (void) fprintf(stderr, gettext("filesystem "
 693                             "successfully created, but not mounted\n"));
 694                         ret = 1;
 695                 } else if (zfs_share(zhp) != 0) {
 696                         (void) fprintf(stderr, gettext("filesystem "
 697                             "successfully created, but not shared\n"));
 698                         ret = 1;
 699                 }
 700         }
 701
 702 error:
 703         if (zhp)
 704                 zfs_close(zhp);
 705         nvlist_free(props);
 706         return (ret);
 707 badusage:
 708         nvlist_free(props);
 709         usage(B_FALSE);
 710         return (2);
 711 }
 712
 713 /*
 714  * zfs destroy [-rf] <fs, snap, vol>
 715  *
 716  *      -r      Recursively destroy all children
 717  *      -R      Recursively destroy all dependents, including clones
 718  *      -f      Force unmounting of any dependents
 719  *
 720  * Destroys the given dataset.  By default, it will unmount any filesystems,
 721  * and refuse to destroy a dataset that has any dependents.  A dependent can
 722  * either be a child, or a clone of a child.
 723  */
 724 typedef struct destroy_cbdata {
 725         boolean_t       cb_first;
 726         int             cb_force;
 727         int             cb_recurse;
 728         int             cb_error;
 729         int             cb_needforce;
 730         int             cb_doclones;
 731         boolean_t       cb_closezhp;
 732         zfs_handle_t    *cb_target;
 733         char            *cb_snapname;
 734 } destroy_cbdata_t;
 735
 736 /*
 737  * Check for any dependents based on the '-r' or '-R' flags.
 738  */
 739 static int
 740 destroy_check_dependent(zfs_handle_t *zhp, void *data)
 741 {
 742         destroy_cbdata_t *cbp = data;
 743         const char *tname = zfs_get_name(cbp->cb_target);
 744         const char *name = zfs_get_name(zhp);
 745
 746         if (strncmp(tname, name, strlen(tname)) == 0 &&
 747             (name[strlen(tname)] == '/' || name[strlen(tname)] == '@')) {
 748                 /*
 749                  * This is a direct descendant, not a clone somewhere else in
 750                  * the hierarchy.
 751                  */
 752                 if (cbp->cb_recurse)
 753                         goto out;
 754
 755                 if (cbp->cb_first) {
 756                         (void) fprintf(stderr, gettext("cannot destroy '%s': "
 757                             "%s has children\n"),
 758                             zfs_get_name(cbp->cb_target),
 759                             zfs_type_to_name(zfs_get_type(cbp->cb_target)));
 760                         (void) fprintf(stderr, gettext("use '-r' to destroy "
 761                             "the following datasets:\n"));
 762                         cbp->cb_first = B_FALSE;
 763                         cbp->cb_error = 1;
 764                 }
 765
 766                 (void) fprintf(stderr, "%s\n", zfs_get_name(zhp));
 767         } else {
 768                 /*
 769                  * This is a clone.  We only want to report this if the '-r'
 770                  * wasn't specified, or the target is a snapshot.
 771                  */
 772                 if (!cbp->cb_recurse &&
 773                     zfs_get_type(cbp->cb_target) != ZFS_TYPE_SNAPSHOT)
 774                         goto out;
 775
 776                 if (cbp->cb_first) {
 777                         (void) fprintf(stderr, gettext("cannot destroy '%s': "
 778                             "%s has dependent clones\n"),
 779                             zfs_get_name(cbp->cb_target),
 780                             zfs_type_to_name(zfs_get_type(cbp->cb_target)));
 781                         (void) fprintf(stderr, gettext("use '-R' to destroy "
 782                             "the following datasets:\n"));
 783                         cbp->cb_first = B_FALSE;
 784                         cbp->cb_error = 1;
 785                 }
 786
 787                 (void) fprintf(stderr, "%s\n", zfs_get_name(zhp));
 788         }
 789
 790 out:
 791         zfs_close(zhp);
 792         return (0);
 793 }
 794
 795 static int
 796 destroy_callback(zfs_handle_t *zhp, void *data)
 797 {
 798         destroy_cbdata_t *cbp = data;
 799
 800         /*
 801          * Ignore pools (which we've already flagged as an error before getting
 802          * here.
 803          */
 804         if (strchr(zfs_get_name(zhp), '/') == NULL &&
 805             zfs_get_type(zhp) == ZFS_TYPE_FILESYSTEM) {
 806                 zfs_close(zhp);
 807                 return (0);
 808         }
 809
 810         /*
 811          * Bail out on the first error.
 812          */
 813         if (zfs_unmount(zhp, NULL, cbp->cb_force ? MS_FORCE : 0) != 0 ||
 814             zfs_destroy(zhp) != 0) {
 815                 zfs_close(zhp);
 816                 return (-1);
 817         }
 818
 819         zfs_close(zhp);
 820         return (0);
 821 }
 822
 823 static int
 824 destroy_snap_clones(zfs_handle_t *zhp, void *arg)
 825 {
 826         destroy_cbdata_t *cbp = arg;
 827         char thissnap[MAXPATHLEN];
 828         zfs_handle_t *szhp;
 829         boolean_t closezhp = cbp->cb_closezhp;
 830         int rv;
 831
 832         (void) snprintf(thissnap, sizeof (thissnap),
 833             "%s@%s", zfs_get_name(zhp), cbp->cb_snapname);
 834
 835         libzfs_print_on_error(g_zfs, B_FALSE);
 836         szhp = zfs_open(g_zfs, thissnap, ZFS_TYPE_SNAPSHOT);
 837         libzfs_print_on_error(g_zfs, B_TRUE);
 838         if (szhp) {
 839                 /*
 840                  * Destroy any clones of this snapshot
 841                  */
 842                 if (zfs_iter_dependents(szhp, B_FALSE, destroy_callback,
 843                     cbp) != 0) {
 844                         zfs_close(szhp);
 845                         if (closezhp)
 846                                 zfs_close(zhp);
 847                         return (-1);
 848                 }
 849                 zfs_close(szhp);
 850         }
 851
 852         cbp->cb_closezhp = B_TRUE;
 853         rv = zfs_iter_filesystems(zhp, destroy_snap_clones, arg);
 854         if (closezhp)
 855                 zfs_close(zhp);
 856         return (rv);
 857 }
 858
 859 static int
 860 zfs_do_destroy(int argc, char **argv)
 861 {
 862         destroy_cbdata_t cb = { 0 };
 863         int c;
 864         zfs_handle_t *zhp;
 865         char *cp;
 866
 867         /* check options */
 868         while ((c = getopt(argc, argv, "frR")) != -1) {
 869                 switch (c) {
 870                 case 'f':
 871                         cb.cb_force = 1;
 872                         break;
 873                 case 'r':
 874                         cb.cb_recurse = 1;
 875                         break;
 876                 case 'R':
 877                         cb.cb_recurse = 1;
 878                         cb.cb_doclones = 1;
 879                         break;
 880                 case '?':
 881                 default:
 882                         (void) fprintf(stderr, gettext("invalid option '%c'\n"),
 883                             optopt);
 884                         usage(B_FALSE);
 885                 }
 886         }
 887
 888         argc -= optind;
 889         argv += optind;
 890
 891         /* check number of arguments */
 892         if (argc == 0) {
 893                 (void) fprintf(stderr, gettext("missing path argument\n"));
 894                 usage(B_FALSE);
 895         }
 896         if (argc > 1) {
 897                 (void) fprintf(stderr, gettext("too many arguments\n"));
 898                 usage(B_FALSE);
 899         }
 900
 901         /*
 902          * If we are doing recursive destroy of a snapshot, then the
 903          * named snapshot may not exist.  Go straight to libzfs.
 904          */
 905         if (cb.cb_recurse && (cp = strchr(argv[0], '@'))) {
 906                 int ret;
 907
 908                 *cp = '\0';
 909                 if ((zhp = zfs_open(g_zfs, argv[0], ZFS_TYPE_DATASET)) == NULL)
 910                         return (1);
 911                 *cp = '@';
 912                 cp++;
 913
 914                 if (cb.cb_doclones) {
 915                         cb.cb_snapname = cp;
 916                         if (destroy_snap_clones(zhp, &cb) != 0) {
 917                                 zfs_close(zhp);
 918                                 return (1);
 919                         }
 920                 }
 921
 922                 ret = zfs_destroy_snaps(zhp, cp);
 923                 zfs_close(zhp);
 924                 if (ret) {
 925                         (void) fprintf(stderr,
 926                             gettext("no snapshots destroyed\n"));
 927                 }
 928                 return (ret != 0);
 929         }
 930
 931
 932         /* Open the given dataset */
 933         if ((zhp = zfs_open(g_zfs, argv[0], ZFS_TYPE_DATASET)) == NULL)
 934                 return (1);
 935
 936         cb.cb_target = zhp;
 937
 938         /*
 939          * Perform an explicit check for pools before going any further.
 940          */
 941         if (!cb.cb_recurse && strchr(zfs_get_name(zhp), '/') == NULL &&
 942             zfs_get_type(zhp) == ZFS_TYPE_FILESYSTEM) {
 943                 (void) fprintf(stderr, gettext("cannot destroy '%s': "
 944                     "operation does not apply to pools\n"),
 945                     zfs_get_name(zhp));
 946                 (void) fprintf(stderr, gettext("use 'zfs destroy -r "
 947                     "%s' to destroy all datasets in the pool\n"),
 948                     zfs_get_name(zhp));
 949                 (void) fprintf(stderr, gettext("use 'zpool destroy %s' "
 950                     "to destroy the pool itself\n"), zfs_get_name(zhp));
 951                 zfs_close(zhp);
 952                 return (1);
 953         }
 954
 955         /*
 956          * Check for any dependents and/or clones.
 957          */
 958         cb.cb_first = B_TRUE;
 959         if (!cb.cb_doclones &&
 960             zfs_iter_dependents(zhp, B_TRUE, destroy_check_dependent,
 961             &cb) != 0) {
 962                 zfs_close(zhp);
 963                 return (1);
 964         }
 965
 966         if (cb.cb_error ||
 967             zfs_iter_dependents(zhp, B_FALSE, destroy_callback, &cb) != 0) {
 968                 zfs_close(zhp);
 969                 return (1);
 970         }
 971
 972         /*
 973          * Do the real thing.  The callback will close the handle regardless of
 974          * whether it succeeds or not.
 975          */
 976
 977         if (destroy_callback(zhp, &cb) != 0)
 978                 return (1);
 979
 980
 981         return (0);
 982 }
 983
 984 /*
 985  * zfs get [-rHp] [-o field[,field]...] [-s source[,source]...]
 986  *      < all | property[,property]... > < fs | snap | vol > ...
 987  *
 988  *      -r      recurse over any child datasets
 989  *      -H      scripted mode.  Headers are stripped, and fields are separated
 990  *              by tabs instead of spaces.
 991  *      -o      Set of fields to display.  One of "name,property,value,source".
 992  *              Default is all four.
 993  *      -s      Set of sources to allow.  One of
 994  *              "local,default,inherited,temporary,none".  Default is all
 995  *              five.
 996  *      -p      Display values in parsable (literal) format.
 997  *
 998  *  Prints properties for the given datasets.  The user can control which
 999  *  columns to display as well as which property types to allow.
1000  */
1001
1002 /*
1003  * Invoked to display the properties for a single dataset.
1004  */
1005 static int
1006 get_callback(zfs_handle_t *zhp, void *data)
1007 {
1008         char buf[ZFS_MAXPROPLEN];
1009         zprop_source_t sourcetype;
1010         char source[ZFS_MAXNAMELEN];
1011         zprop_get_cbdata_t *cbp = data;
1012         nvlist_t *userprop = zfs_get_user_props(zhp);
1013         zprop_list_t *pl = cbp->cb_proplist;
1014         nvlist_t *propval;
1015         char *strval;
1016         char *sourceval;
1017
1018         for (; pl != NULL; pl = pl->pl_next) {
1019                 /*
1020                  * Skip the special fake placeholder.  This will also skip over
1021                  * the name property when 'all' is specified.
1022                  */
1023                 if (pl->pl_prop == ZFS_PROP_NAME &&
1024                     pl == cbp->cb_proplist)
1025                         continue;
1026
1027                 if (pl->pl_prop != ZPROP_INVAL) {
1028                         if (zfs_prop_get(zhp, pl->pl_prop, buf,
1029                             sizeof (buf), &sourcetype, source,
1030                             sizeof (source),
1031                             cbp->cb_literal) != 0) {
1032                                 if (pl->pl_all)
1033                                         continue;
1034                                 if (!zfs_prop_valid_for_type(pl->pl_prop,
1035                                     ZFS_TYPE_DATASET)) {
1036                                         (void) fprintf(stderr,
1037                                             gettext("No such property '%s'\n"),
1038                                             zfs_prop_to_name(pl->pl_prop));
1039                                         continue;
1040                                 }
1041                                 sourcetype = ZPROP_SRC_NONE;
1042                                 (void) strlcpy(buf, "-", sizeof (buf));
1043                         }
1044
1045                         zprop_print_one_property(zfs_get_name(zhp), cbp,
1046                             zfs_prop_to_name(pl->pl_prop),
1047                             buf, sourcetype, source);
1048                 } else {
1049                         if (nvlist_lookup_nvlist(userprop,
1050                             pl->pl_user_prop, &propval) != 0) {
1051                                 if (pl->pl_all)
1052                                         continue;
1053                                 sourcetype = ZPROP_SRC_NONE;
1054                                 strval = "-";
1055                         } else {
1056                                 verify(nvlist_lookup_string(propval,
1057                                     ZPROP_VALUE, &strval) == 0);
1058                                 verify(nvlist_lookup_string(propval,
1059                                     ZPROP_SOURCE, &sourceval) == 0);
1060
1061                                 if (strcmp(sourceval,
1062                                     zfs_get_name(zhp)) == 0) {
1063                                         sourcetype = ZPROP_SRC_LOCAL;
1064                                 } else {
1065                                         sourcetype = ZPROP_SRC_INHERITED;
1066                                         (void) strlcpy(source,
1067                                             sourceval, sizeof (source));
1068                                 }
1069                         }
1070
1071                         zprop_print_one_property(zfs_get_name(zhp), cbp,
1072                             pl->pl_user_prop, strval, sourcetype,
1073                             source);
1074                 }
1075         }
1076
1077         return (0);
1078 }
1079
1080 static int
1081 zfs_do_get(int argc, char **argv)
1082 {
1083         zprop_get_cbdata_t cb = { 0 };
1084         boolean_t recurse = B_FALSE;
1085         int i, c;
1086         char *value, *fields;
1087         int ret;
1088         zprop_list_t fake_name = { 0 };
1089
1090         /*
1091          * Set up default columns and sources.
1092          */
1093         cb.cb_sources = ZPROP_SRC_ALL;
1094         cb.cb_columns[0] = GET_COL_NAME;
1095         cb.cb_columns[1] = GET_COL_PROPERTY;
1096         cb.cb_columns[2] = GET_COL_VALUE;
1097         cb.cb_columns[3] = GET_COL_SOURCE;
1098         cb.cb_type = ZFS_TYPE_DATASET;
1099
1100         /* check options */
1101         while ((c = getopt(argc, argv, ":o:s:rHp")) != -1) {
1102                 switch (c) {
1103                 case 'p':
1104                         cb.cb_literal = B_TRUE;
1105                         break;
1106                 case 'r':
1107                         recurse = B_TRUE;
1108                         break;
1109                 case 'H':
1110                         cb.cb_scripted = B_TRUE;
1111                         break;
1112                 case ':':
1113                         (void) fprintf(stderr, gettext("missing argument for "
1114                             "'%c' option\n"), optopt);
1115                         usage(B_FALSE);
1116                         break;
1117                 case 'o':
1118                         /*
1119                          * Process the set of columns to display.  We zero out
1120                          * the structure to give us a blank slate.
1121                          */
1122                         bzero(&cb.cb_columns, sizeof (cb.cb_columns));
1123                         i = 0;
1124                         while (*optarg != '\0') {
1125                                 static char *col_subopts[] =
1126                                     { "name", "property", "value", "source",
1127                                     NULL };
1128
1129                                 if (i == 4) {
1130                                         (void) fprintf(stderr, gettext("too "
1131                                             "many fields given to -o "
1132                                             "option\n"));
1133                                         usage(B_FALSE);
1134                                 }
1135
1136                                 switch (getsubopt(&optarg, col_subopts,
1137                                     &value)) {
1138                                 case 0:
1139                                         cb.cb_columns[i++] = GET_COL_NAME;
1140                                         break;
1141                                 case 1:
1142                                         cb.cb_columns[i++] = GET_COL_PROPERTY;
1143                                         break;
1144                                 case 2:
1145                                         cb.cb_columns[i++] = GET_COL_VALUE;
1146                                         break;
1147                                 case 3:
1148                                         cb.cb_columns[i++] = GET_COL_SOURCE;
1149                                         break;
1150                                 default:
1151                                         (void) fprintf(stderr,
1152                                             gettext("invalid column name "
1153                                             "'%s'\n"), value);
1154                                         usage(B_FALSE);
1155                                 }
1156                         }
1157                         break;
1158
1159                 case 's':
1160                         cb.cb_sources = 0;
1161                         while (*optarg != '\0') {
1162                                 static char *source_subopts[] = {
1163                                         "local", "default", "inherited",
1164                                         "temporary", "none", NULL };
1165
1166                                 switch (getsubopt(&optarg, source_subopts,
1167                                     &value)) {
1168                                 case 0:
1169                                         cb.cb_sources |= ZPROP_SRC_LOCAL;
1170                                         break;
1171                                 case 1:
1172                                         cb.cb_sources |= ZPROP_SRC_DEFAULT;
1173                                         break;
1174                                 case 2:
1175                                         cb.cb_sources |= ZPROP_SRC_INHERITED;
1176                                         break;
1177                                 case 3:
1178                                         cb.cb_sources |= ZPROP_SRC_TEMPORARY;
1179                                         break;
1180                                 case 4:
1181                                         cb.cb_sources |= ZPROP_SRC_NONE;
1182                                         break;
1183                                 default:
1184                                         (void) fprintf(stderr,
1185                                             gettext("invalid source "
1186                                             "'%s'\n"), value);
1187                                         usage(B_FALSE);
1188                                 }
1189                         }
1190                         break;
1191
1192                 case '?':
1193                         (void) fprintf(stderr, gettext("invalid option '%c'\n"),
1194                             optopt);
1195                         usage(B_FALSE);
1196                 }
1197         }
1198
1199         argc -= optind;
1200         argv += optind;
1201
1202         if (argc < 1) {
1203                 (void) fprintf(stderr, gettext("missing property "
1204                     "argument\n"));
1205                 usage(B_FALSE);
1206         }
1207
1208         fields = argv[0];
1209
1210         if (zprop_get_list(g_zfs, fields, &cb.cb_proplist, ZFS_TYPE_DATASET)
1211             != 0)
1212                 usage(B_FALSE);
1213
1214         argc--;
1215         argv++;
1216
1217         /*
1218          * As part of zfs_expand_proplist(), we keep track of the maximum column
1219          * width for each property.  For the 'NAME' (and 'SOURCE') columns, we
1220          * need to know the maximum name length.  However, the user likely did
1221          * not specify 'name' as one of the properties to fetch, so we need to
1222          * make sure we always include at least this property for
1223          * print_get_headers() to work properly.
1224          */
1225         if (cb.cb_proplist != NULL) {
1226                 fake_name.pl_prop = ZFS_PROP_NAME;
1227                 fake_name.pl_width = strlen(gettext("NAME"));
1228                 fake_name.pl_next = cb.cb_proplist;
1229                 cb.cb_proplist = &fake_name;
1230         }
1231
1232         cb.cb_first = B_TRUE;
1233
1234         /* run for each object */
1235         ret = zfs_for_each(argc, argv, recurse, ZFS_TYPE_DATASET, NULL,
1236             &cb.cb_proplist, get_callback, &cb, B_FALSE);
1237
1238         if (cb.cb_proplist == &fake_name)
1239                 zprop_free_list(fake_name.pl_next);
1240         else
1241                 zprop_free_list(cb.cb_proplist);
1242
1243         return (ret);
1244 }
1245
1246 /*
1247  * inherit [-r] <property> <fs|vol> ...
1248  *
1249  *      -r      Recurse over all children
1250  *
1251  * For each dataset specified on the command line, inherit the given property
1252  * from its parent.  Inheriting a property at the pool level will cause it to
1253  * use the default value.  The '-r' flag will recurse over all children, and is
1254  * useful for setting a property on a hierarchy-wide basis, regardless of any
1255  * local modifications for each dataset.
1256  */
1257
1258 static int
1259 inherit_callback(zfs_handle_t *zhp, void *data)
1260 {
1261         char *propname = data;
1262         int ret;
1263
1264         ret = zfs_prop_inherit(zhp, propname);
1265         return (ret != 0);
1266 }
1267
1268 static int
1269 zfs_do_inherit(int argc, char **argv)
1270 {
1271         boolean_t recurse = B_FALSE;
1272         int c;
1273         zfs_prop_t prop;
1274         char *propname;
1275         int ret;
1276
1277         /* check options */
1278         while ((c = getopt(argc, argv, "r")) != -1) {
1279                 switch (c) {
1280                 case 'r':
1281                         recurse = B_TRUE;
1282                         break;
1283                 case '?':
1284                 default:
1285                         (void) fprintf(stderr, gettext("invalid option '%c'\n"),
1286                             optopt);
1287                         usage(B_FALSE);
1288                 }
1289         }
1290
1291         argc -= optind;
1292         argv += optind;
1293
1294         /* check number of arguments */
1295         if (argc < 1) {
1296                 (void) fprintf(stderr, gettext("missing property argument\n"));
1297                 usage(B_FALSE);
1298         }
1299         if (argc < 2) {
1300                 (void) fprintf(stderr, gettext("missing dataset argument\n"));
1301                 usage(B_FALSE);
1302         }
1303
1304         propname = argv[0];
1305         argc--;
1306         argv++;
1307
1308         if ((prop = zfs_name_to_prop(propname)) != ZPROP_INVAL) {
1309                 if (zfs_prop_readonly(prop)) {
1310                         (void) fprintf(stderr, gettext(
1311                             "%s property is read-only\n"),
1312                             propname);
1313                         return (1);
1314                 }
1315                 if (!zfs_prop_inheritable(prop)) {
1316                         (void) fprintf(stderr, gettext("'%s' property cannot "
1317                             "be inherited\n"), propname);
1318                         if (prop == ZFS_PROP_QUOTA ||
1319                             prop == ZFS_PROP_RESERVATION ||
1320                             prop == ZFS_PROP_REFQUOTA ||
1321                             prop == ZFS_PROP_REFRESERVATION)
1322                                 (void) fprintf(stderr, gettext("use 'zfs set "
1323                                     "%s=none' to clear\n"), propname);
1324                         return (1);
1325                 }
1326         } else if (!zfs_prop_user(propname)) {
1327                 (void) fprintf(stderr, gettext("invalid property '%s'\n"),
1328                     propname);
1329                 usage(B_FALSE);
1330         }
1331
1332         ret = zfs_for_each(argc, argv, recurse,
1333             ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME, NULL, NULL,
1334             inherit_callback, propname, B_FALSE);
1335
1336         return (ret);
1337 }
1338
1339 typedef struct upgrade_cbdata {
1340         uint64_t cb_numupgraded;
1341         uint64_t cb_numsamegraded;
1342         uint64_t cb_numfailed;
1343         uint64_t cb_version;
1344         boolean_t cb_newer;
1345         boolean_t cb_foundone;
1346         char cb_lastfs[ZFS_MAXNAMELEN];
1347 } upgrade_cbdata_t;
1348
1349 static int
1350 same_pool(zfs_handle_t *zhp, const char *name)
1351 {
1352         int len1 = strcspn(name, "/@");
1353         const char *zhname = zfs_get_name(zhp);
1354         int len2 = strcspn(zhname, "/@");
1355
1356         if (len1 != len2)
1357                 return (B_FALSE);
1358         return (strncmp(name, zhname, len1) == 0);
1359 }
1360
1361 static int
1362 upgrade_list_callback(zfs_handle_t *zhp, void *data)
1363 {
1364         upgrade_cbdata_t *cb = data;
1365         int version = zfs_prop_get_int(zhp, ZFS_PROP_VERSION);
1366
1367         /* list if it's old/new */
1368         if ((!cb->cb_newer && version < ZPL_VERSION) ||
1369             (cb->cb_newer && version > ZPL_VERSION)) {
1370                 char *str;
1371                 if (cb->cb_newer) {
1372                         str = gettext("The following filesystems are "
1373                             "formatted using a newer software version and\n"
1374                             "cannot be accessed on the current system.\n\n");
1375                 } else {
1376                         str = gettext("The following filesystems are "
1377                             "out of date, and can be upgraded.  After being\n"
1378                             "upgraded, these filesystems (and any 'zfs send' "
1379                             "streams generated from\n"
1380                             "subsequent snapshots) will no longer be "
1381                             "accessible by older software versions.\n\n");
1382                 }
1383
1384                 if (!cb->cb_foundone) {
1385                         (void) puts(str);
1386                         (void) printf(gettext("VER  FILESYSTEM\n"));
1387                         (void) printf(gettext("---  ------------\n"));
1388                         cb->cb_foundone = B_TRUE;
1389                 }
1390
1391                 (void) printf("%2u   %s\n", version, zfs_get_name(zhp));
1392         }
1393
1394         return (0);
1395 }
1396
1397 static int
1398 upgrade_set_callback(zfs_handle_t *zhp, void *data)
1399 {
1400         upgrade_cbdata_t *cb = data;
1401         int version = zfs_prop_get_int(zhp, ZFS_PROP_VERSION);
1402
1403         if (cb->cb_version >= ZPL_VERSION_FUID) {
1404                 int spa_version;
1405
1406                 if (zfs_spa_version(zhp, &spa_version) < 0)
1407                         return (-1);
1408
1409                 if (spa_version < SPA_VERSION_FUID) {
1410                         /* can't upgrade */
1411                         (void) printf(gettext("%s: can not be upgraded; "
1412                             "the pool version needs to first be upgraded\nto "
1413                             "version %d\n\n"),
1414                             zfs_get_name(zhp), SPA_VERSION_FUID);
1415                         cb->cb_numfailed++;
1416                         return (0);
1417                 }
1418         }
1419
1420         /* upgrade */
1421         if (version < cb->cb_version) {
1422                 char verstr[16];
1423                 (void) snprintf(verstr, sizeof (verstr),
1424                     "%llu", cb->cb_version);
1425                 if (cb->cb_lastfs[0] && !same_pool(zhp, cb->cb_lastfs)) {
1426                         /*
1427                          * If they did "zfs upgrade -a", then we could
1428                          * be doing ioctls to different pools.  We need
1429                          * to log this history once to each pool.
1430                          */
1431                         verify(zpool_stage_history(g_zfs, history_str) == 0);
1432                 }
1433                 if (zfs_prop_set(zhp, "version", verstr) == 0)
1434                         cb->cb_numupgraded++;
1435                 else
1436                         cb->cb_numfailed++;
1437                 (void) strcpy(cb->cb_lastfs, zfs_get_name(zhp));
1438         } else if (version > cb->cb_version) {
1439                 /* can't downgrade */
1440                 (void) printf(gettext("%s: can not be downgraded; "
1441                     "it is already at version %u\n"),
1442                     zfs_get_name(zhp), version);
1443                 cb->cb_numfailed++;
1444         } else {
1445                 cb->cb_numsamegraded++;
1446         }
1447         return (0);
1448 }
1449
1450 /*
1451  * zfs upgrade
1452  * zfs upgrade -v
1453  * zfs upgrade [-r] [-V <version>] <-a | filesystem>
1454  */
1455 static int
1456 zfs_do_upgrade(int argc, char **argv)
1457 {
1458         boolean_t recurse = B_FALSE;
1459         boolean_t all = B_FALSE;
1460         boolean_t showversions = B_FALSE;
1461         int ret;
1462         upgrade_cbdata_t cb = { 0 };
1463         char c;
1464
1465         /* check options */
1466         while ((c = getopt(argc, argv, "rvV:a")) != -1) {
1467                 switch (c) {
1468                 case 'r':
1469                         recurse = B_TRUE;
1470                         break;
1471                 case 'v':
1472                         showversions = B_TRUE;
1473                         break;
1474                 case 'V':
1475                         if (zfs_prop_string_to_index(ZFS_PROP_VERSION,
1476                             optarg, &cb.cb_version) != 0) {
1477                                 (void) fprintf(stderr,
1478                                     gettext("invalid version %s\n"), optarg);
1479                                 usage(B_FALSE);
1480                         }
1481                         break;
1482                 case 'a':
1483                         all = B_TRUE;
1484                         break;
1485                 case '?':
1486                 default:
1487                         (void) fprintf(stderr, gettext("invalid option '%c'\n"),
1488                             optopt);
1489                         usage(B_FALSE);
1490                 }
1491         }
1492
1493         argc -= optind;
1494         argv += optind;
1495
1496         if ((!all && !argc) && (recurse | cb.cb_version))
1497                 usage(B_FALSE);
1498         if (showversions && (recurse || all || cb.cb_version || argc))
1499                 usage(B_FALSE);
1500         if ((all || argc) && (showversions))
1501                 usage(B_FALSE);
1502         if (all && argc)
1503                 usage(B_FALSE);
1504
1505         if (showversions) {
1506                 /* Show info on available versions. */
1507                 (void) printf(gettext("The following filesystem versions are "
1508                     "supported:\n\n"));
1509                 (void) printf(gettext("VER  DESCRIPTION\n"));
1510                 (void) printf("---  -----------------------------------------"
1511                     "---------------\n");
1512                 (void) printf(gettext(" 1   Initial ZFS filesystem version\n"));
1513                 (void) printf(gettext(" 2   Enhanced directory entries\n"));
1514                 (void) printf(gettext(" 3   Case insensitive and File system "
1515                     "unique identifer (FUID)\n"));
1516                 (void) printf(gettext("\nFor more information on a particular "
1517                     "version, including supported releases, see:\n\n"));
1518                 (void) printf("http://www.opensolaris.org/os/community/zfs/"
1519                     "version/zpl/N\n\n");
1520                 (void) printf(gettext("Where 'N' is the version number.\n"));
1521                 ret = 0;
1522         } else if (argc || all) {
1523                 /* Upgrade filesystems */
1524                 if (cb.cb_version == 0)
1525                         cb.cb_version = ZPL_VERSION;
1526                 ret = zfs_for_each(argc, argv, recurse, ZFS_TYPE_FILESYSTEM,
1527                     NULL, NULL, upgrade_set_callback, &cb, B_TRUE);
1528                 (void) printf(gettext("%llu filesystems upgraded\n"),
1529                     cb.cb_numupgraded);
1530                 if (cb.cb_numsamegraded) {
1531                         (void) printf(gettext("%llu filesystems already at "
1532                             "this version\n"),
1533                             cb.cb_numsamegraded);
1534                 }
1535                 if (cb.cb_numfailed != 0)
1536                         ret = 1;
1537         } else {
1538                 /* List old-version filesytems */
1539                 boolean_t found;
1540                 (void) printf(gettext("This system is currently running "
1541                     "ZFS filesystem version %llu.\n\n"), ZPL_VERSION);
1542
1543                 ret = zfs_for_each(0, NULL, B_TRUE, ZFS_TYPE_FILESYSTEM,
1544                     NULL, NULL, upgrade_list_callback, &cb, B_TRUE);
1545
1546                 found = cb.cb_foundone;
1547                 cb.cb_foundone = B_FALSE;
1548                 cb.cb_newer = B_TRUE;
1549
1550                 ret = zfs_for_each(0, NULL, B_TRUE, ZFS_TYPE_FILESYSTEM,
1551                     NULL, NULL, upgrade_list_callback, &cb, B_TRUE);
1552
1553                 if (!cb.cb_foundone && !found) {
1554                         (void) printf(gettext("All filesystems are "
1555                             "formatted with the current version.\n"));
1556                 }
1557         }
1558
1559         return (ret);
1560 }
1561
1562 /*
1563  * list [-rH] [-o property[,property]...] [-t type[,type]...]
1564  *      [-s property [-s property]...] [-S property [-S property]...]
1565  *      <dataset> ...
1566  *
1567  *      -r      Recurse over all children
1568  *      -H      Scripted mode; elide headers and separate columns by tabs
1569  *      -o      Control which fields to display.
1570  *      -t      Control which object types to display.
1571  *      -s      Specify sort columns, descending order.
1572  *      -S      Specify sort columns, ascending order.
1573  *
1574  * When given no arguments, lists all filesystems in the system.
1575  * Otherwise, list the specified datasets, optionally recursing down them if
1576  * '-r' is specified.
1577  */
1578 typedef struct list_cbdata {
1579         boolean_t       cb_first;
1580         boolean_t       cb_scripted;
1581         zprop_list_t    *cb_proplist;
1582 } list_cbdata_t;
1583
1584 /*
1585  * Given a list of columns to display, output appropriate headers for each one.
1586  */
1587 static void
1588 print_header(zprop_list_t *pl)
1589 {
1590         char headerbuf[ZFS_MAXPROPLEN];
1591         const char *header;
1592         int i;
1593         boolean_t first = B_TRUE;
1594         boolean_t right_justify;
1595
1596         for (; pl != NULL; pl = pl->pl_next) {
1597                 if (!first) {
1598                         (void) printf("  ");
1599                 } else {
1600                         first = B_FALSE;
1601                 }
1602
1603                 right_justify = B_FALSE;
1604                 if (pl->pl_prop != ZPROP_INVAL) {
1605                         header = zfs_prop_column_name(pl->pl_prop);
1606                         right_justify = zfs_prop_align_right(pl->pl_prop);
1607                 } else {
1608                         for (i = 0; pl->pl_user_prop[i] != '\0'; i++)
1609                                 headerbuf[i] = toupper(pl->pl_user_prop[i]);
1610                         headerbuf[i] = '\0';
1611                         header = headerbuf;
1612                 }
1613
1614                 if (pl->pl_next == NULL && !right_justify)
1615                         (void) printf("%s", header);
1616                 else if (right_justify)
1617                         (void) printf("%*s", pl->pl_width, header);
1618                 else
1619                         (void) printf("%-*s", pl->pl_width, header);
1620         }
1621
1622         (void) printf("\n");
1623 }
1624
1625 /*
1626  * Given a dataset and a list of fields, print out all the properties according
1627  * to the described layout.
1628  */
1629 static void
1630 print_dataset(zfs_handle_t *zhp, zprop_list_t *pl, boolean_t scripted)
1631 {
1632         boolean_t first = B_TRUE;
1633         char property[ZFS_MAXPROPLEN];
1634         nvlist_t *userprops = zfs_get_user_props(zhp);
1635         nvlist_t *propval;
1636         char *propstr;
1637         boolean_t right_justify;
1638         int width;
1639
1640         for (; pl != NULL; pl = pl->pl_next) {
1641                 if (!first) {
1642                         if (scripted)
1643                                 (void) printf("\t");
1644                         else
1645                                 (void) printf("  ");
1646                 } else {
1647                         first = B_FALSE;
1648                 }
1649
1650                 right_justify = B_FALSE;
1651                 if (pl->pl_prop != ZPROP_INVAL) {
1652                         if (zfs_prop_get(zhp, pl->pl_prop, property,
1653                             sizeof (property), NULL, NULL, 0, B_FALSE) != 0)
1654                                 propstr = "-";
1655                         else
1656                                 propstr = property;
1657
1658                         right_justify = zfs_prop_align_right(pl->pl_prop);
1659                 } else {
1660                         if (nvlist_lookup_nvlist(userprops,
1661                             pl->pl_user_prop, &propval) != 0)
1662                                 propstr = "-";
1663                         else
1664                                 verify(nvlist_lookup_string(propval,
1665                                     ZPROP_VALUE, &propstr) == 0);
1666                 }
1667
1668                 width = pl->pl_width;
1669
1670                 /*
1671                  * If this is being called in scripted mode, or if this is the
1672                  * last column and it is left-justified, don't include a width
1673                  * format specifier.
1674                  */
1675                 if (scripted || (pl->pl_next == NULL && !right_justify))
1676                         (void) printf("%s", propstr);
1677                 else if (right_justify)
1678                         (void) printf("%*s", width, propstr);
1679                 else
1680                         (void) printf("%-*s", width, propstr);
1681         }
1682
1683         (void) printf("\n");
1684 }
1685
1686 /*
1687  * Generic callback function to list a dataset or snapshot.
1688  */
1689 static int
1690 list_callback(zfs_handle_t *zhp, void *data)
1691 {
1692         list_cbdata_t *cbp = data;
1693
1694         if (cbp->cb_first) {
1695                 if (!cbp->cb_scripted)
1696                         print_header(cbp->cb_proplist);
1697                 cbp->cb_first = B_FALSE;
1698         }
1699
1700         print_dataset(zhp, cbp->cb_proplist, cbp->cb_scripted);
1701
1702         return (0);
1703 }
1704
1705 static int
1706 zfs_do_list(int argc, char **argv)
1707 {
1708         int c;
1709         boolean_t recurse = B_FALSE;
1710         boolean_t scripted = B_FALSE;
1711         static char default_fields[] =
1712             "name,used,available,referenced,mountpoint";
1713         int types = ZFS_TYPE_DATASET;
1714         char *fields = NULL;
1715         char *basic_fields = default_fields;
1716         list_cbdata_t cb = { 0 };
1717         char *value;
1718         int ret;
1719         char *type_subopts[] = { "filesystem", "volume", "snapshot", NULL };
1720         zfs_sort_column_t *sortcol = NULL;
1721
1722         /* check options */
1723         while ((c = getopt(argc, argv, ":o:rt:Hs:S:")) != -1) {
1724                 switch (c) {
1725                 case 'o':
1726                         fields = optarg;
1727                         break;
1728                 case 'r':
1729                         recurse = B_TRUE;
1730                         break;
1731                 case 'H':
1732                         scripted = B_TRUE;
1733                         break;
1734                 case 's':
1735                         if (zfs_add_sort_column(&sortcol, optarg,
1736                             B_FALSE) != 0) {
1737                                 (void) fprintf(stderr,
1738                                     gettext("invalid property '%s'\n"), optarg);
1739                                 usage(B_FALSE);
1740                         }
1741                         break;
1742                 case 'S':
1743                         if (zfs_add_sort_column(&sortcol, optarg,
1744                             B_TRUE) != 0) {
1745                                 (void) fprintf(stderr,
1746                                     gettext("invalid property '%s'\n"), optarg);
1747                                 usage(B_FALSE);
1748                         }
1749                         break;
1750                 case 't':
1751                         types = 0;
1752                         while (*optarg != '\0') {
1753                                 switch (getsubopt(&optarg, type_subopts,
1754                                     &value)) {
1755                                 case 0:
1756                                         types |= ZFS_TYPE_FILESYSTEM;
1757                                         break;
1758                                 case 1:
1759                                         types |= ZFS_TYPE_VOLUME;
1760                                         break;
1761                                 case 2:
1762                                         types |= ZFS_TYPE_SNAPSHOT;
1763                                         break;
1764                                 default:
1765                                         (void) fprintf(stderr,
1766                                             gettext("invalid type '%s'\n"),
1767                                             value);
1768                                         usage(B_FALSE);
1769                                 }
1770                         }
1771                         break;
1772                 case ':':
1773                         (void) fprintf(stderr, gettext("missing argument for "
1774                             "'%c' option\n"), optopt);
1775                         usage(B_FALSE);
1776                         break;
1777                 case '?':
1778                         (void) fprintf(stderr, gettext("invalid option '%c'\n"),
1779                             optopt);
1780                         usage(B_FALSE);
1781                 }
1782         }
1783
1784         argc -= optind;
1785         argv += optind;
1786
1787         if (fields == NULL)
1788                 fields = basic_fields;
1789
1790         /*
1791          * If the user specifies '-o all', the zprop_get_list() doesn't
1792          * normally include the name of the dataset.  For 'zfs list', we always
1793          * want this property to be first.
1794          */
1795         if (zprop_get_list(g_zfs, fields, &cb.cb_proplist, ZFS_TYPE_DATASET)
1796             != 0)
1797                 usage(B_FALSE);
1798
1799         cb.cb_scripted = scripted;
1800         cb.cb_first = B_TRUE;
1801
1802         ret = zfs_for_each(argc, argv, recurse, types, sortcol, &cb.cb_proplist,
1803             list_callback, &cb, B_TRUE);
1804
1805         zprop_free_list(cb.cb_proplist);
1806         zfs_free_sort_columns(sortcol);
1807
1808         if (ret == 0 && cb.cb_first && !cb.cb_scripted)
1809                 (void) printf(gettext("no datasets available\n"));
1810
1811         return (ret);
1812 }
1813
1814 /*
1815  * zfs rename <fs | snap | vol> <fs | snap | vol>
1816  * zfs rename -p <fs | vol> <fs | vol>
1817  * zfs rename -r <snap> <snap>
1818  *
1819  * Renames the given dataset to another of the same type.
1820  *
1821  * The '-p' flag creates all the non-existing ancestors of the target first.
1822  */
1823 /* ARGSUSED */
1824 static int
1825 zfs_do_rename(int argc, char **argv)
1826 {
1827         zfs_handle_t *zhp;
1828         int c;
1829         int ret;
1830         boolean_t recurse = B_FALSE;
1831         boolean_t parents = B_FALSE;
1832
1833         /* check options */
1834         while ((c = getopt(argc, argv, "pr")) != -1) {
1835                 switch (c) {
1836                 case 'p':
1837                         parents = B_TRUE;
1838                         break;
1839                 case 'r':
1840                         recurse = B_TRUE;
1841                         break;
1842                 case '?':
1843                 default:
1844                         (void) fprintf(stderr, gettext("invalid option '%c'\n"),
1845                             optopt);
1846                         usage(B_FALSE);
1847                 }
1848         }
1849
1850         argc -= optind;
1851         argv += optind;
1852
1853         /* check number of arguments */
1854         if (argc < 1) {
1855                 (void) fprintf(stderr, gettext("missing source dataset "
1856                     "argument\n"));
1857                 usage(B_FALSE);
1858         }
1859         if (argc < 2) {
1860                 (void) fprintf(stderr, gettext("missing target dataset "
1861                     "argument\n"));
1862                 usage(B_FALSE);
1863         }
1864         if (argc > 2) {
1865                 (void) fprintf(stderr, gettext("too many arguments\n"));
1866                 usage(B_FALSE);
1867         }
1868
1869         if (recurse && parents) {
1870                 (void) fprintf(stderr, gettext("-p and -r options are mutually "
1871                     "exclusive\n"));
1872                 usage(B_FALSE);
1873         }
1874
1875         if (recurse && strchr(argv[0], '@') == 0) {
1876                 (void) fprintf(stderr, gettext("source dataset for recursive "
1877                     "rename must be a snapshot\n"));
1878                 usage(B_FALSE);
1879         }
1880
1881         if ((zhp = zfs_open(g_zfs, argv[0], parents ? ZFS_TYPE_FILESYSTEM |
1882             ZFS_TYPE_VOLUME : ZFS_TYPE_DATASET)) == NULL)
1883                 return (1);
1884
1885         /* If we were asked and the name looks good, try to create ancestors. */
1886         if (parents && zfs_name_valid(argv[1], zfs_get_type(zhp)) &&
1887             zfs_create_ancestors(g_zfs, argv[1]) != 0) {
1888                 zfs_close(zhp);
1889                 return (1);
1890         }
1891
1892         ret = (zfs_rename(zhp, argv[1], recurse) != 0);
1893
1894         zfs_close(zhp);
1895         return (ret);
1896 }
1897
1898 /*
1899  * zfs promote <fs>
1900  *
1901  * Promotes the given clone fs to be the parent
1902  */
1903 /* ARGSUSED */
1904 static int
1905 zfs_do_promote(int argc, char **argv)
1906 {
1907         zfs_handle_t *zhp;
1908         int ret;
1909
1910         /* check options */
1911         if (argc > 1 && argv[1][0] == '-') {
1912                 (void) fprintf(stderr, gettext("invalid option '%c'\n"),
1913                     argv[1][1]);
1914                 usage(B_FALSE);
1915         }
1916
1917         /* check number of arguments */
1918         if (argc < 2) {
1919                 (void) fprintf(stderr, gettext("missing clone filesystem"
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         zhp = zfs_open(g_zfs, argv[1], ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME);
1929         if (zhp == NULL)
1930                 return (1);
1931
1932         ret = (zfs_promote(zhp) != 0);
1933
1934
1935         zfs_close(zhp);
1936         return (ret);
1937 }
1938
1939 /*
1940  * zfs rollback [-rRf] <snapshot>
1941  *
1942  *      -r      Delete any intervening snapshots before doing rollback
1943  *      -R      Delete any snapshots and their clones
1944  *      -f      ignored for backwards compatability
1945  *
1946  * Given a filesystem, rollback to a specific snapshot, discarding any changes
1947  * since then and making it the active dataset.  If more recent snapshots exist,
1948  * the command will complain unless the '-r' flag is given.
1949  */
1950 typedef struct rollback_cbdata {
1951         uint64_t        cb_create;
1952         boolean_t       cb_first;
1953         int             cb_doclones;
1954         char            *cb_target;
1955         int             cb_error;
1956         boolean_t       cb_recurse;
1957         boolean_t       cb_dependent;
1958 } rollback_cbdata_t;
1959
1960 /*
1961  * Report any snapshots more recent than the one specified.  Used when '-r' is
1962  * not specified.  We reuse this same callback for the snapshot dependents - if
1963  * 'cb_dependent' is set, then this is a dependent and we should report it
1964  * without checking the transaction group.
1965  */
1966 static int
1967 rollback_check(zfs_handle_t *zhp, void *data)
1968 {
1969         rollback_cbdata_t *cbp = data;
1970
1971         if (cbp->cb_doclones) {
1972                 zfs_close(zhp);
1973                 return (0);
1974         }
1975
1976         if (!cbp->cb_dependent) {
1977                 if (strcmp(zfs_get_name(zhp), cbp->cb_target) != 0 &&
1978                     zfs_get_type(zhp) == ZFS_TYPE_SNAPSHOT &&
1979                     zfs_prop_get_int(zhp, ZFS_PROP_CREATETXG) >
1980                     cbp->cb_create) {
1981
1982                         if (cbp->cb_first && !cbp->cb_recurse) {
1983                                 (void) fprintf(stderr, gettext("cannot "
1984                                     "rollback to '%s': more recent snapshots "
1985                                     "exist\n"),
1986                                     cbp->cb_target);
1987                                 (void) fprintf(stderr, gettext("use '-r' to "
1988                                     "force deletion of the following "
1989                                     "snapshots:\n"));
1990                                 cbp->cb_first = 0;
1991                                 cbp->cb_error = 1;
1992                         }
1993
1994                         if (cbp->cb_recurse) {
1995                                 cbp->cb_dependent = B_TRUE;
1996                                 if (zfs_iter_dependents(zhp, B_TRUE,
1997                                     rollback_check, cbp) != 0) {
1998                                         zfs_close(zhp);
1999                                         return (-1);
2000                                 }
2001                                 cbp->cb_dependent = B_FALSE;
2002                         } else {
2003                                 (void) fprintf(stderr, "%s\n",
2004                                     zfs_get_name(zhp));
2005                         }
2006                 }
2007         } else {
2008                 if (cbp->cb_first && cbp->cb_recurse) {
2009                         (void) fprintf(stderr, gettext("cannot rollback to "
2010                             "'%s': clones of previous snapshots exist\n"),
2011                             cbp->cb_target);
2012                         (void) fprintf(stderr, gettext("use '-R' to "
2013                             "force deletion of the following clones and "
2014                             "dependents:\n"));
2015                         cbp->cb_first = 0;
2016                         cbp->cb_error = 1;
2017                 }
2018
2019                 (void) fprintf(stderr, "%s\n", zfs_get_name(zhp));
2020         }
2021
2022         zfs_close(zhp);
2023         return (0);
2024 }
2025
2026 static int
2027 zfs_do_rollback(int argc, char **argv)
2028 {
2029         int ret;
2030         int c;
2031         boolean_t force = B_FALSE;
2032         rollback_cbdata_t cb = { 0 };
2033         zfs_handle_t *zhp, *snap;
2034         char parentname[ZFS_MAXNAMELEN];
2035         char *delim;
2036
2037         /* check options */
2038         while ((c = getopt(argc, argv, "rRf")) != -1) {
2039                 switch (c) {
2040                 case 'r':
2041                         cb.cb_recurse = 1;
2042                         break;
2043                 case 'R':
2044                         cb.cb_recurse = 1;
2045                         cb.cb_doclones = 1;
2046                         break;
2047                 case 'f':
2048                         force = B_TRUE;
2049                         break;
2050                 case '?':
2051                         (void) fprintf(stderr, gettext("invalid option '%c'\n"),
2052                             optopt);
2053                         usage(B_FALSE);
2054                 }
2055         }
2056
2057         argc -= optind;
2058         argv += optind;
2059
2060         /* check number of arguments */
2061         if (argc < 1) {
2062                 (void) fprintf(stderr, gettext("missing dataset argument\n"));
2063                 usage(B_FALSE);
2064         }
2065         if (argc > 1) {
2066                 (void) fprintf(stderr, gettext("too many arguments\n"));
2067                 usage(B_FALSE);
2068         }
2069
2070         /* open the snapshot */
2071         if ((snap = zfs_open(g_zfs, argv[0], ZFS_TYPE_SNAPSHOT)) == NULL)
2072                 return (1);
2073
2074         /* open the parent dataset */
2075         (void) strlcpy(parentname, argv[0], sizeof (parentname));
2076         verify((delim = strrchr(parentname, '@')) != NULL);
2077         *delim = '\0';
2078         if ((zhp = zfs_open(g_zfs, parentname, ZFS_TYPE_DATASET)) == NULL) {
2079                 zfs_close(snap);
2080                 return (1);
2081         }
2082
2083         /*
2084          * Check for more recent snapshots and/or clones based on the presence
2085          * of '-r' and '-R'.
2086          */
2087         cb.cb_target = argv[0];
2088         cb.cb_create = zfs_prop_get_int(snap, ZFS_PROP_CREATETXG);
2089         cb.cb_first = B_TRUE;
2090         cb.cb_error = 0;
2091         if ((ret = zfs_iter_children(zhp, rollback_check, &cb)) != 0)
2092                 goto out;
2093
2094         if ((ret = cb.cb_error) != 0)
2095                 goto out;
2096
2097         /*
2098          * Rollback parent to the given snapshot.
2099          */
2100         ret = zfs_rollback(zhp, snap, force);
2101
2102 out:
2103         zfs_close(snap);
2104         zfs_close(zhp);
2105
2106         if (ret == 0)
2107                 return (0);
2108         else
2109                 return (1);
2110 }
2111
2112 /*
2113  * zfs set property=value { fs | snap | vol } ...
2114  *
2115  * Sets the given property for all datasets specified on the command line.
2116  */
2117 typedef struct set_cbdata {
2118         char            *cb_propname;
2119         char            *cb_value;
2120 } set_cbdata_t;
2121
2122 static int
2123 set_callback(zfs_handle_t *zhp, void *data)
2124 {
2125         set_cbdata_t *cbp = data;
2126
2127         if (zfs_prop_set(zhp, cbp->cb_propname, cbp->cb_value) != 0) {
2128                 switch (libzfs_errno(g_zfs)) {
2129                 case EZFS_MOUNTFAILED:
2130                         (void) fprintf(stderr, gettext("property may be set "
2131                             "but unable to remount filesystem\n"));
2132                         break;
2133                 case EZFS_SHARENFSFAILED:
2134                         (void) fprintf(stderr, gettext("property may be set "
2135                             "but unable to reshare filesystem\n"));
2136                         break;
2137                 }
2138                 return (1);
2139         }
2140         return (0);
2141 }
2142
2143 static int
2144 zfs_do_set(int argc, char **argv)
2145 {
2146         set_cbdata_t cb;
2147         int ret;
2148
2149         /* check for options */
2150         if (argc > 1 && argv[1][0] == '-') {
2151                 (void) fprintf(stderr, gettext("invalid option '%c'\n"),
2152                     argv[1][1]);
2153                 usage(B_FALSE);
2154         }
2155
2156         /* check number of arguments */
2157         if (argc < 2) {
2158                 (void) fprintf(stderr, gettext("missing property=value "
2159                     "argument\n"));
2160                 usage(B_FALSE);
2161         }
2162         if (argc < 3) {
2163                 (void) fprintf(stderr, gettext("missing dataset name\n"));
2164                 usage(B_FALSE);
2165         }
2166
2167         /* validate property=value argument */
2168         cb.cb_propname = argv[1];
2169         if ((cb.cb_value = strchr(cb.cb_propname, '=')) == NULL) {
2170                 (void) fprintf(stderr, gettext("missing value in "
2171                     "property=value argument\n"));
2172                 usage(B_FALSE);
2173         }
2174
2175         *cb.cb_value = '\0';
2176         cb.cb_value++;
2177
2178         if (*cb.cb_propname == '\0') {
2179                 (void) fprintf(stderr,
2180                     gettext("missing property in property=value argument\n"));
2181                 usage(B_FALSE);
2182         }
2183
2184
2185         ret = zfs_for_each(argc - 2, argv + 2, B_FALSE,
2186             ZFS_TYPE_DATASET, NULL, NULL, set_callback, &cb, B_FALSE);
2187
2188         return (ret);
2189 }
2190
2191 /*
2192  * zfs snapshot [-r] <fs@snap>
2193  *
2194  * Creates a snapshot with the given name.  While functionally equivalent to
2195  * 'zfs create', it is a separate command to differentiate intent.
2196  */
2197 static int
2198 zfs_do_snapshot(int argc, char **argv)
2199 {
2200         boolean_t recursive = B_FALSE;
2201         int ret;
2202         char c;
2203
2204         /* check options */
2205         while ((c = getopt(argc, argv, ":r")) != -1) {
2206                 switch (c) {
2207                 case 'r':
2208                         recursive = B_TRUE;
2209                         break;
2210                 case '?':
2211                         (void) fprintf(stderr, gettext("invalid option '%c'\n"),
2212                             optopt);
2213                         usage(B_FALSE);
2214                 }
2215         }
2216
2217         argc -= optind;
2218         argv += optind;
2219
2220         /* check number of arguments */
2221         if (argc < 1) {
2222                 (void) fprintf(stderr, gettext("missing snapshot argument\n"));
2223                 usage(B_FALSE);
2224         }
2225         if (argc > 1) {
2226                 (void) fprintf(stderr, gettext("too many arguments\n"));
2227                 usage(B_FALSE);
2228         }
2229
2230         ret = zfs_snapshot(g_zfs, argv[0], recursive);
2231         if (ret && recursive)
2232                 (void) fprintf(stderr, gettext("no snapshots were created\n"));
2233         return (ret != 0);
2234 }
2235
2236 /*
2237  * zfs send [-v] -R [-i|-I <@snap>] <fs@snap>
2238  * zfs send [-v] [-i|-I <@snap>] <fs@snap>
2239  *
2240  * Send a backup stream to stdout.
2241  */
2242 static int
2243 zfs_do_send(int argc, char **argv)
2244 {
2245         char *fromname = NULL;
2246         char *toname = NULL;
2247         char *cp;
2248         zfs_handle_t *zhp;
2249         boolean_t doall = B_FALSE;
2250         boolean_t replicate = B_FALSE;
2251         boolean_t fromorigin = B_FALSE;
2252         boolean_t verbose = B_FALSE;
2253         int c, err;
2254
2255         /* check options */
2256         while ((c = getopt(argc, argv, ":i:I:Rv")) != -1) {
2257                 switch (c) {
2258                 case 'i':
2259                         if (fromname)
2260                                 usage(B_FALSE);
2261                         fromname = optarg;
2262                         break;
2263                 case 'I':
2264                         if (fromname)
2265                                 usage(B_FALSE);
2266                         fromname = optarg;
2267                         doall = B_TRUE;
2268                         break;
2269                 case 'R':
2270                         replicate = B_TRUE;
2271                         break;
2272                 case 'v':
2273                         verbose = B_TRUE;
2274                         break;
2275                 case ':':
2276                         (void) fprintf(stderr, gettext("missing argument for "
2277                             "'%c' option\n"), optopt);
2278                         usage(B_FALSE);
2279                         break;
2280                 case '?':
2281                         (void) fprintf(stderr, gettext("invalid option '%c'\n"),
2282                             optopt);
2283                         usage(B_FALSE);
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                 usage(B_FALSE);
2294         }
2295         if (argc > 1) {
2296                 (void) fprintf(stderr, gettext("too many arguments\n"));
2297                 usage(B_FALSE);
2298         }
2299
2300         if (isatty(STDOUT_FILENO)) {
2301                 (void) fprintf(stderr,
2302                     gettext("Error: Stream can not be written to a terminal.\n"
2303                     "You must redirect standard output.\n"));
2304                 return (1);
2305         }
2306
2307         cp = strchr(argv[0], '@');
2308         if (cp == NULL) {
2309                 (void) fprintf(stderr,
2310                     gettext("argument must be a snapshot\n"));
2311                 usage(B_FALSE);
2312         }
2313         *cp = '\0';
2314         toname = cp + 1;
2315         zhp = zfs_open(g_zfs, argv[0], ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME);
2316         if (zhp == NULL)
2317                 return (1);
2318
2319         /*
2320          * If they specified the full path to the snapshot, chop off
2321          * everything except the short name of the snapshot, but special
2322          * case if they specify the origin.
2323          */
2324         if (fromname && (cp = strchr(fromname, '@')) != NULL) {
2325                 char origin[ZFS_MAXNAMELEN];
2326                 zprop_source_t src;
2327
2328                 (void) zfs_prop_get(zhp, ZFS_PROP_ORIGIN,
2329                     origin, sizeof (origin), &src, NULL, 0, B_FALSE);
2330
2331                 if (strcmp(origin, fromname) == 0) {
2332                         fromname = NULL;
2333                         fromorigin = B_TRUE;
2334                 } else {
2335                         *cp = '\0';
2336                         if (cp != fromname && strcmp(argv[0], fromname)) {
2337                                 (void) fprintf(stderr,
2338                                     gettext("incremental source must be "
2339                                     "in same filesystem\n"));
2340                                 usage(B_FALSE);
2341                         }
2342                         fromname = cp + 1;
2343                         if (strchr(fromname, '@') || strchr(fromname, '/')) {
2344                                 (void) fprintf(stderr,
2345                                     gettext("invalid incremental source\n"));
2346                                 usage(B_FALSE);
2347                         }
2348                 }
2349         }
2350
2351         if (replicate && fromname == NULL)
2352                 doall = B_TRUE;
2353
2354         err = zfs_send(zhp, fromname, toname, replicate, doall, fromorigin,
2355             verbose, STDOUT_FILENO);
2356         zfs_close(zhp);
2357
2358         return (err != 0);
2359 }
2360
2361 /*
2362  * zfs receive [-dnvF] <fs@snap>
2363  *
2364  * Restore a backup stream from stdin.
2365  */
2366 static int
2367 zfs_do_receive(int argc, char **argv)
2368 {
2369         int c, err;
2370         recvflags_t flags;
2371
2372         bzero(&flags, sizeof (recvflags_t));
2373         /* check options */
2374         while ((c = getopt(argc, argv, ":dnvF")) != -1) {
2375                 switch (c) {
2376                 case 'd':
2377                         flags.isprefix = B_TRUE;
2378                         break;
2379                 case 'n':
2380                         flags.dryrun = B_TRUE;
2381                         break;
2382                 case 'v':
2383                         flags.verbose = B_TRUE;
2384                         break;
2385                 case 'F':
2386                         flags.force = B_TRUE;
2387                         break;
2388                 case ':':
2389                         (void) fprintf(stderr, gettext("missing argument for "
2390                             "'%c' option\n"), optopt);
2391                         usage(B_FALSE);
2392                         break;
2393                 case '?':
2394                         (void) fprintf(stderr, gettext("invalid option '%c'\n"),
2395                             optopt);
2396                         usage(B_FALSE);
2397                 }
2398         }
2399
2400         argc -= optind;
2401         argv += optind;
2402
2403         /* check number of arguments */
2404         if (argc < 1) {
2405                 (void) fprintf(stderr, gettext("missing snapshot argument\n"));
2406                 usage(B_FALSE);
2407         }
2408         if (argc > 1) {
2409                 (void) fprintf(stderr, gettext("too many arguments\n"));
2410                 usage(B_FALSE);
2411         }
2412
2413         if (isatty(STDIN_FILENO)) {
2414                 (void) fprintf(stderr,
2415                     gettext("Error: Backup stream can not be read "
2416                     "from a terminal.\n"
2417                     "You must redirect standard input.\n"));
2418                 return (1);
2419         }
2420
2421         err = zfs_receive(g_zfs, argv[0], flags, STDIN_FILENO, NULL);
2422
2423         return (err != 0);
2424 }
2425
2426 typedef struct allow_cb {
2427         int  a_permcnt;
2428         size_t a_treeoffset;
2429 } allow_cb_t;
2430
2431 static void
2432 zfs_print_perms(avl_tree_t *tree)
2433 {
2434         zfs_perm_node_t *permnode;
2435
2436         permnode = avl_first(tree);
2437         while (permnode != NULL) {
2438                 (void) printf("%s", permnode->z_pname);
2439                 permnode = AVL_NEXT(tree, permnode);
2440                 if (permnode)
2441                         (void) printf(",");
2442                 else
2443                         (void) printf("\n");
2444         }
2445 }
2446
2447 /*
2448  * Iterate over user/groups/everyone/... and the call perm_iter
2449  * function to print actual permission when tree has >0 nodes.
2450  */
2451 static void
2452 zfs_iter_perms(avl_tree_t *tree, const char *banner, allow_cb_t *cb)
2453 {
2454         zfs_allow_node_t *item;
2455         avl_tree_t *ptree;
2456
2457         item = avl_first(tree);
2458         while (item) {
2459                 ptree = (void *)((char *)item + cb->a_treeoffset);
2460                 if (avl_numnodes(ptree)) {
2461                         if (cb->a_permcnt++ == 0)
2462                                 (void) printf("%s\n", banner);
2463                         (void) printf("\t%s", item->z_key);
2464                         /*
2465                          * Avoid an extra space being printed
2466                          * for "everyone" which is keyed with a null
2467                          * string
2468                          */
2469                         if (item->z_key[0] != '\0')
2470                                 (void) printf(" ");
2471                         zfs_print_perms(ptree);
2472                 }
2473                 item = AVL_NEXT(tree, item);
2474         }
2475 }
2476
2477 #define LINES "-------------------------------------------------------------\n"
2478 static int
2479 zfs_print_allows(char *ds)
2480 {
2481         zfs_allow_t *curperms, *perms;
2482         zfs_handle_t *zhp;
2483         allow_cb_t allowcb = { 0 };
2484         char banner[MAXPATHLEN];
2485
2486         if (ds[0] == '-')
2487                 usage(B_FALSE);
2488
2489         if (strrchr(ds, '@')) {
2490                 (void) fprintf(stderr, gettext("Snapshots don't have 'allow'"
2491                     " permissions\n"));
2492                 return (1);
2493         }
2494         if ((zhp = zfs_open(g_zfs, ds, ZFS_TYPE_DATASET)) == NULL)
2495                 return (1);
2496
2497         if (zfs_perm_get(zhp, &perms)) {
2498                 (void) fprintf(stderr,
2499                     gettext("Failed to retrieve 'allows' on %s\n"), ds);
2500                 zfs_close(zhp);
2501                 return (1);
2502         }
2503
2504         zfs_close(zhp);
2505
2506         if (perms != NULL)
2507                 (void) printf("%s", LINES);
2508         for (curperms = perms; curperms; curperms = curperms->z_next) {
2509
2510                 (void) snprintf(banner, sizeof (banner),
2511                     "Permission sets on (%s)", curperms->z_setpoint);
2512                 allowcb.a_treeoffset =
2513                     offsetof(zfs_allow_node_t, z_localdescend);
2514                 allowcb.a_permcnt = 0;
2515                 zfs_iter_perms(&curperms->z_sets, banner, &allowcb);
2516
2517                 (void) snprintf(banner, sizeof (banner),
2518                     "Create time permissions on (%s)", curperms->z_setpoint);
2519                 allowcb.a_treeoffset =
2520                     offsetof(zfs_allow_node_t, z_localdescend);
2521                 allowcb.a_permcnt = 0;
2522                 zfs_iter_perms(&curperms->z_crperms, banner, &allowcb);
2523
2524
2525                 (void) snprintf(banner, sizeof (banner),
2526                     "Local permissions on (%s)", curperms->z_setpoint);
2527                 allowcb.a_treeoffset = offsetof(zfs_allow_node_t, z_local);
2528                 allowcb.a_permcnt = 0;
2529                 zfs_iter_perms(&curperms->z_user, banner, &allowcb);
2530                 zfs_iter_perms(&curperms->z_group, banner, &allowcb);
2531                 zfs_iter_perms(&curperms->z_everyone, banner, &allowcb);
2532
2533                 (void) snprintf(banner, sizeof (banner),
2534                     "Descendent permissions on (%s)", curperms->z_setpoint);
2535                 allowcb.a_treeoffset = offsetof(zfs_allow_node_t, z_descend);
2536                 allowcb.a_permcnt = 0;
2537                 zfs_iter_perms(&curperms->z_user, banner, &allowcb);
2538                 zfs_iter_perms(&curperms->z_group, banner, &allowcb);
2539                 zfs_iter_perms(&curperms->z_everyone, banner, &allowcb);
2540
2541                 (void) snprintf(banner, sizeof (banner),
2542                     "Local+Descendent permissions on (%s)",
2543                     curperms->z_setpoint);
2544                 allowcb.a_treeoffset =
2545                     offsetof(zfs_allow_node_t, z_localdescend);
2546                 allowcb.a_permcnt = 0;
2547                 zfs_iter_perms(&curperms->z_user, banner, &allowcb);
2548                 zfs_iter_perms(&curperms->z_group, banner, &allowcb);
2549                 zfs_iter_perms(&curperms->z_everyone, banner, &allowcb);
2550
2551                 (void) printf("%s", LINES);
2552         }
2553         zfs_free_allows(perms);
2554         return (0);
2555 }
2556
2557 #define ALLOWOPTIONS "ldcsu:g:e"
2558 #define UNALLOWOPTIONS "ldcsu:g:er"
2559
2560 /*
2561  * Validate options, and build necessary datastructure to display/remove/add
2562  * permissions.
2563  * Returns 0 - If permissions should be added/removed
2564  * Returns 1 - If permissions should be displayed.
2565  * Returns -1 - on failure
2566  */
2567 int
2568 parse_allow_args(int *argc, char **argv[], boolean_t unallow,
2569     char **ds, int *recurse, nvlist_t **zperms)
2570 {
2571         int c;
2572         char *options = unallow ? UNALLOWOPTIONS : ALLOWOPTIONS;
2573         zfs_deleg_inherit_t deleg_type = ZFS_DELEG_NONE;
2574         zfs_deleg_who_type_t who_type = ZFS_DELEG_WHO_UNKNOWN;
2575         char *who = NULL;
2576         char *perms = NULL;
2577         zfs_handle_t *zhp;
2578
2579         while ((c = getopt(*argc, *argv, options)) != -1) {
2580                 switch (c) {
2581                 case 'l':
2582                         if (who_type == ZFS_DELEG_CREATE ||
2583                             who_type == ZFS_DELEG_NAMED_SET)
2584                                 usage(B_FALSE);
2585
2586                         deleg_type |= ZFS_DELEG_PERM_LOCAL;
2587                         break;
2588                 case 'd':
2589                         if (who_type == ZFS_DELEG_CREATE ||
2590                             who_type == ZFS_DELEG_NAMED_SET)
2591                                 usage(B_FALSE);
2592
2593                         deleg_type |= ZFS_DELEG_PERM_DESCENDENT;
2594                         break;
2595                 case 'r':
2596                         *recurse = B_TRUE;
2597                         break;
2598                 case 'c':
2599                         if (who_type != ZFS_DELEG_WHO_UNKNOWN)
2600                                 usage(B_FALSE);
2601                         if (deleg_type)
2602                                 usage(B_FALSE);
2603                         who_type = ZFS_DELEG_CREATE;
2604                         break;
2605                 case 's':
2606                         if (who_type != ZFS_DELEG_WHO_UNKNOWN)
2607                                 usage(B_FALSE);
2608                         if (deleg_type)
2609                                 usage(B_FALSE);
2610                         who_type = ZFS_DELEG_NAMED_SET;
2611                         break;
2612                 case 'u':
2613                         if (who_type != ZFS_DELEG_WHO_UNKNOWN)
2614                                 usage(B_FALSE);
2615                         who_type = ZFS_DELEG_USER;
2616                         who = optarg;
2617                         break;
2618                 case 'g':
2619                         if (who_type != ZFS_DELEG_WHO_UNKNOWN)
2620                                 usage(B_FALSE);
2621                         who_type = ZFS_DELEG_GROUP;
2622                         who = optarg;
2623                         break;
2624                 case 'e':
2625                         if (who_type != ZFS_DELEG_WHO_UNKNOWN)
2626                                 usage(B_FALSE);
2627                         who_type = ZFS_DELEG_EVERYONE;
2628                         break;
2629                 default:
2630                         usage(B_FALSE);
2631                         break;
2632                 }
2633         }
2634
2635         if (deleg_type == 0)
2636                 deleg_type = ZFS_DELEG_PERM_LOCALDESCENDENT;
2637
2638         *argc -= optind;
2639         *argv += optind;
2640
2641         if (unallow == B_FALSE && *argc == 1) {
2642                 /*
2643                  * Only print permissions if no options were processed
2644                  */
2645                 if (optind == 1)
2646                         return (1);
2647                 else
2648                         usage(B_FALSE);
2649         }
2650
2651         /*
2652          * initialize variables for zfs_build_perms based on number
2653          * of arguments.
2654          * 3 arguments ==>      zfs [un]allow joe perm,perm,perm <dataset> or
2655          *                      zfs [un]allow -s @set1 perm,perm <dataset>
2656          * 2 arguments ==>      zfs [un]allow -c perm,perm <dataset> or
2657          *                      zfs [un]allow -u|-g <name> perm <dataset> or
2658          *                      zfs [un]allow -e perm,perm <dataset>
2659          *                      zfs unallow joe <dataset>
2660          *                      zfs unallow -s @set1 <dataset>
2661          * 1 argument  ==>      zfs [un]allow -e <dataset> or
2662          *                      zfs [un]allow -c <dataset>
2663          */
2664
2665         switch (*argc) {
2666         case 3:
2667                 perms = (*argv)[1];
2668                 who = (*argv)[0];
2669                 *ds = (*argv)[2];
2670
2671                 /*
2672                  * advance argc/argv for do_allow cases.
2673                  * for do_allow case make sure who have a know who type
2674                  * and its not a permission set.
2675                  */
2676                 if (unallow == B_TRUE) {
2677                         *argc -= 2;
2678                         *argv += 2;
2679                 } else if (who_type != ZFS_DELEG_WHO_UNKNOWN &&
2680                     who_type != ZFS_DELEG_NAMED_SET)
2681                         usage(B_FALSE);
2682                 break;
2683
2684         case 2:
2685                 if (unallow == B_TRUE && (who_type == ZFS_DELEG_EVERYONE ||
2686                     who_type == ZFS_DELEG_CREATE || who != NULL)) {
2687                         perms = (*argv)[0];
2688                         *ds = (*argv)[1];
2689                 } else {
2690                         if (unallow == B_FALSE &&
2691                             (who_type == ZFS_DELEG_WHO_UNKNOWN ||
2692                             who_type == ZFS_DELEG_NAMED_SET))
2693                                 usage(B_FALSE);
2694                         else if (who_type == ZFS_DELEG_WHO_UNKNOWN ||
2695                             who_type == ZFS_DELEG_NAMED_SET)
2696                                 who = (*argv)[0];
2697                         else if (who_type != ZFS_DELEG_NAMED_SET)
2698                                 perms = (*argv)[0];
2699                         *ds = (*argv)[1];
2700                 }
2701                 if (unallow == B_TRUE) {
2702                         (*argc)--;
2703                         (*argv)++;
2704                 }
2705                 break;
2706
2707         case 1:
2708                 if (unallow == B_FALSE)
2709                         usage(B_FALSE);
2710                 if (who == NULL && who_type != ZFS_DELEG_CREATE &&
2711                     who_type != ZFS_DELEG_EVERYONE)
2712                         usage(B_FALSE);
2713                 *ds = (*argv)[0];
2714                 break;
2715
2716         default:
2717                 usage(B_FALSE);
2718         }
2719
2720         if (strrchr(*ds, '@')) {
2721                 (void) fprintf(stderr,
2722                     gettext("Can't set or remove 'allow' permissions "
2723                     "on snapshots.\n"));
2724                         return (-1);
2725         }
2726
2727         if ((zhp = zfs_open(g_zfs, *ds, ZFS_TYPE_DATASET)) == NULL)
2728                 return (-1);
2729
2730         if ((zfs_build_perms(zhp, who, perms,
2731             who_type, deleg_type, zperms)) != 0) {
2732                 zfs_close(zhp);
2733                 return (-1);
2734         }
2735         zfs_close(zhp);
2736         return (0);
2737 }
2738
2739 static int
2740 zfs_do_allow(int argc, char **argv)
2741 {
2742         char *ds;
2743         nvlist_t *zperms = NULL;
2744         zfs_handle_t *zhp;
2745         int unused;
2746         int ret;
2747
2748         if ((ret = parse_allow_args(&argc, &argv, B_FALSE, &ds,
2749             &unused, &zperms)) == -1)
2750                 return (1);
2751
2752         if (ret == 1)
2753                 return (zfs_print_allows(argv[0]));
2754
2755         if ((zhp = zfs_open(g_zfs, ds, ZFS_TYPE_DATASET)) == NULL)
2756                 return (1);
2757
2758         if (zfs_perm_set(zhp, zperms)) {
2759                 zfs_close(zhp);
2760                 nvlist_free(zperms);
2761                 return (1);
2762         }
2763         nvlist_free(zperms);
2764         zfs_close(zhp);
2765
2766         return (0);
2767 }
2768
2769 static int
2770 unallow_callback(zfs_handle_t *zhp, void *data)
2771 {
2772         nvlist_t *nvp = (nvlist_t *)data;
2773         int error;
2774
2775         error = zfs_perm_remove(zhp, nvp);
2776         if (error) {
2777                 (void) fprintf(stderr, gettext("Failed to remove permissions "
2778                     "on %s\n"), zfs_get_name(zhp));
2779         }
2780         return (error);
2781 }
2782
2783 static int
2784 zfs_do_unallow(int argc, char **argv)
2785 {
2786         int recurse = B_FALSE;
2787         char *ds;
2788         int error;
2789         nvlist_t *zperms = NULL;
2790
2791         if (parse_allow_args(&argc, &argv, B_TRUE,
2792             &ds, &recurse, &zperms) == -1)
2793                 return (1);
2794
2795         error = zfs_for_each(argc, argv, recurse,
2796             ZFS_TYPE_FILESYSTEM|ZFS_TYPE_VOLUME, NULL,
2797             NULL, unallow_callback, (void *)zperms, B_FALSE);
2798
2799         if (zperms)
2800                 nvlist_free(zperms);
2801
2802         return (error);
2803 }
2804
2805 typedef struct get_all_cbdata {
2806         zfs_handle_t    **cb_handles;
2807         size_t          cb_alloc;
2808         size_t          cb_used;
2809         uint_t          cb_types;
2810         boolean_t       cb_verbose;
2811 } get_all_cbdata_t;
2812
2813 #define CHECK_SPINNER 30
2814 #define SPINNER_TIME 3          /* seconds */
2815 #define MOUNT_TIME 5            /* seconds */
2816
2817 static int
2818 get_one_dataset(zfs_handle_t *zhp, void *data)
2819 {
2820         static char spin[] = { '-', '\\', '|', '/' };
2821         static int spinval = 0;
2822         static int spincheck = 0;
2823         static time_t last_spin_time = (time_t)0;
2824         get_all_cbdata_t *cbp = data;
2825         zfs_type_t type = zfs_get_type(zhp);
2826
2827         if (cbp->cb_verbose) {
2828                 if (--spincheck < 0) {
2829                         time_t now = time(NULL);
2830                         if (last_spin_time + SPINNER_TIME < now) {
2831                                 (void) printf("\b%c", spin[spinval++ % 4]);
2832                                 (void) fflush(stdout);
2833                                 last_spin_time = now;
2834                         }
2835                         spincheck = CHECK_SPINNER;
2836                 }
2837         }
2838
2839         /*
2840          * Interate over any nested datasets.
2841          */
2842         if (type == ZFS_TYPE_FILESYSTEM &&
2843             zfs_iter_filesystems(zhp, get_one_dataset, data) != 0) {
2844                 zfs_close(zhp);
2845                 return (1);
2846         }
2847
2848         /*
2849          * Skip any datasets whose type does not match.
2850          */
2851         if ((type & cbp->cb_types) == 0) {
2852                 zfs_close(zhp);
2853                 return (0);
2854         }
2855
2856         if (cbp->cb_alloc == cbp->cb_used) {
2857                 zfs_handle_t **handles;
2858
2859                 if (cbp->cb_alloc == 0)
2860                         cbp->cb_alloc = 64;
2861                 else
2862                         cbp->cb_alloc *= 2;
2863
2864                 handles = safe_malloc(cbp->cb_alloc * sizeof (void *));
2865
2866                 if (cbp->cb_handles) {
2867                         bcopy(cbp->cb_handles, handles,
2868                             cbp->cb_used * sizeof (void *));
2869                         free(cbp->cb_handles);
2870                 }
2871
2872                 cbp->cb_handles = handles;
2873         }
2874
2875         cbp->cb_handles[cbp->cb_used++] = zhp;
2876
2877         return (0);
2878 }
2879
2880 static void
2881 get_all_datasets(uint_t types, zfs_handle_t ***dslist, size_t *count,
2882     boolean_t verbose)
2883 {
2884         get_all_cbdata_t cb = { 0 };
2885         cb.cb_types = types;
2886         cb.cb_verbose = verbose;
2887
2888         if (verbose) {
2889                 (void) printf("%s: *", gettext("Reading ZFS config"));
2890                 (void) fflush(stdout);
2891         }
2892
2893         (void) zfs_iter_root(g_zfs, get_one_dataset, &cb);
2894
2895         *dslist = cb.cb_handles;
2896         *count = cb.cb_used;
2897
2898         if (verbose) {
2899                 (void) printf("\b%s\n", gettext("done."));
2900         }
2901 }
2902
2903 static int
2904 dataset_cmp(const void *a, const void *b)
2905 {
2906         zfs_handle_t **za = (zfs_handle_t **)a;
2907         zfs_handle_t **zb = (zfs_handle_t **)b;
2908         char mounta[MAXPATHLEN];
2909         char mountb[MAXPATHLEN];
2910         boolean_t gota, gotb;
2911
2912         if ((gota = (zfs_get_type(*za) == ZFS_TYPE_FILESYSTEM)) != 0)
2913                 verify(zfs_prop_get(*za, ZFS_PROP_MOUNTPOINT, mounta,
2914                     sizeof (mounta), NULL, NULL, 0, B_FALSE) == 0);
2915         if ((gotb = (zfs_get_type(*zb) == ZFS_TYPE_FILESYSTEM)) != 0)
2916                 verify(zfs_prop_get(*zb, ZFS_PROP_MOUNTPOINT, mountb,
2917                     sizeof (mountb), NULL, NULL, 0, B_FALSE) == 0);
2918
2919         if (gota && gotb)
2920                 return (strcmp(mounta, mountb));
2921
2922         if (gota)
2923                 return (-1);
2924         if (gotb)
2925                 return (1);
2926
2927         return (strcmp(zfs_get_name(a), zfs_get_name(b)));
2928 }
2929
2930 /*
2931  * Generic callback for sharing or mounting filesystems.  Because the code is so
2932  * similar, we have a common function with an extra parameter to determine which
2933  * mode we are using.
2934  */
2935 #define OP_SHARE        0x1
2936 #define OP_MOUNT        0x2
2937
2938 /*
2939  * Share or mount a dataset.
2940  */
2941 static int
2942 share_mount_one(zfs_handle_t *zhp, int op, int flags, char *protocol,
2943     boolean_t explicit, const char *options)
2944 {
2945         char mountpoint[ZFS_MAXPROPLEN];
2946         char shareopts[ZFS_MAXPROPLEN];
2947         char smbshareopts[ZFS_MAXPROPLEN];
2948         const char *cmdname = op == OP_SHARE ? "share" : "mount";
2949         struct mnttab mnt;
2950         uint64_t zoned, canmount;
2951         zfs_type_t type = zfs_get_type(zhp);
2952         boolean_t shared_nfs, shared_smb;
2953
2954         assert(type & (ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME));
2955
2956         if (type == ZFS_TYPE_FILESYSTEM) {
2957                 /*
2958                  * Check to make sure we can mount/share this dataset.  If we
2959                  * are in the global zone and the filesystem is exported to a
2960                  * local zone, or if we are in a local zone and the
2961                  * filesystem is not exported, then it is an error.
2962                  */
2963                 zoned = zfs_prop_get_int(zhp, ZFS_PROP_ZONED);
2964
2965                 if (zoned && getzoneid() == GLOBAL_ZONEID) {
2966                         if (!explicit)
2967                                 return (0);
2968
2969                         (void) fprintf(stderr, gettext("cannot %s '%s': "
2970                             "dataset is exported to a local zone\n"), cmdname,
2971                             zfs_get_name(zhp));
2972                         return (1);
2973
2974                 } else if (!zoned && getzoneid() != GLOBAL_ZONEID) {
2975                         if (!explicit)
2976                                 return (0);
2977
2978                         (void) fprintf(stderr, gettext("cannot %s '%s': "
2979                             "permission denied\n"), cmdname,
2980                             zfs_get_name(zhp));
2981                         return (1);
2982                 }
2983
2984                 /*
2985                  * Ignore any filesystems which don't apply to us. This
2986                  * includes those with a legacy mountpoint, or those with
2987                  * legacy share options.
2988                  */
2989                 verify(zfs_prop_get(zhp, ZFS_PROP_MOUNTPOINT, mountpoint,
2990                     sizeof (mountpoint), NULL, NULL, 0, B_FALSE) == 0);
2991                 verify(zfs_prop_get(zhp, ZFS_PROP_SHARENFS, shareopts,
2992                     sizeof (shareopts), NULL, NULL, 0, B_FALSE) == 0);
2993                 verify(zfs_prop_get(zhp, ZFS_PROP_SHARESMB, smbshareopts,
2994                     sizeof (smbshareopts), NULL, NULL, 0, B_FALSE) == 0);
2995                 canmount = zfs_prop_get_int(zhp, ZFS_PROP_CANMOUNT);
2996
2997                 if (op == OP_SHARE && strcmp(shareopts, "off") == 0 &&
2998                     strcmp(smbshareopts, "off") == 0) {
2999                         if (!explicit)
3000                                 return (0);
3001
3002                         (void) fprintf(stderr, gettext("cannot share '%s': "
3003                             "legacy share\n"), zfs_get_name(zhp));
3004                         (void) fprintf(stderr, gettext("use share(1M) to "
3005                             "share this filesystem\n"));
3006                         return (1);
3007                 }
3008
3009                 /*
3010                  * We cannot share or mount legacy filesystems. If the
3011                  * shareopts is non-legacy but the mountpoint is legacy, we
3012                  * treat it as a legacy share.
3013                  */
3014                 if (strcmp(mountpoint, "legacy") == 0) {
3015                         if (!explicit)
3016                                 return (0);
3017
3018                         (void) fprintf(stderr, gettext("cannot %s '%s': "
3019                             "legacy mountpoint\n"), cmdname, zfs_get_name(zhp));
3020                         (void) fprintf(stderr, gettext("use %s(1M) to "
3021                             "%s this filesystem\n"), cmdname, cmdname);
3022                         return (1);
3023                 }
3024
3025                 if (strcmp(mountpoint, "none") == 0) {
3026                         if (!explicit)
3027                                 return (0);
3028
3029                         (void) fprintf(stderr, gettext("cannot %s '%s': no "
3030                             "mountpoint set\n"), cmdname, zfs_get_name(zhp));
3031                         return (1);
3032                 }
3033
3034                 /*
3035                  * canmount     explicit        outcome
3036                  * on           no              pass through
3037                  * on           yes             pass through
3038                  * off          no              return 0
3039                  * off          yes             display error, return 1
3040                  * noauto       no              return 0
3041                  * noauto       yes             pass through
3042                  */
3043                 if (canmount == ZFS_CANMOUNT_OFF) {
3044                         if (!explicit)
3045                                 return (0);
3046
3047                         (void) fprintf(stderr, gettext("cannot %s '%s': "
3048                             "'canmount' property is set to 'off'\n"), cmdname,
3049                             zfs_get_name(zhp));
3050                         return (1);
3051                 } else if (canmount == ZFS_CANMOUNT_NOAUTO && !explicit) {
3052                         return (0);
3053                 }
3054
3055                 /*
3056                  * At this point, we have verified that the mountpoint and/or
3057                  * shareopts are appropriate for auto management. If the
3058                  * filesystem is already mounted or shared, return (failing
3059                  * for explicit requests); otherwise mount or share the
3060                  * filesystem.
3061                  */
3062                 switch (op) {
3063                 case OP_SHARE:
3064
3065                         shared_nfs = zfs_is_shared_nfs(zhp, NULL);
3066                         shared_smb = zfs_is_shared_smb(zhp, NULL);
3067
3068                         if (shared_nfs && shared_smb ||
3069                             (shared_nfs && strcmp(shareopts, "on") == 0 &&
3070                             strcmp(smbshareopts, "off") == 0) ||
3071                             (shared_smb && strcmp(smbshareopts, "on") == 0 &&
3072                             strcmp(shareopts, "off") == 0)) {
3073                                 if (!explicit)
3074                                         return (0);
3075
3076                                 (void) fprintf(stderr, gettext("cannot share "
3077                                     "'%s': filesystem already shared\n"),
3078                                     zfs_get_name(zhp));
3079                                 return (1);
3080                         }
3081
3082                         if (!zfs_is_mounted(zhp, NULL) &&
3083                             zfs_mount(zhp, NULL, 0) != 0)
3084                                 return (1);
3085
3086                         if (protocol == NULL) {
3087                                 if (zfs_shareall(zhp) != 0)
3088                                         return (1);
3089                         } else if (strcmp(protocol, "nfs") == 0) {
3090                                 if (zfs_share_nfs(zhp))
3091                                         return (1);
3092                         } else if (strcmp(protocol, "smb") == 0) {
3093                                 if (zfs_share_smb(zhp))
3094                                         return (1);
3095                         } else {
3096                                 (void) fprintf(stderr, gettext("cannot share "
3097                                     "'%s': invalid share type '%s' "
3098                                     "specified\n"),
3099                                     zfs_get_name(zhp), protocol);
3100                                 return (1);
3101                         }
3102
3103                         break;
3104
3105                 case OP_MOUNT:
3106                         if (options == NULL)
3107                                 mnt.mnt_mntopts = "";
3108                         else
3109                                 mnt.mnt_mntopts = (char *)options;
3110
3111                         if (!hasmntopt(&mnt, MNTOPT_REMOUNT) &&
3112                             zfs_is_mounted(zhp, NULL)) {
3113                                 if (!explicit)
3114                                         return (0);
3115
3116                                 (void) fprintf(stderr, gettext("cannot mount "
3117                                     "'%s': filesystem already mounted\n"),
3118                                     zfs_get_name(zhp));
3119                                 return (1);
3120                         }
3121
3122                         if (zfs_mount(zhp, options, flags) != 0)
3123                                 return (1);
3124                         break;
3125                 }
3126         } else {
3127                 assert(op == OP_SHARE);
3128
3129                 /*
3130                  * Ignore any volumes that aren't shared.
3131                  */
3132                 verify(zfs_prop_get(zhp, ZFS_PROP_SHAREISCSI, shareopts,
3133                     sizeof (shareopts), NULL, NULL, 0, B_FALSE) == 0);
3134
3135                 if (strcmp(shareopts, "off") == 0) {
3136                         if (!explicit)
3137                                 return (0);
3138
3139                         (void) fprintf(stderr, gettext("cannot share '%s': "
3140                             "'shareiscsi' property not set\n"),
3141                             zfs_get_name(zhp));
3142                         (void) fprintf(stderr, gettext("set 'shareiscsi' "
3143                             "property or use iscsitadm(1M) to share this "
3144                             "volume\n"));
3145                         return (1);
3146                 }
3147
3148                 if (zfs_is_shared_iscsi(zhp)) {
3149                         if (!explicit)
3150                                 return (0);
3151
3152                         (void) fprintf(stderr, gettext("cannot share "
3153                             "'%s': volume already shared\n"),
3154                             zfs_get_name(zhp));
3155                         return (1);
3156                 }
3157
3158                 if (zfs_share_iscsi(zhp) != 0)
3159                         return (1);
3160         }
3161
3162         return (0);
3163 }
3164
3165 /*
3166  * Reports progress in the form "(current/total)".  Not thread-safe.
3167  */
3168 static void
3169 report_mount_progress(int current, int total)
3170 {
3171         static int len;
3172         static char *reverse = "\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b"
3173             "\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b";
3174         static time_t last_progress_time;
3175         time_t now = time(NULL);
3176
3177         /* report 1..n instead of 0..n-1 */
3178         ++current;
3179
3180         /* display header if we're here for the first time */
3181         if (current == 1) {
3182                 (void) printf(gettext("Mounting ZFS filesystems: "));
3183                 len = 0;
3184         } else if (current != total && last_progress_time + MOUNT_TIME >= now) {
3185                 /* too soon to report again */
3186                 return;
3187         }
3188
3189         last_progress_time = now;
3190
3191         /* back up to prepare for overwriting */
3192         if (len)
3193                 (void) printf("%*.*s", len, len, reverse);
3194
3195         /* We put a newline at the end if this is the last one.  */
3196         len = printf("(%d/%d)%s", current, total, current == total ? "\n" : "");
3197         (void) fflush(stdout);
3198 }
3199
3200 static void
3201 append_options(char *mntopts, char *newopts)
3202 {
3203         int len = strlen(mntopts);
3204
3205         /* original length plus new string to append plus 1 for the comma */
3206         if (len + 1 + strlen(newopts) >= MNT_LINE_MAX) {
3207                 (void) fprintf(stderr, gettext("the opts argument for "
3208                     "'%c' option is too long (more than %d chars)\n"),
3209                     "-o", MNT_LINE_MAX);
3210                 usage(B_FALSE);
3211         }
3212
3213         if (*mntopts)
3214                 mntopts[len++] = ',';
3215
3216         (void) strcpy(&mntopts[len], newopts);
3217 }
3218
3219 static int
3220 share_mount(int op, int argc, char **argv)
3221 {
3222         int do_all = 0;
3223         boolean_t verbose = B_FALSE;
3224         int c, ret = 0;
3225         char *options = NULL;
3226         int types, flags = 0;
3227
3228         /* check options */
3229         while ((c = getopt(argc, argv, op == OP_MOUNT ? ":avo:O" : "a"))
3230             != -1) {
3231                 switch (c) {
3232                 case 'a':
3233                         do_all = 1;
3234                         break;
3235                 case 'v':
3236                         verbose = B_TRUE;
3237                         break;
3238                 case 'o':
3239                         if (*optarg == '\0') {
3240                                 (void) fprintf(stderr, gettext("empty mount "
3241                                     "options (-o) specified\n"));
3242                                 usage(B_FALSE);
3243                         }
3244
3245                         if (options == NULL)
3246                                 options = safe_malloc(MNT_LINE_MAX + 1);
3247
3248                         /* option validation is done later */
3249                         append_options(options, optarg);
3250                         break;
3251
3252                 case 'O':
3253                         flags |= MS_OVERLAY;
3254                         break;
3255                 case ':':
3256                         (void) fprintf(stderr, gettext("missing argument for "
3257                             "'%c' option\n"), optopt);
3258                         usage(B_FALSE);
3259                         break;
3260                 case '?':
3261                         (void) fprintf(stderr, gettext("invalid option '%c'\n"),
3262                             optopt);
3263                         usage(B_FALSE);
3264                 }
3265         }
3266
3267         argc -= optind;
3268         argv += optind;
3269
3270         /* check number of arguments */
3271         if (do_all) {
3272                 zfs_handle_t **dslist = NULL;
3273                 size_t i, count = 0;
3274                 char *protocol = NULL;
3275
3276                 if (op == OP_MOUNT) {
3277                         types = ZFS_TYPE_FILESYSTEM;
3278                 } else if (argc > 0) {
3279                         if (strcmp(argv[0], "nfs") == 0 ||
3280                             strcmp(argv[0], "smb") == 0) {
3281                                 types = ZFS_TYPE_FILESYSTEM;
3282                         } else if (strcmp(argv[0], "iscsi") == 0) {
3283                                 types = ZFS_TYPE_VOLUME;
3284                         } else {
3285                                 (void) fprintf(stderr, gettext("share type "
3286                                     "must be 'nfs', 'smb' or 'iscsi'\n"));
3287                                 usage(B_FALSE);
3288                         }
3289                         protocol = argv[0];
3290                         argc--;
3291                         argv++;
3292                 } else {
3293                         types = ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME;
3294                 }
3295
3296                 if (argc != 0) {
3297                         (void) fprintf(stderr, gettext("too many arguments\n"));
3298                         usage(B_FALSE);
3299                 }
3300
3301                 get_all_datasets(types, &dslist, &count, verbose);
3302
3303                 if (count == 0)
3304                         return (0);
3305
3306                 qsort(dslist, count, sizeof (void *), dataset_cmp);
3307
3308                 for (i = 0; i < count; i++) {
3309                         if (verbose)
3310                                 report_mount_progress(i, count);
3311
3312                         if (share_mount_one(dslist[i], op, flags, protocol,
3313                             B_FALSE, options) != 0)
3314                                 ret = 1;
3315                         zfs_close(dslist[i]);
3316                 }
3317
3318                 free(dslist);
3319         } else if (argc == 0) {
3320                 struct mnttab entry;
3321
3322                 if ((op == OP_SHARE) || (options != NULL)) {
3323                         (void) fprintf(stderr, gettext("missing filesystem "
3324                             "argument (specify -a for all)\n"));
3325                         usage(B_FALSE);
3326                 }
3327
3328                 /*
3329                  * When mount is given no arguments, go through /etc/mnttab and
3330                  * display any active ZFS mounts.  We hide any snapshots, since
3331                  * they are controlled automatically.
3332                  */
3333                 rewind(mnttab_file);
3334                 while (getmntent(mnttab_file, &entry) == 0) {
3335                         if (strcmp(entry.mnt_fstype, MNTTYPE_ZFS) != 0 ||
3336                             strchr(entry.mnt_special, '@') != NULL)
3337                                 continue;
3338
3339                         (void) printf("%-30s  %s\n", entry.mnt_special,
3340                             entry.mnt_mountp);
3341                 }
3342
3343         } else {
3344                 zfs_handle_t *zhp;
3345
3346                 types = ZFS_TYPE_FILESYSTEM;
3347                 if (op == OP_SHARE)
3348                         types |= ZFS_TYPE_VOLUME;
3349
3350                 if (argc > 1) {
3351                         (void) fprintf(stderr,
3352                             gettext("too many arguments\n"));
3353                         usage(B_FALSE);
3354                 }
3355
3356                 if ((zhp = zfs_open(g_zfs, argv[0], types)) == NULL) {
3357                         ret = 1;
3358                 } else {
3359                         ret = share_mount_one(zhp, op, flags, NULL, B_TRUE,
3360                             options);
3361                         zfs_close(zhp);
3362                 }
3363         }
3364
3365         return (ret);
3366 }
3367
3368 /*
3369  * zfs mount -a [nfs | iscsi]
3370  * zfs mount filesystem
3371  *
3372  * Mount all filesystems, or mount the given filesystem.
3373  */
3374 static int
3375 zfs_do_mount(int argc, char **argv)
3376 {
3377         return (share_mount(OP_MOUNT, argc, argv));
3378 }
3379
3380 /*
3381  * zfs share -a [nfs | iscsi | smb]
3382  * zfs share filesystem
3383  *
3384  * Share all filesystems, or share the given filesystem.
3385  */
3386 static int
3387 zfs_do_share(int argc, char **argv)
3388 {
3389         return (share_mount(OP_SHARE, argc, argv));
3390 }
3391
3392 typedef struct unshare_unmount_node {
3393         zfs_handle_t    *un_zhp;
3394         char            *un_mountp;
3395         uu_avl_node_t   un_avlnode;
3396 } unshare_unmount_node_t;
3397
3398 /* ARGSUSED */
3399 static int
3400 unshare_unmount_compare(const void *larg, const void *rarg, void *unused)
3401 {
3402         const unshare_unmount_node_t *l = larg;
3403         const unshare_unmount_node_t *r = rarg;
3404
3405         return (strcmp(l->un_mountp, r->un_mountp));
3406 }
3407
3408 /*
3409  * Convenience routine used by zfs_do_umount() and manual_unmount().  Given an
3410  * absolute path, find the entry /etc/mnttab, verify that its a ZFS filesystem,
3411  * and unmount it appropriately.
3412  */
3413 static int
3414 unshare_unmount_path(int op, char *path, int flags, boolean_t is_manual)
3415 {
3416         zfs_handle_t *zhp;
3417         int ret;
3418         struct stat64 statbuf;
3419         struct extmnttab entry;
3420         const char *cmdname = (op == OP_SHARE) ? "unshare" : "unmount";
3421         ino_t path_inode;
3422
3423         /*
3424          * Search for the path in /etc/mnttab.  Rather than looking for the
3425          * specific path, which can be fooled by non-standard paths (i.e. ".."
3426          * or "//"), we stat() the path and search for the corresponding
3427          * (major,minor) device pair.
3428          */
3429         if (stat64(path, &statbuf) != 0) {
3430                 (void) fprintf(stderr, gettext("cannot %s '%s': %s\n"),
3431                     cmdname, path, strerror(errno));
3432                 return (1);
3433         }
3434         path_inode = statbuf.st_ino;
3435
3436         /*
3437          * Search for the given (major,minor) pair in the mount table.
3438          */
3439         rewind(mnttab_file);
3440         while ((ret = getextmntent(mnttab_file, &entry, 0)) == 0) {
3441                 if (entry.mnt_major == major(statbuf.st_dev) &&
3442                     entry.mnt_minor == minor(statbuf.st_dev))
3443                         break;
3444         }
3445         if (ret != 0) {
3446                 if (op == OP_SHARE) {
3447                         (void) fprintf(stderr, gettext("cannot %s '%s': not "
3448                             "currently mounted\n"), cmdname, path);
3449                         return (1);
3450                 }
3451                 (void) fprintf(stderr, gettext("warning: %s not in mnttab\n"),
3452                     path);
3453                 if ((ret = umount2(path, flags)) != 0)
3454                         (void) fprintf(stderr, gettext("%s: %s\n"), path,
3455                             strerror(errno));
3456                 return (ret != 0);
3457         }
3458
3459         if (strcmp(entry.mnt_fstype, MNTTYPE_ZFS) != 0) {
3460                 (void) fprintf(stderr, gettext("cannot %s '%s': not a ZFS "
3461                     "filesystem\n"), cmdname, path);
3462                 return (1);
3463         }
3464
3465         if ((zhp = zfs_open(g_zfs, entry.mnt_special,
3466             ZFS_TYPE_FILESYSTEM)) == NULL)
3467                 return (1);
3468
3469
3470         ret = 1;
3471         if (op == OP_SHARE) {
3472                 char nfs_mnt_prop[ZFS_MAXPROPLEN];
3473                 char smbshare_prop[ZFS_MAXPROPLEN];
3474
3475                 verify(zfs_prop_get(zhp, ZFS_PROP_SHARENFS, nfs_mnt_prop,
3476                     sizeof (nfs_mnt_prop), NULL, NULL, 0, B_FALSE) == 0);
3477                 verify(zfs_prop_get(zhp, ZFS_PROP_SHARESMB, smbshare_prop,
3478                     sizeof (smbshare_prop), NULL, NULL, 0, B_FALSE) == 0);
3479
3480                 if (strcmp(nfs_mnt_prop, "off") == 0 &&
3481                     strcmp(smbshare_prop, "off") == 0) {
3482                         (void) fprintf(stderr, gettext("cannot unshare "
3483                             "'%s': legacy share\n"), path);
3484                         (void) fprintf(stderr, gettext("use "
3485                             "unshare(1M) to unshare this filesystem\n"));
3486                 } else if (!zfs_is_shared(zhp)) {
3487                         (void) fprintf(stderr, gettext("cannot unshare '%s': "
3488                             "not currently shared\n"), path);
3489                 } else {
3490                         ret = zfs_unshareall_bypath(zhp, path);
3491                 }
3492         } else {
3493                 char mtpt_prop[ZFS_MAXPROPLEN];
3494
3495                 verify(zfs_prop_get(zhp, ZFS_PROP_MOUNTPOINT, mtpt_prop,
3496                     sizeof (mtpt_prop), NULL, NULL, 0, B_FALSE) == 0);
3497
3498                 if (stat64(entry.mnt_mountp, &statbuf) != 0) {
3499                         (void) fprintf(stderr, gettext("cannot %s '%s': %s\n"),
3500                             cmdname, path, strerror(errno));
3501                 } else if (statbuf.st_ino != path_inode) {
3502                         (void) fprintf(stderr, gettext("cannot "
3503                             "unmount '%s': not a mountpoint\n"), path);
3504                 } else if (is_manual) {
3505                         ret = zfs_unmount(zhp, NULL, flags);
3506                 } else if (strcmp(mtpt_prop, "legacy") == 0) {
3507                         (void) fprintf(stderr, gettext("cannot unmount "
3508                             "'%s': legacy mountpoint\n"),
3509                             zfs_get_name(zhp));
3510                         (void) fprintf(stderr, gettext("use umount(1M) "
3511                             "to unmount this filesystem\n"));
3512                 } else {
3513                         ret = zfs_unmountall(zhp, flags);
3514                 }
3515         }
3516
3517         zfs_close(zhp);
3518
3519         return (ret != 0);
3520 }
3521
3522 /*
3523  * Generic callback for unsharing or unmounting a filesystem.
3524  */
3525 static int
3526 unshare_unmount(int op, int argc, char **argv)
3527 {
3528         int do_all = 0;
3529         int flags = 0;
3530         int ret = 0;
3531         int types, c;
3532         zfs_handle_t *zhp;
3533         char nfsiscsi_mnt_prop[ZFS_MAXPROPLEN];
3534         char sharesmb[ZFS_MAXPROPLEN];
3535
3536         /* check options */
3537         while ((c = getopt(argc, argv, op == OP_SHARE ? "a" : "af")) != -1) {
3538                 switch (c) {
3539                 case 'a':
3540                         do_all = 1;
3541                         break;
3542                 case 'f':
3543                         flags = MS_FORCE;
3544                         break;
3545                 case '?':
3546                         (void) fprintf(stderr, gettext("invalid option '%c'\n"),
3547                             optopt);
3548                         usage(B_FALSE);
3549                 }
3550         }
3551
3552         argc -= optind;
3553         argv += optind;
3554
3555         if (do_all) {
3556                 /*
3557                  * We could make use of zfs_for_each() to walk all datasets in
3558                  * the system, but this would be very inefficient, especially
3559                  * since we would have to linearly search /etc/mnttab for each
3560                  * one.  Instead, do one pass through /etc/mnttab looking for
3561                  * zfs entries and call zfs_unmount() for each one.
3562                  *
3563                  * Things get a little tricky if the administrator has created
3564                  * mountpoints beneath other ZFS filesystems.  In this case, we
3565                  * have to unmount the deepest filesystems first.  To accomplish
3566                  * this, we place all the mountpoints in an AVL tree sorted by
3567                  * the special type (dataset name), and walk the result in
3568                  * reverse to make sure to get any snapshots first.
3569                  */
3570                 struct mnttab entry;
3571                 uu_avl_pool_t *pool;
3572                 uu_avl_t *tree;
3573                 unshare_unmount_node_t *node;
3574                 uu_avl_index_t idx;
3575                 uu_avl_walk_t *walk;
3576
3577                 if (argc != 0) {
3578                         (void) fprintf(stderr, gettext("too many arguments\n"));
3579                         usage(B_FALSE);
3580                 }
3581
3582                 if ((pool = uu_avl_pool_create("unmount_pool",
3583                     sizeof (unshare_unmount_node_t),
3584                     offsetof(unshare_unmount_node_t, un_avlnode),
3585                     unshare_unmount_compare,
3586                     UU_DEFAULT)) == NULL) {
3587                         (void) fprintf(stderr, gettext("internal error: "
3588                             "out of memory\n"));
3589                         exit(1);
3590                 }
3591
3592                 if ((tree = uu_avl_create(pool, NULL, UU_DEFAULT)) == NULL) {
3593                         (void) fprintf(stderr, gettext("internal error: "
3594                             "out of memory\n"));
3595                         exit(1);
3596                 }
3597
3598                 rewind(mnttab_file);
3599                 while (getmntent(mnttab_file, &entry) == 0) {
3600
3601                         /* ignore non-ZFS entries */
3602                         if (strcmp(entry.mnt_fstype, MNTTYPE_ZFS) != 0)
3603                                 continue;
3604
3605                         /* ignore snapshots */
3606                         if (strchr(entry.mnt_special, '@') != NULL)
3607                                 continue;
3608
3609                         if ((zhp = zfs_open(g_zfs, entry.mnt_special,
3610                             ZFS_TYPE_FILESYSTEM)) == NULL) {
3611                                 ret = 1;
3612                                 continue;
3613                         }
3614
3615                         switch (op) {
3616                         case OP_SHARE:
3617                                 verify(zfs_prop_get(zhp, ZFS_PROP_SHARENFS,
3618                                     nfsiscsi_mnt_prop,
3619                                     sizeof (nfsiscsi_mnt_prop),
3620                                     NULL, NULL, 0, B_FALSE) == 0);
3621                                 if (strcmp(nfsiscsi_mnt_prop, "off") != 0)
3622                                         break;
3623                                 verify(zfs_prop_get(zhp, ZFS_PROP_SHARESMB,
3624                                     nfsiscsi_mnt_prop,
3625                                     sizeof (nfsiscsi_mnt_prop),
3626                                     NULL, NULL, 0, B_FALSE) == 0);
3627                                 if (strcmp(nfsiscsi_mnt_prop, "off") == 0)
3628                                         continue;
3629                                 break;
3630                         case OP_MOUNT:
3631                                 /* Ignore legacy mounts */
3632                                 verify(zfs_prop_get(zhp, ZFS_PROP_MOUNTPOINT,
3633                                     nfsiscsi_mnt_prop,
3634                                     sizeof (nfsiscsi_mnt_prop),
3635                                     NULL, NULL, 0, B_FALSE) == 0);
3636                                 if (strcmp(nfsiscsi_mnt_prop, "legacy") == 0)
3637                                         continue;
3638                                 /* Ignore canmount=noauto mounts */
3639                                 if (zfs_prop_get_int(zhp, ZFS_PROP_CANMOUNT) ==
3640                                     ZFS_CANMOUNT_NOAUTO)
3641                                         continue;
3642                         default:
3643                                 break;
3644                         }
3645
3646                         node = safe_malloc(sizeof (unshare_unmount_node_t));
3647                         node->un_zhp = zhp;
3648
3649                         if ((node->un_mountp = strdup(entry.mnt_mountp)) ==
3650                             NULL) {
3651                                 (void) fprintf(stderr, gettext("internal error:"
3652                                     " out of memory\n"));
3653                                 exit(1);
3654                         }
3655
3656                         uu_avl_node_init(node, &node->un_avlnode, pool);
3657
3658                         if (uu_avl_find(tree, node, NULL, &idx) == NULL) {
3659                                 uu_avl_insert(tree, node, idx);
3660                         } else {
3661                                 zfs_close(node->un_zhp);
3662                                 free(node->un_mountp);
3663                                 free(node);
3664                         }
3665                 }
3666
3667                 /*
3668                  * Walk the AVL tree in reverse, unmounting each filesystem and
3669                  * removing it from the AVL tree in the process.
3670                  */
3671                 if ((walk = uu_avl_walk_start(tree,
3672                     UU_WALK_REVERSE | UU_WALK_ROBUST)) == NULL) {
3673                         (void) fprintf(stderr,
3674                             gettext("internal error: out of memory"));
3675                         exit(1);
3676                 }
3677
3678                 while ((node = uu_avl_walk_next(walk)) != NULL) {
3679                         uu_avl_remove(tree, node);
3680
3681                         switch (op) {
3682                         case OP_SHARE:
3683                                 if (zfs_unshareall_bypath(node->un_zhp,
3684                                     node->un_mountp) != 0)
3685                                         ret = 1;
3686                                 break;
3687
3688                         case OP_MOUNT:
3689                                 if (zfs_unmount(node->un_zhp,
3690                                     node->un_mountp, flags) != 0)
3691                                         ret = 1;
3692                                 break;
3693                         }
3694
3695                         zfs_close(node->un_zhp);
3696                         free(node->un_mountp);
3697                         free(node);
3698                 }
3699
3700                 uu_avl_walk_end(walk);
3701                 uu_avl_destroy(tree);
3702                 uu_avl_pool_destroy(pool);
3703
3704                 if (op == OP_SHARE) {
3705                         /*
3706                          * Finally, unshare any volumes shared via iSCSI.
3707                          */
3708                         zfs_handle_t **dslist = NULL;
3709                         size_t i, count = 0;
3710
3711                         get_all_datasets(ZFS_TYPE_VOLUME, &dslist, &count,
3712                             B_FALSE);
3713
3714                         if (count != 0) {
3715                                 qsort(dslist, count, sizeof (void *),
3716                                     dataset_cmp);
3717
3718                                 for (i = 0; i < count; i++) {
3719                                         if (zfs_unshare_iscsi(dslist[i]) != 0)
3720                                                 ret = 1;
3721                                         zfs_close(dslist[i]);
3722                                 }
3723
3724                                 free(dslist);
3725                         }
3726                 }
3727         } else {
3728                 if (argc != 1) {
3729                         if (argc == 0)
3730                                 (void) fprintf(stderr,
3731                                     gettext("missing filesystem argument\n"));
3732                         else
3733                                 (void) fprintf(stderr,
3734                                     gettext("too many arguments\n"));
3735                         usage(B_FALSE);
3736                 }
3737
3738                 /*
3739                  * We have an argument, but it may be a full path or a ZFS
3740                  * filesystem.  Pass full paths off to unmount_path() (shared by
3741                  * manual_unmount), otherwise open the filesystem and pass to
3742                  * zfs_unmount().
3743                  */
3744                 if (argv[0][0] == '/')
3745                         return (unshare_unmount_path(op, argv[0],
3746                             flags, B_FALSE));
3747
3748                 types = ZFS_TYPE_FILESYSTEM;
3749                 if (op == OP_SHARE)
3750                         types |= ZFS_TYPE_VOLUME;
3751
3752                 if ((zhp = zfs_open(g_zfs, argv[0], types)) == NULL)
3753                         return (1);
3754
3755                 if (zfs_get_type(zhp) == ZFS_TYPE_FILESYSTEM) {
3756                         verify(zfs_prop_get(zhp, op == OP_SHARE ?
3757                             ZFS_PROP_SHARENFS : ZFS_PROP_MOUNTPOINT,
3758                             nfsiscsi_mnt_prop, sizeof (nfsiscsi_mnt_prop), NULL,
3759                             NULL, 0, B_FALSE) == 0);
3760
3761                         switch (op) {
3762                         case OP_SHARE:
3763                                 verify(zfs_prop_get(zhp, ZFS_PROP_SHARENFS,
3764                                     nfsiscsi_mnt_prop,
3765                                     sizeof (nfsiscsi_mnt_prop),
3766                                     NULL, NULL, 0, B_FALSE) == 0);
3767                                 verify(zfs_prop_get(zhp, ZFS_PROP_SHARESMB,
3768                                     sharesmb, sizeof (sharesmb), NULL, NULL,
3769                                     0, B_FALSE) == 0);
3770
3771                                 if (strcmp(nfsiscsi_mnt_prop, "off") == 0 &&
3772                                     strcmp(sharesmb, "off") == 0) {
3773                                         (void) fprintf(stderr, gettext("cannot "
3774                                             "unshare '%s': legacy share\n"),
3775                                             zfs_get_name(zhp));
3776                                         (void) fprintf(stderr, gettext("use "
3777                                             "unshare(1M) to unshare this "
3778                                             "filesystem\n"));
3779                                         ret = 1;
3780                                 } else if (!zfs_is_shared(zhp)) {
3781                                         (void) fprintf(stderr, gettext("cannot "
3782                                             "unshare '%s': not currently "
3783                                             "shared\n"), zfs_get_name(zhp));
3784                                         ret = 1;
3785                                 } else if (zfs_unshareall(zhp) != 0) {
3786                                         ret = 1;
3787                                 }
3788                                 break;
3789
3790                         case OP_MOUNT:
3791                                 if (strcmp(nfsiscsi_mnt_prop, "legacy") == 0) {
3792                                         (void) fprintf(stderr, gettext("cannot "
3793                                             "unmount '%s': legacy "
3794                                             "mountpoint\n"), zfs_get_name(zhp));
3795                                         (void) fprintf(stderr, gettext("use "
3796                                             "umount(1M) to unmount this "
3797                                             "filesystem\n"));
3798                                         ret = 1;
3799                                 } else if (!zfs_is_mounted(zhp, NULL)) {
3800                                         (void) fprintf(stderr, gettext("cannot "
3801                                             "unmount '%s': not currently "
3802                                             "mounted\n"),
3803                                             zfs_get_name(zhp));
3804                                         ret = 1;
3805                                 } else if (zfs_unmountall(zhp, flags) != 0) {
3806                                         ret = 1;
3807                                 }
3808                                 break;
3809                         }
3810                 } else {
3811                         assert(op == OP_SHARE);
3812
3813                         verify(zfs_prop_get(zhp, ZFS_PROP_SHAREISCSI,
3814                             nfsiscsi_mnt_prop, sizeof (nfsiscsi_mnt_prop),
3815                             NULL, NULL, 0, B_FALSE) == 0);
3816
3817                         if (strcmp(nfsiscsi_mnt_prop, "off") == 0) {
3818                                 (void) fprintf(stderr, gettext("cannot unshare "
3819                                     "'%s': 'shareiscsi' property not set\n"),
3820                                     zfs_get_name(zhp));
3821                                 (void) fprintf(stderr, gettext("set "
3822                                     "'shareiscsi' property or use "
3823                                     "iscsitadm(1M) to share this volume\n"));
3824                                 ret = 1;
3825                         } else if (!zfs_is_shared_iscsi(zhp)) {
3826                                 (void) fprintf(stderr, gettext("cannot "
3827                                     "unshare '%s': not currently shared\n"),
3828                                     zfs_get_name(zhp));
3829                                 ret = 1;
3830                         } else if (zfs_unshare_iscsi(zhp) != 0) {
3831                                 ret = 1;
3832                         }
3833                 }
3834
3835                 zfs_close(zhp);
3836         }
3837
3838         return (ret);
3839 }
3840
3841 /*
3842  * zfs unmount -a
3843  * zfs unmount filesystem
3844  *
3845  * Unmount all filesystems, or a specific ZFS filesystem.
3846  */
3847 static int
3848 zfs_do_unmount(int argc, char **argv)
3849 {
3850         return (unshare_unmount(OP_MOUNT, argc, argv));
3851 }
3852
3853 /*
3854  * zfs unshare -a
3855  * zfs unshare filesystem
3856  *
3857  * Unshare all filesystems, or a specific ZFS filesystem.
3858  */
3859 static int
3860 zfs_do_unshare(int argc, char **argv)
3861 {
3862         return (unshare_unmount(OP_SHARE, argc, argv));
3863 }
3864
3865 /*
3866  * Called when invoked as /etc/fs/zfs/mount.  Do the mount if the mountpoint is
3867  * 'legacy'.  Otherwise, complain that use should be using 'zfs mount'.
3868  */
3869 static int
3870 manual_mount(int argc, char **argv)
3871 {
3872         zfs_handle_t *zhp;
3873         char mountpoint[ZFS_MAXPROPLEN];
3874         char mntopts[MNT_LINE_MAX] = { '\0' };
3875         int ret;
3876         int c;
3877         int flags = 0;
3878         char *dataset, *path;
3879
3880         /* check options */
3881         while ((c = getopt(argc, argv, ":mo:O")) != -1) {
3882                 switch (c) {
3883                 case 'o':
3884                         (void) strlcpy(mntopts, optarg, sizeof (mntopts));
3885                         break;
3886                 case 'O':
3887                         flags |= MS_OVERLAY;
3888                         break;
3889                 case 'm':
3890                         flags |= MS_NOMNTTAB;
3891                         break;
3892                 case ':':
3893                         (void) fprintf(stderr, gettext("missing argument for "
3894                             "'%c' option\n"), optopt);
3895                         usage(B_FALSE);
3896                         break;
3897                 case '?':
3898                         (void) fprintf(stderr, gettext("invalid option '%c'\n"),
3899                             optopt);
3900                         (void) fprintf(stderr, gettext("usage: mount [-o opts] "
3901                             "<path>\n"));
3902                         return (2);
3903                 }
3904         }
3905
3906         argc -= optind;
3907         argv += optind;
3908
3909         /* check that we only have two arguments */
3910         if (argc != 2) {
3911                 if (argc == 0)
3912                         (void) fprintf(stderr, gettext("missing dataset "
3913                             "argument\n"));
3914                 else if (argc == 1)
3915                         (void) fprintf(stderr,
3916                             gettext("missing mountpoint argument\n"));
3917                 else
3918                         (void) fprintf(stderr, gettext("too many arguments\n"));
3919                 (void) fprintf(stderr, "usage: mount <dataset> <mountpoint>\n");
3920                 return (2);
3921         }
3922
3923         dataset = argv[0];
3924         path = argv[1];
3925
3926         /* try to open the dataset */
3927         if ((zhp = zfs_open(g_zfs, dataset, ZFS_TYPE_FILESYSTEM)) == NULL)
3928                 return (1);
3929
3930         (void) zfs_prop_get(zhp, ZFS_PROP_MOUNTPOINT, mountpoint,
3931             sizeof (mountpoint), NULL, NULL, 0, B_FALSE);
3932
3933         /* check for legacy mountpoint and complain appropriately */
3934         ret = 0;
3935         if (strcmp(mountpoint, ZFS_MOUNTPOINT_LEGACY) == 0) {
3936                 if (mount(dataset, path, MS_OPTIONSTR | flags, MNTTYPE_ZFS,
3937                     NULL, 0, mntopts, sizeof (mntopts)) != 0) {
3938                         (void) fprintf(stderr, gettext("mount failed: %s\n"),
3939                             strerror(errno));
3940                         ret = 1;
3941                 }
3942         } else {
3943                 (void) fprintf(stderr, gettext("filesystem '%s' cannot be "
3944                     "mounted using 'mount -F zfs'\n"), dataset);
3945                 (void) fprintf(stderr, gettext("Use 'zfs set mountpoint=%s' "
3946                     "instead.\n"), path);
3947                 (void) fprintf(stderr, gettext("If you must use 'mount -F zfs' "
3948                     "or /etc/vfstab, use 'zfs set mountpoint=legacy'.\n"));
3949                 (void) fprintf(stderr, gettext("See zfs(1M) for more "
3950                     "information.\n"));
3951                 ret = 1;
3952         }
3953
3954         return (ret);
3955 }
3956
3957 /*
3958  * Called when invoked as /etc/fs/zfs/umount.  Unlike a manual mount, we allow
3959  * unmounts of non-legacy filesystems, as this is the dominant administrative
3960  * interface.
3961  */
3962 static int
3963 manual_unmount(int argc, char **argv)
3964 {
3965         int flags = 0;
3966         int c;
3967
3968         /* check options */
3969         while ((c = getopt(argc, argv, "f")) != -1) {
3970                 switch (c) {
3971                 case 'f':
3972                         flags = MS_FORCE;
3973                         break;
3974                 case '?':
3975                         (void) fprintf(stderr, gettext("invalid option '%c'\n"),
3976                             optopt);
3977                         (void) fprintf(stderr, gettext("usage: unmount [-f] "
3978                             "<path>\n"));
3979                         return (2);
3980                 }
3981         }
3982
3983         argc -= optind;
3984         argv += optind;
3985
3986         /* check arguments */
3987         if (argc != 1) {
3988                 if (argc == 0)
3989                         (void) fprintf(stderr, gettext("missing path "
3990                             "argument\n"));
3991                 else
3992                         (void) fprintf(stderr, gettext("too many arguments\n"));
3993                 (void) fprintf(stderr, gettext("usage: unmount [-f] <path>\n"));
3994                 return (2);
3995         }
3996
3997         return (unshare_unmount_path(OP_MOUNT, argv[0], flags, B_TRUE));
3998 }
3999
4000 static int
4001 volcheck(zpool_handle_t *zhp, void *data)
4002 {
4003         boolean_t isinit = *((boolean_t *)data);
4004
4005         if (isinit)
4006                 return (zpool_create_zvol_links(zhp));
4007         else
4008                 return (zpool_remove_zvol_links(zhp));
4009 }
4010
4011 /*
4012  * Iterate over all pools in the system and either create or destroy /dev/zvol
4013  * links, depending on the value of 'isinit'.
4014  */
4015 static int
4016 do_volcheck(boolean_t isinit)
4017 {
4018         return (zpool_iter(g_zfs, volcheck, &isinit) ? 1 : 0);
4019 }
4020
4021 static int
4022 find_command_idx(char *command, int *idx)
4023 {
4024         int i;
4025
4026         for (i = 0; i < NCOMMAND; i++) {
4027                 if (command_table[i].name == NULL)
4028                         continue;
4029
4030                 if (strcmp(command, command_table[i].name) == 0) {
4031                         *idx = i;
4032                         return (0);
4033                 }
4034         }
4035         return (1);
4036 }
4037
4038 int
4039 main(int argc, char **argv)
4040 {
4041         int ret;
4042         int i;
4043         char *progname;
4044         char *cmdname;
4045
4046         (void) setlocale(LC_ALL, "");
4047         (void) textdomain(TEXT_DOMAIN);
4048
4049         opterr = 0;
4050
4051         if ((g_zfs = libzfs_init()) == NULL) {
4052                 (void) fprintf(stderr, gettext("internal error: failed to "
4053                     "initialize ZFS library\n"));
4054                 return (1);
4055         }
4056
4057         zpool_set_history_str("zfs", argc, argv, history_str);
4058         verify(zpool_stage_history(g_zfs, history_str) == 0);
4059
4060         libzfs_print_on_error(g_zfs, B_TRUE);
4061
4062         if ((mnttab_file = fopen(MNTTAB, "r")) == NULL) {
4063                 (void) fprintf(stderr, gettext("internal error: unable to "
4064                     "open %s\n"), MNTTAB);
4065                 return (1);
4066         }
4067
4068         /*
4069          * This command also doubles as the /etc/fs mount and unmount program.
4070          * Determine if we should take this behavior based on argv[0].
4071          */
4072         progname = basename(argv[0]);
4073         if (strcmp(progname, "mount") == 0) {
4074                 ret = manual_mount(argc, argv);
4075         } else if (strcmp(progname, "umount") == 0) {
4076                 ret = manual_unmount(argc, argv);
4077         } else {
4078                 /*
4079                  * Make sure the user has specified some command.
4080                  */
4081                 if (argc < 2) {
4082                         (void) fprintf(stderr, gettext("missing command\n"));
4083                         usage(B_FALSE);
4084                 }
4085
4086                 cmdname = argv[1];
4087
4088                 /*
4089                  * The 'umount' command is an alias for 'unmount'
4090                  */
4091                 if (strcmp(cmdname, "umount") == 0)
4092                         cmdname = "unmount";
4093
4094                 /*
4095                  * The 'recv' command is an alias for 'receive'
4096                  */
4097                 if (strcmp(cmdname, "recv") == 0)
4098                         cmdname = "receive";
4099
4100                 /*
4101                  * Special case '-?'
4102                  */
4103                 if (strcmp(cmdname, "-?") == 0)
4104                         usage(B_TRUE);
4105
4106                 /*
4107                  * 'volinit' and 'volfini' do not appear in the usage message,
4108                  * so we have to special case them here.
4109                  */
4110                 if (strcmp(cmdname, "volinit") == 0)
4111                         return (do_volcheck(B_TRUE));
4112                 else if (strcmp(cmdname, "volfini") == 0)
4113                         return (do_volcheck(B_FALSE));
4114
4115                 /*
4116                  * Run the appropriate command.
4117                  */
4118                 if (find_command_idx(cmdname, &i) == 0) {
4119                         current_command = &command_table[i];
4120                         ret = command_table[i].func(argc - 1, argv + 1);
4121                 } else if (strchr(cmdname, '=') != NULL) {
4122                         verify(find_command_idx("set", &i) == 0);
4123                         current_command = &command_table[i];
4124                         ret = command_table[i].func(argc, argv);
4125                 } else {
4126                         (void) fprintf(stderr, gettext("unrecognized "
4127                             "command '%s'\n"), cmdname);
4128                         usage(B_FALSE);
4129                 }
4130         }
4131
4132         (void) fclose(mnttab_file);
4133
4134         libzfs_fini(g_zfs);
4135
4136         /*
4137          * The 'ZFS_ABORT' environment variable causes us to dump core on exit
4138          * for the purposes of running ::findleaks.
4139          */
4140         if (getenv("ZFS_ABORT") != NULL) {
4141                 (void) printf("dumping core by request\n");
4142                 abort();
4143         }
4144
4145         return (ret);
4146 }