cmd/zfs/zfs_main.c

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21
  22 /*
  23  * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
  24  */
  25
  26 #include <assert.h>
  27 #include <ctype.h>
  28 #include <errno.h>
  29 #include <libgen.h>
  30 #include <libintl.h>
  31 #include <libuutil.h>
  32 #include <libnvpair.h>
  33 #include <locale.h>
  34 #include <stddef.h>
  35 #include <stdio.h>
  36 #include <stdlib.h>
  37 #include <strings.h>
  38 #include <unistd.h>
  39 #include <fcntl.h>
  40 #include <zone.h>
  41 #include <grp.h>
  42 #include <pwd.h>
  43 #include <signal.h>
  44 #include <sys/mkdev.h>
  45 #include <sys/mntent.h>
  46 #include <sys/mnttab.h>
  47 #include <sys/mount.h>
  48 #include <sys/stat.h>
  49 #include <sys/fs/zfs.h>
  50 #include <sys/types.h>
  51 #include <time.h>
  52
  53 #include <libzfs.h>
  54 #include <libuutil.h>
  55
  56 #include "zfs_iter.h"
  57 #include "zfs_util.h"
  58 #include "zfs_comutil.h"
  59
  60 libzfs_handle_t *g_zfs;
  61
  62 static FILE *mnttab_file;
  63 static char history_str[HIS_MAX_RECORD_LEN];
  64 const char *pypath = "/usr/lib/zfs/pyzfs.py";
  65
  66 static int zfs_do_clone(int argc, char **argv);
  67 static int zfs_do_create(int argc, char **argv);
  68 static int zfs_do_destroy(int argc, char **argv);
  69 static int zfs_do_get(int argc, char **argv);
  70 static int zfs_do_inherit(int argc, char **argv);
  71 static int zfs_do_list(int argc, char **argv);
  72 static int zfs_do_mount(int argc, char **argv);
  73 static int zfs_do_rename(int argc, char **argv);
  74 static int zfs_do_rollback(int argc, char **argv);
  75 static int zfs_do_set(int argc, char **argv);
  76 static int zfs_do_upgrade(int argc, char **argv);
  77 static int zfs_do_snapshot(int argc, char **argv);
  78 static int zfs_do_unmount(int argc, char **argv);
  79 static int zfs_do_share(int argc, char **argv);
  80 static int zfs_do_unshare(int argc, char **argv);
  81 static int zfs_do_send(int argc, char **argv);
  82 static int zfs_do_receive(int argc, char **argv);
  83 static int zfs_do_promote(int argc, char **argv);
  84 static int zfs_do_userspace(int argc, char **argv);
  85 static int zfs_do_python(int argc, char **argv);
  86 static int zfs_do_hold(int argc, char **argv);
  87 static int zfs_do_release(int argc, char **argv);
  88 static int zfs_do_diff(int argc, char **argv);
  89
  90 /*
  91  * Enable a reasonable set of defaults for libumem debugging on DEBUG builds.
  92  */
  93
  94 #ifdef DEBUG
  95 const char *
  96 _umem_debug_init(void)
  97 {
  98         return ("default,verbose"); /* $UMEM_DEBUG setting */
  99 }
 100
 101 const char *
 102 _umem_logging_init(void)
 103 {
 104         return ("fail,contents"); /* $UMEM_LOGGING setting */
 105 }
 106 #endif
 107
 108 typedef enum {
 109         HELP_CLONE,
 110         HELP_CREATE,
 111         HELP_DESTROY,
 112         HELP_GET,
 113         HELP_INHERIT,
 114         HELP_UPGRADE,
 115         HELP_LIST,
 116         HELP_MOUNT,
 117         HELP_PROMOTE,
 118         HELP_RECEIVE,
 119         HELP_RENAME,
 120         HELP_ROLLBACK,
 121         HELP_SEND,
 122         HELP_SET,
 123         HELP_SHARE,
 124         HELP_SNAPSHOT,
 125         HELP_UNMOUNT,
 126         HELP_UNSHARE,
 127         HELP_ALLOW,
 128         HELP_UNALLOW,
 129         HELP_USERSPACE,
 130         HELP_GROUPSPACE,
 131         HELP_HOLD,
 132         HELP_HOLDS,
 133         HELP_RELEASE,
 134         HELP_DIFF
 135 } zfs_help_t;
 136
 137 typedef struct zfs_command {
 138         const char      *name;
 139         int             (*func)(int argc, char **argv);
 140         zfs_help_t      usage;
 141 } zfs_command_t;
 142
 143 /*
 144  * Master command table.  Each ZFS command has a name, associated function, and
 145  * usage message.  The usage messages need to be internationalized, so we have
 146  * to have a function to return the usage message based on a command index.
 147  *
 148  * These commands are organized according to how they are displayed in the usage
 149  * message.  An empty command (one with a NULL name) indicates an empty line in
 150  * the generic usage message.
 151  */
 152 static zfs_command_t command_table[] = {
 153         { "create",     zfs_do_create,          HELP_CREATE             },
 154         { "destroy",    zfs_do_destroy,         HELP_DESTROY            },
 155         { NULL },
 156         { "snapshot",   zfs_do_snapshot,        HELP_SNAPSHOT           },
 157         { "rollback",   zfs_do_rollback,        HELP_ROLLBACK           },
 158         { "clone",      zfs_do_clone,           HELP_CLONE              },
 159         { "promote",    zfs_do_promote,         HELP_PROMOTE            },
 160         { "rename",     zfs_do_rename,          HELP_RENAME             },
 161         { NULL },
 162         { "list",       zfs_do_list,            HELP_LIST               },
 163         { NULL },
 164         { "set",        zfs_do_set,             HELP_SET                },
 165         { "get",        zfs_do_get,             HELP_GET                },
 166         { "inherit",    zfs_do_inherit,         HELP_INHERIT            },
 167         { "upgrade",    zfs_do_upgrade,         HELP_UPGRADE            },
 168         { "userspace",  zfs_do_userspace,       HELP_USERSPACE          },
 169         { "groupspace", zfs_do_userspace,       HELP_GROUPSPACE         },
 170         { NULL },
 171         { "mount",      zfs_do_mount,           HELP_MOUNT              },
 172         { "unmount",    zfs_do_unmount,         HELP_UNMOUNT            },
 173         { "share",      zfs_do_share,           HELP_SHARE              },
 174         { "unshare",    zfs_do_unshare,         HELP_UNSHARE            },
 175         { NULL },
 176         { "send",       zfs_do_send,            HELP_SEND               },
 177         { "receive",    zfs_do_receive,         HELP_RECEIVE            },
 178         { NULL },
 179         { "allow",      zfs_do_python,          HELP_ALLOW              },
 180         { NULL },
 181         { "unallow",    zfs_do_python,          HELP_UNALLOW            },
 182         { NULL },
 183         { "hold",       zfs_do_hold,            HELP_HOLD               },
 184         { "holds",      zfs_do_python,          HELP_HOLDS              },
 185         { "release",    zfs_do_release,         HELP_RELEASE            },
 186         { "diff",       zfs_do_diff,            HELP_DIFF               },
 187 };
 188
 189 #define NCOMMAND        (sizeof (command_table) / sizeof (command_table[0]))
 190
 191 zfs_command_t *current_command;
 192
 193 static const char *
 194 get_usage(zfs_help_t idx)
 195 {
 196         switch (idx) {
 197         case HELP_CLONE:
 198                 return (gettext("\tclone [-p] [-o property=value] ... "
 199                     "<snapshot> <filesystem|volume>\n"));
 200         case HELP_CREATE:
 201                 return (gettext("\tcreate [-p] [-o property=value] ... "
 202                     "<filesystem>\n"
 203                     "\tcreate [-ps] [-b blocksize] [-o property=value] ... "
 204                     "-V <size> <volume>\n"));
 205         case HELP_DESTROY:
 206                 return (gettext("\tdestroy [-rRf] <filesystem|volume>\n"
 207                     "\tdestroy [-rRd] <snapshot>\n"));
 208         case HELP_GET:
 209                 return (gettext("\tget [-rHp] [-d max] "
 210                     "[-o \"all\" | field[,...]] [-s source[,...]]\n"
 211                     "\t    <\"all\" | property[,...]> "
 212                     "[filesystem|volume|snapshot] ...\n"));
 213         case HELP_INHERIT:
 214                 return (gettext("\tinherit [-rS] <property> "
 215                     "<filesystem|volume|snapshot> ...\n"));
 216         case HELP_UPGRADE:
 217                 return (gettext("\tupgrade [-v]\n"
 218                     "\tupgrade [-r] [-V version] <-a | filesystem ...>\n"));
 219         case HELP_LIST:
 220                 return (gettext("\tlist [-rH][-d max] "
 221                     "[-o property[,...]] [-t type[,...]] [-s property] ...\n"
 222                     "\t    [-S property] ... "
 223                     "[filesystem|volume|snapshot] ...\n"));
 224         case HELP_MOUNT:
 225                 return (gettext("\tmount\n"
 226                     "\tmount [-vO] [-o opts] <-a | filesystem>\n"));
 227         case HELP_PROMOTE:
 228                 return (gettext("\tpromote <clone-filesystem>\n"));
 229         case HELP_RECEIVE:
 230                 return (gettext("\treceive [-vnFu] <filesystem|volume|"
 231                 "snapshot>\n"
 232                 "\treceive [-vnFu] [-d | -e] <filesystem>\n"));
 233         case HELP_RENAME:
 234                 return (gettext("\trename <filesystem|volume|snapshot> "
 235                     "<filesystem|volume|snapshot>\n"
 236                     "\trename -p <filesystem|volume> <filesystem|volume>\n"
 237                     "\trename -r <snapshot> <snapshot>"));
 238         case HELP_ROLLBACK:
 239                 return (gettext("\trollback [-rRf] <snapshot>\n"));
 240         case HELP_SEND:
 241                 return (gettext("\tsend [-RDp] [-[iI] snapshot] <snapshot>\n"));
 242         case HELP_SET:
 243                 return (gettext("\tset <property=value> "
 244                     "<filesystem|volume|snapshot> ...\n"));
 245         case HELP_SHARE:
 246                 return (gettext("\tshare <-a | filesystem>\n"));
 247         case HELP_SNAPSHOT:
 248                 return (gettext("\tsnapshot [-r] [-o property=value] ... "
 249                     "<filesystem@snapname|volume@snapname>\n"));
 250         case HELP_UNMOUNT:
 251                 return (gettext("\tunmount [-f] "
 252                     "<-a | filesystem|mountpoint>\n"));
 253         case HELP_UNSHARE:
 254                 return (gettext("\tunshare "
 255                     "<-a | filesystem|mountpoint>\n"));
 256         case HELP_ALLOW:
 257                 return (gettext("\tallow <filesystem|volume>\n"
 258                     "\tallow [-ldug] "
 259                     "<\"everyone\"|user|group>[,...] <perm|@setname>[,...]\n"
 260                     "\t    <filesystem|volume>\n"
 261                     "\tallow [-ld] -e <perm|@setname>[,...] "
 262                     "<filesystem|volume>\n"
 263                     "\tallow -c <perm|@setname>[,...] <filesystem|volume>\n"
 264                     "\tallow -s @setname <perm|@setname>[,...] "
 265                     "<filesystem|volume>\n"));
 266         case HELP_UNALLOW:
 267                 return (gettext("\tunallow [-rldug] "
 268                     "<\"everyone\"|user|group>[,...]\n"
 269                     "\t    [<perm|@setname>[,...]] <filesystem|volume>\n"
 270                     "\tunallow [-rld] -e [<perm|@setname>[,...]] "
 271                     "<filesystem|volume>\n"
 272                     "\tunallow [-r] -c [<perm|@setname>[,...]] "
 273                     "<filesystem|volume>\n"
 274                     "\tunallow [-r] -s @setname [<perm|@setname>[,...]] "
 275                     "<filesystem|volume>\n"));
 276         case HELP_USERSPACE:
 277                 return (gettext("\tuserspace [-hniHp] [-o field[,...]] "
 278                     "[-sS field] ... [-t type[,...]]\n"
 279                     "\t    <filesystem|snapshot>\n"));
 280         case HELP_GROUPSPACE:
 281                 return (gettext("\tgroupspace [-hniHpU] [-o field[,...]] "
 282                     "[-sS field] ... [-t type[,...]]\n"
 283                     "\t    <filesystem|snapshot>\n"));
 284         case HELP_HOLD:
 285                 return (gettext("\thold [-r] <tag> <snapshot> ...\n"));
 286         case HELP_HOLDS:
 287                 return (gettext("\tholds [-r] <snapshot> ...\n"));
 288         case HELP_RELEASE:
 289                 return (gettext("\trelease [-r] <tag> <snapshot> ...\n"));
 290         case HELP_DIFF:
 291                 return (gettext("\tdiff [-FHt] <snapshot> "
 292                     "[snapshot|filesystem]\n"));
 293         }
 294
 295         abort();
 296         /* NOTREACHED */
 297 }
 298
 299 void
 300 nomem(void)
 301 {
 302         (void) fprintf(stderr, gettext("internal error: out of memory\n"));
 303         exit(1);
 304 }
 305
 306 /*
 307  * Utility function to guarantee malloc() success.
 308  */
 309
 310 void *
 311 safe_malloc(size_t size)
 312 {
 313         void *data;
 314
 315         if ((data = calloc(1, size)) == NULL)
 316                 nomem();
 317
 318         return (data);
 319 }
 320
 321 #ifdef HAVE_ZPL
 322 static char *
 323 safe_strdup(char *str)
 324 {
 325         char *dupstr = strdup(str);
 326
 327         if (dupstr == NULL)
 328                 nomem();
 329
 330         return (dupstr);
 331 }
 332 #endif /* HAVE_ZPL */
 333
 334 /*
 335  * Callback routine that will print out information for each of
 336  * the properties.
 337  */
 338 static int
 339 usage_prop_cb(int prop, void *cb)
 340 {
 341         FILE *fp = cb;
 342
 343         (void) fprintf(fp, "\t%-15s ", zfs_prop_to_name(prop));
 344
 345         if (zfs_prop_readonly(prop))
 346                 (void) fprintf(fp, " NO    ");
 347         else
 348                 (void) fprintf(fp, "YES    ");
 349
 350         if (zfs_prop_inheritable(prop))
 351                 (void) fprintf(fp, "  YES   ");
 352         else
 353                 (void) fprintf(fp, "   NO   ");
 354
 355         if (zfs_prop_values(prop) == NULL)
 356                 (void) fprintf(fp, "-\n");
 357         else
 358                 (void) fprintf(fp, "%s\n", zfs_prop_values(prop));
 359
 360         return (ZPROP_CONT);
 361 }
 362
 363 /*
 364  * Display usage message.  If we're inside a command, display only the usage for
 365  * that command.  Otherwise, iterate over the entire command table and display
 366  * a complete usage message.
 367  */
 368 static void
 369 usage(boolean_t requested)
 370 {
 371         int i;
 372         boolean_t show_properties = B_FALSE;
 373         FILE *fp = requested ? stdout : stderr;
 374
 375         if (current_command == NULL) {
 376
 377                 (void) fprintf(fp, gettext("usage: zfs command args ...\n"));
 378                 (void) fprintf(fp,
 379                     gettext("where 'command' is one of the following:\n\n"));
 380
 381                 for (i = 0; i < NCOMMAND; i++) {
 382                         if (command_table[i].name == NULL)
 383                                 (void) fprintf(fp, "\n");
 384                         else
 385                                 (void) fprintf(fp, "%s",
 386                                     get_usage(command_table[i].usage));
 387                 }
 388
 389                 (void) fprintf(fp, gettext("\nEach dataset is of the form: "
 390                     "pool/[dataset/]*dataset[@name]\n"));
 391         } else {
 392                 (void) fprintf(fp, gettext("usage:\n"));
 393                 (void) fprintf(fp, "%s", get_usage(current_command->usage));
 394         }
 395
 396         if (current_command != NULL &&
 397             (strcmp(current_command->name, "set") == 0 ||
 398             strcmp(current_command->name, "get") == 0 ||
 399             strcmp(current_command->name, "inherit") == 0 ||
 400             strcmp(current_command->name, "list") == 0))
 401                 show_properties = B_TRUE;
 402
 403         if (show_properties) {
 404                 (void) fprintf(fp,
 405                     gettext("\nThe following properties are supported:\n"));
 406
 407                 (void) fprintf(fp, "\n\t%-14s %s  %s   %s\n\n",
 408                     "PROPERTY", "EDIT", "INHERIT", "VALUES");
 409
 410                 /* Iterate over all properties */
 411                 (void) zprop_iter(usage_prop_cb, fp, B_FALSE, B_TRUE,
 412                     ZFS_TYPE_DATASET);
 413
 414                 (void) fprintf(fp, "\t%-15s ", "userused@...");
 415                 (void) fprintf(fp, " NO       NO   <size>\n");
 416                 (void) fprintf(fp, "\t%-15s ", "groupused@...");
 417                 (void) fprintf(fp, " NO       NO   <size>\n");
 418                 (void) fprintf(fp, "\t%-15s ", "userquota@...");
 419                 (void) fprintf(fp, "YES       NO   <size> | none\n");
 420                 (void) fprintf(fp, "\t%-15s ", "groupquota@...");
 421                 (void) fprintf(fp, "YES       NO   <size> | none\n");
 422
 423                 (void) fprintf(fp, gettext("\nSizes are specified in bytes "
 424                     "with standard units such as K, M, G, etc.\n"));
 425                 (void) fprintf(fp, gettext("\nUser-defined properties can "
 426                     "be specified by using a name containing a colon (:).\n"));
 427                 (void) fprintf(fp, gettext("\nThe {user|group}{used|quota}@ "
 428                     "properties must be appended with\n"
 429                     "a user or group specifier of one of these forms:\n"
 430                     "    POSIX name      (eg: \"matt\")\n"
 431                     "    POSIX id        (eg: \"126829\")\n"
 432                     "    SMB name@domain (eg: \"matt@sun\")\n"
 433                     "    SMB SID         (eg: \"S-1-234-567-89\")\n"));
 434         } else {
 435                 (void) fprintf(fp,
 436                     gettext("\nFor the property list, run: %s\n"),
 437                     "zfs set|get");
 438                 (void) fprintf(fp,
 439                     gettext("\nFor the delegated permission list, run: %s\n"),
 440                     "zfs allow|unallow");
 441         }
 442
 443         /*
 444          * See comments at end of main().
 445          */
 446         if (getenv("ZFS_ABORT") != NULL) {
 447                 (void) printf("dumping core by request\n");
 448                 abort();
 449         }
 450
 451         exit(requested ? 0 : 2);
 452 }
 453
 454 static int
 455 parseprop(nvlist_t *props)
 456 {
 457         char *propname = optarg;
 458         char *propval, *strval;
 459
 460         if ((propval = strchr(propname, '=')) == NULL) {
 461                 (void) fprintf(stderr, gettext("missing "
 462                     "'=' for -o option\n"));
 463                 return (-1);
 464         }
 465         *propval = '\0';
 466         propval++;
 467         if (nvlist_lookup_string(props, propname, &strval) == 0) {
 468                 (void) fprintf(stderr, gettext("property '%s' "
 469                     "specified multiple times\n"), propname);
 470                 return (-1);
 471         }
 472         if (nvlist_add_string(props, propname, propval) != 0)
 473                 nomem();
 474         return (0);
 475 }
 476
 477 static int
 478 parse_depth(char *opt, int *flags)
 479 {
 480         char *tmp;
 481         int depth;
 482
 483         depth = (int)strtol(opt, &tmp, 0);
 484         if (*tmp) {
 485                 (void) fprintf(stderr,
 486                     gettext("%s is not an integer\n"), optarg);
 487                 usage(B_FALSE);
 488         }
 489         if (depth < 0) {
 490                 (void) fprintf(stderr,
 491                     gettext("Depth can not be negative.\n"));
 492                 usage(B_FALSE);
 493         }
 494         *flags |= (ZFS_ITER_DEPTH_LIMIT|ZFS_ITER_RECURSE);
 495         return (depth);
 496 }
 497
 498 #define PROGRESS_DELAY 2                /* seconds */
 499
 500 #ifdef HAVE_ZPL
 501 static char *pt_reverse = "\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b";
 502 static time_t pt_begin;
 503 static char *pt_header = NULL;
 504 static boolean_t pt_shown;
 505
 506 static void
 507 start_progress_timer(void)
 508 {
 509         pt_begin = time(NULL) + PROGRESS_DELAY;
 510         pt_shown = B_FALSE;
 511 }
 512
 513 static void
 514 set_progress_header(char *header)
 515 {
 516         assert(pt_header == NULL);
 517         pt_header = safe_strdup(header);
 518         if (pt_shown) {
 519                 (void) printf("%s: ", header);
 520                 (void) fflush(stdout);
 521         }
 522 }
 523
 524 static void
 525 update_progress(char *update)
 526 {
 527         if (!pt_shown && time(NULL) > pt_begin) {
 528                 int len = strlen(update);
 529
 530                 (void) printf("%s: %s%*.*s", pt_header, update, len, len,
 531                     pt_reverse);
 532                 (void) fflush(stdout);
 533                 pt_shown = B_TRUE;
 534         } else if (pt_shown) {
 535                 int len = strlen(update);
 536
 537                 (void) printf("%s%*.*s", update, len, len, pt_reverse);
 538                 (void) fflush(stdout);
 539         }
 540 }
 541
 542 static void
 543 finish_progress(char *done)
 544 {
 545         if (pt_shown) {
 546                 (void) printf("%s\n", done);
 547                 (void) fflush(stdout);
 548         }
 549         free(pt_header);
 550         pt_header = NULL;
 551 }
 552 #endif /* HAVE_ZPL */
 553
 554 /*
 555  * zfs clone [-p] [-o prop=value] ... <snap> <fs | vol>
 556  *
 557  * Given an existing dataset, create a writable copy whose initial contents
 558  * are the same as the source.  The newly created dataset maintains a
 559  * dependency on the original; the original cannot be destroyed so long as
 560  * the clone exists.
 561  *
 562  * The '-p' flag creates all the non-existing ancestors of the target first.
 563  */
 564 static int
 565 zfs_do_clone(int argc, char **argv)
 566 {
 567         zfs_handle_t *zhp = NULL;
 568         boolean_t parents = B_FALSE;
 569         nvlist_t *props;
 570         int ret;
 571         int c;
 572
 573         if (nvlist_alloc(&props, NV_UNIQUE_NAME, 0) != 0)
 574                 nomem();
 575
 576         /* check options */
 577         while ((c = getopt(argc, argv, "o:p")) != -1) {
 578                 switch (c) {
 579                 case 'o':
 580                         if (parseprop(props))
 581                                 return (1);
 582                         break;
 583                 case 'p':
 584                         parents = B_TRUE;
 585                         break;
 586                 case '?':
 587                         (void) fprintf(stderr, gettext("invalid option '%c'\n"),
 588                             optopt);
 589                         goto usage;
 590                 }
 591         }
 592
 593         argc -= optind;
 594         argv += optind;
 595
 596         /* check number of arguments */
 597         if (argc < 1) {
 598                 (void) fprintf(stderr, gettext("missing source dataset "
 599                     "argument\n"));
 600                 goto usage;
 601         }
 602         if (argc < 2) {
 603                 (void) fprintf(stderr, gettext("missing target dataset "
 604                     "argument\n"));
 605                 goto usage;
 606         }
 607         if (argc > 2) {
 608                 (void) fprintf(stderr, gettext("too many arguments\n"));
 609                 goto usage;
 610         }
 611
 612         /* open the source dataset */
 613         if ((zhp = zfs_open(g_zfs, argv[0], ZFS_TYPE_SNAPSHOT)) == NULL)
 614                 return (1);
 615
 616         if (parents && zfs_name_valid(argv[1], ZFS_TYPE_FILESYSTEM |
 617             ZFS_TYPE_VOLUME)) {
 618                 /*
 619                  * Now create the ancestors of the target dataset.  If the
 620                  * target already exists and '-p' option was used we should not
 621                  * complain.
 622                  */
 623                 if (zfs_dataset_exists(g_zfs, argv[1], ZFS_TYPE_FILESYSTEM |
 624                     ZFS_TYPE_VOLUME))
 625                         return (0);
 626                 if (zfs_create_ancestors(g_zfs, argv[1]) != 0)
 627                         return (1);
 628         }
 629
 630         /* pass to libzfs */
 631         ret = zfs_clone(zhp, argv[1], props);
 632
 633         /* create the mountpoint if necessary */
 634 #ifdef HAVE_ZPL
 635         if (ret == 0) {
 636                 zfs_handle_t *clone;
 637
 638                 clone = zfs_open(g_zfs, argv[1], ZFS_TYPE_DATASET);
 639                 if (clone != NULL) {
 640                         if (zfs_get_type(clone) != ZFS_TYPE_VOLUME)
 641                                 if ((ret = zfs_mount(clone, NULL, 0)) == 0)
 642                                         ret = zfs_share(clone);
 643                         zfs_close(clone);
 644                 }
 645         }
 646 #endif /* HAVE_ZPL */
 647
 648         zfs_close(zhp);
 649         nvlist_free(props);
 650
 651         return (!!ret);
 652
 653 usage:
 654         if (zhp)
 655                 zfs_close(zhp);
 656         nvlist_free(props);
 657         usage(B_FALSE);
 658         return (-1);
 659 }
 660
 661 /*
 662  * zfs create [-p] [-o prop=value] ... fs
 663  * zfs create [-ps] [-b blocksize] [-o prop=value] ... -V vol size
 664  *
 665  * Create a new dataset.  This command can be used to create filesystems
 666  * and volumes.  Snapshot creation is handled by 'zfs snapshot'.
 667  * For volumes, the user must specify a size to be used.
 668  *
 669  * The '-s' flag applies only to volumes, and indicates that we should not try
 670  * to set the reservation for this volume.  By default we set a reservation
 671  * equal to the size for any volume.  For pools with SPA_VERSION >=
 672  * SPA_VERSION_REFRESERVATION, we set a refreservation instead.
 673  *
 674  * The '-p' flag creates all the non-existing ancestors of the target first.
 675  */
 676 static int
 677 zfs_do_create(int argc, char **argv)
 678 {
 679         zfs_type_t type = ZFS_TYPE_FILESYSTEM;
 680         zfs_handle_t *zhp = NULL;
 681         uint64_t volsize = 0;
 682         int c;
 683         boolean_t noreserve = B_FALSE;
 684         boolean_t bflag = B_FALSE;
 685         boolean_t parents = B_FALSE;
 686         int ret = 1;
 687         nvlist_t *props;
 688         uint64_t intval;
 689         int canmount = ZFS_CANMOUNT_OFF;
 690
 691         if (nvlist_alloc(&props, NV_UNIQUE_NAME, 0) != 0)
 692                 nomem();
 693
 694         /* check options */
 695         while ((c = getopt(argc, argv, ":V:b:so:p")) != -1) {
 696                 switch (c) {
 697                 case 'V':
 698                         type = ZFS_TYPE_VOLUME;
 699                         if (zfs_nicestrtonum(g_zfs, optarg, &intval) != 0) {
 700                                 (void) fprintf(stderr, gettext("bad volume "
 701                                     "size '%s': %s\n"), optarg,
 702                                     libzfs_error_description(g_zfs));
 703                                 goto error;
 704                         }
 705
 706                         if (nvlist_add_uint64(props,
 707                             zfs_prop_to_name(ZFS_PROP_VOLSIZE), intval) != 0)
 708                                 nomem();
 709                         volsize = intval;
 710                         break;
 711                 case 'p':
 712                         parents = B_TRUE;
 713                         break;
 714                 case 'b':
 715                         bflag = B_TRUE;
 716                         if (zfs_nicestrtonum(g_zfs, optarg, &intval) != 0) {
 717                                 (void) fprintf(stderr, gettext("bad volume "
 718                                     "block size '%s': %s\n"), optarg,
 719                                     libzfs_error_description(g_zfs));
 720                                 goto error;
 721                         }
 722
 723                         if (nvlist_add_uint64(props,
 724                             zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE),
 725                             intval) != 0)
 726                                 nomem();
 727                         break;
 728                 case 'o':
 729                         if (parseprop(props))
 730                                 goto error;
 731                         break;
 732                 case 's':
 733                         noreserve = B_TRUE;
 734                         break;
 735                 case ':':
 736                         (void) fprintf(stderr, gettext("missing size "
 737                             "argument\n"));
 738                         goto badusage;
 739                         break;
 740                 case '?':
 741                         (void) fprintf(stderr, gettext("invalid option '%c'\n"),
 742                             optopt);
 743                         goto badusage;
 744                 }
 745         }
 746
 747         if ((bflag || noreserve) && type != ZFS_TYPE_VOLUME) {
 748                 (void) fprintf(stderr, gettext("'-s' and '-b' can only be "
 749                     "used when creating a volume\n"));
 750                 goto badusage;
 751         }
 752
 753         argc -= optind;
 754         argv += optind;
 755
 756         /* check number of arguments */
 757         if (argc == 0) {
 758                 (void) fprintf(stderr, gettext("missing %s argument\n"),
 759                     zfs_type_to_name(type));
 760                 goto badusage;
 761         }
 762         if (argc > 1) {
 763                 (void) fprintf(stderr, gettext("too many arguments\n"));
 764                 goto badusage;
 765         }
 766
 767         if (type == ZFS_TYPE_VOLUME && !noreserve) {
 768                 zpool_handle_t *zpool_handle;
 769                 uint64_t spa_version;
 770                 char *p;
 771                 zfs_prop_t resv_prop;
 772                 char *strval;
 773
 774                 if ((p = strchr(argv[0], '/')))
 775                         *p = '\0';
 776                 zpool_handle = zpool_open(g_zfs, argv[0]);
 777                 if (p != NULL)
 778                         *p = '/';
 779                 if (zpool_handle == NULL)
 780                         goto error;
 781                 spa_version = zpool_get_prop_int(zpool_handle,
 782                     ZPOOL_PROP_VERSION, NULL);
 783                 zpool_close(zpool_handle);
 784                 if (spa_version >= SPA_VERSION_REFRESERVATION)
 785                         resv_prop = ZFS_PROP_REFRESERVATION;
 786                 else
 787                         resv_prop = ZFS_PROP_RESERVATION;
 788                 volsize = zvol_volsize_to_reservation(volsize, props);
 789
 790                 if (nvlist_lookup_string(props, zfs_prop_to_name(resv_prop),
 791                     &strval) != 0) {
 792                         if (nvlist_add_uint64(props,
 793                             zfs_prop_to_name(resv_prop), volsize) != 0) {
 794                                 nvlist_free(props);
 795                                 nomem();
 796                         }
 797                 }
 798         }
 799
 800         if (parents && zfs_name_valid(argv[0], type)) {
 801                 /*
 802                  * Now create the ancestors of target dataset.  If the target
 803                  * already exists and '-p' option was used we should not
 804                  * complain.
 805                  */
 806                 if (zfs_dataset_exists(g_zfs, argv[0], type)) {
 807                         ret = 0;
 808                         goto error;
 809                 }
 810                 if (zfs_create_ancestors(g_zfs, argv[0]) != 0)
 811                         goto error;
 812         }
 813
 814         /* pass to libzfs */
 815         if (zfs_create(g_zfs, argv[0], type, props) != 0)
 816                 goto error;
 817
 818         if ((zhp = zfs_open(g_zfs, argv[0], ZFS_TYPE_DATASET)) == NULL)
 819                 goto error;
 820
 821         ret = 0;
 822         /*
 823          * if the user doesn't want the dataset automatically mounted,
 824          * then skip the mount/share step
 825          */
 826         if (zfs_prop_valid_for_type(ZFS_PROP_CANMOUNT, type))
 827                 canmount = zfs_prop_get_int(zhp, ZFS_PROP_CANMOUNT);
 828
 829         /*
 830          * Mount and/or share the new filesystem as appropriate.  We provide a
 831          * verbose error message to let the user know that their filesystem was
 832          * in fact created, even if we failed to mount or share it.
 833          */
 834 #ifdef HAVE_ZPL
 835         if (canmount == ZFS_CANMOUNT_ON) {
 836                 if (zfs_mount(zhp, NULL, 0) != 0) {
 837                         (void) fprintf(stderr, gettext("filesystem "
 838                             "successfully created, but not mounted\n"));
 839                         ret = 1;
 840                 } else if (zfs_share(zhp) != 0) {
 841                         (void) fprintf(stderr, gettext("filesystem "
 842                             "successfully created, but not shared\n"));
 843                         ret = 1;
 844                 }
 845         }
 846 #endif /* HAVE_ZPL */
 847
 848 error:
 849         if (zhp)
 850                 zfs_close(zhp);
 851         nvlist_free(props);
 852         return (ret);
 853 badusage:
 854         nvlist_free(props);
 855         usage(B_FALSE);
 856         return (2);
 857 }
 858
 859 /*
 860  * zfs destroy [-rRf] <fs, vol>
 861  * zfs destroy [-rRd] <snap>
 862  *
 863  *      -r      Recursively destroy all children
 864  *      -R      Recursively destroy all dependents, including clones
 865  *      -f      Force unmounting of any dependents
 866  *      -d      If we can't destroy now, mark for deferred destruction
 867  *
 868  * Destroys the given dataset.  By default, it will unmount any filesystems,
 869  * and refuse to destroy a dataset that has any dependents.  A dependent can
 870  * either be a child, or a clone of a child.
 871  */
 872 typedef struct destroy_cbdata {
 873         boolean_t       cb_first;
 874         int             cb_force;
 875         int             cb_recurse;
 876         int             cb_error;
 877         int             cb_needforce;
 878         int             cb_doclones;
 879         boolean_t       cb_closezhp;
 880         zfs_handle_t    *cb_target;
 881         char            *cb_snapname;
 882         boolean_t       cb_defer_destroy;
 883 } destroy_cbdata_t;
 884
 885 /*
 886  * Check for any dependents based on the '-r' or '-R' flags.
 887  */
 888 static int
 889 destroy_check_dependent(zfs_handle_t *zhp, void *data)
 890 {
 891         destroy_cbdata_t *cbp = data;
 892         const char *tname = zfs_get_name(cbp->cb_target);
 893         const char *name = zfs_get_name(zhp);
 894
 895         if (strncmp(tname, name, strlen(tname)) == 0 &&
 896             (name[strlen(tname)] == '/' || name[strlen(tname)] == '@')) {
 897                 /*
 898                  * This is a direct descendant, not a clone somewhere else in
 899                  * the hierarchy.
 900                  */
 901                 if (cbp->cb_recurse)
 902                         goto out;
 903
 904                 if (cbp->cb_first) {
 905                         (void) fprintf(stderr, gettext("cannot destroy '%s': "
 906                             "%s has children\n"),
 907                             zfs_get_name(cbp->cb_target),
 908                             zfs_type_to_name(zfs_get_type(cbp->cb_target)));
 909                         (void) fprintf(stderr, gettext("use '-r' to destroy "
 910                             "the following datasets:\n"));
 911                         cbp->cb_first = B_FALSE;
 912                         cbp->cb_error = 1;
 913                 }
 914
 915                 (void) fprintf(stderr, "%s\n", zfs_get_name(zhp));
 916         } else {
 917                 /*
 918                  * This is a clone.  We only want to report this if the '-r'
 919                  * wasn't specified, or the target is a snapshot.
 920                  */
 921                 if (!cbp->cb_recurse &&
 922                     zfs_get_type(cbp->cb_target) != ZFS_TYPE_SNAPSHOT)
 923                         goto out;
 924
 925                 if (cbp->cb_first) {
 926                         (void) fprintf(stderr, gettext("cannot destroy '%s': "
 927                             "%s has dependent clones\n"),
 928                             zfs_get_name(cbp->cb_target),
 929                             zfs_type_to_name(zfs_get_type(cbp->cb_target)));
 930                         (void) fprintf(stderr, gettext("use '-R' to destroy "
 931                             "the following datasets:\n"));
 932                         cbp->cb_first = B_FALSE;
 933                         cbp->cb_error = 1;
 934                 }
 935
 936                 (void) fprintf(stderr, "%s\n", zfs_get_name(zhp));
 937         }
 938
 939 out:
 940         zfs_close(zhp);
 941         return (0);
 942 }
 943
 944 static int
 945 destroy_callback(zfs_handle_t *zhp, void *data)
 946 {
 947         destroy_cbdata_t *cbp = data;
 948
 949         /*
 950          * Ignore pools (which we've already flagged as an error before getting
 951          * here).
 952          */
 953         if (strchr(zfs_get_name(zhp), '/') == NULL &&
 954             zfs_get_type(zhp) == ZFS_TYPE_FILESYSTEM) {
 955                 zfs_close(zhp);
 956                 return (0);
 957         }
 958
 959         /*
 960          * Bail out on the first error.
 961          */
 962         if (zfs_unmount(zhp, NULL, cbp->cb_force ? MS_FORCE : 0) != 0 ||
 963             zfs_destroy(zhp, cbp->cb_defer_destroy) != 0) {
 964                 zfs_close(zhp);
 965                 return (-1);
 966         }
 967
 968         zfs_close(zhp);
 969         return (0);
 970 }
 971
 972 static int
 973 destroy_snap_clones(zfs_handle_t *zhp, void *arg)
 974 {
 975         destroy_cbdata_t *cbp = arg;
 976         char thissnap[MAXPATHLEN];
 977         zfs_handle_t *szhp;
 978         boolean_t closezhp = cbp->cb_closezhp;
 979         int rv;
 980
 981         (void) snprintf(thissnap, sizeof (thissnap),
 982             "%s@%s", zfs_get_name(zhp), cbp->cb_snapname);
 983
 984         libzfs_print_on_error(g_zfs, B_FALSE);
 985         szhp = zfs_open(g_zfs, thissnap, ZFS_TYPE_SNAPSHOT);
 986         libzfs_print_on_error(g_zfs, B_TRUE);
 987         if (szhp) {
 988                 /*
 989                  * Destroy any clones of this snapshot
 990                  */
 991                 if (zfs_iter_dependents(szhp, B_FALSE, destroy_callback,
 992                     cbp) != 0) {
 993                         zfs_close(szhp);
 994                         if (closezhp)
 995                                 zfs_close(zhp);
 996                         return (-1);
 997                 }
 998                 zfs_close(szhp);
 999         }
1000
1001         cbp->cb_closezhp = B_TRUE;
1002         rv = zfs_iter_filesystems(zhp, destroy_snap_clones, arg);
1003         if (closezhp)
1004                 zfs_close(zhp);
1005         return (rv);
1006 }
1007
1008 static int
1009 zfs_do_destroy(int argc, char **argv)
1010 {
1011         destroy_cbdata_t cb = { 0 };
1012         int c;
1013         zfs_handle_t *zhp;
1014         char *cp;
1015         zfs_type_t type = ZFS_TYPE_DATASET;
1016
1017         /* check options */
1018         while ((c = getopt(argc, argv, "dfrR")) != -1) {
1019                 switch (c) {
1020                 case 'd':
1021                         cb.cb_defer_destroy = B_TRUE;
1022                         type = ZFS_TYPE_SNAPSHOT;
1023                         break;
1024                 case 'f':
1025                         cb.cb_force = 1;
1026                         break;
1027                 case 'r':
1028                         cb.cb_recurse = 1;
1029                         break;
1030                 case 'R':
1031                         cb.cb_recurse = 1;
1032                         cb.cb_doclones = 1;
1033                         break;
1034                 case '?':
1035                 default:
1036                         (void) fprintf(stderr, gettext("invalid option '%c'\n"),
1037                             optopt);
1038                         usage(B_FALSE);
1039                 }
1040         }
1041
1042         argc -= optind;
1043         argv += optind;
1044
1045         /* check number of arguments */
1046         if (argc == 0) {
1047                 (void) fprintf(stderr, gettext("missing path argument\n"));
1048                 usage(B_FALSE);
1049         }
1050         if (argc > 1) {
1051                 (void) fprintf(stderr, gettext("too many arguments\n"));
1052                 usage(B_FALSE);
1053         }
1054
1055         /*
1056          * If we are doing recursive destroy of a snapshot, then the
1057          * named snapshot may not exist.  Go straight to libzfs.
1058          */
1059         if (cb.cb_recurse && (cp = strchr(argv[0], '@'))) {
1060                 int ret;
1061
1062                 *cp = '\0';
1063                 if ((zhp = zfs_open(g_zfs, argv[0], ZFS_TYPE_DATASET)) == NULL)
1064                         return (1);
1065                 *cp = '@';
1066                 cp++;
1067
1068                 if (cb.cb_doclones) {
1069                         boolean_t defer = cb.cb_defer_destroy;
1070
1071                         /*
1072                          * Temporarily ignore the defer_destroy setting since
1073                          * it's not supported for clones.
1074                          */
1075                         cb.cb_defer_destroy = B_FALSE;
1076                         cb.cb_snapname = cp;
1077                         if (destroy_snap_clones(zhp, &cb) != 0) {
1078                                 zfs_close(zhp);
1079                                 return (1);
1080                         }
1081                         cb.cb_defer_destroy = defer;
1082                 }
1083
1084                 ret = zfs_destroy_snaps(zhp, cp, cb.cb_defer_destroy);
1085                 zfs_close(zhp);
1086                 if (ret) {
1087                         (void) fprintf(stderr,
1088                             gettext("no snapshots destroyed\n"));
1089                 }
1090                 return (ret != 0);
1091         }
1092
1093         /* Open the given dataset */
1094         if ((zhp = zfs_open(g_zfs, argv[0], type)) == NULL)
1095                 return (1);
1096
1097         cb.cb_target = zhp;
1098
1099         /*
1100          * Perform an explicit check for pools before going any further.
1101          */
1102         if (!cb.cb_recurse && strchr(zfs_get_name(zhp), '/') == NULL &&
1103             zfs_get_type(zhp) == ZFS_TYPE_FILESYSTEM) {
1104                 (void) fprintf(stderr, gettext("cannot destroy '%s': "
1105                     "operation does not apply to pools\n"),
1106                     zfs_get_name(zhp));
1107                 (void) fprintf(stderr, gettext("use 'zfs destroy -r "
1108                     "%s' to destroy all datasets in the pool\n"),
1109                     zfs_get_name(zhp));
1110                 (void) fprintf(stderr, gettext("use 'zpool destroy %s' "
1111                     "to destroy the pool itself\n"), zfs_get_name(zhp));
1112                 zfs_close(zhp);
1113                 return (1);
1114         }
1115
1116         /*
1117          * Check for any dependents and/or clones.
1118          */
1119         cb.cb_first = B_TRUE;
1120         if (!cb.cb_doclones && !cb.cb_defer_destroy &&
1121             zfs_iter_dependents(zhp, B_TRUE, destroy_check_dependent,
1122             &cb) != 0) {
1123                 zfs_close(zhp);
1124                 return (1);
1125         }
1126
1127         if (cb.cb_error || (!cb.cb_defer_destroy &&
1128             (zfs_iter_dependents(zhp, B_FALSE, destroy_callback, &cb) != 0))) {
1129                 zfs_close(zhp);
1130                 return (1);
1131         }
1132
1133         /*
1134          * Do the real thing.  The callback will close the handle regardless of
1135          * whether it succeeds or not.
1136          */
1137
1138         if (destroy_callback(zhp, &cb) != 0)
1139                 return (1);
1140
1141         return (0);
1142 }
1143
1144 static boolean_t
1145 is_recvd_column(zprop_get_cbdata_t *cbp)
1146 {
1147         int i;
1148         zfs_get_column_t col;
1149
1150         for (i = 0; i < ZFS_GET_NCOLS &&
1151             (col = cbp->cb_columns[i]) != GET_COL_NONE; i++)
1152                 if (col == GET_COL_RECVD)
1153                         return (B_TRUE);
1154         return (B_FALSE);
1155 }
1156
1157 /*
1158  * zfs get [-rHp] [-o all | field[,field]...] [-s source[,source]...]
1159  *      < all | property[,property]... > < fs | snap | vol > ...
1160  *
1161  *      -r      recurse over any child datasets
1162  *      -H      scripted mode.  Headers are stripped, and fields are separated
1163  *              by tabs instead of spaces.
1164  *      -o      Set of fields to display.  One of "name,property,value,
1165  *              received,source". Default is "name,property,value,source".
1166  *              "all" is an alias for all five.
1167  *      -s      Set of sources to allow.  One of
1168  *              "local,default,inherited,received,temporary,none".  Default is
1169  *              all six.
1170  *      -p      Display values in parsable (literal) format.
1171  *
1172  *  Prints properties for the given datasets.  The user can control which
1173  *  columns to display as well as which property types to allow.
1174  */
1175
1176 /*
1177  * Invoked to display the properties for a single dataset.
1178  */
1179 static int
1180 get_callback(zfs_handle_t *zhp, void *data)
1181 {
1182         char buf[ZFS_MAXPROPLEN];
1183         char rbuf[ZFS_MAXPROPLEN];
1184         zprop_source_t sourcetype;
1185         char source[ZFS_MAXNAMELEN];
1186         zprop_get_cbdata_t *cbp = data;
1187         nvlist_t *user_props = zfs_get_user_props(zhp);
1188         zprop_list_t *pl = cbp->cb_proplist;
1189         nvlist_t *propval;
1190         char *strval;
1191         char *sourceval;
1192         boolean_t received = is_recvd_column(cbp);
1193
1194         for (; pl != NULL; pl = pl->pl_next) {
1195                 char *recvdval = NULL;
1196                 /*
1197                  * Skip the special fake placeholder.  This will also skip over
1198                  * the name property when 'all' is specified.
1199                  */
1200                 if (pl->pl_prop == ZFS_PROP_NAME &&
1201                     pl == cbp->cb_proplist)
1202                         continue;
1203
1204                 if (pl->pl_prop != ZPROP_INVAL) {
1205                         if (zfs_prop_get(zhp, pl->pl_prop, buf,
1206                             sizeof (buf), &sourcetype, source,
1207                             sizeof (source),
1208                             cbp->cb_literal) != 0) {
1209                                 if (pl->pl_all)
1210                                         continue;
1211                                 if (!zfs_prop_valid_for_type(pl->pl_prop,
1212                                     ZFS_TYPE_DATASET)) {
1213                                         (void) fprintf(stderr,
1214                                             gettext("No such property '%s'\n"),
1215                                             zfs_prop_to_name(pl->pl_prop));
1216                                         continue;
1217                                 }
1218                                 sourcetype = ZPROP_SRC_NONE;
1219                                 (void) strlcpy(buf, "-", sizeof (buf));
1220                         }
1221
1222                         if (received && (zfs_prop_get_recvd(zhp,
1223                             zfs_prop_to_name(pl->pl_prop), rbuf, sizeof (rbuf),
1224                             cbp->cb_literal) == 0))
1225                                 recvdval = rbuf;
1226
1227                         zprop_print_one_property(zfs_get_name(zhp), cbp,
1228                             zfs_prop_to_name(pl->pl_prop),
1229                             buf, sourcetype, source, recvdval);
1230                 } else if (zfs_prop_userquota(pl->pl_user_prop)) {
1231                         sourcetype = ZPROP_SRC_LOCAL;
1232
1233                         if (zfs_prop_get_userquota(zhp, pl->pl_user_prop,
1234                             buf, sizeof (buf), cbp->cb_literal) != 0) {
1235                                 sourcetype = ZPROP_SRC_NONE;
1236                                 (void) strlcpy(buf, "-", sizeof (buf));
1237                         }
1238
1239                         zprop_print_one_property(zfs_get_name(zhp), cbp,
1240                             pl->pl_user_prop, buf, sourcetype, source, NULL);
1241                 } else {
1242                         if (nvlist_lookup_nvlist(user_props,
1243                             pl->pl_user_prop, &propval) != 0) {
1244                                 if (pl->pl_all)
1245                                         continue;
1246                                 sourcetype = ZPROP_SRC_NONE;
1247                                 strval = "-";
1248                         } else {
1249                                 verify(nvlist_lookup_string(propval,
1250                                     ZPROP_VALUE, &strval) == 0);
1251                                 verify(nvlist_lookup_string(propval,
1252                                     ZPROP_SOURCE, &sourceval) == 0);
1253
1254                                 if (strcmp(sourceval,
1255                                     zfs_get_name(zhp)) == 0) {
1256                                         sourcetype = ZPROP_SRC_LOCAL;
1257                                 } else if (strcmp(sourceval,
1258                                     ZPROP_SOURCE_VAL_RECVD) == 0) {
1259                                         sourcetype = ZPROP_SRC_RECEIVED;
1260                                 } else {
1261                                         sourcetype = ZPROP_SRC_INHERITED;
1262                                         (void) strlcpy(source,
1263                                             sourceval, sizeof (source));
1264                                 }
1265                         }
1266
1267                         if (received && (zfs_prop_get_recvd(zhp,
1268                             pl->pl_user_prop, rbuf, sizeof (rbuf),
1269                             cbp->cb_literal) == 0))
1270                                 recvdval = rbuf;
1271
1272                         zprop_print_one_property(zfs_get_name(zhp), cbp,
1273                             pl->pl_user_prop, strval, sourcetype,
1274                             source, recvdval);
1275                 }
1276         }
1277
1278         return (0);
1279 }
1280
1281 static int
1282 zfs_do_get(int argc, char **argv)
1283 {
1284         zprop_get_cbdata_t cb = { 0 };
1285         int i, c, flags = 0;
1286         char *value, *fields;
1287         int ret;
1288         int limit = 0;
1289         zprop_list_t fake_name = { 0 };
1290
1291         /*
1292          * Set up default columns and sources.
1293          */
1294         cb.cb_sources = ZPROP_SRC_ALL;
1295         cb.cb_columns[0] = GET_COL_NAME;
1296         cb.cb_columns[1] = GET_COL_PROPERTY;
1297         cb.cb_columns[2] = GET_COL_VALUE;
1298         cb.cb_columns[3] = GET_COL_SOURCE;
1299         cb.cb_type = ZFS_TYPE_DATASET;
1300
1301         /* check options */
1302         while ((c = getopt(argc, argv, ":d:o:s:rHp")) != -1) {
1303                 switch (c) {
1304                 case 'p':
1305                         cb.cb_literal = B_TRUE;
1306                         break;
1307                 case 'd':
1308                         limit = parse_depth(optarg, &flags);
1309                         break;
1310                 case 'r':
1311                         flags |= ZFS_ITER_RECURSE;
1312                         break;
1313                 case 'H':
1314                         cb.cb_scripted = B_TRUE;
1315                         break;
1316                 case ':':
1317                         (void) fprintf(stderr, gettext("missing argument for "
1318                             "'%c' option\n"), optopt);
1319                         usage(B_FALSE);
1320                         break;
1321                 case 'o':
1322                         /*
1323                          * Process the set of columns to display.  We zero out
1324                          * the structure to give us a blank slate.
1325                          */
1326                         bzero(&cb.cb_columns, sizeof (cb.cb_columns));
1327                         i = 0;
1328                         while (*optarg != '\0') {
1329                                 static char *col_subopts[] =
1330                                     { "name", "property", "value", "received",
1331                                     "source", "all", NULL };
1332
1333                                 if (i == ZFS_GET_NCOLS) {
1334                                         (void) fprintf(stderr, gettext("too "
1335                                             "many fields given to -o "
1336                                             "option\n"));
1337                                         usage(B_FALSE);
1338                                 }
1339
1340                                 switch (getsubopt(&optarg, col_subopts,
1341                                     &value)) {
1342                                 case 0:
1343                                         cb.cb_columns[i++] = GET_COL_NAME;
1344                                         break;
1345                                 case 1:
1346                                         cb.cb_columns[i++] = GET_COL_PROPERTY;
1347                                         break;
1348                                 case 2:
1349                                         cb.cb_columns[i++] = GET_COL_VALUE;
1350                                         break;
1351                                 case 3:
1352                                         cb.cb_columns[i++] = GET_COL_RECVD;
1353                                         flags |= ZFS_ITER_RECVD_PROPS;
1354                                         break;
1355                                 case 4:
1356                                         cb.cb_columns[i++] = GET_COL_SOURCE;
1357                                         break;
1358                                 case 5:
1359                                         if (i > 0) {
1360                                                 (void) fprintf(stderr,
1361                                                     gettext("\"all\" conflicts "
1362                                                     "with specific fields "
1363                                                     "given to -o option\n"));
1364                                                 usage(B_FALSE);
1365                                         }
1366                                         cb.cb_columns[0] = GET_COL_NAME;
1367                                         cb.cb_columns[1] = GET_COL_PROPERTY;
1368                                         cb.cb_columns[2] = GET_COL_VALUE;
1369                                         cb.cb_columns[3] = GET_COL_RECVD;
1370                                         cb.cb_columns[4] = GET_COL_SOURCE;
1371                                         flags |= ZFS_ITER_RECVD_PROPS;
1372                                         i = ZFS_GET_NCOLS;
1373                                         break;
1374                                 default:
1375                                         (void) fprintf(stderr,
1376                                             gettext("invalid column name "
1377                                             "'%s'\n"), value);
1378                                         usage(B_FALSE);
1379                                 }
1380                         }
1381                         break;
1382
1383                 case 's':
1384                         cb.cb_sources = 0;
1385                         while (*optarg != '\0') {
1386                                 static char *source_subopts[] = {
1387                                         "local", "default", "inherited",
1388                                         "received", "temporary", "none",
1389                                         NULL };
1390
1391                                 switch (getsubopt(&optarg, source_subopts,
1392                                     &value)) {
1393                                 case 0:
1394                                         cb.cb_sources |= ZPROP_SRC_LOCAL;
1395                                         break;
1396                                 case 1:
1397                                         cb.cb_sources |= ZPROP_SRC_DEFAULT;
1398                                         break;
1399                                 case 2:
1400                                         cb.cb_sources |= ZPROP_SRC_INHERITED;
1401                                         break;
1402                                 case 3:
1403                                         cb.cb_sources |= ZPROP_SRC_RECEIVED;
1404                                         break;
1405                                 case 4:
1406                                         cb.cb_sources |= ZPROP_SRC_TEMPORARY;
1407                                         break;
1408                                 case 5:
1409                                         cb.cb_sources |= ZPROP_SRC_NONE;
1410                                         break;
1411                                 default:
1412                                         (void) fprintf(stderr,
1413                                             gettext("invalid source "
1414                                             "'%s'\n"), value);
1415                                         usage(B_FALSE);
1416                                 }
1417                         }
1418                         break;
1419
1420                 case '?':
1421                         (void) fprintf(stderr, gettext("invalid option '%c'\n"),
1422                             optopt);
1423                         usage(B_FALSE);
1424                 }
1425         }
1426
1427         argc -= optind;
1428         argv += optind;
1429
1430         if (argc < 1) {
1431                 (void) fprintf(stderr, gettext("missing property "
1432                     "argument\n"));
1433                 usage(B_FALSE);
1434         }
1435
1436         fields = argv[0];
1437
1438         if (zprop_get_list(g_zfs, fields, &cb.cb_proplist, ZFS_TYPE_DATASET)
1439             != 0)
1440                 usage(B_FALSE);
1441
1442         argc--;
1443         argv++;
1444
1445         /*
1446          * As part of zfs_expand_proplist(), we keep track of the maximum column
1447          * width for each property.  For the 'NAME' (and 'SOURCE') columns, we
1448          * need to know the maximum name length.  However, the user likely did
1449          * not specify 'name' as one of the properties to fetch, so we need to
1450          * make sure we always include at least this property for
1451          * print_get_headers() to work properly.
1452          */
1453         if (cb.cb_proplist != NULL) {
1454                 fake_name.pl_prop = ZFS_PROP_NAME;
1455                 fake_name.pl_width = strlen(gettext("NAME"));
1456                 fake_name.pl_next = cb.cb_proplist;
1457                 cb.cb_proplist = &fake_name;
1458         }
1459
1460         cb.cb_first = B_TRUE;
1461
1462         /* run for each object */
1463         ret = zfs_for_each(argc, argv, flags, ZFS_TYPE_DATASET, NULL,
1464             &cb.cb_proplist, limit, get_callback, &cb);
1465
1466         if (cb.cb_proplist == &fake_name)
1467                 zprop_free_list(fake_name.pl_next);
1468         else
1469                 zprop_free_list(cb.cb_proplist);
1470
1471         return (ret);
1472 }
1473
1474 /*
1475  * inherit [-rS] <property> <fs|vol> ...
1476  *
1477  *      -r      Recurse over all children
1478  *      -S      Revert to received value, if any
1479  *
1480  * For each dataset specified on the command line, inherit the given property
1481  * from its parent.  Inheriting a property at the pool level will cause it to
1482  * use the default value.  The '-r' flag will recurse over all children, and is
1483  * useful for setting a property on a hierarchy-wide basis, regardless of any
1484  * local modifications for each dataset.
1485  */
1486
1487 typedef struct inherit_cbdata {
1488         const char *cb_propname;
1489         boolean_t cb_received;
1490 } inherit_cbdata_t;
1491
1492 static int
1493 inherit_recurse_cb(zfs_handle_t *zhp, void *data)
1494 {
1495         inherit_cbdata_t *cb = data;
1496         zfs_prop_t prop = zfs_name_to_prop(cb->cb_propname);
1497
1498         /*
1499          * If we're doing it recursively, then ignore properties that
1500          * are not valid for this type of dataset.
1501          */
1502         if (prop != ZPROP_INVAL &&
1503             !zfs_prop_valid_for_type(prop, zfs_get_type(zhp)))
1504                 return (0);
1505
1506         return (zfs_prop_inherit(zhp, cb->cb_propname, cb->cb_received) != 0);
1507 }
1508
1509 static int
1510 inherit_cb(zfs_handle_t *zhp, void *data)
1511 {
1512         inherit_cbdata_t *cb = data;
1513
1514         return (zfs_prop_inherit(zhp, cb->cb_propname, cb->cb_received) != 0);
1515 }
1516
1517 static int
1518 zfs_do_inherit(int argc, char **argv)
1519 {
1520         int c;
1521         zfs_prop_t prop;
1522         inherit_cbdata_t cb = { 0 };
1523         char *propname;
1524         int ret;
1525         int flags = 0;
1526         boolean_t received = B_FALSE;
1527
1528         /* check options */
1529         while ((c = getopt(argc, argv, "rS")) != -1) {
1530                 switch (c) {
1531                 case 'r':
1532                         flags |= ZFS_ITER_RECURSE;
1533                         break;
1534                 case 'S':
1535                         received = B_TRUE;
1536                         break;
1537                 case '?':
1538                 default:
1539                         (void) fprintf(stderr, gettext("invalid option '%c'\n"),
1540                             optopt);
1541                         usage(B_FALSE);
1542                 }
1543         }
1544
1545         argc -= optind;
1546         argv += optind;
1547
1548         /* check number of arguments */
1549         if (argc < 1) {
1550                 (void) fprintf(stderr, gettext("missing property argument\n"));
1551                 usage(B_FALSE);
1552         }
1553         if (argc < 2) {
1554                 (void) fprintf(stderr, gettext("missing dataset argument\n"));
1555                 usage(B_FALSE);
1556         }
1557
1558         propname = argv[0];
1559         argc--;
1560         argv++;
1561
1562         if ((prop = zfs_name_to_prop(propname)) != ZPROP_INVAL) {
1563                 if (zfs_prop_readonly(prop)) {
1564                         (void) fprintf(stderr, gettext(
1565                             "%s property is read-only\n"),
1566                             propname);
1567                         return (1);
1568                 }
1569                 if (!zfs_prop_inheritable(prop) && !received) {
1570                         (void) fprintf(stderr, gettext("'%s' property cannot "
1571                             "be inherited\n"), propname);
1572                         if (prop == ZFS_PROP_QUOTA ||
1573                             prop == ZFS_PROP_RESERVATION ||
1574                             prop == ZFS_PROP_REFQUOTA ||
1575                             prop == ZFS_PROP_REFRESERVATION)
1576                                 (void) fprintf(stderr, gettext("use 'zfs set "
1577                                     "%s=none' to clear\n"), propname);
1578                         return (1);
1579                 }
1580                 if (received && (prop == ZFS_PROP_VOLSIZE ||
1581                     prop == ZFS_PROP_VERSION)) {
1582                         (void) fprintf(stderr, gettext("'%s' property cannot "
1583                             "be reverted to a received value\n"), propname);
1584                         return (1);
1585                 }
1586         } else if (!zfs_prop_user(propname)) {
1587                 (void) fprintf(stderr, gettext("invalid property '%s'\n"),
1588                     propname);
1589                 usage(B_FALSE);
1590         }
1591
1592         cb.cb_propname = propname;
1593         cb.cb_received = received;
1594
1595         if (flags & ZFS_ITER_RECURSE) {
1596                 ret = zfs_for_each(argc, argv, flags, ZFS_TYPE_DATASET,
1597                     NULL, NULL, 0, inherit_recurse_cb, &cb);
1598         } else {
1599                 ret = zfs_for_each(argc, argv, flags, ZFS_TYPE_DATASET,
1600                     NULL, NULL, 0, inherit_cb, &cb);
1601         }
1602
1603         return (ret);
1604 }
1605
1606 typedef struct upgrade_cbdata {
1607         uint64_t cb_numupgraded;
1608         uint64_t cb_numsamegraded;
1609         uint64_t cb_numfailed;
1610         uint64_t cb_version;
1611         boolean_t cb_newer;
1612         boolean_t cb_foundone;
1613         char cb_lastfs[ZFS_MAXNAMELEN];
1614 } upgrade_cbdata_t;
1615
1616 static int
1617 same_pool(zfs_handle_t *zhp, const char *name)
1618 {
1619         int len1 = strcspn(name, "/@");
1620         const char *zhname = zfs_get_name(zhp);
1621         int len2 = strcspn(zhname, "/@");
1622
1623         if (len1 != len2)
1624                 return (B_FALSE);
1625         return (strncmp(name, zhname, len1) == 0);
1626 }
1627
1628 static int
1629 upgrade_list_callback(zfs_handle_t *zhp, void *data)
1630 {
1631         upgrade_cbdata_t *cb = data;
1632         int version = zfs_prop_get_int(zhp, ZFS_PROP_VERSION);
1633
1634         /* list if it's old/new */
1635         if ((!cb->cb_newer && version < ZPL_VERSION) ||
1636             (cb->cb_newer && version > ZPL_VERSION)) {
1637                 char *str;
1638                 if (cb->cb_newer) {
1639                         str = gettext("The following filesystems are "
1640                             "formatted using a newer software version and\n"
1641                             "cannot be accessed on the current system.\n\n");
1642                 } else {
1643                         str = gettext("The following filesystems are "
1644                             "out of date, and can be upgraded.  After being\n"
1645                             "upgraded, these filesystems (and any 'zfs send' "
1646                             "streams generated from\n"
1647                             "subsequent snapshots) will no longer be "
1648                             "accessible by older software versions.\n\n");
1649                 }
1650
1651                 if (!cb->cb_foundone) {
1652                         (void) puts(str);
1653                         (void) printf(gettext("VER  FILESYSTEM\n"));
1654                         (void) printf(gettext("---  ------------\n"));
1655                         cb->cb_foundone = B_TRUE;
1656                 }
1657
1658                 (void) printf("%2u   %s\n", version, zfs_get_name(zhp));
1659         }
1660
1661         return (0);
1662 }
1663
1664 static int
1665 upgrade_set_callback(zfs_handle_t *zhp, void *data)
1666 {
1667         upgrade_cbdata_t *cb = data;
1668         int version = zfs_prop_get_int(zhp, ZFS_PROP_VERSION);
1669         int needed_spa_version;
1670         int spa_version;
1671
1672         if (zfs_spa_version(zhp, &spa_version) < 0)
1673                 return (-1);
1674
1675         needed_spa_version = zfs_spa_version_map(cb->cb_version);
1676
1677         if (needed_spa_version < 0)
1678                 return (-1);
1679
1680         if (spa_version < needed_spa_version) {
1681                 /* can't upgrade */
1682                 (void) printf(gettext("%s: can not be "
1683                     "upgraded; the pool version needs to first "
1684                     "be upgraded\nto version %d\n\n"),
1685                     zfs_get_name(zhp), needed_spa_version);
1686                 cb->cb_numfailed++;
1687                 return (0);
1688         }
1689
1690         /* upgrade */
1691         if (version < cb->cb_version) {
1692                 char verstr[16];
1693                 (void) snprintf(verstr, sizeof (verstr),
1694                     "%llu", (u_longlong_t)cb->cb_version);
1695                 if (cb->cb_lastfs[0] && !same_pool(zhp, cb->cb_lastfs)) {
1696                         /*
1697                          * If they did "zfs upgrade -a", then we could
1698                          * be doing ioctls to different pools.  We need
1699                          * to log this history once to each pool.
1700                          */
1701                         verify(zpool_stage_history(g_zfs, history_str) == 0);
1702                 }
1703                 if (zfs_prop_set(zhp, "version", verstr) == 0)
1704                         cb->cb_numupgraded++;
1705                 else
1706                         cb->cb_numfailed++;
1707                 (void) strcpy(cb->cb_lastfs, zfs_get_name(zhp));
1708         } else if (version > cb->cb_version) {
1709                 /* can't downgrade */
1710                 (void) printf(gettext("%s: can not be downgraded; "
1711                     "it is already at version %u\n"),
1712                     zfs_get_name(zhp), version);
1713                 cb->cb_numfailed++;
1714         } else {
1715                 cb->cb_numsamegraded++;
1716         }
1717         return (0);
1718 }
1719
1720 /*
1721  * zfs upgrade
1722  * zfs upgrade -v
1723  * zfs upgrade [-r] [-V <version>] <-a | filesystem>
1724  */
1725 static int
1726 zfs_do_upgrade(int argc, char **argv)
1727 {
1728         boolean_t all = B_FALSE;
1729         boolean_t showversions = B_FALSE;
1730         int ret;
1731         upgrade_cbdata_t cb = { 0 };
1732         signed char c;
1733         int flags = ZFS_ITER_ARGS_CAN_BE_PATHS;
1734
1735         /* check options */
1736         while ((c = getopt(argc, argv, "rvV:a")) != -1) {
1737                 switch (c) {
1738                 case 'r':
1739                         flags |= ZFS_ITER_RECURSE;
1740                         break;
1741                 case 'v':
1742                         showversions = B_TRUE;
1743                         break;
1744                 case 'V':
1745                         if (zfs_prop_string_to_index(ZFS_PROP_VERSION,
1746                             optarg, &cb.cb_version) != 0) {
1747                                 (void) fprintf(stderr,
1748                                     gettext("invalid version %s\n"), optarg);
1749                                 usage(B_FALSE);
1750                         }
1751                         break;
1752                 case 'a':
1753                         all = B_TRUE;
1754                         break;
1755                 case '?':
1756                 default:
1757                         (void) fprintf(stderr, gettext("invalid option '%c'\n"),
1758                             optopt);
1759                         usage(B_FALSE);
1760                 }
1761         }
1762
1763         argc -= optind;
1764         argv += optind;
1765
1766         if ((!all && !argc) && ((flags & ZFS_ITER_RECURSE) | cb.cb_version))
1767                 usage(B_FALSE);
1768         if (showversions && (flags & ZFS_ITER_RECURSE || all ||
1769             cb.cb_version || argc))
1770                 usage(B_FALSE);
1771         if ((all || argc) && (showversions))
1772                 usage(B_FALSE);
1773         if (all && argc)
1774                 usage(B_FALSE);
1775
1776         if (showversions) {
1777                 /* Show info on available versions. */
1778                 (void) printf(gettext("The following filesystem versions are "
1779                     "supported:\n\n"));
1780                 (void) printf(gettext("VER  DESCRIPTION\n"));
1781                 (void) printf("---  -----------------------------------------"
1782                     "---------------\n");
1783                 (void) printf(gettext(" 1   Initial ZFS filesystem version\n"));
1784                 (void) printf(gettext(" 2   Enhanced directory entries\n"));
1785                 (void) printf(gettext(" 3   Case insensitive and File system "
1786                     "unique identifier (FUID)\n"));
1787                 (void) printf(gettext(" 4   userquota, groupquota "
1788                     "properties\n"));
1789                 (void) printf(gettext(" 5   System attributes\n"));
1790                 (void) printf(gettext("\nFor more information on a particular "
1791                     "version, including supported releases,\n"));
1792                 (void) printf("see the ZFS Administration Guide.\n\n");
1793                 ret = 0;
1794         } else if (argc || all) {
1795                 /* Upgrade filesystems */
1796                 if (cb.cb_version == 0)
1797                         cb.cb_version = ZPL_VERSION;
1798                 ret = zfs_for_each(argc, argv, flags, ZFS_TYPE_FILESYSTEM,
1799                     NULL, NULL, 0, upgrade_set_callback, &cb);
1800                 (void) printf(gettext("%llu filesystems upgraded\n"),
1801                     (u_longlong_t)cb.cb_numupgraded);
1802                 if (cb.cb_numsamegraded) {
1803                         (void) printf(gettext("%llu filesystems already at "
1804                             "this version\n"),
1805                             (u_longlong_t)cb.cb_numsamegraded);
1806                 }
1807                 if (cb.cb_numfailed != 0)
1808                         ret = 1;
1809         } else {
1810                 /* List old-version filesytems */
1811                 boolean_t found;
1812                 (void) printf(gettext("This system is currently running "
1813                     "ZFS filesystem version %llu.\n\n"), ZPL_VERSION);
1814
1815                 flags |= ZFS_ITER_RECURSE;
1816                 ret = zfs_for_each(0, NULL, flags, ZFS_TYPE_FILESYSTEM,
1817                     NULL, NULL, 0, upgrade_list_callback, &cb);
1818
1819                 found = cb.cb_foundone;
1820                 cb.cb_foundone = B_FALSE;
1821                 cb.cb_newer = B_TRUE;
1822
1823                 ret = zfs_for_each(0, NULL, flags, ZFS_TYPE_FILESYSTEM,
1824                     NULL, NULL, 0, upgrade_list_callback, &cb);
1825
1826                 if (!cb.cb_foundone && !found) {
1827                         (void) printf(gettext("All filesystems are "
1828                             "formatted with the current version.\n"));
1829                 }
1830         }
1831
1832         return (ret);
1833 }
1834
1835 /*
1836  * zfs userspace
1837  */
1838 static int
1839 userspace_cb(void *arg, const char *domain, uid_t rid, uint64_t space)
1840 {
1841         zfs_userquota_prop_t *typep = arg;
1842         zfs_userquota_prop_t p = *typep;
1843         char *name = NULL;
1844         char *ug, *propname;
1845         char namebuf[32];
1846         char sizebuf[32];
1847
1848         if (domain == NULL || domain[0] == '\0') {
1849                 if (p == ZFS_PROP_GROUPUSED || p == ZFS_PROP_GROUPQUOTA) {
1850                         struct group *g = getgrgid(rid);
1851                         if (g)
1852                                 name = g->gr_name;
1853                 } else {
1854                         struct passwd *p = getpwuid(rid);
1855                         if (p)
1856                                 name = p->pw_name;
1857                 }
1858         }
1859
1860         if (p == ZFS_PROP_GROUPUSED || p == ZFS_PROP_GROUPQUOTA)
1861                 ug = "group";
1862         else
1863                 ug = "user";
1864
1865         if (p == ZFS_PROP_USERUSED || p == ZFS_PROP_GROUPUSED)
1866                 propname = "used";
1867         else
1868                 propname = "quota";
1869
1870         if (name == NULL) {
1871                 (void) snprintf(namebuf, sizeof (namebuf),
1872                     "%llu", (longlong_t)rid);
1873                 name = namebuf;
1874         }
1875         zfs_nicenum(space, sizebuf, sizeof (sizebuf));
1876
1877         (void) printf("%s %s %s%c%s %s\n", propname, ug, domain,
1878             domain[0] ? '-' : ' ', name, sizebuf);
1879
1880         return (0);
1881 }
1882
1883 static int
1884 zfs_do_userspace(int argc, char **argv)
1885 {
1886         zfs_handle_t *zhp;
1887         zfs_userquota_prop_t p;
1888         int error;
1889
1890         /*
1891          * Try the python version.  If the execv fails, we'll continue
1892          * and do a simplistic implementation.
1893          */
1894         (void) execv(pypath, argv-1);
1895
1896         (void) printf("internal error: %s not found\n"
1897             "falling back on built-in implementation, "
1898             "some features will not work\n", pypath);
1899
1900         if ((zhp = zfs_open(g_zfs, argv[argc-1], ZFS_TYPE_DATASET)) == NULL)
1901                 return (1);
1902
1903         (void) printf("PROP TYPE NAME VALUE\n");
1904
1905         for (p = 0; p < ZFS_NUM_USERQUOTA_PROPS; p++) {
1906                 error = zfs_userspace(zhp, p, userspace_cb, &p);
1907                 if (error)
1908                         break;
1909         }
1910         return (error);
1911 }
1912
1913 /*
1914  * list [-r][-d max] [-H] [-o property[,property]...] [-t type[,type]...]
1915  *      [-s property [-s property]...] [-S property [-S property]...]
1916  *      <dataset> ...
1917  *
1918  *      -r      Recurse over all children
1919  *      -d      Limit recursion by depth.
1920  *      -H      Scripted mode; elide headers and separate columns by tabs
1921  *      -o      Control which fields to display.
1922  *      -t      Control which object types to display.
1923  *      -s      Specify sort columns, descending order.
1924  *      -S      Specify sort columns, ascending order.
1925  *
1926  * When given no arguments, lists all filesystems in the system.
1927  * Otherwise, list the specified datasets, optionally recursing down them if
1928  * '-r' is specified.
1929  */
1930 typedef struct list_cbdata {
1931         boolean_t       cb_first;
1932         boolean_t       cb_scripted;
1933         zprop_list_t    *cb_proplist;
1934 } list_cbdata_t;
1935
1936 /*
1937  * Given a list of columns to display, output appropriate headers for each one.
1938  */
1939 static void
1940 print_header(zprop_list_t *pl)
1941 {
1942         char headerbuf[ZFS_MAXPROPLEN];
1943         const char *header;
1944         int i;
1945         boolean_t first = B_TRUE;
1946         boolean_t right_justify;
1947
1948         for (; pl != NULL; pl = pl->pl_next) {
1949                 if (!first) {
1950                         (void) printf("  ");
1951                 } else {
1952                         first = B_FALSE;
1953                 }
1954
1955                 right_justify = B_FALSE;
1956                 if (pl->pl_prop != ZPROP_INVAL) {
1957                         header = zfs_prop_column_name(pl->pl_prop);
1958                         right_justify = zfs_prop_align_right(pl->pl_prop);
1959                 } else {
1960                         for (i = 0; pl->pl_user_prop[i] != '\0'; i++)
1961                                 headerbuf[i] = toupper(pl->pl_user_prop[i]);
1962                         headerbuf[i] = '\0';
1963                         header = headerbuf;
1964                 }
1965
1966                 if (pl->pl_next == NULL && !right_justify)
1967                         (void) printf("%s", header);
1968                 else if (right_justify)
1969                         (void) printf("%*s", (int)pl->pl_width, header);
1970                 else
1971                         (void) printf("%-*s", (int)pl->pl_width, header);
1972         }
1973
1974         (void) printf("\n");
1975 }
1976
1977 /*
1978  * Given a dataset and a list of fields, print out all the properties according
1979  * to the described layout.
1980  */
1981 static void
1982 print_dataset(zfs_handle_t *zhp, zprop_list_t *pl, boolean_t scripted)
1983 {
1984         boolean_t first = B_TRUE;
1985         char property[ZFS_MAXPROPLEN];
1986         nvlist_t *userprops = zfs_get_user_props(zhp);
1987         nvlist_t *propval;
1988         char *propstr;
1989         boolean_t right_justify;
1990         int width;
1991
1992         for (; pl != NULL; pl = pl->pl_next) {
1993                 if (!first) {
1994                         if (scripted)
1995                                 (void) printf("\t");
1996                         else
1997                                 (void) printf("  ");
1998                 } else {
1999                         first = B_FALSE;
2000                 }
2001
2002                 if (pl->pl_prop != ZPROP_INVAL) {
2003                         if (zfs_prop_get(zhp, pl->pl_prop, property,
2004                             sizeof (property), NULL, NULL, 0, B_FALSE) != 0)
2005                                 propstr = "-";
2006                         else
2007                                 propstr = property;
2008
2009                         right_justify = zfs_prop_align_right(pl->pl_prop);
2010                 } else if (zfs_prop_userquota(pl->pl_user_prop)) {
2011                         if (zfs_prop_get_userquota(zhp, pl->pl_user_prop,
2012                             property, sizeof (property), B_FALSE) != 0)
2013                                 propstr = "-";
2014                         else
2015                                 propstr = property;
2016                         right_justify = B_TRUE;
2017                 } else {
2018                         if (nvlist_lookup_nvlist(userprops,
2019                             pl->pl_user_prop, &propval) != 0)
2020                                 propstr = "-";
2021                         else
2022                                 verify(nvlist_lookup_string(propval,
2023                                     ZPROP_VALUE, &propstr) == 0);
2024                         right_justify = B_FALSE;
2025                 }
2026
2027                 width = pl->pl_width;
2028
2029                 /*
2030                  * If this is being called in scripted mode, or if this is the
2031                  * last column and it is left-justified, don't include a width
2032                  * format specifier.
2033                  */
2034                 if (scripted || (pl->pl_next == NULL && !right_justify))
2035                         (void) printf("%s", propstr);
2036                 else if (right_justify)
2037                         (void) printf("%*s", width, propstr);
2038                 else
2039                         (void) printf("%-*s", width, propstr);
2040         }
2041
2042         (void) printf("\n");
2043 }
2044
2045 /*
2046  * Generic callback function to list a dataset or snapshot.
2047  */
2048 static int
2049 list_callback(zfs_handle_t *zhp, void *data)
2050 {
2051         list_cbdata_t *cbp = data;
2052
2053         if (cbp->cb_first) {
2054                 if (!cbp->cb_scripted)
2055                         print_header(cbp->cb_proplist);
2056                 cbp->cb_first = B_FALSE;
2057         }
2058
2059         print_dataset(zhp, cbp->cb_proplist, cbp->cb_scripted);
2060
2061         return (0);
2062 }
2063
2064 static int
2065 zfs_do_list(int argc, char **argv)
2066 {
2067         int c;
2068         boolean_t scripted = B_FALSE;
2069         static char default_fields[] =
2070             "name,used,available,referenced,mountpoint";
2071         int types = ZFS_TYPE_DATASET;
2072         boolean_t types_specified = B_FALSE;
2073         char *fields = NULL;
2074         list_cbdata_t cb = { 0 };
2075         char *value;
2076         int limit = 0;
2077         int ret;
2078         zfs_sort_column_t *sortcol = NULL;
2079         int flags = ZFS_ITER_PROP_LISTSNAPS | ZFS_ITER_ARGS_CAN_BE_PATHS;
2080
2081         /* check options */
2082         while ((c = getopt(argc, argv, ":d:o:rt:Hs:S:")) != -1) {
2083                 switch (c) {
2084                 case 'o':
2085                         fields = optarg;
2086                         break;
2087                 case 'd':
2088                         limit = parse_depth(optarg, &flags);
2089                         break;
2090                 case 'r':
2091                         flags |= ZFS_ITER_RECURSE;
2092                         break;
2093                 case 'H':
2094                         scripted = B_TRUE;
2095                         break;
2096                 case 's':
2097                         if (zfs_add_sort_column(&sortcol, optarg,
2098                             B_FALSE) != 0) {
2099                                 (void) fprintf(stderr,
2100                                     gettext("invalid property '%s'\n"), optarg);
2101                                 usage(B_FALSE);
2102                         }
2103                         break;
2104                 case 'S':
2105                         if (zfs_add_sort_column(&sortcol, optarg,
2106                             B_TRUE) != 0) {
2107                                 (void) fprintf(stderr,
2108                                     gettext("invalid property '%s'\n"), optarg);
2109                                 usage(B_FALSE);
2110                         }
2111                         break;
2112                 case 't':
2113                         types = 0;
2114                         types_specified = B_TRUE;
2115                         flags &= ~ZFS_ITER_PROP_LISTSNAPS;
2116                         while (*optarg != '\0') {
2117                                 static char *type_subopts[] = { "filesystem",
2118                                     "volume", "snapshot", "all", NULL };
2119
2120                                 switch (getsubopt(&optarg, type_subopts,
2121                                     &value)) {
2122                                 case 0:
2123                                         types |= ZFS_TYPE_FILESYSTEM;
2124                                         break;
2125                                 case 1:
2126                                         types |= ZFS_TYPE_VOLUME;
2127                                         break;
2128                                 case 2:
2129                                         types |= ZFS_TYPE_SNAPSHOT;
2130                                         break;
2131                                 case 3:
2132                                         types = ZFS_TYPE_DATASET;
2133                                         break;
2134
2135                                 default:
2136                                         (void) fprintf(stderr,
2137                                             gettext("invalid type '%s'\n"),
2138                                             value);
2139                                         usage(B_FALSE);
2140                                 }
2141                         }
2142                         break;
2143                 case ':':
2144                         (void) fprintf(stderr, gettext("missing argument for "
2145                             "'%c' option\n"), optopt);
2146                         usage(B_FALSE);
2147                         break;
2148                 case '?':
2149                         (void) fprintf(stderr, gettext("invalid option '%c'\n"),
2150                             optopt);
2151                         usage(B_FALSE);
2152                 }
2153         }
2154
2155         argc -= optind;
2156         argv += optind;
2157
2158         if (fields == NULL)
2159                 fields = default_fields;
2160
2161         /*
2162          * If "-o space" and no types were specified, don't display snapshots.
2163          */
2164         if (strcmp(fields, "space") == 0 && types_specified == B_FALSE)
2165                 types &= ~ZFS_TYPE_SNAPSHOT;
2166
2167         /*
2168          * If the user specifies '-o all', the zprop_get_list() doesn't
2169          * normally include the name of the dataset.  For 'zfs list', we always
2170          * want this property to be first.
2171          */
2172         if (zprop_get_list(g_zfs, fields, &cb.cb_proplist, ZFS_TYPE_DATASET)
2173             != 0)
2174                 usage(B_FALSE);
2175
2176         cb.cb_scripted = scripted;
2177         cb.cb_first = B_TRUE;
2178
2179         ret = zfs_for_each(argc, argv, flags, types, sortcol, &cb.cb_proplist,
2180             limit, list_callback, &cb);
2181
2182         zprop_free_list(cb.cb_proplist);
2183         zfs_free_sort_columns(sortcol);
2184
2185         if (ret == 0 && cb.cb_first && !cb.cb_scripted)
2186                 (void) printf(gettext("no datasets available\n"));
2187
2188         return (ret);
2189 }
2190
2191 /*
2192  * zfs rename <fs | snap | vol> <fs | snap | vol>
2193  * zfs rename -p <fs | vol> <fs | vol>
2194  * zfs rename -r <snap> <snap>
2195  *
2196  * Renames the given dataset to another of the same type.
2197  *
2198  * The '-p' flag creates all the non-existing ancestors of the target first.
2199  */
2200 /* ARGSUSED */
2201 static int
2202 zfs_do_rename(int argc, char **argv)
2203 {
2204         zfs_handle_t *zhp;
2205         int c;
2206         int ret;
2207         boolean_t recurse = B_FALSE;
2208         boolean_t parents = B_FALSE;
2209
2210         /* check options */
2211         while ((c = getopt(argc, argv, "pr")) != -1) {
2212                 switch (c) {
2213                 case 'p':
2214                         parents = B_TRUE;
2215                         break;
2216                 case 'r':
2217                         recurse = B_TRUE;
2218                         break;
2219                 case '?':
2220                 default:
2221                         (void) fprintf(stderr, gettext("invalid option '%c'\n"),
2222                             optopt);
2223                         usage(B_FALSE);
2224                 }
2225         }
2226
2227         argc -= optind;
2228         argv += optind;
2229
2230         /* check number of arguments */
2231         if (argc < 1) {
2232                 (void) fprintf(stderr, gettext("missing source dataset "
2233                     "argument\n"));
2234                 usage(B_FALSE);
2235         }
2236         if (argc < 2) {
2237                 (void) fprintf(stderr, gettext("missing target dataset "
2238                     "argument\n"));
2239                 usage(B_FALSE);
2240         }
2241         if (argc > 2) {
2242                 (void) fprintf(stderr, gettext("too many arguments\n"));
2243                 usage(B_FALSE);
2244         }
2245
2246         if (recurse && parents) {
2247                 (void) fprintf(stderr, gettext("-p and -r options are mutually "
2248                     "exclusive\n"));
2249                 usage(B_FALSE);
2250         }
2251
2252         if (recurse && strchr(argv[0], '@') == 0) {
2253                 (void) fprintf(stderr, gettext("source dataset for recursive "
2254                     "rename must be a snapshot\n"));
2255                 usage(B_FALSE);
2256         }
2257
2258         if ((zhp = zfs_open(g_zfs, argv[0], parents ? ZFS_TYPE_FILESYSTEM |
2259             ZFS_TYPE_VOLUME : ZFS_TYPE_DATASET)) == NULL)
2260                 return (1);
2261
2262         /* If we were asked and the name looks good, try to create ancestors. */
2263         if (parents && zfs_name_valid(argv[1], zfs_get_type(zhp)) &&
2264             zfs_create_ancestors(g_zfs, argv[1]) != 0) {
2265                 zfs_close(zhp);
2266                 return (1);
2267         }
2268
2269         ret = (zfs_rename(zhp, argv[1], recurse) != 0);
2270
2271         zfs_close(zhp);
2272         return (ret);
2273 }
2274
2275 /*
2276  * zfs promote <fs>
2277  *
2278  * Promotes the given clone fs to be the parent
2279  */
2280 /* ARGSUSED */
2281 static int
2282 zfs_do_promote(int argc, char **argv)
2283 {
2284         zfs_handle_t *zhp;
2285         int ret;
2286
2287         /* check options */
2288         if (argc > 1 && argv[1][0] == '-') {
2289                 (void) fprintf(stderr, gettext("invalid option '%c'\n"),
2290                     argv[1][1]);
2291                 usage(B_FALSE);
2292         }
2293
2294         /* check number of arguments */
2295         if (argc < 2) {
2296                 (void) fprintf(stderr, gettext("missing clone filesystem"
2297                     " argument\n"));
2298                 usage(B_FALSE);
2299         }
2300         if (argc > 2) {
2301                 (void) fprintf(stderr, gettext("too many arguments\n"));
2302                 usage(B_FALSE);
2303         }
2304
2305         zhp = zfs_open(g_zfs, argv[1], ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME);
2306         if (zhp == NULL)
2307                 return (1);
2308
2309         ret = (zfs_promote(zhp) != 0);
2310
2311
2312         zfs_close(zhp);
2313         return (ret);
2314 }
2315
2316 /*
2317  * zfs rollback [-rRf] <snapshot>
2318  *
2319  *      -r      Delete any intervening snapshots before doing rollback
2320  *      -R      Delete any snapshots and their clones
2321  *      -f      ignored for backwards compatability
2322  *
2323  * Given a filesystem, rollback to a specific snapshot, discarding any changes
2324  * since then and making it the active dataset.  If more recent snapshots exist,
2325  * the command will complain unless the '-r' flag is given.
2326  */
2327 typedef struct rollback_cbdata {
2328         uint64_t        cb_create;
2329         boolean_t       cb_first;
2330         int             cb_doclones;
2331         char            *cb_target;
2332         int             cb_error;
2333         boolean_t       cb_recurse;
2334         boolean_t       cb_dependent;
2335 } rollback_cbdata_t;
2336
2337 /*
2338  * Report any snapshots more recent than the one specified.  Used when '-r' is
2339  * not specified.  We reuse this same callback for the snapshot dependents - if
2340  * 'cb_dependent' is set, then this is a dependent and we should report it
2341  * without checking the transaction group.
2342  */
2343 static int
2344 rollback_check(zfs_handle_t *zhp, void *data)
2345 {
2346         rollback_cbdata_t *cbp = data;
2347
2348         if (cbp->cb_doclones) {
2349                 zfs_close(zhp);
2350                 return (0);
2351         }
2352
2353         if (!cbp->cb_dependent) {
2354                 if (strcmp(zfs_get_name(zhp), cbp->cb_target) != 0 &&
2355                     zfs_get_type(zhp) == ZFS_TYPE_SNAPSHOT &&
2356                     zfs_prop_get_int(zhp, ZFS_PROP_CREATETXG) >
2357                     cbp->cb_create) {
2358
2359                         if (cbp->cb_first && !cbp->cb_recurse) {
2360                                 (void) fprintf(stderr, gettext("cannot "
2361                                     "rollback to '%s': more recent snapshots "
2362                                     "exist\n"),
2363                                     cbp->cb_target);
2364                                 (void) fprintf(stderr, gettext("use '-r' to "
2365                                     "force deletion of the following "
2366                                     "snapshots:\n"));
2367                                 cbp->cb_first = 0;
2368                                 cbp->cb_error = 1;
2369                         }
2370
2371                         if (cbp->cb_recurse) {
2372                                 cbp->cb_dependent = B_TRUE;
2373                                 if (zfs_iter_dependents(zhp, B_TRUE,
2374                                     rollback_check, cbp) != 0) {
2375                                         zfs_close(zhp);
2376                                         return (-1);
2377                                 }
2378                                 cbp->cb_dependent = B_FALSE;
2379                         } else {
2380                                 (void) fprintf(stderr, "%s\n",
2381                                     zfs_get_name(zhp));
2382                         }
2383                 }
2384         } else {
2385                 if (cbp->cb_first && cbp->cb_recurse) {
2386                         (void) fprintf(stderr, gettext("cannot rollback to "
2387                             "'%s': clones of previous snapshots exist\n"),
2388                             cbp->cb_target);
2389                         (void) fprintf(stderr, gettext("use '-R' to "
2390                             "force deletion of the following clones and "
2391                             "dependents:\n"));
2392                         cbp->cb_first = 0;
2393                         cbp->cb_error = 1;
2394                 }
2395
2396                 (void) fprintf(stderr, "%s\n", zfs_get_name(zhp));
2397         }
2398
2399         zfs_close(zhp);
2400         return (0);
2401 }
2402
2403 static int
2404 zfs_do_rollback(int argc, char **argv)
2405 {
2406         int ret;
2407         int c;
2408         boolean_t force = B_FALSE;
2409         rollback_cbdata_t cb = { 0 };
2410         zfs_handle_t *zhp, *snap;
2411         char parentname[ZFS_MAXNAMELEN];
2412         char *delim;
2413
2414         /* check options */
2415         while ((c = getopt(argc, argv, "rRf")) != -1) {
2416                 switch (c) {
2417                 case 'r':
2418                         cb.cb_recurse = 1;
2419                         break;
2420                 case 'R':
2421                         cb.cb_recurse = 1;
2422                         cb.cb_doclones = 1;
2423                         break;
2424                 case 'f':
2425                         force = B_TRUE;
2426                         break;
2427                 case '?':
2428                         (void) fprintf(stderr, gettext("invalid option '%c'\n"),
2429                             optopt);
2430                         usage(B_FALSE);
2431                 }
2432         }
2433
2434         argc -= optind;
2435         argv += optind;
2436
2437         /* check number of arguments */
2438         if (argc < 1) {
2439                 (void) fprintf(stderr, gettext("missing dataset argument\n"));
2440                 usage(B_FALSE);
2441         }
2442         if (argc > 1) {
2443                 (void) fprintf(stderr, gettext("too many arguments\n"));
2444                 usage(B_FALSE);
2445         }
2446
2447         /* open the snapshot */
2448         if ((snap = zfs_open(g_zfs, argv[0], ZFS_TYPE_SNAPSHOT)) == NULL)
2449                 return (1);
2450
2451         /* open the parent dataset */
2452         (void) strlcpy(parentname, argv[0], sizeof (parentname));
2453         verify((delim = strrchr(parentname, '@')) != NULL);
2454         *delim = '\0';
2455         if ((zhp = zfs_open(g_zfs, parentname, ZFS_TYPE_DATASET)) == NULL) {
2456                 zfs_close(snap);
2457                 return (1);
2458         }
2459
2460         /*
2461          * Check for more recent snapshots and/or clones based on the presence
2462          * of '-r' and '-R'.
2463          */
2464         cb.cb_target = argv[0];
2465         cb.cb_create = zfs_prop_get_int(snap, ZFS_PROP_CREATETXG);
2466         cb.cb_first = B_TRUE;
2467         cb.cb_error = 0;
2468         if ((ret = zfs_iter_children(zhp, rollback_check, &cb)) != 0)
2469                 goto out;
2470
2471         if ((ret = cb.cb_error) != 0)
2472                 goto out;
2473
2474         /*
2475          * Rollback parent to the given snapshot.
2476          */
2477         ret = zfs_rollback(zhp, snap, force);
2478
2479 out:
2480         zfs_close(snap);
2481         zfs_close(zhp);
2482
2483         if (ret == 0)
2484                 return (0);
2485         else
2486                 return (1);
2487 }
2488
2489 /*
2490  * zfs set property=value { fs | snap | vol } ...
2491  *
2492  * Sets the given property for all datasets specified on the command line.
2493  */
2494 typedef struct set_cbdata {
2495         char            *cb_propname;
2496         char            *cb_value;
2497 } set_cbdata_t;
2498
2499 static int
2500 set_callback(zfs_handle_t *zhp, void *data)
2501 {
2502         set_cbdata_t *cbp = data;
2503
2504         if (zfs_prop_set(zhp, cbp->cb_propname, cbp->cb_value) != 0) {
2505                 switch (libzfs_errno(g_zfs)) {
2506                 case EZFS_MOUNTFAILED:
2507                         (void) fprintf(stderr, gettext("property may be set "
2508                             "but unable to remount filesystem\n"));
2509                         break;
2510                 case EZFS_SHARENFSFAILED:
2511                         (void) fprintf(stderr, gettext("property may be set "
2512                             "but unable to reshare filesystem\n"));
2513                         break;
2514                 }
2515                 return (1);
2516         }
2517         return (0);
2518 }
2519
2520 static int
2521 zfs_do_set(int argc, char **argv)
2522 {
2523         set_cbdata_t cb;
2524         int ret;
2525
2526         /* check for options */
2527         if (argc > 1 && argv[1][0] == '-') {
2528                 (void) fprintf(stderr, gettext("invalid option '%c'\n"),
2529                     argv[1][1]);
2530                 usage(B_FALSE);
2531         }
2532
2533         /* check number of arguments */
2534         if (argc < 2) {
2535                 (void) fprintf(stderr, gettext("missing property=value "
2536                     "argument\n"));
2537                 usage(B_FALSE);
2538         }
2539         if (argc < 3) {
2540                 (void) fprintf(stderr, gettext("missing dataset name\n"));
2541                 usage(B_FALSE);
2542         }
2543
2544         /* validate property=value argument */
2545         cb.cb_propname = argv[1];
2546         if (((cb.cb_value = strchr(cb.cb_propname, '=')) == NULL) ||
2547             (cb.cb_value[1] == '\0')) {
2548                 (void) fprintf(stderr, gettext("missing value in "
2549                     "property=value argument\n"));
2550                 usage(B_FALSE);
2551         }
2552
2553         *cb.cb_value = '\0';
2554         cb.cb_value++;
2555
2556         if (*cb.cb_propname == '\0') {
2557                 (void) fprintf(stderr,
2558                     gettext("missing property in property=value argument\n"));
2559                 usage(B_FALSE);
2560         }
2561
2562         ret = zfs_for_each(argc - 2, argv + 2, 0,
2563             ZFS_TYPE_DATASET, NULL, NULL, 0, set_callback, &cb);
2564
2565         return (ret);
2566 }
2567
2568 /*
2569  * zfs snapshot [-r] [-o prop=value] ... <fs@snap>
2570  *
2571  * Creates a snapshot with the given name.  While functionally equivalent to
2572  * 'zfs create', it is a separate command to differentiate intent.
2573  */
2574 static int
2575 zfs_do_snapshot(int argc, char **argv)
2576 {
2577         boolean_t recursive = B_FALSE;
2578         int ret;
2579         signed char c;
2580         nvlist_t *props;
2581
2582         if (nvlist_alloc(&props, NV_UNIQUE_NAME, 0) != 0)
2583                 nomem();
2584
2585         /* check options */
2586         while ((c = getopt(argc, argv, "ro:")) != -1) {
2587                 switch (c) {
2588                 case 'o':
2589                         if (parseprop(props))
2590                                 return (1);
2591                         break;
2592                 case 'r':
2593                         recursive = B_TRUE;
2594                         break;
2595                 case '?':
2596                         (void) fprintf(stderr, gettext("invalid option '%c'\n"),
2597                             optopt);
2598                         goto usage;
2599                 }
2600         }
2601
2602         argc -= optind;
2603         argv += optind;
2604
2605         /* check number of arguments */
2606         if (argc < 1) {
2607                 (void) fprintf(stderr, gettext("missing snapshot argument\n"));
2608                 goto usage;
2609         }
2610         if (argc > 1) {
2611                 (void) fprintf(stderr, gettext("too many arguments\n"));
2612                 goto usage;
2613         }
2614
2615         ret = zfs_snapshot(g_zfs, argv[0], recursive, props);
2616         nvlist_free(props);
2617         if (ret && recursive)
2618                 (void) fprintf(stderr, gettext("no snapshots were created\n"));
2619         return (ret != 0);
2620
2621 usage:
2622         nvlist_free(props);
2623         usage(B_FALSE);
2624         return (-1);
2625 }
2626
2627 /*
2628  * zfs send [-vDp] -R [-i|-I <@snap>] <fs@snap>
2629  * zfs send [-vDp] [-i|-I <@snap>] <fs@snap>
2630  *
2631  * Send a backup stream to stdout.
2632  */
2633 static int
2634 zfs_do_send(int argc, char **argv)
2635 {
2636         char *fromname = NULL;
2637         char *toname = NULL;
2638         char *cp;
2639         zfs_handle_t *zhp;
2640         sendflags_t flags = { 0 };
2641         int c, err;
2642         nvlist_t *dbgnv;
2643         boolean_t extraverbose = B_FALSE;
2644
2645         /* check options */
2646         while ((c = getopt(argc, argv, ":i:I:RDpv")) != -1) {
2647                 switch (c) {
2648                 case 'i':
2649                         if (fromname)
2650                                 usage(B_FALSE);
2651                         fromname = optarg;
2652                         break;
2653                 case 'I':
2654                         if (fromname)
2655                                 usage(B_FALSE);
2656                         fromname = optarg;
2657                         flags.doall = B_TRUE;
2658                         break;
2659                 case 'R':
2660                         flags.replicate = B_TRUE;
2661                         break;
2662                 case 'p':
2663                         flags.props = B_TRUE;
2664                         break;
2665                 case 'v':
2666                         if (flags.verbose)
2667                                 extraverbose = B_TRUE;
2668                         flags.verbose = B_TRUE;
2669                         break;
2670                 case 'D':
2671                         flags.dedup = B_TRUE;
2672                         break;
2673                 case ':':
2674                         (void) fprintf(stderr, gettext("missing argument for "
2675                             "'%c' option\n"), optopt);
2676                         usage(B_FALSE);
2677                         break;
2678                 case '?':
2679                         (void) fprintf(stderr, gettext("invalid option '%c'\n"),
2680                             optopt);
2681                         usage(B_FALSE);
2682                 }
2683         }
2684
2685         argc -= optind;
2686         argv += optind;
2687
2688         /* check number of arguments */
2689         if (argc < 1) {
2690                 (void) fprintf(stderr, gettext("missing snapshot argument\n"));
2691                 usage(B_FALSE);
2692         }
2693         if (argc > 1) {
2694                 (void) fprintf(stderr, gettext("too many arguments\n"));
2695                 usage(B_FALSE);
2696         }
2697
2698         if (isatty(STDOUT_FILENO)) {
2699                 (void) fprintf(stderr,
2700                     gettext("Error: Stream can not be written to a terminal.\n"
2701                     "You must redirect standard output.\n"));
2702                 return (1);
2703         }
2704
2705         cp = strchr(argv[0], '@');
2706         if (cp == NULL) {
2707                 (void) fprintf(stderr,
2708                     gettext("argument must be a snapshot\n"));
2709                 usage(B_FALSE);
2710         }
2711         *cp = '\0';
2712         toname = cp + 1;
2713         zhp = zfs_open(g_zfs, argv[0], ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME);
2714         if (zhp == NULL)
2715                 return (1);
2716
2717         /*
2718          * If they specified the full path to the snapshot, chop off
2719          * everything except the short name of the snapshot, but special
2720          * case if they specify the origin.
2721          */
2722         if (fromname && (cp = strchr(fromname, '@')) != NULL) {
2723                 char origin[ZFS_MAXNAMELEN];
2724                 zprop_source_t src;
2725
2726                 (void) zfs_prop_get(zhp, ZFS_PROP_ORIGIN,
2727                     origin, sizeof (origin), &src, NULL, 0, B_FALSE);
2728
2729                 if (strcmp(origin, fromname) == 0) {
2730                         fromname = NULL;
2731                         flags.fromorigin = B_TRUE;
2732                 } else {
2733                         *cp = '\0';
2734                         if (cp != fromname && strcmp(argv[0], fromname)) {
2735                                 (void) fprintf(stderr,
2736                                     gettext("incremental source must be "
2737                                     "in same filesystem\n"));
2738                                 usage(B_FALSE);
2739                         }
2740                         fromname = cp + 1;
2741                         if (strchr(fromname, '@') || strchr(fromname, '/')) {
2742                                 (void) fprintf(stderr,
2743                                     gettext("invalid incremental source\n"));
2744                                 usage(B_FALSE);
2745                         }
2746                 }
2747         }
2748
2749         if (flags.replicate && fromname == NULL)
2750                 flags.doall = B_TRUE;
2751
2752         err = zfs_send(zhp, fromname, toname, flags, STDOUT_FILENO, NULL, 0,
2753             extraverbose ? &dbgnv : NULL);
2754
2755         if (extraverbose) {
2756                 /*
2757                  * dump_nvlist prints to stdout, but that's been
2758                  * redirected to a file.  Make it print to stderr
2759                  * instead.
2760                  */
2761                 (void) dup2(STDERR_FILENO, STDOUT_FILENO);
2762                 dump_nvlist(dbgnv, 0);
2763                 nvlist_free(dbgnv);
2764         }
2765         zfs_close(zhp);
2766
2767         return (err != 0);
2768 }
2769
2770 /*
2771  * zfs receive [-vnFu] [-d | -e] <fs@snap>
2772  *
2773  * Restore a backup stream from stdin.
2774  */
2775 static int
2776 zfs_do_receive(int argc, char **argv)
2777 {
2778         int c, err;
2779         recvflags_t flags = { 0 };
2780
2781         /* check options */
2782         while ((c = getopt(argc, argv, ":denuvF")) != -1) {
2783                 switch (c) {
2784                 case 'd':
2785                         flags.isprefix = B_TRUE;
2786                         break;
2787                 case 'e':
2788                         flags.isprefix = B_TRUE;
2789                         flags.istail = B_TRUE;
2790                         break;
2791                 case 'n':
2792                         flags.dryrun = B_TRUE;
2793                         break;
2794                 case 'u':
2795                         flags.nomount = B_TRUE;
2796                         break;
2797                 case 'v':
2798                         flags.verbose = B_TRUE;
2799                         break;
2800                 case 'F':
2801                         flags.force = B_TRUE;
2802                         break;
2803                 case ':':
2804                         (void) fprintf(stderr, gettext("missing argument for "
2805                             "'%c' option\n"), optopt);
2806                         usage(B_FALSE);
2807                         break;
2808                 case '?':
2809                         (void) fprintf(stderr, gettext("invalid option '%c'\n"),
2810                             optopt);
2811                         usage(B_FALSE);
2812                 }
2813         }
2814
2815         argc -= optind;
2816         argv += optind;
2817
2818         /* check number of arguments */
2819         if (argc < 1) {
2820                 (void) fprintf(stderr, gettext("missing snapshot argument\n"));
2821                 usage(B_FALSE);
2822         }
2823         if (argc > 1) {
2824                 (void) fprintf(stderr, gettext("too many arguments\n"));
2825                 usage(B_FALSE);
2826         }
2827
2828         if (isatty(STDIN_FILENO)) {
2829                 (void) fprintf(stderr,
2830                     gettext("Error: Backup stream can not be read "
2831                     "from a terminal.\n"
2832                     "You must redirect standard input.\n"));
2833                 return (1);
2834         }
2835
2836         err = zfs_receive(g_zfs, argv[0], flags, STDIN_FILENO, NULL);
2837
2838         return (err != 0);
2839 }
2840
2841 static int
2842 zfs_do_hold_rele_impl(int argc, char **argv, boolean_t holding)
2843 {
2844         int errors = 0;
2845         int i;
2846         const char *tag;
2847         boolean_t recursive = B_FALSE;
2848         boolean_t temphold = B_FALSE;
2849         const char *opts = holding ? "rt" : "r";
2850         int c;
2851
2852         /* check options */
2853         while ((c = getopt(argc, argv, opts)) != -1) {
2854                 switch (c) {
2855                 case 'r':
2856                         recursive = B_TRUE;
2857                         break;
2858                 case 't':
2859                         temphold = B_TRUE;
2860                         break;
2861                 case '?':
2862                         (void) fprintf(stderr, gettext("invalid option '%c'\n"),
2863                             optopt);
2864                         usage(B_FALSE);
2865                 }
2866         }
2867
2868         argc -= optind;
2869         argv += optind;
2870
2871         /* check number of arguments */
2872         if (argc < 2)
2873                 usage(B_FALSE);
2874
2875         tag = argv[0];
2876         --argc;
2877         ++argv;
2878
2879         if (holding && tag[0] == '.') {
2880                 /* tags starting with '.' are reserved for libzfs */
2881                 (void) fprintf(stderr, gettext("tag may not start with '.'\n"));
2882                 usage(B_FALSE);
2883         }
2884
2885         for (i = 0; i < argc; ++i) {
2886                 zfs_handle_t *zhp;
2887                 char parent[ZFS_MAXNAMELEN];
2888                 const char *delim;
2889                 char *path = argv[i];
2890
2891                 delim = strchr(path, '@');
2892                 if (delim == NULL) {
2893                         (void) fprintf(stderr,
2894                             gettext("'%s' is not a snapshot\n"), path);
2895                         ++errors;
2896                         continue;
2897                 }
2898                 (void) strncpy(parent, path, delim - path);
2899                 parent[delim - path] = '\0';
2900
2901                 zhp = zfs_open(g_zfs, parent,
2902                     ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME);
2903                 if (zhp == NULL) {
2904                         ++errors;
2905                         continue;
2906                 }
2907                 if (holding) {
2908                         if (zfs_hold(zhp, delim+1, tag, recursive,
2909                             temphold, B_FALSE, -1, 0, 0) != 0)
2910                                 ++errors;
2911                 } else {
2912                         if (zfs_release(zhp, delim+1, tag, recursive) != 0)
2913                                 ++errors;
2914                 }
2915                 zfs_close(zhp);
2916         }
2917
2918         return (errors != 0);
2919 }
2920
2921 /*
2922  * zfs hold [-r] [-t] <tag> <snap> ...
2923  *
2924  *      -r      Recursively hold
2925  *      -t      Temporary hold (hidden option)
2926  *
2927  * Apply a user-hold with the given tag to the list of snapshots.
2928  */
2929 static int
2930 zfs_do_hold(int argc, char **argv)
2931 {
2932         return (zfs_do_hold_rele_impl(argc, argv, B_TRUE));
2933 }
2934
2935 /*
2936  * zfs release [-r] <tag> <snap> ...
2937  *
2938  *      -r      Recursively release
2939  *
2940  * Release a user-hold with the given tag from the list of snapshots.
2941  */
2942 static int
2943 zfs_do_release(int argc, char **argv)
2944 {
2945         return (zfs_do_hold_rele_impl(argc, argv, B_FALSE));
2946 }
2947
2948 #define CHECK_SPINNER 30
2949 #define SPINNER_TIME 3          /* seconds */
2950 #define MOUNT_TIME 5            /* seconds */
2951
2952 #ifdef HAVE_ZPL
2953 static int
2954 get_one_dataset(zfs_handle_t *zhp, void *data)
2955 {
2956         static char *spin[] = { "-", "\\", "|", "/" };
2957         static int spinval = 0;
2958         static int spincheck = 0;
2959         static time_t last_spin_time = (time_t)0;
2960         get_all_cb_t *cbp = data;
2961         zfs_type_t type = zfs_get_type(zhp);
2962
2963         if (cbp->cb_verbose) {
2964                 if (--spincheck < 0) {
2965                         time_t now = time(NULL);
2966                         if (last_spin_time + SPINNER_TIME < now) {
2967                                 update_progress(spin[spinval++ % 4]);
2968                                 last_spin_time = now;
2969                         }
2970                         spincheck = CHECK_SPINNER;
2971                 }
2972         }
2973
2974         /*
2975          * Interate over any nested datasets.
2976          */
2977         if (zfs_iter_filesystems(zhp, get_one_dataset, data) != 0) {
2978                 zfs_close(zhp);
2979                 return (1);
2980         }
2981
2982         /*
2983          * Skip any datasets whose type does not match.
2984          */
2985         if ((type & ZFS_TYPE_FILESYSTEM) == 0) {
2986                 zfs_close(zhp);
2987                 return (0);
2988         }
2989         libzfs_add_handle(cbp, zhp);
2990         assert(cbp->cb_used <= cbp->cb_alloc);
2991
2992         return (0);
2993 }
2994
2995 static void
2996 get_all_datasets(zfs_handle_t ***dslist, size_t *count, boolean_t verbose)
2997 {
2998         get_all_cb_t cb = { 0 };
2999         cb.cb_verbose = verbose;
3000         cb.cb_getone = get_one_dataset;
3001
3002         if (verbose)
3003                 set_progress_header(gettext("Reading ZFS config"));
3004         (void) zfs_iter_root(g_zfs, get_one_dataset, &cb);
3005
3006         *dslist = cb.cb_handles;
3007         *count = cb.cb_used;
3008
3009         if (verbose)
3010                 finish_progress(gettext("done."));
3011 }
3012
3013 /*
3014  * Generic callback for sharing or mounting filesystems.  Because the code is so
3015  * similar, we have a common function with an extra parameter to determine which
3016  * mode we are using.
3017  */
3018 #define OP_SHARE        0x1
3019 #define OP_MOUNT        0x2
3020
3021 /*
3022  * Share or mount a dataset.
3023  */
3024 static int
3025 share_mount_one(zfs_handle_t *zhp, int op, int flags, char *protocol,
3026     boolean_t explicit, const char *options)
3027 {
3028         char mountpoint[ZFS_MAXPROPLEN];
3029         char shareopts[ZFS_MAXPROPLEN];
3030         char smbshareopts[ZFS_MAXPROPLEN];
3031         const char *cmdname = op == OP_SHARE ? "share" : "mount";
3032         struct mnttab mnt;
3033         uint64_t zoned, canmount;
3034         boolean_t shared_nfs, shared_smb;
3035
3036         assert(zfs_get_type(zhp) & ZFS_TYPE_FILESYSTEM);
3037
3038         /*
3039          * Check to make sure we can mount/share this dataset.  If we
3040          * are in the global zone and the filesystem is exported to a
3041          * local zone, or if we are in a local zone and the
3042          * filesystem is not exported, then it is an error.
3043          */
3044         zoned = zfs_prop_get_int(zhp, ZFS_PROP_ZONED);
3045
3046         if (zoned && getzoneid() == GLOBAL_ZONEID) {
3047                 if (!explicit)
3048                         return (0);
3049
3050                 (void) fprintf(stderr, gettext("cannot %s '%s': "
3051                     "dataset is exported to a local zone\n"), cmdname,
3052                     zfs_get_name(zhp));
3053                 return (1);
3054
3055         } else if (!zoned && getzoneid() != GLOBAL_ZONEID) {
3056                 if (!explicit)
3057                         return (0);
3058
3059                 (void) fprintf(stderr, gettext("cannot %s '%s': "
3060                     "permission denied\n"), cmdname,
3061                     zfs_get_name(zhp));
3062                 return (1);
3063         }
3064
3065         /*
3066          * Ignore any filesystems which don't apply to us. This
3067          * includes those with a legacy mountpoint, or those with
3068          * legacy share options.
3069          */
3070         verify(zfs_prop_get(zhp, ZFS_PROP_MOUNTPOINT, mountpoint,
3071             sizeof (mountpoint), NULL, NULL, 0, B_FALSE) == 0);
3072         verify(zfs_prop_get(zhp, ZFS_PROP_SHARENFS, shareopts,
3073             sizeof (shareopts), NULL, NULL, 0, B_FALSE) == 0);
3074         verify(zfs_prop_get(zhp, ZFS_PROP_SHARESMB, smbshareopts,
3075             sizeof (smbshareopts), NULL, NULL, 0, B_FALSE) == 0);
3076
3077         if (op == OP_SHARE && strcmp(shareopts, "off") == 0 &&
3078             strcmp(smbshareopts, "off") == 0) {
3079                 if (!explicit)
3080                         return (0);
3081
3082                 (void) fprintf(stderr, gettext("cannot share '%s': "
3083                     "legacy share\n"), zfs_get_name(zhp));
3084                 (void) fprintf(stderr, gettext("use share(1M) to "
3085                     "share this filesystem, or set "
3086                     "sharenfs property on\n"));
3087                 return (1);
3088         }
3089
3090         /*
3091          * We cannot share or mount legacy filesystems. If the
3092          * shareopts is non-legacy but the mountpoint is legacy, we
3093          * treat it as a legacy share.
3094          */
3095         if (strcmp(mountpoint, "legacy") == 0) {
3096                 if (!explicit)
3097                         return (0);
3098
3099                 (void) fprintf(stderr, gettext("cannot %s '%s': "
3100                     "legacy mountpoint\n"), cmdname, zfs_get_name(zhp));
3101                 (void) fprintf(stderr, gettext("use %s(1M) to "
3102                     "%s this filesystem\n"), cmdname, cmdname);
3103                 return (1);
3104         }
3105
3106         if (strcmp(mountpoint, "none") == 0) {
3107                 if (!explicit)
3108                         return (0);
3109
3110                 (void) fprintf(stderr, gettext("cannot %s '%s': no "
3111                     "mountpoint set\n"), cmdname, zfs_get_name(zhp));
3112                 return (1);
3113         }
3114
3115         /*
3116          * canmount     explicit        outcome
3117          * on           no              pass through
3118          * on           yes             pass through
3119          * off          no              return 0
3120          * off          yes             display error, return 1
3121          * noauto       no              return 0
3122          * noauto       yes             pass through
3123          */
3124         canmount = zfs_prop_get_int(zhp, ZFS_PROP_CANMOUNT);
3125         if (canmount == ZFS_CANMOUNT_OFF) {
3126                 if (!explicit)
3127                         return (0);
3128
3129                 (void) fprintf(stderr, gettext("cannot %s '%s': "
3130                     "'canmount' property is set to 'off'\n"), cmdname,
3131                     zfs_get_name(zhp));
3132                 return (1);
3133         } else if (canmount == ZFS_CANMOUNT_NOAUTO && !explicit) {
3134                 return (0);
3135         }
3136
3137         /*
3138          * At this point, we have verified that the mountpoint and/or
3139          * shareopts are appropriate for auto management. If the
3140          * filesystem is already mounted or shared, return (failing
3141          * for explicit requests); otherwise mount or share the
3142          * filesystem.
3143          */
3144         switch (op) {
3145         case OP_SHARE:
3146
3147                 shared_nfs = zfs_is_shared_nfs(zhp, NULL);
3148                 shared_smb = zfs_is_shared_smb(zhp, NULL);
3149
3150                 if (shared_nfs && shared_smb ||
3151                     (shared_nfs && strcmp(shareopts, "on") == 0 &&
3152                     strcmp(smbshareopts, "off") == 0) ||
3153                     (shared_smb && strcmp(smbshareopts, "on") == 0 &&
3154                     strcmp(shareopts, "off") == 0)) {
3155                         if (!explicit)
3156                                 return (0);
3157
3158                         (void) fprintf(stderr, gettext("cannot share "
3159                             "'%s': filesystem already shared\n"),
3160                             zfs_get_name(zhp));
3161                         return (1);
3162                 }
3163
3164                 if (!zfs_is_mounted(zhp, NULL) &&
3165                     zfs_mount(zhp, NULL, 0) != 0)
3166                         return (1);
3167
3168                 if (protocol == NULL) {
3169                         if (zfs_shareall(zhp) != 0)
3170                                 return (1);
3171                 } else if (strcmp(protocol, "nfs") == 0) {
3172                         if (zfs_share_nfs(zhp))
3173                                 return (1);
3174                 } else if (strcmp(protocol, "smb") == 0) {
3175                         if (zfs_share_smb(zhp))
3176                                 return (1);
3177                 } else {
3178                         (void) fprintf(stderr, gettext("cannot share "
3179                             "'%s': invalid share type '%s' "
3180                             "specified\n"),
3181                             zfs_get_name(zhp), protocol);
3182                         return (1);
3183                 }
3184
3185                 break;
3186
3187         case OP_MOUNT:
3188                 if (options == NULL)
3189                         mnt.mnt_mntopts = "";
3190                 else
3191                         mnt.mnt_mntopts = (char *)options;
3192
3193                 if (!hasmntopt(&mnt, MNTOPT_REMOUNT) &&
3194                     zfs_is_mounted(zhp, NULL)) {
3195                         if (!explicit)
3196                                 return (0);
3197
3198                         (void) fprintf(stderr, gettext("cannot mount "
3199                             "'%s': filesystem already mounted\n"),
3200                             zfs_get_name(zhp));
3201                         return (1);
3202                 }
3203
3204                 if (zfs_mount(zhp, options, flags) != 0)
3205                         return (1);
3206                 break;
3207         }
3208
3209         return (0);
3210 }
3211
3212 /*
3213  * Reports progress in the form "(current/total)".  Not thread-safe.
3214  */
3215 static void
3216 report_mount_progress(int current, int total)
3217 {
3218         static time_t last_progress_time = 0;
3219         time_t now = time(NULL);
3220         char info[32];
3221
3222         /* report 1..n instead of 0..n-1 */
3223         ++current;
3224
3225         /* display header if we're here for the first time */
3226         if (current == 1) {
3227                 set_progress_header(gettext("Mounting ZFS filesystems"));
3228         } else if (current != total && last_progress_time + MOUNT_TIME >= now) {
3229                 /* too soon to report again */
3230                 return;
3231         }
3232
3233         last_progress_time = now;
3234
3235         (void) sprintf(info, "(%d/%d)", current, total);
3236
3237         if (current == total)
3238                 finish_progress(info);
3239         else
3240                 update_progress(info);
3241 }
3242
3243 static void
3244 append_options(char *mntopts, char *newopts)
3245 {
3246         int len = strlen(mntopts);
3247
3248         /* original length plus new string to append plus 1 for the comma */
3249         if (len + 1 + strlen(newopts) >= MNT_LINE_MAX) {
3250                 (void) fprintf(stderr, gettext("the opts argument for "
3251                     "'%s' option is too long (more than %d chars)\n"),
3252                     "-o", MNT_LINE_MAX);
3253                 usage(B_FALSE);
3254         }
3255
3256         if (*mntopts)
3257                 mntopts[len++] = ',';
3258
3259         (void) strcpy(&mntopts[len], newopts);
3260 }
3261
3262 static int
3263 share_mount(int op, int argc, char **argv)
3264 {
3265         int do_all = 0;
3266         boolean_t verbose = B_FALSE;
3267         int c, ret = 0;
3268         char *options = NULL;
3269         int flags = 0;
3270
3271         /* check options */
3272         while ((c = getopt(argc, argv, op == OP_MOUNT ? ":avo:O" : "a"))
3273             != -1) {
3274                 switch (c) {
3275                 case 'a':
3276                         do_all = 1;
3277                         break;
3278                 case 'v':
3279                         verbose = B_TRUE;
3280                         break;
3281                 case 'o':
3282                         if (*optarg == '\0') {
3283                                 (void) fprintf(stderr, gettext("empty mount "
3284                                     "options (-o) specified\n"));
3285                                 usage(B_FALSE);
3286                         }
3287
3288                         if (options == NULL)
3289                                 options = safe_malloc(MNT_LINE_MAX + 1);
3290
3291                         /* option validation is done later */
3292                         append_options(options, optarg);
3293                         break;
3294
3295                 case 'O':
3296                         flags |= MS_OVERLAY;
3297                         break;
3298                 case ':':
3299                         (void) fprintf(stderr, gettext("missing argument for "
3300                             "'%c' option\n"), optopt);
3301                         usage(B_FALSE);
3302                         break;
3303                 case '?':
3304                         (void) fprintf(stderr, gettext("invalid option '%c'\n"),
3305                             optopt);
3306                         usage(B_FALSE);
3307                 }
3308         }
3309
3310         argc -= optind;
3311         argv += optind;
3312
3313         /* check number of arguments */
3314         if (do_all) {
3315                 zfs_handle_t **dslist = NULL;
3316                 size_t i, count = 0;
3317                 char *protocol = NULL;
3318
3319                 if (op == OP_SHARE && argc > 0) {
3320                         if (strcmp(argv[0], "nfs") != 0 &&
3321                             strcmp(argv[0], "smb") != 0) {
3322                                 (void) fprintf(stderr, gettext("share type "
3323                                     "must be 'nfs' or 'smb'\n"));
3324                                 usage(B_FALSE);
3325                         }
3326                         protocol = argv[0];
3327                         argc--;
3328                         argv++;
3329                 }
3330
3331                 if (argc != 0) {
3332                         (void) fprintf(stderr, gettext("too many arguments\n"));
3333                         usage(B_FALSE);
3334                 }
3335
3336                 start_progress_timer();
3337                 get_all_datasets(&dslist, &count, verbose);
3338
3339                 if (count == 0)
3340                         return (0);
3341
3342                 qsort(dslist, count, sizeof (void *), libzfs_dataset_cmp);
3343
3344                 for (i = 0; i < count; i++) {
3345                         if (verbose)
3346                                 report_mount_progress(i, count);
3347
3348                         if (share_mount_one(dslist[i], op, flags, protocol,
3349                             B_FALSE, options) != 0)
3350                                 ret = 1;
3351                         zfs_close(dslist[i]);
3352                 }
3353
3354                 free(dslist);
3355         } else if (argc == 0) {
3356                 struct mnttab entry;
3357
3358                 if ((op == OP_SHARE) || (options != NULL)) {
3359                         (void) fprintf(stderr, gettext("missing filesystem "
3360                             "argument (specify -a for all)\n"));
3361                         usage(B_FALSE);
3362                 }
3363
3364                 /*
3365                  * When mount is given no arguments, go through /etc/mnttab and
3366                  * display any active ZFS mounts.  We hide any snapshots, since
3367                  * they are controlled automatically.
3368                  */
3369                 rewind(mnttab_file);
3370                 while (getmntent(mnttab_file, &entry) == 0) {
3371                         if (strcmp(entry.mnt_fstype, MNTTYPE_ZFS) != 0 ||
3372                             strchr(entry.mnt_special, '@') != NULL)
3373                                 continue;
3374
3375                         (void) printf("%-30s  %s\n", entry.mnt_special,
3376                             entry.mnt_mountp);
3377                 }
3378
3379         } else {
3380                 zfs_handle_t *zhp;
3381
3382                 if (argc > 1) {
3383                         (void) fprintf(stderr,
3384                             gettext("too many arguments\n"));
3385                         usage(B_FALSE);
3386                 }
3387
3388                 if ((zhp = zfs_open(g_zfs, argv[0],
3389                     ZFS_TYPE_FILESYSTEM)) == NULL) {
3390                         ret = 1;
3391                 } else {
3392                         ret = share_mount_one(zhp, op, flags, NULL, B_TRUE,
3393                             options);
3394                         zfs_close(zhp);
3395                 }
3396         }
3397
3398         return (ret);
3399 }
3400 #endif  /* HAVE_ZPL */
3401
3402 /*
3403  * zfs mount -a [nfs]
3404  * zfs mount filesystem
3405  *
3406  * Mount all filesystems, or mount the given filesystem.
3407  */
3408 static int
3409 zfs_do_mount(int argc, char **argv)
3410 {
3411 #ifdef HAVE_ZPL
3412         return (share_mount(OP_MOUNT, argc, argv));
3413 #else
3414         return ENOSYS;
3415 #endif  /* HAVE_ZPL */
3416 }
3417
3418 /*
3419  * zfs share -a [nfs | smb]
3420  * zfs share filesystem
3421  *
3422  * Share all filesystems, or share the given filesystem.
3423  */
3424 static int
3425 zfs_do_share(int argc, char **argv)
3426 {
3427 #ifdef HAVE_ZPL
3428         return (share_mount(OP_SHARE, argc, argv));
3429 #else
3430         return ENOSYS;
3431 #endif  /* HAVE_ZPL */
3432 }
3433
3434 #ifdef HAVE_ZPL
3435 typedef struct unshare_unmount_node {
3436         zfs_handle_t    *un_zhp;
3437         char            *un_mountp;
3438         uu_avl_node_t   un_avlnode;
3439 } unshare_unmount_node_t;
3440
3441 /* ARGSUSED */
3442 static int
3443 unshare_unmount_compare(const void *larg, const void *rarg, void *unused)
3444 {
3445         const unshare_unmount_node_t *l = larg;
3446         const unshare_unmount_node_t *r = rarg;
3447
3448         return (strcmp(l->un_mountp, r->un_mountp));
3449 }
3450
3451 /*
3452  * Convenience routine used by zfs_do_umount() and manual_unmount().  Given an
3453  * absolute path, find the entry /etc/mnttab, verify that its a ZFS filesystem,
3454  * and unmount it appropriately.
3455  */
3456 static int
3457 unshare_unmount_path(int op, char *path, int flags, boolean_t is_manual)
3458 {
3459         zfs_handle_t *zhp;
3460         int ret;
3461         struct stat64 statbuf;
3462         struct extmnttab entry;
3463         const char *cmdname = (op == OP_SHARE) ? "unshare" : "unmount";
3464         ino_t path_inode;
3465
3466         /*
3467          * Search for the path in /etc/mnttab.  Rather than looking for the
3468          * specific path, which can be fooled by non-standard paths (i.e. ".."
3469          * or "//"), we stat() the path and search for the corresponding
3470          * (major,minor) device pair.
3471          */
3472         if (stat64(path, &statbuf) != 0) {
3473                 (void) fprintf(stderr, gettext("cannot %s '%s': %s\n"),
3474                     cmdname, path, strerror(errno));
3475                 return (1);
3476         }
3477         path_inode = statbuf.st_ino;
3478
3479         /*
3480          * Search for the given (major,minor) pair in the mount table.
3481          */
3482         rewind(mnttab_file);
3483         while ((ret = getextmntent(mnttab_file, &entry, 0)) == 0) {
3484                 if (entry.mnt_major == major(statbuf.st_dev) &&
3485                     entry.mnt_minor == minor(statbuf.st_dev))
3486                         break;
3487         }
3488         if (ret != 0) {
3489                 if (op == OP_SHARE) {
3490                         (void) fprintf(stderr, gettext("cannot %s '%s': not "
3491                             "currently mounted\n"), cmdname, path);
3492                         return (1);
3493                 }
3494                 (void) fprintf(stderr, gettext("warning: %s not in mnttab\n"),
3495                     path);
3496                 if ((ret = umount2(path, flags)) != 0)
3497                         (void) fprintf(stderr, gettext("%s: %s\n"), path,
3498                             strerror(errno));
3499                 return (ret != 0);
3500         }
3501
3502         if (strcmp(entry.mnt_fstype, MNTTYPE_ZFS) != 0) {
3503                 (void) fprintf(stderr, gettext("cannot %s '%s': not a ZFS "
3504                     "filesystem\n"), cmdname, path);
3505                 return (1);
3506         }
3507
3508         if ((zhp = zfs_open(g_zfs, entry.mnt_special,
3509             ZFS_TYPE_FILESYSTEM)) == NULL)
3510                 return (1);
3511
3512         ret = 1;
3513         if (stat64(entry.mnt_mountp, &statbuf) != 0) {
3514                 (void) fprintf(stderr, gettext("cannot %s '%s': %s\n"),
3515                     cmdname, path, strerror(errno));
3516                 goto out;
3517         } else if (statbuf.st_ino != path_inode) {
3518                 (void) fprintf(stderr, gettext("cannot "
3519                     "%s '%s': not a mountpoint\n"), cmdname, path);
3520                 goto out;
3521         }
3522
3523         if (op == OP_SHARE) {
3524                 char nfs_mnt_prop[ZFS_MAXPROPLEN];
3525                 char smbshare_prop[ZFS_MAXPROPLEN];
3526
3527                 verify(zfs_prop_get(zhp, ZFS_PROP_SHARENFS, nfs_mnt_prop,
3528                     sizeof (nfs_mnt_prop), NULL, NULL, 0, B_FALSE) == 0);
3529                 verify(zfs_prop_get(zhp, ZFS_PROP_SHARESMB, smbshare_prop,
3530                     sizeof (smbshare_prop), NULL, NULL, 0, B_FALSE) == 0);
3531
3532                 if (strcmp(nfs_mnt_prop, "off") == 0 &&
3533                     strcmp(smbshare_prop, "off") == 0) {
3534                         (void) fprintf(stderr, gettext("cannot unshare "
3535                             "'%s': legacy share\n"), path);
3536                         (void) fprintf(stderr, gettext("use "
3537                             "unshare(1M) to unshare this filesystem\n"));
3538                 } else if (!zfs_is_shared(zhp)) {
3539                         (void) fprintf(stderr, gettext("cannot unshare '%s': "
3540                             "not currently shared\n"), path);
3541                 } else {
3542                         ret = zfs_unshareall_bypath(zhp, path);
3543                 }
3544         } else {
3545                 char mtpt_prop[ZFS_MAXPROPLEN];
3546
3547                 verify(zfs_prop_get(zhp, ZFS_PROP_MOUNTPOINT, mtpt_prop,
3548                     sizeof (mtpt_prop), NULL, NULL, 0, B_FALSE) == 0);
3549
3550                 if (is_manual) {
3551                         ret = zfs_unmount(zhp, NULL, flags);
3552                 } else if (strcmp(mtpt_prop, "legacy") == 0) {
3553                         (void) fprintf(stderr, gettext("cannot unmount "
3554                             "'%s': legacy mountpoint\n"),
3555                             zfs_get_name(zhp));
3556                         (void) fprintf(stderr, gettext("use umount(1M) "
3557                             "to unmount this filesystem\n"));
3558                 } else {
3559                         ret = zfs_unmountall(zhp, flags);
3560                 }
3561         }
3562
3563 out:
3564         zfs_close(zhp);
3565
3566         return (ret != 0);
3567 }
3568
3569 /*
3570  * Generic callback for unsharing or unmounting a filesystem.
3571  */
3572 static int
3573 unshare_unmount(int op, int argc, char **argv)
3574 {
3575         int do_all = 0;
3576         int flags = 0;
3577         int ret = 0;
3578         int c;
3579         zfs_handle_t *zhp;
3580         char nfs_mnt_prop[ZFS_MAXPROPLEN];
3581         char sharesmb[ZFS_MAXPROPLEN];
3582
3583         /* check options */
3584         while ((c = getopt(argc, argv, op == OP_SHARE ? "a" : "af")) != -1) {
3585                 switch (c) {
3586                 case 'a':
3587                         do_all = 1;
3588                         break;
3589                 case 'f':
3590                         flags = MS_FORCE;
3591                         break;
3592                 case '?':
3593                         (void) fprintf(stderr, gettext("invalid option '%c'\n"),
3594                             optopt);
3595                         usage(B_FALSE);
3596                 }
3597         }
3598
3599         argc -= optind;
3600         argv += optind;
3601
3602         if (do_all) {
3603                 /*
3604                  * We could make use of zfs_for_each() to walk all datasets in
3605                  * the system, but this would be very inefficient, especially
3606                  * since we would have to linearly search /etc/mnttab for each
3607                  * one.  Instead, do one pass through /etc/mnttab looking for
3608                  * zfs entries and call zfs_unmount() for each one.
3609                  *
3610                  * Things get a little tricky if the administrator has created
3611                  * mountpoints beneath other ZFS filesystems.  In this case, we
3612                  * have to unmount the deepest filesystems first.  To accomplish
3613                  * this, we place all the mountpoints in an AVL tree sorted by
3614                  * the special type (dataset name), and walk the result in
3615                  * reverse to make sure to get any snapshots first.
3616                  */
3617                 struct mnttab entry;
3618                 uu_avl_pool_t *pool;
3619                 uu_avl_t *tree;
3620                 unshare_unmount_node_t *node;
3621                 uu_avl_index_t idx;
3622                 uu_avl_walk_t *walk;
3623
3624                 if (argc != 0) {
3625                         (void) fprintf(stderr, gettext("too many arguments\n"));
3626                         usage(B_FALSE);
3627                 }
3628
3629                 if (((pool = uu_avl_pool_create("unmount_pool",
3630                     sizeof (unshare_unmount_node_t),
3631                     offsetof(unshare_unmount_node_t, un_avlnode),
3632                     unshare_unmount_compare, UU_DEFAULT)) == NULL) ||
3633                     ((tree = uu_avl_create(pool, NULL, UU_DEFAULT)) == NULL))
3634                         nomem();
3635
3636                 rewind(mnttab_file);
3637                 while (getmntent(mnttab_file, &entry) == 0) {
3638
3639                         /* ignore non-ZFS entries */
3640                         if (strcmp(entry.mnt_fstype, MNTTYPE_ZFS) != 0)
3641                                 continue;
3642
3643                         /* ignore snapshots */
3644                         if (strchr(entry.mnt_special, '@') != NULL)
3645                                 continue;
3646
3647                         if ((zhp = zfs_open(g_zfs, entry.mnt_special,
3648                             ZFS_TYPE_FILESYSTEM)) == NULL) {
3649                                 ret = 1;
3650                                 continue;
3651                         }
3652
3653                         switch (op) {
3654                         case OP_SHARE:
3655                                 verify(zfs_prop_get(zhp, ZFS_PROP_SHARENFS,
3656                                     nfs_mnt_prop,
3657                                     sizeof (nfs_mnt_prop),
3658                                     NULL, NULL, 0, B_FALSE) == 0);
3659                                 if (strcmp(nfs_mnt_prop, "off") != 0)
3660                                         break;
3661                                 verify(zfs_prop_get(zhp, ZFS_PROP_SHARESMB,
3662                                     nfs_mnt_prop,
3663                                     sizeof (nfs_mnt_prop),
3664                                     NULL, NULL, 0, B_FALSE) == 0);
3665                                 if (strcmp(nfs_mnt_prop, "off") == 0)
3666                                         continue;
3667                                 break;
3668                         case OP_MOUNT:
3669                                 /* Ignore legacy mounts */
3670                                 verify(zfs_prop_get(zhp, ZFS_PROP_MOUNTPOINT,
3671                                     nfs_mnt_prop,
3672                                     sizeof (nfs_mnt_prop),
3673                                     NULL, NULL, 0, B_FALSE) == 0);
3674                                 if (strcmp(nfs_mnt_prop, "legacy") == 0)
3675                                         continue;
3676                                 /* Ignore canmount=noauto mounts */
3677                                 if (zfs_prop_get_int(zhp, ZFS_PROP_CANMOUNT) ==
3678                                     ZFS_CANMOUNT_NOAUTO)
3679                                         continue;
3680                         default:
3681                                 break;
3682                         }
3683
3684                         node = safe_malloc(sizeof (unshare_unmount_node_t));
3685                         node->un_zhp = zhp;
3686                         node->un_mountp = safe_strdup(entry.mnt_mountp);
3687
3688                         uu_avl_node_init(node, &node->un_avlnode, pool);
3689
3690                         if (uu_avl_find(tree, node, NULL, &idx) == NULL) {
3691                                 uu_avl_insert(tree, node, idx);
3692                         } else {
3693                                 zfs_close(node->un_zhp);
3694                                 free(node->un_mountp);
3695                                 free(node);
3696                         }
3697                 }
3698
3699                 /*
3700                  * Walk the AVL tree in reverse, unmounting each filesystem and
3701                  * removing it from the AVL tree in the process.
3702                  */
3703                 if ((walk = uu_avl_walk_start(tree,
3704                     UU_WALK_REVERSE | UU_WALK_ROBUST)) == NULL)
3705                         nomem();
3706
3707                 while ((node = uu_avl_walk_next(walk)) != NULL) {
3708                         uu_avl_remove(tree, node);
3709
3710                         switch (op) {
3711                         case OP_SHARE:
3712                                 if (zfs_unshareall_bypath(node->un_zhp,
3713                                     node->un_mountp) != 0)
3714                                         ret = 1;
3715                                 break;
3716
3717                         case OP_MOUNT:
3718                                 if (zfs_unmount(node->un_zhp,
3719                                     node->un_mountp, flags) != 0)
3720                                         ret = 1;
3721                                 break;
3722                         }
3723
3724                         zfs_close(node->un_zhp);
3725                         free(node->un_mountp);
3726                         free(node);
3727                 }
3728
3729                 uu_avl_walk_end(walk);
3730                 uu_avl_destroy(tree);
3731                 uu_avl_pool_destroy(pool);
3732
3733         } else {
3734                 if (argc != 1) {
3735                         if (argc == 0)
3736                                 (void) fprintf(stderr,
3737                                     gettext("missing filesystem argument\n"));
3738                         else
3739                                 (void) fprintf(stderr,
3740                                     gettext("too many arguments\n"));
3741                         usage(B_FALSE);
3742                 }
3743
3744                 /*
3745                  * We have an argument, but it may be a full path or a ZFS
3746                  * filesystem.  Pass full paths off to unmount_path() (shared by
3747                  * manual_unmount), otherwise open the filesystem and pass to
3748                  * zfs_unmount().
3749                  */
3750                 if (argv[0][0] == '/')
3751                         return (unshare_unmount_path(op, argv[0],
3752                             flags, B_FALSE));
3753
3754                 if ((zhp = zfs_open(g_zfs, argv[0],
3755                     ZFS_TYPE_FILESYSTEM)) == NULL)
3756                         return (1);
3757
3758                 verify(zfs_prop_get(zhp, op == OP_SHARE ?
3759                     ZFS_PROP_SHARENFS : ZFS_PROP_MOUNTPOINT,
3760                     nfs_mnt_prop, sizeof (nfs_mnt_prop), NULL,
3761                     NULL, 0, B_FALSE) == 0);
3762
3763                 switch (op) {
3764                 case OP_SHARE:
3765                         verify(zfs_prop_get(zhp, ZFS_PROP_SHARENFS,
3766                             nfs_mnt_prop,
3767                             sizeof (nfs_mnt_prop),
3768                             NULL, NULL, 0, B_FALSE) == 0);
3769                         verify(zfs_prop_get(zhp, ZFS_PROP_SHARESMB,
3770                             sharesmb, sizeof (sharesmb), NULL, NULL,
3771                             0, B_FALSE) == 0);
3772
3773                         if (strcmp(nfs_mnt_prop, "off") == 0 &&
3774                             strcmp(sharesmb, "off") == 0) {
3775                                 (void) fprintf(stderr, gettext("cannot "
3776                                     "unshare '%s': legacy share\n"),
3777                                     zfs_get_name(zhp));
3778                                 (void) fprintf(stderr, gettext("use "
3779                                     "unshare(1M) to unshare this "
3780                                     "filesystem\n"));
3781                                 ret = 1;
3782                         } else if (!zfs_is_shared(zhp)) {
3783                                 (void) fprintf(stderr, gettext("cannot "
3784                                     "unshare '%s': not currently "
3785                                     "shared\n"), zfs_get_name(zhp));
3786                                 ret = 1;
3787                         } else if (zfs_unshareall(zhp) != 0) {
3788                                 ret = 1;
3789                         }
3790                         break;
3791
3792                 case OP_MOUNT:
3793                         if (strcmp(nfs_mnt_prop, "legacy") == 0) {
3794                                 (void) fprintf(stderr, gettext("cannot "
3795                                     "unmount '%s': legacy "
3796                                     "mountpoint\n"), zfs_get_name(zhp));
3797                                 (void) fprintf(stderr, gettext("use "
3798                                     "umount(1M) to unmount this "
3799                                     "filesystem\n"));
3800                                 ret = 1;
3801                         } else if (!zfs_is_mounted(zhp, NULL)) {
3802                                 (void) fprintf(stderr, gettext("cannot "
3803                                     "unmount '%s': not currently "
3804                                     "mounted\n"),
3805                                     zfs_get_name(zhp));
3806                                 ret = 1;
3807                         } else if (zfs_unmountall(zhp, flags) != 0) {
3808                                 ret = 1;
3809                         }
3810                         break;
3811                 }
3812
3813                 zfs_close(zhp);
3814         }
3815
3816         return (ret);
3817 }
3818 #endif  /* HAVE_ZPL */
3819
3820 /*
3821  * zfs unmount -a
3822  * zfs unmount filesystem
3823  *
3824  * Unmount all filesystems, or a specific ZFS filesystem.
3825  */
3826 static int
3827 zfs_do_unmount(int argc, char **argv)
3828 {
3829 #ifdef HAVE_ZPL
3830         return (unshare_unmount(OP_MOUNT, argc, argv));
3831 #else
3832         return ENOSYS;
3833 #endif  /* HAVE_ZPL */
3834 }
3835
3836 /*
3837  * zfs unshare -a
3838  * zfs unshare filesystem
3839  *
3840  * Unshare all filesystems, or a specific ZFS filesystem.
3841  */
3842 static int
3843 zfs_do_unshare(int argc, char **argv)
3844 {
3845 #ifdef HAVE_ZPL
3846         return (unshare_unmount(OP_SHARE, argc, argv));
3847 #else
3848         return ENOSYS;
3849 #endif  /* HAVE_ZPL */
3850 }
3851
3852 /* ARGSUSED */
3853 static int
3854 zfs_do_python(int argc, char **argv)
3855 {
3856         (void) execv(pypath, argv-1);
3857         (void) printf("internal error: %s not found\n", pypath);
3858         return (-1);
3859 }
3860
3861 /*
3862  * Called when invoked as /etc/fs/zfs/mount.  Do the mount if the mountpoint is
3863  * 'legacy'.  Otherwise, complain that use should be using 'zfs mount'.
3864  */
3865 #ifdef HAVE_ZPL
3866 static int
3867 manual_mount(int argc, char **argv)
3868 {
3869         zfs_handle_t *zhp;
3870         char mountpoint[ZFS_MAXPROPLEN];
3871         char mntopts[MNT_LINE_MAX] = { '\0' };
3872         int ret;
3873         int c;
3874         int flags = 0;
3875         char *dataset, *path;
3876
3877         /* check options */
3878         while ((c = getopt(argc, argv, ":mo:O")) != -1) {
3879                 switch (c) {
3880                 case 'o':
3881                         (void) strlcpy(mntopts, optarg, sizeof (mntopts));
3882                         break;
3883                 case 'O':
3884                         flags |= MS_OVERLAY;
3885                         break;
3886                 case 'm':
3887                         flags |= MS_NOMNTTAB;
3888                         break;
3889                 case ':':
3890                         (void) fprintf(stderr, gettext("missing argument for "
3891                             "'%c' option\n"), optopt);
3892                         usage(B_FALSE);
3893                         break;
3894                 case '?':
3895                         (void) fprintf(stderr, gettext("invalid option '%c'\n"),
3896                             optopt);
3897                         (void) fprintf(stderr, gettext("usage: mount [-o opts] "
3898                             "<path>\n"));
3899                         return (2);
3900                 }
3901         }
3902
3903         argc -= optind;
3904         argv += optind;
3905
3906         /* check that we only have two arguments */
3907         if (argc != 2) {
3908                 if (argc == 0)
3909                         (void) fprintf(stderr, gettext("missing dataset "
3910                             "argument\n"));
3911                 else if (argc == 1)
3912                         (void) fprintf(stderr,
3913                             gettext("missing mountpoint argument\n"));
3914                 else
3915                         (void) fprintf(stderr, gettext("too many arguments\n"));
3916                 (void) fprintf(stderr, "usage: mount <dataset> <mountpoint>\n");
3917                 return (2);
3918         }
3919
3920         dataset = argv[0];
3921         path = argv[1];
3922
3923         /* try to open the dataset */
3924         if ((zhp = zfs_open(g_zfs, dataset, ZFS_TYPE_FILESYSTEM)) == NULL)
3925                 return (1);
3926
3927         (void) zfs_prop_get(zhp, ZFS_PROP_MOUNTPOINT, mountpoint,
3928             sizeof (mountpoint), NULL, NULL, 0, B_FALSE);
3929
3930         /* check for legacy mountpoint and complain appropriately */
3931         ret = 0;
3932         if (strcmp(mountpoint, ZFS_MOUNTPOINT_LEGACY) == 0) {
3933                 if (mount(dataset, path, MS_OPTIONSTR | flags, MNTTYPE_ZFS,
3934                     NULL, 0, mntopts, sizeof (mntopts)) != 0) {
3935                         (void) fprintf(stderr, gettext("mount failed: %s\n"),
3936                             strerror(errno));
3937                         ret = 1;
3938                 }
3939         } else {
3940                 (void) fprintf(stderr, gettext("filesystem '%s' cannot be "
3941                     "mounted using 'mount -F zfs'\n"), dataset);
3942                 (void) fprintf(stderr, gettext("Use 'zfs set mountpoint=%s' "
3943                     "instead.\n"), path);
3944                 (void) fprintf(stderr, gettext("If you must use 'mount -F zfs' "
3945                     "or /etc/vfstab, use 'zfs set mountpoint=legacy'.\n"));
3946                 (void) fprintf(stderr, gettext("See zfs(1M) for more "
3947                     "information.\n"));
3948                 ret = 1;
3949         }
3950
3951         return (ret);
3952 }
3953
3954 /*
3955  * Called when invoked as /etc/fs/zfs/umount.  Unlike a manual mount, we allow
3956  * unmounts of non-legacy filesystems, as this is the dominant administrative
3957  * interface.
3958  */
3959 static int
3960 manual_unmount(int argc, char **argv)
3961 {
3962         int flags = 0;
3963         int c;
3964
3965         /* check options */
3966         while ((c = getopt(argc, argv, "f")) != -1) {
3967                 switch (c) {
3968                 case 'f':
3969                         flags = MS_FORCE;
3970                         break;
3971                 case '?':
3972                         (void) fprintf(stderr, gettext("invalid option '%c'\n"),
3973                             optopt);
3974                         (void) fprintf(stderr, gettext("usage: unmount [-f] "
3975                             "<path>\n"));
3976                         return (2);
3977                 }
3978         }
3979
3980         argc -= optind;
3981         argv += optind;
3982
3983         /* check arguments */
3984         if (argc != 1) {
3985                 if (argc == 0)
3986                         (void) fprintf(stderr, gettext("missing path "
3987                             "argument\n"));
3988                 else
3989                         (void) fprintf(stderr, gettext("too many arguments\n"));
3990                 (void) fprintf(stderr, gettext("usage: unmount [-f] <path>\n"));
3991                 return (2);
3992         }
3993
3994         return (unshare_unmount_path(OP_MOUNT, argv[0], flags, B_TRUE));
3995 }
3996 #endif /* HAVE_ZPL */
3997
3998 static int
3999 find_command_idx(char *command, int *idx)
4000 {
4001         int i;
4002
4003         for (i = 0; i < NCOMMAND; i++) {
4004                 if (command_table[i].name == NULL)
4005                         continue;
4006
4007                 if (strcmp(command, command_table[i].name) == 0) {
4008                         *idx = i;
4009                         return (0);
4010                 }
4011         }
4012         return (1);
4013 }
4014
4015 static int
4016 zfs_do_diff(int argc, char **argv)
4017 {
4018         zfs_handle_t *zhp;
4019         int flags = 0;
4020         char *tosnap = NULL;
4021         char *fromsnap = NULL;
4022         char *atp, *copy;
4023         int err;
4024         int c;
4025
4026         while ((c = getopt(argc, argv, "FHt")) != -1) {
4027                 switch (c) {
4028                 case 'F':
4029                         flags |= ZFS_DIFF_CLASSIFY;
4030                         break;
4031                 case 'H':
4032                         flags |= ZFS_DIFF_PARSEABLE;
4033                         break;
4034                 case 't':
4035                         flags |= ZFS_DIFF_TIMESTAMP;
4036                         break;
4037                 default:
4038                         (void) fprintf(stderr,
4039                             gettext("invalid option '%c'\n"), optopt);
4040                         usage(B_FALSE);
4041                 }
4042         }
4043
4044         argc -= optind;
4045         argv += optind;
4046
4047         if (argc < 1) {
4048                 (void) fprintf(stderr,
4049                 gettext("must provide at least one snapshot name\n"));
4050                 usage(B_FALSE);
4051         }
4052
4053         if (argc > 2) {
4054                 (void) fprintf(stderr, gettext("too many arguments\n"));
4055                 usage(B_FALSE);
4056         }
4057
4058         fromsnap = argv[0];
4059         tosnap = (argc == 2) ? argv[1] : NULL;
4060
4061         copy = NULL;
4062         if (*fromsnap != '@')
4063                 copy = strdup(fromsnap);
4064         else if (tosnap)
4065                 copy = strdup(tosnap);
4066         if (copy == NULL)
4067                 usage(B_FALSE);
4068
4069         if ((atp = strchr(copy, '@')))
4070                 *atp = '\0';
4071
4072         if ((zhp = zfs_open(g_zfs, copy, ZFS_TYPE_FILESYSTEM)) == NULL)
4073                 return (1);
4074
4075         free(copy);
4076
4077         /*
4078          * Ignore SIGPIPE so that the library can give us
4079          * information on any failure
4080          */
4081         (void) sigignore(SIGPIPE);
4082
4083         err = zfs_show_diffs(zhp, STDOUT_FILENO, fromsnap, tosnap, flags);
4084
4085         zfs_close(zhp);
4086
4087         return (err != 0);
4088 }
4089
4090 int
4091 main(int argc, char **argv)
4092 {
4093         int ret;
4094         int i = 0;
4095 #ifdef HAVE_ZPL
4096         char *progname;
4097 #endif
4098         char *cmdname;
4099
4100         (void) setlocale(LC_ALL, "");
4101         (void) textdomain(TEXT_DOMAIN);
4102
4103         opterr = 0;
4104
4105         if ((g_zfs = libzfs_init()) == NULL) {
4106                 (void) fprintf(stderr, gettext("internal error: failed to "
4107                     "initialize ZFS library\n"));
4108                 return (1);
4109         }
4110
4111         zpool_set_history_str("zfs", argc, argv, history_str);
4112         verify(zpool_stage_history(g_zfs, history_str) == 0);
4113
4114         libzfs_print_on_error(g_zfs, B_TRUE);
4115
4116         if ((mnttab_file = fopen(MNTTAB, "r")) == NULL) {
4117                 (void) fprintf(stderr, gettext("internal error: unable to "
4118                     "open %s\n"), MNTTAB);
4119                 return (1);
4120         }
4121
4122 #ifdef HAVE_ZPL
4123         /*
4124          * This command also doubles as the /etc/fs mount and unmount program.
4125          * Determine if we should take this behavior based on argv[0].
4126          */
4127         progname = basename(argv[0]);
4128         if (strcmp(progname, "mount") == 0) {
4129                 ret = manual_mount(argc, argv);
4130         } else if (strcmp(progname, "umount") == 0) {
4131                 ret = manual_unmount(argc, argv);
4132         } else {
4133 #else
4134         {
4135 #endif /* HAVE_ZPL */
4136                 /*
4137                  * Make sure the user has specified some command.
4138                  */
4139                 if (argc < 2) {
4140                         (void) fprintf(stderr, gettext("missing command\n"));
4141                         usage(B_FALSE);
4142                 }
4143
4144                 cmdname = argv[1];
4145
4146                 /*
4147                  * The 'umount' command is an alias for 'unmount'
4148                  */
4149                 if (strcmp(cmdname, "umount") == 0)
4150                         cmdname = "unmount";
4151
4152                 /*
4153                  * The 'recv' command is an alias for 'receive'
4154                  */
4155                 if (strcmp(cmdname, "recv") == 0)
4156                         cmdname = "receive";
4157
4158                 /*
4159                  * Special case '-?'
4160                  */
4161                 if (strcmp(cmdname, "-?") == 0)
4162                         usage(B_TRUE);
4163
4164                 /*
4165                  * Run the appropriate command.
4166                  */
4167                 libzfs_mnttab_cache(g_zfs, B_TRUE);
4168                 if (find_command_idx(cmdname, &i) == 0) {
4169                         current_command = &command_table[i];
4170                         ret = command_table[i].func(argc - 1, argv + 1);
4171                 } else if (strchr(cmdname, '=') != NULL) {
4172                         verify(find_command_idx("set", &i) == 0);
4173                         current_command = &command_table[i];
4174                         ret = command_table[i].func(argc, argv);
4175                 } else {
4176                         (void) fprintf(stderr, gettext("unrecognized "
4177                             "command '%s'\n"), cmdname);
4178                         usage(B_FALSE);
4179                         ret = 1;
4180                 }
4181                 libzfs_mnttab_cache(g_zfs, B_FALSE);
4182         }
4183
4184         (void) fclose(mnttab_file);
4185
4186         libzfs_fini(g_zfs);
4187
4188         /*
4189          * The 'ZFS_ABORT' environment variable causes us to dump core on exit
4190          * for the purposes of running ::findleaks.
4191          */
4192         if (getenv("ZFS_ABORT") != NULL) {
4193                 (void) printf("dumping core by request\n");
4194                 abort();
4195         }
4196
4197         return (ret);
4198 }