cddl/contrib/opensolaris/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  * Copyright 2012 Nexenta Systems, Inc. All rights reserved.
  25  * Copyright (c) 2012 by Delphix. All rights reserved.
  26  * Copyright 2012 Milan Jurik. All rights reserved.
  27  * Copyright (c) 2012, Joyent, Inc. All rights reserved.
  28  * Copyright (c) 2011-2012 Pawel Jakub Dawidek <pawel@dawidek.net>.
  29  * All rights reserved.
  30  * Copyright (c) 2012 Martin Matuska <mm@FreeBSD.org>. All rights reserved.
  31  * Copyright (c) 2013 Steven Hartland.  All rights reserved.
  32  */
  33
  34 #include <assert.h>
  35 #include <ctype.h>
  36 #include <errno.h>
  37 #include <libgen.h>
  38 #include <libintl.h>
  39 #include <libuutil.h>
  40 #include <libnvpair.h>
  41 #include <locale.h>
  42 #include <stddef.h>
  43 #include <stdio.h>
  44 #include <stdlib.h>
  45 #include <strings.h>
  46 #include <unistd.h>
  47 #include <fcntl.h>
  48 #include <zone.h>
  49 #include <grp.h>
  50 #include <pwd.h>
  51 #include <signal.h>
  52 #include <sys/list.h>
  53 #include <sys/mntent.h>
  54 #include <sys/mnttab.h>
  55 #include <sys/mount.h>
  56 #include <sys/stat.h>
  57 #include <sys/fs/zfs.h>
  58 #include <sys/types.h>
  59 #include <time.h>
  60 #include <err.h>
  61 #include <jail.h>
  62
  63 #include <libzfs.h>
  64 #include <libzfs_core.h>
  65 #include <zfs_prop.h>
  66 #include <zfs_deleg.h>
  67 #include <libuutil.h>
  68 #ifdef sun
  69 #include <aclutils.h>
  70 #include <directory.h>
  71 #endif
  72
  73 #include "zfs_iter.h"
  74 #include "zfs_util.h"
  75 #include "zfs_comutil.h"
  76
  77 libzfs_handle_t *g_zfs;
  78
  79 static FILE *mnttab_file;
  80 static char history_str[HIS_MAX_RECORD_LEN];
  81 static boolean_t log_history = B_TRUE;
  82
  83 static int zfs_do_clone(int argc, char **argv);
  84 static int zfs_do_create(int argc, char **argv);
  85 static int zfs_do_destroy(int argc, char **argv);
  86 static int zfs_do_get(int argc, char **argv);
  87 static int zfs_do_inherit(int argc, char **argv);
  88 static int zfs_do_list(int argc, char **argv);
  89 static int zfs_do_mount(int argc, char **argv);
  90 static int zfs_do_rename(int argc, char **argv);
  91 static int zfs_do_rollback(int argc, char **argv);
  92 static int zfs_do_set(int argc, char **argv);
  93 static int zfs_do_upgrade(int argc, char **argv);
  94 static int zfs_do_snapshot(int argc, char **argv);
  95 static int zfs_do_unmount(int argc, char **argv);
  96 static int zfs_do_share(int argc, char **argv);
  97 static int zfs_do_unshare(int argc, char **argv);
  98 static int zfs_do_send(int argc, char **argv);
  99 static int zfs_do_receive(int argc, char **argv);
 100 static int zfs_do_promote(int argc, char **argv);
 101 static int zfs_do_userspace(int argc, char **argv);
 102 static int zfs_do_allow(int argc, char **argv);
 103 static int zfs_do_unallow(int argc, char **argv);
 104 static int zfs_do_hold(int argc, char **argv);
 105 static int zfs_do_holds(int argc, char **argv);
 106 static int zfs_do_release(int argc, char **argv);
 107 static int zfs_do_diff(int argc, char **argv);
 108 static int zfs_do_jail(int argc, char **argv);
 109 static int zfs_do_unjail(int argc, char **argv);
 110
 111 /*
 112  * Enable a reasonable set of defaults for libumem debugging on DEBUG builds.
 113  */
 114
 115 #ifdef DEBUG
 116 const char *
 117 _umem_debug_init(void)
 118 {
 119         return ("default,verbose"); /* $UMEM_DEBUG setting */
 120 }
 121
 122 const char *
 123 _umem_logging_init(void)
 124 {
 125         return ("fail,contents"); /* $UMEM_LOGGING setting */
 126 }
 127 #endif
 128
 129 typedef enum {
 130         HELP_CLONE,
 131         HELP_CREATE,
 132         HELP_DESTROY,
 133         HELP_GET,
 134         HELP_INHERIT,
 135         HELP_UPGRADE,
 136         HELP_JAIL,
 137         HELP_UNJAIL,
 138         HELP_LIST,
 139         HELP_MOUNT,
 140         HELP_PROMOTE,
 141         HELP_RECEIVE,
 142         HELP_RENAME,
 143         HELP_ROLLBACK,
 144         HELP_SEND,
 145         HELP_SET,
 146         HELP_SHARE,
 147         HELP_SNAPSHOT,
 148         HELP_UNMOUNT,
 149         HELP_UNSHARE,
 150         HELP_ALLOW,
 151         HELP_UNALLOW,
 152         HELP_USERSPACE,
 153         HELP_GROUPSPACE,
 154         HELP_HOLD,
 155         HELP_HOLDS,
 156         HELP_RELEASE,
 157         HELP_DIFF,
 158 } zfs_help_t;
 159
 160 typedef struct zfs_command {
 161         const char      *name;
 162         int             (*func)(int argc, char **argv);
 163         zfs_help_t      usage;
 164 } zfs_command_t;
 165
 166 /*
 167  * Master command table.  Each ZFS command has a name, associated function, and
 168  * usage message.  The usage messages need to be internationalized, so we have
 169  * to have a function to return the usage message based on a command index.
 170  *
 171  * These commands are organized according to how they are displayed in the usage
 172  * message.  An empty command (one with a NULL name) indicates an empty line in
 173  * the generic usage message.
 174  */
 175 static zfs_command_t command_table[] = {
 176         { "create",     zfs_do_create,          HELP_CREATE             },
 177         { "destroy",    zfs_do_destroy,         HELP_DESTROY            },
 178         { NULL },
 179         { "snapshot",   zfs_do_snapshot,        HELP_SNAPSHOT           },
 180         { "rollback",   zfs_do_rollback,        HELP_ROLLBACK           },
 181         { "clone",      zfs_do_clone,           HELP_CLONE              },
 182         { "promote",    zfs_do_promote,         HELP_PROMOTE            },
 183         { "rename",     zfs_do_rename,          HELP_RENAME             },
 184         { NULL },
 185         { "list",       zfs_do_list,            HELP_LIST               },
 186         { NULL },
 187         { "set",        zfs_do_set,             HELP_SET                },
 188         { "get",        zfs_do_get,             HELP_GET                },
 189         { "inherit",    zfs_do_inherit,         HELP_INHERIT            },
 190         { "upgrade",    zfs_do_upgrade,         HELP_UPGRADE            },
 191         { "userspace",  zfs_do_userspace,       HELP_USERSPACE          },
 192         { "groupspace", zfs_do_userspace,       HELP_GROUPSPACE         },
 193         { NULL },
 194         { "mount",      zfs_do_mount,           HELP_MOUNT              },
 195         { "unmount",    zfs_do_unmount,         HELP_UNMOUNT            },
 196         { "share",      zfs_do_share,           HELP_SHARE              },
 197         { "unshare",    zfs_do_unshare,         HELP_UNSHARE            },
 198         { NULL },
 199         { "send",       zfs_do_send,            HELP_SEND               },
 200         { "receive",    zfs_do_receive,         HELP_RECEIVE            },
 201         { NULL },
 202         { "allow",      zfs_do_allow,           HELP_ALLOW              },
 203         { NULL },
 204         { "unallow",    zfs_do_unallow,         HELP_UNALLOW            },
 205         { NULL },
 206         { "hold",       zfs_do_hold,            HELP_HOLD               },
 207         { "holds",      zfs_do_holds,           HELP_HOLDS              },
 208         { "release",    zfs_do_release,         HELP_RELEASE            },
 209         { "diff",       zfs_do_diff,            HELP_DIFF               },
 210         { NULL },
 211         { "jail",       zfs_do_jail,            HELP_JAIL               },
 212         { "unjail",     zfs_do_unjail,          HELP_UNJAIL             },
 213 };
 214
 215 #define NCOMMAND        (sizeof (command_table) / sizeof (command_table[0]))
 216
 217 zfs_command_t *current_command;
 218
 219 static const char *
 220 get_usage(zfs_help_t idx)
 221 {
 222         switch (idx) {
 223         case HELP_CLONE:
 224                 return (gettext("\tclone [-p] [-o property=value] ... "
 225                     "<snapshot> <filesystem|volume>\n"));
 226         case HELP_CREATE:
 227                 return (gettext("\tcreate [-pu] [-o property=value] ... "
 228                     "<filesystem>\n"
 229                     "\tcreate [-ps] [-b blocksize] [-o property=value] ... "
 230                     "-V <size> <volume>\n"));
 231         case HELP_DESTROY:
 232                 return (gettext("\tdestroy [-fnpRrv] <filesystem|volume>\n"
 233                     "\tdestroy [-dnpRrv] "
 234                     "<snapshot>[%<snapname>][,...]\n"));
 235         case HELP_GET:
 236                 return (gettext("\tget [-rHp] [-d max] "
 237                     "[-o \"all\" | field[,...]] [-t type[,...]] "
 238                     "[-s source[,...]]\n"
 239                     "\t    <\"all\" | property[,...]> "
 240                     "[filesystem|volume|snapshot] ...\n"));
 241         case HELP_INHERIT:
 242                 return (gettext("\tinherit [-rS] <property> "
 243                     "<filesystem|volume|snapshot> ...\n"));
 244         case HELP_UPGRADE:
 245                 return (gettext("\tupgrade [-v]\n"
 246                     "\tupgrade [-r] [-V version] <-a | filesystem ...>\n"));
 247         case HELP_JAIL:
 248                 return (gettext("\tjail <jailid|jailname> <filesystem>\n"));
 249         case HELP_UNJAIL:
 250                 return (gettext("\tunjail <jailid|jailname> <filesystem>\n"));
 251         case HELP_LIST:
 252                 return (gettext("\tlist [-rH][-d max] "
 253                     "[-o property[,...]] [-t type[,...]] [-s property] ...\n"
 254                     "\t    [-S property] ... "
 255                     "[filesystem|volume|snapshot] ...\n"));
 256         case HELP_MOUNT:
 257                 return (gettext("\tmount\n"
 258                     "\tmount [-vO] [-o opts] <-a | filesystem>\n"));
 259         case HELP_PROMOTE:
 260                 return (gettext("\tpromote <clone-filesystem>\n"));
 261         case HELP_RECEIVE:
 262                 return (gettext("\treceive|recv [-vnFu] <filesystem|volume|"
 263                 "snapshot>\n"
 264                 "\treceive|recv [-vnFu] [-d | -e] <filesystem>\n"));
 265         case HELP_RENAME:
 266                 return (gettext("\trename [-f] <filesystem|volume|snapshot> "
 267                     "<filesystem|volume|snapshot>\n"
 268                     "\trename [-f] -p <filesystem|volume> "
 269                     "<filesystem|volume>\n"
 270                     "\trename -r <snapshot> <snapshot>\n"
 271                     "\trename -u [-p] <filesystem> <filesystem>"));
 272         case HELP_ROLLBACK:
 273                 return (gettext("\trollback [-rRf] <snapshot>\n"));
 274         case HELP_SEND:
 275                 return (gettext("\tsend [-DnPpRv] "
 276                     "[-i snapshot | -I snapshot] <snapshot>\n"));
 277         case HELP_SET:
 278                 return (gettext("\tset <property=value> "
 279                     "<filesystem|volume|snapshot> ...\n"));
 280         case HELP_SHARE:
 281                 return (gettext("\tshare <-a | filesystem>\n"));
 282         case HELP_SNAPSHOT:
 283                 return (gettext("\tsnapshot|snap [-r] [-o property=value] ... "
 284                     "<filesystem@snapname|volume@snapname> ...\n"));
 285         case HELP_UNMOUNT:
 286                 return (gettext("\tunmount|umount [-f] "
 287                     "<-a | filesystem|mountpoint>\n"));
 288         case HELP_UNSHARE:
 289                 return (gettext("\tunshare "
 290                     "<-a | filesystem|mountpoint>\n"));
 291         case HELP_ALLOW:
 292                 return (gettext("\tallow <filesystem|volume>\n"
 293                     "\tallow [-ldug] "
 294                     "<\"everyone\"|user|group>[,...] <perm|@setname>[,...]\n"
 295                     "\t    <filesystem|volume>\n"
 296                     "\tallow [-ld] -e <perm|@setname>[,...] "
 297                     "<filesystem|volume>\n"
 298                     "\tallow -c <perm|@setname>[,...] <filesystem|volume>\n"
 299                     "\tallow -s @setname <perm|@setname>[,...] "
 300                     "<filesystem|volume>\n"));
 301         case HELP_UNALLOW:
 302                 return (gettext("\tunallow [-rldug] "
 303                     "<\"everyone\"|user|group>[,...]\n"
 304                     "\t    [<perm|@setname>[,...]] <filesystem|volume>\n"
 305                     "\tunallow [-rld] -e [<perm|@setname>[,...]] "
 306                     "<filesystem|volume>\n"
 307                     "\tunallow [-r] -c [<perm|@setname>[,...]] "
 308                     "<filesystem|volume>\n"
 309                     "\tunallow [-r] -s @setname [<perm|@setname>[,...]] "
 310                     "<filesystem|volume>\n"));
 311         case HELP_USERSPACE:
 312                 return (gettext("\tuserspace [-Hinp] [-o field[,...]] "
 313                     "[-s field] ...\n\t[-S field] ... "
 314                     "[-t type[,...]] <filesystem|snapshot>\n"));
 315         case HELP_GROUPSPACE:
 316                 return (gettext("\tgroupspace [-Hinp] [-o field[,...]] "
 317                     "[-s field] ...\n\t[-S field] ... "
 318                     "[-t type[,...]] <filesystem|snapshot>\n"));
 319         case HELP_HOLD:
 320                 return (gettext("\thold [-r] <tag> <snapshot> ...\n"));
 321         case HELP_HOLDS:
 322                 return (gettext("\tholds [-r] <snapshot> ...\n"));
 323         case HELP_RELEASE:
 324                 return (gettext("\trelease [-r] <tag> <snapshot> ...\n"));
 325         case HELP_DIFF:
 326                 return (gettext("\tdiff [-FHt] <snapshot> "
 327                     "[snapshot|filesystem]\n"));
 328         }
 329
 330         abort();
 331         /* NOTREACHED */
 332 }
 333
 334 void
 335 nomem(void)
 336 {
 337         (void) fprintf(stderr, gettext("internal error: out of memory\n"));
 338         exit(1);
 339 }
 340
 341 /*
 342  * Utility function to guarantee malloc() success.
 343  */
 344
 345 void *
 346 safe_malloc(size_t size)
 347 {
 348         void *data;
 349
 350         if ((data = calloc(1, size)) == NULL)
 351                 nomem();
 352
 353         return (data);
 354 }
 355
 356 static char *
 357 safe_strdup(char *str)
 358 {
 359         char *dupstr = strdup(str);
 360
 361         if (dupstr == NULL)
 362                 nomem();
 363
 364         return (dupstr);
 365 }
 366
 367 /*
 368  * Callback routine that will print out information for each of
 369  * the properties.
 370  */
 371 static int
 372 usage_prop_cb(int prop, void *cb)
 373 {
 374         FILE *fp = cb;
 375
 376         (void) fprintf(fp, "\t%-15s ", zfs_prop_to_name(prop));
 377
 378         if (zfs_prop_readonly(prop))
 379                 (void) fprintf(fp, " NO    ");
 380         else
 381                 (void) fprintf(fp, "YES    ");
 382
 383         if (zfs_prop_inheritable(prop))
 384                 (void) fprintf(fp, "  YES   ");
 385         else
 386                 (void) fprintf(fp, "   NO   ");
 387
 388         if (zfs_prop_values(prop) == NULL)
 389                 (void) fprintf(fp, "-\n");
 390         else
 391                 (void) fprintf(fp, "%s\n", zfs_prop_values(prop));
 392
 393         return (ZPROP_CONT);
 394 }
 395
 396 /*
 397  * Display usage message.  If we're inside a command, display only the usage for
 398  * that command.  Otherwise, iterate over the entire command table and display
 399  * a complete usage message.
 400  */
 401 static void
 402 usage(boolean_t requested)
 403 {
 404         int i;
 405         boolean_t show_properties = B_FALSE;
 406         FILE *fp = requested ? stdout : stderr;
 407
 408         if (current_command == NULL) {
 409
 410                 (void) fprintf(fp, gettext("usage: zfs command args ...\n"));
 411                 (void) fprintf(fp,
 412                     gettext("where 'command' is one of the following:\n\n"));
 413
 414                 for (i = 0; i < NCOMMAND; i++) {
 415                         if (command_table[i].name == NULL)
 416                                 (void) fprintf(fp, "\n");
 417                         else
 418                                 (void) fprintf(fp, "%s",
 419                                     get_usage(command_table[i].usage));
 420                 }
 421
 422                 (void) fprintf(fp, gettext("\nEach dataset is of the form: "
 423                     "pool/[dataset/]*dataset[@name]\n"));
 424         } else {
 425                 (void) fprintf(fp, gettext("usage:\n"));
 426                 (void) fprintf(fp, "%s", get_usage(current_command->usage));
 427         }
 428
 429         if (current_command != NULL &&
 430             (strcmp(current_command->name, "set") == 0 ||
 431             strcmp(current_command->name, "get") == 0 ||
 432             strcmp(current_command->name, "inherit") == 0 ||
 433             strcmp(current_command->name, "list") == 0))
 434                 show_properties = B_TRUE;
 435
 436         if (show_properties) {
 437                 (void) fprintf(fp,
 438                     gettext("\nThe following properties are supported:\n"));
 439
 440                 (void) fprintf(fp, "\n\t%-14s %s  %s   %s\n\n",
 441                     "PROPERTY", "EDIT", "INHERIT", "VALUES");
 442
 443                 /* Iterate over all properties */
 444                 (void) zprop_iter(usage_prop_cb, fp, B_FALSE, B_TRUE,
 445                     ZFS_TYPE_DATASET);
 446
 447                 (void) fprintf(fp, "\t%-15s ", "userused@...");
 448                 (void) fprintf(fp, " NO       NO   <size>\n");
 449                 (void) fprintf(fp, "\t%-15s ", "groupused@...");
 450                 (void) fprintf(fp, " NO       NO   <size>\n");
 451                 (void) fprintf(fp, "\t%-15s ", "userquota@...");
 452                 (void) fprintf(fp, "YES       NO   <size> | none\n");
 453                 (void) fprintf(fp, "\t%-15s ", "groupquota@...");
 454                 (void) fprintf(fp, "YES       NO   <size> | none\n");
 455                 (void) fprintf(fp, "\t%-15s ", "written@<snap>");
 456                 (void) fprintf(fp, " NO       NO   <size>\n");
 457
 458                 (void) fprintf(fp, gettext("\nSizes are specified in bytes "
 459                     "with standard units such as K, M, G, etc.\n"));
 460                 (void) fprintf(fp, gettext("\nUser-defined properties can "
 461                     "be specified by using a name containing a colon (:).\n"));
 462                 (void) fprintf(fp, gettext("\nThe {user|group}{used|quota}@ "
 463                     "properties must be appended with\n"
 464                     "a user or group specifier of one of these forms:\n"
 465                     "    POSIX name      (eg: \"matt\")\n"
 466                     "    POSIX id        (eg: \"126829\")\n"
 467                     "    SMB name@domain (eg: \"matt@sun\")\n"
 468                     "    SMB SID         (eg: \"S-1-234-567-89\")\n"));
 469         } else {
 470                 (void) fprintf(fp,
 471                     gettext("\nFor the property list, run: %s\n"),
 472                     "zfs set|get");
 473                 (void) fprintf(fp,
 474                     gettext("\nFor the delegated permission list, run: %s\n"),
 475                     "zfs allow|unallow");
 476         }
 477
 478         /*
 479          * See comments at end of main().
 480          */
 481         if (getenv("ZFS_ABORT") != NULL) {
 482                 (void) printf("dumping core by request\n");
 483                 abort();
 484         }
 485
 486         exit(requested ? 0 : 2);
 487 }
 488
 489 static int
 490 parseprop(nvlist_t *props)
 491 {
 492         char *propname = optarg;
 493         char *propval, *strval;
 494
 495         if ((propval = strchr(propname, '=')) == NULL) {
 496                 (void) fprintf(stderr, gettext("missing "
 497                     "'=' for -o option\n"));
 498                 return (-1);
 499         }
 500         *propval = '\0';
 501         propval++;
 502         if (nvlist_lookup_string(props, propname, &strval) == 0) {
 503                 (void) fprintf(stderr, gettext("property '%s' "
 504                     "specified multiple times\n"), propname);
 505                 return (-1);
 506         }
 507         if (nvlist_add_string(props, propname, propval) != 0)
 508                 nomem();
 509         return (0);
 510 }
 511
 512 static int
 513 parse_depth(char *opt, int *flags)
 514 {
 515         char *tmp;
 516         int depth;
 517
 518         depth = (int)strtol(opt, &tmp, 0);
 519         if (*tmp) {
 520                 (void) fprintf(stderr,
 521                     gettext("%s is not an integer\n"), optarg);
 522                 usage(B_FALSE);
 523         }
 524         if (depth < 0) {
 525                 (void) fprintf(stderr,
 526                     gettext("Depth can not be negative.\n"));
 527                 usage(B_FALSE);
 528         }
 529         *flags |= (ZFS_ITER_DEPTH_LIMIT|ZFS_ITER_RECURSE);
 530         return (depth);
 531 }
 532
 533 #define PROGRESS_DELAY 2                /* seconds */
 534
 535 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";
 536 static time_t pt_begin;
 537 static char *pt_header = NULL;
 538 static boolean_t pt_shown;
 539
 540 static void
 541 start_progress_timer(void)
 542 {
 543         pt_begin = time(NULL) + PROGRESS_DELAY;
 544         pt_shown = B_FALSE;
 545 }
 546
 547 static void
 548 set_progress_header(char *header)
 549 {
 550         assert(pt_header == NULL);
 551         pt_header = safe_strdup(header);
 552         if (pt_shown) {
 553                 (void) printf("%s: ", header);
 554                 (void) fflush(stdout);
 555         }
 556 }
 557
 558 static void
 559 update_progress(char *update)
 560 {
 561         if (!pt_shown && time(NULL) > pt_begin) {
 562                 int len = strlen(update);
 563
 564                 (void) printf("%s: %s%*.*s", pt_header, update, len, len,
 565                     pt_reverse);
 566                 (void) fflush(stdout);
 567                 pt_shown = B_TRUE;
 568         } else if (pt_shown) {
 569                 int len = strlen(update);
 570
 571                 (void) printf("%s%*.*s", update, len, len, pt_reverse);
 572                 (void) fflush(stdout);
 573         }
 574 }
 575
 576 static void
 577 finish_progress(char *done)
 578 {
 579         if (pt_shown) {
 580                 (void) printf("%s\n", done);
 581                 (void) fflush(stdout);
 582         }
 583         free(pt_header);
 584         pt_header = NULL;
 585 }
 586 /*
 587  * zfs clone [-p] [-o prop=value] ... <snap> <fs | vol>
 588  *
 589  * Given an existing dataset, create a writable copy whose initial contents
 590  * are the same as the source.  The newly created dataset maintains a
 591  * dependency on the original; the original cannot be destroyed so long as
 592  * the clone exists.
 593  *
 594  * The '-p' flag creates all the non-existing ancestors of the target first.
 595  */
 596 static int
 597 zfs_do_clone(int argc, char **argv)
 598 {
 599         zfs_handle_t *zhp = NULL;
 600         boolean_t parents = B_FALSE;
 601         nvlist_t *props;
 602         int ret = 0;
 603         int c;
 604
 605         if (nvlist_alloc(&props, NV_UNIQUE_NAME, 0) != 0)
 606                 nomem();
 607
 608         /* check options */
 609         while ((c = getopt(argc, argv, "o:p")) != -1) {
 610                 switch (c) {
 611                 case 'o':
 612                         if (parseprop(props))
 613                                 return (1);
 614                         break;
 615                 case 'p':
 616                         parents = B_TRUE;
 617                         break;
 618                 case '?':
 619                         (void) fprintf(stderr, gettext("invalid option '%c'\n"),
 620                             optopt);
 621                         goto usage;
 622                 }
 623         }
 624
 625         argc -= optind;
 626         argv += optind;
 627
 628         /* check number of arguments */
 629         if (argc < 1) {
 630                 (void) fprintf(stderr, gettext("missing source dataset "
 631                     "argument\n"));
 632                 goto usage;
 633         }
 634         if (argc < 2) {
 635                 (void) fprintf(stderr, gettext("missing target dataset "
 636                     "argument\n"));
 637                 goto usage;
 638         }
 639         if (argc > 2) {
 640                 (void) fprintf(stderr, gettext("too many arguments\n"));
 641                 goto usage;
 642         }
 643
 644         /* open the source dataset */
 645         if ((zhp = zfs_open(g_zfs, argv[0], ZFS_TYPE_SNAPSHOT)) == NULL)
 646                 return (1);
 647
 648         if (parents && zfs_name_valid(argv[1], ZFS_TYPE_FILESYSTEM |
 649             ZFS_TYPE_VOLUME)) {
 650                 /*
 651                  * Now create the ancestors of the target dataset.  If the
 652                  * target already exists and '-p' option was used we should not
 653                  * complain.
 654                  */
 655                 if (zfs_dataset_exists(g_zfs, argv[1], ZFS_TYPE_FILESYSTEM |
 656                     ZFS_TYPE_VOLUME))
 657                         return (0);
 658                 if (zfs_create_ancestors(g_zfs, argv[1]) != 0)
 659                         return (1);
 660         }
 661
 662         /* pass to libzfs */
 663         ret = zfs_clone(zhp, argv[1], props);
 664
 665         /* create the mountpoint if necessary */
 666         if (ret == 0) {
 667                 zfs_handle_t *clone;
 668
 669                 clone = zfs_open(g_zfs, argv[1], ZFS_TYPE_DATASET);
 670                 if (clone != NULL) {
 671                         if (zfs_get_type(clone) != ZFS_TYPE_VOLUME)
 672                                 if ((ret = zfs_mount(clone, NULL, 0)) == 0)
 673                                         ret = zfs_share(clone);
 674                         zfs_close(clone);
 675                 }
 676         }
 677
 678         zfs_close(zhp);
 679         nvlist_free(props);
 680
 681         return (!!ret);
 682
 683 usage:
 684         if (zhp)
 685                 zfs_close(zhp);
 686         nvlist_free(props);
 687         usage(B_FALSE);
 688         return (-1);
 689 }
 690
 691 /*
 692  * zfs create [-pu] [-o prop=value] ... fs
 693  * zfs create [-ps] [-b blocksize] [-o prop=value] ... -V vol size
 694  *
 695  * Create a new dataset.  This command can be used to create filesystems
 696  * and volumes.  Snapshot creation is handled by 'zfs snapshot'.
 697  * For volumes, the user must specify a size to be used.
 698  *
 699  * The '-s' flag applies only to volumes, and indicates that we should not try
 700  * to set the reservation for this volume.  By default we set a reservation
 701  * equal to the size for any volume.  For pools with SPA_VERSION >=
 702  * SPA_VERSION_REFRESERVATION, we set a refreservation instead.
 703  *
 704  * The '-p' flag creates all the non-existing ancestors of the target first.
 705  *
 706  * The '-u' flag prevents mounting of newly created file system.
 707  */
 708 static int
 709 zfs_do_create(int argc, char **argv)
 710 {
 711         zfs_type_t type = ZFS_TYPE_FILESYSTEM;
 712         zfs_handle_t *zhp = NULL;
 713         uint64_t volsize;
 714         int c;
 715         boolean_t noreserve = B_FALSE;
 716         boolean_t bflag = B_FALSE;
 717         boolean_t parents = B_FALSE;
 718         boolean_t nomount = B_FALSE;
 719         int ret = 1;
 720         nvlist_t *props;
 721         uint64_t intval;
 722         int canmount = ZFS_CANMOUNT_OFF;
 723
 724         if (nvlist_alloc(&props, NV_UNIQUE_NAME, 0) != 0)
 725                 nomem();
 726
 727         /* check options */
 728         while ((c = getopt(argc, argv, ":V:b:so:pu")) != -1) {
 729                 switch (c) {
 730                 case 'V':
 731                         type = ZFS_TYPE_VOLUME;
 732                         if (zfs_nicestrtonum(g_zfs, optarg, &intval) != 0) {
 733                                 (void) fprintf(stderr, gettext("bad volume "
 734                                     "size '%s': %s\n"), optarg,
 735                                     libzfs_error_description(g_zfs));
 736                                 goto error;
 737                         }
 738
 739                         if (nvlist_add_uint64(props,
 740                             zfs_prop_to_name(ZFS_PROP_VOLSIZE), intval) != 0)
 741                                 nomem();
 742                         volsize = intval;
 743                         break;
 744                 case 'p':
 745                         parents = B_TRUE;
 746                         break;
 747                 case 'b':
 748                         bflag = B_TRUE;
 749                         if (zfs_nicestrtonum(g_zfs, optarg, &intval) != 0) {
 750                                 (void) fprintf(stderr, gettext("bad volume "
 751                                     "block size '%s': %s\n"), optarg,
 752                                     libzfs_error_description(g_zfs));
 753                                 goto error;
 754                         }
 755
 756                         if (nvlist_add_uint64(props,
 757                             zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE),
 758                             intval) != 0)
 759                                 nomem();
 760                         break;
 761                 case 'o':
 762                         if (parseprop(props))
 763                                 goto error;
 764                         break;
 765                 case 's':
 766                         noreserve = B_TRUE;
 767                         break;
 768                 case 'u':
 769                         nomount = B_TRUE;
 770                         break;
 771                 case ':':
 772                         (void) fprintf(stderr, gettext("missing size "
 773                             "argument\n"));
 774                         goto badusage;
 775                 case '?':
 776                         (void) fprintf(stderr, gettext("invalid option '%c'\n"),
 777                             optopt);
 778                         goto badusage;
 779                 }
 780         }
 781
 782         if ((bflag || noreserve) && type != ZFS_TYPE_VOLUME) {
 783                 (void) fprintf(stderr, gettext("'-s' and '-b' can only be "
 784                     "used when creating a volume\n"));
 785                 goto badusage;
 786         }
 787         if (nomount && type != ZFS_TYPE_FILESYSTEM) {
 788                 (void) fprintf(stderr, gettext("'-u' can only be "
 789                     "used when creating a file system\n"));
 790                 goto badusage;
 791         }
 792
 793         argc -= optind;
 794         argv += optind;
 795
 796         /* check number of arguments */
 797         if (argc == 0) {
 798                 (void) fprintf(stderr, gettext("missing %s argument\n"),
 799                     zfs_type_to_name(type));
 800                 goto badusage;
 801         }
 802         if (argc > 1) {
 803                 (void) fprintf(stderr, gettext("too many arguments\n"));
 804                 goto badusage;
 805         }
 806
 807         if (type == ZFS_TYPE_VOLUME && !noreserve) {
 808                 zpool_handle_t *zpool_handle;
 809                 uint64_t spa_version;
 810                 char *p;
 811                 zfs_prop_t resv_prop;
 812                 char *strval;
 813
 814                 if (p = strchr(argv[0], '/'))
 815                         *p = '\0';
 816                 zpool_handle = zpool_open(g_zfs, argv[0]);
 817                 if (p != NULL)
 818                         *p = '/';
 819                 if (zpool_handle == NULL)
 820                         goto error;
 821                 spa_version = zpool_get_prop_int(zpool_handle,
 822                     ZPOOL_PROP_VERSION, NULL);
 823                 zpool_close(zpool_handle);
 824                 if (spa_version >= SPA_VERSION_REFRESERVATION)
 825                         resv_prop = ZFS_PROP_REFRESERVATION;
 826                 else
 827                         resv_prop = ZFS_PROP_RESERVATION;
 828                 volsize = zvol_volsize_to_reservation(volsize, props);
 829
 830                 if (nvlist_lookup_string(props, zfs_prop_to_name(resv_prop),
 831                     &strval) != 0) {
 832                         if (nvlist_add_uint64(props,
 833                             zfs_prop_to_name(resv_prop), volsize) != 0) {
 834                                 nvlist_free(props);
 835                                 nomem();
 836                         }
 837                 }
 838         }
 839
 840         if (parents && zfs_name_valid(argv[0], type)) {
 841                 /*
 842                  * Now create the ancestors of target dataset.  If the target
 843                  * already exists and '-p' option was used we should not
 844                  * complain.
 845                  */
 846                 if (zfs_dataset_exists(g_zfs, argv[0], type)) {
 847                         ret = 0;
 848                         goto error;
 849                 }
 850                 if (zfs_create_ancestors(g_zfs, argv[0]) != 0)
 851                         goto error;
 852         }
 853
 854         /* pass to libzfs */
 855         if (zfs_create(g_zfs, argv[0], type, props) != 0)
 856                 goto error;
 857
 858         if ((zhp = zfs_open(g_zfs, argv[0], ZFS_TYPE_DATASET)) == NULL)
 859                 goto error;
 860
 861         ret = 0;
 862         /*
 863          * if the user doesn't want the dataset automatically mounted,
 864          * then skip the mount/share step
 865          */
 866         if (zfs_prop_valid_for_type(ZFS_PROP_CANMOUNT, type))
 867                 canmount = zfs_prop_get_int(zhp, ZFS_PROP_CANMOUNT);
 868
 869         /*
 870          * Mount and/or share the new filesystem as appropriate.  We provide a
 871          * verbose error message to let the user know that their filesystem was
 872          * in fact created, even if we failed to mount or share it.
 873          */
 874         if (!nomount && canmount == ZFS_CANMOUNT_ON) {
 875                 if (zfs_mount(zhp, NULL, 0) != 0) {
 876                         (void) fprintf(stderr, gettext("filesystem "
 877                             "successfully created, but not mounted\n"));
 878                         ret = 1;
 879                 } else if (zfs_share(zhp) != 0) {
 880                         (void) fprintf(stderr, gettext("filesystem "
 881                             "successfully created, but not shared\n"));
 882                         ret = 1;
 883                 }
 884         }
 885
 886 error:
 887         if (zhp)
 888                 zfs_close(zhp);
 889         nvlist_free(props);
 890         return (ret);
 891 badusage:
 892         nvlist_free(props);
 893         usage(B_FALSE);
 894         return (2);
 895 }
 896
 897 /*
 898  * zfs destroy [-rRf] <fs, vol>
 899  * zfs destroy [-rRd] <snap>
 900  *
 901  *      -r      Recursively destroy all children
 902  *      -R      Recursively destroy all dependents, including clones
 903  *      -f      Force unmounting of any dependents
 904  *      -d      If we can't destroy now, mark for deferred destruction
 905  *
 906  * Destroys the given dataset.  By default, it will unmount any filesystems,
 907  * and refuse to destroy a dataset that has any dependents.  A dependent can
 908  * either be a child, or a clone of a child.
 909  */
 910 typedef struct destroy_cbdata {
 911         boolean_t       cb_first;
 912         boolean_t       cb_force;
 913         boolean_t       cb_recurse;
 914         boolean_t       cb_error;
 915         boolean_t       cb_doclones;
 916         zfs_handle_t    *cb_target;
 917         boolean_t       cb_defer_destroy;
 918         boolean_t       cb_verbose;
 919         boolean_t       cb_parsable;
 920         boolean_t       cb_dryrun;
 921         nvlist_t        *cb_nvl;
 922         nvlist_t        *cb_batchedsnaps;
 923
 924         /* first snap in contiguous run */
 925         char            *cb_firstsnap;
 926         /* previous snap in contiguous run */
 927         char            *cb_prevsnap;
 928         int64_t         cb_snapused;
 929         char            *cb_snapspec;
 930 } destroy_cbdata_t;
 931
 932 /*
 933  * Check for any dependents based on the '-r' or '-R' flags.
 934  */
 935 static int
 936 destroy_check_dependent(zfs_handle_t *zhp, void *data)
 937 {
 938         destroy_cbdata_t *cbp = data;
 939         const char *tname = zfs_get_name(cbp->cb_target);
 940         const char *name = zfs_get_name(zhp);
 941
 942         if (strncmp(tname, name, strlen(tname)) == 0 &&
 943             (name[strlen(tname)] == '/' || name[strlen(tname)] == '@')) {
 944                 /*
 945                  * This is a direct descendant, not a clone somewhere else in
 946                  * the hierarchy.
 947                  */
 948                 if (cbp->cb_recurse)
 949                         goto out;
 950
 951                 if (cbp->cb_first) {
 952                         (void) fprintf(stderr, gettext("cannot destroy '%s': "
 953                             "%s has children\n"),
 954                             zfs_get_name(cbp->cb_target),
 955                             zfs_type_to_name(zfs_get_type(cbp->cb_target)));
 956                         (void) fprintf(stderr, gettext("use '-r' to destroy "
 957                             "the following datasets:\n"));
 958                         cbp->cb_first = B_FALSE;
 959                         cbp->cb_error = B_TRUE;
 960                 }
 961
 962                 (void) fprintf(stderr, "%s\n", zfs_get_name(zhp));
 963         } else {
 964                 /*
 965                  * This is a clone.  We only want to report this if the '-r'
 966                  * wasn't specified, or the target is a snapshot.
 967                  */
 968                 if (!cbp->cb_recurse &&
 969                     zfs_get_type(cbp->cb_target) != ZFS_TYPE_SNAPSHOT)
 970                         goto out;
 971
 972                 if (cbp->cb_first) {
 973                         (void) fprintf(stderr, gettext("cannot destroy '%s': "
 974                             "%s has dependent clones\n"),
 975                             zfs_get_name(cbp->cb_target),
 976                             zfs_type_to_name(zfs_get_type(cbp->cb_target)));
 977                         (void) fprintf(stderr, gettext("use '-R' to destroy "
 978                             "the following datasets:\n"));
 979                         cbp->cb_first = B_FALSE;
 980                         cbp->cb_error = B_TRUE;
 981                         cbp->cb_dryrun = B_TRUE;
 982                 }
 983
 984                 (void) fprintf(stderr, "%s\n", zfs_get_name(zhp));
 985         }
 986
 987 out:
 988         zfs_close(zhp);
 989         return (0);
 990 }
 991
 992 static int
 993 destroy_callback(zfs_handle_t *zhp, void *data)
 994 {
 995         destroy_cbdata_t *cb = data;
 996         const char *name = zfs_get_name(zhp);
 997
 998         if (cb->cb_verbose) {
 999                 if (cb->cb_parsable) {
1000                         (void) printf("destroy\t%s\n", name);
1001                 } else if (cb->cb_dryrun) {
1002                         (void) printf(gettext("would destroy %s\n"),
1003                             name);
1004                 } else {
1005                         (void) printf(gettext("will destroy %s\n"),
1006                             name);
1007                 }
1008         }
1009
1010         /*
1011          * Ignore pools (which we've already flagged as an error before getting
1012          * here).
1013          */
1014         if (strchr(zfs_get_name(zhp), '/') == NULL &&
1015             zfs_get_type(zhp) == ZFS_TYPE_FILESYSTEM) {
1016                 zfs_close(zhp);
1017                 return (0);
1018         }
1019         if (cb->cb_dryrun) {
1020                 zfs_close(zhp);
1021                 return (0);
1022         }
1023
1024         /*
1025          * We batch up all contiguous snapshots (even of different
1026          * filesystems) and destroy them with one ioctl.  We can't
1027          * simply do all snap deletions and then all fs deletions,
1028          * because we must delete a clone before its origin.
1029          */
1030         if (zfs_get_type(zhp) == ZFS_TYPE_SNAPSHOT) {
1031                 fnvlist_add_boolean(cb->cb_batchedsnaps, name);
1032         } else {
1033                 int error = zfs_destroy_snaps_nvl(g_zfs,
1034                     cb->cb_batchedsnaps, B_FALSE);
1035                 fnvlist_free(cb->cb_batchedsnaps);
1036                 cb->cb_batchedsnaps = fnvlist_alloc();
1037
1038                 if (error != 0 ||
1039                     zfs_unmount(zhp, NULL, cb->cb_force ? MS_FORCE : 0) != 0 ||
1040                     zfs_destroy(zhp, cb->cb_defer_destroy) != 0) {
1041                         zfs_close(zhp);
1042                         return (-1);
1043                 }
1044         }
1045
1046         zfs_close(zhp);
1047         return (0);
1048 }
1049
1050 static int
1051 destroy_print_cb(zfs_handle_t *zhp, void *arg)
1052 {
1053         destroy_cbdata_t *cb = arg;
1054         const char *name = zfs_get_name(zhp);
1055         int err = 0;
1056
1057         if (nvlist_exists(cb->cb_nvl, name)) {
1058                 if (cb->cb_firstsnap == NULL)
1059                         cb->cb_firstsnap = strdup(name);
1060                 if (cb->cb_prevsnap != NULL)
1061                         free(cb->cb_prevsnap);
1062                 /* this snap continues the current range */
1063                 cb->cb_prevsnap = strdup(name);
1064                 if (cb->cb_firstsnap == NULL || cb->cb_prevsnap == NULL)
1065                         nomem();
1066                 if (cb->cb_verbose) {
1067                         if (cb->cb_parsable) {
1068                                 (void) printf("destroy\t%s\n", name);
1069                         } else if (cb->cb_dryrun) {
1070                                 (void) printf(gettext("would destroy %s\n"),
1071                                     name);
1072                         } else {
1073                                 (void) printf(gettext("will destroy %s\n"),
1074                                     name);
1075                         }
1076                 }
1077         } else if (cb->cb_firstsnap != NULL) {
1078                 /* end of this range */
1079                 uint64_t used = 0;
1080                 err = lzc_snaprange_space(cb->cb_firstsnap,
1081                     cb->cb_prevsnap, &used);
1082                 cb->cb_snapused += used;
1083                 free(cb->cb_firstsnap);
1084                 cb->cb_firstsnap = NULL;
1085                 free(cb->cb_prevsnap);
1086                 cb->cb_prevsnap = NULL;
1087         }
1088         zfs_close(zhp);
1089         return (err);
1090 }
1091
1092 static int
1093 destroy_print_snapshots(zfs_handle_t *fs_zhp, destroy_cbdata_t *cb)
1094 {
1095         int err = 0;
1096         assert(cb->cb_firstsnap == NULL);
1097         assert(cb->cb_prevsnap == NULL);
1098         err = zfs_iter_snapshots_sorted(fs_zhp, destroy_print_cb, cb);
1099         if (cb->cb_firstsnap != NULL) {
1100                 uint64_t used = 0;
1101                 if (err == 0) {
1102                         err = lzc_snaprange_space(cb->cb_firstsnap,
1103                             cb->cb_prevsnap, &used);
1104                 }
1105                 cb->cb_snapused += used;
1106                 free(cb->cb_firstsnap);
1107                 cb->cb_firstsnap = NULL;
1108                 free(cb->cb_prevsnap);
1109                 cb->cb_prevsnap = NULL;
1110         }
1111         return (err);
1112 }
1113
1114 static int
1115 snapshot_to_nvl_cb(zfs_handle_t *zhp, void *arg)
1116 {
1117         destroy_cbdata_t *cb = arg;
1118         int err = 0;
1119
1120         /* Check for clones. */
1121         if (!cb->cb_doclones && !cb->cb_defer_destroy) {
1122                 cb->cb_target = zhp;
1123                 cb->cb_first = B_TRUE;
1124                 err = zfs_iter_dependents(zhp, B_TRUE,
1125                     destroy_check_dependent, cb);
1126         }
1127
1128         if (err == 0) {
1129                 if (nvlist_add_boolean(cb->cb_nvl, zfs_get_name(zhp)))
1130                         nomem();
1131         }
1132         zfs_close(zhp);
1133         return (err);
1134 }
1135
1136 static int
1137 gather_snapshots(zfs_handle_t *zhp, void *arg)
1138 {
1139         destroy_cbdata_t *cb = arg;
1140         int err = 0;
1141
1142         err = zfs_iter_snapspec(zhp, cb->cb_snapspec, snapshot_to_nvl_cb, cb);
1143         if (err == ENOENT)
1144                 err = 0;
1145         if (err != 0)
1146                 goto out;
1147
1148         if (cb->cb_verbose) {
1149                 err = destroy_print_snapshots(zhp, cb);
1150                 if (err != 0)
1151                         goto out;
1152         }
1153
1154         if (cb->cb_recurse)
1155                 err = zfs_iter_filesystems(zhp, gather_snapshots, cb);
1156
1157 out:
1158         zfs_close(zhp);
1159         return (err);
1160 }
1161
1162 static int
1163 destroy_clones(destroy_cbdata_t *cb)
1164 {
1165         nvpair_t *pair;
1166         for (pair = nvlist_next_nvpair(cb->cb_nvl, NULL);
1167             pair != NULL;
1168             pair = nvlist_next_nvpair(cb->cb_nvl, pair)) {
1169                 zfs_handle_t *zhp = zfs_open(g_zfs, nvpair_name(pair),
1170                     ZFS_TYPE_SNAPSHOT);
1171                 if (zhp != NULL) {
1172                         boolean_t defer = cb->cb_defer_destroy;
1173                         int err = 0;
1174
1175                         /*
1176                          * We can't defer destroy non-snapshots, so set it to
1177                          * false while destroying the clones.
1178                          */
1179                         cb->cb_defer_destroy = B_FALSE;
1180                         err = zfs_iter_dependents(zhp, B_FALSE,
1181                             destroy_callback, cb);
1182                         cb->cb_defer_destroy = defer;
1183                         zfs_close(zhp);
1184                         if (err != 0)
1185                                 return (err);
1186                 }
1187         }
1188         return (0);
1189 }
1190
1191 static int
1192 zfs_do_destroy(int argc, char **argv)
1193 {
1194         destroy_cbdata_t cb = { 0 };
1195         int rv = 0;
1196         int err = 0;
1197         int c;
1198         zfs_handle_t *zhp = NULL;
1199         char *at;
1200         zfs_type_t type = ZFS_TYPE_DATASET;
1201
1202         /* check options */
1203         while ((c = getopt(argc, argv, "vpndfrR")) != -1) {
1204                 switch (c) {
1205                 case 'v':
1206                         cb.cb_verbose = B_TRUE;
1207                         break;
1208                 case 'p':
1209                         cb.cb_verbose = B_TRUE;
1210                         cb.cb_parsable = B_TRUE;
1211                         break;
1212                 case 'n':
1213                         cb.cb_dryrun = B_TRUE;
1214                         break;
1215                 case 'd':
1216                         cb.cb_defer_destroy = B_TRUE;
1217                         type = ZFS_TYPE_SNAPSHOT;
1218                         break;
1219                 case 'f':
1220                         cb.cb_force = B_TRUE;
1221                         break;
1222                 case 'r':
1223                         cb.cb_recurse = B_TRUE;
1224                         break;
1225                 case 'R':
1226                         cb.cb_recurse = B_TRUE;
1227                         cb.cb_doclones = B_TRUE;
1228                         break;
1229                 case '?':
1230                 default:
1231                         (void) fprintf(stderr, gettext("invalid option '%c'\n"),
1232                             optopt);
1233                         usage(B_FALSE);
1234                 }
1235         }
1236
1237         argc -= optind;
1238         argv += optind;
1239
1240         /* check number of arguments */
1241         if (argc == 0) {
1242                 (void) fprintf(stderr, gettext("missing dataset argument\n"));
1243                 usage(B_FALSE);
1244         }
1245         if (argc > 1) {
1246                 (void) fprintf(stderr, gettext("too many arguments\n"));
1247                 usage(B_FALSE);
1248         }
1249
1250         at = strchr(argv[0], '@');
1251         if (at != NULL) {
1252
1253                 /* Build the list of snaps to destroy in cb_nvl. */
1254                 cb.cb_nvl = fnvlist_alloc();
1255
1256                 *at = '\0';
1257                 zhp = zfs_open(g_zfs, argv[0],
1258                     ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME);
1259                 if (zhp == NULL)
1260                         return (1);
1261
1262                 cb.cb_snapspec = at + 1;
1263                 if (gather_snapshots(zfs_handle_dup(zhp), &cb) != 0 ||
1264                     cb.cb_error) {
1265                         rv = 1;
1266                         goto out;
1267                 }
1268
1269                 if (nvlist_empty(cb.cb_nvl)) {
1270                         (void) fprintf(stderr, gettext("could not find any "
1271                             "snapshots to destroy; check snapshot names.\n"));
1272                         rv = 1;
1273                         goto out;
1274                 }
1275
1276                 if (cb.cb_verbose) {
1277                         char buf[16];
1278                         zfs_nicenum(cb.cb_snapused, buf, sizeof (buf));
1279                         if (cb.cb_parsable) {
1280                                 (void) printf("reclaim\t%llu\n",
1281                                     cb.cb_snapused);
1282                         } else if (cb.cb_dryrun) {
1283                                 (void) printf(gettext("would reclaim %s\n"),
1284                                     buf);
1285                         } else {
1286                                 (void) printf(gettext("will reclaim %s\n"),
1287                                     buf);
1288                         }
1289                 }
1290
1291                 if (!cb.cb_dryrun) {
1292                         if (cb.cb_doclones) {
1293                                 cb.cb_batchedsnaps = fnvlist_alloc();
1294                                 err = destroy_clones(&cb);
1295                                 if (err == 0) {
1296                                         err = zfs_destroy_snaps_nvl(g_zfs,
1297                                             cb.cb_batchedsnaps, B_FALSE);
1298                                 }
1299                                 if (err != 0) {
1300                                         rv = 1;
1301                                         goto out;
1302                                 }
1303                         }
1304                         if (err == 0) {
1305                                 err = zfs_destroy_snaps_nvl(g_zfs, cb.cb_nvl,
1306                                     cb.cb_defer_destroy);
1307                         }
1308                 }
1309
1310                 if (err != 0)
1311                         rv = 1;
1312         } else {
1313                 /* Open the given dataset */
1314                 if ((zhp = zfs_open(g_zfs, argv[0], type)) == NULL)
1315                         return (1);
1316
1317                 cb.cb_target = zhp;
1318
1319                 /*
1320                  * Perform an explicit check for pools before going any further.
1321                  */
1322                 if (!cb.cb_recurse && strchr(zfs_get_name(zhp), '/') == NULL &&
1323                     zfs_get_type(zhp) == ZFS_TYPE_FILESYSTEM) {
1324                         (void) fprintf(stderr, gettext("cannot destroy '%s': "
1325                             "operation does not apply to pools\n"),
1326                             zfs_get_name(zhp));
1327                         (void) fprintf(stderr, gettext("use 'zfs destroy -r "
1328                             "%s' to destroy all datasets in the pool\n"),
1329                             zfs_get_name(zhp));
1330                         (void) fprintf(stderr, gettext("use 'zpool destroy %s' "
1331                             "to destroy the pool itself\n"), zfs_get_name(zhp));
1332                         rv = 1;
1333                         goto out;
1334                 }
1335
1336                 /*
1337                  * Check for any dependents and/or clones.
1338                  */
1339                 cb.cb_first = B_TRUE;
1340                 if (!cb.cb_doclones &&
1341                     zfs_iter_dependents(zhp, B_TRUE, destroy_check_dependent,
1342                     &cb) != 0) {
1343                         rv = 1;
1344                         goto out;
1345                 }
1346
1347                 if (cb.cb_error) {
1348                         rv = 1;
1349                         goto out;
1350                 }
1351
1352                 cb.cb_batchedsnaps = fnvlist_alloc();
1353                 if (zfs_iter_dependents(zhp, B_FALSE, destroy_callback,
1354                     &cb) != 0) {
1355                         rv = 1;
1356                         goto out;
1357                 }
1358
1359                 /*
1360                  * Do the real thing.  The callback will close the
1361                  * handle regardless of whether it succeeds or not.
1362                  */
1363                 err = destroy_callback(zhp, &cb);
1364                 zhp = NULL;
1365                 if (err == 0) {
1366                         err = zfs_destroy_snaps_nvl(g_zfs,
1367                             cb.cb_batchedsnaps, cb.cb_defer_destroy);
1368                 }
1369                 if (err != 0)
1370                         rv = 1;
1371         }
1372
1373 out:
1374         fnvlist_free(cb.cb_batchedsnaps);
1375         fnvlist_free(cb.cb_nvl);
1376         if (zhp != NULL)
1377                 zfs_close(zhp);
1378         return (rv);
1379 }
1380
1381 static boolean_t
1382 is_recvd_column(zprop_get_cbdata_t *cbp)
1383 {
1384         int i;
1385         zfs_get_column_t col;
1386
1387         for (i = 0; i < ZFS_GET_NCOLS &&
1388             (col = cbp->cb_columns[i]) != GET_COL_NONE; i++)
1389                 if (col == GET_COL_RECVD)
1390                         return (B_TRUE);
1391         return (B_FALSE);
1392 }
1393
1394 /*
1395  * zfs get [-rHp] [-o all | field[,field]...] [-s source[,source]...]
1396  *      < all | property[,property]... > < fs | snap | vol > ...
1397  *
1398  *      -r      recurse over any child datasets
1399  *      -H      scripted mode.  Headers are stripped, and fields are separated
1400  *              by tabs instead of spaces.
1401  *      -o      Set of fields to display.  One of "name,property,value,
1402  *              received,source". Default is "name,property,value,source".
1403  *              "all" is an alias for all five.
1404  *      -s      Set of sources to allow.  One of
1405  *              "local,default,inherited,received,temporary,none".  Default is
1406  *              all six.
1407  *      -p      Display values in parsable (literal) format.
1408  *
1409  *  Prints properties for the given datasets.  The user can control which
1410  *  columns to display as well as which property types to allow.
1411  */
1412
1413 /*
1414  * Invoked to display the properties for a single dataset.
1415  */
1416 static int
1417 get_callback(zfs_handle_t *zhp, void *data)
1418 {
1419         char buf[ZFS_MAXPROPLEN];
1420         char rbuf[ZFS_MAXPROPLEN];
1421         zprop_source_t sourcetype;
1422         char source[ZFS_MAXNAMELEN];
1423         zprop_get_cbdata_t *cbp = data;
1424         nvlist_t *user_props = zfs_get_user_props(zhp);
1425         zprop_list_t *pl = cbp->cb_proplist;
1426         nvlist_t *propval;
1427         char *strval;
1428         char *sourceval;
1429         boolean_t received = is_recvd_column(cbp);
1430
1431         for (; pl != NULL; pl = pl->pl_next) {
1432                 char *recvdval = NULL;
1433                 /*
1434                  * Skip the special fake placeholder.  This will also skip over
1435                  * the name property when 'all' is specified.
1436                  */
1437                 if (pl->pl_prop == ZFS_PROP_NAME &&
1438                     pl == cbp->cb_proplist)
1439                         continue;
1440
1441                 if (pl->pl_prop != ZPROP_INVAL) {
1442                         if (zfs_prop_get(zhp, pl->pl_prop, buf,
1443                             sizeof (buf), &sourcetype, source,
1444                             sizeof (source),
1445                             cbp->cb_literal) != 0) {
1446                                 if (pl->pl_all)
1447                                         continue;
1448                                 if (!zfs_prop_valid_for_type(pl->pl_prop,
1449                                     ZFS_TYPE_DATASET)) {
1450                                         (void) fprintf(stderr,
1451                                             gettext("No such property '%s'\n"),
1452                                             zfs_prop_to_name(pl->pl_prop));
1453                                         continue;
1454                                 }
1455                                 sourcetype = ZPROP_SRC_NONE;
1456                                 (void) strlcpy(buf, "-", sizeof (buf));
1457                         }
1458
1459                         if (received && (zfs_prop_get_recvd(zhp,
1460                             zfs_prop_to_name(pl->pl_prop), rbuf, sizeof (rbuf),
1461                             cbp->cb_literal) == 0))
1462                                 recvdval = rbuf;
1463
1464                         zprop_print_one_property(zfs_get_name(zhp), cbp,
1465                             zfs_prop_to_name(pl->pl_prop),
1466                             buf, sourcetype, source, recvdval);
1467                 } else if (zfs_prop_userquota(pl->pl_user_prop)) {
1468                         sourcetype = ZPROP_SRC_LOCAL;
1469
1470                         if (zfs_prop_get_userquota(zhp, pl->pl_user_prop,
1471                             buf, sizeof (buf), cbp->cb_literal) != 0) {
1472                                 sourcetype = ZPROP_SRC_NONE;
1473                                 (void) strlcpy(buf, "-", sizeof (buf));
1474                         }
1475
1476                         zprop_print_one_property(zfs_get_name(zhp), cbp,
1477                             pl->pl_user_prop, buf, sourcetype, source, NULL);
1478                 } else if (zfs_prop_written(pl->pl_user_prop)) {
1479                         sourcetype = ZPROP_SRC_LOCAL;
1480
1481                         if (zfs_prop_get_written(zhp, pl->pl_user_prop,
1482                             buf, sizeof (buf), cbp->cb_literal) != 0) {
1483                                 sourcetype = ZPROP_SRC_NONE;
1484                                 (void) strlcpy(buf, "-", sizeof (buf));
1485                         }
1486
1487                         zprop_print_one_property(zfs_get_name(zhp), cbp,
1488                             pl->pl_user_prop, buf, sourcetype, source, NULL);
1489                 } else {
1490                         if (nvlist_lookup_nvlist(user_props,
1491                             pl->pl_user_prop, &propval) != 0) {
1492                                 if (pl->pl_all)
1493                                         continue;
1494                                 sourcetype = ZPROP_SRC_NONE;
1495                                 strval = "-";
1496                         } else {
1497                                 verify(nvlist_lookup_string(propval,
1498                                     ZPROP_VALUE, &strval) == 0);
1499                                 verify(nvlist_lookup_string(propval,
1500                                     ZPROP_SOURCE, &sourceval) == 0);
1501
1502                                 if (strcmp(sourceval,
1503                                     zfs_get_name(zhp)) == 0) {
1504                                         sourcetype = ZPROP_SRC_LOCAL;
1505                                 } else if (strcmp(sourceval,
1506                                     ZPROP_SOURCE_VAL_RECVD) == 0) {
1507                                         sourcetype = ZPROP_SRC_RECEIVED;
1508                                 } else {
1509                                         sourcetype = ZPROP_SRC_INHERITED;
1510                                         (void) strlcpy(source,
1511                                             sourceval, sizeof (source));
1512                                 }
1513                         }
1514
1515                         if (received && (zfs_prop_get_recvd(zhp,
1516                             pl->pl_user_prop, rbuf, sizeof (rbuf),
1517                             cbp->cb_literal) == 0))
1518                                 recvdval = rbuf;
1519
1520                         zprop_print_one_property(zfs_get_name(zhp), cbp,
1521                             pl->pl_user_prop, strval, sourcetype,
1522                             source, recvdval);
1523                 }
1524         }
1525
1526         return (0);
1527 }
1528
1529 static int
1530 zfs_do_get(int argc, char **argv)
1531 {
1532         zprop_get_cbdata_t cb = { 0 };
1533         int i, c, flags = ZFS_ITER_ARGS_CAN_BE_PATHS;
1534         int types = ZFS_TYPE_DATASET;
1535         char *value, *fields;
1536         int ret = 0;
1537         int limit = 0;
1538         zprop_list_t fake_name = { 0 };
1539
1540         /*
1541          * Set up default columns and sources.
1542          */
1543         cb.cb_sources = ZPROP_SRC_ALL;
1544         cb.cb_columns[0] = GET_COL_NAME;
1545         cb.cb_columns[1] = GET_COL_PROPERTY;
1546         cb.cb_columns[2] = GET_COL_VALUE;
1547         cb.cb_columns[3] = GET_COL_SOURCE;
1548         cb.cb_type = ZFS_TYPE_DATASET;
1549
1550         /* check options */
1551         while ((c = getopt(argc, argv, ":d:o:s:rt:Hp")) != -1) {
1552                 switch (c) {
1553                 case 'p':
1554                         cb.cb_literal = B_TRUE;
1555                         break;
1556                 case 'd':
1557                         limit = parse_depth(optarg, &flags);
1558                         break;
1559                 case 'r':
1560                         flags |= ZFS_ITER_RECURSE;
1561                         break;
1562                 case 'H':
1563                         cb.cb_scripted = B_TRUE;
1564                         break;
1565                 case ':':
1566                         (void) fprintf(stderr, gettext("missing argument for "
1567                             "'%c' option\n"), optopt);
1568                         usage(B_FALSE);
1569                         break;
1570                 case 'o':
1571                         /*
1572                          * Process the set of columns to display.  We zero out
1573                          * the structure to give us a blank slate.
1574                          */
1575                         bzero(&cb.cb_columns, sizeof (cb.cb_columns));
1576                         i = 0;
1577                         while (*optarg != '\0') {
1578                                 static char *col_subopts[] =
1579                                     { "name", "property", "value", "received",
1580                                     "source", "all", NULL };
1581
1582                                 if (i == ZFS_GET_NCOLS) {
1583                                         (void) fprintf(stderr, gettext("too "
1584                                             "many fields given to -o "
1585                                             "option\n"));
1586                                         usage(B_FALSE);
1587                                 }
1588
1589                                 switch (getsubopt(&optarg, col_subopts,
1590                                     &value)) {
1591                                 case 0:
1592                                         cb.cb_columns[i++] = GET_COL_NAME;
1593                                         break;
1594                                 case 1:
1595                                         cb.cb_columns[i++] = GET_COL_PROPERTY;
1596                                         break;
1597                                 case 2:
1598                                         cb.cb_columns[i++] = GET_COL_VALUE;
1599                                         break;
1600                                 case 3:
1601                                         cb.cb_columns[i++] = GET_COL_RECVD;
1602                                         flags |= ZFS_ITER_RECVD_PROPS;
1603                                         break;
1604                                 case 4:
1605                                         cb.cb_columns[i++] = GET_COL_SOURCE;
1606                                         break;
1607                                 case 5:
1608                                         if (i > 0) {
1609                                                 (void) fprintf(stderr,
1610                                                     gettext("\"all\" conflicts "
1611                                                     "with specific fields "
1612                                                     "given to -o option\n"));
1613                                                 usage(B_FALSE);
1614                                         }
1615                                         cb.cb_columns[0] = GET_COL_NAME;
1616                                         cb.cb_columns[1] = GET_COL_PROPERTY;
1617                                         cb.cb_columns[2] = GET_COL_VALUE;
1618                                         cb.cb_columns[3] = GET_COL_RECVD;
1619                                         cb.cb_columns[4] = GET_COL_SOURCE;
1620                                         flags |= ZFS_ITER_RECVD_PROPS;
1621                                         i = ZFS_GET_NCOLS;
1622                                         break;
1623                                 default:
1624                                         (void) fprintf(stderr,
1625                                             gettext("invalid column name "
1626                                             "'%s'\n"), value);
1627                                         usage(B_FALSE);
1628                                 }
1629                         }
1630                         break;
1631
1632                 case 's':
1633                         cb.cb_sources = 0;
1634                         while (*optarg != '\0') {
1635                                 static char *source_subopts[] = {
1636                                         "local", "default", "inherited",
1637                                         "received", "temporary", "none",
1638                                         NULL };
1639
1640                                 switch (getsubopt(&optarg, source_subopts,
1641                                     &value)) {
1642                                 case 0:
1643                                         cb.cb_sources |= ZPROP_SRC_LOCAL;
1644                                         break;
1645                                 case 1:
1646                                         cb.cb_sources |= ZPROP_SRC_DEFAULT;
1647                                         break;
1648                                 case 2:
1649                                         cb.cb_sources |= ZPROP_SRC_INHERITED;
1650                                         break;
1651                                 case 3:
1652                                         cb.cb_sources |= ZPROP_SRC_RECEIVED;
1653                                         break;
1654                                 case 4:
1655                                         cb.cb_sources |= ZPROP_SRC_TEMPORARY;
1656                                         break;
1657                                 case 5:
1658                                         cb.cb_sources |= ZPROP_SRC_NONE;
1659                                         break;
1660                                 default:
1661                                         (void) fprintf(stderr,
1662                                             gettext("invalid source "
1663                                             "'%s'\n"), value);
1664                                         usage(B_FALSE);
1665                                 }
1666                         }
1667                         break;
1668
1669                 case 't':
1670                         types = 0;
1671                         flags &= ~ZFS_ITER_PROP_LISTSNAPS;
1672                         while (*optarg != '\0') {
1673                                 static char *type_subopts[] = { "filesystem",
1674                                     "volume", "snapshot", "all", NULL };
1675
1676                                 switch (getsubopt(&optarg, type_subopts,
1677                                     &value)) {
1678                                 case 0:
1679                                         types |= ZFS_TYPE_FILESYSTEM;
1680                                         break;
1681                                 case 1:
1682                                         types |= ZFS_TYPE_VOLUME;
1683                                         break;
1684                                 case 2:
1685                                         types |= ZFS_TYPE_SNAPSHOT;
1686                                         break;
1687                                 case 3:
1688                                         types = ZFS_TYPE_DATASET;
1689                                         break;
1690
1691                                 default:
1692                                         (void) fprintf(stderr,
1693                                             gettext("invalid type '%s'\n"),
1694                                             value);
1695                                         usage(B_FALSE);
1696                                 }
1697                         }
1698                         break;
1699
1700                 case '?':
1701                         (void) fprintf(stderr, gettext("invalid option '%c'\n"),
1702                             optopt);
1703                         usage(B_FALSE);
1704                 }
1705         }
1706
1707         argc -= optind;
1708         argv += optind;
1709
1710         if (argc < 1) {
1711                 (void) fprintf(stderr, gettext("missing property "
1712                     "argument\n"));
1713                 usage(B_FALSE);
1714         }
1715
1716         fields = argv[0];
1717
1718         if (zprop_get_list(g_zfs, fields, &cb.cb_proplist, ZFS_TYPE_DATASET)
1719             != 0)
1720                 usage(B_FALSE);
1721
1722         argc--;
1723         argv++;
1724
1725         /*
1726          * As part of zfs_expand_proplist(), we keep track of the maximum column
1727          * width for each property.  For the 'NAME' (and 'SOURCE') columns, we
1728          * need to know the maximum name length.  However, the user likely did
1729          * not specify 'name' as one of the properties to fetch, so we need to
1730          * make sure we always include at least this property for
1731          * print_get_headers() to work properly.
1732          */
1733         if (cb.cb_proplist != NULL) {
1734                 fake_name.pl_prop = ZFS_PROP_NAME;
1735                 fake_name.pl_width = strlen(gettext("NAME"));
1736                 fake_name.pl_next = cb.cb_proplist;
1737                 cb.cb_proplist = &fake_name;
1738         }
1739
1740         cb.cb_first = B_TRUE;
1741
1742         /* run for each object */
1743         ret = zfs_for_each(argc, argv, flags, types, NULL,
1744             &cb.cb_proplist, limit, get_callback, &cb);
1745
1746         if (cb.cb_proplist == &fake_name)
1747                 zprop_free_list(fake_name.pl_next);
1748         else
1749                 zprop_free_list(cb.cb_proplist);
1750
1751         return (ret);
1752 }
1753
1754 /*
1755  * inherit [-rS] <property> <fs|vol> ...
1756  *
1757  *      -r      Recurse over all children
1758  *      -S      Revert to received value, if any
1759  *
1760  * For each dataset specified on the command line, inherit the given property
1761  * from its parent.  Inheriting a property at the pool level will cause it to
1762  * use the default value.  The '-r' flag will recurse over all children, and is
1763  * useful for setting a property on a hierarchy-wide basis, regardless of any
1764  * local modifications for each dataset.
1765  */
1766
1767 typedef struct inherit_cbdata {
1768         const char *cb_propname;
1769         boolean_t cb_received;
1770 } inherit_cbdata_t;
1771
1772 static int
1773 inherit_recurse_cb(zfs_handle_t *zhp, void *data)
1774 {
1775         inherit_cbdata_t *cb = data;
1776         zfs_prop_t prop = zfs_name_to_prop(cb->cb_propname);
1777
1778         /*
1779          * If we're doing it recursively, then ignore properties that
1780          * are not valid for this type of dataset.
1781          */
1782         if (prop != ZPROP_INVAL &&
1783             !zfs_prop_valid_for_type(prop, zfs_get_type(zhp)))
1784                 return (0);
1785
1786         return (zfs_prop_inherit(zhp, cb->cb_propname, cb->cb_received) != 0);
1787 }
1788
1789 static int
1790 inherit_cb(zfs_handle_t *zhp, void *data)
1791 {
1792         inherit_cbdata_t *cb = data;
1793
1794         return (zfs_prop_inherit(zhp, cb->cb_propname, cb->cb_received) != 0);
1795 }
1796
1797 static int
1798 zfs_do_inherit(int argc, char **argv)
1799 {
1800         int c;
1801         zfs_prop_t prop;
1802         inherit_cbdata_t cb = { 0 };
1803         char *propname;
1804         int ret = 0;
1805         int flags = 0;
1806         boolean_t received = B_FALSE;
1807
1808         /* check options */
1809         while ((c = getopt(argc, argv, "rS")) != -1) {
1810                 switch (c) {
1811                 case 'r':
1812                         flags |= ZFS_ITER_RECURSE;
1813                         break;
1814                 case 'S':
1815                         received = B_TRUE;
1816                         break;
1817                 case '?':
1818                 default:
1819                         (void) fprintf(stderr, gettext("invalid option '%c'\n"),
1820                             optopt);
1821                         usage(B_FALSE);
1822                 }
1823         }
1824
1825         argc -= optind;
1826         argv += optind;
1827
1828         /* check number of arguments */
1829         if (argc < 1) {
1830                 (void) fprintf(stderr, gettext("missing property argument\n"));
1831                 usage(B_FALSE);
1832         }
1833         if (argc < 2) {
1834                 (void) fprintf(stderr, gettext("missing dataset argument\n"));
1835                 usage(B_FALSE);
1836         }
1837
1838         propname = argv[0];
1839         argc--;
1840         argv++;
1841
1842         if ((prop = zfs_name_to_prop(propname)) != ZPROP_INVAL) {
1843                 if (zfs_prop_readonly(prop)) {
1844                         (void) fprintf(stderr, gettext(
1845                             "%s property is read-only\n"),
1846                             propname);
1847                         return (1);
1848                 }
1849                 if (!zfs_prop_inheritable(prop) && !received) {
1850                         (void) fprintf(stderr, gettext("'%s' property cannot "
1851                             "be inherited\n"), propname);
1852                         if (prop == ZFS_PROP_QUOTA ||
1853                             prop == ZFS_PROP_RESERVATION ||
1854                             prop == ZFS_PROP_REFQUOTA ||
1855                             prop == ZFS_PROP_REFRESERVATION)
1856                                 (void) fprintf(stderr, gettext("use 'zfs set "
1857                                     "%s=none' to clear\n"), propname);
1858                         return (1);
1859                 }
1860                 if (received && (prop == ZFS_PROP_VOLSIZE ||
1861                     prop == ZFS_PROP_VERSION)) {
1862                         (void) fprintf(stderr, gettext("'%s' property cannot "
1863                             "be reverted to a received value\n"), propname);
1864                         return (1);
1865                 }
1866         } else if (!zfs_prop_user(propname)) {
1867                 (void) fprintf(stderr, gettext("invalid property '%s'\n"),
1868                     propname);
1869                 usage(B_FALSE);
1870         }
1871
1872         cb.cb_propname = propname;
1873         cb.cb_received = received;
1874
1875         if (flags & ZFS_ITER_RECURSE) {
1876                 ret = zfs_for_each(argc, argv, flags, ZFS_TYPE_DATASET,
1877                     NULL, NULL, 0, inherit_recurse_cb, &cb);
1878         } else {
1879                 ret = zfs_for_each(argc, argv, flags, ZFS_TYPE_DATASET,
1880                     NULL, NULL, 0, inherit_cb, &cb);
1881         }
1882
1883         return (ret);
1884 }
1885
1886 typedef struct upgrade_cbdata {
1887         uint64_t cb_numupgraded;
1888         uint64_t cb_numsamegraded;
1889         uint64_t cb_numfailed;
1890         uint64_t cb_version;
1891         boolean_t cb_newer;
1892         boolean_t cb_foundone;
1893         char cb_lastfs[ZFS_MAXNAMELEN];
1894 } upgrade_cbdata_t;
1895
1896 static int
1897 same_pool(zfs_handle_t *zhp, const char *name)
1898 {
1899         int len1 = strcspn(name, "/@");
1900         const char *zhname = zfs_get_name(zhp);
1901         int len2 = strcspn(zhname, "/@");
1902
1903         if (len1 != len2)
1904                 return (B_FALSE);
1905         return (strncmp(name, zhname, len1) == 0);
1906 }
1907
1908 static int
1909 upgrade_list_callback(zfs_handle_t *zhp, void *data)
1910 {
1911         upgrade_cbdata_t *cb = data;
1912         int version = zfs_prop_get_int(zhp, ZFS_PROP_VERSION);
1913
1914         /* list if it's old/new */
1915         if ((!cb->cb_newer && version < ZPL_VERSION) ||
1916             (cb->cb_newer && version > ZPL_VERSION)) {
1917                 char *str;
1918                 if (cb->cb_newer) {
1919                         str = gettext("The following filesystems are "
1920                             "formatted using a newer software version and\n"
1921                             "cannot be accessed on the current system.\n\n");
1922                 } else {
1923                         str = gettext("The following filesystems are "
1924                             "out of date, and can be upgraded.  After being\n"
1925                             "upgraded, these filesystems (and any 'zfs send' "
1926                             "streams generated from\n"
1927                             "subsequent snapshots) will no longer be "
1928                             "accessible by older software versions.\n\n");
1929                 }
1930
1931                 if (!cb->cb_foundone) {
1932                         (void) puts(str);
1933                         (void) printf(gettext("VER  FILESYSTEM\n"));
1934                         (void) printf(gettext("---  ------------\n"));
1935                         cb->cb_foundone = B_TRUE;
1936                 }
1937
1938                 (void) printf("%2u   %s\n", version, zfs_get_name(zhp));
1939         }
1940
1941         return (0);
1942 }
1943
1944 static int
1945 upgrade_set_callback(zfs_handle_t *zhp, void *data)
1946 {
1947         upgrade_cbdata_t *cb = data;
1948         int version = zfs_prop_get_int(zhp, ZFS_PROP_VERSION);
1949         int needed_spa_version;
1950         int spa_version;
1951
1952         if (zfs_spa_version(zhp, &spa_version) < 0)
1953                 return (-1);
1954
1955         needed_spa_version = zfs_spa_version_map(cb->cb_version);
1956
1957         if (needed_spa_version < 0)
1958                 return (-1);
1959
1960         if (spa_version < needed_spa_version) {
1961                 /* can't upgrade */
1962                 (void) printf(gettext("%s: can not be "
1963                     "upgraded; the pool version needs to first "
1964                     "be upgraded\nto version %d\n\n"),
1965                     zfs_get_name(zhp), needed_spa_version);
1966                 cb->cb_numfailed++;
1967                 return (0);
1968         }
1969
1970         /* upgrade */
1971         if (version < cb->cb_version) {
1972                 char verstr[16];
1973                 (void) snprintf(verstr, sizeof (verstr),
1974                     "%llu", cb->cb_version);
1975                 if (cb->cb_lastfs[0] && !same_pool(zhp, cb->cb_lastfs)) {
1976                         /*
1977                          * If they did "zfs upgrade -a", then we could
1978                          * be doing ioctls to different pools.  We need
1979                          * to log this history once to each pool, and bypass
1980                          * the normal history logging that happens in main().
1981                          */
1982                         (void) zpool_log_history(g_zfs, history_str);
1983                         log_history = B_FALSE;
1984                 }
1985                 if (zfs_prop_set(zhp, "version", verstr) == 0)
1986                         cb->cb_numupgraded++;
1987                 else
1988                         cb->cb_numfailed++;
1989                 (void) strcpy(cb->cb_lastfs, zfs_get_name(zhp));
1990         } else if (version > cb->cb_version) {
1991                 /* can't downgrade */
1992                 (void) printf(gettext("%s: can not be downgraded; "
1993                     "it is already at version %u\n"),
1994                     zfs_get_name(zhp), version);
1995                 cb->cb_numfailed++;
1996         } else {
1997                 cb->cb_numsamegraded++;
1998         }
1999         return (0);
2000 }
2001
2002 /*
2003  * zfs upgrade
2004  * zfs upgrade -v
2005  * zfs upgrade [-r] [-V <version>] <-a | filesystem>
2006  */
2007 static int
2008 zfs_do_upgrade(int argc, char **argv)
2009 {
2010         boolean_t all = B_FALSE;
2011         boolean_t showversions = B_FALSE;
2012         int ret = 0;
2013         upgrade_cbdata_t cb = { 0 };
2014         int c;
2015         int flags = ZFS_ITER_ARGS_CAN_BE_PATHS;
2016
2017         /* check options */
2018         while ((c = getopt(argc, argv, "rvV:a")) != -1) {
2019                 switch (c) {
2020                 case 'r':
2021                         flags |= ZFS_ITER_RECURSE;
2022                         break;
2023                 case 'v':
2024                         showversions = B_TRUE;
2025                         break;
2026                 case 'V':
2027                         if (zfs_prop_string_to_index(ZFS_PROP_VERSION,
2028                             optarg, &cb.cb_version) != 0) {
2029                                 (void) fprintf(stderr,
2030                                     gettext("invalid version %s\n"), optarg);
2031                                 usage(B_FALSE);
2032                         }
2033                         break;
2034                 case 'a':
2035                         all = B_TRUE;
2036                         break;
2037                 case '?':
2038                 default:
2039                         (void) fprintf(stderr, gettext("invalid option '%c'\n"),
2040                             optopt);
2041                         usage(B_FALSE);
2042                 }
2043         }
2044
2045         argc -= optind;
2046         argv += optind;
2047
2048         if ((!all && !argc) && ((flags & ZFS_ITER_RECURSE) | cb.cb_version))
2049                 usage(B_FALSE);
2050         if (showversions && (flags & ZFS_ITER_RECURSE || all ||
2051             cb.cb_version || argc))
2052                 usage(B_FALSE);
2053         if ((all || argc) && (showversions))
2054                 usage(B_FALSE);
2055         if (all && argc)
2056                 usage(B_FALSE);
2057
2058         if (showversions) {
2059                 /* Show info on available versions. */
2060                 (void) printf(gettext("The following filesystem versions are "
2061                     "supported:\n\n"));
2062                 (void) printf(gettext("VER  DESCRIPTION\n"));
2063                 (void) printf("---  -----------------------------------------"
2064                     "---------------\n");
2065                 (void) printf(gettext(" 1   Initial ZFS filesystem version\n"));
2066                 (void) printf(gettext(" 2   Enhanced directory entries\n"));
2067                 (void) printf(gettext(" 3   Case insensitive and filesystem "
2068                     "user identifier (FUID)\n"));
2069                 (void) printf(gettext(" 4   userquota, groupquota "
2070                     "properties\n"));
2071                 (void) printf(gettext(" 5   System attributes\n"));
2072                 (void) printf(gettext("\nFor more information on a particular "
2073                     "version, including supported releases,\n"));
2074                 (void) printf("see the ZFS Administration Guide.\n\n");
2075                 ret = 0;
2076         } else if (argc || all) {
2077                 /* Upgrade filesystems */
2078                 if (cb.cb_version == 0)
2079                         cb.cb_version = ZPL_VERSION;
2080                 ret = zfs_for_each(argc, argv, flags, ZFS_TYPE_FILESYSTEM,
2081                     NULL, NULL, 0, upgrade_set_callback, &cb);
2082                 (void) printf(gettext("%llu filesystems upgraded\n"),
2083                     cb.cb_numupgraded);
2084                 if (cb.cb_numsamegraded) {
2085                         (void) printf(gettext("%llu filesystems already at "
2086                             "this version\n"),
2087                             cb.cb_numsamegraded);
2088                 }
2089                 if (cb.cb_numfailed != 0)
2090                         ret = 1;
2091         } else {
2092                 /* List old-version filesytems */
2093                 boolean_t found;
2094                 (void) printf(gettext("This system is currently running "
2095                     "ZFS filesystem version %llu.\n\n"), ZPL_VERSION);
2096
2097                 flags |= ZFS_ITER_RECURSE;
2098                 ret = zfs_for_each(0, NULL, flags, ZFS_TYPE_FILESYSTEM,
2099                     NULL, NULL, 0, upgrade_list_callback, &cb);
2100
2101                 found = cb.cb_foundone;
2102                 cb.cb_foundone = B_FALSE;
2103                 cb.cb_newer = B_TRUE;
2104
2105                 ret = zfs_for_each(0, NULL, flags, ZFS_TYPE_FILESYSTEM,
2106                     NULL, NULL, 0, upgrade_list_callback, &cb);
2107
2108                 if (!cb.cb_foundone && !found) {
2109                         (void) printf(gettext("All filesystems are "
2110                             "formatted with the current version.\n"));
2111                 }
2112         }
2113
2114         return (ret);
2115 }
2116
2117 /*
2118  * zfs userspace [-Hinp] [-o field[,...]] [-s field [-s field]...]
2119  *               [-S field [-S field]...] [-t type[,...]] filesystem | snapshot
2120  * zfs groupspace [-Hinp] [-o field[,...]] [-s field [-s field]...]
2121  *                [-S field [-S field]...] [-t type[,...]] filesystem | snapshot
2122  *
2123  *      -H      Scripted mode; elide headers and separate columns by tabs.
2124  *      -i      Translate SID to POSIX ID.
2125  *      -n      Print numeric ID instead of user/group name.
2126  *      -o      Control which fields to display.
2127  *      -p      Use exact (parseable) numeric output.
2128  *      -s      Specify sort columns, descending order.
2129  *      -S      Specify sort columns, ascending order.
2130  *      -t      Control which object types to display.
2131  *
2132  *      Displays space consumed by, and quotas on, each user in the specified
2133  *      filesystem or snapshot.
2134  */
2135
2136 /* us_field_types, us_field_hdr and us_field_names should be kept in sync */
2137 enum us_field_types {
2138         USFIELD_TYPE,
2139         USFIELD_NAME,
2140         USFIELD_USED,
2141         USFIELD_QUOTA
2142 };
2143 static char *us_field_hdr[] = { "TYPE", "NAME", "USED", "QUOTA" };
2144 static char *us_field_names[] = { "type", "name", "used", "quota" };
2145 #define USFIELD_LAST    (sizeof (us_field_names) / sizeof (char *))
2146
2147 #define USTYPE_PSX_GRP  (1 << 0)
2148 #define USTYPE_PSX_USR  (1 << 1)
2149 #define USTYPE_SMB_GRP  (1 << 2)
2150 #define USTYPE_SMB_USR  (1 << 3)
2151 #define USTYPE_ALL      \
2152         (USTYPE_PSX_GRP | USTYPE_PSX_USR | USTYPE_SMB_GRP | USTYPE_SMB_USR)
2153
2154 static int us_type_bits[] = {
2155         USTYPE_PSX_GRP,
2156         USTYPE_PSX_USR,
2157         USTYPE_SMB_GRP,
2158         USTYPE_SMB_USR,
2159         USTYPE_ALL
2160 };
2161 static char *us_type_names[] = { "posixgroup", "posxiuser", "smbgroup",
2162         "smbuser", "all" };
2163
2164 typedef struct us_node {
2165         nvlist_t        *usn_nvl;
2166         uu_avl_node_t   usn_avlnode;
2167         uu_list_node_t  usn_listnode;
2168 } us_node_t;
2169
2170 typedef struct us_cbdata {
2171         nvlist_t        **cb_nvlp;
2172         uu_avl_pool_t   *cb_avl_pool;
2173         uu_avl_t        *cb_avl;
2174         boolean_t       cb_numname;
2175         boolean_t       cb_nicenum;
2176         boolean_t       cb_sid2posix;
2177         zfs_userquota_prop_t cb_prop;
2178         zfs_sort_column_t *cb_sortcol;
2179         size_t          cb_width[USFIELD_LAST];
2180 } us_cbdata_t;
2181
2182 static boolean_t us_populated = B_FALSE;
2183
2184 typedef struct {
2185         zfs_sort_column_t *si_sortcol;
2186         boolean_t       si_numname;
2187 } us_sort_info_t;
2188
2189 static int
2190 us_field_index(char *field)
2191 {
2192         int i;
2193
2194         for (i = 0; i < USFIELD_LAST; i++) {
2195                 if (strcmp(field, us_field_names[i]) == 0)
2196                         return (i);
2197         }
2198
2199         return (-1);
2200 }
2201
2202 static int
2203 us_compare(const void *larg, const void *rarg, void *unused)
2204 {
2205         const us_node_t *l = larg;
2206         const us_node_t *r = rarg;
2207         us_sort_info_t *si = (us_sort_info_t *)unused;
2208         zfs_sort_column_t *sortcol = si->si_sortcol;
2209         boolean_t numname = si->si_numname;
2210         nvlist_t *lnvl = l->usn_nvl;
2211         nvlist_t *rnvl = r->usn_nvl;
2212         int rc = 0;
2213         boolean_t lvb, rvb;
2214
2215         for (; sortcol != NULL; sortcol = sortcol->sc_next) {
2216                 char *lvstr = "";
2217                 char *rvstr = "";
2218                 uint32_t lv32 = 0;
2219                 uint32_t rv32 = 0;
2220                 uint64_t lv64 = 0;
2221                 uint64_t rv64 = 0;
2222                 zfs_prop_t prop = sortcol->sc_prop;
2223                 const char *propname = NULL;
2224                 boolean_t reverse = sortcol->sc_reverse;
2225
2226                 switch (prop) {
2227                 case ZFS_PROP_TYPE:
2228                         propname = "type";
2229                         (void) nvlist_lookup_uint32(lnvl, propname, &lv32);
2230                         (void) nvlist_lookup_uint32(rnvl, propname, &rv32);
2231                         if (rv32 != lv32)
2232                                 rc = (rv32 < lv32) ? 1 : -1;
2233                         break;
2234                 case ZFS_PROP_NAME:
2235                         propname = "name";
2236                         if (numname) {
2237                                 (void) nvlist_lookup_uint64(lnvl, propname,
2238                                     &lv64);
2239                                 (void) nvlist_lookup_uint64(rnvl, propname,
2240                                     &rv64);
2241                                 if (rv64 != lv64)
2242                                         rc = (rv64 < lv64) ? 1 : -1;
2243                         } else {
2244                                 (void) nvlist_lookup_string(lnvl, propname,
2245                                     &lvstr);
2246                                 (void) nvlist_lookup_string(rnvl, propname,
2247                                     &rvstr);
2248                                 rc = strcmp(lvstr, rvstr);
2249                         }
2250                         break;
2251                 case ZFS_PROP_USED:
2252                 case ZFS_PROP_QUOTA:
2253                         if (!us_populated)
2254                                 break;
2255                         if (prop == ZFS_PROP_USED)
2256                                 propname = "used";
2257                         else
2258                                 propname = "quota";
2259                         (void) nvlist_lookup_uint64(lnvl, propname, &lv64);
2260                         (void) nvlist_lookup_uint64(rnvl, propname, &rv64);
2261                         if (rv64 != lv64)
2262                                 rc = (rv64 < lv64) ? 1 : -1;
2263                         break;
2264                 }
2265
2266                 if (rc != 0) {
2267                         if (rc < 0)
2268                                 return (reverse ? 1 : -1);
2269                         else
2270                                 return (reverse ? -1 : 1);
2271                 }
2272         }
2273
2274         /*
2275          * If entries still seem to be the same, check if they are of the same
2276          * type (smbentity is added only if we are doing SID to POSIX ID
2277          * translation where we can have duplicate type/name combinations).
2278          */
2279         if (nvlist_lookup_boolean_value(lnvl, "smbentity", &lvb) == 0 &&
2280             nvlist_lookup_boolean_value(rnvl, "smbentity", &rvb) == 0 &&
2281             lvb != rvb)
2282                 return (lvb < rvb ? -1 : 1);
2283
2284         return (0);
2285 }
2286
2287 static inline const char *
2288 us_type2str(unsigned field_type)
2289 {
2290         switch (field_type) {
2291         case USTYPE_PSX_USR:
2292                 return ("POSIX User");
2293         case USTYPE_PSX_GRP:
2294                 return ("POSIX Group");
2295         case USTYPE_SMB_USR:
2296                 return ("SMB User");
2297         case USTYPE_SMB_GRP:
2298                 return ("SMB Group");
2299         default:
2300                 return ("Undefined");
2301         }
2302 }
2303
2304 static int
2305 userspace_cb(void *arg, const char *domain, uid_t rid, uint64_t space)
2306 {
2307         us_cbdata_t *cb = (us_cbdata_t *)arg;
2308         zfs_userquota_prop_t prop = cb->cb_prop;
2309         char *name = NULL;
2310         char *propname;
2311         char sizebuf[32];
2312         us_node_t *node;
2313         uu_avl_pool_t *avl_pool = cb->cb_avl_pool;
2314         uu_avl_t *avl = cb->cb_avl;
2315         uu_avl_index_t idx;
2316         nvlist_t *props;
2317         us_node_t *n;
2318         zfs_sort_column_t *sortcol = cb->cb_sortcol;
2319         unsigned type;
2320         const char *typestr;
2321         size_t namelen;
2322         size_t typelen;
2323         size_t sizelen;
2324         int typeidx, nameidx, sizeidx;
2325         us_sort_info_t sortinfo = { sortcol, cb->cb_numname };
2326         boolean_t smbentity = B_FALSE;
2327
2328         if (nvlist_alloc(&props, NV_UNIQUE_NAME, 0) != 0)
2329                 nomem();
2330         node = safe_malloc(sizeof (us_node_t));
2331         uu_avl_node_init(node, &node->usn_avlnode, avl_pool);
2332         node->usn_nvl = props;
2333
2334         if (domain != NULL && domain[0] != '\0') {
2335                 /* SMB */
2336                 char sid[ZFS_MAXNAMELEN + 32];
2337                 uid_t id;
2338                 uint64_t classes;
2339 #ifdef sun
2340                 int err;
2341                 directory_error_t e;
2342 #endif
2343
2344                 smbentity = B_TRUE;
2345
2346                 (void) snprintf(sid, sizeof (sid), "%s-%u", domain, rid);
2347
2348                 if (prop == ZFS_PROP_GROUPUSED || prop == ZFS_PROP_GROUPQUOTA) {
2349                         type = USTYPE_SMB_GRP;
2350 #ifdef sun
2351                         err = sid_to_id(sid, B_FALSE, &id);
2352 #endif
2353                 } else {
2354                         type = USTYPE_SMB_USR;
2355 #ifdef sun
2356                         err = sid_to_id(sid, B_TRUE, &id);
2357 #endif
2358                 }
2359
2360 #ifdef sun
2361                 if (err == 0) {
2362                         rid = id;
2363                         if (!cb->cb_sid2posix) {
2364                                 e = directory_name_from_sid(NULL, sid, &name,
2365                                     &classes);
2366                                 if (e != NULL)
2367                                         directory_error_free(e);
2368                                 if (name == NULL)
2369                                         name = sid;
2370                         }
2371                 }
2372 #endif
2373         }
2374
2375         if (cb->cb_sid2posix || domain == NULL || domain[0] == '\0') {
2376                 /* POSIX or -i */
2377                 if (prop == ZFS_PROP_GROUPUSED || prop == ZFS_PROP_GROUPQUOTA) {
2378                         type = USTYPE_PSX_GRP;
2379                         if (!cb->cb_numname) {
2380                                 struct group *g;
2381
2382                                 if ((g = getgrgid(rid)) != NULL)
2383                                         name = g->gr_name;
2384                         }
2385                 } else {
2386                         type = USTYPE_PSX_USR;
2387                         if (!cb->cb_numname) {
2388                                 struct passwd *p;
2389
2390                                 if ((p = getpwuid(rid)) != NULL)
2391                                         name = p->pw_name;
2392                         }
2393                 }
2394         }
2395
2396         /*
2397          * Make sure that the type/name combination is unique when doing
2398          * SID to POSIX ID translation (hence changing the type from SMB to
2399          * POSIX).
2400          */
2401         if (cb->cb_sid2posix &&
2402             nvlist_add_boolean_value(props, "smbentity", smbentity) != 0)
2403                 nomem();
2404
2405         /* Calculate/update width of TYPE field */
2406         typestr = us_type2str(type);
2407         typelen = strlen(gettext(typestr));
2408         typeidx = us_field_index("type");
2409         if (typelen > cb->cb_width[typeidx])
2410                 cb->cb_width[typeidx] = typelen;
2411         if (nvlist_add_uint32(props, "type", type) != 0)
2412                 nomem();
2413
2414         /* Calculate/update width of NAME field */
2415         if ((cb->cb_numname && cb->cb_sid2posix) || name == NULL) {
2416                 if (nvlist_add_uint64(props, "name", rid) != 0)
2417                         nomem();
2418                 namelen = snprintf(NULL, 0, "%u", rid);
2419         } else {
2420                 if (nvlist_add_string(props, "name", name) != 0)
2421                         nomem();
2422                 namelen = strlen(name);
2423         }
2424         nameidx = us_field_index("name");
2425         if (namelen > cb->cb_width[nameidx])
2426                 cb->cb_width[nameidx] = namelen;
2427
2428         /*
2429          * Check if this type/name combination is in the list and update it;
2430          * otherwise add new node to the list.
2431          */
2432         if ((n = uu_avl_find(avl, node, &sortinfo, &idx)) == NULL) {
2433                 uu_avl_insert(avl, node, idx);
2434         } else {
2435                 nvlist_free(props);
2436                 free(node);
2437                 node = n;
2438                 props = node->usn_nvl;
2439         }
2440
2441         /* Calculate/update width of USED/QUOTA fields */
2442         if (cb->cb_nicenum)
2443                 zfs_nicenum(space, sizebuf, sizeof (sizebuf));
2444         else
2445                 (void) snprintf(sizebuf, sizeof (sizebuf), "%llu", space);
2446         sizelen = strlen(sizebuf);
2447         if (prop == ZFS_PROP_USERUSED || prop == ZFS_PROP_GROUPUSED) {
2448                 propname = "used";
2449                 if (!nvlist_exists(props, "quota"))
2450                         (void) nvlist_add_uint64(props, "quota", 0);
2451         } else {
2452                 propname = "quota";
2453                 if (!nvlist_exists(props, "used"))
2454                         (void) nvlist_add_uint64(props, "used", 0);
2455         }
2456         sizeidx = us_field_index(propname);
2457         if (sizelen > cb->cb_width[sizeidx])
2458                 cb->cb_width[sizeidx] = sizelen;
2459
2460         if (nvlist_add_uint64(props, propname, space) != 0)
2461                 nomem();
2462
2463         return (0);
2464 }
2465
2466 static void
2467 print_us_node(boolean_t scripted, boolean_t parsable, int *fields, int types,
2468     size_t *width, us_node_t *node)
2469 {
2470         nvlist_t *nvl = node->usn_nvl;
2471         char valstr[ZFS_MAXNAMELEN];
2472         boolean_t first = B_TRUE;
2473         int cfield = 0;
2474         int field;
2475         uint32_t ustype;
2476
2477         /* Check type */
2478         (void) nvlist_lookup_uint32(nvl, "type", &ustype);
2479         if (!(ustype & types))
2480                 return;
2481
2482         while ((field = fields[cfield]) != USFIELD_LAST) {
2483                 nvpair_t *nvp = NULL;
2484                 data_type_t type;
2485                 uint32_t val32;
2486                 uint64_t val64;
2487                 char *strval = NULL;
2488
2489                 while ((nvp = nvlist_next_nvpair(nvl, nvp)) != NULL) {
2490                         if (strcmp(nvpair_name(nvp),
2491                             us_field_names[field]) == 0)
2492                                 break;
2493                 }
2494
2495                 type = nvpair_type(nvp);
2496                 switch (type) {
2497                 case DATA_TYPE_UINT32:
2498                         (void) nvpair_value_uint32(nvp, &val32);
2499                         break;
2500                 case DATA_TYPE_UINT64:
2501                         (void) nvpair_value_uint64(nvp, &val64);
2502                         break;
2503                 case DATA_TYPE_STRING:
2504                         (void) nvpair_value_string(nvp, &strval);
2505                         break;
2506                 default:
2507                         (void) fprintf(stderr, "invalid data type\n");
2508                 }
2509
2510                 switch (field) {
2511                 case USFIELD_TYPE:
2512                         strval = (char *)us_type2str(val32);
2513                         break;
2514                 case USFIELD_NAME:
2515                         if (type == DATA_TYPE_UINT64) {
2516                                 (void) sprintf(valstr, "%llu", val64);
2517                                 strval = valstr;
2518                         }
2519                         break;
2520                 case USFIELD_USED:
2521                 case USFIELD_QUOTA:
2522                         if (type == DATA_TYPE_UINT64) {
2523                                 if (parsable) {
2524                                         (void) sprintf(valstr, "%llu", val64);
2525                                 } else {
2526                                         zfs_nicenum(val64, valstr,
2527                                             sizeof (valstr));
2528                                 }
2529                                 if (field == USFIELD_QUOTA &&
2530                                     strcmp(valstr, "0") == 0)
2531                                         strval = "none";
2532                                 else
2533                                         strval = valstr;
2534                         }
2535                         break;
2536                 }
2537
2538                 if (!first) {
2539                         if (scripted)
2540                                 (void) printf("\t");
2541                         else
2542                                 (void) printf("  ");
2543                 }
2544                 if (scripted)
2545                         (void) printf("%s", strval);
2546                 else if (field == USFIELD_TYPE || field == USFIELD_NAME)
2547                         (void) printf("%-*s", width[field], strval);
2548                 else
2549                         (void) printf("%*s", width[field], strval);
2550
2551                 first = B_FALSE;
2552                 cfield++;
2553         }
2554
2555         (void) printf("\n");
2556 }
2557
2558 static void
2559 print_us(boolean_t scripted, boolean_t parsable, int *fields, int types,
2560     size_t *width, boolean_t rmnode, uu_avl_t *avl)
2561 {
2562         us_node_t *node;
2563         const char *col;
2564         int cfield = 0;
2565         int field;
2566
2567         if (!scripted) {
2568                 boolean_t first = B_TRUE;
2569
2570                 while ((field = fields[cfield]) != USFIELD_LAST) {
2571                         col = gettext(us_field_hdr[field]);
2572                         if (field == USFIELD_TYPE || field == USFIELD_NAME) {
2573                                 (void) printf(first ? "%-*s" : "  %-*s",
2574                                     width[field], col);
2575                         } else {
2576                                 (void) printf(first ? "%*s" : "  %*s",
2577                                     width[field], col);
2578                         }
2579                         first = B_FALSE;
2580                         cfield++;
2581                 }
2582                 (void) printf("\n");
2583         }
2584
2585         for (node = uu_avl_first(avl); node; node = uu_avl_next(avl, node)) {
2586                 print_us_node(scripted, parsable, fields, types, width, node);
2587                 if (rmnode)
2588                         nvlist_free(node->usn_nvl);
2589         }
2590 }
2591
2592 static int
2593 zfs_do_userspace(int argc, char **argv)
2594 {
2595         zfs_handle_t *zhp;
2596         zfs_userquota_prop_t p;
2597
2598         uu_avl_pool_t *avl_pool;
2599         uu_avl_t *avl_tree;
2600         uu_avl_walk_t *walk;
2601         char *delim;
2602         char deffields[] = "type,name,used,quota";
2603         char *ofield = NULL;
2604         char *tfield = NULL;
2605         int cfield = 0;
2606         int fields[256];
2607         int i;
2608         boolean_t scripted = B_FALSE;
2609         boolean_t prtnum = B_FALSE;
2610         boolean_t parsable = B_FALSE;
2611         boolean_t sid2posix = B_FALSE;
2612         int ret = 0;
2613         int c;
2614         zfs_sort_column_t *sortcol = NULL;
2615         int types = USTYPE_PSX_USR | USTYPE_SMB_USR;
2616         us_cbdata_t cb;
2617         us_node_t *node;
2618         us_node_t *rmnode;
2619         uu_list_pool_t *listpool;
2620         uu_list_t *list;
2621         uu_avl_index_t idx = 0;
2622         uu_list_index_t idx2 = 0;
2623
2624         if (argc < 2)
2625                 usage(B_FALSE);
2626
2627         if (strcmp(argv[0], "groupspace") == 0)
2628                 /* Toggle default group types */
2629                 types = USTYPE_PSX_GRP | USTYPE_SMB_GRP;
2630
2631         while ((c = getopt(argc, argv, "nHpo:s:S:t:i")) != -1) {
2632                 switch (c) {
2633                 case 'n':
2634                         prtnum = B_TRUE;
2635                         break;
2636                 case 'H':
2637                         scripted = B_TRUE;
2638                         break;
2639                 case 'p':
2640                         parsable = B_TRUE;
2641                         break;
2642                 case 'o':
2643                         ofield = optarg;
2644                         break;
2645                 case 's':
2646                 case 'S':
2647                         if (zfs_add_sort_column(&sortcol, optarg,
2648                             c == 's' ? B_FALSE : B_TRUE) != 0) {
2649                                 (void) fprintf(stderr,
2650                                     gettext("invalid field '%s'\n"), optarg);
2651                                 usage(B_FALSE);
2652                         }
2653                         break;
2654                 case 't':
2655                         tfield = optarg;
2656                         break;
2657                 case 'i':
2658                         sid2posix = B_TRUE;
2659                         break;
2660                 case ':':
2661                         (void) fprintf(stderr, gettext("missing argument for "
2662                             "'%c' option\n"), optopt);
2663                         usage(B_FALSE);
2664                         break;
2665                 case '?':
2666                         (void) fprintf(stderr, gettext("invalid option '%c'\n"),
2667                             optopt);
2668                         usage(B_FALSE);
2669                 }
2670         }
2671
2672         argc -= optind;
2673         argv += optind;
2674
2675         if (argc < 1) {
2676                 (void) fprintf(stderr, gettext("missing dataset name\n"));
2677                 usage(B_FALSE);
2678         }
2679         if (argc > 1) {
2680                 (void) fprintf(stderr, gettext("too many arguments\n"));
2681                 usage(B_FALSE);
2682         }
2683
2684         /* Use default output fields if not specified using -o */
2685         if (ofield == NULL)
2686                 ofield = deffields;
2687         do {
2688                 if ((delim = strchr(ofield, ',')) != NULL)
2689                         *delim = '\0';
2690                 if ((fields[cfield++] = us_field_index(ofield)) == -1) {
2691                         (void) fprintf(stderr, gettext("invalid type '%s' "
2692                             "for -o option\n"), ofield);
2693                         return (-1);
2694                 }
2695                 if (delim != NULL)
2696                         ofield = delim + 1;
2697         } while (delim != NULL);
2698         fields[cfield] = USFIELD_LAST;
2699
2700         /* Override output types (-t option) */
2701         if (tfield != NULL) {
2702                 types = 0;
2703
2704                 do {
2705                         boolean_t found = B_FALSE;
2706
2707                         if ((delim = strchr(tfield, ',')) != NULL)
2708                                 *delim = '\0';
2709                         for (i = 0; i < sizeof (us_type_bits) / sizeof (int);
2710                             i++) {
2711                                 if (strcmp(tfield, us_type_names[i]) == 0) {
2712                                         found = B_TRUE;
2713                                         types |= us_type_bits[i];
2714                                         break;
2715                                 }
2716                         }
2717                         if (!found) {
2718                                 (void) fprintf(stderr, gettext("invalid type "
2719                                     "'%s' for -t option\n"), tfield);
2720                                 return (-1);
2721                         }
2722                         if (delim != NULL)
2723                                 tfield = delim + 1;
2724                 } while (delim != NULL);
2725         }
2726
2727         if ((zhp = zfs_open(g_zfs, argv[0], ZFS_TYPE_DATASET)) == NULL)
2728                 return (1);
2729
2730         if ((avl_pool = uu_avl_pool_create("us_avl_pool", sizeof (us_node_t),
2731             offsetof(us_node_t, usn_avlnode), us_compare, UU_DEFAULT)) == NULL)
2732                 nomem();
2733         if ((avl_tree = uu_avl_create(avl_pool, NULL, UU_DEFAULT)) == NULL)
2734                 nomem();
2735
2736         /* Always add default sorting columns */
2737         (void) zfs_add_sort_column(&sortcol, "type", B_FALSE);
2738         (void) zfs_add_sort_column(&sortcol, "name", B_FALSE);
2739
2740         cb.cb_sortcol = sortcol;
2741         cb.cb_numname = prtnum;
2742         cb.cb_nicenum = !parsable;
2743         cb.cb_avl_pool = avl_pool;
2744         cb.cb_avl = avl_tree;
2745         cb.cb_sid2posix = sid2posix;
2746
2747         for (i = 0; i < USFIELD_LAST; i++)
2748                 cb.cb_width[i] = strlen(gettext(us_field_hdr[i]));
2749
2750         for (p = 0; p < ZFS_NUM_USERQUOTA_PROPS; p++) {
2751                 if (((p == ZFS_PROP_USERUSED || p == ZFS_PROP_USERQUOTA) &&
2752                     !(types & (USTYPE_PSX_USR | USTYPE_SMB_USR))) ||
2753                     ((p == ZFS_PROP_GROUPUSED || p == ZFS_PROP_GROUPQUOTA) &&
2754                     !(types & (USTYPE_PSX_GRP | USTYPE_SMB_GRP))))
2755                         continue;
2756                 cb.cb_prop = p;
2757                 if ((ret = zfs_userspace(zhp, p, userspace_cb, &cb)) != 0)
2758                         return (ret);
2759         }
2760
2761         /* Sort the list */
2762         if ((node = uu_avl_first(avl_tree)) == NULL)
2763                 return (0);
2764
2765         us_populated = B_TRUE;
2766
2767         listpool = uu_list_pool_create("tmplist", sizeof (us_node_t),
2768             offsetof(us_node_t, usn_listnode), NULL, UU_DEFAULT);
2769         list = uu_list_create(listpool, NULL, UU_DEFAULT);
2770         uu_list_node_init(node, &node->usn_listnode, listpool);
2771
2772         while (node != NULL) {
2773                 rmnode = node;
2774                 node = uu_avl_next(avl_tree, node);
2775                 uu_avl_remove(avl_tree, rmnode);
2776                 if (uu_list_find(list, rmnode, NULL, &idx2) == NULL)
2777                         uu_list_insert(list, rmnode, idx2);
2778         }
2779
2780         for (node = uu_list_first(list); node != NULL;
2781             node = uu_list_next(list, node)) {
2782                 us_sort_info_t sortinfo = { sortcol, cb.cb_numname };
2783
2784                 if (uu_avl_find(avl_tree, node, &sortinfo, &idx) == NULL)
2785                         uu_avl_insert(avl_tree, node, idx);
2786         }
2787
2788         uu_list_destroy(list);
2789         uu_list_pool_destroy(listpool);
2790
2791         /* Print and free node nvlist memory */
2792         print_us(scripted, parsable, fields, types, cb.cb_width, B_TRUE,
2793             cb.cb_avl);
2794
2795         zfs_free_sort_columns(sortcol);
2796
2797         /* Clean up the AVL tree */
2798         if ((walk = uu_avl_walk_start(cb.cb_avl, UU_WALK_ROBUST)) == NULL)
2799                 nomem();
2800
2801         while ((node = uu_avl_walk_next(walk)) != NULL) {
2802                 uu_avl_remove(cb.cb_avl, node);
2803                 free(node);
2804         }
2805
2806         uu_avl_walk_end(walk);
2807         uu_avl_destroy(avl_tree);
2808         uu_avl_pool_destroy(avl_pool);
2809
2810         return (ret);
2811 }
2812
2813 /*
2814  * list [-r][-d max] [-H] [-o property[,property]...] [-t type[,type]...]
2815  *      [-s property [-s property]...] [-S property [-S property]...]
2816  *      <dataset> ...
2817  *
2818  *      -r      Recurse over all children
2819  *      -d      Limit recursion by depth.
2820  *      -H      Scripted mode; elide headers and separate columns by tabs
2821  *      -o      Control which fields to display.
2822  *      -t      Control which object types to display.
2823  *      -s      Specify sort columns, descending order.
2824  *      -S      Specify sort columns, ascending order.
2825  *
2826  * When given no arguments, lists all filesystems in the system.
2827  * Otherwise, list the specified datasets, optionally recursing down them if
2828  * '-r' is specified.
2829  */
2830 typedef struct list_cbdata {
2831         boolean_t       cb_first;
2832         boolean_t       cb_scripted;
2833         zprop_list_t    *cb_proplist;
2834 } list_cbdata_t;
2835
2836 /*
2837  * Given a list of columns to display, output appropriate headers for each one.
2838  */
2839 static void
2840 print_header(zprop_list_t *pl)
2841 {
2842         char headerbuf[ZFS_MAXPROPLEN];
2843         const char *header;
2844         int i;
2845         boolean_t first = B_TRUE;
2846         boolean_t right_justify;
2847
2848         for (; pl != NULL; pl = pl->pl_next) {
2849                 if (!first) {
2850                         (void) printf("  ");
2851                 } else {
2852                         first = B_FALSE;
2853                 }
2854
2855                 right_justify = B_FALSE;
2856                 if (pl->pl_prop != ZPROP_INVAL) {
2857                         header = zfs_prop_column_name(pl->pl_prop);
2858                         right_justify = zfs_prop_align_right(pl->pl_prop);
2859                 } else {
2860                         for (i = 0; pl->pl_user_prop[i] != '\0'; i++)
2861                                 headerbuf[i] = toupper(pl->pl_user_prop[i]);
2862                         headerbuf[i] = '\0';
2863                         header = headerbuf;
2864                 }
2865
2866                 if (pl->pl_next == NULL && !right_justify)
2867                         (void) printf("%s", header);
2868                 else if (right_justify)
2869                         (void) printf("%*s", pl->pl_width, header);
2870                 else
2871                         (void) printf("%-*s", pl->pl_width, header);
2872         }
2873
2874         (void) printf("\n");
2875 }
2876
2877 /*
2878  * Given a dataset and a list of fields, print out all the properties according
2879  * to the described layout.
2880  */
2881 static void
2882 print_dataset(zfs_handle_t *zhp, zprop_list_t *pl, boolean_t scripted)
2883 {
2884         boolean_t first = B_TRUE;
2885         char property[ZFS_MAXPROPLEN];
2886         nvlist_t *userprops = zfs_get_user_props(zhp);
2887         nvlist_t *propval;
2888         char *propstr;
2889         boolean_t right_justify;
2890         int width;
2891
2892         for (; pl != NULL; pl = pl->pl_next) {
2893                 if (!first) {
2894                         if (scripted)
2895                                 (void) printf("\t");
2896                         else
2897                                 (void) printf("  ");
2898                 } else {
2899                         first = B_FALSE;
2900                 }
2901
2902                 if (pl->pl_prop == ZFS_PROP_NAME) {
2903                         (void) strlcpy(property, zfs_get_name(zhp),
2904                             sizeof(property));
2905                         propstr = property;
2906                         right_justify = zfs_prop_align_right(pl->pl_prop);
2907                 } else if (pl->pl_prop != ZPROP_INVAL) {
2908                         if (zfs_prop_get(zhp, pl->pl_prop, property,
2909                             sizeof (property), NULL, NULL, 0, B_FALSE) != 0)
2910                                 propstr = "-";
2911                         else
2912                                 propstr = property;
2913
2914                         right_justify = zfs_prop_align_right(pl->pl_prop);
2915                 } else if (zfs_prop_userquota(pl->pl_user_prop)) {
2916                         if (zfs_prop_get_userquota(zhp, pl->pl_user_prop,
2917                             property, sizeof (property), B_FALSE) != 0)
2918                                 propstr = "-";
2919                         else
2920                                 propstr = property;
2921                         right_justify = B_TRUE;
2922                 } else if (zfs_prop_written(pl->pl_user_prop)) {
2923                         if (zfs_prop_get_written(zhp, pl->pl_user_prop,
2924                             property, sizeof (property), B_FALSE) != 0)
2925                                 propstr = "-";
2926                         else
2927                                 propstr = property;
2928                         right_justify = B_TRUE;
2929                 } else {
2930                         if (nvlist_lookup_nvlist(userprops,
2931                             pl->pl_user_prop, &propval) != 0)
2932                                 propstr = "-";
2933                         else
2934                                 verify(nvlist_lookup_string(propval,
2935                                     ZPROP_VALUE, &propstr) == 0);
2936                         right_justify = B_FALSE;
2937                 }
2938
2939                 width = pl->pl_width;
2940
2941                 /*
2942                  * If this is being called in scripted mode, or if this is the
2943                  * last column and it is left-justified, don't include a width
2944                  * format specifier.
2945                  */
2946                 if (scripted || (pl->pl_next == NULL && !right_justify))
2947                         (void) printf("%s", propstr);
2948                 else if (right_justify)
2949                         (void) printf("%*s", width, propstr);
2950                 else
2951                         (void) printf("%-*s", width, propstr);
2952         }
2953
2954         (void) printf("\n");
2955 }
2956
2957 /*
2958  * Generic callback function to list a dataset or snapshot.
2959  */
2960 static int
2961 list_callback(zfs_handle_t *zhp, void *data)
2962 {
2963         list_cbdata_t *cbp = data;
2964
2965         if (cbp->cb_first) {
2966                 if (!cbp->cb_scripted)
2967                         print_header(cbp->cb_proplist);
2968                 cbp->cb_first = B_FALSE;
2969         }
2970
2971         print_dataset(zhp, cbp->cb_proplist, cbp->cb_scripted);
2972
2973         return (0);
2974 }
2975
2976 static int
2977 zfs_do_list(int argc, char **argv)
2978 {
2979         int c;
2980         boolean_t scripted = B_FALSE;
2981         static char default_fields[] =
2982             "name,used,available,referenced,mountpoint";
2983         int types = ZFS_TYPE_DATASET;
2984         boolean_t types_specified = B_FALSE;
2985         char *fields = NULL;
2986         list_cbdata_t cb = { 0 };
2987         char *value;
2988         int limit = 0;
2989         int ret = 0;
2990         zfs_sort_column_t *sortcol = NULL;
2991         int flags = ZFS_ITER_PROP_LISTSNAPS | ZFS_ITER_ARGS_CAN_BE_PATHS;
2992
2993         /* check options */
2994         while ((c = getopt(argc, argv, ":d:o:rt:Hs:S:")) != -1) {
2995                 switch (c) {
2996                 case 'o':
2997                         fields = optarg;
2998                         break;
2999                 case 'd':
3000                         limit = parse_depth(optarg, &flags);
3001                         break;
3002                 case 'r':
3003                         flags |= ZFS_ITER_RECURSE;
3004                         break;
3005                 case 'H':
3006                         scripted = B_TRUE;
3007                         break;
3008                 case 's':
3009                         if (zfs_add_sort_column(&sortcol, optarg,
3010                             B_FALSE) != 0) {
3011                                 (void) fprintf(stderr,
3012                                     gettext("invalid property '%s'\n"), optarg);
3013                                 usage(B_FALSE);
3014                         }
3015                         break;
3016                 case 'S':
3017                         if (zfs_add_sort_column(&sortcol, optarg,
3018                             B_TRUE) != 0) {
3019                                 (void) fprintf(stderr,
3020                                     gettext("invalid property '%s'\n"), optarg);
3021                                 usage(B_FALSE);
3022                         }
3023                         break;
3024                 case 't':
3025                         types = 0;
3026                         types_specified = B_TRUE;
3027                         flags &= ~ZFS_ITER_PROP_LISTSNAPS;
3028                         while (*optarg != '\0') {
3029                                 static char *type_subopts[] = { "filesystem",
3030                                     "volume", "snapshot", "snap", "all", NULL };
3031
3032                                 switch (getsubopt(&optarg, type_subopts,
3033                                     &value)) {
3034                                 case 0:
3035                                         types |= ZFS_TYPE_FILESYSTEM;
3036                                         break;
3037                                 case 1:
3038                                         types |= ZFS_TYPE_VOLUME;
3039                                         break;
3040                                 case 2:
3041                                 case 3:
3042                                         types |= ZFS_TYPE_SNAPSHOT;
3043                                         break;
3044                                 case 4:
3045                                         types = ZFS_TYPE_DATASET;
3046                                         break;
3047
3048                                 default:
3049                                         (void) fprintf(stderr,
3050                                             gettext("invalid type '%s'\n"),
3051                                             value);
3052                                         usage(B_FALSE);
3053                                 }
3054                         }
3055                         break;
3056                 case ':':
3057                         (void) fprintf(stderr, gettext("missing argument for "
3058                             "'%c' option\n"), optopt);
3059                         usage(B_FALSE);
3060                         break;
3061                 case '?':
3062                         (void) fprintf(stderr, gettext("invalid option '%c'\n"),
3063                             optopt);
3064                         usage(B_FALSE);
3065                 }
3066         }
3067
3068         argc -= optind;
3069         argv += optind;
3070
3071         if (fields == NULL)
3072                 fields = default_fields;
3073
3074         /*
3075          * If we are only going to list snapshot names and sort by name,
3076          * then we can use faster version.
3077          */
3078         if (strcmp(fields, "name") == 0 && zfs_sort_only_by_name(sortcol))
3079                 flags |= ZFS_ITER_SIMPLE;
3080
3081         /*
3082          * If "-o space" and no types were specified, don't display snapshots.
3083          */
3084         if (strcmp(fields, "space") == 0 && types_specified == B_FALSE)
3085                 types &= ~ZFS_TYPE_SNAPSHOT;
3086
3087         /*
3088          * If the user specifies '-o all', the zprop_get_list() doesn't
3089          * normally include the name of the dataset.  For 'zfs list', we always
3090          * want this property to be first.
3091          */
3092         if (zprop_get_list(g_zfs, fields, &cb.cb_proplist, ZFS_TYPE_DATASET)
3093             != 0)
3094                 usage(B_FALSE);
3095
3096         cb.cb_scripted = scripted;
3097         cb.cb_first = B_TRUE;
3098
3099         ret = zfs_for_each(argc, argv, flags, types, sortcol, &cb.cb_proplist,
3100             limit, list_callback, &cb);
3101
3102         zprop_free_list(cb.cb_proplist);
3103         zfs_free_sort_columns(sortcol);
3104
3105         if (ret == 0 && cb.cb_first && !cb.cb_scripted)
3106                 (void) printf(gettext("no datasets available\n"));
3107
3108         return (ret);
3109 }
3110
3111 /*
3112  * zfs rename [-f] <fs | snap | vol> <fs | snap | vol>
3113  * zfs rename [-f] -p <fs | vol> <fs | vol>
3114  * zfs rename -r <snap> <snap>
3115  * zfs rename -u [-p] <fs> <fs>
3116  *
3117  * Renames the given dataset to another of the same type.
3118  *
3119  * The '-p' flag creates all the non-existing ancestors of the target first.
3120  */
3121 /* ARGSUSED */
3122 static int
3123 zfs_do_rename(int argc, char **argv)
3124 {
3125         zfs_handle_t *zhp;
3126         renameflags_t flags = { 0 };
3127         int c;
3128         int ret = 0;
3129         int types;
3130         boolean_t parents = B_FALSE;
3131         char *snapshot = NULL;
3132
3133         /* check options */
3134         while ((c = getopt(argc, argv, "fpru")) != -1) {
3135                 switch (c) {
3136                 case 'p':
3137                         parents = B_TRUE;
3138                         break;
3139                 case 'r':
3140                         flags.recurse = B_TRUE;
3141                         break;
3142                 case 'u':
3143                         flags.nounmount = B_TRUE;
3144                         break;
3145                 case 'f':
3146                         flags.forceunmount = B_TRUE;
3147                         break;
3148                 case '?':
3149                 default:
3150                         (void) fprintf(stderr, gettext("invalid option '%c'\n"),
3151                             optopt);
3152                         usage(B_FALSE);
3153                 }
3154         }
3155
3156         argc -= optind;
3157         argv += optind;
3158
3159         /* check number of arguments */
3160         if (argc < 1) {
3161                 (void) fprintf(stderr, gettext("missing source dataset "
3162                     "argument\n"));
3163                 usage(B_FALSE);
3164         }
3165         if (argc < 2) {
3166                 (void) fprintf(stderr, gettext("missing target dataset "
3167                     "argument\n"));
3168                 usage(B_FALSE);
3169         }
3170         if (argc > 2) {
3171                 (void) fprintf(stderr, gettext("too many arguments\n"));
3172                 usage(B_FALSE);
3173         }
3174
3175         if (flags.recurse && parents) {
3176                 (void) fprintf(stderr, gettext("-p and -r options are mutually "
3177                     "exclusive\n"));
3178                 usage(B_FALSE);
3179         }
3180
3181         if (flags.recurse && strchr(argv[0], '@') == 0) {
3182                 (void) fprintf(stderr, gettext("source dataset for recursive "
3183                     "rename must be a snapshot\n"));
3184                 usage(B_FALSE);
3185         }
3186
3187         if (flags.nounmount && parents) {
3188                 (void) fprintf(stderr, gettext("-u and -p options are mutually "
3189                     "exclusive\n"));
3190                 usage(B_FALSE);
3191         }
3192
3193         if (flags.nounmount)
3194                 types = ZFS_TYPE_FILESYSTEM;
3195         else if (parents)
3196                 types = ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME;
3197         else
3198                 types = ZFS_TYPE_DATASET;
3199
3200         if (flags.recurse) {
3201                 /*
3202                  * When we do recursive rename we are fine when the given
3203                  * snapshot for the given dataset doesn't exist - it can
3204                  * still exists below.
3205                  */
3206
3207                 snapshot = strchr(argv[0], '@');
3208                 assert(snapshot != NULL);
3209                 *snapshot = '\0';
3210                 snapshot++;
3211         }
3212
3213         if ((zhp = zfs_open(g_zfs, argv[0], types)) == NULL)
3214                 return (1);
3215
3216         /* If we were asked and the name looks good, try to create ancestors. */
3217         if (parents && zfs_name_valid(argv[1], zfs_get_type(zhp)) &&
3218             zfs_create_ancestors(g_zfs, argv[1]) != 0) {
3219                 zfs_close(zhp);
3220                 return (1);
3221         }
3222
3223         ret = (zfs_rename(zhp, snapshot, argv[1], flags) != 0);
3224
3225         zfs_close(zhp);
3226         return (ret);
3227 }
3228
3229 /*
3230  * zfs promote <fs>
3231  *
3232  * Promotes the given clone fs to be the parent
3233  */
3234 /* ARGSUSED */
3235 static int
3236 zfs_do_promote(int argc, char **argv)
3237 {
3238         zfs_handle_t *zhp;
3239         int ret = 0;
3240
3241         /* check options */
3242         if (argc > 1 && argv[1][0] == '-') {
3243                 (void) fprintf(stderr, gettext("invalid option '%c'\n"),
3244                     argv[1][1]);
3245                 usage(B_FALSE);
3246         }
3247
3248         /* check number of arguments */
3249         if (argc < 2) {
3250                 (void) fprintf(stderr, gettext("missing clone filesystem"
3251                     " argument\n"));
3252                 usage(B_FALSE);
3253         }
3254         if (argc > 2) {
3255                 (void) fprintf(stderr, gettext("too many arguments\n"));
3256                 usage(B_FALSE);
3257         }
3258
3259         zhp = zfs_open(g_zfs, argv[1], ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME);
3260         if (zhp == NULL)
3261                 return (1);
3262
3263         ret = (zfs_promote(zhp) != 0);
3264
3265
3266         zfs_close(zhp);
3267         return (ret);
3268 }
3269
3270 /*
3271  * zfs rollback [-rRf] <snapshot>
3272  *
3273  *      -r      Delete any intervening snapshots before doing rollback
3274  *      -R      Delete any snapshots and their clones
3275  *      -f      ignored for backwards compatability
3276  *
3277  * Given a filesystem, rollback to a specific snapshot, discarding any changes
3278  * since then and making it the active dataset.  If more recent snapshots exist,
3279  * the command will complain unless the '-r' flag is given.
3280  */
3281 typedef struct rollback_cbdata {
3282         uint64_t        cb_create;
3283         boolean_t       cb_first;
3284         int             cb_doclones;
3285         char            *cb_target;
3286         int             cb_error;
3287         boolean_t       cb_recurse;
3288         boolean_t       cb_dependent;
3289 } rollback_cbdata_t;
3290
3291 /*
3292  * Report any snapshots more recent than the one specified.  Used when '-r' is
3293  * not specified.  We reuse this same callback for the snapshot dependents - if
3294  * 'cb_dependent' is set, then this is a dependent and we should report it
3295  * without checking the transaction group.
3296  */
3297 static int
3298 rollback_check(zfs_handle_t *zhp, void *data)
3299 {
3300         rollback_cbdata_t *cbp = data;
3301
3302         if (cbp->cb_doclones) {
3303                 zfs_close(zhp);
3304                 return (0);
3305         }
3306
3307         if (!cbp->cb_dependent) {
3308                 if (strcmp(zfs_get_name(zhp), cbp->cb_target) != 0 &&
3309                     zfs_get_type(zhp) == ZFS_TYPE_SNAPSHOT &&
3310                     zfs_prop_get_int(zhp, ZFS_PROP_CREATETXG) >
3311                     cbp->cb_create) {
3312
3313                         if (cbp->cb_first && !cbp->cb_recurse) {
3314                                 (void) fprintf(stderr, gettext("cannot "
3315                                     "rollback to '%s': more recent snapshots "
3316                                     "exist\n"),
3317                                     cbp->cb_target);
3318                                 (void) fprintf(stderr, gettext("use '-r' to "
3319                                     "force deletion of the following "
3320                                     "snapshots:\n"));
3321                                 cbp->cb_first = 0;
3322                                 cbp->cb_error = 1;
3323                         }
3324
3325                         if (cbp->cb_recurse) {
3326                                 cbp->cb_dependent = B_TRUE;
3327                                 if (zfs_iter_dependents(zhp, B_TRUE,
3328                                     rollback_check, cbp) != 0) {
3329                                         zfs_close(zhp);
3330                                         return (-1);
3331                                 }
3332                                 cbp->cb_dependent = B_FALSE;
3333                         } else {
3334                                 (void) fprintf(stderr, "%s\n",
3335                                     zfs_get_name(zhp));
3336                         }
3337                 }
3338         } else {
3339                 if (cbp->cb_first && cbp->cb_recurse) {
3340                         (void) fprintf(stderr, gettext("cannot rollback to "
3341                             "'%s': clones of previous snapshots exist\n"),
3342                             cbp->cb_target);
3343                         (void) fprintf(stderr, gettext("use '-R' to "
3344                             "force deletion of the following clones and "
3345                             "dependents:\n"));
3346                         cbp->cb_first = 0;
3347                         cbp->cb_error = 1;
3348                 }
3349
3350                 (void) fprintf(stderr, "%s\n", zfs_get_name(zhp));
3351         }
3352
3353         zfs_close(zhp);
3354         return (0);
3355 }
3356
3357 static int
3358 zfs_do_rollback(int argc, char **argv)
3359 {
3360         int ret = 0;
3361         int c;
3362         boolean_t force = B_FALSE;
3363         rollback_cbdata_t cb = { 0 };
3364         zfs_handle_t *zhp, *snap;
3365         char parentname[ZFS_MAXNAMELEN];
3366         char *delim;
3367
3368         /* check options */
3369         while ((c = getopt(argc, argv, "rRf")) != -1) {
3370                 switch (c) {
3371                 case 'r':
3372                         cb.cb_recurse = 1;
3373                         break;
3374                 case 'R':
3375                         cb.cb_recurse = 1;
3376                         cb.cb_doclones = 1;
3377                         break;
3378                 case 'f':
3379                         force = B_TRUE;
3380                         break;
3381                 case '?':
3382                         (void) fprintf(stderr, gettext("invalid option '%c'\n"),
3383                             optopt);
3384                         usage(B_FALSE);
3385                 }
3386         }
3387
3388         argc -= optind;
3389         argv += optind;
3390
3391         /* check number of arguments */
3392         if (argc < 1) {
3393                 (void) fprintf(stderr, gettext("missing dataset argument\n"));
3394                 usage(B_FALSE);
3395         }
3396         if (argc > 1) {
3397                 (void) fprintf(stderr, gettext("too many arguments\n"));
3398                 usage(B_FALSE);
3399         }
3400
3401         /* open the snapshot */
3402         if ((snap = zfs_open(g_zfs, argv[0], ZFS_TYPE_SNAPSHOT)) == NULL)
3403                 return (1);
3404
3405         /* open the parent dataset */
3406         (void) strlcpy(parentname, argv[0], sizeof (parentname));
3407         verify((delim = strrchr(parentname, '@')) != NULL);
3408         *delim = '\0';
3409         if ((zhp = zfs_open(g_zfs, parentname, ZFS_TYPE_DATASET)) == NULL) {
3410                 zfs_close(snap);
3411                 return (1);
3412         }
3413
3414         /*
3415          * Check for more recent snapshots and/or clones based on the presence
3416          * of '-r' and '-R'.
3417          */
3418         cb.cb_target = argv[0];
3419         cb.cb_create = zfs_prop_get_int(snap, ZFS_PROP_CREATETXG);
3420         cb.cb_first = B_TRUE;
3421         cb.cb_error = 0;
3422         if ((ret = zfs_iter_children(zhp, rollback_check, &cb)) != 0)
3423                 goto out;
3424
3425         if ((ret = cb.cb_error) != 0)
3426                 goto out;
3427
3428         /*
3429          * Rollback parent to the given snapshot.
3430          */
3431         ret = zfs_rollback(zhp, snap, force);
3432
3433 out:
3434         zfs_close(snap);
3435         zfs_close(zhp);
3436
3437         if (ret == 0)
3438                 return (0);
3439         else
3440                 return (1);
3441 }
3442
3443 /*
3444  * zfs set property=value { fs | snap | vol } ...
3445  *
3446  * Sets the given property for all datasets specified on the command line.
3447  */
3448 typedef struct set_cbdata {
3449         char            *cb_propname;
3450         char            *cb_value;
3451 } set_cbdata_t;
3452
3453 static int
3454 set_callback(zfs_handle_t *zhp, void *data)
3455 {
3456         set_cbdata_t *cbp = data;
3457
3458         if (zfs_prop_set(zhp, cbp->cb_propname, cbp->cb_value) != 0) {
3459                 switch (libzfs_errno(g_zfs)) {
3460                 case EZFS_MOUNTFAILED:
3461                         (void) fprintf(stderr, gettext("property may be set "
3462                             "but unable to remount filesystem\n"));
3463                         break;
3464                 case EZFS_SHARENFSFAILED:
3465                         (void) fprintf(stderr, gettext("property may be set "
3466                             "but unable to reshare filesystem\n"));
3467                         break;
3468                 }
3469                 return (1);
3470         }
3471         return (0);
3472 }
3473
3474 static int
3475 zfs_do_set(int argc, char **argv)
3476 {
3477         set_cbdata_t cb;
3478         int ret = 0;
3479
3480         /* check for options */
3481         if (argc > 1 && argv[1][0] == '-') {
3482                 (void) fprintf(stderr, gettext("invalid option '%c'\n"),
3483                     argv[1][1]);
3484                 usage(B_FALSE);
3485         }
3486
3487         /* check number of arguments */
3488         if (argc < 2) {
3489                 (void) fprintf(stderr, gettext("missing property=value "
3490                     "argument\n"));
3491                 usage(B_FALSE);
3492         }
3493         if (argc < 3) {
3494                 (void) fprintf(stderr, gettext("missing dataset name\n"));
3495                 usage(B_FALSE);
3496         }
3497
3498         /* validate property=value argument */
3499         cb.cb_propname = argv[1];
3500         if (((cb.cb_value = strchr(cb.cb_propname, '=')) == NULL) ||
3501             (cb.cb_value[1] == '\0')) {
3502                 (void) fprintf(stderr, gettext("missing value in "
3503                     "property=value argument\n"));
3504                 usage(B_FALSE);
3505         }
3506
3507         *cb.cb_value = '\0';
3508         cb.cb_value++;
3509
3510         if (*cb.cb_propname == '\0') {
3511                 (void) fprintf(stderr,
3512                     gettext("missing property in property=value argument\n"));
3513                 usage(B_FALSE);
3514         }
3515
3516         ret = zfs_for_each(argc - 2, argv + 2, 0,
3517             ZFS_TYPE_DATASET, NULL, NULL, 0, set_callback, &cb);
3518
3519         return (ret);
3520 }
3521
3522 typedef struct snap_cbdata {
3523         nvlist_t *sd_nvl;
3524         boolean_t sd_recursive;
3525         const char *sd_snapname;
3526 } snap_cbdata_t;
3527
3528 static int
3529 zfs_snapshot_cb(zfs_handle_t *zhp, void *arg)
3530 {
3531         snap_cbdata_t *sd = arg;
3532         char *name;
3533         int rv = 0;
3534         int error;
3535
3536         if (sd->sd_recursive &&
3537             zfs_prop_get_int(zhp, ZFS_PROP_INCONSISTENT) != 0) {
3538                 zfs_close(zhp);
3539                 return (0);
3540         }
3541
3542         error = asprintf(&name, "%s@%s", zfs_get_name(zhp), sd->sd_snapname);
3543         if (error == -1)
3544                 nomem();
3545         fnvlist_add_boolean(sd->sd_nvl, name);
3546         free(name);
3547
3548         if (sd->sd_recursive)
3549                 rv = zfs_iter_filesystems(zhp, zfs_snapshot_cb, sd);
3550         zfs_close(zhp);
3551         return (rv);
3552 }
3553
3554 /*
3555  * zfs snapshot [-r] [-o prop=value] ... <fs@snap>
3556  *
3557  * Creates a snapshot with the given name.  While functionally equivalent to
3558  * 'zfs create', it is a separate command to differentiate intent.
3559  */
3560 static int
3561 zfs_do_snapshot(int argc, char **argv)
3562 {
3563         int ret = 0;
3564         int c;
3565         nvlist_t *props;
3566         snap_cbdata_t sd = { 0 };
3567         boolean_t multiple_snaps = B_FALSE;
3568
3569         if (nvlist_alloc(&props, NV_UNIQUE_NAME, 0) != 0)
3570                 nomem();
3571         if (nvlist_alloc(&sd.sd_nvl, NV_UNIQUE_NAME, 0) != 0)
3572                 nomem();
3573
3574         /* check options */
3575         while ((c = getopt(argc, argv, "ro:")) != -1) {
3576                 switch (c) {
3577                 case 'o':
3578                         if (parseprop(props))
3579                                 return (1);
3580                         break;
3581                 case 'r':
3582                         sd.sd_recursive = B_TRUE;
3583                         multiple_snaps = B_TRUE;
3584                         break;
3585                 case '?':
3586                         (void) fprintf(stderr, gettext("invalid option '%c'\n"),
3587                             optopt);
3588                         goto usage;
3589                 }
3590         }
3591
3592         argc -= optind;
3593         argv += optind;
3594
3595         /* check number of arguments */
3596         if (argc < 1) {
3597                 (void) fprintf(stderr, gettext("missing snapshot argument\n"));
3598                 goto usage;
3599         }
3600
3601         if (argc > 1)
3602                 multiple_snaps = B_TRUE;
3603         for (; argc > 0; argc--, argv++) {
3604                 char *atp;
3605                 zfs_handle_t *zhp;
3606
3607                 atp = strchr(argv[0], '@');
3608                 if (atp == NULL)
3609                         goto usage;
3610                 *atp = '\0';
3611                 sd.sd_snapname = atp + 1;
3612                 zhp = zfs_open(g_zfs, argv[0],
3613                     ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME);
3614                 if (zhp == NULL)
3615                         goto usage;
3616                 if (zfs_snapshot_cb(zhp, &sd) != 0)
3617                         goto usage;
3618         }
3619
3620         ret = zfs_snapshot_nvl(g_zfs, sd.sd_nvl, props);
3621         nvlist_free(sd.sd_nvl);
3622         nvlist_free(props);
3623         if (ret != 0 && multiple_snaps)
3624                 (void) fprintf(stderr, gettext("no snapshots were created\n"));
3625         return (ret != 0);
3626
3627 usage:
3628         nvlist_free(sd.sd_nvl);
3629         nvlist_free(props);
3630         usage(B_FALSE);
3631         return (-1);
3632 }
3633
3634 /*
3635  * Send a backup stream to stdout.
3636  */
3637 static int
3638 zfs_do_send(int argc, char **argv)
3639 {
3640         char *fromname = NULL;
3641         char *toname = NULL;
3642         char *cp;
3643         zfs_handle_t *zhp;
3644         sendflags_t flags = { 0 };
3645         int c, err;
3646         nvlist_t *dbgnv = NULL;
3647         boolean_t extraverbose = B_FALSE;
3648
3649         /* check options */
3650         while ((c = getopt(argc, argv, ":i:I:RDpvnP")) != -1) {
3651                 switch (c) {
3652                 case 'i':
3653                         if (fromname)
3654                                 usage(B_FALSE);
3655                         fromname = optarg;
3656                         break;
3657                 case 'I':
3658                         if (fromname)
3659                                 usage(B_FALSE);
3660                         fromname = optarg;
3661                         flags.doall = B_TRUE;
3662                         break;
3663                 case 'R':
3664                         flags.replicate = B_TRUE;
3665                         break;
3666                 case 'p':
3667                         flags.props = B_TRUE;
3668                         break;
3669                 case 'P':
3670                         flags.parsable = B_TRUE;
3671                         flags.verbose = B_TRUE;
3672                         break;
3673                 case 'v':
3674                         if (flags.verbose)
3675                                 extraverbose = B_TRUE;
3676                         flags.verbose = B_TRUE;
3677                         flags.progress = B_TRUE;
3678                         break;
3679                 case 'D':
3680                         flags.dedup = B_TRUE;
3681                         break;
3682                 case 'n':
3683                         flags.dryrun = B_TRUE;
3684                         break;
3685                 case ':':
3686                         (void) fprintf(stderr, gettext("missing argument for "
3687                             "'%c' option\n"), optopt);
3688                         usage(B_FALSE);
3689                         break;
3690                 case '?':
3691                         (void) fprintf(stderr, gettext("invalid option '%c'\n"),
3692                             optopt);
3693                         usage(B_FALSE);
3694                 }
3695         }
3696
3697         argc -= optind;
3698         argv += optind;
3699
3700         /* check number of arguments */
3701         if (argc < 1) {
3702                 (void) fprintf(stderr, gettext("missing snapshot argument\n"));
3703                 usage(B_FALSE);
3704         }
3705         if (argc > 1) {
3706                 (void) fprintf(stderr, gettext("too many arguments\n"));
3707                 usage(B_FALSE);
3708         }
3709
3710         if (!flags.dryrun && isatty(STDOUT_FILENO)) {
3711                 (void) fprintf(stderr,
3712                     gettext("Error: Stream can not be written to a terminal.\n"
3713                     "You must redirect standard output.\n"));
3714                 return (1);
3715         }
3716
3717         cp = strchr(argv[0], '@');
3718         if (cp == NULL) {
3719                 (void) fprintf(stderr,
3720                     gettext("argument must be a snapshot\n"));
3721                 usage(B_FALSE);
3722         }
3723         *cp = '\0';
3724         toname = cp + 1;
3725         zhp = zfs_open(g_zfs, argv[0], ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME);
3726         if (zhp == NULL)
3727                 return (1);
3728
3729         /*
3730          * If they specified the full path to the snapshot, chop off
3731          * everything except the short name of the snapshot, but special
3732          * case if they specify the origin.
3733          */
3734         if (fromname && (cp = strchr(fromname, '@')) != NULL) {
3735                 char origin[ZFS_MAXNAMELEN];
3736                 zprop_source_t src;
3737
3738                 (void) zfs_prop_get(zhp, ZFS_PROP_ORIGIN,
3739                     origin, sizeof (origin), &src, NULL, 0, B_FALSE);
3740
3741                 if (strcmp(origin, fromname) == 0) {
3742                         fromname = NULL;
3743                         flags.fromorigin = B_TRUE;
3744                 } else {
3745                         *cp = '\0';
3746                         if (cp != fromname && strcmp(argv[0], fromname)) {
3747                                 (void) fprintf(stderr,
3748                                     gettext("incremental source must be "
3749                                     "in same filesystem\n"));
3750                                 usage(B_FALSE);
3751                         }
3752                         fromname = cp + 1;
3753                         if (strchr(fromname, '@') || strchr(fromname, '/')) {
3754                                 (void) fprintf(stderr,
3755                                     gettext("invalid incremental source\n"));
3756                                 usage(B_FALSE);
3757                         }
3758                 }
3759         }
3760
3761         if (flags.replicate && fromname == NULL)
3762                 flags.doall = B_TRUE;
3763
3764         err = zfs_send(zhp, fromname, toname, &flags, STDOUT_FILENO, NULL, 0,
3765             extraverbose ? &dbgnv : NULL);
3766
3767         if (extraverbose && dbgnv != NULL) {
3768                 /*
3769                  * dump_nvlist prints to stdout, but that's been
3770                  * redirected to a file.  Make it print to stderr
3771                  * instead.
3772                  */
3773                 (void) dup2(STDERR_FILENO, STDOUT_FILENO);
3774                 dump_nvlist(dbgnv, 0);
3775                 nvlist_free(dbgnv);
3776         }
3777         zfs_close(zhp);
3778
3779         return (err != 0);
3780 }
3781
3782 /*
3783  * zfs receive [-vnFu] [-d | -e] <fs@snap>
3784  *
3785  * Restore a backup stream from stdin.
3786  */
3787 static int
3788 zfs_do_receive(int argc, char **argv)
3789 {
3790         int c, err;
3791         recvflags_t flags = { 0 };
3792
3793         /* check options */
3794         while ((c = getopt(argc, argv, ":denuvF")) != -1) {
3795                 switch (c) {
3796                 case 'd':
3797                         flags.isprefix = B_TRUE;
3798                         break;
3799                 case 'e':
3800                         flags.isprefix = B_TRUE;
3801                         flags.istail = B_TRUE;
3802                         break;
3803                 case 'n':
3804                         flags.dryrun = B_TRUE;
3805                         break;
3806                 case 'u':
3807                         flags.nomount = B_TRUE;
3808                         break;
3809                 case 'v':
3810                         flags.verbose = B_TRUE;
3811                         break;
3812                 case 'F':
3813                         flags.force = B_TRUE;
3814                         break;
3815                 case ':':
3816                         (void) fprintf(stderr, gettext("missing argument for "
3817                             "'%c' option\n"), optopt);
3818                         usage(B_FALSE);
3819                         break;
3820                 case '?':
3821                         (void) fprintf(stderr, gettext("invalid option '%c'\n"),
3822                             optopt);
3823                         usage(B_FALSE);
3824                 }
3825         }
3826
3827         argc -= optind;
3828         argv += optind;
3829
3830         /* check number of arguments */
3831         if (argc < 1) {
3832                 (void) fprintf(stderr, gettext("missing snapshot argument\n"));
3833                 usage(B_FALSE);
3834         }
3835         if (argc > 1) {
3836                 (void) fprintf(stderr, gettext("too many arguments\n"));
3837                 usage(B_FALSE);
3838         }
3839
3840         if (isatty(STDIN_FILENO)) {
3841                 (void) fprintf(stderr,
3842                     gettext("Error: Backup stream can not be read "
3843                     "from a terminal.\n"
3844                     "You must redirect standard input.\n"));
3845                 return (1);
3846         }
3847
3848         err = zfs_receive(g_zfs, argv[0], &flags, STDIN_FILENO, NULL);
3849
3850         return (err != 0);
3851 }
3852
3853 /*
3854  * allow/unallow stuff
3855  */
3856 /* copied from zfs/sys/dsl_deleg.h */
3857 #define ZFS_DELEG_PERM_CREATE           "create"
3858 #define ZFS_DELEG_PERM_DESTROY          "destroy"
3859 #define ZFS_DELEG_PERM_SNAPSHOT         "snapshot"
3860 #define ZFS_DELEG_PERM_ROLLBACK         "rollback"
3861 #define ZFS_DELEG_PERM_CLONE            "clone"
3862 #define ZFS_DELEG_PERM_PROMOTE          "promote"
3863 #define ZFS_DELEG_PERM_RENAME           "rename"
3864 #define ZFS_DELEG_PERM_MOUNT            "mount"
3865 #define ZFS_DELEG_PERM_SHARE            "share"
3866 #define ZFS_DELEG_PERM_SEND             "send"
3867 #define ZFS_DELEG_PERM_RECEIVE          "receive"
3868 #define ZFS_DELEG_PERM_ALLOW            "allow"
3869 #define ZFS_DELEG_PERM_USERPROP         "userprop"
3870 #define ZFS_DELEG_PERM_VSCAN            "vscan" /* ??? */
3871 #define ZFS_DELEG_PERM_USERQUOTA        "userquota"
3872 #define ZFS_DELEG_PERM_GROUPQUOTA       "groupquota"
3873 #define ZFS_DELEG_PERM_USERUSED         "userused"
3874 #define ZFS_DELEG_PERM_GROUPUSED        "groupused"
3875 #define ZFS_DELEG_PERM_HOLD             "hold"
3876 #define ZFS_DELEG_PERM_RELEASE          "release"
3877 #define ZFS_DELEG_PERM_DIFF             "diff"
3878
3879 #define ZFS_NUM_DELEG_NOTES ZFS_DELEG_NOTE_NONE
3880
3881 static zfs_deleg_perm_tab_t zfs_deleg_perm_tbl[] = {
3882         { ZFS_DELEG_PERM_ALLOW, ZFS_DELEG_NOTE_ALLOW },
3883         { ZFS_DELEG_PERM_CLONE, ZFS_DELEG_NOTE_CLONE },
3884         { ZFS_DELEG_PERM_CREATE, ZFS_DELEG_NOTE_CREATE },
3885         { ZFS_DELEG_PERM_DESTROY, ZFS_DELEG_NOTE_DESTROY },
3886         { ZFS_DELEG_PERM_DIFF, ZFS_DELEG_NOTE_DIFF},
3887         { ZFS_DELEG_PERM_HOLD, ZFS_DELEG_NOTE_HOLD },
3888         { ZFS_DELEG_PERM_MOUNT, ZFS_DELEG_NOTE_MOUNT },
3889         { ZFS_DELEG_PERM_PROMOTE, ZFS_DELEG_NOTE_PROMOTE },
3890         { ZFS_DELEG_PERM_RECEIVE, ZFS_DELEG_NOTE_RECEIVE },
3891         { ZFS_DELEG_PERM_RELEASE, ZFS_DELEG_NOTE_RELEASE },
3892         { ZFS_DELEG_PERM_RENAME, ZFS_DELEG_NOTE_RENAME },
3893         { ZFS_DELEG_PERM_ROLLBACK, ZFS_DELEG_NOTE_ROLLBACK },
3894         { ZFS_DELEG_PERM_SEND, ZFS_DELEG_NOTE_SEND },
3895         { ZFS_DELEG_PERM_SHARE, ZFS_DELEG_NOTE_SHARE },
3896         { ZFS_DELEG_PERM_SNAPSHOT, ZFS_DELEG_NOTE_SNAPSHOT },
3897
3898         { ZFS_DELEG_PERM_GROUPQUOTA, ZFS_DELEG_NOTE_GROUPQUOTA },
3899         { ZFS_DELEG_PERM_GROUPUSED, ZFS_DELEG_NOTE_GROUPUSED },
3900         { ZFS_DELEG_PERM_USERPROP, ZFS_DELEG_NOTE_USERPROP },
3901         { ZFS_DELEG_PERM_USERQUOTA, ZFS_DELEG_NOTE_USERQUOTA },
3902         { ZFS_DELEG_PERM_USERUSED, ZFS_DELEG_NOTE_USERUSED },
3903         { NULL, ZFS_DELEG_NOTE_NONE }
3904 };
3905
3906 /* permission structure */
3907 typedef struct deleg_perm {
3908         zfs_deleg_who_type_t    dp_who_type;
3909         const char              *dp_name;
3910         boolean_t               dp_local;
3911         boolean_t               dp_descend;
3912 } deleg_perm_t;
3913
3914 /* */
3915 typedef struct deleg_perm_node {
3916         deleg_perm_t            dpn_perm;
3917
3918         uu_avl_node_t           dpn_avl_node;
3919 } deleg_perm_node_t;
3920
3921 typedef struct fs_perm fs_perm_t;
3922
3923 /* permissions set */
3924 typedef struct who_perm {
3925         zfs_deleg_who_type_t    who_type;
3926         const char              *who_name;              /* id */
3927         char                    who_ug_name[256];       /* user/group name */
3928         fs_perm_t               *who_fsperm;            /* uplink */
3929
3930         uu_avl_t                *who_deleg_perm_avl;    /* permissions */
3931 } who_perm_t;
3932
3933 /* */
3934 typedef struct who_perm_node {
3935         who_perm_t      who_perm;
3936         uu_avl_node_t   who_avl_node;
3937 } who_perm_node_t;
3938
3939 typedef struct fs_perm_set fs_perm_set_t;
3940 /* fs permissions */
3941 struct fs_perm {
3942         const char              *fsp_name;
3943
3944         uu_avl_t                *fsp_sc_avl;    /* sets,create */
3945         uu_avl_t                *fsp_uge_avl;   /* user,group,everyone */
3946
3947         fs_perm_set_t           *fsp_set;       /* uplink */
3948 };
3949
3950 /* */
3951 typedef struct fs_perm_node {
3952         fs_perm_t       fspn_fsperm;
3953         uu_avl_t        *fspn_avl;
3954
3955         uu_list_node_t  fspn_list_node;
3956 } fs_perm_node_t;
3957
3958 /* top level structure */
3959 struct fs_perm_set {
3960         uu_list_pool_t  *fsps_list_pool;
3961         uu_list_t       *fsps_list; /* list of fs_perms */
3962
3963         uu_avl_pool_t   *fsps_named_set_avl_pool;
3964         uu_avl_pool_t   *fsps_who_perm_avl_pool;
3965         uu_avl_pool_t   *fsps_deleg_perm_avl_pool;
3966 };
3967
3968 static inline const char *
3969 deleg_perm_type(zfs_deleg_note_t note)
3970 {
3971         /* subcommands */
3972         switch (note) {
3973                 /* SUBCOMMANDS */
3974                 /* OTHER */
3975         case ZFS_DELEG_NOTE_GROUPQUOTA:
3976         case ZFS_DELEG_NOTE_GROUPUSED:
3977         case ZFS_DELEG_NOTE_USERPROP:
3978         case ZFS_DELEG_NOTE_USERQUOTA:
3979         case ZFS_DELEG_NOTE_USERUSED:
3980                 /* other */
3981                 return (gettext("other"));
3982         default:
3983                 return (gettext("subcommand"));
3984         }
3985 }
3986
3987 static int inline
3988 who_type2weight(zfs_deleg_who_type_t who_type)
3989 {
3990         int res;
3991         switch (who_type) {
3992                 case ZFS_DELEG_NAMED_SET_SETS:
3993                 case ZFS_DELEG_NAMED_SET:
3994                         res = 0;
3995                         break;
3996                 case ZFS_DELEG_CREATE_SETS:
3997                 case ZFS_DELEG_CREATE:
3998                         res = 1;
3999                         break;
4000                 case ZFS_DELEG_USER_SETS:
4001                 case ZFS_DELEG_USER:
4002                         res = 2;
4003                         break;
4004                 case ZFS_DELEG_GROUP_SETS:
4005                 case ZFS_DELEG_GROUP:
4006                         res = 3;
4007                         break;
4008                 case ZFS_DELEG_EVERYONE_SETS:
4009                 case ZFS_DELEG_EVERYONE:
4010                         res = 4;
4011                         break;
4012                 default:
4013                         res = -1;
4014         }
4015
4016         return (res);
4017 }
4018
4019 /* ARGSUSED */
4020 static int
4021 who_perm_compare(const void *larg, const void *rarg, void *unused)
4022 {
4023         const who_perm_node_t *l = larg;
4024         const who_perm_node_t *r = rarg;
4025         zfs_deleg_who_type_t ltype = l->who_perm.who_type;
4026         zfs_deleg_who_type_t rtype = r->who_perm.who_type;
4027         int lweight = who_type2weight(ltype);
4028         int rweight = who_type2weight(rtype);
4029         int res = lweight - rweight;
4030         if (res == 0)
4031                 res = strncmp(l->who_perm.who_name, r->who_perm.who_name,
4032                     ZFS_MAX_DELEG_NAME-1);
4033
4034         if (res == 0)
4035                 return (0);
4036         if (res > 0)
4037                 return (1);
4038         else
4039                 return (-1);
4040 }
4041
4042 /* ARGSUSED */
4043 static int
4044 deleg_perm_compare(const void *larg, const void *rarg, void *unused)
4045 {
4046         const deleg_perm_node_t *l = larg;
4047         const deleg_perm_node_t *r = rarg;
4048         int res =  strncmp(l->dpn_perm.dp_name, r->dpn_perm.dp_name,
4049             ZFS_MAX_DELEG_NAME-1);
4050
4051         if (res == 0)
4052                 return (0);
4053
4054         if (res > 0)
4055                 return (1);
4056         else
4057                 return (-1);
4058 }
4059
4060 static inline void
4061 fs_perm_set_init(fs_perm_set_t *fspset)
4062 {
4063         bzero(fspset, sizeof (fs_perm_set_t));
4064
4065         if ((fspset->fsps_list_pool = uu_list_pool_create("fsps_list_pool",
4066             sizeof (fs_perm_node_t), offsetof(fs_perm_node_t, fspn_list_node),
4067             NULL, UU_DEFAULT)) == NULL)
4068                 nomem();
4069         if ((fspset->fsps_list = uu_list_create(fspset->fsps_list_pool, NULL,
4070             UU_DEFAULT)) == NULL)
4071                 nomem();
4072
4073         if ((fspset->fsps_named_set_avl_pool = uu_avl_pool_create(
4074             "named_set_avl_pool", sizeof (who_perm_node_t), offsetof(
4075             who_perm_node_t, who_avl_node), who_perm_compare,
4076             UU_DEFAULT)) == NULL)
4077                 nomem();
4078
4079         if ((fspset->fsps_who_perm_avl_pool = uu_avl_pool_create(
4080             "who_perm_avl_pool", sizeof (who_perm_node_t), offsetof(
4081             who_perm_node_t, who_avl_node), who_perm_compare,
4082             UU_DEFAULT)) == NULL)
4083                 nomem();
4084
4085         if ((fspset->fsps_deleg_perm_avl_pool = uu_avl_pool_create(
4086             "deleg_perm_avl_pool", sizeof (deleg_perm_node_t), offsetof(
4087             deleg_perm_node_t, dpn_avl_node), deleg_perm_compare, UU_DEFAULT))
4088             == NULL)
4089                 nomem();
4090 }
4091
4092 static inline void fs_perm_fini(fs_perm_t *);
4093 static inline void who_perm_fini(who_perm_t *);
4094
4095 static inline void
4096 fs_perm_set_fini(fs_perm_set_t *fspset)
4097 {
4098         fs_perm_node_t *node = uu_list_first(fspset->fsps_list);
4099
4100         while (node != NULL) {
4101                 fs_perm_node_t *next_node =
4102                     uu_list_next(fspset->fsps_list, node);
4103                 fs_perm_t *fsperm = &node->fspn_fsperm;
4104                 fs_perm_fini(fsperm);
4105                 uu_list_remove(fspset->fsps_list, node);
4106                 free(node);
4107                 node = next_node;
4108         }
4109
4110         uu_avl_pool_destroy(fspset->fsps_named_set_avl_pool);
4111         uu_avl_pool_destroy(fspset->fsps_who_perm_avl_pool);
4112         uu_avl_pool_destroy(fspset->fsps_deleg_perm_avl_pool);
4113 }
4114
4115 static inline void
4116 deleg_perm_init(deleg_perm_t *deleg_perm, zfs_deleg_who_type_t type,
4117     const char *name)
4118 {
4119         deleg_perm->dp_who_type = type;
4120         deleg_perm->dp_name = name;
4121 }
4122
4123 static inline void
4124 who_perm_init(who_perm_t *who_perm, fs_perm_t *fsperm,
4125     zfs_deleg_who_type_t type, const char *name)
4126 {
4127         uu_avl_pool_t   *pool;
4128         pool = fsperm->fsp_set->fsps_deleg_perm_avl_pool;
4129
4130         bzero(who_perm, sizeof (who_perm_t));
4131
4132         if ((who_perm->who_deleg_perm_avl = uu_avl_create(pool, NULL,
4133             UU_DEFAULT)) == NULL)
4134                 nomem();
4135
4136         who_perm->who_type = type;
4137         who_perm->who_name = name;
4138         who_perm->who_fsperm = fsperm;
4139 }
4140
4141 static inline void
4142 who_perm_fini(who_perm_t *who_perm)
4143 {
4144         deleg_perm_node_t *node = uu_avl_first(who_perm->who_deleg_perm_avl);
4145
4146         while (node != NULL) {
4147                 deleg_perm_node_t *next_node =
4148                     uu_avl_next(who_perm->who_deleg_perm_avl, node);
4149
4150                 uu_avl_remove(who_perm->who_deleg_perm_avl, node);
4151                 free(node);
4152                 node = next_node;
4153         }
4154
4155         uu_avl_destroy(who_perm->who_deleg_perm_avl);
4156 }
4157
4158 static inline void
4159 fs_perm_init(fs_perm_t *fsperm, fs_perm_set_t *fspset, const char *fsname)
4160 {
4161         uu_avl_pool_t   *nset_pool = fspset->fsps_named_set_avl_pool;
4162         uu_avl_pool_t   *who_pool = fspset->fsps_who_perm_avl_pool;
4163
4164         bzero(fsperm, sizeof (fs_perm_t));
4165
4166         if ((fsperm->fsp_sc_avl = uu_avl_create(nset_pool, NULL, UU_DEFAULT))
4167             == NULL)
4168                 nomem();
4169
4170         if ((fsperm->fsp_uge_avl = uu_avl_create(who_pool, NULL, UU_DEFAULT))
4171             == NULL)
4172                 nomem();
4173
4174         fsperm->fsp_set = fspset;
4175         fsperm->fsp_name = fsname;
4176 }
4177
4178 static inline void
4179 fs_perm_fini(fs_perm_t *fsperm)
4180 {
4181         who_perm_node_t *node = uu_avl_first(fsperm->fsp_sc_avl);
4182         while (node != NULL) {
4183                 who_perm_node_t *next_node = uu_avl_next(fsperm->fsp_sc_avl,
4184                     node);
4185                 who_perm_t *who_perm = &node->who_perm;
4186                 who_perm_fini(who_perm);
4187                 uu_avl_remove(fsperm->fsp_sc_avl, node);
4188                 free(node);
4189                 node = next_node;
4190         }
4191
4192         node = uu_avl_first(fsperm->fsp_uge_avl);
4193         while (node != NULL) {
4194                 who_perm_node_t *next_node = uu_avl_next(fsperm->fsp_uge_avl,
4195                     node);
4196                 who_perm_t *who_perm = &node->who_perm;
4197                 who_perm_fini(who_perm);
4198                 uu_avl_remove(fsperm->fsp_uge_avl, node);
4199                 free(node);
4200                 node = next_node;
4201         }
4202
4203         uu_avl_destroy(fsperm->fsp_sc_avl);
4204         uu_avl_destroy(fsperm->fsp_uge_avl);
4205 }
4206
4207 static void inline
4208 set_deleg_perm_node(uu_avl_t *avl, deleg_perm_node_t *node,
4209     zfs_deleg_who_type_t who_type, const char *name, char locality)
4210 {
4211         uu_avl_index_t idx = 0;
4212
4213         deleg_perm_node_t *found_node = NULL;
4214         deleg_perm_t    *deleg_perm = &node->dpn_perm;
4215
4216         deleg_perm_init(deleg_perm, who_type, name);
4217
4218         if ((found_node = uu_avl_find(avl, node, NULL, &idx))
4219             == NULL)
4220                 uu_avl_insert(avl, node, idx);
4221         else {
4222                 node = found_node;
4223                 deleg_perm = &node->dpn_perm;
4224         }
4225
4226
4227         switch (locality) {
4228         case ZFS_DELEG_LOCAL:
4229                 deleg_perm->dp_local = B_TRUE;
4230                 break;
4231         case ZFS_DELEG_DESCENDENT:
4232                 deleg_perm->dp_descend = B_TRUE;
4233                 break;
4234         case ZFS_DELEG_NA:
4235                 break;
4236         default:
4237                 assert(B_FALSE); /* invalid locality */
4238         }
4239 }
4240
4241 static inline int
4242 parse_who_perm(who_perm_t *who_perm, nvlist_t *nvl, char locality)
4243 {
4244         nvpair_t *nvp = NULL;
4245         fs_perm_set_t *fspset = who_perm->who_fsperm->fsp_set;
4246         uu_avl_t *avl = who_perm->who_deleg_perm_avl;
4247         zfs_deleg_who_type_t who_type = who_perm->who_type;
4248
4249         while ((nvp = nvlist_next_nvpair(nvl, nvp)) != NULL) {
4250                 const char *name = nvpair_name(nvp);
4251                 data_type_t type = nvpair_type(nvp);
4252                 uu_avl_pool_t *avl_pool = fspset->fsps_deleg_perm_avl_pool;
4253                 deleg_perm_node_t *node =
4254                     safe_malloc(sizeof (deleg_perm_node_t));
4255
4256                 assert(type == DATA_TYPE_BOOLEAN);
4257
4258                 uu_avl_node_init(node, &node->dpn_avl_node, avl_pool);
4259                 set_deleg_perm_node(avl, node, who_type, name, locality);
4260         }
4261
4262         return (0);
4263 }
4264
4265 static inline int
4266 parse_fs_perm(fs_perm_t *fsperm, nvlist_t *nvl)
4267 {
4268         nvpair_t *nvp = NULL;
4269         fs_perm_set_t *fspset = fsperm->fsp_set;
4270
4271         while ((nvp = nvlist_next_nvpair(nvl, nvp)) != NULL) {
4272                 nvlist_t *nvl2 = NULL;
4273                 const char *name = nvpair_name(nvp);
4274                 uu_avl_t *avl = NULL;
4275                 uu_avl_pool_t *avl_pool;
4276                 zfs_deleg_who_type_t perm_type = name[0];
4277                 char perm_locality = name[1];
4278                 const char *perm_name = name + 3;
4279                 boolean_t is_set = B_TRUE;
4280                 who_perm_t *who_perm = NULL;
4281
4282                 assert('$' == name[2]);
4283
4284                 if (nvpair_value_nvlist(nvp, &nvl2) != 0)
4285                         return (-1);
4286
4287                 switch (perm_type) {
4288                 case ZFS_DELEG_CREATE:
4289                 case ZFS_DELEG_CREATE_SETS:
4290                 case ZFS_DELEG_NAMED_SET:
4291                 case ZFS_DELEG_NAMED_SET_SETS:
4292                         avl_pool = fspset->fsps_named_set_avl_pool;
4293                         avl = fsperm->fsp_sc_avl;
4294                         break;
4295                 case ZFS_DELEG_USER:
4296                 case ZFS_DELEG_USER_SETS:
4297                 case ZFS_DELEG_GROUP:
4298                 case ZFS_DELEG_GROUP_SETS:
4299                 case ZFS_DELEG_EVERYONE:
4300                 case ZFS_DELEG_EVERYONE_SETS:
4301                         avl_pool = fspset->fsps_who_perm_avl_pool;
4302                         avl = fsperm->fsp_uge_avl;
4303                         break;
4304                 }
4305
4306                 if (is_set) {
4307                         who_perm_node_t *found_node = NULL;
4308                         who_perm_node_t *node = safe_malloc(
4309                             sizeof (who_perm_node_t));
4310                         who_perm = &node->who_perm;
4311                         uu_avl_index_t idx = 0;
4312
4313                         uu_avl_node_init(node, &node->who_avl_node, avl_pool);
4314                         who_perm_init(who_perm, fsperm, perm_type, perm_name);
4315
4316                         if ((found_node = uu_avl_find(avl, node, NULL, &idx))
4317                             == NULL) {
4318                                 if (avl == fsperm->fsp_uge_avl) {
4319                                         uid_t rid = 0;
4320                                         struct passwd *p = NULL;
4321                                         struct group *g = NULL;
4322                                         const char *nice_name = NULL;
4323
4324                                         switch (perm_type) {
4325                                         case ZFS_DELEG_USER_SETS:
4326                                         case ZFS_DELEG_USER:
4327                                                 rid = atoi(perm_name);
4328                                                 p = getpwuid(rid);
4329                                                 if (p)
4330                                                         nice_name = p->pw_name;
4331                                                 break;
4332                                         case ZFS_DELEG_GROUP_SETS:
4333                                         case ZFS_DELEG_GROUP:
4334                                                 rid = atoi(perm_name);
4335                                                 g = getgrgid(rid);
4336                                                 if (g)
4337                                                         nice_name = g->gr_name;
4338                                                 break;
4339                                         }
4340
4341                                         if (nice_name != NULL)
4342                                                 (void) strlcpy(
4343                                                     node->who_perm.who_ug_name,
4344                                                     nice_name, 256);
4345                                 }
4346
4347                                 uu_avl_insert(avl, node, idx);
4348                         } else {
4349                                 node = found_node;
4350                                 who_perm = &node->who_perm;
4351                         }
4352                 }
4353
4354                 (void) parse_who_perm(who_perm, nvl2, perm_locality);
4355         }
4356
4357         return (0);
4358 }
4359
4360 static inline int
4361 parse_fs_perm_set(fs_perm_set_t *fspset, nvlist_t *nvl)
4362 {
4363         nvpair_t *nvp = NULL;
4364         uu_avl_index_t idx = 0;
4365
4366         while ((nvp = nvlist_next_nvpair(nvl, nvp)) != NULL) {
4367                 nvlist_t *nvl2 = NULL;
4368                 const char *fsname = nvpair_name(nvp);
4369                 data_type_t type = nvpair_type(nvp);
4370                 fs_perm_t *fsperm = NULL;
4371                 fs_perm_node_t *node = safe_malloc(sizeof (fs_perm_node_t));
4372                 if (node == NULL)
4373                         nomem();
4374
4375                 fsperm = &node->fspn_fsperm;
4376
4377                 assert(DATA_TYPE_NVLIST == type);
4378
4379                 uu_list_node_init(node, &node->fspn_list_node,
4380                     fspset->fsps_list_pool);
4381
4382                 idx = uu_list_numnodes(fspset->fsps_list);
4383                 fs_perm_init(fsperm, fspset, fsname);
4384
4385                 if (nvpair_value_nvlist(nvp, &nvl2) != 0)
4386                         return (-1);
4387
4388                 (void) parse_fs_perm(fsperm, nvl2);
4389
4390                 uu_list_insert(fspset->fsps_list, node, idx);
4391         }
4392
4393         return (0);
4394 }
4395
4396 static inline const char *
4397 deleg_perm_comment(zfs_deleg_note_t note)
4398 {
4399         const char *str = "";
4400
4401         /* subcommands */
4402         switch (note) {
4403                 /* SUBCOMMANDS */
4404         case ZFS_DELEG_NOTE_ALLOW:
4405                 str = gettext("Must also have the permission that is being"
4406                     "\n\t\t\t\tallowed");
4407                 break;
4408         case ZFS_DELEG_NOTE_CLONE:
4409                 str = gettext("Must also have the 'create' ability and 'mount'"
4410                     "\n\t\t\t\tability in the origin file system");
4411                 break;
4412         case ZFS_DELEG_NOTE_CREATE:
4413                 str = gettext("Must also have the 'mount' ability");
4414                 break;
4415         case ZFS_DELEG_NOTE_DESTROY:
4416                 str = gettext("Must also have the 'mount' ability");
4417                 break;
4418         case ZFS_DELEG_NOTE_DIFF:
4419                 str = gettext("Allows lookup of paths within a dataset;"
4420                     "\n\t\t\t\tgiven an object number. Ordinary users need this"
4421                     "\n\t\t\t\tin order to use zfs diff");
4422                 break;
4423         case ZFS_DELEG_NOTE_HOLD:
4424                 str = gettext("Allows adding a user hold to a snapshot");
4425                 break;
4426         case ZFS_DELEG_NOTE_MOUNT:
4427                 str = gettext("Allows mount/umount of ZFS datasets");
4428                 break;
4429         case ZFS_DELEG_NOTE_PROMOTE:
4430                 str = gettext("Must also have the 'mount'\n\t\t\t\tand"
4431                     " 'promote' ability in the origin file system");
4432                 break;
4433         case ZFS_DELEG_NOTE_RECEIVE:
4434                 str = gettext("Must also have the 'mount' and 'create'"
4435                     " ability");
4436                 break;
4437         case ZFS_DELEG_NOTE_RELEASE:
4438                 str = gettext("Allows releasing a user hold which\n\t\t\t\t"
4439                     "might destroy the snapshot");
4440                 break;
4441         case ZFS_DELEG_NOTE_RENAME:
4442                 str = gettext("Must also have the 'mount' and 'create'"
4443                     "\n\t\t\t\tability in the new parent");
4444                 break;
4445         case ZFS_DELEG_NOTE_ROLLBACK:
4446                 str = gettext("");
4447                 break;
4448         case ZFS_DELEG_NOTE_SEND:
4449                 str = gettext("");
4450                 break;
4451         case ZFS_DELEG_NOTE_SHARE:
4452                 str = gettext("Allows sharing file systems over NFS or SMB"
4453                     "\n\t\t\t\tprotocols");
4454                 break;
4455         case ZFS_DELEG_NOTE_SNAPSHOT:
4456                 str = gettext("");
4457                 break;
4458 /*
4459  *      case ZFS_DELEG_NOTE_VSCAN:
4460  *              str = gettext("");
4461  *              break;
4462  */
4463                 /* OTHER */
4464         case ZFS_DELEG_NOTE_GROUPQUOTA:
4465                 str = gettext("Allows accessing any groupquota@... property");
4466                 break;
4467         case ZFS_DELEG_NOTE_GROUPUSED:
4468                 str = gettext("Allows reading any groupused@... property");
4469                 break;
4470         case ZFS_DELEG_NOTE_USERPROP:
4471                 str = gettext("Allows changing any user property");
4472                 break;
4473         case ZFS_DELEG_NOTE_USERQUOTA:
4474                 str = gettext("Allows accessing any userquota@... property");
4475                 break;
4476         case ZFS_DELEG_NOTE_USERUSED:
4477                 str = gettext("Allows reading any userused@... property");
4478                 break;
4479                 /* other */
4480         default:
4481                 str = "";
4482         }
4483
4484         return (str);
4485 }
4486
4487 struct allow_opts {
4488         boolean_t local;
4489         boolean_t descend;
4490         boolean_t user;
4491         boolean_t group;
4492         boolean_t everyone;
4493         boolean_t create;
4494         boolean_t set;
4495         boolean_t recursive; /* unallow only */
4496         boolean_t prt_usage;
4497
4498         boolean_t prt_perms;
4499         char *who;
4500         char *perms;
4501         const char *dataset;
4502 };
4503
4504 static inline int
4505 prop_cmp(const void *a, const void *b)
4506 {
4507         const char *str1 = *(const char **)a;
4508         const char *str2 = *(const char **)b;
4509         return (strcmp(str1, str2));
4510 }
4511
4512 static void
4513 allow_usage(boolean_t un, boolean_t requested, const char *msg)
4514 {
4515         const char *opt_desc[] = {
4516                 "-h", gettext("show this help message and exit"),
4517                 "-l", gettext("set permission locally"),
4518                 "-d", gettext("set permission for descents"),
4519                 "-u", gettext("set permission for user"),
4520                 "-g", gettext("set permission for group"),
4521                 "-e", gettext("set permission for everyone"),
4522                 "-c", gettext("set create time permission"),
4523                 "-s", gettext("define permission set"),
4524                 /* unallow only */
4525                 "-r", gettext("remove permissions recursively"),
4526         };
4527         size_t unallow_size = sizeof (opt_desc) / sizeof (char *);
4528         size_t allow_size = unallow_size - 2;
4529         const char *props[ZFS_NUM_PROPS];
4530         int i;
4531         size_t count = 0;
4532         FILE *fp = requested ? stdout : stderr;
4533         zprop_desc_t *pdtbl = zfs_prop_get_table();
4534         const char *fmt = gettext("%-16s %-14s\t%s\n");
4535
4536         (void) fprintf(fp, gettext("Usage: %s\n"), get_usage(un ? HELP_UNALLOW :
4537             HELP_ALLOW));
4538         (void) fprintf(fp, gettext("Options:\n"));
4539         for (i = 0; i < (un ? unallow_size : allow_size); i++) {
4540                 const char *opt = opt_desc[i++];
4541                 const char *optdsc = opt_desc[i];
4542                 (void) fprintf(fp, gettext("  %-10s  %s\n"), opt, optdsc);
4543         }
4544
4545         (void) fprintf(fp, gettext("\nThe following permissions are "
4546             "supported:\n\n"));
4547         (void) fprintf(fp, fmt, gettext("NAME"), gettext("TYPE"),
4548             gettext("NOTES"));
4549         for (i = 0; i < ZFS_NUM_DELEG_NOTES; i++) {
4550                 const char *perm_name = zfs_deleg_perm_tbl[i].z_perm;
4551                 zfs_deleg_note_t perm_note = zfs_deleg_perm_tbl[i].z_note;
4552                 const char *perm_type = deleg_perm_type(perm_note);
4553                 const char *perm_comment = deleg_perm_comment(perm_note);
4554                 (void) fprintf(fp, fmt, perm_name, perm_type, perm_comment);
4555         }
4556
4557         for (i = 0; i < ZFS_NUM_PROPS; i++) {
4558                 zprop_desc_t *pd = &pdtbl[i];
4559                 if (pd->pd_visible != B_TRUE)
4560                         continue;
4561
4562                 if (pd->pd_attr == PROP_READONLY)
4563                         continue;
4564
4565                 props[count++] = pd->pd_name;
4566         }
4567         props[count] = NULL;
4568
4569         qsort(props, count, sizeof (char *), prop_cmp);
4570
4571         for (i = 0; i < count; i++)
4572                 (void) fprintf(fp, fmt, props[i], gettext("property"), "");
4573
4574         if (msg != NULL)
4575                 (void) fprintf(fp, gettext("\nzfs: error: %s"), msg);
4576
4577         exit(requested ? 0 : 2);
4578 }
4579
4580 static inline const char *
4581 munge_args(int argc, char **argv, boolean_t un, size_t expected_argc,
4582     char **permsp)
4583 {
4584         if (un && argc == expected_argc - 1)
4585                 *permsp = NULL;
4586         else if (argc == expected_argc)
4587                 *permsp = argv[argc - 2];
4588         else
4589                 allow_usage(un, B_FALSE,
4590                     gettext("wrong number of parameters\n"));
4591
4592         return (argv[argc - 1]);
4593 }
4594
4595 static void
4596 parse_allow_args(int argc, char **argv, boolean_t un, struct allow_opts *opts)
4597 {
4598         int uge_sum = opts->user + opts->group + opts->everyone;
4599         int csuge_sum = opts->create + opts->set + uge_sum;
4600         int ldcsuge_sum = csuge_sum + opts->local + opts->descend;
4601         int all_sum = un ? ldcsuge_sum + opts->recursive : ldcsuge_sum;
4602
4603         if (uge_sum > 1)
4604                 allow_usage(un, B_FALSE,
4605                     gettext("-u, -g, and -e are mutually exclusive\n"));
4606
4607         if (opts->prt_usage)
4608                 if (argc == 0 && all_sum == 0)
4609                         allow_usage(un, B_TRUE, NULL);
4610                 else
4611                         usage(B_FALSE);
4612
4613         if (opts->set) {
4614                 if (csuge_sum > 1)
4615                         allow_usage(un, B_FALSE,
4616                             gettext("invalid options combined with -s\n"));
4617
4618                 opts->dataset = munge_args(argc, argv, un, 3, &opts->perms);
4619                 if (argv[0][0] != '@')
4620                         allow_usage(un, B_FALSE,
4621                             gettext("invalid set name: missing '@' prefix\n"));
4622                 opts->who = argv[0];
4623         } else if (opts->create) {
4624                 if (ldcsuge_sum > 1)
4625                         allow_usage(un, B_FALSE,
4626                             gettext("invalid options combined with -c\n"));
4627                 opts->dataset = munge_args(argc, argv, un, 2, &opts->perms);
4628         } else if (opts->everyone) {
4629                 if (csuge_sum > 1)
4630                         allow_usage(un, B_FALSE,
4631                             gettext("invalid options combined with -e\n"));
4632                 opts->dataset = munge_args(argc, argv, un, 2, &opts->perms);
4633         } else if (uge_sum == 0 && argc > 0 && strcmp(argv[0], "everyone")
4634             == 0) {
4635                 opts->everyone = B_TRUE;
4636                 argc--;
4637                 argv++;
4638                 opts->dataset = munge_args(argc, argv, un, 2, &opts->perms);
4639         } else if (argc == 1 && !un) {
4640                 opts->prt_perms = B_TRUE;
4641                 opts->dataset = argv[argc-1];
4642         } else {
4643                 opts->dataset = munge_args(argc, argv, un, 3, &opts->perms);
4644                 opts->who = argv[0];
4645         }
4646
4647         if (!opts->local && !opts->descend) {
4648                 opts->local = B_TRUE;
4649                 opts->descend = B_TRUE;
4650         }
4651 }
4652
4653 static void
4654 store_allow_perm(zfs_deleg_who_type_t type, boolean_t local, boolean_t descend,
4655     const char *who, char *perms, nvlist_t *top_nvl)
4656 {
4657         int i;
4658         char ld[2] = { '\0', '\0' };
4659         char who_buf[ZFS_MAXNAMELEN+32];
4660         char base_type;
4661         char set_type;
4662         nvlist_t *base_nvl = NULL;
4663         nvlist_t *set_nvl = NULL;
4664         nvlist_t *nvl;
4665
4666         if (nvlist_alloc(&base_nvl, NV_UNIQUE_NAME, 0) != 0)
4667                 nomem();
4668         if (nvlist_alloc(&set_nvl, NV_UNIQUE_NAME, 0) !=  0)
4669                 nomem();
4670
4671         switch (type) {
4672         case ZFS_DELEG_NAMED_SET_SETS:
4673         case ZFS_DELEG_NAMED_SET:
4674                 set_type = ZFS_DELEG_NAMED_SET_SETS;
4675                 base_type = ZFS_DELEG_NAMED_SET;
4676                 ld[0] = ZFS_DELEG_NA;
4677                 break;
4678         case ZFS_DELEG_CREATE_SETS:
4679         case ZFS_DELEG_CREATE:
4680                 set_type = ZFS_DELEG_CREATE_SETS;
4681                 base_type = ZFS_DELEG_CREATE;
4682                 ld[0] = ZFS_DELEG_NA;
4683                 break;
4684         case ZFS_DELEG_USER_SETS:
4685         case ZFS_DELEG_USER:
4686                 set_type = ZFS_DELEG_USER_SETS;
4687                 base_type = ZFS_DELEG_USER;
4688                 if (local)
4689                         ld[0] = ZFS_DELEG_LOCAL;
4690                 if (descend)
4691                         ld[1] = ZFS_DELEG_DESCENDENT;
4692                 break;
4693         case ZFS_DELEG_GROUP_SETS:
4694         case ZFS_DELEG_GROUP:
4695                 set_type = ZFS_DELEG_GROUP_SETS;
4696                 base_type = ZFS_DELEG_GROUP;
4697                 if (local)
4698                         ld[0] = ZFS_DELEG_LOCAL;
4699                 if (descend)
4700                         ld[1] = ZFS_DELEG_DESCENDENT;
4701                 break;
4702         case ZFS_DELEG_EVERYONE_SETS:
4703         case ZFS_DELEG_EVERYONE:
4704                 set_type = ZFS_DELEG_EVERYONE_SETS;
4705                 base_type = ZFS_DELEG_EVERYONE;
4706                 if (local)
4707                         ld[0] = ZFS_DELEG_LOCAL;
4708                 if (descend)
4709                         ld[1] = ZFS_DELEG_DESCENDENT;
4710         }
4711
4712         if (perms != NULL) {
4713                 char *curr = perms;
4714                 char *end = curr + strlen(perms);
4715
4716                 while (curr < end) {
4717                         char *delim = strchr(curr, ',');
4718                         if (delim == NULL)
4719                                 delim = end;
4720                         else
4721                                 *delim = '\0';
4722
4723                         if (curr[0] == '@')
4724                                 nvl = set_nvl;
4725                         else
4726                                 nvl = base_nvl;
4727
4728                         (void) nvlist_add_boolean(nvl, curr);
4729                         if (delim != end)
4730                                 *delim = ',';
4731                         curr = delim + 1;
4732                 }
4733
4734                 for (i = 0; i < 2; i++) {
4735                         char locality = ld[i];
4736                         if (locality == 0)
4737                                 continue;
4738
4739                         if (!nvlist_empty(base_nvl)) {
4740                                 if (who != NULL)
4741                                         (void) snprintf(who_buf,
4742                                             sizeof (who_buf), "%c%c$%s",
4743                                             base_type, locality, who);
4744                                 else
4745                                         (void) snprintf(who_buf,
4746                                             sizeof (who_buf), "%c%c$",
4747                                             base_type, locality);
4748
4749                                 (void) nvlist_add_nvlist(top_nvl, who_buf,
4750                                     base_nvl);
4751                         }
4752
4753
4754                         if (!nvlist_empty(set_nvl)) {
4755                                 if (who != NULL)
4756                                         (void) snprintf(who_buf,
4757                                             sizeof (who_buf), "%c%c$%s",
4758                                             set_type, locality, who);
4759                                 else
4760                                         (void) snprintf(who_buf,
4761                                             sizeof (who_buf), "%c%c$",
4762                                             set_type, locality);
4763
4764                                 (void) nvlist_add_nvlist(top_nvl, who_buf,
4765                                     set_nvl);
4766                         }
4767                 }
4768         } else {
4769                 for (i = 0; i < 2; i++) {
4770                         char locality = ld[i];
4771                         if (locality == 0)
4772                                 continue;
4773
4774                         if (who != NULL)
4775                                 (void) snprintf(who_buf, sizeof (who_buf),
4776                                     "%c%c$%s", base_type, locality, who);
4777                         else
4778                                 (void) snprintf(who_buf, sizeof (who_buf),
4779                                     "%c%c$", base_type, locality);
4780                         (void) nvlist_add_boolean(top_nvl, who_buf);
4781
4782                         if (who != NULL)
4783                                 (void) snprintf(who_buf, sizeof (who_buf),
4784                                     "%c%c$%s", set_type, locality, who);
4785                         else
4786                                 (void) snprintf(who_buf, sizeof (who_buf),
4787                                     "%c%c$", set_type, locality);
4788                         (void) nvlist_add_boolean(top_nvl, who_buf);
4789                 }
4790         }
4791 }
4792
4793 static int
4794 construct_fsacl_list(boolean_t un, struct allow_opts *opts, nvlist_t **nvlp)
4795 {
4796         if (nvlist_alloc(nvlp, NV_UNIQUE_NAME, 0) != 0)
4797                 nomem();
4798
4799         if (opts->set) {
4800                 store_allow_perm(ZFS_DELEG_NAMED_SET, opts->local,
4801                     opts->descend, opts->who, opts->perms, *nvlp);
4802         } else if (opts->create) {
4803                 store_allow_perm(ZFS_DELEG_CREATE, opts->local,
4804                     opts->descend, NULL, opts->perms, *nvlp);
4805         } else if (opts->everyone) {
4806                 store_allow_perm(ZFS_DELEG_EVERYONE, opts->local,
4807                     opts->descend, NULL, opts->perms, *nvlp);
4808         } else {
4809                 char *curr = opts->who;
4810                 char *end = curr + strlen(curr);
4811
4812                 while (curr < end) {
4813                         const char *who;
4814                         zfs_deleg_who_type_t who_type;
4815                         char *endch;
4816                         char *delim = strchr(curr, ',');
4817                         char errbuf[256];
4818                         char id[64];
4819                         struct passwd *p = NULL;
4820                         struct group *g = NULL;
4821
4822                         uid_t rid;
4823                         if (delim == NULL)
4824                                 delim = end;
4825                         else
4826                                 *delim = '\0';
4827
4828                         rid = (uid_t)strtol(curr, &endch, 0);
4829                         if (opts->user) {
4830                                 who_type = ZFS_DELEG_USER;
4831                                 if (*endch != '\0')
4832                                         p = getpwnam(curr);
4833                                 else
4834                                         p = getpwuid(rid);
4835
4836                                 if (p != NULL)
4837                                         rid = p->pw_uid;
4838                                 else {
4839                                         (void) snprintf(errbuf, 256, gettext(
4840                                             "invalid user %s"), curr);
4841                                         allow_usage(un, B_TRUE, errbuf);
4842                                 }
4843                         } else if (opts->group) {
4844                                 who_type = ZFS_DELEG_GROUP;
4845                                 if (*endch != '\0')
4846                                         g = getgrnam(curr);
4847                                 else
4848                                         g = getgrgid(rid);
4849
4850                                 if (g != NULL)
4851                                         rid = g->gr_gid;
4852                                 else {
4853                                         (void) snprintf(errbuf, 256, gettext(
4854                                             "invalid group %s"),  curr);
4855                                         allow_usage(un, B_TRUE, errbuf);
4856                                 }
4857                         } else {
4858                                 if (*endch != '\0') {
4859                                         p = getpwnam(curr);
4860                                 } else {
4861                                         p = getpwuid(rid);
4862                                 }
4863
4864                                 if (p == NULL)
4865                                         if (*endch != '\0') {
4866                                                 g = getgrnam(curr);
4867                                         } else {
4868                                                 g = getgrgid(rid);
4869                                         }
4870
4871                                 if (p != NULL) {
4872                                         who_type = ZFS_DELEG_USER;
4873                                         rid = p->pw_uid;
4874                                 } else if (g != NULL) {
4875                                         who_type = ZFS_DELEG_GROUP;
4876                                         rid = g->gr_gid;
4877                                 } else {
4878                                         (void) snprintf(errbuf, 256, gettext(
4879                                             "invalid user/group %s"), curr);
4880                                         allow_usage(un, B_TRUE, errbuf);
4881                                 }
4882                         }
4883
4884                         (void) sprintf(id, "%u", rid);
4885                         who = id;
4886
4887                         store_allow_perm(who_type, opts->local,
4888                             opts->descend, who, opts->perms, *nvlp);
4889                         curr = delim + 1;
4890                 }
4891         }
4892
4893         return (0);
4894 }
4895
4896 static void
4897 print_set_creat_perms(uu_avl_t *who_avl)
4898 {
4899         const char *sc_title[] = {
4900                 gettext("Permission sets:\n"),
4901                 gettext("Create time permissions:\n"),
4902                 NULL
4903         };
4904         const char **title_ptr = sc_title;
4905         who_perm_node_t *who_node = NULL;
4906         int prev_weight = -1;
4907
4908         for (who_node = uu_avl_first(who_avl); who_node != NULL;
4909             who_node = uu_avl_next(who_avl, who_node)) {
4910                 uu_avl_t *avl = who_node->who_perm.who_deleg_perm_avl;
4911                 zfs_deleg_who_type_t who_type = who_node->who_perm.who_type;
4912                 const char *who_name = who_node->who_perm.who_name;
4913                 int weight = who_type2weight(who_type);
4914                 boolean_t first = B_TRUE;
4915                 deleg_perm_node_t *deleg_node;
4916
4917                 if (prev_weight != weight) {
4918                         (void) printf(*title_ptr++);
4919                         prev_weight = weight;
4920                 }
4921
4922                 if (who_name == NULL || strnlen(who_name, 1) == 0)
4923                         (void) printf("\t");
4924                 else
4925                         (void) printf("\t%s ", who_name);
4926
4927                 for (deleg_node = uu_avl_first(avl); deleg_node != NULL;
4928                     deleg_node = uu_avl_next(avl, deleg_node)) {
4929                         if (first) {
4930                                 (void) printf("%s",
4931                                     deleg_node->dpn_perm.dp_name);
4932                                 first = B_FALSE;
4933                         } else
4934                                 (void) printf(",%s",
4935                                     deleg_node->dpn_perm.dp_name);
4936                 }
4937
4938                 (void) printf("\n");
4939         }
4940 }
4941
4942 static void inline
4943 print_uge_deleg_perms(uu_avl_t *who_avl, boolean_t local, boolean_t descend,
4944     const char *title)
4945 {
4946         who_perm_node_t *who_node = NULL;
4947         boolean_t prt_title = B_TRUE;
4948         uu_avl_walk_t *walk;
4949
4950         if ((walk = uu_avl_walk_start(who_avl, UU_WALK_ROBUST)) == NULL)
4951                 nomem();
4952
4953         while ((who_node = uu_avl_walk_next(walk)) != NULL) {
4954                 const char *who_name = who_node->who_perm.who_name;
4955                 const char *nice_who_name = who_node->who_perm.who_ug_name;
4956                 uu_avl_t *avl = who_node->who_perm.who_deleg_perm_avl;
4957                 zfs_deleg_who_type_t who_type = who_node->who_perm.who_type;
4958                 char delim = ' ';
4959                 deleg_perm_node_t *deleg_node;
4960                 boolean_t prt_who = B_TRUE;
4961
4962                 for (deleg_node = uu_avl_first(avl);
4963                     deleg_node != NULL;
4964                     deleg_node = uu_avl_next(avl, deleg_node)) {
4965                         if (local != deleg_node->dpn_perm.dp_local ||
4966                             descend != deleg_node->dpn_perm.dp_descend)
4967                                 continue;
4968
4969                         if (prt_who) {
4970                                 const char *who = NULL;
4971                                 if (prt_title) {
4972                                         prt_title = B_FALSE;
4973                                         (void) printf(title);
4974                                 }
4975
4976                                 switch (who_type) {
4977                                 case ZFS_DELEG_USER_SETS:
4978                                 case ZFS_DELEG_USER:
4979                                         who = gettext("user");
4980                                         if (nice_who_name)
4981                                                 who_name  = nice_who_name;
4982                                         break;
4983                                 case ZFS_DELEG_GROUP_SETS:
4984                                 case ZFS_DELEG_GROUP:
4985                                         who = gettext("group");
4986                                         if (nice_who_name)
4987                                                 who_name  = nice_who_name;
4988                                         break;
4989                                 case ZFS_DELEG_EVERYONE_SETS:
4990                                 case ZFS_DELEG_EVERYONE:
4991                                         who = gettext("everyone");
4992                                         who_name = NULL;
4993                                 }
4994
4995                                 prt_who = B_FALSE;
4996                                 if (who_name == NULL)
4997                                         (void) printf("\t%s", who);
4998                                 else
4999                                         (void) printf("\t%s %s", who, who_name);
5000                         }
5001
5002                         (void) printf("%c%s", delim,
5003                             deleg_node->dpn_perm.dp_name);
5004                         delim = ',';
5005                 }
5006
5007                 if (!prt_who)
5008                         (void) printf("\n");
5009         }
5010
5011         uu_avl_walk_end(walk);
5012 }
5013
5014 static void
5015 print_fs_perms(fs_perm_set_t *fspset)
5016 {
5017         fs_perm_node_t *node = NULL;
5018         char buf[ZFS_MAXNAMELEN+32];
5019         const char *dsname = buf;
5020
5021         for (node = uu_list_first(fspset->fsps_list); node != NULL;
5022             node = uu_list_next(fspset->fsps_list, node)) {
5023                 uu_avl_t *sc_avl = node->fspn_fsperm.fsp_sc_avl;
5024                 uu_avl_t *uge_avl = node->fspn_fsperm.fsp_uge_avl;
5025                 int left = 0;
5026
5027                 (void) snprintf(buf, ZFS_MAXNAMELEN+32,
5028                     gettext("---- Permissions on %s "),
5029                     node->fspn_fsperm.fsp_name);
5030                 (void) printf(dsname);
5031                 left = 70 - strlen(buf);
5032                 while (left-- > 0)
5033                         (void) printf("-");
5034                 (void) printf("\n");
5035
5036                 print_set_creat_perms(sc_avl);
5037                 print_uge_deleg_perms(uge_avl, B_TRUE, B_FALSE,
5038                     gettext("Local permissions:\n"));
5039                 print_uge_deleg_perms(uge_avl, B_FALSE, B_TRUE,
5040                     gettext("Descendent permissions:\n"));
5041                 print_uge_deleg_perms(uge_avl, B_TRUE, B_TRUE,
5042                     gettext("Local+Descendent permissions:\n"));
5043         }
5044 }
5045
5046 static fs_perm_set_t fs_perm_set = { NULL, NULL, NULL, NULL };
5047
5048 struct deleg_perms {
5049         boolean_t un;
5050         nvlist_t *nvl;
5051 };
5052
5053 static int
5054 set_deleg_perms(zfs_handle_t *zhp, void *data)
5055 {
5056         struct deleg_perms *perms = (struct deleg_perms *)data;
5057         zfs_type_t zfs_type = zfs_get_type(zhp);
5058
5059         if (zfs_type != ZFS_TYPE_FILESYSTEM && zfs_type != ZFS_TYPE_VOLUME)
5060                 return (0);
5061
5062         return (zfs_set_fsacl(zhp, perms->un, perms->nvl));
5063 }
5064
5065 static int
5066 zfs_do_allow_unallow_impl(int argc, char **argv, boolean_t un)
5067 {
5068         zfs_handle_t *zhp;
5069         nvlist_t *perm_nvl = NULL;
5070         nvlist_t *update_perm_nvl = NULL;
5071         int error = 1;
5072         int c;
5073         struct allow_opts opts = { 0 };
5074
5075         const char *optstr = un ? "ldugecsrh" : "ldugecsh";
5076
5077         /* check opts */
5078         while ((c = getopt(argc, argv, optstr)) != -1) {
5079                 switch (c) {
5080                 case 'l':
5081                         opts.local = B_TRUE;
5082                         break;
5083                 case 'd':
5084                         opts.descend = B_TRUE;
5085                         break;
5086                 case 'u':
5087                         opts.user = B_TRUE;
5088                         break;
5089                 case 'g':
5090                         opts.group = B_TRUE;
5091                         break;
5092                 case 'e':
5093                         opts.everyone = B_TRUE;
5094                         break;
5095                 case 's':
5096                         opts.set = B_TRUE;
5097                         break;
5098                 case 'c':
5099                         opts.create = B_TRUE;
5100                         break;
5101                 case 'r':
5102                         opts.recursive = B_TRUE;
5103                         break;
5104                 case ':':
5105                         (void) fprintf(stderr, gettext("missing argument for "
5106                             "'%c' option\n"), optopt);
5107                         usage(B_FALSE);
5108                         break;
5109                 case 'h':
5110                         opts.prt_usage = B_TRUE;
5111                         break;
5112                 case '?':
5113                         (void) fprintf(stderr, gettext("invalid option '%c'\n"),
5114                             optopt);
5115                         usage(B_FALSE);
5116                 }
5117         }
5118
5119         argc -= optind;
5120         argv += optind;
5121
5122         /* check arguments */
5123         parse_allow_args(argc, argv, un, &opts);
5124
5125         /* try to open the dataset */
5126         if ((zhp = zfs_open(g_zfs, opts.dataset, ZFS_TYPE_FILESYSTEM |
5127             ZFS_TYPE_VOLUME)) == NULL) {
5128                 (void) fprintf(stderr, "Failed to open dataset: %s\n",
5129                     opts.dataset);
5130                 return (-1);
5131         }
5132
5133         if (zfs_get_fsacl(zhp, &perm_nvl) != 0)
5134                 goto cleanup2;
5135
5136         fs_perm_set_init(&fs_perm_set);
5137         if (parse_fs_perm_set(&fs_perm_set, perm_nvl) != 0) {
5138                 (void) fprintf(stderr, "Failed to parse fsacl permissions\n");
5139                 goto cleanup1;
5140         }
5141
5142         if (opts.prt_perms)
5143                 print_fs_perms(&fs_perm_set);
5144         else {
5145                 (void) construct_fsacl_list(un, &opts, &update_perm_nvl);
5146                 if (zfs_set_fsacl(zhp, un, update_perm_nvl) != 0)
5147                         goto cleanup0;
5148
5149                 if (un && opts.recursive) {
5150                         struct deleg_perms data = { un, update_perm_nvl };
5151                         if (zfs_iter_filesystems(zhp, set_deleg_perms,
5152                             &data) != 0)
5153                                 goto cleanup0;
5154                 }
5155         }
5156
5157         error = 0;
5158
5159 cleanup0:
5160         nvlist_free(perm_nvl);
5161         if (update_perm_nvl != NULL)
5162                 nvlist_free(update_perm_nvl);
5163 cleanup1:
5164         fs_perm_set_fini(&fs_perm_set);
5165 cleanup2:
5166         zfs_close(zhp);
5167
5168         return (error);
5169 }
5170
5171 static int
5172 zfs_do_allow(int argc, char **argv)
5173 {
5174         return (zfs_do_allow_unallow_impl(argc, argv, B_FALSE));
5175 }
5176
5177 static int
5178 zfs_do_unallow(int argc, char **argv)
5179 {
5180         return (zfs_do_allow_unallow_impl(argc, argv, B_TRUE));
5181 }
5182
5183 static int
5184 zfs_do_hold_rele_impl(int argc, char **argv, boolean_t holding)
5185 {
5186         int errors = 0;
5187         int i;
5188         const char *tag;
5189         boolean_t recursive = B_FALSE;
5190         const char *opts = holding ? "rt" : "r";
5191         int c;
5192
5193         /* check options */
5194         while ((c = getopt(argc, argv, opts)) != -1) {
5195                 switch (c) {
5196                 case 'r':
5197                         recursive = B_TRUE;
5198                         break;
5199                 case '?':
5200                         (void) fprintf(stderr, gettext("invalid option '%c'\n"),
5201                             optopt);
5202                         usage(B_FALSE);
5203                 }
5204         }
5205
5206         argc -= optind;
5207         argv += optind;
5208
5209         /* check number of arguments */
5210         if (argc < 2)
5211                 usage(B_FALSE);
5212
5213         tag = argv[0];
5214         --argc;
5215         ++argv;
5216
5217         if (holding && tag[0] == '.') {
5218                 /* tags starting with '.' are reserved for libzfs */
5219                 (void) fprintf(stderr, gettext("tag may not start with '.'\n"));
5220                 usage(B_FALSE);
5221         }
5222
5223         for (i = 0; i < argc; ++i) {
5224                 zfs_handle_t *zhp;
5225                 char parent[ZFS_MAXNAMELEN];
5226                 const char *delim;
5227                 char *path = argv[i];
5228
5229                 delim = strchr(path, '@');
5230                 if (delim == NULL) {
5231                         (void) fprintf(stderr,
5232                             gettext("'%s' is not a snapshot\n"), path);
5233                         ++errors;
5234                         continue;
5235                 }
5236                 (void) strncpy(parent, path, delim - path);
5237                 parent[delim - path] = '\0';
5238
5239                 zhp = zfs_open(g_zfs, parent,
5240                     ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME);
5241                 if (zhp == NULL) {
5242                         ++errors;
5243                         continue;
5244                 }
5245                 if (holding) {
5246                         if (zfs_hold(zhp, delim+1, tag, recursive, -1) != 0)
5247                                 ++errors;
5248                 } else {
5249                         if (zfs_release(zhp, delim+1, tag, recursive) != 0)
5250                                 ++errors;
5251                 }
5252                 zfs_close(zhp);
5253         }
5254
5255         return (errors != 0);
5256 }
5257
5258 /*
5259  * zfs hold [-r] [-t] <tag> <snap> ...
5260  *
5261  *      -r      Recursively hold
5262  *
5263  * Apply a user-hold with the given tag to the list of snapshots.
5264  */
5265 static int
5266 zfs_do_hold(int argc, char **argv)
5267 {
5268         return (zfs_do_hold_rele_impl(argc, argv, B_TRUE));
5269 }
5270
5271 /*
5272  * zfs release [-r] <tag> <snap> ...
5273  *
5274  *      -r      Recursively release
5275  *
5276  * Release a user-hold with the given tag from the list of snapshots.
5277  */
5278 static int
5279 zfs_do_release(int argc, char **argv)
5280 {
5281         return (zfs_do_hold_rele_impl(argc, argv, B_FALSE));
5282 }
5283
5284 typedef struct holds_cbdata {
5285         boolean_t       cb_recursive;
5286         const char      *cb_snapname;
5287         nvlist_t        **cb_nvlp;
5288         size_t          cb_max_namelen;
5289         size_t          cb_max_taglen;
5290 } holds_cbdata_t;
5291
5292 #define STRFTIME_FMT_STR "%a %b %e %k:%M %Y"
5293 #define DATETIME_BUF_LEN (32)
5294 /*
5295  *
5296  */
5297 static void
5298 print_holds(boolean_t scripted, size_t nwidth, size_t tagwidth, nvlist_t *nvl)
5299 {
5300         int i;
5301         nvpair_t *nvp = NULL;
5302         char *hdr_cols[] = { "NAME", "TAG", "TIMESTAMP" };
5303         const char *col;
5304
5305         if (!scripted) {
5306                 for (i = 0; i < 3; i++) {
5307                         col = gettext(hdr_cols[i]);
5308                         if (i < 2)
5309                                 (void) printf("%-*s  ", i ? tagwidth : nwidth,
5310                                     col);
5311                         else
5312                                 (void) printf("%s\n", col);
5313                 }
5314         }
5315
5316         while ((nvp = nvlist_next_nvpair(nvl, nvp)) != NULL) {
5317                 char *zname = nvpair_name(nvp);
5318                 nvlist_t *nvl2;
5319                 nvpair_t *nvp2 = NULL;
5320                 (void) nvpair_value_nvlist(nvp, &nvl2);
5321                 while ((nvp2 = nvlist_next_nvpair(nvl2, nvp2)) != NULL) {
5322                         char tsbuf[DATETIME_BUF_LEN];
5323                         char *tagname = nvpair_name(nvp2);
5324                         uint64_t val = 0;
5325                         time_t time;
5326                         struct tm t;
5327                         char sep = scripted ? '\t' : ' ';
5328                         size_t sepnum = scripted ? 1 : 2;
5329
5330                         (void) nvpair_value_uint64(nvp2, &val);
5331                         time = (time_t)val;
5332                         (void) localtime_r(&time, &t);
5333                         (void) strftime(tsbuf, DATETIME_BUF_LEN,
5334                             gettext(STRFTIME_FMT_STR), &t);
5335
5336                         (void) printf("%-*s%*c%-*s%*c%s\n", nwidth, zname,
5337                             sepnum, sep, tagwidth, tagname, sepnum, sep, tsbuf);
5338                 }
5339         }
5340 }
5341
5342 /*
5343  * Generic callback function to list a dataset or snapshot.
5344  */
5345 static int
5346 holds_callback(zfs_handle_t *zhp, void *data)
5347 {
5348         holds_cbdata_t *cbp = data;
5349         nvlist_t *top_nvl = *cbp->cb_nvlp;
5350         nvlist_t *nvl = NULL;
5351         nvpair_t *nvp = NULL;
5352         const char *zname = zfs_get_name(zhp);
5353         size_t znamelen = strnlen(zname, ZFS_MAXNAMELEN);
5354
5355         if (cbp->cb_recursive) {
5356                 const char *snapname;
5357                 char *delim  = strchr(zname, '@');
5358                 if (delim == NULL)
5359                         return (0);
5360
5361                 snapname = delim + 1;
5362                 if (strcmp(cbp->cb_snapname, snapname))
5363                         return (0);
5364         }
5365
5366         if (zfs_get_holds(zhp, &nvl) != 0)
5367                 return (-1);
5368
5369         if (znamelen > cbp->cb_max_namelen)
5370                 cbp->cb_max_namelen  = znamelen;
5371
5372         while ((nvp = nvlist_next_nvpair(nvl, nvp)) != NULL) {
5373                 const char *tag = nvpair_name(nvp);
5374                 size_t taglen = strnlen(tag, MAXNAMELEN);
5375                 if (taglen > cbp->cb_max_taglen)
5376                         cbp->cb_max_taglen  = taglen;
5377         }
5378
5379         return (nvlist_add_nvlist(top_nvl, zname, nvl));
5380 }
5381
5382 /*
5383  * zfs holds [-r] <snap> ...
5384  *
5385  *      -r      Recursively hold
5386  */
5387 static int
5388 zfs_do_holds(int argc, char **argv)
5389 {
5390         int errors = 0;
5391         int c;
5392         int i;
5393         boolean_t scripted = B_FALSE;
5394         boolean_t recursive = B_FALSE;
5395         const char *opts = "rH";
5396         nvlist_t *nvl;
5397
5398         int types = ZFS_TYPE_SNAPSHOT;
5399         holds_cbdata_t cb = { 0 };
5400
5401         int limit = 0;
5402         int ret = 0;
5403         int flags = 0;
5404
5405         /* check options */
5406         while ((c = getopt(argc, argv, opts)) != -1) {
5407                 switch (c) {
5408                 case 'r':
5409                         recursive = B_TRUE;
5410                         break;
5411                 case 'H':
5412                         scripted = B_TRUE;
5413                         break;
5414                 case '?':
5415                         (void) fprintf(stderr, gettext("invalid option '%c'\n"),
5416                             optopt);
5417                         usage(B_FALSE);
5418                 }
5419         }
5420
5421         if (recursive) {
5422                 types |= ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME;
5423                 flags |= ZFS_ITER_RECURSE;
5424         }
5425
5426         argc -= optind;
5427         argv += optind;
5428
5429         /* check number of arguments */
5430         if (argc < 1)
5431                 usage(B_FALSE);
5432
5433         if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0) != 0)
5434                 nomem();
5435
5436         for (i = 0; i < argc; ++i) {
5437                 char *snapshot = argv[i];
5438                 const char *delim;
5439                 const char *snapname;
5440
5441                 delim = strchr(snapshot, '@');
5442                 if (delim == NULL) {
5443                         (void) fprintf(stderr,
5444                             gettext("'%s' is not a snapshot\n"), snapshot);
5445                         ++errors;
5446                         continue;
5447                 }
5448                 snapname = delim + 1;
5449                 if (recursive)
5450                         snapshot[delim - snapshot] = '\0';
5451
5452                 cb.cb_recursive = recursive;
5453                 cb.cb_snapname = snapname;
5454                 cb.cb_nvlp = &nvl;
5455
5456                 /*
5457                  *  1. collect holds data, set format options
5458                  */
5459                 ret = zfs_for_each(argc, argv, flags, types, NULL, NULL, limit,
5460                     holds_callback, &cb);
5461                 if (ret != 0)
5462                         ++errors;
5463         }
5464
5465         /*
5466          *  2. print holds data
5467          */
5468         print_holds(scripted, cb.cb_max_namelen, cb.cb_max_taglen, nvl);
5469
5470         if (nvlist_empty(nvl))
5471                 (void) printf(gettext("no datasets available\n"));
5472
5473         nvlist_free(nvl);
5474
5475         return (0 != errors);
5476 }
5477
5478 #define CHECK_SPINNER 30
5479 #define SPINNER_TIME 3          /* seconds */
5480 #define MOUNT_TIME 5            /* seconds */
5481
5482 static int
5483 get_one_dataset(zfs_handle_t *zhp, void *data)
5484 {
5485         static char *spin[] = { "-", "\\", "|", "/" };
5486         static int spinval = 0;
5487         static int spincheck = 0;
5488         static time_t last_spin_time = (time_t)0;
5489         get_all_cb_t *cbp = data;
5490         zfs_type_t type = zfs_get_type(zhp);
5491
5492         if (cbp->cb_verbose) {
5493                 if (--spincheck < 0) {
5494                         time_t now = time(NULL);
5495                         if (last_spin_time + SPINNER_TIME < now) {
5496                                 update_progress(spin[spinval++ % 4]);
5497                                 last_spin_time = now;
5498                         }
5499                         spincheck = CHECK_SPINNER;
5500                 }
5501         }
5502
5503         /*
5504          * Interate over any nested datasets.
5505          */
5506         if (zfs_iter_filesystems(zhp, get_one_dataset, data) != 0) {
5507                 zfs_close(zhp);
5508                 return (1);
5509         }
5510
5511         /*
5512          * Skip any datasets whose type does not match.
5513          */
5514         if ((type & ZFS_TYPE_FILESYSTEM) == 0) {
5515                 zfs_close(zhp);
5516                 return (0);
5517         }
5518         libzfs_add_handle(cbp, zhp);
5519         assert(cbp->cb_used <= cbp->cb_alloc);
5520
5521         return (0);
5522 }
5523
5524 static void
5525 get_all_datasets(zfs_handle_t ***dslist, size_t *count, boolean_t verbose)
5526 {
5527         get_all_cb_t cb = { 0 };
5528         cb.cb_verbose = verbose;
5529         cb.cb_getone = get_one_dataset;
5530
5531         if (verbose)
5532                 set_progress_header(gettext("Reading ZFS config"));
5533         (void) zfs_iter_root(g_zfs, get_one_dataset, &cb);
5534
5535         *dslist = cb.cb_handles;
5536         *count = cb.cb_used;
5537
5538         if (verbose)
5539                 finish_progress(gettext("done."));
5540 }
5541
5542 /*
5543  * Generic callback for sharing or mounting filesystems.  Because the code is so
5544  * similar, we have a common function with an extra parameter to determine which
5545  * mode we are using.
5546  */
5547 #define OP_SHARE        0x1
5548 #define OP_MOUNT        0x2
5549
5550 /*
5551  * Share or mount a dataset.
5552  */
5553 static int
5554 share_mount_one(zfs_handle_t *zhp, int op, int flags, char *protocol,
5555     boolean_t explicit, const char *options)
5556 {
5557         char mountpoint[ZFS_MAXPROPLEN];
5558         char shareopts[ZFS_MAXPROPLEN];
5559         char smbshareopts[ZFS_MAXPROPLEN];
5560         const char *cmdname = op == OP_SHARE ? "share" : "mount";
5561         struct mnttab mnt;
5562         uint64_t zoned, canmount;
5563         boolean_t shared_nfs, shared_smb;
5564
5565         assert(zfs_get_type(zhp) & ZFS_TYPE_FILESYSTEM);
5566
5567         /*
5568          * Check to make sure we can mount/share this dataset.  If we
5569          * are in the global zone and the filesystem is exported to a
5570          * local zone, or if we are in a local zone and the
5571          * filesystem is not exported, then it is an error.
5572          */
5573         zoned = zfs_prop_get_int(zhp, ZFS_PROP_ZONED);
5574
5575         if (zoned && getzoneid() == GLOBAL_ZONEID) {
5576                 if (!explicit)
5577                         return (0);
5578
5579                 (void) fprintf(stderr, gettext("cannot %s '%s': "
5580                     "dataset is exported to a local zone\n"), cmdname,
5581                     zfs_get_name(zhp));
5582                 return (1);
5583
5584         } else if (!zoned && getzoneid() != GLOBAL_ZONEID) {
5585                 if (!explicit)
5586                         return (0);
5587
5588                 (void) fprintf(stderr, gettext("cannot %s '%s': "
5589                     "permission denied\n"), cmdname,
5590                     zfs_get_name(zhp));
5591                 return (1);
5592         }
5593
5594         /*
5595          * Ignore any filesystems which don't apply to us. This
5596          * includes those with a legacy mountpoint, or those with
5597          * legacy share options.
5598          */
5599         verify(zfs_prop_get(zhp, ZFS_PROP_MOUNTPOINT, mountpoint,
5600             sizeof (mountpoint), NULL, NULL, 0, B_FALSE) == 0);
5601         verify(zfs_prop_get(zhp, ZFS_PROP_SHARENFS, shareopts,
5602             sizeof (shareopts), NULL, NULL, 0, B_FALSE) == 0);
5603         verify(zfs_prop_get(zhp, ZFS_PROP_SHARESMB, smbshareopts,
5604             sizeof (smbshareopts), NULL, NULL, 0, B_FALSE) == 0);
5605
5606         if (op == OP_SHARE && strcmp(shareopts, "off") == 0 &&
5607             strcmp(smbshareopts, "off") == 0) {
5608                 if (!explicit)
5609                         return (0);
5610
5611                 (void) fprintf(stderr, gettext("cannot share '%s': "
5612                     "legacy share\n"), zfs_get_name(zhp));
5613                 (void) fprintf(stderr, gettext("to "
5614                     "share this filesystem set "
5615                     "sharenfs property on\n"));
5616                 return (1);
5617         }
5618
5619         /*
5620          * We cannot share or mount legacy filesystems. If the
5621          * shareopts is non-legacy but the mountpoint is legacy, we
5622          * treat it as a legacy share.
5623          */
5624         if (strcmp(mountpoint, "legacy") == 0) {
5625                 if (!explicit)
5626                         return (0);
5627
5628                 (void) fprintf(stderr, gettext("cannot %s '%s': "
5629                     "legacy mountpoint\n"), cmdname, zfs_get_name(zhp));
5630                 (void) fprintf(stderr, gettext("use %s(8) to "
5631                     "%s this filesystem\n"), cmdname, cmdname);
5632                 return (1);
5633         }
5634
5635         if (strcmp(mountpoint, "none") == 0) {
5636                 if (!explicit)
5637                         return (0);
5638
5639                 (void) fprintf(stderr, gettext("cannot %s '%s': no "
5640                     "mountpoint set\n"), cmdname, zfs_get_name(zhp));
5641                 return (1);
5642         }
5643
5644         /*
5645          * canmount     explicit        outcome
5646          * on           no              pass through
5647          * on           yes             pass through
5648          * off          no              return 0
5649          * off          yes             display error, return 1
5650          * noauto       no              return 0
5651          * noauto       yes             pass through
5652          */
5653         canmount = zfs_prop_get_int(zhp, ZFS_PROP_CANMOUNT);
5654         if (canmount == ZFS_CANMOUNT_OFF) {
5655                 if (!explicit)
5656                         return (0);
5657
5658                 (void) fprintf(stderr, gettext("cannot %s '%s': "
5659                     "'canmount' property is set to 'off'\n"), cmdname,
5660                     zfs_get_name(zhp));
5661                 return (1);
5662         } else if (canmount == ZFS_CANMOUNT_NOAUTO && !explicit) {
5663                 return (0);
5664         }
5665
5666         /*
5667          * At this point, we have verified that the mountpoint and/or
5668          * shareopts are appropriate for auto management. If the
5669          * filesystem is already mounted or shared, return (failing
5670          * for explicit requests); otherwise mount or share the
5671          * filesystem.
5672          */
5673         switch (op) {
5674         case OP_SHARE:
5675
5676                 shared_nfs = zfs_is_shared_nfs(zhp, NULL);
5677                 shared_smb = zfs_is_shared_smb(zhp, NULL);
5678
5679                 if (shared_nfs && shared_smb ||
5680                     (shared_nfs && strcmp(shareopts, "on") == 0 &&
5681                     strcmp(smbshareopts, "off") == 0) ||
5682                     (shared_smb && strcmp(smbshareopts, "on") == 0 &&
5683                     strcmp(shareopts, "off") == 0)) {
5684                         if (!explicit)
5685                                 return (0);
5686
5687                         (void) fprintf(stderr, gettext("cannot share "
5688                             "'%s': filesystem already shared\n"),
5689                             zfs_get_name(zhp));
5690                         return (1);
5691                 }
5692
5693                 if (!zfs_is_mounted(zhp, NULL) &&
5694                     zfs_mount(zhp, NULL, 0) != 0)
5695                         return (1);
5696
5697                 if (protocol == NULL) {
5698                         if (zfs_shareall(zhp) != 0)
5699                                 return (1);
5700                 } else if (strcmp(protocol, "nfs") == 0) {
5701                         if (zfs_share_nfs(zhp))
5702                                 return (1);
5703                 } else if (strcmp(protocol, "smb") == 0) {
5704                         if (zfs_share_smb(zhp))
5705                                 return (1);
5706                 } else {
5707                         (void) fprintf(stderr, gettext("cannot share "
5708                             "'%s': invalid share type '%s' "
5709                             "specified\n"),
5710                             zfs_get_name(zhp), protocol);
5711                         return (1);
5712                 }
5713
5714                 break;
5715
5716         case OP_MOUNT:
5717                 if (options == NULL)
5718                         mnt.mnt_mntopts = "";
5719                 else
5720                         mnt.mnt_mntopts = (char *)options;
5721
5722                 if (!hasmntopt(&mnt, MNTOPT_REMOUNT) &&
5723                     zfs_is_mounted(zhp, NULL)) {
5724                         if (!explicit)
5725                                 return (0);
5726
5727                         (void) fprintf(stderr, gettext("cannot mount "
5728                             "'%s': filesystem already mounted\n"),
5729                             zfs_get_name(zhp));
5730                         return (1);
5731                 }
5732
5733                 if (zfs_mount(zhp, options, flags) != 0)
5734                         return (1);
5735                 break;
5736         }
5737
5738         return (0);
5739 }
5740
5741 /*
5742  * Reports progress in the form "(current/total)".  Not thread-safe.
5743  */
5744 static void
5745 report_mount_progress(int current, int total)
5746 {
5747         static time_t last_progress_time = 0;
5748         time_t now = time(NULL);
5749         char info[32];
5750
5751         /* report 1..n instead of 0..n-1 */
5752         ++current;
5753
5754         /* display header if we're here for the first time */
5755         if (current == 1) {
5756                 set_progress_header(gettext("Mounting ZFS filesystems"));
5757         } else if (current != total && last_progress_time + MOUNT_TIME >= now) {
5758                 /* too soon to report again */
5759                 return;
5760         }
5761
5762         last_progress_time = now;
5763
5764         (void) sprintf(info, "(%d/%d)", current, total);
5765
5766         if (current == total)
5767                 finish_progress(info);
5768         else
5769                 update_progress(info);
5770 }
5771
5772 static void
5773 append_options(char *mntopts, char *newopts)
5774 {
5775         int len = strlen(mntopts);
5776
5777         /* original length plus new string to append plus 1 for the comma */
5778         if (len + 1 + strlen(newopts) >= MNT_LINE_MAX) {
5779                 (void) fprintf(stderr, gettext("the opts argument for "
5780                     "'%c' option is too long (more than %d chars)\n"),
5781                     "-o", MNT_LINE_MAX);
5782                 usage(B_FALSE);
5783         }
5784
5785         if (*mntopts)
5786                 mntopts[len++] = ',';
5787
5788         (void) strcpy(&mntopts[len], newopts);
5789 }
5790
5791 static int
5792 share_mount(int op, int argc, char **argv)
5793 {
5794         int do_all = 0;
5795         boolean_t verbose = B_FALSE;
5796         int c, ret = 0;
5797         char *options = NULL;
5798         int flags = 0;
5799
5800         /* check options */
5801         while ((c = getopt(argc, argv, op == OP_MOUNT ? ":avo:O" : "a"))
5802             != -1) {
5803                 switch (c) {
5804                 case 'a':
5805                         do_all = 1;
5806                         break;
5807                 case 'v':
5808                         verbose = B_TRUE;
5809                         break;
5810                 case 'o':
5811                         if (*optarg == '\0') {
5812                                 (void) fprintf(stderr, gettext("empty mount "
5813                                     "options (-o) specified\n"));
5814                                 usage(B_FALSE);
5815                         }
5816
5817                         if (options == NULL)
5818                                 options = safe_malloc(MNT_LINE_MAX + 1);
5819
5820                         /* option validation is done later */
5821                         append_options(options, optarg);
5822                         break;
5823
5824                 case 'O':
5825                         warnx("no overlay mounts support on FreeBSD, ignoring");
5826                         break;
5827                 case ':':
5828                         (void) fprintf(stderr, gettext("missing argument for "
5829                             "'%c' option\n"), optopt);
5830                         usage(B_FALSE);
5831                         break;
5832                 case '?':
5833                         (void) fprintf(stderr, gettext("invalid option '%c'\n"),
5834                             optopt);
5835                         usage(B_FALSE);
5836                 }
5837         }
5838
5839         argc -= optind;
5840         argv += optind;
5841
5842         /* check number of arguments */
5843         if (do_all) {
5844                 zfs_handle_t **dslist = NULL;
5845                 size_t i, count = 0;
5846                 char *protocol = NULL;
5847
5848                 if (op == OP_SHARE && argc > 0) {
5849                         if (strcmp(argv[0], "nfs") != 0 &&
5850                             strcmp(argv[0], "smb") != 0) {
5851                                 (void) fprintf(stderr, gettext("share type "
5852                                     "must be 'nfs' or 'smb'\n"));
5853                                 usage(B_FALSE);
5854                         }
5855                         protocol = argv[0];
5856                         argc--;
5857                         argv++;
5858                 }
5859
5860                 if (argc != 0) {
5861                         (void) fprintf(stderr, gettext("too many arguments\n"));
5862                         usage(B_FALSE);
5863                 }
5864
5865                 start_progress_timer();
5866                 get_all_datasets(&dslist, &count, verbose);
5867
5868                 if (count == 0)
5869                         return (0);
5870
5871                 qsort(dslist, count, sizeof (void *), libzfs_dataset_cmp);
5872
5873                 for (i = 0; i < count; i++) {
5874                         if (verbose)
5875                                 report_mount_progress(i, count);
5876
5877                         if (share_mount_one(dslist[i], op, flags, protocol,
5878                             B_FALSE, options) != 0)
5879                                 ret = 1;
5880                         zfs_close(dslist[i]);
5881                 }
5882
5883                 free(dslist);
5884         } else if (argc == 0) {
5885                 struct mnttab entry;
5886
5887                 if ((op == OP_SHARE) || (options != NULL)) {
5888                         (void) fprintf(stderr, gettext("missing filesystem "
5889                             "argument (specify -a for all)\n"));
5890                         usage(B_FALSE);
5891                 }
5892
5893                 /*
5894                  * When mount is given no arguments, go through /etc/mnttab and
5895                  * display any active ZFS mounts.  We hide any snapshots, since
5896                  * they are controlled automatically.
5897                  */
5898                 rewind(mnttab_file);
5899                 while (getmntent(mnttab_file, &entry) == 0) {
5900                         if (strcmp(entry.mnt_fstype, MNTTYPE_ZFS) != 0 ||
5901                             strchr(entry.mnt_special, '@') != NULL)
5902                                 continue;
5903
5904                         (void) printf("%-30s  %s\n", entry.mnt_special,
5905                             entry.mnt_mountp);
5906                 }
5907
5908         } else {
5909                 zfs_handle_t *zhp;
5910
5911                 if (argc > 1) {
5912                         (void) fprintf(stderr,
5913                             gettext("too many arguments\n"));
5914                         usage(B_FALSE);
5915                 }
5916
5917                 if ((zhp = zfs_open(g_zfs, argv[0],
5918                     ZFS_TYPE_FILESYSTEM)) == NULL) {
5919                         ret = 1;
5920                 } else {
5921                         ret = share_mount_one(zhp, op, flags, NULL, B_TRUE,
5922                             options);
5923                         zfs_close(zhp);
5924                 }
5925         }
5926
5927         return (ret);
5928 }
5929
5930 /*
5931  * zfs mount -a [nfs]
5932  * zfs mount filesystem
5933  *
5934  * Mount all filesystems, or mount the given filesystem.
5935  */
5936 static int
5937 zfs_do_mount(int argc, char **argv)
5938 {
5939         return (share_mount(OP_MOUNT, argc, argv));
5940 }
5941
5942 /*
5943  * zfs share -a [nfs | smb]
5944  * zfs share filesystem
5945  *
5946  * Share all filesystems, or share the given filesystem.
5947  */
5948 static int
5949 zfs_do_share(int argc, char **argv)
5950 {
5951         return (share_mount(OP_SHARE, argc, argv));
5952 }
5953
5954 typedef struct unshare_unmount_node {
5955         zfs_handle_t    *un_zhp;
5956         char            *un_mountp;
5957         uu_avl_node_t   un_avlnode;
5958 } unshare_unmount_node_t;
5959
5960 /* ARGSUSED */
5961 static int
5962 unshare_unmount_compare(const void *larg, const void *rarg, void *unused)
5963 {
5964         const unshare_unmount_node_t *l = larg;
5965         const unshare_unmount_node_t *r = rarg;
5966
5967         return (strcmp(l->un_mountp, r->un_mountp));
5968 }
5969
5970 /*
5971  * Convenience routine used by zfs_do_umount() and manual_unmount().  Given an
5972  * absolute path, find the entry /etc/mnttab, verify that its a ZFS filesystem,
5973  * and unmount it appropriately.
5974  */
5975 static int
5976 unshare_unmount_path(int op, char *path, int flags, boolean_t is_manual)
5977 {
5978         zfs_handle_t *zhp;
5979         int ret = 0;
5980         struct stat64 statbuf;
5981         struct extmnttab entry;
5982         const char *cmdname = (op == OP_SHARE) ? "unshare" : "unmount";
5983         ino_t path_inode;
5984
5985         /*
5986          * Search for the path in /etc/mnttab.  Rather than looking for the
5987          * specific path, which can be fooled by non-standard paths (i.e. ".."
5988          * or "//"), we stat() the path and search for the corresponding
5989          * (major,minor) device pair.
5990          */
5991         if (stat64(path, &statbuf) != 0) {
5992                 (void) fprintf(stderr, gettext("cannot %s '%s': %s\n"),
5993                     cmdname, path, strerror(errno));
5994                 return (1);
5995         }
5996         path_inode = statbuf.st_ino;
5997
5998         /*
5999          * Search for the given (major,minor) pair in the mount table.
6000          */
6001 #ifdef sun
6002         rewind(mnttab_file);
6003         while ((ret = getextmntent(mnttab_file, &entry, 0)) == 0) {
6004                 if (entry.mnt_major == major(statbuf.st_dev) &&
6005                     entry.mnt_minor == minor(statbuf.st_dev))
6006                         break;
6007         }
6008 #else
6009         {
6010                 struct statfs sfs;
6011
6012                 if (statfs(path, &sfs) != 0) {
6013                         (void) fprintf(stderr, "%s: %s\n", path,
6014                             strerror(errno));
6015                         ret = -1;
6016                 }
6017                 statfs2mnttab(&sfs, &entry);
6018         }
6019 #endif
6020         if (ret != 0) {
6021                 if (op == OP_SHARE) {
6022                         (void) fprintf(stderr, gettext("cannot %s '%s': not "
6023                             "currently mounted\n"), cmdname, path);
6024                         return (1);
6025                 }
6026                 (void) fprintf(stderr, gettext("warning: %s not in mnttab\n"),
6027                     path);
6028                 if ((ret = umount2(path, flags)) != 0)
6029                         (void) fprintf(stderr, gettext("%s: %s\n"), path,
6030                             strerror(errno));
6031                 return (ret != 0);
6032         }
6033
6034         if (strcmp(entry.mnt_fstype, MNTTYPE_ZFS) != 0) {
6035                 (void) fprintf(stderr, gettext("cannot %s '%s': not a ZFS "
6036                     "filesystem\n"), cmdname, path);
6037                 return (1);
6038         }
6039
6040         if ((zhp = zfs_open(g_zfs, entry.mnt_special,
6041             ZFS_TYPE_FILESYSTEM)) == NULL)
6042                 return (1);
6043
6044         ret = 1;
6045         if (stat64(entry.mnt_mountp, &statbuf) != 0) {
6046                 (void) fprintf(stderr, gettext("cannot %s '%s': %s\n"),
6047                     cmdname, path, strerror(errno));
6048                 goto out;
6049         } else if (statbuf.st_ino != path_inode) {
6050                 (void) fprintf(stderr, gettext("cannot "
6051                     "%s '%s': not a mountpoint\n"), cmdname, path);
6052                 goto out;
6053         }
6054
6055         if (op == OP_SHARE) {
6056                 char nfs_mnt_prop[ZFS_MAXPROPLEN];
6057                 char smbshare_prop[ZFS_MAXPROPLEN];
6058
6059                 verify(zfs_prop_get(zhp, ZFS_PROP_SHARENFS, nfs_mnt_prop,
6060                     sizeof (nfs_mnt_prop), NULL, NULL, 0, B_FALSE) == 0);
6061                 verify(zfs_prop_get(zhp, ZFS_PROP_SHARESMB, smbshare_prop,
6062                     sizeof (smbshare_prop), NULL, NULL, 0, B_FALSE) == 0);
6063
6064                 if (strcmp(nfs_mnt_prop, "off") == 0 &&
6065                     strcmp(smbshare_prop, "off") == 0) {
6066                         (void) fprintf(stderr, gettext("cannot unshare "
6067                             "'%s': legacy share\n"), path);
6068 #ifdef illumos
6069                         (void) fprintf(stderr, gettext("use "
6070                             "unshare(1M) to unshare this filesystem\n"));
6071 #endif
6072                 } else if (!zfs_is_shared(zhp)) {
6073                         (void) fprintf(stderr, gettext("cannot unshare '%s': "
6074                             "not currently shared\n"), path);
6075                 } else {
6076                         ret = zfs_unshareall_bypath(zhp, path);
6077                 }
6078         } else {
6079                 char mtpt_prop[ZFS_MAXPROPLEN];
6080
6081                 verify(zfs_prop_get(zhp, ZFS_PROP_MOUNTPOINT, mtpt_prop,
6082                     sizeof (mtpt_prop), NULL, NULL, 0, B_FALSE) == 0);
6083
6084                 if (is_manual) {
6085                         ret = zfs_unmount(zhp, NULL, flags);
6086                 } else if (strcmp(mtpt_prop, "legacy") == 0) {
6087                         (void) fprintf(stderr, gettext("cannot unmount "
6088                             "'%s': legacy mountpoint\n"),
6089                             zfs_get_name(zhp));
6090                         (void) fprintf(stderr, gettext("use umount(8) "
6091                             "to unmount this filesystem\n"));
6092                 } else {
6093                         ret = zfs_unmountall(zhp, flags);
6094                 }
6095         }
6096
6097 out:
6098         zfs_close(zhp);
6099
6100         return (ret != 0);
6101 }
6102
6103 /*
6104  * Generic callback for unsharing or unmounting a filesystem.
6105  */
6106 static int
6107 unshare_unmount(int op, int argc, char **argv)
6108 {
6109         int do_all = 0;
6110         int flags = 0;
6111         int ret = 0;
6112         int c;
6113         zfs_handle_t *zhp;
6114         char nfs_mnt_prop[ZFS_MAXPROPLEN];
6115         char sharesmb[ZFS_MAXPROPLEN];
6116
6117         /* check options */
6118         while ((c = getopt(argc, argv, op == OP_SHARE ? "a" : "af")) != -1) {
6119                 switch (c) {
6120                 case 'a':
6121                         do_all = 1;
6122                         break;
6123                 case 'f':
6124                         flags = MS_FORCE;
6125                         break;
6126                 case '?':
6127                         (void) fprintf(stderr, gettext("invalid option '%c'\n"),
6128                             optopt);
6129                         usage(B_FALSE);
6130                 }
6131         }
6132
6133         argc -= optind;
6134         argv += optind;
6135
6136         if (do_all) {
6137                 /*
6138                  * We could make use of zfs_for_each() to walk all datasets in
6139                  * the system, but this would be very inefficient, especially
6140                  * since we would have to linearly search /etc/mnttab for each
6141                  * one.  Instead, do one pass through /etc/mnttab looking for
6142                  * zfs entries and call zfs_unmount() for each one.
6143                  *
6144                  * Things get a little tricky if the administrator has created
6145                  * mountpoints beneath other ZFS filesystems.  In this case, we
6146                  * have to unmount the deepest filesystems first.  To accomplish
6147                  * this, we place all the mountpoints in an AVL tree sorted by
6148                  * the special type (dataset name), and walk the result in
6149                  * reverse to make sure to get any snapshots first.
6150                  */
6151                 struct mnttab entry;
6152                 uu_avl_pool_t *pool;
6153                 uu_avl_t *tree;
6154                 unshare_unmount_node_t *node;
6155                 uu_avl_index_t idx;
6156                 uu_avl_walk_t *walk;
6157
6158                 if (argc != 0) {
6159                         (void) fprintf(stderr, gettext("too many arguments\n"));
6160                         usage(B_FALSE);
6161                 }
6162
6163                 if (((pool = uu_avl_pool_create("unmount_pool",
6164                     sizeof (unshare_unmount_node_t),
6165                     offsetof(unshare_unmount_node_t, un_avlnode),
6166                     unshare_unmount_compare, UU_DEFAULT)) == NULL) ||
6167                     ((tree = uu_avl_create(pool, NULL, UU_DEFAULT)) == NULL))
6168                         nomem();
6169
6170                 rewind(mnttab_file);
6171                 while (getmntent(mnttab_file, &entry) == 0) {
6172
6173                         /* ignore non-ZFS entries */
6174                         if (strcmp(entry.mnt_fstype, MNTTYPE_ZFS) != 0)
6175                                 continue;
6176
6177                         /* ignore snapshots */
6178                         if (strchr(entry.mnt_special, '@') != NULL)
6179                                 continue;
6180
6181                         if ((zhp = zfs_open(g_zfs, entry.mnt_special,
6182                             ZFS_TYPE_FILESYSTEM)) == NULL) {
6183                                 ret = 1;
6184                                 continue;
6185                         }
6186
6187                         switch (op) {
6188                         case OP_SHARE:
6189                                 verify(zfs_prop_get(zhp, ZFS_PROP_SHARENFS,
6190                                     nfs_mnt_prop,
6191                                     sizeof (nfs_mnt_prop),
6192                                     NULL, NULL, 0, B_FALSE) == 0);
6193                                 if (strcmp(nfs_mnt_prop, "off") != 0)
6194                                         break;
6195                                 verify(zfs_prop_get(zhp, ZFS_PROP_SHARESMB,
6196                                     nfs_mnt_prop,
6197                                     sizeof (nfs_mnt_prop),
6198                                     NULL, NULL, 0, B_FALSE) == 0);
6199                                 if (strcmp(nfs_mnt_prop, "off") == 0)
6200                                         continue;
6201                                 break;
6202                         case OP_MOUNT:
6203                                 /* Ignore legacy mounts */
6204                                 verify(zfs_prop_get(zhp, ZFS_PROP_MOUNTPOINT,
6205                                     nfs_mnt_prop,
6206                                     sizeof (nfs_mnt_prop),
6207                                     NULL, NULL, 0, B_FALSE) == 0);
6208                                 if (strcmp(nfs_mnt_prop, "legacy") == 0)
6209                                         continue;
6210                                 /* Ignore canmount=noauto mounts */
6211                                 if (zfs_prop_get_int(zhp, ZFS_PROP_CANMOUNT) ==
6212                                     ZFS_CANMOUNT_NOAUTO)
6213                                         continue;
6214                         default:
6215                                 break;
6216                         }
6217
6218                         node = safe_malloc(sizeof (unshare_unmount_node_t));
6219                         node->un_zhp = zhp;
6220                         node->un_mountp = safe_strdup(entry.mnt_mountp);
6221
6222                         uu_avl_node_init(node, &node->un_avlnode, pool);
6223
6224                         if (uu_avl_find(tree, node, NULL, &idx) == NULL) {
6225                                 uu_avl_insert(tree, node, idx);
6226                         } else {
6227                                 zfs_close(node->un_zhp);
6228                                 free(node->un_mountp);
6229                                 free(node);
6230                         }
6231                 }
6232
6233                 /*
6234                  * Walk the AVL tree in reverse, unmounting each filesystem and
6235                  * removing it from the AVL tree in the process.
6236                  */
6237                 if ((walk = uu_avl_walk_start(tree,
6238                     UU_WALK_REVERSE | UU_WALK_ROBUST)) == NULL)
6239                         nomem();
6240
6241                 while ((node = uu_avl_walk_next(walk)) != NULL) {
6242                         uu_avl_remove(tree, node);
6243
6244                         switch (op) {
6245                         case OP_SHARE:
6246                                 if (zfs_unshareall_bypath(node->un_zhp,
6247                                     node->un_mountp) != 0)
6248                                         ret = 1;
6249                                 break;
6250
6251                         case OP_MOUNT:
6252                                 if (zfs_unmount(node->un_zhp,
6253                                     node->un_mountp, flags) != 0)
6254                                         ret = 1;
6255                                 break;
6256                         }
6257
6258                         zfs_close(node->un_zhp);
6259                         free(node->un_mountp);
6260                         free(node);
6261                 }
6262
6263                 uu_avl_walk_end(walk);
6264                 uu_avl_destroy(tree);
6265                 uu_avl_pool_destroy(pool);
6266
6267         } else {
6268                 if (argc != 1) {
6269                         if (argc == 0)
6270                                 (void) fprintf(stderr,
6271                                     gettext("missing filesystem argument\n"));
6272                         else
6273                                 (void) fprintf(stderr,
6274                                     gettext("too many arguments\n"));
6275                         usage(B_FALSE);
6276                 }
6277
6278                 /*
6279                  * We have an argument, but it may be a full path or a ZFS
6280                  * filesystem.  Pass full paths off to unmount_path() (shared by
6281                  * manual_unmount), otherwise open the filesystem and pass to
6282                  * zfs_unmount().
6283                  */
6284                 if (argv[0][0] == '/')
6285                         return (unshare_unmount_path(op, argv[0],
6286                             flags, B_FALSE));
6287
6288                 if ((zhp = zfs_open(g_zfs, argv[0],
6289                     ZFS_TYPE_FILESYSTEM)) == NULL)
6290                         return (1);
6291
6292                 verify(zfs_prop_get(zhp, op == OP_SHARE ?
6293                     ZFS_PROP_SHARENFS : ZFS_PROP_MOUNTPOINT,
6294                     nfs_mnt_prop, sizeof (nfs_mnt_prop), NULL,
6295                     NULL, 0, B_FALSE) == 0);
6296
6297                 switch (op) {
6298                 case OP_SHARE:
6299                         verify(zfs_prop_get(zhp, ZFS_PROP_SHARENFS,
6300                             nfs_mnt_prop,
6301                             sizeof (nfs_mnt_prop),
6302                             NULL, NULL, 0, B_FALSE) == 0);
6303                         verify(zfs_prop_get(zhp, ZFS_PROP_SHARESMB,
6304                             sharesmb, sizeof (sharesmb), NULL, NULL,
6305                             0, B_FALSE) == 0);
6306
6307                         if (strcmp(nfs_mnt_prop, "off") == 0 &&
6308                             strcmp(sharesmb, "off") == 0) {
6309                                 (void) fprintf(stderr, gettext("cannot "
6310                                     "unshare '%s': legacy share\n"),
6311                                     zfs_get_name(zhp));
6312 #ifdef illumos
6313                                 (void) fprintf(stderr, gettext("use "
6314                                     "unshare(1M) to unshare this "
6315                                     "filesystem\n"));
6316 #endif
6317                                 ret = 1;
6318                         } else if (!zfs_is_shared(zhp)) {
6319                                 (void) fprintf(stderr, gettext("cannot "
6320                                     "unshare '%s': not currently "
6321                                     "shared\n"), zfs_get_name(zhp));
6322                                 ret = 1;
6323                         } else if (zfs_unshareall(zhp) != 0) {
6324                                 ret = 1;
6325                         }
6326                         break;
6327
6328                 case OP_MOUNT:
6329                         if (strcmp(nfs_mnt_prop, "legacy") == 0) {
6330                                 (void) fprintf(stderr, gettext("cannot "
6331                                     "unmount '%s': legacy "
6332                                     "mountpoint\n"), zfs_get_name(zhp));
6333                                 (void) fprintf(stderr, gettext("use "
6334                                     "umount(8) to unmount this "
6335                                     "filesystem\n"));
6336                                 ret = 1;
6337                         } else if (!zfs_is_mounted(zhp, NULL)) {
6338                                 (void) fprintf(stderr, gettext("cannot "
6339                                     "unmount '%s': not currently "
6340                                     "mounted\n"),
6341                                     zfs_get_name(zhp));
6342                                 ret = 1;
6343                         } else if (zfs_unmountall(zhp, flags) != 0) {
6344                                 ret = 1;
6345                         }
6346                         break;
6347                 }
6348
6349                 zfs_close(zhp);
6350         }
6351
6352         return (ret);
6353 }
6354
6355 /*
6356  * zfs unmount -a
6357  * zfs unmount filesystem
6358  *
6359  * Unmount all filesystems, or a specific ZFS filesystem.
6360  */
6361 static int
6362 zfs_do_unmount(int argc, char **argv)
6363 {
6364         return (unshare_unmount(OP_MOUNT, argc, argv));
6365 }
6366
6367 /*
6368  * zfs unshare -a
6369  * zfs unshare filesystem
6370  *
6371  * Unshare all filesystems, or a specific ZFS filesystem.
6372  */
6373 static int
6374 zfs_do_unshare(int argc, char **argv)
6375 {
6376         return (unshare_unmount(OP_SHARE, argc, argv));
6377 }
6378
6379 /*
6380  * Attach/detach the given dataset to/from the given jail
6381  */
6382 /* ARGSUSED */
6383 static int
6384 do_jail(int argc, char **argv, int attach)
6385 {
6386         zfs_handle_t *zhp;
6387         int jailid, ret;
6388
6389         /* check number of arguments */
6390         if (argc < 3) {
6391                 (void) fprintf(stderr, gettext("missing argument(s)\n"));
6392                 usage(B_FALSE);
6393         }
6394         if (argc > 3) {
6395                 (void) fprintf(stderr, gettext("too many arguments\n"));
6396                 usage(B_FALSE);
6397         }
6398
6399         jailid = jail_getid(argv[1]);
6400         if (jailid < 0) {
6401                 (void) fprintf(stderr, gettext("invalid jail id or name\n"));
6402                 usage(B_FALSE);
6403         }
6404
6405         zhp = zfs_open(g_zfs, argv[2], ZFS_TYPE_FILESYSTEM);
6406         if (zhp == NULL)
6407                 return (1);
6408
6409         ret = (zfs_jail(zhp, jailid, attach) != 0);
6410
6411         zfs_close(zhp);
6412         return (ret);
6413 }
6414
6415 /*
6416  * zfs jail jailid filesystem
6417  *
6418  * Attach the given dataset to the given jail
6419  */
6420 /* ARGSUSED */
6421 static int
6422 zfs_do_jail(int argc, char **argv)
6423 {
6424
6425         return (do_jail(argc, argv, 1));
6426 }
6427
6428 /*
6429  * zfs unjail jailid filesystem
6430  *
6431  * Detach the given dataset from the given jail
6432  */
6433 /* ARGSUSED */
6434 static int
6435 zfs_do_unjail(int argc, char **argv)
6436 {
6437
6438         return (do_jail(argc, argv, 0));
6439 }
6440
6441 /*
6442  * Called when invoked as /etc/fs/zfs/mount.  Do the mount if the mountpoint is
6443  * 'legacy'.  Otherwise, complain that use should be using 'zfs mount'.
6444  */
6445 static int
6446 manual_mount(int argc, char **argv)
6447 {
6448         zfs_handle_t *zhp;
6449         char mountpoint[ZFS_MAXPROPLEN];
6450         char mntopts[MNT_LINE_MAX] = { '\0' };
6451         int ret = 0;
6452         int c;
6453         int flags = 0;
6454         char *dataset, *path;
6455
6456         /* check options */
6457         while ((c = getopt(argc, argv, ":mo:O")) != -1) {
6458                 switch (c) {
6459                 case 'o':
6460                         (void) strlcpy(mntopts, optarg, sizeof (mntopts));
6461                         break;
6462                 case 'O':
6463                         flags |= MS_OVERLAY;
6464                         break;
6465                 case 'm':
6466                         flags |= MS_NOMNTTAB;
6467                         break;
6468                 case ':':
6469                         (void) fprintf(stderr, gettext("missing argument for "
6470                             "'%c' option\n"), optopt);
6471                         usage(B_FALSE);
6472                         break;
6473                 case '?':
6474                         (void) fprintf(stderr, gettext("invalid option '%c'\n"),
6475                             optopt);
6476                         (void) fprintf(stderr, gettext("usage: mount [-o opts] "
6477                             "<path>\n"));
6478                         return (2);
6479                 }
6480         }
6481
6482         argc -= optind;
6483         argv += optind;
6484
6485         /* check that we only have two arguments */
6486         if (argc != 2) {
6487                 if (argc == 0)
6488                         (void) fprintf(stderr, gettext("missing dataset "
6489                             "argument\n"));
6490                 else if (argc == 1)
6491                         (void) fprintf(stderr,
6492                             gettext("missing mountpoint argument\n"));
6493                 else
6494                         (void) fprintf(stderr, gettext("too many arguments\n"));
6495                 (void) fprintf(stderr, "usage: mount <dataset> <mountpoint>\n");
6496                 return (2);
6497         }
6498
6499         dataset = argv[0];
6500         path = argv[1];
6501
6502         /* try to open the dataset */
6503         if ((zhp = zfs_open(g_zfs, dataset, ZFS_TYPE_FILESYSTEM)) == NULL)
6504                 return (1);
6505
6506         (void) zfs_prop_get(zhp, ZFS_PROP_MOUNTPOINT, mountpoint,
6507             sizeof (mountpoint), NULL, NULL, 0, B_FALSE);
6508
6509         /* check for legacy mountpoint and complain appropriately */
6510         ret = 0;
6511         if (strcmp(mountpoint, ZFS_MOUNTPOINT_LEGACY) == 0) {
6512                 if (zmount(dataset, path, flags, MNTTYPE_ZFS,
6513                     NULL, 0, mntopts, sizeof (mntopts)) != 0) {
6514                         (void) fprintf(stderr, gettext("mount failed: %s\n"),
6515                             strerror(errno));
6516                         ret = 1;
6517                 }
6518         } else {
6519                 (void) fprintf(stderr, gettext("filesystem '%s' cannot be "
6520                     "mounted using 'mount -t zfs'\n"), dataset);
6521                 (void) fprintf(stderr, gettext("Use 'zfs set mountpoint=%s' "
6522                     "instead.\n"), path);
6523                 (void) fprintf(stderr, gettext("If you must use 'mount -t zfs' "
6524                     "or /etc/fstab, use 'zfs set mountpoint=legacy'.\n"));
6525                 (void) fprintf(stderr, gettext("See zfs(8) for more "
6526                     "information.\n"));
6527                 ret = 1;
6528         }
6529
6530         return (ret);
6531 }
6532
6533 /*
6534  * Called when invoked as /etc/fs/zfs/umount.  Unlike a manual mount, we allow
6535  * unmounts of non-legacy filesystems, as this is the dominant administrative
6536  * interface.
6537  */
6538 static int
6539 manual_unmount(int argc, char **argv)
6540 {
6541         int flags = 0;
6542         int c;
6543
6544         /* check options */
6545         while ((c = getopt(argc, argv, "f")) != -1) {
6546                 switch (c) {
6547                 case 'f':
6548                         flags = MS_FORCE;
6549                         break;
6550                 case '?':
6551                         (void) fprintf(stderr, gettext("invalid option '%c'\n"),
6552                             optopt);
6553                         (void) fprintf(stderr, gettext("usage: unmount [-f] "
6554                             "<path>\n"));
6555                         return (2);
6556                 }
6557         }
6558
6559         argc -= optind;
6560         argv += optind;
6561
6562         /* check arguments */
6563         if (argc != 1) {
6564                 if (argc == 0)
6565                         (void) fprintf(stderr, gettext("missing path "
6566                             "argument\n"));
6567                 else
6568                         (void) fprintf(stderr, gettext("too many arguments\n"));
6569                 (void) fprintf(stderr, gettext("usage: unmount [-f] <path>\n"));
6570                 return (2);
6571         }
6572
6573         return (unshare_unmount_path(OP_MOUNT, argv[0], flags, B_TRUE));
6574 }
6575
6576 static int
6577 find_command_idx(char *command, int *idx)
6578 {
6579         int i;
6580
6581         for (i = 0; i < NCOMMAND; i++) {
6582                 if (command_table[i].name == NULL)
6583                         continue;
6584
6585                 if (strcmp(command, command_table[i].name) == 0) {
6586                         *idx = i;
6587                         return (0);
6588                 }
6589         }
6590         return (1);
6591 }
6592
6593 static int
6594 zfs_do_diff(int argc, char **argv)
6595 {
6596         zfs_handle_t *zhp;
6597         int flags = 0;
6598         char *tosnap = NULL;
6599         char *fromsnap = NULL;
6600         char *atp, *copy;
6601         int err = 0;
6602         int c;
6603
6604         while ((c = getopt(argc, argv, "FHt")) != -1) {
6605                 switch (c) {
6606                 case 'F':
6607                         flags |= ZFS_DIFF_CLASSIFY;
6608                         break;
6609                 case 'H':
6610                         flags |= ZFS_DIFF_PARSEABLE;
6611                         break;
6612                 case 't':
6613                         flags |= ZFS_DIFF_TIMESTAMP;
6614                         break;
6615                 default:
6616                         (void) fprintf(stderr,
6617                             gettext("invalid option '%c'\n"), optopt);
6618                         usage(B_FALSE);
6619                 }
6620         }
6621
6622         argc -= optind;
6623         argv += optind;
6624
6625         if (argc < 1) {
6626                 (void) fprintf(stderr,
6627                 gettext("must provide at least one snapshot name\n"));
6628                 usage(B_FALSE);
6629         }
6630
6631         if (argc > 2) {
6632                 (void) fprintf(stderr, gettext("too many arguments\n"));
6633                 usage(B_FALSE);
6634         }
6635
6636         fromsnap = argv[0];
6637         tosnap = (argc == 2) ? argv[1] : NULL;
6638
6639         copy = NULL;
6640         if (*fromsnap != '@')
6641                 copy = strdup(fromsnap);
6642         else if (tosnap)
6643                 copy = strdup(tosnap);
6644         if (copy == NULL)
6645                 usage(B_FALSE);
6646
6647         if (atp = strchr(copy, '@'))
6648                 *atp = '\0';
6649
6650         if ((zhp = zfs_open(g_zfs, copy, ZFS_TYPE_FILESYSTEM)) == NULL)
6651                 return (1);
6652
6653         free(copy);
6654
6655         /*
6656          * Ignore SIGPIPE so that the library can give us
6657          * information on any failure
6658          */
6659         (void) sigignore(SIGPIPE);
6660
6661         err = zfs_show_diffs(zhp, STDOUT_FILENO, fromsnap, tosnap, flags);
6662
6663         zfs_close(zhp);
6664
6665         return (err != 0);
6666 }
6667
6668 int
6669 main(int argc, char **argv)
6670 {
6671         int ret = 0;
6672         int i;
6673         char *progname;
6674         char *cmdname;
6675
6676         (void) setlocale(LC_ALL, "");
6677         (void) textdomain(TEXT_DOMAIN);
6678
6679         opterr = 0;
6680
6681         if ((g_zfs = libzfs_init()) == NULL) {
6682                 (void) fprintf(stderr, gettext("internal error: failed to "
6683                     "initialize ZFS library\n"));
6684                 return (1);
6685         }
6686
6687         zfs_save_arguments(argc, argv, history_str, sizeof (history_str));
6688
6689         libzfs_print_on_error(g_zfs, B_TRUE);
6690
6691         if ((mnttab_file = fopen(MNTTAB, "r")) == NULL) {
6692                 (void) fprintf(stderr, gettext("internal error: unable to "
6693                     "open %s\n"), MNTTAB);
6694                 return (1);
6695         }
6696
6697         /*
6698          * This command also doubles as the /etc/fs mount and unmount program.
6699          * Determine if we should take this behavior based on argv[0].
6700          */
6701         progname = basename(argv[0]);
6702         if (strcmp(progname, "mount") == 0) {
6703                 ret = manual_mount(argc, argv);
6704         } else if (strcmp(progname, "umount") == 0) {
6705                 ret = manual_unmount(argc, argv);
6706         } else {
6707                 /*
6708                  * Make sure the user has specified some command.
6709                  */
6710                 if (argc < 2) {
6711                         (void) fprintf(stderr, gettext("missing command\n"));
6712                         usage(B_FALSE);
6713                 }
6714
6715                 cmdname = argv[1];
6716
6717                 /*
6718                  * The 'umount' command is an alias for 'unmount'
6719                  */
6720                 if (strcmp(cmdname, "umount") == 0)
6721                         cmdname = "unmount";
6722
6723                 /*
6724                  * The 'recv' command is an alias for 'receive'
6725                  */
6726                 if (strcmp(cmdname, "recv") == 0)
6727                         cmdname = "receive";
6728
6729                 /*
6730                  * The 'snap' command is an alias for 'snapshot'
6731                  */
6732                 if (strcmp(cmdname, "snap") == 0)
6733                         cmdname = "snapshot";
6734
6735                 /*
6736                  * Special case '-?'
6737                  */
6738                 if (strcmp(cmdname, "-?") == 0)
6739                         usage(B_TRUE);
6740
6741                 /*
6742                  * Run the appropriate command.
6743                  */
6744                 libzfs_mnttab_cache(g_zfs, B_TRUE);
6745                 if (find_command_idx(cmdname, &i) == 0) {
6746                         current_command = &command_table[i];
6747                         ret = command_table[i].func(argc - 1, argv + 1);
6748                 } else if (strchr(cmdname, '=') != NULL) {
6749                         verify(find_command_idx("set", &i) == 0);
6750                         current_command = &command_table[i];
6751                         ret = command_table[i].func(argc, argv);
6752                 } else {
6753                         (void) fprintf(stderr, gettext("unrecognized "
6754                             "command '%s'\n"), cmdname);
6755                         usage(B_FALSE);
6756                 }
6757                 libzfs_mnttab_cache(g_zfs, B_FALSE);
6758         }
6759
6760         (void) fclose(mnttab_file);
6761
6762         if (ret == 0 && log_history)
6763                 (void) zpool_log_history(g_zfs, history_str);
6764
6765         libzfs_fini(g_zfs);
6766
6767         /*
6768          * The 'ZFS_ABORT' environment variable causes us to dump core on exit
6769          * for the purposes of running ::findleaks.
6770          */
6771         if (getenv("ZFS_ABORT") != NULL) {
6772                 (void) printf("dumping core by request\n");
6773                 abort();
6774         }
6775
6776         return (ret);
6777 }