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