cddl/contrib/opensolaris/cmd/zfs/zfs_main.c

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21
  22 /*
  23  * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
  24  * Copyright 2012 Nexenta Systems, Inc. All rights reserved.
  25  * Copyright (c) 2012 by Delphix. All rights reserved.
  26  * Copyright 2012 Milan Jurik. All rights reserved.
  27  * Copyright (c) 2012, Joyent, Inc. All rights reserved.
  28  * Copyright (c) 2011-2012 Pawel Jakub Dawidek <pawel@dawidek.net>.
  29  * All rights reserved.
  30  * Copyright (c) 2012 Martin Matuska <mm@FreeBSD.org>. All rights reserved.
  31  * Copyright (c) 2013 Steven Hartland.  All rights reserved.
  32  */
  33
  34 #include <assert.h>
  35 #include <ctype.h>
  36 #include <errno.h>
  37 #include <libgen.h>
  38 #include <libintl.h>
  39 #include <libuutil.h>
  40 #include <libnvpair.h>
  41 #include <locale.h>
  42 #include <stddef.h>
  43 #include <stdio.h>
  44 #include <stdlib.h>
  45 #include <strings.h>
  46 #include <unistd.h>
  47 #include <fcntl.h>
  48 #include <zone.h>
  49 #include <grp.h>
  50 #include <pwd.h>
  51 #include <signal.h>
  52 #include <sys/list.h>
  53 #include <sys/mntent.h>
  54 #include <sys/mnttab.h>
  55 #include <sys/mount.h>
  56 #include <sys/stat.h>
  57 #include <sys/fs/zfs.h>
  58 #include <sys/types.h>
  59 #include <time.h>
  60
  61 #include <libzfs.h>
  62 #include <libzfs_core.h>
  63 #include <zfs_prop.h>
  64 #include <zfs_deleg.h>
  65 #include <libuutil.h>
  66 #ifdef sun
  67 #include <aclutils.h>
  68 #include <directory.h>
  69 #endif
  70
  71 #include "zfs_iter.h"
  72 #include "zfs_util.h"
  73 #include "zfs_comutil.h"
  74
  75 libzfs_handle_t *g_zfs;
  76
  77 static FILE *mnttab_file;
  78 static char history_str[HIS_MAX_RECORD_LEN];
  79 static boolean_t log_history = B_TRUE;
  80
  81 static int zfs_do_clone(int argc, char **argv);
  82 static int zfs_do_create(int argc, char **argv);
  83 static int zfs_do_destroy(int argc, char **argv);
  84 static int zfs_do_get(int argc, char **argv);
  85 static int zfs_do_inherit(int argc, char **argv);
  86 static int zfs_do_list(int argc, char **argv);
  87 static int zfs_do_mount(int argc, char **argv);
  88 static int zfs_do_rename(int argc, char **argv);
  89 static int zfs_do_rollback(int argc, char **argv);
  90 static int zfs_do_set(int argc, char **argv);
  91 static int zfs_do_upgrade(int argc, char **argv);
  92 static int zfs_do_snapshot(int argc, char **argv);
  93 static int zfs_do_unmount(int argc, char **argv);
  94 static int zfs_do_share(int argc, char **argv);
  95 static int zfs_do_unshare(int argc, char **argv);
  96 static int zfs_do_send(int argc, char **argv);
  97 static int zfs_do_receive(int argc, char **argv);
  98 static int zfs_do_promote(int argc, char **argv);
  99 static int zfs_do_userspace(int argc, char **argv);
 100 static int zfs_do_allow(int argc, char **argv);
 101 static int zfs_do_unallow(int argc, char **argv);
 102 static int zfs_do_hold(int argc, char **argv);
 103 static int zfs_do_holds(int argc, char **argv);
 104 static int zfs_do_release(int argc, char **argv);
 105 static int zfs_do_diff(int argc, char **argv);
 106 static int zfs_do_jail(int argc, char **argv);
 107 static int zfs_do_unjail(int argc, char **argv);
 108
 109 /*
 110  * Enable a reasonable set of defaults for libumem debugging on DEBUG builds.
 111  */
 112
 113 #ifdef DEBUG
 114 const char *
 115 _umem_debug_init(void)
 116 {
 117         return ("default,verbose"); /* $UMEM_DEBUG setting */
 118 }
 119
 120 const char *
 121 _umem_logging_init(void)
 122 {
 123         return ("fail,contents"); /* $UMEM_LOGGING setting */
 124 }
 125 #endif
 126
 127 typedef enum {
 128         HELP_CLONE,
 129         HELP_CREATE,
 130         HELP_DESTROY,
 131         HELP_GET,
 132         HELP_INHERIT,
 133         HELP_UPGRADE,
 134         HELP_JAIL,
 135         HELP_UNJAIL,
 136         HELP_LIST,
 137         HELP_MOUNT,
 138         HELP_PROMOTE,
 139         HELP_RECEIVE,
 140         HELP_RENAME,
 141         HELP_ROLLBACK,
 142         HELP_SEND,
 143         HELP_SET,
 144         HELP_SHARE,
 145         HELP_SNAPSHOT,
 146         HELP_UNMOUNT,
 147         HELP_UNSHARE,
 148         HELP_ALLOW,
 149         HELP_UNALLOW,
 150         HELP_USERSPACE,
 151         HELP_GROUPSPACE,
 152         HELP_HOLD,
 153         HELP_HOLDS,
 154         HELP_RELEASE,
 155         HELP_DIFF,
 156 } zfs_help_t;
 157
 158 typedef struct zfs_command {
 159         const char      *name;
 160         int             (*func)(int argc, char **argv);
 161         zfs_help_t      usage;
 162 } zfs_command_t;
 163
 164 /*
 165  * Master command table.  Each ZFS command has a name, associated function, and
 166  * usage message.  The usage messages need to be internationalized, so we have
 167  * to have a function to return the usage message based on a command index.
 168  *
 169  * These commands are organized according to how they are displayed in the usage
 170  * message.  An empty command (one with a NULL name) indicates an empty line in
 171  * the generic usage message.
 172  */
 173 static zfs_command_t command_table[] = {
 174         { "create",     zfs_do_create,          HELP_CREATE             },
 175         { "destroy",    zfs_do_destroy,         HELP_DESTROY            },
 176         { NULL },
 177         { "snapshot",   zfs_do_snapshot,        HELP_SNAPSHOT           },
 178         { "rollback",   zfs_do_rollback,        HELP_ROLLBACK           },
 179         { "clone",      zfs_do_clone,           HELP_CLONE              },
 180         { "promote",    zfs_do_promote,         HELP_PROMOTE            },
 181         { "rename",     zfs_do_rename,          HELP_RENAME             },
 182         { NULL },
 183         { "list",       zfs_do_list,            HELP_LIST               },
 184         { NULL },
 185         { "set",        zfs_do_set,             HELP_SET                },
 186         { "get",        zfs_do_get,             HELP_GET                },
 187         { "inherit",    zfs_do_inherit,         HELP_INHERIT            },
 188         { "upgrade",    zfs_do_upgrade,         HELP_UPGRADE            },
 189         { "userspace",  zfs_do_userspace,       HELP_USERSPACE          },
 190         { "groupspace", zfs_do_userspace,       HELP_GROUPSPACE         },
 191         { NULL },
 192         { "mount",      zfs_do_mount,           HELP_MOUNT              },
 193         { "unmount",    zfs_do_unmount,         HELP_UNMOUNT            },
 194         { "share",      zfs_do_share,           HELP_SHARE              },
 195         { "unshare",    zfs_do_unshare,         HELP_UNSHARE            },
 196         { NULL },
 197         { "send",       zfs_do_send,            HELP_SEND               },
 198         { "receive",    zfs_do_receive,         HELP_RECEIVE            },
 199         { NULL },
 200         { "allow",      zfs_do_allow,           HELP_ALLOW              },
 201         { NULL },
 202         { "unallow",    zfs_do_unallow,         HELP_UNALLOW            },
 203         { NULL },
 204         { "hold",       zfs_do_hold,            HELP_HOLD               },
 205         { "holds",      zfs_do_holds,           HELP_HOLDS              },
 206         { "release",    zfs_do_release,         HELP_RELEASE            },
 207         { "diff",       zfs_do_diff,            HELP_DIFF               },
 208         { NULL },
 209         { "jail",       zfs_do_jail,            HELP_JAIL               },
 210         { "unjail",     zfs_do_unjail,          HELP_UNJAIL             },
 211 };
 212
 213 #define NCOMMAND        (sizeof (command_table) / sizeof (command_table[0]))
 214
 215 zfs_command_t *current_command;
 216
 217 static const char *
 218 get_usage(zfs_help_t idx)
 219 {
 220         switch (idx) {
 221         case HELP_CLONE:
 222                 return (gettext("\tclone [-p] [-o property=value] ... "
 223                     "<snapshot> <filesystem|volume>\n"));
 224         case HELP_CREATE:
 225                 return (gettext("\tcreate [-p] [-o property=value] ... "
 226                     "<filesystem>\n"
 227                     "\tcreate [-ps] [-b blocksize] [-o property=value] ... "
 228                     "-V <size> <volume>\n"));
 229         case HELP_DESTROY:
 230                 return (gettext("\tdestroy [-fnpRrv] <filesystem|volume>\n"
 231                     "\tdestroy [-dnpRrv] "
 232                     "<snapshot>[%<snapname>][,...]\n"));
 233         case HELP_GET:
 234                 return (gettext("\tget [-rHp] [-d max] "
 235                     "[-o \"all\" | field[,...]] [-t type[,...]] "
 236                     "[-s source[,...]]\n"
 237                     "\t    <\"all\" | property[,...]> "
 238                     "[filesystem|volume|snapshot] ...\n"));
 239         case HELP_INHERIT:
 240                 return (gettext("\tinherit [-rS] <property> "
 241                     "<filesystem|volume|snapshot> ...\n"));
 242         case HELP_UPGRADE:
 243                 return (gettext("\tupgrade [-v]\n"
 244                     "\tupgrade [-r] [-V version] <-a | filesystem ...>\n"));
 245         case HELP_JAIL:
 246                 return (gettext("\tjail <jailid|jailname> <filesystem>\n"));
 247         case HELP_UNJAIL:
 248                 return (gettext("\tunjail <jailid|jailname> <filesystem>\n"));
 249         case HELP_LIST:
 250                 return (gettext("\tlist [-rH][-d max] "
 251                     "[-o property[,...]] [-t type[,...]] [-s property] ...\n"
 252                     "\t    [-S property] ... "
 253                     "[filesystem|volume|snapshot] ...\n"));
 254         case HELP_MOUNT:
 255                 return (gettext("\tmount\n"
 256                     "\tmount [-vO] [-o opts] <-a | filesystem>\n"));
 257         case HELP_PROMOTE:
 258                 return (gettext("\tpromote <clone-filesystem>\n"));
 259         case HELP_RECEIVE:
 260                 return (gettext("\treceive [-vnFu] <filesystem|volume|"
 261                 "snapshot>\n"
 262                 "\treceive [-vnFu] [-d | -e] <filesystem>\n"));
 263         case HELP_RENAME:
 264                 return (gettext("\trename [-f] <filesystem|volume|snapshot> "
 265                     "<filesystem|volume|snapshot>\n"
 266                     "\trename [-f] -p <filesystem|volume> "
 267                     "<filesystem|volume>\n"
 268                     "\trename -r <snapshot> <snapshot>\n"
 269                     "\trename -u [-p] <filesystem> <filesystem>"));
 270         case HELP_ROLLBACK:
 271                 return (gettext("\trollback [-rRf] <snapshot>\n"));
 272         case HELP_SEND:
 273                 return (gettext("\tsend [-DnPpRv] "
 274                     "[-i snapshot | -I snapshot] <snapshot>\n"));
 275         case HELP_SET:
 276                 return (gettext("\tset <property=value> "
 277                     "<filesystem|volume|snapshot> ...\n"));
 278         case HELP_SHARE:
 279                 return (gettext("\tshare <-a | filesystem>\n"));
 280         case HELP_SNAPSHOT:
 281                 return (gettext("\tsnapshot [-r] [-o property=value] ... "
 282                     "<filesystem@snapname|volume@snapname> ...\n"));
 283         case HELP_UNMOUNT:
 284                 return (gettext("\tunmount [-f] "
 285                     "<-a | filesystem|mountpoint>\n"));
 286         case HELP_UNSHARE:
 287                 return (gettext("\tunshare "
 288                     "<-a | filesystem|mountpoint>\n"));
 289         case HELP_ALLOW:
 290                 return (gettext("\tallow <filesystem|volume>\n"
 291                     "\tallow [-ldug] "
 292                     "<\"everyone\"|user|group>[,...] <perm|@setname>[,...]\n"
 293                     "\t    <filesystem|volume>\n"
 294                     "\tallow [-ld] -e <perm|@setname>[,...] "
 295                     "<filesystem|volume>\n"
 296                     "\tallow -c <perm|@setname>[,...] <filesystem|volume>\n"
 297                     "\tallow -s @setname <perm|@setname>[,...] "
 298                     "<filesystem|volume>\n"));
 299         case HELP_UNALLOW:
 300                 return (gettext("\tunallow [-rldug] "
 301                     "<\"everyone\"|user|group>[,...]\n"
 302                     "\t    [<perm|@setname>[,...]] <filesystem|volume>\n"
 303                     "\tunallow [-rld] -e [<perm|@setname>[,...]] "
 304                     "<filesystem|volume>\n"
 305                     "\tunallow [-r] -c [<perm|@setname>[,...]] "
 306                     "<filesystem|volume>\n"
 307                     "\tunallow [-r] -s @setname [<perm|@setname>[,...]] "
 308                     "<filesystem|volume>\n"));
 309         case HELP_USERSPACE:
 310                 return (gettext("\tuserspace [-Hinp] [-o field[,...]] "
 311                     "[-s field] ...\n\t[-S field] ... "
 312                     "[-t type[,...]] <filesystem|snapshot>\n"));
 313         case HELP_GROUPSPACE:
 314                 return (gettext("\tgroupspace [-Hinp] [-o field[,...]] "
 315                     "[-s field] ...\n\t[-S field] ... "
 316                     "[-t type[,...]] <filesystem|snapshot>\n"));
 317         case HELP_HOLD:
 318                 return (gettext("\thold [-r] <tag> <snapshot> ...\n"));
 319         case HELP_HOLDS:
 320                 return (gettext("\tholds [-r] <snapshot> ...\n"));
 321         case HELP_RELEASE:
 322                 return (gettext("\trelease [-r] <tag> <snapshot> ...\n"));
 323         case HELP_DIFF:
 324                 return (gettext("\tdiff [-FHt] <snapshot> "
 325                     "[snapshot|filesystem]\n"));
 326         }
 327
 328         abort();
 329         /* NOTREACHED */
 330 }
 331
 332 void
 333 nomem(void)
 334 {
 335         (void) fprintf(stderr, gettext("internal error: out of memory\n"));
 336         exit(1);
 337 }
 338
 339 /*
 340  * Utility function to guarantee malloc() success.
 341  */
 342
 343 void *
 344 safe_malloc(size_t size)
 345 {
 346         void *data;
 347
 348         if ((data = calloc(1, size)) == NULL)
 349                 nomem();
 350
 351         return (data);
 352 }
 353
 354 static char *
 355 safe_strdup(char *str)
 356 {
 357         char *dupstr = strdup(str);
 358
 359         if (dupstr == NULL)
 360                 nomem();
 361
 362         return (dupstr);
 363 }
 364
 365 /*
 366  * Callback routine that will print out information for each of
 367  * the properties.
 368  */
 369 static int
 370 usage_prop_cb(int prop, void *cb)
 371 {
 372         FILE *fp = cb;
 373
 374         (void) fprintf(fp, "\t%-15s ", zfs_prop_to_name(prop));
 375
 376         if (zfs_prop_readonly(prop))
 377                 (void) fprintf(fp, " NO    ");
 378         else
 379                 (void) fprintf(fp, "YES    ");
 380
 381         if (zfs_prop_inheritable(prop))
 382                 (void) fprintf(fp, "  YES   ");
 383         else
 384                 (void) fprintf(fp, "   NO   ");
 385
 386         if (zfs_prop_values(prop) == NULL)
 387                 (void) fprintf(fp, "-\n");
 388         else
 389                 (void) fprintf(fp, "%s\n", zfs_prop_values(prop));
 390
 391         return (ZPROP_CONT);
 392 }
 393
 394 /*
 395  * Display usage message.  If we're inside a command, display only the usage for
 396  * that command.  Otherwise, iterate over the entire command table and display
 397  * a complete usage message.
 398  */
 399 static void
 400 usage(boolean_t requested)
 401 {
 402         int i;
 403         boolean_t show_properties = B_FALSE;
 404         FILE *fp = requested ? stdout : stderr;
 405
 406         if (current_command == NULL) {
 407
 408                 (void) fprintf(fp, gettext("usage: zfs command args ...\n"));
 409                 (void) fprintf(fp,
 410                     gettext("where 'command' is one of the following:\n\n"));
 411
 412                 for (i = 0; i < NCOMMAND; i++) {
 413                         if (command_table[i].name == NULL)
 414                                 (void) fprintf(fp, "\n");
 415                         else
 416                                 (void) fprintf(fp, "%s",
 417                                     get_usage(command_table[i].usage));
 418                 }
 419
 420                 (void) fprintf(fp, gettext("\nEach dataset is of the form: "
 421                     "pool/[dataset/]*dataset[@name]\n"));
 422         } else {
 423                 (void) fprintf(fp, gettext("usage:\n"));
 424                 (void) fprintf(fp, "%s", get_usage(current_command->usage));
 425         }
 426
 427         if (current_command != NULL &&
 428             (strcmp(current_command->name, "set") == 0 ||
 429             strcmp(current_command->name, "get") == 0 ||
 430             strcmp(current_command->name, "inherit") == 0 ||
 431             strcmp(current_command->name, "list") == 0))
 432                 show_properties = B_TRUE;
 433
 434         if (show_properties) {
 435                 (void) fprintf(fp,
 436                     gettext("\nThe following properties are supported:\n"));
 437
 438                 (void) fprintf(fp, "\n\t%-14s %s  %s   %s\n\n",
 439                     "PROPERTY", "EDIT", "INHERIT", "VALUES");
 440
 441                 /* Iterate over all properties */
 442                 (void) zprop_iter(usage_prop_cb, fp, B_FALSE, B_TRUE,
 443                     ZFS_TYPE_DATASET);
 444
 445                 (void) fprintf(fp, "\t%-15s ", "userused@...");
 446                 (void) fprintf(fp, " NO       NO   <size>\n");
 447                 (void) fprintf(fp, "\t%-15s ", "groupused@...");
 448                 (void) fprintf(fp, " NO       NO   <size>\n");
 449                 (void) fprintf(fp, "\t%-15s ", "userquota@...");
 450                 (void) fprintf(fp, "YES       NO   <size> | none\n");
 451                 (void) fprintf(fp, "\t%-15s ", "groupquota@...");
 452                 (void) fprintf(fp, "YES       NO   <size> | none\n");
 453                 (void) fprintf(fp, "\t%-15s ", "written@<snap>");
 454                 (void) fprintf(fp, " NO       NO   <size>\n");
 455
 456                 (void) fprintf(fp, gettext("\nSizes are specified in bytes "
 457                     "with standard units such as K, M, G, etc.\n"));
 458                 (void) fprintf(fp, gettext("\nUser-defined properties can "
 459                     "be specified by using a name containing a colon (:).\n"));
 460                 (void) fprintf(fp, gettext("\nThe {user|group}{used|quota}@ "
 461                     "properties must be appended with\n"
 462                     "a user or group specifier of one of these forms:\n"
 463                     "    POSIX name      (eg: \"matt\")\n"
 464                     "    POSIX id        (eg: \"126829\")\n"
 465                     "    SMB name@domain (eg: \"matt@sun\")\n"
 466                     "    SMB SID         (eg: \"S-1-234-567-89\")\n"));
 467         } else {
 468                 (void) fprintf(fp,
 469                     gettext("\nFor the property list, run: %s\n"),
 470                     "zfs set|get");
 471                 (void) fprintf(fp,
 472                     gettext("\nFor the delegated permission list, run: %s\n"),
 473                     "zfs allow|unallow");
 474         }
 475
 476         /*
 477          * See comments at end of main().
 478          */
 479         if (getenv("ZFS_ABORT") != NULL) {
 480                 (void) printf("dumping core by request\n");
 481                 abort();
 482         }
 483
 484         exit(requested ? 0 : 2);
 485 }
 486
 487 static int
 488 parseprop(nvlist_t *props)
 489 {
 490         char *propname = optarg;
 491         char *propval, *strval;
 492
 493         if ((propval = strchr(propname, '=')) == NULL) {
 494                 (void) fprintf(stderr, gettext("missing "
 495                     "'=' for -o option\n"));
 496                 return (-1);
 497         }
 498         *propval = '\0';
 499         propval++;
 500         if (nvlist_lookup_string(props, propname, &strval) == 0) {
 501                 (void) fprintf(stderr, gettext("property '%s' "
 502                     "specified multiple times\n"), propname);
 503                 return (-1);
 504         }
 505         if (nvlist_add_string(props, propname, propval) != 0)
 506                 nomem();
 507         return (0);
 508 }
 509
 510 static int
 511 parse_depth(char *opt, int *flags)
 512 {
 513         char *tmp;
 514         int depth;
 515
 516         depth = (int)strtol(opt, &tmp, 0);
 517         if (*tmp) {
 518                 (void) fprintf(stderr,
 519                     gettext("%s is not an integer\n"), optarg);
 520                 usage(B_FALSE);
 521         }
 522         if (depth < 0) {
 523                 (void) fprintf(stderr,
 524                     gettext("Depth can not be negative.\n"));
 525                 usage(B_FALSE);
 526         }
 527         *flags |= (ZFS_ITER_DEPTH_LIMIT|ZFS_ITER_RECURSE);
 528         return (depth);
 529 }
 530
 531 #define PROGRESS_DELAY 2                /* seconds */
 532
 533 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";
 534 static time_t pt_begin;
 535 static char *pt_header = NULL;
 536 static boolean_t pt_shown;
 537
 538 static void
 539 start_progress_timer(void)
 540 {
 541         pt_begin = time(NULL) + PROGRESS_DELAY;
 542         pt_shown = B_FALSE;
 543 }
 544
 545 static void
 546 set_progress_header(char *header)
 547 {
 548         assert(pt_header == NULL);
 549         pt_header = safe_strdup(header);
 550         if (pt_shown) {
 551                 (void) printf("%s: ", header);
 552                 (void) fflush(stdout);
 553         }
 554 }
 555
 556 static void
 557 update_progress(char *update)
 558 {
 559         if (!pt_shown && time(NULL) > pt_begin) {
 560                 int len = strlen(update);
 561
 562                 (void) printf("%s: %s%*.*s", pt_header, update, len, len,
 563                     pt_reverse);
 564                 (void) fflush(stdout);
 565                 pt_shown = B_TRUE;
 566         } else if (pt_shown) {
 567                 int len = strlen(update);
 568
 569                 (void) printf("%s%*.*s", update, len, len, pt_reverse);
 570                 (void) fflush(stdout);
 571         }
 572 }
 573
 574 static void
 575 finish_progress(char *done)
 576 {
 577         if (pt_shown) {
 578                 (void) printf("%s\n", done);
 579                 (void) fflush(stdout);
 580         }
 581         free(pt_header);
 582         pt_header = NULL;
 583 }
 584 /*
 585  * zfs clone [-p] [-o prop=value] ... <snap> <fs | vol>
 586  *
 587  * Given an existing dataset, create a writable copy whose initial contents
 588  * are the same as the source.  The newly created dataset maintains a
 589  * dependency on the original; the original cannot be destroyed so long as
 590  * the clone exists.
 591  *
 592  * The '-p' flag creates all the non-existing ancestors of the target first.
 593  */
 594 static int
 595 zfs_do_clone(int argc, char **argv)
 596 {
 597         zfs_handle_t *zhp = NULL;
 598         boolean_t parents = B_FALSE;
 599         nvlist_t *props;
 600         int ret = 0;
 601         int c;
 602
 603         if (nvlist_alloc(&props, NV_UNIQUE_NAME, 0) != 0)
 604                 nomem();
 605
 606         /* check options */
 607         while ((c = getopt(argc, argv, "o:p")) != -1) {
 608                 switch (c) {
 609                 case 'o':
 610                         if (parseprop(props))
 611                                 return (1);
 612                         break;
 613                 case 'p':
 614                         parents = B_TRUE;
 615                         break;
 616                 case '?':
 617                         (void) fprintf(stderr, gettext("invalid option '%c'\n"),
 618                             optopt);
 619                         goto usage;
 620                 }
 621         }
 622
 623         argc -= optind;
 624         argv += optind;
 625
 626         /* check number of arguments */
 627         if (argc < 1) {
 628                 (void) fprintf(stderr, gettext("missing source dataset "
 629                     "argument\n"));
 630                 goto usage;
 631         }
 632         if (argc < 2) {
 633                 (void) fprintf(stderr, gettext("missing target dataset "
 634                     "argument\n"));
 635                 goto usage;
 636         }
 637         if (argc > 2) {
 638                 (void) fprintf(stderr, gettext("too many arguments\n"));
 639                 goto usage;
 640         }
 641
 642         /* open the source dataset */
 643         if ((zhp = zfs_open(g_zfs, argv[0], ZFS_TYPE_SNAPSHOT)) == NULL)
 644                 return (1);
 645
 646         if (parents && zfs_name_valid(argv[1], ZFS_TYPE_FILESYSTEM |
 647             ZFS_TYPE_VOLUME)) {
 648                 /*
 649                  * Now create the ancestors of the target dataset.  If the
 650                  * target already exists and '-p' option was used we should not
 651                  * complain.
 652                  */
 653                 if (zfs_dataset_exists(g_zfs, argv[1], ZFS_TYPE_FILESYSTEM |
 654                     ZFS_TYPE_VOLUME))
 655                         return (0);
 656                 if (zfs_create_ancestors(g_zfs, argv[1]) != 0)
 657                         return (1);
 658         }
 659
 660         /* pass to libzfs */
 661         ret = zfs_clone(zhp, argv[1], props);
 662
 663         /* create the mountpoint if necessary */
 664         if (ret == 0) {
 665                 zfs_handle_t *clone;
 666
 667                 clone = zfs_open(g_zfs, argv[1], ZFS_TYPE_DATASET);
 668                 if (clone != NULL) {
 669                         if (zfs_get_type(clone) != ZFS_TYPE_VOLUME)
 670                                 if ((ret = zfs_mount(clone, NULL, 0)) == 0)
 671                                         ret = zfs_share(clone);
 672                         zfs_close(clone);
 673                 }
 674         }
 675
 676         zfs_close(zhp);
 677         nvlist_free(props);
 678
 679         return (!!ret);
 680
 681 usage:
 682         if (zhp)
 683                 zfs_close(zhp);
 684         nvlist_free(props);
 685         usage(B_FALSE);
 686         return (-1);
 687 }
 688
 689 /*
 690  * zfs create [-p] [-o prop=value] ... fs
 691  * zfs create [-ps] [-b blocksize] [-o prop=value] ... -V vol size
 692  *
 693  * Create a new dataset.  This command can be used to create filesystems
 694  * and volumes.  Snapshot creation is handled by 'zfs snapshot'.
 695  * For volumes, the user must specify a size to be used.
 696  *
 697  * The '-s' flag applies only to volumes, and indicates that we should not try
 698  * to set the reservation for this volume.  By default we set a reservation
 699  * equal to the size for any volume.  For pools with SPA_VERSION >=
 700  * SPA_VERSION_REFRESERVATION, we set a refreservation instead.
 701  *
 702  * The '-p' flag creates all the non-existing ancestors of the target first.
 703  */
 704 static int
 705 zfs_do_create(int argc, char **argv)
 706 {
 707         zfs_type_t type = ZFS_TYPE_FILESYSTEM;
 708         zfs_handle_t *zhp = NULL;
 709         uint64_t volsize;
 710         int c;
 711         boolean_t noreserve = B_FALSE;
 712         boolean_t bflag = B_FALSE;
 713         boolean_t parents = B_FALSE;
 714         int ret = 1;
 715         nvlist_t *props;
 716         uint64_t intval;
 717         int canmount = ZFS_CANMOUNT_OFF;
 718
 719         if (nvlist_alloc(&props, NV_UNIQUE_NAME, 0) != 0)
 720                 nomem();
 721
 722         /* check options */
 723         while ((c = getopt(argc, argv, ":V:b:so:p")) != -1) {
 724                 switch (c) {
 725                 case 'V':
 726                         type = ZFS_TYPE_VOLUME;
 727                         if (zfs_nicestrtonum(g_zfs, optarg, &intval) != 0) {
 728                                 (void) fprintf(stderr, gettext("bad volume "
 729                                     "size '%s': %s\n"), optarg,
 730                                     libzfs_error_description(g_zfs));
 731                                 goto error;
 732                         }
 733
 734                         if (nvlist_add_uint64(props,
 735                             zfs_prop_to_name(ZFS_PROP_VOLSIZE), intval) != 0)
 736                                 nomem();
 737                         volsize = intval;
 738                         break;
 739                 case 'p':
 740                         parents = B_TRUE;
 741                         break;
 742                 case 'b':
 743                         bflag = B_TRUE;
 744                         if (zfs_nicestrtonum(g_zfs, optarg, &intval) != 0) {
 745                                 (void) fprintf(stderr, gettext("bad volume "
 746                                     "block size '%s': %s\n"), optarg,
 747                                     libzfs_error_description(g_zfs));
 748                                 goto error;
 749                         }
 750
 751                         if (nvlist_add_uint64(props,
 752                             zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE),
 753                             intval) != 0)
 754                                 nomem();
 755                         break;
 756                 case 'o':
 757                         if (parseprop(props))
 758                                 goto error;
 759                         break;
 760                 case 's':
 761                         noreserve = B_TRUE;
 762                         break;
 763                 case ':':
 764                         (void) fprintf(stderr, gettext("missing size "
 765                             "argument\n"));
 766                         goto badusage;
 767                 case '?':
 768                         (void) fprintf(stderr, gettext("invalid option '%c'\n"),
 769                             optopt);
 770                         goto badusage;
 771                 }
 772         }
 773
 774         if ((bflag || noreserve) && type != ZFS_TYPE_VOLUME) {
 775                 (void) fprintf(stderr, gettext("'-s' and '-b' can only be "
 776                     "used when creating a volume\n"));
 777                 goto badusage;
 778         }
 779
 780         argc -= optind;
 781         argv += optind;
 782
 783         /* check number of arguments */
 784         if (argc == 0) {
 785                 (void) fprintf(stderr, gettext("missing %s argument\n"),
 786                     zfs_type_to_name(type));
 787                 goto badusage;
 788         }
 789         if (argc > 1) {
 790                 (void) fprintf(stderr, gettext("too many arguments\n"));
 791                 goto badusage;
 792         }
 793
 794         if (type == ZFS_TYPE_VOLUME && !noreserve) {
 795                 zpool_handle_t *zpool_handle;
 796                 uint64_t spa_version;
 797                 char *p;
 798                 zfs_prop_t resv_prop;
 799                 char *strval;
 800
 801                 if (p = strchr(argv[0], '/'))
 802                         *p = '\0';
 803                 zpool_handle = zpool_open(g_zfs, argv[0]);
 804                 if (p != NULL)
 805                         *p = '/';
 806                 if (zpool_handle == NULL)
 807                         goto error;
 808                 spa_version = zpool_get_prop_int(zpool_handle,
 809                     ZPOOL_PROP_VERSION, NULL);
 810                 zpool_close(zpool_handle);
 811                 if (spa_version >= SPA_VERSION_REFRESERVATION)
 812                         resv_prop = ZFS_PROP_REFRESERVATION;
 813                 else
 814                         resv_prop = ZFS_PROP_RESERVATION;
 815                 volsize = zvol_volsize_to_reservation(volsize, props);
 816
 817                 if (nvlist_lookup_string(props, zfs_prop_to_name(resv_prop),
 818                     &strval) != 0) {
 819                         if (nvlist_add_uint64(props,
 820                             zfs_prop_to_name(resv_prop), volsize) != 0) {
 821                                 nvlist_free(props);
 822                                 nomem();
 823                         }
 824                 }
 825         }
 826
 827         if (parents && zfs_name_valid(argv[0], type)) {
 828                 /*
 829                  * Now create the ancestors of target dataset.  If the target
 830                  * already exists and '-p' option was used we should not
 831                  * complain.
 832                  */
 833                 if (zfs_dataset_exists(g_zfs, argv[0], type)) {
 834                         ret = 0;
 835                         goto error;
 836                 }
 837                 if (zfs_create_ancestors(g_zfs, argv[0]) != 0)
 838                         goto error;
 839         }
 840
 841         /* pass to libzfs */
 842         if (zfs_create(g_zfs, argv[0], type, props) != 0)
 843                 goto error;
 844
 845         if ((zhp = zfs_open(g_zfs, argv[0], ZFS_TYPE_DATASET)) == NULL)
 846                 goto error;
 847
 848         ret = 0;
 849         /*
 850          * if the user doesn't want the dataset automatically mounted,
 851          * then skip the mount/share step
 852          */
 853         if (zfs_prop_valid_for_type(ZFS_PROP_CANMOUNT, type))
 854                 canmount = zfs_prop_get_int(zhp, ZFS_PROP_CANMOUNT);
 855
 856         /*
 857          * Mount and/or share the new filesystem as appropriate.  We provide a
 858          * verbose error message to let the user know that their filesystem was
 859          * in fact created, even if we failed to mount or share it.
 860          */
 861         if (canmount == ZFS_CANMOUNT_ON) {
 862                 if (zfs_mount(zhp, NULL, 0) != 0) {
 863                         (void) fprintf(stderr, gettext("filesystem "
 864                             "successfully created, but not mounted\n"));
 865                         ret = 1;
 866                 } else if (zfs_share(zhp) != 0) {
 867                         (void) fprintf(stderr, gettext("filesystem "
 868                             "successfully created, but not shared\n"));
 869                         ret = 1;
 870                 }
 871         }
 872
 873 error:
 874         if (zhp)
 875                 zfs_close(zhp);
 876         nvlist_free(props);
 877         return (ret);
 878 badusage:
 879         nvlist_free(props);
 880         usage(B_FALSE);
 881         return (2);
 882 }
 883
 884 /*
 885  * zfs destroy [-rRf] <fs, vol>
 886  * zfs destroy [-rRd] <snap>
 887  *
 888  *      -r      Recursively destroy all children
 889  *      -R      Recursively destroy all dependents, including clones
 890  *      -f      Force unmounting of any dependents
 891  *      -d      If we can't destroy now, mark for deferred destruction
 892  *
 893  * Destroys the given dataset.  By default, it will unmount any filesystems,
 894  * and refuse to destroy a dataset that has any dependents.  A dependent can
 895  * either be a child, or a clone of a child.
 896  */
 897 typedef struct destroy_cbdata {
 898         boolean_t       cb_first;
 899         boolean_t       cb_force;
 900         boolean_t       cb_recurse;
 901         boolean_t       cb_error;
 902         boolean_t       cb_doclones;
 903         zfs_handle_t    *cb_target;
 904         boolean_t       cb_defer_destroy;
 905         boolean_t       cb_verbose;
 906         boolean_t       cb_parsable;
 907         boolean_t       cb_dryrun;
 908         nvlist_t        *cb_nvl;
 909         nvlist_t        *cb_batchedsnaps;
 910
 911         /* first snap in contiguous run */
 912         char            *cb_firstsnap;
 913         /* previous snap in contiguous run */
 914         char            *cb_prevsnap;
 915         int64_t         cb_snapused;
 916         char            *cb_snapspec;
 917 } destroy_cbdata_t;
 918
 919 /*
 920  * Check for any dependents based on the '-r' or '-R' flags.
 921  */
 922 static int
 923 destroy_check_dependent(zfs_handle_t *zhp, void *data)
 924 {
 925         destroy_cbdata_t *cbp = data;
 926         const char *tname = zfs_get_name(cbp->cb_target);
 927         const char *name = zfs_get_name(zhp);
 928
 929         if (strncmp(tname, name, strlen(tname)) == 0 &&
 930             (name[strlen(tname)] == '/' || name[strlen(tname)] == '@')) {
 931                 /*
 932                  * This is a direct descendant, not a clone somewhere else in
 933                  * the hierarchy.
 934                  */
 935                 if (cbp->cb_recurse)
 936                         goto out;
 937
 938                 if (cbp->cb_first) {
 939                         (void) fprintf(stderr, gettext("cannot destroy '%s': "
 940                             "%s has children\n"),
 941                             zfs_get_name(cbp->cb_target),
 942                             zfs_type_to_name(zfs_get_type(cbp->cb_target)));
 943                         (void) fprintf(stderr, gettext("use '-r' to destroy "
 944                             "the following datasets:\n"));
 945                         cbp->cb_first = B_FALSE;
 946                         cbp->cb_error = B_TRUE;
 947                 }
 948
 949                 (void) fprintf(stderr, "%s\n", zfs_get_name(zhp));
 950         } else {
 951                 /*
 952                  * This is a clone.  We only want to report this if the '-r'
 953                  * wasn't specified, or the target is a snapshot.
 954                  */
 955                 if (!cbp->cb_recurse &&
 956                     zfs_get_type(cbp->cb_target) != ZFS_TYPE_SNAPSHOT)
 957                         goto out;
 958
 959                 if (cbp->cb_first) {
 960                         (void) fprintf(stderr, gettext("cannot destroy '%s': "
 961                             "%s has dependent clones\n"),
 962                             zfs_get_name(cbp->cb_target),
 963                             zfs_type_to_name(zfs_get_type(cbp->cb_target)));
 964                         (void) fprintf(stderr, gettext("use '-R' to destroy "
 965                             "the following datasets:\n"));
 966                         cbp->cb_first = B_FALSE;
 967                         cbp->cb_error = B_TRUE;
 968                         cbp->cb_dryrun = B_TRUE;
 969                 }
 970
 971                 (void) fprintf(stderr, "%s\n", zfs_get_name(zhp));
 972         }
 973
 974 out:
 975         zfs_close(zhp);
 976         return (0);
 977 }
 978
 979 static int
 980 destroy_callback(zfs_handle_t *zhp, void *data)
 981 {
 982         destroy_cbdata_t *cb = data;
 983         const char *name = zfs_get_name(zhp);
 984
 985         if (cb->cb_verbose) {
 986                 if (cb->cb_parsable) {
 987                         (void) printf("destroy\t%s\n", name);
 988                 } else if (cb->cb_dryrun) {
 989                         (void) printf(gettext("would destroy %s\n"),
 990                             name);
 991                 } else {
 992                         (void) printf(gettext("will destroy %s\n"),
 993                             name);
 994                 }
 995         }
 996
 997         /*
 998          * Ignore pools (which we've already flagged as an error before getting
 999          * here).
1000          */
1001         if (strchr(zfs_get_name(zhp), '/') == NULL &&
1002             zfs_get_type(zhp) == ZFS_TYPE_FILESYSTEM) {
1003                 zfs_close(zhp);
1004                 return (0);
1005         }
1006         if (cb->cb_dryrun) {
1007                 zfs_close(zhp);
1008                 return (0);
1009         }
1010
1011         /*
1012          * We batch up all contiguous snapshots (even of different
1013          * filesystems) and destroy them with one ioctl.  We can't
1014          * simply do all snap deletions and then all fs deletions,
1015          * because we must delete a clone before its origin.
1016          */
1017         if (zfs_get_type(zhp) == ZFS_TYPE_SNAPSHOT) {
1018                 fnvlist_add_boolean(cb->cb_batchedsnaps, name);
1019         } else {
1020                 int error = zfs_destroy_snaps_nvl(g_zfs,
1021                     cb->cb_batchedsnaps, B_FALSE);
1022                 fnvlist_free(cb->cb_batchedsnaps);
1023                 cb->cb_batchedsnaps = fnvlist_alloc();
1024
1025                 if (error != 0 ||
1026                     zfs_unmount(zhp, NULL, cb->cb_force ? MS_FORCE : 0) != 0 ||
1027                     zfs_destroy(zhp, cb->cb_defer_destroy) != 0) {
1028                         zfs_close(zhp);
1029                         return (-1);
1030                 }
1031         }
1032
1033         zfs_close(zhp);
1034         return (0);
1035 }
1036
1037 static int
1038 destroy_print_cb(zfs_handle_t *zhp, void *arg)
1039 {
1040         destroy_cbdata_t *cb = arg;
1041         const char *name = zfs_get_name(zhp);
1042         int err = 0;
1043
1044         if (nvlist_exists(cb->cb_nvl, name)) {
1045                 if (cb->cb_firstsnap == NULL)
1046                         cb->cb_firstsnap = strdup(name);
1047                 if (cb->cb_prevsnap != NULL)
1048                         free(cb->cb_prevsnap);
1049                 /* this snap continues the current range */
1050                 cb->cb_prevsnap = strdup(name);
1051                 if (cb->cb_firstsnap == NULL || cb->cb_prevsnap == NULL)
1052                         nomem();
1053                 if (cb->cb_verbose) {
1054                         if (cb->cb_parsable) {
1055                                 (void) printf("destroy\t%s\n", name);
1056                         } else if (cb->cb_dryrun) {
1057                                 (void) printf(gettext("would destroy %s\n"),
1058                                     name);
1059                         } else {
1060                                 (void) printf(gettext("will destroy %s\n"),
1061                                     name);
1062                         }
1063                 }
1064         } else if (cb->cb_firstsnap != NULL) {
1065                 /* end of this range */
1066                 uint64_t used = 0;
1067                 err = lzc_snaprange_space(cb->cb_firstsnap,
1068                     cb->cb_prevsnap, &used);
1069                 cb->cb_snapused += used;
1070                 free(cb->cb_firstsnap);
1071                 cb->cb_firstsnap = NULL;
1072                 free(cb->cb_prevsnap);
1073                 cb->cb_prevsnap = NULL;
1074         }
1075         zfs_close(zhp);
1076         return (err);
1077 }
1078
1079 static int
1080 destroy_print_snapshots(zfs_handle_t *fs_zhp, destroy_cbdata_t *cb)
1081 {
1082         int err = 0;
1083         assert(cb->cb_firstsnap == NULL);
1084         assert(cb->cb_prevsnap == NULL);
1085         err = zfs_iter_snapshots_sorted(fs_zhp, destroy_print_cb, cb);
1086         if (cb->cb_firstsnap != NULL) {
1087                 uint64_t used = 0;
1088                 if (err == 0) {
1089                         err = lzc_snaprange_space(cb->cb_firstsnap,
1090                             cb->cb_prevsnap, &used);
1091                 }
1092                 cb->cb_snapused += used;
1093                 free(cb->cb_firstsnap);
1094                 cb->cb_firstsnap = NULL;
1095                 free(cb->cb_prevsnap);
1096                 cb->cb_prevsnap = NULL;
1097         }
1098         return (err);
1099 }
1100
1101 static int
1102 snapshot_to_nvl_cb(zfs_handle_t *zhp, void *arg)
1103 {
1104         destroy_cbdata_t *cb = arg;
1105         int err = 0;
1106
1107         /* Check for clones. */
1108         if (!cb->cb_doclones && !cb->cb_defer_destroy) {
1109                 cb->cb_target = zhp;
1110                 cb->cb_first = B_TRUE;
1111                 err = zfs_iter_dependents(zhp, B_TRUE,
1112                     destroy_check_dependent, cb);
1113         }
1114
1115         if (err == 0) {
1116                 if (nvlist_add_boolean(cb->cb_nvl, zfs_get_name(zhp)))
1117                         nomem();
1118         }
1119         zfs_close(zhp);
1120         return (err);
1121 }
1122
1123 static int
1124 gather_snapshots(zfs_handle_t *zhp, void *arg)
1125 {
1126         destroy_cbdata_t *cb = arg;
1127         int err = 0;
1128
1129         err = zfs_iter_snapspec(zhp, cb->cb_snapspec, snapshot_to_nvl_cb, cb);
1130         if (err == ENOENT)
1131                 err = 0;
1132         if (err != 0)
1133                 goto out;
1134
1135         if (cb->cb_verbose) {
1136                 err = destroy_print_snapshots(zhp, cb);
1137                 if (err != 0)
1138                         goto out;
1139         }
1140
1141         if (cb->cb_recurse)
1142                 err = zfs_iter_filesystems(zhp, gather_snapshots, cb);
1143
1144 out:
1145         zfs_close(zhp);
1146         return (err);
1147 }
1148
1149 static int
1150 destroy_clones(destroy_cbdata_t *cb)
1151 {
1152         nvpair_t *pair;
1153         for (pair = nvlist_next_nvpair(cb->cb_nvl, NULL);
1154             pair != NULL;
1155             pair = nvlist_next_nvpair(cb->cb_nvl, pair)) {
1156                 zfs_handle_t *zhp = zfs_open(g_zfs, nvpair_name(pair),
1157                     ZFS_TYPE_SNAPSHOT);
1158                 if (zhp != NULL) {
1159                         boolean_t defer = cb->cb_defer_destroy;
1160                         int err = 0;
1161
1162                         /*
1163                          * We can't defer destroy non-snapshots, so set it to
1164                          * false while destroying the clones.
1165                          */
1166                         cb->cb_defer_destroy = B_FALSE;
1167                         err = zfs_iter_dependents(zhp, B_FALSE,
1168                             destroy_callback, cb);
1169                         cb->cb_defer_destroy = defer;
1170                         zfs_close(zhp);
1171                         if (err != 0)
1172                                 return (err);
1173                 }
1174         }
1175         return (0);
1176 }
1177
1178 static int
1179 zfs_do_destroy(int argc, char **argv)
1180 {
1181         destroy_cbdata_t cb = { 0 };
1182         int rv = 0;
1183         int err = 0;
1184         int c;
1185         zfs_handle_t *zhp = NULL;
1186         char *at;
1187         zfs_type_t type = ZFS_TYPE_DATASET;
1188
1189         /* check options */
1190         while ((c = getopt(argc, argv, "vpndfrR")) != -1) {
1191                 switch (c) {
1192                 case 'v':
1193                         cb.cb_verbose = B_TRUE;
1194                         break;
1195                 case 'p':
1196                         cb.cb_verbose = B_TRUE;
1197                         cb.cb_parsable = B_TRUE;
1198                         break;
1199                 case 'n':
1200                         cb.cb_dryrun = B_TRUE;
1201                         break;
1202                 case 'd':
1203                         cb.cb_defer_destroy = B_TRUE;
1204                         type = ZFS_TYPE_SNAPSHOT;
1205                         break;
1206                 case 'f':
1207                         cb.cb_force = B_TRUE;
1208                         break;
1209                 case 'r':
1210                         cb.cb_recurse = B_TRUE;
1211                         break;
1212                 case 'R':
1213                         cb.cb_recurse = B_TRUE;
1214                         cb.cb_doclones = B_TRUE;
1215                         break;
1216                 case '?':
1217                 default:
1218                         (void) fprintf(stderr, gettext("invalid option '%c'\n"),
1219                             optopt);
1220                         usage(B_FALSE);
1221                 }
1222         }
1223
1224         argc -= optind;
1225         argv += optind;
1226
1227         /* check number of arguments */
1228         if (argc == 0) {
1229                 (void) fprintf(stderr, gettext("missing dataset argument\n"));
1230                 usage(B_FALSE);
1231         }
1232         if (argc > 1) {
1233                 (void) fprintf(stderr, gettext("too many arguments\n"));
1234                 usage(B_FALSE);
1235         }
1236
1237         at = strchr(argv[0], '@');
1238         if (at != NULL) {
1239
1240                 /* Build the list of snaps to destroy in cb_nvl. */
1241                 cb.cb_nvl = fnvlist_alloc();
1242
1243                 *at = '\0';
1244                 zhp = zfs_open(g_zfs, argv[0],
1245                     ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME);
1246                 if (zhp == NULL)
1247                         return (1);
1248
1249                 cb.cb_snapspec = at + 1;
1250                 if (gather_snapshots(zfs_handle_dup(zhp), &cb) != 0 ||
1251                     cb.cb_error) {
1252                         rv = 1;
1253                         goto out;
1254                 }
1255
1256                 if (nvlist_empty(cb.cb_nvl)) {
1257                         (void) fprintf(stderr, gettext("could not find any "
1258                             "snapshots to destroy; check snapshot names.\n"));
1259                         rv = 1;
1260                         goto out;
1261                 }
1262
1263                 if (cb.cb_verbose) {
1264                         char buf[16];
1265                         zfs_nicenum(cb.cb_snapused, buf, sizeof (buf));
1266                         if (cb.cb_parsable) {
1267                                 (void) printf("reclaim\t%llu\n",
1268                                     cb.cb_snapused);
1269                         } else if (cb.cb_dryrun) {
1270                                 (void) printf(gettext("would reclaim %s\n"),
1271                                     buf);
1272                         } else {
1273                                 (void) printf(gettext("will reclaim %s\n"),
1274                                     buf);
1275                         }
1276                 }
1277
1278                 if (!cb.cb_dryrun) {
1279                         if (cb.cb_doclones) {
1280                                 cb.cb_batchedsnaps = fnvlist_alloc();
1281                                 err = destroy_clones(&cb);
1282                                 if (err == 0) {
1283                                         err = zfs_destroy_snaps_nvl(g_zfs,
1284                                             cb.cb_batchedsnaps, B_FALSE);
1285                                 }
1286                                 if (err != 0) {
1287                                         rv = 1;
1288                                         goto out;
1289                                 }
1290                         }
1291                         if (err == 0) {
1292                                 err = zfs_destroy_snaps_nvl(g_zfs, cb.cb_nvl,
1293                                     cb.cb_defer_destroy);
1294                         }
1295                 }
1296
1297                 if (err != 0)
1298                         rv = 1;
1299         } else {
1300                 /* Open the given dataset */
1301                 if ((zhp = zfs_open(g_zfs, argv[0], type)) == NULL)
1302                         return (1);
1303
1304                 cb.cb_target = zhp;
1305
1306                 /*
1307                  * Perform an explicit check for pools before going any further.
1308                  */
1309                 if (!cb.cb_recurse && strchr(zfs_get_name(zhp), '/') == NULL &&
1310                     zfs_get_type(zhp) == ZFS_TYPE_FILESYSTEM) {
1311                         (void) fprintf(stderr, gettext("cannot destroy '%s': "
1312                             "operation does not apply to pools\n"),
1313                             zfs_get_name(zhp));
1314                         (void) fprintf(stderr, gettext("use 'zfs destroy -r "
1315                             "%s' to destroy all datasets in the pool\n"),
1316                             zfs_get_name(zhp));
1317                         (void) fprintf(stderr, gettext("use 'zpool destroy %s' "
1318                             "to destroy the pool itself\n"), zfs_get_name(zhp));
1319                         rv = 1;
1320                         goto out;
1321                 }
1322
1323                 /*
1324                  * Check for any dependents and/or clones.
1325                  */
1326                 cb.cb_first = B_TRUE;
1327                 if (!cb.cb_doclones &&
1328                     zfs_iter_dependents(zhp, B_TRUE, destroy_check_dependent,
1329                     &cb) != 0) {
1330                         rv = 1;
1331                         goto out;
1332                 }
1333
1334                 if (cb.cb_error) {
1335                         rv = 1;
1336                         goto out;
1337                 }
1338
1339                 cb.cb_batchedsnaps = fnvlist_alloc();
1340                 if (zfs_iter_dependents(zhp, B_FALSE, destroy_callback,
1341                     &cb) != 0) {
1342                         rv = 1;
1343                         goto out;
1344                 }
1345
1346                 /*
1347                  * Do the real thing.  The callback will close the
1348                  * handle regardless of whether it succeeds or not.
1349                  */
1350                 err = destroy_callback(zhp, &cb);
1351                 zhp = NULL;
1352                 if (err == 0) {
1353                         err = zfs_destroy_snaps_nvl(g_zfs,
1354                             cb.cb_batchedsnaps, cb.cb_defer_destroy);
1355                 }
1356                 if (err != 0)
1357                         rv = 1;
1358         }
1359
1360 out:
1361         fnvlist_free(cb.cb_batchedsnaps);
1362         fnvlist_free(cb.cb_nvl);
1363         if (zhp != NULL)
1364                 zfs_close(zhp);
1365         return (rv);
1366 }
1367
1368 static boolean_t
1369 is_recvd_column(zprop_get_cbdata_t *cbp)
1370 {
1371         int i;
1372         zfs_get_column_t col;
1373
1374         for (i = 0; i < ZFS_GET_NCOLS &&
1375             (col = cbp->cb_columns[i]) != GET_COL_NONE; i++)
1376                 if (col == GET_COL_RECVD)
1377                         return (B_TRUE);
1378         return (B_FALSE);
1379 }
1380
1381 /*
1382  * zfs get [-rHp] [-o all | field[,field]...] [-s source[,source]...]
1383  *      < all | property[,property]... > < fs | snap | vol > ...
1384  *
1385  *      -r      recurse over any child datasets
1386  *      -H      scripted mode.  Headers are stripped, and fields are separated
1387  *              by tabs instead of spaces.
1388  *      -o      Set of fields to display.  One of "name,property,value,
1389  *              received,source". Default is "name,property,value,source".
1390  *              "all" is an alias for all five.
1391  *      -s      Set of sources to allow.  One of
1392  *              "local,default,inherited,received,temporary,none".  Default is
1393  *              all six.
1394  *      -p      Display values in parsable (literal) format.
1395  *
1396  *  Prints properties for the given datasets.  The user can control which
1397  *  columns to display as well as which property types to allow.
1398  */
1399
1400 /*
1401  * Invoked to display the properties for a single dataset.
1402  */
1403 static int
1404 get_callback(zfs_handle_t *zhp, void *data)
1405 {
1406         char buf[ZFS_MAXPROPLEN];
1407         char rbuf[ZFS_MAXPROPLEN];
1408         zprop_source_t sourcetype;
1409         char source[ZFS_MAXNAMELEN];
1410         zprop_get_cbdata_t *cbp = data;
1411         nvlist_t *user_props = zfs_get_user_props(zhp);
1412         zprop_list_t *pl = cbp->cb_proplist;
1413         nvlist_t *propval;
1414         char *strval;
1415         char *sourceval;
1416         boolean_t received = is_recvd_column(cbp);
1417
1418         for (; pl != NULL; pl = pl->pl_next) {
1419                 char *recvdval = NULL;
1420                 /*
1421                  * Skip the special fake placeholder.  This will also skip over
1422                  * the name property when 'all' is specified.
1423                  */
1424                 if (pl->pl_prop == ZFS_PROP_NAME &&
1425                     pl == cbp->cb_proplist)
1426                         continue;
1427
1428                 if (pl->pl_prop != ZPROP_INVAL) {
1429                         if (zfs_prop_get(zhp, pl->pl_prop, buf,
1430                             sizeof (buf), &sourcetype, source,
1431                             sizeof (source),
1432                             cbp->cb_literal) != 0) {
1433                                 if (pl->pl_all)
1434                                         continue;
1435                                 if (!zfs_prop_valid_for_type(pl->pl_prop,
1436                                     ZFS_TYPE_DATASET)) {
1437                                         (void) fprintf(stderr,
1438                                             gettext("No such property '%s'\n"),
1439                                             zfs_prop_to_name(pl->pl_prop));
1440                                         continue;
1441                                 }
1442                                 sourcetype = ZPROP_SRC_NONE;
1443                                 (void) strlcpy(buf, "-", sizeof (buf));
1444                         }
1445
1446                         if (received && (zfs_prop_get_recvd(zhp,
1447                             zfs_prop_to_name(pl->pl_prop), rbuf, sizeof (rbuf),
1448                             cbp->cb_literal) == 0))
1449                                 recvdval = rbuf;
1450
1451                         zprop_print_one_property(zfs_get_name(zhp), cbp,
1452                             zfs_prop_to_name(pl->pl_prop),
1453                             buf, sourcetype, source, recvdval);
1454                 } else if (zfs_prop_userquota(pl->pl_user_prop)) {
1455                         sourcetype = ZPROP_SRC_LOCAL;
1456
1457                         if (zfs_prop_get_userquota(zhp, pl->pl_user_prop,
1458                             buf, sizeof (buf), cbp->cb_literal) != 0) {
1459                                 sourcetype = ZPROP_SRC_NONE;
1460                                 (void) strlcpy(buf, "-", sizeof (buf));
1461                         }
1462
1463                         zprop_print_one_property(zfs_get_name(zhp), cbp,
1464                             pl->pl_user_prop, buf, sourcetype, source, NULL);
1465                 } else if (zfs_prop_written(pl->pl_user_prop)) {
1466                         sourcetype = ZPROP_SRC_LOCAL;
1467
1468                         if (zfs_prop_get_written(zhp, pl->pl_user_prop,
1469                             buf, sizeof (buf), cbp->cb_literal) != 0) {
1470                                 sourcetype = ZPROP_SRC_NONE;
1471                                 (void) strlcpy(buf, "-", sizeof (buf));
1472                         }
1473
1474                         zprop_print_one_property(zfs_get_name(zhp), cbp,
1475                             pl->pl_user_prop, buf, sourcetype, source, NULL);
1476                 } else {
1477                         if (nvlist_lookup_nvlist(user_props,
1478                             pl->pl_user_prop, &propval) != 0) {
1479                                 if (pl->pl_all)
1480                                         continue;
1481                                 sourcetype = ZPROP_SRC_NONE;
1482                                 strval = "-";
1483                         } else {
1484                                 verify(nvlist_lookup_string(propval,
1485                                     ZPROP_VALUE, &strval) == 0);
1486                                 verify(nvlist_lookup_string(propval,
1487                                     ZPROP_SOURCE, &sourceval) == 0);
1488
1489                                 if (strcmp(sourceval,
1490                                     zfs_get_name(zhp)) == 0) {
1491                                         sourcetype = ZPROP_SRC_LOCAL;
1492                                 } else if (strcmp(sourceval,
1493                                     ZPROP_SOURCE_VAL_RECVD) == 0) {
1494                                         sourcetype = ZPROP_SRC_RECEIVED;
1495                                 } else {
1496                                         sourcetype = ZPROP_SRC_INHERITED;
1497                                         (void) strlcpy(source,
1498                                             sourceval, sizeof (source));
1499                                 }
1500                         }
1501
1502                         if (received && (zfs_prop_get_recvd(zhp,
1503                             pl->pl_user_prop, rbuf, sizeof (rbuf),
1504                             cbp->cb_literal) == 0))
1505                                 recvdval = rbuf;
1506
1507                         zprop_print_one_property(zfs_get_name(zhp), cbp,
1508                             pl->pl_user_prop, strval, sourcetype,
1509                             source, recvdval);
1510                 }
1511         }
1512
1513         return (0);
1514 }
1515
1516 static int
1517 zfs_do_get(int argc, char **argv)
1518 {
1519         zprop_get_cbdata_t cb = { 0 };
1520         int i, c, flags = ZFS_ITER_ARGS_CAN_BE_PATHS;
1521         int types = ZFS_TYPE_DATASET;
1522         char *value, *fields;
1523         int ret = 0;
1524         int limit = 0;
1525         zprop_list_t fake_name = { 0 };
1526
1527         /*
1528          * Set up default columns and sources.
1529          */
1530         cb.cb_sources = ZPROP_SRC_ALL;
1531         cb.cb_columns[0] = GET_COL_NAME;
1532         cb.cb_columns[1] = GET_COL_PROPERTY;
1533         cb.cb_columns[2] = GET_COL_VALUE;
1534         cb.cb_columns[3] = GET_COL_SOURCE;
1535         cb.cb_type = ZFS_TYPE_DATASET;
1536
1537         /* check options */
1538         while ((c = getopt(argc, argv, ":d:o:s:rt:Hp")) != -1) {
1539                 switch (c) {
1540                 case 'p':
1541                         cb.cb_literal = B_TRUE;
1542                         break;
1543                 case 'd':
1544                         limit = parse_depth(optarg, &flags);
1545                         break;
1546                 case 'r':
1547                         flags |= ZFS_ITER_RECURSE;
1548                         break;
1549                 case 'H':
1550                         cb.cb_scripted = B_TRUE;
1551                         break;
1552                 case ':':
1553                         (void) fprintf(stderr, gettext("missing argument for "
1554                             "'%c' option\n"), optopt);
1555                         usage(B_FALSE);
1556                         break;
1557                 case 'o':
1558                         /*
1559                          * Process the set of columns to display.  We zero out
1560                          * the structure to give us a blank slate.
1561                          */
1562                         bzero(&cb.cb_columns, sizeof (cb.cb_columns));
1563                         i = 0;
1564                         while (*optarg != '\0') {
1565                                 static char *col_subopts[] =
1566                                     { "name", "property", "value", "received",
1567                                     "source", "all", NULL };
1568
1569                                 if (i == ZFS_GET_NCOLS) {
1570                                         (void) fprintf(stderr, gettext("too "
1571                                             "many fields given to -o "
1572                                             "option\n"));
1573                                         usage(B_FALSE);
1574                                 }
1575
1576                                 switch (getsubopt(&optarg, col_subopts,
1577                                     &value)) {
1578                                 case 0:
1579                                         cb.cb_columns[i++] = GET_COL_NAME;
1580                                         break;
1581                                 case 1:
1582                                         cb.cb_columns[i++] = GET_COL_PROPERTY;
1583                                         break;
1584                                 case 2:
1585                                         cb.cb_columns[i++] = GET_COL_VALUE;
1586                                         break;
1587                                 case 3:
1588                                         cb.cb_columns[i++] = GET_COL_RECVD;
1589                                         flags |= ZFS_ITER_RECVD_PROPS;
1590                                         break;
1591                                 case 4:
1592                                         cb.cb_columns[i++] = GET_COL_SOURCE;
1593                                         break;
1594                                 case 5:
1595                                         if (i > 0) {
1596                                                 (void) fprintf(stderr,
1597                                                     gettext("\"all\" conflicts "
1598                                                     "with specific fields "
1599                                                     "given to -o option\n"));
1600                                                 usage(B_FALSE);
1601                                         }
1602                                         cb.cb_columns[0] = GET_COL_NAME;
1603                                         cb.cb_columns[1] = GET_COL_PROPERTY;
1604                                         cb.cb_columns[2] = GET_COL_VALUE;
1605                                         cb.cb_columns[3] = GET_COL_RECVD;
1606                                         cb.cb_columns[4] = GET_COL_SOURCE;
1607                                         flags |= ZFS_ITER_RECVD_PROPS;
1608                                         i = ZFS_GET_NCOLS;
1609                                         break;
1610                                 default:
1611                                         (void) fprintf(stderr,
1612                                             gettext("invalid column name "
1613                                             "'%s'\n"), value);
1614                                         usage(B_FALSE);
1615                                 }
1616                         }
1617                         break;
1618
1619                 case 's':
1620                         cb.cb_sources = 0;
1621                         while (*optarg != '\0') {
1622                                 static char *source_subopts[] = {
1623                                         "local", "default", "inherited",
1624                                         "received", "temporary", "none",
1625                                         NULL };
1626
1627                                 switch (getsubopt(&optarg, source_subopts,
1628                                     &value)) {
1629                                 case 0:
1630                                         cb.cb_sources |= ZPROP_SRC_LOCAL;
1631                                         break;
1632                                 case 1:
1633                                         cb.cb_sources |= ZPROP_SRC_DEFAULT;
1634                                         break;
1635                                 case 2:
1636                                         cb.cb_sources |= ZPROP_SRC_INHERITED;
1637                                         break;
1638                                 case 3:
1639                                         cb.cb_sources |= ZPROP_SRC_RECEIVED;
1640                                         break;
1641                                 case 4:
1642                                         cb.cb_sources |= ZPROP_SRC_TEMPORARY;
1643                                         break;
1644                                 case 5:
1645                                         cb.cb_sources |= ZPROP_SRC_NONE;
1646                                         break;
1647                                 default:
1648                                         (void) fprintf(stderr,
1649                                             gettext("invalid source "
1650                                             "'%s'\n"), value);
1651                                         usage(B_FALSE);
1652                                 }
1653                         }
1654                         break;
1655
1656                 case 't':
1657                         types = 0;
1658                         flags &= ~ZFS_ITER_PROP_LISTSNAPS;
1659                         while (*optarg != '\0') {
1660                                 static char *type_subopts[] = { "filesystem",
1661                                     "volume", "snapshot", "all", NULL };
1662
1663                                 switch (getsubopt(&optarg, type_subopts,
1664                                     &value)) {
1665                                 case 0:
1666                                         types |= ZFS_TYPE_FILESYSTEM;
1667                                         break;
1668                                 case 1:
1669                                         types |= ZFS_TYPE_VOLUME;
1670                                         break;
1671                                 case 2:
1672                                         types |= ZFS_TYPE_SNAPSHOT;
1673                                         break;
1674                                 case 3:
1675                                         types = ZFS_TYPE_DATASET;
1676                                         break;
1677
1678                                 default:
1679                                         (void) fprintf(stderr,
1680                                             gettext("invalid type '%s'\n"),
1681                                             value);
1682                                         usage(B_FALSE);
1683                                 }
1684                         }
1685                         break;
1686
1687                 case '?':
1688                         (void) fprintf(stderr, gettext("invalid option '%c'\n"),
1689                             optopt);
1690                         usage(B_FALSE);
1691                 }
1692         }
1693
1694         argc -= optind;
1695         argv += optind;
1696
1697         if (argc < 1) {
1698                 (void) fprintf(stderr, gettext("missing property "
1699                     "argument\n"));
1700                 usage(B_FALSE);
1701         }
1702
1703         fields = argv[0];
1704
1705         if (zprop_get_list(g_zfs, fields, &cb.cb_proplist, ZFS_TYPE_DATASET)
1706             != 0)
1707                 usage(B_FALSE);
1708
1709         argc--;
1710         argv++;
1711
1712         /*
1713          * As part of zfs_expand_proplist(), we keep track of the maximum column
1714          * width for each property.  For the 'NAME' (and 'SOURCE') columns, we
1715          * need to know the maximum name length.  However, the user likely did
1716          * not specify 'name' as one of the properties to fetch, so we need to
1717          * make sure we always include at least this property for
1718          * print_get_headers() to work properly.
1719          */
1720         if (cb.cb_proplist != NULL) {
1721                 fake_name.pl_prop = ZFS_PROP_NAME;
1722                 fake_name.pl_width = strlen(gettext("NAME"));
1723                 fake_name.pl_next = cb.cb_proplist;
1724                 cb.cb_proplist = &fake_name;
1725         }
1726
1727         cb.cb_first = B_TRUE;
1728
1729         /* run for each object */
1730         ret = zfs_for_each(argc, argv, flags, types, NULL,
1731             &cb.cb_proplist, limit, get_callback, &cb);
1732
1733         if (cb.cb_proplist == &fake_name)
1734                 zprop_free_list(fake_name.pl_next);
1735         else
1736                 zprop_free_list(cb.cb_proplist);
1737
1738         return (ret);
1739 }
1740
1741 /*
1742  * inherit [-rS] <property> <fs|vol> ...
1743  *
1744  *      -r      Recurse over all children
1745  *      -S      Revert to received value, if any
1746  *
1747  * For each dataset specified on the command line, inherit the given property
1748  * from its parent.  Inheriting a property at the pool level will cause it to
1749  * use the default value.  The '-r' flag will recurse over all children, and is
1750  * useful for setting a property on a hierarchy-wide basis, regardless of any
1751  * local modifications for each dataset.
1752  */
1753
1754 typedef struct inherit_cbdata {
1755         const char *cb_propname;
1756         boolean_t cb_received;
1757 } inherit_cbdata_t;
1758
1759 static int
1760 inherit_recurse_cb(zfs_handle_t *zhp, void *data)
1761 {
1762         inherit_cbdata_t *cb = data;
1763         zfs_prop_t prop = zfs_name_to_prop(cb->cb_propname);
1764
1765         /*
1766          * If we're doing it recursively, then ignore properties that
1767          * are not valid for this type of dataset.
1768          */
1769         if (prop != ZPROP_INVAL &&
1770             !zfs_prop_valid_for_type(prop, zfs_get_type(zhp)))
1771                 return (0);
1772
1773         return (zfs_prop_inherit(zhp, cb->cb_propname, cb->cb_received) != 0);
1774 }
1775
1776 static int
1777 inherit_cb(zfs_handle_t *zhp, void *data)
1778 {
1779         inherit_cbdata_t *cb = data;
1780
1781         return (zfs_prop_inherit(zhp, cb->cb_propname, cb->cb_received) != 0);
1782 }
1783
1784 static int
1785 zfs_do_inherit(int argc, char **argv)
1786 {
1787         int c;
1788         zfs_prop_t prop;
1789         inherit_cbdata_t cb = { 0 };
1790         char *propname;
1791         int ret = 0;
1792         int flags = 0;
1793         boolean_t received = B_FALSE;
1794
1795         /* check options */
1796         while ((c = getopt(argc, argv, "rS")) != -1) {
1797                 switch (c) {
1798                 case 'r':
1799                         flags |= ZFS_ITER_RECURSE;
1800                         break;
1801                 case 'S':
1802                         received = B_TRUE;
1803                         break;
1804                 case '?':
1805                 default:
1806                         (void) fprintf(stderr, gettext("invalid option '%c'\n"),
1807                             optopt);
1808                         usage(B_FALSE);
1809                 }
1810         }
1811
1812         argc -= optind;
1813         argv += optind;
1814
1815         /* check number of arguments */
1816         if (argc < 1) {
1817                 (void) fprintf(stderr, gettext("missing property argument\n"));
1818                 usage(B_FALSE);
1819         }
1820         if (argc < 2) {
1821                 (void) fprintf(stderr, gettext("missing dataset argument\n"));
1822                 usage(B_FALSE);
1823         }
1824
1825         propname = argv[0];
1826         argc--;
1827         argv++;
1828
1829         if ((prop = zfs_name_to_prop(propname)) != ZPROP_INVAL) {
1830                 if (zfs_prop_readonly(prop)) {
1831                         (void) fprintf(stderr, gettext(
1832                             "%s property is read-only\n"),
1833                             propname);
1834                         return (1);
1835                 }
1836                 if (!zfs_prop_inheritable(prop) && !received) {
1837                         (void) fprintf(stderr, gettext("'%s' property cannot "
1838                             "be inherited\n"), propname);
1839                         if (prop == ZFS_PROP_QUOTA ||
1840                             prop == ZFS_PROP_RESERVATION ||
1841                             prop == ZFS_PROP_REFQUOTA ||
1842                             prop == ZFS_PROP_REFRESERVATION)
1843                                 (void) fprintf(stderr, gettext("use 'zfs set "
1844                                     "%s=none' to clear\n"), propname);
1845                         return (1);
1846                 }
1847                 if (received && (prop == ZFS_PROP_VOLSIZE ||
1848                     prop == ZFS_PROP_VERSION)) {
1849                         (void) fprintf(stderr, gettext("'%s' property cannot "
1850                             "be reverted to a received value\n"), propname);
1851                         return (1);
1852                 }
1853         } else if (!zfs_prop_user(propname)) {
1854                 (void) fprintf(stderr, gettext("invalid property '%s'\n"),
1855                     propname);
1856                 usage(B_FALSE);
1857         }
1858
1859         cb.cb_propname = propname;
1860         cb.cb_received = received;
1861
1862         if (flags & ZFS_ITER_RECURSE) {
1863                 ret = zfs_for_each(argc, argv, flags, ZFS_TYPE_DATASET,
1864                     NULL, NULL, 0, inherit_recurse_cb, &cb);
1865         } else {
1866                 ret = zfs_for_each(argc, argv, flags, ZFS_TYPE_DATASET,
1867                     NULL, NULL, 0, inherit_cb, &cb);
1868         }
1869
1870         return (ret);
1871 }
1872
1873 typedef struct upgrade_cbdata {
1874         uint64_t cb_numupgraded;
1875         uint64_t cb_numsamegraded;
1876         uint64_t cb_numfailed;
1877         uint64_t cb_version;
1878         boolean_t cb_newer;
1879         boolean_t cb_foundone;
1880         char cb_lastfs[ZFS_MAXNAMELEN];
1881 } upgrade_cbdata_t;
1882
1883 static int
1884 same_pool(zfs_handle_t *zhp, const char *name)
1885 {
1886         int len1 = strcspn(name, "/@");
1887         const char *zhname = zfs_get_name(zhp);
1888         int len2 = strcspn(zhname, "/@");
1889
1890         if (len1 != len2)
1891                 return (B_FALSE);
1892         return (strncmp(name, zhname, len1) == 0);
1893 }
1894
1895 static int
1896 upgrade_list_callback(zfs_handle_t *zhp, void *data)
1897 {
1898         upgrade_cbdata_t *cb = data;
1899         int version = zfs_prop_get_int(zhp, ZFS_PROP_VERSION);
1900
1901         /* list if it's old/new */
1902         if ((!cb->cb_newer && version < ZPL_VERSION) ||
1903             (cb->cb_newer && version > ZPL_VERSION)) {
1904                 char *str;
1905                 if (cb->cb_newer) {
1906                         str = gettext("The following filesystems are "
1907                             "formatted using a newer software version and\n"
1908                             "cannot be accessed on the current system.\n\n");
1909                 } else {
1910                         str = gettext("The following filesystems are "
1911                             "out of date, and can be upgraded.  After being\n"
1912                             "upgraded, these filesystems (and any 'zfs send' "
1913                             "streams generated from\n"
1914                             "subsequent snapshots) will no longer be "
1915                             "accessible by older software versions.\n\n");
1916                 }
1917
1918                 if (!cb->cb_foundone) {
1919                         (void) puts(str);
1920                         (void) printf(gettext("VER  FILESYSTEM\n"));
1921                         (void) printf(gettext("---  ------------\n"));
1922                         cb->cb_foundone = B_TRUE;
1923                 }
1924
1925                 (void) printf("%2u   %s\n", version, zfs_get_name(zhp));
1926         }
1927
1928         return (0);
1929 }
1930
1931 static int
1932 upgrade_set_callback(zfs_handle_t *zhp, void *data)
1933 {
1934         upgrade_cbdata_t *cb = data;
1935         int version = zfs_prop_get_int(zhp, ZFS_PROP_VERSION);
1936         int needed_spa_version;
1937         int spa_version;
1938
1939         if (zfs_spa_version(zhp, &spa_version) < 0)
1940                 return (-1);
1941
1942         needed_spa_version = zfs_spa_version_map(cb->cb_version);
1943
1944         if (needed_spa_version < 0)
1945                 return (-1);
1946
1947         if (spa_version < needed_spa_version) {
1948                 /* can't upgrade */
1949                 (void) printf(gettext("%s: can not be "
1950                     "upgraded; the pool version needs to first "
1951                     "be upgraded\nto version %d\n\n"),
1952                     zfs_get_name(zhp), needed_spa_version);
1953                 cb->cb_numfailed++;
1954                 return (0);
1955         }
1956
1957         /* upgrade */
1958         if (version < cb->cb_version) {
1959                 char verstr[16];
1960                 (void) snprintf(verstr, sizeof (verstr),
1961                     "%llu", cb->cb_version);
1962                 if (cb->cb_lastfs[0] && !same_pool(zhp, cb->cb_lastfs)) {
1963                         /*
1964                          * If they did "zfs upgrade -a", then we could
1965                          * be doing ioctls to different pools.  We need
1966                          * to log this history once to each pool, and bypass
1967                          * the normal history logging that happens in main().
1968                          */
1969                         (void) zpool_log_history(g_zfs, history_str);
1970                         log_history = B_FALSE;
1971                 }
1972                 if (zfs_prop_set(zhp, "version", verstr) == 0)
1973                         cb->cb_numupgraded++;
1974                 else
1975                         cb->cb_numfailed++;
1976                 (void) strcpy(cb->cb_lastfs, zfs_get_name(zhp));
1977         } else if (version > cb->cb_version) {
1978                 /* can't downgrade */
1979                 (void) printf(gettext("%s: can not be downgraded; "
1980                     "it is already at version %u\n"),
1981                     zfs_get_name(zhp), version);
1982                 cb->cb_numfailed++;
1983         } else {
1984                 cb->cb_numsamegraded++;
1985         }
1986         return (0);
1987 }
1988
1989 /*
1990  * zfs upgrade
1991  * zfs upgrade -v
1992  * zfs upgrade [-r] [-V <version>] <-a | filesystem>
1993  */
1994 static int
1995 zfs_do_upgrade(int argc, char **argv)
1996 {
1997         boolean_t all = B_FALSE;
1998         boolean_t showversions = B_FALSE;
1999         int ret = 0;
2000         upgrade_cbdata_t cb = { 0 };
2001         char c;
2002         int flags = ZFS_ITER_ARGS_CAN_BE_PATHS;
2003
2004         /* check options */
2005         while ((c = getopt(argc, argv, "rvV:a")) != -1) {
2006                 switch (c) {
2007                 case 'r':
2008                         flags |= ZFS_ITER_RECURSE;
2009                         break;
2010                 case 'v':
2011                         showversions = B_TRUE;
2012                         break;
2013                 case 'V':
2014                         if (zfs_prop_string_to_index(ZFS_PROP_VERSION,
2015                             optarg, &cb.cb_version) != 0) {
2016                                 (void) fprintf(stderr,
2017                                     gettext("invalid version %s\n"), optarg);
2018                                 usage(B_FALSE);
2019                         }
2020                         break;
2021                 case 'a':
2022                         all = B_TRUE;
2023                         break;
2024                 case '?':
2025                 default:
2026                         (void) fprintf(stderr, gettext("invalid option '%c'\n"),
2027                             optopt);
2028                         usage(B_FALSE);
2029                 }
2030         }
2031
2032         argc -= optind;
2033         argv += optind;
2034
2035         if ((!all && !argc) && ((flags & ZFS_ITER_RECURSE) | cb.cb_version))
2036                 usage(B_FALSE);
2037         if (showversions && (flags & ZFS_ITER_RECURSE || all ||
2038             cb.cb_version || argc))
2039                 usage(B_FALSE);
2040         if ((all || argc) && (showversions))
2041                 usage(B_FALSE);
2042         if (all && argc)
2043                 usage(B_FALSE);
2044
2045         if (showversions) {
2046                 /* Show info on available versions. */
2047                 (void) printf(gettext("The following filesystem versions are "
2048                     "supported:\n\n"));
2049                 (void) printf(gettext("VER  DESCRIPTION\n"));
2050                 (void) printf("---  -----------------------------------------"
2051                     "---------------\n");
2052                 (void) printf(gettext(" 1   Initial ZFS filesystem version\n"));
2053                 (void) printf(gettext(" 2   Enhanced directory entries\n"));
2054                 (void) printf(gettext(" 3   Case insensitive and filesystem "
2055                     "user identifier (FUID)\n"));
2056                 (void) printf(gettext(" 4   userquota, groupquota "
2057                     "properties\n"));
2058                 (void) printf(gettext(" 5   System attributes\n"));
2059                 (void) printf(gettext("\nFor more information on a particular "
2060                     "version, including supported releases,\n"));
2061                 (void) printf("see the ZFS Administration Guide.\n\n");
2062                 ret = 0;
2063         } else if (argc || all) {
2064                 /* Upgrade filesystems */
2065                 if (cb.cb_version == 0)
2066                         cb.cb_version = ZPL_VERSION;
2067                 ret = zfs_for_each(argc, argv, flags, ZFS_TYPE_FILESYSTEM,
2068                     NULL, NULL, 0, upgrade_set_callback, &cb);
2069                 (void) printf(gettext("%llu filesystems upgraded\n"),
2070                     cb.cb_numupgraded);
2071                 if (cb.cb_numsamegraded) {
2072                         (void) printf(gettext("%llu filesystems already at "
2073                             "this version\n"),
2074                             cb.cb_numsamegraded);
2075                 }
2076                 if (cb.cb_numfailed != 0)
2077                         ret = 1;
2078         } else {
2079                 /* List old-version filesytems */
2080                 boolean_t found;
2081                 (void) printf(gettext("This system is currently running "
2082                     "ZFS filesystem version %llu.\n\n"), ZPL_VERSION);
2083
2084                 flags |= ZFS_ITER_RECURSE;
2085                 ret = zfs_for_each(0, NULL, flags, ZFS_TYPE_FILESYSTEM,
2086                     NULL, NULL, 0, upgrade_list_callback, &cb);
2087
2088                 found = cb.cb_foundone;
2089                 cb.cb_foundone = B_FALSE;
2090                 cb.cb_newer = B_TRUE;
2091
2092                 ret = zfs_for_each(0, NULL, flags, ZFS_TYPE_FILESYSTEM,
2093                     NULL, NULL, 0, upgrade_list_callback, &cb);
2094
2095                 if (!cb.cb_foundone && !found) {
2096                         (void) printf(gettext("All filesystems are "
2097                             "formatted with the current version.\n"));
2098                 }
2099         }
2100
2101         return (ret);
2102 }
2103
2104 /*
2105  * zfs userspace [-Hinp] [-o field[,...]] [-s field [-s field]...]
2106  *               [-S field [-S field]...] [-t type[,...]] filesystem | snapshot
2107  * zfs groupspace [-Hinp] [-o field[,...]] [-s field [-s field]...]
2108  *                [-S field [-S field]...] [-t type[,...]] filesystem | snapshot
2109  *
2110  *      -H      Scripted mode; elide headers and separate columns by tabs.
2111  *      -i      Translate SID to POSIX ID.
2112  *      -n      Print numeric ID instead of user/group name.
2113  *      -o      Control which fields to display.
2114  *      -p      Use exact (parseable) numeric output.
2115  *      -s      Specify sort columns, descending order.
2116  *      -S      Specify sort columns, ascending order.
2117  *      -t      Control which object types to display.
2118  *
2119  *      Displays space consumed by, and quotas on, each user in the specified
2120  *      filesystem or snapshot.
2121  */
2122
2123 /* us_field_types, us_field_hdr and us_field_names should be kept in sync */
2124 enum us_field_types {
2125         USFIELD_TYPE,
2126         USFIELD_NAME,
2127         USFIELD_USED,
2128         USFIELD_QUOTA
2129 };
2130 static char *us_field_hdr[] = { "TYPE", "NAME", "USED", "QUOTA" };
2131 static char *us_field_names[] = { "type", "name", "used", "quota" };
2132 #define USFIELD_LAST    (sizeof (us_field_names) / sizeof (char *))
2133
2134 #define USTYPE_PSX_GRP  (1 << 0)
2135 #define USTYPE_PSX_USR  (1 << 1)
2136 #define USTYPE_SMB_GRP  (1 << 2)
2137 #define USTYPE_SMB_USR  (1 << 3)
2138 #define USTYPE_ALL      \
2139         (USTYPE_PSX_GRP | USTYPE_PSX_USR | USTYPE_SMB_GRP | USTYPE_SMB_USR)
2140
2141 static int us_type_bits[] = {
2142         USTYPE_PSX_GRP,
2143         USTYPE_PSX_USR,
2144         USTYPE_SMB_GRP,
2145         USTYPE_SMB_USR,
2146         USTYPE_ALL
2147 };
2148 static char *us_type_names[] = { "posixgroup", "posxiuser", "smbgroup",
2149         "smbuser", "all" };
2150
2151 typedef struct us_node {
2152         nvlist_t        *usn_nvl;
2153         uu_avl_node_t   usn_avlnode;
2154         uu_list_node_t  usn_listnode;
2155 } us_node_t;
2156
2157 typedef struct us_cbdata {
2158         nvlist_t        **cb_nvlp;
2159         uu_avl_pool_t   *cb_avl_pool;
2160         uu_avl_t        *cb_avl;
2161         boolean_t       cb_numname;
2162         boolean_t       cb_nicenum;
2163         boolean_t       cb_sid2posix;
2164         zfs_userquota_prop_t cb_prop;
2165         zfs_sort_column_t *cb_sortcol;
2166         size_t          cb_width[USFIELD_LAST];
2167 } us_cbdata_t;
2168
2169 static boolean_t us_populated = B_FALSE;
2170
2171 typedef struct {
2172         zfs_sort_column_t *si_sortcol;
2173         boolean_t       si_numname;
2174 } us_sort_info_t;
2175
2176 static int
2177 us_field_index(char *field)
2178 {
2179         int i;
2180
2181         for (i = 0; i < USFIELD_LAST; i++) {
2182                 if (strcmp(field, us_field_names[i]) == 0)
2183                         return (i);
2184         }
2185
2186         return (-1);
2187 }
2188
2189 static int
2190 us_compare(const void *larg, const void *rarg, void *unused)
2191 {
2192         const us_node_t *l = larg;
2193         const us_node_t *r = rarg;
2194         us_sort_info_t *si = (us_sort_info_t *)unused;
2195         zfs_sort_column_t *sortcol = si->si_sortcol;
2196         boolean_t numname = si->si_numname;
2197         nvlist_t *lnvl = l->usn_nvl;
2198         nvlist_t *rnvl = r->usn_nvl;
2199         int rc = 0;
2200         boolean_t lvb, rvb;
2201
2202         for (; sortcol != NULL; sortcol = sortcol->sc_next) {
2203                 char *lvstr = "";
2204                 char *rvstr = "";
2205                 uint32_t lv32 = 0;
2206                 uint32_t rv32 = 0;
2207                 uint64_t lv64 = 0;
2208                 uint64_t rv64 = 0;
2209                 zfs_prop_t prop = sortcol->sc_prop;
2210                 const char *propname = NULL;
2211                 boolean_t reverse = sortcol->sc_reverse;
2212
2213                 switch (prop) {
2214                 case ZFS_PROP_TYPE:
2215                         propname = "type";
2216                         (void) nvlist_lookup_uint32(lnvl, propname, &lv32);
2217                         (void) nvlist_lookup_uint32(rnvl, propname, &rv32);
2218                         if (rv32 != lv32)
2219                                 rc = (rv32 < lv32) ? 1 : -1;
2220                         break;
2221                 case ZFS_PROP_NAME:
2222                         propname = "name";
2223                         if (numname) {
2224                                 (void) nvlist_lookup_uint64(lnvl, propname,
2225                                     &lv64);
2226                                 (void) nvlist_lookup_uint64(rnvl, propname,
2227                                     &rv64);
2228                                 if (rv64 != lv64)
2229                                         rc = (rv64 < lv64) ? 1 : -1;
2230                         } else {
2231                                 (void) nvlist_lookup_string(lnvl, propname,
2232                                     &lvstr);
2233                                 (void) nvlist_lookup_string(rnvl, propname,
2234                                     &rvstr);
2235                                 rc = strcmp(lvstr, rvstr);
2236                         }
2237                         break;
2238                 case ZFS_PROP_USED:
2239                 case ZFS_PROP_QUOTA:
2240                         if (!us_populated)
2241                                 break;
2242                         if (prop == ZFS_PROP_USED)
2243                                 propname = "used";
2244                         else
2245                                 propname = "quota";
2246                         (void) nvlist_lookup_uint64(lnvl, propname, &lv64);
2247                         (void) nvlist_lookup_uint64(rnvl, propname, &rv64);
2248                         if (rv64 != lv64)
2249                                 rc = (rv64 < lv64) ? 1 : -1;
2250                         break;
2251                 }
2252
2253                 if (rc != 0) {
2254                         if (rc < 0)
2255                                 return (reverse ? 1 : -1);
2256                         else
2257                                 return (reverse ? -1 : 1);
2258                 }
2259         }
2260
2261         /*
2262          * If entries still seem to be the same, check if they are of the same
2263          * type (smbentity is added only if we are doing SID to POSIX ID
2264          * translation where we can have duplicate type/name combinations).
2265          */
2266         if (nvlist_lookup_boolean_value(lnvl, "smbentity", &lvb) == 0 &&
2267             nvlist_lookup_boolean_value(rnvl, "smbentity", &rvb) == 0 &&
2268             lvb != rvb)
2269                 return (lvb < rvb ? -1 : 1);
2270
2271         return (0);
2272 }
2273
2274 static inline const char *
2275 us_type2str(unsigned field_type)
2276 {
2277         switch (field_type) {
2278         case USTYPE_PSX_USR:
2279                 return ("POSIX User");
2280         case USTYPE_PSX_GRP:
2281                 return ("POSIX Group");
2282         case USTYPE_SMB_USR:
2283                 return ("SMB User");
2284         case USTYPE_SMB_GRP:
2285                 return ("SMB Group");
2286         default:
2287                 return ("Undefined");
2288         }
2289 }
2290
2291 static int
2292 userspace_cb(void *arg, const char *domain, uid_t rid, uint64_t space)
2293 {
2294         us_cbdata_t *cb = (us_cbdata_t *)arg;
2295         zfs_userquota_prop_t prop = cb->cb_prop;
2296         char *name = NULL;
2297         char *propname;
2298         char sizebuf[32];
2299         us_node_t *node;
2300         uu_avl_pool_t *avl_pool = cb->cb_avl_pool;
2301         uu_avl_t *avl = cb->cb_avl;
2302         uu_avl_index_t idx;
2303         nvlist_t *props;
2304         us_node_t *n;
2305         zfs_sort_column_t *sortcol = cb->cb_sortcol;
2306         unsigned type;
2307         const char *typestr;
2308         size_t namelen;
2309         size_t typelen;
2310         size_t sizelen;
2311         int typeidx, nameidx, sizeidx;
2312         us_sort_info_t sortinfo = { sortcol, cb->cb_numname };
2313         boolean_t smbentity = B_FALSE;
2314
2315         if (nvlist_alloc(&props, NV_UNIQUE_NAME, 0) != 0)
2316                 nomem();
2317         node = safe_malloc(sizeof (us_node_t));
2318         uu_avl_node_init(node, &node->usn_avlnode, avl_pool);
2319         node->usn_nvl = props;
2320
2321         if (domain != NULL && domain[0] != '\0') {
2322                 /* SMB */
2323                 char sid[ZFS_MAXNAMELEN + 32];
2324                 uid_t id;
2325                 uint64_t classes;
2326 #ifdef sun
2327                 int err;
2328                 directory_error_t e;
2329 #endif
2330
2331                 smbentity = B_TRUE;
2332
2333                 (void) snprintf(sid, sizeof (sid), "%s-%u", domain, rid);
2334
2335                 if (prop == ZFS_PROP_GROUPUSED || prop == ZFS_PROP_GROUPQUOTA) {
2336                         type = USTYPE_SMB_GRP;
2337 #ifdef sun
2338                         err = sid_to_id(sid, B_FALSE, &id);
2339 #endif
2340                 } else {
2341                         type = USTYPE_SMB_USR;
2342 #ifdef sun
2343                         err = sid_to_id(sid, B_TRUE, &id);
2344 #endif
2345                 }
2346
2347 #ifdef sun
2348                 if (err == 0) {
2349                         rid = id;
2350                         if (!cb->cb_sid2posix) {
2351                                 e = directory_name_from_sid(NULL, sid, &name,
2352                                     &classes);
2353                                 if (e != NULL)
2354                                         directory_error_free(e);
2355                                 if (name == NULL)
2356                                         name = sid;
2357                         }
2358                 }
2359 #endif
2360         }
2361
2362         if (cb->cb_sid2posix || domain == NULL || domain[0] == '\0') {
2363                 /* POSIX or -i */
2364                 if (prop == ZFS_PROP_GROUPUSED || prop == ZFS_PROP_GROUPQUOTA) {
2365                         type = USTYPE_PSX_GRP;
2366                         if (!cb->cb_numname) {
2367                                 struct group *g;
2368
2369                                 if ((g = getgrgid(rid)) != NULL)
2370                                         name = g->gr_name;
2371                         }
2372                 } else {
2373                         type = USTYPE_PSX_USR;
2374                         if (!cb->cb_numname) {
2375                                 struct passwd *p;
2376
2377                                 if ((p = getpwuid(rid)) != NULL)
2378                                         name = p->pw_name;
2379                         }
2380                 }
2381         }
2382
2383         /*
2384          * Make sure that the type/name combination is unique when doing
2385          * SID to POSIX ID translation (hence changing the type from SMB to
2386          * POSIX).
2387          */
2388         if (cb->cb_sid2posix &&
2389             nvlist_add_boolean_value(props, "smbentity", smbentity) != 0)
2390                 nomem();
2391
2392         /* Calculate/update width of TYPE field */
2393         typestr = us_type2str(type);
2394         typelen = strlen(gettext(typestr));
2395         typeidx = us_field_index("type");
2396         if (typelen > cb->cb_width[typeidx])
2397                 cb->cb_width[typeidx] = typelen;
2398         if (nvlist_add_uint32(props, "type", type) != 0)
2399                 nomem();
2400
2401         /* Calculate/update width of NAME field */
2402         if ((cb->cb_numname && cb->cb_sid2posix) || name == NULL) {
2403                 if (nvlist_add_uint64(props, "name", rid) != 0)
2404                         nomem();
2405                 namelen = snprintf(NULL, 0, "%u", rid);
2406         } else {
2407                 if (nvlist_add_string(props, "name", name) != 0)
2408                         nomem();
2409                 namelen = strlen(name);
2410         }
2411         nameidx = us_field_index("name");
2412         if (namelen > cb->cb_width[nameidx])
2413                 cb->cb_width[nameidx] = namelen;
2414
2415         /*
2416          * Check if this type/name combination is in the list and update it;
2417          * otherwise add new node to the list.
2418          */
2419         if ((n = uu_avl_find(avl, node, &sortinfo, &idx)) == NULL) {
2420                 uu_avl_insert(avl, node, idx);
2421         } else {
2422                 nvlist_free(props);
2423                 free(node);
2424                 node = n;
2425                 props = node->usn_nvl;
2426         }
2427
2428         /* Calculate/update width of USED/QUOTA fields */
2429         if (cb->cb_nicenum)
2430                 zfs_nicenum(space, sizebuf, sizeof (sizebuf));
2431         else
2432                 (void) snprintf(sizebuf, sizeof (sizebuf), "%llu", space);
2433         sizelen = strlen(sizebuf);
2434         if (prop == ZFS_PROP_USERUSED || prop == ZFS_PROP_GROUPUSED) {
2435                 propname = "used";
2436                 if (!nvlist_exists(props, "quota"))
2437                         (void) nvlist_add_uint64(props, "quota", 0);
2438         } else {
2439                 propname = "quota";
2440                 if (!nvlist_exists(props, "used"))
2441                         (void) nvlist_add_uint64(props, "used", 0);
2442         }
2443         sizeidx = us_field_index(propname);
2444         if (sizelen > cb->cb_width[sizeidx])
2445                 cb->cb_width[sizeidx] = sizelen;
2446
2447         if (nvlist_add_uint64(props, propname, space) != 0)
2448                 nomem();
2449
2450         return (0);
2451 }
2452
2453 static void
2454 print_us_node(boolean_t scripted, boolean_t parsable, int *fields, int types,
2455     size_t *width, us_node_t *node)
2456 {
2457         nvlist_t *nvl = node->usn_nvl;
2458         char valstr[ZFS_MAXNAMELEN];
2459         boolean_t first = B_TRUE;
2460         int cfield = 0;
2461         int field;
2462         uint32_t ustype;
2463
2464         /* Check type */
2465         (void) nvlist_lookup_uint32(nvl, "type", &ustype);
2466         if (!(ustype & types))
2467                 return;
2468
2469         while ((field = fields[cfield]) != USFIELD_LAST) {
2470                 nvpair_t *nvp = NULL;
2471                 data_type_t type;
2472                 uint32_t val32;
2473                 uint64_t val64;
2474                 char *strval = NULL;
2475
2476                 while ((nvp = nvlist_next_nvpair(nvl, nvp)) != NULL) {
2477                         if (strcmp(nvpair_name(nvp),
2478                             us_field_names[field]) == 0)
2479                                 break;
2480                 }
2481
2482                 type = nvpair_type(nvp);
2483                 switch (type) {
2484                 case DATA_TYPE_UINT32:
2485                         (void) nvpair_value_uint32(nvp, &val32);
2486                         break;
2487                 case DATA_TYPE_UINT64:
2488                         (void) nvpair_value_uint64(nvp, &val64);
2489                         break;
2490                 case DATA_TYPE_STRING:
2491                         (void) nvpair_value_string(nvp, &strval);
2492                         break;
2493                 default:
2494                         (void) fprintf(stderr, "invalid data type\n");
2495                 }
2496
2497                 switch (field) {
2498                 case USFIELD_TYPE:
2499                         strval = (char *)us_type2str(val32);
2500                         break;
2501                 case USFIELD_NAME:
2502                         if (type == DATA_TYPE_UINT64) {
2503                                 (void) sprintf(valstr, "%llu", val64);
2504                                 strval = valstr;
2505                         }
2506                         break;
2507                 case USFIELD_USED:
2508                 case USFIELD_QUOTA:
2509                         if (type == DATA_TYPE_UINT64) {
2510                                 if (parsable) {
2511                                         (void) sprintf(valstr, "%llu", val64);
2512                                 } else {
2513                                         zfs_nicenum(val64, valstr,
2514                                             sizeof (valstr));
2515                                 }
2516                                 if (field == USFIELD_QUOTA &&
2517                                     strcmp(valstr, "0") == 0)
2518                                         strval = "none";
2519                                 else
2520                                         strval = valstr;
2521                         }
2522                         break;
2523                 }
2524
2525                 if (!first) {
2526                         if (scripted)
2527                                 (void) printf("\t");
2528                         else
2529                                 (void) printf("  ");
2530                 }
2531                 if (scripted)
2532                         (void) printf("%s", strval);
2533                 else if (field == USFIELD_TYPE || field == USFIELD_NAME)
2534                         (void) printf("%-*s", width[field], strval);
2535                 else
2536                         (void) printf("%*s", width[field], strval);
2537
2538                 first = B_FALSE;
2539                 cfield++;
2540         }
2541
2542         (void) printf("\n");
2543 }
2544
2545 static void
2546 print_us(boolean_t scripted, boolean_t parsable, int *fields, int types,
2547     size_t *width, boolean_t rmnode, uu_avl_t *avl)
2548 {
2549         us_node_t *node;
2550         const char *col;
2551         int cfield = 0;
2552         int field;
2553
2554         if (!scripted) {
2555                 boolean_t first = B_TRUE;
2556
2557                 while ((field = fields[cfield]) != USFIELD_LAST) {
2558                         col = gettext(us_field_hdr[field]);
2559                         if (field == USFIELD_TYPE || field == USFIELD_NAME) {
2560                                 (void) printf(first ? "%-*s" : "  %-*s",
2561                                     width[field], col);
2562                         } else {
2563                                 (void) printf(first ? "%*s" : "  %*s",
2564                                     width[field], col);
2565                         }
2566                         first = B_FALSE;
2567                         cfield++;
2568                 }
2569                 (void) printf("\n");
2570         }
2571
2572         for (node = uu_avl_first(avl); node; node = uu_avl_next(avl, node)) {
2573                 print_us_node(scripted, parsable, fields, types, width, node);
2574                 if (rmnode)
2575                         nvlist_free(node->usn_nvl);
2576         }
2577 }
2578
2579 static int
2580 zfs_do_userspace(int argc, char **argv)
2581 {
2582         zfs_handle_t *zhp;
2583         zfs_userquota_prop_t p;
2584
2585         uu_avl_pool_t *avl_pool;
2586         uu_avl_t *avl_tree;
2587         uu_avl_walk_t *walk;
2588         char *delim;
2589         char deffields[] = "type,name,used,quota";
2590         char *ofield = NULL;
2591         char *tfield = NULL;
2592         int cfield = 0;
2593         int fields[256];
2594         int i;
2595         boolean_t scripted = B_FALSE;
2596         boolean_t prtnum = B_FALSE;
2597         boolean_t parsable = B_FALSE;
2598         boolean_t sid2posix = B_FALSE;
2599         int ret = 0;
2600         int c;
2601         zfs_sort_column_t *sortcol = NULL;
2602         int types = USTYPE_PSX_USR | USTYPE_SMB_USR;
2603         us_cbdata_t cb;
2604         us_node_t *node;
2605         us_node_t *rmnode;
2606         uu_list_pool_t *listpool;
2607         uu_list_t *list;
2608         uu_avl_index_t idx = 0;
2609         uu_list_index_t idx2 = 0;
2610
2611         if (argc < 2)
2612                 usage(B_FALSE);
2613
2614         if (strcmp(argv[0], "groupspace") == 0)
2615                 /* Toggle default group types */
2616                 types = USTYPE_PSX_GRP | USTYPE_SMB_GRP;
2617
2618         while ((c = getopt(argc, argv, "nHpo:s:S:t:i")) != -1) {
2619                 switch (c) {
2620                 case 'n':
2621                         prtnum = B_TRUE;
2622                         break;
2623                 case 'H':
2624                         scripted = B_TRUE;
2625                         break;
2626                 case 'p':
2627                         parsable = B_TRUE;
2628                         break;
2629                 case 'o':
2630                         ofield = optarg;
2631                         break;
2632                 case 's':
2633                 case 'S':
2634                         if (zfs_add_sort_column(&sortcol, optarg,
2635                             c == 's' ? B_FALSE : B_TRUE) != 0) {
2636                                 (void) fprintf(stderr,
2637                                     gettext("invalid field '%s'\n"), optarg);
2638                                 usage(B_FALSE);
2639                         }
2640                         break;
2641                 case 't':
2642                         tfield = optarg;
2643                         break;
2644                 case 'i':
2645                         sid2posix = B_TRUE;
2646                         break;
2647                 case ':':
2648                         (void) fprintf(stderr, gettext("missing argument for "
2649                             "'%c' option\n"), optopt);
2650                         usage(B_FALSE);
2651                         break;
2652                 case '?':
2653                         (void) fprintf(stderr, gettext("invalid option '%c'\n"),
2654                             optopt);
2655                         usage(B_FALSE);
2656                 }
2657         }
2658
2659         argc -= optind;
2660         argv += optind;
2661
2662         if (argc < 1) {
2663                 (void) fprintf(stderr, gettext("missing dataset name\n"));
2664                 usage(B_FALSE);
2665         }
2666         if (argc > 1) {
2667                 (void) fprintf(stderr, gettext("too many arguments\n"));
2668                 usage(B_FALSE);
2669         }
2670
2671         /* Use default output fields if not specified using -o */
2672         if (ofield == NULL)
2673                 ofield = deffields;
2674         do {
2675                 if ((delim = strchr(ofield, ',')) != NULL)
2676                         *delim = '\0';
2677                 if ((fields[cfield++] = us_field_index(ofield)) == -1) {
2678                         (void) fprintf(stderr, gettext("invalid type '%s' "
2679                             "for -o option\n"), ofield);
2680                         return (-1);
2681                 }
2682                 if (delim != NULL)
2683                         ofield = delim + 1;
2684         } while (delim != NULL);
2685         fields[cfield] = USFIELD_LAST;
2686
2687         /* Override output types (-t option) */
2688         if (tfield != NULL) {
2689                 types = 0;
2690
2691                 do {
2692                         boolean_t found = B_FALSE;
2693
2694                         if ((delim = strchr(tfield, ',')) != NULL)
2695                                 *delim = '\0';
2696                         for (i = 0; i < sizeof (us_type_bits) / sizeof (int);
2697                             i++) {
2698                                 if (strcmp(tfield, us_type_names[i]) == 0) {
2699                                         found = B_TRUE;
2700                                         types |= us_type_bits[i];
2701                                         break;
2702                                 }
2703                         }
2704                         if (!found) {
2705                                 (void) fprintf(stderr, gettext("invalid type "
2706                                     "'%s' for -t option\n"), tfield);
2707                                 return (-1);
2708                         }
2709                         if (delim != NULL)
2710                                 tfield = delim + 1;
2711                 } while (delim != NULL);
2712         }
2713
2714         if ((zhp = zfs_open(g_zfs, argv[0], ZFS_TYPE_DATASET)) == NULL)
2715                 return (1);
2716
2717         if ((avl_pool = uu_avl_pool_create("us_avl_pool", sizeof (us_node_t),
2718             offsetof(us_node_t, usn_avlnode), us_compare, UU_DEFAULT)) == NULL)
2719                 nomem();
2720         if ((avl_tree = uu_avl_create(avl_pool, NULL, UU_DEFAULT)) == NULL)
2721                 nomem();
2722
2723         /* Always add default sorting columns */
2724         (void) zfs_add_sort_column(&sortcol, "type", B_FALSE);
2725         (void) zfs_add_sort_column(&sortcol, "name", B_FALSE);
2726
2727         cb.cb_sortcol = sortcol;
2728         cb.cb_numname = prtnum;
2729         cb.cb_nicenum = !parsable;
2730         cb.cb_avl_pool = avl_pool;
2731         cb.cb_avl = avl_tree;
2732         cb.cb_sid2posix = sid2posix;
2733
2734         for (i = 0; i < USFIELD_LAST; i++)
2735                 cb.cb_width[i] = strlen(gettext(us_field_hdr[i]));
2736
2737         for (p = 0; p < ZFS_NUM_USERQUOTA_PROPS; p++) {
2738                 if (((p == ZFS_PROP_USERUSED || p == ZFS_PROP_USERQUOTA) &&
2739                     !(types & (USTYPE_PSX_USR | USTYPE_SMB_USR))) ||
2740                     ((p == ZFS_PROP_GROUPUSED || p == ZFS_PROP_GROUPQUOTA) &&
2741                     !(types & (USTYPE_PSX_GRP | USTYPE_SMB_GRP))))
2742                         continue;
2743                 cb.cb_prop = p;
2744                 if ((ret = zfs_userspace(zhp, p, userspace_cb, &cb)) != 0)
2745                         return (ret);
2746         }
2747
2748         /* Sort the list */
2749         if ((node = uu_avl_first(avl_tree)) == NULL)
2750                 return (0);
2751
2752         us_populated = B_TRUE;
2753
2754         listpool = uu_list_pool_create("tmplist", sizeof (us_node_t),
2755             offsetof(us_node_t, usn_listnode), NULL, UU_DEFAULT);
2756         list = uu_list_create(listpool, NULL, UU_DEFAULT);
2757         uu_list_node_init(node, &node->usn_listnode, listpool);
2758
2759         while (node != NULL) {
2760                 rmnode = node;
2761                 node = uu_avl_next(avl_tree, node);
2762                 uu_avl_remove(avl_tree, rmnode);
2763                 if (uu_list_find(list, rmnode, NULL, &idx2) == NULL)
2764                         uu_list_insert(list, rmnode, idx2);
2765         }
2766
2767         for (node = uu_list_first(list); node != NULL;
2768             node = uu_list_next(list, node)) {
2769                 us_sort_info_t sortinfo = { sortcol, cb.cb_numname };
2770
2771                 if (uu_avl_find(avl_tree, node, &sortinfo, &idx) == NULL)
2772                         uu_avl_insert(avl_tree, node, idx);
2773         }
2774
2775         uu_list_destroy(list);
2776         uu_list_pool_destroy(listpool);
2777
2778         /* Print and free node nvlist memory */
2779         print_us(scripted, parsable, fields, types, cb.cb_width, B_TRUE,
2780             cb.cb_avl);
2781
2782         zfs_free_sort_columns(sortcol);
2783
2784         /* Clean up the AVL tree */
2785         if ((walk = uu_avl_walk_start(cb.cb_avl, UU_WALK_ROBUST)) == NULL)
2786                 nomem();
2787
2788         while ((node = uu_avl_walk_next(walk)) != NULL) {
2789                 uu_avl_remove(cb.cb_avl, node);
2790                 free(node);
2791         }
2792
2793         uu_avl_walk_end(walk);
2794         uu_avl_destroy(avl_tree);
2795         uu_avl_pool_destroy(avl_pool);
2796
2797         return (ret);
2798 }
2799
2800 /*
2801  * list [-r][-d max] [-H] [-o property[,property]...] [-t type[,type]...]
2802  *      [-s property [-s property]...] [-S property [-S property]...]
2803  *      <dataset> ...
2804  *
2805  *      -r      Recurse over all children
2806  *      -d      Limit recursion by depth.
2807  *      -H      Scripted mode; elide headers and separate columns by tabs
2808  *      -o      Control which fields to display.
2809  *      -t      Control which object types to display.
2810  *      -s      Specify sort columns, descending order.
2811  *      -S      Specify sort columns, ascending order.
2812  *
2813  * When given no arguments, lists all filesystems in the system.
2814  * Otherwise, list the specified datasets, optionally recursing down them if
2815  * '-r' is specified.
2816  */
2817 typedef struct list_cbdata {
2818         boolean_t       cb_first;
2819         boolean_t       cb_scripted;
2820         zprop_list_t    *cb_proplist;
2821 } list_cbdata_t;
2822
2823 /*
2824  * Given a list of columns to display, output appropriate headers for each one.
2825  */
2826 static void
2827 print_header(zprop_list_t *pl)
2828 {
2829         char headerbuf[ZFS_MAXPROPLEN];
2830         const char *header;
2831         int i;
2832         boolean_t first = B_TRUE;
2833         boolean_t right_justify;
2834
2835         for (; pl != NULL; pl = pl->pl_next) {
2836                 if (!first) {
2837                         (void) printf("  ");
2838                 } else {
2839                         first = B_FALSE;
2840                 }
2841
2842                 right_justify = B_FALSE;
2843                 if (pl->pl_prop != ZPROP_INVAL) {
2844                         header = zfs_prop_column_name(pl->pl_prop);
2845                         right_justify = zfs_prop_align_right(pl->pl_prop);
2846                 } else {
2847                         for (i = 0; pl->pl_user_prop[i] != '\0'; i++)
2848                                 headerbuf[i] = toupper(pl->pl_user_prop[i]);
2849                         headerbuf[i] = '\0';
2850                         header = headerbuf;
2851                 }
2852
2853                 if (pl->pl_next == NULL && !right_justify)
2854                         (void) printf("%s", header);
2855                 else if (right_justify)
2856                         (void) printf("%*s", pl->pl_width, header);
2857                 else
2858                         (void) printf("%-*s", pl->pl_width, header);
2859         }
2860
2861         (void) printf("\n");
2862 }
2863
2864 /*
2865  * Given a dataset and a list of fields, print out all the properties according
2866  * to the described layout.
2867  */
2868 static void
2869 print_dataset(zfs_handle_t *zhp, zprop_list_t *pl, boolean_t scripted)
2870 {
2871         boolean_t first = B_TRUE;
2872         char property[ZFS_MAXPROPLEN];
2873         nvlist_t *userprops = zfs_get_user_props(zhp);
2874         nvlist_t *propval;
2875         char *propstr;
2876         boolean_t right_justify;
2877         int width;
2878
2879         for (; pl != NULL; pl = pl->pl_next) {
2880                 if (!first) {
2881                         if (scripted)
2882                                 (void) printf("\t");
2883                         else
2884                                 (void) printf("  ");
2885                 } else {
2886                         first = B_FALSE;
2887                 }
2888
2889                 if (pl->pl_prop == ZFS_PROP_NAME) {
2890                         (void) strlcpy(property, zfs_get_name(zhp),
2891                             sizeof(property));
2892                         propstr = property;
2893                         right_justify = zfs_prop_align_right(pl->pl_prop);
2894                 } else if (pl->pl_prop != ZPROP_INVAL) {
2895                         if (zfs_prop_get(zhp, pl->pl_prop, property,
2896                             sizeof (property), NULL, NULL, 0, B_FALSE) != 0)
2897                                 propstr = "-";
2898                         else
2899                                 propstr = property;
2900
2901                         right_justify = zfs_prop_align_right(pl->pl_prop);
2902                 } else if (zfs_prop_userquota(pl->pl_user_prop)) {
2903                         if (zfs_prop_get_userquota(zhp, pl->pl_user_prop,
2904                             property, sizeof (property), B_FALSE) != 0)
2905                                 propstr = "-";
2906                         else
2907                                 propstr = property;
2908                         right_justify = B_TRUE;
2909                 } else if (zfs_prop_written(pl->pl_user_prop)) {
2910                         if (zfs_prop_get_written(zhp, pl->pl_user_prop,
2911                             property, sizeof (property), B_FALSE) != 0)
2912                                 propstr = "-";
2913                         else
2914                                 propstr = property;
2915                         right_justify = B_TRUE;
2916                 } else {
2917                         if (nvlist_lookup_nvlist(userprops,
2918                             pl->pl_user_prop, &propval) != 0)
2919                                 propstr = "-";
2920                         else
2921                                 verify(nvlist_lookup_string(propval,
2922                                     ZPROP_VALUE, &propstr) == 0);
2923                         right_justify = B_FALSE;
2924                 }
2925
2926                 width = pl->pl_width;
2927
2928                 /*
2929                  * If this is being called in scripted mode, or if this is the
2930                  * last column and it is left-justified, don't include a width
2931                  * format specifier.
2932                  */
2933                 if (scripted || (pl->pl_next == NULL && !right_justify))
2934                         (void) printf("%s", propstr);
2935                 else if (right_justify)
2936                         (void) printf("%*s", width, propstr);
2937                 else
2938                         (void) printf("%-*s", width, propstr);
2939         }
2940
2941         (void) printf("\n");
2942 }
2943
2944 /*
2945  * Generic callback function to list a dataset or snapshot.
2946  */
2947 static int
2948 list_callback(zfs_handle_t *zhp, void *data)
2949 {
2950         list_cbdata_t *cbp = data;
2951
2952         if (cbp->cb_first) {
2953                 if (!cbp->cb_scripted)
2954                         print_header(cbp->cb_proplist);
2955                 cbp->cb_first = B_FALSE;
2956         }
2957
2958         print_dataset(zhp, cbp->cb_proplist, cbp->cb_scripted);
2959
2960         return (0);
2961 }
2962
2963 static int
2964 zfs_do_list(int argc, char **argv)
2965 {
2966         int c;
2967         boolean_t scripted = B_FALSE;
2968         static char default_fields[] =
2969             "name,used,available,referenced,mountpoint";
2970         int types = ZFS_TYPE_DATASET;
2971         boolean_t types_specified = B_FALSE;
2972         char *fields = NULL;
2973         list_cbdata_t cb = { 0 };
2974         char *value;
2975         int limit = 0;
2976         int ret = 0;
2977         zfs_sort_column_t *sortcol = NULL;
2978         int flags = ZFS_ITER_PROP_LISTSNAPS | ZFS_ITER_ARGS_CAN_BE_PATHS;
2979
2980         /* check options */
2981         while ((c = getopt(argc, argv, ":d:o:rt:Hs:S:")) != -1) {
2982                 switch (c) {
2983                 case 'o':
2984                         fields = optarg;
2985                         break;
2986                 case 'd':
2987                         limit = parse_depth(optarg, &flags);
2988                         break;
2989                 case 'r':
2990                         flags |= ZFS_ITER_RECURSE;
2991                         break;
2992                 case 'H':
2993                         scripted = B_TRUE;
2994                         break;
2995                 case 's':
2996                         if (zfs_add_sort_column(&sortcol, optarg,
2997                             B_FALSE) != 0) {
2998                                 (void) fprintf(stderr,
2999                                     gettext("invalid property '%s'\n"), optarg);
3000                                 usage(B_FALSE);
3001                         }
3002                         break;
3003                 case 'S':
3004                         if (zfs_add_sort_column(&sortcol, optarg,
3005                             B_TRUE) != 0) {
3006                                 (void) fprintf(stderr,
3007                                     gettext("invalid property '%s'\n"), optarg);
3008                                 usage(B_FALSE);
3009                         }
3010                         break;
3011                 case 't':
3012                         types = 0;
3013                         types_specified = B_TRUE;
3014                         flags &= ~ZFS_ITER_PROP_LISTSNAPS;
3015                         while (*optarg != '\0') {
3016                                 static char *type_subopts[] = { "filesystem",
3017                                     "volume", "snapshot", "all", NULL };
3018
3019                                 switch (getsubopt(&optarg, type_subopts,
3020                                     &value)) {
3021                                 case 0:
3022                                         types |= ZFS_TYPE_FILESYSTEM;
3023                                         break;
3024                                 case 1:
3025                                         types |= ZFS_TYPE_VOLUME;
3026                                         break;
3027                                 case 2:
3028                                         types |= ZFS_TYPE_SNAPSHOT;
3029                                         break;
3030                                 case 3:
3031                                         types = ZFS_TYPE_DATASET;
3032                                         break;
3033
3034                                 default:
3035                                         (void) fprintf(stderr,
3036                                             gettext("invalid type '%s'\n"),
3037                                             value);
3038                                         usage(B_FALSE);
3039                                 }
3040                         }
3041                         break;
3042                 case ':':
3043                         (void) fprintf(stderr, gettext("missing argument for "
3044                             "'%c' option\n"), optopt);
3045                         usage(B_FALSE);
3046                         break;
3047                 case '?':
3048                         (void) fprintf(stderr, gettext("invalid option '%c'\n"),
3049                             optopt);
3050                         usage(B_FALSE);
3051                 }
3052         }
3053
3054         argc -= optind;
3055         argv += optind;
3056
3057         if (fields == NULL)
3058                 fields = default_fields;
3059
3060         /*
3061          * If we are only going to list snapshot names and sort by name,
3062          * then we can use faster version.
3063          */
3064         if (strcmp(fields, "name") == 0 && zfs_sort_only_by_name(sortcol))
3065                 flags |= ZFS_ITER_SIMPLE;
3066
3067         /*
3068          * If "-o space" and no types were specified, don't display snapshots.
3069          */
3070         if (strcmp(fields, "space") == 0 && types_specified == B_FALSE)
3071                 types &= ~ZFS_TYPE_SNAPSHOT;
3072
3073         /*
3074          * If the user specifies '-o all', the zprop_get_list() doesn't
3075          * normally include the name of the dataset.  For 'zfs list', we always
3076          * want this property to be first.
3077          */
3078         if (zprop_get_list(g_zfs, fields, &cb.cb_proplist, ZFS_TYPE_DATASET)
3079             != 0)
3080                 usage(B_FALSE);
3081
3082         cb.cb_scripted = scripted;
3083         cb.cb_first = B_TRUE;
3084
3085         ret = zfs_for_each(argc, argv, flags, types, sortcol, &cb.cb_proplist,
3086             limit, list_callback, &cb);
3087
3088         zprop_free_list(cb.cb_proplist);
3089         zfs_free_sort_columns(sortcol);
3090
3091         if (ret == 0 && cb.cb_first && !cb.cb_scripted)
3092                 (void) printf(gettext("no datasets available\n"));
3093
3094         return (ret);
3095 }
3096
3097 /*
3098  * zfs rename [-f] <fs | snap | vol> <fs | snap | vol>
3099  * zfs rename [-f] -p <fs | vol> <fs | vol>
3100  * zfs rename -r <snap> <snap>
3101  * zfs rename -u [-p] <fs> <fs>
3102  *
3103  * Renames the given dataset to another of the same type.
3104  *
3105  * The '-p' flag creates all the non-existing ancestors of the target first.
3106  */
3107 /* ARGSUSED */
3108 static int
3109 zfs_do_rename(int argc, char **argv)
3110 {
3111         zfs_handle_t *zhp;
3112         renameflags_t flags = { 0 };
3113         int c;
3114         int ret = 0;
3115         int types;
3116         boolean_t parents = B_FALSE;
3117         char *snapshot = NULL;
3118
3119         /* check options */
3120         while ((c = getopt(argc, argv, "fpru")) != -1) {
3121                 switch (c) {
3122                 case 'p':
3123                         parents = B_TRUE;
3124                         break;
3125                 case 'r':
3126                         flags.recurse = B_TRUE;
3127                         break;
3128                 case 'u':
3129                         flags.nounmount = B_TRUE;
3130                         break;
3131                 case 'f':
3132                         flags.forceunmount = B_TRUE;
3133                         break;
3134                 case '?':
3135                 default:
3136                         (void) fprintf(stderr, gettext("invalid option '%c'\n"),
3137                             optopt);
3138                         usage(B_FALSE);
3139                 }
3140         }
3141
3142         argc -= optind;
3143         argv += optind;
3144
3145         /* check number of arguments */
3146         if (argc < 1) {
3147                 (void) fprintf(stderr, gettext("missing source dataset "
3148                     "argument\n"));
3149                 usage(B_FALSE);
3150         }
3151         if (argc < 2) {
3152                 (void) fprintf(stderr, gettext("missing target dataset "
3153                     "argument\n"));
3154                 usage(B_FALSE);
3155         }
3156         if (argc > 2) {
3157                 (void) fprintf(stderr, gettext("too many arguments\n"));
3158                 usage(B_FALSE);
3159         }
3160
3161         if (flags.recurse && parents) {
3162                 (void) fprintf(stderr, gettext("-p and -r options are mutually "
3163                     "exclusive\n"));
3164                 usage(B_FALSE);
3165         }
3166
3167         if (flags.recurse && strchr(argv[0], '@') == 0) {
3168                 (void) fprintf(stderr, gettext("source dataset for recursive "
3169                     "rename must be a snapshot\n"));
3170                 usage(B_FALSE);
3171         }
3172
3173         if (flags.nounmount && parents) {
3174                 (void) fprintf(stderr, gettext("-u and -r options are mutually "
3175                     "exclusive\n"));
3176                 usage(B_FALSE);
3177         }
3178
3179         if (flags.nounmount)
3180                 types = ZFS_TYPE_FILESYSTEM;
3181         else if (parents)
3182                 types = ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME;
3183         else
3184                 types = ZFS_TYPE_DATASET;
3185
3186         if (flags.recurse) {
3187                 /*
3188                  * When we do recursive rename we are fine when the given
3189                  * snapshot for the given dataset doesn't exist - it can
3190                  * still exists below.
3191                  */
3192
3193                 snapshot = strchr(argv[0], '@');
3194                 assert(snapshot != NULL);
3195                 *snapshot = '\0';
3196                 snapshot++;
3197         }
3198
3199         if ((zhp = zfs_open(g_zfs, argv[0], types)) == NULL)
3200                 return (1);
3201
3202         /* If we were asked and the name looks good, try to create ancestors. */
3203         if (parents && zfs_name_valid(argv[1], zfs_get_type(zhp)) &&
3204             zfs_create_ancestors(g_zfs, argv[1]) != 0) {
3205                 zfs_close(zhp);
3206                 return (1);
3207         }
3208
3209         ret = (zfs_rename(zhp, snapshot, argv[1], flags) != 0);
3210
3211         zfs_close(zhp);
3212         return (ret);
3213 }
3214
3215 /*
3216  * zfs promote <fs>
3217  *
3218  * Promotes the given clone fs to be the parent
3219  */
3220 /* ARGSUSED */
3221 static int
3222 zfs_do_promote(int argc, char **argv)
3223 {
3224         zfs_handle_t *zhp;
3225         int ret = 0;
3226
3227         /* check options */
3228         if (argc > 1 && argv[1][0] == '-') {
3229                 (void) fprintf(stderr, gettext("invalid option '%c'\n"),
3230                     argv[1][1]);
3231                 usage(B_FALSE);
3232         }
3233
3234         /* check number of arguments */
3235         if (argc < 2) {
3236                 (void) fprintf(stderr, gettext("missing clone filesystem"
3237                     " argument\n"));
3238                 usage(B_FALSE);
3239         }
3240         if (argc > 2) {
3241                 (void) fprintf(stderr, gettext("too many arguments\n"));
3242                 usage(B_FALSE);
3243         }
3244
3245         zhp = zfs_open(g_zfs, argv[1], ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME);
3246         if (zhp == NULL)
3247                 return (1);
3248
3249         ret = (zfs_promote(zhp) != 0);
3250
3251
3252         zfs_close(zhp);
3253         return (ret);
3254 }
3255
3256 /*
3257  * zfs rollback [-rRf] <snapshot>
3258  *
3259  *      -r      Delete any intervening snapshots before doing rollback
3260  *      -R      Delete any snapshots and their clones
3261  *      -f      ignored for backwards compatability
3262  *
3263  * Given a filesystem, rollback to a specific snapshot, discarding any changes
3264  * since then and making it the active dataset.  If more recent snapshots exist,
3265  * the command will complain unless the '-r' flag is given.
3266  */
3267 typedef struct rollback_cbdata {
3268         uint64_t        cb_create;
3269         boolean_t       cb_first;
3270         int             cb_doclones;
3271         char            *cb_target;
3272         int             cb_error;
3273         boolean_t       cb_recurse;
3274         boolean_t       cb_dependent;
3275 } rollback_cbdata_t;
3276
3277 /*
3278  * Report any snapshots more recent than the one specified.  Used when '-r' is
3279  * not specified.  We reuse this same callback for the snapshot dependents - if
3280  * 'cb_dependent' is set, then this is a dependent and we should report it
3281  * without checking the transaction group.
3282  */
3283 static int
3284 rollback_check(zfs_handle_t *zhp, void *data)
3285 {
3286         rollback_cbdata_t *cbp = data;
3287
3288         if (cbp->cb_doclones) {
3289                 zfs_close(zhp);
3290                 return (0);
3291         }
3292
3293         if (!cbp->cb_dependent) {
3294                 if (strcmp(zfs_get_name(zhp), cbp->cb_target) != 0 &&
3295                     zfs_get_type(zhp) == ZFS_TYPE_SNAPSHOT &&
3296                     zfs_prop_get_int(zhp, ZFS_PROP_CREATETXG) >
3297                     cbp->cb_create) {
3298
3299                         if (cbp->cb_first && !cbp->cb_recurse) {
3300                                 (void) fprintf(stderr, gettext("cannot "
3301                                     "rollback to '%s': more recent snapshots "
3302                                     "exist\n"),
3303                                     cbp->cb_target);
3304                                 (void) fprintf(stderr, gettext("use '-r' to "
3305                                     "force deletion of the following "
3306                                     "snapshots:\n"));
3307                                 cbp->cb_first = 0;
3308                                 cbp->cb_error = 1;
3309                         }
3310
3311                         if (cbp->cb_recurse) {
3312                                 cbp->cb_dependent = B_TRUE;
3313                                 if (zfs_iter_dependents(zhp, B_TRUE,
3314                                     rollback_check, cbp) != 0) {
3315                                         zfs_close(zhp);
3316                                         return (-1);
3317                                 }
3318                                 cbp->cb_dependent = B_FALSE;
3319                         } else {
3320                                 (void) fprintf(stderr, "%s\n",
3321                                     zfs_get_name(zhp));
3322                         }
3323                 }
3324         } else {
3325                 if (cbp->cb_first && cbp->cb_recurse) {
3326                         (void) fprintf(stderr, gettext("cannot rollback to "
3327                             "'%s': clones of previous snapshots exist\n"),
3328                             cbp->cb_target);
3329                         (void) fprintf(stderr, gettext("use '-R' to "
3330                             "force deletion of the following clones and "
3331                             "dependents:\n"));
3332                         cbp->cb_first = 0;
3333                         cbp->cb_error = 1;
3334                 }
3335
3336                 (void) fprintf(stderr, "%s\n", zfs_get_name(zhp));
3337         }
3338
3339         zfs_close(zhp);
3340         return (0);
3341 }
3342
3343 static int
3344 zfs_do_rollback(int argc, char **argv)
3345 {
3346         int ret = 0;
3347         int c;
3348         boolean_t force = B_FALSE;
3349         rollback_cbdata_t cb = { 0 };
3350         zfs_handle_t *zhp, *snap;
3351         char parentname[ZFS_MAXNAMELEN];
3352         char *delim;
3353
3354         /* check options */
3355         while ((c = getopt(argc, argv, "rRf")) != -1) {
3356                 switch (c) {
3357                 case 'r':
3358                         cb.cb_recurse = 1;
3359                         break;
3360                 case 'R':
3361                         cb.cb_recurse = 1;
3362                         cb.cb_doclones = 1;
3363                         break;
3364                 case 'f':
3365                         force = B_TRUE;
3366                         break;
3367                 case '?':
3368                         (void) fprintf(stderr, gettext("invalid option '%c'\n"),
3369                             optopt);
3370                         usage(B_FALSE);
3371                 }
3372         }
3373
3374         argc -= optind;
3375         argv += optind;
3376
3377         /* check number of arguments */
3378         if (argc < 1) {
3379                 (void) fprintf(stderr, gettext("missing dataset argument\n"));
3380                 usage(B_FALSE);
3381         }
3382         if (argc > 1) {
3383                 (void) fprintf(stderr, gettext("too many arguments\n"));
3384                 usage(B_FALSE);
3385         }
3386
3387         /* open the snapshot */
3388         if ((snap = zfs_open(g_zfs, argv[0], ZFS_TYPE_SNAPSHOT)) == NULL)
3389                 return (1);
3390
3391         /* open the parent dataset */
3392         (void) strlcpy(parentname, argv[0], sizeof (parentname));
3393         verify((delim = strrchr(parentname, '@')) != NULL);
3394         *delim = '\0';
3395         if ((zhp = zfs_open(g_zfs, parentname, ZFS_TYPE_DATASET)) == NULL) {
3396                 zfs_close(snap);
3397                 return (1);
3398         }
3399
3400         /*
3401          * Check for more recent snapshots and/or clones based on the presence
3402          * of '-r' and '-R'.
3403          */
3404         cb.cb_target = argv[0];
3405         cb.cb_create = zfs_prop_get_int(snap, ZFS_PROP_CREATETXG);
3406         cb.cb_first = B_TRUE;
3407         cb.cb_error = 0;
3408         if ((ret = zfs_iter_children(zhp, rollback_check, &cb)) != 0)
3409                 goto out;
3410
3411         if ((ret = cb.cb_error) != 0)
3412                 goto out;
3413
3414         /*
3415          * Rollback parent to the given snapshot.
3416          */
3417         ret = zfs_rollback(zhp, snap, force);
3418
3419 out:
3420         zfs_close(snap);
3421         zfs_close(zhp);
3422
3423         if (ret == 0)
3424                 return (0);
3425         else
3426                 return (1);
3427 }
3428
3429 /*
3430  * zfs set property=value { fs | snap | vol } ...
3431  *
3432  * Sets the given property for all datasets specified on the command line.
3433  */
3434 typedef struct set_cbdata {
3435         char            *cb_propname;
3436         char            *cb_value;
3437 } set_cbdata_t;
3438
3439 static int
3440 set_callback(zfs_handle_t *zhp, void *data)
3441 {
3442         set_cbdata_t *cbp = data;
3443
3444         if (zfs_prop_set(zhp, cbp->cb_propname, cbp->cb_value) != 0) {
3445                 switch (libzfs_errno(g_zfs)) {
3446                 case EZFS_MOUNTFAILED:
3447                         (void) fprintf(stderr, gettext("property may be set "
3448                             "but unable to remount filesystem\n"));
3449                         break;
3450                 case EZFS_SHARENFSFAILED:
3451                         (void) fprintf(stderr, gettext("property may be set "
3452                             "but unable to reshare filesystem\n"));
3453                         break;
3454                 }
3455                 return (1);
3456         }
3457         return (0);
3458 }
3459
3460 static int
3461 zfs_do_set(int argc, char **argv)
3462 {
3463         set_cbdata_t cb;
3464         int ret = 0;
3465
3466         /* check for options */
3467         if (argc > 1 && argv[1][0] == '-') {
3468                 (void) fprintf(stderr, gettext("invalid option '%c'\n"),
3469                     argv[1][1]);
3470                 usage(B_FALSE);
3471         }
3472
3473         /* check number of arguments */
3474         if (argc < 2) {
3475                 (void) fprintf(stderr, gettext("missing property=value "
3476                     "argument\n"));
3477                 usage(B_FALSE);
3478         }
3479         if (argc < 3) {
3480                 (void) fprintf(stderr, gettext("missing dataset name\n"));
3481                 usage(B_FALSE);
3482         }
3483
3484         /* validate property=value argument */
3485         cb.cb_propname = argv[1];
3486         if (((cb.cb_value = strchr(cb.cb_propname, '=')) == NULL) ||
3487             (cb.cb_value[1] == '\0')) {
3488                 (void) fprintf(stderr, gettext("missing value in "
3489                     "property=value argument\n"));
3490                 usage(B_FALSE);
3491         }
3492
3493         *cb.cb_value = '\0';
3494         cb.cb_value++;
3495
3496         if (*cb.cb_propname == '\0') {
3497                 (void) fprintf(stderr,
3498                     gettext("missing property in property=value argument\n"));
3499                 usage(B_FALSE);
3500         }
3501
3502         ret = zfs_for_each(argc - 2, argv + 2, 0,
3503             ZFS_TYPE_DATASET, NULL, NULL, 0, set_callback, &cb);
3504
3505         return (ret);
3506 }
3507
3508 typedef struct snap_cbdata {
3509         nvlist_t *sd_nvl;
3510         boolean_t sd_recursive;
3511         const char *sd_snapname;
3512 } snap_cbdata_t;
3513
3514 static int
3515 zfs_snapshot_cb(zfs_handle_t *zhp, void *arg)
3516 {
3517         snap_cbdata_t *sd = arg;
3518         char *name;
3519         int rv = 0;
3520         int error;
3521
3522         if (sd->sd_recursive &&
3523             zfs_prop_get_int(zhp, ZFS_PROP_INCONSISTENT) != 0) {
3524                 zfs_close(zhp);
3525                 return (0);
3526         }
3527
3528         error = asprintf(&name, "%s@%s", zfs_get_name(zhp), sd->sd_snapname);
3529         if (error == -1)
3530                 nomem();
3531         fnvlist_add_boolean(sd->sd_nvl, name);
3532         free(name);
3533
3534         if (sd->sd_recursive)
3535                 rv = zfs_iter_filesystems(zhp, zfs_snapshot_cb, sd);
3536         zfs_close(zhp);
3537         return (rv);
3538 }
3539
3540 /*
3541  * zfs snapshot [-r] [-o prop=value] ... <fs@snap>
3542  *
3543  * Creates a snapshot with the given name.  While functionally equivalent to
3544  * 'zfs create', it is a separate command to differentiate intent.
3545  */
3546 static int
3547 zfs_do_snapshot(int argc, char **argv)
3548 {
3549         int ret = 0;
3550         char c;
3551         nvlist_t *props;
3552         snap_cbdata_t sd = { 0 };
3553         boolean_t multiple_snaps = B_FALSE;
3554
3555         if (nvlist_alloc(&props, NV_UNIQUE_NAME, 0) != 0)
3556                 nomem();
3557         if (nvlist_alloc(&sd.sd_nvl, NV_UNIQUE_NAME, 0) != 0)
3558                 nomem();
3559
3560         /* check options */
3561         while ((c = getopt(argc, argv, "ro:")) != -1) {
3562                 switch (c) {
3563                 case 'o':
3564                         if (parseprop(props))
3565                                 return (1);
3566                         break;
3567                 case 'r':
3568                         sd.sd_recursive = B_TRUE;
3569                         multiple_snaps = B_TRUE;
3570                         break;
3571                 case '?':
3572                         (void) fprintf(stderr, gettext("invalid option '%c'\n"),
3573                             optopt);
3574                         goto usage;
3575                 }
3576         }
3577
3578         argc -= optind;
3579         argv += optind;
3580
3581         /* check number of arguments */
3582         if (argc < 1) {
3583                 (void) fprintf(stderr, gettext("missing snapshot argument\n"));
3584                 goto usage;
3585         }
3586
3587         if (argc > 1)
3588                 multiple_snaps = B_TRUE;
3589         for (; argc > 0; argc--, argv++) {
3590                 char *atp;
3591                 zfs_handle_t *zhp;
3592
3593                 atp = strchr(argv[0], '@');
3594                 if (atp == NULL)
3595                         goto usage;
3596                 *atp = '\0';
3597                 sd.sd_snapname = atp + 1;
3598                 zhp = zfs_open(g_zfs, argv[0],
3599                     ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME);
3600                 if (zhp == NULL)
3601                         goto usage;
3602                 if (zfs_snapshot_cb(zhp, &sd) != 0)
3603                         goto usage;
3604         }
3605
3606         ret = zfs_snapshot_nvl(g_zfs, sd.sd_nvl, props);
3607         nvlist_free(sd.sd_nvl);
3608         nvlist_free(props);
3609         if (ret != 0 && multiple_snaps)
3610                 (void) fprintf(stderr, gettext("no snapshots were created\n"));
3611         return (ret != 0);
3612
3613 usage:
3614         nvlist_free(sd.sd_nvl);
3615         nvlist_free(props);
3616         usage(B_FALSE);
3617         return (-1);
3618 }
3619
3620 /*
3621  * Send a backup stream to stdout.
3622  */
3623 static int
3624 zfs_do_send(int argc, char **argv)
3625 {
3626         char *fromname = NULL;
3627         char *toname = NULL;
3628         char *cp;
3629         zfs_handle_t *zhp;
3630         sendflags_t flags = { 0 };
3631         int c, err;
3632         nvlist_t *dbgnv = NULL;
3633         boolean_t extraverbose = B_FALSE;
3634
3635         /* check options */
3636         while ((c = getopt(argc, argv, ":i:I:RDpvnP")) != -1) {
3637                 switch (c) {
3638                 case 'i':
3639                         if (fromname)
3640                                 usage(B_FALSE);
3641                         fromname = optarg;
3642                         break;
3643                 case 'I':
3644                         if (fromname)
3645                                 usage(B_FALSE);
3646                         fromname = optarg;
3647                         flags.doall = B_TRUE;
3648                         break;
3649                 case 'R':
3650                         flags.replicate = B_TRUE;
3651                         break;
3652                 case 'p':
3653                         flags.props = B_TRUE;
3654                         break;
3655                 case 'P':
3656                         flags.parsable = B_TRUE;
3657                         flags.verbose = B_TRUE;
3658                         break;
3659                 case 'v':
3660                         if (flags.verbose)
3661                                 extraverbose = B_TRUE;
3662                         flags.verbose = B_TRUE;
3663                         flags.progress = B_TRUE;
3664                         break;
3665                 case 'D':
3666                         flags.dedup = B_TRUE;
3667                         break;
3668                 case 'n':
3669                         flags.dryrun = B_TRUE;
3670                         break;
3671                 case ':':
3672                         (void) fprintf(stderr, gettext("missing argument for "
3673                             "'%c' option\n"), optopt);
3674                         usage(B_FALSE);
3675                         break;
3676                 case '?':
3677                         (void) fprintf(stderr, gettext("invalid option '%c'\n"),
3678                             optopt);
3679                         usage(B_FALSE);
3680                 }
3681         }
3682
3683         argc -= optind;
3684         argv += optind;
3685
3686         /* check number of arguments */
3687         if (argc < 1) {
3688                 (void) fprintf(stderr, gettext("missing snapshot argument\n"));
3689                 usage(B_FALSE);
3690         }
3691         if (argc > 1) {
3692                 (void) fprintf(stderr, gettext("too many arguments\n"));
3693                 usage(B_FALSE);
3694         }
3695
3696         if (!flags.dryrun && isatty(STDOUT_FILENO)) {
3697                 (void) fprintf(stderr,
3698                     gettext("Error: Stream can not be written to a terminal.\n"
3699                     "You must redirect standard output.\n"));
3700                 return (1);
3701         }
3702
3703         cp = strchr(argv[0], '@');
3704         if (cp == NULL) {
3705                 (void) fprintf(stderr,
3706                     gettext("argument must be a snapshot\n"));
3707                 usage(B_FALSE);
3708         }
3709         *cp = '\0';
3710         toname = cp + 1;
3711         zhp = zfs_open(g_zfs, argv[0], ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME);
3712         if (zhp == NULL)
3713                 return (1);
3714
3715         /*
3716          * If they specified the full path to the snapshot, chop off
3717          * everything except the short name of the snapshot, but special
3718          * case if they specify the origin.
3719          */
3720         if (fromname && (cp = strchr(fromname, '@')) != NULL) {
3721                 char origin[ZFS_MAXNAMELEN];
3722                 zprop_source_t src;
3723
3724                 (void) zfs_prop_get(zhp, ZFS_PROP_ORIGIN,
3725                     origin, sizeof (origin), &src, NULL, 0, B_FALSE);
3726
3727                 if (strcmp(origin, fromname) == 0) {
3728                         fromname = NULL;
3729                         flags.fromorigin = B_TRUE;
3730                 } else {
3731                         *cp = '\0';
3732                         if (cp != fromname && strcmp(argv[0], fromname)) {
3733                                 (void) fprintf(stderr,
3734                                     gettext("incremental source must be "
3735                                     "in same filesystem\n"));
3736                                 usage(B_FALSE);
3737                         }
3738                         fromname = cp + 1;
3739                         if (strchr(fromname, '@') || strchr(fromname, '/')) {
3740                                 (void) fprintf(stderr,
3741                                     gettext("invalid incremental source\n"));
3742                                 usage(B_FALSE);
3743                         }
3744                 }
3745         }
3746
3747         if (flags.replicate && fromname == NULL)
3748                 flags.doall = B_TRUE;
3749
3750         err = zfs_send(zhp, fromname, toname, &flags, STDOUT_FILENO, NULL, 0,
3751             extraverbose ? &dbgnv : NULL);
3752
3753         if (extraverbose && dbgnv != NULL) {
3754                 /*
3755                  * dump_nvlist prints to stdout, but that's been
3756                  * redirected to a file.  Make it print to stderr
3757                  * instead.
3758                  */
3759                 (void) dup2(STDERR_FILENO, STDOUT_FILENO);
3760                 dump_nvlist(dbgnv, 0);
3761                 nvlist_free(dbgnv);
3762         }
3763         zfs_close(zhp);
3764
3765         return (err != 0);
3766 }
3767
3768 /*
3769  * zfs receive [-vnFu] [-d | -e] <fs@snap>
3770  *
3771  * Restore a backup stream from stdin.
3772  */
3773 static int
3774 zfs_do_receive(int argc, char **argv)
3775 {
3776         int c, err;
3777         recvflags_t flags = { 0 };
3778
3779         /* check options */
3780         while ((c = getopt(argc, argv, ":denuvF")) != -1) {
3781                 switch (c) {
3782                 case 'd':
3783                         flags.isprefix = B_TRUE;
3784                         break;
3785                 case 'e':
3786                         flags.isprefix = B_TRUE;
3787                         flags.istail = B_TRUE;
3788                         break;
3789                 case 'n':
3790                         flags.dryrun = B_TRUE;
3791                         break;
3792                 case 'u':
3793                         flags.nomount = B_TRUE;
3794                         break;
3795                 case 'v':
3796                         flags.verbose = B_TRUE;
3797                         break;
3798                 case 'F':
3799                         flags.force = B_TRUE;
3800                         break;
3801                 case ':':
3802                         (void) fprintf(stderr, gettext("missing argument for "
3803                             "'%c' option\n"), optopt);
3804                         usage(B_FALSE);
3805                         break;
3806                 case '?':
3807                         (void) fprintf(stderr, gettext("invalid option '%c'\n"),
3808                             optopt);
3809                         usage(B_FALSE);
3810                 }
3811         }
3812
3813         argc -= optind;
3814         argv += optind;
3815
3816         /* check number of arguments */
3817         if (argc < 1) {
3818                 (void) fprintf(stderr, gettext("missing snapshot argument\n"));
3819                 usage(B_FALSE);
3820         }
3821         if (argc > 1) {
3822                 (void) fprintf(stderr, gettext("too many arguments\n"));
3823                 usage(B_FALSE);
3824         }
3825
3826         if (isatty(STDIN_FILENO)) {
3827                 (void) fprintf(stderr,
3828                     gettext("Error: Backup stream can not be read "
3829                     "from a terminal.\n"
3830                     "You must redirect standard input.\n"));
3831                 return (1);
3832         }
3833
3834         err = zfs_receive(g_zfs, argv[0], &flags, STDIN_FILENO, NULL);
3835
3836         return (err != 0);
3837 }
3838
3839 /*
3840  * allow/unallow stuff
3841  */
3842 /* copied from zfs/sys/dsl_deleg.h */
3843 #define ZFS_DELEG_PERM_CREATE           "create"
3844 #define ZFS_DELEG_PERM_DESTROY          "destroy"
3845 #define ZFS_DELEG_PERM_SNAPSHOT         "snapshot"
3846 #define ZFS_DELEG_PERM_ROLLBACK         "rollback"
3847 #define ZFS_DELEG_PERM_CLONE            "clone"
3848 #define ZFS_DELEG_PERM_PROMOTE          "promote"
3849 #define ZFS_DELEG_PERM_RENAME           "rename"
3850 #define ZFS_DELEG_PERM_MOUNT            "mount"
3851 #define ZFS_DELEG_PERM_SHARE            "share"
3852 #define ZFS_DELEG_PERM_SEND             "send"
3853 #define ZFS_DELEG_PERM_RECEIVE          "receive"
3854 #define ZFS_DELEG_PERM_ALLOW            "allow"
3855 #define ZFS_DELEG_PERM_USERPROP         "userprop"
3856 #define ZFS_DELEG_PERM_VSCAN            "vscan" /* ??? */
3857 #define ZFS_DELEG_PERM_USERQUOTA        "userquota"
3858 #define ZFS_DELEG_PERM_GROUPQUOTA       "groupquota"
3859 #define ZFS_DELEG_PERM_USERUSED         "userused"
3860 #define ZFS_DELEG_PERM_GROUPUSED        "groupused"
3861 #define ZFS_DELEG_PERM_HOLD             "hold"
3862 #define ZFS_DELEG_PERM_RELEASE          "release"
3863 #define ZFS_DELEG_PERM_DIFF             "diff"
3864
3865 #define ZFS_NUM_DELEG_NOTES ZFS_DELEG_NOTE_NONE
3866
3867 static zfs_deleg_perm_tab_t zfs_deleg_perm_tbl[] = {
3868         { ZFS_DELEG_PERM_ALLOW, ZFS_DELEG_NOTE_ALLOW },
3869         { ZFS_DELEG_PERM_CLONE, ZFS_DELEG_NOTE_CLONE },
3870         { ZFS_DELEG_PERM_CREATE, ZFS_DELEG_NOTE_CREATE },
3871         { ZFS_DELEG_PERM_DESTROY, ZFS_DELEG_NOTE_DESTROY },
3872         { ZFS_DELEG_PERM_DIFF, ZFS_DELEG_NOTE_DIFF},
3873         { ZFS_DELEG_PERM_HOLD, ZFS_DELEG_NOTE_HOLD },
3874         { ZFS_DELEG_PERM_MOUNT, ZFS_DELEG_NOTE_MOUNT },
3875         { ZFS_DELEG_PERM_PROMOTE, ZFS_DELEG_NOTE_PROMOTE },
3876         { ZFS_DELEG_PERM_RECEIVE, ZFS_DELEG_NOTE_RECEIVE },
3877         { ZFS_DELEG_PERM_RELEASE, ZFS_DELEG_NOTE_RELEASE },
3878         { ZFS_DELEG_PERM_RENAME, ZFS_DELEG_NOTE_RENAME },
3879         { ZFS_DELEG_PERM_ROLLBACK, ZFS_DELEG_NOTE_ROLLBACK },
3880         { ZFS_DELEG_PERM_SEND, ZFS_DELEG_NOTE_SEND },
3881         { ZFS_DELEG_PERM_SHARE, ZFS_DELEG_NOTE_SHARE },
3882         { ZFS_DELEG_PERM_SNAPSHOT, ZFS_DELEG_NOTE_SNAPSHOT },
3883
3884         { ZFS_DELEG_PERM_GROUPQUOTA, ZFS_DELEG_NOTE_GROUPQUOTA },
3885         { ZFS_DELEG_PERM_GROUPUSED, ZFS_DELEG_NOTE_GROUPUSED },
3886         { ZFS_DELEG_PERM_USERPROP, ZFS_DELEG_NOTE_USERPROP },
3887         { ZFS_DELEG_PERM_USERQUOTA, ZFS_DELEG_NOTE_USERQUOTA },
3888         { ZFS_DELEG_PERM_USERUSED, ZFS_DELEG_NOTE_USERUSED },
3889         { NULL, ZFS_DELEG_NOTE_NONE }
3890 };
3891
3892 /* permission structure */
3893 typedef struct deleg_perm {
3894         zfs_deleg_who_type_t    dp_who_type;
3895         const char              *dp_name;
3896         boolean_t               dp_local;
3897         boolean_t               dp_descend;
3898 } deleg_perm_t;
3899
3900 /* */
3901 typedef struct deleg_perm_node {
3902         deleg_perm_t            dpn_perm;
3903
3904         uu_avl_node_t           dpn_avl_node;
3905 } deleg_perm_node_t;
3906
3907 typedef struct fs_perm fs_perm_t;
3908
3909 /* permissions set */
3910 typedef struct who_perm {
3911         zfs_deleg_who_type_t    who_type;
3912         const char              *who_name;              /* id */
3913         char                    who_ug_name[256];       /* user/group name */
3914         fs_perm_t               *who_fsperm;            /* uplink */
3915
3916         uu_avl_t                *who_deleg_perm_avl;    /* permissions */
3917 } who_perm_t;
3918
3919 /* */
3920 typedef struct who_perm_node {
3921         who_perm_t      who_perm;
3922         uu_avl_node_t   who_avl_node;
3923 } who_perm_node_t;
3924
3925 typedef struct fs_perm_set fs_perm_set_t;
3926 /* fs permissions */
3927 struct fs_perm {
3928         const char              *fsp_name;
3929
3930         uu_avl_t                *fsp_sc_avl;    /* sets,create */
3931         uu_avl_t                *fsp_uge_avl;   /* user,group,everyone */
3932
3933         fs_perm_set_t           *fsp_set;       /* uplink */
3934 };
3935
3936 /* */
3937 typedef struct fs_perm_node {
3938         fs_perm_t       fspn_fsperm;
3939         uu_avl_t        *fspn_avl;
3940
3941         uu_list_node_t  fspn_list_node;
3942 } fs_perm_node_t;
3943
3944 /* top level structure */
3945 struct fs_perm_set {
3946         uu_list_pool_t  *fsps_list_pool;
3947         uu_list_t       *fsps_list; /* list of fs_perms */
3948
3949         uu_avl_pool_t   *fsps_named_set_avl_pool;
3950         uu_avl_pool_t   *fsps_who_perm_avl_pool;
3951         uu_avl_pool_t   *fsps_deleg_perm_avl_pool;
3952 };
3953
3954 static inline const char *
3955 deleg_perm_type(zfs_deleg_note_t note)
3956 {
3957         /* subcommands */
3958         switch (note) {
3959                 /* SUBCOMMANDS */
3960                 /* OTHER */
3961         case ZFS_DELEG_NOTE_GROUPQUOTA:
3962         case ZFS_DELEG_NOTE_GROUPUSED:
3963         case ZFS_DELEG_NOTE_USERPROP:
3964         case ZFS_DELEG_NOTE_USERQUOTA:
3965         case ZFS_DELEG_NOTE_USERUSED:
3966                 /* other */
3967                 return (gettext("other"));
3968         default:
3969                 return (gettext("subcommand"));
3970         }
3971 }
3972
3973 static int inline
3974 who_type2weight(zfs_deleg_who_type_t who_type)
3975 {
3976         int res;
3977         switch (who_type) {
3978                 case ZFS_DELEG_NAMED_SET_SETS:
3979                 case ZFS_DELEG_NAMED_SET:
3980                         res = 0;
3981                         break;
3982                 case ZFS_DELEG_CREATE_SETS:
3983                 case ZFS_DELEG_CREATE:
3984                         res = 1;
3985                         break;
3986                 case ZFS_DELEG_USER_SETS:
3987                 case ZFS_DELEG_USER:
3988                         res = 2;
3989                         break;
3990                 case ZFS_DELEG_GROUP_SETS:
3991                 case ZFS_DELEG_GROUP:
3992                         res = 3;
3993                         break;
3994                 case ZFS_DELEG_EVERYONE_SETS:
3995                 case ZFS_DELEG_EVERYONE:
3996                         res = 4;
3997                         break;
3998                 default:
3999                         res = -1;
4000         }
4001
4002         return (res);
4003 }
4004
4005 /* ARGSUSED */
4006 static int
4007 who_perm_compare(const void *larg, const void *rarg, void *unused)
4008 {
4009         const who_perm_node_t *l = larg;
4010         const who_perm_node_t *r = rarg;
4011         zfs_deleg_who_type_t ltype = l->who_perm.who_type;
4012         zfs_deleg_who_type_t rtype = r->who_perm.who_type;
4013         int lweight = who_type2weight(ltype);
4014         int rweight = who_type2weight(rtype);
4015         int res = lweight - rweight;
4016         if (res == 0)
4017                 res = strncmp(l->who_perm.who_name, r->who_perm.who_name,
4018                     ZFS_MAX_DELEG_NAME-1);
4019
4020         if (res == 0)
4021                 return (0);
4022         if (res > 0)
4023                 return (1);
4024         else
4025                 return (-1);
4026 }
4027
4028 /* ARGSUSED */
4029 static int
4030 deleg_perm_compare(const void *larg, const void *rarg, void *unused)
4031 {
4032         const deleg_perm_node_t *l = larg;
4033         const deleg_perm_node_t *r = rarg;
4034         int res =  strncmp(l->dpn_perm.dp_name, r->dpn_perm.dp_name,
4035             ZFS_MAX_DELEG_NAME-1);
4036
4037         if (res == 0)
4038                 return (0);
4039
4040         if (res > 0)
4041                 return (1);
4042         else
4043                 return (-1);
4044 }
4045
4046 static inline void
4047 fs_perm_set_init(fs_perm_set_t *fspset)
4048 {
4049         bzero(fspset, sizeof (fs_perm_set_t));
4050
4051         if ((fspset->fsps_list_pool = uu_list_pool_create("fsps_list_pool",
4052             sizeof (fs_perm_node_t), offsetof(fs_perm_node_t, fspn_list_node),
4053             NULL, UU_DEFAULT)) == NULL)
4054                 nomem();
4055         if ((fspset->fsps_list = uu_list_create(fspset->fsps_list_pool, NULL,
4056             UU_DEFAULT)) == NULL)
4057                 nomem();
4058
4059         if ((fspset->fsps_named_set_avl_pool = uu_avl_pool_create(
4060             "named_set_avl_pool", sizeof (who_perm_node_t), offsetof(
4061             who_perm_node_t, who_avl_node), who_perm_compare,
4062             UU_DEFAULT)) == NULL)
4063                 nomem();
4064
4065         if ((fspset->fsps_who_perm_avl_pool = uu_avl_pool_create(
4066             "who_perm_avl_pool", sizeof (who_perm_node_t), offsetof(
4067             who_perm_node_t, who_avl_node), who_perm_compare,
4068             UU_DEFAULT)) == NULL)
4069                 nomem();
4070
4071         if ((fspset->fsps_deleg_perm_avl_pool = uu_avl_pool_create(
4072             "deleg_perm_avl_pool", sizeof (deleg_perm_node_t), offsetof(
4073             deleg_perm_node_t, dpn_avl_node), deleg_perm_compare, UU_DEFAULT))
4074             == NULL)
4075                 nomem();
4076 }
4077
4078 static inline void fs_perm_fini(fs_perm_t *);
4079 static inline void who_perm_fini(who_perm_t *);
4080
4081 static inline void
4082 fs_perm_set_fini(fs_perm_set_t *fspset)
4083 {
4084         fs_perm_node_t *node = uu_list_first(fspset->fsps_list);
4085
4086         while (node != NULL) {
4087                 fs_perm_node_t *next_node =
4088                     uu_list_next(fspset->fsps_list, node);
4089                 fs_perm_t *fsperm = &node->fspn_fsperm;
4090                 fs_perm_fini(fsperm);
4091                 uu_list_remove(fspset->fsps_list, node);
4092                 free(node);
4093                 node = next_node;
4094         }
4095
4096         uu_avl_pool_destroy(fspset->fsps_named_set_avl_pool);
4097         uu_avl_pool_destroy(fspset->fsps_who_perm_avl_pool);
4098         uu_avl_pool_destroy(fspset->fsps_deleg_perm_avl_pool);
4099 }
4100
4101 static inline void
4102 deleg_perm_init(deleg_perm_t *deleg_perm, zfs_deleg_who_type_t type,
4103     const char *name)
4104 {
4105         deleg_perm->dp_who_type = type;
4106         deleg_perm->dp_name = name;
4107 }
4108
4109 static inline void
4110 who_perm_init(who_perm_t *who_perm, fs_perm_t *fsperm,
4111     zfs_deleg_who_type_t type, const char *name)
4112 {
4113         uu_avl_pool_t   *pool;
4114         pool = fsperm->fsp_set->fsps_deleg_perm_avl_pool;
4115
4116         bzero(who_perm, sizeof (who_perm_t));
4117
4118         if ((who_perm->who_deleg_perm_avl = uu_avl_create(pool, NULL,
4119             UU_DEFAULT)) == NULL)
4120                 nomem();
4121
4122         who_perm->who_type = type;
4123         who_perm->who_name = name;
4124         who_perm->who_fsperm = fsperm;
4125 }
4126
4127 static inline void
4128 who_perm_fini(who_perm_t *who_perm)
4129 {
4130         deleg_perm_node_t *node = uu_avl_first(who_perm->who_deleg_perm_avl);
4131
4132         while (node != NULL) {
4133                 deleg_perm_node_t *next_node =
4134                     uu_avl_next(who_perm->who_deleg_perm_avl, node);
4135
4136                 uu_avl_remove(who_perm->who_deleg_perm_avl, node);
4137                 free(node);
4138                 node = next_node;
4139         }
4140
4141         uu_avl_destroy(who_perm->who_deleg_perm_avl);
4142 }
4143
4144 static inline void
4145 fs_perm_init(fs_perm_t *fsperm, fs_perm_set_t *fspset, const char *fsname)
4146 {
4147         uu_avl_pool_t   *nset_pool = fspset->fsps_named_set_avl_pool;
4148         uu_avl_pool_t   *who_pool = fspset->fsps_who_perm_avl_pool;
4149
4150         bzero(fsperm, sizeof (fs_perm_t));
4151
4152         if ((fsperm->fsp_sc_avl = uu_avl_create(nset_pool, NULL, UU_DEFAULT))
4153             == NULL)
4154                 nomem();
4155
4156         if ((fsperm->fsp_uge_avl = uu_avl_create(who_pool, NULL, UU_DEFAULT))
4157             == NULL)
4158                 nomem();
4159
4160         fsperm->fsp_set = fspset;
4161         fsperm->fsp_name = fsname;
4162 }
4163
4164 static inline void
4165 fs_perm_fini(fs_perm_t *fsperm)
4166 {
4167         who_perm_node_t *node = uu_avl_first(fsperm->fsp_sc_avl);
4168         while (node != NULL) {
4169                 who_perm_node_t *next_node = uu_avl_next(fsperm->fsp_sc_avl,
4170                     node);
4171                 who_perm_t *who_perm = &node->who_perm;
4172                 who_perm_fini(who_perm);
4173                 uu_avl_remove(fsperm->fsp_sc_avl, node);
4174                 free(node);
4175                 node = next_node;
4176         }
4177
4178         node = uu_avl_first(fsperm->fsp_uge_avl);
4179         while (node != NULL) {
4180                 who_perm_node_t *next_node = uu_avl_next(fsperm->fsp_uge_avl,
4181                     node);
4182                 who_perm_t *who_perm = &node->who_perm;
4183                 who_perm_fini(who_perm);
4184                 uu_avl_remove(fsperm->fsp_uge_avl, node);
4185                 free(node);
4186                 node = next_node;
4187         }
4188
4189         uu_avl_destroy(fsperm->fsp_sc_avl);
4190         uu_avl_destroy(fsperm->fsp_uge_avl);
4191 }
4192
4193 static void inline
4194 set_deleg_perm_node(uu_avl_t *avl, deleg_perm_node_t *node,
4195     zfs_deleg_who_type_t who_type, const char *name, char locality)
4196 {
4197         uu_avl_index_t idx = 0;
4198
4199         deleg_perm_node_t *found_node = NULL;
4200         deleg_perm_t    *deleg_perm = &node->dpn_perm;
4201
4202         deleg_perm_init(deleg_perm, who_type, name);
4203
4204         if ((found_node = uu_avl_find(avl, node, NULL, &idx))
4205             == NULL)
4206                 uu_avl_insert(avl, node, idx);
4207         else {
4208                 node = found_node;
4209                 deleg_perm = &node->dpn_perm;
4210         }
4211
4212
4213         switch (locality) {
4214         case ZFS_DELEG_LOCAL:
4215                 deleg_perm->dp_local = B_TRUE;
4216                 break;
4217         case ZFS_DELEG_DESCENDENT:
4218                 deleg_perm->dp_descend = B_TRUE;
4219                 break;
4220         case ZFS_DELEG_NA:
4221                 break;
4222         default:
4223                 assert(B_FALSE); /* invalid locality */
4224         }
4225 }
4226
4227 static inline int
4228 parse_who_perm(who_perm_t *who_perm, nvlist_t *nvl, char locality)
4229 {
4230         nvpair_t *nvp = NULL;
4231         fs_perm_set_t *fspset = who_perm->who_fsperm->fsp_set;
4232         uu_avl_t *avl = who_perm->who_deleg_perm_avl;
4233         zfs_deleg_who_type_t who_type = who_perm->who_type;
4234
4235         while ((nvp = nvlist_next_nvpair(nvl, nvp)) != NULL) {
4236                 const char *name = nvpair_name(nvp);
4237                 data_type_t type = nvpair_type(nvp);
4238                 uu_avl_pool_t *avl_pool = fspset->fsps_deleg_perm_avl_pool;
4239                 deleg_perm_node_t *node =
4240                     safe_malloc(sizeof (deleg_perm_node_t));
4241
4242                 assert(type == DATA_TYPE_BOOLEAN);
4243
4244                 uu_avl_node_init(node, &node->dpn_avl_node, avl_pool);
4245                 set_deleg_perm_node(avl, node, who_type, name, locality);
4246         }
4247
4248         return (0);
4249 }
4250
4251 static inline int
4252 parse_fs_perm(fs_perm_t *fsperm, nvlist_t *nvl)
4253 {
4254         nvpair_t *nvp = NULL;
4255         fs_perm_set_t *fspset = fsperm->fsp_set;
4256
4257         while ((nvp = nvlist_next_nvpair(nvl, nvp)) != NULL) {
4258                 nvlist_t *nvl2 = NULL;
4259                 const char *name = nvpair_name(nvp);
4260                 uu_avl_t *avl = NULL;
4261                 uu_avl_pool_t *avl_pool;
4262                 zfs_deleg_who_type_t perm_type = name[0];
4263                 char perm_locality = name[1];
4264                 const char *perm_name = name + 3;
4265                 boolean_t is_set = B_TRUE;
4266                 who_perm_t *who_perm = NULL;
4267
4268                 assert('$' == name[2]);
4269
4270                 if (nvpair_value_nvlist(nvp, &nvl2) != 0)
4271                         return (-1);
4272
4273                 switch (perm_type) {
4274                 case ZFS_DELEG_CREATE:
4275                 case ZFS_DELEG_CREATE_SETS:
4276                 case ZFS_DELEG_NAMED_SET:
4277                 case ZFS_DELEG_NAMED_SET_SETS:
4278                         avl_pool = fspset->fsps_named_set_avl_pool;
4279                         avl = fsperm->fsp_sc_avl;
4280                         break;
4281                 case ZFS_DELEG_USER:
4282                 case ZFS_DELEG_USER_SETS:
4283                 case ZFS_DELEG_GROUP:
4284                 case ZFS_DELEG_GROUP_SETS:
4285                 case ZFS_DELEG_EVERYONE:
4286                 case ZFS_DELEG_EVERYONE_SETS:
4287                         avl_pool = fspset->fsps_who_perm_avl_pool;
4288                         avl = fsperm->fsp_uge_avl;
4289                         break;
4290                 }
4291
4292                 if (is_set) {
4293                         who_perm_node_t *found_node = NULL;
4294                         who_perm_node_t *node = safe_malloc(
4295                             sizeof (who_perm_node_t));
4296                         who_perm = &node->who_perm;
4297                         uu_avl_index_t idx = 0;
4298
4299                         uu_avl_node_init(node, &node->who_avl_node, avl_pool);
4300                         who_perm_init(who_perm, fsperm, perm_type, perm_name);
4301
4302                         if ((found_node = uu_avl_find(avl, node, NULL, &idx))
4303                             == NULL) {
4304                                 if (avl == fsperm->fsp_uge_avl) {
4305                                         uid_t rid = 0;
4306                                         struct passwd *p = NULL;
4307                                         struct group *g = NULL;
4308                                         const char *nice_name = NULL;
4309
4310                                         switch (perm_type) {
4311                                         case ZFS_DELEG_USER_SETS:
4312                                         case ZFS_DELEG_USER:
4313                                                 rid = atoi(perm_name);
4314                                                 p = getpwuid(rid);
4315                                                 if (p)
4316                                                         nice_name = p->pw_name;
4317                                                 break;
4318                                         case ZFS_DELEG_GROUP_SETS:
4319                                         case ZFS_DELEG_GROUP:
4320                                                 rid = atoi(perm_name);
4321                                                 g = getgrgid(rid);
4322                                                 if (g)
4323                                                         nice_name = g->gr_name;
4324                                                 break;
4325                                         }
4326
4327                                         if (nice_name != NULL)
4328                                                 (void) strlcpy(
4329                                                     node->who_perm.who_ug_name,
4330                                                     nice_name, 256);
4331                                 }
4332
4333                                 uu_avl_insert(avl, node, idx);
4334                         } else {
4335                                 node = found_node;
4336                                 who_perm = &node->who_perm;
4337                         }
4338                 }
4339
4340                 (void) parse_who_perm(who_perm, nvl2, perm_locality);
4341         }
4342
4343         return (0);
4344 }
4345
4346 static inline int
4347 parse_fs_perm_set(fs_perm_set_t *fspset, nvlist_t *nvl)
4348 {
4349         nvpair_t *nvp = NULL;
4350         uu_avl_index_t idx = 0;
4351
4352         while ((nvp = nvlist_next_nvpair(nvl, nvp)) != NULL) {
4353                 nvlist_t *nvl2 = NULL;
4354                 const char *fsname = nvpair_name(nvp);
4355                 data_type_t type = nvpair_type(nvp);
4356                 fs_perm_t *fsperm = NULL;
4357                 fs_perm_node_t *node = safe_malloc(sizeof (fs_perm_node_t));
4358                 if (node == NULL)
4359                         nomem();
4360
4361                 fsperm = &node->fspn_fsperm;
4362
4363                 assert(DATA_TYPE_NVLIST == type);
4364
4365                 uu_list_node_init(node, &node->fspn_list_node,
4366                     fspset->fsps_list_pool);
4367
4368                 idx = uu_list_numnodes(fspset->fsps_list);
4369                 fs_perm_init(fsperm, fspset, fsname);
4370
4371                 if (nvpair_value_nvlist(nvp, &nvl2) != 0)
4372                         return (-1);
4373
4374                 (void) parse_fs_perm(fsperm, nvl2);
4375
4376                 uu_list_insert(fspset->fsps_list, node, idx);
4377         }
4378
4379         return (0);
4380 }
4381
4382 static inline const char *
4383 deleg_perm_comment(zfs_deleg_note_t note)
4384 {
4385         const char *str = "";
4386
4387         /* subcommands */
4388         switch (note) {
4389                 /* SUBCOMMANDS */
4390         case ZFS_DELEG_NOTE_ALLOW:
4391                 str = gettext("Must also have the permission that is being"
4392                     "\n\t\t\t\tallowed");
4393                 break;
4394         case ZFS_DELEG_NOTE_CLONE:
4395                 str = gettext("Must also have the 'create' ability and 'mount'"
4396                     "\n\t\t\t\tability in the origin file system");
4397                 break;
4398         case ZFS_DELEG_NOTE_CREATE:
4399                 str = gettext("Must also have the 'mount' ability");
4400                 break;
4401         case ZFS_DELEG_NOTE_DESTROY:
4402                 str = gettext("Must also have the 'mount' ability");
4403                 break;
4404         case ZFS_DELEG_NOTE_DIFF:
4405                 str = gettext("Allows lookup of paths within a dataset;"
4406                     "\n\t\t\t\tgiven an object number. Ordinary users need this"
4407                     "\n\t\t\t\tin order to use zfs diff");
4408                 break;
4409         case ZFS_DELEG_NOTE_HOLD:
4410                 str = gettext("Allows adding a user hold to a snapshot");
4411                 break;
4412         case ZFS_DELEG_NOTE_MOUNT:
4413                 str = gettext("Allows mount/umount of ZFS datasets");
4414                 break;
4415         case ZFS_DELEG_NOTE_PROMOTE:
4416                 str = gettext("Must also have the 'mount'\n\t\t\t\tand"
4417                     " 'promote' ability in the origin file system");
4418                 break;
4419         case ZFS_DELEG_NOTE_RECEIVE:
4420                 str = gettext("Must also have the 'mount' and 'create'"
4421                     " ability");
4422                 break;
4423         case ZFS_DELEG_NOTE_RELEASE:
4424                 str = gettext("Allows releasing a user hold which\n\t\t\t\t"
4425                     "might destroy the snapshot");
4426                 break;
4427         case ZFS_DELEG_NOTE_RENAME:
4428                 str = gettext("Must also have the 'mount' and 'create'"
4429                     "\n\t\t\t\tability in the new parent");
4430                 break;
4431         case ZFS_DELEG_NOTE_ROLLBACK:
4432                 str = gettext("");
4433                 break;
4434         case ZFS_DELEG_NOTE_SEND:
4435                 str = gettext("");
4436                 break;
4437         case ZFS_DELEG_NOTE_SHARE:
4438                 str = gettext("Allows sharing file systems over NFS or SMB"
4439                     "\n\t\t\t\tprotocols");
4440                 break;
4441         case ZFS_DELEG_NOTE_SNAPSHOT:
4442                 str = gettext("");
4443                 break;
4444 /*
4445  *      case ZFS_DELEG_NOTE_VSCAN:
4446  *              str = gettext("");
4447  *              break;
4448  */
4449                 /* OTHER */
4450         case ZFS_DELEG_NOTE_GROUPQUOTA:
4451                 str = gettext("Allows accessing any groupquota@... property");
4452                 break;
4453         case ZFS_DELEG_NOTE_GROUPUSED:
4454                 str = gettext("Allows reading any groupused@... property");
4455                 break;
4456         case ZFS_DELEG_NOTE_USERPROP:
4457                 str = gettext("Allows changing any user property");
4458                 break;
4459         case ZFS_DELEG_NOTE_USERQUOTA:
4460                 str = gettext("Allows accessing any userquota@... property");
4461                 break;
4462         case ZFS_DELEG_NOTE_USERUSED:
4463                 str = gettext("Allows reading any userused@... property");
4464                 break;
4465                 /* other */
4466         default:
4467                 str = "";
4468         }
4469
4470         return (str);
4471 }
4472
4473 struct allow_opts {
4474         boolean_t local;
4475         boolean_t descend;
4476         boolean_t user;
4477         boolean_t group;
4478         boolean_t everyone;
4479         boolean_t create;
4480         boolean_t set;
4481         boolean_t recursive; /* unallow only */
4482         boolean_t prt_usage;
4483
4484         boolean_t prt_perms;
4485         char *who;
4486         char *perms;
4487         const char *dataset;
4488 };
4489
4490 static inline int
4491 prop_cmp(const void *a, const void *b)
4492 {
4493         const char *str1 = *(const char **)a;
4494         const char *str2 = *(const char **)b;
4495         return (strcmp(str1, str2));
4496 }
4497
4498 static void
4499 allow_usage(boolean_t un, boolean_t requested, const char *msg)
4500 {
4501         const char *opt_desc[] = {
4502                 "-h", gettext("show this help message and exit"),
4503                 "-l", gettext("set permission locally"),
4504                 "-d", gettext("set permission for descents"),
4505                 "-u", gettext("set permission for user"),
4506                 "-g", gettext("set permission for group"),
4507                 "-e", gettext("set permission for everyone"),
4508                 "-c", gettext("set create time permission"),
4509                 "-s", gettext("define permission set"),
4510                 /* unallow only */
4511                 "-r", gettext("remove permissions recursively"),
4512         };
4513         size_t unallow_size = sizeof (opt_desc) / sizeof (char *);
4514         size_t allow_size = unallow_size - 2;
4515         const char *props[ZFS_NUM_PROPS];
4516         int i;
4517         size_t count = 0;
4518         FILE *fp = requested ? stdout : stderr;
4519         zprop_desc_t *pdtbl = zfs_prop_get_table();
4520         const char *fmt = gettext("%-16s %-14s\t%s\n");
4521
4522         (void) fprintf(fp, gettext("Usage: %s\n"), get_usage(un ? HELP_UNALLOW :
4523             HELP_ALLOW));
4524         (void) fprintf(fp, gettext("Options:\n"));
4525         for (i = 0; i < (un ? unallow_size : allow_size); i++) {
4526                 const char *opt = opt_desc[i++];
4527                 const char *optdsc = opt_desc[i];
4528                 (void) fprintf(fp, gettext("  %-10s  %s\n"), opt, optdsc);
4529         }
4530
4531         (void) fprintf(fp, gettext("\nThe following permissions are "
4532             "supported:\n\n"));
4533         (void) fprintf(fp, fmt, gettext("NAME"), gettext("TYPE"),
4534             gettext("NOTES"));
4535         for (i = 0; i < ZFS_NUM_DELEG_NOTES; i++) {
4536                 const char *perm_name = zfs_deleg_perm_tbl[i].z_perm;
4537                 zfs_deleg_note_t perm_note = zfs_deleg_perm_tbl[i].z_note;
4538                 const char *perm_type = deleg_perm_type(perm_note);
4539                 const char *perm_comment = deleg_perm_comment(perm_note);
4540                 (void) fprintf(fp, fmt, perm_name, perm_type, perm_comment);
4541         }
4542
4543         for (i = 0; i < ZFS_NUM_PROPS; i++) {
4544                 zprop_desc_t *pd = &pdtbl[i];
4545                 if (pd->pd_visible != B_TRUE)
4546                         continue;
4547
4548                 if (pd->pd_attr == PROP_READONLY)
4549                         continue;
4550
4551                 props[count++] = pd->pd_name;
4552         }
4553         props[count] = NULL;
4554
4555         qsort(props, count, sizeof (char *), prop_cmp);
4556
4557         for (i = 0; i < count; i++)
4558                 (void) fprintf(fp, fmt, props[i], gettext("property"), "");
4559
4560         if (msg != NULL)
4561                 (void) fprintf(fp, gettext("\nzfs: error: %s"), msg);
4562
4563         exit(requested ? 0 : 2);
4564 }
4565
4566 static inline const char *
4567 munge_args(int argc, char **argv, boolean_t un, size_t expected_argc,
4568     char **permsp)
4569 {
4570         if (un && argc == expected_argc - 1)
4571                 *permsp = NULL;
4572         else if (argc == expected_argc)
4573                 *permsp = argv[argc - 2];
4574         else
4575                 allow_usage(un, B_FALSE,
4576                     gettext("wrong number of parameters\n"));
4577
4578         return (argv[argc - 1]);
4579 }
4580
4581 static void
4582 parse_allow_args(int argc, char **argv, boolean_t un, struct allow_opts *opts)
4583 {
4584         int uge_sum = opts->user + opts->group + opts->everyone;
4585         int csuge_sum = opts->create + opts->set + uge_sum;
4586         int ldcsuge_sum = csuge_sum + opts->local + opts->descend;
4587         int all_sum = un ? ldcsuge_sum + opts->recursive : ldcsuge_sum;
4588
4589         if (uge_sum > 1)
4590                 allow_usage(un, B_FALSE,
4591                     gettext("-u, -g, and -e are mutually exclusive\n"));
4592
4593         if (opts->prt_usage)
4594                 if (argc == 0 && all_sum == 0)
4595                         allow_usage(un, B_TRUE, NULL);
4596                 else
4597                         usage(B_FALSE);
4598
4599         if (opts->set) {
4600                 if (csuge_sum > 1)
4601                         allow_usage(un, B_FALSE,
4602                             gettext("invalid options combined with -s\n"));
4603
4604                 opts->dataset = munge_args(argc, argv, un, 3, &opts->perms);
4605                 if (argv[0][0] != '@')
4606                         allow_usage(un, B_FALSE,
4607                             gettext("invalid set name: missing '@' prefix\n"));
4608                 opts->who = argv[0];
4609         } else if (opts->create) {
4610                 if (ldcsuge_sum > 1)
4611                         allow_usage(un, B_FALSE,
4612                             gettext("invalid options combined with -c\n"));
4613                 opts->dataset = munge_args(argc, argv, un, 2, &opts->perms);
4614         } else if (opts->everyone) {
4615                 if (csuge_sum > 1)
4616                         allow_usage(un, B_FALSE,
4617                             gettext("invalid options combined with -e\n"));
4618                 opts->dataset = munge_args(argc, argv, un, 2, &opts->perms);
4619         } else if (uge_sum == 0 && argc > 0 && strcmp(argv[0], "everyone")
4620             == 0) {
4621                 opts->everyone = B_TRUE;
4622                 argc--;
4623                 argv++;
4624                 opts->dataset = munge_args(argc, argv, un, 2, &opts->perms);
4625         } else if (argc == 1 && !un) {
4626                 opts->prt_perms = B_TRUE;
4627                 opts->dataset = argv[argc-1];
4628         } else {
4629                 opts->dataset = munge_args(argc, argv, un, 3, &opts->perms);
4630                 opts->who = argv[0];
4631         }
4632
4633         if (!opts->local && !opts->descend) {
4634                 opts->local = B_TRUE;
4635                 opts->descend = B_TRUE;
4636         }
4637 }
4638
4639 static void
4640 store_allow_perm(zfs_deleg_who_type_t type, boolean_t local, boolean_t descend,
4641     const char *who, char *perms, nvlist_t *top_nvl)
4642 {
4643         int i;
4644         char ld[2] = { '\0', '\0' };
4645         char who_buf[ZFS_MAXNAMELEN+32];
4646         char base_type;
4647         char set_type;
4648         nvlist_t *base_nvl = NULL;
4649         nvlist_t *set_nvl = NULL;
4650         nvlist_t *nvl;
4651
4652         if (nvlist_alloc(&base_nvl, NV_UNIQUE_NAME, 0) != 0)
4653                 nomem();
4654         if (nvlist_alloc(&set_nvl, NV_UNIQUE_NAME, 0) !=  0)
4655                 nomem();
4656
4657         switch (type) {
4658         case ZFS_DELEG_NAMED_SET_SETS:
4659         case ZFS_DELEG_NAMED_SET:
4660                 set_type = ZFS_DELEG_NAMED_SET_SETS;
4661                 base_type = ZFS_DELEG_NAMED_SET;
4662                 ld[0] = ZFS_DELEG_NA;
4663                 break;
4664         case ZFS_DELEG_CREATE_SETS:
4665         case ZFS_DELEG_CREATE:
4666                 set_type = ZFS_DELEG_CREATE_SETS;
4667                 base_type = ZFS_DELEG_CREATE;
4668                 ld[0] = ZFS_DELEG_NA;
4669                 break;
4670         case ZFS_DELEG_USER_SETS:
4671         case ZFS_DELEG_USER:
4672                 set_type = ZFS_DELEG_USER_SETS;
4673                 base_type = ZFS_DELEG_USER;
4674                 if (local)
4675                         ld[0] = ZFS_DELEG_LOCAL;
4676                 if (descend)
4677                         ld[1] = ZFS_DELEG_DESCENDENT;
4678                 break;
4679         case ZFS_DELEG_GROUP_SETS:
4680         case ZFS_DELEG_GROUP:
4681                 set_type = ZFS_DELEG_GROUP_SETS;
4682                 base_type = ZFS_DELEG_GROUP;
4683                 if (local)
4684                         ld[0] = ZFS_DELEG_LOCAL;
4685                 if (descend)
4686                         ld[1] = ZFS_DELEG_DESCENDENT;
4687                 break;
4688         case ZFS_DELEG_EVERYONE_SETS:
4689         case ZFS_DELEG_EVERYONE:
4690                 set_type = ZFS_DELEG_EVERYONE_SETS;
4691                 base_type = ZFS_DELEG_EVERYONE;
4692                 if (local)
4693                         ld[0] = ZFS_DELEG_LOCAL;
4694                 if (descend)
4695                         ld[1] = ZFS_DELEG_DESCENDENT;
4696         }
4697
4698         if (perms != NULL) {
4699                 char *curr = perms;
4700                 char *end = curr + strlen(perms);
4701
4702                 while (curr < end) {
4703                         char *delim = strchr(curr, ',');
4704                         if (delim == NULL)
4705                                 delim = end;
4706                         else
4707                                 *delim = '\0';
4708
4709                         if (curr[0] == '@')
4710                                 nvl = set_nvl;
4711                         else
4712                                 nvl = base_nvl;
4713
4714                         (void) nvlist_add_boolean(nvl, curr);
4715                         if (delim != end)
4716                                 *delim = ',';
4717                         curr = delim + 1;
4718                 }
4719
4720                 for (i = 0; i < 2; i++) {
4721                         char locality = ld[i];
4722                         if (locality == 0)
4723                                 continue;
4724
4725                         if (!nvlist_empty(base_nvl)) {
4726                                 if (who != NULL)
4727                                         (void) snprintf(who_buf,
4728                                             sizeof (who_buf), "%c%c$%s",
4729                                             base_type, locality, who);
4730                                 else
4731                                         (void) snprintf(who_buf,
4732                                             sizeof (who_buf), "%c%c$",
4733                                             base_type, locality);
4734
4735                                 (void) nvlist_add_nvlist(top_nvl, who_buf,
4736                                     base_nvl);
4737                         }
4738
4739
4740                         if (!nvlist_empty(set_nvl)) {
4741                                 if (who != NULL)
4742                                         (void) snprintf(who_buf,
4743                                             sizeof (who_buf), "%c%c$%s",
4744                                             set_type, locality, who);
4745                                 else
4746                                         (void) snprintf(who_buf,
4747                                             sizeof (who_buf), "%c%c$",
4748                                             set_type, locality);
4749
4750                                 (void) nvlist_add_nvlist(top_nvl, who_buf,
4751                                     set_nvl);
4752                         }
4753                 }
4754         } else {
4755                 for (i = 0; i < 2; i++) {
4756                         char locality = ld[i];
4757                         if (locality == 0)
4758                                 continue;
4759
4760                         if (who != NULL)
4761                                 (void) snprintf(who_buf, sizeof (who_buf),
4762                                     "%c%c$%s", base_type, locality, who);
4763                         else
4764                                 (void) snprintf(who_buf, sizeof (who_buf),
4765                                     "%c%c$", base_type, locality);
4766                         (void) nvlist_add_boolean(top_nvl, who_buf);
4767
4768                         if (who != NULL)
4769                                 (void) snprintf(who_buf, sizeof (who_buf),
4770                                     "%c%c$%s", set_type, locality, who);
4771                         else
4772                                 (void) snprintf(who_buf, sizeof (who_buf),
4773                                     "%c%c$", set_type, locality);
4774                         (void) nvlist_add_boolean(top_nvl, who_buf);
4775                 }
4776         }
4777 }
4778
4779 static int
4780 construct_fsacl_list(boolean_t un, struct allow_opts *opts, nvlist_t **nvlp)
4781 {
4782         if (nvlist_alloc(nvlp, NV_UNIQUE_NAME, 0) != 0)
4783                 nomem();
4784
4785         if (opts->set) {
4786                 store_allow_perm(ZFS_DELEG_NAMED_SET, opts->local,
4787                     opts->descend, opts->who, opts->perms, *nvlp);
4788         } else if (opts->create) {
4789                 store_allow_perm(ZFS_DELEG_CREATE, opts->local,
4790                     opts->descend, NULL, opts->perms, *nvlp);
4791         } else if (opts->everyone) {
4792                 store_allow_perm(ZFS_DELEG_EVERYONE, opts->local,
4793                     opts->descend, NULL, opts->perms, *nvlp);
4794         } else {
4795                 char *curr = opts->who;
4796                 char *end = curr + strlen(curr);
4797
4798                 while (curr < end) {
4799                         const char *who;
4800                         zfs_deleg_who_type_t who_type;
4801                         char *endch;
4802                         char *delim = strchr(curr, ',');
4803                         char errbuf[256];
4804                         char id[64];
4805                         struct passwd *p = NULL;
4806                         struct group *g = NULL;
4807
4808                         uid_t rid;
4809                         if (delim == NULL)
4810                                 delim = end;
4811                         else
4812                                 *delim = '\0';
4813
4814                         rid = (uid_t)strtol(curr, &endch, 0);
4815                         if (opts->user) {
4816                                 who_type = ZFS_DELEG_USER;
4817                                 if (*endch != '\0')
4818                                         p = getpwnam(curr);
4819                                 else
4820                                         p = getpwuid(rid);
4821
4822                                 if (p != NULL)
4823                                         rid = p->pw_uid;
4824                                 else {
4825                                         (void) snprintf(errbuf, 256, gettext(
4826                                             "invalid user %s"), curr);
4827                                         allow_usage(un, B_TRUE, errbuf);
4828                                 }
4829                         } else if (opts->group) {
4830                                 who_type = ZFS_DELEG_GROUP;
4831                                 if (*endch != '\0')
4832                                         g = getgrnam(curr);
4833                                 else
4834                                         g = getgrgid(rid);
4835
4836                                 if (g != NULL)
4837                                         rid = g->gr_gid;
4838                                 else {
4839                                         (void) snprintf(errbuf, 256, gettext(
4840                                             "invalid group %s"),  curr);
4841                                         allow_usage(un, B_TRUE, errbuf);
4842                                 }
4843                         } else {
4844                                 if (*endch != '\0') {
4845                                         p = getpwnam(curr);
4846                                 } else {
4847                                         p = getpwuid(rid);
4848                                 }
4849
4850                                 if (p == NULL)
4851                                         if (*endch != '\0') {
4852                                                 g = getgrnam(curr);
4853                                         } else {
4854                                                 g = getgrgid(rid);
4855                                         }
4856
4857                                 if (p != NULL) {
4858                                         who_type = ZFS_DELEG_USER;
4859                                         rid = p->pw_uid;
4860                                 } else if (g != NULL) {
4861                                         who_type = ZFS_DELEG_GROUP;
4862                                         rid = g->gr_gid;
4863                                 } else {
4864                                         (void) snprintf(errbuf, 256, gettext(
4865                                             "invalid user/group %s"), curr);
4866                                         allow_usage(un, B_TRUE, errbuf);
4867                                 }
4868                         }
4869
4870                         (void) sprintf(id, "%u", rid);
4871                         who = id;
4872
4873                         store_allow_perm(who_type, opts->local,
4874                             opts->descend, who, opts->perms, *nvlp);
4875                         curr = delim + 1;
4876                 }
4877         }
4878
4879         return (0);
4880 }
4881
4882 static void
4883 print_set_creat_perms(uu_avl_t *who_avl)
4884 {
4885         const char *sc_title[] = {
4886                 gettext("Permission sets:\n"),
4887                 gettext("Create time permissions:\n"),
4888                 NULL
4889         };
4890         const char **title_ptr = sc_title;
4891         who_perm_node_t *who_node = NULL;
4892         int prev_weight = -1;
4893
4894         for (who_node = uu_avl_first(who_avl); who_node != NULL;
4895             who_node = uu_avl_next(who_avl, who_node)) {
4896                 uu_avl_t *avl = who_node->who_perm.who_deleg_perm_avl;
4897                 zfs_deleg_who_type_t who_type = who_node->who_perm.who_type;
4898                 const char *who_name = who_node->who_perm.who_name;
4899                 int weight = who_type2weight(who_type);
4900                 boolean_t first = B_TRUE;
4901                 deleg_perm_node_t *deleg_node;
4902
4903                 if (prev_weight != weight) {
4904                         (void) printf(*title_ptr++);
4905                         prev_weight = weight;
4906                 }
4907
4908                 if (who_name == NULL || strnlen(who_name, 1) == 0)
4909                         (void) printf("\t");
4910                 else
4911                         (void) printf("\t%s ", who_name);
4912
4913                 for (deleg_node = uu_avl_first(avl); deleg_node != NULL;
4914                     deleg_node = uu_avl_next(avl, deleg_node)) {
4915                         if (first) {
4916                                 (void) printf("%s",
4917                                     deleg_node->dpn_perm.dp_name);
4918                                 first = B_FALSE;
4919                         } else
4920                                 (void) printf(",%s",
4921                                     deleg_node->dpn_perm.dp_name);
4922                 }
4923
4924                 (void) printf("\n");
4925         }
4926 }
4927
4928 static void inline
4929 print_uge_deleg_perms(uu_avl_t *who_avl, boolean_t local, boolean_t descend,
4930     const char *title)
4931 {
4932         who_perm_node_t *who_node = NULL;
4933         boolean_t prt_title = B_TRUE;
4934         uu_avl_walk_t *walk;
4935
4936         if ((walk = uu_avl_walk_start(who_avl, UU_WALK_ROBUST)) == NULL)
4937                 nomem();
4938
4939         while ((who_node = uu_avl_walk_next(walk)) != NULL) {
4940                 const char *who_name = who_node->who_perm.who_name;
4941                 const char *nice_who_name = who_node->who_perm.who_ug_name;
4942                 uu_avl_t *avl = who_node->who_perm.who_deleg_perm_avl;
4943                 zfs_deleg_who_type_t who_type = who_node->who_perm.who_type;
4944                 char delim = ' ';
4945                 deleg_perm_node_t *deleg_node;
4946                 boolean_t prt_who = B_TRUE;
4947
4948                 for (deleg_node = uu_avl_first(avl);
4949                     deleg_node != NULL;
4950                     deleg_node = uu_avl_next(avl, deleg_node)) {
4951                         if (local != deleg_node->dpn_perm.dp_local ||
4952                             descend != deleg_node->dpn_perm.dp_descend)
4953                                 continue;
4954
4955                         if (prt_who) {
4956                                 const char *who = NULL;
4957                                 if (prt_title) {
4958                                         prt_title = B_FALSE;
4959                                         (void) printf(title);
4960                                 }
4961
4962                                 switch (who_type) {
4963                                 case ZFS_DELEG_USER_SETS:
4964                                 case ZFS_DELEG_USER:
4965                                         who = gettext("user");
4966                                         if (nice_who_name)
4967                                                 who_name  = nice_who_name;
4968                                         break;
4969                                 case ZFS_DELEG_GROUP_SETS:
4970                                 case ZFS_DELEG_GROUP:
4971                                         who = gettext("group");
4972                                         if (nice_who_name)
4973                                                 who_name  = nice_who_name;
4974                                         break;
4975                                 case ZFS_DELEG_EVERYONE_SETS:
4976                                 case ZFS_DELEG_EVERYONE:
4977                                         who = gettext("everyone");
4978                                         who_name = NULL;
4979                                 }
4980
4981                                 prt_who = B_FALSE;
4982                                 if (who_name == NULL)
4983                                         (void) printf("\t%s", who);
4984                                 else
4985                                         (void) printf("\t%s %s", who, who_name);
4986                         }
4987
4988                         (void) printf("%c%s", delim,
4989                             deleg_node->dpn_perm.dp_name);
4990                         delim = ',';
4991                 }
4992
4993                 if (!prt_who)
4994                         (void) printf("\n");
4995         }
4996
4997         uu_avl_walk_end(walk);
4998 }
4999
5000 static void
5001 print_fs_perms(fs_perm_set_t *fspset)
5002 {
5003         fs_perm_node_t *node = NULL;
5004         char buf[ZFS_MAXNAMELEN+32];
5005         const char *dsname = buf;
5006
5007         for (node = uu_list_first(fspset->fsps_list); node != NULL;
5008             node = uu_list_next(fspset->fsps_list, node)) {
5009                 uu_avl_t *sc_avl = node->fspn_fsperm.fsp_sc_avl;
5010                 uu_avl_t *uge_avl = node->fspn_fsperm.fsp_uge_avl;
5011                 int left = 0;
5012
5013                 (void) snprintf(buf, ZFS_MAXNAMELEN+32,
5014                     gettext("---- Permissions on %s "),
5015                     node->fspn_fsperm.fsp_name);
5016                 (void) printf(dsname);
5017                 left = 70 - strlen(buf);
5018                 while (left-- > 0)
5019                         (void) printf("-");
5020                 (void) printf("\n");
5021
5022                 print_set_creat_perms(sc_avl);
5023                 print_uge_deleg_perms(uge_avl, B_TRUE, B_FALSE,
5024                     gettext("Local permissions:\n"));
5025                 print_uge_deleg_perms(uge_avl, B_FALSE, B_TRUE,
5026                     gettext("Descendent permissions:\n"));
5027                 print_uge_deleg_perms(uge_avl, B_TRUE, B_TRUE,
5028                     gettext("Local+Descendent permissions:\n"));
5029         }
5030 }
5031
5032 static fs_perm_set_t fs_perm_set = { NULL, NULL, NULL, NULL };
5033
5034 struct deleg_perms {
5035         boolean_t un;
5036         nvlist_t *nvl;
5037 };
5038
5039 static int
5040 set_deleg_perms(zfs_handle_t *zhp, void *data)
5041 {
5042         struct deleg_perms *perms = (struct deleg_perms *)data;
5043         zfs_type_t zfs_type = zfs_get_type(zhp);
5044
5045         if (zfs_type != ZFS_TYPE_FILESYSTEM && zfs_type != ZFS_TYPE_VOLUME)
5046                 return (0);
5047
5048         return (zfs_set_fsacl(zhp, perms->un, perms->nvl));
5049 }
5050
5051 static int
5052 zfs_do_allow_unallow_impl(int argc, char **argv, boolean_t un)
5053 {
5054         zfs_handle_t *zhp;
5055         nvlist_t *perm_nvl = NULL;
5056         nvlist_t *update_perm_nvl = NULL;
5057         int error = 1;
5058         int c;
5059         struct allow_opts opts = { 0 };
5060
5061         const char *optstr = un ? "ldugecsrh" : "ldugecsh";
5062
5063         /* check opts */
5064         while ((c = getopt(argc, argv, optstr)) != -1) {
5065                 switch (c) {
5066                 case 'l':
5067                         opts.local = B_TRUE;
5068                         break;
5069                 case 'd':
5070                         opts.descend = B_TRUE;
5071                         break;
5072                 case 'u':
5073                         opts.user = B_TRUE;
5074                         break;
5075                 case 'g':
5076                         opts.group = B_TRUE;
5077                         break;
5078                 case 'e':
5079                         opts.everyone = B_TRUE;
5080                         break;
5081                 case 's':
5082                         opts.set = B_TRUE;
5083                         break;
5084                 case 'c':
5085                         opts.create = B_TRUE;
5086                         break;
5087                 case 'r':
5088                         opts.recursive = B_TRUE;
5089                         break;
5090                 case ':':
5091                         (void) fprintf(stderr, gettext("missing argument for "
5092                             "'%c' option\n"), optopt);
5093                         usage(B_FALSE);
5094                         break;
5095                 case 'h':
5096                         opts.prt_usage = B_TRUE;
5097                         break;
5098                 case '?':
5099                         (void) fprintf(stderr, gettext("invalid option '%c'\n"),
5100                             optopt);
5101                         usage(B_FALSE);
5102                 }
5103         }
5104
5105         argc -= optind;
5106         argv += optind;
5107
5108         /* check arguments */
5109         parse_allow_args(argc, argv, un, &opts);
5110
5111         /* try to open the dataset */
5112         if ((zhp = zfs_open(g_zfs, opts.dataset, ZFS_TYPE_FILESYSTEM |
5113             ZFS_TYPE_VOLUME)) == NULL) {
5114                 (void) fprintf(stderr, "Failed to open dataset: %s\n",
5115                     opts.dataset);
5116                 return (-1);
5117         }
5118
5119         if (zfs_get_fsacl(zhp, &perm_nvl) != 0)
5120                 goto cleanup2;
5121
5122         fs_perm_set_init(&fs_perm_set);
5123         if (parse_fs_perm_set(&fs_perm_set, perm_nvl) != 0) {
5124                 (void) fprintf(stderr, "Failed to parse fsacl permissions\n");
5125                 goto cleanup1;
5126         }
5127
5128         if (opts.prt_perms)
5129                 print_fs_perms(&fs_perm_set);
5130         else {
5131                 (void) construct_fsacl_list(un, &opts, &update_perm_nvl);
5132                 if (zfs_set_fsacl(zhp, un, update_perm_nvl) != 0)
5133                         goto cleanup0;
5134
5135                 if (un && opts.recursive) {
5136                         struct deleg_perms data = { un, update_perm_nvl };
5137                         if (zfs_iter_filesystems(zhp, set_deleg_perms,
5138                             &data) != 0)
5139                                 goto cleanup0;
5140                 }
5141         }
5142
5143         error = 0;
5144
5145 cleanup0:
5146         nvlist_free(perm_nvl);
5147         if (update_perm_nvl != NULL)
5148                 nvlist_free(update_perm_nvl);
5149 cleanup1:
5150         fs_perm_set_fini(&fs_perm_set);
5151 cleanup2:
5152         zfs_close(zhp);
5153
5154         return (error);
5155 }
5156
5157 static int
5158 zfs_do_allow(int argc, char **argv)
5159 {
5160         return (zfs_do_allow_unallow_impl(argc, argv, B_FALSE));
5161 }
5162
5163 static int
5164 zfs_do_unallow(int argc, char **argv)
5165 {
5166         return (zfs_do_allow_unallow_impl(argc, argv, B_TRUE));
5167 }
5168
5169 static int
5170 zfs_do_hold_rele_impl(int argc, char **argv, boolean_t holding)
5171 {
5172         int errors = 0;
5173         int i;
5174         const char *tag;
5175         boolean_t recursive = B_FALSE;
5176         const char *opts = holding ? "rt" : "r";
5177         int c;
5178
5179         /* check options */
5180         while ((c = getopt(argc, argv, opts)) != -1) {
5181                 switch (c) {
5182                 case 'r':
5183                         recursive = B_TRUE;
5184                         break;
5185                 case '?':
5186                         (void) fprintf(stderr, gettext("invalid option '%c'\n"),
5187                             optopt);
5188                         usage(B_FALSE);
5189                 }
5190         }
5191
5192         argc -= optind;
5193         argv += optind;
5194
5195         /* check number of arguments */
5196         if (argc < 2)
5197                 usage(B_FALSE);
5198
5199         tag = argv[0];
5200         --argc;
5201         ++argv;
5202
5203         if (holding && tag[0] == '.') {
5204                 /* tags starting with '.' are reserved for libzfs */
5205                 (void) fprintf(stderr, gettext("tag may not start with '.'\n"));
5206                 usage(B_FALSE);
5207         }
5208
5209         for (i = 0; i < argc; ++i) {
5210                 zfs_handle_t *zhp;
5211                 char parent[ZFS_MAXNAMELEN];
5212                 const char *delim;
5213                 char *path = argv[i];
5214
5215                 delim = strchr(path, '@');
5216                 if (delim == NULL) {
5217                         (void) fprintf(stderr,
5218                             gettext("'%s' is not a snapshot\n"), path);
5219                         ++errors;
5220                         continue;
5221                 }
5222                 (void) strncpy(parent, path, delim - path);
5223                 parent[delim - path] = '\0';
5224
5225                 zhp = zfs_open(g_zfs, parent,
5226                     ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME);
5227                 if (zhp == NULL) {
5228                         ++errors;
5229                         continue;
5230                 }
5231                 if (holding) {
5232                         if (zfs_hold(zhp, delim+1, tag, recursive, -1) != 0)
5233                                 ++errors;
5234                 } else {
5235                         if (zfs_release(zhp, delim+1, tag, recursive) != 0)
5236                                 ++errors;
5237                 }
5238                 zfs_close(zhp);
5239         }
5240
5241         return (errors != 0);
5242 }
5243
5244 /*
5245  * zfs hold [-r] [-t] <tag> <snap> ...
5246  *
5247  *      -r      Recursively hold
5248  *
5249  * Apply a user-hold with the given tag to the list of snapshots.
5250  */
5251 static int
5252 zfs_do_hold(int argc, char **argv)
5253 {
5254         return (zfs_do_hold_rele_impl(argc, argv, B_TRUE));
5255 }
5256
5257 /*
5258  * zfs release [-r] <tag> <snap> ...
5259  *
5260  *      -r      Recursively release
5261  *
5262  * Release a user-hold with the given tag from the list of snapshots.
5263  */
5264 static int
5265 zfs_do_release(int argc, char **argv)
5266 {
5267         return (zfs_do_hold_rele_impl(argc, argv, B_FALSE));
5268 }
5269
5270 typedef struct holds_cbdata {
5271         boolean_t       cb_recursive;
5272         const char      *cb_snapname;
5273         nvlist_t        **cb_nvlp;
5274         size_t          cb_max_namelen;
5275         size_t          cb_max_taglen;
5276 } holds_cbdata_t;
5277
5278 #define STRFTIME_FMT_STR "%a %b %e %k:%M %Y"
5279 #define DATETIME_BUF_LEN (32)
5280 /*
5281  *
5282  */
5283 static void
5284 print_holds(boolean_t scripted, size_t nwidth, size_t tagwidth, nvlist_t *nvl)
5285 {
5286         int i;
5287         nvpair_t *nvp = NULL;
5288         char *hdr_cols[] = { "NAME", "TAG", "TIMESTAMP" };
5289         const char *col;
5290
5291         if (!scripted) {
5292                 for (i = 0; i < 3; i++) {
5293                         col = gettext(hdr_cols[i]);
5294                         if (i < 2)
5295                                 (void) printf("%-*s  ", i ? tagwidth : nwidth,
5296                                     col);
5297                         else
5298                                 (void) printf("%s\n", col);
5299                 }
5300         }
5301
5302         while ((nvp = nvlist_next_nvpair(nvl, nvp)) != NULL) {
5303                 char *zname = nvpair_name(nvp);
5304                 nvlist_t *nvl2;
5305                 nvpair_t *nvp2 = NULL;
5306                 (void) nvpair_value_nvlist(nvp, &nvl2);
5307                 while ((nvp2 = nvlist_next_nvpair(nvl2, nvp2)) != NULL) {
5308                         char tsbuf[DATETIME_BUF_LEN];
5309                         char *tagname = nvpair_name(nvp2);
5310                         uint64_t val = 0;
5311                         time_t time;
5312                         struct tm t;
5313                         char sep = scripted ? '\t' : ' ';
5314                         size_t sepnum = scripted ? 1 : 2;
5315
5316                         (void) nvpair_value_uint64(nvp2, &val);
5317                         time = (time_t)val;
5318                         (void) localtime_r(&time, &t);
5319                         (void) strftime(tsbuf, DATETIME_BUF_LEN,
5320                             gettext(STRFTIME_FMT_STR), &t);
5321
5322                         (void) printf("%-*s%*c%-*s%*c%s\n", nwidth, zname,
5323                             sepnum, sep, tagwidth, tagname, sepnum, sep, tsbuf);
5324                 }
5325         }
5326 }
5327
5328 /*
5329  * Generic callback function to list a dataset or snapshot.
5330  */
5331 static int
5332 holds_callback(zfs_handle_t *zhp, void *data)
5333 {
5334         holds_cbdata_t *cbp = data;
5335         nvlist_t *top_nvl = *cbp->cb_nvlp;
5336         nvlist_t *nvl = NULL;
5337         nvpair_t *nvp = NULL;
5338         const char *zname = zfs_get_name(zhp);
5339         size_t znamelen = strnlen(zname, ZFS_MAXNAMELEN);
5340
5341         if (cbp->cb_recursive) {
5342                 const char *snapname;
5343                 char *delim  = strchr(zname, '@');
5344                 if (delim == NULL)
5345                         return (0);
5346
5347                 snapname = delim + 1;
5348                 if (strcmp(cbp->cb_snapname, snapname))
5349                         return (0);
5350         }
5351
5352         if (zfs_get_holds(zhp, &nvl) != 0)
5353                 return (-1);
5354
5355         if (znamelen > cbp->cb_max_namelen)
5356                 cbp->cb_max_namelen  = znamelen;
5357
5358         while ((nvp = nvlist_next_nvpair(nvl, nvp)) != NULL) {
5359                 const char *tag = nvpair_name(nvp);
5360                 size_t taglen = strnlen(tag, MAXNAMELEN);
5361                 if (taglen > cbp->cb_max_taglen)
5362                         cbp->cb_max_taglen  = taglen;
5363         }
5364
5365         return (nvlist_add_nvlist(top_nvl, zname, nvl));
5366 }
5367
5368 /*
5369  * zfs holds [-r] <snap> ...
5370  *
5371  *      -r      Recursively hold
5372  */
5373 static int
5374 zfs_do_holds(int argc, char **argv)
5375 {
5376         int errors = 0;
5377         int c;
5378         int i;
5379         boolean_t scripted = B_FALSE;
5380         boolean_t recursive = B_FALSE;
5381         const char *opts = "rH";
5382         nvlist_t *nvl;
5383
5384         int types = ZFS_TYPE_SNAPSHOT;
5385         holds_cbdata_t cb = { 0 };
5386
5387         int limit = 0;
5388         int ret = 0;
5389         int flags = 0;
5390
5391         /* check options */
5392         while ((c = getopt(argc, argv, opts)) != -1) {
5393                 switch (c) {
5394                 case 'r':
5395                         recursive = B_TRUE;
5396                         break;
5397                 case 'H':
5398                         scripted = B_TRUE;
5399                         break;
5400                 case '?':
5401                         (void) fprintf(stderr, gettext("invalid option '%c'\n"),
5402                             optopt);
5403                         usage(B_FALSE);
5404                 }
5405         }
5406
5407         if (recursive) {
5408                 types |= ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME;
5409                 flags |= ZFS_ITER_RECURSE;
5410         }
5411
5412         argc -= optind;
5413         argv += optind;
5414
5415         /* check number of arguments */
5416         if (argc < 1)
5417                 usage(B_FALSE);
5418
5419         if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0) != 0)
5420                 nomem();
5421
5422         for (i = 0; i < argc; ++i) {
5423                 char *snapshot = argv[i];
5424                 const char *delim;
5425                 const char *snapname;
5426
5427                 delim = strchr(snapshot, '@');
5428                 if (delim == NULL) {
5429                         (void) fprintf(stderr,
5430                             gettext("'%s' is not a snapshot\n"), snapshot);
5431                         ++errors;
5432                         continue;
5433                 }
5434                 snapname = delim + 1;
5435                 if (recursive)
5436                         snapshot[delim - snapshot] = '\0';
5437
5438                 cb.cb_recursive = recursive;
5439                 cb.cb_snapname = snapname;
5440                 cb.cb_nvlp = &nvl;
5441
5442                 /*
5443                  *  1. collect holds data, set format options
5444                  */
5445                 ret = zfs_for_each(argc, argv, flags, types, NULL, NULL, limit,
5446                     holds_callback, &cb);
5447                 if (ret != 0)
5448                         ++errors;
5449         }
5450
5451         /*
5452          *  2. print holds data
5453          */
5454         print_holds(scripted, cb.cb_max_namelen, cb.cb_max_taglen, nvl);
5455
5456         if (nvlist_empty(nvl))
5457                 (void) printf(gettext("no datasets available\n"));
5458
5459         nvlist_free(nvl);
5460
5461         return (0 != errors);
5462 }
5463
5464 #define CHECK_SPINNER 30
5465 #define SPINNER_TIME 3          /* seconds */
5466 #define MOUNT_TIME 5            /* seconds */
5467
5468 static int
5469 get_one_dataset(zfs_handle_t *zhp, void *data)
5470 {
5471         static char *spin[] = { "-", "\\", "|", "/" };
5472         static int spinval = 0;
5473         static int spincheck = 0;
5474         static time_t last_spin_time = (time_t)0;
5475         get_all_cb_t *cbp = data;
5476         zfs_type_t type = zfs_get_type(zhp);
5477
5478         if (cbp->cb_verbose) {
5479                 if (--spincheck < 0) {
5480                         time_t now = time(NULL);
5481                         if (last_spin_time + SPINNER_TIME < now) {
5482                                 update_progress(spin[spinval++ % 4]);
5483                                 last_spin_time = now;
5484                         }
5485                         spincheck = CHECK_SPINNER;
5486                 }
5487         }
5488
5489         /*
5490          * Interate over any nested datasets.
5491          */
5492         if (zfs_iter_filesystems(zhp, get_one_dataset, data) != 0) {
5493                 zfs_close(zhp);
5494                 return (1);
5495         }
5496
5497         /*
5498          * Skip any datasets whose type does not match.
5499          */
5500         if ((type & ZFS_TYPE_FILESYSTEM) == 0) {
5501                 zfs_close(zhp);
5502                 return (0);
5503         }
5504         libzfs_add_handle(cbp, zhp);
5505         assert(cbp->cb_used <= cbp->cb_alloc);
5506
5507         return (0);
5508 }
5509
5510 static void
5511 get_all_datasets(zfs_handle_t ***dslist, size_t *count, boolean_t verbose)
5512 {
5513         get_all_cb_t cb = { 0 };
5514         cb.cb_verbose = verbose;
5515         cb.cb_getone = get_one_dataset;
5516
5517         if (verbose)
5518                 set_progress_header(gettext("Reading ZFS config"));
5519         (void) zfs_iter_root(g_zfs, get_one_dataset, &cb);
5520
5521         *dslist = cb.cb_handles;
5522         *count = cb.cb_used;
5523
5524         if (verbose)
5525                 finish_progress(gettext("done."));
5526 }
5527
5528 /*
5529  * Generic callback for sharing or mounting filesystems.  Because the code is so
5530  * similar, we have a common function with an extra parameter to determine which
5531  * mode we are using.
5532  */
5533 #define OP_SHARE        0x1
5534 #define OP_MOUNT        0x2
5535
5536 /*
5537  * Share or mount a dataset.
5538  */
5539 static int
5540 share_mount_one(zfs_handle_t *zhp, int op, int flags, char *protocol,
5541     boolean_t explicit, const char *options)
5542 {
5543         char mountpoint[ZFS_MAXPROPLEN];
5544         char shareopts[ZFS_MAXPROPLEN];
5545         char smbshareopts[ZFS_MAXPROPLEN];
5546         const char *cmdname = op == OP_SHARE ? "share" : "mount";
5547         struct mnttab mnt;
5548         uint64_t zoned, canmount;
5549         boolean_t shared_nfs, shared_smb;
5550
5551         assert(zfs_get_type(zhp) & ZFS_TYPE_FILESYSTEM);
5552
5553         /*
5554          * Check to make sure we can mount/share this dataset.  If we
5555          * are in the global zone and the filesystem is exported to a
5556          * local zone, or if we are in a local zone and the
5557          * filesystem is not exported, then it is an error.
5558          */
5559         zoned = zfs_prop_get_int(zhp, ZFS_PROP_ZONED);
5560
5561         if (zoned && getzoneid() == GLOBAL_ZONEID) {
5562                 if (!explicit)
5563                         return (0);
5564
5565                 (void) fprintf(stderr, gettext("cannot %s '%s': "
5566                     "dataset is exported to a local zone\n"), cmdname,
5567                     zfs_get_name(zhp));
5568                 return (1);
5569
5570         } else if (!zoned && getzoneid() != GLOBAL_ZONEID) {
5571                 if (!explicit)
5572                         return (0);
5573
5574                 (void) fprintf(stderr, gettext("cannot %s '%s': "
5575                     "permission denied\n"), cmdname,
5576                     zfs_get_name(zhp));
5577                 return (1);
5578         }
5579
5580         /*
5581          * Ignore any filesystems which don't apply to us. This
5582          * includes those with a legacy mountpoint, or those with
5583          * legacy share options.
5584          */
5585         verify(zfs_prop_get(zhp, ZFS_PROP_MOUNTPOINT, mountpoint,
5586             sizeof (mountpoint), NULL, NULL, 0, B_FALSE) == 0);
5587         verify(zfs_prop_get(zhp, ZFS_PROP_SHARENFS, shareopts,
5588             sizeof (shareopts), NULL, NULL, 0, B_FALSE) == 0);
5589         verify(zfs_prop_get(zhp, ZFS_PROP_SHARESMB, smbshareopts,
5590             sizeof (smbshareopts), NULL, NULL, 0, B_FALSE) == 0);
5591
5592         if (op == OP_SHARE && strcmp(shareopts, "off") == 0 &&
5593             strcmp(smbshareopts, "off") == 0) {
5594                 if (!explicit)
5595                         return (0);
5596
5597                 (void) fprintf(stderr, gettext("cannot share '%s': "
5598                     "legacy share\n"), zfs_get_name(zhp));
5599                 (void) fprintf(stderr, gettext("to "
5600                     "share this filesystem set "
5601                     "sharenfs property on\n"));
5602                 return (1);
5603         }
5604
5605         /*
5606          * We cannot share or mount legacy filesystems. If the
5607          * shareopts is non-legacy but the mountpoint is legacy, we
5608          * treat it as a legacy share.
5609          */
5610         if (strcmp(mountpoint, "legacy") == 0) {
5611                 if (!explicit)
5612                         return (0);
5613
5614                 (void) fprintf(stderr, gettext("cannot %s '%s': "
5615                     "legacy mountpoint\n"), cmdname, zfs_get_name(zhp));
5616                 (void) fprintf(stderr, gettext("use %s(8) to "
5617                     "%s this filesystem\n"), cmdname, cmdname);
5618                 return (1);
5619         }
5620
5621         if (strcmp(mountpoint, "none") == 0) {
5622                 if (!explicit)
5623                         return (0);
5624
5625                 (void) fprintf(stderr, gettext("cannot %s '%s': no "
5626                     "mountpoint set\n"), cmdname, zfs_get_name(zhp));
5627                 return (1);
5628         }
5629
5630         /*
5631          * canmount     explicit        outcome
5632          * on           no              pass through
5633          * on           yes             pass through
5634          * off          no              return 0
5635          * off          yes             display error, return 1
5636          * noauto       no              return 0
5637          * noauto       yes             pass through
5638          */
5639         canmount = zfs_prop_get_int(zhp, ZFS_PROP_CANMOUNT);
5640         if (canmount == ZFS_CANMOUNT_OFF) {
5641                 if (!explicit)
5642                         return (0);
5643
5644                 (void) fprintf(stderr, gettext("cannot %s '%s': "
5645                     "'canmount' property is set to 'off'\n"), cmdname,
5646                     zfs_get_name(zhp));
5647                 return (1);
5648         } else if (canmount == ZFS_CANMOUNT_NOAUTO && !explicit) {
5649                 return (0);
5650         }
5651
5652         /*
5653          * At this point, we have verified that the mountpoint and/or
5654          * shareopts are appropriate for auto management. If the
5655          * filesystem is already mounted or shared, return (failing
5656          * for explicit requests); otherwise mount or share the
5657          * filesystem.
5658          */
5659         switch (op) {
5660         case OP_SHARE:
5661
5662                 shared_nfs = zfs_is_shared_nfs(zhp, NULL);
5663                 shared_smb = zfs_is_shared_smb(zhp, NULL);
5664
5665                 if (shared_nfs && shared_smb ||
5666                     (shared_nfs && strcmp(shareopts, "on") == 0 &&
5667                     strcmp(smbshareopts, "off") == 0) ||
5668                     (shared_smb && strcmp(smbshareopts, "on") == 0 &&
5669                     strcmp(shareopts, "off") == 0)) {
5670                         if (!explicit)
5671                                 return (0);
5672
5673                         (void) fprintf(stderr, gettext("cannot share "
5674                             "'%s': filesystem already shared\n"),
5675                             zfs_get_name(zhp));
5676                         return (1);
5677                 }
5678
5679                 if (!zfs_is_mounted(zhp, NULL) &&
5680                     zfs_mount(zhp, NULL, 0) != 0)
5681                         return (1);
5682
5683                 if (protocol == NULL) {
5684                         if (zfs_shareall(zhp) != 0)
5685                                 return (1);
5686                 } else if (strcmp(protocol, "nfs") == 0) {
5687                         if (zfs_share_nfs(zhp))
5688                                 return (1);
5689                 } else if (strcmp(protocol, "smb") == 0) {
5690                         if (zfs_share_smb(zhp))
5691                                 return (1);
5692                 } else {
5693                         (void) fprintf(stderr, gettext("cannot share "
5694                             "'%s': invalid share type '%s' "
5695                             "specified\n"),
5696                             zfs_get_name(zhp), protocol);
5697                         return (1);
5698                 }
5699
5700                 break;
5701
5702         case OP_MOUNT:
5703                 if (options == NULL)
5704                         mnt.mnt_mntopts = "";
5705                 else
5706                         mnt.mnt_mntopts = (char *)options;
5707
5708                 if (!hasmntopt(&mnt, MNTOPT_REMOUNT) &&
5709                     zfs_is_mounted(zhp, NULL)) {
5710                         if (!explicit)
5711                                 return (0);
5712
5713                         (void) fprintf(stderr, gettext("cannot mount "
5714                             "'%s': filesystem already mounted\n"),
5715                             zfs_get_name(zhp));
5716                         return (1);
5717                 }
5718
5719                 if (zfs_mount(zhp, options, flags) != 0)
5720                         return (1);
5721                 break;
5722         }
5723
5724         return (0);
5725 }
5726
5727 /*
5728  * Reports progress in the form "(current/total)".  Not thread-safe.
5729  */
5730 static void
5731 report_mount_progress(int current, int total)
5732 {
5733         static time_t last_progress_time = 0;
5734         time_t now = time(NULL);
5735         char info[32];
5736
5737         /* report 1..n instead of 0..n-1 */
5738         ++current;
5739
5740         /* display header if we're here for the first time */
5741         if (current == 1) {
5742                 set_progress_header(gettext("Mounting ZFS filesystems"));
5743         } else if (current != total && last_progress_time + MOUNT_TIME >= now) {
5744                 /* too soon to report again */
5745                 return;
5746         }
5747
5748         last_progress_time = now;
5749
5750         (void) sprintf(info, "(%d/%d)", current, total);
5751
5752         if (current == total)
5753                 finish_progress(info);
5754         else
5755                 update_progress(info);
5756 }
5757
5758 static void
5759 append_options(char *mntopts, char *newopts)
5760 {
5761         int len = strlen(mntopts);
5762
5763         /* original length plus new string to append plus 1 for the comma */
5764         if (len + 1 + strlen(newopts) >= MNT_LINE_MAX) {
5765                 (void) fprintf(stderr, gettext("the opts argument for "
5766                     "'%c' option is too long (more than %d chars)\n"),
5767                     "-o", MNT_LINE_MAX);
5768                 usage(B_FALSE);
5769         }
5770
5771         if (*mntopts)
5772                 mntopts[len++] = ',';
5773
5774         (void) strcpy(&mntopts[len], newopts);
5775 }
5776
5777 static int
5778 share_mount(int op, int argc, char **argv)
5779 {
5780         int do_all = 0;
5781         boolean_t verbose = B_FALSE;
5782         int c, ret = 0;
5783         char *options = NULL;
5784         int flags = 0;
5785
5786         /* check options */
5787         while ((c = getopt(argc, argv, op == OP_MOUNT ? ":avo:O" : "a"))
5788             != -1) {
5789                 switch (c) {
5790                 case 'a':
5791                         do_all = 1;
5792                         break;
5793                 case 'v':
5794                         verbose = B_TRUE;
5795                         break;
5796                 case 'o':
5797                         if (*optarg == '\0') {
5798                                 (void) fprintf(stderr, gettext("empty mount "
5799                                     "options (-o) specified\n"));
5800                                 usage(B_FALSE);
5801                         }
5802
5803                         if (options == NULL)
5804                                 options = safe_malloc(MNT_LINE_MAX + 1);
5805
5806                         /* option validation is done later */
5807                         append_options(options, optarg);
5808                         break;
5809
5810                 case 'O':
5811                         warnx("no overlay mounts support on FreeBSD, ignoring");
5812                         break;
5813                 case ':':
5814                         (void) fprintf(stderr, gettext("missing argument for "
5815                             "'%c' option\n"), optopt);
5816                         usage(B_FALSE);
5817                         break;
5818                 case '?':
5819                         (void) fprintf(stderr, gettext("invalid option '%c'\n"),
5820                             optopt);
5821                         usage(B_FALSE);
5822                 }
5823         }
5824
5825         argc -= optind;
5826         argv += optind;
5827
5828         /* check number of arguments */
5829         if (do_all) {
5830                 zfs_handle_t **dslist = NULL;
5831                 size_t i, count = 0;
5832                 char *protocol = NULL;
5833
5834                 if (op == OP_SHARE && argc > 0) {
5835                         if (strcmp(argv[0], "nfs") != 0 &&
5836                             strcmp(argv[0], "smb") != 0) {
5837                                 (void) fprintf(stderr, gettext("share type "
5838                                     "must be 'nfs' or 'smb'\n"));
5839                                 usage(B_FALSE);
5840                         }
5841                         protocol = argv[0];
5842                         argc--;
5843                         argv++;
5844                 }
5845
5846                 if (argc != 0) {
5847                         (void) fprintf(stderr, gettext("too many arguments\n"));
5848                         usage(B_FALSE);
5849                 }
5850
5851                 start_progress_timer();
5852                 get_all_datasets(&dslist, &count, verbose);
5853
5854                 if (count == 0)
5855                         return (0);
5856
5857                 qsort(dslist, count, sizeof (void *), libzfs_dataset_cmp);
5858
5859                 for (i = 0; i < count; i++) {
5860                         if (verbose)
5861                                 report_mount_progress(i, count);
5862
5863                         if (share_mount_one(dslist[i], op, flags, protocol,
5864                             B_FALSE, options) != 0)
5865                                 ret = 1;
5866                         zfs_close(dslist[i]);
5867                 }
5868
5869                 free(dslist);
5870         } else if (argc == 0) {
5871                 struct mnttab entry;
5872
5873                 if ((op == OP_SHARE) || (options != NULL)) {
5874                         (void) fprintf(stderr, gettext("missing filesystem "
5875                             "argument (specify -a for all)\n"));
5876                         usage(B_FALSE);
5877                 }
5878
5879                 /*
5880                  * When mount is given no arguments, go through /etc/mnttab and
5881                  * display any active ZFS mounts.  We hide any snapshots, since
5882                  * they are controlled automatically.
5883                  */
5884                 rewind(mnttab_file);
5885                 while (getmntent(mnttab_file, &entry) == 0) {
5886                         if (strcmp(entry.mnt_fstype, MNTTYPE_ZFS) != 0 ||
5887                             strchr(entry.mnt_special, '@') != NULL)
5888                                 continue;
5889
5890                         (void) printf("%-30s  %s\n", entry.mnt_special,
5891                             entry.mnt_mountp);
5892                 }
5893
5894         } else {
5895                 zfs_handle_t *zhp;
5896
5897                 if (argc > 1) {
5898                         (void) fprintf(stderr,
5899                             gettext("too many arguments\n"));
5900                         usage(B_FALSE);
5901                 }
5902
5903                 if ((zhp = zfs_open(g_zfs, argv[0],
5904                     ZFS_TYPE_FILESYSTEM)) == NULL) {
5905                         ret = 1;
5906                 } else {
5907                         ret = share_mount_one(zhp, op, flags, NULL, B_TRUE,
5908                             options);
5909                         zfs_close(zhp);
5910                 }
5911         }
5912
5913         return (ret);
5914 }
5915
5916 /*
5917  * zfs mount -a [nfs]
5918  * zfs mount filesystem
5919  *
5920  * Mount all filesystems, or mount the given filesystem.
5921  */
5922 static int
5923 zfs_do_mount(int argc, char **argv)
5924 {
5925         return (share_mount(OP_MOUNT, argc, argv));
5926 }
5927
5928 /*
5929  * zfs share -a [nfs | smb]
5930  * zfs share filesystem
5931  *
5932  * Share all filesystems, or share the given filesystem.
5933  */
5934 static int
5935 zfs_do_share(int argc, char **argv)
5936 {
5937         return (share_mount(OP_SHARE, argc, argv));
5938 }
5939
5940 typedef struct unshare_unmount_node {
5941         zfs_handle_t    *un_zhp;
5942         char            *un_mountp;
5943         uu_avl_node_t   un_avlnode;
5944 } unshare_unmount_node_t;
5945
5946 /* ARGSUSED */
5947 static int
5948 unshare_unmount_compare(const void *larg, const void *rarg, void *unused)
5949 {
5950         const unshare_unmount_node_t *l = larg;
5951         const unshare_unmount_node_t *r = rarg;
5952
5953         return (strcmp(l->un_mountp, r->un_mountp));
5954 }
5955
5956 /*
5957  * Convenience routine used by zfs_do_umount() and manual_unmount().  Given an
5958  * absolute path, find the entry /etc/mnttab, verify that its a ZFS filesystem,
5959  * and unmount it appropriately.
5960  */
5961 static int
5962 unshare_unmount_path(int op, char *path, int flags, boolean_t is_manual)
5963 {
5964         zfs_handle_t *zhp;
5965         int ret = 0;
5966         struct stat64 statbuf;
5967         struct extmnttab entry;
5968         const char *cmdname = (op == OP_SHARE) ? "unshare" : "unmount";
5969         ino_t path_inode;
5970
5971         /*
5972          * Search for the path in /etc/mnttab.  Rather than looking for the
5973          * specific path, which can be fooled by non-standard paths (i.e. ".."
5974          * or "//"), we stat() the path and search for the corresponding
5975          * (major,minor) device pair.
5976          */
5977         if (stat64(path, &statbuf) != 0) {
5978                 (void) fprintf(stderr, gettext("cannot %s '%s': %s\n"),
5979                     cmdname, path, strerror(errno));
5980                 return (1);
5981         }
5982         path_inode = statbuf.st_ino;
5983
5984         /*
5985          * Search for the given (major,minor) pair in the mount table.
5986          */
5987 #ifdef sun
5988         rewind(mnttab_file);
5989         while ((ret = getextmntent(mnttab_file, &entry, 0)) == 0) {
5990                 if (entry.mnt_major == major(statbuf.st_dev) &&
5991                     entry.mnt_minor == minor(statbuf.st_dev))
5992                         break;
5993         }
5994 #else
5995         {
5996                 struct statfs sfs;
5997
5998                 if (statfs(path, &sfs) != 0) {
5999                         (void) fprintf(stderr, "%s: %s\n", path,
6000                             strerror(errno));
6001                         ret = -1;
6002                 }
6003                 statfs2mnttab(&sfs, &entry);
6004         }
6005 #endif
6006         if (ret != 0) {
6007                 if (op == OP_SHARE) {
6008                         (void) fprintf(stderr, gettext("cannot %s '%s': not "
6009                             "currently mounted\n"), cmdname, path);
6010                         return (1);
6011                 }
6012                 (void) fprintf(stderr, gettext("warning: %s not in mnttab\n"),
6013                     path);
6014                 if ((ret = umount2(path, flags)) != 0)
6015                         (void) fprintf(stderr, gettext("%s: %s\n"), path,
6016                             strerror(errno));
6017                 return (ret != 0);
6018         }
6019
6020         if (strcmp(entry.mnt_fstype, MNTTYPE_ZFS) != 0) {
6021                 (void) fprintf(stderr, gettext("cannot %s '%s': not a ZFS "
6022                     "filesystem\n"), cmdname, path);
6023                 return (1);
6024         }
6025
6026         if ((zhp = zfs_open(g_zfs, entry.mnt_special,
6027             ZFS_TYPE_FILESYSTEM)) == NULL)
6028                 return (1);
6029
6030         ret = 1;
6031         if (stat64(entry.mnt_mountp, &statbuf) != 0) {
6032                 (void) fprintf(stderr, gettext("cannot %s '%s': %s\n"),
6033                     cmdname, path, strerror(errno));
6034                 goto out;
6035         } else if (statbuf.st_ino != path_inode) {
6036                 (void) fprintf(stderr, gettext("cannot "
6037                     "%s '%s': not a mountpoint\n"), cmdname, path);
6038                 goto out;
6039         }
6040
6041         if (op == OP_SHARE) {
6042                 char nfs_mnt_prop[ZFS_MAXPROPLEN];
6043                 char smbshare_prop[ZFS_MAXPROPLEN];
6044
6045                 verify(zfs_prop_get(zhp, ZFS_PROP_SHARENFS, nfs_mnt_prop,
6046                     sizeof (nfs_mnt_prop), NULL, NULL, 0, B_FALSE) == 0);
6047                 verify(zfs_prop_get(zhp, ZFS_PROP_SHARESMB, smbshare_prop,
6048                     sizeof (smbshare_prop), NULL, NULL, 0, B_FALSE) == 0);
6049
6050                 if (strcmp(nfs_mnt_prop, "off") == 0 &&
6051                     strcmp(smbshare_prop, "off") == 0) {
6052                         (void) fprintf(stderr, gettext("cannot unshare "
6053                             "'%s': legacy share\n"), path);
6054 #ifdef illumos
6055                         (void) fprintf(stderr, gettext("use "
6056                             "unshare(1M) to unshare this filesystem\n"));
6057 #endif
6058                 } else if (!zfs_is_shared(zhp)) {
6059                         (void) fprintf(stderr, gettext("cannot unshare '%s': "
6060                             "not currently shared\n"), path);
6061                 } else {
6062                         ret = zfs_unshareall_bypath(zhp, path);
6063                 }
6064         } else {
6065                 char mtpt_prop[ZFS_MAXPROPLEN];
6066
6067                 verify(zfs_prop_get(zhp, ZFS_PROP_MOUNTPOINT, mtpt_prop,
6068                     sizeof (mtpt_prop), NULL, NULL, 0, B_FALSE) == 0);
6069
6070                 if (is_manual) {
6071                         ret = zfs_unmount(zhp, NULL, flags);
6072                 } else if (strcmp(mtpt_prop, "legacy") == 0) {
6073                         (void) fprintf(stderr, gettext("cannot unmount "
6074                             "'%s': legacy mountpoint\n"),
6075                             zfs_get_name(zhp));
6076                         (void) fprintf(stderr, gettext("use umount(8) "
6077                             "to unmount this filesystem\n"));
6078                 } else {
6079                         ret = zfs_unmountall(zhp, flags);
6080                 }
6081         }
6082
6083 out:
6084         zfs_close(zhp);
6085
6086         return (ret != 0);
6087 }
6088
6089 /*
6090  * Generic callback for unsharing or unmounting a filesystem.
6091  */
6092 static int
6093 unshare_unmount(int op, int argc, char **argv)
6094 {
6095         int do_all = 0;
6096         int flags = 0;
6097         int ret = 0;
6098         int c;
6099         zfs_handle_t *zhp;
6100         char nfs_mnt_prop[ZFS_MAXPROPLEN];
6101         char sharesmb[ZFS_MAXPROPLEN];
6102
6103         /* check options */
6104         while ((c = getopt(argc, argv, op == OP_SHARE ? "a" : "af")) != -1) {
6105                 switch (c) {
6106                 case 'a':
6107                         do_all = 1;
6108                         break;
6109                 case 'f':
6110                         flags = MS_FORCE;
6111                         break;
6112                 case '?':
6113                         (void) fprintf(stderr, gettext("invalid option '%c'\n"),
6114                             optopt);
6115                         usage(B_FALSE);
6116                 }
6117         }
6118
6119         argc -= optind;
6120         argv += optind;
6121
6122         if (do_all) {
6123                 /*
6124                  * We could make use of zfs_for_each() to walk all datasets in
6125                  * the system, but this would be very inefficient, especially
6126                  * since we would have to linearly search /etc/mnttab for each
6127                  * one.  Instead, do one pass through /etc/mnttab looking for
6128                  * zfs entries and call zfs_unmount() for each one.
6129                  *
6130                  * Things get a little tricky if the administrator has created
6131                  * mountpoints beneath other ZFS filesystems.  In this case, we
6132                  * have to unmount the deepest filesystems first.  To accomplish
6133                  * this, we place all the mountpoints in an AVL tree sorted by
6134                  * the special type (dataset name), and walk the result in
6135                  * reverse to make sure to get any snapshots first.
6136                  */
6137                 struct mnttab entry;
6138                 uu_avl_pool_t *pool;
6139                 uu_avl_t *tree;
6140                 unshare_unmount_node_t *node;
6141                 uu_avl_index_t idx;
6142                 uu_avl_walk_t *walk;
6143
6144                 if (argc != 0) {
6145                         (void) fprintf(stderr, gettext("too many arguments\n"));
6146                         usage(B_FALSE);
6147                 }
6148
6149                 if (((pool = uu_avl_pool_create("unmount_pool",
6150                     sizeof (unshare_unmount_node_t),
6151                     offsetof(unshare_unmount_node_t, un_avlnode),
6152                     unshare_unmount_compare, UU_DEFAULT)) == NULL) ||
6153                     ((tree = uu_avl_create(pool, NULL, UU_DEFAULT)) == NULL))
6154                         nomem();
6155
6156                 rewind(mnttab_file);
6157                 while (getmntent(mnttab_file, &entry) == 0) {
6158
6159                         /* ignore non-ZFS entries */
6160                         if (strcmp(entry.mnt_fstype, MNTTYPE_ZFS) != 0)
6161                                 continue;
6162
6163                         /* ignore snapshots */
6164                         if (strchr(entry.mnt_special, '@') != NULL)
6165                                 continue;
6166
6167                         if ((zhp = zfs_open(g_zfs, entry.mnt_special,
6168                             ZFS_TYPE_FILESYSTEM)) == NULL) {
6169                                 ret = 1;
6170                                 continue;
6171                         }
6172
6173                         switch (op) {
6174                         case OP_SHARE:
6175                                 verify(zfs_prop_get(zhp, ZFS_PROP_SHARENFS,
6176                                     nfs_mnt_prop,
6177                                     sizeof (nfs_mnt_prop),
6178                                     NULL, NULL, 0, B_FALSE) == 0);
6179                                 if (strcmp(nfs_mnt_prop, "off") != 0)
6180                                         break;
6181                                 verify(zfs_prop_get(zhp, ZFS_PROP_SHARESMB,
6182                                     nfs_mnt_prop,
6183                                     sizeof (nfs_mnt_prop),
6184                                     NULL, NULL, 0, B_FALSE) == 0);
6185                                 if (strcmp(nfs_mnt_prop, "off") == 0)
6186                                         continue;
6187                                 break;
6188                         case OP_MOUNT:
6189                                 /* Ignore legacy mounts */
6190                                 verify(zfs_prop_get(zhp, ZFS_PROP_MOUNTPOINT,
6191                                     nfs_mnt_prop,
6192                                     sizeof (nfs_mnt_prop),
6193                                     NULL, NULL, 0, B_FALSE) == 0);
6194                                 if (strcmp(nfs_mnt_prop, "legacy") == 0)
6195                                         continue;
6196                                 /* Ignore canmount=noauto mounts */
6197                                 if (zfs_prop_get_int(zhp, ZFS_PROP_CANMOUNT) ==
6198                                     ZFS_CANMOUNT_NOAUTO)
6199                                         continue;
6200                         default:
6201                                 break;
6202                         }
6203
6204                         node = safe_malloc(sizeof (unshare_unmount_node_t));
6205                         node->un_zhp = zhp;
6206                         node->un_mountp = safe_strdup(entry.mnt_mountp);
6207
6208                         uu_avl_node_init(node, &node->un_avlnode, pool);
6209
6210                         if (uu_avl_find(tree, node, NULL, &idx) == NULL) {
6211                                 uu_avl_insert(tree, node, idx);
6212                         } else {
6213                                 zfs_close(node->un_zhp);
6214                                 free(node->un_mountp);
6215                                 free(node);
6216                         }
6217                 }
6218
6219                 /*
6220                  * Walk the AVL tree in reverse, unmounting each filesystem and
6221                  * removing it from the AVL tree in the process.
6222                  */
6223                 if ((walk = uu_avl_walk_start(tree,
6224                     UU_WALK_REVERSE | UU_WALK_ROBUST)) == NULL)
6225                         nomem();
6226
6227                 while ((node = uu_avl_walk_next(walk)) != NULL) {
6228                         uu_avl_remove(tree, node);
6229
6230                         switch (op) {
6231                         case OP_SHARE:
6232                                 if (zfs_unshareall_bypath(node->un_zhp,
6233                                     node->un_mountp) != 0)
6234                                         ret = 1;
6235                                 break;
6236
6237                         case OP_MOUNT:
6238                                 if (zfs_unmount(node->un_zhp,
6239                                     node->un_mountp, flags) != 0)
6240                                         ret = 1;
6241                                 break;
6242                         }
6243
6244                         zfs_close(node->un_zhp);
6245                         free(node->un_mountp);
6246                         free(node);
6247                 }
6248
6249                 uu_avl_walk_end(walk);
6250                 uu_avl_destroy(tree);
6251                 uu_avl_pool_destroy(pool);
6252
6253         } else {
6254                 if (argc != 1) {
6255                         if (argc == 0)
6256                                 (void) fprintf(stderr,
6257                                     gettext("missing filesystem argument\n"));
6258                         else
6259                                 (void) fprintf(stderr,
6260                                     gettext("too many arguments\n"));
6261                         usage(B_FALSE);
6262                 }
6263
6264                 /*
6265                  * We have an argument, but it may be a full path or a ZFS
6266                  * filesystem.  Pass full paths off to unmount_path() (shared by
6267                  * manual_unmount), otherwise open the filesystem and pass to
6268                  * zfs_unmount().
6269                  */
6270                 if (argv[0][0] == '/')
6271                         return (unshare_unmount_path(op, argv[0],
6272                             flags, B_FALSE));
6273
6274                 if ((zhp = zfs_open(g_zfs, argv[0],
6275                     ZFS_TYPE_FILESYSTEM)) == NULL)
6276                         return (1);
6277
6278                 verify(zfs_prop_get(zhp, op == OP_SHARE ?
6279                     ZFS_PROP_SHARENFS : ZFS_PROP_MOUNTPOINT,
6280                     nfs_mnt_prop, sizeof (nfs_mnt_prop), NULL,
6281                     NULL, 0, B_FALSE) == 0);
6282
6283                 switch (op) {
6284                 case OP_SHARE:
6285                         verify(zfs_prop_get(zhp, ZFS_PROP_SHARENFS,
6286                             nfs_mnt_prop,
6287                             sizeof (nfs_mnt_prop),
6288                             NULL, NULL, 0, B_FALSE) == 0);
6289                         verify(zfs_prop_get(zhp, ZFS_PROP_SHARESMB,
6290                             sharesmb, sizeof (sharesmb), NULL, NULL,
6291                             0, B_FALSE) == 0);
6292
6293                         if (strcmp(nfs_mnt_prop, "off") == 0 &&
6294                             strcmp(sharesmb, "off") == 0) {
6295                                 (void) fprintf(stderr, gettext("cannot "
6296                                     "unshare '%s': legacy share\n"),
6297                                     zfs_get_name(zhp));
6298 #ifdef illumos
6299                                 (void) fprintf(stderr, gettext("use "
6300                                     "unshare(1M) to unshare this "
6301                                     "filesystem\n"));
6302 #endif
6303                                 ret = 1;
6304                         } else if (!zfs_is_shared(zhp)) {
6305                                 (void) fprintf(stderr, gettext("cannot "
6306                                     "unshare '%s': not currently "
6307                                     "shared\n"), zfs_get_name(zhp));
6308                                 ret = 1;
6309                         } else if (zfs_unshareall(zhp) != 0) {
6310                                 ret = 1;
6311                         }
6312                         break;
6313
6314                 case OP_MOUNT:
6315                         if (strcmp(nfs_mnt_prop, "legacy") == 0) {
6316                                 (void) fprintf(stderr, gettext("cannot "
6317                                     "unmount '%s': legacy "
6318                                     "mountpoint\n"), zfs_get_name(zhp));
6319                                 (void) fprintf(stderr, gettext("use "
6320                                     "umount(8) to unmount this "
6321                                     "filesystem\n"));
6322                                 ret = 1;
6323                         } else if (!zfs_is_mounted(zhp, NULL)) {
6324                                 (void) fprintf(stderr, gettext("cannot "
6325                                     "unmount '%s': not currently "
6326                                     "mounted\n"),
6327                                     zfs_get_name(zhp));
6328                                 ret = 1;
6329                         } else if (zfs_unmountall(zhp, flags) != 0) {
6330                                 ret = 1;
6331                         }
6332                         break;
6333                 }
6334
6335                 zfs_close(zhp);
6336         }
6337
6338         return (ret);
6339 }
6340
6341 /*
6342  * zfs unmount -a
6343  * zfs unmount filesystem
6344  *
6345  * Unmount all filesystems, or a specific ZFS filesystem.
6346  */
6347 static int
6348 zfs_do_unmount(int argc, char **argv)
6349 {
6350         return (unshare_unmount(OP_MOUNT, argc, argv));
6351 }
6352
6353 /*
6354  * zfs unshare -a
6355  * zfs unshare filesystem
6356  *
6357  * Unshare all filesystems, or a specific ZFS filesystem.
6358  */
6359 static int
6360 zfs_do_unshare(int argc, char **argv)
6361 {
6362         return (unshare_unmount(OP_SHARE, argc, argv));
6363 }
6364
6365 /*
6366  * Attach/detach the given dataset to/from the given jail
6367  */
6368 /* ARGSUSED */
6369 static int
6370 do_jail(int argc, char **argv, int attach)
6371 {
6372         zfs_handle_t *zhp;
6373         int jailid, ret;
6374
6375         /* check number of arguments */
6376         if (argc < 3) {
6377                 (void) fprintf(stderr, gettext("missing argument(s)\n"));
6378                 usage(B_FALSE);
6379         }
6380         if (argc > 3) {
6381                 (void) fprintf(stderr, gettext("too many arguments\n"));
6382                 usage(B_FALSE);
6383         }
6384
6385         jailid = jail_getid(argv[1]);
6386         if (jailid < 0) {
6387                 (void) fprintf(stderr, gettext("invalid jail id or name\n"));
6388                 usage(B_FALSE);
6389         }
6390
6391         zhp = zfs_open(g_zfs, argv[2], ZFS_TYPE_FILESYSTEM);
6392         if (zhp == NULL)
6393                 return (1);
6394
6395         ret = (zfs_jail(zhp, jailid, attach) != 0);
6396
6397         zfs_close(zhp);
6398         return (ret);
6399 }
6400
6401 /*
6402  * zfs jail jailid filesystem
6403  *
6404  * Attach the given dataset to the given jail
6405  */
6406 /* ARGSUSED */
6407 static int
6408 zfs_do_jail(int argc, char **argv)
6409 {
6410
6411         return (do_jail(argc, argv, 1));
6412 }
6413
6414 /*
6415  * zfs unjail jailid filesystem
6416  *
6417  * Detach the given dataset from the given jail
6418  */
6419 /* ARGSUSED */
6420 static int
6421 zfs_do_unjail(int argc, char **argv)
6422 {
6423
6424         return (do_jail(argc, argv, 0));
6425 }
6426
6427 /*
6428  * Called when invoked as /etc/fs/zfs/mount.  Do the mount if the mountpoint is
6429  * 'legacy'.  Otherwise, complain that use should be using 'zfs mount'.
6430  */
6431 static int
6432 manual_mount(int argc, char **argv)
6433 {
6434         zfs_handle_t *zhp;
6435         char mountpoint[ZFS_MAXPROPLEN];
6436         char mntopts[MNT_LINE_MAX] = { '\0' };
6437         int ret = 0;
6438         int c;
6439         int flags = 0;
6440         char *dataset, *path;
6441
6442         /* check options */
6443         while ((c = getopt(argc, argv, ":mo:O")) != -1) {
6444                 switch (c) {
6445                 case 'o':
6446                         (void) strlcpy(mntopts, optarg, sizeof (mntopts));
6447                         break;
6448                 case 'O':
6449                         flags |= MS_OVERLAY;
6450                         break;
6451                 case 'm':
6452                         flags |= MS_NOMNTTAB;
6453                         break;
6454                 case ':':
6455                         (void) fprintf(stderr, gettext("missing argument for "
6456                             "'%c' option\n"), optopt);
6457                         usage(B_FALSE);
6458                         break;
6459                 case '?':
6460                         (void) fprintf(stderr, gettext("invalid option '%c'\n"),
6461                             optopt);
6462                         (void) fprintf(stderr, gettext("usage: mount [-o opts] "
6463                             "<path>\n"));
6464                         return (2);
6465                 }
6466         }
6467
6468         argc -= optind;
6469         argv += optind;
6470
6471         /* check that we only have two arguments */
6472         if (argc != 2) {
6473                 if (argc == 0)
6474                         (void) fprintf(stderr, gettext("missing dataset "
6475                             "argument\n"));
6476                 else if (argc == 1)
6477                         (void) fprintf(stderr,
6478                             gettext("missing mountpoint argument\n"));
6479                 else
6480                         (void) fprintf(stderr, gettext("too many arguments\n"));
6481                 (void) fprintf(stderr, "usage: mount <dataset> <mountpoint>\n");
6482                 return (2);
6483         }
6484
6485         dataset = argv[0];
6486         path = argv[1];
6487
6488         /* try to open the dataset */
6489         if ((zhp = zfs_open(g_zfs, dataset, ZFS_TYPE_FILESYSTEM)) == NULL)
6490                 return (1);
6491
6492         (void) zfs_prop_get(zhp, ZFS_PROP_MOUNTPOINT, mountpoint,
6493             sizeof (mountpoint), NULL, NULL, 0, B_FALSE);
6494
6495         /* check for legacy mountpoint and complain appropriately */
6496         ret = 0;
6497         if (strcmp(mountpoint, ZFS_MOUNTPOINT_LEGACY) == 0) {
6498                 if (zmount(dataset, path, flags, MNTTYPE_ZFS,
6499                     NULL, 0, mntopts, sizeof (mntopts)) != 0) {
6500                         (void) fprintf(stderr, gettext("mount failed: %s\n"),
6501                             strerror(errno));
6502                         ret = 1;
6503                 }
6504         } else {
6505                 (void) fprintf(stderr, gettext("filesystem '%s' cannot be "
6506                     "mounted using 'mount -t zfs'\n"), dataset);
6507                 (void) fprintf(stderr, gettext("Use 'zfs set mountpoint=%s' "
6508                     "instead.\n"), path);
6509                 (void) fprintf(stderr, gettext("If you must use 'mount -t zfs' "
6510                     "or /etc/fstab, use 'zfs set mountpoint=legacy'.\n"));
6511                 (void) fprintf(stderr, gettext("See zfs(8) for more "
6512                     "information.\n"));
6513                 ret = 1;
6514         }
6515
6516         return (ret);
6517 }
6518
6519 /*
6520  * Called when invoked as /etc/fs/zfs/umount.  Unlike a manual mount, we allow
6521  * unmounts of non-legacy filesystems, as this is the dominant administrative
6522  * interface.
6523  */
6524 static int
6525 manual_unmount(int argc, char **argv)
6526 {
6527         int flags = 0;
6528         int c;
6529
6530         /* check options */
6531         while ((c = getopt(argc, argv, "f")) != -1) {
6532                 switch (c) {
6533                 case 'f':
6534                         flags = MS_FORCE;
6535                         break;
6536                 case '?':
6537                         (void) fprintf(stderr, gettext("invalid option '%c'\n"),
6538                             optopt);
6539                         (void) fprintf(stderr, gettext("usage: unmount [-f] "
6540                             "<path>\n"));
6541                         return (2);
6542                 }
6543         }
6544
6545         argc -= optind;
6546         argv += optind;
6547
6548         /* check arguments */
6549         if (argc != 1) {
6550                 if (argc == 0)
6551                         (void) fprintf(stderr, gettext("missing path "
6552                             "argument\n"));
6553                 else
6554                         (void) fprintf(stderr, gettext("too many arguments\n"));
6555                 (void) fprintf(stderr, gettext("usage: unmount [-f] <path>\n"));
6556                 return (2);
6557         }
6558
6559         return (unshare_unmount_path(OP_MOUNT, argv[0], flags, B_TRUE));
6560 }
6561
6562 static int
6563 find_command_idx(char *command, int *idx)
6564 {
6565         int i;
6566
6567         for (i = 0; i < NCOMMAND; i++) {
6568                 if (command_table[i].name == NULL)
6569                         continue;
6570
6571                 if (strcmp(command, command_table[i].name) == 0) {
6572                         *idx = i;
6573                         return (0);
6574                 }
6575         }
6576         return (1);
6577 }
6578
6579 static int
6580 zfs_do_diff(int argc, char **argv)
6581 {
6582         zfs_handle_t *zhp;
6583         int flags = 0;
6584         char *tosnap = NULL;
6585         char *fromsnap = NULL;
6586         char *atp, *copy;
6587         int err = 0;
6588         int c;
6589
6590         while ((c = getopt(argc, argv, "FHt")) != -1) {
6591                 switch (c) {
6592                 case 'F':
6593                         flags |= ZFS_DIFF_CLASSIFY;
6594                         break;
6595                 case 'H':
6596                         flags |= ZFS_DIFF_PARSEABLE;
6597                         break;
6598                 case 't':
6599                         flags |= ZFS_DIFF_TIMESTAMP;
6600                         break;
6601                 default:
6602                         (void) fprintf(stderr,
6603                             gettext("invalid option '%c'\n"), optopt);
6604                         usage(B_FALSE);
6605                 }
6606         }
6607
6608         argc -= optind;
6609         argv += optind;
6610
6611         if (argc < 1) {
6612                 (void) fprintf(stderr,
6613                 gettext("must provide at least one snapshot name\n"));
6614                 usage(B_FALSE);
6615         }
6616
6617         if (argc > 2) {
6618                 (void) fprintf(stderr, gettext("too many arguments\n"));
6619                 usage(B_FALSE);
6620         }
6621
6622         fromsnap = argv[0];
6623         tosnap = (argc == 2) ? argv[1] : NULL;
6624
6625         copy = NULL;
6626         if (*fromsnap != '@')
6627                 copy = strdup(fromsnap);
6628         else if (tosnap)
6629                 copy = strdup(tosnap);
6630         if (copy == NULL)
6631                 usage(B_FALSE);
6632
6633         if (atp = strchr(copy, '@'))
6634                 *atp = '\0';
6635
6636         if ((zhp = zfs_open(g_zfs, copy, ZFS_TYPE_FILESYSTEM)) == NULL)
6637                 return (1);
6638
6639         free(copy);
6640
6641         /*
6642          * Ignore SIGPIPE so that the library can give us
6643          * information on any failure
6644          */
6645         (void) sigignore(SIGPIPE);
6646
6647         err = zfs_show_diffs(zhp, STDOUT_FILENO, fromsnap, tosnap, flags);
6648
6649         zfs_close(zhp);
6650
6651         return (err != 0);
6652 }
6653
6654 int
6655 main(int argc, char **argv)
6656 {
6657         int ret = 0;
6658         int i;
6659         char *progname;
6660         char *cmdname;
6661
6662         (void) setlocale(LC_ALL, "");
6663         (void) textdomain(TEXT_DOMAIN);
6664
6665         opterr = 0;
6666
6667         if ((g_zfs = libzfs_init()) == NULL) {
6668                 (void) fprintf(stderr, gettext("internal error: failed to "
6669                     "initialize ZFS library\n"));
6670                 return (1);
6671         }
6672
6673         zfs_save_arguments(argc, argv, history_str, sizeof (history_str));
6674
6675         libzfs_print_on_error(g_zfs, B_TRUE);
6676
6677         if ((mnttab_file = fopen(MNTTAB, "r")) == NULL) {
6678                 (void) fprintf(stderr, gettext("internal error: unable to "
6679                     "open %s\n"), MNTTAB);
6680                 return (1);
6681         }
6682
6683         /*
6684          * This command also doubles as the /etc/fs mount and unmount program.
6685          * Determine if we should take this behavior based on argv[0].
6686          */
6687         progname = basename(argv[0]);
6688         if (strcmp(progname, "mount") == 0) {
6689                 ret = manual_mount(argc, argv);
6690         } else if (strcmp(progname, "umount") == 0) {
6691                 ret = manual_unmount(argc, argv);
6692         } else {
6693                 /*
6694                  * Make sure the user has specified some command.
6695                  */
6696                 if (argc < 2) {
6697                         (void) fprintf(stderr, gettext("missing command\n"));
6698                         usage(B_FALSE);
6699                 }
6700
6701                 cmdname = argv[1];
6702
6703                 /*
6704                  * The 'umount' command is an alias for 'unmount'
6705                  */
6706                 if (strcmp(cmdname, "umount") == 0)
6707                         cmdname = "unmount";
6708
6709                 /*
6710                  * The 'recv' command is an alias for 'receive'
6711                  */
6712                 if (strcmp(cmdname, "recv") == 0)
6713                         cmdname = "receive";
6714
6715                 /*
6716                  * Special case '-?'
6717                  */
6718                 if (strcmp(cmdname, "-?") == 0)
6719                         usage(B_TRUE);
6720
6721                 /*
6722                  * Run the appropriate command.
6723                  */
6724                 libzfs_mnttab_cache(g_zfs, B_TRUE);
6725                 if (find_command_idx(cmdname, &i) == 0) {
6726                         current_command = &command_table[i];
6727                         ret = command_table[i].func(argc - 1, argv + 1);
6728                 } else if (strchr(cmdname, '=') != NULL) {
6729                         verify(find_command_idx("set", &i) == 0);
6730                         current_command = &command_table[i];
6731                         ret = command_table[i].func(argc, argv);
6732                 } else {
6733                         (void) fprintf(stderr, gettext("unrecognized "
6734                             "command '%s'\n"), cmdname);
6735                         usage(B_FALSE);
6736                 }
6737                 libzfs_mnttab_cache(g_zfs, B_FALSE);
6738         }
6739
6740         (void) fclose(mnttab_file);
6741
6742         if (ret == 0 && log_history)
6743                 (void) zpool_log_history(g_zfs, history_str);
6744
6745         libzfs_fini(g_zfs);
6746
6747         /*
6748          * The 'ZFS_ABORT' environment variable causes us to dump core on exit
6749          * for the purposes of running ::findleaks.
6750          */
6751         if (getenv("ZFS_ABORT") != NULL) {
6752                 (void) printf("dumping core by request\n");
6753                 abort();
6754         }
6755
6756         return (ret);
6757 }