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