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