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