cddl/contrib/opensolaris/lib/libzfs/common/libzfs_dataset.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 (c) 2013, Joyent, Inc. All rights reserved.
  25  * Copyright (c) 2011, 2015 by Delphix. All rights reserved.
  26  * Copyright (c) 2012 DEY Storage Systems, Inc.  All rights reserved.
  27  * Copyright (c) 2011-2012 Pawel Jakub Dawidek. All rights reserved.
  28  * Copyright (c) 2013 Martin Matuska. All rights reserved.
  29  * Copyright (c) 2013 Steven Hartland. All rights reserved.
  30  * Copyright 2013 Nexenta Systems, Inc.  All rights reserved.
  31  * Copyright (c) 2014 Integros [integros.com]
  32  * Copyright 2016 Igor Kozhukhov <ikozhukhov@gmail.com>
  33  */
  34
  35 #include <ctype.h>
  36 #include <errno.h>
  37 #include <libintl.h>
  38 #include <math.h>
  39 #include <stdio.h>
  40 #include <stdlib.h>
  41 #include <strings.h>
  42 #include <unistd.h>
  43 #include <stddef.h>
  44 #include <zone.h>
  45 #include <fcntl.h>
  46 #include <sys/mntent.h>
  47 #include <sys/mount.h>
  48 #include <priv.h>
  49 #include <pwd.h>
  50 #include <grp.h>
  51 #include <stddef.h>
  52 #include <idmap.h>
  53
  54 #include <sys/dnode.h>
  55 #include <sys/spa.h>
  56 #include <sys/zap.h>
  57 #include <sys/misc.h>
  58 #include <libzfs.h>
  59
  60 #include "zfs_namecheck.h"
  61 #include "zfs_prop.h"
  62 #include "libzfs_impl.h"
  63 #include "zfs_deleg.h"
  64
  65 static int userquota_propname_decode(const char *propname, boolean_t zoned,
  66     zfs_userquota_prop_t *typep, char *domain, int domainlen, uint64_t *ridp);
  67
  68 /*
  69  * Given a single type (not a mask of types), return the type in a human
  70  * readable form.
  71  */
  72 const char *
  73 zfs_type_to_name(zfs_type_t type)
  74 {
  75         switch (type) {
  76         case ZFS_TYPE_FILESYSTEM:
  77                 return (dgettext(TEXT_DOMAIN, "filesystem"));
  78         case ZFS_TYPE_SNAPSHOT:
  79                 return (dgettext(TEXT_DOMAIN, "snapshot"));
  80         case ZFS_TYPE_VOLUME:
  81                 return (dgettext(TEXT_DOMAIN, "volume"));
  82         case ZFS_TYPE_POOL:
  83                 return (dgettext(TEXT_DOMAIN, "pool"));
  84         case ZFS_TYPE_BOOKMARK:
  85                 return (dgettext(TEXT_DOMAIN, "bookmark"));
  86         default:
  87                 assert(!"unhandled zfs_type_t");
  88         }
  89
  90         return (NULL);
  91 }
  92
  93 /*
  94  * Validate a ZFS path.  This is used even before trying to open the dataset, to
  95  * provide a more meaningful error message.  We call zfs_error_aux() to
  96  * explain exactly why the name was not valid.
  97  */
  98 int
  99 zfs_validate_name(libzfs_handle_t *hdl, const char *path, int type,
 100     boolean_t modifying)
 101 {
 102         namecheck_err_t why;
 103         char what;
 104
 105         (void) zfs_prop_get_table();
 106         if (dataset_namecheck(path, &why, &what) != 0) {
 107                 if (hdl != NULL) {
 108                         switch (why) {
 109                         case NAME_ERR_TOOLONG:
 110                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 111                                     "name is too long"));
 112                                 break;
 113
 114                         case NAME_ERR_LEADING_SLASH:
 115                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 116                                     "leading slash in name"));
 117                                 break;
 118
 119                         case NAME_ERR_EMPTY_COMPONENT:
 120                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 121                                     "empty component in name"));
 122                                 break;
 123
 124                         case NAME_ERR_TRAILING_SLASH:
 125                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 126                                     "trailing slash in name"));
 127                                 break;
 128
 129                         case NAME_ERR_INVALCHAR:
 130                                 zfs_error_aux(hdl,
 131                                     dgettext(TEXT_DOMAIN, "invalid character "
 132                                     "'%c' in name"), what);
 133                                 break;
 134
 135                         case NAME_ERR_MULTIPLE_AT:
 136                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 137                                     "multiple '@' delimiters in name"));
 138                                 break;
 139
 140                         case NAME_ERR_NOLETTER:
 141                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 142                                     "pool doesn't begin with a letter"));
 143                                 break;
 144
 145                         case NAME_ERR_RESERVED:
 146                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 147                                     "name is reserved"));
 148                                 break;
 149
 150                         case NAME_ERR_DISKLIKE:
 151                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 152                                     "reserved disk name"));
 153                                 break;
 154
 155                         default:
 156                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 157                                     "(%d) not defined"), why);
 158                                 break;
 159                         }
 160                 }
 161
 162                 return (0);
 163         }
 164
 165         if (!(type & ZFS_TYPE_SNAPSHOT) && strchr(path, '@') != NULL) {
 166                 if (hdl != NULL)
 167                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 168                             "snapshot delimiter '@' in filesystem name"));
 169                 return (0);
 170         }
 171
 172         if (type == ZFS_TYPE_SNAPSHOT && strchr(path, '@') == NULL) {
 173                 if (hdl != NULL)
 174                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 175                             "missing '@' delimiter in snapshot name"));
 176                 return (0);
 177         }
 178
 179         if (modifying && strchr(path, '%') != NULL) {
 180                 if (hdl != NULL)
 181                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 182                             "invalid character %c in name"), '%');
 183                 return (0);
 184         }
 185
 186         return (-1);
 187 }
 188
 189 int
 190 zfs_name_valid(const char *name, zfs_type_t type)
 191 {
 192         if (type == ZFS_TYPE_POOL)
 193                 return (zpool_name_valid(NULL, B_FALSE, name));
 194         return (zfs_validate_name(NULL, name, type, B_FALSE));
 195 }
 196
 197 /*
 198  * This function takes the raw DSL properties, and filters out the user-defined
 199  * properties into a separate nvlist.
 200  */
 201 static nvlist_t *
 202 process_user_props(zfs_handle_t *zhp, nvlist_t *props)
 203 {
 204         libzfs_handle_t *hdl = zhp->zfs_hdl;
 205         nvpair_t *elem;
 206         nvlist_t *propval;
 207         nvlist_t *nvl;
 208
 209         if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0) != 0) {
 210                 (void) no_memory(hdl);
 211                 return (NULL);
 212         }
 213
 214         elem = NULL;
 215         while ((elem = nvlist_next_nvpair(props, elem)) != NULL) {
 216                 if (!zfs_prop_user(nvpair_name(elem)))
 217                         continue;
 218
 219                 verify(nvpair_value_nvlist(elem, &propval) == 0);
 220                 if (nvlist_add_nvlist(nvl, nvpair_name(elem), propval) != 0) {
 221                         nvlist_free(nvl);
 222                         (void) no_memory(hdl);
 223                         return (NULL);
 224                 }
 225         }
 226
 227         return (nvl);
 228 }
 229
 230 static zpool_handle_t *
 231 zpool_add_handle(zfs_handle_t *zhp, const char *pool_name)
 232 {
 233         libzfs_handle_t *hdl = zhp->zfs_hdl;
 234         zpool_handle_t *zph;
 235
 236         if ((zph = zpool_open_canfail(hdl, pool_name)) != NULL) {
 237                 if (hdl->libzfs_pool_handles != NULL)
 238                         zph->zpool_next = hdl->libzfs_pool_handles;
 239                 hdl->libzfs_pool_handles = zph;
 240         }
 241         return (zph);
 242 }
 243
 244 static zpool_handle_t *
 245 zpool_find_handle(zfs_handle_t *zhp, const char *pool_name, int len)
 246 {
 247         libzfs_handle_t *hdl = zhp->zfs_hdl;
 248         zpool_handle_t *zph = hdl->libzfs_pool_handles;
 249
 250         while ((zph != NULL) &&
 251             (strncmp(pool_name, zpool_get_name(zph), len) != 0))
 252                 zph = zph->zpool_next;
 253         return (zph);
 254 }
 255
 256 /*
 257  * Returns a handle to the pool that contains the provided dataset.
 258  * If a handle to that pool already exists then that handle is returned.
 259  * Otherwise, a new handle is created and added to the list of handles.
 260  */
 261 static zpool_handle_t *
 262 zpool_handle(zfs_handle_t *zhp)
 263 {
 264         char *pool_name;
 265         int len;
 266         zpool_handle_t *zph;
 267
 268         len = strcspn(zhp->zfs_name, "/@#") + 1;
 269         pool_name = zfs_alloc(zhp->zfs_hdl, len);
 270         (void) strlcpy(pool_name, zhp->zfs_name, len);
 271
 272         zph = zpool_find_handle(zhp, pool_name, len);
 273         if (zph == NULL)
 274                 zph = zpool_add_handle(zhp, pool_name);
 275
 276         free(pool_name);
 277         return (zph);
 278 }
 279
 280 void
 281 zpool_free_handles(libzfs_handle_t *hdl)
 282 {
 283         zpool_handle_t *next, *zph = hdl->libzfs_pool_handles;
 284
 285         while (zph != NULL) {
 286                 next = zph->zpool_next;
 287                 zpool_close(zph);
 288                 zph = next;
 289         }
 290         hdl->libzfs_pool_handles = NULL;
 291 }
 292
 293 /*
 294  * Utility function to gather stats (objset and zpl) for the given object.
 295  */
 296 static int
 297 get_stats_ioctl(zfs_handle_t *zhp, zfs_cmd_t *zc)
 298 {
 299         libzfs_handle_t *hdl = zhp->zfs_hdl;
 300
 301         (void) strlcpy(zc->zc_name, zhp->zfs_name, sizeof (zc->zc_name));
 302
 303         while (ioctl(hdl->libzfs_fd, ZFS_IOC_OBJSET_STATS, zc) != 0) {
 304                 if (errno == ENOMEM) {
 305                         if (zcmd_expand_dst_nvlist(hdl, zc) != 0) {
 306                                 return (-1);
 307                         }
 308                 } else {
 309                         return (-1);
 310                 }
 311         }
 312         return (0);
 313 }
 314
 315 /*
 316  * Utility function to get the received properties of the given object.
 317  */
 318 static int
 319 get_recvd_props_ioctl(zfs_handle_t *zhp)
 320 {
 321         libzfs_handle_t *hdl = zhp->zfs_hdl;
 322         nvlist_t *recvdprops;
 323         zfs_cmd_t zc = { 0 };
 324         int err;
 325
 326         if (zcmd_alloc_dst_nvlist(hdl, &zc, 0) != 0)
 327                 return (-1);
 328
 329         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
 330
 331         while (ioctl(hdl->libzfs_fd, ZFS_IOC_OBJSET_RECVD_PROPS, &zc) != 0) {
 332                 if (errno == ENOMEM) {
 333                         if (zcmd_expand_dst_nvlist(hdl, &zc) != 0) {
 334                                 return (-1);
 335                         }
 336                 } else {
 337                         zcmd_free_nvlists(&zc);
 338                         return (-1);
 339                 }
 340         }
 341
 342         err = zcmd_read_dst_nvlist(zhp->zfs_hdl, &zc, &recvdprops);
 343         zcmd_free_nvlists(&zc);
 344         if (err != 0)
 345                 return (-1);
 346
 347         nvlist_free(zhp->zfs_recvd_props);
 348         zhp->zfs_recvd_props = recvdprops;
 349
 350         return (0);
 351 }
 352
 353 static int
 354 put_stats_zhdl(zfs_handle_t *zhp, zfs_cmd_t *zc)
 355 {
 356         nvlist_t *allprops, *userprops;
 357
 358         zhp->zfs_dmustats = zc->zc_objset_stats; /* structure assignment */
 359
 360         if (zcmd_read_dst_nvlist(zhp->zfs_hdl, zc, &allprops) != 0) {
 361                 return (-1);
 362         }
 363
 364         /*
 365          * XXX Why do we store the user props separately, in addition to
 366          * storing them in zfs_props?
 367          */
 368         if ((userprops = process_user_props(zhp, allprops)) == NULL) {
 369                 nvlist_free(allprops);
 370                 return (-1);
 371         }
 372
 373         nvlist_free(zhp->zfs_props);
 374         nvlist_free(zhp->zfs_user_props);
 375
 376         zhp->zfs_props = allprops;
 377         zhp->zfs_user_props = userprops;
 378
 379         return (0);
 380 }
 381
 382 static int
 383 get_stats(zfs_handle_t *zhp)
 384 {
 385         int rc = 0;
 386         zfs_cmd_t zc = { 0 };
 387
 388         if (zcmd_alloc_dst_nvlist(zhp->zfs_hdl, &zc, 0) != 0)
 389                 return (-1);
 390         if (get_stats_ioctl(zhp, &zc) != 0)
 391                 rc = -1;
 392         else if (put_stats_zhdl(zhp, &zc) != 0)
 393                 rc = -1;
 394         zcmd_free_nvlists(&zc);
 395         return (rc);
 396 }
 397
 398 /*
 399  * Refresh the properties currently stored in the handle.
 400  */
 401 void
 402 zfs_refresh_properties(zfs_handle_t *zhp)
 403 {
 404         (void) get_stats(zhp);
 405 }
 406
 407 /*
 408  * Makes a handle from the given dataset name.  Used by zfs_open() and
 409  * zfs_iter_* to create child handles on the fly.
 410  */
 411 static int
 412 make_dataset_handle_common(zfs_handle_t *zhp, zfs_cmd_t *zc)
 413 {
 414         if (put_stats_zhdl(zhp, zc) != 0)
 415                 return (-1);
 416
 417         /*
 418          * We've managed to open the dataset and gather statistics.  Determine
 419          * the high-level type.
 420          */
 421         if (zhp->zfs_dmustats.dds_type == DMU_OST_ZVOL)
 422                 zhp->zfs_head_type = ZFS_TYPE_VOLUME;
 423         else if (zhp->zfs_dmustats.dds_type == DMU_OST_ZFS)
 424                 zhp->zfs_head_type = ZFS_TYPE_FILESYSTEM;
 425         else
 426                 abort();
 427
 428         if (zhp->zfs_dmustats.dds_is_snapshot)
 429                 zhp->zfs_type = ZFS_TYPE_SNAPSHOT;
 430         else if (zhp->zfs_dmustats.dds_type == DMU_OST_ZVOL)
 431                 zhp->zfs_type = ZFS_TYPE_VOLUME;
 432         else if (zhp->zfs_dmustats.dds_type == DMU_OST_ZFS)
 433                 zhp->zfs_type = ZFS_TYPE_FILESYSTEM;
 434         else
 435                 abort();        /* we should never see any other types */
 436
 437         if ((zhp->zpool_hdl = zpool_handle(zhp)) == NULL)
 438                 return (-1);
 439
 440         return (0);
 441 }
 442
 443 zfs_handle_t *
 444 make_dataset_handle(libzfs_handle_t *hdl, const char *path)
 445 {
 446         zfs_cmd_t zc = { 0 };
 447
 448         zfs_handle_t *zhp = calloc(sizeof (zfs_handle_t), 1);
 449
 450         if (zhp == NULL)
 451                 return (NULL);
 452
 453         zhp->zfs_hdl = hdl;
 454         (void) strlcpy(zhp->zfs_name, path, sizeof (zhp->zfs_name));
 455         if (zcmd_alloc_dst_nvlist(hdl, &zc, 0) != 0) {
 456                 free(zhp);
 457                 return (NULL);
 458         }
 459         if (get_stats_ioctl(zhp, &zc) == -1) {
 460                 zcmd_free_nvlists(&zc);
 461                 free(zhp);
 462                 return (NULL);
 463         }
 464         if (make_dataset_handle_common(zhp, &zc) == -1) {
 465                 free(zhp);
 466                 zhp = NULL;
 467         }
 468         zcmd_free_nvlists(&zc);
 469         return (zhp);
 470 }
 471
 472 zfs_handle_t *
 473 make_dataset_handle_zc(libzfs_handle_t *hdl, zfs_cmd_t *zc)
 474 {
 475         zfs_handle_t *zhp = calloc(sizeof (zfs_handle_t), 1);
 476
 477         if (zhp == NULL)
 478                 return (NULL);
 479
 480         zhp->zfs_hdl = hdl;
 481         (void) strlcpy(zhp->zfs_name, zc->zc_name, sizeof (zhp->zfs_name));
 482         if (make_dataset_handle_common(zhp, zc) == -1) {
 483                 free(zhp);
 484                 return (NULL);
 485         }
 486         return (zhp);
 487 }
 488
 489 zfs_handle_t *
 490 make_dataset_simple_handle_zc(zfs_handle_t *pzhp, zfs_cmd_t *zc)
 491 {
 492         zfs_handle_t *zhp = calloc(sizeof (zfs_handle_t), 1);
 493
 494         if (zhp == NULL)
 495                 return (NULL);
 496
 497         zhp->zfs_hdl = pzhp->zfs_hdl;
 498         (void) strlcpy(zhp->zfs_name, zc->zc_name, sizeof (zhp->zfs_name));
 499         zhp->zfs_head_type = pzhp->zfs_type;
 500         zhp->zfs_type = ZFS_TYPE_SNAPSHOT;
 501         zhp->zpool_hdl = zpool_handle(zhp);
 502         return (zhp);
 503 }
 504
 505 zfs_handle_t *
 506 zfs_handle_dup(zfs_handle_t *zhp_orig)
 507 {
 508         zfs_handle_t *zhp = calloc(sizeof (zfs_handle_t), 1);
 509
 510         if (zhp == NULL)
 511                 return (NULL);
 512
 513         zhp->zfs_hdl = zhp_orig->zfs_hdl;
 514         zhp->zpool_hdl = zhp_orig->zpool_hdl;
 515         (void) strlcpy(zhp->zfs_name, zhp_orig->zfs_name,
 516             sizeof (zhp->zfs_name));
 517         zhp->zfs_type = zhp_orig->zfs_type;
 518         zhp->zfs_head_type = zhp_orig->zfs_head_type;
 519         zhp->zfs_dmustats = zhp_orig->zfs_dmustats;
 520         if (zhp_orig->zfs_props != NULL) {
 521                 if (nvlist_dup(zhp_orig->zfs_props, &zhp->zfs_props, 0) != 0) {
 522                         (void) no_memory(zhp->zfs_hdl);
 523                         zfs_close(zhp);
 524                         return (NULL);
 525                 }
 526         }
 527         if (zhp_orig->zfs_user_props != NULL) {
 528                 if (nvlist_dup(zhp_orig->zfs_user_props,
 529                     &zhp->zfs_user_props, 0) != 0) {
 530                         (void) no_memory(zhp->zfs_hdl);
 531                         zfs_close(zhp);
 532                         return (NULL);
 533                 }
 534         }
 535         if (zhp_orig->zfs_recvd_props != NULL) {
 536                 if (nvlist_dup(zhp_orig->zfs_recvd_props,
 537                     &zhp->zfs_recvd_props, 0)) {
 538                         (void) no_memory(zhp->zfs_hdl);
 539                         zfs_close(zhp);
 540                         return (NULL);
 541                 }
 542         }
 543         zhp->zfs_mntcheck = zhp_orig->zfs_mntcheck;
 544         if (zhp_orig->zfs_mntopts != NULL) {
 545                 zhp->zfs_mntopts = zfs_strdup(zhp_orig->zfs_hdl,
 546                     zhp_orig->zfs_mntopts);
 547         }
 548         zhp->zfs_props_table = zhp_orig->zfs_props_table;
 549         return (zhp);
 550 }
 551
 552 boolean_t
 553 zfs_bookmark_exists(const char *path)
 554 {
 555         nvlist_t *bmarks;
 556         nvlist_t *props;
 557         char fsname[ZFS_MAXNAMELEN];
 558         char *bmark_name;
 559         char *pound;
 560         int err;
 561         boolean_t rv;
 562
 563
 564         (void) strlcpy(fsname, path, sizeof (fsname));
 565         pound = strchr(fsname, '#');
 566         if (pound == NULL)
 567                 return (B_FALSE);
 568
 569         *pound = '\0';
 570         bmark_name = pound + 1;
 571         props = fnvlist_alloc();
 572         err = lzc_get_bookmarks(fsname, props, &bmarks);
 573         nvlist_free(props);
 574         if (err != 0) {
 575                 nvlist_free(bmarks);
 576                 return (B_FALSE);
 577         }
 578
 579         rv = nvlist_exists(bmarks, bmark_name);
 580         nvlist_free(bmarks);
 581         return (rv);
 582 }
 583
 584 zfs_handle_t *
 585 make_bookmark_handle(zfs_handle_t *parent, const char *path,
 586     nvlist_t *bmark_props)
 587 {
 588         zfs_handle_t *zhp = calloc(sizeof (zfs_handle_t), 1);
 589
 590         if (zhp == NULL)
 591                 return (NULL);
 592
 593         /* Fill in the name. */
 594         zhp->zfs_hdl = parent->zfs_hdl;
 595         (void) strlcpy(zhp->zfs_name, path, sizeof (zhp->zfs_name));
 596
 597         /* Set the property lists. */
 598         if (nvlist_dup(bmark_props, &zhp->zfs_props, 0) != 0) {
 599                 free(zhp);
 600                 return (NULL);
 601         }
 602
 603         /* Set the types. */
 604         zhp->zfs_head_type = parent->zfs_head_type;
 605         zhp->zfs_type = ZFS_TYPE_BOOKMARK;
 606
 607         if ((zhp->zpool_hdl = zpool_handle(zhp)) == NULL) {
 608                 nvlist_free(zhp->zfs_props);
 609                 free(zhp);
 610                 return (NULL);
 611         }
 612
 613         return (zhp);
 614 }
 615
 616 /*
 617  * Opens the given snapshot, filesystem, or volume.   The 'types'
 618  * argument is a mask of acceptable types.  The function will print an
 619  * appropriate error message and return NULL if it can't be opened.
 620  */
 621 zfs_handle_t *
 622 zfs_open(libzfs_handle_t *hdl, const char *path, int types)
 623 {
 624         zfs_handle_t *zhp;
 625         char errbuf[1024];
 626
 627         (void) snprintf(errbuf, sizeof (errbuf),
 628             dgettext(TEXT_DOMAIN, "cannot open '%s'"), path);
 629
 630         /*
 631          * Validate the name before we even try to open it.
 632          */
 633         if (!zfs_validate_name(hdl, path, ZFS_TYPE_DATASET, B_FALSE)) {
 634                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 635                     "invalid dataset name"));
 636                 (void) zfs_error(hdl, EZFS_INVALIDNAME, errbuf);
 637                 return (NULL);
 638         }
 639
 640         /*
 641          * Try to get stats for the dataset, which will tell us if it exists.
 642          */
 643         errno = 0;
 644         if ((zhp = make_dataset_handle(hdl, path)) == NULL) {
 645                 (void) zfs_standard_error(hdl, errno, errbuf);
 646                 return (NULL);
 647         }
 648
 649         if (zhp == NULL) {
 650                 char *at = strchr(path, '@');
 651
 652                 if (at != NULL)
 653                         *at = '\0';
 654                 errno = 0;
 655                 if ((zhp = make_dataset_handle(hdl, path)) == NULL) {
 656                         (void) zfs_standard_error(hdl, errno, errbuf);
 657                         return (NULL);
 658                 }
 659                 if (at != NULL)
 660                         *at = '@';
 661                 (void) strlcpy(zhp->zfs_name, path, sizeof (zhp->zfs_name));
 662                 zhp->zfs_type = ZFS_TYPE_SNAPSHOT;
 663         }
 664
 665         if (!(types & zhp->zfs_type)) {
 666                 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf);
 667                 zfs_close(zhp);
 668                 return (NULL);
 669         }
 670
 671         return (zhp);
 672 }
 673
 674 /*
 675  * Release a ZFS handle.  Nothing to do but free the associated memory.
 676  */
 677 void
 678 zfs_close(zfs_handle_t *zhp)
 679 {
 680         if (zhp->zfs_mntopts)
 681                 free(zhp->zfs_mntopts);
 682         nvlist_free(zhp->zfs_props);
 683         nvlist_free(zhp->zfs_user_props);
 684         nvlist_free(zhp->zfs_recvd_props);
 685         free(zhp);
 686 }
 687
 688 typedef struct mnttab_node {
 689         struct mnttab mtn_mt;
 690         avl_node_t mtn_node;
 691 } mnttab_node_t;
 692
 693 static int
 694 libzfs_mnttab_cache_compare(const void *arg1, const void *arg2)
 695 {
 696         const mnttab_node_t *mtn1 = arg1;
 697         const mnttab_node_t *mtn2 = arg2;
 698         int rv;
 699
 700         rv = strcmp(mtn1->mtn_mt.mnt_special, mtn2->mtn_mt.mnt_special);
 701
 702         if (rv == 0)
 703                 return (0);
 704         return (rv > 0 ? 1 : -1);
 705 }
 706
 707 void
 708 libzfs_mnttab_init(libzfs_handle_t *hdl)
 709 {
 710         assert(avl_numnodes(&hdl->libzfs_mnttab_cache) == 0);
 711         avl_create(&hdl->libzfs_mnttab_cache, libzfs_mnttab_cache_compare,
 712             sizeof (mnttab_node_t), offsetof(mnttab_node_t, mtn_node));
 713 }
 714
 715 void
 716 libzfs_mnttab_update(libzfs_handle_t *hdl)
 717 {
 718         struct mnttab entry;
 719
 720         rewind(hdl->libzfs_mnttab);
 721         while (getmntent(hdl->libzfs_mnttab, &entry) == 0) {
 722                 mnttab_node_t *mtn;
 723
 724                 if (strcmp(entry.mnt_fstype, MNTTYPE_ZFS) != 0)
 725                         continue;
 726                 mtn = zfs_alloc(hdl, sizeof (mnttab_node_t));
 727                 mtn->mtn_mt.mnt_special = zfs_strdup(hdl, entry.mnt_special);
 728                 mtn->mtn_mt.mnt_mountp = zfs_strdup(hdl, entry.mnt_mountp);
 729                 mtn->mtn_mt.mnt_fstype = zfs_strdup(hdl, entry.mnt_fstype);
 730                 mtn->mtn_mt.mnt_mntopts = zfs_strdup(hdl, entry.mnt_mntopts);
 731                 avl_add(&hdl->libzfs_mnttab_cache, mtn);
 732         }
 733 }
 734
 735 void
 736 libzfs_mnttab_fini(libzfs_handle_t *hdl)
 737 {
 738         void *cookie = NULL;
 739         mnttab_node_t *mtn;
 740
 741         while ((mtn = avl_destroy_nodes(&hdl->libzfs_mnttab_cache, &cookie))
 742             != NULL) {
 743                 free(mtn->mtn_mt.mnt_special);
 744                 free(mtn->mtn_mt.mnt_mountp);
 745                 free(mtn->mtn_mt.mnt_fstype);
 746                 free(mtn->mtn_mt.mnt_mntopts);
 747                 free(mtn);
 748         }
 749         avl_destroy(&hdl->libzfs_mnttab_cache);
 750 }
 751
 752 void
 753 libzfs_mnttab_cache(libzfs_handle_t *hdl, boolean_t enable)
 754 {
 755         hdl->libzfs_mnttab_enable = enable;
 756 }
 757
 758 int
 759 libzfs_mnttab_find(libzfs_handle_t *hdl, const char *fsname,
 760     struct mnttab *entry)
 761 {
 762         mnttab_node_t find;
 763         mnttab_node_t *mtn;
 764
 765         if (!hdl->libzfs_mnttab_enable) {
 766                 struct mnttab srch = { 0 };
 767
 768                 if (avl_numnodes(&hdl->libzfs_mnttab_cache))
 769                         libzfs_mnttab_fini(hdl);
 770                 rewind(hdl->libzfs_mnttab);
 771                 srch.mnt_special = (char *)fsname;
 772                 srch.mnt_fstype = MNTTYPE_ZFS;
 773                 if (getmntany(hdl->libzfs_mnttab, entry, &srch) == 0)
 774                         return (0);
 775                 else
 776                         return (ENOENT);
 777         }
 778
 779         if (avl_numnodes(&hdl->libzfs_mnttab_cache) == 0)
 780                 libzfs_mnttab_update(hdl);
 781
 782         find.mtn_mt.mnt_special = (char *)fsname;
 783         mtn = avl_find(&hdl->libzfs_mnttab_cache, &find, NULL);
 784         if (mtn) {
 785                 *entry = mtn->mtn_mt;
 786                 return (0);
 787         }
 788         return (ENOENT);
 789 }
 790
 791 void
 792 libzfs_mnttab_add(libzfs_handle_t *hdl, const char *special,
 793     const char *mountp, const char *mntopts)
 794 {
 795         mnttab_node_t *mtn;
 796
 797         if (avl_numnodes(&hdl->libzfs_mnttab_cache) == 0)
 798                 return;
 799         mtn = zfs_alloc(hdl, sizeof (mnttab_node_t));
 800         mtn->mtn_mt.mnt_special = zfs_strdup(hdl, special);
 801         mtn->mtn_mt.mnt_mountp = zfs_strdup(hdl, mountp);
 802         mtn->mtn_mt.mnt_fstype = zfs_strdup(hdl, MNTTYPE_ZFS);
 803         mtn->mtn_mt.mnt_mntopts = zfs_strdup(hdl, mntopts);
 804         avl_add(&hdl->libzfs_mnttab_cache, mtn);
 805 }
 806
 807 void
 808 libzfs_mnttab_remove(libzfs_handle_t *hdl, const char *fsname)
 809 {
 810         mnttab_node_t find;
 811         mnttab_node_t *ret;
 812
 813         find.mtn_mt.mnt_special = (char *)fsname;
 814         if ((ret = avl_find(&hdl->libzfs_mnttab_cache, (void *)&find, NULL))
 815             != NULL) {
 816                 avl_remove(&hdl->libzfs_mnttab_cache, ret);
 817                 free(ret->mtn_mt.mnt_special);
 818                 free(ret->mtn_mt.mnt_mountp);
 819                 free(ret->mtn_mt.mnt_fstype);
 820                 free(ret->mtn_mt.mnt_mntopts);
 821                 free(ret);
 822         }
 823 }
 824
 825 int
 826 zfs_spa_version(zfs_handle_t *zhp, int *spa_version)
 827 {
 828         zpool_handle_t *zpool_handle = zhp->zpool_hdl;
 829
 830         if (zpool_handle == NULL)
 831                 return (-1);
 832
 833         *spa_version = zpool_get_prop_int(zpool_handle,
 834             ZPOOL_PROP_VERSION, NULL);
 835         return (0);
 836 }
 837
 838 /*
 839  * The choice of reservation property depends on the SPA version.
 840  */
 841 static int
 842 zfs_which_resv_prop(zfs_handle_t *zhp, zfs_prop_t *resv_prop)
 843 {
 844         int spa_version;
 845
 846         if (zfs_spa_version(zhp, &spa_version) < 0)
 847                 return (-1);
 848
 849         if (spa_version >= SPA_VERSION_REFRESERVATION)
 850                 *resv_prop = ZFS_PROP_REFRESERVATION;
 851         else
 852                 *resv_prop = ZFS_PROP_RESERVATION;
 853
 854         return (0);
 855 }
 856
 857 /*
 858  * Given an nvlist of properties to set, validates that they are correct, and
 859  * parses any numeric properties (index, boolean, etc) if they are specified as
 860  * strings.
 861  */
 862 nvlist_t *
 863 zfs_valid_proplist(libzfs_handle_t *hdl, zfs_type_t type, nvlist_t *nvl,
 864     uint64_t zoned, zfs_handle_t *zhp, zpool_handle_t *zpool_hdl,
 865     const char *errbuf)
 866 {
 867         nvpair_t *elem;
 868         uint64_t intval;
 869         char *strval;
 870         zfs_prop_t prop;
 871         nvlist_t *ret;
 872         int chosen_normal = -1;
 873         int chosen_utf = -1;
 874
 875         if (nvlist_alloc(&ret, NV_UNIQUE_NAME, 0) != 0) {
 876                 (void) no_memory(hdl);
 877                 return (NULL);
 878         }
 879
 880         /*
 881          * Make sure this property is valid and applies to this type.
 882          */
 883
 884         elem = NULL;
 885         while ((elem = nvlist_next_nvpair(nvl, elem)) != NULL) {
 886                 const char *propname = nvpair_name(elem);
 887
 888                 prop = zfs_name_to_prop(propname);
 889                 if (prop == ZPROP_INVAL && zfs_prop_user(propname)) {
 890                         /*
 891                          * This is a user property: make sure it's a
 892                          * string, and that it's less than ZAP_MAXNAMELEN.
 893                          */
 894                         if (nvpair_type(elem) != DATA_TYPE_STRING) {
 895                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 896                                     "'%s' must be a string"), propname);
 897                                 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
 898                                 goto error;
 899                         }
 900
 901                         if (strlen(nvpair_name(elem)) >= ZAP_MAXNAMELEN) {
 902                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 903                                     "property name '%s' is too long"),
 904                                     propname);
 905                                 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
 906                                 goto error;
 907                         }
 908
 909                         (void) nvpair_value_string(elem, &strval);
 910                         if (nvlist_add_string(ret, propname, strval) != 0) {
 911                                 (void) no_memory(hdl);
 912                                 goto error;
 913                         }
 914                         continue;
 915                 }
 916
 917                 /*
 918                  * Currently, only user properties can be modified on
 919                  * snapshots.
 920                  */
 921                 if (type == ZFS_TYPE_SNAPSHOT) {
 922                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 923                             "this property can not be modified for snapshots"));
 924                         (void) zfs_error(hdl, EZFS_PROPTYPE, errbuf);
 925                         goto error;
 926                 }
 927
 928                 if (prop == ZPROP_INVAL && zfs_prop_userquota(propname)) {
 929                         zfs_userquota_prop_t uqtype;
 930                         char newpropname[128];
 931                         char domain[128];
 932                         uint64_t rid;
 933                         uint64_t valary[3];
 934
 935                         if (userquota_propname_decode(propname, zoned,
 936                             &uqtype, domain, sizeof (domain), &rid) != 0) {
 937                                 zfs_error_aux(hdl,
 938                                     dgettext(TEXT_DOMAIN,
 939                                     "'%s' has an invalid user/group name"),
 940                                     propname);
 941                                 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
 942                                 goto error;
 943                         }
 944
 945                         if (uqtype != ZFS_PROP_USERQUOTA &&
 946                             uqtype != ZFS_PROP_GROUPQUOTA) {
 947                                 zfs_error_aux(hdl,
 948                                     dgettext(TEXT_DOMAIN, "'%s' is readonly"),
 949                                     propname);
 950                                 (void) zfs_error(hdl, EZFS_PROPREADONLY,
 951                                     errbuf);
 952                                 goto error;
 953                         }
 954
 955                         if (nvpair_type(elem) == DATA_TYPE_STRING) {
 956                                 (void) nvpair_value_string(elem, &strval);
 957                                 if (strcmp(strval, "none") == 0) {
 958                                         intval = 0;
 959                                 } else if (zfs_nicestrtonum(hdl,
 960                                     strval, &intval) != 0) {
 961                                         (void) zfs_error(hdl,
 962                                             EZFS_BADPROP, errbuf);
 963                                         goto error;
 964                                 }
 965                         } else if (nvpair_type(elem) ==
 966                             DATA_TYPE_UINT64) {
 967                                 (void) nvpair_value_uint64(elem, &intval);
 968                                 if (intval == 0) {
 969                                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 970                                             "use 'none' to disable "
 971                                             "userquota/groupquota"));
 972                                         goto error;
 973                                 }
 974                         } else {
 975                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 976                                     "'%s' must be a number"), propname);
 977                                 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
 978                                 goto error;
 979                         }
 980
 981                         /*
 982                          * Encode the prop name as
 983                          * userquota@<hex-rid>-domain, to make it easy
 984                          * for the kernel to decode.
 985                          */
 986                         (void) snprintf(newpropname, sizeof (newpropname),
 987                             "%s%llx-%s", zfs_userquota_prop_prefixes[uqtype],
 988                             (longlong_t)rid, domain);
 989                         valary[0] = uqtype;
 990                         valary[1] = rid;
 991                         valary[2] = intval;
 992                         if (nvlist_add_uint64_array(ret, newpropname,
 993                             valary, 3) != 0) {
 994                                 (void) no_memory(hdl);
 995                                 goto error;
 996                         }
 997                         continue;
 998                 } else if (prop == ZPROP_INVAL && zfs_prop_written(propname)) {
 999                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1000                             "'%s' is readonly"),
1001                             propname);
1002                         (void) zfs_error(hdl, EZFS_PROPREADONLY, errbuf);
1003                         goto error;
1004                 }
1005
1006                 if (prop == ZPROP_INVAL) {
1007                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1008                             "invalid property '%s'"), propname);
1009                         (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1010                         goto error;
1011                 }
1012
1013                 if (!zfs_prop_valid_for_type(prop, type)) {
1014                         zfs_error_aux(hdl,
1015                             dgettext(TEXT_DOMAIN, "'%s' does not "
1016                             "apply to datasets of this type"), propname);
1017                         (void) zfs_error(hdl, EZFS_PROPTYPE, errbuf);
1018                         goto error;
1019                 }
1020
1021                 if (zfs_prop_readonly(prop) &&
1022                     (!zfs_prop_setonce(prop) || zhp != NULL)) {
1023                         zfs_error_aux(hdl,
1024                             dgettext(TEXT_DOMAIN, "'%s' is readonly"),
1025                             propname);
1026                         (void) zfs_error(hdl, EZFS_PROPREADONLY, errbuf);
1027                         goto error;
1028                 }
1029
1030                 if (zprop_parse_value(hdl, elem, prop, type, ret,
1031                     &strval, &intval, errbuf) != 0)
1032                         goto error;
1033
1034                 /*
1035                  * Perform some additional checks for specific properties.
1036                  */
1037                 switch (prop) {
1038                 case ZFS_PROP_VERSION:
1039                 {
1040                         int version;
1041
1042                         if (zhp == NULL)
1043                                 break;
1044                         version = zfs_prop_get_int(zhp, ZFS_PROP_VERSION);
1045                         if (intval < version) {
1046                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1047                                     "Can not downgrade; already at version %u"),
1048                                     version);
1049                                 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1050                                 goto error;
1051                         }
1052                         break;
1053                 }
1054
1055                 case ZFS_PROP_VOLBLOCKSIZE:
1056                 case ZFS_PROP_RECORDSIZE:
1057                 {
1058                         int maxbs = SPA_MAXBLOCKSIZE;
1059                         if (zpool_hdl != NULL) {
1060                                 maxbs = zpool_get_prop_int(zpool_hdl,
1061                                     ZPOOL_PROP_MAXBLOCKSIZE, NULL);
1062                         }
1063                         /*
1064                          * Volumes are limited to a volblocksize of 128KB,
1065                          * because they typically service workloads with
1066                          * small random writes, which incur a large performance
1067                          * penalty with large blocks.
1068                          */
1069                         if (prop == ZFS_PROP_VOLBLOCKSIZE)
1070                                 maxbs = SPA_OLD_MAXBLOCKSIZE;
1071                         /*
1072                          * The value must be a power of two between
1073                          * SPA_MINBLOCKSIZE and maxbs.
1074                          */
1075                         if (intval < SPA_MINBLOCKSIZE ||
1076                             intval > maxbs || !ISP2(intval)) {
1077                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1078                                     "'%s' must be power of 2 from 512B "
1079                                     "to %uKB"), propname, maxbs >> 10);
1080                                 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1081                                 goto error;
1082                         }
1083                         break;
1084                 }
1085                 case ZFS_PROP_MLSLABEL:
1086                 {
1087 #ifdef illumos
1088                         /*
1089                          * Verify the mlslabel string and convert to
1090                          * internal hex label string.
1091                          */
1092
1093                         m_label_t *new_sl;
1094                         char *hex = NULL;       /* internal label string */
1095
1096                         /* Default value is already OK. */
1097                         if (strcasecmp(strval, ZFS_MLSLABEL_DEFAULT) == 0)
1098                                 break;
1099
1100                         /* Verify the label can be converted to binary form */
1101                         if (((new_sl = m_label_alloc(MAC_LABEL)) == NULL) ||
1102                             (str_to_label(strval, &new_sl, MAC_LABEL,
1103                             L_NO_CORRECTION, NULL) == -1)) {
1104                                 goto badlabel;
1105                         }
1106
1107                         /* Now translate to hex internal label string */
1108                         if (label_to_str(new_sl, &hex, M_INTERNAL,
1109                             DEF_NAMES) != 0) {
1110                                 if (hex)
1111                                         free(hex);
1112                                 goto badlabel;
1113                         }
1114                         m_label_free(new_sl);
1115
1116                         /* If string is already in internal form, we're done. */
1117                         if (strcmp(strval, hex) == 0) {
1118                                 free(hex);
1119                                 break;
1120                         }
1121
1122                         /* Replace the label string with the internal form. */
1123                         (void) nvlist_remove(ret, zfs_prop_to_name(prop),
1124                             DATA_TYPE_STRING);
1125                         verify(nvlist_add_string(ret, zfs_prop_to_name(prop),
1126                             hex) == 0);
1127                         free(hex);
1128
1129                         break;
1130
1131 badlabel:
1132                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1133                             "invalid mlslabel '%s'"), strval);
1134                         (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1135                         m_label_free(new_sl);   /* OK if null */
1136 #else   /* !illumos */
1137                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1138                             "mlslabel is not supported on FreeBSD"));
1139                         (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1140 #endif  /* illumos */
1141                         goto error;
1142
1143                 }
1144
1145                 case ZFS_PROP_MOUNTPOINT:
1146                 {
1147                         namecheck_err_t why;
1148
1149                         if (strcmp(strval, ZFS_MOUNTPOINT_NONE) == 0 ||
1150                             strcmp(strval, ZFS_MOUNTPOINT_LEGACY) == 0)
1151                                 break;
1152
1153                         if (mountpoint_namecheck(strval, &why)) {
1154                                 switch (why) {
1155                                 case NAME_ERR_LEADING_SLASH:
1156                                         zfs_error_aux(hdl,
1157                                             dgettext(TEXT_DOMAIN,
1158                                             "'%s' must be an absolute path, "
1159                                             "'none', or 'legacy'"), propname);
1160                                         break;
1161                                 case NAME_ERR_TOOLONG:
1162                                         zfs_error_aux(hdl,
1163                                             dgettext(TEXT_DOMAIN,
1164                                             "component of '%s' is too long"),
1165                                             propname);
1166                                         break;
1167
1168                                 default:
1169                                         zfs_error_aux(hdl,
1170                                             dgettext(TEXT_DOMAIN,
1171                                             "(%d) not defined"),
1172                                             why);
1173                                         break;
1174                                 }
1175                                 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1176                                 goto error;
1177                         }
1178                 }
1179
1180                         /*FALLTHRU*/
1181
1182                 case ZFS_PROP_SHARESMB:
1183                 case ZFS_PROP_SHARENFS:
1184                         /*
1185                          * For the mountpoint and sharenfs or sharesmb
1186                          * properties, check if it can be set in a
1187                          * global/non-global zone based on
1188                          * the zoned property value:
1189                          *
1190                          *              global zone         non-global zone
1191                          * --------------------------------------------------
1192                          * zoned=on     mountpoint (no)     mountpoint (yes)
1193                          *              sharenfs (no)       sharenfs (no)
1194                          *              sharesmb (no)       sharesmb (no)
1195                          *
1196                          * zoned=off    mountpoint (yes)        N/A
1197                          *              sharenfs (yes)
1198                          *              sharesmb (yes)
1199                          */
1200                         if (zoned) {
1201                                 if (getzoneid() == GLOBAL_ZONEID) {
1202                                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1203                                             "'%s' cannot be set on "
1204                                             "dataset in a non-global zone"),
1205                                             propname);
1206                                         (void) zfs_error(hdl, EZFS_ZONED,
1207                                             errbuf);
1208                                         goto error;
1209                                 } else if (prop == ZFS_PROP_SHARENFS ||
1210                                     prop == ZFS_PROP_SHARESMB) {
1211                                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1212                                             "'%s' cannot be set in "
1213                                             "a non-global zone"), propname);
1214                                         (void) zfs_error(hdl, EZFS_ZONED,
1215                                             errbuf);
1216                                         goto error;
1217                                 }
1218                         } else if (getzoneid() != GLOBAL_ZONEID) {
1219                                 /*
1220                                  * If zoned property is 'off', this must be in
1221                                  * a global zone. If not, something is wrong.
1222                                  */
1223                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1224                                     "'%s' cannot be set while dataset "
1225                                     "'zoned' property is set"), propname);
1226                                 (void) zfs_error(hdl, EZFS_ZONED, errbuf);
1227                                 goto error;
1228                         }
1229
1230                         /*
1231                          * At this point, it is legitimate to set the
1232                          * property. Now we want to make sure that the
1233                          * property value is valid if it is sharenfs.
1234                          */
1235                         if ((prop == ZFS_PROP_SHARENFS ||
1236                             prop == ZFS_PROP_SHARESMB) &&
1237                             strcmp(strval, "on") != 0 &&
1238                             strcmp(strval, "off") != 0) {
1239                                 zfs_share_proto_t proto;
1240
1241                                 if (prop == ZFS_PROP_SHARESMB)
1242                                         proto = PROTO_SMB;
1243                                 else
1244                                         proto = PROTO_NFS;
1245
1246                                 /*
1247                                  * Must be an valid sharing protocol
1248                                  * option string so init the libshare
1249                                  * in order to enable the parser and
1250                                  * then parse the options. We use the
1251                                  * control API since we don't care about
1252                                  * the current configuration and don't
1253                                  * want the overhead of loading it
1254                                  * until we actually do something.
1255                                  */
1256
1257                                 if (zfs_init_libshare(hdl,
1258                                     SA_INIT_CONTROL_API) != SA_OK) {
1259                                         /*
1260                                          * An error occurred so we can't do
1261                                          * anything
1262                                          */
1263                                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1264                                             "'%s' cannot be set: problem "
1265                                             "in share initialization"),
1266                                             propname);
1267                                         (void) zfs_error(hdl, EZFS_BADPROP,
1268                                             errbuf);
1269                                         goto error;
1270                                 }
1271
1272                                 if (zfs_parse_options(strval, proto) != SA_OK) {
1273                                         /*
1274                                          * There was an error in parsing so
1275                                          * deal with it by issuing an error
1276                                          * message and leaving after
1277                                          * uninitializing the the libshare
1278                                          * interface.
1279                                          */
1280                                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1281                                             "'%s' cannot be set to invalid "
1282                                             "options"), propname);
1283                                         (void) zfs_error(hdl, EZFS_BADPROP,
1284                                             errbuf);
1285                                         zfs_uninit_libshare(hdl);
1286                                         goto error;
1287                                 }
1288                                 zfs_uninit_libshare(hdl);
1289                         }
1290
1291                         break;
1292
1293                 case ZFS_PROP_UTF8ONLY:
1294                         chosen_utf = (int)intval;
1295                         break;
1296
1297                 case ZFS_PROP_NORMALIZE:
1298                         chosen_normal = (int)intval;
1299                         break;
1300
1301                 default:
1302                         break;
1303                 }
1304
1305                 /*
1306                  * For changes to existing volumes, we have some additional
1307                  * checks to enforce.
1308                  */
1309                 if (type == ZFS_TYPE_VOLUME && zhp != NULL) {
1310                         uint64_t volsize = zfs_prop_get_int(zhp,
1311                             ZFS_PROP_VOLSIZE);
1312                         uint64_t blocksize = zfs_prop_get_int(zhp,
1313                             ZFS_PROP_VOLBLOCKSIZE);
1314                         char buf[64];
1315
1316                         switch (prop) {
1317                         case ZFS_PROP_RESERVATION:
1318                         case ZFS_PROP_REFRESERVATION:
1319                                 if (intval > volsize) {
1320                                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1321                                             "'%s' is greater than current "
1322                                             "volume size"), propname);
1323                                         (void) zfs_error(hdl, EZFS_BADPROP,
1324                                             errbuf);
1325                                         goto error;
1326                                 }
1327                                 break;
1328
1329                         case ZFS_PROP_VOLSIZE:
1330                                 if (intval % blocksize != 0) {
1331                                         zfs_nicenum(blocksize, buf,
1332                                             sizeof (buf));
1333                                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1334                                             "'%s' must be a multiple of "
1335                                             "volume block size (%s)"),
1336                                             propname, buf);
1337                                         (void) zfs_error(hdl, EZFS_BADPROP,
1338                                             errbuf);
1339                                         goto error;
1340                                 }
1341
1342                                 if (intval == 0) {
1343                                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1344                                             "'%s' cannot be zero"),
1345                                             propname);
1346                                         (void) zfs_error(hdl, EZFS_BADPROP,
1347                                             errbuf);
1348                                         goto error;
1349                                 }
1350                                 break;
1351
1352                         default:
1353                                 break;
1354                         }
1355                 }
1356         }
1357
1358         /*
1359          * If normalization was chosen, but no UTF8 choice was made,
1360          * enforce rejection of non-UTF8 names.
1361          *
1362          * If normalization was chosen, but rejecting non-UTF8 names
1363          * was explicitly not chosen, it is an error.
1364          */
1365         if (chosen_normal > 0 && chosen_utf < 0) {
1366                 if (nvlist_add_uint64(ret,
1367                     zfs_prop_to_name(ZFS_PROP_UTF8ONLY), 1) != 0) {
1368                         (void) no_memory(hdl);
1369                         goto error;
1370                 }
1371         } else if (chosen_normal > 0 && chosen_utf == 0) {
1372                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1373                     "'%s' must be set 'on' if normalization chosen"),
1374                     zfs_prop_to_name(ZFS_PROP_UTF8ONLY));
1375                 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1376                 goto error;
1377         }
1378         return (ret);
1379
1380 error:
1381         nvlist_free(ret);
1382         return (NULL);
1383 }
1384
1385 int
1386 zfs_add_synthetic_resv(zfs_handle_t *zhp, nvlist_t *nvl)
1387 {
1388         uint64_t old_volsize;
1389         uint64_t new_volsize;
1390         uint64_t old_reservation;
1391         uint64_t new_reservation;
1392         zfs_prop_t resv_prop;
1393         nvlist_t *props;
1394
1395         /*
1396          * If this is an existing volume, and someone is setting the volsize,
1397          * make sure that it matches the reservation, or add it if necessary.
1398          */
1399         old_volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE);
1400         if (zfs_which_resv_prop(zhp, &resv_prop) < 0)
1401                 return (-1);
1402         old_reservation = zfs_prop_get_int(zhp, resv_prop);
1403
1404         props = fnvlist_alloc();
1405         fnvlist_add_uint64(props, zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE),
1406             zfs_prop_get_int(zhp, ZFS_PROP_VOLBLOCKSIZE));
1407
1408         if ((zvol_volsize_to_reservation(old_volsize, props) !=
1409             old_reservation) || nvlist_exists(nvl,
1410             zfs_prop_to_name(resv_prop))) {
1411                 fnvlist_free(props);
1412                 return (0);
1413         }
1414         if (nvlist_lookup_uint64(nvl, zfs_prop_to_name(ZFS_PROP_VOLSIZE),
1415             &new_volsize) != 0) {
1416                 fnvlist_free(props);
1417                 return (-1);
1418         }
1419         new_reservation = zvol_volsize_to_reservation(new_volsize, props);
1420         fnvlist_free(props);
1421
1422         if (nvlist_add_uint64(nvl, zfs_prop_to_name(resv_prop),
1423             new_reservation) != 0) {
1424                 (void) no_memory(zhp->zfs_hdl);
1425                 return (-1);
1426         }
1427         return (1);
1428 }
1429
1430 void
1431 zfs_setprop_error(libzfs_handle_t *hdl, zfs_prop_t prop, int err,
1432     char *errbuf)
1433 {
1434         switch (err) {
1435
1436         case ENOSPC:
1437                 /*
1438                  * For quotas and reservations, ENOSPC indicates
1439                  * something different; setting a quota or reservation
1440                  * doesn't use any disk space.
1441                  */
1442                 switch (prop) {
1443                 case ZFS_PROP_QUOTA:
1444                 case ZFS_PROP_REFQUOTA:
1445                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1446                             "size is less than current used or "
1447                             "reserved space"));
1448                         (void) zfs_error(hdl, EZFS_PROPSPACE, errbuf);
1449                         break;
1450
1451                 case ZFS_PROP_RESERVATION:
1452                 case ZFS_PROP_REFRESERVATION:
1453                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1454                             "size is greater than available space"));
1455                         (void) zfs_error(hdl, EZFS_PROPSPACE, errbuf);
1456                         break;
1457
1458                 default:
1459                         (void) zfs_standard_error(hdl, err, errbuf);
1460                         break;
1461                 }
1462                 break;
1463
1464         case EBUSY:
1465                 (void) zfs_standard_error(hdl, EBUSY, errbuf);
1466                 break;
1467
1468         case EROFS:
1469                 (void) zfs_error(hdl, EZFS_DSREADONLY, errbuf);
1470                 break;
1471
1472         case ENOTSUP:
1473                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1474                     "pool and or dataset must be upgraded to set this "
1475                     "property or value"));
1476                 (void) zfs_error(hdl, EZFS_BADVERSION, errbuf);
1477                 break;
1478
1479         case ERANGE:
1480         case EDOM:
1481                 if (prop == ZFS_PROP_COMPRESSION ||
1482                     prop == ZFS_PROP_RECORDSIZE) {
1483                         (void) zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1484                             "property setting is not allowed on "
1485                             "bootable datasets"));
1486                         (void) zfs_error(hdl, EZFS_NOTSUP, errbuf);
1487                 } else if (prop == ZFS_PROP_CHECKSUM ||
1488                     prop == ZFS_PROP_DEDUP) {
1489                         (void) zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1490                             "property setting is not allowed on "
1491                             "root pools"));
1492                         (void) zfs_error(hdl, EZFS_NOTSUP, errbuf);
1493                 } else {
1494                         (void) zfs_standard_error(hdl, err, errbuf);
1495                 }
1496                 break;
1497
1498         case EINVAL:
1499                 if (prop == ZPROP_INVAL) {
1500                         (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1501                 } else {
1502                         (void) zfs_standard_error(hdl, err, errbuf);
1503                 }
1504                 break;
1505
1506         case EOVERFLOW:
1507                 /*
1508                  * This platform can't address a volume this big.
1509                  */
1510 #ifdef _ILP32
1511                 if (prop == ZFS_PROP_VOLSIZE) {
1512                         (void) zfs_error(hdl, EZFS_VOLTOOBIG, errbuf);
1513                         break;
1514                 }
1515 #endif
1516                 /* FALLTHROUGH */
1517         default:
1518                 (void) zfs_standard_error(hdl, err, errbuf);
1519         }
1520 }
1521
1522 /*
1523  * Given a property name and value, set the property for the given dataset.
1524  */
1525 int
1526 zfs_prop_set(zfs_handle_t *zhp, const char *propname, const char *propval)
1527 {
1528         int ret = -1;
1529         char errbuf[1024];
1530         libzfs_handle_t *hdl = zhp->zfs_hdl;
1531         nvlist_t *nvl = NULL;
1532
1533         (void) snprintf(errbuf, sizeof (errbuf),
1534             dgettext(TEXT_DOMAIN, "cannot set property for '%s'"),
1535             zhp->zfs_name);
1536
1537         if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0) != 0 ||
1538             nvlist_add_string(nvl, propname, propval) != 0) {
1539                 (void) no_memory(hdl);
1540                 goto error;
1541         }
1542
1543         ret = zfs_prop_set_list(zhp, nvl);
1544
1545 error:
1546         nvlist_free(nvl);
1547         return (ret);
1548 }
1549
1550
1551
1552 /*
1553  * Given an nvlist of property names and values, set the properties for the
1554  * given dataset.
1555  */
1556 int
1557 zfs_prop_set_list(zfs_handle_t *zhp, nvlist_t *props)
1558 {
1559         zfs_cmd_t zc = { 0 };
1560         int ret = -1;
1561         prop_changelist_t **cls = NULL;
1562         int cl_idx;
1563         char errbuf[1024];
1564         libzfs_handle_t *hdl = zhp->zfs_hdl;
1565         nvlist_t *nvl;
1566         int nvl_len;
1567         int added_resv;
1568
1569         (void) snprintf(errbuf, sizeof (errbuf),
1570             dgettext(TEXT_DOMAIN, "cannot set property for '%s'"),
1571             zhp->zfs_name);
1572
1573         if ((nvl = zfs_valid_proplist(hdl, zhp->zfs_type, props,
1574             zfs_prop_get_int(zhp, ZFS_PROP_ZONED), zhp, zhp->zpool_hdl,
1575             errbuf)) == NULL)
1576                 goto error;
1577
1578         /*
1579          * We have to check for any extra properties which need to be added
1580          * before computing the length of the nvlist.
1581          */
1582         for (nvpair_t *elem = nvlist_next_nvpair(nvl, NULL);
1583             elem != NULL;
1584             elem = nvlist_next_nvpair(nvl, elem)) {
1585                 if (zfs_name_to_prop(nvpair_name(elem)) == ZFS_PROP_VOLSIZE &&
1586                     (added_resv = zfs_add_synthetic_resv(zhp, nvl)) == -1) {
1587                         goto error;
1588                 }
1589         }
1590         /*
1591          * Check how many properties we're setting and allocate an array to
1592          * store changelist pointers for postfix().
1593          */
1594         nvl_len = 0;
1595         for (nvpair_t *elem = nvlist_next_nvpair(nvl, NULL);
1596             elem != NULL;
1597             elem = nvlist_next_nvpair(nvl, elem))
1598                 nvl_len++;
1599         if ((cls = calloc(nvl_len, sizeof (prop_changelist_t *))) == NULL)
1600                 goto error;
1601
1602         cl_idx = 0;
1603         for (nvpair_t *elem = nvlist_next_nvpair(nvl, NULL);
1604             elem != NULL;
1605             elem = nvlist_next_nvpair(nvl, elem)) {
1606
1607                 zfs_prop_t prop = zfs_name_to_prop(nvpair_name(elem));
1608
1609                 assert(cl_idx < nvl_len);
1610                 /*
1611                  * We don't want to unmount & remount the dataset when changing
1612                  * its canmount property.  We only use the changelist logic to
1613                  * unmount when setting canmount=off for a mounted filesystem
1614                  * or when setting canmount=on for an unmounted filesystem.
1615                  * For all other changes to canmount property the filesystem
1616                  * remains the same.
1617                  */
1618                 if (prop != ZFS_PROP_CANMOUNT ||
1619                     (fnvpair_value_uint64(elem) == ZFS_CANMOUNT_OFF &&
1620                      zfs_is_mounted(zhp, NULL)) ||
1621                     (fnvpair_value_uint64(elem) == ZFS_CANMOUNT_ON &&
1622                      !zfs_is_mounted(zhp, NULL))) {
1623                         cls[cl_idx] = changelist_gather(zhp, prop, 0, 0);
1624                         if (cls[cl_idx] == NULL)
1625                                 goto error;
1626                 }
1627
1628                 if (prop == ZFS_PROP_MOUNTPOINT &&
1629                     changelist_haszonedchild(cls[cl_idx])) {
1630                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1631                             "child dataset with inherited mountpoint is used "
1632                             "in a non-global zone"));
1633                         ret = zfs_error(hdl, EZFS_ZONED, errbuf);
1634                         goto error;
1635                 }
1636
1637                 /* We don't support those properties on FreeBSD. */
1638                 switch (prop) {
1639                 case ZFS_PROP_DEVICES:
1640                 case ZFS_PROP_ISCSIOPTIONS:
1641                 case ZFS_PROP_XATTR:
1642                 case ZFS_PROP_VSCAN:
1643                 case ZFS_PROP_NBMAND:
1644                 case ZFS_PROP_MLSLABEL:
1645                         (void) snprintf(errbuf, sizeof (errbuf),
1646                             "property '%s' not supported on FreeBSD",
1647                             nvpair_name(elem));
1648                         ret = zfs_error(hdl, EZFS_PERM, errbuf);
1649                         goto error;
1650                 }
1651
1652                 if (cls[cl_idx] != NULL &&
1653                     (ret = changelist_prefix(cls[cl_idx])) != 0)
1654                         goto error;
1655
1656                 cl_idx++;
1657         }
1658         assert(cl_idx == nvl_len);
1659
1660         /*
1661          * Execute the corresponding ioctl() to set this list of properties.
1662          */
1663         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
1664
1665         if ((ret = zcmd_write_src_nvlist(hdl, &zc, nvl)) != 0 ||
1666             (ret = zcmd_alloc_dst_nvlist(hdl, &zc, 0)) != 0)
1667                 goto error;
1668
1669         ret = zfs_ioctl(hdl, ZFS_IOC_SET_PROP, &zc);
1670
1671         if (ret != 0) {
1672                 /* Get the list of unset properties back and report them. */
1673                 nvlist_t *errorprops = NULL;
1674                 if (zcmd_read_dst_nvlist(hdl, &zc, &errorprops) != 0)
1675                         goto error;
1676                 for (nvpair_t *elem = nvlist_next_nvpair(nvl, NULL);
1677                     elem != NULL;
1678                     elem = nvlist_next_nvpair(nvl, elem)) {
1679                         zfs_prop_t prop = zfs_name_to_prop(nvpair_name(elem));
1680                         zfs_setprop_error(hdl, prop, errno, errbuf);
1681                 }
1682                 nvlist_free(errorprops);
1683
1684                 if (added_resv && errno == ENOSPC) {
1685                         /* clean up the volsize property we tried to set */
1686                         uint64_t old_volsize = zfs_prop_get_int(zhp,
1687                             ZFS_PROP_VOLSIZE);
1688                         nvlist_free(nvl);
1689                         nvl = NULL;
1690                         zcmd_free_nvlists(&zc);
1691
1692                         if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0) != 0)
1693                                 goto error;
1694                         if (nvlist_add_uint64(nvl,
1695                             zfs_prop_to_name(ZFS_PROP_VOLSIZE),
1696                             old_volsize) != 0)
1697                                 goto error;
1698                         if (zcmd_write_src_nvlist(hdl, &zc, nvl) != 0)
1699                                 goto error;
1700                         (void) zfs_ioctl(hdl, ZFS_IOC_SET_PROP, &zc);
1701                 }
1702         } else {
1703                 for (cl_idx = 0; cl_idx < nvl_len; cl_idx++) {
1704                         if (cls[cl_idx] != NULL) {
1705                                 int clp_err = changelist_postfix(cls[cl_idx]);
1706                                 if (clp_err != 0)
1707                                         ret = clp_err;
1708                         }
1709                 }
1710
1711                 /*
1712                  * Refresh the statistics so the new property value
1713                  * is reflected.
1714                  */
1715                 if (ret == 0)
1716                         (void) get_stats(zhp);
1717         }
1718
1719 error:
1720         nvlist_free(nvl);
1721         zcmd_free_nvlists(&zc);
1722         if (cls != NULL) {
1723                 for (cl_idx = 0; cl_idx < nvl_len; cl_idx++) {
1724                         if (cls[cl_idx] != NULL)
1725                                 changelist_free(cls[cl_idx]);
1726                 }
1727                 free(cls);
1728         }
1729         return (ret);
1730 }
1731
1732 /*
1733  * Given a property, inherit the value from the parent dataset, or if received
1734  * is TRUE, revert to the received value, if any.
1735  */
1736 int
1737 zfs_prop_inherit(zfs_handle_t *zhp, const char *propname, boolean_t received)
1738 {
1739         zfs_cmd_t zc = { 0 };
1740         int ret;
1741         prop_changelist_t *cl;
1742         libzfs_handle_t *hdl = zhp->zfs_hdl;
1743         char errbuf[1024];
1744         zfs_prop_t prop;
1745
1746         (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
1747             "cannot inherit %s for '%s'"), propname, zhp->zfs_name);
1748
1749         zc.zc_cookie = received;
1750         if ((prop = zfs_name_to_prop(propname)) == ZPROP_INVAL) {
1751                 /*
1752                  * For user properties, the amount of work we have to do is very
1753                  * small, so just do it here.
1754                  */
1755                 if (!zfs_prop_user(propname)) {
1756                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1757                             "invalid property"));
1758                         return (zfs_error(hdl, EZFS_BADPROP, errbuf));
1759                 }
1760
1761                 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
1762                 (void) strlcpy(zc.zc_value, propname, sizeof (zc.zc_value));
1763
1764                 if (zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_INHERIT_PROP, &zc) != 0)
1765                         return (zfs_standard_error(hdl, errno, errbuf));
1766
1767                 return (0);
1768         }
1769
1770         /*
1771          * Verify that this property is inheritable.
1772          */
1773         if (zfs_prop_readonly(prop))
1774                 return (zfs_error(hdl, EZFS_PROPREADONLY, errbuf));
1775
1776         if (!zfs_prop_inheritable(prop) && !received)
1777                 return (zfs_error(hdl, EZFS_PROPNONINHERIT, errbuf));
1778
1779         /*
1780          * Check to see if the value applies to this type
1781          */
1782         if (!zfs_prop_valid_for_type(prop, zhp->zfs_type))
1783                 return (zfs_error(hdl, EZFS_PROPTYPE, errbuf));
1784
1785         /*
1786          * Normalize the name, to get rid of shorthand abbreviations.
1787          */
1788         propname = zfs_prop_to_name(prop);
1789         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
1790         (void) strlcpy(zc.zc_value, propname, sizeof (zc.zc_value));
1791
1792         if (prop == ZFS_PROP_MOUNTPOINT && getzoneid() == GLOBAL_ZONEID &&
1793             zfs_prop_get_int(zhp, ZFS_PROP_ZONED)) {
1794                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1795                     "dataset is used in a non-global zone"));
1796                 return (zfs_error(hdl, EZFS_ZONED, errbuf));
1797         }
1798
1799         /*
1800          * Determine datasets which will be affected by this change, if any.
1801          */
1802         if ((cl = changelist_gather(zhp, prop, 0, 0)) == NULL)
1803                 return (-1);
1804
1805         if (prop == ZFS_PROP_MOUNTPOINT && changelist_haszonedchild(cl)) {
1806                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1807                     "child dataset with inherited mountpoint is used "
1808                     "in a non-global zone"));
1809                 ret = zfs_error(hdl, EZFS_ZONED, errbuf);
1810                 goto error;
1811         }
1812
1813         if ((ret = changelist_prefix(cl)) != 0)
1814                 goto error;
1815
1816         if ((ret = zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_INHERIT_PROP, &zc)) != 0) {
1817                 return (zfs_standard_error(hdl, errno, errbuf));
1818         } else {
1819
1820                 if ((ret = changelist_postfix(cl)) != 0)
1821                         goto error;
1822
1823                 /*
1824                  * Refresh the statistics so the new property is reflected.
1825                  */
1826                 (void) get_stats(zhp);
1827         }
1828
1829 error:
1830         changelist_free(cl);
1831         return (ret);
1832 }
1833
1834 /*
1835  * True DSL properties are stored in an nvlist.  The following two functions
1836  * extract them appropriately.
1837  */
1838 static uint64_t
1839 getprop_uint64(zfs_handle_t *zhp, zfs_prop_t prop, char **source)
1840 {
1841         nvlist_t *nv;
1842         uint64_t value;
1843
1844         *source = NULL;
1845         if (nvlist_lookup_nvlist(zhp->zfs_props,
1846             zfs_prop_to_name(prop), &nv) == 0) {
1847                 verify(nvlist_lookup_uint64(nv, ZPROP_VALUE, &value) == 0);
1848                 (void) nvlist_lookup_string(nv, ZPROP_SOURCE, source);
1849         } else {
1850                 verify(!zhp->zfs_props_table ||
1851                     zhp->zfs_props_table[prop] == B_TRUE);
1852                 value = zfs_prop_default_numeric(prop);
1853                 *source = "";
1854         }
1855
1856         return (value);
1857 }
1858
1859 static const char *
1860 getprop_string(zfs_handle_t *zhp, zfs_prop_t prop, char **source)
1861 {
1862         nvlist_t *nv;
1863         const char *value;
1864
1865         *source = NULL;
1866         if (nvlist_lookup_nvlist(zhp->zfs_props,
1867             zfs_prop_to_name(prop), &nv) == 0) {
1868                 value = fnvlist_lookup_string(nv, ZPROP_VALUE);
1869                 (void) nvlist_lookup_string(nv, ZPROP_SOURCE, source);
1870         } else {
1871                 verify(!zhp->zfs_props_table ||
1872                     zhp->zfs_props_table[prop] == B_TRUE);
1873                 value = zfs_prop_default_string(prop);
1874                 *source = "";
1875         }
1876
1877         return (value);
1878 }
1879
1880 static boolean_t
1881 zfs_is_recvd_props_mode(zfs_handle_t *zhp)
1882 {
1883         return (zhp->zfs_props == zhp->zfs_recvd_props);
1884 }
1885
1886 static void
1887 zfs_set_recvd_props_mode(zfs_handle_t *zhp, uint64_t *cookie)
1888 {
1889         *cookie = (uint64_t)(uintptr_t)zhp->zfs_props;
1890         zhp->zfs_props = zhp->zfs_recvd_props;
1891 }
1892
1893 static void
1894 zfs_unset_recvd_props_mode(zfs_handle_t *zhp, uint64_t *cookie)
1895 {
1896         zhp->zfs_props = (nvlist_t *)(uintptr_t)*cookie;
1897         *cookie = 0;
1898 }
1899
1900 /*
1901  * Internal function for getting a numeric property.  Both zfs_prop_get() and
1902  * zfs_prop_get_int() are built using this interface.
1903  *
1904  * Certain properties can be overridden using 'mount -o'.  In this case, scan
1905  * the contents of the /etc/mnttab entry, searching for the appropriate options.
1906  * If they differ from the on-disk values, report the current values and mark
1907  * the source "temporary".
1908  */
1909 static int
1910 get_numeric_property(zfs_handle_t *zhp, zfs_prop_t prop, zprop_source_t *src,
1911     char **source, uint64_t *val)
1912 {
1913         zfs_cmd_t zc = { 0 };
1914         nvlist_t *zplprops = NULL;
1915         struct mnttab mnt;
1916         char *mntopt_on = NULL;
1917         char *mntopt_off = NULL;
1918         boolean_t received = zfs_is_recvd_props_mode(zhp);
1919
1920         *source = NULL;
1921
1922         switch (prop) {
1923         case ZFS_PROP_ATIME:
1924                 mntopt_on = MNTOPT_ATIME;
1925                 mntopt_off = MNTOPT_NOATIME;
1926                 break;
1927
1928         case ZFS_PROP_DEVICES:
1929                 mntopt_on = MNTOPT_DEVICES;
1930                 mntopt_off = MNTOPT_NODEVICES;
1931                 break;
1932
1933         case ZFS_PROP_EXEC:
1934                 mntopt_on = MNTOPT_EXEC;
1935                 mntopt_off = MNTOPT_NOEXEC;
1936                 break;
1937
1938         case ZFS_PROP_READONLY:
1939                 mntopt_on = MNTOPT_RO;
1940                 mntopt_off = MNTOPT_RW;
1941                 break;
1942
1943         case ZFS_PROP_SETUID:
1944                 mntopt_on = MNTOPT_SETUID;
1945                 mntopt_off = MNTOPT_NOSETUID;
1946                 break;
1947
1948         case ZFS_PROP_XATTR:
1949                 mntopt_on = MNTOPT_XATTR;
1950                 mntopt_off = MNTOPT_NOXATTR;
1951                 break;
1952
1953         case ZFS_PROP_NBMAND:
1954                 mntopt_on = MNTOPT_NBMAND;
1955                 mntopt_off = MNTOPT_NONBMAND;
1956                 break;
1957
1958         default:
1959                 break;
1960         }
1961
1962         /*
1963          * Because looking up the mount options is potentially expensive
1964          * (iterating over all of /etc/mnttab), we defer its calculation until
1965          * we're looking up a property which requires its presence.
1966          */
1967         if (!zhp->zfs_mntcheck &&
1968             (mntopt_on != NULL || prop == ZFS_PROP_MOUNTED)) {
1969                 libzfs_handle_t *hdl = zhp->zfs_hdl;
1970                 struct mnttab entry;
1971
1972                 if (libzfs_mnttab_find(hdl, zhp->zfs_name, &entry) == 0) {
1973                         zhp->zfs_mntopts = zfs_strdup(hdl,
1974                             entry.mnt_mntopts);
1975                         if (zhp->zfs_mntopts == NULL)
1976                                 return (-1);
1977                 }
1978
1979                 zhp->zfs_mntcheck = B_TRUE;
1980         }
1981
1982         if (zhp->zfs_mntopts == NULL)
1983                 mnt.mnt_mntopts = "";
1984         else
1985                 mnt.mnt_mntopts = zhp->zfs_mntopts;
1986
1987         switch (prop) {
1988         case ZFS_PROP_ATIME:
1989         case ZFS_PROP_DEVICES:
1990         case ZFS_PROP_EXEC:
1991         case ZFS_PROP_READONLY:
1992         case ZFS_PROP_SETUID:
1993         case ZFS_PROP_XATTR:
1994         case ZFS_PROP_NBMAND:
1995                 *val = getprop_uint64(zhp, prop, source);
1996
1997                 if (received)
1998                         break;
1999
2000                 if (hasmntopt(&mnt, mntopt_on) && !*val) {
2001                         *val = B_TRUE;
2002                         if (src)
2003                                 *src = ZPROP_SRC_TEMPORARY;
2004                 } else if (hasmntopt(&mnt, mntopt_off) && *val) {
2005                         *val = B_FALSE;
2006                         if (src)
2007                                 *src = ZPROP_SRC_TEMPORARY;
2008                 }
2009                 break;
2010
2011         case ZFS_PROP_CANMOUNT:
2012         case ZFS_PROP_VOLSIZE:
2013         case ZFS_PROP_QUOTA:
2014         case ZFS_PROP_REFQUOTA:
2015         case ZFS_PROP_RESERVATION:
2016         case ZFS_PROP_REFRESERVATION:
2017         case ZFS_PROP_FILESYSTEM_LIMIT:
2018         case ZFS_PROP_SNAPSHOT_LIMIT:
2019         case ZFS_PROP_FILESYSTEM_COUNT:
2020         case ZFS_PROP_SNAPSHOT_COUNT:
2021                 *val = getprop_uint64(zhp, prop, source);
2022
2023                 if (*source == NULL) {
2024                         /* not default, must be local */
2025                         *source = zhp->zfs_name;
2026                 }
2027                 break;
2028
2029         case ZFS_PROP_MOUNTED:
2030                 *val = (zhp->zfs_mntopts != NULL);
2031                 break;
2032
2033         case ZFS_PROP_NUMCLONES:
2034                 *val = zhp->zfs_dmustats.dds_num_clones;
2035                 break;
2036
2037         case ZFS_PROP_VERSION:
2038         case ZFS_PROP_NORMALIZE:
2039         case ZFS_PROP_UTF8ONLY:
2040         case ZFS_PROP_CASE:
2041                 if (!zfs_prop_valid_for_type(prop, zhp->zfs_head_type) ||
2042                     zcmd_alloc_dst_nvlist(zhp->zfs_hdl, &zc, 0) != 0)
2043                         return (-1);
2044                 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
2045                 if (zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_OBJSET_ZPLPROPS, &zc)) {
2046                         zcmd_free_nvlists(&zc);
2047                         return (-1);
2048                 }
2049                 if (zcmd_read_dst_nvlist(zhp->zfs_hdl, &zc, &zplprops) != 0 ||
2050                     nvlist_lookup_uint64(zplprops, zfs_prop_to_name(prop),
2051                     val) != 0) {
2052                         zcmd_free_nvlists(&zc);
2053                         return (-1);
2054                 }
2055                 nvlist_free(zplprops);
2056                 zcmd_free_nvlists(&zc);
2057                 break;
2058
2059         case ZFS_PROP_INCONSISTENT:
2060                 *val = zhp->zfs_dmustats.dds_inconsistent;
2061                 break;
2062
2063         default:
2064                 switch (zfs_prop_get_type(prop)) {
2065                 case PROP_TYPE_NUMBER:
2066                 case PROP_TYPE_INDEX:
2067                         *val = getprop_uint64(zhp, prop, source);
2068                         /*
2069                          * If we tried to use a default value for a
2070                          * readonly property, it means that it was not
2071                          * present.
2072                          */
2073                         if (zfs_prop_readonly(prop) &&
2074                             *source != NULL && (*source)[0] == '\0') {
2075                                 *source = NULL;
2076                         }
2077                         break;
2078
2079                 case PROP_TYPE_STRING:
2080                 default:
2081                         zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN,
2082                             "cannot get non-numeric property"));
2083                         return (zfs_error(zhp->zfs_hdl, EZFS_BADPROP,
2084                             dgettext(TEXT_DOMAIN, "internal error")));
2085                 }
2086         }
2087
2088         return (0);
2089 }
2090
2091 /*
2092  * Calculate the source type, given the raw source string.
2093  */
2094 static void
2095 get_source(zfs_handle_t *zhp, zprop_source_t *srctype, char *source,
2096     char *statbuf, size_t statlen)
2097 {
2098         if (statbuf == NULL || *srctype == ZPROP_SRC_TEMPORARY)
2099                 return;
2100
2101         if (source == NULL) {
2102                 *srctype = ZPROP_SRC_NONE;
2103         } else if (source[0] == '\0') {
2104                 *srctype = ZPROP_SRC_DEFAULT;
2105         } else if (strstr(source, ZPROP_SOURCE_VAL_RECVD) != NULL) {
2106                 *srctype = ZPROP_SRC_RECEIVED;
2107         } else {
2108                 if (strcmp(source, zhp->zfs_name) == 0) {
2109                         *srctype = ZPROP_SRC_LOCAL;
2110                 } else {
2111                         (void) strlcpy(statbuf, source, statlen);
2112                         *srctype = ZPROP_SRC_INHERITED;
2113                 }
2114         }
2115
2116 }
2117
2118 int
2119 zfs_prop_get_recvd(zfs_handle_t *zhp, const char *propname, char *propbuf,
2120     size_t proplen, boolean_t literal)
2121 {
2122         zfs_prop_t prop;
2123         int err = 0;
2124
2125         if (zhp->zfs_recvd_props == NULL)
2126                 if (get_recvd_props_ioctl(zhp) != 0)
2127                         return (-1);
2128
2129         prop = zfs_name_to_prop(propname);
2130
2131         if (prop != ZPROP_INVAL) {
2132                 uint64_t cookie;
2133                 if (!nvlist_exists(zhp->zfs_recvd_props, propname))
2134                         return (-1);
2135                 zfs_set_recvd_props_mode(zhp, &cookie);
2136                 err = zfs_prop_get(zhp, prop, propbuf, proplen,
2137                     NULL, NULL, 0, literal);
2138                 zfs_unset_recvd_props_mode(zhp, &cookie);
2139         } else {
2140                 nvlist_t *propval;
2141                 char *recvdval;
2142                 if (nvlist_lookup_nvlist(zhp->zfs_recvd_props,
2143                     propname, &propval) != 0)
2144                         return (-1);
2145                 verify(nvlist_lookup_string(propval, ZPROP_VALUE,
2146                     &recvdval) == 0);
2147                 (void) strlcpy(propbuf, recvdval, proplen);
2148         }
2149
2150         return (err == 0 ? 0 : -1);
2151 }
2152
2153 static int
2154 get_clones_string(zfs_handle_t *zhp, char *propbuf, size_t proplen)
2155 {
2156         nvlist_t *value;
2157         nvpair_t *pair;
2158
2159         value = zfs_get_clones_nvl(zhp);
2160         if (value == NULL)
2161                 return (-1);
2162
2163         propbuf[0] = '\0';
2164         for (pair = nvlist_next_nvpair(value, NULL); pair != NULL;
2165             pair = nvlist_next_nvpair(value, pair)) {
2166                 if (propbuf[0] != '\0')
2167                         (void) strlcat(propbuf, ",", proplen);
2168                 (void) strlcat(propbuf, nvpair_name(pair), proplen);
2169         }
2170
2171         return (0);
2172 }
2173
2174 struct get_clones_arg {
2175         uint64_t numclones;
2176         nvlist_t *value;
2177         const char *origin;
2178         char buf[ZFS_MAXNAMELEN];
2179 };
2180
2181 int
2182 get_clones_cb(zfs_handle_t *zhp, void *arg)
2183 {
2184         struct get_clones_arg *gca = arg;
2185
2186         if (gca->numclones == 0) {
2187                 zfs_close(zhp);
2188                 return (0);
2189         }
2190
2191         if (zfs_prop_get(zhp, ZFS_PROP_ORIGIN, gca->buf, sizeof (gca->buf),
2192             NULL, NULL, 0, B_TRUE) != 0)
2193                 goto out;
2194         if (strcmp(gca->buf, gca->origin) == 0) {
2195                 fnvlist_add_boolean(gca->value, zfs_get_name(zhp));
2196                 gca->numclones--;
2197         }
2198
2199 out:
2200         (void) zfs_iter_children(zhp, get_clones_cb, gca);
2201         zfs_close(zhp);
2202         return (0);
2203 }
2204
2205 nvlist_t *
2206 zfs_get_clones_nvl(zfs_handle_t *zhp)
2207 {
2208         nvlist_t *nv, *value;
2209
2210         if (nvlist_lookup_nvlist(zhp->zfs_props,
2211             zfs_prop_to_name(ZFS_PROP_CLONES), &nv) != 0) {
2212                 struct get_clones_arg gca;
2213
2214                 /*
2215                  * if this is a snapshot, then the kernel wasn't able
2216                  * to get the clones.  Do it by slowly iterating.
2217                  */
2218                 if (zhp->zfs_type != ZFS_TYPE_SNAPSHOT)
2219                         return (NULL);
2220                 if (nvlist_alloc(&nv, NV_UNIQUE_NAME, 0) != 0)
2221                         return (NULL);
2222                 if (nvlist_alloc(&value, NV_UNIQUE_NAME, 0) != 0) {
2223                         nvlist_free(nv);
2224                         return (NULL);
2225                 }
2226
2227                 gca.numclones = zfs_prop_get_int(zhp, ZFS_PROP_NUMCLONES);
2228                 gca.value = value;
2229                 gca.origin = zhp->zfs_name;
2230
2231                 if (gca.numclones != 0) {
2232                         zfs_handle_t *root;
2233                         char pool[ZFS_MAXNAMELEN];
2234                         char *cp = pool;
2235
2236                         /* get the pool name */
2237                         (void) strlcpy(pool, zhp->zfs_name, sizeof (pool));
2238                         (void) strsep(&cp, "/@");
2239                         root = zfs_open(zhp->zfs_hdl, pool,
2240                             ZFS_TYPE_FILESYSTEM);
2241
2242                         (void) get_clones_cb(root, &gca);
2243                 }
2244
2245                 if (gca.numclones != 0 ||
2246                     nvlist_add_nvlist(nv, ZPROP_VALUE, value) != 0 ||
2247                     nvlist_add_nvlist(zhp->zfs_props,
2248                     zfs_prop_to_name(ZFS_PROP_CLONES), nv) != 0) {
2249                         nvlist_free(nv);
2250                         nvlist_free(value);
2251                         return (NULL);
2252                 }
2253                 nvlist_free(nv);
2254                 nvlist_free(value);
2255                 verify(0 == nvlist_lookup_nvlist(zhp->zfs_props,
2256                     zfs_prop_to_name(ZFS_PROP_CLONES), &nv));
2257         }
2258
2259         verify(nvlist_lookup_nvlist(nv, ZPROP_VALUE, &value) == 0);
2260
2261         return (value);
2262 }
2263
2264 /*
2265  * Retrieve a property from the given object.  If 'literal' is specified, then
2266  * numbers are left as exact values.  Otherwise, numbers are converted to a
2267  * human-readable form.
2268  *
2269  * Returns 0 on success, or -1 on error.
2270  */
2271 int
2272 zfs_prop_get(zfs_handle_t *zhp, zfs_prop_t prop, char *propbuf, size_t proplen,
2273     zprop_source_t *src, char *statbuf, size_t statlen, boolean_t literal)
2274 {
2275         char *source = NULL;
2276         uint64_t val;
2277         const char *str;
2278         const char *strval;
2279         boolean_t received = zfs_is_recvd_props_mode(zhp);
2280
2281         /*
2282          * Check to see if this property applies to our object
2283          */
2284         if (!zfs_prop_valid_for_type(prop, zhp->zfs_type))
2285                 return (-1);
2286
2287         if (received && zfs_prop_readonly(prop))
2288                 return (-1);
2289
2290         if (src)
2291                 *src = ZPROP_SRC_NONE;
2292
2293         switch (prop) {
2294         case ZFS_PROP_CREATION:
2295                 /*
2296                  * 'creation' is a time_t stored in the statistics.  We convert
2297                  * this into a string unless 'literal' is specified.
2298                  */
2299                 {
2300                         val = getprop_uint64(zhp, prop, &source);
2301                         time_t time = (time_t)val;
2302                         struct tm t;
2303
2304                         if (literal ||
2305                             localtime_r(&time, &t) == NULL ||
2306                             strftime(propbuf, proplen, "%a %b %e %k:%M %Y",
2307                             &t) == 0)
2308                                 (void) snprintf(propbuf, proplen, "%llu", val);
2309                 }
2310                 break;
2311
2312         case ZFS_PROP_MOUNTPOINT:
2313                 /*
2314                  * Getting the precise mountpoint can be tricky.
2315                  *
2316                  *  - for 'none' or 'legacy', return those values.
2317                  *  - for inherited mountpoints, we want to take everything
2318                  *    after our ancestor and append it to the inherited value.
2319                  *
2320                  * If the pool has an alternate root, we want to prepend that
2321                  * root to any values we return.
2322                  */
2323
2324                 str = getprop_string(zhp, prop, &source);
2325
2326                 if (str[0] == '/') {
2327                         char buf[MAXPATHLEN];
2328                         char *root = buf;
2329                         const char *relpath;
2330
2331                         /*
2332                          * If we inherit the mountpoint, even from a dataset
2333                          * with a received value, the source will be the path of
2334                          * the dataset we inherit from. If source is
2335                          * ZPROP_SOURCE_VAL_RECVD, the received value is not
2336                          * inherited.
2337                          */
2338                         if (strcmp(source, ZPROP_SOURCE_VAL_RECVD) == 0) {
2339                                 relpath = "";
2340                         } else {
2341                                 relpath = zhp->zfs_name + strlen(source);
2342                                 if (relpath[0] == '/')
2343                                         relpath++;
2344                         }
2345
2346                         if ((zpool_get_prop(zhp->zpool_hdl,
2347                             ZPOOL_PROP_ALTROOT, buf, MAXPATHLEN, NULL,
2348                             B_FALSE)) || (strcmp(root, "-") == 0))
2349                                 root[0] = '\0';
2350                         /*
2351                          * Special case an alternate root of '/'. This will
2352                          * avoid having multiple leading slashes in the
2353                          * mountpoint path.
2354                          */
2355                         if (strcmp(root, "/") == 0)
2356                                 root++;
2357
2358                         /*
2359                          * If the mountpoint is '/' then skip over this
2360                          * if we are obtaining either an alternate root or
2361                          * an inherited mountpoint.
2362                          */
2363                         if (str[1] == '\0' && (root[0] != '\0' ||
2364                             relpath[0] != '\0'))
2365                                 str++;
2366
2367                         if (relpath[0] == '\0')
2368                                 (void) snprintf(propbuf, proplen, "%s%s",
2369                                     root, str);
2370                         else
2371                                 (void) snprintf(propbuf, proplen, "%s%s%s%s",
2372                                     root, str, relpath[0] == '@' ? "" : "/",
2373                                     relpath);
2374                 } else {
2375                         /* 'legacy' or 'none' */
2376                         (void) strlcpy(propbuf, str, proplen);
2377                 }
2378
2379                 break;
2380
2381         case ZFS_PROP_ORIGIN:
2382                 str = getprop_string(zhp, prop, &source);
2383                 if (str == NULL)
2384                         return (-1);
2385                 (void) strlcpy(propbuf, str, proplen);
2386                 break;
2387
2388         case ZFS_PROP_CLONES:
2389                 if (get_clones_string(zhp, propbuf, proplen) != 0)
2390                         return (-1);
2391                 break;
2392
2393         case ZFS_PROP_QUOTA:
2394         case ZFS_PROP_REFQUOTA:
2395         case ZFS_PROP_RESERVATION:
2396         case ZFS_PROP_REFRESERVATION:
2397
2398                 if (get_numeric_property(zhp, prop, src, &source, &val) != 0)
2399                         return (-1);
2400
2401                 /*
2402                  * If quota or reservation is 0, we translate this into 'none'
2403                  * (unless literal is set), and indicate that it's the default
2404                  * value.  Otherwise, we print the number nicely and indicate
2405                  * that its set locally.
2406                  */
2407                 if (val == 0) {
2408                         if (literal)
2409                                 (void) strlcpy(propbuf, "0", proplen);
2410                         else
2411                                 (void) strlcpy(propbuf, "none", proplen);
2412                 } else {
2413                         if (literal)
2414                                 (void) snprintf(propbuf, proplen, "%llu",
2415                                     (u_longlong_t)val);
2416                         else
2417                                 zfs_nicenum(val, propbuf, proplen);
2418                 }
2419                 break;
2420
2421         case ZFS_PROP_FILESYSTEM_LIMIT:
2422         case ZFS_PROP_SNAPSHOT_LIMIT:
2423         case ZFS_PROP_FILESYSTEM_COUNT:
2424         case ZFS_PROP_SNAPSHOT_COUNT:
2425
2426                 if (get_numeric_property(zhp, prop, src, &source, &val) != 0)
2427                         return (-1);
2428
2429                 /*
2430                  * If limit is UINT64_MAX, we translate this into 'none' (unless
2431                  * literal is set), and indicate that it's the default value.
2432                  * Otherwise, we print the number nicely and indicate that it's
2433                  * set locally.
2434                  */
2435                 if (literal) {
2436                         (void) snprintf(propbuf, proplen, "%llu",
2437                             (u_longlong_t)val);
2438                 } else if (val == UINT64_MAX) {
2439                         (void) strlcpy(propbuf, "none", proplen);
2440                 } else {
2441                         zfs_nicenum(val, propbuf, proplen);
2442                 }
2443                 break;
2444
2445         case ZFS_PROP_REFRATIO:
2446         case ZFS_PROP_COMPRESSRATIO:
2447                 if (get_numeric_property(zhp, prop, src, &source, &val) != 0)
2448                         return (-1);
2449                 (void) snprintf(propbuf, proplen, "%llu.%02llux",
2450                     (u_longlong_t)(val / 100),
2451                     (u_longlong_t)(val % 100));
2452                 break;
2453
2454         case ZFS_PROP_TYPE:
2455                 switch (zhp->zfs_type) {
2456                 case ZFS_TYPE_FILESYSTEM:
2457                         str = "filesystem";
2458                         break;
2459                 case ZFS_TYPE_VOLUME:
2460                         str = "volume";
2461                         break;
2462                 case ZFS_TYPE_SNAPSHOT:
2463                         str = "snapshot";
2464                         break;
2465                 case ZFS_TYPE_BOOKMARK:
2466                         str = "bookmark";
2467                         break;
2468                 default:
2469                         abort();
2470                 }
2471                 (void) snprintf(propbuf, proplen, "%s", str);
2472                 break;
2473
2474         case ZFS_PROP_MOUNTED:
2475                 /*
2476                  * The 'mounted' property is a pseudo-property that described
2477                  * whether the filesystem is currently mounted.  Even though
2478                  * it's a boolean value, the typical values of "on" and "off"
2479                  * don't make sense, so we translate to "yes" and "no".
2480                  */
2481                 if (get_numeric_property(zhp, ZFS_PROP_MOUNTED,
2482                     src, &source, &val) != 0)
2483                         return (-1);
2484                 if (val)
2485                         (void) strlcpy(propbuf, "yes", proplen);
2486                 else
2487                         (void) strlcpy(propbuf, "no", proplen);
2488                 break;
2489
2490         case ZFS_PROP_NAME:
2491                 /*
2492                  * The 'name' property is a pseudo-property derived from the
2493                  * dataset name.  It is presented as a real property to simplify
2494                  * consumers.
2495                  */
2496                 (void) strlcpy(propbuf, zhp->zfs_name, proplen);
2497                 break;
2498
2499         case ZFS_PROP_MLSLABEL:
2500                 {
2501 #ifdef illumos
2502                         m_label_t *new_sl = NULL;
2503                         char *ascii = NULL;     /* human readable label */
2504
2505                         (void) strlcpy(propbuf,
2506                             getprop_string(zhp, prop, &source), proplen);
2507
2508                         if (literal || (strcasecmp(propbuf,
2509                             ZFS_MLSLABEL_DEFAULT) == 0))
2510                                 break;
2511
2512                         /*
2513                          * Try to translate the internal hex string to
2514                          * human-readable output.  If there are any
2515                          * problems just use the hex string.
2516                          */
2517
2518                         if (str_to_label(propbuf, &new_sl, MAC_LABEL,
2519                             L_NO_CORRECTION, NULL) == -1) {
2520                                 m_label_free(new_sl);
2521                                 break;
2522                         }
2523
2524                         if (label_to_str(new_sl, &ascii, M_LABEL,
2525                             DEF_NAMES) != 0) {
2526                                 if (ascii)
2527                                         free(ascii);
2528                                 m_label_free(new_sl);
2529                                 break;
2530                         }
2531                         m_label_free(new_sl);
2532
2533                         (void) strlcpy(propbuf, ascii, proplen);
2534                         free(ascii);
2535 #else   /* !illumos */
2536                         propbuf[0] = '\0';
2537 #endif  /* illumos */
2538                 }
2539                 break;
2540
2541         case ZFS_PROP_GUID:
2542                 /*
2543                  * GUIDs are stored as numbers, but they are identifiers.
2544                  * We don't want them to be pretty printed, because pretty
2545                  * printing mangles the ID into a truncated and useless value.
2546                  */
2547                 if (get_numeric_property(zhp, prop, src, &source, &val) != 0)
2548                         return (-1);
2549                 (void) snprintf(propbuf, proplen, "%llu", (u_longlong_t)val);
2550                 break;
2551
2552         default:
2553                 switch (zfs_prop_get_type(prop)) {
2554                 case PROP_TYPE_NUMBER:
2555                         if (get_numeric_property(zhp, prop, src,
2556                             &source, &val) != 0)
2557                                 return (-1);
2558                         if (literal)
2559                                 (void) snprintf(propbuf, proplen, "%llu",
2560                                     (u_longlong_t)val);
2561                         else
2562                                 zfs_nicenum(val, propbuf, proplen);
2563                         break;
2564
2565                 case PROP_TYPE_STRING:
2566                         str = getprop_string(zhp, prop, &source);
2567                         if (str == NULL)
2568                                 return (-1);
2569                         (void) strlcpy(propbuf, str, proplen);
2570                         break;
2571
2572                 case PROP_TYPE_INDEX:
2573                         if (get_numeric_property(zhp, prop, src,
2574                             &source, &val) != 0)
2575                                 return (-1);
2576                         if (zfs_prop_index_to_string(prop, val, &strval) != 0)
2577                                 return (-1);
2578                         (void) strlcpy(propbuf, strval, proplen);
2579                         break;
2580
2581                 default:
2582                         abort();
2583                 }
2584         }
2585
2586         get_source(zhp, src, source, statbuf, statlen);
2587
2588         return (0);
2589 }
2590
2591 /*
2592  * Utility function to get the given numeric property.  Does no validation that
2593  * the given property is the appropriate type; should only be used with
2594  * hard-coded property types.
2595  */
2596 uint64_t
2597 zfs_prop_get_int(zfs_handle_t *zhp, zfs_prop_t prop)
2598 {
2599         char *source;
2600         uint64_t val;
2601
2602         (void) get_numeric_property(zhp, prop, NULL, &source, &val);
2603
2604         return (val);
2605 }
2606
2607 int
2608 zfs_prop_set_int(zfs_handle_t *zhp, zfs_prop_t prop, uint64_t val)
2609 {
2610         char buf[64];
2611
2612         (void) snprintf(buf, sizeof (buf), "%llu", (longlong_t)val);
2613         return (zfs_prop_set(zhp, zfs_prop_to_name(prop), buf));
2614 }
2615
2616 /*
2617  * Similar to zfs_prop_get(), but returns the value as an integer.
2618  */
2619 int
2620 zfs_prop_get_numeric(zfs_handle_t *zhp, zfs_prop_t prop, uint64_t *value,
2621     zprop_source_t *src, char *statbuf, size_t statlen)
2622 {
2623         char *source;
2624
2625         /*
2626          * Check to see if this property applies to our object
2627          */
2628         if (!zfs_prop_valid_for_type(prop, zhp->zfs_type)) {
2629                 return (zfs_error_fmt(zhp->zfs_hdl, EZFS_PROPTYPE,
2630                     dgettext(TEXT_DOMAIN, "cannot get property '%s'"),
2631                     zfs_prop_to_name(prop)));
2632         }
2633
2634         if (src)
2635                 *src = ZPROP_SRC_NONE;
2636
2637         if (get_numeric_property(zhp, prop, src, &source, value) != 0)
2638                 return (-1);
2639
2640         get_source(zhp, src, source, statbuf, statlen);
2641
2642         return (0);
2643 }
2644
2645 static int
2646 idmap_id_to_numeric_domain_rid(uid_t id, boolean_t isuser,
2647     char **domainp, idmap_rid_t *ridp)
2648 {
2649 #ifdef illumos
2650         idmap_get_handle_t *get_hdl = NULL;
2651         idmap_stat status;
2652         int err = EINVAL;
2653
2654         if (idmap_get_create(&get_hdl) != IDMAP_SUCCESS)
2655                 goto out;
2656
2657         if (isuser) {
2658                 err = idmap_get_sidbyuid(get_hdl, id,
2659                     IDMAP_REQ_FLG_USE_CACHE, domainp, ridp, &status);
2660         } else {
2661                 err = idmap_get_sidbygid(get_hdl, id,
2662                     IDMAP_REQ_FLG_USE_CACHE, domainp, ridp, &status);
2663         }
2664         if (err == IDMAP_SUCCESS &&
2665             idmap_get_mappings(get_hdl) == IDMAP_SUCCESS &&
2666             status == IDMAP_SUCCESS)
2667                 err = 0;
2668         else
2669                 err = EINVAL;
2670 out:
2671         if (get_hdl)
2672                 idmap_get_destroy(get_hdl);
2673         return (err);
2674 #else   /* !illumos */
2675         assert(!"invalid code path");
2676         return (EINVAL); // silence compiler warning
2677 #endif  /* illumos */
2678 }
2679
2680 /*
2681  * convert the propname into parameters needed by kernel
2682  * Eg: userquota@ahrens -> ZFS_PROP_USERQUOTA, "", 126829
2683  * Eg: userused@matt@domain -> ZFS_PROP_USERUSED, "S-1-123-456", 789
2684  */
2685 static int
2686 userquota_propname_decode(const char *propname, boolean_t zoned,
2687     zfs_userquota_prop_t *typep, char *domain, int domainlen, uint64_t *ridp)
2688 {
2689         zfs_userquota_prop_t type;
2690         char *cp, *end;
2691         char *numericsid = NULL;
2692         boolean_t isuser;
2693
2694         domain[0] = '\0';
2695         *ridp = 0;
2696         /* Figure out the property type ({user|group}{quota|space}) */
2697         for (type = 0; type < ZFS_NUM_USERQUOTA_PROPS; type++) {
2698                 if (strncmp(propname, zfs_userquota_prop_prefixes[type],
2699                     strlen(zfs_userquota_prop_prefixes[type])) == 0)
2700                         break;
2701         }
2702         if (type == ZFS_NUM_USERQUOTA_PROPS)
2703                 return (EINVAL);
2704         *typep = type;
2705
2706         isuser = (type == ZFS_PROP_USERQUOTA ||
2707             type == ZFS_PROP_USERUSED);
2708
2709         cp = strchr(propname, '@') + 1;
2710
2711         if (strchr(cp, '@')) {
2712 #ifdef illumos
2713                 /*
2714                  * It's a SID name (eg "user@domain") that needs to be
2715                  * turned into S-1-domainID-RID.
2716                  */
2717                 int flag = 0;
2718                 idmap_stat stat, map_stat;
2719                 uid_t pid;
2720                 idmap_rid_t rid;
2721                 idmap_get_handle_t *gh = NULL;
2722
2723                 stat = idmap_get_create(&gh);
2724                 if (stat != IDMAP_SUCCESS) {
2725                         idmap_get_destroy(gh);
2726                         return (ENOMEM);
2727                 }
2728                 if (zoned && getzoneid() == GLOBAL_ZONEID)
2729                         return (ENOENT);
2730                 if (isuser) {
2731                         stat = idmap_getuidbywinname(cp, NULL, flag, &pid);
2732                         if (stat < 0)
2733                                 return (ENOENT);
2734                         stat = idmap_get_sidbyuid(gh, pid, flag, &numericsid,
2735                             &rid, &map_stat);
2736                 } else {
2737                         stat = idmap_getgidbywinname(cp, NULL, flag, &pid);
2738                         if (stat < 0)
2739                                 return (ENOENT);
2740                         stat = idmap_get_sidbygid(gh, pid, flag, &numericsid,
2741                             &rid, &map_stat);
2742                 }
2743                 if (stat < 0) {
2744                         idmap_get_destroy(gh);
2745                         return (ENOENT);
2746                 }
2747                 stat = idmap_get_mappings(gh);
2748                 idmap_get_destroy(gh);
2749
2750                 if (stat < 0) {
2751                         return (ENOENT);
2752                 }
2753                 if (numericsid == NULL)
2754                         return (ENOENT);
2755                 cp = numericsid;
2756                 *ridp = rid;
2757                 /* will be further decoded below */
2758 #else   /* !illumos */
2759                 return (ENOENT);
2760 #endif  /* illumos */
2761         }
2762
2763         if (strncmp(cp, "S-1-", 4) == 0) {
2764                 /* It's a numeric SID (eg "S-1-234-567-89") */
2765                 (void) strlcpy(domain, cp, domainlen);
2766                 errno = 0;
2767                 if (*ridp == 0) {
2768                         cp = strrchr(domain, '-');
2769                         *cp = '\0';
2770                         cp++;
2771                         *ridp = strtoull(cp, &end, 10);
2772                 } else {
2773                         end = "";
2774                 }
2775                 if (numericsid) {
2776                         free(numericsid);
2777                         numericsid = NULL;
2778                 }
2779                 if (errno != 0 || *end != '\0')
2780                         return (EINVAL);
2781         } else if (!isdigit(*cp)) {
2782                 /*
2783                  * It's a user/group name (eg "user") that needs to be
2784                  * turned into a uid/gid
2785                  */
2786                 if (zoned && getzoneid() == GLOBAL_ZONEID)
2787                         return (ENOENT);
2788                 if (isuser) {
2789                         struct passwd *pw;
2790                         pw = getpwnam(cp);
2791                         if (pw == NULL)
2792                                 return (ENOENT);
2793                         *ridp = pw->pw_uid;
2794                 } else {
2795                         struct group *gr;
2796                         gr = getgrnam(cp);
2797                         if (gr == NULL)
2798                                 return (ENOENT);
2799                         *ridp = gr->gr_gid;
2800                 }
2801         } else {
2802                 /* It's a user/group ID (eg "12345"). */
2803                 uid_t id = strtoul(cp, &end, 10);
2804                 idmap_rid_t rid;
2805                 char *mapdomain;
2806
2807                 if (*end != '\0')
2808                         return (EINVAL);
2809                 if (id > MAXUID) {
2810                         /* It's an ephemeral ID. */
2811                         if (idmap_id_to_numeric_domain_rid(id, isuser,
2812                             &mapdomain, &rid) != 0)
2813                                 return (ENOENT);
2814                         (void) strlcpy(domain, mapdomain, domainlen);
2815                         *ridp = rid;
2816                 } else {
2817                         *ridp = id;
2818                 }
2819         }
2820
2821         ASSERT3P(numericsid, ==, NULL);
2822         return (0);
2823 }
2824
2825 static int
2826 zfs_prop_get_userquota_common(zfs_handle_t *zhp, const char *propname,
2827     uint64_t *propvalue, zfs_userquota_prop_t *typep)
2828 {
2829         int err;
2830         zfs_cmd_t zc = { 0 };
2831
2832         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
2833
2834         err = userquota_propname_decode(propname,
2835             zfs_prop_get_int(zhp, ZFS_PROP_ZONED),
2836             typep, zc.zc_value, sizeof (zc.zc_value), &zc.zc_guid);
2837         zc.zc_objset_type = *typep;
2838         if (err)
2839                 return (err);
2840
2841         err = ioctl(zhp->zfs_hdl->libzfs_fd, ZFS_IOC_USERSPACE_ONE, &zc);
2842         if (err)
2843                 return (err);
2844
2845         *propvalue = zc.zc_cookie;
2846         return (0);
2847 }
2848
2849 int
2850 zfs_prop_get_userquota_int(zfs_handle_t *zhp, const char *propname,
2851     uint64_t *propvalue)
2852 {
2853         zfs_userquota_prop_t type;
2854
2855         return (zfs_prop_get_userquota_common(zhp, propname, propvalue,
2856             &type));
2857 }
2858
2859 int
2860 zfs_prop_get_userquota(zfs_handle_t *zhp, const char *propname,
2861     char *propbuf, int proplen, boolean_t literal)
2862 {
2863         int err;
2864         uint64_t propvalue;
2865         zfs_userquota_prop_t type;
2866
2867         err = zfs_prop_get_userquota_common(zhp, propname, &propvalue,
2868             &type);
2869
2870         if (err)
2871                 return (err);
2872
2873         if (literal) {
2874                 (void) snprintf(propbuf, proplen, "%llu", propvalue);
2875         } else if (propvalue == 0 &&
2876             (type == ZFS_PROP_USERQUOTA || type == ZFS_PROP_GROUPQUOTA)) {
2877                 (void) strlcpy(propbuf, "none", proplen);
2878         } else {
2879                 zfs_nicenum(propvalue, propbuf, proplen);
2880         }
2881         return (0);
2882 }
2883
2884 int
2885 zfs_prop_get_written_int(zfs_handle_t *zhp, const char *propname,
2886     uint64_t *propvalue)
2887 {
2888         int err;
2889         zfs_cmd_t zc = { 0 };
2890         const char *snapname;
2891
2892         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
2893
2894         snapname = strchr(propname, '@') + 1;
2895         if (strchr(snapname, '@')) {
2896                 (void) strlcpy(zc.zc_value, snapname, sizeof (zc.zc_value));
2897         } else {
2898                 /* snapname is the short name, append it to zhp's fsname */
2899                 char *cp;
2900
2901                 (void) strlcpy(zc.zc_value, zhp->zfs_name,
2902                     sizeof (zc.zc_value));
2903                 cp = strchr(zc.zc_value, '@');
2904                 if (cp != NULL)
2905                         *cp = '\0';
2906                 (void) strlcat(zc.zc_value, "@", sizeof (zc.zc_value));
2907                 (void) strlcat(zc.zc_value, snapname, sizeof (zc.zc_value));
2908         }
2909
2910         err = ioctl(zhp->zfs_hdl->libzfs_fd, ZFS_IOC_SPACE_WRITTEN, &zc);
2911         if (err)
2912                 return (err);
2913
2914         *propvalue = zc.zc_cookie;
2915         return (0);
2916 }
2917
2918 int
2919 zfs_prop_get_written(zfs_handle_t *zhp, const char *propname,
2920     char *propbuf, int proplen, boolean_t literal)
2921 {
2922         int err;
2923         uint64_t propvalue;
2924
2925         err = zfs_prop_get_written_int(zhp, propname, &propvalue);
2926
2927         if (err)
2928                 return (err);
2929
2930         if (literal) {
2931                 (void) snprintf(propbuf, proplen, "%llu", propvalue);
2932         } else {
2933                 zfs_nicenum(propvalue, propbuf, proplen);
2934         }
2935         return (0);
2936 }
2937
2938 /*
2939  * Returns the name of the given zfs handle.
2940  */
2941 const char *
2942 zfs_get_name(const zfs_handle_t *zhp)
2943 {
2944         return (zhp->zfs_name);
2945 }
2946
2947 /*
2948  * Returns the type of the given zfs handle.
2949  */
2950 zfs_type_t
2951 zfs_get_type(const zfs_handle_t *zhp)
2952 {
2953         return (zhp->zfs_type);
2954 }
2955
2956 /*
2957  * Is one dataset name a child dataset of another?
2958  *
2959  * Needs to handle these cases:
2960  * Dataset 1    "a/foo"         "a/foo"         "a/foo"         "a/foo"
2961  * Dataset 2    "a/fo"          "a/foobar"      "a/bar/baz"     "a/foo/bar"
2962  * Descendant?  No.             No.             No.             Yes.
2963  */
2964 static boolean_t
2965 is_descendant(const char *ds1, const char *ds2)
2966 {
2967         size_t d1len = strlen(ds1);
2968
2969         /* ds2 can't be a descendant if it's smaller */
2970         if (strlen(ds2) < d1len)
2971                 return (B_FALSE);
2972
2973         /* otherwise, compare strings and verify that there's a '/' char */
2974         return (ds2[d1len] == '/' && (strncmp(ds1, ds2, d1len) == 0));
2975 }
2976
2977 /*
2978  * Given a complete name, return just the portion that refers to the parent.
2979  * Will return -1 if there is no parent (path is just the name of the
2980  * pool).
2981  */
2982 static int
2983 parent_name(const char *path, char *buf, size_t buflen)
2984 {
2985         char *slashp;
2986
2987         (void) strlcpy(buf, path, buflen);
2988
2989         if ((slashp = strrchr(buf, '/')) == NULL)
2990                 return (-1);
2991         *slashp = '\0';
2992
2993         return (0);
2994 }
2995
2996 /*
2997  * If accept_ancestor is false, then check to make sure that the given path has
2998  * a parent, and that it exists.  If accept_ancestor is true, then find the
2999  * closest existing ancestor for the given path.  In prefixlen return the
3000  * length of already existing prefix of the given path.  We also fetch the
3001  * 'zoned' property, which is used to validate property settings when creating
3002  * new datasets.
3003  */
3004 static int
3005 check_parents(libzfs_handle_t *hdl, const char *path, uint64_t *zoned,
3006     boolean_t accept_ancestor, int *prefixlen)
3007 {
3008         zfs_cmd_t zc = { 0 };
3009         char parent[ZFS_MAXNAMELEN];
3010         char *slash;
3011         zfs_handle_t *zhp;
3012         char errbuf[1024];
3013         uint64_t is_zoned;
3014
3015         (void) snprintf(errbuf, sizeof (errbuf),
3016             dgettext(TEXT_DOMAIN, "cannot create '%s'"), path);
3017
3018         /* get parent, and check to see if this is just a pool */
3019         if (parent_name(path, parent, sizeof (parent)) != 0) {
3020                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3021                     "missing dataset name"));
3022                 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3023         }
3024
3025         /* check to see if the pool exists */
3026         if ((slash = strchr(parent, '/')) == NULL)
3027                 slash = parent + strlen(parent);
3028         (void) strncpy(zc.zc_name, parent, slash - parent);
3029         zc.zc_name[slash - parent] = '\0';
3030         if (ioctl(hdl->libzfs_fd, ZFS_IOC_OBJSET_STATS, &zc) != 0 &&
3031             errno == ENOENT) {
3032                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3033                     "no such pool '%s'"), zc.zc_name);
3034                 return (zfs_error(hdl, EZFS_NOENT, errbuf));
3035         }
3036
3037         /* check to see if the parent dataset exists */
3038         while ((zhp = make_dataset_handle(hdl, parent)) == NULL) {
3039                 if (errno == ENOENT && accept_ancestor) {
3040                         /*
3041                          * Go deeper to find an ancestor, give up on top level.
3042                          */
3043                         if (parent_name(parent, parent, sizeof (parent)) != 0) {
3044                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3045                                     "no such pool '%s'"), zc.zc_name);
3046                                 return (zfs_error(hdl, EZFS_NOENT, errbuf));
3047                         }
3048                 } else if (errno == ENOENT) {
3049                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3050                             "parent does not exist"));
3051                         return (zfs_error(hdl, EZFS_NOENT, errbuf));
3052                 } else
3053                         return (zfs_standard_error(hdl, errno, errbuf));
3054         }
3055
3056         is_zoned = zfs_prop_get_int(zhp, ZFS_PROP_ZONED);
3057         if (zoned != NULL)
3058                 *zoned = is_zoned;
3059
3060         /* we are in a non-global zone, but parent is in the global zone */
3061         if (getzoneid() != GLOBAL_ZONEID && !is_zoned) {
3062                 (void) zfs_standard_error(hdl, EPERM, errbuf);
3063                 zfs_close(zhp);
3064                 return (-1);
3065         }
3066
3067         /* make sure parent is a filesystem */
3068         if (zfs_get_type(zhp) != ZFS_TYPE_FILESYSTEM) {
3069                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3070                     "parent is not a filesystem"));
3071                 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf);
3072                 zfs_close(zhp);
3073                 return (-1);
3074         }
3075
3076         zfs_close(zhp);
3077         if (prefixlen != NULL)
3078                 *prefixlen = strlen(parent);
3079         return (0);
3080 }
3081
3082 /*
3083  * Finds whether the dataset of the given type(s) exists.
3084  */
3085 boolean_t
3086 zfs_dataset_exists(libzfs_handle_t *hdl, const char *path, zfs_type_t types)
3087 {
3088         zfs_handle_t *zhp;
3089
3090         if (!zfs_validate_name(hdl, path, types, B_FALSE))
3091                 return (B_FALSE);
3092
3093         /*
3094          * Try to get stats for the dataset, which will tell us if it exists.
3095          */
3096         if ((zhp = make_dataset_handle(hdl, path)) != NULL) {
3097                 int ds_type = zhp->zfs_type;
3098
3099                 zfs_close(zhp);
3100                 if (types & ds_type)
3101                         return (B_TRUE);
3102         }
3103         return (B_FALSE);
3104 }
3105
3106 /*
3107  * Given a path to 'target', create all the ancestors between
3108  * the prefixlen portion of the path, and the target itself.
3109  * Fail if the initial prefixlen-ancestor does not already exist.
3110  */
3111 int
3112 create_parents(libzfs_handle_t *hdl, char *target, int prefixlen)
3113 {
3114         zfs_handle_t *h;
3115         char *cp;
3116         const char *opname;
3117
3118         /* make sure prefix exists */
3119         cp = target + prefixlen;
3120         if (*cp != '/') {
3121                 assert(strchr(cp, '/') == NULL);
3122                 h = zfs_open(hdl, target, ZFS_TYPE_FILESYSTEM);
3123         } else {
3124                 *cp = '\0';
3125                 h = zfs_open(hdl, target, ZFS_TYPE_FILESYSTEM);
3126                 *cp = '/';
3127         }
3128         if (h == NULL)
3129                 return (-1);
3130         zfs_close(h);
3131
3132         /*
3133          * Attempt to create, mount, and share any ancestor filesystems,
3134          * up to the prefixlen-long one.
3135          */
3136         for (cp = target + prefixlen + 1;
3137             (cp = strchr(cp, '/')) != NULL; *cp = '/', cp++) {
3138
3139                 *cp = '\0';
3140
3141                 h = make_dataset_handle(hdl, target);
3142                 if (h) {
3143                         /* it already exists, nothing to do here */
3144                         zfs_close(h);
3145                         continue;
3146                 }
3147
3148                 if (zfs_create(hdl, target, ZFS_TYPE_FILESYSTEM,
3149                     NULL) != 0) {
3150                         opname = dgettext(TEXT_DOMAIN, "create");
3151                         goto ancestorerr;
3152                 }
3153
3154                 h = zfs_open(hdl, target, ZFS_TYPE_FILESYSTEM);
3155                 if (h == NULL) {
3156                         opname = dgettext(TEXT_DOMAIN, "open");
3157                         goto ancestorerr;
3158                 }
3159
3160                 if (zfs_mount(h, NULL, 0) != 0) {
3161                         opname = dgettext(TEXT_DOMAIN, "mount");
3162                         goto ancestorerr;
3163                 }
3164
3165                 if (zfs_share(h) != 0) {
3166                         opname = dgettext(TEXT_DOMAIN, "share");
3167                         goto ancestorerr;
3168                 }
3169
3170                 zfs_close(h);
3171         }
3172
3173         return (0);
3174
3175 ancestorerr:
3176         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3177             "failed to %s ancestor '%s'"), opname, target);
3178         return (-1);
3179 }
3180
3181 /*
3182  * Creates non-existing ancestors of the given path.
3183  */
3184 int
3185 zfs_create_ancestors(libzfs_handle_t *hdl, const char *path)
3186 {
3187         int prefix;
3188         char *path_copy;
3189         int rc;
3190
3191         if (check_parents(hdl, path, NULL, B_TRUE, &prefix) != 0)
3192                 return (-1);
3193
3194         if ((path_copy = strdup(path)) != NULL) {
3195                 rc = create_parents(hdl, path_copy, prefix);
3196                 free(path_copy);
3197         }
3198         if (path_copy == NULL || rc != 0)
3199                 return (-1);
3200
3201         return (0);
3202 }
3203
3204 /*
3205  * Create a new filesystem or volume.
3206  */
3207 int
3208 zfs_create(libzfs_handle_t *hdl, const char *path, zfs_type_t type,
3209     nvlist_t *props)
3210 {
3211         int ret;
3212         uint64_t size = 0;
3213         uint64_t blocksize = zfs_prop_default_numeric(ZFS_PROP_VOLBLOCKSIZE);
3214         char errbuf[1024];
3215         uint64_t zoned;
3216         enum lzc_dataset_type ost;
3217
3218         (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3219             "cannot create '%s'"), path);
3220
3221         /* validate the path, taking care to note the extended error message */
3222         if (!zfs_validate_name(hdl, path, type, B_TRUE))
3223                 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3224
3225         /* validate parents exist */
3226         if (check_parents(hdl, path, &zoned, B_FALSE, NULL) != 0)
3227                 return (-1);
3228
3229         /*
3230          * The failure modes when creating a dataset of a different type over
3231          * one that already exists is a little strange.  In particular, if you
3232          * try to create a dataset on top of an existing dataset, the ioctl()
3233          * will return ENOENT, not EEXIST.  To prevent this from happening, we
3234          * first try to see if the dataset exists.
3235          */
3236         if (zfs_dataset_exists(hdl, path, ZFS_TYPE_DATASET)) {
3237                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3238                     "dataset already exists"));
3239                 return (zfs_error(hdl, EZFS_EXISTS, errbuf));
3240         }
3241
3242         if (type == ZFS_TYPE_VOLUME)
3243                 ost = LZC_DATSET_TYPE_ZVOL;
3244         else
3245                 ost = LZC_DATSET_TYPE_ZFS;
3246
3247         /* open zpool handle for prop validation */
3248         char pool_path[MAXNAMELEN];
3249         (void) strlcpy(pool_path, path, sizeof (pool_path));
3250
3251         /* truncate pool_path at first slash */
3252         char *p = strchr(pool_path, '/');
3253         if (p != NULL)
3254                 *p = '\0';
3255
3256         zpool_handle_t *zpool_handle = zpool_open(hdl, pool_path);
3257
3258         if (props && (props = zfs_valid_proplist(hdl, type, props,
3259             zoned, NULL, zpool_handle, errbuf)) == 0) {
3260                 zpool_close(zpool_handle);
3261                 return (-1);
3262         }
3263         zpool_close(zpool_handle);
3264
3265         if (type == ZFS_TYPE_VOLUME) {
3266                 /*
3267                  * If we are creating a volume, the size and block size must
3268                  * satisfy a few restraints.  First, the blocksize must be a
3269                  * valid block size between SPA_{MIN,MAX}BLOCKSIZE.  Second, the
3270                  * volsize must be a multiple of the block size, and cannot be
3271                  * zero.
3272                  */
3273                 if (props == NULL || nvlist_lookup_uint64(props,
3274                     zfs_prop_to_name(ZFS_PROP_VOLSIZE), &size) != 0) {
3275                         nvlist_free(props);
3276                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3277                             "missing volume size"));
3278                         return (zfs_error(hdl, EZFS_BADPROP, errbuf));
3279                 }
3280
3281                 if ((ret = nvlist_lookup_uint64(props,
3282                     zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE),
3283                     &blocksize)) != 0) {
3284                         if (ret == ENOENT) {
3285                                 blocksize = zfs_prop_default_numeric(
3286                                     ZFS_PROP_VOLBLOCKSIZE);
3287                         } else {
3288                                 nvlist_free(props);
3289                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3290                                     "missing volume block size"));
3291                                 return (zfs_error(hdl, EZFS_BADPROP, errbuf));
3292                         }
3293                 }
3294
3295                 if (size == 0) {
3296                         nvlist_free(props);
3297                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3298                             "volume size cannot be zero"));
3299                         return (zfs_error(hdl, EZFS_BADPROP, errbuf));
3300                 }
3301
3302                 if (size % blocksize != 0) {
3303                         nvlist_free(props);
3304                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3305                             "volume size must be a multiple of volume block "
3306                             "size"));
3307                         return (zfs_error(hdl, EZFS_BADPROP, errbuf));
3308                 }
3309         }
3310
3311         /* create the dataset */
3312         ret = lzc_create(path, ost, props);
3313         nvlist_free(props);
3314
3315         /* check for failure */
3316         if (ret != 0) {
3317                 char parent[ZFS_MAXNAMELEN];
3318                 (void) parent_name(path, parent, sizeof (parent));
3319
3320                 switch (errno) {
3321                 case ENOENT:
3322                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3323                             "no such parent '%s'"), parent);
3324                         return (zfs_error(hdl, EZFS_NOENT, errbuf));
3325
3326                 case EINVAL:
3327                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3328                             "parent '%s' is not a filesystem"), parent);
3329                         return (zfs_error(hdl, EZFS_BADTYPE, errbuf));
3330
3331                 case ENOTSUP:
3332                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3333                             "pool must be upgraded to set this "
3334                             "property or value"));
3335                         return (zfs_error(hdl, EZFS_BADVERSION, errbuf));
3336 #ifdef _ILP32
3337                 case EOVERFLOW:
3338                         /*
3339                          * This platform can't address a volume this big.
3340                          */
3341                         if (type == ZFS_TYPE_VOLUME)
3342                                 return (zfs_error(hdl, EZFS_VOLTOOBIG,
3343                                     errbuf));
3344 #endif
3345                         /* FALLTHROUGH */
3346                 default:
3347                         return (zfs_standard_error(hdl, errno, errbuf));
3348                 }
3349         }
3350
3351         return (0);
3352 }
3353
3354 /*
3355  * Destroys the given dataset.  The caller must make sure that the filesystem
3356  * isn't mounted, and that there are no active dependents. If the file system
3357  * does not exist this function does nothing.
3358  */
3359 int
3360 zfs_destroy(zfs_handle_t *zhp, boolean_t defer)
3361 {
3362         zfs_cmd_t zc = { 0 };
3363
3364         if (zhp->zfs_type == ZFS_TYPE_BOOKMARK) {
3365                 nvlist_t *nv = fnvlist_alloc();
3366                 fnvlist_add_boolean(nv, zhp->zfs_name);
3367                 int error = lzc_destroy_bookmarks(nv, NULL);
3368                 fnvlist_free(nv);
3369                 if (error != 0) {
3370                         return (zfs_standard_error_fmt(zhp->zfs_hdl, errno,
3371                             dgettext(TEXT_DOMAIN, "cannot destroy '%s'"),
3372                             zhp->zfs_name));
3373                 }
3374                 return (0);
3375         }
3376
3377         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
3378
3379         if (ZFS_IS_VOLUME(zhp)) {
3380                 zc.zc_objset_type = DMU_OST_ZVOL;
3381         } else {
3382                 zc.zc_objset_type = DMU_OST_ZFS;
3383         }
3384
3385         zc.zc_defer_destroy = defer;
3386         if (zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_DESTROY, &zc) != 0 &&
3387             errno != ENOENT) {
3388                 return (zfs_standard_error_fmt(zhp->zfs_hdl, errno,
3389                     dgettext(TEXT_DOMAIN, "cannot destroy '%s'"),
3390                     zhp->zfs_name));
3391         }
3392
3393         remove_mountpoint(zhp);
3394
3395         return (0);
3396 }
3397
3398 struct destroydata {
3399         nvlist_t *nvl;
3400         const char *snapname;
3401 };
3402
3403 static int
3404 zfs_check_snap_cb(zfs_handle_t *zhp, void *arg)
3405 {
3406         struct destroydata *dd = arg;
3407         char name[ZFS_MAXNAMELEN];
3408         int rv = 0;
3409
3410         (void) snprintf(name, sizeof (name),
3411             "%s@%s", zhp->zfs_name, dd->snapname);
3412
3413         if (lzc_exists(name))
3414                 verify(nvlist_add_boolean(dd->nvl, name) == 0);
3415
3416         rv = zfs_iter_filesystems(zhp, zfs_check_snap_cb, dd);
3417         zfs_close(zhp);
3418         return (rv);
3419 }
3420
3421 /*
3422  * Destroys all snapshots with the given name in zhp & descendants.
3423  */
3424 int
3425 zfs_destroy_snaps(zfs_handle_t *zhp, char *snapname, boolean_t defer)
3426 {
3427         int ret;
3428         struct destroydata dd = { 0 };
3429
3430         dd.snapname = snapname;
3431         verify(nvlist_alloc(&dd.nvl, NV_UNIQUE_NAME, 0) == 0);
3432         (void) zfs_check_snap_cb(zfs_handle_dup(zhp), &dd);
3433
3434         if (nvlist_empty(dd.nvl)) {
3435                 ret = zfs_standard_error_fmt(zhp->zfs_hdl, ENOENT,
3436                     dgettext(TEXT_DOMAIN, "cannot destroy '%s@%s'"),
3437                     zhp->zfs_name, snapname);
3438         } else {
3439                 ret = zfs_destroy_snaps_nvl(zhp->zfs_hdl, dd.nvl, defer);
3440         }
3441         nvlist_free(dd.nvl);
3442         return (ret);
3443 }
3444
3445 /*
3446  * Destroys all the snapshots named in the nvlist.
3447  */
3448 int
3449 zfs_destroy_snaps_nvl(libzfs_handle_t *hdl, nvlist_t *snaps, boolean_t defer)
3450 {
3451         int ret;
3452         nvlist_t *errlist;
3453
3454         ret = lzc_destroy_snaps(snaps, defer, &errlist);
3455
3456         if (ret == 0)
3457                 return (0);
3458
3459         if (nvlist_empty(errlist)) {
3460                 char errbuf[1024];
3461                 (void) snprintf(errbuf, sizeof (errbuf),
3462                     dgettext(TEXT_DOMAIN, "cannot destroy snapshots"));
3463
3464                 ret = zfs_standard_error(hdl, ret, errbuf);
3465         }
3466         for (nvpair_t *pair = nvlist_next_nvpair(errlist, NULL);
3467             pair != NULL; pair = nvlist_next_nvpair(errlist, pair)) {
3468                 char errbuf[1024];
3469                 (void) snprintf(errbuf, sizeof (errbuf),
3470                     dgettext(TEXT_DOMAIN, "cannot destroy snapshot %s"),
3471                     nvpair_name(pair));
3472
3473                 switch (fnvpair_value_int32(pair)) {
3474                 case EEXIST:
3475                         zfs_error_aux(hdl,
3476                             dgettext(TEXT_DOMAIN, "snapshot is cloned"));
3477                         ret = zfs_error(hdl, EZFS_EXISTS, errbuf);
3478                         break;
3479                 default:
3480                         ret = zfs_standard_error(hdl, errno, errbuf);
3481                         break;
3482                 }
3483         }
3484
3485         return (ret);
3486 }
3487
3488 /*
3489  * Clones the given dataset.  The target must be of the same type as the source.
3490  */
3491 int
3492 zfs_clone(zfs_handle_t *zhp, const char *target, nvlist_t *props)
3493 {
3494         char parent[ZFS_MAXNAMELEN];
3495         int ret;
3496         char errbuf[1024];
3497         libzfs_handle_t *hdl = zhp->zfs_hdl;
3498         uint64_t zoned;
3499
3500         assert(zhp->zfs_type == ZFS_TYPE_SNAPSHOT);
3501
3502         (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3503             "cannot create '%s'"), target);
3504
3505         /* validate the target/clone name */
3506         if (!zfs_validate_name(hdl, target, ZFS_TYPE_FILESYSTEM, B_TRUE))
3507                 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3508
3509         /* validate parents exist */
3510         if (check_parents(hdl, target, &zoned, B_FALSE, NULL) != 0)
3511                 return (-1);
3512
3513         (void) parent_name(target, parent, sizeof (parent));
3514
3515         /* do the clone */
3516
3517         if (props) {
3518                 zfs_type_t type;
3519                 if (ZFS_IS_VOLUME(zhp)) {
3520                         type = ZFS_TYPE_VOLUME;
3521                 } else {
3522                         type = ZFS_TYPE_FILESYSTEM;
3523                 }
3524                 if ((props = zfs_valid_proplist(hdl, type, props, zoned,
3525                     zhp, zhp->zpool_hdl, errbuf)) == NULL)
3526                         return (-1);
3527         }
3528
3529         ret = lzc_clone(target, zhp->zfs_name, props);
3530         nvlist_free(props);
3531
3532         if (ret != 0) {
3533                 switch (errno) {
3534
3535                 case ENOENT:
3536                         /*
3537                          * The parent doesn't exist.  We should have caught this
3538                          * above, but there may a race condition that has since
3539                          * destroyed the parent.
3540                          *
3541                          * At this point, we don't know whether it's the source
3542                          * that doesn't exist anymore, or whether the target
3543                          * dataset doesn't exist.
3544                          */
3545                         zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN,
3546                             "no such parent '%s'"), parent);
3547                         return (zfs_error(zhp->zfs_hdl, EZFS_NOENT, errbuf));
3548
3549                 case EXDEV:
3550                         zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN,
3551                             "source and target pools differ"));
3552                         return (zfs_error(zhp->zfs_hdl, EZFS_CROSSTARGET,
3553                             errbuf));
3554
3555                 default:
3556                         return (zfs_standard_error(zhp->zfs_hdl, errno,
3557                             errbuf));
3558                 }
3559         }
3560
3561         return (ret);
3562 }
3563
3564 /*
3565  * Promotes the given clone fs to be the clone parent.
3566  */
3567 int
3568 zfs_promote(zfs_handle_t *zhp)
3569 {
3570         libzfs_handle_t *hdl = zhp->zfs_hdl;
3571         zfs_cmd_t zc = { 0 };
3572         char parent[MAXPATHLEN];
3573         int ret;
3574         char errbuf[1024];
3575
3576         (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3577             "cannot promote '%s'"), zhp->zfs_name);
3578
3579         if (zhp->zfs_type == ZFS_TYPE_SNAPSHOT) {
3580                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3581                     "snapshots can not be promoted"));
3582                 return (zfs_error(hdl, EZFS_BADTYPE, errbuf));
3583         }
3584
3585         (void) strlcpy(parent, zhp->zfs_dmustats.dds_origin, sizeof (parent));
3586         if (parent[0] == '\0') {
3587                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3588                     "not a cloned filesystem"));
3589                 return (zfs_error(hdl, EZFS_BADTYPE, errbuf));
3590         }
3591
3592         (void) strlcpy(zc.zc_value, zhp->zfs_dmustats.dds_origin,
3593             sizeof (zc.zc_value));
3594         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
3595         ret = zfs_ioctl(hdl, ZFS_IOC_PROMOTE, &zc);
3596
3597         if (ret != 0) {
3598                 int save_errno = errno;
3599
3600                 switch (save_errno) {
3601                 case EEXIST:
3602                         /* There is a conflicting snapshot name. */
3603                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3604                             "conflicting snapshot '%s' from parent '%s'"),
3605                             zc.zc_string, parent);
3606                         return (zfs_error(hdl, EZFS_EXISTS, errbuf));
3607
3608                 default:
3609                         return (zfs_standard_error(hdl, save_errno, errbuf));
3610                 }
3611         }
3612         return (ret);
3613 }
3614
3615 typedef struct snapdata {
3616         nvlist_t *sd_nvl;
3617         const char *sd_snapname;
3618 } snapdata_t;
3619
3620 static int
3621 zfs_snapshot_cb(zfs_handle_t *zhp, void *arg)
3622 {
3623         snapdata_t *sd = arg;
3624         char name[ZFS_MAXNAMELEN];
3625         int rv = 0;
3626
3627         if (zfs_prop_get_int(zhp, ZFS_PROP_INCONSISTENT) == 0) {
3628                 (void) snprintf(name, sizeof (name),
3629                     "%s@%s", zfs_get_name(zhp), sd->sd_snapname);
3630
3631                 fnvlist_add_boolean(sd->sd_nvl, name);
3632
3633                 rv = zfs_iter_filesystems(zhp, zfs_snapshot_cb, sd);
3634         }
3635         zfs_close(zhp);
3636
3637         return (rv);
3638 }
3639
3640 /*
3641  * Creates snapshots.  The keys in the snaps nvlist are the snapshots to be
3642  * created.
3643  */
3644 int
3645 zfs_snapshot_nvl(libzfs_handle_t *hdl, nvlist_t *snaps, nvlist_t *props)
3646 {
3647         int ret;
3648         char errbuf[1024];
3649         nvpair_t *elem;
3650         nvlist_t *errors;
3651
3652         (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3653             "cannot create snapshots "));
3654
3655         elem = NULL;
3656         while ((elem = nvlist_next_nvpair(snaps, elem)) != NULL) {
3657                 const char *snapname = nvpair_name(elem);
3658
3659                 /* validate the target name */
3660                 if (!zfs_validate_name(hdl, snapname, ZFS_TYPE_SNAPSHOT,
3661                     B_TRUE)) {
3662                         (void) snprintf(errbuf, sizeof (errbuf),
3663                             dgettext(TEXT_DOMAIN,
3664                             "cannot create snapshot '%s'"), snapname);
3665                         return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3666                 }
3667         }
3668
3669         /*
3670          * get pool handle for prop validation. assumes all snaps are in the
3671          * same pool, as does lzc_snapshot (below).
3672          */
3673         char pool[MAXNAMELEN];
3674         elem = nvlist_next_nvpair(snaps, NULL);
3675         (void) strlcpy(pool, nvpair_name(elem), sizeof (pool));
3676         pool[strcspn(pool, "/@")] = '\0';
3677         zpool_handle_t *zpool_hdl = zpool_open(hdl, pool);
3678
3679         if (props != NULL &&
3680             (props = zfs_valid_proplist(hdl, ZFS_TYPE_SNAPSHOT,
3681             props, B_FALSE, NULL, zpool_hdl, errbuf)) == NULL) {
3682                 zpool_close(zpool_hdl);
3683                 return (-1);
3684         }
3685         zpool_close(zpool_hdl);
3686
3687         ret = lzc_snapshot(snaps, props, &errors);
3688
3689         if (ret != 0) {
3690                 boolean_t printed = B_FALSE;
3691                 for (elem = nvlist_next_nvpair(errors, NULL);
3692                     elem != NULL;
3693                     elem = nvlist_next_nvpair(errors, elem)) {
3694                         (void) snprintf(errbuf, sizeof (errbuf),
3695                             dgettext(TEXT_DOMAIN,
3696                             "cannot create snapshot '%s'"), nvpair_name(elem));
3697                         (void) zfs_standard_error(hdl,
3698                             fnvpair_value_int32(elem), errbuf);
3699                         printed = B_TRUE;
3700                 }
3701                 if (!printed) {
3702                         switch (ret) {
3703                         case EXDEV:
3704                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3705                                     "multiple snapshots of same "
3706                                     "fs not allowed"));
3707                                 (void) zfs_error(hdl, EZFS_EXISTS, errbuf);
3708
3709                                 break;
3710                         default:
3711                                 (void) zfs_standard_error(hdl, ret, errbuf);
3712                         }
3713                 }
3714         }
3715
3716         nvlist_free(props);
3717         nvlist_free(errors);
3718         return (ret);
3719 }
3720
3721 int
3722 zfs_snapshot(libzfs_handle_t *hdl, const char *path, boolean_t recursive,
3723     nvlist_t *props)
3724 {
3725         int ret;
3726         snapdata_t sd = { 0 };
3727         char fsname[ZFS_MAXNAMELEN];
3728         char *cp;
3729         zfs_handle_t *zhp;
3730         char errbuf[1024];
3731
3732         (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3733             "cannot snapshot %s"), path);
3734
3735         if (!zfs_validate_name(hdl, path, ZFS_TYPE_SNAPSHOT, B_TRUE))
3736                 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3737
3738         (void) strlcpy(fsname, path, sizeof (fsname));
3739         cp = strchr(fsname, '@');
3740         *cp = '\0';
3741         sd.sd_snapname = cp + 1;
3742
3743         if ((zhp = zfs_open(hdl, fsname, ZFS_TYPE_FILESYSTEM |
3744             ZFS_TYPE_VOLUME)) == NULL) {
3745                 return (-1);
3746         }
3747
3748         verify(nvlist_alloc(&sd.sd_nvl, NV_UNIQUE_NAME, 0) == 0);
3749         if (recursive) {
3750                 (void) zfs_snapshot_cb(zfs_handle_dup(zhp), &sd);
3751         } else {
3752                 fnvlist_add_boolean(sd.sd_nvl, path);
3753         }
3754
3755         ret = zfs_snapshot_nvl(hdl, sd.sd_nvl, props);
3756         nvlist_free(sd.sd_nvl);
3757         zfs_close(zhp);
3758         return (ret);
3759 }
3760
3761 /*
3762  * Destroy any more recent snapshots.  We invoke this callback on any dependents
3763  * of the snapshot first.  If the 'cb_dependent' member is non-zero, then this
3764  * is a dependent and we should just destroy it without checking the transaction
3765  * group.
3766  */
3767 typedef struct rollback_data {
3768         const char      *cb_target;             /* the snapshot */
3769         uint64_t        cb_create;              /* creation time reference */
3770         boolean_t       cb_error;
3771         boolean_t       cb_force;
3772 } rollback_data_t;
3773
3774 static int
3775 rollback_destroy_dependent(zfs_handle_t *zhp, void *data)
3776 {
3777         rollback_data_t *cbp = data;
3778         prop_changelist_t *clp;
3779
3780         /* We must destroy this clone; first unmount it */
3781         clp = changelist_gather(zhp, ZFS_PROP_NAME, 0,
3782             cbp->cb_force ? MS_FORCE: 0);
3783         if (clp == NULL || changelist_prefix(clp) != 0) {
3784                 cbp->cb_error = B_TRUE;
3785                 zfs_close(zhp);
3786                 return (0);
3787         }
3788         if (zfs_destroy(zhp, B_FALSE) != 0)
3789                 cbp->cb_error = B_TRUE;
3790         else
3791                 changelist_remove(clp, zhp->zfs_name);
3792         (void) changelist_postfix(clp);
3793         changelist_free(clp);
3794
3795         zfs_close(zhp);
3796         return (0);
3797 }
3798
3799 static int
3800 rollback_destroy(zfs_handle_t *zhp, void *data)
3801 {
3802         rollback_data_t *cbp = data;
3803
3804         if (zfs_prop_get_int(zhp, ZFS_PROP_CREATETXG) > cbp->cb_create) {
3805                 cbp->cb_error |= zfs_iter_dependents(zhp, B_FALSE,
3806                     rollback_destroy_dependent, cbp);
3807
3808                 cbp->cb_error |= zfs_destroy(zhp, B_FALSE);
3809         }
3810
3811         zfs_close(zhp);
3812         return (0);
3813 }
3814
3815 /*
3816  * Given a dataset, rollback to a specific snapshot, discarding any
3817  * data changes since then and making it the active dataset.
3818  *
3819  * Any snapshots and bookmarks more recent than the target are
3820  * destroyed, along with their dependents (i.e. clones).
3821  */
3822 int
3823 zfs_rollback(zfs_handle_t *zhp, zfs_handle_t *snap, boolean_t force)
3824 {
3825         rollback_data_t cb = { 0 };
3826         int err;
3827         boolean_t restore_resv = 0;
3828         uint64_t old_volsize, new_volsize;
3829         zfs_prop_t resv_prop;
3830
3831         assert(zhp->zfs_type == ZFS_TYPE_FILESYSTEM ||
3832             zhp->zfs_type == ZFS_TYPE_VOLUME);
3833
3834         /*
3835          * Destroy all recent snapshots and their dependents.
3836          */
3837         cb.cb_force = force;
3838         cb.cb_target = snap->zfs_name;
3839         cb.cb_create = zfs_prop_get_int(snap, ZFS_PROP_CREATETXG);
3840         (void) zfs_iter_snapshots(zhp, B_FALSE, rollback_destroy, &cb);
3841         (void) zfs_iter_bookmarks(zhp, rollback_destroy, &cb);
3842
3843         if (cb.cb_error)
3844                 return (-1);
3845
3846         /*
3847          * Now that we have verified that the snapshot is the latest,
3848          * rollback to the given snapshot.
3849          */
3850
3851         if (zhp->zfs_type == ZFS_TYPE_VOLUME) {
3852                 if (zfs_which_resv_prop(zhp, &resv_prop) < 0)
3853                         return (-1);
3854                 old_volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE);
3855                 restore_resv =
3856                     (old_volsize == zfs_prop_get_int(zhp, resv_prop));
3857         }
3858
3859         /*
3860          * We rely on zfs_iter_children() to verify that there are no
3861          * newer snapshots for the given dataset.  Therefore, we can
3862          * simply pass the name on to the ioctl() call.  There is still
3863          * an unlikely race condition where the user has taken a
3864          * snapshot since we verified that this was the most recent.
3865          */
3866         err = lzc_rollback(zhp->zfs_name, NULL, 0);
3867         if (err != 0) {
3868                 (void) zfs_standard_error_fmt(zhp->zfs_hdl, errno,
3869                     dgettext(TEXT_DOMAIN, "cannot rollback '%s'"),
3870                     zhp->zfs_name);
3871                 return (err);
3872         }
3873
3874         /*
3875          * For volumes, if the pre-rollback volsize matched the pre-
3876          * rollback reservation and the volsize has changed then set
3877          * the reservation property to the post-rollback volsize.
3878          * Make a new handle since the rollback closed the dataset.
3879          */
3880         if ((zhp->zfs_type == ZFS_TYPE_VOLUME) &&
3881             (zhp = make_dataset_handle(zhp->zfs_hdl, zhp->zfs_name))) {
3882                 if (restore_resv) {
3883                         new_volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE);
3884                         if (old_volsize != new_volsize)
3885                                 err = zfs_prop_set_int(zhp, resv_prop,
3886                                     new_volsize);
3887                 }
3888                 zfs_close(zhp);
3889         }
3890         return (err);
3891 }
3892
3893 /*
3894  * Renames the given dataset.
3895  */
3896 int
3897 zfs_rename(zfs_handle_t *zhp, const char *source, const char *target,
3898     renameflags_t flags)
3899 {
3900         int ret = 0;
3901         zfs_cmd_t zc = { 0 };
3902         char *delim;
3903         prop_changelist_t *cl = NULL;
3904         zfs_handle_t *zhrp = NULL;
3905         char *parentname = NULL;
3906         char parent[ZFS_MAXNAMELEN];
3907         char property[ZFS_MAXPROPLEN];
3908         libzfs_handle_t *hdl = zhp->zfs_hdl;
3909         char errbuf[1024];
3910
3911         /* if we have the same exact name, just return success */
3912         if (strcmp(zhp->zfs_name, target) == 0)
3913                 return (0);
3914
3915         (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3916             "cannot rename to '%s'"), target);
3917
3918         if (source != NULL) {
3919                 /*
3920                  * This is recursive snapshots rename, put snapshot name
3921                  * (that might not exist) into zfs_name.
3922                  */
3923                 assert(flags.recurse);
3924
3925                 (void) strlcat(zhp->zfs_name, "@", sizeof(zhp->zfs_name));
3926                 (void) strlcat(zhp->zfs_name, source, sizeof(zhp->zfs_name));
3927                 zhp->zfs_type = ZFS_TYPE_SNAPSHOT;
3928         }
3929
3930         /*
3931          * Make sure the target name is valid
3932          */
3933         if (zhp->zfs_type == ZFS_TYPE_SNAPSHOT) {
3934                 if ((strchr(target, '@') == NULL) ||
3935                     *target == '@') {
3936                         /*
3937                          * Snapshot target name is abbreviated,
3938                          * reconstruct full dataset name
3939                          */
3940                         (void) strlcpy(parent, zhp->zfs_name,
3941                             sizeof (parent));
3942                         delim = strchr(parent, '@');
3943                         if (strchr(target, '@') == NULL)
3944                                 *(++delim) = '\0';
3945                         else
3946                                 *delim = '\0';
3947                         (void) strlcat(parent, target, sizeof (parent));
3948                         target = parent;
3949                 } else {
3950                         /*
3951                          * Make sure we're renaming within the same dataset.
3952                          */
3953                         delim = strchr(target, '@');
3954                         if (strncmp(zhp->zfs_name, target, delim - target)
3955                             != 0 || zhp->zfs_name[delim - target] != '@') {
3956                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3957                                     "snapshots must be part of same "
3958                                     "dataset"));
3959                                 return (zfs_error(hdl, EZFS_CROSSTARGET,
3960                                     errbuf));
3961                         }
3962                 }
3963                 if (!zfs_validate_name(hdl, target, zhp->zfs_type, B_TRUE))
3964                         return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3965         } else {
3966                 if (flags.recurse) {
3967                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3968                             "recursive rename must be a snapshot"));
3969                         return (zfs_error(hdl, EZFS_BADTYPE, errbuf));
3970                 }
3971
3972                 if (!zfs_validate_name(hdl, target, zhp->zfs_type, B_TRUE))
3973                         return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3974
3975                 /* validate parents */
3976                 if (check_parents(hdl, target, NULL, B_FALSE, NULL) != 0)
3977                         return (-1);
3978
3979                 /* make sure we're in the same pool */
3980                 verify((delim = strchr(target, '/')) != NULL);
3981                 if (strncmp(zhp->zfs_name, target, delim - target) != 0 ||
3982                     zhp->zfs_name[delim - target] != '/') {
3983                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3984                             "datasets must be within same pool"));
3985                         return (zfs_error(hdl, EZFS_CROSSTARGET, errbuf));
3986                 }
3987
3988                 /* new name cannot be a child of the current dataset name */
3989                 if (is_descendant(zhp->zfs_name, target)) {
3990                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3991                             "New dataset name cannot be a descendant of "
3992                             "current dataset name"));
3993                         return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3994                 }
3995         }
3996
3997         (void) snprintf(errbuf, sizeof (errbuf),
3998             dgettext(TEXT_DOMAIN, "cannot rename '%s'"), zhp->zfs_name);
3999
4000         if (getzoneid() == GLOBAL_ZONEID &&
4001             zfs_prop_get_int(zhp, ZFS_PROP_ZONED)) {
4002                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4003                     "dataset is used in a non-global zone"));
4004                 return (zfs_error(hdl, EZFS_ZONED, errbuf));
4005         }
4006
4007         /*
4008          * Avoid unmounting file systems with mountpoint property set to
4009          * 'legacy' or 'none' even if -u option is not given.
4010          */
4011         if (zhp->zfs_type == ZFS_TYPE_FILESYSTEM &&
4012             !flags.recurse && !flags.nounmount &&
4013             zfs_prop_get(zhp, ZFS_PROP_MOUNTPOINT, property,
4014             sizeof (property), NULL, NULL, 0, B_FALSE) == 0 &&
4015             (strcmp(property, "legacy") == 0 ||
4016              strcmp(property, "none") == 0)) {
4017                 flags.nounmount = B_TRUE;
4018         }
4019         if (flags.recurse) {
4020
4021                 parentname = zfs_strdup(zhp->zfs_hdl, zhp->zfs_name);
4022                 if (parentname == NULL) {
4023                         ret = -1;
4024                         goto error;
4025                 }
4026                 delim = strchr(parentname, '@');
4027                 *delim = '\0';
4028                 zhrp = zfs_open(zhp->zfs_hdl, parentname, ZFS_TYPE_DATASET);
4029                 if (zhrp == NULL) {
4030                         ret = -1;
4031                         goto error;
4032                 }
4033         } else if (zhp->zfs_type != ZFS_TYPE_SNAPSHOT) {
4034                 if ((cl = changelist_gather(zhp, ZFS_PROP_NAME,
4035                     flags.nounmount ? CL_GATHER_DONT_UNMOUNT : 0,
4036                     flags.forceunmount ? MS_FORCE : 0)) == NULL) {
4037                         return (-1);
4038                 }
4039
4040                 if (changelist_haszonedchild(cl)) {
4041                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4042                             "child dataset with inherited mountpoint is used "
4043                             "in a non-global zone"));
4044                         (void) zfs_error(hdl, EZFS_ZONED, errbuf);
4045                         goto error;
4046                 }
4047
4048                 if ((ret = changelist_prefix(cl)) != 0)
4049                         goto error;
4050         }
4051
4052         if (ZFS_IS_VOLUME(zhp))
4053                 zc.zc_objset_type = DMU_OST_ZVOL;
4054         else
4055                 zc.zc_objset_type = DMU_OST_ZFS;
4056
4057         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
4058         (void) strlcpy(zc.zc_value, target, sizeof (zc.zc_value));
4059
4060         zc.zc_cookie = flags.recurse ? 1 : 0;
4061         if (flags.nounmount)
4062                 zc.zc_cookie |= 2;
4063
4064         if ((ret = zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_RENAME, &zc)) != 0) {
4065                 /*
4066                  * if it was recursive, the one that actually failed will
4067                  * be in zc.zc_name
4068                  */
4069                 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
4070                     "cannot rename '%s'"), zc.zc_name);
4071
4072                 if (flags.recurse && errno == EEXIST) {
4073                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4074                             "a child dataset already has a snapshot "
4075                             "with the new name"));
4076                         (void) zfs_error(hdl, EZFS_EXISTS, errbuf);
4077                 } else {
4078                         (void) zfs_standard_error(zhp->zfs_hdl, errno, errbuf);
4079                 }
4080
4081                 /*
4082                  * On failure, we still want to remount any filesystems that
4083                  * were previously mounted, so we don't alter the system state.
4084                  */
4085                 if (cl != NULL)
4086                         (void) changelist_postfix(cl);
4087         } else {
4088                 if (cl != NULL) {
4089                         changelist_rename(cl, zfs_get_name(zhp), target);
4090                         ret = changelist_postfix(cl);
4091                 }
4092         }
4093
4094 error:
4095         if (parentname != NULL) {
4096                 free(parentname);
4097         }
4098         if (zhrp != NULL) {
4099                 zfs_close(zhrp);
4100         }
4101         if (cl != NULL) {
4102                 changelist_free(cl);
4103         }
4104         return (ret);
4105 }
4106
4107 nvlist_t *
4108 zfs_get_user_props(zfs_handle_t *zhp)
4109 {
4110         return (zhp->zfs_user_props);
4111 }
4112
4113 nvlist_t *
4114 zfs_get_recvd_props(zfs_handle_t *zhp)
4115 {
4116         if (zhp->zfs_recvd_props == NULL)
4117                 if (get_recvd_props_ioctl(zhp) != 0)
4118                         return (NULL);
4119         return (zhp->zfs_recvd_props);
4120 }
4121
4122 /*
4123  * This function is used by 'zfs list' to determine the exact set of columns to
4124  * display, and their maximum widths.  This does two main things:
4125  *
4126  *      - If this is a list of all properties, then expand the list to include
4127  *        all native properties, and set a flag so that for each dataset we look
4128  *        for new unique user properties and add them to the list.
4129  *
4130  *      - For non fixed-width properties, keep track of the maximum width seen
4131  *        so that we can size the column appropriately. If the user has
4132  *        requested received property values, we also need to compute the width
4133  *        of the RECEIVED column.
4134  */
4135 int
4136 zfs_expand_proplist(zfs_handle_t *zhp, zprop_list_t **plp, boolean_t received,
4137     boolean_t literal)
4138 {
4139         libzfs_handle_t *hdl = zhp->zfs_hdl;
4140         zprop_list_t *entry;
4141         zprop_list_t **last, **start;
4142         nvlist_t *userprops, *propval;
4143         nvpair_t *elem;
4144         char *strval;
4145         char buf[ZFS_MAXPROPLEN];
4146
4147         if (zprop_expand_list(hdl, plp, ZFS_TYPE_DATASET) != 0)
4148                 return (-1);
4149
4150         userprops = zfs_get_user_props(zhp);
4151
4152         entry = *plp;
4153         if (entry->pl_all && nvlist_next_nvpair(userprops, NULL) != NULL) {
4154                 /*
4155                  * Go through and add any user properties as necessary.  We
4156                  * start by incrementing our list pointer to the first
4157                  * non-native property.
4158                  */
4159                 start = plp;
4160                 while (*start != NULL) {
4161                         if ((*start)->pl_prop == ZPROP_INVAL)
4162                                 break;
4163                         start = &(*start)->pl_next;
4164                 }
4165
4166                 elem = NULL;
4167                 while ((elem = nvlist_next_nvpair(userprops, elem)) != NULL) {
4168                         /*
4169                          * See if we've already found this property in our list.
4170                          */
4171                         for (last = start; *last != NULL;
4172                             last = &(*last)->pl_next) {
4173                                 if (strcmp((*last)->pl_user_prop,
4174                                     nvpair_name(elem)) == 0)
4175                                         break;
4176                         }
4177
4178                         if (*last == NULL) {
4179                                 if ((entry = zfs_alloc(hdl,
4180                                     sizeof (zprop_list_t))) == NULL ||
4181                                     ((entry->pl_user_prop = zfs_strdup(hdl,
4182                                     nvpair_name(elem)))) == NULL) {
4183                                         free(entry);
4184                                         return (-1);
4185                                 }
4186
4187                                 entry->pl_prop = ZPROP_INVAL;
4188                                 entry->pl_width = strlen(nvpair_name(elem));
4189                                 entry->pl_all = B_TRUE;
4190                                 *last = entry;
4191                         }
4192                 }
4193         }
4194
4195         /*
4196          * Now go through and check the width of any non-fixed columns
4197          */
4198         for (entry = *plp; entry != NULL; entry = entry->pl_next) {
4199                 if (entry->pl_fixed && !literal)
4200                         continue;
4201
4202                 if (entry->pl_prop != ZPROP_INVAL) {
4203                         if (zfs_prop_get(zhp, entry->pl_prop,
4204                             buf, sizeof (buf), NULL, NULL, 0, literal) == 0) {
4205                                 if (strlen(buf) > entry->pl_width)
4206                                         entry->pl_width = strlen(buf);
4207                         }
4208                         if (received && zfs_prop_get_recvd(zhp,
4209                             zfs_prop_to_name(entry->pl_prop),
4210                             buf, sizeof (buf), literal) == 0)
4211                                 if (strlen(buf) > entry->pl_recvd_width)
4212                                         entry->pl_recvd_width = strlen(buf);
4213                 } else {
4214                         if (nvlist_lookup_nvlist(userprops, entry->pl_user_prop,
4215                             &propval) == 0) {
4216                                 verify(nvlist_lookup_string(propval,
4217                                     ZPROP_VALUE, &strval) == 0);
4218                                 if (strlen(strval) > entry->pl_width)
4219                                         entry->pl_width = strlen(strval);
4220                         }
4221                         if (received && zfs_prop_get_recvd(zhp,
4222                             entry->pl_user_prop,
4223                             buf, sizeof (buf), literal) == 0)
4224                                 if (strlen(buf) > entry->pl_recvd_width)
4225                                         entry->pl_recvd_width = strlen(buf);
4226                 }
4227         }
4228
4229         return (0);
4230 }
4231
4232 int
4233 zfs_deleg_share_nfs(libzfs_handle_t *hdl, char *dataset, char *path,
4234     char *resource, void *export, void *sharetab,
4235     int sharemax, zfs_share_op_t operation)
4236 {
4237         zfs_cmd_t zc = { 0 };
4238         int error;
4239
4240         (void) strlcpy(zc.zc_name, dataset, sizeof (zc.zc_name));
4241         (void) strlcpy(zc.zc_value, path, sizeof (zc.zc_value));
4242         if (resource)
4243                 (void) strlcpy(zc.zc_string, resource, sizeof (zc.zc_string));
4244         zc.zc_share.z_sharedata = (uint64_t)(uintptr_t)sharetab;
4245         zc.zc_share.z_exportdata = (uint64_t)(uintptr_t)export;
4246         zc.zc_share.z_sharetype = operation;
4247         zc.zc_share.z_sharemax = sharemax;
4248         error = ioctl(hdl->libzfs_fd, ZFS_IOC_SHARE, &zc);
4249         return (error);
4250 }
4251
4252 void
4253 zfs_prune_proplist(zfs_handle_t *zhp, uint8_t *props)
4254 {
4255         nvpair_t *curr;
4256
4257         /*
4258          * Keep a reference to the props-table against which we prune the
4259          * properties.
4260          */
4261         zhp->zfs_props_table = props;
4262
4263         curr = nvlist_next_nvpair(zhp->zfs_props, NULL);
4264
4265         while (curr) {
4266                 zfs_prop_t zfs_prop = zfs_name_to_prop(nvpair_name(curr));
4267                 nvpair_t *next = nvlist_next_nvpair(zhp->zfs_props, curr);
4268
4269                 /*
4270                  * User properties will result in ZPROP_INVAL, and since we
4271                  * only know how to prune standard ZFS properties, we always
4272                  * leave these in the list.  This can also happen if we
4273                  * encounter an unknown DSL property (when running older
4274                  * software, for example).
4275                  */
4276                 if (zfs_prop != ZPROP_INVAL && props[zfs_prop] == B_FALSE)
4277                         (void) nvlist_remove(zhp->zfs_props,
4278                             nvpair_name(curr), nvpair_type(curr));
4279                 curr = next;
4280         }
4281 }
4282
4283 #ifdef illumos
4284 static int
4285 zfs_smb_acl_mgmt(libzfs_handle_t *hdl, char *dataset, char *path,
4286     zfs_smb_acl_op_t cmd, char *resource1, char *resource2)
4287 {
4288         zfs_cmd_t zc = { 0 };
4289         nvlist_t *nvlist = NULL;
4290         int error;
4291
4292         (void) strlcpy(zc.zc_name, dataset, sizeof (zc.zc_name));
4293         (void) strlcpy(zc.zc_value, path, sizeof (zc.zc_value));
4294         zc.zc_cookie = (uint64_t)cmd;
4295
4296         if (cmd == ZFS_SMB_ACL_RENAME) {
4297                 if (nvlist_alloc(&nvlist, NV_UNIQUE_NAME, 0) != 0) {
4298                         (void) no_memory(hdl);
4299                         return (0);
4300                 }
4301         }
4302
4303         switch (cmd) {
4304         case ZFS_SMB_ACL_ADD:
4305         case ZFS_SMB_ACL_REMOVE:
4306                 (void) strlcpy(zc.zc_string, resource1, sizeof (zc.zc_string));
4307                 break;
4308         case ZFS_SMB_ACL_RENAME:
4309                 if (nvlist_add_string(nvlist, ZFS_SMB_ACL_SRC,
4310                     resource1) != 0) {
4311                                 (void) no_memory(hdl);
4312                                 return (-1);
4313                 }
4314                 if (nvlist_add_string(nvlist, ZFS_SMB_ACL_TARGET,
4315                     resource2) != 0) {
4316                                 (void) no_memory(hdl);
4317                                 return (-1);
4318                 }
4319                 if (zcmd_write_src_nvlist(hdl, &zc, nvlist) != 0) {
4320                         nvlist_free(nvlist);
4321                         return (-1);
4322                 }
4323                 break;
4324         case ZFS_SMB_ACL_PURGE:
4325                 break;
4326         default:
4327                 return (-1);
4328         }
4329         error = ioctl(hdl->libzfs_fd, ZFS_IOC_SMB_ACL, &zc);
4330         nvlist_free(nvlist);
4331         return (error);
4332 }
4333
4334 int
4335 zfs_smb_acl_add(libzfs_handle_t *hdl, char *dataset,
4336     char *path, char *resource)
4337 {
4338         return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_ADD,
4339             resource, NULL));
4340 }
4341
4342 int
4343 zfs_smb_acl_remove(libzfs_handle_t *hdl, char *dataset,
4344     char *path, char *resource)
4345 {
4346         return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_REMOVE,
4347             resource, NULL));
4348 }
4349
4350 int
4351 zfs_smb_acl_purge(libzfs_handle_t *hdl, char *dataset, char *path)
4352 {
4353         return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_PURGE,
4354             NULL, NULL));
4355 }
4356
4357 int
4358 zfs_smb_acl_rename(libzfs_handle_t *hdl, char *dataset, char *path,
4359     char *oldname, char *newname)
4360 {
4361         return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_RENAME,
4362             oldname, newname));
4363 }
4364 #endif  /* illumos */
4365
4366 int
4367 zfs_userspace(zfs_handle_t *zhp, zfs_userquota_prop_t type,
4368     zfs_userspace_cb_t func, void *arg)
4369 {
4370         zfs_cmd_t zc = { 0 };
4371         zfs_useracct_t buf[100];
4372         libzfs_handle_t *hdl = zhp->zfs_hdl;
4373         int ret;
4374
4375         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
4376
4377         zc.zc_objset_type = type;
4378         zc.zc_nvlist_dst = (uintptr_t)buf;
4379
4380         for (;;) {
4381                 zfs_useracct_t *zua = buf;
4382
4383                 zc.zc_nvlist_dst_size = sizeof (buf);
4384                 if (zfs_ioctl(hdl, ZFS_IOC_USERSPACE_MANY, &zc) != 0) {
4385                         char errbuf[1024];
4386
4387                         (void) snprintf(errbuf, sizeof (errbuf),
4388                             dgettext(TEXT_DOMAIN,
4389                             "cannot get used/quota for %s"), zc.zc_name);
4390                         return (zfs_standard_error_fmt(hdl, errno, errbuf));
4391                 }
4392                 if (zc.zc_nvlist_dst_size == 0)
4393                         break;
4394
4395                 while (zc.zc_nvlist_dst_size > 0) {
4396                         if ((ret = func(arg, zua->zu_domain, zua->zu_rid,
4397                             zua->zu_space)) != 0)
4398                                 return (ret);
4399                         zua++;
4400                         zc.zc_nvlist_dst_size -= sizeof (zfs_useracct_t);
4401                 }
4402         }
4403
4404         return (0);
4405 }
4406
4407 struct holdarg {
4408         nvlist_t *nvl;
4409         const char *snapname;
4410         const char *tag;
4411         boolean_t recursive;
4412         int error;
4413 };
4414
4415 static int
4416 zfs_hold_one(zfs_handle_t *zhp, void *arg)
4417 {
4418         struct holdarg *ha = arg;
4419         char name[ZFS_MAXNAMELEN];
4420         int rv = 0;
4421
4422         (void) snprintf(name, sizeof (name),
4423             "%s@%s", zhp->zfs_name, ha->snapname);
4424
4425         if (lzc_exists(name))
4426                 fnvlist_add_string(ha->nvl, name, ha->tag);
4427
4428         if (ha->recursive)
4429                 rv = zfs_iter_filesystems(zhp, zfs_hold_one, ha);
4430         zfs_close(zhp);
4431         return (rv);
4432 }
4433
4434 int
4435 zfs_hold(zfs_handle_t *zhp, const char *snapname, const char *tag,
4436     boolean_t recursive, int cleanup_fd)
4437 {
4438         int ret;
4439         struct holdarg ha;
4440
4441         ha.nvl = fnvlist_alloc();
4442         ha.snapname = snapname;
4443         ha.tag = tag;
4444         ha.recursive = recursive;
4445         (void) zfs_hold_one(zfs_handle_dup(zhp), &ha);
4446
4447         if (nvlist_empty(ha.nvl)) {
4448                 char errbuf[1024];
4449
4450                 fnvlist_free(ha.nvl);
4451                 ret = ENOENT;
4452                 (void) snprintf(errbuf, sizeof (errbuf),
4453                     dgettext(TEXT_DOMAIN,
4454                     "cannot hold snapshot '%s@%s'"),
4455                     zhp->zfs_name, snapname);
4456                 (void) zfs_standard_error(zhp->zfs_hdl, ret, errbuf);
4457                 return (ret);
4458         }
4459
4460         ret = zfs_hold_nvl(zhp, cleanup_fd, ha.nvl);
4461         fnvlist_free(ha.nvl);
4462
4463         return (ret);
4464 }
4465
4466 int
4467 zfs_hold_nvl(zfs_handle_t *zhp, int cleanup_fd, nvlist_t *holds)
4468 {
4469         int ret;
4470         nvlist_t *errors;
4471         libzfs_handle_t *hdl = zhp->zfs_hdl;
4472         char errbuf[1024];
4473         nvpair_t *elem;
4474
4475         errors = NULL;
4476         ret = lzc_hold(holds, cleanup_fd, &errors);
4477
4478         if (ret == 0) {
4479                 /* There may be errors even in the success case. */
4480                 fnvlist_free(errors);
4481                 return (0);
4482         }
4483
4484         if (nvlist_empty(errors)) {
4485                 /* no hold-specific errors */
4486                 (void) snprintf(errbuf, sizeof (errbuf),
4487                     dgettext(TEXT_DOMAIN, "cannot hold"));
4488                 switch (ret) {
4489                 case ENOTSUP:
4490                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4491                             "pool must be upgraded"));
4492                         (void) zfs_error(hdl, EZFS_BADVERSION, errbuf);
4493                         break;
4494                 case EINVAL:
4495                         (void) zfs_error(hdl, EZFS_BADTYPE, errbuf);
4496                         break;
4497                 default:
4498                         (void) zfs_standard_error(hdl, ret, errbuf);
4499                 }
4500         }
4501
4502         for (elem = nvlist_next_nvpair(errors, NULL);
4503             elem != NULL;
4504             elem = nvlist_next_nvpair(errors, elem)) {
4505                 (void) snprintf(errbuf, sizeof (errbuf),
4506                     dgettext(TEXT_DOMAIN,
4507                     "cannot hold snapshot '%s'"), nvpair_name(elem));
4508                 switch (fnvpair_value_int32(elem)) {
4509                 case E2BIG:
4510                         /*
4511                          * Temporary tags wind up having the ds object id
4512                          * prepended. So even if we passed the length check
4513                          * above, it's still possible for the tag to wind
4514                          * up being slightly too long.
4515                          */
4516                         (void) zfs_error(hdl, EZFS_TAGTOOLONG, errbuf);
4517                         break;
4518                 case EINVAL:
4519                         (void) zfs_error(hdl, EZFS_BADTYPE, errbuf);
4520                         break;
4521                 case EEXIST:
4522                         (void) zfs_error(hdl, EZFS_REFTAG_HOLD, errbuf);
4523                         break;
4524                 default:
4525                         (void) zfs_standard_error(hdl,
4526                             fnvpair_value_int32(elem), errbuf);
4527                 }
4528         }
4529
4530         fnvlist_free(errors);
4531         return (ret);
4532 }
4533
4534 static int
4535 zfs_release_one(zfs_handle_t *zhp, void *arg)
4536 {
4537         struct holdarg *ha = arg;
4538         char name[ZFS_MAXNAMELEN];
4539         int rv = 0;
4540         nvlist_t *existing_holds;
4541
4542         (void) snprintf(name, sizeof (name),
4543             "%s@%s", zhp->zfs_name, ha->snapname);
4544
4545         if (lzc_get_holds(name, &existing_holds) != 0) {
4546                 ha->error = ENOENT;
4547         } else if (!nvlist_exists(existing_holds, ha->tag)) {
4548                 ha->error = ESRCH;
4549         } else {
4550                 nvlist_t *torelease = fnvlist_alloc();
4551                 fnvlist_add_boolean(torelease, ha->tag);
4552                 fnvlist_add_nvlist(ha->nvl, name, torelease);
4553                 fnvlist_free(torelease);
4554         }
4555
4556         if (ha->recursive)
4557                 rv = zfs_iter_filesystems(zhp, zfs_release_one, ha);
4558         zfs_close(zhp);
4559         return (rv);
4560 }
4561
4562 int
4563 zfs_release(zfs_handle_t *zhp, const char *snapname, const char *tag,
4564     boolean_t recursive)
4565 {
4566         int ret;
4567         struct holdarg ha;
4568         nvlist_t *errors = NULL;
4569         nvpair_t *elem;
4570         libzfs_handle_t *hdl = zhp->zfs_hdl;
4571         char errbuf[1024];
4572
4573         ha.nvl = fnvlist_alloc();
4574         ha.snapname = snapname;
4575         ha.tag = tag;
4576         ha.recursive = recursive;
4577         ha.error = 0;
4578         (void) zfs_release_one(zfs_handle_dup(zhp), &ha);
4579
4580         if (nvlist_empty(ha.nvl)) {
4581                 fnvlist_free(ha.nvl);
4582                 ret = ha.error;
4583                 (void) snprintf(errbuf, sizeof (errbuf),
4584                     dgettext(TEXT_DOMAIN,
4585                     "cannot release hold from snapshot '%s@%s'"),
4586                     zhp->zfs_name, snapname);
4587                 if (ret == ESRCH) {
4588                         (void) zfs_error(hdl, EZFS_REFTAG_RELE, errbuf);
4589                 } else {
4590                         (void) zfs_standard_error(hdl, ret, errbuf);
4591                 }
4592                 return (ret);
4593         }
4594
4595         ret = lzc_release(ha.nvl, &errors);
4596         fnvlist_free(ha.nvl);
4597
4598         if (ret == 0) {
4599                 /* There may be errors even in the success case. */
4600                 fnvlist_free(errors);
4601                 return (0);
4602         }
4603
4604         if (nvlist_empty(errors)) {
4605                 /* no hold-specific errors */
4606                 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
4607                     "cannot release"));
4608                 switch (errno) {
4609                 case ENOTSUP:
4610                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4611                             "pool must be upgraded"));
4612                         (void) zfs_error(hdl, EZFS_BADVERSION, errbuf);
4613                         break;
4614                 default:
4615                         (void) zfs_standard_error_fmt(hdl, errno, errbuf);
4616                 }
4617         }
4618
4619         for (elem = nvlist_next_nvpair(errors, NULL);
4620             elem != NULL;
4621             elem = nvlist_next_nvpair(errors, elem)) {
4622                 (void) snprintf(errbuf, sizeof (errbuf),
4623                     dgettext(TEXT_DOMAIN,
4624                     "cannot release hold from snapshot '%s'"),
4625                     nvpair_name(elem));
4626                 switch (fnvpair_value_int32(elem)) {
4627                 case ESRCH:
4628                         (void) zfs_error(hdl, EZFS_REFTAG_RELE, errbuf);
4629                         break;
4630                 case EINVAL:
4631                         (void) zfs_error(hdl, EZFS_BADTYPE, errbuf);
4632                         break;
4633                 default:
4634                         (void) zfs_standard_error_fmt(hdl,
4635                             fnvpair_value_int32(elem), errbuf);
4636                 }
4637         }
4638
4639         fnvlist_free(errors);
4640         return (ret);
4641 }
4642
4643 int
4644 zfs_get_fsacl(zfs_handle_t *zhp, nvlist_t **nvl)
4645 {
4646         zfs_cmd_t zc = { 0 };
4647         libzfs_handle_t *hdl = zhp->zfs_hdl;
4648         int nvsz = 2048;
4649         void *nvbuf;
4650         int err = 0;
4651         char errbuf[1024];
4652
4653         assert(zhp->zfs_type == ZFS_TYPE_VOLUME ||
4654             zhp->zfs_type == ZFS_TYPE_FILESYSTEM);
4655
4656 tryagain:
4657
4658         nvbuf = malloc(nvsz);
4659         if (nvbuf == NULL) {
4660                 err = (zfs_error(hdl, EZFS_NOMEM, strerror(errno)));
4661                 goto out;
4662         }
4663
4664         zc.zc_nvlist_dst_size = nvsz;
4665         zc.zc_nvlist_dst = (uintptr_t)nvbuf;
4666
4667         (void) strlcpy(zc.zc_name, zhp->zfs_name, ZFS_MAXNAMELEN);
4668
4669         if (ioctl(hdl->libzfs_fd, ZFS_IOC_GET_FSACL, &zc) != 0) {
4670                 (void) snprintf(errbuf, sizeof (errbuf),
4671                     dgettext(TEXT_DOMAIN, "cannot get permissions on '%s'"),
4672                     zc.zc_name);
4673                 switch (errno) {
4674                 case ENOMEM:
4675                         free(nvbuf);
4676                         nvsz = zc.zc_nvlist_dst_size;
4677                         goto tryagain;
4678
4679                 case ENOTSUP:
4680                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4681                             "pool must be upgraded"));
4682                         err = zfs_error(hdl, EZFS_BADVERSION, errbuf);
4683                         break;
4684                 case EINVAL:
4685                         err = zfs_error(hdl, EZFS_BADTYPE, errbuf);
4686                         break;
4687                 case ENOENT:
4688                         err = zfs_error(hdl, EZFS_NOENT, errbuf);
4689                         break;
4690                 default:
4691                         err = zfs_standard_error_fmt(hdl, errno, errbuf);
4692                         break;
4693                 }
4694         } else {
4695                 /* success */
4696                 int rc = nvlist_unpack(nvbuf, zc.zc_nvlist_dst_size, nvl, 0);
4697                 if (rc) {
4698                         (void) snprintf(errbuf, sizeof (errbuf), dgettext(
4699                             TEXT_DOMAIN, "cannot get permissions on '%s'"),
4700                             zc.zc_name);
4701                         err = zfs_standard_error_fmt(hdl, rc, errbuf);
4702                 }
4703         }
4704
4705         free(nvbuf);
4706 out:
4707         return (err);
4708 }
4709
4710 int
4711 zfs_set_fsacl(zfs_handle_t *zhp, boolean_t un, nvlist_t *nvl)
4712 {
4713         zfs_cmd_t zc = { 0 };
4714         libzfs_handle_t *hdl = zhp->zfs_hdl;
4715         char *nvbuf;
4716         char errbuf[1024];
4717         size_t nvsz;
4718         int err;
4719
4720         assert(zhp->zfs_type == ZFS_TYPE_VOLUME ||
4721             zhp->zfs_type == ZFS_TYPE_FILESYSTEM);
4722
4723         err = nvlist_size(nvl, &nvsz, NV_ENCODE_NATIVE);
4724         assert(err == 0);
4725
4726         nvbuf = malloc(nvsz);
4727
4728         err = nvlist_pack(nvl, &nvbuf, &nvsz, NV_ENCODE_NATIVE, 0);
4729         assert(err == 0);
4730
4731         zc.zc_nvlist_src_size = nvsz;
4732         zc.zc_nvlist_src = (uintptr_t)nvbuf;
4733         zc.zc_perm_action = un;
4734
4735         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
4736
4737         if (zfs_ioctl(hdl, ZFS_IOC_SET_FSACL, &zc) != 0) {
4738                 (void) snprintf(errbuf, sizeof (errbuf),
4739                     dgettext(TEXT_DOMAIN, "cannot set permissions on '%s'"),
4740                     zc.zc_name);
4741                 switch (errno) {
4742                 case ENOTSUP:
4743                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4744                             "pool must be upgraded"));
4745                         err = zfs_error(hdl, EZFS_BADVERSION, errbuf);
4746                         break;
4747                 case EINVAL:
4748                         err = zfs_error(hdl, EZFS_BADTYPE, errbuf);
4749                         break;
4750                 case ENOENT:
4751                         err = zfs_error(hdl, EZFS_NOENT, errbuf);
4752                         break;
4753                 default:
4754                         err = zfs_standard_error_fmt(hdl, errno, errbuf);
4755                         break;
4756                 }
4757         }
4758
4759         free(nvbuf);
4760
4761         return (err);
4762 }
4763
4764 int
4765 zfs_get_holds(zfs_handle_t *zhp, nvlist_t **nvl)
4766 {
4767         int err;
4768         char errbuf[1024];
4769
4770         err = lzc_get_holds(zhp->zfs_name, nvl);
4771
4772         if (err != 0) {
4773                 libzfs_handle_t *hdl = zhp->zfs_hdl;
4774
4775                 (void) snprintf(errbuf, sizeof (errbuf),
4776                     dgettext(TEXT_DOMAIN, "cannot get holds for '%s'"),
4777                     zhp->zfs_name);
4778                 switch (err) {
4779                 case ENOTSUP:
4780                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4781                             "pool must be upgraded"));
4782                         err = zfs_error(hdl, EZFS_BADVERSION, errbuf);
4783                         break;
4784                 case EINVAL:
4785                         err = zfs_error(hdl, EZFS_BADTYPE, errbuf);
4786                         break;
4787                 case ENOENT:
4788                         err = zfs_error(hdl, EZFS_NOENT, errbuf);
4789                         break;
4790                 default:
4791                         err = zfs_standard_error_fmt(hdl, errno, errbuf);
4792                         break;
4793                 }
4794         }
4795
4796         return (err);
4797 }
4798
4799 /*
4800  * Convert the zvol's volume size to an appropriate reservation.
4801  * Note: If this routine is updated, it is necessary to update the ZFS test
4802  * suite's shell version in reservation.kshlib.
4803  */
4804 uint64_t
4805 zvol_volsize_to_reservation(uint64_t volsize, nvlist_t *props)
4806 {
4807         uint64_t numdb;
4808         uint64_t nblocks, volblocksize;
4809         int ncopies;
4810         char *strval;
4811
4812         if (nvlist_lookup_string(props,
4813             zfs_prop_to_name(ZFS_PROP_COPIES), &strval) == 0)
4814                 ncopies = atoi(strval);
4815         else
4816                 ncopies = 1;
4817         if (nvlist_lookup_uint64(props,
4818             zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE),
4819             &volblocksize) != 0)
4820                 volblocksize = ZVOL_DEFAULT_BLOCKSIZE;
4821         nblocks = volsize/volblocksize;
4822         /* start with metadnode L0-L6 */
4823         numdb = 7;
4824         /* calculate number of indirects */
4825         while (nblocks > 1) {
4826                 nblocks += DNODES_PER_LEVEL - 1;
4827                 nblocks /= DNODES_PER_LEVEL;
4828                 numdb += nblocks;
4829         }
4830         numdb *= MIN(SPA_DVAS_PER_BP, ncopies + 1);
4831         volsize *= ncopies;
4832         /*
4833          * this is exactly DN_MAX_INDBLKSHIFT when metadata isn't
4834          * compressed, but in practice they compress down to about
4835          * 1100 bytes
4836          */
4837         numdb *= 1ULL << DN_MAX_INDBLKSHIFT;
4838         volsize += numdb;
4839         return (volsize);
4840 }
4841
4842 /*
4843  * Attach/detach the given filesystem to/from the given jail.
4844  */
4845 int
4846 zfs_jail(zfs_handle_t *zhp, int jailid, int attach)
4847 {
4848         libzfs_handle_t *hdl = zhp->zfs_hdl;
4849         zfs_cmd_t zc = { 0 };
4850         char errbuf[1024];
4851         unsigned long cmd;
4852         int ret;
4853
4854         if (attach) {
4855                 (void) snprintf(errbuf, sizeof (errbuf),
4856                     dgettext(TEXT_DOMAIN, "cannot jail '%s'"), zhp->zfs_name);
4857         } else {
4858                 (void) snprintf(errbuf, sizeof (errbuf),
4859                     dgettext(TEXT_DOMAIN, "cannot unjail '%s'"), zhp->zfs_name);
4860         }
4861
4862         switch (zhp->zfs_type) {
4863         case ZFS_TYPE_VOLUME:
4864                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4865                     "volumes can not be jailed"));
4866                 return (zfs_error(hdl, EZFS_BADTYPE, errbuf));
4867         case ZFS_TYPE_SNAPSHOT:
4868                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4869                     "snapshots can not be jailed"));
4870                 return (zfs_error(hdl, EZFS_BADTYPE, errbuf));
4871         }
4872         assert(zhp->zfs_type == ZFS_TYPE_FILESYSTEM);
4873
4874         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
4875         zc.zc_objset_type = DMU_OST_ZFS;
4876         zc.zc_jailid = jailid;
4877
4878         cmd = attach ? ZFS_IOC_JAIL : ZFS_IOC_UNJAIL;
4879         if ((ret = ioctl(hdl->libzfs_fd, cmd, &zc)) != 0)
4880                 zfs_standard_error(hdl, errno, errbuf);
4881
4882         return (ret);
4883 }