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 <pawel@dawidek.net>.
  28  * All rights reserved.
  29  * Copyright (c) 2012 Martin Matuska <mm@FreeBSD.org>. All rights reserved.
  30  * Copyright (c) 2013 Steven Hartland. All rights reserved.
  31  * Copyright 2013 Nexenta Systems, Inc.  All rights reserved.
  32  * Copyright (c) 2014 Integros [integros.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         }
  83
  84         return (NULL);
  85 }
  86
  87 /*
  88  * Given a path and mask of ZFS types, return a string describing this dataset.
  89  * This is used when we fail to open a dataset and we cannot get an exact type.
  90  * We guess what the type would have been based on the path and the mask of
  91  * acceptable types.
  92  */
  93 static const char *
  94 path_to_str(const char *path, int types)
  95 {
  96         /*
  97          * When given a single type, always report the exact type.
  98          */
  99         if (types == ZFS_TYPE_SNAPSHOT)
 100                 return (dgettext(TEXT_DOMAIN, "snapshot"));
 101         if (types == ZFS_TYPE_FILESYSTEM)
 102                 return (dgettext(TEXT_DOMAIN, "filesystem"));
 103         if (types == ZFS_TYPE_VOLUME)
 104                 return (dgettext(TEXT_DOMAIN, "volume"));
 105
 106         /*
 107          * The user is requesting more than one type of dataset.  If this is the
 108          * case, consult the path itself.  If we're looking for a snapshot, and
 109          * a '@' is found, then report it as "snapshot".  Otherwise, remove the
 110          * snapshot attribute and try again.
 111          */
 112         if (types & ZFS_TYPE_SNAPSHOT) {
 113                 if (strchr(path, '@') != NULL)
 114                         return (dgettext(TEXT_DOMAIN, "snapshot"));
 115                 return (path_to_str(path, types & ~ZFS_TYPE_SNAPSHOT));
 116         }
 117
 118         /*
 119          * The user has requested either filesystems or volumes.
 120          * We have no way of knowing a priori what type this would be, so always
 121          * report it as "filesystem" or "volume", our two primitive types.
 122          */
 123         if (types & ZFS_TYPE_FILESYSTEM)
 124                 return (dgettext(TEXT_DOMAIN, "filesystem"));
 125
 126         assert(types & ZFS_TYPE_VOLUME);
 127         return (dgettext(TEXT_DOMAIN, "volume"));
 128 }
 129
 130 /*
 131  * Validate a ZFS path.  This is used even before trying to open the dataset, to
 132  * provide a more meaningful error message.  We call zfs_error_aux() to
 133  * explain exactly why the name was not valid.
 134  */
 135 int
 136 zfs_validate_name(libzfs_handle_t *hdl, const char *path, int type,
 137     boolean_t modifying)
 138 {
 139         namecheck_err_t why;
 140         char what;
 141
 142         (void) zfs_prop_get_table();
 143         if (dataset_namecheck(path, &why, &what) != 0) {
 144                 if (hdl != NULL) {
 145                         switch (why) {
 146                         case NAME_ERR_TOOLONG:
 147                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 148                                     "name is too long"));
 149                                 break;
 150
 151                         case NAME_ERR_LEADING_SLASH:
 152                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 153                                     "leading slash in name"));
 154                                 break;
 155
 156                         case NAME_ERR_EMPTY_COMPONENT:
 157                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 158                                     "empty component in name"));
 159                                 break;
 160
 161                         case NAME_ERR_TRAILING_SLASH:
 162                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 163                                     "trailing slash in name"));
 164                                 break;
 165
 166                         case NAME_ERR_INVALCHAR:
 167                                 zfs_error_aux(hdl,
 168                                     dgettext(TEXT_DOMAIN, "invalid character "
 169                                     "'%c' in name"), what);
 170                                 break;
 171
 172                         case NAME_ERR_MULTIPLE_AT:
 173                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 174                                     "multiple '@' delimiters in name"));
 175                                 break;
 176
 177                         case NAME_ERR_NOLETTER:
 178                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 179                                     "pool doesn't begin with a letter"));
 180                                 break;
 181
 182                         case NAME_ERR_RESERVED:
 183                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 184                                     "name is reserved"));
 185                                 break;
 186
 187                         case NAME_ERR_DISKLIKE:
 188                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 189                                     "reserved disk name"));
 190                                 break;
 191                         }
 192                 }
 193
 194                 return (0);
 195         }
 196
 197         if (!(type & ZFS_TYPE_SNAPSHOT) && strchr(path, '@') != NULL) {
 198                 if (hdl != NULL)
 199                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 200                             "snapshot delimiter '@' in filesystem name"));
 201                 return (0);
 202         }
 203
 204         if (type == ZFS_TYPE_SNAPSHOT && strchr(path, '@') == NULL) {
 205                 if (hdl != NULL)
 206                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 207                             "missing '@' delimiter in snapshot name"));
 208                 return (0);
 209         }
 210
 211         if (modifying && strchr(path, '%') != NULL) {
 212                 if (hdl != NULL)
 213                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 214                             "invalid character %c in name"), '%');
 215                 return (0);
 216         }
 217
 218         return (-1);
 219 }
 220
 221 int
 222 zfs_name_valid(const char *name, zfs_type_t type)
 223 {
 224         if (type == ZFS_TYPE_POOL)
 225                 return (zpool_name_valid(NULL, B_FALSE, name));
 226         return (zfs_validate_name(NULL, name, type, B_FALSE));
 227 }
 228
 229 /*
 230  * This function takes the raw DSL properties, and filters out the user-defined
 231  * properties into a separate nvlist.
 232  */
 233 static nvlist_t *
 234 process_user_props(zfs_handle_t *zhp, nvlist_t *props)
 235 {
 236         libzfs_handle_t *hdl = zhp->zfs_hdl;
 237         nvpair_t *elem;
 238         nvlist_t *propval;
 239         nvlist_t *nvl;
 240
 241         if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0) != 0) {
 242                 (void) no_memory(hdl);
 243                 return (NULL);
 244         }
 245
 246         elem = NULL;
 247         while ((elem = nvlist_next_nvpair(props, elem)) != NULL) {
 248                 if (!zfs_prop_user(nvpair_name(elem)))
 249                         continue;
 250
 251                 verify(nvpair_value_nvlist(elem, &propval) == 0);
 252                 if (nvlist_add_nvlist(nvl, nvpair_name(elem), propval) != 0) {
 253                         nvlist_free(nvl);
 254                         (void) no_memory(hdl);
 255                         return (NULL);
 256                 }
 257         }
 258
 259         return (nvl);
 260 }
 261
 262 static zpool_handle_t *
 263 zpool_add_handle(zfs_handle_t *zhp, const char *pool_name)
 264 {
 265         libzfs_handle_t *hdl = zhp->zfs_hdl;
 266         zpool_handle_t *zph;
 267
 268         if ((zph = zpool_open_canfail(hdl, pool_name)) != NULL) {
 269                 if (hdl->libzfs_pool_handles != NULL)
 270                         zph->zpool_next = hdl->libzfs_pool_handles;
 271                 hdl->libzfs_pool_handles = zph;
 272         }
 273         return (zph);
 274 }
 275
 276 static zpool_handle_t *
 277 zpool_find_handle(zfs_handle_t *zhp, const char *pool_name, int len)
 278 {
 279         libzfs_handle_t *hdl = zhp->zfs_hdl;
 280         zpool_handle_t *zph = hdl->libzfs_pool_handles;
 281
 282         while ((zph != NULL) &&
 283             (strncmp(pool_name, zpool_get_name(zph), len) != 0))
 284                 zph = zph->zpool_next;
 285         return (zph);
 286 }
 287
 288 /*
 289  * Returns a handle to the pool that contains the provided dataset.
 290  * If a handle to that pool already exists then that handle is returned.
 291  * Otherwise, a new handle is created and added to the list of handles.
 292  */
 293 static zpool_handle_t *
 294 zpool_handle(zfs_handle_t *zhp)
 295 {
 296         char *pool_name;
 297         int len;
 298         zpool_handle_t *zph;
 299
 300         len = strcspn(zhp->zfs_name, "/@#") + 1;
 301         pool_name = zfs_alloc(zhp->zfs_hdl, len);
 302         (void) strlcpy(pool_name, zhp->zfs_name, len);
 303
 304         zph = zpool_find_handle(zhp, pool_name, len);
 305         if (zph == NULL)
 306                 zph = zpool_add_handle(zhp, pool_name);
 307
 308         free(pool_name);
 309         return (zph);
 310 }
 311
 312 void
 313 zpool_free_handles(libzfs_handle_t *hdl)
 314 {
 315         zpool_handle_t *next, *zph = hdl->libzfs_pool_handles;
 316
 317         while (zph != NULL) {
 318                 next = zph->zpool_next;
 319                 zpool_close(zph);
 320                 zph = next;
 321         }
 322         hdl->libzfs_pool_handles = NULL;
 323 }
 324
 325 /*
 326  * Utility function to gather stats (objset and zpl) for the given object.
 327  */
 328 static int
 329 get_stats_ioctl(zfs_handle_t *zhp, zfs_cmd_t *zc)
 330 {
 331         libzfs_handle_t *hdl = zhp->zfs_hdl;
 332
 333         (void) strlcpy(zc->zc_name, zhp->zfs_name, sizeof (zc->zc_name));
 334
 335         while (ioctl(hdl->libzfs_fd, ZFS_IOC_OBJSET_STATS, zc) != 0) {
 336                 if (errno == ENOMEM) {
 337                         if (zcmd_expand_dst_nvlist(hdl, zc) != 0) {
 338                                 return (-1);
 339                         }
 340                 } else {
 341                         return (-1);
 342                 }
 343         }
 344         return (0);
 345 }
 346
 347 /*
 348  * Utility function to get the received properties of the given object.
 349  */
 350 static int
 351 get_recvd_props_ioctl(zfs_handle_t *zhp)
 352 {
 353         libzfs_handle_t *hdl = zhp->zfs_hdl;
 354         nvlist_t *recvdprops;
 355         zfs_cmd_t zc = { 0 };
 356         int err;
 357
 358         if (zcmd_alloc_dst_nvlist(hdl, &zc, 0) != 0)
 359                 return (-1);
 360
 361         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
 362
 363         while (ioctl(hdl->libzfs_fd, ZFS_IOC_OBJSET_RECVD_PROPS, &zc) != 0) {
 364                 if (errno == ENOMEM) {
 365                         if (zcmd_expand_dst_nvlist(hdl, &zc) != 0) {
 366                                 return (-1);
 367                         }
 368                 } else {
 369                         zcmd_free_nvlists(&zc);
 370                         return (-1);
 371                 }
 372         }
 373
 374         err = zcmd_read_dst_nvlist(zhp->zfs_hdl, &zc, &recvdprops);
 375         zcmd_free_nvlists(&zc);
 376         if (err != 0)
 377                 return (-1);
 378
 379         nvlist_free(zhp->zfs_recvd_props);
 380         zhp->zfs_recvd_props = recvdprops;
 381
 382         return (0);
 383 }
 384
 385 static int
 386 put_stats_zhdl(zfs_handle_t *zhp, zfs_cmd_t *zc)
 387 {
 388         nvlist_t *allprops, *userprops;
 389
 390         zhp->zfs_dmustats = zc->zc_objset_stats; /* structure assignment */
 391
 392         if (zcmd_read_dst_nvlist(zhp->zfs_hdl, zc, &allprops) != 0) {
 393                 return (-1);
 394         }
 395
 396         /*
 397          * XXX Why do we store the user props separately, in addition to
 398          * storing them in zfs_props?
 399          */
 400         if ((userprops = process_user_props(zhp, allprops)) == NULL) {
 401                 nvlist_free(allprops);
 402                 return (-1);
 403         }
 404
 405         nvlist_free(zhp->zfs_props);
 406         nvlist_free(zhp->zfs_user_props);
 407
 408         zhp->zfs_props = allprops;
 409         zhp->zfs_user_props = userprops;
 410
 411         return (0);
 412 }
 413
 414 static int
 415 get_stats(zfs_handle_t *zhp)
 416 {
 417         int rc = 0;
 418         zfs_cmd_t zc = { 0 };
 419
 420         if (zcmd_alloc_dst_nvlist(zhp->zfs_hdl, &zc, 0) != 0)
 421                 return (-1);
 422         if (get_stats_ioctl(zhp, &zc) != 0)
 423                 rc = -1;
 424         else if (put_stats_zhdl(zhp, &zc) != 0)
 425                 rc = -1;
 426         zcmd_free_nvlists(&zc);
 427         return (rc);
 428 }
 429
 430 /*
 431  * Refresh the properties currently stored in the handle.
 432  */
 433 void
 434 zfs_refresh_properties(zfs_handle_t *zhp)
 435 {
 436         (void) get_stats(zhp);
 437 }
 438
 439 /*
 440  * Makes a handle from the given dataset name.  Used by zfs_open() and
 441  * zfs_iter_* to create child handles on the fly.
 442  */
 443 static int
 444 make_dataset_handle_common(zfs_handle_t *zhp, zfs_cmd_t *zc)
 445 {
 446         if (put_stats_zhdl(zhp, zc) != 0)
 447                 return (-1);
 448
 449         /*
 450          * We've managed to open the dataset and gather statistics.  Determine
 451          * the high-level type.
 452          */
 453         if (zhp->zfs_dmustats.dds_type == DMU_OST_ZVOL)
 454                 zhp->zfs_head_type = ZFS_TYPE_VOLUME;
 455         else if (zhp->zfs_dmustats.dds_type == DMU_OST_ZFS)
 456                 zhp->zfs_head_type = ZFS_TYPE_FILESYSTEM;
 457         else
 458                 abort();
 459
 460         if (zhp->zfs_dmustats.dds_is_snapshot)
 461                 zhp->zfs_type = ZFS_TYPE_SNAPSHOT;
 462         else if (zhp->zfs_dmustats.dds_type == DMU_OST_ZVOL)
 463                 zhp->zfs_type = ZFS_TYPE_VOLUME;
 464         else if (zhp->zfs_dmustats.dds_type == DMU_OST_ZFS)
 465                 zhp->zfs_type = ZFS_TYPE_FILESYSTEM;
 466         else
 467                 abort();        /* we should never see any other types */
 468
 469         if ((zhp->zpool_hdl = zpool_handle(zhp)) == NULL)
 470                 return (-1);
 471
 472         return (0);
 473 }
 474
 475 zfs_handle_t *
 476 make_dataset_handle(libzfs_handle_t *hdl, const char *path)
 477 {
 478         zfs_cmd_t zc = { 0 };
 479
 480         zfs_handle_t *zhp = calloc(sizeof (zfs_handle_t), 1);
 481
 482         if (zhp == NULL)
 483                 return (NULL);
 484
 485         zhp->zfs_hdl = hdl;
 486         (void) strlcpy(zhp->zfs_name, path, sizeof (zhp->zfs_name));
 487         if (zcmd_alloc_dst_nvlist(hdl, &zc, 0) != 0) {
 488                 free(zhp);
 489                 return (NULL);
 490         }
 491         if (get_stats_ioctl(zhp, &zc) == -1) {
 492                 zcmd_free_nvlists(&zc);
 493                 free(zhp);
 494                 return (NULL);
 495         }
 496         if (make_dataset_handle_common(zhp, &zc) == -1) {
 497                 free(zhp);
 498                 zhp = NULL;
 499         }
 500         zcmd_free_nvlists(&zc);
 501         return (zhp);
 502 }
 503
 504 zfs_handle_t *
 505 make_dataset_handle_zc(libzfs_handle_t *hdl, zfs_cmd_t *zc)
 506 {
 507         zfs_handle_t *zhp = calloc(sizeof (zfs_handle_t), 1);
 508
 509         if (zhp == NULL)
 510                 return (NULL);
 511
 512         zhp->zfs_hdl = hdl;
 513         (void) strlcpy(zhp->zfs_name, zc->zc_name, sizeof (zhp->zfs_name));
 514         if (make_dataset_handle_common(zhp, zc) == -1) {
 515                 free(zhp);
 516                 return (NULL);
 517         }
 518         return (zhp);
 519 }
 520
 521 zfs_handle_t *
 522 make_dataset_simple_handle_zc(zfs_handle_t *pzhp, zfs_cmd_t *zc)
 523 {
 524         zfs_handle_t *zhp = calloc(sizeof (zfs_handle_t), 1);
 525
 526         if (zhp == NULL)
 527                 return (NULL);
 528
 529         zhp->zfs_hdl = pzhp->zfs_hdl;
 530         (void) strlcpy(zhp->zfs_name, zc->zc_name, sizeof (zhp->zfs_name));
 531         zhp->zfs_head_type = pzhp->zfs_type;
 532         zhp->zfs_type = ZFS_TYPE_SNAPSHOT;
 533         zhp->zpool_hdl = zpool_handle(zhp);
 534         return (zhp);
 535 }
 536
 537 zfs_handle_t *
 538 zfs_handle_dup(zfs_handle_t *zhp_orig)
 539 {
 540         zfs_handle_t *zhp = calloc(sizeof (zfs_handle_t), 1);
 541
 542         if (zhp == NULL)
 543                 return (NULL);
 544
 545         zhp->zfs_hdl = zhp_orig->zfs_hdl;
 546         zhp->zpool_hdl = zhp_orig->zpool_hdl;
 547         (void) strlcpy(zhp->zfs_name, zhp_orig->zfs_name,
 548             sizeof (zhp->zfs_name));
 549         zhp->zfs_type = zhp_orig->zfs_type;
 550         zhp->zfs_head_type = zhp_orig->zfs_head_type;
 551         zhp->zfs_dmustats = zhp_orig->zfs_dmustats;
 552         if (zhp_orig->zfs_props != NULL) {
 553                 if (nvlist_dup(zhp_orig->zfs_props, &zhp->zfs_props, 0) != 0) {
 554                         (void) no_memory(zhp->zfs_hdl);
 555                         zfs_close(zhp);
 556                         return (NULL);
 557                 }
 558         }
 559         if (zhp_orig->zfs_user_props != NULL) {
 560                 if (nvlist_dup(zhp_orig->zfs_user_props,
 561                     &zhp->zfs_user_props, 0) != 0) {
 562                         (void) no_memory(zhp->zfs_hdl);
 563                         zfs_close(zhp);
 564                         return (NULL);
 565                 }
 566         }
 567         if (zhp_orig->zfs_recvd_props != NULL) {
 568                 if (nvlist_dup(zhp_orig->zfs_recvd_props,
 569                     &zhp->zfs_recvd_props, 0)) {
 570                         (void) no_memory(zhp->zfs_hdl);
 571                         zfs_close(zhp);
 572                         return (NULL);
 573                 }
 574         }
 575         zhp->zfs_mntcheck = zhp_orig->zfs_mntcheck;
 576         if (zhp_orig->zfs_mntopts != NULL) {
 577                 zhp->zfs_mntopts = zfs_strdup(zhp_orig->zfs_hdl,
 578                     zhp_orig->zfs_mntopts);
 579         }
 580         zhp->zfs_props_table = zhp_orig->zfs_props_table;
 581         return (zhp);
 582 }
 583
 584 boolean_t
 585 zfs_bookmark_exists(const char *path)
 586 {
 587         nvlist_t *bmarks;
 588         nvlist_t *props;
 589         char fsname[ZFS_MAXNAMELEN];
 590         char *bmark_name;
 591         char *pound;
 592         int err;
 593         boolean_t rv;
 594
 595
 596         (void) strlcpy(fsname, path, sizeof (fsname));
 597         pound = strchr(fsname, '#');
 598         if (pound == NULL)
 599                 return (B_FALSE);
 600
 601         *pound = '\0';
 602         bmark_name = pound + 1;
 603         props = fnvlist_alloc();
 604         err = lzc_get_bookmarks(fsname, props, &bmarks);
 605         nvlist_free(props);
 606         if (err != 0) {
 607                 nvlist_free(bmarks);
 608                 return (B_FALSE);
 609         }
 610
 611         rv = nvlist_exists(bmarks, bmark_name);
 612         nvlist_free(bmarks);
 613         return (rv);
 614 }
 615
 616 zfs_handle_t *
 617 make_bookmark_handle(zfs_handle_t *parent, const char *path,
 618     nvlist_t *bmark_props)
 619 {
 620         zfs_handle_t *zhp = calloc(sizeof (zfs_handle_t), 1);
 621
 622         if (zhp == NULL)
 623                 return (NULL);
 624
 625         /* Fill in the name. */
 626         zhp->zfs_hdl = parent->zfs_hdl;
 627         (void) strlcpy(zhp->zfs_name, path, sizeof (zhp->zfs_name));
 628
 629         /* Set the property lists. */
 630         if (nvlist_dup(bmark_props, &zhp->zfs_props, 0) != 0) {
 631                 free(zhp);
 632                 return (NULL);
 633         }
 634
 635         /* Set the types. */
 636         zhp->zfs_head_type = parent->zfs_head_type;
 637         zhp->zfs_type = ZFS_TYPE_BOOKMARK;
 638
 639         if ((zhp->zpool_hdl = zpool_handle(zhp)) == NULL) {
 640                 nvlist_free(zhp->zfs_props);
 641                 free(zhp);
 642                 return (NULL);
 643         }
 644
 645         return (zhp);
 646 }
 647
 648 /*
 649  * Opens the given snapshot, filesystem, or volume.   The 'types'
 650  * argument is a mask of acceptable types.  The function will print an
 651  * appropriate error message and return NULL if it can't be opened.
 652  */
 653 zfs_handle_t *
 654 zfs_open(libzfs_handle_t *hdl, const char *path, int types)
 655 {
 656         zfs_handle_t *zhp;
 657         char errbuf[1024];
 658
 659         (void) snprintf(errbuf, sizeof (errbuf),
 660             dgettext(TEXT_DOMAIN, "cannot open '%s'"), path);
 661
 662         /*
 663          * Validate the name before we even try to open it.
 664          */
 665         if (!zfs_validate_name(hdl, path, ZFS_TYPE_DATASET, B_FALSE)) {
 666                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 667                     "invalid dataset name"));
 668                 (void) zfs_error(hdl, EZFS_INVALIDNAME, errbuf);
 669                 return (NULL);
 670         }
 671
 672         /*
 673          * Try to get stats for the dataset, which will tell us if it exists.
 674          */
 675         errno = 0;
 676         if ((zhp = make_dataset_handle(hdl, path)) == NULL) {
 677                 (void) zfs_standard_error(hdl, errno, errbuf);
 678                 return (NULL);
 679         }
 680
 681         if (zhp == NULL) {
 682                 char *at = strchr(path, '@');
 683
 684                 if (at != NULL)
 685                         *at = '\0';
 686                 errno = 0;
 687                 if ((zhp = make_dataset_handle(hdl, path)) == NULL) {
 688                         (void) zfs_standard_error(hdl, errno, errbuf);
 689                         return (NULL);
 690                 }
 691                 if (at != NULL)
 692                         *at = '@';
 693                 (void) strlcpy(zhp->zfs_name, path, sizeof (zhp->zfs_name));
 694                 zhp->zfs_type = ZFS_TYPE_SNAPSHOT;
 695         }
 696
 697         if (!(types & zhp->zfs_type)) {
 698                 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf);
 699                 zfs_close(zhp);
 700                 return (NULL);
 701         }
 702
 703         return (zhp);
 704 }
 705
 706 /*
 707  * Release a ZFS handle.  Nothing to do but free the associated memory.
 708  */
 709 void
 710 zfs_close(zfs_handle_t *zhp)
 711 {
 712         if (zhp->zfs_mntopts)
 713                 free(zhp->zfs_mntopts);
 714         nvlist_free(zhp->zfs_props);
 715         nvlist_free(zhp->zfs_user_props);
 716         nvlist_free(zhp->zfs_recvd_props);
 717         free(zhp);
 718 }
 719
 720 typedef struct mnttab_node {
 721         struct mnttab mtn_mt;
 722         avl_node_t mtn_node;
 723 } mnttab_node_t;
 724
 725 static int
 726 libzfs_mnttab_cache_compare(const void *arg1, const void *arg2)
 727 {
 728         const mnttab_node_t *mtn1 = arg1;
 729         const mnttab_node_t *mtn2 = arg2;
 730         int rv;
 731
 732         rv = strcmp(mtn1->mtn_mt.mnt_special, mtn2->mtn_mt.mnt_special);
 733
 734         if (rv == 0)
 735                 return (0);
 736         return (rv > 0 ? 1 : -1);
 737 }
 738
 739 void
 740 libzfs_mnttab_init(libzfs_handle_t *hdl)
 741 {
 742         assert(avl_numnodes(&hdl->libzfs_mnttab_cache) == 0);
 743         avl_create(&hdl->libzfs_mnttab_cache, libzfs_mnttab_cache_compare,
 744             sizeof (mnttab_node_t), offsetof(mnttab_node_t, mtn_node));
 745 }
 746
 747 void
 748 libzfs_mnttab_update(libzfs_handle_t *hdl)
 749 {
 750         struct mnttab entry;
 751
 752         rewind(hdl->libzfs_mnttab);
 753         while (getmntent(hdl->libzfs_mnttab, &entry) == 0) {
 754                 mnttab_node_t *mtn;
 755
 756                 if (strcmp(entry.mnt_fstype, MNTTYPE_ZFS) != 0)
 757                         continue;
 758                 mtn = zfs_alloc(hdl, sizeof (mnttab_node_t));
 759                 mtn->mtn_mt.mnt_special = zfs_strdup(hdl, entry.mnt_special);
 760                 mtn->mtn_mt.mnt_mountp = zfs_strdup(hdl, entry.mnt_mountp);
 761                 mtn->mtn_mt.mnt_fstype = zfs_strdup(hdl, entry.mnt_fstype);
 762                 mtn->mtn_mt.mnt_mntopts = zfs_strdup(hdl, entry.mnt_mntopts);
 763                 avl_add(&hdl->libzfs_mnttab_cache, mtn);
 764         }
 765 }
 766
 767 void
 768 libzfs_mnttab_fini(libzfs_handle_t *hdl)
 769 {
 770         void *cookie = NULL;
 771         mnttab_node_t *mtn;
 772
 773         while (mtn = avl_destroy_nodes(&hdl->libzfs_mnttab_cache, &cookie)) {
 774                 free(mtn->mtn_mt.mnt_special);
 775                 free(mtn->mtn_mt.mnt_mountp);
 776                 free(mtn->mtn_mt.mnt_fstype);
 777                 free(mtn->mtn_mt.mnt_mntopts);
 778                 free(mtn);
 779         }
 780         avl_destroy(&hdl->libzfs_mnttab_cache);
 781 }
 782
 783 void
 784 libzfs_mnttab_cache(libzfs_handle_t *hdl, boolean_t enable)
 785 {
 786         hdl->libzfs_mnttab_enable = enable;
 787 }
 788
 789 int
 790 libzfs_mnttab_find(libzfs_handle_t *hdl, const char *fsname,
 791     struct mnttab *entry)
 792 {
 793         mnttab_node_t find;
 794         mnttab_node_t *mtn;
 795
 796         if (!hdl->libzfs_mnttab_enable) {
 797                 struct mnttab srch = { 0 };
 798
 799                 if (avl_numnodes(&hdl->libzfs_mnttab_cache))
 800                         libzfs_mnttab_fini(hdl);
 801                 rewind(hdl->libzfs_mnttab);
 802                 srch.mnt_special = (char *)fsname;
 803                 srch.mnt_fstype = MNTTYPE_ZFS;
 804                 if (getmntany(hdl->libzfs_mnttab, entry, &srch) == 0)
 805                         return (0);
 806                 else
 807                         return (ENOENT);
 808         }
 809
 810         if (avl_numnodes(&hdl->libzfs_mnttab_cache) == 0)
 811                 libzfs_mnttab_update(hdl);
 812
 813         find.mtn_mt.mnt_special = (char *)fsname;
 814         mtn = avl_find(&hdl->libzfs_mnttab_cache, &find, NULL);
 815         if (mtn) {
 816                 *entry = mtn->mtn_mt;
 817                 return (0);
 818         }
 819         return (ENOENT);
 820 }
 821
 822 void
 823 libzfs_mnttab_add(libzfs_handle_t *hdl, const char *special,
 824     const char *mountp, const char *mntopts)
 825 {
 826         mnttab_node_t *mtn;
 827
 828         if (avl_numnodes(&hdl->libzfs_mnttab_cache) == 0)
 829                 return;
 830         mtn = zfs_alloc(hdl, sizeof (mnttab_node_t));
 831         mtn->mtn_mt.mnt_special = zfs_strdup(hdl, special);
 832         mtn->mtn_mt.mnt_mountp = zfs_strdup(hdl, mountp);
 833         mtn->mtn_mt.mnt_fstype = zfs_strdup(hdl, MNTTYPE_ZFS);
 834         mtn->mtn_mt.mnt_mntopts = zfs_strdup(hdl, mntopts);
 835         avl_add(&hdl->libzfs_mnttab_cache, mtn);
 836 }
 837
 838 void
 839 libzfs_mnttab_remove(libzfs_handle_t *hdl, const char *fsname)
 840 {
 841         mnttab_node_t find;
 842         mnttab_node_t *ret;
 843
 844         find.mtn_mt.mnt_special = (char *)fsname;
 845         if (ret = avl_find(&hdl->libzfs_mnttab_cache, (void *)&find, NULL)) {
 846                 avl_remove(&hdl->libzfs_mnttab_cache, ret);
 847                 free(ret->mtn_mt.mnt_special);
 848                 free(ret->mtn_mt.mnt_mountp);
 849                 free(ret->mtn_mt.mnt_fstype);
 850                 free(ret->mtn_mt.mnt_mntopts);
 851                 free(ret);
 852         }
 853 }
 854
 855 int
 856 zfs_spa_version(zfs_handle_t *zhp, int *spa_version)
 857 {
 858         zpool_handle_t *zpool_handle = zhp->zpool_hdl;
 859
 860         if (zpool_handle == NULL)
 861                 return (-1);
 862
 863         *spa_version = zpool_get_prop_int(zpool_handle,
 864             ZPOOL_PROP_VERSION, NULL);
 865         return (0);
 866 }
 867
 868 /*
 869  * The choice of reservation property depends on the SPA version.
 870  */
 871 static int
 872 zfs_which_resv_prop(zfs_handle_t *zhp, zfs_prop_t *resv_prop)
 873 {
 874         int spa_version;
 875
 876         if (zfs_spa_version(zhp, &spa_version) < 0)
 877                 return (-1);
 878
 879         if (spa_version >= SPA_VERSION_REFRESERVATION)
 880                 *resv_prop = ZFS_PROP_REFRESERVATION;
 881         else
 882                 *resv_prop = ZFS_PROP_RESERVATION;
 883
 884         return (0);
 885 }
 886
 887 /*
 888  * Given an nvlist of properties to set, validates that they are correct, and
 889  * parses any numeric properties (index, boolean, etc) if they are specified as
 890  * strings.
 891  */
 892 nvlist_t *
 893 zfs_valid_proplist(libzfs_handle_t *hdl, zfs_type_t type, nvlist_t *nvl,
 894     uint64_t zoned, zfs_handle_t *zhp, zpool_handle_t *zpool_hdl,
 895     const char *errbuf)
 896 {
 897         nvpair_t *elem;
 898         uint64_t intval;
 899         char *strval;
 900         zfs_prop_t prop;
 901         nvlist_t *ret;
 902         int chosen_normal = -1;
 903         int chosen_utf = -1;
 904
 905         if (nvlist_alloc(&ret, NV_UNIQUE_NAME, 0) != 0) {
 906                 (void) no_memory(hdl);
 907                 return (NULL);
 908         }
 909
 910         /*
 911          * Make sure this property is valid and applies to this type.
 912          */
 913
 914         elem = NULL;
 915         while ((elem = nvlist_next_nvpair(nvl, elem)) != NULL) {
 916                 const char *propname = nvpair_name(elem);
 917
 918                 prop = zfs_name_to_prop(propname);
 919                 if (prop == ZPROP_INVAL && zfs_prop_user(propname)) {
 920                         /*
 921                          * This is a user property: make sure it's a
 922                          * string, and that it's less than ZAP_MAXNAMELEN.
 923                          */
 924                         if (nvpair_type(elem) != DATA_TYPE_STRING) {
 925                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 926                                     "'%s' must be a string"), propname);
 927                                 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
 928                                 goto error;
 929                         }
 930
 931                         if (strlen(nvpair_name(elem)) >= ZAP_MAXNAMELEN) {
 932                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 933                                     "property name '%s' is too long"),
 934                                     propname);
 935                                 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
 936                                 goto error;
 937                         }
 938
 939                         (void) nvpair_value_string(elem, &strval);
 940                         if (nvlist_add_string(ret, propname, strval) != 0) {
 941                                 (void) no_memory(hdl);
 942                                 goto error;
 943                         }
 944                         continue;
 945                 }
 946
 947                 /*
 948                  * Currently, only user properties can be modified on
 949                  * snapshots.
 950                  */
 951                 if (type == ZFS_TYPE_SNAPSHOT) {
 952                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 953                             "this property can not be modified for snapshots"));
 954                         (void) zfs_error(hdl, EZFS_PROPTYPE, errbuf);
 955                         goto error;
 956                 }
 957
 958                 if (prop == ZPROP_INVAL && zfs_prop_userquota(propname)) {
 959                         zfs_userquota_prop_t uqtype;
 960                         char newpropname[128];
 961                         char domain[128];
 962                         uint64_t rid;
 963                         uint64_t valary[3];
 964
 965                         if (userquota_propname_decode(propname, zoned,
 966                             &uqtype, domain, sizeof (domain), &rid) != 0) {
 967                                 zfs_error_aux(hdl,
 968                                     dgettext(TEXT_DOMAIN,
 969                                     "'%s' has an invalid user/group name"),
 970                                     propname);
 971                                 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
 972                                 goto error;
 973                         }
 974
 975                         if (uqtype != ZFS_PROP_USERQUOTA &&
 976                             uqtype != ZFS_PROP_GROUPQUOTA) {
 977                                 zfs_error_aux(hdl,
 978                                     dgettext(TEXT_DOMAIN, "'%s' is readonly"),
 979                                     propname);
 980                                 (void) zfs_error(hdl, EZFS_PROPREADONLY,
 981                                     errbuf);
 982                                 goto error;
 983                         }
 984
 985                         if (nvpair_type(elem) == DATA_TYPE_STRING) {
 986                                 (void) nvpair_value_string(elem, &strval);
 987                                 if (strcmp(strval, "none") == 0) {
 988                                         intval = 0;
 989                                 } else if (zfs_nicestrtonum(hdl,
 990                                     strval, &intval) != 0) {
 991                                         (void) zfs_error(hdl,
 992                                             EZFS_BADPROP, errbuf);
 993                                         goto error;
 994                                 }
 995                         } else if (nvpair_type(elem) ==
 996                             DATA_TYPE_UINT64) {
 997                                 (void) nvpair_value_uint64(elem, &intval);
 998                                 if (intval == 0) {
 999                                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1000                                             "use 'none' to disable "
1001                                             "userquota/groupquota"));
1002                                         goto error;
1003                                 }
1004                         } else {
1005                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1006                                     "'%s' must be a number"), propname);
1007                                 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1008                                 goto error;
1009                         }
1010
1011                         /*
1012                          * Encode the prop name as
1013                          * userquota@<hex-rid>-domain, to make it easy
1014                          * for the kernel to decode.
1015                          */
1016                         (void) snprintf(newpropname, sizeof (newpropname),
1017                             "%s%llx-%s", zfs_userquota_prop_prefixes[uqtype],
1018                             (longlong_t)rid, domain);
1019                         valary[0] = uqtype;
1020                         valary[1] = rid;
1021                         valary[2] = intval;
1022                         if (nvlist_add_uint64_array(ret, newpropname,
1023                             valary, 3) != 0) {
1024                                 (void) no_memory(hdl);
1025                                 goto error;
1026                         }
1027                         continue;
1028                 } else if (prop == ZPROP_INVAL && zfs_prop_written(propname)) {
1029                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1030                             "'%s' is readonly"),
1031                             propname);
1032                         (void) zfs_error(hdl, EZFS_PROPREADONLY, errbuf);
1033                         goto error;
1034                 }
1035
1036                 if (prop == ZPROP_INVAL) {
1037                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1038                             "invalid property '%s'"), propname);
1039                         (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1040                         goto error;
1041                 }
1042
1043                 if (!zfs_prop_valid_for_type(prop, type)) {
1044                         zfs_error_aux(hdl,
1045                             dgettext(TEXT_DOMAIN, "'%s' does not "
1046                             "apply to datasets of this type"), propname);
1047                         (void) zfs_error(hdl, EZFS_PROPTYPE, errbuf);
1048                         goto error;
1049                 }
1050
1051                 if (zfs_prop_readonly(prop) &&
1052                     (!zfs_prop_setonce(prop) || zhp != NULL)) {
1053                         zfs_error_aux(hdl,
1054                             dgettext(TEXT_DOMAIN, "'%s' is readonly"),
1055                             propname);
1056                         (void) zfs_error(hdl, EZFS_PROPREADONLY, errbuf);
1057                         goto error;
1058                 }
1059
1060                 if (zprop_parse_value(hdl, elem, prop, type, ret,
1061                     &strval, &intval, errbuf) != 0)
1062                         goto error;
1063
1064                 /*
1065                  * Perform some additional checks for specific properties.
1066                  */
1067                 switch (prop) {
1068                 case ZFS_PROP_VERSION:
1069                 {
1070                         int version;
1071
1072                         if (zhp == NULL)
1073                                 break;
1074                         version = zfs_prop_get_int(zhp, ZFS_PROP_VERSION);
1075                         if (intval < version) {
1076                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1077                                     "Can not downgrade; already at version %u"),
1078                                     version);
1079                                 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1080                                 goto error;
1081                         }
1082                         break;
1083                 }
1084
1085                 case ZFS_PROP_VOLBLOCKSIZE:
1086                 case ZFS_PROP_RECORDSIZE:
1087                 {
1088                         int maxbs = SPA_MAXBLOCKSIZE;
1089                         if (zpool_hdl != NULL) {
1090                                 maxbs = zpool_get_prop_int(zpool_hdl,
1091                                     ZPOOL_PROP_MAXBLOCKSIZE, NULL);
1092                         }
1093                         /*
1094                          * Volumes are limited to a volblocksize of 128KB,
1095                          * because they typically service workloads with
1096                          * small random writes, which incur a large performance
1097                          * penalty with large blocks.
1098                          */
1099                         if (prop == ZFS_PROP_VOLBLOCKSIZE)
1100                                 maxbs = SPA_OLD_MAXBLOCKSIZE;
1101                         /*
1102                          * The value must be a power of two between
1103                          * SPA_MINBLOCKSIZE and maxbs.
1104                          */
1105                         if (intval < SPA_MINBLOCKSIZE ||
1106                             intval > maxbs || !ISP2(intval)) {
1107                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1108                                     "'%s' must be power of 2 from 512B "
1109                                     "to %uKB"), propname, maxbs >> 10);
1110                                 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1111                                 goto error;
1112                         }
1113                         break;
1114                 }
1115                 case ZFS_PROP_MLSLABEL:
1116                 {
1117 #ifdef illumos
1118                         /*
1119                          * Verify the mlslabel string and convert to
1120                          * internal hex label string.
1121                          */
1122
1123                         m_label_t *new_sl;
1124                         char *hex = NULL;       /* internal label string */
1125
1126                         /* Default value is already OK. */
1127                         if (strcasecmp(strval, ZFS_MLSLABEL_DEFAULT) == 0)
1128                                 break;
1129
1130                         /* Verify the label can be converted to binary form */
1131                         if (((new_sl = m_label_alloc(MAC_LABEL)) == NULL) ||
1132                             (str_to_label(strval, &new_sl, MAC_LABEL,
1133                             L_NO_CORRECTION, NULL) == -1)) {
1134                                 goto badlabel;
1135                         }
1136
1137                         /* Now translate to hex internal label string */
1138                         if (label_to_str(new_sl, &hex, M_INTERNAL,
1139                             DEF_NAMES) != 0) {
1140                                 if (hex)
1141                                         free(hex);
1142                                 goto badlabel;
1143                         }
1144                         m_label_free(new_sl);
1145
1146                         /* If string is already in internal form, we're done. */
1147                         if (strcmp(strval, hex) == 0) {
1148                                 free(hex);
1149                                 break;
1150                         }
1151
1152                         /* Replace the label string with the internal form. */
1153                         (void) nvlist_remove(ret, zfs_prop_to_name(prop),
1154                             DATA_TYPE_STRING);
1155                         verify(nvlist_add_string(ret, zfs_prop_to_name(prop),
1156                             hex) == 0);
1157                         free(hex);
1158
1159                         break;
1160
1161 badlabel:
1162                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1163                             "invalid mlslabel '%s'"), strval);
1164                         (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1165                         m_label_free(new_sl);   /* OK if null */
1166 #else   /* !illumos */
1167                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1168                             "mlslabel is not supported on FreeBSD"));
1169                         (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1170 #endif  /* illumos */
1171                         goto error;
1172
1173                 }
1174
1175                 case ZFS_PROP_MOUNTPOINT:
1176                 {
1177                         namecheck_err_t why;
1178
1179                         if (strcmp(strval, ZFS_MOUNTPOINT_NONE) == 0 ||
1180                             strcmp(strval, ZFS_MOUNTPOINT_LEGACY) == 0)
1181                                 break;
1182
1183                         if (mountpoint_namecheck(strval, &why)) {
1184                                 switch (why) {
1185                                 case NAME_ERR_LEADING_SLASH:
1186                                         zfs_error_aux(hdl,
1187                                             dgettext(TEXT_DOMAIN,
1188                                             "'%s' must be an absolute path, "
1189                                             "'none', or 'legacy'"), propname);
1190                                         break;
1191                                 case NAME_ERR_TOOLONG:
1192                                         zfs_error_aux(hdl,
1193                                             dgettext(TEXT_DOMAIN,
1194                                             "component of '%s' is too long"),
1195                                             propname);
1196                                         break;
1197                                 }
1198                                 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1199                                 goto error;
1200                         }
1201                 }
1202
1203                         /*FALLTHRU*/
1204
1205                 case ZFS_PROP_SHARESMB:
1206                 case ZFS_PROP_SHARENFS:
1207                         /*
1208                          * For the mountpoint and sharenfs or sharesmb
1209                          * properties, check if it can be set in a
1210                          * global/non-global zone based on
1211                          * the zoned property value:
1212                          *
1213                          *              global zone         non-global zone
1214                          * --------------------------------------------------
1215                          * zoned=on     mountpoint (no)     mountpoint (yes)
1216                          *              sharenfs (no)       sharenfs (no)
1217                          *              sharesmb (no)       sharesmb (no)
1218                          *
1219                          * zoned=off    mountpoint (yes)        N/A
1220                          *              sharenfs (yes)
1221                          *              sharesmb (yes)
1222                          */
1223                         if (zoned) {
1224                                 if (getzoneid() == GLOBAL_ZONEID) {
1225                                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1226                                             "'%s' cannot be set on "
1227                                             "dataset in a non-global zone"),
1228                                             propname);
1229                                         (void) zfs_error(hdl, EZFS_ZONED,
1230                                             errbuf);
1231                                         goto error;
1232                                 } else if (prop == ZFS_PROP_SHARENFS ||
1233                                     prop == ZFS_PROP_SHARESMB) {
1234                                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1235                                             "'%s' cannot be set in "
1236                                             "a non-global zone"), propname);
1237                                         (void) zfs_error(hdl, EZFS_ZONED,
1238                                             errbuf);
1239                                         goto error;
1240                                 }
1241                         } else if (getzoneid() != GLOBAL_ZONEID) {
1242                                 /*
1243                                  * If zoned property is 'off', this must be in
1244                                  * a global zone. If not, something is wrong.
1245                                  */
1246                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1247                                     "'%s' cannot be set while dataset "
1248                                     "'zoned' property is set"), propname);
1249                                 (void) zfs_error(hdl, EZFS_ZONED, errbuf);
1250                                 goto error;
1251                         }
1252
1253                         /*
1254                          * At this point, it is legitimate to set the
1255                          * property. Now we want to make sure that the
1256                          * property value is valid if it is sharenfs.
1257                          */
1258                         if ((prop == ZFS_PROP_SHARENFS ||
1259                             prop == ZFS_PROP_SHARESMB) &&
1260                             strcmp(strval, "on") != 0 &&
1261                             strcmp(strval, "off") != 0) {
1262                                 zfs_share_proto_t proto;
1263
1264                                 if (prop == ZFS_PROP_SHARESMB)
1265                                         proto = PROTO_SMB;
1266                                 else
1267                                         proto = PROTO_NFS;
1268
1269                                 /*
1270                                  * Must be an valid sharing protocol
1271                                  * option string so init the libshare
1272                                  * in order to enable the parser and
1273                                  * then parse the options. We use the
1274                                  * control API since we don't care about
1275                                  * the current configuration and don't
1276                                  * want the overhead of loading it
1277                                  * until we actually do something.
1278                                  */
1279
1280                                 if (zfs_init_libshare(hdl,
1281                                     SA_INIT_CONTROL_API) != SA_OK) {
1282                                         /*
1283                                          * An error occurred so we can't do
1284                                          * anything
1285                                          */
1286                                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1287                                             "'%s' cannot be set: problem "
1288                                             "in share initialization"),
1289                                             propname);
1290                                         (void) zfs_error(hdl, EZFS_BADPROP,
1291                                             errbuf);
1292                                         goto error;
1293                                 }
1294
1295                                 if (zfs_parse_options(strval, proto) != SA_OK) {
1296                                         /*
1297                                          * There was an error in parsing so
1298                                          * deal with it by issuing an error
1299                                          * message and leaving after
1300                                          * uninitializing the the libshare
1301                                          * interface.
1302                                          */
1303                                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1304                                             "'%s' cannot be set to invalid "
1305                                             "options"), propname);
1306                                         (void) zfs_error(hdl, EZFS_BADPROP,
1307                                             errbuf);
1308                                         zfs_uninit_libshare(hdl);
1309                                         goto error;
1310                                 }
1311                                 zfs_uninit_libshare(hdl);
1312                         }
1313
1314                         break;
1315                 case ZFS_PROP_UTF8ONLY:
1316                         chosen_utf = (int)intval;
1317                         break;
1318                 case ZFS_PROP_NORMALIZE:
1319                         chosen_normal = (int)intval;
1320                         break;
1321                 }
1322
1323                 /*
1324                  * For changes to existing volumes, we have some additional
1325                  * checks to enforce.
1326                  */
1327                 if (type == ZFS_TYPE_VOLUME && zhp != NULL) {
1328                         uint64_t volsize = zfs_prop_get_int(zhp,
1329                             ZFS_PROP_VOLSIZE);
1330                         uint64_t blocksize = zfs_prop_get_int(zhp,
1331                             ZFS_PROP_VOLBLOCKSIZE);
1332                         char buf[64];
1333
1334                         switch (prop) {
1335                         case ZFS_PROP_RESERVATION:
1336                         case ZFS_PROP_REFRESERVATION:
1337                                 if (intval > volsize) {
1338                                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1339                                             "'%s' is greater than current "
1340                                             "volume size"), propname);
1341                                         (void) zfs_error(hdl, EZFS_BADPROP,
1342                                             errbuf);
1343                                         goto error;
1344                                 }
1345                                 break;
1346
1347                         case ZFS_PROP_VOLSIZE:
1348                                 if (intval % blocksize != 0) {
1349                                         zfs_nicenum(blocksize, buf,
1350                                             sizeof (buf));
1351                                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1352                                             "'%s' must be a multiple of "
1353                                             "volume block size (%s)"),
1354                                             propname, buf);
1355                                         (void) zfs_error(hdl, EZFS_BADPROP,
1356                                             errbuf);
1357                                         goto error;
1358                                 }
1359
1360                                 if (intval == 0) {
1361                                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1362                                             "'%s' cannot be zero"),
1363                                             propname);
1364                                         (void) zfs_error(hdl, EZFS_BADPROP,
1365                                             errbuf);
1366                                         goto error;
1367                                 }
1368                                 break;
1369                         }
1370                 }
1371         }
1372
1373         /*
1374          * If normalization was chosen, but no UTF8 choice was made,
1375          * enforce rejection of non-UTF8 names.
1376          *
1377          * If normalization was chosen, but rejecting non-UTF8 names
1378          * was explicitly not chosen, it is an error.
1379          */
1380         if (chosen_normal > 0 && chosen_utf < 0) {
1381                 if (nvlist_add_uint64(ret,
1382                     zfs_prop_to_name(ZFS_PROP_UTF8ONLY), 1) != 0) {
1383                         (void) no_memory(hdl);
1384                         goto error;
1385                 }
1386         } else if (chosen_normal > 0 && chosen_utf == 0) {
1387                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1388                     "'%s' must be set 'on' if normalization chosen"),
1389                     zfs_prop_to_name(ZFS_PROP_UTF8ONLY));
1390                 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1391                 goto error;
1392         }
1393         return (ret);
1394
1395 error:
1396         nvlist_free(ret);
1397         return (NULL);
1398 }
1399
1400 int
1401 zfs_add_synthetic_resv(zfs_handle_t *zhp, nvlist_t *nvl)
1402 {
1403         uint64_t old_volsize;
1404         uint64_t new_volsize;
1405         uint64_t old_reservation;
1406         uint64_t new_reservation;
1407         zfs_prop_t resv_prop;
1408         nvlist_t *props;
1409
1410         /*
1411          * If this is an existing volume, and someone is setting the volsize,
1412          * make sure that it matches the reservation, or add it if necessary.
1413          */
1414         old_volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE);
1415         if (zfs_which_resv_prop(zhp, &resv_prop) < 0)
1416                 return (-1);
1417         old_reservation = zfs_prop_get_int(zhp, resv_prop);
1418
1419         props = fnvlist_alloc();
1420         fnvlist_add_uint64(props, zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE),
1421             zfs_prop_get_int(zhp, ZFS_PROP_VOLBLOCKSIZE));
1422
1423         if ((zvol_volsize_to_reservation(old_volsize, props) !=
1424             old_reservation) || nvlist_exists(nvl,
1425             zfs_prop_to_name(resv_prop))) {
1426                 fnvlist_free(props);
1427                 return (0);
1428         }
1429         if (nvlist_lookup_uint64(nvl, zfs_prop_to_name(ZFS_PROP_VOLSIZE),
1430             &new_volsize) != 0) {
1431                 fnvlist_free(props);
1432                 return (-1);
1433         }
1434         new_reservation = zvol_volsize_to_reservation(new_volsize, props);
1435         fnvlist_free(props);
1436
1437         if (nvlist_add_uint64(nvl, zfs_prop_to_name(resv_prop),
1438             new_reservation) != 0) {
1439                 (void) no_memory(zhp->zfs_hdl);
1440                 return (-1);
1441         }
1442         return (1);
1443 }
1444
1445 void
1446 zfs_setprop_error(libzfs_handle_t *hdl, zfs_prop_t prop, int err,
1447     char *errbuf)
1448 {
1449         switch (err) {
1450
1451         case ENOSPC:
1452                 /*
1453                  * For quotas and reservations, ENOSPC indicates
1454                  * something different; setting a quota or reservation
1455                  * doesn't use any disk space.
1456                  */
1457                 switch (prop) {
1458                 case ZFS_PROP_QUOTA:
1459                 case ZFS_PROP_REFQUOTA:
1460                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1461                             "size is less than current used or "
1462                             "reserved space"));
1463                         (void) zfs_error(hdl, EZFS_PROPSPACE, errbuf);
1464                         break;
1465
1466                 case ZFS_PROP_RESERVATION:
1467                 case ZFS_PROP_REFRESERVATION:
1468                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1469                             "size is greater than available space"));
1470                         (void) zfs_error(hdl, EZFS_PROPSPACE, errbuf);
1471                         break;
1472
1473                 default:
1474                         (void) zfs_standard_error(hdl, err, errbuf);
1475                         break;
1476                 }
1477                 break;
1478
1479         case EBUSY:
1480                 (void) zfs_standard_error(hdl, EBUSY, errbuf);
1481                 break;
1482
1483         case EROFS:
1484                 (void) zfs_error(hdl, EZFS_DSREADONLY, errbuf);
1485                 break;
1486
1487         case ENOTSUP:
1488                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1489                     "pool and or dataset must be upgraded to set this "
1490                     "property or value"));
1491                 (void) zfs_error(hdl, EZFS_BADVERSION, errbuf);
1492                 break;
1493
1494         case ERANGE:
1495         case EDOM:
1496                 if (prop == ZFS_PROP_COMPRESSION ||
1497                     prop == ZFS_PROP_RECORDSIZE) {
1498                         (void) zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1499                             "property setting is not allowed on "
1500                             "bootable datasets"));
1501                         (void) zfs_error(hdl, EZFS_NOTSUP, errbuf);
1502                 } else if (prop == ZFS_PROP_CHECKSUM ||
1503                     prop == ZFS_PROP_DEDUP) {
1504                         (void) zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1505                             "property setting is not allowed on "
1506                             "root pools"));
1507                         (void) zfs_error(hdl, EZFS_NOTSUP, errbuf);
1508                 } else {
1509                         (void) zfs_standard_error(hdl, err, errbuf);
1510                 }
1511                 break;
1512
1513         case EINVAL:
1514                 if (prop == ZPROP_INVAL) {
1515                         (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1516                 } else {
1517                         (void) zfs_standard_error(hdl, err, errbuf);
1518                 }
1519                 break;
1520
1521         case EOVERFLOW:
1522                 /*
1523                  * This platform can't address a volume this big.
1524                  */
1525 #ifdef _ILP32
1526                 if (prop == ZFS_PROP_VOLSIZE) {
1527                         (void) zfs_error(hdl, EZFS_VOLTOOBIG, errbuf);
1528                         break;
1529                 }
1530 #endif
1531                 /* FALLTHROUGH */
1532         default:
1533                 (void) zfs_standard_error(hdl, err, errbuf);
1534         }
1535 }
1536
1537 /*
1538  * Given a property name and value, set the property for the given dataset.
1539  */
1540 int
1541 zfs_prop_set(zfs_handle_t *zhp, const char *propname, const char *propval)
1542 {
1543         int ret = -1;
1544         char errbuf[1024];
1545         libzfs_handle_t *hdl = zhp->zfs_hdl;
1546         nvlist_t *nvl = NULL;
1547
1548         (void) snprintf(errbuf, sizeof (errbuf),
1549             dgettext(TEXT_DOMAIN, "cannot set property for '%s'"),
1550             zhp->zfs_name);
1551
1552         if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0) != 0 ||
1553             nvlist_add_string(nvl, propname, propval) != 0) {
1554                 (void) no_memory(hdl);
1555                 goto error;
1556         }
1557
1558         ret = zfs_prop_set_list(zhp, nvl);
1559
1560 error:
1561         nvlist_free(nvl);
1562         return (ret);
1563 }
1564
1565
1566
1567 /*
1568  * Given an nvlist of property names and values, set the properties for the
1569  * given dataset.
1570  */
1571 int
1572 zfs_prop_set_list(zfs_handle_t *zhp, nvlist_t *props)
1573 {
1574         zfs_cmd_t zc = { 0 };
1575         int ret = -1;
1576         prop_changelist_t **cls = NULL;
1577         int cl_idx;
1578         char errbuf[1024];
1579         libzfs_handle_t *hdl = zhp->zfs_hdl;
1580         nvlist_t *nvl;
1581         int nvl_len;
1582         int added_resv;
1583
1584         (void) snprintf(errbuf, sizeof (errbuf),
1585             dgettext(TEXT_DOMAIN, "cannot set property for '%s'"),
1586             zhp->zfs_name);
1587
1588         if ((nvl = zfs_valid_proplist(hdl, zhp->zfs_type, props,
1589             zfs_prop_get_int(zhp, ZFS_PROP_ZONED), zhp, zhp->zpool_hdl,
1590             errbuf)) == NULL)
1591                 goto error;
1592
1593         /*
1594          * We have to check for any extra properties which need to be added
1595          * before computing the length of the nvlist.
1596          */
1597         for (nvpair_t *elem = nvlist_next_nvpair(nvl, NULL);
1598             elem != NULL;
1599             elem = nvlist_next_nvpair(nvl, elem)) {
1600                 if (zfs_name_to_prop(nvpair_name(elem)) == ZFS_PROP_VOLSIZE &&
1601                     (added_resv = zfs_add_synthetic_resv(zhp, nvl)) == -1) {
1602                         goto error;
1603                 }
1604         }
1605         /*
1606          * Check how many properties we're setting and allocate an array to
1607          * store changelist pointers for postfix().
1608          */
1609         nvl_len = 0;
1610         for (nvpair_t *elem = nvlist_next_nvpair(nvl, NULL);
1611             elem != NULL;
1612             elem = nvlist_next_nvpair(nvl, elem))
1613                 nvl_len++;
1614         if ((cls = calloc(nvl_len, sizeof (prop_changelist_t *))) == NULL)
1615                 goto error;
1616
1617         cl_idx = 0;
1618         for (nvpair_t *elem = nvlist_next_nvpair(nvl, NULL);
1619             elem != NULL;
1620             elem = nvlist_next_nvpair(nvl, elem)) {
1621
1622                 zfs_prop_t prop = zfs_name_to_prop(nvpair_name(elem));
1623
1624                 assert(cl_idx < nvl_len);
1625                 /*
1626                  * We don't want to unmount & remount the dataset when changing
1627                  * its canmount property to 'on' or 'noauto'.  We only use
1628                  * the changelist logic to unmount when setting canmount=off.
1629                  */
1630                 if (!(prop == ZFS_PROP_CANMOUNT &&
1631                     fnvpair_value_uint64(elem) != ZFS_CANMOUNT_OFF)) {
1632                         cls[cl_idx] = changelist_gather(zhp, prop, 0, 0);
1633                         if (cls[cl_idx] == NULL)
1634                                 goto error;
1635                 }
1636
1637                 if (prop == ZFS_PROP_MOUNTPOINT &&
1638                     changelist_haszonedchild(cls[cl_idx])) {
1639                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1640                             "child dataset with inherited mountpoint is used "
1641                             "in a non-global zone"));
1642                         ret = zfs_error(hdl, EZFS_ZONED, errbuf);
1643                         goto error;
1644                 }
1645
1646                 /* We don't support those properties on FreeBSD. */
1647                 switch (prop) {
1648                 case ZFS_PROP_DEVICES:
1649                 case ZFS_PROP_ISCSIOPTIONS:
1650                 case ZFS_PROP_XATTR:
1651                 case ZFS_PROP_VSCAN:
1652                 case ZFS_PROP_NBMAND:
1653                 case ZFS_PROP_MLSLABEL:
1654                         (void) snprintf(errbuf, sizeof (errbuf),
1655                             "property '%s' not supported on FreeBSD",
1656                             nvpair_name(elem));
1657                         ret = zfs_error(hdl, EZFS_PERM, errbuf);
1658                         goto error;
1659                 }
1660
1661                 if (cls[cl_idx] != NULL &&
1662                     (ret = changelist_prefix(cls[cl_idx])) != 0)
1663                         goto error;
1664
1665                 cl_idx++;
1666         }
1667         assert(cl_idx == nvl_len);
1668
1669         /*
1670          * Execute the corresponding ioctl() to set this list of properties.
1671          */
1672         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
1673
1674         if ((ret = zcmd_write_src_nvlist(hdl, &zc, nvl)) != 0 ||
1675             (ret = zcmd_alloc_dst_nvlist(hdl, &zc, 0)) != 0)
1676                 goto error;
1677
1678         ret = zfs_ioctl(hdl, ZFS_IOC_SET_PROP, &zc);
1679
1680         if (ret != 0) {
1681                 /* Get the list of unset properties back and report them. */
1682                 nvlist_t *errorprops = NULL;
1683                 if (zcmd_read_dst_nvlist(hdl, &zc, &errorprops) != 0)
1684                         goto error;
1685                 for (nvpair_t *elem = nvlist_next_nvpair(nvl, NULL);
1686                     elem != NULL;
1687                     elem = nvlist_next_nvpair(nvl, elem)) {
1688                         zfs_prop_t prop = zfs_name_to_prop(nvpair_name(elem));
1689                         zfs_setprop_error(hdl, prop, errno, errbuf);
1690                 }
1691                 nvlist_free(errorprops);
1692
1693                 if (added_resv && errno == ENOSPC) {
1694                         /* clean up the volsize property we tried to set */
1695                         uint64_t old_volsize = zfs_prop_get_int(zhp,
1696                             ZFS_PROP_VOLSIZE);
1697                         nvlist_free(nvl);
1698                         nvl = NULL;
1699                         zcmd_free_nvlists(&zc);
1700
1701                         if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0) != 0)
1702                                 goto error;
1703                         if (nvlist_add_uint64(nvl,
1704                             zfs_prop_to_name(ZFS_PROP_VOLSIZE),
1705                             old_volsize) != 0)
1706                                 goto error;
1707                         if (zcmd_write_src_nvlist(hdl, &zc, nvl) != 0)
1708                                 goto error;
1709                         (void) zfs_ioctl(hdl, ZFS_IOC_SET_PROP, &zc);
1710                 }
1711         } else {
1712                 for (cl_idx = 0; cl_idx < nvl_len; cl_idx++) {
1713                         if (cls[cl_idx] != NULL) {
1714                                 int clp_err = changelist_postfix(cls[cl_idx]);
1715                                 if (clp_err != 0)
1716                                         ret = clp_err;
1717                         }
1718                 }
1719
1720                 /*
1721                  * Refresh the statistics so the new property value
1722                  * is reflected.
1723                  */
1724                 if (ret == 0)
1725                         (void) get_stats(zhp);
1726         }
1727
1728 error:
1729         nvlist_free(nvl);
1730         zcmd_free_nvlists(&zc);
1731         if (cls != NULL) {
1732                 for (cl_idx = 0; cl_idx < nvl_len; cl_idx++) {
1733                         if (cls[cl_idx] != NULL)
1734                                 changelist_free(cls[cl_idx]);
1735                 }
1736                 free(cls);
1737         }
1738         return (ret);
1739 }
1740
1741 /*
1742  * Given a property, inherit the value from the parent dataset, or if received
1743  * is TRUE, revert to the received value, if any.
1744  */
1745 int
1746 zfs_prop_inherit(zfs_handle_t *zhp, const char *propname, boolean_t received)
1747 {
1748         zfs_cmd_t zc = { 0 };
1749         int ret;
1750         prop_changelist_t *cl;
1751         libzfs_handle_t *hdl = zhp->zfs_hdl;
1752         char errbuf[1024];
1753         zfs_prop_t prop;
1754
1755         (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
1756             "cannot inherit %s for '%s'"), propname, zhp->zfs_name);
1757
1758         zc.zc_cookie = received;
1759         if ((prop = zfs_name_to_prop(propname)) == ZPROP_INVAL) {
1760                 /*
1761                  * For user properties, the amount of work we have to do is very
1762                  * small, so just do it here.
1763                  */
1764                 if (!zfs_prop_user(propname)) {
1765                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1766                             "invalid property"));
1767                         return (zfs_error(hdl, EZFS_BADPROP, errbuf));
1768                 }
1769
1770                 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
1771                 (void) strlcpy(zc.zc_value, propname, sizeof (zc.zc_value));
1772
1773                 if (zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_INHERIT_PROP, &zc) != 0)
1774                         return (zfs_standard_error(hdl, errno, errbuf));
1775
1776                 return (0);
1777         }
1778
1779         /*
1780          * Verify that this property is inheritable.
1781          */
1782         if (zfs_prop_readonly(prop))
1783                 return (zfs_error(hdl, EZFS_PROPREADONLY, errbuf));
1784
1785         if (!zfs_prop_inheritable(prop) && !received)
1786                 return (zfs_error(hdl, EZFS_PROPNONINHERIT, errbuf));
1787
1788         /*
1789          * Check to see if the value applies to this type
1790          */
1791         if (!zfs_prop_valid_for_type(prop, zhp->zfs_type))
1792                 return (zfs_error(hdl, EZFS_PROPTYPE, errbuf));
1793
1794         /*
1795          * Normalize the name, to get rid of shorthand abbreviations.
1796          */
1797         propname = zfs_prop_to_name(prop);
1798         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
1799         (void) strlcpy(zc.zc_value, propname, sizeof (zc.zc_value));
1800
1801         if (prop == ZFS_PROP_MOUNTPOINT && getzoneid() == GLOBAL_ZONEID &&
1802             zfs_prop_get_int(zhp, ZFS_PROP_ZONED)) {
1803                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1804                     "dataset is used in a non-global zone"));
1805                 return (zfs_error(hdl, EZFS_ZONED, errbuf));
1806         }
1807
1808         /*
1809          * Determine datasets which will be affected by this change, if any.
1810          */
1811         if ((cl = changelist_gather(zhp, prop, 0, 0)) == NULL)
1812                 return (-1);
1813
1814         if (prop == ZFS_PROP_MOUNTPOINT && changelist_haszonedchild(cl)) {
1815                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1816                     "child dataset with inherited mountpoint is used "
1817                     "in a non-global zone"));
1818                 ret = zfs_error(hdl, EZFS_ZONED, errbuf);
1819                 goto error;
1820         }
1821
1822         if ((ret = changelist_prefix(cl)) != 0)
1823                 goto error;
1824
1825         if ((ret = zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_INHERIT_PROP, &zc)) != 0) {
1826                 return (zfs_standard_error(hdl, errno, errbuf));
1827         } else {
1828
1829                 if ((ret = changelist_postfix(cl)) != 0)
1830                         goto error;
1831
1832                 /*
1833                  * Refresh the statistics so the new property is reflected.
1834                  */
1835                 (void) get_stats(zhp);
1836         }
1837
1838 error:
1839         changelist_free(cl);
1840         return (ret);
1841 }
1842
1843 /*
1844  * True DSL properties are stored in an nvlist.  The following two functions
1845  * extract them appropriately.
1846  */
1847 static uint64_t
1848 getprop_uint64(zfs_handle_t *zhp, zfs_prop_t prop, char **source)
1849 {
1850         nvlist_t *nv;
1851         uint64_t value;
1852
1853         *source = NULL;
1854         if (nvlist_lookup_nvlist(zhp->zfs_props,
1855             zfs_prop_to_name(prop), &nv) == 0) {
1856                 verify(nvlist_lookup_uint64(nv, ZPROP_VALUE, &value) == 0);
1857                 (void) nvlist_lookup_string(nv, ZPROP_SOURCE, source);
1858         } else {
1859                 verify(!zhp->zfs_props_table ||
1860                     zhp->zfs_props_table[prop] == B_TRUE);
1861                 value = zfs_prop_default_numeric(prop);
1862                 *source = "";
1863         }
1864
1865         return (value);
1866 }
1867
1868 static const char *
1869 getprop_string(zfs_handle_t *zhp, zfs_prop_t prop, char **source)
1870 {
1871         nvlist_t *nv;
1872         const char *value;
1873
1874         *source = NULL;
1875         if (nvlist_lookup_nvlist(zhp->zfs_props,
1876             zfs_prop_to_name(prop), &nv) == 0) {
1877                 value = fnvlist_lookup_string(nv, ZPROP_VALUE);
1878                 (void) nvlist_lookup_string(nv, ZPROP_SOURCE, source);
1879         } else {
1880                 verify(!zhp->zfs_props_table ||
1881                     zhp->zfs_props_table[prop] == B_TRUE);
1882                 value = zfs_prop_default_string(prop);
1883                 *source = "";
1884         }
1885
1886         return (value);
1887 }
1888
1889 static boolean_t
1890 zfs_is_recvd_props_mode(zfs_handle_t *zhp)
1891 {
1892         return (zhp->zfs_props == zhp->zfs_recvd_props);
1893 }
1894
1895 static void
1896 zfs_set_recvd_props_mode(zfs_handle_t *zhp, uint64_t *cookie)
1897 {
1898         *cookie = (uint64_t)(uintptr_t)zhp->zfs_props;
1899         zhp->zfs_props = zhp->zfs_recvd_props;
1900 }
1901
1902 static void
1903 zfs_unset_recvd_props_mode(zfs_handle_t *zhp, uint64_t *cookie)
1904 {
1905         zhp->zfs_props = (nvlist_t *)(uintptr_t)*cookie;
1906         *cookie = 0;
1907 }
1908
1909 /*
1910  * Internal function for getting a numeric property.  Both zfs_prop_get() and
1911  * zfs_prop_get_int() are built using this interface.
1912  *
1913  * Certain properties can be overridden using 'mount -o'.  In this case, scan
1914  * the contents of the /etc/mnttab entry, searching for the appropriate options.
1915  * If they differ from the on-disk values, report the current values and mark
1916  * the source "temporary".
1917  */
1918 static int
1919 get_numeric_property(zfs_handle_t *zhp, zfs_prop_t prop, zprop_source_t *src,
1920     char **source, uint64_t *val)
1921 {
1922         zfs_cmd_t zc = { 0 };
1923         nvlist_t *zplprops = NULL;
1924         struct mnttab mnt;
1925         char *mntopt_on = NULL;
1926         char *mntopt_off = NULL;
1927         boolean_t received = zfs_is_recvd_props_mode(zhp);
1928
1929         *source = NULL;
1930
1931         switch (prop) {
1932         case ZFS_PROP_ATIME:
1933                 mntopt_on = MNTOPT_ATIME;
1934                 mntopt_off = MNTOPT_NOATIME;
1935                 break;
1936
1937         case ZFS_PROP_DEVICES:
1938                 mntopt_on = MNTOPT_DEVICES;
1939                 mntopt_off = MNTOPT_NODEVICES;
1940                 break;
1941
1942         case ZFS_PROP_EXEC:
1943                 mntopt_on = MNTOPT_EXEC;
1944                 mntopt_off = MNTOPT_NOEXEC;
1945                 break;
1946
1947         case ZFS_PROP_READONLY:
1948                 mntopt_on = MNTOPT_RO;
1949                 mntopt_off = MNTOPT_RW;
1950                 break;
1951
1952         case ZFS_PROP_SETUID:
1953                 mntopt_on = MNTOPT_SETUID;
1954                 mntopt_off = MNTOPT_NOSETUID;
1955                 break;
1956
1957         case ZFS_PROP_XATTR:
1958                 mntopt_on = MNTOPT_XATTR;
1959                 mntopt_off = MNTOPT_NOXATTR;
1960                 break;
1961
1962         case ZFS_PROP_NBMAND:
1963                 mntopt_on = MNTOPT_NBMAND;
1964                 mntopt_off = MNTOPT_NONBMAND;
1965                 break;
1966         }
1967
1968         /*
1969          * Because looking up the mount options is potentially expensive
1970          * (iterating over all of /etc/mnttab), we defer its calculation until
1971          * we're looking up a property which requires its presence.
1972          */
1973         if (!zhp->zfs_mntcheck &&
1974             (mntopt_on != NULL || prop == ZFS_PROP_MOUNTED)) {
1975                 libzfs_handle_t *hdl = zhp->zfs_hdl;
1976                 struct mnttab entry;
1977
1978                 if (libzfs_mnttab_find(hdl, zhp->zfs_name, &entry) == 0) {
1979                         zhp->zfs_mntopts = zfs_strdup(hdl,
1980                             entry.mnt_mntopts);
1981                         if (zhp->zfs_mntopts == NULL)
1982                                 return (-1);
1983                 }
1984
1985                 zhp->zfs_mntcheck = B_TRUE;
1986         }
1987
1988         if (zhp->zfs_mntopts == NULL)
1989                 mnt.mnt_mntopts = "";
1990         else
1991                 mnt.mnt_mntopts = zhp->zfs_mntopts;
1992
1993         switch (prop) {
1994         case ZFS_PROP_ATIME:
1995         case ZFS_PROP_DEVICES:
1996         case ZFS_PROP_EXEC:
1997         case ZFS_PROP_READONLY:
1998         case ZFS_PROP_SETUID:
1999         case ZFS_PROP_XATTR:
2000         case ZFS_PROP_NBMAND:
2001                 *val = getprop_uint64(zhp, prop, source);
2002
2003                 if (received)
2004                         break;
2005
2006                 if (hasmntopt(&mnt, mntopt_on) && !*val) {
2007                         *val = B_TRUE;
2008                         if (src)
2009                                 *src = ZPROP_SRC_TEMPORARY;
2010                 } else if (hasmntopt(&mnt, mntopt_off) && *val) {
2011                         *val = B_FALSE;
2012                         if (src)
2013                                 *src = ZPROP_SRC_TEMPORARY;
2014                 }
2015                 break;
2016
2017         case ZFS_PROP_CANMOUNT:
2018         case ZFS_PROP_VOLSIZE:
2019         case ZFS_PROP_QUOTA:
2020         case ZFS_PROP_REFQUOTA:
2021         case ZFS_PROP_RESERVATION:
2022         case ZFS_PROP_REFRESERVATION:
2023         case ZFS_PROP_FILESYSTEM_LIMIT:
2024         case ZFS_PROP_SNAPSHOT_LIMIT:
2025         case ZFS_PROP_FILESYSTEM_COUNT:
2026         case ZFS_PROP_SNAPSHOT_COUNT:
2027                 *val = getprop_uint64(zhp, prop, source);
2028
2029                 if (*source == NULL) {
2030                         /* not default, must be local */
2031                         *source = zhp->zfs_name;
2032                 }
2033                 break;
2034
2035         case ZFS_PROP_MOUNTED:
2036                 *val = (zhp->zfs_mntopts != NULL);
2037                 break;
2038
2039         case ZFS_PROP_NUMCLONES:
2040                 *val = zhp->zfs_dmustats.dds_num_clones;
2041                 break;
2042
2043         case ZFS_PROP_VERSION:
2044         case ZFS_PROP_NORMALIZE:
2045         case ZFS_PROP_UTF8ONLY:
2046         case ZFS_PROP_CASE:
2047                 if (!zfs_prop_valid_for_type(prop, zhp->zfs_head_type) ||
2048                     zcmd_alloc_dst_nvlist(zhp->zfs_hdl, &zc, 0) != 0)
2049                         return (-1);
2050                 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
2051                 if (zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_OBJSET_ZPLPROPS, &zc)) {
2052                         zcmd_free_nvlists(&zc);
2053                         return (-1);
2054                 }
2055                 if (zcmd_read_dst_nvlist(zhp->zfs_hdl, &zc, &zplprops) != 0 ||
2056                     nvlist_lookup_uint64(zplprops, zfs_prop_to_name(prop),
2057                     val) != 0) {
2058                         zcmd_free_nvlists(&zc);
2059                         return (-1);
2060                 }
2061                 nvlist_free(zplprops);
2062                 zcmd_free_nvlists(&zc);
2063                 break;
2064
2065         case ZFS_PROP_INCONSISTENT:
2066                 *val = zhp->zfs_dmustats.dds_inconsistent;
2067                 break;
2068
2069         default:
2070                 switch (zfs_prop_get_type(prop)) {
2071                 case PROP_TYPE_NUMBER:
2072                 case PROP_TYPE_INDEX:
2073                         *val = getprop_uint64(zhp, prop, source);
2074                         /*
2075                          * If we tried to use a default value for a
2076                          * readonly property, it means that it was not
2077                          * present.
2078                          */
2079                         if (zfs_prop_readonly(prop) &&
2080                             *source != NULL && (*source)[0] == '\0') {
2081                                 *source = NULL;
2082                         }
2083                         break;
2084
2085                 case PROP_TYPE_STRING:
2086                 default:
2087                         zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN,
2088                             "cannot get non-numeric property"));
2089                         return (zfs_error(zhp->zfs_hdl, EZFS_BADPROP,
2090                             dgettext(TEXT_DOMAIN, "internal error")));
2091                 }
2092         }
2093
2094         return (0);
2095 }
2096
2097 /*
2098  * Calculate the source type, given the raw source string.
2099  */
2100 static void
2101 get_source(zfs_handle_t *zhp, zprop_source_t *srctype, char *source,
2102     char *statbuf, size_t statlen)
2103 {
2104         if (statbuf == NULL || *srctype == ZPROP_SRC_TEMPORARY)
2105                 return;
2106
2107         if (source == NULL) {
2108                 *srctype = ZPROP_SRC_NONE;
2109         } else if (source[0] == '\0') {
2110                 *srctype = ZPROP_SRC_DEFAULT;
2111         } else if (strstr(source, ZPROP_SOURCE_VAL_RECVD) != NULL) {
2112                 *srctype = ZPROP_SRC_RECEIVED;
2113         } else {
2114                 if (strcmp(source, zhp->zfs_name) == 0) {
2115                         *srctype = ZPROP_SRC_LOCAL;
2116                 } else {
2117                         (void) strlcpy(statbuf, source, statlen);
2118                         *srctype = ZPROP_SRC_INHERITED;
2119                 }
2120         }
2121
2122 }
2123
2124 int
2125 zfs_prop_get_recvd(zfs_handle_t *zhp, const char *propname, char *propbuf,
2126     size_t proplen, boolean_t literal)
2127 {
2128         zfs_prop_t prop;
2129         int err = 0;
2130
2131         if (zhp->zfs_recvd_props == NULL)
2132                 if (get_recvd_props_ioctl(zhp) != 0)
2133                         return (-1);
2134
2135         prop = zfs_name_to_prop(propname);
2136
2137         if (prop != ZPROP_INVAL) {
2138                 uint64_t cookie;
2139                 if (!nvlist_exists(zhp->zfs_recvd_props, propname))
2140                         return (-1);
2141                 zfs_set_recvd_props_mode(zhp, &cookie);
2142                 err = zfs_prop_get(zhp, prop, propbuf, proplen,
2143                     NULL, NULL, 0, literal);
2144                 zfs_unset_recvd_props_mode(zhp, &cookie);
2145         } else {
2146                 nvlist_t *propval;
2147                 char *recvdval;
2148                 if (nvlist_lookup_nvlist(zhp->zfs_recvd_props,
2149                     propname, &propval) != 0)
2150                         return (-1);
2151                 verify(nvlist_lookup_string(propval, ZPROP_VALUE,
2152                     &recvdval) == 0);
2153                 (void) strlcpy(propbuf, recvdval, proplen);
2154         }
2155
2156         return (err == 0 ? 0 : -1);
2157 }
2158
2159 static int
2160 get_clones_string(zfs_handle_t *zhp, char *propbuf, size_t proplen)
2161 {
2162         nvlist_t *value;
2163         nvpair_t *pair;
2164
2165         value = zfs_get_clones_nvl(zhp);
2166         if (value == NULL)
2167                 return (-1);
2168
2169         propbuf[0] = '\0';
2170         for (pair = nvlist_next_nvpair(value, NULL); pair != NULL;
2171             pair = nvlist_next_nvpair(value, pair)) {
2172                 if (propbuf[0] != '\0')
2173                         (void) strlcat(propbuf, ",", proplen);
2174                 (void) strlcat(propbuf, nvpair_name(pair), proplen);
2175         }
2176
2177         return (0);
2178 }
2179
2180 struct get_clones_arg {
2181         uint64_t numclones;
2182         nvlist_t *value;
2183         const char *origin;
2184         char buf[ZFS_MAXNAMELEN];
2185 };
2186
2187 int
2188 get_clones_cb(zfs_handle_t *zhp, void *arg)
2189 {
2190         struct get_clones_arg *gca = arg;
2191
2192         if (gca->numclones == 0) {
2193                 zfs_close(zhp);
2194                 return (0);
2195         }
2196
2197         if (zfs_prop_get(zhp, ZFS_PROP_ORIGIN, gca->buf, sizeof (gca->buf),
2198             NULL, NULL, 0, B_TRUE) != 0)
2199                 goto out;
2200         if (strcmp(gca->buf, gca->origin) == 0) {
2201                 fnvlist_add_boolean(gca->value, zfs_get_name(zhp));
2202                 gca->numclones--;
2203         }
2204
2205 out:
2206         (void) zfs_iter_children(zhp, get_clones_cb, gca);
2207         zfs_close(zhp);
2208         return (0);
2209 }
2210
2211 nvlist_t *
2212 zfs_get_clones_nvl(zfs_handle_t *zhp)
2213 {
2214         nvlist_t *nv, *value;
2215
2216         if (nvlist_lookup_nvlist(zhp->zfs_props,
2217             zfs_prop_to_name(ZFS_PROP_CLONES), &nv) != 0) {
2218                 struct get_clones_arg gca;
2219
2220                 /*
2221                  * if this is a snapshot, then the kernel wasn't able
2222                  * to get the clones.  Do it by slowly iterating.
2223                  */
2224                 if (zhp->zfs_type != ZFS_TYPE_SNAPSHOT)
2225                         return (NULL);
2226                 if (nvlist_alloc(&nv, NV_UNIQUE_NAME, 0) != 0)
2227                         return (NULL);
2228                 if (nvlist_alloc(&value, NV_UNIQUE_NAME, 0) != 0) {
2229                         nvlist_free(nv);
2230                         return (NULL);
2231                 }
2232
2233                 gca.numclones = zfs_prop_get_int(zhp, ZFS_PROP_NUMCLONES);
2234                 gca.value = value;
2235                 gca.origin = zhp->zfs_name;
2236
2237                 if (gca.numclones != 0) {
2238                         zfs_handle_t *root;
2239                         char pool[ZFS_MAXNAMELEN];
2240                         char *cp = pool;
2241
2242                         /* get the pool name */
2243                         (void) strlcpy(pool, zhp->zfs_name, sizeof (pool));
2244                         (void) strsep(&cp, "/@");
2245                         root = zfs_open(zhp->zfs_hdl, pool,
2246                             ZFS_TYPE_FILESYSTEM);
2247
2248                         (void) get_clones_cb(root, &gca);
2249                 }
2250
2251                 if (gca.numclones != 0 ||
2252                     nvlist_add_nvlist(nv, ZPROP_VALUE, value) != 0 ||
2253                     nvlist_add_nvlist(zhp->zfs_props,
2254                     zfs_prop_to_name(ZFS_PROP_CLONES), nv) != 0) {
2255                         nvlist_free(nv);
2256                         nvlist_free(value);
2257                         return (NULL);
2258                 }
2259                 nvlist_free(nv);
2260                 nvlist_free(value);
2261                 verify(0 == nvlist_lookup_nvlist(zhp->zfs_props,
2262                     zfs_prop_to_name(ZFS_PROP_CLONES), &nv));
2263         }
2264
2265         verify(nvlist_lookup_nvlist(nv, ZPROP_VALUE, &value) == 0);
2266
2267         return (value);
2268 }
2269
2270 /*
2271  * Retrieve a property from the given object.  If 'literal' is specified, then
2272  * numbers are left as exact values.  Otherwise, numbers are converted to a
2273  * human-readable form.
2274  *
2275  * Returns 0 on success, or -1 on error.
2276  */
2277 int
2278 zfs_prop_get(zfs_handle_t *zhp, zfs_prop_t prop, char *propbuf, size_t proplen,
2279     zprop_source_t *src, char *statbuf, size_t statlen, boolean_t literal)
2280 {
2281         char *source = NULL;
2282         uint64_t val;
2283         const char *str;
2284         const char *strval;
2285         boolean_t received = zfs_is_recvd_props_mode(zhp);
2286
2287         /*
2288          * Check to see if this property applies to our object
2289          */
2290         if (!zfs_prop_valid_for_type(prop, zhp->zfs_type))
2291                 return (-1);
2292
2293         if (received && zfs_prop_readonly(prop))
2294                 return (-1);
2295
2296         if (src)
2297                 *src = ZPROP_SRC_NONE;
2298
2299         switch (prop) {
2300         case ZFS_PROP_CREATION:
2301                 /*
2302                  * 'creation' is a time_t stored in the statistics.  We convert
2303                  * this into a string unless 'literal' is specified.
2304                  */
2305                 {
2306                         val = getprop_uint64(zhp, prop, &source);
2307                         time_t time = (time_t)val;
2308                         struct tm t;
2309
2310                         if (literal ||
2311                             localtime_r(&time, &t) == NULL ||
2312                             strftime(propbuf, proplen, "%a %b %e %k:%M %Y",
2313                             &t) == 0)
2314                                 (void) snprintf(propbuf, proplen, "%llu", val);
2315                 }
2316                 break;
2317
2318         case ZFS_PROP_MOUNTPOINT:
2319                 /*
2320                  * Getting the precise mountpoint can be tricky.
2321                  *
2322                  *  - for 'none' or 'legacy', return those values.
2323                  *  - for inherited mountpoints, we want to take everything
2324                  *    after our ancestor and append it to the inherited value.
2325                  *
2326                  * If the pool has an alternate root, we want to prepend that
2327                  * root to any values we return.
2328                  */
2329
2330                 str = getprop_string(zhp, prop, &source);
2331
2332                 if (str[0] == '/') {
2333                         char buf[MAXPATHLEN];
2334                         char *root = buf;
2335                         const char *relpath;
2336
2337                         /*
2338                          * If we inherit the mountpoint, even from a dataset
2339                          * with a received value, the source will be the path of
2340                          * the dataset we inherit from. If source is
2341                          * ZPROP_SOURCE_VAL_RECVD, the received value is not
2342                          * inherited.
2343                          */
2344                         if (strcmp(source, ZPROP_SOURCE_VAL_RECVD) == 0) {
2345                                 relpath = "";
2346                         } else {
2347                                 relpath = zhp->zfs_name + strlen(source);
2348                                 if (relpath[0] == '/')
2349                                         relpath++;
2350                         }
2351
2352                         if ((zpool_get_prop(zhp->zpool_hdl,
2353                             ZPOOL_PROP_ALTROOT, buf, MAXPATHLEN, NULL,
2354                             B_FALSE)) || (strcmp(root, "-") == 0))
2355                                 root[0] = '\0';
2356                         /*
2357                          * Special case an alternate root of '/'. This will
2358                          * avoid having multiple leading slashes in the
2359                          * mountpoint path.
2360                          */
2361                         if (strcmp(root, "/") == 0)
2362                                 root++;
2363
2364                         /*
2365                          * If the mountpoint is '/' then skip over this
2366                          * if we are obtaining either an alternate root or
2367                          * an inherited mountpoint.
2368                          */
2369                         if (str[1] == '\0' && (root[0] != '\0' ||
2370                             relpath[0] != '\0'))
2371                                 str++;
2372
2373                         if (relpath[0] == '\0')
2374                                 (void) snprintf(propbuf, proplen, "%s%s",
2375                                     root, str);
2376                         else
2377                                 (void) snprintf(propbuf, proplen, "%s%s%s%s",
2378                                     root, str, relpath[0] == '@' ? "" : "/",
2379                                     relpath);
2380                 } else {
2381                         /* 'legacy' or 'none' */
2382                         (void) strlcpy(propbuf, str, proplen);
2383                 }
2384
2385                 break;
2386
2387         case ZFS_PROP_ORIGIN:
2388                 str = getprop_string(zhp, prop, &source);
2389                 if (str == NULL)
2390                         return (-1);
2391                 (void) strlcpy(propbuf, str, proplen);
2392                 break;
2393
2394         case ZFS_PROP_CLONES:
2395                 if (get_clones_string(zhp, propbuf, proplen) != 0)
2396                         return (-1);
2397                 break;
2398
2399         case ZFS_PROP_QUOTA:
2400         case ZFS_PROP_REFQUOTA:
2401         case ZFS_PROP_RESERVATION:
2402         case ZFS_PROP_REFRESERVATION:
2403
2404                 if (get_numeric_property(zhp, prop, src, &source, &val) != 0)
2405                         return (-1);
2406
2407                 /*
2408                  * If quota or reservation is 0, we translate this into 'none'
2409                  * (unless literal is set), and indicate that it's the default
2410                  * value.  Otherwise, we print the number nicely and indicate
2411                  * that its set locally.
2412                  */
2413                 if (val == 0) {
2414                         if (literal)
2415                                 (void) strlcpy(propbuf, "0", proplen);
2416                         else
2417                                 (void) strlcpy(propbuf, "none", proplen);
2418                 } else {
2419                         if (literal)
2420                                 (void) snprintf(propbuf, proplen, "%llu",
2421                                     (u_longlong_t)val);
2422                         else
2423                                 zfs_nicenum(val, propbuf, proplen);
2424                 }
2425                 break;
2426
2427         case ZFS_PROP_FILESYSTEM_LIMIT:
2428         case ZFS_PROP_SNAPSHOT_LIMIT:
2429         case ZFS_PROP_FILESYSTEM_COUNT:
2430         case ZFS_PROP_SNAPSHOT_COUNT:
2431
2432                 if (get_numeric_property(zhp, prop, src, &source, &val) != 0)
2433                         return (-1);
2434
2435                 /*
2436                  * If limit is UINT64_MAX, we translate this into 'none' (unless
2437                  * literal is set), and indicate that it's the default value.
2438                  * Otherwise, we print the number nicely and indicate that it's
2439                  * set locally.
2440                  */
2441                 if (literal) {
2442                         (void) snprintf(propbuf, proplen, "%llu",
2443                             (u_longlong_t)val);
2444                 } else if (val == UINT64_MAX) {
2445                         (void) strlcpy(propbuf, "none", proplen);
2446                 } else {
2447                         zfs_nicenum(val, propbuf, proplen);
2448                 }
2449                 break;
2450
2451         case ZFS_PROP_REFRATIO:
2452         case ZFS_PROP_COMPRESSRATIO:
2453                 if (get_numeric_property(zhp, prop, src, &source, &val) != 0)
2454                         return (-1);
2455                 (void) snprintf(propbuf, proplen, "%llu.%02llux",
2456                     (u_longlong_t)(val / 100),
2457                     (u_longlong_t)(val % 100));
2458                 break;
2459
2460         case ZFS_PROP_TYPE:
2461                 switch (zhp->zfs_type) {
2462                 case ZFS_TYPE_FILESYSTEM:
2463                         str = "filesystem";
2464                         break;
2465                 case ZFS_TYPE_VOLUME:
2466                         str = "volume";
2467                         break;
2468                 case ZFS_TYPE_SNAPSHOT:
2469                         str = "snapshot";
2470                         break;
2471                 case ZFS_TYPE_BOOKMARK:
2472                         str = "bookmark";
2473                         break;
2474                 default:
2475                         abort();
2476                 }
2477                 (void) snprintf(propbuf, proplen, "%s", str);
2478                 break;
2479
2480         case ZFS_PROP_MOUNTED:
2481                 /*
2482                  * The 'mounted' property is a pseudo-property that described
2483                  * whether the filesystem is currently mounted.  Even though
2484                  * it's a boolean value, the typical values of "on" and "off"
2485                  * don't make sense, so we translate to "yes" and "no".
2486                  */
2487                 if (get_numeric_property(zhp, ZFS_PROP_MOUNTED,
2488                     src, &source, &val) != 0)
2489                         return (-1);
2490                 if (val)
2491                         (void) strlcpy(propbuf, "yes", proplen);
2492                 else
2493                         (void) strlcpy(propbuf, "no", proplen);
2494                 break;
2495
2496         case ZFS_PROP_NAME:
2497                 /*
2498                  * The 'name' property is a pseudo-property derived from the
2499                  * dataset name.  It is presented as a real property to simplify
2500                  * consumers.
2501                  */
2502                 (void) strlcpy(propbuf, zhp->zfs_name, proplen);
2503                 break;
2504
2505         case ZFS_PROP_MLSLABEL:
2506                 {
2507 #ifdef illumos
2508                         m_label_t *new_sl = NULL;
2509                         char *ascii = NULL;     /* human readable label */
2510
2511                         (void) strlcpy(propbuf,
2512                             getprop_string(zhp, prop, &source), proplen);
2513
2514                         if (literal || (strcasecmp(propbuf,
2515                             ZFS_MLSLABEL_DEFAULT) == 0))
2516                                 break;
2517
2518                         /*
2519                          * Try to translate the internal hex string to
2520                          * human-readable output.  If there are any
2521                          * problems just use the hex string.
2522                          */
2523
2524                         if (str_to_label(propbuf, &new_sl, MAC_LABEL,
2525                             L_NO_CORRECTION, NULL) == -1) {
2526                                 m_label_free(new_sl);
2527                                 break;
2528                         }
2529
2530                         if (label_to_str(new_sl, &ascii, M_LABEL,
2531                             DEF_NAMES) != 0) {
2532                                 if (ascii)
2533                                         free(ascii);
2534                                 m_label_free(new_sl);
2535                                 break;
2536                         }
2537                         m_label_free(new_sl);
2538
2539                         (void) strlcpy(propbuf, ascii, proplen);
2540                         free(ascii);
2541 #else   /* !illumos */
2542                         propbuf[0] = '\0';
2543 #endif  /* illumos */
2544                 }
2545                 break;
2546
2547         case ZFS_PROP_GUID:
2548                 /*
2549                  * GUIDs are stored as numbers, but they are identifiers.
2550                  * We don't want them to be pretty printed, because pretty
2551                  * printing mangles the ID into a truncated and useless value.
2552                  */
2553                 if (get_numeric_property(zhp, prop, src, &source, &val) != 0)
2554                         return (-1);
2555                 (void) snprintf(propbuf, proplen, "%llu", (u_longlong_t)val);
2556                 break;
2557
2558         default:
2559                 switch (zfs_prop_get_type(prop)) {
2560                 case PROP_TYPE_NUMBER:
2561                         if (get_numeric_property(zhp, prop, src,
2562                             &source, &val) != 0)
2563                                 return (-1);
2564                         if (literal)
2565                                 (void) snprintf(propbuf, proplen, "%llu",
2566                                     (u_longlong_t)val);
2567                         else
2568                                 zfs_nicenum(val, propbuf, proplen);
2569                         break;
2570
2571                 case PROP_TYPE_STRING:
2572                         str = getprop_string(zhp, prop, &source);
2573                         if (str == NULL)
2574                                 return (-1);
2575                         (void) strlcpy(propbuf, str, proplen);
2576                         break;
2577
2578                 case PROP_TYPE_INDEX:
2579                         if (get_numeric_property(zhp, prop, src,
2580                             &source, &val) != 0)
2581                                 return (-1);
2582                         if (zfs_prop_index_to_string(prop, val, &strval) != 0)
2583                                 return (-1);
2584                         (void) strlcpy(propbuf, strval, proplen);
2585                         break;
2586
2587                 default:
2588                         abort();
2589                 }
2590         }
2591
2592         get_source(zhp, src, source, statbuf, statlen);
2593
2594         return (0);
2595 }
2596
2597 /*
2598  * Utility function to get the given numeric property.  Does no validation that
2599  * the given property is the appropriate type; should only be used with
2600  * hard-coded property types.
2601  */
2602 uint64_t
2603 zfs_prop_get_int(zfs_handle_t *zhp, zfs_prop_t prop)
2604 {
2605         char *source;
2606         uint64_t val;
2607
2608         (void) get_numeric_property(zhp, prop, NULL, &source, &val);
2609
2610         return (val);
2611 }
2612
2613 int
2614 zfs_prop_set_int(zfs_handle_t *zhp, zfs_prop_t prop, uint64_t val)
2615 {
2616         char buf[64];
2617
2618         (void) snprintf(buf, sizeof (buf), "%llu", (longlong_t)val);
2619         return (zfs_prop_set(zhp, zfs_prop_to_name(prop), buf));
2620 }
2621
2622 /*
2623  * Similar to zfs_prop_get(), but returns the value as an integer.
2624  */
2625 int
2626 zfs_prop_get_numeric(zfs_handle_t *zhp, zfs_prop_t prop, uint64_t *value,
2627     zprop_source_t *src, char *statbuf, size_t statlen)
2628 {
2629         char *source;
2630
2631         /*
2632          * Check to see if this property applies to our object
2633          */
2634         if (!zfs_prop_valid_for_type(prop, zhp->zfs_type)) {
2635                 return (zfs_error_fmt(zhp->zfs_hdl, EZFS_PROPTYPE,
2636                     dgettext(TEXT_DOMAIN, "cannot get property '%s'"),
2637                     zfs_prop_to_name(prop)));
2638         }
2639
2640         if (src)
2641                 *src = ZPROP_SRC_NONE;
2642
2643         if (get_numeric_property(zhp, prop, src, &source, value) != 0)
2644                 return (-1);
2645
2646         get_source(zhp, src, source, statbuf, statlen);
2647
2648         return (0);
2649 }
2650
2651 static int
2652 idmap_id_to_numeric_domain_rid(uid_t id, boolean_t isuser,
2653     char **domainp, idmap_rid_t *ridp)
2654 {
2655 #ifdef illumos
2656         idmap_get_handle_t *get_hdl = NULL;
2657         idmap_stat status;
2658         int err = EINVAL;
2659
2660         if (idmap_get_create(&get_hdl) != IDMAP_SUCCESS)
2661                 goto out;
2662
2663         if (isuser) {
2664                 err = idmap_get_sidbyuid(get_hdl, id,
2665                     IDMAP_REQ_FLG_USE_CACHE, domainp, ridp, &status);
2666         } else {
2667                 err = idmap_get_sidbygid(get_hdl, id,
2668                     IDMAP_REQ_FLG_USE_CACHE, domainp, ridp, &status);
2669         }
2670         if (err == IDMAP_SUCCESS &&
2671             idmap_get_mappings(get_hdl) == IDMAP_SUCCESS &&
2672             status == IDMAP_SUCCESS)
2673                 err = 0;
2674         else
2675                 err = EINVAL;
2676 out:
2677         if (get_hdl)
2678                 idmap_get_destroy(get_hdl);
2679         return (err);
2680 #else   /* !illumos */
2681         assert(!"invalid code path");
2682         return (EINVAL); // silence compiler warning
2683 #endif  /* illumos */
2684 }
2685
2686 /*
2687  * convert the propname into parameters needed by kernel
2688  * Eg: userquota@ahrens -> ZFS_PROP_USERQUOTA, "", 126829
2689  * Eg: userused@matt@domain -> ZFS_PROP_USERUSED, "S-1-123-456", 789
2690  */
2691 static int
2692 userquota_propname_decode(const char *propname, boolean_t zoned,
2693     zfs_userquota_prop_t *typep, char *domain, int domainlen, uint64_t *ridp)
2694 {
2695         zfs_userquota_prop_t type;
2696         char *cp, *end;
2697         char *numericsid = NULL;
2698         boolean_t isuser;
2699
2700         domain[0] = '\0';
2701         *ridp = 0;
2702         /* Figure out the property type ({user|group}{quota|space}) */
2703         for (type = 0; type < ZFS_NUM_USERQUOTA_PROPS; type++) {
2704                 if (strncmp(propname, zfs_userquota_prop_prefixes[type],
2705                     strlen(zfs_userquota_prop_prefixes[type])) == 0)
2706                         break;
2707         }
2708         if (type == ZFS_NUM_USERQUOTA_PROPS)
2709                 return (EINVAL);
2710         *typep = type;
2711
2712         isuser = (type == ZFS_PROP_USERQUOTA ||
2713             type == ZFS_PROP_USERUSED);
2714
2715         cp = strchr(propname, '@') + 1;
2716
2717         if (strchr(cp, '@')) {
2718 #ifdef illumos
2719                 /*
2720                  * It's a SID name (eg "user@domain") that needs to be
2721                  * turned into S-1-domainID-RID.
2722                  */
2723                 int flag = 0;
2724                 idmap_stat stat, map_stat;
2725                 uid_t pid;
2726                 idmap_rid_t rid;
2727                 idmap_get_handle_t *gh = NULL;
2728
2729                 stat = idmap_get_create(&gh);
2730                 if (stat != IDMAP_SUCCESS) {
2731                         idmap_get_destroy(gh);
2732                         return (ENOMEM);
2733                 }
2734                 if (zoned && getzoneid() == GLOBAL_ZONEID)
2735                         return (ENOENT);
2736                 if (isuser) {
2737                         stat = idmap_getuidbywinname(cp, NULL, flag, &pid);
2738                         if (stat < 0)
2739                                 return (ENOENT);
2740                         stat = idmap_get_sidbyuid(gh, pid, flag, &numericsid,
2741                             &rid, &map_stat);
2742                 } else {
2743                         stat = idmap_getgidbywinname(cp, NULL, flag, &pid);
2744                         if (stat < 0)
2745                                 return (ENOENT);
2746                         stat = idmap_get_sidbygid(gh, pid, flag, &numericsid,
2747                             &rid, &map_stat);
2748                 }
2749                 if (stat < 0) {
2750                         idmap_get_destroy(gh);
2751                         return (ENOENT);
2752                 }
2753                 stat = idmap_get_mappings(gh);
2754                 idmap_get_destroy(gh);
2755
2756                 if (stat < 0) {
2757                         return (ENOENT);
2758                 }
2759                 if (numericsid == NULL)
2760                         return (ENOENT);
2761                 cp = numericsid;
2762                 *ridp = rid;
2763                 /* will be further decoded below */
2764 #else   /* !illumos */
2765                 return (ENOENT);
2766 #endif  /* illumos */
2767         }
2768
2769         if (strncmp(cp, "S-1-", 4) == 0) {
2770                 /* It's a numeric SID (eg "S-1-234-567-89") */
2771                 (void) strlcpy(domain, cp, domainlen);
2772                 errno = 0;
2773                 if (*ridp == 0) {
2774                         cp = strrchr(domain, '-');
2775                         *cp = '\0';
2776                         cp++;
2777                         *ridp = strtoull(cp, &end, 10);
2778                 } else {
2779                         end = "";
2780                 }
2781                 if (numericsid) {
2782                         free(numericsid);
2783                         numericsid = NULL;
2784                 }
2785                 if (errno != 0 || *end != '\0')
2786                         return (EINVAL);
2787         } else if (!isdigit(*cp)) {
2788                 /*
2789                  * It's a user/group name (eg "user") that needs to be
2790                  * turned into a uid/gid
2791                  */
2792                 if (zoned && getzoneid() == GLOBAL_ZONEID)
2793                         return (ENOENT);
2794                 if (isuser) {
2795                         struct passwd *pw;
2796                         pw = getpwnam(cp);
2797                         if (pw == NULL)
2798                                 return (ENOENT);
2799                         *ridp = pw->pw_uid;
2800                 } else {
2801                         struct group *gr;
2802                         gr = getgrnam(cp);
2803                         if (gr == NULL)
2804                                 return (ENOENT);
2805                         *ridp = gr->gr_gid;
2806                 }
2807         } else {
2808                 /* It's a user/group ID (eg "12345"). */
2809                 uid_t id = strtoul(cp, &end, 10);
2810                 idmap_rid_t rid;
2811                 char *mapdomain;
2812
2813                 if (*end != '\0')
2814                         return (EINVAL);
2815                 if (id > MAXUID) {
2816                         /* It's an ephemeral ID. */
2817                         if (idmap_id_to_numeric_domain_rid(id, isuser,
2818                             &mapdomain, &rid) != 0)
2819                                 return (ENOENT);
2820                         (void) strlcpy(domain, mapdomain, domainlen);
2821                         *ridp = rid;
2822                 } else {
2823                         *ridp = id;
2824                 }
2825         }
2826
2827         ASSERT3P(numericsid, ==, NULL);
2828         return (0);
2829 }
2830
2831 static int
2832 zfs_prop_get_userquota_common(zfs_handle_t *zhp, const char *propname,
2833     uint64_t *propvalue, zfs_userquota_prop_t *typep)
2834 {
2835         int err;
2836         zfs_cmd_t zc = { 0 };
2837
2838         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
2839
2840         err = userquota_propname_decode(propname,
2841             zfs_prop_get_int(zhp, ZFS_PROP_ZONED),
2842             typep, zc.zc_value, sizeof (zc.zc_value), &zc.zc_guid);
2843         zc.zc_objset_type = *typep;
2844         if (err)
2845                 return (err);
2846
2847         err = ioctl(zhp->zfs_hdl->libzfs_fd, ZFS_IOC_USERSPACE_ONE, &zc);
2848         if (err)
2849                 return (err);
2850
2851         *propvalue = zc.zc_cookie;
2852         return (0);
2853 }
2854
2855 int
2856 zfs_prop_get_userquota_int(zfs_handle_t *zhp, const char *propname,
2857     uint64_t *propvalue)
2858 {
2859         zfs_userquota_prop_t type;
2860
2861         return (zfs_prop_get_userquota_common(zhp, propname, propvalue,
2862             &type));
2863 }
2864
2865 int
2866 zfs_prop_get_userquota(zfs_handle_t *zhp, const char *propname,
2867     char *propbuf, int proplen, boolean_t literal)
2868 {
2869         int err;
2870         uint64_t propvalue;
2871         zfs_userquota_prop_t type;
2872
2873         err = zfs_prop_get_userquota_common(zhp, propname, &propvalue,
2874             &type);
2875
2876         if (err)
2877                 return (err);
2878
2879         if (literal) {
2880                 (void) snprintf(propbuf, proplen, "%llu", propvalue);
2881         } else if (propvalue == 0 &&
2882             (type == ZFS_PROP_USERQUOTA || type == ZFS_PROP_GROUPQUOTA)) {
2883                 (void) strlcpy(propbuf, "none", proplen);
2884         } else {
2885                 zfs_nicenum(propvalue, propbuf, proplen);
2886         }
2887         return (0);
2888 }
2889
2890 int
2891 zfs_prop_get_written_int(zfs_handle_t *zhp, const char *propname,
2892     uint64_t *propvalue)
2893 {
2894         int err;
2895         zfs_cmd_t zc = { 0 };
2896         const char *snapname;
2897
2898         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
2899
2900         snapname = strchr(propname, '@') + 1;
2901         if (strchr(snapname, '@')) {
2902                 (void) strlcpy(zc.zc_value, snapname, sizeof (zc.zc_value));
2903         } else {
2904                 /* snapname is the short name, append it to zhp's fsname */
2905                 char *cp;
2906
2907                 (void) strlcpy(zc.zc_value, zhp->zfs_name,
2908                     sizeof (zc.zc_value));
2909                 cp = strchr(zc.zc_value, '@');
2910                 if (cp != NULL)
2911                         *cp = '\0';
2912                 (void) strlcat(zc.zc_value, "@", sizeof (zc.zc_value));
2913                 (void) strlcat(zc.zc_value, snapname, sizeof (zc.zc_value));
2914         }
2915
2916         err = ioctl(zhp->zfs_hdl->libzfs_fd, ZFS_IOC_SPACE_WRITTEN, &zc);
2917         if (err)
2918                 return (err);
2919
2920         *propvalue = zc.zc_cookie;
2921         return (0);
2922 }
2923
2924 int
2925 zfs_prop_get_written(zfs_handle_t *zhp, const char *propname,
2926     char *propbuf, int proplen, boolean_t literal)
2927 {
2928         int err;
2929         uint64_t propvalue;
2930
2931         err = zfs_prop_get_written_int(zhp, propname, &propvalue);
2932
2933         if (err)
2934                 return (err);
2935
2936         if (literal) {
2937                 (void) snprintf(propbuf, proplen, "%llu", propvalue);
2938         } else {
2939                 zfs_nicenum(propvalue, propbuf, proplen);
2940         }
2941         return (0);
2942 }
2943
2944 /*
2945  * Returns the name of the given zfs handle.
2946  */
2947 const char *
2948 zfs_get_name(const zfs_handle_t *zhp)
2949 {
2950         return (zhp->zfs_name);
2951 }
2952
2953 /*
2954  * Returns the type of the given zfs handle.
2955  */
2956 zfs_type_t
2957 zfs_get_type(const zfs_handle_t *zhp)
2958 {
2959         return (zhp->zfs_type);
2960 }
2961
2962 /*
2963  * Is one dataset name a child dataset of another?
2964  *
2965  * Needs to handle these cases:
2966  * Dataset 1    "a/foo"         "a/foo"         "a/foo"         "a/foo"
2967  * Dataset 2    "a/fo"          "a/foobar"      "a/bar/baz"     "a/foo/bar"
2968  * Descendant?  No.             No.             No.             Yes.
2969  */
2970 static boolean_t
2971 is_descendant(const char *ds1, const char *ds2)
2972 {
2973         size_t d1len = strlen(ds1);
2974
2975         /* ds2 can't be a descendant if it's smaller */
2976         if (strlen(ds2) < d1len)
2977                 return (B_FALSE);
2978
2979         /* otherwise, compare strings and verify that there's a '/' char */
2980         return (ds2[d1len] == '/' && (strncmp(ds1, ds2, d1len) == 0));
2981 }
2982
2983 /*
2984  * Given a complete name, return just the portion that refers to the parent.
2985  * Will return -1 if there is no parent (path is just the name of the
2986  * pool).
2987  */
2988 static int
2989 parent_name(const char *path, char *buf, size_t buflen)
2990 {
2991         char *slashp;
2992
2993         (void) strlcpy(buf, path, buflen);
2994
2995         if ((slashp = strrchr(buf, '/')) == NULL)
2996                 return (-1);
2997         *slashp = '\0';
2998
2999         return (0);
3000 }
3001
3002 /*
3003  * If accept_ancestor is false, then check to make sure that the given path has
3004  * a parent, and that it exists.  If accept_ancestor is true, then find the
3005  * closest existing ancestor for the given path.  In prefixlen return the
3006  * length of already existing prefix of the given path.  We also fetch the
3007  * 'zoned' property, which is used to validate property settings when creating
3008  * new datasets.
3009  */
3010 static int
3011 check_parents(libzfs_handle_t *hdl, const char *path, uint64_t *zoned,
3012     boolean_t accept_ancestor, int *prefixlen)
3013 {
3014         zfs_cmd_t zc = { 0 };
3015         char parent[ZFS_MAXNAMELEN];
3016         char *slash;
3017         zfs_handle_t *zhp;
3018         char errbuf[1024];
3019         uint64_t is_zoned;
3020
3021         (void) snprintf(errbuf, sizeof (errbuf),
3022             dgettext(TEXT_DOMAIN, "cannot create '%s'"), path);
3023
3024         /* get parent, and check to see if this is just a pool */
3025         if (parent_name(path, parent, sizeof (parent)) != 0) {
3026                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3027                     "missing dataset name"));
3028                 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3029         }
3030
3031         /* check to see if the pool exists */
3032         if ((slash = strchr(parent, '/')) == NULL)
3033                 slash = parent + strlen(parent);
3034         (void) strncpy(zc.zc_name, parent, slash - parent);
3035         zc.zc_name[slash - parent] = '\0';
3036         if (ioctl(hdl->libzfs_fd, ZFS_IOC_OBJSET_STATS, &zc) != 0 &&
3037             errno == ENOENT) {
3038                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3039                     "no such pool '%s'"), zc.zc_name);
3040                 return (zfs_error(hdl, EZFS_NOENT, errbuf));
3041         }
3042
3043         /* check to see if the parent dataset exists */
3044         while ((zhp = make_dataset_handle(hdl, parent)) == NULL) {
3045                 if (errno == ENOENT && accept_ancestor) {
3046                         /*
3047                          * Go deeper to find an ancestor, give up on top level.
3048                          */
3049                         if (parent_name(parent, parent, sizeof (parent)) != 0) {
3050                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3051                                     "no such pool '%s'"), zc.zc_name);
3052                                 return (zfs_error(hdl, EZFS_NOENT, errbuf));
3053                         }
3054                 } else if (errno == ENOENT) {
3055                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3056                             "parent does not exist"));
3057                         return (zfs_error(hdl, EZFS_NOENT, errbuf));
3058                 } else
3059                         return (zfs_standard_error(hdl, errno, errbuf));
3060         }
3061
3062         is_zoned = zfs_prop_get_int(zhp, ZFS_PROP_ZONED);
3063         if (zoned != NULL)
3064                 *zoned = is_zoned;
3065
3066         /* we are in a non-global zone, but parent is in the global zone */
3067         if (getzoneid() != GLOBAL_ZONEID && !is_zoned) {
3068                 (void) zfs_standard_error(hdl, EPERM, errbuf);
3069                 zfs_close(zhp);
3070                 return (-1);
3071         }
3072
3073         /* make sure parent is a filesystem */
3074         if (zfs_get_type(zhp) != ZFS_TYPE_FILESYSTEM) {
3075                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3076                     "parent is not a filesystem"));
3077                 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf);
3078                 zfs_close(zhp);
3079                 return (-1);
3080         }
3081
3082         zfs_close(zhp);
3083         if (prefixlen != NULL)
3084                 *prefixlen = strlen(parent);
3085         return (0);
3086 }
3087
3088 /*
3089  * Finds whether the dataset of the given type(s) exists.
3090  */
3091 boolean_t
3092 zfs_dataset_exists(libzfs_handle_t *hdl, const char *path, zfs_type_t types)
3093 {
3094         zfs_handle_t *zhp;
3095
3096         if (!zfs_validate_name(hdl, path, types, B_FALSE))
3097                 return (B_FALSE);
3098
3099         /*
3100          * Try to get stats for the dataset, which will tell us if it exists.
3101          */
3102         if ((zhp = make_dataset_handle(hdl, path)) != NULL) {
3103                 int ds_type = zhp->zfs_type;
3104
3105                 zfs_close(zhp);
3106                 if (types & ds_type)
3107                         return (B_TRUE);
3108         }
3109         return (B_FALSE);
3110 }
3111
3112 /*
3113  * Given a path to 'target', create all the ancestors between
3114  * the prefixlen portion of the path, and the target itself.
3115  * Fail if the initial prefixlen-ancestor does not already exist.
3116  */
3117 int
3118 create_parents(libzfs_handle_t *hdl, char *target, int prefixlen)
3119 {
3120         zfs_handle_t *h;
3121         char *cp;
3122         const char *opname;
3123
3124         /* make sure prefix exists */
3125         cp = target + prefixlen;
3126         if (*cp != '/') {
3127                 assert(strchr(cp, '/') == NULL);
3128                 h = zfs_open(hdl, target, ZFS_TYPE_FILESYSTEM);
3129         } else {
3130                 *cp = '\0';
3131                 h = zfs_open(hdl, target, ZFS_TYPE_FILESYSTEM);
3132                 *cp = '/';
3133         }
3134         if (h == NULL)
3135                 return (-1);
3136         zfs_close(h);
3137
3138         /*
3139          * Attempt to create, mount, and share any ancestor filesystems,
3140          * up to the prefixlen-long one.
3141          */
3142         for (cp = target + prefixlen + 1;
3143             cp = strchr(cp, '/'); *cp = '/', cp++) {
3144
3145                 *cp = '\0';
3146
3147                 h = make_dataset_handle(hdl, target);
3148                 if (h) {
3149                         /* it already exists, nothing to do here */
3150                         zfs_close(h);
3151                         continue;
3152                 }
3153
3154                 if (zfs_create(hdl, target, ZFS_TYPE_FILESYSTEM,
3155                     NULL) != 0) {
3156                         opname = dgettext(TEXT_DOMAIN, "create");
3157                         goto ancestorerr;
3158                 }
3159
3160                 h = zfs_open(hdl, target, ZFS_TYPE_FILESYSTEM);
3161                 if (h == NULL) {
3162                         opname = dgettext(TEXT_DOMAIN, "open");
3163                         goto ancestorerr;
3164                 }
3165
3166                 if (zfs_mount(h, NULL, 0) != 0) {
3167                         opname = dgettext(TEXT_DOMAIN, "mount");
3168                         goto ancestorerr;
3169                 }
3170
3171                 if (zfs_share(h) != 0) {
3172                         opname = dgettext(TEXT_DOMAIN, "share");
3173                         goto ancestorerr;
3174                 }
3175
3176                 zfs_close(h);
3177         }
3178
3179         return (0);
3180
3181 ancestorerr:
3182         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3183             "failed to %s ancestor '%s'"), opname, target);
3184         return (-1);
3185 }
3186
3187 /*
3188  * Creates non-existing ancestors of the given path.
3189  */
3190 int
3191 zfs_create_ancestors(libzfs_handle_t *hdl, const char *path)
3192 {
3193         int prefix;
3194         char *path_copy;
3195         int rc;
3196
3197         if (check_parents(hdl, path, NULL, B_TRUE, &prefix) != 0)
3198                 return (-1);
3199
3200         if ((path_copy = strdup(path)) != NULL) {
3201                 rc = create_parents(hdl, path_copy, prefix);
3202                 free(path_copy);
3203         }
3204         if (path_copy == NULL || rc != 0)
3205                 return (-1);
3206
3207         return (0);
3208 }
3209
3210 /*
3211  * Create a new filesystem or volume.
3212  */
3213 int
3214 zfs_create(libzfs_handle_t *hdl, const char *path, zfs_type_t type,
3215     nvlist_t *props)
3216 {
3217         int ret;
3218         uint64_t size = 0;
3219         uint64_t blocksize = zfs_prop_default_numeric(ZFS_PROP_VOLBLOCKSIZE);
3220         char errbuf[1024];
3221         uint64_t zoned;
3222         dmu_objset_type_t ost;
3223
3224         (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3225             "cannot create '%s'"), path);
3226
3227         /* validate the path, taking care to note the extended error message */
3228         if (!zfs_validate_name(hdl, path, type, B_TRUE))
3229                 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3230
3231         /* validate parents exist */
3232         if (check_parents(hdl, path, &zoned, B_FALSE, NULL) != 0)
3233                 return (-1);
3234
3235         /*
3236          * The failure modes when creating a dataset of a different type over
3237          * one that already exists is a little strange.  In particular, if you
3238          * try to create a dataset on top of an existing dataset, the ioctl()
3239          * will return ENOENT, not EEXIST.  To prevent this from happening, we
3240          * first try to see if the dataset exists.
3241          */
3242         if (zfs_dataset_exists(hdl, path, ZFS_TYPE_DATASET)) {
3243                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3244                     "dataset already exists"));
3245                 return (zfs_error(hdl, EZFS_EXISTS, errbuf));
3246         }
3247
3248         if (type == ZFS_TYPE_VOLUME)
3249                 ost = DMU_OST_ZVOL;
3250         else
3251                 ost = DMU_OST_ZFS;
3252
3253         /* open zpool handle for prop validation */
3254         char pool_path[MAXNAMELEN];
3255         (void) strlcpy(pool_path, path, sizeof (pool_path));
3256
3257         /* truncate pool_path at first slash */
3258         char *p = strchr(pool_path, '/');
3259         if (p != NULL)
3260                 *p = '\0';
3261
3262         zpool_handle_t *zpool_handle = zpool_open(hdl, pool_path);
3263
3264         if (props && (props = zfs_valid_proplist(hdl, type, props,
3265             zoned, NULL, zpool_handle, errbuf)) == 0) {
3266                 zpool_close(zpool_handle);
3267                 return (-1);
3268         }
3269         zpool_close(zpool_handle);
3270
3271         if (type == ZFS_TYPE_VOLUME) {
3272                 /*
3273                  * If we are creating a volume, the size and block size must
3274                  * satisfy a few restraints.  First, the blocksize must be a
3275                  * valid block size between SPA_{MIN,MAX}BLOCKSIZE.  Second, the
3276                  * volsize must be a multiple of the block size, and cannot be
3277                  * zero.
3278                  */
3279                 if (props == NULL || nvlist_lookup_uint64(props,
3280                     zfs_prop_to_name(ZFS_PROP_VOLSIZE), &size) != 0) {
3281                         nvlist_free(props);
3282                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3283                             "missing volume size"));
3284                         return (zfs_error(hdl, EZFS_BADPROP, errbuf));
3285                 }
3286
3287                 if ((ret = nvlist_lookup_uint64(props,
3288                     zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE),
3289                     &blocksize)) != 0) {
3290                         if (ret == ENOENT) {
3291                                 blocksize = zfs_prop_default_numeric(
3292                                     ZFS_PROP_VOLBLOCKSIZE);
3293                         } else {
3294                                 nvlist_free(props);
3295                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3296                                     "missing volume block size"));
3297                                 return (zfs_error(hdl, EZFS_BADPROP, errbuf));
3298                         }
3299                 }
3300
3301                 if (size == 0) {
3302                         nvlist_free(props);
3303                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3304                             "volume size cannot be zero"));
3305                         return (zfs_error(hdl, EZFS_BADPROP, errbuf));
3306                 }
3307
3308                 if (size % blocksize != 0) {
3309                         nvlist_free(props);
3310                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3311                             "volume size must be a multiple of volume block "
3312                             "size"));
3313                         return (zfs_error(hdl, EZFS_BADPROP, errbuf));
3314                 }
3315         }
3316
3317         /* create the dataset */
3318         ret = lzc_create(path, ost, props);
3319         nvlist_free(props);
3320
3321         /* check for failure */
3322         if (ret != 0) {
3323                 char parent[ZFS_MAXNAMELEN];
3324                 (void) parent_name(path, parent, sizeof (parent));
3325
3326                 switch (errno) {
3327                 case ENOENT:
3328                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3329                             "no such parent '%s'"), parent);
3330                         return (zfs_error(hdl, EZFS_NOENT, errbuf));
3331
3332                 case EINVAL:
3333                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3334                             "parent '%s' is not a filesystem"), parent);
3335                         return (zfs_error(hdl, EZFS_BADTYPE, errbuf));
3336
3337                 case ENOTSUP:
3338                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3339                             "pool must be upgraded to set this "
3340                             "property or value"));
3341                         return (zfs_error(hdl, EZFS_BADVERSION, errbuf));
3342 #ifdef _ILP32
3343                 case EOVERFLOW:
3344                         /*
3345                          * This platform can't address a volume this big.
3346                          */
3347                         if (type == ZFS_TYPE_VOLUME)
3348                                 return (zfs_error(hdl, EZFS_VOLTOOBIG,
3349                                     errbuf));
3350 #endif
3351                         /* FALLTHROUGH */
3352                 default:
3353                         return (zfs_standard_error(hdl, errno, errbuf));
3354                 }
3355         }
3356
3357         return (0);
3358 }
3359
3360 /*
3361  * Destroys the given dataset.  The caller must make sure that the filesystem
3362  * isn't mounted, and that there are no active dependents. If the file system
3363  * does not exist this function does nothing.
3364  */
3365 int
3366 zfs_destroy(zfs_handle_t *zhp, boolean_t defer)
3367 {
3368         zfs_cmd_t zc = { 0 };
3369
3370         if (zhp->zfs_type == ZFS_TYPE_BOOKMARK) {
3371                 nvlist_t *nv = fnvlist_alloc();
3372                 fnvlist_add_boolean(nv, zhp->zfs_name);
3373                 int error = lzc_destroy_bookmarks(nv, NULL);
3374                 fnvlist_free(nv);
3375                 if (error != 0) {
3376                         return (zfs_standard_error_fmt(zhp->zfs_hdl, errno,
3377                             dgettext(TEXT_DOMAIN, "cannot destroy '%s'"),
3378                             zhp->zfs_name));
3379                 }
3380                 return (0);
3381         }
3382
3383         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
3384
3385         if (ZFS_IS_VOLUME(zhp)) {
3386                 zc.zc_objset_type = DMU_OST_ZVOL;
3387         } else {
3388                 zc.zc_objset_type = DMU_OST_ZFS;
3389         }
3390
3391         zc.zc_defer_destroy = defer;
3392         if (zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_DESTROY, &zc) != 0 &&
3393             errno != ENOENT) {
3394                 return (zfs_standard_error_fmt(zhp->zfs_hdl, errno,
3395                     dgettext(TEXT_DOMAIN, "cannot destroy '%s'"),
3396                     zhp->zfs_name));
3397         }
3398
3399         remove_mountpoint(zhp);
3400
3401         return (0);
3402 }
3403
3404 struct destroydata {
3405         nvlist_t *nvl;
3406         const char *snapname;
3407 };
3408
3409 static int
3410 zfs_check_snap_cb(zfs_handle_t *zhp, void *arg)
3411 {
3412         struct destroydata *dd = arg;
3413         char name[ZFS_MAXNAMELEN];
3414         int rv = 0;
3415
3416         (void) snprintf(name, sizeof (name),
3417             "%s@%s", zhp->zfs_name, dd->snapname);
3418
3419         if (lzc_exists(name))
3420                 verify(nvlist_add_boolean(dd->nvl, name) == 0);
3421
3422         rv = zfs_iter_filesystems(zhp, zfs_check_snap_cb, dd);
3423         zfs_close(zhp);
3424         return (rv);
3425 }
3426
3427 /*
3428  * Destroys all snapshots with the given name in zhp & descendants.
3429  */
3430 int
3431 zfs_destroy_snaps(zfs_handle_t *zhp, char *snapname, boolean_t defer)
3432 {
3433         int ret;
3434         struct destroydata dd = { 0 };
3435
3436         dd.snapname = snapname;
3437         verify(nvlist_alloc(&dd.nvl, NV_UNIQUE_NAME, 0) == 0);
3438         (void) zfs_check_snap_cb(zfs_handle_dup(zhp), &dd);
3439
3440         if (nvlist_empty(dd.nvl)) {
3441                 ret = zfs_standard_error_fmt(zhp->zfs_hdl, ENOENT,
3442                     dgettext(TEXT_DOMAIN, "cannot destroy '%s@%s'"),
3443                     zhp->zfs_name, snapname);
3444         } else {
3445                 ret = zfs_destroy_snaps_nvl(zhp->zfs_hdl, dd.nvl, defer);
3446         }
3447         nvlist_free(dd.nvl);
3448         return (ret);
3449 }
3450
3451 /*
3452  * Destroys all the snapshots named in the nvlist.
3453  */
3454 int
3455 zfs_destroy_snaps_nvl(libzfs_handle_t *hdl, nvlist_t *snaps, boolean_t defer)
3456 {
3457         int ret;
3458         nvlist_t *errlist;
3459
3460         ret = lzc_destroy_snaps(snaps, defer, &errlist);
3461
3462         if (ret == 0)
3463                 return (0);
3464
3465         if (nvlist_empty(errlist)) {
3466                 char errbuf[1024];
3467                 (void) snprintf(errbuf, sizeof (errbuf),
3468                     dgettext(TEXT_DOMAIN, "cannot destroy snapshots"));
3469
3470                 ret = zfs_standard_error(hdl, ret, errbuf);
3471         }
3472         for (nvpair_t *pair = nvlist_next_nvpair(errlist, NULL);
3473             pair != NULL; pair = nvlist_next_nvpair(errlist, pair)) {
3474                 char errbuf[1024];
3475                 (void) snprintf(errbuf, sizeof (errbuf),
3476                     dgettext(TEXT_DOMAIN, "cannot destroy snapshot %s"),
3477                     nvpair_name(pair));
3478
3479                 switch (fnvpair_value_int32(pair)) {
3480                 case EEXIST:
3481                         zfs_error_aux(hdl,
3482                             dgettext(TEXT_DOMAIN, "snapshot is cloned"));
3483                         ret = zfs_error(hdl, EZFS_EXISTS, errbuf);
3484                         break;
3485                 default:
3486                         ret = zfs_standard_error(hdl, errno, errbuf);
3487                         break;
3488                 }
3489         }
3490
3491         return (ret);
3492 }
3493
3494 /*
3495  * Clones the given dataset.  The target must be of the same type as the source.
3496  */
3497 int
3498 zfs_clone(zfs_handle_t *zhp, const char *target, nvlist_t *props)
3499 {
3500         char parent[ZFS_MAXNAMELEN];
3501         int ret;
3502         char errbuf[1024];
3503         libzfs_handle_t *hdl = zhp->zfs_hdl;
3504         uint64_t zoned;
3505
3506         assert(zhp->zfs_type == ZFS_TYPE_SNAPSHOT);
3507
3508         (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3509             "cannot create '%s'"), target);
3510
3511         /* validate the target/clone name */
3512         if (!zfs_validate_name(hdl, target, ZFS_TYPE_FILESYSTEM, B_TRUE))
3513                 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3514
3515         /* validate parents exist */
3516         if (check_parents(hdl, target, &zoned, B_FALSE, NULL) != 0)
3517                 return (-1);
3518
3519         (void) parent_name(target, parent, sizeof (parent));
3520
3521         /* do the clone */
3522
3523         if (props) {
3524                 zfs_type_t type;
3525                 if (ZFS_IS_VOLUME(zhp)) {
3526                         type = ZFS_TYPE_VOLUME;
3527                 } else {
3528                         type = ZFS_TYPE_FILESYSTEM;
3529                 }
3530                 if ((props = zfs_valid_proplist(hdl, type, props, zoned,
3531                     zhp, zhp->zpool_hdl, errbuf)) == NULL)
3532                         return (-1);
3533         }
3534
3535         ret = lzc_clone(target, zhp->zfs_name, props);
3536         nvlist_free(props);
3537
3538         if (ret != 0) {
3539                 switch (errno) {
3540
3541                 case ENOENT:
3542                         /*
3543                          * The parent doesn't exist.  We should have caught this
3544                          * above, but there may a race condition that has since
3545                          * destroyed the parent.
3546                          *
3547                          * At this point, we don't know whether it's the source
3548                          * that doesn't exist anymore, or whether the target
3549                          * dataset doesn't exist.
3550                          */
3551                         zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN,
3552                             "no such parent '%s'"), parent);
3553                         return (zfs_error(zhp->zfs_hdl, EZFS_NOENT, errbuf));
3554
3555                 case EXDEV:
3556                         zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN,
3557                             "source and target pools differ"));
3558                         return (zfs_error(zhp->zfs_hdl, EZFS_CROSSTARGET,
3559                             errbuf));
3560
3561                 default:
3562                         return (zfs_standard_error(zhp->zfs_hdl, errno,
3563                             errbuf));
3564                 }
3565         }
3566
3567         return (ret);
3568 }
3569
3570 /*
3571  * Promotes the given clone fs to be the clone parent.
3572  */
3573 int
3574 zfs_promote(zfs_handle_t *zhp)
3575 {
3576         libzfs_handle_t *hdl = zhp->zfs_hdl;
3577         zfs_cmd_t zc = { 0 };
3578         char parent[MAXPATHLEN];
3579         int ret;
3580         char errbuf[1024];
3581
3582         (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3583             "cannot promote '%s'"), zhp->zfs_name);
3584
3585         if (zhp->zfs_type == ZFS_TYPE_SNAPSHOT) {
3586                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3587                     "snapshots can not be promoted"));
3588                 return (zfs_error(hdl, EZFS_BADTYPE, errbuf));
3589         }
3590
3591         (void) strlcpy(parent, zhp->zfs_dmustats.dds_origin, sizeof (parent));
3592         if (parent[0] == '\0') {
3593                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3594                     "not a cloned filesystem"));
3595                 return (zfs_error(hdl, EZFS_BADTYPE, errbuf));
3596         }
3597
3598         (void) strlcpy(zc.zc_value, zhp->zfs_dmustats.dds_origin,
3599             sizeof (zc.zc_value));
3600         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
3601         ret = zfs_ioctl(hdl, ZFS_IOC_PROMOTE, &zc);
3602
3603         if (ret != 0) {
3604                 int save_errno = errno;
3605
3606                 switch (save_errno) {
3607                 case EEXIST:
3608                         /* There is a conflicting snapshot name. */
3609                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3610                             "conflicting snapshot '%s' from parent '%s'"),
3611                             zc.zc_string, parent);
3612                         return (zfs_error(hdl, EZFS_EXISTS, errbuf));
3613
3614                 default:
3615                         return (zfs_standard_error(hdl, save_errno, errbuf));
3616                 }
3617         }
3618         return (ret);
3619 }
3620
3621 typedef struct snapdata {
3622         nvlist_t *sd_nvl;
3623         const char *sd_snapname;
3624 } snapdata_t;
3625
3626 static int
3627 zfs_snapshot_cb(zfs_handle_t *zhp, void *arg)
3628 {
3629         snapdata_t *sd = arg;
3630         char name[ZFS_MAXNAMELEN];
3631         int rv = 0;
3632
3633         if (zfs_prop_get_int(zhp, ZFS_PROP_INCONSISTENT) == 0) {
3634                 (void) snprintf(name, sizeof (name),
3635                     "%s@%s", zfs_get_name(zhp), sd->sd_snapname);
3636
3637                 fnvlist_add_boolean(sd->sd_nvl, name);
3638
3639                 rv = zfs_iter_filesystems(zhp, zfs_snapshot_cb, sd);
3640         }
3641         zfs_close(zhp);
3642
3643         return (rv);
3644 }
3645
3646 /*
3647  * Creates snapshots.  The keys in the snaps nvlist are the snapshots to be
3648  * created.
3649  */
3650 int
3651 zfs_snapshot_nvl(libzfs_handle_t *hdl, nvlist_t *snaps, nvlist_t *props)
3652 {
3653         int ret;
3654         char errbuf[1024];
3655         nvpair_t *elem;
3656         nvlist_t *errors;
3657
3658         (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3659             "cannot create snapshots "));
3660
3661         elem = NULL;
3662         while ((elem = nvlist_next_nvpair(snaps, elem)) != NULL) {
3663                 const char *snapname = nvpair_name(elem);
3664
3665                 /* validate the target name */
3666                 if (!zfs_validate_name(hdl, snapname, ZFS_TYPE_SNAPSHOT,
3667                     B_TRUE)) {
3668                         (void) snprintf(errbuf, sizeof (errbuf),
3669                             dgettext(TEXT_DOMAIN,
3670                             "cannot create snapshot '%s'"), snapname);
3671                         return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3672                 }
3673         }
3674
3675         /*
3676          * get pool handle for prop validation. assumes all snaps are in the
3677          * same pool, as does lzc_snapshot (below).
3678          */
3679         char pool[MAXNAMELEN];
3680         elem = nvlist_next_nvpair(snaps, NULL);
3681         (void) strlcpy(pool, nvpair_name(elem), sizeof (pool));
3682         pool[strcspn(pool, "/@")] = '\0';
3683         zpool_handle_t *zpool_hdl = zpool_open(hdl, pool);
3684
3685         if (props != NULL &&
3686             (props = zfs_valid_proplist(hdl, ZFS_TYPE_SNAPSHOT,
3687             props, B_FALSE, NULL, zpool_hdl, errbuf)) == NULL) {
3688                 zpool_close(zpool_hdl);
3689                 return (-1);
3690         }
3691         zpool_close(zpool_hdl);
3692
3693         ret = lzc_snapshot(snaps, props, &errors);
3694
3695         if (ret != 0) {
3696                 boolean_t printed = B_FALSE;
3697                 for (elem = nvlist_next_nvpair(errors, NULL);
3698                     elem != NULL;
3699                     elem = nvlist_next_nvpair(errors, elem)) {
3700                         (void) snprintf(errbuf, sizeof (errbuf),
3701                             dgettext(TEXT_DOMAIN,
3702                             "cannot create snapshot '%s'"), nvpair_name(elem));
3703                         (void) zfs_standard_error(hdl,
3704                             fnvpair_value_int32(elem), errbuf);
3705                         printed = B_TRUE;
3706                 }
3707                 if (!printed) {
3708                         switch (ret) {
3709                         case EXDEV:
3710                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3711                                     "multiple snapshots of same "
3712                                     "fs not allowed"));
3713                                 (void) zfs_error(hdl, EZFS_EXISTS, errbuf);
3714
3715                                 break;
3716                         default:
3717                                 (void) zfs_standard_error(hdl, ret, errbuf);
3718                         }
3719                 }
3720         }
3721
3722         nvlist_free(props);
3723         nvlist_free(errors);
3724         return (ret);
3725 }
3726
3727 int
3728 zfs_snapshot(libzfs_handle_t *hdl, const char *path, boolean_t recursive,
3729     nvlist_t *props)
3730 {
3731         int ret;
3732         snapdata_t sd = { 0 };
3733         char fsname[ZFS_MAXNAMELEN];
3734         char *cp;
3735         zfs_handle_t *zhp;
3736         char errbuf[1024];
3737
3738         (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3739             "cannot snapshot %s"), path);
3740
3741         if (!zfs_validate_name(hdl, path, ZFS_TYPE_SNAPSHOT, B_TRUE))
3742                 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3743
3744         (void) strlcpy(fsname, path, sizeof (fsname));
3745         cp = strchr(fsname, '@');
3746         *cp = '\0';
3747         sd.sd_snapname = cp + 1;
3748
3749         if ((zhp = zfs_open(hdl, fsname, ZFS_TYPE_FILESYSTEM |
3750             ZFS_TYPE_VOLUME)) == NULL) {
3751                 return (-1);
3752         }
3753
3754         verify(nvlist_alloc(&sd.sd_nvl, NV_UNIQUE_NAME, 0) == 0);
3755         if (recursive) {
3756                 (void) zfs_snapshot_cb(zfs_handle_dup(zhp), &sd);
3757         } else {
3758                 fnvlist_add_boolean(sd.sd_nvl, path);
3759         }
3760
3761         ret = zfs_snapshot_nvl(hdl, sd.sd_nvl, props);
3762         nvlist_free(sd.sd_nvl);
3763         zfs_close(zhp);
3764         return (ret);
3765 }
3766
3767 /*
3768  * Destroy any more recent snapshots.  We invoke this callback on any dependents
3769  * of the snapshot first.  If the 'cb_dependent' member is non-zero, then this
3770  * is a dependent and we should just destroy it without checking the transaction
3771  * group.
3772  */
3773 typedef struct rollback_data {
3774         const char      *cb_target;             /* the snapshot */
3775         uint64_t        cb_create;              /* creation time reference */
3776         boolean_t       cb_error;
3777         boolean_t       cb_force;
3778 } rollback_data_t;
3779
3780 static int
3781 rollback_destroy_dependent(zfs_handle_t *zhp, void *data)
3782 {
3783         rollback_data_t *cbp = data;
3784         prop_changelist_t *clp;
3785
3786         /* We must destroy this clone; first unmount it */
3787         clp = changelist_gather(zhp, ZFS_PROP_NAME, 0,
3788             cbp->cb_force ? MS_FORCE: 0);
3789         if (clp == NULL || changelist_prefix(clp) != 0) {
3790                 cbp->cb_error = B_TRUE;
3791                 zfs_close(zhp);
3792                 return (0);
3793         }
3794         if (zfs_destroy(zhp, B_FALSE) != 0)
3795                 cbp->cb_error = B_TRUE;
3796         else
3797                 changelist_remove(clp, zhp->zfs_name);
3798         (void) changelist_postfix(clp);
3799         changelist_free(clp);
3800
3801         zfs_close(zhp);
3802         return (0);
3803 }
3804
3805 static int
3806 rollback_destroy(zfs_handle_t *zhp, void *data)
3807 {
3808         rollback_data_t *cbp = data;
3809
3810         if (zfs_prop_get_int(zhp, ZFS_PROP_CREATETXG) > cbp->cb_create) {
3811                 cbp->cb_error |= zfs_iter_dependents(zhp, B_FALSE,
3812                     rollback_destroy_dependent, cbp);
3813
3814                 cbp->cb_error |= zfs_destroy(zhp, B_FALSE);
3815         }
3816
3817         zfs_close(zhp);
3818         return (0);
3819 }
3820
3821 /*
3822  * Given a dataset, rollback to a specific snapshot, discarding any
3823  * data changes since then and making it the active dataset.
3824  *
3825  * Any snapshots and bookmarks more recent than the target are
3826  * destroyed, along with their dependents (i.e. clones).
3827  */
3828 int
3829 zfs_rollback(zfs_handle_t *zhp, zfs_handle_t *snap, boolean_t force)
3830 {
3831         rollback_data_t cb = { 0 };
3832         int err;
3833         boolean_t restore_resv = 0;
3834         uint64_t old_volsize, new_volsize;
3835         zfs_prop_t resv_prop;
3836
3837         assert(zhp->zfs_type == ZFS_TYPE_FILESYSTEM ||
3838             zhp->zfs_type == ZFS_TYPE_VOLUME);
3839
3840         /*
3841          * Destroy all recent snapshots and their dependents.
3842          */
3843         cb.cb_force = force;
3844         cb.cb_target = snap->zfs_name;
3845         cb.cb_create = zfs_prop_get_int(snap, ZFS_PROP_CREATETXG);
3846         (void) zfs_iter_snapshots(zhp, B_FALSE, rollback_destroy, &cb);
3847         (void) zfs_iter_bookmarks(zhp, rollback_destroy, &cb);
3848
3849         if (cb.cb_error)
3850                 return (-1);
3851
3852         /*
3853          * Now that we have verified that the snapshot is the latest,
3854          * rollback to the given snapshot.
3855          */
3856
3857         if (zhp->zfs_type == ZFS_TYPE_VOLUME) {
3858                 if (zfs_which_resv_prop(zhp, &resv_prop) < 0)
3859                         return (-1);
3860                 old_volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE);
3861                 restore_resv =
3862                     (old_volsize == zfs_prop_get_int(zhp, resv_prop));
3863         }
3864
3865         /*
3866          * We rely on zfs_iter_children() to verify that there are no
3867          * newer snapshots for the given dataset.  Therefore, we can
3868          * simply pass the name on to the ioctl() call.  There is still
3869          * an unlikely race condition where the user has taken a
3870          * snapshot since we verified that this was the most recent.
3871          */
3872         err = lzc_rollback(zhp->zfs_name, NULL, 0);
3873         if (err != 0) {
3874                 (void) zfs_standard_error_fmt(zhp->zfs_hdl, errno,
3875                     dgettext(TEXT_DOMAIN, "cannot rollback '%s'"),
3876                     zhp->zfs_name);
3877                 return (err);
3878         }
3879
3880         /*
3881          * For volumes, if the pre-rollback volsize matched the pre-
3882          * rollback reservation and the volsize has changed then set
3883          * the reservation property to the post-rollback volsize.
3884          * Make a new handle since the rollback closed the dataset.
3885          */
3886         if ((zhp->zfs_type == ZFS_TYPE_VOLUME) &&
3887             (zhp = make_dataset_handle(zhp->zfs_hdl, zhp->zfs_name))) {
3888                 if (restore_resv) {
3889                         new_volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE);
3890                         if (old_volsize != new_volsize)
3891                                 err = zfs_prop_set_int(zhp, resv_prop,
3892                                     new_volsize);
3893                 }
3894                 zfs_close(zhp);
3895         }
3896         return (err);
3897 }
3898
3899 /*
3900  * Renames the given dataset.
3901  */
3902 int
3903 zfs_rename(zfs_handle_t *zhp, const char *source, const char *target,
3904     renameflags_t flags)
3905 {
3906         int ret;
3907         zfs_cmd_t zc = { 0 };
3908         char *delim;
3909         prop_changelist_t *cl = NULL;
3910         zfs_handle_t *zhrp = NULL;
3911         char *parentname = NULL;
3912         char parent[ZFS_MAXNAMELEN];
3913         char property[ZFS_MAXPROPLEN];
3914         libzfs_handle_t *hdl = zhp->zfs_hdl;
3915         char errbuf[1024];
3916
3917         /* if we have the same exact name, just return success */
3918         if (strcmp(zhp->zfs_name, target) == 0)
3919                 return (0);
3920
3921         (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3922             "cannot rename to '%s'"), target);
3923
3924         if (source != NULL) {
3925                 /*
3926                  * This is recursive snapshots rename, put snapshot name
3927                  * (that might not exist) into zfs_name.
3928                  */
3929                 assert(flags.recurse);
3930
3931                 (void) strlcat(zhp->zfs_name, "@", sizeof(zhp->zfs_name));
3932                 (void) strlcat(zhp->zfs_name, source, sizeof(zhp->zfs_name));
3933                 zhp->zfs_type = ZFS_TYPE_SNAPSHOT;
3934         }
3935
3936         /*
3937          * Make sure the target name is valid
3938          */
3939         if (zhp->zfs_type == ZFS_TYPE_SNAPSHOT) {
3940                 if ((strchr(target, '@') == NULL) ||
3941                     *target == '@') {
3942                         /*
3943                          * Snapshot target name is abbreviated,
3944                          * reconstruct full dataset name
3945                          */
3946                         (void) strlcpy(parent, zhp->zfs_name,
3947                             sizeof (parent));
3948                         delim = strchr(parent, '@');
3949                         if (strchr(target, '@') == NULL)
3950                                 *(++delim) = '\0';
3951                         else
3952                                 *delim = '\0';
3953                         (void) strlcat(parent, target, sizeof (parent));
3954                         target = parent;
3955                 } else {
3956                         /*
3957                          * Make sure we're renaming within the same dataset.
3958                          */
3959                         delim = strchr(target, '@');
3960                         if (strncmp(zhp->zfs_name, target, delim - target)
3961                             != 0 || zhp->zfs_name[delim - target] != '@') {
3962                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3963                                     "snapshots must be part of same "
3964                                     "dataset"));
3965                                 return (zfs_error(hdl, EZFS_CROSSTARGET,
3966                                     errbuf));
3967                         }
3968                 }
3969                 if (!zfs_validate_name(hdl, target, zhp->zfs_type, B_TRUE))
3970                         return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3971         } else {
3972                 if (flags.recurse) {
3973                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3974                             "recursive rename must be a snapshot"));
3975                         return (zfs_error(hdl, EZFS_BADTYPE, errbuf));
3976                 }
3977
3978                 if (!zfs_validate_name(hdl, target, zhp->zfs_type, B_TRUE))
3979                         return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3980
3981                 /* validate parents */
3982                 if (check_parents(hdl, target, NULL, B_FALSE, NULL) != 0)
3983                         return (-1);
3984
3985                 /* make sure we're in the same pool */
3986                 verify((delim = strchr(target, '/')) != NULL);
3987                 if (strncmp(zhp->zfs_name, target, delim - target) != 0 ||
3988                     zhp->zfs_name[delim - target] != '/') {
3989                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3990                             "datasets must be within same pool"));
3991                         return (zfs_error(hdl, EZFS_CROSSTARGET, errbuf));
3992                 }
3993
3994                 /* new name cannot be a child of the current dataset name */
3995                 if (is_descendant(zhp->zfs_name, target)) {
3996                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3997                             "New dataset name cannot be a descendant of "
3998                             "current dataset name"));
3999                         return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
4000                 }
4001         }
4002
4003         (void) snprintf(errbuf, sizeof (errbuf),
4004             dgettext(TEXT_DOMAIN, "cannot rename '%s'"), zhp->zfs_name);
4005
4006         if (getzoneid() == GLOBAL_ZONEID &&
4007             zfs_prop_get_int(zhp, ZFS_PROP_ZONED)) {
4008                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4009                     "dataset is used in a non-global zone"));
4010                 return (zfs_error(hdl, EZFS_ZONED, errbuf));
4011         }
4012
4013         /*
4014          * Avoid unmounting file systems with mountpoint property set to
4015          * 'legacy' or 'none' even if -u option is not given.
4016          */
4017         if (zhp->zfs_type == ZFS_TYPE_FILESYSTEM &&
4018             !flags.recurse && !flags.nounmount &&
4019             zfs_prop_get(zhp, ZFS_PROP_MOUNTPOINT, property,
4020             sizeof (property), NULL, NULL, 0, B_FALSE) == 0 &&
4021             (strcmp(property, "legacy") == 0 ||
4022              strcmp(property, "none") == 0)) {
4023                 flags.nounmount = B_TRUE;
4024         }
4025         if (flags.recurse) {
4026
4027                 parentname = zfs_strdup(zhp->zfs_hdl, zhp->zfs_name);
4028                 if (parentname == NULL) {
4029                         ret = -1;
4030                         goto error;
4031                 }
4032                 delim = strchr(parentname, '@');
4033                 *delim = '\0';
4034                 zhrp = zfs_open(zhp->zfs_hdl, parentname, ZFS_TYPE_DATASET);
4035                 if (zhrp == NULL) {
4036                         ret = -1;
4037                         goto error;
4038                 }
4039         } else if (zhp->zfs_type != ZFS_TYPE_SNAPSHOT) {
4040                 if ((cl = changelist_gather(zhp, ZFS_PROP_NAME,
4041                     flags.nounmount ? CL_GATHER_DONT_UNMOUNT : 0,
4042                     flags.forceunmount ? MS_FORCE : 0)) == NULL) {
4043                         return (-1);
4044                 }
4045
4046                 if (changelist_haszonedchild(cl)) {
4047                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4048                             "child dataset with inherited mountpoint is used "
4049                             "in a non-global zone"));
4050                         (void) zfs_error(hdl, EZFS_ZONED, errbuf);
4051                         goto error;
4052                 }
4053
4054                 if ((ret = changelist_prefix(cl)) != 0)
4055                         goto error;
4056         }
4057
4058         if (ZFS_IS_VOLUME(zhp))
4059                 zc.zc_objset_type = DMU_OST_ZVOL;
4060         else
4061                 zc.zc_objset_type = DMU_OST_ZFS;
4062
4063         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
4064         (void) strlcpy(zc.zc_value, target, sizeof (zc.zc_value));
4065
4066         zc.zc_cookie = flags.recurse ? 1 : 0;
4067         if (flags.nounmount)
4068                 zc.zc_cookie |= 2;
4069
4070         if ((ret = zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_RENAME, &zc)) != 0) {
4071                 /*
4072                  * if it was recursive, the one that actually failed will
4073                  * be in zc.zc_name
4074                  */
4075                 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
4076                     "cannot rename '%s'"), zc.zc_name);
4077
4078                 if (flags.recurse && errno == EEXIST) {
4079                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4080                             "a child dataset already has a snapshot "
4081                             "with the new name"));
4082                         (void) zfs_error(hdl, EZFS_EXISTS, errbuf);
4083                 } else {
4084                         (void) zfs_standard_error(zhp->zfs_hdl, errno, errbuf);
4085                 }
4086
4087                 /*
4088                  * On failure, we still want to remount any filesystems that
4089                  * were previously mounted, so we don't alter the system state.
4090                  */
4091                 if (cl != NULL)
4092                         (void) changelist_postfix(cl);
4093         } else {
4094                 if (cl != NULL) {
4095                         changelist_rename(cl, zfs_get_name(zhp), target);
4096                         ret = changelist_postfix(cl);
4097                 }
4098         }
4099
4100 error:
4101         if (parentname != NULL) {
4102                 free(parentname);
4103         }
4104         if (zhrp != NULL) {
4105                 zfs_close(zhrp);
4106         }
4107         if (cl != NULL) {
4108                 changelist_free(cl);
4109         }
4110         return (ret);
4111 }
4112
4113 nvlist_t *
4114 zfs_get_user_props(zfs_handle_t *zhp)
4115 {
4116         return (zhp->zfs_user_props);
4117 }
4118
4119 nvlist_t *
4120 zfs_get_recvd_props(zfs_handle_t *zhp)
4121 {
4122         if (zhp->zfs_recvd_props == NULL)
4123                 if (get_recvd_props_ioctl(zhp) != 0)
4124                         return (NULL);
4125         return (zhp->zfs_recvd_props);
4126 }
4127
4128 /*
4129  * This function is used by 'zfs list' to determine the exact set of columns to
4130  * display, and their maximum widths.  This does two main things:
4131  *
4132  *      - If this is a list of all properties, then expand the list to include
4133  *        all native properties, and set a flag so that for each dataset we look
4134  *        for new unique user properties and add them to the list.
4135  *
4136  *      - For non fixed-width properties, keep track of the maximum width seen
4137  *        so that we can size the column appropriately. If the user has
4138  *        requested received property values, we also need to compute the width
4139  *        of the RECEIVED column.
4140  */
4141 int
4142 zfs_expand_proplist(zfs_handle_t *zhp, zprop_list_t **plp, boolean_t received,
4143     boolean_t literal)
4144 {
4145         libzfs_handle_t *hdl = zhp->zfs_hdl;
4146         zprop_list_t *entry;
4147         zprop_list_t **last, **start;
4148         nvlist_t *userprops, *propval;
4149         nvpair_t *elem;
4150         char *strval;
4151         char buf[ZFS_MAXPROPLEN];
4152
4153         if (zprop_expand_list(hdl, plp, ZFS_TYPE_DATASET) != 0)
4154                 return (-1);
4155
4156         userprops = zfs_get_user_props(zhp);
4157
4158         entry = *plp;
4159         if (entry->pl_all && nvlist_next_nvpair(userprops, NULL) != NULL) {
4160                 /*
4161                  * Go through and add any user properties as necessary.  We
4162                  * start by incrementing our list pointer to the first
4163                  * non-native property.
4164                  */
4165                 start = plp;
4166                 while (*start != NULL) {
4167                         if ((*start)->pl_prop == ZPROP_INVAL)
4168                                 break;
4169                         start = &(*start)->pl_next;
4170                 }
4171
4172                 elem = NULL;
4173                 while ((elem = nvlist_next_nvpair(userprops, elem)) != NULL) {
4174                         /*
4175                          * See if we've already found this property in our list.
4176                          */
4177                         for (last = start; *last != NULL;
4178                             last = &(*last)->pl_next) {
4179                                 if (strcmp((*last)->pl_user_prop,
4180                                     nvpair_name(elem)) == 0)
4181                                         break;
4182                         }
4183
4184                         if (*last == NULL) {
4185                                 if ((entry = zfs_alloc(hdl,
4186                                     sizeof (zprop_list_t))) == NULL ||
4187                                     ((entry->pl_user_prop = zfs_strdup(hdl,
4188                                     nvpair_name(elem)))) == NULL) {
4189                                         free(entry);
4190                                         return (-1);
4191                                 }
4192
4193                                 entry->pl_prop = ZPROP_INVAL;
4194                                 entry->pl_width = strlen(nvpair_name(elem));
4195                                 entry->pl_all = B_TRUE;
4196                                 *last = entry;
4197                         }
4198                 }
4199         }
4200
4201         /*
4202          * Now go through and check the width of any non-fixed columns
4203          */
4204         for (entry = *plp; entry != NULL; entry = entry->pl_next) {
4205                 if (entry->pl_fixed && !literal)
4206                         continue;
4207
4208                 if (entry->pl_prop != ZPROP_INVAL) {
4209                         if (zfs_prop_get(zhp, entry->pl_prop,
4210                             buf, sizeof (buf), NULL, NULL, 0, literal) == 0) {
4211                                 if (strlen(buf) > entry->pl_width)
4212                                         entry->pl_width = strlen(buf);
4213                         }
4214                         if (received && zfs_prop_get_recvd(zhp,
4215                             zfs_prop_to_name(entry->pl_prop),
4216                             buf, sizeof (buf), literal) == 0)
4217                                 if (strlen(buf) > entry->pl_recvd_width)
4218                                         entry->pl_recvd_width = strlen(buf);
4219                 } else {
4220                         if (nvlist_lookup_nvlist(userprops, entry->pl_user_prop,
4221                             &propval) == 0) {
4222                                 verify(nvlist_lookup_string(propval,
4223                                     ZPROP_VALUE, &strval) == 0);
4224                                 if (strlen(strval) > entry->pl_width)
4225                                         entry->pl_width = strlen(strval);
4226                         }
4227                         if (received && zfs_prop_get_recvd(zhp,
4228                             entry->pl_user_prop,
4229                             buf, sizeof (buf), literal) == 0)
4230                                 if (strlen(buf) > entry->pl_recvd_width)
4231                                         entry->pl_recvd_width = strlen(buf);
4232                 }
4233         }
4234
4235         return (0);
4236 }
4237
4238 int
4239 zfs_deleg_share_nfs(libzfs_handle_t *hdl, char *dataset, char *path,
4240     char *resource, void *export, void *sharetab,
4241     int sharemax, zfs_share_op_t operation)
4242 {
4243         zfs_cmd_t zc = { 0 };
4244         int error;
4245
4246         (void) strlcpy(zc.zc_name, dataset, sizeof (zc.zc_name));
4247         (void) strlcpy(zc.zc_value, path, sizeof (zc.zc_value));
4248         if (resource)
4249                 (void) strlcpy(zc.zc_string, resource, sizeof (zc.zc_string));
4250         zc.zc_share.z_sharedata = (uint64_t)(uintptr_t)sharetab;
4251         zc.zc_share.z_exportdata = (uint64_t)(uintptr_t)export;
4252         zc.zc_share.z_sharetype = operation;
4253         zc.zc_share.z_sharemax = sharemax;
4254         error = ioctl(hdl->libzfs_fd, ZFS_IOC_SHARE, &zc);
4255         return (error);
4256 }
4257
4258 void
4259 zfs_prune_proplist(zfs_handle_t *zhp, uint8_t *props)
4260 {
4261         nvpair_t *curr;
4262
4263         /*
4264          * Keep a reference to the props-table against which we prune the
4265          * properties.
4266          */
4267         zhp->zfs_props_table = props;
4268
4269         curr = nvlist_next_nvpair(zhp->zfs_props, NULL);
4270
4271         while (curr) {
4272                 zfs_prop_t zfs_prop = zfs_name_to_prop(nvpair_name(curr));
4273                 nvpair_t *next = nvlist_next_nvpair(zhp->zfs_props, curr);
4274
4275                 /*
4276                  * User properties will result in ZPROP_INVAL, and since we
4277                  * only know how to prune standard ZFS properties, we always
4278                  * leave these in the list.  This can also happen if we
4279                  * encounter an unknown DSL property (when running older
4280                  * software, for example).
4281                  */
4282                 if (zfs_prop != ZPROP_INVAL && props[zfs_prop] == B_FALSE)
4283                         (void) nvlist_remove(zhp->zfs_props,
4284                             nvpair_name(curr), nvpair_type(curr));
4285                 curr = next;
4286         }
4287 }
4288
4289 #ifdef illumos
4290 static int
4291 zfs_smb_acl_mgmt(libzfs_handle_t *hdl, char *dataset, char *path,
4292     zfs_smb_acl_op_t cmd, char *resource1, char *resource2)
4293 {
4294         zfs_cmd_t zc = { 0 };
4295         nvlist_t *nvlist = NULL;
4296         int error;
4297
4298         (void) strlcpy(zc.zc_name, dataset, sizeof (zc.zc_name));
4299         (void) strlcpy(zc.zc_value, path, sizeof (zc.zc_value));
4300         zc.zc_cookie = (uint64_t)cmd;
4301
4302         if (cmd == ZFS_SMB_ACL_RENAME) {
4303                 if (nvlist_alloc(&nvlist, NV_UNIQUE_NAME, 0) != 0) {
4304                         (void) no_memory(hdl);
4305                         return (0);
4306                 }
4307         }
4308
4309         switch (cmd) {
4310         case ZFS_SMB_ACL_ADD:
4311         case ZFS_SMB_ACL_REMOVE:
4312                 (void) strlcpy(zc.zc_string, resource1, sizeof (zc.zc_string));
4313                 break;
4314         case ZFS_SMB_ACL_RENAME:
4315                 if (nvlist_add_string(nvlist, ZFS_SMB_ACL_SRC,
4316                     resource1) != 0) {
4317                                 (void) no_memory(hdl);
4318                                 return (-1);
4319                 }
4320                 if (nvlist_add_string(nvlist, ZFS_SMB_ACL_TARGET,
4321                     resource2) != 0) {
4322                                 (void) no_memory(hdl);
4323                                 return (-1);
4324                 }
4325                 if (zcmd_write_src_nvlist(hdl, &zc, nvlist) != 0) {
4326                         nvlist_free(nvlist);
4327                         return (-1);
4328                 }
4329                 break;
4330         case ZFS_SMB_ACL_PURGE:
4331                 break;
4332         default:
4333                 return (-1);
4334         }
4335         error = ioctl(hdl->libzfs_fd, ZFS_IOC_SMB_ACL, &zc);
4336         nvlist_free(nvlist);
4337         return (error);
4338 }
4339
4340 int
4341 zfs_smb_acl_add(libzfs_handle_t *hdl, char *dataset,
4342     char *path, char *resource)
4343 {
4344         return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_ADD,
4345             resource, NULL));
4346 }
4347
4348 int
4349 zfs_smb_acl_remove(libzfs_handle_t *hdl, char *dataset,
4350     char *path, char *resource)
4351 {
4352         return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_REMOVE,
4353             resource, NULL));
4354 }
4355
4356 int
4357 zfs_smb_acl_purge(libzfs_handle_t *hdl, char *dataset, char *path)
4358 {
4359         return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_PURGE,
4360             NULL, NULL));
4361 }
4362
4363 int
4364 zfs_smb_acl_rename(libzfs_handle_t *hdl, char *dataset, char *path,
4365     char *oldname, char *newname)
4366 {
4367         return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_RENAME,
4368             oldname, newname));
4369 }
4370 #endif  /* illumos */
4371
4372 int
4373 zfs_userspace(zfs_handle_t *zhp, zfs_userquota_prop_t type,
4374     zfs_userspace_cb_t func, void *arg)
4375 {
4376         zfs_cmd_t zc = { 0 };
4377         zfs_useracct_t buf[100];
4378         libzfs_handle_t *hdl = zhp->zfs_hdl;
4379         int ret;
4380
4381         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
4382
4383         zc.zc_objset_type = type;
4384         zc.zc_nvlist_dst = (uintptr_t)buf;
4385
4386         for (;;) {
4387                 zfs_useracct_t *zua = buf;
4388
4389                 zc.zc_nvlist_dst_size = sizeof (buf);
4390                 if (zfs_ioctl(hdl, ZFS_IOC_USERSPACE_MANY, &zc) != 0) {
4391                         char errbuf[1024];
4392
4393                         (void) snprintf(errbuf, sizeof (errbuf),
4394                             dgettext(TEXT_DOMAIN,
4395                             "cannot get used/quota for %s"), zc.zc_name);
4396                         return (zfs_standard_error_fmt(hdl, errno, errbuf));
4397                 }
4398                 if (zc.zc_nvlist_dst_size == 0)
4399                         break;
4400
4401                 while (zc.zc_nvlist_dst_size > 0) {
4402                         if ((ret = func(arg, zua->zu_domain, zua->zu_rid,
4403                             zua->zu_space)) != 0)
4404                                 return (ret);
4405                         zua++;
4406                         zc.zc_nvlist_dst_size -= sizeof (zfs_useracct_t);
4407                 }
4408         }
4409
4410         return (0);
4411 }
4412
4413 struct holdarg {
4414         nvlist_t *nvl;
4415         const char *snapname;
4416         const char *tag;
4417         boolean_t recursive;
4418         int error;
4419 };
4420
4421 static int
4422 zfs_hold_one(zfs_handle_t *zhp, void *arg)
4423 {
4424         struct holdarg *ha = arg;
4425         char name[ZFS_MAXNAMELEN];
4426         int rv = 0;
4427
4428         (void) snprintf(name, sizeof (name),
4429             "%s@%s", zhp->zfs_name, ha->snapname);
4430
4431         if (lzc_exists(name))
4432                 fnvlist_add_string(ha->nvl, name, ha->tag);
4433
4434         if (ha->recursive)
4435                 rv = zfs_iter_filesystems(zhp, zfs_hold_one, ha);
4436         zfs_close(zhp);
4437         return (rv);
4438 }
4439
4440 int
4441 zfs_hold(zfs_handle_t *zhp, const char *snapname, const char *tag,
4442     boolean_t recursive, int cleanup_fd)
4443 {
4444         int ret;
4445         struct holdarg ha;
4446
4447         ha.nvl = fnvlist_alloc();
4448         ha.snapname = snapname;
4449         ha.tag = tag;
4450         ha.recursive = recursive;
4451         (void) zfs_hold_one(zfs_handle_dup(zhp), &ha);
4452
4453         if (nvlist_empty(ha.nvl)) {
4454                 char errbuf[1024];
4455
4456                 fnvlist_free(ha.nvl);
4457                 ret = ENOENT;
4458                 (void) snprintf(errbuf, sizeof (errbuf),
4459                     dgettext(TEXT_DOMAIN,
4460                     "cannot hold snapshot '%s@%s'"),
4461                     zhp->zfs_name, snapname);
4462                 (void) zfs_standard_error(zhp->zfs_hdl, ret, errbuf);
4463                 return (ret);
4464         }
4465
4466         ret = zfs_hold_nvl(zhp, cleanup_fd, ha.nvl);
4467         fnvlist_free(ha.nvl);
4468
4469         return (ret);
4470 }
4471
4472 int
4473 zfs_hold_nvl(zfs_handle_t *zhp, int cleanup_fd, nvlist_t *holds)
4474 {
4475         int ret;
4476         nvlist_t *errors;
4477         libzfs_handle_t *hdl = zhp->zfs_hdl;
4478         char errbuf[1024];
4479         nvpair_t *elem;
4480
4481         errors = NULL;
4482         ret = lzc_hold(holds, cleanup_fd, &errors);
4483
4484         if (ret == 0) {
4485                 /* There may be errors even in the success case. */
4486                 fnvlist_free(errors);
4487                 return (0);
4488         }
4489
4490         if (nvlist_empty(errors)) {
4491                 /* no hold-specific errors */
4492                 (void) snprintf(errbuf, sizeof (errbuf),
4493                     dgettext(TEXT_DOMAIN, "cannot hold"));
4494                 switch (ret) {
4495                 case ENOTSUP:
4496                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4497                             "pool must be upgraded"));
4498                         (void) zfs_error(hdl, EZFS_BADVERSION, errbuf);
4499                         break;
4500                 case EINVAL:
4501                         (void) zfs_error(hdl, EZFS_BADTYPE, errbuf);
4502                         break;
4503                 default:
4504                         (void) zfs_standard_error(hdl, ret, errbuf);
4505                 }
4506         }
4507
4508         for (elem = nvlist_next_nvpair(errors, NULL);
4509             elem != NULL;
4510             elem = nvlist_next_nvpair(errors, elem)) {
4511                 (void) snprintf(errbuf, sizeof (errbuf),
4512                     dgettext(TEXT_DOMAIN,
4513                     "cannot hold snapshot '%s'"), nvpair_name(elem));
4514                 switch (fnvpair_value_int32(elem)) {
4515                 case E2BIG:
4516                         /*
4517                          * Temporary tags wind up having the ds object id
4518                          * prepended. So even if we passed the length check
4519                          * above, it's still possible for the tag to wind
4520                          * up being slightly too long.
4521                          */
4522                         (void) zfs_error(hdl, EZFS_TAGTOOLONG, errbuf);
4523                         break;
4524                 case EINVAL:
4525                         (void) zfs_error(hdl, EZFS_BADTYPE, errbuf);
4526                         break;
4527                 case EEXIST:
4528                         (void) zfs_error(hdl, EZFS_REFTAG_HOLD, errbuf);
4529                         break;
4530                 default:
4531                         (void) zfs_standard_error(hdl,
4532                             fnvpair_value_int32(elem), errbuf);
4533                 }
4534         }
4535
4536         fnvlist_free(errors);
4537         return (ret);
4538 }
4539
4540 static int
4541 zfs_release_one(zfs_handle_t *zhp, void *arg)
4542 {
4543         struct holdarg *ha = arg;
4544         char name[ZFS_MAXNAMELEN];
4545         int rv = 0;
4546         nvlist_t *existing_holds;
4547
4548         (void) snprintf(name, sizeof (name),
4549             "%s@%s", zhp->zfs_name, ha->snapname);
4550
4551         if (lzc_get_holds(name, &existing_holds) != 0) {
4552                 ha->error = ENOENT;
4553         } else if (!nvlist_exists(existing_holds, ha->tag)) {
4554                 ha->error = ESRCH;
4555         } else {
4556                 nvlist_t *torelease = fnvlist_alloc();
4557                 fnvlist_add_boolean(torelease, ha->tag);
4558                 fnvlist_add_nvlist(ha->nvl, name, torelease);
4559                 fnvlist_free(torelease);
4560         }
4561
4562         if (ha->recursive)
4563                 rv = zfs_iter_filesystems(zhp, zfs_release_one, ha);
4564         zfs_close(zhp);
4565         return (rv);
4566 }
4567
4568 int
4569 zfs_release(zfs_handle_t *zhp, const char *snapname, const char *tag,
4570     boolean_t recursive)
4571 {
4572         int ret;
4573         struct holdarg ha;
4574         nvlist_t *errors = NULL;
4575         nvpair_t *elem;
4576         libzfs_handle_t *hdl = zhp->zfs_hdl;
4577         char errbuf[1024];
4578
4579         ha.nvl = fnvlist_alloc();
4580         ha.snapname = snapname;
4581         ha.tag = tag;
4582         ha.recursive = recursive;
4583         ha.error = 0;
4584         (void) zfs_release_one(zfs_handle_dup(zhp), &ha);
4585
4586         if (nvlist_empty(ha.nvl)) {
4587                 fnvlist_free(ha.nvl);
4588                 ret = ha.error;
4589                 (void) snprintf(errbuf, sizeof (errbuf),
4590                     dgettext(TEXT_DOMAIN,
4591                     "cannot release hold from snapshot '%s@%s'"),
4592                     zhp->zfs_name, snapname);
4593                 if (ret == ESRCH) {
4594                         (void) zfs_error(hdl, EZFS_REFTAG_RELE, errbuf);
4595                 } else {
4596                         (void) zfs_standard_error(hdl, ret, errbuf);
4597                 }
4598                 return (ret);
4599         }
4600
4601         ret = lzc_release(ha.nvl, &errors);
4602         fnvlist_free(ha.nvl);
4603
4604         if (ret == 0) {
4605                 /* There may be errors even in the success case. */
4606                 fnvlist_free(errors);
4607                 return (0);
4608         }
4609
4610         if (nvlist_empty(errors)) {
4611                 /* no hold-specific errors */
4612                 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
4613                     "cannot release"));
4614                 switch (errno) {
4615                 case ENOTSUP:
4616                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4617                             "pool must be upgraded"));
4618                         (void) zfs_error(hdl, EZFS_BADVERSION, errbuf);
4619                         break;
4620                 default:
4621                         (void) zfs_standard_error_fmt(hdl, errno, errbuf);
4622                 }
4623         }
4624
4625         for (elem = nvlist_next_nvpair(errors, NULL);
4626             elem != NULL;
4627             elem = nvlist_next_nvpair(errors, elem)) {
4628                 (void) snprintf(errbuf, sizeof (errbuf),
4629                     dgettext(TEXT_DOMAIN,
4630                     "cannot release hold from snapshot '%s'"),
4631                     nvpair_name(elem));
4632                 switch (fnvpair_value_int32(elem)) {
4633                 case ESRCH:
4634                         (void) zfs_error(hdl, EZFS_REFTAG_RELE, errbuf);
4635                         break;
4636                 case EINVAL:
4637                         (void) zfs_error(hdl, EZFS_BADTYPE, errbuf);
4638                         break;
4639                 default:
4640                         (void) zfs_standard_error_fmt(hdl,
4641                             fnvpair_value_int32(elem), errbuf);
4642                 }
4643         }
4644
4645         fnvlist_free(errors);
4646         return (ret);
4647 }
4648
4649 int
4650 zfs_get_fsacl(zfs_handle_t *zhp, nvlist_t **nvl)
4651 {
4652         zfs_cmd_t zc = { 0 };
4653         libzfs_handle_t *hdl = zhp->zfs_hdl;
4654         int nvsz = 2048;
4655         void *nvbuf;
4656         int err = 0;
4657         char errbuf[1024];
4658
4659         assert(zhp->zfs_type == ZFS_TYPE_VOLUME ||
4660             zhp->zfs_type == ZFS_TYPE_FILESYSTEM);
4661
4662 tryagain:
4663
4664         nvbuf = malloc(nvsz);
4665         if (nvbuf == NULL) {
4666                 err = (zfs_error(hdl, EZFS_NOMEM, strerror(errno)));
4667                 goto out;
4668         }
4669
4670         zc.zc_nvlist_dst_size = nvsz;
4671         zc.zc_nvlist_dst = (uintptr_t)nvbuf;
4672
4673         (void) strlcpy(zc.zc_name, zhp->zfs_name, ZFS_MAXNAMELEN);
4674
4675         if (ioctl(hdl->libzfs_fd, ZFS_IOC_GET_FSACL, &zc) != 0) {
4676                 (void) snprintf(errbuf, sizeof (errbuf),
4677                     dgettext(TEXT_DOMAIN, "cannot get permissions on '%s'"),
4678                     zc.zc_name);
4679                 switch (errno) {
4680                 case ENOMEM:
4681                         free(nvbuf);
4682                         nvsz = zc.zc_nvlist_dst_size;
4683                         goto tryagain;
4684
4685                 case ENOTSUP:
4686                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4687                             "pool must be upgraded"));
4688                         err = zfs_error(hdl, EZFS_BADVERSION, errbuf);
4689                         break;
4690                 case EINVAL:
4691                         err = zfs_error(hdl, EZFS_BADTYPE, errbuf);
4692                         break;
4693                 case ENOENT:
4694                         err = zfs_error(hdl, EZFS_NOENT, errbuf);
4695                         break;
4696                 default:
4697                         err = zfs_standard_error_fmt(hdl, errno, errbuf);
4698                         break;
4699                 }
4700         } else {
4701                 /* success */
4702                 int rc = nvlist_unpack(nvbuf, zc.zc_nvlist_dst_size, nvl, 0);
4703                 if (rc) {
4704                         (void) snprintf(errbuf, sizeof (errbuf), dgettext(
4705                             TEXT_DOMAIN, "cannot get permissions on '%s'"),
4706                             zc.zc_name);
4707                         err = zfs_standard_error_fmt(hdl, rc, errbuf);
4708                 }
4709         }
4710
4711         free(nvbuf);
4712 out:
4713         return (err);
4714 }
4715
4716 int
4717 zfs_set_fsacl(zfs_handle_t *zhp, boolean_t un, nvlist_t *nvl)
4718 {
4719         zfs_cmd_t zc = { 0 };
4720         libzfs_handle_t *hdl = zhp->zfs_hdl;
4721         char *nvbuf;
4722         char errbuf[1024];
4723         size_t nvsz;
4724         int err;
4725
4726         assert(zhp->zfs_type == ZFS_TYPE_VOLUME ||
4727             zhp->zfs_type == ZFS_TYPE_FILESYSTEM);
4728
4729         err = nvlist_size(nvl, &nvsz, NV_ENCODE_NATIVE);
4730         assert(err == 0);
4731
4732         nvbuf = malloc(nvsz);
4733
4734         err = nvlist_pack(nvl, &nvbuf, &nvsz, NV_ENCODE_NATIVE, 0);
4735         assert(err == 0);
4736
4737         zc.zc_nvlist_src_size = nvsz;
4738         zc.zc_nvlist_src = (uintptr_t)nvbuf;
4739         zc.zc_perm_action = un;
4740
4741         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
4742
4743         if (zfs_ioctl(hdl, ZFS_IOC_SET_FSACL, &zc) != 0) {
4744                 (void) snprintf(errbuf, sizeof (errbuf),
4745                     dgettext(TEXT_DOMAIN, "cannot set permissions on '%s'"),
4746                     zc.zc_name);
4747                 switch (errno) {
4748                 case ENOTSUP:
4749                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4750                             "pool must be upgraded"));
4751                         err = zfs_error(hdl, EZFS_BADVERSION, errbuf);
4752                         break;
4753                 case EINVAL:
4754                         err = zfs_error(hdl, EZFS_BADTYPE, errbuf);
4755                         break;
4756                 case ENOENT:
4757                         err = zfs_error(hdl, EZFS_NOENT, errbuf);
4758                         break;
4759                 default:
4760                         err = zfs_standard_error_fmt(hdl, errno, errbuf);
4761                         break;
4762                 }
4763         }
4764
4765         free(nvbuf);
4766
4767         return (err);
4768 }
4769
4770 int
4771 zfs_get_holds(zfs_handle_t *zhp, nvlist_t **nvl)
4772 {
4773         int err;
4774         char errbuf[1024];
4775
4776         err = lzc_get_holds(zhp->zfs_name, nvl);
4777
4778         if (err != 0) {
4779                 libzfs_handle_t *hdl = zhp->zfs_hdl;
4780
4781                 (void) snprintf(errbuf, sizeof (errbuf),
4782                     dgettext(TEXT_DOMAIN, "cannot get holds for '%s'"),
4783                     zhp->zfs_name);
4784                 switch (err) {
4785                 case ENOTSUP:
4786                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4787                             "pool must be upgraded"));
4788                         err = zfs_error(hdl, EZFS_BADVERSION, errbuf);
4789                         break;
4790                 case EINVAL:
4791                         err = zfs_error(hdl, EZFS_BADTYPE, errbuf);
4792                         break;
4793                 case ENOENT:
4794                         err = zfs_error(hdl, EZFS_NOENT, errbuf);
4795                         break;
4796                 default:
4797                         err = zfs_standard_error_fmt(hdl, errno, errbuf);
4798                         break;
4799                 }
4800         }
4801
4802         return (err);
4803 }
4804
4805 /*
4806  * Convert the zvol's volume size to an appropriate reservation.
4807  * Note: If this routine is updated, it is necessary to update the ZFS test
4808  * suite's shell version in reservation.kshlib.
4809  */
4810 uint64_t
4811 zvol_volsize_to_reservation(uint64_t volsize, nvlist_t *props)
4812 {
4813         uint64_t numdb;
4814         uint64_t nblocks, volblocksize;
4815         int ncopies;
4816         char *strval;
4817
4818         if (nvlist_lookup_string(props,
4819             zfs_prop_to_name(ZFS_PROP_COPIES), &strval) == 0)
4820                 ncopies = atoi(strval);
4821         else
4822                 ncopies = 1;
4823         if (nvlist_lookup_uint64(props,
4824             zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE),
4825             &volblocksize) != 0)
4826                 volblocksize = ZVOL_DEFAULT_BLOCKSIZE;
4827         nblocks = volsize/volblocksize;
4828         /* start with metadnode L0-L6 */
4829         numdb = 7;
4830         /* calculate number of indirects */
4831         while (nblocks > 1) {
4832                 nblocks += DNODES_PER_LEVEL - 1;
4833                 nblocks /= DNODES_PER_LEVEL;
4834                 numdb += nblocks;
4835         }
4836         numdb *= MIN(SPA_DVAS_PER_BP, ncopies + 1);
4837         volsize *= ncopies;
4838         /*
4839          * this is exactly DN_MAX_INDBLKSHIFT when metadata isn't
4840          * compressed, but in practice they compress down to about
4841          * 1100 bytes
4842          */
4843         numdb *= 1ULL << DN_MAX_INDBLKSHIFT;
4844         volsize += numdb;
4845         return (volsize);
4846 }
4847
4848 /*
4849  * Attach/detach the given filesystem to/from the given jail.
4850  */
4851 int
4852 zfs_jail(zfs_handle_t *zhp, int jailid, int attach)
4853 {
4854         libzfs_handle_t *hdl = zhp->zfs_hdl;
4855         zfs_cmd_t zc = { 0 };
4856         char errbuf[1024];
4857         unsigned long cmd;
4858         int ret;
4859
4860         if (attach) {
4861                 (void) snprintf(errbuf, sizeof (errbuf),
4862                     dgettext(TEXT_DOMAIN, "cannot jail '%s'"), zhp->zfs_name);
4863         } else {
4864                 (void) snprintf(errbuf, sizeof (errbuf),
4865                     dgettext(TEXT_DOMAIN, "cannot unjail '%s'"), zhp->zfs_name);
4866         }
4867
4868         switch (zhp->zfs_type) {
4869         case ZFS_TYPE_VOLUME:
4870                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4871                     "volumes can not be jailed"));
4872                 return (zfs_error(hdl, EZFS_BADTYPE, errbuf));
4873         case ZFS_TYPE_SNAPSHOT:
4874                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4875                     "snapshots can not be jailed"));
4876                 return (zfs_error(hdl, EZFS_BADTYPE, errbuf));
4877         }
4878         assert(zhp->zfs_type == ZFS_TYPE_FILESYSTEM);
4879
4880         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
4881         zc.zc_objset_type = DMU_OST_ZFS;
4882         zc.zc_jailid = jailid;
4883
4884         cmd = attach ? ZFS_IOC_JAIL : ZFS_IOC_UNJAIL;
4885         if ((ret = ioctl(hdl->libzfs_fd, cmd, &zc)) != 0)
4886                 zfs_standard_error(hdl, errno, errbuf);
4887
4888         return (ret);
4889 }