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                 if (zplprops)
2062                         nvlist_free(zplprops);
2063                 zcmd_free_nvlists(&zc);
2064                 break;
2065
2066         case ZFS_PROP_INCONSISTENT:
2067                 *val = zhp->zfs_dmustats.dds_inconsistent;
2068                 break;
2069
2070         default:
2071                 switch (zfs_prop_get_type(prop)) {
2072                 case PROP_TYPE_NUMBER:
2073                 case PROP_TYPE_INDEX:
2074                         *val = getprop_uint64(zhp, prop, source);
2075                         /*
2076                          * If we tried to use a default value for a
2077                          * readonly property, it means that it was not
2078                          * present.
2079                          */
2080                         if (zfs_prop_readonly(prop) &&
2081                             *source != NULL && (*source)[0] == '\0') {
2082                                 *source = NULL;
2083                         }
2084                         break;
2085
2086                 case PROP_TYPE_STRING:
2087                 default:
2088                         zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN,
2089                             "cannot get non-numeric property"));
2090                         return (zfs_error(zhp->zfs_hdl, EZFS_BADPROP,
2091                             dgettext(TEXT_DOMAIN, "internal error")));
2092                 }
2093         }
2094
2095         return (0);
2096 }
2097
2098 /*
2099  * Calculate the source type, given the raw source string.
2100  */
2101 static void
2102 get_source(zfs_handle_t *zhp, zprop_source_t *srctype, char *source,
2103     char *statbuf, size_t statlen)
2104 {
2105         if (statbuf == NULL || *srctype == ZPROP_SRC_TEMPORARY)
2106                 return;
2107
2108         if (source == NULL) {
2109                 *srctype = ZPROP_SRC_NONE;
2110         } else if (source[0] == '\0') {
2111                 *srctype = ZPROP_SRC_DEFAULT;
2112         } else if (strstr(source, ZPROP_SOURCE_VAL_RECVD) != NULL) {
2113                 *srctype = ZPROP_SRC_RECEIVED;
2114         } else {
2115                 if (strcmp(source, zhp->zfs_name) == 0) {
2116                         *srctype = ZPROP_SRC_LOCAL;
2117                 } else {
2118                         (void) strlcpy(statbuf, source, statlen);
2119                         *srctype = ZPROP_SRC_INHERITED;
2120                 }
2121         }
2122
2123 }
2124
2125 int
2126 zfs_prop_get_recvd(zfs_handle_t *zhp, const char *propname, char *propbuf,
2127     size_t proplen, boolean_t literal)
2128 {
2129         zfs_prop_t prop;
2130         int err = 0;
2131
2132         if (zhp->zfs_recvd_props == NULL)
2133                 if (get_recvd_props_ioctl(zhp) != 0)
2134                         return (-1);
2135
2136         prop = zfs_name_to_prop(propname);
2137
2138         if (prop != ZPROP_INVAL) {
2139                 uint64_t cookie;
2140                 if (!nvlist_exists(zhp->zfs_recvd_props, propname))
2141                         return (-1);
2142                 zfs_set_recvd_props_mode(zhp, &cookie);
2143                 err = zfs_prop_get(zhp, prop, propbuf, proplen,
2144                     NULL, NULL, 0, literal);
2145                 zfs_unset_recvd_props_mode(zhp, &cookie);
2146         } else {
2147                 nvlist_t *propval;
2148                 char *recvdval;
2149                 if (nvlist_lookup_nvlist(zhp->zfs_recvd_props,
2150                     propname, &propval) != 0)
2151                         return (-1);
2152                 verify(nvlist_lookup_string(propval, ZPROP_VALUE,
2153                     &recvdval) == 0);
2154                 (void) strlcpy(propbuf, recvdval, proplen);
2155         }
2156
2157         return (err == 0 ? 0 : -1);
2158 }
2159
2160 static int
2161 get_clones_string(zfs_handle_t *zhp, char *propbuf, size_t proplen)
2162 {
2163         nvlist_t *value;
2164         nvpair_t *pair;
2165
2166         value = zfs_get_clones_nvl(zhp);
2167         if (value == NULL)
2168                 return (-1);
2169
2170         propbuf[0] = '\0';
2171         for (pair = nvlist_next_nvpair(value, NULL); pair != NULL;
2172             pair = nvlist_next_nvpair(value, pair)) {
2173                 if (propbuf[0] != '\0')
2174                         (void) strlcat(propbuf, ",", proplen);
2175                 (void) strlcat(propbuf, nvpair_name(pair), proplen);
2176         }
2177
2178         return (0);
2179 }
2180
2181 struct get_clones_arg {
2182         uint64_t numclones;
2183         nvlist_t *value;
2184         const char *origin;
2185         char buf[ZFS_MAXNAMELEN];
2186 };
2187
2188 int
2189 get_clones_cb(zfs_handle_t *zhp, void *arg)
2190 {
2191         struct get_clones_arg *gca = arg;
2192
2193         if (gca->numclones == 0) {
2194                 zfs_close(zhp);
2195                 return (0);
2196         }
2197
2198         if (zfs_prop_get(zhp, ZFS_PROP_ORIGIN, gca->buf, sizeof (gca->buf),
2199             NULL, NULL, 0, B_TRUE) != 0)
2200                 goto out;
2201         if (strcmp(gca->buf, gca->origin) == 0) {
2202                 fnvlist_add_boolean(gca->value, zfs_get_name(zhp));
2203                 gca->numclones--;
2204         }
2205
2206 out:
2207         (void) zfs_iter_children(zhp, get_clones_cb, gca);
2208         zfs_close(zhp);
2209         return (0);
2210 }
2211
2212 nvlist_t *
2213 zfs_get_clones_nvl(zfs_handle_t *zhp)
2214 {
2215         nvlist_t *nv, *value;
2216
2217         if (nvlist_lookup_nvlist(zhp->zfs_props,
2218             zfs_prop_to_name(ZFS_PROP_CLONES), &nv) != 0) {
2219                 struct get_clones_arg gca;
2220
2221                 /*
2222                  * if this is a snapshot, then the kernel wasn't able
2223                  * to get the clones.  Do it by slowly iterating.
2224                  */
2225                 if (zhp->zfs_type != ZFS_TYPE_SNAPSHOT)
2226                         return (NULL);
2227                 if (nvlist_alloc(&nv, NV_UNIQUE_NAME, 0) != 0)
2228                         return (NULL);
2229                 if (nvlist_alloc(&value, NV_UNIQUE_NAME, 0) != 0) {
2230                         nvlist_free(nv);
2231                         return (NULL);
2232                 }
2233
2234                 gca.numclones = zfs_prop_get_int(zhp, ZFS_PROP_NUMCLONES);
2235                 gca.value = value;
2236                 gca.origin = zhp->zfs_name;
2237
2238                 if (gca.numclones != 0) {
2239                         zfs_handle_t *root;
2240                         char pool[ZFS_MAXNAMELEN];
2241                         char *cp = pool;
2242
2243                         /* get the pool name */
2244                         (void) strlcpy(pool, zhp->zfs_name, sizeof (pool));
2245                         (void) strsep(&cp, "/@");
2246                         root = zfs_open(zhp->zfs_hdl, pool,
2247                             ZFS_TYPE_FILESYSTEM);
2248
2249                         (void) get_clones_cb(root, &gca);
2250                 }
2251
2252                 if (gca.numclones != 0 ||
2253                     nvlist_add_nvlist(nv, ZPROP_VALUE, value) != 0 ||
2254                     nvlist_add_nvlist(zhp->zfs_props,
2255                     zfs_prop_to_name(ZFS_PROP_CLONES), nv) != 0) {
2256                         nvlist_free(nv);
2257                         nvlist_free(value);
2258                         return (NULL);
2259                 }
2260                 nvlist_free(nv);
2261                 nvlist_free(value);
2262                 verify(0 == nvlist_lookup_nvlist(zhp->zfs_props,
2263                     zfs_prop_to_name(ZFS_PROP_CLONES), &nv));
2264         }
2265
2266         verify(nvlist_lookup_nvlist(nv, ZPROP_VALUE, &value) == 0);
2267
2268         return (value);
2269 }
2270
2271 /*
2272  * Retrieve a property from the given object.  If 'literal' is specified, then
2273  * numbers are left as exact values.  Otherwise, numbers are converted to a
2274  * human-readable form.
2275  *
2276  * Returns 0 on success, or -1 on error.
2277  */
2278 int
2279 zfs_prop_get(zfs_handle_t *zhp, zfs_prop_t prop, char *propbuf, size_t proplen,
2280     zprop_source_t *src, char *statbuf, size_t statlen, boolean_t literal)
2281 {
2282         char *source = NULL;
2283         uint64_t val;
2284         const char *str;
2285         const char *strval;
2286         boolean_t received = zfs_is_recvd_props_mode(zhp);
2287
2288         /*
2289          * Check to see if this property applies to our object
2290          */
2291         if (!zfs_prop_valid_for_type(prop, zhp->zfs_type))
2292                 return (-1);
2293
2294         if (received && zfs_prop_readonly(prop))
2295                 return (-1);
2296
2297         if (src)
2298                 *src = ZPROP_SRC_NONE;
2299
2300         switch (prop) {
2301         case ZFS_PROP_CREATION:
2302                 /*
2303                  * 'creation' is a time_t stored in the statistics.  We convert
2304                  * this into a string unless 'literal' is specified.
2305                  */
2306                 {
2307                         val = getprop_uint64(zhp, prop, &source);
2308                         time_t time = (time_t)val;
2309                         struct tm t;
2310
2311                         if (literal ||
2312                             localtime_r(&time, &t) == NULL ||
2313                             strftime(propbuf, proplen, "%a %b %e %k:%M %Y",
2314                             &t) == 0)
2315                                 (void) snprintf(propbuf, proplen, "%llu", val);
2316                 }
2317                 break;
2318
2319         case ZFS_PROP_MOUNTPOINT:
2320                 /*
2321                  * Getting the precise mountpoint can be tricky.
2322                  *
2323                  *  - for 'none' or 'legacy', return those values.
2324                  *  - for inherited mountpoints, we want to take everything
2325                  *    after our ancestor and append it to the inherited value.
2326                  *
2327                  * If the pool has an alternate root, we want to prepend that
2328                  * root to any values we return.
2329                  */
2330
2331                 str = getprop_string(zhp, prop, &source);
2332
2333                 if (str[0] == '/') {
2334                         char buf[MAXPATHLEN];
2335                         char *root = buf;
2336                         const char *relpath;
2337
2338                         /*
2339                          * If we inherit the mountpoint, even from a dataset
2340                          * with a received value, the source will be the path of
2341                          * the dataset we inherit from. If source is
2342                          * ZPROP_SOURCE_VAL_RECVD, the received value is not
2343                          * inherited.
2344                          */
2345                         if (strcmp(source, ZPROP_SOURCE_VAL_RECVD) == 0) {
2346                                 relpath = "";
2347                         } else {
2348                                 relpath = zhp->zfs_name + strlen(source);
2349                                 if (relpath[0] == '/')
2350                                         relpath++;
2351                         }
2352
2353                         if ((zpool_get_prop(zhp->zpool_hdl,
2354                             ZPOOL_PROP_ALTROOT, buf, MAXPATHLEN, NULL,
2355                             B_FALSE)) || (strcmp(root, "-") == 0))
2356                                 root[0] = '\0';
2357                         /*
2358                          * Special case an alternate root of '/'. This will
2359                          * avoid having multiple leading slashes in the
2360                          * mountpoint path.
2361                          */
2362                         if (strcmp(root, "/") == 0)
2363                                 root++;
2364
2365                         /*
2366                          * If the mountpoint is '/' then skip over this
2367                          * if we are obtaining either an alternate root or
2368                          * an inherited mountpoint.
2369                          */
2370                         if (str[1] == '\0' && (root[0] != '\0' ||
2371                             relpath[0] != '\0'))
2372                                 str++;
2373
2374                         if (relpath[0] == '\0')
2375                                 (void) snprintf(propbuf, proplen, "%s%s",
2376                                     root, str);
2377                         else
2378                                 (void) snprintf(propbuf, proplen, "%s%s%s%s",
2379                                     root, str, relpath[0] == '@' ? "" : "/",
2380                                     relpath);
2381                 } else {
2382                         /* 'legacy' or 'none' */
2383                         (void) strlcpy(propbuf, str, proplen);
2384                 }
2385
2386                 break;
2387
2388         case ZFS_PROP_ORIGIN:
2389                 str = getprop_string(zhp, prop, &source);
2390                 if (str == NULL)
2391                         return (-1);
2392                 (void) strlcpy(propbuf, str, proplen);
2393                 break;
2394
2395         case ZFS_PROP_CLONES:
2396                 if (get_clones_string(zhp, propbuf, proplen) != 0)
2397                         return (-1);
2398                 break;
2399
2400         case ZFS_PROP_QUOTA:
2401         case ZFS_PROP_REFQUOTA:
2402         case ZFS_PROP_RESERVATION:
2403         case ZFS_PROP_REFRESERVATION:
2404
2405                 if (get_numeric_property(zhp, prop, src, &source, &val) != 0)
2406                         return (-1);
2407
2408                 /*
2409                  * If quota or reservation is 0, we translate this into 'none'
2410                  * (unless literal is set), and indicate that it's the default
2411                  * value.  Otherwise, we print the number nicely and indicate
2412                  * that its set locally.
2413                  */
2414                 if (val == 0) {
2415                         if (literal)
2416                                 (void) strlcpy(propbuf, "0", proplen);
2417                         else
2418                                 (void) strlcpy(propbuf, "none", proplen);
2419                 } else {
2420                         if (literal)
2421                                 (void) snprintf(propbuf, proplen, "%llu",
2422                                     (u_longlong_t)val);
2423                         else
2424                                 zfs_nicenum(val, propbuf, proplen);
2425                 }
2426                 break;
2427
2428         case ZFS_PROP_FILESYSTEM_LIMIT:
2429         case ZFS_PROP_SNAPSHOT_LIMIT:
2430         case ZFS_PROP_FILESYSTEM_COUNT:
2431         case ZFS_PROP_SNAPSHOT_COUNT:
2432
2433                 if (get_numeric_property(zhp, prop, src, &source, &val) != 0)
2434                         return (-1);
2435
2436                 /*
2437                  * If limit is UINT64_MAX, we translate this into 'none' (unless
2438                  * literal is set), and indicate that it's the default value.
2439                  * Otherwise, we print the number nicely and indicate that it's
2440                  * set locally.
2441                  */
2442                 if (literal) {
2443                         (void) snprintf(propbuf, proplen, "%llu",
2444                             (u_longlong_t)val);
2445                 } else if (val == UINT64_MAX) {
2446                         (void) strlcpy(propbuf, "none", proplen);
2447                 } else {
2448                         zfs_nicenum(val, propbuf, proplen);
2449                 }
2450                 break;
2451
2452         case ZFS_PROP_REFRATIO:
2453         case ZFS_PROP_COMPRESSRATIO:
2454                 if (get_numeric_property(zhp, prop, src, &source, &val) != 0)
2455                         return (-1);
2456                 (void) snprintf(propbuf, proplen, "%llu.%02llux",
2457                     (u_longlong_t)(val / 100),
2458                     (u_longlong_t)(val % 100));
2459                 break;
2460
2461         case ZFS_PROP_TYPE:
2462                 switch (zhp->zfs_type) {
2463                 case ZFS_TYPE_FILESYSTEM:
2464                         str = "filesystem";
2465                         break;
2466                 case ZFS_TYPE_VOLUME:
2467                         str = "volume";
2468                         break;
2469                 case ZFS_TYPE_SNAPSHOT:
2470                         str = "snapshot";
2471                         break;
2472                 case ZFS_TYPE_BOOKMARK:
2473                         str = "bookmark";
2474                         break;
2475                 default:
2476                         abort();
2477                 }
2478                 (void) snprintf(propbuf, proplen, "%s", str);
2479                 break;
2480
2481         case ZFS_PROP_MOUNTED:
2482                 /*
2483                  * The 'mounted' property is a pseudo-property that described
2484                  * whether the filesystem is currently mounted.  Even though
2485                  * it's a boolean value, the typical values of "on" and "off"
2486                  * don't make sense, so we translate to "yes" and "no".
2487                  */
2488                 if (get_numeric_property(zhp, ZFS_PROP_MOUNTED,
2489                     src, &source, &val) != 0)
2490                         return (-1);
2491                 if (val)
2492                         (void) strlcpy(propbuf, "yes", proplen);
2493                 else
2494                         (void) strlcpy(propbuf, "no", proplen);
2495                 break;
2496
2497         case ZFS_PROP_NAME:
2498                 /*
2499                  * The 'name' property is a pseudo-property derived from the
2500                  * dataset name.  It is presented as a real property to simplify
2501                  * consumers.
2502                  */
2503                 (void) strlcpy(propbuf, zhp->zfs_name, proplen);
2504                 break;
2505
2506         case ZFS_PROP_MLSLABEL:
2507                 {
2508 #ifdef illumos
2509                         m_label_t *new_sl = NULL;
2510                         char *ascii = NULL;     /* human readable label */
2511
2512                         (void) strlcpy(propbuf,
2513                             getprop_string(zhp, prop, &source), proplen);
2514
2515                         if (literal || (strcasecmp(propbuf,
2516                             ZFS_MLSLABEL_DEFAULT) == 0))
2517                                 break;
2518
2519                         /*
2520                          * Try to translate the internal hex string to
2521                          * human-readable output.  If there are any
2522                          * problems just use the hex string.
2523                          */
2524
2525                         if (str_to_label(propbuf, &new_sl, MAC_LABEL,
2526                             L_NO_CORRECTION, NULL) == -1) {
2527                                 m_label_free(new_sl);
2528                                 break;
2529                         }
2530
2531                         if (label_to_str(new_sl, &ascii, M_LABEL,
2532                             DEF_NAMES) != 0) {
2533                                 if (ascii)
2534                                         free(ascii);
2535                                 m_label_free(new_sl);
2536                                 break;
2537                         }
2538                         m_label_free(new_sl);
2539
2540                         (void) strlcpy(propbuf, ascii, proplen);
2541                         free(ascii);
2542 #else   /* !illumos */
2543                         propbuf[0] = '\0';
2544 #endif  /* illumos */
2545                 }
2546                 break;
2547
2548         case ZFS_PROP_GUID:
2549                 /*
2550                  * GUIDs are stored as numbers, but they are identifiers.
2551                  * We don't want them to be pretty printed, because pretty
2552                  * printing mangles the ID into a truncated and useless value.
2553                  */
2554                 if (get_numeric_property(zhp, prop, src, &source, &val) != 0)
2555                         return (-1);
2556                 (void) snprintf(propbuf, proplen, "%llu", (u_longlong_t)val);
2557                 break;
2558
2559         default:
2560                 switch (zfs_prop_get_type(prop)) {
2561                 case PROP_TYPE_NUMBER:
2562                         if (get_numeric_property(zhp, prop, src,
2563                             &source, &val) != 0)
2564                                 return (-1);
2565                         if (literal)
2566                                 (void) snprintf(propbuf, proplen, "%llu",
2567                                     (u_longlong_t)val);
2568                         else
2569                                 zfs_nicenum(val, propbuf, proplen);
2570                         break;
2571
2572                 case PROP_TYPE_STRING:
2573                         str = getprop_string(zhp, prop, &source);
2574                         if (str == NULL)
2575                                 return (-1);
2576                         (void) strlcpy(propbuf, str, proplen);
2577                         break;
2578
2579                 case PROP_TYPE_INDEX:
2580                         if (get_numeric_property(zhp, prop, src,
2581                             &source, &val) != 0)
2582                                 return (-1);
2583                         if (zfs_prop_index_to_string(prop, val, &strval) != 0)
2584                                 return (-1);
2585                         (void) strlcpy(propbuf, strval, proplen);
2586                         break;
2587
2588                 default:
2589                         abort();
2590                 }
2591         }
2592
2593         get_source(zhp, src, source, statbuf, statlen);
2594
2595         return (0);
2596 }
2597
2598 /*
2599  * Utility function to get the given numeric property.  Does no validation that
2600  * the given property is the appropriate type; should only be used with
2601  * hard-coded property types.
2602  */
2603 uint64_t
2604 zfs_prop_get_int(zfs_handle_t *zhp, zfs_prop_t prop)
2605 {
2606         char *source;
2607         uint64_t val;
2608
2609         (void) get_numeric_property(zhp, prop, NULL, &source, &val);
2610
2611         return (val);
2612 }
2613
2614 int
2615 zfs_prop_set_int(zfs_handle_t *zhp, zfs_prop_t prop, uint64_t val)
2616 {
2617         char buf[64];
2618
2619         (void) snprintf(buf, sizeof (buf), "%llu", (longlong_t)val);
2620         return (zfs_prop_set(zhp, zfs_prop_to_name(prop), buf));
2621 }
2622
2623 /*
2624  * Similar to zfs_prop_get(), but returns the value as an integer.
2625  */
2626 int
2627 zfs_prop_get_numeric(zfs_handle_t *zhp, zfs_prop_t prop, uint64_t *value,
2628     zprop_source_t *src, char *statbuf, size_t statlen)
2629 {
2630         char *source;
2631
2632         /*
2633          * Check to see if this property applies to our object
2634          */
2635         if (!zfs_prop_valid_for_type(prop, zhp->zfs_type)) {
2636                 return (zfs_error_fmt(zhp->zfs_hdl, EZFS_PROPTYPE,
2637                     dgettext(TEXT_DOMAIN, "cannot get property '%s'"),
2638                     zfs_prop_to_name(prop)));
2639         }
2640
2641         if (src)
2642                 *src = ZPROP_SRC_NONE;
2643
2644         if (get_numeric_property(zhp, prop, src, &source, value) != 0)
2645                 return (-1);
2646
2647         get_source(zhp, src, source, statbuf, statlen);
2648
2649         return (0);
2650 }
2651
2652 static int
2653 idmap_id_to_numeric_domain_rid(uid_t id, boolean_t isuser,
2654     char **domainp, idmap_rid_t *ridp)
2655 {
2656 #ifdef illumos
2657         idmap_get_handle_t *get_hdl = NULL;
2658         idmap_stat status;
2659         int err = EINVAL;
2660
2661         if (idmap_get_create(&get_hdl) != IDMAP_SUCCESS)
2662                 goto out;
2663
2664         if (isuser) {
2665                 err = idmap_get_sidbyuid(get_hdl, id,
2666                     IDMAP_REQ_FLG_USE_CACHE, domainp, ridp, &status);
2667         } else {
2668                 err = idmap_get_sidbygid(get_hdl, id,
2669                     IDMAP_REQ_FLG_USE_CACHE, domainp, ridp, &status);
2670         }
2671         if (err == IDMAP_SUCCESS &&
2672             idmap_get_mappings(get_hdl) == IDMAP_SUCCESS &&
2673             status == IDMAP_SUCCESS)
2674                 err = 0;
2675         else
2676                 err = EINVAL;
2677 out:
2678         if (get_hdl)
2679                 idmap_get_destroy(get_hdl);
2680         return (err);
2681 #else   /* !illumos */
2682         assert(!"invalid code path");
2683         return (EINVAL); // silence compiler warning
2684 #endif  /* illumos */
2685 }
2686
2687 /*
2688  * convert the propname into parameters needed by kernel
2689  * Eg: userquota@ahrens -> ZFS_PROP_USERQUOTA, "", 126829
2690  * Eg: userused@matt@domain -> ZFS_PROP_USERUSED, "S-1-123-456", 789
2691  */
2692 static int
2693 userquota_propname_decode(const char *propname, boolean_t zoned,
2694     zfs_userquota_prop_t *typep, char *domain, int domainlen, uint64_t *ridp)
2695 {
2696         zfs_userquota_prop_t type;
2697         char *cp, *end;
2698         char *numericsid = NULL;
2699         boolean_t isuser;
2700
2701         domain[0] = '\0';
2702         *ridp = 0;
2703         /* Figure out the property type ({user|group}{quota|space}) */
2704         for (type = 0; type < ZFS_NUM_USERQUOTA_PROPS; type++) {
2705                 if (strncmp(propname, zfs_userquota_prop_prefixes[type],
2706                     strlen(zfs_userquota_prop_prefixes[type])) == 0)
2707                         break;
2708         }
2709         if (type == ZFS_NUM_USERQUOTA_PROPS)
2710                 return (EINVAL);
2711         *typep = type;
2712
2713         isuser = (type == ZFS_PROP_USERQUOTA ||
2714             type == ZFS_PROP_USERUSED);
2715
2716         cp = strchr(propname, '@') + 1;
2717
2718         if (strchr(cp, '@')) {
2719 #ifdef illumos
2720                 /*
2721                  * It's a SID name (eg "user@domain") that needs to be
2722                  * turned into S-1-domainID-RID.
2723                  */
2724                 int flag = 0;
2725                 idmap_stat stat, map_stat;
2726                 uid_t pid;
2727                 idmap_rid_t rid;
2728                 idmap_get_handle_t *gh = NULL;
2729
2730                 stat = idmap_get_create(&gh);
2731                 if (stat != IDMAP_SUCCESS) {
2732                         idmap_get_destroy(gh);
2733                         return (ENOMEM);
2734                 }
2735                 if (zoned && getzoneid() == GLOBAL_ZONEID)
2736                         return (ENOENT);
2737                 if (isuser) {
2738                         stat = idmap_getuidbywinname(cp, NULL, flag, &pid);
2739                         if (stat < 0)
2740                                 return (ENOENT);
2741                         stat = idmap_get_sidbyuid(gh, pid, flag, &numericsid,
2742                             &rid, &map_stat);
2743                 } else {
2744                         stat = idmap_getgidbywinname(cp, NULL, flag, &pid);
2745                         if (stat < 0)
2746                                 return (ENOENT);
2747                         stat = idmap_get_sidbygid(gh, pid, flag, &numericsid,
2748                             &rid, &map_stat);
2749                 }
2750                 if (stat < 0) {
2751                         idmap_get_destroy(gh);
2752                         return (ENOENT);
2753                 }
2754                 stat = idmap_get_mappings(gh);
2755                 idmap_get_destroy(gh);
2756
2757                 if (stat < 0) {
2758                         return (ENOENT);
2759                 }
2760                 if (numericsid == NULL)
2761                         return (ENOENT);
2762                 cp = numericsid;
2763                 *ridp = rid;
2764                 /* will be further decoded below */
2765 #else   /* !illumos */
2766                 return (ENOENT);
2767 #endif  /* illumos */
2768         }
2769
2770         if (strncmp(cp, "S-1-", 4) == 0) {
2771                 /* It's a numeric SID (eg "S-1-234-567-89") */
2772                 (void) strlcpy(domain, cp, domainlen);
2773                 errno = 0;
2774                 if (*ridp == 0) {
2775                         cp = strrchr(domain, '-');
2776                         *cp = '\0';
2777                         cp++;
2778                         *ridp = strtoull(cp, &end, 10);
2779                 } else {
2780                         end = "";
2781                 }
2782                 if (numericsid) {
2783                         free(numericsid);
2784                         numericsid = NULL;
2785                 }
2786                 if (errno != 0 || *end != '\0')
2787                         return (EINVAL);
2788         } else if (!isdigit(*cp)) {
2789                 /*
2790                  * It's a user/group name (eg "user") that needs to be
2791                  * turned into a uid/gid
2792                  */
2793                 if (zoned && getzoneid() == GLOBAL_ZONEID)
2794                         return (ENOENT);
2795                 if (isuser) {
2796                         struct passwd *pw;
2797                         pw = getpwnam(cp);
2798                         if (pw == NULL)
2799                                 return (ENOENT);
2800                         *ridp = pw->pw_uid;
2801                 } else {
2802                         struct group *gr;
2803                         gr = getgrnam(cp);
2804                         if (gr == NULL)
2805                                 return (ENOENT);
2806                         *ridp = gr->gr_gid;
2807                 }
2808         } else {
2809                 /* It's a user/group ID (eg "12345"). */
2810                 uid_t id = strtoul(cp, &end, 10);
2811                 idmap_rid_t rid;
2812                 char *mapdomain;
2813
2814                 if (*end != '\0')
2815                         return (EINVAL);
2816                 if (id > MAXUID) {
2817                         /* It's an ephemeral ID. */
2818                         if (idmap_id_to_numeric_domain_rid(id, isuser,
2819                             &mapdomain, &rid) != 0)
2820                                 return (ENOENT);
2821                         (void) strlcpy(domain, mapdomain, domainlen);
2822                         *ridp = rid;
2823                 } else {
2824                         *ridp = id;
2825                 }
2826         }
2827
2828         ASSERT3P(numericsid, ==, NULL);
2829         return (0);
2830 }
2831
2832 static int
2833 zfs_prop_get_userquota_common(zfs_handle_t *zhp, const char *propname,
2834     uint64_t *propvalue, zfs_userquota_prop_t *typep)
2835 {
2836         int err;
2837         zfs_cmd_t zc = { 0 };
2838
2839         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
2840
2841         err = userquota_propname_decode(propname,
2842             zfs_prop_get_int(zhp, ZFS_PROP_ZONED),
2843             typep, zc.zc_value, sizeof (zc.zc_value), &zc.zc_guid);
2844         zc.zc_objset_type = *typep;
2845         if (err)
2846                 return (err);
2847
2848         err = ioctl(zhp->zfs_hdl->libzfs_fd, ZFS_IOC_USERSPACE_ONE, &zc);
2849         if (err)
2850                 return (err);
2851
2852         *propvalue = zc.zc_cookie;
2853         return (0);
2854 }
2855
2856 int
2857 zfs_prop_get_userquota_int(zfs_handle_t *zhp, const char *propname,
2858     uint64_t *propvalue)
2859 {
2860         zfs_userquota_prop_t type;
2861
2862         return (zfs_prop_get_userquota_common(zhp, propname, propvalue,
2863             &type));
2864 }
2865
2866 int
2867 zfs_prop_get_userquota(zfs_handle_t *zhp, const char *propname,
2868     char *propbuf, int proplen, boolean_t literal)
2869 {
2870         int err;
2871         uint64_t propvalue;
2872         zfs_userquota_prop_t type;
2873
2874         err = zfs_prop_get_userquota_common(zhp, propname, &propvalue,
2875             &type);
2876
2877         if (err)
2878                 return (err);
2879
2880         if (literal) {
2881                 (void) snprintf(propbuf, proplen, "%llu", propvalue);
2882         } else if (propvalue == 0 &&
2883             (type == ZFS_PROP_USERQUOTA || type == ZFS_PROP_GROUPQUOTA)) {
2884                 (void) strlcpy(propbuf, "none", proplen);
2885         } else {
2886                 zfs_nicenum(propvalue, propbuf, proplen);
2887         }
2888         return (0);
2889 }
2890
2891 int
2892 zfs_prop_get_written_int(zfs_handle_t *zhp, const char *propname,
2893     uint64_t *propvalue)
2894 {
2895         int err;
2896         zfs_cmd_t zc = { 0 };
2897         const char *snapname;
2898
2899         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
2900
2901         snapname = strchr(propname, '@') + 1;
2902         if (strchr(snapname, '@')) {
2903                 (void) strlcpy(zc.zc_value, snapname, sizeof (zc.zc_value));
2904         } else {
2905                 /* snapname is the short name, append it to zhp's fsname */
2906                 char *cp;
2907
2908                 (void) strlcpy(zc.zc_value, zhp->zfs_name,
2909                     sizeof (zc.zc_value));
2910                 cp = strchr(zc.zc_value, '@');
2911                 if (cp != NULL)
2912                         *cp = '\0';
2913                 (void) strlcat(zc.zc_value, "@", sizeof (zc.zc_value));
2914                 (void) strlcat(zc.zc_value, snapname, sizeof (zc.zc_value));
2915         }
2916
2917         err = ioctl(zhp->zfs_hdl->libzfs_fd, ZFS_IOC_SPACE_WRITTEN, &zc);
2918         if (err)
2919                 return (err);
2920
2921         *propvalue = zc.zc_cookie;
2922         return (0);
2923 }
2924
2925 int
2926 zfs_prop_get_written(zfs_handle_t *zhp, const char *propname,
2927     char *propbuf, int proplen, boolean_t literal)
2928 {
2929         int err;
2930         uint64_t propvalue;
2931
2932         err = zfs_prop_get_written_int(zhp, propname, &propvalue);
2933
2934         if (err)
2935                 return (err);
2936
2937         if (literal) {
2938                 (void) snprintf(propbuf, proplen, "%llu", propvalue);
2939         } else {
2940                 zfs_nicenum(propvalue, propbuf, proplen);
2941         }
2942         return (0);
2943 }
2944
2945 /*
2946  * Returns the name of the given zfs handle.
2947  */
2948 const char *
2949 zfs_get_name(const zfs_handle_t *zhp)
2950 {
2951         return (zhp->zfs_name);
2952 }
2953
2954 /*
2955  * Returns the type of the given zfs handle.
2956  */
2957 zfs_type_t
2958 zfs_get_type(const zfs_handle_t *zhp)
2959 {
2960         return (zhp->zfs_type);
2961 }
2962
2963 /*
2964  * Is one dataset name a child dataset of another?
2965  *
2966  * Needs to handle these cases:
2967  * Dataset 1    "a/foo"         "a/foo"         "a/foo"         "a/foo"
2968  * Dataset 2    "a/fo"          "a/foobar"      "a/bar/baz"     "a/foo/bar"
2969  * Descendant?  No.             No.             No.             Yes.
2970  */
2971 static boolean_t
2972 is_descendant(const char *ds1, const char *ds2)
2973 {
2974         size_t d1len = strlen(ds1);
2975
2976         /* ds2 can't be a descendant if it's smaller */
2977         if (strlen(ds2) < d1len)
2978                 return (B_FALSE);
2979
2980         /* otherwise, compare strings and verify that there's a '/' char */
2981         return (ds2[d1len] == '/' && (strncmp(ds1, ds2, d1len) == 0));
2982 }
2983
2984 /*
2985  * Given a complete name, return just the portion that refers to the parent.
2986  * Will return -1 if there is no parent (path is just the name of the
2987  * pool).
2988  */
2989 static int
2990 parent_name(const char *path, char *buf, size_t buflen)
2991 {
2992         char *slashp;
2993
2994         (void) strlcpy(buf, path, buflen);
2995
2996         if ((slashp = strrchr(buf, '/')) == NULL)
2997                 return (-1);
2998         *slashp = '\0';
2999
3000         return (0);
3001 }
3002
3003 /*
3004  * If accept_ancestor is false, then check to make sure that the given path has
3005  * a parent, and that it exists.  If accept_ancestor is true, then find the
3006  * closest existing ancestor for the given path.  In prefixlen return the
3007  * length of already existing prefix of the given path.  We also fetch the
3008  * 'zoned' property, which is used to validate property settings when creating
3009  * new datasets.
3010  */
3011 static int
3012 check_parents(libzfs_handle_t *hdl, const char *path, uint64_t *zoned,
3013     boolean_t accept_ancestor, int *prefixlen)
3014 {
3015         zfs_cmd_t zc = { 0 };
3016         char parent[ZFS_MAXNAMELEN];
3017         char *slash;
3018         zfs_handle_t *zhp;
3019         char errbuf[1024];
3020         uint64_t is_zoned;
3021
3022         (void) snprintf(errbuf, sizeof (errbuf),
3023             dgettext(TEXT_DOMAIN, "cannot create '%s'"), path);
3024
3025         /* get parent, and check to see if this is just a pool */
3026         if (parent_name(path, parent, sizeof (parent)) != 0) {
3027                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3028                     "missing dataset name"));
3029                 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3030         }
3031
3032         /* check to see if the pool exists */
3033         if ((slash = strchr(parent, '/')) == NULL)
3034                 slash = parent + strlen(parent);
3035         (void) strncpy(zc.zc_name, parent, slash - parent);
3036         zc.zc_name[slash - parent] = '\0';
3037         if (ioctl(hdl->libzfs_fd, ZFS_IOC_OBJSET_STATS, &zc) != 0 &&
3038             errno == ENOENT) {
3039                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3040                     "no such pool '%s'"), zc.zc_name);
3041                 return (zfs_error(hdl, EZFS_NOENT, errbuf));
3042         }
3043
3044         /* check to see if the parent dataset exists */
3045         while ((zhp = make_dataset_handle(hdl, parent)) == NULL) {
3046                 if (errno == ENOENT && accept_ancestor) {
3047                         /*
3048                          * Go deeper to find an ancestor, give up on top level.
3049                          */
3050                         if (parent_name(parent, parent, sizeof (parent)) != 0) {
3051                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3052                                     "no such pool '%s'"), zc.zc_name);
3053                                 return (zfs_error(hdl, EZFS_NOENT, errbuf));
3054                         }
3055                 } else if (errno == ENOENT) {
3056                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3057                             "parent does not exist"));
3058                         return (zfs_error(hdl, EZFS_NOENT, errbuf));
3059                 } else
3060                         return (zfs_standard_error(hdl, errno, errbuf));
3061         }
3062
3063         is_zoned = zfs_prop_get_int(zhp, ZFS_PROP_ZONED);
3064         if (zoned != NULL)
3065                 *zoned = is_zoned;
3066
3067         /* we are in a non-global zone, but parent is in the global zone */
3068         if (getzoneid() != GLOBAL_ZONEID && !is_zoned) {
3069                 (void) zfs_standard_error(hdl, EPERM, errbuf);
3070                 zfs_close(zhp);
3071                 return (-1);
3072         }
3073
3074         /* make sure parent is a filesystem */
3075         if (zfs_get_type(zhp) != ZFS_TYPE_FILESYSTEM) {
3076                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3077                     "parent is not a filesystem"));
3078                 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf);
3079                 zfs_close(zhp);
3080                 return (-1);
3081         }
3082
3083         zfs_close(zhp);
3084         if (prefixlen != NULL)
3085                 *prefixlen = strlen(parent);
3086         return (0);
3087 }
3088
3089 /*
3090  * Finds whether the dataset of the given type(s) exists.
3091  */
3092 boolean_t
3093 zfs_dataset_exists(libzfs_handle_t *hdl, const char *path, zfs_type_t types)
3094 {
3095         zfs_handle_t *zhp;
3096
3097         if (!zfs_validate_name(hdl, path, types, B_FALSE))
3098                 return (B_FALSE);
3099
3100         /*
3101          * Try to get stats for the dataset, which will tell us if it exists.
3102          */
3103         if ((zhp = make_dataset_handle(hdl, path)) != NULL) {
3104                 int ds_type = zhp->zfs_type;
3105
3106                 zfs_close(zhp);
3107                 if (types & ds_type)
3108                         return (B_TRUE);
3109         }
3110         return (B_FALSE);
3111 }
3112
3113 /*
3114  * Given a path to 'target', create all the ancestors between
3115  * the prefixlen portion of the path, and the target itself.
3116  * Fail if the initial prefixlen-ancestor does not already exist.
3117  */
3118 int
3119 create_parents(libzfs_handle_t *hdl, char *target, int prefixlen)
3120 {
3121         zfs_handle_t *h;
3122         char *cp;
3123         const char *opname;
3124
3125         /* make sure prefix exists */
3126         cp = target + prefixlen;
3127         if (*cp != '/') {
3128                 assert(strchr(cp, '/') == NULL);
3129                 h = zfs_open(hdl, target, ZFS_TYPE_FILESYSTEM);
3130         } else {
3131                 *cp = '\0';
3132                 h = zfs_open(hdl, target, ZFS_TYPE_FILESYSTEM);
3133                 *cp = '/';
3134         }
3135         if (h == NULL)
3136                 return (-1);
3137         zfs_close(h);
3138
3139         /*
3140          * Attempt to create, mount, and share any ancestor filesystems,
3141          * up to the prefixlen-long one.
3142          */
3143         for (cp = target + prefixlen + 1;
3144             cp = strchr(cp, '/'); *cp = '/', cp++) {
3145
3146                 *cp = '\0';
3147
3148                 h = make_dataset_handle(hdl, target);
3149                 if (h) {
3150                         /* it already exists, nothing to do here */
3151                         zfs_close(h);
3152                         continue;
3153                 }
3154
3155                 if (zfs_create(hdl, target, ZFS_TYPE_FILESYSTEM,
3156                     NULL) != 0) {
3157                         opname = dgettext(TEXT_DOMAIN, "create");
3158                         goto ancestorerr;
3159                 }
3160
3161                 h = zfs_open(hdl, target, ZFS_TYPE_FILESYSTEM);
3162                 if (h == NULL) {
3163                         opname = dgettext(TEXT_DOMAIN, "open");
3164                         goto ancestorerr;
3165                 }
3166
3167                 if (zfs_mount(h, NULL, 0) != 0) {
3168                         opname = dgettext(TEXT_DOMAIN, "mount");
3169                         goto ancestorerr;
3170                 }
3171
3172                 if (zfs_share(h) != 0) {
3173                         opname = dgettext(TEXT_DOMAIN, "share");
3174                         goto ancestorerr;
3175                 }
3176
3177                 zfs_close(h);
3178         }
3179
3180         return (0);
3181
3182 ancestorerr:
3183         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3184             "failed to %s ancestor '%s'"), opname, target);
3185         return (-1);
3186 }
3187
3188 /*
3189  * Creates non-existing ancestors of the given path.
3190  */
3191 int
3192 zfs_create_ancestors(libzfs_handle_t *hdl, const char *path)
3193 {
3194         int prefix;
3195         char *path_copy;
3196         int rc;
3197
3198         if (check_parents(hdl, path, NULL, B_TRUE, &prefix) != 0)
3199                 return (-1);
3200
3201         if ((path_copy = strdup(path)) != NULL) {
3202                 rc = create_parents(hdl, path_copy, prefix);
3203                 free(path_copy);
3204         }
3205         if (path_copy == NULL || rc != 0)
3206                 return (-1);
3207
3208         return (0);
3209 }
3210
3211 /*
3212  * Create a new filesystem or volume.
3213  */
3214 int
3215 zfs_create(libzfs_handle_t *hdl, const char *path, zfs_type_t type,
3216     nvlist_t *props)
3217 {
3218         int ret;
3219         uint64_t size = 0;
3220         uint64_t blocksize = zfs_prop_default_numeric(ZFS_PROP_VOLBLOCKSIZE);
3221         char errbuf[1024];
3222         uint64_t zoned;
3223         dmu_objset_type_t ost;
3224
3225         (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3226             "cannot create '%s'"), path);
3227
3228         /* validate the path, taking care to note the extended error message */
3229         if (!zfs_validate_name(hdl, path, type, B_TRUE))
3230                 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3231
3232         /* validate parents exist */
3233         if (check_parents(hdl, path, &zoned, B_FALSE, NULL) != 0)
3234                 return (-1);
3235
3236         /*
3237          * The failure modes when creating a dataset of a different type over
3238          * one that already exists is a little strange.  In particular, if you
3239          * try to create a dataset on top of an existing dataset, the ioctl()
3240          * will return ENOENT, not EEXIST.  To prevent this from happening, we
3241          * first try to see if the dataset exists.
3242          */
3243         if (zfs_dataset_exists(hdl, path, ZFS_TYPE_DATASET)) {
3244                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3245                     "dataset already exists"));
3246                 return (zfs_error(hdl, EZFS_EXISTS, errbuf));
3247         }
3248
3249         if (type == ZFS_TYPE_VOLUME)
3250                 ost = DMU_OST_ZVOL;
3251         else
3252                 ost = DMU_OST_ZFS;
3253
3254         /* open zpool handle for prop validation */
3255         char pool_path[MAXNAMELEN];
3256         (void) strlcpy(pool_path, path, sizeof (pool_path));
3257
3258         /* truncate pool_path at first slash */
3259         char *p = strchr(pool_path, '/');
3260         if (p != NULL)
3261                 *p = '\0';
3262
3263         zpool_handle_t *zpool_handle = zpool_open(hdl, pool_path);
3264
3265         if (props && (props = zfs_valid_proplist(hdl, type, props,
3266             zoned, NULL, zpool_handle, errbuf)) == 0) {
3267                 zpool_close(zpool_handle);
3268                 return (-1);
3269         }
3270         zpool_close(zpool_handle);
3271
3272         if (type == ZFS_TYPE_VOLUME) {
3273                 /*
3274                  * If we are creating a volume, the size and block size must
3275                  * satisfy a few restraints.  First, the blocksize must be a
3276                  * valid block size between SPA_{MIN,MAX}BLOCKSIZE.  Second, the
3277                  * volsize must be a multiple of the block size, and cannot be
3278                  * zero.
3279                  */
3280                 if (props == NULL || nvlist_lookup_uint64(props,
3281                     zfs_prop_to_name(ZFS_PROP_VOLSIZE), &size) != 0) {
3282                         nvlist_free(props);
3283                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3284                             "missing volume size"));
3285                         return (zfs_error(hdl, EZFS_BADPROP, errbuf));
3286                 }
3287
3288                 if ((ret = nvlist_lookup_uint64(props,
3289                     zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE),
3290                     &blocksize)) != 0) {
3291                         if (ret == ENOENT) {
3292                                 blocksize = zfs_prop_default_numeric(
3293                                     ZFS_PROP_VOLBLOCKSIZE);
3294                         } else {
3295                                 nvlist_free(props);
3296                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3297                                     "missing volume block size"));
3298                                 return (zfs_error(hdl, EZFS_BADPROP, errbuf));
3299                         }
3300                 }
3301
3302                 if (size == 0) {
3303                         nvlist_free(props);
3304                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3305                             "volume size cannot be zero"));
3306                         return (zfs_error(hdl, EZFS_BADPROP, errbuf));
3307                 }
3308
3309                 if (size % blocksize != 0) {
3310                         nvlist_free(props);
3311                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3312                             "volume size must be a multiple of volume block "
3313                             "size"));
3314                         return (zfs_error(hdl, EZFS_BADPROP, errbuf));
3315                 }
3316         }
3317
3318         /* create the dataset */
3319         ret = lzc_create(path, ost, props);
3320         nvlist_free(props);
3321
3322         /* check for failure */
3323         if (ret != 0) {
3324                 char parent[ZFS_MAXNAMELEN];
3325                 (void) parent_name(path, parent, sizeof (parent));
3326
3327                 switch (errno) {
3328                 case ENOENT:
3329                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3330                             "no such parent '%s'"), parent);
3331                         return (zfs_error(hdl, EZFS_NOENT, errbuf));
3332
3333                 case EINVAL:
3334                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3335                             "parent '%s' is not a filesystem"), parent);
3336                         return (zfs_error(hdl, EZFS_BADTYPE, errbuf));
3337
3338                 case ENOTSUP:
3339                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3340                             "pool must be upgraded to set this "
3341                             "property or value"));
3342                         return (zfs_error(hdl, EZFS_BADVERSION, errbuf));
3343 #ifdef _ILP32
3344                 case EOVERFLOW:
3345                         /*
3346                          * This platform can't address a volume this big.
3347                          */
3348                         if (type == ZFS_TYPE_VOLUME)
3349                                 return (zfs_error(hdl, EZFS_VOLTOOBIG,
3350                                     errbuf));
3351 #endif
3352                         /* FALLTHROUGH */
3353                 default:
3354                         return (zfs_standard_error(hdl, errno, errbuf));
3355                 }
3356         }
3357
3358         return (0);
3359 }
3360
3361 /*
3362  * Destroys the given dataset.  The caller must make sure that the filesystem
3363  * isn't mounted, and that there are no active dependents. If the file system
3364  * does not exist this function does nothing.
3365  */
3366 int
3367 zfs_destroy(zfs_handle_t *zhp, boolean_t defer)
3368 {
3369         zfs_cmd_t zc = { 0 };
3370
3371         if (zhp->zfs_type == ZFS_TYPE_BOOKMARK) {
3372                 nvlist_t *nv = fnvlist_alloc();
3373                 fnvlist_add_boolean(nv, zhp->zfs_name);
3374                 int error = lzc_destroy_bookmarks(nv, NULL);
3375                 fnvlist_free(nv);
3376                 if (error != 0) {
3377                         return (zfs_standard_error_fmt(zhp->zfs_hdl, errno,
3378                             dgettext(TEXT_DOMAIN, "cannot destroy '%s'"),
3379                             zhp->zfs_name));
3380                 }
3381                 return (0);
3382         }
3383
3384         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
3385
3386         if (ZFS_IS_VOLUME(zhp)) {
3387                 zc.zc_objset_type = DMU_OST_ZVOL;
3388         } else {
3389                 zc.zc_objset_type = DMU_OST_ZFS;
3390         }
3391
3392         zc.zc_defer_destroy = defer;
3393         if (zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_DESTROY, &zc) != 0 &&
3394             errno != ENOENT) {
3395                 return (zfs_standard_error_fmt(zhp->zfs_hdl, errno,
3396                     dgettext(TEXT_DOMAIN, "cannot destroy '%s'"),
3397                     zhp->zfs_name));
3398         }
3399
3400         remove_mountpoint(zhp);
3401
3402         return (0);
3403 }
3404
3405 struct destroydata {
3406         nvlist_t *nvl;
3407         const char *snapname;
3408 };
3409
3410 static int
3411 zfs_check_snap_cb(zfs_handle_t *zhp, void *arg)
3412 {
3413         struct destroydata *dd = arg;
3414         char name[ZFS_MAXNAMELEN];
3415         int rv = 0;
3416
3417         (void) snprintf(name, sizeof (name),
3418             "%s@%s", zhp->zfs_name, dd->snapname);
3419
3420         if (lzc_exists(name))
3421                 verify(nvlist_add_boolean(dd->nvl, name) == 0);
3422
3423         rv = zfs_iter_filesystems(zhp, zfs_check_snap_cb, dd);
3424         zfs_close(zhp);
3425         return (rv);
3426 }
3427
3428 /*
3429  * Destroys all snapshots with the given name in zhp & descendants.
3430  */
3431 int
3432 zfs_destroy_snaps(zfs_handle_t *zhp, char *snapname, boolean_t defer)
3433 {
3434         int ret;
3435         struct destroydata dd = { 0 };
3436
3437         dd.snapname = snapname;
3438         verify(nvlist_alloc(&dd.nvl, NV_UNIQUE_NAME, 0) == 0);
3439         (void) zfs_check_snap_cb(zfs_handle_dup(zhp), &dd);
3440
3441         if (nvlist_empty(dd.nvl)) {
3442                 ret = zfs_standard_error_fmt(zhp->zfs_hdl, ENOENT,
3443                     dgettext(TEXT_DOMAIN, "cannot destroy '%s@%s'"),
3444                     zhp->zfs_name, snapname);
3445         } else {
3446                 ret = zfs_destroy_snaps_nvl(zhp->zfs_hdl, dd.nvl, defer);
3447         }
3448         nvlist_free(dd.nvl);
3449         return (ret);
3450 }
3451
3452 /*
3453  * Destroys all the snapshots named in the nvlist.
3454  */
3455 int
3456 zfs_destroy_snaps_nvl(libzfs_handle_t *hdl, nvlist_t *snaps, boolean_t defer)
3457 {
3458         int ret;
3459         nvlist_t *errlist;
3460
3461         ret = lzc_destroy_snaps(snaps, defer, &errlist);
3462
3463         if (ret == 0)
3464                 return (0);
3465
3466         if (nvlist_empty(errlist)) {
3467                 char errbuf[1024];
3468                 (void) snprintf(errbuf, sizeof (errbuf),
3469                     dgettext(TEXT_DOMAIN, "cannot destroy snapshots"));
3470
3471                 ret = zfs_standard_error(hdl, ret, errbuf);
3472         }
3473         for (nvpair_t *pair = nvlist_next_nvpair(errlist, NULL);
3474             pair != NULL; pair = nvlist_next_nvpair(errlist, pair)) {
3475                 char errbuf[1024];
3476                 (void) snprintf(errbuf, sizeof (errbuf),
3477                     dgettext(TEXT_DOMAIN, "cannot destroy snapshot %s"),
3478                     nvpair_name(pair));
3479
3480                 switch (fnvpair_value_int32(pair)) {
3481                 case EEXIST:
3482                         zfs_error_aux(hdl,
3483                             dgettext(TEXT_DOMAIN, "snapshot is cloned"));
3484                         ret = zfs_error(hdl, EZFS_EXISTS, errbuf);
3485                         break;
3486                 default:
3487                         ret = zfs_standard_error(hdl, errno, errbuf);
3488                         break;
3489                 }
3490         }
3491
3492         return (ret);
3493 }
3494
3495 /*
3496  * Clones the given dataset.  The target must be of the same type as the source.
3497  */
3498 int
3499 zfs_clone(zfs_handle_t *zhp, const char *target, nvlist_t *props)
3500 {
3501         char parent[ZFS_MAXNAMELEN];
3502         int ret;
3503         char errbuf[1024];
3504         libzfs_handle_t *hdl = zhp->zfs_hdl;
3505         uint64_t zoned;
3506
3507         assert(zhp->zfs_type == ZFS_TYPE_SNAPSHOT);
3508
3509         (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3510             "cannot create '%s'"), target);
3511
3512         /* validate the target/clone name */
3513         if (!zfs_validate_name(hdl, target, ZFS_TYPE_FILESYSTEM, B_TRUE))
3514                 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3515
3516         /* validate parents exist */
3517         if (check_parents(hdl, target, &zoned, B_FALSE, NULL) != 0)
3518                 return (-1);
3519
3520         (void) parent_name(target, parent, sizeof (parent));
3521
3522         /* do the clone */
3523
3524         if (props) {
3525                 zfs_type_t type;
3526                 if (ZFS_IS_VOLUME(zhp)) {
3527                         type = ZFS_TYPE_VOLUME;
3528                 } else {
3529                         type = ZFS_TYPE_FILESYSTEM;
3530                 }
3531                 if ((props = zfs_valid_proplist(hdl, type, props, zoned,
3532                     zhp, zhp->zpool_hdl, errbuf)) == NULL)
3533                         return (-1);
3534         }
3535
3536         ret = lzc_clone(target, zhp->zfs_name, props);
3537         nvlist_free(props);
3538
3539         if (ret != 0) {
3540                 switch (errno) {
3541
3542                 case ENOENT:
3543                         /*
3544                          * The parent doesn't exist.  We should have caught this
3545                          * above, but there may a race condition that has since
3546                          * destroyed the parent.
3547                          *
3548                          * At this point, we don't know whether it's the source
3549                          * that doesn't exist anymore, or whether the target
3550                          * dataset doesn't exist.
3551                          */
3552                         zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN,
3553                             "no such parent '%s'"), parent);
3554                         return (zfs_error(zhp->zfs_hdl, EZFS_NOENT, errbuf));
3555
3556                 case EXDEV:
3557                         zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN,
3558                             "source and target pools differ"));
3559                         return (zfs_error(zhp->zfs_hdl, EZFS_CROSSTARGET,
3560                             errbuf));
3561
3562                 default:
3563                         return (zfs_standard_error(zhp->zfs_hdl, errno,
3564                             errbuf));
3565                 }
3566         }
3567
3568         return (ret);
3569 }
3570
3571 /*
3572  * Promotes the given clone fs to be the clone parent.
3573  */
3574 int
3575 zfs_promote(zfs_handle_t *zhp)
3576 {
3577         libzfs_handle_t *hdl = zhp->zfs_hdl;
3578         zfs_cmd_t zc = { 0 };
3579         char parent[MAXPATHLEN];
3580         int ret;
3581         char errbuf[1024];
3582
3583         (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3584             "cannot promote '%s'"), zhp->zfs_name);
3585
3586         if (zhp->zfs_type == ZFS_TYPE_SNAPSHOT) {
3587                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3588                     "snapshots can not be promoted"));
3589                 return (zfs_error(hdl, EZFS_BADTYPE, errbuf));
3590         }
3591
3592         (void) strlcpy(parent, zhp->zfs_dmustats.dds_origin, sizeof (parent));
3593         if (parent[0] == '\0') {
3594                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3595                     "not a cloned filesystem"));
3596                 return (zfs_error(hdl, EZFS_BADTYPE, errbuf));
3597         }
3598
3599         (void) strlcpy(zc.zc_value, zhp->zfs_dmustats.dds_origin,
3600             sizeof (zc.zc_value));
3601         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
3602         ret = zfs_ioctl(hdl, ZFS_IOC_PROMOTE, &zc);
3603
3604         if (ret != 0) {
3605                 int save_errno = errno;
3606
3607                 switch (save_errno) {
3608                 case EEXIST:
3609                         /* There is a conflicting snapshot name. */
3610                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3611                             "conflicting snapshot '%s' from parent '%s'"),
3612                             zc.zc_string, parent);
3613                         return (zfs_error(hdl, EZFS_EXISTS, errbuf));
3614
3615                 default:
3616                         return (zfs_standard_error(hdl, save_errno, errbuf));
3617                 }
3618         }
3619         return (ret);
3620 }
3621
3622 typedef struct snapdata {
3623         nvlist_t *sd_nvl;
3624         const char *sd_snapname;
3625 } snapdata_t;
3626
3627 static int
3628 zfs_snapshot_cb(zfs_handle_t *zhp, void *arg)
3629 {
3630         snapdata_t *sd = arg;
3631         char name[ZFS_MAXNAMELEN];
3632         int rv = 0;
3633
3634         if (zfs_prop_get_int(zhp, ZFS_PROP_INCONSISTENT) == 0) {
3635                 (void) snprintf(name, sizeof (name),
3636                     "%s@%s", zfs_get_name(zhp), sd->sd_snapname);
3637
3638                 fnvlist_add_boolean(sd->sd_nvl, name);
3639
3640                 rv = zfs_iter_filesystems(zhp, zfs_snapshot_cb, sd);
3641         }
3642         zfs_close(zhp);
3643
3644         return (rv);
3645 }
3646
3647 /*
3648  * Creates snapshots.  The keys in the snaps nvlist are the snapshots to be
3649  * created.
3650  */
3651 int
3652 zfs_snapshot_nvl(libzfs_handle_t *hdl, nvlist_t *snaps, nvlist_t *props)
3653 {
3654         int ret;
3655         char errbuf[1024];
3656         nvpair_t *elem;
3657         nvlist_t *errors;
3658
3659         (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3660             "cannot create snapshots "));
3661
3662         elem = NULL;
3663         while ((elem = nvlist_next_nvpair(snaps, elem)) != NULL) {
3664                 const char *snapname = nvpair_name(elem);
3665
3666                 /* validate the target name */
3667                 if (!zfs_validate_name(hdl, snapname, ZFS_TYPE_SNAPSHOT,
3668                     B_TRUE)) {
3669                         (void) snprintf(errbuf, sizeof (errbuf),
3670                             dgettext(TEXT_DOMAIN,
3671                             "cannot create snapshot '%s'"), snapname);
3672                         return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3673                 }
3674         }
3675
3676         /*
3677          * get pool handle for prop validation. assumes all snaps are in the
3678          * same pool, as does lzc_snapshot (below).
3679          */
3680         char pool[MAXNAMELEN];
3681         elem = nvlist_next_nvpair(snaps, NULL);
3682         (void) strlcpy(pool, nvpair_name(elem), sizeof (pool));
3683         pool[strcspn(pool, "/@")] = '\0';
3684         zpool_handle_t *zpool_hdl = zpool_open(hdl, pool);
3685
3686         if (props != NULL &&
3687             (props = zfs_valid_proplist(hdl, ZFS_TYPE_SNAPSHOT,
3688             props, B_FALSE, NULL, zpool_hdl, errbuf)) == NULL) {
3689                 zpool_close(zpool_hdl);
3690                 return (-1);
3691         }
3692         zpool_close(zpool_hdl);
3693
3694         ret = lzc_snapshot(snaps, props, &errors);
3695
3696         if (ret != 0) {
3697                 boolean_t printed = B_FALSE;
3698                 for (elem = nvlist_next_nvpair(errors, NULL);
3699                     elem != NULL;
3700                     elem = nvlist_next_nvpair(errors, elem)) {
3701                         (void) snprintf(errbuf, sizeof (errbuf),
3702                             dgettext(TEXT_DOMAIN,
3703                             "cannot create snapshot '%s'"), nvpair_name(elem));
3704                         (void) zfs_standard_error(hdl,
3705                             fnvpair_value_int32(elem), errbuf);
3706                         printed = B_TRUE;
3707                 }
3708                 if (!printed) {
3709                         switch (ret) {
3710                         case EXDEV:
3711                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3712                                     "multiple snapshots of same "
3713                                     "fs not allowed"));
3714                                 (void) zfs_error(hdl, EZFS_EXISTS, errbuf);
3715
3716                                 break;
3717                         default:
3718                                 (void) zfs_standard_error(hdl, ret, errbuf);
3719                         }
3720                 }
3721         }
3722
3723         nvlist_free(props);
3724         nvlist_free(errors);
3725         return (ret);
3726 }
3727
3728 int
3729 zfs_snapshot(libzfs_handle_t *hdl, const char *path, boolean_t recursive,
3730     nvlist_t *props)
3731 {
3732         int ret;
3733         snapdata_t sd = { 0 };
3734         char fsname[ZFS_MAXNAMELEN];
3735         char *cp;
3736         zfs_handle_t *zhp;
3737         char errbuf[1024];
3738
3739         (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3740             "cannot snapshot %s"), path);
3741
3742         if (!zfs_validate_name(hdl, path, ZFS_TYPE_SNAPSHOT, B_TRUE))
3743                 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3744
3745         (void) strlcpy(fsname, path, sizeof (fsname));
3746         cp = strchr(fsname, '@');
3747         *cp = '\0';
3748         sd.sd_snapname = cp + 1;
3749
3750         if ((zhp = zfs_open(hdl, fsname, ZFS_TYPE_FILESYSTEM |
3751             ZFS_TYPE_VOLUME)) == NULL) {
3752                 return (-1);
3753         }
3754
3755         verify(nvlist_alloc(&sd.sd_nvl, NV_UNIQUE_NAME, 0) == 0);
3756         if (recursive) {
3757                 (void) zfs_snapshot_cb(zfs_handle_dup(zhp), &sd);
3758         } else {
3759                 fnvlist_add_boolean(sd.sd_nvl, path);
3760         }
3761
3762         ret = zfs_snapshot_nvl(hdl, sd.sd_nvl, props);
3763         nvlist_free(sd.sd_nvl);
3764         zfs_close(zhp);
3765         return (ret);
3766 }
3767
3768 /*
3769  * Destroy any more recent snapshots.  We invoke this callback on any dependents
3770  * of the snapshot first.  If the 'cb_dependent' member is non-zero, then this
3771  * is a dependent and we should just destroy it without checking the transaction
3772  * group.
3773  */
3774 typedef struct rollback_data {
3775         const char      *cb_target;             /* the snapshot */
3776         uint64_t        cb_create;              /* creation time reference */
3777         boolean_t       cb_error;
3778         boolean_t       cb_force;
3779 } rollback_data_t;
3780
3781 static int
3782 rollback_destroy_dependent(zfs_handle_t *zhp, void *data)
3783 {
3784         rollback_data_t *cbp = data;
3785         prop_changelist_t *clp;
3786
3787         /* We must destroy this clone; first unmount it */
3788         clp = changelist_gather(zhp, ZFS_PROP_NAME, 0,
3789             cbp->cb_force ? MS_FORCE: 0);
3790         if (clp == NULL || changelist_prefix(clp) != 0) {
3791                 cbp->cb_error = B_TRUE;
3792                 zfs_close(zhp);
3793                 return (0);
3794         }
3795         if (zfs_destroy(zhp, B_FALSE) != 0)
3796                 cbp->cb_error = B_TRUE;
3797         else
3798                 changelist_remove(clp, zhp->zfs_name);
3799         (void) changelist_postfix(clp);
3800         changelist_free(clp);
3801
3802         zfs_close(zhp);
3803         return (0);
3804 }
3805
3806 static int
3807 rollback_destroy(zfs_handle_t *zhp, void *data)
3808 {
3809         rollback_data_t *cbp = data;
3810
3811         if (zfs_prop_get_int(zhp, ZFS_PROP_CREATETXG) > cbp->cb_create) {
3812                 cbp->cb_error |= zfs_iter_dependents(zhp, B_FALSE,
3813                     rollback_destroy_dependent, cbp);
3814
3815                 cbp->cb_error |= zfs_destroy(zhp, B_FALSE);
3816         }
3817
3818         zfs_close(zhp);
3819         return (0);
3820 }
3821
3822 /*
3823  * Given a dataset, rollback to a specific snapshot, discarding any
3824  * data changes since then and making it the active dataset.
3825  *
3826  * Any snapshots and bookmarks more recent than the target are
3827  * destroyed, along with their dependents (i.e. clones).
3828  */
3829 int
3830 zfs_rollback(zfs_handle_t *zhp, zfs_handle_t *snap, boolean_t force)
3831 {
3832         rollback_data_t cb = { 0 };
3833         int err;
3834         boolean_t restore_resv = 0;
3835         uint64_t old_volsize, new_volsize;
3836         zfs_prop_t resv_prop;
3837
3838         assert(zhp->zfs_type == ZFS_TYPE_FILESYSTEM ||
3839             zhp->zfs_type == ZFS_TYPE_VOLUME);
3840
3841         /*
3842          * Destroy all recent snapshots and their dependents.
3843          */
3844         cb.cb_force = force;
3845         cb.cb_target = snap->zfs_name;
3846         cb.cb_create = zfs_prop_get_int(snap, ZFS_PROP_CREATETXG);
3847         (void) zfs_iter_snapshots(zhp, B_FALSE, rollback_destroy, &cb);
3848         (void) zfs_iter_bookmarks(zhp, rollback_destroy, &cb);
3849
3850         if (cb.cb_error)
3851                 return (-1);
3852
3853         /*
3854          * Now that we have verified that the snapshot is the latest,
3855          * rollback to the given snapshot.
3856          */
3857
3858         if (zhp->zfs_type == ZFS_TYPE_VOLUME) {
3859                 if (zfs_which_resv_prop(zhp, &resv_prop) < 0)
3860                         return (-1);
3861                 old_volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE);
3862                 restore_resv =
3863                     (old_volsize == zfs_prop_get_int(zhp, resv_prop));
3864         }
3865
3866         /*
3867          * We rely on zfs_iter_children() to verify that there are no
3868          * newer snapshots for the given dataset.  Therefore, we can
3869          * simply pass the name on to the ioctl() call.  There is still
3870          * an unlikely race condition where the user has taken a
3871          * snapshot since we verified that this was the most recent.
3872          */
3873         err = lzc_rollback(zhp->zfs_name, NULL, 0);
3874         if (err != 0) {
3875                 (void) zfs_standard_error_fmt(zhp->zfs_hdl, errno,
3876                     dgettext(TEXT_DOMAIN, "cannot rollback '%s'"),
3877                     zhp->zfs_name);
3878                 return (err);
3879         }
3880
3881         /*
3882          * For volumes, if the pre-rollback volsize matched the pre-
3883          * rollback reservation and the volsize has changed then set
3884          * the reservation property to the post-rollback volsize.
3885          * Make a new handle since the rollback closed the dataset.
3886          */
3887         if ((zhp->zfs_type == ZFS_TYPE_VOLUME) &&
3888             (zhp = make_dataset_handle(zhp->zfs_hdl, zhp->zfs_name))) {
3889                 if (restore_resv) {
3890                         new_volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE);
3891                         if (old_volsize != new_volsize)
3892                                 err = zfs_prop_set_int(zhp, resv_prop,
3893                                     new_volsize);
3894                 }
3895                 zfs_close(zhp);
3896         }
3897         return (err);
3898 }
3899
3900 /*
3901  * Renames the given dataset.
3902  */
3903 int
3904 zfs_rename(zfs_handle_t *zhp, const char *source, const char *target,
3905     renameflags_t flags)
3906 {
3907         int ret;
3908         zfs_cmd_t zc = { 0 };
3909         char *delim;
3910         prop_changelist_t *cl = NULL;
3911         zfs_handle_t *zhrp = NULL;
3912         char *parentname = NULL;
3913         char parent[ZFS_MAXNAMELEN];
3914         char property[ZFS_MAXPROPLEN];
3915         libzfs_handle_t *hdl = zhp->zfs_hdl;
3916         char errbuf[1024];
3917
3918         /* if we have the same exact name, just return success */
3919         if (strcmp(zhp->zfs_name, target) == 0)
3920                 return (0);
3921
3922         (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3923             "cannot rename to '%s'"), target);
3924
3925         if (source != NULL) {
3926                 /*
3927                  * This is recursive snapshots rename, put snapshot name
3928                  * (that might not exist) into zfs_name.
3929                  */
3930                 assert(flags.recurse);
3931
3932                 (void) strlcat(zhp->zfs_name, "@", sizeof(zhp->zfs_name));
3933                 (void) strlcat(zhp->zfs_name, source, sizeof(zhp->zfs_name));
3934                 zhp->zfs_type = ZFS_TYPE_SNAPSHOT;
3935         }
3936
3937         /*
3938          * Make sure the target name is valid
3939          */
3940         if (zhp->zfs_type == ZFS_TYPE_SNAPSHOT) {
3941                 if ((strchr(target, '@') == NULL) ||
3942                     *target == '@') {
3943                         /*
3944                          * Snapshot target name is abbreviated,
3945                          * reconstruct full dataset name
3946                          */
3947                         (void) strlcpy(parent, zhp->zfs_name,
3948                             sizeof (parent));
3949                         delim = strchr(parent, '@');
3950                         if (strchr(target, '@') == NULL)
3951                                 *(++delim) = '\0';
3952                         else
3953                                 *delim = '\0';
3954                         (void) strlcat(parent, target, sizeof (parent));
3955                         target = parent;
3956                 } else {
3957                         /*
3958                          * Make sure we're renaming within the same dataset.
3959                          */
3960                         delim = strchr(target, '@');
3961                         if (strncmp(zhp->zfs_name, target, delim - target)
3962                             != 0 || zhp->zfs_name[delim - target] != '@') {
3963                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3964                                     "snapshots must be part of same "
3965                                     "dataset"));
3966                                 return (zfs_error(hdl, EZFS_CROSSTARGET,
3967                                     errbuf));
3968                         }
3969                 }
3970                 if (!zfs_validate_name(hdl, target, zhp->zfs_type, B_TRUE))
3971                         return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3972         } else {
3973                 if (flags.recurse) {
3974                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3975                             "recursive rename must be a snapshot"));
3976                         return (zfs_error(hdl, EZFS_BADTYPE, errbuf));
3977                 }
3978
3979                 if (!zfs_validate_name(hdl, target, zhp->zfs_type, B_TRUE))
3980                         return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3981
3982                 /* validate parents */
3983                 if (check_parents(hdl, target, NULL, B_FALSE, NULL) != 0)
3984                         return (-1);
3985
3986                 /* make sure we're in the same pool */
3987                 verify((delim = strchr(target, '/')) != NULL);
3988                 if (strncmp(zhp->zfs_name, target, delim - target) != 0 ||
3989                     zhp->zfs_name[delim - target] != '/') {
3990                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3991                             "datasets must be within same pool"));
3992                         return (zfs_error(hdl, EZFS_CROSSTARGET, errbuf));
3993                 }
3994
3995                 /* new name cannot be a child of the current dataset name */
3996                 if (is_descendant(zhp->zfs_name, target)) {
3997                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3998                             "New dataset name cannot be a descendant of "
3999                             "current dataset name"));
4000                         return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
4001                 }
4002         }
4003
4004         (void) snprintf(errbuf, sizeof (errbuf),
4005             dgettext(TEXT_DOMAIN, "cannot rename '%s'"), zhp->zfs_name);
4006
4007         if (getzoneid() == GLOBAL_ZONEID &&
4008             zfs_prop_get_int(zhp, ZFS_PROP_ZONED)) {
4009                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4010                     "dataset is used in a non-global zone"));
4011                 return (zfs_error(hdl, EZFS_ZONED, errbuf));
4012         }
4013
4014         /*
4015          * Avoid unmounting file systems with mountpoint property set to
4016          * 'legacy' or 'none' even if -u option is not given.
4017          */
4018         if (zhp->zfs_type == ZFS_TYPE_FILESYSTEM &&
4019             !flags.recurse && !flags.nounmount &&
4020             zfs_prop_get(zhp, ZFS_PROP_MOUNTPOINT, property,
4021             sizeof (property), NULL, NULL, 0, B_FALSE) == 0 &&
4022             (strcmp(property, "legacy") == 0 ||
4023              strcmp(property, "none") == 0)) {
4024                 flags.nounmount = B_TRUE;
4025         }
4026         if (flags.recurse) {
4027
4028                 parentname = zfs_strdup(zhp->zfs_hdl, zhp->zfs_name);
4029                 if (parentname == NULL) {
4030                         ret = -1;
4031                         goto error;
4032                 }
4033                 delim = strchr(parentname, '@');
4034                 *delim = '\0';
4035                 zhrp = zfs_open(zhp->zfs_hdl, parentname, ZFS_TYPE_DATASET);
4036                 if (zhrp == NULL) {
4037                         ret = -1;
4038                         goto error;
4039                 }
4040         } else if (zhp->zfs_type != ZFS_TYPE_SNAPSHOT) {
4041                 if ((cl = changelist_gather(zhp, ZFS_PROP_NAME,
4042                     flags.nounmount ? CL_GATHER_DONT_UNMOUNT : 0,
4043                     flags.forceunmount ? MS_FORCE : 0)) == NULL) {
4044                         return (-1);
4045                 }
4046
4047                 if (changelist_haszonedchild(cl)) {
4048                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4049                             "child dataset with inherited mountpoint is used "
4050                             "in a non-global zone"));
4051                         (void) zfs_error(hdl, EZFS_ZONED, errbuf);
4052                         goto error;
4053                 }
4054
4055                 if ((ret = changelist_prefix(cl)) != 0)
4056                         goto error;
4057         }
4058
4059         if (ZFS_IS_VOLUME(zhp))
4060                 zc.zc_objset_type = DMU_OST_ZVOL;
4061         else
4062                 zc.zc_objset_type = DMU_OST_ZFS;
4063
4064         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
4065         (void) strlcpy(zc.zc_value, target, sizeof (zc.zc_value));
4066
4067         zc.zc_cookie = flags.recurse ? 1 : 0;
4068         if (flags.nounmount)
4069                 zc.zc_cookie |= 2;
4070
4071         if ((ret = zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_RENAME, &zc)) != 0) {
4072                 /*
4073                  * if it was recursive, the one that actually failed will
4074                  * be in zc.zc_name
4075                  */
4076                 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
4077                     "cannot rename '%s'"), zc.zc_name);
4078
4079                 if (flags.recurse && errno == EEXIST) {
4080                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4081                             "a child dataset already has a snapshot "
4082                             "with the new name"));
4083                         (void) zfs_error(hdl, EZFS_EXISTS, errbuf);
4084                 } else {
4085                         (void) zfs_standard_error(zhp->zfs_hdl, errno, errbuf);
4086                 }
4087
4088                 /*
4089                  * On failure, we still want to remount any filesystems that
4090                  * were previously mounted, so we don't alter the system state.
4091                  */
4092                 if (cl != NULL)
4093                         (void) changelist_postfix(cl);
4094         } else {
4095                 if (cl != NULL) {
4096                         changelist_rename(cl, zfs_get_name(zhp), target);
4097                         ret = changelist_postfix(cl);
4098                 }
4099         }
4100
4101 error:
4102         if (parentname != NULL) {
4103                 free(parentname);
4104         }
4105         if (zhrp != NULL) {
4106                 zfs_close(zhrp);
4107         }
4108         if (cl != NULL) {
4109                 changelist_free(cl);
4110         }
4111         return (ret);
4112 }
4113
4114 nvlist_t *
4115 zfs_get_user_props(zfs_handle_t *zhp)
4116 {
4117         return (zhp->zfs_user_props);
4118 }
4119
4120 nvlist_t *
4121 zfs_get_recvd_props(zfs_handle_t *zhp)
4122 {
4123         if (zhp->zfs_recvd_props == NULL)
4124                 if (get_recvd_props_ioctl(zhp) != 0)
4125                         return (NULL);
4126         return (zhp->zfs_recvd_props);
4127 }
4128
4129 /*
4130  * This function is used by 'zfs list' to determine the exact set of columns to
4131  * display, and their maximum widths.  This does two main things:
4132  *
4133  *      - If this is a list of all properties, then expand the list to include
4134  *        all native properties, and set a flag so that for each dataset we look
4135  *        for new unique user properties and add them to the list.
4136  *
4137  *      - For non fixed-width properties, keep track of the maximum width seen
4138  *        so that we can size the column appropriately. If the user has
4139  *        requested received property values, we also need to compute the width
4140  *        of the RECEIVED column.
4141  */
4142 int
4143 zfs_expand_proplist(zfs_handle_t *zhp, zprop_list_t **plp, boolean_t received,
4144     boolean_t literal)
4145 {
4146         libzfs_handle_t *hdl = zhp->zfs_hdl;
4147         zprop_list_t *entry;
4148         zprop_list_t **last, **start;
4149         nvlist_t *userprops, *propval;
4150         nvpair_t *elem;
4151         char *strval;
4152         char buf[ZFS_MAXPROPLEN];
4153
4154         if (zprop_expand_list(hdl, plp, ZFS_TYPE_DATASET) != 0)
4155                 return (-1);
4156
4157         userprops = zfs_get_user_props(zhp);
4158
4159         entry = *plp;
4160         if (entry->pl_all && nvlist_next_nvpair(userprops, NULL) != NULL) {
4161                 /*
4162                  * Go through and add any user properties as necessary.  We
4163                  * start by incrementing our list pointer to the first
4164                  * non-native property.
4165                  */
4166                 start = plp;
4167                 while (*start != NULL) {
4168                         if ((*start)->pl_prop == ZPROP_INVAL)
4169                                 break;
4170                         start = &(*start)->pl_next;
4171                 }
4172
4173                 elem = NULL;
4174                 while ((elem = nvlist_next_nvpair(userprops, elem)) != NULL) {
4175                         /*
4176                          * See if we've already found this property in our list.
4177                          */
4178                         for (last = start; *last != NULL;
4179                             last = &(*last)->pl_next) {
4180                                 if (strcmp((*last)->pl_user_prop,
4181                                     nvpair_name(elem)) == 0)
4182                                         break;
4183                         }
4184
4185                         if (*last == NULL) {
4186                                 if ((entry = zfs_alloc(hdl,
4187                                     sizeof (zprop_list_t))) == NULL ||
4188                                     ((entry->pl_user_prop = zfs_strdup(hdl,
4189                                     nvpair_name(elem)))) == NULL) {
4190                                         free(entry);
4191                                         return (-1);
4192                                 }
4193
4194                                 entry->pl_prop = ZPROP_INVAL;
4195                                 entry->pl_width = strlen(nvpair_name(elem));
4196                                 entry->pl_all = B_TRUE;
4197                                 *last = entry;
4198                         }
4199                 }
4200         }
4201
4202         /*
4203          * Now go through and check the width of any non-fixed columns
4204          */
4205         for (entry = *plp; entry != NULL; entry = entry->pl_next) {
4206                 if (entry->pl_fixed && !literal)
4207                         continue;
4208
4209                 if (entry->pl_prop != ZPROP_INVAL) {
4210                         if (zfs_prop_get(zhp, entry->pl_prop,
4211                             buf, sizeof (buf), NULL, NULL, 0, literal) == 0) {
4212                                 if (strlen(buf) > entry->pl_width)
4213                                         entry->pl_width = strlen(buf);
4214                         }
4215                         if (received && zfs_prop_get_recvd(zhp,
4216                             zfs_prop_to_name(entry->pl_prop),
4217                             buf, sizeof (buf), literal) == 0)
4218                                 if (strlen(buf) > entry->pl_recvd_width)
4219                                         entry->pl_recvd_width = strlen(buf);
4220                 } else {
4221                         if (nvlist_lookup_nvlist(userprops, entry->pl_user_prop,
4222                             &propval) == 0) {
4223                                 verify(nvlist_lookup_string(propval,
4224                                     ZPROP_VALUE, &strval) == 0);
4225                                 if (strlen(strval) > entry->pl_width)
4226                                         entry->pl_width = strlen(strval);
4227                         }
4228                         if (received && zfs_prop_get_recvd(zhp,
4229                             entry->pl_user_prop,
4230                             buf, sizeof (buf), literal) == 0)
4231                                 if (strlen(buf) > entry->pl_recvd_width)
4232                                         entry->pl_recvd_width = strlen(buf);
4233                 }
4234         }
4235
4236         return (0);
4237 }
4238
4239 int
4240 zfs_deleg_share_nfs(libzfs_handle_t *hdl, char *dataset, char *path,
4241     char *resource, void *export, void *sharetab,
4242     int sharemax, zfs_share_op_t operation)
4243 {
4244         zfs_cmd_t zc = { 0 };
4245         int error;
4246
4247         (void) strlcpy(zc.zc_name, dataset, sizeof (zc.zc_name));
4248         (void) strlcpy(zc.zc_value, path, sizeof (zc.zc_value));
4249         if (resource)
4250                 (void) strlcpy(zc.zc_string, resource, sizeof (zc.zc_string));
4251         zc.zc_share.z_sharedata = (uint64_t)(uintptr_t)sharetab;
4252         zc.zc_share.z_exportdata = (uint64_t)(uintptr_t)export;
4253         zc.zc_share.z_sharetype = operation;
4254         zc.zc_share.z_sharemax = sharemax;
4255         error = ioctl(hdl->libzfs_fd, ZFS_IOC_SHARE, &zc);
4256         return (error);
4257 }
4258
4259 void
4260 zfs_prune_proplist(zfs_handle_t *zhp, uint8_t *props)
4261 {
4262         nvpair_t *curr;
4263
4264         /*
4265          * Keep a reference to the props-table against which we prune the
4266          * properties.
4267          */
4268         zhp->zfs_props_table = props;
4269
4270         curr = nvlist_next_nvpair(zhp->zfs_props, NULL);
4271
4272         while (curr) {
4273                 zfs_prop_t zfs_prop = zfs_name_to_prop(nvpair_name(curr));
4274                 nvpair_t *next = nvlist_next_nvpair(zhp->zfs_props, curr);
4275
4276                 /*
4277                  * User properties will result in ZPROP_INVAL, and since we
4278                  * only know how to prune standard ZFS properties, we always
4279                  * leave these in the list.  This can also happen if we
4280                  * encounter an unknown DSL property (when running older
4281                  * software, for example).
4282                  */
4283                 if (zfs_prop != ZPROP_INVAL && props[zfs_prop] == B_FALSE)
4284                         (void) nvlist_remove(zhp->zfs_props,
4285                             nvpair_name(curr), nvpair_type(curr));
4286                 curr = next;
4287         }
4288 }
4289
4290 #ifdef illumos
4291 static int
4292 zfs_smb_acl_mgmt(libzfs_handle_t *hdl, char *dataset, char *path,
4293     zfs_smb_acl_op_t cmd, char *resource1, char *resource2)
4294 {
4295         zfs_cmd_t zc = { 0 };
4296         nvlist_t *nvlist = NULL;
4297         int error;
4298
4299         (void) strlcpy(zc.zc_name, dataset, sizeof (zc.zc_name));
4300         (void) strlcpy(zc.zc_value, path, sizeof (zc.zc_value));
4301         zc.zc_cookie = (uint64_t)cmd;
4302
4303         if (cmd == ZFS_SMB_ACL_RENAME) {
4304                 if (nvlist_alloc(&nvlist, NV_UNIQUE_NAME, 0) != 0) {
4305                         (void) no_memory(hdl);
4306                         return (0);
4307                 }
4308         }
4309
4310         switch (cmd) {
4311         case ZFS_SMB_ACL_ADD:
4312         case ZFS_SMB_ACL_REMOVE:
4313                 (void) strlcpy(zc.zc_string, resource1, sizeof (zc.zc_string));
4314                 break;
4315         case ZFS_SMB_ACL_RENAME:
4316                 if (nvlist_add_string(nvlist, ZFS_SMB_ACL_SRC,
4317                     resource1) != 0) {
4318                                 (void) no_memory(hdl);
4319                                 return (-1);
4320                 }
4321                 if (nvlist_add_string(nvlist, ZFS_SMB_ACL_TARGET,
4322                     resource2) != 0) {
4323                                 (void) no_memory(hdl);
4324                                 return (-1);
4325                 }
4326                 if (zcmd_write_src_nvlist(hdl, &zc, nvlist) != 0) {
4327                         nvlist_free(nvlist);
4328                         return (-1);
4329                 }
4330                 break;
4331         case ZFS_SMB_ACL_PURGE:
4332                 break;
4333         default:
4334                 return (-1);
4335         }
4336         error = ioctl(hdl->libzfs_fd, ZFS_IOC_SMB_ACL, &zc);
4337         if (nvlist)
4338                 nvlist_free(nvlist);
4339         return (error);
4340 }
4341
4342 int
4343 zfs_smb_acl_add(libzfs_handle_t *hdl, char *dataset,
4344     char *path, char *resource)
4345 {
4346         return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_ADD,
4347             resource, NULL));
4348 }
4349
4350 int
4351 zfs_smb_acl_remove(libzfs_handle_t *hdl, char *dataset,
4352     char *path, char *resource)
4353 {
4354         return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_REMOVE,
4355             resource, NULL));
4356 }
4357
4358 int
4359 zfs_smb_acl_purge(libzfs_handle_t *hdl, char *dataset, char *path)
4360 {
4361         return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_PURGE,
4362             NULL, NULL));
4363 }
4364
4365 int
4366 zfs_smb_acl_rename(libzfs_handle_t *hdl, char *dataset, char *path,
4367     char *oldname, char *newname)
4368 {
4369         return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_RENAME,
4370             oldname, newname));
4371 }
4372 #endif  /* illumos */
4373
4374 int
4375 zfs_userspace(zfs_handle_t *zhp, zfs_userquota_prop_t type,
4376     zfs_userspace_cb_t func, void *arg)
4377 {
4378         zfs_cmd_t zc = { 0 };
4379         zfs_useracct_t buf[100];
4380         libzfs_handle_t *hdl = zhp->zfs_hdl;
4381         int ret;
4382
4383         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
4384
4385         zc.zc_objset_type = type;
4386         zc.zc_nvlist_dst = (uintptr_t)buf;
4387
4388         for (;;) {
4389                 zfs_useracct_t *zua = buf;
4390
4391                 zc.zc_nvlist_dst_size = sizeof (buf);
4392                 if (zfs_ioctl(hdl, ZFS_IOC_USERSPACE_MANY, &zc) != 0) {
4393                         char errbuf[1024];
4394
4395                         (void) snprintf(errbuf, sizeof (errbuf),
4396                             dgettext(TEXT_DOMAIN,
4397                             "cannot get used/quota for %s"), zc.zc_name);
4398                         return (zfs_standard_error_fmt(hdl, errno, errbuf));
4399                 }
4400                 if (zc.zc_nvlist_dst_size == 0)
4401                         break;
4402
4403                 while (zc.zc_nvlist_dst_size > 0) {
4404                         if ((ret = func(arg, zua->zu_domain, zua->zu_rid,
4405                             zua->zu_space)) != 0)
4406                                 return (ret);
4407                         zua++;
4408                         zc.zc_nvlist_dst_size -= sizeof (zfs_useracct_t);
4409                 }
4410         }
4411
4412         return (0);
4413 }
4414
4415 struct holdarg {
4416         nvlist_t *nvl;
4417         const char *snapname;
4418         const char *tag;
4419         boolean_t recursive;
4420         int error;
4421 };
4422
4423 static int
4424 zfs_hold_one(zfs_handle_t *zhp, void *arg)
4425 {
4426         struct holdarg *ha = arg;
4427         char name[ZFS_MAXNAMELEN];
4428         int rv = 0;
4429
4430         (void) snprintf(name, sizeof (name),
4431             "%s@%s", zhp->zfs_name, ha->snapname);
4432
4433         if (lzc_exists(name))
4434                 fnvlist_add_string(ha->nvl, name, ha->tag);
4435
4436         if (ha->recursive)
4437                 rv = zfs_iter_filesystems(zhp, zfs_hold_one, ha);
4438         zfs_close(zhp);
4439         return (rv);
4440 }
4441
4442 int
4443 zfs_hold(zfs_handle_t *zhp, const char *snapname, const char *tag,
4444     boolean_t recursive, int cleanup_fd)
4445 {
4446         int ret;
4447         struct holdarg ha;
4448
4449         ha.nvl = fnvlist_alloc();
4450         ha.snapname = snapname;
4451         ha.tag = tag;
4452         ha.recursive = recursive;
4453         (void) zfs_hold_one(zfs_handle_dup(zhp), &ha);
4454
4455         if (nvlist_empty(ha.nvl)) {
4456                 char errbuf[1024];
4457
4458                 fnvlist_free(ha.nvl);
4459                 ret = ENOENT;
4460                 (void) snprintf(errbuf, sizeof (errbuf),
4461                     dgettext(TEXT_DOMAIN,
4462                     "cannot hold snapshot '%s@%s'"),
4463                     zhp->zfs_name, snapname);
4464                 (void) zfs_standard_error(zhp->zfs_hdl, ret, errbuf);
4465                 return (ret);
4466         }
4467
4468         ret = zfs_hold_nvl(zhp, cleanup_fd, ha.nvl);
4469         fnvlist_free(ha.nvl);
4470
4471         return (ret);
4472 }
4473
4474 int
4475 zfs_hold_nvl(zfs_handle_t *zhp, int cleanup_fd, nvlist_t *holds)
4476 {
4477         int ret;
4478         nvlist_t *errors;
4479         libzfs_handle_t *hdl = zhp->zfs_hdl;
4480         char errbuf[1024];
4481         nvpair_t *elem;
4482
4483         errors = NULL;
4484         ret = lzc_hold(holds, cleanup_fd, &errors);
4485
4486         if (ret == 0) {
4487                 /* There may be errors even in the success case. */
4488                 fnvlist_free(errors);
4489                 return (0);
4490         }
4491
4492         if (nvlist_empty(errors)) {
4493                 /* no hold-specific errors */
4494                 (void) snprintf(errbuf, sizeof (errbuf),
4495                     dgettext(TEXT_DOMAIN, "cannot hold"));
4496                 switch (ret) {
4497                 case ENOTSUP:
4498                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4499                             "pool must be upgraded"));
4500                         (void) zfs_error(hdl, EZFS_BADVERSION, errbuf);
4501                         break;
4502                 case EINVAL:
4503                         (void) zfs_error(hdl, EZFS_BADTYPE, errbuf);
4504                         break;
4505                 default:
4506                         (void) zfs_standard_error(hdl, ret, errbuf);
4507                 }
4508         }
4509
4510         for (elem = nvlist_next_nvpair(errors, NULL);
4511             elem != NULL;
4512             elem = nvlist_next_nvpair(errors, elem)) {
4513                 (void) snprintf(errbuf, sizeof (errbuf),
4514                     dgettext(TEXT_DOMAIN,
4515                     "cannot hold snapshot '%s'"), nvpair_name(elem));
4516                 switch (fnvpair_value_int32(elem)) {
4517                 case E2BIG:
4518                         /*
4519                          * Temporary tags wind up having the ds object id
4520                          * prepended. So even if we passed the length check
4521                          * above, it's still possible for the tag to wind
4522                          * up being slightly too long.
4523                          */
4524                         (void) zfs_error(hdl, EZFS_TAGTOOLONG, errbuf);
4525                         break;
4526                 case EINVAL:
4527                         (void) zfs_error(hdl, EZFS_BADTYPE, errbuf);
4528                         break;
4529                 case EEXIST:
4530                         (void) zfs_error(hdl, EZFS_REFTAG_HOLD, errbuf);
4531                         break;
4532                 default:
4533                         (void) zfs_standard_error(hdl,
4534                             fnvpair_value_int32(elem), errbuf);
4535                 }
4536         }
4537
4538         fnvlist_free(errors);
4539         return (ret);
4540 }
4541
4542 static int
4543 zfs_release_one(zfs_handle_t *zhp, void *arg)
4544 {
4545         struct holdarg *ha = arg;
4546         char name[ZFS_MAXNAMELEN];
4547         int rv = 0;
4548         nvlist_t *existing_holds;
4549
4550         (void) snprintf(name, sizeof (name),
4551             "%s@%s", zhp->zfs_name, ha->snapname);
4552
4553         if (lzc_get_holds(name, &existing_holds) != 0) {
4554                 ha->error = ENOENT;
4555         } else if (!nvlist_exists(existing_holds, ha->tag)) {
4556                 ha->error = ESRCH;
4557         } else {
4558                 nvlist_t *torelease = fnvlist_alloc();
4559                 fnvlist_add_boolean(torelease, ha->tag);
4560                 fnvlist_add_nvlist(ha->nvl, name, torelease);
4561                 fnvlist_free(torelease);
4562         }
4563
4564         if (ha->recursive)
4565                 rv = zfs_iter_filesystems(zhp, zfs_release_one, ha);
4566         zfs_close(zhp);
4567         return (rv);
4568 }
4569
4570 int
4571 zfs_release(zfs_handle_t *zhp, const char *snapname, const char *tag,
4572     boolean_t recursive)
4573 {
4574         int ret;
4575         struct holdarg ha;
4576         nvlist_t *errors = NULL;
4577         nvpair_t *elem;
4578         libzfs_handle_t *hdl = zhp->zfs_hdl;
4579         char errbuf[1024];
4580
4581         ha.nvl = fnvlist_alloc();
4582         ha.snapname = snapname;
4583         ha.tag = tag;
4584         ha.recursive = recursive;
4585         ha.error = 0;
4586         (void) zfs_release_one(zfs_handle_dup(zhp), &ha);
4587
4588         if (nvlist_empty(ha.nvl)) {
4589                 fnvlist_free(ha.nvl);
4590                 ret = ha.error;
4591                 (void) snprintf(errbuf, sizeof (errbuf),
4592                     dgettext(TEXT_DOMAIN,
4593                     "cannot release hold from snapshot '%s@%s'"),
4594                     zhp->zfs_name, snapname);
4595                 if (ret == ESRCH) {
4596                         (void) zfs_error(hdl, EZFS_REFTAG_RELE, errbuf);
4597                 } else {
4598                         (void) zfs_standard_error(hdl, ret, errbuf);
4599                 }
4600                 return (ret);
4601         }
4602
4603         ret = lzc_release(ha.nvl, &errors);
4604         fnvlist_free(ha.nvl);
4605
4606         if (ret == 0) {
4607                 /* There may be errors even in the success case. */
4608                 fnvlist_free(errors);
4609                 return (0);
4610         }
4611
4612         if (nvlist_empty(errors)) {
4613                 /* no hold-specific errors */
4614                 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
4615                     "cannot release"));
4616                 switch (errno) {
4617                 case ENOTSUP:
4618                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4619                             "pool must be upgraded"));
4620                         (void) zfs_error(hdl, EZFS_BADVERSION, errbuf);
4621                         break;
4622                 default:
4623                         (void) zfs_standard_error_fmt(hdl, errno, errbuf);
4624                 }
4625         }
4626
4627         for (elem = nvlist_next_nvpair(errors, NULL);
4628             elem != NULL;
4629             elem = nvlist_next_nvpair(errors, elem)) {
4630                 (void) snprintf(errbuf, sizeof (errbuf),
4631                     dgettext(TEXT_DOMAIN,
4632                     "cannot release hold from snapshot '%s'"),
4633                     nvpair_name(elem));
4634                 switch (fnvpair_value_int32(elem)) {
4635                 case ESRCH:
4636                         (void) zfs_error(hdl, EZFS_REFTAG_RELE, errbuf);
4637                         break;
4638                 case EINVAL:
4639                         (void) zfs_error(hdl, EZFS_BADTYPE, errbuf);
4640                         break;
4641                 default:
4642                         (void) zfs_standard_error_fmt(hdl,
4643                             fnvpair_value_int32(elem), errbuf);
4644                 }
4645         }
4646
4647         fnvlist_free(errors);
4648         return (ret);
4649 }
4650
4651 int
4652 zfs_get_fsacl(zfs_handle_t *zhp, nvlist_t **nvl)
4653 {
4654         zfs_cmd_t zc = { 0 };
4655         libzfs_handle_t *hdl = zhp->zfs_hdl;
4656         int nvsz = 2048;
4657         void *nvbuf;
4658         int err = 0;
4659         char errbuf[1024];
4660
4661         assert(zhp->zfs_type == ZFS_TYPE_VOLUME ||
4662             zhp->zfs_type == ZFS_TYPE_FILESYSTEM);
4663
4664 tryagain:
4665
4666         nvbuf = malloc(nvsz);
4667         if (nvbuf == NULL) {
4668                 err = (zfs_error(hdl, EZFS_NOMEM, strerror(errno)));
4669                 goto out;
4670         }
4671
4672         zc.zc_nvlist_dst_size = nvsz;
4673         zc.zc_nvlist_dst = (uintptr_t)nvbuf;
4674
4675         (void) strlcpy(zc.zc_name, zhp->zfs_name, ZFS_MAXNAMELEN);
4676
4677         if (ioctl(hdl->libzfs_fd, ZFS_IOC_GET_FSACL, &zc) != 0) {
4678                 (void) snprintf(errbuf, sizeof (errbuf),
4679                     dgettext(TEXT_DOMAIN, "cannot get permissions on '%s'"),
4680                     zc.zc_name);
4681                 switch (errno) {
4682                 case ENOMEM:
4683                         free(nvbuf);
4684                         nvsz = zc.zc_nvlist_dst_size;
4685                         goto tryagain;
4686
4687                 case ENOTSUP:
4688                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4689                             "pool must be upgraded"));
4690                         err = zfs_error(hdl, EZFS_BADVERSION, errbuf);
4691                         break;
4692                 case EINVAL:
4693                         err = zfs_error(hdl, EZFS_BADTYPE, errbuf);
4694                         break;
4695                 case ENOENT:
4696                         err = zfs_error(hdl, EZFS_NOENT, errbuf);
4697                         break;
4698                 default:
4699                         err = zfs_standard_error_fmt(hdl, errno, errbuf);
4700                         break;
4701                 }
4702         } else {
4703                 /* success */
4704                 int rc = nvlist_unpack(nvbuf, zc.zc_nvlist_dst_size, nvl, 0);
4705                 if (rc) {
4706                         (void) snprintf(errbuf, sizeof (errbuf), dgettext(
4707                             TEXT_DOMAIN, "cannot get permissions on '%s'"),
4708                             zc.zc_name);
4709                         err = zfs_standard_error_fmt(hdl, rc, errbuf);
4710                 }
4711         }
4712
4713         free(nvbuf);
4714 out:
4715         return (err);
4716 }
4717
4718 int
4719 zfs_set_fsacl(zfs_handle_t *zhp, boolean_t un, nvlist_t *nvl)
4720 {
4721         zfs_cmd_t zc = { 0 };
4722         libzfs_handle_t *hdl = zhp->zfs_hdl;
4723         char *nvbuf;
4724         char errbuf[1024];
4725         size_t nvsz;
4726         int err;
4727
4728         assert(zhp->zfs_type == ZFS_TYPE_VOLUME ||
4729             zhp->zfs_type == ZFS_TYPE_FILESYSTEM);
4730
4731         err = nvlist_size(nvl, &nvsz, NV_ENCODE_NATIVE);
4732         assert(err == 0);
4733
4734         nvbuf = malloc(nvsz);
4735
4736         err = nvlist_pack(nvl, &nvbuf, &nvsz, NV_ENCODE_NATIVE, 0);
4737         assert(err == 0);
4738
4739         zc.zc_nvlist_src_size = nvsz;
4740         zc.zc_nvlist_src = (uintptr_t)nvbuf;
4741         zc.zc_perm_action = un;
4742
4743         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
4744
4745         if (zfs_ioctl(hdl, ZFS_IOC_SET_FSACL, &zc) != 0) {
4746                 (void) snprintf(errbuf, sizeof (errbuf),
4747                     dgettext(TEXT_DOMAIN, "cannot set permissions on '%s'"),
4748                     zc.zc_name);
4749                 switch (errno) {
4750                 case ENOTSUP:
4751                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4752                             "pool must be upgraded"));
4753                         err = zfs_error(hdl, EZFS_BADVERSION, errbuf);
4754                         break;
4755                 case EINVAL:
4756                         err = zfs_error(hdl, EZFS_BADTYPE, errbuf);
4757                         break;
4758                 case ENOENT:
4759                         err = zfs_error(hdl, EZFS_NOENT, errbuf);
4760                         break;
4761                 default:
4762                         err = zfs_standard_error_fmt(hdl, errno, errbuf);
4763                         break;
4764                 }
4765         }
4766
4767         free(nvbuf);
4768
4769         return (err);
4770 }
4771
4772 int
4773 zfs_get_holds(zfs_handle_t *zhp, nvlist_t **nvl)
4774 {
4775         int err;
4776         char errbuf[1024];
4777
4778         err = lzc_get_holds(zhp->zfs_name, nvl);
4779
4780         if (err != 0) {
4781                 libzfs_handle_t *hdl = zhp->zfs_hdl;
4782
4783                 (void) snprintf(errbuf, sizeof (errbuf),
4784                     dgettext(TEXT_DOMAIN, "cannot get holds for '%s'"),
4785                     zhp->zfs_name);
4786                 switch (err) {
4787                 case ENOTSUP:
4788                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4789                             "pool must be upgraded"));
4790                         err = zfs_error(hdl, EZFS_BADVERSION, errbuf);
4791                         break;
4792                 case EINVAL:
4793                         err = zfs_error(hdl, EZFS_BADTYPE, errbuf);
4794                         break;
4795                 case ENOENT:
4796                         err = zfs_error(hdl, EZFS_NOENT, errbuf);
4797                         break;
4798                 default:
4799                         err = zfs_standard_error_fmt(hdl, errno, errbuf);
4800                         break;
4801                 }
4802         }
4803
4804         return (err);
4805 }
4806
4807 /*
4808  * Convert the zvol's volume size to an appropriate reservation.
4809  * Note: If this routine is updated, it is necessary to update the ZFS test
4810  * suite's shell version in reservation.kshlib.
4811  */
4812 uint64_t
4813 zvol_volsize_to_reservation(uint64_t volsize, nvlist_t *props)
4814 {
4815         uint64_t numdb;
4816         uint64_t nblocks, volblocksize;
4817         int ncopies;
4818         char *strval;
4819
4820         if (nvlist_lookup_string(props,
4821             zfs_prop_to_name(ZFS_PROP_COPIES), &strval) == 0)
4822                 ncopies = atoi(strval);
4823         else
4824                 ncopies = 1;
4825         if (nvlist_lookup_uint64(props,
4826             zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE),
4827             &volblocksize) != 0)
4828                 volblocksize = ZVOL_DEFAULT_BLOCKSIZE;
4829         nblocks = volsize/volblocksize;
4830         /* start with metadnode L0-L6 */
4831         numdb = 7;
4832         /* calculate number of indirects */
4833         while (nblocks > 1) {
4834                 nblocks += DNODES_PER_LEVEL - 1;
4835                 nblocks /= DNODES_PER_LEVEL;
4836                 numdb += nblocks;
4837         }
4838         numdb *= MIN(SPA_DVAS_PER_BP, ncopies + 1);
4839         volsize *= ncopies;
4840         /*
4841          * this is exactly DN_MAX_INDBLKSHIFT when metadata isn't
4842          * compressed, but in practice they compress down to about
4843          * 1100 bytes
4844          */
4845         numdb *= 1ULL << DN_MAX_INDBLKSHIFT;
4846         volsize += numdb;
4847         return (volsize);
4848 }
4849
4850 /*
4851  * Attach/detach the given filesystem to/from the given jail.
4852  */
4853 int
4854 zfs_jail(zfs_handle_t *zhp, int jailid, int attach)
4855 {
4856         libzfs_handle_t *hdl = zhp->zfs_hdl;
4857         zfs_cmd_t zc = { 0 };
4858         char errbuf[1024];
4859         unsigned long cmd;
4860         int ret;
4861
4862         if (attach) {
4863                 (void) snprintf(errbuf, sizeof (errbuf),
4864                     dgettext(TEXT_DOMAIN, "cannot jail '%s'"), zhp->zfs_name);
4865         } else {
4866                 (void) snprintf(errbuf, sizeof (errbuf),
4867                     dgettext(TEXT_DOMAIN, "cannot unjail '%s'"), zhp->zfs_name);
4868         }
4869
4870         switch (zhp->zfs_type) {
4871         case ZFS_TYPE_VOLUME:
4872                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4873                     "volumes can not be jailed"));
4874                 return (zfs_error(hdl, EZFS_BADTYPE, errbuf));
4875         case ZFS_TYPE_SNAPSHOT:
4876                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4877                     "snapshots can not be jailed"));
4878                 return (zfs_error(hdl, EZFS_BADTYPE, errbuf));
4879         }
4880         assert(zhp->zfs_type == ZFS_TYPE_FILESYSTEM);
4881
4882         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
4883         zc.zc_objset_type = DMU_OST_ZFS;
4884         zc.zc_jailid = jailid;
4885
4886         cmd = attach ? ZFS_IOC_JAIL : ZFS_IOC_UNJAIL;
4887         if ((ret = ioctl(hdl->libzfs_fd, cmd, &zc)) != 0)
4888                 zfs_standard_error(hdl, errno, errbuf);
4889
4890         return (ret);
4891 }