lib/libzfs/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) 2010 Nexenta Systems, Inc. All rights reserved.
  25  * Copyright (c) 2011 by Delphix. All rights reserved.
  26  */
  27
  28 #include <ctype.h>
  29 #include <errno.h>
  30 #include <libintl.h>
  31 #include <math.h>
  32 #include <stdio.h>
  33 #include <stdlib.h>
  34 #include <strings.h>
  35 #include <unistd.h>
  36 #include <stddef.h>
  37 #include <zone.h>
  38 #include <fcntl.h>
  39 #include <sys/mntent.h>
  40 #include <sys/mount.h>
  41 #include <priv.h>
  42 #include <pwd.h>
  43 #include <grp.h>
  44 #include <stddef.h>
  45 #include <ucred.h>
  46 #ifdef HAVE_IDMAP
  47 #include <idmap.h>
  48 #include <aclutils.h>
  49 #include <directory.h>
  50 #endif /* HAVE_IDMAP */
  51
  52 #include <sys/dnode.h>
  53 #include <sys/spa.h>
  54 #include <sys/zap.h>
  55 #include <libzfs.h>
  56
  57 #include "zfs_namecheck.h"
  58 #include "zfs_prop.h"
  59 #include "libzfs_impl.h"
  60 #include "zfs_deleg.h"
  61
  62 static int zvol_create_link_common(libzfs_handle_t *, const char *, int);
  63 static int userquota_propname_decode(const char *propname, boolean_t zoned,
  64     zfs_userquota_prop_t *typep, char *domain, int domainlen, uint64_t *ridp);
  65
  66 /*
  67  * Given a single type (not a mask of types), return the type in a human
  68  * readable form.
  69  */
  70 const char *
  71 zfs_type_to_name(zfs_type_t type)
  72 {
  73         switch (type) {
  74         case ZFS_TYPE_FILESYSTEM:
  75                 return (dgettext(TEXT_DOMAIN, "filesystem"));
  76         case ZFS_TYPE_SNAPSHOT:
  77                 return (dgettext(TEXT_DOMAIN, "snapshot"));
  78         case ZFS_TYPE_VOLUME:
  79                 return (dgettext(TEXT_DOMAIN, "volume"));
  80         default:
  81                 break;
  82         }
  83
  84         return (NULL);
  85 }
  86
  87 /*
  88  * Validate a ZFS path.  This is used even before trying to open the dataset, to
  89  * provide a more meaningful error message.  We call zfs_error_aux() to
  90  * explain exactly why the name was not valid.
  91  */
  92 int
  93 zfs_validate_name(libzfs_handle_t *hdl, const char *path, int type,
  94     boolean_t modifying)
  95 {
  96         namecheck_err_t why;
  97         char what;
  98
  99         (void) zfs_prop_get_table();
 100         if (dataset_namecheck(path, &why, &what) != 0) {
 101                 if (hdl != NULL) {
 102                         switch (why) {
 103                         case NAME_ERR_TOOLONG:
 104                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 105                                     "name is too long"));
 106                                 break;
 107
 108                         case NAME_ERR_LEADING_SLASH:
 109                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 110                                     "leading slash in name"));
 111                                 break;
 112
 113                         case NAME_ERR_EMPTY_COMPONENT:
 114                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 115                                     "empty component in name"));
 116                                 break;
 117
 118                         case NAME_ERR_TRAILING_SLASH:
 119                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 120                                     "trailing slash in name"));
 121                                 break;
 122
 123                         case NAME_ERR_INVALCHAR:
 124                                 zfs_error_aux(hdl,
 125                                     dgettext(TEXT_DOMAIN, "invalid character "
 126                                     "'%c' in name"), what);
 127                                 break;
 128
 129                         case NAME_ERR_MULTIPLE_AT:
 130                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 131                                     "multiple '@' delimiters in name"));
 132                                 break;
 133
 134                         case NAME_ERR_NOLETTER:
 135                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 136                                     "pool doesn't begin with a letter"));
 137                                 break;
 138
 139                         case NAME_ERR_RESERVED:
 140                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 141                                     "name is reserved"));
 142                                 break;
 143
 144                         case NAME_ERR_DISKLIKE:
 145                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 146                                     "reserved disk name"));
 147                                 break;
 148                         default:
 149                                 break;
 150                         }
 151                 }
 152
 153                 return (0);
 154         }
 155
 156         if (!(type & ZFS_TYPE_SNAPSHOT) && strchr(path, '@') != NULL) {
 157                 if (hdl != NULL)
 158                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 159                             "snapshot delimiter '@' in filesystem name"));
 160                 return (0);
 161         }
 162
 163         if (type == ZFS_TYPE_SNAPSHOT && strchr(path, '@') == NULL) {
 164                 if (hdl != NULL)
 165                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 166                             "missing '@' delimiter in snapshot name"));
 167                 return (0);
 168         }
 169
 170         if (modifying && strchr(path, '%') != NULL) {
 171                 if (hdl != NULL)
 172                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 173                             "invalid character %c in name"), '%');
 174                 return (0);
 175         }
 176
 177         return (-1);
 178 }
 179
 180 int
 181 zfs_name_valid(const char *name, zfs_type_t type)
 182 {
 183         if (type == ZFS_TYPE_POOL)
 184                 return (zpool_name_valid(NULL, B_FALSE, name));
 185         return (zfs_validate_name(NULL, name, type, B_FALSE));
 186 }
 187
 188 /*
 189  * This function takes the raw DSL properties, and filters out the user-defined
 190  * properties into a separate nvlist.
 191  */
 192 static nvlist_t *
 193 process_user_props(zfs_handle_t *zhp, nvlist_t *props)
 194 {
 195         libzfs_handle_t *hdl = zhp->zfs_hdl;
 196         nvpair_t *elem;
 197         nvlist_t *propval;
 198         nvlist_t *nvl;
 199
 200         if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0) != 0) {
 201                 (void) no_memory(hdl);
 202                 return (NULL);
 203         }
 204
 205         elem = NULL;
 206         while ((elem = nvlist_next_nvpair(props, elem)) != NULL) {
 207                 if (!zfs_prop_user(nvpair_name(elem)))
 208                         continue;
 209
 210                 verify(nvpair_value_nvlist(elem, &propval) == 0);
 211                 if (nvlist_add_nvlist(nvl, nvpair_name(elem), propval) != 0) {
 212                         nvlist_free(nvl);
 213                         (void) no_memory(hdl);
 214                         return (NULL);
 215                 }
 216         }
 217
 218         return (nvl);
 219 }
 220
 221 static zpool_handle_t *
 222 zpool_add_handle(zfs_handle_t *zhp, const char *pool_name)
 223 {
 224         libzfs_handle_t *hdl = zhp->zfs_hdl;
 225         zpool_handle_t *zph;
 226
 227         if ((zph = zpool_open_canfail(hdl, pool_name)) != NULL) {
 228                 if (hdl->libzfs_pool_handles != NULL)
 229                         zph->zpool_next = hdl->libzfs_pool_handles;
 230                 hdl->libzfs_pool_handles = zph;
 231         }
 232         return (zph);
 233 }
 234
 235 static zpool_handle_t *
 236 zpool_find_handle(zfs_handle_t *zhp, const char *pool_name, int len)
 237 {
 238         libzfs_handle_t *hdl = zhp->zfs_hdl;
 239         zpool_handle_t *zph = hdl->libzfs_pool_handles;
 240
 241         while ((zph != NULL) &&
 242             (strncmp(pool_name, zpool_get_name(zph), len) != 0))
 243                 zph = zph->zpool_next;
 244         return (zph);
 245 }
 246
 247 /*
 248  * Returns a handle to the pool that contains the provided dataset.
 249  * If a handle to that pool already exists then that handle is returned.
 250  * Otherwise, a new handle is created and added to the list of handles.
 251  */
 252 static zpool_handle_t *
 253 zpool_handle(zfs_handle_t *zhp)
 254 {
 255         char *pool_name;
 256         int len;
 257         zpool_handle_t *zph;
 258
 259         len = strcspn(zhp->zfs_name, "/@") + 1;
 260         pool_name = zfs_alloc(zhp->zfs_hdl, len);
 261         (void) strlcpy(pool_name, zhp->zfs_name, len);
 262
 263         zph = zpool_find_handle(zhp, pool_name, len);
 264         if (zph == NULL)
 265                 zph = zpool_add_handle(zhp, pool_name);
 266
 267         free(pool_name);
 268         return (zph);
 269 }
 270
 271 void
 272 zpool_free_handles(libzfs_handle_t *hdl)
 273 {
 274         zpool_handle_t *next, *zph = hdl->libzfs_pool_handles;
 275
 276         while (zph != NULL) {
 277                 next = zph->zpool_next;
 278                 zpool_close(zph);
 279                 zph = next;
 280         }
 281         hdl->libzfs_pool_handles = NULL;
 282 }
 283
 284 /*
 285  * Utility function to gather stats (objset and zpl) for the given object.
 286  */
 287 static int
 288 get_stats_ioctl(zfs_handle_t *zhp, zfs_cmd_t *zc)
 289 {
 290         libzfs_handle_t *hdl = zhp->zfs_hdl;
 291
 292         (void) strlcpy(zc->zc_name, zhp->zfs_name, sizeof (zc->zc_name));
 293
 294         while (ioctl(hdl->libzfs_fd, ZFS_IOC_OBJSET_STATS, zc) != 0) {
 295                 if (errno == ENOMEM) {
 296                         if (zcmd_expand_dst_nvlist(hdl, zc) != 0) {
 297                                 return (-1);
 298                         }
 299                 } else {
 300                         return (-1);
 301                 }
 302         }
 303         return (0);
 304 }
 305
 306 /*
 307  * Utility function to get the received properties of the given object.
 308  */
 309 static int
 310 get_recvd_props_ioctl(zfs_handle_t *zhp)
 311 {
 312         libzfs_handle_t *hdl = zhp->zfs_hdl;
 313         nvlist_t *recvdprops;
 314         zfs_cmd_t zc = { "\0", "\0", "\0", "\0", 0 };
 315         int err;
 316
 317         if (zcmd_alloc_dst_nvlist(hdl, &zc, 0) != 0)
 318                 return (-1);
 319
 320         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
 321
 322         while (ioctl(hdl->libzfs_fd, ZFS_IOC_OBJSET_RECVD_PROPS, &zc) != 0) {
 323                 if (errno == ENOMEM) {
 324                         if (zcmd_expand_dst_nvlist(hdl, &zc) != 0) {
 325                                 return (-1);
 326                         }
 327                 } else {
 328                         zcmd_free_nvlists(&zc);
 329                         return (-1);
 330                 }
 331         }
 332
 333         err = zcmd_read_dst_nvlist(zhp->zfs_hdl, &zc, &recvdprops);
 334         zcmd_free_nvlists(&zc);
 335         if (err != 0)
 336                 return (-1);
 337
 338         nvlist_free(zhp->zfs_recvd_props);
 339         zhp->zfs_recvd_props = recvdprops;
 340
 341         return (0);
 342 }
 343
 344 static int
 345 put_stats_zhdl(zfs_handle_t *zhp, zfs_cmd_t *zc)
 346 {
 347         nvlist_t *allprops, *userprops;
 348
 349         zhp->zfs_dmustats = zc->zc_objset_stats; /* structure assignment */
 350
 351         if (zcmd_read_dst_nvlist(zhp->zfs_hdl, zc, &allprops) != 0) {
 352                 return (-1);
 353         }
 354
 355         /*
 356          * XXX Why do we store the user props separately, in addition to
 357          * storing them in zfs_props?
 358          */
 359         if ((userprops = process_user_props(zhp, allprops)) == NULL) {
 360                 nvlist_free(allprops);
 361                 return (-1);
 362         }
 363
 364         nvlist_free(zhp->zfs_props);
 365         nvlist_free(zhp->zfs_user_props);
 366
 367         zhp->zfs_props = allprops;
 368         zhp->zfs_user_props = userprops;
 369
 370         return (0);
 371 }
 372
 373 static int
 374 get_stats(zfs_handle_t *zhp)
 375 {
 376         int rc = 0;
 377         zfs_cmd_t zc = { "\0", "\0", "\0", "\0", 0 };
 378
 379         if (zcmd_alloc_dst_nvlist(zhp->zfs_hdl, &zc, 0) != 0)
 380                 return (-1);
 381         if (get_stats_ioctl(zhp, &zc) != 0)
 382                 rc = -1;
 383         else if (put_stats_zhdl(zhp, &zc) != 0)
 384                 rc = -1;
 385         zcmd_free_nvlists(&zc);
 386         return (rc);
 387 }
 388
 389 /*
 390  * Refresh the properties currently stored in the handle.
 391  */
 392 void
 393 zfs_refresh_properties(zfs_handle_t *zhp)
 394 {
 395         (void) get_stats(zhp);
 396 }
 397
 398 /*
 399  * Makes a handle from the given dataset name.  Used by zfs_open() and
 400  * zfs_iter_* to create child handles on the fly.
 401  */
 402 static int
 403 make_dataset_handle_common(zfs_handle_t *zhp, zfs_cmd_t *zc)
 404 {
 405         if (put_stats_zhdl(zhp, zc) != 0)
 406                 return (-1);
 407
 408         /*
 409          * We've managed to open the dataset and gather statistics.  Determine
 410          * the high-level type.
 411          */
 412         if (zhp->zfs_dmustats.dds_type == DMU_OST_ZVOL)
 413                 zhp->zfs_head_type = ZFS_TYPE_VOLUME;
 414         else if (zhp->zfs_dmustats.dds_type == DMU_OST_ZFS)
 415                 zhp->zfs_head_type = ZFS_TYPE_FILESYSTEM;
 416         else
 417                 abort();
 418
 419         if (zhp->zfs_dmustats.dds_is_snapshot)
 420                 zhp->zfs_type = ZFS_TYPE_SNAPSHOT;
 421         else if (zhp->zfs_dmustats.dds_type == DMU_OST_ZVOL)
 422                 zhp->zfs_type = ZFS_TYPE_VOLUME;
 423         else if (zhp->zfs_dmustats.dds_type == DMU_OST_ZFS)
 424                 zhp->zfs_type = ZFS_TYPE_FILESYSTEM;
 425         else
 426                 abort();        /* we should never see any other types */
 427
 428         if ((zhp->zpool_hdl = zpool_handle(zhp)) == NULL)
 429                 return (-1);
 430
 431         return (0);
 432 }
 433
 434 zfs_handle_t *
 435 make_dataset_handle(libzfs_handle_t *hdl, const char *path)
 436 {
 437         zfs_cmd_t zc = { "\0", "\0", "\0", "\0", 0 };
 438
 439         zfs_handle_t *zhp = calloc(sizeof (zfs_handle_t), 1);
 440
 441         if (zhp == NULL)
 442                 return (NULL);
 443
 444         zhp->zfs_hdl = hdl;
 445         (void) strlcpy(zhp->zfs_name, path, sizeof (zhp->zfs_name));
 446         if (zcmd_alloc_dst_nvlist(hdl, &zc, 0) != 0) {
 447                 free(zhp);
 448                 return (NULL);
 449         }
 450         if (get_stats_ioctl(zhp, &zc) == -1) {
 451                 zcmd_free_nvlists(&zc);
 452                 free(zhp);
 453                 return (NULL);
 454         }
 455         if (make_dataset_handle_common(zhp, &zc) == -1) {
 456                 free(zhp);
 457                 zhp = NULL;
 458         }
 459         zcmd_free_nvlists(&zc);
 460         return (zhp);
 461 }
 462
 463 static zfs_handle_t *
 464 make_dataset_handle_zc(libzfs_handle_t *hdl, zfs_cmd_t *zc)
 465 {
 466         zfs_handle_t *zhp = calloc(sizeof (zfs_handle_t), 1);
 467
 468         if (zhp == NULL)
 469                 return (NULL);
 470
 471         zhp->zfs_hdl = hdl;
 472         (void) strlcpy(zhp->zfs_name, zc->zc_name, sizeof (zhp->zfs_name));
 473         if (make_dataset_handle_common(zhp, zc) == -1) {
 474                 free(zhp);
 475                 return (NULL);
 476         }
 477         return (zhp);
 478 }
 479
 480 /*
 481  * Opens the given snapshot, filesystem, or volume.   The 'types'
 482  * argument is a mask of acceptable types.  The function will print an
 483  * appropriate error message and return NULL if it can't be opened.
 484  */
 485 zfs_handle_t *
 486 zfs_open(libzfs_handle_t *hdl, const char *path, int types)
 487 {
 488         zfs_handle_t *zhp;
 489         char errbuf[1024];
 490
 491         (void) snprintf(errbuf, sizeof (errbuf),
 492             dgettext(TEXT_DOMAIN, "cannot open '%s'"), path);
 493
 494         /*
 495          * Validate the name before we even try to open it.
 496          */
 497         if (!zfs_validate_name(hdl, path, ZFS_TYPE_DATASET, B_FALSE)) {
 498                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 499                     "invalid dataset name"));
 500                 (void) zfs_error(hdl, EZFS_INVALIDNAME, errbuf);
 501                 return (NULL);
 502         }
 503
 504         /*
 505          * Try to get stats for the dataset, which will tell us if it exists.
 506          */
 507         errno = 0;
 508         if ((zhp = make_dataset_handle(hdl, path)) == NULL) {
 509                 (void) zfs_standard_error(hdl, errno, errbuf);
 510                 return (NULL);
 511         }
 512
 513         if (!(types & zhp->zfs_type)) {
 514                 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf);
 515                 zfs_close(zhp);
 516                 return (NULL);
 517         }
 518
 519         return (zhp);
 520 }
 521
 522 /*
 523  * Release a ZFS handle.  Nothing to do but free the associated memory.
 524  */
 525 void
 526 zfs_close(zfs_handle_t *zhp)
 527 {
 528         if (zhp->zfs_mntopts)
 529                 free(zhp->zfs_mntopts);
 530         nvlist_free(zhp->zfs_props);
 531         nvlist_free(zhp->zfs_user_props);
 532         nvlist_free(zhp->zfs_recvd_props);
 533         free(zhp);
 534 }
 535
 536 typedef struct mnttab_node {
 537         struct mnttab mtn_mt;
 538         avl_node_t mtn_node;
 539 } mnttab_node_t;
 540
 541 static int
 542 libzfs_mnttab_cache_compare(const void *arg1, const void *arg2)
 543 {
 544         const mnttab_node_t *mtn1 = arg1;
 545         const mnttab_node_t *mtn2 = arg2;
 546         int rv;
 547
 548         rv = strcmp(mtn1->mtn_mt.mnt_special, mtn2->mtn_mt.mnt_special);
 549
 550         if (rv == 0)
 551                 return (0);
 552         return (rv > 0 ? 1 : -1);
 553 }
 554
 555 void
 556 libzfs_mnttab_init(libzfs_handle_t *hdl)
 557 {
 558         assert(avl_numnodes(&hdl->libzfs_mnttab_cache) == 0);
 559         avl_create(&hdl->libzfs_mnttab_cache, libzfs_mnttab_cache_compare,
 560             sizeof (mnttab_node_t), offsetof(mnttab_node_t, mtn_node));
 561 }
 562
 563 void
 564 libzfs_mnttab_update(libzfs_handle_t *hdl)
 565 {
 566         struct mnttab entry;
 567
 568         rewind(hdl->libzfs_mnttab);
 569         while (getmntent(hdl->libzfs_mnttab, &entry) == 0) {
 570                 mnttab_node_t *mtn;
 571
 572                 if (strcmp(entry.mnt_fstype, MNTTYPE_ZFS) != 0)
 573                         continue;
 574                 mtn = zfs_alloc(hdl, sizeof (mnttab_node_t));
 575                 mtn->mtn_mt.mnt_special = zfs_strdup(hdl, entry.mnt_special);
 576                 mtn->mtn_mt.mnt_mountp = zfs_strdup(hdl, entry.mnt_mountp);
 577                 mtn->mtn_mt.mnt_fstype = zfs_strdup(hdl, entry.mnt_fstype);
 578                 mtn->mtn_mt.mnt_mntopts = zfs_strdup(hdl, entry.mnt_mntopts);
 579                 avl_add(&hdl->libzfs_mnttab_cache, mtn);
 580         }
 581 }
 582
 583 void
 584 libzfs_mnttab_fini(libzfs_handle_t *hdl)
 585 {
 586         void *cookie = NULL;
 587         mnttab_node_t *mtn;
 588
 589         while ((mtn = avl_destroy_nodes(&hdl->libzfs_mnttab_cache, &cookie))) {
 590                 free(mtn->mtn_mt.mnt_special);
 591                 free(mtn->mtn_mt.mnt_mountp);
 592                 free(mtn->mtn_mt.mnt_fstype);
 593                 free(mtn->mtn_mt.mnt_mntopts);
 594                 free(mtn);
 595         }
 596         avl_destroy(&hdl->libzfs_mnttab_cache);
 597 }
 598
 599 void
 600 libzfs_mnttab_cache(libzfs_handle_t *hdl, boolean_t enable)
 601 {
 602         hdl->libzfs_mnttab_enable = enable;
 603 }
 604
 605 int
 606 libzfs_mnttab_find(libzfs_handle_t *hdl, const char *fsname,
 607     struct mnttab *entry)
 608 {
 609         mnttab_node_t find;
 610         mnttab_node_t *mtn;
 611
 612         if (!hdl->libzfs_mnttab_enable) {
 613                 struct mnttab srch = { 0 };
 614
 615                 if (avl_numnodes(&hdl->libzfs_mnttab_cache))
 616                         libzfs_mnttab_fini(hdl);
 617                 rewind(hdl->libzfs_mnttab);
 618                 srch.mnt_special = (char *)fsname;
 619                 srch.mnt_fstype = MNTTYPE_ZFS;
 620                 if (getmntany(hdl->libzfs_mnttab, entry, &srch) == 0)
 621                         return (0);
 622                 else
 623                         return (ENOENT);
 624         }
 625
 626         if (avl_numnodes(&hdl->libzfs_mnttab_cache) == 0)
 627                 libzfs_mnttab_update(hdl);
 628
 629         find.mtn_mt.mnt_special = (char *)fsname;
 630         mtn = avl_find(&hdl->libzfs_mnttab_cache, &find, NULL);
 631         if (mtn) {
 632                 *entry = mtn->mtn_mt;
 633                 return (0);
 634         }
 635         return (ENOENT);
 636 }
 637
 638 void
 639 libzfs_mnttab_add(libzfs_handle_t *hdl, const char *special,
 640     const char *mountp, const char *mntopts)
 641 {
 642         mnttab_node_t *mtn;
 643
 644         if (avl_numnodes(&hdl->libzfs_mnttab_cache) == 0)
 645                 return;
 646         mtn = zfs_alloc(hdl, sizeof (mnttab_node_t));
 647         mtn->mtn_mt.mnt_special = zfs_strdup(hdl, special);
 648         mtn->mtn_mt.mnt_mountp = zfs_strdup(hdl, mountp);
 649         mtn->mtn_mt.mnt_fstype = zfs_strdup(hdl, MNTTYPE_ZFS);
 650         mtn->mtn_mt.mnt_mntopts = zfs_strdup(hdl, mntopts);
 651         avl_add(&hdl->libzfs_mnttab_cache, mtn);
 652 }
 653
 654 void
 655 libzfs_mnttab_remove(libzfs_handle_t *hdl, const char *fsname)
 656 {
 657         mnttab_node_t find;
 658         mnttab_node_t *ret;
 659
 660         find.mtn_mt.mnt_special = (char *)fsname;
 661         if ((ret = avl_find(&hdl->libzfs_mnttab_cache, (void *)&find, NULL))) {
 662                 avl_remove(&hdl->libzfs_mnttab_cache, ret);
 663                 free(ret->mtn_mt.mnt_special);
 664                 free(ret->mtn_mt.mnt_mountp);
 665                 free(ret->mtn_mt.mnt_fstype);
 666                 free(ret->mtn_mt.mnt_mntopts);
 667                 free(ret);
 668         }
 669 }
 670
 671 int
 672 zfs_spa_version(zfs_handle_t *zhp, int *spa_version)
 673 {
 674         zpool_handle_t *zpool_handle = zhp->zpool_hdl;
 675
 676         if (zpool_handle == NULL)
 677                 return (-1);
 678
 679         *spa_version = zpool_get_prop_int(zpool_handle,
 680             ZPOOL_PROP_VERSION, NULL);
 681         return (0);
 682 }
 683
 684 /*
 685  * The choice of reservation property depends on the SPA version.
 686  */
 687 static int
 688 zfs_which_resv_prop(zfs_handle_t *zhp, zfs_prop_t *resv_prop)
 689 {
 690         int spa_version;
 691
 692         if (zfs_spa_version(zhp, &spa_version) < 0)
 693                 return (-1);
 694
 695         if (spa_version >= SPA_VERSION_REFRESERVATION)
 696                 *resv_prop = ZFS_PROP_REFRESERVATION;
 697         else
 698                 *resv_prop = ZFS_PROP_RESERVATION;
 699
 700         return (0);
 701 }
 702
 703 /*
 704  * Given an nvlist of properties to set, validates that they are correct, and
 705  * parses any numeric properties (index, boolean, etc) if they are specified as
 706  * strings.
 707  */
 708 nvlist_t *
 709 zfs_valid_proplist(libzfs_handle_t *hdl, zfs_type_t type, nvlist_t *nvl,
 710     uint64_t zoned, zfs_handle_t *zhp, const char *errbuf)
 711 {
 712         nvpair_t *elem;
 713         uint64_t intval;
 714         char *strval;
 715         zfs_prop_t prop;
 716         nvlist_t *ret;
 717         int chosen_normal = -1;
 718         int chosen_utf = -1;
 719
 720         if (nvlist_alloc(&ret, NV_UNIQUE_NAME, 0) != 0) {
 721                 (void) no_memory(hdl);
 722                 return (NULL);
 723         }
 724
 725         /*
 726          * Make sure this property is valid and applies to this type.
 727          */
 728
 729         elem = NULL;
 730         while ((elem = nvlist_next_nvpair(nvl, elem)) != NULL) {
 731                 const char *propname = nvpair_name(elem);
 732
 733                 prop = zfs_name_to_prop(propname);
 734                 if (prop == ZPROP_INVAL && zfs_prop_user(propname)) {
 735                         /*
 736                          * This is a user property: make sure it's a
 737                          * string, and that it's less than ZAP_MAXNAMELEN.
 738                          */
 739                         if (nvpair_type(elem) != DATA_TYPE_STRING) {
 740                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 741                                     "'%s' must be a string"), propname);
 742                                 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
 743                                 goto error;
 744                         }
 745
 746                         if (strlen(nvpair_name(elem)) >= ZAP_MAXNAMELEN) {
 747                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 748                                     "property name '%s' is too long"),
 749                                     propname);
 750                                 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
 751                                 goto error;
 752                         }
 753
 754                         (void) nvpair_value_string(elem, &strval);
 755                         if (nvlist_add_string(ret, propname, strval) != 0) {
 756                                 (void) no_memory(hdl);
 757                                 goto error;
 758                         }
 759                         continue;
 760                 }
 761
 762                 /*
 763                  * Currently, only user properties can be modified on
 764                  * snapshots.
 765                  */
 766                 if (type == ZFS_TYPE_SNAPSHOT) {
 767                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 768                             "this property can not be modified for snapshots"));
 769                         (void) zfs_error(hdl, EZFS_PROPTYPE, errbuf);
 770                         goto error;
 771                 }
 772
 773                 if (prop == ZPROP_INVAL && zfs_prop_userquota(propname)) {
 774                         zfs_userquota_prop_t uqtype;
 775                         char newpropname[128];
 776                         char domain[128];
 777                         uint64_t rid;
 778                         uint64_t valary[3];
 779
 780                         if (userquota_propname_decode(propname, zoned,
 781                             &uqtype, domain, sizeof (domain), &rid) != 0) {
 782                                 zfs_error_aux(hdl,
 783                                     dgettext(TEXT_DOMAIN,
 784                                     "'%s' has an invalid user/group name"),
 785                                     propname);
 786                                 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
 787                                 goto error;
 788                         }
 789
 790                         if (uqtype != ZFS_PROP_USERQUOTA &&
 791                             uqtype != ZFS_PROP_GROUPQUOTA) {
 792                                 zfs_error_aux(hdl,
 793                                     dgettext(TEXT_DOMAIN, "'%s' is readonly"),
 794                                     propname);
 795                                 (void) zfs_error(hdl, EZFS_PROPREADONLY,
 796                                     errbuf);
 797                                 goto error;
 798                         }
 799
 800                         if (nvpair_type(elem) == DATA_TYPE_STRING) {
 801                                 (void) nvpair_value_string(elem, &strval);
 802                                 if (strcmp(strval, "none") == 0) {
 803                                         intval = 0;
 804                                 } else if (zfs_nicestrtonum(hdl,
 805                                     strval, &intval) != 0) {
 806                                         (void) zfs_error(hdl,
 807                                             EZFS_BADPROP, errbuf);
 808                                         goto error;
 809                                 }
 810                         } else if (nvpair_type(elem) ==
 811                             DATA_TYPE_UINT64) {
 812                                 (void) nvpair_value_uint64(elem, &intval);
 813                                 if (intval == 0) {
 814                                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 815                                             "use 'none' to disable "
 816                                             "userquota/groupquota"));
 817                                         goto error;
 818                                 }
 819                         } else {
 820                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 821                                     "'%s' must be a number"), propname);
 822                                 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
 823                                 goto error;
 824                         }
 825
 826                         /*
 827                          * Encode the prop name as
 828                          * userquota@<hex-rid>-domain, to make it easy
 829                          * for the kernel to decode.
 830                          */
 831                         (void) snprintf(newpropname, sizeof (newpropname),
 832                             "%s%llx-%s", zfs_userquota_prop_prefixes[uqtype],
 833                             (longlong_t)rid, domain);
 834                         valary[0] = uqtype;
 835                         valary[1] = rid;
 836                         valary[2] = intval;
 837                         if (nvlist_add_uint64_array(ret, newpropname,
 838                             valary, 3) != 0) {
 839                                 (void) no_memory(hdl);
 840                                 goto error;
 841                         }
 842                         continue;
 843                 }
 844
 845                 if (prop == ZPROP_INVAL) {
 846                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 847                             "invalid property '%s'"), propname);
 848                         (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
 849                         goto error;
 850                 }
 851
 852                 if (!zfs_prop_valid_for_type(prop, type)) {
 853                         zfs_error_aux(hdl,
 854                             dgettext(TEXT_DOMAIN, "'%s' does not "
 855                             "apply to datasets of this type"), propname);
 856                         (void) zfs_error(hdl, EZFS_PROPTYPE, errbuf);
 857                         goto error;
 858                 }
 859
 860                 if (zfs_prop_readonly(prop) &&
 861                     (!zfs_prop_setonce(prop) || zhp != NULL)) {
 862                         zfs_error_aux(hdl,
 863                             dgettext(TEXT_DOMAIN, "'%s' is readonly"),
 864                             propname);
 865                         (void) zfs_error(hdl, EZFS_PROPREADONLY, errbuf);
 866                         goto error;
 867                 }
 868
 869                 if (zprop_parse_value(hdl, elem, prop, type, ret,
 870                     &strval, &intval, errbuf) != 0)
 871                         goto error;
 872
 873                 /*
 874                  * Perform some additional checks for specific properties.
 875                  */
 876                 switch (prop) {
 877                 case ZFS_PROP_VERSION:
 878                 {
 879                         int version;
 880
 881                         if (zhp == NULL)
 882                                 break;
 883                         version = zfs_prop_get_int(zhp, ZFS_PROP_VERSION);
 884                         if (intval < version) {
 885                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 886                                     "Can not downgrade; already at version %u"),
 887                                     version);
 888                                 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
 889                                 goto error;
 890                         }
 891                         break;
 892                 }
 893
 894                 case ZFS_PROP_RECORDSIZE:
 895                 case ZFS_PROP_VOLBLOCKSIZE:
 896                         /* must be power of two within SPA_{MIN,MAX}BLOCKSIZE */
 897                         if (intval < SPA_MINBLOCKSIZE ||
 898                             intval > SPA_MAXBLOCKSIZE || !ISP2(intval)) {
 899                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 900                                     "'%s' must be power of 2 from %u "
 901                                     "to %uk"), propname,
 902                                     (uint_t)SPA_MINBLOCKSIZE,
 903                                     (uint_t)SPA_MAXBLOCKSIZE >> 10);
 904                                 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
 905                                 goto error;
 906                         }
 907                         break;
 908
 909                 case ZFS_PROP_MLSLABEL:
 910                 {
 911 #ifdef HAVE_MLSLABEL
 912                         /*
 913                          * Verify the mlslabel string and convert to
 914                          * internal hex label string.
 915                          */
 916
 917                         m_label_t *new_sl;
 918                         char *hex = NULL;       /* internal label string */
 919
 920                         /* Default value is already OK. */
 921                         if (strcasecmp(strval, ZFS_MLSLABEL_DEFAULT) == 0)
 922                                 break;
 923
 924                         /* Verify the label can be converted to binary form */
 925                         if (((new_sl = m_label_alloc(MAC_LABEL)) == NULL) ||
 926                             (str_to_label(strval, &new_sl, MAC_LABEL,
 927                             L_NO_CORRECTION, NULL) == -1)) {
 928                                 goto badlabel;
 929                         }
 930
 931                         /* Now translate to hex internal label string */
 932                         if (label_to_str(new_sl, &hex, M_INTERNAL,
 933                             DEF_NAMES) != 0) {
 934                                 if (hex)
 935                                         free(hex);
 936                                 goto badlabel;
 937                         }
 938                         m_label_free(new_sl);
 939
 940                         /* If string is already in internal form, we're done. */
 941                         if (strcmp(strval, hex) == 0) {
 942                                 free(hex);
 943                                 break;
 944                         }
 945
 946                         /* Replace the label string with the internal form. */
 947                         (void) nvlist_remove(ret, zfs_prop_to_name(prop),
 948                             DATA_TYPE_STRING);
 949                         verify(nvlist_add_string(ret, zfs_prop_to_name(prop),
 950                             hex) == 0);
 951                         free(hex);
 952
 953                         break;
 954
 955 badlabel:
 956                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 957                             "invalid mlslabel '%s'"), strval);
 958                         (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
 959                         m_label_free(new_sl);   /* OK if null */
 960                         goto error;
 961 #else
 962                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 963                             "mlslabels are unsupported"));
 964                         (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
 965                         goto error;
 966 #endif /* HAVE_MLSLABEL */
 967                 }
 968
 969                 case ZFS_PROP_MOUNTPOINT:
 970                 {
 971                         namecheck_err_t why;
 972
 973                         if (strcmp(strval, ZFS_MOUNTPOINT_NONE) == 0 ||
 974                             strcmp(strval, ZFS_MOUNTPOINT_LEGACY) == 0)
 975                                 break;
 976
 977                         if (mountpoint_namecheck(strval, &why)) {
 978                                 switch (why) {
 979                                 case NAME_ERR_LEADING_SLASH:
 980                                         zfs_error_aux(hdl,
 981                                             dgettext(TEXT_DOMAIN,
 982                                             "'%s' must be an absolute path, "
 983                                             "'none', or 'legacy'"), propname);
 984                                         break;
 985                                 case NAME_ERR_TOOLONG:
 986                                         zfs_error_aux(hdl,
 987                                             dgettext(TEXT_DOMAIN,
 988                                             "component of '%s' is too long"),
 989                                             propname);
 990                                         break;
 991                                 default:
 992                                         break;
 993                                 }
 994                                 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
 995                                 goto error;
 996                         }
 997                 }
 998
 999                         /*FALLTHRU*/
1000
1001                 case ZFS_PROP_SHARESMB:
1002                 case ZFS_PROP_SHARENFS:
1003                         /*
1004                          * For the mountpoint and sharenfs or sharesmb
1005                          * properties, check if it can be set in a
1006                          * global/non-global zone based on
1007                          * the zoned property value:
1008                          *
1009                          *              global zone         non-global zone
1010                          * --------------------------------------------------
1011                          * zoned=on     mountpoint (no)     mountpoint (yes)
1012                          *              sharenfs (no)       sharenfs (no)
1013                          *              sharesmb (no)       sharesmb (no)
1014                          *
1015                          * zoned=off    mountpoint (yes)        N/A
1016                          *              sharenfs (yes)
1017                          *              sharesmb (yes)
1018                          */
1019                         if (zoned) {
1020                                 if (getzoneid() == GLOBAL_ZONEID) {
1021                                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1022                                             "'%s' cannot be set on "
1023                                             "dataset in a non-global zone"),
1024                                             propname);
1025                                         (void) zfs_error(hdl, EZFS_ZONED,
1026                                             errbuf);
1027                                         goto error;
1028                                 } else if (prop == ZFS_PROP_SHARENFS ||
1029                                     prop == ZFS_PROP_SHARESMB) {
1030                                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1031                                             "'%s' cannot be set in "
1032                                             "a non-global zone"), propname);
1033                                         (void) zfs_error(hdl, EZFS_ZONED,
1034                                             errbuf);
1035                                         goto error;
1036                                 }
1037                         } else if (getzoneid() != GLOBAL_ZONEID) {
1038                                 /*
1039                                  * If zoned property is 'off', this must be in
1040                                  * a global zone. If not, something is wrong.
1041                                  */
1042                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1043                                     "'%s' cannot be set while dataset "
1044                                     "'zoned' property is set"), propname);
1045                                 (void) zfs_error(hdl, EZFS_ZONED, errbuf);
1046                                 goto error;
1047                         }
1048
1049                         /*
1050                          * At this point, it is legitimate to set the
1051                          * property. Now we want to make sure that the
1052                          * property value is valid if it is sharenfs.
1053                          */
1054                         if ((prop == ZFS_PROP_SHARENFS ||
1055                             prop == ZFS_PROP_SHARESMB) &&
1056                             strcmp(strval, "on") != 0 &&
1057                             strcmp(strval, "off") != 0) {
1058                                 zfs_share_proto_t proto;
1059
1060                                 if (prop == ZFS_PROP_SHARESMB)
1061                                         proto = PROTO_SMB;
1062                                 else
1063                                         proto = PROTO_NFS;
1064
1065                                 /*
1066                                  * Must be an valid sharing protocol
1067                                  * option string so init the libshare
1068                                  * in order to enable the parser and
1069                                  * then parse the options. We use the
1070                                  * control API since we don't care about
1071                                  * the current configuration and don't
1072                                  * want the overhead of loading it
1073                                  * until we actually do something.
1074                                  */
1075
1076                                 if (zfs_init_libshare(hdl,
1077                                     SA_INIT_CONTROL_API) != SA_OK) {
1078                                         /*
1079                                          * An error occurred so we can't do
1080                                          * anything
1081                                          */
1082                                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1083                                             "'%s' cannot be set: problem "
1084                                             "in share initialization"),
1085                                             propname);
1086                                         (void) zfs_error(hdl, EZFS_BADPROP,
1087                                             errbuf);
1088                                         goto error;
1089                                 }
1090
1091                                 if (zfs_parse_options(strval, proto) != SA_OK) {
1092                                         /*
1093                                          * There was an error in parsing so
1094                                          * deal with it by issuing an error
1095                                          * message and leaving after
1096                                          * uninitializing the the libshare
1097                                          * interface.
1098                                          */
1099                                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1100                                             "'%s' cannot be set to invalid "
1101                                             "options"), propname);
1102                                         (void) zfs_error(hdl, EZFS_BADPROP,
1103                                             errbuf);
1104                                         zfs_uninit_libshare(hdl);
1105                                         goto error;
1106                                 }
1107                                 zfs_uninit_libshare(hdl);
1108                         }
1109
1110                         break;
1111                 case ZFS_PROP_UTF8ONLY:
1112                         chosen_utf = (int)intval;
1113                         break;
1114                 case ZFS_PROP_NORMALIZE:
1115                         chosen_normal = (int)intval;
1116                         break;
1117                 default:
1118                         break;
1119                 }
1120
1121                 /*
1122                  * For changes to existing volumes, we have some additional
1123                  * checks to enforce.
1124                  */
1125                 if (type == ZFS_TYPE_VOLUME && zhp != NULL) {
1126                         uint64_t volsize = zfs_prop_get_int(zhp,
1127                             ZFS_PROP_VOLSIZE);
1128                         uint64_t blocksize = zfs_prop_get_int(zhp,
1129                             ZFS_PROP_VOLBLOCKSIZE);
1130                         char buf[64];
1131
1132                         switch (prop) {
1133                         case ZFS_PROP_RESERVATION:
1134                         case ZFS_PROP_REFRESERVATION:
1135                                 if (intval > volsize) {
1136                                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1137                                             "'%s' is greater than current "
1138                                             "volume size"), propname);
1139                                         (void) zfs_error(hdl, EZFS_BADPROP,
1140                                             errbuf);
1141                                         goto error;
1142                                 }
1143                                 break;
1144
1145                         case ZFS_PROP_VOLSIZE:
1146                                 if (intval % blocksize != 0) {
1147                                         zfs_nicenum(blocksize, buf,
1148                                             sizeof (buf));
1149                                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1150                                             "'%s' must be a multiple of "
1151                                             "volume block size (%s)"),
1152                                             propname, buf);
1153                                         (void) zfs_error(hdl, EZFS_BADPROP,
1154                                             errbuf);
1155                                         goto error;
1156                                 }
1157
1158                                 if (intval == 0) {
1159                                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1160                                             "'%s' cannot be zero"),
1161                                             propname);
1162                                         (void) zfs_error(hdl, EZFS_BADPROP,
1163                                             errbuf);
1164                                         goto error;
1165                                 }
1166                                 break;
1167                         default:
1168                                 break;
1169                         }
1170                 }
1171         }
1172
1173         /*
1174          * If normalization was chosen, but no UTF8 choice was made,
1175          * enforce rejection of non-UTF8 names.
1176          *
1177          * If normalization was chosen, but rejecting non-UTF8 names
1178          * was explicitly not chosen, it is an error.
1179          */
1180         if (chosen_normal > 0 && chosen_utf < 0) {
1181                 if (nvlist_add_uint64(ret,
1182                     zfs_prop_to_name(ZFS_PROP_UTF8ONLY), 1) != 0) {
1183                         (void) no_memory(hdl);
1184                         goto error;
1185                 }
1186         } else if (chosen_normal > 0 && chosen_utf == 0) {
1187                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1188                     "'%s' must be set 'on' if normalization chosen"),
1189                     zfs_prop_to_name(ZFS_PROP_UTF8ONLY));
1190                 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1191                 goto error;
1192         }
1193         return (ret);
1194
1195 error:
1196         nvlist_free(ret);
1197         return (NULL);
1198 }
1199
1200 int
1201 zfs_add_synthetic_resv(zfs_handle_t *zhp, nvlist_t *nvl)
1202 {
1203         uint64_t old_volsize;
1204         uint64_t new_volsize;
1205         uint64_t old_reservation;
1206         uint64_t new_reservation;
1207         zfs_prop_t resv_prop;
1208
1209         /*
1210          * If this is an existing volume, and someone is setting the volsize,
1211          * make sure that it matches the reservation, or add it if necessary.
1212          */
1213         old_volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE);
1214         if (zfs_which_resv_prop(zhp, &resv_prop) < 0)
1215                 return (-1);
1216         old_reservation = zfs_prop_get_int(zhp, resv_prop);
1217         if ((zvol_volsize_to_reservation(old_volsize, zhp->zfs_props) !=
1218             old_reservation) || nvlist_lookup_uint64(nvl,
1219             zfs_prop_to_name(resv_prop), &new_reservation) != ENOENT) {
1220                 return (0);
1221         }
1222         if (nvlist_lookup_uint64(nvl, zfs_prop_to_name(ZFS_PROP_VOLSIZE),
1223             &new_volsize) != 0)
1224                 return (-1);
1225         new_reservation = zvol_volsize_to_reservation(new_volsize,
1226             zhp->zfs_props);
1227         if (nvlist_add_uint64(nvl, zfs_prop_to_name(resv_prop),
1228             new_reservation) != 0) {
1229                 (void) no_memory(zhp->zfs_hdl);
1230                 return (-1);
1231         }
1232         return (1);
1233 }
1234
1235 void
1236 zfs_setprop_error(libzfs_handle_t *hdl, zfs_prop_t prop, int err,
1237     char *errbuf)
1238 {
1239         switch (err) {
1240
1241         case ENOSPC:
1242                 /*
1243                  * For quotas and reservations, ENOSPC indicates
1244                  * something different; setting a quota or reservation
1245                  * doesn't use any disk space.
1246                  */
1247                 switch (prop) {
1248                 case ZFS_PROP_QUOTA:
1249                 case ZFS_PROP_REFQUOTA:
1250                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1251                             "size is less than current used or "
1252                             "reserved space"));
1253                         (void) zfs_error(hdl, EZFS_PROPSPACE, errbuf);
1254                         break;
1255
1256                 case ZFS_PROP_RESERVATION:
1257                 case ZFS_PROP_REFRESERVATION:
1258                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1259                             "size is greater than available space"));
1260                         (void) zfs_error(hdl, EZFS_PROPSPACE, errbuf);
1261                         break;
1262
1263                 default:
1264                         (void) zfs_standard_error(hdl, err, errbuf);
1265                         break;
1266                 }
1267                 break;
1268
1269         case EBUSY:
1270                 (void) zfs_standard_error(hdl, EBUSY, errbuf);
1271                 break;
1272
1273         case EROFS:
1274                 (void) zfs_error(hdl, EZFS_DSREADONLY, errbuf);
1275                 break;
1276
1277         case ENOTSUP:
1278                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1279                     "pool and or dataset must be upgraded to set this "
1280                     "property or value"));
1281                 (void) zfs_error(hdl, EZFS_BADVERSION, errbuf);
1282                 break;
1283
1284         case ERANGE:
1285                 if (prop == ZFS_PROP_COMPRESSION) {
1286                         (void) zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1287                             "property setting is not allowed on "
1288                             "bootable datasets"));
1289                         (void) zfs_error(hdl, EZFS_NOTSUP, errbuf);
1290                 } else {
1291                         (void) zfs_standard_error(hdl, err, errbuf);
1292                 }
1293                 break;
1294
1295         case EINVAL:
1296                 if (prop == ZPROP_INVAL) {
1297                         (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1298                 } else {
1299                         (void) zfs_standard_error(hdl, err, errbuf);
1300                 }
1301                 break;
1302
1303         case EOVERFLOW:
1304                 /*
1305                  * This platform can't address a volume this big.
1306                  */
1307 #ifdef _ILP32
1308                 if (prop == ZFS_PROP_VOLSIZE) {
1309                         (void) zfs_error(hdl, EZFS_VOLTOOBIG, errbuf);
1310                         break;
1311                 }
1312 #endif
1313                 /* FALLTHROUGH */
1314         default:
1315                 (void) zfs_standard_error(hdl, err, errbuf);
1316         }
1317 }
1318
1319 static boolean_t
1320 zfs_is_namespace_prop(zfs_prop_t prop)
1321 {
1322         switch (prop) {
1323
1324         case ZFS_PROP_ATIME:
1325         case ZFS_PROP_DEVICES:
1326         case ZFS_PROP_EXEC:
1327         case ZFS_PROP_SETUID:
1328         case ZFS_PROP_READONLY:
1329         case ZFS_PROP_XATTR:
1330         case ZFS_PROP_NBMAND:
1331                 return (B_TRUE);
1332
1333         default:
1334                 return (B_FALSE);
1335         }
1336 }
1337
1338 /*
1339  * Given a property name and value, set the property for the given dataset.
1340  */
1341 int
1342 zfs_prop_set(zfs_handle_t *zhp, const char *propname, const char *propval)
1343 {
1344         zfs_cmd_t zc = { "\0", "\0", "\0", "\0", 0 };
1345         int ret = -1;
1346         prop_changelist_t *cl = NULL;
1347         char errbuf[1024];
1348         libzfs_handle_t *hdl = zhp->zfs_hdl;
1349         nvlist_t *nvl = NULL, *realprops;
1350         zfs_prop_t prop;
1351         boolean_t do_prefix;
1352         uint64_t idx;
1353         int added_resv = 0;
1354
1355         (void) snprintf(errbuf, sizeof (errbuf),
1356             dgettext(TEXT_DOMAIN, "cannot set property for '%s'"),
1357             zhp->zfs_name);
1358
1359         if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0) != 0 ||
1360             nvlist_add_string(nvl, propname, propval) != 0) {
1361                 (void) no_memory(hdl);
1362                 goto error;
1363         }
1364
1365         if ((realprops = zfs_valid_proplist(hdl, zhp->zfs_type, nvl,
1366             zfs_prop_get_int(zhp, ZFS_PROP_ZONED), zhp, errbuf)) == NULL)
1367                 goto error;
1368
1369         nvlist_free(nvl);
1370         nvl = realprops;
1371
1372         prop = zfs_name_to_prop(propname);
1373
1374         if (prop == ZFS_PROP_VOLSIZE) {
1375                 if ((added_resv = zfs_add_synthetic_resv(zhp, nvl)) == -1)
1376                         goto error;
1377         }
1378
1379         if ((cl = changelist_gather(zhp, prop, 0, 0)) == NULL)
1380                 goto error;
1381
1382         if (prop == ZFS_PROP_MOUNTPOINT && changelist_haszonedchild(cl)) {
1383                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1384                     "child dataset with inherited mountpoint is used "
1385                     "in a non-global zone"));
1386                 ret = zfs_error(hdl, EZFS_ZONED, errbuf);
1387                 goto error;
1388         }
1389
1390         /*
1391          * If the dataset's canmount property is being set to noauto,
1392          * then we want to prevent unmounting & remounting it.
1393          */
1394         do_prefix = !((prop == ZFS_PROP_CANMOUNT) &&
1395             (zprop_string_to_index(prop, propval, &idx,
1396             ZFS_TYPE_DATASET) == 0) && (idx == ZFS_CANMOUNT_NOAUTO));
1397
1398         if (do_prefix && (ret = changelist_prefix(cl)) != 0)
1399                 goto error;
1400
1401         /*
1402          * Execute the corresponding ioctl() to set this property.
1403          */
1404         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
1405
1406         if (zcmd_write_src_nvlist(hdl, &zc, nvl) != 0)
1407                 goto error;
1408
1409         ret = zfs_ioctl(hdl, ZFS_IOC_SET_PROP, &zc);
1410
1411         if (ret != 0) {
1412                 zfs_setprop_error(hdl, prop, errno, errbuf);
1413                 if (added_resv && errno == ENOSPC) {
1414                         /* clean up the volsize property we tried to set */
1415                         uint64_t old_volsize = zfs_prop_get_int(zhp,
1416                             ZFS_PROP_VOLSIZE);
1417                         nvlist_free(nvl);
1418                         zcmd_free_nvlists(&zc);
1419                         if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0) != 0)
1420                                 goto error;
1421                         if (nvlist_add_uint64(nvl,
1422                             zfs_prop_to_name(ZFS_PROP_VOLSIZE),
1423                             old_volsize) != 0)
1424                                 goto error;
1425                         if (zcmd_write_src_nvlist(hdl, &zc, nvl) != 0)
1426                                 goto error;
1427                         (void) zfs_ioctl(hdl, ZFS_IOC_SET_PROP, &zc);
1428                 }
1429         } else {
1430                 if (do_prefix)
1431                         ret = changelist_postfix(cl);
1432
1433                 if (ret == 0) {
1434                         /*
1435                          * Refresh the statistics so the new property
1436                          * value is reflected.
1437                          */
1438                         (void) get_stats(zhp);
1439
1440                         /*
1441                          * Remount the filesystem to propagate the change
1442                          * if one of the options handled by the generic
1443                          * Linux namespace layer has been modified.
1444                          */
1445                         if (zfs_is_namespace_prop(prop) &&
1446                             zfs_is_mounted(zhp, NULL))
1447                                 ret = zfs_mount(zhp, MNTOPT_REMOUNT, 0);
1448                 }
1449         }
1450
1451 error:
1452         nvlist_free(nvl);
1453         zcmd_free_nvlists(&zc);
1454         if (cl)
1455                 changelist_free(cl);
1456         return (ret);
1457 }
1458
1459 /*
1460  * Given a property, inherit the value from the parent dataset, or if received
1461  * is TRUE, revert to the received value, if any.
1462  */
1463 int
1464 zfs_prop_inherit(zfs_handle_t *zhp, const char *propname, boolean_t received)
1465 {
1466         zfs_cmd_t zc = { "\0", "\0", "\0", "\0", 0 };
1467         int ret;
1468         prop_changelist_t *cl;
1469         libzfs_handle_t *hdl = zhp->zfs_hdl;
1470         char errbuf[1024];
1471         zfs_prop_t prop;
1472
1473         (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
1474             "cannot inherit %s for '%s'"), propname, zhp->zfs_name);
1475
1476         zc.zc_cookie = received;
1477         if ((prop = zfs_name_to_prop(propname)) == ZPROP_INVAL) {
1478                 /*
1479                  * For user properties, the amount of work we have to do is very
1480                  * small, so just do it here.
1481                  */
1482                 if (!zfs_prop_user(propname)) {
1483                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1484                             "invalid property"));
1485                         return (zfs_error(hdl, EZFS_BADPROP, errbuf));
1486                 }
1487
1488                 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
1489                 (void) strlcpy(zc.zc_value, propname, sizeof (zc.zc_value));
1490
1491                 if (zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_INHERIT_PROP, &zc) != 0)
1492                         return (zfs_standard_error(hdl, errno, errbuf));
1493
1494                 return (0);
1495         }
1496
1497         /*
1498          * Verify that this property is inheritable.
1499          */
1500         if (zfs_prop_readonly(prop))
1501                 return (zfs_error(hdl, EZFS_PROPREADONLY, errbuf));
1502
1503         if (!zfs_prop_inheritable(prop) && !received)
1504                 return (zfs_error(hdl, EZFS_PROPNONINHERIT, errbuf));
1505
1506         /*
1507          * Check to see if the value applies to this type
1508          */
1509         if (!zfs_prop_valid_for_type(prop, zhp->zfs_type))
1510                 return (zfs_error(hdl, EZFS_PROPTYPE, errbuf));
1511
1512         /*
1513          * Normalize the name, to get rid of shorthand abbreviations.
1514          */
1515         propname = zfs_prop_to_name(prop);
1516         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
1517         (void) strlcpy(zc.zc_value, propname, sizeof (zc.zc_value));
1518
1519         if (prop == ZFS_PROP_MOUNTPOINT && getzoneid() == GLOBAL_ZONEID &&
1520             zfs_prop_get_int(zhp, ZFS_PROP_ZONED)) {
1521                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1522                     "dataset is used in a non-global zone"));
1523                 return (zfs_error(hdl, EZFS_ZONED, errbuf));
1524         }
1525
1526         /*
1527          * Determine datasets which will be affected by this change, if any.
1528          */
1529         if ((cl = changelist_gather(zhp, prop, 0, 0)) == NULL)
1530                 return (-1);
1531
1532         if (prop == ZFS_PROP_MOUNTPOINT && changelist_haszonedchild(cl)) {
1533                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1534                     "child dataset with inherited mountpoint is used "
1535                     "in a non-global zone"));
1536                 ret = zfs_error(hdl, EZFS_ZONED, errbuf);
1537                 goto error;
1538         }
1539
1540         if ((ret = changelist_prefix(cl)) != 0)
1541                 goto error;
1542
1543         if ((ret = zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_INHERIT_PROP, &zc)) != 0) {
1544                 return (zfs_standard_error(hdl, errno, errbuf));
1545         } else {
1546
1547                 if ((ret = changelist_postfix(cl)) != 0)
1548                         goto error;
1549
1550                 /*
1551                  * Refresh the statistics so the new property is reflected.
1552                  */
1553                 (void) get_stats(zhp);
1554         }
1555
1556 error:
1557         changelist_free(cl);
1558         return (ret);
1559 }
1560
1561 /*
1562  * True DSL properties are stored in an nvlist.  The following two functions
1563  * extract them appropriately.
1564  */
1565 uint64_t
1566 getprop_uint64(zfs_handle_t *zhp, zfs_prop_t prop, char **source)
1567 {
1568         nvlist_t *nv;
1569         uint64_t value;
1570
1571         *source = NULL;
1572         if (nvlist_lookup_nvlist(zhp->zfs_props,
1573             zfs_prop_to_name(prop), &nv) == 0) {
1574                 verify(nvlist_lookup_uint64(nv, ZPROP_VALUE, &value) == 0);
1575                 (void) nvlist_lookup_string(nv, ZPROP_SOURCE, source);
1576         } else {
1577                 verify(!zhp->zfs_props_table ||
1578                     zhp->zfs_props_table[prop] == B_TRUE);
1579                 value = zfs_prop_default_numeric(prop);
1580                 *source = "";
1581         }
1582
1583         return (value);
1584 }
1585
1586 static char *
1587 getprop_string(zfs_handle_t *zhp, zfs_prop_t prop, char **source)
1588 {
1589         nvlist_t *nv;
1590         char *value;
1591
1592         *source = NULL;
1593         if (nvlist_lookup_nvlist(zhp->zfs_props,
1594             zfs_prop_to_name(prop), &nv) == 0) {
1595                 verify(nvlist_lookup_string(nv, ZPROP_VALUE, &value) == 0);
1596                 (void) nvlist_lookup_string(nv, ZPROP_SOURCE, source);
1597         } else {
1598                 verify(!zhp->zfs_props_table ||
1599                     zhp->zfs_props_table[prop] == B_TRUE);
1600                 if ((value = (char *)zfs_prop_default_string(prop)) == NULL)
1601                         value = "";
1602                 *source = "";
1603         }
1604
1605         return (value);
1606 }
1607
1608 static boolean_t
1609 zfs_is_recvd_props_mode(zfs_handle_t *zhp)
1610 {
1611         return (zhp->zfs_props == zhp->zfs_recvd_props);
1612 }
1613
1614 static void
1615 zfs_set_recvd_props_mode(zfs_handle_t *zhp, uint64_t *cookie)
1616 {
1617         *cookie = (uint64_t)(uintptr_t)zhp->zfs_props;
1618         zhp->zfs_props = zhp->zfs_recvd_props;
1619 }
1620
1621 static void
1622 zfs_unset_recvd_props_mode(zfs_handle_t *zhp, uint64_t *cookie)
1623 {
1624         zhp->zfs_props = (nvlist_t *)(uintptr_t)*cookie;
1625         *cookie = 0;
1626 }
1627
1628 /*
1629  * Internal function for getting a numeric property.  Both zfs_prop_get() and
1630  * zfs_prop_get_int() are built using this interface.
1631  *
1632  * Certain properties can be overridden using 'mount -o'.  In this case, scan
1633  * the contents of the /etc/mtab entry, searching for the appropriate options.
1634  * If they differ from the on-disk values, report the current values and mark
1635  * the source "temporary".
1636  */
1637 static int
1638 get_numeric_property(zfs_handle_t *zhp, zfs_prop_t prop, zprop_source_t *src,
1639     char **source, uint64_t *val)
1640 {
1641         zfs_cmd_t zc = { "\0", "\0", "\0", "\0", 0 };
1642         nvlist_t *zplprops = NULL;
1643         struct mnttab mnt;
1644         char *mntopt_on = NULL;
1645         char *mntopt_off = NULL;
1646         boolean_t received = zfs_is_recvd_props_mode(zhp);
1647
1648         *source = NULL;
1649
1650         switch (prop) {
1651         case ZFS_PROP_ATIME:
1652                 mntopt_on = MNTOPT_ATIME;
1653                 mntopt_off = MNTOPT_NOATIME;
1654                 break;
1655
1656         case ZFS_PROP_DEVICES:
1657                 mntopt_on = MNTOPT_DEVICES;
1658                 mntopt_off = MNTOPT_NODEVICES;
1659                 break;
1660
1661         case ZFS_PROP_EXEC:
1662                 mntopt_on = MNTOPT_EXEC;
1663                 mntopt_off = MNTOPT_NOEXEC;
1664                 break;
1665
1666         case ZFS_PROP_READONLY:
1667                 mntopt_on = MNTOPT_RO;
1668                 mntopt_off = MNTOPT_RW;
1669                 break;
1670
1671         case ZFS_PROP_SETUID:
1672                 mntopt_on = MNTOPT_SETUID;
1673                 mntopt_off = MNTOPT_NOSETUID;
1674                 break;
1675
1676         case ZFS_PROP_XATTR:
1677                 mntopt_on = MNTOPT_XATTR;
1678                 mntopt_off = MNTOPT_NOXATTR;
1679                 break;
1680
1681         case ZFS_PROP_NBMAND:
1682                 mntopt_on = MNTOPT_NBMAND;
1683                 mntopt_off = MNTOPT_NONBMAND;
1684                 break;
1685         default:
1686                 break;
1687         }
1688
1689         /*
1690          * Because looking up the mount options is potentially expensive
1691          * (iterating over all of /etc/mtab), we defer its calculation until
1692          * we're looking up a property which requires its presence.
1693          */
1694         if (!zhp->zfs_mntcheck &&
1695             (mntopt_on != NULL || prop == ZFS_PROP_MOUNTED)) {
1696                 libzfs_handle_t *hdl = zhp->zfs_hdl;
1697                 struct mnttab entry;
1698
1699                 if (libzfs_mnttab_find(hdl, zhp->zfs_name, &entry) == 0) {
1700                         zhp->zfs_mntopts = zfs_strdup(hdl,
1701                             entry.mnt_mntopts);
1702                         if (zhp->zfs_mntopts == NULL)
1703                                 return (-1);
1704                 }
1705
1706                 zhp->zfs_mntcheck = B_TRUE;
1707         }
1708
1709         if (zhp->zfs_mntopts == NULL)
1710                 mnt.mnt_mntopts = "";
1711         else
1712                 mnt.mnt_mntopts = zhp->zfs_mntopts;
1713
1714         switch (prop) {
1715         case ZFS_PROP_ATIME:
1716         case ZFS_PROP_DEVICES:
1717         case ZFS_PROP_EXEC:
1718         case ZFS_PROP_READONLY:
1719         case ZFS_PROP_SETUID:
1720         case ZFS_PROP_XATTR:
1721         case ZFS_PROP_NBMAND:
1722                 *val = getprop_uint64(zhp, prop, source);
1723
1724                 if (received)
1725                         break;
1726
1727                 if (hasmntopt(&mnt, mntopt_on) && !*val) {
1728                         *val = B_TRUE;
1729                         if (src)
1730                                 *src = ZPROP_SRC_TEMPORARY;
1731                 } else if (hasmntopt(&mnt, mntopt_off) && *val) {
1732                         *val = B_FALSE;
1733                         if (src)
1734                                 *src = ZPROP_SRC_TEMPORARY;
1735                 }
1736                 break;
1737
1738         case ZFS_PROP_CANMOUNT:
1739         case ZFS_PROP_VOLSIZE:
1740         case ZFS_PROP_QUOTA:
1741         case ZFS_PROP_REFQUOTA:
1742         case ZFS_PROP_RESERVATION:
1743         case ZFS_PROP_REFRESERVATION:
1744                 *val = getprop_uint64(zhp, prop, source);
1745
1746                 if (*source == NULL) {
1747                         /* not default, must be local */
1748                         *source = zhp->zfs_name;
1749                 }
1750                 break;
1751
1752         case ZFS_PROP_MOUNTED:
1753                 *val = (zhp->zfs_mntopts != NULL);
1754                 break;
1755
1756         case ZFS_PROP_NUMCLONES:
1757                 *val = zhp->zfs_dmustats.dds_num_clones;
1758                 break;
1759
1760         case ZFS_PROP_VERSION:
1761         case ZFS_PROP_NORMALIZE:
1762         case ZFS_PROP_UTF8ONLY:
1763         case ZFS_PROP_CASE:
1764                 if (!zfs_prop_valid_for_type(prop, zhp->zfs_head_type) ||
1765                     zcmd_alloc_dst_nvlist(zhp->zfs_hdl, &zc, 0) != 0)
1766                         return (-1);
1767                 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
1768                 if (zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_OBJSET_ZPLPROPS, &zc)) {
1769                         zcmd_free_nvlists(&zc);
1770                         return (-1);
1771                 }
1772                 if (zcmd_read_dst_nvlist(zhp->zfs_hdl, &zc, &zplprops) != 0 ||
1773                     nvlist_lookup_uint64(zplprops, zfs_prop_to_name(prop),
1774                     val) != 0) {
1775                         zcmd_free_nvlists(&zc);
1776                         return (-1);
1777                 }
1778                 if (zplprops)
1779                         nvlist_free(zplprops);
1780                 zcmd_free_nvlists(&zc);
1781                 break;
1782
1783         default:
1784                 switch (zfs_prop_get_type(prop)) {
1785                 case PROP_TYPE_NUMBER:
1786                 case PROP_TYPE_INDEX:
1787                         *val = getprop_uint64(zhp, prop, source);
1788                         /*
1789                          * If we tried to use a default value for a
1790                          * readonly property, it means that it was not
1791                          * present.
1792                          */
1793                         if (zfs_prop_readonly(prop) &&
1794                             *source != NULL && (*source)[0] == '\0') {
1795                                 *source = NULL;
1796                         }
1797                         break;
1798
1799                 case PROP_TYPE_STRING:
1800                 default:
1801                         zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN,
1802                             "cannot get non-numeric property"));
1803                         return (zfs_error(zhp->zfs_hdl, EZFS_BADPROP,
1804                             dgettext(TEXT_DOMAIN, "internal error")));
1805                 }
1806         }
1807
1808         return (0);
1809 }
1810
1811 /*
1812  * Calculate the source type, given the raw source string.
1813  */
1814 static void
1815 get_source(zfs_handle_t *zhp, zprop_source_t *srctype, char *source,
1816     char *statbuf, size_t statlen)
1817 {
1818         if (statbuf == NULL || *srctype == ZPROP_SRC_TEMPORARY)
1819                 return;
1820
1821         if (source == NULL) {
1822                 *srctype = ZPROP_SRC_NONE;
1823         } else if (source[0] == '\0') {
1824                 *srctype = ZPROP_SRC_DEFAULT;
1825         } else if (strstr(source, ZPROP_SOURCE_VAL_RECVD) != NULL) {
1826                 *srctype = ZPROP_SRC_RECEIVED;
1827         } else {
1828                 if (strcmp(source, zhp->zfs_name) == 0) {
1829                         *srctype = ZPROP_SRC_LOCAL;
1830                 } else {
1831                         (void) strlcpy(statbuf, source, statlen);
1832                         *srctype = ZPROP_SRC_INHERITED;
1833                 }
1834         }
1835
1836 }
1837
1838 int
1839 zfs_prop_get_recvd(zfs_handle_t *zhp, const char *propname, char *propbuf,
1840     size_t proplen, boolean_t literal)
1841 {
1842         zfs_prop_t prop;
1843         int err = 0;
1844
1845         if (zhp->zfs_recvd_props == NULL)
1846                 if (get_recvd_props_ioctl(zhp) != 0)
1847                         return (-1);
1848
1849         prop = zfs_name_to_prop(propname);
1850
1851         if (prop != ZPROP_INVAL) {
1852                 uint64_t cookie;
1853                 if (!nvlist_exists(zhp->zfs_recvd_props, propname))
1854                         return (-1);
1855                 zfs_set_recvd_props_mode(zhp, &cookie);
1856                 err = zfs_prop_get(zhp, prop, propbuf, proplen,
1857                     NULL, NULL, 0, literal);
1858                 zfs_unset_recvd_props_mode(zhp, &cookie);
1859         } else if (zfs_prop_userquota(propname)) {
1860                 return (-1);
1861         } else {
1862                 nvlist_t *propval;
1863                 char *recvdval;
1864                 if (nvlist_lookup_nvlist(zhp->zfs_recvd_props,
1865                     propname, &propval) != 0)
1866                         return (-1);
1867                 verify(nvlist_lookup_string(propval, ZPROP_VALUE,
1868                     &recvdval) == 0);
1869                 (void) strlcpy(propbuf, recvdval, proplen);
1870         }
1871
1872         return (err == 0 ? 0 : -1);
1873 }
1874
1875 /*
1876  * Retrieve a property from the given object.  If 'literal' is specified, then
1877  * numbers are left as exact values.  Otherwise, numbers are converted to a
1878  * human-readable form.
1879  *
1880  * Returns 0 on success, or -1 on error.
1881  */
1882 int
1883 zfs_prop_get(zfs_handle_t *zhp, zfs_prop_t prop, char *propbuf, size_t proplen,
1884     zprop_source_t *src, char *statbuf, size_t statlen, boolean_t literal)
1885 {
1886         char *source = NULL;
1887         uint64_t val;
1888         char *str;
1889         const char *strval;
1890         boolean_t received = zfs_is_recvd_props_mode(zhp);
1891
1892         /*
1893          * Check to see if this property applies to our object
1894          */
1895         if (!zfs_prop_valid_for_type(prop, zhp->zfs_type))
1896                 return (-1);
1897
1898         if (received && zfs_prop_readonly(prop))
1899                 return (-1);
1900
1901         if (src)
1902                 *src = ZPROP_SRC_NONE;
1903
1904         switch (prop) {
1905         case ZFS_PROP_CREATION:
1906                 /*
1907                  * 'creation' is a time_t stored in the statistics.  We convert
1908                  * this into a string unless 'literal' is specified.
1909                  */
1910                 {
1911                         val = getprop_uint64(zhp, prop, &source);
1912                         time_t time = (time_t)val;
1913                         struct tm t;
1914
1915                         if (literal ||
1916                             localtime_r(&time, &t) == NULL ||
1917                             strftime(propbuf, proplen, "%a %b %e %k:%M %Y",
1918                             &t) == 0)
1919                                 (void) snprintf(propbuf, proplen, "%llu", (u_longlong_t) val);
1920                 }
1921                 break;
1922
1923         case ZFS_PROP_MOUNTPOINT:
1924                 /*
1925                  * Getting the precise mountpoint can be tricky.
1926                  *
1927                  *  - for 'none' or 'legacy', return those values.
1928                  *  - for inherited mountpoints, we want to take everything
1929                  *    after our ancestor and append it to the inherited value.
1930                  *
1931                  * If the pool has an alternate root, we want to prepend that
1932                  * root to any values we return.
1933                  */
1934
1935                 str = getprop_string(zhp, prop, &source);
1936
1937                 if (str[0] == '/') {
1938                         char buf[MAXPATHLEN];
1939                         char *root = buf;
1940                         const char *relpath;
1941
1942                         /*
1943                          * If we inherit the mountpoint, even from a dataset
1944                          * with a received value, the source will be the path of
1945                          * the dataset we inherit from. If source is
1946                          * ZPROP_SOURCE_VAL_RECVD, the received value is not
1947                          * inherited.
1948                          */
1949                         if (strcmp(source, ZPROP_SOURCE_VAL_RECVD) == 0) {
1950                                 relpath = "";
1951                         } else {
1952                                 relpath = zhp->zfs_name + strlen(source);
1953                                 if (relpath[0] == '/')
1954                                         relpath++;
1955                         }
1956
1957                         if ((zpool_get_prop(zhp->zpool_hdl,
1958                             ZPOOL_PROP_ALTROOT, buf, MAXPATHLEN, NULL)) ||
1959                             (strcmp(root, "-") == 0))
1960                                 root[0] = '\0';
1961                         /*
1962                          * Special case an alternate root of '/'. This will
1963                          * avoid having multiple leading slashes in the
1964                          * mountpoint path.
1965                          */
1966                         if (strcmp(root, "/") == 0)
1967                                 root++;
1968
1969                         /*
1970                          * If the mountpoint is '/' then skip over this
1971                          * if we are obtaining either an alternate root or
1972                          * an inherited mountpoint.
1973                          */
1974                         if (str[1] == '\0' && (root[0] != '\0' ||
1975                             relpath[0] != '\0'))
1976                                 str++;
1977
1978                         if (relpath[0] == '\0')
1979                                 (void) snprintf(propbuf, proplen, "%s%s",
1980                                     root, str);
1981                         else
1982                                 (void) snprintf(propbuf, proplen, "%s%s%s%s",
1983                                     root, str, relpath[0] == '@' ? "" : "/",
1984                                     relpath);
1985                 } else {
1986                         /* 'legacy' or 'none' */
1987                         (void) strlcpy(propbuf, str, proplen);
1988                 }
1989
1990                 break;
1991
1992         case ZFS_PROP_ORIGIN:
1993                 (void) strlcpy(propbuf, getprop_string(zhp, prop, &source),
1994                     proplen);
1995                 /*
1996                  * If there is no parent at all, return failure to indicate that
1997                  * it doesn't apply to this dataset.
1998                  */
1999                 if (propbuf[0] == '\0')
2000                         return (-1);
2001                 break;
2002
2003         case ZFS_PROP_QUOTA:
2004         case ZFS_PROP_REFQUOTA:
2005         case ZFS_PROP_RESERVATION:
2006         case ZFS_PROP_REFRESERVATION:
2007
2008                 if (get_numeric_property(zhp, prop, src, &source, &val) != 0)
2009                         return (-1);
2010
2011                 /*
2012                  * If quota or reservation is 0, we translate this into 'none'
2013                  * (unless literal is set), and indicate that it's the default
2014                  * value.  Otherwise, we print the number nicely and indicate
2015                  * that its set locally.
2016                  */
2017                 if (val == 0) {
2018                         if (literal)
2019                                 (void) strlcpy(propbuf, "0", proplen);
2020                         else
2021                                 (void) strlcpy(propbuf, "none", proplen);
2022                 } else {
2023                         if (literal)
2024                                 (void) snprintf(propbuf, proplen, "%llu",
2025                                     (u_longlong_t)val);
2026                         else
2027                                 zfs_nicenum(val, propbuf, proplen);
2028                 }
2029                 break;
2030
2031         case ZFS_PROP_REFRATIO:
2032         case ZFS_PROP_COMPRESSRATIO:
2033                 if (get_numeric_property(zhp, prop, src, &source, &val) != 0)
2034                         return (-1);
2035                 (void) snprintf(propbuf, proplen, "%llu.%02llux",
2036                     (u_longlong_t)(val / 100),
2037                     (u_longlong_t)(val % 100));
2038                 break;
2039
2040         case ZFS_PROP_TYPE:
2041                 switch (zhp->zfs_type) {
2042                 case ZFS_TYPE_FILESYSTEM:
2043                         str = "filesystem";
2044                         break;
2045                 case ZFS_TYPE_VOLUME:
2046                         str = "volume";
2047                         break;
2048                 case ZFS_TYPE_SNAPSHOT:
2049                         str = "snapshot";
2050                         break;
2051                 default:
2052                         abort();
2053                 }
2054                 (void) snprintf(propbuf, proplen, "%s", str);
2055                 break;
2056
2057         case ZFS_PROP_MOUNTED:
2058                 /*
2059                  * The 'mounted' property is a pseudo-property that described
2060                  * whether the filesystem is currently mounted.  Even though
2061                  * it's a boolean value, the typical values of "on" and "off"
2062                  * don't make sense, so we translate to "yes" and "no".
2063                  */
2064                 if (get_numeric_property(zhp, ZFS_PROP_MOUNTED,
2065                     src, &source, &val) != 0)
2066                         return (-1);
2067                 if (val)
2068                         (void) strlcpy(propbuf, "yes", proplen);
2069                 else
2070                         (void) strlcpy(propbuf, "no", proplen);
2071                 break;
2072
2073         case ZFS_PROP_NAME:
2074                 /*
2075                  * The 'name' property is a pseudo-property derived from the
2076                  * dataset name.  It is presented as a real property to simplify
2077                  * consumers.
2078                  */
2079                 (void) strlcpy(propbuf, zhp->zfs_name, proplen);
2080                 break;
2081
2082         case ZFS_PROP_MLSLABEL:
2083                 {
2084 #ifdef HAVE_MLSLABEL
2085                         m_label_t *new_sl = NULL;
2086                         char *ascii = NULL;     /* human readable label */
2087
2088                         (void) strlcpy(propbuf,
2089                             getprop_string(zhp, prop, &source), proplen);
2090
2091                         if (literal || (strcasecmp(propbuf,
2092                             ZFS_MLSLABEL_DEFAULT) == 0))
2093                                 break;
2094
2095                         /*
2096                          * Try to translate the internal hex string to
2097                          * human-readable output.  If there are any
2098                          * problems just use the hex string.
2099                          */
2100
2101                         if (str_to_label(propbuf, &new_sl, MAC_LABEL,
2102                             L_NO_CORRECTION, NULL) == -1) {
2103                                 m_label_free(new_sl);
2104                                 break;
2105                         }
2106
2107                         if (label_to_str(new_sl, &ascii, M_LABEL,
2108                             DEF_NAMES) != 0) {
2109                                 if (ascii)
2110                                         free(ascii);
2111                                 m_label_free(new_sl);
2112                                 break;
2113                         }
2114                         m_label_free(new_sl);
2115
2116                         (void) strlcpy(propbuf, ascii, proplen);
2117                         free(ascii);
2118 #else
2119                         (void) strlcpy(propbuf,
2120                             getprop_string(zhp, prop, &source), proplen);
2121 #endif /* HAVE_MLSLABEL */
2122                 }
2123                 break;
2124
2125         default:
2126                 switch (zfs_prop_get_type(prop)) {
2127                 case PROP_TYPE_NUMBER:
2128                         if (get_numeric_property(zhp, prop, src,
2129                             &source, &val) != 0)
2130                                 return (-1);
2131                         if (literal)
2132                                 (void) snprintf(propbuf, proplen, "%llu",
2133                                     (u_longlong_t)val);
2134                         else
2135                                 zfs_nicenum(val, propbuf, proplen);
2136                         break;
2137
2138                 case PROP_TYPE_STRING:
2139                         (void) strlcpy(propbuf,
2140                             getprop_string(zhp, prop, &source), proplen);
2141                         break;
2142
2143                 case PROP_TYPE_INDEX:
2144                         if (get_numeric_property(zhp, prop, src,
2145                             &source, &val) != 0)
2146                                 return (-1);
2147                         if (zfs_prop_index_to_string(prop, val, &strval) != 0)
2148                                 return (-1);
2149                         (void) strlcpy(propbuf, strval, proplen);
2150                         break;
2151
2152                 default:
2153                         abort();
2154                 }
2155         }
2156
2157         get_source(zhp, src, source, statbuf, statlen);
2158
2159         return (0);
2160 }
2161
2162 /*
2163  * Utility function to get the given numeric property.  Does no validation that
2164  * the given property is the appropriate type; should only be used with
2165  * hard-coded property types.
2166  */
2167 uint64_t
2168 zfs_prop_get_int(zfs_handle_t *zhp, zfs_prop_t prop)
2169 {
2170         char *source;
2171         uint64_t val;
2172
2173         (void) get_numeric_property(zhp, prop, NULL, &source, &val);
2174
2175         return (val);
2176 }
2177
2178 int
2179 zfs_prop_set_int(zfs_handle_t *zhp, zfs_prop_t prop, uint64_t val)
2180 {
2181         char buf[64];
2182
2183         (void) snprintf(buf, sizeof (buf), "%llu", (longlong_t)val);
2184         return (zfs_prop_set(zhp, zfs_prop_to_name(prop), buf));
2185 }
2186
2187 /*
2188  * Similar to zfs_prop_get(), but returns the value as an integer.
2189  */
2190 int
2191 zfs_prop_get_numeric(zfs_handle_t *zhp, zfs_prop_t prop, uint64_t *value,
2192     zprop_source_t *src, char *statbuf, size_t statlen)
2193 {
2194         char *source;
2195
2196         /*
2197          * Check to see if this property applies to our object
2198          */
2199         if (!zfs_prop_valid_for_type(prop, zhp->zfs_type)) {
2200                 return (zfs_error_fmt(zhp->zfs_hdl, EZFS_PROPTYPE,
2201                     dgettext(TEXT_DOMAIN, "cannot get property '%s'"),
2202                     zfs_prop_to_name(prop)));
2203         }
2204
2205         if (src)
2206                 *src = ZPROP_SRC_NONE;
2207
2208         if (get_numeric_property(zhp, prop, src, &source, value) != 0)
2209                 return (-1);
2210
2211         get_source(zhp, src, source, statbuf, statlen);
2212
2213         return (0);
2214 }
2215
2216 #ifdef HAVE_IDMAP
2217 static int
2218 idmap_id_to_numeric_domain_rid(uid_t id, boolean_t isuser,
2219     char **domainp, idmap_rid_t *ridp)
2220 {
2221         idmap_get_handle_t *get_hdl = NULL;
2222         idmap_stat status;
2223         int err = EINVAL;
2224
2225         if (idmap_get_create(&get_hdl) != IDMAP_SUCCESS)
2226                 goto out;
2227
2228         if (isuser) {
2229                 err = idmap_get_sidbyuid(get_hdl, id,
2230                     IDMAP_REQ_FLG_USE_CACHE, domainp, ridp, &status);
2231         } else {
2232                 err = idmap_get_sidbygid(get_hdl, id,
2233                     IDMAP_REQ_FLG_USE_CACHE, domainp, ridp, &status);
2234         }
2235         if (err == IDMAP_SUCCESS &&
2236             idmap_get_mappings(get_hdl) == IDMAP_SUCCESS &&
2237             status == IDMAP_SUCCESS)
2238                 err = 0;
2239         else
2240                 err = EINVAL;
2241 out:
2242         if (get_hdl)
2243                 idmap_get_destroy(get_hdl);
2244         return (err);
2245 }
2246 #endif /* HAVE_IDMAP */
2247
2248 /*
2249  * convert the propname into parameters needed by kernel
2250  * Eg: userquota@ahrens -> ZFS_PROP_USERQUOTA, "", 126829
2251  * Eg: userused@matt@domain -> ZFS_PROP_USERUSED, "S-1-123-456", 789
2252  */
2253 static int
2254 userquota_propname_decode(const char *propname, boolean_t zoned,
2255     zfs_userquota_prop_t *typep, char *domain, int domainlen, uint64_t *ridp)
2256 {
2257         zfs_userquota_prop_t type;
2258         char *cp, *end;
2259         char *numericsid = NULL;
2260         boolean_t isuser;
2261
2262         domain[0] = '\0';
2263
2264         /* Figure out the property type ({user|group}{quota|space}) */
2265         for (type = 0; type < ZFS_NUM_USERQUOTA_PROPS; type++) {
2266                 if (strncmp(propname, zfs_userquota_prop_prefixes[type],
2267                     strlen(zfs_userquota_prop_prefixes[type])) == 0)
2268                         break;
2269         }
2270         if (type == ZFS_NUM_USERQUOTA_PROPS)
2271                 return (EINVAL);
2272         *typep = type;
2273
2274         isuser = (type == ZFS_PROP_USERQUOTA ||
2275             type == ZFS_PROP_USERUSED);
2276
2277         cp = strchr(propname, '@') + 1;
2278
2279         if (strchr(cp, '@')) {
2280 #ifdef HAVE_IDMAP
2281                 /*
2282                  * It's a SID name (eg "user@domain") that needs to be
2283                  * turned into S-1-domainID-RID.
2284                  */
2285                 directory_error_t e;
2286                 if (zoned && getzoneid() == GLOBAL_ZONEID)
2287                         return (ENOENT);
2288                 if (isuser) {
2289                         e = directory_sid_from_user_name(NULL,
2290                             cp, &numericsid);
2291                 } else {
2292                         e = directory_sid_from_group_name(NULL,
2293                             cp, &numericsid);
2294                 }
2295                 if (e != NULL) {
2296                         directory_error_free(e);
2297                         return (ENOENT);
2298                 }
2299                 if (numericsid == NULL)
2300                         return (ENOENT);
2301                 cp = numericsid;
2302                 /* will be further decoded below */
2303 #else
2304                 return (ENOSYS);
2305 #endif /* HAVE_IDMAP */
2306         }
2307
2308         if (strncmp(cp, "S-1-", 4) == 0) {
2309                 /* It's a numeric SID (eg "S-1-234-567-89") */
2310                 (void) strlcpy(domain, cp, domainlen);
2311                 cp = strrchr(domain, '-');
2312                 *cp = '\0';
2313                 cp++;
2314
2315                 errno = 0;
2316                 *ridp = strtoull(cp, &end, 10);
2317                 if (numericsid) {
2318                         free(numericsid);
2319                         numericsid = NULL;
2320                 }
2321                 if (errno != 0 || *end != '\0')
2322                         return (EINVAL);
2323         } else if (!isdigit(*cp)) {
2324                 /*
2325                  * It's a user/group name (eg "user") that needs to be
2326                  * turned into a uid/gid
2327                  */
2328                 if (zoned && getzoneid() == GLOBAL_ZONEID)
2329                         return (ENOENT);
2330                 if (isuser) {
2331                         struct passwd *pw;
2332                         pw = getpwnam(cp);
2333                         if (pw == NULL)
2334                                 return (ENOENT);
2335                         *ridp = pw->pw_uid;
2336                 } else {
2337                         struct group *gr;
2338                         gr = getgrnam(cp);
2339                         if (gr == NULL)
2340                                 return (ENOENT);
2341                         *ridp = gr->gr_gid;
2342                 }
2343         } else {
2344 #ifdef HAVE_IDMAP
2345                 /* It's a user/group ID (eg "12345"). */
2346                 uid_t id = strtoul(cp, &end, 10);
2347                 idmap_rid_t rid;
2348                 char *mapdomain;
2349
2350                 if (*end != '\0')
2351                         return (EINVAL);
2352                 if (id > MAXUID) {
2353                         /* It's an ephemeral ID. */
2354                         if (idmap_id_to_numeric_domain_rid(id, isuser,
2355                             &mapdomain, &rid) != 0)
2356                                 return (ENOENT);
2357                         (void) strlcpy(domain, mapdomain, domainlen);
2358                         *ridp = rid;
2359                 } else {
2360                         *ridp = id;
2361                 }
2362 #else
2363                 return (ENOSYS);
2364 #endif /* HAVE_IDMAP */
2365         }
2366
2367         ASSERT3P(numericsid, ==, NULL);
2368         return (0);
2369 }
2370
2371 static int
2372 zfs_prop_get_userquota_common(zfs_handle_t *zhp, const char *propname,
2373     uint64_t *propvalue, zfs_userquota_prop_t *typep)
2374 {
2375         int err;
2376         zfs_cmd_t zc = { "\0", "\0", "\0", "\0", 0 };
2377
2378         (void) strncpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
2379
2380         err = userquota_propname_decode(propname,
2381             zfs_prop_get_int(zhp, ZFS_PROP_ZONED),
2382             typep, zc.zc_value, sizeof (zc.zc_value), &zc.zc_guid);
2383         zc.zc_objset_type = *typep;
2384         if (err)
2385                 return (err);
2386
2387         err = ioctl(zhp->zfs_hdl->libzfs_fd, ZFS_IOC_USERSPACE_ONE, &zc);
2388         if (err)
2389                 return (err);
2390
2391         *propvalue = zc.zc_cookie;
2392         return (0);
2393 }
2394
2395 int
2396 zfs_prop_get_userquota_int(zfs_handle_t *zhp, const char *propname,
2397     uint64_t *propvalue)
2398 {
2399         zfs_userquota_prop_t type;
2400
2401         return (zfs_prop_get_userquota_common(zhp, propname, propvalue,
2402             &type));
2403 }
2404
2405 int
2406 zfs_prop_get_userquota(zfs_handle_t *zhp, const char *propname,
2407     char *propbuf, int proplen, boolean_t literal)
2408 {
2409         int err;
2410         uint64_t propvalue;
2411         zfs_userquota_prop_t type;
2412
2413         err = zfs_prop_get_userquota_common(zhp, propname, &propvalue,
2414             &type);
2415
2416         if (err)
2417                 return (err);
2418
2419         if (literal) {
2420                 (void) snprintf(propbuf, proplen, "%llu",
2421                                (u_longlong_t)propvalue);
2422         } else if (propvalue == 0 &&
2423             (type == ZFS_PROP_USERQUOTA || type == ZFS_PROP_GROUPQUOTA)) {
2424                 (void) strlcpy(propbuf, "none", proplen);
2425         } else {
2426                 zfs_nicenum(propvalue, propbuf, proplen);
2427         }
2428         return (0);
2429 }
2430
2431 /*
2432  * Returns the name of the given zfs handle.
2433  */
2434 const char *
2435 zfs_get_name(const zfs_handle_t *zhp)
2436 {
2437         return (zhp->zfs_name);
2438 }
2439
2440 /*
2441  * Returns the type of the given zfs handle.
2442  */
2443 zfs_type_t
2444 zfs_get_type(const zfs_handle_t *zhp)
2445 {
2446         return (zhp->zfs_type);
2447 }
2448
2449 static int
2450 zfs_do_list_ioctl(zfs_handle_t *zhp, int arg, zfs_cmd_t *zc)
2451 {
2452         int rc;
2453         uint64_t        orig_cookie;
2454
2455         orig_cookie = zc->zc_cookie;
2456 top:
2457         (void) strlcpy(zc->zc_name, zhp->zfs_name, sizeof (zc->zc_name));
2458         rc = ioctl(zhp->zfs_hdl->libzfs_fd, arg, zc);
2459
2460         if (rc == -1) {
2461                 switch (errno) {
2462                 case ENOMEM:
2463                         /* expand nvlist memory and try again */
2464                         if (zcmd_expand_dst_nvlist(zhp->zfs_hdl, zc) != 0) {
2465                                 zcmd_free_nvlists(zc);
2466                                 return (-1);
2467                         }
2468                         zc->zc_cookie = orig_cookie;
2469                         goto top;
2470                 /*
2471                  * An errno value of ESRCH indicates normal completion.
2472                  * If ENOENT is returned, then the underlying dataset
2473                  * has been removed since we obtained the handle.
2474                  */
2475                 case ESRCH:
2476                 case ENOENT:
2477                         rc = 1;
2478                         break;
2479                 default:
2480                         rc = zfs_standard_error(zhp->zfs_hdl, errno,
2481                             dgettext(TEXT_DOMAIN,
2482                             "cannot iterate filesystems"));
2483                         break;
2484                 }
2485         }
2486         return (rc);
2487 }
2488
2489 /*
2490  * Iterate over all child filesystems
2491  */
2492 int
2493 zfs_iter_filesystems(zfs_handle_t *zhp, zfs_iter_f func, void *data)
2494 {
2495         zfs_cmd_t zc = { "\0", "\0", "\0", "\0", 0 };
2496         zfs_handle_t *nzhp;
2497         int ret;
2498
2499         if (zhp->zfs_type != ZFS_TYPE_FILESYSTEM)
2500                 return (0);
2501
2502         if (zcmd_alloc_dst_nvlist(zhp->zfs_hdl, &zc, 0) != 0)
2503                 return (-1);
2504
2505         while ((ret = zfs_do_list_ioctl(zhp, ZFS_IOC_DATASET_LIST_NEXT,
2506             &zc)) == 0) {
2507                 /*
2508                  * Silently ignore errors, as the only plausible explanation is
2509                  * that the pool has since been removed.
2510                  */
2511                 if ((nzhp = make_dataset_handle_zc(zhp->zfs_hdl,
2512                     &zc)) == NULL) {
2513                         continue;
2514                 }
2515
2516                 if ((ret = func(nzhp, data)) != 0) {
2517                         zcmd_free_nvlists(&zc);
2518                         return (ret);
2519                 }
2520         }
2521         zcmd_free_nvlists(&zc);
2522         return ((ret < 0) ? ret : 0);
2523 }
2524
2525 /*
2526  * Iterate over all snapshots
2527  */
2528 int
2529 zfs_iter_snapshots(zfs_handle_t *zhp, zfs_iter_f func, void *data)
2530 {
2531         zfs_cmd_t zc = { "\0", "\0", "\0", "\0", 0 };
2532         zfs_handle_t *nzhp;
2533         int ret;
2534
2535         if (zhp->zfs_type == ZFS_TYPE_SNAPSHOT)
2536                 return (0);
2537
2538         if (zcmd_alloc_dst_nvlist(zhp->zfs_hdl, &zc, 0) != 0)
2539                 return (-1);
2540         while ((ret = zfs_do_list_ioctl(zhp, ZFS_IOC_SNAPSHOT_LIST_NEXT,
2541             &zc)) == 0) {
2542
2543                 if ((nzhp = make_dataset_handle_zc(zhp->zfs_hdl,
2544                     &zc)) == NULL) {
2545                         continue;
2546                 }
2547
2548                 if ((ret = func(nzhp, data)) != 0) {
2549                         zcmd_free_nvlists(&zc);
2550                         return (ret);
2551                 }
2552         }
2553         zcmd_free_nvlists(&zc);
2554         return ((ret < 0) ? ret : 0);
2555 }
2556
2557 /*
2558  * Iterate over all children, snapshots and filesystems
2559  */
2560 int
2561 zfs_iter_children(zfs_handle_t *zhp, zfs_iter_f func, void *data)
2562 {
2563         int ret;
2564
2565         if ((ret = zfs_iter_filesystems(zhp, func, data)) != 0)
2566                 return (ret);
2567
2568         return (zfs_iter_snapshots(zhp, func, data));
2569 }
2570
2571 /*
2572  * Is one dataset name a child dataset of another?
2573  *
2574  * Needs to handle these cases:
2575  * Dataset 1    "a/foo"         "a/foo"         "a/foo"         "a/foo"
2576  * Dataset 2    "a/fo"          "a/foobar"      "a/bar/baz"     "a/foo/bar"
2577  * Descendant?  No.             No.             No.             Yes.
2578  */
2579 static boolean_t
2580 is_descendant(const char *ds1, const char *ds2)
2581 {
2582         size_t d1len = strlen(ds1);
2583
2584         /* ds2 can't be a descendant if it's smaller */
2585         if (strlen(ds2) < d1len)
2586                 return (B_FALSE);
2587
2588         /* otherwise, compare strings and verify that there's a '/' char */
2589         return (ds2[d1len] == '/' && (strncmp(ds1, ds2, d1len) == 0));
2590 }
2591
2592 /*
2593  * Given a complete name, return just the portion that refers to the parent.
2594  * Can return NULL if this is a pool.
2595  */
2596 static int
2597 parent_name(const char *path, char *buf, size_t buflen)
2598 {
2599         char *loc;
2600
2601         if ((loc = strrchr(path, '/')) == NULL)
2602                 return (-1);
2603
2604         (void) strncpy(buf, path, MIN(buflen, loc - path));
2605         buf[loc - path] = '\0';
2606
2607         return (0);
2608 }
2609
2610 /*
2611  * If accept_ancestor is false, then check to make sure that the given path has
2612  * a parent, and that it exists.  If accept_ancestor is true, then find the
2613  * closest existing ancestor for the given path.  In prefixlen return the
2614  * length of already existing prefix of the given path.  We also fetch the
2615  * 'zoned' property, which is used to validate property settings when creating
2616  * new datasets.
2617  */
2618 static int
2619 check_parents(libzfs_handle_t *hdl, const char *path, uint64_t *zoned,
2620     boolean_t accept_ancestor, int *prefixlen)
2621 {
2622         zfs_cmd_t zc = { "\0", "\0", "\0", "\0", 0 };
2623         char parent[ZFS_MAXNAMELEN];
2624         char *slash;
2625         zfs_handle_t *zhp;
2626         char errbuf[1024];
2627         uint64_t is_zoned;
2628
2629         (void) snprintf(errbuf, sizeof (errbuf),
2630             dgettext(TEXT_DOMAIN, "cannot create '%s'"), path);
2631
2632         /* get parent, and check to see if this is just a pool */
2633         if (parent_name(path, parent, sizeof (parent)) != 0) {
2634                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
2635                     "missing dataset name"));
2636                 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
2637         }
2638
2639         /* check to see if the pool exists */
2640         if ((slash = strchr(parent, '/')) == NULL)
2641                 slash = parent + strlen(parent);
2642         (void) strncpy(zc.zc_name, parent, slash - parent);
2643         zc.zc_name[slash - parent] = '\0';
2644         if (ioctl(hdl->libzfs_fd, ZFS_IOC_OBJSET_STATS, &zc) != 0 &&
2645             errno == ENOENT) {
2646                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
2647                     "no such pool '%s'"), zc.zc_name);
2648                 return (zfs_error(hdl, EZFS_NOENT, errbuf));
2649         }
2650
2651         /* check to see if the parent dataset exists */
2652         while ((zhp = make_dataset_handle(hdl, parent)) == NULL) {
2653                 if (errno == ENOENT && accept_ancestor) {
2654                         /*
2655                          * Go deeper to find an ancestor, give up on top level.
2656                          */
2657                         if (parent_name(parent, parent, sizeof (parent)) != 0) {
2658                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
2659                                     "no such pool '%s'"), zc.zc_name);
2660                                 return (zfs_error(hdl, EZFS_NOENT, errbuf));
2661                         }
2662                 } else if (errno == ENOENT) {
2663                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
2664                             "parent does not exist"));
2665                         return (zfs_error(hdl, EZFS_NOENT, errbuf));
2666                 } else
2667                         return (zfs_standard_error(hdl, errno, errbuf));
2668         }
2669
2670         is_zoned = zfs_prop_get_int(zhp, ZFS_PROP_ZONED);
2671         if (zoned != NULL)
2672                 *zoned = is_zoned;
2673
2674         /* we are in a non-global zone, but parent is in the global zone */
2675         if (getzoneid() != GLOBAL_ZONEID && !is_zoned) {
2676                 (void) zfs_standard_error(hdl, EPERM, errbuf);
2677                 zfs_close(zhp);
2678                 return (-1);
2679         }
2680
2681         /* make sure parent is a filesystem */
2682         if (zfs_get_type(zhp) != ZFS_TYPE_FILESYSTEM) {
2683                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
2684                     "parent is not a filesystem"));
2685                 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf);
2686                 zfs_close(zhp);
2687                 return (-1);
2688         }
2689
2690         zfs_close(zhp);
2691         if (prefixlen != NULL)
2692                 *prefixlen = strlen(parent);
2693         return (0);
2694 }
2695
2696 /*
2697  * Finds whether the dataset of the given type(s) exists.
2698  */
2699 boolean_t
2700 zfs_dataset_exists(libzfs_handle_t *hdl, const char *path, zfs_type_t types)
2701 {
2702         zfs_handle_t *zhp;
2703
2704         if (!zfs_validate_name(hdl, path, types, B_FALSE))
2705                 return (B_FALSE);
2706
2707         /*
2708          * Try to get stats for the dataset, which will tell us if it exists.
2709          */
2710         if ((zhp = make_dataset_handle(hdl, path)) != NULL) {
2711                 int ds_type = zhp->zfs_type;
2712
2713                 zfs_close(zhp);
2714                 if (types & ds_type)
2715                         return (B_TRUE);
2716         }
2717         return (B_FALSE);
2718 }
2719
2720 /*
2721  * Given a path to 'target', create all the ancestors between
2722  * the prefixlen portion of the path, and the target itself.
2723  * Fail if the initial prefixlen-ancestor does not already exist.
2724  */
2725 int
2726 create_parents(libzfs_handle_t *hdl, char *target, int prefixlen)
2727 {
2728         zfs_handle_t *h;
2729         char *cp;
2730         const char *opname;
2731
2732         /* make sure prefix exists */
2733         cp = target + prefixlen;
2734         if (*cp != '/') {
2735                 assert(strchr(cp, '/') == NULL);
2736                 h = zfs_open(hdl, target, ZFS_TYPE_FILESYSTEM);
2737         } else {
2738                 *cp = '\0';
2739                 h = zfs_open(hdl, target, ZFS_TYPE_FILESYSTEM);
2740                 *cp = '/';
2741         }
2742         if (h == NULL)
2743                 return (-1);
2744         zfs_close(h);
2745
2746         /*
2747          * Attempt to create, mount, and share any ancestor filesystems,
2748          * up to the prefixlen-long one.
2749          */
2750         for (cp = target + prefixlen + 1;
2751             (cp = strchr(cp, '/')); *cp = '/', cp++) {
2752                 char *logstr;
2753
2754                 *cp = '\0';
2755
2756                 h = make_dataset_handle(hdl, target);
2757                 if (h) {
2758                         /* it already exists, nothing to do here */
2759                         zfs_close(h);
2760                         continue;
2761                 }
2762
2763                 logstr = hdl->libzfs_log_str;
2764                 hdl->libzfs_log_str = NULL;
2765                 if (zfs_create(hdl, target, ZFS_TYPE_FILESYSTEM,
2766                     NULL) != 0) {
2767                         hdl->libzfs_log_str = logstr;
2768                         opname = dgettext(TEXT_DOMAIN, "create");
2769                         goto ancestorerr;
2770                 }
2771
2772                 hdl->libzfs_log_str = logstr;
2773                 h = zfs_open(hdl, target, ZFS_TYPE_FILESYSTEM);
2774                 if (h == NULL) {
2775                         opname = dgettext(TEXT_DOMAIN, "open");
2776                         goto ancestorerr;
2777                 }
2778
2779                 if (zfs_mount(h, NULL, 0) != 0) {
2780                         opname = dgettext(TEXT_DOMAIN, "mount");
2781                         goto ancestorerr;
2782                 }
2783
2784                 if (zfs_share(h) != 0) {
2785                         opname = dgettext(TEXT_DOMAIN, "share");
2786                         goto ancestorerr;
2787                 }
2788
2789                 zfs_close(h);
2790         }
2791
2792         return (0);
2793
2794 ancestorerr:
2795         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
2796             "failed to %s ancestor '%s'"), opname, target);
2797         return (-1);
2798 }
2799
2800 /*
2801  * Creates non-existing ancestors of the given path.
2802  */
2803 int
2804 zfs_create_ancestors(libzfs_handle_t *hdl, const char *path)
2805 {
2806         int prefix;
2807         char *path_copy;
2808         int rc = 0;
2809
2810         if (check_parents(hdl, path, NULL, B_TRUE, &prefix) != 0)
2811                 return (-1);
2812
2813         if ((path_copy = strdup(path)) != NULL) {
2814                 rc = create_parents(hdl, path_copy, prefix);
2815                 free(path_copy);
2816         }
2817         if (path_copy == NULL || rc != 0)
2818                 return (-1);
2819
2820         return (0);
2821 }
2822
2823 /*
2824  * Create a new filesystem or volume.
2825  */
2826 int
2827 zfs_create(libzfs_handle_t *hdl, const char *path, zfs_type_t type,
2828     nvlist_t *props)
2829 {
2830         zfs_cmd_t zc = { "\0", "\0", "\0", "\0", 0 };
2831         int ret;
2832         uint64_t size = 0;
2833         uint64_t blocksize = zfs_prop_default_numeric(ZFS_PROP_VOLBLOCKSIZE);
2834         char errbuf[1024];
2835         uint64_t zoned;
2836
2837         (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
2838             "cannot create '%s'"), path);
2839
2840         /* validate the path, taking care to note the extended error message */
2841         if (!zfs_validate_name(hdl, path, type, B_TRUE))
2842                 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
2843
2844         /* validate parents exist */
2845         if (check_parents(hdl, path, &zoned, B_FALSE, NULL) != 0)
2846                 return (-1);
2847
2848         /*
2849          * The failure modes when creating a dataset of a different type over
2850          * one that already exists is a little strange.  In particular, if you
2851          * try to create a dataset on top of an existing dataset, the ioctl()
2852          * will return ENOENT, not EEXIST.  To prevent this from happening, we
2853          * first try to see if the dataset exists.
2854          */
2855         (void) strlcpy(zc.zc_name, path, sizeof (zc.zc_name));
2856         if (zfs_dataset_exists(hdl, zc.zc_name, ZFS_TYPE_DATASET)) {
2857                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
2858                     "dataset already exists"));
2859                 return (zfs_error(hdl, EZFS_EXISTS, errbuf));
2860         }
2861
2862         if (type == ZFS_TYPE_VOLUME)
2863                 zc.zc_objset_type = DMU_OST_ZVOL;
2864         else
2865                 zc.zc_objset_type = DMU_OST_ZFS;
2866
2867         if (props && (props = zfs_valid_proplist(hdl, type, props,
2868             zoned, NULL, errbuf)) == 0)
2869                 return (-1);
2870
2871         if (type == ZFS_TYPE_VOLUME) {
2872                 /*
2873                  * If we are creating a volume, the size and block size must
2874                  * satisfy a few restraints.  First, the blocksize must be a
2875                  * valid block size between SPA_{MIN,MAX}BLOCKSIZE.  Second, the
2876                  * volsize must be a multiple of the block size, and cannot be
2877                  * zero.
2878                  */
2879                 if (props == NULL || nvlist_lookup_uint64(props,
2880                     zfs_prop_to_name(ZFS_PROP_VOLSIZE), &size) != 0) {
2881                         nvlist_free(props);
2882                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
2883                             "missing volume size"));
2884                         return (zfs_error(hdl, EZFS_BADPROP, errbuf));
2885                 }
2886
2887                 if ((ret = nvlist_lookup_uint64(props,
2888                     zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE),
2889                     &blocksize)) != 0) {
2890                         if (ret == ENOENT) {
2891                                 blocksize = zfs_prop_default_numeric(
2892                                     ZFS_PROP_VOLBLOCKSIZE);
2893                         } else {
2894                                 nvlist_free(props);
2895                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
2896                                     "missing volume block size"));
2897                                 return (zfs_error(hdl, EZFS_BADPROP, errbuf));
2898                         }
2899                 }
2900
2901                 if (size == 0) {
2902                         nvlist_free(props);
2903                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
2904                             "volume size cannot be zero"));
2905                         return (zfs_error(hdl, EZFS_BADPROP, errbuf));
2906                 }
2907
2908                 if (size % blocksize != 0) {
2909                         nvlist_free(props);
2910                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
2911                             "volume size must be a multiple of volume block "
2912                             "size"));
2913                         return (zfs_error(hdl, EZFS_BADPROP, errbuf));
2914                 }
2915         }
2916
2917         if (props && zcmd_write_src_nvlist(hdl, &zc, props) != 0)
2918                 return (-1);
2919         nvlist_free(props);
2920
2921         /* create the dataset */
2922         ret = zfs_ioctl(hdl, ZFS_IOC_CREATE, &zc);
2923
2924         if (ret == 0 && type == ZFS_TYPE_VOLUME) {
2925                 ret = zvol_create_link(hdl, path);
2926                 if (ret) {
2927                         (void) zfs_standard_error(hdl, errno,
2928                             dgettext(TEXT_DOMAIN,
2929                             "Volume successfully created, but device links "
2930                             "were not created"));
2931                         zcmd_free_nvlists(&zc);
2932                         return (-1);
2933                 }
2934         }
2935
2936         zcmd_free_nvlists(&zc);
2937
2938         /* check for failure */
2939         if (ret != 0) {
2940                 char parent[ZFS_MAXNAMELEN];
2941                 (void) parent_name(path, parent, sizeof (parent));
2942
2943                 switch (errno) {
2944                 case ENOENT:
2945                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
2946                             "no such parent '%s'"), parent);
2947                         return (zfs_error(hdl, EZFS_NOENT, errbuf));
2948
2949                 case EINVAL:
2950                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
2951                             "parent '%s' is not a filesystem"), parent);
2952                         return (zfs_error(hdl, EZFS_BADTYPE, errbuf));
2953
2954                 case EDOM:
2955                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
2956                             "volume block size must be power of 2 from "
2957                             "%u to %uk"),
2958                             (uint_t)SPA_MINBLOCKSIZE,
2959                             (uint_t)SPA_MAXBLOCKSIZE >> 10);
2960
2961                         return (zfs_error(hdl, EZFS_BADPROP, errbuf));
2962
2963                 case ENOTSUP:
2964                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
2965                             "pool must be upgraded to set this "
2966                             "property or value"));
2967                         return (zfs_error(hdl, EZFS_BADVERSION, errbuf));
2968 #ifdef _ILP32
2969                 case EOVERFLOW:
2970                         /*
2971                          * This platform can't address a volume this big.
2972                          */
2973                         if (type == ZFS_TYPE_VOLUME)
2974                                 return (zfs_error(hdl, EZFS_VOLTOOBIG,
2975                                     errbuf));
2976 #endif
2977                         /* FALLTHROUGH */
2978                 default:
2979                         return (zfs_standard_error(hdl, errno, errbuf));
2980                 }
2981         }
2982
2983         return (0);
2984 }
2985
2986 /*
2987  * Destroys the given dataset.  The caller must make sure that the filesystem
2988  * isn't mounted, and that there are no active dependents.
2989  */
2990 int
2991 zfs_destroy(zfs_handle_t *zhp, boolean_t defer)
2992 {
2993         zfs_cmd_t zc = { "\0", "\0", "\0", "\0", 0 };
2994
2995         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
2996
2997         if (ZFS_IS_VOLUME(zhp)) {
2998                 if (zvol_remove_link(zhp->zfs_hdl, zhp->zfs_name) != 0)
2999                         return (-1);
3000
3001                 zc.zc_objset_type = DMU_OST_ZVOL;
3002         } else {
3003                 zc.zc_objset_type = DMU_OST_ZFS;
3004         }
3005
3006         zc.zc_defer_destroy = defer;
3007         if (zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_DESTROY, &zc) != 0) {
3008                 return (zfs_standard_error_fmt(zhp->zfs_hdl, errno,
3009                     dgettext(TEXT_DOMAIN, "cannot destroy '%s'"),
3010                     zhp->zfs_name));
3011         }
3012
3013         remove_mountpoint(zhp);
3014
3015         return (0);
3016 }
3017
3018 struct destroydata {
3019         char *snapname;
3020         boolean_t gotone;
3021         boolean_t closezhp;
3022 };
3023
3024 static int
3025 zfs_check_snap_cb(zfs_handle_t *zhp, void *arg)
3026 {
3027         struct destroydata *dd = arg;
3028         zfs_handle_t *szhp;
3029         char name[ZFS_MAXNAMELEN];
3030         boolean_t closezhp = dd->closezhp;
3031         int rv = 0;
3032
3033         (void) strlcpy(name, zhp->zfs_name, sizeof (name));
3034         (void) strlcat(name, "@", sizeof (name));
3035         (void) strlcat(name, dd->snapname, sizeof (name));
3036
3037         szhp = make_dataset_handle(zhp->zfs_hdl, name);
3038         if (szhp) {
3039                 dd->gotone = B_TRUE;
3040                 zfs_close(szhp);
3041         }
3042
3043         if (zhp->zfs_type == ZFS_TYPE_VOLUME) {
3044                 (void) zvol_remove_link(zhp->zfs_hdl, name);
3045                 /*
3046                  * NB: this is simply a best-effort.  We don't want to
3047                  * return an error, because then we wouldn't visit all
3048                  * the volumes.
3049                  */
3050         }
3051
3052         dd->closezhp = B_TRUE;
3053         rv = zfs_iter_filesystems(zhp, zfs_check_snap_cb, arg);
3054         if (closezhp)
3055                 zfs_close(zhp);
3056         return (rv);
3057 }
3058
3059 /*
3060  * Destroys all snapshots with the given name in zhp & descendants.
3061  */
3062 int
3063 zfs_destroy_snaps(zfs_handle_t *zhp, char *snapname, boolean_t defer)
3064 {
3065         zfs_cmd_t zc = { "\0", "\0", "\0", "\0", 0 };
3066         int ret;
3067         struct destroydata dd = { 0 };
3068
3069         dd.snapname = snapname;
3070         (void) zfs_check_snap_cb(zhp, &dd);
3071
3072         if (!dd.gotone) {
3073                 return (zfs_standard_error_fmt(zhp->zfs_hdl, ENOENT,
3074                     dgettext(TEXT_DOMAIN, "cannot destroy '%s@%s'"),
3075                     zhp->zfs_name, snapname));
3076         }
3077
3078         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
3079         (void) strlcpy(zc.zc_value, snapname, sizeof (zc.zc_value));
3080         zc.zc_defer_destroy = defer;
3081
3082         ret = zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_DESTROY_SNAPS, &zc);
3083         if (ret != 0) {
3084                 char errbuf[1024];
3085
3086                 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3087                     "cannot destroy '%s@%s'"), zc.zc_name, snapname);
3088
3089                 switch (errno) {
3090                 case EEXIST:
3091                         zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN,
3092                             "snapshot is cloned"));
3093                         return (zfs_error(zhp->zfs_hdl, EZFS_EXISTS, errbuf));
3094
3095                 default:
3096                         return (zfs_standard_error(zhp->zfs_hdl, errno,
3097                             errbuf));
3098                 }
3099         }
3100
3101         return (0);
3102 }
3103
3104 /*
3105  * Clones the given dataset.  The target must be of the same type as the source.
3106  */
3107 int
3108 zfs_clone(zfs_handle_t *zhp, const char *target, nvlist_t *props)
3109 {
3110         zfs_cmd_t zc = { "\0", "\0", "\0", "\0", 0 };
3111         char parent[ZFS_MAXNAMELEN];
3112         int ret;
3113         char errbuf[1024];
3114         libzfs_handle_t *hdl = zhp->zfs_hdl;
3115         zfs_type_t type;
3116         uint64_t zoned;
3117
3118         assert(zhp->zfs_type == ZFS_TYPE_SNAPSHOT);
3119
3120         (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3121             "cannot create '%s'"), target);
3122
3123         /* validate the target name */
3124         if (!zfs_validate_name(hdl, target, ZFS_TYPE_FILESYSTEM, B_TRUE))
3125                 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3126
3127         /* validate parents exist */
3128         if (check_parents(hdl, target, &zoned, B_FALSE, NULL) != 0)
3129                 return (-1);
3130
3131         (void) parent_name(target, parent, sizeof (parent));
3132
3133         /* do the clone */
3134         if (ZFS_IS_VOLUME(zhp)) {
3135                 zc.zc_objset_type = DMU_OST_ZVOL;
3136                 type = ZFS_TYPE_VOLUME;
3137         } else {
3138                 zc.zc_objset_type = DMU_OST_ZFS;
3139                 type = ZFS_TYPE_FILESYSTEM;
3140         }
3141
3142         if (props) {
3143                 if ((props = zfs_valid_proplist(hdl, type, props, zoned,
3144                     zhp, errbuf)) == NULL)
3145                         return (-1);
3146
3147                 if (zcmd_write_src_nvlist(hdl, &zc, props) != 0) {
3148                         nvlist_free(props);
3149                         return (-1);
3150                 }
3151
3152                 nvlist_free(props);
3153         }
3154
3155         (void) strlcpy(zc.zc_name, target, sizeof (zc.zc_name));
3156         (void) strlcpy(zc.zc_value, zhp->zfs_name, sizeof (zc.zc_value));
3157         ret = zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_CREATE, &zc);
3158
3159         zcmd_free_nvlists(&zc);
3160
3161         if (ret != 0) {
3162                 switch (errno) {
3163
3164                 case ENOENT:
3165                         /*
3166                          * The parent doesn't exist.  We should have caught this
3167                          * above, but there may a race condition that has since
3168                          * destroyed the parent.
3169                          *
3170                          * At this point, we don't know whether it's the source
3171                          * that doesn't exist anymore, or whether the target
3172                          * dataset doesn't exist.
3173                          */
3174                         zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN,
3175                             "no such parent '%s'"), parent);
3176                         return (zfs_error(zhp->zfs_hdl, EZFS_NOENT, errbuf));
3177
3178                 case EXDEV:
3179                         zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN,
3180                             "source and target pools differ"));
3181                         return (zfs_error(zhp->zfs_hdl, EZFS_CROSSTARGET,
3182                             errbuf));
3183
3184                 default:
3185                         return (zfs_standard_error(zhp->zfs_hdl, errno,
3186                             errbuf));
3187                 }
3188         } else if (ZFS_IS_VOLUME(zhp)) {
3189                 ret = zvol_create_link(zhp->zfs_hdl, target);
3190         }
3191
3192         return (ret);
3193 }
3194
3195 typedef struct promote_data {
3196         char cb_mountpoint[MAXPATHLEN];
3197         const char *cb_target;
3198         const char *cb_errbuf;
3199         uint64_t cb_pivot_txg;
3200 } promote_data_t;
3201
3202 static int
3203 promote_snap_cb(zfs_handle_t *zhp, void *data)
3204 {
3205         promote_data_t *pd = data;
3206         zfs_handle_t *szhp;
3207         char snapname[MAXPATHLEN];
3208         int rv = 0;
3209
3210         /* We don't care about snapshots after the pivot point */
3211         if (zfs_prop_get_int(zhp, ZFS_PROP_CREATETXG) > pd->cb_pivot_txg) {
3212                 zfs_close(zhp);
3213                 return (0);
3214         }
3215
3216         /* Remove the device link if it's a zvol. */
3217         if (ZFS_IS_VOLUME(zhp))
3218                 (void) zvol_remove_link(zhp->zfs_hdl, zhp->zfs_name);
3219
3220         /* Check for conflicting names */
3221         (void) strlcpy(snapname, pd->cb_target, sizeof (snapname));
3222         (void) strlcat(snapname, strchr(zhp->zfs_name, '@'), sizeof (snapname));
3223         szhp = make_dataset_handle(zhp->zfs_hdl, snapname);
3224         if (szhp != NULL) {
3225                 zfs_close(szhp);
3226                 zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN,
3227                     "snapshot name '%s' from origin \n"
3228                     "conflicts with '%s' from target"),
3229                     zhp->zfs_name, snapname);
3230                 rv = zfs_error(zhp->zfs_hdl, EZFS_EXISTS, pd->cb_errbuf);
3231         }
3232         zfs_close(zhp);
3233         return (rv);
3234 }
3235
3236 static int
3237 promote_snap_done_cb(zfs_handle_t *zhp, void *data)
3238 {
3239         promote_data_t *pd = data;
3240
3241         /* We don't care about snapshots after the pivot point */
3242         if (zfs_prop_get_int(zhp, ZFS_PROP_CREATETXG) <= pd->cb_pivot_txg) {
3243                 /* Create the device link if it's a zvol. */
3244                 if (ZFS_IS_VOLUME(zhp))
3245                         (void) zvol_create_link(zhp->zfs_hdl, zhp->zfs_name);
3246         }
3247
3248         zfs_close(zhp);
3249         return (0);
3250 }
3251
3252 /*
3253  * Promotes the given clone fs to be the clone parent.
3254  */
3255 int
3256 zfs_promote(zfs_handle_t *zhp)
3257 {
3258         libzfs_handle_t *hdl = zhp->zfs_hdl;
3259         zfs_cmd_t zc = { "\0", "\0", "\0", "\0", 0 };
3260         char parent[MAXPATHLEN];
3261         char *cp;
3262         int ret;
3263         zfs_handle_t *pzhp;
3264         promote_data_t pd;
3265         char errbuf[1024];
3266
3267         (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3268             "cannot promote '%s'"), zhp->zfs_name);
3269
3270         if (zhp->zfs_type == ZFS_TYPE_SNAPSHOT) {
3271                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3272                     "snapshots can not be promoted"));
3273                 return (zfs_error(hdl, EZFS_BADTYPE, errbuf));
3274         }
3275
3276         (void) strlcpy(parent, zhp->zfs_dmustats.dds_origin, sizeof (parent));
3277         if (parent[0] == '\0') {
3278                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3279                     "not a cloned filesystem"));
3280                 return (zfs_error(hdl, EZFS_BADTYPE, errbuf));
3281         }
3282         cp = strchr(parent, '@');
3283         *cp = '\0';
3284
3285         /* Walk the snapshots we will be moving */
3286         pzhp = zfs_open(hdl, zhp->zfs_dmustats.dds_origin, ZFS_TYPE_SNAPSHOT);
3287         if (pzhp == NULL)
3288                 return (-1);
3289         pd.cb_pivot_txg = zfs_prop_get_int(pzhp, ZFS_PROP_CREATETXG);
3290         zfs_close(pzhp);
3291         pd.cb_target = zhp->zfs_name;
3292         pd.cb_errbuf = errbuf;
3293         pzhp = zfs_open(hdl, parent, ZFS_TYPE_DATASET);
3294         if (pzhp == NULL)
3295                 return (-1);
3296         (void) zfs_prop_get(pzhp, ZFS_PROP_MOUNTPOINT, pd.cb_mountpoint,
3297             sizeof (pd.cb_mountpoint), NULL, NULL, 0, FALSE);
3298         ret = zfs_iter_snapshots(pzhp, promote_snap_cb, &pd);
3299         if (ret != 0) {
3300                 zfs_close(pzhp);
3301                 return (-1);
3302         }
3303
3304         /* issue the ioctl */
3305         (void) strlcpy(zc.zc_value, zhp->zfs_dmustats.dds_origin,
3306             sizeof (zc.zc_value));
3307         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
3308         ret = zfs_ioctl(hdl, ZFS_IOC_PROMOTE, &zc);
3309
3310         if (ret != 0) {
3311                 int save_errno = errno;
3312
3313                 (void) zfs_iter_snapshots(pzhp, promote_snap_done_cb, &pd);
3314                 zfs_close(pzhp);
3315
3316                 switch (save_errno) {
3317                 case EEXIST:
3318                         /*
3319                          * There is a conflicting snapshot name.  We
3320                          * should have caught this above, but they could
3321                          * have renamed something in the mean time.
3322                          */
3323                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3324                             "conflicting snapshot '%s' from parent '%s'"),
3325                             zc.zc_string, parent);
3326                         return (zfs_error(hdl, EZFS_EXISTS, errbuf));
3327
3328                 default:
3329                         return (zfs_standard_error(hdl, save_errno, errbuf));
3330                 }
3331         } else {
3332                 (void) zfs_iter_snapshots(zhp, promote_snap_done_cb, &pd);
3333         }
3334
3335         zfs_close(pzhp);
3336         return (ret);
3337 }
3338
3339 struct createdata {
3340         const char *cd_snapname;
3341         int cd_ifexists;
3342 };
3343
3344 static int
3345 zfs_create_link_cb(zfs_handle_t *zhp, void *arg)
3346 {
3347         struct createdata *cd = arg;
3348         int ret;
3349
3350         if (zhp->zfs_type == ZFS_TYPE_VOLUME) {
3351                 char name[MAXPATHLEN];
3352
3353                 (void) strlcpy(name, zhp->zfs_name, sizeof (name));
3354                 (void) strlcat(name, "@", sizeof (name));
3355                 (void) strlcat(name, cd->cd_snapname, sizeof (name));
3356                 (void) zvol_create_link_common(zhp->zfs_hdl, name,
3357                     cd->cd_ifexists);
3358                 /*
3359                  * NB: this is simply a best-effort.  We don't want to
3360                  * return an error, because then we wouldn't visit all
3361                  * the volumes.
3362                  */
3363         }
3364
3365         ret = zfs_iter_filesystems(zhp, zfs_create_link_cb, cd);
3366
3367         zfs_close(zhp);
3368
3369         return (ret);
3370 }
3371
3372 /*
3373  * Takes a snapshot of the given dataset.
3374  */
3375 int
3376 zfs_snapshot(libzfs_handle_t *hdl, const char *path, boolean_t recursive,
3377     nvlist_t *props)
3378 {
3379         const char *delim;
3380         char parent[ZFS_MAXNAMELEN];
3381         zfs_handle_t *zhp;
3382         zfs_cmd_t zc = { "\0", "\0", "\0", "\0", 0 };
3383         int ret;
3384         char errbuf[1024];
3385
3386         (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3387             "cannot snapshot '%s'"), path);
3388
3389         /* validate the target name */
3390         if (!zfs_validate_name(hdl, path, ZFS_TYPE_SNAPSHOT, B_TRUE))
3391                 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3392
3393         if (props) {
3394                 if ((props = zfs_valid_proplist(hdl, ZFS_TYPE_SNAPSHOT,
3395                     props, B_FALSE, NULL, errbuf)) == NULL)
3396                         return (-1);
3397
3398                 if (zcmd_write_src_nvlist(hdl, &zc, props) != 0) {
3399                         nvlist_free(props);
3400                         return (-1);
3401                 }
3402
3403                 nvlist_free(props);
3404         }
3405
3406         /* make sure the parent exists and is of the appropriate type */
3407         delim = strchr(path, '@');
3408         (void) strncpy(parent, path, delim - path);
3409         parent[delim - path] = '\0';
3410
3411         if ((zhp = zfs_open(hdl, parent, ZFS_TYPE_FILESYSTEM |
3412             ZFS_TYPE_VOLUME)) == NULL) {
3413                 zcmd_free_nvlists(&zc);
3414                 return (-1);
3415         }
3416
3417         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
3418         (void) strlcpy(zc.zc_value, delim+1, sizeof (zc.zc_value));
3419         if (ZFS_IS_VOLUME(zhp))
3420                 zc.zc_objset_type = DMU_OST_ZVOL;
3421         else
3422                 zc.zc_objset_type = DMU_OST_ZFS;
3423         zc.zc_cookie = recursive;
3424         ret = zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_SNAPSHOT, &zc);
3425
3426         zcmd_free_nvlists(&zc);
3427
3428         /*
3429          * if it was recursive, the one that actually failed will be in
3430          * zc.zc_name.
3431          */
3432         if (ret != 0)
3433                 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3434                     "cannot create snapshot '%s@%s'"), zc.zc_name, zc.zc_value);
3435
3436         if (ret == 0 && recursive) {
3437                 struct createdata cd;
3438
3439                 cd.cd_snapname = delim + 1;
3440                 cd.cd_ifexists = B_FALSE;
3441                 (void) zfs_iter_filesystems(zhp, zfs_create_link_cb, &cd);
3442         }
3443         if (ret == 0 && zhp->zfs_type == ZFS_TYPE_VOLUME) {
3444                 ret = zvol_create_link(zhp->zfs_hdl, path);
3445                 if (ret != 0) {
3446                         (void) zfs_standard_error(hdl, errno,
3447                             dgettext(TEXT_DOMAIN,
3448                             "Volume successfully snapshotted, but device links "
3449                             "were not created"));
3450                         zfs_close(zhp);
3451                         return (-1);
3452                 }
3453         }
3454
3455         if (ret != 0)
3456                 (void) zfs_standard_error(hdl, errno, errbuf);
3457
3458         zfs_close(zhp);
3459
3460         return (ret);
3461 }
3462
3463 /*
3464  * Destroy any more recent snapshots.  We invoke this callback on any dependents
3465  * of the snapshot first.  If the 'cb_dependent' member is non-zero, then this
3466  * is a dependent and we should just destroy it without checking the transaction
3467  * group.
3468  */
3469 typedef struct rollback_data {
3470         const char      *cb_target;             /* the snapshot */
3471         uint64_t        cb_create;              /* creation time reference */
3472         boolean_t       cb_error;
3473         boolean_t       cb_dependent;
3474         boolean_t       cb_force;
3475 } rollback_data_t;
3476
3477 static int
3478 rollback_destroy(zfs_handle_t *zhp, void *data)
3479 {
3480         rollback_data_t *cbp = data;
3481
3482         if (!cbp->cb_dependent) {
3483                 if (strcmp(zhp->zfs_name, cbp->cb_target) != 0 &&
3484                     zfs_get_type(zhp) == ZFS_TYPE_SNAPSHOT &&
3485                     zfs_prop_get_int(zhp, ZFS_PROP_CREATETXG) >
3486                     cbp->cb_create) {
3487                         char *logstr;
3488
3489                         cbp->cb_dependent = B_TRUE;
3490                         cbp->cb_error |= zfs_iter_dependents(zhp, B_FALSE,
3491                             rollback_destroy, cbp);
3492                         cbp->cb_dependent = B_FALSE;
3493
3494                         logstr = zhp->zfs_hdl->libzfs_log_str;
3495                         zhp->zfs_hdl->libzfs_log_str = NULL;
3496                         cbp->cb_error |= zfs_destroy(zhp, B_FALSE);
3497                         zhp->zfs_hdl->libzfs_log_str = logstr;
3498                 }
3499         } else {
3500                 /* We must destroy this clone; first unmount it */
3501                 prop_changelist_t *clp;
3502
3503                 clp = changelist_gather(zhp, ZFS_PROP_NAME, 0,
3504                     cbp->cb_force ? MS_FORCE: 0);
3505                 if (clp == NULL || changelist_prefix(clp) != 0) {
3506                         cbp->cb_error = B_TRUE;
3507                         zfs_close(zhp);
3508                         return (0);
3509                 }
3510                 if (zfs_destroy(zhp, B_FALSE) != 0)
3511                         cbp->cb_error = B_TRUE;
3512                 else
3513                         changelist_remove(clp, zhp->zfs_name);
3514                 (void) changelist_postfix(clp);
3515                 changelist_free(clp);
3516         }
3517
3518         zfs_close(zhp);
3519         return (0);
3520 }
3521
3522 /*
3523  * Given a dataset, rollback to a specific snapshot, discarding any
3524  * data changes since then and making it the active dataset.
3525  *
3526  * Any snapshots more recent than the target are destroyed, along with
3527  * their dependents.
3528  */
3529 int
3530 zfs_rollback(zfs_handle_t *zhp, zfs_handle_t *snap, boolean_t force)
3531 {
3532         rollback_data_t cb = { 0 };
3533         int err;
3534         zfs_cmd_t zc = { "\0", "\0", "\0", "\0", 0 };
3535         boolean_t restore_resv = 0;
3536         uint64_t old_volsize = 0, new_volsize;
3537         zfs_prop_t resv_prop = { 0 };
3538
3539         assert(zhp->zfs_type == ZFS_TYPE_FILESYSTEM ||
3540             zhp->zfs_type == ZFS_TYPE_VOLUME);
3541
3542         /*
3543          * Destroy all recent snapshots and its dependends.
3544          */
3545         cb.cb_force = force;
3546         cb.cb_target = snap->zfs_name;
3547         cb.cb_create = zfs_prop_get_int(snap, ZFS_PROP_CREATETXG);
3548         (void) zfs_iter_children(zhp, rollback_destroy, &cb);
3549
3550         if (cb.cb_error)
3551                 return (-1);
3552
3553         /*
3554          * Now that we have verified that the snapshot is the latest,
3555          * rollback to the given snapshot.
3556          */
3557
3558         if (zhp->zfs_type == ZFS_TYPE_VOLUME) {
3559                 if (zvol_remove_link(zhp->zfs_hdl, zhp->zfs_name) != 0)
3560                         return (-1);
3561                 if (zfs_which_resv_prop(zhp, &resv_prop) < 0)
3562                         return (-1);
3563                 old_volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE);
3564                 restore_resv =
3565                     (old_volsize == zfs_prop_get_int(zhp, resv_prop));
3566         }
3567
3568         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
3569
3570         if (ZFS_IS_VOLUME(zhp))
3571                 zc.zc_objset_type = DMU_OST_ZVOL;
3572         else
3573                 zc.zc_objset_type = DMU_OST_ZFS;
3574
3575         /*
3576          * We rely on zfs_iter_children() to verify that there are no
3577          * newer snapshots for the given dataset.  Therefore, we can
3578          * simply pass the name on to the ioctl() call.  There is still
3579          * an unlikely race condition where the user has taken a
3580          * snapshot since we verified that this was the most recent.
3581          *
3582          */
3583         if ((err = zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_ROLLBACK, &zc)) != 0) {
3584                 (void) zfs_standard_error_fmt(zhp->zfs_hdl, errno,
3585                     dgettext(TEXT_DOMAIN, "cannot rollback '%s'"),
3586                     zhp->zfs_name);
3587                 return (err);
3588         }
3589
3590         /*
3591          * For volumes, if the pre-rollback volsize matched the pre-
3592          * rollback reservation and the volsize has changed then set
3593          * the reservation property to the post-rollback volsize.
3594          * Make a new handle since the rollback closed the dataset.
3595          */
3596         if ((zhp->zfs_type == ZFS_TYPE_VOLUME) &&
3597             (zhp = make_dataset_handle(zhp->zfs_hdl, zhp->zfs_name))) {
3598                 if ((err = zvol_create_link(zhp->zfs_hdl, zhp->zfs_name))) {
3599                         zfs_close(zhp);
3600                         return (err);
3601                 }
3602                 if (restore_resv) {
3603                         new_volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE);
3604                         if (old_volsize != new_volsize)
3605                                 err = zfs_prop_set_int(zhp, resv_prop,
3606                                     new_volsize);
3607                 }
3608                 zfs_close(zhp);
3609         }
3610         return (err);
3611 }
3612
3613 /*
3614  * Iterate over all dependents for a given dataset.  This includes both
3615  * hierarchical dependents (children) and data dependents (snapshots and
3616  * clones).  The bulk of the processing occurs in get_dependents() in
3617  * libzfs_graph.c.
3618  */
3619 int
3620 zfs_iter_dependents(zfs_handle_t *zhp, boolean_t allowrecursion,
3621     zfs_iter_f func, void *data)
3622 {
3623         char **dependents;
3624         size_t count;
3625         int i;
3626         zfs_handle_t *child;
3627         int ret = 0;
3628
3629         if (get_dependents(zhp->zfs_hdl, allowrecursion, zhp->zfs_name,
3630             &dependents, &count) != 0)
3631                 return (-1);
3632
3633         for (i = 0; i < count; i++) {
3634                 if ((child = make_dataset_handle(zhp->zfs_hdl,
3635                     dependents[i])) == NULL)
3636                         continue;
3637
3638                 if ((ret = func(child, data)) != 0)
3639                         break;
3640         }
3641
3642         for (i = 0; i < count; i++)
3643                 free(dependents[i]);
3644         free(dependents);
3645
3646         return (ret);
3647 }
3648
3649 /*
3650  * Renames the given dataset.
3651  */
3652 int
3653 zfs_rename(zfs_handle_t *zhp, const char *target, boolean_t recursive)
3654 {
3655         int ret;
3656         zfs_cmd_t zc = { "\0", "\0", "\0", "\0", 0 };
3657         char *delim;
3658         prop_changelist_t *cl = NULL;
3659         zfs_handle_t *zhrp = NULL;
3660         char *parentname = NULL;
3661         char parent[ZFS_MAXNAMELEN];
3662         libzfs_handle_t *hdl = zhp->zfs_hdl;
3663         char errbuf[1024];
3664
3665         /* if we have the same exact name, just return success */
3666         if (strcmp(zhp->zfs_name, target) == 0)
3667                 return (0);
3668
3669         (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3670             "cannot rename to '%s'"), target);
3671
3672         /*
3673          * Make sure the target name is valid
3674          */
3675         if (zhp->zfs_type == ZFS_TYPE_SNAPSHOT) {
3676                 if ((strchr(target, '@') == NULL) ||
3677                     *target == '@') {
3678                         /*
3679                          * Snapshot target name is abbreviated,
3680                          * reconstruct full dataset name
3681                          */
3682                         (void) strlcpy(parent, zhp->zfs_name,
3683                             sizeof (parent));
3684                         delim = strchr(parent, '@');
3685                         if (strchr(target, '@') == NULL)
3686                                 *(++delim) = '\0';
3687                         else
3688                                 *delim = '\0';
3689                         (void) strlcat(parent, target, sizeof (parent));
3690                         target = parent;
3691                 } else {
3692                         /*
3693                          * Make sure we're renaming within the same dataset.
3694                          */
3695                         delim = strchr(target, '@');
3696                         if (strncmp(zhp->zfs_name, target, delim - target)
3697                             != 0 || zhp->zfs_name[delim - target] != '@') {
3698                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3699                                     "snapshots must be part of same "
3700                                     "dataset"));
3701                                 return (zfs_error(hdl, EZFS_CROSSTARGET,
3702                                     errbuf));
3703                         }
3704                 }
3705                 if (!zfs_validate_name(hdl, target, zhp->zfs_type, B_TRUE))
3706                         return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3707         } else {
3708                 if (recursive) {
3709                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3710                             "recursive rename must be a snapshot"));
3711                         return (zfs_error(hdl, EZFS_BADTYPE, errbuf));
3712                 }
3713
3714                 if (!zfs_validate_name(hdl, target, zhp->zfs_type, B_TRUE))
3715                         return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3716
3717                 /* validate parents */
3718                 if (check_parents(hdl, target, NULL, B_FALSE, NULL) != 0)
3719                         return (-1);
3720
3721                 /* make sure we're in the same pool */
3722                 verify((delim = strchr(target, '/')) != NULL);
3723                 if (strncmp(zhp->zfs_name, target, delim - target) != 0 ||
3724                     zhp->zfs_name[delim - target] != '/') {
3725                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3726                             "datasets must be within same pool"));
3727                         return (zfs_error(hdl, EZFS_CROSSTARGET, errbuf));
3728                 }
3729
3730                 /* new name cannot be a child of the current dataset name */
3731                 if (is_descendant(zhp->zfs_name, target)) {
3732                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3733                             "New dataset name cannot be a descendant of "
3734                             "current dataset name"));
3735                         return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3736                 }
3737         }
3738
3739         (void) snprintf(errbuf, sizeof (errbuf),
3740             dgettext(TEXT_DOMAIN, "cannot rename '%s'"), zhp->zfs_name);
3741
3742         if (getzoneid() == GLOBAL_ZONEID &&
3743             zfs_prop_get_int(zhp, ZFS_PROP_ZONED)) {
3744                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3745                     "dataset is used in a non-global zone"));
3746                 return (zfs_error(hdl, EZFS_ZONED, errbuf));
3747         }
3748
3749         if (recursive) {
3750                 struct destroydata dd;
3751
3752                 parentname = zfs_strdup(zhp->zfs_hdl, zhp->zfs_name);
3753                 if (parentname == NULL) {
3754                         ret = -1;
3755                         goto error;
3756                 }
3757                 delim = strchr(parentname, '@');
3758                 *delim = '\0';
3759                 zhrp = zfs_open(zhp->zfs_hdl, parentname, ZFS_TYPE_DATASET);
3760                 if (zhrp == NULL) {
3761                         ret = -1;
3762                         goto error;
3763                 }
3764
3765                 dd.snapname = delim + 1;
3766                 dd.gotone = B_FALSE;
3767                 dd.closezhp = B_TRUE;
3768
3769                 /* We remove any zvol links prior to renaming them */
3770                 ret = zfs_iter_filesystems(zhrp, zfs_check_snap_cb, &dd);
3771                 if (ret) {
3772                         goto error;
3773                 }
3774         } else {
3775                 if ((cl = changelist_gather(zhp, ZFS_PROP_NAME, 0, 0)) == NULL)
3776                         return (-1);
3777
3778                 if (changelist_haszonedchild(cl)) {
3779                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3780                             "child dataset with inherited mountpoint is used "
3781                             "in a non-global zone"));
3782                         (void) zfs_error(hdl, EZFS_ZONED, errbuf);
3783                         ret = -1;
3784                         goto error;
3785                 }
3786
3787                 if ((ret = changelist_prefix(cl)) != 0)
3788                         goto error;
3789         }
3790
3791         if (ZFS_IS_VOLUME(zhp))
3792                 zc.zc_objset_type = DMU_OST_ZVOL;
3793         else
3794                 zc.zc_objset_type = DMU_OST_ZFS;
3795
3796         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
3797         (void) strlcpy(zc.zc_value, target, sizeof (zc.zc_value));
3798
3799         zc.zc_cookie = recursive;
3800
3801         if ((ret = zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_RENAME, &zc)) != 0) {
3802                 /*
3803                  * if it was recursive, the one that actually failed will
3804                  * be in zc.zc_name
3805                  */
3806                 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3807                     "cannot rename '%s'"), zc.zc_name);
3808
3809                 if (recursive && errno == EEXIST) {
3810                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3811                             "a child dataset already has a snapshot "
3812                             "with the new name"));
3813                         (void) zfs_error(hdl, EZFS_EXISTS, errbuf);
3814                 } else {
3815                         (void) zfs_standard_error(zhp->zfs_hdl, errno, errbuf);
3816                 }
3817
3818                 /*
3819                  * On failure, we still want to remount any filesystems that
3820                  * were previously mounted, so we don't alter the system state.
3821                  */
3822                 if (recursive) {
3823                         struct createdata cd;
3824
3825                         /* only create links for datasets that had existed */
3826                         cd.cd_snapname = delim + 1;
3827                         cd.cd_ifexists = B_TRUE;
3828                         (void) zfs_iter_filesystems(zhrp, zfs_create_link_cb,
3829                             &cd);
3830                 } else {
3831                         (void) changelist_postfix(cl);
3832                 }
3833         } else {
3834                 if (recursive) {
3835                         struct createdata cd;
3836
3837                         /* only create links for datasets that had existed */
3838                         cd.cd_snapname = strchr(target, '@') + 1;
3839                         cd.cd_ifexists = B_TRUE;
3840                         ret = zfs_iter_filesystems(zhrp, zfs_create_link_cb,
3841                             &cd);
3842                 } else {
3843                         changelist_rename(cl, zfs_get_name(zhp), target);
3844                         ret = changelist_postfix(cl);
3845                 }
3846         }
3847
3848 error:
3849         if (parentname) {
3850                 free(parentname);
3851         }
3852         if (zhrp) {
3853                 zfs_close(zhrp);
3854         }
3855         if (cl) {
3856                 changelist_free(cl);
3857         }
3858         return (ret);
3859 }
3860
3861 /*
3862  * Given a zvol dataset, issue the ioctl to create the appropriate minor node,
3863  * and wait briefly for udev to create the /dev link.
3864  */
3865 int
3866 zvol_create_link(libzfs_handle_t *hdl, const char *dataset)
3867 {
3868         return (zvol_create_link_common(hdl, dataset, B_FALSE));
3869 }
3870
3871 static int
3872 zvol_create_link_common(libzfs_handle_t *hdl, const char *dataset, int ifexists)
3873 {
3874         zfs_cmd_t zc = { "\0", "\0", "\0", "\0", 0 };
3875         char path[MAXPATHLEN];
3876         int error;
3877
3878         (void) strlcpy(zc.zc_name, dataset, sizeof (zc.zc_name));
3879
3880         /*
3881          * Issue the appropriate ioctl.
3882          */
3883         if (ioctl(hdl->libzfs_fd, ZFS_IOC_CREATE_MINOR, &zc) != 0) {
3884                 switch (errno) {
3885                 case EEXIST:
3886                         /*
3887                          * Silently ignore the case where the link already
3888                          * exists.  This allows 'zfs volinit' to be run multiple
3889                          * times without errors.
3890                          */
3891                         return (0);
3892
3893                 case ENOENT:
3894                         /*
3895                          * Dataset does not exist in the kernel.  If we
3896                          * don't care (see zfs_rename), then ignore the
3897                          * error quietly.
3898                          */
3899                         if (ifexists) {
3900                                 return (0);
3901                         }
3902
3903                         /* FALLTHROUGH */
3904
3905                 default:
3906                         return (zfs_standard_error_fmt(hdl, errno,
3907                             dgettext(TEXT_DOMAIN, "cannot create device links "
3908                             "for '%s'"), dataset));
3909                 }
3910         }
3911
3912         /*
3913          * Wait up to 10 seconds for udev to create the device.
3914          */
3915         (void) snprintf(path, sizeof (path), "%s/%s", ZVOL_DIR, dataset);
3916         error = zpool_label_disk_wait(path, 10000);
3917         if (error)
3918                 (void) printf(gettext("%s may not be immediately "
3919                     "available\n"), path);
3920
3921         return (0);
3922 }
3923
3924 /*
3925  * Remove a minor node for the given zvol and the associated /dev links.
3926  */
3927 int
3928 zvol_remove_link(libzfs_handle_t *hdl, const char *dataset)
3929 {
3930         zfs_cmd_t zc = { "\0", "\0", "\0", "\0", 0 };
3931
3932         (void) strlcpy(zc.zc_name, dataset, sizeof (zc.zc_name));
3933
3934         if (ioctl(hdl->libzfs_fd, ZFS_IOC_REMOVE_MINOR, &zc) != 0) {
3935                 switch (errno) {
3936                 case ENXIO:
3937                         /*
3938                          * Silently ignore the case where the link no longer
3939                          * exists, so that 'zfs volfini' can be run multiple
3940                          * times without errors.
3941                          */
3942                         return (0);
3943
3944                 default:
3945                         return (zfs_standard_error_fmt(hdl, errno,
3946                             dgettext(TEXT_DOMAIN, "cannot remove device "
3947                             "links for '%s'"), dataset));
3948                 }
3949         }
3950
3951         return (0);
3952 }
3953
3954 nvlist_t *
3955 zfs_get_user_props(zfs_handle_t *zhp)
3956 {
3957         return (zhp->zfs_user_props);
3958 }
3959
3960 /*
3961  * This function is used by 'zfs list' to determine the exact set of columns to
3962  * display, and their maximum widths.  This does two main things:
3963  *
3964  *      - If this is a list of all properties, then expand the list to include
3965  *        all native properties, and set a flag so that for each dataset we look
3966  *        for new unique user properties and add them to the list.
3967  *
3968  *      - For non fixed-width properties, keep track of the maximum width seen
3969  *        so that we can size the column appropriately. If the user has
3970  *        requested received property values, we also need to compute the width
3971  *        of the RECEIVED column.
3972  */
3973 int
3974 zfs_expand_proplist(zfs_handle_t *zhp, zprop_list_t **plp, boolean_t received)
3975 {
3976         libzfs_handle_t *hdl = zhp->zfs_hdl;
3977         zprop_list_t *entry;
3978         zprop_list_t **last, **start;
3979         nvlist_t *userprops, *propval;
3980         nvpair_t *elem;
3981         char *strval;
3982         char buf[ZFS_MAXPROPLEN];
3983
3984         if (zprop_expand_list(hdl, plp, ZFS_TYPE_DATASET) != 0)
3985                 return (-1);
3986
3987         userprops = zfs_get_user_props(zhp);
3988
3989         entry = *plp;
3990         if (entry->pl_all && nvlist_next_nvpair(userprops, NULL) != NULL) {
3991                 /*
3992                  * Go through and add any user properties as necessary.  We
3993                  * start by incrementing our list pointer to the first
3994                  * non-native property.
3995                  */
3996                 start = plp;
3997                 while (*start != NULL) {
3998                         if ((*start)->pl_prop == ZPROP_INVAL)
3999                                 break;
4000                         start = &(*start)->pl_next;
4001                 }
4002
4003                 elem = NULL;
4004                 while ((elem = nvlist_next_nvpair(userprops, elem)) != NULL) {
4005                         /*
4006                          * See if we've already found this property in our list.
4007                          */
4008                         for (last = start; *last != NULL;
4009                             last = &(*last)->pl_next) {
4010                                 if (strcmp((*last)->pl_user_prop,
4011                                     nvpair_name(elem)) == 0)
4012                                         break;
4013                         }
4014
4015                         if (*last == NULL) {
4016                                 if ((entry = zfs_alloc(hdl,
4017                                     sizeof (zprop_list_t))) == NULL ||
4018                                     ((entry->pl_user_prop = zfs_strdup(hdl,
4019                                     nvpair_name(elem)))) == NULL) {
4020                                         free(entry);
4021                                         return (-1);
4022                                 }
4023
4024                                 entry->pl_prop = ZPROP_INVAL;
4025                                 entry->pl_width = strlen(nvpair_name(elem));
4026                                 entry->pl_all = B_TRUE;
4027                                 *last = entry;
4028                         }
4029                 }
4030         }
4031
4032         /*
4033          * Now go through and check the width of any non-fixed columns
4034          */
4035         for (entry = *plp; entry != NULL; entry = entry->pl_next) {
4036                 if (entry->pl_fixed)
4037                         continue;
4038
4039                 if (entry->pl_prop != ZPROP_INVAL) {
4040                         if (zfs_prop_get(zhp, entry->pl_prop,
4041                             buf, sizeof (buf), NULL, NULL, 0, B_FALSE) == 0) {
4042                                 if (strlen(buf) > entry->pl_width)
4043                                         entry->pl_width = strlen(buf);
4044                         }
4045                         if (received && zfs_prop_get_recvd(zhp,
4046                             zfs_prop_to_name(entry->pl_prop),
4047                             buf, sizeof (buf), B_FALSE) == 0)
4048                                 if (strlen(buf) > entry->pl_recvd_width)
4049                                         entry->pl_recvd_width = strlen(buf);
4050                 } else {
4051                         if (nvlist_lookup_nvlist(userprops, entry->pl_user_prop,
4052                             &propval) == 0) {
4053                                 verify(nvlist_lookup_string(propval,
4054                                     ZPROP_VALUE, &strval) == 0);
4055                                 if (strlen(strval) > entry->pl_width)
4056                                         entry->pl_width = strlen(strval);
4057                         }
4058                         if (received && zfs_prop_get_recvd(zhp,
4059                             entry->pl_user_prop,
4060                             buf, sizeof (buf), B_FALSE) == 0)
4061                                 if (strlen(buf) > entry->pl_recvd_width)
4062                                         entry->pl_recvd_width = strlen(buf);
4063                 }
4064         }
4065
4066         return (0);
4067 }
4068
4069 void
4070 zfs_prune_proplist(zfs_handle_t *zhp, uint8_t *props)
4071 {
4072         nvpair_t *curr;
4073
4074         /*
4075          * Keep a reference to the props-table against which we prune the
4076          * properties.
4077          */
4078         zhp->zfs_props_table = props;
4079
4080         curr = nvlist_next_nvpair(zhp->zfs_props, NULL);
4081
4082         while (curr) {
4083                 zfs_prop_t zfs_prop = zfs_name_to_prop(nvpair_name(curr));
4084                 nvpair_t *next = nvlist_next_nvpair(zhp->zfs_props, curr);
4085
4086                 /*
4087                  * User properties will result in ZPROP_INVAL, and since we
4088                  * only know how to prune standard ZFS properties, we always
4089                  * leave these in the list.  This can also happen if we
4090                  * encounter an unknown DSL property (when running older
4091                  * software, for example).
4092                  */
4093                 if (zfs_prop != ZPROP_INVAL && props[zfs_prop] == B_FALSE)
4094                         (void) nvlist_remove(zhp->zfs_props,
4095                             nvpair_name(curr), nvpair_type(curr));
4096                 curr = next;
4097         }
4098 }
4099
4100 static int
4101 zfs_smb_acl_mgmt(libzfs_handle_t *hdl, char *dataset, char *path,
4102     zfs_smb_acl_op_t cmd, char *resource1, char *resource2)
4103 {
4104         zfs_cmd_t zc = { "\0", "\0", "\0", "\0", 0 };
4105         nvlist_t *nvlist = NULL;
4106         int error;
4107
4108         (void) strlcpy(zc.zc_name, dataset, sizeof (zc.zc_name));
4109         (void) strlcpy(zc.zc_value, path, sizeof (zc.zc_value));
4110         zc.zc_cookie = (uint64_t)cmd;
4111
4112         if (cmd == ZFS_SMB_ACL_RENAME) {
4113                 if (nvlist_alloc(&nvlist, NV_UNIQUE_NAME, 0) != 0) {
4114                         (void) no_memory(hdl);
4115                         return (-1);
4116                 }
4117         }
4118
4119         switch (cmd) {
4120         case ZFS_SMB_ACL_ADD:
4121         case ZFS_SMB_ACL_REMOVE:
4122                 (void) strlcpy(zc.zc_string, resource1, sizeof (zc.zc_string));
4123                 break;
4124         case ZFS_SMB_ACL_RENAME:
4125                 if (nvlist_add_string(nvlist, ZFS_SMB_ACL_SRC,
4126                     resource1) != 0) {
4127                                 (void) no_memory(hdl);
4128                                 return (-1);
4129                 }
4130                 if (nvlist_add_string(nvlist, ZFS_SMB_ACL_TARGET,
4131                     resource2) != 0) {
4132                                 (void) no_memory(hdl);
4133                                 return (-1);
4134                 }
4135                 if (zcmd_write_src_nvlist(hdl, &zc, nvlist) != 0) {
4136                         nvlist_free(nvlist);
4137                         return (-1);
4138                 }
4139                 break;
4140         case ZFS_SMB_ACL_PURGE:
4141                 break;
4142         default:
4143                 return (-1);
4144         }
4145         error = ioctl(hdl->libzfs_fd, ZFS_IOC_SMB_ACL, &zc);
4146         if (nvlist)
4147                 nvlist_free(nvlist);
4148         return (error);
4149 }
4150
4151 int
4152 zfs_smb_acl_add(libzfs_handle_t *hdl, char *dataset,
4153     char *path, char *resource)
4154 {
4155         return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_ADD,
4156             resource, NULL));
4157 }
4158
4159 int
4160 zfs_smb_acl_remove(libzfs_handle_t *hdl, char *dataset,
4161     char *path, char *resource)
4162 {
4163         return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_REMOVE,
4164             resource, NULL));
4165 }
4166
4167 int
4168 zfs_smb_acl_purge(libzfs_handle_t *hdl, char *dataset, char *path)
4169 {
4170         return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_PURGE,
4171             NULL, NULL));
4172 }
4173
4174 int
4175 zfs_smb_acl_rename(libzfs_handle_t *hdl, char *dataset, char *path,
4176     char *oldname, char *newname)
4177 {
4178         return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_RENAME,
4179             oldname, newname));
4180 }
4181
4182 int
4183 zfs_userspace(zfs_handle_t *zhp, zfs_userquota_prop_t type,
4184     zfs_userspace_cb_t func, void *arg)
4185 {
4186         zfs_cmd_t zc = { "\0", "\0", "\0", "\0", 0 };
4187         int error;
4188         zfs_useracct_t buf[100];
4189
4190         (void) strncpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
4191
4192         zc.zc_objset_type = type;
4193         zc.zc_nvlist_dst = (uintptr_t)buf;
4194
4195         /* CONSTCOND */
4196         while (1) {
4197                 zfs_useracct_t *zua = buf;
4198
4199                 zc.zc_nvlist_dst_size = sizeof (buf);
4200                 error = ioctl(zhp->zfs_hdl->libzfs_fd,
4201                     ZFS_IOC_USERSPACE_MANY, &zc);
4202                 if (error || zc.zc_nvlist_dst_size == 0)
4203                         break;
4204
4205                 while (zc.zc_nvlist_dst_size > 0) {
4206                         error = func(arg, zua->zu_domain, zua->zu_rid,
4207                             zua->zu_space);
4208                         if (error != 0)
4209                                 return (error);
4210                         zua++;
4211                         zc.zc_nvlist_dst_size -= sizeof (zfs_useracct_t);
4212                 }
4213         }
4214
4215         return (error);
4216 }
4217
4218 int
4219 zfs_hold(zfs_handle_t *zhp, const char *snapname, const char *tag,
4220     boolean_t recursive, boolean_t temphold, boolean_t enoent_ok,
4221     int cleanup_fd, uint64_t dsobj, uint64_t createtxg)
4222 {
4223         zfs_cmd_t zc = { "\0", "\0", "\0", "\0", 0 };
4224         libzfs_handle_t *hdl = zhp->zfs_hdl;
4225
4226         ASSERT(!recursive || dsobj == 0);
4227
4228         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
4229         (void) strlcpy(zc.zc_value, snapname, sizeof (zc.zc_value));
4230         if (strlcpy(zc.zc_string, tag, sizeof (zc.zc_string))
4231             >= sizeof (zc.zc_string))
4232                 return (zfs_error(hdl, EZFS_TAGTOOLONG, tag));
4233         zc.zc_cookie = recursive;
4234         zc.zc_temphold = temphold;
4235         zc.zc_cleanup_fd = cleanup_fd;
4236         zc.zc_sendobj = dsobj;
4237         zc.zc_createtxg = createtxg;
4238
4239         if (zfs_ioctl(hdl, ZFS_IOC_HOLD, &zc) != 0) {
4240                 char errbuf[ZFS_MAXNAMELEN+32];
4241
4242                 /*
4243                  * if it was recursive, the one that actually failed will be in
4244                  * zc.zc_name.
4245                  */
4246                 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
4247                     "cannot hold '%s@%s'"), zc.zc_name, snapname);
4248                 switch (errno) {
4249                 case E2BIG:
4250                         /*
4251                          * Temporary tags wind up having the ds object id
4252                          * prepended. So even if we passed the length check
4253                          * above, it's still possible for the tag to wind
4254                          * up being slightly too long.
4255                          */
4256                         return (zfs_error(hdl, EZFS_TAGTOOLONG, errbuf));
4257                 case ENOTSUP:
4258                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4259                             "pool must be upgraded"));
4260                         return (zfs_error(hdl, EZFS_BADVERSION, errbuf));
4261                 case EINVAL:
4262                         return (zfs_error(hdl, EZFS_BADTYPE, errbuf));
4263                 case EEXIST:
4264                         return (zfs_error(hdl, EZFS_REFTAG_HOLD, errbuf));
4265                 case ENOENT:
4266                         if (enoent_ok)
4267                                 return (ENOENT);
4268                         /* FALLTHROUGH */
4269                 default:
4270                         return (zfs_standard_error_fmt(hdl, errno, errbuf));
4271                 }
4272         }
4273
4274         return (0);
4275 }
4276
4277 int
4278 zfs_release(zfs_handle_t *zhp, const char *snapname, const char *tag,
4279     boolean_t recursive)
4280 {
4281         zfs_cmd_t zc = { "\0", "\0", "\0", "\0", 0 };
4282         libzfs_handle_t *hdl = zhp->zfs_hdl;
4283
4284         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
4285         (void) strlcpy(zc.zc_value, snapname, sizeof (zc.zc_value));
4286         if (strlcpy(zc.zc_string, tag, sizeof (zc.zc_string))
4287             >= sizeof (zc.zc_string))
4288                 return (zfs_error(hdl, EZFS_TAGTOOLONG, tag));
4289         zc.zc_cookie = recursive;
4290
4291         if (zfs_ioctl(hdl, ZFS_IOC_RELEASE, &zc) != 0) {
4292                 char errbuf[ZFS_MAXNAMELEN+32];
4293
4294                 /*
4295                  * if it was recursive, the one that actually failed will be in
4296                  * zc.zc_name.
4297                  */
4298                 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
4299                     "cannot release '%s' from '%s@%s'"), tag, zc.zc_name,
4300                     snapname);
4301                 switch (errno) {
4302                 case ESRCH:
4303                         return (zfs_error(hdl, EZFS_REFTAG_RELE, errbuf));
4304                 case ENOTSUP:
4305                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4306                             "pool must be upgraded"));
4307                         return (zfs_error(hdl, EZFS_BADVERSION, errbuf));
4308                 case EINVAL:
4309                         return (zfs_error(hdl, EZFS_BADTYPE, errbuf));
4310                 default:
4311                         return (zfs_standard_error_fmt(hdl, errno, errbuf));
4312                 }
4313         }
4314
4315         return (0);
4316 }
4317
4318 int
4319 zfs_get_fsacl(zfs_handle_t *zhp, nvlist_t **nvl)
4320 {
4321         zfs_cmd_t zc = { "\0", "\0", "\0", "\0", 0 };
4322         libzfs_handle_t *hdl = zhp->zfs_hdl;
4323         int nvsz = 2048;
4324         void *nvbuf;
4325         int err = 0;
4326         char errbuf[ZFS_MAXNAMELEN+32];
4327
4328         assert(zhp->zfs_type == ZFS_TYPE_VOLUME ||
4329             zhp->zfs_type == ZFS_TYPE_FILESYSTEM);
4330
4331 tryagain:
4332
4333         nvbuf = malloc(nvsz);
4334         if (nvbuf == NULL) {
4335                 err = (zfs_error(hdl, EZFS_NOMEM, strerror(errno)));
4336                 goto out;
4337         }
4338
4339         zc.zc_nvlist_dst_size = nvsz;
4340         zc.zc_nvlist_dst = (uintptr_t)nvbuf;
4341
4342         (void) strlcpy(zc.zc_name, zhp->zfs_name, ZFS_MAXNAMELEN);
4343
4344         if (zfs_ioctl(hdl, ZFS_IOC_GET_FSACL, &zc) != 0) {
4345                 (void) snprintf(errbuf, sizeof (errbuf),
4346                     dgettext(TEXT_DOMAIN, "cannot get permissions on '%s'"),
4347                     zc.zc_name);
4348                 switch (errno) {
4349                 case ENOMEM:
4350                         free(nvbuf);
4351                         nvsz = zc.zc_nvlist_dst_size;
4352                         goto tryagain;
4353
4354                 case ENOTSUP:
4355                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4356                             "pool must be upgraded"));
4357                         err = zfs_error(hdl, EZFS_BADVERSION, errbuf);
4358                         break;
4359                 case EINVAL:
4360                         err = zfs_error(hdl, EZFS_BADTYPE, errbuf);
4361                         break;
4362                 case ENOENT:
4363                         err = zfs_error(hdl, EZFS_NOENT, errbuf);
4364                         break;
4365                 default:
4366                         err = zfs_standard_error_fmt(hdl, errno, errbuf);
4367                         break;
4368                 }
4369         } else {
4370                 /* success */
4371                 int rc = nvlist_unpack(nvbuf, zc.zc_nvlist_dst_size, nvl, 0);
4372                 if (rc) {
4373                         (void) snprintf(errbuf, sizeof (errbuf), dgettext(
4374                             TEXT_DOMAIN, "cannot get permissions on '%s'"),
4375                             zc.zc_name);
4376                         err = zfs_standard_error_fmt(hdl, rc, errbuf);
4377                 }
4378         }
4379
4380         free(nvbuf);
4381 out:
4382         return (err);
4383 }
4384
4385 int
4386 zfs_set_fsacl(zfs_handle_t *zhp, boolean_t un, nvlist_t *nvl)
4387 {
4388         zfs_cmd_t zc = { "\0", "\0", "\0", "\0", 0 };
4389         libzfs_handle_t *hdl = zhp->zfs_hdl;
4390         char *nvbuf;
4391         char errbuf[ZFS_MAXNAMELEN+32];
4392         size_t nvsz;
4393         int err;
4394
4395         assert(zhp->zfs_type == ZFS_TYPE_VOLUME ||
4396             zhp->zfs_type == ZFS_TYPE_FILESYSTEM);
4397
4398         err = nvlist_size(nvl, &nvsz, NV_ENCODE_NATIVE);
4399         assert(err == 0);
4400
4401         nvbuf = malloc(nvsz);
4402
4403         err = nvlist_pack(nvl, &nvbuf, &nvsz, NV_ENCODE_NATIVE, 0);
4404         assert(err == 0);
4405
4406         zc.zc_nvlist_src_size = nvsz;
4407         zc.zc_nvlist_src = (uintptr_t)nvbuf;
4408         zc.zc_perm_action = un;
4409
4410         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
4411
4412         if (zfs_ioctl(hdl, ZFS_IOC_SET_FSACL, &zc) != 0) {
4413                 (void) snprintf(errbuf, sizeof (errbuf),
4414                     dgettext(TEXT_DOMAIN, "cannot set permissions on '%s'"),
4415                     zc.zc_name);
4416                 switch (errno) {
4417                 case ENOTSUP:
4418                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4419                             "pool must be upgraded"));
4420                         err = zfs_error(hdl, EZFS_BADVERSION, errbuf);
4421                         break;
4422                 case EINVAL:
4423                         err = zfs_error(hdl, EZFS_BADTYPE, errbuf);
4424                         break;
4425                 case ENOENT:
4426                         err = zfs_error(hdl, EZFS_NOENT, errbuf);
4427                         break;
4428                 default:
4429                         err = zfs_standard_error_fmt(hdl, errno, errbuf);
4430                         break;
4431                 }
4432         }
4433
4434         free(nvbuf);
4435
4436         return (err);
4437 }
4438
4439 int
4440 zfs_get_holds(zfs_handle_t *zhp, nvlist_t **nvl)
4441 {
4442         zfs_cmd_t zc = { "\0", "\0", "\0", "\0", 0 };
4443         libzfs_handle_t *hdl = zhp->zfs_hdl;
4444         int nvsz = 2048;
4445         void *nvbuf;
4446         int err = 0;
4447         char errbuf[ZFS_MAXNAMELEN+32];
4448
4449         assert(zhp->zfs_type == ZFS_TYPE_SNAPSHOT);
4450
4451 tryagain:
4452
4453         nvbuf = malloc(nvsz);
4454         if (nvbuf == NULL) {
4455                 err = (zfs_error(hdl, EZFS_NOMEM, strerror(errno)));
4456                 goto out;
4457         }
4458
4459         zc.zc_nvlist_dst_size = nvsz;
4460         zc.zc_nvlist_dst = (uintptr_t)nvbuf;
4461
4462         (void) strlcpy(zc.zc_name, zhp->zfs_name, ZFS_MAXNAMELEN);
4463
4464         if (zfs_ioctl(hdl, ZFS_IOC_GET_HOLDS, &zc) != 0) {
4465                 (void) snprintf(errbuf, sizeof (errbuf),
4466                     dgettext(TEXT_DOMAIN, "cannot get holds for '%s'"),
4467                     zc.zc_name);
4468                 switch (errno) {
4469                 case ENOMEM:
4470                         free(nvbuf);
4471                         nvsz = zc.zc_nvlist_dst_size;
4472                         goto tryagain;
4473
4474                 case ENOTSUP:
4475                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4476                             "pool must be upgraded"));
4477                         err = zfs_error(hdl, EZFS_BADVERSION, errbuf);
4478                         break;
4479                 case EINVAL:
4480                         err = zfs_error(hdl, EZFS_BADTYPE, errbuf);
4481                         break;
4482                 case ENOENT:
4483                         err = zfs_error(hdl, EZFS_NOENT, errbuf);
4484                         break;
4485                 default:
4486                         err = zfs_standard_error_fmt(hdl, errno, errbuf);
4487                         break;
4488                 }
4489         } else {
4490                 /* success */
4491                 int rc = nvlist_unpack(nvbuf, zc.zc_nvlist_dst_size, nvl, 0);
4492                 if (rc) {
4493                         (void) snprintf(errbuf, sizeof (errbuf),
4494                             dgettext(TEXT_DOMAIN, "cannot get holds for '%s'"),
4495                             zc.zc_name);
4496                         err = zfs_standard_error_fmt(hdl, rc, errbuf);
4497                 }
4498         }
4499
4500         free(nvbuf);
4501 out:
4502         return (err);
4503 }
4504
4505 uint64_t
4506 zvol_volsize_to_reservation(uint64_t volsize, nvlist_t *props)
4507 {
4508         uint64_t numdb;
4509         uint64_t nblocks, volblocksize;
4510         int ncopies;
4511         char *strval;
4512
4513         if (nvlist_lookup_string(props,
4514             zfs_prop_to_name(ZFS_PROP_COPIES), &strval) == 0)
4515                 ncopies = atoi(strval);
4516         else
4517                 ncopies = 1;
4518         if (nvlist_lookup_uint64(props,
4519             zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE),
4520             &volblocksize) != 0)
4521                 volblocksize = ZVOL_DEFAULT_BLOCKSIZE;
4522         nblocks = volsize/volblocksize;
4523         /* start with metadnode L0-L6 */
4524         numdb = 7;
4525         /* calculate number of indirects */
4526         while (nblocks > 1) {
4527                 nblocks += DNODES_PER_LEVEL - 1;
4528                 nblocks /= DNODES_PER_LEVEL;
4529                 numdb += nblocks;
4530         }
4531         numdb *= MIN(SPA_DVAS_PER_BP, ncopies + 1);
4532         volsize *= ncopies;
4533         /*
4534          * this is exactly DN_MAX_INDBLKSHIFT when metadata isn't
4535          * compressed, but in practice they compress down to about
4536          * 1100 bytes
4537          */
4538         numdb *= 1ULL << DN_MAX_INDBLKSHIFT;
4539         volsize += numdb;
4540         return (volsize);
4541 }