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