8115 parallel zfs mount

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21 
  22 /*
  23  * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
  24  * Copyright (c) 2013, Joyent, Inc. All rights reserved.
  25  * Copyright (c) 2011, 2016 by Delphix. All rights reserved.
  26  * Copyright (c) 2012 DEY Storage Systems, Inc.  All rights reserved.
  27  * Copyright (c) 2011-2012 Pawel Jakub Dawidek. All rights reserved.
  28  * Copyright (c) 2013 Martin Matuska. All rights reserved.
  29  * Copyright (c) 2013 Steven Hartland. All rights reserved.
  30  * Copyright (c) 2014 Integros [integros.com]
  31  * Copyright 2016 Nexenta Systems, Inc.
  32  * Copyright 2016 Igor Kozhukhov <ikozhukhov@gmail.com>
  33  * Copyright 2017 RackTop Systems.
  34  */
  35 
  36 #include <ctype.h>
  37 #include <errno.h>
  38 #include <libintl.h>
  39 #include <math.h>
  40 #include <stdio.h>
  41 #include <stdlib.h>
  42 #include <strings.h>
  43 #include <unistd.h>
  44 #include <stddef.h>
  45 #include <zone.h>
  46 #include <fcntl.h>
  47 #include <sys/mntent.h>
  48 #include <sys/mount.h>
  49 #include <priv.h>
  50 #include <pwd.h>
  51 #include <grp.h>
  52 #include <stddef.h>
  53 #include <ucred.h>
  54 #include <idmap.h>
  55 #include <aclutils.h>
  56 #include <directory.h>

  57 
  58 #include <sys/dnode.h>
  59 #include <sys/spa.h>
  60 #include <sys/zap.h>
  61 #include <libzfs.h>
  62 
  63 #include "zfs_namecheck.h"
  64 #include "zfs_prop.h"
  65 #include "libzfs_impl.h"
  66 #include "zfs_deleg.h"
  67 
  68 static int userquota_propname_decode(const char *propname, boolean_t zoned,
  69     zfs_userquota_prop_t *typep, char *domain, int domainlen, uint64_t *ridp);
  70 
  71 /*
  72  * Given a single type (not a mask of types), return the type in a human
  73  * readable form.
  74  */
  75 const char *
  76 zfs_type_to_name(zfs_type_t type)
  77 {
  78         switch (type) {
  79         case ZFS_TYPE_FILESYSTEM:
  80                 return (dgettext(TEXT_DOMAIN, "filesystem"));
  81         case ZFS_TYPE_SNAPSHOT:
  82                 return (dgettext(TEXT_DOMAIN, "snapshot"));
  83         case ZFS_TYPE_VOLUME:
  84                 return (dgettext(TEXT_DOMAIN, "volume"));
  85         case ZFS_TYPE_POOL:
  86                 return (dgettext(TEXT_DOMAIN, "pool"));
  87         case ZFS_TYPE_BOOKMARK:
  88                 return (dgettext(TEXT_DOMAIN, "bookmark"));
  89         default:
  90                 assert(!"unhandled zfs_type_t");
  91         }
  92 
  93         return (NULL);
  94 }
  95 
  96 /*
  97  * Validate a ZFS path.  This is used even before trying to open the dataset, to
  98  * provide a more meaningful error message.  We call zfs_error_aux() to
  99  * explain exactly why the name was not valid.
 100  */
 101 int
 102 zfs_validate_name(libzfs_handle_t *hdl, const char *path, int type,
 103     boolean_t modifying)
 104 {
 105         namecheck_err_t why;
 106         char what;
 107 
 108         if (entity_namecheck(path, &why, &what) != 0) {
 109                 if (hdl != NULL) {
 110                         switch (why) {
 111                         case NAME_ERR_TOOLONG:
 112                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 113                                     "name is too long"));
 114                                 break;
 115 
 116                         case NAME_ERR_LEADING_SLASH:
 117                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 118                                     "leading slash in name"));
 119                                 break;
 120 
 121                         case NAME_ERR_EMPTY_COMPONENT:
 122                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 123                                     "empty component in name"));
 124                                 break;
 125 
 126                         case NAME_ERR_TRAILING_SLASH:
 127                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 128                                     "trailing slash in name"));
 129                                 break;
 130 
 131                         case NAME_ERR_INVALCHAR:
 132                                 zfs_error_aux(hdl,
 133                                     dgettext(TEXT_DOMAIN, "invalid character "
 134                                     "'%c' in name"), what);
 135                                 break;
 136 
 137                         case NAME_ERR_MULTIPLE_DELIMITERS:
 138                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 139                                     "multiple '@' and/or '#' delimiters in "
 140                                     "name"));
 141                                 break;
 142 
 143                         case NAME_ERR_NOLETTER:
 144                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 145                                     "pool doesn't begin with a letter"));
 146                                 break;
 147 
 148                         case NAME_ERR_RESERVED:
 149                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 150                                     "name is reserved"));
 151                                 break;
 152 
 153                         case NAME_ERR_DISKLIKE:
 154                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 155                                     "reserved disk name"));
 156                                 break;
 157 
 158                         default:
 159                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 160                                     "(%d) not defined"), why);
 161                                 break;
 162                         }
 163                 }
 164 
 165                 return (0);
 166         }
 167 
 168         if (!(type & ZFS_TYPE_SNAPSHOT) && strchr(path, '@') != NULL) {
 169                 if (hdl != NULL)
 170                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 171                             "snapshot delimiter '@' is not expected here"));
 172                 return (0);
 173         }
 174 
 175         if (type == ZFS_TYPE_SNAPSHOT && strchr(path, '@') == NULL) {
 176                 if (hdl != NULL)
 177                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 178                             "missing '@' delimiter in snapshot name"));
 179                 return (0);
 180         }
 181 
 182         if (!(type & ZFS_TYPE_BOOKMARK) && strchr(path, '#') != NULL) {
 183                 if (hdl != NULL)
 184                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 185                             "bookmark delimiter '#' is not expected here"));
 186                 return (0);
 187         }
 188 
 189         if (type == ZFS_TYPE_BOOKMARK && strchr(path, '#') == NULL) {
 190                 if (hdl != NULL)
 191                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 192                             "missing '#' delimiter in bookmark name"));
 193                 return (0);
 194         }
 195 
 196         if (modifying && strchr(path, '%') != NULL) {
 197                 if (hdl != NULL)
 198                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 199                             "invalid character %c in name"), '%');
 200                 return (0);
 201         }
 202 
 203         return (-1);
 204 }
 205 
 206 int
 207 zfs_name_valid(const char *name, zfs_type_t type)
 208 {
 209         if (type == ZFS_TYPE_POOL)
 210                 return (zpool_name_valid(NULL, B_FALSE, name));
 211         return (zfs_validate_name(NULL, name, type, B_FALSE));
 212 }
 213 
 214 /*
 215  * This function takes the raw DSL properties, and filters out the user-defined
 216  * properties into a separate nvlist.
 217  */
 218 static nvlist_t *
 219 process_user_props(zfs_handle_t *zhp, nvlist_t *props)
 220 {
 221         libzfs_handle_t *hdl = zhp->zfs_hdl;
 222         nvpair_t *elem;
 223         nvlist_t *propval;
 224         nvlist_t *nvl;
 225 
 226         if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0) != 0) {
 227                 (void) no_memory(hdl);
 228                 return (NULL);
 229         }
 230 
 231         elem = NULL;
 232         while ((elem = nvlist_next_nvpair(props, elem)) != NULL) {
 233                 if (!zfs_prop_user(nvpair_name(elem)))
 234                         continue;
 235 
 236                 verify(nvpair_value_nvlist(elem, &propval) == 0);
 237                 if (nvlist_add_nvlist(nvl, nvpair_name(elem), propval) != 0) {
 238                         nvlist_free(nvl);
 239                         (void) no_memory(hdl);
 240                         return (NULL);
 241                 }
 242         }
 243 
 244         return (nvl);
 245 }
 246 
 247 static zpool_handle_t *
 248 zpool_add_handle(zfs_handle_t *zhp, const char *pool_name)
 249 {
 250         libzfs_handle_t *hdl = zhp->zfs_hdl;
 251         zpool_handle_t *zph;
 252 
 253         if ((zph = zpool_open_canfail(hdl, pool_name)) != NULL) {
 254                 if (hdl->libzfs_pool_handles != NULL)
 255                         zph->zpool_next = hdl->libzfs_pool_handles;
 256                 hdl->libzfs_pool_handles = zph;
 257         }
 258         return (zph);
 259 }
 260 
 261 static zpool_handle_t *
 262 zpool_find_handle(zfs_handle_t *zhp, const char *pool_name, int len)
 263 {
 264         libzfs_handle_t *hdl = zhp->zfs_hdl;
 265         zpool_handle_t *zph = hdl->libzfs_pool_handles;
 266 
 267         while ((zph != NULL) &&
 268             (strncmp(pool_name, zpool_get_name(zph), len) != 0))
 269                 zph = zph->zpool_next;
 270         return (zph);
 271 }
 272 
 273 /*
 274  * Returns a handle to the pool that contains the provided dataset.
 275  * If a handle to that pool already exists then that handle is returned.
 276  * Otherwise, a new handle is created and added to the list of handles.
 277  */
 278 static zpool_handle_t *
 279 zpool_handle(zfs_handle_t *zhp)
 280 {
 281         char *pool_name;
 282         int len;
 283         zpool_handle_t *zph;
 284 
 285         len = strcspn(zhp->zfs_name, "/@#") + 1;
 286         pool_name = zfs_alloc(zhp->zfs_hdl, len);
 287         (void) strlcpy(pool_name, zhp->zfs_name, len);
 288 
 289         zph = zpool_find_handle(zhp, pool_name, len);
 290         if (zph == NULL)
 291                 zph = zpool_add_handle(zhp, pool_name);
 292 
 293         free(pool_name);
 294         return (zph);
 295 }
 296 
 297 void
 298 zpool_free_handles(libzfs_handle_t *hdl)
 299 {
 300         zpool_handle_t *next, *zph = hdl->libzfs_pool_handles;
 301 
 302         while (zph != NULL) {
 303                 next = zph->zpool_next;
 304                 zpool_close(zph);
 305                 zph = next;
 306         }
 307         hdl->libzfs_pool_handles = NULL;
 308 }
 309 
 310 /*
 311  * Utility function to gather stats (objset and zpl) for the given object.
 312  */
 313 static int
 314 get_stats_ioctl(zfs_handle_t *zhp, zfs_cmd_t *zc)
 315 {
 316         libzfs_handle_t *hdl = zhp->zfs_hdl;
 317 
 318         (void) strlcpy(zc->zc_name, zhp->zfs_name, sizeof (zc->zc_name));
 319 
 320         while (ioctl(hdl->libzfs_fd, ZFS_IOC_OBJSET_STATS, zc) != 0) {
 321                 if (errno == ENOMEM) {
 322                         if (zcmd_expand_dst_nvlist(hdl, zc) != 0) {
 323                                 return (-1);
 324                         }
 325                 } else {
 326                         return (-1);
 327                 }
 328         }
 329         return (0);
 330 }
 331 
 332 /*
 333  * Utility function to get the received properties of the given object.
 334  */
 335 static int
 336 get_recvd_props_ioctl(zfs_handle_t *zhp)
 337 {
 338         libzfs_handle_t *hdl = zhp->zfs_hdl;
 339         nvlist_t *recvdprops;
 340         zfs_cmd_t zc = { 0 };
 341         int err;
 342 
 343         if (zcmd_alloc_dst_nvlist(hdl, &zc, 0) != 0)
 344                 return (-1);
 345 
 346         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
 347 
 348         while (ioctl(hdl->libzfs_fd, ZFS_IOC_OBJSET_RECVD_PROPS, &zc) != 0) {
 349                 if (errno == ENOMEM) {
 350                         if (zcmd_expand_dst_nvlist(hdl, &zc) != 0) {
 351                                 return (-1);
 352                         }
 353                 } else {
 354                         zcmd_free_nvlists(&zc);
 355                         return (-1);
 356                 }
 357         }
 358 
 359         err = zcmd_read_dst_nvlist(zhp->zfs_hdl, &zc, &recvdprops);
 360         zcmd_free_nvlists(&zc);
 361         if (err != 0)
 362                 return (-1);
 363 
 364         nvlist_free(zhp->zfs_recvd_props);
 365         zhp->zfs_recvd_props = recvdprops;
 366 
 367         return (0);
 368 }
 369 
 370 static int
 371 put_stats_zhdl(zfs_handle_t *zhp, zfs_cmd_t *zc)
 372 {
 373         nvlist_t *allprops, *userprops;
 374 
 375         zhp->zfs_dmustats = zc->zc_objset_stats; /* structure assignment */
 376 
 377         if (zcmd_read_dst_nvlist(zhp->zfs_hdl, zc, &allprops) != 0) {
 378                 return (-1);
 379         }
 380 
 381         /*
 382          * XXX Why do we store the user props separately, in addition to
 383          * storing them in zfs_props?
 384          */
 385         if ((userprops = process_user_props(zhp, allprops)) == NULL) {
 386                 nvlist_free(allprops);
 387                 return (-1);
 388         }
 389 
 390         nvlist_free(zhp->zfs_props);
 391         nvlist_free(zhp->zfs_user_props);
 392 
 393         zhp->zfs_props = allprops;
 394         zhp->zfs_user_props = userprops;
 395 
 396         return (0);
 397 }
 398 
 399 static int
 400 get_stats(zfs_handle_t *zhp)
 401 {
 402         int rc = 0;
 403         zfs_cmd_t zc = { 0 };
 404 
 405         if (zcmd_alloc_dst_nvlist(zhp->zfs_hdl, &zc, 0) != 0)
 406                 return (-1);
 407         if (get_stats_ioctl(zhp, &zc) != 0)
 408                 rc = -1;
 409         else if (put_stats_zhdl(zhp, &zc) != 0)
 410                 rc = -1;
 411         zcmd_free_nvlists(&zc);
 412         return (rc);
 413 }
 414 
 415 /*
 416  * Refresh the properties currently stored in the handle.
 417  */
 418 void
 419 zfs_refresh_properties(zfs_handle_t *zhp)
 420 {
 421         (void) get_stats(zhp);
 422 }
 423 
 424 /*
 425  * Makes a handle from the given dataset name.  Used by zfs_open() and
 426  * zfs_iter_* to create child handles on the fly.
 427  */
 428 static int
 429 make_dataset_handle_common(zfs_handle_t *zhp, zfs_cmd_t *zc)
 430 {
 431         if (put_stats_zhdl(zhp, zc) != 0)
 432                 return (-1);
 433 
 434         /*
 435          * We've managed to open the dataset and gather statistics.  Determine
 436          * the high-level type.
 437          */
 438         if (zhp->zfs_dmustats.dds_type == DMU_OST_ZVOL)
 439                 zhp->zfs_head_type = ZFS_TYPE_VOLUME;
 440         else if (zhp->zfs_dmustats.dds_type == DMU_OST_ZFS)
 441                 zhp->zfs_head_type = ZFS_TYPE_FILESYSTEM;
 442         else
 443                 abort();
 444 
 445         if (zhp->zfs_dmustats.dds_is_snapshot)
 446                 zhp->zfs_type = ZFS_TYPE_SNAPSHOT;
 447         else if (zhp->zfs_dmustats.dds_type == DMU_OST_ZVOL)
 448                 zhp->zfs_type = ZFS_TYPE_VOLUME;
 449         else if (zhp->zfs_dmustats.dds_type == DMU_OST_ZFS)
 450                 zhp->zfs_type = ZFS_TYPE_FILESYSTEM;
 451         else
 452                 abort();        /* we should never see any other types */
 453 
 454         if ((zhp->zpool_hdl = zpool_handle(zhp)) == NULL)
 455                 return (-1);
 456 
 457         return (0);
 458 }
 459 
 460 zfs_handle_t *
 461 make_dataset_handle(libzfs_handle_t *hdl, const char *path)
 462 {
 463         zfs_cmd_t zc = { 0 };
 464 
 465         zfs_handle_t *zhp = calloc(sizeof (zfs_handle_t), 1);
 466 
 467         if (zhp == NULL)
 468                 return (NULL);
 469 
 470         zhp->zfs_hdl = hdl;
 471         (void) strlcpy(zhp->zfs_name, path, sizeof (zhp->zfs_name));
 472         if (zcmd_alloc_dst_nvlist(hdl, &zc, 0) != 0) {
 473                 free(zhp);
 474                 return (NULL);
 475         }
 476         if (get_stats_ioctl(zhp, &zc) == -1) {
 477                 zcmd_free_nvlists(&zc);
 478                 free(zhp);
 479                 return (NULL);
 480         }
 481         if (make_dataset_handle_common(zhp, &zc) == -1) {
 482                 free(zhp);
 483                 zhp = NULL;
 484         }
 485         zcmd_free_nvlists(&zc);
 486         return (zhp);
 487 }
 488 
 489 zfs_handle_t *
 490 make_dataset_handle_zc(libzfs_handle_t *hdl, zfs_cmd_t *zc)
 491 {
 492         zfs_handle_t *zhp = calloc(sizeof (zfs_handle_t), 1);
 493 
 494         if (zhp == NULL)
 495                 return (NULL);
 496 
 497         zhp->zfs_hdl = hdl;
 498         (void) strlcpy(zhp->zfs_name, zc->zc_name, sizeof (zhp->zfs_name));
 499         if (make_dataset_handle_common(zhp, zc) == -1) {
 500                 free(zhp);
 501                 return (NULL);
 502         }
 503         return (zhp);
 504 }
 505 
 506 zfs_handle_t *
 507 make_dataset_simple_handle_zc(zfs_handle_t *pzhp, zfs_cmd_t *zc)
 508 {
 509         zfs_handle_t *zhp = calloc(sizeof (zfs_handle_t), 1);
 510 
 511         if (zhp == NULL)
 512                 return (NULL);
 513 
 514         zhp->zfs_hdl = pzhp->zfs_hdl;
 515         (void) strlcpy(zhp->zfs_name, zc->zc_name, sizeof (zhp->zfs_name));
 516         zhp->zfs_head_type = pzhp->zfs_type;
 517         zhp->zfs_type = ZFS_TYPE_SNAPSHOT;
 518         zhp->zpool_hdl = zpool_handle(zhp);
 519         return (zhp);
 520 }
 521 
 522 zfs_handle_t *
 523 zfs_handle_dup(zfs_handle_t *zhp_orig)
 524 {
 525         zfs_handle_t *zhp = calloc(sizeof (zfs_handle_t), 1);
 526 
 527         if (zhp == NULL)
 528                 return (NULL);
 529 
 530         zhp->zfs_hdl = zhp_orig->zfs_hdl;
 531         zhp->zpool_hdl = zhp_orig->zpool_hdl;
 532         (void) strlcpy(zhp->zfs_name, zhp_orig->zfs_name,
 533             sizeof (zhp->zfs_name));
 534         zhp->zfs_type = zhp_orig->zfs_type;
 535         zhp->zfs_head_type = zhp_orig->zfs_head_type;
 536         zhp->zfs_dmustats = zhp_orig->zfs_dmustats;
 537         if (zhp_orig->zfs_props != NULL) {
 538                 if (nvlist_dup(zhp_orig->zfs_props, &zhp->zfs_props, 0) != 0) {
 539                         (void) no_memory(zhp->zfs_hdl);
 540                         zfs_close(zhp);
 541                         return (NULL);
 542                 }
 543         }
 544         if (zhp_orig->zfs_user_props != NULL) {
 545                 if (nvlist_dup(zhp_orig->zfs_user_props,
 546                     &zhp->zfs_user_props, 0) != 0) {
 547                         (void) no_memory(zhp->zfs_hdl);
 548                         zfs_close(zhp);
 549                         return (NULL);
 550                 }
 551         }
 552         if (zhp_orig->zfs_recvd_props != NULL) {
 553                 if (nvlist_dup(zhp_orig->zfs_recvd_props,
 554                     &zhp->zfs_recvd_props, 0)) {
 555                         (void) no_memory(zhp->zfs_hdl);
 556                         zfs_close(zhp);
 557                         return (NULL);
 558                 }
 559         }
 560         zhp->zfs_mntcheck = zhp_orig->zfs_mntcheck;
 561         if (zhp_orig->zfs_mntopts != NULL) {
 562                 zhp->zfs_mntopts = zfs_strdup(zhp_orig->zfs_hdl,
 563                     zhp_orig->zfs_mntopts);
 564         }
 565         zhp->zfs_props_table = zhp_orig->zfs_props_table;
 566         return (zhp);
 567 }
 568 
 569 boolean_t
 570 zfs_bookmark_exists(const char *path)
 571 {
 572         nvlist_t *bmarks;
 573         nvlist_t *props;
 574         char fsname[ZFS_MAX_DATASET_NAME_LEN];
 575         char *bmark_name;
 576         char *pound;
 577         int err;
 578         boolean_t rv;
 579 
 580 
 581         (void) strlcpy(fsname, path, sizeof (fsname));
 582         pound = strchr(fsname, '#');
 583         if (pound == NULL)
 584                 return (B_FALSE);
 585 
 586         *pound = '\0';
 587         bmark_name = pound + 1;
 588         props = fnvlist_alloc();
 589         err = lzc_get_bookmarks(fsname, props, &bmarks);
 590         nvlist_free(props);
 591         if (err != 0) {
 592                 nvlist_free(bmarks);
 593                 return (B_FALSE);
 594         }
 595 
 596         rv = nvlist_exists(bmarks, bmark_name);
 597         nvlist_free(bmarks);
 598         return (rv);
 599 }
 600 
 601 zfs_handle_t *
 602 make_bookmark_handle(zfs_handle_t *parent, const char *path,
 603     nvlist_t *bmark_props)
 604 {
 605         zfs_handle_t *zhp = calloc(sizeof (zfs_handle_t), 1);
 606 
 607         if (zhp == NULL)
 608                 return (NULL);
 609 
 610         /* Fill in the name. */
 611         zhp->zfs_hdl = parent->zfs_hdl;
 612         (void) strlcpy(zhp->zfs_name, path, sizeof (zhp->zfs_name));
 613 
 614         /* Set the property lists. */
 615         if (nvlist_dup(bmark_props, &zhp->zfs_props, 0) != 0) {
 616                 free(zhp);
 617                 return (NULL);
 618         }
 619 
 620         /* Set the types. */
 621         zhp->zfs_head_type = parent->zfs_head_type;
 622         zhp->zfs_type = ZFS_TYPE_BOOKMARK;
 623 
 624         if ((zhp->zpool_hdl = zpool_handle(zhp)) == NULL) {
 625                 nvlist_free(zhp->zfs_props);
 626                 free(zhp);
 627                 return (NULL);
 628         }
 629 
 630         return (zhp);
 631 }
 632 
 633 struct zfs_open_bookmarks_cb_data {
 634         const char *path;
 635         zfs_handle_t *zhp;
 636 };
 637 
 638 static int
 639 zfs_open_bookmarks_cb(zfs_handle_t *zhp, void *data)
 640 {
 641         struct zfs_open_bookmarks_cb_data *dp = data;
 642 
 643         /*
 644          * Is it the one we are looking for?
 645          */
 646         if (strcmp(dp->path, zfs_get_name(zhp)) == 0) {
 647                 /*
 648                  * We found it.  Save it and let the caller know we are done.
 649                  */
 650                 dp->zhp = zhp;
 651                 return (EEXIST);
 652         }
 653 
 654         /*
 655          * Not found.  Close the handle and ask for another one.
 656          */
 657         zfs_close(zhp);
 658         return (0);
 659 }
 660 
 661 /*
 662  * Opens the given snapshot, bookmark, filesystem, or volume.   The 'types'
 663  * argument is a mask of acceptable types.  The function will print an
 664  * appropriate error message and return NULL if it can't be opened.
 665  */
 666 zfs_handle_t *
 667 zfs_open(libzfs_handle_t *hdl, const char *path, int types)
 668 {
 669         zfs_handle_t *zhp;
 670         char errbuf[1024];
 671         char *bookp;
 672 
 673         (void) snprintf(errbuf, sizeof (errbuf),
 674             dgettext(TEXT_DOMAIN, "cannot open '%s'"), path);
 675 
 676         /*
 677          * Validate the name before we even try to open it.
 678          */
 679         if (!zfs_validate_name(hdl, path, types, B_FALSE)) {
 680                 (void) zfs_error(hdl, EZFS_INVALIDNAME, errbuf);
 681                 return (NULL);
 682         }
 683 
 684         /*
 685          * Bookmarks needs to be handled separately.
 686          */
 687         bookp = strchr(path, '#');
 688         if (bookp == NULL) {
 689                 /*
 690                  * Try to get stats for the dataset, which will tell us if it
 691                  * exists.
 692                  */
 693                 errno = 0;
 694                 if ((zhp = make_dataset_handle(hdl, path)) == NULL) {
 695                         (void) zfs_standard_error(hdl, errno, errbuf);
 696                         return (NULL);
 697                 }
 698         } else {
 699                 char dsname[ZFS_MAX_DATASET_NAME_LEN];
 700                 zfs_handle_t *pzhp;
 701                 struct zfs_open_bookmarks_cb_data cb_data = {path, NULL};
 702 
 703                 /*
 704                  * We need to cut out '#' and everything after '#'
 705                  * to get the parent dataset name only.
 706                  */
 707                 assert(bookp - path < sizeof (dsname));
 708                 (void) strncpy(dsname, path, bookp - path);
 709                 dsname[bookp - path] = '\0';
 710 
 711                 /*
 712                  * Create handle for the parent dataset.
 713                  */
 714                 errno = 0;
 715                 if ((pzhp = make_dataset_handle(hdl, dsname)) == NULL) {
 716                         (void) zfs_standard_error(hdl, errno, errbuf);
 717                         return (NULL);
 718                 }
 719 
 720                 /*
 721                  * Iterate bookmarks to find the right one.
 722                  */
 723                 errno = 0;
 724                 if ((zfs_iter_bookmarks(pzhp, zfs_open_bookmarks_cb,
 725                     &cb_data) == 0) && (cb_data.zhp == NULL)) {
 726                         (void) zfs_error(hdl, EZFS_NOENT, errbuf);
 727                         zfs_close(pzhp);
 728                         return (NULL);
 729                 }
 730                 if (cb_data.zhp == NULL) {
 731                         (void) zfs_standard_error(hdl, errno, errbuf);
 732                         zfs_close(pzhp);
 733                         return (NULL);
 734                 }
 735                 zhp = cb_data.zhp;
 736 
 737                 /*
 738                  * Cleanup.
 739                  */
 740                 zfs_close(pzhp);
 741         }
 742 
 743         if (!(types & zhp->zfs_type)) {
 744                 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf);
 745                 zfs_close(zhp);
 746                 return (NULL);
 747         }
 748 
 749         return (zhp);
 750 }
 751 
 752 /*
 753  * Release a ZFS handle.  Nothing to do but free the associated memory.
 754  */
 755 void
 756 zfs_close(zfs_handle_t *zhp)
 757 {
 758         if (zhp->zfs_mntopts)
 759                 free(zhp->zfs_mntopts);
 760         nvlist_free(zhp->zfs_props);
 761         nvlist_free(zhp->zfs_user_props);
 762         nvlist_free(zhp->zfs_recvd_props);
 763         free(zhp);
 764 }
 765 
 766 typedef struct mnttab_node {
 767         struct mnttab mtn_mt;
 768         avl_node_t mtn_node;
 769 } mnttab_node_t;
 770 
 771 static int
 772 libzfs_mnttab_cache_compare(const void *arg1, const void *arg2)
 773 {
 774         const mnttab_node_t *mtn1 = arg1;
 775         const mnttab_node_t *mtn2 = arg2;
 776         int rv;
 777 
 778         rv = strcmp(mtn1->mtn_mt.mnt_special, mtn2->mtn_mt.mnt_special);
 779 
 780         if (rv == 0)
 781                 return (0);
 782         return (rv > 0 ? 1 : -1);
 783 }
 784 
 785 void
 786 libzfs_mnttab_init(libzfs_handle_t *hdl)
 787 {

 788         assert(avl_numnodes(&hdl->libzfs_mnttab_cache) == 0);
 789         avl_create(&hdl->libzfs_mnttab_cache, libzfs_mnttab_cache_compare,
 790             sizeof (mnttab_node_t), offsetof(mnttab_node_t, mtn_node));
 791 }
 792 
 793 void
 794 libzfs_mnttab_update(libzfs_handle_t *hdl)
 795 {
 796         struct mnttab entry;
 797 
 798         rewind(hdl->libzfs_mnttab);
 799         while (getmntent(hdl->libzfs_mnttab, &entry) == 0) {
 800                 mnttab_node_t *mtn;
 801 
 802                 if (strcmp(entry.mnt_fstype, MNTTYPE_ZFS) != 0)
 803                         continue;
 804                 mtn = zfs_alloc(hdl, sizeof (mnttab_node_t));
 805                 mtn->mtn_mt.mnt_special = zfs_strdup(hdl, entry.mnt_special);
 806                 mtn->mtn_mt.mnt_mountp = zfs_strdup(hdl, entry.mnt_mountp);
 807                 mtn->mtn_mt.mnt_fstype = zfs_strdup(hdl, entry.mnt_fstype);
 808                 mtn->mtn_mt.mnt_mntopts = zfs_strdup(hdl, entry.mnt_mntopts);
 809                 avl_add(&hdl->libzfs_mnttab_cache, mtn);
 810         }
 811 }
 812 
 813 void
 814 libzfs_mnttab_fini(libzfs_handle_t *hdl)
 815 {
 816         void *cookie = NULL;
 817         mnttab_node_t *mtn;
 818 
 819         while ((mtn = avl_destroy_nodes(&hdl->libzfs_mnttab_cache, &cookie))
 820             != NULL) {
 821                 free(mtn->mtn_mt.mnt_special);
 822                 free(mtn->mtn_mt.mnt_mountp);
 823                 free(mtn->mtn_mt.mnt_fstype);
 824                 free(mtn->mtn_mt.mnt_mntopts);
 825                 free(mtn);
 826         }
 827         avl_destroy(&hdl->libzfs_mnttab_cache);

 828 }
 829 
 830 void
 831 libzfs_mnttab_cache(libzfs_handle_t *hdl, boolean_t enable)
 832 {
 833         hdl->libzfs_mnttab_enable = enable;
 834 }
 835 
 836 int
 837 libzfs_mnttab_find(libzfs_handle_t *hdl, const char *fsname,
 838     struct mnttab *entry)
 839 {
 840         mnttab_node_t find;
 841         mnttab_node_t *mtn;

 842 
 843         if (!hdl->libzfs_mnttab_enable) {
 844                 struct mnttab srch = { 0 };
 845 
 846                 if (avl_numnodes(&hdl->libzfs_mnttab_cache))
 847                         libzfs_mnttab_fini(hdl);
 848                 rewind(hdl->libzfs_mnttab);
 849                 srch.mnt_special = (char *)fsname;
 850                 srch.mnt_fstype = MNTTYPE_ZFS;
 851                 if (getmntany(hdl->libzfs_mnttab, entry, &srch) == 0)
 852                         return (0);
 853                 else
 854                         return (ENOENT);
 855         }
 856 

 857         if (avl_numnodes(&hdl->libzfs_mnttab_cache) == 0)
 858                 libzfs_mnttab_update(hdl);
 859 
 860         find.mtn_mt.mnt_special = (char *)fsname;
 861         mtn = avl_find(&hdl->libzfs_mnttab_cache, &find, NULL);
 862         if (mtn) {
 863                 *entry = mtn->mtn_mt;
 864                 return (0);
 865         }
 866         return (ENOENT);

 867 }
 868 
 869 void
 870 libzfs_mnttab_add(libzfs_handle_t *hdl, const char *special,
 871     const char *mountp, const char *mntopts)
 872 {
 873         mnttab_node_t *mtn;
 874 
 875         if (avl_numnodes(&hdl->libzfs_mnttab_cache) == 0)
 876                 return;
 877         mtn = zfs_alloc(hdl, sizeof (mnttab_node_t));
 878         mtn->mtn_mt.mnt_special = zfs_strdup(hdl, special);
 879         mtn->mtn_mt.mnt_mountp = zfs_strdup(hdl, mountp);
 880         mtn->mtn_mt.mnt_fstype = zfs_strdup(hdl, MNTTYPE_ZFS);
 881         mtn->mtn_mt.mnt_mntopts = zfs_strdup(hdl, mntopts);
 882         avl_add(&hdl->libzfs_mnttab_cache, mtn);


 883 }
 884 
 885 void
 886 libzfs_mnttab_remove(libzfs_handle_t *hdl, const char *fsname)
 887 {
 888         mnttab_node_t find;
 889         mnttab_node_t *ret;
 890 

 891         find.mtn_mt.mnt_special = (char *)fsname;
 892         if ((ret = avl_find(&hdl->libzfs_mnttab_cache, (void *)&find, NULL))
 893             != NULL) {
 894                 avl_remove(&hdl->libzfs_mnttab_cache, ret);
 895                 free(ret->mtn_mt.mnt_special);
 896                 free(ret->mtn_mt.mnt_mountp);
 897                 free(ret->mtn_mt.mnt_fstype);
 898                 free(ret->mtn_mt.mnt_mntopts);
 899                 free(ret);
 900         }

 901 }
 902 
 903 int
 904 zfs_spa_version(zfs_handle_t *zhp, int *spa_version)
 905 {
 906         zpool_handle_t *zpool_handle = zhp->zpool_hdl;
 907 
 908         if (zpool_handle == NULL)
 909                 return (-1);
 910 
 911         *spa_version = zpool_get_prop_int(zpool_handle,
 912             ZPOOL_PROP_VERSION, NULL);
 913         return (0);
 914 }
 915 
 916 /*
 917  * The choice of reservation property depends on the SPA version.
 918  */
 919 static int
 920 zfs_which_resv_prop(zfs_handle_t *zhp, zfs_prop_t *resv_prop)
 921 {
 922         int spa_version;
 923 
 924         if (zfs_spa_version(zhp, &spa_version) < 0)
 925                 return (-1);
 926 
 927         if (spa_version >= SPA_VERSION_REFRESERVATION)
 928                 *resv_prop = ZFS_PROP_REFRESERVATION;
 929         else
 930                 *resv_prop = ZFS_PROP_RESERVATION;
 931 
 932         return (0);
 933 }
 934 
 935 /*
 936  * Given an nvlist of properties to set, validates that they are correct, and
 937  * parses any numeric properties (index, boolean, etc) if they are specified as
 938  * strings.
 939  */
 940 nvlist_t *
 941 zfs_valid_proplist(libzfs_handle_t *hdl, zfs_type_t type, nvlist_t *nvl,
 942     uint64_t zoned, zfs_handle_t *zhp, zpool_handle_t *zpool_hdl,
 943     const char *errbuf)
 944 {
 945         nvpair_t *elem;
 946         uint64_t intval;
 947         char *strval;
 948         zfs_prop_t prop;
 949         nvlist_t *ret;
 950         int chosen_normal = -1;
 951         int chosen_utf = -1;
 952 
 953         if (nvlist_alloc(&ret, NV_UNIQUE_NAME, 0) != 0) {
 954                 (void) no_memory(hdl);
 955                 return (NULL);
 956         }
 957 
 958         /*
 959          * Make sure this property is valid and applies to this type.
 960          */
 961 
 962         elem = NULL;
 963         while ((elem = nvlist_next_nvpair(nvl, elem)) != NULL) {
 964                 const char *propname = nvpair_name(elem);
 965 
 966                 prop = zfs_name_to_prop(propname);
 967                 if (prop == ZPROP_INVAL && zfs_prop_user(propname)) {
 968                         /*
 969                          * This is a user property: make sure it's a
 970                          * string, and that it's less than ZAP_MAXNAMELEN.
 971                          */
 972                         if (nvpair_type(elem) != DATA_TYPE_STRING) {
 973                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 974                                     "'%s' must be a string"), propname);
 975                                 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
 976                                 goto error;
 977                         }
 978 
 979                         if (strlen(nvpair_name(elem)) >= ZAP_MAXNAMELEN) {
 980                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 981                                     "property name '%s' is too long"),
 982                                     propname);
 983                                 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
 984                                 goto error;
 985                         }
 986 
 987                         (void) nvpair_value_string(elem, &strval);
 988                         if (nvlist_add_string(ret, propname, strval) != 0) {
 989                                 (void) no_memory(hdl);
 990                                 goto error;
 991                         }
 992                         continue;
 993                 }
 994 
 995                 /*
 996                  * Currently, only user properties can be modified on
 997                  * snapshots.
 998                  */
 999                 if (type == ZFS_TYPE_SNAPSHOT) {
1000                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1001                             "this property can not be modified for snapshots"));
1002                         (void) zfs_error(hdl, EZFS_PROPTYPE, errbuf);
1003                         goto error;
1004                 }
1005 
1006                 if (prop == ZPROP_INVAL && zfs_prop_userquota(propname)) {
1007                         zfs_userquota_prop_t uqtype;
1008                         char newpropname[128];
1009                         char domain[128];
1010                         uint64_t rid;
1011                         uint64_t valary[3];
1012 
1013                         if (userquota_propname_decode(propname, zoned,
1014                             &uqtype, domain, sizeof (domain), &rid) != 0) {
1015                                 zfs_error_aux(hdl,
1016                                     dgettext(TEXT_DOMAIN,
1017                                     "'%s' has an invalid user/group name"),
1018                                     propname);
1019                                 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1020                                 goto error;
1021                         }
1022 
1023                         if (uqtype != ZFS_PROP_USERQUOTA &&
1024                             uqtype != ZFS_PROP_GROUPQUOTA) {
1025                                 zfs_error_aux(hdl,
1026                                     dgettext(TEXT_DOMAIN, "'%s' is readonly"),
1027                                     propname);
1028                                 (void) zfs_error(hdl, EZFS_PROPREADONLY,
1029                                     errbuf);
1030                                 goto error;
1031                         }
1032 
1033                         if (nvpair_type(elem) == DATA_TYPE_STRING) {
1034                                 (void) nvpair_value_string(elem, &strval);
1035                                 if (strcmp(strval, "none") == 0) {
1036                                         intval = 0;
1037                                 } else if (zfs_nicestrtonum(hdl,
1038                                     strval, &intval) != 0) {
1039                                         (void) zfs_error(hdl,
1040                                             EZFS_BADPROP, errbuf);
1041                                         goto error;
1042                                 }
1043                         } else if (nvpair_type(elem) ==
1044                             DATA_TYPE_UINT64) {
1045                                 (void) nvpair_value_uint64(elem, &intval);
1046                                 if (intval == 0) {
1047                                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1048                                             "use 'none' to disable "
1049                                             "userquota/groupquota"));
1050                                         goto error;
1051                                 }
1052                         } else {
1053                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1054                                     "'%s' must be a number"), propname);
1055                                 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1056                                 goto error;
1057                         }
1058 
1059                         /*
1060                          * Encode the prop name as
1061                          * userquota@<hex-rid>-domain, to make it easy
1062                          * for the kernel to decode.
1063                          */
1064                         (void) snprintf(newpropname, sizeof (newpropname),
1065                             "%s%llx-%s", zfs_userquota_prop_prefixes[uqtype],
1066                             (longlong_t)rid, domain);
1067                         valary[0] = uqtype;
1068                         valary[1] = rid;
1069                         valary[2] = intval;
1070                         if (nvlist_add_uint64_array(ret, newpropname,
1071                             valary, 3) != 0) {
1072                                 (void) no_memory(hdl);
1073                                 goto error;
1074                         }
1075                         continue;
1076                 } else if (prop == ZPROP_INVAL && zfs_prop_written(propname)) {
1077                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1078                             "'%s' is readonly"),
1079                             propname);
1080                         (void) zfs_error(hdl, EZFS_PROPREADONLY, errbuf);
1081                         goto error;
1082                 }
1083 
1084                 if (prop == ZPROP_INVAL) {
1085                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1086                             "invalid property '%s'"), propname);
1087                         (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1088                         goto error;
1089                 }
1090 
1091                 if (!zfs_prop_valid_for_type(prop, type)) {
1092                         zfs_error_aux(hdl,
1093                             dgettext(TEXT_DOMAIN, "'%s' does not "
1094                             "apply to datasets of this type"), propname);
1095                         (void) zfs_error(hdl, EZFS_PROPTYPE, errbuf);
1096                         goto error;
1097                 }
1098 
1099                 if (zfs_prop_readonly(prop) &&
1100                     (!zfs_prop_setonce(prop) || zhp != NULL)) {
1101                         zfs_error_aux(hdl,
1102                             dgettext(TEXT_DOMAIN, "'%s' is readonly"),
1103                             propname);
1104                         (void) zfs_error(hdl, EZFS_PROPREADONLY, errbuf);
1105                         goto error;
1106                 }
1107 
1108                 if (zprop_parse_value(hdl, elem, prop, type, ret,
1109                     &strval, &intval, errbuf) != 0)
1110                         goto error;
1111 
1112                 /*
1113                  * Perform some additional checks for specific properties.
1114                  */
1115                 switch (prop) {
1116                 case ZFS_PROP_VERSION:
1117                 {
1118                         int version;
1119 
1120                         if (zhp == NULL)
1121                                 break;
1122                         version = zfs_prop_get_int(zhp, ZFS_PROP_VERSION);
1123                         if (intval < version) {
1124                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1125                                     "Can not downgrade; already at version %u"),
1126                                     version);
1127                                 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1128                                 goto error;
1129                         }
1130                         break;
1131                 }
1132 
1133                 case ZFS_PROP_VOLBLOCKSIZE:
1134                 case ZFS_PROP_RECORDSIZE:
1135                 {
1136                         int maxbs = SPA_MAXBLOCKSIZE;
1137                         if (zpool_hdl != NULL) {
1138                                 maxbs = zpool_get_prop_int(zpool_hdl,
1139                                     ZPOOL_PROP_MAXBLOCKSIZE, NULL);
1140                         }
1141                         /*
1142                          * Volumes are limited to a volblocksize of 128KB,
1143                          * because they typically service workloads with
1144                          * small random writes, which incur a large performance
1145                          * penalty with large blocks.
1146                          */
1147                         if (prop == ZFS_PROP_VOLBLOCKSIZE)
1148                                 maxbs = SPA_OLD_MAXBLOCKSIZE;
1149                         /*
1150                          * The value must be a power of two between
1151                          * SPA_MINBLOCKSIZE and maxbs.
1152                          */
1153                         if (intval < SPA_MINBLOCKSIZE ||
1154                             intval > maxbs || !ISP2(intval)) {
1155                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1156                                     "'%s' must be power of 2 from 512B "
1157                                     "to %uKB"), propname, maxbs >> 10);
1158                                 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1159                                 goto error;
1160                         }
1161                         break;
1162                 }
1163                 case ZFS_PROP_MLSLABEL:
1164                 {
1165                         /*
1166                          * Verify the mlslabel string and convert to
1167                          * internal hex label string.
1168                          */
1169 
1170                         m_label_t *new_sl;
1171                         char *hex = NULL;       /* internal label string */
1172 
1173                         /* Default value is already OK. */
1174                         if (strcasecmp(strval, ZFS_MLSLABEL_DEFAULT) == 0)
1175                                 break;
1176 
1177                         /* Verify the label can be converted to binary form */
1178                         if (((new_sl = m_label_alloc(MAC_LABEL)) == NULL) ||
1179                             (str_to_label(strval, &new_sl, MAC_LABEL,
1180                             L_NO_CORRECTION, NULL) == -1)) {
1181                                 goto badlabel;
1182                         }
1183 
1184                         /* Now translate to hex internal label string */
1185                         if (label_to_str(new_sl, &hex, M_INTERNAL,
1186                             DEF_NAMES) != 0) {
1187                                 if (hex)
1188                                         free(hex);
1189                                 goto badlabel;
1190                         }
1191                         m_label_free(new_sl);
1192 
1193                         /* If string is already in internal form, we're done. */
1194                         if (strcmp(strval, hex) == 0) {
1195                                 free(hex);
1196                                 break;
1197                         }
1198 
1199                         /* Replace the label string with the internal form. */
1200                         (void) nvlist_remove(ret, zfs_prop_to_name(prop),
1201                             DATA_TYPE_STRING);
1202                         verify(nvlist_add_string(ret, zfs_prop_to_name(prop),
1203                             hex) == 0);
1204                         free(hex);
1205 
1206                         break;
1207 
1208 badlabel:
1209                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1210                             "invalid mlslabel '%s'"), strval);
1211                         (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1212                         m_label_free(new_sl);   /* OK if null */
1213                         goto error;
1214 
1215                 }
1216 
1217                 case ZFS_PROP_MOUNTPOINT:
1218                 {
1219                         namecheck_err_t why;
1220 
1221                         if (strcmp(strval, ZFS_MOUNTPOINT_NONE) == 0 ||
1222                             strcmp(strval, ZFS_MOUNTPOINT_LEGACY) == 0)
1223                                 break;
1224 
1225                         if (mountpoint_namecheck(strval, &why)) {
1226                                 switch (why) {
1227                                 case NAME_ERR_LEADING_SLASH:
1228                                         zfs_error_aux(hdl,
1229                                             dgettext(TEXT_DOMAIN,
1230                                             "'%s' must be an absolute path, "
1231                                             "'none', or 'legacy'"), propname);
1232                                         break;
1233                                 case NAME_ERR_TOOLONG:
1234                                         zfs_error_aux(hdl,
1235                                             dgettext(TEXT_DOMAIN,
1236                                             "component of '%s' is too long"),
1237                                             propname);
1238                                         break;
1239 
1240                                 default:
1241                                         zfs_error_aux(hdl,
1242                                             dgettext(TEXT_DOMAIN,
1243                                             "(%d) not defined"),
1244                                             why);
1245                                         break;
1246                                 }
1247                                 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1248                                 goto error;
1249                         }
1250                 }
1251 
1252                         /*FALLTHRU*/
1253 
1254                 case ZFS_PROP_SHARESMB:
1255                 case ZFS_PROP_SHARENFS:
1256                         /*
1257                          * For the mountpoint and sharenfs or sharesmb
1258                          * properties, check if it can be set in a
1259                          * global/non-global zone based on
1260                          * the zoned property value:
1261                          *
1262                          *              global zone         non-global zone
1263                          * --------------------------------------------------
1264                          * zoned=on     mountpoint (no)     mountpoint (yes)
1265                          *              sharenfs (no)       sharenfs (no)
1266                          *              sharesmb (no)       sharesmb (no)
1267                          *
1268                          * zoned=off    mountpoint (yes)        N/A
1269                          *              sharenfs (yes)
1270                          *              sharesmb (yes)
1271                          */
1272                         if (zoned) {
1273                                 if (getzoneid() == GLOBAL_ZONEID) {
1274                                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1275                                             "'%s' cannot be set on "
1276                                             "dataset in a non-global zone"),
1277                                             propname);
1278                                         (void) zfs_error(hdl, EZFS_ZONED,
1279                                             errbuf);
1280                                         goto error;
1281                                 } else if (prop == ZFS_PROP_SHARENFS ||
1282                                     prop == ZFS_PROP_SHARESMB) {
1283                                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1284                                             "'%s' cannot be set in "
1285                                             "a non-global zone"), propname);
1286                                         (void) zfs_error(hdl, EZFS_ZONED,
1287                                             errbuf);
1288                                         goto error;
1289                                 }
1290                         } else if (getzoneid() != GLOBAL_ZONEID) {
1291                                 /*
1292                                  * If zoned property is 'off', this must be in
1293                                  * a global zone. If not, something is wrong.
1294                                  */
1295                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1296                                     "'%s' cannot be set while dataset "
1297                                     "'zoned' property is set"), propname);
1298                                 (void) zfs_error(hdl, EZFS_ZONED, errbuf);
1299                                 goto error;
1300                         }
1301 
1302                         /*
1303                          * At this point, it is legitimate to set the
1304                          * property. Now we want to make sure that the
1305                          * property value is valid if it is sharenfs.
1306                          */
1307                         if ((prop == ZFS_PROP_SHARENFS ||
1308                             prop == ZFS_PROP_SHARESMB) &&
1309                             strcmp(strval, "on") != 0 &&
1310                             strcmp(strval, "off") != 0) {
1311                                 zfs_share_proto_t proto;
1312 
1313                                 if (prop == ZFS_PROP_SHARESMB)
1314                                         proto = PROTO_SMB;
1315                                 else
1316                                         proto = PROTO_NFS;
1317 
1318                                 /*
1319                                  * Must be an valid sharing protocol
1320                                  * option string so init the libshare
1321                                  * in order to enable the parser and
1322                                  * then parse the options. We use the
1323                                  * control API since we don't care about
1324                                  * the current configuration and don't
1325                                  * want the overhead of loading it
1326                                  * until we actually do something.
1327                                  */
1328 
1329                                 if (zfs_init_libshare(hdl,
1330                                     SA_INIT_CONTROL_API) != SA_OK) {
1331                                         /*
1332                                          * An error occurred so we can't do
1333                                          * anything
1334                                          */
1335                                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1336                                             "'%s' cannot be set: problem "
1337                                             "in share initialization"),
1338                                             propname);
1339                                         (void) zfs_error(hdl, EZFS_BADPROP,
1340                                             errbuf);
1341                                         goto error;
1342                                 }
1343 
1344                                 if (zfs_parse_options(strval, proto) != SA_OK) {
1345                                         /*
1346                                          * There was an error in parsing so
1347                                          * deal with it by issuing an error
1348                                          * message and leaving after
1349                                          * uninitializing the the libshare
1350                                          * interface.
1351                                          */
1352                                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1353                                             "'%s' cannot be set to invalid "
1354                                             "options"), propname);
1355                                         (void) zfs_error(hdl, EZFS_BADPROP,
1356                                             errbuf);
1357                                         zfs_uninit_libshare(hdl);
1358                                         goto error;
1359                                 }
1360                                 zfs_uninit_libshare(hdl);
1361                         }
1362 
1363                         break;
1364 
1365                 case ZFS_PROP_UTF8ONLY:
1366                         chosen_utf = (int)intval;
1367                         break;
1368 
1369                 case ZFS_PROP_NORMALIZE:
1370                         chosen_normal = (int)intval;
1371                         break;
1372 
1373                 default:
1374                         break;
1375                 }
1376 
1377                 /*
1378                  * For changes to existing volumes, we have some additional
1379                  * checks to enforce.
1380                  */
1381                 if (type == ZFS_TYPE_VOLUME && zhp != NULL) {
1382                         uint64_t volsize = zfs_prop_get_int(zhp,
1383                             ZFS_PROP_VOLSIZE);
1384                         uint64_t blocksize = zfs_prop_get_int(zhp,
1385                             ZFS_PROP_VOLBLOCKSIZE);
1386                         char buf[64];
1387 
1388                         switch (prop) {
1389                         case ZFS_PROP_RESERVATION:
1390                         case ZFS_PROP_REFRESERVATION:
1391                                 if (intval > volsize) {
1392                                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1393                                             "'%s' is greater than current "
1394                                             "volume size"), propname);
1395                                         (void) zfs_error(hdl, EZFS_BADPROP,
1396                                             errbuf);
1397                                         goto error;
1398                                 }
1399                                 break;
1400 
1401                         case ZFS_PROP_VOLSIZE:
1402                                 if (intval % blocksize != 0) {
1403                                         zfs_nicenum(blocksize, buf,
1404                                             sizeof (buf));
1405                                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1406                                             "'%s' must be a multiple of "
1407                                             "volume block size (%s)"),
1408                                             propname, buf);
1409                                         (void) zfs_error(hdl, EZFS_BADPROP,
1410                                             errbuf);
1411                                         goto error;
1412                                 }
1413 
1414                                 if (intval == 0) {
1415                                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1416                                             "'%s' cannot be zero"),
1417                                             propname);
1418                                         (void) zfs_error(hdl, EZFS_BADPROP,
1419                                             errbuf);
1420                                         goto error;
1421                                 }
1422                                 break;
1423 
1424                         default:
1425                                 break;
1426                         }
1427                 }
1428         }
1429 
1430         /*
1431          * If normalization was chosen, but no UTF8 choice was made,
1432          * enforce rejection of non-UTF8 names.
1433          *
1434          * If normalization was chosen, but rejecting non-UTF8 names
1435          * was explicitly not chosen, it is an error.
1436          */
1437         if (chosen_normal > 0 && chosen_utf < 0) {
1438                 if (nvlist_add_uint64(ret,
1439                     zfs_prop_to_name(ZFS_PROP_UTF8ONLY), 1) != 0) {
1440                         (void) no_memory(hdl);
1441                         goto error;
1442                 }
1443         } else if (chosen_normal > 0 && chosen_utf == 0) {
1444                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1445                     "'%s' must be set 'on' if normalization chosen"),
1446                     zfs_prop_to_name(ZFS_PROP_UTF8ONLY));
1447                 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1448                 goto error;
1449         }
1450         return (ret);
1451 
1452 error:
1453         nvlist_free(ret);
1454         return (NULL);
1455 }
1456 
1457 int
1458 zfs_add_synthetic_resv(zfs_handle_t *zhp, nvlist_t *nvl)
1459 {
1460         uint64_t old_volsize;
1461         uint64_t new_volsize;
1462         uint64_t old_reservation;
1463         uint64_t new_reservation;
1464         zfs_prop_t resv_prop;
1465         nvlist_t *props;
1466 
1467         /*
1468          * If this is an existing volume, and someone is setting the volsize,
1469          * make sure that it matches the reservation, or add it if necessary.
1470          */
1471         old_volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE);
1472         if (zfs_which_resv_prop(zhp, &resv_prop) < 0)
1473                 return (-1);
1474         old_reservation = zfs_prop_get_int(zhp, resv_prop);
1475 
1476         props = fnvlist_alloc();
1477         fnvlist_add_uint64(props, zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE),
1478             zfs_prop_get_int(zhp, ZFS_PROP_VOLBLOCKSIZE));
1479 
1480         if ((zvol_volsize_to_reservation(old_volsize, props) !=
1481             old_reservation) || nvlist_exists(nvl,
1482             zfs_prop_to_name(resv_prop))) {
1483                 fnvlist_free(props);
1484                 return (0);
1485         }
1486         if (nvlist_lookup_uint64(nvl, zfs_prop_to_name(ZFS_PROP_VOLSIZE),
1487             &new_volsize) != 0) {
1488                 fnvlist_free(props);
1489                 return (-1);
1490         }
1491         new_reservation = zvol_volsize_to_reservation(new_volsize, props);
1492         fnvlist_free(props);
1493 
1494         if (nvlist_add_uint64(nvl, zfs_prop_to_name(resv_prop),
1495             new_reservation) != 0) {
1496                 (void) no_memory(zhp->zfs_hdl);
1497                 return (-1);
1498         }
1499         return (1);
1500 }
1501 
1502 void
1503 zfs_setprop_error(libzfs_handle_t *hdl, zfs_prop_t prop, int err,
1504     char *errbuf)
1505 {
1506         switch (err) {
1507 
1508         case ENOSPC:
1509                 /*
1510                  * For quotas and reservations, ENOSPC indicates
1511                  * something different; setting a quota or reservation
1512                  * doesn't use any disk space.
1513                  */
1514                 switch (prop) {
1515                 case ZFS_PROP_QUOTA:
1516                 case ZFS_PROP_REFQUOTA:
1517                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1518                             "size is less than current used or "
1519                             "reserved space"));
1520                         (void) zfs_error(hdl, EZFS_PROPSPACE, errbuf);
1521                         break;
1522 
1523                 case ZFS_PROP_RESERVATION:
1524                 case ZFS_PROP_REFRESERVATION:
1525                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1526                             "size is greater than available space"));
1527                         (void) zfs_error(hdl, EZFS_PROPSPACE, errbuf);
1528                         break;
1529 
1530                 default:
1531                         (void) zfs_standard_error(hdl, err, errbuf);
1532                         break;
1533                 }
1534                 break;
1535 
1536         case EBUSY:
1537                 (void) zfs_standard_error(hdl, EBUSY, errbuf);
1538                 break;
1539 
1540         case EROFS:
1541                 (void) zfs_error(hdl, EZFS_DSREADONLY, errbuf);
1542                 break;
1543 
1544         case E2BIG:
1545                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1546                     "property value too long"));
1547                 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1548                 break;
1549 
1550         case ENOTSUP:
1551                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1552                     "pool and or dataset must be upgraded to set this "
1553                     "property or value"));
1554                 (void) zfs_error(hdl, EZFS_BADVERSION, errbuf);
1555                 break;
1556 
1557         case ERANGE:
1558                 if (prop == ZFS_PROP_COMPRESSION ||
1559                     prop == ZFS_PROP_RECORDSIZE) {
1560                         (void) zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1561                             "property setting is not allowed on "
1562                             "bootable datasets"));
1563                         (void) zfs_error(hdl, EZFS_NOTSUP, errbuf);
1564                 } else if (prop == ZFS_PROP_CHECKSUM ||
1565                     prop == ZFS_PROP_DEDUP) {
1566                         (void) zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1567                             "property setting is not allowed on "
1568                             "root pools"));
1569                         (void) zfs_error(hdl, EZFS_NOTSUP, errbuf);
1570                 } else {
1571                         (void) zfs_standard_error(hdl, err, errbuf);
1572                 }
1573                 break;
1574 
1575         case EINVAL:
1576                 if (prop == ZPROP_INVAL) {
1577                         (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1578                 } else {
1579                         (void) zfs_standard_error(hdl, err, errbuf);
1580                 }
1581                 break;
1582 
1583         case EOVERFLOW:
1584                 /*
1585                  * This platform can't address a volume this big.
1586                  */
1587 #ifdef _ILP32
1588                 if (prop == ZFS_PROP_VOLSIZE) {
1589                         (void) zfs_error(hdl, EZFS_VOLTOOBIG, errbuf);
1590                         break;
1591                 }
1592 #endif
1593                 /* FALLTHROUGH */
1594         default:
1595                 (void) zfs_standard_error(hdl, err, errbuf);
1596         }
1597 }
1598 
1599 /*
1600  * Given a property name and value, set the property for the given dataset.
1601  */
1602 int
1603 zfs_prop_set(zfs_handle_t *zhp, const char *propname, const char *propval)
1604 {
1605         int ret = -1;
1606         char errbuf[1024];
1607         libzfs_handle_t *hdl = zhp->zfs_hdl;
1608         nvlist_t *nvl = NULL;
1609 
1610         (void) snprintf(errbuf, sizeof (errbuf),
1611             dgettext(TEXT_DOMAIN, "cannot set property for '%s'"),
1612             zhp->zfs_name);
1613 
1614         if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0) != 0 ||
1615             nvlist_add_string(nvl, propname, propval) != 0) {
1616                 (void) no_memory(hdl);
1617                 goto error;
1618         }
1619 
1620         ret = zfs_prop_set_list(zhp, nvl);
1621 
1622 error:
1623         nvlist_free(nvl);
1624         return (ret);
1625 }
1626 
1627 
1628 
1629 /*
1630  * Given an nvlist of property names and values, set the properties for the
1631  * given dataset.
1632  */
1633 int
1634 zfs_prop_set_list(zfs_handle_t *zhp, nvlist_t *props)
1635 {
1636         zfs_cmd_t zc = { 0 };
1637         int ret = -1;
1638         prop_changelist_t **cls = NULL;
1639         int cl_idx;
1640         char errbuf[1024];
1641         libzfs_handle_t *hdl = zhp->zfs_hdl;
1642         nvlist_t *nvl;
1643         int nvl_len;
1644         int added_resv = 0;
1645 
1646         (void) snprintf(errbuf, sizeof (errbuf),
1647             dgettext(TEXT_DOMAIN, "cannot set property for '%s'"),
1648             zhp->zfs_name);
1649 
1650         if ((nvl = zfs_valid_proplist(hdl, zhp->zfs_type, props,
1651             zfs_prop_get_int(zhp, ZFS_PROP_ZONED), zhp, zhp->zpool_hdl,
1652             errbuf)) == NULL)
1653                 goto error;
1654 
1655         /*
1656          * We have to check for any extra properties which need to be added
1657          * before computing the length of the nvlist.
1658          */
1659         for (nvpair_t *elem = nvlist_next_nvpair(nvl, NULL);
1660             elem != NULL;
1661             elem = nvlist_next_nvpair(nvl, elem)) {
1662                 if (zfs_name_to_prop(nvpair_name(elem)) == ZFS_PROP_VOLSIZE &&
1663                     (added_resv = zfs_add_synthetic_resv(zhp, nvl)) == -1) {
1664                         goto error;
1665                 }
1666         }
1667         /*
1668          * Check how many properties we're setting and allocate an array to
1669          * store changelist pointers for postfix().
1670          */
1671         nvl_len = 0;
1672         for (nvpair_t *elem = nvlist_next_nvpair(nvl, NULL);
1673             elem != NULL;
1674             elem = nvlist_next_nvpair(nvl, elem))
1675                 nvl_len++;
1676         if ((cls = calloc(nvl_len, sizeof (prop_changelist_t *))) == NULL)
1677                 goto error;
1678 
1679         cl_idx = 0;
1680         for (nvpair_t *elem = nvlist_next_nvpair(nvl, NULL);
1681             elem != NULL;
1682             elem = nvlist_next_nvpair(nvl, elem)) {
1683 
1684                 zfs_prop_t prop = zfs_name_to_prop(nvpair_name(elem));
1685 
1686                 assert(cl_idx < nvl_len);
1687                 /*
1688                  * We don't want to unmount & remount the dataset when changing
1689                  * its canmount property to 'on' or 'noauto'.  We only use
1690                  * the changelist logic to unmount when setting canmount=off.
1691                  */
1692                 if (prop != ZFS_PROP_CANMOUNT ||
1693                     (fnvpair_value_uint64(elem) == ZFS_CANMOUNT_OFF &&
1694                     zfs_is_mounted(zhp, NULL))) {
1695                         cls[cl_idx] = changelist_gather(zhp, prop, 0, 0);
1696                         if (cls[cl_idx] == NULL)
1697                                 goto error;
1698                 }
1699 
1700                 if (prop == ZFS_PROP_MOUNTPOINT &&
1701                     changelist_haszonedchild(cls[cl_idx])) {
1702                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1703                             "child dataset with inherited mountpoint is used "
1704                             "in a non-global zone"));
1705                         ret = zfs_error(hdl, EZFS_ZONED, errbuf);
1706                         goto error;
1707                 }
1708 
1709                 if (cls[cl_idx] != NULL &&
1710                     (ret = changelist_prefix(cls[cl_idx])) != 0)
1711                         goto error;
1712 
1713                 cl_idx++;
1714         }
1715         assert(cl_idx == nvl_len);
1716 
1717         /*
1718          * Execute the corresponding ioctl() to set this list of properties.
1719          */
1720         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
1721 
1722         if ((ret = zcmd_write_src_nvlist(hdl, &zc, nvl)) != 0 ||
1723             (ret = zcmd_alloc_dst_nvlist(hdl, &zc, 0)) != 0)
1724                 goto error;
1725 
1726         ret = zfs_ioctl(hdl, ZFS_IOC_SET_PROP, &zc);
1727 
1728         if (ret != 0) {
1729                 /* Get the list of unset properties back and report them. */
1730                 nvlist_t *errorprops = NULL;
1731                 if (zcmd_read_dst_nvlist(hdl, &zc, &errorprops) != 0)
1732                         goto error;
1733                 for (nvpair_t *elem = nvlist_next_nvpair(nvl, NULL);
1734                     elem != NULL;
1735                     elem = nvlist_next_nvpair(nvl, elem)) {
1736                         zfs_prop_t prop = zfs_name_to_prop(nvpair_name(elem));
1737                         zfs_setprop_error(hdl, prop, errno, errbuf);
1738                 }
1739                 nvlist_free(errorprops);
1740 
1741                 if (added_resv && errno == ENOSPC) {
1742                         /* clean up the volsize property we tried to set */
1743                         uint64_t old_volsize = zfs_prop_get_int(zhp,
1744                             ZFS_PROP_VOLSIZE);
1745                         nvlist_free(nvl);
1746                         nvl = NULL;
1747                         zcmd_free_nvlists(&zc);
1748 
1749                         if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0) != 0)
1750                                 goto error;
1751                         if (nvlist_add_uint64(nvl,
1752                             zfs_prop_to_name(ZFS_PROP_VOLSIZE),
1753                             old_volsize) != 0)
1754                                 goto error;
1755                         if (zcmd_write_src_nvlist(hdl, &zc, nvl) != 0)
1756                                 goto error;
1757                         (void) zfs_ioctl(hdl, ZFS_IOC_SET_PROP, &zc);
1758                 }
1759         } else {
1760                 for (cl_idx = 0; cl_idx < nvl_len; cl_idx++) {
1761                         if (cls[cl_idx] != NULL) {
1762                                 int clp_err = changelist_postfix(cls[cl_idx]);
1763                                 if (clp_err != 0)
1764                                         ret = clp_err;
1765                         }
1766                 }
1767 
1768                 /*
1769                  * Refresh the statistics so the new property value
1770                  * is reflected.
1771                  */
1772                 if (ret == 0)
1773                         (void) get_stats(zhp);
1774         }
1775 
1776 error:
1777         nvlist_free(nvl);
1778         zcmd_free_nvlists(&zc);
1779         if (cls != NULL) {
1780                 for (cl_idx = 0; cl_idx < nvl_len; cl_idx++) {
1781                         if (cls[cl_idx] != NULL)
1782                                 changelist_free(cls[cl_idx]);
1783                 }
1784                 free(cls);
1785         }
1786         return (ret);
1787 }
1788 
1789 /*
1790  * Given a property, inherit the value from the parent dataset, or if received
1791  * is TRUE, revert to the received value, if any.
1792  */
1793 int
1794 zfs_prop_inherit(zfs_handle_t *zhp, const char *propname, boolean_t received)
1795 {
1796         zfs_cmd_t zc = { 0 };
1797         int ret;
1798         prop_changelist_t *cl;
1799         libzfs_handle_t *hdl = zhp->zfs_hdl;
1800         char errbuf[1024];
1801         zfs_prop_t prop;
1802 
1803         (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
1804             "cannot inherit %s for '%s'"), propname, zhp->zfs_name);
1805 
1806         zc.zc_cookie = received;
1807         if ((prop = zfs_name_to_prop(propname)) == ZPROP_INVAL) {
1808                 /*
1809                  * For user properties, the amount of work we have to do is very
1810                  * small, so just do it here.
1811                  */
1812                 if (!zfs_prop_user(propname)) {
1813                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1814                             "invalid property"));
1815                         return (zfs_error(hdl, EZFS_BADPROP, errbuf));
1816                 }
1817 
1818                 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
1819                 (void) strlcpy(zc.zc_value, propname, sizeof (zc.zc_value));
1820 
1821                 if (zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_INHERIT_PROP, &zc) != 0)
1822                         return (zfs_standard_error(hdl, errno, errbuf));
1823 
1824                 return (0);
1825         }
1826 
1827         /*
1828          * Verify that this property is inheritable.
1829          */
1830         if (zfs_prop_readonly(prop))
1831                 return (zfs_error(hdl, EZFS_PROPREADONLY, errbuf));
1832 
1833         if (!zfs_prop_inheritable(prop) && !received)
1834                 return (zfs_error(hdl, EZFS_PROPNONINHERIT, errbuf));
1835 
1836         /*
1837          * Check to see if the value applies to this type
1838          */
1839         if (!zfs_prop_valid_for_type(prop, zhp->zfs_type))
1840                 return (zfs_error(hdl, EZFS_PROPTYPE, errbuf));
1841 
1842         /*
1843          * Normalize the name, to get rid of shorthand abbreviations.
1844          */
1845         propname = zfs_prop_to_name(prop);
1846         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
1847         (void) strlcpy(zc.zc_value, propname, sizeof (zc.zc_value));
1848 
1849         if (prop == ZFS_PROP_MOUNTPOINT && getzoneid() == GLOBAL_ZONEID &&
1850             zfs_prop_get_int(zhp, ZFS_PROP_ZONED)) {
1851                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1852                     "dataset is used in a non-global zone"));
1853                 return (zfs_error(hdl, EZFS_ZONED, errbuf));
1854         }
1855 
1856         /*
1857          * Determine datasets which will be affected by this change, if any.
1858          */
1859         if ((cl = changelist_gather(zhp, prop, 0, 0)) == NULL)
1860                 return (-1);
1861 
1862         if (prop == ZFS_PROP_MOUNTPOINT && changelist_haszonedchild(cl)) {
1863                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1864                     "child dataset with inherited mountpoint is used "
1865                     "in a non-global zone"));
1866                 ret = zfs_error(hdl, EZFS_ZONED, errbuf);
1867                 goto error;
1868         }
1869 
1870         if ((ret = changelist_prefix(cl)) != 0)
1871                 goto error;
1872 
1873         if ((ret = zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_INHERIT_PROP, &zc)) != 0) {
1874                 return (zfs_standard_error(hdl, errno, errbuf));
1875         } else {
1876 
1877                 if ((ret = changelist_postfix(cl)) != 0)
1878                         goto error;
1879 
1880                 /*
1881                  * Refresh the statistics so the new property is reflected.
1882                  */
1883                 (void) get_stats(zhp);
1884         }
1885 
1886 error:
1887         changelist_free(cl);
1888         return (ret);
1889 }
1890 
1891 /*
1892  * True DSL properties are stored in an nvlist.  The following two functions
1893  * extract them appropriately.
1894  */
1895 static uint64_t
1896 getprop_uint64(zfs_handle_t *zhp, zfs_prop_t prop, char **source)
1897 {
1898         nvlist_t *nv;
1899         uint64_t value;
1900 
1901         *source = NULL;
1902         if (nvlist_lookup_nvlist(zhp->zfs_props,
1903             zfs_prop_to_name(prop), &nv) == 0) {
1904                 verify(nvlist_lookup_uint64(nv, ZPROP_VALUE, &value) == 0);
1905                 (void) nvlist_lookup_string(nv, ZPROP_SOURCE, source);
1906         } else {
1907                 verify(!zhp->zfs_props_table ||
1908                     zhp->zfs_props_table[prop] == B_TRUE);
1909                 value = zfs_prop_default_numeric(prop);
1910                 *source = "";
1911         }
1912 
1913         return (value);
1914 }
1915 
1916 static const char *
1917 getprop_string(zfs_handle_t *zhp, zfs_prop_t prop, char **source)
1918 {
1919         nvlist_t *nv;
1920         const char *value;
1921 
1922         *source = NULL;
1923         if (nvlist_lookup_nvlist(zhp->zfs_props,
1924             zfs_prop_to_name(prop), &nv) == 0) {
1925                 value = fnvlist_lookup_string(nv, ZPROP_VALUE);
1926                 (void) nvlist_lookup_string(nv, ZPROP_SOURCE, source);
1927         } else {
1928                 verify(!zhp->zfs_props_table ||
1929                     zhp->zfs_props_table[prop] == B_TRUE);
1930                 value = zfs_prop_default_string(prop);
1931                 *source = "";
1932         }
1933 
1934         return (value);
1935 }
1936 
1937 static boolean_t
1938 zfs_is_recvd_props_mode(zfs_handle_t *zhp)
1939 {
1940         return (zhp->zfs_props == zhp->zfs_recvd_props);
1941 }
1942 
1943 static void
1944 zfs_set_recvd_props_mode(zfs_handle_t *zhp, uint64_t *cookie)
1945 {
1946         *cookie = (uint64_t)(uintptr_t)zhp->zfs_props;
1947         zhp->zfs_props = zhp->zfs_recvd_props;
1948 }
1949 
1950 static void
1951 zfs_unset_recvd_props_mode(zfs_handle_t *zhp, uint64_t *cookie)
1952 {
1953         zhp->zfs_props = (nvlist_t *)(uintptr_t)*cookie;
1954         *cookie = 0;
1955 }
1956 
1957 /*
1958  * Internal function for getting a numeric property.  Both zfs_prop_get() and
1959  * zfs_prop_get_int() are built using this interface.
1960  *
1961  * Certain properties can be overridden using 'mount -o'.  In this case, scan
1962  * the contents of the /etc/mnttab entry, searching for the appropriate options.
1963  * If they differ from the on-disk values, report the current values and mark
1964  * the source "temporary".
1965  */
1966 static int
1967 get_numeric_property(zfs_handle_t *zhp, zfs_prop_t prop, zprop_source_t *src,
1968     char **source, uint64_t *val)
1969 {
1970         zfs_cmd_t zc = { 0 };
1971         nvlist_t *zplprops = NULL;
1972         struct mnttab mnt;
1973         char *mntopt_on = NULL;
1974         char *mntopt_off = NULL;
1975         boolean_t received = zfs_is_recvd_props_mode(zhp);
1976 
1977         *source = NULL;
1978 
1979         switch (prop) {
1980         case ZFS_PROP_ATIME:
1981                 mntopt_on = MNTOPT_ATIME;
1982                 mntopt_off = MNTOPT_NOATIME;
1983                 break;
1984 
1985         case ZFS_PROP_DEVICES:
1986                 mntopt_on = MNTOPT_DEVICES;
1987                 mntopt_off = MNTOPT_NODEVICES;
1988                 break;
1989 
1990         case ZFS_PROP_EXEC:
1991                 mntopt_on = MNTOPT_EXEC;
1992                 mntopt_off = MNTOPT_NOEXEC;
1993                 break;
1994 
1995         case ZFS_PROP_READONLY:
1996                 mntopt_on = MNTOPT_RO;
1997                 mntopt_off = MNTOPT_RW;
1998                 break;
1999 
2000         case ZFS_PROP_SETUID:
2001                 mntopt_on = MNTOPT_SETUID;
2002                 mntopt_off = MNTOPT_NOSETUID;
2003                 break;
2004 
2005         case ZFS_PROP_XATTR:
2006                 mntopt_on = MNTOPT_XATTR;
2007                 mntopt_off = MNTOPT_NOXATTR;
2008                 break;
2009 
2010         case ZFS_PROP_NBMAND:
2011                 mntopt_on = MNTOPT_NBMAND;
2012                 mntopt_off = MNTOPT_NONBMAND;
2013                 break;
2014 
2015         default:
2016                 break;
2017         }
2018 
2019         /*
2020          * Because looking up the mount options is potentially expensive
2021          * (iterating over all of /etc/mnttab), we defer its calculation until
2022          * we're looking up a property which requires its presence.
2023          */
2024         if (!zhp->zfs_mntcheck &&
2025             (mntopt_on != NULL || prop == ZFS_PROP_MOUNTED)) {
2026                 libzfs_handle_t *hdl = zhp->zfs_hdl;
2027                 struct mnttab entry;
2028 
2029                 if (libzfs_mnttab_find(hdl, zhp->zfs_name, &entry) == 0) {
2030                         zhp->zfs_mntopts = zfs_strdup(hdl,
2031                             entry.mnt_mntopts);
2032                         if (zhp->zfs_mntopts == NULL)
2033                                 return (-1);
2034                 }
2035 
2036                 zhp->zfs_mntcheck = B_TRUE;
2037         }
2038 
2039         if (zhp->zfs_mntopts == NULL)
2040                 mnt.mnt_mntopts = "";
2041         else
2042                 mnt.mnt_mntopts = zhp->zfs_mntopts;
2043 
2044         switch (prop) {
2045         case ZFS_PROP_ATIME:
2046         case ZFS_PROP_DEVICES:
2047         case ZFS_PROP_EXEC:
2048         case ZFS_PROP_READONLY:
2049         case ZFS_PROP_SETUID:
2050         case ZFS_PROP_XATTR:
2051         case ZFS_PROP_NBMAND:
2052                 *val = getprop_uint64(zhp, prop, source);
2053 
2054                 if (received)
2055                         break;
2056 
2057                 if (hasmntopt(&mnt, mntopt_on) && !*val) {
2058                         *val = B_TRUE;
2059                         if (src)
2060                                 *src = ZPROP_SRC_TEMPORARY;
2061                 } else if (hasmntopt(&mnt, mntopt_off) && *val) {
2062                         *val = B_FALSE;
2063                         if (src)
2064                                 *src = ZPROP_SRC_TEMPORARY;
2065                 }
2066                 break;
2067 
2068         case ZFS_PROP_CANMOUNT:
2069         case ZFS_PROP_VOLSIZE:
2070         case ZFS_PROP_QUOTA:
2071         case ZFS_PROP_REFQUOTA:
2072         case ZFS_PROP_RESERVATION:
2073         case ZFS_PROP_REFRESERVATION:
2074         case ZFS_PROP_FILESYSTEM_LIMIT:
2075         case ZFS_PROP_SNAPSHOT_LIMIT:
2076         case ZFS_PROP_FILESYSTEM_COUNT:
2077         case ZFS_PROP_SNAPSHOT_COUNT:
2078                 *val = getprop_uint64(zhp, prop, source);
2079 
2080                 if (*source == NULL) {
2081                         /* not default, must be local */
2082                         *source = zhp->zfs_name;
2083                 }
2084                 break;
2085 
2086         case ZFS_PROP_MOUNTED:
2087                 *val = (zhp->zfs_mntopts != NULL);
2088                 break;
2089 
2090         case ZFS_PROP_NUMCLONES:
2091                 *val = zhp->zfs_dmustats.dds_num_clones;
2092                 break;
2093 
2094         case ZFS_PROP_VERSION:
2095         case ZFS_PROP_NORMALIZE:
2096         case ZFS_PROP_UTF8ONLY:
2097         case ZFS_PROP_CASE:
2098                 if (!zfs_prop_valid_for_type(prop, zhp->zfs_head_type) ||
2099                     zcmd_alloc_dst_nvlist(zhp->zfs_hdl, &zc, 0) != 0)
2100                         return (-1);
2101                 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
2102                 if (zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_OBJSET_ZPLPROPS, &zc)) {
2103                         zcmd_free_nvlists(&zc);
2104                         return (-1);
2105                 }
2106                 if (zcmd_read_dst_nvlist(zhp->zfs_hdl, &zc, &zplprops) != 0 ||
2107                     nvlist_lookup_uint64(zplprops, zfs_prop_to_name(prop),
2108                     val) != 0) {
2109                         zcmd_free_nvlists(&zc);
2110                         return (-1);
2111                 }
2112                 nvlist_free(zplprops);
2113                 zcmd_free_nvlists(&zc);
2114                 break;
2115 
2116         case ZFS_PROP_INCONSISTENT:
2117                 *val = zhp->zfs_dmustats.dds_inconsistent;
2118                 break;
2119 
2120         default:
2121                 switch (zfs_prop_get_type(prop)) {
2122                 case PROP_TYPE_NUMBER:
2123                 case PROP_TYPE_INDEX:
2124                         *val = getprop_uint64(zhp, prop, source);
2125                         /*
2126                          * If we tried to use a default value for a
2127                          * readonly property, it means that it was not
2128                          * present.  Note this only applies to "truly"
2129                          * readonly properties, not set-once properties
2130                          * like volblocksize.
2131                          */
2132                         if (zfs_prop_readonly(prop) &&
2133                             !zfs_prop_setonce(prop) &&
2134                             *source != NULL && (*source)[0] == '\0') {
2135                                 *source = NULL;
2136                                 return (-1);
2137                         }
2138                         break;
2139 
2140                 case PROP_TYPE_STRING:
2141                 default:
2142                         zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN,
2143                             "cannot get non-numeric property"));
2144                         return (zfs_error(zhp->zfs_hdl, EZFS_BADPROP,
2145                             dgettext(TEXT_DOMAIN, "internal error")));
2146                 }
2147         }
2148 
2149         return (0);
2150 }
2151 
2152 /*
2153  * Calculate the source type, given the raw source string.
2154  */
2155 static void
2156 get_source(zfs_handle_t *zhp, zprop_source_t *srctype, char *source,
2157     char *statbuf, size_t statlen)
2158 {
2159         if (statbuf == NULL || *srctype == ZPROP_SRC_TEMPORARY)
2160                 return;
2161 
2162         if (source == NULL) {
2163                 *srctype = ZPROP_SRC_NONE;
2164         } else if (source[0] == '\0') {
2165                 *srctype = ZPROP_SRC_DEFAULT;
2166         } else if (strstr(source, ZPROP_SOURCE_VAL_RECVD) != NULL) {
2167                 *srctype = ZPROP_SRC_RECEIVED;
2168         } else {
2169                 if (strcmp(source, zhp->zfs_name) == 0) {
2170                         *srctype = ZPROP_SRC_LOCAL;
2171                 } else {
2172                         (void) strlcpy(statbuf, source, statlen);
2173                         *srctype = ZPROP_SRC_INHERITED;
2174                 }
2175         }
2176 
2177 }
2178 
2179 int
2180 zfs_prop_get_recvd(zfs_handle_t *zhp, const char *propname, char *propbuf,
2181     size_t proplen, boolean_t literal)
2182 {
2183         zfs_prop_t prop;
2184         int err = 0;
2185 
2186         if (zhp->zfs_recvd_props == NULL)
2187                 if (get_recvd_props_ioctl(zhp) != 0)
2188                         return (-1);
2189 
2190         prop = zfs_name_to_prop(propname);
2191 
2192         if (prop != ZPROP_INVAL) {
2193                 uint64_t cookie;
2194                 if (!nvlist_exists(zhp->zfs_recvd_props, propname))
2195                         return (-1);
2196                 zfs_set_recvd_props_mode(zhp, &cookie);
2197                 err = zfs_prop_get(zhp, prop, propbuf, proplen,
2198                     NULL, NULL, 0, literal);
2199                 zfs_unset_recvd_props_mode(zhp, &cookie);
2200         } else {
2201                 nvlist_t *propval;
2202                 char *recvdval;
2203                 if (nvlist_lookup_nvlist(zhp->zfs_recvd_props,
2204                     propname, &propval) != 0)
2205                         return (-1);
2206                 verify(nvlist_lookup_string(propval, ZPROP_VALUE,
2207                     &recvdval) == 0);
2208                 (void) strlcpy(propbuf, recvdval, proplen);
2209         }
2210 
2211         return (err == 0 ? 0 : -1);
2212 }
2213 
2214 static int
2215 get_clones_string(zfs_handle_t *zhp, char *propbuf, size_t proplen)
2216 {
2217         nvlist_t *value;
2218         nvpair_t *pair;
2219 
2220         value = zfs_get_clones_nvl(zhp);
2221         if (value == NULL)
2222                 return (-1);
2223 
2224         propbuf[0] = '\0';
2225         for (pair = nvlist_next_nvpair(value, NULL); pair != NULL;
2226             pair = nvlist_next_nvpair(value, pair)) {
2227                 if (propbuf[0] != '\0')
2228                         (void) strlcat(propbuf, ",", proplen);
2229                 (void) strlcat(propbuf, nvpair_name(pair), proplen);
2230         }
2231 
2232         return (0);
2233 }
2234 
2235 struct get_clones_arg {
2236         uint64_t numclones;
2237         nvlist_t *value;
2238         const char *origin;
2239         char buf[ZFS_MAX_DATASET_NAME_LEN];
2240 };
2241 
2242 int
2243 get_clones_cb(zfs_handle_t *zhp, void *arg)
2244 {
2245         struct get_clones_arg *gca = arg;
2246 
2247         if (gca->numclones == 0) {
2248                 zfs_close(zhp);
2249                 return (0);
2250         }
2251 
2252         if (zfs_prop_get(zhp, ZFS_PROP_ORIGIN, gca->buf, sizeof (gca->buf),
2253             NULL, NULL, 0, B_TRUE) != 0)
2254                 goto out;
2255         if (strcmp(gca->buf, gca->origin) == 0) {
2256                 fnvlist_add_boolean(gca->value, zfs_get_name(zhp));
2257                 gca->numclones--;
2258         }
2259 
2260 out:
2261         (void) zfs_iter_children(zhp, get_clones_cb, gca);
2262         zfs_close(zhp);
2263         return (0);
2264 }
2265 
2266 nvlist_t *
2267 zfs_get_clones_nvl(zfs_handle_t *zhp)
2268 {
2269         nvlist_t *nv, *value;
2270 
2271         if (nvlist_lookup_nvlist(zhp->zfs_props,
2272             zfs_prop_to_name(ZFS_PROP_CLONES), &nv) != 0) {
2273                 struct get_clones_arg gca;
2274 
2275                 /*
2276                  * if this is a snapshot, then the kernel wasn't able
2277                  * to get the clones.  Do it by slowly iterating.
2278                  */
2279                 if (zhp->zfs_type != ZFS_TYPE_SNAPSHOT)
2280                         return (NULL);
2281                 if (nvlist_alloc(&nv, NV_UNIQUE_NAME, 0) != 0)
2282                         return (NULL);
2283                 if (nvlist_alloc(&value, NV_UNIQUE_NAME, 0) != 0) {
2284                         nvlist_free(nv);
2285                         return (NULL);
2286                 }
2287 
2288                 gca.numclones = zfs_prop_get_int(zhp, ZFS_PROP_NUMCLONES);
2289                 gca.value = value;
2290                 gca.origin = zhp->zfs_name;
2291 
2292                 if (gca.numclones != 0) {
2293                         zfs_handle_t *root;
2294                         char pool[ZFS_MAX_DATASET_NAME_LEN];
2295                         char *cp = pool;
2296 
2297                         /* get the pool name */
2298                         (void) strlcpy(pool, zhp->zfs_name, sizeof (pool));
2299                         (void) strsep(&cp, "/@");
2300                         root = zfs_open(zhp->zfs_hdl, pool,
2301                             ZFS_TYPE_FILESYSTEM);
2302 
2303                         (void) get_clones_cb(root, &gca);
2304                 }
2305 
2306                 if (gca.numclones != 0 ||
2307                     nvlist_add_nvlist(nv, ZPROP_VALUE, value) != 0 ||
2308                     nvlist_add_nvlist(zhp->zfs_props,
2309                     zfs_prop_to_name(ZFS_PROP_CLONES), nv) != 0) {
2310                         nvlist_free(nv);
2311                         nvlist_free(value);
2312                         return (NULL);
2313                 }
2314                 nvlist_free(nv);
2315                 nvlist_free(value);
2316                 verify(0 == nvlist_lookup_nvlist(zhp->zfs_props,
2317                     zfs_prop_to_name(ZFS_PROP_CLONES), &nv));
2318         }
2319 
2320         verify(nvlist_lookup_nvlist(nv, ZPROP_VALUE, &value) == 0);
2321 
2322         return (value);
2323 }
2324 
2325 /*
2326  * Accepts a property and value and checks that the value
2327  * matches the one found by the channel program. If they are
2328  * not equal, print both of them.
2329  */
2330 void
2331 zcp_check(zfs_handle_t *zhp, zfs_prop_t prop, uint64_t intval,
2332     const char *strval)
2333 {
2334         if (!zhp->zfs_hdl->libzfs_prop_debug)
2335                 return;
2336         int error;
2337         char *poolname = zhp->zpool_hdl->zpool_name;
2338         const char *program =
2339             "args = ...\n"
2340             "ds = args['dataset']\n"
2341             "prop = args['property']\n"
2342             "value, setpoint = zfs.get_prop(ds, prop)\n"
2343             "return {value=value, setpoint=setpoint}\n";
2344         nvlist_t *outnvl;
2345         nvlist_t *retnvl;
2346         nvlist_t *argnvl = fnvlist_alloc();
2347 
2348         fnvlist_add_string(argnvl, "dataset", zhp->zfs_name);
2349         fnvlist_add_string(argnvl, "property", zfs_prop_to_name(prop));
2350 
2351         error = lzc_channel_program(poolname, program,
2352             10 * 1000 * 1000, 10 * 1024 * 1024, argnvl, &outnvl);
2353 
2354         if (error == 0) {
2355                 retnvl = fnvlist_lookup_nvlist(outnvl, "return");
2356                 if (zfs_prop_get_type(prop) == PROP_TYPE_NUMBER) {
2357                         int64_t ans;
2358                         error = nvlist_lookup_int64(retnvl, "value", &ans);
2359                         if (error != 0) {
2360                                 (void) fprintf(stderr, "zcp check error: %u\n",
2361                                     error);
2362                                 return;
2363                         }
2364                         if (ans != intval) {
2365                                 (void) fprintf(stderr,
2366                                     "%s: zfs found %lld, but zcp found %lld\n",
2367                                     zfs_prop_to_name(prop),
2368                                     (longlong_t)intval, (longlong_t)ans);
2369                         }
2370                 } else {
2371                         char *str_ans;
2372                         error = nvlist_lookup_string(retnvl, "value", &str_ans);
2373                         if (error != 0) {
2374                                 (void) fprintf(stderr, "zcp check error: %u\n",
2375                                     error);
2376                                 return;
2377                         }
2378                         if (strcmp(strval, str_ans) != 0) {
2379                                 (void) fprintf(stderr,
2380                                     "%s: zfs found %s, but zcp found %s\n",
2381                                     zfs_prop_to_name(prop),
2382                                     strval, str_ans);
2383                         }
2384                 }
2385         } else {
2386                 (void) fprintf(stderr,
2387                     "zcp check failed, channel program error: %u\n", error);
2388         }
2389         nvlist_free(argnvl);
2390         nvlist_free(outnvl);
2391 }
2392 
2393 /*
2394  * Retrieve a property from the given object.  If 'literal' is specified, then
2395  * numbers are left as exact values.  Otherwise, numbers are converted to a
2396  * human-readable form.
2397  *
2398  * Returns 0 on success, or -1 on error.
2399  */
2400 int
2401 zfs_prop_get(zfs_handle_t *zhp, zfs_prop_t prop, char *propbuf, size_t proplen,
2402     zprop_source_t *src, char *statbuf, size_t statlen, boolean_t literal)
2403 {
2404         char *source = NULL;
2405         uint64_t val;
2406         const char *str;
2407         const char *strval;
2408         boolean_t received = zfs_is_recvd_props_mode(zhp);
2409 
2410         /*
2411          * Check to see if this property applies to our object
2412          */
2413         if (!zfs_prop_valid_for_type(prop, zhp->zfs_type))
2414                 return (-1);
2415 
2416         if (received && zfs_prop_readonly(prop))
2417                 return (-1);
2418 
2419         if (src)
2420                 *src = ZPROP_SRC_NONE;
2421 
2422         switch (prop) {
2423         case ZFS_PROP_CREATION:
2424                 /*
2425                  * 'creation' is a time_t stored in the statistics.  We convert
2426                  * this into a string unless 'literal' is specified.
2427                  */
2428                 {
2429                         val = getprop_uint64(zhp, prop, &source);
2430                         time_t time = (time_t)val;
2431                         struct tm t;
2432 
2433                         if (literal ||
2434                             localtime_r(&time, &t) == NULL ||
2435                             strftime(propbuf, proplen, "%a %b %e %k:%M %Y",
2436                             &t) == 0)
2437                                 (void) snprintf(propbuf, proplen, "%llu", val);
2438                 }
2439                 zcp_check(zhp, prop, val, NULL);
2440                 break;
2441 
2442         case ZFS_PROP_MOUNTPOINT:
2443                 /*
2444                  * Getting the precise mountpoint can be tricky.
2445                  *
2446                  *  - for 'none' or 'legacy', return those values.
2447                  *  - for inherited mountpoints, we want to take everything
2448                  *    after our ancestor and append it to the inherited value.
2449                  *
2450                  * If the pool has an alternate root, we want to prepend that
2451                  * root to any values we return.
2452                  */
2453 
2454                 str = getprop_string(zhp, prop, &source);
2455 
2456                 if (str[0] == '/') {
2457                         char buf[MAXPATHLEN];
2458                         char *root = buf;
2459                         const char *relpath;
2460 
2461                         /*
2462                          * If we inherit the mountpoint, even from a dataset
2463                          * with a received value, the source will be the path of
2464                          * the dataset we inherit from. If source is
2465                          * ZPROP_SOURCE_VAL_RECVD, the received value is not
2466                          * inherited.
2467                          */
2468                         if (strcmp(source, ZPROP_SOURCE_VAL_RECVD) == 0) {
2469                                 relpath = "";
2470                         } else {
2471                                 relpath = zhp->zfs_name + strlen(source);
2472                                 if (relpath[0] == '/')
2473                                         relpath++;
2474                         }
2475 
2476                         if ((zpool_get_prop(zhp->zpool_hdl,
2477                             ZPOOL_PROP_ALTROOT, buf, MAXPATHLEN, NULL,
2478                             B_FALSE)) || (strcmp(root, "-") == 0))
2479                                 root[0] = '\0';
2480                         /*
2481                          * Special case an alternate root of '/'. This will
2482                          * avoid having multiple leading slashes in the
2483                          * mountpoint path.
2484                          */
2485                         if (strcmp(root, "/") == 0)
2486                                 root++;
2487 
2488                         /*
2489                          * If the mountpoint is '/' then skip over this
2490                          * if we are obtaining either an alternate root or
2491                          * an inherited mountpoint.
2492                          */
2493                         if (str[1] == '\0' && (root[0] != '\0' ||
2494                             relpath[0] != '\0'))
2495                                 str++;
2496 
2497                         if (relpath[0] == '\0')
2498                                 (void) snprintf(propbuf, proplen, "%s%s",
2499                                     root, str);
2500                         else
2501                                 (void) snprintf(propbuf, proplen, "%s%s%s%s",
2502                                     root, str, relpath[0] == '@' ? "" : "/",
2503                                     relpath);
2504                 } else {
2505                         /* 'legacy' or 'none' */
2506                         (void) strlcpy(propbuf, str, proplen);
2507                 }
2508                 zcp_check(zhp, prop, NULL, propbuf);
2509                 break;
2510 
2511         case ZFS_PROP_ORIGIN:
2512                 str = getprop_string(zhp, prop, &source);
2513                 if (str == NULL)
2514                         return (-1);
2515                 (void) strlcpy(propbuf, str, proplen);
2516                 zcp_check(zhp, prop, NULL, str);
2517                 break;
2518 
2519         case ZFS_PROP_CLONES:
2520                 if (get_clones_string(zhp, propbuf, proplen) != 0)
2521                         return (-1);
2522                 break;
2523 
2524         case ZFS_PROP_QUOTA:
2525         case ZFS_PROP_REFQUOTA:
2526         case ZFS_PROP_RESERVATION:
2527         case ZFS_PROP_REFRESERVATION:
2528 
2529                 if (get_numeric_property(zhp, prop, src, &source, &val) != 0)
2530                         return (-1);
2531                 /*
2532                  * If quota or reservation is 0, we translate this into 'none'
2533                  * (unless literal is set), and indicate that it's the default
2534                  * value.  Otherwise, we print the number nicely and indicate
2535                  * that its set locally.
2536                  */
2537                 if (val == 0) {
2538                         if (literal)
2539                                 (void) strlcpy(propbuf, "0", proplen);
2540                         else
2541                                 (void) strlcpy(propbuf, "none", proplen);
2542                 } else {
2543                         if (literal)
2544                                 (void) snprintf(propbuf, proplen, "%llu",
2545                                     (u_longlong_t)val);
2546                         else
2547                                 zfs_nicenum(val, propbuf, proplen);
2548                 }
2549                 zcp_check(zhp, prop, val, NULL);
2550                 break;
2551 
2552         case ZFS_PROP_FILESYSTEM_LIMIT:
2553         case ZFS_PROP_SNAPSHOT_LIMIT:
2554         case ZFS_PROP_FILESYSTEM_COUNT:
2555         case ZFS_PROP_SNAPSHOT_COUNT:
2556 
2557                 if (get_numeric_property(zhp, prop, src, &source, &val) != 0)
2558                         return (-1);
2559 
2560                 /*
2561                  * If limit is UINT64_MAX, we translate this into 'none' (unless
2562                  * literal is set), and indicate that it's the default value.
2563                  * Otherwise, we print the number nicely and indicate that it's
2564                  * set locally.
2565                  */
2566                 if (literal) {
2567                         (void) snprintf(propbuf, proplen, "%llu",
2568                             (u_longlong_t)val);
2569                 } else if (val == UINT64_MAX) {
2570                         (void) strlcpy(propbuf, "none", proplen);
2571                 } else {
2572                         zfs_nicenum(val, propbuf, proplen);
2573                 }
2574 
2575                 zcp_check(zhp, prop, val, NULL);
2576                 break;
2577 
2578         case ZFS_PROP_REFRATIO:
2579         case ZFS_PROP_COMPRESSRATIO:
2580                 if (get_numeric_property(zhp, prop, src, &source, &val) != 0)
2581                         return (-1);
2582                 (void) snprintf(propbuf, proplen, "%llu.%02llux",
2583                     (u_longlong_t)(val / 100),
2584                     (u_longlong_t)(val % 100));
2585                 zcp_check(zhp, prop, val, NULL);
2586                 break;
2587 
2588         case ZFS_PROP_TYPE:
2589                 switch (zhp->zfs_type) {
2590                 case ZFS_TYPE_FILESYSTEM:
2591                         str = "filesystem";
2592                         break;
2593                 case ZFS_TYPE_VOLUME:
2594                         str = "volume";
2595                         break;
2596                 case ZFS_TYPE_SNAPSHOT:
2597                         str = "snapshot";
2598                         break;
2599                 case ZFS_TYPE_BOOKMARK:
2600                         str = "bookmark";
2601                         break;
2602                 default:
2603                         abort();
2604                 }
2605                 (void) snprintf(propbuf, proplen, "%s", str);
2606                 zcp_check(zhp, prop, NULL, propbuf);
2607                 break;
2608 
2609         case ZFS_PROP_MOUNTED:
2610                 /*
2611                  * The 'mounted' property is a pseudo-property that described
2612                  * whether the filesystem is currently mounted.  Even though
2613                  * it's a boolean value, the typical values of "on" and "off"
2614                  * don't make sense, so we translate to "yes" and "no".
2615                  */
2616                 if (get_numeric_property(zhp, ZFS_PROP_MOUNTED,
2617                     src, &source, &val) != 0)
2618                         return (-1);
2619                 if (val)
2620                         (void) strlcpy(propbuf, "yes", proplen);
2621                 else
2622                         (void) strlcpy(propbuf, "no", proplen);
2623                 break;
2624 
2625         case ZFS_PROP_NAME:
2626                 /*
2627                  * The 'name' property is a pseudo-property derived from the
2628                  * dataset name.  It is presented as a real property to simplify
2629                  * consumers.
2630                  */
2631                 (void) strlcpy(propbuf, zhp->zfs_name, proplen);
2632                 zcp_check(zhp, prop, NULL, propbuf);
2633                 break;
2634 
2635         case ZFS_PROP_MLSLABEL:
2636                 {
2637                         m_label_t *new_sl = NULL;
2638                         char *ascii = NULL;     /* human readable label */
2639 
2640                         (void) strlcpy(propbuf,
2641                             getprop_string(zhp, prop, &source), proplen);
2642 
2643                         if (literal || (strcasecmp(propbuf,
2644                             ZFS_MLSLABEL_DEFAULT) == 0))
2645                                 break;
2646 
2647                         /*
2648                          * Try to translate the internal hex string to
2649                          * human-readable output.  If there are any
2650                          * problems just use the hex string.
2651                          */
2652 
2653                         if (str_to_label(propbuf, &new_sl, MAC_LABEL,
2654                             L_NO_CORRECTION, NULL) == -1) {
2655                                 m_label_free(new_sl);
2656                                 break;
2657                         }
2658 
2659                         if (label_to_str(new_sl, &ascii, M_LABEL,
2660                             DEF_NAMES) != 0) {
2661                                 if (ascii)
2662                                         free(ascii);
2663                                 m_label_free(new_sl);
2664                                 break;
2665                         }
2666                         m_label_free(new_sl);
2667 
2668                         (void) strlcpy(propbuf, ascii, proplen);
2669                         free(ascii);
2670                 }
2671                 break;
2672 
2673         case ZFS_PROP_GUID:
2674                 /*
2675                  * GUIDs are stored as numbers, but they are identifiers.
2676                  * We don't want them to be pretty printed, because pretty
2677                  * printing mangles the ID into a truncated and useless value.
2678                  */
2679                 if (get_numeric_property(zhp, prop, src, &source, &val) != 0)
2680                         return (-1);
2681                 (void) snprintf(propbuf, proplen, "%llu", (u_longlong_t)val);
2682                 zcp_check(zhp, prop, val, NULL);
2683                 break;
2684 
2685         default:
2686                 switch (zfs_prop_get_type(prop)) {
2687                 case PROP_TYPE_NUMBER:
2688                         if (get_numeric_property(zhp, prop, src,
2689                             &source, &val) != 0) {
2690                                 return (-1);
2691                         }
2692 
2693                         if (literal) {
2694                                 (void) snprintf(propbuf, proplen, "%llu",
2695                                     (u_longlong_t)val);
2696                         } else {
2697                                 zfs_nicenum(val, propbuf, proplen);
2698                         }
2699                         zcp_check(zhp, prop, val, NULL);
2700                         break;
2701 
2702                 case PROP_TYPE_STRING:
2703                         str = getprop_string(zhp, prop, &source);
2704                         if (str == NULL)
2705                                 return (-1);
2706 
2707                         (void) strlcpy(propbuf, str, proplen);
2708                         zcp_check(zhp, prop, NULL, str);
2709                         break;
2710 
2711                 case PROP_TYPE_INDEX:
2712                         if (get_numeric_property(zhp, prop, src,
2713                             &source, &val) != 0)
2714                                 return (-1);
2715                         if (zfs_prop_index_to_string(prop, val, &strval) != 0)
2716                                 return (-1);
2717 
2718                         (void) strlcpy(propbuf, strval, proplen);
2719                         zcp_check(zhp, prop, NULL, strval);
2720                         break;
2721 
2722                 default:
2723                         abort();
2724                 }
2725         }
2726 
2727         get_source(zhp, src, source, statbuf, statlen);
2728 
2729         return (0);
2730 }
2731 
2732 /*
2733  * Utility function to get the given numeric property.  Does no validation that
2734  * the given property is the appropriate type; should only be used with
2735  * hard-coded property types.
2736  */
2737 uint64_t
2738 zfs_prop_get_int(zfs_handle_t *zhp, zfs_prop_t prop)
2739 {
2740         char *source;
2741         uint64_t val;
2742 
2743         (void) get_numeric_property(zhp, prop, NULL, &source, &val);
2744 
2745         return (val);
2746 }
2747 
2748 int
2749 zfs_prop_set_int(zfs_handle_t *zhp, zfs_prop_t prop, uint64_t val)
2750 {
2751         char buf[64];
2752 
2753         (void) snprintf(buf, sizeof (buf), "%llu", (longlong_t)val);
2754         return (zfs_prop_set(zhp, zfs_prop_to_name(prop), buf));
2755 }
2756 
2757 /*
2758  * Similar to zfs_prop_get(), but returns the value as an integer.
2759  */
2760 int
2761 zfs_prop_get_numeric(zfs_handle_t *zhp, zfs_prop_t prop, uint64_t *value,
2762     zprop_source_t *src, char *statbuf, size_t statlen)
2763 {
2764         char *source;
2765 
2766         /*
2767          * Check to see if this property applies to our object
2768          */
2769         if (!zfs_prop_valid_for_type(prop, zhp->zfs_type)) {
2770                 return (zfs_error_fmt(zhp->zfs_hdl, EZFS_PROPTYPE,
2771                     dgettext(TEXT_DOMAIN, "cannot get property '%s'"),
2772                     zfs_prop_to_name(prop)));
2773         }
2774 
2775         if (src)
2776                 *src = ZPROP_SRC_NONE;
2777 
2778         if (get_numeric_property(zhp, prop, src, &source, value) != 0)
2779                 return (-1);
2780 
2781         get_source(zhp, src, source, statbuf, statlen);
2782 
2783         return (0);
2784 }
2785 
2786 static int
2787 idmap_id_to_numeric_domain_rid(uid_t id, boolean_t isuser,
2788     char **domainp, idmap_rid_t *ridp)
2789 {
2790         idmap_get_handle_t *get_hdl = NULL;
2791         idmap_stat status;
2792         int err = EINVAL;
2793 
2794         if (idmap_get_create(&get_hdl) != IDMAP_SUCCESS)
2795                 goto out;
2796 
2797         if (isuser) {
2798                 err = idmap_get_sidbyuid(get_hdl, id,
2799                     IDMAP_REQ_FLG_USE_CACHE, domainp, ridp, &status);
2800         } else {
2801                 err = idmap_get_sidbygid(get_hdl, id,
2802                     IDMAP_REQ_FLG_USE_CACHE, domainp, ridp, &status);
2803         }
2804         if (err == IDMAP_SUCCESS &&
2805             idmap_get_mappings(get_hdl) == IDMAP_SUCCESS &&
2806             status == IDMAP_SUCCESS)
2807                 err = 0;
2808         else
2809                 err = EINVAL;
2810 out:
2811         if (get_hdl)
2812                 idmap_get_destroy(get_hdl);
2813         return (err);
2814 }
2815 
2816 /*
2817  * convert the propname into parameters needed by kernel
2818  * Eg: userquota@ahrens -> ZFS_PROP_USERQUOTA, "", 126829
2819  * Eg: userused@matt@domain -> ZFS_PROP_USERUSED, "S-1-123-456", 789
2820  */
2821 static int
2822 userquota_propname_decode(const char *propname, boolean_t zoned,
2823     zfs_userquota_prop_t *typep, char *domain, int domainlen, uint64_t *ridp)
2824 {
2825         zfs_userquota_prop_t type;
2826         char *cp, *end;
2827         char *numericsid = NULL;
2828         boolean_t isuser;
2829 
2830         domain[0] = '\0';
2831         *ridp = 0;
2832         /* Figure out the property type ({user|group}{quota|space}) */
2833         for (type = 0; type < ZFS_NUM_USERQUOTA_PROPS; type++) {
2834                 if (strncmp(propname, zfs_userquota_prop_prefixes[type],
2835                     strlen(zfs_userquota_prop_prefixes[type])) == 0)
2836                         break;
2837         }
2838         if (type == ZFS_NUM_USERQUOTA_PROPS)
2839                 return (EINVAL);
2840         *typep = type;
2841 
2842         isuser = (type == ZFS_PROP_USERQUOTA ||
2843             type == ZFS_PROP_USERUSED);
2844 
2845         cp = strchr(propname, '@') + 1;
2846 
2847         if (strchr(cp, '@')) {
2848                 /*
2849                  * It's a SID name (eg "user@domain") that needs to be
2850                  * turned into S-1-domainID-RID.
2851                  */
2852                 int flag = 0;
2853                 idmap_stat stat, map_stat;
2854                 uid_t pid;
2855                 idmap_rid_t rid;
2856                 idmap_get_handle_t *gh = NULL;
2857 
2858                 stat = idmap_get_create(&gh);
2859                 if (stat != IDMAP_SUCCESS) {
2860                         idmap_get_destroy(gh);
2861                         return (ENOMEM);
2862                 }
2863                 if (zoned && getzoneid() == GLOBAL_ZONEID)
2864                         return (ENOENT);
2865                 if (isuser) {
2866                         stat = idmap_getuidbywinname(cp, NULL, flag, &pid);
2867                         if (stat < 0)
2868                                 return (ENOENT);
2869                         stat = idmap_get_sidbyuid(gh, pid, flag, &numericsid,
2870                             &rid, &map_stat);
2871                 } else {
2872                         stat = idmap_getgidbywinname(cp, NULL, flag, &pid);
2873                         if (stat < 0)
2874                                 return (ENOENT);
2875                         stat = idmap_get_sidbygid(gh, pid, flag, &numericsid,
2876                             &rid, &map_stat);
2877                 }
2878                 if (stat < 0) {
2879                         idmap_get_destroy(gh);
2880                         return (ENOENT);
2881                 }
2882                 stat = idmap_get_mappings(gh);
2883                 idmap_get_destroy(gh);
2884 
2885                 if (stat < 0) {
2886                         return (ENOENT);
2887                 }
2888                 if (numericsid == NULL)
2889                         return (ENOENT);
2890                 cp = numericsid;
2891                 *ridp = rid;
2892                 /* will be further decoded below */
2893         }
2894 
2895         if (strncmp(cp, "S-1-", 4) == 0) {
2896                 /* It's a numeric SID (eg "S-1-234-567-89") */
2897                 (void) strlcpy(domain, cp, domainlen);
2898                 errno = 0;
2899                 if (*ridp == 0) {
2900                         cp = strrchr(domain, '-');
2901                         *cp = '\0';
2902                         cp++;
2903                         *ridp = strtoull(cp, &end, 10);
2904                 } else {
2905                         end = "";
2906                 }
2907                 if (numericsid) {
2908                         free(numericsid);
2909                         numericsid = NULL;
2910                 }
2911                 if (errno != 0 || *end != '\0')
2912                         return (EINVAL);
2913         } else if (!isdigit(*cp)) {
2914                 /*
2915                  * It's a user/group name (eg "user") that needs to be
2916                  * turned into a uid/gid
2917                  */
2918                 if (zoned && getzoneid() == GLOBAL_ZONEID)
2919                         return (ENOENT);
2920                 if (isuser) {
2921                         struct passwd *pw;
2922                         pw = getpwnam(cp);
2923                         if (pw == NULL)
2924                                 return (ENOENT);
2925                         *ridp = pw->pw_uid;
2926                 } else {
2927                         struct group *gr;
2928                         gr = getgrnam(cp);
2929                         if (gr == NULL)
2930                                 return (ENOENT);
2931                         *ridp = gr->gr_gid;
2932                 }
2933         } else {
2934                 /* It's a user/group ID (eg "12345"). */
2935                 uid_t id = strtoul(cp, &end, 10);
2936                 idmap_rid_t rid;
2937                 char *mapdomain;
2938 
2939                 if (*end != '\0')
2940                         return (EINVAL);
2941                 if (id > MAXUID) {
2942                         /* It's an ephemeral ID. */
2943                         if (idmap_id_to_numeric_domain_rid(id, isuser,
2944                             &mapdomain, &rid) != 0)
2945                                 return (ENOENT);
2946                         (void) strlcpy(domain, mapdomain, domainlen);
2947                         *ridp = rid;
2948                 } else {
2949                         *ridp = id;
2950                 }
2951         }
2952 
2953         ASSERT3P(numericsid, ==, NULL);
2954         return (0);
2955 }
2956 
2957 static int
2958 zfs_prop_get_userquota_common(zfs_handle_t *zhp, const char *propname,
2959     uint64_t *propvalue, zfs_userquota_prop_t *typep)
2960 {
2961         int err;
2962         zfs_cmd_t zc = { 0 };
2963 
2964         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
2965 
2966         err = userquota_propname_decode(propname,
2967             zfs_prop_get_int(zhp, ZFS_PROP_ZONED),
2968             typep, zc.zc_value, sizeof (zc.zc_value), &zc.zc_guid);
2969         zc.zc_objset_type = *typep;
2970         if (err)
2971                 return (err);
2972 
2973         err = ioctl(zhp->zfs_hdl->libzfs_fd, ZFS_IOC_USERSPACE_ONE, &zc);
2974         if (err)
2975                 return (err);
2976 
2977         *propvalue = zc.zc_cookie;
2978         return (0);
2979 }
2980 
2981 int
2982 zfs_prop_get_userquota_int(zfs_handle_t *zhp, const char *propname,
2983     uint64_t *propvalue)
2984 {
2985         zfs_userquota_prop_t type;
2986 
2987         return (zfs_prop_get_userquota_common(zhp, propname, propvalue,
2988             &type));
2989 }
2990 
2991 int
2992 zfs_prop_get_userquota(zfs_handle_t *zhp, const char *propname,
2993     char *propbuf, int proplen, boolean_t literal)
2994 {
2995         int err;
2996         uint64_t propvalue;
2997         zfs_userquota_prop_t type;
2998 
2999         err = zfs_prop_get_userquota_common(zhp, propname, &propvalue,
3000             &type);
3001 
3002         if (err)
3003                 return (err);
3004 
3005         if (literal) {
3006                 (void) snprintf(propbuf, proplen, "%llu", propvalue);
3007         } else if (propvalue == 0 &&
3008             (type == ZFS_PROP_USERQUOTA || type == ZFS_PROP_GROUPQUOTA)) {
3009                 (void) strlcpy(propbuf, "none", proplen);
3010         } else {
3011                 zfs_nicenum(propvalue, propbuf, proplen);
3012         }
3013         return (0);
3014 }
3015 
3016 int
3017 zfs_prop_get_written_int(zfs_handle_t *zhp, const char *propname,
3018     uint64_t *propvalue)
3019 {
3020         int err;
3021         zfs_cmd_t zc = { 0 };
3022         const char *snapname;
3023 
3024         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
3025 
3026         snapname = strchr(propname, '@') + 1;
3027         if (strchr(snapname, '@')) {
3028                 (void) strlcpy(zc.zc_value, snapname, sizeof (zc.zc_value));
3029         } else {
3030                 /* snapname is the short name, append it to zhp's fsname */
3031                 char *cp;
3032 
3033                 (void) strlcpy(zc.zc_value, zhp->zfs_name,
3034                     sizeof (zc.zc_value));
3035                 cp = strchr(zc.zc_value, '@');
3036                 if (cp != NULL)
3037                         *cp = '\0';
3038                 (void) strlcat(zc.zc_value, "@", sizeof (zc.zc_value));
3039                 (void) strlcat(zc.zc_value, snapname, sizeof (zc.zc_value));
3040         }
3041 
3042         err = ioctl(zhp->zfs_hdl->libzfs_fd, ZFS_IOC_SPACE_WRITTEN, &zc);
3043         if (err)
3044                 return (err);
3045 
3046         *propvalue = zc.zc_cookie;
3047         return (0);
3048 }
3049 
3050 int
3051 zfs_prop_get_written(zfs_handle_t *zhp, const char *propname,
3052     char *propbuf, int proplen, boolean_t literal)
3053 {
3054         int err;
3055         uint64_t propvalue;
3056 
3057         err = zfs_prop_get_written_int(zhp, propname, &propvalue);
3058 
3059         if (err)
3060                 return (err);
3061 
3062         if (literal) {
3063                 (void) snprintf(propbuf, proplen, "%llu", propvalue);
3064         } else {
3065                 zfs_nicenum(propvalue, propbuf, proplen);
3066         }
3067         return (0);
3068 }
3069 
3070 /*
3071  * Returns the name of the given zfs handle.
3072  */
3073 const char *
3074 zfs_get_name(const zfs_handle_t *zhp)
3075 {
3076         return (zhp->zfs_name);
3077 }
3078 
3079 /*
3080  * Returns the name of the parent pool for the given zfs handle.
3081  */
3082 const char *
3083 zfs_get_pool_name(const zfs_handle_t *zhp)
3084 {
3085         return (zhp->zpool_hdl->zpool_name);
3086 }
3087 
3088 /*
3089  * Returns the type of the given zfs handle.
3090  */
3091 zfs_type_t
3092 zfs_get_type(const zfs_handle_t *zhp)
3093 {
3094         return (zhp->zfs_type);
3095 }
3096 
3097 /*
3098  * Is one dataset name a child dataset of another?
3099  *
3100  * Needs to handle these cases:
3101  * Dataset 1    "a/foo"         "a/foo"         "a/foo"         "a/foo"
3102  * Dataset 2    "a/fo"          "a/foobar"      "a/bar/baz"     "a/foo/bar"
3103  * Descendant?  No.             No.             No.             Yes.
3104  */
3105 static boolean_t
3106 is_descendant(const char *ds1, const char *ds2)
3107 {
3108         size_t d1len = strlen(ds1);
3109 
3110         /* ds2 can't be a descendant if it's smaller */
3111         if (strlen(ds2) < d1len)
3112                 return (B_FALSE);
3113 
3114         /* otherwise, compare strings and verify that there's a '/' char */
3115         return (ds2[d1len] == '/' && (strncmp(ds1, ds2, d1len) == 0));
3116 }
3117 
3118 /*
3119  * Given a complete name, return just the portion that refers to the parent.
3120  * Will return -1 if there is no parent (path is just the name of the
3121  * pool).
3122  */
3123 static int
3124 parent_name(const char *path, char *buf, size_t buflen)
3125 {
3126         char *slashp;
3127 
3128         (void) strlcpy(buf, path, buflen);
3129 
3130         if ((slashp = strrchr(buf, '/')) == NULL)
3131                 return (-1);
3132         *slashp = '\0';
3133 
3134         return (0);
3135 }
3136 
3137 /*
3138  * If accept_ancestor is false, then check to make sure that the given path has
3139  * a parent, and that it exists.  If accept_ancestor is true, then find the
3140  * closest existing ancestor for the given path.  In prefixlen return the
3141  * length of already existing prefix of the given path.  We also fetch the
3142  * 'zoned' property, which is used to validate property settings when creating
3143  * new datasets.
3144  */
3145 static int
3146 check_parents(libzfs_handle_t *hdl, const char *path, uint64_t *zoned,
3147     boolean_t accept_ancestor, int *prefixlen)
3148 {
3149         zfs_cmd_t zc = { 0 };
3150         char parent[ZFS_MAX_DATASET_NAME_LEN];
3151         char *slash;
3152         zfs_handle_t *zhp;
3153         char errbuf[1024];
3154         uint64_t is_zoned;
3155 
3156         (void) snprintf(errbuf, sizeof (errbuf),
3157             dgettext(TEXT_DOMAIN, "cannot create '%s'"), path);
3158 
3159         /* get parent, and check to see if this is just a pool */
3160         if (parent_name(path, parent, sizeof (parent)) != 0) {
3161                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3162                     "missing dataset name"));
3163                 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3164         }
3165 
3166         /* check to see if the pool exists */
3167         if ((slash = strchr(parent, '/')) == NULL)
3168                 slash = parent + strlen(parent);
3169         (void) strncpy(zc.zc_name, parent, slash - parent);
3170         zc.zc_name[slash - parent] = '\0';
3171         if (ioctl(hdl->libzfs_fd, ZFS_IOC_OBJSET_STATS, &zc) != 0 &&
3172             errno == ENOENT) {
3173                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3174                     "no such pool '%s'"), zc.zc_name);
3175                 return (zfs_error(hdl, EZFS_NOENT, errbuf));
3176         }
3177 
3178         /* check to see if the parent dataset exists */
3179         while ((zhp = make_dataset_handle(hdl, parent)) == NULL) {
3180                 if (errno == ENOENT && accept_ancestor) {
3181                         /*
3182                          * Go deeper to find an ancestor, give up on top level.
3183                          */
3184                         if (parent_name(parent, parent, sizeof (parent)) != 0) {
3185                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3186                                     "no such pool '%s'"), zc.zc_name);
3187                                 return (zfs_error(hdl, EZFS_NOENT, errbuf));
3188                         }
3189                 } else if (errno == ENOENT) {
3190                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3191                             "parent does not exist"));
3192                         return (zfs_error(hdl, EZFS_NOENT, errbuf));
3193                 } else
3194                         return (zfs_standard_error(hdl, errno, errbuf));
3195         }
3196 
3197         is_zoned = zfs_prop_get_int(zhp, ZFS_PROP_ZONED);
3198         if (zoned != NULL)
3199                 *zoned = is_zoned;
3200 
3201         /* we are in a non-global zone, but parent is in the global zone */
3202         if (getzoneid() != GLOBAL_ZONEID && !is_zoned) {
3203                 (void) zfs_standard_error(hdl, EPERM, errbuf);
3204                 zfs_close(zhp);
3205                 return (-1);
3206         }
3207 
3208         /* make sure parent is a filesystem */
3209         if (zfs_get_type(zhp) != ZFS_TYPE_FILESYSTEM) {
3210                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3211                     "parent is not a filesystem"));
3212                 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf);
3213                 zfs_close(zhp);
3214                 return (-1);
3215         }
3216 
3217         zfs_close(zhp);
3218         if (prefixlen != NULL)
3219                 *prefixlen = strlen(parent);
3220         return (0);
3221 }
3222 
3223 /*
3224  * Finds whether the dataset of the given type(s) exists.
3225  */
3226 boolean_t
3227 zfs_dataset_exists(libzfs_handle_t *hdl, const char *path, zfs_type_t types)
3228 {
3229         zfs_handle_t *zhp;
3230 
3231         if (!zfs_validate_name(hdl, path, types, B_FALSE))
3232                 return (B_FALSE);
3233 
3234         /*
3235          * Try to get stats for the dataset, which will tell us if it exists.
3236          */
3237         if ((zhp = make_dataset_handle(hdl, path)) != NULL) {
3238                 int ds_type = zhp->zfs_type;
3239 
3240                 zfs_close(zhp);
3241                 if (types & ds_type)
3242                         return (B_TRUE);
3243         }
3244         return (B_FALSE);
3245 }
3246 
3247 /*
3248  * Given a path to 'target', create all the ancestors between
3249  * the prefixlen portion of the path, and the target itself.
3250  * Fail if the initial prefixlen-ancestor does not already exist.
3251  */
3252 int
3253 create_parents(libzfs_handle_t *hdl, char *target, int prefixlen)
3254 {
3255         zfs_handle_t *h;
3256         char *cp;
3257         const char *opname;
3258 
3259         /* make sure prefix exists */
3260         cp = target + prefixlen;
3261         if (*cp != '/') {
3262                 assert(strchr(cp, '/') == NULL);
3263                 h = zfs_open(hdl, target, ZFS_TYPE_FILESYSTEM);
3264         } else {
3265                 *cp = '\0';
3266                 h = zfs_open(hdl, target, ZFS_TYPE_FILESYSTEM);
3267                 *cp = '/';
3268         }
3269         if (h == NULL)
3270                 return (-1);
3271         zfs_close(h);
3272 
3273         /*
3274          * Attempt to create, mount, and share any ancestor filesystems,
3275          * up to the prefixlen-long one.
3276          */
3277         for (cp = target + prefixlen + 1;
3278             (cp = strchr(cp, '/')) != NULL; *cp = '/', cp++) {
3279 
3280                 *cp = '\0';
3281 
3282                 h = make_dataset_handle(hdl, target);
3283                 if (h) {
3284                         /* it already exists, nothing to do here */
3285                         zfs_close(h);
3286                         continue;
3287                 }
3288 
3289                 if (zfs_create(hdl, target, ZFS_TYPE_FILESYSTEM,
3290                     NULL) != 0) {
3291                         opname = dgettext(TEXT_DOMAIN, "create");
3292                         goto ancestorerr;
3293                 }
3294 
3295                 h = zfs_open(hdl, target, ZFS_TYPE_FILESYSTEM);
3296                 if (h == NULL) {
3297                         opname = dgettext(TEXT_DOMAIN, "open");
3298                         goto ancestorerr;
3299                 }
3300 
3301                 if (zfs_mount(h, NULL, 0) != 0) {
3302                         opname = dgettext(TEXT_DOMAIN, "mount");
3303                         goto ancestorerr;
3304                 }
3305 
3306                 if (zfs_share(h) != 0) {
3307                         opname = dgettext(TEXT_DOMAIN, "share");
3308                         goto ancestorerr;
3309                 }
3310 
3311                 zfs_close(h);
3312         }
3313 
3314         return (0);
3315 
3316 ancestorerr:
3317         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3318             "failed to %s ancestor '%s'"), opname, target);
3319         return (-1);
3320 }
3321 
3322 /*
3323  * Creates non-existing ancestors of the given path.
3324  */
3325 int
3326 zfs_create_ancestors(libzfs_handle_t *hdl, const char *path)
3327 {
3328         int prefix;
3329         char *path_copy;
3330         int rc = 0;
3331 
3332         if (check_parents(hdl, path, NULL, B_TRUE, &prefix) != 0)
3333                 return (-1);
3334 
3335         if ((path_copy = strdup(path)) != NULL) {
3336                 rc = create_parents(hdl, path_copy, prefix);
3337                 free(path_copy);
3338         }
3339         if (path_copy == NULL || rc != 0)
3340                 return (-1);
3341 
3342         return (0);
3343 }
3344 
3345 /*
3346  * Create a new filesystem or volume.
3347  */
3348 int
3349 zfs_create(libzfs_handle_t *hdl, const char *path, zfs_type_t type,
3350     nvlist_t *props)
3351 {
3352         int ret;
3353         uint64_t size = 0;
3354         uint64_t blocksize = zfs_prop_default_numeric(ZFS_PROP_VOLBLOCKSIZE);
3355         char errbuf[1024];
3356         uint64_t zoned;
3357         enum lzc_dataset_type ost;
3358         zpool_handle_t *zpool_handle;
3359 
3360         (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3361             "cannot create '%s'"), path);
3362 
3363         /* validate the path, taking care to note the extended error message */
3364         if (!zfs_validate_name(hdl, path, type, B_TRUE))
3365                 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3366 
3367         /* validate parents exist */
3368         if (check_parents(hdl, path, &zoned, B_FALSE, NULL) != 0)
3369                 return (-1);
3370 
3371         /*
3372          * The failure modes when creating a dataset of a different type over
3373          * one that already exists is a little strange.  In particular, if you
3374          * try to create a dataset on top of an existing dataset, the ioctl()
3375          * will return ENOENT, not EEXIST.  To prevent this from happening, we
3376          * first try to see if the dataset exists.
3377          */
3378         if (zfs_dataset_exists(hdl, path, ZFS_TYPE_DATASET)) {
3379                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3380                     "dataset already exists"));
3381                 return (zfs_error(hdl, EZFS_EXISTS, errbuf));
3382         }
3383 
3384         if (type == ZFS_TYPE_VOLUME)
3385                 ost = LZC_DATSET_TYPE_ZVOL;
3386         else
3387                 ost = LZC_DATSET_TYPE_ZFS;
3388 
3389         /* open zpool handle for prop validation */
3390         char pool_path[ZFS_MAX_DATASET_NAME_LEN];
3391         (void) strlcpy(pool_path, path, sizeof (pool_path));
3392 
3393         /* truncate pool_path at first slash */
3394         char *p = strchr(pool_path, '/');
3395         if (p != NULL)
3396                 *p = '\0';
3397 
3398         if ((zpool_handle = zpool_open(hdl, pool_path)) == NULL)
3399                 return (-1);
3400 
3401         if (props && (props = zfs_valid_proplist(hdl, type, props,
3402             zoned, NULL, zpool_handle, errbuf)) == 0) {
3403                 zpool_close(zpool_handle);
3404                 return (-1);
3405         }
3406         zpool_close(zpool_handle);
3407 
3408         if (type == ZFS_TYPE_VOLUME) {
3409                 /*
3410                  * If we are creating a volume, the size and block size must
3411                  * satisfy a few restraints.  First, the blocksize must be a
3412                  * valid block size between SPA_{MIN,MAX}BLOCKSIZE.  Second, the
3413                  * volsize must be a multiple of the block size, and cannot be
3414                  * zero.
3415                  */
3416                 if (props == NULL || nvlist_lookup_uint64(props,
3417                     zfs_prop_to_name(ZFS_PROP_VOLSIZE), &size) != 0) {
3418                         nvlist_free(props);
3419                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3420                             "missing volume size"));
3421                         return (zfs_error(hdl, EZFS_BADPROP, errbuf));
3422                 }
3423 
3424                 if ((ret = nvlist_lookup_uint64(props,
3425                     zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE),
3426                     &blocksize)) != 0) {
3427                         if (ret == ENOENT) {
3428                                 blocksize = zfs_prop_default_numeric(
3429                                     ZFS_PROP_VOLBLOCKSIZE);
3430                         } else {
3431                                 nvlist_free(props);
3432                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3433                                     "missing volume block size"));
3434                                 return (zfs_error(hdl, EZFS_BADPROP, errbuf));
3435                         }
3436                 }
3437 
3438                 if (size == 0) {
3439                         nvlist_free(props);
3440                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3441                             "volume size cannot be zero"));
3442                         return (zfs_error(hdl, EZFS_BADPROP, errbuf));
3443                 }
3444 
3445                 if (size % blocksize != 0) {
3446                         nvlist_free(props);
3447                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3448                             "volume size must be a multiple of volume block "
3449                             "size"));
3450                         return (zfs_error(hdl, EZFS_BADPROP, errbuf));
3451                 }
3452         }
3453 
3454         /* create the dataset */
3455         ret = lzc_create(path, ost, props);
3456         nvlist_free(props);
3457 
3458         /* check for failure */
3459         if (ret != 0) {
3460                 char parent[ZFS_MAX_DATASET_NAME_LEN];
3461                 (void) parent_name(path, parent, sizeof (parent));
3462 
3463                 switch (errno) {
3464                 case ENOENT:
3465                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3466                             "no such parent '%s'"), parent);
3467                         return (zfs_error(hdl, EZFS_NOENT, errbuf));
3468 
3469                 case EINVAL:
3470                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3471                             "parent '%s' is not a filesystem"), parent);
3472                         return (zfs_error(hdl, EZFS_BADTYPE, errbuf));
3473 
3474                 case ENOTSUP:
3475                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3476                             "pool must be upgraded to set this "
3477                             "property or value"));
3478                         return (zfs_error(hdl, EZFS_BADVERSION, errbuf));
3479 #ifdef _ILP32
3480                 case EOVERFLOW:
3481                         /*
3482                          * This platform can't address a volume this big.
3483                          */
3484                         if (type == ZFS_TYPE_VOLUME)
3485                                 return (zfs_error(hdl, EZFS_VOLTOOBIG,
3486                                     errbuf));
3487 #endif
3488                         /* FALLTHROUGH */
3489                 default:
3490                         return (zfs_standard_error(hdl, errno, errbuf));
3491                 }
3492         }
3493 
3494         return (0);
3495 }
3496 
3497 /*
3498  * Destroys the given dataset.  The caller must make sure that the filesystem
3499  * isn't mounted, and that there are no active dependents. If the file system
3500  * does not exist this function does nothing.
3501  */
3502 int
3503 zfs_destroy(zfs_handle_t *zhp, boolean_t defer)
3504 {
3505         zfs_cmd_t zc = { 0 };
3506 
3507         if (zhp->zfs_type == ZFS_TYPE_BOOKMARK) {
3508                 nvlist_t *nv = fnvlist_alloc();
3509                 fnvlist_add_boolean(nv, zhp->zfs_name);
3510                 int error = lzc_destroy_bookmarks(nv, NULL);
3511                 fnvlist_free(nv);
3512                 if (error != 0) {
3513                         return (zfs_standard_error_fmt(zhp->zfs_hdl, errno,
3514                             dgettext(TEXT_DOMAIN, "cannot destroy '%s'"),
3515                             zhp->zfs_name));
3516                 }
3517                 return (0);
3518         }
3519 
3520         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
3521 
3522         if (ZFS_IS_VOLUME(zhp)) {
3523                 zc.zc_objset_type = DMU_OST_ZVOL;
3524         } else {
3525                 zc.zc_objset_type = DMU_OST_ZFS;
3526         }
3527 
3528         zc.zc_defer_destroy = defer;
3529         if (zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_DESTROY, &zc) != 0 &&
3530             errno != ENOENT) {
3531                 return (zfs_standard_error_fmt(zhp->zfs_hdl, errno,
3532                     dgettext(TEXT_DOMAIN, "cannot destroy '%s'"),
3533                     zhp->zfs_name));
3534         }
3535 
3536         remove_mountpoint(zhp);
3537 
3538         return (0);
3539 }
3540 
3541 struct destroydata {
3542         nvlist_t *nvl;
3543         const char *snapname;
3544 };
3545 
3546 static int
3547 zfs_check_snap_cb(zfs_handle_t *zhp, void *arg)
3548 {
3549         struct destroydata *dd = arg;
3550         char name[ZFS_MAX_DATASET_NAME_LEN];
3551         int rv = 0;
3552 
3553         (void) snprintf(name, sizeof (name),
3554             "%s@%s", zhp->zfs_name, dd->snapname);
3555 
3556         if (lzc_exists(name))
3557                 verify(nvlist_add_boolean(dd->nvl, name) == 0);
3558 
3559         rv = zfs_iter_filesystems(zhp, zfs_check_snap_cb, dd);
3560         zfs_close(zhp);
3561         return (rv);
3562 }
3563 
3564 /*
3565  * Destroys all snapshots with the given name in zhp & descendants.
3566  */
3567 int
3568 zfs_destroy_snaps(zfs_handle_t *zhp, char *snapname, boolean_t defer)
3569 {
3570         int ret;
3571         struct destroydata dd = { 0 };
3572 
3573         dd.snapname = snapname;
3574         verify(nvlist_alloc(&dd.nvl, NV_UNIQUE_NAME, 0) == 0);
3575         (void) zfs_check_snap_cb(zfs_handle_dup(zhp), &dd);
3576 
3577         if (nvlist_empty(dd.nvl)) {
3578                 ret = zfs_standard_error_fmt(zhp->zfs_hdl, ENOENT,
3579                     dgettext(TEXT_DOMAIN, "cannot destroy '%s@%s'"),
3580                     zhp->zfs_name, snapname);
3581         } else {
3582                 ret = zfs_destroy_snaps_nvl(zhp->zfs_hdl, dd.nvl, defer);
3583         }
3584         nvlist_free(dd.nvl);
3585         return (ret);
3586 }
3587 
3588 /*
3589  * Destroys all the snapshots named in the nvlist.
3590  */
3591 int
3592 zfs_destroy_snaps_nvl(libzfs_handle_t *hdl, nvlist_t *snaps, boolean_t defer)
3593 {
3594         int ret;
3595         nvlist_t *errlist = NULL;
3596 
3597         ret = lzc_destroy_snaps(snaps, defer, &errlist);
3598 
3599         if (ret == 0) {
3600                 nvlist_free(errlist);
3601                 return (0);
3602         }
3603 
3604         if (nvlist_empty(errlist)) {
3605                 char errbuf[1024];
3606                 (void) snprintf(errbuf, sizeof (errbuf),
3607                     dgettext(TEXT_DOMAIN, "cannot destroy snapshots"));
3608 
3609                 ret = zfs_standard_error(hdl, ret, errbuf);
3610         }
3611         for (nvpair_t *pair = nvlist_next_nvpair(errlist, NULL);
3612             pair != NULL; pair = nvlist_next_nvpair(errlist, pair)) {
3613                 char errbuf[1024];
3614                 (void) snprintf(errbuf, sizeof (errbuf),
3615                     dgettext(TEXT_DOMAIN, "cannot destroy snapshot %s"),
3616                     nvpair_name(pair));
3617 
3618                 switch (fnvpair_value_int32(pair)) {
3619                 case EEXIST:
3620                         zfs_error_aux(hdl,
3621                             dgettext(TEXT_DOMAIN, "snapshot is cloned"));
3622                         ret = zfs_error(hdl, EZFS_EXISTS, errbuf);
3623                         break;
3624                 default:
3625                         ret = zfs_standard_error(hdl, errno, errbuf);
3626                         break;
3627                 }
3628         }
3629 
3630         nvlist_free(errlist);
3631         return (ret);
3632 }
3633 
3634 /*
3635  * Clones the given dataset.  The target must be of the same type as the source.
3636  */
3637 int
3638 zfs_clone(zfs_handle_t *zhp, const char *target, nvlist_t *props)
3639 {
3640         char parent[ZFS_MAX_DATASET_NAME_LEN];
3641         int ret;
3642         char errbuf[1024];
3643         libzfs_handle_t *hdl = zhp->zfs_hdl;
3644         uint64_t zoned;
3645 
3646         assert(zhp->zfs_type == ZFS_TYPE_SNAPSHOT);
3647 
3648         (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3649             "cannot create '%s'"), target);
3650 
3651         /* validate the target/clone name */
3652         if (!zfs_validate_name(hdl, target, ZFS_TYPE_FILESYSTEM, B_TRUE))
3653                 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3654 
3655         /* validate parents exist */
3656         if (check_parents(hdl, target, &zoned, B_FALSE, NULL) != 0)
3657                 return (-1);
3658 
3659         (void) parent_name(target, parent, sizeof (parent));
3660 
3661         /* do the clone */
3662 
3663         if (props) {
3664                 zfs_type_t type;
3665                 if (ZFS_IS_VOLUME(zhp)) {
3666                         type = ZFS_TYPE_VOLUME;
3667                 } else {
3668                         type = ZFS_TYPE_FILESYSTEM;
3669                 }
3670                 if ((props = zfs_valid_proplist(hdl, type, props, zoned,
3671                     zhp, zhp->zpool_hdl, errbuf)) == NULL)
3672                         return (-1);
3673         }
3674 
3675         ret = lzc_clone(target, zhp->zfs_name, props);
3676         nvlist_free(props);
3677 
3678         if (ret != 0) {
3679                 switch (errno) {
3680 
3681                 case ENOENT:
3682                         /*
3683                          * The parent doesn't exist.  We should have caught this
3684                          * above, but there may a race condition that has since
3685                          * destroyed the parent.
3686                          *
3687                          * At this point, we don't know whether it's the source
3688                          * that doesn't exist anymore, or whether the target
3689                          * dataset doesn't exist.
3690                          */
3691                         zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN,
3692                             "no such parent '%s'"), parent);
3693                         return (zfs_error(zhp->zfs_hdl, EZFS_NOENT, errbuf));
3694 
3695                 case EXDEV:
3696                         zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN,
3697                             "source and target pools differ"));
3698                         return (zfs_error(zhp->zfs_hdl, EZFS_CROSSTARGET,
3699                             errbuf));
3700 
3701                 default:
3702                         return (zfs_standard_error(zhp->zfs_hdl, errno,
3703                             errbuf));
3704                 }
3705         }
3706 
3707         return (ret);
3708 }
3709 
3710 /*
3711  * Promotes the given clone fs to be the clone parent.
3712  */
3713 int
3714 zfs_promote(zfs_handle_t *zhp)
3715 {
3716         libzfs_handle_t *hdl = zhp->zfs_hdl;
3717         char snapname[ZFS_MAX_DATASET_NAME_LEN];
3718         int ret;
3719         char errbuf[1024];
3720 
3721         (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3722             "cannot promote '%s'"), zhp->zfs_name);
3723 
3724         if (zhp->zfs_type == ZFS_TYPE_SNAPSHOT) {
3725                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3726                     "snapshots can not be promoted"));
3727                 return (zfs_error(hdl, EZFS_BADTYPE, errbuf));
3728         }
3729 
3730         if (zhp->zfs_dmustats.dds_origin[0] == '\0') {
3731                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3732                     "not a cloned filesystem"));
3733                 return (zfs_error(hdl, EZFS_BADTYPE, errbuf));
3734         }
3735 
3736         ret = lzc_promote(zhp->zfs_name, snapname, sizeof (snapname));
3737 
3738         if (ret != 0) {
3739                 switch (ret) {
3740                 case EEXIST:
3741                         /* There is a conflicting snapshot name. */
3742                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3743                             "conflicting snapshot '%s' from parent '%s'"),
3744                             snapname, zhp->zfs_dmustats.dds_origin);
3745                         return (zfs_error(hdl, EZFS_EXISTS, errbuf));
3746 
3747                 default:
3748                         return (zfs_standard_error(hdl, ret, errbuf));
3749                 }
3750         }
3751         return (ret);
3752 }
3753 
3754 typedef struct snapdata {
3755         nvlist_t *sd_nvl;
3756         const char *sd_snapname;
3757 } snapdata_t;
3758 
3759 static int
3760 zfs_snapshot_cb(zfs_handle_t *zhp, void *arg)
3761 {
3762         snapdata_t *sd = arg;
3763         char name[ZFS_MAX_DATASET_NAME_LEN];
3764         int rv = 0;
3765 
3766         if (zfs_prop_get_int(zhp, ZFS_PROP_INCONSISTENT) == 0) {
3767                 (void) snprintf(name, sizeof (name),
3768                     "%s@%s", zfs_get_name(zhp), sd->sd_snapname);
3769 
3770                 fnvlist_add_boolean(sd->sd_nvl, name);
3771 
3772                 rv = zfs_iter_filesystems(zhp, zfs_snapshot_cb, sd);
3773         }
3774         zfs_close(zhp);
3775 
3776         return (rv);
3777 }
3778 
3779 /*
3780  * Creates snapshots.  The keys in the snaps nvlist are the snapshots to be
3781  * created.
3782  */
3783 int
3784 zfs_snapshot_nvl(libzfs_handle_t *hdl, nvlist_t *snaps, nvlist_t *props)
3785 {
3786         int ret;
3787         char errbuf[1024];
3788         nvpair_t *elem;
3789         nvlist_t *errors;
3790 
3791         (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3792             "cannot create snapshots "));
3793 
3794         elem = NULL;
3795         while ((elem = nvlist_next_nvpair(snaps, elem)) != NULL) {
3796                 const char *snapname = nvpair_name(elem);
3797 
3798                 /* validate the target name */
3799                 if (!zfs_validate_name(hdl, snapname, ZFS_TYPE_SNAPSHOT,
3800                     B_TRUE)) {
3801                         (void) snprintf(errbuf, sizeof (errbuf),
3802                             dgettext(TEXT_DOMAIN,
3803                             "cannot create snapshot '%s'"), snapname);
3804                         return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3805                 }
3806         }
3807 
3808         /*
3809          * get pool handle for prop validation. assumes all snaps are in the
3810          * same pool, as does lzc_snapshot (below).
3811          */
3812         char pool[ZFS_MAX_DATASET_NAME_LEN];
3813         elem = nvlist_next_nvpair(snaps, NULL);
3814         (void) strlcpy(pool, nvpair_name(elem), sizeof (pool));
3815         pool[strcspn(pool, "/@")] = '\0';
3816         zpool_handle_t *zpool_hdl = zpool_open(hdl, pool);
3817 
3818         if (props != NULL &&
3819             (props = zfs_valid_proplist(hdl, ZFS_TYPE_SNAPSHOT,
3820             props, B_FALSE, NULL, zpool_hdl, errbuf)) == NULL) {
3821                 zpool_close(zpool_hdl);
3822                 return (-1);
3823         }
3824         zpool_close(zpool_hdl);
3825 
3826         ret = lzc_snapshot(snaps, props, &errors);
3827 
3828         if (ret != 0) {
3829                 boolean_t printed = B_FALSE;
3830                 for (elem = nvlist_next_nvpair(errors, NULL);
3831                     elem != NULL;
3832                     elem = nvlist_next_nvpair(errors, elem)) {
3833                         (void) snprintf(errbuf, sizeof (errbuf),
3834                             dgettext(TEXT_DOMAIN,
3835                             "cannot create snapshot '%s'"), nvpair_name(elem));
3836                         (void) zfs_standard_error(hdl,
3837                             fnvpair_value_int32(elem), errbuf);
3838                         printed = B_TRUE;
3839                 }
3840                 if (!printed) {
3841                         switch (ret) {
3842                         case EXDEV:
3843                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3844                                     "multiple snapshots of same "
3845                                     "fs not allowed"));
3846                                 (void) zfs_error(hdl, EZFS_EXISTS, errbuf);
3847 
3848                                 break;
3849                         default:
3850                                 (void) zfs_standard_error(hdl, ret, errbuf);
3851                         }
3852                 }
3853         }
3854 
3855         nvlist_free(props);
3856         nvlist_free(errors);
3857         return (ret);
3858 }
3859 
3860 int
3861 zfs_snapshot(libzfs_handle_t *hdl, const char *path, boolean_t recursive,
3862     nvlist_t *props)
3863 {
3864         int ret;
3865         snapdata_t sd = { 0 };
3866         char fsname[ZFS_MAX_DATASET_NAME_LEN];
3867         char *cp;
3868         zfs_handle_t *zhp;
3869         char errbuf[1024];
3870 
3871         (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3872             "cannot snapshot %s"), path);
3873 
3874         if (!zfs_validate_name(hdl, path, ZFS_TYPE_SNAPSHOT, B_TRUE))
3875                 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3876 
3877         (void) strlcpy(fsname, path, sizeof (fsname));
3878         cp = strchr(fsname, '@');
3879         *cp = '\0';
3880         sd.sd_snapname = cp + 1;
3881 
3882         if ((zhp = zfs_open(hdl, fsname, ZFS_TYPE_FILESYSTEM |
3883             ZFS_TYPE_VOLUME)) == NULL) {
3884                 return (-1);
3885         }
3886 
3887         verify(nvlist_alloc(&sd.sd_nvl, NV_UNIQUE_NAME, 0) == 0);
3888         if (recursive) {
3889                 (void) zfs_snapshot_cb(zfs_handle_dup(zhp), &sd);
3890         } else {
3891                 fnvlist_add_boolean(sd.sd_nvl, path);
3892         }
3893 
3894         ret = zfs_snapshot_nvl(hdl, sd.sd_nvl, props);
3895         nvlist_free(sd.sd_nvl);
3896         zfs_close(zhp);
3897         return (ret);
3898 }
3899 
3900 /*
3901  * Destroy any more recent snapshots.  We invoke this callback on any dependents
3902  * of the snapshot first.  If the 'cb_dependent' member is non-zero, then this
3903  * is a dependent and we should just destroy it without checking the transaction
3904  * group.
3905  */
3906 typedef struct rollback_data {
3907         const char      *cb_target;             /* the snapshot */
3908         uint64_t        cb_create;              /* creation time reference */
3909         boolean_t       cb_error;
3910         boolean_t       cb_force;
3911 } rollback_data_t;
3912 
3913 static int
3914 rollback_destroy_dependent(zfs_handle_t *zhp, void *data)
3915 {
3916         rollback_data_t *cbp = data;
3917         prop_changelist_t *clp;
3918 
3919         /* We must destroy this clone; first unmount it */
3920         clp = changelist_gather(zhp, ZFS_PROP_NAME, 0,
3921             cbp->cb_force ? MS_FORCE: 0);
3922         if (clp == NULL || changelist_prefix(clp) != 0) {
3923                 cbp->cb_error = B_TRUE;
3924                 zfs_close(zhp);
3925                 return (0);
3926         }
3927         if (zfs_destroy(zhp, B_FALSE) != 0)
3928                 cbp->cb_error = B_TRUE;
3929         else
3930                 changelist_remove(clp, zhp->zfs_name);
3931         (void) changelist_postfix(clp);
3932         changelist_free(clp);
3933 
3934         zfs_close(zhp);
3935         return (0);
3936 }
3937 
3938 static int
3939 rollback_destroy(zfs_handle_t *zhp, void *data)
3940 {
3941         rollback_data_t *cbp = data;
3942 
3943         if (zfs_prop_get_int(zhp, ZFS_PROP_CREATETXG) > cbp->cb_create) {
3944                 cbp->cb_error |= zfs_iter_dependents(zhp, B_FALSE,
3945                     rollback_destroy_dependent, cbp);
3946 
3947                 cbp->cb_error |= zfs_destroy(zhp, B_FALSE);
3948         }
3949 
3950         zfs_close(zhp);
3951         return (0);
3952 }
3953 
3954 /*
3955  * Given a dataset, rollback to a specific snapshot, discarding any
3956  * data changes since then and making it the active dataset.
3957  *
3958  * Any snapshots and bookmarks more recent than the target are
3959  * destroyed, along with their dependents (i.e. clones).
3960  */
3961 int
3962 zfs_rollback(zfs_handle_t *zhp, zfs_handle_t *snap, boolean_t force)
3963 {
3964         rollback_data_t cb = { 0 };
3965         int err;
3966         boolean_t restore_resv = 0;
3967         uint64_t old_volsize = 0, new_volsize;
3968         zfs_prop_t resv_prop;
3969 
3970         assert(zhp->zfs_type == ZFS_TYPE_FILESYSTEM ||
3971             zhp->zfs_type == ZFS_TYPE_VOLUME);
3972 
3973         /*
3974          * Destroy all recent snapshots and their dependents.
3975          */
3976         cb.cb_force = force;
3977         cb.cb_target = snap->zfs_name;
3978         cb.cb_create = zfs_prop_get_int(snap, ZFS_PROP_CREATETXG);
3979         (void) zfs_iter_snapshots(zhp, B_FALSE, rollback_destroy, &cb);
3980         (void) zfs_iter_bookmarks(zhp, rollback_destroy, &cb);
3981 
3982         if (cb.cb_error)
3983                 return (-1);
3984 
3985         /*
3986          * Now that we have verified that the snapshot is the latest,
3987          * rollback to the given snapshot.
3988          */
3989 
3990         if (zhp->zfs_type == ZFS_TYPE_VOLUME) {
3991                 if (zfs_which_resv_prop(zhp, &resv_prop) < 0)
3992                         return (-1);
3993                 old_volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE);
3994                 restore_resv =
3995                     (old_volsize == zfs_prop_get_int(zhp, resv_prop));
3996         }
3997 
3998         /*
3999          * Pass both the filesystem and the wanted snapshot names,
4000          * we would get an error back if the snapshot is destroyed or
4001          * a new snapshot is created before this request is processed.
4002          */
4003         err = lzc_rollback_to(zhp->zfs_name, snap->zfs_name);
4004         if (err == EXDEV) {
4005                 zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN,
4006                     "'%s' is not the latest snapshot"), snap->zfs_name);
4007                 (void) zfs_error_fmt(zhp->zfs_hdl, EZFS_BUSY,
4008                     dgettext(TEXT_DOMAIN, "cannot rollback '%s'"),
4009                     zhp->zfs_name);
4010                 return (err);
4011         } else if (err != 0) {
4012                 (void) zfs_standard_error_fmt(zhp->zfs_hdl, errno,
4013                     dgettext(TEXT_DOMAIN, "cannot rollback '%s'"),
4014                     zhp->zfs_name);
4015                 return (err);
4016         }
4017 
4018         /*
4019          * For volumes, if the pre-rollback volsize matched the pre-
4020          * rollback reservation and the volsize has changed then set
4021          * the reservation property to the post-rollback volsize.
4022          * Make a new handle since the rollback closed the dataset.
4023          */
4024         if ((zhp->zfs_type == ZFS_TYPE_VOLUME) &&
4025             (zhp = make_dataset_handle(zhp->zfs_hdl, zhp->zfs_name))) {
4026                 if (restore_resv) {
4027                         new_volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE);
4028                         if (old_volsize != new_volsize)
4029                                 err = zfs_prop_set_int(zhp, resv_prop,
4030                                     new_volsize);
4031                 }
4032                 zfs_close(zhp);
4033         }
4034         return (err);
4035 }
4036 
4037 /*
4038  * Renames the given dataset.
4039  */
4040 int
4041 zfs_rename(zfs_handle_t *zhp, const char *target, boolean_t recursive,
4042     boolean_t force_unmount)
4043 {
4044         int ret = 0;
4045         zfs_cmd_t zc = { 0 };
4046         char *delim;
4047         prop_changelist_t *cl = NULL;
4048         zfs_handle_t *zhrp = NULL;
4049         char *parentname = NULL;
4050         char parent[ZFS_MAX_DATASET_NAME_LEN];
4051         libzfs_handle_t *hdl = zhp->zfs_hdl;
4052         char errbuf[1024];
4053 
4054         /* if we have the same exact name, just return success */
4055         if (strcmp(zhp->zfs_name, target) == 0)
4056                 return (0);
4057 
4058         (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
4059             "cannot rename to '%s'"), target);
4060 
4061         /*
4062          * Make sure the target name is valid
4063          */
4064         if (zhp->zfs_type == ZFS_TYPE_SNAPSHOT) {
4065                 if ((strchr(target, '@') == NULL) ||
4066                     *target == '@') {
4067                         /*
4068                          * Snapshot target name is abbreviated,
4069                          * reconstruct full dataset name
4070                          */
4071                         (void) strlcpy(parent, zhp->zfs_name,
4072                             sizeof (parent));
4073                         delim = strchr(parent, '@');
4074                         if (strchr(target, '@') == NULL)
4075                                 *(++delim) = '\0';
4076                         else
4077                                 *delim = '\0';
4078                         (void) strlcat(parent, target, sizeof (parent));
4079                         target = parent;
4080                 } else {
4081                         /*
4082                          * Make sure we're renaming within the same dataset.
4083                          */
4084                         delim = strchr(target, '@');
4085                         if (strncmp(zhp->zfs_name, target, delim - target)
4086                             != 0 || zhp->zfs_name[delim - target] != '@') {
4087                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4088                                     "snapshots must be part of same "
4089                                     "dataset"));
4090                                 return (zfs_error(hdl, EZFS_CROSSTARGET,
4091                                     errbuf));
4092                         }
4093                 }
4094                 if (!zfs_validate_name(hdl, target, zhp->zfs_type, B_TRUE))
4095                         return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
4096         } else {
4097                 if (recursive) {
4098                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4099                             "recursive rename must be a snapshot"));
4100                         return (zfs_error(hdl, EZFS_BADTYPE, errbuf));
4101                 }
4102 
4103                 if (!zfs_validate_name(hdl, target, zhp->zfs_type, B_TRUE))
4104                         return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
4105 
4106                 /* validate parents */
4107                 if (check_parents(hdl, target, NULL, B_FALSE, NULL) != 0)
4108                         return (-1);
4109 
4110                 /* make sure we're in the same pool */
4111                 verify((delim = strchr(target, '/')) != NULL);
4112                 if (strncmp(zhp->zfs_name, target, delim - target) != 0 ||
4113                     zhp->zfs_name[delim - target] != '/') {
4114                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4115                             "datasets must be within same pool"));
4116                         return (zfs_error(hdl, EZFS_CROSSTARGET, errbuf));
4117                 }
4118 
4119                 /* new name cannot be a child of the current dataset name */
4120                 if (is_descendant(zhp->zfs_name, target)) {
4121                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4122                             "New dataset name cannot be a descendant of "
4123                             "current dataset name"));
4124                         return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
4125                 }
4126         }
4127 
4128         (void) snprintf(errbuf, sizeof (errbuf),
4129             dgettext(TEXT_DOMAIN, "cannot rename '%s'"), zhp->zfs_name);
4130 
4131         if (getzoneid() == GLOBAL_ZONEID &&
4132             zfs_prop_get_int(zhp, ZFS_PROP_ZONED)) {
4133                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4134                     "dataset is used in a non-global zone"));
4135                 return (zfs_error(hdl, EZFS_ZONED, errbuf));
4136         }
4137 
4138         if (recursive) {
4139                 parentname = zfs_strdup(zhp->zfs_hdl, zhp->zfs_name);
4140                 if (parentname == NULL) {
4141                         ret = -1;
4142                         goto error;
4143                 }
4144                 delim = strchr(parentname, '@');
4145                 *delim = '\0';
4146                 zhrp = zfs_open(zhp->zfs_hdl, parentname, ZFS_TYPE_DATASET);
4147                 if (zhrp == NULL) {
4148                         ret = -1;
4149                         goto error;
4150                 }
4151         } else if (zhp->zfs_type != ZFS_TYPE_SNAPSHOT) {
4152                 if ((cl = changelist_gather(zhp, ZFS_PROP_NAME, 0,
4153                     force_unmount ? MS_FORCE : 0)) == NULL)
4154                         return (-1);
4155 
4156                 if (changelist_haszonedchild(cl)) {
4157                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4158                             "child dataset with inherited mountpoint is used "
4159                             "in a non-global zone"));
4160                         (void) zfs_error(hdl, EZFS_ZONED, errbuf);
4161                         ret = -1;
4162                         goto error;
4163                 }
4164 
4165                 if ((ret = changelist_prefix(cl)) != 0)
4166                         goto error;
4167         }
4168 
4169         if (ZFS_IS_VOLUME(zhp))
4170                 zc.zc_objset_type = DMU_OST_ZVOL;
4171         else
4172                 zc.zc_objset_type = DMU_OST_ZFS;
4173 
4174         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
4175         (void) strlcpy(zc.zc_value, target, sizeof (zc.zc_value));
4176 
4177         zc.zc_cookie = recursive;
4178 
4179         if ((ret = zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_RENAME, &zc)) != 0) {
4180                 /*
4181                  * if it was recursive, the one that actually failed will
4182                  * be in zc.zc_name
4183                  */
4184                 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
4185                     "cannot rename '%s'"), zc.zc_name);
4186 
4187                 if (recursive && errno == EEXIST) {
4188                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4189                             "a child dataset already has a snapshot "
4190                             "with the new name"));
4191                         (void) zfs_error(hdl, EZFS_EXISTS, errbuf);
4192                 } else {
4193                         (void) zfs_standard_error(zhp->zfs_hdl, errno, errbuf);
4194                 }
4195 
4196                 /*
4197                  * On failure, we still want to remount any filesystems that
4198                  * were previously mounted, so we don't alter the system state.
4199                  */
4200                 if (cl != NULL)
4201                         (void) changelist_postfix(cl);
4202         } else {
4203                 if (cl != NULL) {
4204                         changelist_rename(cl, zfs_get_name(zhp), target);
4205                         ret = changelist_postfix(cl);
4206                 }
4207         }
4208 
4209 error:
4210         if (parentname != NULL) {
4211                 free(parentname);
4212         }
4213         if (zhrp != NULL) {
4214                 zfs_close(zhrp);
4215         }
4216         if (cl != NULL) {
4217                 changelist_free(cl);
4218         }
4219         return (ret);
4220 }
4221 
4222 nvlist_t *
4223 zfs_get_user_props(zfs_handle_t *zhp)
4224 {
4225         return (zhp->zfs_user_props);
4226 }
4227 
4228 nvlist_t *
4229 zfs_get_recvd_props(zfs_handle_t *zhp)
4230 {
4231         if (zhp->zfs_recvd_props == NULL)
4232                 if (get_recvd_props_ioctl(zhp) != 0)
4233                         return (NULL);
4234         return (zhp->zfs_recvd_props);
4235 }
4236 
4237 /*
4238  * This function is used by 'zfs list' to determine the exact set of columns to
4239  * display, and their maximum widths.  This does two main things:
4240  *
4241  *      - If this is a list of all properties, then expand the list to include
4242  *        all native properties, and set a flag so that for each dataset we look
4243  *        for new unique user properties and add them to the list.
4244  *
4245  *      - For non fixed-width properties, keep track of the maximum width seen
4246  *        so that we can size the column appropriately. If the user has
4247  *        requested received property values, we also need to compute the width
4248  *        of the RECEIVED column.
4249  */
4250 int
4251 zfs_expand_proplist(zfs_handle_t *zhp, zprop_list_t **plp, boolean_t received,
4252     boolean_t literal)
4253 {
4254         libzfs_handle_t *hdl = zhp->zfs_hdl;
4255         zprop_list_t *entry;
4256         zprop_list_t **last, **start;
4257         nvlist_t *userprops, *propval;
4258         nvpair_t *elem;
4259         char *strval;
4260         char buf[ZFS_MAXPROPLEN];
4261 
4262         if (zprop_expand_list(hdl, plp, ZFS_TYPE_DATASET) != 0)
4263                 return (-1);
4264 
4265         userprops = zfs_get_user_props(zhp);
4266 
4267         entry = *plp;
4268         if (entry->pl_all && nvlist_next_nvpair(userprops, NULL) != NULL) {
4269                 /*
4270                  * Go through and add any user properties as necessary.  We
4271                  * start by incrementing our list pointer to the first
4272                  * non-native property.
4273                  */
4274                 start = plp;
4275                 while (*start != NULL) {
4276                         if ((*start)->pl_prop == ZPROP_INVAL)
4277                                 break;
4278                         start = &(*start)->pl_next;
4279                 }
4280 
4281                 elem = NULL;
4282                 while ((elem = nvlist_next_nvpair(userprops, elem)) != NULL) {
4283                         /*
4284                          * See if we've already found this property in our list.
4285                          */
4286                         for (last = start; *last != NULL;
4287                             last = &(*last)->pl_next) {
4288                                 if (strcmp((*last)->pl_user_prop,
4289                                     nvpair_name(elem)) == 0)
4290                                         break;
4291                         }
4292 
4293                         if (*last == NULL) {
4294                                 if ((entry = zfs_alloc(hdl,
4295                                     sizeof (zprop_list_t))) == NULL ||
4296                                     ((entry->pl_user_prop = zfs_strdup(hdl,
4297                                     nvpair_name(elem)))) == NULL) {
4298                                         free(entry);
4299                                         return (-1);
4300                                 }
4301 
4302                                 entry->pl_prop = ZPROP_INVAL;
4303                                 entry->pl_width = strlen(nvpair_name(elem));
4304                                 entry->pl_all = B_TRUE;
4305                                 *last = entry;
4306                         }
4307                 }
4308         }
4309 
4310         /*
4311          * Now go through and check the width of any non-fixed columns
4312          */
4313         for (entry = *plp; entry != NULL; entry = entry->pl_next) {
4314                 if (entry->pl_fixed && !literal)
4315                         continue;
4316 
4317                 if (entry->pl_prop != ZPROP_INVAL) {
4318                         if (zfs_prop_get(zhp, entry->pl_prop,
4319                             buf, sizeof (buf), NULL, NULL, 0, literal) == 0) {
4320                                 if (strlen(buf) > entry->pl_width)
4321                                         entry->pl_width = strlen(buf);
4322                         }
4323                         if (received && zfs_prop_get_recvd(zhp,
4324                             zfs_prop_to_name(entry->pl_prop),
4325                             buf, sizeof (buf), literal) == 0)
4326                                 if (strlen(buf) > entry->pl_recvd_width)
4327                                         entry->pl_recvd_width = strlen(buf);
4328                 } else {
4329                         if (nvlist_lookup_nvlist(userprops, entry->pl_user_prop,
4330                             &propval) == 0) {
4331                                 verify(nvlist_lookup_string(propval,
4332                                     ZPROP_VALUE, &strval) == 0);
4333                                 if (strlen(strval) > entry->pl_width)
4334                                         entry->pl_width = strlen(strval);
4335                         }
4336                         if (received && zfs_prop_get_recvd(zhp,
4337                             entry->pl_user_prop,
4338                             buf, sizeof (buf), literal) == 0)
4339                                 if (strlen(buf) > entry->pl_recvd_width)
4340                                         entry->pl_recvd_width = strlen(buf);
4341                 }
4342         }
4343 
4344         return (0);
4345 }
4346 
4347 int
4348 zfs_deleg_share_nfs(libzfs_handle_t *hdl, char *dataset, char *path,
4349     char *resource, void *export, void *sharetab,
4350     int sharemax, zfs_share_op_t operation)
4351 {
4352         zfs_cmd_t zc = { 0 };
4353         int error;
4354 
4355         (void) strlcpy(zc.zc_name, dataset, sizeof (zc.zc_name));
4356         (void) strlcpy(zc.zc_value, path, sizeof (zc.zc_value));
4357         if (resource)
4358                 (void) strlcpy(zc.zc_string, resource, sizeof (zc.zc_string));
4359         zc.zc_share.z_sharedata = (uint64_t)(uintptr_t)sharetab;
4360         zc.zc_share.z_exportdata = (uint64_t)(uintptr_t)export;
4361         zc.zc_share.z_sharetype = operation;
4362         zc.zc_share.z_sharemax = sharemax;
4363         error = ioctl(hdl->libzfs_fd, ZFS_IOC_SHARE, &zc);
4364         return (error);
4365 }
4366 
4367 void
4368 zfs_prune_proplist(zfs_handle_t *zhp, uint8_t *props)
4369 {
4370         nvpair_t *curr;
4371 
4372         /*
4373          * Keep a reference to the props-table against which we prune the
4374          * properties.
4375          */
4376         zhp->zfs_props_table = props;
4377 
4378         curr = nvlist_next_nvpair(zhp->zfs_props, NULL);
4379 
4380         while (curr) {
4381                 zfs_prop_t zfs_prop = zfs_name_to_prop(nvpair_name(curr));
4382                 nvpair_t *next = nvlist_next_nvpair(zhp->zfs_props, curr);
4383 
4384                 /*
4385                  * User properties will result in ZPROP_INVAL, and since we
4386                  * only know how to prune standard ZFS properties, we always
4387                  * leave these in the list.  This can also happen if we
4388                  * encounter an unknown DSL property (when running older
4389                  * software, for example).
4390                  */
4391                 if (zfs_prop != ZPROP_INVAL && props[zfs_prop] == B_FALSE)
4392                         (void) nvlist_remove(zhp->zfs_props,
4393                             nvpair_name(curr), nvpair_type(curr));
4394                 curr = next;
4395         }
4396 }
4397 
4398 static int
4399 zfs_smb_acl_mgmt(libzfs_handle_t *hdl, char *dataset, char *path,
4400     zfs_smb_acl_op_t cmd, char *resource1, char *resource2)
4401 {
4402         zfs_cmd_t zc = { 0 };
4403         nvlist_t *nvlist = NULL;
4404         int error;
4405 
4406         (void) strlcpy(zc.zc_name, dataset, sizeof (zc.zc_name));
4407         (void) strlcpy(zc.zc_value, path, sizeof (zc.zc_value));
4408         zc.zc_cookie = (uint64_t)cmd;
4409 
4410         if (cmd == ZFS_SMB_ACL_RENAME) {
4411                 if (nvlist_alloc(&nvlist, NV_UNIQUE_NAME, 0) != 0) {
4412                         (void) no_memory(hdl);
4413                         return (0);
4414                 }
4415         }
4416 
4417         switch (cmd) {
4418         case ZFS_SMB_ACL_ADD:
4419         case ZFS_SMB_ACL_REMOVE:
4420                 (void) strlcpy(zc.zc_string, resource1, sizeof (zc.zc_string));
4421                 break;
4422         case ZFS_SMB_ACL_RENAME:
4423                 if (nvlist_add_string(nvlist, ZFS_SMB_ACL_SRC,
4424                     resource1) != 0) {
4425                                 (void) no_memory(hdl);
4426                                 return (-1);
4427                 }
4428                 if (nvlist_add_string(nvlist, ZFS_SMB_ACL_TARGET,
4429                     resource2) != 0) {
4430                                 (void) no_memory(hdl);
4431                                 return (-1);
4432                 }
4433                 if (zcmd_write_src_nvlist(hdl, &zc, nvlist) != 0) {
4434                         nvlist_free(nvlist);
4435                         return (-1);
4436                 }
4437                 break;
4438         case ZFS_SMB_ACL_PURGE:
4439                 break;
4440         default:
4441                 return (-1);
4442         }
4443         error = ioctl(hdl->libzfs_fd, ZFS_IOC_SMB_ACL, &zc);
4444         nvlist_free(nvlist);
4445         return (error);
4446 }
4447 
4448 int
4449 zfs_smb_acl_add(libzfs_handle_t *hdl, char *dataset,
4450     char *path, char *resource)
4451 {
4452         return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_ADD,
4453             resource, NULL));
4454 }
4455 
4456 int
4457 zfs_smb_acl_remove(libzfs_handle_t *hdl, char *dataset,
4458     char *path, char *resource)
4459 {
4460         return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_REMOVE,
4461             resource, NULL));
4462 }
4463 
4464 int
4465 zfs_smb_acl_purge(libzfs_handle_t *hdl, char *dataset, char *path)
4466 {
4467         return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_PURGE,
4468             NULL, NULL));
4469 }
4470 
4471 int
4472 zfs_smb_acl_rename(libzfs_handle_t *hdl, char *dataset, char *path,
4473     char *oldname, char *newname)
4474 {
4475         return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_RENAME,
4476             oldname, newname));
4477 }
4478 
4479 int
4480 zfs_userspace(zfs_handle_t *zhp, zfs_userquota_prop_t type,
4481     zfs_userspace_cb_t func, void *arg)
4482 {
4483         zfs_cmd_t zc = { 0 };
4484         zfs_useracct_t buf[100];
4485         libzfs_handle_t *hdl = zhp->zfs_hdl;
4486         int ret;
4487 
4488         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
4489 
4490         zc.zc_objset_type = type;
4491         zc.zc_nvlist_dst = (uintptr_t)buf;
4492 
4493         for (;;) {
4494                 zfs_useracct_t *zua = buf;
4495 
4496                 zc.zc_nvlist_dst_size = sizeof (buf);
4497                 if (zfs_ioctl(hdl, ZFS_IOC_USERSPACE_MANY, &zc) != 0) {
4498                         char errbuf[1024];
4499 
4500                         (void) snprintf(errbuf, sizeof (errbuf),
4501                             dgettext(TEXT_DOMAIN,
4502                             "cannot get used/quota for %s"), zc.zc_name);
4503                         return (zfs_standard_error_fmt(hdl, errno, errbuf));
4504                 }
4505                 if (zc.zc_nvlist_dst_size == 0)
4506                         break;
4507 
4508                 while (zc.zc_nvlist_dst_size > 0) {
4509                         if ((ret = func(arg, zua->zu_domain, zua->zu_rid,
4510                             zua->zu_space)) != 0)
4511                                 return (ret);
4512                         zua++;
4513                         zc.zc_nvlist_dst_size -= sizeof (zfs_useracct_t);
4514                 }
4515         }
4516 
4517         return (0);
4518 }
4519 
4520 struct holdarg {
4521         nvlist_t *nvl;
4522         const char *snapname;
4523         const char *tag;
4524         boolean_t recursive;
4525         int error;
4526 };
4527 
4528 static int
4529 zfs_hold_one(zfs_handle_t *zhp, void *arg)
4530 {
4531         struct holdarg *ha = arg;
4532         char name[ZFS_MAX_DATASET_NAME_LEN];
4533         int rv = 0;
4534 
4535         (void) snprintf(name, sizeof (name),
4536             "%s@%s", zhp->zfs_name, ha->snapname);
4537 
4538         if (lzc_exists(name))
4539                 fnvlist_add_string(ha->nvl, name, ha->tag);
4540 
4541         if (ha->recursive)
4542                 rv = zfs_iter_filesystems(zhp, zfs_hold_one, ha);
4543         zfs_close(zhp);
4544         return (rv);
4545 }
4546 
4547 int
4548 zfs_hold(zfs_handle_t *zhp, const char *snapname, const char *tag,
4549     boolean_t recursive, int cleanup_fd)
4550 {
4551         int ret;
4552         struct holdarg ha;
4553 
4554         ha.nvl = fnvlist_alloc();
4555         ha.snapname = snapname;
4556         ha.tag = tag;
4557         ha.recursive = recursive;
4558         (void) zfs_hold_one(zfs_handle_dup(zhp), &ha);
4559 
4560         if (nvlist_empty(ha.nvl)) {
4561                 char errbuf[1024];
4562 
4563                 fnvlist_free(ha.nvl);
4564                 ret = ENOENT;
4565                 (void) snprintf(errbuf, sizeof (errbuf),
4566                     dgettext(TEXT_DOMAIN,
4567                     "cannot hold snapshot '%s@%s'"),
4568                     zhp->zfs_name, snapname);
4569                 (void) zfs_standard_error(zhp->zfs_hdl, ret, errbuf);
4570                 return (ret);
4571         }
4572 
4573         ret = zfs_hold_nvl(zhp, cleanup_fd, ha.nvl);
4574         fnvlist_free(ha.nvl);
4575 
4576         return (ret);
4577 }
4578 
4579 int
4580 zfs_hold_nvl(zfs_handle_t *zhp, int cleanup_fd, nvlist_t *holds)
4581 {
4582         int ret;
4583         nvlist_t *errors;
4584         libzfs_handle_t *hdl = zhp->zfs_hdl;
4585         char errbuf[1024];
4586         nvpair_t *elem;
4587 
4588         errors = NULL;
4589         ret = lzc_hold(holds, cleanup_fd, &errors);
4590 
4591         if (ret == 0) {
4592                 /* There may be errors even in the success case. */
4593                 fnvlist_free(errors);
4594                 return (0);
4595         }
4596 
4597         if (nvlist_empty(errors)) {
4598                 /* no hold-specific errors */
4599                 (void) snprintf(errbuf, sizeof (errbuf),
4600                     dgettext(TEXT_DOMAIN, "cannot hold"));
4601                 switch (ret) {
4602                 case ENOTSUP:
4603                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4604                             "pool must be upgraded"));
4605                         (void) zfs_error(hdl, EZFS_BADVERSION, errbuf);
4606                         break;
4607                 case EINVAL:
4608                         (void) zfs_error(hdl, EZFS_BADTYPE, errbuf);
4609                         break;
4610                 default:
4611                         (void) zfs_standard_error(hdl, ret, errbuf);
4612                 }
4613         }
4614 
4615         for (elem = nvlist_next_nvpair(errors, NULL);
4616             elem != NULL;
4617             elem = nvlist_next_nvpair(errors, elem)) {
4618                 (void) snprintf(errbuf, sizeof (errbuf),
4619                     dgettext(TEXT_DOMAIN,
4620                     "cannot hold snapshot '%s'"), nvpair_name(elem));
4621                 switch (fnvpair_value_int32(elem)) {
4622                 case E2BIG:
4623                         /*
4624                          * Temporary tags wind up having the ds object id
4625                          * prepended. So even if we passed the length check
4626                          * above, it's still possible for the tag to wind
4627                          * up being slightly too long.
4628                          */
4629                         (void) zfs_error(hdl, EZFS_TAGTOOLONG, errbuf);
4630                         break;
4631                 case EINVAL:
4632                         (void) zfs_error(hdl, EZFS_BADTYPE, errbuf);
4633                         break;
4634                 case EEXIST:
4635                         (void) zfs_error(hdl, EZFS_REFTAG_HOLD, errbuf);
4636                         break;
4637                 default:
4638                         (void) zfs_standard_error(hdl,
4639                             fnvpair_value_int32(elem), errbuf);
4640                 }
4641         }
4642 
4643         fnvlist_free(errors);
4644         return (ret);
4645 }
4646 
4647 static int
4648 zfs_release_one(zfs_handle_t *zhp, void *arg)
4649 {
4650         struct holdarg *ha = arg;
4651         char name[ZFS_MAX_DATASET_NAME_LEN];
4652         int rv = 0;
4653         nvlist_t *existing_holds;
4654 
4655         (void) snprintf(name, sizeof (name),
4656             "%s@%s", zhp->zfs_name, ha->snapname);
4657 
4658         if (lzc_get_holds(name, &existing_holds) != 0) {
4659                 ha->error = ENOENT;
4660         } else if (!nvlist_exists(existing_holds, ha->tag)) {
4661                 ha->error = ESRCH;
4662         } else {
4663                 nvlist_t *torelease = fnvlist_alloc();
4664                 fnvlist_add_boolean(torelease, ha->tag);
4665                 fnvlist_add_nvlist(ha->nvl, name, torelease);
4666                 fnvlist_free(torelease);
4667         }
4668 
4669         if (ha->recursive)
4670                 rv = zfs_iter_filesystems(zhp, zfs_release_one, ha);
4671         zfs_close(zhp);
4672         return (rv);
4673 }
4674 
4675 int
4676 zfs_release(zfs_handle_t *zhp, const char *snapname, const char *tag,
4677     boolean_t recursive)
4678 {
4679         int ret;
4680         struct holdarg ha;
4681         nvlist_t *errors = NULL;
4682         nvpair_t *elem;
4683         libzfs_handle_t *hdl = zhp->zfs_hdl;
4684         char errbuf[1024];
4685 
4686         ha.nvl = fnvlist_alloc();
4687         ha.snapname = snapname;
4688         ha.tag = tag;
4689         ha.recursive = recursive;
4690         ha.error = 0;
4691         (void) zfs_release_one(zfs_handle_dup(zhp), &ha);
4692 
4693         if (nvlist_empty(ha.nvl)) {
4694                 fnvlist_free(ha.nvl);
4695                 ret = ha.error;
4696                 (void) snprintf(errbuf, sizeof (errbuf),
4697                     dgettext(TEXT_DOMAIN,
4698                     "cannot release hold from snapshot '%s@%s'"),
4699                     zhp->zfs_name, snapname);
4700                 if (ret == ESRCH) {
4701                         (void) zfs_error(hdl, EZFS_REFTAG_RELE, errbuf);
4702                 } else {
4703                         (void) zfs_standard_error(hdl, ret, errbuf);
4704                 }
4705                 return (ret);
4706         }
4707 
4708         ret = lzc_release(ha.nvl, &errors);
4709         fnvlist_free(ha.nvl);
4710 
4711         if (ret == 0) {
4712                 /* There may be errors even in the success case. */
4713                 fnvlist_free(errors);
4714                 return (0);
4715         }
4716 
4717         if (nvlist_empty(errors)) {
4718                 /* no hold-specific errors */
4719                 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
4720                     "cannot release"));
4721                 switch (errno) {
4722                 case ENOTSUP:
4723                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4724                             "pool must be upgraded"));
4725                         (void) zfs_error(hdl, EZFS_BADVERSION, errbuf);
4726                         break;
4727                 default:
4728                         (void) zfs_standard_error_fmt(hdl, errno, errbuf);
4729                 }
4730         }
4731 
4732         for (elem = nvlist_next_nvpair(errors, NULL);
4733             elem != NULL;
4734             elem = nvlist_next_nvpair(errors, elem)) {
4735                 (void) snprintf(errbuf, sizeof (errbuf),
4736                     dgettext(TEXT_DOMAIN,
4737                     "cannot release hold from snapshot '%s'"),
4738                     nvpair_name(elem));
4739                 switch (fnvpair_value_int32(elem)) {
4740                 case ESRCH:
4741                         (void) zfs_error(hdl, EZFS_REFTAG_RELE, errbuf);
4742                         break;
4743                 case EINVAL:
4744                         (void) zfs_error(hdl, EZFS_BADTYPE, errbuf);
4745                         break;
4746                 default:
4747                         (void) zfs_standard_error_fmt(hdl,
4748                             fnvpair_value_int32(elem), errbuf);
4749                 }
4750         }
4751 
4752         fnvlist_free(errors);
4753         return (ret);
4754 }
4755 
4756 int
4757 zfs_get_fsacl(zfs_handle_t *zhp, nvlist_t **nvl)
4758 {
4759         zfs_cmd_t zc = { 0 };
4760         libzfs_handle_t *hdl = zhp->zfs_hdl;
4761         int nvsz = 2048;
4762         void *nvbuf;
4763         int err = 0;
4764         char errbuf[1024];
4765 
4766         assert(zhp->zfs_type == ZFS_TYPE_VOLUME ||
4767             zhp->zfs_type == ZFS_TYPE_FILESYSTEM);
4768 
4769 tryagain:
4770 
4771         nvbuf = malloc(nvsz);
4772         if (nvbuf == NULL) {
4773                 err = (zfs_error(hdl, EZFS_NOMEM, strerror(errno)));
4774                 goto out;
4775         }
4776 
4777         zc.zc_nvlist_dst_size = nvsz;
4778         zc.zc_nvlist_dst = (uintptr_t)nvbuf;
4779 
4780         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
4781 
4782         if (ioctl(hdl->libzfs_fd, ZFS_IOC_GET_FSACL, &zc) != 0) {
4783                 (void) snprintf(errbuf, sizeof (errbuf),
4784                     dgettext(TEXT_DOMAIN, "cannot get permissions on '%s'"),
4785                     zc.zc_name);
4786                 switch (errno) {
4787                 case ENOMEM:
4788                         free(nvbuf);
4789                         nvsz = zc.zc_nvlist_dst_size;
4790                         goto tryagain;
4791 
4792                 case ENOTSUP:
4793                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4794                             "pool must be upgraded"));
4795                         err = zfs_error(hdl, EZFS_BADVERSION, errbuf);
4796                         break;
4797                 case EINVAL:
4798                         err = zfs_error(hdl, EZFS_BADTYPE, errbuf);
4799                         break;
4800                 case ENOENT:
4801                         err = zfs_error(hdl, EZFS_NOENT, errbuf);
4802                         break;
4803                 default:
4804                         err = zfs_standard_error_fmt(hdl, errno, errbuf);
4805                         break;
4806                 }
4807         } else {
4808                 /* success */
4809                 int rc = nvlist_unpack(nvbuf, zc.zc_nvlist_dst_size, nvl, 0);
4810                 if (rc) {
4811                         (void) snprintf(errbuf, sizeof (errbuf), dgettext(
4812                             TEXT_DOMAIN, "cannot get permissions on '%s'"),
4813                             zc.zc_name);
4814                         err = zfs_standard_error_fmt(hdl, rc, errbuf);
4815                 }
4816         }
4817 
4818         free(nvbuf);
4819 out:
4820         return (err);
4821 }
4822 
4823 int
4824 zfs_set_fsacl(zfs_handle_t *zhp, boolean_t un, nvlist_t *nvl)
4825 {
4826         zfs_cmd_t zc = { 0 };
4827         libzfs_handle_t *hdl = zhp->zfs_hdl;
4828         char *nvbuf;
4829         char errbuf[1024];
4830         size_t nvsz;
4831         int err;
4832 
4833         assert(zhp->zfs_type == ZFS_TYPE_VOLUME ||
4834             zhp->zfs_type == ZFS_TYPE_FILESYSTEM);
4835 
4836         err = nvlist_size(nvl, &nvsz, NV_ENCODE_NATIVE);
4837         assert(err == 0);
4838 
4839         nvbuf = malloc(nvsz);
4840 
4841         err = nvlist_pack(nvl, &nvbuf, &nvsz, NV_ENCODE_NATIVE, 0);
4842         assert(err == 0);
4843 
4844         zc.zc_nvlist_src_size = nvsz;
4845         zc.zc_nvlist_src = (uintptr_t)nvbuf;
4846         zc.zc_perm_action = un;
4847 
4848         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
4849 
4850         if (zfs_ioctl(hdl, ZFS_IOC_SET_FSACL, &zc) != 0) {
4851                 (void) snprintf(errbuf, sizeof (errbuf),
4852                     dgettext(TEXT_DOMAIN, "cannot set permissions on '%s'"),
4853                     zc.zc_name);
4854                 switch (errno) {
4855                 case ENOTSUP:
4856                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4857                             "pool must be upgraded"));
4858                         err = zfs_error(hdl, EZFS_BADVERSION, errbuf);
4859                         break;
4860                 case EINVAL:
4861                         err = zfs_error(hdl, EZFS_BADTYPE, errbuf);
4862                         break;
4863                 case ENOENT:
4864                         err = zfs_error(hdl, EZFS_NOENT, errbuf);
4865                         break;
4866                 default:
4867                         err = zfs_standard_error_fmt(hdl, errno, errbuf);
4868                         break;
4869                 }
4870         }
4871 
4872         free(nvbuf);
4873 
4874         return (err);
4875 }
4876 
4877 int
4878 zfs_get_holds(zfs_handle_t *zhp, nvlist_t **nvl)
4879 {
4880         int err;
4881         char errbuf[1024];
4882 
4883         err = lzc_get_holds(zhp->zfs_name, nvl);
4884 
4885         if (err != 0) {
4886                 libzfs_handle_t *hdl = zhp->zfs_hdl;
4887 
4888                 (void) snprintf(errbuf, sizeof (errbuf),
4889                     dgettext(TEXT_DOMAIN, "cannot get holds for '%s'"),
4890                     zhp->zfs_name);
4891                 switch (err) {
4892                 case ENOTSUP:
4893                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4894                             "pool must be upgraded"));
4895                         err = zfs_error(hdl, EZFS_BADVERSION, errbuf);
4896                         break;
4897                 case EINVAL:
4898                         err = zfs_error(hdl, EZFS_BADTYPE, errbuf);
4899                         break;
4900                 case ENOENT:
4901                         err = zfs_error(hdl, EZFS_NOENT, errbuf);
4902                         break;
4903                 default:
4904                         err = zfs_standard_error_fmt(hdl, errno, errbuf);
4905                         break;
4906                 }
4907         }
4908 
4909         return (err);
4910 }
4911 
4912 /*
4913  * Convert the zvol's volume size to an appropriate reservation.
4914  * Note: If this routine is updated, it is necessary to update the ZFS test
4915  * suite's shell version in reservation.kshlib.
4916  */
4917 uint64_t
4918 zvol_volsize_to_reservation(uint64_t volsize, nvlist_t *props)
4919 {
4920         uint64_t numdb;
4921         uint64_t nblocks, volblocksize;
4922         int ncopies;
4923         char *strval;
4924 
4925         if (nvlist_lookup_string(props,
4926             zfs_prop_to_name(ZFS_PROP_COPIES), &strval) == 0)
4927                 ncopies = atoi(strval);
4928         else
4929                 ncopies = 1;
4930         if (nvlist_lookup_uint64(props,
4931             zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE),
4932             &volblocksize) != 0)
4933                 volblocksize = ZVOL_DEFAULT_BLOCKSIZE;
4934         nblocks = volsize/volblocksize;
4935         /* start with metadnode L0-L6 */
4936         numdb = 7;
4937         /* calculate number of indirects */
4938         while (nblocks > 1) {
4939                 nblocks += DNODES_PER_LEVEL - 1;
4940                 nblocks /= DNODES_PER_LEVEL;
4941                 numdb += nblocks;
4942         }
4943         numdb *= MIN(SPA_DVAS_PER_BP, ncopies + 1);
4944         volsize *= ncopies;
4945         /*
4946          * this is exactly DN_MAX_INDBLKSHIFT when metadata isn't
4947          * compressed, but in practice they compress down to about
4948          * 1100 bytes
4949          */
4950         numdb *= 1ULL << DN_MAX_INDBLKSHIFT;
4951         volsize += numdb;
4952         return (volsize);
4953 }
--- EOF ---