lib/libzfs/libzfs_dataset.c

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21
  22 /*
  23  * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
  24  * Copyright 2019 Joyent, Inc.
  25  * Copyright (c) 2011, 2020 by Delphix. All rights reserved.
  26  * Copyright (c) 2012 DEY Storage Systems, Inc.  All rights reserved.
  27  * Copyright (c) 2012 Pawel Jakub Dawidek <pawel@dawidek.net>.
  28  * Copyright (c) 2013 Martin Matuska. All rights reserved.
  29  * Copyright (c) 2013 Steven Hartland. All rights reserved.
  30  * Copyright 2017 Nexenta Systems, Inc.
  31  * Copyright 2016 Igor Kozhukhov <ikozhukhov@gmail.com>
  32  * Copyright 2017-2018 RackTop Systems.
  33  * Copyright (c) 2019 Datto Inc.
  34  * Copyright (c) 2019, loli10K <ezomori.nozomu@gmail.com>
  35  * Copyright (c) 2021 Matt Fiddaman
  36  */
  37
  38 #include <ctype.h>
  39 #include <errno.h>
  40 #include <libintl.h>
  41 #include <stdio.h>
  42 #include <stdlib.h>
  43 #include <strings.h>
  44 #include <unistd.h>
  45 #include <stddef.h>
  46 #include <zone.h>
  47 #include <fcntl.h>
  48 #include <sys/mntent.h>
  49 #include <sys/mount.h>
  50 #include <pwd.h>
  51 #include <grp.h>
  52 #include <ucred.h>
  53 #ifdef HAVE_IDMAP
  54 #include <idmap.h>
  55 #include <aclutils.h>
  56 #include <directory.h>
  57 #endif /* HAVE_IDMAP */
  58
  59 #include <sys/dnode.h>
  60 #include <sys/spa.h>
  61 #include <sys/zap.h>
  62 #include <sys/dsl_crypt.h>
  63 #include <libzfs.h>
  64 #include <libzutil.h>
  65
  66 #include "zfs_namecheck.h"
  67 #include "zfs_prop.h"
  68 #include "libzfs_impl.h"
  69 #include "zfs_deleg.h"
  70
  71 static int userquota_propname_decode(const char *propname, boolean_t zoned,
  72     zfs_userquota_prop_t *typep, char *domain, int domainlen, uint64_t *ridp);
  73
  74 /*
  75  * Given a single type (not a mask of types), return the type in a human
  76  * readable form.
  77  */
  78 const char *
  79 zfs_type_to_name(zfs_type_t type)
  80 {
  81         switch (type) {
  82         case ZFS_TYPE_FILESYSTEM:
  83                 return (dgettext(TEXT_DOMAIN, "filesystem"));
  84         case ZFS_TYPE_SNAPSHOT:
  85                 return (dgettext(TEXT_DOMAIN, "snapshot"));
  86         case ZFS_TYPE_VOLUME:
  87                 return (dgettext(TEXT_DOMAIN, "volume"));
  88         case ZFS_TYPE_POOL:
  89                 return (dgettext(TEXT_DOMAIN, "pool"));
  90         case ZFS_TYPE_BOOKMARK:
  91                 return (dgettext(TEXT_DOMAIN, "bookmark"));
  92         default:
  93                 assert(!"unhandled zfs_type_t");
  94         }
  95
  96         return (NULL);
  97 }
  98
  99 /*
 100  * Validate a ZFS path.  This is used even before trying to open the dataset, to
 101  * provide a more meaningful error message.  We call zfs_error_aux() to
 102  * explain exactly why the name was not valid.
 103  */
 104 int
 105 zfs_validate_name(libzfs_handle_t *hdl, const char *path, int type,
 106     boolean_t modifying)
 107 {
 108         namecheck_err_t why;
 109         char what;
 110
 111         if (!(type & ZFS_TYPE_SNAPSHOT) && strchr(path, '@') != NULL) {
 112                 if (hdl != NULL)
 113                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 114                             "snapshot delimiter '@' is not expected here"));
 115                 return (0);
 116         }
 117
 118         if (type == ZFS_TYPE_SNAPSHOT && strchr(path, '@') == NULL) {
 119                 if (hdl != NULL)
 120                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 121                             "missing '@' delimiter in snapshot name"));
 122                 return (0);
 123         }
 124
 125         if (!(type & ZFS_TYPE_BOOKMARK) && strchr(path, '#') != NULL) {
 126                 if (hdl != NULL)
 127                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 128                             "bookmark delimiter '#' is not expected here"));
 129                 return (0);
 130         }
 131
 132         if (type == ZFS_TYPE_BOOKMARK && strchr(path, '#') == NULL) {
 133                 if (hdl != NULL)
 134                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 135                             "missing '#' delimiter in bookmark name"));
 136                 return (0);
 137         }
 138
 139         if (modifying && strchr(path, '%') != NULL) {
 140                 if (hdl != NULL)
 141                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 142                             "invalid character %c in name"), '%');
 143                 return (0);
 144         }
 145
 146         if (entity_namecheck(path, &why, &what) != 0) {
 147                 if (hdl != NULL) {
 148                         switch (why) {
 149                         case NAME_ERR_TOOLONG:
 150                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 151                                     "name is too long"));
 152                                 break;
 153
 154                         case NAME_ERR_LEADING_SLASH:
 155                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 156                                     "leading slash in name"));
 157                                 break;
 158
 159                         case NAME_ERR_EMPTY_COMPONENT:
 160                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 161                                     "empty component or misplaced '@'"
 162                                     " or '#' delimiter in name"));
 163                                 break;
 164
 165                         case NAME_ERR_TRAILING_SLASH:
 166                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 167                                     "trailing slash in name"));
 168                                 break;
 169
 170                         case NAME_ERR_INVALCHAR:
 171                                 zfs_error_aux(hdl,
 172                                     dgettext(TEXT_DOMAIN, "invalid character "
 173                                     "'%c' in name"), what);
 174                                 break;
 175
 176                         case NAME_ERR_MULTIPLE_DELIMITERS:
 177                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 178                                     "multiple '@' and/or '#' delimiters in "
 179                                     "name"));
 180                                 break;
 181
 182                         case NAME_ERR_NOLETTER:
 183                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 184                                     "pool doesn't begin with a letter"));
 185                                 break;
 186
 187                         case NAME_ERR_RESERVED:
 188                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 189                                     "name is reserved"));
 190                                 break;
 191
 192                         case NAME_ERR_DISKLIKE:
 193                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 194                                     "reserved disk name"));
 195                                 break;
 196
 197                         case NAME_ERR_SELF_REF:
 198                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 199                                     "self reference, '.' is found in name"));
 200                                 break;
 201
 202                         case NAME_ERR_PARENT_REF:
 203                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 204                                     "parent reference, '..' is found in name"));
 205                                 break;
 206
 207                         default:
 208                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 209                                     "(%d) not defined"), why);
 210                                 break;
 211                         }
 212                 }
 213
 214                 return (0);
 215         }
 216
 217         return (-1);
 218 }
 219
 220 int
 221 zfs_name_valid(const char *name, zfs_type_t type)
 222 {
 223         if (type == ZFS_TYPE_POOL)
 224                 return (zpool_name_valid(NULL, B_FALSE, name));
 225         return (zfs_validate_name(NULL, name, type, B_FALSE));
 226 }
 227
 228 /*
 229  * This function takes the raw DSL properties, and filters out the user-defined
 230  * properties into a separate nvlist.
 231  */
 232 static nvlist_t *
 233 process_user_props(zfs_handle_t *zhp, nvlist_t *props)
 234 {
 235         libzfs_handle_t *hdl = zhp->zfs_hdl;
 236         nvpair_t *elem;
 237         nvlist_t *propval;
 238         nvlist_t *nvl;
 239
 240         if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0) != 0) {
 241                 (void) no_memory(hdl);
 242                 return (NULL);
 243         }
 244
 245         elem = NULL;
 246         while ((elem = nvlist_next_nvpair(props, elem)) != NULL) {
 247                 if (!zfs_prop_user(nvpair_name(elem)))
 248                         continue;
 249
 250                 verify(nvpair_value_nvlist(elem, &propval) == 0);
 251                 if (nvlist_add_nvlist(nvl, nvpair_name(elem), propval) != 0) {
 252                         nvlist_free(nvl);
 253                         (void) no_memory(hdl);
 254                         return (NULL);
 255                 }
 256         }
 257
 258         return (nvl);
 259 }
 260
 261 static zpool_handle_t *
 262 zpool_add_handle(zfs_handle_t *zhp, const char *pool_name)
 263 {
 264         libzfs_handle_t *hdl = zhp->zfs_hdl;
 265         zpool_handle_t *zph;
 266
 267         if ((zph = zpool_open_canfail(hdl, pool_name)) != NULL) {
 268                 if (hdl->libzfs_pool_handles != NULL)
 269                         zph->zpool_next = hdl->libzfs_pool_handles;
 270                 hdl->libzfs_pool_handles = zph;
 271         }
 272         return (zph);
 273 }
 274
 275 static zpool_handle_t *
 276 zpool_find_handle(zfs_handle_t *zhp, const char *pool_name, int len)
 277 {
 278         libzfs_handle_t *hdl = zhp->zfs_hdl;
 279         zpool_handle_t *zph = hdl->libzfs_pool_handles;
 280
 281         while ((zph != NULL) &&
 282             (strncmp(pool_name, zpool_get_name(zph), len) != 0))
 283                 zph = zph->zpool_next;
 284         return (zph);
 285 }
 286
 287 /*
 288  * Returns a handle to the pool that contains the provided dataset.
 289  * If a handle to that pool already exists then that handle is returned.
 290  * Otherwise, a new handle is created and added to the list of handles.
 291  */
 292 static zpool_handle_t *
 293 zpool_handle(zfs_handle_t *zhp)
 294 {
 295         char *pool_name;
 296         int len;
 297         zpool_handle_t *zph;
 298
 299         len = strcspn(zhp->zfs_name, "/@#") + 1;
 300         pool_name = zfs_alloc(zhp->zfs_hdl, len);
 301         (void) strlcpy(pool_name, zhp->zfs_name, len);
 302
 303         zph = zpool_find_handle(zhp, pool_name, len);
 304         if (zph == NULL)
 305                 zph = zpool_add_handle(zhp, pool_name);
 306
 307         free(pool_name);
 308         return (zph);
 309 }
 310
 311 void
 312 zpool_free_handles(libzfs_handle_t *hdl)
 313 {
 314         zpool_handle_t *next, *zph = hdl->libzfs_pool_handles;
 315
 316         while (zph != NULL) {
 317                 next = zph->zpool_next;
 318                 zpool_close(zph);
 319                 zph = next;
 320         }
 321         hdl->libzfs_pool_handles = NULL;
 322 }
 323
 324 /*
 325  * Utility function to gather stats (objset and zpl) for the given object.
 326  */
 327 static int
 328 get_stats_ioctl(zfs_handle_t *zhp, zfs_cmd_t *zc)
 329 {
 330         libzfs_handle_t *hdl = zhp->zfs_hdl;
 331
 332         (void) strlcpy(zc->zc_name, zhp->zfs_name, sizeof (zc->zc_name));
 333
 334         while (zfs_ioctl(hdl, ZFS_IOC_OBJSET_STATS, zc) != 0) {
 335                 if (errno == ENOMEM) {
 336                         if (zcmd_expand_dst_nvlist(hdl, zc) != 0) {
 337                                 return (-1);
 338                         }
 339                 } else {
 340                         return (-1);
 341                 }
 342         }
 343         return (0);
 344 }
 345
 346 /*
 347  * Utility function to get the received properties of the given object.
 348  */
 349 static int
 350 get_recvd_props_ioctl(zfs_handle_t *zhp)
 351 {
 352         libzfs_handle_t *hdl = zhp->zfs_hdl;
 353         nvlist_t *recvdprops;
 354         zfs_cmd_t zc = {"\0"};
 355         int err;
 356
 357         if (zcmd_alloc_dst_nvlist(hdl, &zc, 0) != 0)
 358                 return (-1);
 359
 360         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
 361
 362         while (zfs_ioctl(hdl, ZFS_IOC_OBJSET_RECVD_PROPS, &zc) != 0) {
 363                 if (errno == ENOMEM) {
 364                         if (zcmd_expand_dst_nvlist(hdl, &zc) != 0) {
 365                                 return (-1);
 366                         }
 367                 } else {
 368                         zcmd_free_nvlists(&zc);
 369                         return (-1);
 370                 }
 371         }
 372
 373         err = zcmd_read_dst_nvlist(zhp->zfs_hdl, &zc, &recvdprops);
 374         zcmd_free_nvlists(&zc);
 375         if (err != 0)
 376                 return (-1);
 377
 378         nvlist_free(zhp->zfs_recvd_props);
 379         zhp->zfs_recvd_props = recvdprops;
 380
 381         return (0);
 382 }
 383
 384 static int
 385 put_stats_zhdl(zfs_handle_t *zhp, zfs_cmd_t *zc)
 386 {
 387         nvlist_t *allprops, *userprops;
 388
 389         zhp->zfs_dmustats = zc->zc_objset_stats; /* structure assignment */
 390
 391         if (zcmd_read_dst_nvlist(zhp->zfs_hdl, zc, &allprops) != 0) {
 392                 return (-1);
 393         }
 394
 395         /*
 396          * XXX Why do we store the user props separately, in addition to
 397          * storing them in zfs_props?
 398          */
 399         if ((userprops = process_user_props(zhp, allprops)) == NULL) {
 400                 nvlist_free(allprops);
 401                 return (-1);
 402         }
 403
 404         nvlist_free(zhp->zfs_props);
 405         nvlist_free(zhp->zfs_user_props);
 406
 407         zhp->zfs_props = allprops;
 408         zhp->zfs_user_props = userprops;
 409
 410         return (0);
 411 }
 412
 413 static int
 414 get_stats(zfs_handle_t *zhp)
 415 {
 416         int rc = 0;
 417         zfs_cmd_t zc = {"\0"};
 418
 419         if (zcmd_alloc_dst_nvlist(zhp->zfs_hdl, &zc, 0) != 0)
 420                 return (-1);
 421         if (get_stats_ioctl(zhp, &zc) != 0)
 422                 rc = -1;
 423         else if (put_stats_zhdl(zhp, &zc) != 0)
 424                 rc = -1;
 425         zcmd_free_nvlists(&zc);
 426         return (rc);
 427 }
 428
 429 /*
 430  * Refresh the properties currently stored in the handle.
 431  */
 432 void
 433 zfs_refresh_properties(zfs_handle_t *zhp)
 434 {
 435         (void) get_stats(zhp);
 436 }
 437
 438 /*
 439  * Makes a handle from the given dataset name.  Used by zfs_open() and
 440  * zfs_iter_* to create child handles on the fly.
 441  */
 442 static int
 443 make_dataset_handle_common(zfs_handle_t *zhp, zfs_cmd_t *zc)
 444 {
 445         if (put_stats_zhdl(zhp, zc) != 0)
 446                 return (-1);
 447
 448         /*
 449          * We've managed to open the dataset and gather statistics.  Determine
 450          * the high-level type.
 451          */
 452         if (zhp->zfs_dmustats.dds_type == DMU_OST_ZVOL)
 453                 zhp->zfs_head_type = ZFS_TYPE_VOLUME;
 454         else if (zhp->zfs_dmustats.dds_type == DMU_OST_ZFS)
 455                 zhp->zfs_head_type = ZFS_TYPE_FILESYSTEM;
 456         else if (zhp->zfs_dmustats.dds_type == DMU_OST_OTHER)
 457                 return (-1);
 458         else
 459                 abort();
 460
 461         if (zhp->zfs_dmustats.dds_is_snapshot)
 462                 zhp->zfs_type = ZFS_TYPE_SNAPSHOT;
 463         else if (zhp->zfs_dmustats.dds_type == DMU_OST_ZVOL)
 464                 zhp->zfs_type = ZFS_TYPE_VOLUME;
 465         else if (zhp->zfs_dmustats.dds_type == DMU_OST_ZFS)
 466                 zhp->zfs_type = ZFS_TYPE_FILESYSTEM;
 467         else
 468                 abort();        /* we should never see any other types */
 469
 470         if ((zhp->zpool_hdl = zpool_handle(zhp)) == NULL)
 471                 return (-1);
 472
 473         return (0);
 474 }
 475
 476 zfs_handle_t *
 477 make_dataset_handle(libzfs_handle_t *hdl, const char *path)
 478 {
 479         zfs_cmd_t zc = {"\0"};
 480
 481         zfs_handle_t *zhp = calloc(1, sizeof (zfs_handle_t));
 482
 483         if (zhp == NULL)
 484                 return (NULL);
 485
 486         zhp->zfs_hdl = hdl;
 487         (void) strlcpy(zhp->zfs_name, path, sizeof (zhp->zfs_name));
 488         if (zcmd_alloc_dst_nvlist(hdl, &zc, 0) != 0) {
 489                 free(zhp);
 490                 return (NULL);
 491         }
 492         if (get_stats_ioctl(zhp, &zc) == -1) {
 493                 zcmd_free_nvlists(&zc);
 494                 free(zhp);
 495                 return (NULL);
 496         }
 497         if (make_dataset_handle_common(zhp, &zc) == -1) {
 498                 free(zhp);
 499                 zhp = NULL;
 500         }
 501         zcmd_free_nvlists(&zc);
 502         return (zhp);
 503 }
 504
 505 zfs_handle_t *
 506 make_dataset_handle_zc(libzfs_handle_t *hdl, zfs_cmd_t *zc)
 507 {
 508         zfs_handle_t *zhp = calloc(1, sizeof (zfs_handle_t));
 509
 510         if (zhp == NULL)
 511                 return (NULL);
 512
 513         zhp->zfs_hdl = hdl;
 514         (void) strlcpy(zhp->zfs_name, zc->zc_name, sizeof (zhp->zfs_name));
 515         if (make_dataset_handle_common(zhp, zc) == -1) {
 516                 free(zhp);
 517                 return (NULL);
 518         }
 519         return (zhp);
 520 }
 521
 522 zfs_handle_t *
 523 make_dataset_simple_handle_zc(zfs_handle_t *pzhp, zfs_cmd_t *zc)
 524 {
 525         zfs_handle_t *zhp = calloc(1, sizeof (zfs_handle_t));
 526
 527         if (zhp == NULL)
 528                 return (NULL);
 529
 530         zhp->zfs_hdl = pzhp->zfs_hdl;
 531         (void) strlcpy(zhp->zfs_name, zc->zc_name, sizeof (zhp->zfs_name));
 532         zhp->zfs_head_type = pzhp->zfs_type;
 533         zhp->zfs_type = ZFS_TYPE_SNAPSHOT;
 534         zhp->zpool_hdl = zpool_handle(zhp);
 535
 536         return (zhp);
 537 }
 538
 539 zfs_handle_t *
 540 zfs_handle_dup(zfs_handle_t *zhp_orig)
 541 {
 542         zfs_handle_t *zhp = calloc(1, sizeof (zfs_handle_t));
 543
 544         if (zhp == NULL)
 545                 return (NULL);
 546
 547         zhp->zfs_hdl = zhp_orig->zfs_hdl;
 548         zhp->zpool_hdl = zhp_orig->zpool_hdl;
 549         (void) strlcpy(zhp->zfs_name, zhp_orig->zfs_name,
 550             sizeof (zhp->zfs_name));
 551         zhp->zfs_type = zhp_orig->zfs_type;
 552         zhp->zfs_head_type = zhp_orig->zfs_head_type;
 553         zhp->zfs_dmustats = zhp_orig->zfs_dmustats;
 554         if (zhp_orig->zfs_props != NULL) {
 555                 if (nvlist_dup(zhp_orig->zfs_props, &zhp->zfs_props, 0) != 0) {
 556                         (void) no_memory(zhp->zfs_hdl);
 557                         zfs_close(zhp);
 558                         return (NULL);
 559                 }
 560         }
 561         if (zhp_orig->zfs_user_props != NULL) {
 562                 if (nvlist_dup(zhp_orig->zfs_user_props,
 563                     &zhp->zfs_user_props, 0) != 0) {
 564                         (void) no_memory(zhp->zfs_hdl);
 565                         zfs_close(zhp);
 566                         return (NULL);
 567                 }
 568         }
 569         if (zhp_orig->zfs_recvd_props != NULL) {
 570                 if (nvlist_dup(zhp_orig->zfs_recvd_props,
 571                     &zhp->zfs_recvd_props, 0)) {
 572                         (void) no_memory(zhp->zfs_hdl);
 573                         zfs_close(zhp);
 574                         return (NULL);
 575                 }
 576         }
 577         zhp->zfs_mntcheck = zhp_orig->zfs_mntcheck;
 578         if (zhp_orig->zfs_mntopts != NULL) {
 579                 zhp->zfs_mntopts = zfs_strdup(zhp_orig->zfs_hdl,
 580                     zhp_orig->zfs_mntopts);
 581         }
 582         zhp->zfs_props_table = zhp_orig->zfs_props_table;
 583         return (zhp);
 584 }
 585
 586 boolean_t
 587 zfs_bookmark_exists(const char *path)
 588 {
 589         nvlist_t *bmarks;
 590         nvlist_t *props;
 591         char fsname[ZFS_MAX_DATASET_NAME_LEN];
 592         char *bmark_name;
 593         char *pound;
 594         int err;
 595         boolean_t rv;
 596
 597         (void) strlcpy(fsname, path, sizeof (fsname));
 598         pound = strchr(fsname, '#');
 599         if (pound == NULL)
 600                 return (B_FALSE);
 601
 602         *pound = '\0';
 603         bmark_name = pound + 1;
 604         props = fnvlist_alloc();
 605         err = lzc_get_bookmarks(fsname, props, &bmarks);
 606         nvlist_free(props);
 607         if (err != 0) {
 608                 nvlist_free(bmarks);
 609                 return (B_FALSE);
 610         }
 611
 612         rv = nvlist_exists(bmarks, bmark_name);
 613         nvlist_free(bmarks);
 614         return (rv);
 615 }
 616
 617 zfs_handle_t *
 618 make_bookmark_handle(zfs_handle_t *parent, const char *path,
 619     nvlist_t *bmark_props)
 620 {
 621         zfs_handle_t *zhp = calloc(1, sizeof (zfs_handle_t));
 622
 623         if (zhp == NULL)
 624                 return (NULL);
 625
 626         /* Fill in the name. */
 627         zhp->zfs_hdl = parent->zfs_hdl;
 628         (void) strlcpy(zhp->zfs_name, path, sizeof (zhp->zfs_name));
 629
 630         /* Set the property lists. */
 631         if (nvlist_dup(bmark_props, &zhp->zfs_props, 0) != 0) {
 632                 free(zhp);
 633                 return (NULL);
 634         }
 635
 636         /* Set the types. */
 637         zhp->zfs_head_type = parent->zfs_head_type;
 638         zhp->zfs_type = ZFS_TYPE_BOOKMARK;
 639
 640         if ((zhp->zpool_hdl = zpool_handle(zhp)) == NULL) {
 641                 nvlist_free(zhp->zfs_props);
 642                 free(zhp);
 643                 return (NULL);
 644         }
 645
 646         return (zhp);
 647 }
 648
 649 struct zfs_open_bookmarks_cb_data {
 650         const char *path;
 651         zfs_handle_t *zhp;
 652 };
 653
 654 static int
 655 zfs_open_bookmarks_cb(zfs_handle_t *zhp, void *data)
 656 {
 657         struct zfs_open_bookmarks_cb_data *dp = data;
 658
 659         /*
 660          * Is it the one we are looking for?
 661          */
 662         if (strcmp(dp->path, zfs_get_name(zhp)) == 0) {
 663                 /*
 664                  * We found it.  Save it and let the caller know we are done.
 665                  */
 666                 dp->zhp = zhp;
 667                 return (EEXIST);
 668         }
 669
 670         /*
 671          * Not found.  Close the handle and ask for another one.
 672          */
 673         zfs_close(zhp);
 674         return (0);
 675 }
 676
 677 /*
 678  * Opens the given snapshot, bookmark, filesystem, or volume.   The 'types'
 679  * argument is a mask of acceptable types.  The function will print an
 680  * appropriate error message and return NULL if it can't be opened.
 681  */
 682 zfs_handle_t *
 683 zfs_open(libzfs_handle_t *hdl, const char *path, int types)
 684 {
 685         zfs_handle_t *zhp;
 686         char errbuf[1024];
 687         char *bookp;
 688
 689         (void) snprintf(errbuf, sizeof (errbuf),
 690             dgettext(TEXT_DOMAIN, "cannot open '%s'"), path);
 691
 692         /*
 693          * Validate the name before we even try to open it.
 694          */
 695         if (!zfs_validate_name(hdl, path, types, B_FALSE)) {
 696                 (void) zfs_error(hdl, EZFS_INVALIDNAME, errbuf);
 697                 return (NULL);
 698         }
 699
 700         /*
 701          * Bookmarks needs to be handled separately.
 702          */
 703         bookp = strchr(path, '#');
 704         if (bookp == NULL) {
 705                 /*
 706                  * Try to get stats for the dataset, which will tell us if it
 707                  * exists.
 708                  */
 709                 errno = 0;
 710                 if ((zhp = make_dataset_handle(hdl, path)) == NULL) {
 711                         (void) zfs_standard_error(hdl, errno, errbuf);
 712                         return (NULL);
 713                 }
 714         } else {
 715                 char dsname[ZFS_MAX_DATASET_NAME_LEN];
 716                 zfs_handle_t *pzhp;
 717                 struct zfs_open_bookmarks_cb_data cb_data = {path, NULL};
 718
 719                 /*
 720                  * We need to cut out '#' and everything after '#'
 721                  * to get the parent dataset name only.
 722                  */
 723                 assert(bookp - path < sizeof (dsname));
 724                 (void) strncpy(dsname, path, bookp - path);
 725                 dsname[bookp - path] = '\0';
 726
 727                 /*
 728                  * Create handle for the parent dataset.
 729                  */
 730                 errno = 0;
 731                 if ((pzhp = make_dataset_handle(hdl, dsname)) == NULL) {
 732                         (void) zfs_standard_error(hdl, errno, errbuf);
 733                         return (NULL);
 734                 }
 735
 736                 /*
 737                  * Iterate bookmarks to find the right one.
 738                  */
 739                 errno = 0;
 740                 if ((zfs_iter_bookmarks(pzhp, zfs_open_bookmarks_cb,
 741                     &cb_data) == 0) && (cb_data.zhp == NULL)) {
 742                         (void) zfs_error(hdl, EZFS_NOENT, errbuf);
 743                         zfs_close(pzhp);
 744                         return (NULL);
 745                 }
 746                 if (cb_data.zhp == NULL) {
 747                         (void) zfs_standard_error(hdl, errno, errbuf);
 748                         zfs_close(pzhp);
 749                         return (NULL);
 750                 }
 751                 zhp = cb_data.zhp;
 752
 753                 /*
 754                  * Cleanup.
 755                  */
 756                 zfs_close(pzhp);
 757         }
 758
 759         if (!(types & zhp->zfs_type)) {
 760                 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf);
 761                 zfs_close(zhp);
 762                 return (NULL);
 763         }
 764
 765         return (zhp);
 766 }
 767
 768 /*
 769  * Release a ZFS handle.  Nothing to do but free the associated memory.
 770  */
 771 void
 772 zfs_close(zfs_handle_t *zhp)
 773 {
 774         if (zhp->zfs_mntopts)
 775                 free(zhp->zfs_mntopts);
 776         nvlist_free(zhp->zfs_props);
 777         nvlist_free(zhp->zfs_user_props);
 778         nvlist_free(zhp->zfs_recvd_props);
 779         free(zhp);
 780 }
 781
 782 typedef struct mnttab_node {
 783         struct mnttab mtn_mt;
 784         avl_node_t mtn_node;
 785 } mnttab_node_t;
 786
 787 static int
 788 libzfs_mnttab_cache_compare(const void *arg1, const void *arg2)
 789 {
 790         const mnttab_node_t *mtn1 = (const mnttab_node_t *)arg1;
 791         const mnttab_node_t *mtn2 = (const mnttab_node_t *)arg2;
 792         int rv;
 793
 794         rv = strcmp(mtn1->mtn_mt.mnt_special, mtn2->mtn_mt.mnt_special);
 795
 796         return (TREE_ISIGN(rv));
 797 }
 798
 799 void
 800 libzfs_mnttab_init(libzfs_handle_t *hdl)
 801 {
 802         pthread_mutex_init(&hdl->libzfs_mnttab_cache_lock, NULL);
 803         assert(avl_numnodes(&hdl->libzfs_mnttab_cache) == 0);
 804         avl_create(&hdl->libzfs_mnttab_cache, libzfs_mnttab_cache_compare,
 805             sizeof (mnttab_node_t), offsetof(mnttab_node_t, mtn_node));
 806 }
 807
 808 static int
 809 libzfs_mnttab_update(libzfs_handle_t *hdl)
 810 {
 811         FILE *mnttab;
 812         struct mnttab entry;
 813
 814         if ((mnttab = fopen(MNTTAB, "re")) == NULL)
 815                 return (ENOENT);
 816
 817         while (getmntent(mnttab, &entry) == 0) {
 818                 mnttab_node_t *mtn;
 819                 avl_index_t where;
 820
 821                 if (strcmp(entry.mnt_fstype, MNTTYPE_ZFS) != 0)
 822                         continue;
 823
 824                 mtn = zfs_alloc(hdl, sizeof (mnttab_node_t));
 825                 mtn->mtn_mt.mnt_special = zfs_strdup(hdl, entry.mnt_special);
 826                 mtn->mtn_mt.mnt_mountp = zfs_strdup(hdl, entry.mnt_mountp);
 827                 mtn->mtn_mt.mnt_fstype = zfs_strdup(hdl, entry.mnt_fstype);
 828                 mtn->mtn_mt.mnt_mntopts = zfs_strdup(hdl, entry.mnt_mntopts);
 829
 830                 /* Exclude duplicate mounts */
 831                 if (avl_find(&hdl->libzfs_mnttab_cache, mtn, &where) != NULL) {
 832                         free(mtn->mtn_mt.mnt_special);
 833                         free(mtn->mtn_mt.mnt_mountp);
 834                         free(mtn->mtn_mt.mnt_fstype);
 835                         free(mtn->mtn_mt.mnt_mntopts);
 836                         free(mtn);
 837                         continue;
 838                 }
 839
 840                 avl_add(&hdl->libzfs_mnttab_cache, mtn);
 841         }
 842
 843         (void) fclose(mnttab);
 844         return (0);
 845 }
 846
 847 void
 848 libzfs_mnttab_fini(libzfs_handle_t *hdl)
 849 {
 850         void *cookie = NULL;
 851         mnttab_node_t *mtn;
 852
 853         while ((mtn = avl_destroy_nodes(&hdl->libzfs_mnttab_cache, &cookie))
 854             != NULL) {
 855                 free(mtn->mtn_mt.mnt_special);
 856                 free(mtn->mtn_mt.mnt_mountp);
 857                 free(mtn->mtn_mt.mnt_fstype);
 858                 free(mtn->mtn_mt.mnt_mntopts);
 859                 free(mtn);
 860         }
 861         avl_destroy(&hdl->libzfs_mnttab_cache);
 862         (void) pthread_mutex_destroy(&hdl->libzfs_mnttab_cache_lock);
 863 }
 864
 865 void
 866 libzfs_mnttab_cache(libzfs_handle_t *hdl, boolean_t enable)
 867 {
 868         hdl->libzfs_mnttab_enable = enable;
 869 }
 870
 871 int
 872 libzfs_mnttab_find(libzfs_handle_t *hdl, const char *fsname,
 873     struct mnttab *entry)
 874 {
 875         FILE *mnttab;
 876         mnttab_node_t find;
 877         mnttab_node_t *mtn;
 878         int ret = ENOENT;
 879
 880         if (!hdl->libzfs_mnttab_enable) {
 881                 struct mnttab srch = { 0 };
 882
 883                 if (avl_numnodes(&hdl->libzfs_mnttab_cache))
 884                         libzfs_mnttab_fini(hdl);
 885
 886                 if ((mnttab = fopen(MNTTAB, "re")) == NULL)
 887                         return (ENOENT);
 888
 889                 srch.mnt_special = (char *)fsname;
 890                 srch.mnt_fstype = MNTTYPE_ZFS;
 891                 ret = getmntany(mnttab, entry, &srch) ? ENOENT : 0;
 892                 (void) fclose(mnttab);
 893                 return (ret);
 894         }
 895
 896         pthread_mutex_lock(&hdl->libzfs_mnttab_cache_lock);
 897         if (avl_numnodes(&hdl->libzfs_mnttab_cache) == 0) {
 898                 int error;
 899
 900                 if ((error = libzfs_mnttab_update(hdl)) != 0) {
 901                         pthread_mutex_unlock(&hdl->libzfs_mnttab_cache_lock);
 902                         return (error);
 903                 }
 904         }
 905
 906         find.mtn_mt.mnt_special = (char *)fsname;
 907         mtn = avl_find(&hdl->libzfs_mnttab_cache, &find, NULL);
 908         if (mtn) {
 909                 *entry = mtn->mtn_mt;
 910                 ret = 0;
 911         }
 912         pthread_mutex_unlock(&hdl->libzfs_mnttab_cache_lock);
 913         return (ret);
 914 }
 915
 916 void
 917 libzfs_mnttab_add(libzfs_handle_t *hdl, const char *special,
 918     const char *mountp, const char *mntopts)
 919 {
 920         mnttab_node_t *mtn;
 921
 922         pthread_mutex_lock(&hdl->libzfs_mnttab_cache_lock);
 923         if (avl_numnodes(&hdl->libzfs_mnttab_cache) != 0) {
 924                 mtn = zfs_alloc(hdl, sizeof (mnttab_node_t));
 925                 mtn->mtn_mt.mnt_special = zfs_strdup(hdl, special);
 926                 mtn->mtn_mt.mnt_mountp = zfs_strdup(hdl, mountp);
 927                 mtn->mtn_mt.mnt_fstype = zfs_strdup(hdl, MNTTYPE_ZFS);
 928                 mtn->mtn_mt.mnt_mntopts = zfs_strdup(hdl, mntopts);
 929                 /*
 930                  * Another thread may have already added this entry
 931                  * via libzfs_mnttab_update. If so we should skip it.
 932                  */
 933                 if (avl_find(&hdl->libzfs_mnttab_cache, mtn, NULL) != NULL) {
 934                         free(mtn->mtn_mt.mnt_special);
 935                         free(mtn->mtn_mt.mnt_mountp);
 936                         free(mtn->mtn_mt.mnt_fstype);
 937                         free(mtn->mtn_mt.mnt_mntopts);
 938                         free(mtn);
 939                 } else {
 940                         avl_add(&hdl->libzfs_mnttab_cache, mtn);
 941                 }
 942         }
 943         pthread_mutex_unlock(&hdl->libzfs_mnttab_cache_lock);
 944 }
 945
 946 void
 947 libzfs_mnttab_remove(libzfs_handle_t *hdl, const char *fsname)
 948 {
 949         mnttab_node_t find;
 950         mnttab_node_t *ret;
 951
 952         pthread_mutex_lock(&hdl->libzfs_mnttab_cache_lock);
 953         find.mtn_mt.mnt_special = (char *)fsname;
 954         if ((ret = avl_find(&hdl->libzfs_mnttab_cache, (void *)&find, NULL))
 955             != NULL) {
 956                 avl_remove(&hdl->libzfs_mnttab_cache, ret);
 957                 free(ret->mtn_mt.mnt_special);
 958                 free(ret->mtn_mt.mnt_mountp);
 959                 free(ret->mtn_mt.mnt_fstype);
 960                 free(ret->mtn_mt.mnt_mntopts);
 961                 free(ret);
 962         }
 963         pthread_mutex_unlock(&hdl->libzfs_mnttab_cache_lock);
 964 }
 965
 966 int
 967 zfs_spa_version(zfs_handle_t *zhp, int *spa_version)
 968 {
 969         zpool_handle_t *zpool_handle = zhp->zpool_hdl;
 970
 971         if (zpool_handle == NULL)
 972                 return (-1);
 973
 974         *spa_version = zpool_get_prop_int(zpool_handle,
 975             ZPOOL_PROP_VERSION, NULL);
 976         return (0);
 977 }
 978
 979 /*
 980  * The choice of reservation property depends on the SPA version.
 981  */
 982 static int
 983 zfs_which_resv_prop(zfs_handle_t *zhp, zfs_prop_t *resv_prop)
 984 {
 985         int spa_version;
 986
 987         if (zfs_spa_version(zhp, &spa_version) < 0)
 988                 return (-1);
 989
 990         if (spa_version >= SPA_VERSION_REFRESERVATION)
 991                 *resv_prop = ZFS_PROP_REFRESERVATION;
 992         else
 993                 *resv_prop = ZFS_PROP_RESERVATION;
 994
 995         return (0);
 996 }
 997
 998 /*
 999  * Given an nvlist of properties to set, validates that they are correct, and
1000  * parses any numeric properties (index, boolean, etc) if they are specified as
1001  * strings.
1002  */
1003 nvlist_t *
1004 zfs_valid_proplist(libzfs_handle_t *hdl, zfs_type_t type, nvlist_t *nvl,
1005     uint64_t zoned, zfs_handle_t *zhp, zpool_handle_t *zpool_hdl,
1006     boolean_t key_params_ok, const char *errbuf)
1007 {
1008         nvpair_t *elem;
1009         uint64_t intval;
1010         char *strval;
1011         zfs_prop_t prop;
1012         nvlist_t *ret;
1013         int chosen_normal = -1;
1014         int chosen_utf = -1;
1015
1016         if (nvlist_alloc(&ret, NV_UNIQUE_NAME, 0) != 0) {
1017                 (void) no_memory(hdl);
1018                 return (NULL);
1019         }
1020
1021         /*
1022          * Make sure this property is valid and applies to this type.
1023          */
1024
1025         elem = NULL;
1026         while ((elem = nvlist_next_nvpair(nvl, elem)) != NULL) {
1027                 const char *propname = nvpair_name(elem);
1028
1029                 prop = zfs_name_to_prop(propname);
1030                 if (prop == ZPROP_INVAL && zfs_prop_user(propname)) {
1031                         /*
1032                          * This is a user property: make sure it's a
1033                          * string, and that it's less than ZAP_MAXNAMELEN.
1034                          */
1035                         if (nvpair_type(elem) != DATA_TYPE_STRING) {
1036                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1037                                     "'%s' must be a string"), propname);
1038                                 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1039                                 goto error;
1040                         }
1041
1042                         if (strlen(nvpair_name(elem)) >= ZAP_MAXNAMELEN) {
1043                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1044                                     "property name '%s' is too long"),
1045                                     propname);
1046                                 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1047                                 goto error;
1048                         }
1049
1050                         (void) nvpair_value_string(elem, &strval);
1051                         if (nvlist_add_string(ret, propname, strval) != 0) {
1052                                 (void) no_memory(hdl);
1053                                 goto error;
1054                         }
1055                         continue;
1056                 }
1057
1058                 /*
1059                  * Currently, only user properties can be modified on
1060                  * snapshots.
1061                  */
1062                 if (type == ZFS_TYPE_SNAPSHOT) {
1063                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1064                             "this property can not be modified for snapshots"));
1065                         (void) zfs_error(hdl, EZFS_PROPTYPE, errbuf);
1066                         goto error;
1067                 }
1068
1069                 if (prop == ZPROP_INVAL && zfs_prop_userquota(propname)) {
1070                         zfs_userquota_prop_t uqtype;
1071                         char *newpropname = NULL;
1072                         char domain[128];
1073                         uint64_t rid;
1074                         uint64_t valary[3];
1075                         int rc;
1076
1077                         if (userquota_propname_decode(propname, zoned,
1078                             &uqtype, domain, sizeof (domain), &rid) != 0) {
1079                                 zfs_error_aux(hdl,
1080                                     dgettext(TEXT_DOMAIN,
1081                                     "'%s' has an invalid user/group name"),
1082                                     propname);
1083                                 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1084                                 goto error;
1085                         }
1086
1087                         if (uqtype != ZFS_PROP_USERQUOTA &&
1088                             uqtype != ZFS_PROP_GROUPQUOTA &&
1089                             uqtype != ZFS_PROP_USEROBJQUOTA &&
1090                             uqtype != ZFS_PROP_GROUPOBJQUOTA &&
1091                             uqtype != ZFS_PROP_PROJECTQUOTA &&
1092                             uqtype != ZFS_PROP_PROJECTOBJQUOTA) {
1093                                 zfs_error_aux(hdl,
1094                                     dgettext(TEXT_DOMAIN, "'%s' is readonly"),
1095                                     propname);
1096                                 (void) zfs_error(hdl, EZFS_PROPREADONLY,
1097                                     errbuf);
1098                                 goto error;
1099                         }
1100
1101                         if (nvpair_type(elem) == DATA_TYPE_STRING) {
1102                                 (void) nvpair_value_string(elem, &strval);
1103                                 if (strcmp(strval, "none") == 0) {
1104                                         intval = 0;
1105                                 } else if (zfs_nicestrtonum(hdl,
1106                                     strval, &intval) != 0) {
1107                                         (void) zfs_error(hdl,
1108                                             EZFS_BADPROP, errbuf);
1109                                         goto error;
1110                                 }
1111                         } else if (nvpair_type(elem) ==
1112                             DATA_TYPE_UINT64) {
1113                                 (void) nvpair_value_uint64(elem, &intval);
1114                                 if (intval == 0) {
1115                                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1116                                             "use 'none' to disable "
1117                                             "{user|group|project}quota"));
1118                                         goto error;
1119                                 }
1120                         } else {
1121                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1122                                     "'%s' must be a number"), propname);
1123                                 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1124                                 goto error;
1125                         }
1126
1127                         /*
1128                          * Encode the prop name as
1129                          * userquota@<hex-rid>-domain, to make it easy
1130                          * for the kernel to decode.
1131                          */
1132                         rc = asprintf(&newpropname, "%s%llx-%s",
1133                             zfs_userquota_prop_prefixes[uqtype],
1134                             (longlong_t)rid, domain);
1135                         if (rc == -1 || newpropname == NULL) {
1136                                 (void) no_memory(hdl);
1137                                 goto error;
1138                         }
1139
1140                         valary[0] = uqtype;
1141                         valary[1] = rid;
1142                         valary[2] = intval;
1143                         if (nvlist_add_uint64_array(ret, newpropname,
1144                             valary, 3) != 0) {
1145                                 free(newpropname);
1146                                 (void) no_memory(hdl);
1147                                 goto error;
1148                         }
1149                         free(newpropname);
1150                         continue;
1151                 } else if (prop == ZPROP_INVAL && zfs_prop_written(propname)) {
1152                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1153                             "'%s' is readonly"),
1154                             propname);
1155                         (void) zfs_error(hdl, EZFS_PROPREADONLY, errbuf);
1156                         goto error;
1157                 }
1158
1159                 if (prop == ZPROP_INVAL) {
1160                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1161                             "invalid property '%s'"), propname);
1162                         (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1163                         goto error;
1164                 }
1165
1166                 if (!zfs_prop_valid_for_type(prop, type, B_FALSE)) {
1167                         zfs_error_aux(hdl,
1168                             dgettext(TEXT_DOMAIN, "'%s' does not "
1169                             "apply to datasets of this type"), propname);
1170                         (void) zfs_error(hdl, EZFS_PROPTYPE, errbuf);
1171                         goto error;
1172                 }
1173
1174                 if (zfs_prop_readonly(prop) &&
1175                     !(zfs_prop_setonce(prop) && zhp == NULL) &&
1176                     !(zfs_prop_encryption_key_param(prop) && key_params_ok)) {
1177                         zfs_error_aux(hdl,
1178                             dgettext(TEXT_DOMAIN, "'%s' is readonly"),
1179                             propname);
1180                         (void) zfs_error(hdl, EZFS_PROPREADONLY, errbuf);
1181                         goto error;
1182                 }
1183
1184                 if (zprop_parse_value(hdl, elem, prop, type, ret,
1185                     &strval, &intval, errbuf) != 0)
1186                         goto error;
1187
1188                 /*
1189                  * Perform some additional checks for specific properties.
1190                  */
1191                 switch (prop) {
1192                 case ZFS_PROP_VERSION:
1193                 {
1194                         int version;
1195
1196                         if (zhp == NULL)
1197                                 break;
1198                         version = zfs_prop_get_int(zhp, ZFS_PROP_VERSION);
1199                         if (intval < version) {
1200                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1201                                     "Can not downgrade; already at version %u"),
1202                                     version);
1203                                 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1204                                 goto error;
1205                         }
1206                         break;
1207                 }
1208
1209                 case ZFS_PROP_VOLBLOCKSIZE:
1210                 case ZFS_PROP_RECORDSIZE:
1211                 {
1212                         int maxbs = SPA_MAXBLOCKSIZE;
1213                         char buf[64];
1214
1215                         if (zpool_hdl != NULL) {
1216                                 maxbs = zpool_get_prop_int(zpool_hdl,
1217                                     ZPOOL_PROP_MAXBLOCKSIZE, NULL);
1218                         }
1219                         /*
1220                          * The value must be a power of two between
1221                          * SPA_MINBLOCKSIZE and maxbs.
1222                          */
1223                         if (intval < SPA_MINBLOCKSIZE ||
1224                             intval > maxbs || !ISP2(intval)) {
1225                                 zfs_nicebytes(maxbs, buf, sizeof (buf));
1226                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1227                                     "'%s' must be power of 2 from 512B "
1228                                     "to %s"), propname, buf);
1229                                 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1230                                 goto error;
1231                         }
1232                         break;
1233                 }
1234
1235                 case ZFS_PROP_SPECIAL_SMALL_BLOCKS:
1236                 {
1237                         int maxbs = SPA_OLD_MAXBLOCKSIZE;
1238                         char buf[64];
1239
1240                         if (zpool_hdl != NULL) {
1241                                 char state[64] = "";
1242
1243                                 maxbs = zpool_get_prop_int(zpool_hdl,
1244                                     ZPOOL_PROP_MAXBLOCKSIZE, NULL);
1245
1246                                 /*
1247                                  * Issue a warning but do not fail so that
1248                                  * tests for settable properties succeed.
1249                                  */
1250                                 if (zpool_prop_get_feature(zpool_hdl,
1251                                     "feature@allocation_classes", state,
1252                                     sizeof (state)) != 0 ||
1253                                     strcmp(state, ZFS_FEATURE_ACTIVE) != 0) {
1254                                         (void) fprintf(stderr, gettext(
1255                                             "%s: property requires a special "
1256                                             "device in the pool\n"), propname);
1257                                 }
1258                         }
1259                         if (intval != 0 &&
1260                             (intval < SPA_MINBLOCKSIZE ||
1261                             intval > maxbs || !ISP2(intval))) {
1262                                 zfs_nicebytes(maxbs, buf, sizeof (buf));
1263                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1264                                     "invalid '%s=%d' property: must be zero or "
1265                                     "a power of 2 from 512B to %s"), propname,
1266                                     intval, buf);
1267                                 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1268                                 goto error;
1269                         }
1270                         break;
1271                 }
1272
1273                 case ZFS_PROP_MLSLABEL:
1274                 {
1275 #ifdef HAVE_MLSLABEL
1276                         /*
1277                          * Verify the mlslabel string and convert to
1278                          * internal hex label string.
1279                          */
1280
1281                         m_label_t *new_sl;
1282                         char *hex = NULL;       /* internal label string */
1283
1284                         /* Default value is already OK. */
1285                         if (strcasecmp(strval, ZFS_MLSLABEL_DEFAULT) == 0)
1286                                 break;
1287
1288                         /* Verify the label can be converted to binary form */
1289                         if (((new_sl = m_label_alloc(MAC_LABEL)) == NULL) ||
1290                             (str_to_label(strval, &new_sl, MAC_LABEL,
1291                             L_NO_CORRECTION, NULL) == -1)) {
1292                                 goto badlabel;
1293                         }
1294
1295                         /* Now translate to hex internal label string */
1296                         if (label_to_str(new_sl, &hex, M_INTERNAL,
1297                             DEF_NAMES) != 0) {
1298                                 if (hex)
1299                                         free(hex);
1300                                 goto badlabel;
1301                         }
1302                         m_label_free(new_sl);
1303
1304                         /* If string is already in internal form, we're done. */
1305                         if (strcmp(strval, hex) == 0) {
1306                                 free(hex);
1307                                 break;
1308                         }
1309
1310                         /* Replace the label string with the internal form. */
1311                         (void) nvlist_remove(ret, zfs_prop_to_name(prop),
1312                             DATA_TYPE_STRING);
1313                         verify(nvlist_add_string(ret, zfs_prop_to_name(prop),
1314                             hex) == 0);
1315                         free(hex);
1316
1317                         break;
1318
1319 badlabel:
1320                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1321                             "invalid mlslabel '%s'"), strval);
1322                         (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1323                         m_label_free(new_sl);   /* OK if null */
1324                         goto error;
1325 #else
1326                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1327                             "mlslabels are unsupported"));
1328                         (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1329                         goto error;
1330 #endif /* HAVE_MLSLABEL */
1331                 }
1332
1333                 case ZFS_PROP_MOUNTPOINT:
1334                 {
1335                         namecheck_err_t why;
1336
1337                         if (strcmp(strval, ZFS_MOUNTPOINT_NONE) == 0 ||
1338                             strcmp(strval, ZFS_MOUNTPOINT_LEGACY) == 0)
1339                                 break;
1340
1341                         if (mountpoint_namecheck(strval, &why)) {
1342                                 switch (why) {
1343                                 case NAME_ERR_LEADING_SLASH:
1344                                         zfs_error_aux(hdl,
1345                                             dgettext(TEXT_DOMAIN,
1346                                             "'%s' must be an absolute path, "
1347                                             "'none', or 'legacy'"), propname);
1348                                         break;
1349                                 case NAME_ERR_TOOLONG:
1350                                         zfs_error_aux(hdl,
1351                                             dgettext(TEXT_DOMAIN,
1352                                             "component of '%s' is too long"),
1353                                             propname);
1354                                         break;
1355
1356                                 default:
1357                                         zfs_error_aux(hdl,
1358                                             dgettext(TEXT_DOMAIN,
1359                                             "(%d) not defined"),
1360                                             why);
1361                                         break;
1362                                 }
1363                                 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1364                                 goto error;
1365                         }
1366                 }
1367
1368                         /*FALLTHRU*/
1369
1370                 case ZFS_PROP_SHARESMB:
1371                 case ZFS_PROP_SHARENFS:
1372                         /*
1373                          * For the mountpoint and sharenfs or sharesmb
1374                          * properties, check if it can be set in a
1375                          * global/non-global zone based on
1376                          * the zoned property value:
1377                          *
1378                          *              global zone         non-global zone
1379                          * --------------------------------------------------
1380                          * zoned=on     mountpoint (no)     mountpoint (yes)
1381                          *              sharenfs (no)       sharenfs (no)
1382                          *              sharesmb (no)       sharesmb (no)
1383                          *
1384                          * zoned=off    mountpoint (yes)        N/A
1385                          *              sharenfs (yes)
1386                          *              sharesmb (yes)
1387                          */
1388                         if (zoned) {
1389                                 if (getzoneid() == GLOBAL_ZONEID) {
1390                                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1391                                             "'%s' cannot be set on "
1392                                             "dataset in a non-global zone"),
1393                                             propname);
1394                                         (void) zfs_error(hdl, EZFS_ZONED,
1395                                             errbuf);
1396                                         goto error;
1397                                 } else if (prop == ZFS_PROP_SHARENFS ||
1398                                     prop == ZFS_PROP_SHARESMB) {
1399                                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1400                                             "'%s' cannot be set in "
1401                                             "a non-global zone"), propname);
1402                                         (void) zfs_error(hdl, EZFS_ZONED,
1403                                             errbuf);
1404                                         goto error;
1405                                 }
1406                         } else if (getzoneid() != GLOBAL_ZONEID) {
1407                                 /*
1408                                  * If zoned property is 'off', this must be in
1409                                  * a global zone. If not, something is wrong.
1410                                  */
1411                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1412                                     "'%s' cannot be set while dataset "
1413                                     "'zoned' property is set"), propname);
1414                                 (void) zfs_error(hdl, EZFS_ZONED, errbuf);
1415                                 goto error;
1416                         }
1417
1418                         /*
1419                          * At this point, it is legitimate to set the
1420                          * property. Now we want to make sure that the
1421                          * property value is valid if it is sharenfs.
1422                          */
1423                         if ((prop == ZFS_PROP_SHARENFS ||
1424                             prop == ZFS_PROP_SHARESMB) &&
1425                             strcmp(strval, "on") != 0 &&
1426                             strcmp(strval, "off") != 0) {
1427                                 zfs_share_proto_t proto;
1428
1429                                 if (prop == ZFS_PROP_SHARESMB)
1430                                         proto = PROTO_SMB;
1431                                 else
1432                                         proto = PROTO_NFS;
1433
1434                                 if (zfs_parse_options(strval, proto) != SA_OK) {
1435                                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1436                                             "'%s' cannot be set to invalid "
1437                                             "options"), propname);
1438                                         (void) zfs_error(hdl, EZFS_BADPROP,
1439                                             errbuf);
1440                                         goto error;
1441                                 }
1442                         }
1443
1444                         break;
1445
1446                 case ZFS_PROP_KEYLOCATION:
1447                         if (!zfs_prop_valid_keylocation(strval, B_FALSE)) {
1448                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1449                                     "invalid keylocation"));
1450                                 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1451                                 goto error;
1452                         }
1453
1454                         if (zhp != NULL) {
1455                                 uint64_t crypt =
1456                                     zfs_prop_get_int(zhp, ZFS_PROP_ENCRYPTION);
1457
1458                                 if (crypt == ZIO_CRYPT_OFF &&
1459                                     strcmp(strval, "none") != 0) {
1460                                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1461                                             "keylocation must be 'none' "
1462                                             "for unencrypted datasets"));
1463                                         (void) zfs_error(hdl, EZFS_BADPROP,
1464                                             errbuf);
1465                                         goto error;
1466                                 } else if (crypt != ZIO_CRYPT_OFF &&
1467                                     strcmp(strval, "none") == 0) {
1468                                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1469                                             "keylocation must not be 'none' "
1470                                             "for encrypted datasets"));
1471                                         (void) zfs_error(hdl, EZFS_BADPROP,
1472                                             errbuf);
1473                                         goto error;
1474                                 }
1475                         }
1476                         break;
1477
1478                 case ZFS_PROP_PBKDF2_ITERS:
1479                         if (intval < MIN_PBKDF2_ITERATIONS) {
1480                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1481                                     "minimum pbkdf2 iterations is %u"),
1482                                     MIN_PBKDF2_ITERATIONS);
1483                                 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1484                                 goto error;
1485                         }
1486                         break;
1487
1488                 case ZFS_PROP_UTF8ONLY:
1489                         chosen_utf = (int)intval;
1490                         break;
1491
1492                 case ZFS_PROP_NORMALIZE:
1493                         chosen_normal = (int)intval;
1494                         break;
1495
1496                 default:
1497                         break;
1498                 }
1499
1500                 /*
1501                  * For changes to existing volumes, we have some additional
1502                  * checks to enforce.
1503                  */
1504                 if (type == ZFS_TYPE_VOLUME && zhp != NULL) {
1505                         uint64_t blocksize = zfs_prop_get_int(zhp,
1506                             ZFS_PROP_VOLBLOCKSIZE);
1507                         char buf[64];
1508
1509                         switch (prop) {
1510                         case ZFS_PROP_VOLSIZE:
1511                                 if (intval % blocksize != 0) {
1512                                         zfs_nicebytes(blocksize, buf,
1513                                             sizeof (buf));
1514                                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1515                                             "'%s' must be a multiple of "
1516                                             "volume block size (%s)"),
1517                                             propname, buf);
1518                                         (void) zfs_error(hdl, EZFS_BADPROP,
1519                                             errbuf);
1520                                         goto error;
1521                                 }
1522
1523                                 if (intval == 0) {
1524                                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1525                                             "'%s' cannot be zero"),
1526                                             propname);
1527                                         (void) zfs_error(hdl, EZFS_BADPROP,
1528                                             errbuf);
1529                                         goto error;
1530                                 }
1531                                 break;
1532
1533                         default:
1534                                 break;
1535                         }
1536                 }
1537
1538                 /* check encryption properties */
1539                 if (zhp != NULL) {
1540                         int64_t crypt = zfs_prop_get_int(zhp,
1541                             ZFS_PROP_ENCRYPTION);
1542
1543                         switch (prop) {
1544                         case ZFS_PROP_COPIES:
1545                                 if (crypt != ZIO_CRYPT_OFF && intval > 2) {
1546                                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1547                                             "encrypted datasets cannot have "
1548                                             "3 copies"));
1549                                         (void) zfs_error(hdl, EZFS_BADPROP,
1550                                             errbuf);
1551                                         goto error;
1552                                 }
1553                                 break;
1554                         default:
1555                                 break;
1556                         }
1557                 }
1558         }
1559
1560         /*
1561          * If normalization was chosen, but no UTF8 choice was made,
1562          * enforce rejection of non-UTF8 names.
1563          *
1564          * If normalization was chosen, but rejecting non-UTF8 names
1565          * was explicitly not chosen, it is an error.
1566          */
1567         if (chosen_normal > 0 && chosen_utf < 0) {
1568                 if (nvlist_add_uint64(ret,
1569                     zfs_prop_to_name(ZFS_PROP_UTF8ONLY), 1) != 0) {
1570                         (void) no_memory(hdl);
1571                         goto error;
1572                 }
1573         } else if (chosen_normal > 0 && chosen_utf == 0) {
1574                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1575                     "'%s' must be set 'on' if normalization chosen"),
1576                     zfs_prop_to_name(ZFS_PROP_UTF8ONLY));
1577                 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1578                 goto error;
1579         }
1580         return (ret);
1581
1582 error:
1583         nvlist_free(ret);
1584         return (NULL);
1585 }
1586
1587 static int
1588 zfs_add_synthetic_resv(zfs_handle_t *zhp, nvlist_t *nvl)
1589 {
1590         uint64_t old_volsize;
1591         uint64_t new_volsize;
1592         uint64_t old_reservation;
1593         uint64_t new_reservation;
1594         zfs_prop_t resv_prop;
1595         nvlist_t *props;
1596         zpool_handle_t *zph = zpool_handle(zhp);
1597
1598         /*
1599          * If this is an existing volume, and someone is setting the volsize,
1600          * make sure that it matches the reservation, or add it if necessary.
1601          */
1602         old_volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE);
1603         if (zfs_which_resv_prop(zhp, &resv_prop) < 0)
1604                 return (-1);
1605         old_reservation = zfs_prop_get_int(zhp, resv_prop);
1606
1607         props = fnvlist_alloc();
1608         fnvlist_add_uint64(props, zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE),
1609             zfs_prop_get_int(zhp, ZFS_PROP_VOLBLOCKSIZE));
1610
1611         if ((zvol_volsize_to_reservation(zph, old_volsize, props) !=
1612             old_reservation) || nvlist_exists(nvl,
1613             zfs_prop_to_name(resv_prop))) {
1614                 fnvlist_free(props);
1615                 return (0);
1616         }
1617         if (nvlist_lookup_uint64(nvl, zfs_prop_to_name(ZFS_PROP_VOLSIZE),
1618             &new_volsize) != 0) {
1619                 fnvlist_free(props);
1620                 return (-1);
1621         }
1622         new_reservation = zvol_volsize_to_reservation(zph, new_volsize, props);
1623         fnvlist_free(props);
1624
1625         if (nvlist_add_uint64(nvl, zfs_prop_to_name(resv_prop),
1626             new_reservation) != 0) {
1627                 (void) no_memory(zhp->zfs_hdl);
1628                 return (-1);
1629         }
1630         return (1);
1631 }
1632
1633 /*
1634  * Helper for 'zfs {set|clone} refreservation=auto'.  Must be called after
1635  * zfs_valid_proplist(), as it is what sets the UINT64_MAX sentinel value.
1636  * Return codes must match zfs_add_synthetic_resv().
1637  */
1638 static int
1639 zfs_fix_auto_resv(zfs_handle_t *zhp, nvlist_t *nvl)
1640 {
1641         uint64_t volsize;
1642         uint64_t resvsize;
1643         zfs_prop_t prop;
1644         nvlist_t *props;
1645
1646         if (!ZFS_IS_VOLUME(zhp)) {
1647                 return (0);
1648         }
1649
1650         if (zfs_which_resv_prop(zhp, &prop) != 0) {
1651                 return (-1);
1652         }
1653
1654         if (prop != ZFS_PROP_REFRESERVATION) {
1655                 return (0);
1656         }
1657
1658         if (nvlist_lookup_uint64(nvl, zfs_prop_to_name(prop), &resvsize) != 0) {
1659                 /* No value being set, so it can't be "auto" */
1660                 return (0);
1661         }
1662         if (resvsize != UINT64_MAX) {
1663                 /* Being set to a value other than "auto" */
1664                 return (0);
1665         }
1666
1667         props = fnvlist_alloc();
1668
1669         fnvlist_add_uint64(props, zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE),
1670             zfs_prop_get_int(zhp, ZFS_PROP_VOLBLOCKSIZE));
1671
1672         if (nvlist_lookup_uint64(nvl, zfs_prop_to_name(ZFS_PROP_VOLSIZE),
1673             &volsize) != 0) {
1674                 volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE);
1675         }
1676
1677         resvsize = zvol_volsize_to_reservation(zpool_handle(zhp), volsize,
1678             props);
1679         fnvlist_free(props);
1680
1681         (void) nvlist_remove_all(nvl, zfs_prop_to_name(prop));
1682         if (nvlist_add_uint64(nvl, zfs_prop_to_name(prop), resvsize) != 0) {
1683                 (void) no_memory(zhp->zfs_hdl);
1684                 return (-1);
1685         }
1686         return (1);
1687 }
1688
1689 static boolean_t
1690 zfs_is_namespace_prop(zfs_prop_t prop)
1691 {
1692         switch (prop) {
1693
1694         case ZFS_PROP_ATIME:
1695         case ZFS_PROP_RELATIME:
1696         case ZFS_PROP_DEVICES:
1697         case ZFS_PROP_EXEC:
1698         case ZFS_PROP_SETUID:
1699         case ZFS_PROP_READONLY:
1700         case ZFS_PROP_XATTR:
1701         case ZFS_PROP_NBMAND:
1702                 return (B_TRUE);
1703
1704         default:
1705                 return (B_FALSE);
1706         }
1707 }
1708
1709 /*
1710  * Given a property name and value, set the property for the given dataset.
1711  */
1712 int
1713 zfs_prop_set(zfs_handle_t *zhp, const char *propname, const char *propval)
1714 {
1715         int ret = -1;
1716         char errbuf[1024];
1717         libzfs_handle_t *hdl = zhp->zfs_hdl;
1718         nvlist_t *nvl = NULL;
1719
1720         (void) snprintf(errbuf, sizeof (errbuf),
1721             dgettext(TEXT_DOMAIN, "cannot set property for '%s'"),
1722             zhp->zfs_name);
1723
1724         if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0) != 0 ||
1725             nvlist_add_string(nvl, propname, propval) != 0) {
1726                 (void) no_memory(hdl);
1727                 goto error;
1728         }
1729
1730         ret = zfs_prop_set_list(zhp, nvl);
1731
1732 error:
1733         nvlist_free(nvl);
1734         return (ret);
1735 }
1736
1737
1738
1739 /*
1740  * Given an nvlist of property names and values, set the properties for the
1741  * given dataset.
1742  */
1743 int
1744 zfs_prop_set_list(zfs_handle_t *zhp, nvlist_t *props)
1745 {
1746         zfs_cmd_t zc = {"\0"};
1747         int ret = -1;
1748         prop_changelist_t **cls = NULL;
1749         int cl_idx;
1750         char errbuf[1024];
1751         libzfs_handle_t *hdl = zhp->zfs_hdl;
1752         nvlist_t *nvl;
1753         int nvl_len = 0;
1754         int added_resv = 0;
1755         zfs_prop_t prop = 0;
1756         nvpair_t *elem;
1757
1758         (void) snprintf(errbuf, sizeof (errbuf),
1759             dgettext(TEXT_DOMAIN, "cannot set property for '%s'"),
1760             zhp->zfs_name);
1761
1762         if ((nvl = zfs_valid_proplist(hdl, zhp->zfs_type, props,
1763             zfs_prop_get_int(zhp, ZFS_PROP_ZONED), zhp, zhp->zpool_hdl,
1764             B_FALSE, errbuf)) == NULL)
1765                 goto error;
1766
1767         /*
1768          * We have to check for any extra properties which need to be added
1769          * before computing the length of the nvlist.
1770          */
1771         for (elem = nvlist_next_nvpair(nvl, NULL);
1772             elem != NULL;
1773             elem = nvlist_next_nvpair(nvl, elem)) {
1774                 if (zfs_name_to_prop(nvpair_name(elem)) == ZFS_PROP_VOLSIZE &&
1775                     (added_resv = zfs_add_synthetic_resv(zhp, nvl)) == -1) {
1776                         goto error;
1777                 }
1778         }
1779
1780         if (added_resv != 1 &&
1781             (added_resv = zfs_fix_auto_resv(zhp, nvl)) == -1) {
1782                 goto error;
1783         }
1784
1785         /*
1786          * Check how many properties we're setting and allocate an array to
1787          * store changelist pointers for postfix().
1788          */
1789         for (elem = nvlist_next_nvpair(nvl, NULL);
1790             elem != NULL;
1791             elem = nvlist_next_nvpair(nvl, elem))
1792                 nvl_len++;
1793         if ((cls = calloc(nvl_len, sizeof (prop_changelist_t *))) == NULL)
1794                 goto error;
1795
1796         cl_idx = 0;
1797         for (elem = nvlist_next_nvpair(nvl, NULL);
1798             elem != NULL;
1799             elem = nvlist_next_nvpair(nvl, elem)) {
1800
1801                 prop = zfs_name_to_prop(nvpair_name(elem));
1802
1803                 assert(cl_idx < nvl_len);
1804                 /*
1805                  * We don't want to unmount & remount the dataset when changing
1806                  * its canmount property to 'on' or 'noauto'.  We only use
1807                  * the changelist logic to unmount when setting canmount=off.
1808                  */
1809                 if (prop != ZFS_PROP_CANMOUNT ||
1810                     (fnvpair_value_uint64(elem) == ZFS_CANMOUNT_OFF &&
1811                     zfs_is_mounted(zhp, NULL))) {
1812                         cls[cl_idx] = changelist_gather(zhp, prop, 0, 0);
1813                         if (cls[cl_idx] == NULL)
1814                                 goto error;
1815                 }
1816
1817                 if (prop == ZFS_PROP_MOUNTPOINT &&
1818                     changelist_haszonedchild(cls[cl_idx])) {
1819                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1820                             "child dataset with inherited mountpoint is used "
1821                             "in a non-global zone"));
1822                         ret = zfs_error(hdl, EZFS_ZONED, errbuf);
1823                         goto error;
1824                 }
1825
1826                 if (cls[cl_idx] != NULL &&
1827                     (ret = changelist_prefix(cls[cl_idx])) != 0)
1828                         goto error;
1829
1830                 cl_idx++;
1831         }
1832         assert(cl_idx == nvl_len);
1833
1834         /*
1835          * Execute the corresponding ioctl() to set this list of properties.
1836          */
1837         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
1838
1839         if ((ret = zcmd_write_src_nvlist(hdl, &zc, nvl)) != 0 ||
1840             (ret = zcmd_alloc_dst_nvlist(hdl, &zc, 0)) != 0)
1841                 goto error;
1842
1843         ret = zfs_ioctl(hdl, ZFS_IOC_SET_PROP, &zc);
1844
1845         if (ret != 0) {
1846                 if (zc.zc_nvlist_dst_filled == B_FALSE) {
1847                         (void) zfs_standard_error(hdl, errno, errbuf);
1848                         goto error;
1849                 }
1850
1851                 /* Get the list of unset properties back and report them. */
1852                 nvlist_t *errorprops = NULL;
1853                 if (zcmd_read_dst_nvlist(hdl, &zc, &errorprops) != 0)
1854                         goto error;
1855                 for (nvpair_t *elem = nvlist_next_nvpair(errorprops, NULL);
1856                     elem != NULL;
1857                     elem = nvlist_next_nvpair(errorprops, elem)) {
1858                         prop = zfs_name_to_prop(nvpair_name(elem));
1859                         zfs_setprop_error(hdl, prop, errno, errbuf);
1860                 }
1861                 nvlist_free(errorprops);
1862
1863                 if (added_resv && errno == ENOSPC) {
1864                         /* clean up the volsize property we tried to set */
1865                         uint64_t old_volsize = zfs_prop_get_int(zhp,
1866                             ZFS_PROP_VOLSIZE);
1867                         nvlist_free(nvl);
1868                         nvl = NULL;
1869                         zcmd_free_nvlists(&zc);
1870
1871                         if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0) != 0)
1872                                 goto error;
1873                         if (nvlist_add_uint64(nvl,
1874                             zfs_prop_to_name(ZFS_PROP_VOLSIZE),
1875                             old_volsize) != 0)
1876                                 goto error;
1877                         if (zcmd_write_src_nvlist(hdl, &zc, nvl) != 0)
1878                                 goto error;
1879                         (void) zfs_ioctl(hdl, ZFS_IOC_SET_PROP, &zc);
1880                 }
1881         } else {
1882                 for (cl_idx = 0; cl_idx < nvl_len; cl_idx++) {
1883                         if (cls[cl_idx] != NULL) {
1884                                 int clp_err = changelist_postfix(cls[cl_idx]);
1885                                 if (clp_err != 0)
1886                                         ret = clp_err;
1887                         }
1888                 }
1889
1890                 if (ret == 0) {
1891                         /*
1892                          * Refresh the statistics so the new property
1893                          * value is reflected.
1894                          */
1895                         (void) get_stats(zhp);
1896
1897                         /*
1898                          * Remount the filesystem to propagate the change
1899                          * if one of the options handled by the generic
1900                          * Linux namespace layer has been modified.
1901                          */
1902                         if (zfs_is_namespace_prop(prop) &&
1903                             zfs_is_mounted(zhp, NULL))
1904                                 ret = zfs_mount(zhp, MNTOPT_REMOUNT, 0);
1905                 }
1906         }
1907
1908 error:
1909         nvlist_free(nvl);
1910         zcmd_free_nvlists(&zc);
1911         if (cls != NULL) {
1912                 for (cl_idx = 0; cl_idx < nvl_len; cl_idx++) {
1913                         if (cls[cl_idx] != NULL)
1914                                 changelist_free(cls[cl_idx]);
1915                 }
1916                 free(cls);
1917         }
1918         return (ret);
1919 }
1920
1921 /*
1922  * Given a property, inherit the value from the parent dataset, or if received
1923  * is TRUE, revert to the received value, if any.
1924  */
1925 int
1926 zfs_prop_inherit(zfs_handle_t *zhp, const char *propname, boolean_t received)
1927 {
1928         zfs_cmd_t zc = {"\0"};
1929         int ret;
1930         prop_changelist_t *cl;
1931         libzfs_handle_t *hdl = zhp->zfs_hdl;
1932         char errbuf[1024];
1933         zfs_prop_t prop;
1934
1935         (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
1936             "cannot inherit %s for '%s'"), propname, zhp->zfs_name);
1937
1938         zc.zc_cookie = received;
1939         if ((prop = zfs_name_to_prop(propname)) == ZPROP_INVAL) {
1940                 /*
1941                  * For user properties, the amount of work we have to do is very
1942                  * small, so just do it here.
1943                  */
1944                 if (!zfs_prop_user(propname)) {
1945                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1946                             "invalid property"));
1947                         return (zfs_error(hdl, EZFS_BADPROP, errbuf));
1948                 }
1949
1950                 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
1951                 (void) strlcpy(zc.zc_value, propname, sizeof (zc.zc_value));
1952
1953                 if (zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_INHERIT_PROP, &zc) != 0)
1954                         return (zfs_standard_error(hdl, errno, errbuf));
1955
1956                 (void) get_stats(zhp);
1957                 return (0);
1958         }
1959
1960         /*
1961          * Verify that this property is inheritable.
1962          */
1963         if (zfs_prop_readonly(prop))
1964                 return (zfs_error(hdl, EZFS_PROPREADONLY, errbuf));
1965
1966         if (!zfs_prop_inheritable(prop) && !received)
1967                 return (zfs_error(hdl, EZFS_PROPNONINHERIT, errbuf));
1968
1969         /*
1970          * Check to see if the value applies to this type
1971          */
1972         if (!zfs_prop_valid_for_type(prop, zhp->zfs_type, B_FALSE))
1973                 return (zfs_error(hdl, EZFS_PROPTYPE, errbuf));
1974
1975         /*
1976          * Normalize the name, to get rid of shorthand abbreviations.
1977          */
1978         propname = zfs_prop_to_name(prop);
1979         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
1980         (void) strlcpy(zc.zc_value, propname, sizeof (zc.zc_value));
1981
1982         if (prop == ZFS_PROP_MOUNTPOINT && getzoneid() == GLOBAL_ZONEID &&
1983             zfs_prop_get_int(zhp, ZFS_PROP_ZONED)) {
1984                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1985                     "dataset is used in a non-global zone"));
1986                 return (zfs_error(hdl, EZFS_ZONED, errbuf));
1987         }
1988
1989         /*
1990          * Determine datasets which will be affected by this change, if any.
1991          */
1992         if ((cl = changelist_gather(zhp, prop, 0, 0)) == NULL)
1993                 return (-1);
1994
1995         if (prop == ZFS_PROP_MOUNTPOINT && changelist_haszonedchild(cl)) {
1996                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1997                     "child dataset with inherited mountpoint is used "
1998                     "in a non-global zone"));
1999                 ret = zfs_error(hdl, EZFS_ZONED, errbuf);
2000                 goto error;
2001         }
2002
2003         if ((ret = changelist_prefix(cl)) != 0)
2004                 goto error;
2005
2006         if ((ret = zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_INHERIT_PROP, &zc)) != 0) {
2007                 return (zfs_standard_error(hdl, errno, errbuf));
2008         } else {
2009
2010                 if ((ret = changelist_postfix(cl)) != 0)
2011                         goto error;
2012
2013                 /*
2014                  * Refresh the statistics so the new property is reflected.
2015                  */
2016                 (void) get_stats(zhp);
2017
2018                 /*
2019                  * Remount the filesystem to propagate the change
2020                  * if one of the options handled by the generic
2021                  * Linux namespace layer has been modified.
2022                  */
2023                 if (zfs_is_namespace_prop(prop) &&
2024                     zfs_is_mounted(zhp, NULL))
2025                         ret = zfs_mount(zhp, MNTOPT_REMOUNT, 0);
2026         }
2027
2028 error:
2029         changelist_free(cl);
2030         return (ret);
2031 }
2032
2033 /*
2034  * True DSL properties are stored in an nvlist.  The following two functions
2035  * extract them appropriately.
2036  */
2037 uint64_t
2038 getprop_uint64(zfs_handle_t *zhp, zfs_prop_t prop, char **source)
2039 {
2040         nvlist_t *nv;
2041         uint64_t value;
2042
2043         *source = NULL;
2044         if (nvlist_lookup_nvlist(zhp->zfs_props,
2045             zfs_prop_to_name(prop), &nv) == 0) {
2046                 verify(nvlist_lookup_uint64(nv, ZPROP_VALUE, &value) == 0);
2047                 (void) nvlist_lookup_string(nv, ZPROP_SOURCE, source);
2048         } else {
2049                 verify(!zhp->zfs_props_table ||
2050                     zhp->zfs_props_table[prop] == B_TRUE);
2051                 value = zfs_prop_default_numeric(prop);
2052                 *source = "";
2053         }
2054
2055         return (value);
2056 }
2057
2058 static const char *
2059 getprop_string(zfs_handle_t *zhp, zfs_prop_t prop, char **source)
2060 {
2061         nvlist_t *nv;
2062         const char *value;
2063
2064         *source = NULL;
2065         if (nvlist_lookup_nvlist(zhp->zfs_props,
2066             zfs_prop_to_name(prop), &nv) == 0) {
2067                 value = fnvlist_lookup_string(nv, ZPROP_VALUE);
2068                 (void) nvlist_lookup_string(nv, ZPROP_SOURCE, source);
2069         } else {
2070                 verify(!zhp->zfs_props_table ||
2071                     zhp->zfs_props_table[prop] == B_TRUE);
2072                 value = zfs_prop_default_string(prop);
2073                 *source = "";
2074         }
2075
2076         return (value);
2077 }
2078
2079 static boolean_t
2080 zfs_is_recvd_props_mode(zfs_handle_t *zhp)
2081 {
2082         return (zhp->zfs_props == zhp->zfs_recvd_props);
2083 }
2084
2085 static void
2086 zfs_set_recvd_props_mode(zfs_handle_t *zhp, uint64_t *cookie)
2087 {
2088         *cookie = (uint64_t)(uintptr_t)zhp->zfs_props;
2089         zhp->zfs_props = zhp->zfs_recvd_props;
2090 }
2091
2092 static void
2093 zfs_unset_recvd_props_mode(zfs_handle_t *zhp, uint64_t *cookie)
2094 {
2095         zhp->zfs_props = (nvlist_t *)(uintptr_t)*cookie;
2096         *cookie = 0;
2097 }
2098
2099 /*
2100  * Internal function for getting a numeric property.  Both zfs_prop_get() and
2101  * zfs_prop_get_int() are built using this interface.
2102  *
2103  * Certain properties can be overridden using 'mount -o'.  In this case, scan
2104  * the contents of the /proc/self/mounts entry, searching for the
2105  * appropriate options. If they differ from the on-disk values, report the
2106  * current values and mark the source "temporary".
2107  */
2108 static int
2109 get_numeric_property(zfs_handle_t *zhp, zfs_prop_t prop, zprop_source_t *src,
2110     char **source, uint64_t *val)
2111 {
2112         zfs_cmd_t zc = {"\0"};
2113         nvlist_t *zplprops = NULL;
2114         struct mnttab mnt;
2115         char *mntopt_on = NULL;
2116         char *mntopt_off = NULL;
2117         boolean_t received = zfs_is_recvd_props_mode(zhp);
2118
2119         *source = NULL;
2120
2121         /*
2122          * If the property is being fetched for a snapshot, check whether
2123          * the property is valid for the snapshot's head dataset type.
2124          */
2125         if (zhp->zfs_type == ZFS_TYPE_SNAPSHOT &&
2126             !zfs_prop_valid_for_type(prop, zhp->zfs_head_type, B_TRUE)) {
2127                 *val = zfs_prop_default_numeric(prop);
2128                 return (-1);
2129         }
2130
2131         switch (prop) {
2132         case ZFS_PROP_ATIME:
2133                 mntopt_on = MNTOPT_ATIME;
2134                 mntopt_off = MNTOPT_NOATIME;
2135                 break;
2136
2137         case ZFS_PROP_RELATIME:
2138                 mntopt_on = MNTOPT_RELATIME;
2139                 mntopt_off = MNTOPT_NORELATIME;
2140                 break;
2141
2142         case ZFS_PROP_DEVICES:
2143                 mntopt_on = MNTOPT_DEVICES;
2144                 mntopt_off = MNTOPT_NODEVICES;
2145                 break;
2146
2147         case ZFS_PROP_EXEC:
2148                 mntopt_on = MNTOPT_EXEC;
2149                 mntopt_off = MNTOPT_NOEXEC;
2150                 break;
2151
2152         case ZFS_PROP_READONLY:
2153                 mntopt_on = MNTOPT_RO;
2154                 mntopt_off = MNTOPT_RW;
2155                 break;
2156
2157         case ZFS_PROP_SETUID:
2158                 mntopt_on = MNTOPT_SETUID;
2159                 mntopt_off = MNTOPT_NOSETUID;
2160                 break;
2161
2162         case ZFS_PROP_XATTR:
2163                 mntopt_on = MNTOPT_XATTR;
2164                 mntopt_off = MNTOPT_NOXATTR;
2165                 break;
2166
2167         case ZFS_PROP_NBMAND:
2168                 mntopt_on = MNTOPT_NBMAND;
2169                 mntopt_off = MNTOPT_NONBMAND;
2170                 break;
2171
2172         default:
2173                 break;
2174         }
2175
2176         /*
2177          * Because looking up the mount options is potentially expensive
2178          * (iterating over all of /proc/self/mounts), we defer its
2179          * calculation until we're looking up a property which requires
2180          * its presence.
2181          */
2182         if (!zhp->zfs_mntcheck &&
2183             (mntopt_on != NULL || prop == ZFS_PROP_MOUNTED) &&
2184             (src && (*src & ZPROP_SRC_TEMPORARY))) {
2185                 libzfs_handle_t *hdl = zhp->zfs_hdl;
2186                 struct mnttab entry;
2187
2188                 if (libzfs_mnttab_find(hdl, zhp->zfs_name, &entry) == 0) {
2189                         zhp->zfs_mntopts = zfs_strdup(hdl,
2190                             entry.mnt_mntopts);
2191                         if (zhp->zfs_mntopts == NULL)
2192                                 return (-1);
2193                 }
2194
2195                 zhp->zfs_mntcheck = B_TRUE;
2196         }
2197
2198         if (zhp->zfs_mntopts == NULL)
2199                 mnt.mnt_mntopts = "";
2200         else
2201                 mnt.mnt_mntopts = zhp->zfs_mntopts;
2202
2203         switch (prop) {
2204         case ZFS_PROP_ATIME:
2205         case ZFS_PROP_RELATIME:
2206         case ZFS_PROP_DEVICES:
2207         case ZFS_PROP_EXEC:
2208         case ZFS_PROP_READONLY:
2209         case ZFS_PROP_SETUID:
2210 #ifndef __FreeBSD__
2211         case ZFS_PROP_XATTR:
2212 #endif
2213         case ZFS_PROP_NBMAND:
2214                 *val = getprop_uint64(zhp, prop, source);
2215
2216                 if (received)
2217                         break;
2218
2219                 if (hasmntopt(&mnt, mntopt_on) && !*val) {
2220                         *val = B_TRUE;
2221                         if (src)
2222                                 *src = ZPROP_SRC_TEMPORARY;
2223                 } else if (hasmntopt(&mnt, mntopt_off) && *val) {
2224                         *val = B_FALSE;
2225                         if (src)
2226                                 *src = ZPROP_SRC_TEMPORARY;
2227                 }
2228                 break;
2229
2230         case ZFS_PROP_CANMOUNT:
2231         case ZFS_PROP_VOLSIZE:
2232         case ZFS_PROP_QUOTA:
2233         case ZFS_PROP_REFQUOTA:
2234         case ZFS_PROP_RESERVATION:
2235         case ZFS_PROP_REFRESERVATION:
2236         case ZFS_PROP_FILESYSTEM_LIMIT:
2237         case ZFS_PROP_SNAPSHOT_LIMIT:
2238         case ZFS_PROP_FILESYSTEM_COUNT:
2239         case ZFS_PROP_SNAPSHOT_COUNT:
2240                 *val = getprop_uint64(zhp, prop, source);
2241
2242                 if (*source == NULL) {
2243                         /* not default, must be local */
2244                         *source = zhp->zfs_name;
2245                 }
2246                 break;
2247
2248         case ZFS_PROP_MOUNTED:
2249                 *val = (zhp->zfs_mntopts != NULL);
2250                 break;
2251
2252         case ZFS_PROP_NUMCLONES:
2253                 *val = zhp->zfs_dmustats.dds_num_clones;
2254                 break;
2255
2256         case ZFS_PROP_VERSION:
2257         case ZFS_PROP_NORMALIZE:
2258         case ZFS_PROP_UTF8ONLY:
2259         case ZFS_PROP_CASE:
2260                 if (zcmd_alloc_dst_nvlist(zhp->zfs_hdl, &zc, 0) != 0)
2261                         return (-1);
2262                 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
2263                 if (zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_OBJSET_ZPLPROPS, &zc)) {
2264                         zcmd_free_nvlists(&zc);
2265                         if (prop == ZFS_PROP_VERSION &&
2266                             zhp->zfs_type == ZFS_TYPE_VOLUME)
2267                                 *val = zfs_prop_default_numeric(prop);
2268                         return (-1);
2269                 }
2270                 if (zcmd_read_dst_nvlist(zhp->zfs_hdl, &zc, &zplprops) != 0 ||
2271                     nvlist_lookup_uint64(zplprops, zfs_prop_to_name(prop),
2272                     val) != 0) {
2273                         zcmd_free_nvlists(&zc);
2274                         return (-1);
2275                 }
2276                 nvlist_free(zplprops);
2277                 zcmd_free_nvlists(&zc);
2278                 break;
2279
2280         case ZFS_PROP_INCONSISTENT:
2281                 *val = zhp->zfs_dmustats.dds_inconsistent;
2282                 break;
2283
2284         case ZFS_PROP_REDACTED:
2285                 *val = zhp->zfs_dmustats.dds_redacted;
2286                 break;
2287
2288         default:
2289                 switch (zfs_prop_get_type(prop)) {
2290                 case PROP_TYPE_NUMBER:
2291                 case PROP_TYPE_INDEX:
2292                         *val = getprop_uint64(zhp, prop, source);
2293                         /*
2294                          * If we tried to use a default value for a
2295                          * readonly property, it means that it was not
2296                          * present.  Note this only applies to "truly"
2297                          * readonly properties, not set-once properties
2298                          * like volblocksize.
2299                          */
2300                         if (zfs_prop_readonly(prop) &&
2301                             !zfs_prop_setonce(prop) &&
2302                             *source != NULL && (*source)[0] == '\0') {
2303                                 *source = NULL;
2304                                 return (-1);
2305                         }
2306                         break;
2307
2308                 case PROP_TYPE_STRING:
2309                 default:
2310                         zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN,
2311                             "cannot get non-numeric property"));
2312                         return (zfs_error(zhp->zfs_hdl, EZFS_BADPROP,
2313                             dgettext(TEXT_DOMAIN, "internal error")));
2314                 }
2315         }
2316
2317         return (0);
2318 }
2319
2320 /*
2321  * Calculate the source type, given the raw source string.
2322  */
2323 static void
2324 get_source(zfs_handle_t *zhp, zprop_source_t *srctype, char *source,
2325     char *statbuf, size_t statlen)
2326 {
2327         if (statbuf == NULL ||
2328             srctype == NULL || *srctype == ZPROP_SRC_TEMPORARY) {
2329                 return;
2330         }
2331
2332         if (source == NULL) {
2333                 *srctype = ZPROP_SRC_NONE;
2334         } else if (source[0] == '\0') {
2335                 *srctype = ZPROP_SRC_DEFAULT;
2336         } else if (strstr(source, ZPROP_SOURCE_VAL_RECVD) != NULL) {
2337                 *srctype = ZPROP_SRC_RECEIVED;
2338         } else {
2339                 if (strcmp(source, zhp->zfs_name) == 0) {
2340                         *srctype = ZPROP_SRC_LOCAL;
2341                 } else {
2342                         (void) strlcpy(statbuf, source, statlen);
2343                         *srctype = ZPROP_SRC_INHERITED;
2344                 }
2345         }
2346
2347 }
2348
2349 int
2350 zfs_prop_get_recvd(zfs_handle_t *zhp, const char *propname, char *propbuf,
2351     size_t proplen, boolean_t literal)
2352 {
2353         zfs_prop_t prop;
2354         int err = 0;
2355
2356         if (zhp->zfs_recvd_props == NULL)
2357                 if (get_recvd_props_ioctl(zhp) != 0)
2358                         return (-1);
2359
2360         prop = zfs_name_to_prop(propname);
2361
2362         if (prop != ZPROP_INVAL) {
2363                 uint64_t cookie;
2364                 if (!nvlist_exists(zhp->zfs_recvd_props, propname))
2365                         return (-1);
2366                 zfs_set_recvd_props_mode(zhp, &cookie);
2367                 err = zfs_prop_get(zhp, prop, propbuf, proplen,
2368                     NULL, NULL, 0, literal);
2369                 zfs_unset_recvd_props_mode(zhp, &cookie);
2370         } else {
2371                 nvlist_t *propval;
2372                 char *recvdval;
2373                 if (nvlist_lookup_nvlist(zhp->zfs_recvd_props,
2374                     propname, &propval) != 0)
2375                         return (-1);
2376                 verify(nvlist_lookup_string(propval, ZPROP_VALUE,
2377                     &recvdval) == 0);
2378                 (void) strlcpy(propbuf, recvdval, proplen);
2379         }
2380
2381         return (err == 0 ? 0 : -1);
2382 }
2383
2384 static int
2385 get_clones_string(zfs_handle_t *zhp, char *propbuf, size_t proplen)
2386 {
2387         nvlist_t *value;
2388         nvpair_t *pair;
2389
2390         value = zfs_get_clones_nvl(zhp);
2391         if (value == NULL || nvlist_empty(value))
2392                 return (-1);
2393
2394         propbuf[0] = '\0';
2395         for (pair = nvlist_next_nvpair(value, NULL); pair != NULL;
2396             pair = nvlist_next_nvpair(value, pair)) {
2397                 if (propbuf[0] != '\0')
2398                         (void) strlcat(propbuf, ",", proplen);
2399                 (void) strlcat(propbuf, nvpair_name(pair), proplen);
2400         }
2401
2402         return (0);
2403 }
2404
2405 struct get_clones_arg {
2406         uint64_t numclones;
2407         nvlist_t *value;
2408         const char *origin;
2409         char buf[ZFS_MAX_DATASET_NAME_LEN];
2410 };
2411
2412 static int
2413 get_clones_cb(zfs_handle_t *zhp, void *arg)
2414 {
2415         struct get_clones_arg *gca = arg;
2416
2417         if (gca->numclones == 0) {
2418                 zfs_close(zhp);
2419                 return (0);
2420         }
2421
2422         if (zfs_prop_get(zhp, ZFS_PROP_ORIGIN, gca->buf, sizeof (gca->buf),
2423             NULL, NULL, 0, B_TRUE) != 0)
2424                 goto out;
2425         if (strcmp(gca->buf, gca->origin) == 0) {
2426                 fnvlist_add_boolean(gca->value, zfs_get_name(zhp));
2427                 gca->numclones--;
2428         }
2429
2430 out:
2431         (void) zfs_iter_children(zhp, get_clones_cb, gca);
2432         zfs_close(zhp);
2433         return (0);
2434 }
2435
2436 nvlist_t *
2437 zfs_get_clones_nvl(zfs_handle_t *zhp)
2438 {
2439         nvlist_t *nv, *value;
2440
2441         if (nvlist_lookup_nvlist(zhp->zfs_props,
2442             zfs_prop_to_name(ZFS_PROP_CLONES), &nv) != 0) {
2443                 struct get_clones_arg gca;
2444
2445                 /*
2446                  * if this is a snapshot, then the kernel wasn't able
2447                  * to get the clones.  Do it by slowly iterating.
2448                  */
2449                 if (zhp->zfs_type != ZFS_TYPE_SNAPSHOT)
2450                         return (NULL);
2451                 if (nvlist_alloc(&nv, NV_UNIQUE_NAME, 0) != 0)
2452                         return (NULL);
2453                 if (nvlist_alloc(&value, NV_UNIQUE_NAME, 0) != 0) {
2454                         nvlist_free(nv);
2455                         return (NULL);
2456                 }
2457
2458                 gca.numclones = zfs_prop_get_int(zhp, ZFS_PROP_NUMCLONES);
2459                 gca.value = value;
2460                 gca.origin = zhp->zfs_name;
2461
2462                 if (gca.numclones != 0) {
2463                         zfs_handle_t *root;
2464                         char pool[ZFS_MAX_DATASET_NAME_LEN];
2465                         char *cp = pool;
2466
2467                         /* get the pool name */
2468                         (void) strlcpy(pool, zhp->zfs_name, sizeof (pool));
2469                         (void) strsep(&cp, "/@");
2470                         root = zfs_open(zhp->zfs_hdl, pool,
2471                             ZFS_TYPE_FILESYSTEM);
2472                         if (root == NULL) {
2473                                 nvlist_free(nv);
2474                                 nvlist_free(value);
2475                                 return (NULL);
2476                         }
2477
2478                         (void) get_clones_cb(root, &gca);
2479                 }
2480
2481                 if (gca.numclones != 0 ||
2482                     nvlist_add_nvlist(nv, ZPROP_VALUE, value) != 0 ||
2483                     nvlist_add_nvlist(zhp->zfs_props,
2484                     zfs_prop_to_name(ZFS_PROP_CLONES), nv) != 0) {
2485                         nvlist_free(nv);
2486                         nvlist_free(value);
2487                         return (NULL);
2488                 }
2489                 nvlist_free(nv);
2490                 nvlist_free(value);
2491                 verify(0 == nvlist_lookup_nvlist(zhp->zfs_props,
2492                     zfs_prop_to_name(ZFS_PROP_CLONES), &nv));
2493         }
2494
2495         verify(nvlist_lookup_nvlist(nv, ZPROP_VALUE, &value) == 0);
2496
2497         return (value);
2498 }
2499
2500 static int
2501 get_rsnaps_string(zfs_handle_t *zhp, char *propbuf, size_t proplen)
2502 {
2503         nvlist_t *value;
2504         uint64_t *snaps;
2505         uint_t nsnaps;
2506
2507         if (nvlist_lookup_nvlist(zhp->zfs_props,
2508             zfs_prop_to_name(ZFS_PROP_REDACT_SNAPS), &value) != 0)
2509                 return (-1);
2510         if (nvlist_lookup_uint64_array(value, ZPROP_VALUE, &snaps,
2511             &nsnaps) != 0)
2512                 return (-1);
2513         if (nsnaps == 0) {
2514                 /* There's no redaction snapshots; pass a special value back */
2515                 (void) snprintf(propbuf, proplen, "none");
2516                 return (0);
2517         }
2518         propbuf[0] = '\0';
2519         for (int i = 0; i < nsnaps; i++) {
2520                 char buf[128];
2521                 if (propbuf[0] != '\0')
2522                         (void) strlcat(propbuf, ",", proplen);
2523                 (void) snprintf(buf, sizeof (buf), "%llu",
2524                     (u_longlong_t)snaps[i]);
2525                 (void) strlcat(propbuf, buf, proplen);
2526         }
2527
2528         return (0);
2529 }
2530
2531 /*
2532  * Accepts a property and value and checks that the value
2533  * matches the one found by the channel program. If they are
2534  * not equal, print both of them.
2535  */
2536 static void
2537 zcp_check(zfs_handle_t *zhp, zfs_prop_t prop, uint64_t intval,
2538     const char *strval)
2539 {
2540         if (!zhp->zfs_hdl->libzfs_prop_debug)
2541                 return;
2542         int error;
2543         char *poolname = zhp->zpool_hdl->zpool_name;
2544         const char *prop_name = zfs_prop_to_name(prop);
2545         const char *program =
2546             "args = ...\n"
2547             "ds = args['dataset']\n"
2548             "prop = args['property']\n"
2549             "value, setpoint = zfs.get_prop(ds, prop)\n"
2550             "return {value=value, setpoint=setpoint}\n";
2551         nvlist_t *outnvl;
2552         nvlist_t *retnvl;
2553         nvlist_t *argnvl = fnvlist_alloc();
2554
2555         fnvlist_add_string(argnvl, "dataset", zhp->zfs_name);
2556         fnvlist_add_string(argnvl, "property", zfs_prop_to_name(prop));
2557
2558         error = lzc_channel_program_nosync(poolname, program,
2559             10 * 1000 * 1000, 10 * 1024 * 1024, argnvl, &outnvl);
2560
2561         if (error == 0) {
2562                 retnvl = fnvlist_lookup_nvlist(outnvl, "return");
2563                 if (zfs_prop_get_type(prop) == PROP_TYPE_NUMBER) {
2564                         int64_t ans;
2565                         error = nvlist_lookup_int64(retnvl, "value", &ans);
2566                         if (error != 0) {
2567                                 (void) fprintf(stderr, "%s: zcp check error: "
2568                                     "%u\n", prop_name, error);
2569                                 return;
2570                         }
2571                         if (ans != intval) {
2572                                 (void) fprintf(stderr, "%s: zfs found %llu, "
2573                                     "but zcp found %llu\n", prop_name,
2574                                     (u_longlong_t)intval, (u_longlong_t)ans);
2575                         }
2576                 } else {
2577                         char *str_ans;
2578                         error = nvlist_lookup_string(retnvl, "value", &str_ans);
2579                         if (error != 0) {
2580                                 (void) fprintf(stderr, "%s: zcp check error: "
2581                                     "%u\n", prop_name, error);
2582                                 return;
2583                         }
2584                         if (strcmp(strval, str_ans) != 0) {
2585                                 (void) fprintf(stderr,
2586                                     "%s: zfs found '%s', but zcp found '%s'\n",
2587                                     prop_name, strval, str_ans);
2588                         }
2589                 }
2590         } else {
2591                 (void) fprintf(stderr, "%s: zcp check failed, channel program "
2592                     "error: %u\n", prop_name, error);
2593         }
2594         nvlist_free(argnvl);
2595         nvlist_free(outnvl);
2596 }
2597
2598 /*
2599  * Retrieve a property from the given object.
2600  *
2601  * Arguments:
2602  *  src :       On call, this must contain the bitmap of ZPROP_SRC_* types to
2603  *              query.  Properties whose values come from a different source
2604  *              may not be returned. NULL will be treated as ZPROP_SRC_ALL.  On
2605  *              return, if not NULL, this variable will contain the source for
2606  *              the queried property.
2607  *  literal :   If specified, then numbers are left as exact values.  Otherwise,
2608  *              they are converted to a human-readable form.
2609  *
2610  * Returns 0 on success, or -1 on error.
2611  */
2612 int
2613 zfs_prop_get(zfs_handle_t *zhp, zfs_prop_t prop, char *propbuf, size_t proplen,
2614     zprop_source_t *src, char *statbuf, size_t statlen, boolean_t literal)
2615 {
2616         char *source = NULL;
2617         uint64_t val;
2618         const char *str;
2619         const char *strval;
2620         boolean_t received = zfs_is_recvd_props_mode(zhp);
2621
2622         /*
2623          * Check to see if this property applies to our object
2624          */
2625         if (!zfs_prop_valid_for_type(prop, zhp->zfs_type, B_FALSE))
2626                 return (-1);
2627
2628         if (received && zfs_prop_readonly(prop))
2629                 return (-1);
2630
2631         switch (prop) {
2632         case ZFS_PROP_CREATION:
2633                 /*
2634                  * 'creation' is a time_t stored in the statistics.  We convert
2635                  * this into a string unless 'literal' is specified.
2636                  */
2637                 {
2638                         val = getprop_uint64(zhp, prop, &source);
2639                         time_t time = (time_t)val;
2640                         struct tm t;
2641
2642                         if (literal ||
2643                             localtime_r(&time, &t) == NULL ||
2644                             strftime(propbuf, proplen, "%a %b %e %k:%M %Y",
2645                             &t) == 0)
2646                                 (void) snprintf(propbuf, proplen, "%llu",
2647                                     (u_longlong_t)val);
2648                 }
2649                 zcp_check(zhp, prop, val, NULL);
2650                 break;
2651
2652         case ZFS_PROP_MOUNTPOINT:
2653                 /*
2654                  * Getting the precise mountpoint can be tricky.
2655                  *
2656                  *  - for 'none' or 'legacy', return those values.
2657                  *  - for inherited mountpoints, we want to take everything
2658                  *    after our ancestor and append it to the inherited value.
2659                  *
2660                  * If the pool has an alternate root, we want to prepend that
2661                  * root to any values we return.
2662                  */
2663
2664                 str = getprop_string(zhp, prop, &source);
2665
2666                 if (str[0] == '/') {
2667                         char buf[MAXPATHLEN];
2668                         char *root = buf;
2669                         const char *relpath;
2670
2671                         /*
2672                          * If we inherit the mountpoint, even from a dataset
2673                          * with a received value, the source will be the path of
2674                          * the dataset we inherit from. If source is
2675                          * ZPROP_SOURCE_VAL_RECVD, the received value is not
2676                          * inherited.
2677                          */
2678                         if (strcmp(source, ZPROP_SOURCE_VAL_RECVD) == 0) {
2679                                 relpath = "";
2680                         } else {
2681                                 relpath = zhp->zfs_name + strlen(source);
2682                                 if (relpath[0] == '/')
2683                                         relpath++;
2684                         }
2685
2686                         if ((zpool_get_prop(zhp->zpool_hdl,
2687                             ZPOOL_PROP_ALTROOT, buf, MAXPATHLEN, NULL,
2688                             B_FALSE)) || (strcmp(root, "-") == 0))
2689                                 root[0] = '\0';
2690                         /*
2691                          * Special case an alternate root of '/'. This will
2692                          * avoid having multiple leading slashes in the
2693                          * mountpoint path.
2694                          */
2695                         if (strcmp(root, "/") == 0)
2696                                 root++;
2697
2698                         /*
2699                          * If the mountpoint is '/' then skip over this
2700                          * if we are obtaining either an alternate root or
2701                          * an inherited mountpoint.
2702                          */
2703                         if (str[1] == '\0' && (root[0] != '\0' ||
2704                             relpath[0] != '\0'))
2705                                 str++;
2706
2707                         if (relpath[0] == '\0')
2708                                 (void) snprintf(propbuf, proplen, "%s%s",
2709                                     root, str);
2710                         else
2711                                 (void) snprintf(propbuf, proplen, "%s%s%s%s",
2712                                     root, str, relpath[0] == '@' ? "" : "/",
2713                                     relpath);
2714                 } else {
2715                         /* 'legacy' or 'none' */
2716                         (void) strlcpy(propbuf, str, proplen);
2717                 }
2718                 zcp_check(zhp, prop, 0, propbuf);
2719                 break;
2720
2721         case ZFS_PROP_ORIGIN:
2722                 str = getprop_string(zhp, prop, &source);
2723                 if (str == NULL)
2724                         return (-1);
2725                 (void) strlcpy(propbuf, str, proplen);
2726                 zcp_check(zhp, prop, 0, str);
2727                 break;
2728
2729         case ZFS_PROP_REDACT_SNAPS:
2730                 if (get_rsnaps_string(zhp, propbuf, proplen) != 0)
2731                         return (-1);
2732                 break;
2733
2734         case ZFS_PROP_CLONES:
2735                 if (get_clones_string(zhp, propbuf, proplen) != 0)
2736                         return (-1);
2737                 break;
2738
2739         case ZFS_PROP_QUOTA:
2740         case ZFS_PROP_REFQUOTA:
2741         case ZFS_PROP_RESERVATION:
2742         case ZFS_PROP_REFRESERVATION:
2743
2744                 if (get_numeric_property(zhp, prop, src, &source, &val) != 0)
2745                         return (-1);
2746                 /*
2747                  * If quota or reservation is 0, we translate this into 'none'
2748                  * (unless literal is set), and indicate that it's the default
2749                  * value.  Otherwise, we print the number nicely and indicate
2750                  * that its set locally.
2751                  */
2752                 if (val == 0) {
2753                         if (literal)
2754                                 (void) strlcpy(propbuf, "0", proplen);
2755                         else
2756                                 (void) strlcpy(propbuf, "none", proplen);
2757                 } else {
2758                         if (literal)
2759                                 (void) snprintf(propbuf, proplen, "%llu",
2760                                     (u_longlong_t)val);
2761                         else
2762                                 zfs_nicebytes(val, propbuf, proplen);
2763                 }
2764                 zcp_check(zhp, prop, val, NULL);
2765                 break;
2766
2767         case ZFS_PROP_FILESYSTEM_LIMIT:
2768         case ZFS_PROP_SNAPSHOT_LIMIT:
2769         case ZFS_PROP_FILESYSTEM_COUNT:
2770         case ZFS_PROP_SNAPSHOT_COUNT:
2771
2772                 if (get_numeric_property(zhp, prop, src, &source, &val) != 0)
2773                         return (-1);
2774
2775                 /*
2776                  * If limit is UINT64_MAX, we translate this into 'none' (unless
2777                  * literal is set), and indicate that it's the default value.
2778                  * Otherwise, we print the number nicely and indicate that it's
2779                  * set locally.
2780                  */
2781                 if (literal) {
2782                         (void) snprintf(propbuf, proplen, "%llu",
2783                             (u_longlong_t)val);
2784                 } else if (val == UINT64_MAX) {
2785                         (void) strlcpy(propbuf, "none", proplen);
2786                 } else {
2787                         zfs_nicenum(val, propbuf, proplen);
2788                 }
2789
2790                 zcp_check(zhp, prop, val, NULL);
2791                 break;
2792
2793         case ZFS_PROP_REFRATIO:
2794         case ZFS_PROP_COMPRESSRATIO:
2795                 if (get_numeric_property(zhp, prop, src, &source, &val) != 0)
2796                         return (-1);
2797                 if (literal)
2798                         (void) snprintf(propbuf, proplen, "%llu.%02llu",
2799                             (u_longlong_t)(val / 100),
2800                             (u_longlong_t)(val % 100));
2801                 else
2802                         (void) snprintf(propbuf, proplen, "%llu.%02llux",
2803                             (u_longlong_t)(val / 100),
2804                             (u_longlong_t)(val % 100));
2805                 zcp_check(zhp, prop, val, NULL);
2806                 break;
2807
2808         case ZFS_PROP_TYPE:
2809                 switch (zhp->zfs_type) {
2810                 case ZFS_TYPE_FILESYSTEM:
2811                         str = "filesystem";
2812                         break;
2813                 case ZFS_TYPE_VOLUME:
2814                         str = "volume";
2815                         break;
2816                 case ZFS_TYPE_SNAPSHOT:
2817                         str = "snapshot";
2818                         break;
2819                 case ZFS_TYPE_BOOKMARK:
2820                         str = "bookmark";
2821                         break;
2822                 default:
2823                         abort();
2824                 }
2825                 (void) snprintf(propbuf, proplen, "%s", str);
2826                 zcp_check(zhp, prop, 0, propbuf);
2827                 break;
2828
2829         case ZFS_PROP_MOUNTED:
2830                 /*
2831                  * The 'mounted' property is a pseudo-property that described
2832                  * whether the filesystem is currently mounted.  Even though
2833                  * it's a boolean value, the typical values of "on" and "off"
2834                  * don't make sense, so we translate to "yes" and "no".
2835                  */
2836                 if (get_numeric_property(zhp, ZFS_PROP_MOUNTED,
2837                     src, &source, &val) != 0)
2838                         return (-1);
2839                 if (val)
2840                         (void) strlcpy(propbuf, "yes", proplen);
2841                 else
2842                         (void) strlcpy(propbuf, "no", proplen);
2843                 break;
2844
2845         case ZFS_PROP_NAME:
2846                 /*
2847                  * The 'name' property is a pseudo-property derived from the
2848                  * dataset name.  It is presented as a real property to simplify
2849                  * consumers.
2850                  */
2851                 (void) strlcpy(propbuf, zhp->zfs_name, proplen);
2852                 zcp_check(zhp, prop, 0, propbuf);
2853                 break;
2854
2855         case ZFS_PROP_MLSLABEL:
2856                 {
2857 #ifdef HAVE_MLSLABEL
2858                         m_label_t *new_sl = NULL;
2859                         char *ascii = NULL;     /* human readable label */
2860
2861                         (void) strlcpy(propbuf,
2862                             getprop_string(zhp, prop, &source), proplen);
2863
2864                         if (literal || (strcasecmp(propbuf,
2865                             ZFS_MLSLABEL_DEFAULT) == 0))
2866                                 break;
2867
2868                         /*
2869                          * Try to translate the internal hex string to
2870                          * human-readable output.  If there are any
2871                          * problems just use the hex string.
2872                          */
2873
2874                         if (str_to_label(propbuf, &new_sl, MAC_LABEL,
2875                             L_NO_CORRECTION, NULL) == -1) {
2876                                 m_label_free(new_sl);
2877                                 break;
2878                         }
2879
2880                         if (label_to_str(new_sl, &ascii, M_LABEL,
2881                             DEF_NAMES) != 0) {
2882                                 if (ascii)
2883                                         free(ascii);
2884                                 m_label_free(new_sl);
2885                                 break;
2886                         }
2887                         m_label_free(new_sl);
2888
2889                         (void) strlcpy(propbuf, ascii, proplen);
2890                         free(ascii);
2891 #else
2892                         (void) strlcpy(propbuf,
2893                             getprop_string(zhp, prop, &source), proplen);
2894 #endif /* HAVE_MLSLABEL */
2895                 }
2896                 break;
2897
2898         case ZFS_PROP_GUID:
2899         case ZFS_PROP_CREATETXG:
2900         case ZFS_PROP_OBJSETID:
2901         case ZFS_PROP_PBKDF2_ITERS:
2902                 /*
2903                  * These properties are stored as numbers, but they are
2904                  * identifiers or counters.
2905                  * We don't want them to be pretty printed, because pretty
2906                  * printing truncates their values making them useless.
2907                  */
2908                 if (get_numeric_property(zhp, prop, src, &source, &val) != 0)
2909                         return (-1);
2910                 (void) snprintf(propbuf, proplen, "%llu", (u_longlong_t)val);
2911                 zcp_check(zhp, prop, val, NULL);
2912                 break;
2913
2914         case ZFS_PROP_REFERENCED:
2915         case ZFS_PROP_AVAILABLE:
2916         case ZFS_PROP_USED:
2917         case ZFS_PROP_USEDSNAP:
2918         case ZFS_PROP_USEDDS:
2919         case ZFS_PROP_USEDREFRESERV:
2920         case ZFS_PROP_USEDCHILD:
2921                 if (get_numeric_property(zhp, prop, src, &source, &val) != 0)
2922                         return (-1);
2923                 if (literal) {
2924                         (void) snprintf(propbuf, proplen, "%llu",
2925                             (u_longlong_t)val);
2926                 } else {
2927                         zfs_nicebytes(val, propbuf, proplen);
2928                 }
2929                 zcp_check(zhp, prop, val, NULL);
2930                 break;
2931
2932         default:
2933                 switch (zfs_prop_get_type(prop)) {
2934                 case PROP_TYPE_NUMBER:
2935                         if (get_numeric_property(zhp, prop, src,
2936                             &source, &val) != 0) {
2937                                 return (-1);
2938                         }
2939
2940                         if (literal) {
2941                                 (void) snprintf(propbuf, proplen, "%llu",
2942                                     (u_longlong_t)val);
2943                         } else {
2944                                 zfs_nicenum(val, propbuf, proplen);
2945                         }
2946                         zcp_check(zhp, prop, val, NULL);
2947                         break;
2948
2949                 case PROP_TYPE_STRING:
2950                         str = getprop_string(zhp, prop, &source);
2951                         if (str == NULL)
2952                                 return (-1);
2953
2954                         (void) strlcpy(propbuf, str, proplen);
2955                         zcp_check(zhp, prop, 0, str);
2956                         break;
2957
2958                 case PROP_TYPE_INDEX:
2959                         if (get_numeric_property(zhp, prop, src,
2960                             &source, &val) != 0)
2961                                 return (-1);
2962                         if (zfs_prop_index_to_string(prop, val, &strval) != 0)
2963                                 return (-1);
2964
2965                         (void) strlcpy(propbuf, strval, proplen);
2966                         zcp_check(zhp, prop, 0, strval);
2967                         break;
2968
2969                 default:
2970                         abort();
2971                 }
2972         }
2973
2974         get_source(zhp, src, source, statbuf, statlen);
2975
2976         return (0);
2977 }
2978
2979 /*
2980  * Utility function to get the given numeric property.  Does no validation that
2981  * the given property is the appropriate type; should only be used with
2982  * hard-coded property types.
2983  */
2984 uint64_t
2985 zfs_prop_get_int(zfs_handle_t *zhp, zfs_prop_t prop)
2986 {
2987         char *source;
2988         uint64_t val = 0;
2989
2990         (void) get_numeric_property(zhp, prop, NULL, &source, &val);
2991
2992         return (val);
2993 }
2994
2995 static int
2996 zfs_prop_set_int(zfs_handle_t *zhp, zfs_prop_t prop, uint64_t val)
2997 {
2998         char buf[64];
2999
3000         (void) snprintf(buf, sizeof (buf), "%llu", (longlong_t)val);
3001         return (zfs_prop_set(zhp, zfs_prop_to_name(prop), buf));
3002 }
3003
3004 /*
3005  * Similar to zfs_prop_get(), but returns the value as an integer.
3006  */
3007 int
3008 zfs_prop_get_numeric(zfs_handle_t *zhp, zfs_prop_t prop, uint64_t *value,
3009     zprop_source_t *src, char *statbuf, size_t statlen)
3010 {
3011         char *source;
3012
3013         /*
3014          * Check to see if this property applies to our object
3015          */
3016         if (!zfs_prop_valid_for_type(prop, zhp->zfs_type, B_FALSE)) {
3017                 return (zfs_error_fmt(zhp->zfs_hdl, EZFS_PROPTYPE,
3018                     dgettext(TEXT_DOMAIN, "cannot get property '%s'"),
3019                     zfs_prop_to_name(prop)));
3020         }
3021
3022         if (src)
3023                 *src = ZPROP_SRC_NONE;
3024
3025         if (get_numeric_property(zhp, prop, src, &source, value) != 0)
3026                 return (-1);
3027
3028         get_source(zhp, src, source, statbuf, statlen);
3029
3030         return (0);
3031 }
3032
3033 #ifdef HAVE_IDMAP
3034 static int
3035 idmap_id_to_numeric_domain_rid(uid_t id, boolean_t isuser,
3036     char **domainp, idmap_rid_t *ridp)
3037 {
3038         idmap_get_handle_t *get_hdl = NULL;
3039         idmap_stat status;
3040         int err = EINVAL;
3041
3042         if (idmap_get_create(&get_hdl) != IDMAP_SUCCESS)
3043                 goto out;
3044
3045         if (isuser) {
3046                 err = idmap_get_sidbyuid(get_hdl, id,
3047                     IDMAP_REQ_FLG_USE_CACHE, domainp, ridp, &status);
3048         } else {
3049                 err = idmap_get_sidbygid(get_hdl, id,
3050                     IDMAP_REQ_FLG_USE_CACHE, domainp, ridp, &status);
3051         }
3052         if (err == IDMAP_SUCCESS &&
3053             idmap_get_mappings(get_hdl) == IDMAP_SUCCESS &&
3054             status == IDMAP_SUCCESS)
3055                 err = 0;
3056         else
3057                 err = EINVAL;
3058 out:
3059         if (get_hdl)
3060                 idmap_get_destroy(get_hdl);
3061         return (err);
3062 }
3063 #endif /* HAVE_IDMAP */
3064
3065 /*
3066  * convert the propname into parameters needed by kernel
3067  * Eg: userquota@ahrens -> ZFS_PROP_USERQUOTA, "", 126829
3068  * Eg: userused@matt@domain -> ZFS_PROP_USERUSED, "S-1-123-456", 789
3069  * Eg: groupquota@staff -> ZFS_PROP_GROUPQUOTA, "", 1234
3070  * Eg: groupused@staff -> ZFS_PROP_GROUPUSED, "", 1234
3071  * Eg: projectquota@123 -> ZFS_PROP_PROJECTQUOTA, "", 123
3072  * Eg: projectused@789 -> ZFS_PROP_PROJECTUSED, "", 789
3073  */
3074 static int
3075 userquota_propname_decode(const char *propname, boolean_t zoned,
3076     zfs_userquota_prop_t *typep, char *domain, int domainlen, uint64_t *ridp)
3077 {
3078         zfs_userquota_prop_t type;
3079         char *cp;
3080         boolean_t isuser;
3081         boolean_t isgroup;
3082         boolean_t isproject;
3083         struct passwd *pw;
3084         struct group *gr;
3085
3086         domain[0] = '\0';
3087
3088         /* Figure out the property type ({user|group|project}{quota|space}) */
3089         for (type = 0; type < ZFS_NUM_USERQUOTA_PROPS; type++) {
3090                 if (strncmp(propname, zfs_userquota_prop_prefixes[type],
3091                     strlen(zfs_userquota_prop_prefixes[type])) == 0)
3092                         break;
3093         }
3094         if (type == ZFS_NUM_USERQUOTA_PROPS)
3095                 return (EINVAL);
3096         *typep = type;
3097
3098         isuser = (type == ZFS_PROP_USERQUOTA || type == ZFS_PROP_USERUSED ||
3099             type == ZFS_PROP_USEROBJQUOTA ||
3100             type == ZFS_PROP_USEROBJUSED);
3101         isgroup = (type == ZFS_PROP_GROUPQUOTA || type == ZFS_PROP_GROUPUSED ||
3102             type == ZFS_PROP_GROUPOBJQUOTA ||
3103             type == ZFS_PROP_GROUPOBJUSED);
3104         isproject = (type == ZFS_PROP_PROJECTQUOTA ||
3105             type == ZFS_PROP_PROJECTUSED || type == ZFS_PROP_PROJECTOBJQUOTA ||
3106             type == ZFS_PROP_PROJECTOBJUSED);
3107
3108         cp = strchr(propname, '@') + 1;
3109
3110         if (isuser && (pw = getpwnam(cp)) != NULL) {
3111                 if (zoned && getzoneid() == GLOBAL_ZONEID)
3112                         return (ENOENT);
3113                 *ridp = pw->pw_uid;
3114         } else if (isgroup && (gr = getgrnam(cp)) != NULL) {
3115                 if (zoned && getzoneid() == GLOBAL_ZONEID)
3116                         return (ENOENT);
3117                 *ridp = gr->gr_gid;
3118         } else if (!isproject && strchr(cp, '@')) {
3119 #ifdef HAVE_IDMAP
3120                 /*
3121                  * It's a SID name (eg "user@domain") that needs to be
3122                  * turned into S-1-domainID-RID.
3123                  */
3124                 directory_error_t e;
3125                 char *numericsid = NULL;
3126                 char *end;
3127
3128                 if (zoned && getzoneid() == GLOBAL_ZONEID)
3129                         return (ENOENT);
3130                 if (isuser) {
3131                         e = directory_sid_from_user_name(NULL,
3132                             cp, &numericsid);
3133                 } else {
3134                         e = directory_sid_from_group_name(NULL,
3135                             cp, &numericsid);
3136                 }
3137                 if (e != NULL) {
3138                         directory_error_free(e);
3139                         return (ENOENT);
3140                 }
3141                 if (numericsid == NULL)
3142                         return (ENOENT);
3143                 cp = numericsid;
3144                 (void) strlcpy(domain, cp, domainlen);
3145                 cp = strrchr(domain, '-');
3146                 *cp = '\0';
3147                 cp++;
3148
3149                 errno = 0;
3150                 *ridp = strtoull(cp, &end, 10);
3151                 free(numericsid);
3152
3153                 if (errno != 0 || *end != '\0')
3154                         return (EINVAL);
3155 #else
3156                 return (ENOSYS);
3157 #endif /* HAVE_IDMAP */
3158         } else {
3159                 /* It's a user/group/project ID (eg "12345"). */
3160                 uid_t id;
3161                 char *end;
3162                 id = strtoul(cp, &end, 10);
3163                 if (*end != '\0')
3164                         return (EINVAL);
3165                 if (id > MAXUID && !isproject) {
3166 #ifdef HAVE_IDMAP
3167                         /* It's an ephemeral ID. */
3168                         idmap_rid_t rid;
3169                         char *mapdomain;
3170
3171                         if (idmap_id_to_numeric_domain_rid(id, isuser,
3172                             &mapdomain, &rid) != 0)
3173                                 return (ENOENT);
3174                         (void) strlcpy(domain, mapdomain, domainlen);
3175                         *ridp = rid;
3176 #else
3177                         return (ENOSYS);
3178 #endif /* HAVE_IDMAP */
3179                 } else {
3180                         *ridp = id;
3181                 }
3182         }
3183
3184         return (0);
3185 }
3186
3187 static int
3188 zfs_prop_get_userquota_common(zfs_handle_t *zhp, const char *propname,
3189     uint64_t *propvalue, zfs_userquota_prop_t *typep)
3190 {
3191         int err;
3192         zfs_cmd_t zc = {"\0"};
3193
3194         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
3195
3196         err = userquota_propname_decode(propname,
3197             zfs_prop_get_int(zhp, ZFS_PROP_ZONED),
3198             typep, zc.zc_value, sizeof (zc.zc_value), &zc.zc_guid);
3199         zc.zc_objset_type = *typep;
3200         if (err)
3201                 return (err);
3202
3203         err = zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_USERSPACE_ONE, &zc);
3204         if (err)
3205                 return (err);
3206
3207         *propvalue = zc.zc_cookie;
3208         return (0);
3209 }
3210
3211 int
3212 zfs_prop_get_userquota_int(zfs_handle_t *zhp, const char *propname,
3213     uint64_t *propvalue)
3214 {
3215         zfs_userquota_prop_t type;
3216
3217         return (zfs_prop_get_userquota_common(zhp, propname, propvalue,
3218             &type));
3219 }
3220
3221 int
3222 zfs_prop_get_userquota(zfs_handle_t *zhp, const char *propname,
3223     char *propbuf, int proplen, boolean_t literal)
3224 {
3225         int err;
3226         uint64_t propvalue;
3227         zfs_userquota_prop_t type;
3228
3229         err = zfs_prop_get_userquota_common(zhp, propname, &propvalue,
3230             &type);
3231
3232         if (err)
3233                 return (err);
3234
3235         if (literal) {
3236                 (void) snprintf(propbuf, proplen, "%llu",
3237                     (u_longlong_t)propvalue);
3238         } else if (propvalue == 0 &&
3239             (type == ZFS_PROP_USERQUOTA || type == ZFS_PROP_GROUPQUOTA ||
3240             type == ZFS_PROP_USEROBJQUOTA || type == ZFS_PROP_GROUPOBJQUOTA ||
3241             type == ZFS_PROP_PROJECTQUOTA ||
3242             type == ZFS_PROP_PROJECTOBJQUOTA)) {
3243                 (void) strlcpy(propbuf, "none", proplen);
3244         } else if (type == ZFS_PROP_USERQUOTA || type == ZFS_PROP_GROUPQUOTA ||
3245             type == ZFS_PROP_USERUSED || type == ZFS_PROP_GROUPUSED ||
3246             type == ZFS_PROP_PROJECTUSED || type == ZFS_PROP_PROJECTQUOTA) {
3247                 zfs_nicebytes(propvalue, propbuf, proplen);
3248         } else {
3249                 zfs_nicenum(propvalue, propbuf, proplen);
3250         }
3251         return (0);
3252 }
3253
3254 /*
3255  * propname must start with "written@" or "written#".
3256  */
3257 int
3258 zfs_prop_get_written_int(zfs_handle_t *zhp, const char *propname,
3259     uint64_t *propvalue)
3260 {
3261         int err;
3262         zfs_cmd_t zc = {"\0"};
3263         const char *snapname;
3264
3265         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
3266
3267         assert(zfs_prop_written(propname));
3268         snapname = propname + strlen("written@");
3269         if (strchr(snapname, '@') != NULL || strchr(snapname, '#') != NULL) {
3270                 /* full snapshot or bookmark name specified */
3271                 (void) strlcpy(zc.zc_value, snapname, sizeof (zc.zc_value));
3272         } else {
3273                 /* snapname is the short name, append it to zhp's fsname */
3274                 char *cp;
3275
3276                 (void) strlcpy(zc.zc_value, zhp->zfs_name,
3277                     sizeof (zc.zc_value));
3278                 cp = strchr(zc.zc_value, '@');
3279                 if (cp != NULL)
3280                         *cp = '\0';
3281                 (void) strlcat(zc.zc_value, snapname - 1, sizeof (zc.zc_value));
3282         }
3283
3284         err = zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_SPACE_WRITTEN, &zc);
3285         if (err)
3286                 return (err);
3287
3288         *propvalue = zc.zc_cookie;
3289         return (0);
3290 }
3291
3292 int
3293 zfs_prop_get_written(zfs_handle_t *zhp, const char *propname,
3294     char *propbuf, int proplen, boolean_t literal)
3295 {
3296         int err;
3297         uint64_t propvalue;
3298
3299         err = zfs_prop_get_written_int(zhp, propname, &propvalue);
3300
3301         if (err)
3302                 return (err);
3303
3304         if (literal) {
3305                 (void) snprintf(propbuf, proplen, "%llu",
3306                     (u_longlong_t)propvalue);
3307         } else {
3308                 zfs_nicebytes(propvalue, propbuf, proplen);
3309         }
3310
3311         return (0);
3312 }
3313
3314 /*
3315  * Returns the name of the given zfs handle.
3316  */
3317 const char *
3318 zfs_get_name(const zfs_handle_t *zhp)
3319 {
3320         return (zhp->zfs_name);
3321 }
3322
3323 /*
3324  * Returns the name of the parent pool for the given zfs handle.
3325  */
3326 const char *
3327 zfs_get_pool_name(const zfs_handle_t *zhp)
3328 {
3329         return (zhp->zpool_hdl->zpool_name);
3330 }
3331
3332 /*
3333  * Returns the type of the given zfs handle.
3334  */
3335 zfs_type_t
3336 zfs_get_type(const zfs_handle_t *zhp)
3337 {
3338         return (zhp->zfs_type);
3339 }
3340
3341 /*
3342  * Is one dataset name a child dataset of another?
3343  *
3344  * Needs to handle these cases:
3345  * Dataset 1    "a/foo"         "a/foo"         "a/foo"         "a/foo"
3346  * Dataset 2    "a/fo"          "a/foobar"      "a/bar/baz"     "a/foo/bar"
3347  * Descendant?  No.             No.             No.             Yes.
3348  */
3349 static boolean_t
3350 is_descendant(const char *ds1, const char *ds2)
3351 {
3352         size_t d1len = strlen(ds1);
3353
3354         /* ds2 can't be a descendant if it's smaller */
3355         if (strlen(ds2) < d1len)
3356                 return (B_FALSE);
3357
3358         /* otherwise, compare strings and verify that there's a '/' char */
3359         return (ds2[d1len] == '/' && (strncmp(ds1, ds2, d1len) == 0));
3360 }
3361
3362 /*
3363  * Given a complete name, return just the portion that refers to the parent.
3364  * Will return -1 if there is no parent (path is just the name of the
3365  * pool).
3366  */
3367 static int
3368 parent_name(const char *path, char *buf, size_t buflen)
3369 {
3370         char *slashp;
3371
3372         (void) strlcpy(buf, path, buflen);
3373
3374         if ((slashp = strrchr(buf, '/')) == NULL)
3375                 return (-1);
3376         *slashp = '\0';
3377
3378         return (0);
3379 }
3380
3381 int
3382 zfs_parent_name(zfs_handle_t *zhp, char *buf, size_t buflen)
3383 {
3384         return (parent_name(zfs_get_name(zhp), buf, buflen));
3385 }
3386
3387 /*
3388  * If accept_ancestor is false, then check to make sure that the given path has
3389  * a parent, and that it exists.  If accept_ancestor is true, then find the
3390  * closest existing ancestor for the given path.  In prefixlen return the
3391  * length of already existing prefix of the given path.  We also fetch the
3392  * 'zoned' property, which is used to validate property settings when creating
3393  * new datasets.
3394  */
3395 static int
3396 check_parents(libzfs_handle_t *hdl, const char *path, uint64_t *zoned,
3397     boolean_t accept_ancestor, int *prefixlen)
3398 {
3399         zfs_cmd_t zc = {"\0"};
3400         char parent[ZFS_MAX_DATASET_NAME_LEN];
3401         char *slash;
3402         zfs_handle_t *zhp;
3403         char errbuf[1024];
3404         uint64_t is_zoned;
3405
3406         (void) snprintf(errbuf, sizeof (errbuf),
3407             dgettext(TEXT_DOMAIN, "cannot create '%s'"), path);
3408
3409         /* get parent, and check to see if this is just a pool */
3410         if (parent_name(path, parent, sizeof (parent)) != 0) {
3411                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3412                     "missing dataset name"));
3413                 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3414         }
3415
3416         /* check to see if the pool exists */
3417         if ((slash = strchr(parent, '/')) == NULL)
3418                 slash = parent + strlen(parent);
3419         (void) strncpy(zc.zc_name, parent, slash - parent);
3420         zc.zc_name[slash - parent] = '\0';
3421         if (zfs_ioctl(hdl, ZFS_IOC_OBJSET_STATS, &zc) != 0 &&
3422             errno == ENOENT) {
3423                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3424                     "no such pool '%s'"), zc.zc_name);
3425                 return (zfs_error(hdl, EZFS_NOENT, errbuf));
3426         }
3427
3428         /* check to see if the parent dataset exists */
3429         while ((zhp = make_dataset_handle(hdl, parent)) == NULL) {
3430                 if (errno == ENOENT && accept_ancestor) {
3431                         /*
3432                          * Go deeper to find an ancestor, give up on top level.
3433                          */
3434                         if (parent_name(parent, parent, sizeof (parent)) != 0) {
3435                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3436                                     "no such pool '%s'"), zc.zc_name);
3437                                 return (zfs_error(hdl, EZFS_NOENT, errbuf));
3438                         }
3439                 } else if (errno == ENOENT) {
3440                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3441                             "parent does not exist"));
3442                         return (zfs_error(hdl, EZFS_NOENT, errbuf));
3443                 } else
3444                         return (zfs_standard_error(hdl, errno, errbuf));
3445         }
3446
3447         is_zoned = zfs_prop_get_int(zhp, ZFS_PROP_ZONED);
3448         if (zoned != NULL)
3449                 *zoned = is_zoned;
3450
3451         /* we are in a non-global zone, but parent is in the global zone */
3452         if (getzoneid() != GLOBAL_ZONEID && !is_zoned) {
3453                 (void) zfs_standard_error(hdl, EPERM, errbuf);
3454                 zfs_close(zhp);
3455                 return (-1);
3456         }
3457
3458         /* make sure parent is a filesystem */
3459         if (zfs_get_type(zhp) != ZFS_TYPE_FILESYSTEM) {
3460                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3461                     "parent is not a filesystem"));
3462                 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf);
3463                 zfs_close(zhp);
3464                 return (-1);
3465         }
3466
3467         zfs_close(zhp);
3468         if (prefixlen != NULL)
3469                 *prefixlen = strlen(parent);
3470         return (0);
3471 }
3472
3473 /*
3474  * Finds whether the dataset of the given type(s) exists.
3475  */
3476 boolean_t
3477 zfs_dataset_exists(libzfs_handle_t *hdl, const char *path, zfs_type_t types)
3478 {
3479         zfs_handle_t *zhp;
3480
3481         if (!zfs_validate_name(hdl, path, types, B_FALSE))
3482                 return (B_FALSE);
3483
3484         /*
3485          * Try to get stats for the dataset, which will tell us if it exists.
3486          */
3487         if ((zhp = make_dataset_handle(hdl, path)) != NULL) {
3488                 int ds_type = zhp->zfs_type;
3489
3490                 zfs_close(zhp);
3491                 if (types & ds_type)
3492                         return (B_TRUE);
3493         }
3494         return (B_FALSE);
3495 }
3496
3497 /*
3498  * Given a path to 'target', create all the ancestors between
3499  * the prefixlen portion of the path, and the target itself.
3500  * Fail if the initial prefixlen-ancestor does not already exist.
3501  */
3502 int
3503 create_parents(libzfs_handle_t *hdl, char *target, int prefixlen)
3504 {
3505         zfs_handle_t *h;
3506         char *cp;
3507         const char *opname;
3508
3509         /* make sure prefix exists */
3510         cp = target + prefixlen;
3511         if (*cp != '/') {
3512                 assert(strchr(cp, '/') == NULL);
3513                 h = zfs_open(hdl, target, ZFS_TYPE_FILESYSTEM);
3514         } else {
3515                 *cp = '\0';
3516                 h = zfs_open(hdl, target, ZFS_TYPE_FILESYSTEM);
3517                 *cp = '/';
3518         }
3519         if (h == NULL)
3520                 return (-1);
3521         zfs_close(h);
3522
3523         /*
3524          * Attempt to create, mount, and share any ancestor filesystems,
3525          * up to the prefixlen-long one.
3526          */
3527         for (cp = target + prefixlen + 1;
3528             (cp = strchr(cp, '/')) != NULL; *cp = '/', cp++) {
3529
3530                 *cp = '\0';
3531
3532                 h = make_dataset_handle(hdl, target);
3533                 if (h) {
3534                         /* it already exists, nothing to do here */
3535                         zfs_close(h);
3536                         continue;
3537                 }
3538
3539                 if (zfs_create(hdl, target, ZFS_TYPE_FILESYSTEM,
3540                     NULL) != 0) {
3541                         opname = dgettext(TEXT_DOMAIN, "create");
3542                         goto ancestorerr;
3543                 }
3544
3545                 h = zfs_open(hdl, target, ZFS_TYPE_FILESYSTEM);
3546                 if (h == NULL) {
3547                         opname = dgettext(TEXT_DOMAIN, "open");
3548                         goto ancestorerr;
3549                 }
3550
3551                 if (zfs_mount(h, NULL, 0) != 0) {
3552                         opname = dgettext(TEXT_DOMAIN, "mount");
3553                         goto ancestorerr;
3554                 }
3555
3556                 if (zfs_share(h) != 0) {
3557                         opname = dgettext(TEXT_DOMAIN, "share");
3558                         goto ancestorerr;
3559                 }
3560
3561                 zfs_close(h);
3562         }
3563         zfs_commit_all_shares();
3564
3565         return (0);
3566
3567 ancestorerr:
3568         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3569             "failed to %s ancestor '%s'"), opname, target);
3570         return (-1);
3571 }
3572
3573 /*
3574  * Creates non-existing ancestors of the given path.
3575  */
3576 int
3577 zfs_create_ancestors(libzfs_handle_t *hdl, const char *path)
3578 {
3579         int prefix;
3580         char *path_copy;
3581         char errbuf[1024];
3582         int rc = 0;
3583
3584         (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3585             "cannot create '%s'"), path);
3586
3587         /*
3588          * Check that we are not passing the nesting limit
3589          * before we start creating any ancestors.
3590          */
3591         if (dataset_nestcheck(path) != 0) {
3592                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3593                     "maximum name nesting depth exceeded"));
3594                 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3595         }
3596
3597         if (check_parents(hdl, path, NULL, B_TRUE, &prefix) != 0)
3598                 return (-1);
3599
3600         if ((path_copy = strdup(path)) != NULL) {
3601                 rc = create_parents(hdl, path_copy, prefix);
3602                 free(path_copy);
3603         }
3604         if (path_copy == NULL || rc != 0)
3605                 return (-1);
3606
3607         return (0);
3608 }
3609
3610 /*
3611  * Create a new filesystem or volume.
3612  */
3613 int
3614 zfs_create(libzfs_handle_t *hdl, const char *path, zfs_type_t type,
3615     nvlist_t *props)
3616 {
3617         int ret;
3618         uint64_t size = 0;
3619         uint64_t blocksize = zfs_prop_default_numeric(ZFS_PROP_VOLBLOCKSIZE);
3620         uint64_t zoned;
3621         enum lzc_dataset_type ost;
3622         zpool_handle_t *zpool_handle;
3623         uint8_t *wkeydata = NULL;
3624         uint_t wkeylen = 0;
3625         char errbuf[1024];
3626         char parent[ZFS_MAX_DATASET_NAME_LEN];
3627
3628         (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3629             "cannot create '%s'"), path);
3630
3631         /* validate the path, taking care to note the extended error message */
3632         if (!zfs_validate_name(hdl, path, type, B_TRUE))
3633                 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3634
3635         if (dataset_nestcheck(path) != 0) {
3636                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3637                     "maximum name nesting depth exceeded"));
3638                 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3639         }
3640
3641         /* validate parents exist */
3642         if (check_parents(hdl, path, &zoned, B_FALSE, NULL) != 0)
3643                 return (-1);
3644
3645         /*
3646          * The failure modes when creating a dataset of a different type over
3647          * one that already exists is a little strange.  In particular, if you
3648          * try to create a dataset on top of an existing dataset, the ioctl()
3649          * will return ENOENT, not EEXIST.  To prevent this from happening, we
3650          * first try to see if the dataset exists.
3651          */
3652         if (zfs_dataset_exists(hdl, path, ZFS_TYPE_DATASET)) {
3653                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3654                     "dataset already exists"));
3655                 return (zfs_error(hdl, EZFS_EXISTS, errbuf));
3656         }
3657
3658         if (type == ZFS_TYPE_VOLUME)
3659                 ost = LZC_DATSET_TYPE_ZVOL;
3660         else
3661                 ost = LZC_DATSET_TYPE_ZFS;
3662
3663         /* open zpool handle for prop validation */
3664         char pool_path[ZFS_MAX_DATASET_NAME_LEN];
3665         (void) strlcpy(pool_path, path, sizeof (pool_path));
3666
3667         /* truncate pool_path at first slash */
3668         char *p = strchr(pool_path, '/');
3669         if (p != NULL)
3670                 *p = '\0';
3671
3672         if ((zpool_handle = zpool_open(hdl, pool_path)) == NULL)
3673                 return (-1);
3674
3675         if (props && (props = zfs_valid_proplist(hdl, type, props,
3676             zoned, NULL, zpool_handle, B_TRUE, errbuf)) == 0) {
3677                 zpool_close(zpool_handle);
3678                 return (-1);
3679         }
3680         zpool_close(zpool_handle);
3681
3682         if (type == ZFS_TYPE_VOLUME) {
3683                 /*
3684                  * If we are creating a volume, the size and block size must
3685                  * satisfy a few restraints.  First, the blocksize must be a
3686                  * valid block size between SPA_{MIN,MAX}BLOCKSIZE.  Second, the
3687                  * volsize must be a multiple of the block size, and cannot be
3688                  * zero.
3689                  */
3690                 if (props == NULL || nvlist_lookup_uint64(props,
3691                     zfs_prop_to_name(ZFS_PROP_VOLSIZE), &size) != 0) {
3692                         nvlist_free(props);
3693                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3694                             "missing volume size"));
3695                         return (zfs_error(hdl, EZFS_BADPROP, errbuf));
3696                 }
3697
3698                 if ((ret = nvlist_lookup_uint64(props,
3699                     zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE),
3700                     &blocksize)) != 0) {
3701                         if (ret == ENOENT) {
3702                                 blocksize = zfs_prop_default_numeric(
3703                                     ZFS_PROP_VOLBLOCKSIZE);
3704                         } else {
3705                                 nvlist_free(props);
3706                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3707                                     "missing volume block size"));
3708                                 return (zfs_error(hdl, EZFS_BADPROP, errbuf));
3709                         }
3710                 }
3711
3712                 if (size == 0) {
3713                         nvlist_free(props);
3714                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3715                             "volume size cannot be zero"));
3716                         return (zfs_error(hdl, EZFS_BADPROP, errbuf));
3717                 }
3718
3719                 if (size % blocksize != 0) {
3720                         nvlist_free(props);
3721                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3722                             "volume size must be a multiple of volume block "
3723                             "size"));
3724                         return (zfs_error(hdl, EZFS_BADPROP, errbuf));
3725                 }
3726         }
3727
3728         (void) parent_name(path, parent, sizeof (parent));
3729         if (zfs_crypto_create(hdl, parent, props, NULL, B_TRUE,
3730             &wkeydata, &wkeylen) != 0) {
3731                 nvlist_free(props);
3732                 return (zfs_error(hdl, EZFS_CRYPTOFAILED, errbuf));
3733         }
3734
3735         /* create the dataset */
3736         ret = lzc_create(path, ost, props, wkeydata, wkeylen);
3737         nvlist_free(props);
3738         if (wkeydata != NULL)
3739                 free(wkeydata);
3740
3741         /* check for failure */
3742         if (ret != 0) {
3743                 switch (errno) {
3744                 case ENOENT:
3745                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3746                             "no such parent '%s'"), parent);
3747                         return (zfs_error(hdl, EZFS_NOENT, errbuf));
3748
3749                 case ENOTSUP:
3750                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3751                             "pool must be upgraded to set this "
3752                             "property or value"));
3753                         return (zfs_error(hdl, EZFS_BADVERSION, errbuf));
3754
3755                 case EACCES:
3756                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3757                             "encryption root's key is not loaded "
3758                             "or provided"));
3759                         return (zfs_error(hdl, EZFS_CRYPTOFAILED, errbuf));
3760
3761                 case ERANGE:
3762                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3763                             "invalid property value(s) specified"));
3764                         return (zfs_error(hdl, EZFS_BADPROP, errbuf));
3765 #ifdef _ILP32
3766                 case EOVERFLOW:
3767                         /*
3768                          * This platform can't address a volume this big.
3769                          */
3770                         if (type == ZFS_TYPE_VOLUME)
3771                                 return (zfs_error(hdl, EZFS_VOLTOOBIG,
3772                                     errbuf));
3773 #endif
3774                         /* FALLTHROUGH */
3775                 default:
3776                         return (zfs_standard_error(hdl, errno, errbuf));
3777                 }
3778         }
3779
3780         return (0);
3781 }
3782
3783 /*
3784  * Destroys the given dataset.  The caller must make sure that the filesystem
3785  * isn't mounted, and that there are no active dependents. If the file system
3786  * does not exist this function does nothing.
3787  */
3788 int
3789 zfs_destroy(zfs_handle_t *zhp, boolean_t defer)
3790 {
3791         int error;
3792
3793         if (zhp->zfs_type != ZFS_TYPE_SNAPSHOT && defer)
3794                 return (EINVAL);
3795
3796         if (zhp->zfs_type == ZFS_TYPE_BOOKMARK) {
3797                 nvlist_t *nv = fnvlist_alloc();
3798                 fnvlist_add_boolean(nv, zhp->zfs_name);
3799                 error = lzc_destroy_bookmarks(nv, NULL);
3800                 fnvlist_free(nv);
3801                 if (error != 0) {
3802                         return (zfs_standard_error_fmt(zhp->zfs_hdl, error,
3803                             dgettext(TEXT_DOMAIN, "cannot destroy '%s'"),
3804                             zhp->zfs_name));
3805                 }
3806                 return (0);
3807         }
3808
3809         if (zhp->zfs_type == ZFS_TYPE_SNAPSHOT) {
3810                 nvlist_t *nv = fnvlist_alloc();
3811                 fnvlist_add_boolean(nv, zhp->zfs_name);
3812                 error = lzc_destroy_snaps(nv, defer, NULL);
3813                 fnvlist_free(nv);
3814         } else {
3815                 error = lzc_destroy(zhp->zfs_name);
3816         }
3817
3818         if (error != 0 && error != ENOENT) {
3819                 return (zfs_standard_error_fmt(zhp->zfs_hdl, errno,
3820                     dgettext(TEXT_DOMAIN, "cannot destroy '%s'"),
3821                     zhp->zfs_name));
3822         }
3823
3824         remove_mountpoint(zhp);
3825
3826         return (0);
3827 }
3828
3829 struct destroydata {
3830         nvlist_t *nvl;
3831         const char *snapname;
3832 };
3833
3834 static int
3835 zfs_check_snap_cb(zfs_handle_t *zhp, void *arg)
3836 {
3837         struct destroydata *dd = arg;
3838         char name[ZFS_MAX_DATASET_NAME_LEN];
3839         int rv = 0;
3840
3841         if (snprintf(name, sizeof (name), "%s@%s", zhp->zfs_name,
3842             dd->snapname) >= sizeof (name))
3843                 return (EINVAL);
3844
3845         if (lzc_exists(name))
3846                 verify(nvlist_add_boolean(dd->nvl, name) == 0);
3847
3848         rv = zfs_iter_filesystems(zhp, zfs_check_snap_cb, dd);
3849         zfs_close(zhp);
3850         return (rv);
3851 }
3852
3853 /*
3854  * Destroys all snapshots with the given name in zhp & descendants.
3855  */
3856 int
3857 zfs_destroy_snaps(zfs_handle_t *zhp, char *snapname, boolean_t defer)
3858 {
3859         int ret;
3860         struct destroydata dd = { 0 };
3861
3862         dd.snapname = snapname;
3863         verify(nvlist_alloc(&dd.nvl, NV_UNIQUE_NAME, 0) == 0);
3864         (void) zfs_check_snap_cb(zfs_handle_dup(zhp), &dd);
3865
3866         if (nvlist_empty(dd.nvl)) {
3867                 ret = zfs_standard_error_fmt(zhp->zfs_hdl, ENOENT,
3868                     dgettext(TEXT_DOMAIN, "cannot destroy '%s@%s'"),
3869                     zhp->zfs_name, snapname);
3870         } else {
3871                 ret = zfs_destroy_snaps_nvl(zhp->zfs_hdl, dd.nvl, defer);
3872         }
3873         nvlist_free(dd.nvl);
3874         return (ret);
3875 }
3876
3877 /*
3878  * Destroys all the snapshots named in the nvlist.
3879  */
3880 int
3881 zfs_destroy_snaps_nvl(libzfs_handle_t *hdl, nvlist_t *snaps, boolean_t defer)
3882 {
3883         int ret;
3884         nvlist_t *errlist = NULL;
3885         nvpair_t *pair;
3886
3887         ret = lzc_destroy_snaps(snaps, defer, &errlist);
3888
3889         if (ret == 0) {
3890                 nvlist_free(errlist);
3891                 return (0);
3892         }
3893
3894         if (nvlist_empty(errlist)) {
3895                 char errbuf[1024];
3896                 (void) snprintf(errbuf, sizeof (errbuf),
3897                     dgettext(TEXT_DOMAIN, "cannot destroy snapshots"));
3898
3899                 ret = zfs_standard_error(hdl, ret, errbuf);
3900         }
3901         for (pair = nvlist_next_nvpair(errlist, NULL);
3902             pair != NULL; pair = nvlist_next_nvpair(errlist, pair)) {
3903                 char errbuf[1024];
3904                 (void) snprintf(errbuf, sizeof (errbuf),
3905                     dgettext(TEXT_DOMAIN, "cannot destroy snapshot %s"),
3906                     nvpair_name(pair));
3907
3908                 switch (fnvpair_value_int32(pair)) {
3909                 case EEXIST:
3910                         zfs_error_aux(hdl,
3911                             dgettext(TEXT_DOMAIN, "snapshot is cloned"));
3912                         ret = zfs_error(hdl, EZFS_EXISTS, errbuf);
3913                         break;
3914                 default:
3915                         ret = zfs_standard_error(hdl, errno, errbuf);
3916                         break;
3917                 }
3918         }
3919
3920         nvlist_free(errlist);
3921         return (ret);
3922 }
3923
3924 /*
3925  * Clones the given dataset.  The target must be of the same type as the source.
3926  */
3927 int
3928 zfs_clone(zfs_handle_t *zhp, const char *target, nvlist_t *props)
3929 {
3930         char parent[ZFS_MAX_DATASET_NAME_LEN];
3931         int ret;
3932         char errbuf[1024];
3933         libzfs_handle_t *hdl = zhp->zfs_hdl;
3934         uint64_t zoned;
3935
3936         assert(zhp->zfs_type == ZFS_TYPE_SNAPSHOT);
3937
3938         (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3939             "cannot create '%s'"), target);
3940
3941         /* validate the target/clone name */
3942         if (!zfs_validate_name(hdl, target, ZFS_TYPE_FILESYSTEM, B_TRUE))
3943                 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3944
3945         /* validate parents exist */
3946         if (check_parents(hdl, target, &zoned, B_FALSE, NULL) != 0)
3947                 return (-1);
3948
3949         (void) parent_name(target, parent, sizeof (parent));
3950
3951         /* do the clone */
3952
3953         if (props) {
3954                 zfs_type_t type;
3955
3956                 if (ZFS_IS_VOLUME(zhp)) {
3957                         type = ZFS_TYPE_VOLUME;
3958                 } else {
3959                         type = ZFS_TYPE_FILESYSTEM;
3960                 }
3961                 if ((props = zfs_valid_proplist(hdl, type, props, zoned,
3962                     zhp, zhp->zpool_hdl, B_TRUE, errbuf)) == NULL)
3963                         return (-1);
3964                 if (zfs_fix_auto_resv(zhp, props) == -1) {
3965                         nvlist_free(props);
3966                         return (-1);
3967                 }
3968         }
3969
3970         if (zfs_crypto_clone_check(hdl, zhp, parent, props) != 0) {
3971                 nvlist_free(props);
3972                 return (zfs_error(hdl, EZFS_CRYPTOFAILED, errbuf));
3973         }
3974
3975         ret = lzc_clone(target, zhp->zfs_name, props);
3976         nvlist_free(props);
3977
3978         if (ret != 0) {
3979                 switch (errno) {
3980
3981                 case ENOENT:
3982                         /*
3983                          * The parent doesn't exist.  We should have caught this
3984                          * above, but there may a race condition that has since
3985                          * destroyed the parent.
3986                          *
3987                          * At this point, we don't know whether it's the source
3988                          * that doesn't exist anymore, or whether the target
3989                          * dataset doesn't exist.
3990                          */
3991                         zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN,
3992                             "no such parent '%s'"), parent);
3993                         return (zfs_error(zhp->zfs_hdl, EZFS_NOENT, errbuf));
3994
3995                 case EXDEV:
3996                         zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN,
3997                             "source and target pools differ"));
3998                         return (zfs_error(zhp->zfs_hdl, EZFS_CROSSTARGET,
3999                             errbuf));
4000
4001                 default:
4002                         return (zfs_standard_error(zhp->zfs_hdl, errno,
4003                             errbuf));
4004                 }
4005         }
4006
4007         return (ret);
4008 }
4009
4010 /*
4011  * Promotes the given clone fs to be the clone parent.
4012  */
4013 int
4014 zfs_promote(zfs_handle_t *zhp)
4015 {
4016         libzfs_handle_t *hdl = zhp->zfs_hdl;
4017         char snapname[ZFS_MAX_DATASET_NAME_LEN];
4018         int ret;
4019         char errbuf[1024];
4020
4021         (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
4022             "cannot promote '%s'"), zhp->zfs_name);
4023
4024         if (zhp->zfs_type == ZFS_TYPE_SNAPSHOT) {
4025                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4026                     "snapshots can not be promoted"));
4027                 return (zfs_error(hdl, EZFS_BADTYPE, errbuf));
4028         }
4029
4030         if (zhp->zfs_dmustats.dds_origin[0] == '\0') {
4031                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4032                     "not a cloned filesystem"));
4033                 return (zfs_error(hdl, EZFS_BADTYPE, errbuf));
4034         }
4035
4036         if (!zfs_validate_name(hdl, zhp->zfs_name, zhp->zfs_type, B_TRUE))
4037                 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
4038
4039         ret = lzc_promote(zhp->zfs_name, snapname, sizeof (snapname));
4040
4041         if (ret != 0) {
4042                 switch (ret) {
4043                 case EACCES:
4044                         /*
4045                          * Promoting encrypted dataset outside its
4046                          * encryption root.
4047                          */
4048                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4049                             "cannot promote dataset outside its "
4050                             "encryption root"));
4051                         return (zfs_error(hdl, EZFS_EXISTS, errbuf));
4052
4053                 case EEXIST:
4054                         /* There is a conflicting snapshot name. */
4055                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4056                             "conflicting snapshot '%s' from parent '%s'"),
4057                             snapname, zhp->zfs_dmustats.dds_origin);
4058                         return (zfs_error(hdl, EZFS_EXISTS, errbuf));
4059
4060                 default:
4061                         return (zfs_standard_error(hdl, ret, errbuf));
4062                 }
4063         }
4064         return (ret);
4065 }
4066
4067 typedef struct snapdata {
4068         nvlist_t *sd_nvl;
4069         const char *sd_snapname;
4070 } snapdata_t;
4071
4072 static int
4073 zfs_snapshot_cb(zfs_handle_t *zhp, void *arg)
4074 {
4075         snapdata_t *sd = arg;
4076         char name[ZFS_MAX_DATASET_NAME_LEN];
4077         int rv = 0;
4078
4079         if (zfs_prop_get_int(zhp, ZFS_PROP_INCONSISTENT) == 0) {
4080                 if (snprintf(name, sizeof (name), "%s@%s", zfs_get_name(zhp),
4081                     sd->sd_snapname) >= sizeof (name))
4082                         return (EINVAL);
4083
4084                 fnvlist_add_boolean(sd->sd_nvl, name);
4085
4086                 rv = zfs_iter_filesystems(zhp, zfs_snapshot_cb, sd);
4087         }
4088         zfs_close(zhp);
4089
4090         return (rv);
4091 }
4092
4093 /*
4094  * Creates snapshots.  The keys in the snaps nvlist are the snapshots to be
4095  * created.
4096  */
4097 int
4098 zfs_snapshot_nvl(libzfs_handle_t *hdl, nvlist_t *snaps, nvlist_t *props)
4099 {
4100         int ret;
4101         char errbuf[1024];
4102         nvpair_t *elem;
4103         nvlist_t *errors;
4104         zpool_handle_t *zpool_hdl;
4105         char pool[ZFS_MAX_DATASET_NAME_LEN];
4106
4107         (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
4108             "cannot create snapshots "));
4109
4110         elem = NULL;
4111         while ((elem = nvlist_next_nvpair(snaps, elem)) != NULL) {
4112                 const char *snapname = nvpair_name(elem);
4113
4114                 /* validate the target name */
4115                 if (!zfs_validate_name(hdl, snapname, ZFS_TYPE_SNAPSHOT,
4116                     B_TRUE)) {
4117                         (void) snprintf(errbuf, sizeof (errbuf),
4118                             dgettext(TEXT_DOMAIN,
4119                             "cannot create snapshot '%s'"), snapname);
4120                         return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
4121                 }
4122         }
4123
4124         /*
4125          * get pool handle for prop validation. assumes all snaps are in the
4126          * same pool, as does lzc_snapshot (below).
4127          */
4128         elem = nvlist_next_nvpair(snaps, NULL);
4129         (void) strlcpy(pool, nvpair_name(elem), sizeof (pool));
4130         pool[strcspn(pool, "/@")] = '\0';
4131         zpool_hdl = zpool_open(hdl, pool);
4132         if (zpool_hdl == NULL)
4133                 return (-1);
4134
4135         if (props != NULL &&
4136             (props = zfs_valid_proplist(hdl, ZFS_TYPE_SNAPSHOT,
4137             props, B_FALSE, NULL, zpool_hdl, B_FALSE, errbuf)) == NULL) {
4138                 zpool_close(zpool_hdl);
4139                 return (-1);
4140         }
4141         zpool_close(zpool_hdl);
4142
4143         ret = lzc_snapshot(snaps, props, &errors);
4144
4145         if (ret != 0) {
4146                 boolean_t printed = B_FALSE;
4147                 for (elem = nvlist_next_nvpair(errors, NULL);
4148                     elem != NULL;
4149                     elem = nvlist_next_nvpair(errors, elem)) {
4150                         (void) snprintf(errbuf, sizeof (errbuf),
4151                             dgettext(TEXT_DOMAIN,
4152                             "cannot create snapshot '%s'"), nvpair_name(elem));
4153                         (void) zfs_standard_error(hdl,
4154                             fnvpair_value_int32(elem), errbuf);
4155                         printed = B_TRUE;
4156                 }
4157                 if (!printed) {
4158                         switch (ret) {
4159                         case EXDEV:
4160                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4161                                     "multiple snapshots of same "
4162                                     "fs not allowed"));
4163                                 (void) zfs_error(hdl, EZFS_EXISTS, errbuf);
4164
4165                                 break;
4166                         default:
4167                                 (void) zfs_standard_error(hdl, ret, errbuf);
4168                         }
4169                 }
4170         }
4171
4172         nvlist_free(props);
4173         nvlist_free(errors);
4174         return (ret);
4175 }
4176
4177 int
4178 zfs_snapshot(libzfs_handle_t *hdl, const char *path, boolean_t recursive,
4179     nvlist_t *props)
4180 {
4181         int ret;
4182         snapdata_t sd = { 0 };
4183         char fsname[ZFS_MAX_DATASET_NAME_LEN];
4184         char *cp;
4185         zfs_handle_t *zhp;
4186         char errbuf[1024];
4187
4188         (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
4189             "cannot snapshot %s"), path);
4190
4191         if (!zfs_validate_name(hdl, path, ZFS_TYPE_SNAPSHOT, B_TRUE))
4192                 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
4193
4194         (void) strlcpy(fsname, path, sizeof (fsname));
4195         cp = strchr(fsname, '@');
4196         *cp = '\0';
4197         sd.sd_snapname = cp + 1;
4198
4199         if ((zhp = zfs_open(hdl, fsname, ZFS_TYPE_FILESYSTEM |
4200             ZFS_TYPE_VOLUME)) == NULL) {
4201                 return (-1);
4202         }
4203
4204         verify(nvlist_alloc(&sd.sd_nvl, NV_UNIQUE_NAME, 0) == 0);
4205         if (recursive) {
4206                 (void) zfs_snapshot_cb(zfs_handle_dup(zhp), &sd);
4207         } else {
4208                 fnvlist_add_boolean(sd.sd_nvl, path);
4209         }
4210
4211         ret = zfs_snapshot_nvl(hdl, sd.sd_nvl, props);
4212         nvlist_free(sd.sd_nvl);
4213         zfs_close(zhp);
4214         return (ret);
4215 }
4216
4217 /*
4218  * Destroy any more recent snapshots.  We invoke this callback on any dependents
4219  * of the snapshot first.  If the 'cb_dependent' member is non-zero, then this
4220  * is a dependent and we should just destroy it without checking the transaction
4221  * group.
4222  */
4223 typedef struct rollback_data {
4224         const char      *cb_target;             /* the snapshot */
4225         uint64_t        cb_create;              /* creation time reference */
4226         boolean_t       cb_error;
4227         boolean_t       cb_force;
4228 } rollback_data_t;
4229
4230 static int
4231 rollback_destroy_dependent(zfs_handle_t *zhp, void *data)
4232 {
4233         rollback_data_t *cbp = data;
4234         prop_changelist_t *clp;
4235
4236         /* We must destroy this clone; first unmount it */
4237         clp = changelist_gather(zhp, ZFS_PROP_NAME, 0,
4238             cbp->cb_force ? MS_FORCE: 0);
4239         if (clp == NULL || changelist_prefix(clp) != 0) {
4240                 cbp->cb_error = B_TRUE;
4241                 zfs_close(zhp);
4242                 return (0);
4243         }
4244         if (zfs_destroy(zhp, B_FALSE) != 0)
4245                 cbp->cb_error = B_TRUE;
4246         else
4247                 changelist_remove(clp, zhp->zfs_name);
4248         (void) changelist_postfix(clp);
4249         changelist_free(clp);
4250
4251         zfs_close(zhp);
4252         return (0);
4253 }
4254
4255 static int
4256 rollback_destroy(zfs_handle_t *zhp, void *data)
4257 {
4258         rollback_data_t *cbp = data;
4259
4260         if (zfs_prop_get_int(zhp, ZFS_PROP_CREATETXG) > cbp->cb_create) {
4261                 cbp->cb_error |= zfs_iter_dependents(zhp, B_FALSE,
4262                     rollback_destroy_dependent, cbp);
4263
4264                 cbp->cb_error |= zfs_destroy(zhp, B_FALSE);
4265         }
4266
4267         zfs_close(zhp);
4268         return (0);
4269 }
4270
4271 /*
4272  * Given a dataset, rollback to a specific snapshot, discarding any
4273  * data changes since then and making it the active dataset.
4274  *
4275  * Any snapshots and bookmarks more recent than the target are
4276  * destroyed, along with their dependents (i.e. clones).
4277  */
4278 int
4279 zfs_rollback(zfs_handle_t *zhp, zfs_handle_t *snap, boolean_t force)
4280 {
4281         rollback_data_t cb = { 0 };
4282         int err;
4283         boolean_t restore_resv = 0;
4284         uint64_t old_volsize = 0, new_volsize;
4285         zfs_prop_t resv_prop = { 0 };
4286         uint64_t min_txg = 0;
4287
4288         assert(zhp->zfs_type == ZFS_TYPE_FILESYSTEM ||
4289             zhp->zfs_type == ZFS_TYPE_VOLUME);
4290
4291         /*
4292          * Destroy all recent snapshots and their dependents.
4293          */
4294         cb.cb_force = force;
4295         cb.cb_target = snap->zfs_name;
4296         cb.cb_create = zfs_prop_get_int(snap, ZFS_PROP_CREATETXG);
4297
4298         if (cb.cb_create > 0)
4299                 min_txg = cb.cb_create;
4300
4301         (void) zfs_iter_snapshots(zhp, B_FALSE, rollback_destroy, &cb,
4302             min_txg, 0);
4303
4304         (void) zfs_iter_bookmarks(zhp, rollback_destroy, &cb);
4305
4306         if (cb.cb_error)
4307                 return (-1);
4308
4309         /*
4310          * Now that we have verified that the snapshot is the latest,
4311          * rollback to the given snapshot.
4312          */
4313
4314         if (zhp->zfs_type == ZFS_TYPE_VOLUME) {
4315                 if (zfs_which_resv_prop(zhp, &resv_prop) < 0)
4316                         return (-1);
4317                 old_volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE);
4318                 restore_resv =
4319                     (old_volsize == zfs_prop_get_int(zhp, resv_prop));
4320         }
4321
4322         /*
4323          * Pass both the filesystem and the wanted snapshot names,
4324          * we would get an error back if the snapshot is destroyed or
4325          * a new snapshot is created before this request is processed.
4326          */
4327         err = lzc_rollback_to(zhp->zfs_name, snap->zfs_name);
4328         if (err != 0) {
4329                 char errbuf[1024];
4330
4331                 (void) snprintf(errbuf, sizeof (errbuf),
4332                     dgettext(TEXT_DOMAIN, "cannot rollback '%s'"),
4333                     zhp->zfs_name);
4334                 switch (err) {
4335                 case EEXIST:
4336                         zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN,
4337                             "there is a snapshot or bookmark more recent "
4338                             "than '%s'"), snap->zfs_name);
4339                         (void) zfs_error(zhp->zfs_hdl, EZFS_EXISTS, errbuf);
4340                         break;
4341                 case ESRCH:
4342                         zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN,
4343                             "'%s' is not found among snapshots of '%s'"),
4344                             snap->zfs_name, zhp->zfs_name);
4345                         (void) zfs_error(zhp->zfs_hdl, EZFS_NOENT, errbuf);
4346                         break;
4347                 case EINVAL:
4348                         (void) zfs_error(zhp->zfs_hdl, EZFS_BADTYPE, errbuf);
4349                         break;
4350                 default:
4351                         (void) zfs_standard_error(zhp->zfs_hdl, err, errbuf);
4352                 }
4353                 return (err);
4354         }
4355
4356         /*
4357          * For volumes, if the pre-rollback volsize matched the pre-
4358          * rollback reservation and the volsize has changed then set
4359          * the reservation property to the post-rollback volsize.
4360          * Make a new handle since the rollback closed the dataset.
4361          */
4362         if ((zhp->zfs_type == ZFS_TYPE_VOLUME) &&
4363             (zhp = make_dataset_handle(zhp->zfs_hdl, zhp->zfs_name))) {
4364                 if (restore_resv) {
4365                         new_volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE);
4366                         if (old_volsize != new_volsize)
4367                                 err = zfs_prop_set_int(zhp, resv_prop,
4368                                     new_volsize);
4369                 }
4370                 zfs_close(zhp);
4371         }
4372         return (err);
4373 }
4374
4375 /*
4376  * Renames the given dataset.
4377  */
4378 int
4379 zfs_rename(zfs_handle_t *zhp, const char *target, renameflags_t flags)
4380 {
4381         int ret = 0;
4382         zfs_cmd_t zc = {"\0"};
4383         char *delim;
4384         prop_changelist_t *cl = NULL;
4385         char parent[ZFS_MAX_DATASET_NAME_LEN];
4386         char property[ZFS_MAXPROPLEN];
4387         libzfs_handle_t *hdl = zhp->zfs_hdl;
4388         char errbuf[1024];
4389
4390         /* if we have the same exact name, just return success */
4391         if (strcmp(zhp->zfs_name, target) == 0)
4392                 return (0);
4393
4394         (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
4395             "cannot rename to '%s'"), target);
4396
4397         /* make sure source name is valid */
4398         if (!zfs_validate_name(hdl, zhp->zfs_name, zhp->zfs_type, B_TRUE))
4399                 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
4400
4401         /*
4402          * Make sure the target name is valid
4403          */
4404         if (zhp->zfs_type == ZFS_TYPE_SNAPSHOT) {
4405                 if ((strchr(target, '@') == NULL) ||
4406                     *target == '@') {
4407                         /*
4408                          * Snapshot target name is abbreviated,
4409                          * reconstruct full dataset name
4410                          */
4411                         (void) strlcpy(parent, zhp->zfs_name,
4412                             sizeof (parent));
4413                         delim = strchr(parent, '@');
4414                         if (strchr(target, '@') == NULL)
4415                                 *(++delim) = '\0';
4416                         else
4417                                 *delim = '\0';
4418                         (void) strlcat(parent, target, sizeof (parent));
4419                         target = parent;
4420                 } else {
4421                         /*
4422                          * Make sure we're renaming within the same dataset.
4423                          */
4424                         delim = strchr(target, '@');
4425                         if (strncmp(zhp->zfs_name, target, delim - target)
4426                             != 0 || zhp->zfs_name[delim - target] != '@') {
4427                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4428                                     "snapshots must be part of same "
4429                                     "dataset"));
4430                                 return (zfs_error(hdl, EZFS_CROSSTARGET,
4431                                     errbuf));
4432                         }
4433                 }
4434
4435                 if (!zfs_validate_name(hdl, target, zhp->zfs_type, B_TRUE))
4436                         return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
4437         } else {
4438                 if (flags.recursive) {
4439                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4440                             "recursive rename must be a snapshot"));
4441                         return (zfs_error(hdl, EZFS_BADTYPE, errbuf));
4442                 }
4443
4444                 if (!zfs_validate_name(hdl, target, zhp->zfs_type, B_TRUE))
4445                         return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
4446
4447                 /* validate parents */
4448                 if (check_parents(hdl, target, NULL, B_FALSE, NULL) != 0)
4449                         return (-1);
4450
4451                 /* make sure we're in the same pool */
4452                 verify((delim = strchr(target, '/')) != NULL);
4453                 if (strncmp(zhp->zfs_name, target, delim - target) != 0 ||
4454                     zhp->zfs_name[delim - target] != '/') {
4455                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4456                             "datasets must be within same pool"));
4457                         return (zfs_error(hdl, EZFS_CROSSTARGET, errbuf));
4458                 }
4459
4460                 /* new name cannot be a child of the current dataset name */
4461                 if (is_descendant(zhp->zfs_name, target)) {
4462                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4463                             "New dataset name cannot be a descendant of "
4464                             "current dataset name"));
4465                         return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
4466                 }
4467         }
4468
4469         (void) snprintf(errbuf, sizeof (errbuf),
4470             dgettext(TEXT_DOMAIN, "cannot rename '%s'"), zhp->zfs_name);
4471
4472         if (getzoneid() == GLOBAL_ZONEID &&
4473             zfs_prop_get_int(zhp, ZFS_PROP_ZONED)) {
4474                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4475                     "dataset is used in a non-global zone"));
4476                 return (zfs_error(hdl, EZFS_ZONED, errbuf));
4477         }
4478
4479         /*
4480          * Avoid unmounting file systems with mountpoint property set to
4481          * 'legacy' or 'none' even if -u option is not given.
4482          */
4483         if (zhp->zfs_type == ZFS_TYPE_FILESYSTEM &&
4484             !flags.recursive && !flags.nounmount &&
4485             zfs_prop_get(zhp, ZFS_PROP_MOUNTPOINT, property,
4486             sizeof (property), NULL, NULL, 0, B_FALSE) == 0 &&
4487             (strcmp(property, "legacy") == 0 ||
4488             strcmp(property, "none") == 0)) {
4489                 flags.nounmount = B_TRUE;
4490         }
4491         if (flags.recursive) {
4492                 char *parentname = zfs_strdup(zhp->zfs_hdl, zhp->zfs_name);
4493                 if (parentname == NULL) {
4494                         ret = -1;
4495                         goto error;
4496                 }
4497                 delim = strchr(parentname, '@');
4498                 *delim = '\0';
4499                 zfs_handle_t *zhrp = zfs_open(zhp->zfs_hdl, parentname,
4500                     ZFS_TYPE_DATASET);
4501                 free(parentname);
4502                 if (zhrp == NULL) {
4503                         ret = -1;
4504                         goto error;
4505                 }
4506                 zfs_close(zhrp);
4507         } else if (zhp->zfs_type != ZFS_TYPE_SNAPSHOT) {
4508                 if ((cl = changelist_gather(zhp, ZFS_PROP_NAME,
4509                     flags.nounmount ? CL_GATHER_DONT_UNMOUNT :
4510                     CL_GATHER_ITER_MOUNTED,
4511                     flags.forceunmount ? MS_FORCE : 0)) == NULL)
4512                         return (-1);
4513
4514                 if (changelist_haszonedchild(cl)) {
4515                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4516                             "child dataset with inherited mountpoint is used "
4517                             "in a non-global zone"));
4518                         (void) zfs_error(hdl, EZFS_ZONED, errbuf);
4519                         ret = -1;
4520                         goto error;
4521                 }
4522
4523                 if ((ret = changelist_prefix(cl)) != 0)
4524                         goto error;
4525         }
4526
4527         if (ZFS_IS_VOLUME(zhp))
4528                 zc.zc_objset_type = DMU_OST_ZVOL;
4529         else
4530                 zc.zc_objset_type = DMU_OST_ZFS;
4531
4532         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
4533         (void) strlcpy(zc.zc_value, target, sizeof (zc.zc_value));
4534
4535         zc.zc_cookie = !!flags.recursive;
4536         zc.zc_cookie |= (!!flags.nounmount) << 1;
4537
4538         if ((ret = zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_RENAME, &zc)) != 0) {
4539                 /*
4540                  * if it was recursive, the one that actually failed will
4541                  * be in zc.zc_name
4542                  */
4543                 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
4544                     "cannot rename '%s'"), zc.zc_name);
4545
4546                 if (flags.recursive && errno == EEXIST) {
4547                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4548                             "a child dataset already has a snapshot "
4549                             "with the new name"));
4550                         (void) zfs_error(hdl, EZFS_EXISTS, errbuf);
4551                 } else if (errno == EACCES) {
4552                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4553                             "cannot move encrypted child outside of "
4554                             "its encryption root"));
4555                         (void) zfs_error(hdl, EZFS_CRYPTOFAILED, errbuf);
4556                 } else {
4557                         (void) zfs_standard_error(zhp->zfs_hdl, errno, errbuf);
4558                 }
4559
4560                 /*
4561                  * On failure, we still want to remount any filesystems that
4562                  * were previously mounted, so we don't alter the system state.
4563                  */
4564                 if (cl != NULL)
4565                         (void) changelist_postfix(cl);
4566         } else {
4567                 if (cl != NULL) {
4568                         changelist_rename(cl, zfs_get_name(zhp), target);
4569                         ret = changelist_postfix(cl);
4570                 }
4571         }
4572
4573 error:
4574         if (cl != NULL) {
4575                 changelist_free(cl);
4576         }
4577         return (ret);
4578 }
4579
4580 nvlist_t *
4581 zfs_get_all_props(zfs_handle_t *zhp)
4582 {
4583         return (zhp->zfs_props);
4584 }
4585
4586 nvlist_t *
4587 zfs_get_recvd_props(zfs_handle_t *zhp)
4588 {
4589         if (zhp->zfs_recvd_props == NULL)
4590                 if (get_recvd_props_ioctl(zhp) != 0)
4591                         return (NULL);
4592         return (zhp->zfs_recvd_props);
4593 }
4594
4595 nvlist_t *
4596 zfs_get_user_props(zfs_handle_t *zhp)
4597 {
4598         return (zhp->zfs_user_props);
4599 }
4600
4601 /*
4602  * This function is used by 'zfs list' to determine the exact set of columns to
4603  * display, and their maximum widths.  This does two main things:
4604  *
4605  *      - If this is a list of all properties, then expand the list to include
4606  *        all native properties, and set a flag so that for each dataset we look
4607  *        for new unique user properties and add them to the list.
4608  *
4609  *      - For non fixed-width properties, keep track of the maximum width seen
4610  *        so that we can size the column appropriately. If the user has
4611  *        requested received property values, we also need to compute the width
4612  *        of the RECEIVED column.
4613  */
4614 int
4615 zfs_expand_proplist(zfs_handle_t *zhp, zprop_list_t **plp, boolean_t received,
4616     boolean_t literal)
4617 {
4618         libzfs_handle_t *hdl = zhp->zfs_hdl;
4619         zprop_list_t *entry;
4620         zprop_list_t **last, **start;
4621         nvlist_t *userprops, *propval;
4622         nvpair_t *elem;
4623         char *strval;
4624         char buf[ZFS_MAXPROPLEN];
4625
4626         if (zprop_expand_list(hdl, plp, ZFS_TYPE_DATASET) != 0)
4627                 return (-1);
4628
4629         userprops = zfs_get_user_props(zhp);
4630
4631         entry = *plp;
4632         if (entry->pl_all && nvlist_next_nvpair(userprops, NULL) != NULL) {
4633                 /*
4634                  * Go through and add any user properties as necessary.  We
4635                  * start by incrementing our list pointer to the first
4636                  * non-native property.
4637                  */
4638                 start = plp;
4639                 while (*start != NULL) {
4640                         if ((*start)->pl_prop == ZPROP_INVAL)
4641                                 break;
4642                         start = &(*start)->pl_next;
4643                 }
4644
4645                 elem = NULL;
4646                 while ((elem = nvlist_next_nvpair(userprops, elem)) != NULL) {
4647                         /*
4648                          * See if we've already found this property in our list.
4649                          */
4650                         for (last = start; *last != NULL;
4651                             last = &(*last)->pl_next) {
4652                                 if (strcmp((*last)->pl_user_prop,
4653                                     nvpair_name(elem)) == 0)
4654                                         break;
4655                         }
4656
4657                         if (*last == NULL) {
4658                                 if ((entry = zfs_alloc(hdl,
4659                                     sizeof (zprop_list_t))) == NULL ||
4660                                     ((entry->pl_user_prop = zfs_strdup(hdl,
4661                                     nvpair_name(elem)))) == NULL) {
4662                                         free(entry);
4663                                         return (-1);
4664                                 }
4665
4666                                 entry->pl_prop = ZPROP_INVAL;
4667                                 entry->pl_width = strlen(nvpair_name(elem));
4668                                 entry->pl_all = B_TRUE;
4669                                 *last = entry;
4670                         }
4671                 }
4672         }
4673
4674         /*
4675          * Now go through and check the width of any non-fixed columns
4676          */
4677         for (entry = *plp; entry != NULL; entry = entry->pl_next) {
4678                 if (entry->pl_fixed && !literal)
4679                         continue;
4680
4681                 if (entry->pl_prop != ZPROP_INVAL) {
4682                         if (zfs_prop_get(zhp, entry->pl_prop,
4683                             buf, sizeof (buf), NULL, NULL, 0, literal) == 0) {
4684                                 if (strlen(buf) > entry->pl_width)
4685                                         entry->pl_width = strlen(buf);
4686                         }
4687                         if (received && zfs_prop_get_recvd(zhp,
4688                             zfs_prop_to_name(entry->pl_prop),
4689                             buf, sizeof (buf), literal) == 0)
4690                                 if (strlen(buf) > entry->pl_recvd_width)
4691                                         entry->pl_recvd_width = strlen(buf);
4692                 } else {
4693                         if (nvlist_lookup_nvlist(userprops, entry->pl_user_prop,
4694                             &propval) == 0) {
4695                                 verify(nvlist_lookup_string(propval,
4696                                     ZPROP_VALUE, &strval) == 0);
4697                                 if (strlen(strval) > entry->pl_width)
4698                                         entry->pl_width = strlen(strval);
4699                         }
4700                         if (received && zfs_prop_get_recvd(zhp,
4701                             entry->pl_user_prop,
4702                             buf, sizeof (buf), literal) == 0)
4703                                 if (strlen(buf) > entry->pl_recvd_width)
4704                                         entry->pl_recvd_width = strlen(buf);
4705                 }
4706         }
4707
4708         return (0);
4709 }
4710
4711 void
4712 zfs_prune_proplist(zfs_handle_t *zhp, uint8_t *props)
4713 {
4714         nvpair_t *curr;
4715         nvpair_t *next;
4716
4717         /*
4718          * Keep a reference to the props-table against which we prune the
4719          * properties.
4720          */
4721         zhp->zfs_props_table = props;
4722
4723         curr = nvlist_next_nvpair(zhp->zfs_props, NULL);
4724
4725         while (curr) {
4726                 zfs_prop_t zfs_prop = zfs_name_to_prop(nvpair_name(curr));
4727                 next = nvlist_next_nvpair(zhp->zfs_props, curr);
4728
4729                 /*
4730                  * User properties will result in ZPROP_INVAL, and since we
4731                  * only know how to prune standard ZFS properties, we always
4732                  * leave these in the list.  This can also happen if we
4733                  * encounter an unknown DSL property (when running older
4734                  * software, for example).
4735                  */
4736                 if (zfs_prop != ZPROP_INVAL && props[zfs_prop] == B_FALSE)
4737                         (void) nvlist_remove(zhp->zfs_props,
4738                             nvpair_name(curr), nvpair_type(curr));
4739                 curr = next;
4740         }
4741 }
4742
4743 static int
4744 zfs_smb_acl_mgmt(libzfs_handle_t *hdl, char *dataset, char *path,
4745     zfs_smb_acl_op_t cmd, char *resource1, char *resource2)
4746 {
4747         zfs_cmd_t zc = {"\0"};
4748         nvlist_t *nvlist = NULL;
4749         int error;
4750
4751         (void) strlcpy(zc.zc_name, dataset, sizeof (zc.zc_name));
4752         (void) strlcpy(zc.zc_value, path, sizeof (zc.zc_value));
4753         zc.zc_cookie = (uint64_t)cmd;
4754
4755         if (cmd == ZFS_SMB_ACL_RENAME) {
4756                 if (nvlist_alloc(&nvlist, NV_UNIQUE_NAME, 0) != 0) {
4757                         (void) no_memory(hdl);
4758                         return (0);
4759                 }
4760         }
4761
4762         switch (cmd) {
4763         case ZFS_SMB_ACL_ADD:
4764         case ZFS_SMB_ACL_REMOVE:
4765                 (void) strlcpy(zc.zc_string, resource1, sizeof (zc.zc_string));
4766                 break;
4767         case ZFS_SMB_ACL_RENAME:
4768                 if (nvlist_add_string(nvlist, ZFS_SMB_ACL_SRC,
4769                     resource1) != 0) {
4770                                 (void) no_memory(hdl);
4771                                 return (-1);
4772                 }
4773                 if (nvlist_add_string(nvlist, ZFS_SMB_ACL_TARGET,
4774                     resource2) != 0) {
4775                                 (void) no_memory(hdl);
4776                                 return (-1);
4777                 }
4778                 if (zcmd_write_src_nvlist(hdl, &zc, nvlist) != 0) {
4779                         nvlist_free(nvlist);
4780                         return (-1);
4781                 }
4782                 break;
4783         case ZFS_SMB_ACL_PURGE:
4784                 break;
4785         default:
4786                 return (-1);
4787         }
4788         error = ioctl(hdl->libzfs_fd, ZFS_IOC_SMB_ACL, &zc);
4789         nvlist_free(nvlist);
4790         return (error);
4791 }
4792
4793 int
4794 zfs_smb_acl_add(libzfs_handle_t *hdl, char *dataset,
4795     char *path, char *resource)
4796 {
4797         return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_ADD,
4798             resource, NULL));
4799 }
4800
4801 int
4802 zfs_smb_acl_remove(libzfs_handle_t *hdl, char *dataset,
4803     char *path, char *resource)
4804 {
4805         return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_REMOVE,
4806             resource, NULL));
4807 }
4808
4809 int
4810 zfs_smb_acl_purge(libzfs_handle_t *hdl, char *dataset, char *path)
4811 {
4812         return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_PURGE,
4813             NULL, NULL));
4814 }
4815
4816 int
4817 zfs_smb_acl_rename(libzfs_handle_t *hdl, char *dataset, char *path,
4818     char *oldname, char *newname)
4819 {
4820         return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_RENAME,
4821             oldname, newname));
4822 }
4823
4824 int
4825 zfs_userspace(zfs_handle_t *zhp, zfs_userquota_prop_t type,
4826     zfs_userspace_cb_t func, void *arg)
4827 {
4828         zfs_cmd_t zc = {"\0"};
4829         zfs_useracct_t buf[100];
4830         libzfs_handle_t *hdl = zhp->zfs_hdl;
4831         int ret;
4832
4833         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
4834
4835         zc.zc_objset_type = type;
4836         zc.zc_nvlist_dst = (uintptr_t)buf;
4837
4838         for (;;) {
4839                 zfs_useracct_t *zua = buf;
4840
4841                 zc.zc_nvlist_dst_size = sizeof (buf);
4842                 if (zfs_ioctl(hdl, ZFS_IOC_USERSPACE_MANY, &zc) != 0) {
4843                         char errbuf[1024];
4844
4845                         if ((errno == ENOTSUP &&
4846                             (type == ZFS_PROP_USEROBJUSED ||
4847                             type == ZFS_PROP_GROUPOBJUSED ||
4848                             type == ZFS_PROP_USEROBJQUOTA ||
4849                             type == ZFS_PROP_GROUPOBJQUOTA ||
4850                             type == ZFS_PROP_PROJECTOBJUSED ||
4851                             type == ZFS_PROP_PROJECTOBJQUOTA ||
4852                             type == ZFS_PROP_PROJECTUSED ||
4853                             type == ZFS_PROP_PROJECTQUOTA)))
4854                                 break;
4855
4856                         (void) snprintf(errbuf, sizeof (errbuf),
4857                             dgettext(TEXT_DOMAIN,
4858                             "cannot get used/quota for %s"), zc.zc_name);
4859                         return (zfs_standard_error_fmt(hdl, errno, errbuf));
4860                 }
4861                 if (zc.zc_nvlist_dst_size == 0)
4862                         break;
4863
4864                 while (zc.zc_nvlist_dst_size > 0) {
4865                         if ((ret = func(arg, zua->zu_domain, zua->zu_rid,
4866                             zua->zu_space)) != 0)
4867                                 return (ret);
4868                         zua++;
4869                         zc.zc_nvlist_dst_size -= sizeof (zfs_useracct_t);
4870                 }
4871         }
4872
4873         return (0);
4874 }
4875
4876 struct holdarg {
4877         nvlist_t *nvl;
4878         const char *snapname;
4879         const char *tag;
4880         boolean_t recursive;
4881         int error;
4882 };
4883
4884 static int
4885 zfs_hold_one(zfs_handle_t *zhp, void *arg)
4886 {
4887         struct holdarg *ha = arg;
4888         char name[ZFS_MAX_DATASET_NAME_LEN];
4889         int rv = 0;
4890
4891         if (snprintf(name, sizeof (name), "%s@%s", zhp->zfs_name,
4892             ha->snapname) >= sizeof (name))
4893                 return (EINVAL);
4894
4895         if (lzc_exists(name))
4896                 fnvlist_add_string(ha->nvl, name, ha->tag);
4897
4898         if (ha->recursive)
4899                 rv = zfs_iter_filesystems(zhp, zfs_hold_one, ha);
4900         zfs_close(zhp);
4901         return (rv);
4902 }
4903
4904 int
4905 zfs_hold(zfs_handle_t *zhp, const char *snapname, const char *tag,
4906     boolean_t recursive, int cleanup_fd)
4907 {
4908         int ret;
4909         struct holdarg ha;
4910
4911         ha.nvl = fnvlist_alloc();
4912         ha.snapname = snapname;
4913         ha.tag = tag;
4914         ha.recursive = recursive;
4915         (void) zfs_hold_one(zfs_handle_dup(zhp), &ha);
4916
4917         if (nvlist_empty(ha.nvl)) {
4918                 char errbuf[1024];
4919
4920                 fnvlist_free(ha.nvl);
4921                 ret = ENOENT;
4922                 (void) snprintf(errbuf, sizeof (errbuf),
4923                     dgettext(TEXT_DOMAIN,
4924                     "cannot hold snapshot '%s@%s'"),
4925                     zhp->zfs_name, snapname);
4926                 (void) zfs_standard_error(zhp->zfs_hdl, ret, errbuf);
4927                 return (ret);
4928         }
4929
4930         ret = zfs_hold_nvl(zhp, cleanup_fd, ha.nvl);
4931         fnvlist_free(ha.nvl);
4932
4933         return (ret);
4934 }
4935
4936 int
4937 zfs_hold_nvl(zfs_handle_t *zhp, int cleanup_fd, nvlist_t *holds)
4938 {
4939         int ret;
4940         nvlist_t *errors;
4941         libzfs_handle_t *hdl = zhp->zfs_hdl;
4942         char errbuf[1024];
4943         nvpair_t *elem;
4944
4945         errors = NULL;
4946         ret = lzc_hold(holds, cleanup_fd, &errors);
4947
4948         if (ret == 0) {
4949                 /* There may be errors even in the success case. */
4950                 fnvlist_free(errors);
4951                 return (0);
4952         }
4953
4954         if (nvlist_empty(errors)) {
4955                 /* no hold-specific errors */
4956                 (void) snprintf(errbuf, sizeof (errbuf),
4957                     dgettext(TEXT_DOMAIN, "cannot hold"));
4958                 switch (ret) {
4959                 case ENOTSUP:
4960                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4961                             "pool must be upgraded"));
4962                         (void) zfs_error(hdl, EZFS_BADVERSION, errbuf);
4963                         break;
4964                 case EINVAL:
4965                         (void) zfs_error(hdl, EZFS_BADTYPE, errbuf);
4966                         break;
4967                 default:
4968                         (void) zfs_standard_error(hdl, ret, errbuf);
4969                 }
4970         }
4971
4972         for (elem = nvlist_next_nvpair(errors, NULL);
4973             elem != NULL;
4974             elem = nvlist_next_nvpair(errors, elem)) {
4975                 (void) snprintf(errbuf, sizeof (errbuf),
4976                     dgettext(TEXT_DOMAIN,
4977                     "cannot hold snapshot '%s'"), nvpair_name(elem));
4978                 switch (fnvpair_value_int32(elem)) {
4979                 case E2BIG:
4980                         /*
4981                          * Temporary tags wind up having the ds object id
4982                          * prepended. So even if we passed the length check
4983                          * above, it's still possible for the tag to wind
4984                          * up being slightly too long.
4985                          */
4986                         (void) zfs_error(hdl, EZFS_TAGTOOLONG, errbuf);
4987                         break;
4988                 case EINVAL:
4989                         (void) zfs_error(hdl, EZFS_BADTYPE, errbuf);
4990                         break;
4991                 case EEXIST:
4992                         (void) zfs_error(hdl, EZFS_REFTAG_HOLD, errbuf);
4993                         break;
4994                 default:
4995                         (void) zfs_standard_error(hdl,
4996                             fnvpair_value_int32(elem), errbuf);
4997                 }
4998         }
4999
5000         fnvlist_free(errors);
5001         return (ret);
5002 }
5003
5004 static int
5005 zfs_release_one(zfs_handle_t *zhp, void *arg)
5006 {
5007         struct holdarg *ha = arg;
5008         char name[ZFS_MAX_DATASET_NAME_LEN];
5009         int rv = 0;
5010         nvlist_t *existing_holds;
5011
5012         if (snprintf(name, sizeof (name), "%s@%s", zhp->zfs_name,
5013             ha->snapname) >= sizeof (name)) {
5014                 ha->error = EINVAL;
5015                 rv = EINVAL;
5016         }
5017
5018         if (lzc_get_holds(name, &existing_holds) != 0) {
5019                 ha->error = ENOENT;
5020         } else if (!nvlist_exists(existing_holds, ha->tag)) {
5021                 ha->error = ESRCH;
5022         } else {
5023                 nvlist_t *torelease = fnvlist_alloc();
5024                 fnvlist_add_boolean(torelease, ha->tag);
5025                 fnvlist_add_nvlist(ha->nvl, name, torelease);
5026                 fnvlist_free(torelease);
5027         }
5028
5029         if (ha->recursive)
5030                 rv = zfs_iter_filesystems(zhp, zfs_release_one, ha);
5031         zfs_close(zhp);
5032         return (rv);
5033 }
5034
5035 int
5036 zfs_release(zfs_handle_t *zhp, const char *snapname, const char *tag,
5037     boolean_t recursive)
5038 {
5039         int ret;
5040         struct holdarg ha;
5041         nvlist_t *errors = NULL;
5042         nvpair_t *elem;
5043         libzfs_handle_t *hdl = zhp->zfs_hdl;
5044         char errbuf[1024];
5045
5046         ha.nvl = fnvlist_alloc();
5047         ha.snapname = snapname;
5048         ha.tag = tag;
5049         ha.recursive = recursive;
5050         ha.error = 0;
5051         (void) zfs_release_one(zfs_handle_dup(zhp), &ha);
5052
5053         if (nvlist_empty(ha.nvl)) {
5054                 fnvlist_free(ha.nvl);
5055                 ret = ha.error;
5056                 (void) snprintf(errbuf, sizeof (errbuf),
5057                     dgettext(TEXT_DOMAIN,
5058                     "cannot release hold from snapshot '%s@%s'"),
5059                     zhp->zfs_name, snapname);
5060                 if (ret == ESRCH) {
5061                         (void) zfs_error(hdl, EZFS_REFTAG_RELE, errbuf);
5062                 } else {
5063                         (void) zfs_standard_error(hdl, ret, errbuf);
5064                 }
5065                 return (ret);
5066         }
5067
5068         ret = lzc_release(ha.nvl, &errors);
5069         fnvlist_free(ha.nvl);
5070
5071         if (ret == 0) {
5072                 /* There may be errors even in the success case. */
5073                 fnvlist_free(errors);
5074                 return (0);
5075         }
5076
5077         if (nvlist_empty(errors)) {
5078                 /* no hold-specific errors */
5079                 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
5080                     "cannot release"));
5081                 switch (errno) {
5082                 case ENOTSUP:
5083                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
5084                             "pool must be upgraded"));
5085                         (void) zfs_error(hdl, EZFS_BADVERSION, errbuf);
5086                         break;
5087                 default:
5088                         (void) zfs_standard_error_fmt(hdl, errno, errbuf);
5089                 }
5090         }
5091
5092         for (elem = nvlist_next_nvpair(errors, NULL);
5093             elem != NULL;
5094             elem = nvlist_next_nvpair(errors, elem)) {
5095                 (void) snprintf(errbuf, sizeof (errbuf),
5096                     dgettext(TEXT_DOMAIN,
5097                     "cannot release hold from snapshot '%s'"),
5098                     nvpair_name(elem));
5099                 switch (fnvpair_value_int32(elem)) {
5100                 case ESRCH:
5101                         (void) zfs_error(hdl, EZFS_REFTAG_RELE, errbuf);
5102                         break;
5103                 case EINVAL:
5104                         (void) zfs_error(hdl, EZFS_BADTYPE, errbuf);
5105                         break;
5106                 default:
5107                         (void) zfs_standard_error_fmt(hdl,
5108                             fnvpair_value_int32(elem), errbuf);
5109                 }
5110         }
5111
5112         fnvlist_free(errors);
5113         return (ret);
5114 }
5115
5116 int
5117 zfs_get_fsacl(zfs_handle_t *zhp, nvlist_t **nvl)
5118 {
5119         zfs_cmd_t zc = {"\0"};
5120         libzfs_handle_t *hdl = zhp->zfs_hdl;
5121         int nvsz = 2048;
5122         void *nvbuf;
5123         int err = 0;
5124         char errbuf[1024];
5125
5126         assert(zhp->zfs_type == ZFS_TYPE_VOLUME ||
5127             zhp->zfs_type == ZFS_TYPE_FILESYSTEM);
5128
5129 tryagain:
5130
5131         nvbuf = malloc(nvsz);
5132         if (nvbuf == NULL) {
5133                 err = (zfs_error(hdl, EZFS_NOMEM, strerror(errno)));
5134                 goto out;
5135         }
5136
5137         zc.zc_nvlist_dst_size = nvsz;
5138         zc.zc_nvlist_dst = (uintptr_t)nvbuf;
5139
5140         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
5141
5142         if (zfs_ioctl(hdl, ZFS_IOC_GET_FSACL, &zc) != 0) {
5143                 (void) snprintf(errbuf, sizeof (errbuf),
5144                     dgettext(TEXT_DOMAIN, "cannot get permissions on '%s'"),
5145                     zc.zc_name);
5146                 switch (errno) {
5147                 case ENOMEM:
5148                         free(nvbuf);
5149                         nvsz = zc.zc_nvlist_dst_size;
5150                         goto tryagain;
5151
5152                 case ENOTSUP:
5153                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
5154                             "pool must be upgraded"));
5155                         err = zfs_error(hdl, EZFS_BADVERSION, errbuf);
5156                         break;
5157                 case EINVAL:
5158                         err = zfs_error(hdl, EZFS_BADTYPE, errbuf);
5159                         break;
5160                 case ENOENT:
5161                         err = zfs_error(hdl, EZFS_NOENT, errbuf);
5162                         break;
5163                 default:
5164                         err = zfs_standard_error_fmt(hdl, errno, errbuf);
5165                         break;
5166                 }
5167         } else {
5168                 /* success */
5169                 int rc = nvlist_unpack(nvbuf, zc.zc_nvlist_dst_size, nvl, 0);
5170                 if (rc) {
5171                         (void) snprintf(errbuf, sizeof (errbuf), dgettext(
5172                             TEXT_DOMAIN, "cannot get permissions on '%s'"),
5173                             zc.zc_name);
5174                         err = zfs_standard_error_fmt(hdl, rc, errbuf);
5175                 }
5176         }
5177
5178         free(nvbuf);
5179 out:
5180         return (err);
5181 }
5182
5183 int
5184 zfs_set_fsacl(zfs_handle_t *zhp, boolean_t un, nvlist_t *nvl)
5185 {
5186         zfs_cmd_t zc = {"\0"};
5187         libzfs_handle_t *hdl = zhp->zfs_hdl;
5188         char *nvbuf;
5189         char errbuf[1024];
5190         size_t nvsz;
5191         int err;
5192
5193         assert(zhp->zfs_type == ZFS_TYPE_VOLUME ||
5194             zhp->zfs_type == ZFS_TYPE_FILESYSTEM);
5195
5196         err = nvlist_size(nvl, &nvsz, NV_ENCODE_NATIVE);
5197         assert(err == 0);
5198
5199         nvbuf = malloc(nvsz);
5200
5201         err = nvlist_pack(nvl, &nvbuf, &nvsz, NV_ENCODE_NATIVE, 0);
5202         assert(err == 0);
5203
5204         zc.zc_nvlist_src_size = nvsz;
5205         zc.zc_nvlist_src = (uintptr_t)nvbuf;
5206         zc.zc_perm_action = un;
5207
5208         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
5209
5210         if (zfs_ioctl(hdl, ZFS_IOC_SET_FSACL, &zc) != 0) {
5211                 (void) snprintf(errbuf, sizeof (errbuf),
5212                     dgettext(TEXT_DOMAIN, "cannot set permissions on '%s'"),
5213                     zc.zc_name);
5214                 switch (errno) {
5215                 case ENOTSUP:
5216                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
5217                             "pool must be upgraded"));
5218                         err = zfs_error(hdl, EZFS_BADVERSION, errbuf);
5219                         break;
5220                 case EINVAL:
5221                         err = zfs_error(hdl, EZFS_BADTYPE, errbuf);
5222                         break;
5223                 case ENOENT:
5224                         err = zfs_error(hdl, EZFS_NOENT, errbuf);
5225                         break;
5226                 default:
5227                         err = zfs_standard_error_fmt(hdl, errno, errbuf);
5228                         break;
5229                 }
5230         }
5231
5232         free(nvbuf);
5233
5234         return (err);
5235 }
5236
5237 int
5238 zfs_get_holds(zfs_handle_t *zhp, nvlist_t **nvl)
5239 {
5240         int err;
5241         char errbuf[1024];
5242
5243         err = lzc_get_holds(zhp->zfs_name, nvl);
5244
5245         if (err != 0) {
5246                 libzfs_handle_t *hdl = zhp->zfs_hdl;
5247
5248                 (void) snprintf(errbuf, sizeof (errbuf),
5249                     dgettext(TEXT_DOMAIN, "cannot get holds for '%s'"),
5250                     zhp->zfs_name);
5251                 switch (err) {
5252                 case ENOTSUP:
5253                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
5254                             "pool must be upgraded"));
5255                         err = zfs_error(hdl, EZFS_BADVERSION, errbuf);
5256                         break;
5257                 case EINVAL:
5258                         err = zfs_error(hdl, EZFS_BADTYPE, errbuf);
5259                         break;
5260                 case ENOENT:
5261                         err = zfs_error(hdl, EZFS_NOENT, errbuf);
5262                         break;
5263                 default:
5264                         err = zfs_standard_error_fmt(hdl, errno, errbuf);
5265                         break;
5266                 }
5267         }
5268
5269         return (err);
5270 }
5271
5272 /*
5273  * The theory of raidz space accounting
5274  *
5275  * The "referenced" property of RAIDZ vdevs is scaled such that a 128KB block
5276  * will "reference" 128KB, even though it allocates more than that, to store the
5277  * parity information (and perhaps skip sectors). This concept of the
5278  * "referenced" (and other DMU space accounting) being lower than the allocated
5279  * space by a constant factor is called "raidz deflation."
5280  *
5281  * As mentioned above, the constant factor for raidz deflation assumes a 128KB
5282  * block size. However, zvols typically have a much smaller block size (default
5283  * 8KB). These smaller blocks may require proportionally much more parity
5284  * information (and perhaps skip sectors). In this case, the change to the
5285  * "referenced" property may be much more than the logical block size.
5286  *
5287  * Suppose a raidz vdev has 5 disks with ashift=12.  A 128k block may be written
5288  * as follows.
5289  *
5290  * +-------+-------+-------+-------+-------+
5291  * | disk1 | disk2 | disk3 | disk4 | disk5 |
5292  * +-------+-------+-------+-------+-------+
5293  * |  P0   |  D0   |  D8   |  D16  |  D24  |
5294  * |  P1   |  D1   |  D9   |  D17  |  D25  |
5295  * |  P2   |  D2   |  D10  |  D18  |  D26  |
5296  * |  P3   |  D3   |  D11  |  D19  |  D27  |
5297  * |  P4   |  D4   |  D12  |  D20  |  D28  |
5298  * |  P5   |  D5   |  D13  |  D21  |  D29  |
5299  * |  P6   |  D6   |  D14  |  D22  |  D30  |
5300  * |  P7   |  D7   |  D15  |  D23  |  D31  |
5301  * +-------+-------+-------+-------+-------+
5302  *
5303  * Above, notice that 160k was allocated: 8 x 4k parity sectors + 32 x 4k data
5304  * sectors.  The dataset's referenced will increase by 128k and the pool's
5305  * allocated and free properties will be adjusted by 160k.
5306  *
5307  * A 4k block written to the same raidz vdev will require two 4k sectors.  The
5308  * blank cells represent unallocated space.
5309  *
5310  * +-------+-------+-------+-------+-------+
5311  * | disk1 | disk2 | disk3 | disk4 | disk5 |
5312  * +-------+-------+-------+-------+-------+
5313  * |  P0   |  D0   |       |       |       |
5314  * +-------+-------+-------+-------+-------+
5315  *
5316  * Above, notice that the 4k block required one sector for parity and another
5317  * for data.  vdev_raidz_asize() will return 8k and as such the pool's allocated
5318  * and free properties will be adjusted by 8k.  The dataset will not be charged
5319  * 8k.  Rather, it will be charged a value that is scaled according to the
5320  * overhead of the 128k block on the same vdev.  This 8k allocation will be
5321  * charged 8k * 128k / 160k.  128k is from SPA_OLD_MAXBLOCKSIZE and 160k is as
5322  * calculated in the 128k block example above.
5323  *
5324  * Every raidz allocation is sized to be a multiple of nparity+1 sectors.  That
5325  * is, every raidz1 allocation will be a multiple of 2 sectors, raidz2
5326  * allocations are a multiple of 3 sectors, and raidz3 allocations are a
5327  * multiple of of 4 sectors.  When a block does not fill the required number of
5328  * sectors, skip blocks (sectors) are used.
5329  *
5330  * An 8k block being written to a raidz vdev may be written as follows:
5331  *
5332  * +-------+-------+-------+-------+-------+
5333  * | disk1 | disk2 | disk3 | disk4 | disk5 |
5334  * +-------+-------+-------+-------+-------+
5335  * |  P0   |  D0   |  D1   |  S0   |       |
5336  * +-------+-------+-------+-------+-------+
5337  *
5338  * In order to maintain the nparity+1 allocation size, a skip block (S0) was
5339  * added.  For this 8k block, the pool's allocated and free properties are
5340  * adjusted by 16k and the dataset's referenced is increased by 16k * 128k /
5341  * 160k.  Again, 128k is from SPA_OLD_MAXBLOCKSIZE and 160k is as calculated in
5342  * the 128k block example above.
5343  *
5344  * The situation is slightly different for dRAID since the minimum allocation
5345  * size is the full group width.  The same 8K block above would be written as
5346  * follows in a dRAID group:
5347  *
5348  * +-------+-------+-------+-------+-------+
5349  * | disk1 | disk2 | disk3 | disk4 | disk5 |
5350  * +-------+-------+-------+-------+-------+
5351  * |  P0   |  D0   |  D1   |  S0   |  S1   |
5352  * +-------+-------+-------+-------+-------+
5353  *
5354  * Compression may lead to a variety of block sizes being written for the same
5355  * volume or file.  There is no clear way to reserve just the amount of space
5356  * that will be required, so the worst case (no compression) is assumed.
5357  * Note that metadata blocks will typically be compressed, so the reservation
5358  * size returned by zvol_volsize_to_reservation() will generally be slightly
5359  * larger than the maximum that the volume can reference.
5360  */
5361
5362 /*
5363  * Derived from function of same name in module/zfs/vdev_raidz.c.  Returns the
5364  * amount of space (in bytes) that will be allocated for the specified block
5365  * size. Note that the "referenced" space accounted will be less than this, but
5366  * not necessarily equal to "blksize", due to RAIDZ deflation.
5367  */
5368 static uint64_t
5369 vdev_raidz_asize(uint64_t ndisks, uint64_t nparity, uint64_t ashift,
5370     uint64_t blksize)
5371 {
5372         uint64_t asize, ndata;
5373
5374         ASSERT3U(ndisks, >, nparity);
5375         ndata = ndisks - nparity;
5376         asize = ((blksize - 1) >> ashift) + 1;
5377         asize += nparity * ((asize + ndata - 1) / ndata);
5378         asize = roundup(asize, nparity + 1) << ashift;
5379
5380         return (asize);
5381 }
5382
5383 /*
5384  * Derived from function of same name in module/zfs/vdev_draid.c.  Returns the
5385  * amount of space (in bytes) that will be allocated for the specified block
5386  * size.
5387  */
5388 static uint64_t
5389 vdev_draid_asize(uint64_t ndisks, uint64_t nparity, uint64_t ashift,
5390     uint64_t blksize)
5391 {
5392         ASSERT3U(ndisks, >, nparity);
5393         uint64_t ndata = ndisks - nparity;
5394         uint64_t rows = ((blksize - 1) / (ndata << ashift)) + 1;
5395         uint64_t asize = (rows * ndisks) << ashift;
5396
5397         return (asize);
5398 }
5399
5400 /*
5401  * Determine how much space will be allocated if it lands on the most space-
5402  * inefficient top-level vdev.  Returns the size in bytes required to store one
5403  * copy of the volume data.  See theory comment above.
5404  */
5405 static uint64_t
5406 volsize_from_vdevs(zpool_handle_t *zhp, uint64_t nblocks, uint64_t blksize)
5407 {
5408         nvlist_t *config, *tree, **vdevs;
5409         uint_t nvdevs;
5410         uint64_t ret = 0;
5411
5412         config = zpool_get_config(zhp, NULL);
5413         if (nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, &tree) != 0 ||
5414             nvlist_lookup_nvlist_array(tree, ZPOOL_CONFIG_CHILDREN,
5415             &vdevs, &nvdevs) != 0) {
5416                 return (nblocks * blksize);
5417         }
5418
5419         for (int v = 0; v < nvdevs; v++) {
5420                 char *type;
5421                 uint64_t nparity, ashift, asize, tsize;
5422                 uint64_t volsize;
5423
5424                 if (nvlist_lookup_string(vdevs[v], ZPOOL_CONFIG_TYPE,
5425                     &type) != 0)
5426                         continue;
5427
5428                 if (strcmp(type, VDEV_TYPE_RAIDZ) != 0 &&
5429                     strcmp(type, VDEV_TYPE_DRAID) != 0)
5430                         continue;
5431
5432                 if (nvlist_lookup_uint64(vdevs[v],
5433                     ZPOOL_CONFIG_NPARITY, &nparity) != 0)
5434                         continue;
5435
5436                 if (nvlist_lookup_uint64(vdevs[v],
5437                     ZPOOL_CONFIG_ASHIFT, &ashift) != 0)
5438                         continue;
5439
5440                 if (strcmp(type, VDEV_TYPE_RAIDZ) == 0) {
5441                         nvlist_t **disks;
5442                         uint_t ndisks;
5443
5444                         if (nvlist_lookup_nvlist_array(vdevs[v],
5445                             ZPOOL_CONFIG_CHILDREN, &disks, &ndisks) != 0)
5446                                 continue;
5447
5448                         /* allocation size for the "typical" 128k block */
5449                         tsize = vdev_raidz_asize(ndisks, nparity, ashift,
5450                             SPA_OLD_MAXBLOCKSIZE);
5451
5452                         /* allocation size for the blksize block */
5453                         asize = vdev_raidz_asize(ndisks, nparity, ashift,
5454                             blksize);
5455                 } else {
5456                         uint64_t ndata;
5457
5458                         if (nvlist_lookup_uint64(vdevs[v],
5459                             ZPOOL_CONFIG_DRAID_NDATA, &ndata) != 0)
5460                                 continue;
5461
5462                         /* allocation size for the "typical" 128k block */
5463                         tsize = vdev_draid_asize(ndata + nparity, nparity,
5464                             ashift, SPA_OLD_MAXBLOCKSIZE);
5465
5466                         /* allocation size for the blksize block */
5467                         asize = vdev_draid_asize(ndata + nparity, nparity,
5468                             ashift, blksize);
5469                 }
5470
5471                 /*
5472                  * Scale this size down as a ratio of 128k / tsize.
5473                  * See theory statement above.
5474                  */
5475                 volsize = nblocks * asize * SPA_OLD_MAXBLOCKSIZE / tsize;
5476                 if (volsize > ret) {
5477                         ret = volsize;
5478                 }
5479         }
5480
5481         if (ret == 0) {
5482                 ret = nblocks * blksize;
5483         }
5484
5485         return (ret);
5486 }
5487
5488 /*
5489  * Convert the zvol's volume size to an appropriate reservation.  See theory
5490  * comment above.
5491  *
5492  * Note: If this routine is updated, it is necessary to update the ZFS test
5493  * suite's shell version in reservation.shlib.
5494  */
5495 uint64_t
5496 zvol_volsize_to_reservation(zpool_handle_t *zph, uint64_t volsize,
5497     nvlist_t *props)
5498 {
5499         uint64_t numdb;
5500         uint64_t nblocks, volblocksize;
5501         int ncopies;
5502         char *strval;
5503
5504         if (nvlist_lookup_string(props,
5505             zfs_prop_to_name(ZFS_PROP_COPIES), &strval) == 0)
5506                 ncopies = atoi(strval);
5507         else
5508                 ncopies = 1;
5509         if (nvlist_lookup_uint64(props,
5510             zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE),
5511             &volblocksize) != 0)
5512                 volblocksize = ZVOL_DEFAULT_BLOCKSIZE;
5513
5514         nblocks = volsize / volblocksize;
5515         /*
5516          * Metadata defaults to using 128k blocks, not volblocksize blocks.  For
5517          * this reason, only the data blocks are scaled based on vdev config.
5518          */
5519         volsize = volsize_from_vdevs(zph, nblocks, volblocksize);
5520
5521         /* start with metadnode L0-L6 */
5522         numdb = 7;
5523         /* calculate number of indirects */
5524         while (nblocks > 1) {
5525                 nblocks += DNODES_PER_LEVEL - 1;
5526                 nblocks /= DNODES_PER_LEVEL;
5527                 numdb += nblocks;
5528         }
5529         numdb *= MIN(SPA_DVAS_PER_BP, ncopies + 1);
5530         volsize *= ncopies;
5531         /*
5532          * this is exactly DN_MAX_INDBLKSHIFT when metadata isn't
5533          * compressed, but in practice they compress down to about
5534          * 1100 bytes
5535          */
5536         numdb *= 1ULL << DN_MAX_INDBLKSHIFT;
5537         volsize += numdb;
5538         return (volsize);
5539 }
5540
5541 /*
5542  * Wait for the given activity and return the status of the wait (whether or not
5543  * any waiting was done) in the 'waited' parameter. Non-existent fses are
5544  * reported via the 'missing' parameter, rather than by printing an error
5545  * message. This is convenient when this function is called in a loop over a
5546  * long period of time (as it is, for example, by zfs's wait cmd). In that
5547  * scenario, a fs being exported or destroyed should be considered a normal
5548  * event, so we don't want to print an error when we find that the fs doesn't
5549  * exist.
5550  */
5551 int
5552 zfs_wait_status(zfs_handle_t *zhp, zfs_wait_activity_t activity,
5553     boolean_t *missing, boolean_t *waited)
5554 {
5555         int error = lzc_wait_fs(zhp->zfs_name, activity, waited);
5556         *missing = (error == ENOENT);
5557         if (*missing)
5558                 return (0);
5559
5560         if (error != 0) {
5561                 (void) zfs_standard_error_fmt(zhp->zfs_hdl, error,
5562                     dgettext(TEXT_DOMAIN, "error waiting in fs '%s'"),
5563                     zhp->zfs_name);
5564         }
5565
5566         return (error);
5567 }