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