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 https://opensource.org/licenses/CDDL-1.0.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21
  22 /*
  23  * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
  24  * Copyright 2019 Joyent, Inc.
  25  * Copyright (c) 2011, 2020 by Delphix. All rights reserved.
  26  * Copyright (c) 2012 DEY Storage Systems, Inc.  All rights reserved.
  27  * Copyright (c) 2012 Pawel Jakub Dawidek <pawel@dawidek.net>.
  28  * Copyright (c) 2013 Martin Matuska. All rights reserved.
  29  * Copyright (c) 2013 Steven Hartland. All rights reserved.
  30  * Copyright 2017 Nexenta Systems, Inc.
  31  * Copyright 2016 Igor Kozhukhov <ikozhukhov@gmail.com>
  32  * Copyright 2017-2018 RackTop Systems.
  33  * Copyright (c) 2019 Datto Inc.
  34  * Copyright (c) 2019, loli10K <ezomori.nozomu@gmail.com>
  35  * Copyright (c) 2021 Matt Fiddaman
  36  */
  37
  38 #include <ctype.h>
  39 #include <errno.h>
  40 #include <libintl.h>
  41 #include <stdio.h>
  42 #include <stdlib.h>
  43 #include <strings.h>
  44 #include <unistd.h>
  45 #include <stddef.h>
  46 #include <zone.h>
  47 #include <fcntl.h>
  48 #include <sys/mntent.h>
  49 #include <sys/mount.h>
  50 #include <pwd.h>
  51 #include <grp.h>
  52 #ifdef HAVE_IDMAP
  53 #include <idmap.h>
  54 #include <aclutils.h>
  55 #include <directory.h>
  56 #endif /* HAVE_IDMAP */
  57
  58 #include <sys/dnode.h>
  59 #include <sys/spa.h>
  60 #include <sys/zap.h>
  61 #include <sys/dsl_crypt.h>
  62 #include <libzfs.h>
  63 #include <libzutil.h>
  64
  65 #include "zfs_namecheck.h"
  66 #include "zfs_prop.h"
  67 #include "libzfs_impl.h"
  68 #include "zfs_deleg.h"
  69
  70 static __thread struct passwd gpwd;
  71 static __thread struct group ggrp;
  72 static __thread char rpbuf[2048];
  73
  74 static int userquota_propname_decode(const char *propname, boolean_t zoned,
  75     zfs_userquota_prop_t *typep, char *domain, int domainlen, uint64_t *ridp);
  76
  77 /*
  78  * Given a single type (not a mask of types), return the type in a human
  79  * readable form.
  80  */
  81 const char *
  82 zfs_type_to_name(zfs_type_t type)
  83 {
  84         switch (type) {
  85         case ZFS_TYPE_FILESYSTEM:
  86                 return (dgettext(TEXT_DOMAIN, "filesystem"));
  87         case ZFS_TYPE_SNAPSHOT:
  88                 return (dgettext(TEXT_DOMAIN, "snapshot"));
  89         case ZFS_TYPE_VOLUME:
  90                 return (dgettext(TEXT_DOMAIN, "volume"));
  91         case ZFS_TYPE_POOL:
  92                 return (dgettext(TEXT_DOMAIN, "pool"));
  93         case ZFS_TYPE_BOOKMARK:
  94                 return (dgettext(TEXT_DOMAIN, "bookmark"));
  95         default:
  96                 assert(!"unhandled zfs_type_t");
  97         }
  98
  99         return (NULL);
 100 }
 101
 102 /*
 103  * Validate a ZFS path.  This is used even before trying to open the dataset, to
 104  * provide a more meaningful error message.  We call zfs_error_aux() to
 105  * explain exactly why the name was not valid.
 106  */
 107 int
 108 zfs_validate_name(libzfs_handle_t *hdl, const char *path, int type,
 109     boolean_t modifying)
 110 {
 111         namecheck_err_t why;
 112         char what;
 113
 114         if (!(type & ZFS_TYPE_SNAPSHOT) && strchr(path, '@') != NULL) {
 115                 if (hdl != NULL)
 116                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 117                             "snapshot delimiter '@' is not expected here"));
 118                 return (0);
 119         }
 120
 121         if (type == ZFS_TYPE_SNAPSHOT && strchr(path, '@') == NULL) {
 122                 if (hdl != NULL)
 123                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 124                             "missing '@' delimiter in snapshot name"));
 125                 return (0);
 126         }
 127
 128         if (!(type & ZFS_TYPE_BOOKMARK) && strchr(path, '#') != NULL) {
 129                 if (hdl != NULL)
 130                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 131                             "bookmark delimiter '#' is not expected here"));
 132                 return (0);
 133         }
 134
 135         if (type == ZFS_TYPE_BOOKMARK && strchr(path, '#') == NULL) {
 136                 if (hdl != NULL)
 137                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 138                             "missing '#' delimiter in bookmark name"));
 139                 return (0);
 140         }
 141
 142         if (modifying && strchr(path, '%') != NULL) {
 143                 if (hdl != NULL)
 144                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 145                             "invalid character %c in name"), '%');
 146                 return (0);
 147         }
 148
 149         if (entity_namecheck(path, &why, &what) != 0) {
 150                 if (hdl != NULL) {
 151                         switch (why) {
 152                         case NAME_ERR_TOOLONG:
 153                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 154                                     "name is too long"));
 155                                 break;
 156
 157                         case NAME_ERR_LEADING_SLASH:
 158                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 159                                     "leading slash in name"));
 160                                 break;
 161
 162                         case NAME_ERR_EMPTY_COMPONENT:
 163                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 164                                     "empty component or misplaced '@'"
 165                                     " or '#' delimiter in name"));
 166                                 break;
 167
 168                         case NAME_ERR_TRAILING_SLASH:
 169                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 170                                     "trailing slash in name"));
 171                                 break;
 172
 173                         case NAME_ERR_INVALCHAR:
 174                                 zfs_error_aux(hdl,
 175                                     dgettext(TEXT_DOMAIN, "invalid character "
 176                                     "'%c' in name"), what);
 177                                 break;
 178
 179                         case NAME_ERR_MULTIPLE_DELIMITERS:
 180                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 181                                     "multiple '@' and/or '#' delimiters in "
 182                                     "name"));
 183                                 break;
 184
 185                         case NAME_ERR_NOLETTER:
 186                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 187                                     "pool doesn't begin with a letter"));
 188                                 break;
 189
 190                         case NAME_ERR_RESERVED:
 191                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 192                                     "name is reserved"));
 193                                 break;
 194
 195                         case NAME_ERR_DISKLIKE:
 196                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 197                                     "reserved disk name"));
 198                                 break;
 199
 200                         case NAME_ERR_SELF_REF:
 201                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 202                                     "self reference, '.' is found in name"));
 203                                 break;
 204
 205                         case NAME_ERR_PARENT_REF:
 206                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 207                                     "parent reference, '..' is found in name"));
 208                                 break;
 209
 210                         default:
 211                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 212                                     "(%d) not defined"), why);
 213                                 break;
 214                         }
 215                 }
 216
 217                 return (0);
 218         }
 219
 220         return (-1);
 221 }
 222
 223 int
 224 zfs_name_valid(const char *name, zfs_type_t type)
 225 {
 226         if (type == ZFS_TYPE_POOL)
 227                 return (zpool_name_valid(NULL, B_FALSE, name));
 228         return (zfs_validate_name(NULL, name, type, B_FALSE));
 229 }
 230
 231 /*
 232  * This function takes the raw DSL properties, and filters out the user-defined
 233  * properties into a separate nvlist.
 234  */
 235 static nvlist_t *
 236 process_user_props(zfs_handle_t *zhp, nvlist_t *props)
 237 {
 238         libzfs_handle_t *hdl = zhp->zfs_hdl;
 239         nvpair_t *elem;
 240         nvlist_t *nvl;
 241
 242         if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0) != 0) {
 243                 (void) no_memory(hdl);
 244                 return (NULL);
 245         }
 246
 247         elem = NULL;
 248         while ((elem = nvlist_next_nvpair(props, elem)) != NULL) {
 249                 if (!zfs_prop_user(nvpair_name(elem)))
 250                         continue;
 251
 252                 nvlist_t *propval = fnvpair_value_nvlist(elem);
 253                 if (nvlist_add_nvlist(nvl, nvpair_name(elem), propval) != 0) {
 254                         nvlist_free(nvl);
 255                         (void) no_memory(hdl);
 256                         return (NULL);
 257                 }
 258         }
 259
 260         return (nvl);
 261 }
 262
 263 static zpool_handle_t *
 264 zpool_add_handle(zfs_handle_t *zhp, const char *pool_name)
 265 {
 266         libzfs_handle_t *hdl = zhp->zfs_hdl;
 267         zpool_handle_t *zph;
 268
 269         if ((zph = zpool_open_canfail(hdl, pool_name)) != NULL) {
 270                 if (hdl->libzfs_pool_handles != NULL)
 271                         zph->zpool_next = hdl->libzfs_pool_handles;
 272                 hdl->libzfs_pool_handles = zph;
 273         }
 274         return (zph);
 275 }
 276
 277 static zpool_handle_t *
 278 zpool_find_handle(zfs_handle_t *zhp, const char *pool_name, int len)
 279 {
 280         libzfs_handle_t *hdl = zhp->zfs_hdl;
 281         zpool_handle_t *zph = hdl->libzfs_pool_handles;
 282
 283         while ((zph != NULL) &&
 284             (strncmp(pool_name, zpool_get_name(zph), len) != 0))
 285                 zph = zph->zpool_next;
 286         return (zph);
 287 }
 288
 289 /*
 290  * Returns a handle to the pool that contains the provided dataset.
 291  * If a handle to that pool already exists then that handle is returned.
 292  * Otherwise, a new handle is created and added to the list of handles.
 293  */
 294 static zpool_handle_t *
 295 zpool_handle(zfs_handle_t *zhp)
 296 {
 297         char *pool_name;
 298         int len;
 299         zpool_handle_t *zph;
 300
 301         len = strcspn(zhp->zfs_name, "/@#") + 1;
 302         pool_name = zfs_alloc(zhp->zfs_hdl, len);
 303         (void) strlcpy(pool_name, zhp->zfs_name, len);
 304
 305         zph = zpool_find_handle(zhp, pool_name, len);
 306         if (zph == NULL)
 307                 zph = zpool_add_handle(zhp, pool_name);
 308
 309         free(pool_name);
 310         return (zph);
 311 }
 312
 313 void
 314 zpool_free_handles(libzfs_handle_t *hdl)
 315 {
 316         zpool_handle_t *next, *zph = hdl->libzfs_pool_handles;
 317
 318         while (zph != NULL) {
 319                 next = zph->zpool_next;
 320                 zpool_close(zph);
 321                 zph = next;
 322         }
 323         hdl->libzfs_pool_handles = NULL;
 324 }
 325
 326 /*
 327  * Utility function to gather stats (objset and zpl) for the given object.
 328  */
 329 static int
 330 get_stats_ioctl(zfs_handle_t *zhp, zfs_cmd_t *zc)
 331 {
 332         libzfs_handle_t *hdl = zhp->zfs_hdl;
 333
 334         (void) strlcpy(zc->zc_name, zhp->zfs_name, sizeof (zc->zc_name));
 335
 336         while (zfs_ioctl(hdl, ZFS_IOC_OBJSET_STATS, zc) != 0) {
 337                 if (errno == ENOMEM)
 338                         zcmd_expand_dst_nvlist(hdl, zc);
 339                 else
 340                         return (-1);
 341         }
 342         return (0);
 343 }
 344
 345 /*
 346  * Utility function to get the received properties of the given object.
 347  */
 348 static int
 349 get_recvd_props_ioctl(zfs_handle_t *zhp)
 350 {
 351         libzfs_handle_t *hdl = zhp->zfs_hdl;
 352         nvlist_t *recvdprops;
 353         zfs_cmd_t zc = {"\0"};
 354         int err;
 355
 356         zcmd_alloc_dst_nvlist(hdl, &zc, 0);
 357
 358         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
 359
 360         while (zfs_ioctl(hdl, ZFS_IOC_OBJSET_RECVD_PROPS, &zc) != 0) {
 361                 if (errno == ENOMEM)
 362                         zcmd_expand_dst_nvlist(hdl, &zc);
 363                 else {
 364                         zcmd_free_nvlists(&zc);
 365                         return (-1);
 366                 }
 367         }
 368
 369         err = zcmd_read_dst_nvlist(zhp->zfs_hdl, &zc, &recvdprops);
 370         zcmd_free_nvlists(&zc);
 371         if (err != 0)
 372                 return (-1);
 373
 374         nvlist_free(zhp->zfs_recvd_props);
 375         zhp->zfs_recvd_props = recvdprops;
 376
 377         return (0);
 378 }
 379
 380 static int
 381 put_stats_zhdl(zfs_handle_t *zhp, zfs_cmd_t *zc)
 382 {
 383         nvlist_t *allprops, *userprops;
 384
 385         zhp->zfs_dmustats = zc->zc_objset_stats; /* structure assignment */
 386
 387         if (zcmd_read_dst_nvlist(zhp->zfs_hdl, zc, &allprops) != 0) {
 388                 return (-1);
 389         }
 390
 391         /*
 392          * XXX Why do we store the user props separately, in addition to
 393          * storing them in zfs_props?
 394          */
 395         if ((userprops = process_user_props(zhp, allprops)) == NULL) {
 396                 nvlist_free(allprops);
 397                 return (-1);
 398         }
 399
 400         nvlist_free(zhp->zfs_props);
 401         nvlist_free(zhp->zfs_user_props);
 402
 403         zhp->zfs_props = allprops;
 404         zhp->zfs_user_props = userprops;
 405
 406         return (0);
 407 }
 408
 409 static int
 410 get_stats(zfs_handle_t *zhp)
 411 {
 412         int rc = 0;
 413         zfs_cmd_t zc = {"\0"};
 414
 415         zcmd_alloc_dst_nvlist(zhp->zfs_hdl, &zc, 0);
 416
 417         if (get_stats_ioctl(zhp, &zc) != 0)
 418                 rc = -1;
 419         else if (put_stats_zhdl(zhp, &zc) != 0)
 420                 rc = -1;
 421         zcmd_free_nvlists(&zc);
 422         return (rc);
 423 }
 424
 425 /*
 426  * Refresh the properties currently stored in the handle.
 427  */
 428 void
 429 zfs_refresh_properties(zfs_handle_t *zhp)
 430 {
 431         (void) get_stats(zhp);
 432 }
 433
 434 /*
 435  * Makes a handle from the given dataset name.  Used by zfs_open() and
 436  * zfs_iter_* to create child handles on the fly.
 437  */
 438 static int
 439 make_dataset_handle_common(zfs_handle_t *zhp, zfs_cmd_t *zc)
 440 {
 441         if (put_stats_zhdl(zhp, zc) != 0)
 442                 return (-1);
 443
 444         /*
 445          * We've managed to open the dataset and gather statistics.  Determine
 446          * the high-level type.
 447          */
 448         if (zhp->zfs_dmustats.dds_type == DMU_OST_ZVOL) {
 449                 zhp->zfs_head_type = ZFS_TYPE_VOLUME;
 450         } else if (zhp->zfs_dmustats.dds_type == DMU_OST_ZFS) {
 451                 zhp->zfs_head_type = ZFS_TYPE_FILESYSTEM;
 452         } else if (zhp->zfs_dmustats.dds_type == DMU_OST_OTHER) {
 453                 errno = EINVAL;
 454                 return (-1);
 455         } else if (zhp->zfs_dmustats.dds_inconsistent) {
 456                 errno = EBUSY;
 457                 return (-1);
 458         } else {
 459                 abort();
 460         }
 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         zcmd_alloc_dst_nvlist(hdl, &zc, 0);
 490
 491         if (get_stats_ioctl(zhp, &zc) == -1) {
 492                 zcmd_free_nvlists(&zc);
 493                 free(zhp);
 494                 return (NULL);
 495         }
 496         if (make_dataset_handle_common(zhp, &zc) == -1) {
 497                 free(zhp);
 498                 zhp = NULL;
 499         }
 500         zcmd_free_nvlists(&zc);
 501         return (zhp);
 502 }
 503
 504 zfs_handle_t *
 505 make_dataset_handle_zc(libzfs_handle_t *hdl, zfs_cmd_t *zc)
 506 {
 507         zfs_handle_t *zhp = calloc(1, sizeof (zfs_handle_t));
 508
 509         if (zhp == NULL)
 510                 return (NULL);
 511
 512         zhp->zfs_hdl = hdl;
 513         (void) strlcpy(zhp->zfs_name, zc->zc_name, sizeof (zhp->zfs_name));
 514         if (make_dataset_handle_common(zhp, zc) == -1) {
 515                 free(zhp);
 516                 return (NULL);
 517         }
 518         return (zhp);
 519 }
 520
 521 zfs_handle_t *
 522 make_dataset_simple_handle_zc(zfs_handle_t *pzhp, zfs_cmd_t *zc)
 523 {
 524         zfs_handle_t *zhp = calloc(1, sizeof (zfs_handle_t));
 525
 526         if (zhp == NULL)
 527                 return (NULL);
 528
 529         zhp->zfs_hdl = pzhp->zfs_hdl;
 530         (void) strlcpy(zhp->zfs_name, zc->zc_name, sizeof (zhp->zfs_name));
 531         zhp->zfs_head_type = pzhp->zfs_type;
 532         zhp->zfs_type = ZFS_TYPE_SNAPSHOT;
 533         zhp->zpool_hdl = zpool_handle(zhp);
 534
 535         if (zc->zc_objset_stats.dds_creation_txg != 0) {
 536                 /* structure assignment */
 537                 zhp->zfs_dmustats = zc->zc_objset_stats;
 538         } else {
 539                 if (get_stats_ioctl(zhp, zc) == -1) {
 540                         zcmd_free_nvlists(zc);
 541                         free(zhp);
 542                         return (NULL);
 543                 }
 544                 if (make_dataset_handle_common(zhp, zc) == -1) {
 545                         zcmd_free_nvlists(zc);
 546                         free(zhp);
 547                         return (NULL);
 548                 }
 549         }
 550
 551         if (zhp->zfs_dmustats.dds_is_snapshot ||
 552             strchr(zc->zc_name, '@') != NULL)
 553                 zhp->zfs_type = ZFS_TYPE_SNAPSHOT;
 554         else if (zhp->zfs_dmustats.dds_type == DMU_OST_ZVOL)
 555                 zhp->zfs_type = ZFS_TYPE_VOLUME;
 556         else if (zhp->zfs_dmustats.dds_type == DMU_OST_ZFS)
 557                 zhp->zfs_type = ZFS_TYPE_FILESYSTEM;
 558
 559         return (zhp);
 560 }
 561
 562 zfs_handle_t *
 563 zfs_handle_dup(zfs_handle_t *zhp_orig)
 564 {
 565         zfs_handle_t *zhp = calloc(1, sizeof (zfs_handle_t));
 566
 567         if (zhp == NULL)
 568                 return (NULL);
 569
 570         zhp->zfs_hdl = zhp_orig->zfs_hdl;
 571         zhp->zpool_hdl = zhp_orig->zpool_hdl;
 572         (void) strlcpy(zhp->zfs_name, zhp_orig->zfs_name,
 573             sizeof (zhp->zfs_name));
 574         zhp->zfs_type = zhp_orig->zfs_type;
 575         zhp->zfs_head_type = zhp_orig->zfs_head_type;
 576         zhp->zfs_dmustats = zhp_orig->zfs_dmustats;
 577         if (zhp_orig->zfs_props != NULL) {
 578                 if (nvlist_dup(zhp_orig->zfs_props, &zhp->zfs_props, 0) != 0) {
 579                         (void) no_memory(zhp->zfs_hdl);
 580                         zfs_close(zhp);
 581                         return (NULL);
 582                 }
 583         }
 584         if (zhp_orig->zfs_user_props != NULL) {
 585                 if (nvlist_dup(zhp_orig->zfs_user_props,
 586                     &zhp->zfs_user_props, 0) != 0) {
 587                         (void) no_memory(zhp->zfs_hdl);
 588                         zfs_close(zhp);
 589                         return (NULL);
 590                 }
 591         }
 592         if (zhp_orig->zfs_recvd_props != NULL) {
 593                 if (nvlist_dup(zhp_orig->zfs_recvd_props,
 594                     &zhp->zfs_recvd_props, 0)) {
 595                         (void) no_memory(zhp->zfs_hdl);
 596                         zfs_close(zhp);
 597                         return (NULL);
 598                 }
 599         }
 600         zhp->zfs_mntcheck = zhp_orig->zfs_mntcheck;
 601         if (zhp_orig->zfs_mntopts != NULL) {
 602                 zhp->zfs_mntopts = zfs_strdup(zhp_orig->zfs_hdl,
 603                     zhp_orig->zfs_mntopts);
 604         }
 605         zhp->zfs_props_table = zhp_orig->zfs_props_table;
 606         return (zhp);
 607 }
 608
 609 boolean_t
 610 zfs_bookmark_exists(const char *path)
 611 {
 612         nvlist_t *bmarks;
 613         nvlist_t *props;
 614         char fsname[ZFS_MAX_DATASET_NAME_LEN];
 615         char *bmark_name;
 616         char *pound;
 617         int err;
 618         boolean_t rv;
 619
 620         (void) strlcpy(fsname, path, sizeof (fsname));
 621         pound = strchr(fsname, '#');
 622         if (pound == NULL)
 623                 return (B_FALSE);
 624
 625         *pound = '\0';
 626         bmark_name = pound + 1;
 627         props = fnvlist_alloc();
 628         err = lzc_get_bookmarks(fsname, props, &bmarks);
 629         nvlist_free(props);
 630         if (err != 0) {
 631                 nvlist_free(bmarks);
 632                 return (B_FALSE);
 633         }
 634
 635         rv = nvlist_exists(bmarks, bmark_name);
 636         nvlist_free(bmarks);
 637         return (rv);
 638 }
 639
 640 zfs_handle_t *
 641 make_bookmark_handle(zfs_handle_t *parent, const char *path,
 642     nvlist_t *bmark_props)
 643 {
 644         zfs_handle_t *zhp = calloc(1, sizeof (zfs_handle_t));
 645
 646         if (zhp == NULL)
 647                 return (NULL);
 648
 649         /* Fill in the name. */
 650         zhp->zfs_hdl = parent->zfs_hdl;
 651         (void) strlcpy(zhp->zfs_name, path, sizeof (zhp->zfs_name));
 652
 653         /* Set the property lists. */
 654         if (nvlist_dup(bmark_props, &zhp->zfs_props, 0) != 0) {
 655                 free(zhp);
 656                 return (NULL);
 657         }
 658
 659         /* Set the types. */
 660         zhp->zfs_head_type = parent->zfs_head_type;
 661         zhp->zfs_type = ZFS_TYPE_BOOKMARK;
 662
 663         if ((zhp->zpool_hdl = zpool_handle(zhp)) == NULL) {
 664                 nvlist_free(zhp->zfs_props);
 665                 free(zhp);
 666                 return (NULL);
 667         }
 668
 669         return (zhp);
 670 }
 671
 672 struct zfs_open_bookmarks_cb_data {
 673         const char *path;
 674         zfs_handle_t *zhp;
 675 };
 676
 677 static int
 678 zfs_open_bookmarks_cb(zfs_handle_t *zhp, void *data)
 679 {
 680         struct zfs_open_bookmarks_cb_data *dp = data;
 681
 682         /*
 683          * Is it the one we are looking for?
 684          */
 685         if (strcmp(dp->path, zfs_get_name(zhp)) == 0) {
 686                 /*
 687                  * We found it.  Save it and let the caller know we are done.
 688                  */
 689                 dp->zhp = zhp;
 690                 return (EEXIST);
 691         }
 692
 693         /*
 694          * Not found.  Close the handle and ask for another one.
 695          */
 696         zfs_close(zhp);
 697         return (0);
 698 }
 699
 700 /*
 701  * Opens the given snapshot, bookmark, filesystem, or volume.   The 'types'
 702  * argument is a mask of acceptable types.  The function will print an
 703  * appropriate error message and return NULL if it can't be opened.
 704  */
 705 zfs_handle_t *
 706 zfs_open(libzfs_handle_t *hdl, const char *path, int types)
 707 {
 708         zfs_handle_t *zhp;
 709         char errbuf[ERRBUFLEN];
 710         char *bookp;
 711
 712         (void) snprintf(errbuf, sizeof (errbuf),
 713             dgettext(TEXT_DOMAIN, "cannot open '%s'"), path);
 714
 715         /*
 716          * Validate the name before we even try to open it.
 717          */
 718         if (!zfs_validate_name(hdl, path, types, B_FALSE)) {
 719                 (void) zfs_error(hdl, EZFS_INVALIDNAME, errbuf);
 720                 errno = EINVAL;
 721                 return (NULL);
 722         }
 723
 724         /*
 725          * Bookmarks needs to be handled separately.
 726          */
 727         bookp = strchr(path, '#');
 728         if (bookp == NULL) {
 729                 /*
 730                  * Try to get stats for the dataset, which will tell us if it
 731                  * exists.
 732                  */
 733                 errno = 0;
 734                 if ((zhp = make_dataset_handle(hdl, path)) == NULL) {
 735                         (void) zfs_standard_error(hdl, errno, errbuf);
 736                         return (NULL);
 737                 }
 738         } else {
 739                 char dsname[ZFS_MAX_DATASET_NAME_LEN];
 740                 zfs_handle_t *pzhp;
 741                 struct zfs_open_bookmarks_cb_data cb_data = {path, NULL};
 742
 743                 /*
 744                  * We need to cut out '#' and everything after '#'
 745                  * to get the parent dataset name only.
 746                  */
 747                 assert(bookp - path < sizeof (dsname));
 748                 (void) strlcpy(dsname, path,
 749                     MIN(sizeof (dsname), bookp - path + 1));
 750
 751                 /*
 752                  * Create handle for the parent dataset.
 753                  */
 754                 errno = 0;
 755                 if ((pzhp = make_dataset_handle(hdl, dsname)) == NULL) {
 756                         (void) zfs_standard_error(hdl, errno, errbuf);
 757                         return (NULL);
 758                 }
 759
 760                 /*
 761                  * Iterate bookmarks to find the right one.
 762                  */
 763                 errno = 0;
 764                 if ((zfs_iter_bookmarks_v2(pzhp, 0, zfs_open_bookmarks_cb,
 765                     &cb_data) == 0) && (cb_data.zhp == NULL)) {
 766                         (void) zfs_error(hdl, EZFS_NOENT, errbuf);
 767                         zfs_close(pzhp);
 768                         errno = ENOENT;
 769                         return (NULL);
 770                 }
 771                 if (cb_data.zhp == NULL) {
 772                         (void) zfs_standard_error(hdl, errno, errbuf);
 773                         zfs_close(pzhp);
 774                         return (NULL);
 775                 }
 776                 zhp = cb_data.zhp;
 777
 778                 /*
 779                  * Cleanup.
 780                  */
 781                 zfs_close(pzhp);
 782         }
 783
 784         if (!(types & zhp->zfs_type)) {
 785                 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf);
 786                 zfs_close(zhp);
 787                 errno = EINVAL;
 788                 return (NULL);
 789         }
 790
 791         return (zhp);
 792 }
 793
 794 /*
 795  * Release a ZFS handle.  Nothing to do but free the associated memory.
 796  */
 797 void
 798 zfs_close(zfs_handle_t *zhp)
 799 {
 800         if (zhp->zfs_mntopts)
 801                 free(zhp->zfs_mntopts);
 802         nvlist_free(zhp->zfs_props);
 803         nvlist_free(zhp->zfs_user_props);
 804         nvlist_free(zhp->zfs_recvd_props);
 805         free(zhp);
 806 }
 807
 808 typedef struct mnttab_node {
 809         struct mnttab mtn_mt;
 810         avl_node_t mtn_node;
 811 } mnttab_node_t;
 812
 813 static int
 814 libzfs_mnttab_cache_compare(const void *arg1, const void *arg2)
 815 {
 816         const mnttab_node_t *mtn1 = (const mnttab_node_t *)arg1;
 817         const mnttab_node_t *mtn2 = (const mnttab_node_t *)arg2;
 818         int rv;
 819
 820         rv = strcmp(mtn1->mtn_mt.mnt_special, mtn2->mtn_mt.mnt_special);
 821
 822         return (TREE_ISIGN(rv));
 823 }
 824
 825 void
 826 libzfs_mnttab_init(libzfs_handle_t *hdl)
 827 {
 828         pthread_mutex_init(&hdl->libzfs_mnttab_cache_lock, NULL);
 829         assert(avl_numnodes(&hdl->libzfs_mnttab_cache) == 0);
 830         avl_create(&hdl->libzfs_mnttab_cache, libzfs_mnttab_cache_compare,
 831             sizeof (mnttab_node_t), offsetof(mnttab_node_t, mtn_node));
 832 }
 833
 834 static int
 835 libzfs_mnttab_update(libzfs_handle_t *hdl)
 836 {
 837         FILE *mnttab;
 838         struct mnttab entry;
 839
 840         if ((mnttab = fopen(MNTTAB, "re")) == NULL)
 841                 return (ENOENT);
 842
 843         while (getmntent(mnttab, &entry) == 0) {
 844                 mnttab_node_t *mtn;
 845                 avl_index_t where;
 846
 847                 if (strcmp(entry.mnt_fstype, MNTTYPE_ZFS) != 0)
 848                         continue;
 849
 850                 mtn = zfs_alloc(hdl, sizeof (mnttab_node_t));
 851                 mtn->mtn_mt.mnt_special = zfs_strdup(hdl, entry.mnt_special);
 852                 mtn->mtn_mt.mnt_mountp = zfs_strdup(hdl, entry.mnt_mountp);
 853                 mtn->mtn_mt.mnt_fstype = zfs_strdup(hdl, entry.mnt_fstype);
 854                 mtn->mtn_mt.mnt_mntopts = zfs_strdup(hdl, entry.mnt_mntopts);
 855
 856                 /* Exclude duplicate mounts */
 857                 if (avl_find(&hdl->libzfs_mnttab_cache, mtn, &where) != NULL) {
 858                         free(mtn->mtn_mt.mnt_special);
 859                         free(mtn->mtn_mt.mnt_mountp);
 860                         free(mtn->mtn_mt.mnt_fstype);
 861                         free(mtn->mtn_mt.mnt_mntopts);
 862                         free(mtn);
 863                         continue;
 864                 }
 865
 866                 avl_add(&hdl->libzfs_mnttab_cache, mtn);
 867         }
 868
 869         (void) fclose(mnttab);
 870         return (0);
 871 }
 872
 873 void
 874 libzfs_mnttab_fini(libzfs_handle_t *hdl)
 875 {
 876         void *cookie = NULL;
 877         mnttab_node_t *mtn;
 878
 879         while ((mtn = avl_destroy_nodes(&hdl->libzfs_mnttab_cache, &cookie))
 880             != NULL) {
 881                 free(mtn->mtn_mt.mnt_special);
 882                 free(mtn->mtn_mt.mnt_mountp);
 883                 free(mtn->mtn_mt.mnt_fstype);
 884                 free(mtn->mtn_mt.mnt_mntopts);
 885                 free(mtn);
 886         }
 887         avl_destroy(&hdl->libzfs_mnttab_cache);
 888         (void) pthread_mutex_destroy(&hdl->libzfs_mnttab_cache_lock);
 889 }
 890
 891 void
 892 libzfs_mnttab_cache(libzfs_handle_t *hdl, boolean_t enable)
 893 {
 894         hdl->libzfs_mnttab_enable = enable;
 895 }
 896
 897 int
 898 libzfs_mnttab_find(libzfs_handle_t *hdl, const char *fsname,
 899     struct mnttab *entry)
 900 {
 901         FILE *mnttab;
 902         mnttab_node_t find;
 903         mnttab_node_t *mtn;
 904         int ret = ENOENT;
 905
 906         if (!hdl->libzfs_mnttab_enable) {
 907                 struct mnttab srch = { 0 };
 908
 909                 if (avl_numnodes(&hdl->libzfs_mnttab_cache))
 910                         libzfs_mnttab_fini(hdl);
 911
 912                 if ((mnttab = fopen(MNTTAB, "re")) == NULL)
 913                         return (ENOENT);
 914
 915                 srch.mnt_special = (char *)fsname;
 916                 srch.mnt_fstype = (char *)MNTTYPE_ZFS;
 917                 ret = getmntany(mnttab, entry, &srch) ? ENOENT : 0;
 918                 (void) fclose(mnttab);
 919                 return (ret);
 920         }
 921
 922         pthread_mutex_lock(&hdl->libzfs_mnttab_cache_lock);
 923         if (avl_numnodes(&hdl->libzfs_mnttab_cache) == 0) {
 924                 int error;
 925
 926                 if ((error = libzfs_mnttab_update(hdl)) != 0) {
 927                         pthread_mutex_unlock(&hdl->libzfs_mnttab_cache_lock);
 928                         return (error);
 929                 }
 930         }
 931
 932         find.mtn_mt.mnt_special = (char *)fsname;
 933         mtn = avl_find(&hdl->libzfs_mnttab_cache, &find, NULL);
 934         if (mtn) {
 935                 *entry = mtn->mtn_mt;
 936                 ret = 0;
 937         }
 938         pthread_mutex_unlock(&hdl->libzfs_mnttab_cache_lock);
 939         return (ret);
 940 }
 941
 942 void
 943 libzfs_mnttab_add(libzfs_handle_t *hdl, const char *special,
 944     const char *mountp, const char *mntopts)
 945 {
 946         mnttab_node_t *mtn;
 947
 948         pthread_mutex_lock(&hdl->libzfs_mnttab_cache_lock);
 949         if (avl_numnodes(&hdl->libzfs_mnttab_cache) != 0) {
 950                 mtn = zfs_alloc(hdl, sizeof (mnttab_node_t));
 951                 mtn->mtn_mt.mnt_special = zfs_strdup(hdl, special);
 952                 mtn->mtn_mt.mnt_mountp = zfs_strdup(hdl, mountp);
 953                 mtn->mtn_mt.mnt_fstype = zfs_strdup(hdl, MNTTYPE_ZFS);
 954                 mtn->mtn_mt.mnt_mntopts = zfs_strdup(hdl, mntopts);
 955                 /*
 956                  * Another thread may have already added this entry
 957                  * via libzfs_mnttab_update. If so we should skip it.
 958                  */
 959                 if (avl_find(&hdl->libzfs_mnttab_cache, mtn, NULL) != NULL) {
 960                         free(mtn->mtn_mt.mnt_special);
 961                         free(mtn->mtn_mt.mnt_mountp);
 962                         free(mtn->mtn_mt.mnt_fstype);
 963                         free(mtn->mtn_mt.mnt_mntopts);
 964                         free(mtn);
 965                 } else {
 966                         avl_add(&hdl->libzfs_mnttab_cache, mtn);
 967                 }
 968         }
 969         pthread_mutex_unlock(&hdl->libzfs_mnttab_cache_lock);
 970 }
 971
 972 void
 973 libzfs_mnttab_remove(libzfs_handle_t *hdl, const char *fsname)
 974 {
 975         mnttab_node_t find;
 976         mnttab_node_t *ret;
 977
 978         pthread_mutex_lock(&hdl->libzfs_mnttab_cache_lock);
 979         find.mtn_mt.mnt_special = (char *)fsname;
 980         if ((ret = avl_find(&hdl->libzfs_mnttab_cache, (void *)&find, NULL))
 981             != NULL) {
 982                 avl_remove(&hdl->libzfs_mnttab_cache, ret);
 983                 free(ret->mtn_mt.mnt_special);
 984                 free(ret->mtn_mt.mnt_mountp);
 985                 free(ret->mtn_mt.mnt_fstype);
 986                 free(ret->mtn_mt.mnt_mntopts);
 987                 free(ret);
 988         }
 989         pthread_mutex_unlock(&hdl->libzfs_mnttab_cache_lock);
 990 }
 991
 992 int
 993 zfs_spa_version(zfs_handle_t *zhp, int *spa_version)
 994 {
 995         zpool_handle_t *zpool_handle = zhp->zpool_hdl;
 996
 997         if (zpool_handle == NULL)
 998                 return (-1);
 999
1000         *spa_version = zpool_get_prop_int(zpool_handle,
1001             ZPOOL_PROP_VERSION, NULL);
1002         return (0);
1003 }
1004
1005 /*
1006  * The choice of reservation property depends on the SPA version.
1007  */
1008 static int
1009 zfs_which_resv_prop(zfs_handle_t *zhp, zfs_prop_t *resv_prop)
1010 {
1011         int spa_version;
1012
1013         if (zfs_spa_version(zhp, &spa_version) < 0)
1014                 return (-1);
1015
1016         if (spa_version >= SPA_VERSION_REFRESERVATION)
1017                 *resv_prop = ZFS_PROP_REFRESERVATION;
1018         else
1019                 *resv_prop = ZFS_PROP_RESERVATION;
1020
1021         return (0);
1022 }
1023
1024 /*
1025  * Given an nvlist of properties to set, validates that they are correct, and
1026  * parses any numeric properties (index, boolean, etc) if they are specified as
1027  * strings.
1028  */
1029 nvlist_t *
1030 zfs_valid_proplist(libzfs_handle_t *hdl, zfs_type_t type, nvlist_t *nvl,
1031     uint64_t zoned, zfs_handle_t *zhp, zpool_handle_t *zpool_hdl,
1032     boolean_t key_params_ok, const char *errbuf)
1033 {
1034         nvpair_t *elem;
1035         uint64_t intval;
1036         const char *strval;
1037         zfs_prop_t prop;
1038         nvlist_t *ret;
1039         int chosen_normal = -1;
1040         int chosen_utf = -1;
1041         int set_maxbs = 0;
1042
1043         if (nvlist_alloc(&ret, NV_UNIQUE_NAME, 0) != 0) {
1044                 (void) no_memory(hdl);
1045                 return (NULL);
1046         }
1047
1048         /*
1049          * Make sure this property is valid and applies to this type.
1050          */
1051
1052         elem = NULL;
1053         while ((elem = nvlist_next_nvpair(nvl, elem)) != NULL) {
1054                 const char *propname = nvpair_name(elem);
1055
1056                 prop = zfs_name_to_prop(propname);
1057                 if (prop == ZPROP_USERPROP && zfs_prop_user(propname)) {
1058                         /*
1059                          * This is a user property: make sure it's a
1060                          * string, and that it's less than ZAP_MAXNAMELEN.
1061                          */
1062                         if (nvpair_type(elem) != DATA_TYPE_STRING) {
1063                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1064                                     "'%s' must be a string"), propname);
1065                                 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1066                                 goto error;
1067                         }
1068
1069                         if (strlen(nvpair_name(elem)) >= ZAP_MAXNAMELEN) {
1070                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1071                                     "property name '%s' is too long"),
1072                                     propname);
1073                                 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1074                                 goto error;
1075                         }
1076
1077                         (void) nvpair_value_string(elem, &strval);
1078                         if (nvlist_add_string(ret, propname, strval) != 0) {
1079                                 (void) no_memory(hdl);
1080                                 goto error;
1081                         }
1082                         continue;
1083                 }
1084
1085                 /*
1086                  * Currently, only user properties can be modified on
1087                  * snapshots.
1088                  */
1089                 if (type == ZFS_TYPE_SNAPSHOT) {
1090                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1091                             "this property can not be modified for snapshots"));
1092                         (void) zfs_error(hdl, EZFS_PROPTYPE, errbuf);
1093                         goto error;
1094                 }
1095
1096                 if (prop == ZPROP_USERPROP && zfs_prop_userquota(propname)) {
1097                         zfs_userquota_prop_t uqtype;
1098                         char *newpropname = NULL;
1099                         char domain[128];
1100                         uint64_t rid;
1101                         uint64_t valary[3];
1102                         int rc;
1103
1104                         if (userquota_propname_decode(propname, zoned,
1105                             &uqtype, domain, sizeof (domain), &rid) != 0) {
1106                                 zfs_error_aux(hdl,
1107                                     dgettext(TEXT_DOMAIN,
1108                                     "'%s' has an invalid user/group name"),
1109                                     propname);
1110                                 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1111                                 goto error;
1112                         }
1113
1114                         if (uqtype != ZFS_PROP_USERQUOTA &&
1115                             uqtype != ZFS_PROP_GROUPQUOTA &&
1116                             uqtype != ZFS_PROP_USEROBJQUOTA &&
1117                             uqtype != ZFS_PROP_GROUPOBJQUOTA &&
1118                             uqtype != ZFS_PROP_PROJECTQUOTA &&
1119                             uqtype != ZFS_PROP_PROJECTOBJQUOTA) {
1120                                 zfs_error_aux(hdl,
1121                                     dgettext(TEXT_DOMAIN, "'%s' is readonly"),
1122                                     propname);
1123                                 (void) zfs_error(hdl, EZFS_PROPREADONLY,
1124                                     errbuf);
1125                                 goto error;
1126                         }
1127
1128                         if (nvpair_type(elem) == DATA_TYPE_STRING) {
1129                                 (void) nvpair_value_string(elem, &strval);
1130                                 if (strcmp(strval, "none") == 0) {
1131                                         intval = 0;
1132                                 } else if (zfs_nicestrtonum(hdl,
1133                                     strval, &intval) != 0) {
1134                                         (void) zfs_error(hdl,
1135                                             EZFS_BADPROP, errbuf);
1136                                         goto error;
1137                                 }
1138                         } else if (nvpair_type(elem) ==
1139                             DATA_TYPE_UINT64) {
1140                                 (void) nvpair_value_uint64(elem, &intval);
1141                                 if (intval == 0) {
1142                                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1143                                             "use 'none' to disable "
1144                                             "{user|group|project}quota"));
1145                                         goto error;
1146                                 }
1147                         } else {
1148                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1149                                     "'%s' must be a number"), propname);
1150                                 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1151                                 goto error;
1152                         }
1153
1154                         /*
1155                          * Encode the prop name as
1156                          * userquota@<hex-rid>-domain, to make it easy
1157                          * for the kernel to decode.
1158                          */
1159                         rc = asprintf(&newpropname, "%s%llx-%s",
1160                             zfs_userquota_prop_prefixes[uqtype],
1161                             (longlong_t)rid, domain);
1162                         if (rc == -1 || newpropname == NULL) {
1163                                 (void) no_memory(hdl);
1164                                 goto error;
1165                         }
1166
1167                         valary[0] = uqtype;
1168                         valary[1] = rid;
1169                         valary[2] = intval;
1170                         if (nvlist_add_uint64_array(ret, newpropname,
1171                             valary, 3) != 0) {
1172                                 free(newpropname);
1173                                 (void) no_memory(hdl);
1174                                 goto error;
1175                         }
1176                         free(newpropname);
1177                         continue;
1178                 } else if (prop == ZPROP_USERPROP &&
1179                     zfs_prop_written(propname)) {
1180                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1181                             "'%s' is readonly"),
1182                             propname);
1183                         (void) zfs_error(hdl, EZFS_PROPREADONLY, errbuf);
1184                         goto error;
1185                 }
1186
1187                 if (prop == ZPROP_INVAL) {
1188                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1189                             "invalid property '%s'"), propname);
1190                         (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1191                         goto error;
1192                 }
1193
1194                 if (!zfs_prop_valid_for_type(prop, type, B_FALSE)) {
1195                         zfs_error_aux(hdl,
1196                             dgettext(TEXT_DOMAIN, "'%s' does not "
1197                             "apply to datasets of this type"), propname);
1198                         (void) zfs_error(hdl, EZFS_PROPTYPE, errbuf);
1199                         goto error;
1200                 }
1201
1202                 if (zfs_prop_readonly(prop) &&
1203                     !(zfs_prop_setonce(prop) && zhp == NULL) &&
1204                     !(zfs_prop_encryption_key_param(prop) && key_params_ok)) {
1205                         zfs_error_aux(hdl,
1206                             dgettext(TEXT_DOMAIN, "'%s' is readonly"),
1207                             propname);
1208                         (void) zfs_error(hdl, EZFS_PROPREADONLY, errbuf);
1209                         goto error;
1210                 }
1211
1212                 if (zprop_parse_value(hdl, elem, prop, type, ret,
1213                     &strval, &intval, errbuf) != 0)
1214                         goto error;
1215
1216                 /*
1217                  * Perform some additional checks for specific properties.
1218                  */
1219                 switch (prop) {
1220                 case ZFS_PROP_VERSION:
1221                 {
1222                         int version;
1223
1224                         if (zhp == NULL)
1225                                 break;
1226                         version = zfs_prop_get_int(zhp, ZFS_PROP_VERSION);
1227                         if (intval < version) {
1228                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1229                                     "Can not downgrade; already at version %u"),
1230                                     version);
1231                                 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1232                                 goto error;
1233                         }
1234                         break;
1235                 }
1236
1237                 case ZFS_PROP_VOLBLOCKSIZE:
1238                 case ZFS_PROP_RECORDSIZE:
1239                 {
1240                         int maxbs = SPA_MAXBLOCKSIZE;
1241                         char buf[64];
1242
1243                         if (zpool_hdl != NULL) {
1244                                 maxbs = zpool_get_prop_int(zpool_hdl,
1245                                     ZPOOL_PROP_MAXBLOCKSIZE, NULL);
1246                         }
1247                         /*
1248                          * The value must be a power of two between
1249                          * SPA_MINBLOCKSIZE and maxbs.
1250                          */
1251                         if (intval < SPA_MINBLOCKSIZE ||
1252                             intval > maxbs || !ISP2(intval)) {
1253                                 zfs_nicebytes(maxbs, buf, sizeof (buf));
1254                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1255                                     "'%s' must be power of 2 from 512B "
1256                                     "to %s"), propname, buf);
1257                                 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1258                                 goto error;
1259                         }
1260                         /* save the ZFS_PROP_RECORDSIZE during create op */
1261                         if (zpool_hdl == NULL && prop == ZFS_PROP_RECORDSIZE) {
1262                                 set_maxbs = intval;
1263                         }
1264                         break;
1265                 }
1266
1267                 case ZFS_PROP_SPECIAL_SMALL_BLOCKS:
1268                 {
1269                         int maxbs =
1270                             set_maxbs == 0 ? SPA_OLD_MAXBLOCKSIZE : set_maxbs;
1271                         char buf[64];
1272
1273                         if (zpool_hdl != NULL) {
1274                                 char state[64] = "";
1275
1276                                 maxbs = zpool_get_prop_int(zpool_hdl,
1277                                     ZPOOL_PROP_MAXBLOCKSIZE, NULL);
1278
1279                                 /*
1280                                  * Issue a warning but do not fail so that
1281                                  * tests for settable properties succeed.
1282                                  */
1283                                 if (zpool_prop_get_feature(zpool_hdl,
1284                                     "feature@allocation_classes", state,
1285                                     sizeof (state)) != 0 ||
1286                                     strcmp(state, ZFS_FEATURE_ACTIVE) != 0) {
1287                                         (void) fprintf(stderr, gettext(
1288                                             "%s: property requires a special "
1289                                             "device in the pool\n"), propname);
1290                                 }
1291                         }
1292                         if (intval != 0 &&
1293                             (intval < SPA_MINBLOCKSIZE ||
1294                             intval > maxbs || !ISP2(intval))) {
1295                                 zfs_nicebytes(maxbs, buf, sizeof (buf));
1296                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1297                                     "invalid '%s=%llu' property: must be zero "
1298                                     "or a power of 2 from 512B to %s"),
1299                                     propname, (unsigned long long)intval, buf);
1300                                 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1301                                 goto error;
1302                         }
1303                         break;
1304                 }
1305
1306                 case ZFS_PROP_MLSLABEL:
1307                 {
1308 #ifdef HAVE_MLSLABEL
1309                         /*
1310                          * Verify the mlslabel string and convert to
1311                          * internal hex label string.
1312                          */
1313
1314                         m_label_t *new_sl;
1315                         char *hex = NULL;       /* internal label string */
1316
1317                         /* Default value is already OK. */
1318                         if (strcasecmp(strval, ZFS_MLSLABEL_DEFAULT) == 0)
1319                                 break;
1320
1321                         /* Verify the label can be converted to binary form */
1322                         if (((new_sl = m_label_alloc(MAC_LABEL)) == NULL) ||
1323                             (str_to_label(strval, &new_sl, MAC_LABEL,
1324                             L_NO_CORRECTION, NULL) == -1)) {
1325                                 goto badlabel;
1326                         }
1327
1328                         /* Now translate to hex internal label string */
1329                         if (label_to_str(new_sl, &hex, M_INTERNAL,
1330                             DEF_NAMES) != 0) {
1331                                 if (hex)
1332                                         free(hex);
1333                                 goto badlabel;
1334                         }
1335                         m_label_free(new_sl);
1336
1337                         /* If string is already in internal form, we're done. */
1338                         if (strcmp(strval, hex) == 0) {
1339                                 free(hex);
1340                                 break;
1341                         }
1342
1343                         /* Replace the label string with the internal form. */
1344                         (void) nvlist_remove(ret, zfs_prop_to_name(prop),
1345                             DATA_TYPE_STRING);
1346                         fnvlist_add_string(ret, zfs_prop_to_name(prop), hex);
1347                         free(hex);
1348
1349                         break;
1350
1351 badlabel:
1352                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1353                             "invalid mlslabel '%s'"), strval);
1354                         (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1355                         m_label_free(new_sl);   /* OK if null */
1356                         goto error;
1357 #else
1358                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1359                             "mlslabels are unsupported"));
1360                         (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1361                         goto error;
1362 #endif /* HAVE_MLSLABEL */
1363                 }
1364
1365                 case ZFS_PROP_MOUNTPOINT:
1366                 {
1367                         namecheck_err_t why;
1368
1369                         if (strcmp(strval, ZFS_MOUNTPOINT_NONE) == 0 ||
1370                             strcmp(strval, ZFS_MOUNTPOINT_LEGACY) == 0)
1371                                 break;
1372
1373                         if (mountpoint_namecheck(strval, &why)) {
1374                                 switch (why) {
1375                                 case NAME_ERR_LEADING_SLASH:
1376                                         zfs_error_aux(hdl,
1377                                             dgettext(TEXT_DOMAIN,
1378                                             "'%s' must be an absolute path, "
1379                                             "'none', or 'legacy'"), propname);
1380                                         break;
1381                                 case NAME_ERR_TOOLONG:
1382                                         zfs_error_aux(hdl,
1383                                             dgettext(TEXT_DOMAIN,
1384                                             "component of '%s' is too long"),
1385                                             propname);
1386                                         break;
1387
1388                                 default:
1389                                         zfs_error_aux(hdl,
1390                                             dgettext(TEXT_DOMAIN,
1391                                             "(%d) not defined"),
1392                                             why);
1393                                         break;
1394                                 }
1395                                 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1396                                 goto error;
1397                         }
1398                         zfs_fallthrough;
1399                 }
1400
1401                 case ZFS_PROP_SHARESMB:
1402                 case ZFS_PROP_SHARENFS:
1403                         /*
1404                          * For the mountpoint and sharenfs or sharesmb
1405                          * properties, check if it can be set in a
1406                          * global/non-global zone based on
1407                          * the zoned property value:
1408                          *
1409                          *              global zone         non-global zone
1410                          * --------------------------------------------------
1411                          * zoned=on     mountpoint (no)     mountpoint (yes)
1412                          *              sharenfs (no)       sharenfs (no)
1413                          *              sharesmb (no)       sharesmb (no)
1414                          *
1415                          * zoned=off    mountpoint (yes)        N/A
1416                          *              sharenfs (yes)
1417                          *              sharesmb (yes)
1418                          */
1419                         if (zoned) {
1420                                 if (getzoneid() == GLOBAL_ZONEID) {
1421                                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1422                                             "'%s' cannot be set on "
1423                                             "dataset in a non-global zone"),
1424                                             propname);
1425                                         (void) zfs_error(hdl, EZFS_ZONED,
1426                                             errbuf);
1427                                         goto error;
1428                                 } else if (prop == ZFS_PROP_SHARENFS ||
1429                                     prop == ZFS_PROP_SHARESMB) {
1430                                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1431                                             "'%s' cannot be set in "
1432                                             "a non-global zone"), propname);
1433                                         (void) zfs_error(hdl, EZFS_ZONED,
1434                                             errbuf);
1435                                         goto error;
1436                                 }
1437                         } else if (getzoneid() != GLOBAL_ZONEID) {
1438                                 /*
1439                                  * If zoned property is 'off', this must be in
1440                                  * a global zone. If not, something is wrong.
1441                                  */
1442                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1443                                     "'%s' cannot be set while dataset "
1444                                     "'zoned' property is set"), propname);
1445                                 (void) zfs_error(hdl, EZFS_ZONED, errbuf);
1446                                 goto error;
1447                         }
1448
1449                         /*
1450                          * At this point, it is legitimate to set the
1451                          * property. Now we want to make sure that the
1452                          * property value is valid if it is sharenfs.
1453                          */
1454                         if ((prop == ZFS_PROP_SHARENFS ||
1455                             prop == ZFS_PROP_SHARESMB) &&
1456                             strcmp(strval, "on") != 0 &&
1457                             strcmp(strval, "off") != 0) {
1458                                 enum sa_protocol proto;
1459
1460                                 if (prop == ZFS_PROP_SHARESMB)
1461                                         proto = SA_PROTOCOL_SMB;
1462                                 else
1463                                         proto = SA_PROTOCOL_NFS;
1464
1465                                 if (sa_validate_shareopts(strval, proto) !=
1466                                     SA_OK) {
1467                                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1468                                             "'%s' cannot be set to invalid "
1469                                             "options"), propname);
1470                                         (void) zfs_error(hdl, EZFS_BADPROP,
1471                                             errbuf);
1472                                         goto error;
1473                                 }
1474                         }
1475
1476                         break;
1477
1478                 case ZFS_PROP_KEYLOCATION:
1479                         if (!zfs_prop_valid_keylocation(strval, B_FALSE)) {
1480                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1481                                     "invalid keylocation"));
1482                                 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1483                                 goto error;
1484                         }
1485
1486                         if (zhp != NULL) {
1487                                 uint64_t crypt =
1488                                     zfs_prop_get_int(zhp, ZFS_PROP_ENCRYPTION);
1489
1490                                 if (crypt == ZIO_CRYPT_OFF &&
1491                                     strcmp(strval, "none") != 0) {
1492                                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1493                                             "keylocation must be 'none' "
1494                                             "for unencrypted datasets"));
1495                                         (void) zfs_error(hdl, EZFS_BADPROP,
1496                                             errbuf);
1497                                         goto error;
1498                                 } else if (crypt != ZIO_CRYPT_OFF &&
1499                                     strcmp(strval, "none") == 0) {
1500                                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1501                                             "keylocation must not be 'none' "
1502                                             "for encrypted datasets"));
1503                                         (void) zfs_error(hdl, EZFS_BADPROP,
1504                                             errbuf);
1505                                         goto error;
1506                                 }
1507                         }
1508                         break;
1509
1510                 case ZFS_PROP_PBKDF2_ITERS:
1511                         if (intval < MIN_PBKDF2_ITERATIONS) {
1512                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1513                                     "minimum pbkdf2 iterations is %u"),
1514                                     MIN_PBKDF2_ITERATIONS);
1515                                 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1516                                 goto error;
1517                         }
1518                         break;
1519
1520                 case ZFS_PROP_UTF8ONLY:
1521                         chosen_utf = (int)intval;
1522                         break;
1523
1524                 case ZFS_PROP_NORMALIZE:
1525                         chosen_normal = (int)intval;
1526                         break;
1527
1528                 default:
1529                         break;
1530                 }
1531
1532                 /*
1533                  * For changes to existing volumes, we have some additional
1534                  * checks to enforce.
1535                  */
1536                 if (type == ZFS_TYPE_VOLUME && zhp != NULL) {
1537                         uint64_t blocksize = zfs_prop_get_int(zhp,
1538                             ZFS_PROP_VOLBLOCKSIZE);
1539                         char buf[64];
1540
1541                         switch (prop) {
1542                         case ZFS_PROP_VOLSIZE:
1543                                 if (intval % blocksize != 0) {
1544                                         zfs_nicebytes(blocksize, buf,
1545                                             sizeof (buf));
1546                                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1547                                             "'%s' must be a multiple of "
1548                                             "volume block size (%s)"),
1549                                             propname, buf);
1550                                         (void) zfs_error(hdl, EZFS_BADPROP,
1551                                             errbuf);
1552                                         goto error;
1553                                 }
1554
1555                                 if (intval == 0) {
1556                                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1557                                             "'%s' cannot be zero"),
1558                                             propname);
1559                                         (void) zfs_error(hdl, EZFS_BADPROP,
1560                                             errbuf);
1561                                         goto error;
1562                                 }
1563                                 break;
1564
1565                         default:
1566                                 break;
1567                         }
1568                 }
1569
1570                 /* check encryption properties */
1571                 if (zhp != NULL) {
1572                         int64_t crypt = zfs_prop_get_int(zhp,
1573                             ZFS_PROP_ENCRYPTION);
1574
1575                         switch (prop) {
1576                         case ZFS_PROP_COPIES:
1577                                 if (crypt != ZIO_CRYPT_OFF && intval > 2) {
1578                                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1579                                             "encrypted datasets cannot have "
1580                                             "3 copies"));
1581                                         (void) zfs_error(hdl, EZFS_BADPROP,
1582                                             errbuf);
1583                                         goto error;
1584                                 }
1585                                 break;
1586                         default:
1587                                 break;
1588                         }
1589                 }
1590         }
1591
1592         /*
1593          * If normalization was chosen, but no UTF8 choice was made,
1594          * enforce rejection of non-UTF8 names.
1595          *
1596          * If normalization was chosen, but rejecting non-UTF8 names
1597          * was explicitly not chosen, it is an error.
1598          *
1599          * If utf8only was turned off, but the parent has normalization,
1600          * turn off normalization.
1601          */
1602         if (chosen_normal > 0 && chosen_utf < 0) {
1603                 if (nvlist_add_uint64(ret,
1604                     zfs_prop_to_name(ZFS_PROP_UTF8ONLY), 1) != 0) {
1605                         (void) no_memory(hdl);
1606                         goto error;
1607                 }
1608         } else if (chosen_normal > 0 && chosen_utf == 0) {
1609                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1610                     "'%s' must be set 'on' if normalization chosen"),
1611                     zfs_prop_to_name(ZFS_PROP_UTF8ONLY));
1612                 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1613                 goto error;
1614         } else if (chosen_normal < 0 && chosen_utf == 0) {
1615                 if (nvlist_add_uint64(ret,
1616                     zfs_prop_to_name(ZFS_PROP_NORMALIZE), 0) != 0) {
1617                         (void) no_memory(hdl);
1618                         goto error;
1619                 }
1620         }
1621         return (ret);
1622
1623 error:
1624         nvlist_free(ret);
1625         return (NULL);
1626 }
1627
1628 static int
1629 zfs_add_synthetic_resv(zfs_handle_t *zhp, nvlist_t *nvl)
1630 {
1631         uint64_t old_volsize;
1632         uint64_t new_volsize;
1633         uint64_t old_reservation;
1634         uint64_t new_reservation;
1635         zfs_prop_t resv_prop;
1636         nvlist_t *props;
1637         zpool_handle_t *zph = zpool_handle(zhp);
1638
1639         /*
1640          * If this is an existing volume, and someone is setting the volsize,
1641          * make sure that it matches the reservation, or add it if necessary.
1642          */
1643         old_volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE);
1644         if (zfs_which_resv_prop(zhp, &resv_prop) < 0)
1645                 return (-1);
1646         old_reservation = zfs_prop_get_int(zhp, resv_prop);
1647
1648         props = fnvlist_alloc();
1649         fnvlist_add_uint64(props, zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE),
1650             zfs_prop_get_int(zhp, ZFS_PROP_VOLBLOCKSIZE));
1651
1652         if ((zvol_volsize_to_reservation(zph, old_volsize, props) !=
1653             old_reservation) || nvlist_exists(nvl,
1654             zfs_prop_to_name(resv_prop))) {
1655                 fnvlist_free(props);
1656                 return (0);
1657         }
1658         if (nvlist_lookup_uint64(nvl, zfs_prop_to_name(ZFS_PROP_VOLSIZE),
1659             &new_volsize) != 0) {
1660                 fnvlist_free(props);
1661                 return (-1);
1662         }
1663         new_reservation = zvol_volsize_to_reservation(zph, new_volsize, props);
1664         fnvlist_free(props);
1665
1666         if (nvlist_add_uint64(nvl, zfs_prop_to_name(resv_prop),
1667             new_reservation) != 0) {
1668                 (void) no_memory(zhp->zfs_hdl);
1669                 return (-1);
1670         }
1671         return (1);
1672 }
1673
1674 /*
1675  * Helper for 'zfs {set|clone} refreservation=auto'.  Must be called after
1676  * zfs_valid_proplist(), as it is what sets the UINT64_MAX sentinel value.
1677  * Return codes must match zfs_add_synthetic_resv().
1678  */
1679 static int
1680 zfs_fix_auto_resv(zfs_handle_t *zhp, nvlist_t *nvl)
1681 {
1682         uint64_t volsize;
1683         uint64_t resvsize;
1684         zfs_prop_t prop;
1685         nvlist_t *props;
1686
1687         if (!ZFS_IS_VOLUME(zhp)) {
1688                 return (0);
1689         }
1690
1691         if (zfs_which_resv_prop(zhp, &prop) != 0) {
1692                 return (-1);
1693         }
1694
1695         if (prop != ZFS_PROP_REFRESERVATION) {
1696                 return (0);
1697         }
1698
1699         if (nvlist_lookup_uint64(nvl, zfs_prop_to_name(prop), &resvsize) != 0) {
1700                 /* No value being set, so it can't be "auto" */
1701                 return (0);
1702         }
1703         if (resvsize != UINT64_MAX) {
1704                 /* Being set to a value other than "auto" */
1705                 return (0);
1706         }
1707
1708         props = fnvlist_alloc();
1709
1710         fnvlist_add_uint64(props, zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE),
1711             zfs_prop_get_int(zhp, ZFS_PROP_VOLBLOCKSIZE));
1712
1713         if (nvlist_lookup_uint64(nvl, zfs_prop_to_name(ZFS_PROP_VOLSIZE),
1714             &volsize) != 0) {
1715                 volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE);
1716         }
1717
1718         resvsize = zvol_volsize_to_reservation(zpool_handle(zhp), volsize,
1719             props);
1720         fnvlist_free(props);
1721
1722         (void) nvlist_remove_all(nvl, zfs_prop_to_name(prop));
1723         if (nvlist_add_uint64(nvl, zfs_prop_to_name(prop), resvsize) != 0) {
1724                 (void) no_memory(zhp->zfs_hdl);
1725                 return (-1);
1726         }
1727         return (1);
1728 }
1729
1730 static boolean_t
1731 zfs_is_namespace_prop(zfs_prop_t prop)
1732 {
1733         switch (prop) {
1734
1735         case ZFS_PROP_ATIME:
1736         case ZFS_PROP_RELATIME:
1737         case ZFS_PROP_DEVICES:
1738         case ZFS_PROP_EXEC:
1739         case ZFS_PROP_SETUID:
1740         case ZFS_PROP_READONLY:
1741         case ZFS_PROP_XATTR:
1742         case ZFS_PROP_NBMAND:
1743                 return (B_TRUE);
1744
1745         default:
1746                 return (B_FALSE);
1747         }
1748 }
1749
1750 /*
1751  * Given a property name and value, set the property for the given dataset.
1752  */
1753 int
1754 zfs_prop_set(zfs_handle_t *zhp, const char *propname, const char *propval)
1755 {
1756         int ret = -1;
1757         char errbuf[ERRBUFLEN];
1758         libzfs_handle_t *hdl = zhp->zfs_hdl;
1759         nvlist_t *nvl = NULL;
1760
1761         (void) snprintf(errbuf, sizeof (errbuf),
1762             dgettext(TEXT_DOMAIN, "cannot set property for '%s'"),
1763             zhp->zfs_name);
1764
1765         if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0) != 0 ||
1766             nvlist_add_string(nvl, propname, propval) != 0) {
1767                 (void) no_memory(hdl);
1768                 goto error;
1769         }
1770
1771         ret = zfs_prop_set_list(zhp, nvl);
1772
1773 error:
1774         nvlist_free(nvl);
1775         return (ret);
1776 }
1777
1778 /*
1779  * Given an nvlist of property names and values, set the properties for the
1780  * given dataset.
1781  */
1782 int
1783 zfs_prop_set_list(zfs_handle_t *zhp, nvlist_t *props)
1784 {
1785         return (zfs_prop_set_list_flags(zhp, props, 0));
1786 }
1787
1788 /*
1789  * Given an nvlist of property names, values and flags, set the properties
1790  * for the given dataset. If ZFS_SET_NOMOUNT is set, it allows to update
1791  * mountpoint, sharenfs and sharesmb properties without (un/re)mounting
1792  * and (un/re)sharing the dataset.
1793  */
1794 int
1795 zfs_prop_set_list_flags(zfs_handle_t *zhp, nvlist_t *props, int flags)
1796 {
1797         zfs_cmd_t zc = {"\0"};
1798         int ret = -1;
1799         prop_changelist_t **cls = NULL;
1800         int cl_idx;
1801         char errbuf[ERRBUFLEN];
1802         libzfs_handle_t *hdl = zhp->zfs_hdl;
1803         nvlist_t *nvl;
1804         int nvl_len = 0;
1805         int added_resv = 0;
1806         zfs_prop_t prop;
1807         boolean_t nsprop = B_FALSE;
1808         nvpair_t *elem;
1809
1810         (void) snprintf(errbuf, sizeof (errbuf),
1811             dgettext(TEXT_DOMAIN, "cannot set property for '%s'"),
1812             zhp->zfs_name);
1813
1814         if ((nvl = zfs_valid_proplist(hdl, zhp->zfs_type, props,
1815             zfs_prop_get_int(zhp, ZFS_PROP_ZONED), zhp, zhp->zpool_hdl,
1816             B_FALSE, errbuf)) == NULL)
1817                 goto error;
1818
1819         /*
1820          * We have to check for any extra properties which need to be added
1821          * before computing the length of the nvlist.
1822          */
1823         for (elem = nvlist_next_nvpair(nvl, NULL);
1824             elem != NULL;
1825             elem = nvlist_next_nvpair(nvl, elem)) {
1826                 if (zfs_name_to_prop(nvpair_name(elem)) == ZFS_PROP_VOLSIZE &&
1827                     (added_resv = zfs_add_synthetic_resv(zhp, nvl)) == -1) {
1828                         goto error;
1829                 }
1830         }
1831
1832         if (added_resv != 1 &&
1833             (added_resv = zfs_fix_auto_resv(zhp, nvl)) == -1) {
1834                 goto error;
1835         }
1836
1837         /*
1838          * Check how many properties we're setting and allocate an array to
1839          * store changelist pointers for postfix().
1840          */
1841         for (elem = nvlist_next_nvpair(nvl, NULL);
1842             elem != NULL;
1843             elem = nvlist_next_nvpair(nvl, elem))
1844                 nvl_len++;
1845         if ((cls = calloc(nvl_len, sizeof (prop_changelist_t *))) == NULL)
1846                 goto error;
1847
1848         cl_idx = 0;
1849         for (elem = nvlist_next_nvpair(nvl, NULL);
1850             elem != NULL;
1851             elem = nvlist_next_nvpair(nvl, elem)) {
1852
1853                 prop = zfs_name_to_prop(nvpair_name(elem));
1854                 nsprop |= zfs_is_namespace_prop(prop);
1855
1856                 assert(cl_idx < nvl_len);
1857                 /*
1858                  * We don't want to unmount & remount the dataset when changing
1859                  * its canmount property to 'on' or 'noauto'.  We only use
1860                  * the changelist logic to unmount when setting canmount=off.
1861                  */
1862                 if (prop != ZFS_PROP_CANMOUNT ||
1863                     (fnvpair_value_uint64(elem) == ZFS_CANMOUNT_OFF &&
1864                     zfs_is_mounted(zhp, NULL))) {
1865                         cls[cl_idx] = changelist_gather(zhp, prop,
1866                             ((flags & ZFS_SET_NOMOUNT) ?
1867                             CL_GATHER_DONT_UNMOUNT : 0), 0);
1868                         if (cls[cl_idx] == NULL)
1869                                 goto error;
1870                 }
1871
1872                 if (prop == ZFS_PROP_MOUNTPOINT &&
1873                     changelist_haszonedchild(cls[cl_idx])) {
1874                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1875                             "child dataset with inherited mountpoint is used "
1876                             "in a non-global zone"));
1877                         ret = zfs_error(hdl, EZFS_ZONED, errbuf);
1878                         goto error;
1879                 }
1880
1881                 if (cls[cl_idx] != NULL &&
1882                     (ret = changelist_prefix(cls[cl_idx])) != 0)
1883                         goto error;
1884
1885                 cl_idx++;
1886         }
1887         assert(cl_idx == nvl_len);
1888
1889         /*
1890          * Execute the corresponding ioctl() to set this list of properties.
1891          */
1892         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
1893
1894         zcmd_write_src_nvlist(hdl, &zc, nvl);
1895         zcmd_alloc_dst_nvlist(hdl, &zc, 0);
1896
1897         ret = zfs_ioctl(hdl, ZFS_IOC_SET_PROP, &zc);
1898
1899         if (ret != 0) {
1900                 if (zc.zc_nvlist_dst_filled == B_FALSE) {
1901                         (void) zfs_standard_error(hdl, errno, errbuf);
1902                         goto error;
1903                 }
1904
1905                 /* Get the list of unset properties back and report them. */
1906                 nvlist_t *errorprops = NULL;
1907                 if (zcmd_read_dst_nvlist(hdl, &zc, &errorprops) != 0)
1908                         goto error;
1909                 for (nvpair_t *elem = nvlist_next_nvpair(errorprops, NULL);
1910                     elem != NULL;
1911                     elem = nvlist_next_nvpair(errorprops, elem)) {
1912                         prop = zfs_name_to_prop(nvpair_name(elem));
1913                         zfs_setprop_error(hdl, prop, errno, errbuf);
1914                 }
1915                 nvlist_free(errorprops);
1916
1917                 if (added_resv && errno == ENOSPC) {
1918                         /* clean up the volsize property we tried to set */
1919                         uint64_t old_volsize = zfs_prop_get_int(zhp,
1920                             ZFS_PROP_VOLSIZE);
1921                         nvlist_free(nvl);
1922                         nvl = NULL;
1923                         zcmd_free_nvlists(&zc);
1924
1925                         if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0) != 0)
1926                                 goto error;
1927                         if (nvlist_add_uint64(nvl,
1928                             zfs_prop_to_name(ZFS_PROP_VOLSIZE),
1929                             old_volsize) != 0)
1930                                 goto error;
1931                         zcmd_write_src_nvlist(hdl, &zc, nvl);
1932                         (void) zfs_ioctl(hdl, ZFS_IOC_SET_PROP, &zc);
1933                 }
1934         } else {
1935                 for (cl_idx = 0; cl_idx < nvl_len; cl_idx++) {
1936                         if (cls[cl_idx] != NULL) {
1937                                 int clp_err = changelist_postfix(cls[cl_idx]);
1938                                 if (clp_err != 0)
1939                                         ret = clp_err;
1940                         }
1941                 }
1942
1943                 if (ret == 0) {
1944                         /*
1945                          * Refresh the statistics so the new property
1946                          * value is reflected.
1947                          */
1948                         (void) get_stats(zhp);
1949
1950                         /*
1951                          * Remount the filesystem to propagate the change
1952                          * if one of the options handled by the generic
1953                          * Linux namespace layer has been modified.
1954                          */
1955                         if (nsprop && zfs_is_mounted(zhp, NULL))
1956                                 ret = zfs_mount(zhp, MNTOPT_REMOUNT, 0);
1957                 }
1958         }
1959
1960 error:
1961         nvlist_free(nvl);
1962         zcmd_free_nvlists(&zc);
1963         if (cls != NULL) {
1964                 for (cl_idx = 0; cl_idx < nvl_len; cl_idx++) {
1965                         if (cls[cl_idx] != NULL)
1966                                 changelist_free(cls[cl_idx]);
1967                 }
1968                 free(cls);
1969         }
1970         return (ret);
1971 }
1972
1973 /*
1974  * Given a property, inherit the value from the parent dataset, or if received
1975  * is TRUE, revert to the received value, if any.
1976  */
1977 int
1978 zfs_prop_inherit(zfs_handle_t *zhp, const char *propname, boolean_t received)
1979 {
1980         zfs_cmd_t zc = {"\0"};
1981         int ret;
1982         prop_changelist_t *cl;
1983         libzfs_handle_t *hdl = zhp->zfs_hdl;
1984         char errbuf[ERRBUFLEN];
1985         zfs_prop_t prop;
1986
1987         (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
1988             "cannot inherit %s for '%s'"), propname, zhp->zfs_name);
1989
1990         zc.zc_cookie = received;
1991         if ((prop = zfs_name_to_prop(propname)) == ZPROP_USERPROP) {
1992                 /*
1993                  * For user properties, the amount of work we have to do is very
1994                  * small, so just do it here.
1995                  */
1996                 if (!zfs_prop_user(propname)) {
1997                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1998                             "invalid property"));
1999                         return (zfs_error(hdl, EZFS_BADPROP, errbuf));
2000                 }
2001
2002                 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
2003                 (void) strlcpy(zc.zc_value, propname, sizeof (zc.zc_value));
2004
2005                 if (zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_INHERIT_PROP, &zc) != 0)
2006                         return (zfs_standard_error(hdl, errno, errbuf));
2007
2008                 (void) get_stats(zhp);
2009                 return (0);
2010         }
2011
2012         /*
2013          * Verify that this property is inheritable.
2014          */
2015         if (zfs_prop_readonly(prop))
2016                 return (zfs_error(hdl, EZFS_PROPREADONLY, errbuf));
2017
2018         if (!zfs_prop_inheritable(prop) && !received)
2019                 return (zfs_error(hdl, EZFS_PROPNONINHERIT, errbuf));
2020
2021         /*
2022          * Check to see if the value applies to this type
2023          */
2024         if (!zfs_prop_valid_for_type(prop, zhp->zfs_type, B_FALSE))
2025                 return (zfs_error(hdl, EZFS_PROPTYPE, errbuf));
2026
2027         /*
2028          * Normalize the name, to get rid of shorthand abbreviations.
2029          */
2030         propname = zfs_prop_to_name(prop);
2031         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
2032         (void) strlcpy(zc.zc_value, propname, sizeof (zc.zc_value));
2033
2034         if (prop == ZFS_PROP_MOUNTPOINT && getzoneid() == GLOBAL_ZONEID &&
2035             zfs_prop_get_int(zhp, ZFS_PROP_ZONED)) {
2036                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
2037                     "dataset is used in a non-global zone"));
2038                 return (zfs_error(hdl, EZFS_ZONED, errbuf));
2039         }
2040
2041         /*
2042          * Determine datasets which will be affected by this change, if any.
2043          */
2044         if ((cl = changelist_gather(zhp, prop, 0, 0)) == NULL)
2045                 return (-1);
2046
2047         if (prop == ZFS_PROP_MOUNTPOINT && changelist_haszonedchild(cl)) {
2048                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
2049                     "child dataset with inherited mountpoint is used "
2050                     "in a non-global zone"));
2051                 ret = zfs_error(hdl, EZFS_ZONED, errbuf);
2052                 goto error;
2053         }
2054
2055         if ((ret = changelist_prefix(cl)) != 0)
2056                 goto error;
2057
2058         if (zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_INHERIT_PROP, &zc) != 0) {
2059                 changelist_free(cl);
2060                 return (zfs_standard_error(hdl, errno, errbuf));
2061         } else {
2062
2063                 if ((ret = changelist_postfix(cl)) != 0)
2064                         goto error;
2065
2066                 /*
2067                  * Refresh the statistics so the new property is reflected.
2068                  */
2069                 (void) get_stats(zhp);
2070
2071                 /*
2072                  * Remount the filesystem to propagate the change
2073                  * if one of the options handled by the generic
2074                  * Linux namespace layer has been modified.
2075                  */
2076                 if (zfs_is_namespace_prop(prop) &&
2077                     zfs_is_mounted(zhp, NULL))
2078                         ret = zfs_mount(zhp, MNTOPT_REMOUNT, 0);
2079         }
2080
2081 error:
2082         changelist_free(cl);
2083         return (ret);
2084 }
2085
2086 /*
2087  * True DSL properties are stored in an nvlist.  The following two functions
2088  * extract them appropriately.
2089  */
2090 uint64_t
2091 getprop_uint64(zfs_handle_t *zhp, zfs_prop_t prop, const char **source)
2092 {
2093         nvlist_t *nv;
2094         uint64_t value;
2095
2096         *source = NULL;
2097         if (nvlist_lookup_nvlist(zhp->zfs_props,
2098             zfs_prop_to_name(prop), &nv) == 0) {
2099                 value = fnvlist_lookup_uint64(nv, ZPROP_VALUE);
2100                 (void) nvlist_lookup_string(nv, ZPROP_SOURCE, source);
2101         } else {
2102                 verify(!zhp->zfs_props_table ||
2103                     zhp->zfs_props_table[prop] == B_TRUE);
2104                 value = zfs_prop_default_numeric(prop);
2105                 *source = "";
2106         }
2107
2108         return (value);
2109 }
2110
2111 static const char *
2112 getprop_string(zfs_handle_t *zhp, zfs_prop_t prop, const char **source)
2113 {
2114         nvlist_t *nv;
2115         const char *value;
2116
2117         *source = NULL;
2118         if (nvlist_lookup_nvlist(zhp->zfs_props,
2119             zfs_prop_to_name(prop), &nv) == 0) {
2120                 value = fnvlist_lookup_string(nv, ZPROP_VALUE);
2121                 (void) nvlist_lookup_string(nv, ZPROP_SOURCE, source);
2122         } else {
2123                 verify(!zhp->zfs_props_table ||
2124                     zhp->zfs_props_table[prop] == B_TRUE);
2125                 value = zfs_prop_default_string(prop);
2126                 *source = "";
2127         }
2128
2129         return (value);
2130 }
2131
2132 static boolean_t
2133 zfs_is_recvd_props_mode(zfs_handle_t *zhp)
2134 {
2135         return (zhp->zfs_props != NULL &&
2136             zhp->zfs_props == zhp->zfs_recvd_props);
2137 }
2138
2139 static void
2140 zfs_set_recvd_props_mode(zfs_handle_t *zhp, uintptr_t *cookie)
2141 {
2142         *cookie = (uintptr_t)zhp->zfs_props;
2143         zhp->zfs_props = zhp->zfs_recvd_props;
2144 }
2145
2146 static void
2147 zfs_unset_recvd_props_mode(zfs_handle_t *zhp, uintptr_t *cookie)
2148 {
2149         zhp->zfs_props = (nvlist_t *)*cookie;
2150         *cookie = 0;
2151 }
2152
2153 /*
2154  * Internal function for getting a numeric property.  Both zfs_prop_get() and
2155  * zfs_prop_get_int() are built using this interface.
2156  *
2157  * Certain properties can be overridden using 'mount -o'.  In this case, scan
2158  * the contents of the /proc/self/mounts entry, searching for the
2159  * appropriate options. If they differ from the on-disk values, report the
2160  * current values and mark the source "temporary".
2161  */
2162 static int
2163 get_numeric_property(zfs_handle_t *zhp, zfs_prop_t prop, zprop_source_t *src,
2164     const char **source, uint64_t *val)
2165 {
2166         zfs_cmd_t zc = {"\0"};
2167         nvlist_t *zplprops = NULL;
2168         struct mnttab mnt;
2169         const char *mntopt_on = NULL;
2170         const char *mntopt_off = NULL;
2171         boolean_t received = zfs_is_recvd_props_mode(zhp);
2172
2173         *source = NULL;
2174
2175         /*
2176          * If the property is being fetched for a snapshot, check whether
2177          * the property is valid for the snapshot's head dataset type.
2178          */
2179         if (zhp->zfs_type == ZFS_TYPE_SNAPSHOT &&
2180             !zfs_prop_valid_for_type(prop, zhp->zfs_head_type, B_TRUE)) {
2181                 *val = zfs_prop_default_numeric(prop);
2182                 return (-1);
2183         }
2184
2185         switch (prop) {
2186         case ZFS_PROP_ATIME:
2187                 mntopt_on = MNTOPT_ATIME;
2188                 mntopt_off = MNTOPT_NOATIME;
2189                 break;
2190
2191         case ZFS_PROP_RELATIME:
2192                 mntopt_on = MNTOPT_RELATIME;
2193                 mntopt_off = MNTOPT_NORELATIME;
2194                 break;
2195
2196         case ZFS_PROP_DEVICES:
2197                 mntopt_on = MNTOPT_DEVICES;
2198                 mntopt_off = MNTOPT_NODEVICES;
2199                 break;
2200
2201         case ZFS_PROP_EXEC:
2202                 mntopt_on = MNTOPT_EXEC;
2203                 mntopt_off = MNTOPT_NOEXEC;
2204                 break;
2205
2206         case ZFS_PROP_READONLY:
2207                 mntopt_on = MNTOPT_RO;
2208                 mntopt_off = MNTOPT_RW;
2209                 break;
2210
2211         case ZFS_PROP_SETUID:
2212                 mntopt_on = MNTOPT_SETUID;
2213                 mntopt_off = MNTOPT_NOSETUID;
2214                 break;
2215
2216         case ZFS_PROP_XATTR:
2217                 mntopt_on = MNTOPT_XATTR;
2218                 mntopt_off = MNTOPT_NOXATTR;
2219                 break;
2220
2221         case ZFS_PROP_NBMAND:
2222                 mntopt_on = MNTOPT_NBMAND;
2223                 mntopt_off = MNTOPT_NONBMAND;
2224                 break;
2225
2226         default:
2227                 break;
2228         }
2229
2230         /*
2231          * Because looking up the mount options is potentially expensive
2232          * (iterating over all of /proc/self/mounts), we defer its
2233          * calculation until we're looking up a property which requires
2234          * its presence.
2235          */
2236         if (!zhp->zfs_mntcheck &&
2237             (mntopt_on != NULL || prop == ZFS_PROP_MOUNTED)) {
2238                 libzfs_handle_t *hdl = zhp->zfs_hdl;
2239                 struct mnttab entry;
2240
2241                 if (libzfs_mnttab_find(hdl, zhp->zfs_name, &entry) == 0)
2242                         zhp->zfs_mntopts = zfs_strdup(hdl,
2243                             entry.mnt_mntopts);
2244
2245                 zhp->zfs_mntcheck = B_TRUE;
2246         }
2247
2248         if (zhp->zfs_mntopts == NULL)
2249                 mnt.mnt_mntopts = (char *)"";
2250         else
2251                 mnt.mnt_mntopts = zhp->zfs_mntopts;
2252
2253         switch (prop) {
2254         case ZFS_PROP_ATIME:
2255         case ZFS_PROP_RELATIME:
2256         case ZFS_PROP_DEVICES:
2257         case ZFS_PROP_EXEC:
2258         case ZFS_PROP_READONLY:
2259         case ZFS_PROP_SETUID:
2260 #ifndef __FreeBSD__
2261         case ZFS_PROP_XATTR:
2262 #endif
2263         case ZFS_PROP_NBMAND:
2264                 *val = getprop_uint64(zhp, prop, source);
2265
2266                 if (received)
2267                         break;
2268
2269                 if (hasmntopt(&mnt, mntopt_on) && !*val) {
2270                         *val = B_TRUE;
2271                         if (src)
2272                                 *src = ZPROP_SRC_TEMPORARY;
2273                 } else if (hasmntopt(&mnt, mntopt_off) && *val) {
2274                         *val = B_FALSE;
2275                         if (src)
2276                                 *src = ZPROP_SRC_TEMPORARY;
2277                 }
2278                 break;
2279
2280         case ZFS_PROP_CANMOUNT:
2281         case ZFS_PROP_VOLSIZE:
2282         case ZFS_PROP_QUOTA:
2283         case ZFS_PROP_REFQUOTA:
2284         case ZFS_PROP_RESERVATION:
2285         case ZFS_PROP_REFRESERVATION:
2286         case ZFS_PROP_FILESYSTEM_LIMIT:
2287         case ZFS_PROP_SNAPSHOT_LIMIT:
2288         case ZFS_PROP_FILESYSTEM_COUNT:
2289         case ZFS_PROP_SNAPSHOT_COUNT:
2290                 *val = getprop_uint64(zhp, prop, source);
2291
2292                 if (*source == NULL) {
2293                         /* not default, must be local */
2294                         *source = zhp->zfs_name;
2295                 }
2296                 break;
2297
2298         case ZFS_PROP_MOUNTED:
2299                 *val = (zhp->zfs_mntopts != NULL);
2300                 break;
2301
2302         case ZFS_PROP_NUMCLONES:
2303                 *val = zhp->zfs_dmustats.dds_num_clones;
2304                 break;
2305
2306         case ZFS_PROP_VERSION:
2307         case ZFS_PROP_NORMALIZE:
2308         case ZFS_PROP_UTF8ONLY:
2309         case ZFS_PROP_CASE:
2310                 zcmd_alloc_dst_nvlist(zhp->zfs_hdl, &zc, 0);
2311
2312                 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
2313                 if (zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_OBJSET_ZPLPROPS, &zc)) {
2314                         zcmd_free_nvlists(&zc);
2315                         if (prop == ZFS_PROP_VERSION &&
2316                             zhp->zfs_type == ZFS_TYPE_VOLUME)
2317                                 *val = zfs_prop_default_numeric(prop);
2318                         return (-1);
2319                 }
2320                 if (zcmd_read_dst_nvlist(zhp->zfs_hdl, &zc, &zplprops) != 0 ||
2321                     nvlist_lookup_uint64(zplprops, zfs_prop_to_name(prop),
2322                     val) != 0) {
2323                         zcmd_free_nvlists(&zc);
2324                         return (-1);
2325                 }
2326                 nvlist_free(zplprops);
2327                 zcmd_free_nvlists(&zc);
2328                 break;
2329
2330         case ZFS_PROP_INCONSISTENT:
2331                 *val = zhp->zfs_dmustats.dds_inconsistent;
2332                 break;
2333
2334         case ZFS_PROP_REDACTED:
2335                 *val = zhp->zfs_dmustats.dds_redacted;
2336                 break;
2337
2338         case ZFS_PROP_GUID:
2339                 if (zhp->zfs_dmustats.dds_guid != 0)
2340                         *val = zhp->zfs_dmustats.dds_guid;
2341                 else
2342                         *val = getprop_uint64(zhp, prop, source);
2343                 break;
2344
2345         case ZFS_PROP_CREATETXG:
2346                 /*
2347                  * We can directly read createtxg property from zfs
2348                  * handle for Filesystem, Snapshot and ZVOL types.
2349                  */
2350                 if (((zhp->zfs_type == ZFS_TYPE_FILESYSTEM) ||
2351                     (zhp->zfs_type == ZFS_TYPE_SNAPSHOT) ||
2352                     (zhp->zfs_type == ZFS_TYPE_VOLUME)) &&
2353                     (zhp->zfs_dmustats.dds_creation_txg != 0)) {
2354                         *val = zhp->zfs_dmustats.dds_creation_txg;
2355                         break;
2356                 } else {
2357                         *val = getprop_uint64(zhp, prop, source);
2358                 }
2359                 zfs_fallthrough;
2360         default:
2361                 switch (zfs_prop_get_type(prop)) {
2362                 case PROP_TYPE_NUMBER:
2363                 case PROP_TYPE_INDEX:
2364                         *val = getprop_uint64(zhp, prop, source);
2365                         /*
2366                          * If we tried to use a default value for a
2367                          * readonly property, it means that it was not
2368                          * present.  Note this only applies to "truly"
2369                          * readonly properties, not set-once properties
2370                          * like volblocksize.
2371                          */
2372                         if (zfs_prop_readonly(prop) &&
2373                             !zfs_prop_setonce(prop) &&
2374                             *source != NULL && (*source)[0] == '\0') {
2375                                 *source = NULL;
2376                                 return (-1);
2377                         }
2378                         break;
2379
2380                 case PROP_TYPE_STRING:
2381                 default:
2382                         zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN,
2383                             "cannot get non-numeric property"));
2384                         return (zfs_error(zhp->zfs_hdl, EZFS_BADPROP,
2385                             dgettext(TEXT_DOMAIN, "internal error")));
2386                 }
2387         }
2388
2389         return (0);
2390 }
2391
2392 /*
2393  * Calculate the source type, given the raw source string.
2394  */
2395 static void
2396 get_source(zfs_handle_t *zhp, zprop_source_t *srctype, const char *source,
2397     char *statbuf, size_t statlen)
2398 {
2399         if (statbuf == NULL ||
2400             srctype == NULL || *srctype == ZPROP_SRC_TEMPORARY) {
2401                 return;
2402         }
2403
2404         if (source == NULL) {
2405                 *srctype = ZPROP_SRC_NONE;
2406         } else if (source[0] == '\0') {
2407                 *srctype = ZPROP_SRC_DEFAULT;
2408         } else if (strstr(source, ZPROP_SOURCE_VAL_RECVD) != NULL) {
2409                 *srctype = ZPROP_SRC_RECEIVED;
2410         } else {
2411                 if (strcmp(source, zhp->zfs_name) == 0) {
2412                         *srctype = ZPROP_SRC_LOCAL;
2413                 } else {
2414                         (void) strlcpy(statbuf, source, statlen);
2415                         *srctype = ZPROP_SRC_INHERITED;
2416                 }
2417         }
2418
2419 }
2420
2421 int
2422 zfs_prop_get_recvd(zfs_handle_t *zhp, const char *propname, char *propbuf,
2423     size_t proplen, boolean_t literal)
2424 {
2425         zfs_prop_t prop;
2426         int err = 0;
2427
2428         if (zhp->zfs_recvd_props == NULL)
2429                 if (get_recvd_props_ioctl(zhp) != 0)
2430                         return (-1);
2431
2432         prop = zfs_name_to_prop(propname);
2433
2434         if (prop != ZPROP_USERPROP) {
2435                 uintptr_t cookie;
2436                 if (!nvlist_exists(zhp->zfs_recvd_props, propname))
2437                         return (-1);
2438                 zfs_set_recvd_props_mode(zhp, &cookie);
2439                 err = zfs_prop_get(zhp, prop, propbuf, proplen,
2440                     NULL, NULL, 0, literal);
2441                 zfs_unset_recvd_props_mode(zhp, &cookie);
2442         } else {
2443                 nvlist_t *propval;
2444                 const char *recvdval;
2445                 if (nvlist_lookup_nvlist(zhp->zfs_recvd_props,
2446                     propname, &propval) != 0)
2447                         return (-1);
2448                 recvdval = fnvlist_lookup_string(propval, ZPROP_VALUE);
2449                 (void) strlcpy(propbuf, recvdval, proplen);
2450         }
2451
2452         return (err == 0 ? 0 : -1);
2453 }
2454
2455 static int
2456 get_clones_string(zfs_handle_t *zhp, char *propbuf, size_t proplen)
2457 {
2458         nvlist_t *value;
2459         nvpair_t *pair;
2460
2461         value = zfs_get_clones_nvl(zhp);
2462         if (value == NULL || nvlist_empty(value))
2463                 return (-1);
2464
2465         propbuf[0] = '\0';
2466         for (pair = nvlist_next_nvpair(value, NULL); pair != NULL;
2467             pair = nvlist_next_nvpair(value, pair)) {
2468                 if (propbuf[0] != '\0')
2469                         (void) strlcat(propbuf, ",", proplen);
2470                 (void) strlcat(propbuf, nvpair_name(pair), proplen);
2471         }
2472
2473         return (0);
2474 }
2475
2476 struct get_clones_arg {
2477         uint64_t numclones;
2478         nvlist_t *value;
2479         const char *origin;
2480         char buf[ZFS_MAX_DATASET_NAME_LEN];
2481 };
2482
2483 static int
2484 get_clones_cb(zfs_handle_t *zhp, void *arg)
2485 {
2486         struct get_clones_arg *gca = arg;
2487
2488         if (gca->numclones == 0) {
2489                 zfs_close(zhp);
2490                 return (0);
2491         }
2492
2493         if (zfs_prop_get(zhp, ZFS_PROP_ORIGIN, gca->buf, sizeof (gca->buf),
2494             NULL, NULL, 0, B_TRUE) != 0)
2495                 goto out;
2496         if (strcmp(gca->buf, gca->origin) == 0) {
2497                 fnvlist_add_boolean(gca->value, zfs_get_name(zhp));
2498                 gca->numclones--;
2499         }
2500
2501 out:
2502         (void) zfs_iter_children_v2(zhp, 0, get_clones_cb, gca);
2503         zfs_close(zhp);
2504         return (0);
2505 }
2506
2507 nvlist_t *
2508 zfs_get_clones_nvl(zfs_handle_t *zhp)
2509 {
2510         nvlist_t *nv, *value;
2511
2512         if (nvlist_lookup_nvlist(zhp->zfs_props,
2513             zfs_prop_to_name(ZFS_PROP_CLONES), &nv) != 0) {
2514                 struct get_clones_arg gca;
2515
2516                 /*
2517                  * if this is a snapshot, then the kernel wasn't able
2518                  * to get the clones.  Do it by slowly iterating.
2519                  */
2520                 if (zhp->zfs_type != ZFS_TYPE_SNAPSHOT)
2521                         return (NULL);
2522                 if (nvlist_alloc(&nv, NV_UNIQUE_NAME, 0) != 0)
2523                         return (NULL);
2524                 if (nvlist_alloc(&value, NV_UNIQUE_NAME, 0) != 0) {
2525                         nvlist_free(nv);
2526                         return (NULL);
2527                 }
2528
2529                 gca.numclones = zfs_prop_get_int(zhp, ZFS_PROP_NUMCLONES);
2530                 gca.value = value;
2531                 gca.origin = zhp->zfs_name;
2532
2533                 if (gca.numclones != 0) {
2534                         zfs_handle_t *root;
2535                         char pool[ZFS_MAX_DATASET_NAME_LEN];
2536                         char *cp = pool;
2537
2538                         /* get the pool name */
2539                         (void) strlcpy(pool, zhp->zfs_name, sizeof (pool));
2540                         (void) strsep(&cp, "/@");
2541                         root = zfs_open(zhp->zfs_hdl, pool,
2542                             ZFS_TYPE_FILESYSTEM);
2543                         if (root == NULL) {
2544                                 nvlist_free(nv);
2545                                 nvlist_free(value);
2546                                 return (NULL);
2547                         }
2548
2549                         (void) get_clones_cb(root, &gca);
2550                 }
2551
2552                 if (gca.numclones != 0 ||
2553                     nvlist_add_nvlist(nv, ZPROP_VALUE, value) != 0 ||
2554                     nvlist_add_nvlist(zhp->zfs_props,
2555                     zfs_prop_to_name(ZFS_PROP_CLONES), nv) != 0) {
2556                         nvlist_free(nv);
2557                         nvlist_free(value);
2558                         return (NULL);
2559                 }
2560                 nvlist_free(nv);
2561                 nvlist_free(value);
2562                 nv = fnvlist_lookup_nvlist(zhp->zfs_props,
2563                     zfs_prop_to_name(ZFS_PROP_CLONES));
2564         }
2565
2566         return (fnvlist_lookup_nvlist(nv, ZPROP_VALUE));
2567 }
2568
2569 static int
2570 get_rsnaps_string(zfs_handle_t *zhp, char *propbuf, size_t proplen)
2571 {
2572         nvlist_t *value;
2573         uint64_t *snaps;
2574         uint_t nsnaps;
2575
2576         if (nvlist_lookup_nvlist(zhp->zfs_props,
2577             zfs_prop_to_name(ZFS_PROP_REDACT_SNAPS), &value) != 0)
2578                 return (-1);
2579         if (nvlist_lookup_uint64_array(value, ZPROP_VALUE, &snaps,
2580             &nsnaps) != 0)
2581                 return (-1);
2582         if (nsnaps == 0) {
2583                 /* There's no redaction snapshots; pass a special value back */
2584                 (void) snprintf(propbuf, proplen, "none");
2585                 return (0);
2586         }
2587         propbuf[0] = '\0';
2588         for (int i = 0; i < nsnaps; i++) {
2589                 char buf[128];
2590                 if (propbuf[0] != '\0')
2591                         (void) strlcat(propbuf, ",", proplen);
2592                 (void) snprintf(buf, sizeof (buf), "%llu",
2593                     (u_longlong_t)snaps[i]);
2594                 (void) strlcat(propbuf, buf, proplen);
2595         }
2596
2597         return (0);
2598 }
2599
2600 /*
2601  * Accepts a property and value and checks that the value
2602  * matches the one found by the channel program. If they are
2603  * not equal, print both of them.
2604  */
2605 static void
2606 zcp_check(zfs_handle_t *zhp, zfs_prop_t prop, uint64_t intval,
2607     const char *strval)
2608 {
2609         if (!zhp->zfs_hdl->libzfs_prop_debug)
2610                 return;
2611         int error;
2612         char *poolname = zhp->zpool_hdl->zpool_name;
2613         const char *prop_name = zfs_prop_to_name(prop);
2614         const char *program =
2615             "args = ...\n"
2616             "ds = args['dataset']\n"
2617             "prop = args['property']\n"
2618             "value, setpoint = zfs.get_prop(ds, prop)\n"
2619             "return {value=value, setpoint=setpoint}\n";
2620         nvlist_t *outnvl;
2621         nvlist_t *retnvl;
2622         nvlist_t *argnvl = fnvlist_alloc();
2623
2624         fnvlist_add_string(argnvl, "dataset", zhp->zfs_name);
2625         fnvlist_add_string(argnvl, "property", zfs_prop_to_name(prop));
2626
2627         error = lzc_channel_program_nosync(poolname, program,
2628             10 * 1000 * 1000, 10 * 1024 * 1024, argnvl, &outnvl);
2629
2630         if (error == 0) {
2631                 retnvl = fnvlist_lookup_nvlist(outnvl, "return");
2632                 if (zfs_prop_get_type(prop) == PROP_TYPE_NUMBER) {
2633                         int64_t ans;
2634                         error = nvlist_lookup_int64(retnvl, "value", &ans);
2635                         if (error != 0) {
2636                                 (void) fprintf(stderr, "%s: zcp check error: "
2637                                     "%u\n", prop_name, error);
2638                                 return;
2639                         }
2640                         if (ans != intval) {
2641                                 (void) fprintf(stderr, "%s: zfs found %llu, "
2642                                     "but zcp found %llu\n", prop_name,
2643                                     (u_longlong_t)intval, (u_longlong_t)ans);
2644                         }
2645                 } else {
2646                         const char *str_ans;
2647                         error = nvlist_lookup_string(retnvl, "value", &str_ans);
2648                         if (error != 0) {
2649                                 (void) fprintf(stderr, "%s: zcp check error: "
2650                                     "%u\n", prop_name, error);
2651                                 return;
2652                         }
2653                         if (strcmp(strval, str_ans) != 0) {
2654                                 (void) fprintf(stderr,
2655                                     "%s: zfs found '%s', but zcp found '%s'\n",
2656                                     prop_name, strval, str_ans);
2657                         }
2658                 }
2659         } else {
2660                 (void) fprintf(stderr, "%s: zcp check failed, channel program "
2661                     "error: %u\n", prop_name, error);
2662         }
2663         nvlist_free(argnvl);
2664         nvlist_free(outnvl);
2665 }
2666
2667 /*
2668  * Retrieve a property from the given object.  If 'literal' is specified, then
2669  * numbers are left as exact values.  Otherwise, numbers are converted to a
2670  * human-readable form.
2671  *
2672  * Returns 0 on success, or -1 on error.
2673  */
2674 int
2675 zfs_prop_get(zfs_handle_t *zhp, zfs_prop_t prop, char *propbuf, size_t proplen,
2676     zprop_source_t *src, char *statbuf, size_t statlen, boolean_t literal)
2677 {
2678         const char *source = NULL;
2679         uint64_t val;
2680         const char *str;
2681         const char *strval;
2682         boolean_t received = zfs_is_recvd_props_mode(zhp);
2683
2684         /*
2685          * Check to see if this property applies to our object
2686          */
2687         if (!zfs_prop_valid_for_type(prop, zhp->zfs_type, B_FALSE))
2688                 return (-1);
2689
2690         if (received && zfs_prop_readonly(prop))
2691                 return (-1);
2692
2693         if (src)
2694                 *src = ZPROP_SRC_NONE;
2695
2696         switch (prop) {
2697         case ZFS_PROP_CREATION:
2698                 /*
2699                  * 'creation' is a time_t stored in the statistics.  We convert
2700                  * this into a string unless 'literal' is specified.
2701                  */
2702                 {
2703                         val = getprop_uint64(zhp, prop, &source);
2704                         time_t time = (time_t)val;
2705                         struct tm t;
2706
2707                         if (literal ||
2708                             localtime_r(&time, &t) == NULL ||
2709                             strftime(propbuf, proplen, "%a %b %e %k:%M %Y",
2710                             &t) == 0)
2711                                 (void) snprintf(propbuf, proplen, "%llu",
2712                                     (u_longlong_t)val);
2713                 }
2714                 zcp_check(zhp, prop, val, NULL);
2715                 break;
2716
2717         case ZFS_PROP_MOUNTPOINT:
2718                 /*
2719                  * Getting the precise mountpoint can be tricky.
2720                  *
2721                  *  - for 'none' or 'legacy', return those values.
2722                  *  - for inherited mountpoints, we want to take everything
2723                  *    after our ancestor and append it to the inherited value.
2724                  *
2725                  * If the pool has an alternate root, we want to prepend that
2726                  * root to any values we return.
2727                  */
2728
2729                 str = getprop_string(zhp, prop, &source);
2730
2731                 if (str[0] == '/') {
2732                         char buf[MAXPATHLEN];
2733                         char *root = buf;
2734                         const char *relpath;
2735
2736                         /*
2737                          * If we inherit the mountpoint, even from a dataset
2738                          * with a received value, the source will be the path of
2739                          * the dataset we inherit from. If source is
2740                          * ZPROP_SOURCE_VAL_RECVD, the received value is not
2741                          * inherited.
2742                          */
2743                         if (strcmp(source, ZPROP_SOURCE_VAL_RECVD) == 0) {
2744                                 relpath = "";
2745                         } else {
2746                                 relpath = zhp->zfs_name + strlen(source);
2747                                 if (relpath[0] == '/')
2748                                         relpath++;
2749                         }
2750
2751                         if ((zpool_get_prop(zhp->zpool_hdl,
2752                             ZPOOL_PROP_ALTROOT, buf, MAXPATHLEN, NULL,
2753                             B_FALSE)) || (strcmp(root, "-") == 0))
2754                                 root[0] = '\0';
2755                         /*
2756                          * Special case an alternate root of '/'. This will
2757                          * avoid having multiple leading slashes in the
2758                          * mountpoint path.
2759                          */
2760                         if (strcmp(root, "/") == 0)
2761                                 root++;
2762
2763                         /*
2764                          * If the mountpoint is '/' then skip over this
2765                          * if we are obtaining either an alternate root or
2766                          * an inherited mountpoint.
2767                          */
2768                         if (str[1] == '\0' && (root[0] != '\0' ||
2769                             relpath[0] != '\0'))
2770                                 str++;
2771
2772                         if (relpath[0] == '\0')
2773                                 (void) snprintf(propbuf, proplen, "%s%s",
2774                                     root, str);
2775                         else
2776                                 (void) snprintf(propbuf, proplen, "%s%s%s%s",
2777                                     root, str, relpath[0] == '@' ? "" : "/",
2778                                     relpath);
2779                 } else {
2780                         /* 'legacy' or 'none' */
2781                         (void) strlcpy(propbuf, str, proplen);
2782                 }
2783                 zcp_check(zhp, prop, 0, propbuf);
2784                 break;
2785
2786         case ZFS_PROP_ORIGIN:
2787                 if (*zhp->zfs_dmustats.dds_origin != '\0') {
2788                         str = (char *)&zhp->zfs_dmustats.dds_origin;
2789                 } else {
2790                         str = getprop_string(zhp, prop, &source);
2791                 }
2792                 if (str == NULL || *str == '\0')
2793                         str = zfs_prop_default_string(prop);
2794                 if (str == NULL)
2795                         return (-1);
2796                 (void) strlcpy(propbuf, str, proplen);
2797                 zcp_check(zhp, prop, 0, str);
2798                 break;
2799
2800         case ZFS_PROP_REDACT_SNAPS:
2801                 if (get_rsnaps_string(zhp, propbuf, proplen) != 0)
2802                         return (-1);
2803                 break;
2804
2805         case ZFS_PROP_CLONES:
2806                 if (get_clones_string(zhp, propbuf, proplen) != 0)
2807                         return (-1);
2808                 break;
2809
2810         case ZFS_PROP_QUOTA:
2811         case ZFS_PROP_REFQUOTA:
2812         case ZFS_PROP_RESERVATION:
2813         case ZFS_PROP_REFRESERVATION:
2814
2815                 if (get_numeric_property(zhp, prop, src, &source, &val) != 0)
2816                         return (-1);
2817                 /*
2818                  * If quota or reservation is 0, we translate this into 'none'
2819                  * (unless literal is set), and indicate that it's the default
2820                  * value.  Otherwise, we print the number nicely and indicate
2821                  * that its set locally.
2822                  */
2823                 if (val == 0) {
2824                         if (literal)
2825                                 (void) strlcpy(propbuf, "0", proplen);
2826                         else
2827                                 (void) strlcpy(propbuf, "none", proplen);
2828                 } else {
2829                         if (literal)
2830                                 (void) snprintf(propbuf, proplen, "%llu",
2831                                     (u_longlong_t)val);
2832                         else
2833                                 zfs_nicebytes(val, propbuf, proplen);
2834                 }
2835                 zcp_check(zhp, prop, val, NULL);
2836                 break;
2837
2838         case ZFS_PROP_FILESYSTEM_LIMIT:
2839         case ZFS_PROP_SNAPSHOT_LIMIT:
2840         case ZFS_PROP_FILESYSTEM_COUNT:
2841         case ZFS_PROP_SNAPSHOT_COUNT:
2842
2843                 if (get_numeric_property(zhp, prop, src, &source, &val) != 0)
2844                         return (-1);
2845
2846                 /*
2847                  * If limit is UINT64_MAX, we translate this into 'none', and
2848                  * indicate that it's the default value. Otherwise, we print
2849                  * the number nicely and indicate that it's set locally.
2850                  */
2851                 if (val == UINT64_MAX) {
2852                         (void) strlcpy(propbuf, "none", proplen);
2853                 } else if (literal) {
2854                         (void) snprintf(propbuf, proplen, "%llu",
2855                             (u_longlong_t)val);
2856                 } else {
2857                         zfs_nicenum(val, propbuf, proplen);
2858                 }
2859
2860                 zcp_check(zhp, prop, val, NULL);
2861                 break;
2862
2863         case ZFS_PROP_REFRATIO:
2864         case ZFS_PROP_COMPRESSRATIO:
2865                 if (get_numeric_property(zhp, prop, src, &source, &val) != 0)
2866                         return (-1);
2867                 if (literal)
2868                         (void) snprintf(propbuf, proplen, "%llu.%02llu",
2869                             (u_longlong_t)(val / 100),
2870                             (u_longlong_t)(val % 100));
2871                 else
2872                         (void) snprintf(propbuf, proplen, "%llu.%02llux",
2873                             (u_longlong_t)(val / 100),
2874                             (u_longlong_t)(val % 100));
2875                 zcp_check(zhp, prop, val, NULL);
2876                 break;
2877
2878         case ZFS_PROP_TYPE:
2879                 switch (zhp->zfs_type) {
2880                 case ZFS_TYPE_FILESYSTEM:
2881                         str = "filesystem";
2882                         break;
2883                 case ZFS_TYPE_VOLUME:
2884                         str = "volume";
2885                         break;
2886                 case ZFS_TYPE_SNAPSHOT:
2887                         str = "snapshot";
2888                         break;
2889                 case ZFS_TYPE_BOOKMARK:
2890                         str = "bookmark";
2891                         break;
2892                 default:
2893                         abort();
2894                 }
2895                 (void) snprintf(propbuf, proplen, "%s", str);
2896                 zcp_check(zhp, prop, 0, propbuf);
2897                 break;
2898
2899         case ZFS_PROP_MOUNTED:
2900                 /*
2901                  * The 'mounted' property is a pseudo-property that described
2902                  * whether the filesystem is currently mounted.  Even though
2903                  * it's a boolean value, the typical values of "on" and "off"
2904                  * don't make sense, so we translate to "yes" and "no".
2905                  */
2906                 if (get_numeric_property(zhp, ZFS_PROP_MOUNTED,
2907                     src, &source, &val) != 0)
2908                         return (-1);
2909                 if (val)
2910                         (void) strlcpy(propbuf, "yes", proplen);
2911                 else
2912                         (void) strlcpy(propbuf, "no", proplen);
2913                 break;
2914
2915         case ZFS_PROP_NAME:
2916                 /*
2917                  * The 'name' property is a pseudo-property derived from the
2918                  * dataset name.  It is presented as a real property to simplify
2919                  * consumers.
2920                  */
2921                 (void) strlcpy(propbuf, zhp->zfs_name, proplen);
2922                 zcp_check(zhp, prop, 0, propbuf);
2923                 break;
2924
2925         case ZFS_PROP_MLSLABEL:
2926                 {
2927 #ifdef HAVE_MLSLABEL
2928                         m_label_t *new_sl = NULL;
2929                         char *ascii = NULL;     /* human readable label */
2930
2931                         (void) strlcpy(propbuf,
2932                             getprop_string(zhp, prop, &source), proplen);
2933
2934                         if (literal || (strcasecmp(propbuf,
2935                             ZFS_MLSLABEL_DEFAULT) == 0))
2936                                 break;
2937
2938                         /*
2939                          * Try to translate the internal hex string to
2940                          * human-readable output.  If there are any
2941                          * problems just use the hex string.
2942                          */
2943
2944                         if (str_to_label(propbuf, &new_sl, MAC_LABEL,
2945                             L_NO_CORRECTION, NULL) == -1) {
2946                                 m_label_free(new_sl);
2947                                 break;
2948                         }
2949
2950                         if (label_to_str(new_sl, &ascii, M_LABEL,
2951                             DEF_NAMES) != 0) {
2952                                 if (ascii)
2953                                         free(ascii);
2954                                 m_label_free(new_sl);
2955                                 break;
2956                         }
2957                         m_label_free(new_sl);
2958
2959                         (void) strlcpy(propbuf, ascii, proplen);
2960                         free(ascii);
2961 #else
2962                         (void) strlcpy(propbuf,
2963                             getprop_string(zhp, prop, &source), proplen);
2964 #endif /* HAVE_MLSLABEL */
2965                 }
2966                 break;
2967
2968         case ZFS_PROP_GUID:
2969         case ZFS_PROP_KEY_GUID:
2970         case ZFS_PROP_IVSET_GUID:
2971         case ZFS_PROP_CREATETXG:
2972         case ZFS_PROP_OBJSETID:
2973         case ZFS_PROP_PBKDF2_ITERS:
2974                 /*
2975                  * These properties are stored as numbers, but they are
2976                  * identifiers or counters.
2977                  * We don't want them to be pretty printed, because pretty
2978                  * printing truncates their values making them useless.
2979                  */
2980                 if (get_numeric_property(zhp, prop, src, &source, &val) != 0)
2981                         return (-1);
2982                 (void) snprintf(propbuf, proplen, "%llu", (u_longlong_t)val);
2983                 zcp_check(zhp, prop, val, NULL);
2984                 break;
2985
2986         case ZFS_PROP_REFERENCED:
2987         case ZFS_PROP_AVAILABLE:
2988         case ZFS_PROP_USED:
2989         case ZFS_PROP_USEDSNAP:
2990         case ZFS_PROP_USEDDS:
2991         case ZFS_PROP_USEDREFRESERV:
2992         case ZFS_PROP_USEDCHILD:
2993                 if (get_numeric_property(zhp, prop, src, &source, &val) != 0)
2994                         return (-1);
2995                 if (literal) {
2996                         (void) snprintf(propbuf, proplen, "%llu",
2997                             (u_longlong_t)val);
2998                 } else {
2999                         zfs_nicebytes(val, propbuf, proplen);
3000                 }
3001                 zcp_check(zhp, prop, val, NULL);
3002                 break;
3003
3004         case ZFS_PROP_SNAPSHOTS_CHANGED:
3005                 {
3006                         if ((get_numeric_property(zhp, prop, src, &source,
3007                             &val) != 0) || val == 0) {
3008                                 return (-1);
3009                         }
3010
3011                         time_t time = (time_t)val;
3012                         struct tm t;
3013
3014                         if (literal ||
3015                             localtime_r(&time, &t) == NULL ||
3016                             strftime(propbuf, proplen, "%a %b %e %k:%M:%S %Y",
3017                             &t) == 0)
3018                                 (void) snprintf(propbuf, proplen, "%llu",
3019                                     (u_longlong_t)val);
3020                 }
3021                 zcp_check(zhp, prop, val, NULL);
3022                 break;
3023
3024         default:
3025                 switch (zfs_prop_get_type(prop)) {
3026                 case PROP_TYPE_NUMBER:
3027                         if (get_numeric_property(zhp, prop, src,
3028                             &source, &val) != 0) {
3029                                 return (-1);
3030                         }
3031
3032                         if (literal) {
3033                                 (void) snprintf(propbuf, proplen, "%llu",
3034                                     (u_longlong_t)val);
3035                         } else {
3036                                 zfs_nicenum(val, propbuf, proplen);
3037                         }
3038                         zcp_check(zhp, prop, val, NULL);
3039                         break;
3040
3041                 case PROP_TYPE_STRING:
3042                         str = getprop_string(zhp, prop, &source);
3043                         if (str == NULL)
3044                                 return (-1);
3045
3046                         (void) strlcpy(propbuf, str, proplen);
3047                         zcp_check(zhp, prop, 0, str);
3048                         break;
3049
3050                 case PROP_TYPE_INDEX:
3051                         if (get_numeric_property(zhp, prop, src,
3052                             &source, &val) != 0)
3053                                 return (-1);
3054                         if (zfs_prop_index_to_string(prop, val, &strval) != 0)
3055                                 return (-1);
3056
3057                         (void) strlcpy(propbuf, strval, proplen);
3058                         zcp_check(zhp, prop, 0, strval);
3059                         break;
3060
3061                 default:
3062                         abort();
3063                 }
3064         }
3065
3066         get_source(zhp, src, source, statbuf, statlen);
3067
3068         return (0);
3069 }
3070
3071 /*
3072  * Utility function to get the given numeric property.  Does no validation that
3073  * the given property is the appropriate type; should only be used with
3074  * hard-coded property types.
3075  */
3076 uint64_t
3077 zfs_prop_get_int(zfs_handle_t *zhp, zfs_prop_t prop)
3078 {
3079         const char *source;
3080         uint64_t val = 0;
3081
3082         (void) get_numeric_property(zhp, prop, NULL, &source, &val);
3083
3084         return (val);
3085 }
3086
3087 static int
3088 zfs_prop_set_int(zfs_handle_t *zhp, zfs_prop_t prop, uint64_t val)
3089 {
3090         char buf[64];
3091
3092         (void) snprintf(buf, sizeof (buf), "%llu", (longlong_t)val);
3093         return (zfs_prop_set(zhp, zfs_prop_to_name(prop), buf));
3094 }
3095
3096 /*
3097  * Similar to zfs_prop_get(), but returns the value as an integer.
3098  */
3099 int
3100 zfs_prop_get_numeric(zfs_handle_t *zhp, zfs_prop_t prop, uint64_t *value,
3101     zprop_source_t *src, char *statbuf, size_t statlen)
3102 {
3103         const char *source;
3104
3105         /*
3106          * Check to see if this property applies to our object
3107          */
3108         if (!zfs_prop_valid_for_type(prop, zhp->zfs_type, B_FALSE)) {
3109                 return (zfs_error_fmt(zhp->zfs_hdl, EZFS_PROPTYPE,
3110                     dgettext(TEXT_DOMAIN, "cannot get property '%s'"),
3111                     zfs_prop_to_name(prop)));
3112         }
3113
3114         if (src)
3115                 *src = ZPROP_SRC_NONE;
3116
3117         if (get_numeric_property(zhp, prop, src, &source, value) != 0)
3118                 return (-1);
3119
3120         get_source(zhp, src, source, statbuf, statlen);
3121
3122         return (0);
3123 }
3124
3125 #ifdef HAVE_IDMAP
3126 static int
3127 idmap_id_to_numeric_domain_rid(uid_t id, boolean_t isuser,
3128     char **domainp, idmap_rid_t *ridp)
3129 {
3130         idmap_get_handle_t *get_hdl = NULL;
3131         idmap_stat status;
3132         int err = EINVAL;
3133
3134         if (idmap_get_create(&get_hdl) != IDMAP_SUCCESS)
3135                 goto out;
3136
3137         if (isuser) {
3138                 err = idmap_get_sidbyuid(get_hdl, id,
3139                     IDMAP_REQ_FLG_USE_CACHE, domainp, ridp, &status);
3140         } else {
3141                 err = idmap_get_sidbygid(get_hdl, id,
3142                     IDMAP_REQ_FLG_USE_CACHE, domainp, ridp, &status);
3143         }
3144         if (err == IDMAP_SUCCESS &&
3145             idmap_get_mappings(get_hdl) == IDMAP_SUCCESS &&
3146             status == IDMAP_SUCCESS)
3147                 err = 0;
3148         else
3149                 err = EINVAL;
3150 out:
3151         if (get_hdl)
3152                 idmap_get_destroy(get_hdl);
3153         return (err);
3154 }
3155 #endif /* HAVE_IDMAP */
3156
3157 /*
3158  * convert the propname into parameters needed by kernel
3159  * Eg: userquota@ahrens -> ZFS_PROP_USERQUOTA, "", 126829
3160  * Eg: userused@matt@domain -> ZFS_PROP_USERUSED, "S-1-123-456", 789
3161  * Eg: groupquota@staff -> ZFS_PROP_GROUPQUOTA, "", 1234
3162  * Eg: groupused@staff -> ZFS_PROP_GROUPUSED, "", 1234
3163  * Eg: projectquota@123 -> ZFS_PROP_PROJECTQUOTA, "", 123
3164  * Eg: projectused@789 -> ZFS_PROP_PROJECTUSED, "", 789
3165  */
3166 static int
3167 userquota_propname_decode(const char *propname, boolean_t zoned,
3168     zfs_userquota_prop_t *typep, char *domain, int domainlen, uint64_t *ridp)
3169 {
3170         zfs_userquota_prop_t type;
3171         char *cp;
3172         boolean_t isuser;
3173         boolean_t isgroup;
3174         boolean_t isproject;
3175         struct passwd *pw;
3176         struct group *gr;
3177
3178         domain[0] = '\0';
3179
3180         /* Figure out the property type ({user|group|project}{quota|space}) */
3181         for (type = 0; type < ZFS_NUM_USERQUOTA_PROPS; type++) {
3182                 if (strncmp(propname, zfs_userquota_prop_prefixes[type],
3183                     strlen(zfs_userquota_prop_prefixes[type])) == 0)
3184                         break;
3185         }
3186         if (type == ZFS_NUM_USERQUOTA_PROPS)
3187                 return (EINVAL);
3188         *typep = type;
3189
3190         isuser = (type == ZFS_PROP_USERQUOTA || type == ZFS_PROP_USERUSED ||
3191             type == ZFS_PROP_USEROBJQUOTA ||
3192             type == ZFS_PROP_USEROBJUSED);
3193         isgroup = (type == ZFS_PROP_GROUPQUOTA || type == ZFS_PROP_GROUPUSED ||
3194             type == ZFS_PROP_GROUPOBJQUOTA ||
3195             type == ZFS_PROP_GROUPOBJUSED);
3196         isproject = (type == ZFS_PROP_PROJECTQUOTA ||
3197             type == ZFS_PROP_PROJECTUSED || type == ZFS_PROP_PROJECTOBJQUOTA ||
3198             type == ZFS_PROP_PROJECTOBJUSED);
3199
3200         cp = strchr(propname, '@') + 1;
3201
3202         if (isuser &&
3203             getpwnam_r(cp, &gpwd, rpbuf, sizeof (rpbuf), &pw) == 0 &&
3204             pw != NULL) {
3205                 if (zoned && getzoneid() == GLOBAL_ZONEID)
3206                         return (ENOENT);
3207                 *ridp = pw->pw_uid;
3208         } else if (isgroup &&
3209             getgrnam_r(cp, &ggrp, rpbuf, sizeof (rpbuf), &gr) == 0 &&
3210             gr != NULL) {
3211                 if (zoned && getzoneid() == GLOBAL_ZONEID)
3212                         return (ENOENT);
3213                 *ridp = gr->gr_gid;
3214         } else if (!isproject && strchr(cp, '@')) {
3215 #ifdef HAVE_IDMAP
3216                 /*
3217                  * It's a SID name (eg "user@domain") that needs to be
3218                  * turned into S-1-domainID-RID.
3219                  */
3220                 directory_error_t e;
3221                 char *numericsid = NULL;
3222                 char *end;
3223
3224                 if (zoned && getzoneid() == GLOBAL_ZONEID)
3225                         return (ENOENT);
3226                 if (isuser) {
3227                         e = directory_sid_from_user_name(NULL,
3228                             cp, &numericsid);
3229                 } else {
3230                         e = directory_sid_from_group_name(NULL,
3231                             cp, &numericsid);
3232                 }
3233                 if (e != NULL) {
3234                         directory_error_free(e);
3235                         return (ENOENT);
3236                 }
3237                 if (numericsid == NULL)
3238                         return (ENOENT);
3239                 cp = numericsid;
3240                 (void) strlcpy(domain, cp, domainlen);
3241                 cp = strrchr(domain, '-');
3242                 *cp = '\0';
3243                 cp++;
3244
3245                 errno = 0;
3246                 *ridp = strtoull(cp, &end, 10);
3247                 free(numericsid);
3248
3249                 if (errno != 0 || *end != '\0')
3250                         return (EINVAL);
3251 #else
3252                 (void) domainlen;
3253                 return (ENOSYS);
3254 #endif /* HAVE_IDMAP */
3255         } else {
3256                 /* It's a user/group/project ID (eg "12345"). */
3257                 uid_t id;
3258                 char *end;
3259                 id = strtoul(cp, &end, 10);
3260                 if (*end != '\0')
3261                         return (EINVAL);
3262                 if (id > MAXUID && !isproject) {
3263 #ifdef HAVE_IDMAP
3264                         /* It's an ephemeral ID. */
3265                         idmap_rid_t rid;
3266                         char *mapdomain;
3267
3268                         if (idmap_id_to_numeric_domain_rid(id, isuser,
3269                             &mapdomain, &rid) != 0)
3270                                 return (ENOENT);
3271                         (void) strlcpy(domain, mapdomain, domainlen);
3272                         *ridp = rid;
3273 #else
3274                         return (ENOSYS);
3275 #endif /* HAVE_IDMAP */
3276                 } else {
3277                         *ridp = id;
3278                 }
3279         }
3280
3281         return (0);
3282 }
3283
3284 static int
3285 zfs_prop_get_userquota_common(zfs_handle_t *zhp, const char *propname,
3286     uint64_t *propvalue, zfs_userquota_prop_t *typep)
3287 {
3288         int err;
3289         zfs_cmd_t zc = {"\0"};
3290
3291         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
3292
3293         err = userquota_propname_decode(propname,
3294             zfs_prop_get_int(zhp, ZFS_PROP_ZONED),
3295             typep, zc.zc_value, sizeof (zc.zc_value), &zc.zc_guid);
3296         zc.zc_objset_type = *typep;
3297         if (err)
3298                 return (err);
3299
3300         err = zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_USERSPACE_ONE, &zc);
3301         if (err)
3302                 return (err);
3303
3304         *propvalue = zc.zc_cookie;
3305         return (0);
3306 }
3307
3308 int
3309 zfs_prop_get_userquota_int(zfs_handle_t *zhp, const char *propname,
3310     uint64_t *propvalue)
3311 {
3312         zfs_userquota_prop_t type;
3313
3314         return (zfs_prop_get_userquota_common(zhp, propname, propvalue,
3315             &type));
3316 }
3317
3318 int
3319 zfs_prop_get_userquota(zfs_handle_t *zhp, const char *propname,
3320     char *propbuf, int proplen, boolean_t literal)
3321 {
3322         int err;
3323         uint64_t propvalue;
3324         zfs_userquota_prop_t type;
3325
3326         err = zfs_prop_get_userquota_common(zhp, propname, &propvalue,
3327             &type);
3328
3329         if (err)
3330                 return (err);
3331
3332         if (literal) {
3333                 (void) snprintf(propbuf, proplen, "%llu",
3334                     (u_longlong_t)propvalue);
3335         } else if (propvalue == 0 &&
3336             (type == ZFS_PROP_USERQUOTA || type == ZFS_PROP_GROUPQUOTA ||
3337             type == ZFS_PROP_USEROBJQUOTA || type == ZFS_PROP_GROUPOBJQUOTA ||
3338             type == ZFS_PROP_PROJECTQUOTA ||
3339             type == ZFS_PROP_PROJECTOBJQUOTA)) {
3340                 (void) strlcpy(propbuf, "none", proplen);
3341         } else if (type == ZFS_PROP_USERQUOTA || type == ZFS_PROP_GROUPQUOTA ||
3342             type == ZFS_PROP_USERUSED || type == ZFS_PROP_GROUPUSED ||
3343             type == ZFS_PROP_PROJECTUSED || type == ZFS_PROP_PROJECTQUOTA) {
3344                 zfs_nicebytes(propvalue, propbuf, proplen);
3345         } else {
3346                 zfs_nicenum(propvalue, propbuf, proplen);
3347         }
3348         return (0);
3349 }
3350
3351 /*
3352  * propname must start with "written@" or "written#".
3353  */
3354 int
3355 zfs_prop_get_written_int(zfs_handle_t *zhp, const char *propname,
3356     uint64_t *propvalue)
3357 {
3358         int err;
3359         zfs_cmd_t zc = {"\0"};
3360         const char *snapname;
3361
3362         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
3363
3364         assert(zfs_prop_written(propname));
3365         snapname = propname + strlen("written@");
3366         if (strchr(snapname, '@') != NULL || strchr(snapname, '#') != NULL) {
3367                 /* full snapshot or bookmark name specified */
3368                 (void) strlcpy(zc.zc_value, snapname, sizeof (zc.zc_value));
3369         } else {
3370                 /* snapname is the short name, append it to zhp's fsname */
3371                 char *cp;
3372
3373                 (void) strlcpy(zc.zc_value, zhp->zfs_name,
3374                     sizeof (zc.zc_value));
3375                 cp = strchr(zc.zc_value, '@');
3376                 if (cp != NULL)
3377                         *cp = '\0';
3378                 (void) strlcat(zc.zc_value, snapname - 1, sizeof (zc.zc_value));
3379         }
3380
3381         err = zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_SPACE_WRITTEN, &zc);
3382         if (err)
3383                 return (err);
3384
3385         *propvalue = zc.zc_cookie;
3386         return (0);
3387 }
3388
3389 int
3390 zfs_prop_get_written(zfs_handle_t *zhp, const char *propname,
3391     char *propbuf, int proplen, boolean_t literal)
3392 {
3393         int err;
3394         uint64_t propvalue;
3395
3396         err = zfs_prop_get_written_int(zhp, propname, &propvalue);
3397
3398         if (err)
3399                 return (err);
3400
3401         if (literal) {
3402                 (void) snprintf(propbuf, proplen, "%llu",
3403                     (u_longlong_t)propvalue);
3404         } else {
3405                 zfs_nicebytes(propvalue, propbuf, proplen);
3406         }
3407
3408         return (0);
3409 }
3410
3411 /*
3412  * Returns the name of the given zfs handle.
3413  */
3414 const char *
3415 zfs_get_name(const zfs_handle_t *zhp)
3416 {
3417         return (zhp->zfs_name);
3418 }
3419
3420 /*
3421  * Returns the name of the parent pool for the given zfs handle.
3422  */
3423 const char *
3424 zfs_get_pool_name(const zfs_handle_t *zhp)
3425 {
3426         return (zhp->zpool_hdl->zpool_name);
3427 }
3428
3429 /*
3430  * Returns the type of the given zfs handle.
3431  */
3432 zfs_type_t
3433 zfs_get_type(const zfs_handle_t *zhp)
3434 {
3435         return (zhp->zfs_type);
3436 }
3437
3438 /*
3439  * Returns the type of the given zfs handle,
3440  * or, if a snapshot, the type of the snapshotted dataset.
3441  */
3442 zfs_type_t
3443 zfs_get_underlying_type(const zfs_handle_t *zhp)
3444 {
3445         return (zhp->zfs_head_type);
3446 }
3447
3448 /*
3449  * Is one dataset name a child dataset of another?
3450  *
3451  * Needs to handle these cases:
3452  * Dataset 1    "a/foo"         "a/foo"         "a/foo"         "a/foo"
3453  * Dataset 2    "a/fo"          "a/foobar"      "a/bar/baz"     "a/foo/bar"
3454  * Descendant?  No.             No.             No.             Yes.
3455  */
3456 static boolean_t
3457 is_descendant(const char *ds1, const char *ds2)
3458 {
3459         size_t d1len = strlen(ds1);
3460
3461         /* ds2 can't be a descendant if it's smaller */
3462         if (strlen(ds2) < d1len)
3463                 return (B_FALSE);
3464
3465         /* otherwise, compare strings and verify that there's a '/' char */
3466         return (ds2[d1len] == '/' && (strncmp(ds1, ds2, d1len) == 0));
3467 }
3468
3469 /*
3470  * Given a complete name, return just the portion that refers to the parent.
3471  * Will return -1 if there is no parent (path is just the name of the
3472  * pool).
3473  */
3474 static int
3475 parent_name(const char *path, char *buf, size_t buflen)
3476 {
3477         char *slashp;
3478
3479         (void) strlcpy(buf, path, buflen);
3480
3481         if ((slashp = strrchr(buf, '/')) == NULL)
3482                 return (-1);
3483         *slashp = '\0';
3484
3485         return (0);
3486 }
3487
3488 int
3489 zfs_parent_name(zfs_handle_t *zhp, char *buf, size_t buflen)
3490 {
3491         return (parent_name(zfs_get_name(zhp), buf, buflen));
3492 }
3493
3494 /*
3495  * If accept_ancestor is false, then check to make sure that the given path has
3496  * a parent, and that it exists.  If accept_ancestor is true, then find the
3497  * closest existing ancestor for the given path.  In prefixlen return the
3498  * length of already existing prefix of the given path.  We also fetch the
3499  * 'zoned' property, which is used to validate property settings when creating
3500  * new datasets.
3501  */
3502 static int
3503 check_parents(libzfs_handle_t *hdl, const char *path, uint64_t *zoned,
3504     boolean_t accept_ancestor, int *prefixlen)
3505 {
3506         zfs_cmd_t zc = {"\0"};
3507         char parent[ZFS_MAX_DATASET_NAME_LEN];
3508         char *slash;
3509         zfs_handle_t *zhp;
3510         char errbuf[ERRBUFLEN];
3511         uint64_t is_zoned;
3512
3513         (void) snprintf(errbuf, sizeof (errbuf),
3514             dgettext(TEXT_DOMAIN, "cannot create '%s'"), path);
3515
3516         /* get parent, and check to see if this is just a pool */
3517         if (parent_name(path, parent, sizeof (parent)) != 0) {
3518                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3519                     "missing dataset name"));
3520                 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3521         }
3522
3523         /* check to see if the pool exists */
3524         if ((slash = strchr(parent, '/')) == NULL)
3525                 slash = parent + strlen(parent);
3526         (void) strlcpy(zc.zc_name, parent,
3527             MIN(sizeof (zc.zc_name), slash - parent + 1));
3528         if (zfs_ioctl(hdl, ZFS_IOC_OBJSET_STATS, &zc) != 0 &&
3529             errno == ENOENT) {
3530                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3531                     "no such pool '%s'"), zc.zc_name);
3532                 return (zfs_error(hdl, EZFS_NOENT, errbuf));
3533         }
3534
3535         /* check to see if the parent dataset exists */
3536         while ((zhp = make_dataset_handle(hdl, parent)) == NULL) {
3537                 if (errno == ENOENT && accept_ancestor) {
3538                         /*
3539                          * Go deeper to find an ancestor, give up on top level.
3540                          */
3541                         if (parent_name(parent, parent, sizeof (parent)) != 0) {
3542                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3543                                     "no such pool '%s'"), zc.zc_name);
3544                                 return (zfs_error(hdl, EZFS_NOENT, errbuf));
3545                         }
3546                 } else if (errno == ENOENT) {
3547                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3548                             "parent does not exist"));
3549                         return (zfs_error(hdl, EZFS_NOENT, errbuf));
3550                 } else
3551                         return (zfs_standard_error(hdl, errno, errbuf));
3552         }
3553
3554         is_zoned = zfs_prop_get_int(zhp, ZFS_PROP_ZONED);
3555         if (zoned != NULL)
3556                 *zoned = is_zoned;
3557
3558         /* we are in a non-global zone, but parent is in the global zone */
3559         if (getzoneid() != GLOBAL_ZONEID && !is_zoned) {
3560                 (void) zfs_standard_error(hdl, EPERM, errbuf);
3561                 zfs_close(zhp);
3562                 return (-1);
3563         }
3564
3565         /* make sure parent is a filesystem */
3566         if (zfs_get_type(zhp) != ZFS_TYPE_FILESYSTEM) {
3567                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3568                     "parent is not a filesystem"));
3569                 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf);
3570                 zfs_close(zhp);
3571                 return (-1);
3572         }
3573
3574         zfs_close(zhp);
3575         if (prefixlen != NULL)
3576                 *prefixlen = strlen(parent);
3577         return (0);
3578 }
3579
3580 /*
3581  * Finds whether the dataset of the given type(s) exists.
3582  */
3583 boolean_t
3584 zfs_dataset_exists(libzfs_handle_t *hdl, const char *path, zfs_type_t types)
3585 {
3586         zfs_handle_t *zhp;
3587
3588         if (!zfs_validate_name(hdl, path, types, B_FALSE))
3589                 return (B_FALSE);
3590
3591         /*
3592          * Try to get stats for the dataset, which will tell us if it exists.
3593          */
3594         if ((zhp = make_dataset_handle(hdl, path)) != NULL) {
3595                 int ds_type = zhp->zfs_type;
3596
3597                 zfs_close(zhp);
3598                 if (types & ds_type)
3599                         return (B_TRUE);
3600         }
3601         return (B_FALSE);
3602 }
3603
3604 /*
3605  * Given a path to 'target', create all the ancestors between
3606  * the prefixlen portion of the path, and the target itself.
3607  * Fail if the initial prefixlen-ancestor does not already exist.
3608  */
3609 int
3610 create_parents(libzfs_handle_t *hdl, char *target, int prefixlen)
3611 {
3612         zfs_handle_t *h;
3613         char *cp;
3614         const char *opname;
3615
3616         /* make sure prefix exists */
3617         cp = target + prefixlen;
3618         if (*cp != '/') {
3619                 assert(strchr(cp, '/') == NULL);
3620                 h = zfs_open(hdl, target, ZFS_TYPE_FILESYSTEM);
3621         } else {
3622                 *cp = '\0';
3623                 h = zfs_open(hdl, target, ZFS_TYPE_FILESYSTEM);
3624                 *cp = '/';
3625         }
3626         if (h == NULL)
3627                 return (-1);
3628         zfs_close(h);
3629
3630         /*
3631          * Attempt to create, mount, and share any ancestor filesystems,
3632          * up to the prefixlen-long one.
3633          */
3634         for (cp = target + prefixlen + 1;
3635             (cp = strchr(cp, '/')) != NULL; *cp = '/', cp++) {
3636
3637                 *cp = '\0';
3638
3639                 h = make_dataset_handle(hdl, target);
3640                 if (h) {
3641                         /* it already exists, nothing to do here */
3642                         zfs_close(h);
3643                         continue;
3644                 }
3645
3646                 if (zfs_create(hdl, target, ZFS_TYPE_FILESYSTEM,
3647                     NULL) != 0) {
3648                         opname = dgettext(TEXT_DOMAIN, "create");
3649                         goto ancestorerr;
3650                 }
3651
3652                 h = zfs_open(hdl, target, ZFS_TYPE_FILESYSTEM);
3653                 if (h == NULL) {
3654                         opname = dgettext(TEXT_DOMAIN, "open");
3655                         goto ancestorerr;
3656                 }
3657
3658                 if (zfs_mount(h, NULL, 0) != 0) {
3659                         opname = dgettext(TEXT_DOMAIN, "mount");
3660                         goto ancestorerr;
3661                 }
3662
3663                 if (zfs_share(h, NULL) != 0) {
3664                         opname = dgettext(TEXT_DOMAIN, "share");
3665                         goto ancestorerr;
3666                 }
3667
3668                 zfs_close(h);
3669         }
3670         zfs_commit_shares(NULL);
3671
3672         return (0);
3673
3674 ancestorerr:
3675         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3676             "failed to %s ancestor '%s'"), opname, target);
3677         return (-1);
3678 }
3679
3680 /*
3681  * Creates non-existing ancestors of the given path.
3682  */
3683 int
3684 zfs_create_ancestors(libzfs_handle_t *hdl, const char *path)
3685 {
3686         int prefix;
3687         char *path_copy;
3688         char errbuf[ERRBUFLEN];
3689         int rc = 0;
3690
3691         (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3692             "cannot create '%s'"), path);
3693
3694         /*
3695          * Check that we are not passing the nesting limit
3696          * before we start creating any ancestors.
3697          */
3698         if (dataset_nestcheck(path) != 0) {
3699                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3700                     "maximum name nesting depth exceeded"));
3701                 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3702         }
3703
3704         if (check_parents(hdl, path, NULL, B_TRUE, &prefix) != 0)
3705                 return (-1);
3706
3707         if ((path_copy = strdup(path)) != NULL) {
3708                 rc = create_parents(hdl, path_copy, prefix);
3709                 free(path_copy);
3710         }
3711         if (path_copy == NULL || rc != 0)
3712                 return (-1);
3713
3714         return (0);
3715 }
3716
3717 /*
3718  * Create a new filesystem or volume.
3719  */
3720 int
3721 zfs_create(libzfs_handle_t *hdl, const char *path, zfs_type_t type,
3722     nvlist_t *props)
3723 {
3724         int ret;
3725         uint64_t size = 0;
3726         uint64_t blocksize = zfs_prop_default_numeric(ZFS_PROP_VOLBLOCKSIZE);
3727         uint64_t zoned;
3728         enum lzc_dataset_type ost;
3729         zpool_handle_t *zpool_handle;
3730         uint8_t *wkeydata = NULL;
3731         uint_t wkeylen = 0;
3732         char errbuf[ERRBUFLEN];
3733         char parent[ZFS_MAX_DATASET_NAME_LEN];
3734
3735         (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3736             "cannot create '%s'"), path);
3737
3738         /* validate the path, taking care to note the extended error message */
3739         if (!zfs_validate_name(hdl, path, type, B_TRUE))
3740                 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3741
3742         if (dataset_nestcheck(path) != 0) {
3743                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3744                     "maximum name nesting depth exceeded"));
3745                 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3746         }
3747
3748         /* validate parents exist */
3749         if (check_parents(hdl, path, &zoned, B_FALSE, NULL) != 0)
3750                 return (-1);
3751
3752         /*
3753          * The failure modes when creating a dataset of a different type over
3754          * one that already exists is a little strange.  In particular, if you
3755          * try to create a dataset on top of an existing dataset, the ioctl()
3756          * will return ENOENT, not EEXIST.  To prevent this from happening, we
3757          * first try to see if the dataset exists.
3758          */
3759         if (zfs_dataset_exists(hdl, path, ZFS_TYPE_DATASET)) {
3760                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3761                     "dataset already exists"));
3762                 return (zfs_error(hdl, EZFS_EXISTS, errbuf));
3763         }
3764
3765         if (type == ZFS_TYPE_VOLUME)
3766                 ost = LZC_DATSET_TYPE_ZVOL;
3767         else
3768                 ost = LZC_DATSET_TYPE_ZFS;
3769
3770         /* open zpool handle for prop validation */
3771         char pool_path[ZFS_MAX_DATASET_NAME_LEN];
3772         (void) strlcpy(pool_path, path, sizeof (pool_path));
3773
3774         /* truncate pool_path at first slash */
3775         char *p = strchr(pool_path, '/');
3776         if (p != NULL)
3777                 *p = '\0';
3778
3779         if ((zpool_handle = zpool_open(hdl, pool_path)) == NULL)
3780                 return (-1);
3781
3782         if (props && (props = zfs_valid_proplist(hdl, type, props,
3783             zoned, NULL, zpool_handle, B_TRUE, errbuf)) == 0) {
3784                 zpool_close(zpool_handle);
3785                 return (-1);
3786         }
3787         zpool_close(zpool_handle);
3788
3789         if (type == ZFS_TYPE_VOLUME) {
3790                 /*
3791                  * If we are creating a volume, the size and block size must
3792                  * satisfy a few restraints.  First, the blocksize must be a
3793                  * valid block size between SPA_{MIN,MAX}BLOCKSIZE.  Second, the
3794                  * volsize must be a multiple of the block size, and cannot be
3795                  * zero.
3796                  */
3797                 if (props == NULL || nvlist_lookup_uint64(props,
3798                     zfs_prop_to_name(ZFS_PROP_VOLSIZE), &size) != 0) {
3799                         nvlist_free(props);
3800                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3801                             "missing volume size"));
3802                         return (zfs_error(hdl, EZFS_BADPROP, errbuf));
3803                 }
3804
3805                 if ((ret = nvlist_lookup_uint64(props,
3806                     zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE),
3807                     &blocksize)) != 0) {
3808                         if (ret == ENOENT) {
3809                                 blocksize = zfs_prop_default_numeric(
3810                                     ZFS_PROP_VOLBLOCKSIZE);
3811                         } else {
3812                                 nvlist_free(props);
3813                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3814                                     "missing volume block size"));
3815                                 return (zfs_error(hdl, EZFS_BADPROP, errbuf));
3816                         }
3817                 }
3818
3819                 if (size == 0) {
3820                         nvlist_free(props);
3821                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3822                             "volume size cannot be zero"));
3823                         return (zfs_error(hdl, EZFS_BADPROP, errbuf));
3824                 }
3825
3826                 if (size % blocksize != 0) {
3827                         nvlist_free(props);
3828                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3829                             "volume size must be a multiple of volume block "
3830                             "size"));
3831                         return (zfs_error(hdl, EZFS_BADPROP, errbuf));
3832                 }
3833         }
3834
3835         (void) parent_name(path, parent, sizeof (parent));
3836         if (zfs_crypto_create(hdl, parent, props, NULL, B_TRUE,
3837             &wkeydata, &wkeylen) != 0) {
3838                 nvlist_free(props);
3839                 return (zfs_error(hdl, EZFS_CRYPTOFAILED, errbuf));
3840         }
3841
3842         /* create the dataset */
3843         ret = lzc_create(path, ost, props, wkeydata, wkeylen);
3844         nvlist_free(props);
3845         if (wkeydata != NULL)
3846                 free(wkeydata);
3847
3848         /* check for failure */
3849         if (ret != 0) {
3850                 switch (errno) {
3851                 case ENOENT:
3852                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3853                             "no such parent '%s'"), parent);
3854                         return (zfs_error(hdl, EZFS_NOENT, errbuf));
3855
3856                 case ENOTSUP:
3857                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3858                             "pool must be upgraded to set this "
3859                             "property or value"));
3860                         return (zfs_error(hdl, EZFS_BADVERSION, errbuf));
3861
3862                 case EACCES:
3863                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3864                             "encryption root's key is not loaded "
3865                             "or provided"));
3866                         return (zfs_error(hdl, EZFS_CRYPTOFAILED, errbuf));
3867
3868                 case ERANGE:
3869                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3870                             "invalid property value(s) specified"));
3871                         return (zfs_error(hdl, EZFS_BADPROP, errbuf));
3872 #ifdef _ILP32
3873                 case EOVERFLOW:
3874                         /*
3875                          * This platform can't address a volume this big.
3876                          */
3877                         if (type == ZFS_TYPE_VOLUME)
3878                                 return (zfs_error(hdl, EZFS_VOLTOOBIG,
3879                                     errbuf));
3880                         zfs_fallthrough;
3881 #endif
3882                 default:
3883                         return (zfs_standard_error(hdl, errno, errbuf));
3884                 }
3885         }
3886
3887         return (0);
3888 }
3889
3890 /*
3891  * Destroys the given dataset.  The caller must make sure that the filesystem
3892  * isn't mounted, and that there are no active dependents. If the file system
3893  * does not exist this function does nothing.
3894  */
3895 int
3896 zfs_destroy(zfs_handle_t *zhp, boolean_t defer)
3897 {
3898         int error;
3899
3900         if (zhp->zfs_type != ZFS_TYPE_SNAPSHOT && defer)
3901                 return (EINVAL);
3902
3903         if (zhp->zfs_type == ZFS_TYPE_BOOKMARK) {
3904                 nvlist_t *nv = fnvlist_alloc();
3905                 fnvlist_add_boolean(nv, zhp->zfs_name);
3906                 error = lzc_destroy_bookmarks(nv, NULL);
3907                 fnvlist_free(nv);
3908                 if (error != 0) {
3909                         return (zfs_standard_error_fmt(zhp->zfs_hdl, error,
3910                             dgettext(TEXT_DOMAIN, "cannot destroy '%s'"),
3911                             zhp->zfs_name));
3912                 }
3913                 return (0);
3914         }
3915
3916         if (zhp->zfs_type == ZFS_TYPE_SNAPSHOT) {
3917                 nvlist_t *nv = fnvlist_alloc();
3918                 fnvlist_add_boolean(nv, zhp->zfs_name);
3919                 error = lzc_destroy_snaps(nv, defer, NULL);
3920                 fnvlist_free(nv);
3921         } else {
3922                 error = lzc_destroy(zhp->zfs_name);
3923         }
3924
3925         if (error != 0 && error != ENOENT) {
3926                 return (zfs_standard_error_fmt(zhp->zfs_hdl, errno,
3927                     dgettext(TEXT_DOMAIN, "cannot destroy '%s'"),
3928                     zhp->zfs_name));
3929         }
3930
3931         remove_mountpoint(zhp);
3932
3933         return (0);
3934 }
3935
3936 struct destroydata {
3937         nvlist_t *nvl;
3938         const char *snapname;
3939 };
3940
3941 static int
3942 zfs_check_snap_cb(zfs_handle_t *zhp, void *arg)
3943 {
3944         struct destroydata *dd = arg;
3945         char name[ZFS_MAX_DATASET_NAME_LEN];
3946         int rv = 0;
3947
3948         if (snprintf(name, sizeof (name), "%s@%s", zhp->zfs_name,
3949             dd->snapname) >= sizeof (name))
3950                 return (EINVAL);
3951
3952         if (lzc_exists(name))
3953                 fnvlist_add_boolean(dd->nvl, name);
3954
3955         rv = zfs_iter_filesystems_v2(zhp, 0, zfs_check_snap_cb, dd);
3956         zfs_close(zhp);
3957         return (rv);
3958 }
3959
3960 /*
3961  * Destroys all snapshots with the given name in zhp & descendants.
3962  */
3963 int
3964 zfs_destroy_snaps(zfs_handle_t *zhp, char *snapname, boolean_t defer)
3965 {
3966         int ret;
3967         struct destroydata dd = { 0 };
3968
3969         dd.snapname = snapname;
3970         dd.nvl = fnvlist_alloc();
3971         (void) zfs_check_snap_cb(zfs_handle_dup(zhp), &dd);
3972
3973         if (nvlist_empty(dd.nvl)) {
3974                 ret = zfs_standard_error_fmt(zhp->zfs_hdl, ENOENT,
3975                     dgettext(TEXT_DOMAIN, "cannot destroy '%s@%s'"),
3976                     zhp->zfs_name, snapname);
3977         } else {
3978                 ret = zfs_destroy_snaps_nvl(zhp->zfs_hdl, dd.nvl, defer);
3979         }
3980         fnvlist_free(dd.nvl);
3981         return (ret);
3982 }
3983
3984 /*
3985  * Destroys all the snapshots named in the nvlist.
3986  */
3987 int
3988 zfs_destroy_snaps_nvl(libzfs_handle_t *hdl, nvlist_t *snaps, boolean_t defer)
3989 {
3990         nvlist_t *errlist = NULL;
3991         nvpair_t *pair;
3992
3993         int ret = zfs_destroy_snaps_nvl_os(hdl, snaps);
3994         if (ret != 0)
3995                 return (ret);
3996
3997         ret = lzc_destroy_snaps(snaps, defer, &errlist);
3998
3999         if (ret == 0) {
4000                 nvlist_free(errlist);
4001                 return (0);
4002         }
4003
4004         if (nvlist_empty(errlist)) {
4005                 char errbuf[ERRBUFLEN];
4006                 (void) snprintf(errbuf, sizeof (errbuf),
4007                     dgettext(TEXT_DOMAIN, "cannot destroy snapshots"));
4008
4009                 ret = zfs_standard_error(hdl, ret, errbuf);
4010         }
4011         for (pair = nvlist_next_nvpair(errlist, NULL);
4012             pair != NULL; pair = nvlist_next_nvpair(errlist, pair)) {
4013                 char errbuf[ERRBUFLEN];
4014                 (void) snprintf(errbuf, sizeof (errbuf),
4015                     dgettext(TEXT_DOMAIN, "cannot destroy snapshot %s"),
4016                     nvpair_name(pair));
4017
4018                 switch (fnvpair_value_int32(pair)) {
4019                 case EEXIST:
4020                         zfs_error_aux(hdl,
4021                             dgettext(TEXT_DOMAIN, "snapshot is cloned"));
4022                         ret = zfs_error(hdl, EZFS_EXISTS, errbuf);
4023                         break;
4024                 default:
4025                         ret = zfs_standard_error(hdl, errno, errbuf);
4026                         break;
4027                 }
4028         }
4029
4030         nvlist_free(errlist);
4031         return (ret);
4032 }
4033
4034 /*
4035  * Clones the given dataset.  The target must be of the same type as the source.
4036  */
4037 int
4038 zfs_clone(zfs_handle_t *zhp, const char *target, nvlist_t *props)
4039 {
4040         char parent[ZFS_MAX_DATASET_NAME_LEN];
4041         int ret;
4042         char errbuf[ERRBUFLEN];
4043         libzfs_handle_t *hdl = zhp->zfs_hdl;
4044         uint64_t zoned;
4045
4046         assert(zhp->zfs_type == ZFS_TYPE_SNAPSHOT);
4047
4048         (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
4049             "cannot create '%s'"), target);
4050
4051         /* validate the target/clone name */
4052         if (!zfs_validate_name(hdl, target, ZFS_TYPE_FILESYSTEM, B_TRUE))
4053                 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
4054
4055         /* validate parents exist */
4056         if (check_parents(hdl, target, &zoned, B_FALSE, NULL) != 0)
4057                 return (-1);
4058
4059         (void) parent_name(target, parent, sizeof (parent));
4060
4061         /* do the clone */
4062
4063         if (props) {
4064                 zfs_type_t type = ZFS_TYPE_FILESYSTEM;
4065
4066                 if (ZFS_IS_VOLUME(zhp))
4067                         type = ZFS_TYPE_VOLUME;
4068                 if ((props = zfs_valid_proplist(hdl, type, props, zoned,
4069                     zhp, zhp->zpool_hdl, B_TRUE, errbuf)) == NULL)
4070                         return (-1);
4071                 if (zfs_fix_auto_resv(zhp, props) == -1) {
4072                         nvlist_free(props);
4073                         return (-1);
4074                 }
4075         }
4076
4077         if (zfs_crypto_clone_check(hdl, zhp, parent, props) != 0) {
4078                 nvlist_free(props);
4079                 return (zfs_error(hdl, EZFS_CRYPTOFAILED, errbuf));
4080         }
4081
4082         ret = lzc_clone(target, zhp->zfs_name, props);
4083         nvlist_free(props);
4084
4085         if (ret != 0) {
4086                 switch (errno) {
4087
4088                 case ENOENT:
4089                         /*
4090                          * The parent doesn't exist.  We should have caught this
4091                          * above, but there may a race condition that has since
4092                          * destroyed the parent.
4093                          *
4094                          * At this point, we don't know whether it's the source
4095                          * that doesn't exist anymore, or whether the target
4096                          * dataset doesn't exist.
4097                          */
4098                         zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN,
4099                             "no such parent '%s'"), parent);
4100                         return (zfs_error(zhp->zfs_hdl, EZFS_NOENT, errbuf));
4101
4102                 case EXDEV:
4103                         zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN,
4104                             "source and target pools differ"));
4105                         return (zfs_error(zhp->zfs_hdl, EZFS_CROSSTARGET,
4106                             errbuf));
4107
4108                 default:
4109                         return (zfs_standard_error(zhp->zfs_hdl, errno,
4110                             errbuf));
4111                 }
4112         }
4113
4114         return (ret);
4115 }
4116
4117 /*
4118  * Promotes the given clone fs to be the clone parent.
4119  */
4120 int
4121 zfs_promote(zfs_handle_t *zhp)
4122 {
4123         libzfs_handle_t *hdl = zhp->zfs_hdl;
4124         char snapname[ZFS_MAX_DATASET_NAME_LEN];
4125         int ret;
4126         char errbuf[ERRBUFLEN];
4127
4128         (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
4129             "cannot promote '%s'"), zhp->zfs_name);
4130
4131         if (zhp->zfs_type == ZFS_TYPE_SNAPSHOT) {
4132                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4133                     "snapshots can not be promoted"));
4134                 return (zfs_error(hdl, EZFS_BADTYPE, errbuf));
4135         }
4136
4137         if (zhp->zfs_dmustats.dds_origin[0] == '\0') {
4138                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4139                     "not a cloned filesystem"));
4140                 return (zfs_error(hdl, EZFS_BADTYPE, errbuf));
4141         }
4142
4143         if (!zfs_validate_name(hdl, zhp->zfs_name, zhp->zfs_type, B_TRUE))
4144                 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
4145
4146         ret = lzc_promote(zhp->zfs_name, snapname, sizeof (snapname));
4147
4148         if (ret != 0) {
4149                 switch (ret) {
4150                 case EACCES:
4151                         /*
4152                          * Promoting encrypted dataset outside its
4153                          * encryption root.
4154                          */
4155                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4156                             "cannot promote dataset outside its "
4157                             "encryption root"));
4158                         return (zfs_error(hdl, EZFS_EXISTS, errbuf));
4159
4160                 case EEXIST:
4161                         /* There is a conflicting snapshot name. */
4162                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4163                             "conflicting snapshot '%s' from parent '%s'"),
4164                             snapname, zhp->zfs_dmustats.dds_origin);
4165                         return (zfs_error(hdl, EZFS_EXISTS, errbuf));
4166
4167                 default:
4168                         return (zfs_standard_error(hdl, ret, errbuf));
4169                 }
4170         }
4171         return (ret);
4172 }
4173
4174 typedef struct snapdata {
4175         nvlist_t *sd_nvl;
4176         const char *sd_snapname;
4177 } snapdata_t;
4178
4179 static int
4180 zfs_snapshot_cb(zfs_handle_t *zhp, void *arg)
4181 {
4182         snapdata_t *sd = arg;
4183         char name[ZFS_MAX_DATASET_NAME_LEN];
4184         int rv = 0;
4185
4186         if (zfs_prop_get_int(zhp, ZFS_PROP_INCONSISTENT) == 0) {
4187                 if (snprintf(name, sizeof (name), "%s@%s", zfs_get_name(zhp),
4188                     sd->sd_snapname) >= sizeof (name))
4189                         return (EINVAL);
4190
4191                 fnvlist_add_boolean(sd->sd_nvl, name);
4192
4193                 rv = zfs_iter_filesystems_v2(zhp, 0, zfs_snapshot_cb, sd);
4194         }
4195         zfs_close(zhp);
4196
4197         return (rv);
4198 }
4199
4200 /*
4201  * Creates snapshots.  The keys in the snaps nvlist are the snapshots to be
4202  * created.
4203  */
4204 int
4205 zfs_snapshot_nvl(libzfs_handle_t *hdl, nvlist_t *snaps, nvlist_t *props)
4206 {
4207         int ret;
4208         char errbuf[ERRBUFLEN];
4209         nvpair_t *elem;
4210         nvlist_t *errors;
4211         zpool_handle_t *zpool_hdl;
4212         char pool[ZFS_MAX_DATASET_NAME_LEN];
4213
4214         (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
4215             "cannot create snapshots "));
4216
4217         elem = NULL;
4218         while ((elem = nvlist_next_nvpair(snaps, elem)) != NULL) {
4219                 const char *snapname = nvpair_name(elem);
4220
4221                 /* validate the target name */
4222                 if (!zfs_validate_name(hdl, snapname, ZFS_TYPE_SNAPSHOT,
4223                     B_TRUE)) {
4224                         (void) snprintf(errbuf, sizeof (errbuf),
4225                             dgettext(TEXT_DOMAIN,
4226                             "cannot create snapshot '%s'"), snapname);
4227                         return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
4228                 }
4229         }
4230
4231         /*
4232          * get pool handle for prop validation. assumes all snaps are in the
4233          * same pool, as does lzc_snapshot (below).
4234          */
4235         elem = nvlist_next_nvpair(snaps, NULL);
4236         if (elem == NULL)
4237                 return (-1);
4238         (void) strlcpy(pool, nvpair_name(elem), sizeof (pool));
4239         pool[strcspn(pool, "/@")] = '\0';
4240         zpool_hdl = zpool_open(hdl, pool);
4241         if (zpool_hdl == NULL)
4242                 return (-1);
4243
4244         if (props != NULL &&
4245             (props = zfs_valid_proplist(hdl, ZFS_TYPE_SNAPSHOT,
4246             props, B_FALSE, NULL, zpool_hdl, B_FALSE, errbuf)) == NULL) {
4247                 zpool_close(zpool_hdl);
4248                 return (-1);
4249         }
4250         zpool_close(zpool_hdl);
4251
4252         ret = lzc_snapshot(snaps, props, &errors);
4253
4254         if (ret != 0) {
4255                 boolean_t printed = B_FALSE;
4256                 for (elem = nvlist_next_nvpair(errors, NULL);
4257                     elem != NULL;
4258                     elem = nvlist_next_nvpair(errors, elem)) {
4259                         (void) snprintf(errbuf, sizeof (errbuf),
4260                             dgettext(TEXT_DOMAIN,
4261                             "cannot create snapshot '%s'"), nvpair_name(elem));
4262                         (void) zfs_standard_error(hdl,
4263                             fnvpair_value_int32(elem), errbuf);
4264                         printed = B_TRUE;
4265                 }
4266                 if (!printed) {
4267                         switch (ret) {
4268                         case EXDEV:
4269                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4270                                     "multiple snapshots of same "
4271                                     "fs not allowed"));
4272                                 (void) zfs_error(hdl, EZFS_EXISTS, errbuf);
4273
4274                                 break;
4275                         default:
4276                                 (void) zfs_standard_error(hdl, ret, errbuf);
4277                         }
4278                 }
4279         }
4280
4281         nvlist_free(props);
4282         nvlist_free(errors);
4283         return (ret);
4284 }
4285
4286 int
4287 zfs_snapshot(libzfs_handle_t *hdl, const char *path, boolean_t recursive,
4288     nvlist_t *props)
4289 {
4290         int ret;
4291         snapdata_t sd = { 0 };
4292         char fsname[ZFS_MAX_DATASET_NAME_LEN];
4293         char *cp;
4294         zfs_handle_t *zhp;
4295         char errbuf[ERRBUFLEN];
4296
4297         (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
4298             "cannot snapshot %s"), path);
4299
4300         if (!zfs_validate_name(hdl, path, ZFS_TYPE_SNAPSHOT, B_TRUE))
4301                 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
4302
4303         (void) strlcpy(fsname, path, sizeof (fsname));
4304         cp = strchr(fsname, '@');
4305         *cp = '\0';
4306         sd.sd_snapname = cp + 1;
4307
4308         if ((zhp = zfs_open(hdl, fsname, ZFS_TYPE_FILESYSTEM |
4309             ZFS_TYPE_VOLUME)) == NULL) {
4310                 return (-1);
4311         }
4312
4313         sd.sd_nvl = fnvlist_alloc();
4314         if (recursive) {
4315                 (void) zfs_snapshot_cb(zfs_handle_dup(zhp), &sd);
4316         } else {
4317                 fnvlist_add_boolean(sd.sd_nvl, path);
4318         }
4319
4320         ret = zfs_snapshot_nvl(hdl, sd.sd_nvl, props);
4321         fnvlist_free(sd.sd_nvl);
4322         zfs_close(zhp);
4323         return (ret);
4324 }
4325
4326 /*
4327  * Destroy any more recent snapshots.  We invoke this callback on any dependents
4328  * of the snapshot first.  If the 'cb_dependent' member is non-zero, then this
4329  * is a dependent and we should just destroy it without checking the transaction
4330  * group.
4331  */
4332 typedef struct rollback_data {
4333         const char      *cb_target;             /* the snapshot */
4334         uint64_t        cb_create;              /* creation time reference */
4335         boolean_t       cb_error;
4336         boolean_t       cb_force;
4337 } rollback_data_t;
4338
4339 static int
4340 rollback_destroy_dependent(zfs_handle_t *zhp, void *data)
4341 {
4342         rollback_data_t *cbp = data;
4343         prop_changelist_t *clp;
4344
4345         /* We must destroy this clone; first unmount it */
4346         clp = changelist_gather(zhp, ZFS_PROP_NAME, 0,
4347             cbp->cb_force ? MS_FORCE: 0);
4348         if (clp == NULL || changelist_prefix(clp) != 0) {
4349                 cbp->cb_error = B_TRUE;
4350                 zfs_close(zhp);
4351                 return (0);
4352         }
4353         if (zfs_destroy(zhp, B_FALSE) != 0)
4354                 cbp->cb_error = B_TRUE;
4355         else
4356                 changelist_remove(clp, zhp->zfs_name);
4357         (void) changelist_postfix(clp);
4358         changelist_free(clp);
4359
4360         zfs_close(zhp);
4361         return (0);
4362 }
4363
4364 static int
4365 rollback_destroy(zfs_handle_t *zhp, void *data)
4366 {
4367         rollback_data_t *cbp = data;
4368
4369         if (zfs_prop_get_int(zhp, ZFS_PROP_CREATETXG) > cbp->cb_create) {
4370                 cbp->cb_error |= zfs_iter_dependents_v2(zhp, 0, B_FALSE,
4371                     rollback_destroy_dependent, cbp);
4372
4373                 cbp->cb_error |= zfs_destroy(zhp, B_FALSE);
4374         }
4375
4376         zfs_close(zhp);
4377         return (0);
4378 }
4379
4380 /*
4381  * Given a dataset, rollback to a specific snapshot, discarding any
4382  * data changes since then and making it the active dataset.
4383  *
4384  * Any snapshots and bookmarks more recent than the target are
4385  * destroyed, along with their dependents (i.e. clones).
4386  */
4387 int
4388 zfs_rollback(zfs_handle_t *zhp, zfs_handle_t *snap, boolean_t force)
4389 {
4390         rollback_data_t cb = { 0 };
4391         int err;
4392         boolean_t restore_resv = 0;
4393         uint64_t old_volsize = 0, new_volsize;
4394         zfs_prop_t resv_prop = { 0 };
4395         uint64_t min_txg = 0;
4396
4397         assert(zhp->zfs_type == ZFS_TYPE_FILESYSTEM ||
4398             zhp->zfs_type == ZFS_TYPE_VOLUME);
4399
4400         /*
4401          * Destroy all recent snapshots and their dependents.
4402          */
4403         cb.cb_force = force;
4404         cb.cb_target = snap->zfs_name;
4405         cb.cb_create = zfs_prop_get_int(snap, ZFS_PROP_CREATETXG);
4406
4407         if (cb.cb_create > 0)
4408                 min_txg = cb.cb_create;
4409
4410         (void) zfs_iter_snapshots_v2(zhp, 0, rollback_destroy, &cb,
4411             min_txg, 0);
4412
4413         (void) zfs_iter_bookmarks_v2(zhp, 0, rollback_destroy, &cb);
4414
4415         if (cb.cb_error)
4416                 return (-1);
4417
4418         /*
4419          * Now that we have verified that the snapshot is the latest,
4420          * rollback to the given snapshot.
4421          */
4422
4423         if (zhp->zfs_type == ZFS_TYPE_VOLUME) {
4424                 if (zfs_which_resv_prop(zhp, &resv_prop) < 0)
4425                         return (-1);
4426                 old_volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE);
4427                 restore_resv =
4428                     (old_volsize == zfs_prop_get_int(zhp, resv_prop));
4429         }
4430
4431         /*
4432          * Pass both the filesystem and the wanted snapshot names,
4433          * we would get an error back if the snapshot is destroyed or
4434          * a new snapshot is created before this request is processed.
4435          */
4436         err = lzc_rollback_to(zhp->zfs_name, snap->zfs_name);
4437         if (err != 0) {
4438                 char errbuf[ERRBUFLEN];
4439
4440                 (void) snprintf(errbuf, sizeof (errbuf),
4441                     dgettext(TEXT_DOMAIN, "cannot rollback '%s'"),
4442                     zhp->zfs_name);
4443                 switch (err) {
4444                 case EEXIST:
4445                         zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN,
4446                             "there is a snapshot or bookmark more recent "
4447                             "than '%s'"), snap->zfs_name);
4448                         (void) zfs_error(zhp->zfs_hdl, EZFS_EXISTS, errbuf);
4449                         break;
4450                 case ESRCH:
4451                         zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN,
4452                             "'%s' is not found among snapshots of '%s'"),
4453                             snap->zfs_name, zhp->zfs_name);
4454                         (void) zfs_error(zhp->zfs_hdl, EZFS_NOENT, errbuf);
4455                         break;
4456                 case EINVAL:
4457                         (void) zfs_error(zhp->zfs_hdl, EZFS_BADTYPE, errbuf);
4458                         break;
4459                 default:
4460                         (void) zfs_standard_error(zhp->zfs_hdl, err, errbuf);
4461                 }
4462                 return (err);
4463         }
4464
4465         /*
4466          * For volumes, if the pre-rollback volsize matched the pre-
4467          * rollback reservation and the volsize has changed then set
4468          * the reservation property to the post-rollback volsize.
4469          * Make a new handle since the rollback closed the dataset.
4470          */
4471         if ((zhp->zfs_type == ZFS_TYPE_VOLUME) &&
4472             (zhp = make_dataset_handle(zhp->zfs_hdl, zhp->zfs_name))) {
4473                 if (restore_resv) {
4474                         new_volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE);
4475                         if (old_volsize != new_volsize)
4476                                 err = zfs_prop_set_int(zhp, resv_prop,
4477                                     new_volsize);
4478                 }
4479                 zfs_close(zhp);
4480         }
4481         return (err);
4482 }
4483
4484 /*
4485  * Renames the given dataset.
4486  */
4487 int
4488 zfs_rename(zfs_handle_t *zhp, const char *target, renameflags_t flags)
4489 {
4490         int ret = 0;
4491         zfs_cmd_t zc = {"\0"};
4492         char *delim;
4493         prop_changelist_t *cl = NULL;
4494         char parent[ZFS_MAX_DATASET_NAME_LEN];
4495         char property[ZFS_MAXPROPLEN];
4496         libzfs_handle_t *hdl = zhp->zfs_hdl;
4497         char errbuf[ERRBUFLEN];
4498
4499         /* if we have the same exact name, just return success */
4500         if (strcmp(zhp->zfs_name, target) == 0)
4501                 return (0);
4502
4503         (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
4504             "cannot rename to '%s'"), target);
4505
4506         /* make sure source name is valid */
4507         if (!zfs_validate_name(hdl, zhp->zfs_name, zhp->zfs_type, B_TRUE))
4508                 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
4509
4510         /*
4511          * Make sure the target name is valid
4512          */
4513         if (zhp->zfs_type == ZFS_TYPE_SNAPSHOT) {
4514                 if ((strchr(target, '@') == NULL) ||
4515                     *target == '@') {
4516                         /*
4517                          * Snapshot target name is abbreviated,
4518                          * reconstruct full dataset name
4519                          */
4520                         (void) strlcpy(parent, zhp->zfs_name,
4521                             sizeof (parent));
4522                         delim = strchr(parent, '@');
4523                         if (strchr(target, '@') == NULL)
4524                                 *(++delim) = '\0';
4525                         else
4526                                 *delim = '\0';
4527                         (void) strlcat(parent, target, sizeof (parent));
4528                         target = parent;
4529                 } else {
4530                         /*
4531                          * Make sure we're renaming within the same dataset.
4532                          */
4533                         delim = strchr(target, '@');
4534                         if (strncmp(zhp->zfs_name, target, delim - target)
4535                             != 0 || zhp->zfs_name[delim - target] != '@') {
4536                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4537                                     "snapshots must be part of same "
4538                                     "dataset"));
4539                                 return (zfs_error(hdl, EZFS_CROSSTARGET,
4540                                     errbuf));
4541                         }
4542                 }
4543
4544                 if (!zfs_validate_name(hdl, target, zhp->zfs_type, B_TRUE))
4545                         return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
4546         } else {
4547                 if (flags.recursive) {
4548                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4549                             "recursive rename must be a snapshot"));
4550                         return (zfs_error(hdl, EZFS_BADTYPE, errbuf));
4551                 }
4552
4553                 if (!zfs_validate_name(hdl, target, zhp->zfs_type, B_TRUE))
4554                         return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
4555
4556                 /* validate parents */
4557                 if (check_parents(hdl, target, NULL, B_FALSE, NULL) != 0)
4558                         return (-1);
4559
4560                 /* make sure we're in the same pool */
4561                 verify((delim = strchr(target, '/')) != NULL);
4562                 if (strncmp(zhp->zfs_name, target, delim - target) != 0 ||
4563                     zhp->zfs_name[delim - target] != '/') {
4564                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4565                             "datasets must be within same pool"));
4566                         return (zfs_error(hdl, EZFS_CROSSTARGET, errbuf));
4567                 }
4568
4569                 /* new name cannot be a child of the current dataset name */
4570                 if (is_descendant(zhp->zfs_name, target)) {
4571                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4572                             "New dataset name cannot be a descendant of "
4573                             "current dataset name"));
4574                         return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
4575                 }
4576         }
4577
4578         (void) snprintf(errbuf, sizeof (errbuf),
4579             dgettext(TEXT_DOMAIN, "cannot rename '%s'"), zhp->zfs_name);
4580
4581         if (getzoneid() == GLOBAL_ZONEID &&
4582             zfs_prop_get_int(zhp, ZFS_PROP_ZONED)) {
4583                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4584                     "dataset is used in a non-global zone"));
4585                 return (zfs_error(hdl, EZFS_ZONED, errbuf));
4586         }
4587
4588         /*
4589          * Avoid unmounting file systems with mountpoint property set to
4590          * 'legacy' or 'none' even if -u option is not given.
4591          */
4592         if (zhp->zfs_type == ZFS_TYPE_FILESYSTEM &&
4593             !flags.recursive && !flags.nounmount &&
4594             zfs_prop_get(zhp, ZFS_PROP_MOUNTPOINT, property,
4595             sizeof (property), NULL, NULL, 0, B_FALSE) == 0 &&
4596             (strcmp(property, "legacy") == 0 ||
4597             strcmp(property, "none") == 0)) {
4598                 flags.nounmount = B_TRUE;
4599         }
4600         if (flags.recursive) {
4601                 char *parentname = zfs_strdup(zhp->zfs_hdl, zhp->zfs_name);
4602                 delim = strchr(parentname, '@');
4603                 *delim = '\0';
4604                 zfs_handle_t *zhrp = zfs_open(zhp->zfs_hdl, parentname,
4605                     ZFS_TYPE_DATASET);
4606                 free(parentname);
4607                 if (zhrp == NULL) {
4608                         ret = -1;
4609                         goto error;
4610                 }
4611                 zfs_close(zhrp);
4612         } else if (zhp->zfs_type != ZFS_TYPE_SNAPSHOT) {
4613                 if ((cl = changelist_gather(zhp, ZFS_PROP_NAME,
4614                     flags.nounmount ? CL_GATHER_DONT_UNMOUNT :
4615                     CL_GATHER_ITER_MOUNTED,
4616                     flags.forceunmount ? MS_FORCE : 0)) == NULL)
4617                         return (-1);
4618
4619                 if (changelist_haszonedchild(cl)) {
4620                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4621                             "child dataset with inherited mountpoint is used "
4622                             "in a non-global zone"));
4623                         (void) zfs_error(hdl, EZFS_ZONED, errbuf);
4624                         ret = -1;
4625                         goto error;
4626                 }
4627
4628                 if ((ret = changelist_prefix(cl)) != 0)
4629                         goto error;
4630         }
4631
4632         if (ZFS_IS_VOLUME(zhp))
4633                 zc.zc_objset_type = DMU_OST_ZVOL;
4634         else
4635                 zc.zc_objset_type = DMU_OST_ZFS;
4636
4637         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
4638         (void) strlcpy(zc.zc_value, target, sizeof (zc.zc_value));
4639
4640         zc.zc_cookie = !!flags.recursive;
4641         zc.zc_cookie |= (!!flags.nounmount) << 1;
4642
4643         if ((ret = zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_RENAME, &zc)) != 0) {
4644                 /*
4645                  * if it was recursive, the one that actually failed will
4646                  * be in zc.zc_name
4647                  */
4648                 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
4649                     "cannot rename '%s'"), zc.zc_name);
4650
4651                 if (flags.recursive && errno == EEXIST) {
4652                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4653                             "a child dataset already has a snapshot "
4654                             "with the new name"));
4655                         (void) zfs_error(hdl, EZFS_EXISTS, errbuf);
4656                 } else if (errno == EACCES) {
4657                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4658                             "cannot move encrypted child outside of "
4659                             "its encryption root"));
4660                         (void) zfs_error(hdl, EZFS_CRYPTOFAILED, errbuf);
4661                 } else {
4662                         (void) zfs_standard_error(zhp->zfs_hdl, errno, errbuf);
4663                 }
4664
4665                 /*
4666                  * On failure, we still want to remount any filesystems that
4667                  * were previously mounted, so we don't alter the system state.
4668                  */
4669                 if (cl != NULL)
4670                         (void) changelist_postfix(cl);
4671         } else {
4672                 if (cl != NULL) {
4673                         changelist_rename(cl, zfs_get_name(zhp), target);
4674                         ret = changelist_postfix(cl);
4675                 }
4676         }
4677
4678 error:
4679         if (cl != NULL) {
4680                 changelist_free(cl);
4681         }
4682         return (ret);
4683 }
4684
4685 nvlist_t *
4686 zfs_get_all_props(zfs_handle_t *zhp)
4687 {
4688         return (zhp->zfs_props);
4689 }
4690
4691 nvlist_t *
4692 zfs_get_recvd_props(zfs_handle_t *zhp)
4693 {
4694         if (zhp->zfs_recvd_props == NULL)
4695                 if (get_recvd_props_ioctl(zhp) != 0)
4696                         return (NULL);
4697         return (zhp->zfs_recvd_props);
4698 }
4699
4700 nvlist_t *
4701 zfs_get_user_props(zfs_handle_t *zhp)
4702 {
4703         return (zhp->zfs_user_props);
4704 }
4705
4706 /*
4707  * This function is used by 'zfs list' to determine the exact set of columns to
4708  * display, and their maximum widths.  This does two main things:
4709  *
4710  *      - If this is a list of all properties, then expand the list to include
4711  *        all native properties, and set a flag so that for each dataset we look
4712  *        for new unique user properties and add them to the list.
4713  *
4714  *      - For non fixed-width properties, keep track of the maximum width seen
4715  *        so that we can size the column appropriately. If the user has
4716  *        requested received property values, we also need to compute the width
4717  *        of the RECEIVED column.
4718  */
4719 int
4720 zfs_expand_proplist(zfs_handle_t *zhp, zprop_list_t **plp, boolean_t received,
4721     boolean_t literal)
4722 {
4723         libzfs_handle_t *hdl = zhp->zfs_hdl;
4724         zprop_list_t *entry;
4725         zprop_list_t **last, **start;
4726         nvlist_t *userprops, *propval;
4727         nvpair_t *elem;
4728         const char *strval;
4729         char buf[ZFS_MAXPROPLEN];
4730
4731         if (zprop_expand_list(hdl, plp, ZFS_TYPE_DATASET) != 0)
4732                 return (-1);
4733
4734         userprops = zfs_get_user_props(zhp);
4735
4736         entry = *plp;
4737         if (entry->pl_all && nvlist_next_nvpair(userprops, NULL) != NULL) {
4738                 /*
4739                  * Go through and add any user properties as necessary.  We
4740                  * start by incrementing our list pointer to the first
4741                  * non-native property.
4742                  */
4743                 start = plp;
4744                 while (*start != NULL) {
4745                         if ((*start)->pl_prop == ZPROP_USERPROP)
4746                                 break;
4747                         start = &(*start)->pl_next;
4748                 }
4749
4750                 elem = NULL;
4751                 while ((elem = nvlist_next_nvpair(userprops, elem)) != NULL) {
4752                         /*
4753                          * See if we've already found this property in our list.
4754                          */
4755                         for (last = start; *last != NULL;
4756                             last = &(*last)->pl_next) {
4757                                 if (strcmp((*last)->pl_user_prop,
4758                                     nvpair_name(elem)) == 0)
4759                                         break;
4760                         }
4761
4762                         if (*last == NULL) {
4763                                 entry = zfs_alloc(hdl, sizeof (zprop_list_t));
4764                                 entry->pl_user_prop =
4765                                     zfs_strdup(hdl, nvpair_name(elem));
4766                                 entry->pl_prop = ZPROP_USERPROP;
4767                                 entry->pl_width = strlen(nvpair_name(elem));
4768                                 entry->pl_all = B_TRUE;
4769                                 *last = entry;
4770                         }
4771                 }
4772         }
4773
4774         /*
4775          * Now go through and check the width of any non-fixed columns
4776          */
4777         for (entry = *plp; entry != NULL; entry = entry->pl_next) {
4778                 if (entry->pl_fixed && !literal)
4779                         continue;
4780
4781                 if (entry->pl_prop != ZPROP_USERPROP) {
4782                         if (zfs_prop_get(zhp, entry->pl_prop,
4783                             buf, sizeof (buf), NULL, NULL, 0, literal) == 0) {
4784                                 if (strlen(buf) > entry->pl_width)
4785                                         entry->pl_width = strlen(buf);
4786                         }
4787                         if (received && zfs_prop_get_recvd(zhp,
4788                             zfs_prop_to_name(entry->pl_prop),
4789                             buf, sizeof (buf), literal) == 0)
4790                                 if (strlen(buf) > entry->pl_recvd_width)
4791                                         entry->pl_recvd_width = strlen(buf);
4792                 } else {
4793                         if (nvlist_lookup_nvlist(userprops, entry->pl_user_prop,
4794                             &propval) == 0) {
4795                                 strval = fnvlist_lookup_string(propval,
4796                                     ZPROP_VALUE);
4797                                 if (strlen(strval) > entry->pl_width)
4798                                         entry->pl_width = strlen(strval);
4799                         }
4800                         if (received && zfs_prop_get_recvd(zhp,
4801                             entry->pl_user_prop,
4802                             buf, sizeof (buf), literal) == 0)
4803                                 if (strlen(buf) > entry->pl_recvd_width)
4804                                         entry->pl_recvd_width = strlen(buf);
4805                 }
4806         }
4807
4808         return (0);
4809 }
4810
4811 void
4812 zfs_prune_proplist(zfs_handle_t *zhp, uint8_t *props)
4813 {
4814         nvpair_t *curr;
4815         nvpair_t *next;
4816
4817         /*
4818          * Keep a reference to the props-table against which we prune the
4819          * properties.
4820          */
4821         zhp->zfs_props_table = props;
4822
4823         curr = nvlist_next_nvpair(zhp->zfs_props, NULL);
4824
4825         while (curr) {
4826                 zfs_prop_t zfs_prop = zfs_name_to_prop(nvpair_name(curr));
4827                 next = nvlist_next_nvpair(zhp->zfs_props, curr);
4828
4829                 /*
4830                  * User properties will result in ZPROP_USERPROP (an alias
4831                  * for ZPROP_INVAL), and since we
4832                  * only know how to prune standard ZFS properties, we always
4833                  * leave these in the list.  This can also happen if we
4834                  * encounter an unknown DSL property (when running older
4835                  * software, for example).
4836                  */
4837                 if (zfs_prop != ZPROP_USERPROP && props[zfs_prop] == B_FALSE)
4838                         (void) nvlist_remove(zhp->zfs_props,
4839                             nvpair_name(curr), nvpair_type(curr));
4840                 curr = next;
4841         }
4842 }
4843
4844 static int
4845 zfs_smb_acl_mgmt(libzfs_handle_t *hdl, char *dataset, char *path,
4846     zfs_smb_acl_op_t cmd, char *resource1, char *resource2)
4847 {
4848         zfs_cmd_t zc = {"\0"};
4849         nvlist_t *nvlist = NULL;
4850         int error;
4851
4852         (void) strlcpy(zc.zc_name, dataset, sizeof (zc.zc_name));
4853         (void) strlcpy(zc.zc_value, path, sizeof (zc.zc_value));
4854         zc.zc_cookie = (uint64_t)cmd;
4855
4856         if (cmd == ZFS_SMB_ACL_RENAME) {
4857                 if (nvlist_alloc(&nvlist, NV_UNIQUE_NAME, 0) != 0) {
4858                         (void) no_memory(hdl);
4859                         return (0);
4860                 }
4861         }
4862
4863         switch (cmd) {
4864         case ZFS_SMB_ACL_ADD:
4865         case ZFS_SMB_ACL_REMOVE:
4866                 (void) strlcpy(zc.zc_string, resource1, sizeof (zc.zc_string));
4867                 break;
4868         case ZFS_SMB_ACL_RENAME:
4869                 if (nvlist_add_string(nvlist, ZFS_SMB_ACL_SRC,
4870                     resource1) != 0) {
4871                                 (void) no_memory(hdl);
4872                                 return (-1);
4873                 }
4874                 if (nvlist_add_string(nvlist, ZFS_SMB_ACL_TARGET,
4875                     resource2) != 0) {
4876                                 (void) no_memory(hdl);
4877                                 return (-1);
4878                 }
4879                 zcmd_write_src_nvlist(hdl, &zc, nvlist);
4880                 break;
4881         case ZFS_SMB_ACL_PURGE:
4882                 break;
4883         default:
4884                 return (-1);
4885         }
4886         error = ioctl(hdl->libzfs_fd, ZFS_IOC_SMB_ACL, &zc);
4887         nvlist_free(nvlist);
4888         return (error);
4889 }
4890
4891 int
4892 zfs_smb_acl_add(libzfs_handle_t *hdl, char *dataset,
4893     char *path, char *resource)
4894 {
4895         return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_ADD,
4896             resource, NULL));
4897 }
4898
4899 int
4900 zfs_smb_acl_remove(libzfs_handle_t *hdl, char *dataset,
4901     char *path, char *resource)
4902 {
4903         return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_REMOVE,
4904             resource, NULL));
4905 }
4906
4907 int
4908 zfs_smb_acl_purge(libzfs_handle_t *hdl, char *dataset, char *path)
4909 {
4910         return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_PURGE,
4911             NULL, NULL));
4912 }
4913
4914 int
4915 zfs_smb_acl_rename(libzfs_handle_t *hdl, char *dataset, char *path,
4916     char *oldname, char *newname)
4917 {
4918         return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_RENAME,
4919             oldname, newname));
4920 }
4921
4922 int
4923 zfs_userspace(zfs_handle_t *zhp, zfs_userquota_prop_t type,
4924     zfs_userspace_cb_t func, void *arg)
4925 {
4926         zfs_cmd_t zc = {"\0"};
4927         zfs_useracct_t buf[100];
4928         libzfs_handle_t *hdl = zhp->zfs_hdl;
4929         int ret;
4930
4931         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
4932
4933         zc.zc_objset_type = type;
4934         zc.zc_nvlist_dst = (uintptr_t)buf;
4935
4936         for (;;) {
4937                 zfs_useracct_t *zua = buf;
4938
4939                 zc.zc_nvlist_dst_size = sizeof (buf);
4940                 if (zfs_ioctl(hdl, ZFS_IOC_USERSPACE_MANY, &zc) != 0) {
4941                         if ((errno == ENOTSUP &&
4942                             (type == ZFS_PROP_USEROBJUSED ||
4943                             type == ZFS_PROP_GROUPOBJUSED ||
4944                             type == ZFS_PROP_USEROBJQUOTA ||
4945                             type == ZFS_PROP_GROUPOBJQUOTA ||
4946                             type == ZFS_PROP_PROJECTOBJUSED ||
4947                             type == ZFS_PROP_PROJECTOBJQUOTA ||
4948                             type == ZFS_PROP_PROJECTUSED ||
4949                             type == ZFS_PROP_PROJECTQUOTA)))
4950                                 break;
4951
4952                         return (zfs_standard_error_fmt(hdl, errno,
4953                             dgettext(TEXT_DOMAIN,
4954                             "cannot get used/quota for %s"), zc.zc_name));
4955                 }
4956                 if (zc.zc_nvlist_dst_size == 0)
4957                         break;
4958
4959                 while (zc.zc_nvlist_dst_size > 0) {
4960                         if ((ret = func(arg, zua->zu_domain, zua->zu_rid,
4961                             zua->zu_space)) != 0)
4962                                 return (ret);
4963                         zua++;
4964                         zc.zc_nvlist_dst_size -= sizeof (zfs_useracct_t);
4965                 }
4966         }
4967
4968         return (0);
4969 }
4970
4971 struct holdarg {
4972         nvlist_t *nvl;
4973         const char *snapname;
4974         const char *tag;
4975         boolean_t recursive;
4976         int error;
4977 };
4978
4979 static int
4980 zfs_hold_one(zfs_handle_t *zhp, void *arg)
4981 {
4982         struct holdarg *ha = arg;
4983         char name[ZFS_MAX_DATASET_NAME_LEN];
4984         int rv = 0;
4985
4986         if (snprintf(name, sizeof (name), "%s@%s", zhp->zfs_name,
4987             ha->snapname) >= sizeof (name))
4988                 return (EINVAL);
4989
4990         if (lzc_exists(name))
4991                 fnvlist_add_string(ha->nvl, name, ha->tag);
4992
4993         if (ha->recursive)
4994                 rv = zfs_iter_filesystems_v2(zhp, 0, zfs_hold_one, ha);
4995         zfs_close(zhp);
4996         return (rv);
4997 }
4998
4999 int
5000 zfs_hold(zfs_handle_t *zhp, const char *snapname, const char *tag,
5001     boolean_t recursive, int cleanup_fd)
5002 {
5003         int ret;
5004         struct holdarg ha;
5005
5006         ha.nvl = fnvlist_alloc();
5007         ha.snapname = snapname;
5008         ha.tag = tag;
5009         ha.recursive = recursive;
5010         (void) zfs_hold_one(zfs_handle_dup(zhp), &ha);
5011
5012         if (nvlist_empty(ha.nvl)) {
5013                 char errbuf[ERRBUFLEN];
5014
5015                 fnvlist_free(ha.nvl);
5016                 ret = ENOENT;
5017                 (void) snprintf(errbuf, sizeof (errbuf),
5018                     dgettext(TEXT_DOMAIN,
5019                     "cannot hold snapshot '%s@%s'"),
5020                     zhp->zfs_name, snapname);
5021                 (void) zfs_standard_error(zhp->zfs_hdl, ret, errbuf);
5022                 return (ret);
5023         }
5024
5025         ret = zfs_hold_nvl(zhp, cleanup_fd, ha.nvl);
5026         fnvlist_free(ha.nvl);
5027
5028         return (ret);
5029 }
5030
5031 int
5032 zfs_hold_nvl(zfs_handle_t *zhp, int cleanup_fd, nvlist_t *holds)
5033 {
5034         int ret;
5035         nvlist_t *errors;
5036         libzfs_handle_t *hdl = zhp->zfs_hdl;
5037         char errbuf[ERRBUFLEN];
5038         nvpair_t *elem;
5039
5040         errors = NULL;
5041         ret = lzc_hold(holds, cleanup_fd, &errors);
5042
5043         if (ret == 0) {
5044                 /* There may be errors even in the success case. */
5045                 fnvlist_free(errors);
5046                 return (0);
5047         }
5048
5049         if (nvlist_empty(errors)) {
5050                 /* no hold-specific errors */
5051                 (void) snprintf(errbuf, sizeof (errbuf),
5052                     dgettext(TEXT_DOMAIN, "cannot hold"));
5053                 switch (ret) {
5054                 case ENOTSUP:
5055                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
5056                             "pool must be upgraded"));
5057                         (void) zfs_error(hdl, EZFS_BADVERSION, errbuf);
5058                         break;
5059                 case EINVAL:
5060                         (void) zfs_error(hdl, EZFS_BADTYPE, errbuf);
5061                         break;
5062                 default:
5063                         (void) zfs_standard_error(hdl, ret, errbuf);
5064                 }
5065         }
5066
5067         for (elem = nvlist_next_nvpair(errors, NULL);
5068             elem != NULL;
5069             elem = nvlist_next_nvpair(errors, elem)) {
5070                 (void) snprintf(errbuf, sizeof (errbuf),
5071                     dgettext(TEXT_DOMAIN,
5072                     "cannot hold snapshot '%s'"), nvpair_name(elem));
5073                 switch (fnvpair_value_int32(elem)) {
5074                 case E2BIG:
5075                         /*
5076                          * Temporary tags wind up having the ds object id
5077                          * prepended. So even if we passed the length check
5078                          * above, it's still possible for the tag to wind
5079                          * up being slightly too long.
5080                          */
5081                         (void) zfs_error(hdl, EZFS_TAGTOOLONG, errbuf);
5082                         break;
5083                 case EINVAL:
5084                         (void) zfs_error(hdl, EZFS_BADTYPE, errbuf);
5085                         break;
5086                 case EEXIST:
5087                         (void) zfs_error(hdl, EZFS_REFTAG_HOLD, errbuf);
5088                         break;
5089                 default:
5090                         (void) zfs_standard_error(hdl,
5091                             fnvpair_value_int32(elem), errbuf);
5092                 }
5093         }
5094
5095         fnvlist_free(errors);
5096         return (ret);
5097 }
5098
5099 static int
5100 zfs_release_one(zfs_handle_t *zhp, void *arg)
5101 {
5102         struct holdarg *ha = arg;
5103         char name[ZFS_MAX_DATASET_NAME_LEN];
5104         int rv = 0;
5105         nvlist_t *existing_holds;
5106
5107         if (snprintf(name, sizeof (name), "%s@%s", zhp->zfs_name,
5108             ha->snapname) >= sizeof (name)) {
5109                 ha->error = EINVAL;
5110                 rv = EINVAL;
5111         }
5112
5113         if (lzc_get_holds(name, &existing_holds) != 0) {
5114                 ha->error = ENOENT;
5115         } else if (!nvlist_exists(existing_holds, ha->tag)) {
5116                 ha->error = ESRCH;
5117         } else {
5118                 nvlist_t *torelease = fnvlist_alloc();
5119                 fnvlist_add_boolean(torelease, ha->tag);
5120                 fnvlist_add_nvlist(ha->nvl, name, torelease);
5121                 fnvlist_free(torelease);
5122         }
5123
5124         if (ha->recursive)
5125                 rv = zfs_iter_filesystems_v2(zhp, 0, zfs_release_one, ha);
5126         zfs_close(zhp);
5127         return (rv);
5128 }
5129
5130 int
5131 zfs_release(zfs_handle_t *zhp, const char *snapname, const char *tag,
5132     boolean_t recursive)
5133 {
5134         int ret;
5135         struct holdarg ha;
5136         nvlist_t *errors = NULL;
5137         nvpair_t *elem;
5138         libzfs_handle_t *hdl = zhp->zfs_hdl;
5139         char errbuf[ERRBUFLEN];
5140
5141         ha.nvl = fnvlist_alloc();
5142         ha.snapname = snapname;
5143         ha.tag = tag;
5144         ha.recursive = recursive;
5145         ha.error = 0;
5146         (void) zfs_release_one(zfs_handle_dup(zhp), &ha);
5147
5148         if (nvlist_empty(ha.nvl)) {
5149                 fnvlist_free(ha.nvl);
5150                 ret = ha.error;
5151                 (void) snprintf(errbuf, sizeof (errbuf),
5152                     dgettext(TEXT_DOMAIN,
5153                     "cannot release hold from snapshot '%s@%s'"),
5154                     zhp->zfs_name, snapname);
5155                 if (ret == ESRCH) {
5156                         (void) zfs_error(hdl, EZFS_REFTAG_RELE, errbuf);
5157                 } else {
5158                         (void) zfs_standard_error(hdl, ret, errbuf);
5159                 }
5160                 return (ret);
5161         }
5162
5163         ret = lzc_release(ha.nvl, &errors);
5164         fnvlist_free(ha.nvl);
5165
5166         if (ret == 0) {
5167                 /* There may be errors even in the success case. */
5168                 fnvlist_free(errors);
5169                 return (0);
5170         }
5171
5172         if (nvlist_empty(errors)) {
5173                 /* no hold-specific errors */
5174                 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
5175                     "cannot release"));
5176                 switch (errno) {
5177                 case ENOTSUP:
5178                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
5179                             "pool must be upgraded"));
5180                         (void) zfs_error(hdl, EZFS_BADVERSION, errbuf);
5181                         break;
5182                 default:
5183                         (void) zfs_standard_error(hdl, errno, errbuf);
5184                 }
5185         }
5186
5187         for (elem = nvlist_next_nvpair(errors, NULL);
5188             elem != NULL;
5189             elem = nvlist_next_nvpair(errors, elem)) {
5190                 (void) snprintf(errbuf, sizeof (errbuf),
5191                     dgettext(TEXT_DOMAIN,
5192                     "cannot release hold from snapshot '%s'"),
5193                     nvpair_name(elem));
5194                 switch (fnvpair_value_int32(elem)) {
5195                 case ESRCH:
5196                         (void) zfs_error(hdl, EZFS_REFTAG_RELE, errbuf);
5197                         break;
5198                 case EINVAL:
5199                         (void) zfs_error(hdl, EZFS_BADTYPE, errbuf);
5200                         break;
5201                 default:
5202                         (void) zfs_standard_error(hdl,
5203                             fnvpair_value_int32(elem), errbuf);
5204                 }
5205         }
5206
5207         fnvlist_free(errors);
5208         return (ret);
5209 }
5210
5211 int
5212 zfs_get_fsacl(zfs_handle_t *zhp, nvlist_t **nvl)
5213 {
5214         zfs_cmd_t zc = {"\0"};
5215         libzfs_handle_t *hdl = zhp->zfs_hdl;
5216         int nvsz = 2048;
5217         void *nvbuf;
5218         int err = 0;
5219         char errbuf[ERRBUFLEN];
5220
5221         assert(zhp->zfs_type == ZFS_TYPE_VOLUME ||
5222             zhp->zfs_type == ZFS_TYPE_FILESYSTEM);
5223
5224 tryagain:
5225
5226         nvbuf = malloc(nvsz);
5227         if (nvbuf == NULL) {
5228                 err = (zfs_error(hdl, EZFS_NOMEM, zfs_strerror(errno)));
5229                 goto out;
5230         }
5231
5232         zc.zc_nvlist_dst_size = nvsz;
5233         zc.zc_nvlist_dst = (uintptr_t)nvbuf;
5234
5235         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
5236
5237         if (zfs_ioctl(hdl, ZFS_IOC_GET_FSACL, &zc) != 0) {
5238                 (void) snprintf(errbuf, sizeof (errbuf),
5239                     dgettext(TEXT_DOMAIN, "cannot get permissions on '%s'"),
5240                     zc.zc_name);
5241                 switch (errno) {
5242                 case ENOMEM:
5243                         free(nvbuf);
5244                         nvsz = zc.zc_nvlist_dst_size;
5245                         goto tryagain;
5246
5247                 case ENOTSUP:
5248                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
5249                             "pool must be upgraded"));
5250                         err = zfs_error(hdl, EZFS_BADVERSION, errbuf);
5251                         break;
5252                 case EINVAL:
5253                         err = zfs_error(hdl, EZFS_BADTYPE, errbuf);
5254                         break;
5255                 case ENOENT:
5256                         err = zfs_error(hdl, EZFS_NOENT, errbuf);
5257                         break;
5258                 default:
5259                         err = zfs_standard_error(hdl, errno, errbuf);
5260                         break;
5261                 }
5262         } else {
5263                 /* success */
5264                 int rc = nvlist_unpack(nvbuf, zc.zc_nvlist_dst_size, nvl, 0);
5265                 if (rc) {
5266                         err = zfs_standard_error_fmt(hdl, rc, dgettext(
5267                             TEXT_DOMAIN, "cannot get permissions on '%s'"),
5268                             zc.zc_name);
5269                 }
5270         }
5271
5272         free(nvbuf);
5273 out:
5274         return (err);
5275 }
5276
5277 int
5278 zfs_set_fsacl(zfs_handle_t *zhp, boolean_t un, nvlist_t *nvl)
5279 {
5280         zfs_cmd_t zc = {"\0"};
5281         libzfs_handle_t *hdl = zhp->zfs_hdl;
5282         char *nvbuf;
5283         char errbuf[ERRBUFLEN];
5284         size_t nvsz;
5285         int err;
5286
5287         assert(zhp->zfs_type == ZFS_TYPE_VOLUME ||
5288             zhp->zfs_type == ZFS_TYPE_FILESYSTEM);
5289
5290         err = nvlist_size(nvl, &nvsz, NV_ENCODE_NATIVE);
5291         assert(err == 0);
5292
5293         nvbuf = malloc(nvsz);
5294
5295         err = nvlist_pack(nvl, &nvbuf, &nvsz, NV_ENCODE_NATIVE, 0);
5296         assert(err == 0);
5297
5298         zc.zc_nvlist_src_size = nvsz;
5299         zc.zc_nvlist_src = (uintptr_t)nvbuf;
5300         zc.zc_perm_action = un;
5301
5302         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
5303
5304         if (zfs_ioctl(hdl, ZFS_IOC_SET_FSACL, &zc) != 0) {
5305                 (void) snprintf(errbuf, sizeof (errbuf),
5306                     dgettext(TEXT_DOMAIN, "cannot set permissions on '%s'"),
5307                     zc.zc_name);
5308                 switch (errno) {
5309                 case ENOTSUP:
5310                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
5311                             "pool must be upgraded"));
5312                         err = zfs_error(hdl, EZFS_BADVERSION, errbuf);
5313                         break;
5314                 case EINVAL:
5315                         err = zfs_error(hdl, EZFS_BADTYPE, errbuf);
5316                         break;
5317                 case ENOENT:
5318                         err = zfs_error(hdl, EZFS_NOENT, errbuf);
5319                         break;
5320                 default:
5321                         err = zfs_standard_error(hdl, errno, errbuf);
5322                         break;
5323                 }
5324         }
5325
5326         free(nvbuf);
5327
5328         return (err);
5329 }
5330
5331 int
5332 zfs_get_holds(zfs_handle_t *zhp, nvlist_t **nvl)
5333 {
5334         int err;
5335         char errbuf[ERRBUFLEN];
5336
5337         err = lzc_get_holds(zhp->zfs_name, nvl);
5338
5339         if (err != 0) {
5340                 libzfs_handle_t *hdl = zhp->zfs_hdl;
5341
5342                 (void) snprintf(errbuf, sizeof (errbuf),
5343                     dgettext(TEXT_DOMAIN, "cannot get holds for '%s'"),
5344                     zhp->zfs_name);
5345                 switch (err) {
5346                 case ENOTSUP:
5347                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
5348                             "pool must be upgraded"));
5349                         err = zfs_error(hdl, EZFS_BADVERSION, errbuf);
5350                         break;
5351                 case EINVAL:
5352                         err = zfs_error(hdl, EZFS_BADTYPE, errbuf);
5353                         break;
5354                 case ENOENT:
5355                         err = zfs_error(hdl, EZFS_NOENT, errbuf);
5356                         break;
5357                 default:
5358                         err = zfs_standard_error(hdl, errno, errbuf);
5359                         break;
5360                 }
5361         }
5362
5363         return (err);
5364 }
5365
5366 /*
5367  * The theory of raidz space accounting
5368  *
5369  * The "referenced" property of RAIDZ vdevs is scaled such that a 128KB block
5370  * will "reference" 128KB, even though it allocates more than that, to store the
5371  * parity information (and perhaps skip sectors). This concept of the
5372  * "referenced" (and other DMU space accounting) being lower than the allocated
5373  * space by a constant factor is called "raidz deflation."
5374  *
5375  * As mentioned above, the constant factor for raidz deflation assumes a 128KB
5376  * block size. However, zvols typically have a much smaller block size (default
5377  * 8KB). These smaller blocks may require proportionally much more parity
5378  * information (and perhaps skip sectors). In this case, the change to the
5379  * "referenced" property may be much more than the logical block size.
5380  *
5381  * Suppose a raidz vdev has 5 disks with ashift=12.  A 128k block may be written
5382  * as follows.
5383  *
5384  * +-------+-------+-------+-------+-------+
5385  * | disk1 | disk2 | disk3 | disk4 | disk5 |
5386  * +-------+-------+-------+-------+-------+
5387  * |  P0   |  D0   |  D8   |  D16  |  D24  |
5388  * |  P1   |  D1   |  D9   |  D17  |  D25  |
5389  * |  P2   |  D2   |  D10  |  D18  |  D26  |
5390  * |  P3   |  D3   |  D11  |  D19  |  D27  |
5391  * |  P4   |  D4   |  D12  |  D20  |  D28  |
5392  * |  P5   |  D5   |  D13  |  D21  |  D29  |
5393  * |  P6   |  D6   |  D14  |  D22  |  D30  |
5394  * |  P7   |  D7   |  D15  |  D23  |  D31  |
5395  * +-------+-------+-------+-------+-------+
5396  *
5397  * Above, notice that 160k was allocated: 8 x 4k parity sectors + 32 x 4k data
5398  * sectors.  The dataset's referenced will increase by 128k and the pool's
5399  * allocated and free properties will be adjusted by 160k.
5400  *
5401  * A 4k block written to the same raidz vdev will require two 4k sectors.  The
5402  * blank cells represent unallocated space.
5403  *
5404  * +-------+-------+-------+-------+-------+
5405  * | disk1 | disk2 | disk3 | disk4 | disk5 |
5406  * +-------+-------+-------+-------+-------+
5407  * |  P0   |  D0   |       |       |       |
5408  * +-------+-------+-------+-------+-------+
5409  *
5410  * Above, notice that the 4k block required one sector for parity and another
5411  * for data.  vdev_raidz_asize() will return 8k and as such the pool's allocated
5412  * and free properties will be adjusted by 8k.  The dataset will not be charged
5413  * 8k.  Rather, it will be charged a value that is scaled according to the
5414  * overhead of the 128k block on the same vdev.  This 8k allocation will be
5415  * charged 8k * 128k / 160k.  128k is from SPA_OLD_MAXBLOCKSIZE and 160k is as
5416  * calculated in the 128k block example above.
5417  *
5418  * Every raidz allocation is sized to be a multiple of nparity+1 sectors.  That
5419  * is, every raidz1 allocation will be a multiple of 2 sectors, raidz2
5420  * allocations are a multiple of 3 sectors, and raidz3 allocations are a
5421  * multiple of of 4 sectors.  When a block does not fill the required number of
5422  * sectors, skip blocks (sectors) are used.
5423  *
5424  * An 8k block being written to a raidz vdev may be written as follows:
5425  *
5426  * +-------+-------+-------+-------+-------+
5427  * | disk1 | disk2 | disk3 | disk4 | disk5 |
5428  * +-------+-------+-------+-------+-------+
5429  * |  P0   |  D0   |  D1   |  S0   |       |
5430  * +-------+-------+-------+-------+-------+
5431  *
5432  * In order to maintain the nparity+1 allocation size, a skip block (S0) was
5433  * added.  For this 8k block, the pool's allocated and free properties are
5434  * adjusted by 16k and the dataset's referenced is increased by 16k * 128k /
5435  * 160k.  Again, 128k is from SPA_OLD_MAXBLOCKSIZE and 160k is as calculated in
5436  * the 128k block example above.
5437  *
5438  * The situation is slightly different for dRAID since the minimum allocation
5439  * size is the full group width.  The same 8K block above would be written as
5440  * follows in a dRAID group:
5441  *
5442  * +-------+-------+-------+-------+-------+
5443  * | disk1 | disk2 | disk3 | disk4 | disk5 |
5444  * +-------+-------+-------+-------+-------+
5445  * |  P0   |  D0   |  D1   |  S0   |  S1   |
5446  * +-------+-------+-------+-------+-------+
5447  *
5448  * Compression may lead to a variety of block sizes being written for the same
5449  * volume or file.  There is no clear way to reserve just the amount of space
5450  * that will be required, so the worst case (no compression) is assumed.
5451  * Note that metadata blocks will typically be compressed, so the reservation
5452  * size returned by zvol_volsize_to_reservation() will generally be slightly
5453  * larger than the maximum that the volume can reference.
5454  */
5455
5456 /*
5457  * Derived from function of same name in module/zfs/vdev_raidz.c.  Returns the
5458  * amount of space (in bytes) that will be allocated for the specified block
5459  * size. Note that the "referenced" space accounted will be less than this, but
5460  * not necessarily equal to "blksize", due to RAIDZ deflation.
5461  */
5462 static uint64_t
5463 vdev_raidz_asize(uint64_t ndisks, uint64_t nparity, uint64_t ashift,
5464     uint64_t blksize)
5465 {
5466         uint64_t asize, ndata;
5467
5468         ASSERT3U(ndisks, >, nparity);
5469         ndata = ndisks - nparity;
5470         asize = ((blksize - 1) >> ashift) + 1;
5471         asize += nparity * ((asize + ndata - 1) / ndata);
5472         asize = roundup(asize, nparity + 1) << ashift;
5473
5474         return (asize);
5475 }
5476
5477 /*
5478  * Derived from function of same name in module/zfs/vdev_draid.c.  Returns the
5479  * amount of space (in bytes) that will be allocated for the specified block
5480  * size.
5481  */
5482 static uint64_t
5483 vdev_draid_asize(uint64_t ndisks, uint64_t nparity, uint64_t ashift,
5484     uint64_t blksize)
5485 {
5486         ASSERT3U(ndisks, >, nparity);
5487         uint64_t ndata = ndisks - nparity;
5488         uint64_t rows = ((blksize - 1) / (ndata << ashift)) + 1;
5489         uint64_t asize = (rows * ndisks) << ashift;
5490
5491         return (asize);
5492 }
5493
5494 /*
5495  * Determine how much space will be allocated if it lands on the most space-
5496  * inefficient top-level vdev.  Returns the size in bytes required to store one
5497  * copy of the volume data.  See theory comment above.
5498  */
5499 static uint64_t
5500 volsize_from_vdevs(zpool_handle_t *zhp, uint64_t nblocks, uint64_t blksize)
5501 {
5502         nvlist_t *config, *tree, **vdevs;
5503         uint_t nvdevs;
5504         uint64_t ret = 0;
5505
5506         config = zpool_get_config(zhp, NULL);
5507         if (nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, &tree) != 0 ||
5508             nvlist_lookup_nvlist_array(tree, ZPOOL_CONFIG_CHILDREN,
5509             &vdevs, &nvdevs) != 0) {
5510                 return (nblocks * blksize);
5511         }
5512
5513         for (int v = 0; v < nvdevs; v++) {
5514                 const char *type;
5515                 uint64_t nparity, ashift, asize, tsize;
5516                 uint64_t volsize;
5517
5518                 if (nvlist_lookup_string(vdevs[v], ZPOOL_CONFIG_TYPE,
5519                     &type) != 0)
5520                         continue;
5521
5522                 if (strcmp(type, VDEV_TYPE_RAIDZ) != 0 &&
5523                     strcmp(type, VDEV_TYPE_DRAID) != 0)
5524                         continue;
5525
5526                 if (nvlist_lookup_uint64(vdevs[v],
5527                     ZPOOL_CONFIG_NPARITY, &nparity) != 0)
5528                         continue;
5529
5530                 if (nvlist_lookup_uint64(vdevs[v],
5531                     ZPOOL_CONFIG_ASHIFT, &ashift) != 0)
5532                         continue;
5533
5534                 if (strcmp(type, VDEV_TYPE_RAIDZ) == 0) {
5535                         nvlist_t **disks;
5536                         uint_t ndisks;
5537
5538                         if (nvlist_lookup_nvlist_array(vdevs[v],
5539                             ZPOOL_CONFIG_CHILDREN, &disks, &ndisks) != 0)
5540                                 continue;
5541
5542                         /* allocation size for the "typical" 128k block */
5543                         tsize = vdev_raidz_asize(ndisks, nparity, ashift,
5544                             SPA_OLD_MAXBLOCKSIZE);
5545
5546                         /* allocation size for the blksize block */
5547                         asize = vdev_raidz_asize(ndisks, nparity, ashift,
5548                             blksize);
5549                 } else {
5550                         uint64_t ndata;
5551
5552                         if (nvlist_lookup_uint64(vdevs[v],
5553                             ZPOOL_CONFIG_DRAID_NDATA, &ndata) != 0)
5554                                 continue;
5555
5556                         /* allocation size for the "typical" 128k block */
5557                         tsize = vdev_draid_asize(ndata + nparity, nparity,
5558                             ashift, SPA_OLD_MAXBLOCKSIZE);
5559
5560                         /* allocation size for the blksize block */
5561                         asize = vdev_draid_asize(ndata + nparity, nparity,
5562                             ashift, blksize);
5563                 }
5564
5565                 /*
5566                  * Scale this size down as a ratio of 128k / tsize.
5567                  * See theory statement above.
5568                  */
5569                 volsize = nblocks * asize * SPA_OLD_MAXBLOCKSIZE / tsize;
5570                 if (volsize > ret) {
5571                         ret = volsize;
5572                 }
5573         }
5574
5575         if (ret == 0) {
5576                 ret = nblocks * blksize;
5577         }
5578
5579         return (ret);
5580 }
5581
5582 /*
5583  * Convert the zvol's volume size to an appropriate reservation.  See theory
5584  * comment above.
5585  *
5586  * Note: If this routine is updated, it is necessary to update the ZFS test
5587  * suite's shell version in reservation.shlib.
5588  */
5589 uint64_t
5590 zvol_volsize_to_reservation(zpool_handle_t *zph, uint64_t volsize,
5591     nvlist_t *props)
5592 {
5593         uint64_t numdb;
5594         uint64_t nblocks, volblocksize;
5595         int ncopies;
5596         const char *strval;
5597
5598         if (nvlist_lookup_string(props,
5599             zfs_prop_to_name(ZFS_PROP_COPIES), &strval) == 0)
5600                 ncopies = atoi(strval);
5601         else
5602                 ncopies = 1;
5603         if (nvlist_lookup_uint64(props,
5604             zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE),
5605             &volblocksize) != 0)
5606                 volblocksize = ZVOL_DEFAULT_BLOCKSIZE;
5607
5608         nblocks = volsize / volblocksize;
5609         /*
5610          * Metadata defaults to using 128k blocks, not volblocksize blocks.  For
5611          * this reason, only the data blocks are scaled based on vdev config.
5612          */
5613         volsize = volsize_from_vdevs(zph, nblocks, volblocksize);
5614
5615         /* start with metadnode L0-L6 */
5616         numdb = 7;
5617         /* calculate number of indirects */
5618         while (nblocks > 1) {
5619                 nblocks += DNODES_PER_LEVEL - 1;
5620                 nblocks /= DNODES_PER_LEVEL;
5621                 numdb += nblocks;
5622         }
5623         numdb *= MIN(SPA_DVAS_PER_BP, ncopies + 1);
5624         volsize *= ncopies;
5625         /*
5626          * this is exactly DN_MAX_INDBLKSHIFT when metadata isn't
5627          * compressed, but in practice they compress down to about
5628          * 1100 bytes
5629          */
5630         numdb *= 1ULL << DN_MAX_INDBLKSHIFT;
5631         volsize += numdb;
5632         return (volsize);
5633 }
5634
5635 /*
5636  * Wait for the given activity and return the status of the wait (whether or not
5637  * any waiting was done) in the 'waited' parameter. Non-existent fses are
5638  * reported via the 'missing' parameter, rather than by printing an error
5639  * message. This is convenient when this function is called in a loop over a
5640  * long period of time (as it is, for example, by zfs's wait cmd). In that
5641  * scenario, a fs being exported or destroyed should be considered a normal
5642  * event, so we don't want to print an error when we find that the fs doesn't
5643  * exist.
5644  */
5645 int
5646 zfs_wait_status(zfs_handle_t *zhp, zfs_wait_activity_t activity,
5647     boolean_t *missing, boolean_t *waited)
5648 {
5649         int error = lzc_wait_fs(zhp->zfs_name, activity, waited);
5650         *missing = (error == ENOENT);
5651         if (*missing)
5652                 return (0);
5653
5654         if (error != 0) {
5655                 (void) zfs_standard_error_fmt(zhp->zfs_hdl, error,
5656                     dgettext(TEXT_DOMAIN, "error waiting in fs '%s'"),
5657                     zhp->zfs_name);
5658         }
5659
5660         return (error);
5661 }