cddl/contrib/opensolaris/lib/libzfs/common/libzfs_dataset.c

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21
  22 /*
  23  * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
  24  * Copyright 2012 Nexenta Systems, Inc. All rights reserved.
  25  * Copyright (c) 2011 by Delphix. All rights reserved.
  26  * Copyright (c) 2012 DEY Storage Systems, Inc.  All rights reserved.
  27  * Copyright (c) 2011-2012 Pawel Jakub Dawidek <pawel@dawidek.net>.
  28  * All rights reserved.
  29  * Copyright (c) 2012 Martin Matuska <mm@FreeBSD.org>. All rights reserved.
  30  */
  31
  32 #include <ctype.h>
  33 #include <errno.h>
  34 #include <libintl.h>
  35 #include <math.h>
  36 #include <stdio.h>
  37 #include <stdlib.h>
  38 #include <strings.h>
  39 #include <unistd.h>
  40 #include <stddef.h>
  41 #include <zone.h>
  42 #include <fcntl.h>
  43 #include <sys/mntent.h>
  44 #include <sys/mount.h>
  45 #include <priv.h>
  46 #include <pwd.h>
  47 #include <grp.h>
  48 #include <stddef.h>
  49 #include <idmap.h>
  50
  51 #include <sys/dnode.h>
  52 #include <sys/spa.h>
  53 #include <sys/zap.h>
  54 #include <sys/misc.h>
  55 #include <libzfs.h>
  56
  57 #include "zfs_namecheck.h"
  58 #include "zfs_prop.h"
  59 #include "libzfs_impl.h"
  60 #include "zfs_deleg.h"
  61
  62 static int userquota_propname_decode(const char *propname, boolean_t zoned,
  63     zfs_userquota_prop_t *typep, char *domain, int domainlen, uint64_t *ridp);
  64
  65 /*
  66  * Given a single type (not a mask of types), return the type in a human
  67  * readable form.
  68  */
  69 const char *
  70 zfs_type_to_name(zfs_type_t type)
  71 {
  72         switch (type) {
  73         case ZFS_TYPE_FILESYSTEM:
  74                 return (dgettext(TEXT_DOMAIN, "filesystem"));
  75         case ZFS_TYPE_SNAPSHOT:
  76                 return (dgettext(TEXT_DOMAIN, "snapshot"));
  77         case ZFS_TYPE_VOLUME:
  78                 return (dgettext(TEXT_DOMAIN, "volume"));
  79         }
  80
  81         return (NULL);
  82 }
  83
  84 /*
  85  * Given a path and mask of ZFS types, return a string describing this dataset.
  86  * This is used when we fail to open a dataset and we cannot get an exact type.
  87  * We guess what the type would have been based on the path and the mask of
  88  * acceptable types.
  89  */
  90 static const char *
  91 path_to_str(const char *path, int types)
  92 {
  93         /*
  94          * When given a single type, always report the exact type.
  95          */
  96         if (types == ZFS_TYPE_SNAPSHOT)
  97                 return (dgettext(TEXT_DOMAIN, "snapshot"));
  98         if (types == ZFS_TYPE_FILESYSTEM)
  99                 return (dgettext(TEXT_DOMAIN, "filesystem"));
 100         if (types == ZFS_TYPE_VOLUME)
 101                 return (dgettext(TEXT_DOMAIN, "volume"));
 102
 103         /*
 104          * The user is requesting more than one type of dataset.  If this is the
 105          * case, consult the path itself.  If we're looking for a snapshot, and
 106          * a '@' is found, then report it as "snapshot".  Otherwise, remove the
 107          * snapshot attribute and try again.
 108          */
 109         if (types & ZFS_TYPE_SNAPSHOT) {
 110                 if (strchr(path, '@') != NULL)
 111                         return (dgettext(TEXT_DOMAIN, "snapshot"));
 112                 return (path_to_str(path, types & ~ZFS_TYPE_SNAPSHOT));
 113         }
 114
 115         /*
 116          * The user has requested either filesystems or volumes.
 117          * We have no way of knowing a priori what type this would be, so always
 118          * report it as "filesystem" or "volume", our two primitive types.
 119          */
 120         if (types & ZFS_TYPE_FILESYSTEM)
 121                 return (dgettext(TEXT_DOMAIN, "filesystem"));
 122
 123         assert(types & ZFS_TYPE_VOLUME);
 124         return (dgettext(TEXT_DOMAIN, "volume"));
 125 }
 126
 127 /*
 128  * Validate a ZFS path.  This is used even before trying to open the dataset, to
 129  * provide a more meaningful error message.  We call zfs_error_aux() to
 130  * explain exactly why the name was not valid.
 131  */
 132 int
 133 zfs_validate_name(libzfs_handle_t *hdl, const char *path, int type,
 134     boolean_t modifying)
 135 {
 136         namecheck_err_t why;
 137         char what;
 138
 139         (void) zfs_prop_get_table();
 140         if (dataset_namecheck(path, &why, &what) != 0) {
 141                 if (hdl != NULL) {
 142                         switch (why) {
 143                         case NAME_ERR_TOOLONG:
 144                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 145                                     "name is too long"));
 146                                 break;
 147
 148                         case NAME_ERR_LEADING_SLASH:
 149                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 150                                     "leading slash in name"));
 151                                 break;
 152
 153                         case NAME_ERR_EMPTY_COMPONENT:
 154                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 155                                     "empty component in name"));
 156                                 break;
 157
 158                         case NAME_ERR_TRAILING_SLASH:
 159                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 160                                     "trailing slash in name"));
 161                                 break;
 162
 163                         case NAME_ERR_INVALCHAR:
 164                                 zfs_error_aux(hdl,
 165                                     dgettext(TEXT_DOMAIN, "invalid character "
 166                                     "'%c' in name"), what);
 167                                 break;
 168
 169                         case NAME_ERR_MULTIPLE_AT:
 170                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 171                                     "multiple '@' delimiters in name"));
 172                                 break;
 173
 174                         case NAME_ERR_NOLETTER:
 175                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 176                                     "pool doesn't begin with a letter"));
 177                                 break;
 178
 179                         case NAME_ERR_RESERVED:
 180                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 181                                     "name is reserved"));
 182                                 break;
 183
 184                         case NAME_ERR_DISKLIKE:
 185                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 186                                     "reserved disk name"));
 187                                 break;
 188                         }
 189                 }
 190
 191                 return (0);
 192         }
 193
 194         if (!(type & ZFS_TYPE_SNAPSHOT) && strchr(path, '@') != NULL) {
 195                 if (hdl != NULL)
 196                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 197                             "snapshot delimiter '@' in filesystem name"));
 198                 return (0);
 199         }
 200
 201         if (type == ZFS_TYPE_SNAPSHOT && strchr(path, '@') == NULL) {
 202                 if (hdl != NULL)
 203                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 204                             "missing '@' delimiter in snapshot name"));
 205                 return (0);
 206         }
 207
 208         if (modifying && strchr(path, '%') != NULL) {
 209                 if (hdl != NULL)
 210                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 211                             "invalid character %c in name"), '%');
 212                 return (0);
 213         }
 214
 215         return (-1);
 216 }
 217
 218 int
 219 zfs_name_valid(const char *name, zfs_type_t type)
 220 {
 221         if (type == ZFS_TYPE_POOL)
 222                 return (zpool_name_valid(NULL, B_FALSE, name));
 223         return (zfs_validate_name(NULL, name, type, B_FALSE));
 224 }
 225
 226 /*
 227  * This function takes the raw DSL properties, and filters out the user-defined
 228  * properties into a separate nvlist.
 229  */
 230 static nvlist_t *
 231 process_user_props(zfs_handle_t *zhp, nvlist_t *props)
 232 {
 233         libzfs_handle_t *hdl = zhp->zfs_hdl;
 234         nvpair_t *elem;
 235         nvlist_t *propval;
 236         nvlist_t *nvl;
 237
 238         if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0) != 0) {
 239                 (void) no_memory(hdl);
 240                 return (NULL);
 241         }
 242
 243         elem = NULL;
 244         while ((elem = nvlist_next_nvpair(props, elem)) != NULL) {
 245                 if (!zfs_prop_user(nvpair_name(elem)))
 246                         continue;
 247
 248                 verify(nvpair_value_nvlist(elem, &propval) == 0);
 249                 if (nvlist_add_nvlist(nvl, nvpair_name(elem), propval) != 0) {
 250                         nvlist_free(nvl);
 251                         (void) no_memory(hdl);
 252                         return (NULL);
 253                 }
 254         }
 255
 256         return (nvl);
 257 }
 258
 259 static zpool_handle_t *
 260 zpool_add_handle(zfs_handle_t *zhp, const char *pool_name)
 261 {
 262         libzfs_handle_t *hdl = zhp->zfs_hdl;
 263         zpool_handle_t *zph;
 264
 265         if ((zph = zpool_open_canfail(hdl, pool_name)) != NULL) {
 266                 if (hdl->libzfs_pool_handles != NULL)
 267                         zph->zpool_next = hdl->libzfs_pool_handles;
 268                 hdl->libzfs_pool_handles = zph;
 269         }
 270         return (zph);
 271 }
 272
 273 static zpool_handle_t *
 274 zpool_find_handle(zfs_handle_t *zhp, const char *pool_name, int len)
 275 {
 276         libzfs_handle_t *hdl = zhp->zfs_hdl;
 277         zpool_handle_t *zph = hdl->libzfs_pool_handles;
 278
 279         while ((zph != NULL) &&
 280             (strncmp(pool_name, zpool_get_name(zph), len) != 0))
 281                 zph = zph->zpool_next;
 282         return (zph);
 283 }
 284
 285 /*
 286  * Returns a handle to the pool that contains the provided dataset.
 287  * If a handle to that pool already exists then that handle is returned.
 288  * Otherwise, a new handle is created and added to the list of handles.
 289  */
 290 static zpool_handle_t *
 291 zpool_handle(zfs_handle_t *zhp)
 292 {
 293         char *pool_name;
 294         int len;
 295         zpool_handle_t *zph;
 296
 297         len = strcspn(zhp->zfs_name, "/@") + 1;
 298         pool_name = zfs_alloc(zhp->zfs_hdl, len);
 299         (void) strlcpy(pool_name, zhp->zfs_name, len);
 300
 301         zph = zpool_find_handle(zhp, pool_name, len);
 302         if (zph == NULL)
 303                 zph = zpool_add_handle(zhp, pool_name);
 304
 305         free(pool_name);
 306         return (zph);
 307 }
 308
 309 void
 310 zpool_free_handles(libzfs_handle_t *hdl)
 311 {
 312         zpool_handle_t *next, *zph = hdl->libzfs_pool_handles;
 313
 314         while (zph != NULL) {
 315                 next = zph->zpool_next;
 316                 zpool_close(zph);
 317                 zph = next;
 318         }
 319         hdl->libzfs_pool_handles = NULL;
 320 }
 321
 322 /*
 323  * Utility function to gather stats (objset and zpl) for the given object.
 324  */
 325 static int
 326 get_stats_ioctl(zfs_handle_t *zhp, zfs_cmd_t *zc)
 327 {
 328         libzfs_handle_t *hdl = zhp->zfs_hdl;
 329
 330         (void) strlcpy(zc->zc_name, zhp->zfs_name, sizeof (zc->zc_name));
 331
 332         while (ioctl(hdl->libzfs_fd, ZFS_IOC_OBJSET_STATS, zc) != 0) {
 333                 if (errno == ENOMEM) {
 334                         if (zcmd_expand_dst_nvlist(hdl, zc) != 0) {
 335                                 return (-1);
 336                         }
 337                 } else {
 338                         return (-1);
 339                 }
 340         }
 341         return (0);
 342 }
 343
 344 /*
 345  * Utility function to get the received properties of the given object.
 346  */
 347 static int
 348 get_recvd_props_ioctl(zfs_handle_t *zhp)
 349 {
 350         libzfs_handle_t *hdl = zhp->zfs_hdl;
 351         nvlist_t *recvdprops;
 352         zfs_cmd_t zc = { 0 };
 353         int err;
 354
 355         if (zcmd_alloc_dst_nvlist(hdl, &zc, 0) != 0)
 356                 return (-1);
 357
 358         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
 359
 360         while (ioctl(hdl->libzfs_fd, ZFS_IOC_OBJSET_RECVD_PROPS, &zc) != 0) {
 361                 if (errno == ENOMEM) {
 362                         if (zcmd_expand_dst_nvlist(hdl, &zc) != 0) {
 363                                 return (-1);
 364                         }
 365                 } else {
 366                         zcmd_free_nvlists(&zc);
 367                         return (-1);
 368                 }
 369         }
 370
 371         err = zcmd_read_dst_nvlist(zhp->zfs_hdl, &zc, &recvdprops);
 372         zcmd_free_nvlists(&zc);
 373         if (err != 0)
 374                 return (-1);
 375
 376         nvlist_free(zhp->zfs_recvd_props);
 377         zhp->zfs_recvd_props = recvdprops;
 378
 379         return (0);
 380 }
 381
 382 static int
 383 put_stats_zhdl(zfs_handle_t *zhp, zfs_cmd_t *zc)
 384 {
 385         nvlist_t *allprops, *userprops;
 386
 387         zhp->zfs_dmustats = zc->zc_objset_stats; /* structure assignment */
 388
 389         if (zcmd_read_dst_nvlist(zhp->zfs_hdl, zc, &allprops) != 0) {
 390                 return (-1);
 391         }
 392
 393         /*
 394          * XXX Why do we store the user props separately, in addition to
 395          * storing them in zfs_props?
 396          */
 397         if ((userprops = process_user_props(zhp, allprops)) == NULL) {
 398                 nvlist_free(allprops);
 399                 return (-1);
 400         }
 401
 402         nvlist_free(zhp->zfs_props);
 403         nvlist_free(zhp->zfs_user_props);
 404
 405         zhp->zfs_props = allprops;
 406         zhp->zfs_user_props = userprops;
 407
 408         return (0);
 409 }
 410
 411 static int
 412 get_stats(zfs_handle_t *zhp)
 413 {
 414         int rc = 0;
 415         zfs_cmd_t zc = { 0 };
 416
 417         if (zcmd_alloc_dst_nvlist(zhp->zfs_hdl, &zc, 0) != 0)
 418                 return (-1);
 419         if (get_stats_ioctl(zhp, &zc) != 0)
 420                 rc = -1;
 421         else if (put_stats_zhdl(zhp, &zc) != 0)
 422                 rc = -1;
 423         zcmd_free_nvlists(&zc);
 424         return (rc);
 425 }
 426
 427 /*
 428  * Refresh the properties currently stored in the handle.
 429  */
 430 void
 431 zfs_refresh_properties(zfs_handle_t *zhp)
 432 {
 433         (void) get_stats(zhp);
 434 }
 435
 436 /*
 437  * Makes a handle from the given dataset name.  Used by zfs_open() and
 438  * zfs_iter_* to create child handles on the fly.
 439  */
 440 static int
 441 make_dataset_handle_common(zfs_handle_t *zhp, zfs_cmd_t *zc)
 442 {
 443         if (put_stats_zhdl(zhp, zc) != 0)
 444                 return (-1);
 445
 446         /*
 447          * We've managed to open the dataset and gather statistics.  Determine
 448          * the high-level type.
 449          */
 450         if (zhp->zfs_dmustats.dds_type == DMU_OST_ZVOL)
 451                 zhp->zfs_head_type = ZFS_TYPE_VOLUME;
 452         else if (zhp->zfs_dmustats.dds_type == DMU_OST_ZFS)
 453                 zhp->zfs_head_type = ZFS_TYPE_FILESYSTEM;
 454         else
 455                 abort();
 456
 457         if (zhp->zfs_dmustats.dds_is_snapshot)
 458                 zhp->zfs_type = ZFS_TYPE_SNAPSHOT;
 459         else if (zhp->zfs_dmustats.dds_type == DMU_OST_ZVOL)
 460                 zhp->zfs_type = ZFS_TYPE_VOLUME;
 461         else if (zhp->zfs_dmustats.dds_type == DMU_OST_ZFS)
 462                 zhp->zfs_type = ZFS_TYPE_FILESYSTEM;
 463         else
 464                 abort();        /* we should never see any other types */
 465
 466         if ((zhp->zpool_hdl = zpool_handle(zhp)) == NULL)
 467                 return (-1);
 468
 469         return (0);
 470 }
 471
 472 zfs_handle_t *
 473 make_dataset_handle(libzfs_handle_t *hdl, const char *path)
 474 {
 475         zfs_cmd_t zc = { 0 };
 476
 477         zfs_handle_t *zhp = calloc(sizeof (zfs_handle_t), 1);
 478
 479         if (zhp == NULL)
 480                 return (NULL);
 481
 482         zhp->zfs_hdl = hdl;
 483         (void) strlcpy(zhp->zfs_name, path, sizeof (zhp->zfs_name));
 484         if (zcmd_alloc_dst_nvlist(hdl, &zc, 0) != 0) {
 485                 free(zhp);
 486                 return (NULL);
 487         }
 488         if (get_stats_ioctl(zhp, &zc) == -1) {
 489                 zcmd_free_nvlists(&zc);
 490                 free(zhp);
 491                 return (NULL);
 492         }
 493         if (make_dataset_handle_common(zhp, &zc) == -1) {
 494                 free(zhp);
 495                 zhp = NULL;
 496         }
 497         zcmd_free_nvlists(&zc);
 498         return (zhp);
 499 }
 500
 501 zfs_handle_t *
 502 make_dataset_handle_zc(libzfs_handle_t *hdl, zfs_cmd_t *zc)
 503 {
 504         zfs_handle_t *zhp = calloc(sizeof (zfs_handle_t), 1);
 505
 506         if (zhp == NULL)
 507                 return (NULL);
 508
 509         zhp->zfs_hdl = hdl;
 510         (void) strlcpy(zhp->zfs_name, zc->zc_name, sizeof (zhp->zfs_name));
 511         if (make_dataset_handle_common(zhp, zc) == -1) {
 512                 free(zhp);
 513                 return (NULL);
 514         }
 515         return (zhp);
 516 }
 517
 518 zfs_handle_t *
 519 make_dataset_simple_handle_zc(zfs_handle_t *pzhp, zfs_cmd_t *zc)
 520 {
 521         zfs_handle_t *zhp = calloc(sizeof (zfs_handle_t), 1);
 522
 523         if (zhp == NULL)
 524                 return (NULL);
 525
 526         zhp->zfs_hdl = pzhp->zfs_hdl;
 527         (void) strlcpy(zhp->zfs_name, zc->zc_name, sizeof (zhp->zfs_name));
 528         zhp->zfs_head_type = pzhp->zfs_type;
 529         zhp->zfs_type = ZFS_TYPE_SNAPSHOT;
 530         zhp->zpool_hdl = zpool_handle(zhp);
 531         return (zhp);
 532 }
 533
 534 zfs_handle_t *
 535 zfs_handle_dup(zfs_handle_t *zhp_orig)
 536 {
 537         zfs_handle_t *zhp = calloc(sizeof (zfs_handle_t), 1);
 538
 539         if (zhp == NULL)
 540                 return (NULL);
 541
 542         zhp->zfs_hdl = zhp_orig->zfs_hdl;
 543         zhp->zpool_hdl = zhp_orig->zpool_hdl;
 544         (void) strlcpy(zhp->zfs_name, zhp_orig->zfs_name,
 545             sizeof (zhp->zfs_name));
 546         zhp->zfs_type = zhp_orig->zfs_type;
 547         zhp->zfs_head_type = zhp_orig->zfs_head_type;
 548         zhp->zfs_dmustats = zhp_orig->zfs_dmustats;
 549         if (zhp_orig->zfs_props != NULL) {
 550                 if (nvlist_dup(zhp_orig->zfs_props, &zhp->zfs_props, 0) != 0) {
 551                         (void) no_memory(zhp->zfs_hdl);
 552                         zfs_close(zhp);
 553                         return (NULL);
 554                 }
 555         }
 556         if (zhp_orig->zfs_user_props != NULL) {
 557                 if (nvlist_dup(zhp_orig->zfs_user_props,
 558                     &zhp->zfs_user_props, 0) != 0) {
 559                         (void) no_memory(zhp->zfs_hdl);
 560                         zfs_close(zhp);
 561                         return (NULL);
 562                 }
 563         }
 564         if (zhp_orig->zfs_recvd_props != NULL) {
 565                 if (nvlist_dup(zhp_orig->zfs_recvd_props,
 566                     &zhp->zfs_recvd_props, 0)) {
 567                         (void) no_memory(zhp->zfs_hdl);
 568                         zfs_close(zhp);
 569                         return (NULL);
 570                 }
 571         }
 572         zhp->zfs_mntcheck = zhp_orig->zfs_mntcheck;
 573         if (zhp_orig->zfs_mntopts != NULL) {
 574                 zhp->zfs_mntopts = zfs_strdup(zhp_orig->zfs_hdl,
 575                     zhp_orig->zfs_mntopts);
 576         }
 577         zhp->zfs_props_table = zhp_orig->zfs_props_table;
 578         return (zhp);
 579 }
 580
 581 /*
 582  * Opens the given snapshot, filesystem, or volume.   The 'types'
 583  * argument is a mask of acceptable types.  The function will print an
 584  * appropriate error message and return NULL if it can't be opened.
 585  */
 586 zfs_handle_t *
 587 zfs_open(libzfs_handle_t *hdl, const char *path, int types)
 588 {
 589         zfs_handle_t *zhp;
 590         char errbuf[1024];
 591
 592         (void) snprintf(errbuf, sizeof (errbuf),
 593             dgettext(TEXT_DOMAIN, "cannot open '%s'"), path);
 594
 595         /*
 596          * Validate the name before we even try to open it.
 597          */
 598         if (!zfs_validate_name(hdl, path, ZFS_TYPE_DATASET, B_FALSE)) {
 599                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 600                     "invalid dataset name"));
 601                 (void) zfs_error(hdl, EZFS_INVALIDNAME, errbuf);
 602                 return (NULL);
 603         }
 604
 605         /*
 606          * Try to get stats for the dataset, which will tell us if it exists.
 607          */
 608         errno = 0;
 609         if ((zhp = make_dataset_handle(hdl, path)) == NULL) {
 610                 (void) zfs_standard_error(hdl, errno, errbuf);
 611                 return (NULL);
 612         }
 613
 614         if (zhp == NULL) {
 615                 char *at = strchr(path, '@');
 616
 617                 if (at != NULL)
 618                         *at = '\0';
 619                 errno = 0;
 620                 if ((zhp = make_dataset_handle(hdl, path)) == NULL) {
 621                         (void) zfs_standard_error(hdl, errno, errbuf);
 622                         return (NULL);
 623                 }
 624                 if (at != NULL)
 625                         *at = '@';
 626                 (void) strlcpy(zhp->zfs_name, path, sizeof (zhp->zfs_name));
 627                 zhp->zfs_type = ZFS_TYPE_SNAPSHOT;
 628         }
 629
 630         if (!(types & zhp->zfs_type)) {
 631                 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf);
 632                 zfs_close(zhp);
 633                 return (NULL);
 634         }
 635
 636         return (zhp);
 637 }
 638
 639 /*
 640  * Release a ZFS handle.  Nothing to do but free the associated memory.
 641  */
 642 void
 643 zfs_close(zfs_handle_t *zhp)
 644 {
 645         if (zhp->zfs_mntopts)
 646                 free(zhp->zfs_mntopts);
 647         nvlist_free(zhp->zfs_props);
 648         nvlist_free(zhp->zfs_user_props);
 649         nvlist_free(zhp->zfs_recvd_props);
 650         free(zhp);
 651 }
 652
 653 typedef struct mnttab_node {
 654         struct mnttab mtn_mt;
 655         avl_node_t mtn_node;
 656 } mnttab_node_t;
 657
 658 static int
 659 libzfs_mnttab_cache_compare(const void *arg1, const void *arg2)
 660 {
 661         const mnttab_node_t *mtn1 = arg1;
 662         const mnttab_node_t *mtn2 = arg2;
 663         int rv;
 664
 665         rv = strcmp(mtn1->mtn_mt.mnt_special, mtn2->mtn_mt.mnt_special);
 666
 667         if (rv == 0)
 668                 return (0);
 669         return (rv > 0 ? 1 : -1);
 670 }
 671
 672 void
 673 libzfs_mnttab_init(libzfs_handle_t *hdl)
 674 {
 675         assert(avl_numnodes(&hdl->libzfs_mnttab_cache) == 0);
 676         avl_create(&hdl->libzfs_mnttab_cache, libzfs_mnttab_cache_compare,
 677             sizeof (mnttab_node_t), offsetof(mnttab_node_t, mtn_node));
 678 }
 679
 680 void
 681 libzfs_mnttab_update(libzfs_handle_t *hdl)
 682 {
 683         struct mnttab entry;
 684
 685         rewind(hdl->libzfs_mnttab);
 686         while (getmntent(hdl->libzfs_mnttab, &entry) == 0) {
 687                 mnttab_node_t *mtn;
 688
 689                 if (strcmp(entry.mnt_fstype, MNTTYPE_ZFS) != 0)
 690                         continue;
 691                 mtn = zfs_alloc(hdl, sizeof (mnttab_node_t));
 692                 mtn->mtn_mt.mnt_special = zfs_strdup(hdl, entry.mnt_special);
 693                 mtn->mtn_mt.mnt_mountp = zfs_strdup(hdl, entry.mnt_mountp);
 694                 mtn->mtn_mt.mnt_fstype = zfs_strdup(hdl, entry.mnt_fstype);
 695                 mtn->mtn_mt.mnt_mntopts = zfs_strdup(hdl, entry.mnt_mntopts);
 696                 avl_add(&hdl->libzfs_mnttab_cache, mtn);
 697         }
 698 }
 699
 700 void
 701 libzfs_mnttab_fini(libzfs_handle_t *hdl)
 702 {
 703         void *cookie = NULL;
 704         mnttab_node_t *mtn;
 705
 706         while (mtn = avl_destroy_nodes(&hdl->libzfs_mnttab_cache, &cookie)) {
 707                 free(mtn->mtn_mt.mnt_special);
 708                 free(mtn->mtn_mt.mnt_mountp);
 709                 free(mtn->mtn_mt.mnt_fstype);
 710                 free(mtn->mtn_mt.mnt_mntopts);
 711                 free(mtn);
 712         }
 713         avl_destroy(&hdl->libzfs_mnttab_cache);
 714 }
 715
 716 void
 717 libzfs_mnttab_cache(libzfs_handle_t *hdl, boolean_t enable)
 718 {
 719         hdl->libzfs_mnttab_enable = enable;
 720 }
 721
 722 int
 723 libzfs_mnttab_find(libzfs_handle_t *hdl, const char *fsname,
 724     struct mnttab *entry)
 725 {
 726         mnttab_node_t find;
 727         mnttab_node_t *mtn;
 728
 729         if (!hdl->libzfs_mnttab_enable) {
 730                 struct mnttab srch = { 0 };
 731
 732                 if (avl_numnodes(&hdl->libzfs_mnttab_cache))
 733                         libzfs_mnttab_fini(hdl);
 734                 rewind(hdl->libzfs_mnttab);
 735                 srch.mnt_special = (char *)fsname;
 736                 srch.mnt_fstype = MNTTYPE_ZFS;
 737                 if (getmntany(hdl->libzfs_mnttab, entry, &srch) == 0)
 738                         return (0);
 739                 else
 740                         return (ENOENT);
 741         }
 742
 743         if (avl_numnodes(&hdl->libzfs_mnttab_cache) == 0)
 744                 libzfs_mnttab_update(hdl);
 745
 746         find.mtn_mt.mnt_special = (char *)fsname;
 747         mtn = avl_find(&hdl->libzfs_mnttab_cache, &find, NULL);
 748         if (mtn) {
 749                 *entry = mtn->mtn_mt;
 750                 return (0);
 751         }
 752         return (ENOENT);
 753 }
 754
 755 void
 756 libzfs_mnttab_add(libzfs_handle_t *hdl, const char *special,
 757     const char *mountp, const char *mntopts)
 758 {
 759         mnttab_node_t *mtn;
 760
 761         if (avl_numnodes(&hdl->libzfs_mnttab_cache) == 0)
 762                 return;
 763         mtn = zfs_alloc(hdl, sizeof (mnttab_node_t));
 764         mtn->mtn_mt.mnt_special = zfs_strdup(hdl, special);
 765         mtn->mtn_mt.mnt_mountp = zfs_strdup(hdl, mountp);
 766         mtn->mtn_mt.mnt_fstype = zfs_strdup(hdl, MNTTYPE_ZFS);
 767         mtn->mtn_mt.mnt_mntopts = zfs_strdup(hdl, mntopts);
 768         avl_add(&hdl->libzfs_mnttab_cache, mtn);
 769 }
 770
 771 void
 772 libzfs_mnttab_remove(libzfs_handle_t *hdl, const char *fsname)
 773 {
 774         mnttab_node_t find;
 775         mnttab_node_t *ret;
 776
 777         find.mtn_mt.mnt_special = (char *)fsname;
 778         if (ret = avl_find(&hdl->libzfs_mnttab_cache, (void *)&find, NULL)) {
 779                 avl_remove(&hdl->libzfs_mnttab_cache, ret);
 780                 free(ret->mtn_mt.mnt_special);
 781                 free(ret->mtn_mt.mnt_mountp);
 782                 free(ret->mtn_mt.mnt_fstype);
 783                 free(ret->mtn_mt.mnt_mntopts);
 784                 free(ret);
 785         }
 786 }
 787
 788 int
 789 zfs_spa_version(zfs_handle_t *zhp, int *spa_version)
 790 {
 791         zpool_handle_t *zpool_handle = zhp->zpool_hdl;
 792
 793         if (zpool_handle == NULL)
 794                 return (-1);
 795
 796         *spa_version = zpool_get_prop_int(zpool_handle,
 797             ZPOOL_PROP_VERSION, NULL);
 798         return (0);
 799 }
 800
 801 /*
 802  * The choice of reservation property depends on the SPA version.
 803  */
 804 static int
 805 zfs_which_resv_prop(zfs_handle_t *zhp, zfs_prop_t *resv_prop)
 806 {
 807         int spa_version;
 808
 809         if (zfs_spa_version(zhp, &spa_version) < 0)
 810                 return (-1);
 811
 812         if (spa_version >= SPA_VERSION_REFRESERVATION)
 813                 *resv_prop = ZFS_PROP_REFRESERVATION;
 814         else
 815                 *resv_prop = ZFS_PROP_RESERVATION;
 816
 817         return (0);
 818 }
 819
 820 /*
 821  * Given an nvlist of properties to set, validates that they are correct, and
 822  * parses any numeric properties (index, boolean, etc) if they are specified as
 823  * strings.
 824  */
 825 nvlist_t *
 826 zfs_valid_proplist(libzfs_handle_t *hdl, zfs_type_t type, nvlist_t *nvl,
 827     uint64_t zoned, zfs_handle_t *zhp, const char *errbuf)
 828 {
 829         nvpair_t *elem;
 830         uint64_t intval;
 831         char *strval;
 832         zfs_prop_t prop;
 833         nvlist_t *ret;
 834         int chosen_normal = -1;
 835         int chosen_utf = -1;
 836
 837         if (nvlist_alloc(&ret, NV_UNIQUE_NAME, 0) != 0) {
 838                 (void) no_memory(hdl);
 839                 return (NULL);
 840         }
 841
 842         /*
 843          * Make sure this property is valid and applies to this type.
 844          */
 845
 846         elem = NULL;
 847         while ((elem = nvlist_next_nvpair(nvl, elem)) != NULL) {
 848                 const char *propname = nvpair_name(elem);
 849
 850                 prop = zfs_name_to_prop(propname);
 851                 if (prop == ZPROP_INVAL && zfs_prop_user(propname)) {
 852                         /*
 853                          * This is a user property: make sure it's a
 854                          * string, and that it's less than ZAP_MAXNAMELEN.
 855                          */
 856                         if (nvpair_type(elem) != DATA_TYPE_STRING) {
 857                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 858                                     "'%s' must be a string"), propname);
 859                                 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
 860                                 goto error;
 861                         }
 862
 863                         if (strlen(nvpair_name(elem)) >= ZAP_MAXNAMELEN) {
 864                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 865                                     "property name '%s' is too long"),
 866                                     propname);
 867                                 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
 868                                 goto error;
 869                         }
 870
 871                         (void) nvpair_value_string(elem, &strval);
 872                         if (nvlist_add_string(ret, propname, strval) != 0) {
 873                                 (void) no_memory(hdl);
 874                                 goto error;
 875                         }
 876                         continue;
 877                 }
 878
 879                 /*
 880                  * Currently, only user properties can be modified on
 881                  * snapshots.
 882                  */
 883                 if (type == ZFS_TYPE_SNAPSHOT) {
 884                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 885                             "this property can not be modified for snapshots"));
 886                         (void) zfs_error(hdl, EZFS_PROPTYPE, errbuf);
 887                         goto error;
 888                 }
 889
 890                 if (prop == ZPROP_INVAL && zfs_prop_userquota(propname)) {
 891                         zfs_userquota_prop_t uqtype;
 892                         char newpropname[128];
 893                         char domain[128];
 894                         uint64_t rid;
 895                         uint64_t valary[3];
 896
 897                         if (userquota_propname_decode(propname, zoned,
 898                             &uqtype, domain, sizeof (domain), &rid) != 0) {
 899                                 zfs_error_aux(hdl,
 900                                     dgettext(TEXT_DOMAIN,
 901                                     "'%s' has an invalid user/group name"),
 902                                     propname);
 903                                 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
 904                                 goto error;
 905                         }
 906
 907                         if (uqtype != ZFS_PROP_USERQUOTA &&
 908                             uqtype != ZFS_PROP_GROUPQUOTA) {
 909                                 zfs_error_aux(hdl,
 910                                     dgettext(TEXT_DOMAIN, "'%s' is readonly"),
 911                                     propname);
 912                                 (void) zfs_error(hdl, EZFS_PROPREADONLY,
 913                                     errbuf);
 914                                 goto error;
 915                         }
 916
 917                         if (nvpair_type(elem) == DATA_TYPE_STRING) {
 918                                 (void) nvpair_value_string(elem, &strval);
 919                                 if (strcmp(strval, "none") == 0) {
 920                                         intval = 0;
 921                                 } else if (zfs_nicestrtonum(hdl,
 922                                     strval, &intval) != 0) {
 923                                         (void) zfs_error(hdl,
 924                                             EZFS_BADPROP, errbuf);
 925                                         goto error;
 926                                 }
 927                         } else if (nvpair_type(elem) ==
 928                             DATA_TYPE_UINT64) {
 929                                 (void) nvpair_value_uint64(elem, &intval);
 930                                 if (intval == 0) {
 931                                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 932                                             "use 'none' to disable "
 933                                             "userquota/groupquota"));
 934                                         goto error;
 935                                 }
 936                         } else {
 937                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 938                                     "'%s' must be a number"), propname);
 939                                 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
 940                                 goto error;
 941                         }
 942
 943                         /*
 944                          * Encode the prop name as
 945                          * userquota@<hex-rid>-domain, to make it easy
 946                          * for the kernel to decode.
 947                          */
 948                         (void) snprintf(newpropname, sizeof (newpropname),
 949                             "%s%llx-%s", zfs_userquota_prop_prefixes[uqtype],
 950                             (longlong_t)rid, domain);
 951                         valary[0] = uqtype;
 952                         valary[1] = rid;
 953                         valary[2] = intval;
 954                         if (nvlist_add_uint64_array(ret, newpropname,
 955                             valary, 3) != 0) {
 956                                 (void) no_memory(hdl);
 957                                 goto error;
 958                         }
 959                         continue;
 960                 } else if (prop == ZPROP_INVAL && zfs_prop_written(propname)) {
 961                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 962                             "'%s' is readonly"),
 963                             propname);
 964                         (void) zfs_error(hdl, EZFS_PROPREADONLY, errbuf);
 965                         goto error;
 966                 }
 967
 968                 if (prop == ZPROP_INVAL) {
 969                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 970                             "invalid property '%s'"), propname);
 971                         (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
 972                         goto error;
 973                 }
 974
 975                 if (!zfs_prop_valid_for_type(prop, type)) {
 976                         zfs_error_aux(hdl,
 977                             dgettext(TEXT_DOMAIN, "'%s' does not "
 978                             "apply to datasets of this type"), propname);
 979                         (void) zfs_error(hdl, EZFS_PROPTYPE, errbuf);
 980                         goto error;
 981                 }
 982
 983                 if (zfs_prop_readonly(prop) &&
 984                     (!zfs_prop_setonce(prop) || zhp != NULL)) {
 985                         zfs_error_aux(hdl,
 986                             dgettext(TEXT_DOMAIN, "'%s' is readonly"),
 987                             propname);
 988                         (void) zfs_error(hdl, EZFS_PROPREADONLY, errbuf);
 989                         goto error;
 990                 }
 991
 992                 if (zprop_parse_value(hdl, elem, prop, type, ret,
 993                     &strval, &intval, errbuf) != 0)
 994                         goto error;
 995
 996                 /*
 997                  * Perform some additional checks for specific properties.
 998                  */
 999                 switch (prop) {
1000                 case ZFS_PROP_VERSION:
1001                 {
1002                         int version;
1003
1004                         if (zhp == NULL)
1005                                 break;
1006                         version = zfs_prop_get_int(zhp, ZFS_PROP_VERSION);
1007                         if (intval < version) {
1008                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1009                                     "Can not downgrade; already at version %u"),
1010                                     version);
1011                                 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1012                                 goto error;
1013                         }
1014                         break;
1015                 }
1016
1017                 case ZFS_PROP_RECORDSIZE:
1018                 case ZFS_PROP_VOLBLOCKSIZE:
1019                         /* must be power of two within SPA_{MIN,MAX}BLOCKSIZE */
1020                         if (intval < SPA_MINBLOCKSIZE ||
1021                             intval > SPA_MAXBLOCKSIZE || !ISP2(intval)) {
1022                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1023                                     "'%s' must be power of 2 from %u "
1024                                     "to %uk"), propname,
1025                                     (uint_t)SPA_MINBLOCKSIZE,
1026                                     (uint_t)SPA_MAXBLOCKSIZE >> 10);
1027                                 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1028                                 goto error;
1029                         }
1030                         break;
1031
1032                 case ZFS_PROP_MLSLABEL:
1033                 {
1034 #ifdef sun
1035                         /*
1036                          * Verify the mlslabel string and convert to
1037                          * internal hex label string.
1038                          */
1039
1040                         m_label_t *new_sl;
1041                         char *hex = NULL;       /* internal label string */
1042
1043                         /* Default value is already OK. */
1044                         if (strcasecmp(strval, ZFS_MLSLABEL_DEFAULT) == 0)
1045                                 break;
1046
1047                         /* Verify the label can be converted to binary form */
1048                         if (((new_sl = m_label_alloc(MAC_LABEL)) == NULL) ||
1049                             (str_to_label(strval, &new_sl, MAC_LABEL,
1050                             L_NO_CORRECTION, NULL) == -1)) {
1051                                 goto badlabel;
1052                         }
1053
1054                         /* Now translate to hex internal label string */
1055                         if (label_to_str(new_sl, &hex, M_INTERNAL,
1056                             DEF_NAMES) != 0) {
1057                                 if (hex)
1058                                         free(hex);
1059                                 goto badlabel;
1060                         }
1061                         m_label_free(new_sl);
1062
1063                         /* If string is already in internal form, we're done. */
1064                         if (strcmp(strval, hex) == 0) {
1065                                 free(hex);
1066                                 break;
1067                         }
1068
1069                         /* Replace the label string with the internal form. */
1070                         (void) nvlist_remove(ret, zfs_prop_to_name(prop),
1071                             DATA_TYPE_STRING);
1072                         verify(nvlist_add_string(ret, zfs_prop_to_name(prop),
1073                             hex) == 0);
1074                         free(hex);
1075
1076                         break;
1077
1078 badlabel:
1079                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1080                             "invalid mlslabel '%s'"), strval);
1081                         (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1082                         m_label_free(new_sl);   /* OK if null */
1083 #else   /* !sun */
1084                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1085                             "mlslabel is not supported on FreeBSD"));
1086                         (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1087 #endif  /* !sun */
1088                         goto error;
1089
1090                 }
1091
1092                 case ZFS_PROP_MOUNTPOINT:
1093                 {
1094                         namecheck_err_t why;
1095
1096                         if (strcmp(strval, ZFS_MOUNTPOINT_NONE) == 0 ||
1097                             strcmp(strval, ZFS_MOUNTPOINT_LEGACY) == 0)
1098                                 break;
1099
1100                         if (mountpoint_namecheck(strval, &why)) {
1101                                 switch (why) {
1102                                 case NAME_ERR_LEADING_SLASH:
1103                                         zfs_error_aux(hdl,
1104                                             dgettext(TEXT_DOMAIN,
1105                                             "'%s' must be an absolute path, "
1106                                             "'none', or 'legacy'"), propname);
1107                                         break;
1108                                 case NAME_ERR_TOOLONG:
1109                                         zfs_error_aux(hdl,
1110                                             dgettext(TEXT_DOMAIN,
1111                                             "component of '%s' is too long"),
1112                                             propname);
1113                                         break;
1114                                 }
1115                                 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1116                                 goto error;
1117                         }
1118                 }
1119
1120                         /*FALLTHRU*/
1121
1122                 case ZFS_PROP_SHARESMB:
1123                 case ZFS_PROP_SHARENFS:
1124                         /*
1125                          * For the mountpoint and sharenfs or sharesmb
1126                          * properties, check if it can be set in a
1127                          * global/non-global zone based on
1128                          * the zoned property value:
1129                          *
1130                          *              global zone         non-global zone
1131                          * --------------------------------------------------
1132                          * zoned=on     mountpoint (no)     mountpoint (yes)
1133                          *              sharenfs (no)       sharenfs (no)
1134                          *              sharesmb (no)       sharesmb (no)
1135                          *
1136                          * zoned=off    mountpoint (yes)        N/A
1137                          *              sharenfs (yes)
1138                          *              sharesmb (yes)
1139                          */
1140                         if (zoned) {
1141                                 if (getzoneid() == GLOBAL_ZONEID) {
1142                                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1143                                             "'%s' cannot be set on "
1144                                             "dataset in a non-global zone"),
1145                                             propname);
1146                                         (void) zfs_error(hdl, EZFS_ZONED,
1147                                             errbuf);
1148                                         goto error;
1149                                 } else if (prop == ZFS_PROP_SHARENFS ||
1150                                     prop == ZFS_PROP_SHARESMB) {
1151                                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1152                                             "'%s' cannot be set in "
1153                                             "a non-global zone"), propname);
1154                                         (void) zfs_error(hdl, EZFS_ZONED,
1155                                             errbuf);
1156                                         goto error;
1157                                 }
1158                         } else if (getzoneid() != GLOBAL_ZONEID) {
1159                                 /*
1160                                  * If zoned property is 'off', this must be in
1161                                  * a global zone. If not, something is wrong.
1162                                  */
1163                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1164                                     "'%s' cannot be set while dataset "
1165                                     "'zoned' property is set"), propname);
1166                                 (void) zfs_error(hdl, EZFS_ZONED, errbuf);
1167                                 goto error;
1168                         }
1169
1170                         /*
1171                          * At this point, it is legitimate to set the
1172                          * property. Now we want to make sure that the
1173                          * property value is valid if it is sharenfs.
1174                          */
1175                         if ((prop == ZFS_PROP_SHARENFS ||
1176                             prop == ZFS_PROP_SHARESMB) &&
1177                             strcmp(strval, "on") != 0 &&
1178                             strcmp(strval, "off") != 0) {
1179                                 zfs_share_proto_t proto;
1180
1181                                 if (prop == ZFS_PROP_SHARESMB)
1182                                         proto = PROTO_SMB;
1183                                 else
1184                                         proto = PROTO_NFS;
1185
1186                                 /*
1187                                  * Must be an valid sharing protocol
1188                                  * option string so init the libshare
1189                                  * in order to enable the parser and
1190                                  * then parse the options. We use the
1191                                  * control API since we don't care about
1192                                  * the current configuration and don't
1193                                  * want the overhead of loading it
1194                                  * until we actually do something.
1195                                  */
1196
1197                                 if (zfs_init_libshare(hdl,
1198                                     SA_INIT_CONTROL_API) != SA_OK) {
1199                                         /*
1200                                          * An error occurred so we can't do
1201                                          * anything
1202                                          */
1203                                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1204                                             "'%s' cannot be set: problem "
1205                                             "in share initialization"),
1206                                             propname);
1207                                         (void) zfs_error(hdl, EZFS_BADPROP,
1208                                             errbuf);
1209                                         goto error;
1210                                 }
1211
1212                                 if (zfs_parse_options(strval, proto) != SA_OK) {
1213                                         /*
1214                                          * There was an error in parsing so
1215                                          * deal with it by issuing an error
1216                                          * message and leaving after
1217                                          * uninitializing the the libshare
1218                                          * interface.
1219                                          */
1220                                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1221                                             "'%s' cannot be set to invalid "
1222                                             "options"), propname);
1223                                         (void) zfs_error(hdl, EZFS_BADPROP,
1224                                             errbuf);
1225                                         zfs_uninit_libshare(hdl);
1226                                         goto error;
1227                                 }
1228                                 zfs_uninit_libshare(hdl);
1229                         }
1230
1231                         break;
1232                 case ZFS_PROP_UTF8ONLY:
1233                         chosen_utf = (int)intval;
1234                         break;
1235                 case ZFS_PROP_NORMALIZE:
1236                         chosen_normal = (int)intval;
1237                         break;
1238                 }
1239
1240                 /*
1241                  * For changes to existing volumes, we have some additional
1242                  * checks to enforce.
1243                  */
1244                 if (type == ZFS_TYPE_VOLUME && zhp != NULL) {
1245                         uint64_t volsize = zfs_prop_get_int(zhp,
1246                             ZFS_PROP_VOLSIZE);
1247                         uint64_t blocksize = zfs_prop_get_int(zhp,
1248                             ZFS_PROP_VOLBLOCKSIZE);
1249                         char buf[64];
1250
1251                         switch (prop) {
1252                         case ZFS_PROP_RESERVATION:
1253                         case ZFS_PROP_REFRESERVATION:
1254                                 if (intval > volsize) {
1255                                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1256                                             "'%s' is greater than current "
1257                                             "volume size"), propname);
1258                                         (void) zfs_error(hdl, EZFS_BADPROP,
1259                                             errbuf);
1260                                         goto error;
1261                                 }
1262                                 break;
1263
1264                         case ZFS_PROP_VOLSIZE:
1265                                 if (intval % blocksize != 0) {
1266                                         zfs_nicenum(blocksize, buf,
1267                                             sizeof (buf));
1268                                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1269                                             "'%s' must be a multiple of "
1270                                             "volume block size (%s)"),
1271                                             propname, buf);
1272                                         (void) zfs_error(hdl, EZFS_BADPROP,
1273                                             errbuf);
1274                                         goto error;
1275                                 }
1276
1277                                 if (intval == 0) {
1278                                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1279                                             "'%s' cannot be zero"),
1280                                             propname);
1281                                         (void) zfs_error(hdl, EZFS_BADPROP,
1282                                             errbuf);
1283                                         goto error;
1284                                 }
1285                                 break;
1286                         }
1287                 }
1288         }
1289
1290         /*
1291          * If normalization was chosen, but no UTF8 choice was made,
1292          * enforce rejection of non-UTF8 names.
1293          *
1294          * If normalization was chosen, but rejecting non-UTF8 names
1295          * was explicitly not chosen, it is an error.
1296          */
1297         if (chosen_normal > 0 && chosen_utf < 0) {
1298                 if (nvlist_add_uint64(ret,
1299                     zfs_prop_to_name(ZFS_PROP_UTF8ONLY), 1) != 0) {
1300                         (void) no_memory(hdl);
1301                         goto error;
1302                 }
1303         } else if (chosen_normal > 0 && chosen_utf == 0) {
1304                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1305                     "'%s' must be set 'on' if normalization chosen"),
1306                     zfs_prop_to_name(ZFS_PROP_UTF8ONLY));
1307                 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1308                 goto error;
1309         }
1310         return (ret);
1311
1312 error:
1313         nvlist_free(ret);
1314         return (NULL);
1315 }
1316
1317 int
1318 zfs_add_synthetic_resv(zfs_handle_t *zhp, nvlist_t *nvl)
1319 {
1320         uint64_t old_volsize;
1321         uint64_t new_volsize;
1322         uint64_t old_reservation;
1323         uint64_t new_reservation;
1324         zfs_prop_t resv_prop;
1325
1326         /*
1327          * If this is an existing volume, and someone is setting the volsize,
1328          * make sure that it matches the reservation, or add it if necessary.
1329          */
1330         old_volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE);
1331         if (zfs_which_resv_prop(zhp, &resv_prop) < 0)
1332                 return (-1);
1333         old_reservation = zfs_prop_get_int(zhp, resv_prop);
1334         if ((zvol_volsize_to_reservation(old_volsize, zhp->zfs_props) !=
1335             old_reservation) || nvlist_lookup_uint64(nvl,
1336             zfs_prop_to_name(resv_prop), &new_reservation) != ENOENT) {
1337                 return (0);
1338         }
1339         if (nvlist_lookup_uint64(nvl, zfs_prop_to_name(ZFS_PROP_VOLSIZE),
1340             &new_volsize) != 0)
1341                 return (-1);
1342         new_reservation = zvol_volsize_to_reservation(new_volsize,
1343             zhp->zfs_props);
1344         if (nvlist_add_uint64(nvl, zfs_prop_to_name(resv_prop),
1345             new_reservation) != 0) {
1346                 (void) no_memory(zhp->zfs_hdl);
1347                 return (-1);
1348         }
1349         return (1);
1350 }
1351
1352 void
1353 zfs_setprop_error(libzfs_handle_t *hdl, zfs_prop_t prop, int err,
1354     char *errbuf)
1355 {
1356         switch (err) {
1357
1358         case ENOSPC:
1359                 /*
1360                  * For quotas and reservations, ENOSPC indicates
1361                  * something different; setting a quota or reservation
1362                  * doesn't use any disk space.
1363                  */
1364                 switch (prop) {
1365                 case ZFS_PROP_QUOTA:
1366                 case ZFS_PROP_REFQUOTA:
1367                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1368                             "size is less than current used or "
1369                             "reserved space"));
1370                         (void) zfs_error(hdl, EZFS_PROPSPACE, errbuf);
1371                         break;
1372
1373                 case ZFS_PROP_RESERVATION:
1374                 case ZFS_PROP_REFRESERVATION:
1375                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1376                             "size is greater than available space"));
1377                         (void) zfs_error(hdl, EZFS_PROPSPACE, errbuf);
1378                         break;
1379
1380                 default:
1381                         (void) zfs_standard_error(hdl, err, errbuf);
1382                         break;
1383                 }
1384                 break;
1385
1386         case EBUSY:
1387                 (void) zfs_standard_error(hdl, EBUSY, errbuf);
1388                 break;
1389
1390         case EROFS:
1391                 (void) zfs_error(hdl, EZFS_DSREADONLY, errbuf);
1392                 break;
1393
1394         case ENOTSUP:
1395                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1396                     "pool and or dataset must be upgraded to set this "
1397                     "property or value"));
1398                 (void) zfs_error(hdl, EZFS_BADVERSION, errbuf);
1399                 break;
1400
1401         case ERANGE:
1402                 if (prop == ZFS_PROP_COMPRESSION) {
1403                         (void) zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1404                             "property setting is not allowed on "
1405                             "bootable datasets"));
1406                         (void) zfs_error(hdl, EZFS_NOTSUP, errbuf);
1407                 } else {
1408                         (void) zfs_standard_error(hdl, err, errbuf);
1409                 }
1410                 break;
1411
1412         case EINVAL:
1413                 if (prop == ZPROP_INVAL) {
1414                         (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1415                 } else {
1416                         (void) zfs_standard_error(hdl, err, errbuf);
1417                 }
1418                 break;
1419
1420         case EOVERFLOW:
1421                 /*
1422                  * This platform can't address a volume this big.
1423                  */
1424 #ifdef _ILP32
1425                 if (prop == ZFS_PROP_VOLSIZE) {
1426                         (void) zfs_error(hdl, EZFS_VOLTOOBIG, errbuf);
1427                         break;
1428                 }
1429 #endif
1430                 /* FALLTHROUGH */
1431         default:
1432                 (void) zfs_standard_error(hdl, err, errbuf);
1433         }
1434 }
1435
1436 /*
1437  * Given a property name and value, set the property for the given dataset.
1438  */
1439 int
1440 zfs_prop_set(zfs_handle_t *zhp, const char *propname, const char *propval)
1441 {
1442         zfs_cmd_t zc = { 0 };
1443         int ret = -1;
1444         prop_changelist_t *cl = NULL;
1445         char errbuf[1024];
1446         libzfs_handle_t *hdl = zhp->zfs_hdl;
1447         nvlist_t *nvl = NULL, *realprops;
1448         zfs_prop_t prop;
1449         boolean_t do_prefix = B_TRUE;
1450         int added_resv;
1451
1452         (void) snprintf(errbuf, sizeof (errbuf),
1453             dgettext(TEXT_DOMAIN, "cannot set property for '%s'"),
1454             zhp->zfs_name);
1455
1456         if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0) != 0 ||
1457             nvlist_add_string(nvl, propname, propval) != 0) {
1458                 (void) no_memory(hdl);
1459                 goto error;
1460         }
1461
1462         if ((realprops = zfs_valid_proplist(hdl, zhp->zfs_type, nvl,
1463             zfs_prop_get_int(zhp, ZFS_PROP_ZONED), zhp, errbuf)) == NULL)
1464                 goto error;
1465
1466         nvlist_free(nvl);
1467         nvl = realprops;
1468
1469         prop = zfs_name_to_prop(propname);
1470
1471         /* We don't support those properties on FreeBSD. */
1472         switch (prop) {
1473         case ZFS_PROP_DEVICES:
1474         case ZFS_PROP_ISCSIOPTIONS:
1475         case ZFS_PROP_XATTR:
1476         case ZFS_PROP_VSCAN:
1477         case ZFS_PROP_NBMAND:
1478         case ZFS_PROP_MLSLABEL:
1479                 (void) snprintf(errbuf, sizeof (errbuf),
1480                     "property '%s' not supported on FreeBSD", propname);
1481                 ret = zfs_error(hdl, EZFS_PERM, errbuf);
1482                 goto error;
1483         }
1484
1485         if (prop == ZFS_PROP_VOLSIZE) {
1486                 if ((added_resv = zfs_add_synthetic_resv(zhp, nvl)) == -1)
1487                         goto error;
1488         }
1489
1490         if ((cl = changelist_gather(zhp, prop, 0, 0)) == NULL)
1491                 goto error;
1492
1493         if (prop == ZFS_PROP_MOUNTPOINT && changelist_haszonedchild(cl)) {
1494                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1495                     "child dataset with inherited mountpoint is used "
1496                     "in a non-global zone"));
1497                 ret = zfs_error(hdl, EZFS_ZONED, errbuf);
1498                 goto error;
1499         }
1500
1501         /*
1502          * We don't want to unmount & remount the dataset when changing
1503          * its canmount property to 'on' or 'noauto'.  We only use
1504          * the changelist logic to unmount when setting canmount=off.
1505          */
1506         if (prop == ZFS_PROP_CANMOUNT) {
1507                 uint64_t idx;
1508                 int err = zprop_string_to_index(prop, propval, &idx,
1509                     ZFS_TYPE_DATASET);
1510                 if (err == 0 && idx != ZFS_CANMOUNT_OFF)
1511                         do_prefix = B_FALSE;
1512         }
1513
1514         if (do_prefix && (ret = changelist_prefix(cl)) != 0)
1515                 goto error;
1516
1517         /*
1518          * Execute the corresponding ioctl() to set this property.
1519          */
1520         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
1521
1522         if (zcmd_write_src_nvlist(hdl, &zc, nvl) != 0)
1523                 goto error;
1524
1525         ret = zfs_ioctl(hdl, ZFS_IOC_SET_PROP, &zc);
1526
1527         if (ret != 0) {
1528                 zfs_setprop_error(hdl, prop, errno, errbuf);
1529                 if (added_resv && errno == ENOSPC) {
1530                         /* clean up the volsize property we tried to set */
1531                         uint64_t old_volsize = zfs_prop_get_int(zhp,
1532                             ZFS_PROP_VOLSIZE);
1533                         nvlist_free(nvl);
1534                         zcmd_free_nvlists(&zc);
1535                         if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0) != 0)
1536                                 goto error;
1537                         if (nvlist_add_uint64(nvl,
1538                             zfs_prop_to_name(ZFS_PROP_VOLSIZE),
1539                             old_volsize) != 0)
1540                                 goto error;
1541                         if (zcmd_write_src_nvlist(hdl, &zc, nvl) != 0)
1542                                 goto error;
1543                         (void) zfs_ioctl(hdl, ZFS_IOC_SET_PROP, &zc);
1544                 }
1545         } else {
1546                 if (do_prefix)
1547                         ret = changelist_postfix(cl);
1548
1549                 /*
1550                  * Refresh the statistics so the new property value
1551                  * is reflected.
1552                  */
1553                 if (ret == 0)
1554                         (void) get_stats(zhp);
1555         }
1556
1557 error:
1558         nvlist_free(nvl);
1559         zcmd_free_nvlists(&zc);
1560         if (cl)
1561                 changelist_free(cl);
1562         return (ret);
1563 }
1564
1565 /*
1566  * Given a property, inherit the value from the parent dataset, or if received
1567  * is TRUE, revert to the received value, if any.
1568  */
1569 int
1570 zfs_prop_inherit(zfs_handle_t *zhp, const char *propname, boolean_t received)
1571 {
1572         zfs_cmd_t zc = { 0 };
1573         int ret;
1574         prop_changelist_t *cl;
1575         libzfs_handle_t *hdl = zhp->zfs_hdl;
1576         char errbuf[1024];
1577         zfs_prop_t prop;
1578
1579         (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
1580             "cannot inherit %s for '%s'"), propname, zhp->zfs_name);
1581
1582         zc.zc_cookie = received;
1583         if ((prop = zfs_name_to_prop(propname)) == ZPROP_INVAL) {
1584                 /*
1585                  * For user properties, the amount of work we have to do is very
1586                  * small, so just do it here.
1587                  */
1588                 if (!zfs_prop_user(propname)) {
1589                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1590                             "invalid property"));
1591                         return (zfs_error(hdl, EZFS_BADPROP, errbuf));
1592                 }
1593
1594                 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
1595                 (void) strlcpy(zc.zc_value, propname, sizeof (zc.zc_value));
1596
1597                 if (zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_INHERIT_PROP, &zc) != 0)
1598                         return (zfs_standard_error(hdl, errno, errbuf));
1599
1600                 return (0);
1601         }
1602
1603         /*
1604          * Verify that this property is inheritable.
1605          */
1606         if (zfs_prop_readonly(prop))
1607                 return (zfs_error(hdl, EZFS_PROPREADONLY, errbuf));
1608
1609         if (!zfs_prop_inheritable(prop) && !received)
1610                 return (zfs_error(hdl, EZFS_PROPNONINHERIT, errbuf));
1611
1612         /*
1613          * Check to see if the value applies to this type
1614          */
1615         if (!zfs_prop_valid_for_type(prop, zhp->zfs_type))
1616                 return (zfs_error(hdl, EZFS_PROPTYPE, errbuf));
1617
1618         /*
1619          * Normalize the name, to get rid of shorthand abbreviations.
1620          */
1621         propname = zfs_prop_to_name(prop);
1622         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
1623         (void) strlcpy(zc.zc_value, propname, sizeof (zc.zc_value));
1624
1625         if (prop == ZFS_PROP_MOUNTPOINT && getzoneid() == GLOBAL_ZONEID &&
1626             zfs_prop_get_int(zhp, ZFS_PROP_ZONED)) {
1627                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1628                     "dataset is used in a non-global zone"));
1629                 return (zfs_error(hdl, EZFS_ZONED, errbuf));
1630         }
1631
1632         /*
1633          * Determine datasets which will be affected by this change, if any.
1634          */
1635         if ((cl = changelist_gather(zhp, prop, 0, 0)) == NULL)
1636                 return (-1);
1637
1638         if (prop == ZFS_PROP_MOUNTPOINT && changelist_haszonedchild(cl)) {
1639                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1640                     "child dataset with inherited mountpoint is used "
1641                     "in a non-global zone"));
1642                 ret = zfs_error(hdl, EZFS_ZONED, errbuf);
1643                 goto error;
1644         }
1645
1646         if ((ret = changelist_prefix(cl)) != 0)
1647                 goto error;
1648
1649         if ((ret = zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_INHERIT_PROP, &zc)) != 0) {
1650                 return (zfs_standard_error(hdl, errno, errbuf));
1651         } else {
1652
1653                 if ((ret = changelist_postfix(cl)) != 0)
1654                         goto error;
1655
1656                 /*
1657                  * Refresh the statistics so the new property is reflected.
1658                  */
1659                 (void) get_stats(zhp);
1660         }
1661
1662 error:
1663         changelist_free(cl);
1664         return (ret);
1665 }
1666
1667 /*
1668  * True DSL properties are stored in an nvlist.  The following two functions
1669  * extract them appropriately.
1670  */
1671 static uint64_t
1672 getprop_uint64(zfs_handle_t *zhp, zfs_prop_t prop, char **source)
1673 {
1674         nvlist_t *nv;
1675         uint64_t value;
1676
1677         *source = NULL;
1678         if (nvlist_lookup_nvlist(zhp->zfs_props,
1679             zfs_prop_to_name(prop), &nv) == 0) {
1680                 verify(nvlist_lookup_uint64(nv, ZPROP_VALUE, &value) == 0);
1681                 (void) nvlist_lookup_string(nv, ZPROP_SOURCE, source);
1682         } else {
1683                 verify(!zhp->zfs_props_table ||
1684                     zhp->zfs_props_table[prop] == B_TRUE);
1685                 value = zfs_prop_default_numeric(prop);
1686                 *source = "";
1687         }
1688
1689         return (value);
1690 }
1691
1692 static char *
1693 getprop_string(zfs_handle_t *zhp, zfs_prop_t prop, char **source)
1694 {
1695         nvlist_t *nv;
1696         char *value;
1697
1698         *source = NULL;
1699         if (nvlist_lookup_nvlist(zhp->zfs_props,
1700             zfs_prop_to_name(prop), &nv) == 0) {
1701                 verify(nvlist_lookup_string(nv, ZPROP_VALUE, &value) == 0);
1702                 (void) nvlist_lookup_string(nv, ZPROP_SOURCE, source);
1703         } else {
1704                 verify(!zhp->zfs_props_table ||
1705                     zhp->zfs_props_table[prop] == B_TRUE);
1706                 if ((value = (char *)zfs_prop_default_string(prop)) == NULL)
1707                         value = "";
1708                 *source = "";
1709         }
1710
1711         return (value);
1712 }
1713
1714 static boolean_t
1715 zfs_is_recvd_props_mode(zfs_handle_t *zhp)
1716 {
1717         return (zhp->zfs_props == zhp->zfs_recvd_props);
1718 }
1719
1720 static void
1721 zfs_set_recvd_props_mode(zfs_handle_t *zhp, uint64_t *cookie)
1722 {
1723         *cookie = (uint64_t)(uintptr_t)zhp->zfs_props;
1724         zhp->zfs_props = zhp->zfs_recvd_props;
1725 }
1726
1727 static void
1728 zfs_unset_recvd_props_mode(zfs_handle_t *zhp, uint64_t *cookie)
1729 {
1730         zhp->zfs_props = (nvlist_t *)(uintptr_t)*cookie;
1731         *cookie = 0;
1732 }
1733
1734 /*
1735  * Internal function for getting a numeric property.  Both zfs_prop_get() and
1736  * zfs_prop_get_int() are built using this interface.
1737  *
1738  * Certain properties can be overridden using 'mount -o'.  In this case, scan
1739  * the contents of the /etc/mnttab entry, searching for the appropriate options.
1740  * If they differ from the on-disk values, report the current values and mark
1741  * the source "temporary".
1742  */
1743 static int
1744 get_numeric_property(zfs_handle_t *zhp, zfs_prop_t prop, zprop_source_t *src,
1745     char **source, uint64_t *val)
1746 {
1747         zfs_cmd_t zc = { 0 };
1748         nvlist_t *zplprops = NULL;
1749         struct mnttab mnt;
1750         char *mntopt_on = NULL;
1751         char *mntopt_off = NULL;
1752         boolean_t received = zfs_is_recvd_props_mode(zhp);
1753
1754         *source = NULL;
1755
1756         switch (prop) {
1757         case ZFS_PROP_ATIME:
1758                 mntopt_on = MNTOPT_ATIME;
1759                 mntopt_off = MNTOPT_NOATIME;
1760                 break;
1761
1762         case ZFS_PROP_DEVICES:
1763                 mntopt_on = MNTOPT_DEVICES;
1764                 mntopt_off = MNTOPT_NODEVICES;
1765                 break;
1766
1767         case ZFS_PROP_EXEC:
1768                 mntopt_on = MNTOPT_EXEC;
1769                 mntopt_off = MNTOPT_NOEXEC;
1770                 break;
1771
1772         case ZFS_PROP_READONLY:
1773                 mntopt_on = MNTOPT_RO;
1774                 mntopt_off = MNTOPT_RW;
1775                 break;
1776
1777         case ZFS_PROP_SETUID:
1778                 mntopt_on = MNTOPT_SETUID;
1779                 mntopt_off = MNTOPT_NOSETUID;
1780                 break;
1781
1782         case ZFS_PROP_XATTR:
1783                 mntopt_on = MNTOPT_XATTR;
1784                 mntopt_off = MNTOPT_NOXATTR;
1785                 break;
1786
1787         case ZFS_PROP_NBMAND:
1788                 mntopt_on = MNTOPT_NBMAND;
1789                 mntopt_off = MNTOPT_NONBMAND;
1790                 break;
1791         }
1792
1793         /*
1794          * Because looking up the mount options is potentially expensive
1795          * (iterating over all of /etc/mnttab), we defer its calculation until
1796          * we're looking up a property which requires its presence.
1797          */
1798         if (!zhp->zfs_mntcheck &&
1799             (mntopt_on != NULL || prop == ZFS_PROP_MOUNTED)) {
1800                 libzfs_handle_t *hdl = zhp->zfs_hdl;
1801                 struct mnttab entry;
1802
1803                 if (libzfs_mnttab_find(hdl, zhp->zfs_name, &entry) == 0) {
1804                         zhp->zfs_mntopts = zfs_strdup(hdl,
1805                             entry.mnt_mntopts);
1806                         if (zhp->zfs_mntopts == NULL)
1807                                 return (-1);
1808                 }
1809
1810                 zhp->zfs_mntcheck = B_TRUE;
1811         }
1812
1813         if (zhp->zfs_mntopts == NULL)
1814                 mnt.mnt_mntopts = "";
1815         else
1816                 mnt.mnt_mntopts = zhp->zfs_mntopts;
1817
1818         switch (prop) {
1819         case ZFS_PROP_ATIME:
1820         case ZFS_PROP_DEVICES:
1821         case ZFS_PROP_EXEC:
1822         case ZFS_PROP_READONLY:
1823         case ZFS_PROP_SETUID:
1824         case ZFS_PROP_XATTR:
1825         case ZFS_PROP_NBMAND:
1826                 *val = getprop_uint64(zhp, prop, source);
1827
1828                 if (received)
1829                         break;
1830
1831                 if (hasmntopt(&mnt, mntopt_on) && !*val) {
1832                         *val = B_TRUE;
1833                         if (src)
1834                                 *src = ZPROP_SRC_TEMPORARY;
1835                 } else if (hasmntopt(&mnt, mntopt_off) && *val) {
1836                         *val = B_FALSE;
1837                         if (src)
1838                                 *src = ZPROP_SRC_TEMPORARY;
1839                 }
1840                 break;
1841
1842         case ZFS_PROP_CANMOUNT:
1843         case ZFS_PROP_VOLSIZE:
1844         case ZFS_PROP_QUOTA:
1845         case ZFS_PROP_REFQUOTA:
1846         case ZFS_PROP_RESERVATION:
1847         case ZFS_PROP_REFRESERVATION:
1848                 *val = getprop_uint64(zhp, prop, source);
1849
1850                 if (*source == NULL) {
1851                         /* not default, must be local */
1852                         *source = zhp->zfs_name;
1853                 }
1854                 break;
1855
1856         case ZFS_PROP_MOUNTED:
1857                 *val = (zhp->zfs_mntopts != NULL);
1858                 break;
1859
1860         case ZFS_PROP_NUMCLONES:
1861                 *val = zhp->zfs_dmustats.dds_num_clones;
1862                 break;
1863
1864         case ZFS_PROP_VERSION:
1865         case ZFS_PROP_NORMALIZE:
1866         case ZFS_PROP_UTF8ONLY:
1867         case ZFS_PROP_CASE:
1868                 if (!zfs_prop_valid_for_type(prop, zhp->zfs_head_type) ||
1869                     zcmd_alloc_dst_nvlist(zhp->zfs_hdl, &zc, 0) != 0)
1870                         return (-1);
1871                 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
1872                 if (zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_OBJSET_ZPLPROPS, &zc)) {
1873                         zcmd_free_nvlists(&zc);
1874                         return (-1);
1875                 }
1876                 if (zcmd_read_dst_nvlist(zhp->zfs_hdl, &zc, &zplprops) != 0 ||
1877                     nvlist_lookup_uint64(zplprops, zfs_prop_to_name(prop),
1878                     val) != 0) {
1879                         zcmd_free_nvlists(&zc);
1880                         return (-1);
1881                 }
1882                 if (zplprops)
1883                         nvlist_free(zplprops);
1884                 zcmd_free_nvlists(&zc);
1885                 break;
1886
1887         default:
1888                 switch (zfs_prop_get_type(prop)) {
1889                 case PROP_TYPE_NUMBER:
1890                 case PROP_TYPE_INDEX:
1891                         *val = getprop_uint64(zhp, prop, source);
1892                         /*
1893                          * If we tried to use a default value for a
1894                          * readonly property, it means that it was not
1895                          * present.
1896                          */
1897                         if (zfs_prop_readonly(prop) &&
1898                             *source != NULL && (*source)[0] == '\0') {
1899                                 *source = NULL;
1900                         }
1901                         break;
1902
1903                 case PROP_TYPE_STRING:
1904                 default:
1905                         zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN,
1906                             "cannot get non-numeric property"));
1907                         return (zfs_error(zhp->zfs_hdl, EZFS_BADPROP,
1908                             dgettext(TEXT_DOMAIN, "internal error")));
1909                 }
1910         }
1911
1912         return (0);
1913 }
1914
1915 /*
1916  * Calculate the source type, given the raw source string.
1917  */
1918 static void
1919 get_source(zfs_handle_t *zhp, zprop_source_t *srctype, char *source,
1920     char *statbuf, size_t statlen)
1921 {
1922         if (statbuf == NULL || *srctype == ZPROP_SRC_TEMPORARY)
1923                 return;
1924
1925         if (source == NULL) {
1926                 *srctype = ZPROP_SRC_NONE;
1927         } else if (source[0] == '\0') {
1928                 *srctype = ZPROP_SRC_DEFAULT;
1929         } else if (strstr(source, ZPROP_SOURCE_VAL_RECVD) != NULL) {
1930                 *srctype = ZPROP_SRC_RECEIVED;
1931         } else {
1932                 if (strcmp(source, zhp->zfs_name) == 0) {
1933                         *srctype = ZPROP_SRC_LOCAL;
1934                 } else {
1935                         (void) strlcpy(statbuf, source, statlen);
1936                         *srctype = ZPROP_SRC_INHERITED;
1937                 }
1938         }
1939
1940 }
1941
1942 int
1943 zfs_prop_get_recvd(zfs_handle_t *zhp, const char *propname, char *propbuf,
1944     size_t proplen, boolean_t literal)
1945 {
1946         zfs_prop_t prop;
1947         int err = 0;
1948
1949         if (zhp->zfs_recvd_props == NULL)
1950                 if (get_recvd_props_ioctl(zhp) != 0)
1951                         return (-1);
1952
1953         prop = zfs_name_to_prop(propname);
1954
1955         if (prop != ZPROP_INVAL) {
1956                 uint64_t cookie;
1957                 if (!nvlist_exists(zhp->zfs_recvd_props, propname))
1958                         return (-1);
1959                 zfs_set_recvd_props_mode(zhp, &cookie);
1960                 err = zfs_prop_get(zhp, prop, propbuf, proplen,
1961                     NULL, NULL, 0, literal);
1962                 zfs_unset_recvd_props_mode(zhp, &cookie);
1963         } else {
1964                 nvlist_t *propval;
1965                 char *recvdval;
1966                 if (nvlist_lookup_nvlist(zhp->zfs_recvd_props,
1967                     propname, &propval) != 0)
1968                         return (-1);
1969                 verify(nvlist_lookup_string(propval, ZPROP_VALUE,
1970                     &recvdval) == 0);
1971                 (void) strlcpy(propbuf, recvdval, proplen);
1972         }
1973
1974         return (err == 0 ? 0 : -1);
1975 }
1976
1977 static int
1978 get_clones_string(zfs_handle_t *zhp, char *propbuf, size_t proplen)
1979 {
1980         nvlist_t *value;
1981         nvpair_t *pair;
1982
1983         value = zfs_get_clones_nvl(zhp);
1984         if (value == NULL)
1985                 return (-1);
1986
1987         propbuf[0] = '\0';
1988         for (pair = nvlist_next_nvpair(value, NULL); pair != NULL;
1989             pair = nvlist_next_nvpair(value, pair)) {
1990                 if (propbuf[0] != '\0')
1991                         (void) strlcat(propbuf, ",", proplen);
1992                 (void) strlcat(propbuf, nvpair_name(pair), proplen);
1993         }
1994
1995         return (0);
1996 }
1997
1998 struct get_clones_arg {
1999         uint64_t numclones;
2000         nvlist_t *value;
2001         const char *origin;
2002         char buf[ZFS_MAXNAMELEN];
2003 };
2004
2005 int
2006 get_clones_cb(zfs_handle_t *zhp, void *arg)
2007 {
2008         struct get_clones_arg *gca = arg;
2009
2010         if (gca->numclones == 0) {
2011                 zfs_close(zhp);
2012                 return (0);
2013         }
2014
2015         if (zfs_prop_get(zhp, ZFS_PROP_ORIGIN, gca->buf, sizeof (gca->buf),
2016             NULL, NULL, 0, B_TRUE) != 0)
2017                 goto out;
2018         if (strcmp(gca->buf, gca->origin) == 0) {
2019                 fnvlist_add_boolean(gca->value, zfs_get_name(zhp));
2020                 gca->numclones--;
2021         }
2022
2023 out:
2024         (void) zfs_iter_children(zhp, get_clones_cb, gca);
2025         zfs_close(zhp);
2026         return (0);
2027 }
2028
2029 nvlist_t *
2030 zfs_get_clones_nvl(zfs_handle_t *zhp)
2031 {
2032         nvlist_t *nv, *value;
2033
2034         if (nvlist_lookup_nvlist(zhp->zfs_props,
2035             zfs_prop_to_name(ZFS_PROP_CLONES), &nv) != 0) {
2036                 struct get_clones_arg gca;
2037
2038                 /*
2039                  * if this is a snapshot, then the kernel wasn't able
2040                  * to get the clones.  Do it by slowly iterating.
2041                  */
2042                 if (zhp->zfs_type != ZFS_TYPE_SNAPSHOT)
2043                         return (NULL);
2044                 if (nvlist_alloc(&nv, NV_UNIQUE_NAME, 0) != 0)
2045                         return (NULL);
2046                 if (nvlist_alloc(&value, NV_UNIQUE_NAME, 0) != 0) {
2047                         nvlist_free(nv);
2048                         return (NULL);
2049                 }
2050
2051                 gca.numclones = zfs_prop_get_int(zhp, ZFS_PROP_NUMCLONES);
2052                 gca.value = value;
2053                 gca.origin = zhp->zfs_name;
2054
2055                 if (gca.numclones != 0) {
2056                         zfs_handle_t *root;
2057                         char pool[ZFS_MAXNAMELEN];
2058                         char *cp = pool;
2059
2060                         /* get the pool name */
2061                         (void) strlcpy(pool, zhp->zfs_name, sizeof (pool));
2062                         (void) strsep(&cp, "/@");
2063                         root = zfs_open(zhp->zfs_hdl, pool,
2064                             ZFS_TYPE_FILESYSTEM);
2065
2066                         (void) get_clones_cb(root, &gca);
2067                 }
2068
2069                 if (gca.numclones != 0 ||
2070                     nvlist_add_nvlist(nv, ZPROP_VALUE, value) != 0 ||
2071                     nvlist_add_nvlist(zhp->zfs_props,
2072                     zfs_prop_to_name(ZFS_PROP_CLONES), nv) != 0) {
2073                         nvlist_free(nv);
2074                         nvlist_free(value);
2075                         return (NULL);
2076                 }
2077                 nvlist_free(nv);
2078                 nvlist_free(value);
2079                 verify(0 == nvlist_lookup_nvlist(zhp->zfs_props,
2080                     zfs_prop_to_name(ZFS_PROP_CLONES), &nv));
2081         }
2082
2083         verify(nvlist_lookup_nvlist(nv, ZPROP_VALUE, &value) == 0);
2084
2085         return (value);
2086 }
2087
2088 /*
2089  * Retrieve a property from the given object.  If 'literal' is specified, then
2090  * numbers are left as exact values.  Otherwise, numbers are converted to a
2091  * human-readable form.
2092  *
2093  * Returns 0 on success, or -1 on error.
2094  */
2095 int
2096 zfs_prop_get(zfs_handle_t *zhp, zfs_prop_t prop, char *propbuf, size_t proplen,
2097     zprop_source_t *src, char *statbuf, size_t statlen, boolean_t literal)
2098 {
2099         char *source = NULL;
2100         uint64_t val;
2101         char *str;
2102         const char *strval;
2103         boolean_t received = zfs_is_recvd_props_mode(zhp);
2104
2105         /*
2106          * Check to see if this property applies to our object
2107          */
2108         if (!zfs_prop_valid_for_type(prop, zhp->zfs_type))
2109                 return (-1);
2110
2111         if (received && zfs_prop_readonly(prop))
2112                 return (-1);
2113
2114         if (src)
2115                 *src = ZPROP_SRC_NONE;
2116
2117         switch (prop) {
2118         case ZFS_PROP_CREATION:
2119                 /*
2120                  * 'creation' is a time_t stored in the statistics.  We convert
2121                  * this into a string unless 'literal' is specified.
2122                  */
2123                 {
2124                         val = getprop_uint64(zhp, prop, &source);
2125                         time_t time = (time_t)val;
2126                         struct tm t;
2127
2128                         if (literal ||
2129                             localtime_r(&time, &t) == NULL ||
2130                             strftime(propbuf, proplen, "%a %b %e %k:%M %Y",
2131                             &t) == 0)
2132                                 (void) snprintf(propbuf, proplen, "%llu", val);
2133                 }
2134                 break;
2135
2136         case ZFS_PROP_MOUNTPOINT:
2137                 /*
2138                  * Getting the precise mountpoint can be tricky.
2139                  *
2140                  *  - for 'none' or 'legacy', return those values.
2141                  *  - for inherited mountpoints, we want to take everything
2142                  *    after our ancestor and append it to the inherited value.
2143                  *
2144                  * If the pool has an alternate root, we want to prepend that
2145                  * root to any values we return.
2146                  */
2147
2148                 str = getprop_string(zhp, prop, &source);
2149
2150                 if (str[0] == '/') {
2151                         char buf[MAXPATHLEN];
2152                         char *root = buf;
2153                         const char *relpath;
2154
2155                         /*
2156                          * If we inherit the mountpoint, even from a dataset
2157                          * with a received value, the source will be the path of
2158                          * the dataset we inherit from. If source is
2159                          * ZPROP_SOURCE_VAL_RECVD, the received value is not
2160                          * inherited.
2161                          */
2162                         if (strcmp(source, ZPROP_SOURCE_VAL_RECVD) == 0) {
2163                                 relpath = "";
2164                         } else {
2165                                 relpath = zhp->zfs_name + strlen(source);
2166                                 if (relpath[0] == '/')
2167                                         relpath++;
2168                         }
2169
2170                         if ((zpool_get_prop(zhp->zpool_hdl,
2171                             ZPOOL_PROP_ALTROOT, buf, MAXPATHLEN, NULL)) ||
2172                             (strcmp(root, "-") == 0))
2173                                 root[0] = '\0';
2174                         /*
2175                          * Special case an alternate root of '/'. This will
2176                          * avoid having multiple leading slashes in the
2177                          * mountpoint path.
2178                          */
2179                         if (strcmp(root, "/") == 0)
2180                                 root++;
2181
2182                         /*
2183                          * If the mountpoint is '/' then skip over this
2184                          * if we are obtaining either an alternate root or
2185                          * an inherited mountpoint.
2186                          */
2187                         if (str[1] == '\0' && (root[0] != '\0' ||
2188                             relpath[0] != '\0'))
2189                                 str++;
2190
2191                         if (relpath[0] == '\0')
2192                                 (void) snprintf(propbuf, proplen, "%s%s",
2193                                     root, str);
2194                         else
2195                                 (void) snprintf(propbuf, proplen, "%s%s%s%s",
2196                                     root, str, relpath[0] == '@' ? "" : "/",
2197                                     relpath);
2198                 } else {
2199                         /* 'legacy' or 'none' */
2200                         (void) strlcpy(propbuf, str, proplen);
2201                 }
2202
2203                 break;
2204
2205         case ZFS_PROP_ORIGIN:
2206                 (void) strlcpy(propbuf, getprop_string(zhp, prop, &source),
2207                     proplen);
2208                 /*
2209                  * If there is no parent at all, return failure to indicate that
2210                  * it doesn't apply to this dataset.
2211                  */
2212                 if (propbuf[0] == '\0')
2213                         return (-1);
2214                 break;
2215
2216         case ZFS_PROP_CLONES:
2217                 if (get_clones_string(zhp, propbuf, proplen) != 0)
2218                         return (-1);
2219                 break;
2220
2221         case ZFS_PROP_QUOTA:
2222         case ZFS_PROP_REFQUOTA:
2223         case ZFS_PROP_RESERVATION:
2224         case ZFS_PROP_REFRESERVATION:
2225
2226                 if (get_numeric_property(zhp, prop, src, &source, &val) != 0)
2227                         return (-1);
2228
2229                 /*
2230                  * If quota or reservation is 0, we translate this into 'none'
2231                  * (unless literal is set), and indicate that it's the default
2232                  * value.  Otherwise, we print the number nicely and indicate
2233                  * that its set locally.
2234                  */
2235                 if (val == 0) {
2236                         if (literal)
2237                                 (void) strlcpy(propbuf, "0", proplen);
2238                         else
2239                                 (void) strlcpy(propbuf, "none", proplen);
2240                 } else {
2241                         if (literal)
2242                                 (void) snprintf(propbuf, proplen, "%llu",
2243                                     (u_longlong_t)val);
2244                         else
2245                                 zfs_nicenum(val, propbuf, proplen);
2246                 }
2247                 break;
2248
2249         case ZFS_PROP_REFRATIO:
2250         case ZFS_PROP_COMPRESSRATIO:
2251                 if (get_numeric_property(zhp, prop, src, &source, &val) != 0)
2252                         return (-1);
2253                 (void) snprintf(propbuf, proplen, "%llu.%02llux",
2254                     (u_longlong_t)(val / 100),
2255                     (u_longlong_t)(val % 100));
2256                 break;
2257
2258         case ZFS_PROP_TYPE:
2259                 switch (zhp->zfs_type) {
2260                 case ZFS_TYPE_FILESYSTEM:
2261                         str = "filesystem";
2262                         break;
2263                 case ZFS_TYPE_VOLUME:
2264                         str = "volume";
2265                         break;
2266                 case ZFS_TYPE_SNAPSHOT:
2267                         str = "snapshot";
2268                         break;
2269                 default:
2270                         abort();
2271                 }
2272                 (void) snprintf(propbuf, proplen, "%s", str);
2273                 break;
2274
2275         case ZFS_PROP_MOUNTED:
2276                 /*
2277                  * The 'mounted' property is a pseudo-property that described
2278                  * whether the filesystem is currently mounted.  Even though
2279                  * it's a boolean value, the typical values of "on" and "off"
2280                  * don't make sense, so we translate to "yes" and "no".
2281                  */
2282                 if (get_numeric_property(zhp, ZFS_PROP_MOUNTED,
2283                     src, &source, &val) != 0)
2284                         return (-1);
2285                 if (val)
2286                         (void) strlcpy(propbuf, "yes", proplen);
2287                 else
2288                         (void) strlcpy(propbuf, "no", proplen);
2289                 break;
2290
2291         case ZFS_PROP_NAME:
2292                 /*
2293                  * The 'name' property is a pseudo-property derived from the
2294                  * dataset name.  It is presented as a real property to simplify
2295                  * consumers.
2296                  */
2297                 (void) strlcpy(propbuf, zhp->zfs_name, proplen);
2298                 break;
2299
2300         case ZFS_PROP_MLSLABEL:
2301                 {
2302 #ifdef sun
2303                         m_label_t *new_sl = NULL;
2304                         char *ascii = NULL;     /* human readable label */
2305
2306                         (void) strlcpy(propbuf,
2307                             getprop_string(zhp, prop, &source), proplen);
2308
2309                         if (literal || (strcasecmp(propbuf,
2310                             ZFS_MLSLABEL_DEFAULT) == 0))
2311                                 break;
2312
2313                         /*
2314                          * Try to translate the internal hex string to
2315                          * human-readable output.  If there are any
2316                          * problems just use the hex string.
2317                          */
2318
2319                         if (str_to_label(propbuf, &new_sl, MAC_LABEL,
2320                             L_NO_CORRECTION, NULL) == -1) {
2321                                 m_label_free(new_sl);
2322                                 break;
2323                         }
2324
2325                         if (label_to_str(new_sl, &ascii, M_LABEL,
2326                             DEF_NAMES) != 0) {
2327                                 if (ascii)
2328                                         free(ascii);
2329                                 m_label_free(new_sl);
2330                                 break;
2331                         }
2332                         m_label_free(new_sl);
2333
2334                         (void) strlcpy(propbuf, ascii, proplen);
2335                         free(ascii);
2336 #else   /* !sun */
2337                         propbuf[0] = '\0';
2338 #endif  /* !sun */
2339                 }
2340                 break;
2341
2342         case ZFS_PROP_GUID:
2343                 /*
2344                  * GUIDs are stored as numbers, but they are identifiers.
2345                  * We don't want them to be pretty printed, because pretty
2346                  * printing mangles the ID into a truncated and useless value.
2347                  */
2348                 if (get_numeric_property(zhp, prop, src, &source, &val) != 0)
2349                         return (-1);
2350                 (void) snprintf(propbuf, proplen, "%llu", (u_longlong_t)val);
2351                 break;
2352
2353         default:
2354                 switch (zfs_prop_get_type(prop)) {
2355                 case PROP_TYPE_NUMBER:
2356                         if (get_numeric_property(zhp, prop, src,
2357                             &source, &val) != 0)
2358                                 return (-1);
2359                         if (literal)
2360                                 (void) snprintf(propbuf, proplen, "%llu",
2361                                     (u_longlong_t)val);
2362                         else
2363                                 zfs_nicenum(val, propbuf, proplen);
2364                         break;
2365
2366                 case PROP_TYPE_STRING:
2367                         (void) strlcpy(propbuf,
2368                             getprop_string(zhp, prop, &source), proplen);
2369                         break;
2370
2371                 case PROP_TYPE_INDEX:
2372                         if (get_numeric_property(zhp, prop, src,
2373                             &source, &val) != 0)
2374                                 return (-1);
2375                         if (zfs_prop_index_to_string(prop, val, &strval) != 0)
2376                                 return (-1);
2377                         (void) strlcpy(propbuf, strval, proplen);
2378                         break;
2379
2380                 default:
2381                         abort();
2382                 }
2383         }
2384
2385         get_source(zhp, src, source, statbuf, statlen);
2386
2387         return (0);
2388 }
2389
2390 /*
2391  * Utility function to get the given numeric property.  Does no validation that
2392  * the given property is the appropriate type; should only be used with
2393  * hard-coded property types.
2394  */
2395 uint64_t
2396 zfs_prop_get_int(zfs_handle_t *zhp, zfs_prop_t prop)
2397 {
2398         char *source;
2399         uint64_t val;
2400
2401         (void) get_numeric_property(zhp, prop, NULL, &source, &val);
2402
2403         return (val);
2404 }
2405
2406 int
2407 zfs_prop_set_int(zfs_handle_t *zhp, zfs_prop_t prop, uint64_t val)
2408 {
2409         char buf[64];
2410
2411         (void) snprintf(buf, sizeof (buf), "%llu", (longlong_t)val);
2412         return (zfs_prop_set(zhp, zfs_prop_to_name(prop), buf));
2413 }
2414
2415 /*
2416  * Similar to zfs_prop_get(), but returns the value as an integer.
2417  */
2418 int
2419 zfs_prop_get_numeric(zfs_handle_t *zhp, zfs_prop_t prop, uint64_t *value,
2420     zprop_source_t *src, char *statbuf, size_t statlen)
2421 {
2422         char *source;
2423
2424         /*
2425          * Check to see if this property applies to our object
2426          */
2427         if (!zfs_prop_valid_for_type(prop, zhp->zfs_type)) {
2428                 return (zfs_error_fmt(zhp->zfs_hdl, EZFS_PROPTYPE,
2429                     dgettext(TEXT_DOMAIN, "cannot get property '%s'"),
2430                     zfs_prop_to_name(prop)));
2431         }
2432
2433         if (src)
2434                 *src = ZPROP_SRC_NONE;
2435
2436         if (get_numeric_property(zhp, prop, src, &source, value) != 0)
2437                 return (-1);
2438
2439         get_source(zhp, src, source, statbuf, statlen);
2440
2441         return (0);
2442 }
2443
2444 static int
2445 idmap_id_to_numeric_domain_rid(uid_t id, boolean_t isuser,
2446     char **domainp, idmap_rid_t *ridp)
2447 {
2448 #ifdef sun
2449         idmap_get_handle_t *get_hdl = NULL;
2450         idmap_stat status;
2451         int err = EINVAL;
2452
2453         if (idmap_get_create(&get_hdl) != IDMAP_SUCCESS)
2454                 goto out;
2455
2456         if (isuser) {
2457                 err = idmap_get_sidbyuid(get_hdl, id,
2458                     IDMAP_REQ_FLG_USE_CACHE, domainp, ridp, &status);
2459         } else {
2460                 err = idmap_get_sidbygid(get_hdl, id,
2461                     IDMAP_REQ_FLG_USE_CACHE, domainp, ridp, &status);
2462         }
2463         if (err == IDMAP_SUCCESS &&
2464             idmap_get_mappings(get_hdl) == IDMAP_SUCCESS &&
2465             status == IDMAP_SUCCESS)
2466                 err = 0;
2467         else
2468                 err = EINVAL;
2469 out:
2470         if (get_hdl)
2471                 idmap_get_destroy(get_hdl);
2472         return (err);
2473 #else   /* !sun */
2474         assert(!"invalid code path");
2475 #endif  /* !sun */
2476 }
2477
2478 /*
2479  * convert the propname into parameters needed by kernel
2480  * Eg: userquota@ahrens -> ZFS_PROP_USERQUOTA, "", 126829
2481  * Eg: userused@matt@domain -> ZFS_PROP_USERUSED, "S-1-123-456", 789
2482  */
2483 static int
2484 userquota_propname_decode(const char *propname, boolean_t zoned,
2485     zfs_userquota_prop_t *typep, char *domain, int domainlen, uint64_t *ridp)
2486 {
2487         zfs_userquota_prop_t type;
2488         char *cp, *end;
2489         char *numericsid = NULL;
2490         boolean_t isuser;
2491
2492         domain[0] = '\0';
2493
2494         /* Figure out the property type ({user|group}{quota|space}) */
2495         for (type = 0; type < ZFS_NUM_USERQUOTA_PROPS; type++) {
2496                 if (strncmp(propname, zfs_userquota_prop_prefixes[type],
2497                     strlen(zfs_userquota_prop_prefixes[type])) == 0)
2498                         break;
2499         }
2500         if (type == ZFS_NUM_USERQUOTA_PROPS)
2501                 return (EINVAL);
2502         *typep = type;
2503
2504         isuser = (type == ZFS_PROP_USERQUOTA ||
2505             type == ZFS_PROP_USERUSED);
2506
2507         cp = strchr(propname, '@') + 1;
2508
2509         if (strchr(cp, '@')) {
2510 #ifdef sun
2511                 /*
2512                  * It's a SID name (eg "user@domain") that needs to be
2513                  * turned into S-1-domainID-RID.
2514                  */
2515                 directory_error_t e;
2516                 if (zoned && getzoneid() == GLOBAL_ZONEID)
2517                         return (ENOENT);
2518                 if (isuser) {
2519                         e = directory_sid_from_user_name(NULL,
2520                             cp, &numericsid);
2521                 } else {
2522                         e = directory_sid_from_group_name(NULL,
2523                             cp, &numericsid);
2524                 }
2525                 if (e != NULL) {
2526                         directory_error_free(e);
2527                         return (ENOENT);
2528                 }
2529                 if (numericsid == NULL)
2530                         return (ENOENT);
2531                 cp = numericsid;
2532                 /* will be further decoded below */
2533 #else   /* !sun */
2534                 return (ENOENT);
2535 #endif  /* !sun */
2536         }
2537
2538         if (strncmp(cp, "S-1-", 4) == 0) {
2539                 /* It's a numeric SID (eg "S-1-234-567-89") */
2540                 (void) strlcpy(domain, cp, domainlen);
2541                 cp = strrchr(domain, '-');
2542                 *cp = '\0';
2543                 cp++;
2544
2545                 errno = 0;
2546                 *ridp = strtoull(cp, &end, 10);
2547                 if (numericsid) {
2548                         free(numericsid);
2549                         numericsid = NULL;
2550                 }
2551                 if (errno != 0 || *end != '\0')
2552                         return (EINVAL);
2553         } else if (!isdigit(*cp)) {
2554                 /*
2555                  * It's a user/group name (eg "user") that needs to be
2556                  * turned into a uid/gid
2557                  */
2558                 if (zoned && getzoneid() == GLOBAL_ZONEID)
2559                         return (ENOENT);
2560                 if (isuser) {
2561                         struct passwd *pw;
2562                         pw = getpwnam(cp);
2563                         if (pw == NULL)
2564                                 return (ENOENT);
2565                         *ridp = pw->pw_uid;
2566                 } else {
2567                         struct group *gr;
2568                         gr = getgrnam(cp);
2569                         if (gr == NULL)
2570                                 return (ENOENT);
2571                         *ridp = gr->gr_gid;
2572                 }
2573         } else {
2574                 /* It's a user/group ID (eg "12345"). */
2575                 uid_t id = strtoul(cp, &end, 10);
2576                 idmap_rid_t rid;
2577                 char *mapdomain;
2578
2579                 if (*end != '\0')
2580                         return (EINVAL);
2581                 if (id > MAXUID) {
2582                         /* It's an ephemeral ID. */
2583                         if (idmap_id_to_numeric_domain_rid(id, isuser,
2584                             &mapdomain, &rid) != 0)
2585                                 return (ENOENT);
2586                         (void) strlcpy(domain, mapdomain, domainlen);
2587                         *ridp = rid;
2588                 } else {
2589                         *ridp = id;
2590                 }
2591         }
2592
2593         ASSERT3P(numericsid, ==, NULL);
2594         return (0);
2595 }
2596
2597 static int
2598 zfs_prop_get_userquota_common(zfs_handle_t *zhp, const char *propname,
2599     uint64_t *propvalue, zfs_userquota_prop_t *typep)
2600 {
2601         int err;
2602         zfs_cmd_t zc = { 0 };
2603
2604         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
2605
2606         err = userquota_propname_decode(propname,
2607             zfs_prop_get_int(zhp, ZFS_PROP_ZONED),
2608             typep, zc.zc_value, sizeof (zc.zc_value), &zc.zc_guid);
2609         zc.zc_objset_type = *typep;
2610         if (err)
2611                 return (err);
2612
2613         err = ioctl(zhp->zfs_hdl->libzfs_fd, ZFS_IOC_USERSPACE_ONE, &zc);
2614         if (err)
2615                 return (err);
2616
2617         *propvalue = zc.zc_cookie;
2618         return (0);
2619 }
2620
2621 int
2622 zfs_prop_get_userquota_int(zfs_handle_t *zhp, const char *propname,
2623     uint64_t *propvalue)
2624 {
2625         zfs_userquota_prop_t type;
2626
2627         return (zfs_prop_get_userquota_common(zhp, propname, propvalue,
2628             &type));
2629 }
2630
2631 int
2632 zfs_prop_get_userquota(zfs_handle_t *zhp, const char *propname,
2633     char *propbuf, int proplen, boolean_t literal)
2634 {
2635         int err;
2636         uint64_t propvalue;
2637         zfs_userquota_prop_t type;
2638
2639         err = zfs_prop_get_userquota_common(zhp, propname, &propvalue,
2640             &type);
2641
2642         if (err)
2643                 return (err);
2644
2645         if (literal) {
2646                 (void) snprintf(propbuf, proplen, "%llu", propvalue);
2647         } else if (propvalue == 0 &&
2648             (type == ZFS_PROP_USERQUOTA || type == ZFS_PROP_GROUPQUOTA)) {
2649                 (void) strlcpy(propbuf, "none", proplen);
2650         } else {
2651                 zfs_nicenum(propvalue, propbuf, proplen);
2652         }
2653         return (0);
2654 }
2655
2656 int
2657 zfs_prop_get_written_int(zfs_handle_t *zhp, const char *propname,
2658     uint64_t *propvalue)
2659 {
2660         int err;
2661         zfs_cmd_t zc = { 0 };
2662         const char *snapname;
2663
2664         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
2665
2666         snapname = strchr(propname, '@') + 1;
2667         if (strchr(snapname, '@')) {
2668                 (void) strlcpy(zc.zc_value, snapname, sizeof (zc.zc_value));
2669         } else {
2670                 /* snapname is the short name, append it to zhp's fsname */
2671                 char *cp;
2672
2673                 (void) strlcpy(zc.zc_value, zhp->zfs_name,
2674                     sizeof (zc.zc_value));
2675                 cp = strchr(zc.zc_value, '@');
2676                 if (cp != NULL)
2677                         *cp = '\0';
2678                 (void) strlcat(zc.zc_value, "@", sizeof (zc.zc_value));
2679                 (void) strlcat(zc.zc_value, snapname, sizeof (zc.zc_value));
2680         }
2681
2682         err = ioctl(zhp->zfs_hdl->libzfs_fd, ZFS_IOC_SPACE_WRITTEN, &zc);
2683         if (err)
2684                 return (err);
2685
2686         *propvalue = zc.zc_cookie;
2687         return (0);
2688 }
2689
2690 int
2691 zfs_prop_get_written(zfs_handle_t *zhp, const char *propname,
2692     char *propbuf, int proplen, boolean_t literal)
2693 {
2694         int err;
2695         uint64_t propvalue;
2696
2697         err = zfs_prop_get_written_int(zhp, propname, &propvalue);
2698
2699         if (err)
2700                 return (err);
2701
2702         if (literal) {
2703                 (void) snprintf(propbuf, proplen, "%llu", propvalue);
2704         } else {
2705                 zfs_nicenum(propvalue, propbuf, proplen);
2706         }
2707         return (0);
2708 }
2709
2710 /*
2711  * Returns the name of the given zfs handle.
2712  */
2713 const char *
2714 zfs_get_name(const zfs_handle_t *zhp)
2715 {
2716         return (zhp->zfs_name);
2717 }
2718
2719 /*
2720  * Returns the type of the given zfs handle.
2721  */
2722 zfs_type_t
2723 zfs_get_type(const zfs_handle_t *zhp)
2724 {
2725         return (zhp->zfs_type);
2726 }
2727
2728 /*
2729  * Is one dataset name a child dataset of another?
2730  *
2731  * Needs to handle these cases:
2732  * Dataset 1    "a/foo"         "a/foo"         "a/foo"         "a/foo"
2733  * Dataset 2    "a/fo"          "a/foobar"      "a/bar/baz"     "a/foo/bar"
2734  * Descendant?  No.             No.             No.             Yes.
2735  */
2736 static boolean_t
2737 is_descendant(const char *ds1, const char *ds2)
2738 {
2739         size_t d1len = strlen(ds1);
2740
2741         /* ds2 can't be a descendant if it's smaller */
2742         if (strlen(ds2) < d1len)
2743                 return (B_FALSE);
2744
2745         /* otherwise, compare strings and verify that there's a '/' char */
2746         return (ds2[d1len] == '/' && (strncmp(ds1, ds2, d1len) == 0));
2747 }
2748
2749 /*
2750  * Given a complete name, return just the portion that refers to the parent.
2751  * Will return -1 if there is no parent (path is just the name of the
2752  * pool).
2753  */
2754 static int
2755 parent_name(const char *path, char *buf, size_t buflen)
2756 {
2757         char *slashp;
2758
2759         (void) strlcpy(buf, path, buflen);
2760
2761         if ((slashp = strrchr(buf, '/')) == NULL)
2762                 return (-1);
2763         *slashp = '\0';
2764
2765         return (0);
2766 }
2767
2768 /*
2769  * If accept_ancestor is false, then check to make sure that the given path has
2770  * a parent, and that it exists.  If accept_ancestor is true, then find the
2771  * closest existing ancestor for the given path.  In prefixlen return the
2772  * length of already existing prefix of the given path.  We also fetch the
2773  * 'zoned' property, which is used to validate property settings when creating
2774  * new datasets.
2775  */
2776 static int
2777 check_parents(libzfs_handle_t *hdl, const char *path, uint64_t *zoned,
2778     boolean_t accept_ancestor, int *prefixlen)
2779 {
2780         zfs_cmd_t zc = { 0 };
2781         char parent[ZFS_MAXNAMELEN];
2782         char *slash;
2783         zfs_handle_t *zhp;
2784         char errbuf[1024];
2785         uint64_t is_zoned;
2786
2787         (void) snprintf(errbuf, sizeof (errbuf),
2788             dgettext(TEXT_DOMAIN, "cannot create '%s'"), path);
2789
2790         /* get parent, and check to see if this is just a pool */
2791         if (parent_name(path, parent, sizeof (parent)) != 0) {
2792                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
2793                     "missing dataset name"));
2794                 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
2795         }
2796
2797         /* check to see if the pool exists */
2798         if ((slash = strchr(parent, '/')) == NULL)
2799                 slash = parent + strlen(parent);
2800         (void) strncpy(zc.zc_name, parent, slash - parent);
2801         zc.zc_name[slash - parent] = '\0';
2802         if (ioctl(hdl->libzfs_fd, ZFS_IOC_OBJSET_STATS, &zc) != 0 &&
2803             errno == ENOENT) {
2804                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
2805                     "no such pool '%s'"), zc.zc_name);
2806                 return (zfs_error(hdl, EZFS_NOENT, errbuf));
2807         }
2808
2809         /* check to see if the parent dataset exists */
2810         while ((zhp = make_dataset_handle(hdl, parent)) == NULL) {
2811                 if (errno == ENOENT && accept_ancestor) {
2812                         /*
2813                          * Go deeper to find an ancestor, give up on top level.
2814                          */
2815                         if (parent_name(parent, parent, sizeof (parent)) != 0) {
2816                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
2817                                     "no such pool '%s'"), zc.zc_name);
2818                                 return (zfs_error(hdl, EZFS_NOENT, errbuf));
2819                         }
2820                 } else if (errno == ENOENT) {
2821                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
2822                             "parent does not exist"));
2823                         return (zfs_error(hdl, EZFS_NOENT, errbuf));
2824                 } else
2825                         return (zfs_standard_error(hdl, errno, errbuf));
2826         }
2827
2828         is_zoned = zfs_prop_get_int(zhp, ZFS_PROP_ZONED);
2829         if (zoned != NULL)
2830                 *zoned = is_zoned;
2831
2832         /* we are in a non-global zone, but parent is in the global zone */
2833         if (getzoneid() != GLOBAL_ZONEID && !is_zoned) {
2834                 (void) zfs_standard_error(hdl, EPERM, errbuf);
2835                 zfs_close(zhp);
2836                 return (-1);
2837         }
2838
2839         /* make sure parent is a filesystem */
2840         if (zfs_get_type(zhp) != ZFS_TYPE_FILESYSTEM) {
2841                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
2842                     "parent is not a filesystem"));
2843                 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf);
2844                 zfs_close(zhp);
2845                 return (-1);
2846         }
2847
2848         zfs_close(zhp);
2849         if (prefixlen != NULL)
2850                 *prefixlen = strlen(parent);
2851         return (0);
2852 }
2853
2854 /*
2855  * Finds whether the dataset of the given type(s) exists.
2856  */
2857 boolean_t
2858 zfs_dataset_exists(libzfs_handle_t *hdl, const char *path, zfs_type_t types)
2859 {
2860         zfs_handle_t *zhp;
2861
2862         if (!zfs_validate_name(hdl, path, types, B_FALSE))
2863                 return (B_FALSE);
2864
2865         /*
2866          * Try to get stats for the dataset, which will tell us if it exists.
2867          */
2868         if ((zhp = make_dataset_handle(hdl, path)) != NULL) {
2869                 int ds_type = zhp->zfs_type;
2870
2871                 zfs_close(zhp);
2872                 if (types & ds_type)
2873                         return (B_TRUE);
2874         }
2875         return (B_FALSE);
2876 }
2877
2878 /*
2879  * Given a path to 'target', create all the ancestors between
2880  * the prefixlen portion of the path, and the target itself.
2881  * Fail if the initial prefixlen-ancestor does not already exist.
2882  */
2883 int
2884 create_parents(libzfs_handle_t *hdl, char *target, int prefixlen)
2885 {
2886         zfs_handle_t *h;
2887         char *cp;
2888         const char *opname;
2889
2890         /* make sure prefix exists */
2891         cp = target + prefixlen;
2892         if (*cp != '/') {
2893                 assert(strchr(cp, '/') == NULL);
2894                 h = zfs_open(hdl, target, ZFS_TYPE_FILESYSTEM);
2895         } else {
2896                 *cp = '\0';
2897                 h = zfs_open(hdl, target, ZFS_TYPE_FILESYSTEM);
2898                 *cp = '/';
2899         }
2900         if (h == NULL)
2901                 return (-1);
2902         zfs_close(h);
2903
2904         /*
2905          * Attempt to create, mount, and share any ancestor filesystems,
2906          * up to the prefixlen-long one.
2907          */
2908         for (cp = target + prefixlen + 1;
2909             cp = strchr(cp, '/'); *cp = '/', cp++) {
2910
2911                 *cp = '\0';
2912
2913                 h = make_dataset_handle(hdl, target);
2914                 if (h) {
2915                         /* it already exists, nothing to do here */
2916                         zfs_close(h);
2917                         continue;
2918                 }
2919
2920                 if (zfs_create(hdl, target, ZFS_TYPE_FILESYSTEM,
2921                     NULL) != 0) {
2922                         opname = dgettext(TEXT_DOMAIN, "create");
2923                         goto ancestorerr;
2924                 }
2925
2926                 h = zfs_open(hdl, target, ZFS_TYPE_FILESYSTEM);
2927                 if (h == NULL) {
2928                         opname = dgettext(TEXT_DOMAIN, "open");
2929                         goto ancestorerr;
2930                 }
2931
2932                 if (zfs_mount(h, NULL, 0) != 0) {
2933                         opname = dgettext(TEXT_DOMAIN, "mount");
2934                         goto ancestorerr;
2935                 }
2936
2937                 if (zfs_share(h) != 0) {
2938                         opname = dgettext(TEXT_DOMAIN, "share");
2939                         goto ancestorerr;
2940                 }
2941
2942                 zfs_close(h);
2943         }
2944
2945         return (0);
2946
2947 ancestorerr:
2948         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
2949             "failed to %s ancestor '%s'"), opname, target);
2950         return (-1);
2951 }
2952
2953 /*
2954  * Creates non-existing ancestors of the given path.
2955  */
2956 int
2957 zfs_create_ancestors(libzfs_handle_t *hdl, const char *path)
2958 {
2959         int prefix;
2960         char *path_copy;
2961         int rc;
2962
2963         if (check_parents(hdl, path, NULL, B_TRUE, &prefix) != 0)
2964                 return (-1);
2965
2966         if ((path_copy = strdup(path)) != NULL) {
2967                 rc = create_parents(hdl, path_copy, prefix);
2968                 free(path_copy);
2969         }
2970         if (path_copy == NULL || rc != 0)
2971                 return (-1);
2972
2973         return (0);
2974 }
2975
2976 /*
2977  * Create a new filesystem or volume.
2978  */
2979 int
2980 zfs_create(libzfs_handle_t *hdl, const char *path, zfs_type_t type,
2981     nvlist_t *props)
2982 {
2983         int ret;
2984         uint64_t size = 0;
2985         uint64_t blocksize = zfs_prop_default_numeric(ZFS_PROP_VOLBLOCKSIZE);
2986         char errbuf[1024];
2987         uint64_t zoned;
2988         dmu_objset_type_t ost;
2989
2990         (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
2991             "cannot create '%s'"), path);
2992
2993         /* validate the path, taking care to note the extended error message */
2994         if (!zfs_validate_name(hdl, path, type, B_TRUE))
2995                 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
2996
2997         /* validate parents exist */
2998         if (check_parents(hdl, path, &zoned, B_FALSE, NULL) != 0)
2999                 return (-1);
3000
3001         /*
3002          * The failure modes when creating a dataset of a different type over
3003          * one that already exists is a little strange.  In particular, if you
3004          * try to create a dataset on top of an existing dataset, the ioctl()
3005          * will return ENOENT, not EEXIST.  To prevent this from happening, we
3006          * first try to see if the dataset exists.
3007          */
3008         if (zfs_dataset_exists(hdl, path, ZFS_TYPE_DATASET)) {
3009                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3010                     "dataset already exists"));
3011                 return (zfs_error(hdl, EZFS_EXISTS, errbuf));
3012         }
3013
3014         if (type == ZFS_TYPE_VOLUME)
3015                 ost = DMU_OST_ZVOL;
3016         else
3017                 ost = DMU_OST_ZFS;
3018
3019         if (props && (props = zfs_valid_proplist(hdl, type, props,
3020             zoned, NULL, errbuf)) == 0)
3021                 return (-1);
3022
3023         if (type == ZFS_TYPE_VOLUME) {
3024                 /*
3025                  * If we are creating a volume, the size and block size must
3026                  * satisfy a few restraints.  First, the blocksize must be a
3027                  * valid block size between SPA_{MIN,MAX}BLOCKSIZE.  Second, the
3028                  * volsize must be a multiple of the block size, and cannot be
3029                  * zero.
3030                  */
3031                 if (props == NULL || nvlist_lookup_uint64(props,
3032                     zfs_prop_to_name(ZFS_PROP_VOLSIZE), &size) != 0) {
3033                         nvlist_free(props);
3034                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3035                             "missing volume size"));
3036                         return (zfs_error(hdl, EZFS_BADPROP, errbuf));
3037                 }
3038
3039                 if ((ret = nvlist_lookup_uint64(props,
3040                     zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE),
3041                     &blocksize)) != 0) {
3042                         if (ret == ENOENT) {
3043                                 blocksize = zfs_prop_default_numeric(
3044                                     ZFS_PROP_VOLBLOCKSIZE);
3045                         } else {
3046                                 nvlist_free(props);
3047                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3048                                     "missing volume block size"));
3049                                 return (zfs_error(hdl, EZFS_BADPROP, errbuf));
3050                         }
3051                 }
3052
3053                 if (size == 0) {
3054                         nvlist_free(props);
3055                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3056                             "volume size cannot be zero"));
3057                         return (zfs_error(hdl, EZFS_BADPROP, errbuf));
3058                 }
3059
3060                 if (size % blocksize != 0) {
3061                         nvlist_free(props);
3062                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3063                             "volume size must be a multiple of volume block "
3064                             "size"));
3065                         return (zfs_error(hdl, EZFS_BADPROP, errbuf));
3066                 }
3067         }
3068
3069         /* create the dataset */
3070         ret = lzc_create(path, ost, props);
3071         nvlist_free(props);
3072
3073         /* check for failure */
3074         if (ret != 0) {
3075                 char parent[ZFS_MAXNAMELEN];
3076                 (void) parent_name(path, parent, sizeof (parent));
3077
3078                 switch (errno) {
3079                 case ENOENT:
3080                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3081                             "no such parent '%s'"), parent);
3082                         return (zfs_error(hdl, EZFS_NOENT, errbuf));
3083
3084                 case EINVAL:
3085                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3086                             "parent '%s' is not a filesystem"), parent);
3087                         return (zfs_error(hdl, EZFS_BADTYPE, errbuf));
3088
3089                 case EDOM:
3090                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3091                             "volume block size must be power of 2 from "
3092                             "%u to %uk"),
3093                             (uint_t)SPA_MINBLOCKSIZE,
3094                             (uint_t)SPA_MAXBLOCKSIZE >> 10);
3095
3096                         return (zfs_error(hdl, EZFS_BADPROP, errbuf));
3097
3098                 case ENOTSUP:
3099                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3100                             "pool must be upgraded to set this "
3101                             "property or value"));
3102                         return (zfs_error(hdl, EZFS_BADVERSION, errbuf));
3103 #ifdef _ILP32
3104                 case EOVERFLOW:
3105                         /*
3106                          * This platform can't address a volume this big.
3107                          */
3108                         if (type == ZFS_TYPE_VOLUME)
3109                                 return (zfs_error(hdl, EZFS_VOLTOOBIG,
3110                                     errbuf));
3111 #endif
3112                         /* FALLTHROUGH */
3113                 default:
3114                         return (zfs_standard_error(hdl, errno, errbuf));
3115                 }
3116         }
3117
3118         return (0);
3119 }
3120
3121 /*
3122  * Destroys the given dataset.  The caller must make sure that the filesystem
3123  * isn't mounted, and that there are no active dependents. If the file system
3124  * does not exist this function does nothing.
3125  */
3126 int
3127 zfs_destroy(zfs_handle_t *zhp, boolean_t defer)
3128 {
3129         zfs_cmd_t zc = { 0 };
3130
3131         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
3132
3133         if (ZFS_IS_VOLUME(zhp)) {
3134                 zc.zc_objset_type = DMU_OST_ZVOL;
3135         } else {
3136                 zc.zc_objset_type = DMU_OST_ZFS;
3137         }
3138
3139         zc.zc_defer_destroy = defer;
3140         if (zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_DESTROY, &zc) != 0 &&
3141             errno != ENOENT) {
3142                 return (zfs_standard_error_fmt(zhp->zfs_hdl, errno,
3143                     dgettext(TEXT_DOMAIN, "cannot destroy '%s'"),
3144                     zhp->zfs_name));
3145         }
3146
3147         remove_mountpoint(zhp);
3148
3149         return (0);
3150 }
3151
3152 struct destroydata {
3153         nvlist_t *nvl;
3154         const char *snapname;
3155 };
3156
3157 static int
3158 zfs_check_snap_cb(zfs_handle_t *zhp, void *arg)
3159 {
3160         struct destroydata *dd = arg;
3161         zfs_handle_t *szhp;
3162         char name[ZFS_MAXNAMELEN];
3163         int rv = 0;
3164
3165         (void) snprintf(name, sizeof (name),
3166             "%s@%s", zhp->zfs_name, dd->snapname);
3167
3168         szhp = make_dataset_handle(zhp->zfs_hdl, name);
3169         if (szhp) {
3170                 verify(nvlist_add_boolean(dd->nvl, name) == 0);
3171                 zfs_close(szhp);
3172         }
3173
3174         rv = zfs_iter_filesystems(zhp, zfs_check_snap_cb, dd);
3175         zfs_close(zhp);
3176         return (rv);
3177 }
3178
3179 /*
3180  * Destroys all snapshots with the given name in zhp & descendants.
3181  */
3182 int
3183 zfs_destroy_snaps(zfs_handle_t *zhp, char *snapname, boolean_t defer)
3184 {
3185         int ret;
3186         struct destroydata dd = { 0 };
3187
3188         dd.snapname = snapname;
3189         verify(nvlist_alloc(&dd.nvl, NV_UNIQUE_NAME, 0) == 0);
3190         (void) zfs_check_snap_cb(zfs_handle_dup(zhp), &dd);
3191
3192         if (nvlist_next_nvpair(dd.nvl, NULL) == NULL) {
3193                 ret = zfs_standard_error_fmt(zhp->zfs_hdl, ENOENT,
3194                     dgettext(TEXT_DOMAIN, "cannot destroy '%s@%s'"),
3195                     zhp->zfs_name, snapname);
3196         } else {
3197                 ret = zfs_destroy_snaps_nvl(zhp->zfs_hdl, dd.nvl, defer);
3198         }
3199         nvlist_free(dd.nvl);
3200         return (ret);
3201 }
3202
3203 /*
3204  * Destroys all the snapshots named in the nvlist.
3205  */
3206 int
3207 zfs_destroy_snaps_nvl(libzfs_handle_t *hdl, nvlist_t *snaps, boolean_t defer)
3208 {
3209         int ret;
3210         nvlist_t *errlist;
3211
3212         ret = lzc_destroy_snaps(snaps, defer, &errlist);
3213
3214         if (ret == 0)
3215                 return (0);
3216
3217         if (nvlist_next_nvpair(errlist, NULL) == NULL) {
3218                 char errbuf[1024];
3219                 (void) snprintf(errbuf, sizeof (errbuf),
3220                     dgettext(TEXT_DOMAIN, "cannot destroy snapshots"));
3221
3222                 ret = zfs_standard_error(hdl, ret, errbuf);
3223         }
3224         for (nvpair_t *pair = nvlist_next_nvpair(errlist, NULL);
3225             pair != NULL; pair = nvlist_next_nvpair(errlist, pair)) {
3226                 char errbuf[1024];
3227                 (void) snprintf(errbuf, sizeof (errbuf),
3228                     dgettext(TEXT_DOMAIN, "cannot destroy snapshot %s"),
3229                     nvpair_name(pair));
3230
3231                 switch (fnvpair_value_int32(pair)) {
3232                 case EEXIST:
3233                         zfs_error_aux(hdl,
3234                             dgettext(TEXT_DOMAIN, "snapshot is cloned"));
3235                         ret = zfs_error(hdl, EZFS_EXISTS, errbuf);
3236                         break;
3237                 default:
3238                         ret = zfs_standard_error(hdl, errno, errbuf);
3239                         break;
3240                 }
3241         }
3242
3243         return (ret);
3244 }
3245
3246 /*
3247  * Clones the given dataset.  The target must be of the same type as the source.
3248  */
3249 int
3250 zfs_clone(zfs_handle_t *zhp, const char *target, nvlist_t *props)
3251 {
3252         char parent[ZFS_MAXNAMELEN];
3253         int ret;
3254         char errbuf[1024];
3255         libzfs_handle_t *hdl = zhp->zfs_hdl;
3256         uint64_t zoned;
3257
3258         assert(zhp->zfs_type == ZFS_TYPE_SNAPSHOT);
3259
3260         (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3261             "cannot create '%s'"), target);
3262
3263         /* validate the target/clone name */
3264         if (!zfs_validate_name(hdl, target, ZFS_TYPE_FILESYSTEM, B_TRUE))
3265                 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3266
3267         /* validate parents exist */
3268         if (check_parents(hdl, target, &zoned, B_FALSE, NULL) != 0)
3269                 return (-1);
3270
3271         (void) parent_name(target, parent, sizeof (parent));
3272
3273         /* do the clone */
3274
3275         if (props) {
3276                 zfs_type_t type;
3277                 if (ZFS_IS_VOLUME(zhp)) {
3278                         type = ZFS_TYPE_VOLUME;
3279                 } else {
3280                         type = ZFS_TYPE_FILESYSTEM;
3281                 }
3282                 if ((props = zfs_valid_proplist(hdl, type, props, zoned,
3283                     zhp, errbuf)) == NULL)
3284                         return (-1);
3285         }
3286
3287         ret = lzc_clone(target, zhp->zfs_name, props);
3288         nvlist_free(props);
3289
3290         if (ret != 0) {
3291                 switch (errno) {
3292
3293                 case ENOENT:
3294                         /*
3295                          * The parent doesn't exist.  We should have caught this
3296                          * above, but there may a race condition that has since
3297                          * destroyed the parent.
3298                          *
3299                          * At this point, we don't know whether it's the source
3300                          * that doesn't exist anymore, or whether the target
3301                          * dataset doesn't exist.
3302                          */
3303                         zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN,
3304                             "no such parent '%s'"), parent);
3305                         return (zfs_error(zhp->zfs_hdl, EZFS_NOENT, errbuf));
3306
3307                 case EXDEV:
3308                         zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN,
3309                             "source and target pools differ"));
3310                         return (zfs_error(zhp->zfs_hdl, EZFS_CROSSTARGET,
3311                             errbuf));
3312
3313                 default:
3314                         return (zfs_standard_error(zhp->zfs_hdl, errno,
3315                             errbuf));
3316                 }
3317         }
3318
3319         return (ret);
3320 }
3321
3322 /*
3323  * Promotes the given clone fs to be the clone parent.
3324  */
3325 int
3326 zfs_promote(zfs_handle_t *zhp)
3327 {
3328         libzfs_handle_t *hdl = zhp->zfs_hdl;
3329         zfs_cmd_t zc = { 0 };
3330         char parent[MAXPATHLEN];
3331         int ret;
3332         char errbuf[1024];
3333
3334         (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3335             "cannot promote '%s'"), zhp->zfs_name);
3336
3337         if (zhp->zfs_type == ZFS_TYPE_SNAPSHOT) {
3338                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3339                     "snapshots can not be promoted"));
3340                 return (zfs_error(hdl, EZFS_BADTYPE, errbuf));
3341         }
3342
3343         (void) strlcpy(parent, zhp->zfs_dmustats.dds_origin, sizeof (parent));
3344         if (parent[0] == '\0') {
3345                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3346                     "not a cloned filesystem"));
3347                 return (zfs_error(hdl, EZFS_BADTYPE, errbuf));
3348         }
3349
3350         (void) strlcpy(zc.zc_value, zhp->zfs_dmustats.dds_origin,
3351             sizeof (zc.zc_value));
3352         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
3353         ret = zfs_ioctl(hdl, ZFS_IOC_PROMOTE, &zc);
3354
3355         if (ret != 0) {
3356                 int save_errno = errno;
3357
3358                 switch (save_errno) {
3359                 case EEXIST:
3360                         /* There is a conflicting snapshot name. */
3361                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3362                             "conflicting snapshot '%s' from parent '%s'"),
3363                             zc.zc_string, parent);
3364                         return (zfs_error(hdl, EZFS_EXISTS, errbuf));
3365
3366                 default:
3367                         return (zfs_standard_error(hdl, save_errno, errbuf));
3368                 }
3369         }
3370         return (ret);
3371 }
3372
3373 typedef struct snapdata {
3374         nvlist_t *sd_nvl;
3375         const char *sd_snapname;
3376 } snapdata_t;
3377
3378 static int
3379 zfs_snapshot_cb(zfs_handle_t *zhp, void *arg)
3380 {
3381         snapdata_t *sd = arg;
3382         char name[ZFS_MAXNAMELEN];
3383         int rv = 0;
3384
3385         (void) snprintf(name, sizeof (name),
3386             "%s@%s", zfs_get_name(zhp), sd->sd_snapname);
3387
3388         fnvlist_add_boolean(sd->sd_nvl, name);
3389
3390         rv = zfs_iter_filesystems(zhp, zfs_snapshot_cb, sd);
3391         zfs_close(zhp);
3392         return (rv);
3393 }
3394
3395 /*
3396  * Creates snapshots.  The keys in the snaps nvlist are the snapshots to be
3397  * created.
3398  */
3399 int
3400 zfs_snapshot_nvl(libzfs_handle_t *hdl, nvlist_t *snaps, nvlist_t *props)
3401 {
3402         int ret;
3403         char errbuf[1024];
3404         nvpair_t *elem;
3405         nvlist_t *errors;
3406
3407         (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3408             "cannot create snapshots "));
3409
3410         elem = NULL;
3411         while ((elem = nvlist_next_nvpair(snaps, elem)) != NULL) {
3412                 const char *snapname = nvpair_name(elem);
3413
3414                 /* validate the target name */
3415                 if (!zfs_validate_name(hdl, snapname, ZFS_TYPE_SNAPSHOT,
3416                     B_TRUE)) {
3417                         (void) snprintf(errbuf, sizeof (errbuf),
3418                             dgettext(TEXT_DOMAIN,
3419                             "cannot create snapshot '%s'"), snapname);
3420                         return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3421                 }
3422         }
3423
3424         if (props != NULL &&
3425             (props = zfs_valid_proplist(hdl, ZFS_TYPE_SNAPSHOT,
3426             props, B_FALSE, NULL, errbuf)) == NULL) {
3427                 return (-1);
3428         }
3429
3430         ret = lzc_snapshot(snaps, props, &errors);
3431
3432         if (ret != 0) {
3433                 boolean_t printed = B_FALSE;
3434                 for (elem = nvlist_next_nvpair(errors, NULL);
3435                     elem != NULL;
3436                     elem = nvlist_next_nvpair(errors, elem)) {
3437                         (void) snprintf(errbuf, sizeof (errbuf),
3438                             dgettext(TEXT_DOMAIN,
3439                             "cannot create snapshot '%s'"), nvpair_name(elem));
3440                         (void) zfs_standard_error(hdl,
3441                             fnvpair_value_int32(elem), errbuf);
3442                         printed = B_TRUE;
3443                 }
3444                 if (!printed) {
3445                         switch (ret) {
3446                         case EXDEV:
3447                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3448                                     "multiple snapshots of same "
3449                                     "fs not allowed"));
3450                                 (void) zfs_error(hdl, EZFS_EXISTS, errbuf);
3451
3452                                 break;
3453                         default:
3454                                 (void) zfs_standard_error(hdl, ret, errbuf);
3455                         }
3456                 }
3457         }
3458
3459         nvlist_free(props);
3460         nvlist_free(errors);
3461         return (ret);
3462 }
3463
3464 int
3465 zfs_snapshot(libzfs_handle_t *hdl, const char *path, boolean_t recursive,
3466     nvlist_t *props)
3467 {
3468         int ret;
3469         snapdata_t sd = { 0 };
3470         char fsname[ZFS_MAXNAMELEN];
3471         char *cp;
3472         zfs_handle_t *zhp;
3473         char errbuf[1024];
3474
3475         (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3476             "cannot snapshot %s"), path);
3477
3478         if (!zfs_validate_name(hdl, path, ZFS_TYPE_SNAPSHOT, B_TRUE))
3479                 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3480
3481         (void) strlcpy(fsname, path, sizeof (fsname));
3482         cp = strchr(fsname, '@');
3483         *cp = '\0';
3484         sd.sd_snapname = cp + 1;
3485
3486         if ((zhp = zfs_open(hdl, fsname, ZFS_TYPE_FILESYSTEM |
3487             ZFS_TYPE_VOLUME)) == NULL) {
3488                 return (-1);
3489         }
3490
3491         verify(nvlist_alloc(&sd.sd_nvl, NV_UNIQUE_NAME, 0) == 0);
3492         if (recursive) {
3493                 (void) zfs_snapshot_cb(zfs_handle_dup(zhp), &sd);
3494         } else {
3495                 fnvlist_add_boolean(sd.sd_nvl, path);
3496         }
3497
3498         ret = zfs_snapshot_nvl(hdl, sd.sd_nvl, props);
3499         nvlist_free(sd.sd_nvl);
3500         zfs_close(zhp);
3501         return (ret);
3502 }
3503
3504 /*
3505  * Destroy any more recent snapshots.  We invoke this callback on any dependents
3506  * of the snapshot first.  If the 'cb_dependent' member is non-zero, then this
3507  * is a dependent and we should just destroy it without checking the transaction
3508  * group.
3509  */
3510 typedef struct rollback_data {
3511         const char      *cb_target;             /* the snapshot */
3512         uint64_t        cb_create;              /* creation time reference */
3513         boolean_t       cb_error;
3514         boolean_t       cb_dependent;
3515         boolean_t       cb_force;
3516 } rollback_data_t;
3517
3518 static int
3519 rollback_destroy(zfs_handle_t *zhp, void *data)
3520 {
3521         rollback_data_t *cbp = data;
3522
3523         if (!cbp->cb_dependent) {
3524                 if (strcmp(zhp->zfs_name, cbp->cb_target) != 0 &&
3525                     zfs_get_type(zhp) == ZFS_TYPE_SNAPSHOT &&
3526                     zfs_prop_get_int(zhp, ZFS_PROP_CREATETXG) >
3527                     cbp->cb_create) {
3528
3529                         cbp->cb_dependent = B_TRUE;
3530                         cbp->cb_error |= zfs_iter_dependents(zhp, B_FALSE,
3531                             rollback_destroy, cbp);
3532                         cbp->cb_dependent = B_FALSE;
3533
3534                         cbp->cb_error |= zfs_destroy(zhp, B_FALSE);
3535                 }
3536         } else {
3537                 /* We must destroy this clone; first unmount it */
3538                 prop_changelist_t *clp;
3539
3540                 clp = changelist_gather(zhp, ZFS_PROP_NAME, 0,
3541                     cbp->cb_force ? MS_FORCE: 0);
3542                 if (clp == NULL || changelist_prefix(clp) != 0) {
3543                         cbp->cb_error = B_TRUE;
3544                         zfs_close(zhp);
3545                         return (0);
3546                 }
3547                 if (zfs_destroy(zhp, B_FALSE) != 0)
3548                         cbp->cb_error = B_TRUE;
3549                 else
3550                         changelist_remove(clp, zhp->zfs_name);
3551                 (void) changelist_postfix(clp);
3552                 changelist_free(clp);
3553         }
3554
3555         zfs_close(zhp);
3556         return (0);
3557 }
3558
3559 /*
3560  * Given a dataset, rollback to a specific snapshot, discarding any
3561  * data changes since then and making it the active dataset.
3562  *
3563  * Any snapshots more recent than the target are destroyed, along with
3564  * their dependents.
3565  */
3566 int
3567 zfs_rollback(zfs_handle_t *zhp, zfs_handle_t *snap, boolean_t force)
3568 {
3569         rollback_data_t cb = { 0 };
3570         int err;
3571         zfs_cmd_t zc = { 0 };
3572         boolean_t restore_resv = 0;
3573         uint64_t old_volsize, new_volsize;
3574         zfs_prop_t resv_prop;
3575
3576         assert(zhp->zfs_type == ZFS_TYPE_FILESYSTEM ||
3577             zhp->zfs_type == ZFS_TYPE_VOLUME);
3578
3579         /*
3580          * Destroy all recent snapshots and their dependents.
3581          */
3582         cb.cb_force = force;
3583         cb.cb_target = snap->zfs_name;
3584         cb.cb_create = zfs_prop_get_int(snap, ZFS_PROP_CREATETXG);
3585         (void) zfs_iter_children(zhp, rollback_destroy, &cb);
3586
3587         if (cb.cb_error)
3588                 return (-1);
3589
3590         /*
3591          * Now that we have verified that the snapshot is the latest,
3592          * rollback to the given snapshot.
3593          */
3594
3595         if (zhp->zfs_type == ZFS_TYPE_VOLUME) {
3596                 if (zfs_which_resv_prop(zhp, &resv_prop) < 0)
3597                         return (-1);
3598                 old_volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE);
3599                 restore_resv =
3600                     (old_volsize == zfs_prop_get_int(zhp, resv_prop));
3601         }
3602
3603         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
3604
3605         if (ZFS_IS_VOLUME(zhp))
3606                 zc.zc_objset_type = DMU_OST_ZVOL;
3607         else
3608                 zc.zc_objset_type = DMU_OST_ZFS;
3609
3610         /*
3611          * We rely on zfs_iter_children() to verify that there are no
3612          * newer snapshots for the given dataset.  Therefore, we can
3613          * simply pass the name on to the ioctl() call.  There is still
3614          * an unlikely race condition where the user has taken a
3615          * snapshot since we verified that this was the most recent.
3616          *
3617          */
3618         if ((err = zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_ROLLBACK, &zc)) != 0) {
3619                 (void) zfs_standard_error_fmt(zhp->zfs_hdl, errno,
3620                     dgettext(TEXT_DOMAIN, "cannot rollback '%s'"),
3621                     zhp->zfs_name);
3622                 return (err);
3623         }
3624
3625         /*
3626          * For volumes, if the pre-rollback volsize matched the pre-
3627          * rollback reservation and the volsize has changed then set
3628          * the reservation property to the post-rollback volsize.
3629          * Make a new handle since the rollback closed the dataset.
3630          */
3631         if ((zhp->zfs_type == ZFS_TYPE_VOLUME) &&
3632             (zhp = make_dataset_handle(zhp->zfs_hdl, zhp->zfs_name))) {
3633                 if (restore_resv) {
3634                         new_volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE);
3635                         if (old_volsize != new_volsize)
3636                                 err = zfs_prop_set_int(zhp, resv_prop,
3637                                     new_volsize);
3638                 }
3639                 zfs_close(zhp);
3640         }
3641         return (err);
3642 }
3643
3644 /*
3645  * Renames the given dataset.
3646  */
3647 int
3648 zfs_rename(zfs_handle_t *zhp, const char *source, const char *target,
3649     renameflags_t flags)
3650 {
3651         int ret;
3652         zfs_cmd_t zc = { 0 };
3653         char *delim;
3654         prop_changelist_t *cl = NULL;
3655         zfs_handle_t *zhrp = NULL;
3656         char *parentname = NULL;
3657         char parent[ZFS_MAXNAMELEN];
3658         char property[ZFS_MAXPROPLEN];
3659         libzfs_handle_t *hdl = zhp->zfs_hdl;
3660         char errbuf[1024];
3661
3662         /* if we have the same exact name, just return success */
3663         if (strcmp(zhp->zfs_name, target) == 0)
3664                 return (0);
3665
3666         (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3667             "cannot rename to '%s'"), target);
3668
3669         if (source != NULL) {
3670                 /*
3671                  * This is recursive snapshots rename, put snapshot name
3672                  * (that might not exist) into zfs_name.
3673                  */
3674                 assert(flags.recurse);
3675
3676                 (void) strlcat(zhp->zfs_name, "@", sizeof(zhp->zfs_name));
3677                 (void) strlcat(zhp->zfs_name, source, sizeof(zhp->zfs_name));
3678                 zhp->zfs_type = ZFS_TYPE_SNAPSHOT;
3679         }
3680
3681         /*
3682          * Make sure the target name is valid
3683          */
3684         if (zhp->zfs_type == ZFS_TYPE_SNAPSHOT) {
3685                 if ((strchr(target, '@') == NULL) ||
3686                     *target == '@') {
3687                         /*
3688                          * Snapshot target name is abbreviated,
3689                          * reconstruct full dataset name
3690                          */
3691                         (void) strlcpy(parent, zhp->zfs_name,
3692                             sizeof (parent));
3693                         delim = strchr(parent, '@');
3694                         if (strchr(target, '@') == NULL)
3695                                 *(++delim) = '\0';
3696                         else
3697                                 *delim = '\0';
3698                         (void) strlcat(parent, target, sizeof (parent));
3699                         target = parent;
3700                 } else {
3701                         /*
3702                          * Make sure we're renaming within the same dataset.
3703                          */
3704                         delim = strchr(target, '@');
3705                         if (strncmp(zhp->zfs_name, target, delim - target)
3706                             != 0 || zhp->zfs_name[delim - target] != '@') {
3707                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3708                                     "snapshots must be part of same "
3709                                     "dataset"));
3710                                 return (zfs_error(hdl, EZFS_CROSSTARGET,
3711                                     errbuf));
3712                         }
3713                 }
3714                 if (!zfs_validate_name(hdl, target, zhp->zfs_type, B_TRUE))
3715                         return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3716         } else {
3717                 if (flags.recurse) {
3718                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3719                             "recursive rename must be a snapshot"));
3720                         return (zfs_error(hdl, EZFS_BADTYPE, errbuf));
3721                 }
3722
3723                 if (!zfs_validate_name(hdl, target, zhp->zfs_type, B_TRUE))
3724                         return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3725
3726                 /* validate parents */
3727                 if (check_parents(hdl, target, NULL, B_FALSE, NULL) != 0)
3728                         return (-1);
3729
3730                 /* make sure we're in the same pool */
3731                 verify((delim = strchr(target, '/')) != NULL);
3732                 if (strncmp(zhp->zfs_name, target, delim - target) != 0 ||
3733                     zhp->zfs_name[delim - target] != '/') {
3734                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3735                             "datasets must be within same pool"));
3736                         return (zfs_error(hdl, EZFS_CROSSTARGET, errbuf));
3737                 }
3738
3739                 /* new name cannot be a child of the current dataset name */
3740                 if (is_descendant(zhp->zfs_name, target)) {
3741                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3742                             "New dataset name cannot be a descendant of "
3743                             "current dataset name"));
3744                         return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3745                 }
3746         }
3747
3748         (void) snprintf(errbuf, sizeof (errbuf),
3749             dgettext(TEXT_DOMAIN, "cannot rename '%s'"), zhp->zfs_name);
3750
3751         if (getzoneid() == GLOBAL_ZONEID &&
3752             zfs_prop_get_int(zhp, ZFS_PROP_ZONED)) {
3753                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3754                     "dataset is used in a non-global zone"));
3755                 return (zfs_error(hdl, EZFS_ZONED, errbuf));
3756         }
3757
3758         /*
3759          * Avoid unmounting file systems with mountpoint property set to
3760          * 'legacy' or 'none' even if -u option is not given.
3761          */
3762         if (zhp->zfs_type == ZFS_TYPE_FILESYSTEM &&
3763             !flags.recurse && !flags.nounmount &&
3764             zfs_prop_get(zhp, ZFS_PROP_MOUNTPOINT, property,
3765             sizeof (property), NULL, NULL, 0, B_FALSE) == 0 &&
3766             (strcmp(property, "legacy") == 0 ||
3767              strcmp(property, "none") == 0)) {
3768                 flags.nounmount = B_TRUE;
3769         }
3770
3771         if (flags.recurse) {
3772
3773                 parentname = zfs_strdup(zhp->zfs_hdl, zhp->zfs_name);
3774                 if (parentname == NULL) {
3775                         ret = -1;
3776                         goto error;
3777                 }
3778                 delim = strchr(parentname, '@');
3779                 *delim = '\0';
3780                 zhrp = zfs_open(zhp->zfs_hdl, parentname, ZFS_TYPE_DATASET);
3781                 if (zhrp == NULL) {
3782                         ret = -1;
3783                         goto error;
3784                 }
3785
3786         } else {
3787                 if ((cl = changelist_gather(zhp, ZFS_PROP_NAME,
3788                     flags.nounmount ? CL_GATHER_DONT_UNMOUNT : 0,
3789                     flags.forceunmount ? MS_FORCE : 0)) == NULL) {
3790                         return (-1);
3791                 }
3792
3793                 if (changelist_haszonedchild(cl)) {
3794                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3795                             "child dataset with inherited mountpoint is used "
3796                             "in a non-global zone"));
3797                         (void) zfs_error(hdl, EZFS_ZONED, errbuf);
3798                         goto error;
3799                 }
3800
3801                 if ((ret = changelist_prefix(cl)) != 0)
3802                         goto error;
3803         }
3804
3805         if (ZFS_IS_VOLUME(zhp))
3806                 zc.zc_objset_type = DMU_OST_ZVOL;
3807         else
3808                 zc.zc_objset_type = DMU_OST_ZFS;
3809
3810         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
3811         (void) strlcpy(zc.zc_value, target, sizeof (zc.zc_value));
3812
3813         zc.zc_cookie = flags.recurse ? 1 : 0;
3814         if (flags.nounmount)
3815                 zc.zc_cookie |= 2;
3816
3817         if ((ret = zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_RENAME, &zc)) != 0) {
3818                 /*
3819                  * if it was recursive, the one that actually failed will
3820                  * be in zc.zc_name
3821                  */
3822                 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3823                     "cannot rename '%s'"), zc.zc_name);
3824
3825                 if (flags.recurse && errno == EEXIST) {
3826                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3827                             "a child dataset already has a snapshot "
3828                             "with the new name"));
3829                         (void) zfs_error(hdl, EZFS_EXISTS, errbuf);
3830                 } else {
3831                         (void) zfs_standard_error(zhp->zfs_hdl, errno, errbuf);
3832                 }
3833
3834                 /*
3835                  * On failure, we still want to remount any filesystems that
3836                  * were previously mounted, so we don't alter the system state.
3837                  */
3838                 if (!flags.recurse)
3839                         (void) changelist_postfix(cl);
3840         } else {
3841                 if (!flags.recurse) {
3842                         changelist_rename(cl, zfs_get_name(zhp), target);
3843                         ret = changelist_postfix(cl);
3844                 }
3845         }
3846
3847 error:
3848         if (parentname) {
3849                 free(parentname);
3850         }
3851         if (zhrp) {
3852                 zfs_close(zhrp);
3853         }
3854         if (cl) {
3855                 changelist_free(cl);
3856         }
3857         return (ret);
3858 }
3859
3860 nvlist_t *
3861 zfs_get_user_props(zfs_handle_t *zhp)
3862 {
3863         return (zhp->zfs_user_props);
3864 }
3865
3866 nvlist_t *
3867 zfs_get_recvd_props(zfs_handle_t *zhp)
3868 {
3869         if (zhp->zfs_recvd_props == NULL)
3870                 if (get_recvd_props_ioctl(zhp) != 0)
3871                         return (NULL);
3872         return (zhp->zfs_recvd_props);
3873 }
3874
3875 /*
3876  * This function is used by 'zfs list' to determine the exact set of columns to
3877  * display, and their maximum widths.  This does two main things:
3878  *
3879  *      - If this is a list of all properties, then expand the list to include
3880  *        all native properties, and set a flag so that for each dataset we look
3881  *        for new unique user properties and add them to the list.
3882  *
3883  *      - For non fixed-width properties, keep track of the maximum width seen
3884  *        so that we can size the column appropriately. If the user has
3885  *        requested received property values, we also need to compute the width
3886  *        of the RECEIVED column.
3887  */
3888 int
3889 zfs_expand_proplist(zfs_handle_t *zhp, zprop_list_t **plp, boolean_t received)
3890 {
3891         libzfs_handle_t *hdl = zhp->zfs_hdl;
3892         zprop_list_t *entry;
3893         zprop_list_t **last, **start;
3894         nvlist_t *userprops, *propval;
3895         nvpair_t *elem;
3896         char *strval;
3897         char buf[ZFS_MAXPROPLEN];
3898
3899         if (zprop_expand_list(hdl, plp, ZFS_TYPE_DATASET) != 0)
3900                 return (-1);
3901
3902         userprops = zfs_get_user_props(zhp);
3903
3904         entry = *plp;
3905         if (entry->pl_all && nvlist_next_nvpair(userprops, NULL) != NULL) {
3906                 /*
3907                  * Go through and add any user properties as necessary.  We
3908                  * start by incrementing our list pointer to the first
3909                  * non-native property.
3910                  */
3911                 start = plp;
3912                 while (*start != NULL) {
3913                         if ((*start)->pl_prop == ZPROP_INVAL)
3914                                 break;
3915                         start = &(*start)->pl_next;
3916                 }
3917
3918                 elem = NULL;
3919                 while ((elem = nvlist_next_nvpair(userprops, elem)) != NULL) {
3920                         /*
3921                          * See if we've already found this property in our list.
3922                          */
3923                         for (last = start; *last != NULL;
3924                             last = &(*last)->pl_next) {
3925                                 if (strcmp((*last)->pl_user_prop,
3926                                     nvpair_name(elem)) == 0)
3927                                         break;
3928                         }
3929
3930                         if (*last == NULL) {
3931                                 if ((entry = zfs_alloc(hdl,
3932                                     sizeof (zprop_list_t))) == NULL ||
3933                                     ((entry->pl_user_prop = zfs_strdup(hdl,
3934                                     nvpair_name(elem)))) == NULL) {
3935                                         free(entry);
3936                                         return (-1);
3937                                 }
3938
3939                                 entry->pl_prop = ZPROP_INVAL;
3940                                 entry->pl_width = strlen(nvpair_name(elem));
3941                                 entry->pl_all = B_TRUE;
3942                                 *last = entry;
3943                         }
3944                 }
3945         }
3946
3947         /*
3948          * Now go through and check the width of any non-fixed columns
3949          */
3950         for (entry = *plp; entry != NULL; entry = entry->pl_next) {
3951                 if (entry->pl_fixed)
3952                         continue;
3953
3954                 if (entry->pl_prop != ZPROP_INVAL) {
3955                         if (zfs_prop_get(zhp, entry->pl_prop,
3956                             buf, sizeof (buf), NULL, NULL, 0, B_FALSE) == 0) {
3957                                 if (strlen(buf) > entry->pl_width)
3958                                         entry->pl_width = strlen(buf);
3959                         }
3960                         if (received && zfs_prop_get_recvd(zhp,
3961                             zfs_prop_to_name(entry->pl_prop),
3962                             buf, sizeof (buf), B_FALSE) == 0)
3963                                 if (strlen(buf) > entry->pl_recvd_width)
3964                                         entry->pl_recvd_width = strlen(buf);
3965                 } else {
3966                         if (nvlist_lookup_nvlist(userprops, entry->pl_user_prop,
3967                             &propval) == 0) {
3968                                 verify(nvlist_lookup_string(propval,
3969                                     ZPROP_VALUE, &strval) == 0);
3970                                 if (strlen(strval) > entry->pl_width)
3971                                         entry->pl_width = strlen(strval);
3972                         }
3973                         if (received && zfs_prop_get_recvd(zhp,
3974                             entry->pl_user_prop,
3975                             buf, sizeof (buf), B_FALSE) == 0)
3976                                 if (strlen(buf) > entry->pl_recvd_width)
3977                                         entry->pl_recvd_width = strlen(buf);
3978                 }
3979         }
3980
3981         return (0);
3982 }
3983
3984 int
3985 zfs_deleg_share_nfs(libzfs_handle_t *hdl, char *dataset, char *path,
3986     char *resource, void *export, void *sharetab,
3987     int sharemax, zfs_share_op_t operation)
3988 {
3989         zfs_cmd_t zc = { 0 };
3990         int error;
3991
3992         (void) strlcpy(zc.zc_name, dataset, sizeof (zc.zc_name));
3993         (void) strlcpy(zc.zc_value, path, sizeof (zc.zc_value));
3994         if (resource)
3995                 (void) strlcpy(zc.zc_string, resource, sizeof (zc.zc_string));
3996         zc.zc_share.z_sharedata = (uint64_t)(uintptr_t)sharetab;
3997         zc.zc_share.z_exportdata = (uint64_t)(uintptr_t)export;
3998         zc.zc_share.z_sharetype = operation;
3999         zc.zc_share.z_sharemax = sharemax;
4000         error = ioctl(hdl->libzfs_fd, ZFS_IOC_SHARE, &zc);
4001         return (error);
4002 }
4003
4004 void
4005 zfs_prune_proplist(zfs_handle_t *zhp, uint8_t *props)
4006 {
4007         nvpair_t *curr;
4008
4009         /*
4010          * Keep a reference to the props-table against which we prune the
4011          * properties.
4012          */
4013         zhp->zfs_props_table = props;
4014
4015         curr = nvlist_next_nvpair(zhp->zfs_props, NULL);
4016
4017         while (curr) {
4018                 zfs_prop_t zfs_prop = zfs_name_to_prop(nvpair_name(curr));
4019                 nvpair_t *next = nvlist_next_nvpair(zhp->zfs_props, curr);
4020
4021                 /*
4022                  * User properties will result in ZPROP_INVAL, and since we
4023                  * only know how to prune standard ZFS properties, we always
4024                  * leave these in the list.  This can also happen if we
4025                  * encounter an unknown DSL property (when running older
4026                  * software, for example).
4027                  */
4028                 if (zfs_prop != ZPROP_INVAL && props[zfs_prop] == B_FALSE)
4029                         (void) nvlist_remove(zhp->zfs_props,
4030                             nvpair_name(curr), nvpair_type(curr));
4031                 curr = next;
4032         }
4033 }
4034
4035 #ifdef sun
4036 static int
4037 zfs_smb_acl_mgmt(libzfs_handle_t *hdl, char *dataset, char *path,
4038     zfs_smb_acl_op_t cmd, char *resource1, char *resource2)
4039 {
4040         zfs_cmd_t zc = { 0 };
4041         nvlist_t *nvlist = NULL;
4042         int error;
4043
4044         (void) strlcpy(zc.zc_name, dataset, sizeof (zc.zc_name));
4045         (void) strlcpy(zc.zc_value, path, sizeof (zc.zc_value));
4046         zc.zc_cookie = (uint64_t)cmd;
4047
4048         if (cmd == ZFS_SMB_ACL_RENAME) {
4049                 if (nvlist_alloc(&nvlist, NV_UNIQUE_NAME, 0) != 0) {
4050                         (void) no_memory(hdl);
4051                         return (NULL);
4052                 }
4053         }
4054
4055         switch (cmd) {
4056         case ZFS_SMB_ACL_ADD:
4057         case ZFS_SMB_ACL_REMOVE:
4058                 (void) strlcpy(zc.zc_string, resource1, sizeof (zc.zc_string));
4059                 break;
4060         case ZFS_SMB_ACL_RENAME:
4061                 if (nvlist_add_string(nvlist, ZFS_SMB_ACL_SRC,
4062                     resource1) != 0) {
4063                                 (void) no_memory(hdl);
4064                                 return (-1);
4065                 }
4066                 if (nvlist_add_string(nvlist, ZFS_SMB_ACL_TARGET,
4067                     resource2) != 0) {
4068                                 (void) no_memory(hdl);
4069                                 return (-1);
4070                 }
4071                 if (zcmd_write_src_nvlist(hdl, &zc, nvlist) != 0) {
4072                         nvlist_free(nvlist);
4073                         return (-1);
4074                 }
4075                 break;
4076         case ZFS_SMB_ACL_PURGE:
4077                 break;
4078         default:
4079                 return (-1);
4080         }
4081         error = ioctl(hdl->libzfs_fd, ZFS_IOC_SMB_ACL, &zc);
4082         if (nvlist)
4083                 nvlist_free(nvlist);
4084         return (error);
4085 }
4086
4087 int
4088 zfs_smb_acl_add(libzfs_handle_t *hdl, char *dataset,
4089     char *path, char *resource)
4090 {
4091         return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_ADD,
4092             resource, NULL));
4093 }
4094
4095 int
4096 zfs_smb_acl_remove(libzfs_handle_t *hdl, char *dataset,
4097     char *path, char *resource)
4098 {
4099         return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_REMOVE,
4100             resource, NULL));
4101 }
4102
4103 int
4104 zfs_smb_acl_purge(libzfs_handle_t *hdl, char *dataset, char *path)
4105 {
4106         return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_PURGE,
4107             NULL, NULL));
4108 }
4109
4110 int
4111 zfs_smb_acl_rename(libzfs_handle_t *hdl, char *dataset, char *path,
4112     char *oldname, char *newname)
4113 {
4114         return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_RENAME,
4115             oldname, newname));
4116 }
4117 #endif  /* sun */
4118
4119 int
4120 zfs_userspace(zfs_handle_t *zhp, zfs_userquota_prop_t type,
4121     zfs_userspace_cb_t func, void *arg)
4122 {
4123         zfs_cmd_t zc = { 0 };
4124         zfs_useracct_t buf[100];
4125         libzfs_handle_t *hdl = zhp->zfs_hdl;
4126         int ret;
4127
4128         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
4129
4130         zc.zc_objset_type = type;
4131         zc.zc_nvlist_dst = (uintptr_t)buf;
4132
4133         for (;;) {
4134                 zfs_useracct_t *zua = buf;
4135
4136                 zc.zc_nvlist_dst_size = sizeof (buf);
4137                 if (zfs_ioctl(hdl, ZFS_IOC_USERSPACE_MANY, &zc) != 0) {
4138                         char errbuf[1024];
4139
4140                         (void) snprintf(errbuf, sizeof (errbuf),
4141                             dgettext(TEXT_DOMAIN,
4142                             "cannot get used/quota for %s"), zc.zc_name);
4143                         return (zfs_standard_error_fmt(hdl, errno, errbuf));
4144                 }
4145                 if (zc.zc_nvlist_dst_size == 0)
4146                         break;
4147
4148                 while (zc.zc_nvlist_dst_size > 0) {
4149                         if ((ret = func(arg, zua->zu_domain, zua->zu_rid,
4150                             zua->zu_space)) != 0)
4151                                 return (ret);
4152                         zua++;
4153                         zc.zc_nvlist_dst_size -= sizeof (zfs_useracct_t);
4154                 }
4155         }
4156
4157         return (0);
4158 }
4159
4160 struct holdarg {
4161         nvlist_t *nvl;
4162         const char *snapname;
4163         const char *tag;
4164         boolean_t recursive;
4165 };
4166
4167 static int
4168 zfs_hold_one(zfs_handle_t *zhp, void *arg)
4169 {
4170         struct holdarg *ha = arg;
4171         zfs_handle_t *szhp;
4172         char name[ZFS_MAXNAMELEN];
4173         int rv = 0;
4174
4175         (void) snprintf(name, sizeof (name),
4176             "%s@%s", zhp->zfs_name, ha->snapname);
4177
4178         szhp = make_dataset_handle(zhp->zfs_hdl, name);
4179         if (szhp) {
4180                 fnvlist_add_string(ha->nvl, name, ha->tag);
4181                 zfs_close(szhp);
4182         }
4183
4184         if (ha->recursive)
4185                 rv = zfs_iter_filesystems(zhp, zfs_hold_one, ha);
4186         zfs_close(zhp);
4187         return (rv);
4188 }
4189
4190 int
4191 zfs_hold(zfs_handle_t *zhp, const char *snapname, const char *tag,
4192     boolean_t recursive, boolean_t enoent_ok, int cleanup_fd)
4193 {
4194         int ret;
4195         struct holdarg ha;
4196         nvlist_t *errors;
4197         libzfs_handle_t *hdl = zhp->zfs_hdl;
4198         char errbuf[1024];
4199         nvpair_t *elem;
4200
4201         ha.nvl = fnvlist_alloc();
4202         ha.snapname = snapname;
4203         ha.tag = tag;
4204         ha.recursive = recursive;
4205         (void) zfs_hold_one(zfs_handle_dup(zhp), &ha);
4206
4207         if (nvlist_next_nvpair(ha.nvl, NULL) == NULL) {
4208                 fnvlist_free(ha.nvl);
4209                 ret = ENOENT;
4210                 if (!enoent_ok) {
4211                         (void) snprintf(errbuf, sizeof (errbuf),
4212                             dgettext(TEXT_DOMAIN,
4213                             "cannot hold snapshot '%s@%s'"),
4214                             zhp->zfs_name, snapname);
4215                         (void) zfs_standard_error(hdl, ret, errbuf);
4216                 }
4217                 return (ret);
4218         }
4219
4220         ret = lzc_hold(ha.nvl, cleanup_fd, &errors);
4221         fnvlist_free(ha.nvl);
4222
4223         if (ret == 0)
4224                 return (0);
4225
4226         if (nvlist_next_nvpair(errors, NULL) == NULL) {
4227                 /* no hold-specific errors */
4228                 (void) snprintf(errbuf, sizeof (errbuf),
4229                     dgettext(TEXT_DOMAIN, "cannot hold"));
4230                 switch (ret) {
4231                 case ENOTSUP:
4232                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4233                             "pool must be upgraded"));
4234                         (void) zfs_error(hdl, EZFS_BADVERSION, errbuf);
4235                         break;
4236                 case EINVAL:
4237                         (void) zfs_error(hdl, EZFS_BADTYPE, errbuf);
4238                         break;
4239                 default:
4240                         (void) zfs_standard_error(hdl, ret, errbuf);
4241                 }
4242         }
4243
4244         for (elem = nvlist_next_nvpair(errors, NULL);
4245             elem != NULL;
4246             elem = nvlist_next_nvpair(errors, elem)) {
4247                 (void) snprintf(errbuf, sizeof (errbuf),
4248                     dgettext(TEXT_DOMAIN,
4249                     "cannot hold snapshot '%s'"), nvpair_name(elem));
4250                 switch (fnvpair_value_int32(elem)) {
4251                 case E2BIG:
4252                         /*
4253                          * Temporary tags wind up having the ds object id
4254                          * prepended. So even if we passed the length check
4255                          * above, it's still possible for the tag to wind
4256                          * up being slightly too long.
4257                          */
4258                         (void) zfs_error(hdl, EZFS_TAGTOOLONG, errbuf);
4259                         break;
4260                 case EINVAL:
4261                         (void) zfs_error(hdl, EZFS_BADTYPE, errbuf);
4262                         break;
4263                 case EEXIST:
4264                         (void) zfs_error(hdl, EZFS_REFTAG_HOLD, errbuf);
4265                         break;
4266                 case ENOENT:
4267                         if (enoent_ok)
4268                                 return (ENOENT);
4269                         /* FALLTHROUGH */
4270                 default:
4271                         (void) zfs_standard_error(hdl,
4272                             fnvpair_value_int32(elem), errbuf);
4273                 }
4274         }
4275
4276         fnvlist_free(errors);
4277         return (ret);
4278 }
4279
4280 struct releasearg {
4281         nvlist_t *nvl;
4282         const char *snapname;
4283         const char *tag;
4284         boolean_t recursive;
4285 };
4286
4287 static int
4288 zfs_release_one(zfs_handle_t *zhp, void *arg)
4289 {
4290         struct holdarg *ha = arg;
4291         zfs_handle_t *szhp;
4292         char name[ZFS_MAXNAMELEN];
4293         int rv = 0;
4294
4295         (void) snprintf(name, sizeof (name),
4296             "%s@%s", zhp->zfs_name, ha->snapname);
4297
4298         szhp = make_dataset_handle(zhp->zfs_hdl, name);
4299         if (szhp) {
4300                 nvlist_t *holds = fnvlist_alloc();
4301                 fnvlist_add_boolean(holds, ha->tag);
4302                 fnvlist_add_nvlist(ha->nvl, name, holds);
4303                 zfs_close(szhp);
4304         }
4305
4306         if (ha->recursive)
4307                 rv = zfs_iter_filesystems(zhp, zfs_release_one, ha);
4308         zfs_close(zhp);
4309         return (rv);
4310 }
4311
4312 int
4313 zfs_release(zfs_handle_t *zhp, const char *snapname, const char *tag,
4314     boolean_t recursive)
4315 {
4316         int ret;
4317         struct holdarg ha;
4318         nvlist_t *errors;
4319         nvpair_t *elem;
4320         libzfs_handle_t *hdl = zhp->zfs_hdl;
4321         char errbuf[1024];
4322
4323         ha.nvl = fnvlist_alloc();
4324         ha.snapname = snapname;
4325         ha.tag = tag;
4326         ha.recursive = recursive;
4327         (void) zfs_release_one(zfs_handle_dup(zhp), &ha);
4328
4329         if (nvlist_next_nvpair(ha.nvl, NULL) == NULL) {
4330                 fnvlist_free(ha.nvl);
4331                 ret = ENOENT;
4332                 (void) snprintf(errbuf, sizeof (errbuf),
4333                     dgettext(TEXT_DOMAIN,
4334                     "cannot release hold from snapshot '%s@%s'"),
4335                     zhp->zfs_name, snapname);
4336                 (void) zfs_standard_error(hdl, ret, errbuf);
4337                 return (ret);
4338         }
4339
4340         ret = lzc_release(ha.nvl, &errors);
4341         fnvlist_free(ha.nvl);
4342
4343         if (ret == 0)
4344                 return (0);
4345
4346         if (nvlist_next_nvpair(errors, NULL) == NULL) {
4347                 /* no hold-specific errors */
4348                 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
4349                     "cannot release"));
4350                 switch (errno) {
4351                 case ENOTSUP:
4352                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4353                             "pool must be upgraded"));
4354                         (void) zfs_error(hdl, EZFS_BADVERSION, errbuf);
4355                         break;
4356                 default:
4357                         (void) zfs_standard_error_fmt(hdl, errno, errbuf);
4358                 }
4359         }
4360
4361         for (elem = nvlist_next_nvpair(errors, NULL);
4362             elem != NULL;
4363             elem = nvlist_next_nvpair(errors, elem)) {
4364                 (void) snprintf(errbuf, sizeof (errbuf),
4365                     dgettext(TEXT_DOMAIN,
4366                     "cannot release hold from snapshot '%s'"),
4367                     nvpair_name(elem));
4368                 switch (fnvpair_value_int32(elem)) {
4369                 case ESRCH:
4370                         (void) zfs_error(hdl, EZFS_REFTAG_RELE, errbuf);
4371                         break;
4372                 case EINVAL:
4373                         (void) zfs_error(hdl, EZFS_BADTYPE, errbuf);
4374                         break;
4375                 default:
4376                         (void) zfs_standard_error_fmt(hdl,
4377                             fnvpair_value_int32(elem), errbuf);
4378                 }
4379         }
4380
4381         fnvlist_free(errors);
4382         return (ret);
4383 }
4384
4385 int
4386 zfs_get_fsacl(zfs_handle_t *zhp, nvlist_t **nvl)
4387 {
4388         zfs_cmd_t zc = { 0 };
4389         libzfs_handle_t *hdl = zhp->zfs_hdl;
4390         int nvsz = 2048;
4391         void *nvbuf;
4392         int err = 0;
4393         char errbuf[1024];
4394
4395         assert(zhp->zfs_type == ZFS_TYPE_VOLUME ||
4396             zhp->zfs_type == ZFS_TYPE_FILESYSTEM);
4397
4398 tryagain:
4399
4400         nvbuf = malloc(nvsz);
4401         if (nvbuf == NULL) {
4402                 err = (zfs_error(hdl, EZFS_NOMEM, strerror(errno)));
4403                 goto out;
4404         }
4405
4406         zc.zc_nvlist_dst_size = nvsz;
4407         zc.zc_nvlist_dst = (uintptr_t)nvbuf;
4408
4409         (void) strlcpy(zc.zc_name, zhp->zfs_name, ZFS_MAXNAMELEN);
4410
4411         if (ioctl(hdl->libzfs_fd, ZFS_IOC_GET_FSACL, &zc) != 0) {
4412                 (void) snprintf(errbuf, sizeof (errbuf),
4413                     dgettext(TEXT_DOMAIN, "cannot get permissions on '%s'"),
4414                     zc.zc_name);
4415                 switch (errno) {
4416                 case ENOMEM:
4417                         free(nvbuf);
4418                         nvsz = zc.zc_nvlist_dst_size;
4419                         goto tryagain;
4420
4421                 case ENOTSUP:
4422                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4423                             "pool must be upgraded"));
4424                         err = zfs_error(hdl, EZFS_BADVERSION, errbuf);
4425                         break;
4426                 case EINVAL:
4427                         err = zfs_error(hdl, EZFS_BADTYPE, errbuf);
4428                         break;
4429                 case ENOENT:
4430                         err = zfs_error(hdl, EZFS_NOENT, errbuf);
4431                         break;
4432                 default:
4433                         err = zfs_standard_error_fmt(hdl, errno, errbuf);
4434                         break;
4435                 }
4436         } else {
4437                 /* success */
4438                 int rc = nvlist_unpack(nvbuf, zc.zc_nvlist_dst_size, nvl, 0);
4439                 if (rc) {
4440                         (void) snprintf(errbuf, sizeof (errbuf), dgettext(
4441                             TEXT_DOMAIN, "cannot get permissions on '%s'"),
4442                             zc.zc_name);
4443                         err = zfs_standard_error_fmt(hdl, rc, errbuf);
4444                 }
4445         }
4446
4447         free(nvbuf);
4448 out:
4449         return (err);
4450 }
4451
4452 int
4453 zfs_set_fsacl(zfs_handle_t *zhp, boolean_t un, nvlist_t *nvl)
4454 {
4455         zfs_cmd_t zc = { 0 };
4456         libzfs_handle_t *hdl = zhp->zfs_hdl;
4457         char *nvbuf;
4458         char errbuf[1024];
4459         size_t nvsz;
4460         int err;
4461
4462         assert(zhp->zfs_type == ZFS_TYPE_VOLUME ||
4463             zhp->zfs_type == ZFS_TYPE_FILESYSTEM);
4464
4465         err = nvlist_size(nvl, &nvsz, NV_ENCODE_NATIVE);
4466         assert(err == 0);
4467
4468         nvbuf = malloc(nvsz);
4469
4470         err = nvlist_pack(nvl, &nvbuf, &nvsz, NV_ENCODE_NATIVE, 0);
4471         assert(err == 0);
4472
4473         zc.zc_nvlist_src_size = nvsz;
4474         zc.zc_nvlist_src = (uintptr_t)nvbuf;
4475         zc.zc_perm_action = un;
4476
4477         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
4478
4479         if (zfs_ioctl(hdl, ZFS_IOC_SET_FSACL, &zc) != 0) {
4480                 (void) snprintf(errbuf, sizeof (errbuf),
4481                     dgettext(TEXT_DOMAIN, "cannot set permissions on '%s'"),
4482                     zc.zc_name);
4483                 switch (errno) {
4484                 case ENOTSUP:
4485                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4486                             "pool must be upgraded"));
4487                         err = zfs_error(hdl, EZFS_BADVERSION, errbuf);
4488                         break;
4489                 case EINVAL:
4490                         err = zfs_error(hdl, EZFS_BADTYPE, errbuf);
4491                         break;
4492                 case ENOENT:
4493                         err = zfs_error(hdl, EZFS_NOENT, errbuf);
4494                         break;
4495                 default:
4496                         err = zfs_standard_error_fmt(hdl, errno, errbuf);
4497                         break;
4498                 }
4499         }
4500
4501         free(nvbuf);
4502
4503         return (err);
4504 }
4505
4506 int
4507 zfs_get_holds(zfs_handle_t *zhp, nvlist_t **nvl)
4508 {
4509         int err;
4510         char errbuf[1024];
4511
4512         err = lzc_get_holds(zhp->zfs_name, nvl);
4513
4514         if (err != 0) {
4515                 libzfs_handle_t *hdl = zhp->zfs_hdl;
4516
4517                 (void) snprintf(errbuf, sizeof (errbuf),
4518                     dgettext(TEXT_DOMAIN, "cannot get holds for '%s'"),
4519                     zhp->zfs_name);
4520                 switch (err) {
4521                 case ENOTSUP:
4522                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4523                             "pool must be upgraded"));
4524                         err = zfs_error(hdl, EZFS_BADVERSION, errbuf);
4525                         break;
4526                 case EINVAL:
4527                         err = zfs_error(hdl, EZFS_BADTYPE, errbuf);
4528                         break;
4529                 case ENOENT:
4530                         err = zfs_error(hdl, EZFS_NOENT, errbuf);
4531                         break;
4532                 default:
4533                         err = zfs_standard_error_fmt(hdl, errno, errbuf);
4534                         break;
4535                 }
4536         }
4537
4538         return (err);
4539 }
4540
4541 /*
4542  * Convert the zvol's volume size to an appropriate reservation.
4543  * Note: If this routine is updated, it is necessary to update the ZFS test
4544  * suite's shell version in reservation.kshlib.
4545  */
4546 uint64_t
4547 zvol_volsize_to_reservation(uint64_t volsize, nvlist_t *props)
4548 {
4549         uint64_t numdb;
4550         uint64_t nblocks, volblocksize;
4551         int ncopies;
4552         char *strval;
4553
4554         if (nvlist_lookup_string(props,
4555             zfs_prop_to_name(ZFS_PROP_COPIES), &strval) == 0)
4556                 ncopies = atoi(strval);
4557         else
4558                 ncopies = 1;
4559         if (nvlist_lookup_uint64(props,
4560             zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE),
4561             &volblocksize) != 0)
4562                 volblocksize = ZVOL_DEFAULT_BLOCKSIZE;
4563         nblocks = volsize/volblocksize;
4564         /* start with metadnode L0-L6 */
4565         numdb = 7;
4566         /* calculate number of indirects */
4567         while (nblocks > 1) {
4568                 nblocks += DNODES_PER_LEVEL - 1;
4569                 nblocks /= DNODES_PER_LEVEL;
4570                 numdb += nblocks;
4571         }
4572         numdb *= MIN(SPA_DVAS_PER_BP, ncopies + 1);
4573         volsize *= ncopies;
4574         /*
4575          * this is exactly DN_MAX_INDBLKSHIFT when metadata isn't
4576          * compressed, but in practice they compress down to about
4577          * 1100 bytes
4578          */
4579         numdb *= 1ULL << DN_MAX_INDBLKSHIFT;
4580         volsize += numdb;
4581         return (volsize);
4582 }
4583
4584 /*
4585  * Attach/detach the given filesystem to/from the given jail.
4586  */
4587 int
4588 zfs_jail(zfs_handle_t *zhp, int jailid, int attach)
4589 {
4590         libzfs_handle_t *hdl = zhp->zfs_hdl;
4591         zfs_cmd_t zc = { 0 };
4592         char errbuf[1024];
4593         unsigned long cmd;
4594         int ret;
4595
4596         if (attach) {
4597                 (void) snprintf(errbuf, sizeof (errbuf),
4598                     dgettext(TEXT_DOMAIN, "cannot jail '%s'"), zhp->zfs_name);
4599         } else {
4600                 (void) snprintf(errbuf, sizeof (errbuf),
4601                     dgettext(TEXT_DOMAIN, "cannot jail '%s'"), zhp->zfs_name);
4602         }
4603
4604         switch (zhp->zfs_type) {
4605         case ZFS_TYPE_VOLUME:
4606                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4607                     "volumes can not be jailed"));
4608                 return (zfs_error(hdl, EZFS_BADTYPE, errbuf));
4609         case ZFS_TYPE_SNAPSHOT:
4610                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4611                     "snapshots can not be jailed"));
4612                 return (zfs_error(hdl, EZFS_BADTYPE, errbuf));
4613         }
4614         assert(zhp->zfs_type == ZFS_TYPE_FILESYSTEM);
4615
4616         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
4617         zc.zc_objset_type = DMU_OST_ZFS;
4618         zc.zc_jailid = jailid;
4619
4620         cmd = attach ? ZFS_IOC_JAIL : ZFS_IOC_UNJAIL;
4621         if ((ret = ioctl(hdl->libzfs_fd, cmd, &zc)) != 0)
4622                 zfs_standard_error(hdl, errno, errbuf);
4623
4624         return (ret);
4625 }