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 (c) 2013, Joyent, Inc. All rights reserved.
  25  * Copyright (c) 2011, 2014 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  * Copyright (c) 2013 Steven Hartland. All rights reserved.
  31  * Copyright 2013 Nexenta Systems, Inc.  All rights reserved.
  32  */
  33
  34 #include <ctype.h>
  35 #include <errno.h>
  36 #include <libintl.h>
  37 #include <math.h>
  38 #include <stdio.h>
  39 #include <stdlib.h>
  40 #include <strings.h>
  41 #include <unistd.h>
  42 #include <stddef.h>
  43 #include <zone.h>
  44 #include <fcntl.h>
  45 #include <sys/mntent.h>
  46 #include <sys/mount.h>
  47 #include <priv.h>
  48 #include <pwd.h>
  49 #include <grp.h>
  50 #include <stddef.h>
  51 #include <idmap.h>
  52
  53 #include <sys/dnode.h>
  54 #include <sys/spa.h>
  55 #include <sys/zap.h>
  56 #include <sys/misc.h>
  57 #include <libzfs.h>
  58
  59 #include "zfs_namecheck.h"
  60 #include "zfs_prop.h"
  61 #include "libzfs_impl.h"
  62 #include "zfs_deleg.h"
  63
  64 static int userquota_propname_decode(const char *propname, boolean_t zoned,
  65     zfs_userquota_prop_t *typep, char *domain, int domainlen, uint64_t *ridp);
  66
  67 /*
  68  * Given a single type (not a mask of types), return the type in a human
  69  * readable form.
  70  */
  71 const char *
  72 zfs_type_to_name(zfs_type_t type)
  73 {
  74         switch (type) {
  75         case ZFS_TYPE_FILESYSTEM:
  76                 return (dgettext(TEXT_DOMAIN, "filesystem"));
  77         case ZFS_TYPE_SNAPSHOT:
  78                 return (dgettext(TEXT_DOMAIN, "snapshot"));
  79         case ZFS_TYPE_VOLUME:
  80                 return (dgettext(TEXT_DOMAIN, "volume"));
  81         }
  82
  83         return (NULL);
  84 }
  85
  86 /*
  87  * Given a path and mask of ZFS types, return a string describing this dataset.
  88  * This is used when we fail to open a dataset and we cannot get an exact type.
  89  * We guess what the type would have been based on the path and the mask of
  90  * acceptable types.
  91  */
  92 static const char *
  93 path_to_str(const char *path, int types)
  94 {
  95         /*
  96          * When given a single type, always report the exact type.
  97          */
  98         if (types == ZFS_TYPE_SNAPSHOT)
  99                 return (dgettext(TEXT_DOMAIN, "snapshot"));
 100         if (types == ZFS_TYPE_FILESYSTEM)
 101                 return (dgettext(TEXT_DOMAIN, "filesystem"));
 102         if (types == ZFS_TYPE_VOLUME)
 103                 return (dgettext(TEXT_DOMAIN, "volume"));
 104
 105         /*
 106          * The user is requesting more than one type of dataset.  If this is the
 107          * case, consult the path itself.  If we're looking for a snapshot, and
 108          * a '@' is found, then report it as "snapshot".  Otherwise, remove the
 109          * snapshot attribute and try again.
 110          */
 111         if (types & ZFS_TYPE_SNAPSHOT) {
 112                 if (strchr(path, '@') != NULL)
 113                         return (dgettext(TEXT_DOMAIN, "snapshot"));
 114                 return (path_to_str(path, types & ~ZFS_TYPE_SNAPSHOT));
 115         }
 116
 117         /*
 118          * The user has requested either filesystems or volumes.
 119          * We have no way of knowing a priori what type this would be, so always
 120          * report it as "filesystem" or "volume", our two primitive types.
 121          */
 122         if (types & ZFS_TYPE_FILESYSTEM)
 123                 return (dgettext(TEXT_DOMAIN, "filesystem"));
 124
 125         assert(types & ZFS_TYPE_VOLUME);
 126         return (dgettext(TEXT_DOMAIN, "volume"));
 127 }
 128
 129 /*
 130  * Validate a ZFS path.  This is used even before trying to open the dataset, to
 131  * provide a more meaningful error message.  We call zfs_error_aux() to
 132  * explain exactly why the name was not valid.
 133  */
 134 int
 135 zfs_validate_name(libzfs_handle_t *hdl, const char *path, int type,
 136     boolean_t modifying)
 137 {
 138         namecheck_err_t why;
 139         char what;
 140
 141         (void) zfs_prop_get_table();
 142         if (dataset_namecheck(path, &why, &what) != 0) {
 143                 if (hdl != NULL) {
 144                         switch (why) {
 145                         case NAME_ERR_TOOLONG:
 146                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 147                                     "name is too long"));
 148                                 break;
 149
 150                         case NAME_ERR_LEADING_SLASH:
 151                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 152                                     "leading slash in name"));
 153                                 break;
 154
 155                         case NAME_ERR_EMPTY_COMPONENT:
 156                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 157                                     "empty component in name"));
 158                                 break;
 159
 160                         case NAME_ERR_TRAILING_SLASH:
 161                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 162                                     "trailing slash in name"));
 163                                 break;
 164
 165                         case NAME_ERR_INVALCHAR:
 166                                 zfs_error_aux(hdl,
 167                                     dgettext(TEXT_DOMAIN, "invalid character "
 168                                     "'%c' in name"), what);
 169                                 break;
 170
 171                         case NAME_ERR_MULTIPLE_AT:
 172                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 173                                     "multiple '@' delimiters in name"));
 174                                 break;
 175
 176                         case NAME_ERR_NOLETTER:
 177                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 178                                     "pool doesn't begin with a letter"));
 179                                 break;
 180
 181                         case NAME_ERR_RESERVED:
 182                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 183                                     "name is reserved"));
 184                                 break;
 185
 186                         case NAME_ERR_DISKLIKE:
 187                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 188                                     "reserved disk name"));
 189                                 break;
 190                         }
 191                 }
 192
 193                 return (0);
 194         }
 195
 196         if (!(type & ZFS_TYPE_SNAPSHOT) && strchr(path, '@') != NULL) {
 197                 if (hdl != NULL)
 198                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 199                             "snapshot delimiter '@' in filesystem name"));
 200                 return (0);
 201         }
 202
 203         if (type == ZFS_TYPE_SNAPSHOT && strchr(path, '@') == NULL) {
 204                 if (hdl != NULL)
 205                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 206                             "missing '@' delimiter in snapshot name"));
 207                 return (0);
 208         }
 209
 210         if (modifying && strchr(path, '%') != NULL) {
 211                 if (hdl != NULL)
 212                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 213                             "invalid character %c in name"), '%');
 214                 return (0);
 215         }
 216
 217         return (-1);
 218 }
 219
 220 int
 221 zfs_name_valid(const char *name, zfs_type_t type)
 222 {
 223         if (type == ZFS_TYPE_POOL)
 224                 return (zpool_name_valid(NULL, B_FALSE, name));
 225         return (zfs_validate_name(NULL, name, type, B_FALSE));
 226 }
 227
 228 /*
 229  * This function takes the raw DSL properties, and filters out the user-defined
 230  * properties into a separate nvlist.
 231  */
 232 static nvlist_t *
 233 process_user_props(zfs_handle_t *zhp, nvlist_t *props)
 234 {
 235         libzfs_handle_t *hdl = zhp->zfs_hdl;
 236         nvpair_t *elem;
 237         nvlist_t *propval;
 238         nvlist_t *nvl;
 239
 240         if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0) != 0) {
 241                 (void) no_memory(hdl);
 242                 return (NULL);
 243         }
 244
 245         elem = NULL;
 246         while ((elem = nvlist_next_nvpair(props, elem)) != NULL) {
 247                 if (!zfs_prop_user(nvpair_name(elem)))
 248                         continue;
 249
 250                 verify(nvpair_value_nvlist(elem, &propval) == 0);
 251                 if (nvlist_add_nvlist(nvl, nvpair_name(elem), propval) != 0) {
 252                         nvlist_free(nvl);
 253                         (void) no_memory(hdl);
 254                         return (NULL);
 255                 }
 256         }
 257
 258         return (nvl);
 259 }
 260
 261 static zpool_handle_t *
 262 zpool_add_handle(zfs_handle_t *zhp, const char *pool_name)
 263 {
 264         libzfs_handle_t *hdl = zhp->zfs_hdl;
 265         zpool_handle_t *zph;
 266
 267         if ((zph = zpool_open_canfail(hdl, pool_name)) != NULL) {
 268                 if (hdl->libzfs_pool_handles != NULL)
 269                         zph->zpool_next = hdl->libzfs_pool_handles;
 270                 hdl->libzfs_pool_handles = zph;
 271         }
 272         return (zph);
 273 }
 274
 275 static zpool_handle_t *
 276 zpool_find_handle(zfs_handle_t *zhp, const char *pool_name, int len)
 277 {
 278         libzfs_handle_t *hdl = zhp->zfs_hdl;
 279         zpool_handle_t *zph = hdl->libzfs_pool_handles;
 280
 281         while ((zph != NULL) &&
 282             (strncmp(pool_name, zpool_get_name(zph), len) != 0))
 283                 zph = zph->zpool_next;
 284         return (zph);
 285 }
 286
 287 /*
 288  * Returns a handle to the pool that contains the provided dataset.
 289  * If a handle to that pool already exists then that handle is returned.
 290  * Otherwise, a new handle is created and added to the list of handles.
 291  */
 292 static zpool_handle_t *
 293 zpool_handle(zfs_handle_t *zhp)
 294 {
 295         char *pool_name;
 296         int len;
 297         zpool_handle_t *zph;
 298
 299         len = strcspn(zhp->zfs_name, "/@#") + 1;
 300         pool_name = zfs_alloc(zhp->zfs_hdl, len);
 301         (void) strlcpy(pool_name, zhp->zfs_name, len);
 302
 303         zph = zpool_find_handle(zhp, pool_name, len);
 304         if (zph == NULL)
 305                 zph = zpool_add_handle(zhp, pool_name);
 306
 307         free(pool_name);
 308         return (zph);
 309 }
 310
 311 void
 312 zpool_free_handles(libzfs_handle_t *hdl)
 313 {
 314         zpool_handle_t *next, *zph = hdl->libzfs_pool_handles;
 315
 316         while (zph != NULL) {
 317                 next = zph->zpool_next;
 318                 zpool_close(zph);
 319                 zph = next;
 320         }
 321         hdl->libzfs_pool_handles = NULL;
 322 }
 323
 324 /*
 325  * Utility function to gather stats (objset and zpl) for the given object.
 326  */
 327 static int
 328 get_stats_ioctl(zfs_handle_t *zhp, zfs_cmd_t *zc)
 329 {
 330         libzfs_handle_t *hdl = zhp->zfs_hdl;
 331
 332         (void) strlcpy(zc->zc_name, zhp->zfs_name, sizeof (zc->zc_name));
 333
 334         while (ioctl(hdl->libzfs_fd, ZFS_IOC_OBJSET_STATS, zc) != 0) {
 335                 if (errno == ENOMEM) {
 336                         if (zcmd_expand_dst_nvlist(hdl, zc) != 0) {
 337                                 return (-1);
 338                         }
 339                 } else {
 340                         return (-1);
 341                 }
 342         }
 343         return (0);
 344 }
 345
 346 /*
 347  * Utility function to get the received properties of the given object.
 348  */
 349 static int
 350 get_recvd_props_ioctl(zfs_handle_t *zhp)
 351 {
 352         libzfs_handle_t *hdl = zhp->zfs_hdl;
 353         nvlist_t *recvdprops;
 354         zfs_cmd_t zc = { 0 };
 355         int err;
 356
 357         if (zcmd_alloc_dst_nvlist(hdl, &zc, 0) != 0)
 358                 return (-1);
 359
 360         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
 361
 362         while (ioctl(hdl->libzfs_fd, ZFS_IOC_OBJSET_RECVD_PROPS, &zc) != 0) {
 363                 if (errno == ENOMEM) {
 364                         if (zcmd_expand_dst_nvlist(hdl, &zc) != 0) {
 365                                 return (-1);
 366                         }
 367                 } else {
 368                         zcmd_free_nvlists(&zc);
 369                         return (-1);
 370                 }
 371         }
 372
 373         err = zcmd_read_dst_nvlist(zhp->zfs_hdl, &zc, &recvdprops);
 374         zcmd_free_nvlists(&zc);
 375         if (err != 0)
 376                 return (-1);
 377
 378         nvlist_free(zhp->zfs_recvd_props);
 379         zhp->zfs_recvd_props = recvdprops;
 380
 381         return (0);
 382 }
 383
 384 static int
 385 put_stats_zhdl(zfs_handle_t *zhp, zfs_cmd_t *zc)
 386 {
 387         nvlist_t *allprops, *userprops;
 388
 389         zhp->zfs_dmustats = zc->zc_objset_stats; /* structure assignment */
 390
 391         if (zcmd_read_dst_nvlist(zhp->zfs_hdl, zc, &allprops) != 0) {
 392                 return (-1);
 393         }
 394
 395         /*
 396          * XXX Why do we store the user props separately, in addition to
 397          * storing them in zfs_props?
 398          */
 399         if ((userprops = process_user_props(zhp, allprops)) == NULL) {
 400                 nvlist_free(allprops);
 401                 return (-1);
 402         }
 403
 404         nvlist_free(zhp->zfs_props);
 405         nvlist_free(zhp->zfs_user_props);
 406
 407         zhp->zfs_props = allprops;
 408         zhp->zfs_user_props = userprops;
 409
 410         return (0);
 411 }
 412
 413 static int
 414 get_stats(zfs_handle_t *zhp)
 415 {
 416         int rc = 0;
 417         zfs_cmd_t zc = { 0 };
 418
 419         if (zcmd_alloc_dst_nvlist(zhp->zfs_hdl, &zc, 0) != 0)
 420                 return (-1);
 421         if (get_stats_ioctl(zhp, &zc) != 0)
 422                 rc = -1;
 423         else if (put_stats_zhdl(zhp, &zc) != 0)
 424                 rc = -1;
 425         zcmd_free_nvlists(&zc);
 426         return (rc);
 427 }
 428
 429 /*
 430  * Refresh the properties currently stored in the handle.
 431  */
 432 void
 433 zfs_refresh_properties(zfs_handle_t *zhp)
 434 {
 435         (void) get_stats(zhp);
 436 }
 437
 438 /*
 439  * Makes a handle from the given dataset name.  Used by zfs_open() and
 440  * zfs_iter_* to create child handles on the fly.
 441  */
 442 static int
 443 make_dataset_handle_common(zfs_handle_t *zhp, zfs_cmd_t *zc)
 444 {
 445         if (put_stats_zhdl(zhp, zc) != 0)
 446                 return (-1);
 447
 448         /*
 449          * We've managed to open the dataset and gather statistics.  Determine
 450          * the high-level type.
 451          */
 452         if (zhp->zfs_dmustats.dds_type == DMU_OST_ZVOL)
 453                 zhp->zfs_head_type = ZFS_TYPE_VOLUME;
 454         else if (zhp->zfs_dmustats.dds_type == DMU_OST_ZFS)
 455                 zhp->zfs_head_type = ZFS_TYPE_FILESYSTEM;
 456         else
 457                 abort();
 458
 459         if (zhp->zfs_dmustats.dds_is_snapshot)
 460                 zhp->zfs_type = ZFS_TYPE_SNAPSHOT;
 461         else if (zhp->zfs_dmustats.dds_type == DMU_OST_ZVOL)
 462                 zhp->zfs_type = ZFS_TYPE_VOLUME;
 463         else if (zhp->zfs_dmustats.dds_type == DMU_OST_ZFS)
 464                 zhp->zfs_type = ZFS_TYPE_FILESYSTEM;
 465         else
 466                 abort();        /* we should never see any other types */
 467
 468         if ((zhp->zpool_hdl = zpool_handle(zhp)) == NULL)
 469                 return (-1);
 470
 471         return (0);
 472 }
 473
 474 zfs_handle_t *
 475 make_dataset_handle(libzfs_handle_t *hdl, const char *path)
 476 {
 477         zfs_cmd_t zc = { 0 };
 478
 479         zfs_handle_t *zhp = calloc(sizeof (zfs_handle_t), 1);
 480
 481         if (zhp == NULL)
 482                 return (NULL);
 483
 484         zhp->zfs_hdl = hdl;
 485         (void) strlcpy(zhp->zfs_name, path, sizeof (zhp->zfs_name));
 486         if (zcmd_alloc_dst_nvlist(hdl, &zc, 0) != 0) {
 487                 free(zhp);
 488                 return (NULL);
 489         }
 490         if (get_stats_ioctl(zhp, &zc) == -1) {
 491                 zcmd_free_nvlists(&zc);
 492                 free(zhp);
 493                 return (NULL);
 494         }
 495         if (make_dataset_handle_common(zhp, &zc) == -1) {
 496                 free(zhp);
 497                 zhp = NULL;
 498         }
 499         zcmd_free_nvlists(&zc);
 500         return (zhp);
 501 }
 502
 503 zfs_handle_t *
 504 make_dataset_handle_zc(libzfs_handle_t *hdl, zfs_cmd_t *zc)
 505 {
 506         zfs_handle_t *zhp = calloc(sizeof (zfs_handle_t), 1);
 507
 508         if (zhp == NULL)
 509                 return (NULL);
 510
 511         zhp->zfs_hdl = hdl;
 512         (void) strlcpy(zhp->zfs_name, zc->zc_name, sizeof (zhp->zfs_name));
 513         if (make_dataset_handle_common(zhp, zc) == -1) {
 514                 free(zhp);
 515                 return (NULL);
 516         }
 517         return (zhp);
 518 }
 519
 520 zfs_handle_t *
 521 make_dataset_simple_handle_zc(zfs_handle_t *pzhp, zfs_cmd_t *zc)
 522 {
 523         zfs_handle_t *zhp = calloc(sizeof (zfs_handle_t), 1);
 524
 525         if (zhp == NULL)
 526                 return (NULL);
 527
 528         zhp->zfs_hdl = pzhp->zfs_hdl;
 529         (void) strlcpy(zhp->zfs_name, zc->zc_name, sizeof (zhp->zfs_name));
 530         zhp->zfs_head_type = pzhp->zfs_type;
 531         zhp->zfs_type = ZFS_TYPE_SNAPSHOT;
 532         zhp->zpool_hdl = zpool_handle(zhp);
 533         return (zhp);
 534 }
 535
 536 zfs_handle_t *
 537 zfs_handle_dup(zfs_handle_t *zhp_orig)
 538 {
 539         zfs_handle_t *zhp = calloc(sizeof (zfs_handle_t), 1);
 540
 541         if (zhp == NULL)
 542                 return (NULL);
 543
 544         zhp->zfs_hdl = zhp_orig->zfs_hdl;
 545         zhp->zpool_hdl = zhp_orig->zpool_hdl;
 546         (void) strlcpy(zhp->zfs_name, zhp_orig->zfs_name,
 547             sizeof (zhp->zfs_name));
 548         zhp->zfs_type = zhp_orig->zfs_type;
 549         zhp->zfs_head_type = zhp_orig->zfs_head_type;
 550         zhp->zfs_dmustats = zhp_orig->zfs_dmustats;
 551         if (zhp_orig->zfs_props != NULL) {
 552                 if (nvlist_dup(zhp_orig->zfs_props, &zhp->zfs_props, 0) != 0) {
 553                         (void) no_memory(zhp->zfs_hdl);
 554                         zfs_close(zhp);
 555                         return (NULL);
 556                 }
 557         }
 558         if (zhp_orig->zfs_user_props != NULL) {
 559                 if (nvlist_dup(zhp_orig->zfs_user_props,
 560                     &zhp->zfs_user_props, 0) != 0) {
 561                         (void) no_memory(zhp->zfs_hdl);
 562                         zfs_close(zhp);
 563                         return (NULL);
 564                 }
 565         }
 566         if (zhp_orig->zfs_recvd_props != NULL) {
 567                 if (nvlist_dup(zhp_orig->zfs_recvd_props,
 568                     &zhp->zfs_recvd_props, 0)) {
 569                         (void) no_memory(zhp->zfs_hdl);
 570                         zfs_close(zhp);
 571                         return (NULL);
 572                 }
 573         }
 574         zhp->zfs_mntcheck = zhp_orig->zfs_mntcheck;
 575         if (zhp_orig->zfs_mntopts != NULL) {
 576                 zhp->zfs_mntopts = zfs_strdup(zhp_orig->zfs_hdl,
 577                     zhp_orig->zfs_mntopts);
 578         }
 579         zhp->zfs_props_table = zhp_orig->zfs_props_table;
 580         return (zhp);
 581 }
 582
 583 boolean_t
 584 zfs_bookmark_exists(const char *path)
 585 {
 586         nvlist_t *bmarks;
 587         nvlist_t *props;
 588         char fsname[ZFS_MAXNAMELEN];
 589         char *bmark_name;
 590         char *pound;
 591         int err;
 592         boolean_t rv;
 593
 594
 595         (void) strlcpy(fsname, path, sizeof (fsname));
 596         pound = strchr(fsname, '#');
 597         if (pound == NULL)
 598                 return (B_FALSE);
 599
 600         *pound = '\0';
 601         bmark_name = pound + 1;
 602         props = fnvlist_alloc();
 603         err = lzc_get_bookmarks(fsname, props, &bmarks);
 604         nvlist_free(props);
 605         if (err != 0) {
 606                 nvlist_free(bmarks);
 607                 return (B_FALSE);
 608         }
 609
 610         rv = nvlist_exists(bmarks, bmark_name);
 611         nvlist_free(bmarks);
 612         return (rv);
 613 }
 614
 615 zfs_handle_t *
 616 make_bookmark_handle(zfs_handle_t *parent, const char *path,
 617     nvlist_t *bmark_props)
 618 {
 619         zfs_handle_t *zhp = calloc(sizeof (zfs_handle_t), 1);
 620
 621         if (zhp == NULL)
 622                 return (NULL);
 623
 624         /* Fill in the name. */
 625         zhp->zfs_hdl = parent->zfs_hdl;
 626         (void) strlcpy(zhp->zfs_name, path, sizeof (zhp->zfs_name));
 627
 628         /* Set the property lists. */
 629         if (nvlist_dup(bmark_props, &zhp->zfs_props, 0) != 0) {
 630                 free(zhp);
 631                 return (NULL);
 632         }
 633
 634         /* Set the types. */
 635         zhp->zfs_head_type = parent->zfs_head_type;
 636         zhp->zfs_type = ZFS_TYPE_BOOKMARK;
 637
 638         if ((zhp->zpool_hdl = zpool_handle(zhp)) == NULL) {
 639                 nvlist_free(zhp->zfs_props);
 640                 free(zhp);
 641                 return (NULL);
 642         }
 643
 644         return (zhp);
 645 }
 646
 647 /*
 648  * Opens the given snapshot, filesystem, or volume.   The 'types'
 649  * argument is a mask of acceptable types.  The function will print an
 650  * appropriate error message and return NULL if it can't be opened.
 651  */
 652 zfs_handle_t *
 653 zfs_open(libzfs_handle_t *hdl, const char *path, int types)
 654 {
 655         zfs_handle_t *zhp;
 656         char errbuf[1024];
 657
 658         (void) snprintf(errbuf, sizeof (errbuf),
 659             dgettext(TEXT_DOMAIN, "cannot open '%s'"), path);
 660
 661         /*
 662          * Validate the name before we even try to open it.
 663          */
 664         if (!zfs_validate_name(hdl, path, ZFS_TYPE_DATASET, B_FALSE)) {
 665                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 666                     "invalid dataset name"));
 667                 (void) zfs_error(hdl, EZFS_INVALIDNAME, errbuf);
 668                 return (NULL);
 669         }
 670
 671         /*
 672          * Try to get stats for the dataset, which will tell us if it exists.
 673          */
 674         errno = 0;
 675         if ((zhp = make_dataset_handle(hdl, path)) == NULL) {
 676                 (void) zfs_standard_error(hdl, errno, errbuf);
 677                 return (NULL);
 678         }
 679
 680         if (zhp == NULL) {
 681                 char *at = strchr(path, '@');
 682
 683                 if (at != NULL)
 684                         *at = '\0';
 685                 errno = 0;
 686                 if ((zhp = make_dataset_handle(hdl, path)) == NULL) {
 687                         (void) zfs_standard_error(hdl, errno, errbuf);
 688                         return (NULL);
 689                 }
 690                 if (at != NULL)
 691                         *at = '@';
 692                 (void) strlcpy(zhp->zfs_name, path, sizeof (zhp->zfs_name));
 693                 zhp->zfs_type = ZFS_TYPE_SNAPSHOT;
 694         }
 695
 696         if (!(types & zhp->zfs_type)) {
 697                 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf);
 698                 zfs_close(zhp);
 699                 return (NULL);
 700         }
 701
 702         return (zhp);
 703 }
 704
 705 /*
 706  * Release a ZFS handle.  Nothing to do but free the associated memory.
 707  */
 708 void
 709 zfs_close(zfs_handle_t *zhp)
 710 {
 711         if (zhp->zfs_mntopts)
 712                 free(zhp->zfs_mntopts);
 713         nvlist_free(zhp->zfs_props);
 714         nvlist_free(zhp->zfs_user_props);
 715         nvlist_free(zhp->zfs_recvd_props);
 716         free(zhp);
 717 }
 718
 719 typedef struct mnttab_node {
 720         struct mnttab mtn_mt;
 721         avl_node_t mtn_node;
 722 } mnttab_node_t;
 723
 724 static int
 725 libzfs_mnttab_cache_compare(const void *arg1, const void *arg2)
 726 {
 727         const mnttab_node_t *mtn1 = arg1;
 728         const mnttab_node_t *mtn2 = arg2;
 729         int rv;
 730
 731         rv = strcmp(mtn1->mtn_mt.mnt_special, mtn2->mtn_mt.mnt_special);
 732
 733         if (rv == 0)
 734                 return (0);
 735         return (rv > 0 ? 1 : -1);
 736 }
 737
 738 void
 739 libzfs_mnttab_init(libzfs_handle_t *hdl)
 740 {
 741         assert(avl_numnodes(&hdl->libzfs_mnttab_cache) == 0);
 742         avl_create(&hdl->libzfs_mnttab_cache, libzfs_mnttab_cache_compare,
 743             sizeof (mnttab_node_t), offsetof(mnttab_node_t, mtn_node));
 744 }
 745
 746 void
 747 libzfs_mnttab_update(libzfs_handle_t *hdl)
 748 {
 749         struct mnttab entry;
 750
 751         rewind(hdl->libzfs_mnttab);
 752         while (getmntent(hdl->libzfs_mnttab, &entry) == 0) {
 753                 mnttab_node_t *mtn;
 754
 755                 if (strcmp(entry.mnt_fstype, MNTTYPE_ZFS) != 0)
 756                         continue;
 757                 mtn = zfs_alloc(hdl, sizeof (mnttab_node_t));
 758                 mtn->mtn_mt.mnt_special = zfs_strdup(hdl, entry.mnt_special);
 759                 mtn->mtn_mt.mnt_mountp = zfs_strdup(hdl, entry.mnt_mountp);
 760                 mtn->mtn_mt.mnt_fstype = zfs_strdup(hdl, entry.mnt_fstype);
 761                 mtn->mtn_mt.mnt_mntopts = zfs_strdup(hdl, entry.mnt_mntopts);
 762                 avl_add(&hdl->libzfs_mnttab_cache, mtn);
 763         }
 764 }
 765
 766 void
 767 libzfs_mnttab_fini(libzfs_handle_t *hdl)
 768 {
 769         void *cookie = NULL;
 770         mnttab_node_t *mtn;
 771
 772         while (mtn = avl_destroy_nodes(&hdl->libzfs_mnttab_cache, &cookie)) {
 773                 free(mtn->mtn_mt.mnt_special);
 774                 free(mtn->mtn_mt.mnt_mountp);
 775                 free(mtn->mtn_mt.mnt_fstype);
 776                 free(mtn->mtn_mt.mnt_mntopts);
 777                 free(mtn);
 778         }
 779         avl_destroy(&hdl->libzfs_mnttab_cache);
 780 }
 781
 782 void
 783 libzfs_mnttab_cache(libzfs_handle_t *hdl, boolean_t enable)
 784 {
 785         hdl->libzfs_mnttab_enable = enable;
 786 }
 787
 788 int
 789 libzfs_mnttab_find(libzfs_handle_t *hdl, const char *fsname,
 790     struct mnttab *entry)
 791 {
 792         mnttab_node_t find;
 793         mnttab_node_t *mtn;
 794
 795         if (!hdl->libzfs_mnttab_enable) {
 796                 struct mnttab srch = { 0 };
 797
 798                 if (avl_numnodes(&hdl->libzfs_mnttab_cache))
 799                         libzfs_mnttab_fini(hdl);
 800                 rewind(hdl->libzfs_mnttab);
 801                 srch.mnt_special = (char *)fsname;
 802                 srch.mnt_fstype = MNTTYPE_ZFS;
 803                 if (getmntany(hdl->libzfs_mnttab, entry, &srch) == 0)
 804                         return (0);
 805                 else
 806                         return (ENOENT);
 807         }
 808
 809         if (avl_numnodes(&hdl->libzfs_mnttab_cache) == 0)
 810                 libzfs_mnttab_update(hdl);
 811
 812         find.mtn_mt.mnt_special = (char *)fsname;
 813         mtn = avl_find(&hdl->libzfs_mnttab_cache, &find, NULL);
 814         if (mtn) {
 815                 *entry = mtn->mtn_mt;
 816                 return (0);
 817         }
 818         return (ENOENT);
 819 }
 820
 821 void
 822 libzfs_mnttab_add(libzfs_handle_t *hdl, const char *special,
 823     const char *mountp, const char *mntopts)
 824 {
 825         mnttab_node_t *mtn;
 826
 827         if (avl_numnodes(&hdl->libzfs_mnttab_cache) == 0)
 828                 return;
 829         mtn = zfs_alloc(hdl, sizeof (mnttab_node_t));
 830         mtn->mtn_mt.mnt_special = zfs_strdup(hdl, special);
 831         mtn->mtn_mt.mnt_mountp = zfs_strdup(hdl, mountp);
 832         mtn->mtn_mt.mnt_fstype = zfs_strdup(hdl, MNTTYPE_ZFS);
 833         mtn->mtn_mt.mnt_mntopts = zfs_strdup(hdl, mntopts);
 834         avl_add(&hdl->libzfs_mnttab_cache, mtn);
 835 }
 836
 837 void
 838 libzfs_mnttab_remove(libzfs_handle_t *hdl, const char *fsname)
 839 {
 840         mnttab_node_t find;
 841         mnttab_node_t *ret;
 842
 843         find.mtn_mt.mnt_special = (char *)fsname;
 844         if (ret = avl_find(&hdl->libzfs_mnttab_cache, (void *)&find, NULL)) {
 845                 avl_remove(&hdl->libzfs_mnttab_cache, ret);
 846                 free(ret->mtn_mt.mnt_special);
 847                 free(ret->mtn_mt.mnt_mountp);
 848                 free(ret->mtn_mt.mnt_fstype);
 849                 free(ret->mtn_mt.mnt_mntopts);
 850                 free(ret);
 851         }
 852 }
 853
 854 int
 855 zfs_spa_version(zfs_handle_t *zhp, int *spa_version)
 856 {
 857         zpool_handle_t *zpool_handle = zhp->zpool_hdl;
 858
 859         if (zpool_handle == NULL)
 860                 return (-1);
 861
 862         *spa_version = zpool_get_prop_int(zpool_handle,
 863             ZPOOL_PROP_VERSION, NULL);
 864         return (0);
 865 }
 866
 867 /*
 868  * The choice of reservation property depends on the SPA version.
 869  */
 870 static int
 871 zfs_which_resv_prop(zfs_handle_t *zhp, zfs_prop_t *resv_prop)
 872 {
 873         int spa_version;
 874
 875         if (zfs_spa_version(zhp, &spa_version) < 0)
 876                 return (-1);
 877
 878         if (spa_version >= SPA_VERSION_REFRESERVATION)
 879                 *resv_prop = ZFS_PROP_REFRESERVATION;
 880         else
 881                 *resv_prop = ZFS_PROP_RESERVATION;
 882
 883         return (0);
 884 }
 885
 886 /*
 887  * Given an nvlist of properties to set, validates that they are correct, and
 888  * parses any numeric properties (index, boolean, etc) if they are specified as
 889  * strings.
 890  */
 891 nvlist_t *
 892 zfs_valid_proplist(libzfs_handle_t *hdl, zfs_type_t type, nvlist_t *nvl,
 893     uint64_t zoned, zfs_handle_t *zhp, const char *errbuf)
 894 {
 895         nvpair_t *elem;
 896         uint64_t intval;
 897         char *strval;
 898         zfs_prop_t prop;
 899         nvlist_t *ret;
 900         int chosen_normal = -1;
 901         int chosen_utf = -1;
 902
 903         if (nvlist_alloc(&ret, NV_UNIQUE_NAME, 0) != 0) {
 904                 (void) no_memory(hdl);
 905                 return (NULL);
 906         }
 907
 908         /*
 909          * Make sure this property is valid and applies to this type.
 910          */
 911
 912         elem = NULL;
 913         while ((elem = nvlist_next_nvpair(nvl, elem)) != NULL) {
 914                 const char *propname = nvpair_name(elem);
 915
 916                 prop = zfs_name_to_prop(propname);
 917                 if (prop == ZPROP_INVAL && zfs_prop_user(propname)) {
 918                         /*
 919                          * This is a user property: make sure it's a
 920                          * string, and that it's less than ZAP_MAXNAMELEN.
 921                          */
 922                         if (nvpair_type(elem) != DATA_TYPE_STRING) {
 923                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 924                                     "'%s' must be a string"), propname);
 925                                 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
 926                                 goto error;
 927                         }
 928
 929                         if (strlen(nvpair_name(elem)) >= ZAP_MAXNAMELEN) {
 930                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 931                                     "property name '%s' is too long"),
 932                                     propname);
 933                                 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
 934                                 goto error;
 935                         }
 936
 937                         (void) nvpair_value_string(elem, &strval);
 938                         if (nvlist_add_string(ret, propname, strval) != 0) {
 939                                 (void) no_memory(hdl);
 940                                 goto error;
 941                         }
 942                         continue;
 943                 }
 944
 945                 /*
 946                  * Currently, only user properties can be modified on
 947                  * snapshots.
 948                  */
 949                 if (type == ZFS_TYPE_SNAPSHOT) {
 950                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 951                             "this property can not be modified for snapshots"));
 952                         (void) zfs_error(hdl, EZFS_PROPTYPE, errbuf);
 953                         goto error;
 954                 }
 955
 956                 if (prop == ZPROP_INVAL && zfs_prop_userquota(propname)) {
 957                         zfs_userquota_prop_t uqtype;
 958                         char newpropname[128];
 959                         char domain[128];
 960                         uint64_t rid;
 961                         uint64_t valary[3];
 962
 963                         if (userquota_propname_decode(propname, zoned,
 964                             &uqtype, domain, sizeof (domain), &rid) != 0) {
 965                                 zfs_error_aux(hdl,
 966                                     dgettext(TEXT_DOMAIN,
 967                                     "'%s' has an invalid user/group name"),
 968                                     propname);
 969                                 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
 970                                 goto error;
 971                         }
 972
 973                         if (uqtype != ZFS_PROP_USERQUOTA &&
 974                             uqtype != ZFS_PROP_GROUPQUOTA) {
 975                                 zfs_error_aux(hdl,
 976                                     dgettext(TEXT_DOMAIN, "'%s' is readonly"),
 977                                     propname);
 978                                 (void) zfs_error(hdl, EZFS_PROPREADONLY,
 979                                     errbuf);
 980                                 goto error;
 981                         }
 982
 983                         if (nvpair_type(elem) == DATA_TYPE_STRING) {
 984                                 (void) nvpair_value_string(elem, &strval);
 985                                 if (strcmp(strval, "none") == 0) {
 986                                         intval = 0;
 987                                 } else if (zfs_nicestrtonum(hdl,
 988                                     strval, &intval) != 0) {
 989                                         (void) zfs_error(hdl,
 990                                             EZFS_BADPROP, errbuf);
 991                                         goto error;
 992                                 }
 993                         } else if (nvpair_type(elem) ==
 994                             DATA_TYPE_UINT64) {
 995                                 (void) nvpair_value_uint64(elem, &intval);
 996                                 if (intval == 0) {
 997                                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 998                                             "use 'none' to disable "
 999                                             "userquota/groupquota"));
1000                                         goto error;
1001                                 }
1002                         } else {
1003                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1004                                     "'%s' must be a number"), propname);
1005                                 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1006                                 goto error;
1007                         }
1008
1009                         /*
1010                          * Encode the prop name as
1011                          * userquota@<hex-rid>-domain, to make it easy
1012                          * for the kernel to decode.
1013                          */
1014                         (void) snprintf(newpropname, sizeof (newpropname),
1015                             "%s%llx-%s", zfs_userquota_prop_prefixes[uqtype],
1016                             (longlong_t)rid, domain);
1017                         valary[0] = uqtype;
1018                         valary[1] = rid;
1019                         valary[2] = intval;
1020                         if (nvlist_add_uint64_array(ret, newpropname,
1021                             valary, 3) != 0) {
1022                                 (void) no_memory(hdl);
1023                                 goto error;
1024                         }
1025                         continue;
1026                 } else if (prop == ZPROP_INVAL && zfs_prop_written(propname)) {
1027                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1028                             "'%s' is readonly"),
1029                             propname);
1030                         (void) zfs_error(hdl, EZFS_PROPREADONLY, errbuf);
1031                         goto error;
1032                 }
1033
1034                 if (prop == ZPROP_INVAL) {
1035                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1036                             "invalid property '%s'"), propname);
1037                         (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1038                         goto error;
1039                 }
1040
1041                 if (!zfs_prop_valid_for_type(prop, type)) {
1042                         zfs_error_aux(hdl,
1043                             dgettext(TEXT_DOMAIN, "'%s' does not "
1044                             "apply to datasets of this type"), propname);
1045                         (void) zfs_error(hdl, EZFS_PROPTYPE, errbuf);
1046                         goto error;
1047                 }
1048
1049                 if (zfs_prop_readonly(prop) &&
1050                     (!zfs_prop_setonce(prop) || zhp != NULL)) {
1051                         zfs_error_aux(hdl,
1052                             dgettext(TEXT_DOMAIN, "'%s' is readonly"),
1053                             propname);
1054                         (void) zfs_error(hdl, EZFS_PROPREADONLY, errbuf);
1055                         goto error;
1056                 }
1057
1058                 if (zprop_parse_value(hdl, elem, prop, type, ret,
1059                     &strval, &intval, errbuf) != 0)
1060                         goto error;
1061
1062                 /*
1063                  * Perform some additional checks for specific properties.
1064                  */
1065                 switch (prop) {
1066                 case ZFS_PROP_VERSION:
1067                 {
1068                         int version;
1069
1070                         if (zhp == NULL)
1071                                 break;
1072                         version = zfs_prop_get_int(zhp, ZFS_PROP_VERSION);
1073                         if (intval < version) {
1074                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1075                                     "Can not downgrade; already at version %u"),
1076                                     version);
1077                                 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1078                                 goto error;
1079                         }
1080                         break;
1081                 }
1082
1083                 case ZFS_PROP_VOLBLOCKSIZE:
1084                 case ZFS_PROP_RECORDSIZE:
1085                 {
1086                         int maxbs = SPA_MAXBLOCKSIZE;
1087                         if (zhp != NULL) {
1088                                 maxbs = zpool_get_prop_int(zhp->zpool_hdl,
1089                                     ZPOOL_PROP_MAXBLOCKSIZE, NULL);
1090                         }
1091                         /*
1092                          * Volumes are limited to a volblocksize of 128KB,
1093                          * because they typically service workloads with
1094                          * small random writes, which incur a large performance
1095                          * penalty with large blocks.
1096                          */
1097                         if (prop == ZFS_PROP_VOLBLOCKSIZE)
1098                                 maxbs = SPA_OLD_MAXBLOCKSIZE;
1099                         /*
1100                          * The value must be a power of two between
1101                          * SPA_MINBLOCKSIZE and maxbs.
1102                          */
1103                         if (intval < SPA_MINBLOCKSIZE ||
1104                             intval > maxbs || !ISP2(intval)) {
1105                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1106                                     "'%s' must be power of 2 from 512B "
1107                                     "to %uKB"), propname, maxbs >> 10);
1108                                 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1109                                 goto error;
1110                         }
1111                         break;
1112                 }
1113                 case ZFS_PROP_MLSLABEL:
1114                 {
1115 #ifdef sun
1116                         /*
1117                          * Verify the mlslabel string and convert to
1118                          * internal hex label string.
1119                          */
1120
1121                         m_label_t *new_sl;
1122                         char *hex = NULL;       /* internal label string */
1123
1124                         /* Default value is already OK. */
1125                         if (strcasecmp(strval, ZFS_MLSLABEL_DEFAULT) == 0)
1126                                 break;
1127
1128                         /* Verify the label can be converted to binary form */
1129                         if (((new_sl = m_label_alloc(MAC_LABEL)) == NULL) ||
1130                             (str_to_label(strval, &new_sl, MAC_LABEL,
1131                             L_NO_CORRECTION, NULL) == -1)) {
1132                                 goto badlabel;
1133                         }
1134
1135                         /* Now translate to hex internal label string */
1136                         if (label_to_str(new_sl, &hex, M_INTERNAL,
1137                             DEF_NAMES) != 0) {
1138                                 if (hex)
1139                                         free(hex);
1140                                 goto badlabel;
1141                         }
1142                         m_label_free(new_sl);
1143
1144                         /* If string is already in internal form, we're done. */
1145                         if (strcmp(strval, hex) == 0) {
1146                                 free(hex);
1147                                 break;
1148                         }
1149
1150                         /* Replace the label string with the internal form. */
1151                         (void) nvlist_remove(ret, zfs_prop_to_name(prop),
1152                             DATA_TYPE_STRING);
1153                         verify(nvlist_add_string(ret, zfs_prop_to_name(prop),
1154                             hex) == 0);
1155                         free(hex);
1156
1157                         break;
1158
1159 badlabel:
1160                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1161                             "invalid mlslabel '%s'"), strval);
1162                         (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1163                         m_label_free(new_sl);   /* OK if null */
1164 #else   /* !sun */
1165                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1166                             "mlslabel is not supported on FreeBSD"));
1167                         (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1168 #endif  /* !sun */
1169                         goto error;
1170
1171                 }
1172
1173                 case ZFS_PROP_MOUNTPOINT:
1174                 {
1175                         namecheck_err_t why;
1176
1177                         if (strcmp(strval, ZFS_MOUNTPOINT_NONE) == 0 ||
1178                             strcmp(strval, ZFS_MOUNTPOINT_LEGACY) == 0)
1179                                 break;
1180
1181                         if (mountpoint_namecheck(strval, &why)) {
1182                                 switch (why) {
1183                                 case NAME_ERR_LEADING_SLASH:
1184                                         zfs_error_aux(hdl,
1185                                             dgettext(TEXT_DOMAIN,
1186                                             "'%s' must be an absolute path, "
1187                                             "'none', or 'legacy'"), propname);
1188                                         break;
1189                                 case NAME_ERR_TOOLONG:
1190                                         zfs_error_aux(hdl,
1191                                             dgettext(TEXT_DOMAIN,
1192                                             "component of '%s' is too long"),
1193                                             propname);
1194                                         break;
1195                                 }
1196                                 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1197                                 goto error;
1198                         }
1199                 }
1200
1201                         /*FALLTHRU*/
1202
1203                 case ZFS_PROP_SHARESMB:
1204                 case ZFS_PROP_SHARENFS:
1205                         /*
1206                          * For the mountpoint and sharenfs or sharesmb
1207                          * properties, check if it can be set in a
1208                          * global/non-global zone based on
1209                          * the zoned property value:
1210                          *
1211                          *              global zone         non-global zone
1212                          * --------------------------------------------------
1213                          * zoned=on     mountpoint (no)     mountpoint (yes)
1214                          *              sharenfs (no)       sharenfs (no)
1215                          *              sharesmb (no)       sharesmb (no)
1216                          *
1217                          * zoned=off    mountpoint (yes)        N/A
1218                          *              sharenfs (yes)
1219                          *              sharesmb (yes)
1220                          */
1221                         if (zoned) {
1222                                 if (getzoneid() == GLOBAL_ZONEID) {
1223                                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1224                                             "'%s' cannot be set on "
1225                                             "dataset in a non-global zone"),
1226                                             propname);
1227                                         (void) zfs_error(hdl, EZFS_ZONED,
1228                                             errbuf);
1229                                         goto error;
1230                                 } else if (prop == ZFS_PROP_SHARENFS ||
1231                                     prop == ZFS_PROP_SHARESMB) {
1232                                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1233                                             "'%s' cannot be set in "
1234                                             "a non-global zone"), propname);
1235                                         (void) zfs_error(hdl, EZFS_ZONED,
1236                                             errbuf);
1237                                         goto error;
1238                                 }
1239                         } else if (getzoneid() != GLOBAL_ZONEID) {
1240                                 /*
1241                                  * If zoned property is 'off', this must be in
1242                                  * a global zone. If not, something is wrong.
1243                                  */
1244                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1245                                     "'%s' cannot be set while dataset "
1246                                     "'zoned' property is set"), propname);
1247                                 (void) zfs_error(hdl, EZFS_ZONED, errbuf);
1248                                 goto error;
1249                         }
1250
1251                         /*
1252                          * At this point, it is legitimate to set the
1253                          * property. Now we want to make sure that the
1254                          * property value is valid if it is sharenfs.
1255                          */
1256                         if ((prop == ZFS_PROP_SHARENFS ||
1257                             prop == ZFS_PROP_SHARESMB) &&
1258                             strcmp(strval, "on") != 0 &&
1259                             strcmp(strval, "off") != 0) {
1260                                 zfs_share_proto_t proto;
1261
1262                                 if (prop == ZFS_PROP_SHARESMB)
1263                                         proto = PROTO_SMB;
1264                                 else
1265                                         proto = PROTO_NFS;
1266
1267                                 /*
1268                                  * Must be an valid sharing protocol
1269                                  * option string so init the libshare
1270                                  * in order to enable the parser and
1271                                  * then parse the options. We use the
1272                                  * control API since we don't care about
1273                                  * the current configuration and don't
1274                                  * want the overhead of loading it
1275                                  * until we actually do something.
1276                                  */
1277
1278                                 if (zfs_init_libshare(hdl,
1279                                     SA_INIT_CONTROL_API) != SA_OK) {
1280                                         /*
1281                                          * An error occurred so we can't do
1282                                          * anything
1283                                          */
1284                                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1285                                             "'%s' cannot be set: problem "
1286                                             "in share initialization"),
1287                                             propname);
1288                                         (void) zfs_error(hdl, EZFS_BADPROP,
1289                                             errbuf);
1290                                         goto error;
1291                                 }
1292
1293                                 if (zfs_parse_options(strval, proto) != SA_OK) {
1294                                         /*
1295                                          * There was an error in parsing so
1296                                          * deal with it by issuing an error
1297                                          * message and leaving after
1298                                          * uninitializing the the libshare
1299                                          * interface.
1300                                          */
1301                                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1302                                             "'%s' cannot be set to invalid "
1303                                             "options"), propname);
1304                                         (void) zfs_error(hdl, EZFS_BADPROP,
1305                                             errbuf);
1306                                         zfs_uninit_libshare(hdl);
1307                                         goto error;
1308                                 }
1309                                 zfs_uninit_libshare(hdl);
1310                         }
1311
1312                         break;
1313                 case ZFS_PROP_UTF8ONLY:
1314                         chosen_utf = (int)intval;
1315                         break;
1316                 case ZFS_PROP_NORMALIZE:
1317                         chosen_normal = (int)intval;
1318                         break;
1319                 }
1320
1321                 /*
1322                  * For changes to existing volumes, we have some additional
1323                  * checks to enforce.
1324                  */
1325                 if (type == ZFS_TYPE_VOLUME && zhp != NULL) {
1326                         uint64_t volsize = zfs_prop_get_int(zhp,
1327                             ZFS_PROP_VOLSIZE);
1328                         uint64_t blocksize = zfs_prop_get_int(zhp,
1329                             ZFS_PROP_VOLBLOCKSIZE);
1330                         char buf[64];
1331
1332                         switch (prop) {
1333                         case ZFS_PROP_RESERVATION:
1334                         case ZFS_PROP_REFRESERVATION:
1335                                 if (intval > volsize) {
1336                                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1337                                             "'%s' is greater than current "
1338                                             "volume size"), propname);
1339                                         (void) zfs_error(hdl, EZFS_BADPROP,
1340                                             errbuf);
1341                                         goto error;
1342                                 }
1343                                 break;
1344
1345                         case ZFS_PROP_VOLSIZE:
1346                                 if (intval % blocksize != 0) {
1347                                         zfs_nicenum(blocksize, buf,
1348                                             sizeof (buf));
1349                                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1350                                             "'%s' must be a multiple of "
1351                                             "volume block size (%s)"),
1352                                             propname, buf);
1353                                         (void) zfs_error(hdl, EZFS_BADPROP,
1354                                             errbuf);
1355                                         goto error;
1356                                 }
1357
1358                                 if (intval == 0) {
1359                                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1360                                             "'%s' cannot be zero"),
1361                                             propname);
1362                                         (void) zfs_error(hdl, EZFS_BADPROP,
1363                                             errbuf);
1364                                         goto error;
1365                                 }
1366                                 break;
1367                         }
1368                 }
1369         }
1370
1371         /*
1372          * If normalization was chosen, but no UTF8 choice was made,
1373          * enforce rejection of non-UTF8 names.
1374          *
1375          * If normalization was chosen, but rejecting non-UTF8 names
1376          * was explicitly not chosen, it is an error.
1377          */
1378         if (chosen_normal > 0 && chosen_utf < 0) {
1379                 if (nvlist_add_uint64(ret,
1380                     zfs_prop_to_name(ZFS_PROP_UTF8ONLY), 1) != 0) {
1381                         (void) no_memory(hdl);
1382                         goto error;
1383                 }
1384         } else if (chosen_normal > 0 && chosen_utf == 0) {
1385                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1386                     "'%s' must be set 'on' if normalization chosen"),
1387                     zfs_prop_to_name(ZFS_PROP_UTF8ONLY));
1388                 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1389                 goto error;
1390         }
1391         return (ret);
1392
1393 error:
1394         nvlist_free(ret);
1395         return (NULL);
1396 }
1397
1398 int
1399 zfs_add_synthetic_resv(zfs_handle_t *zhp, nvlist_t *nvl)
1400 {
1401         uint64_t old_volsize;
1402         uint64_t new_volsize;
1403         uint64_t old_reservation;
1404         uint64_t new_reservation;
1405         zfs_prop_t resv_prop;
1406         nvlist_t *props;
1407
1408         /*
1409          * If this is an existing volume, and someone is setting the volsize,
1410          * make sure that it matches the reservation, or add it if necessary.
1411          */
1412         old_volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE);
1413         if (zfs_which_resv_prop(zhp, &resv_prop) < 0)
1414                 return (-1);
1415         old_reservation = zfs_prop_get_int(zhp, resv_prop);
1416
1417         props = fnvlist_alloc();
1418         fnvlist_add_uint64(props, zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE),
1419             zfs_prop_get_int(zhp, ZFS_PROP_VOLBLOCKSIZE));
1420
1421         if ((zvol_volsize_to_reservation(old_volsize, props) !=
1422             old_reservation) || nvlist_exists(nvl,
1423             zfs_prop_to_name(resv_prop))) {
1424                 fnvlist_free(props);
1425                 return (0);
1426         }
1427         if (nvlist_lookup_uint64(nvl, zfs_prop_to_name(ZFS_PROP_VOLSIZE),
1428             &new_volsize) != 0) {
1429                 fnvlist_free(props);
1430                 return (-1);
1431         }
1432         new_reservation = zvol_volsize_to_reservation(new_volsize, props);
1433         fnvlist_free(props);
1434
1435         if (nvlist_add_uint64(nvl, zfs_prop_to_name(resv_prop),
1436             new_reservation) != 0) {
1437                 (void) no_memory(zhp->zfs_hdl);
1438                 return (-1);
1439         }
1440         return (1);
1441 }
1442
1443 void
1444 zfs_setprop_error(libzfs_handle_t *hdl, zfs_prop_t prop, int err,
1445     char *errbuf)
1446 {
1447         switch (err) {
1448
1449         case ENOSPC:
1450                 /*
1451                  * For quotas and reservations, ENOSPC indicates
1452                  * something different; setting a quota or reservation
1453                  * doesn't use any disk space.
1454                  */
1455                 switch (prop) {
1456                 case ZFS_PROP_QUOTA:
1457                 case ZFS_PROP_REFQUOTA:
1458                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1459                             "size is less than current used or "
1460                             "reserved space"));
1461                         (void) zfs_error(hdl, EZFS_PROPSPACE, errbuf);
1462                         break;
1463
1464                 case ZFS_PROP_RESERVATION:
1465                 case ZFS_PROP_REFRESERVATION:
1466                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1467                             "size is greater than available space"));
1468                         (void) zfs_error(hdl, EZFS_PROPSPACE, errbuf);
1469                         break;
1470
1471                 default:
1472                         (void) zfs_standard_error(hdl, err, errbuf);
1473                         break;
1474                 }
1475                 break;
1476
1477         case EBUSY:
1478                 (void) zfs_standard_error(hdl, EBUSY, errbuf);
1479                 break;
1480
1481         case EROFS:
1482                 (void) zfs_error(hdl, EZFS_DSREADONLY, errbuf);
1483                 break;
1484
1485         case ENOTSUP:
1486                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1487                     "pool and or dataset must be upgraded to set this "
1488                     "property or value"));
1489                 (void) zfs_error(hdl, EZFS_BADVERSION, errbuf);
1490                 break;
1491
1492         case ERANGE:
1493         case EDOM:
1494                 if (prop == ZFS_PROP_COMPRESSION ||
1495                     prop == ZFS_PROP_RECORDSIZE) {
1496                         (void) zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1497                             "property setting is not allowed on "
1498                             "bootable datasets"));
1499                         (void) zfs_error(hdl, EZFS_NOTSUP, errbuf);
1500                 } else if (prop == ZFS_PROP_CHECKSUM ||
1501                     prop == ZFS_PROP_DEDUP) {
1502                         (void) zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1503                             "property setting is not allowed on "
1504                             "root pools"));
1505                         (void) zfs_error(hdl, EZFS_NOTSUP, errbuf);
1506                 } else {
1507                         (void) zfs_standard_error(hdl, err, errbuf);
1508                 }
1509                 break;
1510
1511         case EINVAL:
1512                 if (prop == ZPROP_INVAL) {
1513                         (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1514                 } else {
1515                         (void) zfs_standard_error(hdl, err, errbuf);
1516                 }
1517                 break;
1518
1519         case EOVERFLOW:
1520                 /*
1521                  * This platform can't address a volume this big.
1522                  */
1523 #ifdef _ILP32
1524                 if (prop == ZFS_PROP_VOLSIZE) {
1525                         (void) zfs_error(hdl, EZFS_VOLTOOBIG, errbuf);
1526                         break;
1527                 }
1528 #endif
1529                 /* FALLTHROUGH */
1530         default:
1531                 (void) zfs_standard_error(hdl, err, errbuf);
1532         }
1533 }
1534
1535 /*
1536  * Given a property name and value, set the property for the given dataset.
1537  */
1538 int
1539 zfs_prop_set(zfs_handle_t *zhp, const char *propname, const char *propval)
1540 {
1541         int ret = -1;
1542         char errbuf[1024];
1543         libzfs_handle_t *hdl = zhp->zfs_hdl;
1544         nvlist_t *nvl = NULL;
1545
1546         (void) snprintf(errbuf, sizeof (errbuf),
1547             dgettext(TEXT_DOMAIN, "cannot set property for '%s'"),
1548             zhp->zfs_name);
1549
1550         if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0) != 0 ||
1551             nvlist_add_string(nvl, propname, propval) != 0) {
1552                 (void) no_memory(hdl);
1553                 goto error;
1554         }
1555
1556         ret = zfs_prop_set_list(zhp, nvl);
1557
1558 error:
1559         nvlist_free(nvl);
1560         return (ret);
1561 }
1562
1563
1564
1565 /*
1566  * Given an nvlist of property names and values, set the properties for the
1567  * given dataset.
1568  */
1569 int
1570 zfs_prop_set_list(zfs_handle_t *zhp, nvlist_t *props)
1571 {
1572         zfs_cmd_t zc = { 0 };
1573         int ret = -1;
1574         prop_changelist_t **cls = NULL;
1575         int cl_idx;
1576         char errbuf[1024];
1577         libzfs_handle_t *hdl = zhp->zfs_hdl;
1578         nvlist_t *nvl;
1579         int nvl_len;
1580         int added_resv;
1581
1582         (void) snprintf(errbuf, sizeof (errbuf),
1583             dgettext(TEXT_DOMAIN, "cannot set property for '%s'"),
1584             zhp->zfs_name);
1585
1586         if ((nvl = zfs_valid_proplist(hdl, zhp->zfs_type, props,
1587             zfs_prop_get_int(zhp, ZFS_PROP_ZONED), zhp, errbuf)) == NULL)
1588                 goto error;
1589
1590         /*
1591          * We have to check for any extra properties which need to be added
1592          * before computing the length of the nvlist.
1593          */
1594         for (nvpair_t *elem = nvlist_next_nvpair(nvl, NULL);
1595             elem != NULL;
1596             elem = nvlist_next_nvpair(nvl, elem)) {
1597                 if (zfs_name_to_prop(nvpair_name(elem)) == ZFS_PROP_VOLSIZE &&
1598                     (added_resv = zfs_add_synthetic_resv(zhp, nvl)) == -1) {
1599                         goto error;
1600                 }
1601         }
1602         /*
1603          * Check how many properties we're setting and allocate an array to
1604          * store changelist pointers for postfix().
1605          */
1606         nvl_len = 0;
1607         for (nvpair_t *elem = nvlist_next_nvpair(nvl, NULL);
1608             elem != NULL;
1609             elem = nvlist_next_nvpair(nvl, elem))
1610                 nvl_len++;
1611         if ((cls = calloc(nvl_len, sizeof (prop_changelist_t *))) == NULL)
1612                 goto error;
1613
1614         cl_idx = 0;
1615         for (nvpair_t *elem = nvlist_next_nvpair(nvl, NULL);
1616             elem != NULL;
1617             elem = nvlist_next_nvpair(nvl, elem)) {
1618
1619                 zfs_prop_t prop = zfs_name_to_prop(nvpair_name(elem));
1620
1621                 assert(cl_idx < nvl_len);
1622                 /*
1623                  * We don't want to unmount & remount the dataset when changing
1624                  * its canmount property to 'on' or 'noauto'.  We only use
1625                  * the changelist logic to unmount when setting canmount=off.
1626                  */
1627                 if (!(prop == ZFS_PROP_CANMOUNT &&
1628                     fnvpair_value_uint64(elem) != ZFS_CANMOUNT_OFF)) {
1629                         cls[cl_idx] = changelist_gather(zhp, prop, 0, 0);
1630                         if (cls[cl_idx] == NULL)
1631                                 goto error;
1632                 }
1633
1634                 if (prop == ZFS_PROP_MOUNTPOINT &&
1635                     changelist_haszonedchild(cls[cl_idx])) {
1636                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1637                             "child dataset with inherited mountpoint is used "
1638                             "in a non-global zone"));
1639                         ret = zfs_error(hdl, EZFS_ZONED, errbuf);
1640                         goto error;
1641                 }
1642
1643                 /* We don't support those properties on FreeBSD. */
1644                 switch (prop) {
1645                 case ZFS_PROP_DEVICES:
1646                 case ZFS_PROP_ISCSIOPTIONS:
1647                 case ZFS_PROP_XATTR:
1648                 case ZFS_PROP_VSCAN:
1649                 case ZFS_PROP_NBMAND:
1650                 case ZFS_PROP_MLSLABEL:
1651                         (void) snprintf(errbuf, sizeof (errbuf),
1652                             "property '%s' not supported on FreeBSD",
1653                             nvpair_name(elem));
1654                         ret = zfs_error(hdl, EZFS_PERM, errbuf);
1655                         goto error;
1656                 }
1657
1658                 if (cls[cl_idx] != NULL &&
1659                     (ret = changelist_prefix(cls[cl_idx])) != 0)
1660                         goto error;
1661
1662                 cl_idx++;
1663         }
1664         assert(cl_idx == nvl_len);
1665
1666         /*
1667          * Execute the corresponding ioctl() to set this list of properties.
1668          */
1669         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
1670
1671         if ((ret = zcmd_write_src_nvlist(hdl, &zc, nvl)) != 0 ||
1672             (ret = zcmd_alloc_dst_nvlist(hdl, &zc, 0)) != 0)
1673                 goto error;
1674
1675         ret = zfs_ioctl(hdl, ZFS_IOC_SET_PROP, &zc);
1676
1677         if (ret != 0) {
1678                 /* Get the list of unset properties back and report them. */
1679                 nvlist_t *errorprops = NULL;
1680                 if (zcmd_read_dst_nvlist(hdl, &zc, &errorprops) != 0)
1681                         goto error;
1682                 for (nvpair_t *elem = nvlist_next_nvpair(nvl, NULL);
1683                     elem != NULL;
1684                     elem = nvlist_next_nvpair(nvl, elem)) {
1685                         zfs_prop_t prop = zfs_name_to_prop(nvpair_name(elem));
1686                         zfs_setprop_error(hdl, prop, errno, errbuf);
1687                 }
1688                 nvlist_free(errorprops);
1689
1690                 if (added_resv && errno == ENOSPC) {
1691                         /* clean up the volsize property we tried to set */
1692                         uint64_t old_volsize = zfs_prop_get_int(zhp,
1693                             ZFS_PROP_VOLSIZE);
1694                         nvlist_free(nvl);
1695                         nvl = NULL;
1696                         zcmd_free_nvlists(&zc);
1697
1698                         if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0) != 0)
1699                                 goto error;
1700                         if (nvlist_add_uint64(nvl,
1701                             zfs_prop_to_name(ZFS_PROP_VOLSIZE),
1702                             old_volsize) != 0)
1703                                 goto error;
1704                         if (zcmd_write_src_nvlist(hdl, &zc, nvl) != 0)
1705                                 goto error;
1706                         (void) zfs_ioctl(hdl, ZFS_IOC_SET_PROP, &zc);
1707                 }
1708         } else {
1709                 for (cl_idx = 0; cl_idx < nvl_len; cl_idx++) {
1710                         if (cls[cl_idx] != NULL) {
1711                                 int clp_err = changelist_postfix(cls[cl_idx]);
1712                                 if (clp_err != 0)
1713                                         ret = clp_err;
1714                         }
1715                 }
1716
1717                 /*
1718                  * Refresh the statistics so the new property value
1719                  * is reflected.
1720                  */
1721                 if (ret == 0)
1722                         (void) get_stats(zhp);
1723         }
1724
1725 error:
1726         nvlist_free(nvl);
1727         zcmd_free_nvlists(&zc);
1728         if (cls != NULL) {
1729                 for (cl_idx = 0; cl_idx < nvl_len; cl_idx++) {
1730                         if (cls[cl_idx] != NULL)
1731                                 changelist_free(cls[cl_idx]);
1732                 }
1733                 free(cls);
1734         }
1735         return (ret);
1736 }
1737
1738 /*
1739  * Given a property, inherit the value from the parent dataset, or if received
1740  * is TRUE, revert to the received value, if any.
1741  */
1742 int
1743 zfs_prop_inherit(zfs_handle_t *zhp, const char *propname, boolean_t received)
1744 {
1745         zfs_cmd_t zc = { 0 };
1746         int ret;
1747         prop_changelist_t *cl;
1748         libzfs_handle_t *hdl = zhp->zfs_hdl;
1749         char errbuf[1024];
1750         zfs_prop_t prop;
1751
1752         (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
1753             "cannot inherit %s for '%s'"), propname, zhp->zfs_name);
1754
1755         zc.zc_cookie = received;
1756         if ((prop = zfs_name_to_prop(propname)) == ZPROP_INVAL) {
1757                 /*
1758                  * For user properties, the amount of work we have to do is very
1759                  * small, so just do it here.
1760                  */
1761                 if (!zfs_prop_user(propname)) {
1762                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1763                             "invalid property"));
1764                         return (zfs_error(hdl, EZFS_BADPROP, errbuf));
1765                 }
1766
1767                 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
1768                 (void) strlcpy(zc.zc_value, propname, sizeof (zc.zc_value));
1769
1770                 if (zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_INHERIT_PROP, &zc) != 0)
1771                         return (zfs_standard_error(hdl, errno, errbuf));
1772
1773                 return (0);
1774         }
1775
1776         /*
1777          * Verify that this property is inheritable.
1778          */
1779         if (zfs_prop_readonly(prop))
1780                 return (zfs_error(hdl, EZFS_PROPREADONLY, errbuf));
1781
1782         if (!zfs_prop_inheritable(prop) && !received)
1783                 return (zfs_error(hdl, EZFS_PROPNONINHERIT, errbuf));
1784
1785         /*
1786          * Check to see if the value applies to this type
1787          */
1788         if (!zfs_prop_valid_for_type(prop, zhp->zfs_type))
1789                 return (zfs_error(hdl, EZFS_PROPTYPE, errbuf));
1790
1791         /*
1792          * Normalize the name, to get rid of shorthand abbreviations.
1793          */
1794         propname = zfs_prop_to_name(prop);
1795         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
1796         (void) strlcpy(zc.zc_value, propname, sizeof (zc.zc_value));
1797
1798         if (prop == ZFS_PROP_MOUNTPOINT && getzoneid() == GLOBAL_ZONEID &&
1799             zfs_prop_get_int(zhp, ZFS_PROP_ZONED)) {
1800                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1801                     "dataset is used in a non-global zone"));
1802                 return (zfs_error(hdl, EZFS_ZONED, errbuf));
1803         }
1804
1805         /*
1806          * Determine datasets which will be affected by this change, if any.
1807          */
1808         if ((cl = changelist_gather(zhp, prop, 0, 0)) == NULL)
1809                 return (-1);
1810
1811         if (prop == ZFS_PROP_MOUNTPOINT && changelist_haszonedchild(cl)) {
1812                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1813                     "child dataset with inherited mountpoint is used "
1814                     "in a non-global zone"));
1815                 ret = zfs_error(hdl, EZFS_ZONED, errbuf);
1816                 goto error;
1817         }
1818
1819         if ((ret = changelist_prefix(cl)) != 0)
1820                 goto error;
1821
1822         if ((ret = zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_INHERIT_PROP, &zc)) != 0) {
1823                 return (zfs_standard_error(hdl, errno, errbuf));
1824         } else {
1825
1826                 if ((ret = changelist_postfix(cl)) != 0)
1827                         goto error;
1828
1829                 /*
1830                  * Refresh the statistics so the new property is reflected.
1831                  */
1832                 (void) get_stats(zhp);
1833         }
1834
1835 error:
1836         changelist_free(cl);
1837         return (ret);
1838 }
1839
1840 /*
1841  * True DSL properties are stored in an nvlist.  The following two functions
1842  * extract them appropriately.
1843  */
1844 static uint64_t
1845 getprop_uint64(zfs_handle_t *zhp, zfs_prop_t prop, char **source)
1846 {
1847         nvlist_t *nv;
1848         uint64_t value;
1849
1850         *source = NULL;
1851         if (nvlist_lookup_nvlist(zhp->zfs_props,
1852             zfs_prop_to_name(prop), &nv) == 0) {
1853                 verify(nvlist_lookup_uint64(nv, ZPROP_VALUE, &value) == 0);
1854                 (void) nvlist_lookup_string(nv, ZPROP_SOURCE, source);
1855         } else {
1856                 verify(!zhp->zfs_props_table ||
1857                     zhp->zfs_props_table[prop] == B_TRUE);
1858                 value = zfs_prop_default_numeric(prop);
1859                 *source = "";
1860         }
1861
1862         return (value);
1863 }
1864
1865 static const char *
1866 getprop_string(zfs_handle_t *zhp, zfs_prop_t prop, char **source)
1867 {
1868         nvlist_t *nv;
1869         const char *value;
1870
1871         *source = NULL;
1872         if (nvlist_lookup_nvlist(zhp->zfs_props,
1873             zfs_prop_to_name(prop), &nv) == 0) {
1874                 value = fnvlist_lookup_string(nv, ZPROP_VALUE);
1875                 (void) nvlist_lookup_string(nv, ZPROP_SOURCE, source);
1876         } else {
1877                 verify(!zhp->zfs_props_table ||
1878                     zhp->zfs_props_table[prop] == B_TRUE);
1879                 value = zfs_prop_default_string(prop);
1880                 *source = "";
1881         }
1882
1883         return (value);
1884 }
1885
1886 static boolean_t
1887 zfs_is_recvd_props_mode(zfs_handle_t *zhp)
1888 {
1889         return (zhp->zfs_props == zhp->zfs_recvd_props);
1890 }
1891
1892 static void
1893 zfs_set_recvd_props_mode(zfs_handle_t *zhp, uint64_t *cookie)
1894 {
1895         *cookie = (uint64_t)(uintptr_t)zhp->zfs_props;
1896         zhp->zfs_props = zhp->zfs_recvd_props;
1897 }
1898
1899 static void
1900 zfs_unset_recvd_props_mode(zfs_handle_t *zhp, uint64_t *cookie)
1901 {
1902         zhp->zfs_props = (nvlist_t *)(uintptr_t)*cookie;
1903         *cookie = 0;
1904 }
1905
1906 /*
1907  * Internal function for getting a numeric property.  Both zfs_prop_get() and
1908  * zfs_prop_get_int() are built using this interface.
1909  *
1910  * Certain properties can be overridden using 'mount -o'.  In this case, scan
1911  * the contents of the /etc/mnttab entry, searching for the appropriate options.
1912  * If they differ from the on-disk values, report the current values and mark
1913  * the source "temporary".
1914  */
1915 static int
1916 get_numeric_property(zfs_handle_t *zhp, zfs_prop_t prop, zprop_source_t *src,
1917     char **source, uint64_t *val)
1918 {
1919         zfs_cmd_t zc = { 0 };
1920         nvlist_t *zplprops = NULL;
1921         struct mnttab mnt;
1922         char *mntopt_on = NULL;
1923         char *mntopt_off = NULL;
1924         boolean_t received = zfs_is_recvd_props_mode(zhp);
1925
1926         *source = NULL;
1927
1928         switch (prop) {
1929         case ZFS_PROP_ATIME:
1930                 mntopt_on = MNTOPT_ATIME;
1931                 mntopt_off = MNTOPT_NOATIME;
1932                 break;
1933
1934         case ZFS_PROP_DEVICES:
1935                 mntopt_on = MNTOPT_DEVICES;
1936                 mntopt_off = MNTOPT_NODEVICES;
1937                 break;
1938
1939         case ZFS_PROP_EXEC:
1940                 mntopt_on = MNTOPT_EXEC;
1941                 mntopt_off = MNTOPT_NOEXEC;
1942                 break;
1943
1944         case ZFS_PROP_READONLY:
1945                 mntopt_on = MNTOPT_RO;
1946                 mntopt_off = MNTOPT_RW;
1947                 break;
1948
1949         case ZFS_PROP_SETUID:
1950                 mntopt_on = MNTOPT_SETUID;
1951                 mntopt_off = MNTOPT_NOSETUID;
1952                 break;
1953
1954         case ZFS_PROP_XATTR:
1955                 mntopt_on = MNTOPT_XATTR;
1956                 mntopt_off = MNTOPT_NOXATTR;
1957                 break;
1958
1959         case ZFS_PROP_NBMAND:
1960                 mntopt_on = MNTOPT_NBMAND;
1961                 mntopt_off = MNTOPT_NONBMAND;
1962                 break;
1963         }
1964
1965         /*
1966          * Because looking up the mount options is potentially expensive
1967          * (iterating over all of /etc/mnttab), we defer its calculation until
1968          * we're looking up a property which requires its presence.
1969          */
1970         if (!zhp->zfs_mntcheck &&
1971             (mntopt_on != NULL || prop == ZFS_PROP_MOUNTED)) {
1972                 libzfs_handle_t *hdl = zhp->zfs_hdl;
1973                 struct mnttab entry;
1974
1975                 if (libzfs_mnttab_find(hdl, zhp->zfs_name, &entry) == 0) {
1976                         zhp->zfs_mntopts = zfs_strdup(hdl,
1977                             entry.mnt_mntopts);
1978                         if (zhp->zfs_mntopts == NULL)
1979                                 return (-1);
1980                 }
1981
1982                 zhp->zfs_mntcheck = B_TRUE;
1983         }
1984
1985         if (zhp->zfs_mntopts == NULL)
1986                 mnt.mnt_mntopts = "";
1987         else
1988                 mnt.mnt_mntopts = zhp->zfs_mntopts;
1989
1990         switch (prop) {
1991         case ZFS_PROP_ATIME:
1992         case ZFS_PROP_DEVICES:
1993         case ZFS_PROP_EXEC:
1994         case ZFS_PROP_READONLY:
1995         case ZFS_PROP_SETUID:
1996         case ZFS_PROP_XATTR:
1997         case ZFS_PROP_NBMAND:
1998                 *val = getprop_uint64(zhp, prop, source);
1999
2000                 if (received)
2001                         break;
2002
2003                 if (hasmntopt(&mnt, mntopt_on) && !*val) {
2004                         *val = B_TRUE;
2005                         if (src)
2006                                 *src = ZPROP_SRC_TEMPORARY;
2007                 } else if (hasmntopt(&mnt, mntopt_off) && *val) {
2008                         *val = B_FALSE;
2009                         if (src)
2010                                 *src = ZPROP_SRC_TEMPORARY;
2011                 }
2012                 break;
2013
2014         case ZFS_PROP_CANMOUNT:
2015         case ZFS_PROP_VOLSIZE:
2016         case ZFS_PROP_QUOTA:
2017         case ZFS_PROP_REFQUOTA:
2018         case ZFS_PROP_RESERVATION:
2019         case ZFS_PROP_REFRESERVATION:
2020         case ZFS_PROP_FILESYSTEM_LIMIT:
2021         case ZFS_PROP_SNAPSHOT_LIMIT:
2022         case ZFS_PROP_FILESYSTEM_COUNT:
2023         case ZFS_PROP_SNAPSHOT_COUNT:
2024                 *val = getprop_uint64(zhp, prop, source);
2025
2026                 if (*source == NULL) {
2027                         /* not default, must be local */
2028                         *source = zhp->zfs_name;
2029                 }
2030                 break;
2031
2032         case ZFS_PROP_MOUNTED:
2033                 *val = (zhp->zfs_mntopts != NULL);
2034                 break;
2035
2036         case ZFS_PROP_NUMCLONES:
2037                 *val = zhp->zfs_dmustats.dds_num_clones;
2038                 break;
2039
2040         case ZFS_PROP_VERSION:
2041         case ZFS_PROP_NORMALIZE:
2042         case ZFS_PROP_UTF8ONLY:
2043         case ZFS_PROP_CASE:
2044                 if (!zfs_prop_valid_for_type(prop, zhp->zfs_head_type) ||
2045                     zcmd_alloc_dst_nvlist(zhp->zfs_hdl, &zc, 0) != 0)
2046                         return (-1);
2047                 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
2048                 if (zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_OBJSET_ZPLPROPS, &zc)) {
2049                         zcmd_free_nvlists(&zc);
2050                         return (-1);
2051                 }
2052                 if (zcmd_read_dst_nvlist(zhp->zfs_hdl, &zc, &zplprops) != 0 ||
2053                     nvlist_lookup_uint64(zplprops, zfs_prop_to_name(prop),
2054                     val) != 0) {
2055                         zcmd_free_nvlists(&zc);
2056                         return (-1);
2057                 }
2058                 if (zplprops)
2059                         nvlist_free(zplprops);
2060                 zcmd_free_nvlists(&zc);
2061                 break;
2062
2063         case ZFS_PROP_INCONSISTENT:
2064                 *val = zhp->zfs_dmustats.dds_inconsistent;
2065                 break;
2066
2067         default:
2068                 switch (zfs_prop_get_type(prop)) {
2069                 case PROP_TYPE_NUMBER:
2070                 case PROP_TYPE_INDEX:
2071                         *val = getprop_uint64(zhp, prop, source);
2072                         /*
2073                          * If we tried to use a default value for a
2074                          * readonly property, it means that it was not
2075                          * present.
2076                          */
2077                         if (zfs_prop_readonly(prop) &&
2078                             *source != NULL && (*source)[0] == '\0') {
2079                                 *source = NULL;
2080                         }
2081                         break;
2082
2083                 case PROP_TYPE_STRING:
2084                 default:
2085                         zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN,
2086                             "cannot get non-numeric property"));
2087                         return (zfs_error(zhp->zfs_hdl, EZFS_BADPROP,
2088                             dgettext(TEXT_DOMAIN, "internal error")));
2089                 }
2090         }
2091
2092         return (0);
2093 }
2094
2095 /*
2096  * Calculate the source type, given the raw source string.
2097  */
2098 static void
2099 get_source(zfs_handle_t *zhp, zprop_source_t *srctype, char *source,
2100     char *statbuf, size_t statlen)
2101 {
2102         if (statbuf == NULL || *srctype == ZPROP_SRC_TEMPORARY)
2103                 return;
2104
2105         if (source == NULL) {
2106                 *srctype = ZPROP_SRC_NONE;
2107         } else if (source[0] == '\0') {
2108                 *srctype = ZPROP_SRC_DEFAULT;
2109         } else if (strstr(source, ZPROP_SOURCE_VAL_RECVD) != NULL) {
2110                 *srctype = ZPROP_SRC_RECEIVED;
2111         } else {
2112                 if (strcmp(source, zhp->zfs_name) == 0) {
2113                         *srctype = ZPROP_SRC_LOCAL;
2114                 } else {
2115                         (void) strlcpy(statbuf, source, statlen);
2116                         *srctype = ZPROP_SRC_INHERITED;
2117                 }
2118         }
2119
2120 }
2121
2122 int
2123 zfs_prop_get_recvd(zfs_handle_t *zhp, const char *propname, char *propbuf,
2124     size_t proplen, boolean_t literal)
2125 {
2126         zfs_prop_t prop;
2127         int err = 0;
2128
2129         if (zhp->zfs_recvd_props == NULL)
2130                 if (get_recvd_props_ioctl(zhp) != 0)
2131                         return (-1);
2132
2133         prop = zfs_name_to_prop(propname);
2134
2135         if (prop != ZPROP_INVAL) {
2136                 uint64_t cookie;
2137                 if (!nvlist_exists(zhp->zfs_recvd_props, propname))
2138                         return (-1);
2139                 zfs_set_recvd_props_mode(zhp, &cookie);
2140                 err = zfs_prop_get(zhp, prop, propbuf, proplen,
2141                     NULL, NULL, 0, literal);
2142                 zfs_unset_recvd_props_mode(zhp, &cookie);
2143         } else {
2144                 nvlist_t *propval;
2145                 char *recvdval;
2146                 if (nvlist_lookup_nvlist(zhp->zfs_recvd_props,
2147                     propname, &propval) != 0)
2148                         return (-1);
2149                 verify(nvlist_lookup_string(propval, ZPROP_VALUE,
2150                     &recvdval) == 0);
2151                 (void) strlcpy(propbuf, recvdval, proplen);
2152         }
2153
2154         return (err == 0 ? 0 : -1);
2155 }
2156
2157 static int
2158 get_clones_string(zfs_handle_t *zhp, char *propbuf, size_t proplen)
2159 {
2160         nvlist_t *value;
2161         nvpair_t *pair;
2162
2163         value = zfs_get_clones_nvl(zhp);
2164         if (value == NULL)
2165                 return (-1);
2166
2167         propbuf[0] = '\0';
2168         for (pair = nvlist_next_nvpair(value, NULL); pair != NULL;
2169             pair = nvlist_next_nvpair(value, pair)) {
2170                 if (propbuf[0] != '\0')
2171                         (void) strlcat(propbuf, ",", proplen);
2172                 (void) strlcat(propbuf, nvpair_name(pair), proplen);
2173         }
2174
2175         return (0);
2176 }
2177
2178 struct get_clones_arg {
2179         uint64_t numclones;
2180         nvlist_t *value;
2181         const char *origin;
2182         char buf[ZFS_MAXNAMELEN];
2183 };
2184
2185 int
2186 get_clones_cb(zfs_handle_t *zhp, void *arg)
2187 {
2188         struct get_clones_arg *gca = arg;
2189
2190         if (gca->numclones == 0) {
2191                 zfs_close(zhp);
2192                 return (0);
2193         }
2194
2195         if (zfs_prop_get(zhp, ZFS_PROP_ORIGIN, gca->buf, sizeof (gca->buf),
2196             NULL, NULL, 0, B_TRUE) != 0)
2197                 goto out;
2198         if (strcmp(gca->buf, gca->origin) == 0) {
2199                 fnvlist_add_boolean(gca->value, zfs_get_name(zhp));
2200                 gca->numclones--;
2201         }
2202
2203 out:
2204         (void) zfs_iter_children(zhp, get_clones_cb, gca);
2205         zfs_close(zhp);
2206         return (0);
2207 }
2208
2209 nvlist_t *
2210 zfs_get_clones_nvl(zfs_handle_t *zhp)
2211 {
2212         nvlist_t *nv, *value;
2213
2214         if (nvlist_lookup_nvlist(zhp->zfs_props,
2215             zfs_prop_to_name(ZFS_PROP_CLONES), &nv) != 0) {
2216                 struct get_clones_arg gca;
2217
2218                 /*
2219                  * if this is a snapshot, then the kernel wasn't able
2220                  * to get the clones.  Do it by slowly iterating.
2221                  */
2222                 if (zhp->zfs_type != ZFS_TYPE_SNAPSHOT)
2223                         return (NULL);
2224                 if (nvlist_alloc(&nv, NV_UNIQUE_NAME, 0) != 0)
2225                         return (NULL);
2226                 if (nvlist_alloc(&value, NV_UNIQUE_NAME, 0) != 0) {
2227                         nvlist_free(nv);
2228                         return (NULL);
2229                 }
2230
2231                 gca.numclones = zfs_prop_get_int(zhp, ZFS_PROP_NUMCLONES);
2232                 gca.value = value;
2233                 gca.origin = zhp->zfs_name;
2234
2235                 if (gca.numclones != 0) {
2236                         zfs_handle_t *root;
2237                         char pool[ZFS_MAXNAMELEN];
2238                         char *cp = pool;
2239
2240                         /* get the pool name */
2241                         (void) strlcpy(pool, zhp->zfs_name, sizeof (pool));
2242                         (void) strsep(&cp, "/@");
2243                         root = zfs_open(zhp->zfs_hdl, pool,
2244                             ZFS_TYPE_FILESYSTEM);
2245
2246                         (void) get_clones_cb(root, &gca);
2247                 }
2248
2249                 if (gca.numclones != 0 ||
2250                     nvlist_add_nvlist(nv, ZPROP_VALUE, value) != 0 ||
2251                     nvlist_add_nvlist(zhp->zfs_props,
2252                     zfs_prop_to_name(ZFS_PROP_CLONES), nv) != 0) {
2253                         nvlist_free(nv);
2254                         nvlist_free(value);
2255                         return (NULL);
2256                 }
2257                 nvlist_free(nv);
2258                 nvlist_free(value);
2259                 verify(0 == nvlist_lookup_nvlist(zhp->zfs_props,
2260                     zfs_prop_to_name(ZFS_PROP_CLONES), &nv));
2261         }
2262
2263         verify(nvlist_lookup_nvlist(nv, ZPROP_VALUE, &value) == 0);
2264
2265         return (value);
2266 }
2267
2268 /*
2269  * Retrieve a property from the given object.  If 'literal' is specified, then
2270  * numbers are left as exact values.  Otherwise, numbers are converted to a
2271  * human-readable form.
2272  *
2273  * Returns 0 on success, or -1 on error.
2274  */
2275 int
2276 zfs_prop_get(zfs_handle_t *zhp, zfs_prop_t prop, char *propbuf, size_t proplen,
2277     zprop_source_t *src, char *statbuf, size_t statlen, boolean_t literal)
2278 {
2279         char *source = NULL;
2280         uint64_t val;
2281         const char *str;
2282         const char *strval;
2283         boolean_t received = zfs_is_recvd_props_mode(zhp);
2284
2285         /*
2286          * Check to see if this property applies to our object
2287          */
2288         if (!zfs_prop_valid_for_type(prop, zhp->zfs_type))
2289                 return (-1);
2290
2291         if (received && zfs_prop_readonly(prop))
2292                 return (-1);
2293
2294         if (src)
2295                 *src = ZPROP_SRC_NONE;
2296
2297         switch (prop) {
2298         case ZFS_PROP_CREATION:
2299                 /*
2300                  * 'creation' is a time_t stored in the statistics.  We convert
2301                  * this into a string unless 'literal' is specified.
2302                  */
2303                 {
2304                         val = getprop_uint64(zhp, prop, &source);
2305                         time_t time = (time_t)val;
2306                         struct tm t;
2307
2308                         if (literal ||
2309                             localtime_r(&time, &t) == NULL ||
2310                             strftime(propbuf, proplen, "%a %b %e %k:%M %Y",
2311                             &t) == 0)
2312                                 (void) snprintf(propbuf, proplen, "%llu", val);
2313                 }
2314                 break;
2315
2316         case ZFS_PROP_MOUNTPOINT:
2317                 /*
2318                  * Getting the precise mountpoint can be tricky.
2319                  *
2320                  *  - for 'none' or 'legacy', return those values.
2321                  *  - for inherited mountpoints, we want to take everything
2322                  *    after our ancestor and append it to the inherited value.
2323                  *
2324                  * If the pool has an alternate root, we want to prepend that
2325                  * root to any values we return.
2326                  */
2327
2328                 str = getprop_string(zhp, prop, &source);
2329
2330                 if (str[0] == '/') {
2331                         char buf[MAXPATHLEN];
2332                         char *root = buf;
2333                         const char *relpath;
2334
2335                         /*
2336                          * If we inherit the mountpoint, even from a dataset
2337                          * with a received value, the source will be the path of
2338                          * the dataset we inherit from. If source is
2339                          * ZPROP_SOURCE_VAL_RECVD, the received value is not
2340                          * inherited.
2341                          */
2342                         if (strcmp(source, ZPROP_SOURCE_VAL_RECVD) == 0) {
2343                                 relpath = "";
2344                         } else {
2345                                 relpath = zhp->zfs_name + strlen(source);
2346                                 if (relpath[0] == '/')
2347                                         relpath++;
2348                         }
2349
2350                         if ((zpool_get_prop(zhp->zpool_hdl,
2351                             ZPOOL_PROP_ALTROOT, buf, MAXPATHLEN, NULL,
2352                             B_FALSE)) || (strcmp(root, "-") == 0))
2353                                 root[0] = '\0';
2354                         /*
2355                          * Special case an alternate root of '/'. This will
2356                          * avoid having multiple leading slashes in the
2357                          * mountpoint path.
2358                          */
2359                         if (strcmp(root, "/") == 0)
2360                                 root++;
2361
2362                         /*
2363                          * If the mountpoint is '/' then skip over this
2364                          * if we are obtaining either an alternate root or
2365                          * an inherited mountpoint.
2366                          */
2367                         if (str[1] == '\0' && (root[0] != '\0' ||
2368                             relpath[0] != '\0'))
2369                                 str++;
2370
2371                         if (relpath[0] == '\0')
2372                                 (void) snprintf(propbuf, proplen, "%s%s",
2373                                     root, str);
2374                         else
2375                                 (void) snprintf(propbuf, proplen, "%s%s%s%s",
2376                                     root, str, relpath[0] == '@' ? "" : "/",
2377                                     relpath);
2378                 } else {
2379                         /* 'legacy' or 'none' */
2380                         (void) strlcpy(propbuf, str, proplen);
2381                 }
2382
2383                 break;
2384
2385         case ZFS_PROP_ORIGIN:
2386                 str = getprop_string(zhp, prop, &source);
2387                 if (str == NULL)
2388                         return (-1);
2389                 (void) strlcpy(propbuf, str, proplen);
2390                 break;
2391
2392         case ZFS_PROP_CLONES:
2393                 if (get_clones_string(zhp, propbuf, proplen) != 0)
2394                         return (-1);
2395                 break;
2396
2397         case ZFS_PROP_QUOTA:
2398         case ZFS_PROP_REFQUOTA:
2399         case ZFS_PROP_RESERVATION:
2400         case ZFS_PROP_REFRESERVATION:
2401
2402                 if (get_numeric_property(zhp, prop, src, &source, &val) != 0)
2403                         return (-1);
2404
2405                 /*
2406                  * If quota or reservation is 0, we translate this into 'none'
2407                  * (unless literal is set), and indicate that it's the default
2408                  * value.  Otherwise, we print the number nicely and indicate
2409                  * that its set locally.
2410                  */
2411                 if (val == 0) {
2412                         if (literal)
2413                                 (void) strlcpy(propbuf, "0", proplen);
2414                         else
2415                                 (void) strlcpy(propbuf, "none", proplen);
2416                 } else {
2417                         if (literal)
2418                                 (void) snprintf(propbuf, proplen, "%llu",
2419                                     (u_longlong_t)val);
2420                         else
2421                                 zfs_nicenum(val, propbuf, proplen);
2422                 }
2423                 break;
2424
2425         case ZFS_PROP_FILESYSTEM_LIMIT:
2426         case ZFS_PROP_SNAPSHOT_LIMIT:
2427         case ZFS_PROP_FILESYSTEM_COUNT:
2428         case ZFS_PROP_SNAPSHOT_COUNT:
2429
2430                 if (get_numeric_property(zhp, prop, src, &source, &val) != 0)
2431                         return (-1);
2432
2433                 /*
2434                  * If limit is UINT64_MAX, we translate this into 'none' (unless
2435                  * literal is set), and indicate that it's the default value.
2436                  * Otherwise, we print the number nicely and indicate that it's
2437                  * set locally.
2438                  */
2439                 if (literal) {
2440                         (void) snprintf(propbuf, proplen, "%llu",
2441                             (u_longlong_t)val);
2442                 } else if (val == UINT64_MAX) {
2443                         (void) strlcpy(propbuf, "none", proplen);
2444                 } else {
2445                         zfs_nicenum(val, propbuf, proplen);
2446                 }
2447                 break;
2448
2449         case ZFS_PROP_REFRATIO:
2450         case ZFS_PROP_COMPRESSRATIO:
2451                 if (get_numeric_property(zhp, prop, src, &source, &val) != 0)
2452                         return (-1);
2453                 (void) snprintf(propbuf, proplen, "%llu.%02llux",
2454                     (u_longlong_t)(val / 100),
2455                     (u_longlong_t)(val % 100));
2456                 break;
2457
2458         case ZFS_PROP_TYPE:
2459                 switch (zhp->zfs_type) {
2460                 case ZFS_TYPE_FILESYSTEM:
2461                         str = "filesystem";
2462                         break;
2463                 case ZFS_TYPE_VOLUME:
2464                         str = "volume";
2465                         break;
2466                 case ZFS_TYPE_SNAPSHOT:
2467                         str = "snapshot";
2468                         break;
2469                 case ZFS_TYPE_BOOKMARK:
2470                         str = "bookmark";
2471                         break;
2472                 default:
2473                         abort();
2474                 }
2475                 (void) snprintf(propbuf, proplen, "%s", str);
2476                 break;
2477
2478         case ZFS_PROP_MOUNTED:
2479                 /*
2480                  * The 'mounted' property is a pseudo-property that described
2481                  * whether the filesystem is currently mounted.  Even though
2482                  * it's a boolean value, the typical values of "on" and "off"
2483                  * don't make sense, so we translate to "yes" and "no".
2484                  */
2485                 if (get_numeric_property(zhp, ZFS_PROP_MOUNTED,
2486                     src, &source, &val) != 0)
2487                         return (-1);
2488                 if (val)
2489                         (void) strlcpy(propbuf, "yes", proplen);
2490                 else
2491                         (void) strlcpy(propbuf, "no", proplen);
2492                 break;
2493
2494         case ZFS_PROP_NAME:
2495                 /*
2496                  * The 'name' property is a pseudo-property derived from the
2497                  * dataset name.  It is presented as a real property to simplify
2498                  * consumers.
2499                  */
2500                 (void) strlcpy(propbuf, zhp->zfs_name, proplen);
2501                 break;
2502
2503         case ZFS_PROP_MLSLABEL:
2504                 {
2505 #ifdef sun
2506                         m_label_t *new_sl = NULL;
2507                         char *ascii = NULL;     /* human readable label */
2508
2509                         (void) strlcpy(propbuf,
2510                             getprop_string(zhp, prop, &source), proplen);
2511
2512                         if (literal || (strcasecmp(propbuf,
2513                             ZFS_MLSLABEL_DEFAULT) == 0))
2514                                 break;
2515
2516                         /*
2517                          * Try to translate the internal hex string to
2518                          * human-readable output.  If there are any
2519                          * problems just use the hex string.
2520                          */
2521
2522                         if (str_to_label(propbuf, &new_sl, MAC_LABEL,
2523                             L_NO_CORRECTION, NULL) == -1) {
2524                                 m_label_free(new_sl);
2525                                 break;
2526                         }
2527
2528                         if (label_to_str(new_sl, &ascii, M_LABEL,
2529                             DEF_NAMES) != 0) {
2530                                 if (ascii)
2531                                         free(ascii);
2532                                 m_label_free(new_sl);
2533                                 break;
2534                         }
2535                         m_label_free(new_sl);
2536
2537                         (void) strlcpy(propbuf, ascii, proplen);
2538                         free(ascii);
2539 #else   /* !sun */
2540                         propbuf[0] = '\0';
2541 #endif  /* !sun */
2542                 }
2543                 break;
2544
2545         case ZFS_PROP_GUID:
2546                 /*
2547                  * GUIDs are stored as numbers, but they are identifiers.
2548                  * We don't want them to be pretty printed, because pretty
2549                  * printing mangles the ID into a truncated and useless value.
2550                  */
2551                 if (get_numeric_property(zhp, prop, src, &source, &val) != 0)
2552                         return (-1);
2553                 (void) snprintf(propbuf, proplen, "%llu", (u_longlong_t)val);
2554                 break;
2555
2556         default:
2557                 switch (zfs_prop_get_type(prop)) {
2558                 case PROP_TYPE_NUMBER:
2559                         if (get_numeric_property(zhp, prop, src,
2560                             &source, &val) != 0)
2561                                 return (-1);
2562                         if (literal)
2563                                 (void) snprintf(propbuf, proplen, "%llu",
2564                                     (u_longlong_t)val);
2565                         else
2566                                 zfs_nicenum(val, propbuf, proplen);
2567                         break;
2568
2569                 case PROP_TYPE_STRING:
2570                         str = getprop_string(zhp, prop, &source);
2571                         if (str == NULL)
2572                                 return (-1);
2573                         (void) strlcpy(propbuf, str, proplen);
2574                         break;
2575
2576                 case PROP_TYPE_INDEX:
2577                         if (get_numeric_property(zhp, prop, src,
2578                             &source, &val) != 0)
2579                                 return (-1);
2580                         if (zfs_prop_index_to_string(prop, val, &strval) != 0)
2581                                 return (-1);
2582                         (void) strlcpy(propbuf, strval, proplen);
2583                         break;
2584
2585                 default:
2586                         abort();
2587                 }
2588         }
2589
2590         get_source(zhp, src, source, statbuf, statlen);
2591
2592         return (0);
2593 }
2594
2595 /*
2596  * Utility function to get the given numeric property.  Does no validation that
2597  * the given property is the appropriate type; should only be used with
2598  * hard-coded property types.
2599  */
2600 uint64_t
2601 zfs_prop_get_int(zfs_handle_t *zhp, zfs_prop_t prop)
2602 {
2603         char *source;
2604         uint64_t val;
2605
2606         (void) get_numeric_property(zhp, prop, NULL, &source, &val);
2607
2608         return (val);
2609 }
2610
2611 int
2612 zfs_prop_set_int(zfs_handle_t *zhp, zfs_prop_t prop, uint64_t val)
2613 {
2614         char buf[64];
2615
2616         (void) snprintf(buf, sizeof (buf), "%llu", (longlong_t)val);
2617         return (zfs_prop_set(zhp, zfs_prop_to_name(prop), buf));
2618 }
2619
2620 /*
2621  * Similar to zfs_prop_get(), but returns the value as an integer.
2622  */
2623 int
2624 zfs_prop_get_numeric(zfs_handle_t *zhp, zfs_prop_t prop, uint64_t *value,
2625     zprop_source_t *src, char *statbuf, size_t statlen)
2626 {
2627         char *source;
2628
2629         /*
2630          * Check to see if this property applies to our object
2631          */
2632         if (!zfs_prop_valid_for_type(prop, zhp->zfs_type)) {
2633                 return (zfs_error_fmt(zhp->zfs_hdl, EZFS_PROPTYPE,
2634                     dgettext(TEXT_DOMAIN, "cannot get property '%s'"),
2635                     zfs_prop_to_name(prop)));
2636         }
2637
2638         if (src)
2639                 *src = ZPROP_SRC_NONE;
2640
2641         if (get_numeric_property(zhp, prop, src, &source, value) != 0)
2642                 return (-1);
2643
2644         get_source(zhp, src, source, statbuf, statlen);
2645
2646         return (0);
2647 }
2648
2649 static int
2650 idmap_id_to_numeric_domain_rid(uid_t id, boolean_t isuser,
2651     char **domainp, idmap_rid_t *ridp)
2652 {
2653 #ifdef sun
2654         idmap_get_handle_t *get_hdl = NULL;
2655         idmap_stat status;
2656         int err = EINVAL;
2657
2658         if (idmap_get_create(&get_hdl) != IDMAP_SUCCESS)
2659                 goto out;
2660
2661         if (isuser) {
2662                 err = idmap_get_sidbyuid(get_hdl, id,
2663                     IDMAP_REQ_FLG_USE_CACHE, domainp, ridp, &status);
2664         } else {
2665                 err = idmap_get_sidbygid(get_hdl, id,
2666                     IDMAP_REQ_FLG_USE_CACHE, domainp, ridp, &status);
2667         }
2668         if (err == IDMAP_SUCCESS &&
2669             idmap_get_mappings(get_hdl) == IDMAP_SUCCESS &&
2670             status == IDMAP_SUCCESS)
2671                 err = 0;
2672         else
2673                 err = EINVAL;
2674 out:
2675         if (get_hdl)
2676                 idmap_get_destroy(get_hdl);
2677         return (err);
2678 #else   /* !sun */
2679         assert(!"invalid code path");
2680         return (EINVAL); // silence compiler warning
2681 #endif  /* !sun */
2682 }
2683
2684 /*
2685  * convert the propname into parameters needed by kernel
2686  * Eg: userquota@ahrens -> ZFS_PROP_USERQUOTA, "", 126829
2687  * Eg: userused@matt@domain -> ZFS_PROP_USERUSED, "S-1-123-456", 789
2688  */
2689 static int
2690 userquota_propname_decode(const char *propname, boolean_t zoned,
2691     zfs_userquota_prop_t *typep, char *domain, int domainlen, uint64_t *ridp)
2692 {
2693         zfs_userquota_prop_t type;
2694         char *cp, *end;
2695         char *numericsid = NULL;
2696         boolean_t isuser;
2697
2698         domain[0] = '\0';
2699         *ridp = 0;
2700         /* Figure out the property type ({user|group}{quota|space}) */
2701         for (type = 0; type < ZFS_NUM_USERQUOTA_PROPS; type++) {
2702                 if (strncmp(propname, zfs_userquota_prop_prefixes[type],
2703                     strlen(zfs_userquota_prop_prefixes[type])) == 0)
2704                         break;
2705         }
2706         if (type == ZFS_NUM_USERQUOTA_PROPS)
2707                 return (EINVAL);
2708         *typep = type;
2709
2710         isuser = (type == ZFS_PROP_USERQUOTA ||
2711             type == ZFS_PROP_USERUSED);
2712
2713         cp = strchr(propname, '@') + 1;
2714
2715         if (strchr(cp, '@')) {
2716 #ifdef sun
2717                 /*
2718                  * It's a SID name (eg "user@domain") that needs to be
2719                  * turned into S-1-domainID-RID.
2720                  */
2721                 int flag = 0;
2722                 idmap_stat stat, map_stat;
2723                 uid_t pid;
2724                 idmap_rid_t rid;
2725                 idmap_get_handle_t *gh = NULL;
2726
2727                 stat = idmap_get_create(&gh);
2728                 if (stat != IDMAP_SUCCESS) {
2729                         idmap_get_destroy(gh);
2730                         return (ENOMEM);
2731                 }
2732                 if (zoned && getzoneid() == GLOBAL_ZONEID)
2733                         return (ENOENT);
2734                 if (isuser) {
2735                         stat = idmap_getuidbywinname(cp, NULL, flag, &pid);
2736                         if (stat < 0)
2737                                 return (ENOENT);
2738                         stat = idmap_get_sidbyuid(gh, pid, flag, &numericsid,
2739                             &rid, &map_stat);
2740                 } else {
2741                         stat = idmap_getgidbywinname(cp, NULL, flag, &pid);
2742                         if (stat < 0)
2743                                 return (ENOENT);
2744                         stat = idmap_get_sidbygid(gh, pid, flag, &numericsid,
2745                             &rid, &map_stat);
2746                 }
2747                 if (stat < 0) {
2748                         idmap_get_destroy(gh);
2749                         return (ENOENT);
2750                 }
2751                 stat = idmap_get_mappings(gh);
2752                 idmap_get_destroy(gh);
2753
2754                 if (stat < 0) {
2755                         return (ENOENT);
2756                 }
2757                 if (numericsid == NULL)
2758                         return (ENOENT);
2759                 cp = numericsid;
2760                 *ridp = rid;
2761                 /* will be further decoded below */
2762 #else   /* !sun */
2763                 return (ENOENT);
2764 #endif  /* !sun */
2765         }
2766
2767         if (strncmp(cp, "S-1-", 4) == 0) {
2768                 /* It's a numeric SID (eg "S-1-234-567-89") */
2769                 (void) strlcpy(domain, cp, domainlen);
2770                 errno = 0;
2771                 if (*ridp == 0) {
2772                         cp = strrchr(domain, '-');
2773                         *cp = '\0';
2774                         cp++;
2775                         *ridp = strtoull(cp, &end, 10);
2776                 } else {
2777                         end = "";
2778                 }
2779                 if (numericsid) {
2780                         free(numericsid);
2781                         numericsid = NULL;
2782                 }
2783                 if (errno != 0 || *end != '\0')
2784                         return (EINVAL);
2785         } else if (!isdigit(*cp)) {
2786                 /*
2787                  * It's a user/group name (eg "user") that needs to be
2788                  * turned into a uid/gid
2789                  */
2790                 if (zoned && getzoneid() == GLOBAL_ZONEID)
2791                         return (ENOENT);
2792                 if (isuser) {
2793                         struct passwd *pw;
2794                         pw = getpwnam(cp);
2795                         if (pw == NULL)
2796                                 return (ENOENT);
2797                         *ridp = pw->pw_uid;
2798                 } else {
2799                         struct group *gr;
2800                         gr = getgrnam(cp);
2801                         if (gr == NULL)
2802                                 return (ENOENT);
2803                         *ridp = gr->gr_gid;
2804                 }
2805         } else {
2806                 /* It's a user/group ID (eg "12345"). */
2807                 uid_t id = strtoul(cp, &end, 10);
2808                 idmap_rid_t rid;
2809                 char *mapdomain;
2810
2811                 if (*end != '\0')
2812                         return (EINVAL);
2813                 if (id > MAXUID) {
2814                         /* It's an ephemeral ID. */
2815                         if (idmap_id_to_numeric_domain_rid(id, isuser,
2816                             &mapdomain, &rid) != 0)
2817                                 return (ENOENT);
2818                         (void) strlcpy(domain, mapdomain, domainlen);
2819                         *ridp = rid;
2820                 } else {
2821                         *ridp = id;
2822                 }
2823         }
2824
2825         ASSERT3P(numericsid, ==, NULL);
2826         return (0);
2827 }
2828
2829 static int
2830 zfs_prop_get_userquota_common(zfs_handle_t *zhp, const char *propname,
2831     uint64_t *propvalue, zfs_userquota_prop_t *typep)
2832 {
2833         int err;
2834         zfs_cmd_t zc = { 0 };
2835
2836         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
2837
2838         err = userquota_propname_decode(propname,
2839             zfs_prop_get_int(zhp, ZFS_PROP_ZONED),
2840             typep, zc.zc_value, sizeof (zc.zc_value), &zc.zc_guid);
2841         zc.zc_objset_type = *typep;
2842         if (err)
2843                 return (err);
2844
2845         err = ioctl(zhp->zfs_hdl->libzfs_fd, ZFS_IOC_USERSPACE_ONE, &zc);
2846         if (err)
2847                 return (err);
2848
2849         *propvalue = zc.zc_cookie;
2850         return (0);
2851 }
2852
2853 int
2854 zfs_prop_get_userquota_int(zfs_handle_t *zhp, const char *propname,
2855     uint64_t *propvalue)
2856 {
2857         zfs_userquota_prop_t type;
2858
2859         return (zfs_prop_get_userquota_common(zhp, propname, propvalue,
2860             &type));
2861 }
2862
2863 int
2864 zfs_prop_get_userquota(zfs_handle_t *zhp, const char *propname,
2865     char *propbuf, int proplen, boolean_t literal)
2866 {
2867         int err;
2868         uint64_t propvalue;
2869         zfs_userquota_prop_t type;
2870
2871         err = zfs_prop_get_userquota_common(zhp, propname, &propvalue,
2872             &type);
2873
2874         if (err)
2875                 return (err);
2876
2877         if (literal) {
2878                 (void) snprintf(propbuf, proplen, "%llu", propvalue);
2879         } else if (propvalue == 0 &&
2880             (type == ZFS_PROP_USERQUOTA || type == ZFS_PROP_GROUPQUOTA)) {
2881                 (void) strlcpy(propbuf, "none", proplen);
2882         } else {
2883                 zfs_nicenum(propvalue, propbuf, proplen);
2884         }
2885         return (0);
2886 }
2887
2888 int
2889 zfs_prop_get_written_int(zfs_handle_t *zhp, const char *propname,
2890     uint64_t *propvalue)
2891 {
2892         int err;
2893         zfs_cmd_t zc = { 0 };
2894         const char *snapname;
2895
2896         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
2897
2898         snapname = strchr(propname, '@') + 1;
2899         if (strchr(snapname, '@')) {
2900                 (void) strlcpy(zc.zc_value, snapname, sizeof (zc.zc_value));
2901         } else {
2902                 /* snapname is the short name, append it to zhp's fsname */
2903                 char *cp;
2904
2905                 (void) strlcpy(zc.zc_value, zhp->zfs_name,
2906                     sizeof (zc.zc_value));
2907                 cp = strchr(zc.zc_value, '@');
2908                 if (cp != NULL)
2909                         *cp = '\0';
2910                 (void) strlcat(zc.zc_value, "@", sizeof (zc.zc_value));
2911                 (void) strlcat(zc.zc_value, snapname, sizeof (zc.zc_value));
2912         }
2913
2914         err = ioctl(zhp->zfs_hdl->libzfs_fd, ZFS_IOC_SPACE_WRITTEN, &zc);
2915         if (err)
2916                 return (err);
2917
2918         *propvalue = zc.zc_cookie;
2919         return (0);
2920 }
2921
2922 int
2923 zfs_prop_get_written(zfs_handle_t *zhp, const char *propname,
2924     char *propbuf, int proplen, boolean_t literal)
2925 {
2926         int err;
2927         uint64_t propvalue;
2928
2929         err = zfs_prop_get_written_int(zhp, propname, &propvalue);
2930
2931         if (err)
2932                 return (err);
2933
2934         if (literal) {
2935                 (void) snprintf(propbuf, proplen, "%llu", propvalue);
2936         } else {
2937                 zfs_nicenum(propvalue, propbuf, proplen);
2938         }
2939         return (0);
2940 }
2941
2942 /*
2943  * Returns the name of the given zfs handle.
2944  */
2945 const char *
2946 zfs_get_name(const zfs_handle_t *zhp)
2947 {
2948         return (zhp->zfs_name);
2949 }
2950
2951 /*
2952  * Returns the type of the given zfs handle.
2953  */
2954 zfs_type_t
2955 zfs_get_type(const zfs_handle_t *zhp)
2956 {
2957         return (zhp->zfs_type);
2958 }
2959
2960 /*
2961  * Is one dataset name a child dataset of another?
2962  *
2963  * Needs to handle these cases:
2964  * Dataset 1    "a/foo"         "a/foo"         "a/foo"         "a/foo"
2965  * Dataset 2    "a/fo"          "a/foobar"      "a/bar/baz"     "a/foo/bar"
2966  * Descendant?  No.             No.             No.             Yes.
2967  */
2968 static boolean_t
2969 is_descendant(const char *ds1, const char *ds2)
2970 {
2971         size_t d1len = strlen(ds1);
2972
2973         /* ds2 can't be a descendant if it's smaller */
2974         if (strlen(ds2) < d1len)
2975                 return (B_FALSE);
2976
2977         /* otherwise, compare strings and verify that there's a '/' char */
2978         return (ds2[d1len] == '/' && (strncmp(ds1, ds2, d1len) == 0));
2979 }
2980
2981 /*
2982  * Given a complete name, return just the portion that refers to the parent.
2983  * Will return -1 if there is no parent (path is just the name of the
2984  * pool).
2985  */
2986 static int
2987 parent_name(const char *path, char *buf, size_t buflen)
2988 {
2989         char *slashp;
2990
2991         (void) strlcpy(buf, path, buflen);
2992
2993         if ((slashp = strrchr(buf, '/')) == NULL)
2994                 return (-1);
2995         *slashp = '\0';
2996
2997         return (0);
2998 }
2999
3000 /*
3001  * If accept_ancestor is false, then check to make sure that the given path has
3002  * a parent, and that it exists.  If accept_ancestor is true, then find the
3003  * closest existing ancestor for the given path.  In prefixlen return the
3004  * length of already existing prefix of the given path.  We also fetch the
3005  * 'zoned' property, which is used to validate property settings when creating
3006  * new datasets.
3007  */
3008 static int
3009 check_parents(libzfs_handle_t *hdl, const char *path, uint64_t *zoned,
3010     boolean_t accept_ancestor, int *prefixlen)
3011 {
3012         zfs_cmd_t zc = { 0 };
3013         char parent[ZFS_MAXNAMELEN];
3014         char *slash;
3015         zfs_handle_t *zhp;
3016         char errbuf[1024];
3017         uint64_t is_zoned;
3018
3019         (void) snprintf(errbuf, sizeof (errbuf),
3020             dgettext(TEXT_DOMAIN, "cannot create '%s'"), path);
3021
3022         /* get parent, and check to see if this is just a pool */
3023         if (parent_name(path, parent, sizeof (parent)) != 0) {
3024                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3025                     "missing dataset name"));
3026                 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3027         }
3028
3029         /* check to see if the pool exists */
3030         if ((slash = strchr(parent, '/')) == NULL)
3031                 slash = parent + strlen(parent);
3032         (void) strncpy(zc.zc_name, parent, slash - parent);
3033         zc.zc_name[slash - parent] = '\0';
3034         if (ioctl(hdl->libzfs_fd, ZFS_IOC_OBJSET_STATS, &zc) != 0 &&
3035             errno == ENOENT) {
3036                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3037                     "no such pool '%s'"), zc.zc_name);
3038                 return (zfs_error(hdl, EZFS_NOENT, errbuf));
3039         }
3040
3041         /* check to see if the parent dataset exists */
3042         while ((zhp = make_dataset_handle(hdl, parent)) == NULL) {
3043                 if (errno == ENOENT && accept_ancestor) {
3044                         /*
3045                          * Go deeper to find an ancestor, give up on top level.
3046                          */
3047                         if (parent_name(parent, parent, sizeof (parent)) != 0) {
3048                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3049                                     "no such pool '%s'"), zc.zc_name);
3050                                 return (zfs_error(hdl, EZFS_NOENT, errbuf));
3051                         }
3052                 } else if (errno == ENOENT) {
3053                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3054                             "parent does not exist"));
3055                         return (zfs_error(hdl, EZFS_NOENT, errbuf));
3056                 } else
3057                         return (zfs_standard_error(hdl, errno, errbuf));
3058         }
3059
3060         is_zoned = zfs_prop_get_int(zhp, ZFS_PROP_ZONED);
3061         if (zoned != NULL)
3062                 *zoned = is_zoned;
3063
3064         /* we are in a non-global zone, but parent is in the global zone */
3065         if (getzoneid() != GLOBAL_ZONEID && !is_zoned) {
3066                 (void) zfs_standard_error(hdl, EPERM, errbuf);
3067                 zfs_close(zhp);
3068                 return (-1);
3069         }
3070
3071         /* make sure parent is a filesystem */
3072         if (zfs_get_type(zhp) != ZFS_TYPE_FILESYSTEM) {
3073                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3074                     "parent is not a filesystem"));
3075                 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf);
3076                 zfs_close(zhp);
3077                 return (-1);
3078         }
3079
3080         zfs_close(zhp);
3081         if (prefixlen != NULL)
3082                 *prefixlen = strlen(parent);
3083         return (0);
3084 }
3085
3086 /*
3087  * Finds whether the dataset of the given type(s) exists.
3088  */
3089 boolean_t
3090 zfs_dataset_exists(libzfs_handle_t *hdl, const char *path, zfs_type_t types)
3091 {
3092         zfs_handle_t *zhp;
3093
3094         if (!zfs_validate_name(hdl, path, types, B_FALSE))
3095                 return (B_FALSE);
3096
3097         /*
3098          * Try to get stats for the dataset, which will tell us if it exists.
3099          */
3100         if ((zhp = make_dataset_handle(hdl, path)) != NULL) {
3101                 int ds_type = zhp->zfs_type;
3102
3103                 zfs_close(zhp);
3104                 if (types & ds_type)
3105                         return (B_TRUE);
3106         }
3107         return (B_FALSE);
3108 }
3109
3110 /*
3111  * Given a path to 'target', create all the ancestors between
3112  * the prefixlen portion of the path, and the target itself.
3113  * Fail if the initial prefixlen-ancestor does not already exist.
3114  */
3115 int
3116 create_parents(libzfs_handle_t *hdl, char *target, int prefixlen)
3117 {
3118         zfs_handle_t *h;
3119         char *cp;
3120         const char *opname;
3121
3122         /* make sure prefix exists */
3123         cp = target + prefixlen;
3124         if (*cp != '/') {
3125                 assert(strchr(cp, '/') == NULL);
3126                 h = zfs_open(hdl, target, ZFS_TYPE_FILESYSTEM);
3127         } else {
3128                 *cp = '\0';
3129                 h = zfs_open(hdl, target, ZFS_TYPE_FILESYSTEM);
3130                 *cp = '/';
3131         }
3132         if (h == NULL)
3133                 return (-1);
3134         zfs_close(h);
3135
3136         /*
3137          * Attempt to create, mount, and share any ancestor filesystems,
3138          * up to the prefixlen-long one.
3139          */
3140         for (cp = target + prefixlen + 1;
3141             cp = strchr(cp, '/'); *cp = '/', cp++) {
3142
3143                 *cp = '\0';
3144
3145                 h = make_dataset_handle(hdl, target);
3146                 if (h) {
3147                         /* it already exists, nothing to do here */
3148                         zfs_close(h);
3149                         continue;
3150                 }
3151
3152                 if (zfs_create(hdl, target, ZFS_TYPE_FILESYSTEM,
3153                     NULL) != 0) {
3154                         opname = dgettext(TEXT_DOMAIN, "create");
3155                         goto ancestorerr;
3156                 }
3157
3158                 h = zfs_open(hdl, target, ZFS_TYPE_FILESYSTEM);
3159                 if (h == NULL) {
3160                         opname = dgettext(TEXT_DOMAIN, "open");
3161                         goto ancestorerr;
3162                 }
3163
3164                 if (zfs_mount(h, NULL, 0) != 0) {
3165                         opname = dgettext(TEXT_DOMAIN, "mount");
3166                         goto ancestorerr;
3167                 }
3168
3169                 if (zfs_share(h) != 0) {
3170                         opname = dgettext(TEXT_DOMAIN, "share");
3171                         goto ancestorerr;
3172                 }
3173
3174                 zfs_close(h);
3175         }
3176
3177         return (0);
3178
3179 ancestorerr:
3180         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3181             "failed to %s ancestor '%s'"), opname, target);
3182         return (-1);
3183 }
3184
3185 /*
3186  * Creates non-existing ancestors of the given path.
3187  */
3188 int
3189 zfs_create_ancestors(libzfs_handle_t *hdl, const char *path)
3190 {
3191         int prefix;
3192         char *path_copy;
3193         int rc;
3194
3195         if (check_parents(hdl, path, NULL, B_TRUE, &prefix) != 0)
3196                 return (-1);
3197
3198         if ((path_copy = strdup(path)) != NULL) {
3199                 rc = create_parents(hdl, path_copy, prefix);
3200                 free(path_copy);
3201         }
3202         if (path_copy == NULL || rc != 0)
3203                 return (-1);
3204
3205         return (0);
3206 }
3207
3208 /*
3209  * Create a new filesystem or volume.
3210  */
3211 int
3212 zfs_create(libzfs_handle_t *hdl, const char *path, zfs_type_t type,
3213     nvlist_t *props)
3214 {
3215         int ret;
3216         uint64_t size = 0;
3217         uint64_t blocksize = zfs_prop_default_numeric(ZFS_PROP_VOLBLOCKSIZE);
3218         char errbuf[1024];
3219         uint64_t zoned;
3220         dmu_objset_type_t ost;
3221
3222         (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3223             "cannot create '%s'"), path);
3224
3225         /* validate the path, taking care to note the extended error message */
3226         if (!zfs_validate_name(hdl, path, type, B_TRUE))
3227                 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3228
3229         /* validate parents exist */
3230         if (check_parents(hdl, path, &zoned, B_FALSE, NULL) != 0)
3231                 return (-1);
3232
3233         /*
3234          * The failure modes when creating a dataset of a different type over
3235          * one that already exists is a little strange.  In particular, if you
3236          * try to create a dataset on top of an existing dataset, the ioctl()
3237          * will return ENOENT, not EEXIST.  To prevent this from happening, we
3238          * first try to see if the dataset exists.
3239          */
3240         if (zfs_dataset_exists(hdl, path, ZFS_TYPE_DATASET)) {
3241                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3242                     "dataset already exists"));
3243                 return (zfs_error(hdl, EZFS_EXISTS, errbuf));
3244         }
3245
3246         if (type == ZFS_TYPE_VOLUME)
3247                 ost = DMU_OST_ZVOL;
3248         else
3249                 ost = DMU_OST_ZFS;
3250
3251         if (props && (props = zfs_valid_proplist(hdl, type, props,
3252             zoned, NULL, errbuf)) == 0)
3253                 return (-1);
3254
3255         if (type == ZFS_TYPE_VOLUME) {
3256                 /*
3257                  * If we are creating a volume, the size and block size must
3258                  * satisfy a few restraints.  First, the blocksize must be a
3259                  * valid block size between SPA_{MIN,MAX}BLOCKSIZE.  Second, the
3260                  * volsize must be a multiple of the block size, and cannot be
3261                  * zero.
3262                  */
3263                 if (props == NULL || nvlist_lookup_uint64(props,
3264                     zfs_prop_to_name(ZFS_PROP_VOLSIZE), &size) != 0) {
3265                         nvlist_free(props);
3266                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3267                             "missing volume size"));
3268                         return (zfs_error(hdl, EZFS_BADPROP, errbuf));
3269                 }
3270
3271                 if ((ret = nvlist_lookup_uint64(props,
3272                     zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE),
3273                     &blocksize)) != 0) {
3274                         if (ret == ENOENT) {
3275                                 blocksize = zfs_prop_default_numeric(
3276                                     ZFS_PROP_VOLBLOCKSIZE);
3277                         } else {
3278                                 nvlist_free(props);
3279                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3280                                     "missing volume block size"));
3281                                 return (zfs_error(hdl, EZFS_BADPROP, errbuf));
3282                         }
3283                 }
3284
3285                 if (size == 0) {
3286                         nvlist_free(props);
3287                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3288                             "volume size cannot be zero"));
3289                         return (zfs_error(hdl, EZFS_BADPROP, errbuf));
3290                 }
3291
3292                 if (size % blocksize != 0) {
3293                         nvlist_free(props);
3294                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3295                             "volume size must be a multiple of volume block "
3296                             "size"));
3297                         return (zfs_error(hdl, EZFS_BADPROP, errbuf));
3298                 }
3299         }
3300
3301         /* create the dataset */
3302         ret = lzc_create(path, ost, props);
3303         nvlist_free(props);
3304
3305         /* check for failure */
3306         if (ret != 0) {
3307                 char parent[ZFS_MAXNAMELEN];
3308                 (void) parent_name(path, parent, sizeof (parent));
3309
3310                 switch (errno) {
3311                 case ENOENT:
3312                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3313                             "no such parent '%s'"), parent);
3314                         return (zfs_error(hdl, EZFS_NOENT, errbuf));
3315
3316                 case EINVAL:
3317                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3318                             "parent '%s' is not a filesystem"), parent);
3319                         return (zfs_error(hdl, EZFS_BADTYPE, errbuf));
3320
3321                 case EDOM:
3322                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3323                             "volume block size must be power of 2 from "
3324                             "512B to 128KB"));
3325
3326                         return (zfs_error(hdl, EZFS_BADPROP, errbuf));
3327
3328                 case ENOTSUP:
3329                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3330                             "pool must be upgraded to set this "
3331                             "property or value"));
3332                         return (zfs_error(hdl, EZFS_BADVERSION, errbuf));
3333 #ifdef _ILP32
3334                 case EOVERFLOW:
3335                         /*
3336                          * This platform can't address a volume this big.
3337                          */
3338                         if (type == ZFS_TYPE_VOLUME)
3339                                 return (zfs_error(hdl, EZFS_VOLTOOBIG,
3340                                     errbuf));
3341 #endif
3342                         /* FALLTHROUGH */
3343                 default:
3344                         return (zfs_standard_error(hdl, errno, errbuf));
3345                 }
3346         }
3347
3348         return (0);
3349 }
3350
3351 /*
3352  * Destroys the given dataset.  The caller must make sure that the filesystem
3353  * isn't mounted, and that there are no active dependents. If the file system
3354  * does not exist this function does nothing.
3355  */
3356 int
3357 zfs_destroy(zfs_handle_t *zhp, boolean_t defer)
3358 {
3359         zfs_cmd_t zc = { 0 };
3360
3361         if (zhp->zfs_type == ZFS_TYPE_BOOKMARK) {
3362                 nvlist_t *nv = fnvlist_alloc();
3363                 fnvlist_add_boolean(nv, zhp->zfs_name);
3364                 int error = lzc_destroy_bookmarks(nv, NULL);
3365                 fnvlist_free(nv);
3366                 if (error != 0) {
3367                         return (zfs_standard_error_fmt(zhp->zfs_hdl, errno,
3368                             dgettext(TEXT_DOMAIN, "cannot destroy '%s'"),
3369                             zhp->zfs_name));
3370                 }
3371                 return (0);
3372         }
3373
3374         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
3375
3376         if (ZFS_IS_VOLUME(zhp)) {
3377                 zc.zc_objset_type = DMU_OST_ZVOL;
3378         } else {
3379                 zc.zc_objset_type = DMU_OST_ZFS;
3380         }
3381
3382         zc.zc_defer_destroy = defer;
3383         if (zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_DESTROY, &zc) != 0 &&
3384             errno != ENOENT) {
3385                 return (zfs_standard_error_fmt(zhp->zfs_hdl, errno,
3386                     dgettext(TEXT_DOMAIN, "cannot destroy '%s'"),
3387                     zhp->zfs_name));
3388         }
3389
3390         remove_mountpoint(zhp);
3391
3392         return (0);
3393 }
3394
3395 struct destroydata {
3396         nvlist_t *nvl;
3397         const char *snapname;
3398 };
3399
3400 static int
3401 zfs_check_snap_cb(zfs_handle_t *zhp, void *arg)
3402 {
3403         struct destroydata *dd = arg;
3404         char name[ZFS_MAXNAMELEN];
3405         int rv = 0;
3406
3407         (void) snprintf(name, sizeof (name),
3408             "%s@%s", zhp->zfs_name, dd->snapname);
3409
3410         if (lzc_exists(name))
3411                 verify(nvlist_add_boolean(dd->nvl, name) == 0);
3412
3413         rv = zfs_iter_filesystems(zhp, zfs_check_snap_cb, dd);
3414         zfs_close(zhp);
3415         return (rv);
3416 }
3417
3418 /*
3419  * Destroys all snapshots with the given name in zhp & descendants.
3420  */
3421 int
3422 zfs_destroy_snaps(zfs_handle_t *zhp, char *snapname, boolean_t defer)
3423 {
3424         int ret;
3425         struct destroydata dd = { 0 };
3426
3427         dd.snapname = snapname;
3428         verify(nvlist_alloc(&dd.nvl, NV_UNIQUE_NAME, 0) == 0);
3429         (void) zfs_check_snap_cb(zfs_handle_dup(zhp), &dd);
3430
3431         if (nvlist_empty(dd.nvl)) {
3432                 ret = zfs_standard_error_fmt(zhp->zfs_hdl, ENOENT,
3433                     dgettext(TEXT_DOMAIN, "cannot destroy '%s@%s'"),
3434                     zhp->zfs_name, snapname);
3435         } else {
3436                 ret = zfs_destroy_snaps_nvl(zhp->zfs_hdl, dd.nvl, defer);
3437         }
3438         nvlist_free(dd.nvl);
3439         return (ret);
3440 }
3441
3442 /*
3443  * Destroys all the snapshots named in the nvlist.
3444  */
3445 int
3446 zfs_destroy_snaps_nvl(libzfs_handle_t *hdl, nvlist_t *snaps, boolean_t defer)
3447 {
3448         int ret;
3449         nvlist_t *errlist;
3450
3451         ret = lzc_destroy_snaps(snaps, defer, &errlist);
3452
3453         if (ret == 0)
3454                 return (0);
3455
3456         if (nvlist_empty(errlist)) {
3457                 char errbuf[1024];
3458                 (void) snprintf(errbuf, sizeof (errbuf),
3459                     dgettext(TEXT_DOMAIN, "cannot destroy snapshots"));
3460
3461                 ret = zfs_standard_error(hdl, ret, errbuf);
3462         }
3463         for (nvpair_t *pair = nvlist_next_nvpair(errlist, NULL);
3464             pair != NULL; pair = nvlist_next_nvpair(errlist, pair)) {
3465                 char errbuf[1024];
3466                 (void) snprintf(errbuf, sizeof (errbuf),
3467                     dgettext(TEXT_DOMAIN, "cannot destroy snapshot %s"),
3468                     nvpair_name(pair));
3469
3470                 switch (fnvpair_value_int32(pair)) {
3471                 case EEXIST:
3472                         zfs_error_aux(hdl,
3473                             dgettext(TEXT_DOMAIN, "snapshot is cloned"));
3474                         ret = zfs_error(hdl, EZFS_EXISTS, errbuf);
3475                         break;
3476                 default:
3477                         ret = zfs_standard_error(hdl, errno, errbuf);
3478                         break;
3479                 }
3480         }
3481
3482         return (ret);
3483 }
3484
3485 /*
3486  * Clones the given dataset.  The target must be of the same type as the source.
3487  */
3488 int
3489 zfs_clone(zfs_handle_t *zhp, const char *target, nvlist_t *props)
3490 {
3491         char parent[ZFS_MAXNAMELEN];
3492         int ret;
3493         char errbuf[1024];
3494         libzfs_handle_t *hdl = zhp->zfs_hdl;
3495         uint64_t zoned;
3496
3497         assert(zhp->zfs_type == ZFS_TYPE_SNAPSHOT);
3498
3499         (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3500             "cannot create '%s'"), target);
3501
3502         /* validate the target/clone name */
3503         if (!zfs_validate_name(hdl, target, ZFS_TYPE_FILESYSTEM, B_TRUE))
3504                 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3505
3506         /* validate parents exist */
3507         if (check_parents(hdl, target, &zoned, B_FALSE, NULL) != 0)
3508                 return (-1);
3509
3510         (void) parent_name(target, parent, sizeof (parent));
3511
3512         /* do the clone */
3513
3514         if (props) {
3515                 zfs_type_t type;
3516                 if (ZFS_IS_VOLUME(zhp)) {
3517                         type = ZFS_TYPE_VOLUME;
3518                 } else {
3519                         type = ZFS_TYPE_FILESYSTEM;
3520                 }
3521                 if ((props = zfs_valid_proplist(hdl, type, props, zoned,
3522                     zhp, errbuf)) == NULL)
3523                         return (-1);
3524         }
3525
3526         ret = lzc_clone(target, zhp->zfs_name, props);
3527         nvlist_free(props);
3528
3529         if (ret != 0) {
3530                 switch (errno) {
3531
3532                 case ENOENT:
3533                         /*
3534                          * The parent doesn't exist.  We should have caught this
3535                          * above, but there may a race condition that has since
3536                          * destroyed the parent.
3537                          *
3538                          * At this point, we don't know whether it's the source
3539                          * that doesn't exist anymore, or whether the target
3540                          * dataset doesn't exist.
3541                          */
3542                         zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN,
3543                             "no such parent '%s'"), parent);
3544                         return (zfs_error(zhp->zfs_hdl, EZFS_NOENT, errbuf));
3545
3546                 case EXDEV:
3547                         zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN,
3548                             "source and target pools differ"));
3549                         return (zfs_error(zhp->zfs_hdl, EZFS_CROSSTARGET,
3550                             errbuf));
3551
3552                 default:
3553                         return (zfs_standard_error(zhp->zfs_hdl, errno,
3554                             errbuf));
3555                 }
3556         }
3557
3558         return (ret);
3559 }
3560
3561 /*
3562  * Promotes the given clone fs to be the clone parent.
3563  */
3564 int
3565 zfs_promote(zfs_handle_t *zhp)
3566 {
3567         libzfs_handle_t *hdl = zhp->zfs_hdl;
3568         zfs_cmd_t zc = { 0 };
3569         char parent[MAXPATHLEN];
3570         int ret;
3571         char errbuf[1024];
3572
3573         (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3574             "cannot promote '%s'"), zhp->zfs_name);
3575
3576         if (zhp->zfs_type == ZFS_TYPE_SNAPSHOT) {
3577                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3578                     "snapshots can not be promoted"));
3579                 return (zfs_error(hdl, EZFS_BADTYPE, errbuf));
3580         }
3581
3582         (void) strlcpy(parent, zhp->zfs_dmustats.dds_origin, sizeof (parent));
3583         if (parent[0] == '\0') {
3584                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3585                     "not a cloned filesystem"));
3586                 return (zfs_error(hdl, EZFS_BADTYPE, errbuf));
3587         }
3588
3589         (void) strlcpy(zc.zc_value, zhp->zfs_dmustats.dds_origin,
3590             sizeof (zc.zc_value));
3591         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
3592         ret = zfs_ioctl(hdl, ZFS_IOC_PROMOTE, &zc);
3593
3594         if (ret != 0) {
3595                 int save_errno = errno;
3596
3597                 switch (save_errno) {
3598                 case EEXIST:
3599                         /* There is a conflicting snapshot name. */
3600                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3601                             "conflicting snapshot '%s' from parent '%s'"),
3602                             zc.zc_string, parent);
3603                         return (zfs_error(hdl, EZFS_EXISTS, errbuf));
3604
3605                 default:
3606                         return (zfs_standard_error(hdl, save_errno, errbuf));
3607                 }
3608         }
3609         return (ret);
3610 }
3611
3612 typedef struct snapdata {
3613         nvlist_t *sd_nvl;
3614         const char *sd_snapname;
3615 } snapdata_t;
3616
3617 static int
3618 zfs_snapshot_cb(zfs_handle_t *zhp, void *arg)
3619 {
3620         snapdata_t *sd = arg;
3621         char name[ZFS_MAXNAMELEN];
3622         int rv = 0;
3623
3624         if (zfs_prop_get_int(zhp, ZFS_PROP_INCONSISTENT) == 0) {
3625                 (void) snprintf(name, sizeof (name),
3626                     "%s@%s", zfs_get_name(zhp), sd->sd_snapname);
3627
3628                 fnvlist_add_boolean(sd->sd_nvl, name);
3629
3630                 rv = zfs_iter_filesystems(zhp, zfs_snapshot_cb, sd);
3631         }
3632         zfs_close(zhp);
3633
3634         return (rv);
3635 }
3636
3637 /*
3638  * Creates snapshots.  The keys in the snaps nvlist are the snapshots to be
3639  * created.
3640  */
3641 int
3642 zfs_snapshot_nvl(libzfs_handle_t *hdl, nvlist_t *snaps, nvlist_t *props)
3643 {
3644         int ret;
3645         char errbuf[1024];
3646         nvpair_t *elem;
3647         nvlist_t *errors;
3648
3649         (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3650             "cannot create snapshots "));
3651
3652         elem = NULL;
3653         while ((elem = nvlist_next_nvpair(snaps, elem)) != NULL) {
3654                 const char *snapname = nvpair_name(elem);
3655
3656                 /* validate the target name */
3657                 if (!zfs_validate_name(hdl, snapname, ZFS_TYPE_SNAPSHOT,
3658                     B_TRUE)) {
3659                         (void) snprintf(errbuf, sizeof (errbuf),
3660                             dgettext(TEXT_DOMAIN,
3661                             "cannot create snapshot '%s'"), snapname);
3662                         return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3663                 }
3664         }
3665
3666         if (props != NULL &&
3667             (props = zfs_valid_proplist(hdl, ZFS_TYPE_SNAPSHOT,
3668             props, B_FALSE, NULL, errbuf)) == NULL) {
3669                 return (-1);
3670         }
3671
3672         ret = lzc_snapshot(snaps, props, &errors);
3673
3674         if (ret != 0) {
3675                 boolean_t printed = B_FALSE;
3676                 for (elem = nvlist_next_nvpair(errors, NULL);
3677                     elem != NULL;
3678                     elem = nvlist_next_nvpair(errors, elem)) {
3679                         (void) snprintf(errbuf, sizeof (errbuf),
3680                             dgettext(TEXT_DOMAIN,
3681                             "cannot create snapshot '%s'"), nvpair_name(elem));
3682                         (void) zfs_standard_error(hdl,
3683                             fnvpair_value_int32(elem), errbuf);
3684                         printed = B_TRUE;
3685                 }
3686                 if (!printed) {
3687                         switch (ret) {
3688                         case EXDEV:
3689                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3690                                     "multiple snapshots of same "
3691                                     "fs not allowed"));
3692                                 (void) zfs_error(hdl, EZFS_EXISTS, errbuf);
3693
3694                                 break;
3695                         default:
3696                                 (void) zfs_standard_error(hdl, ret, errbuf);
3697                         }
3698                 }
3699         }
3700
3701         nvlist_free(props);
3702         nvlist_free(errors);
3703         return (ret);
3704 }
3705
3706 int
3707 zfs_snapshot(libzfs_handle_t *hdl, const char *path, boolean_t recursive,
3708     nvlist_t *props)
3709 {
3710         int ret;
3711         snapdata_t sd = { 0 };
3712         char fsname[ZFS_MAXNAMELEN];
3713         char *cp;
3714         zfs_handle_t *zhp;
3715         char errbuf[1024];
3716
3717         (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3718             "cannot snapshot %s"), path);
3719
3720         if (!zfs_validate_name(hdl, path, ZFS_TYPE_SNAPSHOT, B_TRUE))
3721                 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3722
3723         (void) strlcpy(fsname, path, sizeof (fsname));
3724         cp = strchr(fsname, '@');
3725         *cp = '\0';
3726         sd.sd_snapname = cp + 1;
3727
3728         if ((zhp = zfs_open(hdl, fsname, ZFS_TYPE_FILESYSTEM |
3729             ZFS_TYPE_VOLUME)) == NULL) {
3730                 return (-1);
3731         }
3732
3733         verify(nvlist_alloc(&sd.sd_nvl, NV_UNIQUE_NAME, 0) == 0);
3734         if (recursive) {
3735                 (void) zfs_snapshot_cb(zfs_handle_dup(zhp), &sd);
3736         } else {
3737                 fnvlist_add_boolean(sd.sd_nvl, path);
3738         }
3739
3740         ret = zfs_snapshot_nvl(hdl, sd.sd_nvl, props);
3741         nvlist_free(sd.sd_nvl);
3742         zfs_close(zhp);
3743         return (ret);
3744 }
3745
3746 /*
3747  * Destroy any more recent snapshots.  We invoke this callback on any dependents
3748  * of the snapshot first.  If the 'cb_dependent' member is non-zero, then this
3749  * is a dependent and we should just destroy it without checking the transaction
3750  * group.
3751  */
3752 typedef struct rollback_data {
3753         const char      *cb_target;             /* the snapshot */
3754         uint64_t        cb_create;              /* creation time reference */
3755         boolean_t       cb_error;
3756         boolean_t       cb_force;
3757 } rollback_data_t;
3758
3759 static int
3760 rollback_destroy_dependent(zfs_handle_t *zhp, void *data)
3761 {
3762         rollback_data_t *cbp = data;
3763         prop_changelist_t *clp;
3764
3765         /* We must destroy this clone; first unmount it */
3766         clp = changelist_gather(zhp, ZFS_PROP_NAME, 0,
3767             cbp->cb_force ? MS_FORCE: 0);
3768         if (clp == NULL || changelist_prefix(clp) != 0) {
3769                 cbp->cb_error = B_TRUE;
3770                 zfs_close(zhp);
3771                 return (0);
3772         }
3773         if (zfs_destroy(zhp, B_FALSE) != 0)
3774                 cbp->cb_error = B_TRUE;
3775         else
3776                 changelist_remove(clp, zhp->zfs_name);
3777         (void) changelist_postfix(clp);
3778         changelist_free(clp);
3779
3780         zfs_close(zhp);
3781         return (0);
3782 }
3783
3784 static int
3785 rollback_destroy(zfs_handle_t *zhp, void *data)
3786 {
3787         rollback_data_t *cbp = data;
3788
3789         if (zfs_prop_get_int(zhp, ZFS_PROP_CREATETXG) > cbp->cb_create) {
3790                 cbp->cb_error |= zfs_iter_dependents(zhp, B_FALSE,
3791                     rollback_destroy_dependent, cbp);
3792
3793                 cbp->cb_error |= zfs_destroy(zhp, B_FALSE);
3794         }
3795
3796         zfs_close(zhp);
3797         return (0);
3798 }
3799
3800 /*
3801  * Given a dataset, rollback to a specific snapshot, discarding any
3802  * data changes since then and making it the active dataset.
3803  *
3804  * Any snapshots and bookmarks more recent than the target are
3805  * destroyed, along with their dependents (i.e. clones).
3806  */
3807 int
3808 zfs_rollback(zfs_handle_t *zhp, zfs_handle_t *snap, boolean_t force)
3809 {
3810         rollback_data_t cb = { 0 };
3811         int err;
3812         boolean_t restore_resv = 0;
3813         uint64_t old_volsize, new_volsize;
3814         zfs_prop_t resv_prop;
3815
3816         assert(zhp->zfs_type == ZFS_TYPE_FILESYSTEM ||
3817             zhp->zfs_type == ZFS_TYPE_VOLUME);
3818
3819         /*
3820          * Destroy all recent snapshots and their dependents.
3821          */
3822         cb.cb_force = force;
3823         cb.cb_target = snap->zfs_name;
3824         cb.cb_create = zfs_prop_get_int(snap, ZFS_PROP_CREATETXG);
3825         (void) zfs_iter_snapshots(zhp, B_FALSE, rollback_destroy, &cb);
3826         (void) zfs_iter_bookmarks(zhp, rollback_destroy, &cb);
3827
3828         if (cb.cb_error)
3829                 return (-1);
3830
3831         /*
3832          * Now that we have verified that the snapshot is the latest,
3833          * rollback to the given snapshot.
3834          */
3835
3836         if (zhp->zfs_type == ZFS_TYPE_VOLUME) {
3837                 if (zfs_which_resv_prop(zhp, &resv_prop) < 0)
3838                         return (-1);
3839                 old_volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE);
3840                 restore_resv =
3841                     (old_volsize == zfs_prop_get_int(zhp, resv_prop));
3842         }
3843
3844         /*
3845          * We rely on zfs_iter_children() to verify that there are no
3846          * newer snapshots for the given dataset.  Therefore, we can
3847          * simply pass the name on to the ioctl() call.  There is still
3848          * an unlikely race condition where the user has taken a
3849          * snapshot since we verified that this was the most recent.
3850          */
3851         err = lzc_rollback(zhp->zfs_name, NULL, 0);
3852         if (err != 0) {
3853                 (void) zfs_standard_error_fmt(zhp->zfs_hdl, errno,
3854                     dgettext(TEXT_DOMAIN, "cannot rollback '%s'"),
3855                     zhp->zfs_name);
3856                 return (err);
3857         }
3858
3859         /*
3860          * For volumes, if the pre-rollback volsize matched the pre-
3861          * rollback reservation and the volsize has changed then set
3862          * the reservation property to the post-rollback volsize.
3863          * Make a new handle since the rollback closed the dataset.
3864          */
3865         if ((zhp->zfs_type == ZFS_TYPE_VOLUME) &&
3866             (zhp = make_dataset_handle(zhp->zfs_hdl, zhp->zfs_name))) {
3867                 if (restore_resv) {
3868                         new_volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE);
3869                         if (old_volsize != new_volsize)
3870                                 err = zfs_prop_set_int(zhp, resv_prop,
3871                                     new_volsize);
3872                 }
3873                 zfs_close(zhp);
3874         }
3875         return (err);
3876 }
3877
3878 /*
3879  * Renames the given dataset.
3880  */
3881 int
3882 zfs_rename(zfs_handle_t *zhp, const char *source, const char *target,
3883     renameflags_t flags)
3884 {
3885         int ret;
3886         zfs_cmd_t zc = { 0 };
3887         char *delim;
3888         prop_changelist_t *cl = NULL;
3889         zfs_handle_t *zhrp = NULL;
3890         char *parentname = NULL;
3891         char parent[ZFS_MAXNAMELEN];
3892         char property[ZFS_MAXPROPLEN];
3893         libzfs_handle_t *hdl = zhp->zfs_hdl;
3894         char errbuf[1024];
3895
3896         /* if we have the same exact name, just return success */
3897         if (strcmp(zhp->zfs_name, target) == 0)
3898                 return (0);
3899
3900         (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3901             "cannot rename to '%s'"), target);
3902
3903         if (source != NULL) {
3904                 /*
3905                  * This is recursive snapshots rename, put snapshot name
3906                  * (that might not exist) into zfs_name.
3907                  */
3908                 assert(flags.recurse);
3909
3910                 (void) strlcat(zhp->zfs_name, "@", sizeof(zhp->zfs_name));
3911                 (void) strlcat(zhp->zfs_name, source, sizeof(zhp->zfs_name));
3912                 zhp->zfs_type = ZFS_TYPE_SNAPSHOT;
3913         }
3914
3915         /*
3916          * Make sure the target name is valid
3917          */
3918         if (zhp->zfs_type == ZFS_TYPE_SNAPSHOT) {
3919                 if ((strchr(target, '@') == NULL) ||
3920                     *target == '@') {
3921                         /*
3922                          * Snapshot target name is abbreviated,
3923                          * reconstruct full dataset name
3924                          */
3925                         (void) strlcpy(parent, zhp->zfs_name,
3926                             sizeof (parent));
3927                         delim = strchr(parent, '@');
3928                         if (strchr(target, '@') == NULL)
3929                                 *(++delim) = '\0';
3930                         else
3931                                 *delim = '\0';
3932                         (void) strlcat(parent, target, sizeof (parent));
3933                         target = parent;
3934                 } else {
3935                         /*
3936                          * Make sure we're renaming within the same dataset.
3937                          */
3938                         delim = strchr(target, '@');
3939                         if (strncmp(zhp->zfs_name, target, delim - target)
3940                             != 0 || zhp->zfs_name[delim - target] != '@') {
3941                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3942                                     "snapshots must be part of same "
3943                                     "dataset"));
3944                                 return (zfs_error(hdl, EZFS_CROSSTARGET,
3945                                     errbuf));
3946                         }
3947                 }
3948                 if (!zfs_validate_name(hdl, target, zhp->zfs_type, B_TRUE))
3949                         return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3950         } else {
3951                 if (flags.recurse) {
3952                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3953                             "recursive rename must be a snapshot"));
3954                         return (zfs_error(hdl, EZFS_BADTYPE, errbuf));
3955                 }
3956
3957                 if (!zfs_validate_name(hdl, target, zhp->zfs_type, B_TRUE))
3958                         return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3959
3960                 /* validate parents */
3961                 if (check_parents(hdl, target, NULL, B_FALSE, NULL) != 0)
3962                         return (-1);
3963
3964                 /* make sure we're in the same pool */
3965                 verify((delim = strchr(target, '/')) != NULL);
3966                 if (strncmp(zhp->zfs_name, target, delim - target) != 0 ||
3967                     zhp->zfs_name[delim - target] != '/') {
3968                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3969                             "datasets must be within same pool"));
3970                         return (zfs_error(hdl, EZFS_CROSSTARGET, errbuf));
3971                 }
3972
3973                 /* new name cannot be a child of the current dataset name */
3974                 if (is_descendant(zhp->zfs_name, target)) {
3975                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3976                             "New dataset name cannot be a descendant of "
3977                             "current dataset name"));
3978                         return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3979                 }
3980         }
3981
3982         (void) snprintf(errbuf, sizeof (errbuf),
3983             dgettext(TEXT_DOMAIN, "cannot rename '%s'"), zhp->zfs_name);
3984
3985         if (getzoneid() == GLOBAL_ZONEID &&
3986             zfs_prop_get_int(zhp, ZFS_PROP_ZONED)) {
3987                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3988                     "dataset is used in a non-global zone"));
3989                 return (zfs_error(hdl, EZFS_ZONED, errbuf));
3990         }
3991
3992         /*
3993          * Avoid unmounting file systems with mountpoint property set to
3994          * 'legacy' or 'none' even if -u option is not given.
3995          */
3996         if (zhp->zfs_type == ZFS_TYPE_FILESYSTEM &&
3997             !flags.recurse && !flags.nounmount &&
3998             zfs_prop_get(zhp, ZFS_PROP_MOUNTPOINT, property,
3999             sizeof (property), NULL, NULL, 0, B_FALSE) == 0 &&
4000             (strcmp(property, "legacy") == 0 ||
4001              strcmp(property, "none") == 0)) {
4002                 flags.nounmount = B_TRUE;
4003         }
4004         if (flags.recurse) {
4005
4006                 parentname = zfs_strdup(zhp->zfs_hdl, zhp->zfs_name);
4007                 if (parentname == NULL) {
4008                         ret = -1;
4009                         goto error;
4010                 }
4011                 delim = strchr(parentname, '@');
4012                 *delim = '\0';
4013                 zhrp = zfs_open(zhp->zfs_hdl, parentname, ZFS_TYPE_DATASET);
4014                 if (zhrp == NULL) {
4015                         ret = -1;
4016                         goto error;
4017                 }
4018         } else if (zhp->zfs_type != ZFS_TYPE_SNAPSHOT) {
4019                 if ((cl = changelist_gather(zhp, ZFS_PROP_NAME,
4020                     flags.nounmount ? CL_GATHER_DONT_UNMOUNT : 0,
4021                     flags.forceunmount ? MS_FORCE : 0)) == NULL) {
4022                         return (-1);
4023                 }
4024
4025                 if (changelist_haszonedchild(cl)) {
4026                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4027                             "child dataset with inherited mountpoint is used "
4028                             "in a non-global zone"));
4029                         (void) zfs_error(hdl, EZFS_ZONED, errbuf);
4030                         goto error;
4031                 }
4032
4033                 if ((ret = changelist_prefix(cl)) != 0)
4034                         goto error;
4035         }
4036
4037         if (ZFS_IS_VOLUME(zhp))
4038                 zc.zc_objset_type = DMU_OST_ZVOL;
4039         else
4040                 zc.zc_objset_type = DMU_OST_ZFS;
4041
4042         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
4043         (void) strlcpy(zc.zc_value, target, sizeof (zc.zc_value));
4044
4045         zc.zc_cookie = flags.recurse ? 1 : 0;
4046         if (flags.nounmount)
4047                 zc.zc_cookie |= 2;
4048
4049         if ((ret = zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_RENAME, &zc)) != 0) {
4050                 /*
4051                  * if it was recursive, the one that actually failed will
4052                  * be in zc.zc_name
4053                  */
4054                 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
4055                     "cannot rename '%s'"), zc.zc_name);
4056
4057                 if (flags.recurse && errno == EEXIST) {
4058                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4059                             "a child dataset already has a snapshot "
4060                             "with the new name"));
4061                         (void) zfs_error(hdl, EZFS_EXISTS, errbuf);
4062                 } else {
4063                         (void) zfs_standard_error(zhp->zfs_hdl, errno, errbuf);
4064                 }
4065
4066                 /*
4067                  * On failure, we still want to remount any filesystems that
4068                  * were previously mounted, so we don't alter the system state.
4069                  */
4070                 if (cl != NULL)
4071                         (void) changelist_postfix(cl);
4072         } else {
4073                 if (cl != NULL) {
4074                         changelist_rename(cl, zfs_get_name(zhp), target);
4075                         ret = changelist_postfix(cl);
4076                 }
4077         }
4078
4079 error:
4080         if (parentname != NULL) {
4081                 free(parentname);
4082         }
4083         if (zhrp != NULL) {
4084                 zfs_close(zhrp);
4085         }
4086         if (cl != NULL) {
4087                 changelist_free(cl);
4088         }
4089         return (ret);
4090 }
4091
4092 nvlist_t *
4093 zfs_get_user_props(zfs_handle_t *zhp)
4094 {
4095         return (zhp->zfs_user_props);
4096 }
4097
4098 nvlist_t *
4099 zfs_get_recvd_props(zfs_handle_t *zhp)
4100 {
4101         if (zhp->zfs_recvd_props == NULL)
4102                 if (get_recvd_props_ioctl(zhp) != 0)
4103                         return (NULL);
4104         return (zhp->zfs_recvd_props);
4105 }
4106
4107 /*
4108  * This function is used by 'zfs list' to determine the exact set of columns to
4109  * display, and their maximum widths.  This does two main things:
4110  *
4111  *      - If this is a list of all properties, then expand the list to include
4112  *        all native properties, and set a flag so that for each dataset we look
4113  *        for new unique user properties and add them to the list.
4114  *
4115  *      - For non fixed-width properties, keep track of the maximum width seen
4116  *        so that we can size the column appropriately. If the user has
4117  *        requested received property values, we also need to compute the width
4118  *        of the RECEIVED column.
4119  */
4120 int
4121 zfs_expand_proplist(zfs_handle_t *zhp, zprop_list_t **plp, boolean_t received,
4122     boolean_t literal)
4123 {
4124         libzfs_handle_t *hdl = zhp->zfs_hdl;
4125         zprop_list_t *entry;
4126         zprop_list_t **last, **start;
4127         nvlist_t *userprops, *propval;
4128         nvpair_t *elem;
4129         char *strval;
4130         char buf[ZFS_MAXPROPLEN];
4131
4132         if (zprop_expand_list(hdl, plp, ZFS_TYPE_DATASET) != 0)
4133                 return (-1);
4134
4135         userprops = zfs_get_user_props(zhp);
4136
4137         entry = *plp;
4138         if (entry->pl_all && nvlist_next_nvpair(userprops, NULL) != NULL) {
4139                 /*
4140                  * Go through and add any user properties as necessary.  We
4141                  * start by incrementing our list pointer to the first
4142                  * non-native property.
4143                  */
4144                 start = plp;
4145                 while (*start != NULL) {
4146                         if ((*start)->pl_prop == ZPROP_INVAL)
4147                                 break;
4148                         start = &(*start)->pl_next;
4149                 }
4150
4151                 elem = NULL;
4152                 while ((elem = nvlist_next_nvpair(userprops, elem)) != NULL) {
4153                         /*
4154                          * See if we've already found this property in our list.
4155                          */
4156                         for (last = start; *last != NULL;
4157                             last = &(*last)->pl_next) {
4158                                 if (strcmp((*last)->pl_user_prop,
4159                                     nvpair_name(elem)) == 0)
4160                                         break;
4161                         }
4162
4163                         if (*last == NULL) {
4164                                 if ((entry = zfs_alloc(hdl,
4165                                     sizeof (zprop_list_t))) == NULL ||
4166                                     ((entry->pl_user_prop = zfs_strdup(hdl,
4167                                     nvpair_name(elem)))) == NULL) {
4168                                         free(entry);
4169                                         return (-1);
4170                                 }
4171
4172                                 entry->pl_prop = ZPROP_INVAL;
4173                                 entry->pl_width = strlen(nvpair_name(elem));
4174                                 entry->pl_all = B_TRUE;
4175                                 *last = entry;
4176                         }
4177                 }
4178         }
4179
4180         /*
4181          * Now go through and check the width of any non-fixed columns
4182          */
4183         for (entry = *plp; entry != NULL; entry = entry->pl_next) {
4184                 if (entry->pl_fixed && !literal)
4185                         continue;
4186
4187                 if (entry->pl_prop != ZPROP_INVAL) {
4188                         if (zfs_prop_get(zhp, entry->pl_prop,
4189                             buf, sizeof (buf), NULL, NULL, 0, literal) == 0) {
4190                                 if (strlen(buf) > entry->pl_width)
4191                                         entry->pl_width = strlen(buf);
4192                         }
4193                         if (received && zfs_prop_get_recvd(zhp,
4194                             zfs_prop_to_name(entry->pl_prop),
4195                             buf, sizeof (buf), literal) == 0)
4196                                 if (strlen(buf) > entry->pl_recvd_width)
4197                                         entry->pl_recvd_width = strlen(buf);
4198                 } else {
4199                         if (nvlist_lookup_nvlist(userprops, entry->pl_user_prop,
4200                             &propval) == 0) {
4201                                 verify(nvlist_lookup_string(propval,
4202                                     ZPROP_VALUE, &strval) == 0);
4203                                 if (strlen(strval) > entry->pl_width)
4204                                         entry->pl_width = strlen(strval);
4205                         }
4206                         if (received && zfs_prop_get_recvd(zhp,
4207                             entry->pl_user_prop,
4208                             buf, sizeof (buf), literal) == 0)
4209                                 if (strlen(buf) > entry->pl_recvd_width)
4210                                         entry->pl_recvd_width = strlen(buf);
4211                 }
4212         }
4213
4214         return (0);
4215 }
4216
4217 int
4218 zfs_deleg_share_nfs(libzfs_handle_t *hdl, char *dataset, char *path,
4219     char *resource, void *export, void *sharetab,
4220     int sharemax, zfs_share_op_t operation)
4221 {
4222         zfs_cmd_t zc = { 0 };
4223         int error;
4224
4225         (void) strlcpy(zc.zc_name, dataset, sizeof (zc.zc_name));
4226         (void) strlcpy(zc.zc_value, path, sizeof (zc.zc_value));
4227         if (resource)
4228                 (void) strlcpy(zc.zc_string, resource, sizeof (zc.zc_string));
4229         zc.zc_share.z_sharedata = (uint64_t)(uintptr_t)sharetab;
4230         zc.zc_share.z_exportdata = (uint64_t)(uintptr_t)export;
4231         zc.zc_share.z_sharetype = operation;
4232         zc.zc_share.z_sharemax = sharemax;
4233         error = ioctl(hdl->libzfs_fd, ZFS_IOC_SHARE, &zc);
4234         return (error);
4235 }
4236
4237 void
4238 zfs_prune_proplist(zfs_handle_t *zhp, uint8_t *props)
4239 {
4240         nvpair_t *curr;
4241
4242         /*
4243          * Keep a reference to the props-table against which we prune the
4244          * properties.
4245          */
4246         zhp->zfs_props_table = props;
4247
4248         curr = nvlist_next_nvpair(zhp->zfs_props, NULL);
4249
4250         while (curr) {
4251                 zfs_prop_t zfs_prop = zfs_name_to_prop(nvpair_name(curr));
4252                 nvpair_t *next = nvlist_next_nvpair(zhp->zfs_props, curr);
4253
4254                 /*
4255                  * User properties will result in ZPROP_INVAL, and since we
4256                  * only know how to prune standard ZFS properties, we always
4257                  * leave these in the list.  This can also happen if we
4258                  * encounter an unknown DSL property (when running older
4259                  * software, for example).
4260                  */
4261                 if (zfs_prop != ZPROP_INVAL && props[zfs_prop] == B_FALSE)
4262                         (void) nvlist_remove(zhp->zfs_props,
4263                             nvpair_name(curr), nvpair_type(curr));
4264                 curr = next;
4265         }
4266 }
4267
4268 #ifdef sun
4269 static int
4270 zfs_smb_acl_mgmt(libzfs_handle_t *hdl, char *dataset, char *path,
4271     zfs_smb_acl_op_t cmd, char *resource1, char *resource2)
4272 {
4273         zfs_cmd_t zc = { 0 };
4274         nvlist_t *nvlist = NULL;
4275         int error;
4276
4277         (void) strlcpy(zc.zc_name, dataset, sizeof (zc.zc_name));
4278         (void) strlcpy(zc.zc_value, path, sizeof (zc.zc_value));
4279         zc.zc_cookie = (uint64_t)cmd;
4280
4281         if (cmd == ZFS_SMB_ACL_RENAME) {
4282                 if (nvlist_alloc(&nvlist, NV_UNIQUE_NAME, 0) != 0) {
4283                         (void) no_memory(hdl);
4284                         return (0);
4285                 }
4286         }
4287
4288         switch (cmd) {
4289         case ZFS_SMB_ACL_ADD:
4290         case ZFS_SMB_ACL_REMOVE:
4291                 (void) strlcpy(zc.zc_string, resource1, sizeof (zc.zc_string));
4292                 break;
4293         case ZFS_SMB_ACL_RENAME:
4294                 if (nvlist_add_string(nvlist, ZFS_SMB_ACL_SRC,
4295                     resource1) != 0) {
4296                                 (void) no_memory(hdl);
4297                                 return (-1);
4298                 }
4299                 if (nvlist_add_string(nvlist, ZFS_SMB_ACL_TARGET,
4300                     resource2) != 0) {
4301                                 (void) no_memory(hdl);
4302                                 return (-1);
4303                 }
4304                 if (zcmd_write_src_nvlist(hdl, &zc, nvlist) != 0) {
4305                         nvlist_free(nvlist);
4306                         return (-1);
4307                 }
4308                 break;
4309         case ZFS_SMB_ACL_PURGE:
4310                 break;
4311         default:
4312                 return (-1);
4313         }
4314         error = ioctl(hdl->libzfs_fd, ZFS_IOC_SMB_ACL, &zc);
4315         if (nvlist)
4316                 nvlist_free(nvlist);
4317         return (error);
4318 }
4319
4320 int
4321 zfs_smb_acl_add(libzfs_handle_t *hdl, char *dataset,
4322     char *path, char *resource)
4323 {
4324         return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_ADD,
4325             resource, NULL));
4326 }
4327
4328 int
4329 zfs_smb_acl_remove(libzfs_handle_t *hdl, char *dataset,
4330     char *path, char *resource)
4331 {
4332         return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_REMOVE,
4333             resource, NULL));
4334 }
4335
4336 int
4337 zfs_smb_acl_purge(libzfs_handle_t *hdl, char *dataset, char *path)
4338 {
4339         return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_PURGE,
4340             NULL, NULL));
4341 }
4342
4343 int
4344 zfs_smb_acl_rename(libzfs_handle_t *hdl, char *dataset, char *path,
4345     char *oldname, char *newname)
4346 {
4347         return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_RENAME,
4348             oldname, newname));
4349 }
4350 #endif  /* sun */
4351
4352 int
4353 zfs_userspace(zfs_handle_t *zhp, zfs_userquota_prop_t type,
4354     zfs_userspace_cb_t func, void *arg)
4355 {
4356         zfs_cmd_t zc = { 0 };
4357         zfs_useracct_t buf[100];
4358         libzfs_handle_t *hdl = zhp->zfs_hdl;
4359         int ret;
4360
4361         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
4362
4363         zc.zc_objset_type = type;
4364         zc.zc_nvlist_dst = (uintptr_t)buf;
4365
4366         for (;;) {
4367                 zfs_useracct_t *zua = buf;
4368
4369                 zc.zc_nvlist_dst_size = sizeof (buf);
4370                 if (zfs_ioctl(hdl, ZFS_IOC_USERSPACE_MANY, &zc) != 0) {
4371                         char errbuf[1024];
4372
4373                         (void) snprintf(errbuf, sizeof (errbuf),
4374                             dgettext(TEXT_DOMAIN,
4375                             "cannot get used/quota for %s"), zc.zc_name);
4376                         return (zfs_standard_error_fmt(hdl, errno, errbuf));
4377                 }
4378                 if (zc.zc_nvlist_dst_size == 0)
4379                         break;
4380
4381                 while (zc.zc_nvlist_dst_size > 0) {
4382                         if ((ret = func(arg, zua->zu_domain, zua->zu_rid,
4383                             zua->zu_space)) != 0)
4384                                 return (ret);
4385                         zua++;
4386                         zc.zc_nvlist_dst_size -= sizeof (zfs_useracct_t);
4387                 }
4388         }
4389
4390         return (0);
4391 }
4392
4393 struct holdarg {
4394         nvlist_t *nvl;
4395         const char *snapname;
4396         const char *tag;
4397         boolean_t recursive;
4398         int error;
4399 };
4400
4401 static int
4402 zfs_hold_one(zfs_handle_t *zhp, void *arg)
4403 {
4404         struct holdarg *ha = arg;
4405         char name[ZFS_MAXNAMELEN];
4406         int rv = 0;
4407
4408         (void) snprintf(name, sizeof (name),
4409             "%s@%s", zhp->zfs_name, ha->snapname);
4410
4411         if (lzc_exists(name))
4412                 fnvlist_add_string(ha->nvl, name, ha->tag);
4413
4414         if (ha->recursive)
4415                 rv = zfs_iter_filesystems(zhp, zfs_hold_one, ha);
4416         zfs_close(zhp);
4417         return (rv);
4418 }
4419
4420 int
4421 zfs_hold(zfs_handle_t *zhp, const char *snapname, const char *tag,
4422     boolean_t recursive, int cleanup_fd)
4423 {
4424         int ret;
4425         struct holdarg ha;
4426
4427         ha.nvl = fnvlist_alloc();
4428         ha.snapname = snapname;
4429         ha.tag = tag;
4430         ha.recursive = recursive;
4431         (void) zfs_hold_one(zfs_handle_dup(zhp), &ha);
4432
4433         if (nvlist_empty(ha.nvl)) {
4434                 char errbuf[1024];
4435
4436                 fnvlist_free(ha.nvl);
4437                 ret = ENOENT;
4438                 (void) snprintf(errbuf, sizeof (errbuf),
4439                     dgettext(TEXT_DOMAIN,
4440                     "cannot hold snapshot '%s@%s'"),
4441                     zhp->zfs_name, snapname);
4442                 (void) zfs_standard_error(zhp->zfs_hdl, ret, errbuf);
4443                 return (ret);
4444         }
4445
4446         ret = zfs_hold_nvl(zhp, cleanup_fd, ha.nvl);
4447         fnvlist_free(ha.nvl);
4448
4449         return (ret);
4450 }
4451
4452 int
4453 zfs_hold_nvl(zfs_handle_t *zhp, int cleanup_fd, nvlist_t *holds)
4454 {
4455         int ret;
4456         nvlist_t *errors;
4457         libzfs_handle_t *hdl = zhp->zfs_hdl;
4458         char errbuf[1024];
4459         nvpair_t *elem;
4460
4461         errors = NULL;
4462         ret = lzc_hold(holds, cleanup_fd, &errors);
4463
4464         if (ret == 0) {
4465                 /* There may be errors even in the success case. */
4466                 fnvlist_free(errors);
4467                 return (0);
4468         }
4469
4470         if (nvlist_empty(errors)) {
4471                 /* no hold-specific errors */
4472                 (void) snprintf(errbuf, sizeof (errbuf),
4473                     dgettext(TEXT_DOMAIN, "cannot hold"));
4474                 switch (ret) {
4475                 case ENOTSUP:
4476                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4477                             "pool must be upgraded"));
4478                         (void) zfs_error(hdl, EZFS_BADVERSION, errbuf);
4479                         break;
4480                 case EINVAL:
4481                         (void) zfs_error(hdl, EZFS_BADTYPE, errbuf);
4482                         break;
4483                 default:
4484                         (void) zfs_standard_error(hdl, ret, errbuf);
4485                 }
4486         }
4487
4488         for (elem = nvlist_next_nvpair(errors, NULL);
4489             elem != NULL;
4490             elem = nvlist_next_nvpair(errors, elem)) {
4491                 (void) snprintf(errbuf, sizeof (errbuf),
4492                     dgettext(TEXT_DOMAIN,
4493                     "cannot hold snapshot '%s'"), nvpair_name(elem));
4494                 switch (fnvpair_value_int32(elem)) {
4495                 case E2BIG:
4496                         /*
4497                          * Temporary tags wind up having the ds object id
4498                          * prepended. So even if we passed the length check
4499                          * above, it's still possible for the tag to wind
4500                          * up being slightly too long.
4501                          */
4502                         (void) zfs_error(hdl, EZFS_TAGTOOLONG, errbuf);
4503                         break;
4504                 case EINVAL:
4505                         (void) zfs_error(hdl, EZFS_BADTYPE, errbuf);
4506                         break;
4507                 case EEXIST:
4508                         (void) zfs_error(hdl, EZFS_REFTAG_HOLD, errbuf);
4509                         break;
4510                 default:
4511                         (void) zfs_standard_error(hdl,
4512                             fnvpair_value_int32(elem), errbuf);
4513                 }
4514         }
4515
4516         fnvlist_free(errors);
4517         return (ret);
4518 }
4519
4520 static int
4521 zfs_release_one(zfs_handle_t *zhp, void *arg)
4522 {
4523         struct holdarg *ha = arg;
4524         char name[ZFS_MAXNAMELEN];
4525         int rv = 0;
4526         nvlist_t *existing_holds;
4527
4528         (void) snprintf(name, sizeof (name),
4529             "%s@%s", zhp->zfs_name, ha->snapname);
4530
4531         if (lzc_get_holds(name, &existing_holds) != 0) {
4532                 ha->error = ENOENT;
4533         } else if (!nvlist_exists(existing_holds, ha->tag)) {
4534                 ha->error = ESRCH;
4535         } else {
4536                 nvlist_t *torelease = fnvlist_alloc();
4537                 fnvlist_add_boolean(torelease, ha->tag);
4538                 fnvlist_add_nvlist(ha->nvl, name, torelease);
4539                 fnvlist_free(torelease);
4540         }
4541
4542         if (ha->recursive)
4543                 rv = zfs_iter_filesystems(zhp, zfs_release_one, ha);
4544         zfs_close(zhp);
4545         return (rv);
4546 }
4547
4548 int
4549 zfs_release(zfs_handle_t *zhp, const char *snapname, const char *tag,
4550     boolean_t recursive)
4551 {
4552         int ret;
4553         struct holdarg ha;
4554         nvlist_t *errors = NULL;
4555         nvpair_t *elem;
4556         libzfs_handle_t *hdl = zhp->zfs_hdl;
4557         char errbuf[1024];
4558
4559         ha.nvl = fnvlist_alloc();
4560         ha.snapname = snapname;
4561         ha.tag = tag;
4562         ha.recursive = recursive;
4563         ha.error = 0;
4564         (void) zfs_release_one(zfs_handle_dup(zhp), &ha);
4565
4566         if (nvlist_empty(ha.nvl)) {
4567                 fnvlist_free(ha.nvl);
4568                 ret = ha.error;
4569                 (void) snprintf(errbuf, sizeof (errbuf),
4570                     dgettext(TEXT_DOMAIN,
4571                     "cannot release hold from snapshot '%s@%s'"),
4572                     zhp->zfs_name, snapname);
4573                 if (ret == ESRCH) {
4574                         (void) zfs_error(hdl, EZFS_REFTAG_RELE, errbuf);
4575                 } else {
4576                         (void) zfs_standard_error(hdl, ret, errbuf);
4577                 }
4578                 return (ret);
4579         }
4580
4581         ret = lzc_release(ha.nvl, &errors);
4582         fnvlist_free(ha.nvl);
4583
4584         if (ret == 0) {
4585                 /* There may be errors even in the success case. */
4586                 fnvlist_free(errors);
4587                 return (0);
4588         }
4589
4590         if (nvlist_empty(errors)) {
4591                 /* no hold-specific errors */
4592                 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
4593                     "cannot release"));
4594                 switch (errno) {
4595                 case ENOTSUP:
4596                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4597                             "pool must be upgraded"));
4598                         (void) zfs_error(hdl, EZFS_BADVERSION, errbuf);
4599                         break;
4600                 default:
4601                         (void) zfs_standard_error_fmt(hdl, errno, errbuf);
4602                 }
4603         }
4604
4605         for (elem = nvlist_next_nvpair(errors, NULL);
4606             elem != NULL;
4607             elem = nvlist_next_nvpair(errors, elem)) {
4608                 (void) snprintf(errbuf, sizeof (errbuf),
4609                     dgettext(TEXT_DOMAIN,
4610                     "cannot release hold from snapshot '%s'"),
4611                     nvpair_name(elem));
4612                 switch (fnvpair_value_int32(elem)) {
4613                 case ESRCH:
4614                         (void) zfs_error(hdl, EZFS_REFTAG_RELE, errbuf);
4615                         break;
4616                 case EINVAL:
4617                         (void) zfs_error(hdl, EZFS_BADTYPE, errbuf);
4618                         break;
4619                 default:
4620                         (void) zfs_standard_error_fmt(hdl,
4621                             fnvpair_value_int32(elem), errbuf);
4622                 }
4623         }
4624
4625         fnvlist_free(errors);
4626         return (ret);
4627 }
4628
4629 int
4630 zfs_get_fsacl(zfs_handle_t *zhp, nvlist_t **nvl)
4631 {
4632         zfs_cmd_t zc = { 0 };
4633         libzfs_handle_t *hdl = zhp->zfs_hdl;
4634         int nvsz = 2048;
4635         void *nvbuf;
4636         int err = 0;
4637         char errbuf[1024];
4638
4639         assert(zhp->zfs_type == ZFS_TYPE_VOLUME ||
4640             zhp->zfs_type == ZFS_TYPE_FILESYSTEM);
4641
4642 tryagain:
4643
4644         nvbuf = malloc(nvsz);
4645         if (nvbuf == NULL) {
4646                 err = (zfs_error(hdl, EZFS_NOMEM, strerror(errno)));
4647                 goto out;
4648         }
4649
4650         zc.zc_nvlist_dst_size = nvsz;
4651         zc.zc_nvlist_dst = (uintptr_t)nvbuf;
4652
4653         (void) strlcpy(zc.zc_name, zhp->zfs_name, ZFS_MAXNAMELEN);
4654
4655         if (ioctl(hdl->libzfs_fd, ZFS_IOC_GET_FSACL, &zc) != 0) {
4656                 (void) snprintf(errbuf, sizeof (errbuf),
4657                     dgettext(TEXT_DOMAIN, "cannot get permissions on '%s'"),
4658                     zc.zc_name);
4659                 switch (errno) {
4660                 case ENOMEM:
4661                         free(nvbuf);
4662                         nvsz = zc.zc_nvlist_dst_size;
4663                         goto tryagain;
4664
4665                 case ENOTSUP:
4666                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4667                             "pool must be upgraded"));
4668                         err = zfs_error(hdl, EZFS_BADVERSION, errbuf);
4669                         break;
4670                 case EINVAL:
4671                         err = zfs_error(hdl, EZFS_BADTYPE, errbuf);
4672                         break;
4673                 case ENOENT:
4674                         err = zfs_error(hdl, EZFS_NOENT, errbuf);
4675                         break;
4676                 default:
4677                         err = zfs_standard_error_fmt(hdl, errno, errbuf);
4678                         break;
4679                 }
4680         } else {
4681                 /* success */
4682                 int rc = nvlist_unpack(nvbuf, zc.zc_nvlist_dst_size, nvl, 0);
4683                 if (rc) {
4684                         (void) snprintf(errbuf, sizeof (errbuf), dgettext(
4685                             TEXT_DOMAIN, "cannot get permissions on '%s'"),
4686                             zc.zc_name);
4687                         err = zfs_standard_error_fmt(hdl, rc, errbuf);
4688                 }
4689         }
4690
4691         free(nvbuf);
4692 out:
4693         return (err);
4694 }
4695
4696 int
4697 zfs_set_fsacl(zfs_handle_t *zhp, boolean_t un, nvlist_t *nvl)
4698 {
4699         zfs_cmd_t zc = { 0 };
4700         libzfs_handle_t *hdl = zhp->zfs_hdl;
4701         char *nvbuf;
4702         char errbuf[1024];
4703         size_t nvsz;
4704         int err;
4705
4706         assert(zhp->zfs_type == ZFS_TYPE_VOLUME ||
4707             zhp->zfs_type == ZFS_TYPE_FILESYSTEM);
4708
4709         err = nvlist_size(nvl, &nvsz, NV_ENCODE_NATIVE);
4710         assert(err == 0);
4711
4712         nvbuf = malloc(nvsz);
4713
4714         err = nvlist_pack(nvl, &nvbuf, &nvsz, NV_ENCODE_NATIVE, 0);
4715         assert(err == 0);
4716
4717         zc.zc_nvlist_src_size = nvsz;
4718         zc.zc_nvlist_src = (uintptr_t)nvbuf;
4719         zc.zc_perm_action = un;
4720
4721         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
4722
4723         if (zfs_ioctl(hdl, ZFS_IOC_SET_FSACL, &zc) != 0) {
4724                 (void) snprintf(errbuf, sizeof (errbuf),
4725                     dgettext(TEXT_DOMAIN, "cannot set permissions on '%s'"),
4726                     zc.zc_name);
4727                 switch (errno) {
4728                 case ENOTSUP:
4729                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4730                             "pool must be upgraded"));
4731                         err = zfs_error(hdl, EZFS_BADVERSION, errbuf);
4732                         break;
4733                 case EINVAL:
4734                         err = zfs_error(hdl, EZFS_BADTYPE, errbuf);
4735                         break;
4736                 case ENOENT:
4737                         err = zfs_error(hdl, EZFS_NOENT, errbuf);
4738                         break;
4739                 default:
4740                         err = zfs_standard_error_fmt(hdl, errno, errbuf);
4741                         break;
4742                 }
4743         }
4744
4745         free(nvbuf);
4746
4747         return (err);
4748 }
4749
4750 int
4751 zfs_get_holds(zfs_handle_t *zhp, nvlist_t **nvl)
4752 {
4753         int err;
4754         char errbuf[1024];
4755
4756         err = lzc_get_holds(zhp->zfs_name, nvl);
4757
4758         if (err != 0) {
4759                 libzfs_handle_t *hdl = zhp->zfs_hdl;
4760
4761                 (void) snprintf(errbuf, sizeof (errbuf),
4762                     dgettext(TEXT_DOMAIN, "cannot get holds for '%s'"),
4763                     zhp->zfs_name);
4764                 switch (err) {
4765                 case ENOTSUP:
4766                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4767                             "pool must be upgraded"));
4768                         err = zfs_error(hdl, EZFS_BADVERSION, errbuf);
4769                         break;
4770                 case EINVAL:
4771                         err = zfs_error(hdl, EZFS_BADTYPE, errbuf);
4772                         break;
4773                 case ENOENT:
4774                         err = zfs_error(hdl, EZFS_NOENT, errbuf);
4775                         break;
4776                 default:
4777                         err = zfs_standard_error_fmt(hdl, errno, errbuf);
4778                         break;
4779                 }
4780         }
4781
4782         return (err);
4783 }
4784
4785 /*
4786  * Convert the zvol's volume size to an appropriate reservation.
4787  * Note: If this routine is updated, it is necessary to update the ZFS test
4788  * suite's shell version in reservation.kshlib.
4789  */
4790 uint64_t
4791 zvol_volsize_to_reservation(uint64_t volsize, nvlist_t *props)
4792 {
4793         uint64_t numdb;
4794         uint64_t nblocks, volblocksize;
4795         int ncopies;
4796         char *strval;
4797
4798         if (nvlist_lookup_string(props,
4799             zfs_prop_to_name(ZFS_PROP_COPIES), &strval) == 0)
4800                 ncopies = atoi(strval);
4801         else
4802                 ncopies = 1;
4803         if (nvlist_lookup_uint64(props,
4804             zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE),
4805             &volblocksize) != 0)
4806                 volblocksize = ZVOL_DEFAULT_BLOCKSIZE;
4807         nblocks = volsize/volblocksize;
4808         /* start with metadnode L0-L6 */
4809         numdb = 7;
4810         /* calculate number of indirects */
4811         while (nblocks > 1) {
4812                 nblocks += DNODES_PER_LEVEL - 1;
4813                 nblocks /= DNODES_PER_LEVEL;
4814                 numdb += nblocks;
4815         }
4816         numdb *= MIN(SPA_DVAS_PER_BP, ncopies + 1);
4817         volsize *= ncopies;
4818         /*
4819          * this is exactly DN_MAX_INDBLKSHIFT when metadata isn't
4820          * compressed, but in practice they compress down to about
4821          * 1100 bytes
4822          */
4823         numdb *= 1ULL << DN_MAX_INDBLKSHIFT;
4824         volsize += numdb;
4825         return (volsize);
4826 }
4827
4828 /*
4829  * Attach/detach the given filesystem to/from the given jail.
4830  */
4831 int
4832 zfs_jail(zfs_handle_t *zhp, int jailid, int attach)
4833 {
4834         libzfs_handle_t *hdl = zhp->zfs_hdl;
4835         zfs_cmd_t zc = { 0 };
4836         char errbuf[1024];
4837         unsigned long cmd;
4838         int ret;
4839
4840         if (attach) {
4841                 (void) snprintf(errbuf, sizeof (errbuf),
4842                     dgettext(TEXT_DOMAIN, "cannot jail '%s'"), zhp->zfs_name);
4843         } else {
4844                 (void) snprintf(errbuf, sizeof (errbuf),
4845                     dgettext(TEXT_DOMAIN, "cannot unjail '%s'"), zhp->zfs_name);
4846         }
4847
4848         switch (zhp->zfs_type) {
4849         case ZFS_TYPE_VOLUME:
4850                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4851                     "volumes can not be jailed"));
4852                 return (zfs_error(hdl, EZFS_BADTYPE, errbuf));
4853         case ZFS_TYPE_SNAPSHOT:
4854                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4855                     "snapshots can not be jailed"));
4856                 return (zfs_error(hdl, EZFS_BADTYPE, errbuf));
4857         }
4858         assert(zhp->zfs_type == ZFS_TYPE_FILESYSTEM);
4859
4860         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
4861         zc.zc_objset_type = DMU_OST_ZFS;
4862         zc.zc_jailid = jailid;
4863
4864         cmd = attach ? ZFS_IOC_JAIL : ZFS_IOC_UNJAIL;
4865         if ((ret = ioctl(hdl->libzfs_fd, cmd, &zc)) != 0)
4866                 zfs_standard_error(hdl, errno, errbuf);
4867
4868         return (ret);
4869 }