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
1407         /*
1408          * If this is an existing volume, and someone is setting the volsize,
1409          * make sure that it matches the reservation, or add it if necessary.
1410          */
1411         old_volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE);
1412         if (zfs_which_resv_prop(zhp, &resv_prop) < 0)
1413                 return (-1);
1414         old_reservation = zfs_prop_get_int(zhp, resv_prop);
1415         if ((zvol_volsize_to_reservation(old_volsize, zhp->zfs_props) !=
1416             old_reservation) || nvlist_lookup_uint64(nvl,
1417             zfs_prop_to_name(resv_prop), &new_reservation) != ENOENT) {
1418                 return (0);
1419         }
1420         if (nvlist_lookup_uint64(nvl, zfs_prop_to_name(ZFS_PROP_VOLSIZE),
1421             &new_volsize) != 0)
1422                 return (-1);
1423         new_reservation = zvol_volsize_to_reservation(new_volsize,
1424             zhp->zfs_props);
1425         if (nvlist_add_uint64(nvl, zfs_prop_to_name(resv_prop),
1426             new_reservation) != 0) {
1427                 (void) no_memory(zhp->zfs_hdl);
1428                 return (-1);
1429         }
1430         return (1);
1431 }
1432
1433 void
1434 zfs_setprop_error(libzfs_handle_t *hdl, zfs_prop_t prop, int err,
1435     char *errbuf)
1436 {
1437         switch (err) {
1438
1439         case ENOSPC:
1440                 /*
1441                  * For quotas and reservations, ENOSPC indicates
1442                  * something different; setting a quota or reservation
1443                  * doesn't use any disk space.
1444                  */
1445                 switch (prop) {
1446                 case ZFS_PROP_QUOTA:
1447                 case ZFS_PROP_REFQUOTA:
1448                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1449                             "size is less than current used or "
1450                             "reserved space"));
1451                         (void) zfs_error(hdl, EZFS_PROPSPACE, errbuf);
1452                         break;
1453
1454                 case ZFS_PROP_RESERVATION:
1455                 case ZFS_PROP_REFRESERVATION:
1456                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1457                             "size is greater than available space"));
1458                         (void) zfs_error(hdl, EZFS_PROPSPACE, errbuf);
1459                         break;
1460
1461                 default:
1462                         (void) zfs_standard_error(hdl, err, errbuf);
1463                         break;
1464                 }
1465                 break;
1466
1467         case EBUSY:
1468                 (void) zfs_standard_error(hdl, EBUSY, errbuf);
1469                 break;
1470
1471         case EROFS:
1472                 (void) zfs_error(hdl, EZFS_DSREADONLY, errbuf);
1473                 break;
1474
1475         case ENOTSUP:
1476                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1477                     "pool and or dataset must be upgraded to set this "
1478                     "property or value"));
1479                 (void) zfs_error(hdl, EZFS_BADVERSION, errbuf);
1480                 break;
1481
1482         case ERANGE:
1483         case EDOM:
1484                 if (prop == ZFS_PROP_COMPRESSION ||
1485                     prop == ZFS_PROP_RECORDSIZE) {
1486                         (void) zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1487                             "property setting is not allowed on "
1488                             "bootable datasets"));
1489                         (void) zfs_error(hdl, EZFS_NOTSUP, errbuf);
1490                 } else if (prop == ZFS_PROP_CHECKSUM ||
1491                     prop == ZFS_PROP_DEDUP) {
1492                         (void) zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1493                             "property setting is not allowed on "
1494                             "root pools"));
1495                         (void) zfs_error(hdl, EZFS_NOTSUP, errbuf);
1496                 } else {
1497                         (void) zfs_standard_error(hdl, err, errbuf);
1498                 }
1499                 break;
1500
1501         case EINVAL:
1502                 if (prop == ZPROP_INVAL) {
1503                         (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1504                 } else {
1505                         (void) zfs_standard_error(hdl, err, errbuf);
1506                 }
1507                 break;
1508
1509         case EOVERFLOW:
1510                 /*
1511                  * This platform can't address a volume this big.
1512                  */
1513 #ifdef _ILP32
1514                 if (prop == ZFS_PROP_VOLSIZE) {
1515                         (void) zfs_error(hdl, EZFS_VOLTOOBIG, errbuf);
1516                         break;
1517                 }
1518 #endif
1519                 /* FALLTHROUGH */
1520         default:
1521                 (void) zfs_standard_error(hdl, err, errbuf);
1522         }
1523 }
1524
1525 /*
1526  * Given a property name and value, set the property for the given dataset.
1527  */
1528 int
1529 zfs_prop_set(zfs_handle_t *zhp, const char *propname, const char *propval)
1530 {
1531         int ret = -1;
1532         char errbuf[1024];
1533         libzfs_handle_t *hdl = zhp->zfs_hdl;
1534         nvlist_t *nvl = NULL;
1535
1536         (void) snprintf(errbuf, sizeof (errbuf),
1537             dgettext(TEXT_DOMAIN, "cannot set property for '%s'"),
1538             zhp->zfs_name);
1539
1540         if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0) != 0 ||
1541             nvlist_add_string(nvl, propname, propval) != 0) {
1542                 (void) no_memory(hdl);
1543                 goto error;
1544         }
1545
1546         ret = zfs_prop_set_list(zhp, nvl);
1547
1548 error:
1549         nvlist_free(nvl);
1550         return (ret);
1551 }
1552
1553
1554
1555 /*
1556  * Given an nvlist of property names and values, set the properties for the
1557  * given dataset.
1558  */
1559 int
1560 zfs_prop_set_list(zfs_handle_t *zhp, nvlist_t *props)
1561 {
1562         zfs_cmd_t zc = { 0 };
1563         int ret = -1;
1564         prop_changelist_t **cls = NULL;
1565         int cl_idx;
1566         char errbuf[1024];
1567         libzfs_handle_t *hdl = zhp->zfs_hdl;
1568         nvlist_t *nvl;
1569         int nvl_len;
1570         int added_resv;
1571
1572         (void) snprintf(errbuf, sizeof (errbuf),
1573             dgettext(TEXT_DOMAIN, "cannot set property for '%s'"),
1574             zhp->zfs_name);
1575
1576         if ((nvl = zfs_valid_proplist(hdl, zhp->zfs_type, props,
1577             zfs_prop_get_int(zhp, ZFS_PROP_ZONED), zhp, errbuf)) == NULL)
1578                 goto error;
1579
1580         /*
1581          * We have to check for any extra properties which need to be added
1582          * before computing the length of the nvlist.
1583          */
1584         for (nvpair_t *elem = nvlist_next_nvpair(nvl, NULL);
1585             elem != NULL;
1586             elem = nvlist_next_nvpair(nvl, elem)) {
1587                 if (zfs_name_to_prop(nvpair_name(elem)) == ZFS_PROP_VOLSIZE &&
1588                     (added_resv = zfs_add_synthetic_resv(zhp, nvl)) == -1) {
1589                         goto error;
1590                 }
1591         }
1592         /*
1593          * Check how many properties we're setting and allocate an array to
1594          * store changelist pointers for postfix().
1595          */
1596         nvl_len = 0;
1597         for (nvpair_t *elem = nvlist_next_nvpair(nvl, NULL);
1598             elem != NULL;
1599             elem = nvlist_next_nvpair(nvl, elem))
1600                 nvl_len++;
1601         if ((cls = calloc(nvl_len, sizeof (prop_changelist_t *))) == NULL)
1602                 goto error;
1603
1604         cl_idx = 0;
1605         for (nvpair_t *elem = nvlist_next_nvpair(nvl, NULL);
1606             elem != NULL;
1607             elem = nvlist_next_nvpair(nvl, elem)) {
1608
1609                 zfs_prop_t prop = zfs_name_to_prop(nvpair_name(elem));
1610
1611                 assert(cl_idx < nvl_len);
1612                 /*
1613                  * We don't want to unmount & remount the dataset when changing
1614                  * its canmount property to 'on' or 'noauto'.  We only use
1615                  * the changelist logic to unmount when setting canmount=off.
1616                  */
1617                 if (!(prop == ZFS_PROP_CANMOUNT &&
1618                     fnvpair_value_uint64(elem) != ZFS_CANMOUNT_OFF)) {
1619                         cls[cl_idx] = changelist_gather(zhp, prop, 0, 0);
1620                         if (cls[cl_idx] == NULL)
1621                                 goto error;
1622                 }
1623
1624                 if (prop == ZFS_PROP_MOUNTPOINT &&
1625                     changelist_haszonedchild(cls[cl_idx])) {
1626                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1627                             "child dataset with inherited mountpoint is used "
1628                             "in a non-global zone"));
1629                         ret = zfs_error(hdl, EZFS_ZONED, errbuf);
1630                         goto error;
1631                 }
1632
1633                 /* We don't support those properties on FreeBSD. */
1634                 switch (prop) {
1635                 case ZFS_PROP_DEVICES:
1636                 case ZFS_PROP_ISCSIOPTIONS:
1637                 case ZFS_PROP_XATTR:
1638                 case ZFS_PROP_VSCAN:
1639                 case ZFS_PROP_NBMAND:
1640                 case ZFS_PROP_MLSLABEL:
1641                         (void) snprintf(errbuf, sizeof (errbuf),
1642                             "property '%s' not supported on FreeBSD",
1643                             nvpair_name(elem));
1644                         ret = zfs_error(hdl, EZFS_PERM, errbuf);
1645                         goto error;
1646                 }
1647
1648                 if (cls[cl_idx] != NULL &&
1649                     (ret = changelist_prefix(cls[cl_idx])) != 0)
1650                         goto error;
1651
1652                 cl_idx++;
1653         }
1654         assert(cl_idx == nvl_len);
1655
1656         /*
1657          * Execute the corresponding ioctl() to set this list of properties.
1658          */
1659         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
1660
1661         if ((ret = zcmd_write_src_nvlist(hdl, &zc, nvl)) != 0 ||
1662             (ret = zcmd_alloc_dst_nvlist(hdl, &zc, 0)) != 0)
1663                 goto error;
1664
1665         ret = zfs_ioctl(hdl, ZFS_IOC_SET_PROP, &zc);
1666
1667         if (ret != 0) {
1668                 /* Get the list of unset properties back and report them. */
1669                 nvlist_t *errorprops = NULL;
1670                 if (zcmd_read_dst_nvlist(hdl, &zc, &errorprops) != 0)
1671                         goto error;
1672                 for (nvpair_t *elem = nvlist_next_nvpair(nvl, NULL);
1673                     elem != NULL;
1674                     elem = nvlist_next_nvpair(nvl, elem)) {
1675                         zfs_prop_t prop = zfs_name_to_prop(nvpair_name(elem));
1676                         zfs_setprop_error(hdl, prop, errno, errbuf);
1677                 }
1678                 nvlist_free(errorprops);
1679
1680                 if (added_resv && errno == ENOSPC) {
1681                         /* clean up the volsize property we tried to set */
1682                         uint64_t old_volsize = zfs_prop_get_int(zhp,
1683                             ZFS_PROP_VOLSIZE);
1684                         nvlist_free(nvl);
1685                         nvl = NULL;
1686                         zcmd_free_nvlists(&zc);
1687
1688                         if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0) != 0)
1689                                 goto error;
1690                         if (nvlist_add_uint64(nvl,
1691                             zfs_prop_to_name(ZFS_PROP_VOLSIZE),
1692                             old_volsize) != 0)
1693                                 goto error;
1694                         if (zcmd_write_src_nvlist(hdl, &zc, nvl) != 0)
1695                                 goto error;
1696                         (void) zfs_ioctl(hdl, ZFS_IOC_SET_PROP, &zc);
1697                 }
1698         } else {
1699                 for (cl_idx = 0; cl_idx < nvl_len; cl_idx++) {
1700                         if (cls[cl_idx] != NULL) {
1701                                 int clp_err = changelist_postfix(cls[cl_idx]);
1702                                 if (clp_err != 0)
1703                                         ret = clp_err;
1704                         }
1705                 }
1706
1707                 /*
1708                  * Refresh the statistics so the new property value
1709                  * is reflected.
1710                  */
1711                 if (ret == 0)
1712                         (void) get_stats(zhp);
1713         }
1714
1715 error:
1716         nvlist_free(nvl);
1717         zcmd_free_nvlists(&zc);
1718         if (cls != NULL) {
1719                 for (cl_idx = 0; cl_idx < nvl_len; cl_idx++) {
1720                         if (cls[cl_idx] != NULL)
1721                                 changelist_free(cls[cl_idx]);
1722                 }
1723                 free(cls);
1724         }
1725         return (ret);
1726 }
1727
1728 /*
1729  * Given a property, inherit the value from the parent dataset, or if received
1730  * is TRUE, revert to the received value, if any.
1731  */
1732 int
1733 zfs_prop_inherit(zfs_handle_t *zhp, const char *propname, boolean_t received)
1734 {
1735         zfs_cmd_t zc = { 0 };
1736         int ret;
1737         prop_changelist_t *cl;
1738         libzfs_handle_t *hdl = zhp->zfs_hdl;
1739         char errbuf[1024];
1740         zfs_prop_t prop;
1741
1742         (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
1743             "cannot inherit %s for '%s'"), propname, zhp->zfs_name);
1744
1745         zc.zc_cookie = received;
1746         if ((prop = zfs_name_to_prop(propname)) == ZPROP_INVAL) {
1747                 /*
1748                  * For user properties, the amount of work we have to do is very
1749                  * small, so just do it here.
1750                  */
1751                 if (!zfs_prop_user(propname)) {
1752                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1753                             "invalid property"));
1754                         return (zfs_error(hdl, EZFS_BADPROP, errbuf));
1755                 }
1756
1757                 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
1758                 (void) strlcpy(zc.zc_value, propname, sizeof (zc.zc_value));
1759
1760                 if (zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_INHERIT_PROP, &zc) != 0)
1761                         return (zfs_standard_error(hdl, errno, errbuf));
1762
1763                 return (0);
1764         }
1765
1766         /*
1767          * Verify that this property is inheritable.
1768          */
1769         if (zfs_prop_readonly(prop))
1770                 return (zfs_error(hdl, EZFS_PROPREADONLY, errbuf));
1771
1772         if (!zfs_prop_inheritable(prop) && !received)
1773                 return (zfs_error(hdl, EZFS_PROPNONINHERIT, errbuf));
1774
1775         /*
1776          * Check to see if the value applies to this type
1777          */
1778         if (!zfs_prop_valid_for_type(prop, zhp->zfs_type))
1779                 return (zfs_error(hdl, EZFS_PROPTYPE, errbuf));
1780
1781         /*
1782          * Normalize the name, to get rid of shorthand abbreviations.
1783          */
1784         propname = zfs_prop_to_name(prop);
1785         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
1786         (void) strlcpy(zc.zc_value, propname, sizeof (zc.zc_value));
1787
1788         if (prop == ZFS_PROP_MOUNTPOINT && getzoneid() == GLOBAL_ZONEID &&
1789             zfs_prop_get_int(zhp, ZFS_PROP_ZONED)) {
1790                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1791                     "dataset is used in a non-global zone"));
1792                 return (zfs_error(hdl, EZFS_ZONED, errbuf));
1793         }
1794
1795         /*
1796          * Determine datasets which will be affected by this change, if any.
1797          */
1798         if ((cl = changelist_gather(zhp, prop, 0, 0)) == NULL)
1799                 return (-1);
1800
1801         if (prop == ZFS_PROP_MOUNTPOINT && changelist_haszonedchild(cl)) {
1802                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1803                     "child dataset with inherited mountpoint is used "
1804                     "in a non-global zone"));
1805                 ret = zfs_error(hdl, EZFS_ZONED, errbuf);
1806                 goto error;
1807         }
1808
1809         if ((ret = changelist_prefix(cl)) != 0)
1810                 goto error;
1811
1812         if ((ret = zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_INHERIT_PROP, &zc)) != 0) {
1813                 return (zfs_standard_error(hdl, errno, errbuf));
1814         } else {
1815
1816                 if ((ret = changelist_postfix(cl)) != 0)
1817                         goto error;
1818
1819                 /*
1820                  * Refresh the statistics so the new property is reflected.
1821                  */
1822                 (void) get_stats(zhp);
1823         }
1824
1825 error:
1826         changelist_free(cl);
1827         return (ret);
1828 }
1829
1830 /*
1831  * True DSL properties are stored in an nvlist.  The following two functions
1832  * extract them appropriately.
1833  */
1834 static uint64_t
1835 getprop_uint64(zfs_handle_t *zhp, zfs_prop_t prop, char **source)
1836 {
1837         nvlist_t *nv;
1838         uint64_t value;
1839
1840         *source = NULL;
1841         if (nvlist_lookup_nvlist(zhp->zfs_props,
1842             zfs_prop_to_name(prop), &nv) == 0) {
1843                 verify(nvlist_lookup_uint64(nv, ZPROP_VALUE, &value) == 0);
1844                 (void) nvlist_lookup_string(nv, ZPROP_SOURCE, source);
1845         } else {
1846                 verify(!zhp->zfs_props_table ||
1847                     zhp->zfs_props_table[prop] == B_TRUE);
1848                 value = zfs_prop_default_numeric(prop);
1849                 *source = "";
1850         }
1851
1852         return (value);
1853 }
1854
1855 static const char *
1856 getprop_string(zfs_handle_t *zhp, zfs_prop_t prop, char **source)
1857 {
1858         nvlist_t *nv;
1859         const char *value;
1860
1861         *source = NULL;
1862         if (nvlist_lookup_nvlist(zhp->zfs_props,
1863             zfs_prop_to_name(prop), &nv) == 0) {
1864                 value = fnvlist_lookup_string(nv, ZPROP_VALUE);
1865                 (void) nvlist_lookup_string(nv, ZPROP_SOURCE, source);
1866         } else {
1867                 verify(!zhp->zfs_props_table ||
1868                     zhp->zfs_props_table[prop] == B_TRUE);
1869                 value = zfs_prop_default_string(prop);
1870                 *source = "";
1871         }
1872
1873         return (value);
1874 }
1875
1876 static boolean_t
1877 zfs_is_recvd_props_mode(zfs_handle_t *zhp)
1878 {
1879         return (zhp->zfs_props == zhp->zfs_recvd_props);
1880 }
1881
1882 static void
1883 zfs_set_recvd_props_mode(zfs_handle_t *zhp, uint64_t *cookie)
1884 {
1885         *cookie = (uint64_t)(uintptr_t)zhp->zfs_props;
1886         zhp->zfs_props = zhp->zfs_recvd_props;
1887 }
1888
1889 static void
1890 zfs_unset_recvd_props_mode(zfs_handle_t *zhp, uint64_t *cookie)
1891 {
1892         zhp->zfs_props = (nvlist_t *)(uintptr_t)*cookie;
1893         *cookie = 0;
1894 }
1895
1896 /*
1897  * Internal function for getting a numeric property.  Both zfs_prop_get() and
1898  * zfs_prop_get_int() are built using this interface.
1899  *
1900  * Certain properties can be overridden using 'mount -o'.  In this case, scan
1901  * the contents of the /etc/mnttab entry, searching for the appropriate options.
1902  * If they differ from the on-disk values, report the current values and mark
1903  * the source "temporary".
1904  */
1905 static int
1906 get_numeric_property(zfs_handle_t *zhp, zfs_prop_t prop, zprop_source_t *src,
1907     char **source, uint64_t *val)
1908 {
1909         zfs_cmd_t zc = { 0 };
1910         nvlist_t *zplprops = NULL;
1911         struct mnttab mnt;
1912         char *mntopt_on = NULL;
1913         char *mntopt_off = NULL;
1914         boolean_t received = zfs_is_recvd_props_mode(zhp);
1915
1916         *source = NULL;
1917
1918         switch (prop) {
1919         case ZFS_PROP_ATIME:
1920                 mntopt_on = MNTOPT_ATIME;
1921                 mntopt_off = MNTOPT_NOATIME;
1922                 break;
1923
1924         case ZFS_PROP_DEVICES:
1925                 mntopt_on = MNTOPT_DEVICES;
1926                 mntopt_off = MNTOPT_NODEVICES;
1927                 break;
1928
1929         case ZFS_PROP_EXEC:
1930                 mntopt_on = MNTOPT_EXEC;
1931                 mntopt_off = MNTOPT_NOEXEC;
1932                 break;
1933
1934         case ZFS_PROP_READONLY:
1935                 mntopt_on = MNTOPT_RO;
1936                 mntopt_off = MNTOPT_RW;
1937                 break;
1938
1939         case ZFS_PROP_SETUID:
1940                 mntopt_on = MNTOPT_SETUID;
1941                 mntopt_off = MNTOPT_NOSETUID;
1942                 break;
1943
1944         case ZFS_PROP_XATTR:
1945                 mntopt_on = MNTOPT_XATTR;
1946                 mntopt_off = MNTOPT_NOXATTR;
1947                 break;
1948
1949         case ZFS_PROP_NBMAND:
1950                 mntopt_on = MNTOPT_NBMAND;
1951                 mntopt_off = MNTOPT_NONBMAND;
1952                 break;
1953         }
1954
1955         /*
1956          * Because looking up the mount options is potentially expensive
1957          * (iterating over all of /etc/mnttab), we defer its calculation until
1958          * we're looking up a property which requires its presence.
1959          */
1960         if (!zhp->zfs_mntcheck &&
1961             (mntopt_on != NULL || prop == ZFS_PROP_MOUNTED)) {
1962                 libzfs_handle_t *hdl = zhp->zfs_hdl;
1963                 struct mnttab entry;
1964
1965                 if (libzfs_mnttab_find(hdl, zhp->zfs_name, &entry) == 0) {
1966                         zhp->zfs_mntopts = zfs_strdup(hdl,
1967                             entry.mnt_mntopts);
1968                         if (zhp->zfs_mntopts == NULL)
1969                                 return (-1);
1970                 }
1971
1972                 zhp->zfs_mntcheck = B_TRUE;
1973         }
1974
1975         if (zhp->zfs_mntopts == NULL)
1976                 mnt.mnt_mntopts = "";
1977         else
1978                 mnt.mnt_mntopts = zhp->zfs_mntopts;
1979
1980         switch (prop) {
1981         case ZFS_PROP_ATIME:
1982         case ZFS_PROP_DEVICES:
1983         case ZFS_PROP_EXEC:
1984         case ZFS_PROP_READONLY:
1985         case ZFS_PROP_SETUID:
1986         case ZFS_PROP_XATTR:
1987         case ZFS_PROP_NBMAND:
1988                 *val = getprop_uint64(zhp, prop, source);
1989
1990                 if (received)
1991                         break;
1992
1993                 if (hasmntopt(&mnt, mntopt_on) && !*val) {
1994                         *val = B_TRUE;
1995                         if (src)
1996                                 *src = ZPROP_SRC_TEMPORARY;
1997                 } else if (hasmntopt(&mnt, mntopt_off) && *val) {
1998                         *val = B_FALSE;
1999                         if (src)
2000                                 *src = ZPROP_SRC_TEMPORARY;
2001                 }
2002                 break;
2003
2004         case ZFS_PROP_CANMOUNT:
2005         case ZFS_PROP_VOLSIZE:
2006         case ZFS_PROP_QUOTA:
2007         case ZFS_PROP_REFQUOTA:
2008         case ZFS_PROP_RESERVATION:
2009         case ZFS_PROP_REFRESERVATION:
2010         case ZFS_PROP_FILESYSTEM_LIMIT:
2011         case ZFS_PROP_SNAPSHOT_LIMIT:
2012         case ZFS_PROP_FILESYSTEM_COUNT:
2013         case ZFS_PROP_SNAPSHOT_COUNT:
2014                 *val = getprop_uint64(zhp, prop, source);
2015
2016                 if (*source == NULL) {
2017                         /* not default, must be local */
2018                         *source = zhp->zfs_name;
2019                 }
2020                 break;
2021
2022         case ZFS_PROP_MOUNTED:
2023                 *val = (zhp->zfs_mntopts != NULL);
2024                 break;
2025
2026         case ZFS_PROP_NUMCLONES:
2027                 *val = zhp->zfs_dmustats.dds_num_clones;
2028                 break;
2029
2030         case ZFS_PROP_VERSION:
2031         case ZFS_PROP_NORMALIZE:
2032         case ZFS_PROP_UTF8ONLY:
2033         case ZFS_PROP_CASE:
2034                 if (!zfs_prop_valid_for_type(prop, zhp->zfs_head_type) ||
2035                     zcmd_alloc_dst_nvlist(zhp->zfs_hdl, &zc, 0) != 0)
2036                         return (-1);
2037                 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
2038                 if (zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_OBJSET_ZPLPROPS, &zc)) {
2039                         zcmd_free_nvlists(&zc);
2040                         return (-1);
2041                 }
2042                 if (zcmd_read_dst_nvlist(zhp->zfs_hdl, &zc, &zplprops) != 0 ||
2043                     nvlist_lookup_uint64(zplprops, zfs_prop_to_name(prop),
2044                     val) != 0) {
2045                         zcmd_free_nvlists(&zc);
2046                         return (-1);
2047                 }
2048                 if (zplprops)
2049                         nvlist_free(zplprops);
2050                 zcmd_free_nvlists(&zc);
2051                 break;
2052
2053         case ZFS_PROP_INCONSISTENT:
2054                 *val = zhp->zfs_dmustats.dds_inconsistent;
2055                 break;
2056
2057         default:
2058                 switch (zfs_prop_get_type(prop)) {
2059                 case PROP_TYPE_NUMBER:
2060                 case PROP_TYPE_INDEX:
2061                         *val = getprop_uint64(zhp, prop, source);
2062                         /*
2063                          * If we tried to use a default value for a
2064                          * readonly property, it means that it was not
2065                          * present.
2066                          */
2067                         if (zfs_prop_readonly(prop) &&
2068                             *source != NULL && (*source)[0] == '\0') {
2069                                 *source = NULL;
2070                         }
2071                         break;
2072
2073                 case PROP_TYPE_STRING:
2074                 default:
2075                         zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN,
2076                             "cannot get non-numeric property"));
2077                         return (zfs_error(zhp->zfs_hdl, EZFS_BADPROP,
2078                             dgettext(TEXT_DOMAIN, "internal error")));
2079                 }
2080         }
2081
2082         return (0);
2083 }
2084
2085 /*
2086  * Calculate the source type, given the raw source string.
2087  */
2088 static void
2089 get_source(zfs_handle_t *zhp, zprop_source_t *srctype, char *source,
2090     char *statbuf, size_t statlen)
2091 {
2092         if (statbuf == NULL || *srctype == ZPROP_SRC_TEMPORARY)
2093                 return;
2094
2095         if (source == NULL) {
2096                 *srctype = ZPROP_SRC_NONE;
2097         } else if (source[0] == '\0') {
2098                 *srctype = ZPROP_SRC_DEFAULT;
2099         } else if (strstr(source, ZPROP_SOURCE_VAL_RECVD) != NULL) {
2100                 *srctype = ZPROP_SRC_RECEIVED;
2101         } else {
2102                 if (strcmp(source, zhp->zfs_name) == 0) {
2103                         *srctype = ZPROP_SRC_LOCAL;
2104                 } else {
2105                         (void) strlcpy(statbuf, source, statlen);
2106                         *srctype = ZPROP_SRC_INHERITED;
2107                 }
2108         }
2109
2110 }
2111
2112 int
2113 zfs_prop_get_recvd(zfs_handle_t *zhp, const char *propname, char *propbuf,
2114     size_t proplen, boolean_t literal)
2115 {
2116         zfs_prop_t prop;
2117         int err = 0;
2118
2119         if (zhp->zfs_recvd_props == NULL)
2120                 if (get_recvd_props_ioctl(zhp) != 0)
2121                         return (-1);
2122
2123         prop = zfs_name_to_prop(propname);
2124
2125         if (prop != ZPROP_INVAL) {
2126                 uint64_t cookie;
2127                 if (!nvlist_exists(zhp->zfs_recvd_props, propname))
2128                         return (-1);
2129                 zfs_set_recvd_props_mode(zhp, &cookie);
2130                 err = zfs_prop_get(zhp, prop, propbuf, proplen,
2131                     NULL, NULL, 0, literal);
2132                 zfs_unset_recvd_props_mode(zhp, &cookie);
2133         } else {
2134                 nvlist_t *propval;
2135                 char *recvdval;
2136                 if (nvlist_lookup_nvlist(zhp->zfs_recvd_props,
2137                     propname, &propval) != 0)
2138                         return (-1);
2139                 verify(nvlist_lookup_string(propval, ZPROP_VALUE,
2140                     &recvdval) == 0);
2141                 (void) strlcpy(propbuf, recvdval, proplen);
2142         }
2143
2144         return (err == 0 ? 0 : -1);
2145 }
2146
2147 static int
2148 get_clones_string(zfs_handle_t *zhp, char *propbuf, size_t proplen)
2149 {
2150         nvlist_t *value;
2151         nvpair_t *pair;
2152
2153         value = zfs_get_clones_nvl(zhp);
2154         if (value == NULL)
2155                 return (-1);
2156
2157         propbuf[0] = '\0';
2158         for (pair = nvlist_next_nvpair(value, NULL); pair != NULL;
2159             pair = nvlist_next_nvpair(value, pair)) {
2160                 if (propbuf[0] != '\0')
2161                         (void) strlcat(propbuf, ",", proplen);
2162                 (void) strlcat(propbuf, nvpair_name(pair), proplen);
2163         }
2164
2165         return (0);
2166 }
2167
2168 struct get_clones_arg {
2169         uint64_t numclones;
2170         nvlist_t *value;
2171         const char *origin;
2172         char buf[ZFS_MAXNAMELEN];
2173 };
2174
2175 int
2176 get_clones_cb(zfs_handle_t *zhp, void *arg)
2177 {
2178         struct get_clones_arg *gca = arg;
2179
2180         if (gca->numclones == 0) {
2181                 zfs_close(zhp);
2182                 return (0);
2183         }
2184
2185         if (zfs_prop_get(zhp, ZFS_PROP_ORIGIN, gca->buf, sizeof (gca->buf),
2186             NULL, NULL, 0, B_TRUE) != 0)
2187                 goto out;
2188         if (strcmp(gca->buf, gca->origin) == 0) {
2189                 fnvlist_add_boolean(gca->value, zfs_get_name(zhp));
2190                 gca->numclones--;
2191         }
2192
2193 out:
2194         (void) zfs_iter_children(zhp, get_clones_cb, gca);
2195         zfs_close(zhp);
2196         return (0);
2197 }
2198
2199 nvlist_t *
2200 zfs_get_clones_nvl(zfs_handle_t *zhp)
2201 {
2202         nvlist_t *nv, *value;
2203
2204         if (nvlist_lookup_nvlist(zhp->zfs_props,
2205             zfs_prop_to_name(ZFS_PROP_CLONES), &nv) != 0) {
2206                 struct get_clones_arg gca;
2207
2208                 /*
2209                  * if this is a snapshot, then the kernel wasn't able
2210                  * to get the clones.  Do it by slowly iterating.
2211                  */
2212                 if (zhp->zfs_type != ZFS_TYPE_SNAPSHOT)
2213                         return (NULL);
2214                 if (nvlist_alloc(&nv, NV_UNIQUE_NAME, 0) != 0)
2215                         return (NULL);
2216                 if (nvlist_alloc(&value, NV_UNIQUE_NAME, 0) != 0) {
2217                         nvlist_free(nv);
2218                         return (NULL);
2219                 }
2220
2221                 gca.numclones = zfs_prop_get_int(zhp, ZFS_PROP_NUMCLONES);
2222                 gca.value = value;
2223                 gca.origin = zhp->zfs_name;
2224
2225                 if (gca.numclones != 0) {
2226                         zfs_handle_t *root;
2227                         char pool[ZFS_MAXNAMELEN];
2228                         char *cp = pool;
2229
2230                         /* get the pool name */
2231                         (void) strlcpy(pool, zhp->zfs_name, sizeof (pool));
2232                         (void) strsep(&cp, "/@");
2233                         root = zfs_open(zhp->zfs_hdl, pool,
2234                             ZFS_TYPE_FILESYSTEM);
2235
2236                         (void) get_clones_cb(root, &gca);
2237                 }
2238
2239                 if (gca.numclones != 0 ||
2240                     nvlist_add_nvlist(nv, ZPROP_VALUE, value) != 0 ||
2241                     nvlist_add_nvlist(zhp->zfs_props,
2242                     zfs_prop_to_name(ZFS_PROP_CLONES), nv) != 0) {
2243                         nvlist_free(nv);
2244                         nvlist_free(value);
2245                         return (NULL);
2246                 }
2247                 nvlist_free(nv);
2248                 nvlist_free(value);
2249                 verify(0 == nvlist_lookup_nvlist(zhp->zfs_props,
2250                     zfs_prop_to_name(ZFS_PROP_CLONES), &nv));
2251         }
2252
2253         verify(nvlist_lookup_nvlist(nv, ZPROP_VALUE, &value) == 0);
2254
2255         return (value);
2256 }
2257
2258 /*
2259  * Retrieve a property from the given object.  If 'literal' is specified, then
2260  * numbers are left as exact values.  Otherwise, numbers are converted to a
2261  * human-readable form.
2262  *
2263  * Returns 0 on success, or -1 on error.
2264  */
2265 int
2266 zfs_prop_get(zfs_handle_t *zhp, zfs_prop_t prop, char *propbuf, size_t proplen,
2267     zprop_source_t *src, char *statbuf, size_t statlen, boolean_t literal)
2268 {
2269         char *source = NULL;
2270         uint64_t val;
2271         const char *str;
2272         const char *strval;
2273         boolean_t received = zfs_is_recvd_props_mode(zhp);
2274
2275         /*
2276          * Check to see if this property applies to our object
2277          */
2278         if (!zfs_prop_valid_for_type(prop, zhp->zfs_type))
2279                 return (-1);
2280
2281         if (received && zfs_prop_readonly(prop))
2282                 return (-1);
2283
2284         if (src)
2285                 *src = ZPROP_SRC_NONE;
2286
2287         switch (prop) {
2288         case ZFS_PROP_CREATION:
2289                 /*
2290                  * 'creation' is a time_t stored in the statistics.  We convert
2291                  * this into a string unless 'literal' is specified.
2292                  */
2293                 {
2294                         val = getprop_uint64(zhp, prop, &source);
2295                         time_t time = (time_t)val;
2296                         struct tm t;
2297
2298                         if (literal ||
2299                             localtime_r(&time, &t) == NULL ||
2300                             strftime(propbuf, proplen, "%a %b %e %k:%M %Y",
2301                             &t) == 0)
2302                                 (void) snprintf(propbuf, proplen, "%llu", val);
2303                 }
2304                 break;
2305
2306         case ZFS_PROP_MOUNTPOINT:
2307                 /*
2308                  * Getting the precise mountpoint can be tricky.
2309                  *
2310                  *  - for 'none' or 'legacy', return those values.
2311                  *  - for inherited mountpoints, we want to take everything
2312                  *    after our ancestor and append it to the inherited value.
2313                  *
2314                  * If the pool has an alternate root, we want to prepend that
2315                  * root to any values we return.
2316                  */
2317
2318                 str = getprop_string(zhp, prop, &source);
2319
2320                 if (str[0] == '/') {
2321                         char buf[MAXPATHLEN];
2322                         char *root = buf;
2323                         const char *relpath;
2324
2325                         /*
2326                          * If we inherit the mountpoint, even from a dataset
2327                          * with a received value, the source will be the path of
2328                          * the dataset we inherit from. If source is
2329                          * ZPROP_SOURCE_VAL_RECVD, the received value is not
2330                          * inherited.
2331                          */
2332                         if (strcmp(source, ZPROP_SOURCE_VAL_RECVD) == 0) {
2333                                 relpath = "";
2334                         } else {
2335                                 relpath = zhp->zfs_name + strlen(source);
2336                                 if (relpath[0] == '/')
2337                                         relpath++;
2338                         }
2339
2340                         if ((zpool_get_prop(zhp->zpool_hdl,
2341                             ZPOOL_PROP_ALTROOT, buf, MAXPATHLEN, NULL,
2342                             B_FALSE)) || (strcmp(root, "-") == 0))
2343                                 root[0] = '\0';
2344                         /*
2345                          * Special case an alternate root of '/'. This will
2346                          * avoid having multiple leading slashes in the
2347                          * mountpoint path.
2348                          */
2349                         if (strcmp(root, "/") == 0)
2350                                 root++;
2351
2352                         /*
2353                          * If the mountpoint is '/' then skip over this
2354                          * if we are obtaining either an alternate root or
2355                          * an inherited mountpoint.
2356                          */
2357                         if (str[1] == '\0' && (root[0] != '\0' ||
2358                             relpath[0] != '\0'))
2359                                 str++;
2360
2361                         if (relpath[0] == '\0')
2362                                 (void) snprintf(propbuf, proplen, "%s%s",
2363                                     root, str);
2364                         else
2365                                 (void) snprintf(propbuf, proplen, "%s%s%s%s",
2366                                     root, str, relpath[0] == '@' ? "" : "/",
2367                                     relpath);
2368                 } else {
2369                         /* 'legacy' or 'none' */
2370                         (void) strlcpy(propbuf, str, proplen);
2371                 }
2372
2373                 break;
2374
2375         case ZFS_PROP_ORIGIN:
2376                 str = getprop_string(zhp, prop, &source);
2377                 if (str == NULL)
2378                         return (-1);
2379                 (void) strlcpy(propbuf, str, proplen);
2380                 break;
2381
2382         case ZFS_PROP_CLONES:
2383                 if (get_clones_string(zhp, propbuf, proplen) != 0)
2384                         return (-1);
2385                 break;
2386
2387         case ZFS_PROP_QUOTA:
2388         case ZFS_PROP_REFQUOTA:
2389         case ZFS_PROP_RESERVATION:
2390         case ZFS_PROP_REFRESERVATION:
2391
2392                 if (get_numeric_property(zhp, prop, src, &source, &val) != 0)
2393                         return (-1);
2394
2395                 /*
2396                  * If quota or reservation is 0, we translate this into 'none'
2397                  * (unless literal is set), and indicate that it's the default
2398                  * value.  Otherwise, we print the number nicely and indicate
2399                  * that its set locally.
2400                  */
2401                 if (val == 0) {
2402                         if (literal)
2403                                 (void) strlcpy(propbuf, "0", proplen);
2404                         else
2405                                 (void) strlcpy(propbuf, "none", proplen);
2406                 } else {
2407                         if (literal)
2408                                 (void) snprintf(propbuf, proplen, "%llu",
2409                                     (u_longlong_t)val);
2410                         else
2411                                 zfs_nicenum(val, propbuf, proplen);
2412                 }
2413                 break;
2414
2415         case ZFS_PROP_FILESYSTEM_LIMIT:
2416         case ZFS_PROP_SNAPSHOT_LIMIT:
2417         case ZFS_PROP_FILESYSTEM_COUNT:
2418         case ZFS_PROP_SNAPSHOT_COUNT:
2419
2420                 if (get_numeric_property(zhp, prop, src, &source, &val) != 0)
2421                         return (-1);
2422
2423                 /*
2424                  * If limit is UINT64_MAX, we translate this into 'none' (unless
2425                  * literal is set), and indicate that it's the default value.
2426                  * Otherwise, we print the number nicely and indicate that it's
2427                  * set locally.
2428                  */
2429                 if (literal) {
2430                         (void) snprintf(propbuf, proplen, "%llu",
2431                             (u_longlong_t)val);
2432                 } else if (val == UINT64_MAX) {
2433                         (void) strlcpy(propbuf, "none", proplen);
2434                 } else {
2435                         zfs_nicenum(val, propbuf, proplen);
2436                 }
2437                 break;
2438
2439         case ZFS_PROP_REFRATIO:
2440         case ZFS_PROP_COMPRESSRATIO:
2441                 if (get_numeric_property(zhp, prop, src, &source, &val) != 0)
2442                         return (-1);
2443                 (void) snprintf(propbuf, proplen, "%llu.%02llux",
2444                     (u_longlong_t)(val / 100),
2445                     (u_longlong_t)(val % 100));
2446                 break;
2447
2448         case ZFS_PROP_TYPE:
2449                 switch (zhp->zfs_type) {
2450                 case ZFS_TYPE_FILESYSTEM:
2451                         str = "filesystem";
2452                         break;
2453                 case ZFS_TYPE_VOLUME:
2454                         str = "volume";
2455                         break;
2456                 case ZFS_TYPE_SNAPSHOT:
2457                         str = "snapshot";
2458                         break;
2459                 case ZFS_TYPE_BOOKMARK:
2460                         str = "bookmark";
2461                         break;
2462                 default:
2463                         abort();
2464                 }
2465                 (void) snprintf(propbuf, proplen, "%s", str);
2466                 break;
2467
2468         case ZFS_PROP_MOUNTED:
2469                 /*
2470                  * The 'mounted' property is a pseudo-property that described
2471                  * whether the filesystem is currently mounted.  Even though
2472                  * it's a boolean value, the typical values of "on" and "off"
2473                  * don't make sense, so we translate to "yes" and "no".
2474                  */
2475                 if (get_numeric_property(zhp, ZFS_PROP_MOUNTED,
2476                     src, &source, &val) != 0)
2477                         return (-1);
2478                 if (val)
2479                         (void) strlcpy(propbuf, "yes", proplen);
2480                 else
2481                         (void) strlcpy(propbuf, "no", proplen);
2482                 break;
2483
2484         case ZFS_PROP_NAME:
2485                 /*
2486                  * The 'name' property is a pseudo-property derived from the
2487                  * dataset name.  It is presented as a real property to simplify
2488                  * consumers.
2489                  */
2490                 (void) strlcpy(propbuf, zhp->zfs_name, proplen);
2491                 break;
2492
2493         case ZFS_PROP_MLSLABEL:
2494                 {
2495 #ifdef sun
2496                         m_label_t *new_sl = NULL;
2497                         char *ascii = NULL;     /* human readable label */
2498
2499                         (void) strlcpy(propbuf,
2500                             getprop_string(zhp, prop, &source), proplen);
2501
2502                         if (literal || (strcasecmp(propbuf,
2503                             ZFS_MLSLABEL_DEFAULT) == 0))
2504                                 break;
2505
2506                         /*
2507                          * Try to translate the internal hex string to
2508                          * human-readable output.  If there are any
2509                          * problems just use the hex string.
2510                          */
2511
2512                         if (str_to_label(propbuf, &new_sl, MAC_LABEL,
2513                             L_NO_CORRECTION, NULL) == -1) {
2514                                 m_label_free(new_sl);
2515                                 break;
2516                         }
2517
2518                         if (label_to_str(new_sl, &ascii, M_LABEL,
2519                             DEF_NAMES) != 0) {
2520                                 if (ascii)
2521                                         free(ascii);
2522                                 m_label_free(new_sl);
2523                                 break;
2524                         }
2525                         m_label_free(new_sl);
2526
2527                         (void) strlcpy(propbuf, ascii, proplen);
2528                         free(ascii);
2529 #else   /* !sun */
2530                         propbuf[0] = '\0';
2531 #endif  /* !sun */
2532                 }
2533                 break;
2534
2535         case ZFS_PROP_GUID:
2536                 /*
2537                  * GUIDs are stored as numbers, but they are identifiers.
2538                  * We don't want them to be pretty printed, because pretty
2539                  * printing mangles the ID into a truncated and useless value.
2540                  */
2541                 if (get_numeric_property(zhp, prop, src, &source, &val) != 0)
2542                         return (-1);
2543                 (void) snprintf(propbuf, proplen, "%llu", (u_longlong_t)val);
2544                 break;
2545
2546         default:
2547                 switch (zfs_prop_get_type(prop)) {
2548                 case PROP_TYPE_NUMBER:
2549                         if (get_numeric_property(zhp, prop, src,
2550                             &source, &val) != 0)
2551                                 return (-1);
2552                         if (literal)
2553                                 (void) snprintf(propbuf, proplen, "%llu",
2554                                     (u_longlong_t)val);
2555                         else
2556                                 zfs_nicenum(val, propbuf, proplen);
2557                         break;
2558
2559                 case PROP_TYPE_STRING:
2560                         str = getprop_string(zhp, prop, &source);
2561                         if (str == NULL)
2562                                 return (-1);
2563                         (void) strlcpy(propbuf, str, proplen);
2564                         break;
2565
2566                 case PROP_TYPE_INDEX:
2567                         if (get_numeric_property(zhp, prop, src,
2568                             &source, &val) != 0)
2569                                 return (-1);
2570                         if (zfs_prop_index_to_string(prop, val, &strval) != 0)
2571                                 return (-1);
2572                         (void) strlcpy(propbuf, strval, proplen);
2573                         break;
2574
2575                 default:
2576                         abort();
2577                 }
2578         }
2579
2580         get_source(zhp, src, source, statbuf, statlen);
2581
2582         return (0);
2583 }
2584
2585 /*
2586  * Utility function to get the given numeric property.  Does no validation that
2587  * the given property is the appropriate type; should only be used with
2588  * hard-coded property types.
2589  */
2590 uint64_t
2591 zfs_prop_get_int(zfs_handle_t *zhp, zfs_prop_t prop)
2592 {
2593         char *source;
2594         uint64_t val;
2595
2596         (void) get_numeric_property(zhp, prop, NULL, &source, &val);
2597
2598         return (val);
2599 }
2600
2601 int
2602 zfs_prop_set_int(zfs_handle_t *zhp, zfs_prop_t prop, uint64_t val)
2603 {
2604         char buf[64];
2605
2606         (void) snprintf(buf, sizeof (buf), "%llu", (longlong_t)val);
2607         return (zfs_prop_set(zhp, zfs_prop_to_name(prop), buf));
2608 }
2609
2610 /*
2611  * Similar to zfs_prop_get(), but returns the value as an integer.
2612  */
2613 int
2614 zfs_prop_get_numeric(zfs_handle_t *zhp, zfs_prop_t prop, uint64_t *value,
2615     zprop_source_t *src, char *statbuf, size_t statlen)
2616 {
2617         char *source;
2618
2619         /*
2620          * Check to see if this property applies to our object
2621          */
2622         if (!zfs_prop_valid_for_type(prop, zhp->zfs_type)) {
2623                 return (zfs_error_fmt(zhp->zfs_hdl, EZFS_PROPTYPE,
2624                     dgettext(TEXT_DOMAIN, "cannot get property '%s'"),
2625                     zfs_prop_to_name(prop)));
2626         }
2627
2628         if (src)
2629                 *src = ZPROP_SRC_NONE;
2630
2631         if (get_numeric_property(zhp, prop, src, &source, value) != 0)
2632                 return (-1);
2633
2634         get_source(zhp, src, source, statbuf, statlen);
2635
2636         return (0);
2637 }
2638
2639 static int
2640 idmap_id_to_numeric_domain_rid(uid_t id, boolean_t isuser,
2641     char **domainp, idmap_rid_t *ridp)
2642 {
2643 #ifdef sun
2644         idmap_get_handle_t *get_hdl = NULL;
2645         idmap_stat status;
2646         int err = EINVAL;
2647
2648         if (idmap_get_create(&get_hdl) != IDMAP_SUCCESS)
2649                 goto out;
2650
2651         if (isuser) {
2652                 err = idmap_get_sidbyuid(get_hdl, id,
2653                     IDMAP_REQ_FLG_USE_CACHE, domainp, ridp, &status);
2654         } else {
2655                 err = idmap_get_sidbygid(get_hdl, id,
2656                     IDMAP_REQ_FLG_USE_CACHE, domainp, ridp, &status);
2657         }
2658         if (err == IDMAP_SUCCESS &&
2659             idmap_get_mappings(get_hdl) == IDMAP_SUCCESS &&
2660             status == IDMAP_SUCCESS)
2661                 err = 0;
2662         else
2663                 err = EINVAL;
2664 out:
2665         if (get_hdl)
2666                 idmap_get_destroy(get_hdl);
2667         return (err);
2668 #else   /* !sun */
2669         assert(!"invalid code path");
2670         return (EINVAL); // silence compiler warning
2671 #endif  /* !sun */
2672 }
2673
2674 /*
2675  * convert the propname into parameters needed by kernel
2676  * Eg: userquota@ahrens -> ZFS_PROP_USERQUOTA, "", 126829
2677  * Eg: userused@matt@domain -> ZFS_PROP_USERUSED, "S-1-123-456", 789
2678  */
2679 static int
2680 userquota_propname_decode(const char *propname, boolean_t zoned,
2681     zfs_userquota_prop_t *typep, char *domain, int domainlen, uint64_t *ridp)
2682 {
2683         zfs_userquota_prop_t type;
2684         char *cp, *end;
2685         char *numericsid = NULL;
2686         boolean_t isuser;
2687
2688         domain[0] = '\0';
2689         *ridp = 0;
2690         /* Figure out the property type ({user|group}{quota|space}) */
2691         for (type = 0; type < ZFS_NUM_USERQUOTA_PROPS; type++) {
2692                 if (strncmp(propname, zfs_userquota_prop_prefixes[type],
2693                     strlen(zfs_userquota_prop_prefixes[type])) == 0)
2694                         break;
2695         }
2696         if (type == ZFS_NUM_USERQUOTA_PROPS)
2697                 return (EINVAL);
2698         *typep = type;
2699
2700         isuser = (type == ZFS_PROP_USERQUOTA ||
2701             type == ZFS_PROP_USERUSED);
2702
2703         cp = strchr(propname, '@') + 1;
2704
2705         if (strchr(cp, '@')) {
2706 #ifdef sun
2707                 /*
2708                  * It's a SID name (eg "user@domain") that needs to be
2709                  * turned into S-1-domainID-RID.
2710                  */
2711                 int flag = 0;
2712                 idmap_stat stat, map_stat;
2713                 uid_t pid;
2714                 idmap_rid_t rid;
2715                 idmap_get_handle_t *gh = NULL;
2716
2717                 stat = idmap_get_create(&gh);
2718                 if (stat != IDMAP_SUCCESS) {
2719                         idmap_get_destroy(gh);
2720                         return (ENOMEM);
2721                 }
2722                 if (zoned && getzoneid() == GLOBAL_ZONEID)
2723                         return (ENOENT);
2724                 if (isuser) {
2725                         stat = idmap_getuidbywinname(cp, NULL, flag, &pid);
2726                         if (stat < 0)
2727                                 return (ENOENT);
2728                         stat = idmap_get_sidbyuid(gh, pid, flag, &numericsid,
2729                             &rid, &map_stat);
2730                 } else {
2731                         stat = idmap_getgidbywinname(cp, NULL, flag, &pid);
2732                         if (stat < 0)
2733                                 return (ENOENT);
2734                         stat = idmap_get_sidbygid(gh, pid, flag, &numericsid,
2735                             &rid, &map_stat);
2736                 }
2737                 if (stat < 0) {
2738                         idmap_get_destroy(gh);
2739                         return (ENOENT);
2740                 }
2741                 stat = idmap_get_mappings(gh);
2742                 idmap_get_destroy(gh);
2743
2744                 if (stat < 0) {
2745                         return (ENOENT);
2746                 }
2747                 if (numericsid == NULL)
2748                         return (ENOENT);
2749                 cp = numericsid;
2750                 *ridp = rid;
2751                 /* will be further decoded below */
2752 #else   /* !sun */
2753                 return (ENOENT);
2754 #endif  /* !sun */
2755         }
2756
2757         if (strncmp(cp, "S-1-", 4) == 0) {
2758                 /* It's a numeric SID (eg "S-1-234-567-89") */
2759                 (void) strlcpy(domain, cp, domainlen);
2760                 errno = 0;
2761                 if (*ridp == 0) {
2762                         cp = strrchr(domain, '-');
2763                         *cp = '\0';
2764                         cp++;
2765                         *ridp = strtoull(cp, &end, 10);
2766                 } else {
2767                         end = "";
2768                 }
2769                 if (numericsid) {
2770                         free(numericsid);
2771                         numericsid = NULL;
2772                 }
2773                 if (errno != 0 || *end != '\0')
2774                         return (EINVAL);
2775         } else if (!isdigit(*cp)) {
2776                 /*
2777                  * It's a user/group name (eg "user") that needs to be
2778                  * turned into a uid/gid
2779                  */
2780                 if (zoned && getzoneid() == GLOBAL_ZONEID)
2781                         return (ENOENT);
2782                 if (isuser) {
2783                         struct passwd *pw;
2784                         pw = getpwnam(cp);
2785                         if (pw == NULL)
2786                                 return (ENOENT);
2787                         *ridp = pw->pw_uid;
2788                 } else {
2789                         struct group *gr;
2790                         gr = getgrnam(cp);
2791                         if (gr == NULL)
2792                                 return (ENOENT);
2793                         *ridp = gr->gr_gid;
2794                 }
2795         } else {
2796                 /* It's a user/group ID (eg "12345"). */
2797                 uid_t id = strtoul(cp, &end, 10);
2798                 idmap_rid_t rid;
2799                 char *mapdomain;
2800
2801                 if (*end != '\0')
2802                         return (EINVAL);
2803                 if (id > MAXUID) {
2804                         /* It's an ephemeral ID. */
2805                         if (idmap_id_to_numeric_domain_rid(id, isuser,
2806                             &mapdomain, &rid) != 0)
2807                                 return (ENOENT);
2808                         (void) strlcpy(domain, mapdomain, domainlen);
2809                         *ridp = rid;
2810                 } else {
2811                         *ridp = id;
2812                 }
2813         }
2814
2815         ASSERT3P(numericsid, ==, NULL);
2816         return (0);
2817 }
2818
2819 static int
2820 zfs_prop_get_userquota_common(zfs_handle_t *zhp, const char *propname,
2821     uint64_t *propvalue, zfs_userquota_prop_t *typep)
2822 {
2823         int err;
2824         zfs_cmd_t zc = { 0 };
2825
2826         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
2827
2828         err = userquota_propname_decode(propname,
2829             zfs_prop_get_int(zhp, ZFS_PROP_ZONED),
2830             typep, zc.zc_value, sizeof (zc.zc_value), &zc.zc_guid);
2831         zc.zc_objset_type = *typep;
2832         if (err)
2833                 return (err);
2834
2835         err = ioctl(zhp->zfs_hdl->libzfs_fd, ZFS_IOC_USERSPACE_ONE, &zc);
2836         if (err)
2837                 return (err);
2838
2839         *propvalue = zc.zc_cookie;
2840         return (0);
2841 }
2842
2843 int
2844 zfs_prop_get_userquota_int(zfs_handle_t *zhp, const char *propname,
2845     uint64_t *propvalue)
2846 {
2847         zfs_userquota_prop_t type;
2848
2849         return (zfs_prop_get_userquota_common(zhp, propname, propvalue,
2850             &type));
2851 }
2852
2853 int
2854 zfs_prop_get_userquota(zfs_handle_t *zhp, const char *propname,
2855     char *propbuf, int proplen, boolean_t literal)
2856 {
2857         int err;
2858         uint64_t propvalue;
2859         zfs_userquota_prop_t type;
2860
2861         err = zfs_prop_get_userquota_common(zhp, propname, &propvalue,
2862             &type);
2863
2864         if (err)
2865                 return (err);
2866
2867         if (literal) {
2868                 (void) snprintf(propbuf, proplen, "%llu", propvalue);
2869         } else if (propvalue == 0 &&
2870             (type == ZFS_PROP_USERQUOTA || type == ZFS_PROP_GROUPQUOTA)) {
2871                 (void) strlcpy(propbuf, "none", proplen);
2872         } else {
2873                 zfs_nicenum(propvalue, propbuf, proplen);
2874         }
2875         return (0);
2876 }
2877
2878 int
2879 zfs_prop_get_written_int(zfs_handle_t *zhp, const char *propname,
2880     uint64_t *propvalue)
2881 {
2882         int err;
2883         zfs_cmd_t zc = { 0 };
2884         const char *snapname;
2885
2886         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
2887
2888         snapname = strchr(propname, '@') + 1;
2889         if (strchr(snapname, '@')) {
2890                 (void) strlcpy(zc.zc_value, snapname, sizeof (zc.zc_value));
2891         } else {
2892                 /* snapname is the short name, append it to zhp's fsname */
2893                 char *cp;
2894
2895                 (void) strlcpy(zc.zc_value, zhp->zfs_name,
2896                     sizeof (zc.zc_value));
2897                 cp = strchr(zc.zc_value, '@');
2898                 if (cp != NULL)
2899                         *cp = '\0';
2900                 (void) strlcat(zc.zc_value, "@", sizeof (zc.zc_value));
2901                 (void) strlcat(zc.zc_value, snapname, sizeof (zc.zc_value));
2902         }
2903
2904         err = ioctl(zhp->zfs_hdl->libzfs_fd, ZFS_IOC_SPACE_WRITTEN, &zc);
2905         if (err)
2906                 return (err);
2907
2908         *propvalue = zc.zc_cookie;
2909         return (0);
2910 }
2911
2912 int
2913 zfs_prop_get_written(zfs_handle_t *zhp, const char *propname,
2914     char *propbuf, int proplen, boolean_t literal)
2915 {
2916         int err;
2917         uint64_t propvalue;
2918
2919         err = zfs_prop_get_written_int(zhp, propname, &propvalue);
2920
2921         if (err)
2922                 return (err);
2923
2924         if (literal) {
2925                 (void) snprintf(propbuf, proplen, "%llu", propvalue);
2926         } else {
2927                 zfs_nicenum(propvalue, propbuf, proplen);
2928         }
2929         return (0);
2930 }
2931
2932 /*
2933  * Returns the name of the given zfs handle.
2934  */
2935 const char *
2936 zfs_get_name(const zfs_handle_t *zhp)
2937 {
2938         return (zhp->zfs_name);
2939 }
2940
2941 /*
2942  * Returns the type of the given zfs handle.
2943  */
2944 zfs_type_t
2945 zfs_get_type(const zfs_handle_t *zhp)
2946 {
2947         return (zhp->zfs_type);
2948 }
2949
2950 /*
2951  * Is one dataset name a child dataset of another?
2952  *
2953  * Needs to handle these cases:
2954  * Dataset 1    "a/foo"         "a/foo"         "a/foo"         "a/foo"
2955  * Dataset 2    "a/fo"          "a/foobar"      "a/bar/baz"     "a/foo/bar"
2956  * Descendant?  No.             No.             No.             Yes.
2957  */
2958 static boolean_t
2959 is_descendant(const char *ds1, const char *ds2)
2960 {
2961         size_t d1len = strlen(ds1);
2962
2963         /* ds2 can't be a descendant if it's smaller */
2964         if (strlen(ds2) < d1len)
2965                 return (B_FALSE);
2966
2967         /* otherwise, compare strings and verify that there's a '/' char */
2968         return (ds2[d1len] == '/' && (strncmp(ds1, ds2, d1len) == 0));
2969 }
2970
2971 /*
2972  * Given a complete name, return just the portion that refers to the parent.
2973  * Will return -1 if there is no parent (path is just the name of the
2974  * pool).
2975  */
2976 static int
2977 parent_name(const char *path, char *buf, size_t buflen)
2978 {
2979         char *slashp;
2980
2981         (void) strlcpy(buf, path, buflen);
2982
2983         if ((slashp = strrchr(buf, '/')) == NULL)
2984                 return (-1);
2985         *slashp = '\0';
2986
2987         return (0);
2988 }
2989
2990 /*
2991  * If accept_ancestor is false, then check to make sure that the given path has
2992  * a parent, and that it exists.  If accept_ancestor is true, then find the
2993  * closest existing ancestor for the given path.  In prefixlen return the
2994  * length of already existing prefix of the given path.  We also fetch the
2995  * 'zoned' property, which is used to validate property settings when creating
2996  * new datasets.
2997  */
2998 static int
2999 check_parents(libzfs_handle_t *hdl, const char *path, uint64_t *zoned,
3000     boolean_t accept_ancestor, int *prefixlen)
3001 {
3002         zfs_cmd_t zc = { 0 };
3003         char parent[ZFS_MAXNAMELEN];
3004         char *slash;
3005         zfs_handle_t *zhp;
3006         char errbuf[1024];
3007         uint64_t is_zoned;
3008
3009         (void) snprintf(errbuf, sizeof (errbuf),
3010             dgettext(TEXT_DOMAIN, "cannot create '%s'"), path);
3011
3012         /* get parent, and check to see if this is just a pool */
3013         if (parent_name(path, parent, sizeof (parent)) != 0) {
3014                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3015                     "missing dataset name"));
3016                 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3017         }
3018
3019         /* check to see if the pool exists */
3020         if ((slash = strchr(parent, '/')) == NULL)
3021                 slash = parent + strlen(parent);
3022         (void) strncpy(zc.zc_name, parent, slash - parent);
3023         zc.zc_name[slash - parent] = '\0';
3024         if (ioctl(hdl->libzfs_fd, ZFS_IOC_OBJSET_STATS, &zc) != 0 &&
3025             errno == ENOENT) {
3026                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3027                     "no such pool '%s'"), zc.zc_name);
3028                 return (zfs_error(hdl, EZFS_NOENT, errbuf));
3029         }
3030
3031         /* check to see if the parent dataset exists */
3032         while ((zhp = make_dataset_handle(hdl, parent)) == NULL) {
3033                 if (errno == ENOENT && accept_ancestor) {
3034                         /*
3035                          * Go deeper to find an ancestor, give up on top level.
3036                          */
3037                         if (parent_name(parent, parent, sizeof (parent)) != 0) {
3038                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3039                                     "no such pool '%s'"), zc.zc_name);
3040                                 return (zfs_error(hdl, EZFS_NOENT, errbuf));
3041                         }
3042                 } else if (errno == ENOENT) {
3043                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3044                             "parent does not exist"));
3045                         return (zfs_error(hdl, EZFS_NOENT, errbuf));
3046                 } else
3047                         return (zfs_standard_error(hdl, errno, errbuf));
3048         }
3049
3050         is_zoned = zfs_prop_get_int(zhp, ZFS_PROP_ZONED);
3051         if (zoned != NULL)
3052                 *zoned = is_zoned;
3053
3054         /* we are in a non-global zone, but parent is in the global zone */
3055         if (getzoneid() != GLOBAL_ZONEID && !is_zoned) {
3056                 (void) zfs_standard_error(hdl, EPERM, errbuf);
3057                 zfs_close(zhp);
3058                 return (-1);
3059         }
3060
3061         /* make sure parent is a filesystem */
3062         if (zfs_get_type(zhp) != ZFS_TYPE_FILESYSTEM) {
3063                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3064                     "parent is not a filesystem"));
3065                 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf);
3066                 zfs_close(zhp);
3067                 return (-1);
3068         }
3069
3070         zfs_close(zhp);
3071         if (prefixlen != NULL)
3072                 *prefixlen = strlen(parent);
3073         return (0);
3074 }
3075
3076 /*
3077  * Finds whether the dataset of the given type(s) exists.
3078  */
3079 boolean_t
3080 zfs_dataset_exists(libzfs_handle_t *hdl, const char *path, zfs_type_t types)
3081 {
3082         zfs_handle_t *zhp;
3083
3084         if (!zfs_validate_name(hdl, path, types, B_FALSE))
3085                 return (B_FALSE);
3086
3087         /*
3088          * Try to get stats for the dataset, which will tell us if it exists.
3089          */
3090         if ((zhp = make_dataset_handle(hdl, path)) != NULL) {
3091                 int ds_type = zhp->zfs_type;
3092
3093                 zfs_close(zhp);
3094                 if (types & ds_type)
3095                         return (B_TRUE);
3096         }
3097         return (B_FALSE);
3098 }
3099
3100 /*
3101  * Given a path to 'target', create all the ancestors between
3102  * the prefixlen portion of the path, and the target itself.
3103  * Fail if the initial prefixlen-ancestor does not already exist.
3104  */
3105 int
3106 create_parents(libzfs_handle_t *hdl, char *target, int prefixlen)
3107 {
3108         zfs_handle_t *h;
3109         char *cp;
3110         const char *opname;
3111
3112         /* make sure prefix exists */
3113         cp = target + prefixlen;
3114         if (*cp != '/') {
3115                 assert(strchr(cp, '/') == NULL);
3116                 h = zfs_open(hdl, target, ZFS_TYPE_FILESYSTEM);
3117         } else {
3118                 *cp = '\0';
3119                 h = zfs_open(hdl, target, ZFS_TYPE_FILESYSTEM);
3120                 *cp = '/';
3121         }
3122         if (h == NULL)
3123                 return (-1);
3124         zfs_close(h);
3125
3126         /*
3127          * Attempt to create, mount, and share any ancestor filesystems,
3128          * up to the prefixlen-long one.
3129          */
3130         for (cp = target + prefixlen + 1;
3131             cp = strchr(cp, '/'); *cp = '/', cp++) {
3132
3133                 *cp = '\0';
3134
3135                 h = make_dataset_handle(hdl, target);
3136                 if (h) {
3137                         /* it already exists, nothing to do here */
3138                         zfs_close(h);
3139                         continue;
3140                 }
3141
3142                 if (zfs_create(hdl, target, ZFS_TYPE_FILESYSTEM,
3143                     NULL) != 0) {
3144                         opname = dgettext(TEXT_DOMAIN, "create");
3145                         goto ancestorerr;
3146                 }
3147
3148                 h = zfs_open(hdl, target, ZFS_TYPE_FILESYSTEM);
3149                 if (h == NULL) {
3150                         opname = dgettext(TEXT_DOMAIN, "open");
3151                         goto ancestorerr;
3152                 }
3153
3154                 if (zfs_mount(h, NULL, 0) != 0) {
3155                         opname = dgettext(TEXT_DOMAIN, "mount");
3156                         goto ancestorerr;
3157                 }
3158
3159                 if (zfs_share(h) != 0) {
3160                         opname = dgettext(TEXT_DOMAIN, "share");
3161                         goto ancestorerr;
3162                 }
3163
3164                 zfs_close(h);
3165         }
3166
3167         return (0);
3168
3169 ancestorerr:
3170         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3171             "failed to %s ancestor '%s'"), opname, target);
3172         return (-1);
3173 }
3174
3175 /*
3176  * Creates non-existing ancestors of the given path.
3177  */
3178 int
3179 zfs_create_ancestors(libzfs_handle_t *hdl, const char *path)
3180 {
3181         int prefix;
3182         char *path_copy;
3183         int rc;
3184
3185         if (check_parents(hdl, path, NULL, B_TRUE, &prefix) != 0)
3186                 return (-1);
3187
3188         if ((path_copy = strdup(path)) != NULL) {
3189                 rc = create_parents(hdl, path_copy, prefix);
3190                 free(path_copy);
3191         }
3192         if (path_copy == NULL || rc != 0)
3193                 return (-1);
3194
3195         return (0);
3196 }
3197
3198 /*
3199  * Create a new filesystem or volume.
3200  */
3201 int
3202 zfs_create(libzfs_handle_t *hdl, const char *path, zfs_type_t type,
3203     nvlist_t *props)
3204 {
3205         int ret;
3206         uint64_t size = 0;
3207         uint64_t blocksize = zfs_prop_default_numeric(ZFS_PROP_VOLBLOCKSIZE);
3208         char errbuf[1024];
3209         uint64_t zoned;
3210         dmu_objset_type_t ost;
3211
3212         (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3213             "cannot create '%s'"), path);
3214
3215         /* validate the path, taking care to note the extended error message */
3216         if (!zfs_validate_name(hdl, path, type, B_TRUE))
3217                 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3218
3219         /* validate parents exist */
3220         if (check_parents(hdl, path, &zoned, B_FALSE, NULL) != 0)
3221                 return (-1);
3222
3223         /*
3224          * The failure modes when creating a dataset of a different type over
3225          * one that already exists is a little strange.  In particular, if you
3226          * try to create a dataset on top of an existing dataset, the ioctl()
3227          * will return ENOENT, not EEXIST.  To prevent this from happening, we
3228          * first try to see if the dataset exists.
3229          */
3230         if (zfs_dataset_exists(hdl, path, ZFS_TYPE_DATASET)) {
3231                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3232                     "dataset already exists"));
3233                 return (zfs_error(hdl, EZFS_EXISTS, errbuf));
3234         }
3235
3236         if (type == ZFS_TYPE_VOLUME)
3237                 ost = DMU_OST_ZVOL;
3238         else
3239                 ost = DMU_OST_ZFS;
3240
3241         if (props && (props = zfs_valid_proplist(hdl, type, props,
3242             zoned, NULL, errbuf)) == 0)
3243                 return (-1);
3244
3245         if (type == ZFS_TYPE_VOLUME) {
3246                 /*
3247                  * If we are creating a volume, the size and block size must
3248                  * satisfy a few restraints.  First, the blocksize must be a
3249                  * valid block size between SPA_{MIN,MAX}BLOCKSIZE.  Second, the
3250                  * volsize must be a multiple of the block size, and cannot be
3251                  * zero.
3252                  */
3253                 if (props == NULL || nvlist_lookup_uint64(props,
3254                     zfs_prop_to_name(ZFS_PROP_VOLSIZE), &size) != 0) {
3255                         nvlist_free(props);
3256                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3257                             "missing volume size"));
3258                         return (zfs_error(hdl, EZFS_BADPROP, errbuf));
3259                 }
3260
3261                 if ((ret = nvlist_lookup_uint64(props,
3262                     zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE),
3263                     &blocksize)) != 0) {
3264                         if (ret == ENOENT) {
3265                                 blocksize = zfs_prop_default_numeric(
3266                                     ZFS_PROP_VOLBLOCKSIZE);
3267                         } else {
3268                                 nvlist_free(props);
3269                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3270                                     "missing volume block size"));
3271                                 return (zfs_error(hdl, EZFS_BADPROP, errbuf));
3272                         }
3273                 }
3274
3275                 if (size == 0) {
3276                         nvlist_free(props);
3277                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3278                             "volume size cannot be zero"));
3279                         return (zfs_error(hdl, EZFS_BADPROP, errbuf));
3280                 }
3281
3282                 if (size % blocksize != 0) {
3283                         nvlist_free(props);
3284                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3285                             "volume size must be a multiple of volume block "
3286                             "size"));
3287                         return (zfs_error(hdl, EZFS_BADPROP, errbuf));
3288                 }
3289         }
3290
3291         /* create the dataset */
3292         ret = lzc_create(path, ost, props);
3293         nvlist_free(props);
3294
3295         /* check for failure */
3296         if (ret != 0) {
3297                 char parent[ZFS_MAXNAMELEN];
3298                 (void) parent_name(path, parent, sizeof (parent));
3299
3300                 switch (errno) {
3301                 case ENOENT:
3302                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3303                             "no such parent '%s'"), parent);
3304                         return (zfs_error(hdl, EZFS_NOENT, errbuf));
3305
3306                 case EINVAL:
3307                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3308                             "parent '%s' is not a filesystem"), parent);
3309                         return (zfs_error(hdl, EZFS_BADTYPE, errbuf));
3310
3311                 case EDOM:
3312                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3313                             "volume block size must be power of 2 from "
3314                             "512B to 128KB"));
3315
3316                         return (zfs_error(hdl, EZFS_BADPROP, errbuf));
3317
3318                 case ENOTSUP:
3319                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3320                             "pool must be upgraded to set this "
3321                             "property or value"));
3322                         return (zfs_error(hdl, EZFS_BADVERSION, errbuf));
3323 #ifdef _ILP32
3324                 case EOVERFLOW:
3325                         /*
3326                          * This platform can't address a volume this big.
3327                          */
3328                         if (type == ZFS_TYPE_VOLUME)
3329                                 return (zfs_error(hdl, EZFS_VOLTOOBIG,
3330                                     errbuf));
3331 #endif
3332                         /* FALLTHROUGH */
3333                 default:
3334                         return (zfs_standard_error(hdl, errno, errbuf));
3335                 }
3336         }
3337
3338         return (0);
3339 }
3340
3341 /*
3342  * Destroys the given dataset.  The caller must make sure that the filesystem
3343  * isn't mounted, and that there are no active dependents. If the file system
3344  * does not exist this function does nothing.
3345  */
3346 int
3347 zfs_destroy(zfs_handle_t *zhp, boolean_t defer)
3348 {
3349         zfs_cmd_t zc = { 0 };
3350
3351         if (zhp->zfs_type == ZFS_TYPE_BOOKMARK) {
3352                 nvlist_t *nv = fnvlist_alloc();
3353                 fnvlist_add_boolean(nv, zhp->zfs_name);
3354                 int error = lzc_destroy_bookmarks(nv, NULL);
3355                 fnvlist_free(nv);
3356                 if (error != 0) {
3357                         return (zfs_standard_error_fmt(zhp->zfs_hdl, errno,
3358                             dgettext(TEXT_DOMAIN, "cannot destroy '%s'"),
3359                             zhp->zfs_name));
3360                 }
3361                 return (0);
3362         }
3363
3364         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
3365
3366         if (ZFS_IS_VOLUME(zhp)) {
3367                 zc.zc_objset_type = DMU_OST_ZVOL;
3368         } else {
3369                 zc.zc_objset_type = DMU_OST_ZFS;
3370         }
3371
3372         zc.zc_defer_destroy = defer;
3373         if (zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_DESTROY, &zc) != 0 &&
3374             errno != ENOENT) {
3375                 return (zfs_standard_error_fmt(zhp->zfs_hdl, errno,
3376                     dgettext(TEXT_DOMAIN, "cannot destroy '%s'"),
3377                     zhp->zfs_name));
3378         }
3379
3380         remove_mountpoint(zhp);
3381
3382         return (0);
3383 }
3384
3385 struct destroydata {
3386         nvlist_t *nvl;
3387         const char *snapname;
3388 };
3389
3390 static int
3391 zfs_check_snap_cb(zfs_handle_t *zhp, void *arg)
3392 {
3393         struct destroydata *dd = arg;
3394         char name[ZFS_MAXNAMELEN];
3395         int rv = 0;
3396
3397         (void) snprintf(name, sizeof (name),
3398             "%s@%s", zhp->zfs_name, dd->snapname);
3399
3400         if (lzc_exists(name))
3401                 verify(nvlist_add_boolean(dd->nvl, name) == 0);
3402
3403         rv = zfs_iter_filesystems(zhp, zfs_check_snap_cb, dd);
3404         zfs_close(zhp);
3405         return (rv);
3406 }
3407
3408 /*
3409  * Destroys all snapshots with the given name in zhp & descendants.
3410  */
3411 int
3412 zfs_destroy_snaps(zfs_handle_t *zhp, char *snapname, boolean_t defer)
3413 {
3414         int ret;
3415         struct destroydata dd = { 0 };
3416
3417         dd.snapname = snapname;
3418         verify(nvlist_alloc(&dd.nvl, NV_UNIQUE_NAME, 0) == 0);
3419         (void) zfs_check_snap_cb(zfs_handle_dup(zhp), &dd);
3420
3421         if (nvlist_empty(dd.nvl)) {
3422                 ret = zfs_standard_error_fmt(zhp->zfs_hdl, ENOENT,
3423                     dgettext(TEXT_DOMAIN, "cannot destroy '%s@%s'"),
3424                     zhp->zfs_name, snapname);
3425         } else {
3426                 ret = zfs_destroy_snaps_nvl(zhp->zfs_hdl, dd.nvl, defer);
3427         }
3428         nvlist_free(dd.nvl);
3429         return (ret);
3430 }
3431
3432 /*
3433  * Destroys all the snapshots named in the nvlist.
3434  */
3435 int
3436 zfs_destroy_snaps_nvl(libzfs_handle_t *hdl, nvlist_t *snaps, boolean_t defer)
3437 {
3438         int ret;
3439         nvlist_t *errlist;
3440
3441         ret = lzc_destroy_snaps(snaps, defer, &errlist);
3442
3443         if (ret == 0)
3444                 return (0);
3445
3446         if (nvlist_empty(errlist)) {
3447                 char errbuf[1024];
3448                 (void) snprintf(errbuf, sizeof (errbuf),
3449                     dgettext(TEXT_DOMAIN, "cannot destroy snapshots"));
3450
3451                 ret = zfs_standard_error(hdl, ret, errbuf);
3452         }
3453         for (nvpair_t *pair = nvlist_next_nvpair(errlist, NULL);
3454             pair != NULL; pair = nvlist_next_nvpair(errlist, pair)) {
3455                 char errbuf[1024];
3456                 (void) snprintf(errbuf, sizeof (errbuf),
3457                     dgettext(TEXT_DOMAIN, "cannot destroy snapshot %s"),
3458                     nvpair_name(pair));
3459
3460                 switch (fnvpair_value_int32(pair)) {
3461                 case EEXIST:
3462                         zfs_error_aux(hdl,
3463                             dgettext(TEXT_DOMAIN, "snapshot is cloned"));
3464                         ret = zfs_error(hdl, EZFS_EXISTS, errbuf);
3465                         break;
3466                 default:
3467                         ret = zfs_standard_error(hdl, errno, errbuf);
3468                         break;
3469                 }
3470         }
3471
3472         return (ret);
3473 }
3474
3475 /*
3476  * Clones the given dataset.  The target must be of the same type as the source.
3477  */
3478 int
3479 zfs_clone(zfs_handle_t *zhp, const char *target, nvlist_t *props)
3480 {
3481         char parent[ZFS_MAXNAMELEN];
3482         int ret;
3483         char errbuf[1024];
3484         libzfs_handle_t *hdl = zhp->zfs_hdl;
3485         uint64_t zoned;
3486
3487         assert(zhp->zfs_type == ZFS_TYPE_SNAPSHOT);
3488
3489         (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3490             "cannot create '%s'"), target);
3491
3492         /* validate the target/clone name */
3493         if (!zfs_validate_name(hdl, target, ZFS_TYPE_FILESYSTEM, B_TRUE))
3494                 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3495
3496         /* validate parents exist */
3497         if (check_parents(hdl, target, &zoned, B_FALSE, NULL) != 0)
3498                 return (-1);
3499
3500         (void) parent_name(target, parent, sizeof (parent));
3501
3502         /* do the clone */
3503
3504         if (props) {
3505                 zfs_type_t type;
3506                 if (ZFS_IS_VOLUME(zhp)) {
3507                         type = ZFS_TYPE_VOLUME;
3508                 } else {
3509                         type = ZFS_TYPE_FILESYSTEM;
3510                 }
3511                 if ((props = zfs_valid_proplist(hdl, type, props, zoned,
3512                     zhp, errbuf)) == NULL)
3513                         return (-1);
3514         }
3515
3516         ret = lzc_clone(target, zhp->zfs_name, props);
3517         nvlist_free(props);
3518
3519         if (ret != 0) {
3520                 switch (errno) {
3521
3522                 case ENOENT:
3523                         /*
3524                          * The parent doesn't exist.  We should have caught this
3525                          * above, but there may a race condition that has since
3526                          * destroyed the parent.
3527                          *
3528                          * At this point, we don't know whether it's the source
3529                          * that doesn't exist anymore, or whether the target
3530                          * dataset doesn't exist.
3531                          */
3532                         zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN,
3533                             "no such parent '%s'"), parent);
3534                         return (zfs_error(zhp->zfs_hdl, EZFS_NOENT, errbuf));
3535
3536                 case EXDEV:
3537                         zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN,
3538                             "source and target pools differ"));
3539                         return (zfs_error(zhp->zfs_hdl, EZFS_CROSSTARGET,
3540                             errbuf));
3541
3542                 default:
3543                         return (zfs_standard_error(zhp->zfs_hdl, errno,
3544                             errbuf));
3545                 }
3546         }
3547
3548         return (ret);
3549 }
3550
3551 /*
3552  * Promotes the given clone fs to be the clone parent.
3553  */
3554 int
3555 zfs_promote(zfs_handle_t *zhp)
3556 {
3557         libzfs_handle_t *hdl = zhp->zfs_hdl;
3558         zfs_cmd_t zc = { 0 };
3559         char parent[MAXPATHLEN];
3560         int ret;
3561         char errbuf[1024];
3562
3563         (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3564             "cannot promote '%s'"), zhp->zfs_name);
3565
3566         if (zhp->zfs_type == ZFS_TYPE_SNAPSHOT) {
3567                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3568                     "snapshots can not be promoted"));
3569                 return (zfs_error(hdl, EZFS_BADTYPE, errbuf));
3570         }
3571
3572         (void) strlcpy(parent, zhp->zfs_dmustats.dds_origin, sizeof (parent));
3573         if (parent[0] == '\0') {
3574                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3575                     "not a cloned filesystem"));
3576                 return (zfs_error(hdl, EZFS_BADTYPE, errbuf));
3577         }
3578
3579         (void) strlcpy(zc.zc_value, zhp->zfs_dmustats.dds_origin,
3580             sizeof (zc.zc_value));
3581         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
3582         ret = zfs_ioctl(hdl, ZFS_IOC_PROMOTE, &zc);
3583
3584         if (ret != 0) {
3585                 int save_errno = errno;
3586
3587                 switch (save_errno) {
3588                 case EEXIST:
3589                         /* There is a conflicting snapshot name. */
3590                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3591                             "conflicting snapshot '%s' from parent '%s'"),
3592                             zc.zc_string, parent);
3593                         return (zfs_error(hdl, EZFS_EXISTS, errbuf));
3594
3595                 default:
3596                         return (zfs_standard_error(hdl, save_errno, errbuf));
3597                 }
3598         }
3599         return (ret);
3600 }
3601
3602 typedef struct snapdata {
3603         nvlist_t *sd_nvl;
3604         const char *sd_snapname;
3605 } snapdata_t;
3606
3607 static int
3608 zfs_snapshot_cb(zfs_handle_t *zhp, void *arg)
3609 {
3610         snapdata_t *sd = arg;
3611         char name[ZFS_MAXNAMELEN];
3612         int rv = 0;
3613
3614         if (zfs_prop_get_int(zhp, ZFS_PROP_INCONSISTENT) == 0) {
3615                 (void) snprintf(name, sizeof (name),
3616                     "%s@%s", zfs_get_name(zhp), sd->sd_snapname);
3617
3618                 fnvlist_add_boolean(sd->sd_nvl, name);
3619
3620                 rv = zfs_iter_filesystems(zhp, zfs_snapshot_cb, sd);
3621         }
3622         zfs_close(zhp);
3623
3624         return (rv);
3625 }
3626
3627 /*
3628  * Creates snapshots.  The keys in the snaps nvlist are the snapshots to be
3629  * created.
3630  */
3631 int
3632 zfs_snapshot_nvl(libzfs_handle_t *hdl, nvlist_t *snaps, nvlist_t *props)
3633 {
3634         int ret;
3635         char errbuf[1024];
3636         nvpair_t *elem;
3637         nvlist_t *errors;
3638
3639         (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3640             "cannot create snapshots "));
3641
3642         elem = NULL;
3643         while ((elem = nvlist_next_nvpair(snaps, elem)) != NULL) {
3644                 const char *snapname = nvpair_name(elem);
3645
3646                 /* validate the target name */
3647                 if (!zfs_validate_name(hdl, snapname, ZFS_TYPE_SNAPSHOT,
3648                     B_TRUE)) {
3649                         (void) snprintf(errbuf, sizeof (errbuf),
3650                             dgettext(TEXT_DOMAIN,
3651                             "cannot create snapshot '%s'"), snapname);
3652                         return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3653                 }
3654         }
3655
3656         if (props != NULL &&
3657             (props = zfs_valid_proplist(hdl, ZFS_TYPE_SNAPSHOT,
3658             props, B_FALSE, NULL, errbuf)) == NULL) {
3659                 return (-1);
3660         }
3661
3662         ret = lzc_snapshot(snaps, props, &errors);
3663
3664         if (ret != 0) {
3665                 boolean_t printed = B_FALSE;
3666                 for (elem = nvlist_next_nvpair(errors, NULL);
3667                     elem != NULL;
3668                     elem = nvlist_next_nvpair(errors, elem)) {
3669                         (void) snprintf(errbuf, sizeof (errbuf),
3670                             dgettext(TEXT_DOMAIN,
3671                             "cannot create snapshot '%s'"), nvpair_name(elem));
3672                         (void) zfs_standard_error(hdl,
3673                             fnvpair_value_int32(elem), errbuf);
3674                         printed = B_TRUE;
3675                 }
3676                 if (!printed) {
3677                         switch (ret) {
3678                         case EXDEV:
3679                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3680                                     "multiple snapshots of same "
3681                                     "fs not allowed"));
3682                                 (void) zfs_error(hdl, EZFS_EXISTS, errbuf);
3683
3684                                 break;
3685                         default:
3686                                 (void) zfs_standard_error(hdl, ret, errbuf);
3687                         }
3688                 }
3689         }
3690
3691         nvlist_free(props);
3692         nvlist_free(errors);
3693         return (ret);
3694 }
3695
3696 int
3697 zfs_snapshot(libzfs_handle_t *hdl, const char *path, boolean_t recursive,
3698     nvlist_t *props)
3699 {
3700         int ret;
3701         snapdata_t sd = { 0 };
3702         char fsname[ZFS_MAXNAMELEN];
3703         char *cp;
3704         zfs_handle_t *zhp;
3705         char errbuf[1024];
3706
3707         (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3708             "cannot snapshot %s"), path);
3709
3710         if (!zfs_validate_name(hdl, path, ZFS_TYPE_SNAPSHOT, B_TRUE))
3711                 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3712
3713         (void) strlcpy(fsname, path, sizeof (fsname));
3714         cp = strchr(fsname, '@');
3715         *cp = '\0';
3716         sd.sd_snapname = cp + 1;
3717
3718         if ((zhp = zfs_open(hdl, fsname, ZFS_TYPE_FILESYSTEM |
3719             ZFS_TYPE_VOLUME)) == NULL) {
3720                 return (-1);
3721         }
3722
3723         verify(nvlist_alloc(&sd.sd_nvl, NV_UNIQUE_NAME, 0) == 0);
3724         if (recursive) {
3725                 (void) zfs_snapshot_cb(zfs_handle_dup(zhp), &sd);
3726         } else {
3727                 fnvlist_add_boolean(sd.sd_nvl, path);
3728         }
3729
3730         ret = zfs_snapshot_nvl(hdl, sd.sd_nvl, props);
3731         nvlist_free(sd.sd_nvl);
3732         zfs_close(zhp);
3733         return (ret);
3734 }
3735
3736 /*
3737  * Destroy any more recent snapshots.  We invoke this callback on any dependents
3738  * of the snapshot first.  If the 'cb_dependent' member is non-zero, then this
3739  * is a dependent and we should just destroy it without checking the transaction
3740  * group.
3741  */
3742 typedef struct rollback_data {
3743         const char      *cb_target;             /* the snapshot */
3744         uint64_t        cb_create;              /* creation time reference */
3745         boolean_t       cb_error;
3746         boolean_t       cb_force;
3747 } rollback_data_t;
3748
3749 static int
3750 rollback_destroy_dependent(zfs_handle_t *zhp, void *data)
3751 {
3752         rollback_data_t *cbp = data;
3753         prop_changelist_t *clp;
3754
3755         /* We must destroy this clone; first unmount it */
3756         clp = changelist_gather(zhp, ZFS_PROP_NAME, 0,
3757             cbp->cb_force ? MS_FORCE: 0);
3758         if (clp == NULL || changelist_prefix(clp) != 0) {
3759                 cbp->cb_error = B_TRUE;
3760                 zfs_close(zhp);
3761                 return (0);
3762         }
3763         if (zfs_destroy(zhp, B_FALSE) != 0)
3764                 cbp->cb_error = B_TRUE;
3765         else
3766                 changelist_remove(clp, zhp->zfs_name);
3767         (void) changelist_postfix(clp);
3768         changelist_free(clp);
3769
3770         zfs_close(zhp);
3771         return (0);
3772 }
3773
3774 static int
3775 rollback_destroy(zfs_handle_t *zhp, void *data)
3776 {
3777         rollback_data_t *cbp = data;
3778
3779         if (zfs_prop_get_int(zhp, ZFS_PROP_CREATETXG) > cbp->cb_create) {
3780                 cbp->cb_error |= zfs_iter_dependents(zhp, B_FALSE,
3781                     rollback_destroy_dependent, cbp);
3782
3783                 cbp->cb_error |= zfs_destroy(zhp, B_FALSE);
3784         }
3785
3786         zfs_close(zhp);
3787         return (0);
3788 }
3789
3790 /*
3791  * Given a dataset, rollback to a specific snapshot, discarding any
3792  * data changes since then and making it the active dataset.
3793  *
3794  * Any snapshots and bookmarks more recent than the target are
3795  * destroyed, along with their dependents (i.e. clones).
3796  */
3797 int
3798 zfs_rollback(zfs_handle_t *zhp, zfs_handle_t *snap, boolean_t force)
3799 {
3800         rollback_data_t cb = { 0 };
3801         int err;
3802         boolean_t restore_resv = 0;
3803         uint64_t old_volsize, new_volsize;
3804         zfs_prop_t resv_prop;
3805
3806         assert(zhp->zfs_type == ZFS_TYPE_FILESYSTEM ||
3807             zhp->zfs_type == ZFS_TYPE_VOLUME);
3808
3809         /*
3810          * Destroy all recent snapshots and their dependents.
3811          */
3812         cb.cb_force = force;
3813         cb.cb_target = snap->zfs_name;
3814         cb.cb_create = zfs_prop_get_int(snap, ZFS_PROP_CREATETXG);
3815         (void) zfs_iter_snapshots(zhp, B_FALSE, rollback_destroy, &cb);
3816         (void) zfs_iter_bookmarks(zhp, rollback_destroy, &cb);
3817
3818         if (cb.cb_error)
3819                 return (-1);
3820
3821         /*
3822          * Now that we have verified that the snapshot is the latest,
3823          * rollback to the given snapshot.
3824          */
3825
3826         if (zhp->zfs_type == ZFS_TYPE_VOLUME) {
3827                 if (zfs_which_resv_prop(zhp, &resv_prop) < 0)
3828                         return (-1);
3829                 old_volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE);
3830                 restore_resv =
3831                     (old_volsize == zfs_prop_get_int(zhp, resv_prop));
3832         }
3833
3834         /*
3835          * We rely on zfs_iter_children() to verify that there are no
3836          * newer snapshots for the given dataset.  Therefore, we can
3837          * simply pass the name on to the ioctl() call.  There is still
3838          * an unlikely race condition where the user has taken a
3839          * snapshot since we verified that this was the most recent.
3840          */
3841         err = lzc_rollback(zhp->zfs_name, NULL, 0);
3842         if (err != 0) {
3843                 (void) zfs_standard_error_fmt(zhp->zfs_hdl, errno,
3844                     dgettext(TEXT_DOMAIN, "cannot rollback '%s'"),
3845                     zhp->zfs_name);
3846                 return (err);
3847         }
3848
3849         /*
3850          * For volumes, if the pre-rollback volsize matched the pre-
3851          * rollback reservation and the volsize has changed then set
3852          * the reservation property to the post-rollback volsize.
3853          * Make a new handle since the rollback closed the dataset.
3854          */
3855         if ((zhp->zfs_type == ZFS_TYPE_VOLUME) &&
3856             (zhp = make_dataset_handle(zhp->zfs_hdl, zhp->zfs_name))) {
3857                 if (restore_resv) {
3858                         new_volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE);
3859                         if (old_volsize != new_volsize)
3860                                 err = zfs_prop_set_int(zhp, resv_prop,
3861                                     new_volsize);
3862                 }
3863                 zfs_close(zhp);
3864         }
3865         return (err);
3866 }
3867
3868 /*
3869  * Renames the given dataset.
3870  */
3871 int
3872 zfs_rename(zfs_handle_t *zhp, const char *source, const char *target,
3873     renameflags_t flags)
3874 {
3875         int ret;
3876         zfs_cmd_t zc = { 0 };
3877         char *delim;
3878         prop_changelist_t *cl = NULL;
3879         zfs_handle_t *zhrp = NULL;
3880         char *parentname = NULL;
3881         char parent[ZFS_MAXNAMELEN];
3882         char property[ZFS_MAXPROPLEN];
3883         libzfs_handle_t *hdl = zhp->zfs_hdl;
3884         char errbuf[1024];
3885
3886         /* if we have the same exact name, just return success */
3887         if (strcmp(zhp->zfs_name, target) == 0)
3888                 return (0);
3889
3890         (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3891             "cannot rename to '%s'"), target);
3892
3893         if (source != NULL) {
3894                 /*
3895                  * This is recursive snapshots rename, put snapshot name
3896                  * (that might not exist) into zfs_name.
3897                  */
3898                 assert(flags.recurse);
3899
3900                 (void) strlcat(zhp->zfs_name, "@", sizeof(zhp->zfs_name));
3901                 (void) strlcat(zhp->zfs_name, source, sizeof(zhp->zfs_name));
3902                 zhp->zfs_type = ZFS_TYPE_SNAPSHOT;
3903         }
3904
3905         /*
3906          * Make sure the target name is valid
3907          */
3908         if (zhp->zfs_type == ZFS_TYPE_SNAPSHOT) {
3909                 if ((strchr(target, '@') == NULL) ||
3910                     *target == '@') {
3911                         /*
3912                          * Snapshot target name is abbreviated,
3913                          * reconstruct full dataset name
3914                          */
3915                         (void) strlcpy(parent, zhp->zfs_name,
3916                             sizeof (parent));
3917                         delim = strchr(parent, '@');
3918                         if (strchr(target, '@') == NULL)
3919                                 *(++delim) = '\0';
3920                         else
3921                                 *delim = '\0';
3922                         (void) strlcat(parent, target, sizeof (parent));
3923                         target = parent;
3924                 } else {
3925                         /*
3926                          * Make sure we're renaming within the same dataset.
3927                          */
3928                         delim = strchr(target, '@');
3929                         if (strncmp(zhp->zfs_name, target, delim - target)
3930                             != 0 || zhp->zfs_name[delim - target] != '@') {
3931                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3932                                     "snapshots must be part of same "
3933                                     "dataset"));
3934                                 return (zfs_error(hdl, EZFS_CROSSTARGET,
3935                                     errbuf));
3936                         }
3937                 }
3938                 if (!zfs_validate_name(hdl, target, zhp->zfs_type, B_TRUE))
3939                         return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3940         } else {
3941                 if (flags.recurse) {
3942                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3943                             "recursive rename must be a snapshot"));
3944                         return (zfs_error(hdl, EZFS_BADTYPE, errbuf));
3945                 }
3946
3947                 if (!zfs_validate_name(hdl, target, zhp->zfs_type, B_TRUE))
3948                         return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3949
3950                 /* validate parents */
3951                 if (check_parents(hdl, target, NULL, B_FALSE, NULL) != 0)
3952                         return (-1);
3953
3954                 /* make sure we're in the same pool */
3955                 verify((delim = strchr(target, '/')) != NULL);
3956                 if (strncmp(zhp->zfs_name, target, delim - target) != 0 ||
3957                     zhp->zfs_name[delim - target] != '/') {
3958                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3959                             "datasets must be within same pool"));
3960                         return (zfs_error(hdl, EZFS_CROSSTARGET, errbuf));
3961                 }
3962
3963                 /* new name cannot be a child of the current dataset name */
3964                 if (is_descendant(zhp->zfs_name, target)) {
3965                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3966                             "New dataset name cannot be a descendant of "
3967                             "current dataset name"));
3968                         return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3969                 }
3970         }
3971
3972         (void) snprintf(errbuf, sizeof (errbuf),
3973             dgettext(TEXT_DOMAIN, "cannot rename '%s'"), zhp->zfs_name);
3974
3975         if (getzoneid() == GLOBAL_ZONEID &&
3976             zfs_prop_get_int(zhp, ZFS_PROP_ZONED)) {
3977                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3978                     "dataset is used in a non-global zone"));
3979                 return (zfs_error(hdl, EZFS_ZONED, errbuf));
3980         }
3981
3982         /*
3983          * Avoid unmounting file systems with mountpoint property set to
3984          * 'legacy' or 'none' even if -u option is not given.
3985          */
3986         if (zhp->zfs_type == ZFS_TYPE_FILESYSTEM &&
3987             !flags.recurse && !flags.nounmount &&
3988             zfs_prop_get(zhp, ZFS_PROP_MOUNTPOINT, property,
3989             sizeof (property), NULL, NULL, 0, B_FALSE) == 0 &&
3990             (strcmp(property, "legacy") == 0 ||
3991              strcmp(property, "none") == 0)) {
3992                 flags.nounmount = B_TRUE;
3993         }
3994         if (flags.recurse) {
3995
3996                 parentname = zfs_strdup(zhp->zfs_hdl, zhp->zfs_name);
3997                 if (parentname == NULL) {
3998                         ret = -1;
3999                         goto error;
4000                 }
4001                 delim = strchr(parentname, '@');
4002                 *delim = '\0';
4003                 zhrp = zfs_open(zhp->zfs_hdl, parentname, ZFS_TYPE_DATASET);
4004                 if (zhrp == NULL) {
4005                         ret = -1;
4006                         goto error;
4007                 }
4008         } else if (zhp->zfs_type != ZFS_TYPE_SNAPSHOT) {
4009                 if ((cl = changelist_gather(zhp, ZFS_PROP_NAME,
4010                     flags.nounmount ? CL_GATHER_DONT_UNMOUNT : 0,
4011                     flags.forceunmount ? MS_FORCE : 0)) == NULL) {
4012                         return (-1);
4013                 }
4014
4015                 if (changelist_haszonedchild(cl)) {
4016                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4017                             "child dataset with inherited mountpoint is used "
4018                             "in a non-global zone"));
4019                         (void) zfs_error(hdl, EZFS_ZONED, errbuf);
4020                         goto error;
4021                 }
4022
4023                 if ((ret = changelist_prefix(cl)) != 0)
4024                         goto error;
4025         }
4026
4027         if (ZFS_IS_VOLUME(zhp))
4028                 zc.zc_objset_type = DMU_OST_ZVOL;
4029         else
4030                 zc.zc_objset_type = DMU_OST_ZFS;
4031
4032         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
4033         (void) strlcpy(zc.zc_value, target, sizeof (zc.zc_value));
4034
4035         zc.zc_cookie = flags.recurse ? 1 : 0;
4036         if (flags.nounmount)
4037                 zc.zc_cookie |= 2;
4038
4039         if ((ret = zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_RENAME, &zc)) != 0) {
4040                 /*
4041                  * if it was recursive, the one that actually failed will
4042                  * be in zc.zc_name
4043                  */
4044                 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
4045                     "cannot rename '%s'"), zc.zc_name);
4046
4047                 if (flags.recurse && errno == EEXIST) {
4048                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4049                             "a child dataset already has a snapshot "
4050                             "with the new name"));
4051                         (void) zfs_error(hdl, EZFS_EXISTS, errbuf);
4052                 } else {
4053                         (void) zfs_standard_error(zhp->zfs_hdl, errno, errbuf);
4054                 }
4055
4056                 /*
4057                  * On failure, we still want to remount any filesystems that
4058                  * were previously mounted, so we don't alter the system state.
4059                  */
4060                 if (cl != NULL)
4061                         (void) changelist_postfix(cl);
4062         } else {
4063                 if (cl != NULL) {
4064                         changelist_rename(cl, zfs_get_name(zhp), target);
4065                         ret = changelist_postfix(cl);
4066                 }
4067         }
4068
4069 error:
4070         if (parentname != NULL) {
4071                 free(parentname);
4072         }
4073         if (zhrp != NULL) {
4074                 zfs_close(zhrp);
4075         }
4076         if (cl != NULL) {
4077                 changelist_free(cl);
4078         }
4079         return (ret);
4080 }
4081
4082 nvlist_t *
4083 zfs_get_user_props(zfs_handle_t *zhp)
4084 {
4085         return (zhp->zfs_user_props);
4086 }
4087
4088 nvlist_t *
4089 zfs_get_recvd_props(zfs_handle_t *zhp)
4090 {
4091         if (zhp->zfs_recvd_props == NULL)
4092                 if (get_recvd_props_ioctl(zhp) != 0)
4093                         return (NULL);
4094         return (zhp->zfs_recvd_props);
4095 }
4096
4097 /*
4098  * This function is used by 'zfs list' to determine the exact set of columns to
4099  * display, and their maximum widths.  This does two main things:
4100  *
4101  *      - If this is a list of all properties, then expand the list to include
4102  *        all native properties, and set a flag so that for each dataset we look
4103  *        for new unique user properties and add them to the list.
4104  *
4105  *      - For non fixed-width properties, keep track of the maximum width seen
4106  *        so that we can size the column appropriately. If the user has
4107  *        requested received property values, we also need to compute the width
4108  *        of the RECEIVED column.
4109  */
4110 int
4111 zfs_expand_proplist(zfs_handle_t *zhp, zprop_list_t **plp, boolean_t received,
4112     boolean_t literal)
4113 {
4114         libzfs_handle_t *hdl = zhp->zfs_hdl;
4115         zprop_list_t *entry;
4116         zprop_list_t **last, **start;
4117         nvlist_t *userprops, *propval;
4118         nvpair_t *elem;
4119         char *strval;
4120         char buf[ZFS_MAXPROPLEN];
4121
4122         if (zprop_expand_list(hdl, plp, ZFS_TYPE_DATASET) != 0)
4123                 return (-1);
4124
4125         userprops = zfs_get_user_props(zhp);
4126
4127         entry = *plp;
4128         if (entry->pl_all && nvlist_next_nvpair(userprops, NULL) != NULL) {
4129                 /*
4130                  * Go through and add any user properties as necessary.  We
4131                  * start by incrementing our list pointer to the first
4132                  * non-native property.
4133                  */
4134                 start = plp;
4135                 while (*start != NULL) {
4136                         if ((*start)->pl_prop == ZPROP_INVAL)
4137                                 break;
4138                         start = &(*start)->pl_next;
4139                 }
4140
4141                 elem = NULL;
4142                 while ((elem = nvlist_next_nvpair(userprops, elem)) != NULL) {
4143                         /*
4144                          * See if we've already found this property in our list.
4145                          */
4146                         for (last = start; *last != NULL;
4147                             last = &(*last)->pl_next) {
4148                                 if (strcmp((*last)->pl_user_prop,
4149                                     nvpair_name(elem)) == 0)
4150                                         break;
4151                         }
4152
4153                         if (*last == NULL) {
4154                                 if ((entry = zfs_alloc(hdl,
4155                                     sizeof (zprop_list_t))) == NULL ||
4156                                     ((entry->pl_user_prop = zfs_strdup(hdl,
4157                                     nvpair_name(elem)))) == NULL) {
4158                                         free(entry);
4159                                         return (-1);
4160                                 }
4161
4162                                 entry->pl_prop = ZPROP_INVAL;
4163                                 entry->pl_width = strlen(nvpair_name(elem));
4164                                 entry->pl_all = B_TRUE;
4165                                 *last = entry;
4166                         }
4167                 }
4168         }
4169
4170         /*
4171          * Now go through and check the width of any non-fixed columns
4172          */
4173         for (entry = *plp; entry != NULL; entry = entry->pl_next) {
4174                 if (entry->pl_fixed && !literal)
4175                         continue;
4176
4177                 if (entry->pl_prop != ZPROP_INVAL) {
4178                         if (zfs_prop_get(zhp, entry->pl_prop,
4179                             buf, sizeof (buf), NULL, NULL, 0, literal) == 0) {
4180                                 if (strlen(buf) > entry->pl_width)
4181                                         entry->pl_width = strlen(buf);
4182                         }
4183                         if (received && zfs_prop_get_recvd(zhp,
4184                             zfs_prop_to_name(entry->pl_prop),
4185                             buf, sizeof (buf), literal) == 0)
4186                                 if (strlen(buf) > entry->pl_recvd_width)
4187                                         entry->pl_recvd_width = strlen(buf);
4188                 } else {
4189                         if (nvlist_lookup_nvlist(userprops, entry->pl_user_prop,
4190                             &propval) == 0) {
4191                                 verify(nvlist_lookup_string(propval,
4192                                     ZPROP_VALUE, &strval) == 0);
4193                                 if (strlen(strval) > entry->pl_width)
4194                                         entry->pl_width = strlen(strval);
4195                         }
4196                         if (received && zfs_prop_get_recvd(zhp,
4197                             entry->pl_user_prop,
4198                             buf, sizeof (buf), literal) == 0)
4199                                 if (strlen(buf) > entry->pl_recvd_width)
4200                                         entry->pl_recvd_width = strlen(buf);
4201                 }
4202         }
4203
4204         return (0);
4205 }
4206
4207 int
4208 zfs_deleg_share_nfs(libzfs_handle_t *hdl, char *dataset, char *path,
4209     char *resource, void *export, void *sharetab,
4210     int sharemax, zfs_share_op_t operation)
4211 {
4212         zfs_cmd_t zc = { 0 };
4213         int error;
4214
4215         (void) strlcpy(zc.zc_name, dataset, sizeof (zc.zc_name));
4216         (void) strlcpy(zc.zc_value, path, sizeof (zc.zc_value));
4217         if (resource)
4218                 (void) strlcpy(zc.zc_string, resource, sizeof (zc.zc_string));
4219         zc.zc_share.z_sharedata = (uint64_t)(uintptr_t)sharetab;
4220         zc.zc_share.z_exportdata = (uint64_t)(uintptr_t)export;
4221         zc.zc_share.z_sharetype = operation;
4222         zc.zc_share.z_sharemax = sharemax;
4223         error = ioctl(hdl->libzfs_fd, ZFS_IOC_SHARE, &zc);
4224         return (error);
4225 }
4226
4227 void
4228 zfs_prune_proplist(zfs_handle_t *zhp, uint8_t *props)
4229 {
4230         nvpair_t *curr;
4231
4232         /*
4233          * Keep a reference to the props-table against which we prune the
4234          * properties.
4235          */
4236         zhp->zfs_props_table = props;
4237
4238         curr = nvlist_next_nvpair(zhp->zfs_props, NULL);
4239
4240         while (curr) {
4241                 zfs_prop_t zfs_prop = zfs_name_to_prop(nvpair_name(curr));
4242                 nvpair_t *next = nvlist_next_nvpair(zhp->zfs_props, curr);
4243
4244                 /*
4245                  * User properties will result in ZPROP_INVAL, and since we
4246                  * only know how to prune standard ZFS properties, we always
4247                  * leave these in the list.  This can also happen if we
4248                  * encounter an unknown DSL property (when running older
4249                  * software, for example).
4250                  */
4251                 if (zfs_prop != ZPROP_INVAL && props[zfs_prop] == B_FALSE)
4252                         (void) nvlist_remove(zhp->zfs_props,
4253                             nvpair_name(curr), nvpair_type(curr));
4254                 curr = next;
4255         }
4256 }
4257
4258 #ifdef sun
4259 static int
4260 zfs_smb_acl_mgmt(libzfs_handle_t *hdl, char *dataset, char *path,
4261     zfs_smb_acl_op_t cmd, char *resource1, char *resource2)
4262 {
4263         zfs_cmd_t zc = { 0 };
4264         nvlist_t *nvlist = NULL;
4265         int error;
4266
4267         (void) strlcpy(zc.zc_name, dataset, sizeof (zc.zc_name));
4268         (void) strlcpy(zc.zc_value, path, sizeof (zc.zc_value));
4269         zc.zc_cookie = (uint64_t)cmd;
4270
4271         if (cmd == ZFS_SMB_ACL_RENAME) {
4272                 if (nvlist_alloc(&nvlist, NV_UNIQUE_NAME, 0) != 0) {
4273                         (void) no_memory(hdl);
4274                         return (0);
4275                 }
4276         }
4277
4278         switch (cmd) {
4279         case ZFS_SMB_ACL_ADD:
4280         case ZFS_SMB_ACL_REMOVE:
4281                 (void) strlcpy(zc.zc_string, resource1, sizeof (zc.zc_string));
4282                 break;
4283         case ZFS_SMB_ACL_RENAME:
4284                 if (nvlist_add_string(nvlist, ZFS_SMB_ACL_SRC,
4285                     resource1) != 0) {
4286                                 (void) no_memory(hdl);
4287                                 return (-1);
4288                 }
4289                 if (nvlist_add_string(nvlist, ZFS_SMB_ACL_TARGET,
4290                     resource2) != 0) {
4291                                 (void) no_memory(hdl);
4292                                 return (-1);
4293                 }
4294                 if (zcmd_write_src_nvlist(hdl, &zc, nvlist) != 0) {
4295                         nvlist_free(nvlist);
4296                         return (-1);
4297                 }
4298                 break;
4299         case ZFS_SMB_ACL_PURGE:
4300                 break;
4301         default:
4302                 return (-1);
4303         }
4304         error = ioctl(hdl->libzfs_fd, ZFS_IOC_SMB_ACL, &zc);
4305         if (nvlist)
4306                 nvlist_free(nvlist);
4307         return (error);
4308 }
4309
4310 int
4311 zfs_smb_acl_add(libzfs_handle_t *hdl, char *dataset,
4312     char *path, char *resource)
4313 {
4314         return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_ADD,
4315             resource, NULL));
4316 }
4317
4318 int
4319 zfs_smb_acl_remove(libzfs_handle_t *hdl, char *dataset,
4320     char *path, char *resource)
4321 {
4322         return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_REMOVE,
4323             resource, NULL));
4324 }
4325
4326 int
4327 zfs_smb_acl_purge(libzfs_handle_t *hdl, char *dataset, char *path)
4328 {
4329         return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_PURGE,
4330             NULL, NULL));
4331 }
4332
4333 int
4334 zfs_smb_acl_rename(libzfs_handle_t *hdl, char *dataset, char *path,
4335     char *oldname, char *newname)
4336 {
4337         return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_RENAME,
4338             oldname, newname));
4339 }
4340 #endif  /* sun */
4341
4342 int
4343 zfs_userspace(zfs_handle_t *zhp, zfs_userquota_prop_t type,
4344     zfs_userspace_cb_t func, void *arg)
4345 {
4346         zfs_cmd_t zc = { 0 };
4347         zfs_useracct_t buf[100];
4348         libzfs_handle_t *hdl = zhp->zfs_hdl;
4349         int ret;
4350
4351         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
4352
4353         zc.zc_objset_type = type;
4354         zc.zc_nvlist_dst = (uintptr_t)buf;
4355
4356         for (;;) {
4357                 zfs_useracct_t *zua = buf;
4358
4359                 zc.zc_nvlist_dst_size = sizeof (buf);
4360                 if (zfs_ioctl(hdl, ZFS_IOC_USERSPACE_MANY, &zc) != 0) {
4361                         char errbuf[1024];
4362
4363                         (void) snprintf(errbuf, sizeof (errbuf),
4364                             dgettext(TEXT_DOMAIN,
4365                             "cannot get used/quota for %s"), zc.zc_name);
4366                         return (zfs_standard_error_fmt(hdl, errno, errbuf));
4367                 }
4368                 if (zc.zc_nvlist_dst_size == 0)
4369                         break;
4370
4371                 while (zc.zc_nvlist_dst_size > 0) {
4372                         if ((ret = func(arg, zua->zu_domain, zua->zu_rid,
4373                             zua->zu_space)) != 0)
4374                                 return (ret);
4375                         zua++;
4376                         zc.zc_nvlist_dst_size -= sizeof (zfs_useracct_t);
4377                 }
4378         }
4379
4380         return (0);
4381 }
4382
4383 struct holdarg {
4384         nvlist_t *nvl;
4385         const char *snapname;
4386         const char *tag;
4387         boolean_t recursive;
4388         int error;
4389 };
4390
4391 static int
4392 zfs_hold_one(zfs_handle_t *zhp, void *arg)
4393 {
4394         struct holdarg *ha = arg;
4395         char name[ZFS_MAXNAMELEN];
4396         int rv = 0;
4397
4398         (void) snprintf(name, sizeof (name),
4399             "%s@%s", zhp->zfs_name, ha->snapname);
4400
4401         if (lzc_exists(name))
4402                 fnvlist_add_string(ha->nvl, name, ha->tag);
4403
4404         if (ha->recursive)
4405                 rv = zfs_iter_filesystems(zhp, zfs_hold_one, ha);
4406         zfs_close(zhp);
4407         return (rv);
4408 }
4409
4410 int
4411 zfs_hold(zfs_handle_t *zhp, const char *snapname, const char *tag,
4412     boolean_t recursive, int cleanup_fd)
4413 {
4414         int ret;
4415         struct holdarg ha;
4416
4417         ha.nvl = fnvlist_alloc();
4418         ha.snapname = snapname;
4419         ha.tag = tag;
4420         ha.recursive = recursive;
4421         (void) zfs_hold_one(zfs_handle_dup(zhp), &ha);
4422
4423         if (nvlist_empty(ha.nvl)) {
4424                 char errbuf[1024];
4425
4426                 fnvlist_free(ha.nvl);
4427                 ret = ENOENT;
4428                 (void) snprintf(errbuf, sizeof (errbuf),
4429                     dgettext(TEXT_DOMAIN,
4430                     "cannot hold snapshot '%s@%s'"),
4431                     zhp->zfs_name, snapname);
4432                 (void) zfs_standard_error(zhp->zfs_hdl, ret, errbuf);
4433                 return (ret);
4434         }
4435
4436         ret = zfs_hold_nvl(zhp, cleanup_fd, ha.nvl);
4437         fnvlist_free(ha.nvl);
4438
4439         return (ret);
4440 }
4441
4442 int
4443 zfs_hold_nvl(zfs_handle_t *zhp, int cleanup_fd, nvlist_t *holds)
4444 {
4445         int ret;
4446         nvlist_t *errors;
4447         libzfs_handle_t *hdl = zhp->zfs_hdl;
4448         char errbuf[1024];
4449         nvpair_t *elem;
4450
4451         errors = NULL;
4452         ret = lzc_hold(holds, cleanup_fd, &errors);
4453
4454         if (ret == 0) {
4455                 /* There may be errors even in the success case. */
4456                 fnvlist_free(errors);
4457                 return (0);
4458         }
4459
4460         if (nvlist_empty(errors)) {
4461                 /* no hold-specific errors */
4462                 (void) snprintf(errbuf, sizeof (errbuf),
4463                     dgettext(TEXT_DOMAIN, "cannot hold"));
4464                 switch (ret) {
4465                 case ENOTSUP:
4466                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4467                             "pool must be upgraded"));
4468                         (void) zfs_error(hdl, EZFS_BADVERSION, errbuf);
4469                         break;
4470                 case EINVAL:
4471                         (void) zfs_error(hdl, EZFS_BADTYPE, errbuf);
4472                         break;
4473                 default:
4474                         (void) zfs_standard_error(hdl, ret, errbuf);
4475                 }
4476         }
4477
4478         for (elem = nvlist_next_nvpair(errors, NULL);
4479             elem != NULL;
4480             elem = nvlist_next_nvpair(errors, elem)) {
4481                 (void) snprintf(errbuf, sizeof (errbuf),
4482                     dgettext(TEXT_DOMAIN,
4483                     "cannot hold snapshot '%s'"), nvpair_name(elem));
4484                 switch (fnvpair_value_int32(elem)) {
4485                 case E2BIG:
4486                         /*
4487                          * Temporary tags wind up having the ds object id
4488                          * prepended. So even if we passed the length check
4489                          * above, it's still possible for the tag to wind
4490                          * up being slightly too long.
4491                          */
4492                         (void) zfs_error(hdl, EZFS_TAGTOOLONG, errbuf);
4493                         break;
4494                 case EINVAL:
4495                         (void) zfs_error(hdl, EZFS_BADTYPE, errbuf);
4496                         break;
4497                 case EEXIST:
4498                         (void) zfs_error(hdl, EZFS_REFTAG_HOLD, errbuf);
4499                         break;
4500                 default:
4501                         (void) zfs_standard_error(hdl,
4502                             fnvpair_value_int32(elem), errbuf);
4503                 }
4504         }
4505
4506         fnvlist_free(errors);
4507         return (ret);
4508 }
4509
4510 static int
4511 zfs_release_one(zfs_handle_t *zhp, void *arg)
4512 {
4513         struct holdarg *ha = arg;
4514         char name[ZFS_MAXNAMELEN];
4515         int rv = 0;
4516         nvlist_t *existing_holds;
4517
4518         (void) snprintf(name, sizeof (name),
4519             "%s@%s", zhp->zfs_name, ha->snapname);
4520
4521         if (lzc_get_holds(name, &existing_holds) != 0) {
4522                 ha->error = ENOENT;
4523         } else if (!nvlist_exists(existing_holds, ha->tag)) {
4524                 ha->error = ESRCH;
4525         } else {
4526                 nvlist_t *torelease = fnvlist_alloc();
4527                 fnvlist_add_boolean(torelease, ha->tag);
4528                 fnvlist_add_nvlist(ha->nvl, name, torelease);
4529                 fnvlist_free(torelease);
4530         }
4531
4532         if (ha->recursive)
4533                 rv = zfs_iter_filesystems(zhp, zfs_release_one, ha);
4534         zfs_close(zhp);
4535         return (rv);
4536 }
4537
4538 int
4539 zfs_release(zfs_handle_t *zhp, const char *snapname, const char *tag,
4540     boolean_t recursive)
4541 {
4542         int ret;
4543         struct holdarg ha;
4544         nvlist_t *errors = NULL;
4545         nvpair_t *elem;
4546         libzfs_handle_t *hdl = zhp->zfs_hdl;
4547         char errbuf[1024];
4548
4549         ha.nvl = fnvlist_alloc();
4550         ha.snapname = snapname;
4551         ha.tag = tag;
4552         ha.recursive = recursive;
4553         ha.error = 0;
4554         (void) zfs_release_one(zfs_handle_dup(zhp), &ha);
4555
4556         if (nvlist_empty(ha.nvl)) {
4557                 fnvlist_free(ha.nvl);
4558                 ret = ha.error;
4559                 (void) snprintf(errbuf, sizeof (errbuf),
4560                     dgettext(TEXT_DOMAIN,
4561                     "cannot release hold from snapshot '%s@%s'"),
4562                     zhp->zfs_name, snapname);
4563                 if (ret == ESRCH) {
4564                         (void) zfs_error(hdl, EZFS_REFTAG_RELE, errbuf);
4565                 } else {
4566                         (void) zfs_standard_error(hdl, ret, errbuf);
4567                 }
4568                 return (ret);
4569         }
4570
4571         ret = lzc_release(ha.nvl, &errors);
4572         fnvlist_free(ha.nvl);
4573
4574         if (ret == 0) {
4575                 /* There may be errors even in the success case. */
4576                 fnvlist_free(errors);
4577                 return (0);
4578         }
4579
4580         if (nvlist_empty(errors)) {
4581                 /* no hold-specific errors */
4582                 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
4583                     "cannot release"));
4584                 switch (errno) {
4585                 case ENOTSUP:
4586                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4587                             "pool must be upgraded"));
4588                         (void) zfs_error(hdl, EZFS_BADVERSION, errbuf);
4589                         break;
4590                 default:
4591                         (void) zfs_standard_error_fmt(hdl, errno, errbuf);
4592                 }
4593         }
4594
4595         for (elem = nvlist_next_nvpair(errors, NULL);
4596             elem != NULL;
4597             elem = nvlist_next_nvpair(errors, elem)) {
4598                 (void) snprintf(errbuf, sizeof (errbuf),
4599                     dgettext(TEXT_DOMAIN,
4600                     "cannot release hold from snapshot '%s'"),
4601                     nvpair_name(elem));
4602                 switch (fnvpair_value_int32(elem)) {
4603                 case ESRCH:
4604                         (void) zfs_error(hdl, EZFS_REFTAG_RELE, errbuf);
4605                         break;
4606                 case EINVAL:
4607                         (void) zfs_error(hdl, EZFS_BADTYPE, errbuf);
4608                         break;
4609                 default:
4610                         (void) zfs_standard_error_fmt(hdl,
4611                             fnvpair_value_int32(elem), errbuf);
4612                 }
4613         }
4614
4615         fnvlist_free(errors);
4616         return (ret);
4617 }
4618
4619 int
4620 zfs_get_fsacl(zfs_handle_t *zhp, nvlist_t **nvl)
4621 {
4622         zfs_cmd_t zc = { 0 };
4623         libzfs_handle_t *hdl = zhp->zfs_hdl;
4624         int nvsz = 2048;
4625         void *nvbuf;
4626         int err = 0;
4627         char errbuf[1024];
4628
4629         assert(zhp->zfs_type == ZFS_TYPE_VOLUME ||
4630             zhp->zfs_type == ZFS_TYPE_FILESYSTEM);
4631
4632 tryagain:
4633
4634         nvbuf = malloc(nvsz);
4635         if (nvbuf == NULL) {
4636                 err = (zfs_error(hdl, EZFS_NOMEM, strerror(errno)));
4637                 goto out;
4638         }
4639
4640         zc.zc_nvlist_dst_size = nvsz;
4641         zc.zc_nvlist_dst = (uintptr_t)nvbuf;
4642
4643         (void) strlcpy(zc.zc_name, zhp->zfs_name, ZFS_MAXNAMELEN);
4644
4645         if (ioctl(hdl->libzfs_fd, ZFS_IOC_GET_FSACL, &zc) != 0) {
4646                 (void) snprintf(errbuf, sizeof (errbuf),
4647                     dgettext(TEXT_DOMAIN, "cannot get permissions on '%s'"),
4648                     zc.zc_name);
4649                 switch (errno) {
4650                 case ENOMEM:
4651                         free(nvbuf);
4652                         nvsz = zc.zc_nvlist_dst_size;
4653                         goto tryagain;
4654
4655                 case ENOTSUP:
4656                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4657                             "pool must be upgraded"));
4658                         err = zfs_error(hdl, EZFS_BADVERSION, errbuf);
4659                         break;
4660                 case EINVAL:
4661                         err = zfs_error(hdl, EZFS_BADTYPE, errbuf);
4662                         break;
4663                 case ENOENT:
4664                         err = zfs_error(hdl, EZFS_NOENT, errbuf);
4665                         break;
4666                 default:
4667                         err = zfs_standard_error_fmt(hdl, errno, errbuf);
4668                         break;
4669                 }
4670         } else {
4671                 /* success */
4672                 int rc = nvlist_unpack(nvbuf, zc.zc_nvlist_dst_size, nvl, 0);
4673                 if (rc) {
4674                         (void) snprintf(errbuf, sizeof (errbuf), dgettext(
4675                             TEXT_DOMAIN, "cannot get permissions on '%s'"),
4676                             zc.zc_name);
4677                         err = zfs_standard_error_fmt(hdl, rc, errbuf);
4678                 }
4679         }
4680
4681         free(nvbuf);
4682 out:
4683         return (err);
4684 }
4685
4686 int
4687 zfs_set_fsacl(zfs_handle_t *zhp, boolean_t un, nvlist_t *nvl)
4688 {
4689         zfs_cmd_t zc = { 0 };
4690         libzfs_handle_t *hdl = zhp->zfs_hdl;
4691         char *nvbuf;
4692         char errbuf[1024];
4693         size_t nvsz;
4694         int err;
4695
4696         assert(zhp->zfs_type == ZFS_TYPE_VOLUME ||
4697             zhp->zfs_type == ZFS_TYPE_FILESYSTEM);
4698
4699         err = nvlist_size(nvl, &nvsz, NV_ENCODE_NATIVE);
4700         assert(err == 0);
4701
4702         nvbuf = malloc(nvsz);
4703
4704         err = nvlist_pack(nvl, &nvbuf, &nvsz, NV_ENCODE_NATIVE, 0);
4705         assert(err == 0);
4706
4707         zc.zc_nvlist_src_size = nvsz;
4708         zc.zc_nvlist_src = (uintptr_t)nvbuf;
4709         zc.zc_perm_action = un;
4710
4711         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
4712
4713         if (zfs_ioctl(hdl, ZFS_IOC_SET_FSACL, &zc) != 0) {
4714                 (void) snprintf(errbuf, sizeof (errbuf),
4715                     dgettext(TEXT_DOMAIN, "cannot set permissions on '%s'"),
4716                     zc.zc_name);
4717                 switch (errno) {
4718                 case ENOTSUP:
4719                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4720                             "pool must be upgraded"));
4721                         err = zfs_error(hdl, EZFS_BADVERSION, errbuf);
4722                         break;
4723                 case EINVAL:
4724                         err = zfs_error(hdl, EZFS_BADTYPE, errbuf);
4725                         break;
4726                 case ENOENT:
4727                         err = zfs_error(hdl, EZFS_NOENT, errbuf);
4728                         break;
4729                 default:
4730                         err = zfs_standard_error_fmt(hdl, errno, errbuf);
4731                         break;
4732                 }
4733         }
4734
4735         free(nvbuf);
4736
4737         return (err);
4738 }
4739
4740 int
4741 zfs_get_holds(zfs_handle_t *zhp, nvlist_t **nvl)
4742 {
4743         int err;
4744         char errbuf[1024];
4745
4746         err = lzc_get_holds(zhp->zfs_name, nvl);
4747
4748         if (err != 0) {
4749                 libzfs_handle_t *hdl = zhp->zfs_hdl;
4750
4751                 (void) snprintf(errbuf, sizeof (errbuf),
4752                     dgettext(TEXT_DOMAIN, "cannot get holds for '%s'"),
4753                     zhp->zfs_name);
4754                 switch (err) {
4755                 case ENOTSUP:
4756                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4757                             "pool must be upgraded"));
4758                         err = zfs_error(hdl, EZFS_BADVERSION, errbuf);
4759                         break;
4760                 case EINVAL:
4761                         err = zfs_error(hdl, EZFS_BADTYPE, errbuf);
4762                         break;
4763                 case ENOENT:
4764                         err = zfs_error(hdl, EZFS_NOENT, errbuf);
4765                         break;
4766                 default:
4767                         err = zfs_standard_error_fmt(hdl, errno, errbuf);
4768                         break;
4769                 }
4770         }
4771
4772         return (err);
4773 }
4774
4775 /*
4776  * Convert the zvol's volume size to an appropriate reservation.
4777  * Note: If this routine is updated, it is necessary to update the ZFS test
4778  * suite's shell version in reservation.kshlib.
4779  */
4780 uint64_t
4781 zvol_volsize_to_reservation(uint64_t volsize, nvlist_t *props)
4782 {
4783         uint64_t numdb;
4784         uint64_t nblocks, volblocksize;
4785         int ncopies;
4786         char *strval;
4787
4788         if (nvlist_lookup_string(props,
4789             zfs_prop_to_name(ZFS_PROP_COPIES), &strval) == 0)
4790                 ncopies = atoi(strval);
4791         else
4792                 ncopies = 1;
4793         if (nvlist_lookup_uint64(props,
4794             zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE),
4795             &volblocksize) != 0)
4796                 volblocksize = ZVOL_DEFAULT_BLOCKSIZE;
4797         nblocks = volsize/volblocksize;
4798         /* start with metadnode L0-L6 */
4799         numdb = 7;
4800         /* calculate number of indirects */
4801         while (nblocks > 1) {
4802                 nblocks += DNODES_PER_LEVEL - 1;
4803                 nblocks /= DNODES_PER_LEVEL;
4804                 numdb += nblocks;
4805         }
4806         numdb *= MIN(SPA_DVAS_PER_BP, ncopies + 1);
4807         volsize *= ncopies;
4808         /*
4809          * this is exactly DN_MAX_INDBLKSHIFT when metadata isn't
4810          * compressed, but in practice they compress down to about
4811          * 1100 bytes
4812          */
4813         numdb *= 1ULL << DN_MAX_INDBLKSHIFT;
4814         volsize += numdb;
4815         return (volsize);
4816 }
4817
4818 /*
4819  * Attach/detach the given filesystem to/from the given jail.
4820  */
4821 int
4822 zfs_jail(zfs_handle_t *zhp, int jailid, int attach)
4823 {
4824         libzfs_handle_t *hdl = zhp->zfs_hdl;
4825         zfs_cmd_t zc = { 0 };
4826         char errbuf[1024];
4827         unsigned long cmd;
4828         int ret;
4829
4830         if (attach) {
4831                 (void) snprintf(errbuf, sizeof (errbuf),
4832                     dgettext(TEXT_DOMAIN, "cannot jail '%s'"), zhp->zfs_name);
4833         } else {
4834                 (void) snprintf(errbuf, sizeof (errbuf),
4835                     dgettext(TEXT_DOMAIN, "cannot unjail '%s'"), zhp->zfs_name);
4836         }
4837
4838         switch (zhp->zfs_type) {
4839         case ZFS_TYPE_VOLUME:
4840                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4841                     "volumes can not be jailed"));
4842                 return (zfs_error(hdl, EZFS_BADTYPE, errbuf));
4843         case ZFS_TYPE_SNAPSHOT:
4844                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4845                     "snapshots can not be jailed"));
4846                 return (zfs_error(hdl, EZFS_BADTYPE, errbuf));
4847         }
4848         assert(zhp->zfs_type == ZFS_TYPE_FILESYSTEM);
4849
4850         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
4851         zc.zc_objset_type = DMU_OST_ZFS;
4852         zc.zc_jailid = jailid;
4853
4854         cmd = attach ? ZFS_IOC_JAIL : ZFS_IOC_UNJAIL;
4855         if ((ret = ioctl(hdl->libzfs_fd, cmd, &zc)) != 0)
4856                 zfs_standard_error(hdl, errno, errbuf);
4857
4858         return (ret);
4859 }