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