lib/libzfs/libzfs_dataset.c

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or 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) 2018, Joyent, Inc. All rights reserved.
  25  * Copyright (c) 2011, 2017 by Delphix. All rights reserved.
  26  * Copyright (c) 2012 DEY Storage Systems, Inc.  All rights reserved.
  27  * Copyright (c) 2012 Pawel Jakub Dawidek <pawel@dawidek.net>.
  28  * Copyright (c) 2013 Martin Matuska. All rights reserved.
  29  * Copyright (c) 2013 Steven Hartland. All rights reserved.
  30  * Copyright 2017 Nexenta Systems, Inc.
  31  * Copyright 2016 Igor Kozhukhov <ikozhukhov@gmail.com>
  32  * Copyright 2017-2018 RackTop Systems.
  33  * Copyright (c) 2019 Datto Inc.
  34  */
  35
  36 #include <ctype.h>
  37 #include <errno.h>
  38 #include <libintl.h>
  39 #include <stdio.h>
  40 #include <stdlib.h>
  41 #include <strings.h>
  42 #include <unistd.h>
  43 #include <stddef.h>
  44 #include <zone.h>
  45 #include <fcntl.h>
  46 #include <sys/mntent.h>
  47 #include <sys/mount.h>
  48 #include <pwd.h>
  49 #include <grp.h>
  50 #include <stddef.h>
  51 #include <ucred.h>
  52 #ifdef HAVE_IDMAP
  53 #include <idmap.h>
  54 #include <aclutils.h>
  55 #include <directory.h>
  56 #endif /* HAVE_IDMAP */
  57
  58 #include <sys/dnode.h>
  59 #include <sys/spa.h>
  60 #include <sys/zap.h>
  61 #include <sys/dsl_crypt.h>
  62 #include <libzfs.h>
  63 #include <libzutil.h>
  64
  65 #include "zfs_namecheck.h"
  66 #include "zfs_prop.h"
  67 #include "libzfs_impl.h"
  68 #include "libzfs.h"
  69 #include "zfs_deleg.h"
  70
  71 static int userquota_propname_decode(const char *propname, boolean_t zoned,
  72     zfs_userquota_prop_t *typep, char *domain, int domainlen, uint64_t *ridp);
  73
  74 /*
  75  * Given a single type (not a mask of types), return the type in a human
  76  * readable form.
  77  */
  78 const char *
  79 zfs_type_to_name(zfs_type_t type)
  80 {
  81         switch (type) {
  82         case ZFS_TYPE_FILESYSTEM:
  83                 return (dgettext(TEXT_DOMAIN, "filesystem"));
  84         case ZFS_TYPE_SNAPSHOT:
  85                 return (dgettext(TEXT_DOMAIN, "snapshot"));
  86         case ZFS_TYPE_VOLUME:
  87                 return (dgettext(TEXT_DOMAIN, "volume"));
  88         case ZFS_TYPE_POOL:
  89                 return (dgettext(TEXT_DOMAIN, "pool"));
  90         case ZFS_TYPE_BOOKMARK:
  91                 return (dgettext(TEXT_DOMAIN, "bookmark"));
  92         default:
  93                 assert(!"unhandled zfs_type_t");
  94         }
  95
  96         return (NULL);
  97 }
  98
  99 /*
 100  * Validate a ZFS path.  This is used even before trying to open the dataset, to
 101  * provide a more meaningful error message.  We call zfs_error_aux() to
 102  * explain exactly why the name was not valid.
 103  */
 104 int
 105 zfs_validate_name(libzfs_handle_t *hdl, const char *path, int type,
 106     boolean_t modifying)
 107 {
 108         namecheck_err_t why;
 109         char what;
 110
 111         if (!(type & ZFS_TYPE_SNAPSHOT) && strchr(path, '@') != NULL) {
 112                 if (hdl != NULL)
 113                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 114                             "snapshot delimiter '@' is not expected here"));
 115                 return (0);
 116         }
 117
 118         if (type == ZFS_TYPE_SNAPSHOT && strchr(path, '@') == NULL) {
 119                 if (hdl != NULL)
 120                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 121                             "missing '@' delimiter in snapshot name, "
 122                             "did you mean to use -r?"));
 123                 return (0);
 124         }
 125
 126         if (!(type & ZFS_TYPE_BOOKMARK) && strchr(path, '#') != NULL) {
 127                 if (hdl != NULL)
 128                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 129                             "bookmark delimiter '#' is not expected here"));
 130                 return (0);
 131         }
 132
 133         if (type == ZFS_TYPE_BOOKMARK && strchr(path, '#') == NULL) {
 134                 if (hdl != NULL)
 135                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 136                             "missing '#' delimiter in bookmark name, "
 137                             "did you mean to use -r?"));
 138                 return (0);
 139         }
 140
 141         if (modifying && strchr(path, '%') != NULL) {
 142                 if (hdl != NULL)
 143                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 144                             "invalid character %c in name"), '%');
 145                 return (0);
 146         }
 147
 148         if (entity_namecheck(path, &why, &what) != 0) {
 149                 if (hdl != NULL) {
 150                         switch (why) {
 151                         case NAME_ERR_TOOLONG:
 152                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 153                                     "name is too long"));
 154                                 break;
 155
 156                         case NAME_ERR_LEADING_SLASH:
 157                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 158                                     "leading slash in name"));
 159                                 break;
 160
 161                         case NAME_ERR_EMPTY_COMPONENT:
 162                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 163                                     "empty component or misplaced '@'"
 164                                     " or '#' delimiter in name"));
 165                                 break;
 166
 167                         case NAME_ERR_TRAILING_SLASH:
 168                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 169                                     "trailing slash in name"));
 170                                 break;
 171
 172                         case NAME_ERR_INVALCHAR:
 173                                 zfs_error_aux(hdl,
 174                                     dgettext(TEXT_DOMAIN, "invalid character "
 175                                     "'%c' in name"), what);
 176                                 break;
 177
 178                         case NAME_ERR_MULTIPLE_DELIMITERS:
 179                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 180                                     "multiple '@' and/or '#' delimiters in "
 181                                     "name"));
 182                                 break;
 183
 184                         case NAME_ERR_NOLETTER:
 185                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 186                                     "pool doesn't begin with a letter"));
 187                                 break;
 188
 189                         case NAME_ERR_RESERVED:
 190                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 191                                     "name is reserved"));
 192                                 break;
 193
 194                         case NAME_ERR_DISKLIKE:
 195                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 196                                     "reserved disk name"));
 197                                 break;
 198
 199                         default:
 200                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 201                                     "(%d) not defined"), why);
 202                                 break;
 203                         }
 204                 }
 205
 206                 return (0);
 207         }
 208
 209         return (-1);
 210 }
 211
 212 int
 213 zfs_name_valid(const char *name, zfs_type_t type)
 214 {
 215         if (type == ZFS_TYPE_POOL)
 216                 return (zpool_name_valid(NULL, B_FALSE, name));
 217         return (zfs_validate_name(NULL, name, type, B_FALSE));
 218 }
 219
 220 /*
 221  * This function takes the raw DSL properties, and filters out the user-defined
 222  * properties into a separate nvlist.
 223  */
 224 static nvlist_t *
 225 process_user_props(zfs_handle_t *zhp, nvlist_t *props)
 226 {
 227         libzfs_handle_t *hdl = zhp->zfs_hdl;
 228         nvpair_t *elem;
 229         nvlist_t *propval;
 230         nvlist_t *nvl;
 231
 232         if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0) != 0) {
 233                 (void) no_memory(hdl);
 234                 return (NULL);
 235         }
 236
 237         elem = NULL;
 238         while ((elem = nvlist_next_nvpair(props, elem)) != NULL) {
 239                 if (!zfs_prop_user(nvpair_name(elem)))
 240                         continue;
 241
 242                 verify(nvpair_value_nvlist(elem, &propval) == 0);
 243                 if (nvlist_add_nvlist(nvl, nvpair_name(elem), propval) != 0) {
 244                         nvlist_free(nvl);
 245                         (void) no_memory(hdl);
 246                         return (NULL);
 247                 }
 248         }
 249
 250         return (nvl);
 251 }
 252
 253 static zpool_handle_t *
 254 zpool_add_handle(zfs_handle_t *zhp, const char *pool_name)
 255 {
 256         libzfs_handle_t *hdl = zhp->zfs_hdl;
 257         zpool_handle_t *zph;
 258
 259         if ((zph = zpool_open_canfail(hdl, pool_name)) != NULL) {
 260                 if (hdl->libzfs_pool_handles != NULL)
 261                         zph->zpool_next = hdl->libzfs_pool_handles;
 262                 hdl->libzfs_pool_handles = zph;
 263         }
 264         return (zph);
 265 }
 266
 267 static zpool_handle_t *
 268 zpool_find_handle(zfs_handle_t *zhp, const char *pool_name, int len)
 269 {
 270         libzfs_handle_t *hdl = zhp->zfs_hdl;
 271         zpool_handle_t *zph = hdl->libzfs_pool_handles;
 272
 273         while ((zph != NULL) &&
 274             (strncmp(pool_name, zpool_get_name(zph), len) != 0))
 275                 zph = zph->zpool_next;
 276         return (zph);
 277 }
 278
 279 /*
 280  * Returns a handle to the pool that contains the provided dataset.
 281  * If a handle to that pool already exists then that handle is returned.
 282  * Otherwise, a new handle is created and added to the list of handles.
 283  */
 284 static zpool_handle_t *
 285 zpool_handle(zfs_handle_t *zhp)
 286 {
 287         char *pool_name;
 288         int len;
 289         zpool_handle_t *zph;
 290
 291         len = strcspn(zhp->zfs_name, "/@#") + 1;
 292         pool_name = zfs_alloc(zhp->zfs_hdl, len);
 293         (void) strlcpy(pool_name, zhp->zfs_name, len);
 294
 295         zph = zpool_find_handle(zhp, pool_name, len);
 296         if (zph == NULL)
 297                 zph = zpool_add_handle(zhp, pool_name);
 298
 299         free(pool_name);
 300         return (zph);
 301 }
 302
 303 void
 304 zpool_free_handles(libzfs_handle_t *hdl)
 305 {
 306         zpool_handle_t *next, *zph = hdl->libzfs_pool_handles;
 307
 308         while (zph != NULL) {
 309                 next = zph->zpool_next;
 310                 zpool_close(zph);
 311                 zph = next;
 312         }
 313         hdl->libzfs_pool_handles = NULL;
 314 }
 315
 316 /*
 317  * Utility function to gather stats (objset and zpl) for the given object.
 318  */
 319 static int
 320 get_stats_ioctl(zfs_handle_t *zhp, zfs_cmd_t *zc)
 321 {
 322         libzfs_handle_t *hdl = zhp->zfs_hdl;
 323
 324         (void) strlcpy(zc->zc_name, zhp->zfs_name, sizeof (zc->zc_name));
 325
 326         while (ioctl(hdl->libzfs_fd, ZFS_IOC_OBJSET_STATS, zc) != 0) {
 327                 if (errno == ENOMEM) {
 328                         if (zcmd_expand_dst_nvlist(hdl, zc) != 0) {
 329                                 return (-1);
 330                         }
 331                 } else {
 332                         return (-1);
 333                 }
 334         }
 335         return (0);
 336 }
 337
 338 /*
 339  * Utility function to get the received properties of the given object.
 340  */
 341 static int
 342 get_recvd_props_ioctl(zfs_handle_t *zhp)
 343 {
 344         libzfs_handle_t *hdl = zhp->zfs_hdl;
 345         nvlist_t *recvdprops;
 346         zfs_cmd_t zc = {"\0"};
 347         int err;
 348
 349         if (zcmd_alloc_dst_nvlist(hdl, &zc, 0) != 0)
 350                 return (-1);
 351
 352         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
 353
 354         while (ioctl(hdl->libzfs_fd, ZFS_IOC_OBJSET_RECVD_PROPS, &zc) != 0) {
 355                 if (errno == ENOMEM) {
 356                         if (zcmd_expand_dst_nvlist(hdl, &zc) != 0) {
 357                                 return (-1);
 358                         }
 359                 } else {
 360                         zcmd_free_nvlists(&zc);
 361                         return (-1);
 362                 }
 363         }
 364
 365         err = zcmd_read_dst_nvlist(zhp->zfs_hdl, &zc, &recvdprops);
 366         zcmd_free_nvlists(&zc);
 367         if (err != 0)
 368                 return (-1);
 369
 370         nvlist_free(zhp->zfs_recvd_props);
 371         zhp->zfs_recvd_props = recvdprops;
 372
 373         return (0);
 374 }
 375
 376 static int
 377 put_stats_zhdl(zfs_handle_t *zhp, zfs_cmd_t *zc)
 378 {
 379         nvlist_t *allprops, *userprops;
 380
 381         zhp->zfs_dmustats = zc->zc_objset_stats; /* structure assignment */
 382
 383         if (zcmd_read_dst_nvlist(zhp->zfs_hdl, zc, &allprops) != 0) {
 384                 return (-1);
 385         }
 386
 387         /*
 388          * XXX Why do we store the user props separately, in addition to
 389          * storing them in zfs_props?
 390          */
 391         if ((userprops = process_user_props(zhp, allprops)) == NULL) {
 392                 nvlist_free(allprops);
 393                 return (-1);
 394         }
 395
 396         nvlist_free(zhp->zfs_props);
 397         nvlist_free(zhp->zfs_user_props);
 398
 399         zhp->zfs_props = allprops;
 400         zhp->zfs_user_props = userprops;
 401
 402         return (0);
 403 }
 404
 405 static int
 406 get_stats(zfs_handle_t *zhp)
 407 {
 408         int rc = 0;
 409         zfs_cmd_t zc = {"\0"};
 410
 411         if (zcmd_alloc_dst_nvlist(zhp->zfs_hdl, &zc, 0) != 0)
 412                 return (-1);
 413         if (get_stats_ioctl(zhp, &zc) != 0)
 414                 rc = -1;
 415         else if (put_stats_zhdl(zhp, &zc) != 0)
 416                 rc = -1;
 417         zcmd_free_nvlists(&zc);
 418         return (rc);
 419 }
 420
 421 /*
 422  * Refresh the properties currently stored in the handle.
 423  */
 424 void
 425 zfs_refresh_properties(zfs_handle_t *zhp)
 426 {
 427         (void) get_stats(zhp);
 428 }
 429
 430 /*
 431  * Makes a handle from the given dataset name.  Used by zfs_open() and
 432  * zfs_iter_* to create child handles on the fly.
 433  */
 434 static int
 435 make_dataset_handle_common(zfs_handle_t *zhp, zfs_cmd_t *zc)
 436 {
 437         if (put_stats_zhdl(zhp, zc) != 0)
 438                 return (-1);
 439
 440         /*
 441          * We've managed to open the dataset and gather statistics.  Determine
 442          * the high-level type.
 443          */
 444         if (zhp->zfs_dmustats.dds_type == DMU_OST_ZVOL)
 445                 zhp->zfs_head_type = ZFS_TYPE_VOLUME;
 446         else if (zhp->zfs_dmustats.dds_type == DMU_OST_ZFS)
 447                 zhp->zfs_head_type = ZFS_TYPE_FILESYSTEM;
 448         else if (zhp->zfs_dmustats.dds_type == DMU_OST_OTHER)
 449                 return (-1);
 450         else
 451                 abort();
 452
 453         if (zhp->zfs_dmustats.dds_is_snapshot)
 454                 zhp->zfs_type = ZFS_TYPE_SNAPSHOT;
 455         else if (zhp->zfs_dmustats.dds_type == DMU_OST_ZVOL)
 456                 zhp->zfs_type = ZFS_TYPE_VOLUME;
 457         else if (zhp->zfs_dmustats.dds_type == DMU_OST_ZFS)
 458                 zhp->zfs_type = ZFS_TYPE_FILESYSTEM;
 459         else
 460                 abort();        /* we should never see any other types */
 461
 462         if ((zhp->zpool_hdl = zpool_handle(zhp)) == NULL)
 463                 return (-1);
 464
 465         return (0);
 466 }
 467
 468 zfs_handle_t *
 469 make_dataset_handle(libzfs_handle_t *hdl, const char *path)
 470 {
 471         zfs_cmd_t zc = {"\0"};
 472
 473         zfs_handle_t *zhp = calloc(1, sizeof (zfs_handle_t));
 474
 475         if (zhp == NULL)
 476                 return (NULL);
 477
 478         zhp->zfs_hdl = hdl;
 479         (void) strlcpy(zhp->zfs_name, path, sizeof (zhp->zfs_name));
 480         if (zcmd_alloc_dst_nvlist(hdl, &zc, 0) != 0) {
 481                 free(zhp);
 482                 return (NULL);
 483         }
 484         if (get_stats_ioctl(zhp, &zc) == -1) {
 485                 zcmd_free_nvlists(&zc);
 486                 free(zhp);
 487                 return (NULL);
 488         }
 489         if (make_dataset_handle_common(zhp, &zc) == -1) {
 490                 free(zhp);
 491                 zhp = NULL;
 492         }
 493         zcmd_free_nvlists(&zc);
 494         return (zhp);
 495 }
 496
 497 zfs_handle_t *
 498 make_dataset_handle_zc(libzfs_handle_t *hdl, zfs_cmd_t *zc)
 499 {
 500         zfs_handle_t *zhp = calloc(1, sizeof (zfs_handle_t));
 501
 502         if (zhp == NULL)
 503                 return (NULL);
 504
 505         zhp->zfs_hdl = hdl;
 506         (void) strlcpy(zhp->zfs_name, zc->zc_name, sizeof (zhp->zfs_name));
 507         if (make_dataset_handle_common(zhp, zc) == -1) {
 508                 free(zhp);
 509                 return (NULL);
 510         }
 511         return (zhp);
 512 }
 513
 514 zfs_handle_t *
 515 make_dataset_simple_handle_zc(zfs_handle_t *pzhp, zfs_cmd_t *zc)
 516 {
 517         zfs_handle_t *zhp = calloc(1, sizeof (zfs_handle_t));
 518
 519         if (zhp == NULL)
 520                 return (NULL);
 521
 522         zhp->zfs_hdl = pzhp->zfs_hdl;
 523         (void) strlcpy(zhp->zfs_name, zc->zc_name, sizeof (zhp->zfs_name));
 524         zhp->zfs_head_type = pzhp->zfs_type;
 525         zhp->zfs_type = ZFS_TYPE_SNAPSHOT;
 526         zhp->zpool_hdl = zpool_handle(zhp);
 527
 528         return (zhp);
 529 }
 530
 531 zfs_handle_t *
 532 zfs_handle_dup(zfs_handle_t *zhp_orig)
 533 {
 534         zfs_handle_t *zhp = calloc(1, sizeof (zfs_handle_t));
 535
 536         if (zhp == NULL)
 537                 return (NULL);
 538
 539         zhp->zfs_hdl = zhp_orig->zfs_hdl;
 540         zhp->zpool_hdl = zhp_orig->zpool_hdl;
 541         (void) strlcpy(zhp->zfs_name, zhp_orig->zfs_name,
 542             sizeof (zhp->zfs_name));
 543         zhp->zfs_type = zhp_orig->zfs_type;
 544         zhp->zfs_head_type = zhp_orig->zfs_head_type;
 545         zhp->zfs_dmustats = zhp_orig->zfs_dmustats;
 546         if (zhp_orig->zfs_props != NULL) {
 547                 if (nvlist_dup(zhp_orig->zfs_props, &zhp->zfs_props, 0) != 0) {
 548                         (void) no_memory(zhp->zfs_hdl);
 549                         zfs_close(zhp);
 550                         return (NULL);
 551                 }
 552         }
 553         if (zhp_orig->zfs_user_props != NULL) {
 554                 if (nvlist_dup(zhp_orig->zfs_user_props,
 555                     &zhp->zfs_user_props, 0) != 0) {
 556                         (void) no_memory(zhp->zfs_hdl);
 557                         zfs_close(zhp);
 558                         return (NULL);
 559                 }
 560         }
 561         if (zhp_orig->zfs_recvd_props != NULL) {
 562                 if (nvlist_dup(zhp_orig->zfs_recvd_props,
 563                     &zhp->zfs_recvd_props, 0)) {
 564                         (void) no_memory(zhp->zfs_hdl);
 565                         zfs_close(zhp);
 566                         return (NULL);
 567                 }
 568         }
 569         zhp->zfs_mntcheck = zhp_orig->zfs_mntcheck;
 570         if (zhp_orig->zfs_mntopts != NULL) {
 571                 zhp->zfs_mntopts = zfs_strdup(zhp_orig->zfs_hdl,
 572                     zhp_orig->zfs_mntopts);
 573         }
 574         zhp->zfs_props_table = zhp_orig->zfs_props_table;
 575         return (zhp);
 576 }
 577
 578 boolean_t
 579 zfs_bookmark_exists(const char *path)
 580 {
 581         nvlist_t *bmarks;
 582         nvlist_t *props;
 583         char fsname[ZFS_MAX_DATASET_NAME_LEN];
 584         char *bmark_name;
 585         char *pound;
 586         int err;
 587         boolean_t rv;
 588
 589
 590         (void) strlcpy(fsname, path, sizeof (fsname));
 591         pound = strchr(fsname, '#');
 592         if (pound == NULL)
 593                 return (B_FALSE);
 594
 595         *pound = '\0';
 596         bmark_name = pound + 1;
 597         props = fnvlist_alloc();
 598         err = lzc_get_bookmarks(fsname, props, &bmarks);
 599         nvlist_free(props);
 600         if (err != 0) {
 601                 nvlist_free(bmarks);
 602                 return (B_FALSE);
 603         }
 604
 605         rv = nvlist_exists(bmarks, bmark_name);
 606         nvlist_free(bmarks);
 607         return (rv);
 608 }
 609
 610 zfs_handle_t *
 611 make_bookmark_handle(zfs_handle_t *parent, const char *path,
 612     nvlist_t *bmark_props)
 613 {
 614         zfs_handle_t *zhp = calloc(1, sizeof (zfs_handle_t));
 615
 616         if (zhp == NULL)
 617                 return (NULL);
 618
 619         /* Fill in the name. */
 620         zhp->zfs_hdl = parent->zfs_hdl;
 621         (void) strlcpy(zhp->zfs_name, path, sizeof (zhp->zfs_name));
 622
 623         /* Set the property lists. */
 624         if (nvlist_dup(bmark_props, &zhp->zfs_props, 0) != 0) {
 625                 free(zhp);
 626                 return (NULL);
 627         }
 628
 629         /* Set the types. */
 630         zhp->zfs_head_type = parent->zfs_head_type;
 631         zhp->zfs_type = ZFS_TYPE_BOOKMARK;
 632
 633         if ((zhp->zpool_hdl = zpool_handle(zhp)) == NULL) {
 634                 nvlist_free(zhp->zfs_props);
 635                 free(zhp);
 636                 return (NULL);
 637         }
 638
 639         return (zhp);
 640 }
 641
 642 struct zfs_open_bookmarks_cb_data {
 643         const char *path;
 644         zfs_handle_t *zhp;
 645 };
 646
 647 static int
 648 zfs_open_bookmarks_cb(zfs_handle_t *zhp, void *data)
 649 {
 650         struct zfs_open_bookmarks_cb_data *dp = data;
 651
 652         /*
 653          * Is it the one we are looking for?
 654          */
 655         if (strcmp(dp->path, zfs_get_name(zhp)) == 0) {
 656                 /*
 657                  * We found it.  Save it and let the caller know we are done.
 658                  */
 659                 dp->zhp = zhp;
 660                 return (EEXIST);
 661         }
 662
 663         /*
 664          * Not found.  Close the handle and ask for another one.
 665          */
 666         zfs_close(zhp);
 667         return (0);
 668 }
 669
 670 /*
 671  * Opens the given snapshot, bookmark, filesystem, or volume.   The 'types'
 672  * argument is a mask of acceptable types.  The function will print an
 673  * appropriate error message and return NULL if it can't be opened.
 674  */
 675 zfs_handle_t *
 676 zfs_open(libzfs_handle_t *hdl, const char *path, int types)
 677 {
 678         zfs_handle_t *zhp;
 679         char errbuf[1024];
 680         char *bookp;
 681
 682         (void) snprintf(errbuf, sizeof (errbuf),
 683             dgettext(TEXT_DOMAIN, "cannot open '%s'"), path);
 684
 685         /*
 686          * Validate the name before we even try to open it.
 687          */
 688         if (!zfs_validate_name(hdl, path, types, B_FALSE)) {
 689                 (void) zfs_error(hdl, EZFS_INVALIDNAME, errbuf);
 690                 return (NULL);
 691         }
 692
 693         /*
 694          * Bookmarks needs to be handled separately.
 695          */
 696         bookp = strchr(path, '#');
 697         if (bookp == NULL) {
 698                 /*
 699                  * Try to get stats for the dataset, which will tell us if it
 700                  * exists.
 701                  */
 702                 errno = 0;
 703                 if ((zhp = make_dataset_handle(hdl, path)) == NULL) {
 704                         (void) zfs_standard_error(hdl, errno, errbuf);
 705                         return (NULL);
 706                 }
 707         } else {
 708                 char dsname[ZFS_MAX_DATASET_NAME_LEN];
 709                 zfs_handle_t *pzhp;
 710                 struct zfs_open_bookmarks_cb_data cb_data = {path, NULL};
 711
 712                 /*
 713                  * We need to cut out '#' and everything after '#'
 714                  * to get the parent dataset name only.
 715                  */
 716                 assert(bookp - path < sizeof (dsname));
 717                 (void) strncpy(dsname, path, bookp - path);
 718                 dsname[bookp - path] = '\0';
 719
 720                 /*
 721                  * Create handle for the parent dataset.
 722                  */
 723                 errno = 0;
 724                 if ((pzhp = make_dataset_handle(hdl, dsname)) == NULL) {
 725                         (void) zfs_standard_error(hdl, errno, errbuf);
 726                         return (NULL);
 727                 }
 728
 729                 /*
 730                  * Iterate bookmarks to find the right one.
 731                  */
 732                 errno = 0;
 733                 if ((zfs_iter_bookmarks(pzhp, zfs_open_bookmarks_cb,
 734                     &cb_data) == 0) && (cb_data.zhp == NULL)) {
 735                         (void) zfs_error(hdl, EZFS_NOENT, errbuf);
 736                         zfs_close(pzhp);
 737                         return (NULL);
 738                 }
 739                 if (cb_data.zhp == NULL) {
 740                         (void) zfs_standard_error(hdl, errno, errbuf);
 741                         zfs_close(pzhp);
 742                         return (NULL);
 743                 }
 744                 zhp = cb_data.zhp;
 745
 746                 /*
 747                  * Cleanup.
 748                  */
 749                 zfs_close(pzhp);
 750         }
 751
 752         if (!(types & zhp->zfs_type)) {
 753                 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf);
 754                 zfs_close(zhp);
 755                 return (NULL);
 756         }
 757
 758         return (zhp);
 759 }
 760
 761 /*
 762  * Release a ZFS handle.  Nothing to do but free the associated memory.
 763  */
 764 void
 765 zfs_close(zfs_handle_t *zhp)
 766 {
 767         if (zhp->zfs_mntopts)
 768                 free(zhp->zfs_mntopts);
 769         nvlist_free(zhp->zfs_props);
 770         nvlist_free(zhp->zfs_user_props);
 771         nvlist_free(zhp->zfs_recvd_props);
 772         free(zhp);
 773 }
 774
 775 typedef struct mnttab_node {
 776         struct mnttab mtn_mt;
 777         avl_node_t mtn_node;
 778 } mnttab_node_t;
 779
 780 static int
 781 libzfs_mnttab_cache_compare(const void *arg1, const void *arg2)
 782 {
 783         const mnttab_node_t *mtn1 = (const mnttab_node_t *)arg1;
 784         const mnttab_node_t *mtn2 = (const mnttab_node_t *)arg2;
 785         int rv;
 786
 787         rv = strcmp(mtn1->mtn_mt.mnt_special, mtn2->mtn_mt.mnt_special);
 788
 789         return (AVL_ISIGN(rv));
 790 }
 791
 792 void
 793 libzfs_mnttab_init(libzfs_handle_t *hdl)
 794 {
 795         pthread_mutex_init(&hdl->libzfs_mnttab_cache_lock, NULL);
 796         assert(avl_numnodes(&hdl->libzfs_mnttab_cache) == 0);
 797         avl_create(&hdl->libzfs_mnttab_cache, libzfs_mnttab_cache_compare,
 798             sizeof (mnttab_node_t), offsetof(mnttab_node_t, mtn_node));
 799 }
 800
 801 int
 802 libzfs_mnttab_update(libzfs_handle_t *hdl)
 803 {
 804         struct mnttab entry;
 805
 806         /* Reopen MNTTAB to prevent reading stale data from open file */
 807         if (freopen(MNTTAB, "r", hdl->libzfs_mnttab) == NULL)
 808                 return (ENOENT);
 809
 810         while (getmntent(hdl->libzfs_mnttab, &entry) == 0) {
 811                 mnttab_node_t *mtn;
 812                 avl_index_t where;
 813
 814                 if (strcmp(entry.mnt_fstype, MNTTYPE_ZFS) != 0)
 815                         continue;
 816
 817                 mtn = zfs_alloc(hdl, sizeof (mnttab_node_t));
 818                 mtn->mtn_mt.mnt_special = zfs_strdup(hdl, entry.mnt_special);
 819                 mtn->mtn_mt.mnt_mountp = zfs_strdup(hdl, entry.mnt_mountp);
 820                 mtn->mtn_mt.mnt_fstype = zfs_strdup(hdl, entry.mnt_fstype);
 821                 mtn->mtn_mt.mnt_mntopts = zfs_strdup(hdl, entry.mnt_mntopts);
 822
 823                 /* Exclude duplicate mounts */
 824                 if (avl_find(&hdl->libzfs_mnttab_cache, mtn, &where) != NULL) {
 825                         free(mtn->mtn_mt.mnt_special);
 826                         free(mtn->mtn_mt.mnt_mountp);
 827                         free(mtn->mtn_mt.mnt_fstype);
 828                         free(mtn->mtn_mt.mnt_mntopts);
 829                         free(mtn);
 830                         continue;
 831                 }
 832
 833                 avl_add(&hdl->libzfs_mnttab_cache, mtn);
 834         }
 835
 836         return (0);
 837 }
 838
 839 void
 840 libzfs_mnttab_fini(libzfs_handle_t *hdl)
 841 {
 842         void *cookie = NULL;
 843         mnttab_node_t *mtn;
 844
 845         while ((mtn = avl_destroy_nodes(&hdl->libzfs_mnttab_cache, &cookie))
 846             != NULL) {
 847                 free(mtn->mtn_mt.mnt_special);
 848                 free(mtn->mtn_mt.mnt_mountp);
 849                 free(mtn->mtn_mt.mnt_fstype);
 850                 free(mtn->mtn_mt.mnt_mntopts);
 851                 free(mtn);
 852         }
 853         avl_destroy(&hdl->libzfs_mnttab_cache);
 854         (void) pthread_mutex_destroy(&hdl->libzfs_mnttab_cache_lock);
 855 }
 856
 857 void
 858 libzfs_mnttab_cache(libzfs_handle_t *hdl, boolean_t enable)
 859 {
 860         hdl->libzfs_mnttab_enable = enable;
 861 }
 862
 863 int
 864 libzfs_mnttab_find(libzfs_handle_t *hdl, const char *fsname,
 865     struct mnttab *entry)
 866 {
 867         mnttab_node_t find;
 868         mnttab_node_t *mtn;
 869         int ret = ENOENT;
 870
 871         if (!hdl->libzfs_mnttab_enable) {
 872                 struct mnttab srch = { 0 };
 873
 874                 if (avl_numnodes(&hdl->libzfs_mnttab_cache))
 875                         libzfs_mnttab_fini(hdl);
 876
 877                 /* Reopen MNTTAB to prevent reading stale data from open file */
 878                 if (freopen(MNTTAB, "r", hdl->libzfs_mnttab) == NULL)
 879                         return (ENOENT);
 880
 881                 srch.mnt_special = (char *)fsname;
 882                 srch.mnt_fstype = MNTTYPE_ZFS;
 883                 if (getmntany(hdl->libzfs_mnttab, entry, &srch) == 0)
 884                         return (0);
 885                 else
 886                         return (ENOENT);
 887         }
 888
 889         pthread_mutex_lock(&hdl->libzfs_mnttab_cache_lock);
 890         if (avl_numnodes(&hdl->libzfs_mnttab_cache) == 0) {
 891                 int error;
 892
 893                 if ((error = libzfs_mnttab_update(hdl)) != 0) {
 894                         pthread_mutex_unlock(&hdl->libzfs_mnttab_cache_lock);
 895                         return (error);
 896                 }
 897         }
 898
 899         find.mtn_mt.mnt_special = (char *)fsname;
 900         mtn = avl_find(&hdl->libzfs_mnttab_cache, &find, NULL);
 901         if (mtn) {
 902                 *entry = mtn->mtn_mt;
 903                 ret = 0;
 904         }
 905         pthread_mutex_unlock(&hdl->libzfs_mnttab_cache_lock);
 906         return (ret);
 907 }
 908
 909 void
 910 libzfs_mnttab_add(libzfs_handle_t *hdl, const char *special,
 911     const char *mountp, const char *mntopts)
 912 {
 913         mnttab_node_t *mtn;
 914
 915         pthread_mutex_lock(&hdl->libzfs_mnttab_cache_lock);
 916         if (avl_numnodes(&hdl->libzfs_mnttab_cache) != 0) {
 917                 mtn = zfs_alloc(hdl, sizeof (mnttab_node_t));
 918                 mtn->mtn_mt.mnt_special = zfs_strdup(hdl, special);
 919                 mtn->mtn_mt.mnt_mountp = zfs_strdup(hdl, mountp);
 920                 mtn->mtn_mt.mnt_fstype = zfs_strdup(hdl, MNTTYPE_ZFS);
 921                 mtn->mtn_mt.mnt_mntopts = zfs_strdup(hdl, mntopts);
 922                 /*
 923                  * Another thread may have already added this entry
 924                  * via libzfs_mnttab_update. If so we should skip it.
 925                  */
 926                 if (avl_find(&hdl->libzfs_mnttab_cache, mtn, NULL) != NULL)
 927                         free(mtn);
 928                 else
 929                         avl_add(&hdl->libzfs_mnttab_cache, mtn);
 930         }
 931         pthread_mutex_unlock(&hdl->libzfs_mnttab_cache_lock);
 932 }
 933
 934 void
 935 libzfs_mnttab_remove(libzfs_handle_t *hdl, const char *fsname)
 936 {
 937         mnttab_node_t find;
 938         mnttab_node_t *ret;
 939
 940         pthread_mutex_lock(&hdl->libzfs_mnttab_cache_lock);
 941         find.mtn_mt.mnt_special = (char *)fsname;
 942         if ((ret = avl_find(&hdl->libzfs_mnttab_cache, (void *)&find, NULL))
 943             != NULL) {
 944                 avl_remove(&hdl->libzfs_mnttab_cache, ret);
 945                 free(ret->mtn_mt.mnt_special);
 946                 free(ret->mtn_mt.mnt_mountp);
 947                 free(ret->mtn_mt.mnt_fstype);
 948                 free(ret->mtn_mt.mnt_mntopts);
 949                 free(ret);
 950         }
 951         pthread_mutex_unlock(&hdl->libzfs_mnttab_cache_lock);
 952 }
 953
 954 int
 955 zfs_spa_version(zfs_handle_t *zhp, int *spa_version)
 956 {
 957         zpool_handle_t *zpool_handle = zhp->zpool_hdl;
 958
 959         if (zpool_handle == NULL)
 960                 return (-1);
 961
 962         *spa_version = zpool_get_prop_int(zpool_handle,
 963             ZPOOL_PROP_VERSION, NULL);
 964         return (0);
 965 }
 966
 967 /*
 968  * The choice of reservation property depends on the SPA version.
 969  */
 970 static int
 971 zfs_which_resv_prop(zfs_handle_t *zhp, zfs_prop_t *resv_prop)
 972 {
 973         int spa_version;
 974
 975         if (zfs_spa_version(zhp, &spa_version) < 0)
 976                 return (-1);
 977
 978         if (spa_version >= SPA_VERSION_REFRESERVATION)
 979                 *resv_prop = ZFS_PROP_REFRESERVATION;
 980         else
 981                 *resv_prop = ZFS_PROP_RESERVATION;
 982
 983         return (0);
 984 }
 985
 986 /*
 987  * Given an nvlist of properties to set, validates that they are correct, and
 988  * parses any numeric properties (index, boolean, etc) if they are specified as
 989  * strings.
 990  */
 991 nvlist_t *
 992 zfs_valid_proplist(libzfs_handle_t *hdl, zfs_type_t type, nvlist_t *nvl,
 993     uint64_t zoned, zfs_handle_t *zhp, zpool_handle_t *zpool_hdl,
 994     boolean_t key_params_ok, const char *errbuf)
 995 {
 996         nvpair_t *elem;
 997         uint64_t intval;
 998         char *strval;
 999         zfs_prop_t prop;
1000         nvlist_t *ret;
1001         int chosen_normal = -1;
1002         int chosen_utf = -1;
1003
1004         if (nvlist_alloc(&ret, NV_UNIQUE_NAME, 0) != 0) {
1005                 (void) no_memory(hdl);
1006                 return (NULL);
1007         }
1008
1009         /*
1010          * Make sure this property is valid and applies to this type.
1011          */
1012
1013         elem = NULL;
1014         while ((elem = nvlist_next_nvpair(nvl, elem)) != NULL) {
1015                 const char *propname = nvpair_name(elem);
1016
1017                 prop = zfs_name_to_prop(propname);
1018                 if (prop == ZPROP_INVAL && zfs_prop_user(propname)) {
1019                         /*
1020                          * This is a user property: make sure it's a
1021                          * string, and that it's less than ZAP_MAXNAMELEN.
1022                          */
1023                         if (nvpair_type(elem) != DATA_TYPE_STRING) {
1024                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1025                                     "'%s' must be a string"), propname);
1026                                 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1027                                 goto error;
1028                         }
1029
1030                         if (strlen(nvpair_name(elem)) >= ZAP_MAXNAMELEN) {
1031                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1032                                     "property name '%s' is too long"),
1033                                     propname);
1034                                 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1035                                 goto error;
1036                         }
1037
1038                         (void) nvpair_value_string(elem, &strval);
1039                         if (nvlist_add_string(ret, propname, strval) != 0) {
1040                                 (void) no_memory(hdl);
1041                                 goto error;
1042                         }
1043                         continue;
1044                 }
1045
1046                 /*
1047                  * Currently, only user properties can be modified on
1048                  * snapshots.
1049                  */
1050                 if (type == ZFS_TYPE_SNAPSHOT) {
1051                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1052                             "this property can not be modified for snapshots"));
1053                         (void) zfs_error(hdl, EZFS_PROPTYPE, errbuf);
1054                         goto error;
1055                 }
1056
1057                 if (prop == ZPROP_INVAL && zfs_prop_userquota(propname)) {
1058                         zfs_userquota_prop_t uqtype;
1059                         char *newpropname = NULL;
1060                         char domain[128];
1061                         uint64_t rid;
1062                         uint64_t valary[3];
1063                         int rc;
1064
1065                         if (userquota_propname_decode(propname, zoned,
1066                             &uqtype, domain, sizeof (domain), &rid) != 0) {
1067                                 zfs_error_aux(hdl,
1068                                     dgettext(TEXT_DOMAIN,
1069                                     "'%s' has an invalid user/group name"),
1070                                     propname);
1071                                 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1072                                 goto error;
1073                         }
1074
1075                         if (uqtype != ZFS_PROP_USERQUOTA &&
1076                             uqtype != ZFS_PROP_GROUPQUOTA &&
1077                             uqtype != ZFS_PROP_USEROBJQUOTA &&
1078                             uqtype != ZFS_PROP_GROUPOBJQUOTA &&
1079                             uqtype != ZFS_PROP_PROJECTQUOTA &&
1080                             uqtype != ZFS_PROP_PROJECTOBJQUOTA) {
1081                                 zfs_error_aux(hdl,
1082                                     dgettext(TEXT_DOMAIN, "'%s' is readonly"),
1083                                     propname);
1084                                 (void) zfs_error(hdl, EZFS_PROPREADONLY,
1085                                     errbuf);
1086                                 goto error;
1087                         }
1088
1089                         if (nvpair_type(elem) == DATA_TYPE_STRING) {
1090                                 (void) nvpair_value_string(elem, &strval);
1091                                 if (strcmp(strval, "none") == 0) {
1092                                         intval = 0;
1093                                 } else if (zfs_nicestrtonum(hdl,
1094                                     strval, &intval) != 0) {
1095                                         (void) zfs_error(hdl,
1096                                             EZFS_BADPROP, errbuf);
1097                                         goto error;
1098                                 }
1099                         } else if (nvpair_type(elem) ==
1100                             DATA_TYPE_UINT64) {
1101                                 (void) nvpair_value_uint64(elem, &intval);
1102                                 if (intval == 0) {
1103                                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1104                                             "use 'none' to disable "
1105                                             "{user|group|project}quota"));
1106                                         goto error;
1107                                 }
1108                         } else {
1109                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1110                                     "'%s' must be a number"), propname);
1111                                 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1112                                 goto error;
1113                         }
1114
1115                         /*
1116                          * Encode the prop name as
1117                          * userquota@<hex-rid>-domain, to make it easy
1118                          * for the kernel to decode.
1119                          */
1120                         rc = asprintf(&newpropname, "%s%llx-%s",
1121                             zfs_userquota_prop_prefixes[uqtype],
1122                             (longlong_t)rid, domain);
1123                         if (rc == -1 || newpropname == NULL) {
1124                                 (void) no_memory(hdl);
1125                                 goto error;
1126                         }
1127
1128                         valary[0] = uqtype;
1129                         valary[1] = rid;
1130                         valary[2] = intval;
1131                         if (nvlist_add_uint64_array(ret, newpropname,
1132                             valary, 3) != 0) {
1133                                 free(newpropname);
1134                                 (void) no_memory(hdl);
1135                                 goto error;
1136                         }
1137                         free(newpropname);
1138                         continue;
1139                 } else if (prop == ZPROP_INVAL && zfs_prop_written(propname)) {
1140                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1141                             "'%s' is readonly"),
1142                             propname);
1143                         (void) zfs_error(hdl, EZFS_PROPREADONLY, errbuf);
1144                         goto error;
1145                 }
1146
1147                 if (prop == ZPROP_INVAL) {
1148                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1149                             "invalid property '%s'"), propname);
1150                         (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1151                         goto error;
1152                 }
1153
1154                 if (!zfs_prop_valid_for_type(prop, type, B_FALSE)) {
1155                         zfs_error_aux(hdl,
1156                             dgettext(TEXT_DOMAIN, "'%s' does not "
1157                             "apply to datasets of this type"), propname);
1158                         (void) zfs_error(hdl, EZFS_PROPTYPE, errbuf);
1159                         goto error;
1160                 }
1161
1162                 if (zfs_prop_readonly(prop) &&
1163                     !(zfs_prop_setonce(prop) && zhp == NULL) &&
1164                     !(zfs_prop_encryption_key_param(prop) && key_params_ok)) {
1165                         zfs_error_aux(hdl,
1166                             dgettext(TEXT_DOMAIN, "'%s' is readonly"),
1167                             propname);
1168                         (void) zfs_error(hdl, EZFS_PROPREADONLY, errbuf);
1169                         goto error;
1170                 }
1171
1172                 if (zprop_parse_value(hdl, elem, prop, type, ret,
1173                     &strval, &intval, errbuf) != 0)
1174                         goto error;
1175
1176                 /*
1177                  * Perform some additional checks for specific properties.
1178                  */
1179                 switch (prop) {
1180                 case ZFS_PROP_VERSION:
1181                 {
1182                         int version;
1183
1184                         if (zhp == NULL)
1185                                 break;
1186                         version = zfs_prop_get_int(zhp, ZFS_PROP_VERSION);
1187                         if (intval < version) {
1188                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1189                                     "Can not downgrade; already at version %u"),
1190                                     version);
1191                                 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1192                                 goto error;
1193                         }
1194                         break;
1195                 }
1196
1197                 case ZFS_PROP_VOLBLOCKSIZE:
1198                 case ZFS_PROP_RECORDSIZE:
1199                 {
1200                         int maxbs = SPA_MAXBLOCKSIZE;
1201                         char buf[64];
1202
1203                         if (zpool_hdl != NULL) {
1204                                 maxbs = zpool_get_prop_int(zpool_hdl,
1205                                     ZPOOL_PROP_MAXBLOCKSIZE, NULL);
1206                         }
1207                         /*
1208                          * The value must be a power of two between
1209                          * SPA_MINBLOCKSIZE and maxbs.
1210                          */
1211                         if (intval < SPA_MINBLOCKSIZE ||
1212                             intval > maxbs || !ISP2(intval)) {
1213                                 zfs_nicebytes(maxbs, buf, sizeof (buf));
1214                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1215                                     "'%s' must be power of 2 from 512B "
1216                                     "to %s"), propname, buf);
1217                                 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1218                                 goto error;
1219                         }
1220                         break;
1221                 }
1222
1223                 case ZFS_PROP_SPECIAL_SMALL_BLOCKS:
1224                         if (zpool_hdl != NULL) {
1225                                 char state[64] = "";
1226
1227                                 /*
1228                                  * Issue a warning but do not fail so that
1229                                  * tests for setable properties succeed.
1230                                  */
1231                                 if (zpool_prop_get_feature(zpool_hdl,
1232                                     "feature@allocation_classes", state,
1233                                     sizeof (state)) != 0 ||
1234                                     strcmp(state, ZFS_FEATURE_ACTIVE) != 0) {
1235                                         (void) fprintf(stderr, gettext(
1236                                             "%s: property requires a special "
1237                                             "device in the pool\n"), propname);
1238                                 }
1239                         }
1240                         if (intval != 0 &&
1241                             (intval < SPA_MINBLOCKSIZE ||
1242                             intval > SPA_OLD_MAXBLOCKSIZE || !ISP2(intval))) {
1243                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1244                                     "invalid '%s=%d' property: must be zero or "
1245                                     "a power of 2 from 512B to 128K"), propname,
1246                                     intval);
1247                                 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1248                                 goto error;
1249                         }
1250                         break;
1251
1252                 case ZFS_PROP_MLSLABEL:
1253                 {
1254 #ifdef HAVE_MLSLABEL
1255                         /*
1256                          * Verify the mlslabel string and convert to
1257                          * internal hex label string.
1258                          */
1259
1260                         m_label_t *new_sl;
1261                         char *hex = NULL;       /* internal label string */
1262
1263                         /* Default value is already OK. */
1264                         if (strcasecmp(strval, ZFS_MLSLABEL_DEFAULT) == 0)
1265                                 break;
1266
1267                         /* Verify the label can be converted to binary form */
1268                         if (((new_sl = m_label_alloc(MAC_LABEL)) == NULL) ||
1269                             (str_to_label(strval, &new_sl, MAC_LABEL,
1270                             L_NO_CORRECTION, NULL) == -1)) {
1271                                 goto badlabel;
1272                         }
1273
1274                         /* Now translate to hex internal label string */
1275                         if (label_to_str(new_sl, &hex, M_INTERNAL,
1276                             DEF_NAMES) != 0) {
1277                                 if (hex)
1278                                         free(hex);
1279                                 goto badlabel;
1280                         }
1281                         m_label_free(new_sl);
1282
1283                         /* If string is already in internal form, we're done. */
1284                         if (strcmp(strval, hex) == 0) {
1285                                 free(hex);
1286                                 break;
1287                         }
1288
1289                         /* Replace the label string with the internal form. */
1290                         (void) nvlist_remove(ret, zfs_prop_to_name(prop),
1291                             DATA_TYPE_STRING);
1292                         verify(nvlist_add_string(ret, zfs_prop_to_name(prop),
1293                             hex) == 0);
1294                         free(hex);
1295
1296                         break;
1297
1298 badlabel:
1299                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1300                             "invalid mlslabel '%s'"), strval);
1301                         (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1302                         m_label_free(new_sl);   /* OK if null */
1303                         goto error;
1304 #else
1305                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1306                             "mlslabels are unsupported"));
1307                         (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1308                         goto error;
1309 #endif /* HAVE_MLSLABEL */
1310                 }
1311
1312                 case ZFS_PROP_MOUNTPOINT:
1313                 {
1314                         namecheck_err_t why;
1315
1316                         if (strcmp(strval, ZFS_MOUNTPOINT_NONE) == 0 ||
1317                             strcmp(strval, ZFS_MOUNTPOINT_LEGACY) == 0)
1318                                 break;
1319
1320                         if (mountpoint_namecheck(strval, &why)) {
1321                                 switch (why) {
1322                                 case NAME_ERR_LEADING_SLASH:
1323                                         zfs_error_aux(hdl,
1324                                             dgettext(TEXT_DOMAIN,
1325                                             "'%s' must be an absolute path, "
1326                                             "'none', or 'legacy'"), propname);
1327                                         break;
1328                                 case NAME_ERR_TOOLONG:
1329                                         zfs_error_aux(hdl,
1330                                             dgettext(TEXT_DOMAIN,
1331                                             "component of '%s' is too long"),
1332                                             propname);
1333                                         break;
1334
1335                                 default:
1336                                         zfs_error_aux(hdl,
1337                                             dgettext(TEXT_DOMAIN,
1338                                             "(%d) not defined"),
1339                                             why);
1340                                         break;
1341                                 }
1342                                 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1343                                 goto error;
1344                         }
1345                 }
1346
1347                         /*FALLTHRU*/
1348
1349                 case ZFS_PROP_SHARESMB:
1350                 case ZFS_PROP_SHARENFS:
1351                         /*
1352                          * For the mountpoint and sharenfs or sharesmb
1353                          * properties, check if it can be set in a
1354                          * global/non-global zone based on
1355                          * the zoned property value:
1356                          *
1357                          *              global zone         non-global zone
1358                          * --------------------------------------------------
1359                          * zoned=on     mountpoint (no)     mountpoint (yes)
1360                          *              sharenfs (no)       sharenfs (no)
1361                          *              sharesmb (no)       sharesmb (no)
1362                          *
1363                          * zoned=off    mountpoint (yes)        N/A
1364                          *              sharenfs (yes)
1365                          *              sharesmb (yes)
1366                          */
1367                         if (zoned) {
1368                                 if (getzoneid() == GLOBAL_ZONEID) {
1369                                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1370                                             "'%s' cannot be set on "
1371                                             "dataset in a non-global zone"),
1372                                             propname);
1373                                         (void) zfs_error(hdl, EZFS_ZONED,
1374                                             errbuf);
1375                                         goto error;
1376                                 } else if (prop == ZFS_PROP_SHARENFS ||
1377                                     prop == ZFS_PROP_SHARESMB) {
1378                                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1379                                             "'%s' cannot be set in "
1380                                             "a non-global zone"), propname);
1381                                         (void) zfs_error(hdl, EZFS_ZONED,
1382                                             errbuf);
1383                                         goto error;
1384                                 }
1385                         } else if (getzoneid() != GLOBAL_ZONEID) {
1386                                 /*
1387                                  * If zoned property is 'off', this must be in
1388                                  * a global zone. If not, something is wrong.
1389                                  */
1390                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1391                                     "'%s' cannot be set while dataset "
1392                                     "'zoned' property is set"), propname);
1393                                 (void) zfs_error(hdl, EZFS_ZONED, errbuf);
1394                                 goto error;
1395                         }
1396
1397                         /*
1398                          * At this point, it is legitimate to set the
1399                          * property. Now we want to make sure that the
1400                          * property value is valid if it is sharenfs.
1401                          */
1402                         if ((prop == ZFS_PROP_SHARENFS ||
1403                             prop == ZFS_PROP_SHARESMB) &&
1404                             strcmp(strval, "on") != 0 &&
1405                             strcmp(strval, "off") != 0) {
1406                                 zfs_share_proto_t proto;
1407
1408                                 if (prop == ZFS_PROP_SHARESMB)
1409                                         proto = PROTO_SMB;
1410                                 else
1411                                         proto = PROTO_NFS;
1412
1413                                 /*
1414                                  * Must be an valid sharing protocol
1415                                  * option string so init the libshare
1416                                  * in order to enable the parser and
1417                                  * then parse the options. We use the
1418                                  * control API since we don't care about
1419                                  * the current configuration and don't
1420                                  * want the overhead of loading it
1421                                  * until we actually do something.
1422                                  */
1423
1424                                 if (zfs_init_libshare(hdl,
1425                                     SA_INIT_CONTROL_API) != SA_OK) {
1426                                         /*
1427                                          * An error occurred so we can't do
1428                                          * anything
1429                                          */
1430                                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1431                                             "'%s' cannot be set: problem "
1432                                             "in share initialization"),
1433                                             propname);
1434                                         (void) zfs_error(hdl, EZFS_BADPROP,
1435                                             errbuf);
1436                                         goto error;
1437                                 }
1438
1439                                 if (zfs_parse_options(strval, proto) != SA_OK) {
1440                                         /*
1441                                          * There was an error in parsing so
1442                                          * deal with it by issuing an error
1443                                          * message and leaving after
1444                                          * uninitializing the the libshare
1445                                          * interface.
1446                                          */
1447                                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1448                                             "'%s' cannot be set to invalid "
1449                                             "options"), propname);
1450                                         (void) zfs_error(hdl, EZFS_BADPROP,
1451                                             errbuf);
1452                                         zfs_uninit_libshare(hdl);
1453                                         goto error;
1454                                 }
1455                                 zfs_uninit_libshare(hdl);
1456                         }
1457
1458                         break;
1459
1460                 case ZFS_PROP_KEYLOCATION:
1461                         if (!zfs_prop_valid_keylocation(strval, B_FALSE)) {
1462                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1463                                     "invalid keylocation"));
1464                                 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1465                                 goto error;
1466                         }
1467
1468                         if (zhp != NULL) {
1469                                 uint64_t crypt =
1470                                     zfs_prop_get_int(zhp, ZFS_PROP_ENCRYPTION);
1471
1472                                 if (crypt == ZIO_CRYPT_OFF &&
1473                                     strcmp(strval, "none") != 0) {
1474                                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1475                                             "keylocation must be 'none' "
1476                                             "for unencrypted datasets"));
1477                                         (void) zfs_error(hdl, EZFS_BADPROP,
1478                                             errbuf);
1479                                         goto error;
1480                                 } else if (crypt != ZIO_CRYPT_OFF &&
1481                                     strcmp(strval, "none") == 0) {
1482                                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1483                                             "keylocation must not be 'none' "
1484                                             "for encrypted datasets"));
1485                                         (void) zfs_error(hdl, EZFS_BADPROP,
1486                                             errbuf);
1487                                         goto error;
1488                                 }
1489                         }
1490                         break;
1491
1492                 case ZFS_PROP_PBKDF2_ITERS:
1493                         if (intval < MIN_PBKDF2_ITERATIONS) {
1494                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1495                                     "minimum pbkdf2 iterations is %u"),
1496                                     MIN_PBKDF2_ITERATIONS);
1497                                 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1498                                 goto error;
1499                         }
1500                         break;
1501
1502                 case ZFS_PROP_UTF8ONLY:
1503                         chosen_utf = (int)intval;
1504                         break;
1505
1506                 case ZFS_PROP_NORMALIZE:
1507                         chosen_normal = (int)intval;
1508                         break;
1509
1510                 default:
1511                         break;
1512                 }
1513
1514                 /*
1515                  * For changes to existing volumes, we have some additional
1516                  * checks to enforce.
1517                  */
1518                 if (type == ZFS_TYPE_VOLUME && zhp != NULL) {
1519                         uint64_t blocksize = zfs_prop_get_int(zhp,
1520                             ZFS_PROP_VOLBLOCKSIZE);
1521                         char buf[64];
1522
1523                         switch (prop) {
1524                         case ZFS_PROP_VOLSIZE:
1525                                 if (intval % blocksize != 0) {
1526                                         zfs_nicebytes(blocksize, buf,
1527                                             sizeof (buf));
1528                                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1529                                             "'%s' must be a multiple of "
1530                                             "volume block size (%s)"),
1531                                             propname, buf);
1532                                         (void) zfs_error(hdl, EZFS_BADPROP,
1533                                             errbuf);
1534                                         goto error;
1535                                 }
1536
1537                                 if (intval == 0) {
1538                                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1539                                             "'%s' cannot be zero"),
1540                                             propname);
1541                                         (void) zfs_error(hdl, EZFS_BADPROP,
1542                                             errbuf);
1543                                         goto error;
1544                                 }
1545                                 break;
1546
1547                         default:
1548                                 break;
1549                         }
1550                 }
1551
1552                 /* check encryption properties */
1553                 if (zhp != NULL) {
1554                         int64_t crypt = zfs_prop_get_int(zhp,
1555                             ZFS_PROP_ENCRYPTION);
1556
1557                         switch (prop) {
1558                         case ZFS_PROP_COPIES:
1559                                 if (crypt != ZIO_CRYPT_OFF && intval > 2) {
1560                                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1561                                             "encrypted datasets cannot have "
1562                                             "3 copies"));
1563                                         (void) zfs_error(hdl, EZFS_BADPROP,
1564                                             errbuf);
1565                                         goto error;
1566                                 }
1567                                 break;
1568                         default:
1569                                 break;
1570                         }
1571                 }
1572         }
1573
1574         /*
1575          * If normalization was chosen, but no UTF8 choice was made,
1576          * enforce rejection of non-UTF8 names.
1577          *
1578          * If normalization was chosen, but rejecting non-UTF8 names
1579          * was explicitly not chosen, it is an error.
1580          */
1581         if (chosen_normal > 0 && chosen_utf < 0) {
1582                 if (nvlist_add_uint64(ret,
1583                     zfs_prop_to_name(ZFS_PROP_UTF8ONLY), 1) != 0) {
1584                         (void) no_memory(hdl);
1585                         goto error;
1586                 }
1587         } else if (chosen_normal > 0 && chosen_utf == 0) {
1588                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1589                     "'%s' must be set 'on' if normalization chosen"),
1590                     zfs_prop_to_name(ZFS_PROP_UTF8ONLY));
1591                 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1592                 goto error;
1593         }
1594         return (ret);
1595
1596 error:
1597         nvlist_free(ret);
1598         return (NULL);
1599 }
1600
1601 int
1602 zfs_add_synthetic_resv(zfs_handle_t *zhp, nvlist_t *nvl)
1603 {
1604         uint64_t old_volsize;
1605         uint64_t new_volsize;
1606         uint64_t old_reservation;
1607         uint64_t new_reservation;
1608         zfs_prop_t resv_prop;
1609         nvlist_t *props;
1610
1611         /*
1612          * If this is an existing volume, and someone is setting the volsize,
1613          * make sure that it matches the reservation, or add it if necessary.
1614          */
1615         old_volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE);
1616         if (zfs_which_resv_prop(zhp, &resv_prop) < 0)
1617                 return (-1);
1618         old_reservation = zfs_prop_get_int(zhp, resv_prop);
1619
1620         props = fnvlist_alloc();
1621         fnvlist_add_uint64(props, zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE),
1622             zfs_prop_get_int(zhp, ZFS_PROP_VOLBLOCKSIZE));
1623
1624         if ((zvol_volsize_to_reservation(old_volsize, props) !=
1625             old_reservation) || nvlist_exists(nvl,
1626             zfs_prop_to_name(resv_prop))) {
1627                 fnvlist_free(props);
1628                 return (0);
1629         }
1630         if (nvlist_lookup_uint64(nvl, zfs_prop_to_name(ZFS_PROP_VOLSIZE),
1631             &new_volsize) != 0) {
1632                 fnvlist_free(props);
1633                 return (-1);
1634         }
1635         new_reservation = zvol_volsize_to_reservation(new_volsize, props);
1636         fnvlist_free(props);
1637
1638         if (nvlist_add_uint64(nvl, zfs_prop_to_name(resv_prop),
1639             new_reservation) != 0) {
1640                 (void) no_memory(zhp->zfs_hdl);
1641                 return (-1);
1642         }
1643         return (1);
1644 }
1645
1646 /*
1647  * Helper for 'zfs {set|clone} refreservation=auto'.  Must be called after
1648  * zfs_valid_proplist(), as it is what sets the UINT64_MAX sentinal value.
1649  * Return codes must match zfs_add_synthetic_resv().
1650  */
1651 static int
1652 zfs_fix_auto_resv(zfs_handle_t *zhp, nvlist_t *nvl)
1653 {
1654         uint64_t volsize;
1655         uint64_t resvsize;
1656         zfs_prop_t prop;
1657         nvlist_t *props;
1658
1659         if (!ZFS_IS_VOLUME(zhp)) {
1660                 return (0);
1661         }
1662
1663         if (zfs_which_resv_prop(zhp, &prop) != 0) {
1664                 return (-1);
1665         }
1666
1667         if (prop != ZFS_PROP_REFRESERVATION) {
1668                 return (0);
1669         }
1670
1671         if (nvlist_lookup_uint64(nvl, zfs_prop_to_name(prop), &resvsize) != 0) {
1672                 /* No value being set, so it can't be "auto" */
1673                 return (0);
1674         }
1675         if (resvsize != UINT64_MAX) {
1676                 /* Being set to a value other than "auto" */
1677                 return (0);
1678         }
1679
1680         props = fnvlist_alloc();
1681
1682         fnvlist_add_uint64(props, zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE),
1683             zfs_prop_get_int(zhp, ZFS_PROP_VOLBLOCKSIZE));
1684
1685         if (nvlist_lookup_uint64(nvl, zfs_prop_to_name(ZFS_PROP_VOLSIZE),
1686             &volsize) != 0) {
1687                 volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE);
1688         }
1689
1690         resvsize = zvol_volsize_to_reservation(volsize, props);
1691         fnvlist_free(props);
1692
1693         (void) nvlist_remove_all(nvl, zfs_prop_to_name(prop));
1694         if (nvlist_add_uint64(nvl, zfs_prop_to_name(prop), resvsize) != 0) {
1695                 (void) no_memory(zhp->zfs_hdl);
1696                 return (-1);
1697         }
1698         return (1);
1699 }
1700
1701 void
1702 zfs_setprop_error(libzfs_handle_t *hdl, zfs_prop_t prop, int err,
1703     char *errbuf)
1704 {
1705         switch (err) {
1706
1707         case ENOSPC:
1708                 /*
1709                  * For quotas and reservations, ENOSPC indicates
1710                  * something different; setting a quota or reservation
1711                  * doesn't use any disk space.
1712                  */
1713                 switch (prop) {
1714                 case ZFS_PROP_QUOTA:
1715                 case ZFS_PROP_REFQUOTA:
1716                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1717                             "size is less than current used or "
1718                             "reserved space"));
1719                         (void) zfs_error(hdl, EZFS_PROPSPACE, errbuf);
1720                         break;
1721
1722                 case ZFS_PROP_RESERVATION:
1723                 case ZFS_PROP_REFRESERVATION:
1724                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1725                             "size is greater than available space"));
1726                         (void) zfs_error(hdl, EZFS_PROPSPACE, errbuf);
1727                         break;
1728
1729                 default:
1730                         (void) zfs_standard_error(hdl, err, errbuf);
1731                         break;
1732                 }
1733                 break;
1734
1735         case EBUSY:
1736                 (void) zfs_standard_error(hdl, EBUSY, errbuf);
1737                 break;
1738
1739         case EROFS:
1740                 (void) zfs_error(hdl, EZFS_DSREADONLY, errbuf);
1741                 break;
1742
1743         case E2BIG:
1744                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1745                     "property value too long"));
1746                 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1747                 break;
1748
1749         case ENOTSUP:
1750                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1751                     "pool and or dataset must be upgraded to set this "
1752                     "property or value"));
1753                 (void) zfs_error(hdl, EZFS_BADVERSION, errbuf);
1754                 break;
1755
1756         case ERANGE:
1757                 if (prop == ZFS_PROP_COMPRESSION ||
1758                     prop == ZFS_PROP_DNODESIZE ||
1759                     prop == ZFS_PROP_RECORDSIZE) {
1760                         (void) zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1761                             "property setting is not allowed on "
1762                             "bootable datasets"));
1763                         (void) zfs_error(hdl, EZFS_NOTSUP, errbuf);
1764                 } else if (prop == ZFS_PROP_CHECKSUM ||
1765                     prop == ZFS_PROP_DEDUP) {
1766                         (void) zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1767                             "property setting is not allowed on "
1768                             "root pools"));
1769                         (void) zfs_error(hdl, EZFS_NOTSUP, errbuf);
1770                 } else {
1771                         (void) zfs_standard_error(hdl, err, errbuf);
1772                 }
1773                 break;
1774
1775         case EINVAL:
1776                 if (prop == ZPROP_INVAL) {
1777                         (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1778                 } else {
1779                         (void) zfs_standard_error(hdl, err, errbuf);
1780                 }
1781                 break;
1782
1783         case EACCES:
1784                 if (prop == ZFS_PROP_KEYLOCATION) {
1785                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1786                             "keylocation may only be set on encryption roots"));
1787                         (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1788                 } else {
1789                         (void) zfs_standard_error(hdl, err, errbuf);
1790                 }
1791                 break;
1792
1793         case EOVERFLOW:
1794                 /*
1795                  * This platform can't address a volume this big.
1796                  */
1797 #ifdef _ILP32
1798                 if (prop == ZFS_PROP_VOLSIZE) {
1799                         (void) zfs_error(hdl, EZFS_VOLTOOBIG, errbuf);
1800                         break;
1801                 }
1802 #endif
1803                 /* FALLTHROUGH */
1804         default:
1805                 (void) zfs_standard_error(hdl, err, errbuf);
1806         }
1807 }
1808
1809 static boolean_t
1810 zfs_is_namespace_prop(zfs_prop_t prop)
1811 {
1812         switch (prop) {
1813
1814         case ZFS_PROP_ATIME:
1815         case ZFS_PROP_RELATIME:
1816         case ZFS_PROP_DEVICES:
1817         case ZFS_PROP_EXEC:
1818         case ZFS_PROP_SETUID:
1819         case ZFS_PROP_READONLY:
1820         case ZFS_PROP_XATTR:
1821         case ZFS_PROP_NBMAND:
1822                 return (B_TRUE);
1823
1824         default:
1825                 return (B_FALSE);
1826         }
1827 }
1828
1829 /*
1830  * Given a property name and value, set the property for the given dataset.
1831  */
1832 int
1833 zfs_prop_set(zfs_handle_t *zhp, const char *propname, const char *propval)
1834 {
1835         int ret = -1;
1836         char errbuf[1024];
1837         libzfs_handle_t *hdl = zhp->zfs_hdl;
1838         nvlist_t *nvl = NULL;
1839
1840         (void) snprintf(errbuf, sizeof (errbuf),
1841             dgettext(TEXT_DOMAIN, "cannot set property for '%s'"),
1842             zhp->zfs_name);
1843
1844         if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0) != 0 ||
1845             nvlist_add_string(nvl, propname, propval) != 0) {
1846                 (void) no_memory(hdl);
1847                 goto error;
1848         }
1849
1850         ret = zfs_prop_set_list(zhp, nvl);
1851
1852 error:
1853         nvlist_free(nvl);
1854         return (ret);
1855 }
1856
1857
1858
1859 /*
1860  * Given an nvlist of property names and values, set the properties for the
1861  * given dataset.
1862  */
1863 int
1864 zfs_prop_set_list(zfs_handle_t *zhp, nvlist_t *props)
1865 {
1866         zfs_cmd_t zc = {"\0"};
1867         int ret = -1;
1868         prop_changelist_t **cls = NULL;
1869         int cl_idx;
1870         char errbuf[1024];
1871         libzfs_handle_t *hdl = zhp->zfs_hdl;
1872         nvlist_t *nvl;
1873         int nvl_len = 0;
1874         int added_resv = 0;
1875         zfs_prop_t prop = 0;
1876         nvpair_t *elem;
1877
1878         (void) snprintf(errbuf, sizeof (errbuf),
1879             dgettext(TEXT_DOMAIN, "cannot set property for '%s'"),
1880             zhp->zfs_name);
1881
1882         if ((nvl = zfs_valid_proplist(hdl, zhp->zfs_type, props,
1883             zfs_prop_get_int(zhp, ZFS_PROP_ZONED), zhp, zhp->zpool_hdl,
1884             B_FALSE, errbuf)) == NULL)
1885                 goto error;
1886
1887         /*
1888          * We have to check for any extra properties which need to be added
1889          * before computing the length of the nvlist.
1890          */
1891         for (elem = nvlist_next_nvpair(nvl, NULL);
1892             elem != NULL;
1893             elem = nvlist_next_nvpair(nvl, elem)) {
1894                 if (zfs_name_to_prop(nvpair_name(elem)) == ZFS_PROP_VOLSIZE &&
1895                     (added_resv = zfs_add_synthetic_resv(zhp, nvl)) == -1) {
1896                         goto error;
1897                 }
1898         }
1899
1900         if (added_resv != 1 &&
1901             (added_resv = zfs_fix_auto_resv(zhp, nvl)) == -1) {
1902                 goto error;
1903         }
1904
1905         /*
1906          * Check how many properties we're setting and allocate an array to
1907          * store changelist pointers for postfix().
1908          */
1909         for (elem = nvlist_next_nvpair(nvl, NULL);
1910             elem != NULL;
1911             elem = nvlist_next_nvpair(nvl, elem))
1912                 nvl_len++;
1913         if ((cls = calloc(nvl_len, sizeof (prop_changelist_t *))) == NULL)
1914                 goto error;
1915
1916         cl_idx = 0;
1917         for (elem = nvlist_next_nvpair(nvl, NULL);
1918             elem != NULL;
1919             elem = nvlist_next_nvpair(nvl, elem)) {
1920
1921                 prop = zfs_name_to_prop(nvpair_name(elem));
1922
1923                 assert(cl_idx < nvl_len);
1924                 /*
1925                  * We don't want to unmount & remount the dataset when changing
1926                  * its canmount property to 'on' or 'noauto'.  We only use
1927                  * the changelist logic to unmount when setting canmount=off.
1928                  */
1929                 if (prop != ZFS_PROP_CANMOUNT ||
1930                     (fnvpair_value_uint64(elem) == ZFS_CANMOUNT_OFF &&
1931                     zfs_is_mounted(zhp, NULL))) {
1932                         cls[cl_idx] = changelist_gather(zhp, prop, 0, 0);
1933                         if (cls[cl_idx] == NULL)
1934                                 goto error;
1935                 }
1936
1937                 if (prop == ZFS_PROP_MOUNTPOINT &&
1938                     changelist_haszonedchild(cls[cl_idx])) {
1939                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1940                             "child dataset with inherited mountpoint is used "
1941                             "in a non-global zone"));
1942                         ret = zfs_error(hdl, EZFS_ZONED, errbuf);
1943                         goto error;
1944                 }
1945
1946                 if (cls[cl_idx] != NULL &&
1947                     (ret = changelist_prefix(cls[cl_idx])) != 0)
1948                         goto error;
1949
1950                 cl_idx++;
1951         }
1952         assert(cl_idx == nvl_len);
1953
1954         /*
1955          * Execute the corresponding ioctl() to set this list of properties.
1956          */
1957         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
1958
1959         if ((ret = zcmd_write_src_nvlist(hdl, &zc, nvl)) != 0 ||
1960             (ret = zcmd_alloc_dst_nvlist(hdl, &zc, 0)) != 0)
1961                 goto error;
1962
1963         ret = zfs_ioctl(hdl, ZFS_IOC_SET_PROP, &zc);
1964
1965         if (ret != 0) {
1966                 if (zc.zc_nvlist_dst_filled == B_FALSE) {
1967                         (void) zfs_standard_error(hdl, errno, errbuf);
1968                         goto error;
1969                 }
1970
1971                 /* Get the list of unset properties back and report them. */
1972                 nvlist_t *errorprops = NULL;
1973                 if (zcmd_read_dst_nvlist(hdl, &zc, &errorprops) != 0)
1974                         goto error;
1975                 for (nvpair_t *elem = nvlist_next_nvpair(errorprops, NULL);
1976                     elem != NULL;
1977                     elem = nvlist_next_nvpair(errorprops, elem)) {
1978                         prop = zfs_name_to_prop(nvpair_name(elem));
1979                         zfs_setprop_error(hdl, prop, errno, errbuf);
1980                 }
1981                 nvlist_free(errorprops);
1982
1983                 if (added_resv && errno == ENOSPC) {
1984                         /* clean up the volsize property we tried to set */
1985                         uint64_t old_volsize = zfs_prop_get_int(zhp,
1986                             ZFS_PROP_VOLSIZE);
1987                         nvlist_free(nvl);
1988                         nvl = NULL;
1989                         zcmd_free_nvlists(&zc);
1990
1991                         if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0) != 0)
1992                                 goto error;
1993                         if (nvlist_add_uint64(nvl,
1994                             zfs_prop_to_name(ZFS_PROP_VOLSIZE),
1995                             old_volsize) != 0)
1996                                 goto error;
1997                         if (zcmd_write_src_nvlist(hdl, &zc, nvl) != 0)
1998                                 goto error;
1999                         (void) zfs_ioctl(hdl, ZFS_IOC_SET_PROP, &zc);
2000                 }
2001         } else {
2002                 for (cl_idx = 0; cl_idx < nvl_len; cl_idx++) {
2003                         if (cls[cl_idx] != NULL) {
2004                                 int clp_err = changelist_postfix(cls[cl_idx]);
2005                                 if (clp_err != 0)
2006                                         ret = clp_err;
2007                         }
2008                 }
2009
2010                 if (ret == 0) {
2011                         /*
2012                          * Refresh the statistics so the new property
2013                          * value is reflected.
2014                          */
2015                         (void) get_stats(zhp);
2016
2017                         /*
2018                          * Remount the filesystem to propagate the change
2019                          * if one of the options handled by the generic
2020                          * Linux namespace layer has been modified.
2021                          */
2022                         if (zfs_is_namespace_prop(prop) &&
2023                             zfs_is_mounted(zhp, NULL))
2024                                 ret = zfs_mount(zhp, MNTOPT_REMOUNT, 0);
2025                 }
2026         }
2027
2028 error:
2029         nvlist_free(nvl);
2030         zcmd_free_nvlists(&zc);
2031         if (cls != NULL) {
2032                 for (cl_idx = 0; cl_idx < nvl_len; cl_idx++) {
2033                         if (cls[cl_idx] != NULL)
2034                                 changelist_free(cls[cl_idx]);
2035                 }
2036                 free(cls);
2037         }
2038         return (ret);
2039 }
2040
2041 /*
2042  * Given a property, inherit the value from the parent dataset, or if received
2043  * is TRUE, revert to the received value, if any.
2044  */
2045 int
2046 zfs_prop_inherit(zfs_handle_t *zhp, const char *propname, boolean_t received)
2047 {
2048         zfs_cmd_t zc = {"\0"};
2049         int ret;
2050         prop_changelist_t *cl;
2051         libzfs_handle_t *hdl = zhp->zfs_hdl;
2052         char errbuf[1024];
2053         zfs_prop_t prop;
2054
2055         (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
2056             "cannot inherit %s for '%s'"), propname, zhp->zfs_name);
2057
2058         zc.zc_cookie = received;
2059         if ((prop = zfs_name_to_prop(propname)) == ZPROP_INVAL) {
2060                 /*
2061                  * For user properties, the amount of work we have to do is very
2062                  * small, so just do it here.
2063                  */
2064                 if (!zfs_prop_user(propname)) {
2065                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
2066                             "invalid property"));
2067                         return (zfs_error(hdl, EZFS_BADPROP, errbuf));
2068                 }
2069
2070                 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
2071                 (void) strlcpy(zc.zc_value, propname, sizeof (zc.zc_value));
2072
2073                 if (zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_INHERIT_PROP, &zc) != 0)
2074                         return (zfs_standard_error(hdl, errno, errbuf));
2075
2076                 return (0);
2077         }
2078
2079         /*
2080          * Verify that this property is inheritable.
2081          */
2082         if (zfs_prop_readonly(prop))
2083                 return (zfs_error(hdl, EZFS_PROPREADONLY, errbuf));
2084
2085         if (!zfs_prop_inheritable(prop) && !received)
2086                 return (zfs_error(hdl, EZFS_PROPNONINHERIT, errbuf));
2087
2088         /*
2089          * Check to see if the value applies to this type
2090          */
2091         if (!zfs_prop_valid_for_type(prop, zhp->zfs_type, B_FALSE))
2092                 return (zfs_error(hdl, EZFS_PROPTYPE, errbuf));
2093
2094         /*
2095          * Normalize the name, to get rid of shorthand abbreviations.
2096          */
2097         propname = zfs_prop_to_name(prop);
2098         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
2099         (void) strlcpy(zc.zc_value, propname, sizeof (zc.zc_value));
2100
2101         if (prop == ZFS_PROP_MOUNTPOINT && getzoneid() == GLOBAL_ZONEID &&
2102             zfs_prop_get_int(zhp, ZFS_PROP_ZONED)) {
2103                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
2104                     "dataset is used in a non-global zone"));
2105                 return (zfs_error(hdl, EZFS_ZONED, errbuf));
2106         }
2107
2108         /*
2109          * Determine datasets which will be affected by this change, if any.
2110          */
2111         if ((cl = changelist_gather(zhp, prop, 0, 0)) == NULL)
2112                 return (-1);
2113
2114         if (prop == ZFS_PROP_MOUNTPOINT && changelist_haszonedchild(cl)) {
2115                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
2116                     "child dataset with inherited mountpoint is used "
2117                     "in a non-global zone"));
2118                 ret = zfs_error(hdl, EZFS_ZONED, errbuf);
2119                 goto error;
2120         }
2121
2122         if ((ret = changelist_prefix(cl)) != 0)
2123                 goto error;
2124
2125         if ((ret = zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_INHERIT_PROP, &zc)) != 0) {
2126                 return (zfs_standard_error(hdl, errno, errbuf));
2127         } else {
2128
2129                 if ((ret = changelist_postfix(cl)) != 0)
2130                         goto error;
2131
2132                 /*
2133                  * Refresh the statistics so the new property is reflected.
2134                  */
2135                 (void) get_stats(zhp);
2136
2137                 /*
2138                  * Remount the filesystem to propagate the change
2139                  * if one of the options handled by the generic
2140                  * Linux namespace layer has been modified.
2141                  */
2142                 if (zfs_is_namespace_prop(prop) &&
2143                     zfs_is_mounted(zhp, NULL))
2144                         ret = zfs_mount(zhp, MNTOPT_REMOUNT, 0);
2145         }
2146
2147 error:
2148         changelist_free(cl);
2149         return (ret);
2150 }
2151
2152 /*
2153  * True DSL properties are stored in an nvlist.  The following two functions
2154  * extract them appropriately.
2155  */
2156 uint64_t
2157 getprop_uint64(zfs_handle_t *zhp, zfs_prop_t prop, char **source)
2158 {
2159         nvlist_t *nv;
2160         uint64_t value;
2161
2162         *source = NULL;
2163         if (nvlist_lookup_nvlist(zhp->zfs_props,
2164             zfs_prop_to_name(prop), &nv) == 0) {
2165                 verify(nvlist_lookup_uint64(nv, ZPROP_VALUE, &value) == 0);
2166                 (void) nvlist_lookup_string(nv, ZPROP_SOURCE, source);
2167         } else {
2168                 verify(!zhp->zfs_props_table ||
2169                     zhp->zfs_props_table[prop] == B_TRUE);
2170                 value = zfs_prop_default_numeric(prop);
2171                 *source = "";
2172         }
2173
2174         return (value);
2175 }
2176
2177 static const char *
2178 getprop_string(zfs_handle_t *zhp, zfs_prop_t prop, char **source)
2179 {
2180         nvlist_t *nv;
2181         const char *value;
2182
2183         *source = NULL;
2184         if (nvlist_lookup_nvlist(zhp->zfs_props,
2185             zfs_prop_to_name(prop), &nv) == 0) {
2186                 value = fnvlist_lookup_string(nv, ZPROP_VALUE);
2187                 (void) nvlist_lookup_string(nv, ZPROP_SOURCE, source);
2188         } else {
2189                 verify(!zhp->zfs_props_table ||
2190                     zhp->zfs_props_table[prop] == B_TRUE);
2191                 value = zfs_prop_default_string(prop);
2192                 *source = "";
2193         }
2194
2195         return (value);
2196 }
2197
2198 static boolean_t
2199 zfs_is_recvd_props_mode(zfs_handle_t *zhp)
2200 {
2201         return (zhp->zfs_props == zhp->zfs_recvd_props);
2202 }
2203
2204 static void
2205 zfs_set_recvd_props_mode(zfs_handle_t *zhp, uint64_t *cookie)
2206 {
2207         *cookie = (uint64_t)(uintptr_t)zhp->zfs_props;
2208         zhp->zfs_props = zhp->zfs_recvd_props;
2209 }
2210
2211 static void
2212 zfs_unset_recvd_props_mode(zfs_handle_t *zhp, uint64_t *cookie)
2213 {
2214         zhp->zfs_props = (nvlist_t *)(uintptr_t)*cookie;
2215         *cookie = 0;
2216 }
2217
2218 /*
2219  * Internal function for getting a numeric property.  Both zfs_prop_get() and
2220  * zfs_prop_get_int() are built using this interface.
2221  *
2222  * Certain properties can be overridden using 'mount -o'.  In this case, scan
2223  * the contents of the /proc/self/mounts entry, searching for the
2224  * appropriate options. If they differ from the on-disk values, report the
2225  * current values and mark the source "temporary".
2226  */
2227 static int
2228 get_numeric_property(zfs_handle_t *zhp, zfs_prop_t prop, zprop_source_t *src,
2229     char **source, uint64_t *val)
2230 {
2231         zfs_cmd_t zc = {"\0"};
2232         nvlist_t *zplprops = NULL;
2233         struct mnttab mnt;
2234         char *mntopt_on = NULL;
2235         char *mntopt_off = NULL;
2236         boolean_t received = zfs_is_recvd_props_mode(zhp);
2237
2238         *source = NULL;
2239
2240         /*
2241          * If the property is being fetched for a snapshot, check whether
2242          * the property is valid for the snapshot's head dataset type.
2243          */
2244         if (zhp->zfs_type == ZFS_TYPE_SNAPSHOT &&
2245             !zfs_prop_valid_for_type(prop, zhp->zfs_head_type, B_TRUE)) {
2246                 *val = zfs_prop_default_numeric(prop);
2247                 return (-1);
2248         }
2249
2250         switch (prop) {
2251         case ZFS_PROP_ATIME:
2252                 mntopt_on = MNTOPT_ATIME;
2253                 mntopt_off = MNTOPT_NOATIME;
2254                 break;
2255
2256         case ZFS_PROP_RELATIME:
2257                 mntopt_on = MNTOPT_RELATIME;
2258                 mntopt_off = MNTOPT_NORELATIME;
2259                 break;
2260
2261         case ZFS_PROP_DEVICES:
2262                 mntopt_on = MNTOPT_DEVICES;
2263                 mntopt_off = MNTOPT_NODEVICES;
2264                 break;
2265
2266         case ZFS_PROP_EXEC:
2267                 mntopt_on = MNTOPT_EXEC;
2268                 mntopt_off = MNTOPT_NOEXEC;
2269                 break;
2270
2271         case ZFS_PROP_READONLY:
2272                 mntopt_on = MNTOPT_RO;
2273                 mntopt_off = MNTOPT_RW;
2274                 break;
2275
2276         case ZFS_PROP_SETUID:
2277                 mntopt_on = MNTOPT_SETUID;
2278                 mntopt_off = MNTOPT_NOSETUID;
2279                 break;
2280
2281         case ZFS_PROP_XATTR:
2282                 mntopt_on = MNTOPT_XATTR;
2283                 mntopt_off = MNTOPT_NOXATTR;
2284                 break;
2285
2286         case ZFS_PROP_NBMAND:
2287                 mntopt_on = MNTOPT_NBMAND;
2288                 mntopt_off = MNTOPT_NONBMAND;
2289                 break;
2290
2291         default:
2292                 break;
2293         }
2294
2295         /*
2296          * Because looking up the mount options is potentially expensive
2297          * (iterating over all of /proc/self/mounts), we defer its
2298          * calculation until we're looking up a property which requires
2299          * its presence.
2300          */
2301         if (!zhp->zfs_mntcheck &&
2302             (mntopt_on != NULL || prop == ZFS_PROP_MOUNTED)) {
2303                 libzfs_handle_t *hdl = zhp->zfs_hdl;
2304                 struct mnttab entry;
2305
2306                 if (libzfs_mnttab_find(hdl, zhp->zfs_name, &entry) == 0) {
2307                         zhp->zfs_mntopts = zfs_strdup(hdl,
2308                             entry.mnt_mntopts);
2309                         if (zhp->zfs_mntopts == NULL)
2310                                 return (-1);
2311                 }
2312
2313                 zhp->zfs_mntcheck = B_TRUE;
2314         }
2315
2316         if (zhp->zfs_mntopts == NULL)
2317                 mnt.mnt_mntopts = "";
2318         else
2319                 mnt.mnt_mntopts = zhp->zfs_mntopts;
2320
2321         switch (prop) {
2322         case ZFS_PROP_ATIME:
2323         case ZFS_PROP_RELATIME:
2324         case ZFS_PROP_DEVICES:
2325         case ZFS_PROP_EXEC:
2326         case ZFS_PROP_READONLY:
2327         case ZFS_PROP_SETUID:
2328         case ZFS_PROP_XATTR:
2329         case ZFS_PROP_NBMAND:
2330                 *val = getprop_uint64(zhp, prop, source);
2331
2332                 if (received)
2333                         break;
2334
2335                 if (hasmntopt(&mnt, mntopt_on) && !*val) {
2336                         *val = B_TRUE;
2337                         if (src)
2338                                 *src = ZPROP_SRC_TEMPORARY;
2339                 } else if (hasmntopt(&mnt, mntopt_off) && *val) {
2340                         *val = B_FALSE;
2341                         if (src)
2342                                 *src = ZPROP_SRC_TEMPORARY;
2343                 }
2344                 break;
2345
2346         case ZFS_PROP_CANMOUNT:
2347         case ZFS_PROP_VOLSIZE:
2348         case ZFS_PROP_QUOTA:
2349         case ZFS_PROP_REFQUOTA:
2350         case ZFS_PROP_RESERVATION:
2351         case ZFS_PROP_REFRESERVATION:
2352         case ZFS_PROP_FILESYSTEM_LIMIT:
2353         case ZFS_PROP_SNAPSHOT_LIMIT:
2354         case ZFS_PROP_FILESYSTEM_COUNT:
2355         case ZFS_PROP_SNAPSHOT_COUNT:
2356                 *val = getprop_uint64(zhp, prop, source);
2357
2358                 if (*source == NULL) {
2359                         /* not default, must be local */
2360                         *source = zhp->zfs_name;
2361                 }
2362                 break;
2363
2364         case ZFS_PROP_MOUNTED:
2365                 *val = (zhp->zfs_mntopts != NULL);
2366                 break;
2367
2368         case ZFS_PROP_NUMCLONES:
2369                 *val = zhp->zfs_dmustats.dds_num_clones;
2370                 break;
2371
2372         case ZFS_PROP_VERSION:
2373         case ZFS_PROP_NORMALIZE:
2374         case ZFS_PROP_UTF8ONLY:
2375         case ZFS_PROP_CASE:
2376                 if (zcmd_alloc_dst_nvlist(zhp->zfs_hdl, &zc, 0) != 0)
2377                         return (-1);
2378                 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
2379                 if (zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_OBJSET_ZPLPROPS, &zc)) {
2380                         zcmd_free_nvlists(&zc);
2381                         if (prop == ZFS_PROP_VERSION &&
2382                             zhp->zfs_type == ZFS_TYPE_VOLUME)
2383                                 *val = zfs_prop_default_numeric(prop);
2384                         return (-1);
2385                 }
2386                 if (zcmd_read_dst_nvlist(zhp->zfs_hdl, &zc, &zplprops) != 0 ||
2387                     nvlist_lookup_uint64(zplprops, zfs_prop_to_name(prop),
2388                     val) != 0) {
2389                         zcmd_free_nvlists(&zc);
2390                         return (-1);
2391                 }
2392                 nvlist_free(zplprops);
2393                 zcmd_free_nvlists(&zc);
2394                 break;
2395
2396         case ZFS_PROP_INCONSISTENT:
2397                 *val = zhp->zfs_dmustats.dds_inconsistent;
2398                 break;
2399
2400         default:
2401                 switch (zfs_prop_get_type(prop)) {
2402                 case PROP_TYPE_NUMBER:
2403                 case PROP_TYPE_INDEX:
2404                         *val = getprop_uint64(zhp, prop, source);
2405                         /*
2406                          * If we tried to use a default value for a
2407                          * readonly property, it means that it was not
2408                          * present.  Note this only applies to "truly"
2409                          * readonly properties, not set-once properties
2410                          * like volblocksize.
2411                          */
2412                         if (zfs_prop_readonly(prop) &&
2413                             !zfs_prop_setonce(prop) &&
2414                             *source != NULL && (*source)[0] == '\0') {
2415                                 *source = NULL;
2416                                 return (-1);
2417                         }
2418                         break;
2419
2420                 case PROP_TYPE_STRING:
2421                 default:
2422                         zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN,
2423                             "cannot get non-numeric property"));
2424                         return (zfs_error(zhp->zfs_hdl, EZFS_BADPROP,
2425                             dgettext(TEXT_DOMAIN, "internal error")));
2426                 }
2427         }
2428
2429         return (0);
2430 }
2431
2432 /*
2433  * Calculate the source type, given the raw source string.
2434  */
2435 static void
2436 get_source(zfs_handle_t *zhp, zprop_source_t *srctype, char *source,
2437     char *statbuf, size_t statlen)
2438 {
2439         if (statbuf == NULL ||
2440             srctype == NULL || *srctype == ZPROP_SRC_TEMPORARY) {
2441                 return;
2442         }
2443
2444         if (source == NULL) {
2445                 *srctype = ZPROP_SRC_NONE;
2446         } else if (source[0] == '\0') {
2447                 *srctype = ZPROP_SRC_DEFAULT;
2448         } else if (strstr(source, ZPROP_SOURCE_VAL_RECVD) != NULL) {
2449                 *srctype = ZPROP_SRC_RECEIVED;
2450         } else {
2451                 if (strcmp(source, zhp->zfs_name) == 0) {
2452                         *srctype = ZPROP_SRC_LOCAL;
2453                 } else {
2454                         (void) strlcpy(statbuf, source, statlen);
2455                         *srctype = ZPROP_SRC_INHERITED;
2456                 }
2457         }
2458
2459 }
2460
2461 int
2462 zfs_prop_get_recvd(zfs_handle_t *zhp, const char *propname, char *propbuf,
2463     size_t proplen, boolean_t literal)
2464 {
2465         zfs_prop_t prop;
2466         int err = 0;
2467
2468         if (zhp->zfs_recvd_props == NULL)
2469                 if (get_recvd_props_ioctl(zhp) != 0)
2470                         return (-1);
2471
2472         prop = zfs_name_to_prop(propname);
2473
2474         if (prop != ZPROP_INVAL) {
2475                 uint64_t cookie;
2476                 if (!nvlist_exists(zhp->zfs_recvd_props, propname))
2477                         return (-1);
2478                 zfs_set_recvd_props_mode(zhp, &cookie);
2479                 err = zfs_prop_get(zhp, prop, propbuf, proplen,
2480                     NULL, NULL, 0, literal);
2481                 zfs_unset_recvd_props_mode(zhp, &cookie);
2482         } else {
2483                 nvlist_t *propval;
2484                 char *recvdval;
2485                 if (nvlist_lookup_nvlist(zhp->zfs_recvd_props,
2486                     propname, &propval) != 0)
2487                         return (-1);
2488                 verify(nvlist_lookup_string(propval, ZPROP_VALUE,
2489                     &recvdval) == 0);
2490                 (void) strlcpy(propbuf, recvdval, proplen);
2491         }
2492
2493         return (err == 0 ? 0 : -1);
2494 }
2495
2496 static int
2497 get_clones_string(zfs_handle_t *zhp, char *propbuf, size_t proplen)
2498 {
2499         nvlist_t *value;
2500         nvpair_t *pair;
2501
2502         value = zfs_get_clones_nvl(zhp);
2503         if (value == NULL)
2504                 return (-1);
2505
2506         propbuf[0] = '\0';
2507         for (pair = nvlist_next_nvpair(value, NULL); pair != NULL;
2508             pair = nvlist_next_nvpair(value, pair)) {
2509                 if (propbuf[0] != '\0')
2510                         (void) strlcat(propbuf, ",", proplen);
2511                 (void) strlcat(propbuf, nvpair_name(pair), proplen);
2512         }
2513
2514         return (0);
2515 }
2516
2517 struct get_clones_arg {
2518         uint64_t numclones;
2519         nvlist_t *value;
2520         const char *origin;
2521         char buf[ZFS_MAX_DATASET_NAME_LEN];
2522 };
2523
2524 int
2525 get_clones_cb(zfs_handle_t *zhp, void *arg)
2526 {
2527         struct get_clones_arg *gca = arg;
2528
2529         if (gca->numclones == 0) {
2530                 zfs_close(zhp);
2531                 return (0);
2532         }
2533
2534         if (zfs_prop_get(zhp, ZFS_PROP_ORIGIN, gca->buf, sizeof (gca->buf),
2535             NULL, NULL, 0, B_TRUE) != 0)
2536                 goto out;
2537         if (strcmp(gca->buf, gca->origin) == 0) {
2538                 fnvlist_add_boolean(gca->value, zfs_get_name(zhp));
2539                 gca->numclones--;
2540         }
2541
2542 out:
2543         (void) zfs_iter_children(zhp, get_clones_cb, gca);
2544         zfs_close(zhp);
2545         return (0);
2546 }
2547
2548 nvlist_t *
2549 zfs_get_clones_nvl(zfs_handle_t *zhp)
2550 {
2551         nvlist_t *nv, *value;
2552
2553         if (nvlist_lookup_nvlist(zhp->zfs_props,
2554             zfs_prop_to_name(ZFS_PROP_CLONES), &nv) != 0) {
2555                 struct get_clones_arg gca;
2556
2557                 /*
2558                  * if this is a snapshot, then the kernel wasn't able
2559                  * to get the clones.  Do it by slowly iterating.
2560                  */
2561                 if (zhp->zfs_type != ZFS_TYPE_SNAPSHOT)
2562                         return (NULL);
2563                 if (nvlist_alloc(&nv, NV_UNIQUE_NAME, 0) != 0)
2564                         return (NULL);
2565                 if (nvlist_alloc(&value, NV_UNIQUE_NAME, 0) != 0) {
2566                         nvlist_free(nv);
2567                         return (NULL);
2568                 }
2569
2570                 gca.numclones = zfs_prop_get_int(zhp, ZFS_PROP_NUMCLONES);
2571                 gca.value = value;
2572                 gca.origin = zhp->zfs_name;
2573
2574                 if (gca.numclones != 0) {
2575                         zfs_handle_t *root;
2576                         char pool[ZFS_MAX_DATASET_NAME_LEN];
2577                         char *cp = pool;
2578
2579                         /* get the pool name */
2580                         (void) strlcpy(pool, zhp->zfs_name, sizeof (pool));
2581                         (void) strsep(&cp, "/@");
2582                         root = zfs_open(zhp->zfs_hdl, pool,
2583                             ZFS_TYPE_FILESYSTEM);
2584                         if (root == NULL) {
2585                                 nvlist_free(nv);
2586                                 nvlist_free(value);
2587                                 return (NULL);
2588                         }
2589
2590                         (void) get_clones_cb(root, &gca);
2591                 }
2592
2593                 if (gca.numclones != 0 ||
2594                     nvlist_add_nvlist(nv, ZPROP_VALUE, value) != 0 ||
2595                     nvlist_add_nvlist(zhp->zfs_props,
2596                     zfs_prop_to_name(ZFS_PROP_CLONES), nv) != 0) {
2597                         nvlist_free(nv);
2598                         nvlist_free(value);
2599                         return (NULL);
2600                 }
2601                 nvlist_free(nv);
2602                 nvlist_free(value);
2603                 verify(0 == nvlist_lookup_nvlist(zhp->zfs_props,
2604                     zfs_prop_to_name(ZFS_PROP_CLONES), &nv));
2605         }
2606
2607         verify(nvlist_lookup_nvlist(nv, ZPROP_VALUE, &value) == 0);
2608
2609         return (value);
2610 }
2611
2612 /*
2613  * Accepts a property and value and checks that the value
2614  * matches the one found by the channel program. If they are
2615  * not equal, print both of them.
2616  */
2617 static void
2618 zcp_check(zfs_handle_t *zhp, zfs_prop_t prop, uint64_t intval,
2619     const char *strval)
2620 {
2621         if (!zhp->zfs_hdl->libzfs_prop_debug)
2622                 return;
2623         int error;
2624         char *poolname = zhp->zpool_hdl->zpool_name;
2625         const char *prop_name = zfs_prop_to_name(prop);
2626         const char *program =
2627             "args = ...\n"
2628             "ds = args['dataset']\n"
2629             "prop = args['property']\n"
2630             "value, setpoint = zfs.get_prop(ds, prop)\n"
2631             "return {value=value, setpoint=setpoint}\n";
2632         nvlist_t *outnvl;
2633         nvlist_t *retnvl;
2634         nvlist_t *argnvl = fnvlist_alloc();
2635
2636         fnvlist_add_string(argnvl, "dataset", zhp->zfs_name);
2637         fnvlist_add_string(argnvl, "property", zfs_prop_to_name(prop));
2638
2639         error = lzc_channel_program_nosync(poolname, program,
2640             10 * 1000 * 1000, 10 * 1024 * 1024, argnvl, &outnvl);
2641
2642         if (error == 0) {
2643                 retnvl = fnvlist_lookup_nvlist(outnvl, "return");
2644                 if (zfs_prop_get_type(prop) == PROP_TYPE_NUMBER) {
2645                         int64_t ans;
2646                         error = nvlist_lookup_int64(retnvl, "value", &ans);
2647                         if (error != 0) {
2648                                 (void) fprintf(stderr, "%s: zcp check error: "
2649                                     "%u\n", prop_name, error);
2650                                 return;
2651                         }
2652                         if (ans != intval) {
2653                                 (void) fprintf(stderr, "%s: zfs found %llu, "
2654                                     "but zcp found %llu\n", prop_name,
2655                                     (u_longlong_t)intval, (u_longlong_t)ans);
2656                         }
2657                 } else {
2658                         char *str_ans;
2659                         error = nvlist_lookup_string(retnvl, "value", &str_ans);
2660                         if (error != 0) {
2661                                 (void) fprintf(stderr, "%s: zcp check error: "
2662                                     "%u\n", prop_name, error);
2663                                 return;
2664                         }
2665                         if (strcmp(strval, str_ans) != 0) {
2666                                 (void) fprintf(stderr,
2667                                     "%s: zfs found '%s', but zcp found '%s'\n",
2668                                     prop_name, strval, str_ans);
2669                         }
2670                 }
2671         } else {
2672                 (void) fprintf(stderr, "%s: zcp check failed, channel program "
2673                     "error: %u\n", prop_name, error);
2674         }
2675         nvlist_free(argnvl);
2676         nvlist_free(outnvl);
2677 }
2678
2679 /*
2680  * Retrieve a property from the given object.  If 'literal' is specified, then
2681  * numbers are left as exact values.  Otherwise, numbers are converted to a
2682  * human-readable form.
2683  *
2684  * Returns 0 on success, or -1 on error.
2685  */
2686 int
2687 zfs_prop_get(zfs_handle_t *zhp, zfs_prop_t prop, char *propbuf, size_t proplen,
2688     zprop_source_t *src, char *statbuf, size_t statlen, boolean_t literal)
2689 {
2690         char *source = NULL;
2691         uint64_t val;
2692         const char *str;
2693         const char *strval;
2694         boolean_t received = zfs_is_recvd_props_mode(zhp);
2695
2696         /*
2697          * Check to see if this property applies to our object
2698          */
2699         if (!zfs_prop_valid_for_type(prop, zhp->zfs_type, B_FALSE))
2700                 return (-1);
2701
2702         if (received && zfs_prop_readonly(prop))
2703                 return (-1);
2704
2705         if (src)
2706                 *src = ZPROP_SRC_NONE;
2707
2708         switch (prop) {
2709         case ZFS_PROP_CREATION:
2710                 /*
2711                  * 'creation' is a time_t stored in the statistics.  We convert
2712                  * this into a string unless 'literal' is specified.
2713                  */
2714                 {
2715                         val = getprop_uint64(zhp, prop, &source);
2716                         time_t time = (time_t)val;
2717                         struct tm t;
2718
2719                         if (literal ||
2720                             localtime_r(&time, &t) == NULL ||
2721                             strftime(propbuf, proplen, "%a %b %e %k:%M %Y",
2722                             &t) == 0)
2723                                 (void) snprintf(propbuf, proplen, "%llu",
2724                                     (u_longlong_t)val);
2725                 }
2726                 zcp_check(zhp, prop, val, NULL);
2727                 break;
2728
2729         case ZFS_PROP_MOUNTPOINT:
2730                 /*
2731                  * Getting the precise mountpoint can be tricky.
2732                  *
2733                  *  - for 'none' or 'legacy', return those values.
2734                  *  - for inherited mountpoints, we want to take everything
2735                  *    after our ancestor and append it to the inherited value.
2736                  *
2737                  * If the pool has an alternate root, we want to prepend that
2738                  * root to any values we return.
2739                  */
2740
2741                 str = getprop_string(zhp, prop, &source);
2742
2743                 if (str[0] == '/') {
2744                         char buf[MAXPATHLEN];
2745                         char *root = buf;
2746                         const char *relpath;
2747
2748                         /*
2749                          * If we inherit the mountpoint, even from a dataset
2750                          * with a received value, the source will be the path of
2751                          * the dataset we inherit from. If source is
2752                          * ZPROP_SOURCE_VAL_RECVD, the received value is not
2753                          * inherited.
2754                          */
2755                         if (strcmp(source, ZPROP_SOURCE_VAL_RECVD) == 0) {
2756                                 relpath = "";
2757                         } else {
2758                                 relpath = zhp->zfs_name + strlen(source);
2759                                 if (relpath[0] == '/')
2760                                         relpath++;
2761                         }
2762
2763                         if ((zpool_get_prop(zhp->zpool_hdl,
2764                             ZPOOL_PROP_ALTROOT, buf, MAXPATHLEN, NULL,
2765                             B_FALSE)) || (strcmp(root, "-") == 0))
2766                                 root[0] = '\0';
2767                         /*
2768                          * Special case an alternate root of '/'. This will
2769                          * avoid having multiple leading slashes in the
2770                          * mountpoint path.
2771                          */
2772                         if (strcmp(root, "/") == 0)
2773                                 root++;
2774
2775                         /*
2776                          * If the mountpoint is '/' then skip over this
2777                          * if we are obtaining either an alternate root or
2778                          * an inherited mountpoint.
2779                          */
2780                         if (str[1] == '\0' && (root[0] != '\0' ||
2781                             relpath[0] != '\0'))
2782                                 str++;
2783
2784                         if (relpath[0] == '\0')
2785                                 (void) snprintf(propbuf, proplen, "%s%s",
2786                                     root, str);
2787                         else
2788                                 (void) snprintf(propbuf, proplen, "%s%s%s%s",
2789                                     root, str, relpath[0] == '@' ? "" : "/",
2790                                     relpath);
2791                 } else {
2792                         /* 'legacy' or 'none' */
2793                         (void) strlcpy(propbuf, str, proplen);
2794                 }
2795                 zcp_check(zhp, prop, 0, propbuf);
2796                 break;
2797
2798         case ZFS_PROP_ORIGIN:
2799                 str = getprop_string(zhp, prop, &source);
2800                 if (str == NULL)
2801                         return (-1);
2802                 (void) strlcpy(propbuf, str, proplen);
2803                 zcp_check(zhp, prop, 0, str);
2804                 break;
2805
2806         case ZFS_PROP_CLONES:
2807                 if (get_clones_string(zhp, propbuf, proplen) != 0)
2808                         return (-1);
2809                 break;
2810
2811         case ZFS_PROP_QUOTA:
2812         case ZFS_PROP_REFQUOTA:
2813         case ZFS_PROP_RESERVATION:
2814         case ZFS_PROP_REFRESERVATION:
2815
2816                 if (get_numeric_property(zhp, prop, src, &source, &val) != 0)
2817                         return (-1);
2818                 /*
2819                  * If quota or reservation is 0, we translate this into 'none'
2820                  * (unless literal is set), and indicate that it's the default
2821                  * value.  Otherwise, we print the number nicely and indicate
2822                  * that its set locally.
2823                  */
2824                 if (val == 0) {
2825                         if (literal)
2826                                 (void) strlcpy(propbuf, "0", proplen);
2827                         else
2828                                 (void) strlcpy(propbuf, "none", proplen);
2829                 } else {
2830                         if (literal)
2831                                 (void) snprintf(propbuf, proplen, "%llu",
2832                                     (u_longlong_t)val);
2833                         else
2834                                 zfs_nicebytes(val, propbuf, proplen);
2835                 }
2836                 zcp_check(zhp, prop, val, NULL);
2837                 break;
2838
2839         case ZFS_PROP_FILESYSTEM_LIMIT:
2840         case ZFS_PROP_SNAPSHOT_LIMIT:
2841         case ZFS_PROP_FILESYSTEM_COUNT:
2842         case ZFS_PROP_SNAPSHOT_COUNT:
2843
2844                 if (get_numeric_property(zhp, prop, src, &source, &val) != 0)
2845                         return (-1);
2846
2847                 /*
2848                  * If limit is UINT64_MAX, we translate this into 'none' (unless
2849                  * literal is set), and indicate that it's the default value.
2850                  * Otherwise, we print the number nicely and indicate that it's
2851                  * set locally.
2852                  */
2853                 if (literal) {
2854                         (void) snprintf(propbuf, proplen, "%llu",
2855                             (u_longlong_t)val);
2856                 } else if (val == UINT64_MAX) {
2857                         (void) strlcpy(propbuf, "none", proplen);
2858                 } else {
2859                         zfs_nicenum(val, propbuf, proplen);
2860                 }
2861
2862                 zcp_check(zhp, prop, val, NULL);
2863                 break;
2864
2865         case ZFS_PROP_REFRATIO:
2866         case ZFS_PROP_COMPRESSRATIO:
2867                 if (get_numeric_property(zhp, prop, src, &source, &val) != 0)
2868                         return (-1);
2869                 if (literal)
2870                         (void) snprintf(propbuf, proplen, "%llu.%02llu",
2871                             (u_longlong_t)(val / 100),
2872                             (u_longlong_t)(val % 100));
2873                 else
2874                         (void) snprintf(propbuf, proplen, "%llu.%02llux",
2875                             (u_longlong_t)(val / 100),
2876                             (u_longlong_t)(val % 100));
2877                 zcp_check(zhp, prop, val, NULL);
2878                 break;
2879
2880         case ZFS_PROP_TYPE:
2881                 switch (zhp->zfs_type) {
2882                 case ZFS_TYPE_FILESYSTEM:
2883                         str = "filesystem";
2884                         break;
2885                 case ZFS_TYPE_VOLUME:
2886                         str = "volume";
2887                         break;
2888                 case ZFS_TYPE_SNAPSHOT:
2889                         str = "snapshot";
2890                         break;
2891                 case ZFS_TYPE_BOOKMARK:
2892                         str = "bookmark";
2893                         break;
2894                 default:
2895                         abort();
2896                 }
2897                 (void) snprintf(propbuf, proplen, "%s", str);
2898                 zcp_check(zhp, prop, 0, propbuf);
2899                 break;
2900
2901         case ZFS_PROP_MOUNTED:
2902                 /*
2903                  * The 'mounted' property is a pseudo-property that described
2904                  * whether the filesystem is currently mounted.  Even though
2905                  * it's a boolean value, the typical values of "on" and "off"
2906                  * don't make sense, so we translate to "yes" and "no".
2907                  */
2908                 if (get_numeric_property(zhp, ZFS_PROP_MOUNTED,
2909                     src, &source, &val) != 0)
2910                         return (-1);
2911                 if (val)
2912                         (void) strlcpy(propbuf, "yes", proplen);
2913                 else
2914                         (void) strlcpy(propbuf, "no", proplen);
2915                 break;
2916
2917         case ZFS_PROP_NAME:
2918                 /*
2919                  * The 'name' property is a pseudo-property derived from the
2920                  * dataset name.  It is presented as a real property to simplify
2921                  * consumers.
2922                  */
2923                 (void) strlcpy(propbuf, zhp->zfs_name, proplen);
2924                 zcp_check(zhp, prop, 0, propbuf);
2925                 break;
2926
2927         case ZFS_PROP_MLSLABEL:
2928                 {
2929 #ifdef HAVE_MLSLABEL
2930                         m_label_t *new_sl = NULL;
2931                         char *ascii = NULL;     /* human readable label */
2932
2933                         (void) strlcpy(propbuf,
2934                             getprop_string(zhp, prop, &source), proplen);
2935
2936                         if (literal || (strcasecmp(propbuf,
2937                             ZFS_MLSLABEL_DEFAULT) == 0))
2938                                 break;
2939
2940                         /*
2941                          * Try to translate the internal hex string to
2942                          * human-readable output.  If there are any
2943                          * problems just use the hex string.
2944                          */
2945
2946                         if (str_to_label(propbuf, &new_sl, MAC_LABEL,
2947                             L_NO_CORRECTION, NULL) == -1) {
2948                                 m_label_free(new_sl);
2949                                 break;
2950                         }
2951
2952                         if (label_to_str(new_sl, &ascii, M_LABEL,
2953                             DEF_NAMES) != 0) {
2954                                 if (ascii)
2955                                         free(ascii);
2956                                 m_label_free(new_sl);
2957                                 break;
2958                         }
2959                         m_label_free(new_sl);
2960
2961                         (void) strlcpy(propbuf, ascii, proplen);
2962                         free(ascii);
2963 #else
2964                         (void) strlcpy(propbuf,
2965                             getprop_string(zhp, prop, &source), proplen);
2966 #endif /* HAVE_MLSLABEL */
2967                 }
2968                 break;
2969
2970         case ZFS_PROP_GUID:
2971         case ZFS_PROP_CREATETXG:
2972                 /*
2973                  * GUIDs are stored as numbers, but they are identifiers.
2974                  * We don't want them to be pretty printed, because pretty
2975                  * printing mangles the ID into a truncated and useless value.
2976                  */
2977                 if (get_numeric_property(zhp, prop, src, &source, &val) != 0)
2978                         return (-1);
2979                 (void) snprintf(propbuf, proplen, "%llu", (u_longlong_t)val);
2980                 zcp_check(zhp, prop, val, NULL);
2981                 break;
2982
2983         case ZFS_PROP_REFERENCED:
2984         case ZFS_PROP_AVAILABLE:
2985         case ZFS_PROP_USED:
2986         case ZFS_PROP_USEDSNAP:
2987         case ZFS_PROP_USEDDS:
2988         case ZFS_PROP_USEDREFRESERV:
2989         case ZFS_PROP_USEDCHILD:
2990                 if (get_numeric_property(zhp, prop, src, &source, &val) != 0)
2991                         return (-1);
2992                 if (literal) {
2993                         (void) snprintf(propbuf, proplen, "%llu",
2994                             (u_longlong_t)val);
2995                 } else {
2996                         zfs_nicebytes(val, propbuf, proplen);
2997                 }
2998                 zcp_check(zhp, prop, val, NULL);
2999                 break;
3000
3001         default:
3002                 switch (zfs_prop_get_type(prop)) {
3003                 case PROP_TYPE_NUMBER:
3004                         if (get_numeric_property(zhp, prop, src,
3005                             &source, &val) != 0) {
3006                                 return (-1);
3007                         }
3008
3009                         if (literal) {
3010                                 (void) snprintf(propbuf, proplen, "%llu",
3011                                     (u_longlong_t)val);
3012                         } else {
3013                                 zfs_nicenum(val, propbuf, proplen);
3014                         }
3015                         zcp_check(zhp, prop, val, NULL);
3016                         break;
3017
3018                 case PROP_TYPE_STRING:
3019                         str = getprop_string(zhp, prop, &source);
3020                         if (str == NULL)
3021                                 return (-1);
3022
3023                         (void) strlcpy(propbuf, str, proplen);
3024                         zcp_check(zhp, prop, 0, str);
3025                         break;
3026
3027                 case PROP_TYPE_INDEX:
3028                         if (get_numeric_property(zhp, prop, src,
3029                             &source, &val) != 0)
3030                                 return (-1);
3031                         if (zfs_prop_index_to_string(prop, val, &strval) != 0)
3032                                 return (-1);
3033
3034                         (void) strlcpy(propbuf, strval, proplen);
3035                         zcp_check(zhp, prop, 0, strval);
3036                         break;
3037
3038                 default:
3039                         abort();
3040                 }
3041         }
3042
3043         get_source(zhp, src, source, statbuf, statlen);
3044
3045         return (0);
3046 }
3047
3048 /*
3049  * Utility function to get the given numeric property.  Does no validation that
3050  * the given property is the appropriate type; should only be used with
3051  * hard-coded property types.
3052  */
3053 uint64_t
3054 zfs_prop_get_int(zfs_handle_t *zhp, zfs_prop_t prop)
3055 {
3056         char *source;
3057         uint64_t val = 0;
3058
3059         (void) get_numeric_property(zhp, prop, NULL, &source, &val);
3060
3061         return (val);
3062 }
3063
3064 int
3065 zfs_prop_set_int(zfs_handle_t *zhp, zfs_prop_t prop, uint64_t val)
3066 {
3067         char buf[64];
3068
3069         (void) snprintf(buf, sizeof (buf), "%llu", (longlong_t)val);
3070         return (zfs_prop_set(zhp, zfs_prop_to_name(prop), buf));
3071 }
3072
3073 /*
3074  * Similar to zfs_prop_get(), but returns the value as an integer.
3075  */
3076 int
3077 zfs_prop_get_numeric(zfs_handle_t *zhp, zfs_prop_t prop, uint64_t *value,
3078     zprop_source_t *src, char *statbuf, size_t statlen)
3079 {
3080         char *source;
3081
3082         /*
3083          * Check to see if this property applies to our object
3084          */
3085         if (!zfs_prop_valid_for_type(prop, zhp->zfs_type, B_FALSE)) {
3086                 return (zfs_error_fmt(zhp->zfs_hdl, EZFS_PROPTYPE,
3087                     dgettext(TEXT_DOMAIN, "cannot get property '%s'"),
3088                     zfs_prop_to_name(prop)));
3089         }
3090
3091         if (src)
3092                 *src = ZPROP_SRC_NONE;
3093
3094         if (get_numeric_property(zhp, prop, src, &source, value) != 0)
3095                 return (-1);
3096
3097         get_source(zhp, src, source, statbuf, statlen);
3098
3099         return (0);
3100 }
3101
3102 #ifdef HAVE_IDMAP
3103 static int
3104 idmap_id_to_numeric_domain_rid(uid_t id, boolean_t isuser,
3105     char **domainp, idmap_rid_t *ridp)
3106 {
3107         idmap_get_handle_t *get_hdl = NULL;
3108         idmap_stat status;
3109         int err = EINVAL;
3110
3111         if (idmap_get_create(&get_hdl) != IDMAP_SUCCESS)
3112                 goto out;
3113
3114         if (isuser) {
3115                 err = idmap_get_sidbyuid(get_hdl, id,
3116                     IDMAP_REQ_FLG_USE_CACHE, domainp, ridp, &status);
3117         } else {
3118                 err = idmap_get_sidbygid(get_hdl, id,
3119                     IDMAP_REQ_FLG_USE_CACHE, domainp, ridp, &status);
3120         }
3121         if (err == IDMAP_SUCCESS &&
3122             idmap_get_mappings(get_hdl) == IDMAP_SUCCESS &&
3123             status == IDMAP_SUCCESS)
3124                 err = 0;
3125         else
3126                 err = EINVAL;
3127 out:
3128         if (get_hdl)
3129                 idmap_get_destroy(get_hdl);
3130         return (err);
3131 }
3132 #endif /* HAVE_IDMAP */
3133
3134 /*
3135  * convert the propname into parameters needed by kernel
3136  * Eg: userquota@ahrens -> ZFS_PROP_USERQUOTA, "", 126829
3137  * Eg: userused@matt@domain -> ZFS_PROP_USERUSED, "S-1-123-456", 789
3138  * Eg: groupquota@staff -> ZFS_PROP_GROUPQUOTA, "", 1234
3139  * Eg: groupused@staff -> ZFS_PROP_GROUPUSED, "", 1234
3140  * Eg: projectquota@123 -> ZFS_PROP_PROJECTQUOTA, "", 123
3141  * Eg: projectused@789 -> ZFS_PROP_PROJECTUSED, "", 789
3142  */
3143 static int
3144 userquota_propname_decode(const char *propname, boolean_t zoned,
3145     zfs_userquota_prop_t *typep, char *domain, int domainlen, uint64_t *ridp)
3146 {
3147         zfs_userquota_prop_t type;
3148         char *cp;
3149         boolean_t isuser;
3150         boolean_t isgroup;
3151         boolean_t isproject;
3152         struct passwd *pw;
3153         struct group *gr;
3154
3155         domain[0] = '\0';
3156
3157         /* Figure out the property type ({user|group|project}{quota|space}) */
3158         for (type = 0; type < ZFS_NUM_USERQUOTA_PROPS; type++) {
3159                 if (strncmp(propname, zfs_userquota_prop_prefixes[type],
3160                     strlen(zfs_userquota_prop_prefixes[type])) == 0)
3161                         break;
3162         }
3163         if (type == ZFS_NUM_USERQUOTA_PROPS)
3164                 return (EINVAL);
3165         *typep = type;
3166
3167         isuser = (type == ZFS_PROP_USERQUOTA || type == ZFS_PROP_USERUSED ||
3168             type == ZFS_PROP_USEROBJQUOTA ||
3169             type == ZFS_PROP_USEROBJUSED);
3170         isgroup = (type == ZFS_PROP_GROUPQUOTA || type == ZFS_PROP_GROUPUSED ||
3171             type == ZFS_PROP_GROUPOBJQUOTA ||
3172             type == ZFS_PROP_GROUPOBJUSED);
3173         isproject = (type == ZFS_PROP_PROJECTQUOTA ||
3174             type == ZFS_PROP_PROJECTUSED || type == ZFS_PROP_PROJECTOBJQUOTA ||
3175             type == ZFS_PROP_PROJECTOBJUSED);
3176
3177         cp = strchr(propname, '@') + 1;
3178
3179         if (isuser && (pw = getpwnam(cp)) != NULL) {
3180                 if (zoned && getzoneid() == GLOBAL_ZONEID)
3181                         return (ENOENT);
3182                 *ridp = pw->pw_uid;
3183         } else if (isgroup && (gr = getgrnam(cp)) != NULL) {
3184                 if (zoned && getzoneid() == GLOBAL_ZONEID)
3185                         return (ENOENT);
3186                 *ridp = gr->gr_gid;
3187         } else if (!isproject && strchr(cp, '@')) {
3188 #ifdef HAVE_IDMAP
3189                 /*
3190                  * It's a SID name (eg "user@domain") that needs to be
3191                  * turned into S-1-domainID-RID.
3192                  */
3193                 directory_error_t e;
3194                 char *numericsid = NULL;
3195                 char *end;
3196
3197                 if (zoned && getzoneid() == GLOBAL_ZONEID)
3198                         return (ENOENT);
3199                 if (isuser) {
3200                         e = directory_sid_from_user_name(NULL,
3201                             cp, &numericsid);
3202                 } else {
3203                         e = directory_sid_from_group_name(NULL,
3204                             cp, &numericsid);
3205                 }
3206                 if (e != NULL) {
3207                         directory_error_free(e);
3208                         return (ENOENT);
3209                 }
3210                 if (numericsid == NULL)
3211                         return (ENOENT);
3212                 cp = numericsid;
3213                 (void) strlcpy(domain, cp, domainlen);
3214                 cp = strrchr(domain, '-');
3215                 *cp = '\0';
3216                 cp++;
3217
3218                 errno = 0;
3219                 *ridp = strtoull(cp, &end, 10);
3220                 free(numericsid);
3221
3222                 if (errno != 0 || *end != '\0')
3223                         return (EINVAL);
3224 #else
3225                 return (ENOSYS);
3226 #endif /* HAVE_IDMAP */
3227         } else {
3228                 /* It's a user/group/project ID (eg "12345"). */
3229                 uid_t id;
3230                 char *end;
3231                 id = strtoul(cp, &end, 10);
3232                 if (*end != '\0')
3233                         return (EINVAL);
3234                 if (id > MAXUID && !isproject) {
3235 #ifdef HAVE_IDMAP
3236                         /* It's an ephemeral ID. */
3237                         idmap_rid_t rid;
3238                         char *mapdomain;
3239
3240                         if (idmap_id_to_numeric_domain_rid(id, isuser,
3241                             &mapdomain, &rid) != 0)
3242                                 return (ENOENT);
3243                         (void) strlcpy(domain, mapdomain, domainlen);
3244                         *ridp = rid;
3245 #else
3246                         return (ENOSYS);
3247 #endif /* HAVE_IDMAP */
3248                 } else {
3249                         *ridp = id;
3250                 }
3251         }
3252
3253         return (0);
3254 }
3255
3256 static int
3257 zfs_prop_get_userquota_common(zfs_handle_t *zhp, const char *propname,
3258     uint64_t *propvalue, zfs_userquota_prop_t *typep)
3259 {
3260         int err;
3261         zfs_cmd_t zc = {"\0"};
3262
3263         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
3264
3265         err = userquota_propname_decode(propname,
3266             zfs_prop_get_int(zhp, ZFS_PROP_ZONED),
3267             typep, zc.zc_value, sizeof (zc.zc_value), &zc.zc_guid);
3268         zc.zc_objset_type = *typep;
3269         if (err)
3270                 return (err);
3271
3272         err = ioctl(zhp->zfs_hdl->libzfs_fd, ZFS_IOC_USERSPACE_ONE, &zc);
3273         if (err)
3274                 return (err);
3275
3276         *propvalue = zc.zc_cookie;
3277         return (0);
3278 }
3279
3280 int
3281 zfs_prop_get_userquota_int(zfs_handle_t *zhp, const char *propname,
3282     uint64_t *propvalue)
3283 {
3284         zfs_userquota_prop_t type;
3285
3286         return (zfs_prop_get_userquota_common(zhp, propname, propvalue,
3287             &type));
3288 }
3289
3290 int
3291 zfs_prop_get_userquota(zfs_handle_t *zhp, const char *propname,
3292     char *propbuf, int proplen, boolean_t literal)
3293 {
3294         int err;
3295         uint64_t propvalue;
3296         zfs_userquota_prop_t type;
3297
3298         err = zfs_prop_get_userquota_common(zhp, propname, &propvalue,
3299             &type);
3300
3301         if (err)
3302                 return (err);
3303
3304         if (literal) {
3305                 (void) snprintf(propbuf, proplen, "%llu",
3306                     (u_longlong_t)propvalue);
3307         } else if (propvalue == 0 &&
3308             (type == ZFS_PROP_USERQUOTA || type == ZFS_PROP_GROUPQUOTA ||
3309             type == ZFS_PROP_USEROBJQUOTA || type == ZFS_PROP_GROUPOBJQUOTA ||
3310             type == ZFS_PROP_PROJECTQUOTA ||
3311             type == ZFS_PROP_PROJECTOBJQUOTA)) {
3312                 (void) strlcpy(propbuf, "none", proplen);
3313         } else if (type == ZFS_PROP_USERQUOTA || type == ZFS_PROP_GROUPQUOTA ||
3314             type == ZFS_PROP_USERUSED || type == ZFS_PROP_GROUPUSED ||
3315             type == ZFS_PROP_PROJECTUSED || type == ZFS_PROP_PROJECTQUOTA) {
3316                 zfs_nicebytes(propvalue, propbuf, proplen);
3317         } else {
3318                 zfs_nicenum(propvalue, propbuf, proplen);
3319         }
3320         return (0);
3321 }
3322
3323 int
3324 zfs_prop_get_written_int(zfs_handle_t *zhp, const char *propname,
3325     uint64_t *propvalue)
3326 {
3327         int err;
3328         zfs_cmd_t zc = {"\0"};
3329         const char *snapname;
3330
3331         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
3332
3333         snapname = strchr(propname, '@') + 1;
3334         if (strchr(snapname, '@')) {
3335                 (void) strlcpy(zc.zc_value, snapname, sizeof (zc.zc_value));
3336         } else {
3337                 /* snapname is the short name, append it to zhp's fsname */
3338                 char *cp;
3339
3340                 (void) strlcpy(zc.zc_value, zhp->zfs_name,
3341                     sizeof (zc.zc_value));
3342                 cp = strchr(zc.zc_value, '@');
3343                 if (cp != NULL)
3344                         *cp = '\0';
3345                 (void) strlcat(zc.zc_value, "@", sizeof (zc.zc_value));
3346                 (void) strlcat(zc.zc_value, snapname, sizeof (zc.zc_value));
3347         }
3348
3349         err = ioctl(zhp->zfs_hdl->libzfs_fd, ZFS_IOC_SPACE_WRITTEN, &zc);
3350         if (err)
3351                 return (err);
3352
3353         *propvalue = zc.zc_cookie;
3354         return (0);
3355 }
3356
3357 int
3358 zfs_prop_get_written(zfs_handle_t *zhp, const char *propname,
3359     char *propbuf, int proplen, boolean_t literal)
3360 {
3361         int err;
3362         uint64_t propvalue;
3363
3364         err = zfs_prop_get_written_int(zhp, propname, &propvalue);
3365
3366         if (err)
3367                 return (err);
3368
3369         if (literal) {
3370                 (void) snprintf(propbuf, proplen, "%llu",
3371                     (u_longlong_t)propvalue);
3372         } else {
3373                 zfs_nicebytes(propvalue, propbuf, proplen);
3374         }
3375
3376         return (0);
3377 }
3378
3379 /*
3380  * Returns the name of the given zfs handle.
3381  */
3382 const char *
3383 zfs_get_name(const zfs_handle_t *zhp)
3384 {
3385         return (zhp->zfs_name);
3386 }
3387
3388 /*
3389  * Returns the name of the parent pool for the given zfs handle.
3390  */
3391 const char *
3392 zfs_get_pool_name(const zfs_handle_t *zhp)
3393 {
3394         return (zhp->zpool_hdl->zpool_name);
3395 }
3396
3397 /*
3398  * Returns the type of the given zfs handle.
3399  */
3400 zfs_type_t
3401 zfs_get_type(const zfs_handle_t *zhp)
3402 {
3403         return (zhp->zfs_type);
3404 }
3405
3406 /*
3407  * Is one dataset name a child dataset of another?
3408  *
3409  * Needs to handle these cases:
3410  * Dataset 1    "a/foo"         "a/foo"         "a/foo"         "a/foo"
3411  * Dataset 2    "a/fo"          "a/foobar"      "a/bar/baz"     "a/foo/bar"
3412  * Descendant?  No.             No.             No.             Yes.
3413  */
3414 static boolean_t
3415 is_descendant(const char *ds1, const char *ds2)
3416 {
3417         size_t d1len = strlen(ds1);
3418
3419         /* ds2 can't be a descendant if it's smaller */
3420         if (strlen(ds2) < d1len)
3421                 return (B_FALSE);
3422
3423         /* otherwise, compare strings and verify that there's a '/' char */
3424         return (ds2[d1len] == '/' && (strncmp(ds1, ds2, d1len) == 0));
3425 }
3426
3427 /*
3428  * Given a complete name, return just the portion that refers to the parent.
3429  * Will return -1 if there is no parent (path is just the name of the
3430  * pool).
3431  */
3432 static int
3433 parent_name(const char *path, char *buf, size_t buflen)
3434 {
3435         char *slashp;
3436
3437         (void) strlcpy(buf, path, buflen);
3438
3439         if ((slashp = strrchr(buf, '/')) == NULL)
3440                 return (-1);
3441         *slashp = '\0';
3442
3443         return (0);
3444 }
3445
3446 int
3447 zfs_parent_name(zfs_handle_t *zhp, char *buf, size_t buflen)
3448 {
3449         return (parent_name(zfs_get_name(zhp), buf, buflen));
3450 }
3451
3452 /*
3453  * If accept_ancestor is false, then check to make sure that the given path has
3454  * a parent, and that it exists.  If accept_ancestor is true, then find the
3455  * closest existing ancestor for the given path.  In prefixlen return the
3456  * length of already existing prefix of the given path.  We also fetch the
3457  * 'zoned' property, which is used to validate property settings when creating
3458  * new datasets.
3459  */
3460 static int
3461 check_parents(libzfs_handle_t *hdl, const char *path, uint64_t *zoned,
3462     boolean_t accept_ancestor, int *prefixlen)
3463 {
3464         zfs_cmd_t zc = {"\0"};
3465         char parent[ZFS_MAX_DATASET_NAME_LEN];
3466         char *slash;
3467         zfs_handle_t *zhp;
3468         char errbuf[1024];
3469         uint64_t is_zoned;
3470
3471         (void) snprintf(errbuf, sizeof (errbuf),
3472             dgettext(TEXT_DOMAIN, "cannot create '%s'"), path);
3473
3474         /* get parent, and check to see if this is just a pool */
3475         if (parent_name(path, parent, sizeof (parent)) != 0) {
3476                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3477                     "missing dataset name"));
3478                 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3479         }
3480
3481         /* check to see if the pool exists */
3482         if ((slash = strchr(parent, '/')) == NULL)
3483                 slash = parent + strlen(parent);
3484         (void) strncpy(zc.zc_name, parent, slash - parent);
3485         zc.zc_name[slash - parent] = '\0';
3486         if (ioctl(hdl->libzfs_fd, ZFS_IOC_OBJSET_STATS, &zc) != 0 &&
3487             errno == ENOENT) {
3488                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3489                     "no such pool '%s'"), zc.zc_name);
3490                 return (zfs_error(hdl, EZFS_NOENT, errbuf));
3491         }
3492
3493         /* check to see if the parent dataset exists */
3494         while ((zhp = make_dataset_handle(hdl, parent)) == NULL) {
3495                 if (errno == ENOENT && accept_ancestor) {
3496                         /*
3497                          * Go deeper to find an ancestor, give up on top level.
3498                          */
3499                         if (parent_name(parent, parent, sizeof (parent)) != 0) {
3500                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3501                                     "no such pool '%s'"), zc.zc_name);
3502                                 return (zfs_error(hdl, EZFS_NOENT, errbuf));
3503                         }
3504                 } else if (errno == ENOENT) {
3505                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3506                             "parent does not exist"));
3507                         return (zfs_error(hdl, EZFS_NOENT, errbuf));
3508                 } else
3509                         return (zfs_standard_error(hdl, errno, errbuf));
3510         }
3511
3512         is_zoned = zfs_prop_get_int(zhp, ZFS_PROP_ZONED);
3513         if (zoned != NULL)
3514                 *zoned = is_zoned;
3515
3516         /* we are in a non-global zone, but parent is in the global zone */
3517         if (getzoneid() != GLOBAL_ZONEID && !is_zoned) {
3518                 (void) zfs_standard_error(hdl, EPERM, errbuf);
3519                 zfs_close(zhp);
3520                 return (-1);
3521         }
3522
3523         /* make sure parent is a filesystem */
3524         if (zfs_get_type(zhp) != ZFS_TYPE_FILESYSTEM) {
3525                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3526                     "parent is not a filesystem"));
3527                 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf);
3528                 zfs_close(zhp);
3529                 return (-1);
3530         }
3531
3532         zfs_close(zhp);
3533         if (prefixlen != NULL)
3534                 *prefixlen = strlen(parent);
3535         return (0);
3536 }
3537
3538 /*
3539  * Finds whether the dataset of the given type(s) exists.
3540  */
3541 boolean_t
3542 zfs_dataset_exists(libzfs_handle_t *hdl, const char *path, zfs_type_t types)
3543 {
3544         zfs_handle_t *zhp;
3545
3546         if (!zfs_validate_name(hdl, path, types, B_FALSE))
3547                 return (B_FALSE);
3548
3549         /*
3550          * Try to get stats for the dataset, which will tell us if it exists.
3551          */
3552         if ((zhp = make_dataset_handle(hdl, path)) != NULL) {
3553                 int ds_type = zhp->zfs_type;
3554
3555                 zfs_close(zhp);
3556                 if (types & ds_type)
3557                         return (B_TRUE);
3558         }
3559         return (B_FALSE);
3560 }
3561
3562 /*
3563  * Given a path to 'target', create all the ancestors between
3564  * the prefixlen portion of the path, and the target itself.
3565  * Fail if the initial prefixlen-ancestor does not already exist.
3566  */
3567 int
3568 create_parents(libzfs_handle_t *hdl, char *target, int prefixlen)
3569 {
3570         zfs_handle_t *h;
3571         char *cp;
3572         const char *opname;
3573
3574         /* make sure prefix exists */
3575         cp = target + prefixlen;
3576         if (*cp != '/') {
3577                 assert(strchr(cp, '/') == NULL);
3578                 h = zfs_open(hdl, target, ZFS_TYPE_FILESYSTEM);
3579         } else {
3580                 *cp = '\0';
3581                 h = zfs_open(hdl, target, ZFS_TYPE_FILESYSTEM);
3582                 *cp = '/';
3583         }
3584         if (h == NULL)
3585                 return (-1);
3586         zfs_close(h);
3587
3588         /*
3589          * Attempt to create, mount, and share any ancestor filesystems,
3590          * up to the prefixlen-long one.
3591          */
3592         for (cp = target + prefixlen + 1;
3593             (cp = strchr(cp, '/')) != NULL; *cp = '/', cp++) {
3594
3595                 *cp = '\0';
3596
3597                 h = make_dataset_handle(hdl, target);
3598                 if (h) {
3599                         /* it already exists, nothing to do here */
3600                         zfs_close(h);
3601                         continue;
3602                 }
3603
3604                 if (zfs_create(hdl, target, ZFS_TYPE_FILESYSTEM,
3605                     NULL) != 0) {
3606                         opname = dgettext(TEXT_DOMAIN, "create");
3607                         goto ancestorerr;
3608                 }
3609
3610                 h = zfs_open(hdl, target, ZFS_TYPE_FILESYSTEM);
3611                 if (h == NULL) {
3612                         opname = dgettext(TEXT_DOMAIN, "open");
3613                         goto ancestorerr;
3614                 }
3615
3616                 if (zfs_mount(h, NULL, 0) != 0) {
3617                         opname = dgettext(TEXT_DOMAIN, "mount");
3618                         goto ancestorerr;
3619                 }
3620
3621                 if (zfs_share(h) != 0) {
3622                         opname = dgettext(TEXT_DOMAIN, "share");
3623                         goto ancestorerr;
3624                 }
3625
3626                 zfs_close(h);
3627         }
3628
3629         return (0);
3630
3631 ancestorerr:
3632         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3633             "failed to %s ancestor '%s'"), opname, target);
3634         return (-1);
3635 }
3636
3637 /*
3638  * Creates non-existing ancestors of the given path.
3639  */
3640 int
3641 zfs_create_ancestors(libzfs_handle_t *hdl, const char *path)
3642 {
3643         int prefix;
3644         char *path_copy;
3645         char errbuf[1024];
3646         int rc = 0;
3647
3648         (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3649             "cannot create '%s'"), path);
3650
3651         /*
3652          * Check that we are not passing the nesting limit
3653          * before we start creating any ancestors.
3654          */
3655         if (dataset_nestcheck(path) != 0) {
3656                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3657                     "maximum name nesting depth exceeded"));
3658                 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3659         }
3660
3661         if (check_parents(hdl, path, NULL, B_TRUE, &prefix) != 0)
3662                 return (-1);
3663
3664         if ((path_copy = strdup(path)) != NULL) {
3665                 rc = create_parents(hdl, path_copy, prefix);
3666                 free(path_copy);
3667         }
3668         if (path_copy == NULL || rc != 0)
3669                 return (-1);
3670
3671         return (0);
3672 }
3673
3674 /*
3675  * Create a new filesystem or volume.
3676  */
3677 int
3678 zfs_create(libzfs_handle_t *hdl, const char *path, zfs_type_t type,
3679     nvlist_t *props)
3680 {
3681         int ret;
3682         uint64_t size = 0;
3683         uint64_t blocksize = zfs_prop_default_numeric(ZFS_PROP_VOLBLOCKSIZE);
3684         uint64_t zoned;
3685         enum lzc_dataset_type ost;
3686         zpool_handle_t *zpool_handle;
3687         uint8_t *wkeydata = NULL;
3688         uint_t wkeylen = 0;
3689         char errbuf[1024];
3690         char parent[ZFS_MAX_DATASET_NAME_LEN];
3691
3692         (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3693             "cannot create '%s'"), path);
3694
3695         /* validate the path, taking care to note the extended error message */
3696         if (!zfs_validate_name(hdl, path, type, B_TRUE))
3697                 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3698
3699         if (dataset_nestcheck(path) != 0) {
3700                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3701                     "maximum name nesting depth exceeded"));
3702                 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3703         }
3704
3705         /* validate parents exist */
3706         if (check_parents(hdl, path, &zoned, B_FALSE, NULL) != 0)
3707                 return (-1);
3708
3709         /*
3710          * The failure modes when creating a dataset of a different type over
3711          * one that already exists is a little strange.  In particular, if you
3712          * try to create a dataset on top of an existing dataset, the ioctl()
3713          * will return ENOENT, not EEXIST.  To prevent this from happening, we
3714          * first try to see if the dataset exists.
3715          */
3716         if (zfs_dataset_exists(hdl, path, ZFS_TYPE_DATASET)) {
3717                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3718                     "dataset already exists"));
3719                 return (zfs_error(hdl, EZFS_EXISTS, errbuf));
3720         }
3721
3722         if (type == ZFS_TYPE_VOLUME)
3723                 ost = LZC_DATSET_TYPE_ZVOL;
3724         else
3725                 ost = LZC_DATSET_TYPE_ZFS;
3726
3727         /* open zpool handle for prop validation */
3728         char pool_path[ZFS_MAX_DATASET_NAME_LEN];
3729         (void) strlcpy(pool_path, path, sizeof (pool_path));
3730
3731         /* truncate pool_path at first slash */
3732         char *p = strchr(pool_path, '/');
3733         if (p != NULL)
3734                 *p = '\0';
3735
3736         if ((zpool_handle = zpool_open(hdl, pool_path)) == NULL)
3737                 return (-1);
3738
3739         if (props && (props = zfs_valid_proplist(hdl, type, props,
3740             zoned, NULL, zpool_handle, B_TRUE, errbuf)) == 0) {
3741                 zpool_close(zpool_handle);
3742                 return (-1);
3743         }
3744         zpool_close(zpool_handle);
3745
3746         if (type == ZFS_TYPE_VOLUME) {
3747                 /*
3748                  * If we are creating a volume, the size and block size must
3749                  * satisfy a few restraints.  First, the blocksize must be a
3750                  * valid block size between SPA_{MIN,MAX}BLOCKSIZE.  Second, the
3751                  * volsize must be a multiple of the block size, and cannot be
3752                  * zero.
3753                  */
3754                 if (props == NULL || nvlist_lookup_uint64(props,
3755                     zfs_prop_to_name(ZFS_PROP_VOLSIZE), &size) != 0) {
3756                         nvlist_free(props);
3757                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3758                             "missing volume size"));
3759                         return (zfs_error(hdl, EZFS_BADPROP, errbuf));
3760                 }
3761
3762                 if ((ret = nvlist_lookup_uint64(props,
3763                     zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE),
3764                     &blocksize)) != 0) {
3765                         if (ret == ENOENT) {
3766                                 blocksize = zfs_prop_default_numeric(
3767                                     ZFS_PROP_VOLBLOCKSIZE);
3768                         } else {
3769                                 nvlist_free(props);
3770                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3771                                     "missing volume block size"));
3772                                 return (zfs_error(hdl, EZFS_BADPROP, errbuf));
3773                         }
3774                 }
3775
3776                 if (size == 0) {
3777                         nvlist_free(props);
3778                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3779                             "volume size cannot be zero"));
3780                         return (zfs_error(hdl, EZFS_BADPROP, errbuf));
3781                 }
3782
3783                 if (size % blocksize != 0) {
3784                         nvlist_free(props);
3785                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3786                             "volume size must be a multiple of volume block "
3787                             "size"));
3788                         return (zfs_error(hdl, EZFS_BADPROP, errbuf));
3789                 }
3790         }
3791
3792         (void) parent_name(path, parent, sizeof (parent));
3793         if (zfs_crypto_create(hdl, parent, props, NULL, B_TRUE,
3794             &wkeydata, &wkeylen) != 0) {
3795                 nvlist_free(props);
3796                 return (zfs_error(hdl, EZFS_CRYPTOFAILED, errbuf));
3797         }
3798
3799         /* create the dataset */
3800         ret = lzc_create(path, ost, props, wkeydata, wkeylen);
3801         nvlist_free(props);
3802         if (wkeydata != NULL)
3803                 free(wkeydata);
3804
3805         /* check for failure */
3806         if (ret != 0) {
3807                 switch (errno) {
3808                 case ENOENT:
3809                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3810                             "no such parent '%s'"), parent);
3811                         return (zfs_error(hdl, EZFS_NOENT, errbuf));
3812
3813                 case ENOTSUP:
3814                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3815                             "pool must be upgraded to set this "
3816                             "property or value"));
3817                         return (zfs_error(hdl, EZFS_BADVERSION, errbuf));
3818
3819                 case EACCES:
3820                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3821                             "encryption root's key is not loaded "
3822                             "or provided"));
3823                         return (zfs_error(hdl, EZFS_CRYPTOFAILED, errbuf));
3824
3825                 case ERANGE:
3826                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3827                             "invalid property value(s) specified"));
3828                         return (zfs_error(hdl, EZFS_BADPROP, errbuf));
3829 #ifdef _ILP32
3830                 case EOVERFLOW:
3831                         /*
3832                          * This platform can't address a volume this big.
3833                          */
3834                         if (type == ZFS_TYPE_VOLUME)
3835                                 return (zfs_error(hdl, EZFS_VOLTOOBIG,
3836                                     errbuf));
3837 #endif
3838                         /* FALLTHROUGH */
3839                 default:
3840                         return (zfs_standard_error(hdl, errno, errbuf));
3841                 }
3842         }
3843
3844         return (0);
3845 }
3846
3847 /*
3848  * Destroys the given dataset.  The caller must make sure that the filesystem
3849  * isn't mounted, and that there are no active dependents. If the file system
3850  * does not exist this function does nothing.
3851  */
3852 int
3853 zfs_destroy(zfs_handle_t *zhp, boolean_t defer)
3854 {
3855         int error;
3856
3857         if (zhp->zfs_type != ZFS_TYPE_SNAPSHOT && defer)
3858                 return (EINVAL);
3859
3860         if (zhp->zfs_type == ZFS_TYPE_BOOKMARK) {
3861                 nvlist_t *nv = fnvlist_alloc();
3862                 fnvlist_add_boolean(nv, zhp->zfs_name);
3863                 error = lzc_destroy_bookmarks(nv, NULL);
3864                 fnvlist_free(nv);
3865                 if (error != 0) {
3866                         return (zfs_standard_error_fmt(zhp->zfs_hdl, error,
3867                             dgettext(TEXT_DOMAIN, "cannot destroy '%s'"),
3868                             zhp->zfs_name));
3869                 }
3870                 return (0);
3871         }
3872
3873         if (zhp->zfs_type == ZFS_TYPE_SNAPSHOT) {
3874                 nvlist_t *nv = fnvlist_alloc();
3875                 fnvlist_add_boolean(nv, zhp->zfs_name);
3876                 error = lzc_destroy_snaps(nv, defer, NULL);
3877                 fnvlist_free(nv);
3878         } else {
3879                 error = lzc_destroy(zhp->zfs_name);
3880         }
3881
3882         if (error != 0 && error != ENOENT) {
3883                 return (zfs_standard_error_fmt(zhp->zfs_hdl, errno,
3884                     dgettext(TEXT_DOMAIN, "cannot destroy '%s'"),
3885                     zhp->zfs_name));
3886         }
3887
3888         remove_mountpoint(zhp);
3889
3890         return (0);
3891 }
3892
3893 struct destroydata {
3894         nvlist_t *nvl;
3895         const char *snapname;
3896 };
3897
3898 static int
3899 zfs_check_snap_cb(zfs_handle_t *zhp, void *arg)
3900 {
3901         struct destroydata *dd = arg;
3902         char name[ZFS_MAX_DATASET_NAME_LEN];
3903         int rv = 0;
3904
3905         if (snprintf(name, sizeof (name), "%s@%s", zhp->zfs_name,
3906             dd->snapname) >= sizeof (name))
3907                 return (EINVAL);
3908
3909         if (lzc_exists(name))
3910                 verify(nvlist_add_boolean(dd->nvl, name) == 0);
3911
3912         rv = zfs_iter_filesystems(zhp, zfs_check_snap_cb, dd);
3913         zfs_close(zhp);
3914         return (rv);
3915 }
3916
3917 /*
3918  * Destroys all snapshots with the given name in zhp & descendants.
3919  */
3920 int
3921 zfs_destroy_snaps(zfs_handle_t *zhp, char *snapname, boolean_t defer)
3922 {
3923         int ret;
3924         struct destroydata dd = { 0 };
3925
3926         dd.snapname = snapname;
3927         verify(nvlist_alloc(&dd.nvl, NV_UNIQUE_NAME, 0) == 0);
3928         (void) zfs_check_snap_cb(zfs_handle_dup(zhp), &dd);
3929
3930         if (nvlist_empty(dd.nvl)) {
3931                 ret = zfs_standard_error_fmt(zhp->zfs_hdl, ENOENT,
3932                     dgettext(TEXT_DOMAIN, "cannot destroy '%s@%s'"),
3933                     zhp->zfs_name, snapname);
3934         } else {
3935                 ret = zfs_destroy_snaps_nvl(zhp->zfs_hdl, dd.nvl, defer);
3936         }
3937         nvlist_free(dd.nvl);
3938         return (ret);
3939 }
3940
3941 /*
3942  * Destroys all the snapshots named in the nvlist.
3943  */
3944 int
3945 zfs_destroy_snaps_nvl(libzfs_handle_t *hdl, nvlist_t *snaps, boolean_t defer)
3946 {
3947         int ret;
3948         nvlist_t *errlist = NULL;
3949         nvpair_t *pair;
3950
3951         ret = lzc_destroy_snaps(snaps, defer, &errlist);
3952
3953         if (ret == 0) {
3954                 nvlist_free(errlist);
3955                 return (0);
3956         }
3957
3958         if (nvlist_empty(errlist)) {
3959                 char errbuf[1024];
3960                 (void) snprintf(errbuf, sizeof (errbuf),
3961                     dgettext(TEXT_DOMAIN, "cannot destroy snapshots"));
3962
3963                 ret = zfs_standard_error(hdl, ret, errbuf);
3964         }
3965         for (pair = nvlist_next_nvpair(errlist, NULL);
3966             pair != NULL; pair = nvlist_next_nvpair(errlist, pair)) {
3967                 char errbuf[1024];
3968                 (void) snprintf(errbuf, sizeof (errbuf),
3969                     dgettext(TEXT_DOMAIN, "cannot destroy snapshot %s"),
3970                     nvpair_name(pair));
3971
3972                 switch (fnvpair_value_int32(pair)) {
3973                 case EEXIST:
3974                         zfs_error_aux(hdl,
3975                             dgettext(TEXT_DOMAIN, "snapshot is cloned"));
3976                         ret = zfs_error(hdl, EZFS_EXISTS, errbuf);
3977                         break;
3978                 default:
3979                         ret = zfs_standard_error(hdl, errno, errbuf);
3980                         break;
3981                 }
3982         }
3983
3984         nvlist_free(errlist);
3985         return (ret);
3986 }
3987
3988 /*
3989  * Clones the given dataset.  The target must be of the same type as the source.
3990  */
3991 int
3992 zfs_clone(zfs_handle_t *zhp, const char *target, nvlist_t *props)
3993 {
3994         char parent[ZFS_MAX_DATASET_NAME_LEN];
3995         int ret;
3996         char errbuf[1024];
3997         libzfs_handle_t *hdl = zhp->zfs_hdl;
3998         uint64_t zoned;
3999
4000         assert(zhp->zfs_type == ZFS_TYPE_SNAPSHOT);
4001
4002         (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
4003             "cannot create '%s'"), target);
4004
4005         /* validate the target/clone name */
4006         if (!zfs_validate_name(hdl, target, ZFS_TYPE_FILESYSTEM, B_TRUE))
4007                 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
4008
4009         /* validate parents exist */
4010         if (check_parents(hdl, target, &zoned, B_FALSE, NULL) != 0)
4011                 return (-1);
4012
4013         (void) parent_name(target, parent, sizeof (parent));
4014
4015         /* do the clone */
4016
4017         if (props) {
4018                 zfs_type_t type;
4019
4020                 if (ZFS_IS_VOLUME(zhp)) {
4021                         type = ZFS_TYPE_VOLUME;
4022                 } else {
4023                         type = ZFS_TYPE_FILESYSTEM;
4024                 }
4025                 if ((props = zfs_valid_proplist(hdl, type, props, zoned,
4026                     zhp, zhp->zpool_hdl, B_TRUE, errbuf)) == NULL)
4027                         return (-1);
4028                 if (zfs_fix_auto_resv(zhp, props) == -1) {
4029                         nvlist_free(props);
4030                         return (-1);
4031                 }
4032         }
4033
4034         if (zfs_crypto_clone_check(hdl, zhp, parent, props) != 0) {
4035                 nvlist_free(props);
4036                 return (zfs_error(hdl, EZFS_CRYPTOFAILED, errbuf));
4037         }
4038
4039         ret = lzc_clone(target, zhp->zfs_name, props);
4040         nvlist_free(props);
4041
4042         if (ret != 0) {
4043                 switch (errno) {
4044
4045                 case ENOENT:
4046                         /*
4047                          * The parent doesn't exist.  We should have caught this
4048                          * above, but there may a race condition that has since
4049                          * destroyed the parent.
4050                          *
4051                          * At this point, we don't know whether it's the source
4052                          * that doesn't exist anymore, or whether the target
4053                          * dataset doesn't exist.
4054                          */
4055                         zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN,
4056                             "no such parent '%s'"), parent);
4057                         return (zfs_error(zhp->zfs_hdl, EZFS_NOENT, errbuf));
4058
4059                 case EXDEV:
4060                         zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN,
4061                             "source and target pools differ"));
4062                         return (zfs_error(zhp->zfs_hdl, EZFS_CROSSTARGET,
4063                             errbuf));
4064
4065                 default:
4066                         return (zfs_standard_error(zhp->zfs_hdl, errno,
4067                             errbuf));
4068                 }
4069         }
4070
4071         return (ret);
4072 }
4073
4074 /*
4075  * Promotes the given clone fs to be the clone parent.
4076  */
4077 int
4078 zfs_promote(zfs_handle_t *zhp)
4079 {
4080         libzfs_handle_t *hdl = zhp->zfs_hdl;
4081         char snapname[ZFS_MAX_DATASET_NAME_LEN];
4082         int ret;
4083         char errbuf[1024];
4084
4085         (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
4086             "cannot promote '%s'"), zhp->zfs_name);
4087
4088         if (zhp->zfs_type == ZFS_TYPE_SNAPSHOT) {
4089                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4090                     "snapshots can not be promoted"));
4091                 return (zfs_error(hdl, EZFS_BADTYPE, errbuf));
4092         }
4093
4094         if (zhp->zfs_dmustats.dds_origin[0] == '\0') {
4095                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4096                     "not a cloned filesystem"));
4097                 return (zfs_error(hdl, EZFS_BADTYPE, errbuf));
4098         }
4099
4100         if (!zfs_validate_name(hdl, zhp->zfs_name, zhp->zfs_type, B_TRUE))
4101                 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
4102
4103         ret = lzc_promote(zhp->zfs_name, snapname, sizeof (snapname));
4104
4105         if (ret != 0) {
4106                 switch (ret) {
4107                 case EEXIST:
4108                         /* There is a conflicting snapshot name. */
4109                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4110                             "conflicting snapshot '%s' from parent '%s'"),
4111                             snapname, zhp->zfs_dmustats.dds_origin);
4112                         return (zfs_error(hdl, EZFS_EXISTS, errbuf));
4113
4114                 default:
4115                         return (zfs_standard_error(hdl, ret, errbuf));
4116                 }
4117         }
4118         return (ret);
4119 }
4120
4121 typedef struct snapdata {
4122         nvlist_t *sd_nvl;
4123         const char *sd_snapname;
4124 } snapdata_t;
4125
4126 static int
4127 zfs_snapshot_cb(zfs_handle_t *zhp, void *arg)
4128 {
4129         snapdata_t *sd = arg;
4130         char name[ZFS_MAX_DATASET_NAME_LEN];
4131         int rv = 0;
4132
4133         if (zfs_prop_get_int(zhp, ZFS_PROP_INCONSISTENT) == 0) {
4134                 if (snprintf(name, sizeof (name), "%s@%s", zfs_get_name(zhp),
4135                     sd->sd_snapname) >= sizeof (name))
4136                         return (EINVAL);
4137
4138                 fnvlist_add_boolean(sd->sd_nvl, name);
4139
4140                 rv = zfs_iter_filesystems(zhp, zfs_snapshot_cb, sd);
4141         }
4142         zfs_close(zhp);
4143
4144         return (rv);
4145 }
4146
4147 int
4148 zfs_remap_indirects(libzfs_handle_t *hdl, const char *fs)
4149 {
4150         int err;
4151         char errbuf[1024];
4152
4153         (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
4154             "cannot remap dataset '%s'"), fs);
4155
4156         err = lzc_remap(fs);
4157
4158         if (err != 0) {
4159                 switch (err) {
4160                 case ENOTSUP:
4161                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4162                             "pool must be upgraded"));
4163                         (void) zfs_error(hdl, EZFS_BADVERSION, errbuf);
4164                         break;
4165                 case EINVAL:
4166                         (void) zfs_error(hdl, EZFS_BADTYPE, errbuf);
4167                         break;
4168                 default:
4169                         (void) zfs_standard_error(hdl, err, errbuf);
4170                         break;
4171                 }
4172         }
4173
4174         return (err);
4175 }
4176
4177 /*
4178  * Creates snapshots.  The keys in the snaps nvlist are the snapshots to be
4179  * created.
4180  */
4181 int
4182 zfs_snapshot_nvl(libzfs_handle_t *hdl, nvlist_t *snaps, nvlist_t *props)
4183 {
4184         int ret;
4185         char errbuf[1024];
4186         nvpair_t *elem;
4187         nvlist_t *errors;
4188         zpool_handle_t *zpool_hdl;
4189         char pool[ZFS_MAX_DATASET_NAME_LEN];
4190
4191         (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
4192             "cannot create snapshots "));
4193
4194         elem = NULL;
4195         while ((elem = nvlist_next_nvpair(snaps, elem)) != NULL) {
4196                 const char *snapname = nvpair_name(elem);
4197
4198                 /* validate the target name */
4199                 if (!zfs_validate_name(hdl, snapname, ZFS_TYPE_SNAPSHOT,
4200                     B_TRUE)) {
4201                         (void) snprintf(errbuf, sizeof (errbuf),
4202                             dgettext(TEXT_DOMAIN,
4203                             "cannot create snapshot '%s'"), snapname);
4204                         return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
4205                 }
4206         }
4207
4208         /*
4209          * get pool handle for prop validation. assumes all snaps are in the
4210          * same pool, as does lzc_snapshot (below).
4211          */
4212         elem = nvlist_next_nvpair(snaps, NULL);
4213         (void) strlcpy(pool, nvpair_name(elem), sizeof (pool));
4214         pool[strcspn(pool, "/@")] = '\0';
4215         zpool_hdl = zpool_open(hdl, pool);
4216         if (zpool_hdl == NULL)
4217                 return (-1);
4218
4219         if (props != NULL &&
4220             (props = zfs_valid_proplist(hdl, ZFS_TYPE_SNAPSHOT,
4221             props, B_FALSE, NULL, zpool_hdl, B_FALSE, errbuf)) == NULL) {
4222                 zpool_close(zpool_hdl);
4223                 return (-1);
4224         }
4225         zpool_close(zpool_hdl);
4226
4227         ret = lzc_snapshot(snaps, props, &errors);
4228
4229         if (ret != 0) {
4230                 boolean_t printed = B_FALSE;
4231                 for (elem = nvlist_next_nvpair(errors, NULL);
4232                     elem != NULL;
4233                     elem = nvlist_next_nvpair(errors, elem)) {
4234                         (void) snprintf(errbuf, sizeof (errbuf),
4235                             dgettext(TEXT_DOMAIN,
4236                             "cannot create snapshot '%s'"), nvpair_name(elem));
4237                         (void) zfs_standard_error(hdl,
4238                             fnvpair_value_int32(elem), errbuf);
4239                         printed = B_TRUE;
4240                 }
4241                 if (!printed) {
4242                         switch (ret) {
4243                         case EXDEV:
4244                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4245                                     "multiple snapshots of same "
4246                                     "fs not allowed"));
4247                                 (void) zfs_error(hdl, EZFS_EXISTS, errbuf);
4248
4249                                 break;
4250                         default:
4251                                 (void) zfs_standard_error(hdl, ret, errbuf);
4252                         }
4253                 }
4254         }
4255
4256         nvlist_free(props);
4257         nvlist_free(errors);
4258         return (ret);
4259 }
4260
4261 int
4262 zfs_snapshot(libzfs_handle_t *hdl, const char *path, boolean_t recursive,
4263     nvlist_t *props)
4264 {
4265         int ret;
4266         snapdata_t sd = { 0 };
4267         char fsname[ZFS_MAX_DATASET_NAME_LEN];
4268         char *cp;
4269         zfs_handle_t *zhp;
4270         char errbuf[1024];
4271
4272         (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
4273             "cannot snapshot %s"), path);
4274
4275         if (!zfs_validate_name(hdl, path, ZFS_TYPE_SNAPSHOT, B_TRUE))
4276                 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
4277
4278         (void) strlcpy(fsname, path, sizeof (fsname));
4279         cp = strchr(fsname, '@');
4280         *cp = '\0';
4281         sd.sd_snapname = cp + 1;
4282
4283         if ((zhp = zfs_open(hdl, fsname, ZFS_TYPE_FILESYSTEM |
4284             ZFS_TYPE_VOLUME)) == NULL) {
4285                 return (-1);
4286         }
4287
4288         verify(nvlist_alloc(&sd.sd_nvl, NV_UNIQUE_NAME, 0) == 0);
4289         if (recursive) {
4290                 (void) zfs_snapshot_cb(zfs_handle_dup(zhp), &sd);
4291         } else {
4292                 fnvlist_add_boolean(sd.sd_nvl, path);
4293         }
4294
4295         ret = zfs_snapshot_nvl(hdl, sd.sd_nvl, props);
4296         nvlist_free(sd.sd_nvl);
4297         zfs_close(zhp);
4298         return (ret);
4299 }
4300
4301 /*
4302  * Destroy any more recent snapshots.  We invoke this callback on any dependents
4303  * of the snapshot first.  If the 'cb_dependent' member is non-zero, then this
4304  * is a dependent and we should just destroy it without checking the transaction
4305  * group.
4306  */
4307 typedef struct rollback_data {
4308         const char      *cb_target;             /* the snapshot */
4309         uint64_t        cb_create;              /* creation time reference */
4310         boolean_t       cb_error;
4311         boolean_t       cb_force;
4312 } rollback_data_t;
4313
4314 static int
4315 rollback_destroy_dependent(zfs_handle_t *zhp, void *data)
4316 {
4317         rollback_data_t *cbp = data;
4318         prop_changelist_t *clp;
4319
4320         /* We must destroy this clone; first unmount it */
4321         clp = changelist_gather(zhp, ZFS_PROP_NAME, 0,
4322             cbp->cb_force ? MS_FORCE: 0);
4323         if (clp == NULL || changelist_prefix(clp) != 0) {
4324                 cbp->cb_error = B_TRUE;
4325                 zfs_close(zhp);
4326                 return (0);
4327         }
4328         if (zfs_destroy(zhp, B_FALSE) != 0)
4329                 cbp->cb_error = B_TRUE;
4330         else
4331                 changelist_remove(clp, zhp->zfs_name);
4332         (void) changelist_postfix(clp);
4333         changelist_free(clp);
4334
4335         zfs_close(zhp);
4336         return (0);
4337 }
4338
4339 static int
4340 rollback_destroy(zfs_handle_t *zhp, void *data)
4341 {
4342         rollback_data_t *cbp = data;
4343
4344         if (zfs_prop_get_int(zhp, ZFS_PROP_CREATETXG) > cbp->cb_create) {
4345                 cbp->cb_error |= zfs_iter_dependents(zhp, B_FALSE,
4346                     rollback_destroy_dependent, cbp);
4347
4348                 cbp->cb_error |= zfs_destroy(zhp, B_FALSE);
4349         }
4350
4351         zfs_close(zhp);
4352         return (0);
4353 }
4354
4355 /*
4356  * Given a dataset, rollback to a specific snapshot, discarding any
4357  * data changes since then and making it the active dataset.
4358  *
4359  * Any snapshots and bookmarks more recent than the target are
4360  * destroyed, along with their dependents (i.e. clones).
4361  */
4362 int
4363 zfs_rollback(zfs_handle_t *zhp, zfs_handle_t *snap, boolean_t force)
4364 {
4365         rollback_data_t cb = { 0 };
4366         int err;
4367         boolean_t restore_resv = 0;
4368         uint64_t old_volsize = 0, new_volsize;
4369         zfs_prop_t resv_prop = { 0 };
4370         uint64_t min_txg = 0;
4371
4372         assert(zhp->zfs_type == ZFS_TYPE_FILESYSTEM ||
4373             zhp->zfs_type == ZFS_TYPE_VOLUME);
4374
4375         /*
4376          * Destroy all recent snapshots and their dependents.
4377          */
4378         cb.cb_force = force;
4379         cb.cb_target = snap->zfs_name;
4380         cb.cb_create = zfs_prop_get_int(snap, ZFS_PROP_CREATETXG);
4381
4382         if (cb.cb_create > 0)
4383                 min_txg = cb.cb_create;
4384
4385         (void) zfs_iter_snapshots(zhp, B_FALSE, rollback_destroy, &cb,
4386             min_txg, 0);
4387
4388         (void) zfs_iter_bookmarks(zhp, rollback_destroy, &cb);
4389
4390         if (cb.cb_error)
4391                 return (-1);
4392
4393         /*
4394          * Now that we have verified that the snapshot is the latest,
4395          * rollback to the given snapshot.
4396          */
4397
4398         if (zhp->zfs_type == ZFS_TYPE_VOLUME) {
4399                 if (zfs_which_resv_prop(zhp, &resv_prop) < 0)
4400                         return (-1);
4401                 old_volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE);
4402                 restore_resv =
4403                     (old_volsize == zfs_prop_get_int(zhp, resv_prop));
4404         }
4405
4406         /*
4407          * Pass both the filesystem and the wanted snapshot names,
4408          * we would get an error back if the snapshot is destroyed or
4409          * a new snapshot is created before this request is processed.
4410          */
4411         err = lzc_rollback_to(zhp->zfs_name, snap->zfs_name);
4412         if (err != 0) {
4413                 char errbuf[1024];
4414
4415                 (void) snprintf(errbuf, sizeof (errbuf),
4416                     dgettext(TEXT_DOMAIN, "cannot rollback '%s'"),
4417                     zhp->zfs_name);
4418                 switch (err) {
4419                 case EEXIST:
4420                         zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN,
4421                             "there is a snapshot or bookmark more recent "
4422                             "than '%s'"), snap->zfs_name);
4423                         (void) zfs_error(zhp->zfs_hdl, EZFS_EXISTS, errbuf);
4424                         break;
4425                 case ESRCH:
4426                         zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN,
4427                             "'%s' is not found among snapshots of '%s'"),
4428                             snap->zfs_name, zhp->zfs_name);
4429                         (void) zfs_error(zhp->zfs_hdl, EZFS_NOENT, errbuf);
4430                         break;
4431                 case EINVAL:
4432                         (void) zfs_error(zhp->zfs_hdl, EZFS_BADTYPE, errbuf);
4433                         break;
4434                 default:
4435                         (void) zfs_standard_error(zhp->zfs_hdl, err, errbuf);
4436                 }
4437                 return (err);
4438         }
4439
4440         /*
4441          * For volumes, if the pre-rollback volsize matched the pre-
4442          * rollback reservation and the volsize has changed then set
4443          * the reservation property to the post-rollback volsize.
4444          * Make a new handle since the rollback closed the dataset.
4445          */
4446         if ((zhp->zfs_type == ZFS_TYPE_VOLUME) &&
4447             (zhp = make_dataset_handle(zhp->zfs_hdl, zhp->zfs_name))) {
4448                 if (restore_resv) {
4449                         new_volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE);
4450                         if (old_volsize != new_volsize)
4451                                 err = zfs_prop_set_int(zhp, resv_prop,
4452                                     new_volsize);
4453                 }
4454                 zfs_close(zhp);
4455         }
4456         return (err);
4457 }
4458
4459 /*
4460  * Renames the given dataset.
4461  */
4462 int
4463 zfs_rename(zfs_handle_t *zhp, const char *target, boolean_t recursive,
4464     boolean_t force_unmount)
4465 {
4466         int ret = 0;
4467         zfs_cmd_t zc = {"\0"};
4468         char *delim;
4469         prop_changelist_t *cl = NULL;
4470         zfs_handle_t *zhrp = NULL;
4471         char *parentname = NULL;
4472         char parent[ZFS_MAX_DATASET_NAME_LEN];
4473         libzfs_handle_t *hdl = zhp->zfs_hdl;
4474         char errbuf[1024];
4475
4476         /* if we have the same exact name, just return success */
4477         if (strcmp(zhp->zfs_name, target) == 0)
4478                 return (0);
4479
4480         (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
4481             "cannot rename to '%s'"), target);
4482
4483         /* make sure source name is valid */
4484         if (!zfs_validate_name(hdl, zhp->zfs_name, zhp->zfs_type, B_TRUE))
4485                 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
4486
4487         /*
4488          * Make sure the target name is valid
4489          */
4490         if (zhp->zfs_type == ZFS_TYPE_SNAPSHOT) {
4491                 if ((strchr(target, '@') == NULL) ||
4492                     *target == '@') {
4493                         /*
4494                          * Snapshot target name is abbreviated,
4495                          * reconstruct full dataset name
4496                          */
4497                         (void) strlcpy(parent, zhp->zfs_name,
4498                             sizeof (parent));
4499                         delim = strchr(parent, '@');
4500                         if (strchr(target, '@') == NULL)
4501                                 *(++delim) = '\0';
4502                         else
4503                                 *delim = '\0';
4504                         (void) strlcat(parent, target, sizeof (parent));
4505                         target = parent;
4506                 } else {
4507                         /*
4508                          * Make sure we're renaming within the same dataset.
4509                          */
4510                         delim = strchr(target, '@');
4511                         if (strncmp(zhp->zfs_name, target, delim - target)
4512                             != 0 || zhp->zfs_name[delim - target] != '@') {
4513                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4514                                     "snapshots must be part of same "
4515                                     "dataset"));
4516                                 return (zfs_error(hdl, EZFS_CROSSTARGET,
4517                                     errbuf));
4518                         }
4519                 }
4520
4521                 if (!zfs_validate_name(hdl, target, zhp->zfs_type, B_TRUE))
4522                         return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
4523         } else {
4524                 if (recursive) {
4525                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4526                             "recursive rename must be a snapshot"));
4527                         return (zfs_error(hdl, EZFS_BADTYPE, errbuf));
4528                 }
4529
4530                 if (!zfs_validate_name(hdl, target, zhp->zfs_type, B_TRUE))
4531                         return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
4532
4533                 /* validate parents */
4534                 if (check_parents(hdl, target, NULL, B_FALSE, NULL) != 0)
4535                         return (-1);
4536
4537                 /* make sure we're in the same pool */
4538                 verify((delim = strchr(target, '/')) != NULL);
4539                 if (strncmp(zhp->zfs_name, target, delim - target) != 0 ||
4540                     zhp->zfs_name[delim - target] != '/') {
4541                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4542                             "datasets must be within same pool"));
4543                         return (zfs_error(hdl, EZFS_CROSSTARGET, errbuf));
4544                 }
4545
4546                 /* new name cannot be a child of the current dataset name */
4547                 if (is_descendant(zhp->zfs_name, target)) {
4548                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4549                             "New dataset name cannot be a descendant of "
4550                             "current dataset name"));
4551                         return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
4552                 }
4553         }
4554
4555         (void) snprintf(errbuf, sizeof (errbuf),
4556             dgettext(TEXT_DOMAIN, "cannot rename '%s'"), zhp->zfs_name);
4557
4558         if (getzoneid() == GLOBAL_ZONEID &&
4559             zfs_prop_get_int(zhp, ZFS_PROP_ZONED)) {
4560                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4561                     "dataset is used in a non-global zone"));
4562                 return (zfs_error(hdl, EZFS_ZONED, errbuf));
4563         }
4564
4565         if (recursive) {
4566                 parentname = zfs_strdup(zhp->zfs_hdl, zhp->zfs_name);
4567                 if (parentname == NULL) {
4568                         ret = -1;
4569                         goto error;
4570                 }
4571                 delim = strchr(parentname, '@');
4572                 *delim = '\0';
4573                 zhrp = zfs_open(zhp->zfs_hdl, parentname, ZFS_TYPE_DATASET);
4574                 if (zhrp == NULL) {
4575                         ret = -1;
4576                         goto error;
4577                 }
4578         } else if (zhp->zfs_type != ZFS_TYPE_SNAPSHOT) {
4579                 if ((cl = changelist_gather(zhp, ZFS_PROP_NAME,
4580                     CL_GATHER_ITER_MOUNTED,
4581                     force_unmount ? MS_FORCE : 0)) == NULL)
4582                         return (-1);
4583
4584                 if (changelist_haszonedchild(cl)) {
4585                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4586                             "child dataset with inherited mountpoint is used "
4587                             "in a non-global zone"));
4588                         (void) zfs_error(hdl, EZFS_ZONED, errbuf);
4589                         ret = -1;
4590                         goto error;
4591                 }
4592
4593                 if ((ret = changelist_prefix(cl)) != 0)
4594                         goto error;
4595         }
4596
4597         if (ZFS_IS_VOLUME(zhp))
4598                 zc.zc_objset_type = DMU_OST_ZVOL;
4599         else
4600                 zc.zc_objset_type = DMU_OST_ZFS;
4601
4602         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
4603         (void) strlcpy(zc.zc_value, target, sizeof (zc.zc_value));
4604
4605         zc.zc_cookie = recursive;
4606
4607         if ((ret = zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_RENAME, &zc)) != 0) {
4608                 /*
4609                  * if it was recursive, the one that actually failed will
4610                  * be in zc.zc_name
4611                  */
4612                 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
4613                     "cannot rename '%s'"), zc.zc_name);
4614
4615                 if (recursive && errno == EEXIST) {
4616                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4617                             "a child dataset already has a snapshot "
4618                             "with the new name"));
4619                         (void) zfs_error(hdl, EZFS_EXISTS, errbuf);
4620                 } else if (errno == EACCES) {
4621                         if (zfs_prop_get_int(zhp, ZFS_PROP_ENCRYPTION) ==
4622                             ZIO_CRYPT_OFF) {
4623                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4624                                     "cannot rename an unencrypted dataset to "
4625                                     "be a decendent of an encrypted one"));
4626                         } else {
4627                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4628                                     "cannot move encryption child outside of "
4629                                     "its encryption root"));
4630                         }
4631                         (void) zfs_error(hdl, EZFS_CRYPTOFAILED, errbuf);
4632                 } else {
4633                         (void) zfs_standard_error(zhp->zfs_hdl, errno, errbuf);
4634                 }
4635
4636                 /*
4637                  * On failure, we still want to remount any filesystems that
4638                  * were previously mounted, so we don't alter the system state.
4639                  */
4640                 if (cl != NULL)
4641                         (void) changelist_postfix(cl);
4642         } else {
4643                 if (cl != NULL) {
4644                         changelist_rename(cl, zfs_get_name(zhp), target);
4645                         ret = changelist_postfix(cl);
4646                 }
4647         }
4648
4649 error:
4650         if (parentname != NULL) {
4651                 free(parentname);
4652         }
4653         if (zhrp != NULL) {
4654                 zfs_close(zhrp);
4655         }
4656         if (cl != NULL) {
4657                 changelist_free(cl);
4658         }
4659         return (ret);
4660 }
4661
4662 nvlist_t *
4663 zfs_get_all_props(zfs_handle_t *zhp)
4664 {
4665         return (zhp->zfs_props);
4666 }
4667
4668 nvlist_t *
4669 zfs_get_recvd_props(zfs_handle_t *zhp)
4670 {
4671         if (zhp->zfs_recvd_props == NULL)
4672                 if (get_recvd_props_ioctl(zhp) != 0)
4673                         return (NULL);
4674         return (zhp->zfs_recvd_props);
4675 }
4676
4677 nvlist_t *
4678 zfs_get_user_props(zfs_handle_t *zhp)
4679 {
4680         return (zhp->zfs_user_props);
4681 }
4682
4683 /*
4684  * This function is used by 'zfs list' to determine the exact set of columns to
4685  * display, and their maximum widths.  This does two main things:
4686  *
4687  *      - If this is a list of all properties, then expand the list to include
4688  *        all native properties, and set a flag so that for each dataset we look
4689  *        for new unique user properties and add them to the list.
4690  *
4691  *      - For non fixed-width properties, keep track of the maximum width seen
4692  *        so that we can size the column appropriately. If the user has
4693  *        requested received property values, we also need to compute the width
4694  *        of the RECEIVED column.
4695  */
4696 int
4697 zfs_expand_proplist(zfs_handle_t *zhp, zprop_list_t **plp, boolean_t received,
4698     boolean_t literal)
4699 {
4700         libzfs_handle_t *hdl = zhp->zfs_hdl;
4701         zprop_list_t *entry;
4702         zprop_list_t **last, **start;
4703         nvlist_t *userprops, *propval;
4704         nvpair_t *elem;
4705         char *strval;
4706         char buf[ZFS_MAXPROPLEN];
4707
4708         if (zprop_expand_list(hdl, plp, ZFS_TYPE_DATASET) != 0)
4709                 return (-1);
4710
4711         userprops = zfs_get_user_props(zhp);
4712
4713         entry = *plp;
4714         if (entry->pl_all && nvlist_next_nvpair(userprops, NULL) != NULL) {
4715                 /*
4716                  * Go through and add any user properties as necessary.  We
4717                  * start by incrementing our list pointer to the first
4718                  * non-native property.
4719                  */
4720                 start = plp;
4721                 while (*start != NULL) {
4722                         if ((*start)->pl_prop == ZPROP_INVAL)
4723                                 break;
4724                         start = &(*start)->pl_next;
4725                 }
4726
4727                 elem = NULL;
4728                 while ((elem = nvlist_next_nvpair(userprops, elem)) != NULL) {
4729                         /*
4730                          * See if we've already found this property in our list.
4731                          */
4732                         for (last = start; *last != NULL;
4733                             last = &(*last)->pl_next) {
4734                                 if (strcmp((*last)->pl_user_prop,
4735                                     nvpair_name(elem)) == 0)
4736                                         break;
4737                         }
4738
4739                         if (*last == NULL) {
4740                                 if ((entry = zfs_alloc(hdl,
4741                                     sizeof (zprop_list_t))) == NULL ||
4742                                     ((entry->pl_user_prop = zfs_strdup(hdl,
4743                                     nvpair_name(elem)))) == NULL) {
4744                                         free(entry);
4745                                         return (-1);
4746                                 }
4747
4748                                 entry->pl_prop = ZPROP_INVAL;
4749                                 entry->pl_width = strlen(nvpair_name(elem));
4750                                 entry->pl_all = B_TRUE;
4751                                 *last = entry;
4752                         }
4753                 }
4754         }
4755
4756         /*
4757          * Now go through and check the width of any non-fixed columns
4758          */
4759         for (entry = *plp; entry != NULL; entry = entry->pl_next) {
4760                 if (entry->pl_fixed && !literal)
4761                         continue;
4762
4763                 if (entry->pl_prop != ZPROP_INVAL) {
4764                         if (zfs_prop_get(zhp, entry->pl_prop,
4765                             buf, sizeof (buf), NULL, NULL, 0, literal) == 0) {
4766                                 if (strlen(buf) > entry->pl_width)
4767                                         entry->pl_width = strlen(buf);
4768                         }
4769                         if (received && zfs_prop_get_recvd(zhp,
4770                             zfs_prop_to_name(entry->pl_prop),
4771                             buf, sizeof (buf), literal) == 0)
4772                                 if (strlen(buf) > entry->pl_recvd_width)
4773                                         entry->pl_recvd_width = strlen(buf);
4774                 } else {
4775                         if (nvlist_lookup_nvlist(userprops, entry->pl_user_prop,
4776                             &propval) == 0) {
4777                                 verify(nvlist_lookup_string(propval,
4778                                     ZPROP_VALUE, &strval) == 0);
4779                                 if (strlen(strval) > entry->pl_width)
4780                                         entry->pl_width = strlen(strval);
4781                         }
4782                         if (received && zfs_prop_get_recvd(zhp,
4783                             entry->pl_user_prop,
4784                             buf, sizeof (buf), literal) == 0)
4785                                 if (strlen(buf) > entry->pl_recvd_width)
4786                                         entry->pl_recvd_width = strlen(buf);
4787                 }
4788         }
4789
4790         return (0);
4791 }
4792
4793 void
4794 zfs_prune_proplist(zfs_handle_t *zhp, uint8_t *props)
4795 {
4796         nvpair_t *curr;
4797         nvpair_t *next;
4798
4799         /*
4800          * Keep a reference to the props-table against which we prune the
4801          * properties.
4802          */
4803         zhp->zfs_props_table = props;
4804
4805         curr = nvlist_next_nvpair(zhp->zfs_props, NULL);
4806
4807         while (curr) {
4808                 zfs_prop_t zfs_prop = zfs_name_to_prop(nvpair_name(curr));
4809                 next = nvlist_next_nvpair(zhp->zfs_props, curr);
4810
4811                 /*
4812                  * User properties will result in ZPROP_INVAL, and since we
4813                  * only know how to prune standard ZFS properties, we always
4814                  * leave these in the list.  This can also happen if we
4815                  * encounter an unknown DSL property (when running older
4816                  * software, for example).
4817                  */
4818                 if (zfs_prop != ZPROP_INVAL && props[zfs_prop] == B_FALSE)
4819                         (void) nvlist_remove(zhp->zfs_props,
4820                             nvpair_name(curr), nvpair_type(curr));
4821                 curr = next;
4822         }
4823 }
4824
4825 static int
4826 zfs_smb_acl_mgmt(libzfs_handle_t *hdl, char *dataset, char *path,
4827     zfs_smb_acl_op_t cmd, char *resource1, char *resource2)
4828 {
4829         zfs_cmd_t zc = {"\0"};
4830         nvlist_t *nvlist = NULL;
4831         int error;
4832
4833         (void) strlcpy(zc.zc_name, dataset, sizeof (zc.zc_name));
4834         (void) strlcpy(zc.zc_value, path, sizeof (zc.zc_value));
4835         zc.zc_cookie = (uint64_t)cmd;
4836
4837         if (cmd == ZFS_SMB_ACL_RENAME) {
4838                 if (nvlist_alloc(&nvlist, NV_UNIQUE_NAME, 0) != 0) {
4839                         (void) no_memory(hdl);
4840                         return (0);
4841                 }
4842         }
4843
4844         switch (cmd) {
4845         case ZFS_SMB_ACL_ADD:
4846         case ZFS_SMB_ACL_REMOVE:
4847                 (void) strlcpy(zc.zc_string, resource1, sizeof (zc.zc_string));
4848                 break;
4849         case ZFS_SMB_ACL_RENAME:
4850                 if (nvlist_add_string(nvlist, ZFS_SMB_ACL_SRC,
4851                     resource1) != 0) {
4852                                 (void) no_memory(hdl);
4853                                 return (-1);
4854                 }
4855                 if (nvlist_add_string(nvlist, ZFS_SMB_ACL_TARGET,
4856                     resource2) != 0) {
4857                                 (void) no_memory(hdl);
4858                                 return (-1);
4859                 }
4860                 if (zcmd_write_src_nvlist(hdl, &zc, nvlist) != 0) {
4861                         nvlist_free(nvlist);
4862                         return (-1);
4863                 }
4864                 break;
4865         case ZFS_SMB_ACL_PURGE:
4866                 break;
4867         default:
4868                 return (-1);
4869         }
4870         error = ioctl(hdl->libzfs_fd, ZFS_IOC_SMB_ACL, &zc);
4871         nvlist_free(nvlist);
4872         return (error);
4873 }
4874
4875 int
4876 zfs_smb_acl_add(libzfs_handle_t *hdl, char *dataset,
4877     char *path, char *resource)
4878 {
4879         return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_ADD,
4880             resource, NULL));
4881 }
4882
4883 int
4884 zfs_smb_acl_remove(libzfs_handle_t *hdl, char *dataset,
4885     char *path, char *resource)
4886 {
4887         return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_REMOVE,
4888             resource, NULL));
4889 }
4890
4891 int
4892 zfs_smb_acl_purge(libzfs_handle_t *hdl, char *dataset, char *path)
4893 {
4894         return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_PURGE,
4895             NULL, NULL));
4896 }
4897
4898 int
4899 zfs_smb_acl_rename(libzfs_handle_t *hdl, char *dataset, char *path,
4900     char *oldname, char *newname)
4901 {
4902         return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_RENAME,
4903             oldname, newname));
4904 }
4905
4906 int
4907 zfs_userspace(zfs_handle_t *zhp, zfs_userquota_prop_t type,
4908     zfs_userspace_cb_t func, void *arg)
4909 {
4910         zfs_cmd_t zc = {"\0"};
4911         zfs_useracct_t buf[100];
4912         libzfs_handle_t *hdl = zhp->zfs_hdl;
4913         int ret;
4914
4915         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
4916
4917         zc.zc_objset_type = type;
4918         zc.zc_nvlist_dst = (uintptr_t)buf;
4919
4920         for (;;) {
4921                 zfs_useracct_t *zua = buf;
4922
4923                 zc.zc_nvlist_dst_size = sizeof (buf);
4924                 if (zfs_ioctl(hdl, ZFS_IOC_USERSPACE_MANY, &zc) != 0) {
4925                         char errbuf[1024];
4926
4927                         if ((errno == ENOTSUP &&
4928                             (type == ZFS_PROP_USEROBJUSED ||
4929                             type == ZFS_PROP_GROUPOBJUSED ||
4930                             type == ZFS_PROP_USEROBJQUOTA ||
4931                             type == ZFS_PROP_GROUPOBJQUOTA ||
4932                             type == ZFS_PROP_PROJECTOBJUSED ||
4933                             type == ZFS_PROP_PROJECTOBJQUOTA ||
4934                             type == ZFS_PROP_PROJECTUSED ||
4935                             type == ZFS_PROP_PROJECTQUOTA)))
4936                                 break;
4937
4938                         (void) snprintf(errbuf, sizeof (errbuf),
4939                             dgettext(TEXT_DOMAIN,
4940                             "cannot get used/quota for %s"), zc.zc_name);
4941                         return (zfs_standard_error_fmt(hdl, errno, errbuf));
4942                 }
4943                 if (zc.zc_nvlist_dst_size == 0)
4944                         break;
4945
4946                 while (zc.zc_nvlist_dst_size > 0) {
4947                         if ((ret = func(arg, zua->zu_domain, zua->zu_rid,
4948                             zua->zu_space)) != 0)
4949                                 return (ret);
4950                         zua++;
4951                         zc.zc_nvlist_dst_size -= sizeof (zfs_useracct_t);
4952                 }
4953         }
4954
4955         return (0);
4956 }
4957
4958 struct holdarg {
4959         nvlist_t *nvl;
4960         const char *snapname;
4961         const char *tag;
4962         boolean_t recursive;
4963         int error;
4964 };
4965
4966 static int
4967 zfs_hold_one(zfs_handle_t *zhp, void *arg)
4968 {
4969         struct holdarg *ha = arg;
4970         char name[ZFS_MAX_DATASET_NAME_LEN];
4971         int rv = 0;
4972
4973         if (snprintf(name, sizeof (name), "%s@%s", zhp->zfs_name,
4974             ha->snapname) >= sizeof (name))
4975                 return (EINVAL);
4976
4977         if (lzc_exists(name))
4978                 fnvlist_add_string(ha->nvl, name, ha->tag);
4979
4980         if (ha->recursive)
4981                 rv = zfs_iter_filesystems(zhp, zfs_hold_one, ha);
4982         zfs_close(zhp);
4983         return (rv);
4984 }
4985
4986 int
4987 zfs_hold(zfs_handle_t *zhp, const char *snapname, const char *tag,
4988     boolean_t recursive, int cleanup_fd)
4989 {
4990         int ret;
4991         struct holdarg ha;
4992
4993         ha.nvl = fnvlist_alloc();
4994         ha.snapname = snapname;
4995         ha.tag = tag;
4996         ha.recursive = recursive;
4997         (void) zfs_hold_one(zfs_handle_dup(zhp), &ha);
4998
4999         if (nvlist_empty(ha.nvl)) {
5000                 char errbuf[1024];
5001
5002                 fnvlist_free(ha.nvl);
5003                 ret = ENOENT;
5004                 (void) snprintf(errbuf, sizeof (errbuf),
5005                     dgettext(TEXT_DOMAIN,
5006                     "cannot hold snapshot '%s@%s'"),
5007                     zhp->zfs_name, snapname);
5008                 (void) zfs_standard_error(zhp->zfs_hdl, ret, errbuf);
5009                 return (ret);
5010         }
5011
5012         ret = zfs_hold_nvl(zhp, cleanup_fd, ha.nvl);
5013         fnvlist_free(ha.nvl);
5014
5015         return (ret);
5016 }
5017
5018 int
5019 zfs_hold_nvl(zfs_handle_t *zhp, int cleanup_fd, nvlist_t *holds)
5020 {
5021         int ret;
5022         nvlist_t *errors;
5023         libzfs_handle_t *hdl = zhp->zfs_hdl;
5024         char errbuf[1024];
5025         nvpair_t *elem;
5026
5027         errors = NULL;
5028         ret = lzc_hold(holds, cleanup_fd, &errors);
5029
5030         if (ret == 0) {
5031                 /* There may be errors even in the success case. */
5032                 fnvlist_free(errors);
5033                 return (0);
5034         }
5035
5036         if (nvlist_empty(errors)) {
5037                 /* no hold-specific errors */
5038                 (void) snprintf(errbuf, sizeof (errbuf),
5039                     dgettext(TEXT_DOMAIN, "cannot hold"));
5040                 switch (ret) {
5041                 case ENOTSUP:
5042                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
5043                             "pool must be upgraded"));
5044                         (void) zfs_error(hdl, EZFS_BADVERSION, errbuf);
5045                         break;
5046                 case EINVAL:
5047                         (void) zfs_error(hdl, EZFS_BADTYPE, errbuf);
5048                         break;
5049                 default:
5050                         (void) zfs_standard_error(hdl, ret, errbuf);
5051                 }
5052         }
5053
5054         for (elem = nvlist_next_nvpair(errors, NULL);
5055             elem != NULL;
5056             elem = nvlist_next_nvpair(errors, elem)) {
5057                 (void) snprintf(errbuf, sizeof (errbuf),
5058                     dgettext(TEXT_DOMAIN,
5059                     "cannot hold snapshot '%s'"), nvpair_name(elem));
5060                 switch (fnvpair_value_int32(elem)) {
5061                 case E2BIG:
5062                         /*
5063                          * Temporary tags wind up having the ds object id
5064                          * prepended. So even if we passed the length check
5065                          * above, it's still possible for the tag to wind
5066                          * up being slightly too long.
5067                          */
5068                         (void) zfs_error(hdl, EZFS_TAGTOOLONG, errbuf);
5069                         break;
5070                 case EINVAL:
5071                         (void) zfs_error(hdl, EZFS_BADTYPE, errbuf);
5072                         break;
5073                 case EEXIST:
5074                         (void) zfs_error(hdl, EZFS_REFTAG_HOLD, errbuf);
5075                         break;
5076                 default:
5077                         (void) zfs_standard_error(hdl,
5078                             fnvpair_value_int32(elem), errbuf);
5079                 }
5080         }
5081
5082         fnvlist_free(errors);
5083         return (ret);
5084 }
5085
5086 static int
5087 zfs_release_one(zfs_handle_t *zhp, void *arg)
5088 {
5089         struct holdarg *ha = arg;
5090         char name[ZFS_MAX_DATASET_NAME_LEN];
5091         int rv = 0;
5092         nvlist_t *existing_holds;
5093
5094         if (snprintf(name, sizeof (name), "%s@%s", zhp->zfs_name,
5095             ha->snapname) >= sizeof (name)) {
5096                 ha->error = EINVAL;
5097                 rv = EINVAL;
5098         }
5099
5100         if (lzc_get_holds(name, &existing_holds) != 0) {
5101                 ha->error = ENOENT;
5102         } else if (!nvlist_exists(existing_holds, ha->tag)) {
5103                 ha->error = ESRCH;
5104         } else {
5105                 nvlist_t *torelease = fnvlist_alloc();
5106                 fnvlist_add_boolean(torelease, ha->tag);
5107                 fnvlist_add_nvlist(ha->nvl, name, torelease);
5108                 fnvlist_free(torelease);
5109         }
5110
5111         if (ha->recursive)
5112                 rv = zfs_iter_filesystems(zhp, zfs_release_one, ha);
5113         zfs_close(zhp);
5114         return (rv);
5115 }
5116
5117 int
5118 zfs_release(zfs_handle_t *zhp, const char *snapname, const char *tag,
5119     boolean_t recursive)
5120 {
5121         int ret;
5122         struct holdarg ha;
5123         nvlist_t *errors = NULL;
5124         nvpair_t *elem;
5125         libzfs_handle_t *hdl = zhp->zfs_hdl;
5126         char errbuf[1024];
5127
5128         ha.nvl = fnvlist_alloc();
5129         ha.snapname = snapname;
5130         ha.tag = tag;
5131         ha.recursive = recursive;
5132         ha.error = 0;
5133         (void) zfs_release_one(zfs_handle_dup(zhp), &ha);
5134
5135         if (nvlist_empty(ha.nvl)) {
5136                 fnvlist_free(ha.nvl);
5137                 ret = ha.error;
5138                 (void) snprintf(errbuf, sizeof (errbuf),
5139                     dgettext(TEXT_DOMAIN,
5140                     "cannot release hold from snapshot '%s@%s'"),
5141                     zhp->zfs_name, snapname);
5142                 if (ret == ESRCH) {
5143                         (void) zfs_error(hdl, EZFS_REFTAG_RELE, errbuf);
5144                 } else {
5145                         (void) zfs_standard_error(hdl, ret, errbuf);
5146                 }
5147                 return (ret);
5148         }
5149
5150         ret = lzc_release(ha.nvl, &errors);
5151         fnvlist_free(ha.nvl);
5152
5153         if (ret == 0) {
5154                 /* There may be errors even in the success case. */
5155                 fnvlist_free(errors);
5156                 return (0);
5157         }
5158
5159         if (nvlist_empty(errors)) {
5160                 /* no hold-specific errors */
5161                 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
5162                     "cannot release"));
5163                 switch (errno) {
5164                 case ENOTSUP:
5165                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
5166                             "pool must be upgraded"));
5167                         (void) zfs_error(hdl, EZFS_BADVERSION, errbuf);
5168                         break;
5169                 default:
5170                         (void) zfs_standard_error_fmt(hdl, errno, errbuf);
5171                 }
5172         }
5173
5174         for (elem = nvlist_next_nvpair(errors, NULL);
5175             elem != NULL;
5176             elem = nvlist_next_nvpair(errors, elem)) {
5177                 (void) snprintf(errbuf, sizeof (errbuf),
5178                     dgettext(TEXT_DOMAIN,
5179                     "cannot release hold from snapshot '%s'"),
5180                     nvpair_name(elem));
5181                 switch (fnvpair_value_int32(elem)) {
5182                 case ESRCH:
5183                         (void) zfs_error(hdl, EZFS_REFTAG_RELE, errbuf);
5184                         break;
5185                 case EINVAL:
5186                         (void) zfs_error(hdl, EZFS_BADTYPE, errbuf);
5187                         break;
5188                 default:
5189                         (void) zfs_standard_error_fmt(hdl,
5190                             fnvpair_value_int32(elem), errbuf);
5191                 }
5192         }
5193
5194         fnvlist_free(errors);
5195         return (ret);
5196 }
5197
5198 int
5199 zfs_get_fsacl(zfs_handle_t *zhp, nvlist_t **nvl)
5200 {
5201         zfs_cmd_t zc = {"\0"};
5202         libzfs_handle_t *hdl = zhp->zfs_hdl;
5203         int nvsz = 2048;
5204         void *nvbuf;
5205         int err = 0;
5206         char errbuf[1024];
5207
5208         assert(zhp->zfs_type == ZFS_TYPE_VOLUME ||
5209             zhp->zfs_type == ZFS_TYPE_FILESYSTEM);
5210
5211 tryagain:
5212
5213         nvbuf = malloc(nvsz);
5214         if (nvbuf == NULL) {
5215                 err = (zfs_error(hdl, EZFS_NOMEM, strerror(errno)));
5216                 goto out;
5217         }
5218
5219         zc.zc_nvlist_dst_size = nvsz;
5220         zc.zc_nvlist_dst = (uintptr_t)nvbuf;
5221
5222         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
5223
5224         if (ioctl(hdl->libzfs_fd, ZFS_IOC_GET_FSACL, &zc) != 0) {
5225                 (void) snprintf(errbuf, sizeof (errbuf),
5226                     dgettext(TEXT_DOMAIN, "cannot get permissions on '%s'"),
5227                     zc.zc_name);
5228                 switch (errno) {
5229                 case ENOMEM:
5230                         free(nvbuf);
5231                         nvsz = zc.zc_nvlist_dst_size;
5232                         goto tryagain;
5233
5234                 case ENOTSUP:
5235                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
5236                             "pool must be upgraded"));
5237                         err = zfs_error(hdl, EZFS_BADVERSION, errbuf);
5238                         break;
5239                 case EINVAL:
5240                         err = zfs_error(hdl, EZFS_BADTYPE, errbuf);
5241                         break;
5242                 case ENOENT:
5243                         err = zfs_error(hdl, EZFS_NOENT, errbuf);
5244                         break;
5245                 default:
5246                         err = zfs_standard_error_fmt(hdl, errno, errbuf);
5247                         break;
5248                 }
5249         } else {
5250                 /* success */
5251                 int rc = nvlist_unpack(nvbuf, zc.zc_nvlist_dst_size, nvl, 0);
5252                 if (rc) {
5253                         (void) snprintf(errbuf, sizeof (errbuf), dgettext(
5254                             TEXT_DOMAIN, "cannot get permissions on '%s'"),
5255                             zc.zc_name);
5256                         err = zfs_standard_error_fmt(hdl, rc, errbuf);
5257                 }
5258         }
5259
5260         free(nvbuf);
5261 out:
5262         return (err);
5263 }
5264
5265 int
5266 zfs_set_fsacl(zfs_handle_t *zhp, boolean_t un, nvlist_t *nvl)
5267 {
5268         zfs_cmd_t zc = {"\0"};
5269         libzfs_handle_t *hdl = zhp->zfs_hdl;
5270         char *nvbuf;
5271         char errbuf[1024];
5272         size_t nvsz;
5273         int err;
5274
5275         assert(zhp->zfs_type == ZFS_TYPE_VOLUME ||
5276             zhp->zfs_type == ZFS_TYPE_FILESYSTEM);
5277
5278         err = nvlist_size(nvl, &nvsz, NV_ENCODE_NATIVE);
5279         assert(err == 0);
5280
5281         nvbuf = malloc(nvsz);
5282
5283         err = nvlist_pack(nvl, &nvbuf, &nvsz, NV_ENCODE_NATIVE, 0);
5284         assert(err == 0);
5285
5286         zc.zc_nvlist_src_size = nvsz;
5287         zc.zc_nvlist_src = (uintptr_t)nvbuf;
5288         zc.zc_perm_action = un;
5289
5290         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
5291
5292         if (zfs_ioctl(hdl, ZFS_IOC_SET_FSACL, &zc) != 0) {
5293                 (void) snprintf(errbuf, sizeof (errbuf),
5294                     dgettext(TEXT_DOMAIN, "cannot set permissions on '%s'"),
5295                     zc.zc_name);
5296                 switch (errno) {
5297                 case ENOTSUP:
5298                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
5299                             "pool must be upgraded"));
5300                         err = zfs_error(hdl, EZFS_BADVERSION, errbuf);
5301                         break;
5302                 case EINVAL:
5303                         err = zfs_error(hdl, EZFS_BADTYPE, errbuf);
5304                         break;
5305                 case ENOENT:
5306                         err = zfs_error(hdl, EZFS_NOENT, errbuf);
5307                         break;
5308                 default:
5309                         err = zfs_standard_error_fmt(hdl, errno, errbuf);
5310                         break;
5311                 }
5312         }
5313
5314         free(nvbuf);
5315
5316         return (err);
5317 }
5318
5319 int
5320 zfs_get_holds(zfs_handle_t *zhp, nvlist_t **nvl)
5321 {
5322         int err;
5323         char errbuf[1024];
5324
5325         err = lzc_get_holds(zhp->zfs_name, nvl);
5326
5327         if (err != 0) {
5328                 libzfs_handle_t *hdl = zhp->zfs_hdl;
5329
5330                 (void) snprintf(errbuf, sizeof (errbuf),
5331                     dgettext(TEXT_DOMAIN, "cannot get holds for '%s'"),
5332                     zhp->zfs_name);
5333                 switch (err) {
5334                 case ENOTSUP:
5335                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
5336                             "pool must be upgraded"));
5337                         err = zfs_error(hdl, EZFS_BADVERSION, errbuf);
5338                         break;
5339                 case EINVAL:
5340                         err = zfs_error(hdl, EZFS_BADTYPE, errbuf);
5341                         break;
5342                 case ENOENT:
5343                         err = zfs_error(hdl, EZFS_NOENT, errbuf);
5344                         break;
5345                 default:
5346                         err = zfs_standard_error_fmt(hdl, errno, errbuf);
5347                         break;
5348                 }
5349         }
5350
5351         return (err);
5352 }
5353
5354 /*
5355  * Convert the zvol's volume size to an appropriate reservation.
5356  * Note: If this routine is updated, it is necessary to update the ZFS test
5357  * suite's shell version in reservation.kshlib.
5358  */
5359 uint64_t
5360 zvol_volsize_to_reservation(uint64_t volsize, nvlist_t *props)
5361 {
5362         uint64_t numdb;
5363         uint64_t nblocks, volblocksize;
5364         int ncopies;
5365         char *strval;
5366
5367         if (nvlist_lookup_string(props,
5368             zfs_prop_to_name(ZFS_PROP_COPIES), &strval) == 0)
5369                 ncopies = atoi(strval);
5370         else
5371                 ncopies = 1;
5372         if (nvlist_lookup_uint64(props,
5373             zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE),
5374             &volblocksize) != 0)
5375                 volblocksize = ZVOL_DEFAULT_BLOCKSIZE;
5376         nblocks = volsize/volblocksize;
5377         /* start with metadnode L0-L6 */
5378         numdb = 7;
5379         /* calculate number of indirects */
5380         while (nblocks > 1) {
5381                 nblocks += DNODES_PER_LEVEL - 1;
5382                 nblocks /= DNODES_PER_LEVEL;
5383                 numdb += nblocks;
5384         }
5385         numdb *= MIN(SPA_DVAS_PER_BP, ncopies + 1);
5386         volsize *= ncopies;
5387         /*
5388          * this is exactly DN_MAX_INDBLKSHIFT when metadata isn't
5389          * compressed, but in practice they compress down to about
5390          * 1100 bytes
5391          */
5392         numdb *= 1ULL << DN_MAX_INDBLKSHIFT;
5393         volsize += numdb;
5394         return (volsize);
5395 }