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

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21
  22 /*
  23  * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
  24  * Copyright (c) 2018, Joyent, Inc. All rights reserved.
  25  * Copyright (c) 2011, 2016 by Delphix. All rights reserved.
  26  * Copyright (c) 2012 DEY Storage Systems, Inc.  All rights reserved.
  27  * Copyright (c) 2011-2012 Pawel Jakub Dawidek. All rights reserved.
  28  * Copyright (c) 2013 Martin Matuska. All rights reserved.
  29  * Copyright (c) 2013 Steven Hartland. All rights reserved.
  30  * Copyright (c) 2014 Integros [integros.com]
  31  * Copyright 2016 Igor Kozhukhov <ikozhukhov@gmail.com>
  32  * Copyright 2017 Nexenta Systems, Inc.
  33  * Copyright 2017 RackTop Systems.
  34  */
  35
  36 #include <ctype.h>
  37 #include <errno.h>
  38 #include <libintl.h>
  39 #include <math.h>
  40 #include <stdio.h>
  41 #include <stdlib.h>
  42 #include <strings.h>
  43 #include <unistd.h>
  44 #include <stddef.h>
  45 #include <zone.h>
  46 #include <fcntl.h>
  47 #include <sys/mntent.h>
  48 #include <sys/mount.h>
  49 #include <priv.h>
  50 #include <pwd.h>
  51 #include <grp.h>
  52 #include <stddef.h>
  53 #ifdef illumos
  54 #include <idmap.h>
  55 #endif
  56
  57 #include <sys/dnode.h>
  58 #include <sys/spa.h>
  59 #include <sys/zap.h>
  60 #include <sys/misc.h>
  61 #include <libzfs.h>
  62
  63 #include "zfs_namecheck.h"
  64 #include "zfs_prop.h"
  65 #include "libzfs_impl.h"
  66 #include "zfs_deleg.h"
  67
  68 static int userquota_propname_decode(const char *propname, boolean_t zoned,
  69     zfs_userquota_prop_t *typep, char *domain, int domainlen, uint64_t *ridp);
  70
  71 /*
  72  * Given a single type (not a mask of types), return the type in a human
  73  * readable form.
  74  */
  75 const char *
  76 zfs_type_to_name(zfs_type_t type)
  77 {
  78         switch (type) {
  79         case ZFS_TYPE_FILESYSTEM:
  80                 return (dgettext(TEXT_DOMAIN, "filesystem"));
  81         case ZFS_TYPE_SNAPSHOT:
  82                 return (dgettext(TEXT_DOMAIN, "snapshot"));
  83         case ZFS_TYPE_VOLUME:
  84                 return (dgettext(TEXT_DOMAIN, "volume"));
  85         case ZFS_TYPE_POOL:
  86                 return (dgettext(TEXT_DOMAIN, "pool"));
  87         case ZFS_TYPE_BOOKMARK:
  88                 return (dgettext(TEXT_DOMAIN, "bookmark"));
  89         default:
  90                 assert(!"unhandled zfs_type_t");
  91         }
  92
  93         return (NULL);
  94 }
  95
  96 /*
  97  * Validate a ZFS path.  This is used even before trying to open the dataset, to
  98  * provide a more meaningful error message.  We call zfs_error_aux() to
  99  * explain exactly why the name was not valid.
 100  */
 101 int
 102 zfs_validate_name(libzfs_handle_t *hdl, const char *path, int type,
 103     boolean_t modifying)
 104 {
 105         namecheck_err_t why;
 106         char what;
 107
 108         if (entity_namecheck(path, &why, &what) != 0) {
 109                 if (hdl != NULL) {
 110                         switch (why) {
 111                         case NAME_ERR_TOOLONG:
 112                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 113                                     "name is too long"));
 114                                 break;
 115
 116                         case NAME_ERR_LEADING_SLASH:
 117                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 118                                     "leading slash in name"));
 119                                 break;
 120
 121                         case NAME_ERR_EMPTY_COMPONENT:
 122                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 123                                     "empty component in name"));
 124                                 break;
 125
 126                         case NAME_ERR_TRAILING_SLASH:
 127                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 128                                     "trailing slash in name"));
 129                                 break;
 130
 131                         case NAME_ERR_INVALCHAR:
 132                                 zfs_error_aux(hdl,
 133                                     dgettext(TEXT_DOMAIN, "invalid character "
 134                                     "'%c' in name"), what);
 135                                 break;
 136
 137                         case NAME_ERR_MULTIPLE_DELIMITERS:
 138                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 139                                     "multiple '@' and/or '#' delimiters in "
 140                                     "name"));
 141                                 break;
 142
 143                         case NAME_ERR_NOLETTER:
 144                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 145                                     "pool doesn't begin with a letter"));
 146                                 break;
 147
 148                         case NAME_ERR_RESERVED:
 149                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 150                                     "name is reserved"));
 151                                 break;
 152
 153                         case NAME_ERR_DISKLIKE:
 154                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 155                                     "reserved disk name"));
 156                                 break;
 157
 158                         default:
 159                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 160                                     "(%d) not defined"), why);
 161                                 break;
 162                         }
 163                 }
 164
 165                 return (0);
 166         }
 167
 168         if (!(type & ZFS_TYPE_SNAPSHOT) && strchr(path, '@') != NULL) {
 169                 if (hdl != NULL)
 170                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 171                             "snapshot delimiter '@' is not expected here"));
 172                 return (0);
 173         }
 174
 175         if (type == ZFS_TYPE_SNAPSHOT && strchr(path, '@') == NULL) {
 176                 if (hdl != NULL)
 177                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 178                             "missing '@' delimiter in snapshot name"));
 179                 return (0);
 180         }
 181
 182         if (!(type & ZFS_TYPE_BOOKMARK) && strchr(path, '#') != NULL) {
 183                 if (hdl != NULL)
 184                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 185                             "bookmark delimiter '#' is not expected here"));
 186                 return (0);
 187         }
 188
 189         if (type == ZFS_TYPE_BOOKMARK && strchr(path, '#') == NULL) {
 190                 if (hdl != NULL)
 191                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 192                             "missing '#' delimiter in bookmark name"));
 193                 return (0);
 194         }
 195
 196         if (modifying && strchr(path, '%') != NULL) {
 197                 if (hdl != NULL)
 198                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 199                             "invalid character %c in name"), '%');
 200                 return (0);
 201         }
 202
 203         return (-1);
 204 }
 205
 206 int
 207 zfs_name_valid(const char *name, zfs_type_t type)
 208 {
 209         if (type == ZFS_TYPE_POOL)
 210                 return (zpool_name_valid(NULL, B_FALSE, name));
 211         return (zfs_validate_name(NULL, name, type, B_FALSE));
 212 }
 213
 214 /*
 215  * This function takes the raw DSL properties, and filters out the user-defined
 216  * properties into a separate nvlist.
 217  */
 218 static nvlist_t *
 219 process_user_props(zfs_handle_t *zhp, nvlist_t *props)
 220 {
 221         libzfs_handle_t *hdl = zhp->zfs_hdl;
 222         nvpair_t *elem;
 223         nvlist_t *propval;
 224         nvlist_t *nvl;
 225
 226         if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0) != 0) {
 227                 (void) no_memory(hdl);
 228                 return (NULL);
 229         }
 230
 231         elem = NULL;
 232         while ((elem = nvlist_next_nvpair(props, elem)) != NULL) {
 233                 if (!zfs_prop_user(nvpair_name(elem)))
 234                         continue;
 235
 236                 verify(nvpair_value_nvlist(elem, &propval) == 0);
 237                 if (nvlist_add_nvlist(nvl, nvpair_name(elem), propval) != 0) {
 238                         nvlist_free(nvl);
 239                         (void) no_memory(hdl);
 240                         return (NULL);
 241                 }
 242         }
 243
 244         return (nvl);
 245 }
 246
 247 static zpool_handle_t *
 248 zpool_add_handle(zfs_handle_t *zhp, const char *pool_name)
 249 {
 250         libzfs_handle_t *hdl = zhp->zfs_hdl;
 251         zpool_handle_t *zph;
 252
 253         if ((zph = zpool_open_canfail(hdl, pool_name)) != NULL) {
 254                 if (hdl->libzfs_pool_handles != NULL)
 255                         zph->zpool_next = hdl->libzfs_pool_handles;
 256                 hdl->libzfs_pool_handles = zph;
 257         }
 258         return (zph);
 259 }
 260
 261 static zpool_handle_t *
 262 zpool_find_handle(zfs_handle_t *zhp, const char *pool_name, int len)
 263 {
 264         libzfs_handle_t *hdl = zhp->zfs_hdl;
 265         zpool_handle_t *zph = hdl->libzfs_pool_handles;
 266
 267         while ((zph != NULL) &&
 268             (strncmp(pool_name, zpool_get_name(zph), len) != 0))
 269                 zph = zph->zpool_next;
 270         return (zph);
 271 }
 272
 273 /*
 274  * Returns a handle to the pool that contains the provided dataset.
 275  * If a handle to that pool already exists then that handle is returned.
 276  * Otherwise, a new handle is created and added to the list of handles.
 277  */
 278 static zpool_handle_t *
 279 zpool_handle(zfs_handle_t *zhp)
 280 {
 281         char *pool_name;
 282         int len;
 283         zpool_handle_t *zph;
 284
 285         len = strcspn(zhp->zfs_name, "/@#") + 1;
 286         pool_name = zfs_alloc(zhp->zfs_hdl, len);
 287         (void) strlcpy(pool_name, zhp->zfs_name, len);
 288
 289         zph = zpool_find_handle(zhp, pool_name, len);
 290         if (zph == NULL)
 291                 zph = zpool_add_handle(zhp, pool_name);
 292
 293         free(pool_name);
 294         return (zph);
 295 }
 296
 297 void
 298 zpool_free_handles(libzfs_handle_t *hdl)
 299 {
 300         zpool_handle_t *next, *zph = hdl->libzfs_pool_handles;
 301
 302         while (zph != NULL) {
 303                 next = zph->zpool_next;
 304                 zpool_close(zph);
 305                 zph = next;
 306         }
 307         hdl->libzfs_pool_handles = NULL;
 308 }
 309
 310 /*
 311  * Utility function to gather stats (objset and zpl) for the given object.
 312  */
 313 static int
 314 get_stats_ioctl(zfs_handle_t *zhp, zfs_cmd_t *zc)
 315 {
 316         libzfs_handle_t *hdl = zhp->zfs_hdl;
 317
 318         (void) strlcpy(zc->zc_name, zhp->zfs_name, sizeof (zc->zc_name));
 319
 320         while (ioctl(hdl->libzfs_fd, ZFS_IOC_OBJSET_STATS, zc) != 0) {
 321                 if (errno == ENOMEM) {
 322                         if (zcmd_expand_dst_nvlist(hdl, zc) != 0) {
 323                                 return (-1);
 324                         }
 325                 } else {
 326                         return (-1);
 327                 }
 328         }
 329         return (0);
 330 }
 331
 332 /*
 333  * Utility function to get the received properties of the given object.
 334  */
 335 static int
 336 get_recvd_props_ioctl(zfs_handle_t *zhp)
 337 {
 338         libzfs_handle_t *hdl = zhp->zfs_hdl;
 339         nvlist_t *recvdprops;
 340         zfs_cmd_t zc = { 0 };
 341         int err;
 342
 343         if (zcmd_alloc_dst_nvlist(hdl, &zc, 0) != 0)
 344                 return (-1);
 345
 346         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
 347
 348         while (ioctl(hdl->libzfs_fd, ZFS_IOC_OBJSET_RECVD_PROPS, &zc) != 0) {
 349                 if (errno == ENOMEM) {
 350                         if (zcmd_expand_dst_nvlist(hdl, &zc) != 0) {
 351                                 return (-1);
 352                         }
 353                 } else {
 354                         zcmd_free_nvlists(&zc);
 355                         return (-1);
 356                 }
 357         }
 358
 359         err = zcmd_read_dst_nvlist(zhp->zfs_hdl, &zc, &recvdprops);
 360         zcmd_free_nvlists(&zc);
 361         if (err != 0)
 362                 return (-1);
 363
 364         nvlist_free(zhp->zfs_recvd_props);
 365         zhp->zfs_recvd_props = recvdprops;
 366
 367         return (0);
 368 }
 369
 370 static int
 371 put_stats_zhdl(zfs_handle_t *zhp, zfs_cmd_t *zc)
 372 {
 373         nvlist_t *allprops, *userprops;
 374
 375         zhp->zfs_dmustats = zc->zc_objset_stats; /* structure assignment */
 376
 377         if (zcmd_read_dst_nvlist(zhp->zfs_hdl, zc, &allprops) != 0) {
 378                 return (-1);
 379         }
 380
 381         /*
 382          * XXX Why do we store the user props separately, in addition to
 383          * storing them in zfs_props?
 384          */
 385         if ((userprops = process_user_props(zhp, allprops)) == NULL) {
 386                 nvlist_free(allprops);
 387                 return (-1);
 388         }
 389
 390         nvlist_free(zhp->zfs_props);
 391         nvlist_free(zhp->zfs_user_props);
 392
 393         zhp->zfs_props = allprops;
 394         zhp->zfs_user_props = userprops;
 395
 396         return (0);
 397 }
 398
 399 static int
 400 get_stats(zfs_handle_t *zhp)
 401 {
 402         int rc = 0;
 403         zfs_cmd_t zc = { 0 };
 404
 405         if (zcmd_alloc_dst_nvlist(zhp->zfs_hdl, &zc, 0) != 0)
 406                 return (-1);
 407         if (get_stats_ioctl(zhp, &zc) != 0)
 408                 rc = -1;
 409         else if (put_stats_zhdl(zhp, &zc) != 0)
 410                 rc = -1;
 411         zcmd_free_nvlists(&zc);
 412         return (rc);
 413 }
 414
 415 /*
 416  * Refresh the properties currently stored in the handle.
 417  */
 418 void
 419 zfs_refresh_properties(zfs_handle_t *zhp)
 420 {
 421         (void) get_stats(zhp);
 422 }
 423
 424 /*
 425  * Makes a handle from the given dataset name.  Used by zfs_open() and
 426  * zfs_iter_* to create child handles on the fly.
 427  */
 428 static int
 429 make_dataset_handle_common(zfs_handle_t *zhp, zfs_cmd_t *zc)
 430 {
 431         if (put_stats_zhdl(zhp, zc) != 0)
 432                 return (-1);
 433
 434         /*
 435          * We've managed to open the dataset and gather statistics.  Determine
 436          * the high-level type.
 437          */
 438         if (zhp->zfs_dmustats.dds_type == DMU_OST_ZVOL)
 439                 zhp->zfs_head_type = ZFS_TYPE_VOLUME;
 440         else if (zhp->zfs_dmustats.dds_type == DMU_OST_ZFS)
 441                 zhp->zfs_head_type = ZFS_TYPE_FILESYSTEM;
 442         else
 443                 abort();
 444
 445         if (zhp->zfs_dmustats.dds_is_snapshot)
 446                 zhp->zfs_type = ZFS_TYPE_SNAPSHOT;
 447         else if (zhp->zfs_dmustats.dds_type == DMU_OST_ZVOL)
 448                 zhp->zfs_type = ZFS_TYPE_VOLUME;
 449         else if (zhp->zfs_dmustats.dds_type == DMU_OST_ZFS)
 450                 zhp->zfs_type = ZFS_TYPE_FILESYSTEM;
 451         else
 452                 abort();        /* we should never see any other types */
 453
 454         if ((zhp->zpool_hdl = zpool_handle(zhp)) == NULL)
 455                 return (-1);
 456
 457         return (0);
 458 }
 459
 460 zfs_handle_t *
 461 make_dataset_handle(libzfs_handle_t *hdl, const char *path)
 462 {
 463         zfs_cmd_t zc = { 0 };
 464
 465         zfs_handle_t *zhp = calloc(sizeof (zfs_handle_t), 1);
 466
 467         if (zhp == NULL)
 468                 return (NULL);
 469
 470         zhp->zfs_hdl = hdl;
 471         (void) strlcpy(zhp->zfs_name, path, sizeof (zhp->zfs_name));
 472         if (zcmd_alloc_dst_nvlist(hdl, &zc, 0) != 0) {
 473                 free(zhp);
 474                 return (NULL);
 475         }
 476         if (get_stats_ioctl(zhp, &zc) == -1) {
 477                 zcmd_free_nvlists(&zc);
 478                 free(zhp);
 479                 return (NULL);
 480         }
 481         if (make_dataset_handle_common(zhp, &zc) == -1) {
 482                 free(zhp);
 483                 zhp = NULL;
 484         }
 485         zcmd_free_nvlists(&zc);
 486         return (zhp);
 487 }
 488
 489 zfs_handle_t *
 490 make_dataset_handle_zc(libzfs_handle_t *hdl, zfs_cmd_t *zc)
 491 {
 492         zfs_handle_t *zhp = calloc(sizeof (zfs_handle_t), 1);
 493
 494         if (zhp == NULL)
 495                 return (NULL);
 496
 497         zhp->zfs_hdl = hdl;
 498         (void) strlcpy(zhp->zfs_name, zc->zc_name, sizeof (zhp->zfs_name));
 499         if (make_dataset_handle_common(zhp, zc) == -1) {
 500                 free(zhp);
 501                 return (NULL);
 502         }
 503         return (zhp);
 504 }
 505
 506 zfs_handle_t *
 507 make_dataset_simple_handle_zc(zfs_handle_t *pzhp, zfs_cmd_t *zc)
 508 {
 509         zfs_handle_t *zhp = calloc(sizeof (zfs_handle_t), 1);
 510
 511         if (zhp == NULL)
 512                 return (NULL);
 513
 514         zhp->zfs_hdl = pzhp->zfs_hdl;
 515         (void) strlcpy(zhp->zfs_name, zc->zc_name, sizeof (zhp->zfs_name));
 516         zhp->zfs_head_type = pzhp->zfs_type;
 517         zhp->zfs_type = ZFS_TYPE_SNAPSHOT;
 518         zhp->zpool_hdl = zpool_handle(zhp);
 519         return (zhp);
 520 }
 521
 522 zfs_handle_t *
 523 zfs_handle_dup(zfs_handle_t *zhp_orig)
 524 {
 525         zfs_handle_t *zhp = calloc(sizeof (zfs_handle_t), 1);
 526
 527         if (zhp == NULL)
 528                 return (NULL);
 529
 530         zhp->zfs_hdl = zhp_orig->zfs_hdl;
 531         zhp->zpool_hdl = zhp_orig->zpool_hdl;
 532         (void) strlcpy(zhp->zfs_name, zhp_orig->zfs_name,
 533             sizeof (zhp->zfs_name));
 534         zhp->zfs_type = zhp_orig->zfs_type;
 535         zhp->zfs_head_type = zhp_orig->zfs_head_type;
 536         zhp->zfs_dmustats = zhp_orig->zfs_dmustats;
 537         if (zhp_orig->zfs_props != NULL) {
 538                 if (nvlist_dup(zhp_orig->zfs_props, &zhp->zfs_props, 0) != 0) {
 539                         (void) no_memory(zhp->zfs_hdl);
 540                         zfs_close(zhp);
 541                         return (NULL);
 542                 }
 543         }
 544         if (zhp_orig->zfs_user_props != NULL) {
 545                 if (nvlist_dup(zhp_orig->zfs_user_props,
 546                     &zhp->zfs_user_props, 0) != 0) {
 547                         (void) no_memory(zhp->zfs_hdl);
 548                         zfs_close(zhp);
 549                         return (NULL);
 550                 }
 551         }
 552         if (zhp_orig->zfs_recvd_props != NULL) {
 553                 if (nvlist_dup(zhp_orig->zfs_recvd_props,
 554                     &zhp->zfs_recvd_props, 0)) {
 555                         (void) no_memory(zhp->zfs_hdl);
 556                         zfs_close(zhp);
 557                         return (NULL);
 558                 }
 559         }
 560         zhp->zfs_mntcheck = zhp_orig->zfs_mntcheck;
 561         if (zhp_orig->zfs_mntopts != NULL) {
 562                 zhp->zfs_mntopts = zfs_strdup(zhp_orig->zfs_hdl,
 563                     zhp_orig->zfs_mntopts);
 564         }
 565         zhp->zfs_props_table = zhp_orig->zfs_props_table;
 566         return (zhp);
 567 }
 568
 569 boolean_t
 570 zfs_bookmark_exists(const char *path)
 571 {
 572         nvlist_t *bmarks;
 573         nvlist_t *props;
 574         char fsname[ZFS_MAX_DATASET_NAME_LEN];
 575         char *bmark_name;
 576         char *pound;
 577         int err;
 578         boolean_t rv;
 579
 580
 581         (void) strlcpy(fsname, path, sizeof (fsname));
 582         pound = strchr(fsname, '#');
 583         if (pound == NULL)
 584                 return (B_FALSE);
 585
 586         *pound = '\0';
 587         bmark_name = pound + 1;
 588         props = fnvlist_alloc();
 589         err = lzc_get_bookmarks(fsname, props, &bmarks);
 590         nvlist_free(props);
 591         if (err != 0) {
 592                 nvlist_free(bmarks);
 593                 return (B_FALSE);
 594         }
 595
 596         rv = nvlist_exists(bmarks, bmark_name);
 597         nvlist_free(bmarks);
 598         return (rv);
 599 }
 600
 601 zfs_handle_t *
 602 make_bookmark_handle(zfs_handle_t *parent, const char *path,
 603     nvlist_t *bmark_props)
 604 {
 605         zfs_handle_t *zhp = calloc(sizeof (zfs_handle_t), 1);
 606
 607         if (zhp == NULL)
 608                 return (NULL);
 609
 610         /* Fill in the name. */
 611         zhp->zfs_hdl = parent->zfs_hdl;
 612         (void) strlcpy(zhp->zfs_name, path, sizeof (zhp->zfs_name));
 613
 614         /* Set the property lists. */
 615         if (nvlist_dup(bmark_props, &zhp->zfs_props, 0) != 0) {
 616                 free(zhp);
 617                 return (NULL);
 618         }
 619
 620         /* Set the types. */
 621         zhp->zfs_head_type = parent->zfs_head_type;
 622         zhp->zfs_type = ZFS_TYPE_BOOKMARK;
 623
 624         if ((zhp->zpool_hdl = zpool_handle(zhp)) == NULL) {
 625                 nvlist_free(zhp->zfs_props);
 626                 free(zhp);
 627                 return (NULL);
 628         }
 629
 630         return (zhp);
 631 }
 632
 633 struct zfs_open_bookmarks_cb_data {
 634         const char *path;
 635         zfs_handle_t *zhp;
 636 };
 637
 638 static int
 639 zfs_open_bookmarks_cb(zfs_handle_t *zhp, void *data)
 640 {
 641         struct zfs_open_bookmarks_cb_data *dp = data;
 642
 643         /*
 644          * Is it the one we are looking for?
 645          */
 646         if (strcmp(dp->path, zfs_get_name(zhp)) == 0) {
 647                 /*
 648                  * We found it.  Save it and let the caller know we are done.
 649                  */
 650                 dp->zhp = zhp;
 651                 return (EEXIST);
 652         }
 653
 654         /*
 655          * Not found.  Close the handle and ask for another one.
 656          */
 657         zfs_close(zhp);
 658         return (0);
 659 }
 660
 661 /*
 662  * Opens the given snapshot, bookmark, filesystem, or volume.   The 'types'
 663  * argument is a mask of acceptable types.  The function will print an
 664  * appropriate error message and return NULL if it can't be opened.
 665  */
 666 zfs_handle_t *
 667 zfs_open(libzfs_handle_t *hdl, const char *path, int types)
 668 {
 669         zfs_handle_t *zhp;
 670         char errbuf[1024];
 671         char *bookp;
 672
 673         (void) snprintf(errbuf, sizeof (errbuf),
 674             dgettext(TEXT_DOMAIN, "cannot open '%s'"), path);
 675
 676         /*
 677          * Validate the name before we even try to open it.
 678          */
 679         if (!zfs_validate_name(hdl, path, types, B_FALSE)) {
 680                 (void) zfs_error(hdl, EZFS_INVALIDNAME, errbuf);
 681                 return (NULL);
 682         }
 683
 684         /*
 685          * Bookmarks needs to be handled separately.
 686          */
 687         bookp = strchr(path, '#');
 688         if (bookp == NULL) {
 689                 /*
 690                  * Try to get stats for the dataset, which will tell us if it
 691                  * exists.
 692                  */
 693                 errno = 0;
 694                 if ((zhp = make_dataset_handle(hdl, path)) == NULL) {
 695                         (void) zfs_standard_error(hdl, errno, errbuf);
 696                         return (NULL);
 697                 }
 698         } else {
 699                 char dsname[ZFS_MAX_DATASET_NAME_LEN];
 700                 zfs_handle_t *pzhp;
 701                 struct zfs_open_bookmarks_cb_data cb_data = {path, NULL};
 702
 703                 /*
 704                  * We need to cut out '#' and everything after '#'
 705                  * to get the parent dataset name only.
 706                  */
 707                 assert(bookp - path < sizeof (dsname));
 708                 (void) strncpy(dsname, path, bookp - path);
 709                 dsname[bookp - path] = '\0';
 710
 711                 /*
 712                  * Create handle for the parent dataset.
 713                  */
 714                 errno = 0;
 715                 if ((pzhp = make_dataset_handle(hdl, dsname)) == NULL) {
 716                         (void) zfs_standard_error(hdl, errno, errbuf);
 717                         return (NULL);
 718                 }
 719
 720                 /*
 721                  * Iterate bookmarks to find the right one.
 722                  */
 723                 errno = 0;
 724                 if ((zfs_iter_bookmarks(pzhp, zfs_open_bookmarks_cb,
 725                     &cb_data) == 0) && (cb_data.zhp == NULL)) {
 726                         (void) zfs_error(hdl, EZFS_NOENT, errbuf);
 727                         zfs_close(pzhp);
 728                         return (NULL);
 729                 }
 730                 if (cb_data.zhp == NULL) {
 731                         (void) zfs_standard_error(hdl, errno, errbuf);
 732                         zfs_close(pzhp);
 733                         return (NULL);
 734                 }
 735                 zhp = cb_data.zhp;
 736
 737                 /*
 738                  * Cleanup.
 739                  */
 740                 zfs_close(pzhp);
 741         }
 742
 743         if (zhp == NULL) {
 744                 char *at = strchr(path, '@');
 745
 746                 if (at != NULL)
 747                         *at = '\0';
 748                 errno = 0;
 749                 if ((zhp = make_dataset_handle(hdl, path)) == NULL) {
 750                         (void) zfs_standard_error(hdl, errno, errbuf);
 751                         return (NULL);
 752                 }
 753                 if (at != NULL)
 754                         *at = '@';
 755                 (void) strlcpy(zhp->zfs_name, path, sizeof (zhp->zfs_name));
 756                 zhp->zfs_type = ZFS_TYPE_SNAPSHOT;
 757         }
 758
 759         if (!(types & zhp->zfs_type)) {
 760                 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf);
 761                 zfs_close(zhp);
 762                 return (NULL);
 763         }
 764
 765         return (zhp);
 766 }
 767
 768 /*
 769  * Release a ZFS handle.  Nothing to do but free the associated memory.
 770  */
 771 void
 772 zfs_close(zfs_handle_t *zhp)
 773 {
 774         if (zhp->zfs_mntopts)
 775                 free(zhp->zfs_mntopts);
 776         nvlist_free(zhp->zfs_props);
 777         nvlist_free(zhp->zfs_user_props);
 778         nvlist_free(zhp->zfs_recvd_props);
 779         free(zhp);
 780 }
 781
 782 typedef struct mnttab_node {
 783         struct mnttab mtn_mt;
 784         avl_node_t mtn_node;
 785 } mnttab_node_t;
 786
 787 static int
 788 libzfs_mnttab_cache_compare(const void *arg1, const void *arg2)
 789 {
 790         const mnttab_node_t *mtn1 = (const mnttab_node_t *)arg1;
 791         const mnttab_node_t *mtn2 = (const mnttab_node_t *)arg2;
 792         int rv;
 793
 794         rv = strcmp(mtn1->mtn_mt.mnt_special, mtn2->mtn_mt.mnt_special);
 795
 796         return (AVL_ISIGN(rv));
 797 }
 798
 799 void
 800 libzfs_mnttab_init(libzfs_handle_t *hdl)
 801 {
 802         assert(avl_numnodes(&hdl->libzfs_mnttab_cache) == 0);
 803         avl_create(&hdl->libzfs_mnttab_cache, libzfs_mnttab_cache_compare,
 804             sizeof (mnttab_node_t), offsetof(mnttab_node_t, mtn_node));
 805 }
 806
 807 void
 808 libzfs_mnttab_update(libzfs_handle_t *hdl)
 809 {
 810         struct mnttab entry;
 811
 812         rewind(hdl->libzfs_mnttab);
 813         while (getmntent(hdl->libzfs_mnttab, &entry) == 0) {
 814                 mnttab_node_t *mtn;
 815
 816                 if (strcmp(entry.mnt_fstype, MNTTYPE_ZFS) != 0)
 817                         continue;
 818                 mtn = zfs_alloc(hdl, sizeof (mnttab_node_t));
 819                 mtn->mtn_mt.mnt_special = zfs_strdup(hdl, entry.mnt_special);
 820                 mtn->mtn_mt.mnt_mountp = zfs_strdup(hdl, entry.mnt_mountp);
 821                 mtn->mtn_mt.mnt_fstype = zfs_strdup(hdl, entry.mnt_fstype);
 822                 mtn->mtn_mt.mnt_mntopts = zfs_strdup(hdl, entry.mnt_mntopts);
 823                 avl_add(&hdl->libzfs_mnttab_cache, mtn);
 824         }
 825 }
 826
 827 void
 828 libzfs_mnttab_fini(libzfs_handle_t *hdl)
 829 {
 830         void *cookie = NULL;
 831         mnttab_node_t *mtn;
 832
 833         while ((mtn = avl_destroy_nodes(&hdl->libzfs_mnttab_cache, &cookie))
 834             != NULL) {
 835                 free(mtn->mtn_mt.mnt_special);
 836                 free(mtn->mtn_mt.mnt_mountp);
 837                 free(mtn->mtn_mt.mnt_fstype);
 838                 free(mtn->mtn_mt.mnt_mntopts);
 839                 free(mtn);
 840         }
 841         avl_destroy(&hdl->libzfs_mnttab_cache);
 842 }
 843
 844 void
 845 libzfs_mnttab_cache(libzfs_handle_t *hdl, boolean_t enable)
 846 {
 847         hdl->libzfs_mnttab_enable = enable;
 848 }
 849
 850 int
 851 libzfs_mnttab_find(libzfs_handle_t *hdl, const char *fsname,
 852     struct mnttab *entry)
 853 {
 854         mnttab_node_t find;
 855         mnttab_node_t *mtn;
 856
 857         if (!hdl->libzfs_mnttab_enable) {
 858                 struct mnttab srch = { 0 };
 859
 860                 if (avl_numnodes(&hdl->libzfs_mnttab_cache))
 861                         libzfs_mnttab_fini(hdl);
 862                 rewind(hdl->libzfs_mnttab);
 863                 srch.mnt_special = (char *)fsname;
 864                 srch.mnt_fstype = MNTTYPE_ZFS;
 865                 if (getmntany(hdl->libzfs_mnttab, entry, &srch) == 0)
 866                         return (0);
 867                 else
 868                         return (ENOENT);
 869         }
 870
 871         if (avl_numnodes(&hdl->libzfs_mnttab_cache) == 0)
 872                 libzfs_mnttab_update(hdl);
 873
 874         find.mtn_mt.mnt_special = (char *)fsname;
 875         mtn = avl_find(&hdl->libzfs_mnttab_cache, &find, NULL);
 876         if (mtn) {
 877                 *entry = mtn->mtn_mt;
 878                 return (0);
 879         }
 880         return (ENOENT);
 881 }
 882
 883 void
 884 libzfs_mnttab_add(libzfs_handle_t *hdl, const char *special,
 885     const char *mountp, const char *mntopts)
 886 {
 887         mnttab_node_t *mtn;
 888
 889         if (avl_numnodes(&hdl->libzfs_mnttab_cache) == 0)
 890                 return;
 891         mtn = zfs_alloc(hdl, sizeof (mnttab_node_t));
 892         mtn->mtn_mt.mnt_special = zfs_strdup(hdl, special);
 893         mtn->mtn_mt.mnt_mountp = zfs_strdup(hdl, mountp);
 894         mtn->mtn_mt.mnt_fstype = zfs_strdup(hdl, MNTTYPE_ZFS);
 895         mtn->mtn_mt.mnt_mntopts = zfs_strdup(hdl, mntopts);
 896         avl_add(&hdl->libzfs_mnttab_cache, mtn);
 897 }
 898
 899 void
 900 libzfs_mnttab_remove(libzfs_handle_t *hdl, const char *fsname)
 901 {
 902         mnttab_node_t find;
 903         mnttab_node_t *ret;
 904
 905         find.mtn_mt.mnt_special = (char *)fsname;
 906         if ((ret = avl_find(&hdl->libzfs_mnttab_cache, (void *)&find, NULL))
 907             != NULL) {
 908                 avl_remove(&hdl->libzfs_mnttab_cache, ret);
 909                 free(ret->mtn_mt.mnt_special);
 910                 free(ret->mtn_mt.mnt_mountp);
 911                 free(ret->mtn_mt.mnt_fstype);
 912                 free(ret->mtn_mt.mnt_mntopts);
 913                 free(ret);
 914         }
 915 }
 916
 917 int
 918 zfs_spa_version(zfs_handle_t *zhp, int *spa_version)
 919 {
 920         zpool_handle_t *zpool_handle = zhp->zpool_hdl;
 921
 922         if (zpool_handle == NULL)
 923                 return (-1);
 924
 925         *spa_version = zpool_get_prop_int(zpool_handle,
 926             ZPOOL_PROP_VERSION, NULL);
 927         return (0);
 928 }
 929
 930 /*
 931  * The choice of reservation property depends on the SPA version.
 932  */
 933 static int
 934 zfs_which_resv_prop(zfs_handle_t *zhp, zfs_prop_t *resv_prop)
 935 {
 936         int spa_version;
 937
 938         if (zfs_spa_version(zhp, &spa_version) < 0)
 939                 return (-1);
 940
 941         if (spa_version >= SPA_VERSION_REFRESERVATION)
 942                 *resv_prop = ZFS_PROP_REFRESERVATION;
 943         else
 944                 *resv_prop = ZFS_PROP_RESERVATION;
 945
 946         return (0);
 947 }
 948
 949 /*
 950  * Given an nvlist of properties to set, validates that they are correct, and
 951  * parses any numeric properties (index, boolean, etc) if they are specified as
 952  * strings.
 953  */
 954 nvlist_t *
 955 zfs_valid_proplist(libzfs_handle_t *hdl, zfs_type_t type, nvlist_t *nvl,
 956     uint64_t zoned, zfs_handle_t *zhp, zpool_handle_t *zpool_hdl,
 957     const char *errbuf)
 958 {
 959         nvpair_t *elem;
 960         uint64_t intval;
 961         char *strval;
 962         zfs_prop_t prop;
 963         nvlist_t *ret;
 964         int chosen_normal = -1;
 965         int chosen_utf = -1;
 966
 967         if (nvlist_alloc(&ret, NV_UNIQUE_NAME, 0) != 0) {
 968                 (void) no_memory(hdl);
 969                 return (NULL);
 970         }
 971
 972         /*
 973          * Make sure this property is valid and applies to this type.
 974          */
 975
 976         elem = NULL;
 977         while ((elem = nvlist_next_nvpair(nvl, elem)) != NULL) {
 978                 const char *propname = nvpair_name(elem);
 979
 980                 prop = zfs_name_to_prop(propname);
 981                 if (prop == ZPROP_INVAL && zfs_prop_user(propname)) {
 982                         /*
 983                          * This is a user property: make sure it's a
 984                          * string, and that it's less than ZAP_MAXNAMELEN.
 985                          */
 986                         if (nvpair_type(elem) != DATA_TYPE_STRING) {
 987                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 988                                     "'%s' must be a string"), propname);
 989                                 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
 990                                 goto error;
 991                         }
 992
 993                         if (strlen(nvpair_name(elem)) >= ZAP_MAXNAMELEN) {
 994                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 995                                     "property name '%s' is too long"),
 996                                     propname);
 997                                 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
 998                                 goto error;
 999                         }
1000
1001                         (void) nvpair_value_string(elem, &strval);
1002                         if (nvlist_add_string(ret, propname, strval) != 0) {
1003                                 (void) no_memory(hdl);
1004                                 goto error;
1005                         }
1006                         continue;
1007                 }
1008
1009                 /*
1010                  * Currently, only user properties can be modified on
1011                  * snapshots.
1012                  */
1013                 if (type == ZFS_TYPE_SNAPSHOT) {
1014                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1015                             "this property can not be modified for snapshots"));
1016                         (void) zfs_error(hdl, EZFS_PROPTYPE, errbuf);
1017                         goto error;
1018                 }
1019
1020                 if (prop == ZPROP_INVAL && zfs_prop_userquota(propname)) {
1021                         zfs_userquota_prop_t uqtype;
1022                         char newpropname[128];
1023                         char domain[128];
1024                         uint64_t rid;
1025                         uint64_t valary[3];
1026
1027                         if (userquota_propname_decode(propname, zoned,
1028                             &uqtype, domain, sizeof (domain), &rid) != 0) {
1029                                 zfs_error_aux(hdl,
1030                                     dgettext(TEXT_DOMAIN,
1031                                     "'%s' has an invalid user/group name"),
1032                                     propname);
1033                                 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1034                                 goto error;
1035                         }
1036
1037                         if (uqtype != ZFS_PROP_USERQUOTA &&
1038                             uqtype != ZFS_PROP_GROUPQUOTA) {
1039                                 zfs_error_aux(hdl,
1040                                     dgettext(TEXT_DOMAIN, "'%s' is readonly"),
1041                                     propname);
1042                                 (void) zfs_error(hdl, EZFS_PROPREADONLY,
1043                                     errbuf);
1044                                 goto error;
1045                         }
1046
1047                         if (nvpair_type(elem) == DATA_TYPE_STRING) {
1048                                 (void) nvpair_value_string(elem, &strval);
1049                                 if (strcmp(strval, "none") == 0) {
1050                                         intval = 0;
1051                                 } else if (zfs_nicestrtonum(hdl,
1052                                     strval, &intval) != 0) {
1053                                         (void) zfs_error(hdl,
1054                                             EZFS_BADPROP, errbuf);
1055                                         goto error;
1056                                 }
1057                         } else if (nvpair_type(elem) ==
1058                             DATA_TYPE_UINT64) {
1059                                 (void) nvpair_value_uint64(elem, &intval);
1060                                 if (intval == 0) {
1061                                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1062                                             "use 'none' to disable "
1063                                             "userquota/groupquota"));
1064                                         goto error;
1065                                 }
1066                         } else {
1067                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1068                                     "'%s' must be a number"), propname);
1069                                 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1070                                 goto error;
1071                         }
1072
1073                         /*
1074                          * Encode the prop name as
1075                          * userquota@<hex-rid>-domain, to make it easy
1076                          * for the kernel to decode.
1077                          */
1078                         (void) snprintf(newpropname, sizeof (newpropname),
1079                             "%s%llx-%s", zfs_userquota_prop_prefixes[uqtype],
1080                             (longlong_t)rid, domain);
1081                         valary[0] = uqtype;
1082                         valary[1] = rid;
1083                         valary[2] = intval;
1084                         if (nvlist_add_uint64_array(ret, newpropname,
1085                             valary, 3) != 0) {
1086                                 (void) no_memory(hdl);
1087                                 goto error;
1088                         }
1089                         continue;
1090                 } else if (prop == ZPROP_INVAL && zfs_prop_written(propname)) {
1091                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1092                             "'%s' is readonly"),
1093                             propname);
1094                         (void) zfs_error(hdl, EZFS_PROPREADONLY, errbuf);
1095                         goto error;
1096                 }
1097
1098                 if (prop == ZPROP_INVAL) {
1099                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1100                             "invalid property '%s'"), propname);
1101                         (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1102                         goto error;
1103                 }
1104
1105                 if (!zfs_prop_valid_for_type(prop, type)) {
1106                         zfs_error_aux(hdl,
1107                             dgettext(TEXT_DOMAIN, "'%s' does not "
1108                             "apply to datasets of this type"), propname);
1109                         (void) zfs_error(hdl, EZFS_PROPTYPE, errbuf);
1110                         goto error;
1111                 }
1112
1113                 if (zfs_prop_readonly(prop) &&
1114                     (!zfs_prop_setonce(prop) || zhp != NULL)) {
1115                         zfs_error_aux(hdl,
1116                             dgettext(TEXT_DOMAIN, "'%s' is readonly"),
1117                             propname);
1118                         (void) zfs_error(hdl, EZFS_PROPREADONLY, errbuf);
1119                         goto error;
1120                 }
1121
1122                 if (zprop_parse_value(hdl, elem, prop, type, ret,
1123                     &strval, &intval, errbuf) != 0)
1124                         goto error;
1125
1126                 /*
1127                  * Perform some additional checks for specific properties.
1128                  */
1129                 switch (prop) {
1130                 case ZFS_PROP_VERSION:
1131                 {
1132                         int version;
1133
1134                         if (zhp == NULL)
1135                                 break;
1136                         version = zfs_prop_get_int(zhp, ZFS_PROP_VERSION);
1137                         if (intval < version) {
1138                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1139                                     "Can not downgrade; already at version %u"),
1140                                     version);
1141                                 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1142                                 goto error;
1143                         }
1144                         break;
1145                 }
1146
1147                 case ZFS_PROP_VOLBLOCKSIZE:
1148                 case ZFS_PROP_RECORDSIZE:
1149                 {
1150                         int maxbs = SPA_MAXBLOCKSIZE;
1151                         if (zpool_hdl != NULL) {
1152                                 maxbs = zpool_get_prop_int(zpool_hdl,
1153                                     ZPOOL_PROP_MAXBLOCKSIZE, NULL);
1154                         }
1155                         /*
1156                          * Volumes are limited to a volblocksize of 128KB,
1157                          * because they typically service workloads with
1158                          * small random writes, which incur a large performance
1159                          * penalty with large blocks.
1160                          */
1161                         if (prop == ZFS_PROP_VOLBLOCKSIZE)
1162                                 maxbs = SPA_OLD_MAXBLOCKSIZE;
1163                         /*
1164                          * The value must be a power of two between
1165                          * SPA_MINBLOCKSIZE and maxbs.
1166                          */
1167                         if (intval < SPA_MINBLOCKSIZE ||
1168                             intval > maxbs || !ISP2(intval)) {
1169                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1170                                     "'%s' must be power of 2 from 512B "
1171                                     "to %uKB"), propname, maxbs >> 10);
1172                                 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1173                                 goto error;
1174                         }
1175                         break;
1176                 }
1177                 case ZFS_PROP_MLSLABEL:
1178                 {
1179 #ifdef illumos
1180                         /*
1181                          * Verify the mlslabel string and convert to
1182                          * internal hex label string.
1183                          */
1184
1185                         m_label_t *new_sl;
1186                         char *hex = NULL;       /* internal label string */
1187
1188                         /* Default value is already OK. */
1189                         if (strcasecmp(strval, ZFS_MLSLABEL_DEFAULT) == 0)
1190                                 break;
1191
1192                         /* Verify the label can be converted to binary form */
1193                         if (((new_sl = m_label_alloc(MAC_LABEL)) == NULL) ||
1194                             (str_to_label(strval, &new_sl, MAC_LABEL,
1195                             L_NO_CORRECTION, NULL) == -1)) {
1196                                 goto badlabel;
1197                         }
1198
1199                         /* Now translate to hex internal label string */
1200                         if (label_to_str(new_sl, &hex, M_INTERNAL,
1201                             DEF_NAMES) != 0) {
1202                                 if (hex)
1203                                         free(hex);
1204                                 goto badlabel;
1205                         }
1206                         m_label_free(new_sl);
1207
1208                         /* If string is already in internal form, we're done. */
1209                         if (strcmp(strval, hex) == 0) {
1210                                 free(hex);
1211                                 break;
1212                         }
1213
1214                         /* Replace the label string with the internal form. */
1215                         (void) nvlist_remove(ret, zfs_prop_to_name(prop),
1216                             DATA_TYPE_STRING);
1217                         verify(nvlist_add_string(ret, zfs_prop_to_name(prop),
1218                             hex) == 0);
1219                         free(hex);
1220
1221                         break;
1222
1223 badlabel:
1224                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1225                             "invalid mlslabel '%s'"), strval);
1226                         (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1227                         m_label_free(new_sl);   /* OK if null */
1228 #else   /* !illumos */
1229                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1230                             "mlslabel is not supported on FreeBSD"));
1231                         (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1232 #endif  /* illumos */
1233                         goto error;
1234
1235                 }
1236
1237                 case ZFS_PROP_MOUNTPOINT:
1238                 {
1239                         namecheck_err_t why;
1240
1241                         if (strcmp(strval, ZFS_MOUNTPOINT_NONE) == 0 ||
1242                             strcmp(strval, ZFS_MOUNTPOINT_LEGACY) == 0)
1243                                 break;
1244
1245                         if (mountpoint_namecheck(strval, &why)) {
1246                                 switch (why) {
1247                                 case NAME_ERR_LEADING_SLASH:
1248                                         zfs_error_aux(hdl,
1249                                             dgettext(TEXT_DOMAIN,
1250                                             "'%s' must be an absolute path, "
1251                                             "'none', or 'legacy'"), propname);
1252                                         break;
1253                                 case NAME_ERR_TOOLONG:
1254                                         zfs_error_aux(hdl,
1255                                             dgettext(TEXT_DOMAIN,
1256                                             "component of '%s' is too long"),
1257                                             propname);
1258                                         break;
1259
1260                                 default:
1261                                         zfs_error_aux(hdl,
1262                                             dgettext(TEXT_DOMAIN,
1263                                             "(%d) not defined"),
1264                                             why);
1265                                         break;
1266                                 }
1267                                 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1268                                 goto error;
1269                         }
1270                 }
1271
1272                         /*FALLTHRU*/
1273
1274                 case ZFS_PROP_SHARESMB:
1275                 case ZFS_PROP_SHARENFS:
1276                         /*
1277                          * For the mountpoint and sharenfs or sharesmb
1278                          * properties, check if it can be set in a
1279                          * global/non-global zone based on
1280                          * the zoned property value:
1281                          *
1282                          *              global zone         non-global zone
1283                          * --------------------------------------------------
1284                          * zoned=on     mountpoint (no)     mountpoint (yes)
1285                          *              sharenfs (no)       sharenfs (no)
1286                          *              sharesmb (no)       sharesmb (no)
1287                          *
1288                          * zoned=off    mountpoint (yes)        N/A
1289                          *              sharenfs (yes)
1290                          *              sharesmb (yes)
1291                          */
1292                         if (zoned) {
1293                                 if (getzoneid() == GLOBAL_ZONEID) {
1294                                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1295                                             "'%s' cannot be set on "
1296                                             "dataset in a non-global zone"),
1297                                             propname);
1298                                         (void) zfs_error(hdl, EZFS_ZONED,
1299                                             errbuf);
1300                                         goto error;
1301                                 } else if (prop == ZFS_PROP_SHARENFS ||
1302                                     prop == ZFS_PROP_SHARESMB) {
1303                                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1304                                             "'%s' cannot be set in "
1305                                             "a non-global zone"), propname);
1306                                         (void) zfs_error(hdl, EZFS_ZONED,
1307                                             errbuf);
1308                                         goto error;
1309                                 }
1310                         } else if (getzoneid() != GLOBAL_ZONEID) {
1311                                 /*
1312                                  * If zoned property is 'off', this must be in
1313                                  * a global zone. If not, something is wrong.
1314                                  */
1315                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1316                                     "'%s' cannot be set while dataset "
1317                                     "'zoned' property is set"), propname);
1318                                 (void) zfs_error(hdl, EZFS_ZONED, errbuf);
1319                                 goto error;
1320                         }
1321
1322                         /*
1323                          * At this point, it is legitimate to set the
1324                          * property. Now we want to make sure that the
1325                          * property value is valid if it is sharenfs.
1326                          */
1327                         if ((prop == ZFS_PROP_SHARENFS ||
1328                             prop == ZFS_PROP_SHARESMB) &&
1329                             strcmp(strval, "on") != 0 &&
1330                             strcmp(strval, "off") != 0) {
1331                                 zfs_share_proto_t proto;
1332
1333                                 if (prop == ZFS_PROP_SHARESMB)
1334                                         proto = PROTO_SMB;
1335                                 else
1336                                         proto = PROTO_NFS;
1337
1338                                 /*
1339                                  * Must be an valid sharing protocol
1340                                  * option string so init the libshare
1341                                  * in order to enable the parser and
1342                                  * then parse the options. We use the
1343                                  * control API since we don't care about
1344                                  * the current configuration and don't
1345                                  * want the overhead of loading it
1346                                  * until we actually do something.
1347                                  */
1348
1349                                 if (zfs_init_libshare(hdl,
1350                                     SA_INIT_CONTROL_API) != SA_OK) {
1351                                         /*
1352                                          * An error occurred so we can't do
1353                                          * anything
1354                                          */
1355                                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1356                                             "'%s' cannot be set: problem "
1357                                             "in share initialization"),
1358                                             propname);
1359                                         (void) zfs_error(hdl, EZFS_BADPROP,
1360                                             errbuf);
1361                                         goto error;
1362                                 }
1363
1364                                 if (zfs_parse_options(strval, proto) != SA_OK) {
1365                                         /*
1366                                          * There was an error in parsing so
1367                                          * deal with it by issuing an error
1368                                          * message and leaving after
1369                                          * uninitializing the the libshare
1370                                          * interface.
1371                                          */
1372                                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1373                                             "'%s' cannot be set to invalid "
1374                                             "options"), propname);
1375                                         (void) zfs_error(hdl, EZFS_BADPROP,
1376                                             errbuf);
1377                                         zfs_uninit_libshare(hdl);
1378                                         goto error;
1379                                 }
1380                                 zfs_uninit_libshare(hdl);
1381                         }
1382
1383                         break;
1384
1385                 case ZFS_PROP_UTF8ONLY:
1386                         chosen_utf = (int)intval;
1387                         break;
1388
1389                 case ZFS_PROP_NORMALIZE:
1390                         chosen_normal = (int)intval;
1391                         break;
1392
1393                 default:
1394                         break;
1395                 }
1396
1397                 /*
1398                  * For changes to existing volumes, we have some additional
1399                  * checks to enforce.
1400                  */
1401                 if (type == ZFS_TYPE_VOLUME && zhp != NULL) {
1402                         uint64_t volsize = zfs_prop_get_int(zhp,
1403                             ZFS_PROP_VOLSIZE);
1404                         uint64_t blocksize = zfs_prop_get_int(zhp,
1405                             ZFS_PROP_VOLBLOCKSIZE);
1406                         char buf[64];
1407
1408                         switch (prop) {
1409                         case ZFS_PROP_RESERVATION:
1410                                 if (intval > volsize) {
1411                                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1412                                             "'%s' is greater than current "
1413                                             "volume size"), propname);
1414                                         (void) zfs_error(hdl, EZFS_BADPROP,
1415                                             errbuf);
1416                                         goto error;
1417                                 }
1418                                 break;
1419
1420                         case ZFS_PROP_REFRESERVATION:
1421                                 if (intval > volsize && intval != UINT64_MAX) {
1422                                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1423                                             "'%s' is greater than current "
1424                                             "volume size"), propname);
1425                                         (void) zfs_error(hdl, EZFS_BADPROP,
1426                                             errbuf);
1427                                         goto error;
1428                                 }
1429                                 break;
1430
1431                         case ZFS_PROP_VOLSIZE:
1432                                 if (intval % blocksize != 0) {
1433                                         zfs_nicenum(blocksize, buf,
1434                                             sizeof (buf));
1435                                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1436                                             "'%s' must be a multiple of "
1437                                             "volume block size (%s)"),
1438                                             propname, buf);
1439                                         (void) zfs_error(hdl, EZFS_BADPROP,
1440                                             errbuf);
1441                                         goto error;
1442                                 }
1443
1444                                 if (intval == 0) {
1445                                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1446                                             "'%s' cannot be zero"),
1447                                             propname);
1448                                         (void) zfs_error(hdl, EZFS_BADPROP,
1449                                             errbuf);
1450                                         goto error;
1451                                 }
1452                                 break;
1453
1454                         default:
1455                                 break;
1456                         }
1457                 }
1458         }
1459
1460         /*
1461          * If normalization was chosen, but no UTF8 choice was made,
1462          * enforce rejection of non-UTF8 names.
1463          *
1464          * If normalization was chosen, but rejecting non-UTF8 names
1465          * was explicitly not chosen, it is an error.
1466          */
1467         if (chosen_normal > 0 && chosen_utf < 0) {
1468                 if (nvlist_add_uint64(ret,
1469                     zfs_prop_to_name(ZFS_PROP_UTF8ONLY), 1) != 0) {
1470                         (void) no_memory(hdl);
1471                         goto error;
1472                 }
1473         } else if (chosen_normal > 0 && chosen_utf == 0) {
1474                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1475                     "'%s' must be set 'on' if normalization chosen"),
1476                     zfs_prop_to_name(ZFS_PROP_UTF8ONLY));
1477                 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1478                 goto error;
1479         }
1480         return (ret);
1481
1482 error:
1483         nvlist_free(ret);
1484         return (NULL);
1485 }
1486
1487 int
1488 zfs_add_synthetic_resv(zfs_handle_t *zhp, nvlist_t *nvl)
1489 {
1490         uint64_t old_volsize;
1491         uint64_t new_volsize;
1492         uint64_t old_reservation;
1493         uint64_t new_reservation;
1494         zfs_prop_t resv_prop;
1495         nvlist_t *props;
1496
1497         /*
1498          * If this is an existing volume, and someone is setting the volsize,
1499          * make sure that it matches the reservation, or add it if necessary.
1500          */
1501         old_volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE);
1502         if (zfs_which_resv_prop(zhp, &resv_prop) < 0)
1503                 return (-1);
1504         old_reservation = zfs_prop_get_int(zhp, resv_prop);
1505
1506         props = fnvlist_alloc();
1507         fnvlist_add_uint64(props, zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE),
1508             zfs_prop_get_int(zhp, ZFS_PROP_VOLBLOCKSIZE));
1509
1510         if ((zvol_volsize_to_reservation(old_volsize, props) !=
1511             old_reservation) || nvlist_exists(nvl,
1512             zfs_prop_to_name(resv_prop))) {
1513                 fnvlist_free(props);
1514                 return (0);
1515         }
1516         if (nvlist_lookup_uint64(nvl, zfs_prop_to_name(ZFS_PROP_VOLSIZE),
1517             &new_volsize) != 0) {
1518                 fnvlist_free(props);
1519                 return (-1);
1520         }
1521         new_reservation = zvol_volsize_to_reservation(new_volsize, props);
1522         fnvlist_free(props);
1523
1524         if (nvlist_add_uint64(nvl, zfs_prop_to_name(resv_prop),
1525             new_reservation) != 0) {
1526                 (void) no_memory(zhp->zfs_hdl);
1527                 return (-1);
1528         }
1529         return (1);
1530 }
1531
1532 /*
1533  * Helper for 'zfs {set|clone} refreservation=auto'.  Must be called after
1534  * zfs_valid_proplist(), as it is what sets the UINT64_MAX sentinal value.
1535  * Return codes must match zfs_add_synthetic_resv().
1536  */
1537 static int
1538 zfs_fix_auto_resv(zfs_handle_t *zhp, nvlist_t *nvl)
1539 {
1540         uint64_t volsize;
1541         uint64_t resvsize;
1542         zfs_prop_t prop;
1543         nvlist_t *props;
1544
1545         if (!ZFS_IS_VOLUME(zhp)) {
1546                 return (0);
1547         }
1548
1549         if (zfs_which_resv_prop(zhp, &prop) != 0) {
1550                 return (-1);
1551         }
1552
1553         if (prop != ZFS_PROP_REFRESERVATION) {
1554                 return (0);
1555         }
1556
1557         if (nvlist_lookup_uint64(nvl, zfs_prop_to_name(prop), &resvsize) != 0) {
1558                 /* No value being set, so it can't be "auto" */
1559                 return (0);
1560         }
1561         if (resvsize != UINT64_MAX) {
1562                 /* Being set to a value other than "auto" */
1563                 return (0);
1564         }
1565
1566         props = fnvlist_alloc();
1567
1568         fnvlist_add_uint64(props, zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE),
1569             zfs_prop_get_int(zhp, ZFS_PROP_VOLBLOCKSIZE));
1570
1571         if (nvlist_lookup_uint64(nvl, zfs_prop_to_name(ZFS_PROP_VOLSIZE),
1572             &volsize) != 0) {
1573                 volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE);
1574         }
1575
1576         resvsize = zvol_volsize_to_reservation(volsize, props);
1577         fnvlist_free(props);
1578
1579         (void) nvlist_remove_all(nvl, zfs_prop_to_name(prop));
1580         if (nvlist_add_uint64(nvl, zfs_prop_to_name(prop), resvsize) != 0) {
1581                 (void) no_memory(zhp->zfs_hdl);
1582                 return (-1);
1583         }
1584         return (1);
1585 }
1586
1587 void
1588 zfs_setprop_error(libzfs_handle_t *hdl, zfs_prop_t prop, int err,
1589     char *errbuf)
1590 {
1591         switch (err) {
1592
1593         case ENOSPC:
1594                 /*
1595                  * For quotas and reservations, ENOSPC indicates
1596                  * something different; setting a quota or reservation
1597                  * doesn't use any disk space.
1598                  */
1599                 switch (prop) {
1600                 case ZFS_PROP_QUOTA:
1601                 case ZFS_PROP_REFQUOTA:
1602                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1603                             "size is less than current used or "
1604                             "reserved space"));
1605                         (void) zfs_error(hdl, EZFS_PROPSPACE, errbuf);
1606                         break;
1607
1608                 case ZFS_PROP_RESERVATION:
1609                 case ZFS_PROP_REFRESERVATION:
1610                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1611                             "size is greater than available space"));
1612                         (void) zfs_error(hdl, EZFS_PROPSPACE, errbuf);
1613                         break;
1614
1615                 default:
1616                         (void) zfs_standard_error(hdl, err, errbuf);
1617                         break;
1618                 }
1619                 break;
1620
1621         case EBUSY:
1622                 (void) zfs_standard_error(hdl, EBUSY, errbuf);
1623                 break;
1624
1625         case EROFS:
1626                 (void) zfs_error(hdl, EZFS_DSREADONLY, errbuf);
1627                 break;
1628
1629         case E2BIG:
1630                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1631                     "property value too long"));
1632                 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1633                 break;
1634
1635         case ENOTSUP:
1636                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1637                     "pool and or dataset must be upgraded to set this "
1638                     "property or value"));
1639                 (void) zfs_error(hdl, EZFS_BADVERSION, errbuf);
1640                 break;
1641
1642         case ERANGE:
1643         case EDOM:
1644                 if (prop == ZFS_PROP_COMPRESSION ||
1645                     prop == ZFS_PROP_RECORDSIZE) {
1646                         (void) zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1647                             "property setting is not allowed on "
1648                             "bootable datasets"));
1649                         (void) zfs_error(hdl, EZFS_NOTSUP, errbuf);
1650                 } else if (prop == ZFS_PROP_CHECKSUM ||
1651                     prop == ZFS_PROP_DEDUP) {
1652                         (void) zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1653                             "property setting is not allowed on "
1654                             "root pools"));
1655                         (void) zfs_error(hdl, EZFS_NOTSUP, errbuf);
1656                 } else {
1657                         (void) zfs_standard_error(hdl, err, errbuf);
1658                 }
1659                 break;
1660
1661         case EINVAL:
1662                 if (prop == ZPROP_INVAL) {
1663                         (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1664                 } else {
1665                         (void) zfs_standard_error(hdl, err, errbuf);
1666                 }
1667                 break;
1668
1669         case EOVERFLOW:
1670                 /*
1671                  * This platform can't address a volume this big.
1672                  */
1673 #ifdef _ILP32
1674                 if (prop == ZFS_PROP_VOLSIZE) {
1675                         (void) zfs_error(hdl, EZFS_VOLTOOBIG, errbuf);
1676                         break;
1677                 }
1678 #endif
1679                 /* FALLTHROUGH */
1680         default:
1681                 (void) zfs_standard_error(hdl, err, errbuf);
1682         }
1683 }
1684
1685 /*
1686  * Given a property name and value, set the property for the given dataset.
1687  */
1688 int
1689 zfs_prop_set(zfs_handle_t *zhp, const char *propname, const char *propval)
1690 {
1691         int ret = -1;
1692         char errbuf[1024];
1693         libzfs_handle_t *hdl = zhp->zfs_hdl;
1694         nvlist_t *nvl = NULL;
1695
1696         (void) snprintf(errbuf, sizeof (errbuf),
1697             dgettext(TEXT_DOMAIN, "cannot set property for '%s'"),
1698             zhp->zfs_name);
1699
1700         if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0) != 0 ||
1701             nvlist_add_string(nvl, propname, propval) != 0) {
1702                 (void) no_memory(hdl);
1703                 goto error;
1704         }
1705
1706         ret = zfs_prop_set_list(zhp, nvl);
1707
1708 error:
1709         nvlist_free(nvl);
1710         return (ret);
1711 }
1712
1713
1714
1715 /*
1716  * Given an nvlist of property names and values, set the properties for the
1717  * given dataset.
1718  */
1719 int
1720 zfs_prop_set_list(zfs_handle_t *zhp, nvlist_t *props)
1721 {
1722         zfs_cmd_t zc = { 0 };
1723         int ret = -1;
1724         prop_changelist_t **cls = NULL;
1725         int cl_idx;
1726         char errbuf[1024];
1727         libzfs_handle_t *hdl = zhp->zfs_hdl;
1728         nvlist_t *nvl;
1729         int nvl_len;
1730         int added_resv = 0;
1731
1732         (void) snprintf(errbuf, sizeof (errbuf),
1733             dgettext(TEXT_DOMAIN, "cannot set property for '%s'"),
1734             zhp->zfs_name);
1735
1736         if ((nvl = zfs_valid_proplist(hdl, zhp->zfs_type, props,
1737             zfs_prop_get_int(zhp, ZFS_PROP_ZONED), zhp, zhp->zpool_hdl,
1738             errbuf)) == NULL)
1739                 goto error;
1740
1741         /*
1742          * We have to check for any extra properties which need to be added
1743          * before computing the length of the nvlist.
1744          */
1745         for (nvpair_t *elem = nvlist_next_nvpair(nvl, NULL);
1746             elem != NULL;
1747             elem = nvlist_next_nvpair(nvl, elem)) {
1748                 if (zfs_name_to_prop(nvpair_name(elem)) == ZFS_PROP_VOLSIZE &&
1749                     (added_resv = zfs_add_synthetic_resv(zhp, nvl)) == -1) {
1750                         goto error;
1751                 }
1752         }
1753
1754         if (added_resv != 1 &&
1755             (added_resv = zfs_fix_auto_resv(zhp, nvl)) == -1) {
1756                 goto error;
1757         }
1758
1759         /*
1760          * Check how many properties we're setting and allocate an array to
1761          * store changelist pointers for postfix().
1762          */
1763         nvl_len = 0;
1764         for (nvpair_t *elem = nvlist_next_nvpair(nvl, NULL);
1765             elem != NULL;
1766             elem = nvlist_next_nvpair(nvl, elem))
1767                 nvl_len++;
1768         if ((cls = calloc(nvl_len, sizeof (prop_changelist_t *))) == NULL)
1769                 goto error;
1770
1771         cl_idx = 0;
1772         for (nvpair_t *elem = nvlist_next_nvpair(nvl, NULL);
1773             elem != NULL;
1774             elem = nvlist_next_nvpair(nvl, elem)) {
1775
1776                 zfs_prop_t prop = zfs_name_to_prop(nvpair_name(elem));
1777
1778                 assert(cl_idx < nvl_len);
1779                 /*
1780                  * We don't want to unmount & remount the dataset when changing
1781                  * its canmount property to 'on' or 'noauto'.  We only use
1782                  * the changelist logic to unmount when setting canmount=off.
1783                  */
1784                 if (prop != ZFS_PROP_CANMOUNT ||
1785                     (fnvpair_value_uint64(elem) == ZFS_CANMOUNT_OFF &&
1786                     zfs_is_mounted(zhp, NULL))) {
1787                         cls[cl_idx] = changelist_gather(zhp, prop, 0, 0);
1788                         if (cls[cl_idx] == NULL)
1789                                 goto error;
1790                 }
1791
1792                 if (prop == ZFS_PROP_MOUNTPOINT &&
1793                     changelist_haszonedchild(cls[cl_idx])) {
1794                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1795                             "child dataset with inherited mountpoint is used "
1796                             "in a non-global zone"));
1797                         ret = zfs_error(hdl, EZFS_ZONED, errbuf);
1798                         goto error;
1799                 }
1800
1801                 /* We don't support those properties on FreeBSD. */
1802                 switch (prop) {
1803                 case ZFS_PROP_DEVICES:
1804                 case ZFS_PROP_ISCSIOPTIONS:
1805                 case ZFS_PROP_XATTR:
1806                 case ZFS_PROP_VSCAN:
1807                 case ZFS_PROP_NBMAND:
1808                 case ZFS_PROP_MLSLABEL:
1809                         (void) snprintf(errbuf, sizeof (errbuf),
1810                             "property '%s' not supported on FreeBSD",
1811                             nvpair_name(elem));
1812                         ret = zfs_error(hdl, EZFS_PERM, errbuf);
1813                         goto error;
1814                 }
1815
1816                 if (cls[cl_idx] != NULL &&
1817                     (ret = changelist_prefix(cls[cl_idx])) != 0)
1818                         goto error;
1819
1820                 cl_idx++;
1821         }
1822         assert(cl_idx == nvl_len);
1823
1824         /*
1825          * Execute the corresponding ioctl() to set this list of properties.
1826          */
1827         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
1828
1829         if ((ret = zcmd_write_src_nvlist(hdl, &zc, nvl)) != 0 ||
1830             (ret = zcmd_alloc_dst_nvlist(hdl, &zc, 0)) != 0)
1831                 goto error;
1832
1833         ret = zfs_ioctl(hdl, ZFS_IOC_SET_PROP, &zc);
1834
1835         if (ret != 0) {
1836                 /* Get the list of unset properties back and report them. */
1837                 nvlist_t *errorprops = NULL;
1838                 if (zcmd_read_dst_nvlist(hdl, &zc, &errorprops) != 0)
1839                         goto error;
1840                 for (nvpair_t *elem = nvlist_next_nvpair(nvl, NULL);
1841                     elem != NULL;
1842                     elem = nvlist_next_nvpair(nvl, elem)) {
1843                         zfs_prop_t prop = zfs_name_to_prop(nvpair_name(elem));
1844                         zfs_setprop_error(hdl, prop, errno, errbuf);
1845                 }
1846                 nvlist_free(errorprops);
1847
1848                 if (added_resv && errno == ENOSPC) {
1849                         /* clean up the volsize property we tried to set */
1850                         uint64_t old_volsize = zfs_prop_get_int(zhp,
1851                             ZFS_PROP_VOLSIZE);
1852                         nvlist_free(nvl);
1853                         nvl = NULL;
1854                         zcmd_free_nvlists(&zc);
1855
1856                         if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0) != 0)
1857                                 goto error;
1858                         if (nvlist_add_uint64(nvl,
1859                             zfs_prop_to_name(ZFS_PROP_VOLSIZE),
1860                             old_volsize) != 0)
1861                                 goto error;
1862                         if (zcmd_write_src_nvlist(hdl, &zc, nvl) != 0)
1863                                 goto error;
1864                         (void) zfs_ioctl(hdl, ZFS_IOC_SET_PROP, &zc);
1865                 }
1866         } else {
1867                 for (cl_idx = 0; cl_idx < nvl_len; cl_idx++) {
1868                         if (cls[cl_idx] != NULL) {
1869                                 int clp_err = changelist_postfix(cls[cl_idx]);
1870                                 if (clp_err != 0)
1871                                         ret = clp_err;
1872                         }
1873                 }
1874
1875                 /*
1876                  * Refresh the statistics so the new property value
1877                  * is reflected.
1878                  */
1879                 if (ret == 0)
1880                         (void) get_stats(zhp);
1881         }
1882
1883 error:
1884         nvlist_free(nvl);
1885         zcmd_free_nvlists(&zc);
1886         if (cls != NULL) {
1887                 for (cl_idx = 0; cl_idx < nvl_len; cl_idx++) {
1888                         if (cls[cl_idx] != NULL)
1889                                 changelist_free(cls[cl_idx]);
1890                 }
1891                 free(cls);
1892         }
1893         return (ret);
1894 }
1895
1896 /*
1897  * Given a property, inherit the value from the parent dataset, or if received
1898  * is TRUE, revert to the received value, if any.
1899  */
1900 int
1901 zfs_prop_inherit(zfs_handle_t *zhp, const char *propname, boolean_t received)
1902 {
1903         zfs_cmd_t zc = { 0 };
1904         int ret;
1905         prop_changelist_t *cl;
1906         libzfs_handle_t *hdl = zhp->zfs_hdl;
1907         char errbuf[1024];
1908         zfs_prop_t prop;
1909
1910         (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
1911             "cannot inherit %s for '%s'"), propname, zhp->zfs_name);
1912
1913         zc.zc_cookie = received;
1914         if ((prop = zfs_name_to_prop(propname)) == ZPROP_INVAL) {
1915                 /*
1916                  * For user properties, the amount of work we have to do is very
1917                  * small, so just do it here.
1918                  */
1919                 if (!zfs_prop_user(propname)) {
1920                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1921                             "invalid property"));
1922                         return (zfs_error(hdl, EZFS_BADPROP, errbuf));
1923                 }
1924
1925                 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
1926                 (void) strlcpy(zc.zc_value, propname, sizeof (zc.zc_value));
1927
1928                 if (zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_INHERIT_PROP, &zc) != 0)
1929                         return (zfs_standard_error(hdl, errno, errbuf));
1930
1931                 return (0);
1932         }
1933
1934         /*
1935          * Verify that this property is inheritable.
1936          */
1937         if (zfs_prop_readonly(prop))
1938                 return (zfs_error(hdl, EZFS_PROPREADONLY, errbuf));
1939
1940         if (!zfs_prop_inheritable(prop) && !received)
1941                 return (zfs_error(hdl, EZFS_PROPNONINHERIT, errbuf));
1942
1943         /*
1944          * Check to see if the value applies to this type
1945          */
1946         if (!zfs_prop_valid_for_type(prop, zhp->zfs_type))
1947                 return (zfs_error(hdl, EZFS_PROPTYPE, errbuf));
1948
1949         /*
1950          * Normalize the name, to get rid of shorthand abbreviations.
1951          */
1952         propname = zfs_prop_to_name(prop);
1953         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
1954         (void) strlcpy(zc.zc_value, propname, sizeof (zc.zc_value));
1955
1956         if (prop == ZFS_PROP_MOUNTPOINT && getzoneid() == GLOBAL_ZONEID &&
1957             zfs_prop_get_int(zhp, ZFS_PROP_ZONED)) {
1958                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1959                     "dataset is used in a non-global zone"));
1960                 return (zfs_error(hdl, EZFS_ZONED, errbuf));
1961         }
1962
1963         /*
1964          * Determine datasets which will be affected by this change, if any.
1965          */
1966         if ((cl = changelist_gather(zhp, prop, 0, 0)) == NULL)
1967                 return (-1);
1968
1969         if (prop == ZFS_PROP_MOUNTPOINT && changelist_haszonedchild(cl)) {
1970                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1971                     "child dataset with inherited mountpoint is used "
1972                     "in a non-global zone"));
1973                 ret = zfs_error(hdl, EZFS_ZONED, errbuf);
1974                 goto error;
1975         }
1976
1977         if ((ret = changelist_prefix(cl)) != 0)
1978                 goto error;
1979
1980         if ((ret = zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_INHERIT_PROP, &zc)) != 0) {
1981                 return (zfs_standard_error(hdl, errno, errbuf));
1982         } else {
1983
1984                 if ((ret = changelist_postfix(cl)) != 0)
1985                         goto error;
1986
1987                 /*
1988                  * Refresh the statistics so the new property is reflected.
1989                  */
1990                 (void) get_stats(zhp);
1991         }
1992
1993 error:
1994         changelist_free(cl);
1995         return (ret);
1996 }
1997
1998 /*
1999  * True DSL properties are stored in an nvlist.  The following two functions
2000  * extract them appropriately.
2001  */
2002 static uint64_t
2003 getprop_uint64(zfs_handle_t *zhp, zfs_prop_t prop, char **source)
2004 {
2005         nvlist_t *nv;
2006         uint64_t value;
2007
2008         *source = NULL;
2009         if (nvlist_lookup_nvlist(zhp->zfs_props,
2010             zfs_prop_to_name(prop), &nv) == 0) {
2011                 verify(nvlist_lookup_uint64(nv, ZPROP_VALUE, &value) == 0);
2012                 (void) nvlist_lookup_string(nv, ZPROP_SOURCE, source);
2013         } else {
2014                 verify(!zhp->zfs_props_table ||
2015                     zhp->zfs_props_table[prop] == B_TRUE);
2016                 value = zfs_prop_default_numeric(prop);
2017                 *source = "";
2018         }
2019
2020         return (value);
2021 }
2022
2023 static const char *
2024 getprop_string(zfs_handle_t *zhp, zfs_prop_t prop, char **source)
2025 {
2026         nvlist_t *nv;
2027         const char *value;
2028
2029         *source = NULL;
2030         if (nvlist_lookup_nvlist(zhp->zfs_props,
2031             zfs_prop_to_name(prop), &nv) == 0) {
2032                 value = fnvlist_lookup_string(nv, ZPROP_VALUE);
2033                 (void) nvlist_lookup_string(nv, ZPROP_SOURCE, source);
2034         } else {
2035                 verify(!zhp->zfs_props_table ||
2036                     zhp->zfs_props_table[prop] == B_TRUE);
2037                 value = zfs_prop_default_string(prop);
2038                 *source = "";
2039         }
2040
2041         return (value);
2042 }
2043
2044 static boolean_t
2045 zfs_is_recvd_props_mode(zfs_handle_t *zhp)
2046 {
2047         return (zhp->zfs_props == zhp->zfs_recvd_props);
2048 }
2049
2050 static void
2051 zfs_set_recvd_props_mode(zfs_handle_t *zhp, uint64_t *cookie)
2052 {
2053         *cookie = (uint64_t)(uintptr_t)zhp->zfs_props;
2054         zhp->zfs_props = zhp->zfs_recvd_props;
2055 }
2056
2057 static void
2058 zfs_unset_recvd_props_mode(zfs_handle_t *zhp, uint64_t *cookie)
2059 {
2060         zhp->zfs_props = (nvlist_t *)(uintptr_t)*cookie;
2061         *cookie = 0;
2062 }
2063
2064 /*
2065  * Internal function for getting a numeric property.  Both zfs_prop_get() and
2066  * zfs_prop_get_int() are built using this interface.
2067  *
2068  * Certain properties can be overridden using 'mount -o'.  In this case, scan
2069  * the contents of the /etc/mnttab entry, searching for the appropriate options.
2070  * If they differ from the on-disk values, report the current values and mark
2071  * the source "temporary".
2072  */
2073 static int
2074 get_numeric_property(zfs_handle_t *zhp, zfs_prop_t prop, zprop_source_t *src,
2075     char **source, uint64_t *val)
2076 {
2077         zfs_cmd_t zc = { 0 };
2078         nvlist_t *zplprops = NULL;
2079         struct mnttab mnt;
2080         char *mntopt_on = NULL;
2081         char *mntopt_off = NULL;
2082         boolean_t received = zfs_is_recvd_props_mode(zhp);
2083
2084         *source = NULL;
2085
2086         switch (prop) {
2087         case ZFS_PROP_ATIME:
2088                 mntopt_on = MNTOPT_ATIME;
2089                 mntopt_off = MNTOPT_NOATIME;
2090                 break;
2091
2092         case ZFS_PROP_DEVICES:
2093                 mntopt_on = MNTOPT_DEVICES;
2094                 mntopt_off = MNTOPT_NODEVICES;
2095                 break;
2096
2097         case ZFS_PROP_EXEC:
2098                 mntopt_on = MNTOPT_EXEC;
2099                 mntopt_off = MNTOPT_NOEXEC;
2100                 break;
2101
2102         case ZFS_PROP_READONLY:
2103                 mntopt_on = MNTOPT_RO;
2104                 mntopt_off = MNTOPT_RW;
2105                 break;
2106
2107         case ZFS_PROP_SETUID:
2108                 mntopt_on = MNTOPT_SETUID;
2109                 mntopt_off = MNTOPT_NOSETUID;
2110                 break;
2111
2112         case ZFS_PROP_XATTR:
2113                 mntopt_on = MNTOPT_XATTR;
2114                 mntopt_off = MNTOPT_NOXATTR;
2115                 break;
2116
2117         case ZFS_PROP_NBMAND:
2118                 mntopt_on = MNTOPT_NBMAND;
2119                 mntopt_off = MNTOPT_NONBMAND;
2120                 break;
2121
2122         default:
2123                 break;
2124         }
2125
2126         /*
2127          * Because looking up the mount options is potentially expensive
2128          * (iterating over all of /etc/mnttab), we defer its calculation until
2129          * we're looking up a property which requires its presence.
2130          */
2131         if (!zhp->zfs_mntcheck &&
2132             (mntopt_on != NULL || prop == ZFS_PROP_MOUNTED)) {
2133                 libzfs_handle_t *hdl = zhp->zfs_hdl;
2134                 struct mnttab entry;
2135
2136                 if (libzfs_mnttab_find(hdl, zhp->zfs_name, &entry) == 0) {
2137                         zhp->zfs_mntopts = zfs_strdup(hdl,
2138                             entry.mnt_mntopts);
2139                         if (zhp->zfs_mntopts == NULL)
2140                                 return (-1);
2141                 }
2142
2143                 zhp->zfs_mntcheck = B_TRUE;
2144         }
2145
2146         if (zhp->zfs_mntopts == NULL)
2147                 mnt.mnt_mntopts = "";
2148         else
2149                 mnt.mnt_mntopts = zhp->zfs_mntopts;
2150
2151         switch (prop) {
2152         case ZFS_PROP_ATIME:
2153         case ZFS_PROP_DEVICES:
2154         case ZFS_PROP_EXEC:
2155         case ZFS_PROP_READONLY:
2156         case ZFS_PROP_SETUID:
2157         case ZFS_PROP_XATTR:
2158         case ZFS_PROP_NBMAND:
2159                 *val = getprop_uint64(zhp, prop, source);
2160
2161                 if (received)
2162                         break;
2163
2164                 if (hasmntopt(&mnt, mntopt_on) && !*val) {
2165                         *val = B_TRUE;
2166                         if (src)
2167                                 *src = ZPROP_SRC_TEMPORARY;
2168                 } else if (hasmntopt(&mnt, mntopt_off) && *val) {
2169                         *val = B_FALSE;
2170                         if (src)
2171                                 *src = ZPROP_SRC_TEMPORARY;
2172                 }
2173                 break;
2174
2175         case ZFS_PROP_CANMOUNT:
2176         case ZFS_PROP_VOLSIZE:
2177         case ZFS_PROP_QUOTA:
2178         case ZFS_PROP_REFQUOTA:
2179         case ZFS_PROP_RESERVATION:
2180         case ZFS_PROP_REFRESERVATION:
2181         case ZFS_PROP_FILESYSTEM_LIMIT:
2182         case ZFS_PROP_SNAPSHOT_LIMIT:
2183         case ZFS_PROP_FILESYSTEM_COUNT:
2184         case ZFS_PROP_SNAPSHOT_COUNT:
2185                 *val = getprop_uint64(zhp, prop, source);
2186
2187                 if (*source == NULL) {
2188                         /* not default, must be local */
2189                         *source = zhp->zfs_name;
2190                 }
2191                 break;
2192
2193         case ZFS_PROP_MOUNTED:
2194                 *val = (zhp->zfs_mntopts != NULL);
2195                 break;
2196
2197         case ZFS_PROP_NUMCLONES:
2198                 *val = zhp->zfs_dmustats.dds_num_clones;
2199                 break;
2200
2201         case ZFS_PROP_VERSION:
2202         case ZFS_PROP_NORMALIZE:
2203         case ZFS_PROP_UTF8ONLY:
2204         case ZFS_PROP_CASE:
2205                 if (!zfs_prop_valid_for_type(prop, zhp->zfs_head_type) ||
2206                     zcmd_alloc_dst_nvlist(zhp->zfs_hdl, &zc, 0) != 0)
2207                         return (-1);
2208                 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
2209                 if (zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_OBJSET_ZPLPROPS, &zc)) {
2210                         zcmd_free_nvlists(&zc);
2211                         return (-1);
2212                 }
2213                 if (zcmd_read_dst_nvlist(zhp->zfs_hdl, &zc, &zplprops) != 0 ||
2214                     nvlist_lookup_uint64(zplprops, zfs_prop_to_name(prop),
2215                     val) != 0) {
2216                         zcmd_free_nvlists(&zc);
2217                         return (-1);
2218                 }
2219                 nvlist_free(zplprops);
2220                 zcmd_free_nvlists(&zc);
2221                 break;
2222
2223         case ZFS_PROP_INCONSISTENT:
2224                 *val = zhp->zfs_dmustats.dds_inconsistent;
2225                 break;
2226
2227         default:
2228                 switch (zfs_prop_get_type(prop)) {
2229                 case PROP_TYPE_NUMBER:
2230                 case PROP_TYPE_INDEX:
2231                         *val = getprop_uint64(zhp, prop, source);
2232                         /*
2233                          * If we tried to use a default value for a
2234                          * readonly property, it means that it was not
2235                          * present.  Note this only applies to "truly"
2236                          * readonly properties, not set-once properties
2237                          * like volblocksize.
2238                          */
2239                         if (zfs_prop_readonly(prop) &&
2240                             !zfs_prop_setonce(prop) &&
2241                             *source != NULL && (*source)[0] == '\0') {
2242                                 *source = NULL;
2243                                 return (-1);
2244                         }
2245                         break;
2246
2247                 case PROP_TYPE_STRING:
2248                 default:
2249                         zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN,
2250                             "cannot get non-numeric property"));
2251                         return (zfs_error(zhp->zfs_hdl, EZFS_BADPROP,
2252                             dgettext(TEXT_DOMAIN, "internal error")));
2253                 }
2254         }
2255
2256         return (0);
2257 }
2258
2259 /*
2260  * Calculate the source type, given the raw source string.
2261  */
2262 static void
2263 get_source(zfs_handle_t *zhp, zprop_source_t *srctype, char *source,
2264     char *statbuf, size_t statlen)
2265 {
2266         if (statbuf == NULL || *srctype == ZPROP_SRC_TEMPORARY)
2267                 return;
2268
2269         if (source == NULL) {
2270                 *srctype = ZPROP_SRC_NONE;
2271         } else if (source[0] == '\0') {
2272                 *srctype = ZPROP_SRC_DEFAULT;
2273         } else if (strstr(source, ZPROP_SOURCE_VAL_RECVD) != NULL) {
2274                 *srctype = ZPROP_SRC_RECEIVED;
2275         } else {
2276                 if (strcmp(source, zhp->zfs_name) == 0) {
2277                         *srctype = ZPROP_SRC_LOCAL;
2278                 } else {
2279                         (void) strlcpy(statbuf, source, statlen);
2280                         *srctype = ZPROP_SRC_INHERITED;
2281                 }
2282         }
2283
2284 }
2285
2286 int
2287 zfs_prop_get_recvd(zfs_handle_t *zhp, const char *propname, char *propbuf,
2288     size_t proplen, boolean_t literal)
2289 {
2290         zfs_prop_t prop;
2291         int err = 0;
2292
2293         if (zhp->zfs_recvd_props == NULL)
2294                 if (get_recvd_props_ioctl(zhp) != 0)
2295                         return (-1);
2296
2297         prop = zfs_name_to_prop(propname);
2298
2299         if (prop != ZPROP_INVAL) {
2300                 uint64_t cookie;
2301                 if (!nvlist_exists(zhp->zfs_recvd_props, propname))
2302                         return (-1);
2303                 zfs_set_recvd_props_mode(zhp, &cookie);
2304                 err = zfs_prop_get(zhp, prop, propbuf, proplen,
2305                     NULL, NULL, 0, literal);
2306                 zfs_unset_recvd_props_mode(zhp, &cookie);
2307         } else {
2308                 nvlist_t *propval;
2309                 char *recvdval;
2310                 if (nvlist_lookup_nvlist(zhp->zfs_recvd_props,
2311                     propname, &propval) != 0)
2312                         return (-1);
2313                 verify(nvlist_lookup_string(propval, ZPROP_VALUE,
2314                     &recvdval) == 0);
2315                 (void) strlcpy(propbuf, recvdval, proplen);
2316         }
2317
2318         return (err == 0 ? 0 : -1);
2319 }
2320
2321 static int
2322 get_clones_string(zfs_handle_t *zhp, char *propbuf, size_t proplen)
2323 {
2324         nvlist_t *value;
2325         nvpair_t *pair;
2326
2327         value = zfs_get_clones_nvl(zhp);
2328         if (value == NULL)
2329                 return (-1);
2330
2331         propbuf[0] = '\0';
2332         for (pair = nvlist_next_nvpair(value, NULL); pair != NULL;
2333             pair = nvlist_next_nvpair(value, pair)) {
2334                 if (propbuf[0] != '\0')
2335                         (void) strlcat(propbuf, ",", proplen);
2336                 (void) strlcat(propbuf, nvpair_name(pair), proplen);
2337         }
2338
2339         return (0);
2340 }
2341
2342 struct get_clones_arg {
2343         uint64_t numclones;
2344         nvlist_t *value;
2345         const char *origin;
2346         char buf[ZFS_MAX_DATASET_NAME_LEN];
2347 };
2348
2349 int
2350 get_clones_cb(zfs_handle_t *zhp, void *arg)
2351 {
2352         struct get_clones_arg *gca = arg;
2353
2354         if (gca->numclones == 0) {
2355                 zfs_close(zhp);
2356                 return (0);
2357         }
2358
2359         if (zfs_prop_get(zhp, ZFS_PROP_ORIGIN, gca->buf, sizeof (gca->buf),
2360             NULL, NULL, 0, B_TRUE) != 0)
2361                 goto out;
2362         if (strcmp(gca->buf, gca->origin) == 0) {
2363                 fnvlist_add_boolean(gca->value, zfs_get_name(zhp));
2364                 gca->numclones--;
2365         }
2366
2367 out:
2368         (void) zfs_iter_children(zhp, get_clones_cb, gca);
2369         zfs_close(zhp);
2370         return (0);
2371 }
2372
2373 nvlist_t *
2374 zfs_get_clones_nvl(zfs_handle_t *zhp)
2375 {
2376         nvlist_t *nv, *value;
2377
2378         if (nvlist_lookup_nvlist(zhp->zfs_props,
2379             zfs_prop_to_name(ZFS_PROP_CLONES), &nv) != 0) {
2380                 struct get_clones_arg gca;
2381
2382                 /*
2383                  * if this is a snapshot, then the kernel wasn't able
2384                  * to get the clones.  Do it by slowly iterating.
2385                  */
2386                 if (zhp->zfs_type != ZFS_TYPE_SNAPSHOT)
2387                         return (NULL);
2388                 if (nvlist_alloc(&nv, NV_UNIQUE_NAME, 0) != 0)
2389                         return (NULL);
2390                 if (nvlist_alloc(&value, NV_UNIQUE_NAME, 0) != 0) {
2391                         nvlist_free(nv);
2392                         return (NULL);
2393                 }
2394
2395                 gca.numclones = zfs_prop_get_int(zhp, ZFS_PROP_NUMCLONES);
2396                 gca.value = value;
2397                 gca.origin = zhp->zfs_name;
2398
2399                 if (gca.numclones != 0) {
2400                         zfs_handle_t *root;
2401                         char pool[ZFS_MAX_DATASET_NAME_LEN];
2402                         char *cp = pool;
2403
2404                         /* get the pool name */
2405                         (void) strlcpy(pool, zhp->zfs_name, sizeof (pool));
2406                         (void) strsep(&cp, "/@");
2407                         root = zfs_open(zhp->zfs_hdl, pool,
2408                             ZFS_TYPE_FILESYSTEM);
2409
2410                         (void) get_clones_cb(root, &gca);
2411                 }
2412
2413                 if (gca.numclones != 0 ||
2414                     nvlist_add_nvlist(nv, ZPROP_VALUE, value) != 0 ||
2415                     nvlist_add_nvlist(zhp->zfs_props,
2416                     zfs_prop_to_name(ZFS_PROP_CLONES), nv) != 0) {
2417                         nvlist_free(nv);
2418                         nvlist_free(value);
2419                         return (NULL);
2420                 }
2421                 nvlist_free(nv);
2422                 nvlist_free(value);
2423                 verify(0 == nvlist_lookup_nvlist(zhp->zfs_props,
2424                     zfs_prop_to_name(ZFS_PROP_CLONES), &nv));
2425         }
2426
2427         verify(nvlist_lookup_nvlist(nv, ZPROP_VALUE, &value) == 0);
2428
2429         return (value);
2430 }
2431
2432 /*
2433  * Accepts a property and value and checks that the value
2434  * matches the one found by the channel program. If they are
2435  * not equal, print both of them.
2436  */
2437 void
2438 zcp_check(zfs_handle_t *zhp, zfs_prop_t prop, uint64_t intval,
2439     const char *strval)
2440 {
2441         if (!zhp->zfs_hdl->libzfs_prop_debug)
2442                 return;
2443         int error;
2444         char *poolname = zhp->zpool_hdl->zpool_name;
2445         const char *program =
2446             "args = ...\n"
2447             "ds = args['dataset']\n"
2448             "prop = args['property']\n"
2449             "value, setpoint = zfs.get_prop(ds, prop)\n"
2450             "return {value=value, setpoint=setpoint}\n";
2451         nvlist_t *outnvl;
2452         nvlist_t *retnvl;
2453         nvlist_t *argnvl = fnvlist_alloc();
2454
2455         fnvlist_add_string(argnvl, "dataset", zhp->zfs_name);
2456         fnvlist_add_string(argnvl, "property", zfs_prop_to_name(prop));
2457
2458         error = lzc_channel_program_nosync(poolname, program,
2459             10 * 1000 * 1000, 10 * 1024 * 1024, argnvl, &outnvl);
2460
2461         if (error == 0) {
2462                 retnvl = fnvlist_lookup_nvlist(outnvl, "return");
2463                 if (zfs_prop_get_type(prop) == PROP_TYPE_NUMBER) {
2464                         int64_t ans;
2465                         error = nvlist_lookup_int64(retnvl, "value", &ans);
2466                         if (error != 0) {
2467                                 (void) fprintf(stderr, "zcp check error: %u\n",
2468                                     error);
2469                                 return;
2470                         }
2471                         if (ans != intval) {
2472                                 (void) fprintf(stderr,
2473                                     "%s: zfs found %lld, but zcp found %lld\n",
2474                                     zfs_prop_to_name(prop),
2475                                     (longlong_t)intval, (longlong_t)ans);
2476                         }
2477                 } else {
2478                         char *str_ans;
2479                         error = nvlist_lookup_string(retnvl, "value", &str_ans);
2480                         if (error != 0) {
2481                                 (void) fprintf(stderr, "zcp check error: %u\n",
2482                                     error);
2483                                 return;
2484                         }
2485                         if (strcmp(strval, str_ans) != 0) {
2486                                 (void) fprintf(stderr,
2487                                     "%s: zfs found %s, but zcp found %s\n",
2488                                     zfs_prop_to_name(prop),
2489                                     strval, str_ans);
2490                         }
2491                 }
2492         } else {
2493                 (void) fprintf(stderr,
2494                     "zcp check failed, channel program error: %u\n", error);
2495         }
2496         nvlist_free(argnvl);
2497         nvlist_free(outnvl);
2498 }
2499
2500 /*
2501  * Retrieve a property from the given object.  If 'literal' is specified, then
2502  * numbers are left as exact values.  Otherwise, numbers are converted to a
2503  * human-readable form.
2504  *
2505  * Returns 0 on success, or -1 on error.
2506  */
2507 int
2508 zfs_prop_get(zfs_handle_t *zhp, zfs_prop_t prop, char *propbuf, size_t proplen,
2509     zprop_source_t *src, char *statbuf, size_t statlen, boolean_t literal)
2510 {
2511         char *source = NULL;
2512         uint64_t val;
2513         const char *str;
2514         const char *strval;
2515         boolean_t received = zfs_is_recvd_props_mode(zhp);
2516
2517         /*
2518          * Check to see if this property applies to our object
2519          */
2520         if (!zfs_prop_valid_for_type(prop, zhp->zfs_type))
2521                 return (-1);
2522
2523         if (received && zfs_prop_readonly(prop))
2524                 return (-1);
2525
2526         if (src)
2527                 *src = ZPROP_SRC_NONE;
2528
2529         switch (prop) {
2530         case ZFS_PROP_CREATION:
2531                 /*
2532                  * 'creation' is a time_t stored in the statistics.  We convert
2533                  * this into a string unless 'literal' is specified.
2534                  */
2535                 {
2536                         val = getprop_uint64(zhp, prop, &source);
2537                         time_t time = (time_t)val;
2538                         struct tm t;
2539
2540                         if (literal ||
2541                             localtime_r(&time, &t) == NULL ||
2542                             strftime(propbuf, proplen, "%a %b %e %k:%M %Y",
2543                             &t) == 0)
2544                                 (void) snprintf(propbuf, proplen, "%llu", val);
2545                 }
2546                 zcp_check(zhp, prop, val, NULL);
2547                 break;
2548
2549         case ZFS_PROP_MOUNTPOINT:
2550                 /*
2551                  * Getting the precise mountpoint can be tricky.
2552                  *
2553                  *  - for 'none' or 'legacy', return those values.
2554                  *  - for inherited mountpoints, we want to take everything
2555                  *    after our ancestor and append it to the inherited value.
2556                  *
2557                  * If the pool has an alternate root, we want to prepend that
2558                  * root to any values we return.
2559                  */
2560
2561                 str = getprop_string(zhp, prop, &source);
2562
2563                 if (str[0] == '/') {
2564                         char buf[MAXPATHLEN];
2565                         char *root = buf;
2566                         const char *relpath;
2567
2568                         /*
2569                          * If we inherit the mountpoint, even from a dataset
2570                          * with a received value, the source will be the path of
2571                          * the dataset we inherit from. If source is
2572                          * ZPROP_SOURCE_VAL_RECVD, the received value is not
2573                          * inherited.
2574                          */
2575                         if (strcmp(source, ZPROP_SOURCE_VAL_RECVD) == 0) {
2576                                 relpath = "";
2577                         } else {
2578                                 relpath = zhp->zfs_name + strlen(source);
2579                                 if (relpath[0] == '/')
2580                                         relpath++;
2581                         }
2582
2583                         if ((zpool_get_prop(zhp->zpool_hdl,
2584                             ZPOOL_PROP_ALTROOT, buf, MAXPATHLEN, NULL,
2585                             B_FALSE)) || (strcmp(root, "-") == 0))
2586                                 root[0] = '\0';
2587                         /*
2588                          * Special case an alternate root of '/'. This will
2589                          * avoid having multiple leading slashes in the
2590                          * mountpoint path.
2591                          */
2592                         if (strcmp(root, "/") == 0)
2593                                 root++;
2594
2595                         /*
2596                          * If the mountpoint is '/' then skip over this
2597                          * if we are obtaining either an alternate root or
2598                          * an inherited mountpoint.
2599                          */
2600                         if (str[1] == '\0' && (root[0] != '\0' ||
2601                             relpath[0] != '\0'))
2602                                 str++;
2603
2604                         if (relpath[0] == '\0')
2605                                 (void) snprintf(propbuf, proplen, "%s%s",
2606                                     root, str);
2607                         else
2608                                 (void) snprintf(propbuf, proplen, "%s%s%s%s",
2609                                     root, str, relpath[0] == '@' ? "" : "/",
2610                                     relpath);
2611                 } else {
2612                         /* 'legacy' or 'none' */
2613                         (void) strlcpy(propbuf, str, proplen);
2614                 }
2615                 zcp_check(zhp, prop, NULL, propbuf);
2616                 break;
2617
2618         case ZFS_PROP_ORIGIN:
2619                 str = getprop_string(zhp, prop, &source);
2620                 if (str == NULL)
2621                         return (-1);
2622                 (void) strlcpy(propbuf, str, proplen);
2623                 zcp_check(zhp, prop, NULL, str);
2624                 break;
2625
2626         case ZFS_PROP_CLONES:
2627                 if (get_clones_string(zhp, propbuf, proplen) != 0)
2628                         return (-1);
2629                 break;
2630
2631         case ZFS_PROP_QUOTA:
2632         case ZFS_PROP_REFQUOTA:
2633         case ZFS_PROP_RESERVATION:
2634         case ZFS_PROP_REFRESERVATION:
2635
2636                 if (get_numeric_property(zhp, prop, src, &source, &val) != 0)
2637                         return (-1);
2638                 /*
2639                  * If quota or reservation is 0, we translate this into 'none'
2640                  * (unless literal is set), and indicate that it's the default
2641                  * value.  Otherwise, we print the number nicely and indicate
2642                  * that its set locally.
2643                  */
2644                 if (val == 0) {
2645                         if (literal)
2646                                 (void) strlcpy(propbuf, "0", proplen);
2647                         else
2648                                 (void) strlcpy(propbuf, "none", proplen);
2649                 } else {
2650                         if (literal)
2651                                 (void) snprintf(propbuf, proplen, "%llu",
2652                                     (u_longlong_t)val);
2653                         else
2654                                 zfs_nicenum(val, propbuf, proplen);
2655                 }
2656                 zcp_check(zhp, prop, val, NULL);
2657                 break;
2658
2659         case ZFS_PROP_FILESYSTEM_LIMIT:
2660         case ZFS_PROP_SNAPSHOT_LIMIT:
2661         case ZFS_PROP_FILESYSTEM_COUNT:
2662         case ZFS_PROP_SNAPSHOT_COUNT:
2663
2664                 if (get_numeric_property(zhp, prop, src, &source, &val) != 0)
2665                         return (-1);
2666
2667                 /*
2668                  * If limit is UINT64_MAX, we translate this into 'none' (unless
2669                  * literal is set), and indicate that it's the default value.
2670                  * Otherwise, we print the number nicely and indicate that it's
2671                  * set locally.
2672                  */
2673                 if (literal) {
2674                         (void) snprintf(propbuf, proplen, "%llu",
2675                             (u_longlong_t)val);
2676                 } else if (val == UINT64_MAX) {
2677                         (void) strlcpy(propbuf, "none", proplen);
2678                 } else {
2679                         zfs_nicenum(val, propbuf, proplen);
2680                 }
2681
2682                 zcp_check(zhp, prop, val, NULL);
2683                 break;
2684
2685         case ZFS_PROP_REFRATIO:
2686         case ZFS_PROP_COMPRESSRATIO:
2687                 if (get_numeric_property(zhp, prop, src, &source, &val) != 0)
2688                         return (-1);
2689                 (void) snprintf(propbuf, proplen, "%llu.%02llux",
2690                     (u_longlong_t)(val / 100),
2691                     (u_longlong_t)(val % 100));
2692                 zcp_check(zhp, prop, val, NULL);
2693                 break;
2694
2695         case ZFS_PROP_TYPE:
2696                 switch (zhp->zfs_type) {
2697                 case ZFS_TYPE_FILESYSTEM:
2698                         str = "filesystem";
2699                         break;
2700                 case ZFS_TYPE_VOLUME:
2701                         str = "volume";
2702                         break;
2703                 case ZFS_TYPE_SNAPSHOT:
2704                         str = "snapshot";
2705                         break;
2706                 case ZFS_TYPE_BOOKMARK:
2707                         str = "bookmark";
2708                         break;
2709                 default:
2710                         abort();
2711                 }
2712                 (void) snprintf(propbuf, proplen, "%s", str);
2713                 zcp_check(zhp, prop, NULL, propbuf);
2714                 break;
2715
2716         case ZFS_PROP_MOUNTED:
2717                 /*
2718                  * The 'mounted' property is a pseudo-property that described
2719                  * whether the filesystem is currently mounted.  Even though
2720                  * it's a boolean value, the typical values of "on" and "off"
2721                  * don't make sense, so we translate to "yes" and "no".
2722                  */
2723                 if (get_numeric_property(zhp, ZFS_PROP_MOUNTED,
2724                     src, &source, &val) != 0)
2725                         return (-1);
2726                 if (val)
2727                         (void) strlcpy(propbuf, "yes", proplen);
2728                 else
2729                         (void) strlcpy(propbuf, "no", proplen);
2730                 break;
2731
2732         case ZFS_PROP_NAME:
2733                 /*
2734                  * The 'name' property is a pseudo-property derived from the
2735                  * dataset name.  It is presented as a real property to simplify
2736                  * consumers.
2737                  */
2738                 (void) strlcpy(propbuf, zhp->zfs_name, proplen);
2739                 zcp_check(zhp, prop, NULL, propbuf);
2740                 break;
2741
2742         case ZFS_PROP_MLSLABEL:
2743                 {
2744 #ifdef illumos
2745                         m_label_t *new_sl = NULL;
2746                         char *ascii = NULL;     /* human readable label */
2747
2748                         (void) strlcpy(propbuf,
2749                             getprop_string(zhp, prop, &source), proplen);
2750
2751                         if (literal || (strcasecmp(propbuf,
2752                             ZFS_MLSLABEL_DEFAULT) == 0))
2753                                 break;
2754
2755                         /*
2756                          * Try to translate the internal hex string to
2757                          * human-readable output.  If there are any
2758                          * problems just use the hex string.
2759                          */
2760
2761                         if (str_to_label(propbuf, &new_sl, MAC_LABEL,
2762                             L_NO_CORRECTION, NULL) == -1) {
2763                                 m_label_free(new_sl);
2764                                 break;
2765                         }
2766
2767                         if (label_to_str(new_sl, &ascii, M_LABEL,
2768                             DEF_NAMES) != 0) {
2769                                 if (ascii)
2770                                         free(ascii);
2771                                 m_label_free(new_sl);
2772                                 break;
2773                         }
2774                         m_label_free(new_sl);
2775
2776                         (void) strlcpy(propbuf, ascii, proplen);
2777                         free(ascii);
2778 #else   /* !illumos */
2779                         propbuf[0] = '\0';
2780 #endif  /* illumos */
2781                 }
2782                 break;
2783
2784         case ZFS_PROP_GUID:
2785         case ZFS_PROP_CREATETXG:
2786                 /*
2787                  * GUIDs are stored as numbers, but they are identifiers.
2788                  * We don't want them to be pretty printed, because pretty
2789                  * printing mangles the ID into a truncated and useless value.
2790                  */
2791                 if (get_numeric_property(zhp, prop, src, &source, &val) != 0)
2792                         return (-1);
2793                 (void) snprintf(propbuf, proplen, "%llu", (u_longlong_t)val);
2794                 zcp_check(zhp, prop, val, NULL);
2795                 break;
2796
2797         default:
2798                 switch (zfs_prop_get_type(prop)) {
2799                 case PROP_TYPE_NUMBER:
2800                         if (get_numeric_property(zhp, prop, src,
2801                             &source, &val) != 0) {
2802                                 return (-1);
2803                         }
2804
2805                         if (literal) {
2806                                 (void) snprintf(propbuf, proplen, "%llu",
2807                                     (u_longlong_t)val);
2808                         } else {
2809                                 zfs_nicenum(val, propbuf, proplen);
2810                         }
2811                         zcp_check(zhp, prop, val, NULL);
2812                         break;
2813
2814                 case PROP_TYPE_STRING:
2815                         str = getprop_string(zhp, prop, &source);
2816                         if (str == NULL)
2817                                 return (-1);
2818
2819                         (void) strlcpy(propbuf, str, proplen);
2820                         zcp_check(zhp, prop, NULL, str);
2821                         break;
2822
2823                 case PROP_TYPE_INDEX:
2824                         if (get_numeric_property(zhp, prop, src,
2825                             &source, &val) != 0)
2826                                 return (-1);
2827                         if (zfs_prop_index_to_string(prop, val, &strval) != 0)
2828                                 return (-1);
2829
2830                         (void) strlcpy(propbuf, strval, proplen);
2831                         zcp_check(zhp, prop, NULL, strval);
2832                         break;
2833
2834                 default:
2835                         abort();
2836                 }
2837         }
2838
2839         get_source(zhp, src, source, statbuf, statlen);
2840
2841         return (0);
2842 }
2843
2844 /*
2845  * Utility function to get the given numeric property.  Does no validation that
2846  * the given property is the appropriate type; should only be used with
2847  * hard-coded property types.
2848  */
2849 uint64_t
2850 zfs_prop_get_int(zfs_handle_t *zhp, zfs_prop_t prop)
2851 {
2852         char *source;
2853         uint64_t val;
2854
2855         (void) get_numeric_property(zhp, prop, NULL, &source, &val);
2856
2857         return (val);
2858 }
2859
2860 int
2861 zfs_prop_set_int(zfs_handle_t *zhp, zfs_prop_t prop, uint64_t val)
2862 {
2863         char buf[64];
2864
2865         (void) snprintf(buf, sizeof (buf), "%llu", (longlong_t)val);
2866         return (zfs_prop_set(zhp, zfs_prop_to_name(prop), buf));
2867 }
2868
2869 /*
2870  * Similar to zfs_prop_get(), but returns the value as an integer.
2871  */
2872 int
2873 zfs_prop_get_numeric(zfs_handle_t *zhp, zfs_prop_t prop, uint64_t *value,
2874     zprop_source_t *src, char *statbuf, size_t statlen)
2875 {
2876         char *source;
2877
2878         /*
2879          * Check to see if this property applies to our object
2880          */
2881         if (!zfs_prop_valid_for_type(prop, zhp->zfs_type)) {
2882                 return (zfs_error_fmt(zhp->zfs_hdl, EZFS_PROPTYPE,
2883                     dgettext(TEXT_DOMAIN, "cannot get property '%s'"),
2884                     zfs_prop_to_name(prop)));
2885         }
2886
2887         if (src)
2888                 *src = ZPROP_SRC_NONE;
2889
2890         if (get_numeric_property(zhp, prop, src, &source, value) != 0)
2891                 return (-1);
2892
2893         get_source(zhp, src, source, statbuf, statlen);
2894
2895         return (0);
2896 }
2897
2898 static int
2899 idmap_id_to_numeric_domain_rid(uid_t id, boolean_t isuser,
2900     char **domainp, idmap_rid_t *ridp)
2901 {
2902 #ifdef illumos
2903         idmap_get_handle_t *get_hdl = NULL;
2904         idmap_stat status;
2905         int err = EINVAL;
2906
2907         if (idmap_get_create(&get_hdl) != IDMAP_SUCCESS)
2908                 goto out;
2909
2910         if (isuser) {
2911                 err = idmap_get_sidbyuid(get_hdl, id,
2912                     IDMAP_REQ_FLG_USE_CACHE, domainp, ridp, &status);
2913         } else {
2914                 err = idmap_get_sidbygid(get_hdl, id,
2915                     IDMAP_REQ_FLG_USE_CACHE, domainp, ridp, &status);
2916         }
2917         if (err == IDMAP_SUCCESS &&
2918             idmap_get_mappings(get_hdl) == IDMAP_SUCCESS &&
2919             status == IDMAP_SUCCESS)
2920                 err = 0;
2921         else
2922                 err = EINVAL;
2923 out:
2924         if (get_hdl)
2925                 idmap_get_destroy(get_hdl);
2926         return (err);
2927 #else   /* !illumos */
2928         assert(!"invalid code path");
2929         return (EINVAL); // silence compiler warning
2930 #endif  /* illumos */
2931 }
2932
2933 /*
2934  * convert the propname into parameters needed by kernel
2935  * Eg: userquota@ahrens -> ZFS_PROP_USERQUOTA, "", 126829
2936  * Eg: userused@matt@domain -> ZFS_PROP_USERUSED, "S-1-123-456", 789
2937  */
2938 static int
2939 userquota_propname_decode(const char *propname, boolean_t zoned,
2940     zfs_userquota_prop_t *typep, char *domain, int domainlen, uint64_t *ridp)
2941 {
2942         zfs_userquota_prop_t type;
2943         char *cp, *end;
2944         char *numericsid = NULL;
2945         boolean_t isuser;
2946
2947         domain[0] = '\0';
2948         *ridp = 0;
2949         /* Figure out the property type ({user|group}{quota|space}) */
2950         for (type = 0; type < ZFS_NUM_USERQUOTA_PROPS; type++) {
2951                 if (strncmp(propname, zfs_userquota_prop_prefixes[type],
2952                     strlen(zfs_userquota_prop_prefixes[type])) == 0)
2953                         break;
2954         }
2955         if (type == ZFS_NUM_USERQUOTA_PROPS)
2956                 return (EINVAL);
2957         *typep = type;
2958
2959         isuser = (type == ZFS_PROP_USERQUOTA ||
2960             type == ZFS_PROP_USERUSED);
2961
2962         cp = strchr(propname, '@') + 1;
2963
2964         if (strchr(cp, '@')) {
2965 #ifdef illumos
2966                 /*
2967                  * It's a SID name (eg "user@domain") that needs to be
2968                  * turned into S-1-domainID-RID.
2969                  */
2970                 int flag = 0;
2971                 idmap_stat stat, map_stat;
2972                 uid_t pid;
2973                 idmap_rid_t rid;
2974                 idmap_get_handle_t *gh = NULL;
2975
2976                 stat = idmap_get_create(&gh);
2977                 if (stat != IDMAP_SUCCESS) {
2978                         idmap_get_destroy(gh);
2979                         return (ENOMEM);
2980                 }
2981                 if (zoned && getzoneid() == GLOBAL_ZONEID)
2982                         return (ENOENT);
2983                 if (isuser) {
2984                         stat = idmap_getuidbywinname(cp, NULL, flag, &pid);
2985                         if (stat < 0)
2986                                 return (ENOENT);
2987                         stat = idmap_get_sidbyuid(gh, pid, flag, &numericsid,
2988                             &rid, &map_stat);
2989                 } else {
2990                         stat = idmap_getgidbywinname(cp, NULL, flag, &pid);
2991                         if (stat < 0)
2992                                 return (ENOENT);
2993                         stat = idmap_get_sidbygid(gh, pid, flag, &numericsid,
2994                             &rid, &map_stat);
2995                 }
2996                 if (stat < 0) {
2997                         idmap_get_destroy(gh);
2998                         return (ENOENT);
2999                 }
3000                 stat = idmap_get_mappings(gh);
3001                 idmap_get_destroy(gh);
3002
3003                 if (stat < 0) {
3004                         return (ENOENT);
3005                 }
3006                 if (numericsid == NULL)
3007                         return (ENOENT);
3008                 cp = numericsid;
3009                 *ridp = rid;
3010                 /* will be further decoded below */
3011 #else   /* !illumos */
3012                 return (ENOENT);
3013 #endif  /* illumos */
3014         }
3015
3016         if (strncmp(cp, "S-1-", 4) == 0) {
3017                 /* It's a numeric SID (eg "S-1-234-567-89") */
3018                 (void) strlcpy(domain, cp, domainlen);
3019                 errno = 0;
3020                 if (*ridp == 0) {
3021                         cp = strrchr(domain, '-');
3022                         *cp = '\0';
3023                         cp++;
3024                         *ridp = strtoull(cp, &end, 10);
3025                 } else {
3026                         end = "";
3027                 }
3028                 if (numericsid) {
3029                         free(numericsid);
3030                         numericsid = NULL;
3031                 }
3032                 if (errno != 0 || *end != '\0')
3033                         return (EINVAL);
3034         } else if (!isdigit(*cp)) {
3035                 /*
3036                  * It's a user/group name (eg "user") that needs to be
3037                  * turned into a uid/gid
3038                  */
3039                 if (zoned && getzoneid() == GLOBAL_ZONEID)
3040                         return (ENOENT);
3041                 if (isuser) {
3042                         struct passwd *pw;
3043                         pw = getpwnam(cp);
3044                         if (pw == NULL)
3045                                 return (ENOENT);
3046                         *ridp = pw->pw_uid;
3047                 } else {
3048                         struct group *gr;
3049                         gr = getgrnam(cp);
3050                         if (gr == NULL)
3051                                 return (ENOENT);
3052                         *ridp = gr->gr_gid;
3053                 }
3054         } else {
3055                 /* It's a user/group ID (eg "12345"). */
3056                 uid_t id = strtoul(cp, &end, 10);
3057                 idmap_rid_t rid;
3058                 char *mapdomain;
3059
3060                 if (*end != '\0')
3061                         return (EINVAL);
3062                 if (id > MAXUID) {
3063                         /* It's an ephemeral ID. */
3064                         if (idmap_id_to_numeric_domain_rid(id, isuser,
3065                             &mapdomain, &rid) != 0)
3066                                 return (ENOENT);
3067                         (void) strlcpy(domain, mapdomain, domainlen);
3068                         *ridp = rid;
3069                 } else {
3070                         *ridp = id;
3071                 }
3072         }
3073
3074         ASSERT3P(numericsid, ==, NULL);
3075         return (0);
3076 }
3077
3078 static int
3079 zfs_prop_get_userquota_common(zfs_handle_t *zhp, const char *propname,
3080     uint64_t *propvalue, zfs_userquota_prop_t *typep)
3081 {
3082         int err;
3083         zfs_cmd_t zc = { 0 };
3084
3085         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
3086
3087         err = userquota_propname_decode(propname,
3088             zfs_prop_get_int(zhp, ZFS_PROP_ZONED),
3089             typep, zc.zc_value, sizeof (zc.zc_value), &zc.zc_guid);
3090         zc.zc_objset_type = *typep;
3091         if (err)
3092                 return (err);
3093
3094         err = ioctl(zhp->zfs_hdl->libzfs_fd, ZFS_IOC_USERSPACE_ONE, &zc);
3095         if (err)
3096                 return (err);
3097
3098         *propvalue = zc.zc_cookie;
3099         return (0);
3100 }
3101
3102 int
3103 zfs_prop_get_userquota_int(zfs_handle_t *zhp, const char *propname,
3104     uint64_t *propvalue)
3105 {
3106         zfs_userquota_prop_t type;
3107
3108         return (zfs_prop_get_userquota_common(zhp, propname, propvalue,
3109             &type));
3110 }
3111
3112 int
3113 zfs_prop_get_userquota(zfs_handle_t *zhp, const char *propname,
3114     char *propbuf, int proplen, boolean_t literal)
3115 {
3116         int err;
3117         uint64_t propvalue;
3118         zfs_userquota_prop_t type;
3119
3120         err = zfs_prop_get_userquota_common(zhp, propname, &propvalue,
3121             &type);
3122
3123         if (err)
3124                 return (err);
3125
3126         if (literal) {
3127                 (void) snprintf(propbuf, proplen, "%llu", propvalue);
3128         } else if (propvalue == 0 &&
3129             (type == ZFS_PROP_USERQUOTA || type == ZFS_PROP_GROUPQUOTA)) {
3130                 (void) strlcpy(propbuf, "none", proplen);
3131         } else {
3132                 zfs_nicenum(propvalue, propbuf, proplen);
3133         }
3134         return (0);
3135 }
3136
3137 int
3138 zfs_prop_get_written_int(zfs_handle_t *zhp, const char *propname,
3139     uint64_t *propvalue)
3140 {
3141         int err;
3142         zfs_cmd_t zc = { 0 };
3143         const char *snapname;
3144
3145         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
3146
3147         snapname = strchr(propname, '@') + 1;
3148         if (strchr(snapname, '@')) {
3149                 (void) strlcpy(zc.zc_value, snapname, sizeof (zc.zc_value));
3150         } else {
3151                 /* snapname is the short name, append it to zhp's fsname */
3152                 char *cp;
3153
3154                 (void) strlcpy(zc.zc_value, zhp->zfs_name,
3155                     sizeof (zc.zc_value));
3156                 cp = strchr(zc.zc_value, '@');
3157                 if (cp != NULL)
3158                         *cp = '\0';
3159                 (void) strlcat(zc.zc_value, "@", sizeof (zc.zc_value));
3160                 (void) strlcat(zc.zc_value, snapname, sizeof (zc.zc_value));
3161         }
3162
3163         err = ioctl(zhp->zfs_hdl->libzfs_fd, ZFS_IOC_SPACE_WRITTEN, &zc);
3164         if (err)
3165                 return (err);
3166
3167         *propvalue = zc.zc_cookie;
3168         return (0);
3169 }
3170
3171 int
3172 zfs_prop_get_written(zfs_handle_t *zhp, const char *propname,
3173     char *propbuf, int proplen, boolean_t literal)
3174 {
3175         int err;
3176         uint64_t propvalue;
3177
3178         err = zfs_prop_get_written_int(zhp, propname, &propvalue);
3179
3180         if (err)
3181                 return (err);
3182
3183         if (literal) {
3184                 (void) snprintf(propbuf, proplen, "%llu", propvalue);
3185         } else {
3186                 zfs_nicenum(propvalue, propbuf, proplen);
3187         }
3188         return (0);
3189 }
3190
3191 /*
3192  * Returns the name of the given zfs handle.
3193  */
3194 const char *
3195 zfs_get_name(const zfs_handle_t *zhp)
3196 {
3197         return (zhp->zfs_name);
3198 }
3199
3200 /*
3201  * Returns the name of the parent pool for the given zfs handle.
3202  */
3203 const char *
3204 zfs_get_pool_name(const zfs_handle_t *zhp)
3205 {
3206         return (zhp->zpool_hdl->zpool_name);
3207 }
3208
3209 /*
3210  * Returns the type of the given zfs handle.
3211  */
3212 zfs_type_t
3213 zfs_get_type(const zfs_handle_t *zhp)
3214 {
3215         return (zhp->zfs_type);
3216 }
3217
3218 /*
3219  * Is one dataset name a child dataset of another?
3220  *
3221  * Needs to handle these cases:
3222  * Dataset 1    "a/foo"         "a/foo"         "a/foo"         "a/foo"
3223  * Dataset 2    "a/fo"          "a/foobar"      "a/bar/baz"     "a/foo/bar"
3224  * Descendant?  No.             No.             No.             Yes.
3225  */
3226 static boolean_t
3227 is_descendant(const char *ds1, const char *ds2)
3228 {
3229         size_t d1len = strlen(ds1);
3230
3231         /* ds2 can't be a descendant if it's smaller */
3232         if (strlen(ds2) < d1len)
3233                 return (B_FALSE);
3234
3235         /* otherwise, compare strings and verify that there's a '/' char */
3236         return (ds2[d1len] == '/' && (strncmp(ds1, ds2, d1len) == 0));
3237 }
3238
3239 /*
3240  * Given a complete name, return just the portion that refers to the parent.
3241  * Will return -1 if there is no parent (path is just the name of the
3242  * pool).
3243  */
3244 static int
3245 parent_name(const char *path, char *buf, size_t buflen)
3246 {
3247         char *slashp;
3248
3249         (void) strlcpy(buf, path, buflen);
3250
3251         if ((slashp = strrchr(buf, '/')) == NULL)
3252                 return (-1);
3253         *slashp = '\0';
3254
3255         return (0);
3256 }
3257
3258 /*
3259  * If accept_ancestor is false, then check to make sure that the given path has
3260  * a parent, and that it exists.  If accept_ancestor is true, then find the
3261  * closest existing ancestor for the given path.  In prefixlen return the
3262  * length of already existing prefix of the given path.  We also fetch the
3263  * 'zoned' property, which is used to validate property settings when creating
3264  * new datasets.
3265  */
3266 static int
3267 check_parents(libzfs_handle_t *hdl, const char *path, uint64_t *zoned,
3268     boolean_t accept_ancestor, int *prefixlen)
3269 {
3270         zfs_cmd_t zc = { 0 };
3271         char parent[ZFS_MAX_DATASET_NAME_LEN];
3272         char *slash;
3273         zfs_handle_t *zhp;
3274         char errbuf[1024];
3275         uint64_t is_zoned;
3276
3277         (void) snprintf(errbuf, sizeof (errbuf),
3278             dgettext(TEXT_DOMAIN, "cannot create '%s'"), path);
3279
3280         /* get parent, and check to see if this is just a pool */
3281         if (parent_name(path, parent, sizeof (parent)) != 0) {
3282                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3283                     "missing dataset name"));
3284                 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3285         }
3286
3287         /* check to see if the pool exists */
3288         if ((slash = strchr(parent, '/')) == NULL)
3289                 slash = parent + strlen(parent);
3290         (void) strncpy(zc.zc_name, parent, slash - parent);
3291         zc.zc_name[slash - parent] = '\0';
3292         if (ioctl(hdl->libzfs_fd, ZFS_IOC_OBJSET_STATS, &zc) != 0 &&
3293             errno == ENOENT) {
3294                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3295                     "no such pool '%s'"), zc.zc_name);
3296                 return (zfs_error(hdl, EZFS_NOENT, errbuf));
3297         }
3298
3299         /* check to see if the parent dataset exists */
3300         while ((zhp = make_dataset_handle(hdl, parent)) == NULL) {
3301                 if (errno == ENOENT && accept_ancestor) {
3302                         /*
3303                          * Go deeper to find an ancestor, give up on top level.
3304                          */
3305                         if (parent_name(parent, parent, sizeof (parent)) != 0) {
3306                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3307                                     "no such pool '%s'"), zc.zc_name);
3308                                 return (zfs_error(hdl, EZFS_NOENT, errbuf));
3309                         }
3310                 } else if (errno == ENOENT) {
3311                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3312                             "parent does not exist"));
3313                         return (zfs_error(hdl, EZFS_NOENT, errbuf));
3314                 } else
3315                         return (zfs_standard_error(hdl, errno, errbuf));
3316         }
3317
3318         is_zoned = zfs_prop_get_int(zhp, ZFS_PROP_ZONED);
3319         if (zoned != NULL)
3320                 *zoned = is_zoned;
3321
3322         /* we are in a non-global zone, but parent is in the global zone */
3323         if (getzoneid() != GLOBAL_ZONEID && !is_zoned) {
3324                 (void) zfs_standard_error(hdl, EPERM, errbuf);
3325                 zfs_close(zhp);
3326                 return (-1);
3327         }
3328
3329         /* make sure parent is a filesystem */
3330         if (zfs_get_type(zhp) != ZFS_TYPE_FILESYSTEM) {
3331                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3332                     "parent is not a filesystem"));
3333                 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf);
3334                 zfs_close(zhp);
3335                 return (-1);
3336         }
3337
3338         zfs_close(zhp);
3339         if (prefixlen != NULL)
3340                 *prefixlen = strlen(parent);
3341         return (0);
3342 }
3343
3344 /*
3345  * Finds whether the dataset of the given type(s) exists.
3346  */
3347 boolean_t
3348 zfs_dataset_exists(libzfs_handle_t *hdl, const char *path, zfs_type_t types)
3349 {
3350         zfs_handle_t *zhp;
3351
3352         if (!zfs_validate_name(hdl, path, types, B_FALSE))
3353                 return (B_FALSE);
3354
3355         /*
3356          * Try to get stats for the dataset, which will tell us if it exists.
3357          */
3358         if ((zhp = make_dataset_handle(hdl, path)) != NULL) {
3359                 int ds_type = zhp->zfs_type;
3360
3361                 zfs_close(zhp);
3362                 if (types & ds_type)
3363                         return (B_TRUE);
3364         }
3365         return (B_FALSE);
3366 }
3367
3368 /*
3369  * Given a path to 'target', create all the ancestors between
3370  * the prefixlen portion of the path, and the target itself.
3371  * Fail if the initial prefixlen-ancestor does not already exist.
3372  */
3373 int
3374 create_parents(libzfs_handle_t *hdl, char *target, int prefixlen)
3375 {
3376         zfs_handle_t *h;
3377         char *cp;
3378         const char *opname;
3379
3380         /* make sure prefix exists */
3381         cp = target + prefixlen;
3382         if (*cp != '/') {
3383                 assert(strchr(cp, '/') == NULL);
3384                 h = zfs_open(hdl, target, ZFS_TYPE_FILESYSTEM);
3385         } else {
3386                 *cp = '\0';
3387                 h = zfs_open(hdl, target, ZFS_TYPE_FILESYSTEM);
3388                 *cp = '/';
3389         }
3390         if (h == NULL)
3391                 return (-1);
3392         zfs_close(h);
3393
3394         /*
3395          * Attempt to create, mount, and share any ancestor filesystems,
3396          * up to the prefixlen-long one.
3397          */
3398         for (cp = target + prefixlen + 1;
3399             (cp = strchr(cp, '/')) != NULL; *cp = '/', cp++) {
3400
3401                 *cp = '\0';
3402
3403                 h = make_dataset_handle(hdl, target);
3404                 if (h) {
3405                         /* it already exists, nothing to do here */
3406                         zfs_close(h);
3407                         continue;
3408                 }
3409
3410                 if (zfs_create(hdl, target, ZFS_TYPE_FILESYSTEM,
3411                     NULL) != 0) {
3412                         opname = dgettext(TEXT_DOMAIN, "create");
3413                         goto ancestorerr;
3414                 }
3415
3416                 h = zfs_open(hdl, target, ZFS_TYPE_FILESYSTEM);
3417                 if (h == NULL) {
3418                         opname = dgettext(TEXT_DOMAIN, "open");
3419                         goto ancestorerr;
3420                 }
3421
3422                 if (zfs_mount(h, NULL, 0) != 0) {
3423                         opname = dgettext(TEXT_DOMAIN, "mount");
3424                         goto ancestorerr;
3425                 }
3426
3427                 if (zfs_share(h) != 0) {
3428                         opname = dgettext(TEXT_DOMAIN, "share");
3429                         goto ancestorerr;
3430                 }
3431
3432                 zfs_close(h);
3433         }
3434
3435         return (0);
3436
3437 ancestorerr:
3438         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3439             "failed to %s ancestor '%s'"), opname, target);
3440         return (-1);
3441 }
3442
3443 /*
3444  * Creates non-existing ancestors of the given path.
3445  */
3446 int
3447 zfs_create_ancestors(libzfs_handle_t *hdl, const char *path)
3448 {
3449         int prefix;
3450         char *path_copy;
3451         char errbuf[1024];
3452         int rc = 0;
3453
3454         (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3455             "cannot create '%s'"), path);
3456
3457         /*
3458          * Check that we are not passing the nesting limit
3459          * before we start creating any ancestors.
3460          */
3461         if (dataset_nestcheck(path) != 0) {
3462                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3463                     "maximum name nesting depth exceeded"));
3464                 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3465         }
3466
3467         if (check_parents(hdl, path, NULL, B_TRUE, &prefix) != 0)
3468                 return (-1);
3469
3470         if ((path_copy = strdup(path)) != NULL) {
3471                 rc = create_parents(hdl, path_copy, prefix);
3472                 free(path_copy);
3473         }
3474         if (path_copy == NULL || rc != 0)
3475                 return (-1);
3476
3477         return (0);
3478 }
3479
3480 /*
3481  * Create a new filesystem or volume.
3482  */
3483 int
3484 zfs_create(libzfs_handle_t *hdl, const char *path, zfs_type_t type,
3485     nvlist_t *props)
3486 {
3487         int ret;
3488         uint64_t size = 0;
3489         uint64_t blocksize = zfs_prop_default_numeric(ZFS_PROP_VOLBLOCKSIZE);
3490         char errbuf[1024];
3491         uint64_t zoned;
3492         enum lzc_dataset_type ost;
3493         zpool_handle_t *zpool_handle;
3494
3495         (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3496             "cannot create '%s'"), path);
3497
3498         /* validate the path, taking care to note the extended error message */
3499         if (!zfs_validate_name(hdl, path, type, B_TRUE))
3500                 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3501
3502         if (dataset_nestcheck(path) != 0) {
3503                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3504                     "maximum name nesting depth exceeded"));
3505                 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3506         }
3507
3508         /* validate parents exist */
3509         if (check_parents(hdl, path, &zoned, B_FALSE, NULL) != 0)
3510                 return (-1);
3511
3512         /*
3513          * The failure modes when creating a dataset of a different type over
3514          * one that already exists is a little strange.  In particular, if you
3515          * try to create a dataset on top of an existing dataset, the ioctl()
3516          * will return ENOENT, not EEXIST.  To prevent this from happening, we
3517          * first try to see if the dataset exists.
3518          */
3519         if (zfs_dataset_exists(hdl, path, ZFS_TYPE_DATASET)) {
3520                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3521                     "dataset already exists"));
3522                 return (zfs_error(hdl, EZFS_EXISTS, errbuf));
3523         }
3524
3525         if (type == ZFS_TYPE_VOLUME)
3526                 ost = LZC_DATSET_TYPE_ZVOL;
3527         else
3528                 ost = LZC_DATSET_TYPE_ZFS;
3529
3530         /* open zpool handle for prop validation */
3531         char pool_path[ZFS_MAX_DATASET_NAME_LEN];
3532         (void) strlcpy(pool_path, path, sizeof (pool_path));
3533
3534         /* truncate pool_path at first slash */
3535         char *p = strchr(pool_path, '/');
3536         if (p != NULL)
3537                 *p = '\0';
3538
3539         if ((zpool_handle = zpool_open(hdl, pool_path)) == NULL)
3540                 return (-1);
3541
3542         if (props && (props = zfs_valid_proplist(hdl, type, props,
3543             zoned, NULL, zpool_handle, errbuf)) == 0) {
3544                 zpool_close(zpool_handle);
3545                 return (-1);
3546         }
3547         zpool_close(zpool_handle);
3548
3549         if (type == ZFS_TYPE_VOLUME) {
3550                 /*
3551                  * If we are creating a volume, the size and block size must
3552                  * satisfy a few restraints.  First, the blocksize must be a
3553                  * valid block size between SPA_{MIN,MAX}BLOCKSIZE.  Second, the
3554                  * volsize must be a multiple of the block size, and cannot be
3555                  * zero.
3556                  */
3557                 if (props == NULL || nvlist_lookup_uint64(props,
3558                     zfs_prop_to_name(ZFS_PROP_VOLSIZE), &size) != 0) {
3559                         nvlist_free(props);
3560                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3561                             "missing volume size"));
3562                         return (zfs_error(hdl, EZFS_BADPROP, errbuf));
3563                 }
3564
3565                 if ((ret = nvlist_lookup_uint64(props,
3566                     zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE),
3567                     &blocksize)) != 0) {
3568                         if (ret == ENOENT) {
3569                                 blocksize = zfs_prop_default_numeric(
3570                                     ZFS_PROP_VOLBLOCKSIZE);
3571                         } else {
3572                                 nvlist_free(props);
3573                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3574                                     "missing volume block size"));
3575                                 return (zfs_error(hdl, EZFS_BADPROP, errbuf));
3576                         }
3577                 }
3578
3579                 if (size == 0) {
3580                         nvlist_free(props);
3581                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3582                             "volume size cannot be zero"));
3583                         return (zfs_error(hdl, EZFS_BADPROP, errbuf));
3584                 }
3585
3586                 if (size % blocksize != 0) {
3587                         nvlist_free(props);
3588                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3589                             "volume size must be a multiple of volume block "
3590                             "size"));
3591                         return (zfs_error(hdl, EZFS_BADPROP, errbuf));
3592                 }
3593         }
3594
3595         /* create the dataset */
3596         ret = lzc_create(path, ost, props);
3597         nvlist_free(props);
3598
3599         /* check for failure */
3600         if (ret != 0) {
3601                 char parent[ZFS_MAX_DATASET_NAME_LEN];
3602                 (void) parent_name(path, parent, sizeof (parent));
3603
3604                 switch (errno) {
3605                 case ENOENT:
3606                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3607                             "no such parent '%s'"), parent);
3608                         return (zfs_error(hdl, EZFS_NOENT, errbuf));
3609
3610                 case EINVAL:
3611                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3612                             "parent '%s' is not a filesystem"), parent);
3613                         return (zfs_error(hdl, EZFS_BADTYPE, errbuf));
3614
3615                 case ENOTSUP:
3616                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3617                             "pool must be upgraded to set this "
3618                             "property or value"));
3619                         return (zfs_error(hdl, EZFS_BADVERSION, errbuf));
3620                 case ERANGE:
3621                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3622                             "invalid property value(s) specified"));
3623                         return (zfs_error(hdl, EZFS_BADPROP, errbuf));
3624 #ifdef _ILP32
3625                 case EOVERFLOW:
3626                         /*
3627                          * This platform can't address a volume this big.
3628                          */
3629                         if (type == ZFS_TYPE_VOLUME)
3630                                 return (zfs_error(hdl, EZFS_VOLTOOBIG,
3631                                     errbuf));
3632 #endif
3633                         /* FALLTHROUGH */
3634                 default:
3635                         return (zfs_standard_error(hdl, errno, errbuf));
3636                 }
3637         }
3638
3639         return (0);
3640 }
3641
3642 /*
3643  * Destroys the given dataset.  The caller must make sure that the filesystem
3644  * isn't mounted, and that there are no active dependents. If the file system
3645  * does not exist this function does nothing.
3646  */
3647 int
3648 zfs_destroy(zfs_handle_t *zhp, boolean_t defer)
3649 {
3650         int error;
3651
3652         if (zhp->zfs_type != ZFS_TYPE_SNAPSHOT && defer)
3653                 return (EINVAL);
3654
3655         if (zhp->zfs_type == ZFS_TYPE_BOOKMARK) {
3656                 nvlist_t *nv = fnvlist_alloc();
3657                 fnvlist_add_boolean(nv, zhp->zfs_name);
3658                 error = lzc_destroy_bookmarks(nv, NULL);
3659                 fnvlist_free(nv);
3660                 if (error != 0) {
3661                         return (zfs_standard_error_fmt(zhp->zfs_hdl, error,
3662                             dgettext(TEXT_DOMAIN, "cannot destroy '%s'"),
3663                             zhp->zfs_name));
3664                 }
3665                 return (0);
3666         }
3667
3668         if (zhp->zfs_type == ZFS_TYPE_SNAPSHOT) {
3669                 nvlist_t *nv = fnvlist_alloc();
3670                 fnvlist_add_boolean(nv, zhp->zfs_name);
3671                 error = lzc_destroy_snaps(nv, defer, NULL);
3672                 fnvlist_free(nv);
3673         } else {
3674                 error = lzc_destroy(zhp->zfs_name);
3675         }
3676
3677         if (error != 0 && error != ENOENT) {
3678                 return (zfs_standard_error_fmt(zhp->zfs_hdl, errno,
3679                     dgettext(TEXT_DOMAIN, "cannot destroy '%s'"),
3680                     zhp->zfs_name));
3681         }
3682
3683         remove_mountpoint(zhp);
3684
3685         return (0);
3686 }
3687
3688 struct destroydata {
3689         nvlist_t *nvl;
3690         const char *snapname;
3691 };
3692
3693 static int
3694 zfs_check_snap_cb(zfs_handle_t *zhp, void *arg)
3695 {
3696         struct destroydata *dd = arg;
3697         char name[ZFS_MAX_DATASET_NAME_LEN];
3698         int rv = 0;
3699
3700         (void) snprintf(name, sizeof (name),
3701             "%s@%s", zhp->zfs_name, dd->snapname);
3702
3703         if (lzc_exists(name))
3704                 verify(nvlist_add_boolean(dd->nvl, name) == 0);
3705
3706         rv = zfs_iter_filesystems(zhp, zfs_check_snap_cb, dd);
3707         zfs_close(zhp);
3708         return (rv);
3709 }
3710
3711 /*
3712  * Destroys all snapshots with the given name in zhp & descendants.
3713  */
3714 int
3715 zfs_destroy_snaps(zfs_handle_t *zhp, char *snapname, boolean_t defer)
3716 {
3717         int ret;
3718         struct destroydata dd = { 0 };
3719
3720         dd.snapname = snapname;
3721         verify(nvlist_alloc(&dd.nvl, NV_UNIQUE_NAME, 0) == 0);
3722         (void) zfs_check_snap_cb(zfs_handle_dup(zhp), &dd);
3723
3724         if (nvlist_empty(dd.nvl)) {
3725                 ret = zfs_standard_error_fmt(zhp->zfs_hdl, ENOENT,
3726                     dgettext(TEXT_DOMAIN, "cannot destroy '%s@%s'"),
3727                     zhp->zfs_name, snapname);
3728         } else {
3729                 ret = zfs_destroy_snaps_nvl(zhp->zfs_hdl, dd.nvl, defer);
3730         }
3731         nvlist_free(dd.nvl);
3732         return (ret);
3733 }
3734
3735 /*
3736  * Destroys all the snapshots named in the nvlist.
3737  */
3738 int
3739 zfs_destroy_snaps_nvl(libzfs_handle_t *hdl, nvlist_t *snaps, boolean_t defer)
3740 {
3741         int ret;
3742         nvlist_t *errlist = NULL;
3743
3744         ret = lzc_destroy_snaps(snaps, defer, &errlist);
3745
3746         if (ret == 0) {
3747                 nvlist_free(errlist);
3748                 return (0);
3749         }
3750
3751         if (nvlist_empty(errlist)) {
3752                 char errbuf[1024];
3753                 (void) snprintf(errbuf, sizeof (errbuf),
3754                     dgettext(TEXT_DOMAIN, "cannot destroy snapshots"));
3755
3756                 ret = zfs_standard_error(hdl, ret, errbuf);
3757         }
3758         for (nvpair_t *pair = nvlist_next_nvpair(errlist, NULL);
3759             pair != NULL; pair = nvlist_next_nvpair(errlist, pair)) {
3760                 char errbuf[1024];
3761                 (void) snprintf(errbuf, sizeof (errbuf),
3762                     dgettext(TEXT_DOMAIN, "cannot destroy snapshot %s"),
3763                     nvpair_name(pair));
3764
3765                 switch (fnvpair_value_int32(pair)) {
3766                 case EEXIST:
3767                         zfs_error_aux(hdl,
3768                             dgettext(TEXT_DOMAIN, "snapshot is cloned"));
3769                         ret = zfs_error(hdl, EZFS_EXISTS, errbuf);
3770                         break;
3771                 default:
3772                         ret = zfs_standard_error(hdl, errno, errbuf);
3773                         break;
3774                 }
3775         }
3776
3777         nvlist_free(errlist);
3778         return (ret);
3779 }
3780
3781 /*
3782  * Clones the given dataset.  The target must be of the same type as the source.
3783  */
3784 int
3785 zfs_clone(zfs_handle_t *zhp, const char *target, nvlist_t *props)
3786 {
3787         char parent[ZFS_MAX_DATASET_NAME_LEN];
3788         int ret;
3789         char errbuf[1024];
3790         libzfs_handle_t *hdl = zhp->zfs_hdl;
3791         uint64_t zoned;
3792
3793         assert(zhp->zfs_type == ZFS_TYPE_SNAPSHOT);
3794
3795         (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3796             "cannot create '%s'"), target);
3797
3798         /* validate the target/clone name */
3799         if (!zfs_validate_name(hdl, target, ZFS_TYPE_FILESYSTEM, B_TRUE))
3800                 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3801
3802         /* validate parents exist */
3803         if (check_parents(hdl, target, &zoned, B_FALSE, NULL) != 0)
3804                 return (-1);
3805
3806         (void) parent_name(target, parent, sizeof (parent));
3807
3808         /* do the clone */
3809
3810         if (props) {
3811                 zfs_type_t type;
3812
3813                 if (ZFS_IS_VOLUME(zhp)) {
3814                         type = ZFS_TYPE_VOLUME;
3815                 } else {
3816                         type = ZFS_TYPE_FILESYSTEM;
3817                 }
3818                 if ((props = zfs_valid_proplist(hdl, type, props, zoned,
3819                     zhp, zhp->zpool_hdl, errbuf)) == NULL)
3820                         return (-1);
3821                 if (zfs_fix_auto_resv(zhp, props) == -1) {
3822                         nvlist_free(props);
3823                         return (-1);
3824                 }
3825         }
3826
3827         ret = lzc_clone(target, zhp->zfs_name, props);
3828         nvlist_free(props);
3829
3830         if (ret != 0) {
3831                 switch (errno) {
3832
3833                 case ENOENT:
3834                         /*
3835                          * The parent doesn't exist.  We should have caught this
3836                          * above, but there may a race condition that has since
3837                          * destroyed the parent.
3838                          *
3839                          * At this point, we don't know whether it's the source
3840                          * that doesn't exist anymore, or whether the target
3841                          * dataset doesn't exist.
3842                          */
3843                         zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN,
3844                             "no such parent '%s'"), parent);
3845                         return (zfs_error(zhp->zfs_hdl, EZFS_NOENT, errbuf));
3846
3847                 case EXDEV:
3848                         zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN,
3849                             "source and target pools differ"));
3850                         return (zfs_error(zhp->zfs_hdl, EZFS_CROSSTARGET,
3851                             errbuf));
3852
3853                 default:
3854                         return (zfs_standard_error(zhp->zfs_hdl, errno,
3855                             errbuf));
3856                 }
3857         }
3858
3859         return (ret);
3860 }
3861
3862 /*
3863  * Promotes the given clone fs to be the clone parent.
3864  */
3865 int
3866 zfs_promote(zfs_handle_t *zhp)
3867 {
3868         libzfs_handle_t *hdl = zhp->zfs_hdl;
3869         char snapname[ZFS_MAX_DATASET_NAME_LEN];
3870         int ret;
3871         char errbuf[1024];
3872
3873         (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3874             "cannot promote '%s'"), zhp->zfs_name);
3875
3876         if (zhp->zfs_type == ZFS_TYPE_SNAPSHOT) {
3877                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3878                     "snapshots can not be promoted"));
3879                 return (zfs_error(hdl, EZFS_BADTYPE, errbuf));
3880         }
3881
3882         if (zhp->zfs_dmustats.dds_origin[0] == '\0') {
3883                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3884                     "not a cloned filesystem"));
3885                 return (zfs_error(hdl, EZFS_BADTYPE, errbuf));
3886         }
3887
3888         if (!zfs_validate_name(hdl, zhp->zfs_name, zhp->zfs_type, B_TRUE))
3889                 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3890
3891         ret = lzc_promote(zhp->zfs_name, snapname, sizeof (snapname));
3892
3893         if (ret != 0) {
3894                 switch (ret) {
3895                 case EEXIST:
3896                         /* There is a conflicting snapshot name. */
3897                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3898                             "conflicting snapshot '%s' from parent '%s'"),
3899                             snapname, zhp->zfs_dmustats.dds_origin);
3900                         return (zfs_error(hdl, EZFS_EXISTS, errbuf));
3901
3902                 default:
3903                         return (zfs_standard_error(hdl, ret, errbuf));
3904                 }
3905         }
3906         return (ret);
3907 }
3908
3909 typedef struct snapdata {
3910         nvlist_t *sd_nvl;
3911         const char *sd_snapname;
3912 } snapdata_t;
3913
3914 static int
3915 zfs_snapshot_cb(zfs_handle_t *zhp, void *arg)
3916 {
3917         snapdata_t *sd = arg;
3918         char name[ZFS_MAX_DATASET_NAME_LEN];
3919         int rv = 0;
3920
3921         if (zfs_prop_get_int(zhp, ZFS_PROP_INCONSISTENT) == 0) {
3922                 (void) snprintf(name, sizeof (name),
3923                     "%s@%s", zfs_get_name(zhp), sd->sd_snapname);
3924
3925                 fnvlist_add_boolean(sd->sd_nvl, name);
3926
3927                 rv = zfs_iter_filesystems(zhp, zfs_snapshot_cb, sd);
3928         }
3929         zfs_close(zhp);
3930
3931         return (rv);
3932 }
3933
3934 int
3935 zfs_remap_indirects(libzfs_handle_t *hdl, const char *fs)
3936 {
3937         int err;
3938         char errbuf[1024];
3939
3940         (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3941             "cannot remap dataset '%s'"), fs);
3942
3943         err = lzc_remap(fs);
3944
3945         if (err != 0) {
3946                 switch (err) {
3947                 case ENOTSUP:
3948                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3949                             "pool must be upgraded"));
3950                         (void) zfs_error(hdl, EZFS_BADVERSION, errbuf);
3951                         break;
3952                 case EINVAL:
3953                         (void) zfs_error(hdl, EZFS_BADTYPE, errbuf);
3954                         break;
3955                 default:
3956                         (void) zfs_standard_error(hdl, err, errbuf);
3957                         break;
3958                 }
3959         }
3960
3961         return (err);
3962 }
3963
3964 /*
3965  * Creates snapshots.  The keys in the snaps nvlist are the snapshots to be
3966  * created.
3967  */
3968 int
3969 zfs_snapshot_nvl(libzfs_handle_t *hdl, nvlist_t *snaps, nvlist_t *props)
3970 {
3971         int ret;
3972         char errbuf[1024];
3973         nvpair_t *elem;
3974         nvlist_t *errors;
3975
3976         (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3977             "cannot create snapshots "));
3978
3979         elem = NULL;
3980         while ((elem = nvlist_next_nvpair(snaps, elem)) != NULL) {
3981                 const char *snapname = nvpair_name(elem);
3982
3983                 /* validate the target name */
3984                 if (!zfs_validate_name(hdl, snapname, ZFS_TYPE_SNAPSHOT,
3985                     B_TRUE)) {
3986                         (void) snprintf(errbuf, sizeof (errbuf),
3987                             dgettext(TEXT_DOMAIN,
3988                             "cannot create snapshot '%s'"), snapname);
3989                         return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3990                 }
3991         }
3992
3993         /*
3994          * get pool handle for prop validation. assumes all snaps are in the
3995          * same pool, as does lzc_snapshot (below).
3996          */
3997         char pool[ZFS_MAX_DATASET_NAME_LEN];
3998         elem = nvlist_next_nvpair(snaps, NULL);
3999         (void) strlcpy(pool, nvpair_name(elem), sizeof (pool));
4000         pool[strcspn(pool, "/@")] = '\0';
4001         zpool_handle_t *zpool_hdl = zpool_open(hdl, pool);
4002
4003         if (props != NULL &&
4004             (props = zfs_valid_proplist(hdl, ZFS_TYPE_SNAPSHOT,
4005             props, B_FALSE, NULL, zpool_hdl, errbuf)) == NULL) {
4006                 zpool_close(zpool_hdl);
4007                 return (-1);
4008         }
4009         zpool_close(zpool_hdl);
4010
4011         ret = lzc_snapshot(snaps, props, &errors);
4012
4013         if (ret != 0) {
4014                 boolean_t printed = B_FALSE;
4015                 for (elem = nvlist_next_nvpair(errors, NULL);
4016                     elem != NULL;
4017                     elem = nvlist_next_nvpair(errors, elem)) {
4018                         (void) snprintf(errbuf, sizeof (errbuf),
4019                             dgettext(TEXT_DOMAIN,
4020                             "cannot create snapshot '%s'"), nvpair_name(elem));
4021                         (void) zfs_standard_error(hdl,
4022                             fnvpair_value_int32(elem), errbuf);
4023                         printed = B_TRUE;
4024                 }
4025                 if (!printed) {
4026                         switch (ret) {
4027                         case EXDEV:
4028                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4029                                     "multiple snapshots of same "
4030                                     "fs not allowed"));
4031                                 (void) zfs_error(hdl, EZFS_EXISTS, errbuf);
4032
4033                                 break;
4034                         default:
4035                                 (void) zfs_standard_error(hdl, ret, errbuf);
4036                         }
4037                 }
4038         }
4039
4040         nvlist_free(props);
4041         nvlist_free(errors);
4042         return (ret);
4043 }
4044
4045 int
4046 zfs_snapshot(libzfs_handle_t *hdl, const char *path, boolean_t recursive,
4047     nvlist_t *props)
4048 {
4049         int ret;
4050         snapdata_t sd = { 0 };
4051         char fsname[ZFS_MAX_DATASET_NAME_LEN];
4052         char *cp;
4053         zfs_handle_t *zhp;
4054         char errbuf[1024];
4055
4056         (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
4057             "cannot snapshot %s"), path);
4058
4059         if (!zfs_validate_name(hdl, path, ZFS_TYPE_SNAPSHOT, B_TRUE))
4060                 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
4061
4062         (void) strlcpy(fsname, path, sizeof (fsname));
4063         cp = strchr(fsname, '@');
4064         *cp = '\0';
4065         sd.sd_snapname = cp + 1;
4066
4067         if ((zhp = zfs_open(hdl, fsname, ZFS_TYPE_FILESYSTEM |
4068             ZFS_TYPE_VOLUME)) == NULL) {
4069                 return (-1);
4070         }
4071
4072         verify(nvlist_alloc(&sd.sd_nvl, NV_UNIQUE_NAME, 0) == 0);
4073         if (recursive) {
4074                 (void) zfs_snapshot_cb(zfs_handle_dup(zhp), &sd);
4075         } else {
4076                 fnvlist_add_boolean(sd.sd_nvl, path);
4077         }
4078
4079         ret = zfs_snapshot_nvl(hdl, sd.sd_nvl, props);
4080         nvlist_free(sd.sd_nvl);
4081         zfs_close(zhp);
4082         return (ret);
4083 }
4084
4085 /*
4086  * Destroy any more recent snapshots.  We invoke this callback on any dependents
4087  * of the snapshot first.  If the 'cb_dependent' member is non-zero, then this
4088  * is a dependent and we should just destroy it without checking the transaction
4089  * group.
4090  */
4091 typedef struct rollback_data {
4092         const char      *cb_target;             /* the snapshot */
4093         uint64_t        cb_create;              /* creation time reference */
4094         boolean_t       cb_error;
4095         boolean_t       cb_force;
4096 } rollback_data_t;
4097
4098 static int
4099 rollback_destroy_dependent(zfs_handle_t *zhp, void *data)
4100 {
4101         rollback_data_t *cbp = data;
4102         prop_changelist_t *clp;
4103
4104         /* We must destroy this clone; first unmount it */
4105         clp = changelist_gather(zhp, ZFS_PROP_NAME, 0,
4106             cbp->cb_force ? MS_FORCE: 0);
4107         if (clp == NULL || changelist_prefix(clp) != 0) {
4108                 cbp->cb_error = B_TRUE;
4109                 zfs_close(zhp);
4110                 return (0);
4111         }
4112         if (zfs_destroy(zhp, B_FALSE) != 0)
4113                 cbp->cb_error = B_TRUE;
4114         else
4115                 changelist_remove(clp, zhp->zfs_name);
4116         (void) changelist_postfix(clp);
4117         changelist_free(clp);
4118
4119         zfs_close(zhp);
4120         return (0);
4121 }
4122
4123 static int
4124 rollback_destroy(zfs_handle_t *zhp, void *data)
4125 {
4126         rollback_data_t *cbp = data;
4127
4128         if (zfs_prop_get_int(zhp, ZFS_PROP_CREATETXG) > cbp->cb_create) {
4129                 cbp->cb_error |= zfs_iter_dependents(zhp, B_FALSE,
4130                     rollback_destroy_dependent, cbp);
4131
4132                 cbp->cb_error |= zfs_destroy(zhp, B_FALSE);
4133         }
4134
4135         zfs_close(zhp);
4136         return (0);
4137 }
4138
4139 /*
4140  * Given a dataset, rollback to a specific snapshot, discarding any
4141  * data changes since then and making it the active dataset.
4142  *
4143  * Any snapshots and bookmarks more recent than the target are
4144  * destroyed, along with their dependents (i.e. clones).
4145  */
4146 int
4147 zfs_rollback(zfs_handle_t *zhp, zfs_handle_t *snap, boolean_t force)
4148 {
4149         rollback_data_t cb = { 0 };
4150         int err;
4151         boolean_t restore_resv = 0;
4152         uint64_t old_volsize = 0, new_volsize;
4153         zfs_prop_t resv_prop;
4154
4155         assert(zhp->zfs_type == ZFS_TYPE_FILESYSTEM ||
4156             zhp->zfs_type == ZFS_TYPE_VOLUME);
4157
4158         /*
4159          * Destroy all recent snapshots and their dependents.
4160          */
4161         cb.cb_force = force;
4162         cb.cb_target = snap->zfs_name;
4163         cb.cb_create = zfs_prop_get_int(snap, ZFS_PROP_CREATETXG);
4164         (void) zfs_iter_snapshots(zhp, B_FALSE, rollback_destroy, &cb);
4165         (void) zfs_iter_bookmarks(zhp, rollback_destroy, &cb);
4166
4167         if (cb.cb_error)
4168                 return (-1);
4169
4170         /*
4171          * Now that we have verified that the snapshot is the latest,
4172          * rollback to the given snapshot.
4173          */
4174
4175         if (zhp->zfs_type == ZFS_TYPE_VOLUME) {
4176                 if (zfs_which_resv_prop(zhp, &resv_prop) < 0)
4177                         return (-1);
4178                 old_volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE);
4179                 restore_resv =
4180                     (old_volsize == zfs_prop_get_int(zhp, resv_prop));
4181         }
4182
4183         /*
4184          * Pass both the filesystem and the wanted snapshot names,
4185          * we would get an error back if the snapshot is destroyed or
4186          * a new snapshot is created before this request is processed.
4187          */
4188         err = lzc_rollback_to(zhp->zfs_name, snap->zfs_name);
4189         if (err != 0) {
4190                 char errbuf[1024];
4191
4192                 (void) snprintf(errbuf, sizeof (errbuf),
4193                     dgettext(TEXT_DOMAIN, "cannot rollback '%s'"),
4194                     zhp->zfs_name);
4195                 switch (err) {
4196                 case EEXIST:
4197                         zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN,
4198                             "there is a snapshot or bookmark more recent "
4199                             "than '%s'"), snap->zfs_name);
4200                         (void) zfs_error(zhp->zfs_hdl, EZFS_EXISTS, errbuf);
4201                         break;
4202                 case ESRCH:
4203                         zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN,
4204                             "'%s' is not found among snapshots of '%s'"),
4205                             snap->zfs_name, zhp->zfs_name);
4206                         (void) zfs_error(zhp->zfs_hdl, EZFS_NOENT, errbuf);
4207                         break;
4208                 case EINVAL:
4209                         (void) zfs_error(zhp->zfs_hdl, EZFS_BADTYPE, errbuf);
4210                         break;
4211                 default:
4212                         (void) zfs_standard_error(zhp->zfs_hdl, err, errbuf);
4213                 }
4214                 return (err);
4215         }
4216
4217         /*
4218          * For volumes, if the pre-rollback volsize matched the pre-
4219          * rollback reservation and the volsize has changed then set
4220          * the reservation property to the post-rollback volsize.
4221          * Make a new handle since the rollback closed the dataset.
4222          */
4223         if ((zhp->zfs_type == ZFS_TYPE_VOLUME) &&
4224             (zhp = make_dataset_handle(zhp->zfs_hdl, zhp->zfs_name))) {
4225                 if (restore_resv) {
4226                         new_volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE);
4227                         if (old_volsize != new_volsize)
4228                                 err = zfs_prop_set_int(zhp, resv_prop,
4229                                     new_volsize);
4230                 }
4231                 zfs_close(zhp);
4232         }
4233         return (err);
4234 }
4235
4236 /*
4237  * Renames the given dataset.
4238  */
4239 int
4240 zfs_rename(zfs_handle_t *zhp, const char *source, const char *target,
4241     renameflags_t flags)
4242 {
4243         int ret = 0;
4244         zfs_cmd_t zc = { 0 };
4245         char *delim;
4246         prop_changelist_t *cl = NULL;
4247         zfs_handle_t *zhrp = NULL;
4248         char *parentname = NULL;
4249         char parent[ZFS_MAX_DATASET_NAME_LEN];
4250         char property[ZFS_MAXPROPLEN];
4251         libzfs_handle_t *hdl = zhp->zfs_hdl;
4252         char errbuf[1024];
4253
4254         /* if we have the same exact name, just return success */
4255         if (strcmp(zhp->zfs_name, target) == 0)
4256                 return (0);
4257
4258         (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
4259             "cannot rename to '%s'"), target);
4260
4261         if (source != NULL) {
4262                 /*
4263                  * This is recursive snapshots rename, put snapshot name
4264                  * (that might not exist) into zfs_name.
4265                  */
4266                 assert(flags.recurse);
4267
4268                 (void) strlcat(zhp->zfs_name, "@", sizeof(zhp->zfs_name));
4269                 (void) strlcat(zhp->zfs_name, source, sizeof(zhp->zfs_name));
4270                 zhp->zfs_type = ZFS_TYPE_SNAPSHOT;
4271         }
4272
4273         /* make sure source name is valid */
4274         if (!zfs_validate_name(hdl, zhp->zfs_name, zhp->zfs_type, B_TRUE))
4275                 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
4276
4277         /*
4278          * Make sure the target name is valid
4279          */
4280         if (zhp->zfs_type == ZFS_TYPE_SNAPSHOT) {
4281                 if ((strchr(target, '@') == NULL) ||
4282                     *target == '@') {
4283                         /*
4284                          * Snapshot target name is abbreviated,
4285                          * reconstruct full dataset name
4286                          */
4287                         (void) strlcpy(parent, zhp->zfs_name,
4288                             sizeof (parent));
4289                         delim = strchr(parent, '@');
4290                         if (strchr(target, '@') == NULL)
4291                                 *(++delim) = '\0';
4292                         else
4293                                 *delim = '\0';
4294                         (void) strlcat(parent, target, sizeof (parent));
4295                         target = parent;
4296                 } else {
4297                         /*
4298                          * Make sure we're renaming within the same dataset.
4299                          */
4300                         delim = strchr(target, '@');
4301                         if (strncmp(zhp->zfs_name, target, delim - target)
4302                             != 0 || zhp->zfs_name[delim - target] != '@') {
4303                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4304                                     "snapshots must be part of same "
4305                                     "dataset"));
4306                                 return (zfs_error(hdl, EZFS_CROSSTARGET,
4307                                     errbuf));
4308                         }
4309                 }
4310
4311                 if (!zfs_validate_name(hdl, target, zhp->zfs_type, B_TRUE))
4312                         return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
4313         } else {
4314                 if (flags.recurse) {
4315                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4316                             "recursive rename must be a snapshot"));
4317                         return (zfs_error(hdl, EZFS_BADTYPE, errbuf));
4318                 }
4319
4320                 if (!zfs_validate_name(hdl, target, zhp->zfs_type, B_TRUE))
4321                         return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
4322
4323                 /* validate parents */
4324                 if (check_parents(hdl, target, NULL, B_FALSE, NULL) != 0)
4325                         return (-1);
4326
4327                 /* make sure we're in the same pool */
4328                 verify((delim = strchr(target, '/')) != NULL);
4329                 if (strncmp(zhp->zfs_name, target, delim - target) != 0 ||
4330                     zhp->zfs_name[delim - target] != '/') {
4331                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4332                             "datasets must be within same pool"));
4333                         return (zfs_error(hdl, EZFS_CROSSTARGET, errbuf));
4334                 }
4335
4336                 /* new name cannot be a child of the current dataset name */
4337                 if (is_descendant(zhp->zfs_name, target)) {
4338                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4339                             "New dataset name cannot be a descendant of "
4340                             "current dataset name"));
4341                         return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
4342                 }
4343         }
4344
4345         (void) snprintf(errbuf, sizeof (errbuf),
4346             dgettext(TEXT_DOMAIN, "cannot rename '%s'"), zhp->zfs_name);
4347
4348         if (getzoneid() == GLOBAL_ZONEID &&
4349             zfs_prop_get_int(zhp, ZFS_PROP_ZONED)) {
4350                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4351                     "dataset is used in a non-global zone"));
4352                 return (zfs_error(hdl, EZFS_ZONED, errbuf));
4353         }
4354
4355         /*
4356          * Avoid unmounting file systems with mountpoint property set to
4357          * 'legacy' or 'none' even if -u option is not given.
4358          */
4359         if (zhp->zfs_type == ZFS_TYPE_FILESYSTEM &&
4360             !flags.recurse && !flags.nounmount &&
4361             zfs_prop_get(zhp, ZFS_PROP_MOUNTPOINT, property,
4362             sizeof (property), NULL, NULL, 0, B_FALSE) == 0 &&
4363             (strcmp(property, "legacy") == 0 ||
4364              strcmp(property, "none") == 0)) {
4365                 flags.nounmount = B_TRUE;
4366         }
4367         if (flags.recurse) {
4368
4369                 parentname = zfs_strdup(zhp->zfs_hdl, zhp->zfs_name);
4370                 if (parentname == NULL) {
4371                         ret = -1;
4372                         goto error;
4373                 }
4374                 delim = strchr(parentname, '@');
4375                 *delim = '\0';
4376                 zhrp = zfs_open(zhp->zfs_hdl, parentname, ZFS_TYPE_DATASET);
4377                 if (zhrp == NULL) {
4378                         ret = -1;
4379                         goto error;
4380                 }
4381         } else if (zhp->zfs_type != ZFS_TYPE_SNAPSHOT) {
4382                 if ((cl = changelist_gather(zhp, ZFS_PROP_NAME,
4383                     flags.nounmount ? CL_GATHER_DONT_UNMOUNT : 0,
4384                     flags.forceunmount ? MS_FORCE : 0)) == NULL) {
4385                         return (-1);
4386                 }
4387
4388                 if (changelist_haszonedchild(cl)) {
4389                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4390                             "child dataset with inherited mountpoint is used "
4391                             "in a non-global zone"));
4392                         (void) zfs_error(hdl, EZFS_ZONED, errbuf);
4393                         ret = -1;
4394                         goto error;
4395                 }
4396
4397                 if ((ret = changelist_prefix(cl)) != 0)
4398                         goto error;
4399         }
4400
4401         if (ZFS_IS_VOLUME(zhp))
4402                 zc.zc_objset_type = DMU_OST_ZVOL;
4403         else
4404                 zc.zc_objset_type = DMU_OST_ZFS;
4405
4406         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
4407         (void) strlcpy(zc.zc_value, target, sizeof (zc.zc_value));
4408
4409         zc.zc_cookie = flags.recurse ? 1 : 0;
4410         if (flags.nounmount)
4411                 zc.zc_cookie |= 2;
4412
4413         if ((ret = zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_RENAME, &zc)) != 0) {
4414                 /*
4415                  * if it was recursive, the one that actually failed will
4416                  * be in zc.zc_name
4417                  */
4418                 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
4419                     "cannot rename '%s'"), zc.zc_name);
4420
4421                 if (flags.recurse && errno == EEXIST) {
4422                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4423                             "a child dataset already has a snapshot "
4424                             "with the new name"));
4425                         (void) zfs_error(hdl, EZFS_EXISTS, errbuf);
4426                 } else {
4427                         (void) zfs_standard_error(zhp->zfs_hdl, errno, errbuf);
4428                 }
4429
4430                 /*
4431                  * On failure, we still want to remount any filesystems that
4432                  * were previously mounted, so we don't alter the system state.
4433                  */
4434                 if (cl != NULL)
4435                         (void) changelist_postfix(cl);
4436         } else {
4437                 if (cl != NULL) {
4438                         changelist_rename(cl, zfs_get_name(zhp), target);
4439                         ret = changelist_postfix(cl);
4440                 }
4441         }
4442
4443 error:
4444         if (parentname != NULL) {
4445                 free(parentname);
4446         }
4447         if (zhrp != NULL) {
4448                 zfs_close(zhrp);
4449         }
4450         if (cl != NULL) {
4451                 changelist_free(cl);
4452         }
4453         return (ret);
4454 }
4455
4456 nvlist_t *
4457 zfs_get_user_props(zfs_handle_t *zhp)
4458 {
4459         return (zhp->zfs_user_props);
4460 }
4461
4462 nvlist_t *
4463 zfs_get_recvd_props(zfs_handle_t *zhp)
4464 {
4465         if (zhp->zfs_recvd_props == NULL)
4466                 if (get_recvd_props_ioctl(zhp) != 0)
4467                         return (NULL);
4468         return (zhp->zfs_recvd_props);
4469 }
4470
4471 /*
4472  * This function is used by 'zfs list' to determine the exact set of columns to
4473  * display, and their maximum widths.  This does two main things:
4474  *
4475  *      - If this is a list of all properties, then expand the list to include
4476  *        all native properties, and set a flag so that for each dataset we look
4477  *        for new unique user properties and add them to the list.
4478  *
4479  *      - For non fixed-width properties, keep track of the maximum width seen
4480  *        so that we can size the column appropriately. If the user has
4481  *        requested received property values, we also need to compute the width
4482  *        of the RECEIVED column.
4483  */
4484 int
4485 zfs_expand_proplist(zfs_handle_t *zhp, zprop_list_t **plp, boolean_t received,
4486     boolean_t literal)
4487 {
4488         libzfs_handle_t *hdl = zhp->zfs_hdl;
4489         zprop_list_t *entry;
4490         zprop_list_t **last, **start;
4491         nvlist_t *userprops, *propval;
4492         nvpair_t *elem;
4493         char *strval;
4494         char buf[ZFS_MAXPROPLEN];
4495
4496         if (zprop_expand_list(hdl, plp, ZFS_TYPE_DATASET) != 0)
4497                 return (-1);
4498
4499         userprops = zfs_get_user_props(zhp);
4500
4501         entry = *plp;
4502         if (entry->pl_all && nvlist_next_nvpair(userprops, NULL) != NULL) {
4503                 /*
4504                  * Go through and add any user properties as necessary.  We
4505                  * start by incrementing our list pointer to the first
4506                  * non-native property.
4507                  */
4508                 start = plp;
4509                 while (*start != NULL) {
4510                         if ((*start)->pl_prop == ZPROP_INVAL)
4511                                 break;
4512                         start = &(*start)->pl_next;
4513                 }
4514
4515                 elem = NULL;
4516                 while ((elem = nvlist_next_nvpair(userprops, elem)) != NULL) {
4517                         /*
4518                          * See if we've already found this property in our list.
4519                          */
4520                         for (last = start; *last != NULL;
4521                             last = &(*last)->pl_next) {
4522                                 if (strcmp((*last)->pl_user_prop,
4523                                     nvpair_name(elem)) == 0)
4524                                         break;
4525                         }
4526
4527                         if (*last == NULL) {
4528                                 if ((entry = zfs_alloc(hdl,
4529                                     sizeof (zprop_list_t))) == NULL ||
4530                                     ((entry->pl_user_prop = zfs_strdup(hdl,
4531                                     nvpair_name(elem)))) == NULL) {
4532                                         free(entry);
4533                                         return (-1);
4534                                 }
4535
4536                                 entry->pl_prop = ZPROP_INVAL;
4537                                 entry->pl_width = strlen(nvpair_name(elem));
4538                                 entry->pl_all = B_TRUE;
4539                                 *last = entry;
4540                         }
4541                 }
4542         }
4543
4544         /*
4545          * Now go through and check the width of any non-fixed columns
4546          */
4547         for (entry = *plp; entry != NULL; entry = entry->pl_next) {
4548                 if (entry->pl_fixed && !literal)
4549                         continue;
4550
4551                 if (entry->pl_prop != ZPROP_INVAL) {
4552                         if (zfs_prop_get(zhp, entry->pl_prop,
4553                             buf, sizeof (buf), NULL, NULL, 0, literal) == 0) {
4554                                 if (strlen(buf) > entry->pl_width)
4555                                         entry->pl_width = strlen(buf);
4556                         }
4557                         if (received && zfs_prop_get_recvd(zhp,
4558                             zfs_prop_to_name(entry->pl_prop),
4559                             buf, sizeof (buf), literal) == 0)
4560                                 if (strlen(buf) > entry->pl_recvd_width)
4561                                         entry->pl_recvd_width = strlen(buf);
4562                 } else {
4563                         if (nvlist_lookup_nvlist(userprops, entry->pl_user_prop,
4564                             &propval) == 0) {
4565                                 verify(nvlist_lookup_string(propval,
4566                                     ZPROP_VALUE, &strval) == 0);
4567                                 if (strlen(strval) > entry->pl_width)
4568                                         entry->pl_width = strlen(strval);
4569                         }
4570                         if (received && zfs_prop_get_recvd(zhp,
4571                             entry->pl_user_prop,
4572                             buf, sizeof (buf), literal) == 0)
4573                                 if (strlen(buf) > entry->pl_recvd_width)
4574                                         entry->pl_recvd_width = strlen(buf);
4575                 }
4576         }
4577
4578         return (0);
4579 }
4580
4581 int
4582 zfs_deleg_share_nfs(libzfs_handle_t *hdl, char *dataset, char *path,
4583     char *resource, void *export, void *sharetab,
4584     int sharemax, zfs_share_op_t operation)
4585 {
4586         zfs_cmd_t zc = { 0 };
4587         int error;
4588
4589         (void) strlcpy(zc.zc_name, dataset, sizeof (zc.zc_name));
4590         (void) strlcpy(zc.zc_value, path, sizeof (zc.zc_value));
4591         if (resource)
4592                 (void) strlcpy(zc.zc_string, resource, sizeof (zc.zc_string));
4593         zc.zc_share.z_sharedata = (uint64_t)(uintptr_t)sharetab;
4594         zc.zc_share.z_exportdata = (uint64_t)(uintptr_t)export;
4595         zc.zc_share.z_sharetype = operation;
4596         zc.zc_share.z_sharemax = sharemax;
4597         error = ioctl(hdl->libzfs_fd, ZFS_IOC_SHARE, &zc);
4598         return (error);
4599 }
4600
4601 void
4602 zfs_prune_proplist(zfs_handle_t *zhp, uint8_t *props)
4603 {
4604         nvpair_t *curr;
4605
4606         /*
4607          * Keep a reference to the props-table against which we prune the
4608          * properties.
4609          */
4610         zhp->zfs_props_table = props;
4611
4612         curr = nvlist_next_nvpair(zhp->zfs_props, NULL);
4613
4614         while (curr) {
4615                 zfs_prop_t zfs_prop = zfs_name_to_prop(nvpair_name(curr));
4616                 nvpair_t *next = nvlist_next_nvpair(zhp->zfs_props, curr);
4617
4618                 /*
4619                  * User properties will result in ZPROP_INVAL, and since we
4620                  * only know how to prune standard ZFS properties, we always
4621                  * leave these in the list.  This can also happen if we
4622                  * encounter an unknown DSL property (when running older
4623                  * software, for example).
4624                  */
4625                 if (zfs_prop != ZPROP_INVAL && props[zfs_prop] == B_FALSE)
4626                         (void) nvlist_remove(zhp->zfs_props,
4627                             nvpair_name(curr), nvpair_type(curr));
4628                 curr = next;
4629         }
4630 }
4631
4632 #ifdef illumos
4633 static int
4634 zfs_smb_acl_mgmt(libzfs_handle_t *hdl, char *dataset, char *path,
4635     zfs_smb_acl_op_t cmd, char *resource1, char *resource2)
4636 {
4637         zfs_cmd_t zc = { 0 };
4638         nvlist_t *nvlist = NULL;
4639         int error;
4640
4641         (void) strlcpy(zc.zc_name, dataset, sizeof (zc.zc_name));
4642         (void) strlcpy(zc.zc_value, path, sizeof (zc.zc_value));
4643         zc.zc_cookie = (uint64_t)cmd;
4644
4645         if (cmd == ZFS_SMB_ACL_RENAME) {
4646                 if (nvlist_alloc(&nvlist, NV_UNIQUE_NAME, 0) != 0) {
4647                         (void) no_memory(hdl);
4648                         return (0);
4649                 }
4650         }
4651
4652         switch (cmd) {
4653         case ZFS_SMB_ACL_ADD:
4654         case ZFS_SMB_ACL_REMOVE:
4655                 (void) strlcpy(zc.zc_string, resource1, sizeof (zc.zc_string));
4656                 break;
4657         case ZFS_SMB_ACL_RENAME:
4658                 if (nvlist_add_string(nvlist, ZFS_SMB_ACL_SRC,
4659                     resource1) != 0) {
4660                                 (void) no_memory(hdl);
4661                                 return (-1);
4662                 }
4663                 if (nvlist_add_string(nvlist, ZFS_SMB_ACL_TARGET,
4664                     resource2) != 0) {
4665                                 (void) no_memory(hdl);
4666                                 return (-1);
4667                 }
4668                 if (zcmd_write_src_nvlist(hdl, &zc, nvlist) != 0) {
4669                         nvlist_free(nvlist);
4670                         return (-1);
4671                 }
4672                 break;
4673         case ZFS_SMB_ACL_PURGE:
4674                 break;
4675         default:
4676                 return (-1);
4677         }
4678         error = ioctl(hdl->libzfs_fd, ZFS_IOC_SMB_ACL, &zc);
4679         nvlist_free(nvlist);
4680         return (error);
4681 }
4682
4683 int
4684 zfs_smb_acl_add(libzfs_handle_t *hdl, char *dataset,
4685     char *path, char *resource)
4686 {
4687         return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_ADD,
4688             resource, NULL));
4689 }
4690
4691 int
4692 zfs_smb_acl_remove(libzfs_handle_t *hdl, char *dataset,
4693     char *path, char *resource)
4694 {
4695         return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_REMOVE,
4696             resource, NULL));
4697 }
4698
4699 int
4700 zfs_smb_acl_purge(libzfs_handle_t *hdl, char *dataset, char *path)
4701 {
4702         return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_PURGE,
4703             NULL, NULL));
4704 }
4705
4706 int
4707 zfs_smb_acl_rename(libzfs_handle_t *hdl, char *dataset, char *path,
4708     char *oldname, char *newname)
4709 {
4710         return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_RENAME,
4711             oldname, newname));
4712 }
4713 #endif  /* illumos */
4714
4715 int
4716 zfs_userspace(zfs_handle_t *zhp, zfs_userquota_prop_t type,
4717     zfs_userspace_cb_t func, void *arg)
4718 {
4719         zfs_cmd_t zc = { 0 };
4720         zfs_useracct_t buf[100];
4721         libzfs_handle_t *hdl = zhp->zfs_hdl;
4722         int ret;
4723
4724         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
4725
4726         zc.zc_objset_type = type;
4727         zc.zc_nvlist_dst = (uintptr_t)buf;
4728
4729         for (;;) {
4730                 zfs_useracct_t *zua = buf;
4731
4732                 zc.zc_nvlist_dst_size = sizeof (buf);
4733                 if (zfs_ioctl(hdl, ZFS_IOC_USERSPACE_MANY, &zc) != 0) {
4734                         char errbuf[1024];
4735
4736                         (void) snprintf(errbuf, sizeof (errbuf),
4737                             dgettext(TEXT_DOMAIN,
4738                             "cannot get used/quota for %s"), zc.zc_name);
4739                         return (zfs_standard_error_fmt(hdl, errno, errbuf));
4740                 }
4741                 if (zc.zc_nvlist_dst_size == 0)
4742                         break;
4743
4744                 while (zc.zc_nvlist_dst_size > 0) {
4745                         if ((ret = func(arg, zua->zu_domain, zua->zu_rid,
4746                             zua->zu_space)) != 0)
4747                                 return (ret);
4748                         zua++;
4749                         zc.zc_nvlist_dst_size -= sizeof (zfs_useracct_t);
4750                 }
4751         }
4752
4753         return (0);
4754 }
4755
4756 struct holdarg {
4757         nvlist_t *nvl;
4758         const char *snapname;
4759         const char *tag;
4760         boolean_t recursive;
4761         int error;
4762 };
4763
4764 static int
4765 zfs_hold_one(zfs_handle_t *zhp, void *arg)
4766 {
4767         struct holdarg *ha = arg;
4768         char name[ZFS_MAX_DATASET_NAME_LEN];
4769         int rv = 0;
4770
4771         (void) snprintf(name, sizeof (name),
4772             "%s@%s", zhp->zfs_name, ha->snapname);
4773
4774         if (lzc_exists(name))
4775                 fnvlist_add_string(ha->nvl, name, ha->tag);
4776
4777         if (ha->recursive)
4778                 rv = zfs_iter_filesystems(zhp, zfs_hold_one, ha);
4779         zfs_close(zhp);
4780         return (rv);
4781 }
4782
4783 int
4784 zfs_hold(zfs_handle_t *zhp, const char *snapname, const char *tag,
4785     boolean_t recursive, int cleanup_fd)
4786 {
4787         int ret;
4788         struct holdarg ha;
4789
4790         ha.nvl = fnvlist_alloc();
4791         ha.snapname = snapname;
4792         ha.tag = tag;
4793         ha.recursive = recursive;
4794         (void) zfs_hold_one(zfs_handle_dup(zhp), &ha);
4795
4796         if (nvlist_empty(ha.nvl)) {
4797                 char errbuf[1024];
4798
4799                 fnvlist_free(ha.nvl);
4800                 ret = ENOENT;
4801                 (void) snprintf(errbuf, sizeof (errbuf),
4802                     dgettext(TEXT_DOMAIN,
4803                     "cannot hold snapshot '%s@%s'"),
4804                     zhp->zfs_name, snapname);
4805                 (void) zfs_standard_error(zhp->zfs_hdl, ret, errbuf);
4806                 return (ret);
4807         }
4808
4809         ret = zfs_hold_nvl(zhp, cleanup_fd, ha.nvl);
4810         fnvlist_free(ha.nvl);
4811
4812         return (ret);
4813 }
4814
4815 int
4816 zfs_hold_nvl(zfs_handle_t *zhp, int cleanup_fd, nvlist_t *holds)
4817 {
4818         int ret;
4819         nvlist_t *errors;
4820         libzfs_handle_t *hdl = zhp->zfs_hdl;
4821         char errbuf[1024];
4822         nvpair_t *elem;
4823
4824         errors = NULL;
4825         ret = lzc_hold(holds, cleanup_fd, &errors);
4826
4827         if (ret == 0) {
4828                 /* There may be errors even in the success case. */
4829                 fnvlist_free(errors);
4830                 return (0);
4831         }
4832
4833         if (nvlist_empty(errors)) {
4834                 /* no hold-specific errors */
4835                 (void) snprintf(errbuf, sizeof (errbuf),
4836                     dgettext(TEXT_DOMAIN, "cannot hold"));
4837                 switch (ret) {
4838                 case ENOTSUP:
4839                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4840                             "pool must be upgraded"));
4841                         (void) zfs_error(hdl, EZFS_BADVERSION, errbuf);
4842                         break;
4843                 case EINVAL:
4844                         (void) zfs_error(hdl, EZFS_BADTYPE, errbuf);
4845                         break;
4846                 default:
4847                         (void) zfs_standard_error(hdl, ret, errbuf);
4848                 }
4849         }
4850
4851         for (elem = nvlist_next_nvpair(errors, NULL);
4852             elem != NULL;
4853             elem = nvlist_next_nvpair(errors, elem)) {
4854                 (void) snprintf(errbuf, sizeof (errbuf),
4855                     dgettext(TEXT_DOMAIN,
4856                     "cannot hold snapshot '%s'"), nvpair_name(elem));
4857                 switch (fnvpair_value_int32(elem)) {
4858                 case E2BIG:
4859                         /*
4860                          * Temporary tags wind up having the ds object id
4861                          * prepended. So even if we passed the length check
4862                          * above, it's still possible for the tag to wind
4863                          * up being slightly too long.
4864                          */
4865                         (void) zfs_error(hdl, EZFS_TAGTOOLONG, errbuf);
4866                         break;
4867                 case EINVAL:
4868                         (void) zfs_error(hdl, EZFS_BADTYPE, errbuf);
4869                         break;
4870                 case EEXIST:
4871                         (void) zfs_error(hdl, EZFS_REFTAG_HOLD, errbuf);
4872                         break;
4873                 default:
4874                         (void) zfs_standard_error(hdl,
4875                             fnvpair_value_int32(elem), errbuf);
4876                 }
4877         }
4878
4879         fnvlist_free(errors);
4880         return (ret);
4881 }
4882
4883 static int
4884 zfs_release_one(zfs_handle_t *zhp, void *arg)
4885 {
4886         struct holdarg *ha = arg;
4887         char name[ZFS_MAX_DATASET_NAME_LEN];
4888         int rv = 0;
4889         nvlist_t *existing_holds;
4890
4891         (void) snprintf(name, sizeof (name),
4892             "%s@%s", zhp->zfs_name, ha->snapname);
4893
4894         if (lzc_get_holds(name, &existing_holds) != 0) {
4895                 ha->error = ENOENT;
4896         } else if (!nvlist_exists(existing_holds, ha->tag)) {
4897                 ha->error = ESRCH;
4898         } else {
4899                 nvlist_t *torelease = fnvlist_alloc();
4900                 fnvlist_add_boolean(torelease, ha->tag);
4901                 fnvlist_add_nvlist(ha->nvl, name, torelease);
4902                 fnvlist_free(torelease);
4903         }
4904
4905         if (ha->recursive)
4906                 rv = zfs_iter_filesystems(zhp, zfs_release_one, ha);
4907         zfs_close(zhp);
4908         return (rv);
4909 }
4910
4911 int
4912 zfs_release(zfs_handle_t *zhp, const char *snapname, const char *tag,
4913     boolean_t recursive)
4914 {
4915         int ret;
4916         struct holdarg ha;
4917         nvlist_t *errors = NULL;
4918         nvpair_t *elem;
4919         libzfs_handle_t *hdl = zhp->zfs_hdl;
4920         char errbuf[1024];
4921
4922         ha.nvl = fnvlist_alloc();
4923         ha.snapname = snapname;
4924         ha.tag = tag;
4925         ha.recursive = recursive;
4926         ha.error = 0;
4927         (void) zfs_release_one(zfs_handle_dup(zhp), &ha);
4928
4929         if (nvlist_empty(ha.nvl)) {
4930                 fnvlist_free(ha.nvl);
4931                 ret = ha.error;
4932                 (void) snprintf(errbuf, sizeof (errbuf),
4933                     dgettext(TEXT_DOMAIN,
4934                     "cannot release hold from snapshot '%s@%s'"),
4935                     zhp->zfs_name, snapname);
4936                 if (ret == ESRCH) {
4937                         (void) zfs_error(hdl, EZFS_REFTAG_RELE, errbuf);
4938                 } else {
4939                         (void) zfs_standard_error(hdl, ret, errbuf);
4940                 }
4941                 return (ret);
4942         }
4943
4944         ret = lzc_release(ha.nvl, &errors);
4945         fnvlist_free(ha.nvl);
4946
4947         if (ret == 0) {
4948                 /* There may be errors even in the success case. */
4949                 fnvlist_free(errors);
4950                 return (0);
4951         }
4952
4953         if (nvlist_empty(errors)) {
4954                 /* no hold-specific errors */
4955                 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
4956                     "cannot release"));
4957                 switch (errno) {
4958                 case ENOTSUP:
4959                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4960                             "pool must be upgraded"));
4961                         (void) zfs_error(hdl, EZFS_BADVERSION, errbuf);
4962                         break;
4963                 default:
4964                         (void) zfs_standard_error_fmt(hdl, errno, errbuf);
4965                 }
4966         }
4967
4968         for (elem = nvlist_next_nvpair(errors, NULL);
4969             elem != NULL;
4970             elem = nvlist_next_nvpair(errors, elem)) {
4971                 (void) snprintf(errbuf, sizeof (errbuf),
4972                     dgettext(TEXT_DOMAIN,
4973                     "cannot release hold from snapshot '%s'"),
4974                     nvpair_name(elem));
4975                 switch (fnvpair_value_int32(elem)) {
4976                 case ESRCH:
4977                         (void) zfs_error(hdl, EZFS_REFTAG_RELE, errbuf);
4978                         break;
4979                 case EINVAL:
4980                         (void) zfs_error(hdl, EZFS_BADTYPE, errbuf);
4981                         break;
4982                 default:
4983                         (void) zfs_standard_error_fmt(hdl,
4984                             fnvpair_value_int32(elem), errbuf);
4985                 }
4986         }
4987
4988         fnvlist_free(errors);
4989         return (ret);
4990 }
4991
4992 int
4993 zfs_get_fsacl(zfs_handle_t *zhp, nvlist_t **nvl)
4994 {
4995         zfs_cmd_t zc = { 0 };
4996         libzfs_handle_t *hdl = zhp->zfs_hdl;
4997         int nvsz = 2048;
4998         void *nvbuf;
4999         int err = 0;
5000         char errbuf[1024];
5001
5002         assert(zhp->zfs_type == ZFS_TYPE_VOLUME ||
5003             zhp->zfs_type == ZFS_TYPE_FILESYSTEM);
5004
5005 tryagain:
5006
5007         nvbuf = malloc(nvsz);
5008         if (nvbuf == NULL) {
5009                 err = (zfs_error(hdl, EZFS_NOMEM, strerror(errno)));
5010                 goto out;
5011         }
5012
5013         zc.zc_nvlist_dst_size = nvsz;
5014         zc.zc_nvlist_dst = (uintptr_t)nvbuf;
5015
5016         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
5017
5018         if (ioctl(hdl->libzfs_fd, ZFS_IOC_GET_FSACL, &zc) != 0) {
5019                 (void) snprintf(errbuf, sizeof (errbuf),
5020                     dgettext(TEXT_DOMAIN, "cannot get permissions on '%s'"),
5021                     zc.zc_name);
5022                 switch (errno) {
5023                 case ENOMEM:
5024                         free(nvbuf);
5025                         nvsz = zc.zc_nvlist_dst_size;
5026                         goto tryagain;
5027
5028                 case ENOTSUP:
5029                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
5030                             "pool must be upgraded"));
5031                         err = zfs_error(hdl, EZFS_BADVERSION, errbuf);
5032                         break;
5033                 case EINVAL:
5034                         err = zfs_error(hdl, EZFS_BADTYPE, errbuf);
5035                         break;
5036                 case ENOENT:
5037                         err = zfs_error(hdl, EZFS_NOENT, errbuf);
5038                         break;
5039                 default:
5040                         err = zfs_standard_error_fmt(hdl, errno, errbuf);
5041                         break;
5042                 }
5043         } else {
5044                 /* success */
5045                 int rc = nvlist_unpack(nvbuf, zc.zc_nvlist_dst_size, nvl, 0);
5046                 if (rc) {
5047                         (void) snprintf(errbuf, sizeof (errbuf), dgettext(
5048                             TEXT_DOMAIN, "cannot get permissions on '%s'"),
5049                             zc.zc_name);
5050                         err = zfs_standard_error_fmt(hdl, rc, errbuf);
5051                 }
5052         }
5053
5054         free(nvbuf);
5055 out:
5056         return (err);
5057 }
5058
5059 int
5060 zfs_set_fsacl(zfs_handle_t *zhp, boolean_t un, nvlist_t *nvl)
5061 {
5062         zfs_cmd_t zc = { 0 };
5063         libzfs_handle_t *hdl = zhp->zfs_hdl;
5064         char *nvbuf;
5065         char errbuf[1024];
5066         size_t nvsz;
5067         int err;
5068
5069         assert(zhp->zfs_type == ZFS_TYPE_VOLUME ||
5070             zhp->zfs_type == ZFS_TYPE_FILESYSTEM);
5071
5072         err = nvlist_size(nvl, &nvsz, NV_ENCODE_NATIVE);
5073         assert(err == 0);
5074
5075         nvbuf = malloc(nvsz);
5076
5077         err = nvlist_pack(nvl, &nvbuf, &nvsz, NV_ENCODE_NATIVE, 0);
5078         assert(err == 0);
5079
5080         zc.zc_nvlist_src_size = nvsz;
5081         zc.zc_nvlist_src = (uintptr_t)nvbuf;
5082         zc.zc_perm_action = un;
5083
5084         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
5085
5086         if (zfs_ioctl(hdl, ZFS_IOC_SET_FSACL, &zc) != 0) {
5087                 (void) snprintf(errbuf, sizeof (errbuf),
5088                     dgettext(TEXT_DOMAIN, "cannot set permissions on '%s'"),
5089                     zc.zc_name);
5090                 switch (errno) {
5091                 case ENOTSUP:
5092                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
5093                             "pool must be upgraded"));
5094                         err = zfs_error(hdl, EZFS_BADVERSION, errbuf);
5095                         break;
5096                 case EINVAL:
5097                         err = zfs_error(hdl, EZFS_BADTYPE, errbuf);
5098                         break;
5099                 case ENOENT:
5100                         err = zfs_error(hdl, EZFS_NOENT, errbuf);
5101                         break;
5102                 default:
5103                         err = zfs_standard_error_fmt(hdl, errno, errbuf);
5104                         break;
5105                 }
5106         }
5107
5108         free(nvbuf);
5109
5110         return (err);
5111 }
5112
5113 int
5114 zfs_get_holds(zfs_handle_t *zhp, nvlist_t **nvl)
5115 {
5116         int err;
5117         char errbuf[1024];
5118
5119         err = lzc_get_holds(zhp->zfs_name, nvl);
5120
5121         if (err != 0) {
5122                 libzfs_handle_t *hdl = zhp->zfs_hdl;
5123
5124                 (void) snprintf(errbuf, sizeof (errbuf),
5125                     dgettext(TEXT_DOMAIN, "cannot get holds for '%s'"),
5126                     zhp->zfs_name);
5127                 switch (err) {
5128                 case ENOTSUP:
5129                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
5130                             "pool must be upgraded"));
5131                         err = zfs_error(hdl, EZFS_BADVERSION, errbuf);
5132                         break;
5133                 case EINVAL:
5134                         err = zfs_error(hdl, EZFS_BADTYPE, errbuf);
5135                         break;
5136                 case ENOENT:
5137                         err = zfs_error(hdl, EZFS_NOENT, errbuf);
5138                         break;
5139                 default:
5140                         err = zfs_standard_error_fmt(hdl, errno, errbuf);
5141                         break;
5142                 }
5143         }
5144
5145         return (err);
5146 }
5147
5148 /*
5149  * Convert the zvol's volume size to an appropriate reservation.
5150  * Note: If this routine is updated, it is necessary to update the ZFS test
5151  * suite's shell version in reservation.kshlib.
5152  */
5153 uint64_t
5154 zvol_volsize_to_reservation(uint64_t volsize, nvlist_t *props)
5155 {
5156         uint64_t numdb;
5157         uint64_t nblocks, volblocksize;
5158         int ncopies;
5159         char *strval;
5160
5161         if (nvlist_lookup_string(props,
5162             zfs_prop_to_name(ZFS_PROP_COPIES), &strval) == 0)
5163                 ncopies = atoi(strval);
5164         else
5165                 ncopies = 1;
5166         if (nvlist_lookup_uint64(props,
5167             zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE),
5168             &volblocksize) != 0)
5169                 volblocksize = ZVOL_DEFAULT_BLOCKSIZE;
5170         nblocks = volsize/volblocksize;
5171         /* start with metadnode L0-L6 */
5172         numdb = 7;
5173         /* calculate number of indirects */
5174         while (nblocks > 1) {
5175                 nblocks += DNODES_PER_LEVEL - 1;
5176                 nblocks /= DNODES_PER_LEVEL;
5177                 numdb += nblocks;
5178         }
5179         numdb *= MIN(SPA_DVAS_PER_BP, ncopies + 1);
5180         volsize *= ncopies;
5181         /*
5182          * this is exactly DN_MAX_INDBLKSHIFT when metadata isn't
5183          * compressed, but in practice they compress down to about
5184          * 1100 bytes
5185          */
5186         numdb *= 1ULL << DN_MAX_INDBLKSHIFT;
5187         volsize += numdb;
5188         return (volsize);
5189 }
5190
5191 /*
5192  * Attach/detach the given filesystem to/from the given jail.
5193  */
5194 int
5195 zfs_jail(zfs_handle_t *zhp, int jailid, int attach)
5196 {
5197         libzfs_handle_t *hdl = zhp->zfs_hdl;
5198         zfs_cmd_t zc = { 0 };
5199         char errbuf[1024];
5200         unsigned long cmd;
5201         int ret;
5202
5203         if (attach) {
5204                 (void) snprintf(errbuf, sizeof (errbuf),
5205                     dgettext(TEXT_DOMAIN, "cannot jail '%s'"), zhp->zfs_name);
5206         } else {
5207                 (void) snprintf(errbuf, sizeof (errbuf),
5208                     dgettext(TEXT_DOMAIN, "cannot unjail '%s'"), zhp->zfs_name);
5209         }
5210
5211         switch (zhp->zfs_type) {
5212         case ZFS_TYPE_VOLUME:
5213                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
5214                     "volumes can not be jailed"));
5215                 return (zfs_error(hdl, EZFS_BADTYPE, errbuf));
5216         case ZFS_TYPE_SNAPSHOT:
5217                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
5218                     "snapshots can not be jailed"));
5219                 return (zfs_error(hdl, EZFS_BADTYPE, errbuf));
5220         }
5221         assert(zhp->zfs_type == ZFS_TYPE_FILESYSTEM);
5222
5223         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
5224         zc.zc_objset_type = DMU_OST_ZFS;
5225         zc.zc_jailid = jailid;
5226
5227         cmd = attach ? ZFS_IOC_JAIL : ZFS_IOC_UNJAIL;
5228         if ((ret = ioctl(hdl->libzfs_fd, cmd, &zc)) != 0)
5229                 zfs_standard_error(hdl, errno, errbuf);
5230
5231         return (ret);
5232 }