8115 parallel zfs mount

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21 
  22 /*
  23  * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
  24  * Copyright (c) 2013, Joyent, Inc. All rights reserved.
  25  * Copyright (c) 2011, 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 Nexenta Systems, Inc.
  32  * Copyright 2016 Igor Kozhukhov <ikozhukhov@gmail.com>
  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 #include <ucred.h>
  54 #include <idmap.h>
  55 #include <aclutils.h>
  56 #include <directory.h>
  57 #include <time.h>
  58 
  59 #include <sys/dnode.h>
  60 #include <sys/spa.h>
  61 #include <sys/zap.h>
  62 #include <libzfs.h>
  63 
  64 #include "zfs_namecheck.h"
  65 #include "zfs_prop.h"
  66 #include "libzfs_impl.h"
  67 #include "zfs_deleg.h"
  68 
  69 static int userquota_propname_decode(const char *propname, boolean_t zoned,
  70     zfs_userquota_prop_t *typep, char *domain, int domainlen, uint64_t *ridp);
  71 
  72 /*
  73  * Given a single type (not a mask of types), return the type in a human
  74  * readable form.
  75  */
  76 const char *
  77 zfs_type_to_name(zfs_type_t type)
  78 {
  79         switch (type) {
  80         case ZFS_TYPE_FILESYSTEM:
  81                 return (dgettext(TEXT_DOMAIN, "filesystem"));
  82         case ZFS_TYPE_SNAPSHOT:
  83                 return (dgettext(TEXT_DOMAIN, "snapshot"));
  84         case ZFS_TYPE_VOLUME:
  85                 return (dgettext(TEXT_DOMAIN, "volume"));
  86         case ZFS_TYPE_POOL:
  87                 return (dgettext(TEXT_DOMAIN, "pool"));
  88         case ZFS_TYPE_BOOKMARK:
  89                 return (dgettext(TEXT_DOMAIN, "bookmark"));
  90         default:
  91                 assert(!"unhandled zfs_type_t");
  92         }
  93 
  94         return (NULL);
  95 }
  96 
  97 /*
  98  * Validate a ZFS path.  This is used even before trying to open the dataset, to
  99  * provide a more meaningful error message.  We call zfs_error_aux() to
 100  * explain exactly why the name was not valid.
 101  */
 102 int
 103 zfs_validate_name(libzfs_handle_t *hdl, const char *path, int type,
 104     boolean_t modifying)
 105 {
 106         namecheck_err_t why;
 107         char what;
 108 
 109         if (entity_namecheck(path, &why, &what) != 0) {
 110                 if (hdl != NULL) {
 111                         switch (why) {
 112                         case NAME_ERR_TOOLONG:
 113                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 114                                     "name is too long"));
 115                                 break;
 116 
 117                         case NAME_ERR_LEADING_SLASH:
 118                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 119                                     "leading slash in name"));
 120                                 break;
 121 
 122                         case NAME_ERR_EMPTY_COMPONENT:
 123                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 124                                     "empty component in name"));
 125                                 break;
 126 
 127                         case NAME_ERR_TRAILING_SLASH:
 128                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 129                                     "trailing slash in name"));
 130                                 break;
 131 
 132                         case NAME_ERR_INVALCHAR:
 133                                 zfs_error_aux(hdl,
 134                                     dgettext(TEXT_DOMAIN, "invalid character "
 135                                     "'%c' in name"), what);
 136                                 break;
 137 
 138                         case NAME_ERR_MULTIPLE_DELIMITERS:
 139                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 140                                     "multiple '@' and/or '#' delimiters in "
 141                                     "name"));
 142                                 break;
 143 
 144                         case NAME_ERR_NOLETTER:
 145                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 146                                     "pool doesn't begin with a letter"));
 147                                 break;
 148 
 149                         case NAME_ERR_RESERVED:
 150                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 151                                     "name is reserved"));
 152                                 break;
 153 
 154                         case NAME_ERR_DISKLIKE:
 155                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 156                                     "reserved disk name"));
 157                                 break;
 158 
 159                         default:
 160                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 161                                     "(%d) not defined"), why);
 162                                 break;
 163                         }
 164                 }
 165 
 166                 return (0);
 167         }
 168 
 169         if (!(type & ZFS_TYPE_SNAPSHOT) && strchr(path, '@') != NULL) {
 170                 if (hdl != NULL)
 171                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 172                             "snapshot delimiter '@' is not expected here"));
 173                 return (0);
 174         }
 175 
 176         if (type == ZFS_TYPE_SNAPSHOT && strchr(path, '@') == NULL) {
 177                 if (hdl != NULL)
 178                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 179                             "missing '@' delimiter in snapshot name"));
 180                 return (0);
 181         }
 182 
 183         if (!(type & ZFS_TYPE_BOOKMARK) && strchr(path, '#') != NULL) {
 184                 if (hdl != NULL)
 185                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 186                             "bookmark delimiter '#' is not expected here"));
 187                 return (0);
 188         }
 189 
 190         if (type == ZFS_TYPE_BOOKMARK && strchr(path, '#') == NULL) {
 191                 if (hdl != NULL)
 192                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 193                             "missing '#' delimiter in bookmark name"));
 194                 return (0);
 195         }
 196 
 197         if (modifying && strchr(path, '%') != NULL) {
 198                 if (hdl != NULL)
 199                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 200                             "invalid character %c in name"), '%');
 201                 return (0);
 202         }
 203 
 204         return (-1);
 205 }
 206 
 207 int
 208 zfs_name_valid(const char *name, zfs_type_t type)
 209 {
 210         if (type == ZFS_TYPE_POOL)
 211                 return (zpool_name_valid(NULL, B_FALSE, name));
 212         return (zfs_validate_name(NULL, name, type, B_FALSE));
 213 }
 214 
 215 /*
 216  * This function takes the raw DSL properties, and filters out the user-defined
 217  * properties into a separate nvlist.
 218  */
 219 static nvlist_t *
 220 process_user_props(zfs_handle_t *zhp, nvlist_t *props)
 221 {
 222         libzfs_handle_t *hdl = zhp->zfs_hdl;
 223         nvpair_t *elem;
 224         nvlist_t *propval;
 225         nvlist_t *nvl;
 226 
 227         if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0) != 0) {
 228                 (void) no_memory(hdl);
 229                 return (NULL);
 230         }
 231 
 232         elem = NULL;
 233         while ((elem = nvlist_next_nvpair(props, elem)) != NULL) {
 234                 if (!zfs_prop_user(nvpair_name(elem)))
 235                         continue;
 236 
 237                 verify(nvpair_value_nvlist(elem, &propval) == 0);
 238                 if (nvlist_add_nvlist(nvl, nvpair_name(elem), propval) != 0) {
 239                         nvlist_free(nvl);
 240                         (void) no_memory(hdl);
 241                         return (NULL);
 242                 }
 243         }
 244 
 245         return (nvl);
 246 }
 247 
 248 static zpool_handle_t *
 249 zpool_add_handle(zfs_handle_t *zhp, const char *pool_name)
 250 {
 251         libzfs_handle_t *hdl = zhp->zfs_hdl;
 252         zpool_handle_t *zph;
 253 
 254         if ((zph = zpool_open_canfail(hdl, pool_name)) != NULL) {
 255                 if (hdl->libzfs_pool_handles != NULL)
 256                         zph->zpool_next = hdl->libzfs_pool_handles;
 257                 hdl->libzfs_pool_handles = zph;
 258         }
 259         return (zph);
 260 }
 261 
 262 static zpool_handle_t *
 263 zpool_find_handle(zfs_handle_t *zhp, const char *pool_name, int len)
 264 {
 265         libzfs_handle_t *hdl = zhp->zfs_hdl;
 266         zpool_handle_t *zph = hdl->libzfs_pool_handles;
 267 
 268         while ((zph != NULL) &&
 269             (strncmp(pool_name, zpool_get_name(zph), len) != 0))
 270                 zph = zph->zpool_next;
 271         return (zph);
 272 }
 273 
 274 /*
 275  * Returns a handle to the pool that contains the provided dataset.
 276  * If a handle to that pool already exists then that handle is returned.
 277  * Otherwise, a new handle is created and added to the list of handles.
 278  */
 279 static zpool_handle_t *
 280 zpool_handle(zfs_handle_t *zhp)
 281 {
 282         char *pool_name;
 283         int len;
 284         zpool_handle_t *zph;
 285 
 286         len = strcspn(zhp->zfs_name, "/@#") + 1;
 287         pool_name = zfs_alloc(zhp->zfs_hdl, len);
 288         (void) strlcpy(pool_name, zhp->zfs_name, len);
 289 
 290         zph = zpool_find_handle(zhp, pool_name, len);
 291         if (zph == NULL)
 292                 zph = zpool_add_handle(zhp, pool_name);
 293 
 294         free(pool_name);
 295         return (zph);
 296 }
 297 
 298 void
 299 zpool_free_handles(libzfs_handle_t *hdl)
 300 {
 301         zpool_handle_t *next, *zph = hdl->libzfs_pool_handles;
 302 
 303         while (zph != NULL) {
 304                 next = zph->zpool_next;
 305                 zpool_close(zph);
 306                 zph = next;
 307         }
 308         hdl->libzfs_pool_handles = NULL;
 309 }
 310 
 311 /*
 312  * Utility function to gather stats (objset and zpl) for the given object.
 313  */
 314 static int
 315 get_stats_ioctl(zfs_handle_t *zhp, zfs_cmd_t *zc)
 316 {
 317         libzfs_handle_t *hdl = zhp->zfs_hdl;
 318 
 319         (void) strlcpy(zc->zc_name, zhp->zfs_name, sizeof (zc->zc_name));
 320 
 321         while (ioctl(hdl->libzfs_fd, ZFS_IOC_OBJSET_STATS, zc) != 0) {
 322                 if (errno == ENOMEM) {
 323                         if (zcmd_expand_dst_nvlist(hdl, zc) != 0) {
 324                                 return (-1);
 325                         }
 326                 } else {
 327                         return (-1);
 328                 }
 329         }
 330         return (0);
 331 }
 332 
 333 /*
 334  * Utility function to get the received properties of the given object.
 335  */
 336 static int
 337 get_recvd_props_ioctl(zfs_handle_t *zhp)
 338 {
 339         libzfs_handle_t *hdl = zhp->zfs_hdl;
 340         nvlist_t *recvdprops;
 341         zfs_cmd_t zc = { 0 };
 342         int err;
 343 
 344         if (zcmd_alloc_dst_nvlist(hdl, &zc, 0) != 0)
 345                 return (-1);
 346 
 347         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
 348 
 349         while (ioctl(hdl->libzfs_fd, ZFS_IOC_OBJSET_RECVD_PROPS, &zc) != 0) {
 350                 if (errno == ENOMEM) {
 351                         if (zcmd_expand_dst_nvlist(hdl, &zc) != 0) {
 352                                 return (-1);
 353                         }
 354                 } else {
 355                         zcmd_free_nvlists(&zc);
 356                         return (-1);
 357                 }
 358         }
 359 
 360         err = zcmd_read_dst_nvlist(zhp->zfs_hdl, &zc, &recvdprops);
 361         zcmd_free_nvlists(&zc);
 362         if (err != 0)
 363                 return (-1);
 364 
 365         nvlist_free(zhp->zfs_recvd_props);
 366         zhp->zfs_recvd_props = recvdprops;
 367 
 368         return (0);
 369 }
 370 
 371 static int
 372 put_stats_zhdl(zfs_handle_t *zhp, zfs_cmd_t *zc)
 373 {
 374         nvlist_t *allprops, *userprops;
 375 
 376         zhp->zfs_dmustats = zc->zc_objset_stats; /* structure assignment */
 377 
 378         if (zcmd_read_dst_nvlist(zhp->zfs_hdl, zc, &allprops) != 0) {
 379                 return (-1);
 380         }
 381 
 382         /*
 383          * XXX Why do we store the user props separately, in addition to
 384          * storing them in zfs_props?
 385          */
 386         if ((userprops = process_user_props(zhp, allprops)) == NULL) {
 387                 nvlist_free(allprops);
 388                 return (-1);
 389         }
 390 
 391         nvlist_free(zhp->zfs_props);
 392         nvlist_free(zhp->zfs_user_props);
 393 
 394         zhp->zfs_props = allprops;
 395         zhp->zfs_user_props = userprops;
 396 
 397         return (0);
 398 }
 399 
 400 static int
 401 get_stats(zfs_handle_t *zhp)
 402 {
 403         int rc = 0;
 404         zfs_cmd_t zc = { 0 };
 405 
 406         if (zcmd_alloc_dst_nvlist(zhp->zfs_hdl, &zc, 0) != 0)
 407                 return (-1);
 408         if (get_stats_ioctl(zhp, &zc) != 0)
 409                 rc = -1;
 410         else if (put_stats_zhdl(zhp, &zc) != 0)
 411                 rc = -1;
 412         zcmd_free_nvlists(&zc);
 413         return (rc);
 414 }
 415 
 416 /*
 417  * Refresh the properties currently stored in the handle.
 418  */
 419 void
 420 zfs_refresh_properties(zfs_handle_t *zhp)
 421 {
 422         (void) get_stats(zhp);
 423 }
 424 
 425 /*
 426  * Makes a handle from the given dataset name.  Used by zfs_open() and
 427  * zfs_iter_* to create child handles on the fly.
 428  */
 429 static int
 430 make_dataset_handle_common(zfs_handle_t *zhp, zfs_cmd_t *zc)
 431 {
 432         if (put_stats_zhdl(zhp, zc) != 0)
 433                 return (-1);
 434 
 435         /*
 436          * We've managed to open the dataset and gather statistics.  Determine
 437          * the high-level type.
 438          */
 439         if (zhp->zfs_dmustats.dds_type == DMU_OST_ZVOL)
 440                 zhp->zfs_head_type = ZFS_TYPE_VOLUME;
 441         else if (zhp->zfs_dmustats.dds_type == DMU_OST_ZFS)
 442                 zhp->zfs_head_type = ZFS_TYPE_FILESYSTEM;
 443         else
 444                 abort();
 445 
 446         if (zhp->zfs_dmustats.dds_is_snapshot)
 447                 zhp->zfs_type = ZFS_TYPE_SNAPSHOT;
 448         else if (zhp->zfs_dmustats.dds_type == DMU_OST_ZVOL)
 449                 zhp->zfs_type = ZFS_TYPE_VOLUME;
 450         else if (zhp->zfs_dmustats.dds_type == DMU_OST_ZFS)
 451                 zhp->zfs_type = ZFS_TYPE_FILESYSTEM;
 452         else
 453                 abort();        /* we should never see any other types */
 454 
 455         if ((zhp->zpool_hdl = zpool_handle(zhp)) == NULL)
 456                 return (-1);
 457 
 458         return (0);
 459 }
 460 
 461 zfs_handle_t *
 462 make_dataset_handle(libzfs_handle_t *hdl, const char *path)
 463 {
 464         zfs_cmd_t zc = { 0 };
 465 
 466         zfs_handle_t *zhp = calloc(sizeof (zfs_handle_t), 1);
 467 
 468         if (zhp == NULL)
 469                 return (NULL);
 470 
 471         zhp->zfs_hdl = hdl;
 472         (void) strlcpy(zhp->zfs_name, path, sizeof (zhp->zfs_name));
 473         if (zcmd_alloc_dst_nvlist(hdl, &zc, 0) != 0) {
 474                 free(zhp);
 475                 return (NULL);
 476         }
 477         if (get_stats_ioctl(zhp, &zc) == -1) {
 478                 zcmd_free_nvlists(&zc);
 479                 free(zhp);
 480                 return (NULL);
 481         }
 482         if (make_dataset_handle_common(zhp, &zc) == -1) {
 483                 free(zhp);
 484                 zhp = NULL;
 485         }
 486         zcmd_free_nvlists(&zc);
 487         return (zhp);
 488 }
 489 
 490 zfs_handle_t *
 491 make_dataset_handle_zc(libzfs_handle_t *hdl, zfs_cmd_t *zc)
 492 {
 493         zfs_handle_t *zhp = calloc(sizeof (zfs_handle_t), 1);
 494 
 495         if (zhp == NULL)
 496                 return (NULL);
 497 
 498         zhp->zfs_hdl = hdl;
 499         (void) strlcpy(zhp->zfs_name, zc->zc_name, sizeof (zhp->zfs_name));
 500         if (make_dataset_handle_common(zhp, zc) == -1) {
 501                 free(zhp);
 502                 return (NULL);
 503         }
 504         return (zhp);
 505 }
 506 
 507 zfs_handle_t *
 508 make_dataset_simple_handle_zc(zfs_handle_t *pzhp, zfs_cmd_t *zc)
 509 {
 510         zfs_handle_t *zhp = calloc(sizeof (zfs_handle_t), 1);
 511 
 512         if (zhp == NULL)
 513                 return (NULL);
 514 
 515         zhp->zfs_hdl = pzhp->zfs_hdl;
 516         (void) strlcpy(zhp->zfs_name, zc->zc_name, sizeof (zhp->zfs_name));
 517         zhp->zfs_head_type = pzhp->zfs_type;
 518         zhp->zfs_type = ZFS_TYPE_SNAPSHOT;
 519         zhp->zpool_hdl = zpool_handle(zhp);
 520         return (zhp);
 521 }
 522 
 523 zfs_handle_t *
 524 zfs_handle_dup(zfs_handle_t *zhp_orig)
 525 {
 526         zfs_handle_t *zhp = calloc(sizeof (zfs_handle_t), 1);
 527 
 528         if (zhp == NULL)
 529                 return (NULL);
 530 
 531         zhp->zfs_hdl = zhp_orig->zfs_hdl;
 532         zhp->zpool_hdl = zhp_orig->zpool_hdl;
 533         (void) strlcpy(zhp->zfs_name, zhp_orig->zfs_name,
 534             sizeof (zhp->zfs_name));
 535         zhp->zfs_type = zhp_orig->zfs_type;
 536         zhp->zfs_head_type = zhp_orig->zfs_head_type;
 537         zhp->zfs_dmustats = zhp_orig->zfs_dmustats;
 538         if (zhp_orig->zfs_props != NULL) {
 539                 if (nvlist_dup(zhp_orig->zfs_props, &zhp->zfs_props, 0) != 0) {
 540                         (void) no_memory(zhp->zfs_hdl);
 541                         zfs_close(zhp);
 542                         return (NULL);
 543                 }
 544         }
 545         if (zhp_orig->zfs_user_props != NULL) {
 546                 if (nvlist_dup(zhp_orig->zfs_user_props,
 547                     &zhp->zfs_user_props, 0) != 0) {
 548                         (void) no_memory(zhp->zfs_hdl);
 549                         zfs_close(zhp);
 550                         return (NULL);
 551                 }
 552         }
 553         if (zhp_orig->zfs_recvd_props != NULL) {
 554                 if (nvlist_dup(zhp_orig->zfs_recvd_props,
 555                     &zhp->zfs_recvd_props, 0)) {
 556                         (void) no_memory(zhp->zfs_hdl);
 557                         zfs_close(zhp);
 558                         return (NULL);
 559                 }
 560         }
 561         zhp->zfs_mntcheck = zhp_orig->zfs_mntcheck;
 562         if (zhp_orig->zfs_mntopts != NULL) {
 563                 zhp->zfs_mntopts = zfs_strdup(zhp_orig->zfs_hdl,
 564                     zhp_orig->zfs_mntopts);
 565         }
 566         zhp->zfs_props_table = zhp_orig->zfs_props_table;
 567         return (zhp);
 568 }
 569 
 570 boolean_t
 571 zfs_bookmark_exists(const char *path)
 572 {
 573         nvlist_t *bmarks;
 574         nvlist_t *props;
 575         char fsname[ZFS_MAX_DATASET_NAME_LEN];
 576         char *bmark_name;
 577         char *pound;
 578         int err;
 579         boolean_t rv;
 580 
 581 
 582         (void) strlcpy(fsname, path, sizeof (fsname));
 583         pound = strchr(fsname, '#');
 584         if (pound == NULL)
 585                 return (B_FALSE);
 586 
 587         *pound = '\0';
 588         bmark_name = pound + 1;
 589         props = fnvlist_alloc();
 590         err = lzc_get_bookmarks(fsname, props, &bmarks);
 591         nvlist_free(props);
 592         if (err != 0) {
 593                 nvlist_free(bmarks);
 594                 return (B_FALSE);
 595         }
 596 
 597         rv = nvlist_exists(bmarks, bmark_name);
 598         nvlist_free(bmarks);
 599         return (rv);
 600 }
 601 
 602 zfs_handle_t *
 603 make_bookmark_handle(zfs_handle_t *parent, const char *path,
 604     nvlist_t *bmark_props)
 605 {
 606         zfs_handle_t *zhp = calloc(sizeof (zfs_handle_t), 1);
 607 
 608         if (zhp == NULL)
 609                 return (NULL);
 610 
 611         /* Fill in the name. */
 612         zhp->zfs_hdl = parent->zfs_hdl;
 613         (void) strlcpy(zhp->zfs_name, path, sizeof (zhp->zfs_name));
 614 
 615         /* Set the property lists. */
 616         if (nvlist_dup(bmark_props, &zhp->zfs_props, 0) != 0) {
 617                 free(zhp);
 618                 return (NULL);
 619         }
 620 
 621         /* Set the types. */
 622         zhp->zfs_head_type = parent->zfs_head_type;
 623         zhp->zfs_type = ZFS_TYPE_BOOKMARK;
 624 
 625         if ((zhp->zpool_hdl = zpool_handle(zhp)) == NULL) {
 626                 nvlist_free(zhp->zfs_props);
 627                 free(zhp);
 628                 return (NULL);
 629         }
 630 
 631         return (zhp);
 632 }
 633 
 634 struct zfs_open_bookmarks_cb_data {
 635         const char *path;
 636         zfs_handle_t *zhp;
 637 };
 638 
 639 static int
 640 zfs_open_bookmarks_cb(zfs_handle_t *zhp, void *data)
 641 {
 642         struct zfs_open_bookmarks_cb_data *dp = data;
 643 
 644         /*
 645          * Is it the one we are looking for?
 646          */
 647         if (strcmp(dp->path, zfs_get_name(zhp)) == 0) {
 648                 /*
 649                  * We found it.  Save it and let the caller know we are done.
 650                  */
 651                 dp->zhp = zhp;
 652                 return (EEXIST);
 653         }
 654 
 655         /*
 656          * Not found.  Close the handle and ask for another one.
 657          */
 658         zfs_close(zhp);
 659         return (0);
 660 }
 661 
 662 /*
 663  * Opens the given snapshot, bookmark, filesystem, or volume.   The 'types'
 664  * argument is a mask of acceptable types.  The function will print an
 665  * appropriate error message and return NULL if it can't be opened.
 666  */
 667 zfs_handle_t *
 668 zfs_open(libzfs_handle_t *hdl, const char *path, int types)
 669 {
 670         zfs_handle_t *zhp;
 671         char errbuf[1024];
 672         char *bookp;
 673 
 674         (void) snprintf(errbuf, sizeof (errbuf),
 675             dgettext(TEXT_DOMAIN, "cannot open '%s'"), path);
 676 
 677         /*
 678          * Validate the name before we even try to open it.
 679          */
 680         if (!zfs_validate_name(hdl, path, types, B_FALSE)) {
 681                 (void) zfs_error(hdl, EZFS_INVALIDNAME, errbuf);
 682                 return (NULL);
 683         }
 684 
 685         /*
 686          * Bookmarks needs to be handled separately.
 687          */
 688         bookp = strchr(path, '#');
 689         if (bookp == NULL) {
 690                 /*
 691                  * Try to get stats for the dataset, which will tell us if it
 692                  * exists.
 693                  */
 694                 errno = 0;
 695                 if ((zhp = make_dataset_handle(hdl, path)) == NULL) {
 696                         (void) zfs_standard_error(hdl, errno, errbuf);
 697                         return (NULL);
 698                 }
 699         } else {
 700                 char dsname[ZFS_MAX_DATASET_NAME_LEN];
 701                 zfs_handle_t *pzhp;
 702                 struct zfs_open_bookmarks_cb_data cb_data = {path, NULL};
 703 
 704                 /*
 705                  * We need to cut out '#' and everything after '#'
 706                  * to get the parent dataset name only.
 707                  */
 708                 assert(bookp - path < sizeof (dsname));
 709                 (void) strncpy(dsname, path, bookp - path);
 710                 dsname[bookp - path] = '\0';
 711 
 712                 /*
 713                  * Create handle for the parent dataset.
 714                  */
 715                 errno = 0;
 716                 if ((pzhp = make_dataset_handle(hdl, dsname)) == NULL) {
 717                         (void) zfs_standard_error(hdl, errno, errbuf);
 718                         return (NULL);
 719                 }
 720 
 721                 /*
 722                  * Iterate bookmarks to find the right one.
 723                  */
 724                 errno = 0;
 725                 if ((zfs_iter_bookmarks(pzhp, zfs_open_bookmarks_cb,
 726                     &cb_data) == 0) && (cb_data.zhp == NULL)) {
 727                         (void) zfs_error(hdl, EZFS_NOENT, errbuf);
 728                         zfs_close(pzhp);
 729                         return (NULL);
 730                 }
 731                 if (cb_data.zhp == NULL) {
 732                         (void) zfs_standard_error(hdl, errno, errbuf);
 733                         zfs_close(pzhp);
 734                         return (NULL);
 735                 }
 736                 zhp = cb_data.zhp;
 737 
 738                 /*
 739                  * Cleanup.
 740                  */
 741                 zfs_close(pzhp);
 742         }
 743 
 744         if (!(types & zhp->zfs_type)) {
 745                 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf);
 746                 zfs_close(zhp);
 747                 return (NULL);
 748         }
 749 
 750         return (zhp);
 751 }
 752 
 753 /*
 754  * Release a ZFS handle.  Nothing to do but free the associated memory.
 755  */
 756 void
 757 zfs_close(zfs_handle_t *zhp)
 758 {
 759         if (zhp->zfs_mntopts)
 760                 free(zhp->zfs_mntopts);
 761         nvlist_free(zhp->zfs_props);
 762         nvlist_free(zhp->zfs_user_props);
 763         nvlist_free(zhp->zfs_recvd_props);
 764         free(zhp);
 765 }
 766 
 767 typedef struct mnttab_node {
 768         struct mnttab mtn_mt;
 769         avl_node_t mtn_node;
 770 } mnttab_node_t;
 771 
 772 static int
 773 libzfs_mnttab_cache_compare(const void *arg1, const void *arg2)
 774 {
 775         const mnttab_node_t *mtn1 = arg1;
 776         const mnttab_node_t *mtn2 = arg2;
 777         int rv;
 778 
 779         rv = strcmp(mtn1->mtn_mt.mnt_special, mtn2->mtn_mt.mnt_special);
 780 
 781         if (rv == 0)
 782                 return (0);
 783         return (rv > 0 ? 1 : -1);
 784 }
 785 
 786 void
 787 libzfs_mnttab_init(libzfs_handle_t *hdl)
 788 {
 789         (void) mutex_init(&hdl->libzfs_mnttab_cache_lock, USYNC_THREAD, NULL);
 790         assert(avl_numnodes(&hdl->libzfs_mnttab_cache) == 0);
 791         avl_create(&hdl->libzfs_mnttab_cache, libzfs_mnttab_cache_compare,
 792             sizeof (mnttab_node_t), offsetof(mnttab_node_t, mtn_node));
 793 }
 794 
 795 void
 796 libzfs_mnttab_update(libzfs_handle_t *hdl)
 797 {
 798         struct mnttab entry;
 799 
 800         rewind(hdl->libzfs_mnttab);
 801         while (getmntent(hdl->libzfs_mnttab, &entry) == 0) {
 802                 mnttab_node_t *mtn;
 803 
 804                 if (strcmp(entry.mnt_fstype, MNTTYPE_ZFS) != 0)
 805                         continue;
 806                 mtn = zfs_alloc(hdl, sizeof (mnttab_node_t));
 807                 mtn->mtn_mt.mnt_special = zfs_strdup(hdl, entry.mnt_special);
 808                 mtn->mtn_mt.mnt_mountp = zfs_strdup(hdl, entry.mnt_mountp);
 809                 mtn->mtn_mt.mnt_fstype = zfs_strdup(hdl, entry.mnt_fstype);
 810                 mtn->mtn_mt.mnt_mntopts = zfs_strdup(hdl, entry.mnt_mntopts);
 811                 avl_add(&hdl->libzfs_mnttab_cache, mtn);
 812         }
 813 }
 814 
 815 void
 816 libzfs_mnttab_fini(libzfs_handle_t *hdl)
 817 {
 818         void *cookie = NULL;
 819         mnttab_node_t *mtn;
 820 
 821         while ((mtn = avl_destroy_nodes(&hdl->libzfs_mnttab_cache, &cookie))
 822             != NULL) {
 823                 free(mtn->mtn_mt.mnt_special);
 824                 free(mtn->mtn_mt.mnt_mountp);
 825                 free(mtn->mtn_mt.mnt_fstype);
 826                 free(mtn->mtn_mt.mnt_mntopts);
 827                 free(mtn);
 828         }
 829         avl_destroy(&hdl->libzfs_mnttab_cache);
 830         (void) mutex_destroy(&hdl->libzfs_mnttab_cache_lock);
 831 }
 832 
 833 void
 834 libzfs_mnttab_cache(libzfs_handle_t *hdl, boolean_t enable)
 835 {
 836         hdl->libzfs_mnttab_enable = enable;
 837 }
 838 
 839 int
 840 libzfs_mnttab_find(libzfs_handle_t *hdl, const char *fsname,
 841     struct mnttab *entry)
 842 {
 843         mnttab_node_t find;
 844         mnttab_node_t *mtn;
 845         int ret = ENOENT;
 846 
 847         if (!hdl->libzfs_mnttab_enable) {
 848                 struct mnttab srch = { 0 };
 849 
 850                 if (avl_numnodes(&hdl->libzfs_mnttab_cache))
 851                         libzfs_mnttab_fini(hdl);
 852                 rewind(hdl->libzfs_mnttab);
 853                 srch.mnt_special = (char *)fsname;
 854                 srch.mnt_fstype = MNTTYPE_ZFS;
 855                 if (getmntany(hdl->libzfs_mnttab, entry, &srch) == 0)
 856                         ret = 0;
 857                 return (ret);

 858         }
 859 
 860         (void) mutex_lock(&hdl->libzfs_mnttab_cache_lock);
 861         if (avl_numnodes(&hdl->libzfs_mnttab_cache) == 0)
 862                 libzfs_mnttab_update(hdl);
 863 
 864         find.mtn_mt.mnt_special = (char *)fsname;
 865         mtn = avl_find(&hdl->libzfs_mnttab_cache, &find, NULL);
 866         if (mtn) {
 867                 *entry = mtn->mtn_mt;
 868                 ret = 0;
 869         }
 870         (void) mutex_unlock(&hdl->libzfs_mnttab_cache_lock);
 871         return (ret);
 872 }
 873 
 874 void
 875 libzfs_mnttab_add(libzfs_handle_t *hdl, const char *special,
 876     const char *mountp, const char *mntopts)
 877 {
 878         mnttab_node_t *mtn;
 879 
 880         (void) mutex_lock(&hdl->libzfs_mnttab_cache_lock);
 881         if (avl_numnodes(&hdl->libzfs_mnttab_cache) != 0) {
 882                 mtn = zfs_alloc(hdl, sizeof (mnttab_node_t));
 883                 mtn->mtn_mt.mnt_special = zfs_strdup(hdl, special);
 884                 mtn->mtn_mt.mnt_mountp = zfs_strdup(hdl, mountp);
 885                 mtn->mtn_mt.mnt_fstype = zfs_strdup(hdl, MNTTYPE_ZFS);
 886                 mtn->mtn_mt.mnt_mntopts = zfs_strdup(hdl, mntopts);
 887                 avl_add(&hdl->libzfs_mnttab_cache, mtn);
 888         }
 889         (void) mutex_unlock(&hdl->libzfs_mnttab_cache_lock);
 890 }
 891 
 892 void
 893 libzfs_mnttab_remove(libzfs_handle_t *hdl, const char *fsname)
 894 {
 895         mnttab_node_t find;
 896         mnttab_node_t *ret;
 897 
 898         (void) mutex_lock(&hdl->libzfs_mnttab_cache_lock);
 899         find.mtn_mt.mnt_special = (char *)fsname;
 900         if ((ret = avl_find(&hdl->libzfs_mnttab_cache, (void *)&find, NULL))
 901             != NULL) {
 902                 avl_remove(&hdl->libzfs_mnttab_cache, ret);
 903                 free(ret->mtn_mt.mnt_special);
 904                 free(ret->mtn_mt.mnt_mountp);
 905                 free(ret->mtn_mt.mnt_fstype);
 906                 free(ret->mtn_mt.mnt_mntopts);
 907                 free(ret);
 908         }
 909         (void) mutex_unlock(&hdl->libzfs_mnttab_cache_lock);
 910 }
 911 
 912 int
 913 zfs_spa_version(zfs_handle_t *zhp, int *spa_version)
 914 {
 915         zpool_handle_t *zpool_handle = zhp->zpool_hdl;
 916 
 917         if (zpool_handle == NULL)
 918                 return (-1);
 919 
 920         *spa_version = zpool_get_prop_int(zpool_handle,
 921             ZPOOL_PROP_VERSION, NULL);
 922         return (0);
 923 }
 924 
 925 /*
 926  * The choice of reservation property depends on the SPA version.
 927  */
 928 static int
 929 zfs_which_resv_prop(zfs_handle_t *zhp, zfs_prop_t *resv_prop)
 930 {
 931         int spa_version;
 932 
 933         if (zfs_spa_version(zhp, &spa_version) < 0)
 934                 return (-1);
 935 
 936         if (spa_version >= SPA_VERSION_REFRESERVATION)
 937                 *resv_prop = ZFS_PROP_REFRESERVATION;
 938         else
 939                 *resv_prop = ZFS_PROP_RESERVATION;
 940 
 941         return (0);
 942 }
 943 
 944 /*
 945  * Given an nvlist of properties to set, validates that they are correct, and
 946  * parses any numeric properties (index, boolean, etc) if they are specified as
 947  * strings.
 948  */
 949 nvlist_t *
 950 zfs_valid_proplist(libzfs_handle_t *hdl, zfs_type_t type, nvlist_t *nvl,
 951     uint64_t zoned, zfs_handle_t *zhp, zpool_handle_t *zpool_hdl,
 952     const char *errbuf)
 953 {
 954         nvpair_t *elem;
 955         uint64_t intval;
 956         char *strval;
 957         zfs_prop_t prop;
 958         nvlist_t *ret;
 959         int chosen_normal = -1;
 960         int chosen_utf = -1;
 961 
 962         if (nvlist_alloc(&ret, NV_UNIQUE_NAME, 0) != 0) {
 963                 (void) no_memory(hdl);
 964                 return (NULL);
 965         }
 966 
 967         /*
 968          * Make sure this property is valid and applies to this type.
 969          */
 970 
 971         elem = NULL;
 972         while ((elem = nvlist_next_nvpair(nvl, elem)) != NULL) {
 973                 const char *propname = nvpair_name(elem);
 974 
 975                 prop = zfs_name_to_prop(propname);
 976                 if (prop == ZPROP_INVAL && zfs_prop_user(propname)) {
 977                         /*
 978                          * This is a user property: make sure it's a
 979                          * string, and that it's less than ZAP_MAXNAMELEN.
 980                          */
 981                         if (nvpair_type(elem) != DATA_TYPE_STRING) {
 982                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 983                                     "'%s' must be a string"), propname);
 984                                 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
 985                                 goto error;
 986                         }
 987 
 988                         if (strlen(nvpair_name(elem)) >= ZAP_MAXNAMELEN) {
 989                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
 990                                     "property name '%s' is too long"),
 991                                     propname);
 992                                 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
 993                                 goto error;
 994                         }
 995 
 996                         (void) nvpair_value_string(elem, &strval);
 997                         if (nvlist_add_string(ret, propname, strval) != 0) {
 998                                 (void) no_memory(hdl);
 999                                 goto error;
1000                         }
1001                         continue;
1002                 }
1003 
1004                 /*
1005                  * Currently, only user properties can be modified on
1006                  * snapshots.
1007                  */
1008                 if (type == ZFS_TYPE_SNAPSHOT) {
1009                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1010                             "this property can not be modified for snapshots"));
1011                         (void) zfs_error(hdl, EZFS_PROPTYPE, errbuf);
1012                         goto error;
1013                 }
1014 
1015                 if (prop == ZPROP_INVAL && zfs_prop_userquota(propname)) {
1016                         zfs_userquota_prop_t uqtype;
1017                         char newpropname[128];
1018                         char domain[128];
1019                         uint64_t rid;
1020                         uint64_t valary[3];
1021 
1022                         if (userquota_propname_decode(propname, zoned,
1023                             &uqtype, domain, sizeof (domain), &rid) != 0) {
1024                                 zfs_error_aux(hdl,
1025                                     dgettext(TEXT_DOMAIN,
1026                                     "'%s' has an invalid user/group name"),
1027                                     propname);
1028                                 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1029                                 goto error;
1030                         }
1031 
1032                         if (uqtype != ZFS_PROP_USERQUOTA &&
1033                             uqtype != ZFS_PROP_GROUPQUOTA) {
1034                                 zfs_error_aux(hdl,
1035                                     dgettext(TEXT_DOMAIN, "'%s' is readonly"),
1036                                     propname);
1037                                 (void) zfs_error(hdl, EZFS_PROPREADONLY,
1038                                     errbuf);
1039                                 goto error;
1040                         }
1041 
1042                         if (nvpair_type(elem) == DATA_TYPE_STRING) {
1043                                 (void) nvpair_value_string(elem, &strval);
1044                                 if (strcmp(strval, "none") == 0) {
1045                                         intval = 0;
1046                                 } else if (zfs_nicestrtonum(hdl,
1047                                     strval, &intval) != 0) {
1048                                         (void) zfs_error(hdl,
1049                                             EZFS_BADPROP, errbuf);
1050                                         goto error;
1051                                 }
1052                         } else if (nvpair_type(elem) ==
1053                             DATA_TYPE_UINT64) {
1054                                 (void) nvpair_value_uint64(elem, &intval);
1055                                 if (intval == 0) {
1056                                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1057                                             "use 'none' to disable "
1058                                             "userquota/groupquota"));
1059                                         goto error;
1060                                 }
1061                         } else {
1062                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1063                                     "'%s' must be a number"), propname);
1064                                 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1065                                 goto error;
1066                         }
1067 
1068                         /*
1069                          * Encode the prop name as
1070                          * userquota@<hex-rid>-domain, to make it easy
1071                          * for the kernel to decode.
1072                          */
1073                         (void) snprintf(newpropname, sizeof (newpropname),
1074                             "%s%llx-%s", zfs_userquota_prop_prefixes[uqtype],
1075                             (longlong_t)rid, domain);
1076                         valary[0] = uqtype;
1077                         valary[1] = rid;
1078                         valary[2] = intval;
1079                         if (nvlist_add_uint64_array(ret, newpropname,
1080                             valary, 3) != 0) {
1081                                 (void) no_memory(hdl);
1082                                 goto error;
1083                         }
1084                         continue;
1085                 } else if (prop == ZPROP_INVAL && zfs_prop_written(propname)) {
1086                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1087                             "'%s' is readonly"),
1088                             propname);
1089                         (void) zfs_error(hdl, EZFS_PROPREADONLY, errbuf);
1090                         goto error;
1091                 }
1092 
1093                 if (prop == ZPROP_INVAL) {
1094                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1095                             "invalid property '%s'"), propname);
1096                         (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1097                         goto error;
1098                 }
1099 
1100                 if (!zfs_prop_valid_for_type(prop, type)) {
1101                         zfs_error_aux(hdl,
1102                             dgettext(TEXT_DOMAIN, "'%s' does not "
1103                             "apply to datasets of this type"), propname);
1104                         (void) zfs_error(hdl, EZFS_PROPTYPE, errbuf);
1105                         goto error;
1106                 }
1107 
1108                 if (zfs_prop_readonly(prop) &&
1109                     (!zfs_prop_setonce(prop) || zhp != NULL)) {
1110                         zfs_error_aux(hdl,
1111                             dgettext(TEXT_DOMAIN, "'%s' is readonly"),
1112                             propname);
1113                         (void) zfs_error(hdl, EZFS_PROPREADONLY, errbuf);
1114                         goto error;
1115                 }
1116 
1117                 if (zprop_parse_value(hdl, elem, prop, type, ret,
1118                     &strval, &intval, errbuf) != 0)
1119                         goto error;
1120 
1121                 /*
1122                  * Perform some additional checks for specific properties.
1123                  */
1124                 switch (prop) {
1125                 case ZFS_PROP_VERSION:
1126                 {
1127                         int version;
1128 
1129                         if (zhp == NULL)
1130                                 break;
1131                         version = zfs_prop_get_int(zhp, ZFS_PROP_VERSION);
1132                         if (intval < version) {
1133                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1134                                     "Can not downgrade; already at version %u"),
1135                                     version);
1136                                 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1137                                 goto error;
1138                         }
1139                         break;
1140                 }
1141 
1142                 case ZFS_PROP_VOLBLOCKSIZE:
1143                 case ZFS_PROP_RECORDSIZE:
1144                 {
1145                         int maxbs = SPA_MAXBLOCKSIZE;
1146                         if (zpool_hdl != NULL) {
1147                                 maxbs = zpool_get_prop_int(zpool_hdl,
1148                                     ZPOOL_PROP_MAXBLOCKSIZE, NULL);
1149                         }
1150                         /*
1151                          * Volumes are limited to a volblocksize of 128KB,
1152                          * because they typically service workloads with
1153                          * small random writes, which incur a large performance
1154                          * penalty with large blocks.
1155                          */
1156                         if (prop == ZFS_PROP_VOLBLOCKSIZE)
1157                                 maxbs = SPA_OLD_MAXBLOCKSIZE;
1158                         /*
1159                          * The value must be a power of two between
1160                          * SPA_MINBLOCKSIZE and maxbs.
1161                          */
1162                         if (intval < SPA_MINBLOCKSIZE ||
1163                             intval > maxbs || !ISP2(intval)) {
1164                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1165                                     "'%s' must be power of 2 from 512B "
1166                                     "to %uKB"), propname, maxbs >> 10);
1167                                 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1168                                 goto error;
1169                         }
1170                         break;
1171                 }
1172                 case ZFS_PROP_MLSLABEL:
1173                 {
1174                         /*
1175                          * Verify the mlslabel string and convert to
1176                          * internal hex label string.
1177                          */
1178 
1179                         m_label_t *new_sl;
1180                         char *hex = NULL;       /* internal label string */
1181 
1182                         /* Default value is already OK. */
1183                         if (strcasecmp(strval, ZFS_MLSLABEL_DEFAULT) == 0)
1184                                 break;
1185 
1186                         /* Verify the label can be converted to binary form */
1187                         if (((new_sl = m_label_alloc(MAC_LABEL)) == NULL) ||
1188                             (str_to_label(strval, &new_sl, MAC_LABEL,
1189                             L_NO_CORRECTION, NULL) == -1)) {
1190                                 goto badlabel;
1191                         }
1192 
1193                         /* Now translate to hex internal label string */
1194                         if (label_to_str(new_sl, &hex, M_INTERNAL,
1195                             DEF_NAMES) != 0) {
1196                                 if (hex)
1197                                         free(hex);
1198                                 goto badlabel;
1199                         }
1200                         m_label_free(new_sl);
1201 
1202                         /* If string is already in internal form, we're done. */
1203                         if (strcmp(strval, hex) == 0) {
1204                                 free(hex);
1205                                 break;
1206                         }
1207 
1208                         /* Replace the label string with the internal form. */
1209                         (void) nvlist_remove(ret, zfs_prop_to_name(prop),
1210                             DATA_TYPE_STRING);
1211                         verify(nvlist_add_string(ret, zfs_prop_to_name(prop),
1212                             hex) == 0);
1213                         free(hex);
1214 
1215                         break;
1216 
1217 badlabel:
1218                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1219                             "invalid mlslabel '%s'"), strval);
1220                         (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1221                         m_label_free(new_sl);   /* OK if null */
1222                         goto error;
1223 
1224                 }
1225 
1226                 case ZFS_PROP_MOUNTPOINT:
1227                 {
1228                         namecheck_err_t why;
1229 
1230                         if (strcmp(strval, ZFS_MOUNTPOINT_NONE) == 0 ||
1231                             strcmp(strval, ZFS_MOUNTPOINT_LEGACY) == 0)
1232                                 break;
1233 
1234                         if (mountpoint_namecheck(strval, &why)) {
1235                                 switch (why) {
1236                                 case NAME_ERR_LEADING_SLASH:
1237                                         zfs_error_aux(hdl,
1238                                             dgettext(TEXT_DOMAIN,
1239                                             "'%s' must be an absolute path, "
1240                                             "'none', or 'legacy'"), propname);
1241                                         break;
1242                                 case NAME_ERR_TOOLONG:
1243                                         zfs_error_aux(hdl,
1244                                             dgettext(TEXT_DOMAIN,
1245                                             "component of '%s' is too long"),
1246                                             propname);
1247                                         break;
1248 
1249                                 default:
1250                                         zfs_error_aux(hdl,
1251                                             dgettext(TEXT_DOMAIN,
1252                                             "(%d) not defined"),
1253                                             why);
1254                                         break;
1255                                 }
1256                                 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1257                                 goto error;
1258                         }
1259                 }
1260 
1261                         /*FALLTHRU*/
1262 
1263                 case ZFS_PROP_SHARESMB:
1264                 case ZFS_PROP_SHARENFS:
1265                         /*
1266                          * For the mountpoint and sharenfs or sharesmb
1267                          * properties, check if it can be set in a
1268                          * global/non-global zone based on
1269                          * the zoned property value:
1270                          *
1271                          *              global zone         non-global zone
1272                          * --------------------------------------------------
1273                          * zoned=on     mountpoint (no)     mountpoint (yes)
1274                          *              sharenfs (no)       sharenfs (no)
1275                          *              sharesmb (no)       sharesmb (no)
1276                          *
1277                          * zoned=off    mountpoint (yes)        N/A
1278                          *              sharenfs (yes)
1279                          *              sharesmb (yes)
1280                          */
1281                         if (zoned) {
1282                                 if (getzoneid() == GLOBAL_ZONEID) {
1283                                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1284                                             "'%s' cannot be set on "
1285                                             "dataset in a non-global zone"),
1286                                             propname);
1287                                         (void) zfs_error(hdl, EZFS_ZONED,
1288                                             errbuf);
1289                                         goto error;
1290                                 } else if (prop == ZFS_PROP_SHARENFS ||
1291                                     prop == ZFS_PROP_SHARESMB) {
1292                                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1293                                             "'%s' cannot be set in "
1294                                             "a non-global zone"), propname);
1295                                         (void) zfs_error(hdl, EZFS_ZONED,
1296                                             errbuf);
1297                                         goto error;
1298                                 }
1299                         } else if (getzoneid() != GLOBAL_ZONEID) {
1300                                 /*
1301                                  * If zoned property is 'off', this must be in
1302                                  * a global zone. If not, something is wrong.
1303                                  */
1304                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1305                                     "'%s' cannot be set while dataset "
1306                                     "'zoned' property is set"), propname);
1307                                 (void) zfs_error(hdl, EZFS_ZONED, errbuf);
1308                                 goto error;
1309                         }
1310 
1311                         /*
1312                          * At this point, it is legitimate to set the
1313                          * property. Now we want to make sure that the
1314                          * property value is valid if it is sharenfs.
1315                          */
1316                         if ((prop == ZFS_PROP_SHARENFS ||
1317                             prop == ZFS_PROP_SHARESMB) &&
1318                             strcmp(strval, "on") != 0 &&
1319                             strcmp(strval, "off") != 0) {
1320                                 zfs_share_proto_t proto;
1321 
1322                                 if (prop == ZFS_PROP_SHARESMB)
1323                                         proto = PROTO_SMB;
1324                                 else
1325                                         proto = PROTO_NFS;
1326 
1327                                 /*
1328                                  * Must be an valid sharing protocol
1329                                  * option string so init the libshare
1330                                  * in order to enable the parser and
1331                                  * then parse the options. We use the
1332                                  * control API since we don't care about
1333                                  * the current configuration and don't
1334                                  * want the overhead of loading it
1335                                  * until we actually do something.
1336                                  */
1337 
1338                                 if (zfs_init_libshare(hdl,
1339                                     SA_INIT_CONTROL_API) != SA_OK) {
1340                                         /*
1341                                          * An error occurred so we can't do
1342                                          * anything
1343                                          */
1344                                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1345                                             "'%s' cannot be set: problem "
1346                                             "in share initialization"),
1347                                             propname);
1348                                         (void) zfs_error(hdl, EZFS_BADPROP,
1349                                             errbuf);
1350                                         goto error;
1351                                 }
1352 
1353                                 if (zfs_parse_options(strval, proto) != SA_OK) {
1354                                         /*
1355                                          * There was an error in parsing so
1356                                          * deal with it by issuing an error
1357                                          * message and leaving after
1358                                          * uninitializing the the libshare
1359                                          * interface.
1360                                          */
1361                                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1362                                             "'%s' cannot be set to invalid "
1363                                             "options"), propname);
1364                                         (void) zfs_error(hdl, EZFS_BADPROP,
1365                                             errbuf);
1366                                         zfs_uninit_libshare(hdl);
1367                                         goto error;
1368                                 }
1369                                 zfs_uninit_libshare(hdl);
1370                         }
1371 
1372                         break;
1373 
1374                 case ZFS_PROP_UTF8ONLY:
1375                         chosen_utf = (int)intval;
1376                         break;
1377 
1378                 case ZFS_PROP_NORMALIZE:
1379                         chosen_normal = (int)intval;
1380                         break;
1381 
1382                 default:
1383                         break;
1384                 }
1385 
1386                 /*
1387                  * For changes to existing volumes, we have some additional
1388                  * checks to enforce.
1389                  */
1390                 if (type == ZFS_TYPE_VOLUME && zhp != NULL) {
1391                         uint64_t volsize = zfs_prop_get_int(zhp,
1392                             ZFS_PROP_VOLSIZE);
1393                         uint64_t blocksize = zfs_prop_get_int(zhp,
1394                             ZFS_PROP_VOLBLOCKSIZE);
1395                         char buf[64];
1396 
1397                         switch (prop) {
1398                         case ZFS_PROP_RESERVATION:
1399                         case ZFS_PROP_REFRESERVATION:
1400                                 if (intval > volsize) {
1401                                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1402                                             "'%s' is greater than current "
1403                                             "volume size"), propname);
1404                                         (void) zfs_error(hdl, EZFS_BADPROP,
1405                                             errbuf);
1406                                         goto error;
1407                                 }
1408                                 break;
1409 
1410                         case ZFS_PROP_VOLSIZE:
1411                                 if (intval % blocksize != 0) {
1412                                         zfs_nicenum(blocksize, buf,
1413                                             sizeof (buf));
1414                                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1415                                             "'%s' must be a multiple of "
1416                                             "volume block size (%s)"),
1417                                             propname, buf);
1418                                         (void) zfs_error(hdl, EZFS_BADPROP,
1419                                             errbuf);
1420                                         goto error;
1421                                 }
1422 
1423                                 if (intval == 0) {
1424                                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1425                                             "'%s' cannot be zero"),
1426                                             propname);
1427                                         (void) zfs_error(hdl, EZFS_BADPROP,
1428                                             errbuf);
1429                                         goto error;
1430                                 }
1431                                 break;
1432 
1433                         default:
1434                                 break;
1435                         }
1436                 }
1437         }
1438 
1439         /*
1440          * If normalization was chosen, but no UTF8 choice was made,
1441          * enforce rejection of non-UTF8 names.
1442          *
1443          * If normalization was chosen, but rejecting non-UTF8 names
1444          * was explicitly not chosen, it is an error.
1445          */
1446         if (chosen_normal > 0 && chosen_utf < 0) {
1447                 if (nvlist_add_uint64(ret,
1448                     zfs_prop_to_name(ZFS_PROP_UTF8ONLY), 1) != 0) {
1449                         (void) no_memory(hdl);
1450                         goto error;
1451                 }
1452         } else if (chosen_normal > 0 && chosen_utf == 0) {
1453                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1454                     "'%s' must be set 'on' if normalization chosen"),
1455                     zfs_prop_to_name(ZFS_PROP_UTF8ONLY));
1456                 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1457                 goto error;
1458         }
1459         return (ret);
1460 
1461 error:
1462         nvlist_free(ret);
1463         return (NULL);
1464 }
1465 
1466 int
1467 zfs_add_synthetic_resv(zfs_handle_t *zhp, nvlist_t *nvl)
1468 {
1469         uint64_t old_volsize;
1470         uint64_t new_volsize;
1471         uint64_t old_reservation;
1472         uint64_t new_reservation;
1473         zfs_prop_t resv_prop;
1474         nvlist_t *props;
1475 
1476         /*
1477          * If this is an existing volume, and someone is setting the volsize,
1478          * make sure that it matches the reservation, or add it if necessary.
1479          */
1480         old_volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE);
1481         if (zfs_which_resv_prop(zhp, &resv_prop) < 0)
1482                 return (-1);
1483         old_reservation = zfs_prop_get_int(zhp, resv_prop);
1484 
1485         props = fnvlist_alloc();
1486         fnvlist_add_uint64(props, zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE),
1487             zfs_prop_get_int(zhp, ZFS_PROP_VOLBLOCKSIZE));
1488 
1489         if ((zvol_volsize_to_reservation(old_volsize, props) !=
1490             old_reservation) || nvlist_exists(nvl,
1491             zfs_prop_to_name(resv_prop))) {
1492                 fnvlist_free(props);
1493                 return (0);
1494         }
1495         if (nvlist_lookup_uint64(nvl, zfs_prop_to_name(ZFS_PROP_VOLSIZE),
1496             &new_volsize) != 0) {
1497                 fnvlist_free(props);
1498                 return (-1);
1499         }
1500         new_reservation = zvol_volsize_to_reservation(new_volsize, props);
1501         fnvlist_free(props);
1502 
1503         if (nvlist_add_uint64(nvl, zfs_prop_to_name(resv_prop),
1504             new_reservation) != 0) {
1505                 (void) no_memory(zhp->zfs_hdl);
1506                 return (-1);
1507         }
1508         return (1);
1509 }
1510 
1511 void
1512 zfs_setprop_error(libzfs_handle_t *hdl, zfs_prop_t prop, int err,
1513     char *errbuf)
1514 {
1515         switch (err) {
1516 
1517         case ENOSPC:
1518                 /*
1519                  * For quotas and reservations, ENOSPC indicates
1520                  * something different; setting a quota or reservation
1521                  * doesn't use any disk space.
1522                  */
1523                 switch (prop) {
1524                 case ZFS_PROP_QUOTA:
1525                 case ZFS_PROP_REFQUOTA:
1526                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1527                             "size is less than current used or "
1528                             "reserved space"));
1529                         (void) zfs_error(hdl, EZFS_PROPSPACE, errbuf);
1530                         break;
1531 
1532                 case ZFS_PROP_RESERVATION:
1533                 case ZFS_PROP_REFRESERVATION:
1534                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1535                             "size is greater than available space"));
1536                         (void) zfs_error(hdl, EZFS_PROPSPACE, errbuf);
1537                         break;
1538 
1539                 default:
1540                         (void) zfs_standard_error(hdl, err, errbuf);
1541                         break;
1542                 }
1543                 break;
1544 
1545         case EBUSY:
1546                 (void) zfs_standard_error(hdl, EBUSY, errbuf);
1547                 break;
1548 
1549         case EROFS:
1550                 (void) zfs_error(hdl, EZFS_DSREADONLY, errbuf);
1551                 break;
1552 
1553         case E2BIG:
1554                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1555                     "property value too long"));
1556                 (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1557                 break;
1558 
1559         case ENOTSUP:
1560                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1561                     "pool and or dataset must be upgraded to set this "
1562                     "property or value"));
1563                 (void) zfs_error(hdl, EZFS_BADVERSION, errbuf);
1564                 break;
1565 
1566         case ERANGE:
1567                 if (prop == ZFS_PROP_COMPRESSION ||
1568                     prop == ZFS_PROP_RECORDSIZE) {
1569                         (void) zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1570                             "property setting is not allowed on "
1571                             "bootable datasets"));
1572                         (void) zfs_error(hdl, EZFS_NOTSUP, errbuf);
1573                 } else if (prop == ZFS_PROP_CHECKSUM ||
1574                     prop == ZFS_PROP_DEDUP) {
1575                         (void) zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1576                             "property setting is not allowed on "
1577                             "root pools"));
1578                         (void) zfs_error(hdl, EZFS_NOTSUP, errbuf);
1579                 } else {
1580                         (void) zfs_standard_error(hdl, err, errbuf);
1581                 }
1582                 break;
1583 
1584         case EINVAL:
1585                 if (prop == ZPROP_INVAL) {
1586                         (void) zfs_error(hdl, EZFS_BADPROP, errbuf);
1587                 } else {
1588                         (void) zfs_standard_error(hdl, err, errbuf);
1589                 }
1590                 break;
1591 
1592         case EOVERFLOW:
1593                 /*
1594                  * This platform can't address a volume this big.
1595                  */
1596 #ifdef _ILP32
1597                 if (prop == ZFS_PROP_VOLSIZE) {
1598                         (void) zfs_error(hdl, EZFS_VOLTOOBIG, errbuf);
1599                         break;
1600                 }
1601 #endif
1602                 /* FALLTHROUGH */
1603         default:
1604                 (void) zfs_standard_error(hdl, err, errbuf);
1605         }
1606 }
1607 
1608 /*
1609  * Given a property name and value, set the property for the given dataset.
1610  */
1611 int
1612 zfs_prop_set(zfs_handle_t *zhp, const char *propname, const char *propval)
1613 {
1614         int ret = -1;
1615         char errbuf[1024];
1616         libzfs_handle_t *hdl = zhp->zfs_hdl;
1617         nvlist_t *nvl = NULL;
1618 
1619         (void) snprintf(errbuf, sizeof (errbuf),
1620             dgettext(TEXT_DOMAIN, "cannot set property for '%s'"),
1621             zhp->zfs_name);
1622 
1623         if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0) != 0 ||
1624             nvlist_add_string(nvl, propname, propval) != 0) {
1625                 (void) no_memory(hdl);
1626                 goto error;
1627         }
1628 
1629         ret = zfs_prop_set_list(zhp, nvl);
1630 
1631 error:
1632         nvlist_free(nvl);
1633         return (ret);
1634 }
1635 
1636 
1637 
1638 /*
1639  * Given an nvlist of property names and values, set the properties for the
1640  * given dataset.
1641  */
1642 int
1643 zfs_prop_set_list(zfs_handle_t *zhp, nvlist_t *props)
1644 {
1645         zfs_cmd_t zc = { 0 };
1646         int ret = -1;
1647         prop_changelist_t **cls = NULL;
1648         int cl_idx;
1649         char errbuf[1024];
1650         libzfs_handle_t *hdl = zhp->zfs_hdl;
1651         nvlist_t *nvl;
1652         int nvl_len;
1653         int added_resv = 0;
1654 
1655         (void) snprintf(errbuf, sizeof (errbuf),
1656             dgettext(TEXT_DOMAIN, "cannot set property for '%s'"),
1657             zhp->zfs_name);
1658 
1659         if ((nvl = zfs_valid_proplist(hdl, zhp->zfs_type, props,
1660             zfs_prop_get_int(zhp, ZFS_PROP_ZONED), zhp, zhp->zpool_hdl,
1661             errbuf)) == NULL)
1662                 goto error;
1663 
1664         /*
1665          * We have to check for any extra properties which need to be added
1666          * before computing the length of the nvlist.
1667          */
1668         for (nvpair_t *elem = nvlist_next_nvpair(nvl, NULL);
1669             elem != NULL;
1670             elem = nvlist_next_nvpair(nvl, elem)) {
1671                 if (zfs_name_to_prop(nvpair_name(elem)) == ZFS_PROP_VOLSIZE &&
1672                     (added_resv = zfs_add_synthetic_resv(zhp, nvl)) == -1) {
1673                         goto error;
1674                 }
1675         }
1676         /*
1677          * Check how many properties we're setting and allocate an array to
1678          * store changelist pointers for postfix().
1679          */
1680         nvl_len = 0;
1681         for (nvpair_t *elem = nvlist_next_nvpair(nvl, NULL);
1682             elem != NULL;
1683             elem = nvlist_next_nvpair(nvl, elem))
1684                 nvl_len++;
1685         if ((cls = calloc(nvl_len, sizeof (prop_changelist_t *))) == NULL)
1686                 goto error;
1687 
1688         cl_idx = 0;
1689         for (nvpair_t *elem = nvlist_next_nvpair(nvl, NULL);
1690             elem != NULL;
1691             elem = nvlist_next_nvpair(nvl, elem)) {
1692 
1693                 zfs_prop_t prop = zfs_name_to_prop(nvpair_name(elem));
1694 
1695                 assert(cl_idx < nvl_len);
1696                 /*
1697                  * We don't want to unmount & remount the dataset when changing
1698                  * its canmount property to 'on' or 'noauto'.  We only use
1699                  * the changelist logic to unmount when setting canmount=off.
1700                  */
1701                 if (prop != ZFS_PROP_CANMOUNT ||
1702                     (fnvpair_value_uint64(elem) == ZFS_CANMOUNT_OFF &&
1703                     zfs_is_mounted(zhp, NULL))) {
1704                         cls[cl_idx] = changelist_gather(zhp, prop, 0, 0);
1705                         if (cls[cl_idx] == NULL)
1706                                 goto error;
1707                 }
1708 
1709                 if (prop == ZFS_PROP_MOUNTPOINT &&
1710                     changelist_haszonedchild(cls[cl_idx])) {
1711                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1712                             "child dataset with inherited mountpoint is used "
1713                             "in a non-global zone"));
1714                         ret = zfs_error(hdl, EZFS_ZONED, errbuf);
1715                         goto error;
1716                 }
1717 
1718                 if (cls[cl_idx] != NULL &&
1719                     (ret = changelist_prefix(cls[cl_idx])) != 0)
1720                         goto error;
1721 
1722                 cl_idx++;
1723         }
1724         assert(cl_idx == nvl_len);
1725 
1726         /*
1727          * Execute the corresponding ioctl() to set this list of properties.
1728          */
1729         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
1730 
1731         if ((ret = zcmd_write_src_nvlist(hdl, &zc, nvl)) != 0 ||
1732             (ret = zcmd_alloc_dst_nvlist(hdl, &zc, 0)) != 0)
1733                 goto error;
1734 
1735         ret = zfs_ioctl(hdl, ZFS_IOC_SET_PROP, &zc);
1736 
1737         if (ret != 0) {
1738                 /* Get the list of unset properties back and report them. */
1739                 nvlist_t *errorprops = NULL;
1740                 if (zcmd_read_dst_nvlist(hdl, &zc, &errorprops) != 0)
1741                         goto error;
1742                 for (nvpair_t *elem = nvlist_next_nvpair(nvl, NULL);
1743                     elem != NULL;
1744                     elem = nvlist_next_nvpair(nvl, elem)) {
1745                         zfs_prop_t prop = zfs_name_to_prop(nvpair_name(elem));
1746                         zfs_setprop_error(hdl, prop, errno, errbuf);
1747                 }
1748                 nvlist_free(errorprops);
1749 
1750                 if (added_resv && errno == ENOSPC) {
1751                         /* clean up the volsize property we tried to set */
1752                         uint64_t old_volsize = zfs_prop_get_int(zhp,
1753                             ZFS_PROP_VOLSIZE);
1754                         nvlist_free(nvl);
1755                         nvl = NULL;
1756                         zcmd_free_nvlists(&zc);
1757 
1758                         if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0) != 0)
1759                                 goto error;
1760                         if (nvlist_add_uint64(nvl,
1761                             zfs_prop_to_name(ZFS_PROP_VOLSIZE),
1762                             old_volsize) != 0)
1763                                 goto error;
1764                         if (zcmd_write_src_nvlist(hdl, &zc, nvl) != 0)
1765                                 goto error;
1766                         (void) zfs_ioctl(hdl, ZFS_IOC_SET_PROP, &zc);
1767                 }
1768         } else {
1769                 for (cl_idx = 0; cl_idx < nvl_len; cl_idx++) {
1770                         if (cls[cl_idx] != NULL) {
1771                                 int clp_err = changelist_postfix(cls[cl_idx]);
1772                                 if (clp_err != 0)
1773                                         ret = clp_err;
1774                         }
1775                 }
1776 
1777                 /*
1778                  * Refresh the statistics so the new property value
1779                  * is reflected.
1780                  */
1781                 if (ret == 0)
1782                         (void) get_stats(zhp);
1783         }
1784 
1785 error:
1786         nvlist_free(nvl);
1787         zcmd_free_nvlists(&zc);
1788         if (cls != NULL) {
1789                 for (cl_idx = 0; cl_idx < nvl_len; cl_idx++) {
1790                         if (cls[cl_idx] != NULL)
1791                                 changelist_free(cls[cl_idx]);
1792                 }
1793                 free(cls);
1794         }
1795         return (ret);
1796 }
1797 
1798 /*
1799  * Given a property, inherit the value from the parent dataset, or if received
1800  * is TRUE, revert to the received value, if any.
1801  */
1802 int
1803 zfs_prop_inherit(zfs_handle_t *zhp, const char *propname, boolean_t received)
1804 {
1805         zfs_cmd_t zc = { 0 };
1806         int ret;
1807         prop_changelist_t *cl;
1808         libzfs_handle_t *hdl = zhp->zfs_hdl;
1809         char errbuf[1024];
1810         zfs_prop_t prop;
1811 
1812         (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
1813             "cannot inherit %s for '%s'"), propname, zhp->zfs_name);
1814 
1815         zc.zc_cookie = received;
1816         if ((prop = zfs_name_to_prop(propname)) == ZPROP_INVAL) {
1817                 /*
1818                  * For user properties, the amount of work we have to do is very
1819                  * small, so just do it here.
1820                  */
1821                 if (!zfs_prop_user(propname)) {
1822                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1823                             "invalid property"));
1824                         return (zfs_error(hdl, EZFS_BADPROP, errbuf));
1825                 }
1826 
1827                 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
1828                 (void) strlcpy(zc.zc_value, propname, sizeof (zc.zc_value));
1829 
1830                 if (zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_INHERIT_PROP, &zc) != 0)
1831                         return (zfs_standard_error(hdl, errno, errbuf));
1832 
1833                 return (0);
1834         }
1835 
1836         /*
1837          * Verify that this property is inheritable.
1838          */
1839         if (zfs_prop_readonly(prop))
1840                 return (zfs_error(hdl, EZFS_PROPREADONLY, errbuf));
1841 
1842         if (!zfs_prop_inheritable(prop) && !received)
1843                 return (zfs_error(hdl, EZFS_PROPNONINHERIT, errbuf));
1844 
1845         /*
1846          * Check to see if the value applies to this type
1847          */
1848         if (!zfs_prop_valid_for_type(prop, zhp->zfs_type))
1849                 return (zfs_error(hdl, EZFS_PROPTYPE, errbuf));
1850 
1851         /*
1852          * Normalize the name, to get rid of shorthand abbreviations.
1853          */
1854         propname = zfs_prop_to_name(prop);
1855         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
1856         (void) strlcpy(zc.zc_value, propname, sizeof (zc.zc_value));
1857 
1858         if (prop == ZFS_PROP_MOUNTPOINT && getzoneid() == GLOBAL_ZONEID &&
1859             zfs_prop_get_int(zhp, ZFS_PROP_ZONED)) {
1860                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1861                     "dataset is used in a non-global zone"));
1862                 return (zfs_error(hdl, EZFS_ZONED, errbuf));
1863         }
1864 
1865         /*
1866          * Determine datasets which will be affected by this change, if any.
1867          */
1868         if ((cl = changelist_gather(zhp, prop, 0, 0)) == NULL)
1869                 return (-1);
1870 
1871         if (prop == ZFS_PROP_MOUNTPOINT && changelist_haszonedchild(cl)) {
1872                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
1873                     "child dataset with inherited mountpoint is used "
1874                     "in a non-global zone"));
1875                 ret = zfs_error(hdl, EZFS_ZONED, errbuf);
1876                 goto error;
1877         }
1878 
1879         if ((ret = changelist_prefix(cl)) != 0)
1880                 goto error;
1881 
1882         if ((ret = zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_INHERIT_PROP, &zc)) != 0) {
1883                 return (zfs_standard_error(hdl, errno, errbuf));
1884         } else {
1885 
1886                 if ((ret = changelist_postfix(cl)) != 0)
1887                         goto error;
1888 
1889                 /*
1890                  * Refresh the statistics so the new property is reflected.
1891                  */
1892                 (void) get_stats(zhp);
1893         }
1894 
1895 error:
1896         changelist_free(cl);
1897         return (ret);
1898 }
1899 
1900 /*
1901  * True DSL properties are stored in an nvlist.  The following two functions
1902  * extract them appropriately.
1903  */
1904 static uint64_t
1905 getprop_uint64(zfs_handle_t *zhp, zfs_prop_t prop, char **source)
1906 {
1907         nvlist_t *nv;
1908         uint64_t value;
1909 
1910         *source = NULL;
1911         if (nvlist_lookup_nvlist(zhp->zfs_props,
1912             zfs_prop_to_name(prop), &nv) == 0) {
1913                 verify(nvlist_lookup_uint64(nv, ZPROP_VALUE, &value) == 0);
1914                 (void) nvlist_lookup_string(nv, ZPROP_SOURCE, source);
1915         } else {
1916                 verify(!zhp->zfs_props_table ||
1917                     zhp->zfs_props_table[prop] == B_TRUE);
1918                 value = zfs_prop_default_numeric(prop);
1919                 *source = "";
1920         }
1921 
1922         return (value);
1923 }
1924 
1925 static const char *
1926 getprop_string(zfs_handle_t *zhp, zfs_prop_t prop, char **source)
1927 {
1928         nvlist_t *nv;
1929         const char *value;
1930 
1931         *source = NULL;
1932         if (nvlist_lookup_nvlist(zhp->zfs_props,
1933             zfs_prop_to_name(prop), &nv) == 0) {
1934                 value = fnvlist_lookup_string(nv, ZPROP_VALUE);
1935                 (void) nvlist_lookup_string(nv, ZPROP_SOURCE, source);
1936         } else {
1937                 verify(!zhp->zfs_props_table ||
1938                     zhp->zfs_props_table[prop] == B_TRUE);
1939                 value = zfs_prop_default_string(prop);
1940                 *source = "";
1941         }
1942 
1943         return (value);
1944 }
1945 
1946 static boolean_t
1947 zfs_is_recvd_props_mode(zfs_handle_t *zhp)
1948 {
1949         return (zhp->zfs_props == zhp->zfs_recvd_props);
1950 }
1951 
1952 static void
1953 zfs_set_recvd_props_mode(zfs_handle_t *zhp, uint64_t *cookie)
1954 {
1955         *cookie = (uint64_t)(uintptr_t)zhp->zfs_props;
1956         zhp->zfs_props = zhp->zfs_recvd_props;
1957 }
1958 
1959 static void
1960 zfs_unset_recvd_props_mode(zfs_handle_t *zhp, uint64_t *cookie)
1961 {
1962         zhp->zfs_props = (nvlist_t *)(uintptr_t)*cookie;
1963         *cookie = 0;
1964 }
1965 
1966 /*
1967  * Internal function for getting a numeric property.  Both zfs_prop_get() and
1968  * zfs_prop_get_int() are built using this interface.
1969  *
1970  * Certain properties can be overridden using 'mount -o'.  In this case, scan
1971  * the contents of the /etc/mnttab entry, searching for the appropriate options.
1972  * If they differ from the on-disk values, report the current values and mark
1973  * the source "temporary".
1974  */
1975 static int
1976 get_numeric_property(zfs_handle_t *zhp, zfs_prop_t prop, zprop_source_t *src,
1977     char **source, uint64_t *val)
1978 {
1979         zfs_cmd_t zc = { 0 };
1980         nvlist_t *zplprops = NULL;
1981         struct mnttab mnt;
1982         char *mntopt_on = NULL;
1983         char *mntopt_off = NULL;
1984         boolean_t received = zfs_is_recvd_props_mode(zhp);
1985 
1986         *source = NULL;
1987 
1988         switch (prop) {
1989         case ZFS_PROP_ATIME:
1990                 mntopt_on = MNTOPT_ATIME;
1991                 mntopt_off = MNTOPT_NOATIME;
1992                 break;
1993 
1994         case ZFS_PROP_DEVICES:
1995                 mntopt_on = MNTOPT_DEVICES;
1996                 mntopt_off = MNTOPT_NODEVICES;
1997                 break;
1998 
1999         case ZFS_PROP_EXEC:
2000                 mntopt_on = MNTOPT_EXEC;
2001                 mntopt_off = MNTOPT_NOEXEC;
2002                 break;
2003 
2004         case ZFS_PROP_READONLY:
2005                 mntopt_on = MNTOPT_RO;
2006                 mntopt_off = MNTOPT_RW;
2007                 break;
2008 
2009         case ZFS_PROP_SETUID:
2010                 mntopt_on = MNTOPT_SETUID;
2011                 mntopt_off = MNTOPT_NOSETUID;
2012                 break;
2013 
2014         case ZFS_PROP_XATTR:
2015                 mntopt_on = MNTOPT_XATTR;
2016                 mntopt_off = MNTOPT_NOXATTR;
2017                 break;
2018 
2019         case ZFS_PROP_NBMAND:
2020                 mntopt_on = MNTOPT_NBMAND;
2021                 mntopt_off = MNTOPT_NONBMAND;
2022                 break;
2023 
2024         default:
2025                 break;
2026         }
2027 
2028         /*
2029          * Because looking up the mount options is potentially expensive
2030          * (iterating over all of /etc/mnttab), we defer its calculation until
2031          * we're looking up a property which requires its presence.
2032          */
2033         if (!zhp->zfs_mntcheck &&
2034             (mntopt_on != NULL || prop == ZFS_PROP_MOUNTED)) {
2035                 libzfs_handle_t *hdl = zhp->zfs_hdl;
2036                 struct mnttab entry;
2037 
2038                 if (libzfs_mnttab_find(hdl, zhp->zfs_name, &entry) == 0) {
2039                         zhp->zfs_mntopts = zfs_strdup(hdl,
2040                             entry.mnt_mntopts);
2041                         if (zhp->zfs_mntopts == NULL)
2042                                 return (-1);
2043                 }
2044 
2045                 zhp->zfs_mntcheck = B_TRUE;
2046         }
2047 
2048         if (zhp->zfs_mntopts == NULL)
2049                 mnt.mnt_mntopts = "";
2050         else
2051                 mnt.mnt_mntopts = zhp->zfs_mntopts;
2052 
2053         switch (prop) {
2054         case ZFS_PROP_ATIME:
2055         case ZFS_PROP_DEVICES:
2056         case ZFS_PROP_EXEC:
2057         case ZFS_PROP_READONLY:
2058         case ZFS_PROP_SETUID:
2059         case ZFS_PROP_XATTR:
2060         case ZFS_PROP_NBMAND:
2061                 *val = getprop_uint64(zhp, prop, source);
2062 
2063                 if (received)
2064                         break;
2065 
2066                 if (hasmntopt(&mnt, mntopt_on) && !*val) {
2067                         *val = B_TRUE;
2068                         if (src)
2069                                 *src = ZPROP_SRC_TEMPORARY;
2070                 } else if (hasmntopt(&mnt, mntopt_off) && *val) {
2071                         *val = B_FALSE;
2072                         if (src)
2073                                 *src = ZPROP_SRC_TEMPORARY;
2074                 }
2075                 break;
2076 
2077         case ZFS_PROP_CANMOUNT:
2078         case ZFS_PROP_VOLSIZE:
2079         case ZFS_PROP_QUOTA:
2080         case ZFS_PROP_REFQUOTA:
2081         case ZFS_PROP_RESERVATION:
2082         case ZFS_PROP_REFRESERVATION:
2083         case ZFS_PROP_FILESYSTEM_LIMIT:
2084         case ZFS_PROP_SNAPSHOT_LIMIT:
2085         case ZFS_PROP_FILESYSTEM_COUNT:
2086         case ZFS_PROP_SNAPSHOT_COUNT:
2087                 *val = getprop_uint64(zhp, prop, source);
2088 
2089                 if (*source == NULL) {
2090                         /* not default, must be local */
2091                         *source = zhp->zfs_name;
2092                 }
2093                 break;
2094 
2095         case ZFS_PROP_MOUNTED:
2096                 *val = (zhp->zfs_mntopts != NULL);
2097                 break;
2098 
2099         case ZFS_PROP_NUMCLONES:
2100                 *val = zhp->zfs_dmustats.dds_num_clones;
2101                 break;
2102 
2103         case ZFS_PROP_VERSION:
2104         case ZFS_PROP_NORMALIZE:
2105         case ZFS_PROP_UTF8ONLY:
2106         case ZFS_PROP_CASE:
2107                 if (!zfs_prop_valid_for_type(prop, zhp->zfs_head_type) ||
2108                     zcmd_alloc_dst_nvlist(zhp->zfs_hdl, &zc, 0) != 0)
2109                         return (-1);
2110                 (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
2111                 if (zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_OBJSET_ZPLPROPS, &zc)) {
2112                         zcmd_free_nvlists(&zc);
2113                         return (-1);
2114                 }
2115                 if (zcmd_read_dst_nvlist(zhp->zfs_hdl, &zc, &zplprops) != 0 ||
2116                     nvlist_lookup_uint64(zplprops, zfs_prop_to_name(prop),
2117                     val) != 0) {
2118                         zcmd_free_nvlists(&zc);
2119                         return (-1);
2120                 }
2121                 nvlist_free(zplprops);
2122                 zcmd_free_nvlists(&zc);
2123                 break;
2124 
2125         case ZFS_PROP_INCONSISTENT:
2126                 *val = zhp->zfs_dmustats.dds_inconsistent;
2127                 break;
2128 
2129         default:
2130                 switch (zfs_prop_get_type(prop)) {
2131                 case PROP_TYPE_NUMBER:
2132                 case PROP_TYPE_INDEX:
2133                         *val = getprop_uint64(zhp, prop, source);
2134                         /*
2135                          * If we tried to use a default value for a
2136                          * readonly property, it means that it was not
2137                          * present.  Note this only applies to "truly"
2138                          * readonly properties, not set-once properties
2139                          * like volblocksize.
2140                          */
2141                         if (zfs_prop_readonly(prop) &&
2142                             !zfs_prop_setonce(prop) &&
2143                             *source != NULL && (*source)[0] == '\0') {
2144                                 *source = NULL;
2145                                 return (-1);
2146                         }
2147                         break;
2148 
2149                 case PROP_TYPE_STRING:
2150                 default:
2151                         zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN,
2152                             "cannot get non-numeric property"));
2153                         return (zfs_error(zhp->zfs_hdl, EZFS_BADPROP,
2154                             dgettext(TEXT_DOMAIN, "internal error")));
2155                 }
2156         }
2157 
2158         return (0);
2159 }
2160 
2161 /*
2162  * Calculate the source type, given the raw source string.
2163  */
2164 static void
2165 get_source(zfs_handle_t *zhp, zprop_source_t *srctype, char *source,
2166     char *statbuf, size_t statlen)
2167 {
2168         if (statbuf == NULL || *srctype == ZPROP_SRC_TEMPORARY)
2169                 return;
2170 
2171         if (source == NULL) {
2172                 *srctype = ZPROP_SRC_NONE;
2173         } else if (source[0] == '\0') {
2174                 *srctype = ZPROP_SRC_DEFAULT;
2175         } else if (strstr(source, ZPROP_SOURCE_VAL_RECVD) != NULL) {
2176                 *srctype = ZPROP_SRC_RECEIVED;
2177         } else {
2178                 if (strcmp(source, zhp->zfs_name) == 0) {
2179                         *srctype = ZPROP_SRC_LOCAL;
2180                 } else {
2181                         (void) strlcpy(statbuf, source, statlen);
2182                         *srctype = ZPROP_SRC_INHERITED;
2183                 }
2184         }
2185 
2186 }
2187 
2188 int
2189 zfs_prop_get_recvd(zfs_handle_t *zhp, const char *propname, char *propbuf,
2190     size_t proplen, boolean_t literal)
2191 {
2192         zfs_prop_t prop;
2193         int err = 0;
2194 
2195         if (zhp->zfs_recvd_props == NULL)
2196                 if (get_recvd_props_ioctl(zhp) != 0)
2197                         return (-1);
2198 
2199         prop = zfs_name_to_prop(propname);
2200 
2201         if (prop != ZPROP_INVAL) {
2202                 uint64_t cookie;
2203                 if (!nvlist_exists(zhp->zfs_recvd_props, propname))
2204                         return (-1);
2205                 zfs_set_recvd_props_mode(zhp, &cookie);
2206                 err = zfs_prop_get(zhp, prop, propbuf, proplen,
2207                     NULL, NULL, 0, literal);
2208                 zfs_unset_recvd_props_mode(zhp, &cookie);
2209         } else {
2210                 nvlist_t *propval;
2211                 char *recvdval;
2212                 if (nvlist_lookup_nvlist(zhp->zfs_recvd_props,
2213                     propname, &propval) != 0)
2214                         return (-1);
2215                 verify(nvlist_lookup_string(propval, ZPROP_VALUE,
2216                     &recvdval) == 0);
2217                 (void) strlcpy(propbuf, recvdval, proplen);
2218         }
2219 
2220         return (err == 0 ? 0 : -1);
2221 }
2222 
2223 static int
2224 get_clones_string(zfs_handle_t *zhp, char *propbuf, size_t proplen)
2225 {
2226         nvlist_t *value;
2227         nvpair_t *pair;
2228 
2229         value = zfs_get_clones_nvl(zhp);
2230         if (value == NULL)
2231                 return (-1);
2232 
2233         propbuf[0] = '\0';
2234         for (pair = nvlist_next_nvpair(value, NULL); pair != NULL;
2235             pair = nvlist_next_nvpair(value, pair)) {
2236                 if (propbuf[0] != '\0')
2237                         (void) strlcat(propbuf, ",", proplen);
2238                 (void) strlcat(propbuf, nvpair_name(pair), proplen);
2239         }
2240 
2241         return (0);
2242 }
2243 
2244 struct get_clones_arg {
2245         uint64_t numclones;
2246         nvlist_t *value;
2247         const char *origin;
2248         char buf[ZFS_MAX_DATASET_NAME_LEN];
2249 };
2250 
2251 int
2252 get_clones_cb(zfs_handle_t *zhp, void *arg)
2253 {
2254         struct get_clones_arg *gca = arg;
2255 
2256         if (gca->numclones == 0) {
2257                 zfs_close(zhp);
2258                 return (0);
2259         }
2260 
2261         if (zfs_prop_get(zhp, ZFS_PROP_ORIGIN, gca->buf, sizeof (gca->buf),
2262             NULL, NULL, 0, B_TRUE) != 0)
2263                 goto out;
2264         if (strcmp(gca->buf, gca->origin) == 0) {
2265                 fnvlist_add_boolean(gca->value, zfs_get_name(zhp));
2266                 gca->numclones--;
2267         }
2268 
2269 out:
2270         (void) zfs_iter_children(zhp, get_clones_cb, gca);
2271         zfs_close(zhp);
2272         return (0);
2273 }
2274 
2275 nvlist_t *
2276 zfs_get_clones_nvl(zfs_handle_t *zhp)
2277 {
2278         nvlist_t *nv, *value;
2279 
2280         if (nvlist_lookup_nvlist(zhp->zfs_props,
2281             zfs_prop_to_name(ZFS_PROP_CLONES), &nv) != 0) {
2282                 struct get_clones_arg gca;
2283 
2284                 /*
2285                  * if this is a snapshot, then the kernel wasn't able
2286                  * to get the clones.  Do it by slowly iterating.
2287                  */
2288                 if (zhp->zfs_type != ZFS_TYPE_SNAPSHOT)
2289                         return (NULL);
2290                 if (nvlist_alloc(&nv, NV_UNIQUE_NAME, 0) != 0)
2291                         return (NULL);
2292                 if (nvlist_alloc(&value, NV_UNIQUE_NAME, 0) != 0) {
2293                         nvlist_free(nv);
2294                         return (NULL);
2295                 }
2296 
2297                 gca.numclones = zfs_prop_get_int(zhp, ZFS_PROP_NUMCLONES);
2298                 gca.value = value;
2299                 gca.origin = zhp->zfs_name;
2300 
2301                 if (gca.numclones != 0) {
2302                         zfs_handle_t *root;
2303                         char pool[ZFS_MAX_DATASET_NAME_LEN];
2304                         char *cp = pool;
2305 
2306                         /* get the pool name */
2307                         (void) strlcpy(pool, zhp->zfs_name, sizeof (pool));
2308                         (void) strsep(&cp, "/@");
2309                         root = zfs_open(zhp->zfs_hdl, pool,
2310                             ZFS_TYPE_FILESYSTEM);
2311 
2312                         (void) get_clones_cb(root, &gca);
2313                 }
2314 
2315                 if (gca.numclones != 0 ||
2316                     nvlist_add_nvlist(nv, ZPROP_VALUE, value) != 0 ||
2317                     nvlist_add_nvlist(zhp->zfs_props,
2318                     zfs_prop_to_name(ZFS_PROP_CLONES), nv) != 0) {
2319                         nvlist_free(nv);
2320                         nvlist_free(value);
2321                         return (NULL);
2322                 }
2323                 nvlist_free(nv);
2324                 nvlist_free(value);
2325                 verify(0 == nvlist_lookup_nvlist(zhp->zfs_props,
2326                     zfs_prop_to_name(ZFS_PROP_CLONES), &nv));
2327         }
2328 
2329         verify(nvlist_lookup_nvlist(nv, ZPROP_VALUE, &value) == 0);
2330 
2331         return (value);
2332 }
2333 
2334 /*
2335  * Accepts a property and value and checks that the value
2336  * matches the one found by the channel program. If they are
2337  * not equal, print both of them.
2338  */
2339 void
2340 zcp_check(zfs_handle_t *zhp, zfs_prop_t prop, uint64_t intval,
2341     const char *strval)
2342 {
2343         if (!zhp->zfs_hdl->libzfs_prop_debug)
2344                 return;
2345         int error;
2346         char *poolname = zhp->zpool_hdl->zpool_name;
2347         const char *program =
2348             "args = ...\n"
2349             "ds = args['dataset']\n"
2350             "prop = args['property']\n"
2351             "value, setpoint = zfs.get_prop(ds, prop)\n"
2352             "return {value=value, setpoint=setpoint}\n";
2353         nvlist_t *outnvl;
2354         nvlist_t *retnvl;
2355         nvlist_t *argnvl = fnvlist_alloc();
2356 
2357         fnvlist_add_string(argnvl, "dataset", zhp->zfs_name);
2358         fnvlist_add_string(argnvl, "property", zfs_prop_to_name(prop));
2359 
2360         error = lzc_channel_program(poolname, program,
2361             10 * 1000 * 1000, 10 * 1024 * 1024, argnvl, &outnvl);
2362 
2363         if (error == 0) {
2364                 retnvl = fnvlist_lookup_nvlist(outnvl, "return");
2365                 if (zfs_prop_get_type(prop) == PROP_TYPE_NUMBER) {
2366                         int64_t ans;
2367                         error = nvlist_lookup_int64(retnvl, "value", &ans);
2368                         if (error != 0) {
2369                                 (void) fprintf(stderr, "zcp check error: %u\n",
2370                                     error);
2371                                 return;
2372                         }
2373                         if (ans != intval) {
2374                                 (void) fprintf(stderr,
2375                                     "%s: zfs found %lld, but zcp found %lld\n",
2376                                     zfs_prop_to_name(prop),
2377                                     (longlong_t)intval, (longlong_t)ans);
2378                         }
2379                 } else {
2380                         char *str_ans;
2381                         error = nvlist_lookup_string(retnvl, "value", &str_ans);
2382                         if (error != 0) {
2383                                 (void) fprintf(stderr, "zcp check error: %u\n",
2384                                     error);
2385                                 return;
2386                         }
2387                         if (strcmp(strval, str_ans) != 0) {
2388                                 (void) fprintf(stderr,
2389                                     "%s: zfs found %s, but zcp found %s\n",
2390                                     zfs_prop_to_name(prop),
2391                                     strval, str_ans);
2392                         }
2393                 }
2394         } else {
2395                 (void) fprintf(stderr,
2396                     "zcp check failed, channel program error: %u\n", error);
2397         }
2398         nvlist_free(argnvl);
2399         nvlist_free(outnvl);
2400 }
2401 
2402 /*
2403  * Retrieve a property from the given object.  If 'literal' is specified, then
2404  * numbers are left as exact values.  Otherwise, numbers are converted to a
2405  * human-readable form.
2406  *
2407  * Returns 0 on success, or -1 on error.
2408  */
2409 int
2410 zfs_prop_get(zfs_handle_t *zhp, zfs_prop_t prop, char *propbuf, size_t proplen,
2411     zprop_source_t *src, char *statbuf, size_t statlen, boolean_t literal)
2412 {
2413         char *source = NULL;
2414         uint64_t val;
2415         const char *str;
2416         const char *strval;
2417         boolean_t received = zfs_is_recvd_props_mode(zhp);
2418 
2419         /*
2420          * Check to see if this property applies to our object
2421          */
2422         if (!zfs_prop_valid_for_type(prop, zhp->zfs_type))
2423                 return (-1);
2424 
2425         if (received && zfs_prop_readonly(prop))
2426                 return (-1);
2427 
2428         if (src)
2429                 *src = ZPROP_SRC_NONE;
2430 
2431         switch (prop) {
2432         case ZFS_PROP_CREATION:
2433                 /*
2434                  * 'creation' is a time_t stored in the statistics.  We convert
2435                  * this into a string unless 'literal' is specified.
2436                  */
2437                 {
2438                         val = getprop_uint64(zhp, prop, &source);
2439                         time_t time = (time_t)val;
2440                         struct tm t;
2441 
2442                         if (literal ||
2443                             localtime_r(&time, &t) == NULL ||
2444                             strftime(propbuf, proplen, "%a %b %e %k:%M %Y",
2445                             &t) == 0)
2446                                 (void) snprintf(propbuf, proplen, "%llu", val);
2447                 }
2448                 zcp_check(zhp, prop, val, NULL);
2449                 break;
2450 
2451         case ZFS_PROP_MOUNTPOINT:
2452                 /*
2453                  * Getting the precise mountpoint can be tricky.
2454                  *
2455                  *  - for 'none' or 'legacy', return those values.
2456                  *  - for inherited mountpoints, we want to take everything
2457                  *    after our ancestor and append it to the inherited value.
2458                  *
2459                  * If the pool has an alternate root, we want to prepend that
2460                  * root to any values we return.
2461                  */
2462 
2463                 str = getprop_string(zhp, prop, &source);
2464 
2465                 if (str[0] == '/') {
2466                         char buf[MAXPATHLEN];
2467                         char *root = buf;
2468                         const char *relpath;
2469 
2470                         /*
2471                          * If we inherit the mountpoint, even from a dataset
2472                          * with a received value, the source will be the path of
2473                          * the dataset we inherit from. If source is
2474                          * ZPROP_SOURCE_VAL_RECVD, the received value is not
2475                          * inherited.
2476                          */
2477                         if (strcmp(source, ZPROP_SOURCE_VAL_RECVD) == 0) {
2478                                 relpath = "";
2479                         } else {
2480                                 relpath = zhp->zfs_name + strlen(source);
2481                                 if (relpath[0] == '/')
2482                                         relpath++;
2483                         }
2484 
2485                         if ((zpool_get_prop(zhp->zpool_hdl,
2486                             ZPOOL_PROP_ALTROOT, buf, MAXPATHLEN, NULL,
2487                             B_FALSE)) || (strcmp(root, "-") == 0))
2488                                 root[0] = '\0';
2489                         /*
2490                          * Special case an alternate root of '/'. This will
2491                          * avoid having multiple leading slashes in the
2492                          * mountpoint path.
2493                          */
2494                         if (strcmp(root, "/") == 0)
2495                                 root++;
2496 
2497                         /*
2498                          * If the mountpoint is '/' then skip over this
2499                          * if we are obtaining either an alternate root or
2500                          * an inherited mountpoint.
2501                          */
2502                         if (str[1] == '\0' && (root[0] != '\0' ||
2503                             relpath[0] != '\0'))
2504                                 str++;
2505 
2506                         if (relpath[0] == '\0')
2507                                 (void) snprintf(propbuf, proplen, "%s%s",
2508                                     root, str);
2509                         else
2510                                 (void) snprintf(propbuf, proplen, "%s%s%s%s",
2511                                     root, str, relpath[0] == '@' ? "" : "/",
2512                                     relpath);
2513                 } else {
2514                         /* 'legacy' or 'none' */
2515                         (void) strlcpy(propbuf, str, proplen);
2516                 }
2517                 zcp_check(zhp, prop, NULL, propbuf);
2518                 break;
2519 
2520         case ZFS_PROP_ORIGIN:
2521                 str = getprop_string(zhp, prop, &source);
2522                 if (str == NULL)
2523                         return (-1);
2524                 (void) strlcpy(propbuf, str, proplen);
2525                 zcp_check(zhp, prop, NULL, str);
2526                 break;
2527 
2528         case ZFS_PROP_CLONES:
2529                 if (get_clones_string(zhp, propbuf, proplen) != 0)
2530                         return (-1);
2531                 break;
2532 
2533         case ZFS_PROP_QUOTA:
2534         case ZFS_PROP_REFQUOTA:
2535         case ZFS_PROP_RESERVATION:
2536         case ZFS_PROP_REFRESERVATION:
2537 
2538                 if (get_numeric_property(zhp, prop, src, &source, &val) != 0)
2539                         return (-1);
2540                 /*
2541                  * If quota or reservation is 0, we translate this into 'none'
2542                  * (unless literal is set), and indicate that it's the default
2543                  * value.  Otherwise, we print the number nicely and indicate
2544                  * that its set locally.
2545                  */
2546                 if (val == 0) {
2547                         if (literal)
2548                                 (void) strlcpy(propbuf, "0", proplen);
2549                         else
2550                                 (void) strlcpy(propbuf, "none", proplen);
2551                 } else {
2552                         if (literal)
2553                                 (void) snprintf(propbuf, proplen, "%llu",
2554                                     (u_longlong_t)val);
2555                         else
2556                                 zfs_nicenum(val, propbuf, proplen);
2557                 }
2558                 zcp_check(zhp, prop, val, NULL);
2559                 break;
2560 
2561         case ZFS_PROP_FILESYSTEM_LIMIT:
2562         case ZFS_PROP_SNAPSHOT_LIMIT:
2563         case ZFS_PROP_FILESYSTEM_COUNT:
2564         case ZFS_PROP_SNAPSHOT_COUNT:
2565 
2566                 if (get_numeric_property(zhp, prop, src, &source, &val) != 0)
2567                         return (-1);
2568 
2569                 /*
2570                  * If limit is UINT64_MAX, we translate this into 'none' (unless
2571                  * literal is set), and indicate that it's the default value.
2572                  * Otherwise, we print the number nicely and indicate that it's
2573                  * set locally.
2574                  */
2575                 if (literal) {
2576                         (void) snprintf(propbuf, proplen, "%llu",
2577                             (u_longlong_t)val);
2578                 } else if (val == UINT64_MAX) {
2579                         (void) strlcpy(propbuf, "none", proplen);
2580                 } else {
2581                         zfs_nicenum(val, propbuf, proplen);
2582                 }
2583 
2584                 zcp_check(zhp, prop, val, NULL);
2585                 break;
2586 
2587         case ZFS_PROP_REFRATIO:
2588         case ZFS_PROP_COMPRESSRATIO:
2589                 if (get_numeric_property(zhp, prop, src, &source, &val) != 0)
2590                         return (-1);
2591                 (void) snprintf(propbuf, proplen, "%llu.%02llux",
2592                     (u_longlong_t)(val / 100),
2593                     (u_longlong_t)(val % 100));
2594                 zcp_check(zhp, prop, val, NULL);
2595                 break;
2596 
2597         case ZFS_PROP_TYPE:
2598                 switch (zhp->zfs_type) {
2599                 case ZFS_TYPE_FILESYSTEM:
2600                         str = "filesystem";
2601                         break;
2602                 case ZFS_TYPE_VOLUME:
2603                         str = "volume";
2604                         break;
2605                 case ZFS_TYPE_SNAPSHOT:
2606                         str = "snapshot";
2607                         break;
2608                 case ZFS_TYPE_BOOKMARK:
2609                         str = "bookmark";
2610                         break;
2611                 default:
2612                         abort();
2613                 }
2614                 (void) snprintf(propbuf, proplen, "%s", str);
2615                 zcp_check(zhp, prop, NULL, propbuf);
2616                 break;
2617 
2618         case ZFS_PROP_MOUNTED:
2619                 /*
2620                  * The 'mounted' property is a pseudo-property that described
2621                  * whether the filesystem is currently mounted.  Even though
2622                  * it's a boolean value, the typical values of "on" and "off"
2623                  * don't make sense, so we translate to "yes" and "no".
2624                  */
2625                 if (get_numeric_property(zhp, ZFS_PROP_MOUNTED,
2626                     src, &source, &val) != 0)
2627                         return (-1);
2628                 if (val)
2629                         (void) strlcpy(propbuf, "yes", proplen);
2630                 else
2631                         (void) strlcpy(propbuf, "no", proplen);
2632                 break;
2633 
2634         case ZFS_PROP_NAME:
2635                 /*
2636                  * The 'name' property is a pseudo-property derived from the
2637                  * dataset name.  It is presented as a real property to simplify
2638                  * consumers.
2639                  */
2640                 (void) strlcpy(propbuf, zhp->zfs_name, proplen);
2641                 zcp_check(zhp, prop, NULL, propbuf);
2642                 break;
2643 
2644         case ZFS_PROP_MLSLABEL:
2645                 {
2646                         m_label_t *new_sl = NULL;
2647                         char *ascii = NULL;     /* human readable label */
2648 
2649                         (void) strlcpy(propbuf,
2650                             getprop_string(zhp, prop, &source), proplen);
2651 
2652                         if (literal || (strcasecmp(propbuf,
2653                             ZFS_MLSLABEL_DEFAULT) == 0))
2654                                 break;
2655 
2656                         /*
2657                          * Try to translate the internal hex string to
2658                          * human-readable output.  If there are any
2659                          * problems just use the hex string.
2660                          */
2661 
2662                         if (str_to_label(propbuf, &new_sl, MAC_LABEL,
2663                             L_NO_CORRECTION, NULL) == -1) {
2664                                 m_label_free(new_sl);
2665                                 break;
2666                         }
2667 
2668                         if (label_to_str(new_sl, &ascii, M_LABEL,
2669                             DEF_NAMES) != 0) {
2670                                 if (ascii)
2671                                         free(ascii);
2672                                 m_label_free(new_sl);
2673                                 break;
2674                         }
2675                         m_label_free(new_sl);
2676 
2677                         (void) strlcpy(propbuf, ascii, proplen);
2678                         free(ascii);
2679                 }
2680                 break;
2681 
2682         case ZFS_PROP_GUID:
2683                 /*
2684                  * GUIDs are stored as numbers, but they are identifiers.
2685                  * We don't want them to be pretty printed, because pretty
2686                  * printing mangles the ID into a truncated and useless value.
2687                  */
2688                 if (get_numeric_property(zhp, prop, src, &source, &val) != 0)
2689                         return (-1);
2690                 (void) snprintf(propbuf, proplen, "%llu", (u_longlong_t)val);
2691                 zcp_check(zhp, prop, val, NULL);
2692                 break;
2693 
2694         default:
2695                 switch (zfs_prop_get_type(prop)) {
2696                 case PROP_TYPE_NUMBER:
2697                         if (get_numeric_property(zhp, prop, src,
2698                             &source, &val) != 0) {
2699                                 return (-1);
2700                         }
2701 
2702                         if (literal) {
2703                                 (void) snprintf(propbuf, proplen, "%llu",
2704                                     (u_longlong_t)val);
2705                         } else {
2706                                 zfs_nicenum(val, propbuf, proplen);
2707                         }
2708                         zcp_check(zhp, prop, val, NULL);
2709                         break;
2710 
2711                 case PROP_TYPE_STRING:
2712                         str = getprop_string(zhp, prop, &source);
2713                         if (str == NULL)
2714                                 return (-1);
2715 
2716                         (void) strlcpy(propbuf, str, proplen);
2717                         zcp_check(zhp, prop, NULL, str);
2718                         break;
2719 
2720                 case PROP_TYPE_INDEX:
2721                         if (get_numeric_property(zhp, prop, src,
2722                             &source, &val) != 0)
2723                                 return (-1);
2724                         if (zfs_prop_index_to_string(prop, val, &strval) != 0)
2725                                 return (-1);
2726 
2727                         (void) strlcpy(propbuf, strval, proplen);
2728                         zcp_check(zhp, prop, NULL, strval);
2729                         break;
2730 
2731                 default:
2732                         abort();
2733                 }
2734         }
2735 
2736         get_source(zhp, src, source, statbuf, statlen);
2737 
2738         return (0);
2739 }
2740 
2741 /*
2742  * Utility function to get the given numeric property.  Does no validation that
2743  * the given property is the appropriate type; should only be used with
2744  * hard-coded property types.
2745  */
2746 uint64_t
2747 zfs_prop_get_int(zfs_handle_t *zhp, zfs_prop_t prop)
2748 {
2749         char *source;
2750         uint64_t val;
2751 
2752         (void) get_numeric_property(zhp, prop, NULL, &source, &val);
2753 
2754         return (val);
2755 }
2756 
2757 int
2758 zfs_prop_set_int(zfs_handle_t *zhp, zfs_prop_t prop, uint64_t val)
2759 {
2760         char buf[64];
2761 
2762         (void) snprintf(buf, sizeof (buf), "%llu", (longlong_t)val);
2763         return (zfs_prop_set(zhp, zfs_prop_to_name(prop), buf));
2764 }
2765 
2766 /*
2767  * Similar to zfs_prop_get(), but returns the value as an integer.
2768  */
2769 int
2770 zfs_prop_get_numeric(zfs_handle_t *zhp, zfs_prop_t prop, uint64_t *value,
2771     zprop_source_t *src, char *statbuf, size_t statlen)
2772 {
2773         char *source;
2774 
2775         /*
2776          * Check to see if this property applies to our object
2777          */
2778         if (!zfs_prop_valid_for_type(prop, zhp->zfs_type)) {
2779                 return (zfs_error_fmt(zhp->zfs_hdl, EZFS_PROPTYPE,
2780                     dgettext(TEXT_DOMAIN, "cannot get property '%s'"),
2781                     zfs_prop_to_name(prop)));
2782         }
2783 
2784         if (src)
2785                 *src = ZPROP_SRC_NONE;
2786 
2787         if (get_numeric_property(zhp, prop, src, &source, value) != 0)
2788                 return (-1);
2789 
2790         get_source(zhp, src, source, statbuf, statlen);
2791 
2792         return (0);
2793 }
2794 
2795 static int
2796 idmap_id_to_numeric_domain_rid(uid_t id, boolean_t isuser,
2797     char **domainp, idmap_rid_t *ridp)
2798 {
2799         idmap_get_handle_t *get_hdl = NULL;
2800         idmap_stat status;
2801         int err = EINVAL;
2802 
2803         if (idmap_get_create(&get_hdl) != IDMAP_SUCCESS)
2804                 goto out;
2805 
2806         if (isuser) {
2807                 err = idmap_get_sidbyuid(get_hdl, id,
2808                     IDMAP_REQ_FLG_USE_CACHE, domainp, ridp, &status);
2809         } else {
2810                 err = idmap_get_sidbygid(get_hdl, id,
2811                     IDMAP_REQ_FLG_USE_CACHE, domainp, ridp, &status);
2812         }
2813         if (err == IDMAP_SUCCESS &&
2814             idmap_get_mappings(get_hdl) == IDMAP_SUCCESS &&
2815             status == IDMAP_SUCCESS)
2816                 err = 0;
2817         else
2818                 err = EINVAL;
2819 out:
2820         if (get_hdl)
2821                 idmap_get_destroy(get_hdl);
2822         return (err);
2823 }
2824 
2825 /*
2826  * convert the propname into parameters needed by kernel
2827  * Eg: userquota@ahrens -> ZFS_PROP_USERQUOTA, "", 126829
2828  * Eg: userused@matt@domain -> ZFS_PROP_USERUSED, "S-1-123-456", 789
2829  */
2830 static int
2831 userquota_propname_decode(const char *propname, boolean_t zoned,
2832     zfs_userquota_prop_t *typep, char *domain, int domainlen, uint64_t *ridp)
2833 {
2834         zfs_userquota_prop_t type;
2835         char *cp, *end;
2836         char *numericsid = NULL;
2837         boolean_t isuser;
2838 
2839         domain[0] = '\0';
2840         *ridp = 0;
2841         /* Figure out the property type ({user|group}{quota|space}) */
2842         for (type = 0; type < ZFS_NUM_USERQUOTA_PROPS; type++) {
2843                 if (strncmp(propname, zfs_userquota_prop_prefixes[type],
2844                     strlen(zfs_userquota_prop_prefixes[type])) == 0)
2845                         break;
2846         }
2847         if (type == ZFS_NUM_USERQUOTA_PROPS)
2848                 return (EINVAL);
2849         *typep = type;
2850 
2851         isuser = (type == ZFS_PROP_USERQUOTA ||
2852             type == ZFS_PROP_USERUSED);
2853 
2854         cp = strchr(propname, '@') + 1;
2855 
2856         if (strchr(cp, '@')) {
2857                 /*
2858                  * It's a SID name (eg "user@domain") that needs to be
2859                  * turned into S-1-domainID-RID.
2860                  */
2861                 int flag = 0;
2862                 idmap_stat stat, map_stat;
2863                 uid_t pid;
2864                 idmap_rid_t rid;
2865                 idmap_get_handle_t *gh = NULL;
2866 
2867                 stat = idmap_get_create(&gh);
2868                 if (stat != IDMAP_SUCCESS) {
2869                         idmap_get_destroy(gh);
2870                         return (ENOMEM);
2871                 }
2872                 if (zoned && getzoneid() == GLOBAL_ZONEID)
2873                         return (ENOENT);
2874                 if (isuser) {
2875                         stat = idmap_getuidbywinname(cp, NULL, flag, &pid);
2876                         if (stat < 0)
2877                                 return (ENOENT);
2878                         stat = idmap_get_sidbyuid(gh, pid, flag, &numericsid,
2879                             &rid, &map_stat);
2880                 } else {
2881                         stat = idmap_getgidbywinname(cp, NULL, flag, &pid);
2882                         if (stat < 0)
2883                                 return (ENOENT);
2884                         stat = idmap_get_sidbygid(gh, pid, flag, &numericsid,
2885                             &rid, &map_stat);
2886                 }
2887                 if (stat < 0) {
2888                         idmap_get_destroy(gh);
2889                         return (ENOENT);
2890                 }
2891                 stat = idmap_get_mappings(gh);
2892                 idmap_get_destroy(gh);
2893 
2894                 if (stat < 0) {
2895                         return (ENOENT);
2896                 }
2897                 if (numericsid == NULL)
2898                         return (ENOENT);
2899                 cp = numericsid;
2900                 *ridp = rid;
2901                 /* will be further decoded below */
2902         }
2903 
2904         if (strncmp(cp, "S-1-", 4) == 0) {
2905                 /* It's a numeric SID (eg "S-1-234-567-89") */
2906                 (void) strlcpy(domain, cp, domainlen);
2907                 errno = 0;
2908                 if (*ridp == 0) {
2909                         cp = strrchr(domain, '-');
2910                         *cp = '\0';
2911                         cp++;
2912                         *ridp = strtoull(cp, &end, 10);
2913                 } else {
2914                         end = "";
2915                 }
2916                 if (numericsid) {
2917                         free(numericsid);
2918                         numericsid = NULL;
2919                 }
2920                 if (errno != 0 || *end != '\0')
2921                         return (EINVAL);
2922         } else if (!isdigit(*cp)) {
2923                 /*
2924                  * It's a user/group name (eg "user") that needs to be
2925                  * turned into a uid/gid
2926                  */
2927                 if (zoned && getzoneid() == GLOBAL_ZONEID)
2928                         return (ENOENT);
2929                 if (isuser) {
2930                         struct passwd *pw;
2931                         pw = getpwnam(cp);
2932                         if (pw == NULL)
2933                                 return (ENOENT);
2934                         *ridp = pw->pw_uid;
2935                 } else {
2936                         struct group *gr;
2937                         gr = getgrnam(cp);
2938                         if (gr == NULL)
2939                                 return (ENOENT);
2940                         *ridp = gr->gr_gid;
2941                 }
2942         } else {
2943                 /* It's a user/group ID (eg "12345"). */
2944                 uid_t id = strtoul(cp, &end, 10);
2945                 idmap_rid_t rid;
2946                 char *mapdomain;
2947 
2948                 if (*end != '\0')
2949                         return (EINVAL);
2950                 if (id > MAXUID) {
2951                         /* It's an ephemeral ID. */
2952                         if (idmap_id_to_numeric_domain_rid(id, isuser,
2953                             &mapdomain, &rid) != 0)
2954                                 return (ENOENT);
2955                         (void) strlcpy(domain, mapdomain, domainlen);
2956                         *ridp = rid;
2957                 } else {
2958                         *ridp = id;
2959                 }
2960         }
2961 
2962         ASSERT3P(numericsid, ==, NULL);
2963         return (0);
2964 }
2965 
2966 static int
2967 zfs_prop_get_userquota_common(zfs_handle_t *zhp, const char *propname,
2968     uint64_t *propvalue, zfs_userquota_prop_t *typep)
2969 {
2970         int err;
2971         zfs_cmd_t zc = { 0 };
2972 
2973         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
2974 
2975         err = userquota_propname_decode(propname,
2976             zfs_prop_get_int(zhp, ZFS_PROP_ZONED),
2977             typep, zc.zc_value, sizeof (zc.zc_value), &zc.zc_guid);
2978         zc.zc_objset_type = *typep;
2979         if (err)
2980                 return (err);
2981 
2982         err = ioctl(zhp->zfs_hdl->libzfs_fd, ZFS_IOC_USERSPACE_ONE, &zc);
2983         if (err)
2984                 return (err);
2985 
2986         *propvalue = zc.zc_cookie;
2987         return (0);
2988 }
2989 
2990 int
2991 zfs_prop_get_userquota_int(zfs_handle_t *zhp, const char *propname,
2992     uint64_t *propvalue)
2993 {
2994         zfs_userquota_prop_t type;
2995 
2996         return (zfs_prop_get_userquota_common(zhp, propname, propvalue,
2997             &type));
2998 }
2999 
3000 int
3001 zfs_prop_get_userquota(zfs_handle_t *zhp, const char *propname,
3002     char *propbuf, int proplen, boolean_t literal)
3003 {
3004         int err;
3005         uint64_t propvalue;
3006         zfs_userquota_prop_t type;
3007 
3008         err = zfs_prop_get_userquota_common(zhp, propname, &propvalue,
3009             &type);
3010 
3011         if (err)
3012                 return (err);
3013 
3014         if (literal) {
3015                 (void) snprintf(propbuf, proplen, "%llu", propvalue);
3016         } else if (propvalue == 0 &&
3017             (type == ZFS_PROP_USERQUOTA || type == ZFS_PROP_GROUPQUOTA)) {
3018                 (void) strlcpy(propbuf, "none", proplen);
3019         } else {
3020                 zfs_nicenum(propvalue, propbuf, proplen);
3021         }
3022         return (0);
3023 }
3024 
3025 int
3026 zfs_prop_get_written_int(zfs_handle_t *zhp, const char *propname,
3027     uint64_t *propvalue)
3028 {
3029         int err;
3030         zfs_cmd_t zc = { 0 };
3031         const char *snapname;
3032 
3033         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
3034 
3035         snapname = strchr(propname, '@') + 1;
3036         if (strchr(snapname, '@')) {
3037                 (void) strlcpy(zc.zc_value, snapname, sizeof (zc.zc_value));
3038         } else {
3039                 /* snapname is the short name, append it to zhp's fsname */
3040                 char *cp;
3041 
3042                 (void) strlcpy(zc.zc_value, zhp->zfs_name,
3043                     sizeof (zc.zc_value));
3044                 cp = strchr(zc.zc_value, '@');
3045                 if (cp != NULL)
3046                         *cp = '\0';
3047                 (void) strlcat(zc.zc_value, "@", sizeof (zc.zc_value));
3048                 (void) strlcat(zc.zc_value, snapname, sizeof (zc.zc_value));
3049         }
3050 
3051         err = ioctl(zhp->zfs_hdl->libzfs_fd, ZFS_IOC_SPACE_WRITTEN, &zc);
3052         if (err)
3053                 return (err);
3054 
3055         *propvalue = zc.zc_cookie;
3056         return (0);
3057 }
3058 
3059 int
3060 zfs_prop_get_written(zfs_handle_t *zhp, const char *propname,
3061     char *propbuf, int proplen, boolean_t literal)
3062 {
3063         int err;
3064         uint64_t propvalue;
3065 
3066         err = zfs_prop_get_written_int(zhp, propname, &propvalue);
3067 
3068         if (err)
3069                 return (err);
3070 
3071         if (literal) {
3072                 (void) snprintf(propbuf, proplen, "%llu", propvalue);
3073         } else {
3074                 zfs_nicenum(propvalue, propbuf, proplen);
3075         }
3076         return (0);
3077 }
3078 
3079 /*
3080  * Returns the name of the given zfs handle.
3081  */
3082 const char *
3083 zfs_get_name(const zfs_handle_t *zhp)
3084 {
3085         return (zhp->zfs_name);
3086 }
3087 
3088 /*
3089  * Returns the name of the parent pool for the given zfs handle.
3090  */
3091 const char *
3092 zfs_get_pool_name(const zfs_handle_t *zhp)
3093 {
3094         return (zhp->zpool_hdl->zpool_name);
3095 }
3096 
3097 /*
3098  * Returns the type of the given zfs handle.
3099  */
3100 zfs_type_t
3101 zfs_get_type(const zfs_handle_t *zhp)
3102 {
3103         return (zhp->zfs_type);
3104 }
3105 
3106 /*
3107  * Is one dataset name a child dataset of another?
3108  *
3109  * Needs to handle these cases:
3110  * Dataset 1    "a/foo"         "a/foo"         "a/foo"         "a/foo"
3111  * Dataset 2    "a/fo"          "a/foobar"      "a/bar/baz"     "a/foo/bar"
3112  * Descendant?  No.             No.             No.             Yes.
3113  */
3114 static boolean_t
3115 is_descendant(const char *ds1, const char *ds2)
3116 {
3117         size_t d1len = strlen(ds1);
3118 
3119         /* ds2 can't be a descendant if it's smaller */
3120         if (strlen(ds2) < d1len)
3121                 return (B_FALSE);
3122 
3123         /* otherwise, compare strings and verify that there's a '/' char */
3124         return (ds2[d1len] == '/' && (strncmp(ds1, ds2, d1len) == 0));
3125 }
3126 
3127 /*
3128  * Given a complete name, return just the portion that refers to the parent.
3129  * Will return -1 if there is no parent (path is just the name of the
3130  * pool).
3131  */
3132 static int
3133 parent_name(const char *path, char *buf, size_t buflen)
3134 {
3135         char *slashp;
3136 
3137         (void) strlcpy(buf, path, buflen);
3138 
3139         if ((slashp = strrchr(buf, '/')) == NULL)
3140                 return (-1);
3141         *slashp = '\0';
3142 
3143         return (0);
3144 }
3145 
3146 /*
3147  * If accept_ancestor is false, then check to make sure that the given path has
3148  * a parent, and that it exists.  If accept_ancestor is true, then find the
3149  * closest existing ancestor for the given path.  In prefixlen return the
3150  * length of already existing prefix of the given path.  We also fetch the
3151  * 'zoned' property, which is used to validate property settings when creating
3152  * new datasets.
3153  */
3154 static int
3155 check_parents(libzfs_handle_t *hdl, const char *path, uint64_t *zoned,
3156     boolean_t accept_ancestor, int *prefixlen)
3157 {
3158         zfs_cmd_t zc = { 0 };
3159         char parent[ZFS_MAX_DATASET_NAME_LEN];
3160         char *slash;
3161         zfs_handle_t *zhp;
3162         char errbuf[1024];
3163         uint64_t is_zoned;
3164 
3165         (void) snprintf(errbuf, sizeof (errbuf),
3166             dgettext(TEXT_DOMAIN, "cannot create '%s'"), path);
3167 
3168         /* get parent, and check to see if this is just a pool */
3169         if (parent_name(path, parent, sizeof (parent)) != 0) {
3170                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3171                     "missing dataset name"));
3172                 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3173         }
3174 
3175         /* check to see if the pool exists */
3176         if ((slash = strchr(parent, '/')) == NULL)
3177                 slash = parent + strlen(parent);
3178         (void) strncpy(zc.zc_name, parent, slash - parent);
3179         zc.zc_name[slash - parent] = '\0';
3180         if (ioctl(hdl->libzfs_fd, ZFS_IOC_OBJSET_STATS, &zc) != 0 &&
3181             errno == ENOENT) {
3182                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3183                     "no such pool '%s'"), zc.zc_name);
3184                 return (zfs_error(hdl, EZFS_NOENT, errbuf));
3185         }
3186 
3187         /* check to see if the parent dataset exists */
3188         while ((zhp = make_dataset_handle(hdl, parent)) == NULL) {
3189                 if (errno == ENOENT && accept_ancestor) {
3190                         /*
3191                          * Go deeper to find an ancestor, give up on top level.
3192                          */
3193                         if (parent_name(parent, parent, sizeof (parent)) != 0) {
3194                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3195                                     "no such pool '%s'"), zc.zc_name);
3196                                 return (zfs_error(hdl, EZFS_NOENT, errbuf));
3197                         }
3198                 } else if (errno == ENOENT) {
3199                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3200                             "parent does not exist"));
3201                         return (zfs_error(hdl, EZFS_NOENT, errbuf));
3202                 } else
3203                         return (zfs_standard_error(hdl, errno, errbuf));
3204         }
3205 
3206         is_zoned = zfs_prop_get_int(zhp, ZFS_PROP_ZONED);
3207         if (zoned != NULL)
3208                 *zoned = is_zoned;
3209 
3210         /* we are in a non-global zone, but parent is in the global zone */
3211         if (getzoneid() != GLOBAL_ZONEID && !is_zoned) {
3212                 (void) zfs_standard_error(hdl, EPERM, errbuf);
3213                 zfs_close(zhp);
3214                 return (-1);
3215         }
3216 
3217         /* make sure parent is a filesystem */
3218         if (zfs_get_type(zhp) != ZFS_TYPE_FILESYSTEM) {
3219                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3220                     "parent is not a filesystem"));
3221                 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf);
3222                 zfs_close(zhp);
3223                 return (-1);
3224         }
3225 
3226         zfs_close(zhp);
3227         if (prefixlen != NULL)
3228                 *prefixlen = strlen(parent);
3229         return (0);
3230 }
3231 
3232 /*
3233  * Finds whether the dataset of the given type(s) exists.
3234  */
3235 boolean_t
3236 zfs_dataset_exists(libzfs_handle_t *hdl, const char *path, zfs_type_t types)
3237 {
3238         zfs_handle_t *zhp;
3239 
3240         if (!zfs_validate_name(hdl, path, types, B_FALSE))
3241                 return (B_FALSE);
3242 
3243         /*
3244          * Try to get stats for the dataset, which will tell us if it exists.
3245          */
3246         if ((zhp = make_dataset_handle(hdl, path)) != NULL) {
3247                 int ds_type = zhp->zfs_type;
3248 
3249                 zfs_close(zhp);
3250                 if (types & ds_type)
3251                         return (B_TRUE);
3252         }
3253         return (B_FALSE);
3254 }
3255 
3256 /*
3257  * Given a path to 'target', create all the ancestors between
3258  * the prefixlen portion of the path, and the target itself.
3259  * Fail if the initial prefixlen-ancestor does not already exist.
3260  */
3261 int
3262 create_parents(libzfs_handle_t *hdl, char *target, int prefixlen)
3263 {
3264         zfs_handle_t *h;
3265         char *cp;
3266         const char *opname;
3267 
3268         /* make sure prefix exists */
3269         cp = target + prefixlen;
3270         if (*cp != '/') {
3271                 assert(strchr(cp, '/') == NULL);
3272                 h = zfs_open(hdl, target, ZFS_TYPE_FILESYSTEM);
3273         } else {
3274                 *cp = '\0';
3275                 h = zfs_open(hdl, target, ZFS_TYPE_FILESYSTEM);
3276                 *cp = '/';
3277         }
3278         if (h == NULL)
3279                 return (-1);
3280         zfs_close(h);
3281 
3282         /*
3283          * Attempt to create, mount, and share any ancestor filesystems,
3284          * up to the prefixlen-long one.
3285          */
3286         for (cp = target + prefixlen + 1;
3287             (cp = strchr(cp, '/')) != NULL; *cp = '/', cp++) {
3288 
3289                 *cp = '\0';
3290 
3291                 h = make_dataset_handle(hdl, target);
3292                 if (h) {
3293                         /* it already exists, nothing to do here */
3294                         zfs_close(h);
3295                         continue;
3296                 }
3297 
3298                 if (zfs_create(hdl, target, ZFS_TYPE_FILESYSTEM,
3299                     NULL) != 0) {
3300                         opname = dgettext(TEXT_DOMAIN, "create");
3301                         goto ancestorerr;
3302                 }
3303 
3304                 h = zfs_open(hdl, target, ZFS_TYPE_FILESYSTEM);
3305                 if (h == NULL) {
3306                         opname = dgettext(TEXT_DOMAIN, "open");
3307                         goto ancestorerr;
3308                 }
3309 
3310                 if (zfs_mount(h, NULL, 0) != 0) {
3311                         opname = dgettext(TEXT_DOMAIN, "mount");
3312                         goto ancestorerr;
3313                 }
3314 
3315                 if (zfs_share(h) != 0) {
3316                         opname = dgettext(TEXT_DOMAIN, "share");
3317                         goto ancestorerr;
3318                 }
3319 
3320                 zfs_close(h);
3321         }
3322 
3323         return (0);
3324 
3325 ancestorerr:
3326         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3327             "failed to %s ancestor '%s'"), opname, target);
3328         return (-1);
3329 }
3330 
3331 /*
3332  * Creates non-existing ancestors of the given path.
3333  */
3334 int
3335 zfs_create_ancestors(libzfs_handle_t *hdl, const char *path)
3336 {
3337         int prefix;
3338         char *path_copy;
3339         int rc = 0;
3340 
3341         if (check_parents(hdl, path, NULL, B_TRUE, &prefix) != 0)
3342                 return (-1);
3343 
3344         if ((path_copy = strdup(path)) != NULL) {
3345                 rc = create_parents(hdl, path_copy, prefix);
3346                 free(path_copy);
3347         }
3348         if (path_copy == NULL || rc != 0)
3349                 return (-1);
3350 
3351         return (0);
3352 }
3353 
3354 /*
3355  * Create a new filesystem or volume.
3356  */
3357 int
3358 zfs_create(libzfs_handle_t *hdl, const char *path, zfs_type_t type,
3359     nvlist_t *props)
3360 {
3361         int ret;
3362         uint64_t size = 0;
3363         uint64_t blocksize = zfs_prop_default_numeric(ZFS_PROP_VOLBLOCKSIZE);
3364         char errbuf[1024];
3365         uint64_t zoned;
3366         enum lzc_dataset_type ost;
3367         zpool_handle_t *zpool_handle;
3368 
3369         (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3370             "cannot create '%s'"), path);
3371 
3372         /* validate the path, taking care to note the extended error message */
3373         if (!zfs_validate_name(hdl, path, type, B_TRUE))
3374                 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3375 
3376         /* validate parents exist */
3377         if (check_parents(hdl, path, &zoned, B_FALSE, NULL) != 0)
3378                 return (-1);
3379 
3380         /*
3381          * The failure modes when creating a dataset of a different type over
3382          * one that already exists is a little strange.  In particular, if you
3383          * try to create a dataset on top of an existing dataset, the ioctl()
3384          * will return ENOENT, not EEXIST.  To prevent this from happening, we
3385          * first try to see if the dataset exists.
3386          */
3387         if (zfs_dataset_exists(hdl, path, ZFS_TYPE_DATASET)) {
3388                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3389                     "dataset already exists"));
3390                 return (zfs_error(hdl, EZFS_EXISTS, errbuf));
3391         }
3392 
3393         if (type == ZFS_TYPE_VOLUME)
3394                 ost = LZC_DATSET_TYPE_ZVOL;
3395         else
3396                 ost = LZC_DATSET_TYPE_ZFS;
3397 
3398         /* open zpool handle for prop validation */
3399         char pool_path[ZFS_MAX_DATASET_NAME_LEN];
3400         (void) strlcpy(pool_path, path, sizeof (pool_path));
3401 
3402         /* truncate pool_path at first slash */
3403         char *p = strchr(pool_path, '/');
3404         if (p != NULL)
3405                 *p = '\0';
3406 
3407         if ((zpool_handle = zpool_open(hdl, pool_path)) == NULL)
3408                 return (-1);
3409 
3410         if (props && (props = zfs_valid_proplist(hdl, type, props,
3411             zoned, NULL, zpool_handle, errbuf)) == 0) {
3412                 zpool_close(zpool_handle);
3413                 return (-1);
3414         }
3415         zpool_close(zpool_handle);
3416 
3417         if (type == ZFS_TYPE_VOLUME) {
3418                 /*
3419                  * If we are creating a volume, the size and block size must
3420                  * satisfy a few restraints.  First, the blocksize must be a
3421                  * valid block size between SPA_{MIN,MAX}BLOCKSIZE.  Second, the
3422                  * volsize must be a multiple of the block size, and cannot be
3423                  * zero.
3424                  */
3425                 if (props == NULL || nvlist_lookup_uint64(props,
3426                     zfs_prop_to_name(ZFS_PROP_VOLSIZE), &size) != 0) {
3427                         nvlist_free(props);
3428                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3429                             "missing volume size"));
3430                         return (zfs_error(hdl, EZFS_BADPROP, errbuf));
3431                 }
3432 
3433                 if ((ret = nvlist_lookup_uint64(props,
3434                     zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE),
3435                     &blocksize)) != 0) {
3436                         if (ret == ENOENT) {
3437                                 blocksize = zfs_prop_default_numeric(
3438                                     ZFS_PROP_VOLBLOCKSIZE);
3439                         } else {
3440                                 nvlist_free(props);
3441                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3442                                     "missing volume block size"));
3443                                 return (zfs_error(hdl, EZFS_BADPROP, errbuf));
3444                         }
3445                 }
3446 
3447                 if (size == 0) {
3448                         nvlist_free(props);
3449                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3450                             "volume size cannot be zero"));
3451                         return (zfs_error(hdl, EZFS_BADPROP, errbuf));
3452                 }
3453 
3454                 if (size % blocksize != 0) {
3455                         nvlist_free(props);
3456                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3457                             "volume size must be a multiple of volume block "
3458                             "size"));
3459                         return (zfs_error(hdl, EZFS_BADPROP, errbuf));
3460                 }
3461         }
3462 
3463         /* create the dataset */
3464         ret = lzc_create(path, ost, props);
3465         nvlist_free(props);
3466 
3467         /* check for failure */
3468         if (ret != 0) {
3469                 char parent[ZFS_MAX_DATASET_NAME_LEN];
3470                 (void) parent_name(path, parent, sizeof (parent));
3471 
3472                 switch (errno) {
3473                 case ENOENT:
3474                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3475                             "no such parent '%s'"), parent);
3476                         return (zfs_error(hdl, EZFS_NOENT, errbuf));
3477 
3478                 case EINVAL:
3479                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3480                             "parent '%s' is not a filesystem"), parent);
3481                         return (zfs_error(hdl, EZFS_BADTYPE, errbuf));
3482 
3483                 case ENOTSUP:
3484                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3485                             "pool must be upgraded to set this "
3486                             "property or value"));
3487                         return (zfs_error(hdl, EZFS_BADVERSION, errbuf));
3488 #ifdef _ILP32
3489                 case EOVERFLOW:
3490                         /*
3491                          * This platform can't address a volume this big.
3492                          */
3493                         if (type == ZFS_TYPE_VOLUME)
3494                                 return (zfs_error(hdl, EZFS_VOLTOOBIG,
3495                                     errbuf));
3496 #endif
3497                         /* FALLTHROUGH */
3498                 default:
3499                         return (zfs_standard_error(hdl, errno, errbuf));
3500                 }
3501         }
3502 
3503         return (0);
3504 }
3505 
3506 /*
3507  * Destroys the given dataset.  The caller must make sure that the filesystem
3508  * isn't mounted, and that there are no active dependents. If the file system
3509  * does not exist this function does nothing.
3510  */
3511 int
3512 zfs_destroy(zfs_handle_t *zhp, boolean_t defer)
3513 {
3514         zfs_cmd_t zc = { 0 };
3515 
3516         if (zhp->zfs_type == ZFS_TYPE_BOOKMARK) {
3517                 nvlist_t *nv = fnvlist_alloc();
3518                 fnvlist_add_boolean(nv, zhp->zfs_name);
3519                 int error = lzc_destroy_bookmarks(nv, NULL);
3520                 fnvlist_free(nv);
3521                 if (error != 0) {
3522                         return (zfs_standard_error_fmt(zhp->zfs_hdl, errno,
3523                             dgettext(TEXT_DOMAIN, "cannot destroy '%s'"),
3524                             zhp->zfs_name));
3525                 }
3526                 return (0);
3527         }
3528 
3529         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
3530 
3531         if (ZFS_IS_VOLUME(zhp)) {
3532                 zc.zc_objset_type = DMU_OST_ZVOL;
3533         } else {
3534                 zc.zc_objset_type = DMU_OST_ZFS;
3535         }
3536 
3537         zc.zc_defer_destroy = defer;
3538         if (zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_DESTROY, &zc) != 0 &&
3539             errno != ENOENT) {
3540                 return (zfs_standard_error_fmt(zhp->zfs_hdl, errno,
3541                     dgettext(TEXT_DOMAIN, "cannot destroy '%s'"),
3542                     zhp->zfs_name));
3543         }
3544 
3545         remove_mountpoint(zhp);
3546 
3547         return (0);
3548 }
3549 
3550 struct destroydata {
3551         nvlist_t *nvl;
3552         const char *snapname;
3553 };
3554 
3555 static int
3556 zfs_check_snap_cb(zfs_handle_t *zhp, void *arg)
3557 {
3558         struct destroydata *dd = arg;
3559         char name[ZFS_MAX_DATASET_NAME_LEN];
3560         int rv = 0;
3561 
3562         (void) snprintf(name, sizeof (name),
3563             "%s@%s", zhp->zfs_name, dd->snapname);
3564 
3565         if (lzc_exists(name))
3566                 verify(nvlist_add_boolean(dd->nvl, name) == 0);
3567 
3568         rv = zfs_iter_filesystems(zhp, zfs_check_snap_cb, dd);
3569         zfs_close(zhp);
3570         return (rv);
3571 }
3572 
3573 /*
3574  * Destroys all snapshots with the given name in zhp & descendants.
3575  */
3576 int
3577 zfs_destroy_snaps(zfs_handle_t *zhp, char *snapname, boolean_t defer)
3578 {
3579         int ret;
3580         struct destroydata dd = { 0 };
3581 
3582         dd.snapname = snapname;
3583         verify(nvlist_alloc(&dd.nvl, NV_UNIQUE_NAME, 0) == 0);
3584         (void) zfs_check_snap_cb(zfs_handle_dup(zhp), &dd);
3585 
3586         if (nvlist_empty(dd.nvl)) {
3587                 ret = zfs_standard_error_fmt(zhp->zfs_hdl, ENOENT,
3588                     dgettext(TEXT_DOMAIN, "cannot destroy '%s@%s'"),
3589                     zhp->zfs_name, snapname);
3590         } else {
3591                 ret = zfs_destroy_snaps_nvl(zhp->zfs_hdl, dd.nvl, defer);
3592         }
3593         nvlist_free(dd.nvl);
3594         return (ret);
3595 }
3596 
3597 /*
3598  * Destroys all the snapshots named in the nvlist.
3599  */
3600 int
3601 zfs_destroy_snaps_nvl(libzfs_handle_t *hdl, nvlist_t *snaps, boolean_t defer)
3602 {
3603         int ret;
3604         nvlist_t *errlist = NULL;
3605 
3606         ret = lzc_destroy_snaps(snaps, defer, &errlist);
3607 
3608         if (ret == 0) {
3609                 nvlist_free(errlist);
3610                 return (0);
3611         }
3612 
3613         if (nvlist_empty(errlist)) {
3614                 char errbuf[1024];
3615                 (void) snprintf(errbuf, sizeof (errbuf),
3616                     dgettext(TEXT_DOMAIN, "cannot destroy snapshots"));
3617 
3618                 ret = zfs_standard_error(hdl, ret, errbuf);
3619         }
3620         for (nvpair_t *pair = nvlist_next_nvpair(errlist, NULL);
3621             pair != NULL; pair = nvlist_next_nvpair(errlist, pair)) {
3622                 char errbuf[1024];
3623                 (void) snprintf(errbuf, sizeof (errbuf),
3624                     dgettext(TEXT_DOMAIN, "cannot destroy snapshot %s"),
3625                     nvpair_name(pair));
3626 
3627                 switch (fnvpair_value_int32(pair)) {
3628                 case EEXIST:
3629                         zfs_error_aux(hdl,
3630                             dgettext(TEXT_DOMAIN, "snapshot is cloned"));
3631                         ret = zfs_error(hdl, EZFS_EXISTS, errbuf);
3632                         break;
3633                 default:
3634                         ret = zfs_standard_error(hdl, errno, errbuf);
3635                         break;
3636                 }
3637         }
3638 
3639         nvlist_free(errlist);
3640         return (ret);
3641 }
3642 
3643 /*
3644  * Clones the given dataset.  The target must be of the same type as the source.
3645  */
3646 int
3647 zfs_clone(zfs_handle_t *zhp, const char *target, nvlist_t *props)
3648 {
3649         char parent[ZFS_MAX_DATASET_NAME_LEN];
3650         int ret;
3651         char errbuf[1024];
3652         libzfs_handle_t *hdl = zhp->zfs_hdl;
3653         uint64_t zoned;
3654 
3655         assert(zhp->zfs_type == ZFS_TYPE_SNAPSHOT);
3656 
3657         (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3658             "cannot create '%s'"), target);
3659 
3660         /* validate the target/clone name */
3661         if (!zfs_validate_name(hdl, target, ZFS_TYPE_FILESYSTEM, B_TRUE))
3662                 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3663 
3664         /* validate parents exist */
3665         if (check_parents(hdl, target, &zoned, B_FALSE, NULL) != 0)
3666                 return (-1);
3667 
3668         (void) parent_name(target, parent, sizeof (parent));
3669 
3670         /* do the clone */
3671 
3672         if (props) {
3673                 zfs_type_t type;
3674                 if (ZFS_IS_VOLUME(zhp)) {
3675                         type = ZFS_TYPE_VOLUME;
3676                 } else {
3677                         type = ZFS_TYPE_FILESYSTEM;
3678                 }
3679                 if ((props = zfs_valid_proplist(hdl, type, props, zoned,
3680                     zhp, zhp->zpool_hdl, errbuf)) == NULL)
3681                         return (-1);
3682         }
3683 
3684         ret = lzc_clone(target, zhp->zfs_name, props);
3685         nvlist_free(props);
3686 
3687         if (ret != 0) {
3688                 switch (errno) {
3689 
3690                 case ENOENT:
3691                         /*
3692                          * The parent doesn't exist.  We should have caught this
3693                          * above, but there may a race condition that has since
3694                          * destroyed the parent.
3695                          *
3696                          * At this point, we don't know whether it's the source
3697                          * that doesn't exist anymore, or whether the target
3698                          * dataset doesn't exist.
3699                          */
3700                         zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN,
3701                             "no such parent '%s'"), parent);
3702                         return (zfs_error(zhp->zfs_hdl, EZFS_NOENT, errbuf));
3703 
3704                 case EXDEV:
3705                         zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN,
3706                             "source and target pools differ"));
3707                         return (zfs_error(zhp->zfs_hdl, EZFS_CROSSTARGET,
3708                             errbuf));
3709 
3710                 default:
3711                         return (zfs_standard_error(zhp->zfs_hdl, errno,
3712                             errbuf));
3713                 }
3714         }
3715 
3716         return (ret);
3717 }
3718 
3719 /*
3720  * Promotes the given clone fs to be the clone parent.
3721  */
3722 int
3723 zfs_promote(zfs_handle_t *zhp)
3724 {
3725         libzfs_handle_t *hdl = zhp->zfs_hdl;
3726         char snapname[ZFS_MAX_DATASET_NAME_LEN];
3727         int ret;
3728         char errbuf[1024];
3729 
3730         (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3731             "cannot promote '%s'"), zhp->zfs_name);
3732 
3733         if (zhp->zfs_type == ZFS_TYPE_SNAPSHOT) {
3734                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3735                     "snapshots can not be promoted"));
3736                 return (zfs_error(hdl, EZFS_BADTYPE, errbuf));
3737         }
3738 
3739         if (zhp->zfs_dmustats.dds_origin[0] == '\0') {
3740                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3741                     "not a cloned filesystem"));
3742                 return (zfs_error(hdl, EZFS_BADTYPE, errbuf));
3743         }
3744 
3745         ret = lzc_promote(zhp->zfs_name, snapname, sizeof (snapname));
3746 
3747         if (ret != 0) {
3748                 switch (ret) {
3749                 case EEXIST:
3750                         /* There is a conflicting snapshot name. */
3751                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3752                             "conflicting snapshot '%s' from parent '%s'"),
3753                             snapname, zhp->zfs_dmustats.dds_origin);
3754                         return (zfs_error(hdl, EZFS_EXISTS, errbuf));
3755 
3756                 default:
3757                         return (zfs_standard_error(hdl, ret, errbuf));
3758                 }
3759         }
3760         return (ret);
3761 }
3762 
3763 typedef struct snapdata {
3764         nvlist_t *sd_nvl;
3765         const char *sd_snapname;
3766 } snapdata_t;
3767 
3768 static int
3769 zfs_snapshot_cb(zfs_handle_t *zhp, void *arg)
3770 {
3771         snapdata_t *sd = arg;
3772         char name[ZFS_MAX_DATASET_NAME_LEN];
3773         int rv = 0;
3774 
3775         if (zfs_prop_get_int(zhp, ZFS_PROP_INCONSISTENT) == 0) {
3776                 (void) snprintf(name, sizeof (name),
3777                     "%s@%s", zfs_get_name(zhp), sd->sd_snapname);
3778 
3779                 fnvlist_add_boolean(sd->sd_nvl, name);
3780 
3781                 rv = zfs_iter_filesystems(zhp, zfs_snapshot_cb, sd);
3782         }
3783         zfs_close(zhp);
3784 
3785         return (rv);
3786 }
3787 
3788 /*
3789  * Creates snapshots.  The keys in the snaps nvlist are the snapshots to be
3790  * created.
3791  */
3792 int
3793 zfs_snapshot_nvl(libzfs_handle_t *hdl, nvlist_t *snaps, nvlist_t *props)
3794 {
3795         int ret;
3796         char errbuf[1024];
3797         nvpair_t *elem;
3798         nvlist_t *errors;
3799 
3800         (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3801             "cannot create snapshots "));
3802 
3803         elem = NULL;
3804         while ((elem = nvlist_next_nvpair(snaps, elem)) != NULL) {
3805                 const char *snapname = nvpair_name(elem);
3806 
3807                 /* validate the target name */
3808                 if (!zfs_validate_name(hdl, snapname, ZFS_TYPE_SNAPSHOT,
3809                     B_TRUE)) {
3810                         (void) snprintf(errbuf, sizeof (errbuf),
3811                             dgettext(TEXT_DOMAIN,
3812                             "cannot create snapshot '%s'"), snapname);
3813                         return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3814                 }
3815         }
3816 
3817         /*
3818          * get pool handle for prop validation. assumes all snaps are in the
3819          * same pool, as does lzc_snapshot (below).
3820          */
3821         char pool[ZFS_MAX_DATASET_NAME_LEN];
3822         elem = nvlist_next_nvpair(snaps, NULL);
3823         (void) strlcpy(pool, nvpair_name(elem), sizeof (pool));
3824         pool[strcspn(pool, "/@")] = '\0';
3825         zpool_handle_t *zpool_hdl = zpool_open(hdl, pool);
3826 
3827         if (props != NULL &&
3828             (props = zfs_valid_proplist(hdl, ZFS_TYPE_SNAPSHOT,
3829             props, B_FALSE, NULL, zpool_hdl, errbuf)) == NULL) {
3830                 zpool_close(zpool_hdl);
3831                 return (-1);
3832         }
3833         zpool_close(zpool_hdl);
3834 
3835         ret = lzc_snapshot(snaps, props, &errors);
3836 
3837         if (ret != 0) {
3838                 boolean_t printed = B_FALSE;
3839                 for (elem = nvlist_next_nvpair(errors, NULL);
3840                     elem != NULL;
3841                     elem = nvlist_next_nvpair(errors, elem)) {
3842                         (void) snprintf(errbuf, sizeof (errbuf),
3843                             dgettext(TEXT_DOMAIN,
3844                             "cannot create snapshot '%s'"), nvpair_name(elem));
3845                         (void) zfs_standard_error(hdl,
3846                             fnvpair_value_int32(elem), errbuf);
3847                         printed = B_TRUE;
3848                 }
3849                 if (!printed) {
3850                         switch (ret) {
3851                         case EXDEV:
3852                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3853                                     "multiple snapshots of same "
3854                                     "fs not allowed"));
3855                                 (void) zfs_error(hdl, EZFS_EXISTS, errbuf);
3856 
3857                                 break;
3858                         default:
3859                                 (void) zfs_standard_error(hdl, ret, errbuf);
3860                         }
3861                 }
3862         }
3863 
3864         nvlist_free(props);
3865         nvlist_free(errors);
3866         return (ret);
3867 }
3868 
3869 int
3870 zfs_snapshot(libzfs_handle_t *hdl, const char *path, boolean_t recursive,
3871     nvlist_t *props)
3872 {
3873         int ret;
3874         snapdata_t sd = { 0 };
3875         char fsname[ZFS_MAX_DATASET_NAME_LEN];
3876         char *cp;
3877         zfs_handle_t *zhp;
3878         char errbuf[1024];
3879 
3880         (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3881             "cannot snapshot %s"), path);
3882 
3883         if (!zfs_validate_name(hdl, path, ZFS_TYPE_SNAPSHOT, B_TRUE))
3884                 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3885 
3886         (void) strlcpy(fsname, path, sizeof (fsname));
3887         cp = strchr(fsname, '@');
3888         *cp = '\0';
3889         sd.sd_snapname = cp + 1;
3890 
3891         if ((zhp = zfs_open(hdl, fsname, ZFS_TYPE_FILESYSTEM |
3892             ZFS_TYPE_VOLUME)) == NULL) {
3893                 return (-1);
3894         }
3895 
3896         verify(nvlist_alloc(&sd.sd_nvl, NV_UNIQUE_NAME, 0) == 0);
3897         if (recursive) {
3898                 (void) zfs_snapshot_cb(zfs_handle_dup(zhp), &sd);
3899         } else {
3900                 fnvlist_add_boolean(sd.sd_nvl, path);
3901         }
3902 
3903         ret = zfs_snapshot_nvl(hdl, sd.sd_nvl, props);
3904         nvlist_free(sd.sd_nvl);
3905         zfs_close(zhp);
3906         return (ret);
3907 }
3908 
3909 /*
3910  * Destroy any more recent snapshots.  We invoke this callback on any dependents
3911  * of the snapshot first.  If the 'cb_dependent' member is non-zero, then this
3912  * is a dependent and we should just destroy it without checking the transaction
3913  * group.
3914  */
3915 typedef struct rollback_data {
3916         const char      *cb_target;             /* the snapshot */
3917         uint64_t        cb_create;              /* creation time reference */
3918         boolean_t       cb_error;
3919         boolean_t       cb_force;
3920 } rollback_data_t;
3921 
3922 static int
3923 rollback_destroy_dependent(zfs_handle_t *zhp, void *data)
3924 {
3925         rollback_data_t *cbp = data;
3926         prop_changelist_t *clp;
3927 
3928         /* We must destroy this clone; first unmount it */
3929         clp = changelist_gather(zhp, ZFS_PROP_NAME, 0,
3930             cbp->cb_force ? MS_FORCE: 0);
3931         if (clp == NULL || changelist_prefix(clp) != 0) {
3932                 cbp->cb_error = B_TRUE;
3933                 zfs_close(zhp);
3934                 return (0);
3935         }
3936         if (zfs_destroy(zhp, B_FALSE) != 0)
3937                 cbp->cb_error = B_TRUE;
3938         else
3939                 changelist_remove(clp, zhp->zfs_name);
3940         (void) changelist_postfix(clp);
3941         changelist_free(clp);
3942 
3943         zfs_close(zhp);
3944         return (0);
3945 }
3946 
3947 static int
3948 rollback_destroy(zfs_handle_t *zhp, void *data)
3949 {
3950         rollback_data_t *cbp = data;
3951 
3952         if (zfs_prop_get_int(zhp, ZFS_PROP_CREATETXG) > cbp->cb_create) {
3953                 cbp->cb_error |= zfs_iter_dependents(zhp, B_FALSE,
3954                     rollback_destroy_dependent, cbp);
3955 
3956                 cbp->cb_error |= zfs_destroy(zhp, B_FALSE);
3957         }
3958 
3959         zfs_close(zhp);
3960         return (0);
3961 }
3962 
3963 /*
3964  * Given a dataset, rollback to a specific snapshot, discarding any
3965  * data changes since then and making it the active dataset.
3966  *
3967  * Any snapshots and bookmarks more recent than the target are
3968  * destroyed, along with their dependents (i.e. clones).
3969  */
3970 int
3971 zfs_rollback(zfs_handle_t *zhp, zfs_handle_t *snap, boolean_t force)
3972 {
3973         rollback_data_t cb = { 0 };
3974         int err;
3975         boolean_t restore_resv = 0;
3976         uint64_t old_volsize = 0, new_volsize;
3977         zfs_prop_t resv_prop;
3978 
3979         assert(zhp->zfs_type == ZFS_TYPE_FILESYSTEM ||
3980             zhp->zfs_type == ZFS_TYPE_VOLUME);
3981 
3982         /*
3983          * Destroy all recent snapshots and their dependents.
3984          */
3985         cb.cb_force = force;
3986         cb.cb_target = snap->zfs_name;
3987         cb.cb_create = zfs_prop_get_int(snap, ZFS_PROP_CREATETXG);
3988         (void) zfs_iter_snapshots(zhp, B_FALSE, rollback_destroy, &cb);
3989         (void) zfs_iter_bookmarks(zhp, rollback_destroy, &cb);
3990 
3991         if (cb.cb_error)
3992                 return (-1);
3993 
3994         /*
3995          * Now that we have verified that the snapshot is the latest,
3996          * rollback to the given snapshot.
3997          */
3998 
3999         if (zhp->zfs_type == ZFS_TYPE_VOLUME) {
4000                 if (zfs_which_resv_prop(zhp, &resv_prop) < 0)
4001                         return (-1);
4002                 old_volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE);
4003                 restore_resv =
4004                     (old_volsize == zfs_prop_get_int(zhp, resv_prop));
4005         }
4006 
4007         /*
4008          * Pass both the filesystem and the wanted snapshot names,
4009          * we would get an error back if the snapshot is destroyed or
4010          * a new snapshot is created before this request is processed.
4011          */
4012         err = lzc_rollback_to(zhp->zfs_name, snap->zfs_name);
4013         if (err == EXDEV) {
4014                 zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN,
4015                     "'%s' is not the latest snapshot"), snap->zfs_name);
4016                 (void) zfs_error_fmt(zhp->zfs_hdl, EZFS_BUSY,
4017                     dgettext(TEXT_DOMAIN, "cannot rollback '%s'"),
4018                     zhp->zfs_name);
4019                 return (err);
4020         } else if (err != 0) {
4021                 (void) zfs_standard_error_fmt(zhp->zfs_hdl, errno,
4022                     dgettext(TEXT_DOMAIN, "cannot rollback '%s'"),
4023                     zhp->zfs_name);
4024                 return (err);
4025         }
4026 
4027         /*
4028          * For volumes, if the pre-rollback volsize matched the pre-
4029          * rollback reservation and the volsize has changed then set
4030          * the reservation property to the post-rollback volsize.
4031          * Make a new handle since the rollback closed the dataset.
4032          */
4033         if ((zhp->zfs_type == ZFS_TYPE_VOLUME) &&
4034             (zhp = make_dataset_handle(zhp->zfs_hdl, zhp->zfs_name))) {
4035                 if (restore_resv) {
4036                         new_volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE);
4037                         if (old_volsize != new_volsize)
4038                                 err = zfs_prop_set_int(zhp, resv_prop,
4039                                     new_volsize);
4040                 }
4041                 zfs_close(zhp);
4042         }
4043         return (err);
4044 }
4045 
4046 /*
4047  * Renames the given dataset.
4048  */
4049 int
4050 zfs_rename(zfs_handle_t *zhp, const char *target, boolean_t recursive,
4051     boolean_t force_unmount)
4052 {
4053         int ret = 0;
4054         zfs_cmd_t zc = { 0 };
4055         char *delim;
4056         prop_changelist_t *cl = NULL;
4057         zfs_handle_t *zhrp = NULL;
4058         char *parentname = NULL;
4059         char parent[ZFS_MAX_DATASET_NAME_LEN];
4060         libzfs_handle_t *hdl = zhp->zfs_hdl;
4061         char errbuf[1024];
4062 
4063         /* if we have the same exact name, just return success */
4064         if (strcmp(zhp->zfs_name, target) == 0)
4065                 return (0);
4066 
4067         (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
4068             "cannot rename to '%s'"), target);
4069 
4070         /*
4071          * Make sure the target name is valid
4072          */
4073         if (zhp->zfs_type == ZFS_TYPE_SNAPSHOT) {
4074                 if ((strchr(target, '@') == NULL) ||
4075                     *target == '@') {
4076                         /*
4077                          * Snapshot target name is abbreviated,
4078                          * reconstruct full dataset name
4079                          */
4080                         (void) strlcpy(parent, zhp->zfs_name,
4081                             sizeof (parent));
4082                         delim = strchr(parent, '@');
4083                         if (strchr(target, '@') == NULL)
4084                                 *(++delim) = '\0';
4085                         else
4086                                 *delim = '\0';
4087                         (void) strlcat(parent, target, sizeof (parent));
4088                         target = parent;
4089                 } else {
4090                         /*
4091                          * Make sure we're renaming within the same dataset.
4092                          */
4093                         delim = strchr(target, '@');
4094                         if (strncmp(zhp->zfs_name, target, delim - target)
4095                             != 0 || zhp->zfs_name[delim - target] != '@') {
4096                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4097                                     "snapshots must be part of same "
4098                                     "dataset"));
4099                                 return (zfs_error(hdl, EZFS_CROSSTARGET,
4100                                     errbuf));
4101                         }
4102                 }
4103                 if (!zfs_validate_name(hdl, target, zhp->zfs_type, B_TRUE))
4104                         return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
4105         } else {
4106                 if (recursive) {
4107                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4108                             "recursive rename must be a snapshot"));
4109                         return (zfs_error(hdl, EZFS_BADTYPE, errbuf));
4110                 }
4111 
4112                 if (!zfs_validate_name(hdl, target, zhp->zfs_type, B_TRUE))
4113                         return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
4114 
4115                 /* validate parents */
4116                 if (check_parents(hdl, target, NULL, B_FALSE, NULL) != 0)
4117                         return (-1);
4118 
4119                 /* make sure we're in the same pool */
4120                 verify((delim = strchr(target, '/')) != NULL);
4121                 if (strncmp(zhp->zfs_name, target, delim - target) != 0 ||
4122                     zhp->zfs_name[delim - target] != '/') {
4123                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4124                             "datasets must be within same pool"));
4125                         return (zfs_error(hdl, EZFS_CROSSTARGET, errbuf));
4126                 }
4127 
4128                 /* new name cannot be a child of the current dataset name */
4129                 if (is_descendant(zhp->zfs_name, target)) {
4130                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4131                             "New dataset name cannot be a descendant of "
4132                             "current dataset name"));
4133                         return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
4134                 }
4135         }
4136 
4137         (void) snprintf(errbuf, sizeof (errbuf),
4138             dgettext(TEXT_DOMAIN, "cannot rename '%s'"), zhp->zfs_name);
4139 
4140         if (getzoneid() == GLOBAL_ZONEID &&
4141             zfs_prop_get_int(zhp, ZFS_PROP_ZONED)) {
4142                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4143                     "dataset is used in a non-global zone"));
4144                 return (zfs_error(hdl, EZFS_ZONED, errbuf));
4145         }
4146 
4147         if (recursive) {
4148                 parentname = zfs_strdup(zhp->zfs_hdl, zhp->zfs_name);
4149                 if (parentname == NULL) {
4150                         ret = -1;
4151                         goto error;
4152                 }
4153                 delim = strchr(parentname, '@');
4154                 *delim = '\0';
4155                 zhrp = zfs_open(zhp->zfs_hdl, parentname, ZFS_TYPE_DATASET);
4156                 if (zhrp == NULL) {
4157                         ret = -1;
4158                         goto error;
4159                 }
4160         } else if (zhp->zfs_type != ZFS_TYPE_SNAPSHOT) {
4161                 if ((cl = changelist_gather(zhp, ZFS_PROP_NAME, 0,
4162                     force_unmount ? MS_FORCE : 0)) == NULL)
4163                         return (-1);
4164 
4165                 if (changelist_haszonedchild(cl)) {
4166                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4167                             "child dataset with inherited mountpoint is used "
4168                             "in a non-global zone"));
4169                         (void) zfs_error(hdl, EZFS_ZONED, errbuf);
4170                         ret = -1;
4171                         goto error;
4172                 }
4173 
4174                 if ((ret = changelist_prefix(cl)) != 0)
4175                         goto error;
4176         }
4177 
4178         if (ZFS_IS_VOLUME(zhp))
4179                 zc.zc_objset_type = DMU_OST_ZVOL;
4180         else
4181                 zc.zc_objset_type = DMU_OST_ZFS;
4182 
4183         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
4184         (void) strlcpy(zc.zc_value, target, sizeof (zc.zc_value));
4185 
4186         zc.zc_cookie = recursive;
4187 
4188         if ((ret = zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_RENAME, &zc)) != 0) {
4189                 /*
4190                  * if it was recursive, the one that actually failed will
4191                  * be in zc.zc_name
4192                  */
4193                 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
4194                     "cannot rename '%s'"), zc.zc_name);
4195 
4196                 if (recursive && errno == EEXIST) {
4197                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4198                             "a child dataset already has a snapshot "
4199                             "with the new name"));
4200                         (void) zfs_error(hdl, EZFS_EXISTS, errbuf);
4201                 } else {
4202                         (void) zfs_standard_error(zhp->zfs_hdl, errno, errbuf);
4203                 }
4204 
4205                 /*
4206                  * On failure, we still want to remount any filesystems that
4207                  * were previously mounted, so we don't alter the system state.
4208                  */
4209                 if (cl != NULL)
4210                         (void) changelist_postfix(cl);
4211         } else {
4212                 if (cl != NULL) {
4213                         changelist_rename(cl, zfs_get_name(zhp), target);
4214                         ret = changelist_postfix(cl);
4215                 }
4216         }
4217 
4218 error:
4219         if (parentname != NULL) {
4220                 free(parentname);
4221         }
4222         if (zhrp != NULL) {
4223                 zfs_close(zhrp);
4224         }
4225         if (cl != NULL) {
4226                 changelist_free(cl);
4227         }
4228         return (ret);
4229 }
4230 
4231 nvlist_t *
4232 zfs_get_user_props(zfs_handle_t *zhp)
4233 {
4234         return (zhp->zfs_user_props);
4235 }
4236 
4237 nvlist_t *
4238 zfs_get_recvd_props(zfs_handle_t *zhp)
4239 {
4240         if (zhp->zfs_recvd_props == NULL)
4241                 if (get_recvd_props_ioctl(zhp) != 0)
4242                         return (NULL);
4243         return (zhp->zfs_recvd_props);
4244 }
4245 
4246 /*
4247  * This function is used by 'zfs list' to determine the exact set of columns to
4248  * display, and their maximum widths.  This does two main things:
4249  *
4250  *      - If this is a list of all properties, then expand the list to include
4251  *        all native properties, and set a flag so that for each dataset we look
4252  *        for new unique user properties and add them to the list.
4253  *
4254  *      - For non fixed-width properties, keep track of the maximum width seen
4255  *        so that we can size the column appropriately. If the user has
4256  *        requested received property values, we also need to compute the width
4257  *        of the RECEIVED column.
4258  */
4259 int
4260 zfs_expand_proplist(zfs_handle_t *zhp, zprop_list_t **plp, boolean_t received,
4261     boolean_t literal)
4262 {
4263         libzfs_handle_t *hdl = zhp->zfs_hdl;
4264         zprop_list_t *entry;
4265         zprop_list_t **last, **start;
4266         nvlist_t *userprops, *propval;
4267         nvpair_t *elem;
4268         char *strval;
4269         char buf[ZFS_MAXPROPLEN];
4270 
4271         if (zprop_expand_list(hdl, plp, ZFS_TYPE_DATASET) != 0)
4272                 return (-1);
4273 
4274         userprops = zfs_get_user_props(zhp);
4275 
4276         entry = *plp;
4277         if (entry->pl_all && nvlist_next_nvpair(userprops, NULL) != NULL) {
4278                 /*
4279                  * Go through and add any user properties as necessary.  We
4280                  * start by incrementing our list pointer to the first
4281                  * non-native property.
4282                  */
4283                 start = plp;
4284                 while (*start != NULL) {
4285                         if ((*start)->pl_prop == ZPROP_INVAL)
4286                                 break;
4287                         start = &(*start)->pl_next;
4288                 }
4289 
4290                 elem = NULL;
4291                 while ((elem = nvlist_next_nvpair(userprops, elem)) != NULL) {
4292                         /*
4293                          * See if we've already found this property in our list.
4294                          */
4295                         for (last = start; *last != NULL;
4296                             last = &(*last)->pl_next) {
4297                                 if (strcmp((*last)->pl_user_prop,
4298                                     nvpair_name(elem)) == 0)
4299                                         break;
4300                         }
4301 
4302                         if (*last == NULL) {
4303                                 if ((entry = zfs_alloc(hdl,
4304                                     sizeof (zprop_list_t))) == NULL ||
4305                                     ((entry->pl_user_prop = zfs_strdup(hdl,
4306                                     nvpair_name(elem)))) == NULL) {
4307                                         free(entry);
4308                                         return (-1);
4309                                 }
4310 
4311                                 entry->pl_prop = ZPROP_INVAL;
4312                                 entry->pl_width = strlen(nvpair_name(elem));
4313                                 entry->pl_all = B_TRUE;
4314                                 *last = entry;
4315                         }
4316                 }
4317         }
4318 
4319         /*
4320          * Now go through and check the width of any non-fixed columns
4321          */
4322         for (entry = *plp; entry != NULL; entry = entry->pl_next) {
4323                 if (entry->pl_fixed && !literal)
4324                         continue;
4325 
4326                 if (entry->pl_prop != ZPROP_INVAL) {
4327                         if (zfs_prop_get(zhp, entry->pl_prop,
4328                             buf, sizeof (buf), NULL, NULL, 0, literal) == 0) {
4329                                 if (strlen(buf) > entry->pl_width)
4330                                         entry->pl_width = strlen(buf);
4331                         }
4332                         if (received && zfs_prop_get_recvd(zhp,
4333                             zfs_prop_to_name(entry->pl_prop),
4334                             buf, sizeof (buf), literal) == 0)
4335                                 if (strlen(buf) > entry->pl_recvd_width)
4336                                         entry->pl_recvd_width = strlen(buf);
4337                 } else {
4338                         if (nvlist_lookup_nvlist(userprops, entry->pl_user_prop,
4339                             &propval) == 0) {
4340                                 verify(nvlist_lookup_string(propval,
4341                                     ZPROP_VALUE, &strval) == 0);
4342                                 if (strlen(strval) > entry->pl_width)
4343                                         entry->pl_width = strlen(strval);
4344                         }
4345                         if (received && zfs_prop_get_recvd(zhp,
4346                             entry->pl_user_prop,
4347                             buf, sizeof (buf), literal) == 0)
4348                                 if (strlen(buf) > entry->pl_recvd_width)
4349                                         entry->pl_recvd_width = strlen(buf);
4350                 }
4351         }
4352 
4353         return (0);
4354 }
4355 
4356 int
4357 zfs_deleg_share_nfs(libzfs_handle_t *hdl, char *dataset, char *path,
4358     char *resource, void *export, void *sharetab,
4359     int sharemax, zfs_share_op_t operation)
4360 {
4361         zfs_cmd_t zc = { 0 };
4362         int error;
4363 
4364         (void) strlcpy(zc.zc_name, dataset, sizeof (zc.zc_name));
4365         (void) strlcpy(zc.zc_value, path, sizeof (zc.zc_value));
4366         if (resource)
4367                 (void) strlcpy(zc.zc_string, resource, sizeof (zc.zc_string));
4368         zc.zc_share.z_sharedata = (uint64_t)(uintptr_t)sharetab;
4369         zc.zc_share.z_exportdata = (uint64_t)(uintptr_t)export;
4370         zc.zc_share.z_sharetype = operation;
4371         zc.zc_share.z_sharemax = sharemax;
4372         error = ioctl(hdl->libzfs_fd, ZFS_IOC_SHARE, &zc);
4373         return (error);
4374 }
4375 
4376 void
4377 zfs_prune_proplist(zfs_handle_t *zhp, uint8_t *props)
4378 {
4379         nvpair_t *curr;
4380 
4381         /*
4382          * Keep a reference to the props-table against which we prune the
4383          * properties.
4384          */
4385         zhp->zfs_props_table = props;
4386 
4387         curr = nvlist_next_nvpair(zhp->zfs_props, NULL);
4388 
4389         while (curr) {
4390                 zfs_prop_t zfs_prop = zfs_name_to_prop(nvpair_name(curr));
4391                 nvpair_t *next = nvlist_next_nvpair(zhp->zfs_props, curr);
4392 
4393                 /*
4394                  * User properties will result in ZPROP_INVAL, and since we
4395                  * only know how to prune standard ZFS properties, we always
4396                  * leave these in the list.  This can also happen if we
4397                  * encounter an unknown DSL property (when running older
4398                  * software, for example).
4399                  */
4400                 if (zfs_prop != ZPROP_INVAL && props[zfs_prop] == B_FALSE)
4401                         (void) nvlist_remove(zhp->zfs_props,
4402                             nvpair_name(curr), nvpair_type(curr));
4403                 curr = next;
4404         }
4405 }
4406 
4407 static int
4408 zfs_smb_acl_mgmt(libzfs_handle_t *hdl, char *dataset, char *path,
4409     zfs_smb_acl_op_t cmd, char *resource1, char *resource2)
4410 {
4411         zfs_cmd_t zc = { 0 };
4412         nvlist_t *nvlist = NULL;
4413         int error;
4414 
4415         (void) strlcpy(zc.zc_name, dataset, sizeof (zc.zc_name));
4416         (void) strlcpy(zc.zc_value, path, sizeof (zc.zc_value));
4417         zc.zc_cookie = (uint64_t)cmd;
4418 
4419         if (cmd == ZFS_SMB_ACL_RENAME) {
4420                 if (nvlist_alloc(&nvlist, NV_UNIQUE_NAME, 0) != 0) {
4421                         (void) no_memory(hdl);
4422                         return (0);
4423                 }
4424         }
4425 
4426         switch (cmd) {
4427         case ZFS_SMB_ACL_ADD:
4428         case ZFS_SMB_ACL_REMOVE:
4429                 (void) strlcpy(zc.zc_string, resource1, sizeof (zc.zc_string));
4430                 break;
4431         case ZFS_SMB_ACL_RENAME:
4432                 if (nvlist_add_string(nvlist, ZFS_SMB_ACL_SRC,
4433                     resource1) != 0) {
4434                                 (void) no_memory(hdl);
4435                                 return (-1);
4436                 }
4437                 if (nvlist_add_string(nvlist, ZFS_SMB_ACL_TARGET,
4438                     resource2) != 0) {
4439                                 (void) no_memory(hdl);
4440                                 return (-1);
4441                 }
4442                 if (zcmd_write_src_nvlist(hdl, &zc, nvlist) != 0) {
4443                         nvlist_free(nvlist);
4444                         return (-1);
4445                 }
4446                 break;
4447         case ZFS_SMB_ACL_PURGE:
4448                 break;
4449         default:
4450                 return (-1);
4451         }
4452         error = ioctl(hdl->libzfs_fd, ZFS_IOC_SMB_ACL, &zc);
4453         nvlist_free(nvlist);
4454         return (error);
4455 }
4456 
4457 int
4458 zfs_smb_acl_add(libzfs_handle_t *hdl, char *dataset,
4459     char *path, char *resource)
4460 {
4461         return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_ADD,
4462             resource, NULL));
4463 }
4464 
4465 int
4466 zfs_smb_acl_remove(libzfs_handle_t *hdl, char *dataset,
4467     char *path, char *resource)
4468 {
4469         return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_REMOVE,
4470             resource, NULL));
4471 }
4472 
4473 int
4474 zfs_smb_acl_purge(libzfs_handle_t *hdl, char *dataset, char *path)
4475 {
4476         return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_PURGE,
4477             NULL, NULL));
4478 }
4479 
4480 int
4481 zfs_smb_acl_rename(libzfs_handle_t *hdl, char *dataset, char *path,
4482     char *oldname, char *newname)
4483 {
4484         return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_RENAME,
4485             oldname, newname));
4486 }
4487 
4488 int
4489 zfs_userspace(zfs_handle_t *zhp, zfs_userquota_prop_t type,
4490     zfs_userspace_cb_t func, void *arg)
4491 {
4492         zfs_cmd_t zc = { 0 };
4493         zfs_useracct_t buf[100];
4494         libzfs_handle_t *hdl = zhp->zfs_hdl;
4495         int ret;
4496 
4497         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
4498 
4499         zc.zc_objset_type = type;
4500         zc.zc_nvlist_dst = (uintptr_t)buf;
4501 
4502         for (;;) {
4503                 zfs_useracct_t *zua = buf;
4504 
4505                 zc.zc_nvlist_dst_size = sizeof (buf);
4506                 if (zfs_ioctl(hdl, ZFS_IOC_USERSPACE_MANY, &zc) != 0) {
4507                         char errbuf[1024];
4508 
4509                         (void) snprintf(errbuf, sizeof (errbuf),
4510                             dgettext(TEXT_DOMAIN,
4511                             "cannot get used/quota for %s"), zc.zc_name);
4512                         return (zfs_standard_error_fmt(hdl, errno, errbuf));
4513                 }
4514                 if (zc.zc_nvlist_dst_size == 0)
4515                         break;
4516 
4517                 while (zc.zc_nvlist_dst_size > 0) {
4518                         if ((ret = func(arg, zua->zu_domain, zua->zu_rid,
4519                             zua->zu_space)) != 0)
4520                                 return (ret);
4521                         zua++;
4522                         zc.zc_nvlist_dst_size -= sizeof (zfs_useracct_t);
4523                 }
4524         }
4525 
4526         return (0);
4527 }
4528 
4529 struct holdarg {
4530         nvlist_t *nvl;
4531         const char *snapname;
4532         const char *tag;
4533         boolean_t recursive;
4534         int error;
4535 };
4536 
4537 static int
4538 zfs_hold_one(zfs_handle_t *zhp, void *arg)
4539 {
4540         struct holdarg *ha = arg;
4541         char name[ZFS_MAX_DATASET_NAME_LEN];
4542         int rv = 0;
4543 
4544         (void) snprintf(name, sizeof (name),
4545             "%s@%s", zhp->zfs_name, ha->snapname);
4546 
4547         if (lzc_exists(name))
4548                 fnvlist_add_string(ha->nvl, name, ha->tag);
4549 
4550         if (ha->recursive)
4551                 rv = zfs_iter_filesystems(zhp, zfs_hold_one, ha);
4552         zfs_close(zhp);
4553         return (rv);
4554 }
4555 
4556 int
4557 zfs_hold(zfs_handle_t *zhp, const char *snapname, const char *tag,
4558     boolean_t recursive, int cleanup_fd)
4559 {
4560         int ret;
4561         struct holdarg ha;
4562 
4563         ha.nvl = fnvlist_alloc();
4564         ha.snapname = snapname;
4565         ha.tag = tag;
4566         ha.recursive = recursive;
4567         (void) zfs_hold_one(zfs_handle_dup(zhp), &ha);
4568 
4569         if (nvlist_empty(ha.nvl)) {
4570                 char errbuf[1024];
4571 
4572                 fnvlist_free(ha.nvl);
4573                 ret = ENOENT;
4574                 (void) snprintf(errbuf, sizeof (errbuf),
4575                     dgettext(TEXT_DOMAIN,
4576                     "cannot hold snapshot '%s@%s'"),
4577                     zhp->zfs_name, snapname);
4578                 (void) zfs_standard_error(zhp->zfs_hdl, ret, errbuf);
4579                 return (ret);
4580         }
4581 
4582         ret = zfs_hold_nvl(zhp, cleanup_fd, ha.nvl);
4583         fnvlist_free(ha.nvl);
4584 
4585         return (ret);
4586 }
4587 
4588 int
4589 zfs_hold_nvl(zfs_handle_t *zhp, int cleanup_fd, nvlist_t *holds)
4590 {
4591         int ret;
4592         nvlist_t *errors;
4593         libzfs_handle_t *hdl = zhp->zfs_hdl;
4594         char errbuf[1024];
4595         nvpair_t *elem;
4596 
4597         errors = NULL;
4598         ret = lzc_hold(holds, cleanup_fd, &errors);
4599 
4600         if (ret == 0) {
4601                 /* There may be errors even in the success case. */
4602                 fnvlist_free(errors);
4603                 return (0);
4604         }
4605 
4606         if (nvlist_empty(errors)) {
4607                 /* no hold-specific errors */
4608                 (void) snprintf(errbuf, sizeof (errbuf),
4609                     dgettext(TEXT_DOMAIN, "cannot hold"));
4610                 switch (ret) {
4611                 case ENOTSUP:
4612                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4613                             "pool must be upgraded"));
4614                         (void) zfs_error(hdl, EZFS_BADVERSION, errbuf);
4615                         break;
4616                 case EINVAL:
4617                         (void) zfs_error(hdl, EZFS_BADTYPE, errbuf);
4618                         break;
4619                 default:
4620                         (void) zfs_standard_error(hdl, ret, errbuf);
4621                 }
4622         }
4623 
4624         for (elem = nvlist_next_nvpair(errors, NULL);
4625             elem != NULL;
4626             elem = nvlist_next_nvpair(errors, elem)) {
4627                 (void) snprintf(errbuf, sizeof (errbuf),
4628                     dgettext(TEXT_DOMAIN,
4629                     "cannot hold snapshot '%s'"), nvpair_name(elem));
4630                 switch (fnvpair_value_int32(elem)) {
4631                 case E2BIG:
4632                         /*
4633                          * Temporary tags wind up having the ds object id
4634                          * prepended. So even if we passed the length check
4635                          * above, it's still possible for the tag to wind
4636                          * up being slightly too long.
4637                          */
4638                         (void) zfs_error(hdl, EZFS_TAGTOOLONG, errbuf);
4639                         break;
4640                 case EINVAL:
4641                         (void) zfs_error(hdl, EZFS_BADTYPE, errbuf);
4642                         break;
4643                 case EEXIST:
4644                         (void) zfs_error(hdl, EZFS_REFTAG_HOLD, errbuf);
4645                         break;
4646                 default:
4647                         (void) zfs_standard_error(hdl,
4648                             fnvpair_value_int32(elem), errbuf);
4649                 }
4650         }
4651 
4652         fnvlist_free(errors);
4653         return (ret);
4654 }
4655 
4656 static int
4657 zfs_release_one(zfs_handle_t *zhp, void *arg)
4658 {
4659         struct holdarg *ha = arg;
4660         char name[ZFS_MAX_DATASET_NAME_LEN];
4661         int rv = 0;
4662         nvlist_t *existing_holds;
4663 
4664         (void) snprintf(name, sizeof (name),
4665             "%s@%s", zhp->zfs_name, ha->snapname);
4666 
4667         if (lzc_get_holds(name, &existing_holds) != 0) {
4668                 ha->error = ENOENT;
4669         } else if (!nvlist_exists(existing_holds, ha->tag)) {
4670                 ha->error = ESRCH;
4671         } else {
4672                 nvlist_t *torelease = fnvlist_alloc();
4673                 fnvlist_add_boolean(torelease, ha->tag);
4674                 fnvlist_add_nvlist(ha->nvl, name, torelease);
4675                 fnvlist_free(torelease);
4676         }
4677 
4678         if (ha->recursive)
4679                 rv = zfs_iter_filesystems(zhp, zfs_release_one, ha);
4680         zfs_close(zhp);
4681         return (rv);
4682 }
4683 
4684 int
4685 zfs_release(zfs_handle_t *zhp, const char *snapname, const char *tag,
4686     boolean_t recursive)
4687 {
4688         int ret;
4689         struct holdarg ha;
4690         nvlist_t *errors = NULL;
4691         nvpair_t *elem;
4692         libzfs_handle_t *hdl = zhp->zfs_hdl;
4693         char errbuf[1024];
4694 
4695         ha.nvl = fnvlist_alloc();
4696         ha.snapname = snapname;
4697         ha.tag = tag;
4698         ha.recursive = recursive;
4699         ha.error = 0;
4700         (void) zfs_release_one(zfs_handle_dup(zhp), &ha);
4701 
4702         if (nvlist_empty(ha.nvl)) {
4703                 fnvlist_free(ha.nvl);
4704                 ret = ha.error;
4705                 (void) snprintf(errbuf, sizeof (errbuf),
4706                     dgettext(TEXT_DOMAIN,
4707                     "cannot release hold from snapshot '%s@%s'"),
4708                     zhp->zfs_name, snapname);
4709                 if (ret == ESRCH) {
4710                         (void) zfs_error(hdl, EZFS_REFTAG_RELE, errbuf);
4711                 } else {
4712                         (void) zfs_standard_error(hdl, ret, errbuf);
4713                 }
4714                 return (ret);
4715         }
4716 
4717         ret = lzc_release(ha.nvl, &errors);
4718         fnvlist_free(ha.nvl);
4719 
4720         if (ret == 0) {
4721                 /* There may be errors even in the success case. */
4722                 fnvlist_free(errors);
4723                 return (0);
4724         }
4725 
4726         if (nvlist_empty(errors)) {
4727                 /* no hold-specific errors */
4728                 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
4729                     "cannot release"));
4730                 switch (errno) {
4731                 case ENOTSUP:
4732                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4733                             "pool must be upgraded"));
4734                         (void) zfs_error(hdl, EZFS_BADVERSION, errbuf);
4735                         break;
4736                 default:
4737                         (void) zfs_standard_error_fmt(hdl, errno, errbuf);
4738                 }
4739         }
4740 
4741         for (elem = nvlist_next_nvpair(errors, NULL);
4742             elem != NULL;
4743             elem = nvlist_next_nvpair(errors, elem)) {
4744                 (void) snprintf(errbuf, sizeof (errbuf),
4745                     dgettext(TEXT_DOMAIN,
4746                     "cannot release hold from snapshot '%s'"),
4747                     nvpair_name(elem));
4748                 switch (fnvpair_value_int32(elem)) {
4749                 case ESRCH:
4750                         (void) zfs_error(hdl, EZFS_REFTAG_RELE, errbuf);
4751                         break;
4752                 case EINVAL:
4753                         (void) zfs_error(hdl, EZFS_BADTYPE, errbuf);
4754                         break;
4755                 default:
4756                         (void) zfs_standard_error_fmt(hdl,
4757                             fnvpair_value_int32(elem), errbuf);
4758                 }
4759         }
4760 
4761         fnvlist_free(errors);
4762         return (ret);
4763 }
4764 
4765 int
4766 zfs_get_fsacl(zfs_handle_t *zhp, nvlist_t **nvl)
4767 {
4768         zfs_cmd_t zc = { 0 };
4769         libzfs_handle_t *hdl = zhp->zfs_hdl;
4770         int nvsz = 2048;
4771         void *nvbuf;
4772         int err = 0;
4773         char errbuf[1024];
4774 
4775         assert(zhp->zfs_type == ZFS_TYPE_VOLUME ||
4776             zhp->zfs_type == ZFS_TYPE_FILESYSTEM);
4777 
4778 tryagain:
4779 
4780         nvbuf = malloc(nvsz);
4781         if (nvbuf == NULL) {
4782                 err = (zfs_error(hdl, EZFS_NOMEM, strerror(errno)));
4783                 goto out;
4784         }
4785 
4786         zc.zc_nvlist_dst_size = nvsz;
4787         zc.zc_nvlist_dst = (uintptr_t)nvbuf;
4788 
4789         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
4790 
4791         if (ioctl(hdl->libzfs_fd, ZFS_IOC_GET_FSACL, &zc) != 0) {
4792                 (void) snprintf(errbuf, sizeof (errbuf),
4793                     dgettext(TEXT_DOMAIN, "cannot get permissions on '%s'"),
4794                     zc.zc_name);
4795                 switch (errno) {
4796                 case ENOMEM:
4797                         free(nvbuf);
4798                         nvsz = zc.zc_nvlist_dst_size;
4799                         goto tryagain;
4800 
4801                 case ENOTSUP:
4802                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4803                             "pool must be upgraded"));
4804                         err = zfs_error(hdl, EZFS_BADVERSION, errbuf);
4805                         break;
4806                 case EINVAL:
4807                         err = zfs_error(hdl, EZFS_BADTYPE, errbuf);
4808                         break;
4809                 case ENOENT:
4810                         err = zfs_error(hdl, EZFS_NOENT, errbuf);
4811                         break;
4812                 default:
4813                         err = zfs_standard_error_fmt(hdl, errno, errbuf);
4814                         break;
4815                 }
4816         } else {
4817                 /* success */
4818                 int rc = nvlist_unpack(nvbuf, zc.zc_nvlist_dst_size, nvl, 0);
4819                 if (rc) {
4820                         (void) snprintf(errbuf, sizeof (errbuf), dgettext(
4821                             TEXT_DOMAIN, "cannot get permissions on '%s'"),
4822                             zc.zc_name);
4823                         err = zfs_standard_error_fmt(hdl, rc, errbuf);
4824                 }
4825         }
4826 
4827         free(nvbuf);
4828 out:
4829         return (err);
4830 }
4831 
4832 int
4833 zfs_set_fsacl(zfs_handle_t *zhp, boolean_t un, nvlist_t *nvl)
4834 {
4835         zfs_cmd_t zc = { 0 };
4836         libzfs_handle_t *hdl = zhp->zfs_hdl;
4837         char *nvbuf;
4838         char errbuf[1024];
4839         size_t nvsz;
4840         int err;
4841 
4842         assert(zhp->zfs_type == ZFS_TYPE_VOLUME ||
4843             zhp->zfs_type == ZFS_TYPE_FILESYSTEM);
4844 
4845         err = nvlist_size(nvl, &nvsz, NV_ENCODE_NATIVE);
4846         assert(err == 0);
4847 
4848         nvbuf = malloc(nvsz);
4849 
4850         err = nvlist_pack(nvl, &nvbuf, &nvsz, NV_ENCODE_NATIVE, 0);
4851         assert(err == 0);
4852 
4853         zc.zc_nvlist_src_size = nvsz;
4854         zc.zc_nvlist_src = (uintptr_t)nvbuf;
4855         zc.zc_perm_action = un;
4856 
4857         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
4858 
4859         if (zfs_ioctl(hdl, ZFS_IOC_SET_FSACL, &zc) != 0) {
4860                 (void) snprintf(errbuf, sizeof (errbuf),
4861                     dgettext(TEXT_DOMAIN, "cannot set permissions on '%s'"),
4862                     zc.zc_name);
4863                 switch (errno) {
4864                 case ENOTSUP:
4865                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4866                             "pool must be upgraded"));
4867                         err = zfs_error(hdl, EZFS_BADVERSION, errbuf);
4868                         break;
4869                 case EINVAL:
4870                         err = zfs_error(hdl, EZFS_BADTYPE, errbuf);
4871                         break;
4872                 case ENOENT:
4873                         err = zfs_error(hdl, EZFS_NOENT, errbuf);
4874                         break;
4875                 default:
4876                         err = zfs_standard_error_fmt(hdl, errno, errbuf);
4877                         break;
4878                 }
4879         }
4880 
4881         free(nvbuf);
4882 
4883         return (err);
4884 }
4885 
4886 int
4887 zfs_get_holds(zfs_handle_t *zhp, nvlist_t **nvl)
4888 {
4889         int err;
4890         char errbuf[1024];
4891 
4892         err = lzc_get_holds(zhp->zfs_name, nvl);
4893 
4894         if (err != 0) {
4895                 libzfs_handle_t *hdl = zhp->zfs_hdl;
4896 
4897                 (void) snprintf(errbuf, sizeof (errbuf),
4898                     dgettext(TEXT_DOMAIN, "cannot get holds for '%s'"),
4899                     zhp->zfs_name);
4900                 switch (err) {
4901                 case ENOTSUP:
4902                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4903                             "pool must be upgraded"));
4904                         err = zfs_error(hdl, EZFS_BADVERSION, errbuf);
4905                         break;
4906                 case EINVAL:
4907                         err = zfs_error(hdl, EZFS_BADTYPE, errbuf);
4908                         break;
4909                 case ENOENT:
4910                         err = zfs_error(hdl, EZFS_NOENT, errbuf);
4911                         break;
4912                 default:
4913                         err = zfs_standard_error_fmt(hdl, errno, errbuf);
4914                         break;
4915                 }
4916         }
4917 
4918         return (err);
4919 }
4920 
4921 /*
4922  * Convert the zvol's volume size to an appropriate reservation.
4923  * Note: If this routine is updated, it is necessary to update the ZFS test
4924  * suite's shell version in reservation.kshlib.
4925  */
4926 uint64_t
4927 zvol_volsize_to_reservation(uint64_t volsize, nvlist_t *props)
4928 {
4929         uint64_t numdb;
4930         uint64_t nblocks, volblocksize;
4931         int ncopies;
4932         char *strval;
4933 
4934         if (nvlist_lookup_string(props,
4935             zfs_prop_to_name(ZFS_PROP_COPIES), &strval) == 0)
4936                 ncopies = atoi(strval);
4937         else
4938                 ncopies = 1;
4939         if (nvlist_lookup_uint64(props,
4940             zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE),
4941             &volblocksize) != 0)
4942                 volblocksize = ZVOL_DEFAULT_BLOCKSIZE;
4943         nblocks = volsize/volblocksize;
4944         /* start with metadnode L0-L6 */
4945         numdb = 7;
4946         /* calculate number of indirects */
4947         while (nblocks > 1) {
4948                 nblocks += DNODES_PER_LEVEL - 1;
4949                 nblocks /= DNODES_PER_LEVEL;
4950                 numdb += nblocks;
4951         }
4952         numdb *= MIN(SPA_DVAS_PER_BP, ncopies + 1);
4953         volsize *= ncopies;
4954         /*
4955          * this is exactly DN_MAX_INDBLKSHIFT when metadata isn't
4956          * compressed, but in practice they compress down to about
4957          * 1100 bytes
4958          */
4959         numdb *= 1ULL << DN_MAX_INDBLKSHIFT;
4960         volsize += numdb;
4961         return (volsize);
4962 }
--- EOF ---