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

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