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 2016 Nexenta Systems, Inc.
  32  * Copyright 2016 Igor Kozhukhov <ikozhukhov@gmail.com>
  33  * Copyright 2017 RackTop Systems.
  34  */
  35
  36 #include <ctype.h>
  37 #include <errno.h>
  38 #include <libintl.h>
  39 #include <math.h>
  40 #include <stdio.h>
  41 #include <stdlib.h>
  42 #include <strings.h>
  43 #include <unistd.h>
  44 #include <stddef.h>
  45 #include <zone.h>
  46 #include <fcntl.h>
  47 #include <sys/mntent.h>
  48 #include <sys/mount.h>
  49 #include <priv.h>
  50 #include <pwd.h>
  51 #include <grp.h>
  52 #include <stddef.h>
  53 #include <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.
2165                          */
2166                         if (zfs_prop_readonly(prop) &&
2167                             *source != NULL && (*source)[0] == '\0') {
2168                                 *source = NULL;
2169                                 return (-1);
2170                         }
2171                         break;
2172
2173                 case PROP_TYPE_STRING:
2174                 default:
2175                         zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN,
2176                             "cannot get non-numeric property"));
2177                         return (zfs_error(zhp->zfs_hdl, EZFS_BADPROP,
2178                             dgettext(TEXT_DOMAIN, "internal error")));
2179                 }
2180         }
2181
2182         return (0);
2183 }
2184
2185 /*
2186  * Calculate the source type, given the raw source string.
2187  */
2188 static void
2189 get_source(zfs_handle_t *zhp, zprop_source_t *srctype, char *source,
2190     char *statbuf, size_t statlen)
2191 {
2192         if (statbuf == NULL || *srctype == ZPROP_SRC_TEMPORARY)
2193                 return;
2194
2195         if (source == NULL) {
2196                 *srctype = ZPROP_SRC_NONE;
2197         } else if (source[0] == '\0') {
2198                 *srctype = ZPROP_SRC_DEFAULT;
2199         } else if (strstr(source, ZPROP_SOURCE_VAL_RECVD) != NULL) {
2200                 *srctype = ZPROP_SRC_RECEIVED;
2201         } else {
2202                 if (strcmp(source, zhp->zfs_name) == 0) {
2203                         *srctype = ZPROP_SRC_LOCAL;
2204                 } else {
2205                         (void) strlcpy(statbuf, source, statlen);
2206                         *srctype = ZPROP_SRC_INHERITED;
2207                 }
2208         }
2209
2210 }
2211
2212 int
2213 zfs_prop_get_recvd(zfs_handle_t *zhp, const char *propname, char *propbuf,
2214     size_t proplen, boolean_t literal)
2215 {
2216         zfs_prop_t prop;
2217         int err = 0;
2218
2219         if (zhp->zfs_recvd_props == NULL)
2220                 if (get_recvd_props_ioctl(zhp) != 0)
2221                         return (-1);
2222
2223         prop = zfs_name_to_prop(propname);
2224
2225         if (prop != ZPROP_INVAL) {
2226                 uint64_t cookie;
2227                 if (!nvlist_exists(zhp->zfs_recvd_props, propname))
2228                         return (-1);
2229                 zfs_set_recvd_props_mode(zhp, &cookie);
2230                 err = zfs_prop_get(zhp, prop, propbuf, proplen,
2231                     NULL, NULL, 0, literal);
2232                 zfs_unset_recvd_props_mode(zhp, &cookie);
2233         } else {
2234                 nvlist_t *propval;
2235                 char *recvdval;
2236                 if (nvlist_lookup_nvlist(zhp->zfs_recvd_props,
2237                     propname, &propval) != 0)
2238                         return (-1);
2239                 verify(nvlist_lookup_string(propval, ZPROP_VALUE,
2240                     &recvdval) == 0);
2241                 (void) strlcpy(propbuf, recvdval, proplen);
2242         }
2243
2244         return (err == 0 ? 0 : -1);
2245 }
2246
2247 static int
2248 get_clones_string(zfs_handle_t *zhp, char *propbuf, size_t proplen)
2249 {
2250         nvlist_t *value;
2251         nvpair_t *pair;
2252
2253         value = zfs_get_clones_nvl(zhp);
2254         if (value == NULL)
2255                 return (-1);
2256
2257         propbuf[0] = '\0';
2258         for (pair = nvlist_next_nvpair(value, NULL); pair != NULL;
2259             pair = nvlist_next_nvpair(value, pair)) {
2260                 if (propbuf[0] != '\0')
2261                         (void) strlcat(propbuf, ",", proplen);
2262                 (void) strlcat(propbuf, nvpair_name(pair), proplen);
2263         }
2264
2265         return (0);
2266 }
2267
2268 struct get_clones_arg {
2269         uint64_t numclones;
2270         nvlist_t *value;
2271         const char *origin;
2272         char buf[ZFS_MAX_DATASET_NAME_LEN];
2273 };
2274
2275 int
2276 get_clones_cb(zfs_handle_t *zhp, void *arg)
2277 {
2278         struct get_clones_arg *gca = arg;
2279
2280         if (gca->numclones == 0) {
2281                 zfs_close(zhp);
2282                 return (0);
2283         }
2284
2285         if (zfs_prop_get(zhp, ZFS_PROP_ORIGIN, gca->buf, sizeof (gca->buf),
2286             NULL, NULL, 0, B_TRUE) != 0)
2287                 goto out;
2288         if (strcmp(gca->buf, gca->origin) == 0) {
2289                 fnvlist_add_boolean(gca->value, zfs_get_name(zhp));
2290                 gca->numclones--;
2291         }
2292
2293 out:
2294         (void) zfs_iter_children(zhp, get_clones_cb, gca);
2295         zfs_close(zhp);
2296         return (0);
2297 }
2298
2299 nvlist_t *
2300 zfs_get_clones_nvl(zfs_handle_t *zhp)
2301 {
2302         nvlist_t *nv, *value;
2303
2304         if (nvlist_lookup_nvlist(zhp->zfs_props,
2305             zfs_prop_to_name(ZFS_PROP_CLONES), &nv) != 0) {
2306                 struct get_clones_arg gca;
2307
2308                 /*
2309                  * if this is a snapshot, then the kernel wasn't able
2310                  * to get the clones.  Do it by slowly iterating.
2311                  */
2312                 if (zhp->zfs_type != ZFS_TYPE_SNAPSHOT)
2313                         return (NULL);
2314                 if (nvlist_alloc(&nv, NV_UNIQUE_NAME, 0) != 0)
2315                         return (NULL);
2316                 if (nvlist_alloc(&value, NV_UNIQUE_NAME, 0) != 0) {
2317                         nvlist_free(nv);
2318                         return (NULL);
2319                 }
2320
2321                 gca.numclones = zfs_prop_get_int(zhp, ZFS_PROP_NUMCLONES);
2322                 gca.value = value;
2323                 gca.origin = zhp->zfs_name;
2324
2325                 if (gca.numclones != 0) {
2326                         zfs_handle_t *root;
2327                         char pool[ZFS_MAX_DATASET_NAME_LEN];
2328                         char *cp = pool;
2329
2330                         /* get the pool name */
2331                         (void) strlcpy(pool, zhp->zfs_name, sizeof (pool));
2332                         (void) strsep(&cp, "/@");
2333                         root = zfs_open(zhp->zfs_hdl, pool,
2334                             ZFS_TYPE_FILESYSTEM);
2335
2336                         (void) get_clones_cb(root, &gca);
2337                 }
2338
2339                 if (gca.numclones != 0 ||
2340                     nvlist_add_nvlist(nv, ZPROP_VALUE, value) != 0 ||
2341                     nvlist_add_nvlist(zhp->zfs_props,
2342                     zfs_prop_to_name(ZFS_PROP_CLONES), nv) != 0) {
2343                         nvlist_free(nv);
2344                         nvlist_free(value);
2345                         return (NULL);
2346                 }
2347                 nvlist_free(nv);
2348                 nvlist_free(value);
2349                 verify(0 == nvlist_lookup_nvlist(zhp->zfs_props,
2350                     zfs_prop_to_name(ZFS_PROP_CLONES), &nv));
2351         }
2352
2353         verify(nvlist_lookup_nvlist(nv, ZPROP_VALUE, &value) == 0);
2354
2355         return (value);
2356 }
2357
2358 /*
2359  * Accepts a property and value and checks that the value
2360  * matches the one found by the channel program. If they are
2361  * not equal, print both of them.
2362  */
2363 void
2364 zcp_check(zfs_handle_t *zhp, zfs_prop_t prop, uint64_t intval,
2365     const char *strval)
2366 {
2367         if (!zhp->zfs_hdl->libzfs_prop_debug)
2368                 return;
2369         int error;
2370         char *poolname = zhp->zpool_hdl->zpool_name;
2371         const char *program =
2372             "args = ...\n"
2373             "ds = args['dataset']\n"
2374             "prop = args['property']\n"
2375             "value, setpoint = zfs.get_prop(ds, prop)\n"
2376             "return {value=value, setpoint=setpoint}\n";
2377         nvlist_t *outnvl;
2378         nvlist_t *retnvl;
2379         nvlist_t *argnvl = fnvlist_alloc();
2380
2381         fnvlist_add_string(argnvl, "dataset", zhp->zfs_name);
2382         fnvlist_add_string(argnvl, "property", zfs_prop_to_name(prop));
2383
2384         error = lzc_channel_program(poolname, program,
2385             10 * 1000 * 1000, 10 * 1024 * 1024, argnvl, &outnvl);
2386
2387         if (error == 0) {
2388                 retnvl = fnvlist_lookup_nvlist(outnvl, "return");
2389                 if (zfs_prop_get_type(prop) == PROP_TYPE_NUMBER) {
2390                         int64_t ans;
2391                         error = nvlist_lookup_int64(retnvl, "value", &ans);
2392                         if (error != 0) {
2393                                 (void) fprintf(stderr, "zcp check error: %u\n",
2394                                     error);
2395                                 return;
2396                         }
2397                         if (ans != intval) {
2398                                 (void) fprintf(stderr,
2399                                     "%s: zfs found %lld, but zcp found %lld\n",
2400                                     zfs_prop_to_name(prop),
2401                                     (longlong_t)intval, (longlong_t)ans);
2402                         }
2403                 } else {
2404                         char *str_ans;
2405                         error = nvlist_lookup_string(retnvl, "value", &str_ans);
2406                         if (error != 0) {
2407                                 (void) fprintf(stderr, "zcp check error: %u\n",
2408                                     error);
2409                                 return;
2410                         }
2411                         if (strcmp(strval, str_ans) != 0) {
2412                                 (void) fprintf(stderr,
2413                                     "%s: zfs found %s, but zcp found %s\n",
2414                                     zfs_prop_to_name(prop),
2415                                     strval, str_ans);
2416                         }
2417                 }
2418         } else {
2419                 (void) fprintf(stderr,
2420                     "zcp check failed, channel program error: %u\n", error);
2421         }
2422         nvlist_free(argnvl);
2423         nvlist_free(outnvl);
2424 }
2425
2426 /*
2427  * Retrieve a property from the given object.  If 'literal' is specified, then
2428  * numbers are left as exact values.  Otherwise, numbers are converted to a
2429  * human-readable form.
2430  *
2431  * Returns 0 on success, or -1 on error.
2432  */
2433 int
2434 zfs_prop_get(zfs_handle_t *zhp, zfs_prop_t prop, char *propbuf, size_t proplen,
2435     zprop_source_t *src, char *statbuf, size_t statlen, boolean_t literal)
2436 {
2437         char *source = NULL;
2438         uint64_t val;
2439         const char *str;
2440         const char *strval;
2441         boolean_t received = zfs_is_recvd_props_mode(zhp);
2442
2443         /*
2444          * Check to see if this property applies to our object
2445          */
2446         if (!zfs_prop_valid_for_type(prop, zhp->zfs_type))
2447                 return (-1);
2448
2449         if (received && zfs_prop_readonly(prop))
2450                 return (-1);
2451
2452         if (src)
2453                 *src = ZPROP_SRC_NONE;
2454
2455         switch (prop) {
2456         case ZFS_PROP_CREATION:
2457                 /*
2458                  * 'creation' is a time_t stored in the statistics.  We convert
2459                  * this into a string unless 'literal' is specified.
2460                  */
2461                 {
2462                         val = getprop_uint64(zhp, prop, &source);
2463                         time_t time = (time_t)val;
2464                         struct tm t;
2465
2466                         if (literal ||
2467                             localtime_r(&time, &t) == NULL ||
2468                             strftime(propbuf, proplen, "%a %b %e %k:%M %Y",
2469                             &t) == 0)
2470                                 (void) snprintf(propbuf, proplen, "%llu", val);
2471                 }
2472                 zcp_check(zhp, prop, val, NULL);
2473                 break;
2474
2475         case ZFS_PROP_MOUNTPOINT:
2476                 /*
2477                  * Getting the precise mountpoint can be tricky.
2478                  *
2479                  *  - for 'none' or 'legacy', return those values.
2480                  *  - for inherited mountpoints, we want to take everything
2481                  *    after our ancestor and append it to the inherited value.
2482                  *
2483                  * If the pool has an alternate root, we want to prepend that
2484                  * root to any values we return.
2485                  */
2486
2487                 str = getprop_string(zhp, prop, &source);
2488
2489                 if (str[0] == '/') {
2490                         char buf[MAXPATHLEN];
2491                         char *root = buf;
2492                         const char *relpath;
2493
2494                         /*
2495                          * If we inherit the mountpoint, even from a dataset
2496                          * with a received value, the source will be the path of
2497                          * the dataset we inherit from. If source is
2498                          * ZPROP_SOURCE_VAL_RECVD, the received value is not
2499                          * inherited.
2500                          */
2501                         if (strcmp(source, ZPROP_SOURCE_VAL_RECVD) == 0) {
2502                                 relpath = "";
2503                         } else {
2504                                 relpath = zhp->zfs_name + strlen(source);
2505                                 if (relpath[0] == '/')
2506                                         relpath++;
2507                         }
2508
2509                         if ((zpool_get_prop(zhp->zpool_hdl,
2510                             ZPOOL_PROP_ALTROOT, buf, MAXPATHLEN, NULL,
2511                             B_FALSE)) || (strcmp(root, "-") == 0))
2512                                 root[0] = '\0';
2513                         /*
2514                          * Special case an alternate root of '/'. This will
2515                          * avoid having multiple leading slashes in the
2516                          * mountpoint path.
2517                          */
2518                         if (strcmp(root, "/") == 0)
2519                                 root++;
2520
2521                         /*
2522                          * If the mountpoint is '/' then skip over this
2523                          * if we are obtaining either an alternate root or
2524                          * an inherited mountpoint.
2525                          */
2526                         if (str[1] == '\0' && (root[0] != '\0' ||
2527                             relpath[0] != '\0'))
2528                                 str++;
2529
2530                         if (relpath[0] == '\0')
2531                                 (void) snprintf(propbuf, proplen, "%s%s",
2532                                     root, str);
2533                         else
2534                                 (void) snprintf(propbuf, proplen, "%s%s%s%s",
2535                                     root, str, relpath[0] == '@' ? "" : "/",
2536                                     relpath);
2537                 } else {
2538                         /* 'legacy' or 'none' */
2539                         (void) strlcpy(propbuf, str, proplen);
2540                 }
2541                 zcp_check(zhp, prop, NULL, propbuf);
2542                 break;
2543
2544         case ZFS_PROP_ORIGIN:
2545                 str = getprop_string(zhp, prop, &source);
2546                 if (str == NULL)
2547                         return (-1);
2548                 (void) strlcpy(propbuf, str, proplen);
2549                 zcp_check(zhp, prop, NULL, str);
2550                 break;
2551
2552         case ZFS_PROP_CLONES:
2553                 if (get_clones_string(zhp, propbuf, proplen) != 0)
2554                         return (-1);
2555                 break;
2556
2557         case ZFS_PROP_QUOTA:
2558         case ZFS_PROP_REFQUOTA:
2559         case ZFS_PROP_RESERVATION:
2560         case ZFS_PROP_REFRESERVATION:
2561
2562                 if (get_numeric_property(zhp, prop, src, &source, &val) != 0)
2563                         return (-1);
2564                 /*
2565                  * If quota or reservation is 0, we translate this into 'none'
2566                  * (unless literal is set), and indicate that it's the default
2567                  * value.  Otherwise, we print the number nicely and indicate
2568                  * that its set locally.
2569                  */
2570                 if (val == 0) {
2571                         if (literal)
2572                                 (void) strlcpy(propbuf, "0", proplen);
2573                         else
2574                                 (void) strlcpy(propbuf, "none", proplen);
2575                 } else {
2576                         if (literal)
2577                                 (void) snprintf(propbuf, proplen, "%llu",
2578                                     (u_longlong_t)val);
2579                         else
2580                                 zfs_nicenum(val, propbuf, proplen);
2581                 }
2582                 zcp_check(zhp, prop, val, NULL);
2583                 break;
2584
2585         case ZFS_PROP_FILESYSTEM_LIMIT:
2586         case ZFS_PROP_SNAPSHOT_LIMIT:
2587         case ZFS_PROP_FILESYSTEM_COUNT:
2588         case ZFS_PROP_SNAPSHOT_COUNT:
2589
2590                 if (get_numeric_property(zhp, prop, src, &source, &val) != 0)
2591                         return (-1);
2592
2593                 /*
2594                  * If limit is UINT64_MAX, we translate this into 'none' (unless
2595                  * literal is set), and indicate that it's the default value.
2596                  * Otherwise, we print the number nicely and indicate that it's
2597                  * set locally.
2598                  */
2599                 if (literal) {
2600                         (void) snprintf(propbuf, proplen, "%llu",
2601                             (u_longlong_t)val);
2602                 } else if (val == UINT64_MAX) {
2603                         (void) strlcpy(propbuf, "none", proplen);
2604                 } else {
2605                         zfs_nicenum(val, propbuf, proplen);
2606                 }
2607
2608                 zcp_check(zhp, prop, val, NULL);
2609                 break;
2610
2611         case ZFS_PROP_REFRATIO:
2612         case ZFS_PROP_COMPRESSRATIO:
2613                 if (get_numeric_property(zhp, prop, src, &source, &val) != 0)
2614                         return (-1);
2615                 (void) snprintf(propbuf, proplen, "%llu.%02llux",
2616                     (u_longlong_t)(val / 100),
2617                     (u_longlong_t)(val % 100));
2618                 zcp_check(zhp, prop, val, NULL);
2619                 break;
2620
2621         case ZFS_PROP_TYPE:
2622                 switch (zhp->zfs_type) {
2623                 case ZFS_TYPE_FILESYSTEM:
2624                         str = "filesystem";
2625                         break;
2626                 case ZFS_TYPE_VOLUME:
2627                         str = "volume";
2628                         break;
2629                 case ZFS_TYPE_SNAPSHOT:
2630                         str = "snapshot";
2631                         break;
2632                 case ZFS_TYPE_BOOKMARK:
2633                         str = "bookmark";
2634                         break;
2635                 default:
2636                         abort();
2637                 }
2638                 (void) snprintf(propbuf, proplen, "%s", str);
2639                 zcp_check(zhp, prop, NULL, propbuf);
2640                 break;
2641
2642         case ZFS_PROP_MOUNTED:
2643                 /*
2644                  * The 'mounted' property is a pseudo-property that described
2645                  * whether the filesystem is currently mounted.  Even though
2646                  * it's a boolean value, the typical values of "on" and "off"
2647                  * don't make sense, so we translate to "yes" and "no".
2648                  */
2649                 if (get_numeric_property(zhp, ZFS_PROP_MOUNTED,
2650                     src, &source, &val) != 0)
2651                         return (-1);
2652                 if (val)
2653                         (void) strlcpy(propbuf, "yes", proplen);
2654                 else
2655                         (void) strlcpy(propbuf, "no", proplen);
2656                 break;
2657
2658         case ZFS_PROP_NAME:
2659                 /*
2660                  * The 'name' property is a pseudo-property derived from the
2661                  * dataset name.  It is presented as a real property to simplify
2662                  * consumers.
2663                  */
2664                 (void) strlcpy(propbuf, zhp->zfs_name, proplen);
2665                 zcp_check(zhp, prop, NULL, propbuf);
2666                 break;
2667
2668         case ZFS_PROP_MLSLABEL:
2669                 {
2670 #ifdef illumos
2671                         m_label_t *new_sl = NULL;
2672                         char *ascii = NULL;     /* human readable label */
2673
2674                         (void) strlcpy(propbuf,
2675                             getprop_string(zhp, prop, &source), proplen);
2676
2677                         if (literal || (strcasecmp(propbuf,
2678                             ZFS_MLSLABEL_DEFAULT) == 0))
2679                                 break;
2680
2681                         /*
2682                          * Try to translate the internal hex string to
2683                          * human-readable output.  If there are any
2684                          * problems just use the hex string.
2685                          */
2686
2687                         if (str_to_label(propbuf, &new_sl, MAC_LABEL,
2688                             L_NO_CORRECTION, NULL) == -1) {
2689                                 m_label_free(new_sl);
2690                                 break;
2691                         }
2692
2693                         if (label_to_str(new_sl, &ascii, M_LABEL,
2694                             DEF_NAMES) != 0) {
2695                                 if (ascii)
2696                                         free(ascii);
2697                                 m_label_free(new_sl);
2698                                 break;
2699                         }
2700                         m_label_free(new_sl);
2701
2702                         (void) strlcpy(propbuf, ascii, proplen);
2703                         free(ascii);
2704 #else   /* !illumos */
2705                         propbuf[0] = '\0';
2706 #endif  /* illumos */
2707                 }
2708                 break;
2709
2710         case ZFS_PROP_GUID:
2711                 /*
2712                  * GUIDs are stored as numbers, but they are identifiers.
2713                  * We don't want them to be pretty printed, because pretty
2714                  * printing mangles the ID into a truncated and useless value.
2715                  */
2716                 if (get_numeric_property(zhp, prop, src, &source, &val) != 0)
2717                         return (-1);
2718                 (void) snprintf(propbuf, proplen, "%llu", (u_longlong_t)val);
2719                 zcp_check(zhp, prop, val, NULL);
2720                 break;
2721
2722         default:
2723                 switch (zfs_prop_get_type(prop)) {
2724                 case PROP_TYPE_NUMBER:
2725                         if (get_numeric_property(zhp, prop, src,
2726                             &source, &val) != 0) {
2727                                 return (-1);
2728                         }
2729
2730                         if (literal) {
2731                                 (void) snprintf(propbuf, proplen, "%llu",
2732                                     (u_longlong_t)val);
2733                         } else {
2734                                 zfs_nicenum(val, propbuf, proplen);
2735                         }
2736                         zcp_check(zhp, prop, val, NULL);
2737                         break;
2738
2739                 case PROP_TYPE_STRING:
2740                         str = getprop_string(zhp, prop, &source);
2741                         if (str == NULL)
2742                                 return (-1);
2743
2744                         (void) strlcpy(propbuf, str, proplen);
2745                         zcp_check(zhp, prop, NULL, str);
2746                         break;
2747
2748                 case PROP_TYPE_INDEX:
2749                         if (get_numeric_property(zhp, prop, src,
2750                             &source, &val) != 0)
2751                                 return (-1);
2752                         if (zfs_prop_index_to_string(prop, val, &strval) != 0)
2753                                 return (-1);
2754
2755                         (void) strlcpy(propbuf, strval, proplen);
2756                         zcp_check(zhp, prop, NULL, strval);
2757                         break;
2758
2759                 default:
2760                         abort();
2761                 }
2762         }
2763
2764         get_source(zhp, src, source, statbuf, statlen);
2765
2766         return (0);
2767 }
2768
2769 /*
2770  * Utility function to get the given numeric property.  Does no validation that
2771  * the given property is the appropriate type; should only be used with
2772  * hard-coded property types.
2773  */
2774 uint64_t
2775 zfs_prop_get_int(zfs_handle_t *zhp, zfs_prop_t prop)
2776 {
2777         char *source;
2778         uint64_t val;
2779
2780         (void) get_numeric_property(zhp, prop, NULL, &source, &val);
2781
2782         return (val);
2783 }
2784
2785 int
2786 zfs_prop_set_int(zfs_handle_t *zhp, zfs_prop_t prop, uint64_t val)
2787 {
2788         char buf[64];
2789
2790         (void) snprintf(buf, sizeof (buf), "%llu", (longlong_t)val);
2791         return (zfs_prop_set(zhp, zfs_prop_to_name(prop), buf));
2792 }
2793
2794 /*
2795  * Similar to zfs_prop_get(), but returns the value as an integer.
2796  */
2797 int
2798 zfs_prop_get_numeric(zfs_handle_t *zhp, zfs_prop_t prop, uint64_t *value,
2799     zprop_source_t *src, char *statbuf, size_t statlen)
2800 {
2801         char *source;
2802
2803         /*
2804          * Check to see if this property applies to our object
2805          */
2806         if (!zfs_prop_valid_for_type(prop, zhp->zfs_type)) {
2807                 return (zfs_error_fmt(zhp->zfs_hdl, EZFS_PROPTYPE,
2808                     dgettext(TEXT_DOMAIN, "cannot get property '%s'"),
2809                     zfs_prop_to_name(prop)));
2810         }
2811
2812         if (src)
2813                 *src = ZPROP_SRC_NONE;
2814
2815         if (get_numeric_property(zhp, prop, src, &source, value) != 0)
2816                 return (-1);
2817
2818         get_source(zhp, src, source, statbuf, statlen);
2819
2820         return (0);
2821 }
2822
2823 static int
2824 idmap_id_to_numeric_domain_rid(uid_t id, boolean_t isuser,
2825     char **domainp, idmap_rid_t *ridp)
2826 {
2827 #ifdef illumos
2828         idmap_get_handle_t *get_hdl = NULL;
2829         idmap_stat status;
2830         int err = EINVAL;
2831
2832         if (idmap_get_create(&get_hdl) != IDMAP_SUCCESS)
2833                 goto out;
2834
2835         if (isuser) {
2836                 err = idmap_get_sidbyuid(get_hdl, id,
2837                     IDMAP_REQ_FLG_USE_CACHE, domainp, ridp, &status);
2838         } else {
2839                 err = idmap_get_sidbygid(get_hdl, id,
2840                     IDMAP_REQ_FLG_USE_CACHE, domainp, ridp, &status);
2841         }
2842         if (err == IDMAP_SUCCESS &&
2843             idmap_get_mappings(get_hdl) == IDMAP_SUCCESS &&
2844             status == IDMAP_SUCCESS)
2845                 err = 0;
2846         else
2847                 err = EINVAL;
2848 out:
2849         if (get_hdl)
2850                 idmap_get_destroy(get_hdl);
2851         return (err);
2852 #else   /* !illumos */
2853         assert(!"invalid code path");
2854         return (EINVAL); // silence compiler warning
2855 #endif  /* illumos */
2856 }
2857
2858 /*
2859  * convert the propname into parameters needed by kernel
2860  * Eg: userquota@ahrens -> ZFS_PROP_USERQUOTA, "", 126829
2861  * Eg: userused@matt@domain -> ZFS_PROP_USERUSED, "S-1-123-456", 789
2862  */
2863 static int
2864 userquota_propname_decode(const char *propname, boolean_t zoned,
2865     zfs_userquota_prop_t *typep, char *domain, int domainlen, uint64_t *ridp)
2866 {
2867         zfs_userquota_prop_t type;
2868         char *cp, *end;
2869         char *numericsid = NULL;
2870         boolean_t isuser;
2871
2872         domain[0] = '\0';
2873         *ridp = 0;
2874         /* Figure out the property type ({user|group}{quota|space}) */
2875         for (type = 0; type < ZFS_NUM_USERQUOTA_PROPS; type++) {
2876                 if (strncmp(propname, zfs_userquota_prop_prefixes[type],
2877                     strlen(zfs_userquota_prop_prefixes[type])) == 0)
2878                         break;
2879         }
2880         if (type == ZFS_NUM_USERQUOTA_PROPS)
2881                 return (EINVAL);
2882         *typep = type;
2883
2884         isuser = (type == ZFS_PROP_USERQUOTA ||
2885             type == ZFS_PROP_USERUSED);
2886
2887         cp = strchr(propname, '@') + 1;
2888
2889         if (strchr(cp, '@')) {
2890 #ifdef illumos
2891                 /*
2892                  * It's a SID name (eg "user@domain") that needs to be
2893                  * turned into S-1-domainID-RID.
2894                  */
2895                 int flag = 0;
2896                 idmap_stat stat, map_stat;
2897                 uid_t pid;
2898                 idmap_rid_t rid;
2899                 idmap_get_handle_t *gh = NULL;
2900
2901                 stat = idmap_get_create(&gh);
2902                 if (stat != IDMAP_SUCCESS) {
2903                         idmap_get_destroy(gh);
2904                         return (ENOMEM);
2905                 }
2906                 if (zoned && getzoneid() == GLOBAL_ZONEID)
2907                         return (ENOENT);
2908                 if (isuser) {
2909                         stat = idmap_getuidbywinname(cp, NULL, flag, &pid);
2910                         if (stat < 0)
2911                                 return (ENOENT);
2912                         stat = idmap_get_sidbyuid(gh, pid, flag, &numericsid,
2913                             &rid, &map_stat);
2914                 } else {
2915                         stat = idmap_getgidbywinname(cp, NULL, flag, &pid);
2916                         if (stat < 0)
2917                                 return (ENOENT);
2918                         stat = idmap_get_sidbygid(gh, pid, flag, &numericsid,
2919                             &rid, &map_stat);
2920                 }
2921                 if (stat < 0) {
2922                         idmap_get_destroy(gh);
2923                         return (ENOENT);
2924                 }
2925                 stat = idmap_get_mappings(gh);
2926                 idmap_get_destroy(gh);
2927
2928                 if (stat < 0) {
2929                         return (ENOENT);
2930                 }
2931                 if (numericsid == NULL)
2932                         return (ENOENT);
2933                 cp = numericsid;
2934                 *ridp = rid;
2935                 /* will be further decoded below */
2936 #else   /* !illumos */
2937                 return (ENOENT);
2938 #endif  /* illumos */
2939         }
2940
2941         if (strncmp(cp, "S-1-", 4) == 0) {
2942                 /* It's a numeric SID (eg "S-1-234-567-89") */
2943                 (void) strlcpy(domain, cp, domainlen);
2944                 errno = 0;
2945                 if (*ridp == 0) {
2946                         cp = strrchr(domain, '-');
2947                         *cp = '\0';
2948                         cp++;
2949                         *ridp = strtoull(cp, &end, 10);
2950                 } else {
2951                         end = "";
2952                 }
2953                 if (numericsid) {
2954                         free(numericsid);
2955                         numericsid = NULL;
2956                 }
2957                 if (errno != 0 || *end != '\0')
2958                         return (EINVAL);
2959         } else if (!isdigit(*cp)) {
2960                 /*
2961                  * It's a user/group name (eg "user") that needs to be
2962                  * turned into a uid/gid
2963                  */
2964                 if (zoned && getzoneid() == GLOBAL_ZONEID)
2965                         return (ENOENT);
2966                 if (isuser) {
2967                         struct passwd *pw;
2968                         pw = getpwnam(cp);
2969                         if (pw == NULL)
2970                                 return (ENOENT);
2971                         *ridp = pw->pw_uid;
2972                 } else {
2973                         struct group *gr;
2974                         gr = getgrnam(cp);
2975                         if (gr == NULL)
2976                                 return (ENOENT);
2977                         *ridp = gr->gr_gid;
2978                 }
2979         } else {
2980                 /* It's a user/group ID (eg "12345"). */
2981                 uid_t id = strtoul(cp, &end, 10);
2982                 idmap_rid_t rid;
2983                 char *mapdomain;
2984
2985                 if (*end != '\0')
2986                         return (EINVAL);
2987                 if (id > MAXUID) {
2988                         /* It's an ephemeral ID. */
2989                         if (idmap_id_to_numeric_domain_rid(id, isuser,
2990                             &mapdomain, &rid) != 0)
2991                                 return (ENOENT);
2992                         (void) strlcpy(domain, mapdomain, domainlen);
2993                         *ridp = rid;
2994                 } else {
2995                         *ridp = id;
2996                 }
2997         }
2998
2999         ASSERT3P(numericsid, ==, NULL);
3000         return (0);
3001 }
3002
3003 static int
3004 zfs_prop_get_userquota_common(zfs_handle_t *zhp, const char *propname,
3005     uint64_t *propvalue, zfs_userquota_prop_t *typep)
3006 {
3007         int err;
3008         zfs_cmd_t zc = { 0 };
3009
3010         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
3011
3012         err = userquota_propname_decode(propname,
3013             zfs_prop_get_int(zhp, ZFS_PROP_ZONED),
3014             typep, zc.zc_value, sizeof (zc.zc_value), &zc.zc_guid);
3015         zc.zc_objset_type = *typep;
3016         if (err)
3017                 return (err);
3018
3019         err = ioctl(zhp->zfs_hdl->libzfs_fd, ZFS_IOC_USERSPACE_ONE, &zc);
3020         if (err)
3021                 return (err);
3022
3023         *propvalue = zc.zc_cookie;
3024         return (0);
3025 }
3026
3027 int
3028 zfs_prop_get_userquota_int(zfs_handle_t *zhp, const char *propname,
3029     uint64_t *propvalue)
3030 {
3031         zfs_userquota_prop_t type;
3032
3033         return (zfs_prop_get_userquota_common(zhp, propname, propvalue,
3034             &type));
3035 }
3036
3037 int
3038 zfs_prop_get_userquota(zfs_handle_t *zhp, const char *propname,
3039     char *propbuf, int proplen, boolean_t literal)
3040 {
3041         int err;
3042         uint64_t propvalue;
3043         zfs_userquota_prop_t type;
3044
3045         err = zfs_prop_get_userquota_common(zhp, propname, &propvalue,
3046             &type);
3047
3048         if (err)
3049                 return (err);
3050
3051         if (literal) {
3052                 (void) snprintf(propbuf, proplen, "%llu", propvalue);
3053         } else if (propvalue == 0 &&
3054             (type == ZFS_PROP_USERQUOTA || type == ZFS_PROP_GROUPQUOTA)) {
3055                 (void) strlcpy(propbuf, "none", proplen);
3056         } else {
3057                 zfs_nicenum(propvalue, propbuf, proplen);
3058         }
3059         return (0);
3060 }
3061
3062 int
3063 zfs_prop_get_written_int(zfs_handle_t *zhp, const char *propname,
3064     uint64_t *propvalue)
3065 {
3066         int err;
3067         zfs_cmd_t zc = { 0 };
3068         const char *snapname;
3069
3070         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
3071
3072         snapname = strchr(propname, '@') + 1;
3073         if (strchr(snapname, '@')) {
3074                 (void) strlcpy(zc.zc_value, snapname, sizeof (zc.zc_value));
3075         } else {
3076                 /* snapname is the short name, append it to zhp's fsname */
3077                 char *cp;
3078
3079                 (void) strlcpy(zc.zc_value, zhp->zfs_name,
3080                     sizeof (zc.zc_value));
3081                 cp = strchr(zc.zc_value, '@');
3082                 if (cp != NULL)
3083                         *cp = '\0';
3084                 (void) strlcat(zc.zc_value, "@", sizeof (zc.zc_value));
3085                 (void) strlcat(zc.zc_value, snapname, sizeof (zc.zc_value));
3086         }
3087
3088         err = ioctl(zhp->zfs_hdl->libzfs_fd, ZFS_IOC_SPACE_WRITTEN, &zc);
3089         if (err)
3090                 return (err);
3091
3092         *propvalue = zc.zc_cookie;
3093         return (0);
3094 }
3095
3096 int
3097 zfs_prop_get_written(zfs_handle_t *zhp, const char *propname,
3098     char *propbuf, int proplen, boolean_t literal)
3099 {
3100         int err;
3101         uint64_t propvalue;
3102
3103         err = zfs_prop_get_written_int(zhp, propname, &propvalue);
3104
3105         if (err)
3106                 return (err);
3107
3108         if (literal) {
3109                 (void) snprintf(propbuf, proplen, "%llu", propvalue);
3110         } else {
3111                 zfs_nicenum(propvalue, propbuf, proplen);
3112         }
3113         return (0);
3114 }
3115
3116 /*
3117  * Returns the name of the given zfs handle.
3118  */
3119 const char *
3120 zfs_get_name(const zfs_handle_t *zhp)
3121 {
3122         return (zhp->zfs_name);
3123 }
3124
3125 /*
3126  * Returns the name of the parent pool for the given zfs handle.
3127  */
3128 const char *
3129 zfs_get_pool_name(const zfs_handle_t *zhp)
3130 {
3131         return (zhp->zpool_hdl->zpool_name);
3132 }
3133
3134 /*
3135  * Returns the type of the given zfs handle.
3136  */
3137 zfs_type_t
3138 zfs_get_type(const zfs_handle_t *zhp)
3139 {
3140         return (zhp->zfs_type);
3141 }
3142
3143 /*
3144  * Is one dataset name a child dataset of another?
3145  *
3146  * Needs to handle these cases:
3147  * Dataset 1    "a/foo"         "a/foo"         "a/foo"         "a/foo"
3148  * Dataset 2    "a/fo"          "a/foobar"      "a/bar/baz"     "a/foo/bar"
3149  * Descendant?  No.             No.             No.             Yes.
3150  */
3151 static boolean_t
3152 is_descendant(const char *ds1, const char *ds2)
3153 {
3154         size_t d1len = strlen(ds1);
3155
3156         /* ds2 can't be a descendant if it's smaller */
3157         if (strlen(ds2) < d1len)
3158                 return (B_FALSE);
3159
3160         /* otherwise, compare strings and verify that there's a '/' char */
3161         return (ds2[d1len] == '/' && (strncmp(ds1, ds2, d1len) == 0));
3162 }
3163
3164 /*
3165  * Given a complete name, return just the portion that refers to the parent.
3166  * Will return -1 if there is no parent (path is just the name of the
3167  * pool).
3168  */
3169 static int
3170 parent_name(const char *path, char *buf, size_t buflen)
3171 {
3172         char *slashp;
3173
3174         (void) strlcpy(buf, path, buflen);
3175
3176         if ((slashp = strrchr(buf, '/')) == NULL)
3177                 return (-1);
3178         *slashp = '\0';
3179
3180         return (0);
3181 }
3182
3183 /*
3184  * If accept_ancestor is false, then check to make sure that the given path has
3185  * a parent, and that it exists.  If accept_ancestor is true, then find the
3186  * closest existing ancestor for the given path.  In prefixlen return the
3187  * length of already existing prefix of the given path.  We also fetch the
3188  * 'zoned' property, which is used to validate property settings when creating
3189  * new datasets.
3190  */
3191 static int
3192 check_parents(libzfs_handle_t *hdl, const char *path, uint64_t *zoned,
3193     boolean_t accept_ancestor, int *prefixlen)
3194 {
3195         zfs_cmd_t zc = { 0 };
3196         char parent[ZFS_MAX_DATASET_NAME_LEN];
3197         char *slash;
3198         zfs_handle_t *zhp;
3199         char errbuf[1024];
3200         uint64_t is_zoned;
3201
3202         (void) snprintf(errbuf, sizeof (errbuf),
3203             dgettext(TEXT_DOMAIN, "cannot create '%s'"), path);
3204
3205         /* get parent, and check to see if this is just a pool */
3206         if (parent_name(path, parent, sizeof (parent)) != 0) {
3207                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3208                     "missing dataset name"));
3209                 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3210         }
3211
3212         /* check to see if the pool exists */
3213         if ((slash = strchr(parent, '/')) == NULL)
3214                 slash = parent + strlen(parent);
3215         (void) strncpy(zc.zc_name, parent, slash - parent);
3216         zc.zc_name[slash - parent] = '\0';
3217         if (ioctl(hdl->libzfs_fd, ZFS_IOC_OBJSET_STATS, &zc) != 0 &&
3218             errno == ENOENT) {
3219                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3220                     "no such pool '%s'"), zc.zc_name);
3221                 return (zfs_error(hdl, EZFS_NOENT, errbuf));
3222         }
3223
3224         /* check to see if the parent dataset exists */
3225         while ((zhp = make_dataset_handle(hdl, parent)) == NULL) {
3226                 if (errno == ENOENT && accept_ancestor) {
3227                         /*
3228                          * Go deeper to find an ancestor, give up on top level.
3229                          */
3230                         if (parent_name(parent, parent, sizeof (parent)) != 0) {
3231                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3232                                     "no such pool '%s'"), zc.zc_name);
3233                                 return (zfs_error(hdl, EZFS_NOENT, errbuf));
3234                         }
3235                 } else if (errno == ENOENT) {
3236                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3237                             "parent does not exist"));
3238                         return (zfs_error(hdl, EZFS_NOENT, errbuf));
3239                 } else
3240                         return (zfs_standard_error(hdl, errno, errbuf));
3241         }
3242
3243         is_zoned = zfs_prop_get_int(zhp, ZFS_PROP_ZONED);
3244         if (zoned != NULL)
3245                 *zoned = is_zoned;
3246
3247         /* we are in a non-global zone, but parent is in the global zone */
3248         if (getzoneid() != GLOBAL_ZONEID && !is_zoned) {
3249                 (void) zfs_standard_error(hdl, EPERM, errbuf);
3250                 zfs_close(zhp);
3251                 return (-1);
3252         }
3253
3254         /* make sure parent is a filesystem */
3255         if (zfs_get_type(zhp) != ZFS_TYPE_FILESYSTEM) {
3256                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3257                     "parent is not a filesystem"));
3258                 (void) zfs_error(hdl, EZFS_BADTYPE, errbuf);
3259                 zfs_close(zhp);
3260                 return (-1);
3261         }
3262
3263         zfs_close(zhp);
3264         if (prefixlen != NULL)
3265                 *prefixlen = strlen(parent);
3266         return (0);
3267 }
3268
3269 /*
3270  * Finds whether the dataset of the given type(s) exists.
3271  */
3272 boolean_t
3273 zfs_dataset_exists(libzfs_handle_t *hdl, const char *path, zfs_type_t types)
3274 {
3275         zfs_handle_t *zhp;
3276
3277         if (!zfs_validate_name(hdl, path, types, B_FALSE))
3278                 return (B_FALSE);
3279
3280         /*
3281          * Try to get stats for the dataset, which will tell us if it exists.
3282          */
3283         if ((zhp = make_dataset_handle(hdl, path)) != NULL) {
3284                 int ds_type = zhp->zfs_type;
3285
3286                 zfs_close(zhp);
3287                 if (types & ds_type)
3288                         return (B_TRUE);
3289         }
3290         return (B_FALSE);
3291 }
3292
3293 /*
3294  * Given a path to 'target', create all the ancestors between
3295  * the prefixlen portion of the path, and the target itself.
3296  * Fail if the initial prefixlen-ancestor does not already exist.
3297  */
3298 int
3299 create_parents(libzfs_handle_t *hdl, char *target, int prefixlen)
3300 {
3301         zfs_handle_t *h;
3302         char *cp;
3303         const char *opname;
3304
3305         /* make sure prefix exists */
3306         cp = target + prefixlen;
3307         if (*cp != '/') {
3308                 assert(strchr(cp, '/') == NULL);
3309                 h = zfs_open(hdl, target, ZFS_TYPE_FILESYSTEM);
3310         } else {
3311                 *cp = '\0';
3312                 h = zfs_open(hdl, target, ZFS_TYPE_FILESYSTEM);
3313                 *cp = '/';
3314         }
3315         if (h == NULL)
3316                 return (-1);
3317         zfs_close(h);
3318
3319         /*
3320          * Attempt to create, mount, and share any ancestor filesystems,
3321          * up to the prefixlen-long one.
3322          */
3323         for (cp = target + prefixlen + 1;
3324             (cp = strchr(cp, '/')) != NULL; *cp = '/', cp++) {
3325
3326                 *cp = '\0';
3327
3328                 h = make_dataset_handle(hdl, target);
3329                 if (h) {
3330                         /* it already exists, nothing to do here */
3331                         zfs_close(h);
3332                         continue;
3333                 }
3334
3335                 if (zfs_create(hdl, target, ZFS_TYPE_FILESYSTEM,
3336                     NULL) != 0) {
3337                         opname = dgettext(TEXT_DOMAIN, "create");
3338                         goto ancestorerr;
3339                 }
3340
3341                 h = zfs_open(hdl, target, ZFS_TYPE_FILESYSTEM);
3342                 if (h == NULL) {
3343                         opname = dgettext(TEXT_DOMAIN, "open");
3344                         goto ancestorerr;
3345                 }
3346
3347                 if (zfs_mount(h, NULL, 0) != 0) {
3348                         opname = dgettext(TEXT_DOMAIN, "mount");
3349                         goto ancestorerr;
3350                 }
3351
3352                 if (zfs_share(h) != 0) {
3353                         opname = dgettext(TEXT_DOMAIN, "share");
3354                         goto ancestorerr;
3355                 }
3356
3357                 zfs_close(h);
3358         }
3359
3360         return (0);
3361
3362 ancestorerr:
3363         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3364             "failed to %s ancestor '%s'"), opname, target);
3365         return (-1);
3366 }
3367
3368 /*
3369  * Creates non-existing ancestors of the given path.
3370  */
3371 int
3372 zfs_create_ancestors(libzfs_handle_t *hdl, const char *path)
3373 {
3374         int prefix;
3375         char *path_copy;
3376         int rc = 0;
3377
3378         if (check_parents(hdl, path, NULL, B_TRUE, &prefix) != 0)
3379                 return (-1);
3380
3381         if ((path_copy = strdup(path)) != NULL) {
3382                 rc = create_parents(hdl, path_copy, prefix);
3383                 free(path_copy);
3384         }
3385         if (path_copy == NULL || rc != 0)
3386                 return (-1);
3387
3388         return (0);
3389 }
3390
3391 /*
3392  * Create a new filesystem or volume.
3393  */
3394 int
3395 zfs_create(libzfs_handle_t *hdl, const char *path, zfs_type_t type,
3396     nvlist_t *props)
3397 {
3398         int ret;
3399         uint64_t size = 0;
3400         uint64_t blocksize = zfs_prop_default_numeric(ZFS_PROP_VOLBLOCKSIZE);
3401         char errbuf[1024];
3402         uint64_t zoned;
3403         enum lzc_dataset_type ost;
3404         zpool_handle_t *zpool_handle;
3405
3406         (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3407             "cannot create '%s'"), path);
3408
3409         /* validate the path, taking care to note the extended error message */
3410         if (!zfs_validate_name(hdl, path, type, B_TRUE))
3411                 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3412
3413         /* validate parents exist */
3414         if (check_parents(hdl, path, &zoned, B_FALSE, NULL) != 0)
3415                 return (-1);
3416
3417         /*
3418          * The failure modes when creating a dataset of a different type over
3419          * one that already exists is a little strange.  In particular, if you
3420          * try to create a dataset on top of an existing dataset, the ioctl()
3421          * will return ENOENT, not EEXIST.  To prevent this from happening, we
3422          * first try to see if the dataset exists.
3423          */
3424         if (zfs_dataset_exists(hdl, path, ZFS_TYPE_DATASET)) {
3425                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3426                     "dataset already exists"));
3427                 return (zfs_error(hdl, EZFS_EXISTS, errbuf));
3428         }
3429
3430         if (type == ZFS_TYPE_VOLUME)
3431                 ost = LZC_DATSET_TYPE_ZVOL;
3432         else
3433                 ost = LZC_DATSET_TYPE_ZFS;
3434
3435         /* open zpool handle for prop validation */
3436         char pool_path[ZFS_MAX_DATASET_NAME_LEN];
3437         (void) strlcpy(pool_path, path, sizeof (pool_path));
3438
3439         /* truncate pool_path at first slash */
3440         char *p = strchr(pool_path, '/');
3441         if (p != NULL)
3442                 *p = '\0';
3443
3444         if ((zpool_handle = zpool_open(hdl, pool_path)) == NULL)
3445                 return (-1);
3446
3447         if (props && (props = zfs_valid_proplist(hdl, type, props,
3448             zoned, NULL, zpool_handle, errbuf)) == 0) {
3449                 zpool_close(zpool_handle);
3450                 return (-1);
3451         }
3452         zpool_close(zpool_handle);
3453
3454         if (type == ZFS_TYPE_VOLUME) {
3455                 /*
3456                  * If we are creating a volume, the size and block size must
3457                  * satisfy a few restraints.  First, the blocksize must be a
3458                  * valid block size between SPA_{MIN,MAX}BLOCKSIZE.  Second, the
3459                  * volsize must be a multiple of the block size, and cannot be
3460                  * zero.
3461                  */
3462                 if (props == NULL || nvlist_lookup_uint64(props,
3463                     zfs_prop_to_name(ZFS_PROP_VOLSIZE), &size) != 0) {
3464                         nvlist_free(props);
3465                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3466                             "missing volume size"));
3467                         return (zfs_error(hdl, EZFS_BADPROP, errbuf));
3468                 }
3469
3470                 if ((ret = nvlist_lookup_uint64(props,
3471                     zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE),
3472                     &blocksize)) != 0) {
3473                         if (ret == ENOENT) {
3474                                 blocksize = zfs_prop_default_numeric(
3475                                     ZFS_PROP_VOLBLOCKSIZE);
3476                         } else {
3477                                 nvlist_free(props);
3478                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3479                                     "missing volume block size"));
3480                                 return (zfs_error(hdl, EZFS_BADPROP, errbuf));
3481                         }
3482                 }
3483
3484                 if (size == 0) {
3485                         nvlist_free(props);
3486                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3487                             "volume size cannot be zero"));
3488                         return (zfs_error(hdl, EZFS_BADPROP, errbuf));
3489                 }
3490
3491                 if (size % blocksize != 0) {
3492                         nvlist_free(props);
3493                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3494                             "volume size must be a multiple of volume block "
3495                             "size"));
3496                         return (zfs_error(hdl, EZFS_BADPROP, errbuf));
3497                 }
3498         }
3499
3500         /* create the dataset */
3501         ret = lzc_create(path, ost, props);
3502         nvlist_free(props);
3503
3504         /* check for failure */
3505         if (ret != 0) {
3506                 char parent[ZFS_MAX_DATASET_NAME_LEN];
3507                 (void) parent_name(path, parent, sizeof (parent));
3508
3509                 switch (errno) {
3510                 case ENOENT:
3511                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3512                             "no such parent '%s'"), parent);
3513                         return (zfs_error(hdl, EZFS_NOENT, errbuf));
3514
3515                 case EINVAL:
3516                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3517                             "parent '%s' is not a filesystem"), parent);
3518                         return (zfs_error(hdl, EZFS_BADTYPE, errbuf));
3519
3520                 case ENOTSUP:
3521                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3522                             "pool must be upgraded to set this "
3523                             "property or value"));
3524                         return (zfs_error(hdl, EZFS_BADVERSION, errbuf));
3525 #ifdef _ILP32
3526                 case EOVERFLOW:
3527                         /*
3528                          * This platform can't address a volume this big.
3529                          */
3530                         if (type == ZFS_TYPE_VOLUME)
3531                                 return (zfs_error(hdl, EZFS_VOLTOOBIG,
3532                                     errbuf));
3533 #endif
3534                         /* FALLTHROUGH */
3535                 default:
3536                         return (zfs_standard_error(hdl, errno, errbuf));
3537                 }
3538         }
3539
3540         return (0);
3541 }
3542
3543 /*
3544  * Destroys the given dataset.  The caller must make sure that the filesystem
3545  * isn't mounted, and that there are no active dependents. If the file system
3546  * does not exist this function does nothing.
3547  */
3548 int
3549 zfs_destroy(zfs_handle_t *zhp, boolean_t defer)
3550 {
3551         zfs_cmd_t zc = { 0 };
3552
3553         if (zhp->zfs_type == ZFS_TYPE_BOOKMARK) {
3554                 nvlist_t *nv = fnvlist_alloc();
3555                 fnvlist_add_boolean(nv, zhp->zfs_name);
3556                 int error = lzc_destroy_bookmarks(nv, NULL);
3557                 fnvlist_free(nv);
3558                 if (error != 0) {
3559                         return (zfs_standard_error_fmt(zhp->zfs_hdl, errno,
3560                             dgettext(TEXT_DOMAIN, "cannot destroy '%s'"),
3561                             zhp->zfs_name));
3562                 }
3563                 return (0);
3564         }
3565
3566         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
3567
3568         if (ZFS_IS_VOLUME(zhp)) {
3569                 zc.zc_objset_type = DMU_OST_ZVOL;
3570         } else {
3571                 zc.zc_objset_type = DMU_OST_ZFS;
3572         }
3573
3574         zc.zc_defer_destroy = defer;
3575         if (zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_DESTROY, &zc) != 0 &&
3576             errno != ENOENT) {
3577                 return (zfs_standard_error_fmt(zhp->zfs_hdl, errno,
3578                     dgettext(TEXT_DOMAIN, "cannot destroy '%s'"),
3579                     zhp->zfs_name));
3580         }
3581
3582         remove_mountpoint(zhp);
3583
3584         return (0);
3585 }
3586
3587 struct destroydata {
3588         nvlist_t *nvl;
3589         const char *snapname;
3590 };
3591
3592 static int
3593 zfs_check_snap_cb(zfs_handle_t *zhp, void *arg)
3594 {
3595         struct destroydata *dd = arg;
3596         char name[ZFS_MAX_DATASET_NAME_LEN];
3597         int rv = 0;
3598
3599         (void) snprintf(name, sizeof (name),
3600             "%s@%s", zhp->zfs_name, dd->snapname);
3601
3602         if (lzc_exists(name))
3603                 verify(nvlist_add_boolean(dd->nvl, name) == 0);
3604
3605         rv = zfs_iter_filesystems(zhp, zfs_check_snap_cb, dd);
3606         zfs_close(zhp);
3607         return (rv);
3608 }
3609
3610 /*
3611  * Destroys all snapshots with the given name in zhp & descendants.
3612  */
3613 int
3614 zfs_destroy_snaps(zfs_handle_t *zhp, char *snapname, boolean_t defer)
3615 {
3616         int ret;
3617         struct destroydata dd = { 0 };
3618
3619         dd.snapname = snapname;
3620         verify(nvlist_alloc(&dd.nvl, NV_UNIQUE_NAME, 0) == 0);
3621         (void) zfs_check_snap_cb(zfs_handle_dup(zhp), &dd);
3622
3623         if (nvlist_empty(dd.nvl)) {
3624                 ret = zfs_standard_error_fmt(zhp->zfs_hdl, ENOENT,
3625                     dgettext(TEXT_DOMAIN, "cannot destroy '%s@%s'"),
3626                     zhp->zfs_name, snapname);
3627         } else {
3628                 ret = zfs_destroy_snaps_nvl(zhp->zfs_hdl, dd.nvl, defer);
3629         }
3630         nvlist_free(dd.nvl);
3631         return (ret);
3632 }
3633
3634 /*
3635  * Destroys all the snapshots named in the nvlist.
3636  */
3637 int
3638 zfs_destroy_snaps_nvl(libzfs_handle_t *hdl, nvlist_t *snaps, boolean_t defer)
3639 {
3640         int ret;
3641         nvlist_t *errlist = NULL;
3642
3643         ret = lzc_destroy_snaps(snaps, defer, &errlist);
3644
3645         if (ret == 0) {
3646                 nvlist_free(errlist);
3647                 return (0);
3648         }
3649
3650         if (nvlist_empty(errlist)) {
3651                 char errbuf[1024];
3652                 (void) snprintf(errbuf, sizeof (errbuf),
3653                     dgettext(TEXT_DOMAIN, "cannot destroy snapshots"));
3654
3655                 ret = zfs_standard_error(hdl, ret, errbuf);
3656         }
3657         for (nvpair_t *pair = nvlist_next_nvpair(errlist, NULL);
3658             pair != NULL; pair = nvlist_next_nvpair(errlist, pair)) {
3659                 char errbuf[1024];
3660                 (void) snprintf(errbuf, sizeof (errbuf),
3661                     dgettext(TEXT_DOMAIN, "cannot destroy snapshot %s"),
3662                     nvpair_name(pair));
3663
3664                 switch (fnvpair_value_int32(pair)) {
3665                 case EEXIST:
3666                         zfs_error_aux(hdl,
3667                             dgettext(TEXT_DOMAIN, "snapshot is cloned"));
3668                         ret = zfs_error(hdl, EZFS_EXISTS, errbuf);
3669                         break;
3670                 default:
3671                         ret = zfs_standard_error(hdl, errno, errbuf);
3672                         break;
3673                 }
3674         }
3675
3676         nvlist_free(errlist);
3677         return (ret);
3678 }
3679
3680 /*
3681  * Clones the given dataset.  The target must be of the same type as the source.
3682  */
3683 int
3684 zfs_clone(zfs_handle_t *zhp, const char *target, nvlist_t *props)
3685 {
3686         char parent[ZFS_MAX_DATASET_NAME_LEN];
3687         int ret;
3688         char errbuf[1024];
3689         libzfs_handle_t *hdl = zhp->zfs_hdl;
3690         uint64_t zoned;
3691
3692         assert(zhp->zfs_type == ZFS_TYPE_SNAPSHOT);
3693
3694         (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3695             "cannot create '%s'"), target);
3696
3697         /* validate the target/clone name */
3698         if (!zfs_validate_name(hdl, target, ZFS_TYPE_FILESYSTEM, B_TRUE))
3699                 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3700
3701         /* validate parents exist */
3702         if (check_parents(hdl, target, &zoned, B_FALSE, NULL) != 0)
3703                 return (-1);
3704
3705         (void) parent_name(target, parent, sizeof (parent));
3706
3707         /* do the clone */
3708
3709         if (props) {
3710                 zfs_type_t type;
3711                 if (ZFS_IS_VOLUME(zhp)) {
3712                         type = ZFS_TYPE_VOLUME;
3713                 } else {
3714                         type = ZFS_TYPE_FILESYSTEM;
3715                 }
3716                 if ((props = zfs_valid_proplist(hdl, type, props, zoned,
3717                     zhp, zhp->zpool_hdl, errbuf)) == NULL)
3718                         return (-1);
3719         }
3720
3721         ret = lzc_clone(target, zhp->zfs_name, props);
3722         nvlist_free(props);
3723
3724         if (ret != 0) {
3725                 switch (errno) {
3726
3727                 case ENOENT:
3728                         /*
3729                          * The parent doesn't exist.  We should have caught this
3730                          * above, but there may a race condition that has since
3731                          * destroyed the parent.
3732                          *
3733                          * At this point, we don't know whether it's the source
3734                          * that doesn't exist anymore, or whether the target
3735                          * dataset doesn't exist.
3736                          */
3737                         zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN,
3738                             "no such parent '%s'"), parent);
3739                         return (zfs_error(zhp->zfs_hdl, EZFS_NOENT, errbuf));
3740
3741                 case EXDEV:
3742                         zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN,
3743                             "source and target pools differ"));
3744                         return (zfs_error(zhp->zfs_hdl, EZFS_CROSSTARGET,
3745                             errbuf));
3746
3747                 default:
3748                         return (zfs_standard_error(zhp->zfs_hdl, errno,
3749                             errbuf));
3750                 }
3751         }
3752
3753         return (ret);
3754 }
3755
3756 /*
3757  * Promotes the given clone fs to be the clone parent.
3758  */
3759 int
3760 zfs_promote(zfs_handle_t *zhp)
3761 {
3762         libzfs_handle_t *hdl = zhp->zfs_hdl;
3763         char snapname[ZFS_MAX_DATASET_NAME_LEN];
3764         int ret;
3765         char errbuf[1024];
3766
3767         (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3768             "cannot promote '%s'"), zhp->zfs_name);
3769
3770         if (zhp->zfs_type == ZFS_TYPE_SNAPSHOT) {
3771                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3772                     "snapshots can not be promoted"));
3773                 return (zfs_error(hdl, EZFS_BADTYPE, errbuf));
3774         }
3775
3776         if (zhp->zfs_dmustats.dds_origin[0] == '\0') {
3777                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3778                     "not a cloned filesystem"));
3779                 return (zfs_error(hdl, EZFS_BADTYPE, errbuf));
3780         }
3781
3782         ret = lzc_promote(zhp->zfs_name, snapname, sizeof (snapname));
3783
3784         if (ret != 0) {
3785                 switch (ret) {
3786                 case EEXIST:
3787                         /* There is a conflicting snapshot name. */
3788                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3789                             "conflicting snapshot '%s' from parent '%s'"),
3790                             snapname, zhp->zfs_dmustats.dds_origin);
3791                         return (zfs_error(hdl, EZFS_EXISTS, errbuf));
3792
3793                 default:
3794                         return (zfs_standard_error(hdl, ret, errbuf));
3795                 }
3796         }
3797         return (ret);
3798 }
3799
3800 typedef struct snapdata {
3801         nvlist_t *sd_nvl;
3802         const char *sd_snapname;
3803 } snapdata_t;
3804
3805 static int
3806 zfs_snapshot_cb(zfs_handle_t *zhp, void *arg)
3807 {
3808         snapdata_t *sd = arg;
3809         char name[ZFS_MAX_DATASET_NAME_LEN];
3810         int rv = 0;
3811
3812         if (zfs_prop_get_int(zhp, ZFS_PROP_INCONSISTENT) == 0) {
3813                 (void) snprintf(name, sizeof (name),
3814                     "%s@%s", zfs_get_name(zhp), sd->sd_snapname);
3815
3816                 fnvlist_add_boolean(sd->sd_nvl, name);
3817
3818                 rv = zfs_iter_filesystems(zhp, zfs_snapshot_cb, sd);
3819         }
3820         zfs_close(zhp);
3821
3822         return (rv);
3823 }
3824
3825 /*
3826  * Creates snapshots.  The keys in the snaps nvlist are the snapshots to be
3827  * created.
3828  */
3829 int
3830 zfs_snapshot_nvl(libzfs_handle_t *hdl, nvlist_t *snaps, nvlist_t *props)
3831 {
3832         int ret;
3833         char errbuf[1024];
3834         nvpair_t *elem;
3835         nvlist_t *errors;
3836
3837         (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3838             "cannot create snapshots "));
3839
3840         elem = NULL;
3841         while ((elem = nvlist_next_nvpair(snaps, elem)) != NULL) {
3842                 const char *snapname = nvpair_name(elem);
3843
3844                 /* validate the target name */
3845                 if (!zfs_validate_name(hdl, snapname, ZFS_TYPE_SNAPSHOT,
3846                     B_TRUE)) {
3847                         (void) snprintf(errbuf, sizeof (errbuf),
3848                             dgettext(TEXT_DOMAIN,
3849                             "cannot create snapshot '%s'"), snapname);
3850                         return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3851                 }
3852         }
3853
3854         /*
3855          * get pool handle for prop validation. assumes all snaps are in the
3856          * same pool, as does lzc_snapshot (below).
3857          */
3858         char pool[ZFS_MAX_DATASET_NAME_LEN];
3859         elem = nvlist_next_nvpair(snaps, NULL);
3860         (void) strlcpy(pool, nvpair_name(elem), sizeof (pool));
3861         pool[strcspn(pool, "/@")] = '\0';
3862         zpool_handle_t *zpool_hdl = zpool_open(hdl, pool);
3863
3864         if (props != NULL &&
3865             (props = zfs_valid_proplist(hdl, ZFS_TYPE_SNAPSHOT,
3866             props, B_FALSE, NULL, zpool_hdl, errbuf)) == NULL) {
3867                 zpool_close(zpool_hdl);
3868                 return (-1);
3869         }
3870         zpool_close(zpool_hdl);
3871
3872         ret = lzc_snapshot(snaps, props, &errors);
3873
3874         if (ret != 0) {
3875                 boolean_t printed = B_FALSE;
3876                 for (elem = nvlist_next_nvpair(errors, NULL);
3877                     elem != NULL;
3878                     elem = nvlist_next_nvpair(errors, elem)) {
3879                         (void) snprintf(errbuf, sizeof (errbuf),
3880                             dgettext(TEXT_DOMAIN,
3881                             "cannot create snapshot '%s'"), nvpair_name(elem));
3882                         (void) zfs_standard_error(hdl,
3883                             fnvpair_value_int32(elem), errbuf);
3884                         printed = B_TRUE;
3885                 }
3886                 if (!printed) {
3887                         switch (ret) {
3888                         case EXDEV:
3889                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
3890                                     "multiple snapshots of same "
3891                                     "fs not allowed"));
3892                                 (void) zfs_error(hdl, EZFS_EXISTS, errbuf);
3893
3894                                 break;
3895                         default:
3896                                 (void) zfs_standard_error(hdl, ret, errbuf);
3897                         }
3898                 }
3899         }
3900
3901         nvlist_free(props);
3902         nvlist_free(errors);
3903         return (ret);
3904 }
3905
3906 int
3907 zfs_snapshot(libzfs_handle_t *hdl, const char *path, boolean_t recursive,
3908     nvlist_t *props)
3909 {
3910         int ret;
3911         snapdata_t sd = { 0 };
3912         char fsname[ZFS_MAX_DATASET_NAME_LEN];
3913         char *cp;
3914         zfs_handle_t *zhp;
3915         char errbuf[1024];
3916
3917         (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
3918             "cannot snapshot %s"), path);
3919
3920         if (!zfs_validate_name(hdl, path, ZFS_TYPE_SNAPSHOT, B_TRUE))
3921                 return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
3922
3923         (void) strlcpy(fsname, path, sizeof (fsname));
3924         cp = strchr(fsname, '@');
3925         *cp = '\0';
3926         sd.sd_snapname = cp + 1;
3927
3928         if ((zhp = zfs_open(hdl, fsname, ZFS_TYPE_FILESYSTEM |
3929             ZFS_TYPE_VOLUME)) == NULL) {
3930                 return (-1);
3931         }
3932
3933         verify(nvlist_alloc(&sd.sd_nvl, NV_UNIQUE_NAME, 0) == 0);
3934         if (recursive) {
3935                 (void) zfs_snapshot_cb(zfs_handle_dup(zhp), &sd);
3936         } else {
3937                 fnvlist_add_boolean(sd.sd_nvl, path);
3938         }
3939
3940         ret = zfs_snapshot_nvl(hdl, sd.sd_nvl, props);
3941         nvlist_free(sd.sd_nvl);
3942         zfs_close(zhp);
3943         return (ret);
3944 }
3945
3946 /*
3947  * Destroy any more recent snapshots.  We invoke this callback on any dependents
3948  * of the snapshot first.  If the 'cb_dependent' member is non-zero, then this
3949  * is a dependent and we should just destroy it without checking the transaction
3950  * group.
3951  */
3952 typedef struct rollback_data {
3953         const char      *cb_target;             /* the snapshot */
3954         uint64_t        cb_create;              /* creation time reference */
3955         boolean_t       cb_error;
3956         boolean_t       cb_force;
3957 } rollback_data_t;
3958
3959 static int
3960 rollback_destroy_dependent(zfs_handle_t *zhp, void *data)
3961 {
3962         rollback_data_t *cbp = data;
3963         prop_changelist_t *clp;
3964
3965         /* We must destroy this clone; first unmount it */
3966         clp = changelist_gather(zhp, ZFS_PROP_NAME, 0,
3967             cbp->cb_force ? MS_FORCE: 0);
3968         if (clp == NULL || changelist_prefix(clp) != 0) {
3969                 cbp->cb_error = B_TRUE;
3970                 zfs_close(zhp);
3971                 return (0);
3972         }
3973         if (zfs_destroy(zhp, B_FALSE) != 0)
3974                 cbp->cb_error = B_TRUE;
3975         else
3976                 changelist_remove(clp, zhp->zfs_name);
3977         (void) changelist_postfix(clp);
3978         changelist_free(clp);
3979
3980         zfs_close(zhp);
3981         return (0);
3982 }
3983
3984 static int
3985 rollback_destroy(zfs_handle_t *zhp, void *data)
3986 {
3987         rollback_data_t *cbp = data;
3988
3989         if (zfs_prop_get_int(zhp, ZFS_PROP_CREATETXG) > cbp->cb_create) {
3990                 cbp->cb_error |= zfs_iter_dependents(zhp, B_FALSE,
3991                     rollback_destroy_dependent, cbp);
3992
3993                 cbp->cb_error |= zfs_destroy(zhp, B_FALSE);
3994         }
3995
3996         zfs_close(zhp);
3997         return (0);
3998 }
3999
4000 /*
4001  * Given a dataset, rollback to a specific snapshot, discarding any
4002  * data changes since then and making it the active dataset.
4003  *
4004  * Any snapshots and bookmarks more recent than the target are
4005  * destroyed, along with their dependents (i.e. clones).
4006  */
4007 int
4008 zfs_rollback(zfs_handle_t *zhp, zfs_handle_t *snap, boolean_t force)
4009 {
4010         rollback_data_t cb = { 0 };
4011         int err;
4012         boolean_t restore_resv = 0;
4013         uint64_t old_volsize = 0, new_volsize;
4014         zfs_prop_t resv_prop;
4015
4016         assert(zhp->zfs_type == ZFS_TYPE_FILESYSTEM ||
4017             zhp->zfs_type == ZFS_TYPE_VOLUME);
4018
4019         /*
4020          * Destroy all recent snapshots and their dependents.
4021          */
4022         cb.cb_force = force;
4023         cb.cb_target = snap->zfs_name;
4024         cb.cb_create = zfs_prop_get_int(snap, ZFS_PROP_CREATETXG);
4025         (void) zfs_iter_snapshots(zhp, B_FALSE, rollback_destroy, &cb);
4026         (void) zfs_iter_bookmarks(zhp, rollback_destroy, &cb);
4027
4028         if (cb.cb_error)
4029                 return (-1);
4030
4031         /*
4032          * Now that we have verified that the snapshot is the latest,
4033          * rollback to the given snapshot.
4034          */
4035
4036         if (zhp->zfs_type == ZFS_TYPE_VOLUME) {
4037                 if (zfs_which_resv_prop(zhp, &resv_prop) < 0)
4038                         return (-1);
4039                 old_volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE);
4040                 restore_resv =
4041                     (old_volsize == zfs_prop_get_int(zhp, resv_prop));
4042         }
4043
4044         /*
4045          * Pass both the filesystem and the wanted snapshot names,
4046          * we would get an error back if the snapshot is destroyed or
4047          * a new snapshot is created before this request is processed.
4048          */
4049         err = lzc_rollback_to(zhp->zfs_name, snap->zfs_name);
4050         if (err == EXDEV) {
4051                 zfs_error_aux(zhp->zfs_hdl, dgettext(TEXT_DOMAIN,
4052                     "'%s' is not the latest snapshot"), snap->zfs_name);
4053                 (void) zfs_error_fmt(zhp->zfs_hdl, EZFS_BUSY,
4054                     dgettext(TEXT_DOMAIN, "cannot rollback '%s'"),
4055                     zhp->zfs_name);
4056                 return (err);
4057         } else if (err != 0) {
4058                 (void) zfs_standard_error_fmt(zhp->zfs_hdl, errno,
4059                     dgettext(TEXT_DOMAIN, "cannot rollback '%s'"),
4060                     zhp->zfs_name);
4061                 return (err);
4062         }
4063
4064         /*
4065          * For volumes, if the pre-rollback volsize matched the pre-
4066          * rollback reservation and the volsize has changed then set
4067          * the reservation property to the post-rollback volsize.
4068          * Make a new handle since the rollback closed the dataset.
4069          */
4070         if ((zhp->zfs_type == ZFS_TYPE_VOLUME) &&
4071             (zhp = make_dataset_handle(zhp->zfs_hdl, zhp->zfs_name))) {
4072                 if (restore_resv) {
4073                         new_volsize = zfs_prop_get_int(zhp, ZFS_PROP_VOLSIZE);
4074                         if (old_volsize != new_volsize)
4075                                 err = zfs_prop_set_int(zhp, resv_prop,
4076                                     new_volsize);
4077                 }
4078                 zfs_close(zhp);
4079         }
4080         return (err);
4081 }
4082
4083 /*
4084  * Renames the given dataset.
4085  */
4086 int
4087 zfs_rename(zfs_handle_t *zhp, const char *source, const char *target,
4088     renameflags_t flags)
4089 {
4090         int ret = 0;
4091         zfs_cmd_t zc = { 0 };
4092         char *delim;
4093         prop_changelist_t *cl = NULL;
4094         zfs_handle_t *zhrp = NULL;
4095         char *parentname = NULL;
4096         char parent[ZFS_MAX_DATASET_NAME_LEN];
4097         char property[ZFS_MAXPROPLEN];
4098         libzfs_handle_t *hdl = zhp->zfs_hdl;
4099         char errbuf[1024];
4100
4101         /* if we have the same exact name, just return success */
4102         if (strcmp(zhp->zfs_name, target) == 0)
4103                 return (0);
4104
4105         (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
4106             "cannot rename to '%s'"), target);
4107
4108         if (source != NULL) {
4109                 /*
4110                  * This is recursive snapshots rename, put snapshot name
4111                  * (that might not exist) into zfs_name.
4112                  */
4113                 assert(flags.recurse);
4114
4115                 (void) strlcat(zhp->zfs_name, "@", sizeof(zhp->zfs_name));
4116                 (void) strlcat(zhp->zfs_name, source, sizeof(zhp->zfs_name));
4117                 zhp->zfs_type = ZFS_TYPE_SNAPSHOT;
4118         }
4119
4120         /*
4121          * Make sure the target name is valid
4122          */
4123         if (zhp->zfs_type == ZFS_TYPE_SNAPSHOT) {
4124                 if ((strchr(target, '@') == NULL) ||
4125                     *target == '@') {
4126                         /*
4127                          * Snapshot target name is abbreviated,
4128                          * reconstruct full dataset name
4129                          */
4130                         (void) strlcpy(parent, zhp->zfs_name,
4131                             sizeof (parent));
4132                         delim = strchr(parent, '@');
4133                         if (strchr(target, '@') == NULL)
4134                                 *(++delim) = '\0';
4135                         else
4136                                 *delim = '\0';
4137                         (void) strlcat(parent, target, sizeof (parent));
4138                         target = parent;
4139                 } else {
4140                         /*
4141                          * Make sure we're renaming within the same dataset.
4142                          */
4143                         delim = strchr(target, '@');
4144                         if (strncmp(zhp->zfs_name, target, delim - target)
4145                             != 0 || zhp->zfs_name[delim - target] != '@') {
4146                                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4147                                     "snapshots must be part of same "
4148                                     "dataset"));
4149                                 return (zfs_error(hdl, EZFS_CROSSTARGET,
4150                                     errbuf));
4151                         }
4152                 }
4153                 if (!zfs_validate_name(hdl, target, zhp->zfs_type, B_TRUE))
4154                         return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
4155         } else {
4156                 if (flags.recurse) {
4157                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4158                             "recursive rename must be a snapshot"));
4159                         return (zfs_error(hdl, EZFS_BADTYPE, errbuf));
4160                 }
4161
4162                 if (!zfs_validate_name(hdl, target, zhp->zfs_type, B_TRUE))
4163                         return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
4164
4165                 /* validate parents */
4166                 if (check_parents(hdl, target, NULL, B_FALSE, NULL) != 0)
4167                         return (-1);
4168
4169                 /* make sure we're in the same pool */
4170                 verify((delim = strchr(target, '/')) != NULL);
4171                 if (strncmp(zhp->zfs_name, target, delim - target) != 0 ||
4172                     zhp->zfs_name[delim - target] != '/') {
4173                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4174                             "datasets must be within same pool"));
4175                         return (zfs_error(hdl, EZFS_CROSSTARGET, errbuf));
4176                 }
4177
4178                 /* new name cannot be a child of the current dataset name */
4179                 if (is_descendant(zhp->zfs_name, target)) {
4180                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4181                             "New dataset name cannot be a descendant of "
4182                             "current dataset name"));
4183                         return (zfs_error(hdl, EZFS_INVALIDNAME, errbuf));
4184                 }
4185         }
4186
4187         (void) snprintf(errbuf, sizeof (errbuf),
4188             dgettext(TEXT_DOMAIN, "cannot rename '%s'"), zhp->zfs_name);
4189
4190         if (getzoneid() == GLOBAL_ZONEID &&
4191             zfs_prop_get_int(zhp, ZFS_PROP_ZONED)) {
4192                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4193                     "dataset is used in a non-global zone"));
4194                 return (zfs_error(hdl, EZFS_ZONED, errbuf));
4195         }
4196
4197         /*
4198          * Avoid unmounting file systems with mountpoint property set to
4199          * 'legacy' or 'none' even if -u option is not given.
4200          */
4201         if (zhp->zfs_type == ZFS_TYPE_FILESYSTEM &&
4202             !flags.recurse && !flags.nounmount &&
4203             zfs_prop_get(zhp, ZFS_PROP_MOUNTPOINT, property,
4204             sizeof (property), NULL, NULL, 0, B_FALSE) == 0 &&
4205             (strcmp(property, "legacy") == 0 ||
4206              strcmp(property, "none") == 0)) {
4207                 flags.nounmount = B_TRUE;
4208         }
4209         if (flags.recurse) {
4210
4211                 parentname = zfs_strdup(zhp->zfs_hdl, zhp->zfs_name);
4212                 if (parentname == NULL) {
4213                         ret = -1;
4214                         goto error;
4215                 }
4216                 delim = strchr(parentname, '@');
4217                 *delim = '\0';
4218                 zhrp = zfs_open(zhp->zfs_hdl, parentname, ZFS_TYPE_DATASET);
4219                 if (zhrp == NULL) {
4220                         ret = -1;
4221                         goto error;
4222                 }
4223         } else if (zhp->zfs_type != ZFS_TYPE_SNAPSHOT) {
4224                 if ((cl = changelist_gather(zhp, ZFS_PROP_NAME,
4225                     flags.nounmount ? CL_GATHER_DONT_UNMOUNT : 0,
4226                     flags.forceunmount ? MS_FORCE : 0)) == NULL) {
4227                         return (-1);
4228                 }
4229
4230                 if (changelist_haszonedchild(cl)) {
4231                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4232                             "child dataset with inherited mountpoint is used "
4233                             "in a non-global zone"));
4234                         (void) zfs_error(hdl, EZFS_ZONED, errbuf);
4235                         ret = -1;
4236                         goto error;
4237                 }
4238
4239                 if ((ret = changelist_prefix(cl)) != 0)
4240                         goto error;
4241         }
4242
4243         if (ZFS_IS_VOLUME(zhp))
4244                 zc.zc_objset_type = DMU_OST_ZVOL;
4245         else
4246                 zc.zc_objset_type = DMU_OST_ZFS;
4247
4248         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
4249         (void) strlcpy(zc.zc_value, target, sizeof (zc.zc_value));
4250
4251         zc.zc_cookie = flags.recurse ? 1 : 0;
4252         if (flags.nounmount)
4253                 zc.zc_cookie |= 2;
4254
4255         if ((ret = zfs_ioctl(zhp->zfs_hdl, ZFS_IOC_RENAME, &zc)) != 0) {
4256                 /*
4257                  * if it was recursive, the one that actually failed will
4258                  * be in zc.zc_name
4259                  */
4260                 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
4261                     "cannot rename '%s'"), zc.zc_name);
4262
4263                 if (flags.recurse && errno == EEXIST) {
4264                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4265                             "a child dataset already has a snapshot "
4266                             "with the new name"));
4267                         (void) zfs_error(hdl, EZFS_EXISTS, errbuf);
4268                 } else {
4269                         (void) zfs_standard_error(zhp->zfs_hdl, errno, errbuf);
4270                 }
4271
4272                 /*
4273                  * On failure, we still want to remount any filesystems that
4274                  * were previously mounted, so we don't alter the system state.
4275                  */
4276                 if (cl != NULL)
4277                         (void) changelist_postfix(cl);
4278         } else {
4279                 if (cl != NULL) {
4280                         changelist_rename(cl, zfs_get_name(zhp), target);
4281                         ret = changelist_postfix(cl);
4282                 }
4283         }
4284
4285 error:
4286         if (parentname != NULL) {
4287                 free(parentname);
4288         }
4289         if (zhrp != NULL) {
4290                 zfs_close(zhrp);
4291         }
4292         if (cl != NULL) {
4293                 changelist_free(cl);
4294         }
4295         return (ret);
4296 }
4297
4298 nvlist_t *
4299 zfs_get_user_props(zfs_handle_t *zhp)
4300 {
4301         return (zhp->zfs_user_props);
4302 }
4303
4304 nvlist_t *
4305 zfs_get_recvd_props(zfs_handle_t *zhp)
4306 {
4307         if (zhp->zfs_recvd_props == NULL)
4308                 if (get_recvd_props_ioctl(zhp) != 0)
4309                         return (NULL);
4310         return (zhp->zfs_recvd_props);
4311 }
4312
4313 /*
4314  * This function is used by 'zfs list' to determine the exact set of columns to
4315  * display, and their maximum widths.  This does two main things:
4316  *
4317  *      - If this is a list of all properties, then expand the list to include
4318  *        all native properties, and set a flag so that for each dataset we look
4319  *        for new unique user properties and add them to the list.
4320  *
4321  *      - For non fixed-width properties, keep track of the maximum width seen
4322  *        so that we can size the column appropriately. If the user has
4323  *        requested received property values, we also need to compute the width
4324  *        of the RECEIVED column.
4325  */
4326 int
4327 zfs_expand_proplist(zfs_handle_t *zhp, zprop_list_t **plp, boolean_t received,
4328     boolean_t literal)
4329 {
4330         libzfs_handle_t *hdl = zhp->zfs_hdl;
4331         zprop_list_t *entry;
4332         zprop_list_t **last, **start;
4333         nvlist_t *userprops, *propval;
4334         nvpair_t *elem;
4335         char *strval;
4336         char buf[ZFS_MAXPROPLEN];
4337
4338         if (zprop_expand_list(hdl, plp, ZFS_TYPE_DATASET) != 0)
4339                 return (-1);
4340
4341         userprops = zfs_get_user_props(zhp);
4342
4343         entry = *plp;
4344         if (entry->pl_all && nvlist_next_nvpair(userprops, NULL) != NULL) {
4345                 /*
4346                  * Go through and add any user properties as necessary.  We
4347                  * start by incrementing our list pointer to the first
4348                  * non-native property.
4349                  */
4350                 start = plp;
4351                 while (*start != NULL) {
4352                         if ((*start)->pl_prop == ZPROP_INVAL)
4353                                 break;
4354                         start = &(*start)->pl_next;
4355                 }
4356
4357                 elem = NULL;
4358                 while ((elem = nvlist_next_nvpair(userprops, elem)) != NULL) {
4359                         /*
4360                          * See if we've already found this property in our list.
4361                          */
4362                         for (last = start; *last != NULL;
4363                             last = &(*last)->pl_next) {
4364                                 if (strcmp((*last)->pl_user_prop,
4365                                     nvpair_name(elem)) == 0)
4366                                         break;
4367                         }
4368
4369                         if (*last == NULL) {
4370                                 if ((entry = zfs_alloc(hdl,
4371                                     sizeof (zprop_list_t))) == NULL ||
4372                                     ((entry->pl_user_prop = zfs_strdup(hdl,
4373                                     nvpair_name(elem)))) == NULL) {
4374                                         free(entry);
4375                                         return (-1);
4376                                 }
4377
4378                                 entry->pl_prop = ZPROP_INVAL;
4379                                 entry->pl_width = strlen(nvpair_name(elem));
4380                                 entry->pl_all = B_TRUE;
4381                                 *last = entry;
4382                         }
4383                 }
4384         }
4385
4386         /*
4387          * Now go through and check the width of any non-fixed columns
4388          */
4389         for (entry = *plp; entry != NULL; entry = entry->pl_next) {
4390                 if (entry->pl_fixed && !literal)
4391                         continue;
4392
4393                 if (entry->pl_prop != ZPROP_INVAL) {
4394                         if (zfs_prop_get(zhp, entry->pl_prop,
4395                             buf, sizeof (buf), NULL, NULL, 0, literal) == 0) {
4396                                 if (strlen(buf) > entry->pl_width)
4397                                         entry->pl_width = strlen(buf);
4398                         }
4399                         if (received && zfs_prop_get_recvd(zhp,
4400                             zfs_prop_to_name(entry->pl_prop),
4401                             buf, sizeof (buf), literal) == 0)
4402                                 if (strlen(buf) > entry->pl_recvd_width)
4403                                         entry->pl_recvd_width = strlen(buf);
4404                 } else {
4405                         if (nvlist_lookup_nvlist(userprops, entry->pl_user_prop,
4406                             &propval) == 0) {
4407                                 verify(nvlist_lookup_string(propval,
4408                                     ZPROP_VALUE, &strval) == 0);
4409                                 if (strlen(strval) > entry->pl_width)
4410                                         entry->pl_width = strlen(strval);
4411                         }
4412                         if (received && zfs_prop_get_recvd(zhp,
4413                             entry->pl_user_prop,
4414                             buf, sizeof (buf), literal) == 0)
4415                                 if (strlen(buf) > entry->pl_recvd_width)
4416                                         entry->pl_recvd_width = strlen(buf);
4417                 }
4418         }
4419
4420         return (0);
4421 }
4422
4423 int
4424 zfs_deleg_share_nfs(libzfs_handle_t *hdl, char *dataset, char *path,
4425     char *resource, void *export, void *sharetab,
4426     int sharemax, zfs_share_op_t operation)
4427 {
4428         zfs_cmd_t zc = { 0 };
4429         int error;
4430
4431         (void) strlcpy(zc.zc_name, dataset, sizeof (zc.zc_name));
4432         (void) strlcpy(zc.zc_value, path, sizeof (zc.zc_value));
4433         if (resource)
4434                 (void) strlcpy(zc.zc_string, resource, sizeof (zc.zc_string));
4435         zc.zc_share.z_sharedata = (uint64_t)(uintptr_t)sharetab;
4436         zc.zc_share.z_exportdata = (uint64_t)(uintptr_t)export;
4437         zc.zc_share.z_sharetype = operation;
4438         zc.zc_share.z_sharemax = sharemax;
4439         error = ioctl(hdl->libzfs_fd, ZFS_IOC_SHARE, &zc);
4440         return (error);
4441 }
4442
4443 void
4444 zfs_prune_proplist(zfs_handle_t *zhp, uint8_t *props)
4445 {
4446         nvpair_t *curr;
4447
4448         /*
4449          * Keep a reference to the props-table against which we prune the
4450          * properties.
4451          */
4452         zhp->zfs_props_table = props;
4453
4454         curr = nvlist_next_nvpair(zhp->zfs_props, NULL);
4455
4456         while (curr) {
4457                 zfs_prop_t zfs_prop = zfs_name_to_prop(nvpair_name(curr));
4458                 nvpair_t *next = nvlist_next_nvpair(zhp->zfs_props, curr);
4459
4460                 /*
4461                  * User properties will result in ZPROP_INVAL, and since we
4462                  * only know how to prune standard ZFS properties, we always
4463                  * leave these in the list.  This can also happen if we
4464                  * encounter an unknown DSL property (when running older
4465                  * software, for example).
4466                  */
4467                 if (zfs_prop != ZPROP_INVAL && props[zfs_prop] == B_FALSE)
4468                         (void) nvlist_remove(zhp->zfs_props,
4469                             nvpair_name(curr), nvpair_type(curr));
4470                 curr = next;
4471         }
4472 }
4473
4474 #ifdef illumos
4475 static int
4476 zfs_smb_acl_mgmt(libzfs_handle_t *hdl, char *dataset, char *path,
4477     zfs_smb_acl_op_t cmd, char *resource1, char *resource2)
4478 {
4479         zfs_cmd_t zc = { 0 };
4480         nvlist_t *nvlist = NULL;
4481         int error;
4482
4483         (void) strlcpy(zc.zc_name, dataset, sizeof (zc.zc_name));
4484         (void) strlcpy(zc.zc_value, path, sizeof (zc.zc_value));
4485         zc.zc_cookie = (uint64_t)cmd;
4486
4487         if (cmd == ZFS_SMB_ACL_RENAME) {
4488                 if (nvlist_alloc(&nvlist, NV_UNIQUE_NAME, 0) != 0) {
4489                         (void) no_memory(hdl);
4490                         return (0);
4491                 }
4492         }
4493
4494         switch (cmd) {
4495         case ZFS_SMB_ACL_ADD:
4496         case ZFS_SMB_ACL_REMOVE:
4497                 (void) strlcpy(zc.zc_string, resource1, sizeof (zc.zc_string));
4498                 break;
4499         case ZFS_SMB_ACL_RENAME:
4500                 if (nvlist_add_string(nvlist, ZFS_SMB_ACL_SRC,
4501                     resource1) != 0) {
4502                                 (void) no_memory(hdl);
4503                                 return (-1);
4504                 }
4505                 if (nvlist_add_string(nvlist, ZFS_SMB_ACL_TARGET,
4506                     resource2) != 0) {
4507                                 (void) no_memory(hdl);
4508                                 return (-1);
4509                 }
4510                 if (zcmd_write_src_nvlist(hdl, &zc, nvlist) != 0) {
4511                         nvlist_free(nvlist);
4512                         return (-1);
4513                 }
4514                 break;
4515         case ZFS_SMB_ACL_PURGE:
4516                 break;
4517         default:
4518                 return (-1);
4519         }
4520         error = ioctl(hdl->libzfs_fd, ZFS_IOC_SMB_ACL, &zc);
4521         nvlist_free(nvlist);
4522         return (error);
4523 }
4524
4525 int
4526 zfs_smb_acl_add(libzfs_handle_t *hdl, char *dataset,
4527     char *path, char *resource)
4528 {
4529         return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_ADD,
4530             resource, NULL));
4531 }
4532
4533 int
4534 zfs_smb_acl_remove(libzfs_handle_t *hdl, char *dataset,
4535     char *path, char *resource)
4536 {
4537         return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_REMOVE,
4538             resource, NULL));
4539 }
4540
4541 int
4542 zfs_smb_acl_purge(libzfs_handle_t *hdl, char *dataset, char *path)
4543 {
4544         return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_PURGE,
4545             NULL, NULL));
4546 }
4547
4548 int
4549 zfs_smb_acl_rename(libzfs_handle_t *hdl, char *dataset, char *path,
4550     char *oldname, char *newname)
4551 {
4552         return (zfs_smb_acl_mgmt(hdl, dataset, path, ZFS_SMB_ACL_RENAME,
4553             oldname, newname));
4554 }
4555 #endif  /* illumos */
4556
4557 int
4558 zfs_userspace(zfs_handle_t *zhp, zfs_userquota_prop_t type,
4559     zfs_userspace_cb_t func, void *arg)
4560 {
4561         zfs_cmd_t zc = { 0 };
4562         zfs_useracct_t buf[100];
4563         libzfs_handle_t *hdl = zhp->zfs_hdl;
4564         int ret;
4565
4566         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
4567
4568         zc.zc_objset_type = type;
4569         zc.zc_nvlist_dst = (uintptr_t)buf;
4570
4571         for (;;) {
4572                 zfs_useracct_t *zua = buf;
4573
4574                 zc.zc_nvlist_dst_size = sizeof (buf);
4575                 if (zfs_ioctl(hdl, ZFS_IOC_USERSPACE_MANY, &zc) != 0) {
4576                         char errbuf[1024];
4577
4578                         (void) snprintf(errbuf, sizeof (errbuf),
4579                             dgettext(TEXT_DOMAIN,
4580                             "cannot get used/quota for %s"), zc.zc_name);
4581                         return (zfs_standard_error_fmt(hdl, errno, errbuf));
4582                 }
4583                 if (zc.zc_nvlist_dst_size == 0)
4584                         break;
4585
4586                 while (zc.zc_nvlist_dst_size > 0) {
4587                         if ((ret = func(arg, zua->zu_domain, zua->zu_rid,
4588                             zua->zu_space)) != 0)
4589                                 return (ret);
4590                         zua++;
4591                         zc.zc_nvlist_dst_size -= sizeof (zfs_useracct_t);
4592                 }
4593         }
4594
4595         return (0);
4596 }
4597
4598 struct holdarg {
4599         nvlist_t *nvl;
4600         const char *snapname;
4601         const char *tag;
4602         boolean_t recursive;
4603         int error;
4604 };
4605
4606 static int
4607 zfs_hold_one(zfs_handle_t *zhp, void *arg)
4608 {
4609         struct holdarg *ha = arg;
4610         char name[ZFS_MAX_DATASET_NAME_LEN];
4611         int rv = 0;
4612
4613         (void) snprintf(name, sizeof (name),
4614             "%s@%s", zhp->zfs_name, ha->snapname);
4615
4616         if (lzc_exists(name))
4617                 fnvlist_add_string(ha->nvl, name, ha->tag);
4618
4619         if (ha->recursive)
4620                 rv = zfs_iter_filesystems(zhp, zfs_hold_one, ha);
4621         zfs_close(zhp);
4622         return (rv);
4623 }
4624
4625 int
4626 zfs_hold(zfs_handle_t *zhp, const char *snapname, const char *tag,
4627     boolean_t recursive, int cleanup_fd)
4628 {
4629         int ret;
4630         struct holdarg ha;
4631
4632         ha.nvl = fnvlist_alloc();
4633         ha.snapname = snapname;
4634         ha.tag = tag;
4635         ha.recursive = recursive;
4636         (void) zfs_hold_one(zfs_handle_dup(zhp), &ha);
4637
4638         if (nvlist_empty(ha.nvl)) {
4639                 char errbuf[1024];
4640
4641                 fnvlist_free(ha.nvl);
4642                 ret = ENOENT;
4643                 (void) snprintf(errbuf, sizeof (errbuf),
4644                     dgettext(TEXT_DOMAIN,
4645                     "cannot hold snapshot '%s@%s'"),
4646                     zhp->zfs_name, snapname);
4647                 (void) zfs_standard_error(zhp->zfs_hdl, ret, errbuf);
4648                 return (ret);
4649         }
4650
4651         ret = zfs_hold_nvl(zhp, cleanup_fd, ha.nvl);
4652         fnvlist_free(ha.nvl);
4653
4654         return (ret);
4655 }
4656
4657 int
4658 zfs_hold_nvl(zfs_handle_t *zhp, int cleanup_fd, nvlist_t *holds)
4659 {
4660         int ret;
4661         nvlist_t *errors;
4662         libzfs_handle_t *hdl = zhp->zfs_hdl;
4663         char errbuf[1024];
4664         nvpair_t *elem;
4665
4666         errors = NULL;
4667         ret = lzc_hold(holds, cleanup_fd, &errors);
4668
4669         if (ret == 0) {
4670                 /* There may be errors even in the success case. */
4671                 fnvlist_free(errors);
4672                 return (0);
4673         }
4674
4675         if (nvlist_empty(errors)) {
4676                 /* no hold-specific errors */
4677                 (void) snprintf(errbuf, sizeof (errbuf),
4678                     dgettext(TEXT_DOMAIN, "cannot hold"));
4679                 switch (ret) {
4680                 case ENOTSUP:
4681                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4682                             "pool must be upgraded"));
4683                         (void) zfs_error(hdl, EZFS_BADVERSION, errbuf);
4684                         break;
4685                 case EINVAL:
4686                         (void) zfs_error(hdl, EZFS_BADTYPE, errbuf);
4687                         break;
4688                 default:
4689                         (void) zfs_standard_error(hdl, ret, errbuf);
4690                 }
4691         }
4692
4693         for (elem = nvlist_next_nvpair(errors, NULL);
4694             elem != NULL;
4695             elem = nvlist_next_nvpair(errors, elem)) {
4696                 (void) snprintf(errbuf, sizeof (errbuf),
4697                     dgettext(TEXT_DOMAIN,
4698                     "cannot hold snapshot '%s'"), nvpair_name(elem));
4699                 switch (fnvpair_value_int32(elem)) {
4700                 case E2BIG:
4701                         /*
4702                          * Temporary tags wind up having the ds object id
4703                          * prepended. So even if we passed the length check
4704                          * above, it's still possible for the tag to wind
4705                          * up being slightly too long.
4706                          */
4707                         (void) zfs_error(hdl, EZFS_TAGTOOLONG, errbuf);
4708                         break;
4709                 case EINVAL:
4710                         (void) zfs_error(hdl, EZFS_BADTYPE, errbuf);
4711                         break;
4712                 case EEXIST:
4713                         (void) zfs_error(hdl, EZFS_REFTAG_HOLD, errbuf);
4714                         break;
4715                 default:
4716                         (void) zfs_standard_error(hdl,
4717                             fnvpair_value_int32(elem), errbuf);
4718                 }
4719         }
4720
4721         fnvlist_free(errors);
4722         return (ret);
4723 }
4724
4725 static int
4726 zfs_release_one(zfs_handle_t *zhp, void *arg)
4727 {
4728         struct holdarg *ha = arg;
4729         char name[ZFS_MAX_DATASET_NAME_LEN];
4730         int rv = 0;
4731         nvlist_t *existing_holds;
4732
4733         (void) snprintf(name, sizeof (name),
4734             "%s@%s", zhp->zfs_name, ha->snapname);
4735
4736         if (lzc_get_holds(name, &existing_holds) != 0) {
4737                 ha->error = ENOENT;
4738         } else if (!nvlist_exists(existing_holds, ha->tag)) {
4739                 ha->error = ESRCH;
4740         } else {
4741                 nvlist_t *torelease = fnvlist_alloc();
4742                 fnvlist_add_boolean(torelease, ha->tag);
4743                 fnvlist_add_nvlist(ha->nvl, name, torelease);
4744                 fnvlist_free(torelease);
4745         }
4746
4747         if (ha->recursive)
4748                 rv = zfs_iter_filesystems(zhp, zfs_release_one, ha);
4749         zfs_close(zhp);
4750         return (rv);
4751 }
4752
4753 int
4754 zfs_release(zfs_handle_t *zhp, const char *snapname, const char *tag,
4755     boolean_t recursive)
4756 {
4757         int ret;
4758         struct holdarg ha;
4759         nvlist_t *errors = NULL;
4760         nvpair_t *elem;
4761         libzfs_handle_t *hdl = zhp->zfs_hdl;
4762         char errbuf[1024];
4763
4764         ha.nvl = fnvlist_alloc();
4765         ha.snapname = snapname;
4766         ha.tag = tag;
4767         ha.recursive = recursive;
4768         ha.error = 0;
4769         (void) zfs_release_one(zfs_handle_dup(zhp), &ha);
4770
4771         if (nvlist_empty(ha.nvl)) {
4772                 fnvlist_free(ha.nvl);
4773                 ret = ha.error;
4774                 (void) snprintf(errbuf, sizeof (errbuf),
4775                     dgettext(TEXT_DOMAIN,
4776                     "cannot release hold from snapshot '%s@%s'"),
4777                     zhp->zfs_name, snapname);
4778                 if (ret == ESRCH) {
4779                         (void) zfs_error(hdl, EZFS_REFTAG_RELE, errbuf);
4780                 } else {
4781                         (void) zfs_standard_error(hdl, ret, errbuf);
4782                 }
4783                 return (ret);
4784         }
4785
4786         ret = lzc_release(ha.nvl, &errors);
4787         fnvlist_free(ha.nvl);
4788
4789         if (ret == 0) {
4790                 /* There may be errors even in the success case. */
4791                 fnvlist_free(errors);
4792                 return (0);
4793         }
4794
4795         if (nvlist_empty(errors)) {
4796                 /* no hold-specific errors */
4797                 (void) snprintf(errbuf, sizeof (errbuf), dgettext(TEXT_DOMAIN,
4798                     "cannot release"));
4799                 switch (errno) {
4800                 case ENOTSUP:
4801                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4802                             "pool must be upgraded"));
4803                         (void) zfs_error(hdl, EZFS_BADVERSION, errbuf);
4804                         break;
4805                 default:
4806                         (void) zfs_standard_error_fmt(hdl, errno, errbuf);
4807                 }
4808         }
4809
4810         for (elem = nvlist_next_nvpair(errors, NULL);
4811             elem != NULL;
4812             elem = nvlist_next_nvpair(errors, elem)) {
4813                 (void) snprintf(errbuf, sizeof (errbuf),
4814                     dgettext(TEXT_DOMAIN,
4815                     "cannot release hold from snapshot '%s'"),
4816                     nvpair_name(elem));
4817                 switch (fnvpair_value_int32(elem)) {
4818                 case ESRCH:
4819                         (void) zfs_error(hdl, EZFS_REFTAG_RELE, errbuf);
4820                         break;
4821                 case EINVAL:
4822                         (void) zfs_error(hdl, EZFS_BADTYPE, errbuf);
4823                         break;
4824                 default:
4825                         (void) zfs_standard_error_fmt(hdl,
4826                             fnvpair_value_int32(elem), errbuf);
4827                 }
4828         }
4829
4830         fnvlist_free(errors);
4831         return (ret);
4832 }
4833
4834 int
4835 zfs_get_fsacl(zfs_handle_t *zhp, nvlist_t **nvl)
4836 {
4837         zfs_cmd_t zc = { 0 };
4838         libzfs_handle_t *hdl = zhp->zfs_hdl;
4839         int nvsz = 2048;
4840         void *nvbuf;
4841         int err = 0;
4842         char errbuf[1024];
4843
4844         assert(zhp->zfs_type == ZFS_TYPE_VOLUME ||
4845             zhp->zfs_type == ZFS_TYPE_FILESYSTEM);
4846
4847 tryagain:
4848
4849         nvbuf = malloc(nvsz);
4850         if (nvbuf == NULL) {
4851                 err = (zfs_error(hdl, EZFS_NOMEM, strerror(errno)));
4852                 goto out;
4853         }
4854
4855         zc.zc_nvlist_dst_size = nvsz;
4856         zc.zc_nvlist_dst = (uintptr_t)nvbuf;
4857
4858         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
4859
4860         if (ioctl(hdl->libzfs_fd, ZFS_IOC_GET_FSACL, &zc) != 0) {
4861                 (void) snprintf(errbuf, sizeof (errbuf),
4862                     dgettext(TEXT_DOMAIN, "cannot get permissions on '%s'"),
4863                     zc.zc_name);
4864                 switch (errno) {
4865                 case ENOMEM:
4866                         free(nvbuf);
4867                         nvsz = zc.zc_nvlist_dst_size;
4868                         goto tryagain;
4869
4870                 case ENOTSUP:
4871                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4872                             "pool must be upgraded"));
4873                         err = zfs_error(hdl, EZFS_BADVERSION, errbuf);
4874                         break;
4875                 case EINVAL:
4876                         err = zfs_error(hdl, EZFS_BADTYPE, errbuf);
4877                         break;
4878                 case ENOENT:
4879                         err = zfs_error(hdl, EZFS_NOENT, errbuf);
4880                         break;
4881                 default:
4882                         err = zfs_standard_error_fmt(hdl, errno, errbuf);
4883                         break;
4884                 }
4885         } else {
4886                 /* success */
4887                 int rc = nvlist_unpack(nvbuf, zc.zc_nvlist_dst_size, nvl, 0);
4888                 if (rc) {
4889                         (void) snprintf(errbuf, sizeof (errbuf), dgettext(
4890                             TEXT_DOMAIN, "cannot get permissions on '%s'"),
4891                             zc.zc_name);
4892                         err = zfs_standard_error_fmt(hdl, rc, errbuf);
4893                 }
4894         }
4895
4896         free(nvbuf);
4897 out:
4898         return (err);
4899 }
4900
4901 int
4902 zfs_set_fsacl(zfs_handle_t *zhp, boolean_t un, nvlist_t *nvl)
4903 {
4904         zfs_cmd_t zc = { 0 };
4905         libzfs_handle_t *hdl = zhp->zfs_hdl;
4906         char *nvbuf;
4907         char errbuf[1024];
4908         size_t nvsz;
4909         int err;
4910
4911         assert(zhp->zfs_type == ZFS_TYPE_VOLUME ||
4912             zhp->zfs_type == ZFS_TYPE_FILESYSTEM);
4913
4914         err = nvlist_size(nvl, &nvsz, NV_ENCODE_NATIVE);
4915         assert(err == 0);
4916
4917         nvbuf = malloc(nvsz);
4918
4919         err = nvlist_pack(nvl, &nvbuf, &nvsz, NV_ENCODE_NATIVE, 0);
4920         assert(err == 0);
4921
4922         zc.zc_nvlist_src_size = nvsz;
4923         zc.zc_nvlist_src = (uintptr_t)nvbuf;
4924         zc.zc_perm_action = un;
4925
4926         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
4927
4928         if (zfs_ioctl(hdl, ZFS_IOC_SET_FSACL, &zc) != 0) {
4929                 (void) snprintf(errbuf, sizeof (errbuf),
4930                     dgettext(TEXT_DOMAIN, "cannot set permissions on '%s'"),
4931                     zc.zc_name);
4932                 switch (errno) {
4933                 case ENOTSUP:
4934                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4935                             "pool must be upgraded"));
4936                         err = zfs_error(hdl, EZFS_BADVERSION, errbuf);
4937                         break;
4938                 case EINVAL:
4939                         err = zfs_error(hdl, EZFS_BADTYPE, errbuf);
4940                         break;
4941                 case ENOENT:
4942                         err = zfs_error(hdl, EZFS_NOENT, errbuf);
4943                         break;
4944                 default:
4945                         err = zfs_standard_error_fmt(hdl, errno, errbuf);
4946                         break;
4947                 }
4948         }
4949
4950         free(nvbuf);
4951
4952         return (err);
4953 }
4954
4955 int
4956 zfs_get_holds(zfs_handle_t *zhp, nvlist_t **nvl)
4957 {
4958         int err;
4959         char errbuf[1024];
4960
4961         err = lzc_get_holds(zhp->zfs_name, nvl);
4962
4963         if (err != 0) {
4964                 libzfs_handle_t *hdl = zhp->zfs_hdl;
4965
4966                 (void) snprintf(errbuf, sizeof (errbuf),
4967                     dgettext(TEXT_DOMAIN, "cannot get holds for '%s'"),
4968                     zhp->zfs_name);
4969                 switch (err) {
4970                 case ENOTSUP:
4971                         zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
4972                             "pool must be upgraded"));
4973                         err = zfs_error(hdl, EZFS_BADVERSION, errbuf);
4974                         break;
4975                 case EINVAL:
4976                         err = zfs_error(hdl, EZFS_BADTYPE, errbuf);
4977                         break;
4978                 case ENOENT:
4979                         err = zfs_error(hdl, EZFS_NOENT, errbuf);
4980                         break;
4981                 default:
4982                         err = zfs_standard_error_fmt(hdl, errno, errbuf);
4983                         break;
4984                 }
4985         }
4986
4987         return (err);
4988 }
4989
4990 /*
4991  * Convert the zvol's volume size to an appropriate reservation.
4992  * Note: If this routine is updated, it is necessary to update the ZFS test
4993  * suite's shell version in reservation.kshlib.
4994  */
4995 uint64_t
4996 zvol_volsize_to_reservation(uint64_t volsize, nvlist_t *props)
4997 {
4998         uint64_t numdb;
4999         uint64_t nblocks, volblocksize;
5000         int ncopies;
5001         char *strval;
5002
5003         if (nvlist_lookup_string(props,
5004             zfs_prop_to_name(ZFS_PROP_COPIES), &strval) == 0)
5005                 ncopies = atoi(strval);
5006         else
5007                 ncopies = 1;
5008         if (nvlist_lookup_uint64(props,
5009             zfs_prop_to_name(ZFS_PROP_VOLBLOCKSIZE),
5010             &volblocksize) != 0)
5011                 volblocksize = ZVOL_DEFAULT_BLOCKSIZE;
5012         nblocks = volsize/volblocksize;
5013         /* start with metadnode L0-L6 */
5014         numdb = 7;
5015         /* calculate number of indirects */
5016         while (nblocks > 1) {
5017                 nblocks += DNODES_PER_LEVEL - 1;
5018                 nblocks /= DNODES_PER_LEVEL;
5019                 numdb += nblocks;
5020         }
5021         numdb *= MIN(SPA_DVAS_PER_BP, ncopies + 1);
5022         volsize *= ncopies;
5023         /*
5024          * this is exactly DN_MAX_INDBLKSHIFT when metadata isn't
5025          * compressed, but in practice they compress down to about
5026          * 1100 bytes
5027          */
5028         numdb *= 1ULL << DN_MAX_INDBLKSHIFT;
5029         volsize += numdb;
5030         return (volsize);
5031 }
5032
5033 /*
5034  * Attach/detach the given filesystem to/from the given jail.
5035  */
5036 int
5037 zfs_jail(zfs_handle_t *zhp, int jailid, int attach)
5038 {
5039         libzfs_handle_t *hdl = zhp->zfs_hdl;
5040         zfs_cmd_t zc = { 0 };
5041         char errbuf[1024];
5042         unsigned long cmd;
5043         int ret;
5044
5045         if (attach) {
5046                 (void) snprintf(errbuf, sizeof (errbuf),
5047                     dgettext(TEXT_DOMAIN, "cannot jail '%s'"), zhp->zfs_name);
5048         } else {
5049                 (void) snprintf(errbuf, sizeof (errbuf),
5050                     dgettext(TEXT_DOMAIN, "cannot unjail '%s'"), zhp->zfs_name);
5051         }
5052
5053         switch (zhp->zfs_type) {
5054         case ZFS_TYPE_VOLUME:
5055                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
5056                     "volumes can not be jailed"));
5057                 return (zfs_error(hdl, EZFS_BADTYPE, errbuf));
5058         case ZFS_TYPE_SNAPSHOT:
5059                 zfs_error_aux(hdl, dgettext(TEXT_DOMAIN,
5060                     "snapshots can not be jailed"));
5061                 return (zfs_error(hdl, EZFS_BADTYPE, errbuf));
5062         }
5063         assert(zhp->zfs_type == ZFS_TYPE_FILESYSTEM);
5064
5065         (void) strlcpy(zc.zc_name, zhp->zfs_name, sizeof (zc.zc_name));
5066         zc.zc_objset_type = DMU_OST_ZFS;
5067         zc.zc_jailid = jailid;
5068
5069         cmd = attach ? ZFS_IOC_JAIL : ZFS_IOC_UNJAIL;
5070         if ((ret = ioctl(hdl->libzfs_fd, cmd, &zc)) != 0)
5071                 zfs_standard_error(hdl, errno, errbuf);
5072
5073         return (ret);
5074 }