module/zcommon/zfs_prop.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  * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
  23  * Use is subject to license terms.
  24  */
  25
  26 #include <sys/zio.h>
  27 #include <sys/spa.h>
  28 #include <sys/u8_textprep.h>
  29 #include <sys/zfs_acl.h>
  30 #include <sys/zfs_ioctl.h>
  31 #include <sys/zfs_znode.h>
  32
  33 #include "zfs_prop.h"
  34 #include "zfs_deleg.h"
  35
  36 #if defined(_KERNEL)
  37 #include <sys/systm.h>
  38 #else
  39 #include <stdlib.h>
  40 #include <string.h>
  41 #include <ctype.h>
  42 #endif
  43
  44 static zprop_desc_t zfs_prop_table[ZFS_NUM_PROPS];
  45
  46 /* Note this is indexed by zfs_userquota_prop_t, keep the order the same */
  47 const char *zfs_userquota_prop_prefixes[] = {
  48         "userused@",
  49         "userquota@",
  50         "groupused@",
  51         "groupquota@"
  52 };
  53
  54 zprop_desc_t *
  55 zfs_prop_get_table(void)
  56 {
  57         return (zfs_prop_table);
  58 }
  59
  60 void
  61 zfs_prop_init(void)
  62 {
  63         static zprop_index_t checksum_table[] = {
  64                 { "on",         ZIO_CHECKSUM_ON },
  65                 { "off",        ZIO_CHECKSUM_OFF },
  66                 { "fletcher2",  ZIO_CHECKSUM_FLETCHER_2 },
  67                 { "fletcher4",  ZIO_CHECKSUM_FLETCHER_4 },
  68                 { "sha256",     ZIO_CHECKSUM_SHA256 },
  69                 { NULL }
  70         };
  71
  72         static zprop_index_t compress_table[] = {
  73                 { "on",         ZIO_COMPRESS_ON },
  74                 { "off",        ZIO_COMPRESS_OFF },
  75                 { "lzjb",       ZIO_COMPRESS_LZJB },
  76                 { "gzip",       ZIO_COMPRESS_GZIP_6 },  /* gzip default */
  77                 { "gzip-1",     ZIO_COMPRESS_GZIP_1 },
  78                 { "gzip-2",     ZIO_COMPRESS_GZIP_2 },
  79                 { "gzip-3",     ZIO_COMPRESS_GZIP_3 },
  80                 { "gzip-4",     ZIO_COMPRESS_GZIP_4 },
  81                 { "gzip-5",     ZIO_COMPRESS_GZIP_5 },
  82                 { "gzip-6",     ZIO_COMPRESS_GZIP_6 },
  83                 { "gzip-7",     ZIO_COMPRESS_GZIP_7 },
  84                 { "gzip-8",     ZIO_COMPRESS_GZIP_8 },
  85                 { "gzip-9",     ZIO_COMPRESS_GZIP_9 },
  86                 { NULL }
  87         };
  88
  89         static zprop_index_t snapdir_table[] = {
  90                 { "hidden",     ZFS_SNAPDIR_HIDDEN },
  91                 { "visible",    ZFS_SNAPDIR_VISIBLE },
  92                 { NULL }
  93         };
  94
  95         static zprop_index_t acl_mode_table[] = {
  96                 { "discard",    ZFS_ACL_DISCARD },
  97                 { "groupmask",  ZFS_ACL_GROUPMASK },
  98                 { "passthrough", ZFS_ACL_PASSTHROUGH },
  99                 { NULL }
 100         };
 101
 102         static zprop_index_t acl_inherit_table[] = {
 103                 { "discard",    ZFS_ACL_DISCARD },
 104                 { "noallow",    ZFS_ACL_NOALLOW },
 105                 { "restricted", ZFS_ACL_RESTRICTED },
 106                 { "passthrough", ZFS_ACL_PASSTHROUGH },
 107                 { "secure",     ZFS_ACL_RESTRICTED }, /* bkwrd compatability */
 108                 { "passthrough-x", ZFS_ACL_PASSTHROUGH_X },
 109                 { NULL }
 110         };
 111
 112         static zprop_index_t case_table[] = {
 113                 { "sensitive",          ZFS_CASE_SENSITIVE },
 114                 { "insensitive",        ZFS_CASE_INSENSITIVE },
 115                 { "mixed",              ZFS_CASE_MIXED },
 116                 { NULL }
 117         };
 118
 119         static zprop_index_t copies_table[] = {
 120                 { "1",          1 },
 121                 { "2",          2 },
 122                 { "3",          3 },
 123                 { NULL }
 124         };
 125
 126         /*
 127          * Use the unique flags we have to send to u8_strcmp() and/or
 128          * u8_textprep() to represent the various normalization property
 129          * values.
 130          */
 131         static zprop_index_t normalize_table[] = {
 132                 { "none",       0 },
 133                 { "formD",      U8_TEXTPREP_NFD },
 134                 { "formKC",     U8_TEXTPREP_NFKC },
 135                 { "formC",      U8_TEXTPREP_NFC },
 136                 { "formKD",     U8_TEXTPREP_NFKD },
 137                 { NULL }
 138         };
 139
 140         static zprop_index_t version_table[] = {
 141                 { "1",          1 },
 142                 { "2",          2 },
 143                 { "3",          3 },
 144                 { "4",          4 },
 145                 { "current",    ZPL_VERSION },
 146                 { NULL }
 147         };
 148
 149         static zprop_index_t boolean_table[] = {
 150                 { "off",        0 },
 151                 { "on",         1 },
 152                 { NULL }
 153         };
 154
 155         static zprop_index_t canmount_table[] = {
 156                 { "off",        ZFS_CANMOUNT_OFF },
 157                 { "on",         ZFS_CANMOUNT_ON },
 158                 { "noauto",     ZFS_CANMOUNT_NOAUTO },
 159                 { NULL }
 160         };
 161
 162         static zprop_index_t cache_table[] = {
 163                 { "none",       ZFS_CACHE_NONE },
 164                 { "metadata",   ZFS_CACHE_METADATA },
 165                 { "all",        ZFS_CACHE_ALL },
 166                 { NULL }
 167         };
 168
 169         /* inherit index properties */
 170         register_index(ZFS_PROP_CHECKSUM, "checksum", ZIO_CHECKSUM_DEFAULT,
 171             PROP_INHERIT, ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME,
 172             "on | off | fletcher2 | fletcher4 | sha256", "CHECKSUM",
 173             checksum_table);
 174         register_index(ZFS_PROP_COMPRESSION, "compression",
 175             ZIO_COMPRESS_DEFAULT, PROP_INHERIT,
 176             ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME,
 177             "on | off | lzjb | gzip | gzip-[1-9]", "COMPRESS", compress_table);
 178         register_index(ZFS_PROP_SNAPDIR, "snapdir", ZFS_SNAPDIR_HIDDEN,
 179             PROP_INHERIT, ZFS_TYPE_FILESYSTEM,
 180             "hidden | visible", "SNAPDIR", snapdir_table);
 181         register_index(ZFS_PROP_ACLMODE, "aclmode", ZFS_ACL_GROUPMASK,
 182             PROP_INHERIT, ZFS_TYPE_FILESYSTEM,
 183             "discard | groupmask | passthrough", "ACLMODE", acl_mode_table);
 184         register_index(ZFS_PROP_ACLINHERIT, "aclinherit", ZFS_ACL_RESTRICTED,
 185             PROP_INHERIT, ZFS_TYPE_FILESYSTEM,
 186             "discard | noallow | restricted | passthrough | passthrough-x",
 187             "ACLINHERIT", acl_inherit_table);
 188         register_index(ZFS_PROP_COPIES, "copies", 1,
 189             PROP_INHERIT, ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME,
 190             "1 | 2 | 3", "COPIES", copies_table);
 191         register_index(ZFS_PROP_PRIMARYCACHE, "primarycache",
 192             ZFS_CACHE_ALL, PROP_INHERIT,
 193             ZFS_TYPE_FILESYSTEM | ZFS_TYPE_SNAPSHOT | ZFS_TYPE_VOLUME,
 194             "all | none | metadata", "PRIMARYCACHE", cache_table);
 195         register_index(ZFS_PROP_SECONDARYCACHE, "secondarycache",
 196             ZFS_CACHE_ALL, PROP_INHERIT,
 197             ZFS_TYPE_FILESYSTEM | ZFS_TYPE_SNAPSHOT | ZFS_TYPE_VOLUME,
 198             "all | none | metadata", "SECONDARYCACHE", cache_table);
 199
 200         /* inherit index (boolean) properties */
 201         register_index(ZFS_PROP_ATIME, "atime", 1, PROP_INHERIT,
 202             ZFS_TYPE_FILESYSTEM, "on | off", "ATIME", boolean_table);
 203         register_index(ZFS_PROP_DEVICES, "devices", 1, PROP_INHERIT,
 204             ZFS_TYPE_FILESYSTEM | ZFS_TYPE_SNAPSHOT, "on | off", "DEVICES",
 205             boolean_table);
 206         register_index(ZFS_PROP_EXEC, "exec", 1, PROP_INHERIT,
 207             ZFS_TYPE_FILESYSTEM | ZFS_TYPE_SNAPSHOT, "on | off", "EXEC",
 208             boolean_table);
 209         register_index(ZFS_PROP_SETUID, "setuid", 1, PROP_INHERIT,
 210             ZFS_TYPE_FILESYSTEM | ZFS_TYPE_SNAPSHOT, "on | off", "SETUID",
 211             boolean_table);
 212         register_index(ZFS_PROP_READONLY, "readonly", 0, PROP_INHERIT,
 213             ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME, "on | off", "RDONLY",
 214             boolean_table);
 215         register_index(ZFS_PROP_ZONED, "zoned", 0, PROP_INHERIT,
 216             ZFS_TYPE_FILESYSTEM, "on | off", "ZONED", boolean_table);
 217         register_index(ZFS_PROP_XATTR, "xattr", 1, PROP_INHERIT,
 218             ZFS_TYPE_FILESYSTEM | ZFS_TYPE_SNAPSHOT, "on | off", "XATTR",
 219             boolean_table);
 220         register_index(ZFS_PROP_VSCAN, "vscan", 0, PROP_INHERIT,
 221             ZFS_TYPE_FILESYSTEM, "on | off", "VSCAN",
 222             boolean_table);
 223         register_index(ZFS_PROP_NBMAND, "nbmand", 0, PROP_INHERIT,
 224             ZFS_TYPE_FILESYSTEM | ZFS_TYPE_SNAPSHOT, "on | off", "NBMAND",
 225             boolean_table);
 226
 227         /* default index properties */
 228         register_index(ZFS_PROP_VERSION, "version", 0, PROP_DEFAULT,
 229             ZFS_TYPE_FILESYSTEM | ZFS_TYPE_SNAPSHOT,
 230             "1 | 2 | 3 | 4 | current", "VERSION", version_table);
 231         register_index(ZFS_PROP_CANMOUNT, "canmount", ZFS_CANMOUNT_ON,
 232             PROP_DEFAULT, ZFS_TYPE_FILESYSTEM, "on | off | noauto",
 233             "CANMOUNT", canmount_table);
 234
 235         /* readonly index (boolean) properties */
 236         register_index(ZFS_PROP_MOUNTED, "mounted", 0, PROP_READONLY,
 237             ZFS_TYPE_FILESYSTEM, "yes | no", "MOUNTED", boolean_table);
 238         register_index(ZFS_PROP_DEFER_DESTROY, "defer_destroy", 0,
 239             PROP_READONLY, ZFS_TYPE_SNAPSHOT, "yes | no", "DEFER_DESTROY",
 240             boolean_table);
 241
 242         /* set once index properties */
 243         register_index(ZFS_PROP_NORMALIZE, "normalization", 0,
 244             PROP_ONETIME, ZFS_TYPE_FILESYSTEM | ZFS_TYPE_SNAPSHOT,
 245             "none | formC | formD | formKC | formKD", "NORMALIZATION",
 246             normalize_table);
 247         register_index(ZFS_PROP_CASE, "casesensitivity", ZFS_CASE_SENSITIVE,
 248             PROP_ONETIME, ZFS_TYPE_FILESYSTEM | ZFS_TYPE_SNAPSHOT,
 249             "sensitive | insensitive | mixed", "CASE", case_table);
 250
 251         /* set once index (boolean) properties */
 252         register_index(ZFS_PROP_UTF8ONLY, "utf8only", 0, PROP_ONETIME,
 253             ZFS_TYPE_FILESYSTEM | ZFS_TYPE_SNAPSHOT,
 254             "on | off", "UTF8ONLY", boolean_table);
 255
 256         /* string properties */
 257         register_string(ZFS_PROP_ORIGIN, "origin", NULL, PROP_READONLY,
 258             ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME, "<snapshot>", "ORIGIN");
 259         register_string(ZFS_PROP_MOUNTPOINT, "mountpoint", "/", PROP_INHERIT,
 260             ZFS_TYPE_FILESYSTEM, "<path> | legacy | none", "MOUNTPOINT");
 261         register_string(ZFS_PROP_SHARENFS, "sharenfs", "off", PROP_INHERIT,
 262             ZFS_TYPE_FILESYSTEM, "on | off | share(1M) options", "SHARENFS");
 263         register_string(ZFS_PROP_SHAREISCSI, "shareiscsi", "off", PROP_INHERIT,
 264             ZFS_TYPE_DATASET, "on | off | type=<type>", "SHAREISCSI");
 265         register_string(ZFS_PROP_TYPE, "type", NULL, PROP_READONLY,
 266             ZFS_TYPE_DATASET, "filesystem | volume | snapshot", "TYPE");
 267         register_string(ZFS_PROP_SHARESMB, "sharesmb", "off", PROP_INHERIT,
 268             ZFS_TYPE_FILESYSTEM, "on | off | sharemgr(1M) options", "SHARESMB");
 269
 270         /* readonly number properties */
 271         register_number(ZFS_PROP_USED, "used", 0, PROP_READONLY,
 272             ZFS_TYPE_DATASET, "<size>", "USED");
 273         register_number(ZFS_PROP_AVAILABLE, "available", 0, PROP_READONLY,
 274             ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME, "<size>", "AVAIL");
 275         register_number(ZFS_PROP_REFERENCED, "referenced", 0, PROP_READONLY,
 276             ZFS_TYPE_DATASET, "<size>", "REFER");
 277         register_number(ZFS_PROP_COMPRESSRATIO, "compressratio", 0,
 278             PROP_READONLY, ZFS_TYPE_DATASET,
 279             "<1.00x or higher if compressed>", "RATIO");
 280         register_number(ZFS_PROP_VOLBLOCKSIZE, "volblocksize", 8192,
 281             PROP_ONETIME,
 282             ZFS_TYPE_VOLUME, "512 to 128k, power of 2", "VOLBLOCK");
 283         register_number(ZFS_PROP_USEDSNAP, "usedbysnapshots", 0, PROP_READONLY,
 284             ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME, "<size>", "USEDSNAP");
 285         register_number(ZFS_PROP_USEDDS, "usedbydataset", 0, PROP_READONLY,
 286             ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME, "<size>", "USEDDS");
 287         register_number(ZFS_PROP_USEDCHILD, "usedbychildren", 0, PROP_READONLY,
 288             ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME, "<size>", "USEDCHILD");
 289         register_number(ZFS_PROP_USEDREFRESERV, "usedbyrefreservation", 0,
 290             PROP_READONLY,
 291             ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME, "<size>", "USEDREFRESERV");
 292         register_number(ZFS_PROP_USERREFS, "userrefs", 0, PROP_READONLY,
 293             ZFS_TYPE_SNAPSHOT, "<count>", "USERREFS");
 294
 295         /* default number properties */
 296         register_number(ZFS_PROP_QUOTA, "quota", 0, PROP_DEFAULT,
 297             ZFS_TYPE_FILESYSTEM, "<size> | none", "QUOTA");
 298         register_number(ZFS_PROP_RESERVATION, "reservation", 0, PROP_DEFAULT,
 299             ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME, "<size> | none", "RESERV");
 300         register_number(ZFS_PROP_VOLSIZE, "volsize", 0, PROP_DEFAULT,
 301             ZFS_TYPE_VOLUME, "<size>", "VOLSIZE");
 302         register_number(ZFS_PROP_REFQUOTA, "refquota", 0, PROP_DEFAULT,
 303             ZFS_TYPE_FILESYSTEM, "<size> | none", "REFQUOTA");
 304         register_number(ZFS_PROP_REFRESERVATION, "refreservation", 0,
 305             PROP_DEFAULT, ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME,
 306             "<size> | none", "REFRESERV");
 307
 308         /* inherit number properties */
 309         register_number(ZFS_PROP_RECORDSIZE, "recordsize", SPA_MAXBLOCKSIZE,
 310             PROP_INHERIT,
 311             ZFS_TYPE_FILESYSTEM, "512 to 128k, power of 2", "RECSIZE");
 312
 313         /* hidden properties */
 314         register_hidden(ZFS_PROP_CREATETXG, "createtxg", PROP_TYPE_NUMBER,
 315             PROP_READONLY, ZFS_TYPE_DATASET, NULL);
 316         register_hidden(ZFS_PROP_NUMCLONES, "numclones", PROP_TYPE_NUMBER,
 317             PROP_READONLY, ZFS_TYPE_SNAPSHOT, NULL);
 318         register_hidden(ZFS_PROP_NAME, "name", PROP_TYPE_STRING,
 319             PROP_READONLY, ZFS_TYPE_DATASET, "NAME");
 320         register_hidden(ZFS_PROP_ISCSIOPTIONS, "iscsioptions", PROP_TYPE_STRING,
 321             PROP_INHERIT, ZFS_TYPE_VOLUME, "ISCSIOPTIONS");
 322         register_hidden(ZFS_PROP_STMF_SHAREINFO, "stmf_sbd_lu",
 323             PROP_TYPE_STRING, PROP_INHERIT, ZFS_TYPE_VOLUME,
 324             "STMF_SBD_LU");
 325         register_hidden(ZFS_PROP_GUID, "guid", PROP_TYPE_NUMBER, PROP_READONLY,
 326             ZFS_TYPE_DATASET, "GUID");
 327         register_hidden(ZFS_PROP_USERACCOUNTING, "useraccounting",
 328             PROP_TYPE_NUMBER, PROP_READONLY, ZFS_TYPE_DATASET, NULL);
 329
 330         /* oddball properties */
 331         register_impl(ZFS_PROP_CREATION, "creation", PROP_TYPE_NUMBER, 0, NULL,
 332             PROP_READONLY, ZFS_TYPE_DATASET,
 333             "<date>", "CREATION", B_FALSE, B_TRUE, NULL);
 334 }
 335
 336 boolean_t
 337 zfs_prop_delegatable(zfs_prop_t prop)
 338 {
 339         zprop_desc_t *pd = &zfs_prop_table[prop];
 340         return (pd->pd_attr != PROP_READONLY);
 341 }
 342
 343 /*
 344  * Given a zfs dataset property name, returns the corresponding property ID.
 345  */
 346 zfs_prop_t
 347 zfs_name_to_prop(const char *propname)
 348 {
 349         return (zprop_name_to_prop(propname, ZFS_TYPE_DATASET));
 350 }
 351
 352 /*
 353  * For user property names, we allow all lowercase alphanumeric characters, plus
 354  * a few useful punctuation characters.
 355  */
 356 static int
 357 valid_char(char c)
 358 {
 359         return ((c >= 'a' && c <= 'z') ||
 360             (c >= '0' && c <= '9') ||
 361             c == '-' || c == '_' || c == '.' || c == ':');
 362 }
 363
 364 /*
 365  * Returns true if this is a valid user-defined property (one with a ':').
 366  */
 367 boolean_t
 368 zfs_prop_user(const char *name)
 369 {
 370         int i;
 371         char c;
 372         boolean_t foundsep = B_FALSE;
 373
 374         for (i = 0; i < strlen(name); i++) {
 375                 c = name[i];
 376                 if (!valid_char(c))
 377                         return (B_FALSE);
 378                 if (c == ':')
 379                         foundsep = B_TRUE;
 380         }
 381
 382         if (!foundsep)
 383                 return (B_FALSE);
 384
 385         return (B_TRUE);
 386 }
 387
 388 /*
 389  * Returns true if this is a valid userspace-type property (one with a '@').
 390  * Note that after the @, any character is valid (eg, another @, for SID
 391  * user@domain).
 392  */
 393 boolean_t
 394 zfs_prop_userquota(const char *name)
 395 {
 396         zfs_userquota_prop_t prop;
 397
 398         for (prop = 0; prop < ZFS_NUM_USERQUOTA_PROPS; prop++) {
 399                 if (strncmp(name, zfs_userquota_prop_prefixes[prop],
 400                     strlen(zfs_userquota_prop_prefixes[prop])) == 0) {
 401                         return (B_TRUE);
 402                 }
 403         }
 404
 405         return (B_FALSE);
 406 }
 407
 408 /*
 409  * Tables of index types, plus functions to convert between the user view
 410  * (strings) and internal representation (uint64_t).
 411  */
 412 int
 413 zfs_prop_string_to_index(zfs_prop_t prop, const char *string, uint64_t *index)
 414 {
 415         return (zprop_string_to_index(prop, string, index, ZFS_TYPE_DATASET));
 416 }
 417
 418 int
 419 zfs_prop_index_to_string(zfs_prop_t prop, uint64_t index, const char **string)
 420 {
 421         return (zprop_index_to_string(prop, index, string, ZFS_TYPE_DATASET));
 422 }
 423
 424 /*
 425  * Returns TRUE if the property applies to any of the given dataset types.
 426  */
 427 boolean_t
 428 zfs_prop_valid_for_type(int prop, zfs_type_t types)
 429 {
 430         return (zprop_valid_for_type(prop, types));
 431 }
 432
 433 zprop_type_t
 434 zfs_prop_get_type(zfs_prop_t prop)
 435 {
 436         return (zfs_prop_table[prop].pd_proptype);
 437 }
 438
 439 /*
 440  * Returns TRUE if the property is readonly.
 441  */
 442 boolean_t
 443 zfs_prop_readonly(zfs_prop_t prop)
 444 {
 445         return (zfs_prop_table[prop].pd_attr == PROP_READONLY ||
 446             zfs_prop_table[prop].pd_attr == PROP_ONETIME);
 447 }
 448
 449 /*
 450  * Returns TRUE if the property is only allowed to be set once.
 451  */
 452 boolean_t
 453 zfs_prop_setonce(zfs_prop_t prop)
 454 {
 455         return (zfs_prop_table[prop].pd_attr == PROP_ONETIME);
 456 }
 457
 458 const char *
 459 zfs_prop_default_string(zfs_prop_t prop)
 460 {
 461         return (zfs_prop_table[prop].pd_strdefault);
 462 }
 463
 464 uint64_t
 465 zfs_prop_default_numeric(zfs_prop_t prop)
 466 {
 467         return (zfs_prop_table[prop].pd_numdefault);
 468 }
 469
 470 /*
 471  * Given a dataset property ID, returns the corresponding name.
 472  * Assuming the zfs dataset property ID is valid.
 473  */
 474 const char *
 475 zfs_prop_to_name(zfs_prop_t prop)
 476 {
 477         return (zfs_prop_table[prop].pd_name);
 478 }
 479
 480 /*
 481  * Returns TRUE if the property is inheritable.
 482  */
 483 boolean_t
 484 zfs_prop_inheritable(zfs_prop_t prop)
 485 {
 486         return (zfs_prop_table[prop].pd_attr == PROP_INHERIT ||
 487             zfs_prop_table[prop].pd_attr == PROP_ONETIME);
 488 }
 489
 490 #ifndef _KERNEL
 491
 492 /*
 493  * Returns a string describing the set of acceptable values for the given
 494  * zfs property, or NULL if it cannot be set.
 495  */
 496 const char *
 497 zfs_prop_values(zfs_prop_t prop)
 498 {
 499         return (zfs_prop_table[prop].pd_values);
 500 }
 501
 502 /*
 503  * Returns TRUE if this property is a string type.  Note that index types
 504  * (compression, checksum) are treated as strings in userland, even though they
 505  * are stored numerically on disk.
 506  */
 507 int
 508 zfs_prop_is_string(zfs_prop_t prop)
 509 {
 510         return (zfs_prop_table[prop].pd_proptype == PROP_TYPE_STRING ||
 511             zfs_prop_table[prop].pd_proptype == PROP_TYPE_INDEX);
 512 }
 513
 514 /*
 515  * Returns the column header for the given property.  Used only in
 516  * 'zfs list -o', but centralized here with the other property information.
 517  */
 518 const char *
 519 zfs_prop_column_name(zfs_prop_t prop)
 520 {
 521         return (zfs_prop_table[prop].pd_colname);
 522 }
 523
 524 /*
 525  * Returns whether the given property should be displayed right-justified for
 526  * 'zfs list'.
 527  */
 528 boolean_t
 529 zfs_prop_align_right(zfs_prop_t prop)
 530 {
 531         return (zfs_prop_table[prop].pd_rightalign);
 532 }
 533
 534 #endif