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 (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
  23  * Copyright (c) 2011 by Delphix. All rights reserved.
  24  */
  25
  26 /* Portions Copyright 2010 Robert Milkowski */
  27
  28 #include <sys/zio.h>
  29 #include <sys/spa.h>
  30 #include <sys/u8_textprep.h>
  31 #include <sys/zfs_acl.h>
  32 #include <sys/zfs_ioctl.h>
  33 #include <sys/zfs_znode.h>
  34
  35 #include "zfs_prop.h"
  36 #include "zfs_deleg.h"
  37
  38 #if defined(_KERNEL)
  39 #include <sys/systm.h>
  40 #else
  41 #include <stdlib.h>
  42 #include <string.h>
  43 #include <ctype.h>
  44 #endif
  45
  46 static zprop_desc_t zfs_prop_table[ZFS_NUM_PROPS];
  47
  48 /* Note this is indexed by zfs_userquota_prop_t, keep the order the same */
  49 const char *zfs_userquota_prop_prefixes[] = {
  50         "userused@",
  51         "userquota@",
  52         "groupused@",
  53         "groupquota@"
  54 };
  55
  56 zprop_desc_t *
  57 zfs_prop_get_table(void)
  58 {
  59         return (zfs_prop_table);
  60 }
  61
  62 void
  63 zfs_prop_init(void)
  64 {
  65         static zprop_index_t checksum_table[] = {
  66                 { "on",         ZIO_CHECKSUM_ON },
  67                 { "off",        ZIO_CHECKSUM_OFF },
  68                 { "fletcher2",  ZIO_CHECKSUM_FLETCHER_2 },
  69                 { "fletcher4",  ZIO_CHECKSUM_FLETCHER_4 },
  70                 { "sha256",     ZIO_CHECKSUM_SHA256 },
  71                 { NULL }
  72         };
  73
  74         static zprop_index_t dedup_table[] = {
  75                 { "on",         ZIO_CHECKSUM_ON },
  76                 { "off",        ZIO_CHECKSUM_OFF },
  77                 { "verify",     ZIO_CHECKSUM_ON | ZIO_CHECKSUM_VERIFY },
  78                 { "sha256",     ZIO_CHECKSUM_SHA256 },
  79                 { "sha256,verify",
  80                                 ZIO_CHECKSUM_SHA256 | ZIO_CHECKSUM_VERIFY },
  81                 { NULL }
  82         };
  83
  84         static zprop_index_t compress_table[] = {
  85                 { "on",         ZIO_COMPRESS_ON },
  86                 { "off",        ZIO_COMPRESS_OFF },
  87                 { "lzjb",       ZIO_COMPRESS_LZJB },
  88                 { "gzip",       ZIO_COMPRESS_GZIP_6 },  /* gzip default */
  89                 { "gzip-1",     ZIO_COMPRESS_GZIP_1 },
  90                 { "gzip-2",     ZIO_COMPRESS_GZIP_2 },
  91                 { "gzip-3",     ZIO_COMPRESS_GZIP_3 },
  92                 { "gzip-4",     ZIO_COMPRESS_GZIP_4 },
  93                 { "gzip-5",     ZIO_COMPRESS_GZIP_5 },
  94                 { "gzip-6",     ZIO_COMPRESS_GZIP_6 },
  95                 { "gzip-7",     ZIO_COMPRESS_GZIP_7 },
  96                 { "gzip-8",     ZIO_COMPRESS_GZIP_8 },
  97                 { "gzip-9",     ZIO_COMPRESS_GZIP_9 },
  98                 { "zle",        ZIO_COMPRESS_ZLE },
  99                 { NULL }
 100         };
 101
 102         static zprop_index_t snapdir_table[] = {
 103                 { "hidden",     ZFS_SNAPDIR_HIDDEN },
 104                 { "visible",    ZFS_SNAPDIR_VISIBLE },
 105                 { NULL }
 106         };
 107
 108         static zprop_index_t acl_inherit_table[] = {
 109                 { "discard",    ZFS_ACL_DISCARD },
 110                 { "noallow",    ZFS_ACL_NOALLOW },
 111                 { "restricted", ZFS_ACL_RESTRICTED },
 112                 { "passthrough", ZFS_ACL_PASSTHROUGH },
 113                 { "secure",     ZFS_ACL_RESTRICTED }, /* bkwrd compatability */
 114                 { "passthrough-x", ZFS_ACL_PASSTHROUGH_X },
 115                 { NULL }
 116         };
 117
 118         static zprop_index_t case_table[] = {
 119                 { "sensitive",          ZFS_CASE_SENSITIVE },
 120                 { "insensitive",        ZFS_CASE_INSENSITIVE },
 121                 { "mixed",              ZFS_CASE_MIXED },
 122                 { NULL }
 123         };
 124
 125         static zprop_index_t copies_table[] = {
 126                 { "1",          1 },
 127                 { "2",          2 },
 128                 { "3",          3 },
 129                 { NULL }
 130         };
 131
 132         /*
 133          * Use the unique flags we have to send to u8_strcmp() and/or
 134          * u8_textprep() to represent the various normalization property
 135          * values.
 136          */
 137         static zprop_index_t normalize_table[] = {
 138                 { "none",       0 },
 139                 { "formD",      U8_TEXTPREP_NFD },
 140                 { "formKC",     U8_TEXTPREP_NFKC },
 141                 { "formC",      U8_TEXTPREP_NFC },
 142                 { "formKD",     U8_TEXTPREP_NFKD },
 143                 { NULL }
 144         };
 145
 146         static zprop_index_t version_table[] = {
 147                 { "1",          1 },
 148                 { "2",          2 },
 149                 { "3",          3 },
 150                 { "4",          4 },
 151                 { "5",          5 },
 152                 { "current",    ZPL_VERSION },
 153                 { NULL }
 154         };
 155
 156         static zprop_index_t boolean_table[] = {
 157                 { "off",        0 },
 158                 { "on",         1 },
 159                 { NULL }
 160         };
 161
 162         static zprop_index_t logbias_table[] = {
 163                 { "latency",    ZFS_LOGBIAS_LATENCY },
 164                 { "throughput", ZFS_LOGBIAS_THROUGHPUT },
 165                 { NULL }
 166         };
 167
 168         static zprop_index_t canmount_table[] = {
 169                 { "off",        ZFS_CANMOUNT_OFF },
 170                 { "on",         ZFS_CANMOUNT_ON },
 171                 { "noauto",     ZFS_CANMOUNT_NOAUTO },
 172                 { NULL }
 173         };
 174
 175         static zprop_index_t cache_table[] = {
 176                 { "none",       ZFS_CACHE_NONE },
 177                 { "metadata",   ZFS_CACHE_METADATA },
 178                 { "all",        ZFS_CACHE_ALL },
 179                 { NULL }
 180         };
 181
 182         static zprop_index_t sync_table[] = {
 183                 { "standard",   ZFS_SYNC_STANDARD },
 184                 { "always",     ZFS_SYNC_ALWAYS },
 185                 { "disabled",   ZFS_SYNC_DISABLED },
 186                 { NULL }
 187         };
 188
 189         static zprop_index_t xattr_table[] = {
 190                 { "off",        ZFS_XATTR_OFF },
 191                 { "on",         ZFS_XATTR_DIR },
 192                 { "sa",         ZFS_XATTR_SA },
 193                 { "dir",        ZFS_XATTR_DIR },
 194                 { NULL }
 195         };
 196
 197         /* inherit index properties */
 198         zprop_register_index(ZFS_PROP_SYNC, "sync", ZFS_SYNC_STANDARD,
 199             PROP_INHERIT, ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME,
 200             "standard | always | disabled", "SYNC",
 201             sync_table);
 202         zprop_register_index(ZFS_PROP_CHECKSUM, "checksum",
 203             ZIO_CHECKSUM_DEFAULT, PROP_INHERIT, ZFS_TYPE_FILESYSTEM |
 204             ZFS_TYPE_VOLUME,
 205             "on | off | fletcher2 | fletcher4 | sha256", "CHECKSUM",
 206             checksum_table);
 207         zprop_register_index(ZFS_PROP_DEDUP, "dedup", ZIO_CHECKSUM_OFF,
 208             PROP_INHERIT, ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME,
 209             "on | off | verify | sha256[,verify]", "DEDUP",
 210             dedup_table);
 211         zprop_register_index(ZFS_PROP_COMPRESSION, "compression",
 212             ZIO_COMPRESS_DEFAULT, PROP_INHERIT,
 213             ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME,
 214             "on | off | lzjb | gzip | gzip-[1-9] | zle", "COMPRESS",
 215             compress_table);
 216         zprop_register_index(ZFS_PROP_SNAPDIR, "snapdir", ZFS_SNAPDIR_HIDDEN,
 217             PROP_INHERIT, ZFS_TYPE_FILESYSTEM,
 218             "hidden | visible", "SNAPDIR", snapdir_table);
 219         zprop_register_index(ZFS_PROP_ACLINHERIT, "aclinherit",
 220             ZFS_ACL_RESTRICTED, PROP_INHERIT, ZFS_TYPE_FILESYSTEM,
 221             "discard | noallow | restricted | passthrough | passthrough-x",
 222             "ACLINHERIT", acl_inherit_table);
 223         zprop_register_index(ZFS_PROP_COPIES, "copies", 1, PROP_INHERIT,
 224             ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME,
 225             "1 | 2 | 3", "COPIES", copies_table);
 226         zprop_register_index(ZFS_PROP_PRIMARYCACHE, "primarycache",
 227             ZFS_CACHE_ALL, PROP_INHERIT,
 228             ZFS_TYPE_FILESYSTEM | ZFS_TYPE_SNAPSHOT | ZFS_TYPE_VOLUME,
 229             "all | none | metadata", "PRIMARYCACHE", cache_table);
 230         zprop_register_index(ZFS_PROP_SECONDARYCACHE, "secondarycache",
 231             ZFS_CACHE_ALL, PROP_INHERIT,
 232             ZFS_TYPE_FILESYSTEM | ZFS_TYPE_SNAPSHOT | ZFS_TYPE_VOLUME,
 233             "all | none | metadata", "SECONDARYCACHE", cache_table);
 234         zprop_register_index(ZFS_PROP_LOGBIAS, "logbias", ZFS_LOGBIAS_LATENCY,
 235             PROP_INHERIT, ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME,
 236             "latency | throughput", "LOGBIAS", logbias_table);
 237         zprop_register_index(ZFS_PROP_XATTR, "xattr", ZFS_XATTR_DIR,
 238             PROP_INHERIT, ZFS_TYPE_FILESYSTEM | ZFS_TYPE_SNAPSHOT,
 239             "on | off | dir | sa", "XATTR", xattr_table);
 240
 241         /* inherit index (boolean) properties */
 242         zprop_register_index(ZFS_PROP_ATIME, "atime", 1, PROP_INHERIT,
 243             ZFS_TYPE_FILESYSTEM, "on | off", "ATIME", boolean_table);
 244         zprop_register_index(ZFS_PROP_DEVICES, "devices", 1, PROP_INHERIT,
 245             ZFS_TYPE_FILESYSTEM | ZFS_TYPE_SNAPSHOT, "on | off", "DEVICES",
 246             boolean_table);
 247         zprop_register_index(ZFS_PROP_EXEC, "exec", 1, PROP_INHERIT,
 248             ZFS_TYPE_FILESYSTEM | ZFS_TYPE_SNAPSHOT, "on | off", "EXEC",
 249             boolean_table);
 250         zprop_register_index(ZFS_PROP_SETUID, "setuid", 1, PROP_INHERIT,
 251             ZFS_TYPE_FILESYSTEM | ZFS_TYPE_SNAPSHOT, "on | off", "SETUID",
 252             boolean_table);
 253         zprop_register_index(ZFS_PROP_READONLY, "readonly", 0, PROP_INHERIT,
 254             ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME, "on | off", "RDONLY",
 255             boolean_table);
 256         zprop_register_index(ZFS_PROP_ZONED, "zoned", 0, PROP_INHERIT,
 257             ZFS_TYPE_FILESYSTEM, "on | off", "ZONED", boolean_table);
 258         zprop_register_index(ZFS_PROP_VSCAN, "vscan", 0, PROP_INHERIT,
 259             ZFS_TYPE_FILESYSTEM, "on | off", "VSCAN", boolean_table);
 260         zprop_register_index(ZFS_PROP_NBMAND, "nbmand", 0, PROP_INHERIT,
 261             ZFS_TYPE_FILESYSTEM | ZFS_TYPE_SNAPSHOT, "on | off", "NBMAND",
 262             boolean_table);
 263
 264         /* default index properties */
 265         zprop_register_index(ZFS_PROP_VERSION, "version", 0, PROP_DEFAULT,
 266             ZFS_TYPE_FILESYSTEM | ZFS_TYPE_SNAPSHOT,
 267             "1 | 2 | 3 | 4 | 5 | current", "VERSION", version_table);
 268         zprop_register_index(ZFS_PROP_CANMOUNT, "canmount", ZFS_CANMOUNT_ON,
 269             PROP_DEFAULT, ZFS_TYPE_FILESYSTEM, "on | off | noauto",
 270             "CANMOUNT", canmount_table);
 271
 272         /* readonly index (boolean) properties */
 273         zprop_register_index(ZFS_PROP_MOUNTED, "mounted", 0, PROP_READONLY,
 274             ZFS_TYPE_FILESYSTEM, "yes | no", "MOUNTED", boolean_table);
 275         zprop_register_index(ZFS_PROP_DEFER_DESTROY, "defer_destroy", 0,
 276             PROP_READONLY, ZFS_TYPE_SNAPSHOT, "yes | no", "DEFER_DESTROY",
 277             boolean_table);
 278
 279         /* set once index properties */
 280         zprop_register_index(ZFS_PROP_NORMALIZE, "normalization", 0,
 281             PROP_ONETIME, ZFS_TYPE_FILESYSTEM | ZFS_TYPE_SNAPSHOT,
 282             "none | formC | formD | formKC | formKD", "NORMALIZATION",
 283             normalize_table);
 284         zprop_register_index(ZFS_PROP_CASE, "casesensitivity",
 285             ZFS_CASE_SENSITIVE, PROP_ONETIME, ZFS_TYPE_FILESYSTEM |
 286             ZFS_TYPE_SNAPSHOT,
 287             "sensitive | insensitive | mixed", "CASE", case_table);
 288
 289         /* set once index (boolean) properties */
 290         zprop_register_index(ZFS_PROP_UTF8ONLY, "utf8only", 0, PROP_ONETIME,
 291             ZFS_TYPE_FILESYSTEM | ZFS_TYPE_SNAPSHOT,
 292             "on | off", "UTF8ONLY", boolean_table);
 293
 294         /* string properties */
 295         zprop_register_string(ZFS_PROP_ORIGIN, "origin", NULL, PROP_READONLY,
 296             ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME, "<snapshot>", "ORIGIN");
 297         zprop_register_string(ZFS_PROP_CLONES, "clones", NULL, PROP_READONLY,
 298             ZFS_TYPE_SNAPSHOT, "<dataset>[,...]", "CLONES");
 299         zprop_register_string(ZFS_PROP_MOUNTPOINT, "mountpoint", "/",
 300             PROP_INHERIT, ZFS_TYPE_FILESYSTEM, "<path> | legacy | none",
 301             "MOUNTPOINT");
 302         zprop_register_string(ZFS_PROP_SHARENFS, "sharenfs", "off",
 303             PROP_INHERIT, ZFS_TYPE_FILESYSTEM, "on | off | share(1M) options",
 304             "SHARENFS");
 305         zprop_register_string(ZFS_PROP_TYPE, "type", NULL, PROP_READONLY,
 306             ZFS_TYPE_DATASET, "filesystem | volume | snapshot", "TYPE");
 307         zprop_register_string(ZFS_PROP_SHARESMB, "sharesmb", "off",
 308             PROP_INHERIT, ZFS_TYPE_FILESYSTEM,
 309             "on | off | sharemgr(1M) options", "SHARESMB");
 310         zprop_register_string(ZFS_PROP_MLSLABEL, "mlslabel",
 311             ZFS_MLSLABEL_DEFAULT, PROP_INHERIT, ZFS_TYPE_DATASET,
 312             "<sensitivity label>", "MLSLABEL");
 313
 314         /* readonly number properties */
 315         zprop_register_number(ZFS_PROP_USED, "used", 0, PROP_READONLY,
 316             ZFS_TYPE_DATASET, "<size>", "USED");
 317         zprop_register_number(ZFS_PROP_AVAILABLE, "available", 0, PROP_READONLY,
 318             ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME, "<size>", "AVAIL");
 319         zprop_register_number(ZFS_PROP_REFERENCED, "referenced", 0,
 320             PROP_READONLY, ZFS_TYPE_DATASET, "<size>", "REFER");
 321         zprop_register_number(ZFS_PROP_COMPRESSRATIO, "compressratio", 0,
 322             PROP_READONLY, ZFS_TYPE_DATASET,
 323             "<1.00x or higher if compressed>", "RATIO");
 324         zprop_register_number(ZFS_PROP_REFRATIO, "refcompressratio", 0,
 325             PROP_READONLY, ZFS_TYPE_DATASET,
 326             "<1.00x or higher if compressed>", "REFRATIO");
 327         zprop_register_number(ZFS_PROP_VOLBLOCKSIZE, "volblocksize",
 328             ZVOL_DEFAULT_BLOCKSIZE, PROP_ONETIME,
 329             ZFS_TYPE_VOLUME, "512 to 128k, power of 2", "VOLBLOCK");
 330         zprop_register_number(ZFS_PROP_USEDSNAP, "usedbysnapshots", 0,
 331             PROP_READONLY, ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME, "<size>",
 332             "USEDSNAP");
 333         zprop_register_number(ZFS_PROP_USEDDS, "usedbydataset", 0,
 334             PROP_READONLY, ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME, "<size>",
 335             "USEDDS");
 336         zprop_register_number(ZFS_PROP_USEDCHILD, "usedbychildren", 0,
 337             PROP_READONLY, ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME, "<size>",
 338             "USEDCHILD");
 339         zprop_register_number(ZFS_PROP_USEDREFRESERV, "usedbyrefreservation", 0,
 340             PROP_READONLY,
 341             ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME, "<size>", "USEDREFRESERV");
 342         zprop_register_number(ZFS_PROP_USERREFS, "userrefs", 0, PROP_READONLY,
 343             ZFS_TYPE_SNAPSHOT, "<count>", "USERREFS");
 344         zprop_register_number(ZFS_PROP_WRITTEN, "written", 0, PROP_READONLY,
 345             ZFS_TYPE_DATASET, "<size>", "WRITTEN");
 346
 347         /* default number properties */
 348         zprop_register_number(ZFS_PROP_QUOTA, "quota", 0, PROP_DEFAULT,
 349             ZFS_TYPE_FILESYSTEM, "<size> | none", "QUOTA");
 350         zprop_register_number(ZFS_PROP_RESERVATION, "reservation", 0,
 351             PROP_DEFAULT, ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME,
 352             "<size> | none", "RESERV");
 353         zprop_register_number(ZFS_PROP_VOLSIZE, "volsize", 0, PROP_DEFAULT,
 354             ZFS_TYPE_VOLUME, "<size>", "VOLSIZE");
 355         zprop_register_number(ZFS_PROP_REFQUOTA, "refquota", 0, PROP_DEFAULT,
 356             ZFS_TYPE_FILESYSTEM, "<size> | none", "REFQUOTA");
 357         zprop_register_number(ZFS_PROP_REFRESERVATION, "refreservation", 0,
 358             PROP_DEFAULT, ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME,
 359             "<size> | none", "REFRESERV");
 360
 361         /* inherit number properties */
 362         zprop_register_number(ZFS_PROP_RECORDSIZE, "recordsize",
 363             SPA_MAXBLOCKSIZE, PROP_INHERIT,
 364             ZFS_TYPE_FILESYSTEM, "512 to 128k, power of 2", "RECSIZE");
 365
 366         /* hidden properties */
 367         zprop_register_hidden(ZFS_PROP_CREATETXG, "createtxg", PROP_TYPE_NUMBER,
 368             PROP_READONLY, ZFS_TYPE_DATASET, "CREATETXG");
 369         zprop_register_hidden(ZFS_PROP_NUMCLONES, "numclones", PROP_TYPE_NUMBER,
 370             PROP_READONLY, ZFS_TYPE_SNAPSHOT, "NUMCLONES");
 371         zprop_register_hidden(ZFS_PROP_NAME, "name", PROP_TYPE_STRING,
 372             PROP_READONLY, ZFS_TYPE_DATASET, "NAME");
 373         zprop_register_hidden(ZFS_PROP_ISCSIOPTIONS, "iscsioptions",
 374             PROP_TYPE_STRING, PROP_INHERIT, ZFS_TYPE_VOLUME, "ISCSIOPTIONS");
 375         zprop_register_hidden(ZFS_PROP_STMF_SHAREINFO, "stmf_sbd_lu",
 376             PROP_TYPE_STRING, PROP_INHERIT, ZFS_TYPE_VOLUME,
 377             "STMF_SBD_LU");
 378         zprop_register_hidden(ZFS_PROP_GUID, "guid", PROP_TYPE_NUMBER,
 379             PROP_READONLY, ZFS_TYPE_DATASET, "GUID");
 380         zprop_register_hidden(ZFS_PROP_USERACCOUNTING, "useraccounting",
 381             PROP_TYPE_NUMBER, PROP_READONLY, ZFS_TYPE_DATASET,
 382             "USERACCOUNTING");
 383         zprop_register_hidden(ZFS_PROP_UNIQUE, "unique", PROP_TYPE_NUMBER,
 384             PROP_READONLY, ZFS_TYPE_DATASET, "UNIQUE");
 385         zprop_register_hidden(ZFS_PROP_OBJSETID, "objsetid", PROP_TYPE_NUMBER,
 386             PROP_READONLY, ZFS_TYPE_DATASET, "OBJSETID");
 387
 388         /*
 389          * Property to be removed once libbe is integrated
 390          */
 391         zprop_register_hidden(ZFS_PROP_PRIVATE, "priv_prop",
 392             PROP_TYPE_NUMBER, PROP_READONLY, ZFS_TYPE_FILESYSTEM,
 393             "PRIV_PROP");
 394
 395         /* oddball properties */
 396         zprop_register_impl(ZFS_PROP_CREATION, "creation", PROP_TYPE_NUMBER, 0,
 397             NULL, PROP_READONLY, ZFS_TYPE_DATASET,
 398             "<date>", "CREATION", B_FALSE, B_TRUE, NULL);
 399 }
 400
 401 boolean_t
 402 zfs_prop_delegatable(zfs_prop_t prop)
 403 {
 404         zprop_desc_t *pd = &zfs_prop_table[prop];
 405
 406         /* The mlslabel property is never delegatable. */
 407         if (prop == ZFS_PROP_MLSLABEL)
 408                 return (B_FALSE);
 409
 410         return (pd->pd_attr != PROP_READONLY);
 411 }
 412
 413 /*
 414  * Given a zfs dataset property name, returns the corresponding property ID.
 415  */
 416 zfs_prop_t
 417 zfs_name_to_prop(const char *propname)
 418 {
 419         return (zprop_name_to_prop(propname, ZFS_TYPE_DATASET));
 420 }
 421
 422 /*
 423  * For user property names, we allow all lowercase alphanumeric characters, plus
 424  * a few useful punctuation characters.
 425  */
 426 static int
 427 valid_char(char c)
 428 {
 429         return ((c >= 'a' && c <= 'z') ||
 430             (c >= '0' && c <= '9') ||
 431             c == '-' || c == '_' || c == '.' || c == ':');
 432 }
 433
 434 /*
 435  * Returns true if this is a valid user-defined property (one with a ':').
 436  */
 437 boolean_t
 438 zfs_prop_user(const char *name)
 439 {
 440         int i;
 441         char c;
 442         boolean_t foundsep = B_FALSE;
 443
 444         for (i = 0; i < strlen(name); i++) {
 445                 c = name[i];
 446                 if (!valid_char(c))
 447                         return (B_FALSE);
 448                 if (c == ':')
 449                         foundsep = B_TRUE;
 450         }
 451
 452         if (!foundsep)
 453                 return (B_FALSE);
 454
 455         return (B_TRUE);
 456 }
 457
 458 /*
 459  * Returns true if this is a valid userspace-type property (one with a '@').
 460  * Note that after the @, any character is valid (eg, another @, for SID
 461  * user@domain).
 462  */
 463 boolean_t
 464 zfs_prop_userquota(const char *name)
 465 {
 466         zfs_userquota_prop_t prop;
 467
 468         for (prop = 0; prop < ZFS_NUM_USERQUOTA_PROPS; prop++) {
 469                 if (strncmp(name, zfs_userquota_prop_prefixes[prop],
 470                     strlen(zfs_userquota_prop_prefixes[prop])) == 0) {
 471                         return (B_TRUE);
 472                 }
 473         }
 474
 475         return (B_FALSE);
 476 }
 477
 478 /*
 479  * Returns true if this is a valid written@ property.
 480  * Note that after the @, any character is valid (eg, another @, for
 481  * written@pool/fs@origin).
 482  */
 483 boolean_t
 484 zfs_prop_written(const char *name)
 485 {
 486         static const char *prefix = "written@";
 487         return (strncmp(name, prefix, strlen(prefix)) == 0);
 488 }
 489
 490 /*
 491  * Tables of index types, plus functions to convert between the user view
 492  * (strings) and internal representation (uint64_t).
 493  */
 494 int
 495 zfs_prop_string_to_index(zfs_prop_t prop, const char *string, uint64_t *index)
 496 {
 497         return (zprop_string_to_index(prop, string, index, ZFS_TYPE_DATASET));
 498 }
 499
 500 int
 501 zfs_prop_index_to_string(zfs_prop_t prop, uint64_t index, const char **string)
 502 {
 503         return (zprop_index_to_string(prop, index, string, ZFS_TYPE_DATASET));
 504 }
 505
 506 uint64_t
 507 zfs_prop_random_value(zfs_prop_t prop, uint64_t seed)
 508 {
 509         return (zprop_random_value(prop, seed, ZFS_TYPE_DATASET));
 510 }
 511
 512 /*
 513  * Returns TRUE if the property applies to any of the given dataset types.
 514  */
 515 boolean_t
 516 zfs_prop_valid_for_type(int prop, zfs_type_t types)
 517 {
 518         return (zprop_valid_for_type(prop, types));
 519 }
 520
 521 zprop_type_t
 522 zfs_prop_get_type(zfs_prop_t prop)
 523 {
 524         return (zfs_prop_table[prop].pd_proptype);
 525 }
 526
 527 /*
 528  * Returns TRUE if the property is readonly.
 529  */
 530 boolean_t
 531 zfs_prop_readonly(zfs_prop_t prop)
 532 {
 533         return (zfs_prop_table[prop].pd_attr == PROP_READONLY ||
 534             zfs_prop_table[prop].pd_attr == PROP_ONETIME);
 535 }
 536
 537 /*
 538  * Returns TRUE if the property is only allowed to be set once.
 539  */
 540 boolean_t
 541 zfs_prop_setonce(zfs_prop_t prop)
 542 {
 543         return (zfs_prop_table[prop].pd_attr == PROP_ONETIME);
 544 }
 545
 546 const char *
 547 zfs_prop_default_string(zfs_prop_t prop)
 548 {
 549         return (zfs_prop_table[prop].pd_strdefault);
 550 }
 551
 552 uint64_t
 553 zfs_prop_default_numeric(zfs_prop_t prop)
 554 {
 555         return (zfs_prop_table[prop].pd_numdefault);
 556 }
 557
 558 /*
 559  * Given a dataset property ID, returns the corresponding name.
 560  * Assuming the zfs dataset property ID is valid.
 561  */
 562 const char *
 563 zfs_prop_to_name(zfs_prop_t prop)
 564 {
 565         return (zfs_prop_table[prop].pd_name);
 566 }
 567
 568 /*
 569  * Returns TRUE if the property is inheritable.
 570  */
 571 boolean_t
 572 zfs_prop_inheritable(zfs_prop_t prop)
 573 {
 574         return (zfs_prop_table[prop].pd_attr == PROP_INHERIT ||
 575             zfs_prop_table[prop].pd_attr == PROP_ONETIME);
 576 }
 577
 578 #ifndef _KERNEL
 579
 580 /*
 581  * Returns a string describing the set of acceptable values for the given
 582  * zfs property, or NULL if it cannot be set.
 583  */
 584 const char *
 585 zfs_prop_values(zfs_prop_t prop)
 586 {
 587         return (zfs_prop_table[prop].pd_values);
 588 }
 589
 590 /*
 591  * Returns TRUE if this property is a string type.  Note that index types
 592  * (compression, checksum) are treated as strings in userland, even though they
 593  * are stored numerically on disk.
 594  */
 595 int
 596 zfs_prop_is_string(zfs_prop_t prop)
 597 {
 598         return (zfs_prop_table[prop].pd_proptype == PROP_TYPE_STRING ||
 599             zfs_prop_table[prop].pd_proptype == PROP_TYPE_INDEX);
 600 }
 601
 602 /*
 603  * Returns the column header for the given property.  Used only in
 604  * 'zfs list -o', but centralized here with the other property information.
 605  */
 606 const char *
 607 zfs_prop_column_name(zfs_prop_t prop)
 608 {
 609         return (zfs_prop_table[prop].pd_colname);
 610 }
 611
 612 /*
 613  * Returns whether the given property should be displayed right-justified for
 614  * 'zfs list'.
 615  */
 616 boolean_t
 617 zfs_prop_align_right(zfs_prop_t prop)
 618 {
 619         return (zfs_prop_table[prop].pd_rightalign);
 620 }
 621
 622 #endif
 623
 624 #if defined(_KERNEL) && defined(HAVE_SPL)
 625
 626 static int zcommon_init(void) { return 0; }
 627 static int zcommon_fini(void) { return 0; }
 628
 629 spl_module_init(zcommon_init);
 630 spl_module_exit(zcommon_fini);
 631
 632 MODULE_DESCRIPTION("Generic ZFS support");
 633 MODULE_AUTHOR(ZFS_META_AUTHOR);
 634 MODULE_LICENSE(ZFS_META_LICENSE);
 635
 636 /* zfs dataset property functions */
 637 EXPORT_SYMBOL(zfs_userquota_prop_prefixes);
 638 EXPORT_SYMBOL(zfs_prop_init);
 639 EXPORT_SYMBOL(zfs_prop_get_type);
 640 EXPORT_SYMBOL(zfs_prop_get_table);
 641 EXPORT_SYMBOL(zfs_prop_delegatable);
 642
 643 /* Dataset property functions shared between libzfs and kernel. */
 644 EXPORT_SYMBOL(zfs_prop_default_string);
 645 EXPORT_SYMBOL(zfs_prop_default_numeric);
 646 EXPORT_SYMBOL(zfs_prop_readonly);
 647 EXPORT_SYMBOL(zfs_prop_inheritable);
 648 EXPORT_SYMBOL(zfs_prop_setonce);
 649 EXPORT_SYMBOL(zfs_prop_to_name);
 650 EXPORT_SYMBOL(zfs_name_to_prop);
 651 EXPORT_SYMBOL(zfs_prop_user);
 652 EXPORT_SYMBOL(zfs_prop_userquota);
 653 EXPORT_SYMBOL(zfs_prop_index_to_string);
 654 EXPORT_SYMBOL(zfs_prop_string_to_index);
 655 EXPORT_SYMBOL(zfs_prop_valid_for_type);
 656
 657 #endif