mirror of
https://git.proxmox.com/git/mirror_zfs.git
synced 2024-12-26 03:09:34 +03:00
82a37189aa
The current ZFS implementation stores xattrs on disk using a hidden
directory. In this directory a file name represents the xattr name
and the file contexts are the xattr binary data. This approach is
very flexible and allows for arbitrarily large xattrs. However,
it also suffers from a significant performance penalty. Accessing
a single xattr can requires up to three disk seeks.
1) Lookup the dnode object.
2) Lookup the dnodes's xattr directory object.
3) Lookup the xattr object in the directory.
To avoid this performance penalty Linux filesystems such as ext3
and xfs try to store the xattr as part of the inode on disk. When
the xattr is to large to store in the inode then a single external
block is allocated for them. In practice most xattrs are small
and this approach works well.
The addition of System Attributes (SA) to zfs provides us a clean
way to make this optimization. When the dataset property 'xattr=sa'
is set then xattrs will be preferentially stored as System Attributes.
This allows tiny xattrs (~100 bytes) to be stored with the dnode and
up to 64k of xattrs to be stored in the spill block. If additional
xattr space is required, which is unlikely under Linux, they will be
stored using the traditional directory approach.
This optimization results in roughly a 3x performance improvement
when accessing xattrs which brings zfs roughly to parity with ext4
and xfs (see table below). When multiple xattrs are stored per-file
the performance improvements are even greater because all of the
xattrs stored in the spill block will be cached.
However, by default SA based xattrs are disabled in the Linux port
to maximize compatibility with other implementations. If you do
enable SA based xattrs then they will not be visible on platforms
which do not support this feature.
----------------------------------------------------------------------
Time in seconds to get/set one xattr of N bytes on 100,000 files
------+--------------------------------+------------------------------
| setxattr | getxattr
bytes | ext4 xfs zfs-dir zfs-sa | ext4 xfs zfs-dir zfs-sa
------+--------------------------------+------------------------------
1 | 2.33 31.88 21.50 4.57 | 2.35 2.64 6.29 2.43
32 | 2.79 30.68 21.98 4.60 | 2.44 2.59 6.78 2.48
256 | 3.25 31.99 21.36 5.92 | 2.32 2.71 6.22 3.14
1024 | 3.30 32.61 22.83 8.45 | 2.40 2.79 6.24 3.27
4096 | 3.57 317.46 22.52 10.73 | 2.78 28.62 6.90 3.94
16384 | n/a 2342.39 34.30 19.20 | n/a 45.44 145.90 7.55
65536 | n/a 2941.39 128.15 131.32* | n/a 141.92 256.85 262.12*
Legend:
* ext4 - Stock RHEL6.1 ext4 mounted with '-o user_xattr'.
* xfs - Stock RHEL6.1 xfs mounted with default options.
* zfs-dir - Directory based xattrs only.
* zfs-sa - Prefer SAs but spill in to directories as needed, a
trailing * indicates overflow in to directories occured.
NOTE: Ext4 supports 4096 bytes of xattr name/value pairs per file.
NOTE: XFS and ZFS have no limit on xattr name/value pairs per file.
NOTE: Linux limits individual name/value pairs to 65536 bytes.
NOTE: All setattr/getattr's were done after dropping the cache.
NOTE: All tests were run against a single hard drive.
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Issue #443
642 lines
20 KiB
C
642 lines
20 KiB
C
/*
|
|
* CDDL HEADER START
|
|
*
|
|
* The contents of this file are subject to the terms of the
|
|
* Common Development and Distribution License (the "License").
|
|
* You may not use this file except in compliance with the License.
|
|
*
|
|
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
|
|
* or http://www.opensolaris.org/os/licensing.
|
|
* See the License for the specific language governing permissions
|
|
* and limitations under the License.
|
|
*
|
|
* When distributing Covered Code, include this CDDL HEADER in each
|
|
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
|
|
* If applicable, add the following below this CDDL HEADER, with the
|
|
* fields enclosed by brackets "[]" replaced with your own identifying
|
|
* information: Portions Copyright [yyyy] [name of copyright owner]
|
|
*
|
|
* CDDL HEADER END
|
|
*/
|
|
/*
|
|
* Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
|
|
* Copyright (c) 2011 by Delphix. All rights reserved.
|
|
*/
|
|
|
|
/* Portions Copyright 2010 Robert Milkowski */
|
|
|
|
#include <sys/zio.h>
|
|
#include <sys/spa.h>
|
|
#include <sys/u8_textprep.h>
|
|
#include <sys/zfs_acl.h>
|
|
#include <sys/zfs_ioctl.h>
|
|
#include <sys/zfs_znode.h>
|
|
|
|
#include "zfs_prop.h"
|
|
#include "zfs_deleg.h"
|
|
|
|
#if defined(_KERNEL)
|
|
#include <sys/systm.h>
|
|
#else
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <ctype.h>
|
|
#endif
|
|
|
|
static zprop_desc_t zfs_prop_table[ZFS_NUM_PROPS];
|
|
|
|
/* Note this is indexed by zfs_userquota_prop_t, keep the order the same */
|
|
const char *zfs_userquota_prop_prefixes[] = {
|
|
"userused@",
|
|
"userquota@",
|
|
"groupused@",
|
|
"groupquota@"
|
|
};
|
|
|
|
zprop_desc_t *
|
|
zfs_prop_get_table(void)
|
|
{
|
|
return (zfs_prop_table);
|
|
}
|
|
|
|
void
|
|
zfs_prop_init(void)
|
|
{
|
|
static zprop_index_t checksum_table[] = {
|
|
{ "on", ZIO_CHECKSUM_ON },
|
|
{ "off", ZIO_CHECKSUM_OFF },
|
|
{ "fletcher2", ZIO_CHECKSUM_FLETCHER_2 },
|
|
{ "fletcher4", ZIO_CHECKSUM_FLETCHER_4 },
|
|
{ "sha256", ZIO_CHECKSUM_SHA256 },
|
|
{ NULL }
|
|
};
|
|
|
|
static zprop_index_t dedup_table[] = {
|
|
{ "on", ZIO_CHECKSUM_ON },
|
|
{ "off", ZIO_CHECKSUM_OFF },
|
|
{ "verify", ZIO_CHECKSUM_ON | ZIO_CHECKSUM_VERIFY },
|
|
{ "sha256", ZIO_CHECKSUM_SHA256 },
|
|
{ "sha256,verify",
|
|
ZIO_CHECKSUM_SHA256 | ZIO_CHECKSUM_VERIFY },
|
|
{ NULL }
|
|
};
|
|
|
|
static zprop_index_t compress_table[] = {
|
|
{ "on", ZIO_COMPRESS_ON },
|
|
{ "off", ZIO_COMPRESS_OFF },
|
|
{ "lzjb", ZIO_COMPRESS_LZJB },
|
|
{ "gzip", ZIO_COMPRESS_GZIP_6 }, /* gzip default */
|
|
{ "gzip-1", ZIO_COMPRESS_GZIP_1 },
|
|
{ "gzip-2", ZIO_COMPRESS_GZIP_2 },
|
|
{ "gzip-3", ZIO_COMPRESS_GZIP_3 },
|
|
{ "gzip-4", ZIO_COMPRESS_GZIP_4 },
|
|
{ "gzip-5", ZIO_COMPRESS_GZIP_5 },
|
|
{ "gzip-6", ZIO_COMPRESS_GZIP_6 },
|
|
{ "gzip-7", ZIO_COMPRESS_GZIP_7 },
|
|
{ "gzip-8", ZIO_COMPRESS_GZIP_8 },
|
|
{ "gzip-9", ZIO_COMPRESS_GZIP_9 },
|
|
{ "zle", ZIO_COMPRESS_ZLE },
|
|
{ NULL }
|
|
};
|
|
|
|
static zprop_index_t snapdir_table[] = {
|
|
{ "hidden", ZFS_SNAPDIR_HIDDEN },
|
|
{ "visible", ZFS_SNAPDIR_VISIBLE },
|
|
{ NULL }
|
|
};
|
|
|
|
static zprop_index_t acl_inherit_table[] = {
|
|
{ "discard", ZFS_ACL_DISCARD },
|
|
{ "noallow", ZFS_ACL_NOALLOW },
|
|
{ "restricted", ZFS_ACL_RESTRICTED },
|
|
{ "passthrough", ZFS_ACL_PASSTHROUGH },
|
|
{ "secure", ZFS_ACL_RESTRICTED }, /* bkwrd compatability */
|
|
{ "passthrough-x", ZFS_ACL_PASSTHROUGH_X },
|
|
{ NULL }
|
|
};
|
|
|
|
static zprop_index_t case_table[] = {
|
|
{ "sensitive", ZFS_CASE_SENSITIVE },
|
|
{ "insensitive", ZFS_CASE_INSENSITIVE },
|
|
{ "mixed", ZFS_CASE_MIXED },
|
|
{ NULL }
|
|
};
|
|
|
|
static zprop_index_t copies_table[] = {
|
|
{ "1", 1 },
|
|
{ "2", 2 },
|
|
{ "3", 3 },
|
|
{ NULL }
|
|
};
|
|
|
|
/*
|
|
* Use the unique flags we have to send to u8_strcmp() and/or
|
|
* u8_textprep() to represent the various normalization property
|
|
* values.
|
|
*/
|
|
static zprop_index_t normalize_table[] = {
|
|
{ "none", 0 },
|
|
{ "formD", U8_TEXTPREP_NFD },
|
|
{ "formKC", U8_TEXTPREP_NFKC },
|
|
{ "formC", U8_TEXTPREP_NFC },
|
|
{ "formKD", U8_TEXTPREP_NFKD },
|
|
{ NULL }
|
|
};
|
|
|
|
static zprop_index_t version_table[] = {
|
|
{ "1", 1 },
|
|
{ "2", 2 },
|
|
{ "3", 3 },
|
|
{ "4", 4 },
|
|
{ "5", 5 },
|
|
{ "current", ZPL_VERSION },
|
|
{ NULL }
|
|
};
|
|
|
|
static zprop_index_t boolean_table[] = {
|
|
{ "off", 0 },
|
|
{ "on", 1 },
|
|
{ NULL }
|
|
};
|
|
|
|
static zprop_index_t logbias_table[] = {
|
|
{ "latency", ZFS_LOGBIAS_LATENCY },
|
|
{ "throughput", ZFS_LOGBIAS_THROUGHPUT },
|
|
{ NULL }
|
|
};
|
|
|
|
static zprop_index_t canmount_table[] = {
|
|
{ "off", ZFS_CANMOUNT_OFF },
|
|
{ "on", ZFS_CANMOUNT_ON },
|
|
{ "noauto", ZFS_CANMOUNT_NOAUTO },
|
|
{ NULL }
|
|
};
|
|
|
|
static zprop_index_t cache_table[] = {
|
|
{ "none", ZFS_CACHE_NONE },
|
|
{ "metadata", ZFS_CACHE_METADATA },
|
|
{ "all", ZFS_CACHE_ALL },
|
|
{ NULL }
|
|
};
|
|
|
|
static zprop_index_t sync_table[] = {
|
|
{ "standard", ZFS_SYNC_STANDARD },
|
|
{ "always", ZFS_SYNC_ALWAYS },
|
|
{ "disabled", ZFS_SYNC_DISABLED },
|
|
{ NULL }
|
|
};
|
|
|
|
static zprop_index_t xattr_table[] = {
|
|
{ "off", ZFS_XATTR_OFF },
|
|
{ "on", ZFS_XATTR_DIR },
|
|
{ "sa", ZFS_XATTR_SA },
|
|
{ "dir", ZFS_XATTR_DIR },
|
|
{ NULL }
|
|
};
|
|
|
|
/* inherit index properties */
|
|
zprop_register_index(ZFS_PROP_SYNC, "sync", ZFS_SYNC_STANDARD,
|
|
PROP_INHERIT, ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME,
|
|
"standard | always | disabled", "SYNC",
|
|
sync_table);
|
|
zprop_register_index(ZFS_PROP_CHECKSUM, "checksum",
|
|
ZIO_CHECKSUM_DEFAULT, PROP_INHERIT, ZFS_TYPE_FILESYSTEM |
|
|
ZFS_TYPE_VOLUME,
|
|
"on | off | fletcher2 | fletcher4 | sha256", "CHECKSUM",
|
|
checksum_table);
|
|
zprop_register_index(ZFS_PROP_DEDUP, "dedup", ZIO_CHECKSUM_OFF,
|
|
PROP_INHERIT, ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME,
|
|
"on | off | verify | sha256[,verify]", "DEDUP",
|
|
dedup_table);
|
|
zprop_register_index(ZFS_PROP_COMPRESSION, "compression",
|
|
ZIO_COMPRESS_DEFAULT, PROP_INHERIT,
|
|
ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME,
|
|
"on | off | lzjb | gzip | gzip-[1-9] | zle", "COMPRESS",
|
|
compress_table);
|
|
zprop_register_index(ZFS_PROP_SNAPDIR, "snapdir", ZFS_SNAPDIR_HIDDEN,
|
|
PROP_INHERIT, ZFS_TYPE_FILESYSTEM,
|
|
"hidden | visible", "SNAPDIR", snapdir_table);
|
|
zprop_register_index(ZFS_PROP_ACLINHERIT, "aclinherit",
|
|
ZFS_ACL_RESTRICTED, PROP_INHERIT, ZFS_TYPE_FILESYSTEM,
|
|
"discard | noallow | restricted | passthrough | passthrough-x",
|
|
"ACLINHERIT", acl_inherit_table);
|
|
zprop_register_index(ZFS_PROP_COPIES, "copies", 1, PROP_INHERIT,
|
|
ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME,
|
|
"1 | 2 | 3", "COPIES", copies_table);
|
|
zprop_register_index(ZFS_PROP_PRIMARYCACHE, "primarycache",
|
|
ZFS_CACHE_ALL, PROP_INHERIT,
|
|
ZFS_TYPE_FILESYSTEM | ZFS_TYPE_SNAPSHOT | ZFS_TYPE_VOLUME,
|
|
"all | none | metadata", "PRIMARYCACHE", cache_table);
|
|
zprop_register_index(ZFS_PROP_SECONDARYCACHE, "secondarycache",
|
|
ZFS_CACHE_ALL, PROP_INHERIT,
|
|
ZFS_TYPE_FILESYSTEM | ZFS_TYPE_SNAPSHOT | ZFS_TYPE_VOLUME,
|
|
"all | none | metadata", "SECONDARYCACHE", cache_table);
|
|
zprop_register_index(ZFS_PROP_LOGBIAS, "logbias", ZFS_LOGBIAS_LATENCY,
|
|
PROP_INHERIT, ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME,
|
|
"latency | throughput", "LOGBIAS", logbias_table);
|
|
zprop_register_index(ZFS_PROP_XATTR, "xattr", ZFS_XATTR_DIR,
|
|
PROP_INHERIT, ZFS_TYPE_FILESYSTEM | ZFS_TYPE_SNAPSHOT,
|
|
"on | off | dir | sa", "XATTR", xattr_table);
|
|
|
|
/* inherit index (boolean) properties */
|
|
zprop_register_index(ZFS_PROP_ATIME, "atime", 1, PROP_INHERIT,
|
|
ZFS_TYPE_FILESYSTEM, "on | off", "ATIME", boolean_table);
|
|
zprop_register_index(ZFS_PROP_DEVICES, "devices", 1, PROP_INHERIT,
|
|
ZFS_TYPE_FILESYSTEM | ZFS_TYPE_SNAPSHOT, "on | off", "DEVICES",
|
|
boolean_table);
|
|
zprop_register_index(ZFS_PROP_EXEC, "exec", 1, PROP_INHERIT,
|
|
ZFS_TYPE_FILESYSTEM | ZFS_TYPE_SNAPSHOT, "on | off", "EXEC",
|
|
boolean_table);
|
|
zprop_register_index(ZFS_PROP_SETUID, "setuid", 1, PROP_INHERIT,
|
|
ZFS_TYPE_FILESYSTEM | ZFS_TYPE_SNAPSHOT, "on | off", "SETUID",
|
|
boolean_table);
|
|
zprop_register_index(ZFS_PROP_READONLY, "readonly", 0, PROP_INHERIT,
|
|
ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME, "on | off", "RDONLY",
|
|
boolean_table);
|
|
zprop_register_index(ZFS_PROP_ZONED, "zoned", 0, PROP_INHERIT,
|
|
ZFS_TYPE_FILESYSTEM, "on | off", "ZONED", boolean_table);
|
|
zprop_register_index(ZFS_PROP_VSCAN, "vscan", 0, PROP_INHERIT,
|
|
ZFS_TYPE_FILESYSTEM, "on | off", "VSCAN", boolean_table);
|
|
zprop_register_index(ZFS_PROP_NBMAND, "nbmand", 0, PROP_INHERIT,
|
|
ZFS_TYPE_FILESYSTEM | ZFS_TYPE_SNAPSHOT, "on | off", "NBMAND",
|
|
boolean_table);
|
|
|
|
/* default index properties */
|
|
zprop_register_index(ZFS_PROP_VERSION, "version", 0, PROP_DEFAULT,
|
|
ZFS_TYPE_FILESYSTEM | ZFS_TYPE_SNAPSHOT,
|
|
"1 | 2 | 3 | 4 | current", "VERSION", version_table);
|
|
zprop_register_index(ZFS_PROP_CANMOUNT, "canmount", ZFS_CANMOUNT_ON,
|
|
PROP_DEFAULT, ZFS_TYPE_FILESYSTEM, "on | off | noauto",
|
|
"CANMOUNT", canmount_table);
|
|
|
|
/* readonly index (boolean) properties */
|
|
zprop_register_index(ZFS_PROP_MOUNTED, "mounted", 0, PROP_READONLY,
|
|
ZFS_TYPE_FILESYSTEM, "yes | no", "MOUNTED", boolean_table);
|
|
zprop_register_index(ZFS_PROP_DEFER_DESTROY, "defer_destroy", 0,
|
|
PROP_READONLY, ZFS_TYPE_SNAPSHOT, "yes | no", "DEFER_DESTROY",
|
|
boolean_table);
|
|
|
|
/* set once index properties */
|
|
zprop_register_index(ZFS_PROP_NORMALIZE, "normalization", 0,
|
|
PROP_ONETIME, ZFS_TYPE_FILESYSTEM | ZFS_TYPE_SNAPSHOT,
|
|
"none | formC | formD | formKC | formKD", "NORMALIZATION",
|
|
normalize_table);
|
|
zprop_register_index(ZFS_PROP_CASE, "casesensitivity",
|
|
ZFS_CASE_SENSITIVE, PROP_ONETIME, ZFS_TYPE_FILESYSTEM |
|
|
ZFS_TYPE_SNAPSHOT,
|
|
"sensitive | insensitive | mixed", "CASE", case_table);
|
|
|
|
/* set once index (boolean) properties */
|
|
zprop_register_index(ZFS_PROP_UTF8ONLY, "utf8only", 0, PROP_ONETIME,
|
|
ZFS_TYPE_FILESYSTEM | ZFS_TYPE_SNAPSHOT,
|
|
"on | off", "UTF8ONLY", boolean_table);
|
|
|
|
/* string properties */
|
|
zprop_register_string(ZFS_PROP_ORIGIN, "origin", NULL, PROP_READONLY,
|
|
ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME, "<snapshot>", "ORIGIN");
|
|
zprop_register_string(ZFS_PROP_MOUNTPOINT, "mountpoint", "/",
|
|
PROP_INHERIT, ZFS_TYPE_FILESYSTEM, "<path> | legacy | none",
|
|
"MOUNTPOINT");
|
|
zprop_register_string(ZFS_PROP_SHARENFS, "sharenfs", "off",
|
|
PROP_INHERIT, ZFS_TYPE_FILESYSTEM, "on | off | share(1M) options",
|
|
"SHARENFS");
|
|
zprop_register_string(ZFS_PROP_TYPE, "type", NULL, PROP_READONLY,
|
|
ZFS_TYPE_DATASET, "filesystem | volume | snapshot", "TYPE");
|
|
zprop_register_string(ZFS_PROP_SHARESMB, "sharesmb", "off",
|
|
PROP_INHERIT, ZFS_TYPE_FILESYSTEM,
|
|
"on | off | sharemgr(1M) options", "SHARESMB");
|
|
zprop_register_string(ZFS_PROP_MLSLABEL, "mlslabel",
|
|
ZFS_MLSLABEL_DEFAULT, PROP_INHERIT, ZFS_TYPE_DATASET,
|
|
"<sensitivity label>", "MLSLABEL");
|
|
|
|
/* readonly number properties */
|
|
zprop_register_number(ZFS_PROP_USED, "used", 0, PROP_READONLY,
|
|
ZFS_TYPE_DATASET, "<size>", "USED");
|
|
zprop_register_number(ZFS_PROP_AVAILABLE, "available", 0, PROP_READONLY,
|
|
ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME, "<size>", "AVAIL");
|
|
zprop_register_number(ZFS_PROP_REFERENCED, "referenced", 0,
|
|
PROP_READONLY, ZFS_TYPE_DATASET, "<size>", "REFER");
|
|
zprop_register_number(ZFS_PROP_COMPRESSRATIO, "compressratio", 0,
|
|
PROP_READONLY, ZFS_TYPE_DATASET,
|
|
"<1.00x or higher if compressed>", "RATIO");
|
|
zprop_register_number(ZFS_PROP_REFRATIO, "refcompressratio", 0,
|
|
PROP_READONLY, ZFS_TYPE_DATASET,
|
|
"<1.00x or higher if compressed>", "REFRATIO");
|
|
zprop_register_number(ZFS_PROP_VOLBLOCKSIZE, "volblocksize",
|
|
ZVOL_DEFAULT_BLOCKSIZE, PROP_ONETIME,
|
|
ZFS_TYPE_VOLUME, "512 to 128k, power of 2", "VOLBLOCK");
|
|
zprop_register_number(ZFS_PROP_USEDSNAP, "usedbysnapshots", 0,
|
|
PROP_READONLY, ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME, "<size>",
|
|
"USEDSNAP");
|
|
zprop_register_number(ZFS_PROP_USEDDS, "usedbydataset", 0,
|
|
PROP_READONLY, ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME, "<size>",
|
|
"USEDDS");
|
|
zprop_register_number(ZFS_PROP_USEDCHILD, "usedbychildren", 0,
|
|
PROP_READONLY, ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME, "<size>",
|
|
"USEDCHILD");
|
|
zprop_register_number(ZFS_PROP_USEDREFRESERV, "usedbyrefreservation", 0,
|
|
PROP_READONLY,
|
|
ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME, "<size>", "USEDREFRESERV");
|
|
zprop_register_number(ZFS_PROP_USERREFS, "userrefs", 0, PROP_READONLY,
|
|
ZFS_TYPE_SNAPSHOT, "<count>", "USERREFS");
|
|
|
|
/* default number properties */
|
|
zprop_register_number(ZFS_PROP_QUOTA, "quota", 0, PROP_DEFAULT,
|
|
ZFS_TYPE_FILESYSTEM, "<size> | none", "QUOTA");
|
|
zprop_register_number(ZFS_PROP_RESERVATION, "reservation", 0,
|
|
PROP_DEFAULT, ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME,
|
|
"<size> | none", "RESERV");
|
|
zprop_register_number(ZFS_PROP_VOLSIZE, "volsize", 0, PROP_DEFAULT,
|
|
ZFS_TYPE_VOLUME, "<size>", "VOLSIZE");
|
|
zprop_register_number(ZFS_PROP_REFQUOTA, "refquota", 0, PROP_DEFAULT,
|
|
ZFS_TYPE_FILESYSTEM, "<size> | none", "REFQUOTA");
|
|
zprop_register_number(ZFS_PROP_REFRESERVATION, "refreservation", 0,
|
|
PROP_DEFAULT, ZFS_TYPE_FILESYSTEM | ZFS_TYPE_VOLUME,
|
|
"<size> | none", "REFRESERV");
|
|
|
|
/* inherit number properties */
|
|
zprop_register_number(ZFS_PROP_RECORDSIZE, "recordsize",
|
|
SPA_MAXBLOCKSIZE, PROP_INHERIT,
|
|
ZFS_TYPE_FILESYSTEM, "512 to 128k, power of 2", "RECSIZE");
|
|
|
|
/* hidden properties */
|
|
zprop_register_hidden(ZFS_PROP_CREATETXG, "createtxg", PROP_TYPE_NUMBER,
|
|
PROP_READONLY, ZFS_TYPE_DATASET, "CREATETXG");
|
|
zprop_register_hidden(ZFS_PROP_NUMCLONES, "numclones", PROP_TYPE_NUMBER,
|
|
PROP_READONLY, ZFS_TYPE_SNAPSHOT, "NUMCLONES");
|
|
zprop_register_hidden(ZFS_PROP_NAME, "name", PROP_TYPE_STRING,
|
|
PROP_READONLY, ZFS_TYPE_DATASET, "NAME");
|
|
zprop_register_hidden(ZFS_PROP_ISCSIOPTIONS, "iscsioptions",
|
|
PROP_TYPE_STRING, PROP_INHERIT, ZFS_TYPE_VOLUME, "ISCSIOPTIONS");
|
|
zprop_register_hidden(ZFS_PROP_STMF_SHAREINFO, "stmf_sbd_lu",
|
|
PROP_TYPE_STRING, PROP_INHERIT, ZFS_TYPE_VOLUME,
|
|
"STMF_SBD_LU");
|
|
zprop_register_hidden(ZFS_PROP_GUID, "guid", PROP_TYPE_NUMBER,
|
|
PROP_READONLY, ZFS_TYPE_DATASET, "GUID");
|
|
zprop_register_hidden(ZFS_PROP_USERACCOUNTING, "useraccounting",
|
|
PROP_TYPE_NUMBER, PROP_READONLY, ZFS_TYPE_DATASET,
|
|
"USERACCOUNTING");
|
|
zprop_register_hidden(ZFS_PROP_UNIQUE, "unique", PROP_TYPE_NUMBER,
|
|
PROP_READONLY, ZFS_TYPE_DATASET, "UNIQUE");
|
|
zprop_register_hidden(ZFS_PROP_OBJSETID, "objsetid", PROP_TYPE_NUMBER,
|
|
PROP_READONLY, ZFS_TYPE_DATASET, "OBJSETID");
|
|
|
|
/*
|
|
* Property to be removed once libbe is integrated
|
|
*/
|
|
zprop_register_hidden(ZFS_PROP_PRIVATE, "priv_prop",
|
|
PROP_TYPE_NUMBER, PROP_READONLY, ZFS_TYPE_FILESYSTEM,
|
|
"PRIV_PROP");
|
|
|
|
/* oddball properties */
|
|
zprop_register_impl(ZFS_PROP_CREATION, "creation", PROP_TYPE_NUMBER, 0,
|
|
NULL, PROP_READONLY, ZFS_TYPE_DATASET,
|
|
"<date>", "CREATION", B_FALSE, B_TRUE, NULL);
|
|
}
|
|
|
|
boolean_t
|
|
zfs_prop_delegatable(zfs_prop_t prop)
|
|
{
|
|
zprop_desc_t *pd = &zfs_prop_table[prop];
|
|
|
|
/* The mlslabel property is never delegatable. */
|
|
if (prop == ZFS_PROP_MLSLABEL)
|
|
return (B_FALSE);
|
|
|
|
return (pd->pd_attr != PROP_READONLY);
|
|
}
|
|
|
|
/*
|
|
* Given a zfs dataset property name, returns the corresponding property ID.
|
|
*/
|
|
zfs_prop_t
|
|
zfs_name_to_prop(const char *propname)
|
|
{
|
|
return (zprop_name_to_prop(propname, ZFS_TYPE_DATASET));
|
|
}
|
|
|
|
/*
|
|
* For user property names, we allow all lowercase alphanumeric characters, plus
|
|
* a few useful punctuation characters.
|
|
*/
|
|
static int
|
|
valid_char(char c)
|
|
{
|
|
return ((c >= 'a' && c <= 'z') ||
|
|
(c >= '0' && c <= '9') ||
|
|
c == '-' || c == '_' || c == '.' || c == ':');
|
|
}
|
|
|
|
/*
|
|
* Returns true if this is a valid user-defined property (one with a ':').
|
|
*/
|
|
boolean_t
|
|
zfs_prop_user(const char *name)
|
|
{
|
|
int i;
|
|
char c;
|
|
boolean_t foundsep = B_FALSE;
|
|
|
|
for (i = 0; i < strlen(name); i++) {
|
|
c = name[i];
|
|
if (!valid_char(c))
|
|
return (B_FALSE);
|
|
if (c == ':')
|
|
foundsep = B_TRUE;
|
|
}
|
|
|
|
if (!foundsep)
|
|
return (B_FALSE);
|
|
|
|
return (B_TRUE);
|
|
}
|
|
|
|
/*
|
|
* Returns true if this is a valid userspace-type property (one with a '@').
|
|
* Note that after the @, any character is valid (eg, another @, for SID
|
|
* user@domain).
|
|
*/
|
|
boolean_t
|
|
zfs_prop_userquota(const char *name)
|
|
{
|
|
zfs_userquota_prop_t prop;
|
|
|
|
for (prop = 0; prop < ZFS_NUM_USERQUOTA_PROPS; prop++) {
|
|
if (strncmp(name, zfs_userquota_prop_prefixes[prop],
|
|
strlen(zfs_userquota_prop_prefixes[prop])) == 0) {
|
|
return (B_TRUE);
|
|
}
|
|
}
|
|
|
|
return (B_FALSE);
|
|
}
|
|
|
|
/*
|
|
* Tables of index types, plus functions to convert between the user view
|
|
* (strings) and internal representation (uint64_t).
|
|
*/
|
|
int
|
|
zfs_prop_string_to_index(zfs_prop_t prop, const char *string, uint64_t *index)
|
|
{
|
|
return (zprop_string_to_index(prop, string, index, ZFS_TYPE_DATASET));
|
|
}
|
|
|
|
int
|
|
zfs_prop_index_to_string(zfs_prop_t prop, uint64_t index, const char **string)
|
|
{
|
|
return (zprop_index_to_string(prop, index, string, ZFS_TYPE_DATASET));
|
|
}
|
|
|
|
uint64_t
|
|
zfs_prop_random_value(zfs_prop_t prop, uint64_t seed)
|
|
{
|
|
return (zprop_random_value(prop, seed, ZFS_TYPE_DATASET));
|
|
}
|
|
|
|
/*
|
|
* Returns TRUE if the property applies to any of the given dataset types.
|
|
*/
|
|
boolean_t
|
|
zfs_prop_valid_for_type(int prop, zfs_type_t types)
|
|
{
|
|
return (zprop_valid_for_type(prop, types));
|
|
}
|
|
|
|
zprop_type_t
|
|
zfs_prop_get_type(zfs_prop_t prop)
|
|
{
|
|
return (zfs_prop_table[prop].pd_proptype);
|
|
}
|
|
|
|
/*
|
|
* Returns TRUE if the property is readonly.
|
|
*/
|
|
boolean_t
|
|
zfs_prop_readonly(zfs_prop_t prop)
|
|
{
|
|
return (zfs_prop_table[prop].pd_attr == PROP_READONLY ||
|
|
zfs_prop_table[prop].pd_attr == PROP_ONETIME);
|
|
}
|
|
|
|
/*
|
|
* Returns TRUE if the property is only allowed to be set once.
|
|
*/
|
|
boolean_t
|
|
zfs_prop_setonce(zfs_prop_t prop)
|
|
{
|
|
return (zfs_prop_table[prop].pd_attr == PROP_ONETIME);
|
|
}
|
|
|
|
const char *
|
|
zfs_prop_default_string(zfs_prop_t prop)
|
|
{
|
|
return (zfs_prop_table[prop].pd_strdefault);
|
|
}
|
|
|
|
uint64_t
|
|
zfs_prop_default_numeric(zfs_prop_t prop)
|
|
{
|
|
return (zfs_prop_table[prop].pd_numdefault);
|
|
}
|
|
|
|
/*
|
|
* Given a dataset property ID, returns the corresponding name.
|
|
* Assuming the zfs dataset property ID is valid.
|
|
*/
|
|
const char *
|
|
zfs_prop_to_name(zfs_prop_t prop)
|
|
{
|
|
return (zfs_prop_table[prop].pd_name);
|
|
}
|
|
|
|
/*
|
|
* Returns TRUE if the property is inheritable.
|
|
*/
|
|
boolean_t
|
|
zfs_prop_inheritable(zfs_prop_t prop)
|
|
{
|
|
return (zfs_prop_table[prop].pd_attr == PROP_INHERIT ||
|
|
zfs_prop_table[prop].pd_attr == PROP_ONETIME);
|
|
}
|
|
|
|
#ifndef _KERNEL
|
|
|
|
/*
|
|
* Returns a string describing the set of acceptable values for the given
|
|
* zfs property, or NULL if it cannot be set.
|
|
*/
|
|
const char *
|
|
zfs_prop_values(zfs_prop_t prop)
|
|
{
|
|
return (zfs_prop_table[prop].pd_values);
|
|
}
|
|
|
|
/*
|
|
* Returns TRUE if this property is a string type. Note that index types
|
|
* (compression, checksum) are treated as strings in userland, even though they
|
|
* are stored numerically on disk.
|
|
*/
|
|
int
|
|
zfs_prop_is_string(zfs_prop_t prop)
|
|
{
|
|
return (zfs_prop_table[prop].pd_proptype == PROP_TYPE_STRING ||
|
|
zfs_prop_table[prop].pd_proptype == PROP_TYPE_INDEX);
|
|
}
|
|
|
|
/*
|
|
* Returns the column header for the given property. Used only in
|
|
* 'zfs list -o', but centralized here with the other property information.
|
|
*/
|
|
const char *
|
|
zfs_prop_column_name(zfs_prop_t prop)
|
|
{
|
|
return (zfs_prop_table[prop].pd_colname);
|
|
}
|
|
|
|
/*
|
|
* Returns whether the given property should be displayed right-justified for
|
|
* 'zfs list'.
|
|
*/
|
|
boolean_t
|
|
zfs_prop_align_right(zfs_prop_t prop)
|
|
{
|
|
return (zfs_prop_table[prop].pd_rightalign);
|
|
}
|
|
|
|
#endif
|
|
|
|
#if defined(_KERNEL) && defined(HAVE_SPL)
|
|
|
|
static int zcommon_init(void) { return 0; }
|
|
static int zcommon_fini(void) { return 0; }
|
|
|
|
spl_module_init(zcommon_init);
|
|
spl_module_exit(zcommon_fini);
|
|
|
|
MODULE_DESCRIPTION("Generic ZFS support");
|
|
MODULE_AUTHOR(ZFS_META_AUTHOR);
|
|
MODULE_LICENSE(ZFS_META_LICENSE);
|
|
|
|
/* zfs dataset property functions */
|
|
EXPORT_SYMBOL(zfs_userquota_prop_prefixes);
|
|
EXPORT_SYMBOL(zfs_prop_init);
|
|
EXPORT_SYMBOL(zfs_prop_get_type);
|
|
EXPORT_SYMBOL(zfs_prop_get_table);
|
|
EXPORT_SYMBOL(zfs_prop_delegatable);
|
|
|
|
/* Dataset property functions shared between libzfs and kernel. */
|
|
EXPORT_SYMBOL(zfs_prop_default_string);
|
|
EXPORT_SYMBOL(zfs_prop_default_numeric);
|
|
EXPORT_SYMBOL(zfs_prop_readonly);
|
|
EXPORT_SYMBOL(zfs_prop_inheritable);
|
|
EXPORT_SYMBOL(zfs_prop_setonce);
|
|
EXPORT_SYMBOL(zfs_prop_to_name);
|
|
EXPORT_SYMBOL(zfs_name_to_prop);
|
|
EXPORT_SYMBOL(zfs_prop_user);
|
|
EXPORT_SYMBOL(zfs_prop_userquota);
|
|
EXPORT_SYMBOL(zfs_prop_index_to_string);
|
|
EXPORT_SYMBOL(zfs_prop_string_to_index);
|
|
EXPORT_SYMBOL(zfs_prop_valid_for_type);
|
|
|
|
#endif
|