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mirror_zfs/module/zcommon/zfeature_common.c
Jitendra Patidar 361a7e8211
log xattr=sa create/remove/update to ZIL 
As such, there are no specific synchronous semantics defined for
the xattrs. But for xattr=on, it does log to ZIL and zil_commit() is
done, if sync=always is set on dataset. This provides sync semantics
for xattr=on with sync=always set on dataset.

For the xattr=sa implementation, it doesn't log to ZIL, so, even with
sync=always, xattrs are not guaranteed to be synced before xattr call
returns to caller. So, xattr can be lost if system crash happens, before
txg carrying xattr transaction is synced.

This change adds xattr=sa logging to ZIL on xattr create/remove/update
and xattrs are synced to ZIL (zil_commit() done) for sync=always.
This makes xattr=sa behavior similar to xattr=on.

Implementation notes:
The actual logging is fairly straight-forward and does not warrant
additional explanation.
However, it has been 14 years since we last added new TX types
to the ZIL [1], hence this is the first time we do it after the
introduction of zpool features. Therefore, here is an overview of the
feature activation and deactivation workflow:

1. The feature must be enabled. Otherwise, we don't log the new
    record type. This ensures compatibility with older software.
2. The feature is activated per-dataset, since the ZIL is per-dataset.
3. If the feature is enabled and dataset is not for zvol, any append to
    the ZIL chain will activate the feature for the dataset. Likewise
    for starting a new ZIL chain.
4. A dataset that doesn't have a ZIL chain has the feature deactivated.

We ensure (3) by activating on the first zil_commit() after the feature
was enabled. Since activating the features requires waiting for txg
sync, the first zil_commit() after enabling the feature will be slower
than usual. The downside is that this is really a conservative
approximation: even if we never append a 'TX_SETSAXATTR' to the ZIL
chain, we pay the penalty for feature activation. The upside is that the
user is in control of when we pay the penalty, i.e., upon enabling the
feature.

We ensure (4) by hooking into zil_sync(), where ZIL destroy actually
happens.

One more piece on feature activation, since it's spread across
multiple functions:

zil_commit()
  zil_process_commit_list()
    if lwb == NULL // first zil_commit since zil_open
      zil_create()
        if no log block pointer in ZIL header:
          if feature enabled and not active:
	    // CASE 1
            enable, COALESCE txg wait with dmu_tx that allocated the
	    log block
         else // log block was allocated earlier than this zil_open
          if feature enabled and not active:
	    // CASE 2
            enable, EXPLICIT txg wait
    else // already have an in-DRAM LWB
      if feature enabled and not active:
        // this happens when we enable the feature after zil_create
	// CASE 3
        enable, EXPLICIT txg wait

[1] da6c28aaf6

Reviewed-by: Matthew Ahrens <mahrens@delphix.com>
Reviewed-by: Christian Schwarz <christian.schwarz@nutanix.com>
Reviewed-by: Ahelenia Ziemiańska <nabijaczleweli@nabijaczleweli.xyz>
Reviewed-by: Ryan Moeller <freqlabs@FreeBSD.org>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Jitendra Patidar <jitendra.patidar@nutanix.com>
Closes #8768 
Closes #9078
2022-02-22 13:06:43 -08:00

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/*
* 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) 2011, 2018 by Delphix. All rights reserved.
* Copyright (c) 2013 by Saso Kiselkov. All rights reserved.
* Copyright (c) 2013, Joyent, Inc. All rights reserved.
* Copyright (c) 2014, Nexenta Systems, Inc. All rights reserved.
* Copyright (c) 2017, Intel Corporation.
* Copyright (c) 2019, Klara Inc.
* Copyright (c) 2019, Allan Jude
*/
#ifndef _KERNEL
#include <errno.h>
#include <string.h>
#include <dirent.h>
#include <search.h>
#include <sys/stat.h>
#endif
#include <sys/debug.h>
#include <sys/fs/zfs.h>
#include <sys/inttypes.h>
#include <sys/types.h>
#include <sys/param.h>
#include <sys/zfs_sysfs.h>
#include "zfeature_common.h"
/*
* Set to disable all feature checks while opening pools, allowing pools with
* unsupported features to be opened. Set for testing only.
*/
boolean_t zfeature_checks_disable = B_FALSE;
zfeature_info_t spa_feature_table[SPA_FEATURES];
/*
* Valid characters for feature guids. This list is mainly for aesthetic
* purposes and could be expanded in the future. There are different allowed
* characters in the guids reverse dns portion (before the colon) and its
* short name (after the colon).
*/
static int
valid_char(char c, boolean_t after_colon)
{
return ((c >= 'a' && c <= 'z') ||
(c >= '0' && c <= '9') ||
(after_colon && c == '_') ||
(!after_colon && (c == '.' || c == '-')));
}
/*
* Every feature guid must contain exactly one colon which separates a reverse
* dns organization name from the feature's "short" name (e.g.
* "com.company:feature_name").
*/
boolean_t
zfeature_is_valid_guid(const char *name)
{
int i;
boolean_t has_colon = B_FALSE;
i = 0;
while (name[i] != '\0') {
char c = name[i++];
if (c == ':') {
if (has_colon)
return (B_FALSE);
has_colon = B_TRUE;
continue;
}
if (!valid_char(c, has_colon))
return (B_FALSE);
}
return (has_colon);
}
boolean_t
zfeature_is_supported(const char *guid)
{
if (zfeature_checks_disable)
return (B_TRUE);
for (spa_feature_t i = 0; i < SPA_FEATURES; i++) {
zfeature_info_t *feature = &spa_feature_table[i];
if (!feature->fi_zfs_mod_supported)
continue;
if (strcmp(guid, feature->fi_guid) == 0)
return (B_TRUE);
}
return (B_FALSE);
}
int
zfeature_lookup_guid(const char *guid, spa_feature_t *res)
{
for (spa_feature_t i = 0; i < SPA_FEATURES; i++) {
zfeature_info_t *feature = &spa_feature_table[i];
if (!feature->fi_zfs_mod_supported)
continue;
if (strcmp(guid, feature->fi_guid) == 0) {
if (res != NULL)
*res = i;
return (0);
}
}
return (ENOENT);
}
int
zfeature_lookup_name(const char *name, spa_feature_t *res)
{
for (spa_feature_t i = 0; i < SPA_FEATURES; i++) {
zfeature_info_t *feature = &spa_feature_table[i];
if (!feature->fi_zfs_mod_supported)
continue;
if (strcmp(name, feature->fi_uname) == 0) {
if (res != NULL)
*res = i;
return (0);
}
}
return (ENOENT);
}
boolean_t
zfeature_depends_on(spa_feature_t fid, spa_feature_t check)
{
zfeature_info_t *feature = &spa_feature_table[fid];
for (int i = 0; feature->fi_depends[i] != SPA_FEATURE_NONE; i++) {
if (feature->fi_depends[i] == check)
return (B_TRUE);
}
return (B_FALSE);
}
static boolean_t
deps_contains_feature(const spa_feature_t *deps, const spa_feature_t feature)
{
for (int i = 0; deps[i] != SPA_FEATURE_NONE; i++)
if (deps[i] == feature)
return (B_TRUE);
return (B_FALSE);
}
#define STRCMP ((int(*)(const void *, const void *))&strcmp)
struct zfs_mod_supported_features {
void *tree;
boolean_t all_features;
};
struct zfs_mod_supported_features *
zfs_mod_list_supported(const char *scope)
{
#if defined(__FreeBSD__) || defined(_KERNEL) || defined(LIB_ZPOOL_BUILD)
(void) scope;
return (NULL);
#else
struct zfs_mod_supported_features *ret = calloc(1, sizeof (*ret));
if (ret == NULL)
return (NULL);
DIR *sysfs_dir = NULL;
char path[128];
if (snprintf(path, sizeof (path), "%s/%s",
ZFS_SYSFS_DIR, scope) < sizeof (path))
sysfs_dir = opendir(path);
if (sysfs_dir == NULL && errno == ENOENT) {
if (snprintf(path, sizeof (path), "%s/%s",
ZFS_SYSFS_ALT_DIR, scope) < sizeof (path))
sysfs_dir = opendir(path);
}
if (sysfs_dir == NULL) {
ret->all_features = errno == ENOENT &&
(access(ZFS_SYSFS_DIR, F_OK) == 0 ||
access(ZFS_SYSFS_ALT_DIR, F_OK) == 0);
return (ret);
}
struct dirent *node;
while ((node = readdir(sysfs_dir)) != NULL) {
if (strcmp(node->d_name, ".") == 0 ||
strcmp(node->d_name, "..") == 0)
continue;
char *name = strdup(node->d_name);
if (name == NULL) {
goto nomem;
}
if (tsearch(name, &ret->tree, STRCMP) == NULL) {
/*
* Don't bother checking for duplicate entries:
* we're iterating a single directory.
*/
free(name);
goto nomem;
}
}
end:
closedir(sysfs_dir);
return (ret);
nomem:
zfs_mod_list_supported_free(ret);
ret = NULL;
goto end;
#endif
}
void
zfs_mod_list_supported_free(struct zfs_mod_supported_features *list)
{
#if !defined(__FreeBSD__) && !defined(_KERNEL) && !defined(LIB_ZPOOL_BUILD)
if (list) {
tdestroy(list->tree, free);
free(list);
}
#else
(void) list;
#endif
}
#if !defined(_KERNEL) && !defined(LIB_ZPOOL_BUILD)
static boolean_t
zfs_mod_supported_impl(const char *scope, const char *name, const char *sysfs)
{
char path[128];
if (snprintf(path, sizeof (path), "%s%s%s%s%s", sysfs,
scope == NULL ? "" : "/", scope ?: "",
name == NULL ? "" : "/", name ?: "") < sizeof (path))
return (access(path, F_OK) == 0);
else
return (B_FALSE);
}
boolean_t
zfs_mod_supported(const char *scope, const char *name,
const struct zfs_mod_supported_features *sfeatures)
{
boolean_t supported;
if (sfeatures != NULL)
return (sfeatures->all_features ||
tfind(name, &sfeatures->tree, STRCMP));
/*
* Check both the primary and alternate sysfs locations to determine
* if the required functionality is supported.
*/
supported = (zfs_mod_supported_impl(scope, name, ZFS_SYSFS_DIR) ||
zfs_mod_supported_impl(scope, name, ZFS_SYSFS_ALT_DIR));
/*
* For backwards compatibility with kernel modules that predate
* supported feature/property checking. Report the feature/property
* as supported if the kernel module is loaded but the requested
* scope directory does not exist.
*/
if (supported == B_FALSE) {
if ((access(ZFS_SYSFS_DIR, F_OK) == 0 &&
!zfs_mod_supported_impl(scope, NULL, ZFS_SYSFS_DIR)) ||
(access(ZFS_SYSFS_ALT_DIR, F_OK) == 0 &&
!zfs_mod_supported_impl(scope, NULL, ZFS_SYSFS_ALT_DIR))) {
supported = B_TRUE;
}
}
return (supported);
}
#endif
static boolean_t
zfs_mod_supported_feature(const char *name,
const struct zfs_mod_supported_features *sfeatures)
{
/*
* The zfs module spa_feature_table[], whether in-kernel or in
* libzpool, always supports all the features. libzfs needs to
* query the running module, via sysfs, to determine which
* features are supported.
*
* The equivalent _can_ be done on FreeBSD by way of the sysctl
* tree, but this has not been done yet. Therefore, we return
* that all features are supported.
*/
#if defined(_KERNEL) || defined(LIB_ZPOOL_BUILD) || defined(__FreeBSD__)
(void) name, (void) sfeatures;
return (B_TRUE);
#else
return (zfs_mod_supported(ZFS_SYSFS_POOL_FEATURES, name, sfeatures));
#endif
}
static void
zfeature_register(spa_feature_t fid, const char *guid, const char *name,
const char *desc, zfeature_flags_t flags, zfeature_type_t type,
const spa_feature_t *deps,
const struct zfs_mod_supported_features *sfeatures)
{
zfeature_info_t *feature = &spa_feature_table[fid];
static const spa_feature_t nodeps[] = { SPA_FEATURE_NONE };
ASSERT(name != NULL);
ASSERT(desc != NULL);
ASSERT((flags & ZFEATURE_FLAG_READONLY_COMPAT) == 0 ||
(flags & ZFEATURE_FLAG_MOS) == 0);
ASSERT3U(fid, <, SPA_FEATURES);
ASSERT(zfeature_is_valid_guid(guid));
if (deps == NULL)
deps = nodeps;
VERIFY(((flags & ZFEATURE_FLAG_PER_DATASET) == 0) ||
(deps_contains_feature(deps, SPA_FEATURE_EXTENSIBLE_DATASET)));
feature->fi_feature = fid;
feature->fi_guid = guid;
feature->fi_uname = name;
feature->fi_desc = desc;
feature->fi_flags = flags;
feature->fi_type = type;
feature->fi_depends = deps;
feature->fi_zfs_mod_supported =
zfs_mod_supported_feature(guid, sfeatures);
}
/*
* Every feature has a GUID of the form com.example:feature_name. The
* reversed DNS name ensures that the feature's GUID is unique across all ZFS
* implementations. This allows companies to independently develop and
* release features. Examples include org.delphix and org.datto. Previously,
* features developed on one implementation have used that implementation's
* domain name (e.g. org.illumos and org.zfsonlinux). Use of the org.openzfs
* domain name is recommended for new features which are developed by the
* OpenZFS community and its platforms. This domain may optionally be used by
* companies developing features for initial release through an OpenZFS
* implementation. Use of the org.openzfs domain requires reserving the
* feature name in advance with the OpenZFS project.
*/
void
zpool_feature_init(void)
{
struct zfs_mod_supported_features *sfeatures =
zfs_mod_list_supported(ZFS_SYSFS_POOL_FEATURES);
zfeature_register(SPA_FEATURE_ASYNC_DESTROY,
"com.delphix:async_destroy", "async_destroy",
"Destroy filesystems asynchronously.",
ZFEATURE_FLAG_READONLY_COMPAT, ZFEATURE_TYPE_BOOLEAN, NULL,
sfeatures);
zfeature_register(SPA_FEATURE_EMPTY_BPOBJ,
"com.delphix:empty_bpobj", "empty_bpobj",
"Snapshots use less space.",
ZFEATURE_FLAG_READONLY_COMPAT, ZFEATURE_TYPE_BOOLEAN, NULL,
sfeatures);
zfeature_register(SPA_FEATURE_LZ4_COMPRESS,
"org.illumos:lz4_compress", "lz4_compress",
"LZ4 compression algorithm support.",
ZFEATURE_FLAG_ACTIVATE_ON_ENABLE, ZFEATURE_TYPE_BOOLEAN, NULL,
sfeatures);
zfeature_register(SPA_FEATURE_MULTI_VDEV_CRASH_DUMP,
"com.joyent:multi_vdev_crash_dump", "multi_vdev_crash_dump",
"Crash dumps to multiple vdev pools.",
0, ZFEATURE_TYPE_BOOLEAN, NULL, sfeatures);
zfeature_register(SPA_FEATURE_SPACEMAP_HISTOGRAM,
"com.delphix:spacemap_histogram", "spacemap_histogram",
"Spacemaps maintain space histograms.",
ZFEATURE_FLAG_READONLY_COMPAT, ZFEATURE_TYPE_BOOLEAN, NULL,
sfeatures);
zfeature_register(SPA_FEATURE_ENABLED_TXG,
"com.delphix:enabled_txg", "enabled_txg",
"Record txg at which a feature is enabled",
ZFEATURE_FLAG_READONLY_COMPAT, ZFEATURE_TYPE_BOOLEAN, NULL,
sfeatures);
{
static const spa_feature_t hole_birth_deps[] = {
SPA_FEATURE_ENABLED_TXG,
SPA_FEATURE_NONE
};
zfeature_register(SPA_FEATURE_HOLE_BIRTH,
"com.delphix:hole_birth", "hole_birth",
"Retain hole birth txg for more precise zfs send",
ZFEATURE_FLAG_MOS | ZFEATURE_FLAG_ACTIVATE_ON_ENABLE,
ZFEATURE_TYPE_BOOLEAN, hole_birth_deps, sfeatures);
}
zfeature_register(SPA_FEATURE_POOL_CHECKPOINT,
"com.delphix:zpool_checkpoint", "zpool_checkpoint",
"Pool state can be checkpointed, allowing rewind later.",
ZFEATURE_FLAG_READONLY_COMPAT, ZFEATURE_TYPE_BOOLEAN, NULL,
sfeatures);
zfeature_register(SPA_FEATURE_SPACEMAP_V2,
"com.delphix:spacemap_v2", "spacemap_v2",
"Space maps representing large segments are more efficient.",
ZFEATURE_FLAG_READONLY_COMPAT | ZFEATURE_FLAG_ACTIVATE_ON_ENABLE,
ZFEATURE_TYPE_BOOLEAN, NULL, sfeatures);
zfeature_register(SPA_FEATURE_EXTENSIBLE_DATASET,
"com.delphix:extensible_dataset", "extensible_dataset",
"Enhanced dataset functionality, used by other features.",
0, ZFEATURE_TYPE_BOOLEAN, NULL, sfeatures);
{
static const spa_feature_t bookmarks_deps[] = {
SPA_FEATURE_EXTENSIBLE_DATASET,
SPA_FEATURE_NONE
};
zfeature_register(SPA_FEATURE_BOOKMARKS,
"com.delphix:bookmarks", "bookmarks",
"\"zfs bookmark\" command",
ZFEATURE_FLAG_READONLY_COMPAT, ZFEATURE_TYPE_BOOLEAN,
bookmarks_deps, sfeatures);
}
{
static const spa_feature_t filesystem_limits_deps[] = {
SPA_FEATURE_EXTENSIBLE_DATASET,
SPA_FEATURE_NONE
};
zfeature_register(SPA_FEATURE_FS_SS_LIMIT,
"com.joyent:filesystem_limits", "filesystem_limits",
"Filesystem and snapshot limits.",
ZFEATURE_FLAG_READONLY_COMPAT, ZFEATURE_TYPE_BOOLEAN,
filesystem_limits_deps, sfeatures);
}
zfeature_register(SPA_FEATURE_EMBEDDED_DATA,
"com.delphix:embedded_data", "embedded_data",
"Blocks which compress very well use even less space.",
ZFEATURE_FLAG_MOS | ZFEATURE_FLAG_ACTIVATE_ON_ENABLE,
ZFEATURE_TYPE_BOOLEAN, NULL, sfeatures);
{
static const spa_feature_t livelist_deps[] = {
SPA_FEATURE_EXTENSIBLE_DATASET,
SPA_FEATURE_NONE
};
zfeature_register(SPA_FEATURE_LIVELIST,
"com.delphix:livelist", "livelist",
"Improved clone deletion performance.",
ZFEATURE_FLAG_READONLY_COMPAT, ZFEATURE_TYPE_BOOLEAN,
livelist_deps, sfeatures);
}
{
static const spa_feature_t log_spacemap_deps[] = {
SPA_FEATURE_SPACEMAP_V2,
SPA_FEATURE_NONE
};
zfeature_register(SPA_FEATURE_LOG_SPACEMAP,
"com.delphix:log_spacemap", "log_spacemap",
"Log metaslab changes on a single spacemap and "
"flush them periodically.",
ZFEATURE_FLAG_READONLY_COMPAT, ZFEATURE_TYPE_BOOLEAN,
log_spacemap_deps, sfeatures);
}
{
static const spa_feature_t large_blocks_deps[] = {
SPA_FEATURE_EXTENSIBLE_DATASET,
SPA_FEATURE_NONE
};
zfeature_register(SPA_FEATURE_LARGE_BLOCKS,
"org.open-zfs:large_blocks", "large_blocks",
"Support for blocks larger than 128KB.",
ZFEATURE_FLAG_PER_DATASET, ZFEATURE_TYPE_BOOLEAN,
large_blocks_deps, sfeatures);
}
{
static const spa_feature_t large_dnode_deps[] = {
SPA_FEATURE_EXTENSIBLE_DATASET,
SPA_FEATURE_NONE
};
zfeature_register(SPA_FEATURE_LARGE_DNODE,
"org.zfsonlinux:large_dnode", "large_dnode",
"Variable on-disk size of dnodes.",
ZFEATURE_FLAG_PER_DATASET, ZFEATURE_TYPE_BOOLEAN,
large_dnode_deps, sfeatures);
}
{
static const spa_feature_t sha512_deps[] = {
SPA_FEATURE_EXTENSIBLE_DATASET,
SPA_FEATURE_NONE
};
zfeature_register(SPA_FEATURE_SHA512,
"org.illumos:sha512", "sha512",
"SHA-512/256 hash algorithm.",
ZFEATURE_FLAG_PER_DATASET, ZFEATURE_TYPE_BOOLEAN,
sha512_deps, sfeatures);
}
{
static const spa_feature_t skein_deps[] = {
SPA_FEATURE_EXTENSIBLE_DATASET,
SPA_FEATURE_NONE
};
zfeature_register(SPA_FEATURE_SKEIN,
"org.illumos:skein", "skein",
"Skein hash algorithm.",
ZFEATURE_FLAG_PER_DATASET, ZFEATURE_TYPE_BOOLEAN,
skein_deps, sfeatures);
}
{
static const spa_feature_t edonr_deps[] = {
SPA_FEATURE_EXTENSIBLE_DATASET,
SPA_FEATURE_NONE
};
zfeature_register(SPA_FEATURE_EDONR,
"org.illumos:edonr", "edonr",
"Edon-R hash algorithm.",
ZFEATURE_FLAG_PER_DATASET, ZFEATURE_TYPE_BOOLEAN,
edonr_deps, sfeatures);
}
{
static const spa_feature_t redact_books_deps[] = {
SPA_FEATURE_BOOKMARK_V2,
SPA_FEATURE_EXTENSIBLE_DATASET,
SPA_FEATURE_BOOKMARKS,
SPA_FEATURE_NONE
};
zfeature_register(SPA_FEATURE_REDACTION_BOOKMARKS,
"com.delphix:redaction_bookmarks", "redaction_bookmarks",
"Support for bookmarks which store redaction lists for zfs "
"redacted send/recv.", 0, ZFEATURE_TYPE_BOOLEAN,
redact_books_deps, sfeatures);
}
{
static const spa_feature_t redact_datasets_deps[] = {
SPA_FEATURE_EXTENSIBLE_DATASET,
SPA_FEATURE_NONE
};
zfeature_register(SPA_FEATURE_REDACTED_DATASETS,
"com.delphix:redacted_datasets", "redacted_datasets",
"Support for redacted datasets, produced by receiving "
"a redacted zfs send stream.",
ZFEATURE_FLAG_PER_DATASET, ZFEATURE_TYPE_UINT64_ARRAY,
redact_datasets_deps, sfeatures);
}
{
static const spa_feature_t bookmark_written_deps[] = {
SPA_FEATURE_BOOKMARK_V2,
SPA_FEATURE_EXTENSIBLE_DATASET,
SPA_FEATURE_BOOKMARKS,
SPA_FEATURE_NONE
};
zfeature_register(SPA_FEATURE_BOOKMARK_WRITTEN,
"com.delphix:bookmark_written", "bookmark_written",
"Additional accounting, enabling the written#<bookmark> "
"property (space written since a bookmark), "
"and estimates of send stream sizes for incrementals from "
"bookmarks.",
0, ZFEATURE_TYPE_BOOLEAN, bookmark_written_deps, sfeatures);
}
zfeature_register(SPA_FEATURE_DEVICE_REMOVAL,
"com.delphix:device_removal", "device_removal",
"Top-level vdevs can be removed, reducing logical pool size.",
ZFEATURE_FLAG_MOS, ZFEATURE_TYPE_BOOLEAN, NULL, sfeatures);
{
static const spa_feature_t obsolete_counts_deps[] = {
SPA_FEATURE_EXTENSIBLE_DATASET,
SPA_FEATURE_DEVICE_REMOVAL,
SPA_FEATURE_NONE
};
zfeature_register(SPA_FEATURE_OBSOLETE_COUNTS,
"com.delphix:obsolete_counts", "obsolete_counts",
"Reduce memory used by removed devices when their blocks "
"are freed or remapped.",
ZFEATURE_FLAG_READONLY_COMPAT, ZFEATURE_TYPE_BOOLEAN,
obsolete_counts_deps, sfeatures);
}
{
static const spa_feature_t userobj_accounting_deps[] = {
SPA_FEATURE_EXTENSIBLE_DATASET,
SPA_FEATURE_NONE
};
zfeature_register(SPA_FEATURE_USEROBJ_ACCOUNTING,
"org.zfsonlinux:userobj_accounting", "userobj_accounting",
"User/Group object accounting.",
ZFEATURE_FLAG_READONLY_COMPAT | ZFEATURE_FLAG_PER_DATASET,
ZFEATURE_TYPE_BOOLEAN, userobj_accounting_deps, sfeatures);
}
{
static const spa_feature_t bookmark_v2_deps[] = {
SPA_FEATURE_EXTENSIBLE_DATASET,
SPA_FEATURE_BOOKMARKS,
SPA_FEATURE_NONE
};
zfeature_register(SPA_FEATURE_BOOKMARK_V2,
"com.datto:bookmark_v2", "bookmark_v2",
"Support for larger bookmarks",
0, ZFEATURE_TYPE_BOOLEAN, bookmark_v2_deps, sfeatures);
}
{
static const spa_feature_t encryption_deps[] = {
SPA_FEATURE_EXTENSIBLE_DATASET,
SPA_FEATURE_BOOKMARK_V2,
SPA_FEATURE_NONE
};
zfeature_register(SPA_FEATURE_ENCRYPTION,
"com.datto:encryption", "encryption",
"Support for dataset level encryption",
ZFEATURE_FLAG_PER_DATASET, ZFEATURE_TYPE_BOOLEAN,
encryption_deps, sfeatures);
}
{
static const spa_feature_t project_quota_deps[] = {
SPA_FEATURE_EXTENSIBLE_DATASET,
SPA_FEATURE_NONE
};
zfeature_register(SPA_FEATURE_PROJECT_QUOTA,
"org.zfsonlinux:project_quota", "project_quota",
"space/object accounting based on project ID.",
ZFEATURE_FLAG_READONLY_COMPAT | ZFEATURE_FLAG_PER_DATASET,
ZFEATURE_TYPE_BOOLEAN, project_quota_deps, sfeatures);
}
zfeature_register(SPA_FEATURE_ALLOCATION_CLASSES,
"org.zfsonlinux:allocation_classes", "allocation_classes",
"Support for separate allocation classes.",
ZFEATURE_FLAG_READONLY_COMPAT, ZFEATURE_TYPE_BOOLEAN, NULL,
sfeatures);
zfeature_register(SPA_FEATURE_RESILVER_DEFER,
"com.datto:resilver_defer", "resilver_defer",
"Support for deferring new resilvers when one is already running.",
ZFEATURE_FLAG_READONLY_COMPAT, ZFEATURE_TYPE_BOOLEAN, NULL,
sfeatures);
zfeature_register(SPA_FEATURE_DEVICE_REBUILD,
"org.openzfs:device_rebuild", "device_rebuild",
"Support for sequential mirror/dRAID device rebuilds",
ZFEATURE_FLAG_READONLY_COMPAT, ZFEATURE_TYPE_BOOLEAN, NULL,
sfeatures);
{
static const spa_feature_t zstd_deps[] = {
SPA_FEATURE_EXTENSIBLE_DATASET,
SPA_FEATURE_NONE
};
zfeature_register(SPA_FEATURE_ZSTD_COMPRESS,
"org.freebsd:zstd_compress", "zstd_compress",
"zstd compression algorithm support.",
ZFEATURE_FLAG_PER_DATASET, ZFEATURE_TYPE_BOOLEAN, zstd_deps,
sfeatures);
}
zfeature_register(SPA_FEATURE_DRAID,
"org.openzfs:draid", "draid", "Support for distributed spare RAID",
ZFEATURE_FLAG_MOS, ZFEATURE_TYPE_BOOLEAN, NULL, sfeatures);
{
static const spa_feature_t zilsaxattr_deps[] = {
SPA_FEATURE_EXTENSIBLE_DATASET,
SPA_FEATURE_NONE
};
zfeature_register(SPA_FEATURE_ZILSAXATTR,
"org.openzfs:zilsaxattr", "zilsaxattr",
"Support for xattr=sa extended attribute logging in ZIL.",
ZFEATURE_FLAG_PER_DATASET | ZFEATURE_FLAG_READONLY_COMPAT,
ZFEATURE_TYPE_BOOLEAN, zilsaxattr_deps, sfeatures);
}
zfs_mod_list_supported_free(sfeatures);
}
#if defined(_KERNEL)
EXPORT_SYMBOL(zfeature_lookup_guid);
EXPORT_SYMBOL(zfeature_lookup_name);
EXPORT_SYMBOL(zfeature_is_supported);
EXPORT_SYMBOL(zfeature_is_valid_guid);
EXPORT_SYMBOL(zfeature_depends_on);
EXPORT_SYMBOL(zpool_feature_init);
EXPORT_SYMBOL(spa_feature_table);
#endif
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