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faf0f58c69
Reviewed by: George Wilson <george.wilson@delphix.com>
Reviewed by: Adam Leventhal <ahl@delphix.com>
Reviewed by: Dan McDonald <danmcd@omniti.com>
Approved by: Richard Lowe <richlowe@richlowe.net>
Description from Matt Ahrens's bug report at Delphix:
Add a new zfs property, "redundant_metadata" which can have values
"all" or "most". The default will be "all", which is the current
behavior. Setting to "most" will cause us to only store 1 copy of
level-1 indirect blocks of user data files.
Additional notes:
The new man page section for this property states
"The exact behavior of which metadata blocks
are stored redundantly may change in future releases."
and:
"When set to most, ZFS stores an extra copy of most types of
metadata. This can improve performance of random writes,
because less metadata must be written."
The current implementation is as described above in Matt's blog.
It is controlled by a new global integer
"zfs_redundant_metadata_most_ditto_level", currently initialized
to 2. When "redundant_metadata" is set to "most", only indirect
blocks of the specified level and higher will have additional ditto
blocks created.
Ported by: Tim Chase <tim@chase2k.com>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #2542
179 lines
5.6 KiB
C
179 lines
5.6 KiB
C
/*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License (the "License").
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* You may not use this file except in compliance with the License.
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*
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* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
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* or http://www.opensolaris.org/os/licensing.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
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* If applicable, add the following below this CDDL HEADER, with the
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* fields enclosed by brackets "[]" replaced with your own identifying
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* information: Portions Copyright [yyyy] [name of copyright owner]
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*
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* CDDL HEADER END
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*/
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/*
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* Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
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* Copyright (c) 2013 by Saso Kiselkov. All rights reserved.
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* Copyright (c) 2012, 2014 by Delphix. All rights reserved.
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*/
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/* Portions Copyright 2010 Robert Milkowski */
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#ifndef _SYS_DMU_OBJSET_H
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#define _SYS_DMU_OBJSET_H
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#include <sys/spa.h>
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#include <sys/arc.h>
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#include <sys/txg.h>
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#include <sys/zfs_context.h>
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#include <sys/dnode.h>
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#include <sys/zio.h>
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#include <sys/zil.h>
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#include <sys/sa.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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extern krwlock_t os_lock;
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struct dsl_pool;
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struct dsl_dataset;
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struct dmu_tx;
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#define OBJSET_PHYS_SIZE 2048
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#define OBJSET_OLD_PHYS_SIZE 1024
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#define OBJSET_BUF_HAS_USERUSED(buf) \
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(arc_buf_size(buf) > OBJSET_OLD_PHYS_SIZE)
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#define OBJSET_FLAG_USERACCOUNTING_COMPLETE (1ULL<<0)
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typedef struct objset_phys {
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dnode_phys_t os_meta_dnode;
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zil_header_t os_zil_header;
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uint64_t os_type;
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uint64_t os_flags;
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char os_pad[OBJSET_PHYS_SIZE - sizeof (dnode_phys_t)*3 -
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sizeof (zil_header_t) - sizeof (uint64_t)*2];
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dnode_phys_t os_userused_dnode;
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dnode_phys_t os_groupused_dnode;
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} objset_phys_t;
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struct objset {
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/* Immutable: */
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struct dsl_dataset *os_dsl_dataset;
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spa_t *os_spa;
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arc_buf_t *os_phys_buf;
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objset_phys_t *os_phys;
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/*
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* The following "special" dnodes have no parent and are exempt from
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* dnode_move(), but they root their descendents in this objset using
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* handles anyway, so that all access to dnodes from dbufs consistently
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* uses handles.
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*/
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dnode_handle_t os_meta_dnode;
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dnode_handle_t os_userused_dnode;
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dnode_handle_t os_groupused_dnode;
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zilog_t *os_zil;
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/* can change, under dsl_dir's locks: */
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enum zio_checksum os_checksum;
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enum zio_compress os_compress;
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uint8_t os_copies;
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enum zio_checksum os_dedup_checksum;
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boolean_t os_dedup_verify;
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zfs_logbias_op_t os_logbias;
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zfs_cache_type_t os_primary_cache;
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zfs_cache_type_t os_secondary_cache;
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zfs_sync_type_t os_sync;
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zfs_redundant_metadata_type_t os_redundant_metadata;
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/* no lock needed: */
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struct dmu_tx *os_synctx; /* XXX sketchy */
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blkptr_t *os_rootbp;
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zil_header_t os_zil_header;
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list_t os_synced_dnodes;
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uint64_t os_flags;
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/* Protected by os_obj_lock */
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kmutex_t os_obj_lock;
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uint64_t os_obj_next;
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/* Protected by os_lock */
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kmutex_t os_lock;
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list_t os_dirty_dnodes[TXG_SIZE];
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list_t os_free_dnodes[TXG_SIZE];
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list_t os_dnodes;
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list_t os_downgraded_dbufs;
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/* stuff we store for the user */
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kmutex_t os_user_ptr_lock;
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void *os_user_ptr;
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sa_os_t *os_sa;
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};
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#define DMU_META_OBJSET 0
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#define DMU_META_DNODE_OBJECT 0
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#define DMU_OBJECT_IS_SPECIAL(obj) ((int64_t)(obj) <= 0)
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#define DMU_META_DNODE(os) ((os)->os_meta_dnode.dnh_dnode)
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#define DMU_USERUSED_DNODE(os) ((os)->os_userused_dnode.dnh_dnode)
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#define DMU_GROUPUSED_DNODE(os) ((os)->os_groupused_dnode.dnh_dnode)
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#define DMU_OS_IS_L2CACHEABLE(os) \
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((os)->os_secondary_cache == ZFS_CACHE_ALL || \
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(os)->os_secondary_cache == ZFS_CACHE_METADATA)
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#define DMU_OS_IS_L2COMPRESSIBLE(os) (zfs_mdcomp_disable == B_FALSE)
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/* called from zpl */
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int dmu_objset_hold(const char *name, void *tag, objset_t **osp);
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int dmu_objset_own(const char *name, dmu_objset_type_t type,
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boolean_t readonly, void *tag, objset_t **osp);
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void dmu_objset_refresh_ownership(objset_t *os, void *tag);
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void dmu_objset_rele(objset_t *os, void *tag);
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void dmu_objset_disown(objset_t *os, void *tag);
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int dmu_objset_from_ds(struct dsl_dataset *ds, objset_t **osp);
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void dmu_objset_stats(objset_t *os, nvlist_t *nv);
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void dmu_objset_fast_stat(objset_t *os, dmu_objset_stats_t *stat);
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void dmu_objset_space(objset_t *os, uint64_t *refdbytesp, uint64_t *availbytesp,
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uint64_t *usedobjsp, uint64_t *availobjsp);
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uint64_t dmu_objset_fsid_guid(objset_t *os);
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int dmu_objset_find_dp(struct dsl_pool *dp, uint64_t ddobj,
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int func(struct dsl_pool *, struct dsl_dataset *, void *),
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void *arg, int flags);
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void dmu_objset_evict_dbufs(objset_t *os);
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timestruc_t dmu_objset_snap_cmtime(objset_t *os);
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/* called from dsl */
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void dmu_objset_sync(objset_t *os, zio_t *zio, dmu_tx_t *tx);
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boolean_t dmu_objset_is_dirty(objset_t *os, uint64_t txg);
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objset_t *dmu_objset_create_impl(spa_t *spa, struct dsl_dataset *ds,
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blkptr_t *bp, dmu_objset_type_t type, dmu_tx_t *tx);
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int dmu_objset_open_impl(spa_t *spa, struct dsl_dataset *ds, blkptr_t *bp,
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objset_t **osp);
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void dmu_objset_evict(objset_t *os);
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void dmu_objset_do_userquota_updates(objset_t *os, dmu_tx_t *tx);
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void dmu_objset_userquota_get_ids(dnode_t *dn, boolean_t before, dmu_tx_t *tx);
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boolean_t dmu_objset_userused_enabled(objset_t *os);
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int dmu_objset_userspace_upgrade(objset_t *os);
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boolean_t dmu_objset_userspace_present(objset_t *os);
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int dmu_fsname(const char *snapname, char *buf);
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void dmu_objset_init(void);
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void dmu_objset_fini(void);
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#ifdef __cplusplus
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}
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#endif
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#endif /* _SYS_DMU_OBJSET_H */
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