210 lines
6.6 KiB
C
210 lines
6.6 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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* Copyright (c) 2014 Spectra Logic Corporation, 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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#define OBJSET_FLAG_USEROBJACCOUNTING_COMPLETE (1ULL<<1)
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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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typedef int (*dmu_objset_upgrade_cb_t)(objset_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, are exempt
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* from dnode_move(), and are not recorded in os_dnodes, but they
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* root their descendents in this objset using handles anyway, so
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* that all access to dnodes from dbufs consistently 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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list_node_t os_evicting_node;
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/* can change, under dsl_dir's locks: */
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uint64_t os_dnodesize; /* default dnode size for new objects */
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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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int os_recordsize;
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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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uint64_t os_freed_dnodes;
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boolean_t os_rescan_dnodes;
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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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/* kernel thread to upgrade this dataset */
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kmutex_t os_upgrade_lock;
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taskqid_t os_upgrade_id;
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dmu_objset_upgrade_cb_t os_upgrade_cb;
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boolean_t os_upgrade_exit;
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int os_upgrade_status;
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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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/* 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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int dmu_objset_own_obj(struct dsl_pool *dp, uint64_t obj,
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dmu_objset_type_t type, 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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boolean_t dmu_objset_userobjused_enabled(objset_t *os);
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void dmu_objset_userobjspace_upgrade(objset_t *os);
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boolean_t dmu_objset_userobjspace_present(objset_t *os);
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static inline boolean_t dmu_objset_userobjspace_upgradable(objset_t *os)
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{
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return (dmu_objset_type(os) == DMU_OST_ZFS &&
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!dmu_objset_is_snapshot(os) &&
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dmu_objset_userobjused_enabled(os) &&
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!dmu_objset_userobjspace_present(os));
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}
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int dmu_fsname(const char *snapname, char *buf);
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void dmu_objset_evict_done(objset_t *os);
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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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