dmu_objset.h revision fa9e4066f08beec538e775443c5be79dd423fcab
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (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 2005 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#ifndef _SYS_DMU_OBJSET_H
#define _SYS_DMU_OBJSET_H
#pragma ident "%Z%%M% %I% %E% SMI"
#include <sys/spa.h>
#include <sys/txg.h>
#include <sys/zfs_context.h>
#include <sys/dnode.h>
#include <sys/zio.h>
#include <sys/zil.h>
#ifdef __cplusplus
extern "C" {
#endif
struct dsl_dataset;
struct dmu_tx;
struct objset_impl;
typedef struct objset_phys {
dnode_phys_t os_meta_dnode;
zil_header_t os_zil_header;
uint64_t os_type;
char os_pad[1024 - sizeof (dnode_phys_t) - sizeof (zil_header_t) -
sizeof (uint64_t)];
} objset_phys_t;
struct objset {
struct objset_impl *os;
int os_mode;
};
typedef struct objset_impl {
/* Immutable: */
struct dsl_dataset *os_dsl_dataset;
spa_t *os_spa;
objset_phys_t *os_phys;
dnode_t *os_meta_dnode;
zilog_t *os_zil;
objset_t os;
uint8_t os_checksum; /* can change, under dsl_dir's locks */
uint8_t os_compress; /* can change, under dsl_dir's locks */
uint8_t os_md_checksum;
uint8_t os_md_compress;
/* no lock needed: */
struct dmu_tx *os_synctx; /* XXX sketchy */
blkptr_t os_rootbp;
/* Protected by os_obj_lock */
kmutex_t os_obj_lock;
uint64_t os_obj_next;
/* Protected by os_lock */
kmutex_t os_lock;
list_t os_dirty_dnodes[TXG_SIZE];
list_t os_free_dnodes[TXG_SIZE];
list_t os_dnodes;
list_t os_downgraded_dbufs;
} objset_impl_t;
#define DMU_PRIVATE_OBJECT (1ULL << 63)
#define DMU_META_DNODE_OBJECT (1ULL << 63)
/* XXX rename this to DMU_IS_DNODE_OBJECT? */
#define IS_DNODE_DNODE(object) ((object) == DMU_META_DNODE_OBJECT)
/* called from zpl */
int dmu_objset_open(const char *name, dmu_objset_type_t type, int mode,
objset_t **osp);
void dmu_objset_close(objset_t *os);
int dmu_objset_create(const char *name, dmu_objset_type_t type,
objset_t *clone_parent,
void (*func)(objset_t *os, void *arg, dmu_tx_t *tx), void *arg);
int dmu_objset_destroy(const char *name);
int dmu_objset_rollback(const char *name);
void dmu_objset_stats(objset_t *os, dmu_objset_stats_t *dds);
void dmu_objset_find(char *name, void func(char *, void *), void *arg,
int flags);
void dmu_objset_byteswap(void *buf, size_t size);
/* called from dsl */
void dmu_objset_sync(objset_impl_t *os, dmu_tx_t *tx);
objset_impl_t *dmu_objset_create_impl(spa_t *spa, struct dsl_dataset *ds,
dmu_objset_type_t type, dmu_tx_t *tx);
objset_impl_t *dmu_objset_open_impl(spa_t *spa, struct dsl_dataset *ds,
blkptr_t *bp);
void dmu_objset_evict(struct dsl_dataset *ds, void *arg);
#ifdef __cplusplus
}
#endif
#endif /* _SYS_DMU_OBJSET_H */