/*

 * 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 2007 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/arc.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;

	arc_buf_t *os_phys_buf;

	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_copies;	/* 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_META_DNODE_OBJECT	0

/* 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,

int dmu_objset_destroy(const char *name);

int dmu_objset_rollback(const char *name);

int dmu_objset_snapshot(char *fsname, char *snapname, boolean_t recursive);

void dmu_objset_stats(objset_t *os, nvlist_t *nv);

void dmu_objset_fast_stat(objset_t *os, dmu_objset_stats_t *stat);

void dmu_objset_space(objset_t *os, uint64_t *refdbytesp, uint64_t *availbytesp,

    uint64_t *usedobjsp, uint64_t *availobjsp);

uint64_t dmu_objset_fsid_guid(objset_t *os);

int dmu_objset_find(char *name, int func(char *, void *), void *arg,

    int flags);

void dmu_objset_byteswap(void *buf, size_t size);

int dmu_objset_evict_dbufs(objset_t *os, int try);

/* called from dsl */

void dmu_objset_sync(objset_impl_t *os, zio_t *zio, dmu_tx_t *tx);

objset_impl_t *dmu_objset_create_impl(spa_t *spa, struct dsl_dataset *ds,

    blkptr_t *bp, dmu_objset_type_t type, dmu_tx_t *tx);

int dmu_objset_open_impl(spa_t *spa, struct dsl_dataset *ds, blkptr_t *bp,

    objset_impl_t **osip);

void dmu_objset_evict(struct dsl_dataset *ds, void *arg);

#ifdef	__cplusplus

}

#endif

#endif /* _SYS_DMU_OBJSET_H */