/*

 * 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) 2005, 2010, Oracle and/or its affiliates. All rights reserved.

 */

#ifndef	_SYS_DMU_TRAVERSE_H

#define	_SYS_DMU_TRAVERSE_H

#include <sys/zfs_context.h>

#include <sys/spa.h>

#include <sys/zio.h>

#ifdef	__cplusplus

extern "C" {

#endif

struct dnode_phys;

struct dsl_dataset;

struct zilog;

struct arc_buf;

typedef int (blkptr_cb_t)(spa_t *spa, zilog_t *zilog, const blkptr_t *bp,

    struct arc_buf *pbuf, const zbookmark_t *zb, const struct dnode_phys *dnp,

    void *arg);

#define	TRAVERSE_PRE			(1<<0)

#define	TRAVERSE_POST			(1<<1)

#define	TRAVERSE_PREFETCH_METADATA	(1<<2)

#define	TRAVERSE_PREFETCH_DATA		(1<<3)

#define	TRAVERSE_PREFETCH (TRAVERSE_PREFETCH_METADATA | TRAVERSE_PREFETCH_DATA)

#define	TRAVERSE_HARD			(1<<4)

/* Special traverse error return value to indicate skipping of children */

#define	TRAVERSE_VISIT_NO_CHILDREN	-1

int traverse_dataset(struct dsl_dataset *ds,

    uint64_t txg_start, int flags, blkptr_cb_t func, void *arg);

int traverse_pool(spa_t *spa,

    uint64_t txg_start, int flags, blkptr_cb_t func, void *arg);

#ifdef	__cplusplus

}

#endif

#endif /* _SYS_DMU_TRAVERSE_H */