zfs/sys/bplist.h

	bplist.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_BPLIST_H
#define _SYS_BPLIST_H

#pragma ident   "%Z%%M% %I% %E% SMI"

#include <sys/dmu.h>
#include <sys/spa.h>
#include <sys/txg.h>
#include <sys/zfs_context.h>

#ifdef  __cplusplus
extern "C" {
#endif

typedef struct bplist_phys {
    /*
     * This is the bonus buffer for the dead lists.  The object's
     * contents is an array of bpl_entries blkptr_t's, representing
     * a total of bpl_bytes physical space.
     */
    uint64_t    bpl_entries;
    uint64_t    bpl_bytes;
} bplist_phys_t;

typedef struct bplist_q {
    blkptr_t    bpq_blk;
    void        *bpq_next;
} bplist_q_t;

typedef struct bplist {
    kmutex_t    bpl_lock;
    objset_t    *bpl_mos;
    uint64_t    bpl_object;
    int     bpl_blockshift;
    int     bpl_bpshift;
    bplist_q_t  *bpl_queue;
    bplist_phys_t   *bpl_phys;
    dmu_buf_t   *bpl_dbuf;
    dmu_buf_t   *bpl_cached_dbuf;
} bplist_t;

extern uint64_t bplist_create(objset_t *mos, int blocksize, dmu_tx_t *tx);
extern void bplist_destroy(objset_t *mos, uint64_t object, dmu_tx_t *tx);
extern void bplist_open(bplist_t *bpl, objset_t *mos, uint64_t object);
extern void bplist_close(bplist_t *bpl);
extern boolean_t bplist_empty(bplist_t *bpl);
extern int bplist_iterate(bplist_t *bpl, uint64_t *itorp, blkptr_t *bp);
extern void bplist_enqueue(bplist_t *bpl, blkptr_t *bp, dmu_tx_t *tx);
extern void bplist_enqueue_deferred(bplist_t *bpl, blkptr_t *bp);
extern void bplist_sync(bplist_t *bpl, dmu_tx_t *tx);
extern void bplist_vacate(bplist_t *bpl, dmu_tx_t *tx);

#ifdef  __cplusplus
}
#endif

#endif /* _SYS_BPLIST_H */