bplist.h revision 1.1.1.1 
1/*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21/*
22 * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
23 * Use is subject to license terms.
24 */
25
26#ifndef	_SYS_BPLIST_H
27#define	_SYS_BPLIST_H
28
29#include <sys/dmu.h>
30#include <sys/spa.h>
31#include <sys/txg.h>
32#include <sys/zfs_context.h>
33
34#ifdef	__cplusplus
35extern "C" {
36#endif
37
38typedef struct bplist_phys {
39	/*
40	 * This is the bonus buffer for the dead lists.  The object's
41	 * contents is an array of bpl_entries blkptr_t's, representing
42	 * a total of bpl_bytes physical space.
43	 */
44	uint64_t	bpl_entries;
45	uint64_t	bpl_bytes;
46	uint64_t	bpl_comp;
47	uint64_t	bpl_uncomp;
48} bplist_phys_t;
49
50#define	BPLIST_SIZE_V0	(2 * sizeof (uint64_t))
51
52typedef struct bplist_q {
53	blkptr_t	bpq_blk;
54	void		*bpq_next;
55} bplist_q_t;
56
57typedef struct bplist {
58	kmutex_t	bpl_lock;
59	objset_t	*bpl_mos;
60	uint64_t	bpl_object;
61	uint8_t		bpl_blockshift;
62	uint8_t		bpl_bpshift;
63	uint8_t		bpl_havecomp;
64	bplist_q_t	*bpl_queue;
65	bplist_phys_t	*bpl_phys;
66	dmu_buf_t	*bpl_dbuf;
67	dmu_buf_t	*bpl_cached_dbuf;
68} bplist_t;
69
70extern uint64_t bplist_create(objset_t *mos, int blocksize, dmu_tx_t *tx);
71extern void bplist_destroy(objset_t *mos, uint64_t object, dmu_tx_t *tx);
72extern int bplist_open(bplist_t *bpl, objset_t *mos, uint64_t object);
73extern void bplist_close(bplist_t *bpl);
74extern boolean_t bplist_empty(bplist_t *bpl);
75extern int bplist_iterate(bplist_t *bpl, uint64_t *itorp, blkptr_t *bp);
76extern int bplist_enqueue(bplist_t *bpl, const blkptr_t *bp, dmu_tx_t *tx);
77extern void bplist_enqueue_deferred(bplist_t *bpl, const blkptr_t *bp);
78extern void bplist_sync(bplist_t *bpl, dmu_tx_t *tx);
79extern void bplist_vacate(bplist_t *bpl, dmu_tx_t *tx);
80extern int bplist_space(bplist_t *bpl,
81    uint64_t *usedp, uint64_t *compp, uint64_t *uncompp);
82extern int bplist_space_birthrange(bplist_t *bpl,
83    uint64_t mintxg, uint64_t maxtxg, uint64_t *dasizep);
84
85#ifdef	__cplusplus
86}
87#endif
88
89#endif /* _SYS_BPLIST_H */
90