bplist.h revision 1.1.1.2 
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 2009 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/zio.h>
33#include <sys/zfs_context.h>
34
35#ifdef	__cplusplus
36extern "C" {
37#endif
38
39typedef struct bplist_phys {
40	/*
41	 * This is the bonus buffer for the dead lists.  The object's
42	 * contents is an array of bpl_entries blkptr_t's, representing
43	 * a total of bpl_bytes physical space.
44	 */
45	uint64_t	bpl_entries;
46	uint64_t	bpl_bytes;
47	uint64_t	bpl_comp;
48	uint64_t	bpl_uncomp;
49} bplist_phys_t;
50
51#define	BPLIST_SIZE_V0	(2 * sizeof (uint64_t))
52
53typedef struct bplist_q {
54	blkptr_t	bpq_blk;
55	void		*bpq_next;
56} bplist_q_t;
57
58typedef struct bplist {
59	kmutex_t	bpl_lock;
60	objset_t	*bpl_mos;
61	uint64_t	bpl_object;
62	uint8_t		bpl_blockshift;
63	uint8_t		bpl_bpshift;
64	uint8_t		bpl_havecomp;
65	bplist_q_t	*bpl_queue;
66	bplist_phys_t	*bpl_phys;
67	dmu_buf_t	*bpl_dbuf;
68	dmu_buf_t	*bpl_cached_dbuf;
69} bplist_t;
70
71typedef void bplist_sync_cb_t(void *arg, const blkptr_t *bp, dmu_tx_t *tx);
72
73extern void bplist_init(bplist_t *bpl);
74extern void bplist_fini(bplist_t *bpl);
75extern uint64_t bplist_create(objset_t *mos, int blocksize, dmu_tx_t *tx);
76extern void bplist_destroy(objset_t *mos, uint64_t object, dmu_tx_t *tx);
77extern int bplist_open(bplist_t *bpl, objset_t *mos, uint64_t object);
78extern void bplist_close(bplist_t *bpl);
79extern boolean_t bplist_empty(bplist_t *bpl);
80extern int bplist_iterate(bplist_t *bpl, uint64_t *itorp, blkptr_t *bp);
81extern int bplist_enqueue(bplist_t *bpl, const blkptr_t *bp, dmu_tx_t *tx);
82extern void bplist_enqueue_cb(void *bpl, const blkptr_t *bp, dmu_tx_t *tx);
83extern void bplist_enqueue_deferred(bplist_t *bpl, const blkptr_t *bp);
84extern void bplist_sync(bplist_t *bpl, bplist_sync_cb_t *func,
85    void *arg, dmu_tx_t *tx);
86extern void bplist_vacate(bplist_t *bpl, dmu_tx_t *tx);
87extern int bplist_space(bplist_t *bpl,
88    uint64_t *usedp, uint64_t *compp, uint64_t *uncompp);
89extern int bplist_space_birthrange(bplist_t *bpl,
90    uint64_t mintxg, uint64_t maxtxg, uint64_t *dsizep);
91
92#ifdef	__cplusplus
93}
94#endif
95
96#endif /* _SYS_BPLIST_H */
97