bpobj.h revision 288559 
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 (c) 2010, Oracle and/or its affiliates. All rights reserved.
23 * Copyright (c) 2012, 2014 by Delphix. All rights reserved.
24 */
25
26#ifndef	_SYS_BPOBJ_H
27#define	_SYS_BPOBJ_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 bpobj_phys {
40	/*
41	 * This is the bonus buffer for the dead lists.  The object's
42	 * contents is an array of bpo_entries blkptr_t's, representing
43	 * a total of bpo_bytes physical space.
44	 */
45	uint64_t	bpo_num_blkptrs;
46	uint64_t	bpo_bytes;
47	uint64_t	bpo_comp;
48	uint64_t	bpo_uncomp;
49	uint64_t	bpo_subobjs;
50	uint64_t	bpo_num_subobjs;
51} bpobj_phys_t;
52
53#define	BPOBJ_SIZE_V0	(2 * sizeof (uint64_t))
54#define	BPOBJ_SIZE_V1	(4 * sizeof (uint64_t))
55
56typedef struct bpobj {
57	kmutex_t	bpo_lock;
58	objset_t	*bpo_os;
59	uint64_t	bpo_object;
60	int		bpo_epb;
61	uint8_t		bpo_havecomp;
62	uint8_t		bpo_havesubobj;
63	bpobj_phys_t	*bpo_phys;
64	dmu_buf_t	*bpo_dbuf;
65	dmu_buf_t	*bpo_cached_dbuf;
66} bpobj_t;
67
68typedef int bpobj_itor_t(void *arg, const blkptr_t *bp, dmu_tx_t *tx);
69
70uint64_t bpobj_alloc(objset_t *mos, int blocksize, dmu_tx_t *tx);
71uint64_t bpobj_alloc_empty(objset_t *os, int blocksize, dmu_tx_t *tx);
72void bpobj_free(objset_t *os, uint64_t obj, dmu_tx_t *tx);
73void bpobj_decr_empty(objset_t *os, dmu_tx_t *tx);
74
75int bpobj_open(bpobj_t *bpo, objset_t *mos, uint64_t object);
76void bpobj_close(bpobj_t *bpo);
77
78int bpobj_iterate(bpobj_t *bpo, bpobj_itor_t func, void *arg, dmu_tx_t *tx);
79int bpobj_iterate_nofree(bpobj_t *bpo, bpobj_itor_t func, void *, dmu_tx_t *);
80
81void bpobj_enqueue_subobj(bpobj_t *bpo, uint64_t subobj, dmu_tx_t *tx);
82void bpobj_enqueue(bpobj_t *bpo, const blkptr_t *bp, dmu_tx_t *tx);
83
84int bpobj_space(bpobj_t *bpo,
85    uint64_t *usedp, uint64_t *compp, uint64_t *uncompp);
86int bpobj_space_range(bpobj_t *bpo, uint64_t mintxg, uint64_t maxtxg,
87    uint64_t *usedp, uint64_t *compp, uint64_t *uncompp);
88
89#ifdef	__cplusplus
90}
91#endif
92
93#endif /* _SYS_BPOBJ_H */
94