metaslab.h revision 269773 
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) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
23 * Copyright (c) 2011, 2014 by Delphix. All rights reserved.
24 */
25
26#ifndef _SYS_METASLAB_H
27#define	_SYS_METASLAB_H
28
29#include <sys/spa.h>
30#include <sys/space_map.h>
31#include <sys/txg.h>
32#include <sys/zio.h>
33#include <sys/avl.h>
34
35#ifdef	__cplusplus
36extern "C" {
37#endif
38
39typedef struct metaslab_ops {
40	uint64_t (*msop_alloc)(metaslab_t *msp, uint64_t size);
41} metaslab_ops_t;
42
43extern metaslab_ops_t *zfs_metaslab_ops;
44
45metaslab_t *metaslab_init(metaslab_group_t *, uint64_t,
46    uint64_t, uint64_t);
47void metaslab_fini(metaslab_t *);
48
49void metaslab_load_wait(metaslab_t *);
50int metaslab_load(metaslab_t *);
51void metaslab_unload(metaslab_t *);
52
53void metaslab_sync(metaslab_t *, uint64_t);
54void metaslab_sync_done(metaslab_t *, uint64_t);
55void metaslab_sync_reassess(metaslab_group_t *);
56uint64_t metaslab_block_maxsize(metaslab_t *);
57
58#define	METASLAB_HINTBP_FAVOR	0x0
59#define	METASLAB_HINTBP_AVOID	0x1
60#define	METASLAB_GANG_HEADER	0x2
61#define	METASLAB_GANG_CHILD	0x4
62#define	METASLAB_GANG_AVOID	0x8
63
64int metaslab_alloc(spa_t *, metaslab_class_t *, uint64_t,
65    blkptr_t *, int, uint64_t, blkptr_t *, int);
66void metaslab_free(spa_t *, const blkptr_t *, uint64_t, boolean_t);
67int metaslab_claim(spa_t *, const blkptr_t *, uint64_t);
68void metaslab_check_free(spa_t *, const blkptr_t *);
69
70metaslab_class_t *metaslab_class_create(spa_t *, metaslab_ops_t *);
71void metaslab_class_destroy(metaslab_class_t *);
72int metaslab_class_validate(metaslab_class_t *);
73void metaslab_class_histogram_verify(metaslab_class_t *);
74uint64_t metaslab_class_fragmentation(metaslab_class_t *);
75uint64_t metaslab_class_expandable_space(metaslab_class_t *);
76
77void metaslab_class_space_update(metaslab_class_t *, int64_t, int64_t,
78    int64_t, int64_t);
79uint64_t metaslab_class_get_alloc(metaslab_class_t *);
80uint64_t metaslab_class_get_space(metaslab_class_t *);
81uint64_t metaslab_class_get_dspace(metaslab_class_t *);
82uint64_t metaslab_class_get_deferred(metaslab_class_t *);
83uint64_t metaslab_class_get_minblocksize(metaslab_class_t *mc);
84
85metaslab_group_t *metaslab_group_create(metaslab_class_t *, vdev_t *);
86void metaslab_group_destroy(metaslab_group_t *);
87void metaslab_group_activate(metaslab_group_t *);
88void metaslab_group_passivate(metaslab_group_t *);
89uint64_t metaslab_group_get_space(metaslab_group_t *);
90void metaslab_group_histogram_verify(metaslab_group_t *);
91uint64_t metaslab_group_fragmentation(metaslab_group_t *);
92void metaslab_group_histogram_remove(metaslab_group_t *, metaslab_t *);
93
94#ifdef	__cplusplus
95}
96#endif
97
98#endif	/* _SYS_METASLAB_H */
99