metaslab.h revision 332525 
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, 2016 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
39
40typedef struct metaslab_ops {
41	uint64_t (*msop_alloc)(metaslab_t *, uint64_t);
42} metaslab_ops_t;
43
44
45extern metaslab_ops_t *zfs_metaslab_ops;
46
47int metaslab_init(metaslab_group_t *, uint64_t, uint64_t, uint64_t,
48    metaslab_t **);
49void metaslab_fini(metaslab_t *);
50
51void metaslab_load_wait(metaslab_t *);
52int metaslab_load(metaslab_t *);
53void metaslab_unload(metaslab_t *);
54
55void metaslab_sync(metaslab_t *, uint64_t);
56void metaslab_sync_done(metaslab_t *, uint64_t);
57void metaslab_sync_reassess(metaslab_group_t *);
58uint64_t metaslab_block_maxsize(metaslab_t *);
59
60#define	METASLAB_HINTBP_FAVOR		0x0
61#define	METASLAB_HINTBP_AVOID		0x1
62#define	METASLAB_GANG_HEADER		0x2
63#define	METASLAB_GANG_CHILD		0x4
64#define	METASLAB_ASYNC_ALLOC		0x8
65#define	METASLAB_DONT_THROTTLE		0x10
66
67int metaslab_alloc(spa_t *, metaslab_class_t *, uint64_t,
68    blkptr_t *, int, uint64_t, blkptr_t *, int, zio_alloc_list_t *, zio_t *);
69int metaslab_alloc_dva(spa_t *, metaslab_class_t *, uint64_t,
70    dva_t *, int, dva_t *, uint64_t, int, zio_alloc_list_t *);
71void metaslab_free(spa_t *, const blkptr_t *, uint64_t, boolean_t);
72void metaslab_free_concrete(vdev_t *, uint64_t, uint64_t, uint64_t);
73void metaslab_free_dva(spa_t *, const dva_t *, uint64_t);
74void metaslab_free_impl_cb(uint64_t, vdev_t *, uint64_t, uint64_t, void *);
75void metaslab_unalloc_dva(spa_t *, const dva_t *, uint64_t);
76int metaslab_claim(spa_t *, const blkptr_t *, uint64_t);
77int metaslab_claim_impl(vdev_t *, uint64_t, uint64_t, uint64_t);
78void metaslab_check_free(spa_t *, const blkptr_t *);
79
80void metaslab_alloc_trace_init(void);
81void metaslab_alloc_trace_fini(void);
82void metaslab_trace_init(zio_alloc_list_t *);
83void metaslab_trace_fini(zio_alloc_list_t *);
84
85metaslab_class_t *metaslab_class_create(spa_t *, metaslab_ops_t *);
86void metaslab_class_destroy(metaslab_class_t *);
87int metaslab_class_validate(metaslab_class_t *);
88void metaslab_class_histogram_verify(metaslab_class_t *);
89uint64_t metaslab_class_fragmentation(metaslab_class_t *);
90uint64_t metaslab_class_expandable_space(metaslab_class_t *);
91boolean_t metaslab_class_throttle_reserve(metaslab_class_t *, int,
92    zio_t *, int);
93void metaslab_class_throttle_unreserve(metaslab_class_t *, int, zio_t *);
94
95void metaslab_class_space_update(metaslab_class_t *, int64_t, int64_t,
96    int64_t, int64_t);
97uint64_t metaslab_class_get_alloc(metaslab_class_t *);
98uint64_t metaslab_class_get_space(metaslab_class_t *);
99uint64_t metaslab_class_get_dspace(metaslab_class_t *);
100uint64_t metaslab_class_get_deferred(metaslab_class_t *);
101uint64_t metaslab_class_get_minblocksize(metaslab_class_t *mc);
102
103metaslab_group_t *metaslab_group_create(metaslab_class_t *, vdev_t *);
104void metaslab_group_destroy(metaslab_group_t *);
105void metaslab_group_activate(metaslab_group_t *);
106void metaslab_group_passivate(metaslab_group_t *);
107boolean_t metaslab_group_initialized(metaslab_group_t *);
108uint64_t metaslab_group_get_space(metaslab_group_t *);
109void metaslab_group_histogram_verify(metaslab_group_t *);
110uint64_t metaslab_group_fragmentation(metaslab_group_t *);
111void metaslab_group_histogram_remove(metaslab_group_t *, metaslab_t *);
112void metaslab_group_alloc_decrement(spa_t *, uint64_t, void *, int);
113void metaslab_group_alloc_verify(spa_t *, const blkptr_t *, void *);
114
115#ifdef	__cplusplus
116}
117#endif
118
119#endif	/* _SYS_METASLAB_H */
120