metaslab.h revision 307279 
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, 2015 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
45int metaslab_init(metaslab_group_t *, uint64_t, uint64_t, uint64_t,
46    metaslab_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_ASYNC_ALLOC		0x8
63#define	METASLAB_DONT_THROTTLE		0x10
64
65int metaslab_alloc(spa_t *, metaslab_class_t *, uint64_t,
66    blkptr_t *, int, uint64_t, blkptr_t *, int, zio_t *);
67void metaslab_free(spa_t *, const blkptr_t *, uint64_t, boolean_t);
68int metaslab_claim(spa_t *, const blkptr_t *, uint64_t);
69void metaslab_check_free(spa_t *, const blkptr_t *);
70
71metaslab_class_t *metaslab_class_create(spa_t *, metaslab_ops_t *);
72void metaslab_class_destroy(metaslab_class_t *);
73int metaslab_class_validate(metaslab_class_t *);
74void metaslab_class_histogram_verify(metaslab_class_t *);
75uint64_t metaslab_class_fragmentation(metaslab_class_t *);
76uint64_t metaslab_class_expandable_space(metaslab_class_t *);
77boolean_t metaslab_class_throttle_reserve(metaslab_class_t *, int,
78    zio_t *, int);
79void metaslab_class_throttle_unreserve(metaslab_class_t *, int, zio_t *);
80
81void metaslab_class_space_update(metaslab_class_t *, int64_t, int64_t,
82    int64_t, int64_t);
83uint64_t metaslab_class_get_alloc(metaslab_class_t *);
84uint64_t metaslab_class_get_space(metaslab_class_t *);
85uint64_t metaslab_class_get_dspace(metaslab_class_t *);
86uint64_t metaslab_class_get_deferred(metaslab_class_t *);
87uint64_t metaslab_class_get_minblocksize(metaslab_class_t *mc);
88
89metaslab_group_t *metaslab_group_create(metaslab_class_t *, vdev_t *);
90void metaslab_group_destroy(metaslab_group_t *);
91void metaslab_group_activate(metaslab_group_t *);
92void metaslab_group_passivate(metaslab_group_t *);
93boolean_t metaslab_group_initialized(metaslab_group_t *);
94uint64_t metaslab_group_get_space(metaslab_group_t *);
95void metaslab_group_histogram_verify(metaslab_group_t *);
96uint64_t metaslab_group_fragmentation(metaslab_group_t *);
97void metaslab_group_histogram_remove(metaslab_group_t *, metaslab_t *);
98void metaslab_group_alloc_decrement(spa_t *, uint64_t, void *, int);
99void metaslab_group_alloc_verify(spa_t *, const blkptr_t *, void *);
100
101#ifdef	__cplusplus
102}
103#endif
104
105#endif	/* _SYS_METASLAB_H */
106