metaslab.h revision 262093 
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) 2013 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	boolean_t (*msop_fragmented)(metaslab_t *msp);
42} metaslab_ops_t;
43
44extern metaslab_ops_t *zfs_metaslab_ops;
45
46metaslab_t *metaslab_init(metaslab_group_t *mg, uint64_t id,
47    uint64_t object, uint64_t txg);
48void metaslab_fini(metaslab_t *msp);
49
50void metaslab_load_wait(metaslab_t *msp);
51int metaslab_load(metaslab_t *msp);
52void metaslab_unload(metaslab_t *msp);
53
54void metaslab_sync(metaslab_t *msp, uint64_t txg);
55void metaslab_sync_done(metaslab_t *msp, uint64_t txg);
56void metaslab_sync_reassess(metaslab_group_t *mg);
57uint64_t metaslab_block_maxsize(metaslab_t *msp);
58
59#define	METASLAB_HINTBP_FAVOR	0x0
60#define	METASLAB_HINTBP_AVOID	0x1
61#define	METASLAB_GANG_HEADER	0x2
62#define	METASLAB_GANG_CHILD	0x4
63#define	METASLAB_GANG_AVOID	0x8
64
65int metaslab_alloc(spa_t *spa, metaslab_class_t *mc, uint64_t psize,
66    blkptr_t *bp, int ncopies, uint64_t txg, blkptr_t *hintbp, int flags);
67void metaslab_free(spa_t *spa, const blkptr_t *bp, uint64_t txg, boolean_t now);
68int metaslab_claim(spa_t *spa, const blkptr_t *bp, uint64_t txg);
69void metaslab_check_free(spa_t *spa, const blkptr_t *bp);
70
71metaslab_class_t *metaslab_class_create(spa_t *spa, metaslab_ops_t *ops);
72void metaslab_class_destroy(metaslab_class_t *mc);
73int metaslab_class_validate(metaslab_class_t *mc);
74
75void metaslab_class_space_update(metaslab_class_t *mc,
76    int64_t alloc_delta, int64_t defer_delta,
77    int64_t space_delta, int64_t dspace_delta);
78uint64_t metaslab_class_get_alloc(metaslab_class_t *mc);
79uint64_t metaslab_class_get_space(metaslab_class_t *mc);
80uint64_t metaslab_class_get_dspace(metaslab_class_t *mc);
81uint64_t metaslab_class_get_deferred(metaslab_class_t *mc);
82uint64_t metaslab_class_get_minblocksize(metaslab_class_t *mc);
83
84metaslab_group_t *metaslab_group_create(metaslab_class_t *mc, vdev_t *vd);
85void metaslab_group_destroy(metaslab_group_t *mg);
86void metaslab_group_activate(metaslab_group_t *mg);
87void metaslab_group_passivate(metaslab_group_t *mg);
88
89#ifdef	__cplusplus
90}
91#endif
92
93#endif	/* _SYS_METASLAB_H */
94