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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 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
36 extern "C" {
37 #endif
38
39 extern space_map_ops_t *zfs_metaslab_ops;
40
41 extern metaslab_t *metaslab_init(metaslab_group_t *mg, space_map_obj_t *smo,
42 uint64_t start, uint64_t size, uint64_t txg);
43 extern void metaslab_fini(metaslab_t *msp);
44 extern void metaslab_sync(metaslab_t *msp, uint64_t txg);
45 extern void metaslab_sync_done(metaslab_t *msp, uint64_t txg);
46 extern void metaslab_sync_reassess(metaslab_group_t *mg);
47
48 #define METASLAB_HINTBP_FAVOR 0x0
49 #define METASLAB_HINTBP_AVOID 0x1
50 #define METASLAB_GANG_HEADER 0x2
51 #define METASLAB_GANG_CHILD 0x4
52 #define METASLAB_GANG_AVOID 0x8
53
54 extern int metaslab_alloc(spa_t *spa, metaslab_class_t *mc, uint64_t psize,
55 blkptr_t *bp, int ncopies, uint64_t txg, blkptr_t *hintbp, int flags);
56 extern void metaslab_free(spa_t *spa, const blkptr_t *bp, uint64_t txg,
57 boolean_t now);
58 extern int metaslab_claim(spa_t *spa, const blkptr_t *bp, uint64_t txg);
59
60 extern metaslab_class_t *metaslab_class_create(spa_t *spa,
61 space_map_ops_t *ops);
62 extern void metaslab_class_destroy(metaslab_class_t *mc);
63 extern int metaslab_class_validate(metaslab_class_t *mc);
64
65 extern void metaslab_class_space_update(metaslab_class_t *mc,
66 int64_t alloc_delta, int64_t defer_delta,
67 int64_t space_delta, int64_t dspace_delta);
68 extern uint64_t metaslab_class_get_alloc(metaslab_class_t *mc);
69 extern uint64_t metaslab_class_get_space(metaslab_class_t *mc);
70 extern uint64_t metaslab_class_get_dspace(metaslab_class_t *mc);
71 extern uint64_t metaslab_class_get_deferred(metaslab_class_t *mc);
72
73 extern metaslab_group_t *metaslab_group_create(metaslab_class_t *mc,
74 vdev_t *vd);
75 extern void metaslab_group_destroy(metaslab_group_t *mg);
76 extern void metaslab_group_activate(metaslab_group_t *mg);
77 extern void metaslab_group_passivate(metaslab_group_t *mg);
78
79 #ifdef __cplusplus
80 }
81 #endif
82
83 #endif /* _SYS_METASLAB_H */