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.
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.
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]
22 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
23 * Copyright (c) 2013 by Delphix. All rights reserved.
26 #ifndef _SYS_METASLAB_H
27 #define _SYS_METASLAB_H
30 #include <sys/space_map.h>
39 typedef struct metaslab_ops {
40 uint64_t (*msop_alloc)(metaslab_t *msp, uint64_t size);
41 boolean_t (*msop_fragmented)(metaslab_t *msp);
44 extern metaslab_ops_t *zfs_metaslab_ops;
46 metaslab_t *metaslab_init(metaslab_group_t *mg, uint64_t id,
47 uint64_t object, uint64_t txg);
48 void metaslab_fini(metaslab_t *msp);
50 void metaslab_load_wait(metaslab_t *msp);
51 int metaslab_load(metaslab_t *msp);
52 void metaslab_unload(metaslab_t *msp);
54 void metaslab_sync(metaslab_t *msp, uint64_t txg);
55 void metaslab_sync_done(metaslab_t *msp, uint64_t txg);
56 void metaslab_sync_reassess(metaslab_group_t *mg);
57 uint64_t metaslab_block_maxsize(metaslab_t *msp);
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
65 int 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);
67 void metaslab_free(spa_t *spa, const blkptr_t *bp, uint64_t txg, boolean_t now);
68 int metaslab_claim(spa_t *spa, const blkptr_t *bp, uint64_t txg);
69 void metaslab_check_free(spa_t *spa, const blkptr_t *bp);
71 metaslab_class_t *metaslab_class_create(spa_t *spa, metaslab_ops_t *ops);
72 void metaslab_class_destroy(metaslab_class_t *mc);
73 int metaslab_class_validate(metaslab_class_t *mc);
75 void 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);
78 uint64_t metaslab_class_get_alloc(metaslab_class_t *mc);
79 uint64_t metaslab_class_get_space(metaslab_class_t *mc);
80 uint64_t metaslab_class_get_dspace(metaslab_class_t *mc);
81 uint64_t metaslab_class_get_deferred(metaslab_class_t *mc);
82 uint64_t metaslab_class_get_minblocksize(metaslab_class_t *mc);
84 metaslab_group_t *metaslab_group_create(metaslab_class_t *mc, vdev_t *vd);
85 void metaslab_group_destroy(metaslab_group_t *mg);
86 void metaslab_group_activate(metaslab_group_t *mg);
87 void metaslab_group_passivate(metaslab_group_t *mg);
93 #endif /* _SYS_METASLAB_H */