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) 2011, 2015 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);
43 extern metaslab_ops_t *zfs_metaslab_ops;
45 int metaslab_init(metaslab_group_t *, uint64_t, uint64_t, uint64_t,
47 void metaslab_fini(metaslab_t *);
49 void metaslab_load_wait(metaslab_t *);
50 int metaslab_load(metaslab_t *);
51 void metaslab_unload(metaslab_t *);
53 void metaslab_sync(metaslab_t *, uint64_t);
54 void metaslab_sync_done(metaslab_t *, uint64_t);
55 void metaslab_sync_reassess(metaslab_group_t *);
56 uint64_t metaslab_block_maxsize(metaslab_t *);
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
65 int metaslab_alloc(spa_t *, metaslab_class_t *, uint64_t,
66 blkptr_t *, int, uint64_t, blkptr_t *, int, zio_t *);
67 void metaslab_free(spa_t *, const blkptr_t *, uint64_t, boolean_t);
68 int metaslab_claim(spa_t *, const blkptr_t *, uint64_t);
69 void metaslab_check_free(spa_t *, const blkptr_t *);
71 metaslab_class_t *metaslab_class_create(spa_t *, metaslab_ops_t *);
72 void metaslab_class_destroy(metaslab_class_t *);
73 int metaslab_class_validate(metaslab_class_t *);
74 void metaslab_class_histogram_verify(metaslab_class_t *);
75 uint64_t metaslab_class_fragmentation(metaslab_class_t *);
76 uint64_t metaslab_class_expandable_space(metaslab_class_t *);
77 boolean_t metaslab_class_throttle_reserve(metaslab_class_t *, int,
79 void metaslab_class_throttle_unreserve(metaslab_class_t *, int, zio_t *);
81 void metaslab_class_space_update(metaslab_class_t *, int64_t, int64_t,
83 uint64_t metaslab_class_get_alloc(metaslab_class_t *);
84 uint64_t metaslab_class_get_space(metaslab_class_t *);
85 uint64_t metaslab_class_get_dspace(metaslab_class_t *);
86 uint64_t metaslab_class_get_deferred(metaslab_class_t *);
87 uint64_t metaslab_class_get_minblocksize(metaslab_class_t *mc);
89 metaslab_group_t *metaslab_group_create(metaslab_class_t *, vdev_t *);
90 void metaslab_group_destroy(metaslab_group_t *);
91 void metaslab_group_activate(metaslab_group_t *);
92 void metaslab_group_passivate(metaslab_group_t *);
93 boolean_t metaslab_group_initialized(metaslab_group_t *);
94 uint64_t metaslab_group_get_space(metaslab_group_t *);
95 void metaslab_group_histogram_verify(metaslab_group_t *);
96 uint64_t metaslab_group_fragmentation(metaslab_group_t *);
97 void metaslab_group_histogram_remove(metaslab_group_t *, metaslab_t *);
98 void metaslab_group_alloc_decrement(spa_t *, uint64_t, void *, int);
99 void metaslab_group_alloc_verify(spa_t *, const blkptr_t *, void *);
105 #endif /* _SYS_METASLAB_H */