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 2015 Nexenta Systems, Inc. All rights reserved.
24 * Copyright (c) 2011, 2016 by Delphix. All rights reserved.
25 */
26
27 #ifndef _SYS_METASLAB_H
28 #define _SYS_METASLAB_H
29
30 #include <sys/spa.h>
31 #include <sys/space_map.h>
32 #include <sys/txg.h>
33 #include <sys/zio.h>
34 #include <sys/avl.h>
35
36 #ifdef __cplusplus
37 extern "C" {
38 #endif
39
40
41 typedef struct metaslab_ops {
42 uint64_t (*msop_alloc)(metaslab_t *, uint64_t);
43 } metaslab_ops_t;
44
45
46 extern metaslab_ops_t *zfs_metaslab_ops;
47
48 int metaslab_init(metaslab_group_t *, uint64_t, uint64_t, uint64_t,
49 metaslab_t **);
50 void metaslab_fini(metaslab_t *);
51
52 void metaslab_load_wait(metaslab_t *);
53 int metaslab_load(metaslab_t *);
54 void metaslab_unload(metaslab_t *);
55
56 void metaslab_sync(metaslab_t *, uint64_t);
57 void metaslab_sync_done(metaslab_t *, uint64_t);
58 void metaslab_sync_reassess(metaslab_group_t *);
59 uint64_t metaslab_block_maxsize(metaslab_t *);
60 void metaslab_auto_trim(metaslab_t *, uint64_t);
61
62 #define METASLAB_HINTBP_FAVOR 0x00
63 #define METASLAB_HINTBP_AVOID 0x01
64 #define METASLAB_GANG_HEADER 0x02
65 #define METASLAB_GANG_CHILD 0x04
66 #define METASLAB_ASYNC_ALLOC 0x08
67 #define METASLAB_DONT_THROTTLE 0x10
68 #define METASLAB_USE_WEIGHT_SECONDARY 0x20
69
70 int metaslab_alloc(spa_t *, metaslab_class_t *, uint64_t,
71 blkptr_t *, int, uint64_t, blkptr_t *, int, zio_alloc_list_t *, zio_t *);
72 void metaslab_free(spa_t *, const blkptr_t *, uint64_t, boolean_t);
73 void metaslab_free_dva(spa_t *, const dva_t *, uint64_t, boolean_t);
74 int metaslab_claim(spa_t *, const blkptr_t *, uint64_t);
75 void metaslab_check_free(spa_t *, const blkptr_t *);
76 zio_t *metaslab_trim_all(metaslab_t *, uint64_t *);
77
78 void metaslab_alloc_trace_init(void);
79 void metaslab_alloc_trace_fini(void);
80 void metaslab_trace_init(zio_alloc_list_t *);
81 void metaslab_trace_fini(zio_alloc_list_t *);
82
83 metaslab_class_t *metaslab_class_create(spa_t *, metaslab_ops_t *);
84 void metaslab_class_destroy(metaslab_class_t *);
85 int metaslab_class_validate(metaslab_class_t *);
86 void metaslab_class_histogram_verify(metaslab_class_t *);
87 uint64_t metaslab_class_fragmentation(metaslab_class_t *);
88 uint64_t metaslab_class_expandable_space(metaslab_class_t *);
89 boolean_t metaslab_class_throttle_reserve(metaslab_class_t *, int,
90 zio_t *, int);
91 void metaslab_class_throttle_unreserve(metaslab_class_t *, int, zio_t *);
92
93 void metaslab_class_space_update(metaslab_class_t *, int64_t, int64_t,
94 int64_t, int64_t);
95 uint64_t metaslab_class_get_alloc(metaslab_class_t *);
96 uint64_t metaslab_class_get_space(metaslab_class_t *);
97 uint64_t metaslab_class_get_dspace(metaslab_class_t *);
98 uint64_t metaslab_class_get_deferred(metaslab_class_t *);
99
100 metaslab_group_t *metaslab_group_create(metaslab_class_t *, vdev_t *);
101 void metaslab_group_destroy(metaslab_group_t *);
102 void metaslab_group_activate(metaslab_group_t *);
103 void metaslab_group_passivate(metaslab_group_t *);
104 boolean_t metaslab_group_initialized(metaslab_group_t *);
105 uint64_t metaslab_group_get_space(metaslab_group_t *);
106 void metaslab_group_histogram_verify(metaslab_group_t *);
107 uint64_t metaslab_group_fragmentation(metaslab_group_t *);
108 void metaslab_group_histogram_remove(metaslab_group_t *, metaslab_t *);
109 void metaslab_group_alloc_decrement(spa_t *, uint64_t, void *, int);
110 void metaslab_group_alloc_verify(spa_t *, const blkptr_t *, void *);
111
112 void metaslab_trimstats_create(spa_t *spa);
113 void metaslab_trimstats_destroy(spa_t *spa);
114
115 #ifdef __cplusplus
116 }
117 #endif
118
119 #endif /* _SYS_METASLAB_H */