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, 2018 by Delphix. All rights reserved.
24 * Copyright (c) 2017, Intel Corporation.
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 int metaslab_load(metaslab_t *);
53 void metaslab_unload(metaslab_t *);
54
55 uint64_t metaslab_allocated_space(metaslab_t *);
56
57 void metaslab_sync(metaslab_t *, uint64_t);
58 void metaslab_sync_done(metaslab_t *, uint64_t);
59 void metaslab_sync_reassess(metaslab_group_t *);
60 uint64_t metaslab_block_maxsize(metaslab_t *);
61
62 /*
63 * metaslab alloc flags
64 */
65 #define METASLAB_HINTBP_FAVOR 0x0
66 #define METASLAB_HINTBP_AVOID 0x1
67 #define METASLAB_GANG_HEADER 0x2
68 #define METASLAB_GANG_CHILD 0x4
69 #define METASLAB_ASYNC_ALLOC 0x8
70 #define METASLAB_DONT_THROTTLE 0x10
71 #define METASLAB_MUST_RESERVE 0x20
72 #define METASLAB_FASTWRITE 0x40
73
74 int metaslab_alloc(spa_t *, metaslab_class_t *, uint64_t,
75 blkptr_t *, int, uint64_t, blkptr_t *, int, zio_alloc_list_t *, zio_t *,
76 int);
77 int metaslab_alloc_dva(spa_t *, metaslab_class_t *, uint64_t,
78 dva_t *, int, dva_t *, uint64_t, int, zio_alloc_list_t *, int);
79 void metaslab_free(spa_t *, const blkptr_t *, uint64_t, boolean_t);
80 void metaslab_free_concrete(vdev_t *, uint64_t, uint64_t, boolean_t);
81 void metaslab_free_dva(spa_t *, const dva_t *, boolean_t);
82 void metaslab_free_impl_cb(uint64_t, vdev_t *, uint64_t, uint64_t, void *);
83 void metaslab_unalloc_dva(spa_t *, const dva_t *, uint64_t);
84 int metaslab_claim(spa_t *, const blkptr_t *, uint64_t);
85 int metaslab_claim_impl(vdev_t *, uint64_t, uint64_t, uint64_t);
86 void metaslab_check_free(spa_t *, const blkptr_t *);
87
88 void metaslab_alloc_trace_init(void);
89 void metaslab_alloc_trace_fini(void);
90 void metaslab_trace_init(zio_alloc_list_t *);
91 void metaslab_trace_fini(zio_alloc_list_t *);
92
93 metaslab_class_t *metaslab_class_create(spa_t *, metaslab_ops_t *);
94 void metaslab_class_destroy(metaslab_class_t *);
95 int metaslab_class_validate(metaslab_class_t *);
96 void metaslab_class_histogram_verify(metaslab_class_t *);
97 uint64_t metaslab_class_fragmentation(metaslab_class_t *);
98 uint64_t metaslab_class_expandable_space(metaslab_class_t *);
99 boolean_t metaslab_class_throttle_reserve(metaslab_class_t *, int, int,
100 zio_t *, int);
101 void metaslab_class_throttle_unreserve(metaslab_class_t *, int, int, zio_t *);
102
103 uint64_t metaslab_class_get_alloc(metaslab_class_t *);
104 uint64_t metaslab_class_get_space(metaslab_class_t *);
105 uint64_t metaslab_class_get_dspace(metaslab_class_t *);
106 uint64_t metaslab_class_get_deferred(metaslab_class_t *);
107
108 metaslab_group_t *metaslab_group_create(metaslab_class_t *, vdev_t *, int);
109 void metaslab_group_destroy(metaslab_group_t *);
110 void metaslab_group_activate(metaslab_group_t *);
111 void metaslab_group_passivate(metaslab_group_t *);
112 boolean_t metaslab_group_initialized(metaslab_group_t *);
113 uint64_t metaslab_group_get_space(metaslab_group_t *);
114 void metaslab_group_histogram_verify(metaslab_group_t *);
115 uint64_t metaslab_group_fragmentation(metaslab_group_t *);
116 void metaslab_group_histogram_remove(metaslab_group_t *, metaslab_t *);
117 void metaslab_group_alloc_decrement(spa_t *, uint64_t, void *, int, int,
118 boolean_t);
119 void metaslab_group_alloc_verify(spa_t *, const blkptr_t *, void *, int);
120 void metaslab_recalculate_weight_and_sort(metaslab_t *);
121
122 #ifdef __cplusplus
123 }
124 #endif
125
126 #endif /* _SYS_METASLAB_H */