xref: /illumos-gate/usr/src/uts/common/fs/zfs/sys/metaslab.h (revision 4d7988d6)
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 void metaslab_set_unflushed_txg(metaslab_t *, uint64_t, dmu_tx_t *);
53 void metaslab_set_estimated_condensed_size(metaslab_t *, uint64_t, dmu_tx_t *);
54 uint64_t metaslab_unflushed_txg(metaslab_t *);
55 uint64_t metaslab_estimated_condensed_size(metaslab_t *);
56 int metaslab_sort_by_flushed(const void *, const void *);
57 uint64_t metaslab_unflushed_changes_memused(metaslab_t *);
58 
59 int metaslab_load(metaslab_t *);
60 void metaslab_unload(metaslab_t *);
61 boolean_t metaslab_flush(metaslab_t *, dmu_tx_t *);
62 
63 uint64_t metaslab_allocated_space(metaslab_t *);
64 
65 void metaslab_sync(metaslab_t *, uint64_t);
66 void metaslab_sync_done(metaslab_t *, uint64_t);
67 void metaslab_sync_reassess(metaslab_group_t *);
68 uint64_t metaslab_largest_allocatable(metaslab_t *);
69 
70 /*
71  * metaslab alloc flags
72  */
73 #define	METASLAB_HINTBP_FAVOR		0x0
74 #define	METASLAB_HINTBP_AVOID		0x1
75 #define	METASLAB_GANG_HEADER		0x2
76 #define	METASLAB_GANG_CHILD		0x4
77 #define	METASLAB_ASYNC_ALLOC		0x8
78 #define	METASLAB_DONT_THROTTLE		0x10
79 #define	METASLAB_MUST_RESERVE		0x20
80 #define	METASLAB_FASTWRITE		0x40
81 
82 int metaslab_alloc(spa_t *, metaslab_class_t *, uint64_t,
83     blkptr_t *, int, uint64_t, blkptr_t *, int, zio_alloc_list_t *, zio_t *,
84     int);
85 int metaslab_alloc_dva(spa_t *, metaslab_class_t *, uint64_t,
86     dva_t *, int, dva_t *, uint64_t, int, zio_alloc_list_t *, int);
87 void metaslab_free(spa_t *, const blkptr_t *, uint64_t, boolean_t);
88 void metaslab_free_concrete(vdev_t *, uint64_t, uint64_t, boolean_t);
89 void metaslab_free_dva(spa_t *, const dva_t *, boolean_t);
90 void metaslab_free_impl_cb(uint64_t, vdev_t *, uint64_t, uint64_t, void *);
91 void metaslab_unalloc_dva(spa_t *, const dva_t *, uint64_t);
92 int metaslab_claim(spa_t *, const blkptr_t *, uint64_t);
93 int metaslab_claim_impl(vdev_t *, uint64_t, uint64_t, uint64_t);
94 void metaslab_check_free(spa_t *, const blkptr_t *);
95 
96 void metaslab_stat_init(void);
97 void metaslab_stat_fini(void);
98 void metaslab_trace_init(zio_alloc_list_t *);
99 void metaslab_trace_fini(zio_alloc_list_t *);
100 
101 metaslab_class_t *metaslab_class_create(spa_t *, metaslab_ops_t *);
102 void metaslab_class_destroy(metaslab_class_t *);
103 int metaslab_class_validate(metaslab_class_t *);
104 void metaslab_class_histogram_verify(metaslab_class_t *);
105 uint64_t metaslab_class_fragmentation(metaslab_class_t *);
106 uint64_t metaslab_class_expandable_space(metaslab_class_t *);
107 boolean_t metaslab_class_throttle_reserve(metaslab_class_t *, int, int,
108     zio_t *, int);
109 void metaslab_class_throttle_unreserve(metaslab_class_t *, int, int, zio_t *);
110 void metaslab_class_evict_old(metaslab_class_t *, uint64_t);
111 uint64_t metaslab_class_get_alloc(metaslab_class_t *);
112 uint64_t metaslab_class_get_space(metaslab_class_t *);
113 uint64_t metaslab_class_get_dspace(metaslab_class_t *);
114 uint64_t metaslab_class_get_deferred(metaslab_class_t *);
115 
116 void metaslab_space_update(vdev_t *, metaslab_class_t *,
117     int64_t, int64_t, int64_t);
118 
119 metaslab_group_t *metaslab_group_create(metaslab_class_t *, vdev_t *, int);
120 void metaslab_group_destroy(metaslab_group_t *);
121 void metaslab_group_activate(metaslab_group_t *);
122 void metaslab_group_passivate(metaslab_group_t *);
123 boolean_t metaslab_group_initialized(metaslab_group_t *);
124 uint64_t metaslab_group_get_space(metaslab_group_t *);
125 void metaslab_group_histogram_verify(metaslab_group_t *);
126 uint64_t metaslab_group_fragmentation(metaslab_group_t *);
127 void metaslab_group_histogram_remove(metaslab_group_t *, metaslab_t *);
128 void metaslab_group_alloc_decrement(spa_t *, uint64_t, void *, int, int,
129     boolean_t);
130 void metaslab_group_alloc_verify(spa_t *, const blkptr_t *, void *, int);
131 void metaslab_recalculate_weight_and_sort(metaslab_t *);
132 void metaslab_disable(metaslab_t *);
133 void metaslab_enable(metaslab_t *, boolean_t, boolean_t);
134 void metaslab_set_selected_txg(metaslab_t *, uint64_t);
135 
136 extern int metaslab_debug_load;
137 
138 #ifdef	__cplusplus
139 }
140 #endif
141 
142 #endif	/* _SYS_METASLAB_H */
143