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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 | /* | |
9babb374 | 22 | * Copyright 2009 Sun Microsystems, Inc. All rights reserved. |
34dc7c2f | 23 | * Use is subject to license terms. |
6d974228 | 24 | * Copyright (c) 2011 by Delphix. All rights reserved. |
34dc7c2f BB |
25 | */ |
26 | ||
27 | #ifndef _SYS_METASLAB_IMPL_H | |
28 | #define _SYS_METASLAB_IMPL_H | |
29 | ||
34dc7c2f BB |
30 | #include <sys/metaslab.h> |
31 | #include <sys/space_map.h> | |
32 | #include <sys/vdev.h> | |
33 | #include <sys/txg.h> | |
34 | #include <sys/avl.h> | |
35 | ||
36 | #ifdef __cplusplus | |
37 | extern "C" { | |
38 | #endif | |
39 | ||
40 | struct metaslab_class { | |
428870ff | 41 | spa_t *mc_spa; |
34dc7c2f | 42 | metaslab_group_t *mc_rotor; |
9babb374 | 43 | space_map_ops_t *mc_ops; |
428870ff BB |
44 | uint64_t mc_aliquot; |
45 | uint64_t mc_alloc; /* total allocated space */ | |
46 | uint64_t mc_deferred; /* total deferred frees */ | |
47 | uint64_t mc_space; /* total space (alloc + free) */ | |
48 | uint64_t mc_dspace; /* total deflated space */ | |
34dc7c2f BB |
49 | }; |
50 | ||
51 | struct metaslab_group { | |
52 | kmutex_t mg_lock; | |
53 | avl_tree_t mg_metaslab_tree; | |
54 | uint64_t mg_aliquot; | |
428870ff | 55 | uint64_t mg_bonus_area; |
6d974228 | 56 | uint64_t mg_alloc_failures; |
34dc7c2f | 57 | int64_t mg_bias; |
428870ff | 58 | int64_t mg_activation_count; |
34dc7c2f BB |
59 | metaslab_class_t *mg_class; |
60 | vdev_t *mg_vd; | |
61 | metaslab_group_t *mg_prev; | |
62 | metaslab_group_t *mg_next; | |
63 | }; | |
64 | ||
65 | /* | |
66 | * Each metaslab's free space is tracked in space map object in the MOS, | |
67 | * which is only updated in syncing context. Each time we sync a txg, | |
68 | * we append the allocs and frees from that txg to the space map object. | |
69 | * When the txg is done syncing, metaslab_sync_done() updates ms_smo | |
70 | * to ms_smo_syncing. Everything in ms_smo is always safe to allocate. | |
71 | */ | |
72 | struct metaslab { | |
73 | kmutex_t ms_lock; /* metaslab lock */ | |
74 | space_map_obj_t ms_smo; /* synced space map object */ | |
75 | space_map_obj_t ms_smo_syncing; /* syncing space map object */ | |
76 | space_map_t ms_allocmap[TXG_SIZE]; /* allocated this txg */ | |
77 | space_map_t ms_freemap[TXG_SIZE]; /* freed this txg */ | |
428870ff | 78 | space_map_t ms_defermap[TXG_DEFER_SIZE]; /* deferred frees */ |
34dc7c2f | 79 | space_map_t ms_map; /* in-core free space map */ |
428870ff | 80 | int64_t ms_deferspace; /* sum of ms_defermap[] space */ |
34dc7c2f BB |
81 | uint64_t ms_weight; /* weight vs. others in group */ |
82 | metaslab_group_t *ms_group; /* metaslab group */ | |
83 | avl_node_t ms_group_node; /* node in metaslab group tree */ | |
84 | txg_node_t ms_txg_node; /* per-txg dirty metaslab links */ | |
85 | }; | |
86 | ||
87 | #ifdef __cplusplus | |
88 | } | |
89 | #endif | |
90 | ||
91 | #endif /* _SYS_METASLAB_IMPL_H */ |