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) 2012 by Delphix. All rights reserved.
24 */
25
26 #ifndef _SYS_DSL_POOL_H
27 #define _SYS_DSL_POOL_H
28
29 #include <sys/spa.h>
30 #include <sys/txg.h>
31 #include <sys/txg_impl.h>
32 #include <sys/zfs_context.h>
33 #include <sys/zio.h>
34 #include <sys/dnode.h>
35 #include <sys/ddt.h>
36 #include <sys/arc.h>
37 #include <sys/bpobj.h>
38 #include <sys/bptree.h>
39 #include <sys/rrwlock.h>
40
41 #ifdef __cplusplus
42 extern "C" {
43 #endif
44
45 struct objset;
46 struct dsl_dir;
47 struct dsl_dataset;
48 struct dsl_pool;
49 struct dmu_tx;
50 struct dsl_scan;
51
52 /* These macros are for indexing into the zfs_all_blkstats_t. */
53 #define DMU_OT_DEFERRED DMU_OT_NONE
54 #define DMU_OT_OTHER DMU_OT_NUMTYPES /* place holder for DMU_OT() types */
55 #define DMU_OT_TOTAL (DMU_OT_NUMTYPES + 1)
56
57 typedef struct zfs_blkstat {
58 uint64_t zb_count;
59 uint64_t zb_asize;
60 uint64_t zb_lsize;
61 uint64_t zb_psize;
62 uint64_t zb_gangs;
63 uint64_t zb_ditto_2_of_2_samevdev;
64 uint64_t zb_ditto_2_of_3_samevdev;
65 uint64_t zb_ditto_3_of_3_samevdev;
66 } zfs_blkstat_t;
67
68 typedef struct zfs_all_blkstats {
69 zfs_blkstat_t zab_type[DN_MAX_LEVELS + 1][DMU_OT_TOTAL + 1];
70 } zfs_all_blkstats_t;
71
72
73 typedef struct dsl_pool {
74 /* Immutable */
75 spa_t *dp_spa;
76 struct objset *dp_meta_objset;
77 struct dsl_dir *dp_root_dir;
78 struct dsl_dir *dp_mos_dir;
79 struct dsl_dir *dp_free_dir;
80 struct dsl_dataset *dp_origin_snap;
81 uint64_t dp_root_dir_obj;
82 struct taskq *dp_vnrele_taskq;
83
84 /* No lock needed - sync context only */
85 blkptr_t dp_meta_rootbp;
86 hrtime_t dp_read_overhead;
87 uint64_t dp_throughput; /* bytes per millisec */
88 uint64_t dp_write_limit;
89 uint64_t dp_tmp_userrefs_obj;
90 bpobj_t dp_free_bpobj;
91 uint64_t dp_bptree_obj;
92 uint64_t dp_empty_bpobj;
93
94 struct dsl_scan *dp_scan;
95
96 /* Uses dp_lock */
97 kmutex_t dp_lock;
98 uint64_t dp_space_towrite[TXG_SIZE];
99 uint64_t dp_tempreserved[TXG_SIZE];
100 uint64_t dp_mos_used_delta;
101 uint64_t dp_mos_compressed_delta;
102 uint64_t dp_mos_uncompressed_delta;
103
104 /* Has its own locking */
105 tx_state_t dp_tx;
106 txg_list_t dp_dirty_datasets;
107 txg_list_t dp_dirty_zilogs;
108 txg_list_t dp_dirty_dirs;
109 txg_list_t dp_sync_tasks;
110
111 /*
112 * Protects administrative changes (properties, namespace)
113 *
114 * It is only held for write in syncing context. Therefore
115 * syncing context does not need to ever have it for read, since
116 * nobody else could possibly have it for write.
117 */
118 rrwlock_t dp_config_rwlock;
119
120 zfs_all_blkstats_t *dp_blkstats;
121 } dsl_pool_t;
122
123 int dsl_pool_init(spa_t *spa, uint64_t txg, dsl_pool_t **dpp);
124 int dsl_pool_open(dsl_pool_t *dp);
125 void dsl_pool_close(dsl_pool_t *dp);
126 dsl_pool_t *dsl_pool_create(spa_t *spa, nvlist_t *zplprops, uint64_t txg);
127 void dsl_pool_sync(dsl_pool_t *dp, uint64_t txg);
128 void dsl_pool_sync_done(dsl_pool_t *dp, uint64_t txg);
129 int dsl_pool_sync_context(dsl_pool_t *dp);
130 uint64_t dsl_pool_adjustedsize(dsl_pool_t *dp, boolean_t netfree);
131 uint64_t dsl_pool_adjustedfree(dsl_pool_t *dp, boolean_t netfree);
132 int dsl_pool_tempreserve_space(dsl_pool_t *dp, uint64_t space, dmu_tx_t *tx);
133 void dsl_pool_tempreserve_clear(dsl_pool_t *dp, int64_t space, dmu_tx_t *tx);
134 void dsl_pool_memory_pressure(dsl_pool_t *dp);
135 void dsl_pool_willuse_space(dsl_pool_t *dp, int64_t space, dmu_tx_t *tx);
136 void dsl_free(dsl_pool_t *dp, uint64_t txg, const blkptr_t *bpp);
137 void dsl_free_sync(zio_t *pio, dsl_pool_t *dp, uint64_t txg,
138 const blkptr_t *bpp);
139 void dsl_pool_create_origin(dsl_pool_t *dp, dmu_tx_t *tx);
140 void dsl_pool_upgrade_clones(dsl_pool_t *dp, dmu_tx_t *tx);
141 void dsl_pool_upgrade_dir_clones(dsl_pool_t *dp, dmu_tx_t *tx);
142 void dsl_pool_mos_diduse_space(dsl_pool_t *dp,
143 int64_t used, int64_t comp, int64_t uncomp);
144 void dsl_pool_config_enter(dsl_pool_t *dp, void *tag);
145 void dsl_pool_config_exit(dsl_pool_t *dp, void *tag);
146 boolean_t dsl_pool_config_held(dsl_pool_t *dp);
147
148 taskq_t *dsl_pool_vnrele_taskq(dsl_pool_t *dp);
149
150 int dsl_pool_user_hold(dsl_pool_t *dp, uint64_t dsobj,
151 const char *tag, uint64_t now, dmu_tx_t *tx);
152 int dsl_pool_user_release(dsl_pool_t *dp, uint64_t dsobj,
153 const char *tag, dmu_tx_t *tx);
154 void dsl_pool_clean_tmp_userrefs(dsl_pool_t *dp);
155 int dsl_pool_open_special_dir(dsl_pool_t *dp, const char *name, dsl_dir_t **);
156 int dsl_pool_hold(const char *name, void *tag, dsl_pool_t **dp);
157 void dsl_pool_rele(dsl_pool_t *dp, void *tag);
158
159 #ifdef __cplusplus
160 }
161 #endif
162
163 #endif /* _SYS_DSL_POOL_H */