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) 2013 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 extern uint64_t zfs_dirty_data_max;
53 extern uint64_t zfs_dirty_data_max_max;
54 extern uint64_t zfs_dirty_data_sync;
55 extern int zfs_dirty_data_max_percent;
56 extern int zfs_delay_min_dirty_percent;
57 extern uint64_t zfs_delay_scale;
58
59 /* These macros are for indexing into the zfs_all_blkstats_t. */
60 #define DMU_OT_DEFERRED DMU_OT_NONE
61 #define DMU_OT_OTHER DMU_OT_NUMTYPES /* place holder for DMU_OT() types */
62 #define DMU_OT_TOTAL (DMU_OT_NUMTYPES + 1)
63
64 typedef struct zfs_blkstat {
65 uint64_t zb_count;
66 uint64_t zb_asize;
67 uint64_t zb_lsize;
68 uint64_t zb_psize;
69 uint64_t zb_gangs;
70 uint64_t zb_ditto_2_of_2_samevdev;
71 uint64_t zb_ditto_2_of_3_samevdev;
72 uint64_t zb_ditto_3_of_3_samevdev;
73 } zfs_blkstat_t;
74
75 typedef struct zfs_all_blkstats {
76 zfs_blkstat_t zab_type[DN_MAX_LEVELS + 1][DMU_OT_TOTAL + 1];
77 } zfs_all_blkstats_t;
78
79
80 typedef struct dsl_pool {
81 /* Immutable */
82 spa_t *dp_spa;
83 struct objset *dp_meta_objset;
84 struct dsl_dir *dp_root_dir;
85 struct dsl_dir *dp_mos_dir;
86 struct dsl_dir *dp_free_dir;
87 struct dsl_dataset *dp_origin_snap;
88 uint64_t dp_root_dir_obj;
89 struct taskq *dp_vnrele_taskq;
90
91 /* No lock needed - sync context only */
92 blkptr_t dp_meta_rootbp;
93 uint64_t dp_tmp_userrefs_obj;
94 bpobj_t dp_free_bpobj;
95 uint64_t dp_bptree_obj;
96 uint64_t dp_empty_bpobj;
97
98 struct dsl_scan *dp_scan;
99
100 /* Uses dp_lock */
101 kmutex_t dp_lock;
102 kcondvar_t dp_spaceavail_cv;
103 uint64_t dp_dirty_pertxg[TXG_SIZE];
104 uint64_t dp_dirty_total;
105 uint64_t dp_mos_used_delta;
106 uint64_t dp_mos_compressed_delta;
107 uint64_t dp_mos_uncompressed_delta;
108
109 /*
110 * Time of most recently scheduled (furthest in the future)
111 * wakeup for delayed transactions.
112 */
113 hrtime_t dp_last_wakeup;
114
115 /* Has its own locking */
116 tx_state_t dp_tx;
117 txg_list_t dp_dirty_datasets;
118 txg_list_t dp_dirty_zilogs;
119 txg_list_t dp_dirty_dirs;
120 txg_list_t dp_sync_tasks;
121
122 /*
123 * Protects administrative changes (properties, namespace)
124 *
125 * It is only held for write in syncing context. Therefore
126 * syncing context does not need to ever have it for read, since
127 * nobody else could possibly have it for write.
128 */
129 rrwlock_t dp_config_rwlock;
130
131 zfs_all_blkstats_t *dp_blkstats;
132 } dsl_pool_t;
133
134 int dsl_pool_init(spa_t *spa, uint64_t txg, dsl_pool_t **dpp);
135 int dsl_pool_open(dsl_pool_t *dp);
136 void dsl_pool_close(dsl_pool_t *dp);
137 dsl_pool_t *dsl_pool_create(spa_t *spa, nvlist_t *zplprops, uint64_t txg);
138 void dsl_pool_sync(dsl_pool_t *dp, uint64_t txg);
139 void dsl_pool_sync_done(dsl_pool_t *dp, uint64_t txg);
140 int dsl_pool_sync_context(dsl_pool_t *dp);
141 uint64_t dsl_pool_adjustedsize(dsl_pool_t *dp, boolean_t netfree);
142 uint64_t dsl_pool_adjustedfree(dsl_pool_t *dp, boolean_t netfree);
143 void dsl_pool_dirty_space(dsl_pool_t *dp, int64_t space, dmu_tx_t *tx);
144 void dsl_pool_undirty_space(dsl_pool_t *dp, int64_t space, uint64_t txg);
145 void dsl_free(dsl_pool_t *dp, uint64_t txg, const blkptr_t *bpp);
146 void dsl_free_sync(zio_t *pio, dsl_pool_t *dp, uint64_t txg,
147 const blkptr_t *bpp);
148 void dsl_pool_create_origin(dsl_pool_t *dp, dmu_tx_t *tx);
149 void dsl_pool_upgrade_clones(dsl_pool_t *dp, dmu_tx_t *tx);
150 void dsl_pool_upgrade_dir_clones(dsl_pool_t *dp, dmu_tx_t *tx);
151 void dsl_pool_mos_diduse_space(dsl_pool_t *dp,
152 int64_t used, int64_t comp, int64_t uncomp);
153 void dsl_pool_config_enter(dsl_pool_t *dp, void *tag);
154 void dsl_pool_config_exit(dsl_pool_t *dp, void *tag);
155 boolean_t dsl_pool_config_held(dsl_pool_t *dp);
156 boolean_t dsl_pool_need_dirty_delay(dsl_pool_t *dp);
157
158 taskq_t *dsl_pool_vnrele_taskq(dsl_pool_t *dp);
159
160 int dsl_pool_user_hold(dsl_pool_t *dp, uint64_t dsobj,
161 const char *tag, uint64_t now, dmu_tx_t *tx);
162 int dsl_pool_user_release(dsl_pool_t *dp, uint64_t dsobj,
163 const char *tag, dmu_tx_t *tx);
164 void dsl_pool_clean_tmp_userrefs(dsl_pool_t *dp);
165 int dsl_pool_open_special_dir(dsl_pool_t *dp, const char *name, dsl_dir_t **);
166 int dsl_pool_hold(const char *name, void *tag, dsl_pool_t **dp);
167 void dsl_pool_rele(dsl_pool_t *dp, void *tag);
168
169 #ifdef __cplusplus
170 }
171 #endif
172
173 #endif /* _SYS_DSL_POOL_H */