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, 2017 by Delphix. All rights reserved.
24 * Copyright 2016 Nexenta Systems, Inc. All rights reserved.
25 */
26
27 #ifndef _SYS_DSL_POOL_H
28 #define _SYS_DSL_POOL_H
29
30 #include <sys/spa.h>
31 #include <sys/txg.h>
32 #include <sys/txg_impl.h>
33 #include <sys/zfs_context.h>
34 #include <sys/zio.h>
35 #include <sys/dnode.h>
36 #include <sys/ddt.h>
37 #include <sys/arc.h>
38 #include <sys/bpobj.h>
39 #include <sys/bptree.h>
40 #include <sys/rrwlock.h>
41
42 #ifdef __cplusplus
43 extern "C" {
44 #endif
45
46 struct objset;
47 struct dsl_dir;
48 struct dsl_dataset;
49 struct dsl_pool;
50 struct dmu_tx;
51 struct dsl_scan;
52
53 extern uint64_t zfs_dirty_data_max;
54 extern uint64_t zfs_dirty_data_max_max;
55 extern uint64_t zfs_dirty_data_sync;
56 extern int zfs_dirty_data_max_percent;
57 extern int zfs_delay_min_dirty_percent;
58 extern uint64_t zfs_delay_scale;
59
60 /* These macros are for indexing into the zfs_all_blkstats_t. */
61 #define DMU_OT_DEFERRED DMU_OT_NONE
62 #define DMU_OT_OTHER DMU_OT_NUMTYPES /* place holder for DMU_OT() types */
63 #define DMU_OT_TOTAL (DMU_OT_NUMTYPES + 1)
64
65 typedef struct zfs_blkstat {
66 uint64_t zb_count;
67 uint64_t zb_asize;
68 uint64_t zb_lsize;
69 uint64_t zb_psize;
70 uint64_t zb_gangs;
71 uint64_t zb_ditto_2_of_2_samevdev;
72 uint64_t zb_ditto_2_of_3_samevdev;
73 uint64_t zb_ditto_3_of_3_samevdev;
74 } zfs_blkstat_t;
75
76 typedef struct zfs_all_blkstats {
77 zfs_blkstat_t zab_type[DN_MAX_LEVELS + 1][DMU_OT_TOTAL + 1];
78 } zfs_all_blkstats_t;
79
80
81 typedef struct dsl_pool {
82 /* Immutable */
83 spa_t *dp_spa;
84 struct objset *dp_meta_objset;
85 struct dsl_dir *dp_root_dir;
86 struct dsl_dir *dp_mos_dir;
87 struct dsl_dir *dp_free_dir;
88 struct dsl_dir *dp_leak_dir;
89 struct dsl_dataset *dp_origin_snap;
90 uint64_t dp_root_dir_obj;
91 struct taskq *dp_vnrele_taskq;
92
93 /* No lock needed - sync context only */
94 blkptr_t dp_meta_rootbp;
95 uint64_t dp_tmp_userrefs_obj;
96 bpobj_t dp_free_bpobj;
97 uint64_t dp_bptree_obj;
98 uint64_t dp_empty_bpobj;
99 bpobj_t dp_obsolete_bpobj;
100
101 struct dsl_scan *dp_scan;
102
103 /* Uses dp_lock */
104 kmutex_t dp_lock;
105 kcondvar_t dp_spaceavail_cv;
106 uint64_t dp_dirty_pertxg[TXG_SIZE];
107 uint64_t dp_dirty_total;
108 uint64_t dp_long_free_dirty_pertxg[TXG_SIZE];
109 uint64_t dp_mos_used_delta;
110 uint64_t dp_mos_compressed_delta;
111 uint64_t dp_mos_uncompressed_delta;
112
113 /*
114 * Time of most recently scheduled (furthest in the future)
115 * wakeup for delayed transactions.
116 */
117 hrtime_t dp_last_wakeup;
118
119 /* Has its own locking */
120 tx_state_t dp_tx;
121 txg_list_t dp_dirty_datasets;
122 txg_list_t dp_dirty_zilogs;
123 txg_list_t dp_dirty_dirs;
124 txg_list_t dp_sync_tasks;
125 taskq_t *dp_sync_taskq;
126 taskq_t *dp_zil_clean_taskq;
127
128 /*
129 * Protects administrative changes (properties, namespace)
130 *
131 * It is only held for write in syncing context. Therefore
132 * syncing context does not need to ever have it for read, since
133 * nobody else could possibly have it for write.
134 */
135 rrwlock_t dp_config_rwlock;
136
137 zfs_all_blkstats_t *dp_blkstats;
138 } dsl_pool_t;
139
140 int dsl_pool_init(spa_t *spa, uint64_t txg, dsl_pool_t **dpp);
141 int dsl_pool_open(dsl_pool_t *dp);
142 void dsl_pool_close(dsl_pool_t *dp);
143 dsl_pool_t *dsl_pool_create(spa_t *spa, nvlist_t *zplprops, uint64_t txg);
144 void dsl_pool_sync(dsl_pool_t *dp, uint64_t txg);
145 void dsl_pool_sync_done(dsl_pool_t *dp, uint64_t txg);
146 int dsl_pool_sync_context(dsl_pool_t *dp);
147 uint64_t dsl_pool_adjustedsize(dsl_pool_t *dp, boolean_t netfree);
148 void dsl_pool_dirty_space(dsl_pool_t *dp, int64_t space, dmu_tx_t *tx);
149 void dsl_pool_undirty_space(dsl_pool_t *dp, int64_t space, uint64_t txg);
150 void dsl_free(dsl_pool_t *dp, uint64_t txg, const blkptr_t *bpp);
151 void dsl_free_sync(zio_t *pio, dsl_pool_t *dp, uint64_t txg,
152 const blkptr_t *bpp);
153 void dsl_pool_create_origin(dsl_pool_t *dp, dmu_tx_t *tx);
154 void dsl_pool_upgrade_clones(dsl_pool_t *dp, dmu_tx_t *tx);
155 void dsl_pool_upgrade_dir_clones(dsl_pool_t *dp, dmu_tx_t *tx);
156 void dsl_pool_mos_diduse_space(dsl_pool_t *dp,
157 int64_t used, int64_t comp, int64_t uncomp);
158 void dsl_pool_config_enter(dsl_pool_t *dp, void *tag);
159 void dsl_pool_config_enter_prio(dsl_pool_t *dp, void *tag);
160 void dsl_pool_config_exit(dsl_pool_t *dp, void *tag);
161 boolean_t dsl_pool_config_held(dsl_pool_t *dp);
162 boolean_t dsl_pool_config_held_writer(dsl_pool_t *dp);
163 boolean_t dsl_pool_need_dirty_delay(dsl_pool_t *dp);
164
165 taskq_t *dsl_pool_vnrele_taskq(dsl_pool_t *dp);
166
167 int dsl_pool_user_hold(dsl_pool_t *dp, uint64_t dsobj,
168 const char *tag, uint64_t now, dmu_tx_t *tx);
169 int dsl_pool_user_release(dsl_pool_t *dp, uint64_t dsobj,
170 const char *tag, dmu_tx_t *tx);
171 void dsl_pool_clean_tmp_userrefs(dsl_pool_t *dp);
172 int dsl_pool_open_special_dir(dsl_pool_t *dp, const char *name, dsl_dir_t **);
173 int dsl_pool_hold(const char *name, void *tag, dsl_pool_t **dp);
174 void dsl_pool_rele(dsl_pool_t *dp, void *tag);
175
176 void dsl_pool_create_obsolete_bpobj(dsl_pool_t *dp, dmu_tx_t *tx);
177 void dsl_pool_destroy_obsolete_bpobj(dsl_pool_t *dp, dmu_tx_t *tx);
178
179 #ifdef __cplusplus
180 }
181 #endif
182
183 #endif /* _SYS_DSL_POOL_H */