xref: /illumos-gate/usr/src/uts/common/fs/zfs/sys/dsl_pool.h (revision c5832a53)
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 #include <sys/dsl_synctask.h>
42 #include <sys/mmp.h>
43 
44 #ifdef	__cplusplus
45 extern "C" {
46 #endif
47 
48 struct objset;
49 struct dsl_dir;
50 struct dsl_dataset;
51 struct dsl_pool;
52 struct dmu_tx;
53 struct dsl_scan;
54 struct dsl_crypto_params;
55 
56 extern uint64_t zfs_dirty_data_max;
57 extern uint64_t zfs_dirty_data_max_max;
58 extern uint64_t zfs_dirty_data_sync_pct;
59 extern int zfs_dirty_data_max_percent;
60 extern int zfs_delay_min_dirty_percent;
61 extern uint64_t zfs_delay_scale;
62 
63 /* These macros are for indexing into the zfs_all_blkstats_t. */
64 #define	DMU_OT_DEFERRED	DMU_OT_NONE
65 #define	DMU_OT_OTHER	DMU_OT_NUMTYPES /* place holder for DMU_OT() types */
66 #define	DMU_OT_TOTAL	(DMU_OT_NUMTYPES + 1)
67 
68 typedef struct zfs_blkstat {
69 	uint64_t	zb_count;
70 	uint64_t	zb_asize;
71 	uint64_t	zb_lsize;
72 	uint64_t	zb_psize;
73 	uint64_t	zb_gangs;
74 	uint64_t	zb_ditto_2_of_2_samevdev;
75 	uint64_t	zb_ditto_2_of_3_samevdev;
76 	uint64_t	zb_ditto_3_of_3_samevdev;
77 } zfs_blkstat_t;
78 
79 typedef struct zfs_all_blkstats {
80 	zfs_blkstat_t	zab_type[DN_MAX_LEVELS + 1][DMU_OT_TOTAL + 1];
81 	kmutex_t	zab_lock;
82 } zfs_all_blkstats_t;
83 
84 
85 typedef struct dsl_pool {
86 	/* Immutable */
87 	spa_t *dp_spa;
88 	struct objset *dp_meta_objset;
89 	struct dsl_dir *dp_root_dir;
90 	struct dsl_dir *dp_mos_dir;
91 	struct dsl_dir *dp_free_dir;
92 	struct dsl_dir *dp_leak_dir;
93 	struct dsl_dataset *dp_origin_snap;
94 	uint64_t dp_root_dir_obj;
95 	taskq_t *dp_vnrele_taskq;
96 	struct taskq *dp_unlinked_drain_taskq;
97 
98 	/* No lock needed - sync context only */
99 	blkptr_t dp_meta_rootbp;
100 	uint64_t dp_tmp_userrefs_obj;
101 	bpobj_t dp_free_bpobj;
102 	uint64_t dp_bptree_obj;
103 	uint64_t dp_empty_bpobj;
104 	bpobj_t dp_obsolete_bpobj;
105 
106 	struct dsl_scan *dp_scan;
107 
108 	/* Uses dp_lock */
109 	kmutex_t dp_lock;
110 	kcondvar_t dp_spaceavail_cv;
111 	uint64_t dp_dirty_pertxg[TXG_SIZE];
112 	uint64_t dp_dirty_total;
113 	uint64_t dp_long_free_dirty_pertxg[TXG_SIZE];
114 	uint64_t dp_mos_used_delta;
115 	uint64_t dp_mos_compressed_delta;
116 	uint64_t dp_mos_uncompressed_delta;
117 
118 	/*
119 	 * Time of most recently scheduled (furthest in the future)
120 	 * wakeup for delayed transactions.
121 	 */
122 	hrtime_t dp_last_wakeup;
123 
124 	/* Has its own locking */
125 	tx_state_t dp_tx;
126 	txg_list_t dp_dirty_datasets;
127 	txg_list_t dp_dirty_zilogs;
128 	txg_list_t dp_dirty_dirs;
129 	txg_list_t dp_sync_tasks;
130 	txg_list_t dp_early_sync_tasks;
131 	taskq_t *dp_sync_taskq;
132 	taskq_t *dp_zil_clean_taskq;
133 
134 	/*
135 	 * Protects administrative changes (properties, namespace)
136 	 *
137 	 * It is only held for write in syncing context.  Therefore
138 	 * syncing context does not need to ever have it for read, since
139 	 * nobody else could possibly have it for write.
140 	 */
141 	rrwlock_t dp_config_rwlock;
142 
143 	zfs_all_blkstats_t *dp_blkstats;
144 } dsl_pool_t;
145 
146 int dsl_pool_init(spa_t *spa, uint64_t txg, dsl_pool_t **dpp);
147 int dsl_pool_open(dsl_pool_t *dp);
148 void dsl_pool_close(dsl_pool_t *dp);
149 dsl_pool_t *dsl_pool_create(spa_t *spa, nvlist_t *zplprops,
150     struct dsl_crypto_params *dcp, uint64_t txg);
151 void dsl_pool_sync(dsl_pool_t *dp, uint64_t txg);
152 void dsl_pool_sync_done(dsl_pool_t *dp, uint64_t txg);
153 int dsl_pool_sync_context(dsl_pool_t *dp);
154 uint64_t dsl_pool_adjustedsize(dsl_pool_t *dp, zfs_space_check_t slop_policy);
155 uint64_t dsl_pool_unreserved_space(dsl_pool_t *dp,
156     zfs_space_check_t slop_policy);
157 void dsl_pool_dirty_space(dsl_pool_t *dp, int64_t space, dmu_tx_t *tx);
158 void dsl_pool_undirty_space(dsl_pool_t *dp, int64_t space, uint64_t txg);
159 void dsl_free(dsl_pool_t *dp, uint64_t txg, const blkptr_t *bpp);
160 void dsl_free_sync(zio_t *pio, dsl_pool_t *dp, uint64_t txg,
161     const blkptr_t *bpp);
162 void dsl_pool_create_origin(dsl_pool_t *dp, dmu_tx_t *tx);
163 void dsl_pool_upgrade_clones(dsl_pool_t *dp, dmu_tx_t *tx);
164 void dsl_pool_upgrade_dir_clones(dsl_pool_t *dp, dmu_tx_t *tx);
165 void dsl_pool_mos_diduse_space(dsl_pool_t *dp,
166     int64_t used, int64_t comp, int64_t uncomp);
167 void dsl_pool_ckpoint_diduse_space(dsl_pool_t *dp,
168     int64_t used, int64_t comp, int64_t uncomp);
169 void dsl_pool_config_enter(dsl_pool_t *dp, void *tag);
170 void dsl_pool_config_enter_prio(dsl_pool_t *dp, void *tag);
171 void dsl_pool_config_exit(dsl_pool_t *dp, void *tag);
172 boolean_t dsl_pool_config_held(dsl_pool_t *dp);
173 boolean_t dsl_pool_config_held_writer(dsl_pool_t *dp);
174 boolean_t dsl_pool_need_dirty_delay(dsl_pool_t *dp);
175 
176 taskq_t *dsl_pool_vnrele_taskq(dsl_pool_t *dp);
177 taskq_t *dsl_pool_unlinked_drain_taskq(dsl_pool_t *dp);
178 
179 int dsl_pool_user_hold(dsl_pool_t *dp, uint64_t dsobj,
180     const char *tag, uint64_t now, dmu_tx_t *tx);
181 int dsl_pool_user_release(dsl_pool_t *dp, uint64_t dsobj,
182     const char *tag, dmu_tx_t *tx);
183 void dsl_pool_clean_tmp_userrefs(dsl_pool_t *dp);
184 int dsl_pool_open_special_dir(dsl_pool_t *dp, const char *name, dsl_dir_t **);
185 int dsl_pool_hold(const char *name, void *tag, dsl_pool_t **dp);
186 void dsl_pool_rele(dsl_pool_t *dp, void *tag);
187 
188 void dsl_pool_create_obsolete_bpobj(dsl_pool_t *dp, dmu_tx_t *tx);
189 void dsl_pool_destroy_obsolete_bpobj(dsl_pool_t *dp, dmu_tx_t *tx);
190 
191 #ifdef	__cplusplus
192 }
193 #endif
194 
195 #endif /* _SYS_DSL_POOL_H */
196