xref: /illumos-gate/usr/src/uts/common/fs/zfs/sys/dsl_pool.h (revision 88b7b0f29b20b808b9e06071885b1d6a3ddb6328)
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 2008 Sun Microsystems, Inc.  All rights reserved.
23  * Use is subject to license terms.
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 
36 #ifdef	__cplusplus
37 extern "C" {
38 #endif
39 
40 struct objset;
41 struct dsl_dir;
42 struct dsl_dataset;
43 struct dsl_pool;
44 struct dmu_tx;
45 
46 enum scrub_func {
47 	SCRUB_FUNC_NONE,
48 	SCRUB_FUNC_CLEAN,
49 	SCRUB_FUNC_NUMFUNCS
50 };
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_TOTAL	DMU_OT_NUMTYPES
55 
56 typedef struct zfs_blkstat {
57 	uint64_t	zb_count;
58 	uint64_t	zb_asize;
59 	uint64_t	zb_lsize;
60 	uint64_t	zb_psize;
61 	uint64_t	zb_gangs;
62 	uint64_t	zb_ditto_2_of_2_samevdev;
63 	uint64_t	zb_ditto_2_of_3_samevdev;
64 	uint64_t	zb_ditto_3_of_3_samevdev;
65 } zfs_blkstat_t;
66 
67 typedef struct zfs_all_blkstats {
68 	zfs_blkstat_t	zab_type[DN_MAX_LEVELS + 1][DMU_OT_TOTAL + 1];
69 } zfs_all_blkstats_t;
70 
71 
72 typedef struct dsl_pool {
73 	/* Immutable */
74 	spa_t *dp_spa;
75 	struct objset *dp_meta_objset;
76 	struct dsl_dir *dp_root_dir;
77 	struct dsl_dir *dp_mos_dir;
78 	struct dsl_dataset *dp_origin_snap;
79 	uint64_t dp_root_dir_obj;
80 
81 	/* No lock needed - sync context only */
82 	blkptr_t dp_meta_rootbp;
83 	list_t dp_synced_datasets;
84 	hrtime_t dp_read_overhead;
85 	uint64_t dp_throughput;
86 	uint64_t dp_write_limit;
87 
88 	/* Uses dp_lock */
89 	kmutex_t dp_lock;
90 	uint64_t dp_space_towrite[TXG_SIZE];
91 	uint64_t dp_tempreserved[TXG_SIZE];
92 
93 	enum scrub_func dp_scrub_func;
94 	uint64_t dp_scrub_queue_obj;
95 	uint64_t dp_scrub_min_txg;
96 	uint64_t dp_scrub_max_txg;
97 	zbookmark_t dp_scrub_bookmark;
98 	boolean_t dp_scrub_pausing;
99 	boolean_t dp_scrub_isresilver;
100 	uint64_t dp_scrub_start_time;
101 	kmutex_t dp_scrub_cancel_lock; /* protects dp_scrub_restart */
102 	boolean_t dp_scrub_restart;
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_dirs;
108 	txg_list_t dp_sync_tasks;
109 
110 	/*
111 	 * Protects administrative changes (properties, namespace)
112 	 * It is only held for write in syncing context.  Therefore
113 	 * syncing context does not need to ever have it for read, since
114 	 * nobody else could possibly have it for write.
115 	 */
116 	krwlock_t dp_config_rwlock;
117 
118 	zfs_all_blkstats_t *dp_blkstats;
119 } dsl_pool_t;
120 
121 int dsl_pool_open(spa_t *spa, uint64_t txg, dsl_pool_t **dpp);
122 void dsl_pool_close(dsl_pool_t *dp);
123 dsl_pool_t *dsl_pool_create(spa_t *spa, nvlist_t *zplprops, uint64_t txg);
124 void dsl_pool_sync(dsl_pool_t *dp, uint64_t txg);
125 void dsl_pool_zil_clean(dsl_pool_t *dp);
126 int dsl_pool_sync_context(dsl_pool_t *dp);
127 uint64_t dsl_pool_adjustedsize(dsl_pool_t *dp, boolean_t netfree);
128 int dsl_pool_tempreserve_space(dsl_pool_t *dp, uint64_t space, dmu_tx_t *tx);
129 void dsl_pool_tempreserve_clear(dsl_pool_t *dp, int64_t space, dmu_tx_t *tx);
130 void dsl_pool_memory_pressure(dsl_pool_t *dp);
131 void dsl_pool_willuse_space(dsl_pool_t *dp, int64_t space, dmu_tx_t *tx);
132 int dsl_free(zio_t *pio, dsl_pool_t *dp, uint64_t txg, const blkptr_t *bpp,
133     zio_done_func_t *done, void *private, uint32_t arc_flags);
134 void dsl_pool_ds_destroyed(struct dsl_dataset *ds, struct dmu_tx *tx);
135 void dsl_pool_ds_snapshotted(struct dsl_dataset *ds, struct dmu_tx *tx);
136 void dsl_pool_ds_clone_swapped(struct dsl_dataset *ds1, struct dsl_dataset *ds2,
137     struct dmu_tx *tx);
138 void dsl_pool_create_origin(dsl_pool_t *dp, dmu_tx_t *tx);
139 void dsl_pool_upgrade_clones(dsl_pool_t *dp, dmu_tx_t *tx);
140 
141 int dsl_pool_scrub_cancel(dsl_pool_t *dp);
142 int dsl_pool_scrub_clean(dsl_pool_t *dp);
143 void dsl_pool_scrub_sync(dsl_pool_t *dp, dmu_tx_t *tx);
144 void dsl_pool_scrub_restart(dsl_pool_t *dp);
145 
146 #ifdef	__cplusplus
147 }
148 #endif
149 
150 #endif /* _SYS_DSL_POOL_H */
151