xref: /illumos-gate/usr/src/uts/common/fs/zfs/sys/dsl_pool.h (revision 3b2aab18)
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 	 * It is only held for write in syncing context.  Therefore
114 	 * syncing context does not need to ever have it for read, since
115 	 * nobody else could possibly have it for write.
116 	 */
117 	rrwlock_t dp_config_rwlock;
118 
119 	zfs_all_blkstats_t *dp_blkstats;
120 } dsl_pool_t;
121 
122 int dsl_pool_init(spa_t *spa, uint64_t txg, dsl_pool_t **dpp);
123 int dsl_pool_open(dsl_pool_t *dp);
124 void dsl_pool_close(dsl_pool_t *dp);
125 dsl_pool_t *dsl_pool_create(spa_t *spa, nvlist_t *zplprops, uint64_t txg);
126 void dsl_pool_sync(dsl_pool_t *dp, uint64_t txg);
127 void dsl_pool_sync_done(dsl_pool_t *dp, uint64_t txg);
128 int dsl_pool_sync_context(dsl_pool_t *dp);
129 uint64_t dsl_pool_adjustedsize(dsl_pool_t *dp, boolean_t netfree);
130 uint64_t dsl_pool_adjustedfree(dsl_pool_t *dp, boolean_t netfree);
131 int dsl_pool_tempreserve_space(dsl_pool_t *dp, uint64_t space, dmu_tx_t *tx);
132 void dsl_pool_tempreserve_clear(dsl_pool_t *dp, int64_t space, dmu_tx_t *tx);
133 void dsl_pool_memory_pressure(dsl_pool_t *dp);
134 void dsl_pool_willuse_space(dsl_pool_t *dp, int64_t space, dmu_tx_t *tx);
135 void dsl_free(dsl_pool_t *dp, uint64_t txg, const blkptr_t *bpp);
136 void dsl_free_sync(zio_t *pio, dsl_pool_t *dp, uint64_t txg,
137     const blkptr_t *bpp);
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 void dsl_pool_upgrade_dir_clones(dsl_pool_t *dp, dmu_tx_t *tx);
141 void dsl_pool_mos_diduse_space(dsl_pool_t *dp,
142     int64_t used, int64_t comp, int64_t uncomp);
143 void dsl_pool_config_enter(dsl_pool_t *dp, void *tag);
144 void dsl_pool_config_exit(dsl_pool_t *dp, void *tag);
145 boolean_t dsl_pool_config_held(dsl_pool_t *dp);
146 
147 taskq_t *dsl_pool_vnrele_taskq(dsl_pool_t *dp);
148 
149 int dsl_pool_user_hold(dsl_pool_t *dp, uint64_t dsobj,
150     const char *tag, uint64_t now, dmu_tx_t *tx);
151 int dsl_pool_user_release(dsl_pool_t *dp, uint64_t dsobj,
152     const char *tag, dmu_tx_t *tx);
153 void dsl_pool_clean_tmp_userrefs(dsl_pool_t *dp);
154 int dsl_pool_open_special_dir(dsl_pool_t *dp, const char *name, dsl_dir_t **);
155 int dsl_pool_hold(const char *name, void *tag, dsl_pool_t **dp);
156 void dsl_pool_rele(dsl_pool_t *dp, void *tag);
157 
158 #ifdef	__cplusplus
159 }
160 #endif
161 
162 #endif /* _SYS_DSL_POOL_H */
163