xref: /illumos-gate/usr/src/uts/common/fs/zfs/sys/dsl_pool.h (revision 2bcb5458)
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 
100 	struct dsl_scan *dp_scan;
101 
102 	/* Uses dp_lock */
103 	kmutex_t dp_lock;
104 	kcondvar_t dp_spaceavail_cv;
105 	uint64_t dp_dirty_pertxg[TXG_SIZE];
106 	uint64_t dp_dirty_total;
107 	uint64_t dp_long_free_dirty_pertxg[TXG_SIZE];
108 	uint64_t dp_mos_used_delta;
109 	uint64_t dp_mos_compressed_delta;
110 	uint64_t dp_mos_uncompressed_delta;
111 
112 	/*
113 	 * Time of most recently scheduled (furthest in the future)
114 	 * wakeup for delayed transactions.
115 	 */
116 	hrtime_t dp_last_wakeup;
117 
118 	/* Has its own locking */
119 	tx_state_t dp_tx;
120 	txg_list_t dp_dirty_datasets;
121 	txg_list_t dp_dirty_zilogs;
122 	txg_list_t dp_dirty_dirs;
123 	txg_list_t dp_sync_tasks;
124 	taskq_t *dp_sync_taskq;
125 	taskq_t *dp_zil_clean_taskq;
126 
127 	/*
128 	 * Protects administrative changes (properties, namespace)
129 	 *
130 	 * It is only held for write in syncing context.  Therefore
131 	 * syncing context does not need to ever have it for read, since
132 	 * nobody else could possibly have it for write.
133 	 */
134 	rrwlock_t dp_config_rwlock;
135 
136 	zfs_all_blkstats_t *dp_blkstats;
137 } dsl_pool_t;
138 
139 int dsl_pool_init(spa_t *spa, uint64_t txg, dsl_pool_t **dpp);
140 int dsl_pool_open(dsl_pool_t *dp);
141 void dsl_pool_close(dsl_pool_t *dp);
142 dsl_pool_t *dsl_pool_create(spa_t *spa, nvlist_t *zplprops, uint64_t txg);
143 void dsl_pool_sync(dsl_pool_t *dp, uint64_t txg);
144 void dsl_pool_sync_done(dsl_pool_t *dp, uint64_t txg);
145 int dsl_pool_sync_context(dsl_pool_t *dp);
146 uint64_t dsl_pool_adjustedsize(dsl_pool_t *dp, boolean_t netfree);
147 uint64_t dsl_pool_adjustedfree(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 #ifdef	__cplusplus
177 }
178 #endif
179 
180 #endif /* _SYS_DSL_POOL_H */
181