dsl_pool.h revision 268650 
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 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
42extern "C" {
43#endif
44
45struct objset;
46struct dsl_dir;
47struct dsl_dataset;
48struct dsl_pool;
49struct dmu_tx;
50struct dsl_scan;
51
52extern uint64_t zfs_dirty_data_max;
53extern uint64_t zfs_dirty_data_max_max;
54extern uint64_t zfs_dirty_data_sync;
55extern int zfs_dirty_data_max_percent;
56extern int zfs_delay_min_dirty_percent;
57extern uint64_t zfs_delay_scale;
58
59/* These macros are for indexing into the zfs_all_blkstats_t. */
60#define	DMU_OT_DEFERRED	DMU_OT_NONE
61#define	DMU_OT_OTHER	DMU_OT_NUMTYPES /* place holder for DMU_OT() types */
62#define	DMU_OT_TOTAL	(DMU_OT_NUMTYPES + 1)
63
64typedef struct zfs_blkstat {
65	uint64_t	zb_count;
66	uint64_t	zb_asize;
67	uint64_t	zb_lsize;
68	uint64_t	zb_psize;
69	uint64_t	zb_gangs;
70	uint64_t	zb_ditto_2_of_2_samevdev;
71	uint64_t	zb_ditto_2_of_3_samevdev;
72	uint64_t	zb_ditto_3_of_3_samevdev;
73} zfs_blkstat_t;
74
75typedef struct zfs_all_blkstats {
76	zfs_blkstat_t	zab_type[DN_MAX_LEVELS + 1][DMU_OT_TOTAL + 1];
77} zfs_all_blkstats_t;
78
79
80typedef struct dsl_pool {
81	/* Immutable */
82	spa_t *dp_spa;
83	struct objset *dp_meta_objset;
84	struct dsl_dir *dp_root_dir;
85	struct dsl_dir *dp_mos_dir;
86	struct dsl_dir *dp_free_dir;
87	struct dsl_dir *dp_leak_dir;
88	struct dsl_dataset *dp_origin_snap;
89	uint64_t dp_root_dir_obj;
90	struct taskq *dp_vnrele_taskq;
91
92	/* No lock needed - sync context only */
93	blkptr_t dp_meta_rootbp;
94	uint64_t dp_tmp_userrefs_obj;
95	bpobj_t dp_free_bpobj;
96	uint64_t dp_bptree_obj;
97	uint64_t dp_empty_bpobj;
98
99	struct dsl_scan *dp_scan;
100
101	/* Uses dp_lock */
102	kmutex_t dp_lock;
103	kcondvar_t dp_spaceavail_cv;
104	uint64_t dp_dirty_pertxg[TXG_SIZE];
105	uint64_t dp_dirty_total;
106	uint64_t dp_mos_used_delta;
107	uint64_t dp_mos_compressed_delta;
108	uint64_t dp_mos_uncompressed_delta;
109
110	/*
111	 * Time of most recently scheduled (furthest in the future)
112	 * wakeup for delayed transactions.
113	 */
114	hrtime_t dp_last_wakeup;
115
116	/* Has its own locking */
117	tx_state_t dp_tx;
118	txg_list_t dp_dirty_datasets;
119	txg_list_t dp_dirty_zilogs;
120	txg_list_t dp_dirty_dirs;
121	txg_list_t dp_sync_tasks;
122
123	/*
124	 * Protects administrative changes (properties, namespace)
125	 *
126	 * It is only held for write in syncing context.  Therefore
127	 * syncing context does not need to ever have it for read, since
128	 * nobody else could possibly have it for write.
129	 */
130	rrwlock_t dp_config_rwlock;
131
132	zfs_all_blkstats_t *dp_blkstats;
133} dsl_pool_t;
134
135int dsl_pool_init(spa_t *spa, uint64_t txg, dsl_pool_t **dpp);
136int dsl_pool_open(dsl_pool_t *dp);
137void dsl_pool_close(dsl_pool_t *dp);
138dsl_pool_t *dsl_pool_create(spa_t *spa, nvlist_t *zplprops, uint64_t txg);
139void dsl_pool_sync(dsl_pool_t *dp, uint64_t txg);
140void dsl_pool_sync_done(dsl_pool_t *dp, uint64_t txg);
141int dsl_pool_sync_context(dsl_pool_t *dp);
142uint64_t dsl_pool_adjustedsize(dsl_pool_t *dp, boolean_t netfree);
143uint64_t dsl_pool_adjustedfree(dsl_pool_t *dp, boolean_t netfree);
144void dsl_pool_dirty_space(dsl_pool_t *dp, int64_t space, dmu_tx_t *tx);
145void dsl_pool_undirty_space(dsl_pool_t *dp, int64_t space, uint64_t txg);
146void dsl_free(dsl_pool_t *dp, uint64_t txg, const blkptr_t *bpp);
147void dsl_free_sync(zio_t *pio, dsl_pool_t *dp, uint64_t txg,
148    const blkptr_t *bpp);
149void dsl_pool_create_origin(dsl_pool_t *dp, dmu_tx_t *tx);
150void dsl_pool_upgrade_clones(dsl_pool_t *dp, dmu_tx_t *tx);
151void dsl_pool_upgrade_dir_clones(dsl_pool_t *dp, dmu_tx_t *tx);
152void dsl_pool_mos_diduse_space(dsl_pool_t *dp,
153    int64_t used, int64_t comp, int64_t uncomp);
154void dsl_pool_config_enter(dsl_pool_t *dp, void *tag);
155void dsl_pool_config_exit(dsl_pool_t *dp, void *tag);
156boolean_t dsl_pool_config_held(dsl_pool_t *dp);
157boolean_t dsl_pool_need_dirty_delay(dsl_pool_t *dp);
158
159taskq_t *dsl_pool_vnrele_taskq(dsl_pool_t *dp);
160
161int dsl_pool_user_hold(dsl_pool_t *dp, uint64_t dsobj,
162    const char *tag, uint64_t now, dmu_tx_t *tx);
163int dsl_pool_user_release(dsl_pool_t *dp, uint64_t dsobj,
164    const char *tag, dmu_tx_t *tx);
165void dsl_pool_clean_tmp_userrefs(dsl_pool_t *dp);
166int dsl_pool_open_special_dir(dsl_pool_t *dp, const char *name, dsl_dir_t **);
167int dsl_pool_hold(const char *name, void *tag, dsl_pool_t **dp);
168void dsl_pool_rele(dsl_pool_t *dp, void *tag);
169
170#ifdef	__cplusplus
171}
172#endif
173
174#endif /* _SYS_DSL_POOL_H */
175