dsl_pool.h revision 332547 
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
43#ifdef	__cplusplus
44extern "C" {
45#endif
46
47struct objset;
48struct dsl_dir;
49struct dsl_dataset;
50struct dsl_pool;
51struct dmu_tx;
52struct dsl_scan;
53
54extern uint64_t zfs_dirty_data_max;
55extern uint64_t zfs_dirty_data_max_max;
56extern uint64_t zfs_dirty_data_sync;
57extern int zfs_dirty_data_max_percent;
58extern int zfs_delay_min_dirty_percent;
59extern uint64_t zfs_delay_scale;
60
61/* These macros are for indexing into the zfs_all_blkstats_t. */
62#define	DMU_OT_DEFERRED	DMU_OT_NONE
63#define	DMU_OT_OTHER	DMU_OT_NUMTYPES /* place holder for DMU_OT() types */
64#define	DMU_OT_TOTAL	(DMU_OT_NUMTYPES + 1)
65
66typedef struct zfs_blkstat {
67	uint64_t	zb_count;
68	uint64_t	zb_asize;
69	uint64_t	zb_lsize;
70	uint64_t	zb_psize;
71	uint64_t	zb_gangs;
72	uint64_t	zb_ditto_2_of_2_samevdev;
73	uint64_t	zb_ditto_2_of_3_samevdev;
74	uint64_t	zb_ditto_3_of_3_samevdev;
75} zfs_blkstat_t;
76
77typedef struct zfs_all_blkstats {
78	zfs_blkstat_t	zab_type[DN_MAX_LEVELS + 1][DMU_OT_TOTAL + 1];
79} zfs_all_blkstats_t;
80
81
82typedef struct dsl_pool {
83	/* Immutable */
84	spa_t *dp_spa;
85	struct objset *dp_meta_objset;
86	struct dsl_dir *dp_root_dir;
87	struct dsl_dir *dp_mos_dir;
88	struct dsl_dir *dp_free_dir;
89	struct dsl_dir *dp_leak_dir;
90	struct dsl_dataset *dp_origin_snap;
91	uint64_t dp_root_dir_obj;
92	struct taskq *dp_vnrele_taskq;
93
94	/* No lock needed - sync context only */
95	blkptr_t dp_meta_rootbp;
96	uint64_t dp_tmp_userrefs_obj;
97	bpobj_t dp_free_bpobj;
98	uint64_t dp_bptree_obj;
99	uint64_t dp_empty_bpobj;
100	bpobj_t dp_obsolete_bpobj;
101
102	struct dsl_scan *dp_scan;
103
104	/* Uses dp_lock */
105	kmutex_t dp_lock;
106	kcondvar_t dp_spaceavail_cv;
107	uint64_t dp_dirty_pertxg[TXG_SIZE];
108	uint64_t dp_dirty_total;
109	uint64_t dp_long_free_dirty_pertxg[TXG_SIZE];
110	uint64_t dp_mos_used_delta;
111	uint64_t dp_mos_compressed_delta;
112	uint64_t dp_mos_uncompressed_delta;
113
114	/*
115	 * Time of most recently scheduled (furthest in the future)
116	 * wakeup for delayed transactions.
117	 */
118	hrtime_t dp_last_wakeup;
119
120	/* Has its own locking */
121	tx_state_t dp_tx;
122	txg_list_t dp_dirty_datasets;
123	txg_list_t dp_dirty_zilogs;
124	txg_list_t dp_dirty_dirs;
125	txg_list_t dp_sync_tasks;
126	txg_list_t dp_early_sync_tasks;
127	taskq_t *dp_sync_taskq;
128	taskq_t *dp_zil_clean_taskq;
129
130	/*
131	 * Protects administrative changes (properties, namespace)
132	 *
133	 * It is only held for write in syncing context.  Therefore
134	 * syncing context does not need to ever have it for read, since
135	 * nobody else could possibly have it for write.
136	 */
137	rrwlock_t dp_config_rwlock;
138
139	zfs_all_blkstats_t *dp_blkstats;
140} dsl_pool_t;
141
142int dsl_pool_init(spa_t *spa, uint64_t txg, dsl_pool_t **dpp);
143int dsl_pool_open(dsl_pool_t *dp);
144void dsl_pool_close(dsl_pool_t *dp);
145dsl_pool_t *dsl_pool_create(spa_t *spa, nvlist_t *zplprops, uint64_t txg);
146void dsl_pool_sync(dsl_pool_t *dp, uint64_t txg);
147void dsl_pool_sync_done(dsl_pool_t *dp, uint64_t txg);
148int dsl_pool_sync_context(dsl_pool_t *dp);
149uint64_t dsl_pool_adjustedsize(dsl_pool_t *dp, zfs_space_check_t slop_policy);
150uint64_t dsl_pool_unreserved_space(dsl_pool_t *dp,
151    zfs_space_check_t slop_policy);
152void dsl_pool_dirty_space(dsl_pool_t *dp, int64_t space, dmu_tx_t *tx);
153void dsl_pool_undirty_space(dsl_pool_t *dp, int64_t space, uint64_t txg);
154void dsl_free(dsl_pool_t *dp, uint64_t txg, const blkptr_t *bpp);
155void dsl_free_sync(zio_t *pio, dsl_pool_t *dp, uint64_t txg,
156    const blkptr_t *bpp);
157void dsl_pool_create_origin(dsl_pool_t *dp, dmu_tx_t *tx);
158void dsl_pool_upgrade_clones(dsl_pool_t *dp, dmu_tx_t *tx);
159void dsl_pool_upgrade_dir_clones(dsl_pool_t *dp, dmu_tx_t *tx);
160void dsl_pool_mos_diduse_space(dsl_pool_t *dp,
161    int64_t used, int64_t comp, int64_t uncomp);
162void dsl_pool_ckpoint_diduse_space(dsl_pool_t *dp,
163    int64_t used, int64_t comp, int64_t uncomp);
164void dsl_pool_config_enter(dsl_pool_t *dp, void *tag);
165void dsl_pool_config_enter_prio(dsl_pool_t *dp, void *tag);
166void dsl_pool_config_exit(dsl_pool_t *dp, void *tag);
167boolean_t dsl_pool_config_held(dsl_pool_t *dp);
168boolean_t dsl_pool_config_held_writer(dsl_pool_t *dp);
169boolean_t dsl_pool_need_dirty_delay(dsl_pool_t *dp);
170
171taskq_t *dsl_pool_vnrele_taskq(dsl_pool_t *dp);
172
173int dsl_pool_user_hold(dsl_pool_t *dp, uint64_t dsobj,
174    const char *tag, uint64_t now, dmu_tx_t *tx);
175int dsl_pool_user_release(dsl_pool_t *dp, uint64_t dsobj,
176    const char *tag, dmu_tx_t *tx);
177void dsl_pool_clean_tmp_userrefs(dsl_pool_t *dp);
178int dsl_pool_open_special_dir(dsl_pool_t *dp, const char *name, dsl_dir_t **);
179int dsl_pool_hold(const char *name, void *tag, dsl_pool_t **dp);
180void dsl_pool_rele(dsl_pool_t *dp, void *tag);
181
182void dsl_pool_create_obsolete_bpobj(dsl_pool_t *dp, dmu_tx_t *tx);
183void dsl_pool_destroy_obsolete_bpobj(dsl_pool_t *dp, dmu_tx_t *tx);
184
185#ifdef	__cplusplus
186}
187#endif
188
189#endif /* _SYS_DSL_POOL_H */
190