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#include <sys/mmp.h>
43
44#ifdef	__cplusplus
45extern "C" {
46#endif
47
48struct objset;
49struct dsl_dir;
50struct dsl_dataset;
51struct dsl_pool;
52struct dmu_tx;
53struct dsl_scan;
54struct dsl_crypto_params;
55
56extern uint64_t zfs_dirty_data_max;
57extern uint64_t zfs_dirty_data_max_max;
58extern uint64_t zfs_dirty_data_sync_pct;
59extern int zfs_dirty_data_max_percent;
60extern int zfs_delay_min_dirty_percent;
61extern uint64_t zfs_delay_scale;
62
63/* These macros are for indexing into the zfs_all_blkstats_t. */
64#define	DMU_OT_DEFERRED	DMU_OT_NONE
65#define	DMU_OT_OTHER	DMU_OT_NUMTYPES /* place holder for DMU_OT() types */
66#define	DMU_OT_TOTAL	(DMU_OT_NUMTYPES + 1)
67
68typedef struct zfs_blkstat {
69	uint64_t	zb_count;
70	uint64_t	zb_asize;
71	uint64_t	zb_lsize;
72	uint64_t	zb_psize;
73	uint64_t	zb_gangs;
74	uint64_t	zb_ditto_2_of_2_samevdev;
75	uint64_t	zb_ditto_2_of_3_samevdev;
76	uint64_t	zb_ditto_3_of_3_samevdev;
77} zfs_blkstat_t;
78
79typedef struct zfs_all_blkstats {
80	zfs_blkstat_t	zab_type[DN_MAX_LEVELS + 1][DMU_OT_TOTAL + 1];
81	kmutex_t	zab_lock;
82} zfs_all_blkstats_t;
83
84
85typedef struct dsl_pool {
86	/* Immutable */
87	spa_t *dp_spa;
88	struct objset *dp_meta_objset;
89	struct dsl_dir *dp_root_dir;
90	struct dsl_dir *dp_mos_dir;
91	struct dsl_dir *dp_free_dir;
92	struct dsl_dir *dp_leak_dir;
93	struct dsl_dataset *dp_origin_snap;
94	uint64_t dp_root_dir_obj;
95	taskq_t *dp_vnrele_taskq;
96	struct taskq *dp_unlinked_drain_taskq;
97
98	/* No lock needed - sync context only */
99	blkptr_t dp_meta_rootbp;
100	uint64_t dp_tmp_userrefs_obj;
101	bpobj_t dp_free_bpobj;
102	uint64_t dp_bptree_obj;
103	uint64_t dp_empty_bpobj;
104	bpobj_t dp_obsolete_bpobj;
105
106	struct dsl_scan *dp_scan;
107
108	/* Uses dp_lock */
109	kmutex_t dp_lock;
110	kcondvar_t dp_spaceavail_cv;
111	uint64_t dp_dirty_pertxg[TXG_SIZE];
112	uint64_t dp_dirty_total;
113	uint64_t dp_long_free_dirty_pertxg[TXG_SIZE];
114	uint64_t dp_mos_used_delta;
115	uint64_t dp_mos_compressed_delta;
116	uint64_t dp_mos_uncompressed_delta;
117
118	/*
119	 * Time of most recently scheduled (furthest in the future)
120	 * wakeup for delayed transactions.
121	 */
122	hrtime_t dp_last_wakeup;
123
124	/* Has its own locking */
125	tx_state_t dp_tx;
126	txg_list_t dp_dirty_datasets;
127	txg_list_t dp_dirty_zilogs;
128	txg_list_t dp_dirty_dirs;
129	txg_list_t dp_sync_tasks;
130	txg_list_t dp_early_sync_tasks;
131	taskq_t *dp_sync_taskq;
132	taskq_t *dp_zil_clean_taskq;
133
134	/*
135	 * Protects administrative changes (properties, namespace)
136	 *
137	 * It is only held for write in syncing context.  Therefore
138	 * syncing context does not need to ever have it for read, since
139	 * nobody else could possibly have it for write.
140	 */
141	rrwlock_t dp_config_rwlock;
142
143	zfs_all_blkstats_t *dp_blkstats;
144} dsl_pool_t;
145
146int dsl_pool_init(spa_t *spa, uint64_t txg, dsl_pool_t **dpp);
147int dsl_pool_open(dsl_pool_t *dp);
148void dsl_pool_close(dsl_pool_t *dp);
149dsl_pool_t *dsl_pool_create(spa_t *spa, nvlist_t *zplprops,
150    struct dsl_crypto_params *dcp, uint64_t txg);
151void dsl_pool_sync(dsl_pool_t *dp, uint64_t txg);
152void dsl_pool_sync_done(dsl_pool_t *dp, uint64_t txg);
153int dsl_pool_sync_context(dsl_pool_t *dp);
154uint64_t dsl_pool_adjustedsize(dsl_pool_t *dp, zfs_space_check_t slop_policy);
155uint64_t dsl_pool_unreserved_space(dsl_pool_t *dp,
156    zfs_space_check_t slop_policy);
157void dsl_pool_dirty_space(dsl_pool_t *dp, int64_t space, dmu_tx_t *tx);
158void dsl_pool_undirty_space(dsl_pool_t *dp, int64_t space, uint64_t txg);
159void dsl_free(dsl_pool_t *dp, uint64_t txg, const blkptr_t *bpp);
160void dsl_free_sync(zio_t *pio, dsl_pool_t *dp, uint64_t txg,
161    const blkptr_t *bpp);
162void dsl_pool_create_origin(dsl_pool_t *dp, dmu_tx_t *tx);
163void dsl_pool_upgrade_clones(dsl_pool_t *dp, dmu_tx_t *tx);
164void dsl_pool_upgrade_dir_clones(dsl_pool_t *dp, dmu_tx_t *tx);
165void dsl_pool_mos_diduse_space(dsl_pool_t *dp,
166    int64_t used, int64_t comp, int64_t uncomp);
167void dsl_pool_ckpoint_diduse_space(dsl_pool_t *dp,
168    int64_t used, int64_t comp, int64_t uncomp);
169void dsl_pool_config_enter(dsl_pool_t *dp, void *tag);
170void dsl_pool_config_enter_prio(dsl_pool_t *dp, void *tag);
171void dsl_pool_config_exit(dsl_pool_t *dp, void *tag);
172boolean_t dsl_pool_config_held(dsl_pool_t *dp);
173boolean_t dsl_pool_config_held_writer(dsl_pool_t *dp);
174boolean_t dsl_pool_need_dirty_delay(dsl_pool_t *dp);
175
176taskq_t *dsl_pool_vnrele_taskq(dsl_pool_t *dp);
177taskq_t *dsl_pool_unlinked_drain_taskq(dsl_pool_t *dp);
178
179int dsl_pool_user_hold(dsl_pool_t *dp, uint64_t dsobj,
180    const char *tag, uint64_t now, dmu_tx_t *tx);
181int dsl_pool_user_release(dsl_pool_t *dp, uint64_t dsobj,
182    const char *tag, dmu_tx_t *tx);
183void dsl_pool_clean_tmp_userrefs(dsl_pool_t *dp);
184int dsl_pool_open_special_dir(dsl_pool_t *dp, const char *name, dsl_dir_t **);
185int dsl_pool_hold(const char *name, void *tag, dsl_pool_t **dp);
186void dsl_pool_rele(dsl_pool_t *dp, void *tag);
187
188void dsl_pool_create_obsolete_bpobj(dsl_pool_t *dp, dmu_tx_t *tx);
189void dsl_pool_destroy_obsolete_bpobj(dsl_pool_t *dp, dmu_tx_t *tx);
190
191#ifdef	__cplusplus
192}
193#endif
194
195#endif /* _SYS_DSL_POOL_H */
196