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 */
24
25#ifndef	_SYS_DSL_POOL_H
26#define	_SYS_DSL_POOL_H
27
28#include <sys/spa.h>
29#include <sys/txg.h>
30#include <sys/txg_impl.h>
31#include <sys/zfs_context.h>
32#include <sys/zio.h>
33#include <sys/dnode.h>
34#include <sys/ddt.h>
35#include <sys/arc.h>
36#include <sys/bpobj.h>
37
38#ifdef	__cplusplus
39extern "C" {
40#endif
41
42struct objset;
43struct dsl_dir;
44struct dsl_dataset;
45struct dsl_pool;
46struct dmu_tx;
47struct dsl_scan;
48
49/* These macros are for indexing into the zfs_all_blkstats_t. */
50#define	DMU_OT_DEFERRED	DMU_OT_NONE
51#define	DMU_OT_TOTAL	DMU_OT_NUMTYPES
52
53typedef struct zfs_blkstat {
54	uint64_t	zb_count;
55	uint64_t	zb_asize;
56	uint64_t	zb_lsize;
57	uint64_t	zb_psize;
58	uint64_t	zb_gangs;
59	uint64_t	zb_ditto_2_of_2_samevdev;
60	uint64_t	zb_ditto_2_of_3_samevdev;
61	uint64_t	zb_ditto_3_of_3_samevdev;
62} zfs_blkstat_t;
63
64typedef struct zfs_all_blkstats {
65	zfs_blkstat_t	zab_type[DN_MAX_LEVELS + 1][DMU_OT_TOTAL + 1];
66} zfs_all_blkstats_t;
67
68
69typedef struct dsl_pool {
70	/* Immutable */
71	spa_t *dp_spa;
72	struct objset *dp_meta_objset;
73	struct dsl_dir *dp_root_dir;
74	struct dsl_dir *dp_mos_dir;
75	struct dsl_dir *dp_free_dir;
76	struct dsl_dataset *dp_origin_snap;
77	uint64_t dp_root_dir_obj;
78	struct taskq *dp_vnrele_taskq;
79
80	/* No lock needed - sync context only */
81	blkptr_t dp_meta_rootbp;
82	list_t dp_synced_datasets;
83	hrtime_t dp_read_overhead;
84	uint64_t dp_throughput; /* bytes per millisec */
85	uint64_t dp_write_limit;
86	uint64_t dp_tmp_userrefs_obj;
87	bpobj_t dp_free_bpobj;
88
89	struct dsl_scan *dp_scan;
90
91	/* Uses dp_lock */
92	kmutex_t dp_lock;
93	uint64_t dp_space_towrite[TXG_SIZE];
94	uint64_t dp_tempreserved[TXG_SIZE];
95
96	/* Has its own locking */
97	tx_state_t dp_tx;
98	txg_list_t dp_dirty_datasets;
99	txg_list_t dp_dirty_dirs;
100	txg_list_t dp_sync_tasks;
101
102	/*
103	 * Protects administrative changes (properties, namespace)
104	 * It is only held for write in syncing context.  Therefore
105	 * syncing context does not need to ever have it for read, since
106	 * nobody else could possibly have it for write.
107	 */
108	krwlock_t dp_config_rwlock;
109
110	zfs_all_blkstats_t *dp_blkstats;
111} dsl_pool_t;
112
113int dsl_pool_open(spa_t *spa, uint64_t txg, dsl_pool_t **dpp);
114void dsl_pool_close(dsl_pool_t *dp);
115dsl_pool_t *dsl_pool_create(spa_t *spa, nvlist_t *zplprops, uint64_t txg);
116void dsl_pool_sync(dsl_pool_t *dp, uint64_t txg);
117void dsl_pool_sync_done(dsl_pool_t *dp, uint64_t txg);
118int dsl_pool_sync_context(dsl_pool_t *dp);
119uint64_t dsl_pool_adjustedsize(dsl_pool_t *dp, boolean_t netfree);
120uint64_t dsl_pool_adjustedfree(dsl_pool_t *dp, boolean_t netfree);
121int dsl_pool_tempreserve_space(dsl_pool_t *dp, uint64_t space, dmu_tx_t *tx);
122void dsl_pool_tempreserve_clear(dsl_pool_t *dp, int64_t space, dmu_tx_t *tx);
123void dsl_pool_memory_pressure(dsl_pool_t *dp);
124void dsl_pool_willuse_space(dsl_pool_t *dp, int64_t space, dmu_tx_t *tx);
125void dsl_free(dsl_pool_t *dp, uint64_t txg, const blkptr_t *bpp);
126void dsl_free_sync(zio_t *pio, dsl_pool_t *dp, uint64_t txg,
127    const blkptr_t *bpp);
128int dsl_read(zio_t *pio, spa_t *spa, const blkptr_t *bpp, arc_buf_t *pbuf,
129    arc_done_func_t *done, void *private, int priority, int zio_flags,
130    uint32_t *arc_flags, const zbookmark_t *zb);
131int dsl_read_nolock(zio_t *pio, spa_t *spa, const blkptr_t *bpp,
132    arc_done_func_t *done, void *private, int priority, int zio_flags,
133    uint32_t *arc_flags, const zbookmark_t *zb);
134void dsl_pool_create_origin(dsl_pool_t *dp, dmu_tx_t *tx);
135void dsl_pool_upgrade_clones(dsl_pool_t *dp, dmu_tx_t *tx);
136void dsl_pool_upgrade_dir_clones(dsl_pool_t *dp, dmu_tx_t *tx);
137
138taskq_t *dsl_pool_vnrele_taskq(dsl_pool_t *dp);
139
140extern int dsl_pool_user_hold(dsl_pool_t *dp, uint64_t dsobj,
141    const char *tag, uint64_t *now, dmu_tx_t *tx);
142extern int dsl_pool_user_release(dsl_pool_t *dp, uint64_t dsobj,
143    const char *tag, dmu_tx_t *tx);
144extern void dsl_pool_clean_tmp_userrefs(dsl_pool_t *dp);
145int dsl_pool_open_special_dir(dsl_pool_t *dp, const char *name, dsl_dir_t **);
146
147#ifdef	__cplusplus
148}
149#endif
150
151#endif /* _SYS_DSL_POOL_H */
152