spa_impl.h revision fa9e4066f08beec538e775443c5be79dd423fcab
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, Version 1.0 only
6 * (the "License").  You may not use this file except in compliance
7 * with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22/*
23 * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
24 * Use is subject to license terms.
25 */
26
27#ifndef _SYS_SPA_IMPL_H
28#define	_SYS_SPA_IMPL_H
29
30#pragma ident	"%Z%%M%	%I%	%E% SMI"
31
32#include <sys/spa.h>
33#include <sys/vdev.h>
34#include <sys/metaslab.h>
35#include <sys/dmu.h>
36#include <sys/dsl_pool.h>
37#include <sys/uberblock_impl.h>
38#include <sys/zfs_context.h>
39#include <sys/avl.h>
40#include <sys/refcount.h>
41#include <sys/bplist.h>
42
43#ifdef	__cplusplus
44extern "C" {
45#endif
46
47typedef struct spa_config_lock {
48	kmutex_t	scl_lock;
49	uint64_t	scl_count;
50	kthread_t	*scl_writer;
51	kcondvar_t	scl_cv;
52} spa_config_lock_t;
53
54struct spa {
55	/*
56	 * Fields protected by spa_namespace_lock.
57	 */
58	char		*spa_name;
59	avl_node_t	spa_avl;
60	int		spa_anon;
61	nvlist_t	*spa_config;
62	uint64_t	spa_config_txg;		/* txg of last config change */
63	spa_config_lock_t spa_config_lock;	/* configuration changes */
64	kmutex_t	spa_config_cache_lock;	/* for spa_config RW_READER */
65	int		spa_sync_pass;		/* iterate-to-convergence */
66	int		spa_state;		/* pool state */
67	uint8_t		spa_minref;		/* min refcnt of open pool */
68	uint8_t		spa_traverse_wanted;	/* traverse lock wanted */
69	taskq_t		*spa_vdev_retry_taskq;
70	taskq_t		*spa_zio_issue_taskq[ZIO_TYPES];
71	taskq_t		*spa_zio_intr_taskq[ZIO_TYPES];
72	dsl_pool_t	*spa_dsl_pool;
73	metaslab_class_t *spa_normal_class;	/* normal data class */
74	uint64_t	spa_first_txg;		/* first txg after spa_open() */
75	uint64_t	spa_freeze_txg;		/* freeze pool at this txg */
76	objset_t	*spa_meta_objset;	/* copy of dp->dp_meta_objset */
77	txg_list_t	spa_vdev_txg_list;	/* per-txg dirty vdev list */
78	vdev_t		*spa_root_vdev;		/* top-level vdev container */
79	list_t		spa_dirty_list;		/* vdevs with dirty labels */
80	uint64_t	spa_config_object;	/* MOS object for pool config */
81	uint64_t	spa_syncing_txg;	/* txg currently syncing */
82	uint64_t	spa_sync_bplist_obj;	/* object for deferred frees */
83	bplist_t	spa_sync_bplist;	/* deferred-free bplist */
84	krwlock_t	spa_traverse_lock;	/* traverse vs. spa_sync() */
85	uberblock_t	spa_ubsync;		/* last synced uberblock */
86	uberblock_t	spa_uberblock;		/* current uberblock */
87	kmutex_t	spa_scrub_lock;		/* resilver/scrub lock */
88	kthread_t	*spa_scrub_thread;	/* scrub/resilver thread */
89	traverse_handle_t *spa_scrub_th;	/* scrub traverse handle */
90	uint64_t	spa_scrub_restart_txg;	/* need to restart */
91	uint64_t	spa_scrub_maxtxg;	/* max txg we'll scrub */
92	uint64_t	spa_scrub_inflight;	/* in-flight scrub I/Os */
93	uint64_t	spa_scrub_errors;	/* scrub I/O error count */
94	kcondvar_t	spa_scrub_cv;		/* scrub thread state change */
95	kcondvar_t	spa_scrub_io_cv;	/* scrub I/O completion */
96	uint8_t		spa_scrub_stop;		/* tell scrubber to stop */
97	uint8_t		spa_scrub_suspend;	/* tell scrubber to suspend */
98	uint8_t		spa_scrub_active;	/* active or suspended? */
99	uint8_t		spa_scrub_type;		/* type of scrub we're doing */
100	int		spa_sync_on;		/* sync threads are running */
101	char		*spa_root;		/* alternate root directory */
102	kmutex_t	spa_uberblock_lock;	/* vdev_uberblock_load_done() */
103	/*
104	 * spa_refcnt must be the last element because it changes size based on
105	 * compilation options.  In order for the MDB module to function
106	 * correctly, the other fields must remain in the same location.
107	 */
108	refcount_t	spa_refcount;		/* number of opens */
109};
110
111extern const char *spa_config_dir;
112extern kmutex_t spa_namespace_lock;
113
114#ifdef	__cplusplus
115}
116#endif
117
118#endif	/* _SYS_SPA_IMPL_H */
119