spa_impl.h revision fa9e4066f08beec538e775443c5be79dd423fcab
2fa9e406ahrens * CDDL HEADER START
3fa9e406ahrens *
4fa9e406ahrens * The contents of this file are subject to the terms of the
5fa9e406ahrens * Common Development and Distribution License, Version 1.0 only
6fa9e406ahrens * (the "License").  You may not use this file except in compliance
7fa9e406ahrens * with the License.
8fa9e406ahrens *
9fa9e406ahrens * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10fa9e406ahrens * or
11fa9e406ahrens * See the License for the specific language governing permissions
12fa9e406ahrens * and limitations under the License.
13fa9e406ahrens *
14fa9e406ahrens * When distributing Covered Code, include this CDDL HEADER in each
15fa9e406ahrens * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16fa9e406ahrens * If applicable, add the following below this CDDL HEADER, with the
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20fa9e406ahrens * CDDL HEADER END
21fa9e406ahrens */
23fa9e406ahrens * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
24fa9e406ahrens * Use is subject to license terms.
25fa9e406ahrens */
27fa9e406ahrens#ifndef _SYS_SPA_IMPL_H
28fa9e406ahrens#define	_SYS_SPA_IMPL_H
30fa9e406ahrens#pragma ident	"%Z%%M%	%I%	%E% SMI"
32fa9e406ahrens#include <sys/spa.h>
33fa9e406ahrens#include <sys/vdev.h>
34fa9e406ahrens#include <sys/metaslab.h>
35fa9e406ahrens#include <sys/dmu.h>
36fa9e406ahrens#include <sys/dsl_pool.h>
37fa9e406ahrens#include <sys/uberblock_impl.h>
38fa9e406ahrens#include <sys/zfs_context.h>
39fa9e406ahrens#include <sys/avl.h>
40fa9e406ahrens#include <sys/refcount.h>
41fa9e406ahrens#include <sys/bplist.h>
43fa9e406ahrens#ifdef	__cplusplus
44fa9e406ahrensextern "C" {
47fa9e406ahrenstypedef struct spa_config_lock {
48fa9e406ahrens	kmutex_t	scl_lock;
49fa9e406ahrens	uint64_t	scl_count;
50fa9e406ahrens	kthread_t	*scl_writer;
51fa9e406ahrens	kcondvar_t	scl_cv;
52fa9e406ahrens} spa_config_lock_t;
54fa9e406ahrensstruct spa {
55fa9e406ahrens	/*
56fa9e406ahrens	 * Fields protected by spa_namespace_lock.
57fa9e406ahrens	 */
58fa9e406ahrens	char		*spa_name;
59fa9e406ahrens	avl_node_t	spa_avl;
60fa9e406ahrens	int		spa_anon;
61fa9e406ahrens	nvlist_t	*spa_config;
62fa9e406ahrens	uint64_t	spa_config_txg;		/* txg of last config change */
63fa9e406ahrens	spa_config_lock_t spa_config_lock;	/* configuration changes */
64fa9e406ahrens	kmutex_t	spa_config_cache_lock;	/* for spa_config RW_READER */
65fa9e406ahrens	int		spa_sync_pass;		/* iterate-to-convergence */
66fa9e406ahrens	int		spa_state;		/* pool state */
67fa9e406ahrens	uint8_t		spa_minref;		/* min refcnt of open pool */
68fa9e406ahrens	uint8_t		spa_traverse_wanted;	/* traverse lock wanted */
69fa9e406ahrens	taskq_t		*spa_vdev_retry_taskq;
70fa9e406ahrens	taskq_t		*spa_zio_issue_taskq[ZIO_TYPES];
71fa9e406ahrens	taskq_t		*spa_zio_intr_taskq[ZIO_TYPES];
72fa9e406ahrens	dsl_pool_t	*spa_dsl_pool;
73fa9e406ahrens	metaslab_class_t *spa_normal_class;	/* normal data class */
74fa9e406ahrens	uint64_t	spa_first_txg;		/* first txg after spa_open() */
75fa9e406ahrens	uint64_t	spa_freeze_txg;		/* freeze pool at this txg */
76fa9e406ahrens	objset_t	*spa_meta_objset;	/* copy of dp->dp_meta_objset */
77fa9e406ahrens	txg_list_t	spa_vdev_txg_list;	/* per-txg dirty vdev list */
78fa9e406ahrens	vdev_t		*spa_root_vdev;		/* top-level vdev container */
79fa9e406ahrens	list_t		spa_dirty_list;		/* vdevs with dirty labels */
80fa9e406ahrens	uint64_t	spa_config_object;	/* MOS object for pool config */
81fa9e406ahrens	uint64_t	spa_syncing_txg;	/* txg currently syncing */
82fa9e406ahrens	uint64_t	spa_sync_bplist_obj;	/* object for deferred frees */
83fa9e406ahrens	bplist_t	spa_sync_bplist;	/* deferred-free bplist */
84fa9e406ahrens	krwlock_t	spa_traverse_lock;	/* traverse vs. spa_sync() */
85fa9e406ahrens	uberblock_t	spa_ubsync;		/* last synced uberblock */
86fa9e406ahrens	uberblock_t	spa_uberblock;		/* current uberblock */
87fa9e406ahrens	kmutex_t	spa_scrub_lock;		/* resilver/scrub lock */
88fa9e406ahrens	kthread_t	*spa_scrub_thread;	/* scrub/resilver thread */
89fa9e406ahrens	traverse_handle_t *spa_scrub_th;	/* scrub traverse handle */
90fa9e406ahrens	uint64_t	spa_scrub_restart_txg;	/* need to restart */
91fa9e406ahrens	uint64_t	spa_scrub_maxtxg;	/* max txg we'll scrub */
92fa9e406ahrens	uint64_t	spa_scrub_inflight;	/* in-flight scrub I/Os */
93fa9e406ahrens	uint64_t	spa_scrub_errors;	/* scrub I/O error count */
94fa9e406ahrens	kcondvar_t	spa_scrub_cv;		/* scrub thread state change */
95fa9e406ahrens	kcondvar_t	spa_scrub_io_cv;	/* scrub I/O completion */
96fa9e406ahrens	uint8_t		spa_scrub_stop;		/* tell scrubber to stop */
97fa9e406ahrens	uint8_t		spa_scrub_suspend;	/* tell scrubber to suspend */
98fa9e406ahrens	uint8_t		spa_scrub_active;	/* active or suspended? */
99fa9e406ahrens	uint8_t		spa_scrub_type;		/* type of scrub we're doing */
100fa9e406ahrens	int		spa_sync_on;		/* sync threads are running */
101fa9e406ahrens	char		*spa_root;		/* alternate root directory */
102fa9e406ahrens	kmutex_t	spa_uberblock_lock;	/* vdev_uberblock_load_done() */
103fa9e406ahrens	/*
104fa9e406ahrens	 * spa_refcnt must be the last element because it changes size based on
105fa9e406ahrens	 * compilation options.  In order for the MDB module to function
106fa9e406ahrens	 * correctly, the other fields must remain in the same location.
107fa9e406ahrens	 */
108fa9e406ahrens	refcount_t	spa_refcount;		/* number of opens */
111fa9e406ahrensextern const char *spa_config_dir;
112fa9e406ahrensextern kmutex_t spa_namespace_lock;
114fa9e406ahrens#ifdef	__cplusplus
118fa9e406ahrens#endif	/* _SYS_SPA_IMPL_H */