spa_impl.h revision 54d692b75b7a6f90ce7787309da5451f7458e66a
1fa9e406ahrens/*
2fa9e406ahrens * CDDL HEADER START
3fa9e406ahrens *
4fa9e406ahrens * The contents of this file are subject to the terms of the
5ea8dc4beschrock * Common Development and Distribution License (the "License").
6ea8dc4beschrock * You may not use this file except in compliance with the License.
7fa9e406ahrens *
8fa9e406ahrens * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9fa9e406ahrens * or http://www.opensolaris.org/os/licensing.
10fa9e406ahrens * See the License for the specific language governing permissions
11fa9e406ahrens * and limitations under the License.
12fa9e406ahrens *
13fa9e406ahrens * When distributing Covered Code, include this CDDL HEADER in each
14fa9e406ahrens * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15fa9e406ahrens * If applicable, add the following below this CDDL HEADER, with the
16fa9e406ahrens * fields enclosed by brackets "[]" replaced with your own identifying
17fa9e406ahrens * information: Portions Copyright [yyyy] [name of copyright owner]
18fa9e406ahrens *
19fa9e406ahrens * CDDL HEADER END
20fa9e406ahrens */
21fa9e406ahrens/*
2254d692bGeorge Wilson * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
23fa9e406ahrens * Use is subject to license terms.
24fa9e406ahrens */
25fa9e406ahrens
26fa9e406ahrens#ifndef _SYS_SPA_IMPL_H
27fa9e406ahrens#define	_SYS_SPA_IMPL_H
28fa9e406ahrens
29fa9e406ahrens#include <sys/spa.h>
30fa9e406ahrens#include <sys/vdev.h>
31fa9e406ahrens#include <sys/metaslab.h>
32fa9e406ahrens#include <sys/dmu.h>
33fa9e406ahrens#include <sys/dsl_pool.h>
34fa9e406ahrens#include <sys/uberblock_impl.h>
35fa9e406ahrens#include <sys/zfs_context.h>
36fa9e406ahrens#include <sys/avl.h>
37fa9e406ahrens#include <sys/refcount.h>
38fa9e406ahrens#include <sys/bplist.h>
39fa9e406ahrens
40fa9e406ahrens#ifdef	__cplusplus
41fa9e406ahrensextern "C" {
42fa9e406ahrens#endif
43fa9e406ahrens
44ea8dc4beschrocktypedef struct spa_error_entry {
45ea8dc4beschrock	zbookmark_t	se_bookmark;
46ea8dc4beschrock	char		*se_name;
47ea8dc4beschrock	avl_node_t	se_avl;
48ea8dc4beschrock} spa_error_entry_t;
49ea8dc4beschrock
5006eeb2aektypedef struct spa_history_phys {
5106eeb2aek	uint64_t sh_pool_create_len;	/* ending offset of zpool create */
5206eeb2aek	uint64_t sh_phys_max_off;	/* physical EOF */
5306eeb2aek	uint64_t sh_bof;		/* logical BOF */
5406eeb2aek	uint64_t sh_eof;		/* logical EOF */
5506eeb2aek	uint64_t sh_records_lost;	/* num of records overwritten */
5606eeb2aek} spa_history_phys_t;
5706eeb2aek
58fa94a07brendanstruct spa_aux_vdev {
59fa94a07brendan	uint64_t	sav_object;		/* MOS object for device list */
60fa94a07brendan	nvlist_t	*sav_config;		/* cached device config */
61fa94a07brendan	vdev_t		**sav_vdevs;		/* devices */
62fa94a07brendan	int		sav_count;		/* number devices */
63fa94a07brendan	boolean_t	sav_sync;		/* sync the device list */
64fa94a07brendan	nvlist_t	**sav_pending;		/* pending device additions */
65fa94a07brendan	uint_t		sav_npending;		/* # pending devices */
66fa94a07brendan};
67fa94a07brendan
68e05725bbonwicktypedef struct spa_config_lock {
69e05725bbonwick	kmutex_t	scl_lock;
70e05725bbonwick	kthread_t	*scl_writer;
71e14bb32Jeff Bonwick	int		scl_write_wanted;
72e05725bbonwick	kcondvar_t	scl_cv;
73e05725bbonwick	refcount_t	scl_count;
74e05725bbonwick} spa_config_lock_t;
75e05725bbonwick
76c5904d1eschrocktypedef struct spa_config_dirent {
77c5904d1eschrock	list_node_t	scd_link;
78c5904d1eschrock	char		*scd_path;
79c5904d1eschrock} spa_config_dirent_t;
80c5904d1eschrock
81b87f3afperrintypedef enum spa_log_state {
82b87f3afperrin	SPA_LOG_UNKNOWN = 0,	/* unknown log state */
83b87f3afperrin	SPA_LOG_MISSING,	/* missing log(s) */
84b87f3afperrin	SPA_LOG_CLEAR,		/* clear the log(s) */
85b87f3afperrin	SPA_LOG_GOOD,		/* log(s) are good */
86b87f3afperrin} spa_log_state_t;
87b87f3afperrin
88e14bb32Jeff Bonwickenum zio_taskq_type {
89e14bb32Jeff Bonwick	ZIO_TASKQ_ISSUE = 0,
90e14bb32Jeff Bonwick	ZIO_TASKQ_INTERRUPT,
91e14bb32Jeff Bonwick	ZIO_TASKQ_TYPES
92e14bb32Jeff Bonwick};
93e14bb32Jeff Bonwick
94fa9e406ahrensstruct spa {
95fa9e406ahrens	/*
96fa9e406ahrens	 * Fields protected by spa_namespace_lock.
97fa9e406ahrens	 */
98e14bb32Jeff Bonwick	char		spa_name[MAXNAMELEN];	/* pool name */
990373e76bonwick	avl_node_t	spa_avl;		/* node in spa_namespace_avl */
1000373e76bonwick	nvlist_t	*spa_config;		/* last synced config */
1010373e76bonwick	nvlist_t	*spa_config_syncing;	/* currently syncing config */
102fa9e406ahrens	uint64_t	spa_config_txg;		/* txg of last config change */
103fa9e406ahrens	int		spa_sync_pass;		/* iterate-to-convergence */
10488b7b0fMatthew Ahrens	pool_state_t	spa_state;		/* pool state */
105ea8dc4beschrock	int		spa_inject_ref;		/* injection references */
106ea8dc4beschrock	uint8_t		spa_sync_on;		/* sync threads are running */
107ea8dc4beschrock	spa_load_state_t spa_load_state;	/* current load operation */
108e14bb32Jeff Bonwick	taskq_t		*spa_zio_taskq[ZIO_TYPES][ZIO_TASKQ_TYPES];
109fa9e406ahrens	dsl_pool_t	*spa_dsl_pool;
110fa9e406ahrens	metaslab_class_t *spa_normal_class;	/* normal data class */
1118654d02perrin	metaslab_class_t *spa_log_class;	/* intent log data class */
112fa9e406ahrens	uint64_t	spa_first_txg;		/* first txg after spa_open() */
1130373e76bonwick	uint64_t	spa_final_txg;		/* txg of export/destroy */
114fa9e406ahrens	uint64_t	spa_freeze_txg;		/* freeze pool at this txg */
115fa9e406ahrens	objset_t	*spa_meta_objset;	/* copy of dp->dp_meta_objset */
116fa9e406ahrens	txg_list_t	spa_vdev_txg_list;	/* per-txg dirty vdev list */
117fa9e406ahrens	vdev_t		*spa_root_vdev;		/* top-level vdev container */
118b5989eceschrock	uint64_t	spa_load_guid;		/* initial guid for spa_load */
119e14bb32Jeff Bonwick	list_t		spa_config_dirty_list;	/* vdevs with dirty config */
120e14bb32Jeff Bonwick	list_t		spa_state_dirty_list;	/* vdevs with dirty state */
121fa94a07brendan	spa_aux_vdev_t	spa_spares;		/* hot spares */
122fa94a07brendan	spa_aux_vdev_t	spa_l2cache;		/* L2ARC cache devices */
123fa9e406ahrens	uint64_t	spa_config_object;	/* MOS object for pool config */
124fa9e406ahrens	uint64_t	spa_syncing_txg;	/* txg currently syncing */
125fa9e406ahrens	uint64_t	spa_sync_bplist_obj;	/* object for deferred frees */
126fa9e406ahrens	bplist_t	spa_sync_bplist;	/* deferred-free bplist */
127fa9e406ahrens	uberblock_t	spa_ubsync;		/* last synced uberblock */
128fa9e406ahrens	uberblock_t	spa_uberblock;		/* current uberblock */
129fa9e406ahrens	kmutex_t	spa_scrub_lock;		/* resilver/scrub lock */
130fa9e406ahrens	uint64_t	spa_scrub_inflight;	/* in-flight scrub I/Os */
13105b2b3bmishra	uint64_t	spa_scrub_maxinflight;	/* max in-flight scrub I/Os */
132fa9e406ahrens	uint64_t	spa_scrub_errors;	/* scrub I/O error count */
133fa9e406ahrens	kcondvar_t	spa_scrub_io_cv;	/* scrub I/O completion */
134fa9e406ahrens	uint8_t		spa_scrub_active;	/* active or suspended? */
135fa9e406ahrens	uint8_t		spa_scrub_type;		/* type of scrub we're doing */
1360373e76bonwick	uint8_t		spa_scrub_finished;	/* indicator to rotate logs */
137088f389ahrens	uint8_t		spa_scrub_started;	/* started since last boot */
138088f389ahrens	uint8_t		spa_scrub_reopen;	/* scrub doing vdev_reopen */
139ea8dc4beschrock	kmutex_t	spa_async_lock;		/* protect async state */
140ea8dc4beschrock	kthread_t	*spa_async_thread;	/* thread doing async task */
141ea8dc4beschrock	int		spa_async_suspended;	/* async tasks suspended */
142ea8dc4beschrock	kcondvar_t	spa_async_cv;		/* wait for thread_exit() */
143ea8dc4beschrock	uint16_t	spa_async_tasks;	/* async task mask */
144fa9e406ahrens	char		*spa_root;		/* alternate root directory */
145ea8dc4beschrock	uint64_t	spa_ena;		/* spa-wide ereport ENA */
146ea8dc4beschrock	boolean_t	spa_last_open_failed;	/* true if last open faled */
147ea8dc4beschrock	kmutex_t	spa_errlog_lock;	/* error log lock */
148ea8dc4beschrock	uint64_t	spa_errlog_last;	/* last error log object */
149ea8dc4beschrock	uint64_t	spa_errlog_scrub;	/* scrub error log object */
150ea8dc4beschrock	kmutex_t	spa_errlist_lock;	/* error list/ereport lock */
151ea8dc4beschrock	avl_tree_t	spa_errlist_last;	/* last error list */
152ea8dc4beschrock	avl_tree_t	spa_errlist_scrub;	/* scrub error list */
15399653d4eschrock	uint64_t	spa_deflate;		/* should we deflate? */
15406eeb2aek	uint64_t	spa_history;		/* history object */
15506eeb2aek	kmutex_t	spa_history_lock;	/* history lock */
15639c2341eschrock	vdev_t		*spa_pending_vdev;	/* pending vdev additions */
157b1b8ab3lling	kmutex_t	spa_props_lock;		/* property lock */
158b1b8ab3lling	uint64_t	spa_pool_props_object;	/* object for properties */
159b1b8ab3lling	uint64_t	spa_bootfs;		/* default boot filesystem */
160e14bb32Jeff Bonwick	uint64_t	spa_failmode;		/* failure mode for the pool */
161e14bb32Jeff Bonwick	uint64_t	spa_delegation;		/* delegation on/off */
162c5904d1eschrock	list_t		spa_config_list;	/* previous cache file(s) */
16354d692bGeorge Wilson	zio_t		*spa_async_zio_root;	/* root of all async I/O */
164e14bb32Jeff Bonwick	zio_t		*spa_suspend_zio_root;	/* root of all suspended I/O */
165e14bb32Jeff Bonwick	kmutex_t	spa_suspend_lock;	/* protects suspend_zio_root */
166e14bb32Jeff Bonwick	kcondvar_t	spa_suspend_cv;		/* notification of resume */
167e14bb32Jeff Bonwick	uint8_t		spa_suspended;		/* pool is suspended */
168c5904d1eschrock	boolean_t	spa_import_faulted;	/* allow faulted vdevs */
169bf82a41eschrock	boolean_t	spa_is_root;		/* pool is root */
170088f389ahrens	int		spa_minref;		/* num refs when first opened */
1718ad4d6dJeff Bonwick	int		spa_mode;		/* FREAD | FWRITE */
172b87f3afperrin	spa_log_state_t spa_log_state;		/* log state */
173fa9e406ahrens	/*
17491ebeefahrens	 * spa_refcnt & spa_config_lock must be the last elements
17591ebeefahrens	 * because refcount_t changes size based on compilation options.
17691ebeefahrens	 * In order for the MDB module to function correctly, the other
17791ebeefahrens	 * fields must remain in the same location.
178fa9e406ahrens	 */
179e14bb32Jeff Bonwick	spa_config_lock_t spa_config_lock[SCL_LOCKS]; /* config changes */
180fa9e406ahrens	refcount_t	spa_refcount;		/* number of opens */
181fa9e406ahrens};
182fa9e406ahrens
183c5904d1eschrockextern const char *spa_config_path;
184fa9e406ahrens
18515e6edfgw#define	BOOTFS_COMPRESS_VALID(compress) \
18615e6edfgw	((compress) == ZIO_COMPRESS_LZJB || \
18715e6edfgw	((compress) == ZIO_COMPRESS_ON && \
18815e6edfgw	ZIO_COMPRESS_ON_VALUE == ZIO_COMPRESS_LZJB) || \
18915e6edfgw	(compress) == ZIO_COMPRESS_OFF)
19015e6edfgw
191fa9e406ahrens#ifdef	__cplusplus
192fa9e406ahrens}
193fa9e406ahrens#endif
194fa9e406ahrens
195fa9e406ahrens#endif	/* _SYS_SPA_IMPL_H */
196