xref: /illumos-gate/usr/src/uts/common/fs/zfs/sys/spa_impl.h (revision 88b7b0f29b20b808b9e06071885b1d6a3ddb6328)
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 2008 Sun Microsystems, Inc.  All rights reserved.
23  * Use is subject to license terms.
24  */
25 
26 #ifndef _SYS_SPA_IMPL_H
27 #define	_SYS_SPA_IMPL_H
28 
29 #include <sys/spa.h>
30 #include <sys/vdev.h>
31 #include <sys/metaslab.h>
32 #include <sys/dmu.h>
33 #include <sys/dsl_pool.h>
34 #include <sys/uberblock_impl.h>
35 #include <sys/zfs_context.h>
36 #include <sys/avl.h>
37 #include <sys/refcount.h>
38 #include <sys/bplist.h>
39 
40 #ifdef	__cplusplus
41 extern "C" {
42 #endif
43 
44 typedef struct spa_error_entry {
45 	zbookmark_t	se_bookmark;
46 	char		*se_name;
47 	avl_node_t	se_avl;
48 } spa_error_entry_t;
49 
50 typedef struct spa_history_phys {
51 	uint64_t sh_pool_create_len;	/* ending offset of zpool create */
52 	uint64_t sh_phys_max_off;	/* physical EOF */
53 	uint64_t sh_bof;		/* logical BOF */
54 	uint64_t sh_eof;		/* logical EOF */
55 	uint64_t sh_records_lost;	/* num of records overwritten */
56 } spa_history_phys_t;
57 
58 struct spa_aux_vdev {
59 	uint64_t	sav_object;		/* MOS object for device list */
60 	nvlist_t	*sav_config;		/* cached device config */
61 	vdev_t		**sav_vdevs;		/* devices */
62 	int		sav_count;		/* number devices */
63 	boolean_t	sav_sync;		/* sync the device list */
64 	nvlist_t	**sav_pending;		/* pending device additions */
65 	uint_t		sav_npending;		/* # pending devices */
66 };
67 
68 typedef struct spa_config_lock {
69 	kmutex_t	scl_lock;
70 	kthread_t	*scl_writer;
71 	int		scl_write_wanted;
72 	kcondvar_t	scl_cv;
73 	refcount_t	scl_count;
74 } spa_config_lock_t;
75 
76 typedef struct spa_config_dirent {
77 	list_node_t	scd_link;
78 	char		*scd_path;
79 } spa_config_dirent_t;
80 
81 typedef enum spa_log_state {
82 	SPA_LOG_UNKNOWN = 0,	/* unknown log state */
83 	SPA_LOG_MISSING,	/* missing log(s) */
84 	SPA_LOG_CLEAR,		/* clear the log(s) */
85 	SPA_LOG_GOOD,		/* log(s) are good */
86 } spa_log_state_t;
87 
88 enum zio_taskq_type {
89 	ZIO_TASKQ_ISSUE = 0,
90 	ZIO_TASKQ_INTERRUPT,
91 	ZIO_TASKQ_TYPES
92 };
93 
94 struct spa {
95 	/*
96 	 * Fields protected by spa_namespace_lock.
97 	 */
98 	char		spa_name[MAXNAMELEN];	/* pool name */
99 	avl_node_t	spa_avl;		/* node in spa_namespace_avl */
100 	nvlist_t	*spa_config;		/* last synced config */
101 	nvlist_t	*spa_config_syncing;	/* currently syncing config */
102 	uint64_t	spa_config_txg;		/* txg of last config change */
103 	int		spa_sync_pass;		/* iterate-to-convergence */
104 	pool_state_t	spa_state;		/* pool state */
105 	int		spa_inject_ref;		/* injection references */
106 	uint8_t		spa_sync_on;		/* sync threads are running */
107 	spa_load_state_t spa_load_state;	/* current load operation */
108 	taskq_t		*spa_zio_taskq[ZIO_TYPES][ZIO_TASKQ_TYPES];
109 	dsl_pool_t	*spa_dsl_pool;
110 	metaslab_class_t *spa_normal_class;	/* normal data class */
111 	metaslab_class_t *spa_log_class;	/* intent log data class */
112 	uint64_t	spa_first_txg;		/* first txg after spa_open() */
113 	uint64_t	spa_final_txg;		/* txg of export/destroy */
114 	uint64_t	spa_freeze_txg;		/* freeze pool at this txg */
115 	objset_t	*spa_meta_objset;	/* copy of dp->dp_meta_objset */
116 	txg_list_t	spa_vdev_txg_list;	/* per-txg dirty vdev list */
117 	vdev_t		*spa_root_vdev;		/* top-level vdev container */
118 	uint64_t	spa_load_guid;		/* initial guid for spa_load */
119 	list_t		spa_config_dirty_list;	/* vdevs with dirty config */
120 	list_t		spa_state_dirty_list;	/* vdevs with dirty state */
121 	spa_aux_vdev_t	spa_spares;		/* hot spares */
122 	spa_aux_vdev_t	spa_l2cache;		/* L2ARC cache devices */
123 	uint64_t	spa_config_object;	/* MOS object for pool config */
124 	uint64_t	spa_syncing_txg;	/* txg currently syncing */
125 	uint64_t	spa_sync_bplist_obj;	/* object for deferred frees */
126 	bplist_t	spa_sync_bplist;	/* deferred-free bplist */
127 	uberblock_t	spa_ubsync;		/* last synced uberblock */
128 	uberblock_t	spa_uberblock;		/* current uberblock */
129 	kmutex_t	spa_scrub_lock;		/* resilver/scrub lock */
130 	uint64_t	spa_scrub_inflight;	/* in-flight scrub I/Os */
131 	uint64_t	spa_scrub_maxinflight;	/* max in-flight scrub I/Os */
132 	uint64_t	spa_scrub_errors;	/* scrub I/O error count */
133 	kcondvar_t	spa_scrub_io_cv;	/* scrub I/O completion */
134 	uint8_t		spa_scrub_active;	/* active or suspended? */
135 	uint8_t		spa_scrub_type;		/* type of scrub we're doing */
136 	uint8_t		spa_scrub_finished;	/* indicator to rotate logs */
137 	uint8_t		spa_scrub_started;	/* started since last boot */
138 	uint8_t		spa_scrub_reopen;	/* scrub doing vdev_reopen */
139 	kmutex_t	spa_async_lock;		/* protect async state */
140 	kthread_t	*spa_async_thread;	/* thread doing async task */
141 	int		spa_async_suspended;	/* async tasks suspended */
142 	kcondvar_t	spa_async_cv;		/* wait for thread_exit() */
143 	uint16_t	spa_async_tasks;	/* async task mask */
144 	kmutex_t	spa_async_root_lock;	/* protects async root count */
145 	uint64_t	spa_async_root_count;	/* number of async root zios */
146 	kcondvar_t	spa_async_root_cv;	/* notify when count == 0 */
147 	char		*spa_root;		/* alternate root directory */
148 	uint64_t	spa_ena;		/* spa-wide ereport ENA */
149 	boolean_t	spa_last_open_failed;	/* true if last open faled */
150 	kmutex_t	spa_errlog_lock;	/* error log lock */
151 	uint64_t	spa_errlog_last;	/* last error log object */
152 	uint64_t	spa_errlog_scrub;	/* scrub error log object */
153 	kmutex_t	spa_errlist_lock;	/* error list/ereport lock */
154 	avl_tree_t	spa_errlist_last;	/* last error list */
155 	avl_tree_t	spa_errlist_scrub;	/* scrub error list */
156 	uint64_t	spa_deflate;		/* should we deflate? */
157 	uint64_t	spa_history;		/* history object */
158 	kmutex_t	spa_history_lock;	/* history lock */
159 	vdev_t		*spa_pending_vdev;	/* pending vdev additions */
160 	kmutex_t	spa_props_lock;		/* property lock */
161 	uint64_t	spa_pool_props_object;	/* object for properties */
162 	uint64_t	spa_bootfs;		/* default boot filesystem */
163 	uint64_t	spa_failmode;		/* failure mode for the pool */
164 	uint64_t	spa_delegation;		/* delegation on/off */
165 	list_t		spa_config_list;	/* previous cache file(s) */
166 	zio_t		*spa_suspend_zio_root;	/* root of all suspended I/O */
167 	kmutex_t	spa_suspend_lock;	/* protects suspend_zio_root */
168 	kcondvar_t	spa_suspend_cv;		/* notification of resume */
169 	uint8_t		spa_suspended;		/* pool is suspended */
170 	boolean_t	spa_import_faulted;	/* allow faulted vdevs */
171 	boolean_t	spa_is_root;		/* pool is root */
172 	int		spa_minref;		/* num refs when first opened */
173 	spa_log_state_t spa_log_state;		/* log state */
174 	/*
175 	 * spa_refcnt & spa_config_lock must be the last elements
176 	 * because refcount_t changes size based on compilation options.
177 	 * In order for the MDB module to function correctly, the other
178 	 * fields must remain in the same location.
179 	 */
180 	spa_config_lock_t spa_config_lock[SCL_LOCKS]; /* config changes */
181 	refcount_t	spa_refcount;		/* number of opens */
182 };
183 
184 extern const char *spa_config_path;
185 
186 #define	BOOTFS_COMPRESS_VALID(compress) \
187 	((compress) == ZIO_COMPRESS_LZJB || \
188 	((compress) == ZIO_COMPRESS_ON && \
189 	ZIO_COMPRESS_ON_VALUE == ZIO_COMPRESS_LZJB) || \
190 	(compress) == ZIO_COMPRESS_OFF)
191 
192 #ifdef	__cplusplus
193 }
194 #endif
195 
196 #endif	/* _SYS_SPA_IMPL_H */
197