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      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 2007 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 #pragma ident	"@(#)spa_impl.h	1.17	07/11/27 SMI"
     30 
     31 #include <sys/spa.h>
     32 #include <sys/vdev.h>
     33 #include <sys/metaslab.h>
     34 #include <sys/dmu.h>
     35 #include <sys/dsl_pool.h>
     36 #include <sys/uberblock_impl.h>
     37 #include <sys/zfs_context.h>
     38 #include <sys/avl.h>
     39 #include <sys/refcount.h>
     40 #include <sys/bplist.h>
     41 
     42 #ifdef	__cplusplus
     43 extern "C" {
     44 #endif
     45 
     46 typedef struct spa_error_entry {
     47 	zbookmark_t	se_bookmark;
     48 	char		*se_name;
     49 	avl_node_t	se_avl;
     50 } spa_error_entry_t;
     51 
     52 typedef struct spa_history_phys {
     53 	uint64_t sh_pool_create_len;	/* ending offset of zpool create */
     54 	uint64_t sh_phys_max_off;	/* physical EOF */
     55 	uint64_t sh_bof;		/* logical BOF */
     56 	uint64_t sh_eof;		/* logical EOF */
     57 	uint64_t sh_records_lost;	/* num of records overwritten */
     58 } spa_history_phys_t;
     59 
     60 struct spa_aux_vdev {
     61 	uint64_t	sav_object;		/* MOS object for device list */
     62 	nvlist_t	*sav_config;		/* cached device config */
     63 	vdev_t		**sav_vdevs;		/* devices */
     64 	int		sav_count;		/* number devices */
     65 	boolean_t	sav_sync;		/* sync the device list */
     66 	nvlist_t	**sav_pending;		/* pending device additions */
     67 	uint_t		sav_npending;		/* # pending devices */
     68 };
     69 
     70 typedef struct spa_config_lock {
     71 	kmutex_t	scl_lock;
     72 	kthread_t	*scl_writer;
     73 	uint16_t	scl_write_wanted;
     74 	kcondvar_t	scl_cv;
     75 	refcount_t	scl_count;
     76 } spa_config_lock_t;
     77 
     78 struct spa {
     79 	/*
     80 	 * Fields protected by spa_namespace_lock.
     81 	 */
     82 	char		*spa_name;		/* pool name */
     83 	avl_node_t	spa_avl;		/* node in spa_namespace_avl */
     84 	nvlist_t	*spa_config;		/* last synced config */
     85 	nvlist_t	*spa_config_syncing;	/* currently syncing config */
     86 	uint64_t	spa_config_txg;		/* txg of last config change */
     87 	kmutex_t	spa_config_cache_lock;	/* for spa_config RW_READER */
     88 	int		spa_sync_pass;		/* iterate-to-convergence */
     89 	int		spa_state;		/* pool state */
     90 	int		spa_inject_ref;		/* injection references */
     91 	uint8_t		spa_traverse_wanted;	/* traverse lock wanted */
     92 	uint8_t		spa_sync_on;		/* sync threads are running */
     93 	spa_load_state_t spa_load_state;	/* current load operation */
     94 	taskq_t		*spa_zio_issue_taskq[ZIO_TYPES];
     95 	taskq_t		*spa_zio_intr_taskq[ZIO_TYPES];
     96 	dsl_pool_t	*spa_dsl_pool;
     97 	metaslab_class_t *spa_normal_class;	/* normal data class */
     98 	metaslab_class_t *spa_log_class;	/* intent log data class */
     99 	uint64_t	spa_first_txg;		/* first txg after spa_open() */
    100 	uint64_t	spa_final_txg;		/* txg of export/destroy */
    101 	uint64_t	spa_freeze_txg;		/* freeze pool at this txg */
    102 	objset_t	*spa_meta_objset;	/* copy of dp->dp_meta_objset */
    103 	txg_list_t	spa_vdev_txg_list;	/* per-txg dirty vdev list */
    104 	vdev_t		*spa_root_vdev;		/* top-level vdev container */
    105 	uint64_t	spa_load_guid;		/* initial guid for spa_load */
    106 	list_t		spa_dirty_list;		/* vdevs with dirty labels */
    107 	spa_aux_vdev_t	spa_spares;		/* hot spares */
    108 	spa_aux_vdev_t	spa_l2cache;		/* L2ARC cache devices */
    109 	uint64_t	spa_config_object;	/* MOS object for pool config */
    110 	uint64_t	spa_syncing_txg;	/* txg currently syncing */
    111 	uint64_t	spa_sync_bplist_obj;	/* object for deferred frees */
    112 	bplist_t	spa_sync_bplist;	/* deferred-free bplist */
    113 	krwlock_t	spa_traverse_lock;	/* traverse vs. spa_sync() */
    114 	uberblock_t	spa_ubsync;		/* last synced uberblock */
    115 	uberblock_t	spa_uberblock;		/* current uberblock */
    116 	kmutex_t	spa_scrub_lock;		/* resilver/scrub lock */
    117 	kthread_t	*spa_scrub_thread;	/* scrub/resilver thread */
    118 	traverse_handle_t *spa_scrub_th;	/* scrub traverse handle */
    119 	uint64_t	spa_scrub_restart_txg;	/* need to restart */
    120 	uint64_t	spa_scrub_mintxg;	/* min txg we'll scrub */
    121 	uint64_t	spa_scrub_maxtxg;	/* max txg we'll scrub */
    122 	uint64_t	spa_scrub_inflight;	/* in-flight scrub I/Os */
    123 	uint64_t	spa_scrub_maxinflight;	/* max in-flight scrub I/Os */
    124 	uint64_t	spa_scrub_errors;	/* scrub I/O error count */
    125 	int		spa_scrub_suspended;	/* tell scrubber to suspend */
    126 	kcondvar_t	spa_scrub_cv;		/* scrub thread state change */
    127 	kcondvar_t	spa_scrub_io_cv;	/* scrub I/O completion */
    128 	uint8_t		spa_scrub_stop;		/* tell scrubber to stop */
    129 	uint8_t		spa_scrub_active;	/* active or suspended? */
    130 	uint8_t		spa_scrub_type;		/* type of scrub we're doing */
    131 	uint8_t		spa_scrub_finished;	/* indicator to rotate logs */
    132 	kmutex_t	spa_async_lock;		/* protect async state */
    133 	kthread_t	*spa_async_thread;	/* thread doing async task */
    134 	int		spa_async_suspended;	/* async tasks suspended */
    135 	kcondvar_t	spa_async_cv;		/* wait for thread_exit() */
    136 	uint16_t	spa_async_tasks;	/* async task mask */
    137 	char		*spa_root;		/* alternate root directory */
    138 	kmutex_t	spa_uberblock_lock;	/* vdev_uberblock_load_done() */
    139 	uint64_t	spa_ena;		/* spa-wide ereport ENA */
    140 	boolean_t	spa_last_open_failed;	/* true if last open faled */
    141 	kmutex_t	spa_errlog_lock;	/* error log lock */
    142 	uint64_t	spa_errlog_last;	/* last error log object */
    143 	uint64_t	spa_errlog_scrub;	/* scrub error log object */
    144 	kmutex_t	spa_errlist_lock;	/* error list/ereport lock */
    145 	avl_tree_t	spa_errlist_last;	/* last error list */
    146 	avl_tree_t	spa_errlist_scrub;	/* scrub error list */
    147 	uint64_t	spa_deflate;		/* should we deflate? */
    148 	uint64_t	spa_history;		/* history object */
    149 	kmutex_t	spa_history_lock;	/* history lock */
    150 	vdev_t		*spa_pending_vdev;	/* pending vdev additions */
    151 	kmutex_t	spa_props_lock;		/* property lock */
    152 	uint64_t	spa_pool_props_object;	/* object for properties */
    153 	uint64_t	spa_bootfs;		/* default boot filesystem */
    154 	boolean_t	spa_delegation;		/* delegation on/off */
    155 	char		*spa_config_dir;	/* cache file directory */
    156 	char		*spa_config_file;	/* cache file name */
    157 	list_t		spa_zio_list;		/* zio error list */
    158 	kcondvar_t	spa_zio_cv;		/* resume I/O pipeline */
    159 	kmutex_t	spa_zio_lock;		/* zio error lock */
    160 	uint8_t		spa_failmode;		/* failure mode for the pool */
    161 	/*
    162 	 * spa_refcnt & spa_config_lock must be the last elements
    163 	 * because refcount_t changes size based on compilation options.
    164 	 * In order for the MDB module to function correctly, the other
    165 	 * fields must remain in the same location.
    166 	 */
    167 	spa_config_lock_t spa_config_lock;	/* configuration changes */
    168 	refcount_t	spa_refcount;		/* number of opens */
    169 };
    170 
    171 extern const char *spa_config_dir;
    172 extern kmutex_t spa_namespace_lock;
    173 
    174 #ifdef	__cplusplus
    175 }
    176 #endif
    177 
    178 #endif	/* _SYS_SPA_IMPL_H */
    179