spa_impl.h revision fa9e4066f08beec538e775443c5be79dd423fcab
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2005 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#ifndef _SYS_SPA_IMPL_H
#define _SYS_SPA_IMPL_H
#pragma ident "%Z%%M% %I% %E% SMI"
#include <sys/spa.h>
#include <sys/vdev.h>
#include <sys/metaslab.h>
#include <sys/dmu.h>
#include <sys/dsl_pool.h>
#include <sys/uberblock_impl.h>
#include <sys/zfs_context.h>
#include <sys/avl.h>
#include <sys/refcount.h>
#include <sys/bplist.h>
#ifdef __cplusplus
extern "C" {
#endif
typedef struct spa_config_lock {
kmutex_t scl_lock;
uint64_t scl_count;
kthread_t *scl_writer;
kcondvar_t scl_cv;
} spa_config_lock_t;
struct spa {
/*
* Fields protected by spa_namespace_lock.
*/
char *spa_name;
avl_node_t spa_avl;
int spa_anon;
nvlist_t *spa_config;
uint64_t spa_config_txg; /* txg of last config change */
spa_config_lock_t spa_config_lock; /* configuration changes */
kmutex_t spa_config_cache_lock; /* for spa_config RW_READER */
int spa_sync_pass; /* iterate-to-convergence */
int spa_state; /* pool state */
uint8_t spa_minref; /* min refcnt of open pool */
uint8_t spa_traverse_wanted; /* traverse lock wanted */
taskq_t *spa_vdev_retry_taskq;
taskq_t *spa_zio_issue_taskq[ZIO_TYPES];
taskq_t *spa_zio_intr_taskq[ZIO_TYPES];
dsl_pool_t *spa_dsl_pool;
metaslab_class_t *spa_normal_class; /* normal data class */
uint64_t spa_first_txg; /* first txg after spa_open() */
uint64_t spa_freeze_txg; /* freeze pool at this txg */
objset_t *spa_meta_objset; /* copy of dp->dp_meta_objset */
txg_list_t spa_vdev_txg_list; /* per-txg dirty vdev list */
vdev_t *spa_root_vdev; /* top-level vdev container */
list_t spa_dirty_list; /* vdevs with dirty labels */
uint64_t spa_config_object; /* MOS object for pool config */
uint64_t spa_syncing_txg; /* txg currently syncing */
uint64_t spa_sync_bplist_obj; /* object for deferred frees */
bplist_t spa_sync_bplist; /* deferred-free bplist */
krwlock_t spa_traverse_lock; /* traverse vs. spa_sync() */
uberblock_t spa_ubsync; /* last synced uberblock */
uberblock_t spa_uberblock; /* current uberblock */
kmutex_t spa_scrub_lock; /* resilver/scrub lock */
kthread_t *spa_scrub_thread; /* scrub/resilver thread */
traverse_handle_t *spa_scrub_th; /* scrub traverse handle */
uint64_t spa_scrub_restart_txg; /* need to restart */
uint64_t spa_scrub_maxtxg; /* max txg we'll scrub */
uint64_t spa_scrub_inflight; /* in-flight scrub I/Os */
uint64_t spa_scrub_errors; /* scrub I/O error count */
kcondvar_t spa_scrub_cv; /* scrub thread state change */
kcondvar_t spa_scrub_io_cv; /* scrub I/O completion */
uint8_t spa_scrub_stop; /* tell scrubber to stop */
uint8_t spa_scrub_suspend; /* tell scrubber to suspend */
uint8_t spa_scrub_active; /* active or suspended? */
uint8_t spa_scrub_type; /* type of scrub we're doing */
int spa_sync_on; /* sync threads are running */
char *spa_root; /* alternate root directory */
kmutex_t spa_uberblock_lock; /* vdev_uberblock_load_done() */
/*
* spa_refcnt must be the last element because it changes size based on
* compilation options. In order for the MDB module to function
* correctly, the other fields must remain in the same location.
*/
refcount_t spa_refcount; /* number of opens */
};
extern const char *spa_config_dir;
extern kmutex_t spa_namespace_lock;
#ifdef __cplusplus
}
#endif
#endif /* _SYS_SPA_IMPL_H */