69 lines
2.0 KiB
C
69 lines
2.0 KiB
C
/*
|
|
* CDDL HEADER START
|
|
*
|
|
* This file and its contents are supplied under the terms of the
|
|
* Common Development and Distribution License ("CDDL"), version 1.0.
|
|
* You may only use this file in accordance with the terms of version
|
|
* 1.0 of the CDDL.
|
|
*
|
|
* A full copy of the text of the CDDL should have accompanied this
|
|
* source. A copy of the CDDL is also available via the Internet at
|
|
* http://www.illumos.org/license/CDDL.
|
|
*
|
|
* CDDL HEADER END
|
|
*/
|
|
/*
|
|
* Copyright (C) 2017 by Lawrence Livermore National Security, LLC.
|
|
*/
|
|
|
|
#ifndef _SYS_MMP_H
|
|
#define _SYS_MMP_H
|
|
|
|
#include <sys/spa.h>
|
|
#include <sys/zfs_context.h>
|
|
#include <sys/uberblock_impl.h>
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
#define MMP_MIN_INTERVAL 100 /* ms */
|
|
#define MMP_DEFAULT_INTERVAL 1000 /* ms */
|
|
#define MMP_DEFAULT_IMPORT_INTERVALS 20
|
|
#define MMP_DEFAULT_FAIL_INTERVALS 10
|
|
|
|
typedef struct mmp_thread {
|
|
kmutex_t mmp_thread_lock; /* protect thread mgmt fields */
|
|
kcondvar_t mmp_thread_cv;
|
|
kthread_t *mmp_thread;
|
|
uint8_t mmp_thread_exiting;
|
|
kmutex_t mmp_io_lock; /* protect below */
|
|
hrtime_t mmp_last_write; /* last successful MMP write */
|
|
uint64_t mmp_delay; /* decaying avg ns between MMP writes */
|
|
uberblock_t mmp_ub; /* last ub written by sync */
|
|
zio_t *mmp_zio_root; /* root of mmp write zios */
|
|
uint64_t mmp_kstat_id; /* unique id for next MMP write kstat */
|
|
int mmp_skip_error; /* reason for last skipped write */
|
|
vdev_t *mmp_last_leaf; /* last mmp write sent here */
|
|
uint64_t mmp_leaf_last_gen; /* last mmp write sent here */
|
|
} mmp_thread_t;
|
|
|
|
|
|
extern void mmp_init(struct spa *spa);
|
|
extern void mmp_fini(struct spa *spa);
|
|
extern void mmp_thread_start(struct spa *spa);
|
|
extern void mmp_thread_stop(struct spa *spa);
|
|
extern void mmp_update_uberblock(struct spa *spa, struct uberblock *ub);
|
|
extern void mmp_signal_all_threads(void);
|
|
|
|
/* Global tuning */
|
|
extern ulong_t zfs_multihost_interval;
|
|
extern uint_t zfs_multihost_fail_intervals;
|
|
extern uint_t zfs_multihost_import_intervals;
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif /* _SYS_MMP_H */
|