mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-20 11:13:58 +08:00
47 lines
1.3 KiB
C
47 lines
1.3 KiB
C
|
/*
|
||
|
|
* Copyright (C) 2017 Red Hat. All rights reserved.
|
||
|
|
*
|
||
|
|
* This file is released under the GPL.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef DM_CACHE_BACKGROUND_WORK_H
|
||
|
|
#define DM_CACHE_BACKGROUND_WORK_H
|
||
|
|
|
||
|
|
#include <linux/vmalloc.h>
|
||
|
|
#include "dm-cache-policy.h"
|
||
|
|
|
||
|
|
/*----------------------------------------------------------------*/
|
||
|
|
|
||
|
|
struct background_work;
|
||
|
|
struct background_tracker;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* FIXME: discuss lack of locking in all methods.
|
||
|
|
*/
|
||
|
|
struct background_tracker *btracker_create(unsigned max_work);
|
||
|
|
void btracker_destroy(struct background_tracker *b);
|
||
|
|
|
||
|
|
unsigned btracker_nr_writebacks_queued(struct background_tracker *b);
|
||
|
|
unsigned btracker_nr_demotions_queued(struct background_tracker *b);
|
||
|
|
|
||
|
|
/*
|
||
|
|
* returns -EINVAL iff the work is already queued. -ENOMEM if the work
|
||
|
|
* couldn't be queued for another reason.
|
||
|
|
*/
|
||
|
|
int btracker_queue(struct background_tracker *b,
|
||
|
|
struct policy_work *work,
|
||
|
|
struct policy_work **pwork);
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Returns -ENODATA if there's no work.
|
||
|
|
*/
|
||
|
|
int btracker_issue(struct background_tracker *b, struct policy_work **work);
|
||
|
|
void btracker_complete(struct background_tracker *b,
|
||
|
|
struct policy_work *op);
|
||
|
|
bool btracker_promotion_already_present(struct background_tracker *b,
|
||
|
|
dm_oblock_t oblock);
|
||
|
|
|
||
|
|
/*----------------------------------------------------------------*/
|
||
|
|
|
||
|
|
#endif
|