69 lines
2.3 KiB
C
69 lines
2.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
|
|
/*
|
|
* uptodate.h
|
|
*
|
|
* Cluster uptodate tracking
|
|
*
|
|
* Copyright (C) 2002, 2004, 2005 Oracle. All rights reserved.
|
|
*/
|
|
|
|
#ifndef OCFS2_UPTODATE_H
|
|
#define OCFS2_UPTODATE_H
|
|
|
|
/*
|
|
* The caching code relies on locking provided by the user of
|
|
* struct ocfs2_caching_info. These operations connect that up.
|
|
*/
|
|
struct ocfs2_caching_operations {
|
|
/*
|
|
* A u64 representing the owning structure. Usually this
|
|
* is the block number (i_blkno or whatnot). This is used so
|
|
* that caching log messages can identify the owning structure.
|
|
*/
|
|
u64 (*co_owner)(struct ocfs2_caching_info *ci);
|
|
|
|
/* The superblock is needed during I/O. */
|
|
struct super_block *(*co_get_super)(struct ocfs2_caching_info *ci);
|
|
/*
|
|
* Lock and unlock the caching data. These will not sleep, and
|
|
* should probably be spinlocks.
|
|
*/
|
|
void (*co_cache_lock)(struct ocfs2_caching_info *ci);
|
|
void (*co_cache_unlock)(struct ocfs2_caching_info *ci);
|
|
|
|
/*
|
|
* Lock and unlock for disk I/O. These will sleep, and should
|
|
* be mutexes.
|
|
*/
|
|
void (*co_io_lock)(struct ocfs2_caching_info *ci);
|
|
void (*co_io_unlock)(struct ocfs2_caching_info *ci);
|
|
};
|
|
|
|
int __init init_ocfs2_uptodate_cache(void);
|
|
void exit_ocfs2_uptodate_cache(void);
|
|
|
|
void ocfs2_metadata_cache_init(struct ocfs2_caching_info *ci,
|
|
const struct ocfs2_caching_operations *ops);
|
|
void ocfs2_metadata_cache_purge(struct ocfs2_caching_info *ci);
|
|
void ocfs2_metadata_cache_exit(struct ocfs2_caching_info *ci);
|
|
|
|
u64 ocfs2_metadata_cache_owner(struct ocfs2_caching_info *ci);
|
|
void ocfs2_metadata_cache_io_lock(struct ocfs2_caching_info *ci);
|
|
void ocfs2_metadata_cache_io_unlock(struct ocfs2_caching_info *ci);
|
|
|
|
int ocfs2_buffer_uptodate(struct ocfs2_caching_info *ci,
|
|
struct buffer_head *bh);
|
|
void ocfs2_set_buffer_uptodate(struct ocfs2_caching_info *ci,
|
|
struct buffer_head *bh);
|
|
void ocfs2_set_new_buffer_uptodate(struct ocfs2_caching_info *ci,
|
|
struct buffer_head *bh);
|
|
void ocfs2_remove_from_cache(struct ocfs2_caching_info *ci,
|
|
struct buffer_head *bh);
|
|
void ocfs2_remove_xattr_clusters_from_cache(struct ocfs2_caching_info *ci,
|
|
sector_t block,
|
|
u32 c_len);
|
|
int ocfs2_buffer_read_ahead(struct ocfs2_caching_info *ci,
|
|
struct buffer_head *bh);
|
|
|
|
#endif /* OCFS2_UPTODATE_H */
|