mirror of
https://github.com/adulau/aha.git
synced 2024-12-27 11:16:11 +00:00
0cf2f7632b
The next step in divorcing metadata I/O management from struct inode is to pass struct ocfs2_caching_info to the journal functions. Thus the journal locks a metadata cache with the cache io_lock function. It also can compare ci_last_trans and ci_created_trans directly. This is a large patch because of all the places we change ocfs2_journal_access..(handle, inode, ...) to ocfs2_journal_access..(handle, INODE_CACHE(inode), ...). Signed-off-by: Joel Becker <joel.becker@oracle.com>
84 lines
3 KiB
C
84 lines
3 KiB
C
/* -*- mode: c; c-basic-offset: 8; -*-
|
|
* vim: noexpandtab sw=8 ts=8 sts=0:
|
|
*
|
|
* uptodate.h
|
|
*
|
|
* Cluster uptodate tracking
|
|
*
|
|
* Copyright (C) 2002, 2004, 2005 Oracle. All rights reserved.
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2 of the License, or (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public
|
|
* License along with this program; if not, write to the
|
|
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
|
* Boston, MA 021110-1307, USA.
|
|
*/
|
|
|
|
#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 */
|