1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /* -*- mode: c; c-basic-offset: 8; -*-
3 * vim: noexpandtab sw=8 ts=8 sts=0:
7 * Cluster uptodate tracking
9 * Copyright (C) 2002, 2004, 2005 Oracle. All rights reserved.
12 #ifndef OCFS2_UPTODATE_H
13 #define OCFS2_UPTODATE_H
16 * The caching code relies on locking provided by the user of
17 * struct ocfs2_caching_info. These operations connect that up.
19 struct ocfs2_caching_operations {
21 * A u64 representing the owning structure. Usually this
22 * is the block number (i_blkno or whatnot). This is used so
23 * that caching log messages can identify the owning structure.
25 u64 (*co_owner)(struct ocfs2_caching_info *ci);
27 /* The superblock is needed during I/O. */
28 struct super_block *(*co_get_super)(struct ocfs2_caching_info *ci);
30 * Lock and unlock the caching data. These will not sleep, and
31 * should probably be spinlocks.
33 void (*co_cache_lock)(struct ocfs2_caching_info *ci);
34 void (*co_cache_unlock)(struct ocfs2_caching_info *ci);
37 * Lock and unlock for disk I/O. These will sleep, and should
40 void (*co_io_lock)(struct ocfs2_caching_info *ci);
41 void (*co_io_unlock)(struct ocfs2_caching_info *ci);
44 int __init init_ocfs2_uptodate_cache(void);
45 void exit_ocfs2_uptodate_cache(void);
47 void ocfs2_metadata_cache_init(struct ocfs2_caching_info *ci,
48 const struct ocfs2_caching_operations *ops);
49 void ocfs2_metadata_cache_purge(struct ocfs2_caching_info *ci);
50 void ocfs2_metadata_cache_exit(struct ocfs2_caching_info *ci);
52 u64 ocfs2_metadata_cache_owner(struct ocfs2_caching_info *ci);
53 void ocfs2_metadata_cache_io_lock(struct ocfs2_caching_info *ci);
54 void ocfs2_metadata_cache_io_unlock(struct ocfs2_caching_info *ci);
56 int ocfs2_buffer_uptodate(struct ocfs2_caching_info *ci,
57 struct buffer_head *bh);
58 void ocfs2_set_buffer_uptodate(struct ocfs2_caching_info *ci,
59 struct buffer_head *bh);
60 void ocfs2_set_new_buffer_uptodate(struct ocfs2_caching_info *ci,
61 struct buffer_head *bh);
62 void ocfs2_remove_from_cache(struct ocfs2_caching_info *ci,
63 struct buffer_head *bh);
64 void ocfs2_remove_xattr_clusters_from_cache(struct ocfs2_caching_info *ci,
67 int ocfs2_buffer_read_ahead(struct ocfs2_caching_info *ci,
68 struct buffer_head *bh);
70 #endif /* OCFS2_UPTODATE_H */