1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /*
3 * uptodate.h
4 *
5 * Cluster uptodate tracking
6 *
7 * Copyright (C) 2002, 2004, 2005 Oracle. All rights reserved.
8 */
9
10 #ifndef OCFS2_UPTODATE_H
11 #define OCFS2_UPTODATE_H
12
13 /*
14 * The caching code relies on locking provided by the user of
15 * struct ocfs2_caching_info. These operations connect that up.
16 */
17 struct ocfs2_caching_operations {
18 /*
19 * A u64 representing the owning structure. Usually this
20 * is the block number (i_blkno or whatnot). This is used so
21 * that caching log messages can identify the owning structure.
22 */
23 u64 (*co_owner)(struct ocfs2_caching_info *ci);
24
25 /* The superblock is needed during I/O. */
26 struct super_block *(*co_get_super)(struct ocfs2_caching_info *ci);
27 /*
28 * Lock and unlock the caching data. These will not sleep, and
29 * should probably be spinlocks.
30 */
31 void (*co_cache_lock)(struct ocfs2_caching_info *ci);
32 void (*co_cache_unlock)(struct ocfs2_caching_info *ci);
33
34 /*
35 * Lock and unlock for disk I/O. These will sleep, and should
36 * be mutexes.
37 */
38 void (*co_io_lock)(struct ocfs2_caching_info *ci);
39 void (*co_io_unlock)(struct ocfs2_caching_info *ci);
40 };
41
42 int __init init_ocfs2_uptodate_cache(void);
43 void exit_ocfs2_uptodate_cache(void);
44
45 void ocfs2_metadata_cache_init(struct ocfs2_caching_info *ci,
46 const struct ocfs2_caching_operations *ops);
47 void ocfs2_metadata_cache_purge(struct ocfs2_caching_info *ci);
48 void ocfs2_metadata_cache_exit(struct ocfs2_caching_info *ci);
49
50 u64 ocfs2_metadata_cache_owner(struct ocfs2_caching_info *ci);
51 void ocfs2_metadata_cache_io_lock(struct ocfs2_caching_info *ci);
52 void ocfs2_metadata_cache_io_unlock(struct ocfs2_caching_info *ci);
53
54 int ocfs2_buffer_uptodate(struct ocfs2_caching_info *ci,
55 struct buffer_head *bh);
56 void ocfs2_set_buffer_uptodate(struct ocfs2_caching_info *ci,
57 struct buffer_head *bh);
58 void ocfs2_set_new_buffer_uptodate(struct ocfs2_caching_info *ci,
59 struct buffer_head *bh);
60 void ocfs2_remove_from_cache(struct ocfs2_caching_info *ci,
61 struct buffer_head *bh);
62 void ocfs2_remove_xattr_clusters_from_cache(struct ocfs2_caching_info *ci,
63 sector_t block,
64 u32 c_len);
65 int ocfs2_buffer_read_ahead(struct ocfs2_caching_info *ci,
66 struct buffer_head *bh);
67
68 #endif /* OCFS2_UPTODATE_H */
69
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.