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 | |