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328970de | 1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
ccd979bd MF |
2 | /* -*- mode: c; c-basic-offset: 8; -*- |
3 | * vim: noexpandtab sw=8 ts=8 sts=0: | |
4 | * | |
5 | * uptodate.h | |
6 | * | |
7 | * Cluster uptodate tracking | |
8 | * | |
9 | * Copyright (C) 2002, 2004, 2005 Oracle. All rights reserved. | |
ccd979bd MF |
10 | */ |
11 | ||
12 | #ifndef OCFS2_UPTODATE_H | |
13 | #define OCFS2_UPTODATE_H | |
14 | ||
6e5a3d75 JB |
15 | /* |
16 | * The caching code relies on locking provided by the user of | |
17 | * struct ocfs2_caching_info. These operations connect that up. | |
18 | */ | |
19 | struct ocfs2_caching_operations { | |
20 | /* | |
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. | |
24 | */ | |
25 | u64 (*co_owner)(struct ocfs2_caching_info *ci); | |
26 | ||
8cb471e8 JB |
27 | /* The superblock is needed during I/O. */ |
28 | struct super_block *(*co_get_super)(struct ocfs2_caching_info *ci); | |
6e5a3d75 JB |
29 | /* |
30 | * Lock and unlock the caching data. These will not sleep, and | |
31 | * should probably be spinlocks. | |
32 | */ | |
33 | void (*co_cache_lock)(struct ocfs2_caching_info *ci); | |
34 | void (*co_cache_unlock)(struct ocfs2_caching_info *ci); | |
35 | ||
36 | /* | |
37 | * Lock and unlock for disk I/O. These will sleep, and should | |
38 | * be mutexes. | |
39 | */ | |
40 | void (*co_io_lock)(struct ocfs2_caching_info *ci); | |
41 | void (*co_io_unlock)(struct ocfs2_caching_info *ci); | |
42 | }; | |
43 | ||
ccd979bd | 44 | int __init init_ocfs2_uptodate_cache(void); |
0c6c98fb | 45 | void exit_ocfs2_uptodate_cache(void); |
ccd979bd | 46 | |
47460d65 | 47 | void ocfs2_metadata_cache_init(struct ocfs2_caching_info *ci, |
6e5a3d75 | 48 | const struct ocfs2_caching_operations *ops); |
8cb471e8 | 49 | void ocfs2_metadata_cache_purge(struct ocfs2_caching_info *ci); |
66fb345d | 50 | void ocfs2_metadata_cache_exit(struct ocfs2_caching_info *ci); |
ccd979bd | 51 | |
8cb471e8 | 52 | u64 ocfs2_metadata_cache_owner(struct ocfs2_caching_info *ci); |
8cb471e8 JB |
53 | void ocfs2_metadata_cache_io_lock(struct ocfs2_caching_info *ci); |
54 | void ocfs2_metadata_cache_io_unlock(struct ocfs2_caching_info *ci); | |
55 | ||
56 | int ocfs2_buffer_uptodate(struct ocfs2_caching_info *ci, | |
ccd979bd | 57 | struct buffer_head *bh); |
8cb471e8 | 58 | void ocfs2_set_buffer_uptodate(struct ocfs2_caching_info *ci, |
ccd979bd | 59 | struct buffer_head *bh); |
8cb471e8 | 60 | void ocfs2_set_new_buffer_uptodate(struct ocfs2_caching_info *ci, |
ccd979bd | 61 | struct buffer_head *bh); |
8cb471e8 | 62 | void ocfs2_remove_from_cache(struct ocfs2_caching_info *ci, |
ccd979bd | 63 | struct buffer_head *bh); |
8cb471e8 | 64 | void ocfs2_remove_xattr_clusters_from_cache(struct ocfs2_caching_info *ci, |
ac11c827 TM |
65 | sector_t block, |
66 | u32 c_len); | |
8cb471e8 | 67 | int ocfs2_buffer_read_ahead(struct ocfs2_caching_info *ci, |
aa958874 | 68 | struct buffer_head *bh); |
ccd979bd MF |
69 | |
70 | #endif /* OCFS2_UPTODATE_H */ |