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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 | * ocfs2_buffer_head.h | |
6 | * | |
7 | * Buffer cache handling functions defined | |
8 | * | |
9 | * Copyright (C) 2002, 2004 Oracle. All rights reserved. | |
ccd979bd MF |
10 | */ |
11 | ||
12 | #ifndef OCFS2_BUFFER_HEAD_IO_H | |
13 | #define OCFS2_BUFFER_HEAD_IO_H | |
14 | ||
15 | #include <linux/buffer_head.h> | |
16 | ||
ccd979bd MF |
17 | int ocfs2_write_block(struct ocfs2_super *osb, |
18 | struct buffer_head *bh, | |
8cb471e8 | 19 | struct ocfs2_caching_info *ci); |
da1e9098 JB |
20 | int ocfs2_read_blocks_sync(struct ocfs2_super *osb, u64 block, |
21 | unsigned int nr, struct buffer_head *bhs[]); | |
ccd979bd | 22 | |
970e4936 JB |
23 | /* |
24 | * If not NULL, validate() will be called on a buffer that is freshly | |
25 | * read from disk. It will not be called if the buffer was in cache. | |
26 | * Note that if validate() is being used for this buffer, it needs to | |
27 | * be set even for a READAHEAD call, as it marks the buffer for later | |
28 | * validation. | |
29 | */ | |
8cb471e8 | 30 | int ocfs2_read_blocks(struct ocfs2_caching_info *ci, u64 block, int nr, |
970e4936 JB |
31 | struct buffer_head *bhs[], int flags, |
32 | int (*validate)(struct super_block *sb, | |
33 | struct buffer_head *bh)); | |
34 | ||
d659072f TM |
35 | int ocfs2_write_super_or_backup(struct ocfs2_super *osb, |
36 | struct buffer_head *bh); | |
ccd979bd | 37 | |
d4a8c93c | 38 | #define OCFS2_BH_IGNORE_CACHE 1 |
aa958874 | 39 | #define OCFS2_BH_READAHEAD 8 |
ccd979bd | 40 | |
8cb471e8 | 41 | static inline int ocfs2_read_block(struct ocfs2_caching_info *ci, u64 off, |
970e4936 JB |
42 | struct buffer_head **bh, |
43 | int (*validate)(struct super_block *sb, | |
44 | struct buffer_head *bh)) | |
ccd979bd MF |
45 | { |
46 | int status = 0; | |
47 | ||
48 | if (bh == NULL) { | |
49 | printk("ocfs2: bh == NULL\n"); | |
50 | status = -EINVAL; | |
51 | goto bail; | |
52 | } | |
53 | ||
8cb471e8 | 54 | status = ocfs2_read_blocks(ci, off, 1, bh, 0, validate); |
ccd979bd MF |
55 | |
56 | bail: | |
57 | return status; | |
58 | } | |
59 | ||
60 | #endif /* OCFS2_BUFFER_HEAD_IO_H */ |