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:
 4 *
 5 * ocfs2_buffer_head.h
 6 *
 7 * Buffer cache handling functions defined
 8 *
 9 * Copyright (C) 2002, 2004 Oracle.  All rights reserved.
10 */
11
12#ifndef OCFS2_BUFFER_HEAD_IO_H
13#define OCFS2_BUFFER_HEAD_IO_H
14
15#include <linux/buffer_head.h>
16
17int ocfs2_write_block(struct ocfs2_super          *osb,
18		      struct buffer_head  *bh,
19		      struct ocfs2_caching_info   *ci);
20int ocfs2_read_blocks_sync(struct ocfs2_super *osb, u64 block,
21			   unsigned int nr, struct buffer_head *bhs[]);
22
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 */
30int ocfs2_read_blocks(struct ocfs2_caching_info *ci, u64 block, int nr,
31		      struct buffer_head *bhs[], int flags,
32		      int (*validate)(struct super_block *sb,
33				      struct buffer_head *bh));
34
35int ocfs2_write_super_or_backup(struct ocfs2_super *osb,
36				struct buffer_head *bh);
37
38#define OCFS2_BH_IGNORE_CACHE      1
39#define OCFS2_BH_READAHEAD         8
40
41static inline int ocfs2_read_block(struct ocfs2_caching_info *ci, u64 off,
42				   struct buffer_head **bh,
43				   int (*validate)(struct super_block *sb,
44						   struct buffer_head *bh))
45{
46	int status = 0;
47
48	if (bh == NULL) {
49		printk("ocfs2: bh == NULL\n");
50		status = -EINVAL;
51		goto bail;
52	}
53
54	status = ocfs2_read_blocks(ci, off, 1, bh, 0, validate);
55
56bail:
57	return status;
58}
59
60#endif /* OCFS2_BUFFER_HEAD_IO_H */

 1/* SPDX-License-Identifier: GPL-2.0-or-later */
 2/*
 
 
 3 * ocfs2_buffer_head.h
 4 *
 5 * Buffer cache handling functions defined
 6 *
 7 * Copyright (C) 2002, 2004 Oracle.  All rights reserved.
 8 */
 9
10#ifndef OCFS2_BUFFER_HEAD_IO_H
11#define OCFS2_BUFFER_HEAD_IO_H
12
13#include <linux/buffer_head.h>
14
15int ocfs2_write_block(struct ocfs2_super          *osb,
16		      struct buffer_head  *bh,
17		      struct ocfs2_caching_info   *ci);
18int ocfs2_read_blocks_sync(struct ocfs2_super *osb, u64 block,
19			   unsigned int nr, struct buffer_head *bhs[]);
20
21/*
22 * If not NULL, validate() will be called on a buffer that is freshly
23 * read from disk.  It will not be called if the buffer was in cache.
24 * Note that if validate() is being used for this buffer, it needs to
25 * be set even for a READAHEAD call, as it marks the buffer for later
26 * validation.
27 */
28int ocfs2_read_blocks(struct ocfs2_caching_info *ci, u64 block, int nr,
29		      struct buffer_head *bhs[], int flags,
30		      int (*validate)(struct super_block *sb,
31				      struct buffer_head *bh));
32
33int ocfs2_write_super_or_backup(struct ocfs2_super *osb,
34				struct buffer_head *bh);
35
36#define OCFS2_BH_IGNORE_CACHE      1
37#define OCFS2_BH_READAHEAD         8
38
39static inline int ocfs2_read_block(struct ocfs2_caching_info *ci, u64 off,
40				   struct buffer_head **bh,
41				   int (*validate)(struct super_block *sb,
42						   struct buffer_head *bh))
43{
44	int status = 0;
45
46	if (bh == NULL) {
47		printk("ocfs2: bh == NULL\n");
48		status = -EINVAL;
49		goto bail;
50	}
51
52	status = ocfs2_read_blocks(ci, off, 1, bh, 0, validate);
53
54bail:
55	return status;
56}
57
58#endif /* OCFS2_BUFFER_HEAD_IO_H */