1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
|
/*
* Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
* Copyright (C) 2004-2005 Red Hat, Inc. All rights reserved.
*
* This copyrighted material is made available to anyone wishing to use,
* modify, copy, or redistribute it subject to the terms and conditions
* of the GNU General Public License v.2.
*/
#ifndef __FILE_DOT_H__
#define __FILE_DOT_H__
int gfs2_jdata_get_buffer(struct gfs2_inode *ip, uint64_t block, int new,
struct buffer_head **bhp);
typedef int (*read_copy_fn_t) (struct buffer_head *bh, char **buf,
unsigned int offset, unsigned int size);
typedef int (*write_copy_fn_t) (struct gfs2_inode *ip,
struct buffer_head *bh, const char **buf,
unsigned int offset, unsigned int size);
int gfs2_copy2mem(struct buffer_head *bh, char **buf,
unsigned int offset, unsigned int size);
int gfs2_copy2user(struct buffer_head *bh, char __user **buf,
unsigned int offset, unsigned int size);
int gfs2_jdata_read(struct gfs2_inode *ip, char __user *buf,
uint64_t offset, unsigned int size,
read_copy_fn_t copy_fn);
int gfs2_copy_from_mem(struct gfs2_inode *ip,
struct buffer_head *bh, const char **buf,
unsigned int offset, unsigned int size);
int gfs2_copy_from_user(struct gfs2_inode *ip,
struct buffer_head *bh, const char __user **buf,
unsigned int offset, unsigned int size);
int gfs2_jdata_write(struct gfs2_inode *ip, const char __user *buf,
uint64_t offset, unsigned int size,
write_copy_fn_t copy_fn);
static inline int gfs2_jdata_read_mem(struct gfs2_inode *ip, char *buf,
uint64_t offset, unsigned int size)
{
return gfs2_jdata_read(ip, (__force char __user *)buf, offset, size, gfs2_copy2mem);
}
static inline int gfs2_jdata_write_mem(struct gfs2_inode *ip, const char *buf,
uint64_t offset, unsigned int size)
{
return gfs2_jdata_write(ip, (__force const char __user *)buf, offset, size, gfs2_copy_from_mem);
}
#endif /* __FILE_DOT_H__ */
|
