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1#ifndef __COW_H__
2#define __COW_H__
3
4#include <asm/types.h>
5
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6extern int init_cow_file(int fd, char *cow_file, char *backing_file,
7 int sectorsize, int alignment, int *bitmap_offset_out,
8 unsigned long *bitmap_len_out, int *data_offset_out);
9
10extern int file_reader(__u64 offset, char *buf, int len, void *arg);
11extern int read_cow_header(int (*reader)(__u64, char *, int, void *),
12 void *arg, __u32 *version_out,
13 char **backing_file_out, time_t *mtime_out,
52c73782 14 unsigned long long *size_out, int *sectorsize_out,
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15 __u32 *align_out, int *bitmap_offset_out);
16
17extern int write_cow_header(char *cow_file, int fd, char *backing_file,
18 int sectorsize, int alignment,
19 unsigned long long *size);
20
21extern void cow_sizes(int version, __u64 size, int sectorsize, int align,
22 int bitmap_offset, unsigned long *bitmap_len_out,
23 int *data_offset_out);
24
25#endif
26
27/*
28 * ---------------------------------------------------------------------------
29 * Local variables:
30 * c-file-style: "linux"
31 * End:
32 */