2005-04-16 22:20:36 +00:00
|
|
|
#ifndef __COW_H__
|
|
|
|
|
#define __COW_H__
|
|
|
|
|
|
|
|
|
|
#include <asm/types.h>
|
|
|
|
|
|
2005-07-27 18:45:17 +00:00
|
|
|
#if defined(__BIG_ENDIAN)
|
2005-04-16 22:20:36 +00:00
|
|
|
# define ntohll(x) (x)
|
|
|
|
|
# define htonll(x) (x)
|
2005-07-27 18:45:17 +00:00
|
|
|
#elif defined(__LITTLE_ENDIAN)
|
2005-04-16 22:20:36 +00:00
|
|
|
# define ntohll(x) bswap_64(x)
|
|
|
|
|
# define htonll(x) bswap_64(x)
|
|
|
|
|
#else
|
|
|
|
|
#error "__BYTE_ORDER not defined"
|
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
extern int init_cow_file(int fd, char *cow_file, char *backing_file,
|
|
|
|
|
int sectorsize, int alignment, int *bitmap_offset_out,
|
|
|
|
|
unsigned long *bitmap_len_out, int *data_offset_out);
|
|
|
|
|
|
|
|
|
|
extern int file_reader(__u64 offset, char *buf, int len, void *arg);
|
|
|
|
|
extern int read_cow_header(int (*reader)(__u64, char *, int, void *),
|
|
|
|
|
void *arg, __u32 *version_out,
|
|
|
|
|
char **backing_file_out, time_t *mtime_out,
|
|
|
|
|
unsigned long long *size_out, int *sectorsize_out,
|
|
|
|
|
__u32 *align_out, int *bitmap_offset_out);
|
|
|
|
|
|
|
|
|
|
extern int write_cow_header(char *cow_file, int fd, char *backing_file,
|
|
|
|
|
int sectorsize, int alignment,
|
|
|
|
|
unsigned long long *size);
|
|
|
|
|
|
|
|
|
|
extern void cow_sizes(int version, __u64 size, int sectorsize, int align,
|
|
|
|
|
int bitmap_offset, unsigned long *bitmap_len_out,
|
|
|
|
|
int *data_offset_out);
|
|
|
|
|
|
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* ---------------------------------------------------------------------------
|
|
|
|
|
* Local variables:
|
|
|
|
|
* c-file-style: "linux"
|
|
|
|
|
* End:
|
|
|
|
|
*/
|
