1#ifndef __COW_H__
 2#define __COW_H__
 3
 4#include <asm/types.h>
 5
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 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,
14			   unsigned long long *size_out, int *sectorsize_out,
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 */

 1#ifndef __COW_H__
 2#define __COW_H__
 3
 4#include <asm/types.h>
 5
 6#if defined(__KERNEL__)
 7
 8# include <asm/byteorder.h>
 9
10# if defined(__BIG_ENDIAN)
11#	define ntohll(x) (x)
12#	define htonll(x) (x)
13# elif defined(__LITTLE_ENDIAN)
14#	define ntohll(x)  be64_to_cpu(x)
15#	define htonll(x)  cpu_to_be64(x)
16# else
17#	error "Could not determine byte order"
18# endif
19
20#else
21/* For the definition of ntohl, htonl and __BYTE_ORDER */
22#include <endian.h>
23#include <netinet/in.h>
24#if defined(__BYTE_ORDER)
25
26#  if __BYTE_ORDER == __BIG_ENDIAN
27#	define ntohll(x) (x)
28#	define htonll(x) (x)
29#  elif __BYTE_ORDER == __LITTLE_ENDIAN
30#	define ntohll(x)  bswap_64(x)
31#	define htonll(x)  bswap_64(x)
32#  else
33#	error "Could not determine byte order: __BYTE_ORDER uncorrectly defined"
34#  endif
35
36#else  /* ! defined(__BYTE_ORDER) */
37#	error "Could not determine byte order: __BYTE_ORDER not defined"
38#endif
39#endif /* ! defined(__KERNEL__) */
40
41extern int init_cow_file(int fd, char *cow_file, char *backing_file,
42			 int sectorsize, int alignment, int *bitmap_offset_out,
43			 unsigned long *bitmap_len_out, int *data_offset_out);
44
45extern int file_reader(__u64 offset, char *buf, int len, void *arg);
46extern int read_cow_header(int (*reader)(__u64, char *, int, void *),
47			   void *arg, __u32 *version_out,
48			   char **backing_file_out, time_t *mtime_out,
49			   unsigned long long *size_out, int *sectorsize_out,
50			   __u32 *align_out, int *bitmap_offset_out);
51
52extern int write_cow_header(char *cow_file, int fd, char *backing_file,
53			    int sectorsize, int alignment,
54			    unsigned long long *size);
55
56extern void cow_sizes(int version, __u64 size, int sectorsize, int align,
57		      int bitmap_offset, unsigned long *bitmap_len_out,
58		      int *data_offset_out);
59
60#endif
61
62/*
63 * ---------------------------------------------------------------------------
64 * Local variables:
65 * c-file-style: "linux"
66 * End:
67 */