1 #ifndef __COW_H__ 2 #define __COW_H__ 3 4 #include <asm/types.h> 5 6 #if __BYTE_ORDER == __BIG_ENDIAN 7 # define ntohll(x) (x) 8 # define htonll(x) (x) 9 #elif __BYTE_ORDER == __LITTLE_ENDIAN 10 # define ntohll(x) bswap_64(x) 11 # define htonll(x) bswap_64(x) 12 #else 13 #error "__BYTE_ORDER not defined" 14 #endif 15 16 extern int init_cow_file(int fd, char *cow_file, char *backing_file, 17 int sectorsize, int alignment, int *bitmap_offset_out, 18 unsigned long *bitmap_len_out, int *data_offset_out); 19 20 extern int file_reader(__u64 offset, char *buf, int len, void *arg); 21 extern int read_cow_header(int (*reader)(__u64, char *, int, void *), 22 void *arg, __u32 *version_out, 23 char **backing_file_out, time_t *mtime_out, 24 unsigned long long *size_out, int *sectorsize_out, 25 __u32 *align_out, int *bitmap_offset_out); 26 27 extern int write_cow_header(char *cow_file, int fd, char *backing_file, 28 int sectorsize, int alignment, 29 unsigned long long *size); 30 31 extern void cow_sizes(int version, __u64 size, int sectorsize, int align, 32 int bitmap_offset, unsigned long *bitmap_len_out, 33 int *data_offset_out); 34 35 #endif 36 37 /* 38 * --------------------------------------------------------------------------- 39 * Local variables: 40 * c-file-style: "linux" 41 * End: 42 */ 43