1 #ifndef __COW_H__ 2 #define __COW_H__ 3 4 #include <asm/types.h> 5 6 extern 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 10 extern int file_reader(__u64 offset, char *buf, int len, void *arg); 11 extern 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 17 extern int write_cow_header(char *cow_file, int fd, char *backing_file, 18 int sectorsize, int alignment, 19 unsigned long long *size); 20 21 extern 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 */ 33