| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | */ |