| Greg Kroah-Hartman | b244131 | 2017-11-01 15:07:57 +0100 | [diff] [blame] | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2 | #ifndef __COW_H__ |
| 3 | #define __COW_H__ |
| 4 | |
| 5 | #include <asm/types.h> |
| 6 | |
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7 | extern int init_cow_file(int fd, char *cow_file, char *backing_file, |
| 8 | int sectorsize, int alignment, int *bitmap_offset_out, |
| 9 | unsigned long *bitmap_len_out, int *data_offset_out); |
| 10 | |
| 11 | extern int file_reader(__u64 offset, char *buf, int len, void *arg); |
| 12 | extern int read_cow_header(int (*reader)(__u64, char *, int, void *), |
| 13 | void *arg, __u32 *version_out, |
| 14 | char **backing_file_out, time_t *mtime_out, |
| Paolo 'Blaisorblade' Giarrusso | 52c7378 | 2006-04-10 22:53:41 -0700 | [diff] [blame] | 15 | unsigned long long *size_out, int *sectorsize_out, |
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 16 | __u32 *align_out, int *bitmap_offset_out); |
| 17 | |
| 18 | extern int write_cow_header(char *cow_file, int fd, char *backing_file, |
| 19 | int sectorsize, int alignment, |
| 20 | unsigned long long *size); |
| 21 | |
| 22 | extern void cow_sizes(int version, __u64 size, int sectorsize, int align, |
| 23 | int bitmap_offset, unsigned long *bitmap_len_out, |
| 24 | int *data_offset_out); |
| 25 | |
| 26 | #endif |
| 27 | |
| 28 | /* |
| 29 | * --------------------------------------------------------------------------- |
| 30 | * Local variables: |
| 31 | * c-file-style: "linux" |
| 32 | * End: |
| 33 | */ |