| /* SPDX-License-Identifier: GPL-2.0 */ |
| #ifndef __COW_H__ |
| #define __COW_H__ |
| |
| #include <asm/types.h> |
| |
| extern int init_cow_file(int fd, char *cow_file, char *backing_file, |
| int sectorsize, int alignment, int *bitmap_offset_out, |
| unsigned long *bitmap_len_out, int *data_offset_out); |
| |
| extern int file_reader(__u64 offset, char *buf, int len, void *arg); |
| extern int read_cow_header(int (*reader)(__u64, char *, int, void *), |
| void *arg, __u32 *version_out, |
| char **backing_file_out, long long *mtime_out, |
| unsigned long long *size_out, int *sectorsize_out, |
| __u32 *align_out, int *bitmap_offset_out); |
| |
| extern int write_cow_header(char *cow_file, int fd, char *backing_file, |
| int sectorsize, int alignment, |
| unsigned long long *size); |
| |
| extern void cow_sizes(int version, __u64 size, int sectorsize, int align, |
| int bitmap_offset, unsigned long *bitmap_len_out, |
| int *data_offset_out); |
| |
| #endif |
