1 /* SPDX-License-Identifier: GPL-2.0 */
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);
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, long long *mtime_out,
15 unsigned long long *size_out, int *sectorsize_out,
16 __u32 *align_out, int *bitmap_offset_out);
18 extern int write_cow_header(char *cow_file, int fd, char *backing_file,
19 int sectorsize, int alignment,
20 unsigned long long *size);
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);