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- /* 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
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