18c2ecf20Sopenharmony_ci/* SPDX-License-Identifier: GPL-2.0 */ 28c2ecf20Sopenharmony_ci#ifndef __COW_H__ 38c2ecf20Sopenharmony_ci#define __COW_H__ 48c2ecf20Sopenharmony_ci 58c2ecf20Sopenharmony_ci#include <asm/types.h> 68c2ecf20Sopenharmony_ci 78c2ecf20Sopenharmony_ciextern int init_cow_file(int fd, char *cow_file, char *backing_file, 88c2ecf20Sopenharmony_ci int sectorsize, int alignment, int *bitmap_offset_out, 98c2ecf20Sopenharmony_ci unsigned long *bitmap_len_out, int *data_offset_out); 108c2ecf20Sopenharmony_ci 118c2ecf20Sopenharmony_ciextern int file_reader(__u64 offset, char *buf, int len, void *arg); 128c2ecf20Sopenharmony_ciextern int read_cow_header(int (*reader)(__u64, char *, int, void *), 138c2ecf20Sopenharmony_ci void *arg, __u32 *version_out, 148c2ecf20Sopenharmony_ci char **backing_file_out, long long *mtime_out, 158c2ecf20Sopenharmony_ci unsigned long long *size_out, int *sectorsize_out, 168c2ecf20Sopenharmony_ci __u32 *align_out, int *bitmap_offset_out); 178c2ecf20Sopenharmony_ci 188c2ecf20Sopenharmony_ciextern int write_cow_header(char *cow_file, int fd, char *backing_file, 198c2ecf20Sopenharmony_ci int sectorsize, int alignment, 208c2ecf20Sopenharmony_ci unsigned long long *size); 218c2ecf20Sopenharmony_ci 228c2ecf20Sopenharmony_ciextern void cow_sizes(int version, __u64 size, int sectorsize, int align, 238c2ecf20Sopenharmony_ci int bitmap_offset, unsigned long *bitmap_len_out, 248c2ecf20Sopenharmony_ci int *data_offset_out); 258c2ecf20Sopenharmony_ci 268c2ecf20Sopenharmony_ci#endif 278c2ecf20Sopenharmony_ci 288c2ecf20Sopenharmony_ci/* 298c2ecf20Sopenharmony_ci * --------------------------------------------------------------------------- 308c2ecf20Sopenharmony_ci * Local variables: 318c2ecf20Sopenharmony_ci * c-file-style: "linux" 328c2ecf20Sopenharmony_ci * End: 338c2ecf20Sopenharmony_ci */ 34