diff options
Diffstat (limited to 'arch/um/drivers/cow.h')
| -rw-r--r-- | arch/um/drivers/cow.h | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/arch/um/drivers/cow.h b/arch/um/drivers/cow.h new file mode 100644 index 0000000000..9a67c01700 --- /dev/null +++ b/arch/um/drivers/cow.h @@ -0,0 +1,26 @@ +/* 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 |