cow.h 1.1 KB

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  1. /* SPDX-License-Identifier: GPL-2.0 */
  2. #ifndef __COW_H__
  3. #define __COW_H__
  4. #include <asm/types.h>
  5. extern int init_cow_file(int fd, char *cow_file, char *backing_file,
  6. int sectorsize, int alignment, int *bitmap_offset_out,
  7. unsigned long *bitmap_len_out, int *data_offset_out);
  8. extern int file_reader(__u64 offset, char *buf, int len, void *arg);
  9. extern int read_cow_header(int (*reader)(__u64, char *, int, void *),
  10. void *arg, __u32 *version_out,
  11. char **backing_file_out, long long *mtime_out,
  12. unsigned long long *size_out, int *sectorsize_out,
  13. __u32 *align_out, int *bitmap_offset_out);
  14. extern int write_cow_header(char *cow_file, int fd, char *backing_file,
  15. int sectorsize, int alignment,
  16. unsigned long long *size);
  17. extern void cow_sizes(int version, __u64 size, int sectorsize, int align,
  18. int bitmap_offset, unsigned long *bitmap_len_out,
  19. int *data_offset_out);
  20. #endif
  21. /*
  22. * ---------------------------------------------------------------------------
  23. * Local variables:
  24. * c-file-style: "linux"
  25. * End:
  26. */