/arch/um/drivers/cow.h

https://bitbucket.org/evzijst/gittest · C Header · 42 lines · 28 code · 8 blank · 6 comment · 2 complexity · 262d28ca9970107d0516d2d0ac2cbbb2 MD5 · raw file 

    

  1. #ifndef __COW_H__
    2. 

  2. #define __COW_H__
    3. 

  3. 

  4. #include <asm/types.h>
    5. 

  5. 

  6. #if __BYTE_ORDER == __BIG_ENDIAN
    7. 

  7. # define ntohll(x) (x)
    8. 

  8. # define htonll(x) (x)
    9. 

  9. #elif __BYTE_ORDER == __LITTLE_ENDIAN
    10. 

  10. # define ntohll(x)  bswap_64(x)
    11. 

  11. # define htonll(x)  bswap_64(x)
    12. 

  12. #else
    13. 

  13. #error "__BYTE_ORDER not defined"
    14. 

  14. #endif
    15. 

  15. 

  16. extern int init_cow_file(int fd, char *cow_file, char *backing_file,
    17. 

  17. 			 int sectorsize, int alignment, int *bitmap_offset_out,
    18. 

  18. 			 unsigned long *bitmap_len_out, int *data_offset_out);
    19. 

  19. 

  20. extern int file_reader(__u64 offset, char *buf, int len, void *arg);
    21. 

  21. extern int read_cow_header(int (*reader)(__u64, char *, int, void *),
    22. 

  22. 			   void *arg, __u32 *version_out,
    23. 

  23. 			   char **backing_file_out, time_t *mtime_out,
    24. 

  24. 			   unsigned long long *size_out, int *sectorsize_out,
    25. 

  25. 			   __u32 *align_out, int *bitmap_offset_out);
    26. 

  26. 

  27. extern int write_cow_header(char *cow_file, int fd, char *backing_file,
    28. 

  28. 			    int sectorsize, int alignment,
    29. 

  29. 			    unsigned long long *size);
    30. 

  30. 

  31. extern void cow_sizes(int version, __u64 size, int sectorsize, int align,
    32. 

  32. 		      int bitmap_offset, unsigned long *bitmap_len_out,
    33. 

  33. 		      int *data_offset_out);
    34. 

  34. 

  35. #endif
    36. 

  36. 

  37. /*
    38. 

  38.  * ---------------------------------------------------------------------------
    39. 

  39.  * Local variables:
    40. 

  40.  * c-file-style: "linux"
    41. 

  41.  * End:
    42. 

  42.  */
    43.