arch/um/drivers/cow.h

   1 #ifndef __COW_H__
   2 #define __COW_H__
   3
   4 #include <asm/types.h>
   5
   6 extern int init_cow_file(int fd, char *cow_file, char *backing_file,
   7                          int sectorsize, int alignment, int *bitmap_offset_out,
   8                          unsigned long *bitmap_len_out, int *data_offset_out);
   9
  10 extern int file_reader(__u64 offset, char *buf, int len, void *arg);
  11 extern int read_cow_header(int (*reader)(__u64, char *, int, void *),
  12                            void *arg, __u32 *version_out,
  13                            char **backing_file_out, time_t *mtime_out,
  14                            unsigned long long *size_out, int *sectorsize_out,
  15                            __u32 *align_out, int *bitmap_offset_out);
  16
  17 extern int write_cow_header(char *cow_file, int fd, char *backing_file,
  18                             int sectorsize, int alignment,
  19                             unsigned long long *size);
  20
  21 extern void cow_sizes(int version, __u64 size, int sectorsize, int align,
  22                       int bitmap_offset, unsigned long *bitmap_len_out,
  23                       int *data_offset_out);
  24
  25 #endif
  26
  27 /*
  28  * ---------------------------------------------------------------------------
  29  * Local variables:
  30  * c-file-style: "linux"
  31  * End:
  32  */