Eric Lee / smarc-fsl-linux-kernel

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arch/um/drivers/cow.h 1.84 KB
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1da177e4c   Linus Torvalds   Linux-2.6.12-rc2 
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  #ifndef __COW_H__
  #define __COW_H__
  
  #include <asm/types.h>
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  #if defined(__KERNEL__)
  
  # include <asm/byteorder.h>
  
  # if defined(__BIG_ENDIAN)
  #	define ntohll(x) (x)
  #	define htonll(x) (x)
  # elif defined(__LITTLE_ENDIAN)
  #	define ntohll(x)  be64_to_cpu(x)
  #	define htonll(x)  cpu_to_be64(x)
  # else
  #	error "Could not determine byte order"
  # endif
  
  #else
  /* For the definition of ntohl, htonl and __BYTE_ORDER */
  #include <endian.h>
  #include <netinet/in.h>
  #if defined(__BYTE_ORDER)
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  #  if __BYTE_ORDER == __BIG_ENDIAN
  #	define ntohll(x) (x)
  #	define htonll(x) (x)
  #  elif __BYTE_ORDER == __LITTLE_ENDIAN
  #	define ntohll(x)  bswap_64(x)
  #	define htonll(x)  bswap_64(x)
  #  else
  #	error "Could not determine byte order: __BYTE_ORDER uncorrectly defined"
  #  endif
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  #else  /* ! defined(__BYTE_ORDER) */
  #	error "Could not determine byte order: __BYTE_ORDER not defined"
1da177e4c   Linus Torvalds   Linux-2.6.12-rc2 
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  #endif
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  #endif /* ! defined(__KERNEL__) */
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  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, time_t *mtime_out,
52c737823   Paolo 'Blaisorblade' Giarrusso   [PATCH] uml: avoi... 
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  			   unsigned long long *size_out, int *sectorsize_out,
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  			   __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
  
  /*
   * ---------------------------------------------------------------------------
   * Local variables:
   * c-file-style: "linux"
   * End:
   */