fs/reiser4/plugin/compress/compress.h

   1 #if !defined( __FS_REISER4_COMPRESS_H__ )
   2 #define __FS_REISER4_COMPRESS_H__
   3
   4 #include <linux/types.h>
   5 #include <linux/string.h>
   6
   7 /* transform direction */
   8 typedef enum {
   9         TFMA_READ,   /* decrypt, decompress */
  10         TFMA_WRITE,  /* encrypt, compress */
  11         TFMA_LAST
  12 } tfm_action;
  13
  14 /* supported compression algorithms */
  15 typedef enum {
  16         LZO1_COMPRESSION_ID,
  17         GZIP1_COMPRESSION_ID,
  18         LAST_COMPRESSION_ID,
  19 } reiser4_compression_id;
  20
  21 /* the same as pgoff, but units are page clusters */
  22 typedef unsigned long cloff_t;
  23
  24 /* working data of a (de)compression algorithm */
  25 typedef void *coa_t;
  26
  27 /* table for all supported (de)compression algorithms */
  28 typedef coa_t coa_set[LAST_COMPRESSION_ID][TFMA_LAST];
  29
  30 __u32 reiser4_adler32(char *data, __u32 len);
  31
  32 #endif                          /* __FS_REISER4_COMPRESS_H__ */
  33
  34 /* Make Linus happy.
  35    Local variables:
  36    c-indentation-style: "K&R"
  37    mode-name: "LC"
  38    c-basic-offset: 8
  39    tab-width: 8
  40    fill-column: 120
  41    scroll-step: 1
  42    End:
  43 */