fs/reiser4/seal.h

   1 /* Copyright 2002, 2003 by Hans Reiser, licensing governed by reiser4/README */
   2
   3 /* Declaration of seals: "weak" tree pointers. See seal.c for comments. */
   4
   5 #ifndef __SEAL_H__
   6 #define __SEAL_H__
   7
   8 #include "forward.h"
   9 #include "debug.h"
  10 #include "dformat.h"
  11 #include "key.h"
  12 #include "coord.h"
  13
  14 /* for __u?? types */
  15 /*#include <linux/types.h>*/
  16
  17 /* seal. See comment at the top of seal.c */
  18 typedef struct seal_s {
  19         /* version of znode recorder at the time of seal creation */
  20         __u64 version;
  21         /* block number of znode attached to this seal */
  22         reiser4_block_nr block;
  23 #if REISER4_DEBUG
  24         /* coord this seal is attached to. For debugging. */
  25         coord_t coord1;
  26         /* key this seal is attached to. For debugging. */
  27         reiser4_key key;
  28 #endif
  29 } seal_t;
  30
  31 extern void reiser4_seal_init(seal_t *, const coord_t *, const reiser4_key *);
  32 extern void reiser4_seal_done(seal_t *);
  33 extern int reiser4_seal_is_set(const seal_t *);
  34 extern int reiser4_seal_validate(seal_t *, coord_t *,
  35                          const reiser4_key *, lock_handle * ,
  36                          znode_lock_mode mode, znode_lock_request request);
  37
  38 /* __SEAL_H__ */
  39 #endif
  40
  41 /* Make Linus happy.
  42    Local variables:
  43    c-indentation-style: "K&R"
  44    mode-name: "LC"
  45    c-basic-offset: 8
  46    tab-width: 8
  47    fill-column: 120
  48    End:
  49 */