fs/reiser4/plugin/item/internal.h

   1 /* Copyright 2001, 2002, 2003 by Hans Reiser, licensing governed by reiser4/README */
   2 /* Internal item contains down-link to the child of the internal/twig
   3    node in a tree. It is internal items that are actually used during
   4    tree traversal. */
   5
   6 #if !defined( __FS_REISER4_PLUGIN_ITEM_INTERNAL_H__ )
   7 #define __FS_REISER4_PLUGIN_ITEM_INTERNAL_H__
   8
   9 #include "../../forward.h"
  10 #include "../../dformat.h"
  11
  12 /* on-disk layout of internal item */
  13 typedef struct internal_item_layout {
  14         /*  0 */ reiser4_dblock_nr pointer;
  15         /*  4 */
  16 } internal_item_layout;
  17
  18 struct cut_list;
  19
  20 int mergeable_internal(const coord_t * p1, const coord_t * p2);
  21 lookup_result lookup_internal(const reiser4_key * key, lookup_bias bias,
  22                               coord_t * coord);
  23 /* store pointer from internal item into "block". Implementation of
  24     ->down_link() method */
  25 extern void down_link_internal(const coord_t * coord, const reiser4_key * key,
  26                                reiser4_block_nr * block);
  27 extern int has_pointer_to_internal(const coord_t * coord,
  28                                    const reiser4_block_nr * block);
  29 extern int create_hook_internal(const coord_t * item, void *arg);
  30 extern int kill_hook_internal(const coord_t * item, pos_in_node_t from,
  31                               pos_in_node_t count, struct carry_kill_data *);
  32 extern int shift_hook_internal(const coord_t * item, unsigned from,
  33                                unsigned count, znode * old_node);
  34 extern void reiser4_print_internal(const char *prefix, coord_t * coord);
  35
  36 extern int utmost_child_internal(const coord_t * coord, sideof side,
  37                                  jnode ** child);
  38 int utmost_child_real_block_internal(const coord_t * coord, sideof side,
  39                                      reiser4_block_nr * block);
  40
  41 extern void reiser4_update_internal(const coord_t * coord,
  42                                     const reiser4_block_nr * blocknr);
  43 /* FIXME: reiserfs has check_internal */
  44 extern int check__internal(const coord_t * coord, const char **error);
  45
  46 /* __FS_REISER4_PLUGIN_ITEM_INTERNAL_H__ */
  47 #endif
  48
  49 /* Make Linus happy.
  50    Local variables:
  51    c-indentation-style: "K&R"
  52    mode-name: "LC"
  53    c-basic-offset: 8
  54    tab-width: 8
  55    fill-column: 120
  56    End:
  57 */