headers/private/kernel/file_cache.h

   1 /*
   2  * Copyright 2004-2008, Axel Dörfler, axeld@pinc-software.de.
   3  * Distributed under the terms of the MIT License.
   4  */
   5 #ifndef _KERNEL_FILE_CACHE_H
   6 #define _KERNEL_FILE_CACHE_H
   7
   8
   9 #include <vfs.h>
  10 #include <vm/vm_types.h>
  11 #include <module.h>
  12
  13
  14 // temporary/optional cache syscall API
  15 #define CACHE_SYSCALLS "cache"
  16
  17 #define CACHE_CLEAR                     1       // takes no parameters
  18 #define CACHE_SET_MODULE        2       // gets the module name as parameter
  19
  20 #define CACHE_MODULES_NAME      "file_cache"
  21
  22 #define FILE_CACHE_SEQUENTIAL_ACCESS    0x01
  23 #define FILE_CACHE_LOADED_COMPLETELY    0x02
  24 #define FILE_CACHE_NO_IO                                0x04
  25
  26 struct cache_module_info {
  27         module_info     info;
  28
  29         void (*node_opened)(struct vnode *vnode, int32 fdType, dev_t mountID,
  30                                 ino_t parentID, ino_t vnodeID, const char *name, off_t size);
  31         void (*node_closed)(struct vnode *vnode, int32 fdType, dev_t mountID,
  32                                 ino_t vnodeID, int32 accessType);
  33         void (*node_launched)(size_t argCount, char * const *args);
  34 };
  35
  36 #ifdef __cplusplus
  37 extern "C" {
  38 #endif
  39
  40 extern void cache_node_opened(struct vnode *vnode, int32 fdType, VMCache *cache,
  41                                 dev_t mountID, ino_t parentID, ino_t vnodeID, const char *name);
  42 extern void cache_node_closed(struct vnode *vnode, int32 fdType, VMCache *cache,
  43                                 dev_t mountID, ino_t vnodeID);
  44 extern void cache_node_launched(size_t argCount, char * const *args);
  45 extern void cache_prefetch_vnode(struct vnode *vnode, off_t offset, size_t size);
  46 extern void cache_prefetch(dev_t mountID, ino_t vnodeID, off_t offset, size_t size);
  47
  48 extern status_t file_map_init(void);
  49 extern status_t file_cache_init_post_boot_device(void);
  50 extern status_t file_cache_init(void);
  51
  52 #ifdef __cplusplus
  53 }
  54 #endif
  55
  56 #endif  /* _KRENEL_FILE_CACHE_H */