include/linux/dnotify.h

   1 #ifndef _LINUX_DNOTIFY_H
   2 #define _LINUX_DNOTIFY_H
   3 /*
   4  * Directory notification for Linux
   5  *
   6  * Copyright (C) 2000,2002 Stephen Rothwell
   7  */
   8
   9 #include <linux/fs.h>
  10
  11 struct dnotify_struct {
  12         struct dnotify_struct * dn_next;
  13         unsigned long           dn_mask;
  14         int                     dn_fd;
  15         struct file *           dn_filp;
  16         fl_owner_t              dn_owner;
  17 };
  18
  19 #ifdef __KERNEL__
  20
  21
  22 #ifdef CONFIG_DNOTIFY
  23
  24 extern void __inode_dir_notify(struct inode *, unsigned long);
  25 extern void dnotify_flush(struct file *, fl_owner_t);
  26 extern int fcntl_dirnotify(int, struct file *, unsigned long);
  27 extern void dnotify_parent(struct dentry *, unsigned long);
  28
  29 static inline void inode_dir_notify(struct inode *inode, unsigned long event)
  30 {
  31         if (inode->i_dnotify_mask & (event))
  32                 __inode_dir_notify(inode, event);
  33 }
  34
  35 #else
  36
  37 static inline void __inode_dir_notify(struct inode *inode, unsigned long event)
  38 {
  39 }
  40
  41 static inline void dnotify_flush(struct file *filp, fl_owner_t id)
  42 {
  43 }
  44
  45 static inline int fcntl_dirnotify(int fd, struct file *filp, unsigned long arg)
  46 {
  47         return -EINVAL;
  48 }
  49
  50 static inline void dnotify_parent(struct dentry *dentry, unsigned long event)
  51 {
  52 }
  53
  54 static inline void inode_dir_notify(struct inode *inode, unsigned long event)
  55 {
  56 }
  57
  58 #endif /* CONFIG_DNOTIFY */
  59
  60 #endif /* __KERNEL __ */
  61
  62 #endif /* _LINUX_DNOTIFY_H */