include/linux/inotify.h - kernel/msm-4.9 - Gitiles

 /*
  * Inode based directory notification for Linux
  *
  * Copyright (C) 2005 John McCutchan
  */

 #ifndef _LINUX_INOTIFY_H
 #define _LINUX_INOTIFY_H

 /* For O_CLOEXEC and O_NONBLOCK */
 #include <linux/fcntl.h>
 #include <linux/types.h>

 /*
  * struct inotify_event - structure read from the inotify device for each event
  *
  * When you are watching a directory, you will receive the filename for events
  * such as IN_CREATE, IN_DELETE, IN_OPEN, IN_CLOSE, ..., relative to the wd.
  */
 struct inotify_event {
 	__s32		wd;		/* watch descriptor */
 	__u32		mask;		/* watch mask */
 	__u32		cookie;		/* cookie to synchronize two events */
 	__u32		len;		/* length (including nulls) of name */
 	char		name[0];	/* stub for possible name */
 };

 /* the following are legal, implemented events that user-space can watch for */
 #define IN_ACCESS		0x00000001	/* File was accessed */
 #define IN_MODIFY		0x00000002	/* File was modified */
 #define IN_ATTRIB		0x00000004	/* Metadata changed */
 #define IN_CLOSE_WRITE		0x00000008	/* Writtable file was closed */
 #define IN_CLOSE_NOWRITE	0x00000010	/* Unwrittable file closed */
 #define IN_OPEN			0x00000020	/* File was opened */
 #define IN_MOVED_FROM		0x00000040	/* File was moved from X */
 #define IN_MOVED_TO		0x00000080	/* File was moved to Y */
 #define IN_CREATE		0x00000100	/* Subfile was created */
 #define IN_DELETE		0x00000200	/* Subfile was deleted */
 #define IN_DELETE_SELF		0x00000400	/* Self was deleted */
 #define IN_MOVE_SELF		0x00000800	/* Self was moved */

 /* the following are legal events.  they are sent as needed to any watch */
 #define IN_UNMOUNT		0x00002000	/* Backing fs was unmounted */
 #define IN_Q_OVERFLOW		0x00004000	/* Event queued overflowed */
 #define IN_IGNORED		0x00008000	/* File was ignored */

 /* helper events */
 #define IN_CLOSE		(IN_CLOSE_WRITE | IN_CLOSE_NOWRITE) /* close */
 #define IN_MOVE			(IN_MOVED_FROM | IN_MOVED_TO) /* moves */

 /* special flags */
 #define IN_ONLYDIR		0x01000000	/* only watch the path if it is a directory */
 #define IN_DONT_FOLLOW		0x02000000	/* don't follow a sym link */
 #define IN_MASK_ADD		0x20000000	/* add to the mask of an already existing watch */
 #define IN_ISDIR		0x40000000	/* event occurred against dir */
 #define IN_ONESHOT		0x80000000	/* only send event once */

 /*
  * All of the events - we build the list by hand so that we can add flags in
  * the future and not break backward compatibility.  Apps will get only the
  * events that they originally wanted.  Be sure to add new events here!
  */
 #define IN_ALL_EVENTS	(IN_ACCESS | IN_MODIFY | IN_ATTRIB | IN_CLOSE_WRITE | \
 			 IN_CLOSE_NOWRITE | IN_OPEN | IN_MOVED_FROM | \
 			 IN_MOVED_TO | IN_DELETE | IN_CREATE | IN_DELETE_SELF | \
 			 IN_MOVE_SELF)

 /* Flags for sys_inotify_init1.  */
 #define IN_CLOEXEC O_CLOEXEC
 #define IN_NONBLOCK O_NONBLOCK

 #ifdef __KERNEL__

 #include <linux/dcache.h>
 #include <linux/fs.h>

 /*
  * struct inotify_watch - represents a watch request on a specific inode
  *
  * h_list is protected by ih->mutex of the associated inotify_handle.
  * i_list, mask are protected by inode->inotify_mutex of the associated inode.
  * ih, inode, and wd are never written to once the watch is created.
  *
  * Callers must use the established inotify interfaces to access inotify_watch
  * contents.  The content of this structure is private to the inotify
  * implementation.
  */
 struct inotify_watch {
 	struct list_head	h_list;	/* entry in inotify_handle's list */
 	struct list_head	i_list;	/* entry in inode's list */
 	atomic_t		count;	/* reference count */
 	struct inotify_handle	*ih;	/* associated inotify handle */
 	struct inode		*inode;	/* associated inode */
 	__s32			wd;	/* watch descriptor */
 	__u32			mask;	/* event mask for this watch */
 };

 struct inotify_operations {
 	void (*handle_event)(struct inotify_watch *, u32, u32, u32,
 			     const char *, struct inode *);
 	void (*destroy_watch)(struct inotify_watch *);
 };

 #ifdef CONFIG_INOTIFY

 /* Kernel API for producing events */

 extern void inotify_d_instantiate(struct dentry *, struct inode *);
 extern void inotify_d_move(struct dentry *);
 extern void inotify_inode_queue_event(struct inode *, __u32, __u32,
 				      const char *, struct inode *);
 extern void inotify_dentry_parent_queue_event(struct dentry *, __u32, __u32,
 					      const char *);
 extern void inotify_unmount_inodes(struct list_head *);
 extern void inotify_inode_is_dead(struct inode *);
 extern u32 inotify_get_cookie(void);

 /* Kernel Consumer API */

 extern struct inotify_handle *inotify_init(const struct inotify_operations *);
 extern void inotify_init_watch(struct inotify_watch *);
 extern void inotify_destroy(struct inotify_handle *);
 extern __s32 inotify_find_watch(struct inotify_handle *, struct inode *,
 				struct inotify_watch **);
 extern __s32 inotify_find_update_watch(struct inotify_handle *, struct inode *,
 				       u32);
 extern __s32 inotify_add_watch(struct inotify_handle *, struct inotify_watch *,
 			       struct inode *, __u32);
 extern __s32 inotify_clone_watch(struct inotify_watch *, struct inotify_watch *);
 extern void inotify_evict_watch(struct inotify_watch *);
 extern int inotify_rm_watch(struct inotify_handle *, struct inotify_watch *);
 extern int inotify_rm_wd(struct inotify_handle *, __u32);
 extern void inotify_remove_watch_locked(struct inotify_handle *,
 					struct inotify_watch *);
 extern void get_inotify_watch(struct inotify_watch *);
 extern void put_inotify_watch(struct inotify_watch *);
 extern int pin_inotify_watch(struct inotify_watch *);
 extern void unpin_inotify_watch(struct inotify_watch *);

 #else

 static inline void inotify_d_instantiate(struct dentry *dentry,
 					struct inode *inode)
 {
 }

 static inline void inotify_d_move(struct dentry *dentry)
 {
 }

 static inline void inotify_inode_queue_event(struct inode *inode,
 					     __u32 mask, __u32 cookie,
 					     const char *filename,
 					     struct inode *n_inode)
 {
 }

 static inline void inotify_dentry_parent_queue_event(struct dentry *dentry,
 						     __u32 mask, __u32 cookie,
 						     const char *filename)
 {
 }

 static inline void inotify_unmount_inodes(struct list_head *list)
 {
 }

 static inline void inotify_inode_is_dead(struct inode *inode)
 {
 }

 static inline u32 inotify_get_cookie(void)
 {
 	return 0;
 }

 static inline struct inotify_handle *inotify_init(const struct inotify_operations *ops)
 {
 	return ERR_PTR(-EOPNOTSUPP);
 }

 static inline void inotify_init_watch(struct inotify_watch *watch)
 {
 }

 static inline void inotify_destroy(struct inotify_handle *ih)
 {
 }

 static inline __s32 inotify_find_watch(struct inotify_handle *ih, struct inode *inode,
 				       struct inotify_watch **watchp)
 {
 	return -EOPNOTSUPP;
 }

 static inline __s32 inotify_find_update_watch(struct inotify_handle *ih,
 					      struct inode *inode, u32 mask)
 {
 	return -EOPNOTSUPP;
 }

 static inline __s32 inotify_add_watch(struct inotify_handle *ih,
 				      struct inotify_watch *watch,
 				      struct inode *inode, __u32 mask)
 {
 	return -EOPNOTSUPP;
 }

 static inline int inotify_rm_watch(struct inotify_handle *ih,
 				   struct inotify_watch *watch)
 {
 	return -EOPNOTSUPP;
 }

 static inline int inotify_rm_wd(struct inotify_handle *ih, __u32 wd)
 {
 	return -EOPNOTSUPP;
 }

 static inline void inotify_remove_watch_locked(struct inotify_handle *ih,
 					       struct inotify_watch *watch)
 {
 }

 static inline void get_inotify_watch(struct inotify_watch *watch)
 {
 }

 static inline void put_inotify_watch(struct inotify_watch *watch)
 {
 }

 extern inline int pin_inotify_watch(struct inotify_watch *watch)
 {
 	return 0;
 }

 extern inline void unpin_inotify_watch(struct inotify_watch *watch)
 {
 }

 #endif	/* CONFIG_INOTIFY */

 #endif	/* __KERNEL __ */

 #endif	/* _LINUX_INOTIFY_H */
	/*
	* Inode based directory notification for Linux
	*
	* Copyright (C) 2005 John McCutchan
	*/

	#ifndef _LINUX_INOTIFY_H
	#define _LINUX_INOTIFY_H

	/* For O_CLOEXEC and O_NONBLOCK */
	#include <linux/fcntl.h>
	#include <linux/types.h>

	/*
	* struct inotify_event - structure read from the inotify device for each event
	*
	* When you are watching a directory, you will receive the filename for events
	* such as IN_CREATE, IN_DELETE, IN_OPEN, IN_CLOSE, ..., relative to the wd.
	*/
	struct inotify_event {
	__s32 wd; /* watch descriptor */
	__u32 mask; /* watch mask */
	__u32 cookie; /* cookie to synchronize two events */
	__u32 len; /* length (including nulls) of name */
	char name[0]; /* stub for possible name */
	};

	/* the following are legal, implemented events that user-space can watch for */
	#define IN_ACCESS 0x00000001 /* File was accessed */
	#define IN_MODIFY 0x00000002 /* File was modified */
	#define IN_ATTRIB 0x00000004 /* Metadata changed */
	#define IN_CLOSE_WRITE 0x00000008 /* Writtable file was closed */
	#define IN_CLOSE_NOWRITE 0x00000010 /* Unwrittable file closed */
	#define IN_OPEN 0x00000020 /* File was opened */
	#define IN_MOVED_FROM 0x00000040 /* File was moved from X */
	#define IN_MOVED_TO 0x00000080 /* File was moved to Y */
	#define IN_CREATE 0x00000100 /* Subfile was created */
	#define IN_DELETE 0x00000200 /* Subfile was deleted */
	#define IN_DELETE_SELF 0x00000400 /* Self was deleted */
	#define IN_MOVE_SELF 0x00000800 /* Self was moved */

	/* the following are legal events. they are sent as needed to any watch */
	#define IN_UNMOUNT 0x00002000 /* Backing fs was unmounted */
	#define IN_Q_OVERFLOW 0x00004000 /* Event queued overflowed */
	#define IN_IGNORED 0x00008000 /* File was ignored */

	/* helper events */
	#define IN_CLOSE (IN_CLOSE_WRITE \| IN_CLOSE_NOWRITE) /* close */
	#define IN_MOVE (IN_MOVED_FROM \| IN_MOVED_TO) /* moves */

	/* special flags */
	#define IN_ONLYDIR 0x01000000 /* only watch the path if it is a directory */
	#define IN_DONT_FOLLOW 0x02000000 /* don't follow a sym link */
	#define IN_MASK_ADD 0x20000000 /* add to the mask of an already existing watch */
	#define IN_ISDIR 0x40000000 /* event occurred against dir */
	#define IN_ONESHOT 0x80000000 /* only send event once */

	/*
	* All of the events - we build the list by hand so that we can add flags in
	* the future and not break backward compatibility. Apps will get only the
	* events that they originally wanted. Be sure to add new events here!
	*/
	#define IN_ALL_EVENTS (IN_ACCESS \| IN_MODIFY \| IN_ATTRIB \| IN_CLOSE_WRITE \| \
	IN_CLOSE_NOWRITE \| IN_OPEN \| IN_MOVED_FROM \| \
	IN_MOVED_TO \| IN_DELETE \| IN_CREATE \| IN_DELETE_SELF \| \
	IN_MOVE_SELF)

	/* Flags for sys_inotify_init1. */
	#define IN_CLOEXEC O_CLOEXEC
	#define IN_NONBLOCK O_NONBLOCK

	#ifdef __KERNEL__

	#include <linux/dcache.h>
	#include <linux/fs.h>

	/*
	* struct inotify_watch - represents a watch request on a specific inode
	*
	* h_list is protected by ih->mutex of the associated inotify_handle.
	* i_list, mask are protected by inode->inotify_mutex of the associated inode.
	* ih, inode, and wd are never written to once the watch is created.
	*
	* Callers must use the established inotify interfaces to access inotify_watch
	* contents. The content of this structure is private to the inotify
	* implementation.
	*/
	struct inotify_watch {
	struct list_head h_list; /* entry in inotify_handle's list */
	struct list_head i_list; /* entry in inode's list */
	atomic_t count; /* reference count */
	struct inotify_handle ih; / associated inotify handle */
	struct inode inode; / associated inode */
	__s32 wd; /* watch descriptor */
	__u32 mask; /* event mask for this watch */
	};

	struct inotify_operations {
	void (handle_event)(struct inotify_watch , u32, u32, u32,
	const char , struct inode );
	void (destroy_watch)(struct inotify_watch );
	};

	#ifdef CONFIG_INOTIFY

	/* Kernel API for producing events */

	extern void inotify_d_instantiate(struct dentry , struct inode );
	extern void inotify_d_move(struct dentry *);
	extern void inotify_inode_queue_event(struct inode *, __u32, __u32,
	const char , struct inode );
	extern void inotify_dentry_parent_queue_event(struct dentry *, __u32, __u32,
	const char *);
	extern void inotify_unmount_inodes(struct list_head *);
	extern void inotify_inode_is_dead(struct inode *);
	extern u32 inotify_get_cookie(void);

	/* Kernel Consumer API */

	extern struct inotify_handle inotify_init(const struct inotify_operations );
	extern void inotify_init_watch(struct inotify_watch *);
	extern void inotify_destroy(struct inotify_handle *);
	extern __s32 inotify_find_watch(struct inotify_handle , struct inode ,
	struct inotify_watch **);
	extern __s32 inotify_find_update_watch(struct inotify_handle , struct inode ,
	u32);
	extern __s32 inotify_add_watch(struct inotify_handle , struct inotify_watch ,
	struct inode *, __u32);
	extern __s32 inotify_clone_watch(struct inotify_watch , struct inotify_watch );
	extern void inotify_evict_watch(struct inotify_watch *);
	extern int inotify_rm_watch(struct inotify_handle , struct inotify_watch );
	extern int inotify_rm_wd(struct inotify_handle *, __u32);
	extern void inotify_remove_watch_locked(struct inotify_handle *,
	struct inotify_watch *);
	extern void get_inotify_watch(struct inotify_watch *);
	extern void put_inotify_watch(struct inotify_watch *);
	extern int pin_inotify_watch(struct inotify_watch *);
	extern void unpin_inotify_watch(struct inotify_watch *);

	#else

	static inline void inotify_d_instantiate(struct dentry *dentry,
	struct inode *inode)
	{
	}

	static inline void inotify_d_move(struct dentry *dentry)
	{
	}

	static inline void inotify_inode_queue_event(struct inode *inode,
	__u32 mask, __u32 cookie,
	const char *filename,
	struct inode *n_inode)
	{
	}

	static inline void inotify_dentry_parent_queue_event(struct dentry *dentry,
	__u32 mask, __u32 cookie,
	const char *filename)
	{
	}

	static inline void inotify_unmount_inodes(struct list_head *list)
	{
	}

	static inline void inotify_inode_is_dead(struct inode *inode)
	{
	}

	static inline u32 inotify_get_cookie(void)
	{
	return 0;
	}

	static inline struct inotify_handle inotify_init(const struct inotify_operations ops)
	{
	return ERR_PTR(-EOPNOTSUPP);
	}

	static inline void inotify_init_watch(struct inotify_watch *watch)
	{
	}

	static inline void inotify_destroy(struct inotify_handle *ih)
	{
	}

	static inline __s32 inotify_find_watch(struct inotify_handle ih, struct inode inode,
	struct inotify_watch **watchp)
	{
	return -EOPNOTSUPP;
	}

	static inline __s32 inotify_find_update_watch(struct inotify_handle *ih,
	struct inode *inode, u32 mask)
	{
	return -EOPNOTSUPP;
	}

	static inline __s32 inotify_add_watch(struct inotify_handle *ih,
	struct inotify_watch *watch,
	struct inode *inode, __u32 mask)
	{
	return -EOPNOTSUPP;
	}

	static inline int inotify_rm_watch(struct inotify_handle *ih,
	struct inotify_watch *watch)
	{
	return -EOPNOTSUPP;
	}

	static inline int inotify_rm_wd(struct inotify_handle *ih, __u32 wd)
	{
	return -EOPNOTSUPP;
	}

	static inline void inotify_remove_watch_locked(struct inotify_handle *ih,
	struct inotify_watch *watch)
	{
	}

	static inline void get_inotify_watch(struct inotify_watch *watch)
	{
	}

	static inline void put_inotify_watch(struct inotify_watch *watch)
	{
	}

	extern inline int pin_inotify_watch(struct inotify_watch *watch)
	{
	return 0;
	}

	extern inline void unpin_inotify_watch(struct inotify_watch *watch)
	{
	}

	#endif /* CONFIG_INOTIFY */

	#endif /* __KERNEL __ */

	#endif /* _LINUX_INOTIFY_H */