[net-next-2.6.git] / include / linux / fanotify.h

#ifndef _LINUX_FANOTIFY_H
#define _LINUX_FANOTIFY_H

#include <linux/types.h>

/* the following events that user-space can register for */
#define FAN_ACCESS		0x00000001	/* File was accessed */
#define FAN_MODIFY		0x00000002	/* File was modified */
#define FAN_CLOSE_WRITE		0x00000008	/* Unwrittable file closed */
#define FAN_CLOSE_NOWRITE	0x00000010	/* Writtable file closed */
#define FAN_OPEN		0x00000020	/* File was opened */

#define FAN_EVENT_ON_CHILD	0x08000000	/* interested in child events */

/* FIXME currently Q's have no limit.... */
#define FAN_Q_OVERFLOW		0x00004000	/* Event queued overflowed */

/* helper events */
#define FAN_CLOSE		(FAN_CLOSE_WRITE | FAN_CLOSE_NOWRITE) /* close */

/* flags used for fanotify_init() */
#define FAN_CLOEXEC		0x00000001
#define FAN_NONBLOCK		0x00000002

#define FAN_ALL_INIT_FLAGS	(FAN_CLOEXEC | FAN_NONBLOCK)

/* flags used for fanotify_modify_mark() */
#define FAN_MARK_ADD		0x00000001
#define FAN_MARK_REMOVE		0x00000002
#define FAN_MARK_DONT_FOLLOW	0x00000004
#define FAN_MARK_ONLYDIR	0x00000008

#define FAN_ALL_MARK_FLAGS	(FAN_MARK_ADD |\
				 FAN_MARK_REMOVE |\
				 FAN_MARK_DONT_FOLLOW |\
				 FAN_MARK_ONLYDIR)

/*
 * 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 FAN_ALL_EVENTS (FAN_ACCESS |\
			FAN_MODIFY |\
			FAN_CLOSE |\
			FAN_OPEN)

/*
 * All legal FAN bits userspace can request (although possibly not all
 * at the same time.
 */
#define FAN_ALL_INCOMING_EVENTS	(FAN_ALL_EVENTS |\
				 FAN_EVENT_ON_CHILD)

#define FAN_ALL_OUTGOING_EVENTS	(FAN_ALL_EVENTS |\
				 FAN_Q_OVERFLOW)

#define FANOTIFY_METADATA_VERSION	1

struct fanotify_event_metadata {
	__u32 event_len;
	__u32 vers;
	__s32 fd;
	__u64 mask;
} __attribute__ ((packed));

/* Helper functions to deal with fanotify_event_metadata buffers */
#define FAN_EVENT_METADATA_LEN (sizeof(struct fanotify_event_metadata))

#define FAN_EVENT_NEXT(meta, len) ((len) -= (meta)->event_len, \
				   (struct fanotify_event_metadata*)(((char *)(meta)) + \
				   (meta)->event_len))

#define FAN_EVENT_OK(meta, len)	((long)(len) >= (long)FAN_EVENT_METADATA_LEN && \
				(long)(meta)->event_len >= (long)FAN_EVENT_METADATA_LEN && \
				(long)(meta)->event_len <= (long)(len))

#ifdef __KERNEL__

#endif /* __KERNEL__ */
#endif /* _LINUX_FANOTIFY_H */
Commit	Line	Data
ff0b16a9 EP	1	#ifndef _LINUX_FANOTIFY_H
	2	#define _LINUX_FANOTIFY_H
	3
	4	#include <linux/types.h>
	5
	6	/* the following events that user-space can register for */
	7	#define FAN_ACCESS 0x00000001 /* File was accessed */
	8	#define FAN_MODIFY 0x00000002 /* File was modified */
	9	#define FAN_CLOSE_WRITE 0x00000008 /* Unwrittable file closed */
	10	#define FAN_CLOSE_NOWRITE 0x00000010 /* Writtable file closed */
	11	#define FAN_OPEN 0x00000020 /* File was opened */
	12
	13	#define FAN_EVENT_ON_CHILD 0x08000000 /* interested in child events */
	14
	15	/* FIXME currently Q's have no limit.... */
	16	#define FAN_Q_OVERFLOW 0x00004000 /* Event queued overflowed */
	17
	18	/* helper events */
	19	#define FAN_CLOSE (FAN_CLOSE_WRITE \| FAN_CLOSE_NOWRITE) /* close */
	20
2a3edf86	21	/* flags used for fanotify_init() */
52c923dd EP	22	#define FAN_CLOEXEC 0x00000001
	23	#define FAN_NONBLOCK 0x00000002
	24
	25	#define FAN_ALL_INIT_FLAGS (FAN_CLOEXEC \| FAN_NONBLOCK)
2a3edf86 EP	26
	27	/* flags used for fanotify_modify_mark() */
	28	#define FAN_MARK_ADD 0x00000001
	29	#define FAN_MARK_REMOVE 0x00000002
	30	#define FAN_MARK_DONT_FOLLOW 0x00000004
	31	#define FAN_MARK_ONLYDIR 0x00000008
	32
	33	#define FAN_ALL_MARK_FLAGS (FAN_MARK_ADD \|\
	34	FAN_MARK_REMOVE \|\
	35	FAN_MARK_DONT_FOLLOW \|\
	36	FAN_MARK_ONLYDIR)
	37
ff0b16a9 EP	38	/*
	39	* All of the events - we build the list by hand so that we can add flags in
	40	* the future and not break backward compatibility. Apps will get only the
	41	* events that they originally wanted. Be sure to add new events here!
	42	*/
	43	#define FAN_ALL_EVENTS (FAN_ACCESS \|\
	44	FAN_MODIFY \|\
	45	FAN_CLOSE \|\
	46	FAN_OPEN)
	47
	48	/*
	49	* All legal FAN bits userspace can request (although possibly not all
	50	* at the same time.
	51	*/
	52	#define FAN_ALL_INCOMING_EVENTS (FAN_ALL_EVENTS \|\
	53	FAN_EVENT_ON_CHILD)
a1014f10 EP	54
	55	#define FAN_ALL_OUTGOING_EVENTS (FAN_ALL_EVENTS \|\
	56	FAN_Q_OVERFLOW)
	57
	58	#define FANOTIFY_METADATA_VERSION 1
	59
	60	struct fanotify_event_metadata {
	61	__u32 event_len;
	62	__u32 vers;
	63	__s32 fd;
	64	__u64 mask;
	65	} __attribute__ ((packed));
	66
	67	/* Helper functions to deal with fanotify_event_metadata buffers */
	68	#define FAN_EVENT_METADATA_LEN (sizeof(struct fanotify_event_metadata))
	69
	70	#define FAN_EVENT_NEXT(meta, len) ((len) -= (meta)->event_len, \
	71	(struct fanotify_event_metadata)(((char )(meta)) + \
	72	(meta)->event_len))
	73
	74	#define FAN_EVENT_OK(meta, len) ((long)(len) >= (long)FAN_EVENT_METADATA_LEN && \
	75	(long)(meta)->event_len >= (long)FAN_EVENT_METADATA_LEN && \
	76	(long)(meta)->event_len <= (long)(len))
	77
ff0b16a9 EP	78	#ifdef __KERNEL__
	79
	80	#endif /* __KERNEL__ */
	81	#endif /* _LINUX_FANOTIFY_H */