michael@0: #ifndef _LINUX_FANOTIFY_H
michael@0: #define _LINUX_FANOTIFY_H
michael@0: 
michael@0: /* This is a Linux header generated by "make headers_install" */
michael@0: 
michael@0: #include <linux/types.h>
michael@0: 
michael@0: /* the following events that user-space can register for */
michael@0: #define FAN_ACCESS		0x00000001	/* File was accessed */
michael@0: #define FAN_MODIFY		0x00000002	/* File was modified */
michael@0: #define FAN_CLOSE_WRITE		0x00000008	/* Writtable file closed */
michael@0: #define FAN_CLOSE_NOWRITE	0x00000010	/* Unwrittable file closed */
michael@0: #define FAN_OPEN		0x00000020	/* File was opened */
michael@0: 
michael@0: #define FAN_Q_OVERFLOW		0x00004000	/* Event queued overflowed */
michael@0: 
michael@0: #define FAN_OPEN_PERM		0x00010000	/* File open in perm check */
michael@0: #define FAN_ACCESS_PERM		0x00020000	/* File accessed in perm check */
michael@0: 
michael@0: #define FAN_ONDIR		0x40000000	/* event occurred against dir */
michael@0: 
michael@0: #define FAN_EVENT_ON_CHILD	0x08000000	/* interested in child events */
michael@0: 
michael@0: /* helper events */
michael@0: #define FAN_CLOSE		(FAN_CLOSE_WRITE | FAN_CLOSE_NOWRITE) /* close */
michael@0: 
michael@0: /* flags used for fanotify_init() */
michael@0: #define FAN_CLOEXEC		0x00000001
michael@0: #define FAN_NONBLOCK		0x00000002
michael@0: 
michael@0: /* These are NOT bitwise flags.  Both bits are used togther.  */
michael@0: #define FAN_CLASS_NOTIF		0x00000000
michael@0: #define FAN_CLASS_CONTENT	0x00000004
michael@0: #define FAN_CLASS_PRE_CONTENT	0x00000008
michael@0: #define FAN_ALL_CLASS_BITS	(FAN_CLASS_NOTIF | FAN_CLASS_CONTENT | \
michael@0: 				 FAN_CLASS_PRE_CONTENT)
michael@0: 
michael@0: #define FAN_UNLIMITED_QUEUE	0x00000010
michael@0: #define FAN_UNLIMITED_MARKS	0x00000020
michael@0: 
michael@0: #define FAN_ALL_INIT_FLAGS	(FAN_CLOEXEC | FAN_NONBLOCK | \
michael@0: 				 FAN_ALL_CLASS_BITS | FAN_UNLIMITED_QUEUE |\
michael@0: 				 FAN_UNLIMITED_MARKS)
michael@0: 
michael@0: /* flags used for fanotify_modify_mark() */
michael@0: #define FAN_MARK_ADD		0x00000001
michael@0: #define FAN_MARK_REMOVE		0x00000002
michael@0: #define FAN_MARK_DONT_FOLLOW	0x00000004
michael@0: #define FAN_MARK_ONLYDIR	0x00000008
michael@0: #define FAN_MARK_MOUNT		0x00000010
michael@0: #define FAN_MARK_IGNORED_MASK	0x00000020
michael@0: #define FAN_MARK_IGNORED_SURV_MODIFY	0x00000040
michael@0: #define FAN_MARK_FLUSH		0x00000080
michael@0: 
michael@0: #define FAN_ALL_MARK_FLAGS	(FAN_MARK_ADD |\
michael@0: 				 FAN_MARK_REMOVE |\
michael@0: 				 FAN_MARK_DONT_FOLLOW |\
michael@0: 				 FAN_MARK_ONLYDIR |\
michael@0: 				 FAN_MARK_MOUNT |\
michael@0: 				 FAN_MARK_IGNORED_MASK |\
michael@0: 				 FAN_MARK_IGNORED_SURV_MODIFY |\
michael@0: 				 FAN_MARK_FLUSH)
michael@0: 
michael@0: /*
michael@0:  * All of the events - we build the list by hand so that we can add flags in
michael@0:  * the future and not break backward compatibility.  Apps will get only the
michael@0:  * events that they originally wanted.  Be sure to add new events here!
michael@0:  */
michael@0: #define FAN_ALL_EVENTS (FAN_ACCESS |\
michael@0: 			FAN_MODIFY |\
michael@0: 			FAN_CLOSE |\
michael@0: 			FAN_OPEN)
michael@0: 
michael@0: /*
michael@0:  * All events which require a permission response from userspace
michael@0:  */
michael@0: #define FAN_ALL_PERM_EVENTS (FAN_OPEN_PERM |\
michael@0: 			     FAN_ACCESS_PERM)
michael@0: 
michael@0: #define FAN_ALL_OUTGOING_EVENTS	(FAN_ALL_EVENTS |\
michael@0: 				 FAN_ALL_PERM_EVENTS |\
michael@0: 				 FAN_Q_OVERFLOW)
michael@0: 
michael@0: #define FANOTIFY_METADATA_VERSION	3
michael@0: 
michael@0: struct fanotify_event_metadata {
michael@0: 	__u32 event_len;
michael@0: 	__u8 vers;
michael@0: 	__u8 reserved;
michael@0: 	__u16 metadata_len;
michael@0: 	__u64 mask;
michael@0: 	__s32 fd;
michael@0: 	__s32 pid;
michael@0: };
michael@0: 
michael@0: struct fanotify_response {
michael@0: 	__s32 fd;
michael@0: 	__u32 response;
michael@0: };
michael@0: 
michael@0: /* Legit userspace responses to a _PERM event */
michael@0: #define FAN_ALLOW	0x01
michael@0: #define FAN_DENY	0x02
michael@0: /* No fd set in event */
michael@0: #define FAN_NOFD	-1
michael@0: 
michael@0: /* Helper functions to deal with fanotify_event_metadata buffers */
michael@0: #define FAN_EVENT_METADATA_LEN (sizeof(struct fanotify_event_metadata))
michael@0: 
michael@0: #define FAN_EVENT_NEXT(meta, len) ((len) -= (meta)->event_len, \
michael@0: 				   (struct fanotify_event_metadata*)(((char *)(meta)) + \
michael@0: 				   (meta)->event_len))
michael@0: 
michael@0: #define FAN_EVENT_OK(meta, len)	((long)(len) >= (long)FAN_EVENT_METADATA_LEN && \
michael@0: 				(long)(meta)->event_len >= (long)FAN_EVENT_METADATA_LEN && \
michael@0: 				(long)(meta)->event_len <= (long)(len))
michael@0: 
michael@0: #endif /* _LINUX_FANOTIFY_H */