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- #ifndef _UAPI_LINUX_FANOTIFY_H
- #define _UAPI_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 /* Writtable file closed */
- #define FAN_CLOSE_NOWRITE 0x00000010 /* Unwrittable file closed */
- #define FAN_OPEN 0x00000020 /* File was opened */
- #define FAN_Q_OVERFLOW 0x00004000 /* Event queued overflowed */
- #define FAN_OPEN_PERM 0x00010000 /* File open in perm check */
- #define FAN_ACCESS_PERM 0x00020000 /* File accessed in perm check */
- #define FAN_ONDIR 0x40000000 /* event occurred against dir */
- #define FAN_EVENT_ON_CHILD 0x08000000 /* interested in child events */
- /* 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
- /* These are NOT bitwise flags. Both bits are used togther. */
- #define FAN_CLASS_NOTIF 0x00000000
- #define FAN_CLASS_CONTENT 0x00000004
- #define FAN_CLASS_PRE_CONTENT 0x00000008
- #define FAN_ALL_CLASS_BITS (FAN_CLASS_NOTIF | FAN_CLASS_CONTENT | \
- FAN_CLASS_PRE_CONTENT)
- #define FAN_UNLIMITED_QUEUE 0x00000010
- #define FAN_UNLIMITED_MARKS 0x00000020
- #define FAN_ALL_INIT_FLAGS (FAN_CLOEXEC | FAN_NONBLOCK | \
- FAN_ALL_CLASS_BITS | FAN_UNLIMITED_QUEUE |\
- FAN_UNLIMITED_MARKS)
- /* 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_MARK_MOUNT 0x00000010
- #define FAN_MARK_IGNORED_MASK 0x00000020
- #define FAN_MARK_IGNORED_SURV_MODIFY 0x00000040
- #define FAN_MARK_FLUSH 0x00000080
- #define FAN_ALL_MARK_FLAGS (FAN_MARK_ADD |\
- FAN_MARK_REMOVE |\
- FAN_MARK_DONT_FOLLOW |\
- FAN_MARK_ONLYDIR |\
- FAN_MARK_MOUNT |\
- FAN_MARK_IGNORED_MASK |\
- FAN_MARK_IGNORED_SURV_MODIFY |\
- FAN_MARK_FLUSH)
- /*
- * 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 events which require a permission response from userspace
- */
- #define FAN_ALL_PERM_EVENTS (FAN_OPEN_PERM |\
- FAN_ACCESS_PERM)
- #define FAN_ALL_OUTGOING_EVENTS (FAN_ALL_EVENTS |\
- FAN_ALL_PERM_EVENTS |\
- FAN_Q_OVERFLOW)
- #define FANOTIFY_METADATA_VERSION 3
- struct fanotify_event_metadata {
- __u32 event_len;
- __u8 vers;
- __u8 reserved;
- __u16 metadata_len;
- __aligned_u64 mask;
- __s32 fd;
- __s32 pid;
- };
- struct fanotify_response {
- __s32 fd;
- __u32 response;
- };
- /* Legit userspace responses to a _PERM event */
- #define FAN_ALLOW 0x01
- #define FAN_DENY 0x02
- /* No fd set in event */
- #define FAN_NOFD -1
- /* 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))
- #endif /* _UAPI_LINUX_FANOTIFY_H */
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