1 #ifndef _LINUX_FANOTIFY_H
2 #define _LINUX_FANOTIFY_H
4 #include <linux/types.h>
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 */
13 #define FAN_EVENT_ON_CHILD 0x08000000 /* interested in child events */
15 /* FIXME currently Q's have no limit.... */
16 #define FAN_Q_OVERFLOW 0x00004000 /* Event queued overflowed */
18 #define FAN_OPEN_PERM 0x00010000 /* File open in perm check */
19 #define FAN_ACCESS_PERM 0x00020000 /* File accessed in perm check */
22 #define FAN_CLOSE (FAN_CLOSE_WRITE | FAN_CLOSE_NOWRITE) /* close */
24 /* flags used for fanotify_init() */
25 #define FAN_CLOEXEC 0x00000001
26 #define FAN_NONBLOCK 0x00000002
28 #define FAN_ALL_INIT_FLAGS (FAN_CLOEXEC | FAN_NONBLOCK)
30 /* flags used for fanotify_modify_mark() */
31 #define FAN_MARK_ADD 0x00000001
32 #define FAN_MARK_REMOVE 0x00000002
33 #define FAN_MARK_DONT_FOLLOW 0x00000004
34 #define FAN_MARK_ONLYDIR 0x00000008
35 #define FAN_MARK_MOUNT 0x00000010
36 #define FAN_MARK_IGNORED_MASK 0x00000020
37 #define FAN_MARK_IGNORED_SURV_MODIFY 0x00000040
38 #define FAN_MARK_FLUSH 0x00000080
40 #define FAN_ALL_MARK_FLAGS (FAN_MARK_ADD |\
42 FAN_MARK_DONT_FOLLOW |\
45 FAN_MARK_IGNORED_MASK |\
46 FAN_MARK_IGNORED_SURV_MODIFY)
49 * All of the events - we build the list by hand so that we can add flags in
50 * the future and not break backward compatibility. Apps will get only the
51 * events that they originally wanted. Be sure to add new events here!
53 #define FAN_ALL_EVENTS (FAN_ACCESS |\
59 * All events which require a permission response from userspace
61 #define FAN_ALL_PERM_EVENTS (FAN_OPEN_PERM |\
64 #define FAN_ALL_OUTGOING_EVENTS (FAN_ALL_EVENTS |\
65 FAN_ALL_PERM_EVENTS |\
68 #define FANOTIFY_METADATA_VERSION 2
70 struct fanotify_event_metadata {
76 } __attribute__ ((packed));
78 struct fanotify_response {
81 } __attribute__ ((packed));
83 /* Legit userspace responses to a _PERM event */
84 #define FAN_ALLOW 0x01
87 /* Helper functions to deal with fanotify_event_metadata buffers */
88 #define FAN_EVENT_METADATA_LEN (sizeof(struct fanotify_event_metadata))
90 #define FAN_EVENT_NEXT(meta, len) ((len) -= (meta)->event_len, \
91 (struct fanotify_event_metadata*)(((char *)(meta)) + \
94 #define FAN_EVENT_OK(meta, len) ((long)(len) >= (long)FAN_EVENT_METADATA_LEN && \
95 (long)(meta)->event_len >= (long)FAN_EVENT_METADATA_LEN && \
96 (long)(meta)->event_len <= (long)(len))
98 #endif /* _LINUX_FANOTIFY_H */