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 #define FAN_Q_OVERFLOW 0x00004000 /* Event queued overflowed */
17 #define FAN_OPEN_PERM 0x00010000 /* File open in perm check */
18 #define FAN_ACCESS_PERM 0x00020000 /* File accessed in perm check */
21 #define FAN_CLOSE (FAN_CLOSE_WRITE | FAN_CLOSE_NOWRITE) /* close */
23 /* flags used for fanotify_init() */
24 #define FAN_CLOEXEC 0x00000001
25 #define FAN_NONBLOCK 0x00000002
27 /* These are NOT bitwise flags. Both bits are used togther. */
28 #define FAN_CLASS_NOTIF 0x00000000
29 #define FAN_CLASS_CONTENT 0x00000004
30 #define FAN_CLASS_PRE_CONTENT 0x00000008
31 #define FAN_ALL_CLASS_BITS (FAN_CLASS_NOTIF | FAN_CLASS_CONTENT | \
32 FAN_CLASS_PRE_CONTENT)
34 #define FAN_UNLIMITED_QUEUE 0x00000010
36 #define FAN_ALL_INIT_FLAGS (FAN_CLOEXEC | FAN_NONBLOCK | \
37 FAN_ALL_CLASS_BITS | FAN_UNLIMITED_QUEUE)
39 /* flags used for fanotify_modify_mark() */
40 #define FAN_MARK_ADD 0x00000001
41 #define FAN_MARK_REMOVE 0x00000002
42 #define FAN_MARK_DONT_FOLLOW 0x00000004
43 #define FAN_MARK_ONLYDIR 0x00000008
44 #define FAN_MARK_MOUNT 0x00000010
45 #define FAN_MARK_IGNORED_MASK 0x00000020
46 #define FAN_MARK_IGNORED_SURV_MODIFY 0x00000040
47 #define FAN_MARK_FLUSH 0x00000080
49 #define FAN_ALL_MARK_FLAGS (FAN_MARK_ADD |\
51 FAN_MARK_DONT_FOLLOW |\
54 FAN_MARK_IGNORED_MASK |\
55 FAN_MARK_IGNORED_SURV_MODIFY |\
59 * All of the events - we build the list by hand so that we can add flags in
60 * the future and not break backward compatibility. Apps will get only the
61 * events that they originally wanted. Be sure to add new events here!
63 #define FAN_ALL_EVENTS (FAN_ACCESS |\
69 * All events which require a permission response from userspace
71 #define FAN_ALL_PERM_EVENTS (FAN_OPEN_PERM |\
74 #define FAN_ALL_OUTGOING_EVENTS (FAN_ALL_EVENTS |\
75 FAN_ALL_PERM_EVENTS |\
78 #define FANOTIFY_METADATA_VERSION 2
80 struct fanotify_event_metadata {
88 struct fanotify_response {
91 } __attribute__ ((packed));
93 /* Legit userspace responses to a _PERM event */
94 #define FAN_ALLOW 0x01
97 /* Helper functions to deal with fanotify_event_metadata buffers */
98 #define FAN_EVENT_METADATA_LEN (sizeof(struct fanotify_event_metadata))
100 #define FAN_EVENT_NEXT(meta, len) ((len) -= (meta)->event_len, \
101 (struct fanotify_event_metadata*)(((char *)(meta)) + \
104 #define FAN_EVENT_OK(meta, len) ((long)(len) >= (long)FAN_EVENT_METADATA_LEN && \
105 (long)(meta)->event_len >= (long)FAN_EVENT_METADATA_LEN && \
106 (long)(meta)->event_len <= (long)(len))
108 #endif /* _LINUX_FANOTIFY_H */