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 /* Writtable file closed */
10 #define FAN_CLOSE_NOWRITE 0x00000010 /* Unwrittable file closed */
11 #define FAN_OPEN 0x00000020 /* File was opened */
13 #define FAN_Q_OVERFLOW 0x00004000 /* Event queued overflowed */
15 #define FAN_OPEN_PERM 0x00010000 /* File open in perm check */
16 #define FAN_ACCESS_PERM 0x00020000 /* File accessed in perm check */
18 #define FAN_ONDIR 0x40000000 /* event occurred against dir */
20 #define FAN_EVENT_ON_CHILD 0x08000000 /* interested in child events */
23 #define FAN_CLOSE (FAN_CLOSE_WRITE | FAN_CLOSE_NOWRITE) /* close */
25 /* flags used for fanotify_init() */
26 #define FAN_CLOEXEC 0x00000001
27 #define FAN_NONBLOCK 0x00000002
29 /* These are NOT bitwise flags. Both bits are used togther. */
30 #define FAN_CLASS_NOTIF 0x00000000
31 #define FAN_CLASS_CONTENT 0x00000004
32 #define FAN_CLASS_PRE_CONTENT 0x00000008
33 #define FAN_ALL_CLASS_BITS (FAN_CLASS_NOTIF | FAN_CLASS_CONTENT | \
34 FAN_CLASS_PRE_CONTENT)
36 #define FAN_UNLIMITED_QUEUE 0x00000010
37 #define FAN_UNLIMITED_MARKS 0x00000020
39 /* Attempt read-only open if read-write failed. */
40 #define FAN_READONLY_FALLBACK 0x00000040
42 #define FAN_ALL_INIT_FLAGS (FAN_CLOEXEC | FAN_NONBLOCK | \
43 FAN_ALL_CLASS_BITS | FAN_UNLIMITED_QUEUE |\
44 FAN_UNLIMITED_MARKS | FAN_READONLY_FALLBACK)
46 /* flags used for fanotify_modify_mark() */
47 #define FAN_MARK_ADD 0x00000001
48 #define FAN_MARK_REMOVE 0x00000002
49 #define FAN_MARK_DONT_FOLLOW 0x00000004
50 #define FAN_MARK_ONLYDIR 0x00000008
51 #define FAN_MARK_MOUNT 0x00000010
52 #define FAN_MARK_IGNORED_MASK 0x00000020
53 #define FAN_MARK_IGNORED_SURV_MODIFY 0x00000040
54 #define FAN_MARK_FLUSH 0x00000080
56 /* not valid from userspace, only kernel internal */
57 #define FAN_MARK_ONDIR 0x00000100
60 #define FAN_ALL_MARK_FLAGS (FAN_MARK_ADD |\
62 FAN_MARK_DONT_FOLLOW |\
65 FAN_MARK_IGNORED_MASK |\
66 FAN_MARK_IGNORED_SURV_MODIFY |\
70 * All of the events - we build the list by hand so that we can add flags in
71 * the future and not break backward compatibility. Apps will get only the
72 * events that they originally wanted. Be sure to add new events here!
74 #define FAN_ALL_EVENTS (FAN_ACCESS |\
80 * All events which require a permission response from userspace
82 #define FAN_ALL_PERM_EVENTS (FAN_OPEN_PERM |\
85 #define FAN_ALL_OUTGOING_EVENTS (FAN_ALL_EVENTS |\
86 FAN_ALL_PERM_EVENTS |\
89 #define FANOTIFY_METADATA_VERSION 3
91 struct fanotify_event_metadata
{
101 struct fanotify_response
{
106 /* Legit userspace responses to a _PERM event */
107 #define FAN_ALLOW 0x01
108 #define FAN_DENY 0x02
109 /* No fd set in event */
112 /* Helper functions to deal with fanotify_event_metadata buffers */
113 #define FAN_EVENT_METADATA_LEN (sizeof(struct fanotify_event_metadata))
115 #define FAN_EVENT_NEXT(meta, len) ((len) -= (meta)->event_len, \
116 (struct fanotify_event_metadata*)(((char *)(meta)) + \
119 #define FAN_EVENT_OK(meta, len) ((long)(len) >= (long)FAN_EVENT_METADATA_LEN && \
120 (long)(meta)->event_len >= (long)FAN_EVENT_METADATA_LEN && \
121 (long)(meta)->event_len <= (long)(len))
123 #endif /* _LINUX_FANOTIFY_H */