]>
git.proxmox.com Git - mirror_ubuntu-bionic-kernel.git/blob - include/uapi/linux/fanotify.h
1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
2 #ifndef _UAPI_LINUX_FANOTIFY_H
3 #define _UAPI_LINUX_FANOTIFY_H
5 #include <linux/types.h>
7 /* the following events that user-space can register for */
8 #define FAN_ACCESS 0x00000001 /* File was accessed */
9 #define FAN_MODIFY 0x00000002 /* File was modified */
10 #define FAN_CLOSE_WRITE 0x00000008 /* Writtable file closed */
11 #define FAN_CLOSE_NOWRITE 0x00000010 /* Unwrittable file closed */
12 #define FAN_OPEN 0x00000020 /* File was opened */
14 #define FAN_Q_OVERFLOW 0x00004000 /* Event queued overflowed */
16 #define FAN_OPEN_PERM 0x00010000 /* File open in perm check */
17 #define FAN_ACCESS_PERM 0x00020000 /* File accessed in perm check */
19 #define FAN_ONDIR 0x40000000 /* event occurred against dir */
21 #define FAN_EVENT_ON_CHILD 0x08000000 /* interested in child events */
24 #define FAN_CLOSE (FAN_CLOSE_WRITE | FAN_CLOSE_NOWRITE) /* close */
26 /* flags used for fanotify_init() */
27 #define FAN_CLOEXEC 0x00000001
28 #define FAN_NONBLOCK 0x00000002
30 /* These are NOT bitwise flags. Both bits are used togther. */
31 #define FAN_CLASS_NOTIF 0x00000000
32 #define FAN_CLASS_CONTENT 0x00000004
33 #define FAN_CLASS_PRE_CONTENT 0x00000008
34 #define FAN_ALL_CLASS_BITS (FAN_CLASS_NOTIF | FAN_CLASS_CONTENT | \
35 FAN_CLASS_PRE_CONTENT)
37 #define FAN_UNLIMITED_QUEUE 0x00000010
38 #define FAN_UNLIMITED_MARKS 0x00000020
40 #define FAN_ALL_INIT_FLAGS (FAN_CLOEXEC | FAN_NONBLOCK | \
41 FAN_ALL_CLASS_BITS | FAN_UNLIMITED_QUEUE |\
44 /* flags used for fanotify_modify_mark() */
45 #define FAN_MARK_ADD 0x00000001
46 #define FAN_MARK_REMOVE 0x00000002
47 #define FAN_MARK_DONT_FOLLOW 0x00000004
48 #define FAN_MARK_ONLYDIR 0x00000008
49 #define FAN_MARK_MOUNT 0x00000010
50 #define FAN_MARK_IGNORED_MASK 0x00000020
51 #define FAN_MARK_IGNORED_SURV_MODIFY 0x00000040
52 #define FAN_MARK_FLUSH 0x00000080
54 #define FAN_ALL_MARK_FLAGS (FAN_MARK_ADD |\
56 FAN_MARK_DONT_FOLLOW |\
59 FAN_MARK_IGNORED_MASK |\
60 FAN_MARK_IGNORED_SURV_MODIFY |\
64 * All of the events - we build the list by hand so that we can add flags in
65 * the future and not break backward compatibility. Apps will get only the
66 * events that they originally wanted. Be sure to add new events here!
68 #define FAN_ALL_EVENTS (FAN_ACCESS |\
74 * All events which require a permission response from userspace
76 #define FAN_ALL_PERM_EVENTS (FAN_OPEN_PERM |\
79 #define FAN_ALL_OUTGOING_EVENTS (FAN_ALL_EVENTS |\
80 FAN_ALL_PERM_EVENTS |\
83 #define FANOTIFY_METADATA_VERSION 3
85 struct fanotify_event_metadata
{
95 struct fanotify_response
{
100 /* Legit userspace responses to a _PERM event */
101 #define FAN_ALLOW 0x01
102 #define FAN_DENY 0x02
103 /* No fd set in event */
106 /* Helper functions to deal with fanotify_event_metadata buffers */
107 #define FAN_EVENT_METADATA_LEN (sizeof(struct fanotify_event_metadata))
109 #define FAN_EVENT_NEXT(meta, len) ((len) -= (meta)->event_len, \
110 (struct fanotify_event_metadata*)(((char *)(meta)) + \
113 #define FAN_EVENT_OK(meta, len) ((long)(len) >= (long)FAN_EVENT_METADATA_LEN && \
114 (long)(meta)->event_len >= (long)FAN_EVENT_METADATA_LEN && \
115 (long)(meta)->event_len <= (long)(len))
117 #endif /* _UAPI_LINUX_FANOTIFY_H */