Warning: That file was not part of the compilation database. It may have many parsing errors.

1/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
2#ifndef _LINUX_FANOTIFY_H
3#define _LINUX_FANOTIFY_H
4
5#include <linux/types.h>
6
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 */
13
14#define FAN_Q_OVERFLOW 0x00004000 /* Event queued overflowed */
15
16#define FAN_OPEN_PERM 0x00010000 /* File open in perm check */
17#define FAN_ACCESS_PERM 0x00020000 /* File accessed in perm check */
18
19#define FAN_ONDIR 0x40000000 /* event occurred against dir */
20
21#define FAN_EVENT_ON_CHILD 0x08000000 /* interested in child events */
22
23/* helper events */
24#define FAN_CLOSE (FAN_CLOSE_WRITE | FAN_CLOSE_NOWRITE) /* close */
25
26/* flags used for fanotify_init() */
27#define FAN_CLOEXEC 0x00000001
28#define FAN_NONBLOCK 0x00000002
29
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)
36
37#define FAN_UNLIMITED_QUEUE 0x00000010
38#define FAN_UNLIMITED_MARKS 0x00000020
39#define FAN_ENABLE_AUDIT 0x00000040
40
41#define FAN_ALL_INIT_FLAGS (FAN_CLOEXEC | FAN_NONBLOCK | \
42 FAN_ALL_CLASS_BITS | FAN_UNLIMITED_QUEUE |\
43 FAN_UNLIMITED_MARKS)
44
45/* flags used for fanotify_modify_mark() */
46#define FAN_MARK_ADD 0x00000001
47#define FAN_MARK_REMOVE 0x00000002
48#define FAN_MARK_DONT_FOLLOW 0x00000004
49#define FAN_MARK_ONLYDIR 0x00000008
50#define FAN_MARK_MOUNT 0x00000010
51#define FAN_MARK_IGNORED_MASK 0x00000020
52#define FAN_MARK_IGNORED_SURV_MODIFY 0x00000040
53#define FAN_MARK_FLUSH 0x00000080
54
55#define FAN_ALL_MARK_FLAGS (FAN_MARK_ADD |\
56 FAN_MARK_REMOVE |\
57 FAN_MARK_DONT_FOLLOW |\
58 FAN_MARK_ONLYDIR |\
59 FAN_MARK_MOUNT |\
60 FAN_MARK_IGNORED_MASK |\
61 FAN_MARK_IGNORED_SURV_MODIFY |\
62 FAN_MARK_FLUSH)
63
64/*
65 * All of the events - we build the list by hand so that we can add flags in
66 * the future and not break backward compatibility. Apps will get only the
67 * events that they originally wanted. Be sure to add new events here!
68 */
69#define FAN_ALL_EVENTS (FAN_ACCESS |\
70 FAN_MODIFY |\
71 FAN_CLOSE |\
72 FAN_OPEN)
73
74/*
75 * All events which require a permission response from userspace
76 */
77#define FAN_ALL_PERM_EVENTS (FAN_OPEN_PERM |\
78 FAN_ACCESS_PERM)
79
80#define FAN_ALL_OUTGOING_EVENTS (FAN_ALL_EVENTS |\
81 FAN_ALL_PERM_EVENTS |\
82 FAN_Q_OVERFLOW)
83
84#define FANOTIFY_METADATA_VERSION 3
85
86struct fanotify_event_metadata {
87 __u32 event_len;
88 __u8 vers;
89 __u8 reserved;
90 __u16 metadata_len;
91 __aligned_u64 mask;
92 __s32 fd;
93 __s32 pid;
94};
95
96struct fanotify_response {
97 __s32 fd;
98 __u32 response;
99};
100
101/* Legit userspace responses to a _PERM event */
102#define FAN_ALLOW 0x01
103#define FAN_DENY 0x02
104#define FAN_AUDIT 0x10 /* Bit mask to create audit record for result */
105
106/* No fd set in event */
107#define FAN_NOFD -1
108
109/* Helper functions to deal with fanotify_event_metadata buffers */
110#define FAN_EVENT_METADATA_LEN (sizeof(struct fanotify_event_metadata))
111
112#define FAN_EVENT_NEXT(meta, len) ((len) -= (meta)->event_len, \
113 (struct fanotify_event_metadata*)(((char *)(meta)) + \
114 (meta)->event_len))
115
116#define FAN_EVENT_OK(meta, len) ((long)(len) >= (long)FAN_EVENT_METADATA_LEN && \
117 (long)(meta)->event_len >= (long)FAN_EVENT_METADATA_LEN && \
118 (long)(meta)->event_len <= (long)(len))
119
120#endif /* _LINUX_FANOTIFY_H */
121

Warning: That file was not part of the compilation database. It may have many parsing errors.