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1 | #ifndef _UAPI_LINUX_FANOTIFY_H |
2 | #define _UAPI_LINUX_FANOTIFY_H | |
3 | ||
4 | #include <linux/types.h> | |
5 | ||
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 */ | |
12 | ||
13 | #define FAN_Q_OVERFLOW 0x00004000 /* Event queued overflowed */ | |
14 | ||
15 | #define FAN_OPEN_PERM 0x00010000 /* File open in perm check */ | |
16 | #define FAN_ACCESS_PERM 0x00020000 /* File accessed in perm check */ | |
17 | ||
18 | #define FAN_ONDIR 0x40000000 /* event occurred against dir */ | |
19 | ||
20 | #define FAN_EVENT_ON_CHILD 0x08000000 /* interested in child events */ | |
21 | ||
22 | /* helper events */ | |
23 | #define FAN_CLOSE (FAN_CLOSE_WRITE | FAN_CLOSE_NOWRITE) /* close */ | |
24 | ||
25 | /* flags used for fanotify_init() */ | |
26 | #define FAN_CLOEXEC 0x00000001 | |
27 | #define FAN_NONBLOCK 0x00000002 | |
28 | ||
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) | |
35 | ||
36 | #define FAN_UNLIMITED_QUEUE 0x00000010 | |
37 | #define FAN_UNLIMITED_MARKS 0x00000020 | |
38 | ||
39 | #define FAN_ALL_INIT_FLAGS (FAN_CLOEXEC | FAN_NONBLOCK | \ | |
40 | FAN_ALL_CLASS_BITS | FAN_UNLIMITED_QUEUE |\ | |
41 | FAN_UNLIMITED_MARKS) | |
42 | ||
43 | /* flags used for fanotify_modify_mark() */ | |
44 | #define FAN_MARK_ADD 0x00000001 | |
45 | #define FAN_MARK_REMOVE 0x00000002 | |
46 | #define FAN_MARK_DONT_FOLLOW 0x00000004 | |
47 | #define FAN_MARK_ONLYDIR 0x00000008 | |
48 | #define FAN_MARK_MOUNT 0x00000010 | |
49 | #define FAN_MARK_IGNORED_MASK 0x00000020 | |
50 | #define FAN_MARK_IGNORED_SURV_MODIFY 0x00000040 | |
51 | #define FAN_MARK_FLUSH 0x00000080 | |
52 | ||
53 | #define FAN_ALL_MARK_FLAGS (FAN_MARK_ADD |\ | |
54 | FAN_MARK_REMOVE |\ | |
55 | FAN_MARK_DONT_FOLLOW |\ | |
56 | FAN_MARK_ONLYDIR |\ | |
57 | FAN_MARK_MOUNT |\ | |
58 | FAN_MARK_IGNORED_MASK |\ | |
59 | FAN_MARK_IGNORED_SURV_MODIFY |\ | |
60 | FAN_MARK_FLUSH) | |
61 | ||
62 | /* | |
63 | * All of the events - we build the list by hand so that we can add flags in | |
64 | * the future and not break backward compatibility. Apps will get only the | |
65 | * events that they originally wanted. Be sure to add new events here! | |
66 | */ | |
67 | #define FAN_ALL_EVENTS (FAN_ACCESS |\ | |
68 | FAN_MODIFY |\ | |
69 | FAN_CLOSE |\ | |
70 | FAN_OPEN) | |
71 | ||
72 | /* | |
73 | * All events which require a permission response from userspace | |
74 | */ | |
75 | #define FAN_ALL_PERM_EVENTS (FAN_OPEN_PERM |\ | |
76 | FAN_ACCESS_PERM) | |
77 | ||
78 | #define FAN_ALL_OUTGOING_EVENTS (FAN_ALL_EVENTS |\ | |
79 | FAN_ALL_PERM_EVENTS |\ | |
80 | FAN_Q_OVERFLOW) | |
81 | ||
82 | #define FANOTIFY_METADATA_VERSION 3 | |
83 | ||
84 | struct fanotify_event_metadata { | |
85 | __u32 event_len; | |
86 | __u8 vers; | |
87 | __u8 reserved; | |
88 | __u16 metadata_len; | |
89 | __aligned_u64 mask; | |
90 | __s32 fd; | |
91 | __s32 pid; | |
92 | }; | |
93 | ||
94 | struct fanotify_response { | |
95 | __s32 fd; | |
96 | __u32 response; | |
97 | }; | |
98 | ||
99 | /* Legit userspace responses to a _PERM event */ | |
100 | #define FAN_ALLOW 0x01 | |
101 | #define FAN_DENY 0x02 | |
102 | /* No fd set in event */ | |
103 | #define FAN_NOFD -1 | |
104 | ||
105 | /* Helper functions to deal with fanotify_event_metadata buffers */ | |
106 | #define FAN_EVENT_METADATA_LEN (sizeof(struct fanotify_event_metadata)) | |
107 | ||
108 | #define FAN_EVENT_NEXT(meta, len) ((len) -= (meta)->event_len, \ | |
109 | (struct fanotify_event_metadata*)(((char *)(meta)) + \ | |
110 | (meta)->event_len)) | |
111 | ||
112 | #define FAN_EVENT_OK(meta, len) ((long)(len) >= (long)FAN_EVENT_METADATA_LEN && \ | |
113 | (long)(meta)->event_len >= (long)FAN_EVENT_METADATA_LEN && \ | |
114 | (long)(meta)->event_len <= (long)(len)) | |
115 | ||
116 | #endif /* _UAPI_LINUX_FANOTIFY_H */ |