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ff0b16a9 EP |
1 | #ifndef _LINUX_FANOTIFY_H |
2 | #define _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 /* Unwrittable file closed */ | |
10 | #define FAN_CLOSE_NOWRITE 0x00000010 /* Writtable file closed */ | |
11 | #define FAN_OPEN 0x00000020 /* File was opened */ | |
12 | ||
13 | #define FAN_EVENT_ON_CHILD 0x08000000 /* interested in child events */ | |
14 | ||
ff0b16a9 EP |
15 | #define FAN_Q_OVERFLOW 0x00004000 /* Event queued overflowed */ |
16 | ||
9e66e423 EP |
17 | #define FAN_OPEN_PERM 0x00010000 /* File open in perm check */ |
18 | #define FAN_ACCESS_PERM 0x00020000 /* File accessed in perm check */ | |
19 | ||
ff0b16a9 EP |
20 | /* helper events */ |
21 | #define FAN_CLOSE (FAN_CLOSE_WRITE | FAN_CLOSE_NOWRITE) /* close */ | |
22 | ||
2a3edf86 | 23 | /* flags used for fanotify_init() */ |
52c923dd EP |
24 | #define FAN_CLOEXEC 0x00000001 |
25 | #define FAN_NONBLOCK 0x00000002 | |
26 | ||
4231a235 EP |
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 | |
4231a235 EP |
31 | #define FAN_ALL_CLASS_BITS (FAN_CLASS_NOTIF | FAN_CLASS_CONTENT | \ |
32 | FAN_CLASS_PRE_CONTENT) | |
33 | ||
5dd03f55 | 34 | #define FAN_UNLIMITED_QUEUE 0x00000010 |
ac7e22dc | 35 | #define FAN_UNLIMITED_MARKS 0x00000020 |
5dd03f55 | 36 | |
4231a235 | 37 | #define FAN_ALL_INIT_FLAGS (FAN_CLOEXEC | FAN_NONBLOCK | \ |
ac7e22dc EP |
38 | FAN_ALL_CLASS_BITS | FAN_UNLIMITED_QUEUE |\ |
39 | FAN_UNLIMITED_MARKS) | |
2a3edf86 EP |
40 | |
41 | /* flags used for fanotify_modify_mark() */ | |
42 | #define FAN_MARK_ADD 0x00000001 | |
43 | #define FAN_MARK_REMOVE 0x00000002 | |
44 | #define FAN_MARK_DONT_FOLLOW 0x00000004 | |
45 | #define FAN_MARK_ONLYDIR 0x00000008 | |
eac8e9e8 | 46 | #define FAN_MARK_MOUNT 0x00000010 |
b9e4e3bd | 47 | #define FAN_MARK_IGNORED_MASK 0x00000020 |
c9778a98 | 48 | #define FAN_MARK_IGNORED_SURV_MODIFY 0x00000040 |
4d92604c | 49 | #define FAN_MARK_FLUSH 0x00000080 |
2a3edf86 EP |
50 | |
51 | #define FAN_ALL_MARK_FLAGS (FAN_MARK_ADD |\ | |
52 | FAN_MARK_REMOVE |\ | |
53 | FAN_MARK_DONT_FOLLOW |\ | |
0ff21db9 | 54 | FAN_MARK_ONLYDIR |\ |
b9e4e3bd | 55 | FAN_MARK_MOUNT |\ |
c9778a98 | 56 | FAN_MARK_IGNORED_MASK |\ |
bbf2aba5 EP |
57 | FAN_MARK_IGNORED_SURV_MODIFY |\ |
58 | FAN_MARK_FLUSH) | |
2a3edf86 | 59 | |
ff0b16a9 EP |
60 | /* |
61 | * All of the events - we build the list by hand so that we can add flags in | |
62 | * the future and not break backward compatibility. Apps will get only the | |
63 | * events that they originally wanted. Be sure to add new events here! | |
64 | */ | |
65 | #define FAN_ALL_EVENTS (FAN_ACCESS |\ | |
66 | FAN_MODIFY |\ | |
67 | FAN_CLOSE |\ | |
68 | FAN_OPEN) | |
69 | ||
9e66e423 EP |
70 | /* |
71 | * All events which require a permission response from userspace | |
72 | */ | |
73 | #define FAN_ALL_PERM_EVENTS (FAN_OPEN_PERM |\ | |
74 | FAN_ACCESS_PERM) | |
75 | ||
a1014f10 | 76 | #define FAN_ALL_OUTGOING_EVENTS (FAN_ALL_EVENTS |\ |
9e66e423 | 77 | FAN_ALL_PERM_EVENTS |\ |
a1014f10 EP |
78 | FAN_Q_OVERFLOW) |
79 | ||
0fb85621 | 80 | #define FANOTIFY_METADATA_VERSION 2 |
a1014f10 EP |
81 | |
82 | struct fanotify_event_metadata { | |
83 | __u32 event_len; | |
84 | __u32 vers; | |
28682019 | 85 | __aligned_u64 mask; |
0fb85621 TU |
86 | __s32 fd; |
87 | __s32 pid; | |
28682019 | 88 | }; |
a1014f10 | 89 | |
b2d87909 EP |
90 | struct fanotify_response { |
91 | __s32 fd; | |
92 | __u32 response; | |
93 | } __attribute__ ((packed)); | |
94 | ||
9e66e423 EP |
95 | /* Legit userspace responses to a _PERM event */ |
96 | #define FAN_ALLOW 0x01 | |
97 | #define FAN_DENY 0x02 | |
98 | ||
a1014f10 EP |
99 | /* Helper functions to deal with fanotify_event_metadata buffers */ |
100 | #define FAN_EVENT_METADATA_LEN (sizeof(struct fanotify_event_metadata)) | |
101 | ||
102 | #define FAN_EVENT_NEXT(meta, len) ((len) -= (meta)->event_len, \ | |
103 | (struct fanotify_event_metadata*)(((char *)(meta)) + \ | |
104 | (meta)->event_len)) | |
105 | ||
106 | #define FAN_EVENT_OK(meta, len) ((long)(len) >= (long)FAN_EVENT_METADATA_LEN && \ | |
107 | (long)(meta)->event_len >= (long)FAN_EVENT_METADATA_LEN && \ | |
108 | (long)(meta)->event_len <= (long)(len)) | |
109 | ||
ff0b16a9 | 110 | #endif /* _LINUX_FANOTIFY_H */ |