diff options
Diffstat (limited to 'include/linux/fanotify.h')
-rw-r--r-- | include/linux/fanotify.h | 105 |
1 files changed, 105 insertions, 0 deletions
diff --git a/include/linux/fanotify.h b/include/linux/fanotify.h new file mode 100644 index 000000000000..f0949a57ca9d --- /dev/null +++ b/include/linux/fanotify.h | |||
@@ -0,0 +1,105 @@ | |||
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 | |||
15 | /* FIXME currently Q's have no limit.... */ | ||
16 | #define FAN_Q_OVERFLOW 0x00004000 /* Event queued overflowed */ | ||
17 | |||
18 | #define FAN_OPEN_PERM 0x00010000 /* File open in perm check */ | ||
19 | #define FAN_ACCESS_PERM 0x00020000 /* File accessed in perm check */ | ||
20 | |||
21 | /* helper events */ | ||
22 | #define FAN_CLOSE (FAN_CLOSE_WRITE | FAN_CLOSE_NOWRITE) /* close */ | ||
23 | |||
24 | /* flags used for fanotify_init() */ | ||
25 | #define FAN_CLOEXEC 0x00000001 | ||
26 | #define FAN_NONBLOCK 0x00000002 | ||
27 | |||
28 | #define FAN_ALL_INIT_FLAGS (FAN_CLOEXEC | FAN_NONBLOCK) | ||
29 | |||
30 | /* flags used for fanotify_modify_mark() */ | ||
31 | #define FAN_MARK_ADD 0x00000001 | ||
32 | #define FAN_MARK_REMOVE 0x00000002 | ||
33 | #define FAN_MARK_DONT_FOLLOW 0x00000004 | ||
34 | #define FAN_MARK_ONLYDIR 0x00000008 | ||
35 | #define FAN_MARK_MOUNT 0x00000010 | ||
36 | #define FAN_MARK_IGNORED_MASK 0x00000020 | ||
37 | #define FAN_MARK_IGNORED_SURV_MODIFY 0x00000040 | ||
38 | #define FAN_MARK_FLUSH 0x00000080 | ||
39 | |||
40 | #define FAN_ALL_MARK_FLAGS (FAN_MARK_ADD |\ | ||
41 | FAN_MARK_REMOVE |\ | ||
42 | FAN_MARK_DONT_FOLLOW |\ | ||
43 | FAN_MARK_ONLYDIR |\ | ||
44 | FAN_MARK_MOUNT |\ | ||
45 | FAN_MARK_IGNORED_MASK |\ | ||
46 | FAN_MARK_IGNORED_SURV_MODIFY) | ||
47 | |||
48 | /* | ||
49 | * All of the events - we build the list by hand so that we can add flags in | ||
50 | * the future and not break backward compatibility. Apps will get only the | ||
51 | * events that they originally wanted. Be sure to add new events here! | ||
52 | */ | ||
53 | #define FAN_ALL_EVENTS (FAN_ACCESS |\ | ||
54 | FAN_MODIFY |\ | ||
55 | FAN_CLOSE |\ | ||
56 | FAN_OPEN) | ||
57 | |||
58 | /* | ||
59 | * All events which require a permission response from userspace | ||
60 | */ | ||
61 | #define FAN_ALL_PERM_EVENTS (FAN_OPEN_PERM |\ | ||
62 | FAN_ACCESS_PERM) | ||
63 | |||
64 | #define FAN_ALL_OUTGOING_EVENTS (FAN_ALL_EVENTS |\ | ||
65 | FAN_ALL_PERM_EVENTS |\ | ||
66 | FAN_Q_OVERFLOW) | ||
67 | |||
68 | #define FANOTIFY_METADATA_VERSION 1 | ||
69 | |||
70 | struct fanotify_event_metadata { | ||
71 | __u32 event_len; | ||
72 | __u32 vers; | ||
73 | __s32 fd; | ||
74 | __u64 mask; | ||
75 | __s64 pid; | ||
76 | } __attribute__ ((packed)); | ||
77 | |||
78 | struct fanotify_response { | ||
79 | __s32 fd; | ||
80 | __u32 response; | ||
81 | } __attribute__ ((packed)); | ||
82 | |||
83 | /* Legit userspace responses to a _PERM event */ | ||
84 | #define FAN_ALLOW 0x01 | ||
85 | #define FAN_DENY 0x02 | ||
86 | |||
87 | /* Helper functions to deal with fanotify_event_metadata buffers */ | ||
88 | #define FAN_EVENT_METADATA_LEN (sizeof(struct fanotify_event_metadata)) | ||
89 | |||
90 | #define FAN_EVENT_NEXT(meta, len) ((len) -= (meta)->event_len, \ | ||
91 | (struct fanotify_event_metadata*)(((char *)(meta)) + \ | ||
92 | (meta)->event_len)) | ||
93 | |||
94 | #define FAN_EVENT_OK(meta, len) ((long)(len) >= (long)FAN_EVENT_METADATA_LEN && \ | ||
95 | (long)(meta)->event_len >= (long)FAN_EVENT_METADATA_LEN && \ | ||
96 | (long)(meta)->event_len <= (long)(len)) | ||
97 | |||
98 | #ifdef __KERNEL__ | ||
99 | |||
100 | struct fanotify_wait { | ||
101 | struct fsnotify_event *event; | ||
102 | __s32 fd; | ||
103 | }; | ||
104 | #endif /* __KERNEL__ */ | ||
105 | #endif /* _LINUX_FANOTIFY_H */ | ||