fanotify: permissions and blocking

[firefly-linux-kernel-4.4.55.git] / include / linux / fanotify.h

diff --git a/include/linux/fanotify.h b/include/linux/fanotify.h
index 385896c9f8289ec4f5dc38f72f9d26bb7ac1e718..02f80676c23820480700b284622f3584a388c0a9 100644 (file)
--- a/include/linux/fanotify.h
+++ b/include/linux/fanotify.h
@@ -15,6 +15,9 @@
 /* FIXME currently Q's have no limit.... */
 #define FAN_Q_OVERFLOW         0x00004000      /* Event queued overflowed */
 
+#define FAN_OPEN_PERM          0x00010000      /* File open in perm check */
+#define FAN_ACCESS_PERM                0x00020000      /* File accessed in perm check */
+
 /* helper events */
 #define FAN_CLOSE              (FAN_CLOSE_WRITE | FAN_CLOSE_NOWRITE) /* close */
 
@@ -52,7 +55,14 @@
                        FAN_CLOSE |\
                        FAN_OPEN)
 
+/*
+ * All events which require a permission response from userspace
+ */
+#define FAN_ALL_PERM_EVENTS (FAN_OPEN_PERM |\
+                            FAN_ACCESS_PERM)
+
 #define FAN_ALL_OUTGOING_EVENTS        (FAN_ALL_EVENTS |\
+                                FAN_ALL_PERM_EVENTS |\
                                 FAN_Q_OVERFLOW)
 
 #define FANOTIFY_METADATA_VERSION      1
@@ -65,6 +75,10 @@ struct fanotify_event_metadata {
        __s64 pid;
 } __attribute__ ((packed));
 
+/* Legit userspace responses to a _PERM event */
+#define FAN_ALLOW      0x01
+#define FAN_DENY       0x02
+
 /* Helper functions to deal with fanotify_event_metadata buffers */
 #define FAN_EVENT_METADATA_LEN (sizeof(struct fanotify_event_metadata))
 
@@ -78,5 +92,9 @@ struct fanotify_event_metadata {
 
 #ifdef __KERNEL__
 
+struct fanotify_wait {
+       struct fsnotify_event *event;
+       __s32 fd;
+};
 #endif /* __KERNEL__ */
 #endif /* _LINUX_FANOTIFY_H */