block: add secure discard

[karo-tx-linux.git] / include / linux / fanotify.h

diff --git a/include/linux/fanotify.h b/include/linux/fanotify.h
index 95aeea2a3ca62724ade48157f8c519a3d0f5c06c..f0949a57ca9d72cc7cb47df5717ab6fef250427b 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 */
 
@@ -29,11 +32,18 @@
 #define FAN_MARK_REMOVE                0x00000002
 #define FAN_MARK_DONT_FOLLOW   0x00000004
 #define FAN_MARK_ONLYDIR       0x00000008
+#define FAN_MARK_MOUNT         0x00000010
+#define FAN_MARK_IGNORED_MASK  0x00000020
+#define FAN_MARK_IGNORED_SURV_MODIFY   0x00000040
+#define FAN_MARK_FLUSH         0x00000080
 
 #define FAN_ALL_MARK_FLAGS     (FAN_MARK_ADD |\
                                 FAN_MARK_REMOVE |\
                                 FAN_MARK_DONT_FOLLOW |\
-                                FAN_MARK_ONLYDIR)
+                                FAN_MARK_ONLYDIR |\
+                                FAN_MARK_MOUNT |\
+                                FAN_MARK_IGNORED_MASK |\
+                                FAN_MARK_IGNORED_SURV_MODIFY)
 
 /*
  * All of the events - we build the list by hand so that we can add flags in
@@ -46,12 +56,50 @@
                        FAN_OPEN)
 
 /*
- * All legal FAN bits userspace can request (although possibly not all
- * at the same time.
+ * All events which require a permission response from userspace
  */
-#define FAN_ALL_INCOMING_EVENTS        (FAN_ALL_EVENTS |\
-                                FAN_EVENT_ON_CHILD)
+#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
+
+struct fanotify_event_metadata {
+       __u32 event_len;
+       __u32 vers;
+       __s32 fd;
+       __u64 mask;
+       __s64 pid;
+} __attribute__ ((packed));
+
+struct fanotify_response {
+       __s32 fd;
+       __u32 response;
+} __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))
+
+#define FAN_EVENT_NEXT(meta, len) ((len) -= (meta)->event_len, \
+                                  (struct fanotify_event_metadata*)(((char *)(meta)) + \
+                                  (meta)->event_len))
+
+#define FAN_EVENT_OK(meta, len)        ((long)(len) >= (long)FAN_EVENT_METADATA_LEN && \
+                               (long)(meta)->event_len >= (long)FAN_EVENT_METADATA_LEN && \
+                               (long)(meta)->event_len <= (long)(len))
+
 #ifdef __KERNEL__
 
+struct fanotify_wait {
+       struct fsnotify_event *event;
+       __s32 fd;
+};
 #endif /* __KERNEL__ */
 #endif /* _LINUX_FANOTIFY_H */