1 files changed, 16 insertions, 0 deletions

diff --git a/include/linux/can/dev.h b/include/linux/can/dev.h
index 3db7767d2a17..c8c660a79f90 100644
--- a/include/linux/can/dev.h
+++ b/include/linux/can/dev.h
@@ -38,6 +38,7 @@ struct can_priv {
 
         enum can_state state;
         u32 ctrlmode;
+        u32 ctrlmode_supported;
 
         int restart_ms;
         struct timer_list restart_timer;
@@ -60,6 +61,21 @@ struct can_priv {
  */
 #define get_can_dlc(i)  (min_t(__u8, (i), 8))
 
+/* Drop a given socketbuffer if it does not contain a valid CAN frame. */
+static inline int can_dropped_invalid_skb(struct net_device *dev,
+                                          struct sk_buff *skb)
+{
+        const struct can_frame *cf = (struct can_frame *)skb->data;
+
+        if (unlikely(skb->len != sizeof(*cf) || cf->can_dlc > 8)) {
+                kfree_skb(skb);
+                dev->stats.tx_dropped++;
+                return 1;
+        }
+
+        return 0;
+}
+
 struct net_device *alloc_candev(int sizeof_priv, unsigned int echo_skb_max);
 void free_candev(struct net_device *dev);