headers: add skb_copy_datagram_msg()

This is used in some places.

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>

diff --git a/backport/backport-include/linux/skbuff.h b/backport/backport-include/linux/skbuff.h
index df0eb626c8ad3c58f26662ce9f7191178eaa1dc6..4cab6e10ca0ba3a9061963cd4de771e97b06cbb1 100644 (file)
--- a/backport/backport-include/linux/skbuff.h
+++ b/backport/backport-include/linux/skbuff.h
@@ -256,4 +256,13 @@ static inline struct page *dev_alloc_page(void)
 }
 #endif /* LINUX_VERSION_CODE < KERNEL_VERSION(3,19,0) */
 
+#if LINUX_VERSION_CODE < KERNEL_VERSION(3,19,0)
+#define skb_copy_datagram_msg LINUX_BACKPORT(skb_copy_datagram_msg)
+static inline int skb_copy_datagram_msg(const struct sk_buff *from, int offset,
+                                       struct msghdr *msg, int size)
+{
+       return skb_copy_datagram_iovec(from, offset, msg->msg_iov, size);
+}
+#endif /* LINUX_VERSION_CODE < KERNEL_VERSION(3,19,0) */
+
 #endif /* __BACKPORT_SKBUFF_H */