ipv4: Add ip_defrag() agent IP_DEFRAG_AF_PACKET.

Elide the ICMP on frag queue timeouts unconditionally for
this user.

Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv4/ip_fragment.c b/net/ipv4/ip_fragment.c
index 0ad6035..0e0ab98 100644
--- a/net/ipv4/ip_fragment.c
+++ b/net/ipv4/ip_fragment.c
@@ -261,8 +261,9 @@
 		 * Only an end host needs to send an ICMP
 		 * "Fragment Reassembly Timeout" message, per RFC792.
 		 */
-		if (qp->user == IP_DEFRAG_CONNTRACK_IN &&
-		    skb_rtable(head)->rt_type != RTN_LOCAL)
+		if (qp->user == IP_DEFRAG_AF_PACKET ||
+		    (qp->user == IP_DEFRAG_CONNTRACK_IN &&
+		     skb_rtable(head)->rt_type != RTN_LOCAL))
 			goto out_rcu_unlock;