af_packet: allow packets defragmentation not only for hash fanout type

Packets defragmentation was introduced for PACKET_FANOUT_HASH only,
see 7736d33f4262 ("packet: Add pre-defragmentation support for ipv4
fanouts")

It may be useful to have defragmentation enabled regardless of
fanout type. Without that, the AF_PACKET user may have to:
1. Collect fragments from different rings
2. Defragment by itself

Signed-off-by: Alexander Drozdov <al.drozdov@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/packet/af_packet.c b/net/packet/af_packet.c
index 9c28cec..99fc628 100644 (file)
--- a/net/packet/af_packet.c
+++ b/net/packet/af_packet.c
@@ -1349,14 +1349,14 @@ static int packet_rcv_fanout(struct sk_buff *skb, struct net_device *dev,
                return 0;
        }
 
+       if (fanout_has_flag(f, PACKET_FANOUT_FLAG_DEFRAG)) {
+               skb = ip_check_defrag(skb, IP_DEFRAG_AF_PACKET);
+               if (!skb)
+                       return 0;
+       }
        switch (f->type) {
        case PACKET_FANOUT_HASH:
        default:
-               if (fanout_has_flag(f, PACKET_FANOUT_FLAG_DEFRAG)) {
-                       skb = ip_check_defrag(skb, IP_DEFRAG_AF_PACKET);
-                       if (!skb)
-                               return 0;
-               }
                idx = fanout_demux_hash(f, skb, num);
                break;
        case PACKET_FANOUT_LB: