From: Herbert Xu <herbert@gondor.apana.org.au>
Date: Wed, 7 Mar 2007 04:29:58 +0000 (-0800)
Subject: [UDP6]: Restore sk_filter optimisation
X-Git-Tag: v2.6.22-rc1~1128^2~396
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=1ab6eb62b02e0949a392fb19bf31ba59ae1022b1;p=linux-2.6

[UDP6]: Restore sk_filter optimisation

This reverts the changeset

    [IPV6]: UDPv6 checksum.

    We always need to check UDPv6 checksum because it is mandatory.

The sk_filter optimisation has nothing to do whether we verify the
checksum.  It simply postpones it to the point when the user calls
recv or poll.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/net/ipv6/udp.c b/net/ipv6/udp.c
index f590db57a7..3413fc22ce 100644
--- a/net/ipv6/udp.c
+++ b/net/ipv6/udp.c
@@ -279,8 +279,10 @@ int udpv6_queue_rcv_skb(struct sock * sk, struct sk_buff *skb)
 		}
 	}
 
-	if (udp_lib_checksum_complete(skb))
-		goto drop;
+	if (sk->sk_filter) {
+		if (udp_lib_checksum_complete(skb))
+			goto drop;
+	}
 
 	if ((rc = sock_queue_rcv_skb(sk,skb)) < 0) {
 		/* Note that an ENOMEM error is charged twice */