netdev - [PATCH net-next-2.6 3/5] udpv6: Fix gso_size setting in ip6_ufo_append

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Date:	Thu, 09 Jul 2009 11:09:58 -0700
From:	Sridhar Samudrala <sri@...ibm.com>
To:	David Miller <davem@...emloft.net>,
	Herbert Xu <herbert@...dor.apana.org.au>,
	netdev <netdev@...r.kernel.org>
Subject: [PATCH net-next-2.6 3/5] udpv6: Fix gso_size setting in
 ip6_ufo_append_data

[PATCH net-next-2.6 3/5] udpv6: Fix gso_size setting in ip6_ufo_append_data

- fix gso_size setting for ipv6 fragment to be a multiple of 8 bytes.

Signed-off-by: Sridhar Samudrala <sri@...ibm.com>

---

 net/ipv6/ip6_output.c |    8 +++++---
 1 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/net/ipv6/ip6_output.c b/net/ipv6/ip6_output.c
index 7c76e3d..1c6f0fc 100644
--- a/net/ipv6/ip6_output.c
+++ b/net/ipv6/ip6_output.c
@@ -1087,9 +1087,11 @@ static inline int ip6_ufo_append_data(struct sock *sk,
 	if (!err) {
 		struct frag_hdr fhdr;
 
-		/* specify the length of each IP datagram fragment*/
-		skb_shinfo(skb)->gso_size = mtu - fragheaderlen -
-					    sizeof(struct frag_hdr);
+		/* Specify the length of each IPv6 datagram fragment.
+		 * It has to be a multiple of 8.
+		 */
+		skb_shinfo(skb)->gso_size = (mtu - fragheaderlen -
+					     sizeof(struct frag_hdr)) & ~7;
 		skb_shinfo(skb)->gso_type = SKB_GSO_UDP;
 		ipv6_select_ident(skb, &fhdr);
 		skb_shinfo(skb)->ip6_frag_id = fhdr.identification;


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