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authorHerbert Xu <herbert@gondor.apana.org.au>2006-06-22 14:08:03 +0400
committerDavid S. Miller <davem@sunset.davemloft.net>2006-06-23 13:07:38 +0400
commit09b8f7a93efd4b2c4ef391e2fbf076f28c6d36d6 (patch)
tree7168ac18ce0b765e67f0536e13b8628b1c12ad38 /net/ipv6/xfrm6_output.c
parent37c3185a02d4b85fbe134bf5204535405dd2c957 (diff)
downloadlinux-09b8f7a93efd4b2c4ef391e2fbf076f28c6d36d6.tar.xz
[IPSEC]: Handle GSO packets
This patch segments GSO packets received by the IPsec stack. This can happen when a NIC driver injects GSO packets into the stack which are then forwarded to another host. The primary application of this is going to be Xen where its backend driver may inject GSO packets into dom0. Of course this also can be used by other virtualisation schemes such as VMWare or UML since the tap device could be modified to inject GSO packets received through splice. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6/xfrm6_output.c')
-rw-r--r--net/ipv6/xfrm6_output.c39
1 files changed, 37 insertions, 2 deletions
diff --git a/net/ipv6/xfrm6_output.c b/net/ipv6/xfrm6_output.c
index 16e84254a252..48fccb1eca08 100644
--- a/net/ipv6/xfrm6_output.c
+++ b/net/ipv6/xfrm6_output.c
@@ -94,7 +94,7 @@ error_nolock:
goto out_exit;
}
-static int xfrm6_output_finish(struct sk_buff *skb)
+static int xfrm6_output_finish2(struct sk_buff *skb)
{
int err;
@@ -110,7 +110,7 @@ static int xfrm6_output_finish(struct sk_buff *skb)
return dst_output(skb);
err = nf_hook(PF_INET6, NF_IP6_POST_ROUTING, &skb, NULL,
- skb->dst->dev, xfrm6_output_finish);
+ skb->dst->dev, xfrm6_output_finish2);
if (unlikely(err != 1))
break;
}
@@ -118,6 +118,41 @@ static int xfrm6_output_finish(struct sk_buff *skb)
return err;
}
+static int xfrm6_output_finish(struct sk_buff *skb)
+{
+ struct sk_buff *segs;
+
+ if (!skb_shinfo(skb)->gso_size)
+ return xfrm6_output_finish2(skb);
+
+ skb->protocol = htons(ETH_P_IP);
+ segs = skb_gso_segment(skb, 0);
+ kfree_skb(skb);
+ if (unlikely(IS_ERR(segs)))
+ return PTR_ERR(segs);
+
+ do {
+ struct sk_buff *nskb = segs->next;
+ int err;
+
+ segs->next = NULL;
+ err = xfrm6_output_finish2(segs);
+
+ if (unlikely(err)) {
+ while ((segs = nskb)) {
+ nskb = segs->next;
+ segs->next = NULL;
+ kfree_skb(segs);
+ }
+ return err;
+ }
+
+ segs = nskb;
+ } while (segs);
+
+ return 0;
+}
+
int xfrm6_output(struct sk_buff *skb)
{
return NF_HOOK(PF_INET6, NF_IP6_POST_ROUTING, skb, NULL, skb->dst->dev,