X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=net%2Fipv6%2Fxfrm6_output.c;h=e9ea33892e44db1c41d6cf83376b3905e612be3a;hb=9464c7cf61b9433057924c36e6e02f303a00e768;hp=40612ec543059f8ff09e4cf0035adf11ece5bc99;hpb=1a69f36a78895dad9a6b97ffa2d6d2b7c3975b5d;p=linux-2.6.git

diff --git a/net/ipv6/xfrm6_output.c b/net/ipv6/xfrm6_output.c
index 40612ec54..e9ea33892 100644
--- a/net/ipv6/xfrm6_output.c
+++ b/net/ipv6/xfrm6_output.c
@@ -9,9 +9,11 @@
  * 2 of the License, or (at your option) any later version.
  */
 
+#include <linux/compiler.h>
 #include <linux/skbuff.h>
 #include <linux/spinlock.h>
 #include <linux/icmpv6.h>
+#include <linux/netfilter_ipv6.h>
 #include <net/dsfield.h>
 #include <net/inet_ecn.h>
 #include <net/ipv6.h>
@@ -69,7 +71,7 @@ static void xfrm6_encap(struct sk_buff *skb)
 		dsfield &= ~INET_ECN_MASK;
 	ipv6_change_dsfield(top_iph, 0, dsfield);
 	top_iph->nexthdr = IPPROTO_IPV6; 
-	top_iph->hop_limit = dst_path_metric(dst, RTAX_HOPLIMIT);
+	top_iph->hop_limit = dst_metric(dst->child, RTAX_HOPLIMIT);
 	ipv6_addr_copy(&top_iph->saddr, (struct in6_addr *)&x->props.saddr);
 	ipv6_addr_copy(&top_iph->daddr, (struct in6_addr *)&x->id.daddr);
 }
@@ -79,11 +81,12 @@ static int xfrm6_tunnel_check_size(struct sk_buff *skb)
 	int mtu, ret = 0;
 	struct dst_entry *dst = skb->dst;
 
-	mtu = dst_pmtu(dst) - sizeof(struct ipv6hdr);
+	mtu = dst_mtu(dst);
 	if (mtu < IPV6_MIN_MTU)
 		mtu = IPV6_MIN_MTU;
 
 	if (skb->len > mtu) {
+		skb->dev = dst->dev;
 		icmpv6_send(skb, ICMPV6_PKT_TOOBIG, 0, mtu, skb->dev);
 		ret = -EMSGSIZE;
 	}
@@ -91,49 +94,53 @@ static int xfrm6_tunnel_check_size(struct sk_buff *skb)
 	return ret;
 }
 
-int xfrm6_output(struct sk_buff **pskb)
+static int xfrm6_output_one(struct sk_buff *skb)
 {
-	struct sk_buff *skb = *pskb;
 	struct dst_entry *dst = skb->dst;
 	struct xfrm_state *x = dst->xfrm;
 	int err;
 	
 	if (skb->ip_summed == CHECKSUM_HW) {
-		err = skb_checksum_help(pskb, 0);
-		skb = *pskb;
+		err = skb_checksum_help(skb, 0);
 		if (err)
 			goto error_nolock;
 	}
 
-	spin_lock_bh(&x->lock);
-	err = xfrm_state_check(x, skb);
-	if (err)
-		goto error;
-
 	if (x->props.mode) {
 		err = xfrm6_tunnel_check_size(skb);
 		if (err)
-			goto error;
+			goto error_nolock;
 	}
 
-	xfrm6_encap(skb);
+	do {
+		spin_lock_bh(&x->lock);
+		err = xfrm_state_check(x, skb);
+		if (err)
+			goto error;
 
-	err = x->type->output(skb);
-	if (err)
-		goto error;
+		xfrm6_encap(skb);
 
-	x->curlft.bytes += skb->len;
-	x->curlft.packets++;
+		err = x->type->output(x, skb);
+		if (err)
+			goto error;
 
-	spin_unlock_bh(&x->lock);
+		x->curlft.bytes += skb->len;
+		x->curlft.packets++;
 
-	skb->nh.raw = skb->data;
-	
-	if (!(skb->dst = dst_pop(dst))) {
-		err = -EHOSTUNREACH;
-		goto error_nolock;
-	}
-	err = NET_XMIT_BYPASS;
+		spin_unlock_bh(&x->lock);
+
+		skb->nh.raw = skb->data;
+		
+		if (!(skb->dst = dst_pop(dst))) {
+			err = -EHOSTUNREACH;
+			goto error_nolock;
+		}
+		dst = skb->dst;
+		x = dst->xfrm;
+	} while (x && !x->props.mode);
+
+	IP6CB(skb)->flags |= IP6SKB_XFRM_TRANSFORMED;
+	err = 0;
 
 out_exit:
 	return err;
@@ -143,3 +150,68 @@ error_nolock:
 	kfree_skb(skb);
 	goto out_exit;
 }
+
+static int xfrm6_output_finish2(struct sk_buff *skb)
+{
+	int err;
+
+	while (likely((err = xfrm6_output_one(skb)) == 0)) {
+		nf_reset(skb);
+	
+		err = nf_hook(PF_INET6, NF_IP6_LOCAL_OUT, &skb, NULL,
+			      skb->dst->dev, dst_output);
+		if (unlikely(err != 1))
+			break;
+
+		if (!skb->dst->xfrm)
+			return dst_output(skb);
+
+		err = nf_hook(PF_INET6, NF_IP6_POST_ROUTING, &skb, NULL,
+			      skb->dst->dev, xfrm6_output_finish2);
+		if (unlikely(err != 1))
+			break;
+	}
+
+	return err;
+}
+
+static int xfrm6_output_finish(struct sk_buff *skb)
+{
+	struct sk_buff *segs;
+
+	if (!skb_is_gso(skb))
+		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,
+		       xfrm6_output_finish);
+}