Fedora kernel-2.6.17-1.2142_FC4 patched with stable patch-2.6.17.4-vs2.0.2-rc26.diff

[linux-2.6.git] / net / ipv6 / xfrm6_output.c

diff --git a/net/ipv6/xfrm6_output.c b/net/ipv6/xfrm6_output.c
index 40612ec..8024217 100644 (file)
--- 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 +150,33 @@ error_nolock:
        kfree_skb(skb);
        goto out_exit;
 }
+
+static int xfrm6_output_finish(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_finish);
+               if (unlikely(err != 1))
+                       break;
+       }
+
+       return err;
+}
+
+int xfrm6_output(struct sk_buff *skb)
+{
+       return NF_HOOK(PF_INET6, NF_IP6_POST_ROUTING, skb, NULL, skb->dst->dev,
+                      xfrm6_output_finish);
+}