Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6

[linux-2.6-omap-h63xx.git] / net / ipv4 / xfrm4_output.c

diff --git a/net/ipv4/xfrm4_output.c b/net/ipv4/xfrm4_output.c
index ac9d91d4bb0563c2e471bfa5483c901ac38bac64..44ef208a75cb175bfbff21cae090212a6d996b07 100644 (file)
--- a/net/ipv4/xfrm4_output.c
+++ b/net/ipv4/xfrm4_output.c
@@ -1,7 +1,7 @@
 /*
  * xfrm4_output.c - Common IPsec encapsulation code for IPv4.
  * Copyright (c) 2004 Herbert Xu <herbert@gondor.apana.org.au>
- * 
+ *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License
  * as published by the Free Software Foundation; either version
@@ -9,6 +9,8 @@
  */
 
 #include <linux/compiler.h>
+#include <linux/if_ether.h>
+#include <linux/kernel.h>
 #include <linux/skbuff.h>
 #include <linux/spinlock.h>
 #include <linux/netfilter_ipv4.h>
@@ -20,14 +22,13 @@ static int xfrm4_tunnel_check_size(struct sk_buff *skb)
 {
        int mtu, ret = 0;
        struct dst_entry *dst;
-       struct iphdr *iph = skb->nh.iph;
 
        if (IPCB(skb)->flags & IPSKB_XFRM_TUNNEL_SIZE)
                goto out;
 
        IPCB(skb)->flags |= IPSKB_XFRM_TUNNEL_SIZE;
-       
-       if (!(iph->frag_off & htons(IP_DF)) || skb->local_df)
+
+       if (!(ip_hdr(skb)->frag_off & htons(IP_DF)) || skb->local_df)
                goto out;
 
        dst = skb->dst;
@@ -45,14 +46,14 @@ static int xfrm4_output_one(struct sk_buff *skb)
        struct dst_entry *dst = skb->dst;
        struct xfrm_state *x = dst->xfrm;
        int err;
-       
-       if (skb->ip_summed == CHECKSUM_HW) {
-               err = skb_checksum_help(skb, 0);
+
+       if (skb->ip_summed == CHECKSUM_PARTIAL) {
+               err = skb_checksum_help(skb);
                if (err)
                        goto error_nolock;
        }
 
-       if (x->props.mode) {
+       if (x->props.mode == XFRM_MODE_TUNNEL) {
                err = xfrm4_tunnel_check_size(skb);
                if (err)
                        goto error_nolock;
@@ -64,7 +65,7 @@ static int xfrm4_output_one(struct sk_buff *skb)
                if (err)
                        goto error;
 
-               err = x->mode->output(skb);
+               err = x->mode->output(x, skb);
                if (err)
                        goto error;
 
@@ -76,14 +77,14 @@ static int xfrm4_output_one(struct sk_buff *skb)
                x->curlft.packets++;
 
                spin_unlock_bh(&x->lock);
-       
+
                if (!(skb->dst = dst_pop(dst))) {
                        err = -EHOSTUNREACH;
                        goto error_nolock;
                }
                dst = skb->dst;
                x = dst->xfrm;
-       } while (x && !x->props.mode);
+       } while (x && (x->props.mode != XFRM_MODE_TUNNEL));
 
        IPCB(skb)->flags |= IPSKB_XFRM_TRANSFORMED;
        err = 0;
@@ -97,16 +98,10 @@ error_nolock:
        goto out_exit;
 }
 
-static int xfrm4_output_finish(struct sk_buff *skb)
+static int xfrm4_output_finish2(struct sk_buff *skb)
 {
        int err;
 
-#ifdef CONFIG_NETFILTER
-       if (!skb->dst->xfrm) {
-               IPCB(skb)->flags |= IPSKB_REROUTED;
-               return dst_output(skb);
-       }
-#endif
        while (likely((err = xfrm4_output_one(skb)) == 0)) {
                nf_reset(skb);
 
@@ -119,7 +114,7 @@ static int xfrm4_output_finish(struct sk_buff *skb)
                        return dst_output(skb);
 
                err = nf_hook(PF_INET, NF_IP_POST_ROUTING, &skb, NULL,
-                             skb->dst->dev, xfrm4_output_finish);
+                             skb->dst->dev, xfrm4_output_finish2);
                if (unlikely(err != 1))
                        break;
        }
@@ -127,6 +122,48 @@ static int xfrm4_output_finish(struct sk_buff *skb)
        return err;
 }
 
+static int xfrm4_output_finish(struct sk_buff *skb)
+{
+       struct sk_buff *segs;
+
+#ifdef CONFIG_NETFILTER
+       if (!skb->dst->xfrm) {
+               IPCB(skb)->flags |= IPSKB_REROUTED;
+               return dst_output(skb);
+       }
+#endif
+
+       if (!skb_is_gso(skb))
+               return xfrm4_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 = xfrm4_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 xfrm4_output(struct sk_buff *skb)
 {
        return NF_HOOK_COND(PF_INET, NF_IP_POST_ROUTING, skb, NULL, skb->dst->dev,