[IPV4]: Add ip_local_out

[linux.git] / net / ipv4 / xfrm4_output.c

diff --git a/net/ipv4/xfrm4_output.c b/net/ipv4/xfrm4_output.c
index 038ca160fe2c4c67e3ba17fd39f3361fd31fa795..0ffc3d07848942b78eb41025a175876d81b4fbe5 100644 (file)
--- a/net/ipv4/xfrm4_output.c
+++ b/net/ipv4/xfrm4_output.c
@@ -8,12 +8,12 @@
  * 2 of the License, or (at your option) any later version.
  */
 
-#include <linux/compiler.h>
 #include <linux/if_ether.h>
 #include <linux/kernel.h>
+#include <linux/module.h>
 #include <linux/skbuff.h>
-#include <linux/spinlock.h>
 #include <linux/netfilter_ipv4.h>
+#include <net/dst.h>
 #include <net/ip.h>
 #include <net/xfrm.h>
 #include <net/icmp.h>
@@ -22,14 +22,11 @@ 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;
@@ -42,58 +39,47 @@ out:
        return ret;
 }
 
-static int xfrm4_output_one(struct sk_buff *skb)
+int xfrm4_extract_output(struct xfrm_state *x, struct sk_buff *skb)
 {
-       struct dst_entry *dst = skb->dst;
-       struct xfrm_state *x = dst->xfrm;
        int err;
 
-       if (skb->ip_summed == CHECKSUM_PARTIAL) {
-               err = skb_checksum_help(skb);
-               if (err)
-                       goto error_nolock;
-       }
+       err = xfrm4_tunnel_check_size(skb);
+       if (err)
+               return err;
 
-       if (x->props.mode == XFRM_MODE_TUNNEL) {
-               err = xfrm4_tunnel_check_size(skb);
-               if (err)
-                       goto error_nolock;
-       }
+       return xfrm4_extract_header(skb);
+}
 
-       do {
-               spin_lock_bh(&x->lock);
-               err = xfrm_state_check(x, skb);
-               if (err)
-                       goto error;
+int xfrm4_prepare_output(struct xfrm_state *x, struct sk_buff *skb)
+{
+       int err;
 
-               err = x->mode->output(x, skb);
-               if (err)
-                       goto error;
+       err = x->inner_mode->afinfo->extract_output(x, skb);
+       if (err)
+               return err;
 
-               err = x->type->output(x, skb);
-               if (err)
-                       goto error;
+       memset(IPCB(skb), 0, sizeof(*IPCB(skb)));
+       IPCB(skb)->flags |= IPSKB_XFRM_TUNNEL_SIZE;
 
-               x->curlft.bytes += skb->len;
-               x->curlft.packets++;
+       skb->protocol = htons(ETH_P_IP);
 
-               spin_unlock_bh(&x->lock);
+       return x->outer_mode->output2(x, skb);
+}
+EXPORT_SYMBOL(xfrm4_prepare_output);
 
-               if (!(skb->dst = dst_pop(dst))) {
-                       err = -EHOSTUNREACH;
-                       goto error_nolock;
-               }
-               dst = skb->dst;
-               x = dst->xfrm;
-       } while (x && (x->props.mode != XFRM_MODE_TUNNEL));
+static inline int xfrm4_output_one(struct sk_buff *skb)
+{
+       int err;
+
+       err = xfrm_output(skb);
+       if (err)
+               goto error_nolock;
 
        IPCB(skb)->flags |= IPSKB_XFRM_TRANSFORMED;
        err = 0;
 
 out_exit:
        return err;
-error:
-       spin_unlock_bh(&x->lock);
 error_nolock:
        kfree_skb(skb);
        goto out_exit;
@@ -106,15 +92,14 @@ static int xfrm4_output_finish2(struct sk_buff *skb)
        while (likely((err = xfrm4_output_one(skb)) == 0)) {
                nf_reset(skb);
 
-               err = nf_hook(PF_INET, NF_IP_LOCAL_OUT, &skb, NULL,
-                             skb->dst->dev, dst_output);
+               err = __ip_local_out(skb);
                if (unlikely(err != 1))
                        break;
 
                if (!skb->dst->xfrm)
                        return dst_output(skb);
 
-               err = nf_hook(PF_INET, NF_IP_POST_ROUTING, &skb, NULL,
+               err = nf_hook(PF_INET, NF_IP_POST_ROUTING, skb, NULL,
                              skb->dst->dev, xfrm4_output_finish2);
                if (unlikely(err != 1))
                        break;