1 files changed, 14 insertions, 112 deletions

diff --git a/net/ipv4/xfrm4_input.c b/net/ipv4/xfrm4_input.c
index c0323d05ab69..e374903dacdf 100644
--- a/net/ipv4/xfrm4_input.c
+++ b/net/ipv4/xfrm4_input.c
@@ -41,124 +41,26 @@ drop:
 int xfrm4_rcv_encap(struct sk_buff *skb, int nexthdr, __be32 spi,
                     int encap_type)
 {
-        int err;
-        __be32 seq;
-        struct xfrm_state *xfrm_vec[XFRM_MAX_DEPTH];
-        struct xfrm_state *x;
-        int xfrm_nr = 0;
-        int decaps = 0;
-        unsigned int nhoff = offsetof(struct iphdr, protocol);
-
-        seq = 0;
-        if (!spi && (err = xfrm_parse_spi(skb, nexthdr, &spi, &seq)) != 0)
-                goto drop;
-
-        do {
-                const struct iphdr *iph = ip_hdr(skb);
-
-                if (xfrm_nr == XFRM_MAX_DEPTH)
-                        goto drop;
-
-                x = xfrm_state_lookup((xfrm_address_t *)&iph->daddr, spi,
-                                      nexthdr, AF_INET);
-                if (x == NULL)
-                        goto drop;
-
-                spin_lock(&x->lock);
-                if (unlikely(x->km.state != XFRM_STATE_VALID))
-                        goto drop_unlock;
-
-                if ((x->encap ? x->encap->encap_type : 0) != encap_type)
-                        goto drop_unlock;
-
-                if (x->props.replay_window && xfrm_replay_check(x, seq))
-                        goto drop_unlock;
-
-                if (xfrm_state_check_expire(x))
-                        goto drop_unlock;
-
-                nexthdr = x->type->input(x, skb);
-                if (nexthdr <= 0)
-                        goto drop_unlock;
-
-                skb_network_header(skb)[nhoff] = nexthdr;
-
-                /* only the first xfrm gets the encap type */
-                encap_type = 0;
-
-                if (x->props.replay_window)
-                        xfrm_replay_advance(x, seq);
-
-                x->curlft.bytes += skb->len;
-                x->curlft.packets++;
-
-                spin_unlock(&x->lock);
-
-                xfrm_vec[xfrm_nr++] = x;
-
-                if (x->inner_mode->input(x, skb))
-                        goto drop;
-
-                if (x->outer_mode->flags & XFRM_MODE_FLAG_TUNNEL) {
-                        decaps = 1;
-                        break;
-                }
-
-                err = xfrm_parse_spi(skb, nexthdr, &spi, &seq);
-                if (err < 0)
-                        goto drop;
-        } while (!err);
-
-        /* Allocate new secpath or COW existing one. */
-
-        if (!skb->sp || atomic_read(&skb->sp->refcnt) != 1) {
-                struct sec_path *sp;
-                sp = secpath_dup(skb->sp);
-                if (!sp)
-                        goto drop;
-                if (skb->sp)
-                        secpath_put(skb->sp);
-                skb->sp = sp;
-        }
-        if (xfrm_nr + skb->sp->len > XFRM_MAX_DEPTH)
-                goto drop;
-
-        memcpy(skb->sp->xvec + skb->sp->len, xfrm_vec,
-               xfrm_nr * sizeof(xfrm_vec[0]));
-        skb->sp->len += xfrm_nr;
-
-        nf_reset(skb);
+        XFRM_SPI_SKB_CB(skb)->nhoff = offsetof(struct iphdr, protocol);
+        XFRM_SPI_SKB_CB(skb)->daddroff = offsetof(struct iphdr, daddr);
+        return xfrm_input(skb, nexthdr, spi, encap_type);
+}
+EXPORT_SYMBOL(xfrm4_rcv_encap);
 
-        if (decaps) {
-                dst_release(skb->dst);
-                skb->dst = NULL;
-                netif_rx(skb);
-                return 0;
-        } else {
+int xfrm4_transport_finish(struct sk_buff *skb, int async)
+{
 #ifdef CONFIG_NETFILTER
-                __skb_push(skb, skb->data - skb_network_header(skb));
-                ip_hdr(skb)->tot_len = htons(skb->len);
-                ip_send_check(ip_hdr(skb));
+        __skb_push(skb, skb->data - skb_network_header(skb));
+        ip_hdr(skb)->tot_len = htons(skb->len);
+        ip_send_check(ip_hdr(skb));
 
-                NF_HOOK(PF_INET, NF_IP_PRE_ROUTING, skb, skb->dev, NULL,
-                        xfrm4_rcv_encap_finish);
-                return 0;
+        NF_HOOK(PF_INET, NF_IP_PRE_ROUTING, skb, skb->dev, NULL,
+                xfrm4_rcv_encap_finish);
+        return 0;
 #else
-                return -ip_hdr(skb)->protocol;
+        return -ip_hdr(skb)->protocol;
 #endif
-        }
-
-drop_unlock:
-        spin_unlock(&x->lock);
-        xfrm_state_put(x);
-drop:
-        while (--xfrm_nr >= 0)
-                xfrm_state_put(xfrm_vec[xfrm_nr]);
-
-        kfree_skb(skb);
-        return 0;
 }
-EXPORT_SYMBOL(xfrm4_rcv_encap);
 
 /* If it's a keepalive packet, then just eat it.
  * If it's an encapsulated packet, then pass it to the