net: remove INIT_RCU_HEAD() usage

[safe/jmp/linux-2.6] / net / ipv6 / xfrm6_mode_beet.c

diff --git a/net/ipv6/xfrm6_mode_beet.c b/net/ipv6/xfrm6_mode_beet.c
index 13bb1e8..bbd48b1 100644 (file)
--- a/net/ipv6/xfrm6_mode_beet.c
+++ b/net/ipv6/xfrm6_mode_beet.c
@@ -19,31 +19,63 @@
 #include <net/ipv6.h>
 #include <net/xfrm.h>
 
+static void xfrm6_beet_make_header(struct sk_buff *skb)
+{
+       struct ipv6hdr *iph = ipv6_hdr(skb);
+
+       iph->version = 6;
+
+       memcpy(iph->flow_lbl, XFRM_MODE_SKB_CB(skb)->flow_lbl,
+              sizeof(iph->flow_lbl));
+       iph->nexthdr = XFRM_MODE_SKB_CB(skb)->protocol;
+
+       ipv6_change_dsfield(iph, 0, XFRM_MODE_SKB_CB(skb)->tos);
+       iph->hop_limit = XFRM_MODE_SKB_CB(skb)->ttl;
+}
+
 /* Add encapsulation header.
  *
  * The top IP header will be constructed per draft-nikander-esp-beet-mode-06.txt.
  */
 static int xfrm6_beet_output(struct xfrm_state *x, struct sk_buff *skb)
 {
-       struct ipv6hdr *iph, *top_iph;
-       u8 *prevhdr;
-       int hdr_len;
+       struct ipv6hdr *top_iph;
+       struct ip_beet_phdr *ph;
+       struct iphdr *iphv4;
+       int optlen, hdr_len;
+
+       iphv4 = ip_hdr(skb);
+       hdr_len = 0;
+       optlen = XFRM_MODE_SKB_CB(skb)->optlen;
+       if (unlikely(optlen))
+               hdr_len += IPV4_BEET_PHMAXLEN - (optlen & 4);
+
+       skb_set_network_header(skb, -x->props.header_len - hdr_len);
+       if (x->sel.family != AF_INET6)
+               skb->network_header += IPV4_BEET_PHMAXLEN;
+       skb->mac_header = skb->network_header +
+                         offsetof(struct ipv6hdr, nexthdr);
+       skb->transport_header = skb->network_header + sizeof(*top_iph);
+       ph = (struct ip_beet_phdr *)__skb_pull(skb, XFRM_MODE_SKB_CB(skb)->ihl-hdr_len);
+
+       xfrm6_beet_make_header(skb);
 
-       iph = ipv6_hdr(skb);
+       top_iph = ipv6_hdr(skb);
+       if (unlikely(optlen)) {
 
-       hdr_len = ip6_find_1stfragopt(skb, &prevhdr);
+               BUG_ON(optlen < 0);
 
-       skb_set_mac_header(skb, (prevhdr - x->props.header_len) - skb->data);
-       skb_set_network_header(skb, -x->props.header_len);
-       skb->transport_header = skb->network_header + hdr_len;
-       __skb_pull(skb, hdr_len);
+               ph->padlen = 4 - (optlen & 4);
+               ph->hdrlen = optlen / 8;
+               ph->nexthdr = top_iph->nexthdr;
+               if (ph->padlen)
+                       memset(ph + 1, IPOPT_NOP, ph->padlen);
 
-       top_iph = ipv6_hdr(skb);
-       memmove(top_iph, iph, hdr_len);
+               top_iph->nexthdr = IPPROTO_BEETPH;
+       }
 
        ipv6_addr_copy(&top_iph->saddr, (struct in6_addr *)&x->props.saddr);
        ipv6_addr_copy(&top_iph->daddr, (struct in6_addr *)&x->id.daddr);
-
        return 0;
 }
 
@@ -52,19 +84,21 @@ static int xfrm6_beet_input(struct xfrm_state *x, struct sk_buff *skb)
        struct ipv6hdr *ip6h;
        const unsigned char *old_mac;
        int size = sizeof(struct ipv6hdr);
-       int err = -EINVAL;
+       int err;
 
-       if (!pskb_may_pull(skb, sizeof(struct ipv6hdr)))
+       err = skb_cow_head(skb, size + skb->mac_len);
+       if (err)
                goto out;
 
-       skb_push(skb, size);
-       memmove(skb->data, skb_network_header(skb), size);
+       __skb_push(skb, size);
        skb_reset_network_header(skb);
 
        old_mac = skb_mac_header(skb);
        skb_set_mac_header(skb, -skb->mac_len);
        memmove(skb_mac_header(skb), old_mac, skb->mac_len);
 
+       xfrm6_beet_make_header(skb);
+
        ip6h = ipv6_hdr(skb);
        ip6h->payload_len = htons(skb->len - size);
        ipv6_addr_copy(&ip6h->daddr, (struct in6_addr *) &x->sel.daddr.a6);
@@ -75,10 +109,13 @@ out:
 }
 
 static struct xfrm_mode xfrm6_beet_mode = {
-       .input = xfrm6_beet_input,
-       .output = xfrm6_beet_output,
+       .input2 = xfrm6_beet_input,
+       .input = xfrm_prepare_input,
+       .output2 = xfrm6_beet_output,
+       .output = xfrm6_prepare_output,
        .owner = THIS_MODULE,
        .encap = XFRM_MODE_BEET,
+       .flags = XFRM_MODE_FLAG_TUNNEL,
 };
 
 static int __init xfrm6_beet_init(void)