net: skb->dst accessors

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

diff --git a/net/ipv6/exthdrs.c b/net/ipv6/exthdrs.c
index 1c7f400..4aae658 100644 (file)
--- a/net/ipv6/exthdrs.c
+++ b/net/ipv6/exthdrs.c
@@ -277,7 +277,7 @@ static int ipv6_destopt_rcv(struct sk_buff *skb)
        if (!pskb_may_pull(skb, skb_transport_offset(skb) + 8) ||
            !pskb_may_pull(skb, (skb_transport_offset(skb) +
                                 ((skb_transport_header(skb)[1] + 1) << 3)))) {
-               IP6_INC_STATS_BH(dev_net(skb->dst->dev), ip6_dst_idev(skb->dst),
+               IP6_INC_STATS_BH(dev_net(skb_dst(skb)->dev), ip6_dst_idev(skb_dst(skb)),
                                 IPSTATS_MIB_INHDRERRORS);
                kfree_skb(skb);
                return -1;
@@ -288,7 +288,7 @@ static int ipv6_destopt_rcv(struct sk_buff *skb)
        dstbuf = opt->dst1;
 #endif
 
-       dst = dst_clone(skb->dst);
+       dst = dst_clone(skb_dst(skb));
        if (ip6_parse_tlv(tlvprocdestopt_lst, skb)) {
                dst_release(dst);
                skb->transport_header += (skb_transport_header(skb)[1] + 1) << 3;
@@ -333,7 +333,7 @@ static int ipv6_rthdr_rcv(struct sk_buff *skb)
        if (!pskb_may_pull(skb, skb_transport_offset(skb) + 8) ||
            !pskb_may_pull(skb, (skb_transport_offset(skb) +
                                 ((skb_transport_header(skb)[1] + 1) << 3)))) {
-               IP6_INC_STATS_BH(net, ip6_dst_idev(skb->dst),
+               IP6_INC_STATS_BH(net, ip6_dst_idev(skb_dst(skb)),
                                 IPSTATS_MIB_INHDRERRORS);
                kfree_skb(skb);
                return -1;
@@ -343,7 +343,7 @@ static int ipv6_rthdr_rcv(struct sk_buff *skb)
 
        if (ipv6_addr_is_multicast(&ipv6_hdr(skb)->daddr) ||
            skb->pkt_type != PACKET_HOST) {
-               IP6_INC_STATS_BH(net, ip6_dst_idev(skb->dst),
+               IP6_INC_STATS_BH(net, ip6_dst_idev(skb_dst(skb)),
                                 IPSTATS_MIB_INADDRERRORS);
                kfree_skb(skb);
                return -1;
@@ -358,7 +358,7 @@ looped_back:
                         * processed by own
                         */
                        if (!addr) {
-                               IP6_INC_STATS_BH(net, ip6_dst_idev(skb->dst),
+                               IP6_INC_STATS_BH(net, ip6_dst_idev(skb_dst(skb)),
                                                 IPSTATS_MIB_INADDRERRORS);
                                kfree_skb(skb);
                                return -1;
@@ -384,7 +384,7 @@ looped_back:
                        goto unknown_rh;
                /* Silently discard invalid RTH type 2 */
                if (hdr->hdrlen != 2 || hdr->segments_left != 1) {
-                       IP6_INC_STATS_BH(net, ip6_dst_idev(skb->dst),
+                       IP6_INC_STATS_BH(net, ip6_dst_idev(skb_dst(skb)),
                                         IPSTATS_MIB_INHDRERRORS);
                        kfree_skb(skb);
                        return -1;
@@ -403,7 +403,7 @@ looped_back:
        n = hdr->hdrlen >> 1;
 
        if (hdr->segments_left > n) {
-               IP6_INC_STATS_BH(net, ip6_dst_idev(skb->dst),
+               IP6_INC_STATS_BH(net, ip6_dst_idev(skb_dst(skb)),
                                 IPSTATS_MIB_INHDRERRORS);
                icmpv6_param_prob(skb, ICMPV6_HDR_FIELD,
                                  ((&hdr->segments_left) -
@@ -417,7 +417,7 @@ looped_back:
        if (skb_cloned(skb)) {
                /* the copy is a forwarded packet */
                if (pskb_expand_head(skb, 0, 0, GFP_ATOMIC)) {
-                       IP6_INC_STATS_BH(net, ip6_dst_idev(skb->dst),
+                       IP6_INC_STATS_BH(net, ip6_dst_idev(skb_dst(skb)),
                                         IPSTATS_MIB_OUTDISCARDS);
                        kfree_skb(skb);
                        return -1;
@@ -440,13 +440,13 @@ looped_back:
                if (xfrm6_input_addr(skb, (xfrm_address_t *)addr,
                                     (xfrm_address_t *)&ipv6_hdr(skb)->saddr,
                                     IPPROTO_ROUTING) < 0) {
-                       IP6_INC_STATS_BH(net, ip6_dst_idev(skb->dst),
+                       IP6_INC_STATS_BH(net, ip6_dst_idev(skb_dst(skb)),
                                         IPSTATS_MIB_INADDRERRORS);
                        kfree_skb(skb);
                        return -1;
                }
-               if (!ipv6_chk_home_addr(dev_net(skb->dst->dev), addr)) {
-                       IP6_INC_STATS_BH(net, ip6_dst_idev(skb->dst),
+               if (!ipv6_chk_home_addr(dev_net(skb_dst(skb)->dev), addr)) {
+                       IP6_INC_STATS_BH(net, ip6_dst_idev(skb_dst(skb)),
                                         IPSTATS_MIB_INADDRERRORS);
                        kfree_skb(skb);
                        return -1;
@@ -458,7 +458,7 @@ looped_back:
        }
 
        if (ipv6_addr_is_multicast(addr)) {
-               IP6_INC_STATS_BH(net, ip6_dst_idev(skb->dst),
+               IP6_INC_STATS_BH(net, ip6_dst_idev(skb_dst(skb)),
                                 IPSTATS_MIB_INADDRERRORS);
                kfree_skb(skb);
                return -1;
@@ -468,17 +468,17 @@ looped_back:
        ipv6_addr_copy(addr, &ipv6_hdr(skb)->daddr);
        ipv6_addr_copy(&ipv6_hdr(skb)->daddr, &daddr);
 
-       dst_release(xchg(&skb->dst, NULL));
+       skb_dst_drop(skb);
        ip6_route_input(skb);
-       if (skb->dst->error) {
+       if (skb_dst(skb)->error) {
                skb_push(skb, skb->data - skb_network_header(skb));
                dst_input(skb);
                return -1;
        }
 
-       if (skb->dst->dev->flags&IFF_LOOPBACK) {
+       if (skb_dst(skb)->dev->flags&IFF_LOOPBACK) {
                if (ipv6_hdr(skb)->hop_limit <= 1) {
-                       IP6_INC_STATS_BH(net, ip6_dst_idev(skb->dst),
+                       IP6_INC_STATS_BH(net, ip6_dst_idev(skb_dst(skb)),
                                         IPSTATS_MIB_INHDRERRORS);
                        icmpv6_send(skb, ICMPV6_TIME_EXCEED, ICMPV6_EXC_HOPLIMIT,
                                    0, skb->dev);
@@ -494,7 +494,7 @@ looped_back:
        return -1;
 
 unknown_rh:
-       IP6_INC_STATS_BH(net, ip6_dst_idev(skb->dst), IPSTATS_MIB_INHDRERRORS);
+       IP6_INC_STATS_BH(net, ip6_dst_idev(skb_dst(skb)), IPSTATS_MIB_INHDRERRORS);
        icmpv6_param_prob(skb, ICMPV6_HDR_FIELD,
                          (&hdr->type) - skb_network_header(skb));
        return -1;
@@ -552,11 +552,11 @@ void ipv6_exthdrs_exit(void)
  **********************************/
 
 /*
- * Note: we cannot rely on skb->dst before we assign it in ip6_route_input().
+ * Note: we cannot rely on skb_dst(skb) before we assign it in ip6_route_input().
  */
 static inline struct inet6_dev *ipv6_skb_idev(struct sk_buff *skb)
 {
-       return skb->dst ? ip6_dst_idev(skb->dst) : __in6_dev_get(skb->dev);
+       return skb_dst(skb) ? ip6_dst_idev(skb_dst(skb)) : __in6_dev_get(skb->dev);
 }
 
 /* Router Alert as of RFC 2711 */
@@ -581,7 +581,7 @@ static int ipv6_hop_jumbo(struct sk_buff *skb, int optoff)
 {
        const unsigned char *nh = skb_network_header(skb);
        u32 pkt_len;
-       struct net *net = dev_net(skb->dst->dev);
+       struct net *net = dev_net(skb_dst(skb)->dev);
 
        if (nh[optoff + 1] != 4 || (optoff & 3) != 2) {
                LIMIT_NETDEBUG(KERN_DEBUG "ipv6_hop_jumbo: wrong jumbo opt length/alignment %d\n",