1 files changed, 33 insertions, 34 deletions

diff --git a/net/ipv6/ip6_output.c b/net/ipv6/ip6_output.c
index 735a2bf4b5f1..7c76e3d18215 100644
--- a/net/ipv6/ip6_output.c
+++ b/net/ipv6/ip6_output.c
@@ -78,7 +78,7 @@ int __ip6_local_out(struct sk_buff *skb)
                 len = 0;
         ipv6_hdr(skb)->payload_len = htons(len);
 
-        return nf_hook(PF_INET6, NF_INET_LOCAL_OUT, skb, NULL, skb->dst->dev,
+        return nf_hook(PF_INET6, NF_INET_LOCAL_OUT, skb, NULL, skb_dst(skb)->dev,
                        dst_output);
 }
 
@@ -96,7 +96,7 @@ EXPORT_SYMBOL_GPL(ip6_local_out);
 
 static int ip6_output_finish(struct sk_buff *skb)
 {
-        struct dst_entry *dst = skb->dst;
+        struct dst_entry *dst = skb_dst(skb);
 
         if (dst->hh)
                 return neigh_hh_output(dst->hh, skb);
@@ -117,7 +117,7 @@ static int ip6_dev_loopback_xmit(struct sk_buff *newskb)
         __skb_pull(newskb, skb_network_offset(newskb));
         newskb->pkt_type = PACKET_LOOPBACK;
         newskb->ip_summed = CHECKSUM_UNNECESSARY;
-        WARN_ON(!newskb->dst);
+        WARN_ON(!skb_dst(newskb));
 
         netif_rx(newskb);
         return 0;
@@ -126,7 +126,7 @@ static int ip6_dev_loopback_xmit(struct sk_buff *newskb)
 
 static int ip6_output2(struct sk_buff *skb)
 {
-        struct dst_entry *dst = skb->dst;
+        struct dst_entry *dst = skb_dst(skb);
         struct net_device *dev = dst->dev;
 
         skb->protocol = htons(ETH_P_IPV6);
@@ -134,7 +134,7 @@ static int ip6_output2(struct sk_buff *skb)
 
         if (ipv6_addr_is_multicast(&ipv6_hdr(skb)->daddr)) {
                 struct ipv6_pinfo* np = skb->sk ? inet6_sk(skb->sk) : NULL;
-                struct inet6_dev *idev = ip6_dst_idev(skb->dst);
+                struct inet6_dev *idev = ip6_dst_idev(skb_dst(skb));
 
                 if (!(dev->flags & IFF_LOOPBACK) && (!np || np->mc_loop) &&
                     ((mroute6_socket(dev_net(dev)) &&
@@ -172,21 +172,21 @@ static inline int ip6_skb_dst_mtu(struct sk_buff *skb)
         struct ipv6_pinfo *np = skb->sk ? inet6_sk(skb->sk) : NULL;
 
         return (np && np->pmtudisc == IPV6_PMTUDISC_PROBE) ?
-               skb->dst->dev->mtu : dst_mtu(skb->dst);
+               skb_dst(skb)->dev->mtu : dst_mtu(skb_dst(skb));
 }
 
 int ip6_output(struct sk_buff *skb)
 {
-        struct inet6_dev *idev = ip6_dst_idev(skb->dst);
+        struct inet6_dev *idev = ip6_dst_idev(skb_dst(skb));
         if (unlikely(idev->cnf.disable_ipv6)) {
-                IP6_INC_STATS(dev_net(skb->dst->dev), idev,
+                IP6_INC_STATS(dev_net(skb_dst(skb)->dev), idev,
                               IPSTATS_MIB_OUTDISCARDS);
                 kfree_skb(skb);
                 return 0;
         }
 
         if ((skb->len > ip6_skb_dst_mtu(skb) && !skb_is_gso(skb)) ||
-                                dst_allfrag(skb->dst))
+                                dst_allfrag(skb_dst(skb)))
                 return ip6_fragment(skb, ip6_output2);
         else
                 return ip6_output2(skb);
@@ -202,7 +202,7 @@ int ip6_xmit(struct sock *sk, struct sk_buff *skb, struct flowi *fl,
         struct net *net = sock_net(sk);
         struct ipv6_pinfo *np = inet6_sk(sk);
         struct in6_addr *first_hop = &fl->fl6_dst;
-        struct dst_entry *dst = skb->dst;
+        struct dst_entry *dst = skb_dst(skb);
         struct ipv6hdr *hdr;
         u8  proto = fl->proto;
         int seg_len = skb->len;
@@ -222,7 +222,7 @@ int ip6_xmit(struct sock *sk, struct sk_buff *skb, struct flowi *fl,
                 if (skb_headroom(skb) < head_room) {
                         struct sk_buff *skb2 = skb_realloc_headroom(skb, head_room);
                         if (skb2 == NULL) {
-                                IP6_INC_STATS(net, ip6_dst_idev(skb->dst),
+                                IP6_INC_STATS(net, ip6_dst_idev(skb_dst(skb)),
                                               IPSTATS_MIB_OUTDISCARDS);
                                 kfree_skb(skb);
                                 return -ENOBUFS;
@@ -276,7 +276,7 @@ int ip6_xmit(struct sock *sk, struct sk_buff *skb, struct flowi *fl,
 
         mtu = dst_mtu(dst);
         if ((skb->len <= mtu) || skb->local_df || skb_is_gso(skb)) {
-                IP6_UPD_PO_STATS(net, ip6_dst_idev(skb->dst),
+                IP6_UPD_PO_STATS(net, ip6_dst_idev(skb_dst(skb)),
                               IPSTATS_MIB_OUT, skb->len);
                 return NF_HOOK(PF_INET6, NF_INET_LOCAL_OUT, skb, NULL, dst->dev,
                                 dst_output);
@@ -286,7 +286,7 @@ int ip6_xmit(struct sock *sk, struct sk_buff *skb, struct flowi *fl,
                 printk(KERN_DEBUG "IPv6: sending pkt_too_big to self\n");
         skb->dev = dst->dev;
         icmpv6_send(skb, ICMPV6_PKT_TOOBIG, 0, mtu, skb->dev);
-        IP6_INC_STATS(net, ip6_dst_idev(skb->dst), IPSTATS_MIB_FRAGFAILS);
+        IP6_INC_STATS(net, ip6_dst_idev(skb_dst(skb)), IPSTATS_MIB_FRAGFAILS);
         kfree_skb(skb);
         return -EMSGSIZE;
 }
@@ -416,7 +416,7 @@ static inline int ip6_forward_finish(struct sk_buff *skb)
 
 int ip6_forward(struct sk_buff *skb)
 {
-        struct dst_entry *dst = skb->dst;
+        struct dst_entry *dst = skb_dst(skb);
         struct ipv6hdr *hdr = ipv6_hdr(skb);
         struct inet6_skb_parm *opt = IP6CB(skb);
         struct net *net = dev_net(dst->dev);
@@ -485,7 +485,7 @@ int ip6_forward(struct sk_buff *skb)
                 IP6_INC_STATS(net, ip6_dst_idev(dst), IPSTATS_MIB_INDISCARDS);
                 goto drop;
         }
-        dst = skb->dst;
+        dst = skb_dst(skb);
 
         /* IPv6 specs say nothing about it, but it is clear that we cannot
            send redirects to source routed frames.
@@ -566,8 +566,8 @@ static void ip6_copy_metadata(struct sk_buff *to, struct sk_buff *from)
         to->pkt_type = from->pkt_type;
         to->priority = from->priority;
         to->protocol = from->protocol;
-        dst_release(to->dst);
-        to->dst = dst_clone(from->dst);
+        skb_dst_drop(to);
+        skb_dst_set(to, dst_clone(skb_dst(from)));
         to->dev = from->dev;
         to->mark = from->mark;
 
@@ -624,7 +624,7 @@ int ip6_find_1stfragopt(struct sk_buff *skb, u8 **nexthdr)
 static int ip6_fragment(struct sk_buff *skb, int (*output)(struct sk_buff *))
 {
         struct sk_buff *frag;
-        struct rt6_info *rt = (struct rt6_info*)skb->dst;
+        struct rt6_info *rt = (struct rt6_info*)skb_dst(skb);
         struct ipv6_pinfo *np = skb->sk ? inet6_sk(skb->sk) : NULL;
         struct ipv6hdr *tmp_hdr;
         struct frag_hdr *fh;
@@ -632,7 +632,7 @@ static int ip6_fragment(struct sk_buff *skb, int (*output)(struct sk_buff *))
         __be32 frag_id = 0;
         int ptr, offset = 0, err=0;
         u8 *prevhdr, nexthdr = 0;
-        struct net *net = dev_net(skb->dst->dev);
+        struct net *net = dev_net(skb_dst(skb)->dev);
 
         hlen = ip6_find_1stfragopt(skb, &prevhdr);
         nexthdr = *prevhdr;
@@ -644,9 +644,9 @@ static int ip6_fragment(struct sk_buff *skb, int (*output)(struct sk_buff *))
          * check should be redundant, but it's free.)
          */
         if (!skb->local_df) {
-                skb->dev = skb->dst->dev;
+                skb->dev = skb_dst(skb)->dev;
                 icmpv6_send(skb, ICMPV6_PKT_TOOBIG, 0, mtu, skb->dev);
-                IP6_INC_STATS(net, ip6_dst_idev(skb->dst),
+                IP6_INC_STATS(net, ip6_dst_idev(skb_dst(skb)),
                               IPSTATS_MIB_FRAGFAILS);
                 kfree_skb(skb);
                 return -EMSGSIZE;
@@ -658,7 +658,7 @@ static int ip6_fragment(struct sk_buff *skb, int (*output)(struct sk_buff *))
         }
         mtu -= hlen + sizeof(struct frag_hdr);
 
-        if (skb_shinfo(skb)->frag_list) {
+        if (skb_has_frags(skb)) {
                 int first_len = skb_pagelen(skb);
                 int truesizes = 0;
 
@@ -667,7 +667,7 @@ static int ip6_fragment(struct sk_buff *skb, int (*output)(struct sk_buff *))
                     skb_cloned(skb))
                         goto slow_path;
 
-                for (frag = skb_shinfo(skb)->frag_list; frag; frag = frag->next) {
+                skb_walk_frags(skb, frag) {
                         /* Correct geometry. */
                         if (frag->len > mtu ||
                             ((frag->len & 7) && frag->next) ||
@@ -680,7 +680,6 @@ static int ip6_fragment(struct sk_buff *skb, int (*output)(struct sk_buff *))
 
                         BUG_ON(frag->sk);
                         if (skb->sk) {
-                                sock_hold(skb->sk);
                                 frag->sk = skb->sk;
                                 frag->destructor = sock_wfree;
                                 truesizes += frag->truesize;
@@ -690,13 +689,13 @@ static int ip6_fragment(struct sk_buff *skb, int (*output)(struct sk_buff *))
                 err = 0;
                 offset = 0;
                 frag = skb_shinfo(skb)->frag_list;
-                skb_shinfo(skb)->frag_list = NULL;
+                skb_frag_list_init(skb);
                 /* BUILD HEADER */
 
                 *prevhdr = NEXTHDR_FRAGMENT;
                 tmp_hdr = kmemdup(skb_network_header(skb), hlen, GFP_ATOMIC);
                 if (!tmp_hdr) {
-                        IP6_INC_STATS(net, ip6_dst_idev(skb->dst),
+                        IP6_INC_STATS(net, ip6_dst_idev(skb_dst(skb)),
                                       IPSTATS_MIB_FRAGFAILS);
                         return -ENOMEM;
                 }
@@ -809,7 +808,7 @@ slow_path:
 
                 if ((frag = alloc_skb(len+hlen+sizeof(struct frag_hdr)+LL_ALLOCATED_SPACE(rt->u.dst.dev), GFP_ATOMIC)) == NULL) {
                         NETDEBUG(KERN_INFO "IPv6: frag: no memory for new fragment!\n");
-                        IP6_INC_STATS(net, ip6_dst_idev(skb->dst),
+                        IP6_INC_STATS(net, ip6_dst_idev(skb_dst(skb)),
                                       IPSTATS_MIB_FRAGFAILS);
                         err = -ENOMEM;
                         goto fail;
@@ -873,16 +872,16 @@ slow_path:
                 if (err)
                         goto fail;
 
-                IP6_INC_STATS(net, ip6_dst_idev(skb->dst),
+                IP6_INC_STATS(net, ip6_dst_idev(skb_dst(skb)),
                               IPSTATS_MIB_FRAGCREATES);
         }
-        IP6_INC_STATS(net, ip6_dst_idev(skb->dst),
+        IP6_INC_STATS(net, ip6_dst_idev(skb_dst(skb)),
                       IPSTATS_MIB_FRAGOKS);
         kfree_skb(skb);
         return err;
 
 fail:
-        IP6_INC_STATS(net, ip6_dst_idev(skb->dst),
+        IP6_INC_STATS(net, ip6_dst_idev(skb_dst(skb)),
                       IPSTATS_MIB_FRAGFAILS);
         kfree_skb(skb);
         return err;
@@ -1516,10 +1515,10 @@ int ip6_push_pending_frames(struct sock *sk)
         skb->priority = sk->sk_priority;
         skb->mark = sk->sk_mark;
 
-        skb->dst = dst_clone(&rt->u.dst);
+        skb_dst_set(skb, dst_clone(&rt->u.dst));
         IP6_UPD_PO_STATS(net, rt->rt6i_idev, IPSTATS_MIB_OUT, skb->len);
         if (proto == IPPROTO_ICMPV6) {
-                struct inet6_dev *idev = ip6_dst_idev(skb->dst);
+                struct inet6_dev *idev = ip6_dst_idev(skb_dst(skb));
 
                 ICMP6MSGOUT_INC_STATS_BH(net, idev, icmp6_hdr(skb)->icmp6_type);
                 ICMP6_INC_STATS_BH(net, idev, ICMP6_MIB_OUTMSGS);
@@ -1545,8 +1544,8 @@ void ip6_flush_pending_frames(struct sock *sk)
         struct sk_buff *skb;
 
         while ((skb = __skb_dequeue_tail(&sk->sk_write_queue)) != NULL) {
-                if (skb->dst)
-                        IP6_INC_STATS(sock_net(sk), ip6_dst_idev(skb->dst),
+                if (skb_dst(skb))
+                        IP6_INC_STATS(sock_net(sk), ip6_dst_idev(skb_dst(skb)),
                                       IPSTATS_MIB_OUTDISCARDS);
                 kfree_skb(skb);
         }