net: skb->dst accessors

Define three accessors to get/set dst attached to a skb

struct dst_entry *skb_dst(const struct sk_buff *skb)

void skb_dst_set(struct sk_buff *skb, struct dst_entry *dst)

void skb_dst_drop(struct sk_buff *skb)
This one should replace occurrences of :
dst_release(skb->dst)
skb->dst = NULL;

Delete skb->dst field

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 5 insertions, 5 deletions

diff --git a/net/ipv4/icmp.c b/net/ipv4/icmp.c
index 94f75efae938..97c410e84388 100644
--- a/net/ipv4/icmp.c
+++ b/net/ipv4/icmp.c
@@ -591,13 +591,13 @@ void icmp_send(struct sk_buff *skb_in, int type, int code, __be32 info)
                                 goto relookup_failed;
 
                         /* Ugh! */
-                        odst = skb_in->dst;
+                        odst = skb_dst(skb_in);
                         err = ip_route_input(skb_in, fl.fl4_dst, fl.fl4_src,
                                              RT_TOS(tos), rt2->u.dst.dev);
 
                         dst_release(&rt2->u.dst);
                         rt2 = skb_rtable(skb_in);
-                        skb_in->dst = odst;
+                        skb_dst_set(skb_in, odst);
                 }
 
                 if (err)
@@ -659,7 +659,7 @@ static void icmp_unreach(struct sk_buff *skb)
         u32 info = 0;
         struct net *net;
 
-        net = dev_net(skb->dst->dev);
+        net = dev_net(skb_dst(skb)->dev);
 
         /*
          *      Incomplete header ?
@@ -822,7 +822,7 @@ static void icmp_echo(struct sk_buff *skb)
 {
         struct net *net;
 
-        net = dev_net(skb->dst->dev);
+        net = dev_net(skb_dst(skb)->dev);
         if (!net->ipv4.sysctl_icmp_echo_ignore_all) {
                 struct icmp_bxm icmp_param;
 
@@ -873,7 +873,7 @@ static void icmp_timestamp(struct sk_buff *skb)
 out:
         return;
 out_err:
-        ICMP_INC_STATS_BH(dev_net(skb->dst->dev), ICMP_MIB_INERRORS);
+        ICMP_INC_STATS_BH(dev_net(skb_dst(skb)->dev), ICMP_MIB_INERRORS);
         goto out;
 }