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, 2 insertions, 4 deletions

diff --git a/net/packet/af_packet.c b/net/packet/af_packet.c
index 6da9f38ef5c1..4f76e5552d8e 100644
--- a/net/packet/af_packet.c
+++ b/net/packet/af_packet.c
@@ -372,8 +372,7 @@ static int packet_rcv_spkt(struct sk_buff *skb, struct net_device *dev,  struct
                 goto oom;
 
         /* drop any routing info */
-        dst_release(skb->dst);
-        skb->dst = NULL;
+        skb_dst_drop(skb);
 
         /* drop conntrack reference */
         nf_reset(skb);
@@ -621,8 +620,7 @@ static int packet_rcv(struct sk_buff *skb, struct net_device *dev, struct packet
 
         skb_set_owner_r(skb, sk);
         skb->dev = NULL;
-        dst_release(skb->dst);
-        skb->dst = NULL;
+        skb_dst_drop(skb);
 
         /* drop conntrack reference */
         nf_reset(skb);