[NET]: Make helper to get dst entry and "use" it

There are many places that get the dst entry, increase the
__use counter and set the "lastuse" time stamp.

Make a helper for this.

Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 3 insertions, 9 deletions

diff --git a/net/ipv4/route.c b/net/ipv4/route.c
index c95b270ba35..45651834e1e 100644
--- a/net/ipv4/route.c
+++ b/net/ipv4/route.c
@@ -851,9 +851,7 @@ restart:
                          */
                         rcu_assign_pointer(rt_hash_table[hash].chain, rth);
 
-                        rth->u.dst.__use++;
-                        dst_hold(&rth->u.dst);
-                        rth->u.dst.lastuse = now;
+                        dst_use(&rth->u.dst, now);
                         spin_unlock_bh(rt_hash_lock_addr(hash));
 
                         rt_drop(rt);
@@ -1930,9 +1928,7 @@ int ip_route_input(struct sk_buff *skb, __be32 daddr, __be32 saddr,
                     rth->fl.oif == 0 &&
                     rth->fl.mark == skb->mark &&
                     rth->fl.fl4_tos == tos) {
-                        rth->u.dst.lastuse = jiffies;
-                        dst_hold(&rth->u.dst);
-                        rth->u.dst.__use++;
+                        dst_use(&rth->u.dst, jiffies);
                         RT_CACHE_STAT_INC(in_hit);
                         rcu_read_unlock();
                         skb->dst = (struct dst_entry*)rth;
@@ -2326,9 +2322,7 @@ int __ip_route_output_key(struct rtable **rp, const struct flowi *flp)
                     rth->fl.mark == flp->mark &&
                     !((rth->fl.fl4_tos ^ flp->fl4_tos) &
                             (IPTOS_RT_MASK | RTO_ONLINK))) {
-                        rth->u.dst.lastuse = jiffies;
-                        dst_hold(&rth->u.dst);
-                        rth->u.dst.__use++;
+                        dst_use(&rth->u.dst, jiffies);
                         RT_CACHE_STAT_INC(out_hit);
                         rcu_read_unlock_bh();
                         *rp = rth;