[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>

3 files changed, 8 insertions, 26 deletions

diff --git a/net/decnet/dn_route.c b/net/decnet/dn_route.c
index 97eee5e8fbbe..66663e5d7acd 100644
--- a/net/decnet/dn_route.c
+++ b/net/decnet/dn_route.c
@@ -293,9 +293,7 @@ static int dn_insert_route(struct dn_route *rt, unsigned hash, struct dn_route *
                                            dn_rt_hash_table[hash].chain);
                         rcu_assign_pointer(dn_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(&dn_rt_hash_table[hash].lock);
 
                         dnrt_drop(rt);
@@ -308,9 +306,7 @@ static int dn_insert_route(struct dn_route *rt, unsigned hash, struct dn_route *
         rcu_assign_pointer(rt->u.dst.dn_next, dn_rt_hash_table[hash].chain);
         rcu_assign_pointer(dn_rt_hash_table[hash].chain, rt);
 
-        dst_hold(&rt->u.dst);
-        rt->u.dst.__use++;
-        rt->u.dst.lastuse = now;
+        dst_use(&rt->u.dst, now);
         spin_unlock_bh(&dn_rt_hash_table[hash].lock);
         *rp = rt;
         return 0;
@@ -1182,9 +1178,7 @@ static int __dn_route_output_key(struct dst_entry **pprt, const struct flowi *fl
                             (flp->mark == rt->fl.mark) &&
                             (rt->fl.iif == 0) &&
                             (rt->fl.oif == flp->oif)) {
-                                rt->u.dst.lastuse = jiffies;
-                                dst_hold(&rt->u.dst);
-                                rt->u.dst.__use++;
+                                dst_use(&rt->u.dst, jiffies);
                                 rcu_read_unlock_bh();
                                 *pprt = &rt->u.dst;
                                 return 0;
@@ -1456,9 +1450,7 @@ int dn_route_input(struct sk_buff *skb)
                     (rt->fl.oif == 0) &&
                     (rt->fl.mark == skb->mark) &&
                     (rt->fl.iif == cb->iif)) {
-                        rt->u.dst.lastuse = jiffies;
-                        dst_hold(&rt->u.dst);
-                        rt->u.dst.__use++;
+                        dst_use(&rt->u.dst, jiffies);
                         rcu_read_unlock();
                         skb->dst = (struct dst_entry *)rt;
                         return 0;
diff --git a/net/ipv4/route.c b/net/ipv4/route.c
index c95b270ba350..45651834e1e2 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;
diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index 973a97abc446..6ecb5e6fae2e 100644
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -544,12 +544,8 @@ restart:
         rt = rt6_device_match(rt, fl->oif, flags);
         BACKTRACK(&fl->fl6_src);
 out:
-        dst_hold(&rt->u.dst);
+        dst_use(&rt->u.dst, jiffies);
         read_unlock_bh(&table->tb6_lock);
-
-        rt->u.dst.lastuse = jiffies;
-        rt->u.dst.__use++;
-
         return rt;
 
 }