4 files changed, 57 insertions, 4 deletions

diff --git a/include/net/dst.h b/include/net/dst.h
index 59c5d18cc38..ff4da42fcfc 100644
--- a/include/net/dst.h
+++ b/include/net/dst.h
@@ -36,7 +36,11 @@ struct dst_entry {
 	struct net_device       *dev;
 	struct  dst_ops	        *ops;
 	unsigned long		_metrics;
-	unsigned long		expires;
+	union {
+		unsigned long           expires;
+		/* point to where the dst_entry copied from */
+		struct dst_entry        *from;
+	};
 	struct dst_entry	*path;
 	struct neighbour __rcu	*_neighbour;
 #ifdef CONFIG_XFRM
diff --git a/include/net/ip6_fib.h b/include/net/ip6_fib.h
index b26bb810198..0ae759a6c76 100644
--- a/include/net/ip6_fib.h
+++ b/include/net/ip6_fib.h
@@ -123,6 +123,54 @@ static inline struct inet6_dev *ip6_dst_idev(struct dst_entry *dst)
 	return ((struct rt6_info *)dst)->rt6i_idev;
 }
 
+static inline void rt6_clean_expires(struct rt6_info *rt)
+{
+	if (!(rt->rt6i_flags & RTF_EXPIRES) && rt->dst.from)
+		dst_release(rt->dst.from);
+
+	rt->rt6i_flags &= ~RTF_EXPIRES;
+	rt->dst.from = NULL;
+}
+
+static inline void rt6_set_expires(struct rt6_info *rt, unsigned long expires)
+{
+	if (!(rt->rt6i_flags & RTF_EXPIRES) && rt->dst.from)
+		dst_release(rt->dst.from);
+
+	rt->rt6i_flags |= RTF_EXPIRES;
+	rt->dst.expires = expires;
+}
+
+static inline void rt6_update_expires(struct rt6_info *rt, int timeout)
+{
+	if (!(rt->rt6i_flags & RTF_EXPIRES)) {
+		if (rt->dst.from)
+			dst_release(rt->dst.from);
+		/* dst_set_expires relies on expires == 0 
+		 * if it has not been set previously.
+		 */
+		rt->dst.expires = 0;
+	}
+
+	dst_set_expires(&rt->dst, timeout);
+	rt->rt6i_flags |= RTF_EXPIRES;
+}
+
+static inline void rt6_set_from(struct rt6_info *rt, struct rt6_info *from)
+{
+	struct dst_entry *new = (struct dst_entry *) from;
+
+	if (!(rt->rt6i_flags & RTF_EXPIRES) && rt->dst.from) {
+		if (new == rt->dst.from)
+			return;
+		dst_release(rt->dst.from);
+	}
+
+	rt->rt6i_flags &= ~RTF_EXPIRES;
+	rt->dst.from = new;
+	dst_hold(new);
+}
+
 struct fib6_walker_t {
 	struct list_head lh;
 	struct fib6_node *root, *node;
diff --git a/include/net/red.h b/include/net/red.h
index 77d4c3745cb..ef46058d35b 100644
--- a/include/net/red.h
+++ b/include/net/red.h
@@ -245,7 +245,7 @@ static inline unsigned long red_calc_qavg_from_idle_time(const struct red_parms
 	 *
 	 * dummy packets as a burst after idle time, i.e.
 	 *
-	 * 	p->qavg *= (1-W)^m
+	 * 	v->qavg *= (1-W)^m
 	 *
 	 * This is an apparently overcomplicated solution (f.e. we have to
 	 * precompute a table to make this calculation in reasonable time)
@@ -279,7 +279,7 @@ static inline unsigned long red_calc_qavg_no_idle_time(const struct red_parms *p
 						       unsigned int backlog)
 {
 	/*
-	 * NOTE: p->qavg is fixed point number with point at Wlog.
+	 * NOTE: v->qavg is fixed point number with point at Wlog.
 	 * The formula below is equvalent to floating point
 	 * version:
 	 *
@@ -390,7 +390,7 @@ static inline void red_adaptative_algo(struct red_parms *p, struct red_vars *v)
 	if (red_is_idling(v))
 		qavg = red_calc_qavg_from_idle_time(p, v);
 
-	/* p->qavg is fixed point number with point at Wlog */
+	/* v->qavg is fixed point number with point at Wlog */
 	qavg >>= p->Wlog;
 
 	if (qavg > p->target_max && p->max_P <= MAX_P_MAX)
diff --git a/include/net/sock.h b/include/net/sock.h
index a6ba1f8871f..188532ee88b 100644
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -246,6 +246,7 @@ struct cg_proto;
   *	@sk_user_data: RPC layer private data
   *	@sk_sndmsg_page: cached page for sendmsg
   *	@sk_sndmsg_off: cached offset for sendmsg
+  *	@sk_peek_off: current peek_offset value
   *	@sk_send_head: front of stuff to transmit
   *	@sk_security: used by security modules
   *	@sk_mark: generic packet mark