4 files changed, 57 insertions, 4 deletions

diff --git a/include/net/dst.h b/include/net/dst.h
index 59c5d18cc385..ff4da42fcfc6 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 b26bb8101981..0ae759a6c76e 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 77d4c3745cb5..ef46058d35bf 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 a6ba1f8871fd..188532ee88b6 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