5 files changed, 29 insertions, 4 deletions

diff --git a/include/net/cls_cgroup.h b/include/net/cls_cgroup.h
index 726cc353640..ef6c24a529e 100644
--- a/include/net/cls_cgroup.h
+++ b/include/net/cls_cgroup.h
@@ -27,11 +27,17 @@ struct cgroup_cls_state
 #ifdef CONFIG_NET_CLS_CGROUP
 static inline u32 task_cls_classid(struct task_struct *p)
 {
+        int classid;
+
         if (in_interrupt())
                 return 0;
 
-        return container_of(task_subsys_state(p, net_cls_subsys_id),
-                            struct cgroup_cls_state, css)->classid;
+        rcu_read_lock();
+        classid = container_of(task_subsys_state(p, net_cls_subsys_id),
+                               struct cgroup_cls_state, css)->classid;
+        rcu_read_unlock();
+
+        return classid;
 }
 #else
 extern int net_cls_subsys_id;
diff --git a/include/net/ip_vs.h b/include/net/ip_vs.h
index a4747a0f730..f976885f686 100644
--- a/include/net/ip_vs.h
+++ b/include/net/ip_vs.h
@@ -955,6 +955,9 @@ static inline __wsum ip_vs_check_diff2(__be16 old, __be16 new, __wsum oldsum)
         return csum_partial(diff, sizeof(diff), oldsum);
 }
 
+extern void ip_vs_update_conntrack(struct sk_buff *skb, struct ip_vs_conn *cp,
+                                   int outin);
+
 #endif /* __KERNEL__ */
 
 #endif  /* _NET_IP_VS_H */
diff --git a/include/net/sock.h b/include/net/sock.h
index ac53bfbdfe1..adab9dc5818 100644
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -752,6 +752,7 @@ struct proto {
         /* Keeping track of sk's, looking them up, and port selection methods. */
         void                    (*hash)(struct sock *sk);
         void                    (*unhash)(struct sock *sk);
+        void                    (*rehash)(struct sock *sk);
         int                     (*get_port)(struct sock *sk, unsigned short snum);
 
         /* Keeping track of sockets in use */
diff --git a/include/net/tcp.h b/include/net/tcp.h
index eaa9582779d..3e4b33e3660 100644
--- a/include/net/tcp.h
+++ b/include/net/tcp.h
@@ -475,8 +475,22 @@ extern unsigned int tcp_current_mss(struct sock *sk);
 /* Bound MSS / TSO packet size with the half of the window */
 static inline int tcp_bound_to_half_wnd(struct tcp_sock *tp, int pktsize)
 {
-        if (tp->max_window && pktsize > (tp->max_window >> 1))
-                return max(tp->max_window >> 1, 68U - tp->tcp_header_len);
+        int cutoff;
+
+        /* When peer uses tiny windows, there is no use in packetizing
+         * to sub-MSS pieces for the sake of SWS or making sure there
+         * are enough packets in the pipe for fast recovery.
+         *
+         * On the other hand, for extremely large MSS devices, handling
+         * smaller than MSS windows in this way does make sense.
+         */
+        if (tp->max_window >= 512)
+                cutoff = (tp->max_window >> 1);
+        else
+                cutoff = tp->max_window;
+
+        if (cutoff && pktsize > cutoff)
+                return max_t(int, cutoff, 68U - tp->tcp_header_len);
         else
                 return pktsize;
 }
diff --git a/include/net/udp.h b/include/net/udp.h
index 7abdf305da5..a184d3496b1 100644
--- a/include/net/udp.h
+++ b/include/net/udp.h
@@ -151,6 +151,7 @@ static inline void udp_lib_hash(struct sock *sk)
 }
 
 extern void udp_lib_unhash(struct sock *sk);
+extern void udp_lib_rehash(struct sock *sk, u16 new_hash);
 
 static inline void udp_lib_close(struct sock *sk, long timeout)
 {