3 files changed, 19 insertions, 7 deletions

diff --git a/include/net/ip_vs.h b/include/net/ip_vs.h
index 1fd1ee896f3..67ea2c0c0ab 100644
--- a/include/net/ip_vs.h
+++ b/include/net/ip_vs.h
@@ -520,6 +520,10 @@ struct ip_vs_conn {
         spinlock_t              lock;           /* lock for state transition */
         volatile __u16          flags;          /* status flags */
         volatile __u16          state;          /* state info */
+        volatile __u16          old_state;      /* old state, to be used for
+                                                 * state transition triggerd
+                                                 * synchronization
+                                                 */
 
         /* Control members */
         struct ip_vs_conn       *control;       /* Master control connection */
diff --git a/net/ipv4/ipvs/ip_vs_core.c b/net/ipv4/ipvs/ip_vs_core.c
index c6ed7654e83..20c884a5772 100644
--- a/net/ipv4/ipvs/ip_vs_core.c
+++ b/net/ipv4/ipvs/ip_vs_core.c
@@ -979,15 +979,23 @@ ip_vs_in(unsigned int hooknum, struct sk_buff *skb,
                 ret = NF_ACCEPT;
         }
 
-        /* increase its packet counter and check if it is needed
-           to be synchronized */
+        /* Increase its packet counter and check if it is needed
+         * to be synchronized
+         *
+         * Sync connection if it is about to close to
+         * encorage the standby servers to update the connections timeout
+         */
         atomic_inc(&cp->in_pkts);
         if ((ip_vs_sync_state & IP_VS_STATE_MASTER) &&
-            (cp->protocol != IPPROTO_TCP ||
-             cp->state == IP_VS_TCP_S_ESTABLISHED) &&
-            (atomic_read(&cp->in_pkts) % sysctl_ip_vs_sync_threshold[1]
-             == sysctl_ip_vs_sync_threshold[0]))
+            (((cp->protocol != IPPROTO_TCP ||
+               cp->state == IP_VS_TCP_S_ESTABLISHED) &&
+              (atomic_read(&cp->in_pkts) % sysctl_ip_vs_sync_threshold[1]
+               == sysctl_ip_vs_sync_threshold[0])) ||
+             ((cp->protocol == IPPROTO_TCP) && (cp->old_state != cp->state) &&
+              ((cp->state == IP_VS_TCP_S_FIN_WAIT) ||
+               (cp->state == IP_VS_TCP_S_CLOSE)))))
                 ip_vs_sync_conn(cp);
+        cp->old_state = cp->state;
 
         ip_vs_conn_put(cp);
         return ret;
diff --git a/net/ipv4/ipvs/ip_vs_sync.c b/net/ipv4/ipvs/ip_vs_sync.c
index b1694d67abb..bd930efc18d 100644
--- a/net/ipv4/ipvs/ip_vs_sync.c
+++ b/net/ipv4/ipvs/ip_vs_sync.c
@@ -343,7 +343,6 @@ static void ip_vs_process_message(const char *buffer, const size_t buflen)
                         if (!dest) {
                                 /* it is an unbound entry created by
                                  * synchronization */
-                                cp->state = ntohs(s->state);
                                 cp->flags = flags | IP_VS_CONN_F_HASHED;
                         } else
                                 atomic_dec(&dest->refcnt);
@@ -358,6 +357,7 @@ static void ip_vs_process_message(const char *buffer, const size_t buflen)
                         p += SIMPLE_CONN_SIZE;
 
                 atomic_set(&cp->in_pkts, sysctl_ip_vs_sync_threshold[0]);
+                cp->state = ntohs(s->state);
                 pp = ip_vs_proto_get(s->protocol);
                 cp->timeout = pp->timeout_table[cp->state];
                 ip_vs_conn_put(cp);