openvswitch: Fix tracking of flags seen in TCP flows.

Flow statistics need to take into account the TCP flags from the packet
currently being processed (in 'key'), not the TCP flags matched by the
flow found in the kernel flow table (in 'flow').

This bug made the Open vSwitch userspace fin_timeout action have no effect
in many cases.
This bug is introduced by commit d3af6ec78eed57fe2b5 (openvswitch: Use
TCP flags in the flow key for stats.)

Reported-by: Len Gao <leng@vmware.com>
Signed-off-by: Ben Pfaff <blp@nicira.com>
Acked-by: Jarno Rajahalme <jrajahalme@nicira.com>
Acked-by: Jesse Gross <jesse@nicira.com>
Signed-off-by: Pravin B Shelar <pshelar@nicira.com>

diff --git a/net/openvswitch/datapath.c b/net/openvswitch/datapath.c
index 0d407bca81e3573983bc47791dddf5561d4f8ee1..a863678c50acce3b6acaa5bc58c946c0f9322de1 100644 (file)
--- a/net/openvswitch/datapath.c
+++ b/net/openvswitch/datapath.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2007-2013 Nicira, Inc.
+ * Copyright (c) 2007-2014 Nicira, Inc.
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of version 2 of the GNU General Public
@@ -276,7 +276,7 @@ void ovs_dp_process_received_packet(struct vport *p, struct sk_buff *skb)
        OVS_CB(skb)->flow = flow;
        OVS_CB(skb)->pkt_key = &key;
 
-       ovs_flow_stats_update(OVS_CB(skb)->flow, skb);
+       ovs_flow_stats_update(OVS_CB(skb)->flow, key.tp.flags, skb);
        ovs_execute_actions(dp, skb);
        stats_counter = &stats->n_hit;
 

diff --git a/net/openvswitch/flow.c b/net/openvswitch/flow.c
index 334751cb15289c4f0ca00bedec960ee1cfe19ba0..d07ab538fc9d37b78082e88906fe41c433467166 100644 (file)
--- a/net/openvswitch/flow.c
+++ b/net/openvswitch/flow.c
@@ -61,10 +61,10 @@ u64 ovs_flow_used_time(unsigned long flow_jiffies)
 
 #define TCP_FLAGS_BE16(tp) (*(__be16 *)&tcp_flag_word(tp) & htons(0x0FFF))
 
-void ovs_flow_stats_update(struct sw_flow *flow, struct sk_buff *skb)
+void ovs_flow_stats_update(struct sw_flow *flow, __be16 tcp_flags,
+                          struct sk_buff *skb)
 {
        struct flow_stats *stats;
-       __be16 tcp_flags = flow->key.tp.flags;
        int node = numa_node_id();
 
        stats = rcu_dereference(flow->stats[node]);

diff --git a/net/openvswitch/flow.h b/net/openvswitch/flow.h
index ac395d2cd821631898116b89438af7eba5d40b2f..5e5aaed3a85b0761a4831894e0c2645961790f8c 100644 (file)
--- a/net/openvswitch/flow.h
+++ b/net/openvswitch/flow.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2007-2013 Nicira, Inc.
+ * Copyright (c) 2007-2014 Nicira, Inc.
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of version 2 of the GNU General Public
@@ -180,7 +180,8 @@ struct arp_eth_header {
        unsigned char       ar_tip[4];          /* target IP address        */
 } __packed;
 
-void ovs_flow_stats_update(struct sw_flow *, struct sk_buff *);
+void ovs_flow_stats_update(struct sw_flow *, __be16 tcp_flags,
+                          struct sk_buff *);
 void ovs_flow_stats_get(const struct sw_flow *, struct ovs_flow_stats *,
                        unsigned long *used, __be16 *tcp_flags);
 void ovs_flow_stats_clear(struct sw_flow *);