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openvswitch: Fix tracking of flags seen in TCP flows.

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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 88d73f6c41 (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>
This commit is contained in:
Ben Pfaff 2014-05-06 16:48:38 -07:00 committed by Pravin B Shelar
parent e0bb8c44ed
commit ad55200734
3 changed files with 7 additions and 6 deletions
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4
net/openvswitch/datapath.c
View File

@ -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 * This program is free software; you can redistribute it and/or
* modify it under the terms of version 2 of the GNU General Public * 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)->flow = flow;
OVS_CB(skb)->pkt_key = &key; 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); ovs_execute_actions(dp, skb);
stats_counter = &stats->n_hit; stats_counter = &stats->n_hit;

4
net/openvswitch/flow.c
View File

@ -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)) #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; struct flow_stats *stats;
__be16 tcp_flags = flow->key.tp.flags;
int node = numa_node_id(); int node = numa_node_id();
stats = rcu_dereference(flow->stats[node]); stats = rcu_dereference(flow->stats[node]);

5
net/openvswitch/flow.h
View File

@ -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 * This program is free software; you can redistribute it and/or
* modify it under the terms of version 2 of the GNU General Public * 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 */ unsigned char ar_tip[4]; /* target IP address */
} __packed; } __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 *, void ovs_flow_stats_get(const struct sw_flow *, struct ovs_flow_stats *,
unsigned long *used, __be16 *tcp_flags); unsigned long *used, __be16 *tcp_flags);
void ovs_flow_stats_clear(struct sw_flow *); void ovs_flow_stats_clear(struct sw_flow *);