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ip_tunnel(ipv4): fix tunnels with "local any remote $remote_ip"

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Ipv4 tunnels created with "local any remote $ip" didn't work properly since
7d442fab0 (ipv4: Cache dst in tunnels). 99% of packets sent via those tunnels
had src addr = 0.0.0.0. That was because only dst_entry was cached, although
fl4.saddr has to be cached too. Every time ip_tunnel_xmit used cached dst_entry
(tunnel_rtable_get returned non-NULL), fl4.saddr was initialized with
tnl_params->saddr (= 0 in our case), and wasn't changed until iptunnel_xmit().

This patch adds saddr to ip_tunnel->dst_cache, fixing this issue.

Reported-by: Sergey Popov <pinkbyte@gentoo.org>
Signed-off-by: Dmitry Popov <ixaphire@qrator.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Dmitry Popov
2014-07-29 03:07:52 +04:00
committed by David S. Miller
parent dabf24d168
commit 95cb574598
2 changed files with 19 additions and 11 deletions
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include/net/ip_tunnels.h
+1
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@@ -40,6 +40,7 @@ struct ip_tunnel_prl_entry {
struct ip_tunnel_dst {
struct dst_entry __rcu *dst;
__be32 saddr;
};
struct ip_tunnel {