diff options
| author | Paolo Abeni <pabeni@redhat.com> | 2016-11-16 16:26:46 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-12-10 19:07:22 +0100 |
| commit | 49695d1e3b817743a155e63d923e1e14b97e14eb (patch) | |
| tree | e31b3ecfbcf2b1fc76e30d0fac0367738bdf8a9d | |
| parent | 2b54505c877f71155c7aba26550015bd1e30d3dc (diff) | |
ip6_tunnel: disable caching when the traffic class is inherited
[ Upstream commit b5c2d49544e5930c96e2632a7eece3f4325a1888 ]
If an ip6 tunnel is configured to inherit the traffic class from
the inner header, the dst_cache must be disabled or it will foul
the policy routing.
The issue is apprently there since at leat Linux-2.6.12-rc2.
Reported-by: Liam McBirnie <liam.mcbirnie@boeing.com>
Cc: Liam McBirnie <liam.mcbirnie@boeing.com>
Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | net/ipv6/ip6_tunnel.c | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/net/ipv6/ip6_tunnel.c b/net/ipv6/ip6_tunnel.c index e8878886eba4..2994d1f1a661 100644 --- a/net/ipv6/ip6_tunnel.c +++ b/net/ipv6/ip6_tunnel.c @@ -1043,6 +1043,7 @@ static int ip6_tnl_xmit2(struct sk_buff *skb, struct ipv6_tel_txoption opt; struct dst_entry *dst = NULL, *ndst = NULL; struct net_device *tdev; + bool use_cache = false; int mtu; unsigned int max_headroom = sizeof(struct ipv6hdr); u8 proto; @@ -1070,7 +1071,15 @@ static int ip6_tnl_xmit2(struct sk_buff *skb, memcpy(&fl6->daddr, addr6, sizeof(fl6->daddr)); neigh_release(neigh); - } else if (!fl6->flowi6_mark) + } else if (!(t->parms.flags & + (IP6_TNL_F_USE_ORIG_TCLASS | IP6_TNL_F_USE_ORIG_FWMARK))) { + /* enable the cache only only if the routing decision does + * not depend on the current inner header value + */ + use_cache = true; + } + + if (use_cache) dst = ip6_tnl_dst_get(t); if (!ip6_tnl_xmit_ctl(t, &fl6->saddr, &fl6->daddr)) @@ -1134,7 +1143,7 @@ static int ip6_tnl_xmit2(struct sk_buff *skb, skb = new_skb; } - if (!fl6->flowi6_mark && ndst) + if (use_cache && ndst) ip6_tnl_dst_set(t, ndst); skb_dst_set(skb, dst); |