From 2d79849903e00fb445038ddd8afb2acfbf89eb7f Mon Sep 17 00:00:00 2001 From: Jiri Benc Date: Tue, 18 Aug 2015 18:42:09 +0200 Subject: [PATCH] lwtunnel: ip tunnel: fix multiple routes with different encap Currently, two routes going through the same tunnel interface are considered the same even when they are routed to a different host after encapsulation. This causes all routes added after the first one to have incorrect encapsulation parameters. This is nicely visible by doing: # ip r a 192.168.1.2/32 dev vxlan0 tunnel dst 10.0.0.2 # ip r a 192.168.1.3/32 dev vxlan0 tunnel dst 10.0.0.3 # ip r [...] 192.168.1.2/32 tunnel id 0 src 0.0.0.0 dst 10.0.0.2 [...] 192.168.1.3/32 tunnel id 0 src 0.0.0.0 dst 10.0.0.2 [...] Implement the missing comparison function. Fixes: 3093fbe7ff4bc ("route: Per route IP tunnel metadata via lightweight tunnel") Signed-off-by: Jiri Benc Signed-off-by: David S. Miller --- net/ipv4/ip_tunnel_core.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/net/ipv4/ip_tunnel_core.c b/net/ipv4/ip_tunnel_core.c index fd6319681c50..1c2389d582a6 100644 --- a/net/ipv4/ip_tunnel_core.c +++ b/net/ipv4/ip_tunnel_core.c @@ -286,10 +286,17 @@ static int ip_tun_encap_nlsize(struct lwtunnel_state *lwtstate) + nla_total_size(2); /* LWTUNNEL_IP_FLAGS */ } +static int ip_tun_cmp_encap(struct lwtunnel_state *a, struct lwtunnel_state *b) +{ + return memcmp(lwt_tun_info(a), lwt_tun_info(b), + sizeof(struct ip_tunnel_info)); +} + static const struct lwtunnel_encap_ops ip_tun_lwt_ops = { .build_state = ip_tun_build_state, .fill_encap = ip_tun_fill_encap_info, .get_encap_size = ip_tun_encap_nlsize, + .cmp_encap = ip_tun_cmp_encap, }; void __init ip_tunnel_core_init(void)