From f7d49bce8e741e1e6aa14ce4db1b6cea7e4be4e8 Mon Sep 17 00:00:00 2001 From: Jiri Benc Date: Fri, 30 Sep 2016 19:08:05 +0200 Subject: [PATCH] openvswitch: mpls: set network header correctly on key extract After the 48d2ab609b6b ("net: mpls: Fixups for GSO"), MPLS handling in openvswitch was changed to have network header pointing to the start of the MPLS headers and inner_network_header pointing after the MPLS headers. However, key_extract was missed by the mentioned commit, causing incorrect headers to be set when a MPLS packet just enters the bridge or after it is recirculated. Fixes: 48d2ab609b6b ("net: mpls: Fixups for GSO") Signed-off-by: Jiri Benc Acked-by: Pravin B Shelar Signed-off-by: David S. Miller --- net/openvswitch/flow.c | 11 +++-------- 1 file changed, 3 insertions(+), 8 deletions(-) diff --git a/net/openvswitch/flow.c b/net/openvswitch/flow.c index 634cc10d6dee..c8c82e109c68 100644 --- a/net/openvswitch/flow.c +++ b/net/openvswitch/flow.c @@ -633,12 +633,7 @@ static int key_extract(struct sk_buff *skb, struct sw_flow_key *key) } else if (eth_p_mpls(key->eth.type)) { size_t stack_len = MPLS_HLEN; - /* In the presence of an MPLS label stack the end of the L2 - * header and the beginning of the L3 header differ. - * - * Advance network_header to the beginning of the L3 - * header. mac_len corresponds to the end of the L2 header. - */ + skb_set_inner_network_header(skb, skb->mac_len); while (1) { __be32 lse; @@ -646,12 +641,12 @@ static int key_extract(struct sk_buff *skb, struct sw_flow_key *key) if (unlikely(error)) return 0; - memcpy(&lse, skb_network_header(skb), MPLS_HLEN); + memcpy(&lse, skb_inner_network_header(skb), MPLS_HLEN); if (stack_len == MPLS_HLEN) memcpy(&key->mpls.top_lse, &lse, MPLS_HLEN); - skb_set_network_header(skb, skb->mac_len + stack_len); + skb_set_inner_network_header(skb, skb->mac_len + stack_len); if (lse & htonl(MPLS_LS_S_MASK)) break; -- 2.20.1