From d5ccfd90df7fd0a50038a68634c131b8fd081bac Mon Sep 17 00:00:00 2001 From: Ido Schimmel Date: Mon, 29 May 2023 14:48:29 +0300 Subject: [PATCH] flow_dissector: Dissect layer 2 miss from tc skb extension Extend the 'FLOW_DISSECTOR_KEY_META' key with a new 'l2_miss' field and populate it from a field with the same name in the tc skb extension. This field is set by the bridge driver for packets that incur an FDB or MDB miss. The next patch will extend the flower classifier to be able to match on layer 2 misses. Signed-off-by: Ido Schimmel Reviewed-by: Nikolay Aleksandrov Signed-off-by: Jakub Kicinski --- include/net/flow_dissector.h | 2 ++ net/core/flow_dissector.c | 10 ++++++++++ 2 files changed, 12 insertions(+) diff --git a/include/net/flow_dissector.h b/include/net/flow_dissector.h index 85b2281..8b41668 100644 --- a/include/net/flow_dissector.h +++ b/include/net/flow_dissector.h @@ -243,10 +243,12 @@ struct flow_dissector_key_ip { * struct flow_dissector_key_meta: * @ingress_ifindex: ingress ifindex * @ingress_iftype: ingress interface type + * @l2_miss: packet did not match an L2 entry during forwarding */ struct flow_dissector_key_meta { int ingress_ifindex; u16 ingress_iftype; + u8 l2_miss; }; /** diff --git a/net/core/flow_dissector.c b/net/core/flow_dissector.c index 25fb0bb..481ca40 100644 --- a/net/core/flow_dissector.c +++ b/net/core/flow_dissector.c @@ -27,6 +27,7 @@ #include #include #include +#include #include #include #include @@ -241,6 +242,15 @@ void skb_flow_dissect_meta(const struct sk_buff *skb, FLOW_DISSECTOR_KEY_META, target_container); meta->ingress_ifindex = skb->skb_iif; +#if IS_ENABLED(CONFIG_NET_TC_SKB_EXT) + if (tc_skb_ext_tc_enabled()) { + struct tc_skb_ext *ext; + + ext = skb_ext_find(skb, TC_SKB_EXT); + if (ext) + meta->l2_miss = ext->l2_miss; + } +#endif } EXPORT_SYMBOL(skb_flow_dissect_meta); -- 2.7.4