From 71c99e32b926159ea628352751f66383d7d04d17 Mon Sep 17 00:00:00 2001 From: Stanislav Fomichev Date: Thu, 25 Jul 2019 15:52:30 -0700 Subject: bpf/flow_dissector: support ipv6 flow_label and BPF_FLOW_DISSECTOR_F_STOP_AT_FLOW_LABEL Add support for exporting ipv6 flow label via bpf_flow_keys. Export flow label from bpf_flow.c and also return early when BPF_FLOW_DISSECTOR_F_STOP_AT_FLOW_LABEL is passed. Acked-by: Petar Penkov Acked-by: Willem de Bruijn Acked-by: Song Liu Cc: Song Liu Cc: Willem de Bruijn Cc: Petar Penkov Signed-off-by: Stanislav Fomichev Signed-off-by: Alexei Starovoitov --- net/core/flow_dissector.c | 9 +++++++++ 1 file changed, 9 insertions(+) (limited to 'net/core/flow_dissector.c') diff --git a/net/core/flow_dissector.c b/net/core/flow_dissector.c index 50ed1a688709..9741b593ea53 100644 --- a/net/core/flow_dissector.c +++ b/net/core/flow_dissector.c @@ -737,6 +737,7 @@ static void __skb_flow_bpf_to_target(const struct bpf_flow_keys *flow_keys, struct flow_dissector_key_basic *key_basic; struct flow_dissector_key_addrs *key_addrs; struct flow_dissector_key_ports *key_ports; + struct flow_dissector_key_tags *key_tags; key_control = skb_flow_dissector_target(flow_dissector, FLOW_DISSECTOR_KEY_CONTROL, @@ -781,6 +782,14 @@ static void __skb_flow_bpf_to_target(const struct bpf_flow_keys *flow_keys, key_ports->src = flow_keys->sport; key_ports->dst = flow_keys->dport; } + + if (dissector_uses_key(flow_dissector, + FLOW_DISSECTOR_KEY_FLOW_LABEL)) { + key_tags = skb_flow_dissector_target(flow_dissector, + FLOW_DISSECTOR_KEY_FLOW_LABEL, + target_container); + key_tags->flow_label = ntohl(flow_keys->flow_label); + } } bool bpf_flow_dissect(struct bpf_prog *prog, struct bpf_flow_dissector *ctx, -- cgit v1.2.3-59-g8ed1b