Wed, Sep 27, 2017 at 11:27:33AM CEST, simon.hor...@netronome.com wrote: >On Wed, Sep 27, 2017 at 11:10:05AM +0200, Jiri Pirko wrote: >> Wed, Sep 27, 2017 at 10:16:34AM CEST, simon.hor...@netronome.com wrote: >> >Allow matching on options in tunnel headers. >> >This makes use of existing tunnel metadata support. >> > >> >Options are a bytestring of up to 256 bytes. >> >Tunnel implementations may support less or more options, >> >or no options at all. >> > >> >e.g. >> > # ip link add name geneve0 type geneve dstport 0 external >> > # tc qdisc add dev geneve0 ingress >> > # tc filter add dev geneve0 protocol ip parent ffff: \ >> > flower \ >> > enc_src_ip 10.0.99.192 \ >> > enc_dst_ip 10.0.99.193 \ >> > enc_key_id 11 \ >> > enc_opts 0102800100800020/fffffffffffffff0 \ >> > ip_proto udp \ >> > action mirred egress redirect dev eth1 >> > >> >Signed-off-by: Simon Horman <simon.hor...@netronome.com> >> >Reviewed-by: Jakub Kicinski <jakub.kicin...@netronome.com> >> > >> >--- >> >v2 >> >* Correct example which was incorrectly described setting rather >> > than matching tunnel options >> >--- >> > include/net/flow_dissector.h | 13 +++++++++++++ >> > include/uapi/linux/pkt_cls.h | 3 +++ >> > net/sched/cls_flower.c | 35 ++++++++++++++++++++++++++++++++++- >> > 3 files changed, 50 insertions(+), 1 deletion(-) >> > >> >diff --git a/include/net/flow_dissector.h b/include/net/flow_dissector.h >> >index fc3dce730a6b..43f98bf0b349 100644 >> >--- a/include/net/flow_dissector.h >> >+++ b/include/net/flow_dissector.h >> >@@ -183,6 +183,18 @@ struct flow_dissector_key_ip { >> > __u8 ttl; >> > }; >> > >> >+/** >> >+ * struct flow_dissector_key_enc_opts: >> >+ * @data: data >> >+ * @len: len >> >+ */ >> >+struct flow_dissector_key_enc_opts { >> >+ u8 data[256]; /* Using IP_TUNNEL_OPTS_MAX is desired here >> >+ * but seems difficult to #include >> >+ */ >> >+ u8 len; >> >+}; >> >+ >> > enum flow_dissector_key_id { >> > FLOW_DISSECTOR_KEY_CONTROL, /* struct flow_dissector_key_control */ >> > FLOW_DISSECTOR_KEY_BASIC, /* struct flow_dissector_key_basic */ >> >@@ -205,6 +217,7 @@ enum flow_dissector_key_id { >> > FLOW_DISSECTOR_KEY_MPLS, /* struct flow_dissector_key_mpls */ >> > FLOW_DISSECTOR_KEY_TCP, /* struct flow_dissector_key_tcp */ >> > FLOW_DISSECTOR_KEY_IP, /* struct flow_dissector_key_ip */ >> >+ FLOW_DISSECTOR_KEY_ENC_OPTS, /* struct flow_dissector_key_enc_opts */ >> >> I don't see the actual dissection implementation. Where is it? >> Did you test the patchset? > >Yes, I did test it. But it is also possible something went astray along the >way and I will retest. > >I think that the code you are looking for is in >fl_classify() in this patch.
The dissection should be done in the flow_dissector. That's the whole point in having it generic. You should move it there.