net: sched: allow flower to match vxlan options

This patch is to allow matching gbp option in vxlan.

The options can be described in the form GBP/GBP_MASK,
where GBP is represented as a 32bit hexadecimal value.
Different from geneve, only one option can be set. And
also, geneve options and vxlan options can't be set at
the same time.

  # ip link add name vxlan0 type vxlan dstport 0 external
  # tc qdisc add dev vxlan0 ingress
  # tc filter add dev vxlan0 protocol ip parent ffff: \
      flower \
        enc_src_ip 10.0.99.192 \
        enc_dst_ip 10.0.99.193 \
        enc_key_id 11 \
        vxlan_opts 01020304/ffffffff \
        ip_proto udp \
        action mirred egress redirect dev eth0

v1->v2:
  - add .strict_start_type for enc_opts_policy as Jakub noticed.
  - use Duplicate instead of Wrong in err msg for extack as Jakub
    suggested.

Signed-off-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 13 insertions, 0 deletions

diff --git a/include/uapi/linux/pkt_cls.h b/include/uapi/linux/pkt_cls.h
index c6ad22f76ede..929825d710e2 100644
--- a/include/uapi/linux/pkt_cls.h
+++ b/include/uapi/linux/pkt_cls.h
@@ -571,6 +571,10 @@ enum {
 					 * TCA_FLOWER_KEY_ENC_OPT_GENEVE_
 					 * attributes
 					 */
+	TCA_FLOWER_KEY_ENC_OPTS_VXLAN,	/* Nested
+					 * TCA_FLOWER_KEY_ENC_OPT_VXLAN_
+					 * attributes
+					 */
 	__TCA_FLOWER_KEY_ENC_OPTS_MAX,
 };
 
@@ -589,6 +593,15 @@ enum {
 		(__TCA_FLOWER_KEY_ENC_OPT_GENEVE_MAX - 1)
 
 enum {
+	TCA_FLOWER_KEY_ENC_OPT_VXLAN_UNSPEC,
+	TCA_FLOWER_KEY_ENC_OPT_VXLAN_GBP,		/* u32 */
+	__TCA_FLOWER_KEY_ENC_OPT_VXLAN_MAX,
+};
+
+#define TCA_FLOWER_KEY_ENC_OPT_VXLAN_MAX \
+		(__TCA_FLOWER_KEY_ENC_OPT_VXLAN_MAX - 1)
+
+enum {
 	TCA_FLOWER_KEY_FLAGS_IS_FRAGMENT = (1 << 0),
 	TCA_FLOWER_KEY_FLAGS_FRAG_IS_FIRST = (1 << 1),
 };