[PATCH net-next 1/3] net/sched: cls_flower: Add match on the ct_state reply flag

[Paul Blakey <paulb@nvidia.com>]

Add match on the ct_state reply flag.

Example:
$ tc filter add dev ens1f0_0 ingress prio 1 chain 1 proto ip flower \
  ct_state +trk+est+rpl \
  action mirred egress redirect dev ens1f0_1
$ tc filter add dev ens1f0_1 ingress prio 1 chain 1 proto ip flower \
  ct_state +trk+est-rpl \
  action mirred egress redirect dev ens1f0_0

Signed-off-by: Paul Blakey <paulb@nvidia.com>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
---
 include/uapi/linux/pkt_cls.h | 1 +
 net/sched/cls_flower.c       | 6 ++++--
 2 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/include/uapi/linux/pkt_cls.h b/include/uapi/linux/pkt_cls.h
index 709668e..afe6836 100644
--- a/include/uapi/linux/pkt_cls.h
+++ b/include/uapi/linux/pkt_cls.h
@@ -592,6 +592,7 @@ enum {
 	TCA_FLOWER_KEY_CT_FLAGS_RELATED = 1 << 2, /* Related to an established connection. */
 	TCA_FLOWER_KEY_CT_FLAGS_TRACKED = 1 << 3, /* Conntrack has occurred. */
 	TCA_FLOWER_KEY_CT_FLAGS_INVALID = 1 << 4, /* Conntrack is invalid. */
+	TCA_FLOWER_KEY_CT_FLAGS_REPLY = 1 << 5, /* Packet is in the reply direction. */
 };
 
 enum {
diff --git a/net/sched/cls_flower.c b/net/sched/cls_flower.c
index 4a9297a..caf7643 100644
--- a/net/sched/cls_flower.c
+++ b/net/sched/cls_flower.c
@@ -291,9 +291,11 @@ struct cls_fl_filter *fl_mask_lookup(struct fl_flow_mask *mask, struct fl_flow_k
 	[IP_CT_RELATED] =		TCA_FLOWER_KEY_CT_FLAGS_TRACKED |
 					TCA_FLOWER_KEY_CT_FLAGS_RELATED,
 	[IP_CT_ESTABLISHED_REPLY] =	TCA_FLOWER_KEY_CT_FLAGS_TRACKED |
-					TCA_FLOWER_KEY_CT_FLAGS_ESTABLISHED,
+					TCA_FLOWER_KEY_CT_FLAGS_ESTABLISHED |
+					TCA_FLOWER_KEY_CT_FLAGS_REPLY,
 	[IP_CT_RELATED_REPLY] =		TCA_FLOWER_KEY_CT_FLAGS_TRACKED |
-					TCA_FLOWER_KEY_CT_FLAGS_RELATED,
+					TCA_FLOWER_KEY_CT_FLAGS_RELATED |
+					TCA_FLOWER_KEY_CT_FLAGS_REPLY,
 	[IP_CT_NEW] =			TCA_FLOWER_KEY_CT_FLAGS_TRACKED |
 					TCA_FLOWER_KEY_CT_FLAGS_NEW,
 };
-- 
1.8.3.1