[PATCH net-next v3 1/8] nfp: flower: move non-zero chain check

[Simon Horman <simon.horman@corigine.com>]

From: Louis Peens <louis.peens@corigine.com>

This is in preparation for conntrack offload support which makes
used of different chains. Add explicit checks for conntrack and
non-zero chains in the add_offload path.

Signed-off-by: Louis Peens <louis.peens@corigine.com>
Signed-off-by: Yinjun Zhang <yinjun.zhang@corigine.com>
Signed-off-by: Simon Horman <simon.horman@corigine.com>
---
 .../ethernet/netronome/nfp/flower/offload.c   | 24 +++++++++++++++----
 1 file changed, 19 insertions(+), 5 deletions(-)

diff --git a/drivers/net/ethernet/netronome/nfp/flower/offload.c b/drivers/net/ethernet/netronome/nfp/flower/offload.c
index e95969c462e4..16ef960a150d 100644
--- a/drivers/net/ethernet/netronome/nfp/flower/offload.c
+++ b/drivers/net/ethernet/netronome/nfp/flower/offload.c
@@ -1276,6 +1276,20 @@ nfp_flower_validate_pre_tun_rule(struct nfp_app *app,
 	return 0;
 }
 
+static bool offload_pre_check(struct flow_cls_offload *flow)
+{
+	struct flow_rule *rule = flow_cls_offload_flow_rule(flow);
+	struct flow_dissector *dissector = rule->match.dissector;
+
+	if (dissector->used_keys & BIT(FLOW_DISSECTOR_KEY_CT))
+		return false;
+
+	if (flow->common.chain_index)
+		return false;
+
+	return true;
+}
+
 /**
  * nfp_flower_add_offload() - Adds a new flow to hardware.
  * @app:	Pointer to the APP handle
@@ -1302,6 +1316,9 @@ nfp_flower_add_offload(struct nfp_app *app, struct net_device *netdev,
 	if (nfp_netdev_is_nfp_repr(netdev))
 		port = nfp_port_from_netdev(netdev);
 
+	if (!offload_pre_check(flow))
+		return -EOPNOTSUPP;
+
 	key_layer = kmalloc(sizeof(*key_layer), GFP_KERNEL);
 	if (!key_layer)
 		return -ENOMEM;
@@ -1646,9 +1663,10 @@ nfp_flower_repr_offload(struct nfp_app *app, struct net_device *netdev,
 static int nfp_flower_setup_tc_block_cb(enum tc_setup_type type,
 					void *type_data, void *cb_priv)
 {
+	struct flow_cls_common_offload *common = type_data;
 	struct nfp_repr *repr = cb_priv;
 
-	if (!tc_cls_can_offload_and_chain0(repr->netdev, type_data))
+	if (!tc_can_offload_extack(repr->netdev, common->extack))
 		return -EOPNOTSUPP;
 
 	switch (type) {
@@ -1746,10 +1764,6 @@ static int nfp_flower_setup_indr_block_cb(enum tc_setup_type type,
 					  void *type_data, void *cb_priv)
 {
 	struct nfp_flower_indr_block_cb_priv *priv = cb_priv;
-	struct flow_cls_offload *flower = type_data;
-
-	if (flower->common.chain_index)
-		return -EOPNOTSUPP;
 
 	switch (type) {
 	case TC_SETUP_CLSFLOWER:
-- 
2.20.1