[PATCH net-next 4/5] nfp: flower: validate encapsulation control flags

["Asbjørn Sloth Tønnesen" <ast@fiberby.net>]

Encapsulation control flags are currently not used anywhere,
so all flags are currently unsupported by all drivers.

This patch adds validation of this assumption, so that
encapsulation flags may be used in the future.

In case any encapsulation control flags are masked,
flow_rule_match_has_enc_control_flags() sets a NL extended
error message, and we return -EOPNOTSUPP.

Only compile tested.

Signed-off-by: Asbjørn Sloth Tønnesen <ast@fiberby.net>
---
 drivers/net/ethernet/netronome/nfp/flower/offload.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/net/ethernet/netronome/nfp/flower/offload.c b/drivers/net/ethernet/netronome/nfp/flower/offload.c
index 8e0a890381b60..46ffc2c208930 100644
--- a/drivers/net/ethernet/netronome/nfp/flower/offload.c
+++ b/drivers/net/ethernet/netronome/nfp/flower/offload.c
@@ -321,6 +321,10 @@ nfp_flower_calculate_key_layers(struct nfp_app *app,
 
 		flow_rule_match_enc_control(rule, &enc_ctl);
 
+		if (flow_rule_has_enc_control_flags(enc_ctl.mask->flags,
+						    extack))
+			return -EOPNOTSUPP;
+
 		if (enc_ctl.mask->addr_type != 0xffff) {
 			NL_SET_ERR_MSG_MOD(extack, "unsupported offload: wildcarded protocols on tunnels are not supported");
 			return -EOPNOTSUPP;
-- 
2.45.1