[PATCH/RFC 2/3] net/sched: act_tunnel_key: add extended ack support

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

Add extended ack support for the tunnel key action by using NL_SET_ERR_MSG
during validation of user input.

Signed-off-by: Simon Horman <simon.horman@netronome.com>
Signed-off-by: Pieter Jansen van Vuuren <pieter.jansenvanvuuren@netronome.com>
Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com>
---
 net/sched/act_tunnel_key.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/net/sched/act_tunnel_key.c b/net/sched/act_tunnel_key.c
index 7ce95538177b..c0bbdec50022 100644
--- a/net/sched/act_tunnel_key.c
+++ b/net/sched/act_tunnel_key.c
@@ -90,12 +90,14 @@ static int tunnel_key_init(struct net *net, struct nlattr *nla,
 		return -EINVAL;
 
 	err = nla_parse_nested(tb, TCA_TUNNEL_KEY_MAX, nla, tunnel_key_policy,
-			       NULL);
+			       extack);
 	if (err < 0)
 		return err;
 
-	if (!tb[TCA_TUNNEL_KEY_PARMS])
+	if (!tb[TCA_TUNNEL_KEY_PARMS]) {
+		NL_SET_ERR_MSG(extack, "Missing tunnel key parameter");
 		return -EINVAL;
+	}
 
 	parm = nla_data(tb[TCA_TUNNEL_KEY_PARMS]);
 	exists = tcf_idr_check(tn, parm->index, a, bind);
@@ -107,6 +109,7 @@ static int tunnel_key_init(struct net *net, struct nlattr *nla,
 		break;
 	case TCA_TUNNEL_KEY_ACT_SET:
 		if (!tb[TCA_TUNNEL_KEY_ENC_KEY_ID]) {
+			NL_SET_ERR_MSG(extack, "Missing tunnel key enc id");
 			ret = -EINVAL;
 			goto err_out;
 		}
@@ -144,6 +147,7 @@ static int tunnel_key_init(struct net *net, struct nlattr *nla,
 						      0, flags,
 						      key_id, 0);
 		} else {
+			NL_SET_ERR_MSG(extack, "Missing both ipv4 and ipv6 enc src and dst");
 			ret = -EINVAL;
 			goto err_out;
 		}
-- 
2.11.0