netdev - [PATCH net-next v2] flow_offload: improve extack msg for user when adding invalid filter

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Message-Id: <1646191769-17761-1-git-send-email-baowen.zheng@corigine.com>
Date:   Wed,  2 Mar 2022 11:29:29 +0800
From:   Baowen Zheng <baowen.zheng@...igine.com>
To:     davem@...emloft.net, kuba@...nel.org
Cc:     xiyou.wangcong@...il.com, jhs@...atatu.com, netdev@...r.kernel.org,
        oss-drivers@...igine.com, simon.horman@...igine.com,
        roid@...dia.com
Subject: [PATCH net-next v2] flow_offload: improve extack msg for user when adding invalid filter

Add extack message to return exact message to user when adding invalid
filter with conflict flags for TC action.

In previous implement we just return EINVAL which is confusing for user.

Signed-off-by: Baowen Zheng <baowen.zheng@...igine.com>
Reviewed-by: Roi Dayan <roid@...dia.com>
---
 net/sched/act_api.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/net/sched/act_api.c b/net/sched/act_api.c
index ca03e72..4f51094 100644
--- a/net/sched/act_api.c
+++ b/net/sched/act_api.c
@@ -1446,6 +1446,8 @@ int tcf_action_init(struct net *net, struct tcf_proto *tp, struct nlattr *nla,
 				continue;
 			if (skip_sw != tc_act_skip_sw(act->tcfa_flags) ||
 			    skip_hw != tc_act_skip_hw(act->tcfa_flags)) {
+				NL_SET_ERR_MSG(extack,
+					       "Mismatch between action and filter offload flags");
 				err = -EINVAL;
 				goto err;
 			}
-- 
2.5.0