netdev - [PATCH net-next 13/14] net/sched: matchall: Avoid overwriting error messages

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Message-Id: <20220407073533.2422896-14-idosch@nvidia.com>
Date:   Thu,  7 Apr 2022 10:35:32 +0300
From:   Ido Schimmel <idosch@...dia.com>
To:     netdev@...r.kernel.org
Cc:     davem@...emloft.net, kuba@...nel.org, pabeni@...hat.com,
        jhs@...atatu.com, xiyou.wangcong@...il.com, jiri@...nulli.us,
        petrm@...dia.com, jianbol@...dia.com, roid@...dia.com,
        vladbu@...dia.com, olteanv@...il.com, simon.horman@...igine.com,
        baowen.zheng@...igine.com, marcelo.leitner@...il.com,
        Ido Schimmel <idosch@...dia.com>
Subject: [PATCH net-next 13/14] net/sched: matchall: Avoid overwriting error messages

The various error paths of tc_setup_offload_action() now report specific
error messages. Remove the generic messages to avoid overwriting the
more specific ones.

Before:

 # tc filter add dev dummy0 ingress pref 1 proto all matchall skip_sw action police rate 100Mbit burst 10000
 Error: cls_matchall: Failed to setup flow action.
 We have an error talking to the kernel

After:

 # tc filter add dev dummy0 ingress pref 1 proto all matchall skip_sw action police rate 100Mbit burst 10000
 Error: act_police: Offload not supported when conform/exceed action is "reclassify".
 We have an error talking to the kernel

Signed-off-by: Ido Schimmel <idosch@...dia.com>
Reviewed-by: Petr Machata <petrm@...dia.com>
---
 net/sched/cls_matchall.c | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/net/sched/cls_matchall.c b/net/sched/cls_matchall.c
index 7553443e1ae7..06cf22adbab7 100644
--- a/net/sched/cls_matchall.c
+++ b/net/sched/cls_matchall.c
@@ -102,8 +102,6 @@ static int mall_replace_hw_filter(struct tcf_proto *tp,
 	if (err) {
 		kfree(cls_mall.rule);
 		mall_destroy_hw_filter(tp, head, cookie, NULL);
-		NL_SET_ERR_MSG_MOD(cls_mall.common.extack,
-				   "Failed to setup flow action");
 
 		return skip_sw ? err : 0;
 	}
@@ -305,8 +303,6 @@ static int mall_reoffload(struct tcf_proto *tp, bool add, flow_setup_cb_t *cb,
 				      cls_mall.common.extack);
 	if (err) {
 		kfree(cls_mall.rule);
-		NL_SET_ERR_MSG_MOD(cls_mall.common.extack,
-				   "Failed to setup flow action");
 
 		return add && tc_skip_sw(head->flags) ? err : 0;
 	}
-- 
2.33.1