[PATCH net 2/2] net/sched: act_api: add specific EXT_WARN_MSG for tc action

[Hangbin Liu <liuhangbin@gmail.com>]

In my previous commit 0349b8779cc9 ("sched: add new attr TCA_EXT_WARN_MSG to
report tc extact message") I didn't notice the tc action use different
enum with filter. So we can't use TCA_EXT_WARN_MSG directly for tc action.
Let's add a TCA_ACT_EXT_WARN_MSG for tc action specifically and put this
param before going to the TCA_ACT_TAB nest.

Fixes: 0349b8779cc9 ("sched: add new attr TCA_EXT_WARN_MSG to report tc extact message")
Signed-off-by: Hangbin Liu <liuhangbin@gmail.com>
---
 include/uapi/linux/rtnetlink.h | 1 +
 net/sched/act_api.c            | 8 ++++----
 2 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/include/uapi/linux/rtnetlink.h b/include/uapi/linux/rtnetlink.h
index 25a0af57dd5e..5ad3448a1fa7 100644
--- a/include/uapi/linux/rtnetlink.h
+++ b/include/uapi/linux/rtnetlink.h
@@ -789,6 +789,7 @@ enum {
 	TCA_ROOT_FLAGS,
 	TCA_ROOT_COUNT,
 	TCA_ROOT_TIME_DELTA, /* in msecs */
+	TCA_ACT_EXT_WARN_MSG,
 	__TCA_ROOT_MAX,
 #define	TCA_ROOT_MAX (__TCA_ROOT_MAX - 1)
 };
diff --git a/net/sched/act_api.c b/net/sched/act_api.c
index fce522886099..f960cb534ca0 100644
--- a/net/sched/act_api.c
+++ b/net/sched/act_api.c
@@ -1589,6 +1589,10 @@ static int tca_get_fill(struct sk_buff *skb, struct tc_action *actions[],
 	t->tca__pad1 = 0;
 	t->tca__pad2 = 0;
 
+	if (extack && extack->_msg &&
+	    nla_put_string(skb, TCA_ACT_EXT_WARN_MSG, extack->_msg))
+		goto out_nlmsg_trim;
+
 	nest = nla_nest_start_noflag(skb, TCA_ACT_TAB);
 	if (!nest)
 		goto out_nlmsg_trim;
@@ -1598,10 +1602,6 @@ static int tca_get_fill(struct sk_buff *skb, struct tc_action *actions[],
 
 	nla_nest_end(skb, nest);
 
-	if (extack && extack->_msg &&
-	    nla_put_string(skb, TCA_EXT_WARN_MSG, extack->_msg))
-		goto out_nlmsg_trim;
-
 	nlh->nlmsg_len = skb_tail_pointer(skb) - b;
 
 	return skb->len;
-- 
2.38.1