netdev - [PATCH v3 net-next 2/4] rtnetlink: return ENODEV when IFLA_ALT

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Date:   Tue,  5 Apr 2022 15:42:35 +0200
From:   Florent Fourcot <florent.fourcot@...irst.fr>
To:     netdev@...r.kernel.org
Cc:     cong.wang@...edance.com, edumazet@...gle.com,
        Florent Fourcot <florent.fourcot@...irst.fr>,
        Jiri Pirko <jiri@...lanox.com>,
        Brian Baboch <brian.baboch@...irst.fr>
Subject: [PATCH v3 net-next 2/4] rtnetlink: return ENODEV when IFLA_ALT_IFNAME is used in dellink

If IFLA_ALT_IFNAME is set and given interface is not found,
we should return ENODEV and be consistent with IFLA_IFNAME
behaviour
This commit extends feature of commit 76c9ac0ee878,
"net: rtnetlink: add possibility to use alternative names as message handle"

CC: Jiri Pirko <jiri@...lanox.com>
Signed-off-by: Florent Fourcot <florent.fourcot@...irst.fr>
Signed-off-by: Brian Baboch <brian.baboch@...irst.fr>
---
 net/core/rtnetlink.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c
index 6a5764745288..33dbeed7e531 100644
--- a/net/core/rtnetlink.c
+++ b/net/core/rtnetlink.c
@@ -3121,7 +3121,7 @@ static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh,
 		goto out;
 
 	if (!dev) {
-		if (tb[IFLA_IFNAME] || ifm->ifi_index > 0)
+		if (tb[IFLA_IFNAME] || tb[IFLA_ALT_IFNAME] || ifm->ifi_index > 0)
 			err = -ENODEV;
 
 		goto out;
-- 
2.30.2