[lkml]   [2018]   [Jul]   [20]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
Patch in this message
Subject[PATCH 4.9 18/66] ipvlan: fix IFLA_MTU ignored on NEWLINK
4.9-stable review patch.  If anyone has any objections, please let me know.


From: Xin Long <>

[ Upstream commit 30877961b1cdd6fdca783c2e8c4f0f47e95dc58c ]

Commit 296d48568042 ("ipvlan: inherit MTU from master device") adjusted
the mtu from the master device when creating a ipvlan device, but it
would also override the mtu value set in rtnl_create_link. It causes
IFLA_MTU param not to take effect.

So this patch is to not adjust the mtu if IFLA_MTU param is set when
creating a ipvlan device.

Fixes: 296d48568042 ("ipvlan: inherit MTU from master device")
Reported-by: Jianlin Shi <>
Signed-off-by: Xin Long <>
Signed-off-by: David S. Miller <>
Signed-off-by: Greg Kroah-Hartman <>
drivers/net/ipvlan/ipvlan_main.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)

--- a/drivers/net/ipvlan/ipvlan_main.c
+++ b/drivers/net/ipvlan/ipvlan_main.c
@@ -525,7 +525,8 @@ static int ipvlan_link_new(struct net *s
ipvlan->dev = dev;
ipvlan->port = port;
ipvlan->sfeatures = IPVLAN_FEATURES;
- ipvlan_adjust_mtu(ipvlan, phy_dev);
+ if (!tb[IFLA_MTU])
+ ipvlan_adjust_mtu(ipvlan, phy_dev);

/* TODO Probably put random address here to be presented to the

 \ /
  Last update: 2018-07-20 14:30    [W:0.197 / U:0.316 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site