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Diffstat (limited to 'net/ipv6/sit.c')
-rw-r--r--net/ipv6/sit.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/net/ipv6/sit.c b/net/ipv6/sit.c
index 182db078f01e..a9c4ac6efe22 100644
--- a/net/ipv6/sit.c
+++ b/net/ipv6/sit.c
@@ -1578,6 +1578,13 @@ static int ipip6_newlink(struct net *src_net, struct net_device *dev,
if (err < 0)
return err;
+ if (tb[IFLA_MTU]) {
+ u32 mtu = nla_get_u32(tb[IFLA_MTU]);
+
+ if (mtu >= IPV6_MIN_MTU && mtu <= 0xFFF8 - dev->hard_header_len)
+ dev->mtu = mtu;
+ }
+
#ifdef CONFIG_IPV6_SIT_6RD
if (ipip6_netlink_6rd_parms(data, &ip6rd))
err = ipip6_tunnel_update_6rd(nt, &ip6rd);