aboutsummaryrefslogtreecommitdiff
path: root/net/ipv6/sit.c
diff options
context:
space:
mode:
authorXin Long <lucien.xin@gmail.com>2018-02-27 19:19:41 +0800
committerDavid S. Miller <davem@davemloft.net>2018-02-27 14:36:28 -0500
commit2b3957c34b6d7f03544b12ebbf875eee430745db (patch)
treed7002ce7bf34de3ee2372a09e271c42f4df8a033 /net/ipv6/sit.c
parenta6aa80446234ec0ad38eecdb8efc59e91daae565 (diff)
downloadlinux-stericsson-2b3957c34b6d7f03544b12ebbf875eee430745db.tar.gz
sit: fix IFLA_MTU ignored on NEWLINK
Commit 128bb975dc3c ("ip6_gre: init dev->mtu and dev->hard_header_len correctly") fixed IFLA_MTU ignored on NEWLINK for ip6_gre. The same mtu fix is also needed for sit. Note that dev->hard_header_len setting for sit works fine, no need to fix it. sit is actually ipv4 tunnel, it can't call ip6_tnl_change_mtu to set mtu. Reported-by: Jianlin Shi <jishi@redhat.com> Signed-off-by: Xin Long <lucien.xin@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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 3a1775a62973..0195598f7bb5 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);