diff options
| author | Xin Long <lucien.xin@gmail.com> | 2018-02-27 19:19:41 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-05-30 07:49:02 +0200 |
| commit | fac4749afebe9496f483a6ef64993c456e520eeb (patch) | |
| tree | 1508a929d0b5026674cf03ace511208f9c1390c2 /net | |
| parent | 3d0dca33a2346608db5c3466f2f654e1e2e9e76e (diff) | |
sit: fix IFLA_MTU ignored on NEWLINK
[ Upstream commit 2b3957c34b6d7f03544b12ebbf875eee430745db ]
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>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'net')
| -rw-r--r-- | net/ipv6/sit.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/net/ipv6/sit.c b/net/ipv6/sit.c index 51f7c32f04d7..dec4e7bda5f3 100644 --- a/net/ipv6/sit.c +++ b/net/ipv6/sit.c @@ -1574,6 +1574,13 @@ 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); |