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| author | Haishuang Yan <yanhaishuang@cmss.chinamobile.com> | 2019-09-27 14:58:20 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-10-07 18:58:17 +0200 |
| commit | 7edcdec673dc7e2c55c9fad8ae0e2ad211bf6350 (patch) | |
| tree | 5574f3954d3592f85e61746a2d6673c8a767fbbd /net | |
| parent | a203f2d6b4eae63a962bc8e67f67a7e7eb3214a6 (diff) | |
| download | linux-stable-7edcdec673dc7e2c55c9fad8ae0e2ad211bf6350.tar.gz linux-stable-7edcdec673dc7e2c55c9fad8ae0e2ad211bf6350.tar.bz2 linux-stable-7edcdec673dc7e2c55c9fad8ae0e2ad211bf6350.zip | |
erspan: remove the incorrect mtu limit for erspan
[ Upstream commit 0e141f757b2c78c983df893e9993313e2dc21e38 ]
erspan driver calls ether_setup(), after commit 61e84623ace3
("net: centralize net_device min/max MTU checking"), the range
of mtu is [min_mtu, max_mtu], which is [68, 1500] by default.
It causes the dev mtu of the erspan device to not be greater
than 1500, this limit value is not correct for ipgre tap device.
Tested:
Before patch:
# ip link set erspan0 mtu 1600
Error: mtu greater than device maximum.
After patch:
# ip link set erspan0 mtu 1600
# ip -d link show erspan0
21: erspan0@NONE: <BROADCAST,MULTICAST> mtu 1600 qdisc noop state DOWN
mode DEFAULT group default qlen 1000
link/ether 00:00:00:00:00:00 brd ff:ff:ff:ff:ff:ff promiscuity 0 minmtu 68 maxmtu 0
Fixes: 61e84623ace3 ("net: centralize net_device min/max MTU checking")
Signed-off-by: Haishuang Yan <yanhaishuang@cmss.chinamobile.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'net')
| -rw-r--r-- | net/ipv4/ip_gre.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/net/ipv4/ip_gre.c b/net/ipv4/ip_gre.c index a53a543fe055..52690bb3e40f 100644 --- a/net/ipv4/ip_gre.c +++ b/net/ipv4/ip_gre.c @@ -1446,6 +1446,7 @@ static void erspan_setup(struct net_device *dev) struct ip_tunnel *t = netdev_priv(dev); ether_setup(dev); + dev->max_mtu = 0; dev->netdev_ops = &erspan_netdev_ops; dev->priv_flags &= ~IFF_TX_SKB_SHARING; dev->priv_flags |= IFF_LIVE_ADDR_CHANGE; |