diff options
| author | Mohammed Gamal <mgamal@redhat.com> | 2017-10-16 15:20:32 +0200 |
|---|---|---|
| committer | Boris Ostrovsky <boris.ostrovsky@oracle.com> | 2017-10-16 16:00:44 -0400 |
| commit | e1043a4bb9fce6cfc7d55c5767e429a18ac8c4eb (patch) | |
| tree | 5dee0a6c3911c54c07de1a0842e9c284de9f345f | |
| parent | eac779aa509d453a55da0ea4302bdb79c4e0854f (diff) | |
xen-netfront, xen-netback: Use correct minimum MTU values
RFC791 specifies the minimum MTU to be 68, while xen-net{front|back}
drivers use a minimum value of 0.
When set MTU to 0~67 with xen_net{front|back} driver, the network
will become unreachable immediately, the guest can no longer be pinged.
xen_net{front|back} should not allow the user to set this value which causes
network problems.
Reported-by: Chen Shi <cheshi@redhat.com>
Signed-off-by: Mohammed Gamal <mgamal@redhat.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
| -rw-r--r-- | drivers/net/xen-netback/interface.c | 2 | ||||
| -rw-r--r-- | drivers/net/xen-netfront.c | 2 |
2 files changed, 2 insertions, 2 deletions
diff --git a/drivers/net/xen-netback/interface.c b/drivers/net/xen-netback/interface.c index ee8ed9da00ad..4491ca5aee90 100644 --- a/drivers/net/xen-netback/interface.c +++ b/drivers/net/xen-netback/interface.c @@ -486,7 +486,7 @@ struct xenvif *xenvif_alloc(struct device *parent, domid_t domid, dev->tx_queue_len = XENVIF_QUEUE_LENGTH; - dev->min_mtu = 0; + dev->min_mtu = ETH_MIN_MTU; dev->max_mtu = ETH_MAX_MTU - VLAN_ETH_HLEN; /* diff --git a/drivers/net/xen-netfront.c b/drivers/net/xen-netfront.c index 523387e71a80..8b8689c6d887 100644 --- a/drivers/net/xen-netfront.c +++ b/drivers/net/xen-netfront.c @@ -1316,7 +1316,7 @@ static struct net_device *xennet_create_dev(struct xenbus_device *dev) netdev->features |= netdev->hw_features; netdev->ethtool_ops = &xennet_ethtool_ops; - netdev->min_mtu = 0; + netdev->min_mtu = ETH_MIN_MTU; netdev->max_mtu = XEN_NETIF_MAX_TX_SIZE; SET_NETDEV_DEV(netdev, &dev->dev); |