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| 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 /drivers/net/xen-netback | |
| parent | xen/vcpu: Use a unified name about cpu hotplug state for pv and pvhvm (diff) | |
| download | linux-dev-e1043a4bb9fce6cfc7d55c5767e429a18ac8c4eb.tar.xz linux-dev-e1043a4bb9fce6cfc7d55c5767e429a18ac8c4eb.zip | |
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>
Diffstat (limited to 'drivers/net/xen-netback')
| -rw-r--r-- | drivers/net/xen-netback/interface.c | 2 |
1 files changed, 1 insertions, 1 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; /* |