diff options
| author |   Mahesh Bandewar <maheshb@google.com> | 2014-12-06 15:53:19 -0800 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2014-12-09 16:10:06 -0500 |
| commit | 764e433b3c43d47e2d19e4bd32fec093421b9cff (patch) | |
| tree | dac83cf25f3b5407ec27ca7d73210f2ef49a2584 /drivers | |
| parent | netdevice: Add a function to check macvlan port (diff) | |
| download | linux-dev-764e433b3c43d47e2d19e4bd32fec093421b9cff.tar.xz linux-dev-764e433b3c43d47e2d19e4bd32fec093421b9cff.zip | |
ipvlan: play well with macvlan device
If a device is already a macvlan port then refuse to use it as
an ipvlan port in the early stage of port creation.
thost1:~# ip link add link eth0 mvl0 type macvlan
thost1:~# echo $?
0
thost1:~# ip link add link eth0 ipvl0 type ipvlan
RTNETLINK answers: Device or resource busy
thost1:~# echo $?
2
thost1:~#
Signed-off-by: Mahesh Bandewar <maheshb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/ipvlan/ipvlan_main.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/net/ipvlan/ipvlan_main.c b/drivers/net/ipvlan/ipvlan_main.c index feb185389a87..a66ff8197008 100644 --- a/drivers/net/ipvlan/ipvlan_main.c +++ b/drivers/net/ipvlan/ipvlan_main.c @@ -38,6 +38,12 @@ static int ipvlan_port_create(struct net_device *dev) netdev_err(dev, "Master is either lo or non-ether device\n"); return -EINVAL; } + + if (netif_is_macvlan_port(dev)) { + netdev_err(dev, "Master is a macvlan port.\n"); + return -EBUSY; + } + port = kzalloc(sizeof(struct ipvl_port), GFP_KERNEL); if (!port) return -ENOMEM; |