macvlan: better mode validation
authorMichael S. Tsirkin <mst@redhat.com>
Thu, 1 Aug 2013 10:43:19 +0000 (13:43 +0300)
committerDavid S. Miller <davem@davemloft.net>
Thu, 1 Aug 2013 23:32:05 +0000 (16:32 -0700)
commit266e83474c98e9f18d31f4837cfe05819a660d32
treeee1ee950654dcb6eab2f2d3f78f03db4a29e3ae1
parentc756891a4e1c08c43780e17aca1d2b849ef31d1a
macvlan: better mode validation

macvlan passthrough mode is special: it's not possible to switch to or
from it through a netlink command.

But if you try, the command will succeed, which is
confusing.

Validate input and return error to user.

Cc: Sridhar Samudrala <sri@us.ibm.com>
Cc: "David S. Miller" <davem@davemloft.net>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
drivers/net/macvlan.c