Mark McLoughlin e3b9955697
tun: TUNGETIFF interface to query name and flags ...
Add a TUNGETIFF interface so that userspace can query a
tun/tap descriptor for its name and flags.
This is needed because it is common for one app to create
a tap interface, exec another app and pass it the file
descriptor for the interface. Without TUNGETIFF the spawned
app has no way of detecting wheter the interface has e.g.
IFF_VNET_HDR set.
Signed-off-by: Mark McLoughlin <markmc@redhat.com >
Acked-by: Max Krasnyansky <maxk@qualcomm.com >
Signed-off-by: David S. Miller <davem@davemloft.net >
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Mark McLoughlin
e3b9955697