net: GRE: Add is_gretap_dev, is_ip6gretap_dev
authorPetr Machata <petrm@mellanox.com>
Tue, 27 Feb 2018 13:53:37 +0000 (14:53 +0100)
committerDavid S. Miller <davem@davemloft.net>
Tue, 27 Feb 2018 19:46:26 +0000 (14:46 -0500)
commitd1b2a6c4bed99fc7e8a11e7abcff19293d1974f5
treea4a2f0485cb162342716264dd064e49b3c34bbf3
parent8897207c89156a5d05dc5bf1a80dede21e768f0a
net: GRE: Add is_gretap_dev, is_ip6gretap_dev

Determining whether a device is a GRE device is easily done by
inspecting struct net_device.type. However, for the tap variants, the
type is just ARPHRD_ETHER.

Therefore introduce two predicate functions that use netdev_ops to tell
the tap devices.

Signed-off-by: Petr Machata <petrm@mellanox.com>
Reviewed-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
include/net/gre.h
net/ipv4/ip_gre.c
net/ipv6/ip6_gre.c