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| author | Petr Machata <petrm@mellanox.com> | 2018-02-27 14:53:37 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2018-02-27 14:46:26 -0500 |
| commit | d1b2a6c4bed99fc7e8a11e7abcff19293d1974f5 (patch) | |
| tree | a4a2f0485cb162342716264dd064e49b3c34bbf3 | |
| parent | 8897207c89156a5d05dc5bf1a80dede21e768f0a (diff) | |
| download | linux-d1b2a6c4bed99fc7e8a11e7abcff19293d1974f5.tar.bz2 | |
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>
| -rw-r--r-- | include/net/gre.h | 3 | ||||
| -rw-r--r-- | net/ipv4/ip_gre.c | 6 | ||||
| -rw-r--r-- | net/ipv6/ip6_gre.c | 6 |
3 files changed, 15 insertions, 0 deletions
diff --git a/include/net/gre.h b/include/net/gre.h index f90585decbce..797142eee9cd 100644 --- a/include/net/gre.h +++ b/include/net/gre.h @@ -37,6 +37,9 @@ struct net_device *gretap_fb_dev_create(struct net *net, const char *name, int gre_parse_header(struct sk_buff *skb, struct tnl_ptk_info *tpi, bool *csum_err, __be16 proto, int nhs); +bool is_gretap_dev(const struct net_device *dev); +bool is_ip6gretap_dev(const struct net_device *dev); + static inline int gre_calc_hlen(__be16 o_flags) { int addend = 4; diff --git a/net/ipv4/ip_gre.c b/net/ipv4/ip_gre.c index e496afa47709..0fe1d69b5df4 100644 --- a/net/ipv4/ip_gre.c +++ b/net/ipv4/ip_gre.c @@ -1323,6 +1323,12 @@ static void ipgre_tap_setup(struct net_device *dev) ip_tunnel_setup(dev, gre_tap_net_id); } +bool is_gretap_dev(const struct net_device *dev) +{ + return dev->netdev_ops == &gre_tap_netdev_ops; +} +EXPORT_SYMBOL_GPL(is_gretap_dev); + static int ipgre_newlink(struct net *src_net, struct net_device *dev, struct nlattr *tb[], struct nlattr *data[], struct netlink_ext_ack *extack) diff --git a/net/ipv6/ip6_gre.c b/net/ipv6/ip6_gre.c index 3026662a6413..4f150a394387 100644 --- a/net/ipv6/ip6_gre.c +++ b/net/ipv6/ip6_gre.c @@ -1785,6 +1785,12 @@ static void ip6gre_tap_setup(struct net_device *dev) netif_keep_dst(dev); } +bool is_ip6gretap_dev(const struct net_device *dev) +{ + return dev->netdev_ops == &ip6gre_tap_netdev_ops; +} +EXPORT_SYMBOL_GPL(is_ip6gretap_dev); + static bool ip6gre_netlink_encap_parms(struct nlattr *data[], struct ip_tunnel_encap *ipencap) { |