[PATCH RFC 4/7] net: GRE/GUE TX support
From: Tom Herbert <hidden>
Date: 2014-01-02 22:18:40
Subsystem:
networking [general], networking [ipv4/ipv6], the rest · Maintainers:
"David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, David Ahern, Ido Schimmel, Linus Torvalds
Add support to perform GRE over GUE encapsulation. Signed-off-by: Tom Herbert <redacted> --- net/ipv4/ip_gre.c | 13 ++++++++++--- 1 file changed, 10 insertions(+), 3 deletions(-)
diff --git a/net/ipv4/ip_gre.c b/net/ipv4/ip_gre.c
index d7aea4c..e559e90 100644
--- a/net/ipv4/ip_gre.c
+++ b/net/ipv4/ip_gre.c@@ -238,7 +238,7 @@ static void __gre_xmit(struct sk_buff *skb, struct net_device *dev, tpi.seq = htonl(tunnel->o_seqno); /* Push GRE header. */ - gre_build_header(skb, &tpi, tunnel->hlen); + gre_build_header(skb, &tpi, tunnel->tun_hlen); ip_tunnel_xmit(skb, dev, tnl_params, tnl_params->protocol); }
@@ -309,9 +309,14 @@ out: static int ipgre_tunnel_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) { - int err = 0; + int err; struct ip_tunnel_parm p; + /* Try generic tunnel ioctls first */ + err = ip_tunnel_gen_ioctl(dev, ifr, cmd); + if (err != -ENOIOCTLCMD) + return err; + if (copy_from_user(&p, ifr->ifr_ifru.ifru_data, sizeof(p))) return -EFAULT; if (cmd == SIOCADDTUNNEL || cmd == SIOCCHGTUNNEL) {
@@ -470,9 +475,11 @@ static void __gre_tunnel_init(struct net_device *dev) struct ip_tunnel *tunnel; tunnel = netdev_priv(dev); - tunnel->hlen = ip_gre_calc_hlen(tunnel->parms.o_flags); + tunnel->tun_hlen = ip_gre_calc_hlen(tunnel->parms.o_flags); tunnel->parms.iph.protocol = IPPROTO_GRE; + tunnel->hlen = tunnel->tun_hlen + tunnel->encap_hlen; + dev->needed_headroom = LL_MAX_HEADER + sizeof(struct iphdr) + 4; dev->mtu = ETH_DATA_LEN - sizeof(struct iphdr) - 4;
--
1.8.5.1