| /* |
| * Copyright (c) 2014 Nicira, Inc. |
| * Copyright (c) 2013 Cisco Systems, Inc. |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of version 2 of the GNU General Public |
| * License as published by the Free Software Foundation. |
| * |
| * This program is distributed in the hope that it will be useful, but |
| * WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
| * 02110-1301, USA |
| */ |
| |
| #include <linux/kernel.h> |
| #include <linux/skbuff.h> |
| #include <linux/openvswitch.h> |
| #include <linux/module.h> |
| #include <net/udp.h> |
| #include <net/ip_tunnels.h> |
| #include <net/rtnetlink.h> |
| #include <net/vxlan.h> |
| |
| #include "datapath.h" |
| #include "vport.h" |
| #include "vport-netdev.h" |
| |
| static struct vport_ops ovs_vxlan_netdev_vport_ops; |
| |
| static int vxlan_get_options(const struct vport *vport, struct sk_buff *skb) |
| { |
| struct vxlan_dev *vxlan = netdev_priv(vport->dev); |
| __be16 dst_port = vxlan->cfg.dst_port; |
| |
| if (nla_put_u16(skb, OVS_TUNNEL_ATTR_DST_PORT, ntohs(dst_port))) |
| return -EMSGSIZE; |
| |
| if (vxlan->cfg.flags & VXLAN_F_GBP) { |
| struct nlattr *exts; |
| |
| exts = nla_nest_start_noflag(skb, OVS_TUNNEL_ATTR_EXTENSION); |
| if (!exts) |
| return -EMSGSIZE; |
| |
| if (vxlan->cfg.flags & VXLAN_F_GBP && |
| nla_put_flag(skb, OVS_VXLAN_EXT_GBP)) |
| return -EMSGSIZE; |
| |
| nla_nest_end(skb, exts); |
| } |
| |
| return 0; |
| } |
| |
| static const struct nla_policy exts_policy[OVS_VXLAN_EXT_MAX + 1] = { |
| [OVS_VXLAN_EXT_GBP] = { .type = NLA_FLAG, }, |
| }; |
| |
| static int vxlan_configure_exts(struct vport *vport, struct nlattr *attr, |
| struct vxlan_config *conf) |
| { |
| struct nlattr *exts[OVS_VXLAN_EXT_MAX + 1]; |
| int err; |
| |
| if (nla_len(attr) < sizeof(struct nlattr)) |
| return -EINVAL; |
| |
| err = nla_parse_nested(exts, OVS_VXLAN_EXT_MAX, attr, exts_policy, |
| NULL); |
| if (err < 0) |
| return err; |
| |
| if (exts[OVS_VXLAN_EXT_GBP]) |
| conf->flags |= VXLAN_F_GBP; |
| |
| return 0; |
| } |
| |
| static struct vport *vxlan_tnl_create(const struct vport_parms *parms) |
| { |
| struct net *net = ovs_dp_get_net(parms->dp); |
| struct nlattr *options = parms->options; |
| struct net_device *dev; |
| struct vport *vport; |
| struct nlattr *a; |
| int err; |
| struct vxlan_config conf = { |
| .no_share = true, |
| .flags = VXLAN_F_COLLECT_METADATA | VXLAN_F_UDP_ZERO_CSUM6_RX, |
| /* Don't restrict the packets that can be sent by MTU */ |
| .mtu = IP_MAX_MTU, |
| }; |
| |
| if (!options) { |
| err = -EINVAL; |
| goto error; |
| } |
| |
| a = nla_find_nested(options, OVS_TUNNEL_ATTR_DST_PORT); |
| if (a && nla_len(a) == sizeof(u16)) { |
| conf.dst_port = htons(nla_get_u16(a)); |
| } else { |
| /* Require destination port from userspace. */ |
| err = -EINVAL; |
| goto error; |
| } |
| |
| vport = ovs_vport_alloc(0, &ovs_vxlan_netdev_vport_ops, parms); |
| if (IS_ERR(vport)) |
| return vport; |
| |
| a = nla_find_nested(options, OVS_TUNNEL_ATTR_EXTENSION); |
| if (a) { |
| err = vxlan_configure_exts(vport, a, &conf); |
| if (err) { |
| ovs_vport_free(vport); |
| goto error; |
| } |
| } |
| |
| rtnl_lock(); |
| dev = vxlan_dev_create(net, parms->name, NET_NAME_USER, &conf); |
| if (IS_ERR(dev)) { |
| rtnl_unlock(); |
| ovs_vport_free(vport); |
| return ERR_CAST(dev); |
| } |
| |
| err = dev_change_flags(dev, dev->flags | IFF_UP, NULL); |
| if (err < 0) { |
| rtnl_delete_link(dev); |
| rtnl_unlock(); |
| ovs_vport_free(vport); |
| goto error; |
| } |
| |
| rtnl_unlock(); |
| return vport; |
| error: |
| return ERR_PTR(err); |
| } |
| |
| static struct vport *vxlan_create(const struct vport_parms *parms) |
| { |
| struct vport *vport; |
| |
| vport = vxlan_tnl_create(parms); |
| if (IS_ERR(vport)) |
| return vport; |
| |
| return ovs_netdev_link(vport, parms->name); |
| } |
| |
| static struct vport_ops ovs_vxlan_netdev_vport_ops = { |
| .type = OVS_VPORT_TYPE_VXLAN, |
| .create = vxlan_create, |
| .destroy = ovs_netdev_tunnel_destroy, |
| .get_options = vxlan_get_options, |
| .send = dev_queue_xmit, |
| }; |
| |
| static int __init ovs_vxlan_tnl_init(void) |
| { |
| return ovs_vport_ops_register(&ovs_vxlan_netdev_vport_ops); |
| } |
| |
| static void __exit ovs_vxlan_tnl_exit(void) |
| { |
| ovs_vport_ops_unregister(&ovs_vxlan_netdev_vport_ops); |
| } |
| |
| module_init(ovs_vxlan_tnl_init); |
| module_exit(ovs_vxlan_tnl_exit); |
| |
| MODULE_DESCRIPTION("OVS: VXLAN switching port"); |
| MODULE_LICENSE("GPL"); |
| MODULE_ALIAS("vport-type-4"); |