170 строки
3.7 KiB
C
170 строки
3.7 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright (c) 2014 Nicira, Inc.
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* Copyright (c) 2013 Cisco Systems, Inc.
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*/
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#include <linux/kernel.h>
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#include <linux/skbuff.h>
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#include <linux/openvswitch.h>
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#include <linux/module.h>
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#include <net/udp.h>
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#include <net/ip_tunnels.h>
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#include <net/rtnetlink.h>
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#include <net/vxlan.h>
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#include "datapath.h"
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#include "vport.h"
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#include "vport-netdev.h"
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static struct vport_ops ovs_vxlan_netdev_vport_ops;
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static int vxlan_get_options(const struct vport *vport, struct sk_buff *skb)
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{
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struct vxlan_dev *vxlan = netdev_priv(vport->dev);
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__be16 dst_port = vxlan->cfg.dst_port;
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if (nla_put_u16(skb, OVS_TUNNEL_ATTR_DST_PORT, ntohs(dst_port)))
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return -EMSGSIZE;
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if (vxlan->cfg.flags & VXLAN_F_GBP) {
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struct nlattr *exts;
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exts = nla_nest_start_noflag(skb, OVS_TUNNEL_ATTR_EXTENSION);
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if (!exts)
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return -EMSGSIZE;
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if (vxlan->cfg.flags & VXLAN_F_GBP &&
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nla_put_flag(skb, OVS_VXLAN_EXT_GBP))
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return -EMSGSIZE;
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nla_nest_end(skb, exts);
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}
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return 0;
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}
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static const struct nla_policy exts_policy[OVS_VXLAN_EXT_MAX + 1] = {
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[OVS_VXLAN_EXT_GBP] = { .type = NLA_FLAG, },
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};
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static int vxlan_configure_exts(struct vport *vport, struct nlattr *attr,
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struct vxlan_config *conf)
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{
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struct nlattr *exts[OVS_VXLAN_EXT_MAX + 1];
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int err;
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if (nla_len(attr) < sizeof(struct nlattr))
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return -EINVAL;
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err = nla_parse_nested_deprecated(exts, OVS_VXLAN_EXT_MAX, attr,
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exts_policy, NULL);
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if (err < 0)
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return err;
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if (exts[OVS_VXLAN_EXT_GBP])
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conf->flags |= VXLAN_F_GBP;
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return 0;
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}
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static struct vport *vxlan_tnl_create(const struct vport_parms *parms)
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{
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struct net *net = ovs_dp_get_net(parms->dp);
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struct nlattr *options = parms->options;
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struct net_device *dev;
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struct vport *vport;
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struct nlattr *a;
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int err;
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struct vxlan_config conf = {
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.no_share = true,
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.flags = VXLAN_F_COLLECT_METADATA | VXLAN_F_UDP_ZERO_CSUM6_RX,
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/* Don't restrict the packets that can be sent by MTU */
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.mtu = IP_MAX_MTU,
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};
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if (!options) {
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err = -EINVAL;
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goto error;
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}
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a = nla_find_nested(options, OVS_TUNNEL_ATTR_DST_PORT);
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if (a && nla_len(a) == sizeof(u16)) {
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conf.dst_port = htons(nla_get_u16(a));
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} else {
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/* Require destination port from userspace. */
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err = -EINVAL;
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goto error;
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}
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vport = ovs_vport_alloc(0, &ovs_vxlan_netdev_vport_ops, parms);
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if (IS_ERR(vport))
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return vport;
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a = nla_find_nested(options, OVS_TUNNEL_ATTR_EXTENSION);
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if (a) {
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err = vxlan_configure_exts(vport, a, &conf);
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if (err) {
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ovs_vport_free(vport);
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goto error;
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}
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}
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rtnl_lock();
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dev = vxlan_dev_create(net, parms->name, NET_NAME_USER, &conf);
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if (IS_ERR(dev)) {
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rtnl_unlock();
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ovs_vport_free(vport);
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return ERR_CAST(dev);
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}
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err = dev_change_flags(dev, dev->flags | IFF_UP, NULL);
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if (err < 0) {
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rtnl_delete_link(dev, 0, NULL);
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rtnl_unlock();
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ovs_vport_free(vport);
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goto error;
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}
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rtnl_unlock();
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return vport;
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error:
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return ERR_PTR(err);
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}
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static struct vport *vxlan_create(const struct vport_parms *parms)
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{
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struct vport *vport;
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vport = vxlan_tnl_create(parms);
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if (IS_ERR(vport))
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return vport;
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return ovs_netdev_link(vport, parms->name);
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}
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static struct vport_ops ovs_vxlan_netdev_vport_ops = {
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.type = OVS_VPORT_TYPE_VXLAN,
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.create = vxlan_create,
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.destroy = ovs_netdev_tunnel_destroy,
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.get_options = vxlan_get_options,
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.send = dev_queue_xmit,
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};
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static int __init ovs_vxlan_tnl_init(void)
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{
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return ovs_vport_ops_register(&ovs_vxlan_netdev_vport_ops);
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}
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static void __exit ovs_vxlan_tnl_exit(void)
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{
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ovs_vport_ops_unregister(&ovs_vxlan_netdev_vport_ops);
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}
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module_init(ovs_vxlan_tnl_init);
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module_exit(ovs_vxlan_tnl_exit);
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MODULE_DESCRIPTION("OVS: VXLAN switching port");
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MODULE_LICENSE("GPL");
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MODULE_ALIAS("vport-type-4");
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