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169 lines
3.7 KiB
169 lines
3.7 KiB
// 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); |
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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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