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https://github.com/openvswitch/ovs
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VXLAN was recently assigned UDP port 4789 by IANA. This comit updates the OVS VXLAN implementation to reflect the new UDP port number. Cc: Kenneth Duda <kduda@aristanetworks.com> Signed-off-by: Kyle Mestery <kmestery@cisco.com> Signed-off-by: Jesse Gross <jesse@nicira.com>
717 lines
22 KiB
C
717 lines
22 KiB
C
/*
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* Copyright (c) 2010, 2011, 2012, 2013 Nicira, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <config.h>
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#include "netdev-vport.h"
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#include <errno.h>
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#include <fcntl.h>
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#include <sys/socket.h>
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#include <net/if.h>
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#include <sys/ioctl.h>
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#include "byte-order.h"
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#include "daemon.h"
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#include "dirs.h"
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#include "dpif.h"
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#include "hash.h"
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#include "hmap.h"
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#include "list.h"
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#include "netdev-provider.h"
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#include "ofpbuf.h"
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#include "packets.h"
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#include "route-table.h"
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#include "shash.h"
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#include "socket-util.h"
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#include "vlog.h"
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VLOG_DEFINE_THIS_MODULE(netdev_vport);
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/* Default to the OTV port, per the VXLAN IETF draft. */
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#define VXLAN_DST_PORT 4789
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#define LISP_DST_PORT 4341
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#define DEFAULT_TTL 64
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struct netdev_dev_vport {
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struct netdev_dev netdev_dev;
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unsigned int change_seq;
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uint8_t etheraddr[ETH_ADDR_LEN];
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struct netdev_stats stats;
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/* Tunnels. */
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struct netdev_tunnel_config tnl_cfg;
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/* Patch Ports. */
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char *peer;
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};
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struct vport_class {
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const char *dpif_port;
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struct netdev_class netdev_class;
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};
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static int netdev_vport_create(const struct netdev_class *, const char *,
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struct netdev_dev **);
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static int get_patch_config(struct netdev_dev *, struct smap *args);
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static int get_tunnel_config(struct netdev_dev *, struct smap *args);
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static void netdev_vport_poll_notify(struct netdev_dev_vport *);
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static bool
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is_vport_class(const struct netdev_class *class)
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{
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return class->create == netdev_vport_create;
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}
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static const struct vport_class *
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vport_class_cast(const struct netdev_class *class)
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{
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ovs_assert(is_vport_class(class));
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return CONTAINER_OF(class, struct vport_class, netdev_class);
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}
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static struct netdev_dev_vport *
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netdev_dev_vport_cast(const struct netdev_dev *netdev_dev)
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{
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ovs_assert(is_vport_class(netdev_dev_get_class(netdev_dev)));
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return CONTAINER_OF(netdev_dev, struct netdev_dev_vport, netdev_dev);
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}
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static struct netdev_dev_vport *
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netdev_vport_get_dev(const struct netdev *netdev)
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{
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return netdev_dev_vport_cast(netdev_get_dev(netdev));
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}
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static const struct netdev_tunnel_config *
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get_netdev_tunnel_config(const struct netdev_dev *netdev_dev)
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{
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return &netdev_dev_vport_cast(netdev_dev)->tnl_cfg;
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}
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bool
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netdev_vport_is_patch(const struct netdev *netdev)
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{
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const struct netdev_dev *dev = netdev_get_dev(netdev);
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const struct netdev_class *class = netdev_dev_get_class(dev);
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return class->get_config == get_patch_config;
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}
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static bool
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netdev_vport_needs_dst_port(const struct netdev_dev *dev)
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{
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const struct netdev_class *class = netdev_dev_get_class(dev);
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const char *type = netdev_dev_get_type(dev);
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return (class->get_config == get_tunnel_config &&
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(!strcmp("vxlan", type) || !strcmp("lisp", type)));
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}
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const char *
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netdev_vport_get_dpif_port(const struct netdev *netdev)
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{
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const struct netdev_dev *dev = netdev_get_dev(netdev);
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const struct netdev_class *class = netdev_dev_get_class(dev);
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const char *dpif_port;
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if (netdev_vport_needs_dst_port(dev)) {
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const struct netdev_dev_vport *vport = netdev_vport_get_dev(netdev);
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const char *type = netdev_dev_get_type(dev);
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static char dpif_port_combined[IFNAMSIZ];
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/*
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* Note: IFNAMSIZ is 16 bytes long. The maximum length of a VXLAN
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* or LISP port name below is 15 or 14 bytes respectively. Still,
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* assert here on the size of strlen(type) in case that changes
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* in the future.
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*/
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ovs_assert(strlen(type) + 10 < IFNAMSIZ);
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snprintf(dpif_port_combined, IFNAMSIZ, "%s_sys_%d", type,
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ntohs(vport->tnl_cfg.dst_port));
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return dpif_port_combined;
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} else {
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dpif_port = (is_vport_class(class)
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? vport_class_cast(class)->dpif_port
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: NULL);
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}
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return dpif_port ? dpif_port : netdev_get_name(netdev);
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}
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static int
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netdev_vport_create(const struct netdev_class *netdev_class, const char *name,
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struct netdev_dev **netdev_devp)
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{
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struct netdev_dev_vport *dev;
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dev = xzalloc(sizeof *dev);
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netdev_dev_init(&dev->netdev_dev, name, netdev_class);
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dev->change_seq = 1;
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eth_addr_random(dev->etheraddr);
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*netdev_devp = &dev->netdev_dev;
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route_table_register();
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return 0;
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}
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static void
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netdev_vport_destroy(struct netdev_dev *netdev_dev_)
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{
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struct netdev_dev_vport *netdev_dev = netdev_dev_vport_cast(netdev_dev_);
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route_table_unregister();
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free(netdev_dev->peer);
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free(netdev_dev);
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}
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static int
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netdev_vport_open(struct netdev_dev *netdev_dev, struct netdev **netdevp)
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{
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*netdevp = xmalloc(sizeof **netdevp);
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netdev_init(*netdevp, netdev_dev);
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return 0;
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}
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static void
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netdev_vport_close(struct netdev *netdev)
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{
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free(netdev);
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}
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static int
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netdev_vport_set_etheraddr(struct netdev *netdev,
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const uint8_t mac[ETH_ADDR_LEN])
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{
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struct netdev_dev_vport *dev = netdev_vport_get_dev(netdev);
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memcpy(dev->etheraddr, mac, ETH_ADDR_LEN);
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netdev_vport_poll_notify(dev);
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return 0;
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}
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static int
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netdev_vport_get_etheraddr(const struct netdev *netdev,
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uint8_t mac[ETH_ADDR_LEN])
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{
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memcpy(mac, netdev_vport_get_dev(netdev)->etheraddr, ETH_ADDR_LEN);
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return 0;
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}
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static int
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tunnel_get_status(const struct netdev *netdev, struct smap *smap)
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{
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static char iface[IFNAMSIZ];
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ovs_be32 route;
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route = netdev_vport_get_dev(netdev)->tnl_cfg.ip_dst;
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if (route_table_get_name(route, iface)) {
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struct netdev *egress_netdev;
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smap_add(smap, "tunnel_egress_iface", iface);
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if (!netdev_open(iface, "system", &egress_netdev)) {
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smap_add(smap, "tunnel_egress_iface_carrier",
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netdev_get_carrier(egress_netdev) ? "up" : "down");
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netdev_close(egress_netdev);
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}
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}
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return 0;
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}
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static int
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netdev_vport_update_flags(struct netdev *netdev OVS_UNUSED,
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enum netdev_flags off, enum netdev_flags on OVS_UNUSED,
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enum netdev_flags *old_flagsp)
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{
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if (off & (NETDEV_UP | NETDEV_PROMISC)) {
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return EOPNOTSUPP;
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}
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*old_flagsp = NETDEV_UP | NETDEV_PROMISC;
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return 0;
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}
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static unsigned int
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netdev_vport_change_seq(const struct netdev *netdev)
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{
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return netdev_vport_get_dev(netdev)->change_seq;
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}
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static void
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netdev_vport_run(void)
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{
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route_table_run();
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}
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static void
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netdev_vport_wait(void)
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{
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route_table_wait();
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}
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/* Helper functions. */
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static void
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netdev_vport_poll_notify(struct netdev_dev_vport *ndv)
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{
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ndv->change_seq++;
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if (!ndv->change_seq) {
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ndv->change_seq++;
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}
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}
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/* Code specific to tunnel types. */
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static ovs_be64
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parse_key(const struct smap *args, const char *name,
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bool *present, bool *flow)
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{
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const char *s;
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*present = false;
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*flow = false;
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s = smap_get(args, name);
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if (!s) {
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s = smap_get(args, "key");
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if (!s) {
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return 0;
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}
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}
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*present = true;
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if (!strcmp(s, "flow")) {
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*flow = true;
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return 0;
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} else {
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return htonll(strtoull(s, NULL, 0));
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}
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}
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static int
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set_tunnel_config(struct netdev_dev *dev_, const struct smap *args)
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{
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struct netdev_dev_vport *dev = netdev_dev_vport_cast(dev_);
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const char *name = netdev_dev_get_name(dev_);
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const char *type = netdev_dev_get_type(dev_);
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bool ipsec_mech_set, needs_dst_port, has_csum;
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struct netdev_tunnel_config tnl_cfg;
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struct smap_node *node;
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has_csum = strstr(type, "gre");
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ipsec_mech_set = false;
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memset(&tnl_cfg, 0, sizeof tnl_cfg);
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needs_dst_port = netdev_vport_needs_dst_port(dev_);
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tnl_cfg.ipsec = strstr(type, "ipsec");
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tnl_cfg.dont_fragment = true;
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SMAP_FOR_EACH (node, args) {
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if (!strcmp(node->key, "remote_ip")) {
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struct in_addr in_addr;
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if (lookup_ip(node->value, &in_addr)) {
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VLOG_WARN("%s: bad %s 'remote_ip'", name, type);
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} else if (ip_is_multicast(in_addr.s_addr)) {
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VLOG_WARN("%s: multicast remote_ip="IP_FMT" not allowed",
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name, IP_ARGS(in_addr.s_addr));
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return EINVAL;
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} else {
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tnl_cfg.ip_dst = in_addr.s_addr;
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}
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} else if (!strcmp(node->key, "local_ip")) {
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struct in_addr in_addr;
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if (lookup_ip(node->value, &in_addr)) {
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VLOG_WARN("%s: bad %s 'local_ip'", name, type);
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} else {
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tnl_cfg.ip_src = in_addr.s_addr;
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}
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} else if (!strcmp(node->key, "tos")) {
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if (!strcmp(node->value, "inherit")) {
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tnl_cfg.tos_inherit = true;
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} else {
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char *endptr;
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int tos;
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tos = strtol(node->value, &endptr, 0);
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if (*endptr == '\0' && tos == (tos & IP_DSCP_MASK)) {
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tnl_cfg.tos = tos;
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} else {
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VLOG_WARN("%s: invalid TOS %s", name, node->value);
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}
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}
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} else if (!strcmp(node->key, "ttl")) {
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if (!strcmp(node->value, "inherit")) {
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tnl_cfg.ttl_inherit = true;
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} else {
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tnl_cfg.ttl = atoi(node->value);
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}
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} else if (!strcmp(node->key, "dst_port") && needs_dst_port) {
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tnl_cfg.dst_port = htons(atoi(node->value));
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} else if (!strcmp(node->key, "csum") && has_csum) {
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if (!strcmp(node->value, "true")) {
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tnl_cfg.csum = true;
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}
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} else if (!strcmp(node->key, "df_default")) {
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if (!strcmp(node->value, "false")) {
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tnl_cfg.dont_fragment = false;
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}
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} else if (!strcmp(node->key, "peer_cert") && tnl_cfg.ipsec) {
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if (smap_get(args, "certificate")) {
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ipsec_mech_set = true;
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} else {
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const char *use_ssl_cert;
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/* If the "use_ssl_cert" is true, then "certificate" and
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* "private_key" will be pulled from the SSL table. The
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* use of this option is strongly discouraged, since it
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* will like be removed when multiple SSL configurations
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* are supported by OVS.
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*/
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use_ssl_cert = smap_get(args, "use_ssl_cert");
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if (!use_ssl_cert || strcmp(use_ssl_cert, "true")) {
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VLOG_ERR("%s: 'peer_cert' requires 'certificate' argument",
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name);
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return EINVAL;
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}
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ipsec_mech_set = true;
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}
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} else if (!strcmp(node->key, "psk") && tnl_cfg.ipsec) {
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ipsec_mech_set = true;
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} else if (tnl_cfg.ipsec
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&& (!strcmp(node->key, "certificate")
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|| !strcmp(node->key, "private_key")
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|| !strcmp(node->key, "use_ssl_cert"))) {
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/* Ignore options not used by the netdev. */
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} else if (!strcmp(node->key, "key") ||
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!strcmp(node->key, "in_key") ||
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!strcmp(node->key, "out_key")) {
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/* Handled separately below. */
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} else {
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VLOG_WARN("%s: unknown %s argument '%s'", name, type, node->key);
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}
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}
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/* Add a default destination port for VXLAN if none specified. */
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if (!strcmp(type, "vxlan") && !tnl_cfg.dst_port) {
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tnl_cfg.dst_port = htons(VXLAN_DST_PORT);
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}
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/* Add a default destination port for LISP if none specified. */
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if (!strcmp(type, "lisp") && !tnl_cfg.dst_port) {
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tnl_cfg.dst_port = htons(LISP_DST_PORT);
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}
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if (tnl_cfg.ipsec) {
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static pid_t pid = 0;
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if (pid <= 0) {
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char *file_name = xasprintf("%s/%s", ovs_rundir(),
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"ovs-monitor-ipsec.pid");
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pid = read_pidfile(file_name);
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free(file_name);
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}
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if (pid < 0) {
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VLOG_ERR("%s: IPsec requires the ovs-monitor-ipsec daemon",
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name);
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return EINVAL;
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}
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if (smap_get(args, "peer_cert") && smap_get(args, "psk")) {
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VLOG_ERR("%s: cannot define both 'peer_cert' and 'psk'", name);
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return EINVAL;
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}
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if (!ipsec_mech_set) {
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VLOG_ERR("%s: IPsec requires an 'peer_cert' or psk' argument",
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name);
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return EINVAL;
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}
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}
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if (!tnl_cfg.ip_dst) {
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VLOG_ERR("%s: %s type requires valid 'remote_ip' argument",
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name, type);
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return EINVAL;
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}
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if (!tnl_cfg.ttl) {
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tnl_cfg.ttl = DEFAULT_TTL;
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}
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tnl_cfg.in_key = parse_key(args, "in_key",
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&tnl_cfg.in_key_present,
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&tnl_cfg.in_key_flow);
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tnl_cfg.out_key = parse_key(args, "out_key",
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&tnl_cfg.out_key_present,
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&tnl_cfg.out_key_flow);
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dev->tnl_cfg = tnl_cfg;
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netdev_vport_poll_notify(dev);
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return 0;
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}
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static int
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get_tunnel_config(struct netdev_dev *dev, struct smap *args)
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{
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const struct netdev_tunnel_config *tnl_cfg =
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&netdev_dev_vport_cast(dev)->tnl_cfg;
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if (tnl_cfg->ip_dst) {
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smap_add_format(args, "remote_ip", IP_FMT, IP_ARGS(tnl_cfg->ip_dst));
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}
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if (tnl_cfg->ip_src) {
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smap_add_format(args, "local_ip", IP_FMT, IP_ARGS(tnl_cfg->ip_src));
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}
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if (tnl_cfg->in_key_flow && tnl_cfg->out_key_flow) {
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smap_add(args, "key", "flow");
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} else if (tnl_cfg->in_key_present && tnl_cfg->out_key_present
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&& tnl_cfg->in_key == tnl_cfg->out_key) {
|
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smap_add_format(args, "key", "%"PRIu64, ntohll(tnl_cfg->in_key));
|
||
} else {
|
||
if (tnl_cfg->in_key_flow) {
|
||
smap_add(args, "in_key", "flow");
|
||
} else if (tnl_cfg->in_key_present) {
|
||
smap_add_format(args, "in_key", "%"PRIu64,
|
||
ntohll(tnl_cfg->in_key));
|
||
}
|
||
|
||
if (tnl_cfg->out_key_flow) {
|
||
smap_add(args, "out_key", "flow");
|
||
} else if (tnl_cfg->out_key_present) {
|
||
smap_add_format(args, "out_key", "%"PRIu64,
|
||
ntohll(tnl_cfg->out_key));
|
||
}
|
||
}
|
||
|
||
if (tnl_cfg->ttl_inherit) {
|
||
smap_add(args, "ttl", "inherit");
|
||
} else if (tnl_cfg->ttl != DEFAULT_TTL) {
|
||
smap_add_format(args, "ttl", "%"PRIu8, tnl_cfg->ttl);
|
||
}
|
||
|
||
if (tnl_cfg->tos_inherit) {
|
||
smap_add(args, "tos", "inherit");
|
||
} else if (tnl_cfg->tos) {
|
||
smap_add_format(args, "tos", "0x%x", tnl_cfg->tos);
|
||
}
|
||
|
||
if (tnl_cfg->dst_port) {
|
||
uint16_t dst_port = ntohs(tnl_cfg->dst_port);
|
||
const char *type = netdev_dev_get_type(dev);
|
||
|
||
if ((!strcmp("vxlan", type) && dst_port != VXLAN_DST_PORT) ||
|
||
(!strcmp("lisp", type) && dst_port != LISP_DST_PORT)) {
|
||
smap_add_format(args, "dst_port", "%d", dst_port);
|
||
}
|
||
}
|
||
|
||
if (tnl_cfg->csum) {
|
||
smap_add(args, "csum", "true");
|
||
}
|
||
|
||
if (!tnl_cfg->dont_fragment) {
|
||
smap_add(args, "df_default", "false");
|
||
}
|
||
|
||
return 0;
|
||
}
|
||
|
||
/* Code specific to patch ports. */
|
||
|
||
const char *
|
||
netdev_vport_patch_peer(const struct netdev *netdev)
|
||
{
|
||
return netdev_vport_is_patch(netdev)
|
||
? netdev_vport_get_dev(netdev)->peer
|
||
: NULL;
|
||
}
|
||
|
||
void
|
||
netdev_vport_inc_rx(const struct netdev *netdev,
|
||
const struct dpif_flow_stats *stats)
|
||
{
|
||
if (is_vport_class(netdev_dev_get_class(netdev_get_dev(netdev)))) {
|
||
struct netdev_dev_vport *dev = netdev_vport_get_dev(netdev);
|
||
dev->stats.rx_packets += stats->n_packets;
|
||
dev->stats.rx_bytes += stats->n_bytes;
|
||
}
|
||
}
|
||
|
||
void
|
||
netdev_vport_inc_tx(const struct netdev *netdev,
|
||
const struct dpif_flow_stats *stats)
|
||
{
|
||
if (is_vport_class(netdev_dev_get_class(netdev_get_dev(netdev)))) {
|
||
struct netdev_dev_vport *dev = netdev_vport_get_dev(netdev);
|
||
dev->stats.tx_packets += stats->n_packets;
|
||
dev->stats.tx_bytes += stats->n_bytes;
|
||
}
|
||
}
|
||
|
||
static int
|
||
get_patch_config(struct netdev_dev *dev_, struct smap *args)
|
||
{
|
||
struct netdev_dev_vport *dev = netdev_dev_vport_cast(dev_);
|
||
|
||
if (dev->peer) {
|
||
smap_add(args, "peer", dev->peer);
|
||
}
|
||
return 0;
|
||
}
|
||
|
||
static int
|
||
set_patch_config(struct netdev_dev *dev_, const struct smap *args)
|
||
{
|
||
struct netdev_dev_vport *dev = netdev_dev_vport_cast(dev_);
|
||
const char *name = netdev_dev_get_name(dev_);
|
||
const char *peer;
|
||
|
||
peer = smap_get(args, "peer");
|
||
if (!peer) {
|
||
VLOG_ERR("%s: patch type requires valid 'peer' argument", name);
|
||
return EINVAL;
|
||
}
|
||
|
||
if (smap_count(args) > 1) {
|
||
VLOG_ERR("%s: patch type takes only a 'peer' argument", name);
|
||
return EINVAL;
|
||
}
|
||
|
||
if (!strcmp(name, peer)) {
|
||
VLOG_ERR("%s: patch peer must not be self", name);
|
||
return EINVAL;
|
||
}
|
||
|
||
free(dev->peer);
|
||
dev->peer = xstrdup(peer);
|
||
|
||
return 0;
|
||
}
|
||
|
||
static int
|
||
get_stats(const struct netdev *netdev, struct netdev_stats *stats)
|
||
{
|
||
struct netdev_dev_vport *dev = netdev_vport_get_dev(netdev);
|
||
memcpy(stats, &dev->stats, sizeof *stats);
|
||
return 0;
|
||
}
|
||
|
||
#define VPORT_FUNCTIONS(GET_CONFIG, SET_CONFIG, \
|
||
GET_TUNNEL_CONFIG, GET_STATUS) \
|
||
NULL, \
|
||
netdev_vport_run, \
|
||
netdev_vport_wait, \
|
||
\
|
||
netdev_vport_create, \
|
||
netdev_vport_destroy, \
|
||
GET_CONFIG, \
|
||
SET_CONFIG, \
|
||
GET_TUNNEL_CONFIG, \
|
||
\
|
||
netdev_vport_open, \
|
||
netdev_vport_close, \
|
||
\
|
||
NULL, /* listen */ \
|
||
NULL, /* recv */ \
|
||
NULL, /* recv_wait */ \
|
||
NULL, /* drain */ \
|
||
\
|
||
NULL, /* send */ \
|
||
NULL, /* send_wait */ \
|
||
\
|
||
netdev_vport_set_etheraddr, \
|
||
netdev_vport_get_etheraddr, \
|
||
NULL, /* get_mtu */ \
|
||
NULL, /* set_mtu */ \
|
||
NULL, /* get_ifindex */ \
|
||
NULL, /* get_carrier */ \
|
||
NULL, /* get_carrier_resets */ \
|
||
NULL, /* get_miimon */ \
|
||
get_stats, \
|
||
NULL, /* set_stats */ \
|
||
\
|
||
NULL, /* get_features */ \
|
||
NULL, /* set_advertisements */ \
|
||
\
|
||
NULL, /* set_policing */ \
|
||
NULL, /* get_qos_types */ \
|
||
NULL, /* get_qos_capabilities */ \
|
||
NULL, /* get_qos */ \
|
||
NULL, /* set_qos */ \
|
||
NULL, /* get_queue */ \
|
||
NULL, /* set_queue */ \
|
||
NULL, /* delete_queue */ \
|
||
NULL, /* get_queue_stats */ \
|
||
NULL, /* dump_queues */ \
|
||
NULL, /* dump_queue_stats */ \
|
||
\
|
||
NULL, /* get_in4 */ \
|
||
NULL, /* set_in4 */ \
|
||
NULL, /* get_in6 */ \
|
||
NULL, /* add_router */ \
|
||
NULL, /* get_next_hop */ \
|
||
GET_STATUS, \
|
||
NULL, /* arp_lookup */ \
|
||
\
|
||
netdev_vport_update_flags, \
|
||
\
|
||
netdev_vport_change_seq
|
||
|
||
#define TUNNEL_CLASS(NAME, DPIF_PORT) \
|
||
{ DPIF_PORT, \
|
||
{ NAME, VPORT_FUNCTIONS(get_tunnel_config, \
|
||
set_tunnel_config, \
|
||
get_netdev_tunnel_config, \
|
||
tunnel_get_status) }}
|
||
|
||
void
|
||
netdev_vport_tunnel_register(void)
|
||
{
|
||
static const struct vport_class vport_classes[] = {
|
||
TUNNEL_CLASS("gre", "gre_system"),
|
||
TUNNEL_CLASS("ipsec_gre", "gre_system"),
|
||
TUNNEL_CLASS("gre64", "gre64_system"),
|
||
TUNNEL_CLASS("ipsec_gre64", "gre64_system"),
|
||
TUNNEL_CLASS("vxlan", "vxlan_system"),
|
||
TUNNEL_CLASS("lisp", "lisp_system")
|
||
};
|
||
|
||
int i;
|
||
|
||
for (i = 0; i < ARRAY_SIZE(vport_classes); i++) {
|
||
netdev_register_provider(&vport_classes[i].netdev_class);
|
||
}
|
||
}
|
||
|
||
void
|
||
netdev_vport_patch_register(void)
|
||
{
|
||
static const struct vport_class patch_class =
|
||
{ NULL,
|
||
{ "patch", VPORT_FUNCTIONS(get_patch_config,
|
||
set_patch_config,
|
||
NULL,
|
||
NULL) }};
|
||
netdev_register_provider(&patch_class.netdev_class);
|
||
}
|