X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=lib%2Fnetdev-vport.c;h=bb9e510843b535eb87e9cea5430700f23f962dd5;hb=cceb11f5b12d09cc8afc87ca4fd03e941234d439;hp=a81262a6cae5caa92d028b45ce73709bf964298f;hpb=777ece0952d1087e2ac1c3aa33e9dda1fe60add6;p=sliver-openvswitch.git

diff --git a/lib/netdev-vport.c b/lib/netdev-vport.c
index a81262a6c..bb9e51084 100644
--- a/lib/netdev-vport.c
+++ b/lib/netdev-vport.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2010 Nicira Networks.
+ * Copyright (c) 2010, 2011 Nicira Networks.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -7,7 +7,7 @@
  *
  *     http://www.apache.org/licenses/LICENSE-2.0
  *
- * Unless required by applicable law or apatched to in writing, software
+ * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
@@ -15,23 +15,65 @@
  */
 
 #include <config.h>
+
+#include "netdev-vport.h"
+
 #include <errno.h>
 #include <fcntl.h>
+#include <sys/socket.h>
+#include <linux/rtnetlink.h>
+#include <net/if.h>
 #include <sys/ioctl.h>
 
+#include "byte-order.h"
+#include "hash.h"
+#include "hmap.h"
 #include "list.h"
-#include "netdev-vport.h"
+#include "netdev-provider.h"
+#include "netlink.h"
+#include "netlink-socket.h"
+#include "ofpbuf.h"
 #include "openvswitch/datapath-protocol.h"
+#include "openvswitch/tunnel.h"
+#include "packets.h"
+#include "rtnetlink.h"
+#include "route-table.h"
+#include "rtnetlink-link.h"
 #include "shash.h"
 #include "socket-util.h"
-
-#define THIS_MODULE VLM_netdev_vport
 #include "vlog.h"
 
+VLOG_DEFINE_THIS_MODULE(netdev_vport);
+
+static struct hmap name_map;
+static struct rtnetlink_notifier netdev_vport_link_notifier;
+
+struct name_node {
+    struct hmap_node node; /* Node in name_map. */
+    uint32_t ifi_index;    /* Kernel interface index. */
+
+    char ifname[IFNAMSIZ]; /* Interface name. */
+};
+
 struct netdev_vport_notifier {
     struct netdev_notifier notifier;
     struct list list_node;
-    struct shash_node *shash_node; 
+    struct shash_node *shash_node;
+};
+
+struct netdev_dev_vport {
+    struct netdev_dev netdev_dev;
+    uint64_t config[VPORT_CONFIG_SIZE / 8];
+};
+
+struct netdev_vport {
+    struct netdev netdev;
+};
+
+struct vport_class {
+    struct netdev_class netdev_class;
+    int (*parse_config)(const struct netdev_dev *, const struct shash *args,
+                        void *config);
 };
 
 static struct shash netdev_vport_notifiers =
@@ -39,23 +81,143 @@ static struct shash netdev_vport_notifiers =
 
 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(5, 20);
 
-int
-netdev_vport_do_ioctl(int cmd, void *arg)
+static int netdev_vport_do_ioctl(int cmd, void *arg);
+static int netdev_vport_create(const struct netdev_class *, const char *,
+                               const struct shash *, struct netdev_dev **);
+static void netdev_vport_poll_notify(const struct netdev *);
+
+static void netdev_vport_tnl_iface_init(void);
+static void netdev_vport_link_change(const struct rtnetlink_link_change *,
+                                     void *);
+static const char *netdev_vport_get_tnl_iface(const struct netdev *netdev);
+
+static bool
+is_vport_class(const struct netdev_class *class)
 {
-    static int ioctl_fd = -1;
+    return class->create == netdev_vport_create;
+}
 
-    if (ioctl_fd < 0) {
-        ioctl_fd = open("/dev/net/dp0", O_RDONLY | O_NONBLOCK);
-        if (ioctl_fd < 0) {
-            VLOG_ERR_RL(&rl, "failed to open ioctl fd: %s", strerror(errno));
-            return errno;
-        }
+static const struct vport_class *
+vport_class_cast(const struct netdev_class *class)
+{
+    assert(is_vport_class(class));
+    return CONTAINER_OF(class, struct vport_class, netdev_class);
+}
+
+static struct netdev_dev_vport *
+netdev_dev_vport_cast(const struct netdev_dev *netdev_dev)
+{
+    assert(is_vport_class(netdev_dev_get_class(netdev_dev)));
+    return CONTAINER_OF(netdev_dev, struct netdev_dev_vport, netdev_dev);
+}
+
+static struct netdev_vport *
+netdev_vport_cast(const struct netdev *netdev)
+{
+    struct netdev_dev *netdev_dev = netdev_get_dev(netdev);
+    assert(is_vport_class(netdev_dev_get_class(netdev_dev)));
+    return CONTAINER_OF(netdev, struct netdev_vport, netdev);
+}
+
+/* If 'netdev' is a vport netdev, copies its kernel configuration into
+ * 'config'.  Otherwise leaves 'config' untouched. */
+void
+netdev_vport_get_config(const struct netdev *netdev, void *config)
+{
+    const struct netdev_dev *dev = netdev_get_dev(netdev);
+
+    if (is_vport_class(netdev_dev_get_class(dev))) {
+        const struct netdev_dev_vport *vport = netdev_dev_vport_cast(dev);
+        memcpy(config, vport->config, VPORT_CONFIG_SIZE);
     }
+}
 
-    return ioctl(ioctl_fd, cmd, arg) ? errno : 0;
+static int
+netdev_vport_init(void)
+{
+    netdev_vport_tnl_iface_init();
+    route_table_register();
+    return 0;
 }
 
-int
+static int
+netdev_vport_create(const struct netdev_class *netdev_class, const char *name,
+                    const struct shash *args,
+                    struct netdev_dev **netdev_devp)
+{
+    const struct vport_class *vport_class = vport_class_cast(netdev_class);
+    struct netdev_dev_vport *dev;
+    int error;
+
+    dev = xmalloc(sizeof *dev);
+    *netdev_devp = &dev->netdev_dev;
+    netdev_dev_init(&dev->netdev_dev, name, netdev_class);
+
+    memset(dev->config, 0, sizeof dev->config);
+    error = vport_class->parse_config(&dev->netdev_dev, args, dev->config);
+
+    if (error) {
+        netdev_dev_uninit(&dev->netdev_dev, true);
+    }
+    return error;
+}
+
+static void
+netdev_vport_destroy(struct netdev_dev *netdev_dev_)
+{
+    struct netdev_dev_vport *netdev_dev = netdev_dev_vport_cast(netdev_dev_);
+
+    route_table_unregister();
+    free(netdev_dev);
+}
+
+static int
+netdev_vport_open(struct netdev_dev *netdev_dev_, int ethertype OVS_UNUSED,
+                struct netdev **netdevp)
+{
+    struct netdev_vport *netdev;
+
+    netdev = xmalloc(sizeof *netdev);
+    netdev_init(&netdev->netdev, netdev_dev_);
+
+    *netdevp = &netdev->netdev;
+    return 0;
+}
+
+static void
+netdev_vport_close(struct netdev *netdev_)
+{
+    struct netdev_vport *netdev = netdev_vport_cast(netdev_);
+    free(netdev);
+}
+
+static int
+netdev_vport_reconfigure(struct netdev_dev *dev_,
+                         const struct shash *args)
+{
+    const struct netdev_class *netdev_class = netdev_dev_get_class(dev_);
+    const struct vport_class *vport_class = vport_class_cast(netdev_class);
+    struct netdev_dev_vport *dev = netdev_dev_vport_cast(dev_);
+    struct odp_port port;
+    int error;
+
+    memset(&port, 0, sizeof port);
+    strncpy(port.devname, netdev_dev_get_name(dev_), sizeof port.devname);
+    strncpy(port.type, netdev_dev_get_type(dev_), sizeof port.type);
+    error = vport_class->parse_config(dev_, args, port.config);
+    if (!error && memcmp(port.config, dev->config, sizeof dev->config)) {
+        error = netdev_vport_do_ioctl(ODP_VPORT_MOD, &port);
+        if (!error || error == ENODEV) {
+            /* Either reconfiguration succeeded or this vport is not installed
+             * in the kernel (e.g. it hasn't been added to a dpif yet with
+             * dpif_port_add()). */
+            memcpy(dev->config, port.config, sizeof dev->config);
+        }
+    }
+    return error;
+}
+
+static int
 netdev_vport_set_etheraddr(struct netdev *netdev,
                            const uint8_t mac[ETH_ADDR_LEN])
 {
@@ -76,7 +238,7 @@ netdev_vport_set_etheraddr(struct netdev *netdev,
     return 0;
 }
 
-int
+static int
 netdev_vport_get_etheraddr(const struct netdev *netdev,
                            uint8_t mac[ETH_ADDR_LEN])
 {
@@ -95,7 +257,7 @@ netdev_vport_get_etheraddr(const struct netdev *netdev,
     return 0;
 }
 
-int
+static int
 netdev_vport_get_mtu(const struct netdev *netdev, int *mtup)
 {
     struct odp_vport_mtu vport_mtu;
@@ -113,13 +275,6 @@ netdev_vport_get_mtu(const struct netdev *netdev, int *mtup)
     return 0;
 }
 
-int
-netdev_vport_get_carrier(const struct netdev *netdev OVS_UNUSED, bool *carrier)
-{
-    *carrier = true;
-    return 0;
-}
-
 int
 netdev_vport_get_stats(const struct netdev *netdev, struct netdev_stats *stats)
 {
@@ -141,24 +296,88 @@ netdev_vport_get_stats(const struct netdev *netdev, struct netdev_stats *stats)
     stats->tx_errors = ovsr.stats.tx_errors;
     stats->rx_dropped = ovsr.stats.rx_dropped;
     stats->tx_dropped = ovsr.stats.tx_dropped;
-    stats->multicast = UINT64_MAX;
+    stats->multicast = ovsr.stats.multicast;
     stats->collisions = ovsr.stats.collisions;
-    stats->rx_length_errors = UINT64_MAX;
-    stats->rx_over_errors = ovsr.stats.rx_over_err;
-    stats->rx_crc_errors = ovsr.stats.rx_crc_err;
-    stats->rx_frame_errors = ovsr.stats.rx_frame_err;
-    stats->rx_fifo_errors = UINT64_MAX;
-    stats->rx_missed_errors = UINT64_MAX;
-    stats->tx_aborted_errors = UINT64_MAX;
-    stats->tx_carrier_errors = UINT64_MAX;
-    stats->tx_fifo_errors = UINT64_MAX;
-    stats->tx_heartbeat_errors = UINT64_MAX;
-    stats->tx_window_errors = UINT64_MAX;
+    stats->rx_length_errors = ovsr.stats.rx_length_errors;
+    stats->rx_over_errors = ovsr.stats.rx_over_errors;
+    stats->rx_crc_errors = ovsr.stats.rx_crc_errors;
+    stats->rx_frame_errors = ovsr.stats.rx_frame_errors;
+    stats->rx_fifo_errors = ovsr.stats.rx_fifo_errors;
+    stats->rx_missed_errors = ovsr.stats.rx_missed_errors;
+    stats->tx_aborted_errors = ovsr.stats.tx_aborted_errors;
+    stats->tx_carrier_errors = ovsr.stats.tx_carrier_errors;
+    stats->tx_fifo_errors = ovsr.stats.tx_fifo_errors;
+    stats->tx_heartbeat_errors = ovsr.stats.tx_heartbeat_errors;
+    stats->tx_window_errors = ovsr.stats.tx_window_errors;
 
     return 0;
 }
 
 int
+netdev_vport_set_stats(struct netdev *netdev, const struct netdev_stats *stats)
+{
+    struct odp_vport_stats_req ovsr;
+    int err;
+
+    ovs_strlcpy(ovsr.devname, netdev_get_name(netdev), sizeof ovsr.devname);
+
+    ovsr.stats.rx_packets = stats->rx_packets;
+    ovsr.stats.tx_packets = stats->tx_packets;
+    ovsr.stats.rx_bytes = stats->rx_bytes;
+    ovsr.stats.tx_bytes = stats->tx_bytes;
+    ovsr.stats.rx_errors = stats->rx_errors;
+    ovsr.stats.tx_errors = stats->tx_errors;
+    ovsr.stats.rx_dropped = stats->rx_dropped;
+    ovsr.stats.tx_dropped = stats->tx_dropped;
+    ovsr.stats.multicast = stats->multicast;
+    ovsr.stats.collisions = stats->collisions;
+    ovsr.stats.rx_length_errors = stats->rx_length_errors;
+    ovsr.stats.rx_over_errors = stats->rx_over_errors;
+    ovsr.stats.rx_crc_errors = stats->rx_crc_errors;
+    ovsr.stats.rx_frame_errors = stats->rx_frame_errors;
+    ovsr.stats.rx_fifo_errors = stats->rx_fifo_errors;
+    ovsr.stats.rx_missed_errors = stats->rx_missed_errors;
+    ovsr.stats.tx_aborted_errors = stats->tx_aborted_errors;
+    ovsr.stats.tx_carrier_errors = stats->tx_carrier_errors;
+    ovsr.stats.tx_fifo_errors = stats->tx_fifo_errors;
+    ovsr.stats.tx_heartbeat_errors = stats->tx_heartbeat_errors;
+    ovsr.stats.tx_window_errors = stats->tx_window_errors;
+
+    err = netdev_vport_do_ioctl(ODP_VPORT_STATS_SET, &ovsr);
+
+    /* If the vport layer doesn't know about the device, that doesn't mean it
+     * doesn't exist (after all were able to open it when netdev_open() was
+     * called), it just means that it isn't attached and we'll be getting
+     * stats a different way. */
+    if (err == ENODEV) {
+        err = EOPNOTSUPP;
+    }
+
+    return err;
+}
+
+static int
+netdev_vport_get_status(const struct netdev *netdev, struct shash *sh)
+{
+    const char *iface = netdev_vport_get_tnl_iface(netdev);
+
+    if (iface) {
+        struct netdev *egress_netdev;
+
+        shash_add(sh, "tunnel_egress_iface", xstrdup(iface));
+
+        if (!netdev_open_default(iface, &egress_netdev)) {
+            shash_add(sh, "tunnel_egress_iface_carrier",
+                      xstrdup(netdev_get_carrier(egress_netdev)
+                              ? "up" : "down"));
+            netdev_close(egress_netdev);
+        }
+    }
+
+    return 0;
+}
+
+static int
 netdev_vport_update_flags(struct netdev *netdev OVS_UNUSED,
                         enum netdev_flags off, enum netdev_flags on OVS_UNUSED,
                         enum netdev_flags *old_flagsp)
@@ -177,7 +396,7 @@ make_poll_name(const struct netdev *netdev)
     return xasprintf("%s:%s", netdev_get_type(netdev), netdev_get_name(netdev));
 }
 
-int
+static int
 netdev_vport_poll_add(struct netdev *netdev,
                       void (*cb)(struct netdev_notifier *), void *aux,
                       struct netdev_notifier **notifierp)
@@ -191,8 +410,7 @@ netdev_vport_poll_add(struct netdev *netdev,
     if (!shash_node) {
         list = xmalloc(sizeof *list);
         list_init(list);
-        shash_node = shash_add(&netdev_vport_notifiers,
-			       netdev_get_name(netdev), list);
+        shash_node = shash_add(&netdev_vport_notifiers, poll_name, list);
     } else {
         list = shash_node->data;
     }
@@ -208,7 +426,7 @@ netdev_vport_poll_add(struct netdev *netdev,
     return 0;
 }
 
-void
+static void
 netdev_vport_poll_remove(struct netdev_notifier *notifier_)
 {
     struct netdev_vport_notifier *notifier =
@@ -225,7 +443,177 @@ netdev_vport_poll_remove(struct netdev_notifier *notifier_)
     free(notifier);
 }
 
-void
+static void
+netdev_vport_run(void)
+{
+    rtnetlink_link_notifier_run();
+    route_table_run();
+}
+
+static void
+netdev_vport_wait(void)
+{
+    rtnetlink_link_notifier_wait();
+    route_table_wait();
+}
+
+/* get_tnl_iface() implementation. */
+
+static struct name_node *
+name_node_lookup(int ifi_index)
+{
+    struct name_node *nn;
+
+    HMAP_FOR_EACH_WITH_HASH(nn, node, hash_int(ifi_index, 0), &name_map) {
+        if (nn->ifi_index == ifi_index) {
+            return nn;
+        }
+    }
+
+    return NULL;
+}
+
+/* Queries the kernel for fresh data to populate the name map with. */
+static int
+netdev_vport_reset_names(void)
+{
+    int error;
+    struct nl_dump dump;
+    struct rtgenmsg *rtmsg;
+    struct ofpbuf request, reply;
+    static struct nl_sock *rtnl_sock;
+    struct name_node *nn, *nn_next;
+
+    HMAP_FOR_EACH_SAFE(nn, nn_next, node, &name_map) {
+        hmap_remove(&name_map, &nn->node);
+        free(nn);
+    }
+
+    error = nl_sock_create(NETLINK_ROUTE, &rtnl_sock);
+    if (error) {
+        VLOG_WARN_RL(&rl, "Failed to create NETLINK_ROUTE socket");
+        return error;
+    }
+
+    ofpbuf_init(&request, 0);
+
+    nl_msg_put_nlmsghdr(&request, sizeof *rtmsg, RTM_GETLINK, NLM_F_REQUEST);
+
+    rtmsg = ofpbuf_put_zeros(&request, sizeof *rtmsg);
+    rtmsg->rtgen_family = AF_INET;
+
+    nl_dump_start(&dump, rtnl_sock, &request);
+
+    while (nl_dump_next(&dump, &reply)) {
+        struct rtnetlink_link_change change;
+
+        if (rtnetlink_link_parse(&reply, &change)) {
+            netdev_vport_link_change(&change, NULL);
+        }
+    }
+
+    error = nl_dump_done(&dump);
+    nl_sock_destroy(rtnl_sock);
+
+    return error;
+}
+
+static void
+netdev_vport_link_change(const struct rtnetlink_link_change *change,
+                         void *aux OVS_UNUSED)
+{
+
+    if (!change) {
+        netdev_vport_reset_names();
+    } else if (change->nlmsg_type == RTM_NEWLINK) {
+        struct name_node *nn;
+
+        if (name_node_lookup(change->ifi_index)) {
+            return;
+        }
+
+        nn            = xzalloc(sizeof *nn);
+        nn->ifi_index = change->ifi_index;
+
+        strncpy(nn->ifname, change->ifname, IFNAMSIZ);
+        nn->ifname[IFNAMSIZ - 1] = '\0';
+
+        hmap_insert(&name_map, &nn->node, hash_int(nn->ifi_index, 0));
+    } else if (change->nlmsg_type == RTM_DELLINK) {
+        struct name_node *nn;
+
+        nn = name_node_lookup(change->ifi_index);
+
+        if (nn) {
+            hmap_remove(&name_map, &nn->node);
+            free(nn);
+        }
+
+    } else {
+        VLOG_WARN_RL(&rl, "Received unexpected rtnetlink message type %d",
+                     change->nlmsg_type);
+    }
+}
+
+static void
+netdev_vport_tnl_iface_init(void)
+{
+    static bool tnl_iface_is_init = false;
+
+    if (!tnl_iface_is_init) {
+        hmap_init(&name_map);
+
+        rtnetlink_link_notifier_register(&netdev_vport_link_notifier,
+                                         netdev_vport_link_change, NULL);
+
+        netdev_vport_reset_names();
+        tnl_iface_is_init = true;
+    }
+}
+
+static const char *
+netdev_vport_get_tnl_iface(const struct netdev *netdev)
+{
+    int ifindex;
+    uint32_t route;
+    struct netdev_dev_vport *ndv;
+    struct tnl_port_config *config;
+
+    ndv = netdev_dev_vport_cast(netdev_get_dev(netdev));
+    config = (struct tnl_port_config *) ndv->config;
+    route = config->daddr;
+
+    if (route_table_get_ifindex(route, &ifindex)) {
+        struct name_node *nn;
+        HMAP_FOR_EACH_WITH_HASH(nn, node, hash_int(ifindex, 0), &name_map) {
+            if (nn->ifi_index == ifindex) {
+                return nn->ifname;
+            }
+        }
+    }
+
+    return NULL;
+}
+
+/* Helper functions. */
+
+static int
+netdev_vport_do_ioctl(int cmd, void *arg)
+{
+    static int ioctl_fd = -1;
+
+    if (ioctl_fd < 0) {
+        ioctl_fd = open("/dev/net/dp0", O_RDONLY | O_NONBLOCK);
+        if (ioctl_fd < 0) {
+            VLOG_ERR_RL(&rl, "failed to open ioctl fd: %s", strerror(errno));
+            return errno;
+        }
+    }
+
+    return ioctl(ioctl_fd, cmd, arg) ? errno : 0;
+}
+
+static void
 netdev_vport_poll_notify(const struct netdev *netdev)
 {
     char *poll_name = make_poll_name(netdev);
@@ -235,8 +623,7 @@ netdev_vport_poll_notify(const struct netdev *netdev)
     if (list) {
         struct netdev_vport_notifier *notifier;
 
-        LIST_FOR_EACH (notifier, struct netdev_vport_notifier,
-                       list_node, list) {
+        LIST_FOR_EACH (notifier, list_node, list) {
             struct netdev_notifier *n = &notifier->notifier;
             n->cb(n);
         }
@@ -244,3 +631,261 @@ netdev_vport_poll_notify(const struct netdev *netdev)
 
     free(poll_name);
 }
+
+/* Code specific to individual vport types. */
+
+static int
+parse_tunnel_config(const struct netdev_dev *dev, const struct shash *args,
+                    void *configp)
+{
+    const char *name = netdev_dev_get_name(dev);
+    const char *type = netdev_dev_get_type(dev);
+    bool is_gre = false;
+    bool is_ipsec = false;
+    struct tnl_port_config config;
+    struct shash_node *node;
+    bool ipsec_mech_set = false;
+
+    memset(&config, 0, sizeof config);
+    config.flags |= TNL_F_PMTUD;
+    config.flags |= TNL_F_HDR_CACHE;
+
+    if (!strcmp(type, "gre")) {
+        is_gre = true;
+    } else if (!strcmp(type, "ipsec_gre")) {
+        is_gre = true;
+        is_ipsec = true;
+
+        config.flags |= TNL_F_IPSEC;
+
+        /* IPsec doesn't work when header caching is enabled. */
+        config.flags &= ~TNL_F_HDR_CACHE;
+    }
+
+    SHASH_FOR_EACH (node, args) {
+        if (!strcmp(node->name, "remote_ip")) {
+            struct in_addr in_addr;
+            if (lookup_ip(node->data, &in_addr)) {
+                VLOG_WARN("%s: bad %s 'remote_ip'", name, type);
+            } else {
+                config.daddr = in_addr.s_addr;
+            }
+        } else if (!strcmp(node->name, "local_ip")) {
+            struct in_addr in_addr;
+            if (lookup_ip(node->data, &in_addr)) {
+                VLOG_WARN("%s: bad %s 'local_ip'", name, type);
+            } else {
+                config.saddr = in_addr.s_addr;
+            }
+        } else if (!strcmp(node->name, "key") && is_gre) {
+            if (!strcmp(node->data, "flow")) {
+                config.flags |= TNL_F_IN_KEY_MATCH;
+                config.flags |= TNL_F_OUT_KEY_ACTION;
+            } else {
+                uint64_t key = strtoull(node->data, NULL, 0);
+                config.out_key = config.in_key = htonll(key);
+            }
+        } else if (!strcmp(node->name, "in_key") && is_gre) {
+            if (!strcmp(node->data, "flow")) {
+                config.flags |= TNL_F_IN_KEY_MATCH;
+            } else {
+                config.in_key = htonll(strtoull(node->data, NULL, 0));
+            }
+        } else if (!strcmp(node->name, "out_key") && is_gre) {
+            if (!strcmp(node->data, "flow")) {
+                config.flags |= TNL_F_OUT_KEY_ACTION;
+            } else {
+                config.out_key = htonll(strtoull(node->data, NULL, 0));
+            }
+        } else if (!strcmp(node->name, "tos")) {
+            if (!strcmp(node->data, "inherit")) {
+                config.flags |= TNL_F_TOS_INHERIT;
+            } else {
+                config.tos = atoi(node->data);
+            }
+        } else if (!strcmp(node->name, "ttl")) {
+            if (!strcmp(node->data, "inherit")) {
+                config.flags |= TNL_F_TTL_INHERIT;
+            } else {
+                config.ttl = atoi(node->data);
+            }
+        } else if (!strcmp(node->name, "csum") && is_gre) {
+            if (!strcmp(node->data, "true")) {
+                config.flags |= TNL_F_CSUM;
+            }
+        } else if (!strcmp(node->name, "pmtud")) {
+            if (!strcmp(node->data, "false")) {
+                config.flags &= ~TNL_F_PMTUD;
+            }
+        } else if (!strcmp(node->name, "header_cache")) {
+            if (!strcmp(node->data, "false")) {
+                config.flags &= ~TNL_F_HDR_CACHE;
+            }
+        } else if (!strcmp(node->name, "peer_cert") && is_ipsec) {
+            if (shash_find(args, "certificate")) {
+                ipsec_mech_set = true;
+            } else {
+                const char *use_ssl_cert;
+
+                /* If the "use_ssl_cert" is true, then "certificate" and
+                 * "private_key" will be pulled from the SSL table.  The
+                 * use of this option is strongly discouraged, since it
+                 * will like be removed when multiple SSL configurations
+                 * are supported by OVS.
+                 */
+                use_ssl_cert = shash_find_data(args, "use_ssl_cert");
+                if (!use_ssl_cert || strcmp(use_ssl_cert, "true")) {
+                    VLOG_WARN("%s: 'peer_cert' requires 'certificate' argument",
+                              name);
+                    return EINVAL;
+                }
+                ipsec_mech_set = true;
+            }
+        } else if (!strcmp(node->name, "psk") && is_ipsec) {
+            ipsec_mech_set = true;
+        } else if (is_ipsec
+                && (!strcmp(node->name, "certificate")
+                    || !strcmp(node->name, "private_key")
+                    || !strcmp(node->name, "use_ssl_cert"))) {
+            /* Ignore options not used by the netdev. */
+        } else {
+            VLOG_WARN("%s: unknown %s argument '%s'",
+                      name, type, node->name);
+        }
+    }
+
+    if (is_ipsec) {
+        if (shash_find(args, "peer_cert") && shash_find(args, "psk")) {
+            VLOG_WARN("%s: cannot define both 'peer_cert' and 'psk'", name);
+            return EINVAL;
+        }
+
+        if (!ipsec_mech_set) {
+            VLOG_WARN("%s: IPsec requires an 'peer_cert' or psk' argument",
+                      name);
+            return EINVAL;
+        }
+    }
+
+    if (!config.daddr) {
+        VLOG_WARN("%s: %s type requires valid 'remote_ip' argument",
+                  name, type);
+        return EINVAL;
+    }
+
+    BUILD_ASSERT(sizeof config <= VPORT_CONFIG_SIZE);
+    memcpy(configp, &config, sizeof config);
+    return 0;
+}
+
+static int
+parse_patch_config(const struct netdev_dev *dev, const struct shash *args,
+                   void *configp)
+{
+    const char *name = netdev_dev_get_name(dev);
+    const char *peer;
+
+    peer = shash_find_data(args, "peer");
+    if (!peer) {
+        VLOG_WARN("%s: patch type requires valid 'peer' argument", name);
+        return EINVAL;
+    }
+
+    if (shash_count(args) > 1) {
+        VLOG_WARN("%s: patch type takes only a 'peer' argument", name);
+        return EINVAL;
+    }
+
+    if (strlen(peer) >= MIN(IFNAMSIZ, VPORT_CONFIG_SIZE)) {
+        VLOG_WARN("%s: patch 'peer' arg too long", name);
+        return EINVAL;
+    }
+
+    if (!strcmp(name, peer)) {
+        VLOG_WARN("%s: patch peer must not be self", name);
+        return EINVAL;
+    }
+
+    strncpy(configp, peer, VPORT_CONFIG_SIZE);
+
+    return 0;
+}
+
+#define VPORT_FUNCTIONS(GET_STATUS)                         \
+    netdev_vport_init,                                      \
+    netdev_vport_run,                                       \
+    netdev_vport_wait,                                      \
+                                                            \
+    netdev_vport_create,                                    \
+    netdev_vport_destroy,                                   \
+    netdev_vport_reconfigure,                               \
+                                                            \
+    netdev_vport_open,                                      \
+    netdev_vport_close,                                     \
+                                                            \
+    NULL,                       /* enumerate */             \
+                                                            \
+    NULL,                       /* recv */                  \
+    NULL,                       /* recv_wait */             \
+    NULL,                       /* drain */                 \
+                                                            \
+    NULL,                       /* send */                  \
+    NULL,                       /* send_wait */             \
+                                                            \
+    netdev_vport_set_etheraddr,                             \
+    netdev_vport_get_etheraddr,                             \
+    netdev_vport_get_mtu,                                   \
+    NULL,                       /* get_ifindex */           \
+    NULL,                       /* get_carrier */           \
+    NULL,                       /* get_miimon */            \
+    netdev_vport_get_stats,                                 \
+    netdev_vport_set_stats,                                 \
+                                                            \
+    NULL,                       /* get_features */          \
+    NULL,                       /* set_advertisements */    \
+    NULL,                       /* get_vlan_vid */          \
+                                                            \
+    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_poll_add,                                  \
+    netdev_vport_poll_remove,
+
+void
+netdev_vport_register(void)
+{
+    static const struct vport_class vport_classes[] = {
+        { { "gre", VPORT_FUNCTIONS(netdev_vport_get_status) },
+            parse_tunnel_config },
+        { { "ipsec_gre", VPORT_FUNCTIONS(netdev_vport_get_status) },
+            parse_tunnel_config },
+        { { "capwap", VPORT_FUNCTIONS(netdev_vport_get_status) },
+            parse_tunnel_config },
+        { { "patch", VPORT_FUNCTIONS(NULL) }, parse_patch_config }
+    };
+
+    int i;
+
+    for (i = 0; i < ARRAY_SIZE(vport_classes); i++) {
+        netdev_register_provider(&vport_classes[i].netdev_class);
+    }
+}