2 * Copyright (c) 2007-2012 Nicira, Inc.
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of version 2 of the GNU General Public
6 * License as published by the Free Software Foundation.
8 * This program is distributed in the hope that it will be useful, but
9 * WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 * General Public License for more details.
13 * You should have received a copy of the GNU General Public License
14 * along with this program; if not, write to the Free Software
15 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
19 #include <linux/hardirq.h>
20 #include <linux/if_vlan.h>
21 #include <linux/kernel.h>
22 #include <linux/netdevice.h>
23 #include <linux/etherdevice.h>
24 #include <linux/ethtool.h>
25 #include <linux/skbuff.h>
29 #include <net/rtnetlink.h>
32 #include "vport-internal_dev.h"
33 #include "vport-netdev.h"
39 static struct vport_ops ovs_internal_vport_ops;
41 static struct internal_dev *internal_dev_priv(struct net_device *netdev)
43 return netdev_priv(netdev);
46 /* This function is only called by the kernel network layer.*/
47 static struct rtnl_link_stats64 *internal_dev_get_stats(struct net_device *netdev,
48 struct rtnl_link_stats64 *stats)
50 struct vport *vport = ovs_internal_dev_get_vport(netdev);
51 struct ovs_vport_stats vport_stats;
53 ovs_vport_get_stats(vport, &vport_stats);
55 /* The tx and rx stats need to be swapped because the
56 * switch and host OS have opposite perspectives. */
57 stats->rx_packets = vport_stats.tx_packets;
58 stats->tx_packets = vport_stats.rx_packets;
59 stats->rx_bytes = vport_stats.tx_bytes;
60 stats->tx_bytes = vport_stats.rx_bytes;
61 stats->rx_errors = vport_stats.tx_errors;
62 stats->tx_errors = vport_stats.rx_errors;
63 stats->rx_dropped = vport_stats.tx_dropped;
64 stats->tx_dropped = vport_stats.rx_dropped;
69 /* Called with rcu_read_lock_bh. */
70 static int internal_dev_xmit(struct sk_buff *skb, struct net_device *netdev)
73 ovs_vport_receive(internal_dev_priv(netdev)->vport, skb, NULL);
78 static int internal_dev_open(struct net_device *netdev)
80 netif_start_queue(netdev);
84 static int internal_dev_stop(struct net_device *netdev)
86 netif_stop_queue(netdev);
90 static void internal_dev_getinfo(struct net_device *netdev,
91 struct ethtool_drvinfo *info)
93 strlcpy(info->driver, "openvswitch", sizeof(info->driver));
96 static const struct ethtool_ops internal_dev_ethtool_ops = {
97 .get_drvinfo = internal_dev_getinfo,
98 .get_link = ethtool_op_get_link,
101 static int internal_dev_change_mtu(struct net_device *netdev, int new_mtu)
106 netdev->mtu = new_mtu;
110 static void internal_dev_destructor(struct net_device *dev)
112 struct vport *vport = ovs_internal_dev_get_vport(dev);
114 ovs_vport_free(vport);
118 static const struct net_device_ops internal_dev_netdev_ops = {
119 .ndo_open = internal_dev_open,
120 .ndo_stop = internal_dev_stop,
121 .ndo_start_xmit = internal_dev_xmit,
122 .ndo_set_mac_address = eth_mac_addr,
123 .ndo_change_mtu = internal_dev_change_mtu,
124 .ndo_get_stats64 = internal_dev_get_stats,
127 static struct rtnl_link_ops internal_dev_link_ops __read_mostly = {
128 .kind = "openvswitch",
131 static void do_setup(struct net_device *netdev)
135 netdev->netdev_ops = &internal_dev_netdev_ops;
137 netdev->priv_flags &= ~IFF_TX_SKB_SHARING;
138 netdev->priv_flags |= IFF_LIVE_ADDR_CHANGE;
139 netdev->destructor = internal_dev_destructor;
140 netdev->ethtool_ops = &internal_dev_ethtool_ops;
141 netdev->rtnl_link_ops = &internal_dev_link_ops;
142 netdev->tx_queue_len = 0;
144 netdev->features = NETIF_F_LLTX | NETIF_F_SG | NETIF_F_FRAGLIST |
145 NETIF_F_HIGHDMA | NETIF_F_HW_CSUM |
146 NETIF_F_GSO_SOFTWARE | NETIF_F_GSO_ENCAP_ALL;
148 netdev->vlan_features = netdev->features;
149 netdev->hw_enc_features = netdev->features;
150 netdev->features |= NETIF_F_HW_VLAN_CTAG_TX;
151 netdev->hw_features = netdev->features & ~NETIF_F_LLTX;
153 eth_hw_addr_random(netdev);
156 static struct vport *internal_dev_create(const struct vport_parms *parms)
159 struct netdev_vport *netdev_vport;
160 struct internal_dev *internal_dev;
163 vport = ovs_vport_alloc(sizeof(struct netdev_vport),
164 &ovs_internal_vport_ops, parms);
166 err = PTR_ERR(vport);
170 netdev_vport = netdev_vport_priv(vport);
172 netdev_vport->dev = alloc_netdev(sizeof(struct internal_dev),
173 parms->name, NET_NAME_UNKNOWN,
175 if (!netdev_vport->dev) {
177 goto error_free_vport;
180 dev_net_set(netdev_vport->dev, ovs_dp_get_net(vport->dp));
181 internal_dev = internal_dev_priv(netdev_vport->dev);
182 internal_dev->vport = vport;
184 /* Restrict bridge port to current netns. */
185 if (vport->port_no == OVSP_LOCAL)
186 netdev_vport->dev->features |= NETIF_F_NETNS_LOCAL;
189 err = register_netdevice(netdev_vport->dev);
191 goto error_free_netdev;
193 dev_set_promiscuity(netdev_vport->dev, 1);
195 netif_start_queue(netdev_vport->dev);
201 free_netdev(netdev_vport->dev);
203 ovs_vport_free(vport);
208 static void internal_dev_destroy(struct vport *vport)
210 struct netdev_vport *netdev_vport = netdev_vport_priv(vport);
212 netif_stop_queue(netdev_vport->dev);
214 dev_set_promiscuity(netdev_vport->dev, -1);
216 /* unregister_netdevice() waits for an RCU grace period. */
217 unregister_netdevice(netdev_vport->dev);
222 static int internal_dev_recv(struct vport *vport, struct sk_buff *skb)
224 struct net_device *netdev = netdev_vport_priv(vport)->dev;
234 skb->pkt_type = PACKET_HOST;
235 skb->protocol = eth_type_trans(skb, netdev);
236 skb_postpull_rcsum(skb, eth_hdr(skb), ETH_HLEN);
243 static struct vport_ops ovs_internal_vport_ops = {
244 .type = OVS_VPORT_TYPE_INTERNAL,
245 .create = internal_dev_create,
246 .destroy = internal_dev_destroy,
247 .get_name = ovs_netdev_get_name,
248 .send = internal_dev_recv,
251 int ovs_is_internal_dev(const struct net_device *netdev)
253 return netdev->netdev_ops == &internal_dev_netdev_ops;
256 struct vport *ovs_internal_dev_get_vport(struct net_device *netdev)
258 if (!ovs_is_internal_dev(netdev))
261 return internal_dev_priv(netdev)->vport;
264 int ovs_internal_dev_rtnl_link_register(void)
268 err = rtnl_link_register(&internal_dev_link_ops);
272 err = ovs_vport_ops_register(&ovs_internal_vport_ops);
274 rtnl_link_unregister(&internal_dev_link_ops);
279 void ovs_internal_dev_rtnl_link_unregister(void)
281 ovs_vport_ops_unregister(&ovs_internal_vport_ops);
282 rtnl_link_unregister(&internal_dev_link_ops);