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 internal_dev *internal_dev_priv(struct net_device *netdev)
41 return netdev_priv(netdev);
44 /* This function is only called by the kernel network layer.*/
45 static struct rtnl_link_stats64 *internal_dev_get_stats(struct net_device *netdev,
46 struct rtnl_link_stats64 *stats)
48 struct vport *vport = ovs_internal_dev_get_vport(netdev);
49 struct ovs_vport_stats vport_stats;
51 ovs_vport_get_stats(vport, &vport_stats);
53 /* The tx and rx stats need to be swapped because the
54 * switch and host OS have opposite perspectives. */
55 stats->rx_packets = vport_stats.tx_packets;
56 stats->tx_packets = vport_stats.rx_packets;
57 stats->rx_bytes = vport_stats.tx_bytes;
58 stats->tx_bytes = vport_stats.rx_bytes;
59 stats->rx_errors = vport_stats.tx_errors;
60 stats->tx_errors = vport_stats.rx_errors;
61 stats->rx_dropped = vport_stats.tx_dropped;
62 stats->tx_dropped = vport_stats.rx_dropped;
67 /* Called with rcu_read_lock_bh. */
68 static int internal_dev_xmit(struct sk_buff *skb, struct net_device *netdev)
71 ovs_vport_receive(internal_dev_priv(netdev)->vport, skb, NULL);
76 static int internal_dev_open(struct net_device *netdev)
78 netif_start_queue(netdev);
82 static int internal_dev_stop(struct net_device *netdev)
84 netif_stop_queue(netdev);
88 static void internal_dev_getinfo(struct net_device *netdev,
89 struct ethtool_drvinfo *info)
91 strlcpy(info->driver, "openvswitch", sizeof(info->driver));
94 static const struct ethtool_ops internal_dev_ethtool_ops = {
95 .get_drvinfo = internal_dev_getinfo,
96 .get_link = ethtool_op_get_link,
99 static int internal_dev_change_mtu(struct net_device *netdev, int new_mtu)
104 netdev->mtu = new_mtu;
108 static void internal_dev_destructor(struct net_device *dev)
110 struct vport *vport = ovs_internal_dev_get_vport(dev);
112 ovs_vport_free(vport);
116 static const struct net_device_ops internal_dev_netdev_ops = {
117 .ndo_open = internal_dev_open,
118 .ndo_stop = internal_dev_stop,
119 .ndo_start_xmit = internal_dev_xmit,
120 .ndo_set_mac_address = eth_mac_addr,
121 .ndo_change_mtu = internal_dev_change_mtu,
122 .ndo_get_stats64 = internal_dev_get_stats,
125 static struct rtnl_link_ops internal_dev_link_ops __read_mostly = {
126 .kind = "openvswitch",
129 static void do_setup(struct net_device *netdev)
133 netdev->netdev_ops = &internal_dev_netdev_ops;
135 netdev->priv_flags &= ~IFF_TX_SKB_SHARING;
136 netdev->priv_flags |= IFF_LIVE_ADDR_CHANGE;
137 netdev->destructor = internal_dev_destructor;
138 netdev->ethtool_ops = &internal_dev_ethtool_ops;
139 netdev->rtnl_link_ops = &internal_dev_link_ops;
140 netdev->tx_queue_len = 0;
142 netdev->features = NETIF_F_LLTX | NETIF_F_SG | NETIF_F_FRAGLIST |
143 NETIF_F_HIGHDMA | NETIF_F_HW_CSUM |
144 NETIF_F_GSO_SOFTWARE | NETIF_F_GSO_ENCAP_ALL;
146 netdev->vlan_features = netdev->features;
147 netdev->hw_enc_features = netdev->features;
148 netdev->features |= NETIF_F_HW_VLAN_CTAG_TX;
149 netdev->hw_features = netdev->features & ~NETIF_F_LLTX;
151 eth_hw_addr_random(netdev);
154 static struct vport *internal_dev_create(const struct vport_parms *parms)
157 struct netdev_vport *netdev_vport;
158 struct internal_dev *internal_dev;
161 vport = ovs_vport_alloc(sizeof(struct netdev_vport),
162 &ovs_internal_vport_ops, parms);
164 err = PTR_ERR(vport);
168 netdev_vport = netdev_vport_priv(vport);
170 netdev_vport->dev = alloc_netdev(sizeof(struct internal_dev),
171 parms->name, NET_NAME_UNKNOWN,
173 if (!netdev_vport->dev) {
175 goto error_free_vport;
178 dev_net_set(netdev_vport->dev, ovs_dp_get_net(vport->dp));
179 internal_dev = internal_dev_priv(netdev_vport->dev);
180 internal_dev->vport = vport;
182 /* Restrict bridge port to current netns. */
183 if (vport->port_no == OVSP_LOCAL)
184 netdev_vport->dev->features |= NETIF_F_NETNS_LOCAL;
187 err = register_netdevice(netdev_vport->dev);
189 goto error_free_netdev;
191 dev_set_promiscuity(netdev_vport->dev, 1);
193 netif_start_queue(netdev_vport->dev);
199 free_netdev(netdev_vport->dev);
201 ovs_vport_free(vport);
206 static void internal_dev_destroy(struct vport *vport)
208 struct netdev_vport *netdev_vport = netdev_vport_priv(vport);
210 netif_stop_queue(netdev_vport->dev);
212 dev_set_promiscuity(netdev_vport->dev, -1);
214 /* unregister_netdevice() waits for an RCU grace period. */
215 unregister_netdevice(netdev_vport->dev);
220 static int internal_dev_recv(struct vport *vport, struct sk_buff *skb)
222 struct net_device *netdev = netdev_vport_priv(vport)->dev;
232 skb->pkt_type = PACKET_HOST;
233 skb->protocol = eth_type_trans(skb, netdev);
234 skb_postpull_rcsum(skb, eth_hdr(skb), ETH_HLEN);
241 const struct vport_ops ovs_internal_vport_ops = {
242 .type = OVS_VPORT_TYPE_INTERNAL,
243 .create = internal_dev_create,
244 .destroy = internal_dev_destroy,
245 .get_name = ovs_netdev_get_name,
246 .send = internal_dev_recv,
249 int ovs_is_internal_dev(const struct net_device *netdev)
251 return netdev->netdev_ops == &internal_dev_netdev_ops;
254 struct vport *ovs_internal_dev_get_vport(struct net_device *netdev)
256 if (!ovs_is_internal_dev(netdev))
259 return internal_dev_priv(netdev)->vport;
262 int ovs_internal_dev_rtnl_link_register(void)
264 return rtnl_link_register(&internal_dev_link_ops);
267 void ovs_internal_dev_rtnl_link_unregister(void)
269 rtnl_link_unregister(&internal_dev_link_ops);