2 * Copyright (c) 2007-2011 Nicira Networks.
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>
26 #include <linux/version.h>
31 #include "vport-generic.h"
32 #include "vport-internal_dev.h"
33 #include "vport-netdev.h"
35 #if LINUX_VERSION_CODE >= KERNEL_VERSION(3,1,0)
36 #define HAVE_NET_DEVICE_OPS
41 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,22)
42 struct net_device_stats stats;
46 static struct internal_dev *internal_dev_priv(struct net_device *netdev)
48 return netdev_priv(netdev);
51 /* This function is only called by the kernel network layer.*/
52 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,36)
53 static struct rtnl_link_stats64 *internal_dev_get_stats(struct net_device *netdev,
54 struct rtnl_link_stats64 *stats)
57 static struct net_device_stats *internal_dev_sys_stats(struct net_device *netdev)
59 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,22)
60 struct net_device_stats *stats = &internal_dev_priv(netdev)->stats;
62 struct net_device_stats *stats = &netdev->stats;
65 struct vport *vport = ovs_internal_dev_get_vport(netdev);
66 struct ovs_vport_stats vport_stats;
68 ovs_vport_get_stats(vport, &vport_stats);
70 /* The tx and rx stats need to be swapped because the
71 * switch and host OS have opposite perspectives. */
72 stats->rx_packets = vport_stats.tx_packets;
73 stats->tx_packets = vport_stats.rx_packets;
74 stats->rx_bytes = vport_stats.tx_bytes;
75 stats->tx_bytes = vport_stats.rx_bytes;
76 stats->rx_errors = vport_stats.tx_errors;
77 stats->tx_errors = vport_stats.rx_errors;
78 stats->rx_dropped = vport_stats.tx_dropped;
79 stats->tx_dropped = vport_stats.rx_dropped;
84 static int internal_dev_mac_addr(struct net_device *dev, void *p)
86 struct sockaddr *addr = p;
88 if (!is_valid_ether_addr(addr->sa_data))
89 return -EADDRNOTAVAIL;
90 memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
94 /* Called with rcu_read_lock_bh. */
95 static int internal_dev_xmit(struct sk_buff *skb, struct net_device *netdev)
97 if (unlikely(compute_ip_summed(skb, true))) {
102 vlan_copy_skb_tci(skb);
103 OVS_CB(skb)->flow = NULL;
106 ovs_vport_receive(internal_dev_priv(netdev)->vport, skb);
111 static int internal_dev_open(struct net_device *netdev)
113 netif_start_queue(netdev);
117 static int internal_dev_stop(struct net_device *netdev)
119 netif_stop_queue(netdev);
123 static void internal_dev_getinfo(struct net_device *netdev,
124 struct ethtool_drvinfo *info)
126 strcpy(info->driver, "openvswitch");
129 static const struct ethtool_ops internal_dev_ethtool_ops = {
130 .get_drvinfo = internal_dev_getinfo,
131 .get_link = ethtool_op_get_link,
132 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,39)
133 .get_sg = ethtool_op_get_sg,
134 .set_sg = ethtool_op_set_sg,
135 .get_tx_csum = ethtool_op_get_tx_csum,
136 .set_tx_csum = ethtool_op_set_tx_hw_csum,
137 .get_tso = ethtool_op_get_tso,
138 .set_tso = ethtool_op_set_tso,
142 static int internal_dev_change_mtu(struct net_device *netdev, int new_mtu)
147 netdev->mtu = new_mtu;
151 static int internal_dev_do_ioctl(struct net_device *dev,
152 struct ifreq *ifr, int cmd)
154 if (ovs_dp_ioctl_hook)
155 return ovs_dp_ioctl_hook(dev, ifr, cmd);
160 static void internal_dev_destructor(struct net_device *dev)
162 struct vport *vport = ovs_internal_dev_get_vport(dev);
164 ovs_vport_free(vport);
168 #ifdef HAVE_NET_DEVICE_OPS
169 static const struct net_device_ops internal_dev_netdev_ops = {
170 .ndo_open = internal_dev_open,
171 .ndo_stop = internal_dev_stop,
172 .ndo_start_xmit = internal_dev_xmit,
173 .ndo_set_mac_address = internal_dev_mac_addr,
174 .ndo_do_ioctl = internal_dev_do_ioctl,
175 .ndo_change_mtu = internal_dev_change_mtu,
176 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,36)
177 .ndo_get_stats64 = internal_dev_get_stats,
179 .ndo_get_stats = internal_dev_sys_stats,
184 static void do_setup(struct net_device *netdev)
188 #ifdef HAVE_NET_DEVICE_OPS
189 netdev->netdev_ops = &internal_dev_netdev_ops;
191 netdev->do_ioctl = internal_dev_do_ioctl;
192 netdev->get_stats = internal_dev_sys_stats;
193 netdev->hard_start_xmit = internal_dev_xmit;
194 netdev->open = internal_dev_open;
195 netdev->stop = internal_dev_stop;
196 netdev->set_mac_address = internal_dev_mac_addr;
197 netdev->change_mtu = internal_dev_change_mtu;
200 netdev->priv_flags &= ~IFF_TX_SKB_SHARING;
201 netdev->destructor = internal_dev_destructor;
202 SET_ETHTOOL_OPS(netdev, &internal_dev_ethtool_ops);
203 netdev->tx_queue_len = 0;
205 netdev->features = NETIF_F_LLTX | NETIF_F_SG | NETIF_F_FRAGLIST |
206 NETIF_F_HIGHDMA | NETIF_F_HW_CSUM | NETIF_F_TSO;
208 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,27)
209 netdev->vlan_features = netdev->features;
210 netdev->features |= NETIF_F_HW_VLAN_TX;
213 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,39)
214 netdev->hw_features = netdev->features & ~NETIF_F_LLTX;
216 random_ether_addr(netdev->dev_addr);
219 static struct vport *internal_dev_create(const struct vport_parms *parms)
222 struct netdev_vport *netdev_vport;
223 struct internal_dev *internal_dev;
226 vport = ovs_vport_alloc(sizeof(struct netdev_vport),
227 &ovs_internal_vport_ops, parms);
229 err = PTR_ERR(vport);
233 netdev_vport = netdev_vport_priv(vport);
235 netdev_vport->dev = alloc_netdev(sizeof(struct internal_dev),
236 parms->name, do_setup);
237 if (!netdev_vport->dev) {
239 goto error_free_vport;
242 internal_dev = internal_dev_priv(netdev_vport->dev);
243 internal_dev->vport = vport;
245 err = register_netdevice(netdev_vport->dev);
247 goto error_free_netdev;
249 dev_set_promiscuity(netdev_vport->dev, 1);
250 netif_start_queue(netdev_vport->dev);
255 free_netdev(netdev_vport->dev);
257 ovs_vport_free(vport);
262 static void internal_dev_destroy(struct vport *vport)
264 struct netdev_vport *netdev_vport = netdev_vport_priv(vport);
266 netif_stop_queue(netdev_vport->dev);
267 dev_set_promiscuity(netdev_vport->dev, -1);
269 /* unregister_netdevice() waits for an RCU grace period. */
270 unregister_netdevice(netdev_vport->dev);
273 static int internal_dev_recv(struct vport *vport, struct sk_buff *skb)
275 struct net_device *netdev = netdev_vport_priv(vport)->dev;
278 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,37)
279 if (unlikely(vlan_deaccel_tag(skb)))
285 skb->pkt_type = PACKET_HOST;
286 skb->protocol = eth_type_trans(skb, netdev);
287 forward_ip_summed(skb, false);
291 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,29)
292 netdev->last_rx = jiffies;
298 const struct vport_ops ovs_internal_vport_ops = {
299 .type = OVS_VPORT_TYPE_INTERNAL,
300 .flags = VPORT_F_REQUIRED | VPORT_F_FLOW,
301 .create = internal_dev_create,
302 .destroy = internal_dev_destroy,
303 .set_addr = ovs_netdev_set_addr,
304 .get_name = ovs_netdev_get_name,
305 .get_addr = ovs_netdev_get_addr,
306 .get_kobj = ovs_netdev_get_kobj,
307 .get_dev_flags = ovs_netdev_get_dev_flags,
308 .is_running = ovs_netdev_is_running,
309 .get_operstate = ovs_netdev_get_operstate,
310 .get_ifindex = ovs_netdev_get_ifindex,
311 .get_mtu = ovs_netdev_get_mtu,
312 .send = internal_dev_recv,
315 int ovs_is_internal_dev(const struct net_device *netdev)
317 #ifdef HAVE_NET_DEVICE_OPS
318 return netdev->netdev_ops == &internal_dev_netdev_ops;
320 return netdev->open == internal_dev_open;
324 struct vport *ovs_internal_dev_get_vport(struct net_device *netdev)
326 if (!ovs_is_internal_dev(netdev))
329 return internal_dev_priv(netdev)->vport;