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>
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 #ifdef NET_ADDR_RANDOM
91 dev->addr_assign_type &= ~NET_ADDR_RANDOM;
93 memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
97 /* Called with rcu_read_lock_bh. */
98 static int internal_dev_xmit(struct sk_buff *skb, struct net_device *netdev)
100 if (unlikely(compute_ip_summed(skb, true))) {
105 vlan_copy_skb_tci(skb);
106 OVS_CB(skb)->flow = NULL;
109 ovs_vport_receive(internal_dev_priv(netdev)->vport, skb);
114 static int internal_dev_open(struct net_device *netdev)
116 netif_start_queue(netdev);
120 static int internal_dev_stop(struct net_device *netdev)
122 netif_stop_queue(netdev);
126 static void internal_dev_getinfo(struct net_device *netdev,
127 struct ethtool_drvinfo *info)
129 strcpy(info->driver, "openvswitch");
132 static const struct ethtool_ops internal_dev_ethtool_ops = {
133 .get_drvinfo = internal_dev_getinfo,
134 .get_link = ethtool_op_get_link,
135 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,39)
136 .get_sg = ethtool_op_get_sg,
137 .set_sg = ethtool_op_set_sg,
138 .get_tx_csum = ethtool_op_get_tx_csum,
139 .set_tx_csum = ethtool_op_set_tx_hw_csum,
140 .get_tso = ethtool_op_get_tso,
141 .set_tso = ethtool_op_set_tso,
145 static int internal_dev_change_mtu(struct net_device *netdev, int new_mtu)
150 netdev->mtu = new_mtu;
154 static int internal_dev_do_ioctl(struct net_device *dev,
155 struct ifreq *ifr, int cmd)
157 if (ovs_dp_ioctl_hook)
158 return ovs_dp_ioctl_hook(dev, ifr, cmd);
163 static void internal_dev_destructor(struct net_device *dev)
165 struct vport *vport = ovs_internal_dev_get_vport(dev);
167 ovs_vport_free(vport);
171 #ifdef HAVE_NET_DEVICE_OPS
172 static const struct net_device_ops internal_dev_netdev_ops = {
173 .ndo_open = internal_dev_open,
174 .ndo_stop = internal_dev_stop,
175 .ndo_start_xmit = internal_dev_xmit,
176 .ndo_set_mac_address = internal_dev_mac_addr,
177 .ndo_do_ioctl = internal_dev_do_ioctl,
178 .ndo_change_mtu = internal_dev_change_mtu,
179 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,36)
180 .ndo_get_stats64 = internal_dev_get_stats,
182 .ndo_get_stats = internal_dev_sys_stats,
187 static void do_setup(struct net_device *netdev)
191 #ifdef HAVE_NET_DEVICE_OPS
192 netdev->netdev_ops = &internal_dev_netdev_ops;
194 netdev->do_ioctl = internal_dev_do_ioctl;
195 netdev->get_stats = internal_dev_sys_stats;
196 netdev->hard_start_xmit = internal_dev_xmit;
197 netdev->open = internal_dev_open;
198 netdev->stop = internal_dev_stop;
199 netdev->set_mac_address = internal_dev_mac_addr;
200 netdev->change_mtu = internal_dev_change_mtu;
203 netdev->priv_flags &= ~IFF_TX_SKB_SHARING;
204 netdev->destructor = internal_dev_destructor;
205 SET_ETHTOOL_OPS(netdev, &internal_dev_ethtool_ops);
206 netdev->tx_queue_len = 0;
208 netdev->features = NETIF_F_LLTX | NETIF_F_SG | NETIF_F_FRAGLIST |
209 NETIF_F_HIGHDMA | NETIF_F_HW_CSUM | NETIF_F_TSO;
211 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,27)
212 netdev->vlan_features = netdev->features;
213 netdev->features |= NETIF_F_HW_VLAN_TX;
216 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,39)
217 netdev->hw_features = netdev->features & ~NETIF_F_LLTX;
219 eth_hw_addr_random(netdev);
222 static struct vport *internal_dev_create(const struct vport_parms *parms)
225 struct netdev_vport *netdev_vport;
226 struct internal_dev *internal_dev;
229 vport = ovs_vport_alloc(sizeof(struct netdev_vport),
230 &ovs_internal_vport_ops, parms);
232 err = PTR_ERR(vport);
236 netdev_vport = netdev_vport_priv(vport);
238 netdev_vport->dev = alloc_netdev(sizeof(struct internal_dev),
239 parms->name, do_setup);
240 if (!netdev_vport->dev) {
242 goto error_free_vport;
245 dev_net_set(netdev_vport->dev, ovs_dp_get_net(vport->dp));
246 internal_dev = internal_dev_priv(netdev_vport->dev);
247 internal_dev->vport = vport;
249 /* Restrict bridge port to current netns. */
250 if (vport->port_no == OVSP_LOCAL)
251 netdev_vport->dev->features |= NETIF_F_NETNS_LOCAL;
253 err = register_netdevice(netdev_vport->dev);
255 goto error_free_netdev;
257 dev_set_promiscuity(netdev_vport->dev, 1);
258 netif_start_queue(netdev_vport->dev);
263 free_netdev(netdev_vport->dev);
265 ovs_vport_free(vport);
270 static void internal_dev_destroy(struct vport *vport)
272 struct netdev_vport *netdev_vport = netdev_vport_priv(vport);
274 netif_stop_queue(netdev_vport->dev);
275 dev_set_promiscuity(netdev_vport->dev, -1);
277 /* unregister_netdevice() waits for an RCU grace period. */
278 unregister_netdevice(netdev_vport->dev);
281 static int internal_dev_recv(struct vport *vport, struct sk_buff *skb)
283 struct net_device *netdev = netdev_vport_priv(vport)->dev;
286 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,37)
287 if (unlikely(vlan_deaccel_tag(skb)))
293 skb->pkt_type = PACKET_HOST;
294 skb->protocol = eth_type_trans(skb, netdev);
295 forward_ip_summed(skb, false);
299 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,29)
300 netdev->last_rx = jiffies;
306 const struct vport_ops ovs_internal_vport_ops = {
307 .type = OVS_VPORT_TYPE_INTERNAL,
308 .flags = VPORT_F_REQUIRED | VPORT_F_FLOW,
309 .create = internal_dev_create,
310 .destroy = internal_dev_destroy,
311 .set_addr = ovs_netdev_set_addr,
312 .get_name = ovs_netdev_get_name,
313 .get_addr = ovs_netdev_get_addr,
314 .get_kobj = ovs_netdev_get_kobj,
315 .get_dev_flags = ovs_netdev_get_dev_flags,
316 .is_running = ovs_netdev_is_running,
317 .get_operstate = ovs_netdev_get_operstate,
318 .get_ifindex = ovs_netdev_get_ifindex,
319 .get_mtu = ovs_netdev_get_mtu,
320 .send = internal_dev_recv,
323 int ovs_is_internal_dev(const struct net_device *netdev)
325 #ifdef HAVE_NET_DEVICE_OPS
326 return netdev->netdev_ops == &internal_dev_netdev_ops;
328 return netdev->open == internal_dev_open;
332 struct vport *ovs_internal_dev_get_vport(struct net_device *netdev)
334 if (!ovs_is_internal_dev(netdev))
337 return internal_dev_priv(netdev)->vport;