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>
34 #include "vport-generic.h"
35 #include "vport-internal_dev.h"
36 #include "vport-netdev.h"
38 #if LINUX_VERSION_CODE >= KERNEL_VERSION(3,1,0)
39 #define HAVE_NET_DEVICE_OPS
44 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,22)
45 struct net_device_stats stats;
49 static struct internal_dev *internal_dev_priv(struct net_device *netdev)
51 return netdev_priv(netdev);
54 /* This function is only called by the kernel network layer.*/
55 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,36)
56 static struct rtnl_link_stats64 *internal_dev_get_stats(struct net_device *netdev,
57 struct rtnl_link_stats64 *stats)
60 static struct net_device_stats *internal_dev_sys_stats(struct net_device *netdev)
62 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,22)
63 struct net_device_stats *stats = &internal_dev_priv(netdev)->stats;
65 struct net_device_stats *stats = &netdev->stats;
68 struct vport *vport = ovs_internal_dev_get_vport(netdev);
69 struct ovs_vport_stats vport_stats;
71 ovs_vport_get_stats(vport, &vport_stats);
73 /* The tx and rx stats need to be swapped because the
74 * switch and host OS have opposite perspectives. */
75 stats->rx_packets = vport_stats.tx_packets;
76 stats->tx_packets = vport_stats.rx_packets;
77 stats->rx_bytes = vport_stats.tx_bytes;
78 stats->tx_bytes = vport_stats.rx_bytes;
79 stats->rx_errors = vport_stats.tx_errors;
80 stats->tx_errors = vport_stats.rx_errors;
81 stats->rx_dropped = vport_stats.tx_dropped;
82 stats->tx_dropped = vport_stats.rx_dropped;
87 static int internal_dev_mac_addr(struct net_device *dev, void *p)
89 struct sockaddr *addr = p;
91 if (!is_valid_ether_addr(addr->sa_data))
92 return -EADDRNOTAVAIL;
93 #ifdef NET_ADDR_RANDOM
94 dev->addr_assign_type &= ~NET_ADDR_RANDOM;
96 memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
100 /* Called with rcu_read_lock_bh. */
101 static int internal_dev_xmit(struct sk_buff *skb, struct net_device *netdev)
103 if (unlikely(compute_ip_summed(skb, true))) {
108 vlan_copy_skb_tci(skb);
109 OVS_CB(skb)->flow = NULL;
112 ovs_vport_receive(internal_dev_priv(netdev)->vport, skb);
117 static int internal_dev_open(struct net_device *netdev)
119 netif_start_queue(netdev);
123 static int internal_dev_stop(struct net_device *netdev)
125 netif_stop_queue(netdev);
129 static void internal_dev_getinfo(struct net_device *netdev,
130 struct ethtool_drvinfo *info)
132 strcpy(info->driver, "openvswitch");
135 static const struct ethtool_ops internal_dev_ethtool_ops = {
136 .get_drvinfo = internal_dev_getinfo,
137 .get_link = ethtool_op_get_link,
138 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,39)
139 .get_sg = ethtool_op_get_sg,
140 .set_sg = ethtool_op_set_sg,
141 .get_tx_csum = ethtool_op_get_tx_csum,
142 .set_tx_csum = ethtool_op_set_tx_hw_csum,
143 .get_tso = ethtool_op_get_tso,
144 .set_tso = ethtool_op_set_tso,
148 static int internal_dev_change_mtu(struct net_device *netdev, int new_mtu)
153 netdev->mtu = new_mtu;
157 static int internal_dev_do_ioctl(struct net_device *dev,
158 struct ifreq *ifr, int cmd)
160 if (ovs_dp_ioctl_hook)
161 return ovs_dp_ioctl_hook(dev, ifr, cmd);
166 static void internal_dev_destructor(struct net_device *dev)
168 struct vport *vport = ovs_internal_dev_get_vport(dev);
170 ovs_vport_free(vport);
174 #ifdef HAVE_NET_DEVICE_OPS
175 static const struct net_device_ops internal_dev_netdev_ops = {
176 .ndo_open = internal_dev_open,
177 .ndo_stop = internal_dev_stop,
178 .ndo_start_xmit = internal_dev_xmit,
179 .ndo_set_mac_address = internal_dev_mac_addr,
180 .ndo_do_ioctl = internal_dev_do_ioctl,
181 .ndo_change_mtu = internal_dev_change_mtu,
182 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,36)
183 .ndo_get_stats64 = internal_dev_get_stats,
185 .ndo_get_stats = internal_dev_sys_stats,
190 static void do_setup(struct net_device *netdev)
194 #ifdef HAVE_NET_DEVICE_OPS
195 netdev->netdev_ops = &internal_dev_netdev_ops;
197 netdev->do_ioctl = internal_dev_do_ioctl;
198 netdev->get_stats = internal_dev_sys_stats;
199 netdev->hard_start_xmit = internal_dev_xmit;
200 netdev->open = internal_dev_open;
201 netdev->stop = internal_dev_stop;
202 netdev->set_mac_address = internal_dev_mac_addr;
203 netdev->change_mtu = internal_dev_change_mtu;
206 netdev->priv_flags &= ~IFF_TX_SKB_SHARING;
207 netdev->destructor = internal_dev_destructor;
208 SET_ETHTOOL_OPS(netdev, &internal_dev_ethtool_ops);
209 netdev->tx_queue_len = 0;
211 netdev->features = NETIF_F_LLTX | NETIF_F_SG | NETIF_F_FRAGLIST |
212 NETIF_F_HIGHDMA | NETIF_F_HW_CSUM | NETIF_F_TSO;
214 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,27)
215 netdev->vlan_features = netdev->features;
216 netdev->features |= NETIF_F_HW_VLAN_TX;
219 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,39)
220 netdev->hw_features = netdev->features & ~NETIF_F_LLTX;
222 eth_hw_addr_random(netdev);
225 static struct vport *internal_dev_create(const struct vport_parms *parms)
228 struct netdev_vport *netdev_vport;
229 struct internal_dev *internal_dev;
232 vport = ovs_vport_alloc(sizeof(struct netdev_vport),
233 &ovs_internal_vport_ops, parms);
235 err = PTR_ERR(vport);
239 netdev_vport = netdev_vport_priv(vport);
241 netdev_vport->dev = alloc_netdev(sizeof(struct internal_dev),
242 parms->name, do_setup);
243 if (!netdev_vport->dev) {
245 goto error_free_vport;
248 dev_net_set(netdev_vport->dev, ovs_dp_get_net(vport->dp));
249 internal_dev = internal_dev_priv(netdev_vport->dev);
250 internal_dev->vport = vport;
252 /* Restrict bridge port to current netns. */
253 if (vport->port_no == OVSP_LOCAL)
254 netdev_vport->dev->features |= NETIF_F_NETNS_LOCAL;
256 err = register_netdevice(netdev_vport->dev);
258 goto error_free_netdev;
260 dev_set_promiscuity(netdev_vport->dev, 1);
261 netif_start_queue(netdev_vport->dev);
266 free_netdev(netdev_vport->dev);
268 ovs_vport_free(vport);
273 static void internal_dev_destroy(struct vport *vport)
275 struct netdev_vport *netdev_vport = netdev_vport_priv(vport);
277 netif_stop_queue(netdev_vport->dev);
278 dev_set_promiscuity(netdev_vport->dev, -1);
280 /* unregister_netdevice() waits for an RCU grace period. */
281 unregister_netdevice(netdev_vport->dev);
284 static int internal_dev_recv(struct vport *vport, struct sk_buff *skb)
286 struct net_device *netdev = netdev_vport_priv(vport)->dev;
289 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,37)
290 if (unlikely(vlan_deaccel_tag(skb)))
301 skb->pkt_type = PACKET_HOST;
302 skb->protocol = eth_type_trans(skb, netdev);
303 forward_ip_summed(skb, false);
307 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,29)
308 netdev->last_rx = jiffies;
314 const struct vport_ops ovs_internal_vport_ops = {
315 .type = OVS_VPORT_TYPE_INTERNAL,
316 .flags = VPORT_F_REQUIRED | VPORT_F_FLOW,
317 .create = internal_dev_create,
318 .destroy = internal_dev_destroy,
319 .set_addr = ovs_netdev_set_addr,
320 .get_name = ovs_netdev_get_name,
321 .get_addr = ovs_netdev_get_addr,
322 .get_kobj = ovs_netdev_get_kobj,
323 .get_dev_flags = ovs_netdev_get_dev_flags,
324 .is_running = ovs_netdev_is_running,
325 .get_operstate = ovs_netdev_get_operstate,
326 .get_ifindex = ovs_netdev_get_ifindex,
327 .get_mtu = ovs_netdev_get_mtu,
328 .send = internal_dev_recv,
331 int ovs_is_internal_dev(const struct net_device *netdev)
333 #ifdef HAVE_NET_DEVICE_OPS
334 return netdev->netdev_ops == &internal_dev_netdev_ops;
336 return netdev->open == internal_dev_open;
340 struct vport *ovs_internal_dev_get_vport(struct net_device *netdev)
342 if (!ovs_is_internal_dev(netdev))
345 return internal_dev_priv(netdev)->vport;