2 * Copyright (c) 2009, 2010 Nicira Networks.
3 * Distributed under the terms of the GNU GPL version 2.
5 * Significant portions of this file may be copied from parts of the Linux
6 * kernel, by Linus Torvalds and others.
9 #include <linux/kernel.h>
10 #include <linux/netdevice.h>
11 #include <linux/etherdevice.h>
12 #include <linux/ethtool.h>
13 #include <linux/rcupdate.h>
14 #include <linux/skbuff.h>
15 #include <linux/version.h>
18 #include "vport-generic.h"
19 #include "vport-internal_dev.h"
20 #include "vport-netdev.h"
23 struct vport *attached_vport, *vport;
24 struct net_device_stats stats;
27 static inline struct internal_dev *internal_dev_priv(struct net_device *netdev)
29 return netdev_priv(netdev);
32 /* This function is only called by the kernel network layer. It is not a vport
33 * get_stats() function. If a vport get_stats() function is defined that
34 * results in this being called it will cause infinite recursion. */
35 static struct net_device_stats *internal_dev_sys_stats(struct net_device *netdev)
37 struct vport *vport = internal_dev_get_vport(netdev);
38 struct net_device_stats *stats = &internal_dev_priv(netdev)->stats;
41 struct rtnl_link_stats64 vport_stats;
43 vport_get_stats(vport, &vport_stats);
45 /* The tx and rx stats need to be swapped because the switch
46 * and host OS have opposite perspectives. */
47 stats->rx_packets = vport_stats.tx_packets;
48 stats->tx_packets = vport_stats.rx_packets;
49 stats->rx_bytes = vport_stats.tx_bytes;
50 stats->tx_bytes = vport_stats.rx_bytes;
51 stats->rx_errors = vport_stats.tx_errors;
52 stats->tx_errors = vport_stats.rx_errors;
53 stats->rx_dropped = vport_stats.tx_dropped;
54 stats->tx_dropped = vport_stats.rx_dropped;
55 stats->collisions = vport_stats.collisions;
61 static int internal_dev_mac_addr(struct net_device *dev, void *p)
63 struct sockaddr *addr = p;
65 if (!is_valid_ether_addr(addr->sa_data))
66 return -EADDRNOTAVAIL;
67 memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
71 /* Called with rcu_read_lock and bottom-halves disabled. */
72 static int internal_dev_xmit(struct sk_buff *skb, struct net_device *netdev)
74 struct internal_dev *internal_dev = internal_dev_priv(netdev);
75 struct vport *vport = rcu_dereference(internal_dev->vport);
77 compute_ip_summed(skb, true);
78 OVS_CB(skb)->flow = NULL;
80 vport_receive(vport, skb);
84 static int internal_dev_open(struct net_device *netdev)
86 netif_start_queue(netdev);
90 static int internal_dev_stop(struct net_device *netdev)
92 netif_stop_queue(netdev);
96 static void internal_dev_getinfo(struct net_device *netdev,
97 struct ethtool_drvinfo *info)
99 struct vport *vport = internal_dev_get_vport(netdev);
101 strcpy(info->driver, "openvswitch");
106 sprintf(info->bus_info, "%d.%d", vport->dp->dp_idx, vport->port_no);
109 static const struct ethtool_ops internal_dev_ethtool_ops = {
110 .get_drvinfo = internal_dev_getinfo,
111 .get_link = ethtool_op_get_link,
112 .get_sg = ethtool_op_get_sg,
113 .set_sg = ethtool_op_set_sg,
114 .get_tx_csum = ethtool_op_get_tx_csum,
115 .set_tx_csum = ethtool_op_set_tx_hw_csum,
116 .get_tso = ethtool_op_get_tso,
117 .set_tso = ethtool_op_set_tso,
120 static int internal_dev_change_mtu(struct net_device *netdev, int new_mtu)
122 struct vport *vport = internal_dev_get_vport(netdev);
127 if (vport && new_mtu > dp_min_mtu(vport->dp))
130 netdev->mtu = new_mtu;
134 static int internal_dev_do_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
137 return dp_ioctl_hook(dev, ifr, cmd);
142 #ifdef HAVE_NET_DEVICE_OPS
143 static const struct net_device_ops internal_dev_netdev_ops = {
144 .ndo_open = internal_dev_open,
145 .ndo_stop = internal_dev_stop,
146 .ndo_start_xmit = internal_dev_xmit,
147 .ndo_set_mac_address = internal_dev_mac_addr,
148 .ndo_do_ioctl = internal_dev_do_ioctl,
149 .ndo_change_mtu = internal_dev_change_mtu,
150 .ndo_get_stats = internal_dev_sys_stats,
154 static void do_setup(struct net_device *netdev)
158 #ifdef HAVE_NET_DEVICE_OPS
159 netdev->netdev_ops = &internal_dev_netdev_ops;
161 netdev->do_ioctl = internal_dev_do_ioctl;
162 netdev->get_stats = internal_dev_sys_stats;
163 netdev->hard_start_xmit = internal_dev_xmit;
164 netdev->open = internal_dev_open;
165 netdev->stop = internal_dev_stop;
166 netdev->set_mac_address = internal_dev_mac_addr;
167 netdev->change_mtu = internal_dev_change_mtu;
170 netdev->destructor = free_netdev;
171 SET_ETHTOOL_OPS(netdev, &internal_dev_ethtool_ops);
172 netdev->tx_queue_len = 0;
174 netdev->flags = IFF_BROADCAST | IFF_MULTICAST;
175 netdev->features = NETIF_F_LLTX | NETIF_F_SG | NETIF_F_FRAGLIST |
176 NETIF_F_HIGHDMA | NETIF_F_HW_CSUM | NETIF_F_TSO;
178 vport_gen_rand_ether_addr(netdev->dev_addr);
181 static struct vport *internal_dev_create(const struct vport_parms *parms)
184 struct netdev_vport *netdev_vport;
185 struct internal_dev *internal_dev;
188 vport = vport_alloc(sizeof(struct netdev_vport), &internal_vport_ops, parms);
190 err = PTR_ERR(vport);
194 netdev_vport = netdev_vport_priv(vport);
196 netdev_vport->dev = alloc_netdev(sizeof(struct internal_dev), parms->name, do_setup);
197 if (!netdev_vport->dev) {
199 goto error_free_vport;
202 internal_dev = internal_dev_priv(netdev_vport->dev);
203 rcu_assign_pointer(internal_dev->vport, vport);
205 err = register_netdevice(netdev_vport->dev);
207 goto error_free_netdev;
212 free_netdev(netdev_vport->dev);
219 static int internal_dev_destroy(struct vport *vport)
221 struct netdev_vport *netdev_vport = netdev_vport_priv(vport);
223 unregister_netdevice(netdev_vport->dev);
229 static int internal_dev_attach(struct vport *vport)
231 struct netdev_vport *netdev_vport = netdev_vport_priv(vport);
232 struct internal_dev *internal_dev = internal_dev_priv(netdev_vport->dev);
234 rcu_assign_pointer(internal_dev->attached_vport, internal_dev->vport);
235 dev_set_promiscuity(netdev_vport->dev, 1);
236 netif_start_queue(netdev_vport->dev);
241 static int internal_dev_detach(struct vport *vport)
243 struct netdev_vport *netdev_vport = netdev_vport_priv(vport);
244 struct internal_dev *internal_dev = internal_dev_priv(netdev_vport->dev);
246 netif_stop_queue(netdev_vport->dev);
247 dev_set_promiscuity(netdev_vport->dev, -1);
248 rcu_assign_pointer(internal_dev->attached_vport, NULL);
253 static int internal_dev_recv(struct vport *vport, struct sk_buff *skb)
255 struct net_device *netdev = netdev_vport_priv(vport)->dev;
260 skb->pkt_type = PACKET_HOST;
261 skb->protocol = eth_type_trans(skb, netdev);
268 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,29)
269 netdev->last_rx = jiffies;
275 const struct vport_ops internal_vport_ops = {
277 .flags = VPORT_F_REQUIRED | VPORT_F_GEN_STATS | VPORT_F_FLOW,
278 .create = internal_dev_create,
279 .destroy = internal_dev_destroy,
280 .attach = internal_dev_attach,
281 .detach = internal_dev_detach,
282 .set_mtu = netdev_set_mtu,
283 .set_addr = netdev_set_addr,
284 .get_name = netdev_get_name,
285 .get_addr = netdev_get_addr,
286 .get_kobj = netdev_get_kobj,
287 .get_dev_flags = netdev_get_dev_flags,
288 .is_running = netdev_is_running,
289 .get_operstate = netdev_get_operstate,
290 .get_ifindex = netdev_get_ifindex,
291 .get_iflink = netdev_get_iflink,
292 .get_mtu = netdev_get_mtu,
293 .send = internal_dev_recv,
296 int is_internal_dev(const struct net_device *netdev)
298 #ifdef HAVE_NET_DEVICE_OPS
299 return netdev->netdev_ops == &internal_dev_netdev_ops;
301 return netdev->open == internal_dev_open;
305 int is_internal_vport(const struct vport *vport)
307 return vport->ops == &internal_vport_ops;
310 struct vport *internal_dev_get_vport(struct net_device *netdev)
312 struct internal_dev *internal_dev;
314 if (!is_internal_dev(netdev))
317 internal_dev = internal_dev_priv(netdev);
318 return rcu_dereference(internal_dev->attached_vport);