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/percpu.h>
14 #include <linux/preempt.h>
15 #include <linux/rcupdate.h>
16 #include <linux/skbuff.h>
17 #include <linux/workqueue.h>
20 #include "vport-internal_dev.h"
21 #include "vport-netdev.h"
24 unsigned long rx_packets;
25 unsigned long rx_bytes;
26 unsigned long tx_packets;
27 unsigned long tx_bytes;
33 struct net_device_stats stats;
34 struct pcpu_lstats *lstats;
37 struct vport_ops internal_vport_ops;
39 static inline struct internal_dev *internal_dev_priv(struct net_device *netdev)
41 return netdev_priv(netdev);
44 static struct net_device_stats *internal_dev_get_stats(struct net_device *netdev)
46 struct internal_dev *internal_dev = internal_dev_priv(netdev);
47 struct net_device_stats *stats;
50 stats = &internal_dev->stats;
51 memset(stats, 0, sizeof(struct net_device_stats));
52 for_each_possible_cpu(i) {
53 const struct pcpu_lstats *lb_stats;
55 lb_stats = per_cpu_ptr(internal_dev->lstats, i);
56 stats->rx_bytes += lb_stats->rx_bytes;
57 stats->rx_packets += lb_stats->rx_packets;
58 stats->tx_bytes += lb_stats->tx_bytes;
59 stats->tx_packets += lb_stats->tx_packets;
64 static int internal_dev_mac_addr(struct net_device *dev, void *p)
66 struct sockaddr *addr = p;
68 if (!is_valid_ether_addr(addr->sa_data))
69 return -EADDRNOTAVAIL;
70 memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
74 /* Not reentrant (because it is called with BHs disabled), but may be called
75 * simultaneously on different CPUs. */
76 static int internal_dev_xmit(struct sk_buff *skb, struct net_device *netdev)
78 struct internal_dev *internal_dev = internal_dev_priv(netdev);
79 struct vport *vport = internal_dev_get_vport(netdev);
80 struct pcpu_lstats *lb_stats;
82 /* We need our own clone. */
83 skb = skb_share_check(skb, GFP_ATOMIC);
87 lb_stats = per_cpu_ptr(internal_dev->lstats, smp_processor_id());
88 lb_stats->tx_packets++;
89 lb_stats->tx_bytes += skb->len;
91 skb_reset_mac_header(skb);
93 vport_receive(vport, skb);
99 static int internal_dev_open(struct net_device *netdev)
101 netif_start_queue(netdev);
105 static int internal_dev_stop(struct net_device *netdev)
107 netif_stop_queue(netdev);
111 static void internal_dev_getinfo(struct net_device *netdev,
112 struct ethtool_drvinfo *info)
114 struct dp_port *dp_port = vport_get_dp_port(internal_dev_get_vport(netdev));
116 strcpy(info->driver, "openvswitch");
118 sprintf(info->bus_info, "%d.%d", dp_port->dp->dp_idx, dp_port->port_no);
121 static struct ethtool_ops internal_dev_ethtool_ops = {
122 .get_drvinfo = internal_dev_getinfo,
123 .get_link = ethtool_op_get_link,
124 .get_sg = ethtool_op_get_sg,
125 .get_tx_csum = ethtool_op_get_tx_csum,
126 .get_tso = ethtool_op_get_tso,
129 static int internal_dev_change_mtu(struct net_device *netdev, int new_mtu)
131 struct dp_port *dp_port = vport_get_dp_port(internal_dev_get_vport(netdev));
139 mutex_lock(&dp_port->dp->mutex);
140 min_mtu = dp_min_mtu(dp_port->dp);
141 mutex_unlock(&dp_port->dp->mutex);
143 if (new_mtu > min_mtu)
147 netdev->mtu = new_mtu;
151 static int internal_dev_init(struct net_device *netdev)
153 struct internal_dev *internal_dev = internal_dev_priv(netdev);
155 internal_dev->lstats = alloc_percpu(struct pcpu_lstats);
156 if (!internal_dev->lstats)
162 static void internal_dev_free(struct net_device *netdev)
164 struct internal_dev *internal_dev = internal_dev_priv(netdev);
166 free_percpu(internal_dev->lstats);
170 static int internal_dev_do_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
173 return dp_ioctl_hook(dev, ifr, cmd);
177 #ifdef HAVE_NET_DEVICE_OPS
178 static const struct net_device_ops internal_dev_netdev_ops = {
179 .ndo_init = internal_dev_init,
180 .ndo_open = internal_dev_open,
181 .ndo_stop = internal_dev_stop,
182 .ndo_start_xmit = internal_dev_xmit,
183 .ndo_set_mac_address = internal_dev_mac_addr,
184 .ndo_do_ioctl = internal_dev_do_ioctl,
185 .ndo_change_mtu = internal_dev_change_mtu,
186 .ndo_get_stats = internal_dev_get_stats,
191 do_setup(struct net_device *netdev)
195 #ifdef HAVE_NET_DEVICE_OPS
196 netdev->netdev_ops = &internal_dev_netdev_ops;
198 netdev->do_ioctl = internal_dev_do_ioctl;
199 netdev->get_stats = internal_dev_get_stats;
200 netdev->hard_start_xmit = internal_dev_xmit;
201 netdev->open = internal_dev_open;
202 netdev->stop = internal_dev_stop;
203 netdev->set_mac_address = internal_dev_mac_addr;
204 netdev->change_mtu = internal_dev_change_mtu;
205 netdev->init = internal_dev_init;
208 netdev->destructor = internal_dev_free;
209 SET_ETHTOOL_OPS(netdev, &internal_dev_ethtool_ops);
210 netdev->tx_queue_len = 0;
212 netdev->flags = IFF_BROADCAST | IFF_MULTICAST;
213 netdev->features = NETIF_F_LLTX; /* XXX other features? */
215 vport_gen_ether_addr(netdev->dev_addr);
218 static struct vport *
219 internal_dev_create(const char *name, const void __user *config)
222 struct netdev_vport *netdev_vport;
223 struct internal_dev *internal_dev;
226 vport = vport_alloc(sizeof(struct netdev_vport), &internal_vport_ops);
228 err = PTR_ERR(vport);
232 netdev_vport = netdev_vport_priv(vport);
234 netdev_vport->dev = alloc_netdev(sizeof(struct internal_dev), name, do_setup);
235 if (!netdev_vport->dev) {
237 goto error_free_vport;
240 internal_dev = internal_dev_priv(netdev_vport->dev);
241 internal_dev->vport = vport;
243 err = register_netdevice(netdev_vport->dev);
245 goto error_free_netdev;
250 free_netdev(netdev_vport->dev);
258 internal_dev_destroy(struct vport *vport)
260 struct netdev_vport *netdev_vport = netdev_vport_priv(vport);
262 unregister_netdevice(netdev_vport->dev);
269 internal_dev_attach(struct vport *vport)
271 struct netdev_vport *netdev_vport = netdev_vport_priv(vport);
273 dev_set_promiscuity(netdev_vport->dev, 1);
275 /* It would make sense to assign dev->br_port here too, but
276 * that causes packets received on internal ports to get caught
277 * in netdev_frame_hook(). In turn netdev_frame_hook() can reject them
278 * back to the network stack, but that's a waste of time. */
284 internal_dev_detach(struct vport *vport)
286 struct netdev_vport *netdev_vport = netdev_vport_priv(vport);
288 dev_set_promiscuity(netdev_vport->dev, -1);
290 /* Make sure that no packets arrive from now on, since
291 * internal_dev_xmit() will try to find itself through
292 * p->dp->ports[], and we're about to set that to null. */
293 netif_tx_disable(netdev_vport->dev);
299 internal_dev_recv(struct vport *vport, struct sk_buff *skb)
301 struct net_device *netdev = netdev_vport_priv(vport)->dev;
302 struct internal_dev *internal_dev = internal_dev_priv(netdev);
303 struct pcpu_lstats *lb_stats;
308 skb->pkt_type = PACKET_HOST;
309 skb->protocol = eth_type_trans(skb, netdev);
315 netdev->last_rx = jiffies;
318 lb_stats = per_cpu_ptr(internal_dev->lstats, smp_processor_id());
319 lb_stats->rx_packets++;
320 lb_stats->rx_bytes += len;
326 struct vport_ops internal_vport_ops = {
328 .flags = VPORT_F_REQUIRED,
329 .create = internal_dev_create,
330 .destroy = internal_dev_destroy,
331 .attach = internal_dev_attach,
332 .detach = internal_dev_detach,
333 .set_mtu = netdev_set_mtu,
334 .set_addr = netdev_set_addr,
335 .get_name = netdev_get_name,
336 .get_addr = netdev_get_addr,
337 .get_kobj = netdev_get_kobj,
338 .get_stats = netdev_get_stats,
339 .get_dev_flags = netdev_get_dev_flags,
340 .is_running = netdev_is_running,
341 .get_operstate = netdev_get_operstate,
342 .get_ifindex = netdev_get_ifindex,
343 .get_iflink = netdev_get_iflink,
344 .get_mtu = netdev_get_mtu,
345 .send = internal_dev_recv,
348 int is_internal_dev(const struct net_device *netdev)
350 #ifdef HAVE_NET_DEVICE_OPS
351 return netdev->netdev_ops == &internal_dev_netdev_ops;
353 return netdev->open == internal_dev_open;
358 is_internal_vport(const struct vport *vport)
360 return vport->ops == &internal_vport_ops;
364 internal_dev_get_vport(struct net_device *netdev)
366 struct internal_dev *internal_dev = internal_dev_priv(netdev);
367 return rcu_dereference(internal_dev->vport);