2 * Copyright (c) 2009, 2010, 2011 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/if_vlan.h>
10 #include <linux/kernel.h>
11 #include <linux/netdevice.h>
12 #include <linux/etherdevice.h>
13 #include <linux/ethtool.h>
14 #include <linux/skbuff.h>
15 #include <linux/version.h>
20 #include "vport-generic.h"
21 #include "vport-internal_dev.h"
22 #include "vport-netdev.h"
26 struct net_device_stats stats;
29 static inline struct internal_dev *internal_dev_priv(struct net_device *netdev)
31 return netdev_priv(netdev);
34 /* This function is only called by the kernel network layer. It is not a vport
35 * get_stats() function. If a vport get_stats() function is defined that
36 * results in this being called it will cause infinite recursion. */
37 static struct net_device_stats *internal_dev_sys_stats(struct net_device *netdev)
39 struct vport *vport = internal_dev_get_vport(netdev);
40 struct net_device_stats *stats = &internal_dev_priv(netdev)->stats;
43 struct rtnl_link_stats64 vport_stats;
45 vport_get_stats(vport, &vport_stats);
47 /* The tx and rx stats need to be swapped because the switch
48 * and host OS have opposite perspectives. */
49 stats->rx_packets = vport_stats.tx_packets;
50 stats->tx_packets = vport_stats.rx_packets;
51 stats->rx_bytes = vport_stats.tx_bytes;
52 stats->tx_bytes = vport_stats.rx_bytes;
53 stats->rx_errors = vport_stats.tx_errors;
54 stats->tx_errors = vport_stats.rx_errors;
55 stats->rx_dropped = vport_stats.tx_dropped;
56 stats->tx_dropped = vport_stats.rx_dropped;
57 stats->collisions = vport_stats.collisions;
63 static int internal_dev_mac_addr(struct net_device *dev, void *p)
65 struct sockaddr *addr = p;
67 if (!is_valid_ether_addr(addr->sa_data))
68 return -EADDRNOTAVAIL;
69 memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
73 /* Called with rcu_read_lock and bottom-halves disabled. */
74 static int internal_dev_xmit(struct sk_buff *skb, struct net_device *netdev)
76 if (unlikely(compute_ip_summed(skb, true))) {
81 vlan_copy_skb_tci(skb);
82 OVS_CB(skb)->flow = NULL;
84 vport_receive(internal_dev_priv(netdev)->vport, skb);
88 static int internal_dev_open(struct net_device *netdev)
90 netif_start_queue(netdev);
94 static int internal_dev_stop(struct net_device *netdev)
96 netif_stop_queue(netdev);
100 static void internal_dev_getinfo(struct net_device *netdev,
101 struct ethtool_drvinfo *info)
103 strcpy(info->driver, "openvswitch");
106 static const struct ethtool_ops internal_dev_ethtool_ops = {
107 .get_drvinfo = internal_dev_getinfo,
108 .get_link = ethtool_op_get_link,
109 .get_sg = ethtool_op_get_sg,
110 .set_sg = ethtool_op_set_sg,
111 .get_tx_csum = ethtool_op_get_tx_csum,
112 .set_tx_csum = ethtool_op_set_tx_hw_csum,
113 .get_tso = ethtool_op_get_tso,
114 .set_tso = ethtool_op_set_tso,
117 static int internal_dev_change_mtu(struct net_device *netdev, int new_mtu)
119 struct vport *vport = internal_dev_get_vport(netdev);
124 if (new_mtu > dp_min_mtu(vport->dp))
127 netdev->mtu = new_mtu;
131 static int internal_dev_do_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
134 return dp_ioctl_hook(dev, ifr, cmd);
139 static void internal_dev_destructor(struct net_device *dev)
141 struct vport *vport = internal_dev_get_vport(dev);
147 #ifdef HAVE_NET_DEVICE_OPS
148 static const struct net_device_ops internal_dev_netdev_ops = {
149 .ndo_open = internal_dev_open,
150 .ndo_stop = internal_dev_stop,
151 .ndo_start_xmit = internal_dev_xmit,
152 .ndo_set_mac_address = internal_dev_mac_addr,
153 .ndo_do_ioctl = internal_dev_do_ioctl,
154 .ndo_change_mtu = internal_dev_change_mtu,
155 .ndo_get_stats = internal_dev_sys_stats,
159 static void do_setup(struct net_device *netdev)
163 #ifdef HAVE_NET_DEVICE_OPS
164 netdev->netdev_ops = &internal_dev_netdev_ops;
166 netdev->do_ioctl = internal_dev_do_ioctl;
167 netdev->get_stats = internal_dev_sys_stats;
168 netdev->hard_start_xmit = internal_dev_xmit;
169 netdev->open = internal_dev_open;
170 netdev->stop = internal_dev_stop;
171 netdev->set_mac_address = internal_dev_mac_addr;
172 netdev->change_mtu = internal_dev_change_mtu;
175 netdev->destructor = internal_dev_destructor;
176 SET_ETHTOOL_OPS(netdev, &internal_dev_ethtool_ops);
177 netdev->tx_queue_len = 0;
179 netdev->flags = IFF_BROADCAST | IFF_MULTICAST;
180 netdev->features = NETIF_F_LLTX | NETIF_F_SG | NETIF_F_FRAGLIST |
181 NETIF_F_HIGHDMA | NETIF_F_HW_CSUM | NETIF_F_TSO;
183 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,27)
184 netdev->vlan_features = netdev->features;
185 netdev->features |= NETIF_F_HW_VLAN_TX;
188 vport_gen_rand_ether_addr(netdev->dev_addr);
191 static struct vport *internal_dev_create(const struct vport_parms *parms)
194 struct netdev_vport *netdev_vport;
195 struct internal_dev *internal_dev;
198 vport = vport_alloc(sizeof(struct netdev_vport), &internal_vport_ops, parms);
200 err = PTR_ERR(vport);
204 netdev_vport = netdev_vport_priv(vport);
206 netdev_vport->dev = alloc_netdev(sizeof(struct internal_dev), parms->name, do_setup);
207 if (!netdev_vport->dev) {
209 goto error_free_vport;
212 internal_dev = internal_dev_priv(netdev_vport->dev);
213 internal_dev->vport = vport;
215 err = register_netdevice(netdev_vport->dev);
217 goto error_free_netdev;
219 dev_set_promiscuity(netdev_vport->dev, 1);
220 netif_start_queue(netdev_vport->dev);
225 free_netdev(netdev_vport->dev);
232 static int internal_dev_destroy(struct vport *vport)
234 struct netdev_vport *netdev_vport = netdev_vport_priv(vport);
236 netif_stop_queue(netdev_vport->dev);
237 dev_set_promiscuity(netdev_vport->dev, -1);
239 /* unregister_netdevice() waits for an RCU grace period. */
240 unregister_netdevice(netdev_vport->dev);
245 static int internal_dev_recv(struct vport *vport, struct sk_buff *skb)
247 struct net_device *netdev = netdev_vport_priv(vport)->dev;
250 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,37)
251 if (unlikely(vlan_deaccel_tag(skb)))
257 skb->pkt_type = PACKET_HOST;
258 skb->protocol = eth_type_trans(skb, netdev);
259 forward_ip_summed(skb, false);
266 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,29)
267 netdev->last_rx = jiffies;
273 const struct vport_ops internal_vport_ops = {
274 .type = ODP_VPORT_TYPE_INTERNAL,
275 .flags = VPORT_F_REQUIRED | VPORT_F_GEN_STATS | VPORT_F_FLOW,
276 .create = internal_dev_create,
277 .destroy = internal_dev_destroy,
278 .set_mtu = netdev_set_mtu,
279 .set_addr = netdev_set_addr,
280 .get_name = netdev_get_name,
281 .get_addr = netdev_get_addr,
282 .get_kobj = netdev_get_kobj,
283 .get_dev_flags = netdev_get_dev_flags,
284 .is_running = netdev_is_running,
285 .get_operstate = netdev_get_operstate,
286 .get_ifindex = netdev_get_ifindex,
287 .get_iflink = netdev_get_iflink,
288 .get_mtu = netdev_get_mtu,
289 .send = internal_dev_recv,
292 int is_internal_dev(const struct net_device *netdev)
294 #ifdef HAVE_NET_DEVICE_OPS
295 return netdev->netdev_ops == &internal_dev_netdev_ops;
297 return netdev->open == internal_dev_open;
301 int is_internal_vport(const struct vport *vport)
303 return vport->ops == &internal_vport_ops;
306 struct vport *internal_dev_get_vport(struct net_device *netdev)
308 if (!is_internal_dev(netdev))
311 return internal_dev_priv(netdev)->vport;