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/kernel.h>
10 #include <linux/netdevice.h>
11 #include <linux/etherdevice.h>
12 #include <linux/ethtool.h>
13 #include <linux/skbuff.h>
14 #include <linux/version.h>
19 #include "vport-generic.h"
20 #include "vport-internal_dev.h"
21 #include "vport-netdev.h"
25 struct net_device_stats stats;
28 static inline struct internal_dev *internal_dev_priv(struct net_device *netdev)
30 return netdev_priv(netdev);
33 /* This function is only called by the kernel network layer. It is not a vport
34 * get_stats() function. If a vport get_stats() function is defined that
35 * results in this being called it will cause infinite recursion. */
36 static struct net_device_stats *internal_dev_sys_stats(struct net_device *netdev)
38 struct vport *vport = internal_dev_get_vport(netdev);
39 struct net_device_stats *stats = &internal_dev_priv(netdev)->stats;
42 struct rtnl_link_stats64 vport_stats;
44 vport_get_stats(vport, &vport_stats);
46 /* The tx and rx stats need to be swapped because the switch
47 * and host OS have opposite perspectives. */
48 stats->rx_packets = vport_stats.tx_packets;
49 stats->tx_packets = vport_stats.rx_packets;
50 stats->rx_bytes = vport_stats.tx_bytes;
51 stats->tx_bytes = vport_stats.rx_bytes;
52 stats->rx_errors = vport_stats.tx_errors;
53 stats->tx_errors = vport_stats.rx_errors;
54 stats->rx_dropped = vport_stats.tx_dropped;
55 stats->tx_dropped = vport_stats.rx_dropped;
56 stats->collisions = vport_stats.collisions;
62 static int internal_dev_mac_addr(struct net_device *dev, void *p)
64 struct sockaddr *addr = p;
66 if (!is_valid_ether_addr(addr->sa_data))
67 return -EADDRNOTAVAIL;
68 memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
72 /* Called with rcu_read_lock and bottom-halves disabled. */
73 static int internal_dev_xmit(struct sk_buff *skb, struct net_device *netdev)
75 compute_ip_summed(skb, true);
76 vlan_copy_skb_tci(skb);
77 OVS_CB(skb)->flow = NULL;
79 vport_receive(internal_dev_priv(netdev)->vport, skb);
83 static int internal_dev_open(struct net_device *netdev)
85 netif_start_queue(netdev);
89 static int internal_dev_stop(struct net_device *netdev)
91 netif_stop_queue(netdev);
95 static void internal_dev_getinfo(struct net_device *netdev,
96 struct ethtool_drvinfo *info)
98 strcpy(info->driver, "openvswitch");
101 static const struct ethtool_ops internal_dev_ethtool_ops = {
102 .get_drvinfo = internal_dev_getinfo,
103 .get_link = ethtool_op_get_link,
104 .get_sg = ethtool_op_get_sg,
105 .set_sg = ethtool_op_set_sg,
106 .get_tx_csum = ethtool_op_get_tx_csum,
107 .set_tx_csum = ethtool_op_set_tx_hw_csum,
108 .get_tso = ethtool_op_get_tso,
109 .set_tso = ethtool_op_set_tso,
112 static int internal_dev_change_mtu(struct net_device *netdev, int new_mtu)
114 struct vport *vport = internal_dev_get_vport(netdev);
119 if (new_mtu > dp_min_mtu(vport->dp))
122 netdev->mtu = new_mtu;
126 static int internal_dev_do_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
129 return dp_ioctl_hook(dev, ifr, cmd);
134 #ifdef HAVE_NET_DEVICE_OPS
135 static const struct net_device_ops internal_dev_netdev_ops = {
136 .ndo_open = internal_dev_open,
137 .ndo_stop = internal_dev_stop,
138 .ndo_start_xmit = internal_dev_xmit,
139 .ndo_set_mac_address = internal_dev_mac_addr,
140 .ndo_do_ioctl = internal_dev_do_ioctl,
141 .ndo_change_mtu = internal_dev_change_mtu,
142 .ndo_get_stats = internal_dev_sys_stats,
146 static void do_setup(struct net_device *netdev)
150 #ifdef HAVE_NET_DEVICE_OPS
151 netdev->netdev_ops = &internal_dev_netdev_ops;
153 netdev->do_ioctl = internal_dev_do_ioctl;
154 netdev->get_stats = internal_dev_sys_stats;
155 netdev->hard_start_xmit = internal_dev_xmit;
156 netdev->open = internal_dev_open;
157 netdev->stop = internal_dev_stop;
158 netdev->set_mac_address = internal_dev_mac_addr;
159 netdev->change_mtu = internal_dev_change_mtu;
162 netdev->destructor = free_netdev;
163 SET_ETHTOOL_OPS(netdev, &internal_dev_ethtool_ops);
164 netdev->tx_queue_len = 0;
166 netdev->flags = IFF_BROADCAST | IFF_MULTICAST;
167 netdev->features = NETIF_F_LLTX | NETIF_F_SG | NETIF_F_FRAGLIST |
168 NETIF_F_HIGHDMA | NETIF_F_HW_CSUM | NETIF_F_TSO;
170 vport_gen_rand_ether_addr(netdev->dev_addr);
173 static struct vport *internal_dev_create(const struct vport_parms *parms)
176 struct netdev_vport *netdev_vport;
177 struct internal_dev *internal_dev;
180 vport = vport_alloc(sizeof(struct netdev_vport), &internal_vport_ops, parms);
182 err = PTR_ERR(vport);
186 netdev_vport = netdev_vport_priv(vport);
188 netdev_vport->dev = alloc_netdev(sizeof(struct internal_dev), parms->name, do_setup);
189 if (!netdev_vport->dev) {
191 goto error_free_vport;
194 internal_dev = internal_dev_priv(netdev_vport->dev);
195 internal_dev->vport = vport;
197 err = register_netdevice(netdev_vport->dev);
199 goto error_free_netdev;
201 dev_set_promiscuity(netdev_vport->dev, 1);
202 netif_start_queue(netdev_vport->dev);
207 free_netdev(netdev_vport->dev);
214 static int internal_dev_destroy(struct vport *vport)
216 struct netdev_vport *netdev_vport = netdev_vport_priv(vport);
218 netif_stop_queue(netdev_vport->dev);
219 dev_set_promiscuity(netdev_vport->dev, -1);
221 unregister_netdevice(netdev_vport->dev);
222 /* unregister_netdevice() waits for an RCU grace period. */
228 static int internal_dev_recv(struct vport *vport, struct sk_buff *skb)
230 struct net_device *netdev = netdev_vport_priv(vport)->dev;
235 skb->pkt_type = PACKET_HOST;
236 skb->protocol = eth_type_trans(skb, netdev);
243 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,29)
244 netdev->last_rx = jiffies;
250 const struct vport_ops internal_vport_ops = {
251 .type = ODP_VPORT_TYPE_INTERNAL,
252 .flags = VPORT_F_REQUIRED | VPORT_F_GEN_STATS | VPORT_F_FLOW,
253 .create = internal_dev_create,
254 .destroy = internal_dev_destroy,
255 .set_mtu = netdev_set_mtu,
256 .set_addr = netdev_set_addr,
257 .get_name = netdev_get_name,
258 .get_addr = netdev_get_addr,
259 .get_kobj = netdev_get_kobj,
260 .get_dev_flags = netdev_get_dev_flags,
261 .is_running = netdev_is_running,
262 .get_operstate = netdev_get_operstate,
263 .get_ifindex = netdev_get_ifindex,
264 .get_iflink = netdev_get_iflink,
265 .get_mtu = netdev_get_mtu,
266 .send = internal_dev_recv,
269 int is_internal_dev(const struct net_device *netdev)
271 #ifdef HAVE_NET_DEVICE_OPS
272 return netdev->netdev_ops == &internal_dev_netdev_ops;
274 return netdev->open == internal_dev_open;
278 int is_internal_vport(const struct vport *vport)
280 return vport->ops == &internal_vport_ops;
283 struct vport *internal_dev_get_vport(struct net_device *netdev)
285 if (!is_internal_dev(netdev))
288 return internal_dev_priv(netdev)->vport;