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/netdev_features.h>
26 #include <linux/skbuff.h>
27 #include <linux/version.h>
34 #include "vport-internal_dev.h"
35 #include "vport-netdev.h"
37 #if LINUX_VERSION_CODE >= KERNEL_VERSION(3,1,0)
38 #define HAVE_NET_DEVICE_OPS
45 static struct internal_dev *internal_dev_priv(struct net_device *netdev)
47 return netdev_priv(netdev);
50 /* This function is only called by the kernel network layer.*/
51 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,36)
52 static struct rtnl_link_stats64 *internal_dev_get_stats(struct net_device *netdev,
53 struct rtnl_link_stats64 *stats)
56 static struct net_device_stats *internal_dev_sys_stats(struct net_device *netdev)
58 struct net_device_stats *stats = &netdev->stats;
60 struct vport *vport = ovs_internal_dev_get_vport(netdev);
61 struct ovs_vport_stats vport_stats;
63 ovs_vport_get_stats(vport, &vport_stats);
65 /* The tx and rx stats need to be swapped because the
66 * switch and host OS have opposite perspectives. */
67 stats->rx_packets = vport_stats.tx_packets;
68 stats->tx_packets = vport_stats.rx_packets;
69 stats->rx_bytes = vport_stats.tx_bytes;
70 stats->tx_bytes = vport_stats.rx_bytes;
71 stats->rx_errors = vport_stats.tx_errors;
72 stats->tx_errors = vport_stats.rx_errors;
73 stats->rx_dropped = vport_stats.tx_dropped;
74 stats->tx_dropped = vport_stats.rx_dropped;
79 /* Called with rcu_read_lock_bh. */
80 static int internal_dev_xmit(struct sk_buff *skb, struct net_device *netdev)
83 ovs_vport_receive(internal_dev_priv(netdev)->vport, skb, NULL);
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 strlcpy(info->driver, "openvswitch", sizeof(info->driver));
106 static const struct ethtool_ops internal_dev_ethtool_ops = {
107 .get_drvinfo = internal_dev_getinfo,
108 .get_link = ethtool_op_get_link,
109 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,39)
110 .get_sg = ethtool_op_get_sg,
111 .set_sg = ethtool_op_set_sg,
112 .get_tx_csum = ethtool_op_get_tx_csum,
113 .set_tx_csum = ethtool_op_set_tx_hw_csum,
114 .get_tso = ethtool_op_get_tso,
115 .set_tso = ethtool_op_set_tso,
119 static int internal_dev_change_mtu(struct net_device *netdev, int new_mtu)
124 netdev->mtu = new_mtu;
128 static void internal_dev_destructor(struct net_device *dev)
130 struct vport *vport = ovs_internal_dev_get_vport(dev);
132 ovs_vport_free(vport);
136 #ifdef HAVE_NET_DEVICE_OPS
137 static const struct net_device_ops internal_dev_netdev_ops = {
138 .ndo_open = internal_dev_open,
139 .ndo_stop = internal_dev_stop,
140 .ndo_start_xmit = internal_dev_xmit,
141 .ndo_set_mac_address = eth_mac_addr,
142 .ndo_change_mtu = internal_dev_change_mtu,
143 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,36)
144 .ndo_get_stats64 = internal_dev_get_stats,
146 .ndo_get_stats = internal_dev_sys_stats,
151 static void do_setup(struct net_device *netdev)
155 #ifdef HAVE_NET_DEVICE_OPS
156 netdev->netdev_ops = &internal_dev_netdev_ops;
158 netdev->get_stats = internal_dev_sys_stats;
159 netdev->hard_start_xmit = internal_dev_xmit;
160 netdev->open = internal_dev_open;
161 netdev->stop = internal_dev_stop;
162 netdev->set_mac_address = eth_mac_addr;
163 netdev->change_mtu = internal_dev_change_mtu;
166 netdev->priv_flags &= ~IFF_TX_SKB_SHARING;
167 netdev->priv_flags |= IFF_LIVE_ADDR_CHANGE;
168 netdev->destructor = internal_dev_destructor;
169 SET_ETHTOOL_OPS(netdev, &internal_dev_ethtool_ops);
170 netdev->tx_queue_len = 0;
172 netdev->features = NETIF_F_LLTX | NETIF_F_SG | NETIF_F_FRAGLIST |
173 NETIF_F_HIGHDMA | NETIF_F_HW_CSUM | NETIF_F_TSO;
175 netdev->vlan_features = netdev->features;
176 netdev->features |= NETIF_F_HW_VLAN_CTAG_TX;
178 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,39)
179 netdev->hw_features = netdev->features & ~NETIF_F_LLTX;
181 eth_hw_addr_random(netdev);
184 static struct vport *internal_dev_create(const struct vport_parms *parms)
187 struct netdev_vport *netdev_vport;
188 struct internal_dev *internal_dev;
191 vport = ovs_vport_alloc(sizeof(struct netdev_vport),
192 &ovs_internal_vport_ops, parms);
194 err = PTR_ERR(vport);
198 netdev_vport = netdev_vport_priv(vport);
200 netdev_vport->dev = alloc_netdev(sizeof(struct internal_dev),
201 parms->name, do_setup);
202 if (!netdev_vport->dev) {
204 goto error_free_vport;
207 dev_net_set(netdev_vport->dev, ovs_dp_get_net(vport->dp));
208 internal_dev = internal_dev_priv(netdev_vport->dev);
209 internal_dev->vport = vport;
211 /* Restrict bridge port to current netns. */
212 if (vport->port_no == OVSP_LOCAL)
213 netdev_vport->dev->features |= NETIF_F_NETNS_LOCAL;
216 err = register_netdevice(netdev_vport->dev);
218 goto error_free_netdev;
220 dev_set_promiscuity(netdev_vport->dev, 1);
222 netif_start_queue(netdev_vport->dev);
228 free_netdev(netdev_vport->dev);
230 ovs_vport_free(vport);
235 static void internal_dev_destroy(struct vport *vport)
237 struct netdev_vport *netdev_vport = netdev_vport_priv(vport);
239 netif_stop_queue(netdev_vport->dev);
241 dev_set_promiscuity(netdev_vport->dev, -1);
243 /* unregister_netdevice() waits for an RCU grace period. */
244 unregister_netdevice(netdev_vport->dev);
249 static int internal_dev_recv(struct vport *vport, struct sk_buff *skb)
251 struct net_device *netdev = netdev_vport_priv(vport)->dev;
254 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,37)
255 if (vlan_tx_tag_present(skb)) {
256 if (unlikely(!__vlan_put_tag(skb,
258 vlan_tx_tag_get(skb))))
261 if (skb->ip_summed == CHECKSUM_COMPLETE)
262 skb->csum = csum_add(skb->csum,
263 csum_partial(skb->data + (2 * ETH_ALEN),
266 vlan_set_tci(skb, 0);
277 skb->pkt_type = PACKET_HOST;
278 skb->protocol = eth_type_trans(skb, netdev);
279 skb_postpull_rcsum(skb, eth_hdr(skb), ETH_HLEN);
286 const struct vport_ops ovs_internal_vport_ops = {
287 .type = OVS_VPORT_TYPE_INTERNAL,
288 .create = internal_dev_create,
289 .destroy = internal_dev_destroy,
290 .get_name = ovs_netdev_get_name,
291 .send = internal_dev_recv,
294 int ovs_is_internal_dev(const struct net_device *netdev)
296 #ifdef HAVE_NET_DEVICE_OPS
297 return netdev->netdev_ops == &internal_dev_netdev_ops;
299 return netdev->open == internal_dev_open;
303 struct vport *ovs_internal_dev_get_vport(struct net_device *netdev)
305 if (!ovs_is_internal_dev(netdev))
308 return internal_dev_priv(netdev)->vport;