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"
41 static struct vport_ops ovs_internal_vport_ops;
43 static struct internal_dev *internal_dev_priv(struct net_device *netdev)
45 return netdev_priv(netdev);
48 /* This function is only called by the kernel network layer.*/
49 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,36)
50 static struct rtnl_link_stats64 *internal_dev_get_stats(struct net_device *netdev,
51 struct rtnl_link_stats64 *stats)
54 static struct net_device_stats *internal_dev_sys_stats(struct net_device *netdev)
56 struct net_device_stats *stats = &netdev->stats;
58 struct vport *vport = ovs_internal_dev_get_vport(netdev);
59 struct ovs_vport_stats vport_stats;
61 ovs_vport_get_stats(vport, &vport_stats);
63 /* The tx and rx stats need to be swapped because the
64 * switch and host OS have opposite perspectives.
66 stats->rx_packets = vport_stats.tx_packets;
67 stats->tx_packets = vport_stats.rx_packets;
68 stats->rx_bytes = vport_stats.tx_bytes;
69 stats->tx_bytes = vport_stats.rx_bytes;
70 stats->rx_errors = vport_stats.tx_errors;
71 stats->tx_errors = vport_stats.rx_errors;
72 stats->rx_dropped = vport_stats.tx_dropped;
73 stats->tx_dropped = vport_stats.rx_dropped;
78 /* Called with rcu_read_lock_bh. */
79 static int internal_dev_xmit(struct sk_buff *skb, struct net_device *netdev)
82 ovs_vport_receive(internal_dev_priv(netdev)->vport, skb, NULL);
87 static int internal_dev_open(struct net_device *netdev)
89 netif_start_queue(netdev);
93 static int internal_dev_stop(struct net_device *netdev)
95 netif_stop_queue(netdev);
99 static void internal_dev_getinfo(struct net_device *netdev,
100 struct ethtool_drvinfo *info)
102 strlcpy(info->driver, "openvswitch", sizeof(info->driver));
105 static const struct ethtool_ops internal_dev_ethtool_ops = {
106 .get_drvinfo = internal_dev_getinfo,
107 .get_link = ethtool_op_get_link,
108 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,39)
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,
118 static int internal_dev_change_mtu(struct net_device *netdev, int new_mtu)
123 netdev->mtu = new_mtu;
127 static void internal_dev_destructor(struct net_device *dev)
129 struct vport *vport = ovs_internal_dev_get_vport(dev);
131 ovs_vport_free(vport);
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 = eth_mac_addr,
140 .ndo_change_mtu = internal_dev_change_mtu,
141 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,36)
142 .ndo_get_stats64 = internal_dev_get_stats,
144 .ndo_get_stats = internal_dev_sys_stats,
148 static struct rtnl_link_ops internal_dev_link_ops __read_mostly = {
149 .kind = "openvswitch",
152 static void do_setup(struct net_device *netdev)
156 netdev->netdev_ops = &internal_dev_netdev_ops;
158 netdev->priv_flags &= ~IFF_TX_SKB_SHARING;
159 netdev->priv_flags |= IFF_LIVE_ADDR_CHANGE;
160 netdev->destructor = internal_dev_destructor;
161 netdev->ethtool_ops = &internal_dev_ethtool_ops;
162 netdev->rtnl_link_ops = &internal_dev_link_ops;
163 netdev->tx_queue_len = 0;
165 netdev->features = NETIF_F_LLTX | NETIF_F_SG | NETIF_F_FRAGLIST |
166 NETIF_F_HIGHDMA | NETIF_F_HW_CSUM |
167 NETIF_F_GSO_SOFTWARE | NETIF_F_GSO_ENCAP_ALL;
169 netdev->vlan_features = netdev->features;
170 netdev->features |= NETIF_F_HW_VLAN_CTAG_TX;
172 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,39)
173 netdev->hw_features = netdev->features & ~NETIF_F_LLTX;
176 #if LINUX_VERSION_CODE >= KERNEL_VERSION(3,8,0)
177 netdev->hw_enc_features = netdev->features;
180 eth_hw_addr_random(netdev);
183 static struct vport *internal_dev_create(const struct vport_parms *parms)
186 struct netdev_vport *netdev_vport;
187 struct internal_dev *internal_dev;
190 vport = ovs_vport_alloc(sizeof(struct netdev_vport),
191 &ovs_internal_vport_ops, parms);
193 err = PTR_ERR(vport);
197 netdev_vport = netdev_vport_priv(vport);
199 netdev_vport->dev = alloc_netdev(sizeof(struct internal_dev),
200 parms->name, NET_NAME_UNKNOWN, do_setup);
201 if (!netdev_vport->dev) {
203 goto error_free_vport;
206 dev_net_set(netdev_vport->dev, ovs_dp_get_net(vport->dp));
207 internal_dev = internal_dev_priv(netdev_vport->dev);
208 internal_dev->vport = vport;
210 /* Restrict bridge port to current netns. */
211 if (vport->port_no == OVSP_LOCAL)
212 netdev_vport->dev->features |= NETIF_F_NETNS_LOCAL;
215 err = register_netdevice(netdev_vport->dev);
217 goto error_free_netdev;
219 dev_set_promiscuity(netdev_vport->dev, 1);
221 netif_start_queue(netdev_vport->dev);
227 free_netdev(netdev_vport->dev);
229 ovs_vport_free(vport);
234 static void internal_dev_destroy(struct vport *vport)
236 struct netdev_vport *netdev_vport = netdev_vport_priv(vport);
238 netif_stop_queue(netdev_vport->dev);
240 dev_set_promiscuity(netdev_vport->dev, -1);
242 /* unregister_netdevice() waits for an RCU grace period. */
243 unregister_netdevice(netdev_vport->dev);
248 static int internal_dev_recv(struct vport *vport, struct sk_buff *skb)
250 struct net_device *netdev = netdev_vport_priv(vport)->dev;
253 if (unlikely(!(netdev->flags & IFF_UP))) {
258 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,37)
259 if (skb_vlan_tag_present(skb)) {
260 if (unlikely(!vlan_insert_tag_set_proto(skb,
262 skb_vlan_tag_get(skb))))
265 if (skb->ip_summed == CHECKSUM_COMPLETE)
266 skb->csum = csum_add(skb->csum,
267 csum_partial(skb->data + (2 * ETH_ALEN),
270 vlan_set_tci(skb, 0);
281 skb->pkt_type = PACKET_HOST;
282 skb->protocol = eth_type_trans(skb, netdev);
283 skb_postpull_rcsum(skb, eth_hdr(skb), ETH_HLEN);
290 static struct vport_ops ovs_internal_vport_ops = {
291 .type = OVS_VPORT_TYPE_INTERNAL,
292 .create = internal_dev_create,
293 .destroy = internal_dev_destroy,
294 .get_name = ovs_netdev_get_name,
295 .send = internal_dev_recv,
298 int ovs_is_internal_dev(const struct net_device *netdev)
300 return netdev->netdev_ops == &internal_dev_netdev_ops;
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;
311 int ovs_internal_dev_rtnl_link_register(void)
315 err = rtnl_link_register(&internal_dev_link_ops);
319 err = ovs_vport_ops_register(&ovs_internal_vport_ops);
321 rtnl_link_unregister(&internal_dev_link_ops);
326 void ovs_internal_dev_rtnl_link_unregister(void)
328 ovs_vport_ops_unregister(&ovs_internal_vport_ops);
329 rtnl_link_unregister(&internal_dev_link_ops);