2 * Copyright (c) 2007-2015 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/skbuff.h>
26 #include <linux/percpu.h>
27 #include <linux/u64_stats_sync.h>
28 #include <linux/netdev_features.h>
32 #include <net/rtnetlink.h>
35 #include "vport-internal_dev.h"
36 #include "vport-netdev.h"
42 static struct vport_ops ovs_internal_vport_ops;
44 static struct internal_dev *internal_dev_priv(struct net_device *netdev)
46 return netdev_priv(netdev);
49 /* Called with rcu_read_lock_bh. */
50 static int internal_dev_xmit(struct sk_buff *skb, struct net_device *netdev)
56 err = ovs_vport_receive(internal_dev_priv(netdev)->vport, skb, NULL);
60 #ifdef HAVE_DEV_TSTATS
61 struct pcpu_sw_netstats *tstats;
63 tstats = this_cpu_ptr((struct pcpu_sw_netstats __percpu *)netdev->tstats);
65 u64_stats_update_begin(&tstats->syncp);
66 tstats->tx_bytes += len;
68 u64_stats_update_end(&tstats->syncp);
71 netdev->stats.tx_errors++;
76 static int internal_dev_open(struct net_device *netdev)
78 netif_start_queue(netdev);
82 static int internal_dev_stop(struct net_device *netdev)
84 netif_stop_queue(netdev);
88 static void internal_dev_getinfo(struct net_device *netdev,
89 struct ethtool_drvinfo *info)
91 strlcpy(info->driver, "openvswitch", sizeof(info->driver));
94 static const struct ethtool_ops internal_dev_ethtool_ops = {
95 .get_drvinfo = internal_dev_getinfo,
96 .get_link = ethtool_op_get_link,
97 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,39)
98 .get_sg = ethtool_op_get_sg,
99 .set_sg = ethtool_op_set_sg,
100 .get_tx_csum = ethtool_op_get_tx_csum,
101 .set_tx_csum = ethtool_op_set_tx_hw_csum,
102 .get_tso = ethtool_op_get_tso,
103 .set_tso = ethtool_op_set_tso,
107 static int internal_dev_change_mtu(struct net_device *netdev, int new_mtu)
112 netdev->mtu = new_mtu;
116 static void internal_dev_destructor(struct net_device *dev)
118 struct vport *vport = ovs_internal_dev_get_vport(dev);
120 ovs_vport_free(vport);
124 #ifdef HAVE_DEV_TSTATS
125 static int internal_dev_init(struct net_device *dev)
127 dev->tstats = (typeof(dev->tstats)) netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
133 static void internal_dev_uninit(struct net_device *dev)
135 free_percpu(dev->tstats);
139 static const struct net_device_ops internal_dev_netdev_ops = {
140 #ifdef HAVE_DEV_TSTATS
141 .ndo_init = internal_dev_init,
142 .ndo_uninit = internal_dev_uninit,
143 .ndo_get_stats64 = ip_tunnel_get_stats64,
145 .ndo_open = internal_dev_open,
146 .ndo_stop = internal_dev_stop,
147 .ndo_start_xmit = internal_dev_xmit,
148 .ndo_set_mac_address = eth_mac_addr,
149 .ndo_change_mtu = internal_dev_change_mtu,
152 static struct rtnl_link_ops internal_dev_link_ops __read_mostly = {
153 .kind = "openvswitch",
156 static void do_setup(struct net_device *netdev)
160 netdev->netdev_ops = &internal_dev_netdev_ops;
162 netdev->priv_flags &= ~IFF_TX_SKB_SHARING;
163 netdev->priv_flags |= IFF_LIVE_ADDR_CHANGE | IFF_OPENVSWITCH;
164 netdev->destructor = internal_dev_destructor;
165 netdev->ethtool_ops = &internal_dev_ethtool_ops;
166 netdev->rtnl_link_ops = &internal_dev_link_ops;
167 netdev->tx_queue_len = 0;
169 netdev->features = NETIF_F_LLTX | NETIF_F_SG | NETIF_F_FRAGLIST |
170 NETIF_F_HIGHDMA | NETIF_F_HW_CSUM |
171 NETIF_F_GSO_SOFTWARE | NETIF_F_GSO_ENCAP_ALL;
173 netdev->vlan_features = netdev->features;
174 netdev->features |= NETIF_F_HW_VLAN_CTAG_TX;
176 #if LINUX_VERSION_CODE >= KERNEL_VERSION(3,8,0)
177 netdev->hw_enc_features = netdev->features;
179 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,39)
180 netdev->hw_features = netdev->features & ~NETIF_F_LLTX;
182 eth_hw_addr_random(netdev);
185 static struct vport *internal_dev_create(const struct vport_parms *parms)
188 struct internal_dev *internal_dev;
191 vport = ovs_vport_alloc(0, &ovs_internal_vport_ops, parms);
193 err = PTR_ERR(vport);
197 vport->dev = alloc_netdev(sizeof(struct internal_dev),
198 parms->name, NET_NAME_UNKNOWN, do_setup);
201 goto error_free_vport;
204 dev_net_set(vport->dev, ovs_dp_get_net(vport->dp));
205 internal_dev = internal_dev_priv(vport->dev);
206 internal_dev->vport = vport;
208 /* Restrict bridge port to current netns. */
209 if (vport->port_no == OVSP_LOCAL)
210 vport->dev->features |= NETIF_F_NETNS_LOCAL;
213 err = register_netdevice(vport->dev);
215 goto error_free_netdev;
217 dev_set_promiscuity(vport->dev, 1);
219 netif_start_queue(vport->dev);
225 free_netdev(vport->dev);
227 ovs_vport_free(vport);
232 static void internal_dev_destroy(struct vport *vport)
234 netif_stop_queue(vport->dev);
236 dev_set_promiscuity(vport->dev, -1);
238 /* unregister_netdevice() waits for an RCU grace period. */
239 unregister_netdevice(vport->dev);
244 static netdev_tx_t internal_dev_recv(struct sk_buff *skb)
246 struct net_device *netdev = skb->dev;
247 #ifdef HAVE_DEV_TSTATS
248 struct pcpu_sw_netstats *stats;
251 if (unlikely(!(netdev->flags & IFF_UP))) {
253 netdev->stats.rx_dropped++;
257 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,37)
258 if (skb_vlan_tag_present(skb)) {
259 if (unlikely(!vlan_insert_tag_set_proto(skb,
261 skb_vlan_tag_get(skb))))
264 if (skb->ip_summed == CHECKSUM_COMPLETE)
265 skb->csum = csum_add(skb->csum,
266 csum_partial(skb->data + (2 * ETH_ALEN),
269 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);
281 #ifdef HAVE_DEV_TSTATS
282 stats = this_cpu_ptr((struct pcpu_sw_netstats __percpu *)netdev->tstats);
283 u64_stats_update_begin(&stats->syncp);
285 stats->rx_bytes += skb->len;
286 u64_stats_update_end(&stats->syncp);
293 static struct vport_ops ovs_internal_vport_ops = {
294 .type = OVS_VPORT_TYPE_INTERNAL,
295 .create = internal_dev_create,
296 .destroy = internal_dev_destroy,
297 .send = internal_dev_recv,
300 int ovs_is_internal_dev(const struct net_device *netdev)
302 return netdev->netdev_ops == &internal_dev_netdev_ops;
305 struct vport *ovs_internal_dev_get_vport(struct net_device *netdev)
307 if (!ovs_is_internal_dev(netdev))
310 return internal_dev_priv(netdev)->vport;
313 int ovs_internal_dev_rtnl_link_register(void)
317 err = rtnl_link_register(&internal_dev_link_ops);
321 err = ovs_vport_ops_register(&ovs_internal_vport_ops);
323 rtnl_link_unregister(&internal_dev_link_ops);
328 void ovs_internal_dev_rtnl_link_unregister(void)
330 ovs_vport_ops_unregister(&ovs_internal_vport_ops);
331 rtnl_link_unregister(&internal_dev_link_ops);