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/skbuff.h>
29 #include <net/rtnetlink.h>
32 #include "vport-internal_dev.h"
33 #include "vport-netdev.h"
39 static struct vport_ops ovs_internal_vport_ops;
41 static struct internal_dev *internal_dev_priv(struct net_device *netdev)
43 return netdev_priv(netdev);
46 /* Called with rcu_read_lock_bh. */
47 static int internal_dev_xmit(struct sk_buff *skb, struct net_device *netdev)
53 err = ovs_vport_receive(internal_dev_priv(netdev)->vport, skb, NULL);
57 struct pcpu_sw_netstats *tstats = this_cpu_ptr(netdev->tstats);
59 u64_stats_update_begin(&tstats->syncp);
60 tstats->tx_bytes += len;
62 u64_stats_update_end(&tstats->syncp);
64 netdev->stats.tx_errors++;
69 static int internal_dev_open(struct net_device *netdev)
71 netif_start_queue(netdev);
75 static int internal_dev_stop(struct net_device *netdev)
77 netif_stop_queue(netdev);
81 static void internal_dev_getinfo(struct net_device *netdev,
82 struct ethtool_drvinfo *info)
84 strlcpy(info->driver, "openvswitch", sizeof(info->driver));
87 static const struct ethtool_ops internal_dev_ethtool_ops = {
88 .get_drvinfo = internal_dev_getinfo,
89 .get_link = ethtool_op_get_link,
92 static int internal_dev_change_mtu(struct net_device *netdev, int new_mtu)
97 netdev->mtu = new_mtu;
101 static void internal_dev_destructor(struct net_device *dev)
103 struct vport *vport = ovs_internal_dev_get_vport(dev);
105 ovs_vport_free(vport);
109 static struct rtnl_link_stats64 *
110 internal_get_stats(struct net_device *dev, struct rtnl_link_stats64 *stats)
114 memset(stats, 0, sizeof(*stats));
115 stats->rx_errors = dev->stats.rx_errors;
116 stats->tx_errors = dev->stats.tx_errors;
117 stats->tx_dropped = dev->stats.tx_dropped;
118 stats->rx_dropped = dev->stats.rx_dropped;
120 for_each_possible_cpu(i) {
121 const struct pcpu_sw_netstats *percpu_stats;
122 struct pcpu_sw_netstats local_stats;
125 percpu_stats = per_cpu_ptr(dev->tstats, i);
128 start = u64_stats_fetch_begin_irq(&percpu_stats->syncp);
129 local_stats = *percpu_stats;
130 } while (u64_stats_fetch_retry_irq(&percpu_stats->syncp, start));
132 stats->rx_bytes += local_stats.rx_bytes;
133 stats->rx_packets += local_stats.rx_packets;
134 stats->tx_bytes += local_stats.tx_bytes;
135 stats->tx_packets += local_stats.tx_packets;
141 static void internal_set_rx_headroom(struct net_device *dev, int new_hr)
143 dev->needed_headroom = new_hr < 0 ? 0 : new_hr;
146 static const struct net_device_ops internal_dev_netdev_ops = {
147 .ndo_open = internal_dev_open,
148 .ndo_stop = internal_dev_stop,
149 .ndo_start_xmit = internal_dev_xmit,
150 .ndo_set_mac_address = eth_mac_addr,
151 .ndo_change_mtu = internal_dev_change_mtu,
152 .ndo_get_stats64 = internal_get_stats,
153 .ndo_set_rx_headroom = internal_set_rx_headroom,
156 static struct rtnl_link_ops internal_dev_link_ops __read_mostly = {
157 .kind = "openvswitch",
160 static void do_setup(struct net_device *netdev)
164 netdev->netdev_ops = &internal_dev_netdev_ops;
166 netdev->priv_flags &= ~IFF_TX_SKB_SHARING;
167 netdev->priv_flags |= IFF_LIVE_ADDR_CHANGE | IFF_OPENVSWITCH |
168 IFF_PHONY_HEADROOM | IFF_NO_QUEUE;
169 netdev->destructor = internal_dev_destructor;
170 netdev->ethtool_ops = &internal_dev_ethtool_ops;
171 netdev->rtnl_link_ops = &internal_dev_link_ops;
173 netdev->features = NETIF_F_LLTX | NETIF_F_SG | NETIF_F_FRAGLIST |
174 NETIF_F_HIGHDMA | NETIF_F_HW_CSUM |
175 NETIF_F_GSO_SOFTWARE | NETIF_F_GSO_ENCAP_ALL;
177 netdev->vlan_features = netdev->features;
178 netdev->hw_enc_features = netdev->features;
179 netdev->features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_STAG_TX;
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_USER, do_setup);
201 goto error_free_vport;
203 vport->dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
204 if (!vport->dev->tstats) {
206 goto error_free_netdev;
208 vport->dev->needed_headroom = vport->dp->max_headroom;
210 dev_net_set(vport->dev, ovs_dp_get_net(vport->dp));
211 internal_dev = internal_dev_priv(vport->dev);
212 internal_dev->vport = vport;
214 /* Restrict bridge port to current netns. */
215 if (vport->port_no == OVSP_LOCAL)
216 vport->dev->features |= NETIF_F_NETNS_LOCAL;
219 err = register_netdevice(vport->dev);
223 dev_set_promiscuity(vport->dev, 1);
225 netif_start_queue(vport->dev);
231 free_percpu(vport->dev->tstats);
233 free_netdev(vport->dev);
235 ovs_vport_free(vport);
240 static void internal_dev_destroy(struct vport *vport)
242 netif_stop_queue(vport->dev);
244 dev_set_promiscuity(vport->dev, -1);
246 /* unregister_netdevice() waits for an RCU grace period. */
247 unregister_netdevice(vport->dev);
248 free_percpu(vport->dev->tstats);
252 static netdev_tx_t internal_dev_recv(struct sk_buff *skb)
254 struct net_device *netdev = skb->dev;
255 struct pcpu_sw_netstats *stats;
257 if (unlikely(!(netdev->flags & IFF_UP))) {
259 netdev->stats.rx_dropped++;
267 skb->pkt_type = PACKET_HOST;
268 skb->protocol = eth_type_trans(skb, netdev);
269 skb_postpull_rcsum(skb, eth_hdr(skb), ETH_HLEN);
271 stats = this_cpu_ptr(netdev->tstats);
272 u64_stats_update_begin(&stats->syncp);
274 stats->rx_bytes += skb->len;
275 u64_stats_update_end(&stats->syncp);
281 static struct vport_ops ovs_internal_vport_ops = {
282 .type = OVS_VPORT_TYPE_INTERNAL,
283 .create = internal_dev_create,
284 .destroy = internal_dev_destroy,
285 .send = internal_dev_recv,
288 int ovs_is_internal_dev(const struct net_device *netdev)
290 return netdev->netdev_ops == &internal_dev_netdev_ops;
293 struct vport *ovs_internal_dev_get_vport(struct net_device *netdev)
295 if (!ovs_is_internal_dev(netdev))
298 return internal_dev_priv(netdev)->vport;
301 int ovs_internal_dev_rtnl_link_register(void)
305 err = rtnl_link_register(&internal_dev_link_ops);
309 err = ovs_vport_ops_register(&ovs_internal_vport_ops);
311 rtnl_link_unregister(&internal_dev_link_ops);
316 void ovs_internal_dev_rtnl_link_unregister(void)
318 ovs_vport_ops_unregister(&ovs_internal_vport_ops);
319 rtnl_link_unregister(&internal_dev_link_ops);