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 internal_dev *internal_dev_priv(struct net_device *netdev)
43 return netdev_priv(netdev);
46 /* This function is only called by the kernel network layer.*/
47 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,36)
48 static struct rtnl_link_stats64 *internal_dev_get_stats(struct net_device *netdev,
49 struct rtnl_link_stats64 *stats)
52 static struct net_device_stats *internal_dev_sys_stats(struct net_device *netdev)
54 struct net_device_stats *stats = &netdev->stats;
56 struct vport *vport = ovs_internal_dev_get_vport(netdev);
57 struct ovs_vport_stats vport_stats;
59 ovs_vport_get_stats(vport, &vport_stats);
61 /* The tx and rx stats need to be swapped because the
62 * switch and host OS have opposite perspectives.
64 stats->rx_packets = vport_stats.tx_packets;
65 stats->tx_packets = vport_stats.rx_packets;
66 stats->rx_bytes = vport_stats.tx_bytes;
67 stats->tx_bytes = vport_stats.rx_bytes;
68 stats->rx_errors = vport_stats.tx_errors;
69 stats->tx_errors = vport_stats.rx_errors;
70 stats->rx_dropped = vport_stats.tx_dropped;
71 stats->tx_dropped = vport_stats.rx_dropped;
76 /* Called with rcu_read_lock_bh. */
77 static int internal_dev_xmit(struct sk_buff *skb, struct net_device *netdev)
80 ovs_vport_receive(internal_dev_priv(netdev)->vport, skb, NULL);
85 static int internal_dev_open(struct net_device *netdev)
87 netif_start_queue(netdev);
91 static int internal_dev_stop(struct net_device *netdev)
93 netif_stop_queue(netdev);
97 static void internal_dev_getinfo(struct net_device *netdev,
98 struct ethtool_drvinfo *info)
100 strlcpy(info->driver, "openvswitch", sizeof(info->driver));
103 static const struct ethtool_ops internal_dev_ethtool_ops = {
104 .get_drvinfo = internal_dev_getinfo,
105 .get_link = ethtool_op_get_link,
106 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,39)
107 .get_sg = ethtool_op_get_sg,
108 .set_sg = ethtool_op_set_sg,
109 .get_tx_csum = ethtool_op_get_tx_csum,
110 .set_tx_csum = ethtool_op_set_tx_hw_csum,
111 .get_tso = ethtool_op_get_tso,
112 .set_tso = ethtool_op_set_tso,
116 static int internal_dev_change_mtu(struct net_device *netdev, int new_mtu)
121 netdev->mtu = new_mtu;
125 static void internal_dev_destructor(struct net_device *dev)
127 struct vport *vport = ovs_internal_dev_get_vport(dev);
129 ovs_vport_free(vport);
133 static const struct net_device_ops internal_dev_netdev_ops = {
134 .ndo_open = internal_dev_open,
135 .ndo_stop = internal_dev_stop,
136 .ndo_start_xmit = internal_dev_xmit,
137 .ndo_set_mac_address = eth_mac_addr,
138 .ndo_change_mtu = internal_dev_change_mtu,
139 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,36)
140 .ndo_get_stats64 = internal_dev_get_stats,
142 .ndo_get_stats = internal_dev_sys_stats,
146 static void do_setup(struct net_device *netdev)
150 netdev->netdev_ops = &internal_dev_netdev_ops;
152 netdev->priv_flags &= ~IFF_TX_SKB_SHARING;
153 netdev->priv_flags |= IFF_LIVE_ADDR_CHANGE;
154 netdev->destructor = internal_dev_destructor;
155 netdev->ethtool_ops = &internal_dev_ethtool_ops;
156 netdev->tx_queue_len = 0;
158 netdev->features = NETIF_F_LLTX | NETIF_F_SG | NETIF_F_FRAGLIST |
159 NETIF_F_HIGHDMA | NETIF_F_HW_CSUM |
160 NETIF_F_GSO_SOFTWARE | NETIF_F_GSO_ENCAP_ALL;
162 netdev->vlan_features = netdev->features;
163 netdev->features |= NETIF_F_HW_VLAN_CTAG_TX;
165 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,39)
166 netdev->hw_features = netdev->features & ~NETIF_F_LLTX;
169 #if LINUX_VERSION_CODE >= KERNEL_VERSION(3,8,0)
170 netdev->hw_enc_features = netdev->features;
173 eth_hw_addr_random(netdev);
176 static struct vport *internal_dev_create(const struct vport_parms *parms)
179 struct netdev_vport *netdev_vport;
180 struct internal_dev *internal_dev;
183 vport = ovs_vport_alloc(sizeof(struct netdev_vport),
184 &ovs_internal_vport_ops, parms);
186 err = PTR_ERR(vport);
190 netdev_vport = netdev_vport_priv(vport);
192 netdev_vport->dev = alloc_netdev(sizeof(struct internal_dev),
193 parms->name, NET_NAME_UNKNOWN, do_setup);
194 if (!netdev_vport->dev) {
196 goto error_free_vport;
199 dev_net_set(netdev_vport->dev, ovs_dp_get_net(vport->dp));
200 internal_dev = internal_dev_priv(netdev_vport->dev);
201 internal_dev->vport = vport;
203 /* Restrict bridge port to current netns. */
204 if (vport->port_no == OVSP_LOCAL)
205 netdev_vport->dev->features |= NETIF_F_NETNS_LOCAL;
208 err = register_netdevice(netdev_vport->dev);
210 goto error_free_netdev;
212 dev_set_promiscuity(netdev_vport->dev, 1);
214 netif_start_queue(netdev_vport->dev);
220 free_netdev(netdev_vport->dev);
222 ovs_vport_free(vport);
227 static void internal_dev_destroy(struct vport *vport)
229 struct netdev_vport *netdev_vport = netdev_vport_priv(vport);
231 netif_stop_queue(netdev_vport->dev);
233 dev_set_promiscuity(netdev_vport->dev, -1);
235 /* unregister_netdevice() waits for an RCU grace period. */
236 unregister_netdevice(netdev_vport->dev);
241 static int internal_dev_recv(struct vport *vport, struct sk_buff *skb)
243 struct net_device *netdev = netdev_vport_priv(vport)->dev;
246 if (unlikely(!(netdev->flags & IFF_UP))) {
251 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,37)
252 if (vlan_tx_tag_present(skb)) {
253 if (unlikely(!__vlan_put_tag(skb,
255 vlan_tx_tag_get(skb))))
258 if (skb->ip_summed == CHECKSUM_COMPLETE)
259 skb->csum = csum_add(skb->csum,
260 csum_partial(skb->data + (2 * ETH_ALEN),
263 vlan_set_tci(skb, 0);
274 skb->pkt_type = PACKET_HOST;
275 skb->protocol = eth_type_trans(skb, netdev);
276 skb_postpull_rcsum(skb, eth_hdr(skb), ETH_HLEN);
283 const struct vport_ops ovs_internal_vport_ops = {
284 .type = OVS_VPORT_TYPE_INTERNAL,
285 .create = internal_dev_create,
286 .destroy = internal_dev_destroy,
287 .get_name = ovs_netdev_get_name,
288 .send = internal_dev_recv,
291 int ovs_is_internal_dev(const struct net_device *netdev)
293 return netdev->netdev_ops == &internal_dev_netdev_ops;
296 struct vport *ovs_internal_dev_get_vport(struct net_device *netdev)
298 if (!ovs_is_internal_dev(netdev))
301 return internal_dev_priv(netdev)->vport;