1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright (c) 2007-2012 Nicira, Inc.
6 #include <linux/if_vlan.h>
7 #include <linux/kernel.h>
8 #include <linux/netdevice.h>
9 #include <linux/etherdevice.h>
10 #include <linux/ethtool.h>
11 #include <linux/skbuff.h>
15 #include <net/rtnetlink.h>
18 #include "vport-internal_dev.h"
19 #include "vport-netdev.h"
25 static struct vport_ops ovs_internal_vport_ops;
27 static struct internal_dev *internal_dev_priv(struct net_device *netdev)
29 return netdev_priv(netdev);
32 /* Called with rcu_read_lock_bh. */
34 internal_dev_xmit(struct sk_buff *skb, struct net_device *netdev)
40 err = ovs_vport_receive(internal_dev_priv(netdev)->vport, skb, NULL);
44 struct pcpu_sw_netstats *tstats = this_cpu_ptr(netdev->tstats);
46 u64_stats_update_begin(&tstats->syncp);
47 tstats->tx_bytes += len;
49 u64_stats_update_end(&tstats->syncp);
51 netdev->stats.tx_errors++;
56 static int internal_dev_open(struct net_device *netdev)
58 netif_start_queue(netdev);
62 static int internal_dev_stop(struct net_device *netdev)
64 netif_stop_queue(netdev);
68 static void internal_dev_getinfo(struct net_device *netdev,
69 struct ethtool_drvinfo *info)
71 strlcpy(info->driver, "openvswitch", sizeof(info->driver));
74 static const struct ethtool_ops internal_dev_ethtool_ops = {
75 .get_drvinfo = internal_dev_getinfo,
76 .get_link = ethtool_op_get_link,
79 static void internal_dev_destructor(struct net_device *dev)
81 struct vport *vport = ovs_internal_dev_get_vport(dev);
83 ovs_vport_free(vport);
87 internal_get_stats(struct net_device *dev, struct rtnl_link_stats64 *stats)
89 memset(stats, 0, sizeof(*stats));
90 stats->rx_errors = dev->stats.rx_errors;
91 stats->tx_errors = dev->stats.tx_errors;
92 stats->tx_dropped = dev->stats.tx_dropped;
93 stats->rx_dropped = dev->stats.rx_dropped;
95 dev_fetch_sw_netstats(stats, dev->tstats);
98 static const struct net_device_ops internal_dev_netdev_ops = {
99 .ndo_open = internal_dev_open,
100 .ndo_stop = internal_dev_stop,
101 .ndo_start_xmit = internal_dev_xmit,
102 .ndo_set_mac_address = eth_mac_addr,
103 .ndo_get_stats64 = internal_get_stats,
106 static struct rtnl_link_ops internal_dev_link_ops __read_mostly = {
107 .kind = "openvswitch",
110 static void do_setup(struct net_device *netdev)
114 netdev->max_mtu = ETH_MAX_MTU;
116 netdev->netdev_ops = &internal_dev_netdev_ops;
118 netdev->priv_flags &= ~IFF_TX_SKB_SHARING;
119 netdev->priv_flags |= IFF_LIVE_ADDR_CHANGE | IFF_OPENVSWITCH |
121 netdev->needs_free_netdev = true;
122 netdev->priv_destructor = NULL;
123 netdev->ethtool_ops = &internal_dev_ethtool_ops;
124 netdev->rtnl_link_ops = &internal_dev_link_ops;
126 netdev->features = NETIF_F_LLTX | NETIF_F_SG | NETIF_F_FRAGLIST |
127 NETIF_F_HIGHDMA | NETIF_F_HW_CSUM |
128 NETIF_F_GSO_SOFTWARE | NETIF_F_GSO_ENCAP_ALL;
130 netdev->vlan_features = netdev->features;
131 netdev->hw_enc_features = netdev->features;
132 netdev->features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_STAG_TX;
133 netdev->hw_features = netdev->features & ~NETIF_F_LLTX;
135 eth_hw_addr_random(netdev);
138 static struct vport *internal_dev_create(const struct vport_parms *parms)
141 struct internal_dev *internal_dev;
142 struct net_device *dev;
145 vport = ovs_vport_alloc(0, &ovs_internal_vport_ops, parms);
147 err = PTR_ERR(vport);
151 dev = alloc_netdev(sizeof(struct internal_dev),
152 parms->name, NET_NAME_USER, do_setup);
156 goto error_free_vport;
158 vport->dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
159 if (!vport->dev->tstats) {
161 goto error_free_netdev;
164 dev_net_set(vport->dev, ovs_dp_get_net(vport->dp));
165 internal_dev = internal_dev_priv(vport->dev);
166 internal_dev->vport = vport;
168 /* Restrict bridge port to current netns. */
169 if (vport->port_no == OVSP_LOCAL)
170 vport->dev->features |= NETIF_F_NETNS_LOCAL;
173 err = register_netdevice(vport->dev);
176 vport->dev->priv_destructor = internal_dev_destructor;
178 dev_set_promiscuity(vport->dev, 1);
180 netif_start_queue(vport->dev);
186 free_percpu(dev->tstats);
190 ovs_vport_free(vport);
195 static void internal_dev_destroy(struct vport *vport)
197 netif_stop_queue(vport->dev);
199 dev_set_promiscuity(vport->dev, -1);
201 /* unregister_netdevice() waits for an RCU grace period. */
202 unregister_netdevice(vport->dev);
203 free_percpu(vport->dev->tstats);
207 static netdev_tx_t internal_dev_recv(struct sk_buff *skb)
209 struct net_device *netdev = skb->dev;
211 if (unlikely(!(netdev->flags & IFF_UP))) {
213 netdev->stats.rx_dropped++;
221 skb->pkt_type = PACKET_HOST;
222 skb->protocol = eth_type_trans(skb, netdev);
223 skb_postpull_rcsum(skb, eth_hdr(skb), ETH_HLEN);
224 dev_sw_netstats_rx_add(netdev, skb->len);
230 static struct vport_ops ovs_internal_vport_ops = {
231 .type = OVS_VPORT_TYPE_INTERNAL,
232 .create = internal_dev_create,
233 .destroy = internal_dev_destroy,
234 .send = internal_dev_recv,
237 int ovs_is_internal_dev(const struct net_device *netdev)
239 return netdev->netdev_ops == &internal_dev_netdev_ops;
242 struct vport *ovs_internal_dev_get_vport(struct net_device *netdev)
244 if (!ovs_is_internal_dev(netdev))
247 return internal_dev_priv(netdev)->vport;
250 int ovs_internal_dev_rtnl_link_register(void)
254 err = rtnl_link_register(&internal_dev_link_ops);
258 err = ovs_vport_ops_register(&ovs_internal_vport_ops);
260 rtnl_link_unregister(&internal_dev_link_ops);
265 void ovs_internal_dev_rtnl_link_unregister(void)
267 ovs_vport_ops_unregister(&ovs_internal_vport_ops);
268 rtnl_link_unregister(&internal_dev_link_ops);