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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
27#include <net/dst.h>
28#include <net/xfrm.h>
29
30#include "datapath.h"
31#include "vport-internal_dev.h"
32#include "vport-netdev.h"
33
34struct internal_dev {
35 struct vport *vport;
36};
37
38static struct internal_dev *internal_dev_priv(struct net_device *netdev)
39{
40 return netdev_priv(netdev);
41}
42
43
44static struct rtnl_link_stats64 *internal_dev_get_stats(struct net_device *netdev,
45 struct rtnl_link_stats64 *stats)
46{
47 struct vport *vport = ovs_internal_dev_get_vport(netdev);
48 struct ovs_vport_stats vport_stats;
49
50 ovs_vport_get_stats(vport, &vport_stats);
51
52
53
54 stats->rx_packets = vport_stats.tx_packets;
55 stats->tx_packets = vport_stats.rx_packets;
56 stats->rx_bytes = vport_stats.tx_bytes;
57 stats->tx_bytes = vport_stats.rx_bytes;
58 stats->rx_errors = vport_stats.tx_errors;
59 stats->tx_errors = vport_stats.rx_errors;
60 stats->rx_dropped = vport_stats.tx_dropped;
61 stats->tx_dropped = vport_stats.rx_dropped;
62
63 return stats;
64}
65
66
67static int internal_dev_xmit(struct sk_buff *skb, struct net_device *netdev)
68{
69 rcu_read_lock();
70 ovs_vport_receive(internal_dev_priv(netdev)->vport, skb, NULL);
71 rcu_read_unlock();
72 return 0;
73}
74
75static int internal_dev_open(struct net_device *netdev)
76{
77 netif_start_queue(netdev);
78 return 0;
79}
80
81static int internal_dev_stop(struct net_device *netdev)
82{
83 netif_stop_queue(netdev);
84 return 0;
85}
86
87static void internal_dev_getinfo(struct net_device *netdev,
88 struct ethtool_drvinfo *info)
89{
90 strlcpy(info->driver, "openvswitch", sizeof(info->driver));
91}
92
93static const struct ethtool_ops internal_dev_ethtool_ops = {
94 .get_drvinfo = internal_dev_getinfo,
95 .get_link = ethtool_op_get_link,
96};
97
98static int internal_dev_change_mtu(struct net_device *netdev, int new_mtu)
99{
100 if (new_mtu < 68)
101 return -EINVAL;
102
103 netdev->mtu = new_mtu;
104 return 0;
105}
106
107static void internal_dev_destructor(struct net_device *dev)
108{
109 struct vport *vport = ovs_internal_dev_get_vport(dev);
110
111 ovs_vport_free(vport);
112 free_netdev(dev);
113}
114
115static const struct net_device_ops internal_dev_netdev_ops = {
116 .ndo_open = internal_dev_open,
117 .ndo_stop = internal_dev_stop,
118 .ndo_start_xmit = internal_dev_xmit,
119 .ndo_set_mac_address = eth_mac_addr,
120 .ndo_change_mtu = internal_dev_change_mtu,
121 .ndo_get_stats64 = internal_dev_get_stats,
122};
123
124static void do_setup(struct net_device *netdev)
125{
126 ether_setup(netdev);
127
128 netdev->netdev_ops = &internal_dev_netdev_ops;
129
130 netdev->priv_flags &= ~IFF_TX_SKB_SHARING;
131 netdev->priv_flags |= IFF_LIVE_ADDR_CHANGE;
132 netdev->destructor = internal_dev_destructor;
133 SET_ETHTOOL_OPS(netdev, &internal_dev_ethtool_ops);
134 netdev->tx_queue_len = 0;
135
136 netdev->features = NETIF_F_LLTX | NETIF_F_SG | NETIF_F_FRAGLIST |
137 NETIF_F_HIGHDMA | NETIF_F_HW_CSUM | NETIF_F_TSO;
138
139 netdev->vlan_features = netdev->features;
140 netdev->features |= NETIF_F_HW_VLAN_CTAG_TX;
141 netdev->hw_features = netdev->features & ~NETIF_F_LLTX;
142 eth_hw_addr_random(netdev);
143}
144
145static struct vport *internal_dev_create(const struct vport_parms *parms)
146{
147 struct vport *vport;
148 struct netdev_vport *netdev_vport;
149 struct internal_dev *internal_dev;
150 int err;
151
152 vport = ovs_vport_alloc(sizeof(struct netdev_vport),
153 &ovs_internal_vport_ops, parms);
154 if (IS_ERR(vport)) {
155 err = PTR_ERR(vport);
156 goto error;
157 }
158
159 netdev_vport = netdev_vport_priv(vport);
160
161 netdev_vport->dev = alloc_netdev(sizeof(struct internal_dev),
162 parms->name, do_setup);
163 if (!netdev_vport->dev) {
164 err = -ENOMEM;
165 goto error_free_vport;
166 }
167
168 dev_net_set(netdev_vport->dev, ovs_dp_get_net(vport->dp));
169 internal_dev = internal_dev_priv(netdev_vport->dev);
170 internal_dev->vport = vport;
171
172
173 if (vport->port_no == OVSP_LOCAL)
174 netdev_vport->dev->features |= NETIF_F_NETNS_LOCAL;
175
176 rtnl_lock();
177 err = register_netdevice(netdev_vport->dev);
178 if (err)
179 goto error_free_netdev;
180
181 dev_set_promiscuity(netdev_vport->dev, 1);
182 rtnl_unlock();
183 netif_start_queue(netdev_vport->dev);
184
185 return vport;
186
187error_free_netdev:
188 rtnl_unlock();
189 free_netdev(netdev_vport->dev);
190error_free_vport:
191 ovs_vport_free(vport);
192error:
193 return ERR_PTR(err);
194}
195
196static void internal_dev_destroy(struct vport *vport)
197{
198 struct netdev_vport *netdev_vport = netdev_vport_priv(vport);
199
200 netif_stop_queue(netdev_vport->dev);
201 rtnl_lock();
202 dev_set_promiscuity(netdev_vport->dev, -1);
203
204
205 unregister_netdevice(netdev_vport->dev);
206
207 rtnl_unlock();
208}
209
210static int internal_dev_recv(struct vport *vport, struct sk_buff *skb)
211{
212 struct net_device *netdev = netdev_vport_priv(vport)->dev;
213 int len;
214
215 len = skb->len;
216
217 skb_dst_drop(skb);
218 nf_reset(skb);
219 secpath_reset(skb);
220
221 skb->dev = netdev;
222 skb->pkt_type = PACKET_HOST;
223 skb->protocol = eth_type_trans(skb, netdev);
224 skb_postpull_rcsum(skb, eth_hdr(skb), ETH_HLEN);
225
226 netif_rx(skb);
227
228 return len;
229}
230
231const struct vport_ops ovs_internal_vport_ops = {
232 .type = OVS_VPORT_TYPE_INTERNAL,
233 .create = internal_dev_create,
234 .destroy = internal_dev_destroy,
235 .get_name = ovs_netdev_get_name,
236 .send = internal_dev_recv,
237};
238
239int ovs_is_internal_dev(const struct net_device *netdev)
240{
241 return netdev->netdev_ops == &internal_dev_netdev_ops;
242}
243
244struct vport *ovs_internal_dev_get_vport(struct net_device *netdev)
245{
246 if (!ovs_is_internal_dev(netdev))
247 return NULL;
248
249 return internal_dev_priv(netdev)->vport;
250}
251
