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