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19#include <linux/if_vlan.h>
20#include <linux/kernel.h>
21#include <linux/netdevice.h>
22#include <linux/etherdevice.h>
23#include <linux/ethtool.h>
24#include <linux/skbuff.h>
25
26#include <net/dst.h>
27#include <net/xfrm.h>
28#include <net/rtnetlink.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 vport_ops ovs_internal_vport_ops;
39
40static struct internal_dev *internal_dev_priv(struct net_device *netdev)
41{
42 return netdev_priv(netdev);
43}
44
45
46static netdev_tx_t
47internal_dev_xmit(struct sk_buff *skb, struct net_device *netdev)
48{
49 int len, err;
50
51 len = skb->len;
52 rcu_read_lock();
53 err = ovs_vport_receive(internal_dev_priv(netdev)->vport, skb, NULL);
54 rcu_read_unlock();
55
56 if (likely(!err)) {
57 struct pcpu_sw_netstats *tstats = this_cpu_ptr(netdev->tstats);
58
59 u64_stats_update_begin(&tstats->syncp);
60 tstats->tx_bytes += len;
61 tstats->tx_packets++;
62 u64_stats_update_end(&tstats->syncp);
63 } else {
64 netdev->stats.tx_errors++;
65 }
66 return NETDEV_TX_OK;
67}
68
69static int internal_dev_open(struct net_device *netdev)
70{
71 netif_start_queue(netdev);
72 return 0;
73}
74
75static int internal_dev_stop(struct net_device *netdev)
76{
77 netif_stop_queue(netdev);
78 return 0;
79}
80
81static void internal_dev_getinfo(struct net_device *netdev,
82 struct ethtool_drvinfo *info)
83{
84 strlcpy(info->driver, "openvswitch", sizeof(info->driver));
85}
86
87static const struct ethtool_ops internal_dev_ethtool_ops = {
88 .get_drvinfo = internal_dev_getinfo,
89 .get_link = ethtool_op_get_link,
90};
91
92static void internal_dev_destructor(struct net_device *dev)
93{
94 struct vport *vport = ovs_internal_dev_get_vport(dev);
95
96 ovs_vport_free(vport);
97}
98
99static void
100internal_get_stats(struct net_device *dev, struct rtnl_link_stats64 *stats)
101{
102 int i;
103
104 memset(stats, 0, sizeof(*stats));
105 stats->rx_errors = dev->stats.rx_errors;
106 stats->tx_errors = dev->stats.tx_errors;
107 stats->tx_dropped = dev->stats.tx_dropped;
108 stats->rx_dropped = dev->stats.rx_dropped;
109
110 for_each_possible_cpu(i) {
111 const struct pcpu_sw_netstats *percpu_stats;
112 struct pcpu_sw_netstats local_stats;
113 unsigned int start;
114
115 percpu_stats = per_cpu_ptr(dev->tstats, i);
116
117 do {
118 start = u64_stats_fetch_begin_irq(&percpu_stats->syncp);
119 local_stats = *percpu_stats;
120 } while (u64_stats_fetch_retry_irq(&percpu_stats->syncp, start));
121
122 stats->rx_bytes += local_stats.rx_bytes;
123 stats->rx_packets += local_stats.rx_packets;
124 stats->tx_bytes += local_stats.tx_bytes;
125 stats->tx_packets += local_stats.tx_packets;
126 }
127}
128
129static const struct net_device_ops internal_dev_netdev_ops = {
130 .ndo_open = internal_dev_open,
131 .ndo_stop = internal_dev_stop,
132 .ndo_start_xmit = internal_dev_xmit,
133 .ndo_set_mac_address = eth_mac_addr,
134 .ndo_get_stats64 = internal_get_stats,
135};
136
137static struct rtnl_link_ops internal_dev_link_ops __read_mostly = {
138 .kind = "openvswitch",
139};
140
141static void do_setup(struct net_device *netdev)
142{
143 ether_setup(netdev);
144
145 netdev->max_mtu = ETH_MAX_MTU;
146
147 netdev->netdev_ops = &internal_dev_netdev_ops;
148
149 netdev->priv_flags &= ~IFF_TX_SKB_SHARING;
150 netdev->priv_flags |= IFF_LIVE_ADDR_CHANGE | IFF_OPENVSWITCH |
151 IFF_NO_QUEUE;
152 netdev->needs_free_netdev = true;
153 netdev->priv_destructor = NULL;
154 netdev->ethtool_ops = &internal_dev_ethtool_ops;
155 netdev->rtnl_link_ops = &internal_dev_link_ops;
156
157 netdev->features = NETIF_F_LLTX | NETIF_F_SG | NETIF_F_FRAGLIST |
158 NETIF_F_HIGHDMA | NETIF_F_HW_CSUM |
159 NETIF_F_GSO_SOFTWARE | NETIF_F_GSO_ENCAP_ALL;
160
161 netdev->vlan_features = netdev->features;
162 netdev->hw_enc_features = netdev->features;
163 netdev->features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_STAG_TX;
164 netdev->hw_features = netdev->features & ~NETIF_F_LLTX;
165
166 eth_hw_addr_random(netdev);
167}
168
169static struct vport *internal_dev_create(const struct vport_parms *parms)
170{
171 struct vport *vport;
172 struct internal_dev *internal_dev;
173 struct net_device *dev;
174 int err;
175
176 vport = ovs_vport_alloc(0, &ovs_internal_vport_ops, parms);
177 if (IS_ERR(vport)) {
178 err = PTR_ERR(vport);
179 goto error;
180 }
181
182 dev = alloc_netdev(sizeof(struct internal_dev),
183 parms->name, NET_NAME_USER, do_setup);
184 vport->dev = dev;
185 if (!vport->dev) {
186 err = -ENOMEM;
187 goto error_free_vport;
188 }
189 vport->dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
190 if (!vport->dev->tstats) {
191 err = -ENOMEM;
192 goto error_free_netdev;
193 }
194
195 dev_net_set(vport->dev, ovs_dp_get_net(vport->dp));
196 internal_dev = internal_dev_priv(vport->dev);
197 internal_dev->vport = vport;
198
199
200 if (vport->port_no == OVSP_LOCAL)
201 vport->dev->features |= NETIF_F_NETNS_LOCAL;
202
203 rtnl_lock();
204 err = register_netdevice(vport->dev);
205 if (err)
206 goto error_unlock;
207 vport->dev->priv_destructor = internal_dev_destructor;
208
209 dev_set_promiscuity(vport->dev, 1);
210 rtnl_unlock();
211 netif_start_queue(vport->dev);
212
213 return vport;
214
215error_unlock:
216 rtnl_unlock();
217 free_percpu(dev->tstats);
218error_free_netdev:
219 free_netdev(dev);
220error_free_vport:
221 ovs_vport_free(vport);
222error:
223 return ERR_PTR(err);
224}
225
226static void internal_dev_destroy(struct vport *vport)
227{
228 netif_stop_queue(vport->dev);
229 rtnl_lock();
230 dev_set_promiscuity(vport->dev, -1);
231
232
233 unregister_netdevice(vport->dev);
234 free_percpu(vport->dev->tstats);
235 rtnl_unlock();
236}
237
238static netdev_tx_t internal_dev_recv(struct sk_buff *skb)
239{
240 struct net_device *netdev = skb->dev;
241 struct pcpu_sw_netstats *stats;
242
243 if (unlikely(!(netdev->flags & IFF_UP))) {
244 kfree_skb(skb);
245 netdev->stats.rx_dropped++;
246 return NETDEV_TX_OK;
247 }
248
249 skb_dst_drop(skb);
250 nf_reset(skb);
251 secpath_reset(skb);
252
253 skb->pkt_type = PACKET_HOST;
254 skb->protocol = eth_type_trans(skb, netdev);
255 skb_postpull_rcsum(skb, eth_hdr(skb), ETH_HLEN);
256
257 stats = this_cpu_ptr(netdev->tstats);
258 u64_stats_update_begin(&stats->syncp);
259 stats->rx_packets++;
260 stats->rx_bytes += skb->len;
261 u64_stats_update_end(&stats->syncp);
262
263 netif_rx(skb);
264 return NETDEV_TX_OK;
265}
266
267static struct vport_ops ovs_internal_vport_ops = {
268 .type = OVS_VPORT_TYPE_INTERNAL,
269 .create = internal_dev_create,
270 .destroy = internal_dev_destroy,
271 .send = internal_dev_recv,
272};
273
274int ovs_is_internal_dev(const struct net_device *netdev)
275{
276 return netdev->netdev_ops == &internal_dev_netdev_ops;
277}
278
279struct vport *ovs_internal_dev_get_vport(struct net_device *netdev)
280{
281 if (!ovs_is_internal_dev(netdev))
282 return NULL;
283
284 return internal_dev_priv(netdev)->vport;
285}
286
287int ovs_internal_dev_rtnl_link_register(void)
288{
289 int err;
290
291 err = rtnl_link_register(&internal_dev_link_ops);
292 if (err < 0)
293 return err;
294
295 err = ovs_vport_ops_register(&ovs_internal_vport_ops);
296 if (err < 0)
297 rtnl_link_unregister(&internal_dev_link_ops);
298
299 return err;
300}
301
302void ovs_internal_dev_rtnl_link_unregister(void)
303{
304 ovs_vport_ops_unregister(&ovs_internal_vport_ops);
305 rtnl_link_unregister(&internal_dev_link_ops);
306}
307
