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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (c) 2007-2012 Nicira, Inc.
4 */
5
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>
12
13#include <net/dst.h>
14#include <net/xfrm.h>
15#include <net/rtnetlink.h>
16
17#include "datapath.h"
18#include "vport-internal_dev.h"
19#include "vport-netdev.h"
20
21struct internal_dev {
22 struct vport *vport;
23};
24
25static struct vport_ops ovs_internal_vport_ops;
26
27static struct internal_dev *internal_dev_priv(struct net_device *netdev)
28{
29 return netdev_priv(netdev);
30}
31
32/* Called with rcu_read_lock_bh. */
33static netdev_tx_t
34internal_dev_xmit(struct sk_buff *skb, struct net_device *netdev)
35{
36 int len, err;
37
38 /* store len value because skb can be freed inside ovs_vport_receive() */
39 len = skb->len;
40
41 rcu_read_lock();
42 err = ovs_vport_receive(internal_dev_priv(netdev)->vport, skb, NULL);
43 rcu_read_unlock();
44
45 if (likely(!err))
46 dev_sw_netstats_tx_add(netdev, 1, len);
47 else
48 netdev->stats.tx_errors++;
49
50 return NETDEV_TX_OK;
51}
52
53static int internal_dev_open(struct net_device *netdev)
54{
55 netif_start_queue(netdev);
56 return 0;
57}
58
59static int internal_dev_stop(struct net_device *netdev)
60{
61 netif_stop_queue(netdev);
62 return 0;
63}
64
65static void internal_dev_getinfo(struct net_device *netdev,
66 struct ethtool_drvinfo *info)
67{
68 strlcpy(info->driver, "openvswitch", sizeof(info->driver));
69}
70
71static const struct ethtool_ops internal_dev_ethtool_ops = {
72 .get_drvinfo = internal_dev_getinfo,
73 .get_link = ethtool_op_get_link,
74};
75
76static void internal_dev_destructor(struct net_device *dev)
77{
78 struct vport *vport = ovs_internal_dev_get_vport(dev);
79
80 ovs_vport_free(vport);
81}
82
83static const struct net_device_ops internal_dev_netdev_ops = {
84 .ndo_open = internal_dev_open,
85 .ndo_stop = internal_dev_stop,
86 .ndo_start_xmit = internal_dev_xmit,
87 .ndo_set_mac_address = eth_mac_addr,
88 .ndo_get_stats64 = dev_get_tstats64,
89};
90
91static struct rtnl_link_ops internal_dev_link_ops __read_mostly = {
92 .kind = "openvswitch",
93};
94
95static void do_setup(struct net_device *netdev)
96{
97 ether_setup(netdev);
98
99 netdev->max_mtu = ETH_MAX_MTU;
100
101 netdev->netdev_ops = &internal_dev_netdev_ops;
102
103 netdev->priv_flags &= ~IFF_TX_SKB_SHARING;
104 netdev->priv_flags |= IFF_LIVE_ADDR_CHANGE | IFF_OPENVSWITCH |
105 IFF_NO_QUEUE;
106 netdev->needs_free_netdev = true;
107 netdev->priv_destructor = NULL;
108 netdev->ethtool_ops = &internal_dev_ethtool_ops;
109 netdev->rtnl_link_ops = &internal_dev_link_ops;
110
111 netdev->features = NETIF_F_LLTX | NETIF_F_SG | NETIF_F_FRAGLIST |
112 NETIF_F_HIGHDMA | NETIF_F_HW_CSUM |
113 NETIF_F_GSO_SOFTWARE | NETIF_F_GSO_ENCAP_ALL;
114
115 netdev->vlan_features = netdev->features;
116 netdev->hw_enc_features = netdev->features;
117 netdev->features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_STAG_TX;
118 netdev->hw_features = netdev->features & ~NETIF_F_LLTX;
119
120 eth_hw_addr_random(netdev);
121}
122
123static struct vport *internal_dev_create(const struct vport_parms *parms)
124{
125 struct vport *vport;
126 struct internal_dev *internal_dev;
127 struct net_device *dev;
128 int err;
129
130 vport = ovs_vport_alloc(0, &ovs_internal_vport_ops, parms);
131 if (IS_ERR(vport)) {
132 err = PTR_ERR(vport);
133 goto error;
134 }
135
136 dev = alloc_netdev(sizeof(struct internal_dev),
137 parms->name, NET_NAME_USER, do_setup);
138 vport->dev = dev;
139 if (!vport->dev) {
140 err = -ENOMEM;
141 goto error_free_vport;
142 }
143 vport->dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
144 if (!vport->dev->tstats) {
145 err = -ENOMEM;
146 goto error_free_netdev;
147 }
148
149 dev_net_set(vport->dev, ovs_dp_get_net(vport->dp));
150 internal_dev = internal_dev_priv(vport->dev);
151 internal_dev->vport = vport;
152
153 /* Restrict bridge port to current netns. */
154 if (vport->port_no == OVSP_LOCAL)
155 vport->dev->features |= NETIF_F_NETNS_LOCAL;
156
157 rtnl_lock();
158 err = register_netdevice(vport->dev);
159 if (err)
160 goto error_unlock;
161 vport->dev->priv_destructor = internal_dev_destructor;
162
163 dev_set_promiscuity(vport->dev, 1);
164 rtnl_unlock();
165 netif_start_queue(vport->dev);
166
167 return vport;
168
169error_unlock:
170 rtnl_unlock();
171 free_percpu(dev->tstats);
172error_free_netdev:
173 free_netdev(dev);
174error_free_vport:
175 ovs_vport_free(vport);
176error:
177 return ERR_PTR(err);
178}
179
180static void internal_dev_destroy(struct vport *vport)
181{
182 netif_stop_queue(vport->dev);
183 rtnl_lock();
184 dev_set_promiscuity(vport->dev, -1);
185
186 /* unregister_netdevice() waits for an RCU grace period. */
187 unregister_netdevice(vport->dev);
188 free_percpu(vport->dev->tstats);
189 rtnl_unlock();
190}
191
192static netdev_tx_t internal_dev_recv(struct sk_buff *skb)
193{
194 struct net_device *netdev = skb->dev;
195
196 if (unlikely(!(netdev->flags & IFF_UP))) {
197 kfree_skb(skb);
198 netdev->stats.rx_dropped++;
199 return NETDEV_TX_OK;
200 }
201
202 skb_dst_drop(skb);
203 nf_reset_ct(skb);
204 secpath_reset(skb);
205
206 skb->pkt_type = PACKET_HOST;
207 skb->protocol = eth_type_trans(skb, netdev);
208 skb_postpull_rcsum(skb, eth_hdr(skb), ETH_HLEN);
209 dev_sw_netstats_rx_add(netdev, skb->len);
210
211 netif_rx(skb);
212 return NETDEV_TX_OK;
213}
214
215static struct vport_ops ovs_internal_vport_ops = {
216 .type = OVS_VPORT_TYPE_INTERNAL,
217 .create = internal_dev_create,
218 .destroy = internal_dev_destroy,
219 .send = internal_dev_recv,
220};
221
222int ovs_is_internal_dev(const struct net_device *netdev)
223{
224 return netdev->netdev_ops == &internal_dev_netdev_ops;
225}
226
227struct vport *ovs_internal_dev_get_vport(struct net_device *netdev)
228{
229 if (!ovs_is_internal_dev(netdev))
230 return NULL;
231
232 return internal_dev_priv(netdev)->vport;
233}
234
235int ovs_internal_dev_rtnl_link_register(void)
236{
237 int err;
238
239 err = rtnl_link_register(&internal_dev_link_ops);
240 if (err < 0)
241 return err;
242
243 err = ovs_vport_ops_register(&ovs_internal_vport_ops);
244 if (err < 0)
245 rtnl_link_unregister(&internal_dev_link_ops);
246
247 return err;
248}
249
250void ovs_internal_dev_rtnl_link_unregister(void)
251{
252 ovs_vport_ops_unregister(&ovs_internal_vport_ops);
253 rtnl_link_unregister(&internal_dev_link_ops);
254}
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (c) 2007-2012 Nicira, Inc.
4 */
5
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>
12
13#include <net/dst.h>
14#include <net/xfrm.h>
15#include <net/rtnetlink.h>
16
17#include "datapath.h"
18#include "vport-internal_dev.h"
19#include "vport-netdev.h"
20
21struct internal_dev {
22 struct vport *vport;
23};
24
25static struct vport_ops ovs_internal_vport_ops;
26
27static struct internal_dev *internal_dev_priv(struct net_device *netdev)
28{
29 return netdev_priv(netdev);
30}
31
32/* Called with rcu_read_lock_bh. */
33static netdev_tx_t
34internal_dev_xmit(struct sk_buff *skb, struct net_device *netdev)
35{
36 int len, err;
37
38 /* store len value because skb can be freed inside ovs_vport_receive() */
39 len = skb->len;
40
41 rcu_read_lock();
42 err = ovs_vport_receive(internal_dev_priv(netdev)->vport, skb, NULL);
43 rcu_read_unlock();
44
45 if (likely(!err))
46 dev_sw_netstats_tx_add(netdev, 1, len);
47 else
48 netdev->stats.tx_errors++;
49
50 return NETDEV_TX_OK;
51}
52
53static int internal_dev_open(struct net_device *netdev)
54{
55 netif_start_queue(netdev);
56 return 0;
57}
58
59static int internal_dev_stop(struct net_device *netdev)
60{
61 netif_stop_queue(netdev);
62 return 0;
63}
64
65static void internal_dev_getinfo(struct net_device *netdev,
66 struct ethtool_drvinfo *info)
67{
68 strscpy(info->driver, "openvswitch", sizeof(info->driver));
69}
70
71static const struct ethtool_ops internal_dev_ethtool_ops = {
72 .get_drvinfo = internal_dev_getinfo,
73 .get_link = ethtool_op_get_link,
74};
75
76static void internal_dev_destructor(struct net_device *dev)
77{
78 struct vport *vport = ovs_internal_dev_get_vport(dev);
79
80 ovs_vport_free(vport);
81}
82
83static const struct net_device_ops internal_dev_netdev_ops = {
84 .ndo_open = internal_dev_open,
85 .ndo_stop = internal_dev_stop,
86 .ndo_start_xmit = internal_dev_xmit,
87 .ndo_set_mac_address = eth_mac_addr,
88 .ndo_get_stats64 = dev_get_tstats64,
89};
90
91static struct rtnl_link_ops internal_dev_link_ops __read_mostly = {
92 .kind = "openvswitch",
93};
94
95static void do_setup(struct net_device *netdev)
96{
97 ether_setup(netdev);
98
99 netdev->max_mtu = ETH_MAX_MTU;
100
101 netdev->netdev_ops = &internal_dev_netdev_ops;
102
103 netdev->priv_flags &= ~IFF_TX_SKB_SHARING;
104 netdev->priv_flags |= IFF_LIVE_ADDR_CHANGE | IFF_OPENVSWITCH |
105 IFF_NO_QUEUE;
106 netdev->needs_free_netdev = true;
107 netdev->priv_destructor = NULL;
108 netdev->ethtool_ops = &internal_dev_ethtool_ops;
109 netdev->rtnl_link_ops = &internal_dev_link_ops;
110
111 netdev->features = NETIF_F_LLTX | NETIF_F_SG | NETIF_F_FRAGLIST |
112 NETIF_F_HIGHDMA | NETIF_F_HW_CSUM |
113 NETIF_F_GSO_SOFTWARE | NETIF_F_GSO_ENCAP_ALL;
114
115 netdev->vlan_features = netdev->features;
116 netdev->hw_enc_features = netdev->features;
117 netdev->features |= NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_STAG_TX;
118 netdev->hw_features = netdev->features & ~NETIF_F_LLTX;
119
120 eth_hw_addr_random(netdev);
121}
122
123static struct vport *internal_dev_create(const struct vport_parms *parms)
124{
125 struct vport *vport;
126 struct internal_dev *internal_dev;
127 struct net_device *dev;
128 int err;
129
130 vport = ovs_vport_alloc(0, &ovs_internal_vport_ops, parms);
131 if (IS_ERR(vport)) {
132 err = PTR_ERR(vport);
133 goto error;
134 }
135
136 dev = alloc_netdev(sizeof(struct internal_dev),
137 parms->name, NET_NAME_USER, do_setup);
138 vport->dev = dev;
139 if (!vport->dev) {
140 err = -ENOMEM;
141 goto error_free_vport;
142 }
143 vport->dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
144 if (!vport->dev->tstats) {
145 err = -ENOMEM;
146 goto error_free_netdev;
147 }
148
149 dev_net_set(vport->dev, ovs_dp_get_net(vport->dp));
150 dev->ifindex = parms->desired_ifindex;
151 internal_dev = internal_dev_priv(vport->dev);
152 internal_dev->vport = vport;
153
154 /* Restrict bridge port to current netns. */
155 if (vport->port_no == OVSP_LOCAL)
156 vport->dev->features |= NETIF_F_NETNS_LOCAL;
157
158 rtnl_lock();
159 err = register_netdevice(vport->dev);
160 if (err)
161 goto error_unlock;
162 vport->dev->priv_destructor = internal_dev_destructor;
163
164 dev_set_promiscuity(vport->dev, 1);
165 rtnl_unlock();
166 netif_start_queue(vport->dev);
167
168 return vport;
169
170error_unlock:
171 rtnl_unlock();
172 free_percpu(dev->tstats);
173error_free_netdev:
174 free_netdev(dev);
175error_free_vport:
176 ovs_vport_free(vport);
177error:
178 return ERR_PTR(err);
179}
180
181static void internal_dev_destroy(struct vport *vport)
182{
183 netif_stop_queue(vport->dev);
184 rtnl_lock();
185 dev_set_promiscuity(vport->dev, -1);
186
187 /* unregister_netdevice() waits for an RCU grace period. */
188 unregister_netdevice(vport->dev);
189 free_percpu(vport->dev->tstats);
190 rtnl_unlock();
191}
192
193static int internal_dev_recv(struct sk_buff *skb)
194{
195 struct net_device *netdev = skb->dev;
196
197 if (unlikely(!(netdev->flags & IFF_UP))) {
198 kfree_skb(skb);
199 netdev->stats.rx_dropped++;
200 return NETDEV_TX_OK;
201 }
202
203 skb_dst_drop(skb);
204 nf_reset_ct(skb);
205 secpath_reset(skb);
206
207 skb->pkt_type = PACKET_HOST;
208 skb->protocol = eth_type_trans(skb, netdev);
209 skb_postpull_rcsum(skb, eth_hdr(skb), ETH_HLEN);
210 dev_sw_netstats_rx_add(netdev, skb->len);
211
212 netif_rx(skb);
213 return NETDEV_TX_OK;
214}
215
216static struct vport_ops ovs_internal_vport_ops = {
217 .type = OVS_VPORT_TYPE_INTERNAL,
218 .create = internal_dev_create,
219 .destroy = internal_dev_destroy,
220 .send = internal_dev_recv,
221};
222
223int ovs_is_internal_dev(const struct net_device *netdev)
224{
225 return netdev->netdev_ops == &internal_dev_netdev_ops;
226}
227
228struct vport *ovs_internal_dev_get_vport(struct net_device *netdev)
229{
230 if (!ovs_is_internal_dev(netdev))
231 return NULL;
232
233 return internal_dev_priv(netdev)->vport;
234}
235
236int ovs_internal_dev_rtnl_link_register(void)
237{
238 int err;
239
240 err = rtnl_link_register(&internal_dev_link_ops);
241 if (err < 0)
242 return err;
243
244 err = ovs_vport_ops_register(&ovs_internal_vport_ops);
245 if (err < 0)
246 rtnl_link_unregister(&internal_dev_link_ops);
247
248 return err;
249}
250
251void ovs_internal_dev_rtnl_link_unregister(void)
252{
253 ovs_vport_ops_unregister(&ovs_internal_vport_ops);
254 rtnl_link_unregister(&internal_dev_link_ops);
255}