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};
 89
 90static struct rtnl_link_ops internal_dev_link_ops __read_mostly = {
 91	.kind = "openvswitch",
 92};
 93
 94static void do_setup(struct net_device *netdev)
 95{
 96	ether_setup(netdev);
 97
 98	netdev->max_mtu = ETH_MAX_MTU;
 99
100	netdev->netdev_ops = &internal_dev_netdev_ops;
101
102	netdev->priv_flags &= ~IFF_TX_SKB_SHARING;
103	netdev->priv_flags |= IFF_LIVE_ADDR_CHANGE | IFF_OPENVSWITCH |
104			      IFF_NO_QUEUE;
105	netdev->lltx = true;
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_SG | NETIF_F_FRAGLIST | NETIF_F_HIGHDMA |
112			   NETIF_F_HW_CSUM | NETIF_F_GSO_SOFTWARE |
113			   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;
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	dev->pcpu_stat_type = NETDEV_PCPU_STAT_TSTATS;
 
 
 
 
144
145	dev_net_set(vport->dev, ovs_dp_get_net(vport->dp));
146	dev->ifindex = parms->desired_ifindex;
147	internal_dev = internal_dev_priv(vport->dev);
148	internal_dev->vport = vport;
149
150	/* Restrict bridge port to current netns. */
151	if (vport->port_no == OVSP_LOCAL)
152		vport->dev->netns_local = true;
153
154	rtnl_lock();
155	err = register_netdevice(vport->dev);
156	if (err)
157		goto error_unlock;
158	vport->dev->priv_destructor = internal_dev_destructor;
159
160	dev_set_promiscuity(vport->dev, 1);
161	rtnl_unlock();
162	netif_start_queue(vport->dev);
163
164	return vport;
165
166error_unlock:
167	rtnl_unlock();
 
 
168	free_netdev(dev);
169error_free_vport:
170	ovs_vport_free(vport);
171error:
172	return ERR_PTR(err);
173}
174
175static void internal_dev_destroy(struct vport *vport)
176{
177	netif_stop_queue(vport->dev);
178	rtnl_lock();
179	dev_set_promiscuity(vport->dev, -1);
180
181	/* unregister_netdevice() waits for an RCU grace period. */
182	unregister_netdevice(vport->dev);
 
183	rtnl_unlock();
184}
185
186static int internal_dev_recv(struct sk_buff *skb)
187{
188	struct net_device *netdev = skb->dev;
189
190	if (unlikely(!(netdev->flags & IFF_UP))) {
191		kfree_skb(skb);
192		netdev->stats.rx_dropped++;
193		return NETDEV_TX_OK;
194	}
195
196	skb_dst_drop(skb);
197	nf_reset_ct(skb);
 
198
199	skb->pkt_type = PACKET_HOST;
200	skb->protocol = eth_type_trans(skb, netdev);
201	skb_postpull_rcsum(skb, eth_hdr(skb), ETH_HLEN);
202	dev_sw_netstats_rx_add(netdev, skb->len);
203
204	netif_rx(skb);
205	return NETDEV_TX_OK;
206}
207
208static struct vport_ops ovs_internal_vport_ops = {
209	.type		= OVS_VPORT_TYPE_INTERNAL,
210	.create		= internal_dev_create,
211	.destroy	= internal_dev_destroy,
212	.send		= internal_dev_recv,
213};
214
215int ovs_is_internal_dev(const struct net_device *netdev)
216{
217	return netdev->netdev_ops == &internal_dev_netdev_ops;
218}
219
220struct vport *ovs_internal_dev_get_vport(struct net_device *netdev)
221{
222	if (!ovs_is_internal_dev(netdev))
223		return NULL;
224
225	return internal_dev_priv(netdev)->vport;
226}
227
228int ovs_internal_dev_rtnl_link_register(void)
229{
230	int err;
231
232	err = rtnl_link_register(&internal_dev_link_ops);
233	if (err < 0)
234		return err;
235
236	err = ovs_vport_ops_register(&ovs_internal_vport_ops);
237	if (err < 0)
238		rtnl_link_unregister(&internal_dev_link_ops);
239
240	return err;
241}
242
243void ovs_internal_dev_rtnl_link_unregister(void)
244{
245	ovs_vport_ops_unregister(&ovs_internal_vport_ops);
246	rtnl_link_unregister(&internal_dev_link_ops);
247}