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