blob: 7c8b90bf0e540e971d69603987d218f44583bd1d [file] [log] [blame]
Jesse Grossccb13522011-10-25 19:26:31 -07001/*
Raju Subramaniancaf2ee12012-05-03 18:55:23 -07002 * Copyright (c) 2007-2012 Nicira, Inc.
Jesse Grossccb13522011-10-25 19:26:31 -07003 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of version 2 of the GNU General Public
6 * License as published by the Free Software Foundation.
7 *
8 * This program is distributed in the hope that it will be useful, but
9 * WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 * General Public License for more details.
12 *
13 * You should have received a copy of the GNU General Public License
14 * along with this program; if not, write to the Free Software
15 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
16 * 02110-1301, USA
17 */
18
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>
Jesse Grossccb13522011-10-25 19:26:31 -070026
Jesse Gross7fe99e22012-05-25 11:29:30 -070027#include <net/dst.h>
28#include <net/xfrm.h>
Jiri Pirko5b9e7e12014-06-26 09:58:26 +020029#include <net/rtnetlink.h>
Jesse Gross7fe99e22012-05-25 11:29:30 -070030
Jesse Grossccb13522011-10-25 19:26:31 -070031#include "datapath.h"
32#include "vport-internal_dev.h"
33#include "vport-netdev.h"
34
35struct internal_dev {
36 struct vport *vport;
37};
38
Thomas Graf62b9c8d2014-10-22 17:29:06 +020039static struct vport_ops ovs_internal_vport_ops;
40
Jesse Grossccb13522011-10-25 19:26:31 -070041static struct internal_dev *internal_dev_priv(struct net_device *netdev)
42{
43 return netdev_priv(netdev);
44}
45
Jesse Grossccb13522011-10-25 19:26:31 -070046/* Called with rcu_read_lock_bh. */
47static int internal_dev_xmit(struct sk_buff *skb, struct net_device *netdev)
48{
Pravin B Shelar8c876632015-08-29 17:44:07 -070049 int len, err;
50
51 len = skb->len;
Jesse Grossccb13522011-10-25 19:26:31 -070052 rcu_read_lock();
Pravin B Shelar8c876632015-08-29 17:44:07 -070053 err = ovs_vport_receive(internal_dev_priv(netdev)->vport, skb, NULL);
Jesse Grossccb13522011-10-25 19:26:31 -070054 rcu_read_unlock();
Pravin B Shelar8c876632015-08-29 17:44:07 -070055
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 }
Jesse Grossccb13522011-10-25 19:26:31 -070066 return 0;
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{
Jiri Pirko7826d432013-01-06 00:44:26 +000084 strlcpy(info->driver, "openvswitch", sizeof(info->driver));
Jesse Grossccb13522011-10-25 19:26:31 -070085}
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 int internal_dev_change_mtu(struct net_device *netdev, int new_mtu)
93{
94 if (new_mtu < 68)
95 return -EINVAL;
96
97 netdev->mtu = new_mtu;
98 return 0;
99}
100
101static void internal_dev_destructor(struct net_device *dev)
102{
103 struct vport *vport = ovs_internal_dev_get_vport(dev);
104
105 ovs_vport_free(vport);
106 free_netdev(dev);
107}
108
James Morse12413652015-10-19 16:31:55 +0100109static struct rtnl_link_stats64 *
110internal_get_stats(struct net_device *dev, struct rtnl_link_stats64 *stats)
111{
112 int i;
113
114 memset(stats, 0, sizeof(*stats));
115 stats->rx_errors = dev->stats.rx_errors;
116 stats->tx_errors = dev->stats.tx_errors;
117 stats->tx_dropped = dev->stats.tx_dropped;
118 stats->rx_dropped = dev->stats.rx_dropped;
119
120 for_each_possible_cpu(i) {
121 const struct pcpu_sw_netstats *percpu_stats;
122 struct pcpu_sw_netstats local_stats;
123 unsigned int start;
124
125 percpu_stats = per_cpu_ptr(dev->tstats, i);
126
127 do {
128 start = u64_stats_fetch_begin_irq(&percpu_stats->syncp);
129 local_stats = *percpu_stats;
130 } while (u64_stats_fetch_retry_irq(&percpu_stats->syncp, start));
131
132 stats->rx_bytes += local_stats.rx_bytes;
133 stats->rx_packets += local_stats.rx_packets;
134 stats->tx_bytes += local_stats.tx_bytes;
135 stats->tx_packets += local_stats.tx_packets;
136 }
137
138 return stats;
139}
140
Wu Fengguange014e842016-03-19 00:54:50 +0800141static void internal_set_rx_headroom(struct net_device *dev, int new_hr)
Paolo Abeni3a927bc2016-02-26 10:45:39 +0100142{
143 dev->needed_headroom = new_hr;
144}
145
Jesse Grossccb13522011-10-25 19:26:31 -0700146static const struct net_device_ops internal_dev_netdev_ops = {
147 .ndo_open = internal_dev_open,
148 .ndo_stop = internal_dev_stop,
149 .ndo_start_xmit = internal_dev_xmit,
Thomas Graf91519912012-11-29 20:55:05 +0100150 .ndo_set_mac_address = eth_mac_addr,
Jesse Grossccb13522011-10-25 19:26:31 -0700151 .ndo_change_mtu = internal_dev_change_mtu,
James Morse12413652015-10-19 16:31:55 +0100152 .ndo_get_stats64 = internal_get_stats,
Paolo Abeni3a927bc2016-02-26 10:45:39 +0100153 .ndo_set_rx_headroom = internal_set_rx_headroom,
Jesse Grossccb13522011-10-25 19:26:31 -0700154};
155
Jiri Pirko5b9e7e12014-06-26 09:58:26 +0200156static struct rtnl_link_ops internal_dev_link_ops __read_mostly = {
157 .kind = "openvswitch",
158};
159
Jesse Grossccb13522011-10-25 19:26:31 -0700160static void do_setup(struct net_device *netdev)
161{
162 ether_setup(netdev);
163
164 netdev->netdev_ops = &internal_dev_netdev_ops;
165
166 netdev->priv_flags &= ~IFF_TX_SKB_SHARING;
Paolo Abeni3a927bc2016-02-26 10:45:39 +0100167 netdev->priv_flags |= IFF_LIVE_ADDR_CHANGE | IFF_OPENVSWITCH |
168 IFF_PHONY_HEADROOM;
Jesse Grossccb13522011-10-25 19:26:31 -0700169 netdev->destructor = internal_dev_destructor;
Wilfried Klaebe7ad24ea2014-05-11 00:12:32 +0000170 netdev->ethtool_ops = &internal_dev_ethtool_ops;
Jiri Pirko5b9e7e12014-06-26 09:58:26 +0200171 netdev->rtnl_link_ops = &internal_dev_link_ops;
Jesse Grossccb13522011-10-25 19:26:31 -0700172 netdev->tx_queue_len = 0;
173
174 netdev->features = NETIF_F_LLTX | NETIF_F_SG | NETIF_F_FRAGLIST |
Pravin B Shelarf6eec612014-07-17 15:14:15 -0700175 NETIF_F_HIGHDMA | NETIF_F_HW_CSUM |
176 NETIF_F_GSO_SOFTWARE | NETIF_F_GSO_ENCAP_ALL;
Jesse Grossccb13522011-10-25 19:26:31 -0700177
178 netdev->vlan_features = netdev->features;
Pravin B Shelarf6eec612014-07-17 15:14:15 -0700179 netdev->hw_enc_features = netdev->features;
Patrick McHardyf6469682013-04-19 02:04:27 +0000180 netdev->features |= NETIF_F_HW_VLAN_CTAG_TX;
Jesse Grossccb13522011-10-25 19:26:31 -0700181 netdev->hw_features = netdev->features & ~NETIF_F_LLTX;
Pravin B Shelarf6eec612014-07-17 15:14:15 -0700182
Danny Kukawka7ce5d222012-02-15 06:45:40 +0000183 eth_hw_addr_random(netdev);
Jesse Grossccb13522011-10-25 19:26:31 -0700184}
185
186static struct vport *internal_dev_create(const struct vport_parms *parms)
187{
188 struct vport *vport;
Jesse Grossccb13522011-10-25 19:26:31 -0700189 struct internal_dev *internal_dev;
190 int err;
191
Thomas Grafbe4ace62015-07-21 10:44:04 +0200192 vport = ovs_vport_alloc(0, &ovs_internal_vport_ops, parms);
Jesse Grossccb13522011-10-25 19:26:31 -0700193 if (IS_ERR(vport)) {
194 err = PTR_ERR(vport);
195 goto error;
196 }
197
Thomas Grafbe4ace62015-07-21 10:44:04 +0200198 vport->dev = alloc_netdev(sizeof(struct internal_dev),
199 parms->name, NET_NAME_UNKNOWN, do_setup);
200 if (!vport->dev) {
Jesse Grossccb13522011-10-25 19:26:31 -0700201 err = -ENOMEM;
202 goto error_free_vport;
203 }
James Morse12413652015-10-19 16:31:55 +0100204 vport->dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
205 if (!vport->dev->tstats) {
206 err = -ENOMEM;
207 goto error_free_netdev;
208 }
Paolo Abeni3a927bc2016-02-26 10:45:39 +0100209 vport->dev->needed_headroom = vport->dp->max_headroom;
Jesse Grossccb13522011-10-25 19:26:31 -0700210
Thomas Grafbe4ace62015-07-21 10:44:04 +0200211 dev_net_set(vport->dev, ovs_dp_get_net(vport->dp));
212 internal_dev = internal_dev_priv(vport->dev);
Jesse Grossccb13522011-10-25 19:26:31 -0700213 internal_dev->vport = vport;
214
Pravin B Shelar46df7b82012-02-22 19:58:59 -0800215 /* Restrict bridge port to current netns. */
216 if (vport->port_no == OVSP_LOCAL)
Thomas Grafbe4ace62015-07-21 10:44:04 +0200217 vport->dev->features |= NETIF_F_NETNS_LOCAL;
Pravin B Shelar46df7b82012-02-22 19:58:59 -0800218
Pravin B Shelar8e4e1712013-04-15 13:23:03 -0700219 rtnl_lock();
Thomas Grafbe4ace62015-07-21 10:44:04 +0200220 err = register_netdevice(vport->dev);
Jesse Grossccb13522011-10-25 19:26:31 -0700221 if (err)
James Morse12413652015-10-19 16:31:55 +0100222 goto error_unlock;
Jesse Grossccb13522011-10-25 19:26:31 -0700223
Thomas Grafbe4ace62015-07-21 10:44:04 +0200224 dev_set_promiscuity(vport->dev, 1);
Pravin B Shelar8e4e1712013-04-15 13:23:03 -0700225 rtnl_unlock();
Thomas Grafbe4ace62015-07-21 10:44:04 +0200226 netif_start_queue(vport->dev);
Jesse Grossccb13522011-10-25 19:26:31 -0700227
228 return vport;
229
James Morse12413652015-10-19 16:31:55 +0100230error_unlock:
Pravin B Shelar8e4e1712013-04-15 13:23:03 -0700231 rtnl_unlock();
James Morse12413652015-10-19 16:31:55 +0100232 free_percpu(vport->dev->tstats);
233error_free_netdev:
Thomas Grafbe4ace62015-07-21 10:44:04 +0200234 free_netdev(vport->dev);
Jesse Grossccb13522011-10-25 19:26:31 -0700235error_free_vport:
236 ovs_vport_free(vport);
237error:
238 return ERR_PTR(err);
239}
240
241static void internal_dev_destroy(struct vport *vport)
242{
Thomas Grafbe4ace62015-07-21 10:44:04 +0200243 netif_stop_queue(vport->dev);
Pravin B Shelar8e4e1712013-04-15 13:23:03 -0700244 rtnl_lock();
Thomas Grafbe4ace62015-07-21 10:44:04 +0200245 dev_set_promiscuity(vport->dev, -1);
Jesse Grossccb13522011-10-25 19:26:31 -0700246
247 /* unregister_netdevice() waits for an RCU grace period. */
Thomas Grafbe4ace62015-07-21 10:44:04 +0200248 unregister_netdevice(vport->dev);
James Morse12413652015-10-19 16:31:55 +0100249 free_percpu(vport->dev->tstats);
Pravin B Shelar8e4e1712013-04-15 13:23:03 -0700250 rtnl_unlock();
Jesse Grossccb13522011-10-25 19:26:31 -0700251}
252
Pravin B Shelaraec15922015-10-20 23:00:10 -0700253static netdev_tx_t internal_dev_recv(struct sk_buff *skb)
Jesse Grossccb13522011-10-25 19:26:31 -0700254{
Pravin B Shelaraec15922015-10-20 23:00:10 -0700255 struct net_device *netdev = skb->dev;
Pravin B Shelar8c876632015-08-29 17:44:07 -0700256 struct pcpu_sw_netstats *stats;
Jesse Grossccb13522011-10-25 19:26:31 -0700257
Chunhe Lie1f9c352014-09-08 13:17:21 -0700258 if (unlikely(!(netdev->flags & IFF_UP))) {
259 kfree_skb(skb);
Pravin B Shelar8c876632015-08-29 17:44:07 -0700260 netdev->stats.rx_dropped++;
Pravin B Shelaraec15922015-10-20 23:00:10 -0700261 return NETDEV_TX_OK;
Chunhe Lie1f9c352014-09-08 13:17:21 -0700262 }
263
Jesse Gross7fe99e22012-05-25 11:29:30 -0700264 skb_dst_drop(skb);
265 nf_reset(skb);
266 secpath_reset(skb);
267
Jesse Grossccb13522011-10-25 19:26:31 -0700268 skb->pkt_type = PACKET_HOST;
269 skb->protocol = eth_type_trans(skb, netdev);
Pravin B Shelarb34df5e2013-06-13 11:11:44 -0700270 skb_postpull_rcsum(skb, eth_hdr(skb), ETH_HLEN);
Jesse Grossccb13522011-10-25 19:26:31 -0700271
Pravin B Shelar8c876632015-08-29 17:44:07 -0700272 stats = this_cpu_ptr(netdev->tstats);
273 u64_stats_update_begin(&stats->syncp);
274 stats->rx_packets++;
275 stats->rx_bytes += skb->len;
276 u64_stats_update_end(&stats->syncp);
Jesse Grossccb13522011-10-25 19:26:31 -0700277
Pravin B Shelar8c876632015-08-29 17:44:07 -0700278 netif_rx(skb);
Pravin B Shelaraec15922015-10-20 23:00:10 -0700279 return NETDEV_TX_OK;
Jesse Grossccb13522011-10-25 19:26:31 -0700280}
281
Thomas Graf62b9c8d2014-10-22 17:29:06 +0200282static struct vport_ops ovs_internal_vport_ops = {
Jesse Grossccb13522011-10-25 19:26:31 -0700283 .type = OVS_VPORT_TYPE_INTERNAL,
284 .create = internal_dev_create,
285 .destroy = internal_dev_destroy,
Jesse Grossccb13522011-10-25 19:26:31 -0700286 .send = internal_dev_recv,
287};
288
289int ovs_is_internal_dev(const struct net_device *netdev)
290{
291 return netdev->netdev_ops == &internal_dev_netdev_ops;
292}
293
294struct vport *ovs_internal_dev_get_vport(struct net_device *netdev)
295{
296 if (!ovs_is_internal_dev(netdev))
297 return NULL;
298
299 return internal_dev_priv(netdev)->vport;
300}
Jiri Pirko5b9e7e12014-06-26 09:58:26 +0200301
302int ovs_internal_dev_rtnl_link_register(void)
303{
Thomas Graf62b9c8d2014-10-22 17:29:06 +0200304 int err;
305
306 err = rtnl_link_register(&internal_dev_link_ops);
307 if (err < 0)
308 return err;
309
310 err = ovs_vport_ops_register(&ovs_internal_vport_ops);
311 if (err < 0)
312 rtnl_link_unregister(&internal_dev_link_ops);
313
314 return err;
Jiri Pirko5b9e7e12014-06-26 09:58:26 +0200315}
316
317void ovs_internal_dev_rtnl_link_unregister(void)
318{
Thomas Graf62b9c8d2014-10-22 17:29:06 +0200319 ovs_vport_ops_unregister(&ovs_internal_vport_ops);
Jiri Pirko5b9e7e12014-06-26 09:58:26 +0200320 rtnl_link_unregister(&internal_dev_link_ops);
321}