2 * Copyright (c) 2010 Nicira Networks.
3 * Distributed under the terms of the GNU GPL version 2.
5 * Significant portions of this file may be copied from parts of the Linux
6 * kernel, by Linus Torvalds and others.
9 #include <linux/if_arp.h>
10 #include <linux/if_bridge.h>
11 #include <linux/if_vlan.h>
12 #include <linux/kernel.h>
13 #include <linux/llc.h>
14 #include <linux/rtnetlink.h>
15 #include <linux/skbuff.h>
20 #include "vport-internal_dev.h"
21 #include "vport-netdev.h"
25 static void netdev_port_receive(struct net_bridge_port *, struct sk_buff *);
28 * Used as br_handle_frame_hook. (Cannot run bridge at the same time, even on
29 * different set of devices!)
31 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,22)
32 /* Called with rcu_read_lock and bottom-halves disabled. */
33 static struct sk_buff *
34 netdev_frame_hook(struct net_bridge_port *p, struct sk_buff *skb)
36 netdev_port_receive(p, skb);
39 #elif LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)
40 /* Called with rcu_read_lock and bottom-halves disabled. */
42 netdev_frame_hook(struct net_bridge_port *p, struct sk_buff **pskb)
44 netdev_port_receive(p, *pskb);
54 /* Hook into callback used by the bridge to intercept packets.
55 * Parasites we are. */
56 br_handle_frame_hook = netdev_frame_hook;
64 br_handle_frame_hook = NULL;
68 netdev_create(const char *name, const void __user *config)
71 struct netdev_vport *netdev_vport;
74 vport = vport_alloc(sizeof(struct netdev_vport), &netdev_vport_ops);
80 netdev_vport = netdev_vport_priv(vport);
82 netdev_vport->dev = dev_get_by_name(&init_net, name);
83 if (!netdev_vport->dev) {
85 goto error_free_vport;
88 if (netdev_vport->dev->flags & IFF_LOOPBACK ||
89 netdev_vport->dev->type != ARPHRD_ETHER ||
90 is_internal_dev(netdev_vport->dev)) {
95 if (netdev_vport->dev->br_port) {
103 dev_put(netdev_vport->dev);
111 netdev_destroy(struct vport *vport)
113 struct netdev_vport *netdev_vport = netdev_vport_priv(vport);
115 dev_put(netdev_vport->dev);
122 netdev_attach(struct vport *vport)
124 struct netdev_vport *netdev_vport = netdev_vport_priv(vport);
126 dev_set_promiscuity(netdev_vport->dev, 1);
127 dev_disable_lro(netdev_vport->dev);
128 rcu_assign_pointer(netdev_vport->dev->br_port, (struct net_bridge_port *)vport);
134 netdev_detach(struct vport *vport)
136 struct netdev_vport *netdev_vport = netdev_vport_priv(vport);
138 rcu_assign_pointer(netdev_vport->dev->br_port, NULL);
139 dev_set_promiscuity(netdev_vport->dev, -1);
145 netdev_set_mtu(struct vport *vport, int mtu)
147 struct netdev_vport *netdev_vport = netdev_vport_priv(vport);
148 return dev_set_mtu(netdev_vport->dev, mtu);
152 netdev_set_addr(struct vport *vport, const unsigned char *addr)
154 struct netdev_vport *netdev_vport = netdev_vport_priv(vport);
157 sa.sa_family = ARPHRD_ETHER;
158 memcpy(sa.sa_data, addr, ETH_ALEN);
160 return dev_set_mac_address(netdev_vport->dev, &sa);
164 netdev_get_name(const struct vport *vport)
166 const struct netdev_vport *netdev_vport = netdev_vport_priv(vport);
167 return netdev_vport->dev->name;
170 const unsigned char *
171 netdev_get_addr(const struct vport *vport)
173 const struct netdev_vport *netdev_vport = netdev_vport_priv(vport);
174 return netdev_vport->dev->dev_addr;
178 netdev_get_kobj(const struct vport *vport)
180 const struct netdev_vport *netdev_vport = netdev_vport_priv(vport);
181 return &netdev_vport->dev->NETDEV_DEV_MEMBER.kobj;
185 netdev_get_stats(const struct vport *vport, struct odp_vport_stats *stats)
187 const struct netdev_vport *netdev_vport = netdev_vport_priv(vport);
188 const struct net_device_stats *netdev_stats;
190 netdev_stats = dev_get_stats(netdev_vport->dev);
192 stats->rx_bytes = netdev_stats->rx_bytes;
193 stats->rx_packets = netdev_stats->rx_packets;
194 stats->tx_bytes = netdev_stats->tx_bytes;
195 stats->tx_packets = netdev_stats->tx_packets;
196 stats->rx_dropped = netdev_stats->rx_dropped;
197 stats->rx_errors = netdev_stats->rx_errors;
198 stats->rx_frame_err = netdev_stats->rx_frame_errors;
199 stats->rx_over_err = netdev_stats->rx_over_errors;
200 stats->rx_crc_err = netdev_stats->rx_crc_errors;
201 stats->tx_dropped = netdev_stats->tx_dropped;
202 stats->tx_errors = netdev_stats->tx_errors;
203 stats->collisions = netdev_stats->collisions;
209 netdev_get_dev_flags(const struct vport *vport)
211 const struct netdev_vport *netdev_vport = netdev_vport_priv(vport);
212 return dev_get_flags(netdev_vport->dev);
216 netdev_is_running(const struct vport *vport)
218 const struct netdev_vport *netdev_vport = netdev_vport_priv(vport);
219 return netif_running(netdev_vport->dev);
223 netdev_get_operstate(const struct vport *vport)
225 const struct netdev_vport *netdev_vport = netdev_vport_priv(vport);
226 return netdev_vport->dev->operstate;
230 netdev_get_ifindex(const struct vport *vport)
232 const struct netdev_vport *netdev_vport = netdev_vport_priv(vport);
233 return netdev_vport->dev->ifindex;
237 netdev_get_iflink(const struct vport *vport)
239 const struct netdev_vport *netdev_vport = netdev_vport_priv(vport);
240 return netdev_vport->dev->iflink;
244 netdev_get_mtu(const struct vport *vport)
246 const struct netdev_vport *netdev_vport = netdev_vport_priv(vport);
247 return netdev_vport->dev->mtu;
250 /* Must be called with rcu_read_lock. */
252 netdev_port_receive(struct net_bridge_port *p, struct sk_buff *skb)
254 struct vport *vport = (struct vport *)p;
256 /* Make our own copy of the packet. Otherwise we will mangle the
257 * packet for anyone who came before us (e.g. tcpdump via AF_PACKET).
258 * (No one comes after us, since we tell handle_bridge() that we took
260 skb = skb_share_check(skb, GFP_ATOMIC);
264 /* Push the Ethernet header back on. */
265 skb_push(skb, ETH_HLEN);
266 skb_reset_mac_header(skb);
267 compute_ip_summed(skb, false);
269 vport_receive(vport, skb);
273 netdev_send(struct vport *vport, struct sk_buff *skb)
275 struct netdev_vport *netdev_vport = netdev_vport_priv(vport);
278 skb->dev = netdev_vport->dev;
279 forward_ip_summed(skb);
285 /* Returns null if this device is not attached to a datapath. */
287 netdev_get_vport(struct net_device *dev)
289 return (struct vport *)dev->br_port;
292 struct vport_ops netdev_vport_ops = {
294 .flags = VPORT_F_REQUIRED,
297 .create = netdev_create,
298 .destroy = netdev_destroy,
299 .attach = netdev_attach,
300 .detach = netdev_detach,
301 .set_mtu = netdev_set_mtu,
302 .set_addr = netdev_set_addr,
303 .get_name = netdev_get_name,
304 .get_addr = netdev_get_addr,
305 .get_kobj = netdev_get_kobj,
306 .get_stats = netdev_get_stats,
307 .get_dev_flags = netdev_get_dev_flags,
308 .is_running = netdev_is_running,
309 .get_operstate = netdev_get_operstate,
310 .get_ifindex = netdev_get_ifindex,
311 .get_iflink = netdev_get_iflink,
312 .get_mtu = netdev_get_mtu,
317 * Open vSwitch cannot safely coexist with the Linux bridge module on any
318 * released version of Linux, because there is only a single bridge hook
319 * function and only a single br_port member in struct net_device.
321 * Declaring and exporting this symbol enforces mutual exclusion. The bridge
322 * module also exports the same symbol, so the module loader will refuse to
323 * load both modules at the same time (e.g. "bridge: exports duplicate symbol
324 * br_should_route_hook (owned by openvswitch_mod)").
326 * The use of "typeof" here avoids the need to track changes in the type of
327 * br_should_route_hook over various kernel versions.
329 typeof(br_should_route_hook) br_should_route_hook;
330 EXPORT_SYMBOL(br_should_route_hook);