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 struct vport_ops netdev_vport_ops;
27 static void netdev_port_receive(struct net_bridge_port *, struct sk_buff *);
30 * Used as br_handle_frame_hook. (Cannot run bridge at the same time, even on
31 * different set of devices!)
33 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,22)
34 /* Called with rcu_read_lock and bottom-halves disabled. */
35 static struct sk_buff *
36 netdev_frame_hook(struct net_bridge_port *p, struct sk_buff *skb)
38 netdev_port_receive(p, skb);
41 #elif LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)
42 /* Called with rcu_read_lock and bottom-halves disabled. */
44 netdev_frame_hook(struct net_bridge_port *p, struct sk_buff **pskb)
46 netdev_port_receive(p, *pskb);
56 /* Hook into callback used by the bridge to intercept packets.
57 * Parasites we are. */
58 br_handle_frame_hook = netdev_frame_hook;
66 br_handle_frame_hook = NULL;
70 netdev_create(const char *name, const void __user *config)
73 struct netdev_vport *netdev_vport;
76 vport = vport_alloc(sizeof(struct netdev_vport), &netdev_vport_ops);
82 netdev_vport = netdev_vport_priv(vport);
84 netdev_vport->dev = dev_get_by_name(&init_net, name);
85 if (!netdev_vport->dev) {
87 goto error_free_vport;
90 if (netdev_vport->dev->flags & IFF_LOOPBACK ||
91 netdev_vport->dev->type != ARPHRD_ETHER ||
92 is_internal_dev(netdev_vport->dev)) {
97 if (netdev_vport->dev->br_port) {
105 dev_put(netdev_vport->dev);
113 netdev_destroy(struct vport *vport)
115 struct netdev_vport *netdev_vport = netdev_vport_priv(vport);
117 dev_put(netdev_vport->dev);
124 netdev_attach(struct vport *vport)
126 struct netdev_vport *netdev_vport = netdev_vport_priv(vport);
128 dev_set_promiscuity(netdev_vport->dev, 1);
129 dev_disable_lro(netdev_vport->dev);
130 rcu_assign_pointer(netdev_vport->dev->br_port, (struct net_bridge_port *)vport);
136 netdev_detach(struct vport *vport)
138 struct netdev_vport *netdev_vport = netdev_vport_priv(vport);
140 rcu_assign_pointer(netdev_vport->dev->br_port, NULL);
141 dev_set_promiscuity(netdev_vport->dev, -1);
147 netdev_set_mtu(struct vport *vport, int mtu)
149 struct netdev_vport *netdev_vport = netdev_vport_priv(vport);
150 return dev_set_mtu(netdev_vport->dev, mtu);
154 netdev_set_addr(struct vport *vport, const unsigned char *addr)
156 struct netdev_vport *netdev_vport = netdev_vport_priv(vport);
159 sa.sa_family = ARPHRD_ETHER;
160 memcpy(sa.sa_data, addr, ETH_ALEN);
162 return dev_set_mac_address(netdev_vport->dev, &sa);
166 netdev_get_name(const struct vport *vport)
168 const struct netdev_vport *netdev_vport = netdev_vport_priv(vport);
169 return netdev_vport->dev->name;
172 const unsigned char *
173 netdev_get_addr(const struct vport *vport)
175 const struct netdev_vport *netdev_vport = netdev_vport_priv(vport);
176 return netdev_vport->dev->dev_addr;
180 netdev_get_kobj(const struct vport *vport)
182 const struct netdev_vport *netdev_vport = netdev_vport_priv(vport);
183 return &netdev_vport->dev->NETDEV_DEV_MEMBER.kobj;
187 netdev_get_stats(const struct vport *vport, struct odp_vport_stats *stats)
189 const struct netdev_vport *netdev_vport = netdev_vport_priv(vport);
190 const struct net_device_stats *netdev_stats;
192 netdev_stats = dev_get_stats(netdev_vport->dev);
194 stats->rx_bytes = netdev_stats->rx_bytes;
195 stats->rx_packets = netdev_stats->rx_packets;
196 stats->tx_bytes = netdev_stats->tx_bytes;
197 stats->tx_packets = netdev_stats->tx_packets;
198 stats->rx_dropped = netdev_stats->rx_dropped;
199 stats->rx_errors = netdev_stats->rx_errors;
200 stats->rx_frame_err = netdev_stats->rx_frame_errors;
201 stats->rx_over_err = netdev_stats->rx_over_errors;
202 stats->rx_crc_err = netdev_stats->rx_crc_errors;
203 stats->tx_dropped = netdev_stats->tx_dropped;
204 stats->tx_errors = netdev_stats->tx_errors;
205 stats->collisions = netdev_stats->collisions;
211 netdev_get_dev_flags(const struct vport *vport)
213 const struct netdev_vport *netdev_vport = netdev_vport_priv(vport);
214 return dev_get_flags(netdev_vport->dev);
218 netdev_is_running(const struct vport *vport)
220 const struct netdev_vport *netdev_vport = netdev_vport_priv(vport);
221 return netif_running(netdev_vport->dev);
225 netdev_get_operstate(const struct vport *vport)
227 const struct netdev_vport *netdev_vport = netdev_vport_priv(vport);
228 return netdev_vport->dev->operstate;
232 netdev_get_ifindex(const struct vport *vport)
234 const struct netdev_vport *netdev_vport = netdev_vport_priv(vport);
235 return netdev_vport->dev->ifindex;
239 netdev_get_iflink(const struct vport *vport)
241 const struct netdev_vport *netdev_vport = netdev_vport_priv(vport);
242 return netdev_vport->dev->iflink;
246 netdev_get_mtu(const struct vport *vport)
248 const struct netdev_vport *netdev_vport = netdev_vport_priv(vport);
249 return netdev_vport->dev->mtu;
252 /* Must be called with rcu_read_lock. */
254 netdev_port_receive(struct net_bridge_port *p, struct sk_buff *skb)
256 struct vport *vport = (struct vport *)p;
258 /* Make our own copy of the packet. Otherwise we will mangle the
259 * packet for anyone who came before us (e.g. tcpdump via AF_PACKET).
260 * (No one comes after us, since we tell handle_bridge() that we took
262 skb = skb_share_check(skb, GFP_ATOMIC);
266 /* Push the Ethernet header back on. */
267 skb_push(skb, ETH_HLEN);
268 skb_reset_mac_header(skb);
269 compute_ip_summed(skb, false);
271 vport_receive(vport, skb);
275 netdev_send(struct vport *vport, struct sk_buff *skb)
277 struct netdev_vport *netdev_vport = netdev_vport_priv(vport);
280 skb->dev = netdev_vport->dev;
281 forward_ip_summed(skb);
287 /* Returns null if this device is not attached to a datapath. */
289 netdev_get_vport(struct net_device *dev)
291 return (struct vport *)dev->br_port;
294 struct vport_ops netdev_vport_ops = {
296 .flags = VPORT_F_REQUIRED,
299 .create = netdev_create,
300 .destroy = netdev_destroy,
301 .attach = netdev_attach,
302 .detach = netdev_detach,
303 .set_mtu = netdev_set_mtu,
304 .set_addr = netdev_set_addr,
305 .get_name = netdev_get_name,
306 .get_addr = netdev_get_addr,
307 .get_kobj = netdev_get_kobj,
308 .get_stats = netdev_get_stats,
309 .get_dev_flags = netdev_get_dev_flags,
310 .is_running = netdev_is_running,
311 .get_operstate = netdev_get_operstate,
312 .get_ifindex = netdev_get_ifindex,
313 .get_iflink = netdev_get_iflink,
314 .get_mtu = netdev_get_mtu,
319 * Open vSwitch cannot safely coexist with the Linux bridge module on any
320 * released version of Linux, because there is only a single bridge hook
321 * function and only a single br_port member in struct net_device.
323 * Declaring and exporting this symbol enforces mutual exclusion. The bridge
324 * module also exports the same symbol, so the module loader will refuse to
325 * load both modules at the same time (e.g. "bridge: exports duplicate symbol
326 * br_should_route_hook (owned by openvswitch_mod)").
328 * The use of "typeof" here avoids the need to track changes in the type of
329 * br_should_route_hook over various kernel versions.
331 typeof(br_should_route_hook) br_should_route_hook;
332 EXPORT_SYMBOL(br_should_route_hook);