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 /* If the native device stats aren't 64 bit use the vport stats tracking instead. */
26 #define USE_VPORT_STATS (sizeof(((struct net_device_stats *)0)->rx_bytes) < sizeof(u64))
28 static void netdev_port_receive(struct net_bridge_port *, struct sk_buff *);
31 * Used as br_handle_frame_hook. (Cannot run bridge at the same time, even on
32 * different set of devices!)
34 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,22)
35 /* Called with rcu_read_lock and bottom-halves disabled. */
36 static struct sk_buff *
37 netdev_frame_hook(struct net_bridge_port *p, struct sk_buff *skb)
39 netdev_port_receive(p, skb);
42 #elif LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)
43 /* Called with rcu_read_lock and bottom-halves disabled. */
45 netdev_frame_hook(struct net_bridge_port *p, struct sk_buff **pskb)
47 netdev_port_receive(p, *pskb);
57 /* Hook into callback used by the bridge to intercept packets.
58 * Parasites we are. */
59 br_handle_frame_hook = netdev_frame_hook;
67 br_handle_frame_hook = NULL;
71 netdev_create(const char *name, const void __user *config)
74 struct netdev_vport *netdev_vport;
77 vport = vport_alloc(sizeof(struct netdev_vport), &netdev_vport_ops);
83 netdev_vport = netdev_vport_priv(vport);
85 netdev_vport->dev = dev_get_by_name(&init_net, name);
86 if (!netdev_vport->dev) {
88 goto error_free_vport;
91 if (netdev_vport->dev->flags & IFF_LOOPBACK ||
92 netdev_vport->dev->type != ARPHRD_ETHER ||
93 is_internal_dev(netdev_vport->dev)) {
98 if (netdev_vport->dev->br_port) {
103 /* If we are using the vport stats layer initialize it to the current
104 * values so we are roughly consistent with the device stats. */
105 if (USE_VPORT_STATS) {
106 struct odp_vport_stats stats;
108 err = netdev_get_stats(vport, &stats);
110 vport_set_stats(vport, &stats);
116 dev_put(netdev_vport->dev);
124 netdev_destroy(struct vport *vport)
126 struct netdev_vport *netdev_vport = netdev_vport_priv(vport);
128 dev_put(netdev_vport->dev);
135 netdev_attach(struct vport *vport)
137 struct netdev_vport *netdev_vport = netdev_vport_priv(vport);
139 dev_set_promiscuity(netdev_vport->dev, 1);
140 dev_disable_lro(netdev_vport->dev);
141 rcu_assign_pointer(netdev_vport->dev->br_port, (struct net_bridge_port *)vport);
147 netdev_detach(struct vport *vport)
149 struct netdev_vport *netdev_vport = netdev_vport_priv(vport);
151 rcu_assign_pointer(netdev_vport->dev->br_port, NULL);
152 dev_set_promiscuity(netdev_vport->dev, -1);
158 netdev_set_mtu(struct vport *vport, int mtu)
160 struct netdev_vport *netdev_vport = netdev_vport_priv(vport);
161 return dev_set_mtu(netdev_vport->dev, mtu);
165 netdev_set_addr(struct vport *vport, const unsigned char *addr)
167 struct netdev_vport *netdev_vport = netdev_vport_priv(vport);
170 sa.sa_family = ARPHRD_ETHER;
171 memcpy(sa.sa_data, addr, ETH_ALEN);
173 return dev_set_mac_address(netdev_vport->dev, &sa);
177 netdev_get_name(const struct vport *vport)
179 const struct netdev_vport *netdev_vport = netdev_vport_priv(vport);
180 return netdev_vport->dev->name;
183 const unsigned char *
184 netdev_get_addr(const struct vport *vport)
186 const struct netdev_vport *netdev_vport = netdev_vport_priv(vport);
187 return netdev_vport->dev->dev_addr;
191 netdev_get_kobj(const struct vport *vport)
193 const struct netdev_vport *netdev_vport = netdev_vport_priv(vport);
194 return &netdev_vport->dev->NETDEV_DEV_MEMBER.kobj;
198 netdev_get_stats(const struct vport *vport, struct odp_vport_stats *stats)
200 const struct netdev_vport *netdev_vport = netdev_vport_priv(vport);
201 const struct net_device_stats *netdev_stats;
203 netdev_stats = dev_get_stats(netdev_vport->dev);
205 stats->rx_bytes = netdev_stats->rx_bytes;
206 stats->rx_packets = netdev_stats->rx_packets;
207 stats->tx_bytes = netdev_stats->tx_bytes;
208 stats->tx_packets = netdev_stats->tx_packets;
209 stats->rx_dropped = netdev_stats->rx_dropped;
210 stats->rx_errors = netdev_stats->rx_errors;
211 stats->rx_frame_err = netdev_stats->rx_frame_errors;
212 stats->rx_over_err = netdev_stats->rx_over_errors;
213 stats->rx_crc_err = netdev_stats->rx_crc_errors;
214 stats->tx_dropped = netdev_stats->tx_dropped;
215 stats->tx_errors = netdev_stats->tx_errors;
216 stats->collisions = netdev_stats->collisions;
222 netdev_get_dev_flags(const struct vport *vport)
224 const struct netdev_vport *netdev_vport = netdev_vport_priv(vport);
225 return dev_get_flags(netdev_vport->dev);
229 netdev_is_running(const struct vport *vport)
231 const struct netdev_vport *netdev_vport = netdev_vport_priv(vport);
232 return netif_running(netdev_vport->dev);
236 netdev_get_operstate(const struct vport *vport)
238 const struct netdev_vport *netdev_vport = netdev_vport_priv(vport);
239 return netdev_vport->dev->operstate;
243 netdev_get_ifindex(const struct vport *vport)
245 const struct netdev_vport *netdev_vport = netdev_vport_priv(vport);
246 return netdev_vport->dev->ifindex;
250 netdev_get_iflink(const struct vport *vport)
252 const struct netdev_vport *netdev_vport = netdev_vport_priv(vport);
253 return netdev_vport->dev->iflink;
257 netdev_get_mtu(const struct vport *vport)
259 const struct netdev_vport *netdev_vport = netdev_vport_priv(vport);
260 return netdev_vport->dev->mtu;
263 /* Must be called with rcu_read_lock. */
265 netdev_port_receive(struct net_bridge_port *p, struct sk_buff *skb)
267 struct vport *vport = (struct vport *)p;
269 /* Make our own copy of the packet. Otherwise we will mangle the
270 * packet for anyone who came before us (e.g. tcpdump via AF_PACKET).
271 * (No one comes after us, since we tell handle_bridge() that we took
273 skb = skb_share_check(skb, GFP_ATOMIC);
277 /* Push the Ethernet header back on. */
278 skb_push(skb, ETH_HLEN);
279 skb_reset_mac_header(skb);
280 compute_ip_summed(skb, false);
282 vport_receive(vport, skb);
286 netdev_send(struct vport *vport, struct sk_buff *skb)
288 struct netdev_vport *netdev_vport = netdev_vport_priv(vport);
291 skb->dev = netdev_vport->dev;
292 forward_ip_summed(skb);
298 /* Returns null if this device is not attached to a datapath. */
300 netdev_get_vport(struct net_device *dev)
302 return (struct vport *)dev->br_port;
305 struct vport_ops netdev_vport_ops = {
307 .flags = (VPORT_F_REQUIRED |
308 (USE_VPORT_STATS ? VPORT_F_GEN_STATS : 0)),
311 .create = netdev_create,
312 .destroy = netdev_destroy,
313 .attach = netdev_attach,
314 .detach = netdev_detach,
315 .set_mtu = netdev_set_mtu,
316 .set_addr = netdev_set_addr,
317 .get_name = netdev_get_name,
318 .get_addr = netdev_get_addr,
319 .get_kobj = netdev_get_kobj,
320 .get_stats = netdev_get_stats,
321 .get_dev_flags = netdev_get_dev_flags,
322 .is_running = netdev_is_running,
323 .get_operstate = netdev_get_operstate,
324 .get_ifindex = netdev_get_ifindex,
325 .get_iflink = netdev_get_iflink,
326 .get_mtu = netdev_get_mtu,
331 * Open vSwitch cannot safely coexist with the Linux bridge module on any
332 * released version of Linux, because there is only a single bridge hook
333 * function and only a single br_port member in struct net_device.
335 * Declaring and exporting this symbol enforces mutual exclusion. The bridge
336 * module also exports the same symbol, so the module loader will refuse to
337 * load both modules at the same time (e.g. "bridge: exports duplicate symbol
338 * br_should_route_hook (owned by openvswitch_mod)").
340 * The use of "typeof" here avoids the need to track changes in the type of
341 * br_should_route_hook over various kernel versions.
343 typeof(br_should_route_hook) br_should_route_hook;
344 EXPORT_SYMBOL(br_should_route_hook);