blob: 376e3e94bae075814c90082e692290c9c301ce58 [file] [log] [blame]
Patrick McHardyb863ceb2007-07-14 18:55:06 -07001/*
2 * Copyright (c) 2007 Patrick McHardy <kaber@trash.net>
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License as
6 * published by the Free Software Foundation; either version 2 of
7 * the License, or (at your option) any later version.
8 *
9 * The code this is based on carried the following copyright notice:
10 * ---
11 * (C) Copyright 2001-2006
12 * Alex Zeffertt, Cambridge Broadband Ltd, ajz@cambridgebroadband.com
13 * Re-worked by Ben Greear <greearb@candelatech.com>
14 * ---
15 */
16#include <linux/kernel.h>
17#include <linux/types.h>
18#include <linux/module.h>
19#include <linux/init.h>
20#include <linux/errno.h>
21#include <linux/slab.h>
22#include <linux/string.h>
Franck Bui-Huu82524742008-05-12 21:21:05 +020023#include <linux/rculist.h>
Patrick McHardyb863ceb2007-07-14 18:55:06 -070024#include <linux/notifier.h>
25#include <linux/netdevice.h>
26#include <linux/etherdevice.h>
27#include <linux/ethtool.h>
28#include <linux/if_arp.h>
29#include <linux/if_link.h>
30#include <linux/if_macvlan.h>
31#include <net/rtnetlink.h>
Arnd Bergmann618e1b72009-11-26 06:07:10 +000032#include <net/xfrm.h>
Patrick McHardyb863ceb2007-07-14 18:55:06 -070033
34#define MACVLAN_HASH_SIZE (1 << BITS_PER_BYTE)
35
36struct macvlan_port {
37 struct net_device *dev;
38 struct hlist_head vlan_hash[MACVLAN_HASH_SIZE];
39 struct list_head vlans;
Jiri Pirko8b37ef02010-06-07 01:36:29 +000040 struct rcu_head rcu;
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +000041 bool passthru;
Eric W. Biedermand5cd92442011-03-21 18:22:22 -070042 int count;
Patrick McHardyb863ceb2007-07-14 18:55:06 -070043};
44
Eric W. Biedermand5cd92442011-03-21 18:22:22 -070045static void macvlan_port_destroy(struct net_device *dev);
46
Jiri Pirkoa35e2c12010-06-15 03:27:57 +000047#define macvlan_port_get_rcu(dev) \
48 ((struct macvlan_port *) rcu_dereference(dev->rx_handler_data))
49#define macvlan_port_get(dev) ((struct macvlan_port *) dev->rx_handler_data)
50#define macvlan_port_exists(dev) (dev->priv_flags & IFF_MACVLAN_PORT)
51
Patrick McHardyb863ceb2007-07-14 18:55:06 -070052static struct macvlan_dev *macvlan_hash_lookup(const struct macvlan_port *port,
53 const unsigned char *addr)
54{
55 struct macvlan_dev *vlan;
56 struct hlist_node *n;
57
58 hlist_for_each_entry_rcu(vlan, n, &port->vlan_hash[addr[5]], hlist) {
Eric Dumazetac067132009-09-01 05:46:05 +000059 if (!compare_ether_addr_64bits(vlan->dev->dev_addr, addr))
Patrick McHardyb863ceb2007-07-14 18:55:06 -070060 return vlan;
61 }
62 return NULL;
63}
64
Eric Biedermanf9ac30f2009-03-13 13:16:13 -070065static void macvlan_hash_add(struct macvlan_dev *vlan)
66{
67 struct macvlan_port *port = vlan->port;
68 const unsigned char *addr = vlan->dev->dev_addr;
69
70 hlist_add_head_rcu(&vlan->hlist, &port->vlan_hash[addr[5]]);
71}
72
Eric Dumazet449f4542011-05-19 12:24:16 +000073static void macvlan_hash_del(struct macvlan_dev *vlan, bool sync)
Eric Biedermanf9ac30f2009-03-13 13:16:13 -070074{
75 hlist_del_rcu(&vlan->hlist);
Eric Dumazet449f4542011-05-19 12:24:16 +000076 if (sync)
77 synchronize_rcu();
Eric Biedermanf9ac30f2009-03-13 13:16:13 -070078}
79
80static void macvlan_hash_change_addr(struct macvlan_dev *vlan,
81 const unsigned char *addr)
82{
Eric Dumazet449f4542011-05-19 12:24:16 +000083 macvlan_hash_del(vlan, true);
Eric Biedermanf9ac30f2009-03-13 13:16:13 -070084 /* Now that we are unhashed it is safe to change the device
85 * address without confusing packet delivery.
86 */
87 memcpy(vlan->dev->dev_addr, addr, ETH_ALEN);
88 macvlan_hash_add(vlan);
89}
90
91static int macvlan_addr_busy(const struct macvlan_port *port,
92 const unsigned char *addr)
93{
94 /* Test to see if the specified multicast address is
95 * currently in use by the underlying device or
96 * another macvlan.
97 */
Eric Dumazetac067132009-09-01 05:46:05 +000098 if (!compare_ether_addr_64bits(port->dev->dev_addr, addr))
Eric Biedermanf9ac30f2009-03-13 13:16:13 -070099 return 1;
100
101 if (macvlan_hash_lookup(port, addr))
102 return 1;
103
104 return 0;
105}
106
Arnd Bergmanna1e514c2009-11-26 06:07:09 +0000107
Arnd Bergmannfc0663d2010-01-30 12:23:40 +0000108static int macvlan_broadcast_one(struct sk_buff *skb,
109 const struct macvlan_dev *vlan,
Arnd Bergmann618e1b72009-11-26 06:07:10 +0000110 const struct ethhdr *eth, bool local)
Arnd Bergmanna1e514c2009-11-26 06:07:09 +0000111{
Arnd Bergmannfc0663d2010-01-30 12:23:40 +0000112 struct net_device *dev = vlan->dev;
Arnd Bergmanna1e514c2009-11-26 06:07:09 +0000113 if (!skb)
114 return NET_RX_DROP;
115
Arnd Bergmann618e1b72009-11-26 06:07:10 +0000116 if (local)
Arnd Bergmannfc0663d2010-01-30 12:23:40 +0000117 return vlan->forward(dev, skb);
Arnd Bergmann618e1b72009-11-26 06:07:10 +0000118
Arnd Bergmanna1e514c2009-11-26 06:07:09 +0000119 skb->dev = dev;
120 if (!compare_ether_addr_64bits(eth->h_dest,
121 dev->broadcast))
122 skb->pkt_type = PACKET_BROADCAST;
123 else
124 skb->pkt_type = PACKET_MULTICAST;
125
Arnd Bergmannfc0663d2010-01-30 12:23:40 +0000126 return vlan->receive(skb);
Arnd Bergmanna1e514c2009-11-26 06:07:09 +0000127}
128
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700129static void macvlan_broadcast(struct sk_buff *skb,
Arnd Bergmann618e1b72009-11-26 06:07:10 +0000130 const struct macvlan_port *port,
131 struct net_device *src,
132 enum macvlan_mode mode)
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700133{
134 const struct ethhdr *eth = eth_hdr(skb);
135 const struct macvlan_dev *vlan;
136 struct hlist_node *n;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700137 struct sk_buff *nskb;
138 unsigned int i;
Arnd Bergmanna1e514c2009-11-26 06:07:09 +0000139 int err;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700140
Patrick McHardyefbbced2008-11-26 15:30:48 -0800141 if (skb->protocol == htons(ETH_P_PAUSE))
142 return;
143
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700144 for (i = 0; i < MACVLAN_HASH_SIZE; i++) {
145 hlist_for_each_entry_rcu(vlan, n, &port->vlan_hash[i], hlist) {
Arnd Bergmann618e1b72009-11-26 06:07:10 +0000146 if (vlan->dev == src || !(vlan->mode & mode))
147 continue;
148
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700149 nskb = skb_clone(skb, GFP_ATOMIC);
Arnd Bergmannfc0663d2010-01-30 12:23:40 +0000150 err = macvlan_broadcast_one(nskb, vlan, eth,
Arnd Bergmann618e1b72009-11-26 06:07:10 +0000151 mode == MACVLAN_MODE_BRIDGE);
Arnd Bergmanna1e514c2009-11-26 06:07:09 +0000152 macvlan_count_rx(vlan, skb->len + ETH_HLEN,
153 err == NET_RX_SUCCESS, 1);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700154 }
155 }
156}
157
158/* called under rcu_read_lock() from netif_receive_skb */
Jiri Pirko8a4eb572011-03-12 03:14:39 +0000159static rx_handler_result_t macvlan_handle_frame(struct sk_buff **pskb)
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700160{
Jiri Pirkoab95bfe2010-06-01 21:52:08 +0000161 struct macvlan_port *port;
Jiri Pirko8a4eb572011-03-12 03:14:39 +0000162 struct sk_buff *skb = *pskb;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700163 const struct ethhdr *eth = eth_hdr(skb);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700164 const struct macvlan_dev *vlan;
Arnd Bergmann618e1b72009-11-26 06:07:10 +0000165 const struct macvlan_dev *src;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700166 struct net_device *dev;
Sridhar Samudralaba018772010-07-27 09:10:07 +0000167 unsigned int len = 0;
168 int ret = NET_RX_DROP;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700169
Jiri Pirkoa35e2c12010-06-15 03:27:57 +0000170 port = macvlan_port_get_rcu(skb->dev);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700171 if (is_multicast_ether_addr(eth->h_dest)) {
Arnd Bergmann618e1b72009-11-26 06:07:10 +0000172 src = macvlan_hash_lookup(port, eth->h_source);
173 if (!src)
174 /* frame comes from an external address */
175 macvlan_broadcast(skb, port, NULL,
176 MACVLAN_MODE_PRIVATE |
177 MACVLAN_MODE_VEPA |
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +0000178 MACVLAN_MODE_PASSTHRU|
Arnd Bergmann618e1b72009-11-26 06:07:10 +0000179 MACVLAN_MODE_BRIDGE);
180 else if (src->mode == MACVLAN_MODE_VEPA)
181 /* flood to everyone except source */
182 macvlan_broadcast(skb, port, src->dev,
183 MACVLAN_MODE_VEPA |
184 MACVLAN_MODE_BRIDGE);
185 else if (src->mode == MACVLAN_MODE_BRIDGE)
186 /*
187 * flood only to VEPA ports, bridge ports
188 * already saw the frame on the way out.
189 */
190 macvlan_broadcast(skb, port, src->dev,
191 MACVLAN_MODE_VEPA);
Jiri Pirko8a4eb572011-03-12 03:14:39 +0000192 return RX_HANDLER_PASS;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700193 }
194
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +0000195 if (port->passthru)
196 vlan = list_first_entry(&port->vlans, struct macvlan_dev, list);
197 else
198 vlan = macvlan_hash_lookup(port, eth->h_dest);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700199 if (vlan == NULL)
Jiri Pirko8a4eb572011-03-12 03:14:39 +0000200 return RX_HANDLER_PASS;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700201
202 dev = vlan->dev;
203 if (unlikely(!(dev->flags & IFF_UP))) {
204 kfree_skb(skb);
Jiri Pirko8a4eb572011-03-12 03:14:39 +0000205 return RX_HANDLER_CONSUMED;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700206 }
Arnd Bergmanna1e514c2009-11-26 06:07:09 +0000207 len = skb->len + ETH_HLEN;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700208 skb = skb_share_check(skb, GFP_ATOMIC);
Arnd Bergmanna1e514c2009-11-26 06:07:09 +0000209 if (!skb)
Sridhar Samudralaba018772010-07-27 09:10:07 +0000210 goto out;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700211
212 skb->dev = dev;
213 skb->pkt_type = PACKET_HOST;
214
Sridhar Samudralaba018772010-07-27 09:10:07 +0000215 ret = vlan->receive(skb);
216
217out:
218 macvlan_count_rx(vlan, len, ret == NET_RX_SUCCESS, 0);
Jiri Pirko8a4eb572011-03-12 03:14:39 +0000219 return RX_HANDLER_CONSUMED;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700220}
221
Arnd Bergmann618e1b72009-11-26 06:07:10 +0000222static int macvlan_queue_xmit(struct sk_buff *skb, struct net_device *dev)
223{
224 const struct macvlan_dev *vlan = netdev_priv(dev);
225 const struct macvlan_port *port = vlan->port;
226 const struct macvlan_dev *dest;
Daniel Lezcano12a28562011-03-14 06:08:07 +0000227 __u8 ip_summed = skb->ip_summed;
Arnd Bergmann618e1b72009-11-26 06:07:10 +0000228
229 if (vlan->mode == MACVLAN_MODE_BRIDGE) {
230 const struct ethhdr *eth = (void *)skb->data;
Daniel Lezcano12a28562011-03-14 06:08:07 +0000231 skb->ip_summed = CHECKSUM_UNNECESSARY;
Arnd Bergmann618e1b72009-11-26 06:07:10 +0000232
233 /* send to other bridge ports directly */
234 if (is_multicast_ether_addr(eth->h_dest)) {
235 macvlan_broadcast(skb, port, dev, MACVLAN_MODE_BRIDGE);
236 goto xmit_world;
237 }
238
239 dest = macvlan_hash_lookup(port, eth->h_dest);
240 if (dest && dest->mode == MACVLAN_MODE_BRIDGE) {
David Warda37dd332011-05-19 02:53:20 +0000241 /* send to lowerdev first for its network taps */
David Wardcb2d0f32011-09-18 12:53:20 +0000242 dev_forward_skb(vlan->lowerdev, skb);
Arnd Bergmann618e1b72009-11-26 06:07:10 +0000243
244 return NET_XMIT_SUCCESS;
245 }
246 }
247
248xmit_world:
Daniel Lezcano12a28562011-03-14 06:08:07 +0000249 skb->ip_summed = ip_summed;
Arnd Bergmann8a83a002010-01-30 12:23:03 +0000250 skb_set_dev(skb, vlan->lowerdev);
Arnd Bergmann618e1b72009-11-26 06:07:10 +0000251 return dev_queue_xmit(skb);
252}
253
Arnd Bergmannfc0663d2010-01-30 12:23:40 +0000254netdev_tx_t macvlan_start_xmit(struct sk_buff *skb,
255 struct net_device *dev)
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700256{
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700257 unsigned int len = skb->len;
258 int ret;
Eric Dumazet8ffab512010-11-10 21:14:04 +0000259 const struct macvlan_dev *vlan = netdev_priv(dev);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700260
Arnd Bergmann618e1b72009-11-26 06:07:10 +0000261 ret = macvlan_queue_xmit(skb, dev);
Eric Dumazet2d6c9ff2010-05-10 04:51:02 +0000262 if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) {
Eric Dumazet8ffab512010-11-10 21:14:04 +0000263 struct macvlan_pcpu_stats *pcpu_stats;
Eric Dumazet2c114552009-09-03 00:11:45 +0000264
Eric Dumazet8ffab512010-11-10 21:14:04 +0000265 pcpu_stats = this_cpu_ptr(vlan->pcpu_stats);
266 u64_stats_update_begin(&pcpu_stats->syncp);
267 pcpu_stats->tx_packets++;
268 pcpu_stats->tx_bytes += len;
269 u64_stats_update_end(&pcpu_stats->syncp);
270 } else {
271 this_cpu_inc(vlan->pcpu_stats->tx_dropped);
272 }
Patrick McHardycbbef5e2009-11-10 06:14:24 +0000273 return ret;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700274}
Arnd Bergmannfc0663d2010-01-30 12:23:40 +0000275EXPORT_SYMBOL_GPL(macvlan_start_xmit);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700276
277static int macvlan_hard_header(struct sk_buff *skb, struct net_device *dev,
Stephen Hemminger3b04ddd2007-10-09 01:40:57 -0700278 unsigned short type, const void *daddr,
279 const void *saddr, unsigned len)
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700280{
281 const struct macvlan_dev *vlan = netdev_priv(dev);
282 struct net_device *lowerdev = vlan->lowerdev;
283
Stephen Hemminger0c4e8582007-10-09 01:36:32 -0700284 return dev_hard_header(skb, lowerdev, type, daddr,
285 saddr ? : dev->dev_addr, len);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700286}
287
Stephen Hemminger3b04ddd2007-10-09 01:40:57 -0700288static const struct header_ops macvlan_hard_header_ops = {
289 .create = macvlan_hard_header,
290 .rebuild = eth_rebuild_header,
291 .parse = eth_header_parse,
Stephen Hemminger3b04ddd2007-10-09 01:40:57 -0700292 .cache = eth_header_cache,
293 .cache_update = eth_header_cache_update,
294};
295
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700296static int macvlan_open(struct net_device *dev)
297{
298 struct macvlan_dev *vlan = netdev_priv(dev);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700299 struct net_device *lowerdev = vlan->lowerdev;
300 int err;
301
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +0000302 if (vlan->port->passthru) {
303 dev_set_promiscuity(lowerdev, 1);
304 goto hash_add;
305 }
306
Eric Biedermanf9ac30f2009-03-13 13:16:13 -0700307 err = -EBUSY;
308 if (macvlan_addr_busy(vlan->port, dev->dev_addr))
309 goto out;
310
Jiri Pirkoa748ee22010-04-01 21:22:09 +0000311 err = dev_uc_add(lowerdev, dev->dev_addr);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700312 if (err < 0)
Wang Chenb89fb7d2008-07-14 20:57:07 -0700313 goto out;
314 if (dev->flags & IFF_ALLMULTI) {
315 err = dev_set_allmulti(lowerdev, 1);
316 if (err < 0)
317 goto del_unicast;
318 }
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +0000319
320hash_add:
Eric Biedermanf9ac30f2009-03-13 13:16:13 -0700321 macvlan_hash_add(vlan);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700322 return 0;
Wang Chenb89fb7d2008-07-14 20:57:07 -0700323
324del_unicast:
Jiri Pirkoa748ee22010-04-01 21:22:09 +0000325 dev_uc_del(lowerdev, dev->dev_addr);
Wang Chenb89fb7d2008-07-14 20:57:07 -0700326out:
327 return err;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700328}
329
330static int macvlan_stop(struct net_device *dev)
331{
332 struct macvlan_dev *vlan = netdev_priv(dev);
333 struct net_device *lowerdev = vlan->lowerdev;
334
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +0000335 if (vlan->port->passthru) {
336 dev_set_promiscuity(lowerdev, -1);
337 goto hash_del;
338 }
339
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700340 dev_mc_unsync(lowerdev, dev);
341 if (dev->flags & IFF_ALLMULTI)
342 dev_set_allmulti(lowerdev, -1);
343
Jiri Pirkoa748ee22010-04-01 21:22:09 +0000344 dev_uc_del(lowerdev, dev->dev_addr);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700345
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +0000346hash_del:
Eric Dumazet449f4542011-05-19 12:24:16 +0000347 macvlan_hash_del(vlan, !dev->dismantle);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700348 return 0;
349}
350
Patrick McHardyad5d20a2007-11-19 22:00:42 -0800351static int macvlan_set_mac_address(struct net_device *dev, void *p)
352{
353 struct macvlan_dev *vlan = netdev_priv(dev);
354 struct net_device *lowerdev = vlan->lowerdev;
355 struct sockaddr *addr = p;
356 int err;
357
358 if (!is_valid_ether_addr(addr->sa_data))
359 return -EADDRNOTAVAIL;
360
Eric Biedermanf9ac30f2009-03-13 13:16:13 -0700361 if (!(dev->flags & IFF_UP)) {
362 /* Just copy in the new address */
363 memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN);
364 } else {
365 /* Rehash and update the device filters */
366 if (macvlan_addr_busy(vlan->port, addr->sa_data))
367 return -EBUSY;
Patrick McHardyad5d20a2007-11-19 22:00:42 -0800368
Jiri Pirkoa748ee22010-04-01 21:22:09 +0000369 err = dev_uc_add(lowerdev, addr->sa_data);
Jiri Pirkoccffad252009-05-22 23:22:17 +0000370 if (err)
Eric Biedermanf9ac30f2009-03-13 13:16:13 -0700371 return err;
Patrick McHardyad5d20a2007-11-19 22:00:42 -0800372
Jiri Pirkoa748ee22010-04-01 21:22:09 +0000373 dev_uc_del(lowerdev, dev->dev_addr);
Eric Biedermanf9ac30f2009-03-13 13:16:13 -0700374
375 macvlan_hash_change_addr(vlan, addr->sa_data);
376 }
Patrick McHardyad5d20a2007-11-19 22:00:42 -0800377 return 0;
378}
379
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700380static void macvlan_change_rx_flags(struct net_device *dev, int change)
381{
382 struct macvlan_dev *vlan = netdev_priv(dev);
383 struct net_device *lowerdev = vlan->lowerdev;
384
385 if (change & IFF_ALLMULTI)
386 dev_set_allmulti(lowerdev, dev->flags & IFF_ALLMULTI ? 1 : -1);
387}
388
389static void macvlan_set_multicast_list(struct net_device *dev)
390{
391 struct macvlan_dev *vlan = netdev_priv(dev);
392
393 dev_mc_sync(vlan->lowerdev, dev);
394}
395
396static int macvlan_change_mtu(struct net_device *dev, int new_mtu)
397{
398 struct macvlan_dev *vlan = netdev_priv(dev);
399
400 if (new_mtu < 68 || vlan->lowerdev->mtu < new_mtu)
401 return -EINVAL;
402 dev->mtu = new_mtu;
403 return 0;
404}
405
406/*
407 * macvlan network devices have devices nesting below it and are a special
408 * "super class" of normal network devices; split their locks off into a
409 * separate class since they always nest.
410 */
411static struct lock_class_key macvlan_netdev_xmit_lock_key;
David S. Millercf508b12008-07-22 14:16:42 -0700412static struct lock_class_key macvlan_netdev_addr_lock_key;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700413
414#define MACVLAN_FEATURES \
415 (NETIF_F_SG | NETIF_F_ALL_CSUM | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST | \
416 NETIF_F_GSO | NETIF_F_TSO | NETIF_F_UFO | NETIF_F_GSO_ROBUST | \
John Fastabend8d13e672011-06-06 04:27:16 +0000417 NETIF_F_TSO_ECN | NETIF_F_TSO6 | NETIF_F_GRO | NETIF_F_RXCSUM | \
418 NETIF_F_HW_VLAN_FILTER)
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700419
420#define MACVLAN_STATE_MASK \
421 ((1<<__LINK_STATE_NOCARRIER) | (1<<__LINK_STATE_DORMANT))
422
David S. Millere8a04642008-07-17 00:34:19 -0700423static void macvlan_set_lockdep_class_one(struct net_device *dev,
424 struct netdev_queue *txq,
425 void *_unused)
David S. Millerc773e842008-07-08 23:13:53 -0700426{
427 lockdep_set_class(&txq->_xmit_lock,
428 &macvlan_netdev_xmit_lock_key);
429}
430
431static void macvlan_set_lockdep_class(struct net_device *dev)
432{
David S. Millercf508b12008-07-22 14:16:42 -0700433 lockdep_set_class(&dev->addr_list_lock,
434 &macvlan_netdev_addr_lock_key);
David S. Millere8a04642008-07-17 00:34:19 -0700435 netdev_for_each_tx_queue(dev, macvlan_set_lockdep_class_one, NULL);
David S. Millerc773e842008-07-08 23:13:53 -0700436}
437
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700438static int macvlan_init(struct net_device *dev)
439{
440 struct macvlan_dev *vlan = netdev_priv(dev);
441 const struct net_device *lowerdev = vlan->lowerdev;
442
443 dev->state = (dev->state & ~MACVLAN_STATE_MASK) |
444 (lowerdev->state & MACVLAN_STATE_MASK);
445 dev->features = lowerdev->features & MACVLAN_FEATURES;
Eric Dumazet8ffab512010-11-10 21:14:04 +0000446 dev->features |= NETIF_F_LLTX;
Patrick McHardy8c2acc52009-11-23 14:18:53 -0800447 dev->gso_max_size = lowerdev->gso_max_size;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700448 dev->iflink = lowerdev->ifindex;
sg.tweak@gmail.comef5c8992009-06-10 09:55:02 +0000449 dev->hard_header_len = lowerdev->hard_header_len;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700450
David S. Millerc773e842008-07-08 23:13:53 -0700451 macvlan_set_lockdep_class(dev);
452
Eric Dumazet8ffab512010-11-10 21:14:04 +0000453 vlan->pcpu_stats = alloc_percpu(struct macvlan_pcpu_stats);
454 if (!vlan->pcpu_stats)
Eric Dumazetfccaf712009-11-17 08:53:49 +0000455 return -ENOMEM;
456
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700457 return 0;
458}
459
Eric Dumazetfccaf712009-11-17 08:53:49 +0000460static void macvlan_uninit(struct net_device *dev)
461{
462 struct macvlan_dev *vlan = netdev_priv(dev);
Eric W. Biedermand5cd92442011-03-21 18:22:22 -0700463 struct macvlan_port *port = vlan->port;
Eric Dumazetfccaf712009-11-17 08:53:49 +0000464
Eric Dumazet8ffab512010-11-10 21:14:04 +0000465 free_percpu(vlan->pcpu_stats);
Eric W. Biedermand5cd92442011-03-21 18:22:22 -0700466
467 port->count -= 1;
468 if (!port->count)
469 macvlan_port_destroy(port->dev);
Eric Dumazetfccaf712009-11-17 08:53:49 +0000470}
471
Eric Dumazet28172732010-07-07 14:58:56 -0700472static struct rtnl_link_stats64 *macvlan_dev_get_stats64(struct net_device *dev,
473 struct rtnl_link_stats64 *stats)
Eric Dumazetfccaf712009-11-17 08:53:49 +0000474{
Eric Dumazetfccaf712009-11-17 08:53:49 +0000475 struct macvlan_dev *vlan = netdev_priv(dev);
476
Eric Dumazet8ffab512010-11-10 21:14:04 +0000477 if (vlan->pcpu_stats) {
478 struct macvlan_pcpu_stats *p;
479 u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes;
480 u32 rx_errors = 0, tx_dropped = 0;
Eric Dumazetbc661542010-06-24 00:54:21 +0000481 unsigned int start;
Eric Dumazetfccaf712009-11-17 08:53:49 +0000482 int i;
483
484 for_each_possible_cpu(i) {
Eric Dumazet8ffab512010-11-10 21:14:04 +0000485 p = per_cpu_ptr(vlan->pcpu_stats, i);
Eric Dumazetbc661542010-06-24 00:54:21 +0000486 do {
487 start = u64_stats_fetch_begin_bh(&p->syncp);
488 rx_packets = p->rx_packets;
489 rx_bytes = p->rx_bytes;
490 rx_multicast = p->rx_multicast;
Eric Dumazet8ffab512010-11-10 21:14:04 +0000491 tx_packets = p->tx_packets;
492 tx_bytes = p->tx_bytes;
Eric Dumazetbc661542010-06-24 00:54:21 +0000493 } while (u64_stats_fetch_retry_bh(&p->syncp, start));
Eric Dumazet8ffab512010-11-10 21:14:04 +0000494
495 stats->rx_packets += rx_packets;
496 stats->rx_bytes += rx_bytes;
497 stats->multicast += rx_multicast;
498 stats->tx_packets += tx_packets;
499 stats->tx_bytes += tx_bytes;
500 /* rx_errors & tx_dropped are u32, updated
501 * without syncp protection.
502 */
503 rx_errors += p->rx_errors;
504 tx_dropped += p->tx_dropped;
Eric Dumazetfccaf712009-11-17 08:53:49 +0000505 }
Eric Dumazet8ffab512010-11-10 21:14:04 +0000506 stats->rx_errors = rx_errors;
507 stats->rx_dropped = rx_errors;
508 stats->tx_dropped = tx_dropped;
Eric Dumazetfccaf712009-11-17 08:53:49 +0000509 }
510 return stats;
511}
512
John Fastabend8d13e672011-06-06 04:27:16 +0000513static void macvlan_vlan_rx_add_vid(struct net_device *dev,
514 unsigned short vid)
515{
516 struct macvlan_dev *vlan = netdev_priv(dev);
517 struct net_device *lowerdev = vlan->lowerdev;
518 const struct net_device_ops *ops = lowerdev->netdev_ops;
519
520 if (ops->ndo_vlan_rx_add_vid)
521 ops->ndo_vlan_rx_add_vid(lowerdev, vid);
522}
523
524static void macvlan_vlan_rx_kill_vid(struct net_device *dev,
525 unsigned short vid)
526{
527 struct macvlan_dev *vlan = netdev_priv(dev);
528 struct net_device *lowerdev = vlan->lowerdev;
529 const struct net_device_ops *ops = lowerdev->netdev_ops;
530
531 if (ops->ndo_vlan_rx_kill_vid)
532 ops->ndo_vlan_rx_kill_vid(lowerdev, vid);
533}
534
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700535static void macvlan_ethtool_get_drvinfo(struct net_device *dev,
536 struct ethtool_drvinfo *drvinfo)
537{
538 snprintf(drvinfo->driver, 32, "macvlan");
539 snprintf(drvinfo->version, 32, "0.1");
540}
541
Stephen Hemminger9edb8bb2008-10-29 15:31:53 -0700542static int macvlan_ethtool_get_settings(struct net_device *dev,
543 struct ethtool_cmd *cmd)
544{
545 const struct macvlan_dev *vlan = netdev_priv(dev);
Patrick McHardyb1b67dd2009-04-20 04:49:28 +0000546 return dev_ethtool_get_settings(vlan->lowerdev, cmd);
Stephen Hemminger9edb8bb2008-10-29 15:31:53 -0700547}
548
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700549static const struct ethtool_ops macvlan_ethtool_ops = {
550 .get_link = ethtool_op_get_link,
Stephen Hemminger9edb8bb2008-10-29 15:31:53 -0700551 .get_settings = macvlan_ethtool_get_settings,
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700552 .get_drvinfo = macvlan_ethtool_get_drvinfo,
553};
554
Stephen Hemminger54a30c92008-11-19 21:51:06 -0800555static const struct net_device_ops macvlan_netdev_ops = {
556 .ndo_init = macvlan_init,
Eric Dumazetfccaf712009-11-17 08:53:49 +0000557 .ndo_uninit = macvlan_uninit,
Stephen Hemminger54a30c92008-11-19 21:51:06 -0800558 .ndo_open = macvlan_open,
559 .ndo_stop = macvlan_stop,
Stephen Hemminger00829822008-11-20 20:14:53 -0800560 .ndo_start_xmit = macvlan_start_xmit,
Stephen Hemminger54a30c92008-11-19 21:51:06 -0800561 .ndo_change_mtu = macvlan_change_mtu,
562 .ndo_change_rx_flags = macvlan_change_rx_flags,
563 .ndo_set_mac_address = macvlan_set_mac_address,
564 .ndo_set_multicast_list = macvlan_set_multicast_list,
Eric Dumazetbc661542010-06-24 00:54:21 +0000565 .ndo_get_stats64 = macvlan_dev_get_stats64,
Stephen Hemminger54a30c92008-11-19 21:51:06 -0800566 .ndo_validate_addr = eth_validate_addr,
John Fastabend8d13e672011-06-06 04:27:16 +0000567 .ndo_vlan_rx_add_vid = macvlan_vlan_rx_add_vid,
568 .ndo_vlan_rx_kill_vid = macvlan_vlan_rx_kill_vid,
Stephen Hemminger54a30c92008-11-19 21:51:06 -0800569};
570
Herbert Xu8a357472010-07-21 21:44:31 +0000571void macvlan_common_setup(struct net_device *dev)
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700572{
573 ether_setup(dev);
574
Neil Horman550fd082011-07-26 06:05:38 +0000575 dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
Stephen Hemminger54a30c92008-11-19 21:51:06 -0800576 dev->netdev_ops = &macvlan_netdev_ops;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700577 dev->destructor = free_netdev;
Stephen Hemminger3b04ddd2007-10-09 01:40:57 -0700578 dev->header_ops = &macvlan_hard_header_ops,
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700579 dev->ethtool_ops = &macvlan_ethtool_ops;
Herbert Xu8a357472010-07-21 21:44:31 +0000580}
581EXPORT_SYMBOL_GPL(macvlan_common_setup);
582
583static void macvlan_setup(struct net_device *dev)
584{
585 macvlan_common_setup(dev);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700586 dev->tx_queue_len = 0;
587}
588
589static int macvlan_port_create(struct net_device *dev)
590{
591 struct macvlan_port *port;
592 unsigned int i;
Jiri Pirkoab95bfe2010-06-01 21:52:08 +0000593 int err;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700594
595 if (dev->type != ARPHRD_ETHER || dev->flags & IFF_LOOPBACK)
596 return -EINVAL;
597
598 port = kzalloc(sizeof(*port), GFP_KERNEL);
599 if (port == NULL)
600 return -ENOMEM;
601
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +0000602 port->passthru = false;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700603 port->dev = dev;
604 INIT_LIST_HEAD(&port->vlans);
605 for (i = 0; i < MACVLAN_HASH_SIZE; i++)
606 INIT_HLIST_HEAD(&port->vlan_hash[i]);
Jiri Pirkoab95bfe2010-06-01 21:52:08 +0000607
Jiri Pirkoa35e2c12010-06-15 03:27:57 +0000608 err = netdev_rx_handler_register(dev, macvlan_handle_frame, port);
609 if (err)
Jiri Pirkoab95bfe2010-06-01 21:52:08 +0000610 kfree(port);
Eric Dumazetd9351562011-05-20 14:59:23 -0400611 else
612 dev->priv_flags |= IFF_MACVLAN_PORT;
Jiri Pirkoab95bfe2010-06-01 21:52:08 +0000613 return err;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700614}
615
616static void macvlan_port_destroy(struct net_device *dev)
617{
Jiri Pirkoa35e2c12010-06-15 03:27:57 +0000618 struct macvlan_port *port = macvlan_port_get(dev);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700619
Jiri Pirkoa35e2c12010-06-15 03:27:57 +0000620 dev->priv_flags &= ~IFF_MACVLAN_PORT;
Jiri Pirkoab95bfe2010-06-01 21:52:08 +0000621 netdev_rx_handler_unregister(dev);
Lai Jiangshan6e070ae2011-03-18 12:00:07 +0800622 kfree_rcu(port, rcu);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700623}
624
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700625static int macvlan_validate(struct nlattr *tb[], struct nlattr *data[])
626{
627 if (tb[IFLA_ADDRESS]) {
628 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
629 return -EINVAL;
630 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
631 return -EADDRNOTAVAIL;
632 }
Arnd Bergmann27c0b1a2009-11-26 06:07:11 +0000633
634 if (data && data[IFLA_MACVLAN_MODE]) {
635 switch (nla_get_u32(data[IFLA_MACVLAN_MODE])) {
636 case MACVLAN_MODE_PRIVATE:
637 case MACVLAN_MODE_VEPA:
638 case MACVLAN_MODE_BRIDGE:
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +0000639 case MACVLAN_MODE_PASSTHRU:
Arnd Bergmann27c0b1a2009-11-26 06:07:11 +0000640 break;
641 default:
642 return -EINVAL;
643 }
644 }
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700645 return 0;
646}
647
Arnd Bergmannfc0663d2010-01-30 12:23:40 +0000648int macvlan_common_newlink(struct net *src_net, struct net_device *dev,
649 struct nlattr *tb[], struct nlattr *data[],
650 int (*receive)(struct sk_buff *skb),
651 int (*forward)(struct net_device *dev,
652 struct sk_buff *skb))
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700653{
654 struct macvlan_dev *vlan = netdev_priv(dev);
655 struct macvlan_port *port;
656 struct net_device *lowerdev;
657 int err;
658
659 if (!tb[IFLA_LINK])
660 return -EINVAL;
661
Eric W. Biederman81adee42009-11-08 00:53:51 -0800662 lowerdev = __dev_get_by_index(src_net, nla_get_u32(tb[IFLA_LINK]));
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700663 if (lowerdev == NULL)
664 return -ENODEV;
665
Eric Biedermanb0832a22009-03-13 13:15:37 -0700666 /* When creating macvlans on top of other macvlans - use
667 * the real device as the lowerdev.
Patrick McHardya6ca5f12008-01-10 22:39:28 -0800668 */
Eric Biedermanb0832a22009-03-13 13:15:37 -0700669 if (lowerdev->rtnl_link_ops == dev->rtnl_link_ops) {
670 struct macvlan_dev *lowervlan = netdev_priv(lowerdev);
671 lowerdev = lowervlan->lowerdev;
672 }
Patrick McHardya6ca5f12008-01-10 22:39:28 -0800673
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700674 if (!tb[IFLA_MTU])
675 dev->mtu = lowerdev->mtu;
676 else if (dev->mtu > lowerdev->mtu)
677 return -EINVAL;
678
679 if (!tb[IFLA_ADDRESS])
680 random_ether_addr(dev->dev_addr);
681
Jiri Pirkoa35e2c12010-06-15 03:27:57 +0000682 if (!macvlan_port_exists(lowerdev)) {
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700683 err = macvlan_port_create(lowerdev);
684 if (err < 0)
685 return err;
686 }
Jiri Pirkoa35e2c12010-06-15 03:27:57 +0000687 port = macvlan_port_get(lowerdev);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700688
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +0000689 /* Only 1 macvlan device can be created in passthru mode */
690 if (port->passthru)
691 return -EINVAL;
692
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700693 vlan->lowerdev = lowerdev;
694 vlan->dev = dev;
695 vlan->port = port;
Arnd Bergmannfc0663d2010-01-30 12:23:40 +0000696 vlan->receive = receive;
697 vlan->forward = forward;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700698
Arnd Bergmann27c0b1a2009-11-26 06:07:11 +0000699 vlan->mode = MACVLAN_MODE_VEPA;
700 if (data && data[IFLA_MACVLAN_MODE])
701 vlan->mode = nla_get_u32(data[IFLA_MACVLAN_MODE]);
702
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +0000703 if (vlan->mode == MACVLAN_MODE_PASSTHRU) {
Eric W. Biedermand5cd92442011-03-21 18:22:22 -0700704 if (port->count)
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +0000705 return -EINVAL;
706 port->passthru = true;
707 memcpy(dev->dev_addr, lowerdev->dev_addr, ETH_ALEN);
708 }
709
Eric W. Biedermand5cd92442011-03-21 18:22:22 -0700710 port->count += 1;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700711 err = register_netdevice(dev);
712 if (err < 0)
Jiri Pirkof16d3d52010-05-24 07:02:25 +0000713 goto destroy_port;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700714
715 list_add_tail(&vlan->list, &port->vlans);
Patrick Mullaneyfc4a7482009-12-03 15:59:22 -0800716 netif_stacked_transfer_operstate(lowerdev, dev);
Jiri Pirkof16d3d52010-05-24 07:02:25 +0000717
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700718 return 0;
Jiri Pirkof16d3d52010-05-24 07:02:25 +0000719
720destroy_port:
Eric W. Biedermand5cd92442011-03-21 18:22:22 -0700721 port->count -= 1;
722 if (!port->count)
Jiri Pirkof16d3d52010-05-24 07:02:25 +0000723 macvlan_port_destroy(lowerdev);
724
725 return err;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700726}
Arnd Bergmannfc0663d2010-01-30 12:23:40 +0000727EXPORT_SYMBOL_GPL(macvlan_common_newlink);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700728
Arnd Bergmannfc0663d2010-01-30 12:23:40 +0000729static int macvlan_newlink(struct net *src_net, struct net_device *dev,
730 struct nlattr *tb[], struct nlattr *data[])
731{
732 return macvlan_common_newlink(src_net, dev, tb, data,
733 netif_rx,
734 dev_forward_skb);
735}
736
737void macvlan_dellink(struct net_device *dev, struct list_head *head)
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700738{
739 struct macvlan_dev *vlan = netdev_priv(dev);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700740
741 list_del(&vlan->list);
Eric Dumazet23289a32009-10-27 07:06:36 +0000742 unregister_netdevice_queue(dev, head);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700743}
Arnd Bergmannfc0663d2010-01-30 12:23:40 +0000744EXPORT_SYMBOL_GPL(macvlan_dellink);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700745
Arnd Bergmann27c0b1a2009-11-26 06:07:11 +0000746static int macvlan_changelink(struct net_device *dev,
747 struct nlattr *tb[], struct nlattr *data[])
748{
749 struct macvlan_dev *vlan = netdev_priv(dev);
750 if (data && data[IFLA_MACVLAN_MODE])
751 vlan->mode = nla_get_u32(data[IFLA_MACVLAN_MODE]);
752 return 0;
753}
754
755static size_t macvlan_get_size(const struct net_device *dev)
756{
757 return nla_total_size(4);
758}
759
760static int macvlan_fill_info(struct sk_buff *skb,
761 const struct net_device *dev)
762{
763 struct macvlan_dev *vlan = netdev_priv(dev);
764
765 NLA_PUT_U32(skb, IFLA_MACVLAN_MODE, vlan->mode);
766 return 0;
767
768nla_put_failure:
769 return -EMSGSIZE;
770}
771
772static const struct nla_policy macvlan_policy[IFLA_MACVLAN_MAX + 1] = {
773 [IFLA_MACVLAN_MODE] = { .type = NLA_U32 },
774};
775
Arnd Bergmannfc0663d2010-01-30 12:23:40 +0000776int macvlan_link_register(struct rtnl_link_ops *ops)
777{
778 /* common fields */
779 ops->priv_size = sizeof(struct macvlan_dev);
Arnd Bergmannfc0663d2010-01-30 12:23:40 +0000780 ops->validate = macvlan_validate;
781 ops->maxtype = IFLA_MACVLAN_MAX;
782 ops->policy = macvlan_policy;
783 ops->changelink = macvlan_changelink;
784 ops->get_size = macvlan_get_size;
785 ops->fill_info = macvlan_fill_info;
786
787 return rtnl_link_register(ops);
788};
789EXPORT_SYMBOL_GPL(macvlan_link_register);
790
791static struct rtnl_link_ops macvlan_link_ops = {
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700792 .kind = "macvlan",
Herbert Xu8a357472010-07-21 21:44:31 +0000793 .setup = macvlan_setup,
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700794 .newlink = macvlan_newlink,
795 .dellink = macvlan_dellink,
796};
797
798static int macvlan_device_event(struct notifier_block *unused,
799 unsigned long event, void *ptr)
800{
801 struct net_device *dev = ptr;
802 struct macvlan_dev *vlan, *next;
803 struct macvlan_port *port;
Eric Dumazet226bd342011-05-08 23:17:57 +0000804 LIST_HEAD(list_kill);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700805
Jiri Pirkoa35e2c12010-06-15 03:27:57 +0000806 if (!macvlan_port_exists(dev))
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700807 return NOTIFY_DONE;
808
Jiri Pirkoa35e2c12010-06-15 03:27:57 +0000809 port = macvlan_port_get(dev);
810
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700811 switch (event) {
812 case NETDEV_CHANGE:
813 list_for_each_entry(vlan, &port->vlans, list)
Patrick Mullaneyfc4a7482009-12-03 15:59:22 -0800814 netif_stacked_transfer_operstate(vlan->lowerdev,
815 vlan->dev);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700816 break;
817 case NETDEV_FEAT_CHANGE:
818 list_for_each_entry(vlan, &port->vlans, list) {
819 vlan->dev->features = dev->features & MACVLAN_FEATURES;
Patrick McHardy8c2acc52009-11-23 14:18:53 -0800820 vlan->dev->gso_max_size = dev->gso_max_size;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700821 netdev_features_change(vlan->dev);
822 }
823 break;
824 case NETDEV_UNREGISTER:
David Lamparter3b27e102010-09-17 03:22:19 +0000825 /* twiddle thumbs on netns device moves */
826 if (dev->reg_state != NETREG_UNREGISTERING)
827 break;
828
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700829 list_for_each_entry_safe(vlan, next, &port->vlans, list)
Eric Dumazet226bd342011-05-08 23:17:57 +0000830 vlan->dev->rtnl_link_ops->dellink(vlan->dev, &list_kill);
831 unregister_netdevice_many(&list_kill);
832 list_del(&list_kill);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700833 break;
Jiri Pirko1c01fe12010-03-10 10:30:19 +0000834 case NETDEV_PRE_TYPE_CHANGE:
835 /* Forbid underlaying device to change its type. */
836 return NOTIFY_BAD;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700837 }
838 return NOTIFY_DONE;
839}
840
841static struct notifier_block macvlan_notifier_block __read_mostly = {
842 .notifier_call = macvlan_device_event,
843};
844
845static int __init macvlan_init_module(void)
846{
847 int err;
848
849 register_netdevice_notifier(&macvlan_notifier_block);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700850
Arnd Bergmannfc0663d2010-01-30 12:23:40 +0000851 err = macvlan_link_register(&macvlan_link_ops);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700852 if (err < 0)
853 goto err1;
854 return 0;
855err1:
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700856 unregister_netdevice_notifier(&macvlan_notifier_block);
857 return err;
858}
859
860static void __exit macvlan_cleanup_module(void)
861{
862 rtnl_link_unregister(&macvlan_link_ops);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700863 unregister_netdevice_notifier(&macvlan_notifier_block);
864}
865
866module_init(macvlan_init_module);
867module_exit(macvlan_cleanup_module);
868
869MODULE_LICENSE("GPL");
870MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>");
871MODULE_DESCRIPTION("Driver for MAC address based VLANs");
872MODULE_ALIAS_RTNL_LINK("macvlan");