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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>
Jiri Pirko87002b02011-12-08 04:11:17 +000029#include <linux/if_vlan.h>
Patrick McHardyb863ceb2007-07-14 18:55:06 -070030#include <linux/if_link.h>
31#include <linux/if_macvlan.h>
32#include <net/rtnetlink.h>
Arnd Bergmann618e1b72009-11-26 06:07:10 +000033#include <net/xfrm.h>
Patrick McHardyb863ceb2007-07-14 18:55:06 -070034
35#define MACVLAN_HASH_SIZE (1 << BITS_PER_BYTE)
36
37struct macvlan_port {
38 struct net_device *dev;
39 struct hlist_head vlan_hash[MACVLAN_HASH_SIZE];
40 struct list_head vlans;
Jiri Pirko8b37ef02010-06-07 01:36:29 +000041 struct rcu_head rcu;
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +000042 bool passthru;
Eric W. Biedermand5cd92442011-03-21 18:22:22 -070043 int count;
Patrick McHardyb863ceb2007-07-14 18:55:06 -070044};
45
Eric W. Biedermand5cd92442011-03-21 18:22:22 -070046static void macvlan_port_destroy(struct net_device *dev);
47
Jiri Pirkoa35e2c12010-06-15 03:27:57 +000048#define macvlan_port_get_rcu(dev) \
49 ((struct macvlan_port *) rcu_dereference(dev->rx_handler_data))
50#define macvlan_port_get(dev) ((struct macvlan_port *) dev->rx_handler_data)
51#define macvlan_port_exists(dev) (dev->priv_flags & IFF_MACVLAN_PORT)
52
Patrick McHardyb863ceb2007-07-14 18:55:06 -070053static struct macvlan_dev *macvlan_hash_lookup(const struct macvlan_port *port,
54 const unsigned char *addr)
55{
56 struct macvlan_dev *vlan;
57 struct hlist_node *n;
58
59 hlist_for_each_entry_rcu(vlan, n, &port->vlan_hash[addr[5]], hlist) {
Eric Dumazetac067132009-09-01 05:46:05 +000060 if (!compare_ether_addr_64bits(vlan->dev->dev_addr, addr))
Patrick McHardyb863ceb2007-07-14 18:55:06 -070061 return vlan;
62 }
63 return NULL;
64}
65
Eric Biedermanf9ac30f2009-03-13 13:16:13 -070066static void macvlan_hash_add(struct macvlan_dev *vlan)
67{
68 struct macvlan_port *port = vlan->port;
69 const unsigned char *addr = vlan->dev->dev_addr;
70
71 hlist_add_head_rcu(&vlan->hlist, &port->vlan_hash[addr[5]]);
72}
73
Eric Dumazet449f4542011-05-19 12:24:16 +000074static void macvlan_hash_del(struct macvlan_dev *vlan, bool sync)
Eric Biedermanf9ac30f2009-03-13 13:16:13 -070075{
76 hlist_del_rcu(&vlan->hlist);
Eric Dumazet449f4542011-05-19 12:24:16 +000077 if (sync)
78 synchronize_rcu();
Eric Biedermanf9ac30f2009-03-13 13:16:13 -070079}
80
81static void macvlan_hash_change_addr(struct macvlan_dev *vlan,
82 const unsigned char *addr)
83{
Eric Dumazet449f4542011-05-19 12:24:16 +000084 macvlan_hash_del(vlan, true);
Eric Biedermanf9ac30f2009-03-13 13:16:13 -070085 /* Now that we are unhashed it is safe to change the device
86 * address without confusing packet delivery.
87 */
88 memcpy(vlan->dev->dev_addr, addr, ETH_ALEN);
89 macvlan_hash_add(vlan);
90}
91
92static int macvlan_addr_busy(const struct macvlan_port *port,
93 const unsigned char *addr)
94{
95 /* Test to see if the specified multicast address is
96 * currently in use by the underlying device or
97 * another macvlan.
98 */
Eric Dumazetac067132009-09-01 05:46:05 +000099 if (!compare_ether_addr_64bits(port->dev->dev_addr, addr))
Eric Biedermanf9ac30f2009-03-13 13:16:13 -0700100 return 1;
101
102 if (macvlan_hash_lookup(port, addr))
103 return 1;
104
105 return 0;
106}
107
Arnd Bergmanna1e514c2009-11-26 06:07:09 +0000108
Arnd Bergmannfc0663d2010-01-30 12:23:40 +0000109static int macvlan_broadcast_one(struct sk_buff *skb,
110 const struct macvlan_dev *vlan,
Arnd Bergmann618e1b72009-11-26 06:07:10 +0000111 const struct ethhdr *eth, bool local)
Arnd Bergmanna1e514c2009-11-26 06:07:09 +0000112{
Arnd Bergmannfc0663d2010-01-30 12:23:40 +0000113 struct net_device *dev = vlan->dev;
Arnd Bergmanna1e514c2009-11-26 06:07:09 +0000114 if (!skb)
115 return NET_RX_DROP;
116
Arnd Bergmann618e1b72009-11-26 06:07:10 +0000117 if (local)
Arnd Bergmannfc0663d2010-01-30 12:23:40 +0000118 return vlan->forward(dev, skb);
Arnd Bergmann618e1b72009-11-26 06:07:10 +0000119
Arnd Bergmanna1e514c2009-11-26 06:07:09 +0000120 skb->dev = dev;
121 if (!compare_ether_addr_64bits(eth->h_dest,
122 dev->broadcast))
123 skb->pkt_type = PACKET_BROADCAST;
124 else
125 skb->pkt_type = PACKET_MULTICAST;
126
Arnd Bergmannfc0663d2010-01-30 12:23:40 +0000127 return vlan->receive(skb);
Arnd Bergmanna1e514c2009-11-26 06:07:09 +0000128}
129
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700130static void macvlan_broadcast(struct sk_buff *skb,
Arnd Bergmann618e1b72009-11-26 06:07:10 +0000131 const struct macvlan_port *port,
132 struct net_device *src,
133 enum macvlan_mode mode)
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700134{
135 const struct ethhdr *eth = eth_hdr(skb);
136 const struct macvlan_dev *vlan;
137 struct hlist_node *n;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700138 struct sk_buff *nskb;
139 unsigned int i;
Arnd Bergmanna1e514c2009-11-26 06:07:09 +0000140 int err;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700141
Patrick McHardyefbbced2008-11-26 15:30:48 -0800142 if (skb->protocol == htons(ETH_P_PAUSE))
143 return;
144
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700145 for (i = 0; i < MACVLAN_HASH_SIZE; i++) {
146 hlist_for_each_entry_rcu(vlan, n, &port->vlan_hash[i], hlist) {
Arnd Bergmann618e1b72009-11-26 06:07:10 +0000147 if (vlan->dev == src || !(vlan->mode & mode))
148 continue;
149
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700150 nskb = skb_clone(skb, GFP_ATOMIC);
Arnd Bergmannfc0663d2010-01-30 12:23:40 +0000151 err = macvlan_broadcast_one(nskb, vlan, eth,
Arnd Bergmann618e1b72009-11-26 06:07:10 +0000152 mode == MACVLAN_MODE_BRIDGE);
Arnd Bergmanna1e514c2009-11-26 06:07:09 +0000153 macvlan_count_rx(vlan, skb->len + ETH_HLEN,
154 err == NET_RX_SUCCESS, 1);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700155 }
156 }
157}
158
159/* called under rcu_read_lock() from netif_receive_skb */
Jiri Pirko8a4eb572011-03-12 03:14:39 +0000160static rx_handler_result_t macvlan_handle_frame(struct sk_buff **pskb)
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700161{
Jiri Pirkoab95bfe2010-06-01 21:52:08 +0000162 struct macvlan_port *port;
Jiri Pirko8a4eb572011-03-12 03:14:39 +0000163 struct sk_buff *skb = *pskb;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700164 const struct ethhdr *eth = eth_hdr(skb);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700165 const struct macvlan_dev *vlan;
Arnd Bergmann618e1b72009-11-26 06:07:10 +0000166 const struct macvlan_dev *src;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700167 struct net_device *dev;
Sridhar Samudralaba018772010-07-27 09:10:07 +0000168 unsigned int len = 0;
169 int ret = NET_RX_DROP;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700170
Jiri Pirkoa35e2c12010-06-15 03:27:57 +0000171 port = macvlan_port_get_rcu(skb->dev);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700172 if (is_multicast_ether_addr(eth->h_dest)) {
Eric Dumazetbc416d92011-10-06 10:28:31 +0000173 skb = ip_check_defrag(skb, IP_DEFRAG_MACVLAN);
174 if (!skb)
175 return RX_HANDLER_CONSUMED;
Arnd Bergmann618e1b72009-11-26 06:07:10 +0000176 src = macvlan_hash_lookup(port, eth->h_source);
177 if (!src)
178 /* frame comes from an external address */
179 macvlan_broadcast(skb, port, NULL,
180 MACVLAN_MODE_PRIVATE |
181 MACVLAN_MODE_VEPA |
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +0000182 MACVLAN_MODE_PASSTHRU|
Arnd Bergmann618e1b72009-11-26 06:07:10 +0000183 MACVLAN_MODE_BRIDGE);
184 else if (src->mode == MACVLAN_MODE_VEPA)
185 /* flood to everyone except source */
186 macvlan_broadcast(skb, port, src->dev,
187 MACVLAN_MODE_VEPA |
188 MACVLAN_MODE_BRIDGE);
189 else if (src->mode == MACVLAN_MODE_BRIDGE)
190 /*
191 * flood only to VEPA ports, bridge ports
192 * already saw the frame on the way out.
193 */
194 macvlan_broadcast(skb, port, src->dev,
195 MACVLAN_MODE_VEPA);
stephen hemminger729e72a2011-11-02 12:11:53 +0000196 else {
197 /* forward to original port. */
198 vlan = src;
199 ret = macvlan_broadcast_one(skb, vlan, eth, 0);
200 goto out;
201 }
202
Jiri Pirko8a4eb572011-03-12 03:14:39 +0000203 return RX_HANDLER_PASS;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700204 }
205
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +0000206 if (port->passthru)
207 vlan = list_first_entry(&port->vlans, struct macvlan_dev, list);
208 else
209 vlan = macvlan_hash_lookup(port, eth->h_dest);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700210 if (vlan == NULL)
Jiri Pirko8a4eb572011-03-12 03:14:39 +0000211 return RX_HANDLER_PASS;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700212
213 dev = vlan->dev;
214 if (unlikely(!(dev->flags & IFF_UP))) {
215 kfree_skb(skb);
Jiri Pirko8a4eb572011-03-12 03:14:39 +0000216 return RX_HANDLER_CONSUMED;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700217 }
Arnd Bergmanna1e514c2009-11-26 06:07:09 +0000218 len = skb->len + ETH_HLEN;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700219 skb = skb_share_check(skb, GFP_ATOMIC);
Arnd Bergmanna1e514c2009-11-26 06:07:09 +0000220 if (!skb)
Sridhar Samudralaba018772010-07-27 09:10:07 +0000221 goto out;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700222
223 skb->dev = dev;
224 skb->pkt_type = PACKET_HOST;
225
Sridhar Samudralaba018772010-07-27 09:10:07 +0000226 ret = vlan->receive(skb);
227
228out:
229 macvlan_count_rx(vlan, len, ret == NET_RX_SUCCESS, 0);
Jiri Pirko8a4eb572011-03-12 03:14:39 +0000230 return RX_HANDLER_CONSUMED;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700231}
232
Arnd Bergmann618e1b72009-11-26 06:07:10 +0000233static int macvlan_queue_xmit(struct sk_buff *skb, struct net_device *dev)
234{
235 const struct macvlan_dev *vlan = netdev_priv(dev);
236 const struct macvlan_port *port = vlan->port;
237 const struct macvlan_dev *dest;
Daniel Lezcano12a28562011-03-14 06:08:07 +0000238 __u8 ip_summed = skb->ip_summed;
Arnd Bergmann618e1b72009-11-26 06:07:10 +0000239
240 if (vlan->mode == MACVLAN_MODE_BRIDGE) {
241 const struct ethhdr *eth = (void *)skb->data;
Daniel Lezcano12a28562011-03-14 06:08:07 +0000242 skb->ip_summed = CHECKSUM_UNNECESSARY;
Arnd Bergmann618e1b72009-11-26 06:07:10 +0000243
244 /* send to other bridge ports directly */
245 if (is_multicast_ether_addr(eth->h_dest)) {
246 macvlan_broadcast(skb, port, dev, MACVLAN_MODE_BRIDGE);
247 goto xmit_world;
248 }
249
250 dest = macvlan_hash_lookup(port, eth->h_dest);
251 if (dest && dest->mode == MACVLAN_MODE_BRIDGE) {
David Warda37dd332011-05-19 02:53:20 +0000252 /* send to lowerdev first for its network taps */
David Wardcb2d0f32011-09-18 12:53:20 +0000253 dev_forward_skb(vlan->lowerdev, skb);
Arnd Bergmann618e1b72009-11-26 06:07:10 +0000254
255 return NET_XMIT_SUCCESS;
256 }
257 }
258
259xmit_world:
Daniel Lezcano12a28562011-03-14 06:08:07 +0000260 skb->ip_summed = ip_summed;
Arnd Bergmann8a83a002010-01-30 12:23:03 +0000261 skb_set_dev(skb, vlan->lowerdev);
Arnd Bergmann618e1b72009-11-26 06:07:10 +0000262 return dev_queue_xmit(skb);
263}
264
Arnd Bergmannfc0663d2010-01-30 12:23:40 +0000265netdev_tx_t macvlan_start_xmit(struct sk_buff *skb,
266 struct net_device *dev)
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700267{
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700268 unsigned int len = skb->len;
269 int ret;
Eric Dumazet8ffab512010-11-10 21:14:04 +0000270 const struct macvlan_dev *vlan = netdev_priv(dev);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700271
Arnd Bergmann618e1b72009-11-26 06:07:10 +0000272 ret = macvlan_queue_xmit(skb, dev);
Eric Dumazet2d6c9ff2010-05-10 04:51:02 +0000273 if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) {
Eric Dumazet8ffab512010-11-10 21:14:04 +0000274 struct macvlan_pcpu_stats *pcpu_stats;
Eric Dumazet2c114552009-09-03 00:11:45 +0000275
Eric Dumazet8ffab512010-11-10 21:14:04 +0000276 pcpu_stats = this_cpu_ptr(vlan->pcpu_stats);
277 u64_stats_update_begin(&pcpu_stats->syncp);
278 pcpu_stats->tx_packets++;
279 pcpu_stats->tx_bytes += len;
280 u64_stats_update_end(&pcpu_stats->syncp);
281 } else {
282 this_cpu_inc(vlan->pcpu_stats->tx_dropped);
283 }
Patrick McHardycbbef5e2009-11-10 06:14:24 +0000284 return ret;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700285}
Arnd Bergmannfc0663d2010-01-30 12:23:40 +0000286EXPORT_SYMBOL_GPL(macvlan_start_xmit);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700287
288static int macvlan_hard_header(struct sk_buff *skb, struct net_device *dev,
Stephen Hemminger3b04ddd2007-10-09 01:40:57 -0700289 unsigned short type, const void *daddr,
290 const void *saddr, unsigned len)
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700291{
292 const struct macvlan_dev *vlan = netdev_priv(dev);
293 struct net_device *lowerdev = vlan->lowerdev;
294
Stephen Hemminger0c4e8582007-10-09 01:36:32 -0700295 return dev_hard_header(skb, lowerdev, type, daddr,
296 saddr ? : dev->dev_addr, len);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700297}
298
Stephen Hemminger3b04ddd2007-10-09 01:40:57 -0700299static const struct header_ops macvlan_hard_header_ops = {
300 .create = macvlan_hard_header,
301 .rebuild = eth_rebuild_header,
302 .parse = eth_header_parse,
Stephen Hemminger3b04ddd2007-10-09 01:40:57 -0700303 .cache = eth_header_cache,
304 .cache_update = eth_header_cache_update,
305};
306
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700307static int macvlan_open(struct net_device *dev)
308{
309 struct macvlan_dev *vlan = netdev_priv(dev);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700310 struct net_device *lowerdev = vlan->lowerdev;
311 int err;
312
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +0000313 if (vlan->port->passthru) {
314 dev_set_promiscuity(lowerdev, 1);
315 goto hash_add;
316 }
317
Eric Biedermanf9ac30f2009-03-13 13:16:13 -0700318 err = -EBUSY;
319 if (macvlan_addr_busy(vlan->port, dev->dev_addr))
320 goto out;
321
Jiri Pirkoa748ee22010-04-01 21:22:09 +0000322 err = dev_uc_add(lowerdev, dev->dev_addr);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700323 if (err < 0)
Wang Chenb89fb7d2008-07-14 20:57:07 -0700324 goto out;
325 if (dev->flags & IFF_ALLMULTI) {
326 err = dev_set_allmulti(lowerdev, 1);
327 if (err < 0)
328 goto del_unicast;
329 }
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +0000330
331hash_add:
Eric Biedermanf9ac30f2009-03-13 13:16:13 -0700332 macvlan_hash_add(vlan);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700333 return 0;
Wang Chenb89fb7d2008-07-14 20:57:07 -0700334
335del_unicast:
Jiri Pirkoa748ee22010-04-01 21:22:09 +0000336 dev_uc_del(lowerdev, dev->dev_addr);
Wang Chenb89fb7d2008-07-14 20:57:07 -0700337out:
338 return err;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700339}
340
341static int macvlan_stop(struct net_device *dev)
342{
343 struct macvlan_dev *vlan = netdev_priv(dev);
344 struct net_device *lowerdev = vlan->lowerdev;
345
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +0000346 if (vlan->port->passthru) {
347 dev_set_promiscuity(lowerdev, -1);
348 goto hash_del;
349 }
350
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700351 dev_mc_unsync(lowerdev, dev);
352 if (dev->flags & IFF_ALLMULTI)
353 dev_set_allmulti(lowerdev, -1);
354
Jiri Pirkoa748ee22010-04-01 21:22:09 +0000355 dev_uc_del(lowerdev, dev->dev_addr);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700356
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +0000357hash_del:
Eric Dumazet449f4542011-05-19 12:24:16 +0000358 macvlan_hash_del(vlan, !dev->dismantle);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700359 return 0;
360}
361
Patrick McHardyad5d20a2007-11-19 22:00:42 -0800362static int macvlan_set_mac_address(struct net_device *dev, void *p)
363{
364 struct macvlan_dev *vlan = netdev_priv(dev);
365 struct net_device *lowerdev = vlan->lowerdev;
366 struct sockaddr *addr = p;
367 int err;
368
369 if (!is_valid_ether_addr(addr->sa_data))
370 return -EADDRNOTAVAIL;
371
Eric Biedermanf9ac30f2009-03-13 13:16:13 -0700372 if (!(dev->flags & IFF_UP)) {
373 /* Just copy in the new address */
374 memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN);
375 } else {
376 /* Rehash and update the device filters */
377 if (macvlan_addr_busy(vlan->port, addr->sa_data))
378 return -EBUSY;
Patrick McHardyad5d20a2007-11-19 22:00:42 -0800379
Jiri Pirkoa748ee22010-04-01 21:22:09 +0000380 err = dev_uc_add(lowerdev, addr->sa_data);
Jiri Pirkoccffad22009-05-22 23:22:17 +0000381 if (err)
Eric Biedermanf9ac30f2009-03-13 13:16:13 -0700382 return err;
Patrick McHardyad5d20a2007-11-19 22:00:42 -0800383
Jiri Pirkoa748ee22010-04-01 21:22:09 +0000384 dev_uc_del(lowerdev, dev->dev_addr);
Eric Biedermanf9ac30f2009-03-13 13:16:13 -0700385
386 macvlan_hash_change_addr(vlan, addr->sa_data);
387 }
Patrick McHardyad5d20a2007-11-19 22:00:42 -0800388 return 0;
389}
390
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700391static void macvlan_change_rx_flags(struct net_device *dev, int change)
392{
393 struct macvlan_dev *vlan = netdev_priv(dev);
394 struct net_device *lowerdev = vlan->lowerdev;
395
396 if (change & IFF_ALLMULTI)
397 dev_set_allmulti(lowerdev, dev->flags & IFF_ALLMULTI ? 1 : -1);
398}
399
400static void macvlan_set_multicast_list(struct net_device *dev)
401{
402 struct macvlan_dev *vlan = netdev_priv(dev);
403
404 dev_mc_sync(vlan->lowerdev, dev);
405}
406
407static int macvlan_change_mtu(struct net_device *dev, int new_mtu)
408{
409 struct macvlan_dev *vlan = netdev_priv(dev);
410
411 if (new_mtu < 68 || vlan->lowerdev->mtu < new_mtu)
412 return -EINVAL;
413 dev->mtu = new_mtu;
414 return 0;
415}
416
417/*
418 * macvlan network devices have devices nesting below it and are a special
419 * "super class" of normal network devices; split their locks off into a
420 * separate class since they always nest.
421 */
422static struct lock_class_key macvlan_netdev_xmit_lock_key;
David S. Millercf508b12008-07-22 14:16:42 -0700423static struct lock_class_key macvlan_netdev_addr_lock_key;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700424
425#define MACVLAN_FEATURES \
426 (NETIF_F_SG | NETIF_F_ALL_CSUM | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST | \
427 NETIF_F_GSO | NETIF_F_TSO | NETIF_F_UFO | NETIF_F_GSO_ROBUST | \
John Fastabend8d13e672011-06-06 04:27:16 +0000428 NETIF_F_TSO_ECN | NETIF_F_TSO6 | NETIF_F_GRO | NETIF_F_RXCSUM | \
429 NETIF_F_HW_VLAN_FILTER)
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700430
431#define MACVLAN_STATE_MASK \
432 ((1<<__LINK_STATE_NOCARRIER) | (1<<__LINK_STATE_DORMANT))
433
David S. Millere8a04642008-07-17 00:34:19 -0700434static void macvlan_set_lockdep_class_one(struct net_device *dev,
435 struct netdev_queue *txq,
436 void *_unused)
David S. Millerc773e842008-07-08 23:13:53 -0700437{
438 lockdep_set_class(&txq->_xmit_lock,
439 &macvlan_netdev_xmit_lock_key);
440}
441
442static void macvlan_set_lockdep_class(struct net_device *dev)
443{
David S. Millercf508b12008-07-22 14:16:42 -0700444 lockdep_set_class(&dev->addr_list_lock,
445 &macvlan_netdev_addr_lock_key);
David S. Millere8a04642008-07-17 00:34:19 -0700446 netdev_for_each_tx_queue(dev, macvlan_set_lockdep_class_one, NULL);
David S. Millerc773e842008-07-08 23:13:53 -0700447}
448
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700449static int macvlan_init(struct net_device *dev)
450{
451 struct macvlan_dev *vlan = netdev_priv(dev);
452 const struct net_device *lowerdev = vlan->lowerdev;
453
454 dev->state = (dev->state & ~MACVLAN_STATE_MASK) |
455 (lowerdev->state & MACVLAN_STATE_MASK);
456 dev->features = lowerdev->features & MACVLAN_FEATURES;
Eric Dumazet8ffab512010-11-10 21:14:04 +0000457 dev->features |= NETIF_F_LLTX;
Patrick McHardy8c2acc52009-11-23 14:18:53 -0800458 dev->gso_max_size = lowerdev->gso_max_size;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700459 dev->iflink = lowerdev->ifindex;
sg.tweak@gmail.comef5c8992009-06-10 09:55:02 +0000460 dev->hard_header_len = lowerdev->hard_header_len;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700461
David S. Millerc773e842008-07-08 23:13:53 -0700462 macvlan_set_lockdep_class(dev);
463
Eric Dumazet8ffab512010-11-10 21:14:04 +0000464 vlan->pcpu_stats = alloc_percpu(struct macvlan_pcpu_stats);
465 if (!vlan->pcpu_stats)
Eric Dumazetfccaf712009-11-17 08:53:49 +0000466 return -ENOMEM;
467
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700468 return 0;
469}
470
Eric Dumazetfccaf712009-11-17 08:53:49 +0000471static void macvlan_uninit(struct net_device *dev)
472{
473 struct macvlan_dev *vlan = netdev_priv(dev);
Eric W. Biedermand5cd92442011-03-21 18:22:22 -0700474 struct macvlan_port *port = vlan->port;
Eric Dumazetfccaf712009-11-17 08:53:49 +0000475
Eric Dumazet8ffab512010-11-10 21:14:04 +0000476 free_percpu(vlan->pcpu_stats);
Eric W. Biedermand5cd92442011-03-21 18:22:22 -0700477
478 port->count -= 1;
479 if (!port->count)
480 macvlan_port_destroy(port->dev);
Eric Dumazetfccaf712009-11-17 08:53:49 +0000481}
482
Eric Dumazet28172732010-07-07 14:58:56 -0700483static struct rtnl_link_stats64 *macvlan_dev_get_stats64(struct net_device *dev,
484 struct rtnl_link_stats64 *stats)
Eric Dumazetfccaf712009-11-17 08:53:49 +0000485{
Eric Dumazetfccaf712009-11-17 08:53:49 +0000486 struct macvlan_dev *vlan = netdev_priv(dev);
487
Eric Dumazet8ffab512010-11-10 21:14:04 +0000488 if (vlan->pcpu_stats) {
489 struct macvlan_pcpu_stats *p;
490 u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes;
491 u32 rx_errors = 0, tx_dropped = 0;
Eric Dumazetbc661542010-06-24 00:54:21 +0000492 unsigned int start;
Eric Dumazetfccaf712009-11-17 08:53:49 +0000493 int i;
494
495 for_each_possible_cpu(i) {
Eric Dumazet8ffab512010-11-10 21:14:04 +0000496 p = per_cpu_ptr(vlan->pcpu_stats, i);
Eric Dumazetbc661542010-06-24 00:54:21 +0000497 do {
498 start = u64_stats_fetch_begin_bh(&p->syncp);
499 rx_packets = p->rx_packets;
500 rx_bytes = p->rx_bytes;
501 rx_multicast = p->rx_multicast;
Eric Dumazet8ffab512010-11-10 21:14:04 +0000502 tx_packets = p->tx_packets;
503 tx_bytes = p->tx_bytes;
Eric Dumazetbc661542010-06-24 00:54:21 +0000504 } while (u64_stats_fetch_retry_bh(&p->syncp, start));
Eric Dumazet8ffab512010-11-10 21:14:04 +0000505
506 stats->rx_packets += rx_packets;
507 stats->rx_bytes += rx_bytes;
508 stats->multicast += rx_multicast;
509 stats->tx_packets += tx_packets;
510 stats->tx_bytes += tx_bytes;
511 /* rx_errors & tx_dropped are u32, updated
512 * without syncp protection.
513 */
514 rx_errors += p->rx_errors;
515 tx_dropped += p->tx_dropped;
Eric Dumazetfccaf712009-11-17 08:53:49 +0000516 }
Eric Dumazet8ffab512010-11-10 21:14:04 +0000517 stats->rx_errors = rx_errors;
518 stats->rx_dropped = rx_errors;
519 stats->tx_dropped = tx_dropped;
Eric Dumazetfccaf712009-11-17 08:53:49 +0000520 }
521 return stats;
522}
523
Jiri Pirko8e586132011-12-08 19:52:37 -0500524static int macvlan_vlan_rx_add_vid(struct net_device *dev,
John Fastabend8d13e672011-06-06 04:27:16 +0000525 unsigned short vid)
526{
527 struct macvlan_dev *vlan = netdev_priv(dev);
528 struct net_device *lowerdev = vlan->lowerdev;
John Fastabend8d13e672011-06-06 04:27:16 +0000529
Jiri Pirko87002b02011-12-08 04:11:17 +0000530 return vlan_vid_add(lowerdev, vid);
John Fastabend8d13e672011-06-06 04:27:16 +0000531}
532
Jiri Pirko8e586132011-12-08 19:52:37 -0500533static int macvlan_vlan_rx_kill_vid(struct net_device *dev,
John Fastabend8d13e672011-06-06 04:27:16 +0000534 unsigned short vid)
535{
536 struct macvlan_dev *vlan = netdev_priv(dev);
537 struct net_device *lowerdev = vlan->lowerdev;
John Fastabend8d13e672011-06-06 04:27:16 +0000538
Jiri Pirko87002b02011-12-08 04:11:17 +0000539 vlan_vid_del(lowerdev, vid);
Jiri Pirko8e586132011-12-08 19:52:37 -0500540 return 0;
John Fastabend8d13e672011-06-06 04:27:16 +0000541}
542
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700543static void macvlan_ethtool_get_drvinfo(struct net_device *dev,
544 struct ethtool_drvinfo *drvinfo)
545{
546 snprintf(drvinfo->driver, 32, "macvlan");
547 snprintf(drvinfo->version, 32, "0.1");
548}
549
Stephen Hemminger9edb8bb2008-10-29 15:31:53 -0700550static int macvlan_ethtool_get_settings(struct net_device *dev,
551 struct ethtool_cmd *cmd)
552{
553 const struct macvlan_dev *vlan = netdev_priv(dev);
Jiri Pirko4bc71cb2011-09-03 03:34:30 +0000554
555 return __ethtool_get_settings(vlan->lowerdev, cmd);
Stephen Hemminger9edb8bb2008-10-29 15:31:53 -0700556}
557
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700558static const struct ethtool_ops macvlan_ethtool_ops = {
559 .get_link = ethtool_op_get_link,
Stephen Hemminger9edb8bb2008-10-29 15:31:53 -0700560 .get_settings = macvlan_ethtool_get_settings,
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700561 .get_drvinfo = macvlan_ethtool_get_drvinfo,
562};
563
Stephen Hemminger54a30c92008-11-19 21:51:06 -0800564static const struct net_device_ops macvlan_netdev_ops = {
565 .ndo_init = macvlan_init,
Eric Dumazetfccaf712009-11-17 08:53:49 +0000566 .ndo_uninit = macvlan_uninit,
Stephen Hemminger54a30c92008-11-19 21:51:06 -0800567 .ndo_open = macvlan_open,
568 .ndo_stop = macvlan_stop,
Stephen Hemminger00829822008-11-20 20:14:53 -0800569 .ndo_start_xmit = macvlan_start_xmit,
Stephen Hemminger54a30c92008-11-19 21:51:06 -0800570 .ndo_change_mtu = macvlan_change_mtu,
571 .ndo_change_rx_flags = macvlan_change_rx_flags,
572 .ndo_set_mac_address = macvlan_set_mac_address,
Jiri Pirkoafc4b132011-08-16 06:29:01 +0000573 .ndo_set_rx_mode = macvlan_set_multicast_list,
Eric Dumazetbc661542010-06-24 00:54:21 +0000574 .ndo_get_stats64 = macvlan_dev_get_stats64,
Stephen Hemminger54a30c92008-11-19 21:51:06 -0800575 .ndo_validate_addr = eth_validate_addr,
John Fastabend8d13e672011-06-06 04:27:16 +0000576 .ndo_vlan_rx_add_vid = macvlan_vlan_rx_add_vid,
577 .ndo_vlan_rx_kill_vid = macvlan_vlan_rx_kill_vid,
Stephen Hemminger54a30c92008-11-19 21:51:06 -0800578};
579
Herbert Xu8a357472010-07-21 21:44:31 +0000580void macvlan_common_setup(struct net_device *dev)
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700581{
582 ether_setup(dev);
583
Neil Horman550fd082011-07-26 06:05:38 +0000584 dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
Stephen Hemminger54a30c92008-11-19 21:51:06 -0800585 dev->netdev_ops = &macvlan_netdev_ops;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700586 dev->destructor = free_netdev;
Stephen Hemminger3b04ddd2007-10-09 01:40:57 -0700587 dev->header_ops = &macvlan_hard_header_ops,
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700588 dev->ethtool_ops = &macvlan_ethtool_ops;
Herbert Xu8a357472010-07-21 21:44:31 +0000589}
590EXPORT_SYMBOL_GPL(macvlan_common_setup);
591
592static void macvlan_setup(struct net_device *dev)
593{
594 macvlan_common_setup(dev);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700595 dev->tx_queue_len = 0;
596}
597
598static int macvlan_port_create(struct net_device *dev)
599{
600 struct macvlan_port *port;
601 unsigned int i;
Jiri Pirkoab95bfe2010-06-01 21:52:08 +0000602 int err;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700603
604 if (dev->type != ARPHRD_ETHER || dev->flags & IFF_LOOPBACK)
605 return -EINVAL;
606
607 port = kzalloc(sizeof(*port), GFP_KERNEL);
608 if (port == NULL)
609 return -ENOMEM;
610
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +0000611 port->passthru = false;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700612 port->dev = dev;
613 INIT_LIST_HEAD(&port->vlans);
614 for (i = 0; i < MACVLAN_HASH_SIZE; i++)
615 INIT_HLIST_HEAD(&port->vlan_hash[i]);
Jiri Pirkoab95bfe2010-06-01 21:52:08 +0000616
Jiri Pirkoa35e2c12010-06-15 03:27:57 +0000617 err = netdev_rx_handler_register(dev, macvlan_handle_frame, port);
618 if (err)
Jiri Pirkoab95bfe2010-06-01 21:52:08 +0000619 kfree(port);
Eric Dumazetd9351562011-05-20 14:59:23 -0400620 else
621 dev->priv_flags |= IFF_MACVLAN_PORT;
Jiri Pirkoab95bfe2010-06-01 21:52:08 +0000622 return err;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700623}
624
625static void macvlan_port_destroy(struct net_device *dev)
626{
Jiri Pirkoa35e2c12010-06-15 03:27:57 +0000627 struct macvlan_port *port = macvlan_port_get(dev);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700628
Jiri Pirkoa35e2c12010-06-15 03:27:57 +0000629 dev->priv_flags &= ~IFF_MACVLAN_PORT;
Jiri Pirkoab95bfe2010-06-01 21:52:08 +0000630 netdev_rx_handler_unregister(dev);
Lai Jiangshan6e070ae2011-03-18 12:00:07 +0800631 kfree_rcu(port, rcu);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700632}
633
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700634static int macvlan_validate(struct nlattr *tb[], struct nlattr *data[])
635{
636 if (tb[IFLA_ADDRESS]) {
637 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
638 return -EINVAL;
639 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
640 return -EADDRNOTAVAIL;
641 }
Arnd Bergmann27c0b1a2009-11-26 06:07:11 +0000642
643 if (data && data[IFLA_MACVLAN_MODE]) {
644 switch (nla_get_u32(data[IFLA_MACVLAN_MODE])) {
645 case MACVLAN_MODE_PRIVATE:
646 case MACVLAN_MODE_VEPA:
647 case MACVLAN_MODE_BRIDGE:
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +0000648 case MACVLAN_MODE_PASSTHRU:
Arnd Bergmann27c0b1a2009-11-26 06:07:11 +0000649 break;
650 default:
651 return -EINVAL;
652 }
653 }
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700654 return 0;
655}
656
Arnd Bergmannfc0663d2010-01-30 12:23:40 +0000657int macvlan_common_newlink(struct net *src_net, struct net_device *dev,
658 struct nlattr *tb[], struct nlattr *data[],
659 int (*receive)(struct sk_buff *skb),
660 int (*forward)(struct net_device *dev,
661 struct sk_buff *skb))
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700662{
663 struct macvlan_dev *vlan = netdev_priv(dev);
664 struct macvlan_port *port;
665 struct net_device *lowerdev;
666 int err;
667
668 if (!tb[IFLA_LINK])
669 return -EINVAL;
670
Eric W. Biederman81adee42009-11-08 00:53:51 -0800671 lowerdev = __dev_get_by_index(src_net, nla_get_u32(tb[IFLA_LINK]));
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700672 if (lowerdev == NULL)
673 return -ENODEV;
674
Eric Biedermanb0832a22009-03-13 13:15:37 -0700675 /* When creating macvlans on top of other macvlans - use
676 * the real device as the lowerdev.
Patrick McHardya6ca5f12008-01-10 22:39:28 -0800677 */
Eric Biedermanb0832a22009-03-13 13:15:37 -0700678 if (lowerdev->rtnl_link_ops == dev->rtnl_link_ops) {
679 struct macvlan_dev *lowervlan = netdev_priv(lowerdev);
680 lowerdev = lowervlan->lowerdev;
681 }
Patrick McHardya6ca5f12008-01-10 22:39:28 -0800682
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700683 if (!tb[IFLA_MTU])
684 dev->mtu = lowerdev->mtu;
685 else if (dev->mtu > lowerdev->mtu)
686 return -EINVAL;
687
688 if (!tb[IFLA_ADDRESS])
689 random_ether_addr(dev->dev_addr);
690
Jiri Pirkoa35e2c12010-06-15 03:27:57 +0000691 if (!macvlan_port_exists(lowerdev)) {
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700692 err = macvlan_port_create(lowerdev);
693 if (err < 0)
694 return err;
695 }
Jiri Pirkoa35e2c12010-06-15 03:27:57 +0000696 port = macvlan_port_get(lowerdev);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700697
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +0000698 /* Only 1 macvlan device can be created in passthru mode */
699 if (port->passthru)
700 return -EINVAL;
701
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700702 vlan->lowerdev = lowerdev;
703 vlan->dev = dev;
704 vlan->port = port;
Arnd Bergmannfc0663d2010-01-30 12:23:40 +0000705 vlan->receive = receive;
706 vlan->forward = forward;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700707
Arnd Bergmann27c0b1a2009-11-26 06:07:11 +0000708 vlan->mode = MACVLAN_MODE_VEPA;
709 if (data && data[IFLA_MACVLAN_MODE])
710 vlan->mode = nla_get_u32(data[IFLA_MACVLAN_MODE]);
711
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +0000712 if (vlan->mode == MACVLAN_MODE_PASSTHRU) {
Eric W. Biedermand5cd92442011-03-21 18:22:22 -0700713 if (port->count)
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +0000714 return -EINVAL;
715 port->passthru = true;
716 memcpy(dev->dev_addr, lowerdev->dev_addr, ETH_ALEN);
717 }
718
Eric W. Biedermand5cd92442011-03-21 18:22:22 -0700719 port->count += 1;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700720 err = register_netdevice(dev);
721 if (err < 0)
Jiri Pirkof16d3d52010-05-24 07:02:25 +0000722 goto destroy_port;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700723
724 list_add_tail(&vlan->list, &port->vlans);
Patrick Mullaneyfc4a7482009-12-03 15:59:22 -0800725 netif_stacked_transfer_operstate(lowerdev, dev);
Jiri Pirkof16d3d52010-05-24 07:02:25 +0000726
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700727 return 0;
Jiri Pirkof16d3d52010-05-24 07:02:25 +0000728
729destroy_port:
Eric W. Biedermand5cd92442011-03-21 18:22:22 -0700730 port->count -= 1;
731 if (!port->count)
Jiri Pirkof16d3d52010-05-24 07:02:25 +0000732 macvlan_port_destroy(lowerdev);
733
734 return err;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700735}
Arnd Bergmannfc0663d2010-01-30 12:23:40 +0000736EXPORT_SYMBOL_GPL(macvlan_common_newlink);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700737
Arnd Bergmannfc0663d2010-01-30 12:23:40 +0000738static int macvlan_newlink(struct net *src_net, struct net_device *dev,
739 struct nlattr *tb[], struct nlattr *data[])
740{
741 return macvlan_common_newlink(src_net, dev, tb, data,
742 netif_rx,
743 dev_forward_skb);
744}
745
746void macvlan_dellink(struct net_device *dev, struct list_head *head)
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700747{
748 struct macvlan_dev *vlan = netdev_priv(dev);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700749
750 list_del(&vlan->list);
Eric Dumazet23289a32009-10-27 07:06:36 +0000751 unregister_netdevice_queue(dev, head);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700752}
Arnd Bergmannfc0663d2010-01-30 12:23:40 +0000753EXPORT_SYMBOL_GPL(macvlan_dellink);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700754
Arnd Bergmann27c0b1a2009-11-26 06:07:11 +0000755static int macvlan_changelink(struct net_device *dev,
756 struct nlattr *tb[], struct nlattr *data[])
757{
758 struct macvlan_dev *vlan = netdev_priv(dev);
759 if (data && data[IFLA_MACVLAN_MODE])
760 vlan->mode = nla_get_u32(data[IFLA_MACVLAN_MODE]);
761 return 0;
762}
763
764static size_t macvlan_get_size(const struct net_device *dev)
765{
766 return nla_total_size(4);
767}
768
769static int macvlan_fill_info(struct sk_buff *skb,
770 const struct net_device *dev)
771{
772 struct macvlan_dev *vlan = netdev_priv(dev);
773
774 NLA_PUT_U32(skb, IFLA_MACVLAN_MODE, vlan->mode);
775 return 0;
776
777nla_put_failure:
778 return -EMSGSIZE;
779}
780
781static const struct nla_policy macvlan_policy[IFLA_MACVLAN_MAX + 1] = {
782 [IFLA_MACVLAN_MODE] = { .type = NLA_U32 },
783};
784
Arnd Bergmannfc0663d2010-01-30 12:23:40 +0000785int macvlan_link_register(struct rtnl_link_ops *ops)
786{
787 /* common fields */
788 ops->priv_size = sizeof(struct macvlan_dev);
Arnd Bergmannfc0663d2010-01-30 12:23:40 +0000789 ops->validate = macvlan_validate;
790 ops->maxtype = IFLA_MACVLAN_MAX;
791 ops->policy = macvlan_policy;
792 ops->changelink = macvlan_changelink;
793 ops->get_size = macvlan_get_size;
794 ops->fill_info = macvlan_fill_info;
795
796 return rtnl_link_register(ops);
797};
798EXPORT_SYMBOL_GPL(macvlan_link_register);
799
800static struct rtnl_link_ops macvlan_link_ops = {
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700801 .kind = "macvlan",
Herbert Xu8a357472010-07-21 21:44:31 +0000802 .setup = macvlan_setup,
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700803 .newlink = macvlan_newlink,
804 .dellink = macvlan_dellink,
805};
806
807static int macvlan_device_event(struct notifier_block *unused,
808 unsigned long event, void *ptr)
809{
810 struct net_device *dev = ptr;
811 struct macvlan_dev *vlan, *next;
812 struct macvlan_port *port;
Eric Dumazet226bd342011-05-08 23:17:57 +0000813 LIST_HEAD(list_kill);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700814
Jiri Pirkoa35e2c12010-06-15 03:27:57 +0000815 if (!macvlan_port_exists(dev))
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700816 return NOTIFY_DONE;
817
Jiri Pirkoa35e2c12010-06-15 03:27:57 +0000818 port = macvlan_port_get(dev);
819
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700820 switch (event) {
821 case NETDEV_CHANGE:
822 list_for_each_entry(vlan, &port->vlans, list)
Patrick Mullaneyfc4a7482009-12-03 15:59:22 -0800823 netif_stacked_transfer_operstate(vlan->lowerdev,
824 vlan->dev);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700825 break;
826 case NETDEV_FEAT_CHANGE:
827 list_for_each_entry(vlan, &port->vlans, list) {
828 vlan->dev->features = dev->features & MACVLAN_FEATURES;
Patrick McHardy8c2acc52009-11-23 14:18:53 -0800829 vlan->dev->gso_max_size = dev->gso_max_size;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700830 netdev_features_change(vlan->dev);
831 }
832 break;
833 case NETDEV_UNREGISTER:
David Lamparter3b27e102010-09-17 03:22:19 +0000834 /* twiddle thumbs on netns device moves */
835 if (dev->reg_state != NETREG_UNREGISTERING)
836 break;
837
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700838 list_for_each_entry_safe(vlan, next, &port->vlans, list)
Eric Dumazet226bd342011-05-08 23:17:57 +0000839 vlan->dev->rtnl_link_ops->dellink(vlan->dev, &list_kill);
840 unregister_netdevice_many(&list_kill);
841 list_del(&list_kill);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700842 break;
Jiri Pirko1c01fe12010-03-10 10:30:19 +0000843 case NETDEV_PRE_TYPE_CHANGE:
844 /* Forbid underlaying device to change its type. */
845 return NOTIFY_BAD;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700846 }
847 return NOTIFY_DONE;
848}
849
850static struct notifier_block macvlan_notifier_block __read_mostly = {
851 .notifier_call = macvlan_device_event,
852};
853
854static int __init macvlan_init_module(void)
855{
856 int err;
857
858 register_netdevice_notifier(&macvlan_notifier_block);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700859
Arnd Bergmannfc0663d2010-01-30 12:23:40 +0000860 err = macvlan_link_register(&macvlan_link_ops);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700861 if (err < 0)
862 goto err1;
863 return 0;
864err1:
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700865 unregister_netdevice_notifier(&macvlan_notifier_block);
866 return err;
867}
868
869static void __exit macvlan_cleanup_module(void)
870{
871 rtnl_link_unregister(&macvlan_link_ops);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700872 unregister_netdevice_notifier(&macvlan_notifier_block);
873}
874
875module_init(macvlan_init_module);
876module_exit(macvlan_cleanup_module);
877
878MODULE_LICENSE("GPL");
879MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>");
880MODULE_DESCRIPTION("Driver for MAC address based VLANs");
881MODULE_ALIAS_RTNL_LINK("macvlan");