blob: cd9b53834bf60a4345880b8c6b4b02967372dba6 [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>
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>
Eric Dumazetcd431e72013-02-05 20:22:50 +000032#include <linux/hash.h>
Herbert Xu412ca152014-04-17 13:45:59 +080033#include <linux/workqueue.h>
Patrick McHardyb863ceb2007-07-14 18:55:06 -070034#include <net/rtnetlink.h>
Arnd Bergmann618e1b72009-11-26 06:07:10 +000035#include <net/xfrm.h>
dingtianhong688cea82014-05-30 16:00:56 +080036#include <linux/netpoll.h>
Patrick McHardyb863ceb2007-07-14 18:55:06 -070037
Michael Braun79cf79a2014-09-25 16:31:08 +020038#define MACVLAN_HASH_BITS 8
39#define MACVLAN_HASH_SIZE (1<<MACVLAN_HASH_BITS)
Nicolas Dichtel07d92d52014-09-17 10:08:08 +020040#define MACVLAN_BC_QUEUE_LEN 1000
Patrick McHardyb863ceb2007-07-14 18:55:06 -070041
42struct macvlan_port {
43 struct net_device *dev;
44 struct hlist_head vlan_hash[MACVLAN_HASH_SIZE];
45 struct list_head vlans;
Jiri Pirko8b37ef02010-06-07 01:36:29 +000046 struct rcu_head rcu;
Herbert Xu412ca152014-04-17 13:45:59 +080047 struct sk_buff_head bc_queue;
48 struct work_struct bc_work;
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +000049 bool passthru;
David S. Miller5e3c5162014-08-14 14:32:49 -070050 int count;
Michael Braun79cf79a2014-09-25 16:31:08 +020051 struct hlist_head vlan_source_hash[MACVLAN_HASH_SIZE];
Herbert Xu9c127a02016-06-01 11:45:44 +080052 DECLARE_BITMAP(mc_filter, MACVLAN_MC_FILTER_SZ);
Michael Braun79cf79a2014-09-25 16:31:08 +020053};
54
55struct macvlan_source_entry {
56 struct hlist_node hlist;
57 struct macvlan_dev *vlan;
58 unsigned char addr[6+2] __aligned(sizeof(u16));
59 struct rcu_head rcu;
Patrick McHardyb863ceb2007-07-14 18:55:06 -070060};
61
Herbert Xu412ca152014-04-17 13:45:59 +080062struct macvlan_skb_cb {
63 const struct macvlan_dev *src;
64};
65
66#define MACVLAN_SKB_CB(__skb) ((struct macvlan_skb_cb *)&((__skb)->cb[0]))
67
Eric W. Biedermand5cd92442011-03-21 18:22:22 -070068static void macvlan_port_destroy(struct net_device *dev);
69
Michael Braun79cf79a2014-09-25 16:31:08 +020070/* Hash Ethernet address */
71static u32 macvlan_eth_hash(const unsigned char *addr)
72{
73 u64 value = get_unaligned((u64 *)addr);
74
75 /* only want 6 bytes */
76#ifdef __BIG_ENDIAN
77 value >>= 16;
78#else
79 value <<= 16;
80#endif
81 return hash_64(value, MACVLAN_HASH_BITS);
82}
83
Eric Dumazete052f7e2013-03-30 10:08:44 +000084static struct macvlan_port *macvlan_port_get_rcu(const struct net_device *dev)
85{
86 return rcu_dereference(dev->rx_handler_data);
87}
88
89static struct macvlan_port *macvlan_port_get_rtnl(const struct net_device *dev)
90{
91 return rtnl_dereference(dev->rx_handler_data);
92}
93
Jiri Pirkoa35e2c12010-06-15 03:27:57 +000094#define macvlan_port_exists(dev) (dev->priv_flags & IFF_MACVLAN_PORT)
95
Patrick McHardyb863ceb2007-07-14 18:55:06 -070096static struct macvlan_dev *macvlan_hash_lookup(const struct macvlan_port *port,
97 const unsigned char *addr)
98{
99 struct macvlan_dev *vlan;
Michael Braun79cf79a2014-09-25 16:31:08 +0200100 u32 idx = macvlan_eth_hash(addr);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700101
Michael Braun79cf79a2014-09-25 16:31:08 +0200102 hlist_for_each_entry_rcu(vlan, &port->vlan_hash[idx], hlist) {
Joe Perchesa6700db2012-05-09 17:04:04 +0000103 if (ether_addr_equal_64bits(vlan->dev->dev_addr, addr))
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700104 return vlan;
105 }
106 return NULL;
107}
108
Michael Braun79cf79a2014-09-25 16:31:08 +0200109static struct macvlan_source_entry *macvlan_hash_lookup_source(
110 const struct macvlan_dev *vlan,
111 const unsigned char *addr)
112{
113 struct macvlan_source_entry *entry;
114 u32 idx = macvlan_eth_hash(addr);
115 struct hlist_head *h = &vlan->port->vlan_source_hash[idx];
116
117 hlist_for_each_entry_rcu(entry, h, hlist) {
118 if (ether_addr_equal_64bits(entry->addr, addr) &&
119 entry->vlan == vlan)
120 return entry;
121 }
122 return NULL;
123}
124
125static int macvlan_hash_add_source(struct macvlan_dev *vlan,
126 const unsigned char *addr)
127{
128 struct macvlan_port *port = vlan->port;
129 struct macvlan_source_entry *entry;
130 struct hlist_head *h;
131
132 entry = macvlan_hash_lookup_source(vlan, addr);
133 if (entry)
134 return 0;
135
136 entry = kmalloc(sizeof(*entry), GFP_KERNEL);
137 if (!entry)
138 return -ENOMEM;
139
140 ether_addr_copy(entry->addr, addr);
141 entry->vlan = vlan;
142 h = &port->vlan_source_hash[macvlan_eth_hash(addr)];
143 hlist_add_head_rcu(&entry->hlist, h);
144 vlan->macaddr_count++;
145
146 return 0;
147}
148
Eric Biedermanf9ac30f2009-03-13 13:16:13 -0700149static void macvlan_hash_add(struct macvlan_dev *vlan)
150{
151 struct macvlan_port *port = vlan->port;
152 const unsigned char *addr = vlan->dev->dev_addr;
Michael Braun79cf79a2014-09-25 16:31:08 +0200153 u32 idx = macvlan_eth_hash(addr);
Eric Biedermanf9ac30f2009-03-13 13:16:13 -0700154
Michael Braun79cf79a2014-09-25 16:31:08 +0200155 hlist_add_head_rcu(&vlan->hlist, &port->vlan_hash[idx]);
156}
157
158static void macvlan_hash_del_source(struct macvlan_source_entry *entry)
159{
160 hlist_del_rcu(&entry->hlist);
161 kfree_rcu(entry, rcu);
Eric Biedermanf9ac30f2009-03-13 13:16:13 -0700162}
163
Eric Dumazet449f4542011-05-19 12:24:16 +0000164static void macvlan_hash_del(struct macvlan_dev *vlan, bool sync)
Eric Biedermanf9ac30f2009-03-13 13:16:13 -0700165{
166 hlist_del_rcu(&vlan->hlist);
Eric Dumazet449f4542011-05-19 12:24:16 +0000167 if (sync)
168 synchronize_rcu();
Eric Biedermanf9ac30f2009-03-13 13:16:13 -0700169}
170
171static void macvlan_hash_change_addr(struct macvlan_dev *vlan,
172 const unsigned char *addr)
173{
Eric Dumazet449f4542011-05-19 12:24:16 +0000174 macvlan_hash_del(vlan, true);
Eric Biedermanf9ac30f2009-03-13 13:16:13 -0700175 /* Now that we are unhashed it is safe to change the device
176 * address without confusing packet delivery.
177 */
178 memcpy(vlan->dev->dev_addr, addr, ETH_ALEN);
179 macvlan_hash_add(vlan);
180}
181
182static int macvlan_addr_busy(const struct macvlan_port *port,
183 const unsigned char *addr)
184{
185 /* Test to see if the specified multicast address is
186 * currently in use by the underlying device or
187 * another macvlan.
188 */
Joe Perchesa6700db2012-05-09 17:04:04 +0000189 if (ether_addr_equal_64bits(port->dev->dev_addr, addr))
Eric Biedermanf9ac30f2009-03-13 13:16:13 -0700190 return 1;
191
192 if (macvlan_hash_lookup(port, addr))
193 return 1;
194
195 return 0;
196}
197
Arnd Bergmanna1e514c2009-11-26 06:07:09 +0000198
Arnd Bergmannfc0663d2010-01-30 12:23:40 +0000199static int macvlan_broadcast_one(struct sk_buff *skb,
200 const struct macvlan_dev *vlan,
Arnd Bergmann618e1b72009-11-26 06:07:10 +0000201 const struct ethhdr *eth, bool local)
Arnd Bergmanna1e514c2009-11-26 06:07:09 +0000202{
Arnd Bergmannfc0663d2010-01-30 12:23:40 +0000203 struct net_device *dev = vlan->dev;
Arnd Bergmanna1e514c2009-11-26 06:07:09 +0000204
Arnd Bergmann618e1b72009-11-26 06:07:10 +0000205 if (local)
Herbert Xu412ca152014-04-17 13:45:59 +0800206 return __dev_forward_skb(dev, skb);
Arnd Bergmann618e1b72009-11-26 06:07:10 +0000207
Arnd Bergmanna1e514c2009-11-26 06:07:09 +0000208 skb->dev = dev;
Joe Perchesa6700db2012-05-09 17:04:04 +0000209 if (ether_addr_equal_64bits(eth->h_dest, dev->broadcast))
Arnd Bergmanna1e514c2009-11-26 06:07:09 +0000210 skb->pkt_type = PACKET_BROADCAST;
211 else
212 skb->pkt_type = PACKET_MULTICAST;
213
Herbert Xu412ca152014-04-17 13:45:59 +0800214 return 0;
Arnd Bergmanna1e514c2009-11-26 06:07:09 +0000215}
216
Eric Dumazet3807ff52013-02-07 16:41:02 +0000217static u32 macvlan_hash_mix(const struct macvlan_dev *vlan)
218{
219 return (u32)(((unsigned long)vlan) >> L1_CACHE_SHIFT);
220}
221
222
223static unsigned int mc_hash(const struct macvlan_dev *vlan,
224 const unsigned char *addr)
Eric Dumazetcd431e72013-02-05 20:22:50 +0000225{
226 u32 val = __get_unaligned_cpu32(addr + 2);
227
Eric Dumazet3807ff52013-02-07 16:41:02 +0000228 val ^= macvlan_hash_mix(vlan);
Eric Dumazetcd431e72013-02-05 20:22:50 +0000229 return hash_32(val, MACVLAN_MC_FILTER_BITS);
230}
231
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700232static void macvlan_broadcast(struct sk_buff *skb,
Arnd Bergmann618e1b72009-11-26 06:07:10 +0000233 const struct macvlan_port *port,
234 struct net_device *src,
235 enum macvlan_mode mode)
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700236{
237 const struct ethhdr *eth = eth_hdr(skb);
238 const struct macvlan_dev *vlan;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700239 struct sk_buff *nskb;
240 unsigned int i;
Arnd Bergmanna1e514c2009-11-26 06:07:09 +0000241 int err;
Eric Dumazet3807ff52013-02-07 16:41:02 +0000242 unsigned int hash;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700243
Patrick McHardyefbbced2008-11-26 15:30:48 -0800244 if (skb->protocol == htons(ETH_P_PAUSE))
245 return;
246
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700247 for (i = 0; i < MACVLAN_HASH_SIZE; i++) {
Sasha Levinb67bfe02013-02-27 17:06:00 -0800248 hlist_for_each_entry_rcu(vlan, &port->vlan_hash[i], hlist) {
Arnd Bergmann618e1b72009-11-26 06:07:10 +0000249 if (vlan->dev == src || !(vlan->mode & mode))
250 continue;
251
Eric Dumazet3807ff52013-02-07 16:41:02 +0000252 hash = mc_hash(vlan, eth->h_dest);
Eric Dumazetcd431e72013-02-05 20:22:50 +0000253 if (!test_bit(hash, vlan->mc_filter))
254 continue;
Herbert Xude9e8f32013-09-07 12:27:11 +1000255
256 err = NET_RX_DROP;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700257 nskb = skb_clone(skb, GFP_ATOMIC);
Herbert Xude9e8f32013-09-07 12:27:11 +1000258 if (likely(nskb))
259 err = macvlan_broadcast_one(
260 nskb, vlan, eth,
Herbert Xu412ca152014-04-17 13:45:59 +0800261 mode == MACVLAN_MODE_BRIDGE) ?:
262 netif_rx_ni(nskb);
Arnd Bergmanna1e514c2009-11-26 06:07:09 +0000263 macvlan_count_rx(vlan, skb->len + ETH_HLEN,
jbaron@akamai.com4c979932014-10-10 03:13:27 +0000264 err == NET_RX_SUCCESS, true);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700265 }
266 }
267}
268
Herbert Xu412ca152014-04-17 13:45:59 +0800269static void macvlan_process_broadcast(struct work_struct *w)
270{
271 struct macvlan_port *port = container_of(w, struct macvlan_port,
272 bc_work);
273 struct sk_buff *skb;
274 struct sk_buff_head list;
275
Eric Dumazetfe0ca732014-10-22 19:43:46 -0700276 __skb_queue_head_init(&list);
Herbert Xu412ca152014-04-17 13:45:59 +0800277
278 spin_lock_bh(&port->bc_queue.lock);
279 skb_queue_splice_tail_init(&port->bc_queue, &list);
280 spin_unlock_bh(&port->bc_queue.lock);
281
282 while ((skb = __skb_dequeue(&list))) {
283 const struct macvlan_dev *src = MACVLAN_SKB_CB(skb)->src;
284
285 rcu_read_lock();
286
287 if (!src)
288 /* frame comes from an external address */
289 macvlan_broadcast(skb, port, NULL,
290 MACVLAN_MODE_PRIVATE |
291 MACVLAN_MODE_VEPA |
292 MACVLAN_MODE_PASSTHRU|
293 MACVLAN_MODE_BRIDGE);
294 else if (src->mode == MACVLAN_MODE_VEPA)
295 /* flood to everyone except source */
296 macvlan_broadcast(skb, port, src->dev,
297 MACVLAN_MODE_VEPA |
298 MACVLAN_MODE_BRIDGE);
299 else
300 /*
301 * flood only to VEPA ports, bridge ports
302 * already saw the frame on the way out.
303 */
304 macvlan_broadcast(skb, port, src->dev,
305 MACVLAN_MODE_VEPA);
306
307 rcu_read_unlock();
308
Herbert Xu260916d2016-06-01 11:43:00 +0800309 if (src)
310 dev_put(src->dev);
Herbert Xu412ca152014-04-17 13:45:59 +0800311 kfree_skb(skb);
312 }
313}
314
315static void macvlan_broadcast_enqueue(struct macvlan_port *port,
Herbert Xu260916d2016-06-01 11:43:00 +0800316 const struct macvlan_dev *src,
Herbert Xu412ca152014-04-17 13:45:59 +0800317 struct sk_buff *skb)
318{
Herbert Xue676f192014-04-22 17:15:34 +0800319 struct sk_buff *nskb;
Herbert Xu412ca152014-04-17 13:45:59 +0800320 int err = -ENOMEM;
321
Herbert Xue676f192014-04-22 17:15:34 +0800322 nskb = skb_clone(skb, GFP_ATOMIC);
323 if (!nskb)
Herbert Xu412ca152014-04-17 13:45:59 +0800324 goto err;
325
Herbert Xu260916d2016-06-01 11:43:00 +0800326 MACVLAN_SKB_CB(nskb)->src = src;
327
Herbert Xu412ca152014-04-17 13:45:59 +0800328 spin_lock(&port->bc_queue.lock);
Nicolas Dichtel07d92d52014-09-17 10:08:08 +0200329 if (skb_queue_len(&port->bc_queue) < MACVLAN_BC_QUEUE_LEN) {
Herbert Xu260916d2016-06-01 11:43:00 +0800330 if (src)
331 dev_hold(src->dev);
Herbert Xue676f192014-04-22 17:15:34 +0800332 __skb_queue_tail(&port->bc_queue, nskb);
Herbert Xu412ca152014-04-17 13:45:59 +0800333 err = 0;
334 }
335 spin_unlock(&port->bc_queue.lock);
336
337 if (err)
Herbert Xue676f192014-04-22 17:15:34 +0800338 goto free_nskb;
Herbert Xu412ca152014-04-17 13:45:59 +0800339
340 schedule_work(&port->bc_work);
341 return;
342
Herbert Xue676f192014-04-22 17:15:34 +0800343free_nskb:
344 kfree_skb(nskb);
Herbert Xu412ca152014-04-17 13:45:59 +0800345err:
346 atomic_long_inc(&skb->dev->rx_dropped);
347}
348
Michael Braun79cf79a2014-09-25 16:31:08 +0200349static void macvlan_flush_sources(struct macvlan_port *port,
350 struct macvlan_dev *vlan)
351{
352 int i;
353
354 for (i = 0; i < MACVLAN_HASH_SIZE; i++) {
355 struct hlist_node *h, *n;
356
357 hlist_for_each_safe(h, n, &port->vlan_source_hash[i]) {
358 struct macvlan_source_entry *entry;
359
360 entry = hlist_entry(h, struct macvlan_source_entry,
361 hlist);
362 if (entry->vlan == vlan)
363 macvlan_hash_del_source(entry);
364 }
365 }
366 vlan->macaddr_count = 0;
367}
368
369static void macvlan_forward_source_one(struct sk_buff *skb,
370 struct macvlan_dev *vlan)
371{
372 struct sk_buff *nskb;
373 struct net_device *dev;
374 int len;
375 int ret;
376
377 dev = vlan->dev;
378 if (unlikely(!(dev->flags & IFF_UP)))
379 return;
380
381 nskb = skb_clone(skb, GFP_ATOMIC);
382 if (!nskb)
383 return;
384
385 len = nskb->len + ETH_HLEN;
386 nskb->dev = dev;
387 nskb->pkt_type = PACKET_HOST;
388
389 ret = netif_rx(nskb);
jbaron@akamai.com4c979932014-10-10 03:13:27 +0000390 macvlan_count_rx(vlan, len, ret == NET_RX_SUCCESS, false);
Michael Braun79cf79a2014-09-25 16:31:08 +0200391}
392
393static void macvlan_forward_source(struct sk_buff *skb,
394 struct macvlan_port *port,
395 const unsigned char *addr)
396{
397 struct macvlan_source_entry *entry;
398 u32 idx = macvlan_eth_hash(addr);
399 struct hlist_head *h = &port->vlan_source_hash[idx];
400
401 hlist_for_each_entry_rcu(entry, h, hlist) {
402 if (ether_addr_equal_64bits(entry->addr, addr))
403 if (entry->vlan->dev->flags & IFF_UP)
404 macvlan_forward_source_one(skb, entry->vlan);
405 }
406}
407
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700408/* called under rcu_read_lock() from netif_receive_skb */
Jiri Pirko8a4eb572011-03-12 03:14:39 +0000409static rx_handler_result_t macvlan_handle_frame(struct sk_buff **pskb)
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700410{
Jiri Pirkoab95bfe2010-06-01 21:52:08 +0000411 struct macvlan_port *port;
Jiri Pirko8a4eb572011-03-12 03:14:39 +0000412 struct sk_buff *skb = *pskb;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700413 const struct ethhdr *eth = eth_hdr(skb);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700414 const struct macvlan_dev *vlan;
Arnd Bergmann618e1b72009-11-26 06:07:10 +0000415 const struct macvlan_dev *src;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700416 struct net_device *dev;
Sridhar Samudralaba018772010-07-27 09:10:07 +0000417 unsigned int len = 0;
jbaron@akamai.comd1dd91192014-10-10 03:13:31 +0000418 int ret;
419 rx_handler_result_t handle_res;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700420
Jiri Pirkoa35e2c12010-06-15 03:27:57 +0000421 port = macvlan_port_get_rcu(skb->dev);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700422 if (is_multicast_ether_addr(eth->h_dest)) {
Herbert Xu9c127a02016-06-01 11:45:44 +0800423 unsigned int hash;
424
Eric W. Biederman19bcf9f2015-10-09 13:44:54 -0500425 skb = ip_check_defrag(dev_net(skb->dev), skb, IP_DEFRAG_MACVLAN);
Eric Dumazetbc416d92011-10-06 10:28:31 +0000426 if (!skb)
427 return RX_HANDLER_CONSUMED;
Sabrina Dubrocae639b8d2015-11-16 22:54:20 +0100428 *pskb = skb;
Eric Dumazet4ec7ac12012-01-23 05:38:59 +0000429 eth = eth_hdr(skb);
Michael Braun79cf79a2014-09-25 16:31:08 +0200430 macvlan_forward_source(skb, port, eth->h_source);
Arnd Bergmann618e1b72009-11-26 06:07:10 +0000431 src = macvlan_hash_lookup(port, eth->h_source);
Herbert Xu412ca152014-04-17 13:45:59 +0800432 if (src && src->mode != MACVLAN_MODE_VEPA &&
433 src->mode != MACVLAN_MODE_BRIDGE) {
stephen hemminger729e72a2011-11-02 12:11:53 +0000434 /* forward to original port. */
435 vlan = src;
Herbert Xu412ca152014-04-17 13:45:59 +0800436 ret = macvlan_broadcast_one(skb, vlan, eth, 0) ?:
437 netif_rx(skb);
jbaron@akamai.comd1dd91192014-10-10 03:13:31 +0000438 handle_res = RX_HANDLER_CONSUMED;
stephen hemminger729e72a2011-11-02 12:11:53 +0000439 goto out;
440 }
441
Herbert Xu9c127a02016-06-01 11:45:44 +0800442 hash = mc_hash(NULL, eth->h_dest);
443 if (test_bit(hash, port->mc_filter))
444 macvlan_broadcast_enqueue(port, src, skb);
Herbert Xu412ca152014-04-17 13:45:59 +0800445
Jiri Pirko8a4eb572011-03-12 03:14:39 +0000446 return RX_HANDLER_PASS;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700447 }
448
Michael Braun79cf79a2014-09-25 16:31:08 +0200449 macvlan_forward_source(skb, port, eth->h_source);
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +0000450 if (port->passthru)
Jiri Pirko233c7df2013-05-09 04:23:40 +0000451 vlan = list_first_or_null_rcu(&port->vlans,
452 struct macvlan_dev, list);
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +0000453 else
454 vlan = macvlan_hash_lookup(port, eth->h_dest);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700455 if (vlan == NULL)
Jiri Pirko8a4eb572011-03-12 03:14:39 +0000456 return RX_HANDLER_PASS;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700457
458 dev = vlan->dev;
459 if (unlikely(!(dev->flags & IFF_UP))) {
460 kfree_skb(skb);
Jiri Pirko8a4eb572011-03-12 03:14:39 +0000461 return RX_HANDLER_CONSUMED;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700462 }
Arnd Bergmanna1e514c2009-11-26 06:07:09 +0000463 len = skb->len + ETH_HLEN;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700464 skb = skb_share_check(skb, GFP_ATOMIC);
jbaron@akamai.comd1dd91192014-10-10 03:13:31 +0000465 if (!skb) {
466 ret = NET_RX_DROP;
467 handle_res = RX_HANDLER_CONSUMED;
Sridhar Samudralaba018772010-07-27 09:10:07 +0000468 goto out;
jbaron@akamai.comd1dd91192014-10-10 03:13:31 +0000469 }
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700470
Sabrina Dubrocae639b8d2015-11-16 22:54:20 +0100471 *pskb = skb;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700472 skb->dev = dev;
473 skb->pkt_type = PACKET_HOST;
474
jbaron@akamai.comd1dd91192014-10-10 03:13:31 +0000475 ret = NET_RX_SUCCESS;
476 handle_res = RX_HANDLER_ANOTHER;
Sridhar Samudralaba018772010-07-27 09:10:07 +0000477out:
jbaron@akamai.com4c979932014-10-10 03:13:27 +0000478 macvlan_count_rx(vlan, len, ret == NET_RX_SUCCESS, false);
jbaron@akamai.comd1dd91192014-10-10 03:13:31 +0000479 return handle_res;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700480}
481
Arnd Bergmann618e1b72009-11-26 06:07:10 +0000482static int macvlan_queue_xmit(struct sk_buff *skb, struct net_device *dev)
483{
484 const struct macvlan_dev *vlan = netdev_priv(dev);
485 const struct macvlan_port *port = vlan->port;
486 const struct macvlan_dev *dest;
487
488 if (vlan->mode == MACVLAN_MODE_BRIDGE) {
489 const struct ethhdr *eth = (void *)skb->data;
490
491 /* send to other bridge ports directly */
492 if (is_multicast_ether_addr(eth->h_dest)) {
493 macvlan_broadcast(skb, port, dev, MACVLAN_MODE_BRIDGE);
494 goto xmit_world;
495 }
496
497 dest = macvlan_hash_lookup(port, eth->h_dest);
498 if (dest && dest->mode == MACVLAN_MODE_BRIDGE) {
David Warda37dd332011-05-19 02:53:20 +0000499 /* send to lowerdev first for its network taps */
David Wardcb2d0f32011-09-18 12:53:20 +0000500 dev_forward_skb(vlan->lowerdev, skb);
Arnd Bergmann618e1b72009-11-26 06:07:10 +0000501
502 return NET_XMIT_SUCCESS;
503 }
504 }
505
506xmit_world:
David S. Miller59b99972012-05-10 23:03:34 -0400507 skb->dev = vlan->lowerdev;
Arnd Bergmann618e1b72009-11-26 06:07:10 +0000508 return dev_queue_xmit(skb);
509}
510
dingtianhong688cea82014-05-30 16:00:56 +0800511static inline netdev_tx_t macvlan_netpoll_send_skb(struct macvlan_dev *vlan, struct sk_buff *skb)
512{
513#ifdef CONFIG_NET_POLL_CONTROLLER
514 if (vlan->netpoll)
515 netpoll_send_skb(vlan->netpoll, skb);
516#else
517 BUG();
518#endif
519 return NETDEV_TX_OK;
520}
521
stephen hemminger0db901b2013-12-27 12:06:46 -0800522static netdev_tx_t macvlan_start_xmit(struct sk_buff *skb,
523 struct net_device *dev)
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700524{
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700525 unsigned int len = skb->len;
526 int ret;
dingtianhong688cea82014-05-30 16:00:56 +0800527 struct macvlan_dev *vlan = netdev_priv(dev);
528
529 if (unlikely(netpoll_tx_running(dev)))
530 return macvlan_netpoll_send_skb(vlan, skb);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700531
John Fastabenda6cc0cf2013-11-06 09:54:46 -0800532 if (vlan->fwd_priv) {
533 skb->dev = vlan->lowerdev;
Jason Wangf663dd92014-01-10 16:18:26 +0800534 ret = dev_queue_xmit_accel(skb, vlan->fwd_priv);
John Fastabenda6cc0cf2013-11-06 09:54:46 -0800535 } else {
536 ret = macvlan_queue_xmit(skb, dev);
537 }
538
Eric Dumazet2d6c9ff2010-05-10 04:51:02 +0000539 if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) {
Li RongQingcdf3e272014-01-04 14:22:34 +0800540 struct vlan_pcpu_stats *pcpu_stats;
Eric Dumazet2c114552009-09-03 00:11:45 +0000541
Eric Dumazet8ffab512010-11-10 21:14:04 +0000542 pcpu_stats = this_cpu_ptr(vlan->pcpu_stats);
543 u64_stats_update_begin(&pcpu_stats->syncp);
544 pcpu_stats->tx_packets++;
545 pcpu_stats->tx_bytes += len;
546 u64_stats_update_end(&pcpu_stats->syncp);
547 } else {
548 this_cpu_inc(vlan->pcpu_stats->tx_dropped);
549 }
Patrick McHardycbbef5e2009-11-10 06:14:24 +0000550 return ret;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700551}
552
553static int macvlan_hard_header(struct sk_buff *skb, struct net_device *dev,
Stephen Hemminger3b04ddd2007-10-09 01:40:57 -0700554 unsigned short type, const void *daddr,
555 const void *saddr, unsigned len)
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700556{
557 const struct macvlan_dev *vlan = netdev_priv(dev);
558 struct net_device *lowerdev = vlan->lowerdev;
559
Stephen Hemminger0c4e8582007-10-09 01:36:32 -0700560 return dev_hard_header(skb, lowerdev, type, daddr,
561 saddr ? : dev->dev_addr, len);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700562}
563
Stephen Hemminger3b04ddd2007-10-09 01:40:57 -0700564static const struct header_ops macvlan_hard_header_ops = {
565 .create = macvlan_hard_header,
Stephen Hemminger3b04ddd2007-10-09 01:40:57 -0700566 .parse = eth_header_parse,
Stephen Hemminger3b04ddd2007-10-09 01:40:57 -0700567 .cache = eth_header_cache,
568 .cache_update = eth_header_cache_update,
569};
570
Jason Wangb13ba1b2014-01-10 16:18:25 +0800571static struct rtnl_link_ops macvlan_link_ops;
572
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700573static int macvlan_open(struct net_device *dev)
574{
575 struct macvlan_dev *vlan = netdev_priv(dev);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700576 struct net_device *lowerdev = vlan->lowerdev;
577 int err;
578
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +0000579 if (vlan->port->passthru) {
Michael S. Tsirkin78738142013-08-01 13:50:10 +0300580 if (!(vlan->flags & MACVLAN_FLAG_NOPROMISC)) {
581 err = dev_set_promiscuity(lowerdev, 1);
582 if (err < 0)
583 goto out;
584 }
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +0000585 goto hash_add;
586 }
587
Jason Wangb13ba1b2014-01-10 16:18:25 +0800588 if (lowerdev->features & NETIF_F_HW_L2FW_DOFFLOAD &&
589 dev->rtnl_link_ops == &macvlan_link_ops) {
John Fastabenda6cc0cf2013-11-06 09:54:46 -0800590 vlan->fwd_priv =
591 lowerdev->netdev_ops->ndo_dfwd_add_station(lowerdev, dev);
592
593 /* If we get a NULL pointer back, or if we get an error
594 * then we should just fall through to the non accelerated path
595 */
596 if (IS_ERR_OR_NULL(vlan->fwd_priv)) {
597 vlan->fwd_priv = NULL;
Jason Wangf663dd92014-01-10 16:18:26 +0800598 } else
John Fastabenda6cc0cf2013-11-06 09:54:46 -0800599 return 0;
John Fastabenda6cc0cf2013-11-06 09:54:46 -0800600 }
601
Eric Biedermanf9ac30f2009-03-13 13:16:13 -0700602 err = -EBUSY;
603 if (macvlan_addr_busy(vlan->port, dev->dev_addr))
604 goto out;
605
Jiri Pirkoa748ee22010-04-01 21:22:09 +0000606 err = dev_uc_add(lowerdev, dev->dev_addr);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700607 if (err < 0)
Wang Chenb89fb7d2008-07-14 20:57:07 -0700608 goto out;
609 if (dev->flags & IFF_ALLMULTI) {
610 err = dev_set_allmulti(lowerdev, 1);
611 if (err < 0)
612 goto del_unicast;
613 }
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +0000614
Vlad Yasevichefdbd2b2015-05-01 17:36:37 -0400615 if (dev->flags & IFF_PROMISC) {
616 err = dev_set_promiscuity(lowerdev, 1);
617 if (err < 0)
618 goto clear_multi;
619 }
620
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +0000621hash_add:
Eric Biedermanf9ac30f2009-03-13 13:16:13 -0700622 macvlan_hash_add(vlan);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700623 return 0;
Wang Chenb89fb7d2008-07-14 20:57:07 -0700624
Vlad Yasevichefdbd2b2015-05-01 17:36:37 -0400625clear_multi:
626 dev_set_allmulti(lowerdev, -1);
Wang Chenb89fb7d2008-07-14 20:57:07 -0700627del_unicast:
Jiri Pirkoa748ee22010-04-01 21:22:09 +0000628 dev_uc_del(lowerdev, dev->dev_addr);
Wang Chenb89fb7d2008-07-14 20:57:07 -0700629out:
John Fastabenda6cc0cf2013-11-06 09:54:46 -0800630 if (vlan->fwd_priv) {
631 lowerdev->netdev_ops->ndo_dfwd_del_station(lowerdev,
632 vlan->fwd_priv);
633 vlan->fwd_priv = NULL;
634 }
Wang Chenb89fb7d2008-07-14 20:57:07 -0700635 return err;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700636}
637
638static int macvlan_stop(struct net_device *dev)
639{
640 struct macvlan_dev *vlan = netdev_priv(dev);
641 struct net_device *lowerdev = vlan->lowerdev;
642
John Fastabenda6cc0cf2013-11-06 09:54:46 -0800643 if (vlan->fwd_priv) {
644 lowerdev->netdev_ops->ndo_dfwd_del_station(lowerdev,
645 vlan->fwd_priv);
646 vlan->fwd_priv = NULL;
647 return 0;
648 }
649
John Fastabenddf8ef8f2012-04-15 06:44:37 +0000650 dev_uc_unsync(lowerdev, dev);
651 dev_mc_unsync(lowerdev, dev);
652
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +0000653 if (vlan->port->passthru) {
John Fastabenddf8ef8f2012-04-15 06:44:37 +0000654 if (!(vlan->flags & MACVLAN_FLAG_NOPROMISC))
655 dev_set_promiscuity(lowerdev, -1);
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +0000656 goto hash_del;
657 }
658
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700659 if (dev->flags & IFF_ALLMULTI)
660 dev_set_allmulti(lowerdev, -1);
661
Vlad Yasevichefdbd2b2015-05-01 17:36:37 -0400662 if (dev->flags & IFF_PROMISC)
663 dev_set_promiscuity(lowerdev, -1);
664
Jiri Pirkoa748ee22010-04-01 21:22:09 +0000665 dev_uc_del(lowerdev, dev->dev_addr);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700666
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +0000667hash_del:
Eric Dumazet449f4542011-05-19 12:24:16 +0000668 macvlan_hash_del(vlan, !dev->dismantle);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700669 return 0;
670}
671
dingtianhonge289fd22014-05-30 14:32:49 +0800672static int macvlan_sync_address(struct net_device *dev, unsigned char *addr)
Patrick McHardyad5d20a2007-11-19 22:00:42 -0800673{
674 struct macvlan_dev *vlan = netdev_priv(dev);
675 struct net_device *lowerdev = vlan->lowerdev;
Patrick McHardyad5d20a2007-11-19 22:00:42 -0800676 int err;
677
dingtianhonge289fd22014-05-30 14:32:49 +0800678 if (!(dev->flags & IFF_UP)) {
679 /* Just copy in the new address */
680 ether_addr_copy(dev->dev_addr, addr);
681 } else {
682 /* Rehash and update the device filters */
683 if (macvlan_addr_busy(vlan->port, addr))
684 return -EBUSY;
685
686 if (!vlan->port->passthru) {
687 err = dev_uc_add(lowerdev, addr);
688 if (err)
689 return err;
690
691 dev_uc_del(lowerdev, dev->dev_addr);
692 }
693
694 macvlan_hash_change_addr(vlan, addr);
695 }
696 return 0;
697}
698
699static int macvlan_set_mac_address(struct net_device *dev, void *p)
700{
701 struct macvlan_dev *vlan = netdev_priv(dev);
702 struct sockaddr *addr = p;
703
Patrick McHardyad5d20a2007-11-19 22:00:42 -0800704 if (!is_valid_ether_addr(addr->sa_data))
705 return -EADDRNOTAVAIL;
706
dingtianhonge289fd22014-05-30 14:32:49 +0800707 if (vlan->mode == MACVLAN_MODE_PASSTHRU) {
708 dev_set_mac_address(vlan->lowerdev, addr);
709 return 0;
Eric Biedermanf9ac30f2009-03-13 13:16:13 -0700710 }
dingtianhonge289fd22014-05-30 14:32:49 +0800711
712 return macvlan_sync_address(dev, addr->sa_data);
Patrick McHardyad5d20a2007-11-19 22:00:42 -0800713}
714
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700715static void macvlan_change_rx_flags(struct net_device *dev, int change)
716{
717 struct macvlan_dev *vlan = netdev_priv(dev);
718 struct net_device *lowerdev = vlan->lowerdev;
719
Peter Christensenbbeb0ea2014-05-08 11:15:37 +0200720 if (dev->flags & IFF_UP) {
721 if (change & IFF_ALLMULTI)
722 dev_set_allmulti(lowerdev, dev->flags & IFF_ALLMULTI ? 1 : -1);
Vlad Yasevichefdbd2b2015-05-01 17:36:37 -0400723 if (change & IFF_PROMISC)
724 dev_set_promiscuity(lowerdev,
725 dev->flags & IFF_PROMISC ? 1 : -1);
726
Peter Christensenbbeb0ea2014-05-08 11:15:37 +0200727 }
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700728}
729
Herbert Xu9c127a02016-06-01 11:45:44 +0800730static void macvlan_compute_filter(unsigned long *mc_filter,
731 struct net_device *dev,
732 struct macvlan_dev *vlan)
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700733{
Eric Dumazetcd431e72013-02-05 20:22:50 +0000734 if (dev->flags & (IFF_PROMISC | IFF_ALLMULTI)) {
Herbert Xu9c127a02016-06-01 11:45:44 +0800735 bitmap_fill(mc_filter, MACVLAN_MC_FILTER_SZ);
Eric Dumazetcd431e72013-02-05 20:22:50 +0000736 } else {
737 struct netdev_hw_addr *ha;
738 DECLARE_BITMAP(filter, MACVLAN_MC_FILTER_SZ);
739
740 bitmap_zero(filter, MACVLAN_MC_FILTER_SZ);
741 netdev_for_each_mc_addr(ha, dev) {
Eric Dumazet3807ff52013-02-07 16:41:02 +0000742 __set_bit(mc_hash(vlan, ha->addr), filter);
Eric Dumazetcd431e72013-02-05 20:22:50 +0000743 }
Eric Dumazetd5270432013-02-07 16:02:57 +0000744
Eric Dumazet3807ff52013-02-07 16:41:02 +0000745 __set_bit(mc_hash(vlan, dev->broadcast), filter);
Eric Dumazetd5270432013-02-07 16:02:57 +0000746
Herbert Xu9c127a02016-06-01 11:45:44 +0800747 bitmap_copy(mc_filter, filter, MACVLAN_MC_FILTER_SZ);
Eric Dumazetcd431e72013-02-05 20:22:50 +0000748 }
Herbert Xu9c127a02016-06-01 11:45:44 +0800749}
750
751static void macvlan_set_mac_lists(struct net_device *dev)
752{
753 struct macvlan_dev *vlan = netdev_priv(dev);
754
755 macvlan_compute_filter(vlan->mc_filter, dev, vlan);
756
John Fastabenddf8ef8f2012-04-15 06:44:37 +0000757 dev_uc_sync(vlan->lowerdev, dev);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700758 dev_mc_sync(vlan->lowerdev, dev);
Herbert Xu9c127a02016-06-01 11:45:44 +0800759
760 /* This is slightly inaccurate as we're including the subscription
761 * list of vlan->lowerdev too.
762 *
763 * Bug alert: This only works if everyone has the same broadcast
764 * address as lowerdev. As soon as someone changes theirs this
765 * will break.
766 *
767 * However, this is already broken as when you change your broadcast
768 * address we don't get called.
769 *
770 * The solution is to maintain a list of broadcast addresses like
771 * we do for uc/mc, if you care.
772 */
773 macvlan_compute_filter(vlan->port->mc_filter, vlan->lowerdev, NULL);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700774}
775
776static int macvlan_change_mtu(struct net_device *dev, int new_mtu)
777{
778 struct macvlan_dev *vlan = netdev_priv(dev);
779
780 if (new_mtu < 68 || vlan->lowerdev->mtu < new_mtu)
781 return -EINVAL;
782 dev->mtu = new_mtu;
783 return 0;
784}
785
786/*
787 * macvlan network devices have devices nesting below it and are a special
788 * "super class" of normal network devices; split their locks off into a
789 * separate class since they always nest.
790 */
David S. Millercf508b12008-07-22 14:16:42 -0700791static struct lock_class_key macvlan_netdev_addr_lock_key;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700792
Vlad Yasevich8b4703e2014-03-03 15:33:53 -0500793#define ALWAYS_ON_FEATURES \
Tom Herbertc8cd0982015-12-14 11:19:44 -0800794 (NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_GSO_SOFTWARE | NETIF_F_LLTX | \
Jason Wanga523a5e2014-11-26 17:21:14 +0800795 NETIF_F_GSO_ROBUST)
Vlad Yasevich8b4703e2014-03-03 15:33:53 -0500796
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700797#define MACVLAN_FEATURES \
Tom Herberta1882222015-12-14 11:19:43 -0800798 (NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST | \
Michal Kubeček62dbe832014-12-05 17:05:49 +0100799 NETIF_F_GSO | NETIF_F_TSO | NETIF_F_UFO | NETIF_F_LRO | \
John Fastabend8d13e672011-06-06 04:27:16 +0000800 NETIF_F_TSO_ECN | NETIF_F_TSO6 | NETIF_F_GRO | NETIF_F_RXCSUM | \
Patrick McHardy28d2b132013-04-19 02:04:32 +0000801 NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_HW_VLAN_STAG_FILTER)
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700802
803#define MACVLAN_STATE_MASK \
804 ((1<<__LINK_STATE_NOCARRIER) | (1<<__LINK_STATE_DORMANT))
805
Vlad Yasevichc674ac32014-05-16 17:04:56 -0400806static int macvlan_get_nest_level(struct net_device *dev)
807{
808 return ((struct macvlan_dev *)netdev_priv(dev))->nest_level;
809}
810
David S. Millerc773e842008-07-08 23:13:53 -0700811static void macvlan_set_lockdep_class(struct net_device *dev)
812{
Eric Dumazet24ffd752016-06-09 07:45:14 -0700813 netdev_lockdep_set_classes(dev);
Vlad Yasevichc674ac32014-05-16 17:04:56 -0400814 lockdep_set_class_and_subclass(&dev->addr_list_lock,
815 &macvlan_netdev_addr_lock_key,
816 macvlan_get_nest_level(dev));
David S. Millerc773e842008-07-08 23:13:53 -0700817}
818
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700819static int macvlan_init(struct net_device *dev)
820{
821 struct macvlan_dev *vlan = netdev_priv(dev);
822 const struct net_device *lowerdev = vlan->lowerdev;
Francesco Ruggeri30837962016-04-23 15:03:32 -0700823 struct macvlan_port *port = vlan->port;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700824
825 dev->state = (dev->state & ~MACVLAN_STATE_MASK) |
826 (lowerdev->state & MACVLAN_STATE_MASK);
827 dev->features = lowerdev->features & MACVLAN_FEATURES;
Vlad Yasevich8b4703e2014-03-03 15:33:53 -0500828 dev->features |= ALWAYS_ON_FEATURES;
Michal Kubeček62dbe832014-12-05 17:05:49 +0100829 dev->hw_features |= NETIF_F_LRO;
Vlad Yasevich081e83a2014-07-31 10:30:25 -0400830 dev->vlan_features = lowerdev->vlan_features & MACVLAN_FEATURES;
Patrick McHardy8c2acc52009-11-23 14:18:53 -0800831 dev->gso_max_size = lowerdev->gso_max_size;
Eric Dumazetf6773c52016-03-16 21:59:49 -0700832 dev->gso_max_segs = lowerdev->gso_max_segs;
sg.tweak@gmail.comef5c8992009-06-10 09:55:02 +0000833 dev->hard_header_len = lowerdev->hard_header_len;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700834
David S. Millerc773e842008-07-08 23:13:53 -0700835 macvlan_set_lockdep_class(dev);
836
WANG Cong1c213bd2014-02-13 11:46:28 -0800837 vlan->pcpu_stats = netdev_alloc_pcpu_stats(struct vlan_pcpu_stats);
Eric Dumazet8ffab512010-11-10 21:14:04 +0000838 if (!vlan->pcpu_stats)
Eric Dumazetfccaf712009-11-17 08:53:49 +0000839 return -ENOMEM;
840
Francesco Ruggeri30837962016-04-23 15:03:32 -0700841 port->count += 1;
842
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700843 return 0;
844}
845
Eric Dumazetfccaf712009-11-17 08:53:49 +0000846static void macvlan_uninit(struct net_device *dev)
847{
848 struct macvlan_dev *vlan = netdev_priv(dev);
Eric W. Biedermand5cd92442011-03-21 18:22:22 -0700849 struct macvlan_port *port = vlan->port;
Eric Dumazetfccaf712009-11-17 08:53:49 +0000850
Eric Dumazet8ffab512010-11-10 21:14:04 +0000851 free_percpu(vlan->pcpu_stats);
Eric W. Biedermand5cd92442011-03-21 18:22:22 -0700852
Michael Braun79cf79a2014-09-25 16:31:08 +0200853 macvlan_flush_sources(port, vlan);
David S. Miller5e3c5162014-08-14 14:32:49 -0700854 port->count -= 1;
855 if (!port->count)
Eric W. Biedermand5cd92442011-03-21 18:22:22 -0700856 macvlan_port_destroy(port->dev);
Eric Dumazetfccaf712009-11-17 08:53:49 +0000857}
858
Eric Dumazet28172732010-07-07 14:58:56 -0700859static struct rtnl_link_stats64 *macvlan_dev_get_stats64(struct net_device *dev,
860 struct rtnl_link_stats64 *stats)
Eric Dumazetfccaf712009-11-17 08:53:49 +0000861{
Eric Dumazetfccaf712009-11-17 08:53:49 +0000862 struct macvlan_dev *vlan = netdev_priv(dev);
863
Eric Dumazet8ffab512010-11-10 21:14:04 +0000864 if (vlan->pcpu_stats) {
Li RongQingcdf3e272014-01-04 14:22:34 +0800865 struct vlan_pcpu_stats *p;
Eric Dumazet8ffab512010-11-10 21:14:04 +0000866 u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes;
867 u32 rx_errors = 0, tx_dropped = 0;
Eric Dumazetbc661542010-06-24 00:54:21 +0000868 unsigned int start;
Eric Dumazetfccaf712009-11-17 08:53:49 +0000869 int i;
870
871 for_each_possible_cpu(i) {
Eric Dumazet8ffab512010-11-10 21:14:04 +0000872 p = per_cpu_ptr(vlan->pcpu_stats, i);
Eric Dumazetbc661542010-06-24 00:54:21 +0000873 do {
Eric W. Biederman57a77442014-03-13 21:26:42 -0700874 start = u64_stats_fetch_begin_irq(&p->syncp);
Eric Dumazetbc661542010-06-24 00:54:21 +0000875 rx_packets = p->rx_packets;
876 rx_bytes = p->rx_bytes;
877 rx_multicast = p->rx_multicast;
Eric Dumazet8ffab512010-11-10 21:14:04 +0000878 tx_packets = p->tx_packets;
879 tx_bytes = p->tx_bytes;
Eric W. Biederman57a77442014-03-13 21:26:42 -0700880 } while (u64_stats_fetch_retry_irq(&p->syncp, start));
Eric Dumazet8ffab512010-11-10 21:14:04 +0000881
882 stats->rx_packets += rx_packets;
883 stats->rx_bytes += rx_bytes;
884 stats->multicast += rx_multicast;
885 stats->tx_packets += tx_packets;
886 stats->tx_bytes += tx_bytes;
887 /* rx_errors & tx_dropped are u32, updated
888 * without syncp protection.
889 */
890 rx_errors += p->rx_errors;
891 tx_dropped += p->tx_dropped;
Eric Dumazetfccaf712009-11-17 08:53:49 +0000892 }
Eric Dumazet8ffab512010-11-10 21:14:04 +0000893 stats->rx_errors = rx_errors;
894 stats->rx_dropped = rx_errors;
895 stats->tx_dropped = tx_dropped;
Eric Dumazetfccaf712009-11-17 08:53:49 +0000896 }
897 return stats;
898}
899
Jiri Pirko8e586132011-12-08 19:52:37 -0500900static int macvlan_vlan_rx_add_vid(struct net_device *dev,
Patrick McHardy80d5c362013-04-19 02:04:28 +0000901 __be16 proto, u16 vid)
John Fastabend8d13e672011-06-06 04:27:16 +0000902{
903 struct macvlan_dev *vlan = netdev_priv(dev);
904 struct net_device *lowerdev = vlan->lowerdev;
John Fastabend8d13e672011-06-06 04:27:16 +0000905
Patrick McHardy80d5c362013-04-19 02:04:28 +0000906 return vlan_vid_add(lowerdev, proto, vid);
John Fastabend8d13e672011-06-06 04:27:16 +0000907}
908
Jiri Pirko8e586132011-12-08 19:52:37 -0500909static int macvlan_vlan_rx_kill_vid(struct net_device *dev,
Patrick McHardy80d5c362013-04-19 02:04:28 +0000910 __be16 proto, u16 vid)
John Fastabend8d13e672011-06-06 04:27:16 +0000911{
912 struct macvlan_dev *vlan = netdev_priv(dev);
913 struct net_device *lowerdev = vlan->lowerdev;
John Fastabend8d13e672011-06-06 04:27:16 +0000914
Patrick McHardy80d5c362013-04-19 02:04:28 +0000915 vlan_vid_del(lowerdev, proto, vid);
Jiri Pirko8e586132011-12-08 19:52:37 -0500916 return 0;
John Fastabend8d13e672011-06-06 04:27:16 +0000917}
918
stephen hemmingeredc7d572012-10-01 12:32:33 +0000919static int macvlan_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
John Fastabenddf8ef8f2012-04-15 06:44:37 +0000920 struct net_device *dev,
Jiri Pirkof6f64242014-11-28 14:34:15 +0100921 const unsigned char *addr, u16 vid,
John Fastabenddf8ef8f2012-04-15 06:44:37 +0000922 u16 flags)
923{
924 struct macvlan_dev *vlan = netdev_priv(dev);
925 int err = -EINVAL;
926
Vlad Yasevich8a50f112014-08-15 13:04:59 -0400927 /* Support unicast filter only on passthru devices.
928 * Multicast filter should be allowed on all devices.
929 */
930 if (!vlan->port->passthru && is_unicast_ether_addr(addr))
John Fastabenddf8ef8f2012-04-15 06:44:37 +0000931 return -EOPNOTSUPP;
932
Thomas Richterab2cfbb2013-07-19 17:20:08 +0200933 if (flags & NLM_F_REPLACE)
934 return -EOPNOTSUPP;
935
John Fastabenddf8ef8f2012-04-15 06:44:37 +0000936 if (is_unicast_ether_addr(addr))
937 err = dev_uc_add_excl(dev, addr);
938 else if (is_multicast_ether_addr(addr))
939 err = dev_mc_add_excl(dev, addr);
940
941 return err;
942}
943
Vlad Yasevich1690be62013-02-13 12:00:18 +0000944static int macvlan_fdb_del(struct ndmsg *ndm, struct nlattr *tb[],
John Fastabenddf8ef8f2012-04-15 06:44:37 +0000945 struct net_device *dev,
Jiri Pirkof6f64242014-11-28 14:34:15 +0100946 const unsigned char *addr, u16 vid)
John Fastabenddf8ef8f2012-04-15 06:44:37 +0000947{
948 struct macvlan_dev *vlan = netdev_priv(dev);
949 int err = -EINVAL;
950
Vlad Yasevich8a50f112014-08-15 13:04:59 -0400951 /* Support unicast filter only on passthru devices.
952 * Multicast filter should be allowed on all devices.
953 */
954 if (!vlan->port->passthru && is_unicast_ether_addr(addr))
John Fastabenddf8ef8f2012-04-15 06:44:37 +0000955 return -EOPNOTSUPP;
956
957 if (is_unicast_ether_addr(addr))
958 err = dev_uc_del(dev, addr);
959 else if (is_multicast_ether_addr(addr))
960 err = dev_mc_del(dev, addr);
961
962 return err;
963}
964
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700965static void macvlan_ethtool_get_drvinfo(struct net_device *dev,
966 struct ethtool_drvinfo *drvinfo)
967{
Jiri Pirko7826d432013-01-06 00:44:26 +0000968 strlcpy(drvinfo->driver, "macvlan", sizeof(drvinfo->driver));
969 strlcpy(drvinfo->version, "0.1", sizeof(drvinfo->version));
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700970}
971
David Decotigny85f95812016-02-24 10:58:04 -0800972static int macvlan_ethtool_get_link_ksettings(struct net_device *dev,
973 struct ethtool_link_ksettings *cmd)
Stephen Hemminger9edb8bb2008-10-29 15:31:53 -0700974{
975 const struct macvlan_dev *vlan = netdev_priv(dev);
Jiri Pirko4bc71cb2011-09-03 03:34:30 +0000976
David Decotigny85f95812016-02-24 10:58:04 -0800977 return __ethtool_get_link_ksettings(vlan->lowerdev, cmd);
Stephen Hemminger9edb8bb2008-10-29 15:31:53 -0700978}
979
Vlad Yasevich2be5c762013-06-25 16:04:21 -0400980static netdev_features_t macvlan_fix_features(struct net_device *dev,
981 netdev_features_t features)
982{
983 struct macvlan_dev *vlan = netdev_priv(dev);
Michal Kubeček62dbe832014-12-05 17:05:49 +0100984 netdev_features_t lowerdev_features = vlan->lowerdev->features;
Florian Westphal797f87f2013-12-26 12:17:00 +0100985 netdev_features_t mask;
Vlad Yasevich2be5c762013-06-25 16:04:21 -0400986
Florian Westphal797f87f2013-12-26 12:17:00 +0100987 features |= NETIF_F_ALL_FOR_ALL;
988 features &= (vlan->set_features | ~MACVLAN_FEATURES);
989 mask = features;
990
Michal Kubeček62dbe832014-12-05 17:05:49 +0100991 lowerdev_features &= (features | ~NETIF_F_LRO);
992 features = netdev_increment_features(lowerdev_features, features, mask);
Vlad Yasevich8b4703e2014-03-03 15:33:53 -0500993 features |= ALWAYS_ON_FEATURES;
Francesco Ruggeri0d0162e2014-09-17 10:40:44 -0700994 features &= ~NETIF_F_NETNS_LOCAL;
Florian Westphal797f87f2013-12-26 12:17:00 +0100995
996 return features;
Vlad Yasevich2be5c762013-06-25 16:04:21 -0400997}
998
dingtianhong688cea82014-05-30 16:00:56 +0800999#ifdef CONFIG_NET_POLL_CONTROLLER
1000static void macvlan_dev_poll_controller(struct net_device *dev)
1001{
1002 return;
1003}
1004
1005static int macvlan_dev_netpoll_setup(struct net_device *dev, struct netpoll_info *npinfo)
1006{
1007 struct macvlan_dev *vlan = netdev_priv(dev);
1008 struct net_device *real_dev = vlan->lowerdev;
1009 struct netpoll *netpoll;
1010 int err = 0;
1011
1012 netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL);
1013 err = -ENOMEM;
1014 if (!netpoll)
1015 goto out;
1016
1017 err = __netpoll_setup(netpoll, real_dev);
1018 if (err) {
1019 kfree(netpoll);
1020 goto out;
1021 }
1022
1023 vlan->netpoll = netpoll;
1024
1025out:
1026 return err;
1027}
1028
1029static void macvlan_dev_netpoll_cleanup(struct net_device *dev)
1030{
1031 struct macvlan_dev *vlan = netdev_priv(dev);
1032 struct netpoll *netpoll = vlan->netpoll;
1033
1034 if (!netpoll)
1035 return;
1036
1037 vlan->netpoll = NULL;
1038
1039 __netpoll_free_async(netpoll);
1040}
1041#endif /* CONFIG_NET_POLL_CONTROLLER */
1042
Nicolas Dichtelef5fa6b2015-04-02 17:07:05 +02001043static int macvlan_dev_get_iflink(const struct net_device *dev)
1044{
1045 struct macvlan_dev *vlan = netdev_priv(dev);
1046
1047 return vlan->lowerdev->ifindex;
1048}
1049
Patrick McHardyb863ceb2007-07-14 18:55:06 -07001050static const struct ethtool_ops macvlan_ethtool_ops = {
1051 .get_link = ethtool_op_get_link,
David Decotigny85f95812016-02-24 10:58:04 -08001052 .get_link_ksettings = macvlan_ethtool_get_link_ksettings,
Patrick McHardyb863ceb2007-07-14 18:55:06 -07001053 .get_drvinfo = macvlan_ethtool_get_drvinfo,
1054};
1055
Stephen Hemminger54a30c92008-11-19 21:51:06 -08001056static const struct net_device_ops macvlan_netdev_ops = {
1057 .ndo_init = macvlan_init,
Eric Dumazetfccaf712009-11-17 08:53:49 +00001058 .ndo_uninit = macvlan_uninit,
Stephen Hemminger54a30c92008-11-19 21:51:06 -08001059 .ndo_open = macvlan_open,
1060 .ndo_stop = macvlan_stop,
Stephen Hemminger00829822008-11-20 20:14:53 -08001061 .ndo_start_xmit = macvlan_start_xmit,
Stephen Hemminger54a30c92008-11-19 21:51:06 -08001062 .ndo_change_mtu = macvlan_change_mtu,
Vlad Yasevich2be5c762013-06-25 16:04:21 -04001063 .ndo_fix_features = macvlan_fix_features,
Stephen Hemminger54a30c92008-11-19 21:51:06 -08001064 .ndo_change_rx_flags = macvlan_change_rx_flags,
1065 .ndo_set_mac_address = macvlan_set_mac_address,
John Fastabenddf8ef8f2012-04-15 06:44:37 +00001066 .ndo_set_rx_mode = macvlan_set_mac_lists,
Eric Dumazetbc661542010-06-24 00:54:21 +00001067 .ndo_get_stats64 = macvlan_dev_get_stats64,
Stephen Hemminger54a30c92008-11-19 21:51:06 -08001068 .ndo_validate_addr = eth_validate_addr,
John Fastabend8d13e672011-06-06 04:27:16 +00001069 .ndo_vlan_rx_add_vid = macvlan_vlan_rx_add_vid,
1070 .ndo_vlan_rx_kill_vid = macvlan_vlan_rx_kill_vid,
John Fastabenddf8ef8f2012-04-15 06:44:37 +00001071 .ndo_fdb_add = macvlan_fdb_add,
1072 .ndo_fdb_del = macvlan_fdb_del,
1073 .ndo_fdb_dump = ndo_dflt_fdb_dump,
Vlad Yasevichc674ac32014-05-16 17:04:56 -04001074 .ndo_get_lock_subclass = macvlan_get_nest_level,
dingtianhong688cea82014-05-30 16:00:56 +08001075#ifdef CONFIG_NET_POLL_CONTROLLER
1076 .ndo_poll_controller = macvlan_dev_poll_controller,
1077 .ndo_netpoll_setup = macvlan_dev_netpoll_setup,
1078 .ndo_netpoll_cleanup = macvlan_dev_netpoll_cleanup,
1079#endif
Nicolas Dichtelef5fa6b2015-04-02 17:07:05 +02001080 .ndo_get_iflink = macvlan_dev_get_iflink,
Toshiaki Makitaf56e67b2015-07-31 15:03:24 +09001081 .ndo_features_check = passthru_features_check,
Stephen Hemminger54a30c92008-11-19 21:51:06 -08001082};
1083
Herbert Xu8a357472010-07-21 21:44:31 +00001084void macvlan_common_setup(struct net_device *dev)
Patrick McHardyb863ceb2007-07-14 18:55:06 -07001085{
1086 ether_setup(dev);
1087
Eric Dumazet02875872014-10-05 18:38:35 -07001088 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
1089 netif_keep_dst(dev);
Vlad Yasevich87ab7f62013-03-07 10:21:48 +00001090 dev->priv_flags |= IFF_UNICAST_FLT;
Stephen Hemminger54a30c92008-11-19 21:51:06 -08001091 dev->netdev_ops = &macvlan_netdev_ops;
Patrick McHardyb863ceb2007-07-14 18:55:06 -07001092 dev->destructor = free_netdev;
Lutz Jaenicke71740122013-08-28 13:34:31 +02001093 dev->header_ops = &macvlan_hard_header_ops;
Patrick McHardyb863ceb2007-07-14 18:55:06 -07001094 dev->ethtool_ops = &macvlan_ethtool_ops;
Herbert Xu8a357472010-07-21 21:44:31 +00001095}
1096EXPORT_SYMBOL_GPL(macvlan_common_setup);
1097
1098static void macvlan_setup(struct net_device *dev)
1099{
1100 macvlan_common_setup(dev);
Zhang Shengju70092122016-02-14 14:10:39 +00001101 dev->priv_flags |= IFF_NO_QUEUE;
Patrick McHardyb863ceb2007-07-14 18:55:06 -07001102}
1103
1104static int macvlan_port_create(struct net_device *dev)
1105{
1106 struct macvlan_port *port;
1107 unsigned int i;
Jiri Pirkoab95bfe2010-06-01 21:52:08 +00001108 int err;
Patrick McHardyb863ceb2007-07-14 18:55:06 -07001109
1110 if (dev->type != ARPHRD_ETHER || dev->flags & IFF_LOOPBACK)
1111 return -EINVAL;
1112
Mahesh Bandeward6b00fe2014-12-06 15:53:46 -08001113 if (netif_is_ipvlan_port(dev))
1114 return -EBUSY;
1115
Patrick McHardyb863ceb2007-07-14 18:55:06 -07001116 port = kzalloc(sizeof(*port), GFP_KERNEL);
1117 if (port == NULL)
1118 return -ENOMEM;
1119
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +00001120 port->passthru = false;
Patrick McHardyb863ceb2007-07-14 18:55:06 -07001121 port->dev = dev;
1122 INIT_LIST_HEAD(&port->vlans);
1123 for (i = 0; i < MACVLAN_HASH_SIZE; i++)
1124 INIT_HLIST_HEAD(&port->vlan_hash[i]);
Michael Braun79cf79a2014-09-25 16:31:08 +02001125 for (i = 0; i < MACVLAN_HASH_SIZE; i++)
1126 INIT_HLIST_HEAD(&port->vlan_source_hash[i]);
Jiri Pirkoab95bfe2010-06-01 21:52:08 +00001127
Herbert Xu412ca152014-04-17 13:45:59 +08001128 skb_queue_head_init(&port->bc_queue);
1129 INIT_WORK(&port->bc_work, macvlan_process_broadcast);
1130
Jiri Pirkoa35e2c12010-06-15 03:27:57 +00001131 err = netdev_rx_handler_register(dev, macvlan_handle_frame, port);
1132 if (err)
Jiri Pirkoab95bfe2010-06-01 21:52:08 +00001133 kfree(port);
Eric Dumazetd9351562011-05-20 14:59:23 -04001134 else
1135 dev->priv_flags |= IFF_MACVLAN_PORT;
Jiri Pirkoab95bfe2010-06-01 21:52:08 +00001136 return err;
Patrick McHardyb863ceb2007-07-14 18:55:06 -07001137}
1138
1139static void macvlan_port_destroy(struct net_device *dev)
1140{
Eric Dumazete052f7e2013-03-30 10:08:44 +00001141 struct macvlan_port *port = macvlan_port_get_rtnl(dev);
Patrick McHardyb863ceb2007-07-14 18:55:06 -07001142
Jiri Pirkoa35e2c12010-06-15 03:27:57 +00001143 dev->priv_flags &= ~IFF_MACVLAN_PORT;
Jiri Pirkoab95bfe2010-06-01 21:52:08 +00001144 netdev_rx_handler_unregister(dev);
Eric Dumazetfe0ca732014-10-22 19:43:46 -07001145
1146 /* After this point, no packet can schedule bc_work anymore,
1147 * but we need to cancel it and purge left skbs if any.
1148 */
1149 cancel_work_sync(&port->bc_work);
1150 __skb_queue_purge(&port->bc_queue);
1151
Lai Jiangshan6e070ae2011-03-18 12:00:07 +08001152 kfree_rcu(port, rcu);
Patrick McHardyb863ceb2007-07-14 18:55:06 -07001153}
1154
Patrick McHardyb863ceb2007-07-14 18:55:06 -07001155static int macvlan_validate(struct nlattr *tb[], struct nlattr *data[])
1156{
1157 if (tb[IFLA_ADDRESS]) {
1158 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
1159 return -EINVAL;
1160 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
1161 return -EADDRNOTAVAIL;
1162 }
Arnd Bergmann27c0b1a2009-11-26 06:07:11 +00001163
Michael S. Tsirkin15127472013-08-05 18:25:54 +03001164 if (data && data[IFLA_MACVLAN_FLAGS] &&
1165 nla_get_u16(data[IFLA_MACVLAN_FLAGS]) & ~MACVLAN_FLAG_NOPROMISC)
1166 return -EINVAL;
1167
Arnd Bergmann27c0b1a2009-11-26 06:07:11 +00001168 if (data && data[IFLA_MACVLAN_MODE]) {
1169 switch (nla_get_u32(data[IFLA_MACVLAN_MODE])) {
1170 case MACVLAN_MODE_PRIVATE:
1171 case MACVLAN_MODE_VEPA:
1172 case MACVLAN_MODE_BRIDGE:
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +00001173 case MACVLAN_MODE_PASSTHRU:
Michael Braun79cf79a2014-09-25 16:31:08 +02001174 case MACVLAN_MODE_SOURCE:
Arnd Bergmann27c0b1a2009-11-26 06:07:11 +00001175 break;
1176 default:
1177 return -EINVAL;
1178 }
1179 }
Michael Braun79cf79a2014-09-25 16:31:08 +02001180
1181 if (data && data[IFLA_MACVLAN_MACADDR_MODE]) {
1182 switch (nla_get_u32(data[IFLA_MACVLAN_MACADDR_MODE])) {
1183 case MACVLAN_MACADDR_ADD:
1184 case MACVLAN_MACADDR_DEL:
1185 case MACVLAN_MACADDR_FLUSH:
1186 case MACVLAN_MACADDR_SET:
1187 break;
1188 default:
1189 return -EINVAL;
1190 }
1191 }
1192
1193 if (data && data[IFLA_MACVLAN_MACADDR]) {
1194 if (nla_len(data[IFLA_MACVLAN_MACADDR]) != ETH_ALEN)
1195 return -EINVAL;
1196
1197 if (!is_valid_ether_addr(nla_data(data[IFLA_MACVLAN_MACADDR])))
1198 return -EADDRNOTAVAIL;
1199 }
1200
1201 if (data && data[IFLA_MACVLAN_MACADDR_COUNT])
1202 return -EINVAL;
1203
1204 return 0;
1205}
1206
1207/**
1208 * reconfigure list of remote source mac address
1209 * (only for macvlan devices in source mode)
1210 * Note regarding alignment: all netlink data is aligned to 4 Byte, which
1211 * suffices for both ether_addr_copy and ether_addr_equal_64bits usage.
1212 */
1213static int macvlan_changelink_sources(struct macvlan_dev *vlan, u32 mode,
1214 struct nlattr *data[])
1215{
1216 char *addr = NULL;
1217 int ret, rem, len;
1218 struct nlattr *nla, *head;
1219 struct macvlan_source_entry *entry;
1220
1221 if (data[IFLA_MACVLAN_MACADDR])
1222 addr = nla_data(data[IFLA_MACVLAN_MACADDR]);
1223
1224 if (mode == MACVLAN_MACADDR_ADD) {
1225 if (!addr)
1226 return -EINVAL;
1227
1228 return macvlan_hash_add_source(vlan, addr);
1229
1230 } else if (mode == MACVLAN_MACADDR_DEL) {
1231 if (!addr)
1232 return -EINVAL;
1233
1234 entry = macvlan_hash_lookup_source(vlan, addr);
1235 if (entry) {
1236 macvlan_hash_del_source(entry);
1237 vlan->macaddr_count--;
1238 }
1239 } else if (mode == MACVLAN_MACADDR_FLUSH) {
1240 macvlan_flush_sources(vlan->port, vlan);
1241 } else if (mode == MACVLAN_MACADDR_SET) {
1242 macvlan_flush_sources(vlan->port, vlan);
1243
1244 if (addr) {
1245 ret = macvlan_hash_add_source(vlan, addr);
1246 if (ret)
1247 return ret;
1248 }
1249
1250 if (!data || !data[IFLA_MACVLAN_MACADDR_DATA])
1251 return 0;
1252
1253 head = nla_data(data[IFLA_MACVLAN_MACADDR_DATA]);
1254 len = nla_len(data[IFLA_MACVLAN_MACADDR_DATA]);
1255
1256 nla_for_each_attr(nla, head, len, rem) {
1257 if (nla_type(nla) != IFLA_MACVLAN_MACADDR ||
1258 nla_len(nla) != ETH_ALEN)
1259 continue;
1260
1261 addr = nla_data(nla);
1262 ret = macvlan_hash_add_source(vlan, addr);
1263 if (ret)
1264 return ret;
1265 }
1266 } else {
1267 return -EINVAL;
1268 }
1269
Patrick McHardyb863ceb2007-07-14 18:55:06 -07001270 return 0;
1271}
1272
Arnd Bergmannfc0663d2010-01-30 12:23:40 +00001273int macvlan_common_newlink(struct net *src_net, struct net_device *dev,
Vlad Yasevich2f6a1b62013-12-11 13:27:11 -05001274 struct nlattr *tb[], struct nlattr *data[])
Patrick McHardyb863ceb2007-07-14 18:55:06 -07001275{
1276 struct macvlan_dev *vlan = netdev_priv(dev);
1277 struct macvlan_port *port;
1278 struct net_device *lowerdev;
1279 int err;
Michael Braun79cf79a2014-09-25 16:31:08 +02001280 int macmode;
Patrick McHardyb863ceb2007-07-14 18:55:06 -07001281
1282 if (!tb[IFLA_LINK])
1283 return -EINVAL;
1284
Eric W. Biederman81adee42009-11-08 00:53:51 -08001285 lowerdev = __dev_get_by_index(src_net, nla_get_u32(tb[IFLA_LINK]));
Patrick McHardyb863ceb2007-07-14 18:55:06 -07001286 if (lowerdev == NULL)
1287 return -ENODEV;
1288
Kevin Wallaced70f2cf2013-12-03 02:55:22 -08001289 /* When creating macvlans or macvtaps on top of other macvlans - use
Eric Biedermanb0832a22009-03-13 13:15:37 -07001290 * the real device as the lowerdev.
Patrick McHardya6ca5f12008-01-10 22:39:28 -08001291 */
Kevin Wallaced70f2cf2013-12-03 02:55:22 -08001292 if (netif_is_macvlan(lowerdev))
1293 lowerdev = macvlan_dev_real_dev(lowerdev);
Patrick McHardya6ca5f12008-01-10 22:39:28 -08001294
Patrick McHardyb863ceb2007-07-14 18:55:06 -07001295 if (!tb[IFLA_MTU])
1296 dev->mtu = lowerdev->mtu;
1297 else if (dev->mtu > lowerdev->mtu)
1298 return -EINVAL;
1299
1300 if (!tb[IFLA_ADDRESS])
Danny Kukawka7ce5d222012-02-15 06:45:40 +00001301 eth_hw_addr_random(dev);
Patrick McHardyb863ceb2007-07-14 18:55:06 -07001302
Jiri Pirkoa35e2c12010-06-15 03:27:57 +00001303 if (!macvlan_port_exists(lowerdev)) {
Patrick McHardyb863ceb2007-07-14 18:55:06 -07001304 err = macvlan_port_create(lowerdev);
1305 if (err < 0)
1306 return err;
1307 }
Eric Dumazete052f7e2013-03-30 10:08:44 +00001308 port = macvlan_port_get_rtnl(lowerdev);
Patrick McHardyb863ceb2007-07-14 18:55:06 -07001309
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +00001310 /* Only 1 macvlan device can be created in passthru mode */
1311 if (port->passthru)
1312 return -EINVAL;
1313
Patrick McHardyb863ceb2007-07-14 18:55:06 -07001314 vlan->lowerdev = lowerdev;
1315 vlan->dev = dev;
1316 vlan->port = port;
Vlad Yasevich2be5c762013-06-25 16:04:21 -04001317 vlan->set_features = MACVLAN_FEATURES;
Vlad Yasevichc674ac32014-05-16 17:04:56 -04001318 vlan->nest_level = dev_get_nest_level(lowerdev, netif_is_macvlan) + 1;
Patrick McHardyb863ceb2007-07-14 18:55:06 -07001319
Arnd Bergmann27c0b1a2009-11-26 06:07:11 +00001320 vlan->mode = MACVLAN_MODE_VEPA;
1321 if (data && data[IFLA_MACVLAN_MODE])
1322 vlan->mode = nla_get_u32(data[IFLA_MACVLAN_MODE]);
1323
John Fastabenddf8ef8f2012-04-15 06:44:37 +00001324 if (data && data[IFLA_MACVLAN_FLAGS])
1325 vlan->flags = nla_get_u16(data[IFLA_MACVLAN_FLAGS]);
1326
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +00001327 if (vlan->mode == MACVLAN_MODE_PASSTHRU) {
David S. Miller5e3c5162014-08-14 14:32:49 -07001328 if (port->count)
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +00001329 return -EINVAL;
1330 port->passthru = true;
Bjørn Mork8b986042013-08-30 18:08:47 +02001331 eth_hw_addr_inherit(dev, lowerdev);
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +00001332 }
1333
Michael Braun79cf79a2014-09-25 16:31:08 +02001334 if (data && data[IFLA_MACVLAN_MACADDR_MODE]) {
1335 if (vlan->mode != MACVLAN_MODE_SOURCE)
1336 return -EINVAL;
1337 macmode = nla_get_u32(data[IFLA_MACVLAN_MACADDR_MODE]);
1338 err = macvlan_changelink_sources(vlan, macmode, data);
1339 if (err)
1340 return err;
1341 }
1342
John Fastabend47d4ab92013-10-21 14:28:02 -07001343 err = register_netdevice(dev);
1344 if (err < 0)
Francesco Ruggeri30837962016-04-23 15:03:32 -07001345 return err;
John Fastabend47d4ab92013-10-21 14:28:02 -07001346
John Fastabenda6cc0cf2013-11-06 09:54:46 -08001347 dev->priv_flags |= IFF_MACVLAN;
Jiri Pirko7cd43db2013-01-03 22:48:50 +00001348 err = netdev_upper_dev_link(lowerdev, dev);
1349 if (err)
Cong Wangda377052014-02-11 15:51:29 -08001350 goto unregister_netdev;
Patrick McHardyb863ceb2007-07-14 18:55:06 -07001351
Jiri Pirko233c7df2013-05-09 04:23:40 +00001352 list_add_tail_rcu(&vlan->list, &port->vlans);
Patrick Mullaneyfc4a7482009-12-03 15:59:22 -08001353 netif_stacked_transfer_operstate(lowerdev, dev);
Nikolay Aleksandrovde7d2442016-01-27 17:50:43 +01001354 linkwatch_fire_event(dev);
Jiri Pirkof16d3d52010-05-24 07:02:25 +00001355
Patrick McHardyb863ceb2007-07-14 18:55:06 -07001356 return 0;
Jiri Pirkof16d3d52010-05-24 07:02:25 +00001357
Cong Wangda377052014-02-11 15:51:29 -08001358unregister_netdev:
1359 unregister_netdevice(dev);
Jiri Pirkof16d3d52010-05-24 07:02:25 +00001360
1361 return err;
Patrick McHardyb863ceb2007-07-14 18:55:06 -07001362}
Arnd Bergmannfc0663d2010-01-30 12:23:40 +00001363EXPORT_SYMBOL_GPL(macvlan_common_newlink);
Patrick McHardyb863ceb2007-07-14 18:55:06 -07001364
Arnd Bergmannfc0663d2010-01-30 12:23:40 +00001365static int macvlan_newlink(struct net *src_net, struct net_device *dev,
1366 struct nlattr *tb[], struct nlattr *data[])
1367{
Vlad Yasevich2f6a1b62013-12-11 13:27:11 -05001368 return macvlan_common_newlink(src_net, dev, tb, data);
Arnd Bergmannfc0663d2010-01-30 12:23:40 +00001369}
1370
1371void macvlan_dellink(struct net_device *dev, struct list_head *head)
Patrick McHardyb863ceb2007-07-14 18:55:06 -07001372{
1373 struct macvlan_dev *vlan = netdev_priv(dev);
Patrick McHardyb863ceb2007-07-14 18:55:06 -07001374
Michael Braun79cf79a2014-09-25 16:31:08 +02001375 if (vlan->mode == MACVLAN_MODE_SOURCE)
1376 macvlan_flush_sources(vlan->port, vlan);
Jiri Pirko233c7df2013-05-09 04:23:40 +00001377 list_del_rcu(&vlan->list);
Eric Dumazet23289a32009-10-27 07:06:36 +00001378 unregister_netdevice_queue(dev, head);
Jiri Pirko7cd43db2013-01-03 22:48:50 +00001379 netdev_upper_dev_unlink(vlan->lowerdev, dev);
Patrick McHardyb863ceb2007-07-14 18:55:06 -07001380}
Arnd Bergmannfc0663d2010-01-30 12:23:40 +00001381EXPORT_SYMBOL_GPL(macvlan_dellink);
Patrick McHardyb863ceb2007-07-14 18:55:06 -07001382
Arnd Bergmann27c0b1a2009-11-26 06:07:11 +00001383static int macvlan_changelink(struct net_device *dev,
1384 struct nlattr *tb[], struct nlattr *data[])
1385{
1386 struct macvlan_dev *vlan = netdev_priv(dev);
Michael S. Tsirkin266e8342013-08-01 13:43:19 +03001387 enum macvlan_mode mode;
1388 bool set_mode = false;
Michael Braun79cf79a2014-09-25 16:31:08 +02001389 enum macvlan_macaddr_mode macmode;
1390 int ret;
Michael S. Tsirkin266e8342013-08-01 13:43:19 +03001391
1392 /* Validate mode, but don't set yet: setting flags may fail. */
1393 if (data && data[IFLA_MACVLAN_MODE]) {
1394 set_mode = true;
1395 mode = nla_get_u32(data[IFLA_MACVLAN_MODE]);
1396 /* Passthrough mode can't be set or cleared dynamically */
1397 if ((mode == MACVLAN_MODE_PASSTHRU) !=
1398 (vlan->mode == MACVLAN_MODE_PASSTHRU))
1399 return -EINVAL;
Michael Braun79cf79a2014-09-25 16:31:08 +02001400 if (vlan->mode == MACVLAN_MODE_SOURCE &&
1401 vlan->mode != mode)
1402 macvlan_flush_sources(vlan->port, vlan);
Michael S. Tsirkin266e8342013-08-01 13:43:19 +03001403 }
Michael S. Tsirkin99ffc3e2013-06-13 10:07:29 +03001404
John Fastabenddf8ef8f2012-04-15 06:44:37 +00001405 if (data && data[IFLA_MACVLAN_FLAGS]) {
1406 __u16 flags = nla_get_u16(data[IFLA_MACVLAN_FLAGS]);
1407 bool promisc = (flags ^ vlan->flags) & MACVLAN_FLAG_NOPROMISC;
Michael S. Tsirkin99ffc3e2013-06-13 10:07:29 +03001408 if (vlan->port->passthru && promisc) {
1409 int err;
John Fastabenddf8ef8f2012-04-15 06:44:37 +00001410
Michael S. Tsirkin99ffc3e2013-06-13 10:07:29 +03001411 if (flags & MACVLAN_FLAG_NOPROMISC)
1412 err = dev_set_promiscuity(vlan->lowerdev, -1);
1413 else
1414 err = dev_set_promiscuity(vlan->lowerdev, 1);
1415 if (err < 0)
1416 return err;
1417 }
John Fastabenddf8ef8f2012-04-15 06:44:37 +00001418 vlan->flags = flags;
1419 }
Michael S. Tsirkin266e8342013-08-01 13:43:19 +03001420 if (set_mode)
1421 vlan->mode = mode;
Michael Braun79cf79a2014-09-25 16:31:08 +02001422 if (data && data[IFLA_MACVLAN_MACADDR_MODE]) {
1423 if (vlan->mode != MACVLAN_MODE_SOURCE)
1424 return -EINVAL;
1425 macmode = nla_get_u32(data[IFLA_MACVLAN_MACADDR_MODE]);
1426 ret = macvlan_changelink_sources(vlan, macmode, data);
1427 if (ret)
1428 return ret;
1429 }
Arnd Bergmann27c0b1a2009-11-26 06:07:11 +00001430 return 0;
1431}
1432
Michael Braun79cf79a2014-09-25 16:31:08 +02001433static size_t macvlan_get_size_mac(const struct macvlan_dev *vlan)
1434{
1435 if (vlan->macaddr_count == 0)
1436 return 0;
1437 return nla_total_size(0) /* IFLA_MACVLAN_MACADDR_DATA */
1438 + vlan->macaddr_count * nla_total_size(sizeof(u8) * ETH_ALEN);
1439}
1440
Arnd Bergmann27c0b1a2009-11-26 06:07:11 +00001441static size_t macvlan_get_size(const struct net_device *dev)
1442{
Michael Braun79cf79a2014-09-25 16:31:08 +02001443 struct macvlan_dev *vlan = netdev_priv(dev);
1444
Eric Dumazet01fe9442013-01-17 13:30:49 -08001445 return (0
1446 + nla_total_size(4) /* IFLA_MACVLAN_MODE */
1447 + nla_total_size(2) /* IFLA_MACVLAN_FLAGS */
Michael Braun79cf79a2014-09-25 16:31:08 +02001448 + nla_total_size(4) /* IFLA_MACVLAN_MACADDR_COUNT */
1449 + macvlan_get_size_mac(vlan) /* IFLA_MACVLAN_MACADDR */
Eric Dumazet01fe9442013-01-17 13:30:49 -08001450 );
Arnd Bergmann27c0b1a2009-11-26 06:07:11 +00001451}
1452
Michael Braun79cf79a2014-09-25 16:31:08 +02001453static int macvlan_fill_info_macaddr(struct sk_buff *skb,
1454 const struct macvlan_dev *vlan,
1455 const int i)
1456{
1457 struct hlist_head *h = &vlan->port->vlan_source_hash[i];
1458 struct macvlan_source_entry *entry;
1459
1460 hlist_for_each_entry_rcu(entry, h, hlist) {
1461 if (entry->vlan != vlan)
1462 continue;
1463 if (nla_put(skb, IFLA_MACVLAN_MACADDR, ETH_ALEN, entry->addr))
1464 return 1;
1465 }
1466 return 0;
1467}
1468
Arnd Bergmann27c0b1a2009-11-26 06:07:11 +00001469static int macvlan_fill_info(struct sk_buff *skb,
1470 const struct net_device *dev)
1471{
1472 struct macvlan_dev *vlan = netdev_priv(dev);
Michael Braun79cf79a2014-09-25 16:31:08 +02001473 int i;
1474 struct nlattr *nest;
Arnd Bergmann27c0b1a2009-11-26 06:07:11 +00001475
David S. Milleread9a762012-04-01 20:23:06 -04001476 if (nla_put_u32(skb, IFLA_MACVLAN_MODE, vlan->mode))
1477 goto nla_put_failure;
John Fastabenddf8ef8f2012-04-15 06:44:37 +00001478 if (nla_put_u16(skb, IFLA_MACVLAN_FLAGS, vlan->flags))
1479 goto nla_put_failure;
Michael Braun79cf79a2014-09-25 16:31:08 +02001480 if (nla_put_u32(skb, IFLA_MACVLAN_MACADDR_COUNT, vlan->macaddr_count))
1481 goto nla_put_failure;
1482 if (vlan->macaddr_count > 0) {
1483 nest = nla_nest_start(skb, IFLA_MACVLAN_MACADDR_DATA);
1484 if (nest == NULL)
1485 goto nla_put_failure;
1486
1487 for (i = 0; i < MACVLAN_HASH_SIZE; i++) {
1488 if (macvlan_fill_info_macaddr(skb, vlan, i))
1489 goto nla_put_failure;
1490 }
1491 nla_nest_end(skb, nest);
1492 }
Arnd Bergmann27c0b1a2009-11-26 06:07:11 +00001493 return 0;
1494
1495nla_put_failure:
1496 return -EMSGSIZE;
1497}
1498
1499static const struct nla_policy macvlan_policy[IFLA_MACVLAN_MAX + 1] = {
John Fastabenddf8ef8f2012-04-15 06:44:37 +00001500 [IFLA_MACVLAN_MODE] = { .type = NLA_U32 },
1501 [IFLA_MACVLAN_FLAGS] = { .type = NLA_U16 },
Michael Braun79cf79a2014-09-25 16:31:08 +02001502 [IFLA_MACVLAN_MACADDR_MODE] = { .type = NLA_U32 },
1503 [IFLA_MACVLAN_MACADDR] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
1504 [IFLA_MACVLAN_MACADDR_DATA] = { .type = NLA_NESTED },
1505 [IFLA_MACVLAN_MACADDR_COUNT] = { .type = NLA_U32 },
Arnd Bergmann27c0b1a2009-11-26 06:07:11 +00001506};
1507
Arnd Bergmannfc0663d2010-01-30 12:23:40 +00001508int macvlan_link_register(struct rtnl_link_ops *ops)
1509{
1510 /* common fields */
1511 ops->priv_size = sizeof(struct macvlan_dev);
Arnd Bergmannfc0663d2010-01-30 12:23:40 +00001512 ops->validate = macvlan_validate;
1513 ops->maxtype = IFLA_MACVLAN_MAX;
1514 ops->policy = macvlan_policy;
1515 ops->changelink = macvlan_changelink;
1516 ops->get_size = macvlan_get_size;
1517 ops->fill_info = macvlan_fill_info;
1518
1519 return rtnl_link_register(ops);
1520};
1521EXPORT_SYMBOL_GPL(macvlan_link_register);
1522
Nicolas Dichteleaca4002015-01-20 15:15:45 +01001523static struct net *macvlan_get_link_net(const struct net_device *dev)
1524{
1525 return dev_net(macvlan_dev_real_dev(dev));
1526}
1527
Arnd Bergmannfc0663d2010-01-30 12:23:40 +00001528static struct rtnl_link_ops macvlan_link_ops = {
Patrick McHardyb863ceb2007-07-14 18:55:06 -07001529 .kind = "macvlan",
Herbert Xu8a357472010-07-21 21:44:31 +00001530 .setup = macvlan_setup,
Patrick McHardyb863ceb2007-07-14 18:55:06 -07001531 .newlink = macvlan_newlink,
1532 .dellink = macvlan_dellink,
Nicolas Dichteleaca4002015-01-20 15:15:45 +01001533 .get_link_net = macvlan_get_link_net,
Patrick McHardyb863ceb2007-07-14 18:55:06 -07001534};
1535
1536static int macvlan_device_event(struct notifier_block *unused,
1537 unsigned long event, void *ptr)
1538{
Jiri Pirko351638e2013-05-28 01:30:21 +00001539 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
Patrick McHardyb863ceb2007-07-14 18:55:06 -07001540 struct macvlan_dev *vlan, *next;
1541 struct macvlan_port *port;
Eric Dumazet226bd342011-05-08 23:17:57 +00001542 LIST_HEAD(list_kill);
Patrick McHardyb863ceb2007-07-14 18:55:06 -07001543
Jiri Pirkoa35e2c12010-06-15 03:27:57 +00001544 if (!macvlan_port_exists(dev))
Patrick McHardyb863ceb2007-07-14 18:55:06 -07001545 return NOTIFY_DONE;
1546
Eric Dumazete052f7e2013-03-30 10:08:44 +00001547 port = macvlan_port_get_rtnl(dev);
Jiri Pirkoa35e2c12010-06-15 03:27:57 +00001548
Patrick McHardyb863ceb2007-07-14 18:55:06 -07001549 switch (event) {
Nikolay Aleksandrovde7d2442016-01-27 17:50:43 +01001550 case NETDEV_UP:
Patrick McHardyb863ceb2007-07-14 18:55:06 -07001551 case NETDEV_CHANGE:
1552 list_for_each_entry(vlan, &port->vlans, list)
Patrick Mullaneyfc4a7482009-12-03 15:59:22 -08001553 netif_stacked_transfer_operstate(vlan->lowerdev,
1554 vlan->dev);
Patrick McHardyb863ceb2007-07-14 18:55:06 -07001555 break;
1556 case NETDEV_FEAT_CHANGE:
1557 list_for_each_entry(vlan, &port->vlans, list) {
Patrick McHardy8c2acc52009-11-23 14:18:53 -08001558 vlan->dev->gso_max_size = dev->gso_max_size;
Eric Dumazetf6773c52016-03-16 21:59:49 -07001559 vlan->dev->gso_max_segs = dev->gso_max_segs;
Florian Westphal797f87f2013-12-26 12:17:00 +01001560 netdev_update_features(vlan->dev);
Patrick McHardyb863ceb2007-07-14 18:55:06 -07001561 }
1562 break;
dingtianhong3763e7e2014-05-13 14:39:27 +08001563 case NETDEV_CHANGEMTU:
1564 list_for_each_entry(vlan, &port->vlans, list) {
1565 if (vlan->dev->mtu <= dev->mtu)
1566 continue;
1567 dev_set_mtu(vlan->dev, dev->mtu);
1568 }
1569 break;
dingtianhonge289fd22014-05-30 14:32:49 +08001570 case NETDEV_CHANGEADDR:
1571 if (!port->passthru)
1572 return NOTIFY_DONE;
1573
1574 vlan = list_first_entry_or_null(&port->vlans,
1575 struct macvlan_dev,
1576 list);
1577
1578 if (macvlan_sync_address(vlan->dev, dev->dev_addr))
1579 return NOTIFY_BAD;
1580
1581 break;
Patrick McHardyb863ceb2007-07-14 18:55:06 -07001582 case NETDEV_UNREGISTER:
David Lamparter3b27e102010-09-17 03:22:19 +00001583 /* twiddle thumbs on netns device moves */
1584 if (dev->reg_state != NETREG_UNREGISTERING)
1585 break;
1586
Patrick McHardyb863ceb2007-07-14 18:55:06 -07001587 list_for_each_entry_safe(vlan, next, &port->vlans, list)
Eric Dumazet226bd342011-05-08 23:17:57 +00001588 vlan->dev->rtnl_link_ops->dellink(vlan->dev, &list_kill);
1589 unregister_netdevice_many(&list_kill);
Patrick McHardyb863ceb2007-07-14 18:55:06 -07001590 break;
Jiri Pirko1c01fe12010-03-10 10:30:19 +00001591 case NETDEV_PRE_TYPE_CHANGE:
1592 /* Forbid underlaying device to change its type. */
1593 return NOTIFY_BAD;
Vlad Yasevich4c991252014-06-04 16:23:37 -04001594
1595 case NETDEV_NOTIFY_PEERS:
1596 case NETDEV_BONDING_FAILOVER:
1597 case NETDEV_RESEND_IGMP:
1598 /* Propagate to all vlans */
1599 list_for_each_entry(vlan, &port->vlans, list)
1600 call_netdevice_notifiers(event, vlan->dev);
Patrick McHardyb863ceb2007-07-14 18:55:06 -07001601 }
1602 return NOTIFY_DONE;
1603}
1604
1605static struct notifier_block macvlan_notifier_block __read_mostly = {
1606 .notifier_call = macvlan_device_event,
1607};
1608
1609static int __init macvlan_init_module(void)
1610{
1611 int err;
1612
1613 register_netdevice_notifier(&macvlan_notifier_block);
Patrick McHardyb863ceb2007-07-14 18:55:06 -07001614
Arnd Bergmannfc0663d2010-01-30 12:23:40 +00001615 err = macvlan_link_register(&macvlan_link_ops);
Patrick McHardyb863ceb2007-07-14 18:55:06 -07001616 if (err < 0)
1617 goto err1;
1618 return 0;
1619err1:
Patrick McHardyb863ceb2007-07-14 18:55:06 -07001620 unregister_netdevice_notifier(&macvlan_notifier_block);
1621 return err;
1622}
1623
1624static void __exit macvlan_cleanup_module(void)
1625{
1626 rtnl_link_unregister(&macvlan_link_ops);
Patrick McHardyb863ceb2007-07-14 18:55:06 -07001627 unregister_netdevice_notifier(&macvlan_notifier_block);
1628}
1629
1630module_init(macvlan_init_module);
1631module_exit(macvlan_cleanup_module);
1632
1633MODULE_LICENSE("GPL");
1634MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>");
1635MODULE_DESCRIPTION("Driver for MAC address based VLANs");
1636MODULE_ALIAS_RTNL_LINK("macvlan");