blob: 1c502bb0c916ff549ab10400af5d24b7f61c4866 [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>
Patrick McHardyb863ceb2007-07-14 18:55:06 -070033#include <net/rtnetlink.h>
Arnd Bergmann618e1b72009-11-26 06:07:10 +000034#include <net/xfrm.h>
Patrick McHardyb863ceb2007-07-14 18:55:06 -070035
36#define MACVLAN_HASH_SIZE (1 << BITS_PER_BYTE)
37
38struct macvlan_port {
39 struct net_device *dev;
40 struct hlist_head vlan_hash[MACVLAN_HASH_SIZE];
41 struct list_head vlans;
Jiri Pirko8b37ef02010-06-07 01:36:29 +000042 struct rcu_head rcu;
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +000043 bool passthru;
Eric W. Biedermand5cd92442011-03-21 18:22:22 -070044 int count;
Patrick McHardyb863ceb2007-07-14 18:55:06 -070045};
46
Eric W. Biedermand5cd92442011-03-21 18:22:22 -070047static void macvlan_port_destroy(struct net_device *dev);
48
Eric Dumazete052f7e2013-03-30 10:08:44 +000049static struct macvlan_port *macvlan_port_get_rcu(const struct net_device *dev)
50{
51 return rcu_dereference(dev->rx_handler_data);
52}
53
54static struct macvlan_port *macvlan_port_get_rtnl(const struct net_device *dev)
55{
56 return rtnl_dereference(dev->rx_handler_data);
57}
58
Jiri Pirkoa35e2c12010-06-15 03:27:57 +000059#define macvlan_port_exists(dev) (dev->priv_flags & IFF_MACVLAN_PORT)
60
Patrick McHardyb863ceb2007-07-14 18:55:06 -070061static struct macvlan_dev *macvlan_hash_lookup(const struct macvlan_port *port,
62 const unsigned char *addr)
63{
64 struct macvlan_dev *vlan;
Patrick McHardyb863ceb2007-07-14 18:55:06 -070065
Sasha Levinb67bfe02013-02-27 17:06:00 -080066 hlist_for_each_entry_rcu(vlan, &port->vlan_hash[addr[5]], hlist) {
Joe Perchesa6700db2012-05-09 17:04:04 +000067 if (ether_addr_equal_64bits(vlan->dev->dev_addr, addr))
Patrick McHardyb863ceb2007-07-14 18:55:06 -070068 return vlan;
69 }
70 return NULL;
71}
72
Eric Biedermanf9ac30f2009-03-13 13:16:13 -070073static void macvlan_hash_add(struct macvlan_dev *vlan)
74{
75 struct macvlan_port *port = vlan->port;
76 const unsigned char *addr = vlan->dev->dev_addr;
77
78 hlist_add_head_rcu(&vlan->hlist, &port->vlan_hash[addr[5]]);
79}
80
Eric Dumazet449f4542011-05-19 12:24:16 +000081static void macvlan_hash_del(struct macvlan_dev *vlan, bool sync)
Eric Biedermanf9ac30f2009-03-13 13:16:13 -070082{
83 hlist_del_rcu(&vlan->hlist);
Eric Dumazet449f4542011-05-19 12:24:16 +000084 if (sync)
85 synchronize_rcu();
Eric Biedermanf9ac30f2009-03-13 13:16:13 -070086}
87
88static void macvlan_hash_change_addr(struct macvlan_dev *vlan,
89 const unsigned char *addr)
90{
Eric Dumazet449f4542011-05-19 12:24:16 +000091 macvlan_hash_del(vlan, true);
Eric Biedermanf9ac30f2009-03-13 13:16:13 -070092 /* Now that we are unhashed it is safe to change the device
93 * address without confusing packet delivery.
94 */
95 memcpy(vlan->dev->dev_addr, addr, ETH_ALEN);
96 macvlan_hash_add(vlan);
97}
98
99static int macvlan_addr_busy(const struct macvlan_port *port,
100 const unsigned char *addr)
101{
102 /* Test to see if the specified multicast address is
103 * currently in use by the underlying device or
104 * another macvlan.
105 */
Joe Perchesa6700db2012-05-09 17:04:04 +0000106 if (ether_addr_equal_64bits(port->dev->dev_addr, addr))
Eric Biedermanf9ac30f2009-03-13 13:16:13 -0700107 return 1;
108
109 if (macvlan_hash_lookup(port, addr))
110 return 1;
111
112 return 0;
113}
114
Arnd Bergmanna1e514c2009-11-26 06:07:09 +0000115
Arnd Bergmannfc0663d2010-01-30 12:23:40 +0000116static int macvlan_broadcast_one(struct sk_buff *skb,
117 const struct macvlan_dev *vlan,
Arnd Bergmann618e1b72009-11-26 06:07:10 +0000118 const struct ethhdr *eth, bool local)
Arnd Bergmanna1e514c2009-11-26 06:07:09 +0000119{
Arnd Bergmannfc0663d2010-01-30 12:23:40 +0000120 struct net_device *dev = vlan->dev;
Arnd Bergmanna1e514c2009-11-26 06:07:09 +0000121 if (!skb)
122 return NET_RX_DROP;
123
Arnd Bergmann618e1b72009-11-26 06:07:10 +0000124 if (local)
Arnd Bergmannfc0663d2010-01-30 12:23:40 +0000125 return vlan->forward(dev, skb);
Arnd Bergmann618e1b72009-11-26 06:07:10 +0000126
Arnd Bergmanna1e514c2009-11-26 06:07:09 +0000127 skb->dev = dev;
Joe Perchesa6700db2012-05-09 17:04:04 +0000128 if (ether_addr_equal_64bits(eth->h_dest, dev->broadcast))
Arnd Bergmanna1e514c2009-11-26 06:07:09 +0000129 skb->pkt_type = PACKET_BROADCAST;
130 else
131 skb->pkt_type = PACKET_MULTICAST;
132
Arnd Bergmannfc0663d2010-01-30 12:23:40 +0000133 return vlan->receive(skb);
Arnd Bergmanna1e514c2009-11-26 06:07:09 +0000134}
135
Eric Dumazet3807ff52013-02-07 16:41:02 +0000136static u32 macvlan_hash_mix(const struct macvlan_dev *vlan)
137{
138 return (u32)(((unsigned long)vlan) >> L1_CACHE_SHIFT);
139}
140
141
142static unsigned int mc_hash(const struct macvlan_dev *vlan,
143 const unsigned char *addr)
Eric Dumazetcd431e72013-02-05 20:22:50 +0000144{
145 u32 val = __get_unaligned_cpu32(addr + 2);
146
Eric Dumazet3807ff52013-02-07 16:41:02 +0000147 val ^= macvlan_hash_mix(vlan);
Eric Dumazetcd431e72013-02-05 20:22:50 +0000148 return hash_32(val, MACVLAN_MC_FILTER_BITS);
149}
150
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700151static void macvlan_broadcast(struct sk_buff *skb,
Arnd Bergmann618e1b72009-11-26 06:07:10 +0000152 const struct macvlan_port *port,
153 struct net_device *src,
154 enum macvlan_mode mode)
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700155{
156 const struct ethhdr *eth = eth_hdr(skb);
157 const struct macvlan_dev *vlan;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700158 struct sk_buff *nskb;
159 unsigned int i;
Arnd Bergmanna1e514c2009-11-26 06:07:09 +0000160 int err;
Eric Dumazet3807ff52013-02-07 16:41:02 +0000161 unsigned int hash;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700162
Patrick McHardyefbbced2008-11-26 15:30:48 -0800163 if (skb->protocol == htons(ETH_P_PAUSE))
164 return;
165
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700166 for (i = 0; i < MACVLAN_HASH_SIZE; i++) {
Sasha Levinb67bfe02013-02-27 17:06:00 -0800167 hlist_for_each_entry_rcu(vlan, &port->vlan_hash[i], hlist) {
Arnd Bergmann618e1b72009-11-26 06:07:10 +0000168 if (vlan->dev == src || !(vlan->mode & mode))
169 continue;
170
Eric Dumazet3807ff52013-02-07 16:41:02 +0000171 hash = mc_hash(vlan, eth->h_dest);
Eric Dumazetcd431e72013-02-05 20:22:50 +0000172 if (!test_bit(hash, vlan->mc_filter))
173 continue;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700174 nskb = skb_clone(skb, GFP_ATOMIC);
Arnd Bergmannfc0663d2010-01-30 12:23:40 +0000175 err = macvlan_broadcast_one(nskb, vlan, eth,
Arnd Bergmann618e1b72009-11-26 06:07:10 +0000176 mode == MACVLAN_MODE_BRIDGE);
Arnd Bergmanna1e514c2009-11-26 06:07:09 +0000177 macvlan_count_rx(vlan, skb->len + ETH_HLEN,
178 err == NET_RX_SUCCESS, 1);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700179 }
180 }
181}
182
183/* called under rcu_read_lock() from netif_receive_skb */
Jiri Pirko8a4eb572011-03-12 03:14:39 +0000184static rx_handler_result_t macvlan_handle_frame(struct sk_buff **pskb)
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700185{
Jiri Pirkoab95bfe2010-06-01 21:52:08 +0000186 struct macvlan_port *port;
Jiri Pirko8a4eb572011-03-12 03:14:39 +0000187 struct sk_buff *skb = *pskb;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700188 const struct ethhdr *eth = eth_hdr(skb);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700189 const struct macvlan_dev *vlan;
Arnd Bergmann618e1b72009-11-26 06:07:10 +0000190 const struct macvlan_dev *src;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700191 struct net_device *dev;
Sridhar Samudralaba018772010-07-27 09:10:07 +0000192 unsigned int len = 0;
193 int ret = NET_RX_DROP;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700194
Jiri Pirkoa35e2c12010-06-15 03:27:57 +0000195 port = macvlan_port_get_rcu(skb->dev);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700196 if (is_multicast_ether_addr(eth->h_dest)) {
Eric Dumazetbc416d92011-10-06 10:28:31 +0000197 skb = ip_check_defrag(skb, IP_DEFRAG_MACVLAN);
198 if (!skb)
199 return RX_HANDLER_CONSUMED;
Eric Dumazet4ec7ac12012-01-23 05:38:59 +0000200 eth = eth_hdr(skb);
Arnd Bergmann618e1b72009-11-26 06:07:10 +0000201 src = macvlan_hash_lookup(port, eth->h_source);
202 if (!src)
203 /* frame comes from an external address */
204 macvlan_broadcast(skb, port, NULL,
205 MACVLAN_MODE_PRIVATE |
206 MACVLAN_MODE_VEPA |
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +0000207 MACVLAN_MODE_PASSTHRU|
Arnd Bergmann618e1b72009-11-26 06:07:10 +0000208 MACVLAN_MODE_BRIDGE);
209 else if (src->mode == MACVLAN_MODE_VEPA)
210 /* flood to everyone except source */
211 macvlan_broadcast(skb, port, src->dev,
212 MACVLAN_MODE_VEPA |
213 MACVLAN_MODE_BRIDGE);
214 else if (src->mode == MACVLAN_MODE_BRIDGE)
215 /*
216 * flood only to VEPA ports, bridge ports
217 * already saw the frame on the way out.
218 */
219 macvlan_broadcast(skb, port, src->dev,
220 MACVLAN_MODE_VEPA);
stephen hemminger729e72a2011-11-02 12:11:53 +0000221 else {
222 /* forward to original port. */
223 vlan = src;
224 ret = macvlan_broadcast_one(skb, vlan, eth, 0);
225 goto out;
226 }
227
Jiri Pirko8a4eb572011-03-12 03:14:39 +0000228 return RX_HANDLER_PASS;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700229 }
230
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +0000231 if (port->passthru)
Jiri Pirko233c7df2013-05-09 04:23:40 +0000232 vlan = list_first_or_null_rcu(&port->vlans,
233 struct macvlan_dev, list);
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +0000234 else
235 vlan = macvlan_hash_lookup(port, eth->h_dest);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700236 if (vlan == NULL)
Jiri Pirko8a4eb572011-03-12 03:14:39 +0000237 return RX_HANDLER_PASS;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700238
239 dev = vlan->dev;
240 if (unlikely(!(dev->flags & IFF_UP))) {
241 kfree_skb(skb);
Jiri Pirko8a4eb572011-03-12 03:14:39 +0000242 return RX_HANDLER_CONSUMED;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700243 }
Arnd Bergmanna1e514c2009-11-26 06:07:09 +0000244 len = skb->len + ETH_HLEN;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700245 skb = skb_share_check(skb, GFP_ATOMIC);
Arnd Bergmanna1e514c2009-11-26 06:07:09 +0000246 if (!skb)
Sridhar Samudralaba018772010-07-27 09:10:07 +0000247 goto out;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700248
249 skb->dev = dev;
250 skb->pkt_type = PACKET_HOST;
251
Sridhar Samudralaba018772010-07-27 09:10:07 +0000252 ret = vlan->receive(skb);
253
254out:
255 macvlan_count_rx(vlan, len, ret == NET_RX_SUCCESS, 0);
Jiri Pirko8a4eb572011-03-12 03:14:39 +0000256 return RX_HANDLER_CONSUMED;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700257}
258
Arnd Bergmann618e1b72009-11-26 06:07:10 +0000259static int macvlan_queue_xmit(struct sk_buff *skb, struct net_device *dev)
260{
261 const struct macvlan_dev *vlan = netdev_priv(dev);
262 const struct macvlan_port *port = vlan->port;
263 const struct macvlan_dev *dest;
Daniel Lezcano12a28562011-03-14 06:08:07 +0000264 __u8 ip_summed = skb->ip_summed;
Arnd Bergmann618e1b72009-11-26 06:07:10 +0000265
266 if (vlan->mode == MACVLAN_MODE_BRIDGE) {
267 const struct ethhdr *eth = (void *)skb->data;
Daniel Lezcano12a28562011-03-14 06:08:07 +0000268 skb->ip_summed = CHECKSUM_UNNECESSARY;
Arnd Bergmann618e1b72009-11-26 06:07:10 +0000269
270 /* send to other bridge ports directly */
271 if (is_multicast_ether_addr(eth->h_dest)) {
272 macvlan_broadcast(skb, port, dev, MACVLAN_MODE_BRIDGE);
273 goto xmit_world;
274 }
275
276 dest = macvlan_hash_lookup(port, eth->h_dest);
277 if (dest && dest->mode == MACVLAN_MODE_BRIDGE) {
David Warda37dd332011-05-19 02:53:20 +0000278 /* send to lowerdev first for its network taps */
David Wardcb2d0f32011-09-18 12:53:20 +0000279 dev_forward_skb(vlan->lowerdev, skb);
Arnd Bergmann618e1b72009-11-26 06:07:10 +0000280
281 return NET_XMIT_SUCCESS;
282 }
283 }
284
285xmit_world:
Daniel Lezcano12a28562011-03-14 06:08:07 +0000286 skb->ip_summed = ip_summed;
David S. Miller59b99972012-05-10 23:03:34 -0400287 skb->dev = vlan->lowerdev;
Arnd Bergmann618e1b72009-11-26 06:07:10 +0000288 return dev_queue_xmit(skb);
289}
290
Arnd Bergmannfc0663d2010-01-30 12:23:40 +0000291netdev_tx_t macvlan_start_xmit(struct sk_buff *skb,
292 struct net_device *dev)
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700293{
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700294 unsigned int len = skb->len;
295 int ret;
Eric Dumazet8ffab512010-11-10 21:14:04 +0000296 const struct macvlan_dev *vlan = netdev_priv(dev);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700297
Arnd Bergmann618e1b72009-11-26 06:07:10 +0000298 ret = macvlan_queue_xmit(skb, dev);
Eric Dumazet2d6c9ff2010-05-10 04:51:02 +0000299 if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) {
Eric Dumazet8ffab512010-11-10 21:14:04 +0000300 struct macvlan_pcpu_stats *pcpu_stats;
Eric Dumazet2c114552009-09-03 00:11:45 +0000301
Eric Dumazet8ffab512010-11-10 21:14:04 +0000302 pcpu_stats = this_cpu_ptr(vlan->pcpu_stats);
303 u64_stats_update_begin(&pcpu_stats->syncp);
304 pcpu_stats->tx_packets++;
305 pcpu_stats->tx_bytes += len;
306 u64_stats_update_end(&pcpu_stats->syncp);
307 } else {
308 this_cpu_inc(vlan->pcpu_stats->tx_dropped);
309 }
Patrick McHardycbbef5e2009-11-10 06:14:24 +0000310 return ret;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700311}
Arnd Bergmannfc0663d2010-01-30 12:23:40 +0000312EXPORT_SYMBOL_GPL(macvlan_start_xmit);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700313
314static int macvlan_hard_header(struct sk_buff *skb, struct net_device *dev,
Stephen Hemminger3b04ddd2007-10-09 01:40:57 -0700315 unsigned short type, const void *daddr,
316 const void *saddr, unsigned len)
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700317{
318 const struct macvlan_dev *vlan = netdev_priv(dev);
319 struct net_device *lowerdev = vlan->lowerdev;
320
Stephen Hemminger0c4e8582007-10-09 01:36:32 -0700321 return dev_hard_header(skb, lowerdev, type, daddr,
322 saddr ? : dev->dev_addr, len);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700323}
324
Stephen Hemminger3b04ddd2007-10-09 01:40:57 -0700325static const struct header_ops macvlan_hard_header_ops = {
326 .create = macvlan_hard_header,
327 .rebuild = eth_rebuild_header,
328 .parse = eth_header_parse,
Stephen Hemminger3b04ddd2007-10-09 01:40:57 -0700329 .cache = eth_header_cache,
330 .cache_update = eth_header_cache_update,
331};
332
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700333static int macvlan_open(struct net_device *dev)
334{
335 struct macvlan_dev *vlan = netdev_priv(dev);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700336 struct net_device *lowerdev = vlan->lowerdev;
337 int err;
338
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +0000339 if (vlan->port->passthru) {
John Fastabenddf8ef8f2012-04-15 06:44:37 +0000340 if (!(vlan->flags & MACVLAN_FLAG_NOPROMISC))
341 dev_set_promiscuity(lowerdev, 1);
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +0000342 goto hash_add;
343 }
344
Eric Biedermanf9ac30f2009-03-13 13:16:13 -0700345 err = -EBUSY;
346 if (macvlan_addr_busy(vlan->port, dev->dev_addr))
347 goto out;
348
Jiri Pirkoa748ee22010-04-01 21:22:09 +0000349 err = dev_uc_add(lowerdev, dev->dev_addr);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700350 if (err < 0)
Wang Chenb89fb7d2008-07-14 20:57:07 -0700351 goto out;
352 if (dev->flags & IFF_ALLMULTI) {
353 err = dev_set_allmulti(lowerdev, 1);
354 if (err < 0)
355 goto del_unicast;
356 }
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +0000357
358hash_add:
Eric Biedermanf9ac30f2009-03-13 13:16:13 -0700359 macvlan_hash_add(vlan);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700360 return 0;
Wang Chenb89fb7d2008-07-14 20:57:07 -0700361
362del_unicast:
Jiri Pirkoa748ee22010-04-01 21:22:09 +0000363 dev_uc_del(lowerdev, dev->dev_addr);
Wang Chenb89fb7d2008-07-14 20:57:07 -0700364out:
365 return err;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700366}
367
368static int macvlan_stop(struct net_device *dev)
369{
370 struct macvlan_dev *vlan = netdev_priv(dev);
371 struct net_device *lowerdev = vlan->lowerdev;
372
John Fastabenddf8ef8f2012-04-15 06:44:37 +0000373 dev_uc_unsync(lowerdev, dev);
374 dev_mc_unsync(lowerdev, dev);
375
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +0000376 if (vlan->port->passthru) {
John Fastabenddf8ef8f2012-04-15 06:44:37 +0000377 if (!(vlan->flags & MACVLAN_FLAG_NOPROMISC))
378 dev_set_promiscuity(lowerdev, -1);
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +0000379 goto hash_del;
380 }
381
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700382 if (dev->flags & IFF_ALLMULTI)
383 dev_set_allmulti(lowerdev, -1);
384
Jiri Pirkoa748ee22010-04-01 21:22:09 +0000385 dev_uc_del(lowerdev, dev->dev_addr);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700386
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +0000387hash_del:
Eric Dumazet449f4542011-05-19 12:24:16 +0000388 macvlan_hash_del(vlan, !dev->dismantle);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700389 return 0;
390}
391
Patrick McHardyad5d20a2007-11-19 22:00:42 -0800392static int macvlan_set_mac_address(struct net_device *dev, void *p)
393{
394 struct macvlan_dev *vlan = netdev_priv(dev);
395 struct net_device *lowerdev = vlan->lowerdev;
396 struct sockaddr *addr = p;
397 int err;
398
399 if (!is_valid_ether_addr(addr->sa_data))
400 return -EADDRNOTAVAIL;
401
Eric Biedermanf9ac30f2009-03-13 13:16:13 -0700402 if (!(dev->flags & IFF_UP)) {
403 /* Just copy in the new address */
404 memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN);
405 } else {
406 /* Rehash and update the device filters */
407 if (macvlan_addr_busy(vlan->port, addr->sa_data))
408 return -EBUSY;
Patrick McHardyad5d20a2007-11-19 22:00:42 -0800409
Jiri Pirkoa748ee22010-04-01 21:22:09 +0000410 err = dev_uc_add(lowerdev, addr->sa_data);
Jiri Pirkoccffad252009-05-22 23:22:17 +0000411 if (err)
Eric Biedermanf9ac30f2009-03-13 13:16:13 -0700412 return err;
Patrick McHardyad5d20a2007-11-19 22:00:42 -0800413
Jiri Pirkoa748ee22010-04-01 21:22:09 +0000414 dev_uc_del(lowerdev, dev->dev_addr);
Eric Biedermanf9ac30f2009-03-13 13:16:13 -0700415
416 macvlan_hash_change_addr(vlan, addr->sa_data);
417 }
Patrick McHardyad5d20a2007-11-19 22:00:42 -0800418 return 0;
419}
420
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700421static void macvlan_change_rx_flags(struct net_device *dev, int change)
422{
423 struct macvlan_dev *vlan = netdev_priv(dev);
424 struct net_device *lowerdev = vlan->lowerdev;
425
426 if (change & IFF_ALLMULTI)
427 dev_set_allmulti(lowerdev, dev->flags & IFF_ALLMULTI ? 1 : -1);
428}
429
John Fastabenddf8ef8f2012-04-15 06:44:37 +0000430static void macvlan_set_mac_lists(struct net_device *dev)
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700431{
432 struct macvlan_dev *vlan = netdev_priv(dev);
433
Eric Dumazetcd431e72013-02-05 20:22:50 +0000434 if (dev->flags & (IFF_PROMISC | IFF_ALLMULTI)) {
435 bitmap_fill(vlan->mc_filter, MACVLAN_MC_FILTER_SZ);
436 } else {
437 struct netdev_hw_addr *ha;
438 DECLARE_BITMAP(filter, MACVLAN_MC_FILTER_SZ);
439
440 bitmap_zero(filter, MACVLAN_MC_FILTER_SZ);
441 netdev_for_each_mc_addr(ha, dev) {
Eric Dumazet3807ff52013-02-07 16:41:02 +0000442 __set_bit(mc_hash(vlan, ha->addr), filter);
Eric Dumazetcd431e72013-02-05 20:22:50 +0000443 }
Eric Dumazetd5270432013-02-07 16:02:57 +0000444
Eric Dumazet3807ff52013-02-07 16:41:02 +0000445 __set_bit(mc_hash(vlan, dev->broadcast), filter);
Eric Dumazetd5270432013-02-07 16:02:57 +0000446
Eric Dumazetcd431e72013-02-05 20:22:50 +0000447 bitmap_copy(vlan->mc_filter, filter, MACVLAN_MC_FILTER_SZ);
448 }
John Fastabenddf8ef8f2012-04-15 06:44:37 +0000449 dev_uc_sync(vlan->lowerdev, dev);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700450 dev_mc_sync(vlan->lowerdev, dev);
451}
452
453static int macvlan_change_mtu(struct net_device *dev, int new_mtu)
454{
455 struct macvlan_dev *vlan = netdev_priv(dev);
456
457 if (new_mtu < 68 || vlan->lowerdev->mtu < new_mtu)
458 return -EINVAL;
459 dev->mtu = new_mtu;
460 return 0;
461}
462
463/*
464 * macvlan network devices have devices nesting below it and are a special
465 * "super class" of normal network devices; split their locks off into a
466 * separate class since they always nest.
467 */
468static struct lock_class_key macvlan_netdev_xmit_lock_key;
David S. Millercf508b12008-07-22 14:16:42 -0700469static struct lock_class_key macvlan_netdev_addr_lock_key;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700470
471#define MACVLAN_FEATURES \
472 (NETIF_F_SG | NETIF_F_ALL_CSUM | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST | \
473 NETIF_F_GSO | NETIF_F_TSO | NETIF_F_UFO | NETIF_F_GSO_ROBUST | \
John Fastabend8d13e672011-06-06 04:27:16 +0000474 NETIF_F_TSO_ECN | NETIF_F_TSO6 | NETIF_F_GRO | NETIF_F_RXCSUM | \
Patrick McHardy28d2b132013-04-19 02:04:32 +0000475 NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_HW_VLAN_STAG_FILTER)
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700476
477#define MACVLAN_STATE_MASK \
478 ((1<<__LINK_STATE_NOCARRIER) | (1<<__LINK_STATE_DORMANT))
479
David S. Millere8a04642008-07-17 00:34:19 -0700480static void macvlan_set_lockdep_class_one(struct net_device *dev,
481 struct netdev_queue *txq,
482 void *_unused)
David S. Millerc773e842008-07-08 23:13:53 -0700483{
484 lockdep_set_class(&txq->_xmit_lock,
485 &macvlan_netdev_xmit_lock_key);
486}
487
488static void macvlan_set_lockdep_class(struct net_device *dev)
489{
David S. Millercf508b12008-07-22 14:16:42 -0700490 lockdep_set_class(&dev->addr_list_lock,
491 &macvlan_netdev_addr_lock_key);
David S. Millere8a04642008-07-17 00:34:19 -0700492 netdev_for_each_tx_queue(dev, macvlan_set_lockdep_class_one, NULL);
David S. Millerc773e842008-07-08 23:13:53 -0700493}
494
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700495static int macvlan_init(struct net_device *dev)
496{
497 struct macvlan_dev *vlan = netdev_priv(dev);
498 const struct net_device *lowerdev = vlan->lowerdev;
499
500 dev->state = (dev->state & ~MACVLAN_STATE_MASK) |
501 (lowerdev->state & MACVLAN_STATE_MASK);
502 dev->features = lowerdev->features & MACVLAN_FEATURES;
Eric Dumazet8ffab512010-11-10 21:14:04 +0000503 dev->features |= NETIF_F_LLTX;
Patrick McHardy8c2acc52009-11-23 14:18:53 -0800504 dev->gso_max_size = lowerdev->gso_max_size;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700505 dev->iflink = lowerdev->ifindex;
sg.tweak@gmail.comef5c8992009-06-10 09:55:02 +0000506 dev->hard_header_len = lowerdev->hard_header_len;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700507
David S. Millerc773e842008-07-08 23:13:53 -0700508 macvlan_set_lockdep_class(dev);
509
Eric Dumazet8ffab512010-11-10 21:14:04 +0000510 vlan->pcpu_stats = alloc_percpu(struct macvlan_pcpu_stats);
511 if (!vlan->pcpu_stats)
Eric Dumazetfccaf712009-11-17 08:53:49 +0000512 return -ENOMEM;
513
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700514 return 0;
515}
516
Eric Dumazetfccaf712009-11-17 08:53:49 +0000517static void macvlan_uninit(struct net_device *dev)
518{
519 struct macvlan_dev *vlan = netdev_priv(dev);
Eric W. Biedermand5cd92442011-03-21 18:22:22 -0700520 struct macvlan_port *port = vlan->port;
Eric Dumazetfccaf712009-11-17 08:53:49 +0000521
Eric Dumazet8ffab512010-11-10 21:14:04 +0000522 free_percpu(vlan->pcpu_stats);
Eric W. Biedermand5cd92442011-03-21 18:22:22 -0700523
524 port->count -= 1;
525 if (!port->count)
526 macvlan_port_destroy(port->dev);
Eric Dumazetfccaf712009-11-17 08:53:49 +0000527}
528
Eric Dumazet28172732010-07-07 14:58:56 -0700529static struct rtnl_link_stats64 *macvlan_dev_get_stats64(struct net_device *dev,
530 struct rtnl_link_stats64 *stats)
Eric Dumazetfccaf712009-11-17 08:53:49 +0000531{
Eric Dumazetfccaf712009-11-17 08:53:49 +0000532 struct macvlan_dev *vlan = netdev_priv(dev);
533
Eric Dumazet8ffab512010-11-10 21:14:04 +0000534 if (vlan->pcpu_stats) {
535 struct macvlan_pcpu_stats *p;
536 u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes;
537 u32 rx_errors = 0, tx_dropped = 0;
Eric Dumazetbc661542010-06-24 00:54:21 +0000538 unsigned int start;
Eric Dumazetfccaf712009-11-17 08:53:49 +0000539 int i;
540
541 for_each_possible_cpu(i) {
Eric Dumazet8ffab512010-11-10 21:14:04 +0000542 p = per_cpu_ptr(vlan->pcpu_stats, i);
Eric Dumazetbc661542010-06-24 00:54:21 +0000543 do {
544 start = u64_stats_fetch_begin_bh(&p->syncp);
545 rx_packets = p->rx_packets;
546 rx_bytes = p->rx_bytes;
547 rx_multicast = p->rx_multicast;
Eric Dumazet8ffab512010-11-10 21:14:04 +0000548 tx_packets = p->tx_packets;
549 tx_bytes = p->tx_bytes;
Eric Dumazetbc661542010-06-24 00:54:21 +0000550 } while (u64_stats_fetch_retry_bh(&p->syncp, start));
Eric Dumazet8ffab512010-11-10 21:14:04 +0000551
552 stats->rx_packets += rx_packets;
553 stats->rx_bytes += rx_bytes;
554 stats->multicast += rx_multicast;
555 stats->tx_packets += tx_packets;
556 stats->tx_bytes += tx_bytes;
557 /* rx_errors & tx_dropped are u32, updated
558 * without syncp protection.
559 */
560 rx_errors += p->rx_errors;
561 tx_dropped += p->tx_dropped;
Eric Dumazetfccaf712009-11-17 08:53:49 +0000562 }
Eric Dumazet8ffab512010-11-10 21:14:04 +0000563 stats->rx_errors = rx_errors;
564 stats->rx_dropped = rx_errors;
565 stats->tx_dropped = tx_dropped;
Eric Dumazetfccaf712009-11-17 08:53:49 +0000566 }
567 return stats;
568}
569
Jiri Pirko8e586132011-12-08 19:52:37 -0500570static int macvlan_vlan_rx_add_vid(struct net_device *dev,
Patrick McHardy80d5c362013-04-19 02:04:28 +0000571 __be16 proto, u16 vid)
John Fastabend8d13e672011-06-06 04:27:16 +0000572{
573 struct macvlan_dev *vlan = netdev_priv(dev);
574 struct net_device *lowerdev = vlan->lowerdev;
John Fastabend8d13e672011-06-06 04:27:16 +0000575
Patrick McHardy80d5c362013-04-19 02:04:28 +0000576 return vlan_vid_add(lowerdev, proto, vid);
John Fastabend8d13e672011-06-06 04:27:16 +0000577}
578
Jiri Pirko8e586132011-12-08 19:52:37 -0500579static int macvlan_vlan_rx_kill_vid(struct net_device *dev,
Patrick McHardy80d5c362013-04-19 02:04:28 +0000580 __be16 proto, u16 vid)
John Fastabend8d13e672011-06-06 04:27:16 +0000581{
582 struct macvlan_dev *vlan = netdev_priv(dev);
583 struct net_device *lowerdev = vlan->lowerdev;
John Fastabend8d13e672011-06-06 04:27:16 +0000584
Patrick McHardy80d5c362013-04-19 02:04:28 +0000585 vlan_vid_del(lowerdev, proto, vid);
Jiri Pirko8e586132011-12-08 19:52:37 -0500586 return 0;
John Fastabend8d13e672011-06-06 04:27:16 +0000587}
588
stephen hemmingeredc7d572012-10-01 12:32:33 +0000589static int macvlan_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
John Fastabenddf8ef8f2012-04-15 06:44:37 +0000590 struct net_device *dev,
stephen hemminger6b6e2722012-09-17 10:03:26 +0000591 const unsigned char *addr,
John Fastabenddf8ef8f2012-04-15 06:44:37 +0000592 u16 flags)
593{
594 struct macvlan_dev *vlan = netdev_priv(dev);
595 int err = -EINVAL;
596
597 if (!vlan->port->passthru)
598 return -EOPNOTSUPP;
599
600 if (is_unicast_ether_addr(addr))
601 err = dev_uc_add_excl(dev, addr);
602 else if (is_multicast_ether_addr(addr))
603 err = dev_mc_add_excl(dev, addr);
604
605 return err;
606}
607
Vlad Yasevich1690be62013-02-13 12:00:18 +0000608static int macvlan_fdb_del(struct ndmsg *ndm, struct nlattr *tb[],
John Fastabenddf8ef8f2012-04-15 06:44:37 +0000609 struct net_device *dev,
stephen hemminger6b6e2722012-09-17 10:03:26 +0000610 const unsigned char *addr)
John Fastabenddf8ef8f2012-04-15 06:44:37 +0000611{
612 struct macvlan_dev *vlan = netdev_priv(dev);
613 int err = -EINVAL;
614
615 if (!vlan->port->passthru)
616 return -EOPNOTSUPP;
617
618 if (is_unicast_ether_addr(addr))
619 err = dev_uc_del(dev, addr);
620 else if (is_multicast_ether_addr(addr))
621 err = dev_mc_del(dev, addr);
622
623 return err;
624}
625
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700626static void macvlan_ethtool_get_drvinfo(struct net_device *dev,
627 struct ethtool_drvinfo *drvinfo)
628{
Jiri Pirko7826d432013-01-06 00:44:26 +0000629 strlcpy(drvinfo->driver, "macvlan", sizeof(drvinfo->driver));
630 strlcpy(drvinfo->version, "0.1", sizeof(drvinfo->version));
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700631}
632
Stephen Hemminger9edb8bb2008-10-29 15:31:53 -0700633static int macvlan_ethtool_get_settings(struct net_device *dev,
634 struct ethtool_cmd *cmd)
635{
636 const struct macvlan_dev *vlan = netdev_priv(dev);
Jiri Pirko4bc71cb2011-09-03 03:34:30 +0000637
638 return __ethtool_get_settings(vlan->lowerdev, cmd);
Stephen Hemminger9edb8bb2008-10-29 15:31:53 -0700639}
640
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700641static const struct ethtool_ops macvlan_ethtool_ops = {
642 .get_link = ethtool_op_get_link,
Stephen Hemminger9edb8bb2008-10-29 15:31:53 -0700643 .get_settings = macvlan_ethtool_get_settings,
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700644 .get_drvinfo = macvlan_ethtool_get_drvinfo,
645};
646
Stephen Hemminger54a30c92008-11-19 21:51:06 -0800647static const struct net_device_ops macvlan_netdev_ops = {
648 .ndo_init = macvlan_init,
Eric Dumazetfccaf712009-11-17 08:53:49 +0000649 .ndo_uninit = macvlan_uninit,
Stephen Hemminger54a30c92008-11-19 21:51:06 -0800650 .ndo_open = macvlan_open,
651 .ndo_stop = macvlan_stop,
Stephen Hemminger00829822008-11-20 20:14:53 -0800652 .ndo_start_xmit = macvlan_start_xmit,
Stephen Hemminger54a30c92008-11-19 21:51:06 -0800653 .ndo_change_mtu = macvlan_change_mtu,
654 .ndo_change_rx_flags = macvlan_change_rx_flags,
655 .ndo_set_mac_address = macvlan_set_mac_address,
John Fastabenddf8ef8f2012-04-15 06:44:37 +0000656 .ndo_set_rx_mode = macvlan_set_mac_lists,
Eric Dumazetbc661542010-06-24 00:54:21 +0000657 .ndo_get_stats64 = macvlan_dev_get_stats64,
Stephen Hemminger54a30c92008-11-19 21:51:06 -0800658 .ndo_validate_addr = eth_validate_addr,
John Fastabend8d13e672011-06-06 04:27:16 +0000659 .ndo_vlan_rx_add_vid = macvlan_vlan_rx_add_vid,
660 .ndo_vlan_rx_kill_vid = macvlan_vlan_rx_kill_vid,
John Fastabenddf8ef8f2012-04-15 06:44:37 +0000661 .ndo_fdb_add = macvlan_fdb_add,
662 .ndo_fdb_del = macvlan_fdb_del,
663 .ndo_fdb_dump = ndo_dflt_fdb_dump,
Stephen Hemminger54a30c92008-11-19 21:51:06 -0800664};
665
Herbert Xu8a357472010-07-21 21:44:31 +0000666void macvlan_common_setup(struct net_device *dev)
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700667{
668 ether_setup(dev);
669
Neil Horman550fd082011-07-26 06:05:38 +0000670 dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
Vlad Yasevich87ab7f62013-03-07 10:21:48 +0000671 dev->priv_flags |= IFF_UNICAST_FLT;
Stephen Hemminger54a30c92008-11-19 21:51:06 -0800672 dev->netdev_ops = &macvlan_netdev_ops;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700673 dev->destructor = free_netdev;
Stephen Hemminger3b04ddd2007-10-09 01:40:57 -0700674 dev->header_ops = &macvlan_hard_header_ops,
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700675 dev->ethtool_ops = &macvlan_ethtool_ops;
Herbert Xu8a357472010-07-21 21:44:31 +0000676}
677EXPORT_SYMBOL_GPL(macvlan_common_setup);
678
679static void macvlan_setup(struct net_device *dev)
680{
681 macvlan_common_setup(dev);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700682 dev->tx_queue_len = 0;
683}
684
685static int macvlan_port_create(struct net_device *dev)
686{
687 struct macvlan_port *port;
688 unsigned int i;
Jiri Pirkoab95bfe2010-06-01 21:52:08 +0000689 int err;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700690
691 if (dev->type != ARPHRD_ETHER || dev->flags & IFF_LOOPBACK)
692 return -EINVAL;
693
694 port = kzalloc(sizeof(*port), GFP_KERNEL);
695 if (port == NULL)
696 return -ENOMEM;
697
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +0000698 port->passthru = false;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700699 port->dev = dev;
700 INIT_LIST_HEAD(&port->vlans);
701 for (i = 0; i < MACVLAN_HASH_SIZE; i++)
702 INIT_HLIST_HEAD(&port->vlan_hash[i]);
Jiri Pirkoab95bfe2010-06-01 21:52:08 +0000703
Jiri Pirkoa35e2c12010-06-15 03:27:57 +0000704 err = netdev_rx_handler_register(dev, macvlan_handle_frame, port);
705 if (err)
Jiri Pirkoab95bfe2010-06-01 21:52:08 +0000706 kfree(port);
Eric Dumazetd9351562011-05-20 14:59:23 -0400707 else
708 dev->priv_flags |= IFF_MACVLAN_PORT;
Jiri Pirkoab95bfe2010-06-01 21:52:08 +0000709 return err;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700710}
711
712static void macvlan_port_destroy(struct net_device *dev)
713{
Eric Dumazete052f7e2013-03-30 10:08:44 +0000714 struct macvlan_port *port = macvlan_port_get_rtnl(dev);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700715
Jiri Pirkoa35e2c12010-06-15 03:27:57 +0000716 dev->priv_flags &= ~IFF_MACVLAN_PORT;
Jiri Pirkoab95bfe2010-06-01 21:52:08 +0000717 netdev_rx_handler_unregister(dev);
Lai Jiangshan6e070ae2011-03-18 12:00:07 +0800718 kfree_rcu(port, rcu);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700719}
720
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700721static int macvlan_validate(struct nlattr *tb[], struct nlattr *data[])
722{
723 if (tb[IFLA_ADDRESS]) {
724 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
725 return -EINVAL;
726 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
727 return -EADDRNOTAVAIL;
728 }
Arnd Bergmann27c0b1a2009-11-26 06:07:11 +0000729
730 if (data && data[IFLA_MACVLAN_MODE]) {
731 switch (nla_get_u32(data[IFLA_MACVLAN_MODE])) {
732 case MACVLAN_MODE_PRIVATE:
733 case MACVLAN_MODE_VEPA:
734 case MACVLAN_MODE_BRIDGE:
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +0000735 case MACVLAN_MODE_PASSTHRU:
Arnd Bergmann27c0b1a2009-11-26 06:07:11 +0000736 break;
737 default:
738 return -EINVAL;
739 }
740 }
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700741 return 0;
742}
743
Arnd Bergmannfc0663d2010-01-30 12:23:40 +0000744int macvlan_common_newlink(struct net *src_net, struct net_device *dev,
745 struct nlattr *tb[], struct nlattr *data[],
746 int (*receive)(struct sk_buff *skb),
747 int (*forward)(struct net_device *dev,
748 struct sk_buff *skb))
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700749{
750 struct macvlan_dev *vlan = netdev_priv(dev);
751 struct macvlan_port *port;
752 struct net_device *lowerdev;
753 int err;
754
755 if (!tb[IFLA_LINK])
756 return -EINVAL;
757
Eric W. Biederman81adee42009-11-08 00:53:51 -0800758 lowerdev = __dev_get_by_index(src_net, nla_get_u32(tb[IFLA_LINK]));
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700759 if (lowerdev == NULL)
760 return -ENODEV;
761
Eric Biedermanb0832a22009-03-13 13:15:37 -0700762 /* When creating macvlans on top of other macvlans - use
763 * the real device as the lowerdev.
Patrick McHardya6ca5f12008-01-10 22:39:28 -0800764 */
Eric Biedermanb0832a22009-03-13 13:15:37 -0700765 if (lowerdev->rtnl_link_ops == dev->rtnl_link_ops) {
766 struct macvlan_dev *lowervlan = netdev_priv(lowerdev);
767 lowerdev = lowervlan->lowerdev;
768 }
Patrick McHardya6ca5f12008-01-10 22:39:28 -0800769
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700770 if (!tb[IFLA_MTU])
771 dev->mtu = lowerdev->mtu;
772 else if (dev->mtu > lowerdev->mtu)
773 return -EINVAL;
774
775 if (!tb[IFLA_ADDRESS])
Danny Kukawka7ce5d222012-02-15 06:45:40 +0000776 eth_hw_addr_random(dev);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700777
Jiri Pirkoa35e2c12010-06-15 03:27:57 +0000778 if (!macvlan_port_exists(lowerdev)) {
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700779 err = macvlan_port_create(lowerdev);
780 if (err < 0)
781 return err;
782 }
Eric Dumazete052f7e2013-03-30 10:08:44 +0000783 port = macvlan_port_get_rtnl(lowerdev);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700784
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +0000785 /* Only 1 macvlan device can be created in passthru mode */
786 if (port->passthru)
787 return -EINVAL;
788
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700789 vlan->lowerdev = lowerdev;
790 vlan->dev = dev;
791 vlan->port = port;
Arnd Bergmannfc0663d2010-01-30 12:23:40 +0000792 vlan->receive = receive;
793 vlan->forward = forward;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700794
Arnd Bergmann27c0b1a2009-11-26 06:07:11 +0000795 vlan->mode = MACVLAN_MODE_VEPA;
796 if (data && data[IFLA_MACVLAN_MODE])
797 vlan->mode = nla_get_u32(data[IFLA_MACVLAN_MODE]);
798
John Fastabenddf8ef8f2012-04-15 06:44:37 +0000799 if (data && data[IFLA_MACVLAN_FLAGS])
800 vlan->flags = nla_get_u16(data[IFLA_MACVLAN_FLAGS]);
801
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +0000802 if (vlan->mode == MACVLAN_MODE_PASSTHRU) {
Eric W. Biedermand5cd92442011-03-21 18:22:22 -0700803 if (port->count)
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +0000804 return -EINVAL;
805 port->passthru = true;
806 memcpy(dev->dev_addr, lowerdev->dev_addr, ETH_ALEN);
807 }
808
Jiri Pirko7cd43db2013-01-03 22:48:50 +0000809 err = netdev_upper_dev_link(lowerdev, dev);
810 if (err)
811 goto destroy_port;
812
Eric W. Biedermand5cd92442011-03-21 18:22:22 -0700813 port->count += 1;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700814 err = register_netdevice(dev);
815 if (err < 0)
Jiri Pirko7cd43db2013-01-03 22:48:50 +0000816 goto upper_dev_unlink;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700817
Jiri Pirko233c7df2013-05-09 04:23:40 +0000818 list_add_tail_rcu(&vlan->list, &port->vlans);
Patrick Mullaneyfc4a7482009-12-03 15:59:22 -0800819 netif_stacked_transfer_operstate(lowerdev, dev);
Jiri Pirkof16d3d52010-05-24 07:02:25 +0000820
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700821 return 0;
Jiri Pirkof16d3d52010-05-24 07:02:25 +0000822
Jiri Pirko7cd43db2013-01-03 22:48:50 +0000823upper_dev_unlink:
824 netdev_upper_dev_unlink(lowerdev, dev);
Jiri Pirkof16d3d52010-05-24 07:02:25 +0000825destroy_port:
Eric W. Biedermand5cd92442011-03-21 18:22:22 -0700826 port->count -= 1;
827 if (!port->count)
Jiri Pirkof16d3d52010-05-24 07:02:25 +0000828 macvlan_port_destroy(lowerdev);
829
830 return err;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700831}
Arnd Bergmannfc0663d2010-01-30 12:23:40 +0000832EXPORT_SYMBOL_GPL(macvlan_common_newlink);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700833
Arnd Bergmannfc0663d2010-01-30 12:23:40 +0000834static int macvlan_newlink(struct net *src_net, struct net_device *dev,
835 struct nlattr *tb[], struct nlattr *data[])
836{
837 return macvlan_common_newlink(src_net, dev, tb, data,
838 netif_rx,
839 dev_forward_skb);
840}
841
842void macvlan_dellink(struct net_device *dev, struct list_head *head)
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700843{
844 struct macvlan_dev *vlan = netdev_priv(dev);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700845
Jiri Pirko233c7df2013-05-09 04:23:40 +0000846 list_del_rcu(&vlan->list);
Eric Dumazet23289a32009-10-27 07:06:36 +0000847 unregister_netdevice_queue(dev, head);
Jiri Pirko7cd43db2013-01-03 22:48:50 +0000848 netdev_upper_dev_unlink(vlan->lowerdev, dev);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700849}
Arnd Bergmannfc0663d2010-01-30 12:23:40 +0000850EXPORT_SYMBOL_GPL(macvlan_dellink);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700851
Arnd Bergmann27c0b1a2009-11-26 06:07:11 +0000852static int macvlan_changelink(struct net_device *dev,
853 struct nlattr *tb[], struct nlattr *data[])
854{
855 struct macvlan_dev *vlan = netdev_priv(dev);
856 if (data && data[IFLA_MACVLAN_MODE])
857 vlan->mode = nla_get_u32(data[IFLA_MACVLAN_MODE]);
John Fastabenddf8ef8f2012-04-15 06:44:37 +0000858 if (data && data[IFLA_MACVLAN_FLAGS]) {
859 __u16 flags = nla_get_u16(data[IFLA_MACVLAN_FLAGS]);
860 bool promisc = (flags ^ vlan->flags) & MACVLAN_FLAG_NOPROMISC;
861
862 if (promisc && (flags & MACVLAN_FLAG_NOPROMISC))
863 dev_set_promiscuity(vlan->lowerdev, -1);
864 else if (promisc && !(flags & MACVLAN_FLAG_NOPROMISC))
865 dev_set_promiscuity(vlan->lowerdev, 1);
866 vlan->flags = flags;
867 }
Arnd Bergmann27c0b1a2009-11-26 06:07:11 +0000868 return 0;
869}
870
871static size_t macvlan_get_size(const struct net_device *dev)
872{
Eric Dumazet01fe9442013-01-17 13:30:49 -0800873 return (0
874 + nla_total_size(4) /* IFLA_MACVLAN_MODE */
875 + nla_total_size(2) /* IFLA_MACVLAN_FLAGS */
876 );
Arnd Bergmann27c0b1a2009-11-26 06:07:11 +0000877}
878
879static int macvlan_fill_info(struct sk_buff *skb,
880 const struct net_device *dev)
881{
882 struct macvlan_dev *vlan = netdev_priv(dev);
883
David S. Milleread9a762012-04-01 20:23:06 -0400884 if (nla_put_u32(skb, IFLA_MACVLAN_MODE, vlan->mode))
885 goto nla_put_failure;
John Fastabenddf8ef8f2012-04-15 06:44:37 +0000886 if (nla_put_u16(skb, IFLA_MACVLAN_FLAGS, vlan->flags))
887 goto nla_put_failure;
Arnd Bergmann27c0b1a2009-11-26 06:07:11 +0000888 return 0;
889
890nla_put_failure:
891 return -EMSGSIZE;
892}
893
894static const struct nla_policy macvlan_policy[IFLA_MACVLAN_MAX + 1] = {
John Fastabenddf8ef8f2012-04-15 06:44:37 +0000895 [IFLA_MACVLAN_MODE] = { .type = NLA_U32 },
896 [IFLA_MACVLAN_FLAGS] = { .type = NLA_U16 },
Arnd Bergmann27c0b1a2009-11-26 06:07:11 +0000897};
898
Arnd Bergmannfc0663d2010-01-30 12:23:40 +0000899int macvlan_link_register(struct rtnl_link_ops *ops)
900{
901 /* common fields */
902 ops->priv_size = sizeof(struct macvlan_dev);
Arnd Bergmannfc0663d2010-01-30 12:23:40 +0000903 ops->validate = macvlan_validate;
904 ops->maxtype = IFLA_MACVLAN_MAX;
905 ops->policy = macvlan_policy;
906 ops->changelink = macvlan_changelink;
907 ops->get_size = macvlan_get_size;
908 ops->fill_info = macvlan_fill_info;
909
910 return rtnl_link_register(ops);
911};
912EXPORT_SYMBOL_GPL(macvlan_link_register);
913
914static struct rtnl_link_ops macvlan_link_ops = {
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700915 .kind = "macvlan",
Herbert Xu8a357472010-07-21 21:44:31 +0000916 .setup = macvlan_setup,
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700917 .newlink = macvlan_newlink,
918 .dellink = macvlan_dellink,
919};
920
921static int macvlan_device_event(struct notifier_block *unused,
922 unsigned long event, void *ptr)
923{
924 struct net_device *dev = ptr;
925 struct macvlan_dev *vlan, *next;
926 struct macvlan_port *port;
Eric Dumazet226bd342011-05-08 23:17:57 +0000927 LIST_HEAD(list_kill);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700928
Jiri Pirkoa35e2c12010-06-15 03:27:57 +0000929 if (!macvlan_port_exists(dev))
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700930 return NOTIFY_DONE;
931
Eric Dumazete052f7e2013-03-30 10:08:44 +0000932 port = macvlan_port_get_rtnl(dev);
Jiri Pirkoa35e2c12010-06-15 03:27:57 +0000933
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700934 switch (event) {
935 case NETDEV_CHANGE:
936 list_for_each_entry(vlan, &port->vlans, list)
Patrick Mullaneyfc4a7482009-12-03 15:59:22 -0800937 netif_stacked_transfer_operstate(vlan->lowerdev,
938 vlan->dev);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700939 break;
940 case NETDEV_FEAT_CHANGE:
941 list_for_each_entry(vlan, &port->vlans, list) {
942 vlan->dev->features = dev->features & MACVLAN_FEATURES;
Patrick McHardy8c2acc52009-11-23 14:18:53 -0800943 vlan->dev->gso_max_size = dev->gso_max_size;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700944 netdev_features_change(vlan->dev);
945 }
946 break;
947 case NETDEV_UNREGISTER:
David Lamparter3b27e102010-09-17 03:22:19 +0000948 /* twiddle thumbs on netns device moves */
949 if (dev->reg_state != NETREG_UNREGISTERING)
950 break;
951
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700952 list_for_each_entry_safe(vlan, next, &port->vlans, list)
Eric Dumazet226bd342011-05-08 23:17:57 +0000953 vlan->dev->rtnl_link_ops->dellink(vlan->dev, &list_kill);
954 unregister_netdevice_many(&list_kill);
955 list_del(&list_kill);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700956 break;
Jiri Pirko1c01fe12010-03-10 10:30:19 +0000957 case NETDEV_PRE_TYPE_CHANGE:
958 /* Forbid underlaying device to change its type. */
959 return NOTIFY_BAD;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700960 }
961 return NOTIFY_DONE;
962}
963
964static struct notifier_block macvlan_notifier_block __read_mostly = {
965 .notifier_call = macvlan_device_event,
966};
967
968static int __init macvlan_init_module(void)
969{
970 int err;
971
972 register_netdevice_notifier(&macvlan_notifier_block);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700973
Arnd Bergmannfc0663d2010-01-30 12:23:40 +0000974 err = macvlan_link_register(&macvlan_link_ops);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700975 if (err < 0)
976 goto err1;
977 return 0;
978err1:
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700979 unregister_netdevice_notifier(&macvlan_notifier_block);
980 return err;
981}
982
983static void __exit macvlan_cleanup_module(void)
984{
985 rtnl_link_unregister(&macvlan_link_ops);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700986 unregister_netdevice_notifier(&macvlan_notifier_block);
987}
988
989module_init(macvlan_init_module);
990module_exit(macvlan_cleanup_module);
991
992MODULE_LICENSE("GPL");
993MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>");
994MODULE_DESCRIPTION("Driver for MAC address based VLANs");
995MODULE_ALIAS_RTNL_LINK("macvlan");