blob: d5a141c7c4e786b06746c73668407c110e74611e [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)
232 vlan = list_first_entry(&port->vlans, struct macvlan_dev, list);
233 else
234 vlan = macvlan_hash_lookup(port, eth->h_dest);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700235 if (vlan == NULL)
Jiri Pirko8a4eb572011-03-12 03:14:39 +0000236 return RX_HANDLER_PASS;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700237
238 dev = vlan->dev;
239 if (unlikely(!(dev->flags & IFF_UP))) {
240 kfree_skb(skb);
Jiri Pirko8a4eb572011-03-12 03:14:39 +0000241 return RX_HANDLER_CONSUMED;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700242 }
Arnd Bergmanna1e514c2009-11-26 06:07:09 +0000243 len = skb->len + ETH_HLEN;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700244 skb = skb_share_check(skb, GFP_ATOMIC);
Arnd Bergmanna1e514c2009-11-26 06:07:09 +0000245 if (!skb)
Sridhar Samudralaba018772010-07-27 09:10:07 +0000246 goto out;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700247
248 skb->dev = dev;
249 skb->pkt_type = PACKET_HOST;
250
Sridhar Samudralaba018772010-07-27 09:10:07 +0000251 ret = vlan->receive(skb);
252
253out:
254 macvlan_count_rx(vlan, len, ret == NET_RX_SUCCESS, 0);
Jiri Pirko8a4eb572011-03-12 03:14:39 +0000255 return RX_HANDLER_CONSUMED;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700256}
257
Arnd Bergmann618e1b72009-11-26 06:07:10 +0000258static int macvlan_queue_xmit(struct sk_buff *skb, struct net_device *dev)
259{
260 const struct macvlan_dev *vlan = netdev_priv(dev);
261 const struct macvlan_port *port = vlan->port;
262 const struct macvlan_dev *dest;
Daniel Lezcano12a28562011-03-14 06:08:07 +0000263 __u8 ip_summed = skb->ip_summed;
Arnd Bergmann618e1b72009-11-26 06:07:10 +0000264
265 if (vlan->mode == MACVLAN_MODE_BRIDGE) {
266 const struct ethhdr *eth = (void *)skb->data;
Daniel Lezcano12a28562011-03-14 06:08:07 +0000267 skb->ip_summed = CHECKSUM_UNNECESSARY;
Arnd Bergmann618e1b72009-11-26 06:07:10 +0000268
269 /* send to other bridge ports directly */
270 if (is_multicast_ether_addr(eth->h_dest)) {
271 macvlan_broadcast(skb, port, dev, MACVLAN_MODE_BRIDGE);
272 goto xmit_world;
273 }
274
275 dest = macvlan_hash_lookup(port, eth->h_dest);
276 if (dest && dest->mode == MACVLAN_MODE_BRIDGE) {
David Warda37dd332011-05-19 02:53:20 +0000277 /* send to lowerdev first for its network taps */
David Wardcb2d0f32011-09-18 12:53:20 +0000278 dev_forward_skb(vlan->lowerdev, skb);
Arnd Bergmann618e1b72009-11-26 06:07:10 +0000279
280 return NET_XMIT_SUCCESS;
281 }
282 }
283
284xmit_world:
Daniel Lezcano12a28562011-03-14 06:08:07 +0000285 skb->ip_summed = ip_summed;
David S. Miller59b99972012-05-10 23:03:34 -0400286 skb->dev = vlan->lowerdev;
Arnd Bergmann618e1b72009-11-26 06:07:10 +0000287 return dev_queue_xmit(skb);
288}
289
Arnd Bergmannfc0663d2010-01-30 12:23:40 +0000290netdev_tx_t macvlan_start_xmit(struct sk_buff *skb,
291 struct net_device *dev)
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700292{
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700293 unsigned int len = skb->len;
294 int ret;
Eric Dumazet8ffab512010-11-10 21:14:04 +0000295 const struct macvlan_dev *vlan = netdev_priv(dev);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700296
Arnd Bergmann618e1b72009-11-26 06:07:10 +0000297 ret = macvlan_queue_xmit(skb, dev);
Eric Dumazet2d6c9ff2010-05-10 04:51:02 +0000298 if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) {
Eric Dumazet8ffab512010-11-10 21:14:04 +0000299 struct macvlan_pcpu_stats *pcpu_stats;
Eric Dumazet2c114552009-09-03 00:11:45 +0000300
Eric Dumazet8ffab512010-11-10 21:14:04 +0000301 pcpu_stats = this_cpu_ptr(vlan->pcpu_stats);
302 u64_stats_update_begin(&pcpu_stats->syncp);
303 pcpu_stats->tx_packets++;
304 pcpu_stats->tx_bytes += len;
305 u64_stats_update_end(&pcpu_stats->syncp);
306 } else {
307 this_cpu_inc(vlan->pcpu_stats->tx_dropped);
308 }
Patrick McHardycbbef5e2009-11-10 06:14:24 +0000309 return ret;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700310}
Arnd Bergmannfc0663d2010-01-30 12:23:40 +0000311EXPORT_SYMBOL_GPL(macvlan_start_xmit);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700312
313static int macvlan_hard_header(struct sk_buff *skb, struct net_device *dev,
Stephen Hemminger3b04ddd2007-10-09 01:40:57 -0700314 unsigned short type, const void *daddr,
315 const void *saddr, unsigned len)
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700316{
317 const struct macvlan_dev *vlan = netdev_priv(dev);
318 struct net_device *lowerdev = vlan->lowerdev;
319
Stephen Hemminger0c4e8582007-10-09 01:36:32 -0700320 return dev_hard_header(skb, lowerdev, type, daddr,
321 saddr ? : dev->dev_addr, len);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700322}
323
Stephen Hemminger3b04ddd2007-10-09 01:40:57 -0700324static const struct header_ops macvlan_hard_header_ops = {
325 .create = macvlan_hard_header,
326 .rebuild = eth_rebuild_header,
327 .parse = eth_header_parse,
Stephen Hemminger3b04ddd2007-10-09 01:40:57 -0700328 .cache = eth_header_cache,
329 .cache_update = eth_header_cache_update,
330};
331
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700332static int macvlan_open(struct net_device *dev)
333{
334 struct macvlan_dev *vlan = netdev_priv(dev);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700335 struct net_device *lowerdev = vlan->lowerdev;
336 int err;
337
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +0000338 if (vlan->port->passthru) {
John Fastabenddf8ef8f2012-04-15 06:44:37 +0000339 if (!(vlan->flags & MACVLAN_FLAG_NOPROMISC))
340 dev_set_promiscuity(lowerdev, 1);
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +0000341 goto hash_add;
342 }
343
Eric Biedermanf9ac30f2009-03-13 13:16:13 -0700344 err = -EBUSY;
345 if (macvlan_addr_busy(vlan->port, dev->dev_addr))
346 goto out;
347
Jiri Pirkoa748ee22010-04-01 21:22:09 +0000348 err = dev_uc_add(lowerdev, dev->dev_addr);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700349 if (err < 0)
Wang Chenb89fb7d2008-07-14 20:57:07 -0700350 goto out;
351 if (dev->flags & IFF_ALLMULTI) {
352 err = dev_set_allmulti(lowerdev, 1);
353 if (err < 0)
354 goto del_unicast;
355 }
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +0000356
357hash_add:
Eric Biedermanf9ac30f2009-03-13 13:16:13 -0700358 macvlan_hash_add(vlan);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700359 return 0;
Wang Chenb89fb7d2008-07-14 20:57:07 -0700360
361del_unicast:
Jiri Pirkoa748ee22010-04-01 21:22:09 +0000362 dev_uc_del(lowerdev, dev->dev_addr);
Wang Chenb89fb7d2008-07-14 20:57:07 -0700363out:
364 return err;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700365}
366
367static int macvlan_stop(struct net_device *dev)
368{
369 struct macvlan_dev *vlan = netdev_priv(dev);
370 struct net_device *lowerdev = vlan->lowerdev;
371
John Fastabenddf8ef8f2012-04-15 06:44:37 +0000372 dev_uc_unsync(lowerdev, dev);
373 dev_mc_unsync(lowerdev, dev);
374
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +0000375 if (vlan->port->passthru) {
John Fastabenddf8ef8f2012-04-15 06:44:37 +0000376 if (!(vlan->flags & MACVLAN_FLAG_NOPROMISC))
377 dev_set_promiscuity(lowerdev, -1);
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +0000378 goto hash_del;
379 }
380
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700381 if (dev->flags & IFF_ALLMULTI)
382 dev_set_allmulti(lowerdev, -1);
383
Jiri Pirkoa748ee22010-04-01 21:22:09 +0000384 dev_uc_del(lowerdev, dev->dev_addr);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700385
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +0000386hash_del:
Eric Dumazet449f4542011-05-19 12:24:16 +0000387 macvlan_hash_del(vlan, !dev->dismantle);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700388 return 0;
389}
390
Patrick McHardyad5d20a2007-11-19 22:00:42 -0800391static int macvlan_set_mac_address(struct net_device *dev, void *p)
392{
393 struct macvlan_dev *vlan = netdev_priv(dev);
394 struct net_device *lowerdev = vlan->lowerdev;
395 struct sockaddr *addr = p;
396 int err;
397
398 if (!is_valid_ether_addr(addr->sa_data))
399 return -EADDRNOTAVAIL;
400
Eric Biedermanf9ac30f2009-03-13 13:16:13 -0700401 if (!(dev->flags & IFF_UP)) {
402 /* Just copy in the new address */
403 memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN);
404 } else {
405 /* Rehash and update the device filters */
406 if (macvlan_addr_busy(vlan->port, addr->sa_data))
407 return -EBUSY;
Patrick McHardyad5d20a2007-11-19 22:00:42 -0800408
Jiri Pirkoa748ee22010-04-01 21:22:09 +0000409 err = dev_uc_add(lowerdev, addr->sa_data);
Jiri Pirkoccffad252009-05-22 23:22:17 +0000410 if (err)
Eric Biedermanf9ac30f2009-03-13 13:16:13 -0700411 return err;
Patrick McHardyad5d20a2007-11-19 22:00:42 -0800412
Jiri Pirkoa748ee22010-04-01 21:22:09 +0000413 dev_uc_del(lowerdev, dev->dev_addr);
Eric Biedermanf9ac30f2009-03-13 13:16:13 -0700414
415 macvlan_hash_change_addr(vlan, addr->sa_data);
416 }
Patrick McHardyad5d20a2007-11-19 22:00:42 -0800417 return 0;
418}
419
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700420static void macvlan_change_rx_flags(struct net_device *dev, int change)
421{
422 struct macvlan_dev *vlan = netdev_priv(dev);
423 struct net_device *lowerdev = vlan->lowerdev;
424
425 if (change & IFF_ALLMULTI)
426 dev_set_allmulti(lowerdev, dev->flags & IFF_ALLMULTI ? 1 : -1);
427}
428
John Fastabenddf8ef8f2012-04-15 06:44:37 +0000429static void macvlan_set_mac_lists(struct net_device *dev)
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700430{
431 struct macvlan_dev *vlan = netdev_priv(dev);
432
Eric Dumazetcd431e72013-02-05 20:22:50 +0000433 if (dev->flags & (IFF_PROMISC | IFF_ALLMULTI)) {
434 bitmap_fill(vlan->mc_filter, MACVLAN_MC_FILTER_SZ);
435 } else {
436 struct netdev_hw_addr *ha;
437 DECLARE_BITMAP(filter, MACVLAN_MC_FILTER_SZ);
438
439 bitmap_zero(filter, MACVLAN_MC_FILTER_SZ);
440 netdev_for_each_mc_addr(ha, dev) {
Eric Dumazet3807ff52013-02-07 16:41:02 +0000441 __set_bit(mc_hash(vlan, ha->addr), filter);
Eric Dumazetcd431e72013-02-05 20:22:50 +0000442 }
Eric Dumazetd5270432013-02-07 16:02:57 +0000443
Eric Dumazet3807ff52013-02-07 16:41:02 +0000444 __set_bit(mc_hash(vlan, dev->broadcast), filter);
Eric Dumazetd5270432013-02-07 16:02:57 +0000445
Eric Dumazetcd431e72013-02-05 20:22:50 +0000446 bitmap_copy(vlan->mc_filter, filter, MACVLAN_MC_FILTER_SZ);
447 }
John Fastabenddf8ef8f2012-04-15 06:44:37 +0000448 dev_uc_sync(vlan->lowerdev, dev);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700449 dev_mc_sync(vlan->lowerdev, dev);
450}
451
452static int macvlan_change_mtu(struct net_device *dev, int new_mtu)
453{
454 struct macvlan_dev *vlan = netdev_priv(dev);
455
456 if (new_mtu < 68 || vlan->lowerdev->mtu < new_mtu)
457 return -EINVAL;
458 dev->mtu = new_mtu;
459 return 0;
460}
461
462/*
463 * macvlan network devices have devices nesting below it and are a special
464 * "super class" of normal network devices; split their locks off into a
465 * separate class since they always nest.
466 */
467static struct lock_class_key macvlan_netdev_xmit_lock_key;
David S. Millercf508b12008-07-22 14:16:42 -0700468static struct lock_class_key macvlan_netdev_addr_lock_key;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700469
470#define MACVLAN_FEATURES \
471 (NETIF_F_SG | NETIF_F_ALL_CSUM | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST | \
472 NETIF_F_GSO | NETIF_F_TSO | NETIF_F_UFO | NETIF_F_GSO_ROBUST | \
John Fastabend8d13e672011-06-06 04:27:16 +0000473 NETIF_F_TSO_ECN | NETIF_F_TSO6 | NETIF_F_GRO | NETIF_F_RXCSUM | \
Patrick McHardy28d2b132013-04-19 02:04:32 +0000474 NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_HW_VLAN_STAG_FILTER)
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700475
476#define MACVLAN_STATE_MASK \
477 ((1<<__LINK_STATE_NOCARRIER) | (1<<__LINK_STATE_DORMANT))
478
David S. Millere8a04642008-07-17 00:34:19 -0700479static void macvlan_set_lockdep_class_one(struct net_device *dev,
480 struct netdev_queue *txq,
481 void *_unused)
David S. Millerc773e842008-07-08 23:13:53 -0700482{
483 lockdep_set_class(&txq->_xmit_lock,
484 &macvlan_netdev_xmit_lock_key);
485}
486
487static void macvlan_set_lockdep_class(struct net_device *dev)
488{
David S. Millercf508b12008-07-22 14:16:42 -0700489 lockdep_set_class(&dev->addr_list_lock,
490 &macvlan_netdev_addr_lock_key);
David S. Millere8a04642008-07-17 00:34:19 -0700491 netdev_for_each_tx_queue(dev, macvlan_set_lockdep_class_one, NULL);
David S. Millerc773e842008-07-08 23:13:53 -0700492}
493
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700494static int macvlan_init(struct net_device *dev)
495{
496 struct macvlan_dev *vlan = netdev_priv(dev);
497 const struct net_device *lowerdev = vlan->lowerdev;
498
499 dev->state = (dev->state & ~MACVLAN_STATE_MASK) |
500 (lowerdev->state & MACVLAN_STATE_MASK);
501 dev->features = lowerdev->features & MACVLAN_FEATURES;
Eric Dumazet8ffab512010-11-10 21:14:04 +0000502 dev->features |= NETIF_F_LLTX;
Patrick McHardy8c2acc52009-11-23 14:18:53 -0800503 dev->gso_max_size = lowerdev->gso_max_size;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700504 dev->iflink = lowerdev->ifindex;
sg.tweak@gmail.comef5c8992009-06-10 09:55:02 +0000505 dev->hard_header_len = lowerdev->hard_header_len;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700506
David S. Millerc773e842008-07-08 23:13:53 -0700507 macvlan_set_lockdep_class(dev);
508
Eric Dumazet8ffab512010-11-10 21:14:04 +0000509 vlan->pcpu_stats = alloc_percpu(struct macvlan_pcpu_stats);
510 if (!vlan->pcpu_stats)
Eric Dumazetfccaf712009-11-17 08:53:49 +0000511 return -ENOMEM;
512
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700513 return 0;
514}
515
Eric Dumazetfccaf712009-11-17 08:53:49 +0000516static void macvlan_uninit(struct net_device *dev)
517{
518 struct macvlan_dev *vlan = netdev_priv(dev);
Eric W. Biedermand5cd92442011-03-21 18:22:22 -0700519 struct macvlan_port *port = vlan->port;
Eric Dumazetfccaf712009-11-17 08:53:49 +0000520
Eric Dumazet8ffab512010-11-10 21:14:04 +0000521 free_percpu(vlan->pcpu_stats);
Eric W. Biedermand5cd92442011-03-21 18:22:22 -0700522
523 port->count -= 1;
524 if (!port->count)
525 macvlan_port_destroy(port->dev);
Eric Dumazetfccaf712009-11-17 08:53:49 +0000526}
527
Eric Dumazet28172732010-07-07 14:58:56 -0700528static struct rtnl_link_stats64 *macvlan_dev_get_stats64(struct net_device *dev,
529 struct rtnl_link_stats64 *stats)
Eric Dumazetfccaf712009-11-17 08:53:49 +0000530{
Eric Dumazetfccaf712009-11-17 08:53:49 +0000531 struct macvlan_dev *vlan = netdev_priv(dev);
532
Eric Dumazet8ffab512010-11-10 21:14:04 +0000533 if (vlan->pcpu_stats) {
534 struct macvlan_pcpu_stats *p;
535 u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes;
536 u32 rx_errors = 0, tx_dropped = 0;
Eric Dumazetbc661542010-06-24 00:54:21 +0000537 unsigned int start;
Eric Dumazetfccaf712009-11-17 08:53:49 +0000538 int i;
539
540 for_each_possible_cpu(i) {
Eric Dumazet8ffab512010-11-10 21:14:04 +0000541 p = per_cpu_ptr(vlan->pcpu_stats, i);
Eric Dumazetbc661542010-06-24 00:54:21 +0000542 do {
543 start = u64_stats_fetch_begin_bh(&p->syncp);
544 rx_packets = p->rx_packets;
545 rx_bytes = p->rx_bytes;
546 rx_multicast = p->rx_multicast;
Eric Dumazet8ffab512010-11-10 21:14:04 +0000547 tx_packets = p->tx_packets;
548 tx_bytes = p->tx_bytes;
Eric Dumazetbc661542010-06-24 00:54:21 +0000549 } while (u64_stats_fetch_retry_bh(&p->syncp, start));
Eric Dumazet8ffab512010-11-10 21:14:04 +0000550
551 stats->rx_packets += rx_packets;
552 stats->rx_bytes += rx_bytes;
553 stats->multicast += rx_multicast;
554 stats->tx_packets += tx_packets;
555 stats->tx_bytes += tx_bytes;
556 /* rx_errors & tx_dropped are u32, updated
557 * without syncp protection.
558 */
559 rx_errors += p->rx_errors;
560 tx_dropped += p->tx_dropped;
Eric Dumazetfccaf712009-11-17 08:53:49 +0000561 }
Eric Dumazet8ffab512010-11-10 21:14:04 +0000562 stats->rx_errors = rx_errors;
563 stats->rx_dropped = rx_errors;
564 stats->tx_dropped = tx_dropped;
Eric Dumazetfccaf712009-11-17 08:53:49 +0000565 }
566 return stats;
567}
568
Jiri Pirko8e586132011-12-08 19:52:37 -0500569static int macvlan_vlan_rx_add_vid(struct net_device *dev,
Patrick McHardy80d5c362013-04-19 02:04:28 +0000570 __be16 proto, u16 vid)
John Fastabend8d13e672011-06-06 04:27:16 +0000571{
572 struct macvlan_dev *vlan = netdev_priv(dev);
573 struct net_device *lowerdev = vlan->lowerdev;
John Fastabend8d13e672011-06-06 04:27:16 +0000574
Patrick McHardy80d5c362013-04-19 02:04:28 +0000575 return vlan_vid_add(lowerdev, proto, vid);
John Fastabend8d13e672011-06-06 04:27:16 +0000576}
577
Jiri Pirko8e586132011-12-08 19:52:37 -0500578static int macvlan_vlan_rx_kill_vid(struct net_device *dev,
Patrick McHardy80d5c362013-04-19 02:04:28 +0000579 __be16 proto, u16 vid)
John Fastabend8d13e672011-06-06 04:27:16 +0000580{
581 struct macvlan_dev *vlan = netdev_priv(dev);
582 struct net_device *lowerdev = vlan->lowerdev;
John Fastabend8d13e672011-06-06 04:27:16 +0000583
Patrick McHardy80d5c362013-04-19 02:04:28 +0000584 vlan_vid_del(lowerdev, proto, vid);
Jiri Pirko8e586132011-12-08 19:52:37 -0500585 return 0;
John Fastabend8d13e672011-06-06 04:27:16 +0000586}
587
stephen hemmingeredc7d572012-10-01 12:32:33 +0000588static int macvlan_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
John Fastabenddf8ef8f2012-04-15 06:44:37 +0000589 struct net_device *dev,
stephen hemminger6b6e2722012-09-17 10:03:26 +0000590 const unsigned char *addr,
John Fastabenddf8ef8f2012-04-15 06:44:37 +0000591 u16 flags)
592{
593 struct macvlan_dev *vlan = netdev_priv(dev);
594 int err = -EINVAL;
595
596 if (!vlan->port->passthru)
597 return -EOPNOTSUPP;
598
599 if (is_unicast_ether_addr(addr))
600 err = dev_uc_add_excl(dev, addr);
601 else if (is_multicast_ether_addr(addr))
602 err = dev_mc_add_excl(dev, addr);
603
604 return err;
605}
606
Vlad Yasevich1690be62013-02-13 12:00:18 +0000607static int macvlan_fdb_del(struct ndmsg *ndm, struct nlattr *tb[],
John Fastabenddf8ef8f2012-04-15 06:44:37 +0000608 struct net_device *dev,
stephen hemminger6b6e2722012-09-17 10:03:26 +0000609 const unsigned char *addr)
John Fastabenddf8ef8f2012-04-15 06:44:37 +0000610{
611 struct macvlan_dev *vlan = netdev_priv(dev);
612 int err = -EINVAL;
613
614 if (!vlan->port->passthru)
615 return -EOPNOTSUPP;
616
617 if (is_unicast_ether_addr(addr))
618 err = dev_uc_del(dev, addr);
619 else if (is_multicast_ether_addr(addr))
620 err = dev_mc_del(dev, addr);
621
622 return err;
623}
624
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700625static void macvlan_ethtool_get_drvinfo(struct net_device *dev,
626 struct ethtool_drvinfo *drvinfo)
627{
Jiri Pirko7826d432013-01-06 00:44:26 +0000628 strlcpy(drvinfo->driver, "macvlan", sizeof(drvinfo->driver));
629 strlcpy(drvinfo->version, "0.1", sizeof(drvinfo->version));
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700630}
631
Stephen Hemminger9edb8bb2008-10-29 15:31:53 -0700632static int macvlan_ethtool_get_settings(struct net_device *dev,
633 struct ethtool_cmd *cmd)
634{
635 const struct macvlan_dev *vlan = netdev_priv(dev);
Jiri Pirko4bc71cb2011-09-03 03:34:30 +0000636
637 return __ethtool_get_settings(vlan->lowerdev, cmd);
Stephen Hemminger9edb8bb2008-10-29 15:31:53 -0700638}
639
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700640static const struct ethtool_ops macvlan_ethtool_ops = {
641 .get_link = ethtool_op_get_link,
Stephen Hemminger9edb8bb2008-10-29 15:31:53 -0700642 .get_settings = macvlan_ethtool_get_settings,
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700643 .get_drvinfo = macvlan_ethtool_get_drvinfo,
644};
645
Stephen Hemminger54a30c92008-11-19 21:51:06 -0800646static const struct net_device_ops macvlan_netdev_ops = {
647 .ndo_init = macvlan_init,
Eric Dumazetfccaf712009-11-17 08:53:49 +0000648 .ndo_uninit = macvlan_uninit,
Stephen Hemminger54a30c92008-11-19 21:51:06 -0800649 .ndo_open = macvlan_open,
650 .ndo_stop = macvlan_stop,
Stephen Hemminger00829822008-11-20 20:14:53 -0800651 .ndo_start_xmit = macvlan_start_xmit,
Stephen Hemminger54a30c92008-11-19 21:51:06 -0800652 .ndo_change_mtu = macvlan_change_mtu,
653 .ndo_change_rx_flags = macvlan_change_rx_flags,
654 .ndo_set_mac_address = macvlan_set_mac_address,
John Fastabenddf8ef8f2012-04-15 06:44:37 +0000655 .ndo_set_rx_mode = macvlan_set_mac_lists,
Eric Dumazetbc661542010-06-24 00:54:21 +0000656 .ndo_get_stats64 = macvlan_dev_get_stats64,
Stephen Hemminger54a30c92008-11-19 21:51:06 -0800657 .ndo_validate_addr = eth_validate_addr,
John Fastabend8d13e672011-06-06 04:27:16 +0000658 .ndo_vlan_rx_add_vid = macvlan_vlan_rx_add_vid,
659 .ndo_vlan_rx_kill_vid = macvlan_vlan_rx_kill_vid,
John Fastabenddf8ef8f2012-04-15 06:44:37 +0000660 .ndo_fdb_add = macvlan_fdb_add,
661 .ndo_fdb_del = macvlan_fdb_del,
662 .ndo_fdb_dump = ndo_dflt_fdb_dump,
Stephen Hemminger54a30c92008-11-19 21:51:06 -0800663};
664
Herbert Xu8a357472010-07-21 21:44:31 +0000665void macvlan_common_setup(struct net_device *dev)
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700666{
667 ether_setup(dev);
668
Neil Horman550fd082011-07-26 06:05:38 +0000669 dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
Vlad Yasevich87ab7f62013-03-07 10:21:48 +0000670 dev->priv_flags |= IFF_UNICAST_FLT;
Stephen Hemminger54a30c92008-11-19 21:51:06 -0800671 dev->netdev_ops = &macvlan_netdev_ops;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700672 dev->destructor = free_netdev;
Stephen Hemminger3b04ddd2007-10-09 01:40:57 -0700673 dev->header_ops = &macvlan_hard_header_ops,
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700674 dev->ethtool_ops = &macvlan_ethtool_ops;
Herbert Xu8a357472010-07-21 21:44:31 +0000675}
676EXPORT_SYMBOL_GPL(macvlan_common_setup);
677
678static void macvlan_setup(struct net_device *dev)
679{
680 macvlan_common_setup(dev);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700681 dev->tx_queue_len = 0;
682}
683
684static int macvlan_port_create(struct net_device *dev)
685{
686 struct macvlan_port *port;
687 unsigned int i;
Jiri Pirkoab95bfe2010-06-01 21:52:08 +0000688 int err;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700689
690 if (dev->type != ARPHRD_ETHER || dev->flags & IFF_LOOPBACK)
691 return -EINVAL;
692
693 port = kzalloc(sizeof(*port), GFP_KERNEL);
694 if (port == NULL)
695 return -ENOMEM;
696
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +0000697 port->passthru = false;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700698 port->dev = dev;
699 INIT_LIST_HEAD(&port->vlans);
700 for (i = 0; i < MACVLAN_HASH_SIZE; i++)
701 INIT_HLIST_HEAD(&port->vlan_hash[i]);
Jiri Pirkoab95bfe2010-06-01 21:52:08 +0000702
Jiri Pirkoa35e2c12010-06-15 03:27:57 +0000703 err = netdev_rx_handler_register(dev, macvlan_handle_frame, port);
704 if (err)
Jiri Pirkoab95bfe2010-06-01 21:52:08 +0000705 kfree(port);
Eric Dumazetd9351562011-05-20 14:59:23 -0400706 else
707 dev->priv_flags |= IFF_MACVLAN_PORT;
Jiri Pirkoab95bfe2010-06-01 21:52:08 +0000708 return err;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700709}
710
711static void macvlan_port_destroy(struct net_device *dev)
712{
Eric Dumazete052f7e2013-03-30 10:08:44 +0000713 struct macvlan_port *port = macvlan_port_get_rtnl(dev);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700714
Jiri Pirkoa35e2c12010-06-15 03:27:57 +0000715 dev->priv_flags &= ~IFF_MACVLAN_PORT;
Jiri Pirkoab95bfe2010-06-01 21:52:08 +0000716 netdev_rx_handler_unregister(dev);
Lai Jiangshan6e070ae2011-03-18 12:00:07 +0800717 kfree_rcu(port, rcu);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700718}
719
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700720static int macvlan_validate(struct nlattr *tb[], struct nlattr *data[])
721{
722 if (tb[IFLA_ADDRESS]) {
723 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
724 return -EINVAL;
725 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
726 return -EADDRNOTAVAIL;
727 }
Arnd Bergmann27c0b1a2009-11-26 06:07:11 +0000728
729 if (data && data[IFLA_MACVLAN_MODE]) {
730 switch (nla_get_u32(data[IFLA_MACVLAN_MODE])) {
731 case MACVLAN_MODE_PRIVATE:
732 case MACVLAN_MODE_VEPA:
733 case MACVLAN_MODE_BRIDGE:
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +0000734 case MACVLAN_MODE_PASSTHRU:
Arnd Bergmann27c0b1a2009-11-26 06:07:11 +0000735 break;
736 default:
737 return -EINVAL;
738 }
739 }
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700740 return 0;
741}
742
Arnd Bergmannfc0663d2010-01-30 12:23:40 +0000743int macvlan_common_newlink(struct net *src_net, struct net_device *dev,
744 struct nlattr *tb[], struct nlattr *data[],
745 int (*receive)(struct sk_buff *skb),
746 int (*forward)(struct net_device *dev,
747 struct sk_buff *skb))
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700748{
749 struct macvlan_dev *vlan = netdev_priv(dev);
750 struct macvlan_port *port;
751 struct net_device *lowerdev;
752 int err;
753
754 if (!tb[IFLA_LINK])
755 return -EINVAL;
756
Eric W. Biederman81adee42009-11-08 00:53:51 -0800757 lowerdev = __dev_get_by_index(src_net, nla_get_u32(tb[IFLA_LINK]));
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700758 if (lowerdev == NULL)
759 return -ENODEV;
760
Eric Biedermanb0832a22009-03-13 13:15:37 -0700761 /* When creating macvlans on top of other macvlans - use
762 * the real device as the lowerdev.
Patrick McHardya6ca5f12008-01-10 22:39:28 -0800763 */
Eric Biedermanb0832a22009-03-13 13:15:37 -0700764 if (lowerdev->rtnl_link_ops == dev->rtnl_link_ops) {
765 struct macvlan_dev *lowervlan = netdev_priv(lowerdev);
766 lowerdev = lowervlan->lowerdev;
767 }
Patrick McHardya6ca5f12008-01-10 22:39:28 -0800768
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700769 if (!tb[IFLA_MTU])
770 dev->mtu = lowerdev->mtu;
771 else if (dev->mtu > lowerdev->mtu)
772 return -EINVAL;
773
774 if (!tb[IFLA_ADDRESS])
Danny Kukawka7ce5d222012-02-15 06:45:40 +0000775 eth_hw_addr_random(dev);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700776
Jiri Pirkoa35e2c12010-06-15 03:27:57 +0000777 if (!macvlan_port_exists(lowerdev)) {
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700778 err = macvlan_port_create(lowerdev);
779 if (err < 0)
780 return err;
781 }
Eric Dumazete052f7e2013-03-30 10:08:44 +0000782 port = macvlan_port_get_rtnl(lowerdev);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700783
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +0000784 /* Only 1 macvlan device can be created in passthru mode */
785 if (port->passthru)
786 return -EINVAL;
787
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700788 vlan->lowerdev = lowerdev;
789 vlan->dev = dev;
790 vlan->port = port;
Arnd Bergmannfc0663d2010-01-30 12:23:40 +0000791 vlan->receive = receive;
792 vlan->forward = forward;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700793
Arnd Bergmann27c0b1a2009-11-26 06:07:11 +0000794 vlan->mode = MACVLAN_MODE_VEPA;
795 if (data && data[IFLA_MACVLAN_MODE])
796 vlan->mode = nla_get_u32(data[IFLA_MACVLAN_MODE]);
797
John Fastabenddf8ef8f2012-04-15 06:44:37 +0000798 if (data && data[IFLA_MACVLAN_FLAGS])
799 vlan->flags = nla_get_u16(data[IFLA_MACVLAN_FLAGS]);
800
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +0000801 if (vlan->mode == MACVLAN_MODE_PASSTHRU) {
Eric W. Biedermand5cd92442011-03-21 18:22:22 -0700802 if (port->count)
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +0000803 return -EINVAL;
804 port->passthru = true;
805 memcpy(dev->dev_addr, lowerdev->dev_addr, ETH_ALEN);
806 }
807
Jiri Pirko7cd43db2013-01-03 22:48:50 +0000808 err = netdev_upper_dev_link(lowerdev, dev);
809 if (err)
810 goto destroy_port;
811
Eric W. Biedermand5cd92442011-03-21 18:22:22 -0700812 port->count += 1;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700813 err = register_netdevice(dev);
814 if (err < 0)
Jiri Pirko7cd43db2013-01-03 22:48:50 +0000815 goto upper_dev_unlink;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700816
817 list_add_tail(&vlan->list, &port->vlans);
Patrick Mullaneyfc4a7482009-12-03 15:59:22 -0800818 netif_stacked_transfer_operstate(lowerdev, dev);
Jiri Pirkof16d3d52010-05-24 07:02:25 +0000819
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700820 return 0;
Jiri Pirkof16d3d52010-05-24 07:02:25 +0000821
Jiri Pirko7cd43db2013-01-03 22:48:50 +0000822upper_dev_unlink:
823 netdev_upper_dev_unlink(lowerdev, dev);
Jiri Pirkof16d3d52010-05-24 07:02:25 +0000824destroy_port:
Eric W. Biedermand5cd92442011-03-21 18:22:22 -0700825 port->count -= 1;
826 if (!port->count)
Jiri Pirkof16d3d52010-05-24 07:02:25 +0000827 macvlan_port_destroy(lowerdev);
828
829 return err;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700830}
Arnd Bergmannfc0663d2010-01-30 12:23:40 +0000831EXPORT_SYMBOL_GPL(macvlan_common_newlink);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700832
Arnd Bergmannfc0663d2010-01-30 12:23:40 +0000833static int macvlan_newlink(struct net *src_net, struct net_device *dev,
834 struct nlattr *tb[], struct nlattr *data[])
835{
836 return macvlan_common_newlink(src_net, dev, tb, data,
837 netif_rx,
838 dev_forward_skb);
839}
840
841void macvlan_dellink(struct net_device *dev, struct list_head *head)
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700842{
843 struct macvlan_dev *vlan = netdev_priv(dev);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700844
845 list_del(&vlan->list);
Eric Dumazet23289a32009-10-27 07:06:36 +0000846 unregister_netdevice_queue(dev, head);
Jiri Pirko7cd43db2013-01-03 22:48:50 +0000847 netdev_upper_dev_unlink(vlan->lowerdev, dev);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700848}
Arnd Bergmannfc0663d2010-01-30 12:23:40 +0000849EXPORT_SYMBOL_GPL(macvlan_dellink);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700850
Arnd Bergmann27c0b1a2009-11-26 06:07:11 +0000851static int macvlan_changelink(struct net_device *dev,
852 struct nlattr *tb[], struct nlattr *data[])
853{
854 struct macvlan_dev *vlan = netdev_priv(dev);
855 if (data && data[IFLA_MACVLAN_MODE])
856 vlan->mode = nla_get_u32(data[IFLA_MACVLAN_MODE]);
John Fastabenddf8ef8f2012-04-15 06:44:37 +0000857 if (data && data[IFLA_MACVLAN_FLAGS]) {
858 __u16 flags = nla_get_u16(data[IFLA_MACVLAN_FLAGS]);
859 bool promisc = (flags ^ vlan->flags) & MACVLAN_FLAG_NOPROMISC;
860
861 if (promisc && (flags & MACVLAN_FLAG_NOPROMISC))
862 dev_set_promiscuity(vlan->lowerdev, -1);
863 else if (promisc && !(flags & MACVLAN_FLAG_NOPROMISC))
864 dev_set_promiscuity(vlan->lowerdev, 1);
865 vlan->flags = flags;
866 }
Arnd Bergmann27c0b1a2009-11-26 06:07:11 +0000867 return 0;
868}
869
870static size_t macvlan_get_size(const struct net_device *dev)
871{
Eric Dumazet01fe9442013-01-17 13:30:49 -0800872 return (0
873 + nla_total_size(4) /* IFLA_MACVLAN_MODE */
874 + nla_total_size(2) /* IFLA_MACVLAN_FLAGS */
875 );
Arnd Bergmann27c0b1a2009-11-26 06:07:11 +0000876}
877
878static int macvlan_fill_info(struct sk_buff *skb,
879 const struct net_device *dev)
880{
881 struct macvlan_dev *vlan = netdev_priv(dev);
882
David S. Milleread9a762012-04-01 20:23:06 -0400883 if (nla_put_u32(skb, IFLA_MACVLAN_MODE, vlan->mode))
884 goto nla_put_failure;
John Fastabenddf8ef8f2012-04-15 06:44:37 +0000885 if (nla_put_u16(skb, IFLA_MACVLAN_FLAGS, vlan->flags))
886 goto nla_put_failure;
Arnd Bergmann27c0b1a2009-11-26 06:07:11 +0000887 return 0;
888
889nla_put_failure:
890 return -EMSGSIZE;
891}
892
893static const struct nla_policy macvlan_policy[IFLA_MACVLAN_MAX + 1] = {
John Fastabenddf8ef8f2012-04-15 06:44:37 +0000894 [IFLA_MACVLAN_MODE] = { .type = NLA_U32 },
895 [IFLA_MACVLAN_FLAGS] = { .type = NLA_U16 },
Arnd Bergmann27c0b1a2009-11-26 06:07:11 +0000896};
897
Arnd Bergmannfc0663d2010-01-30 12:23:40 +0000898int macvlan_link_register(struct rtnl_link_ops *ops)
899{
900 /* common fields */
901 ops->priv_size = sizeof(struct macvlan_dev);
Arnd Bergmannfc0663d2010-01-30 12:23:40 +0000902 ops->validate = macvlan_validate;
903 ops->maxtype = IFLA_MACVLAN_MAX;
904 ops->policy = macvlan_policy;
905 ops->changelink = macvlan_changelink;
906 ops->get_size = macvlan_get_size;
907 ops->fill_info = macvlan_fill_info;
908
909 return rtnl_link_register(ops);
910};
911EXPORT_SYMBOL_GPL(macvlan_link_register);
912
913static struct rtnl_link_ops macvlan_link_ops = {
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700914 .kind = "macvlan",
Herbert Xu8a357472010-07-21 21:44:31 +0000915 .setup = macvlan_setup,
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700916 .newlink = macvlan_newlink,
917 .dellink = macvlan_dellink,
918};
919
920static int macvlan_device_event(struct notifier_block *unused,
921 unsigned long event, void *ptr)
922{
923 struct net_device *dev = ptr;
924 struct macvlan_dev *vlan, *next;
925 struct macvlan_port *port;
Eric Dumazet226bd342011-05-08 23:17:57 +0000926 LIST_HEAD(list_kill);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700927
Jiri Pirkoa35e2c12010-06-15 03:27:57 +0000928 if (!macvlan_port_exists(dev))
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700929 return NOTIFY_DONE;
930
Eric Dumazete052f7e2013-03-30 10:08:44 +0000931 port = macvlan_port_get_rtnl(dev);
Jiri Pirkoa35e2c12010-06-15 03:27:57 +0000932
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700933 switch (event) {
934 case NETDEV_CHANGE:
935 list_for_each_entry(vlan, &port->vlans, list)
Patrick Mullaneyfc4a7482009-12-03 15:59:22 -0800936 netif_stacked_transfer_operstate(vlan->lowerdev,
937 vlan->dev);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700938 break;
939 case NETDEV_FEAT_CHANGE:
940 list_for_each_entry(vlan, &port->vlans, list) {
941 vlan->dev->features = dev->features & MACVLAN_FEATURES;
Patrick McHardy8c2acc52009-11-23 14:18:53 -0800942 vlan->dev->gso_max_size = dev->gso_max_size;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700943 netdev_features_change(vlan->dev);
944 }
945 break;
946 case NETDEV_UNREGISTER:
David Lamparter3b27e102010-09-17 03:22:19 +0000947 /* twiddle thumbs on netns device moves */
948 if (dev->reg_state != NETREG_UNREGISTERING)
949 break;
950
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700951 list_for_each_entry_safe(vlan, next, &port->vlans, list)
Eric Dumazet226bd342011-05-08 23:17:57 +0000952 vlan->dev->rtnl_link_ops->dellink(vlan->dev, &list_kill);
953 unregister_netdevice_many(&list_kill);
954 list_del(&list_kill);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700955 break;
Jiri Pirko1c01fe12010-03-10 10:30:19 +0000956 case NETDEV_PRE_TYPE_CHANGE:
957 /* Forbid underlaying device to change its type. */
958 return NOTIFY_BAD;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700959 }
960 return NOTIFY_DONE;
961}
962
963static struct notifier_block macvlan_notifier_block __read_mostly = {
964 .notifier_call = macvlan_device_event,
965};
966
967static int __init macvlan_init_module(void)
968{
969 int err;
970
971 register_netdevice_notifier(&macvlan_notifier_block);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700972
Arnd Bergmannfc0663d2010-01-30 12:23:40 +0000973 err = macvlan_link_register(&macvlan_link_ops);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700974 if (err < 0)
975 goto err1;
976 return 0;
977err1:
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700978 unregister_netdevice_notifier(&macvlan_notifier_block);
979 return err;
980}
981
982static void __exit macvlan_cleanup_module(void)
983{
984 rtnl_link_unregister(&macvlan_link_ops);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700985 unregister_netdevice_notifier(&macvlan_notifier_block);
986}
987
988module_init(macvlan_init_module);
989module_exit(macvlan_cleanup_module);
990
991MODULE_LICENSE("GPL");
992MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>");
993MODULE_DESCRIPTION("Driver for MAC address based VLANs");
994MODULE_ALIAS_RTNL_LINK("macvlan");