blob: d0f9c2fd1d4fdaa06110d394411f48bb5f8874bb [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) {
Michael S. Tsirkin78738142013-08-01 13:50:10 +0300340 if (!(vlan->flags & MACVLAN_FLAG_NOPROMISC)) {
341 err = dev_set_promiscuity(lowerdev, 1);
342 if (err < 0)
343 goto out;
344 }
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +0000345 goto hash_add;
346 }
347
Eric Biedermanf9ac30f2009-03-13 13:16:13 -0700348 err = -EBUSY;
349 if (macvlan_addr_busy(vlan->port, dev->dev_addr))
350 goto out;
351
Jiri Pirkoa748ee22010-04-01 21:22:09 +0000352 err = dev_uc_add(lowerdev, dev->dev_addr);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700353 if (err < 0)
Wang Chenb89fb7d2008-07-14 20:57:07 -0700354 goto out;
355 if (dev->flags & IFF_ALLMULTI) {
356 err = dev_set_allmulti(lowerdev, 1);
357 if (err < 0)
358 goto del_unicast;
359 }
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +0000360
361hash_add:
Eric Biedermanf9ac30f2009-03-13 13:16:13 -0700362 macvlan_hash_add(vlan);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700363 return 0;
Wang Chenb89fb7d2008-07-14 20:57:07 -0700364
365del_unicast:
Jiri Pirkoa748ee22010-04-01 21:22:09 +0000366 dev_uc_del(lowerdev, dev->dev_addr);
Wang Chenb89fb7d2008-07-14 20:57:07 -0700367out:
368 return err;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700369}
370
371static int macvlan_stop(struct net_device *dev)
372{
373 struct macvlan_dev *vlan = netdev_priv(dev);
374 struct net_device *lowerdev = vlan->lowerdev;
375
John Fastabenddf8ef8f2012-04-15 06:44:37 +0000376 dev_uc_unsync(lowerdev, dev);
377 dev_mc_unsync(lowerdev, dev);
378
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +0000379 if (vlan->port->passthru) {
John Fastabenddf8ef8f2012-04-15 06:44:37 +0000380 if (!(vlan->flags & MACVLAN_FLAG_NOPROMISC))
381 dev_set_promiscuity(lowerdev, -1);
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +0000382 goto hash_del;
383 }
384
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700385 if (dev->flags & IFF_ALLMULTI)
386 dev_set_allmulti(lowerdev, -1);
387
Jiri Pirkoa748ee22010-04-01 21:22:09 +0000388 dev_uc_del(lowerdev, dev->dev_addr);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700389
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +0000390hash_del:
Eric Dumazet449f4542011-05-19 12:24:16 +0000391 macvlan_hash_del(vlan, !dev->dismantle);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700392 return 0;
393}
394
Patrick McHardyad5d20a2007-11-19 22:00:42 -0800395static int macvlan_set_mac_address(struct net_device *dev, void *p)
396{
397 struct macvlan_dev *vlan = netdev_priv(dev);
398 struct net_device *lowerdev = vlan->lowerdev;
399 struct sockaddr *addr = p;
400 int err;
401
402 if (!is_valid_ether_addr(addr->sa_data))
403 return -EADDRNOTAVAIL;
404
Eric Biedermanf9ac30f2009-03-13 13:16:13 -0700405 if (!(dev->flags & IFF_UP)) {
406 /* Just copy in the new address */
407 memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN);
408 } else {
409 /* Rehash and update the device filters */
410 if (macvlan_addr_busy(vlan->port, addr->sa_data))
411 return -EBUSY;
Patrick McHardyad5d20a2007-11-19 22:00:42 -0800412
Jiri Pirkoa748ee22010-04-01 21:22:09 +0000413 err = dev_uc_add(lowerdev, addr->sa_data);
Jiri Pirkoccffad252009-05-22 23:22:17 +0000414 if (err)
Eric Biedermanf9ac30f2009-03-13 13:16:13 -0700415 return err;
Patrick McHardyad5d20a2007-11-19 22:00:42 -0800416
Jiri Pirkoa748ee22010-04-01 21:22:09 +0000417 dev_uc_del(lowerdev, dev->dev_addr);
Eric Biedermanf9ac30f2009-03-13 13:16:13 -0700418
419 macvlan_hash_change_addr(vlan, addr->sa_data);
420 }
Patrick McHardyad5d20a2007-11-19 22:00:42 -0800421 return 0;
422}
423
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700424static void macvlan_change_rx_flags(struct net_device *dev, int change)
425{
426 struct macvlan_dev *vlan = netdev_priv(dev);
427 struct net_device *lowerdev = vlan->lowerdev;
428
429 if (change & IFF_ALLMULTI)
430 dev_set_allmulti(lowerdev, dev->flags & IFF_ALLMULTI ? 1 : -1);
431}
432
John Fastabenddf8ef8f2012-04-15 06:44:37 +0000433static void macvlan_set_mac_lists(struct net_device *dev)
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700434{
435 struct macvlan_dev *vlan = netdev_priv(dev);
436
Eric Dumazetcd431e72013-02-05 20:22:50 +0000437 if (dev->flags & (IFF_PROMISC | IFF_ALLMULTI)) {
438 bitmap_fill(vlan->mc_filter, MACVLAN_MC_FILTER_SZ);
439 } else {
440 struct netdev_hw_addr *ha;
441 DECLARE_BITMAP(filter, MACVLAN_MC_FILTER_SZ);
442
443 bitmap_zero(filter, MACVLAN_MC_FILTER_SZ);
444 netdev_for_each_mc_addr(ha, dev) {
Eric Dumazet3807ff52013-02-07 16:41:02 +0000445 __set_bit(mc_hash(vlan, ha->addr), filter);
Eric Dumazetcd431e72013-02-05 20:22:50 +0000446 }
Eric Dumazetd5270432013-02-07 16:02:57 +0000447
Eric Dumazet3807ff52013-02-07 16:41:02 +0000448 __set_bit(mc_hash(vlan, dev->broadcast), filter);
Eric Dumazetd5270432013-02-07 16:02:57 +0000449
Eric Dumazetcd431e72013-02-05 20:22:50 +0000450 bitmap_copy(vlan->mc_filter, filter, MACVLAN_MC_FILTER_SZ);
451 }
John Fastabenddf8ef8f2012-04-15 06:44:37 +0000452 dev_uc_sync(vlan->lowerdev, dev);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700453 dev_mc_sync(vlan->lowerdev, dev);
454}
455
456static int macvlan_change_mtu(struct net_device *dev, int new_mtu)
457{
458 struct macvlan_dev *vlan = netdev_priv(dev);
459
460 if (new_mtu < 68 || vlan->lowerdev->mtu < new_mtu)
461 return -EINVAL;
462 dev->mtu = new_mtu;
463 return 0;
464}
465
466/*
467 * macvlan network devices have devices nesting below it and are a special
468 * "super class" of normal network devices; split their locks off into a
469 * separate class since they always nest.
470 */
471static struct lock_class_key macvlan_netdev_xmit_lock_key;
David S. Millercf508b12008-07-22 14:16:42 -0700472static struct lock_class_key macvlan_netdev_addr_lock_key;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700473
474#define MACVLAN_FEATURES \
475 (NETIF_F_SG | NETIF_F_ALL_CSUM | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST | \
476 NETIF_F_GSO | NETIF_F_TSO | NETIF_F_UFO | NETIF_F_GSO_ROBUST | \
John Fastabend8d13e672011-06-06 04:27:16 +0000477 NETIF_F_TSO_ECN | NETIF_F_TSO6 | NETIF_F_GRO | NETIF_F_RXCSUM | \
Patrick McHardy28d2b132013-04-19 02:04:32 +0000478 NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_HW_VLAN_STAG_FILTER)
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700479
480#define MACVLAN_STATE_MASK \
481 ((1<<__LINK_STATE_NOCARRIER) | (1<<__LINK_STATE_DORMANT))
482
David S. Millere8a04642008-07-17 00:34:19 -0700483static void macvlan_set_lockdep_class_one(struct net_device *dev,
484 struct netdev_queue *txq,
485 void *_unused)
David S. Millerc773e842008-07-08 23:13:53 -0700486{
487 lockdep_set_class(&txq->_xmit_lock,
488 &macvlan_netdev_xmit_lock_key);
489}
490
491static void macvlan_set_lockdep_class(struct net_device *dev)
492{
David S. Millercf508b12008-07-22 14:16:42 -0700493 lockdep_set_class(&dev->addr_list_lock,
494 &macvlan_netdev_addr_lock_key);
David S. Millere8a04642008-07-17 00:34:19 -0700495 netdev_for_each_tx_queue(dev, macvlan_set_lockdep_class_one, NULL);
David S. Millerc773e842008-07-08 23:13:53 -0700496}
497
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700498static int macvlan_init(struct net_device *dev)
499{
500 struct macvlan_dev *vlan = netdev_priv(dev);
501 const struct net_device *lowerdev = vlan->lowerdev;
502
503 dev->state = (dev->state & ~MACVLAN_STATE_MASK) |
504 (lowerdev->state & MACVLAN_STATE_MASK);
505 dev->features = lowerdev->features & MACVLAN_FEATURES;
Eric Dumazet8ffab512010-11-10 21:14:04 +0000506 dev->features |= NETIF_F_LLTX;
Patrick McHardy8c2acc52009-11-23 14:18:53 -0800507 dev->gso_max_size = lowerdev->gso_max_size;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700508 dev->iflink = lowerdev->ifindex;
sg.tweak@gmail.comef5c8992009-06-10 09:55:02 +0000509 dev->hard_header_len = lowerdev->hard_header_len;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700510
David S. Millerc773e842008-07-08 23:13:53 -0700511 macvlan_set_lockdep_class(dev);
512
Eric Dumazet8ffab512010-11-10 21:14:04 +0000513 vlan->pcpu_stats = alloc_percpu(struct macvlan_pcpu_stats);
514 if (!vlan->pcpu_stats)
Eric Dumazetfccaf712009-11-17 08:53:49 +0000515 return -ENOMEM;
516
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700517 return 0;
518}
519
Eric Dumazetfccaf712009-11-17 08:53:49 +0000520static void macvlan_uninit(struct net_device *dev)
521{
522 struct macvlan_dev *vlan = netdev_priv(dev);
Eric W. Biedermand5cd92442011-03-21 18:22:22 -0700523 struct macvlan_port *port = vlan->port;
Eric Dumazetfccaf712009-11-17 08:53:49 +0000524
Eric Dumazet8ffab512010-11-10 21:14:04 +0000525 free_percpu(vlan->pcpu_stats);
Eric W. Biedermand5cd92442011-03-21 18:22:22 -0700526
527 port->count -= 1;
528 if (!port->count)
529 macvlan_port_destroy(port->dev);
Eric Dumazetfccaf712009-11-17 08:53:49 +0000530}
531
Eric Dumazet28172732010-07-07 14:58:56 -0700532static struct rtnl_link_stats64 *macvlan_dev_get_stats64(struct net_device *dev,
533 struct rtnl_link_stats64 *stats)
Eric Dumazetfccaf712009-11-17 08:53:49 +0000534{
Eric Dumazetfccaf712009-11-17 08:53:49 +0000535 struct macvlan_dev *vlan = netdev_priv(dev);
536
Eric Dumazet8ffab512010-11-10 21:14:04 +0000537 if (vlan->pcpu_stats) {
538 struct macvlan_pcpu_stats *p;
539 u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes;
540 u32 rx_errors = 0, tx_dropped = 0;
Eric Dumazetbc661542010-06-24 00:54:21 +0000541 unsigned int start;
Eric Dumazetfccaf712009-11-17 08:53:49 +0000542 int i;
543
544 for_each_possible_cpu(i) {
Eric Dumazet8ffab512010-11-10 21:14:04 +0000545 p = per_cpu_ptr(vlan->pcpu_stats, i);
Eric Dumazetbc661542010-06-24 00:54:21 +0000546 do {
547 start = u64_stats_fetch_begin_bh(&p->syncp);
548 rx_packets = p->rx_packets;
549 rx_bytes = p->rx_bytes;
550 rx_multicast = p->rx_multicast;
Eric Dumazet8ffab512010-11-10 21:14:04 +0000551 tx_packets = p->tx_packets;
552 tx_bytes = p->tx_bytes;
Eric Dumazetbc661542010-06-24 00:54:21 +0000553 } while (u64_stats_fetch_retry_bh(&p->syncp, start));
Eric Dumazet8ffab512010-11-10 21:14:04 +0000554
555 stats->rx_packets += rx_packets;
556 stats->rx_bytes += rx_bytes;
557 stats->multicast += rx_multicast;
558 stats->tx_packets += tx_packets;
559 stats->tx_bytes += tx_bytes;
560 /* rx_errors & tx_dropped are u32, updated
561 * without syncp protection.
562 */
563 rx_errors += p->rx_errors;
564 tx_dropped += p->tx_dropped;
Eric Dumazetfccaf712009-11-17 08:53:49 +0000565 }
Eric Dumazet8ffab512010-11-10 21:14:04 +0000566 stats->rx_errors = rx_errors;
567 stats->rx_dropped = rx_errors;
568 stats->tx_dropped = tx_dropped;
Eric Dumazetfccaf712009-11-17 08:53:49 +0000569 }
570 return stats;
571}
572
Jiri Pirko8e586132011-12-08 19:52:37 -0500573static int macvlan_vlan_rx_add_vid(struct net_device *dev,
Patrick McHardy80d5c362013-04-19 02:04:28 +0000574 __be16 proto, u16 vid)
John Fastabend8d13e672011-06-06 04:27:16 +0000575{
576 struct macvlan_dev *vlan = netdev_priv(dev);
577 struct net_device *lowerdev = vlan->lowerdev;
John Fastabend8d13e672011-06-06 04:27:16 +0000578
Patrick McHardy80d5c362013-04-19 02:04:28 +0000579 return vlan_vid_add(lowerdev, proto, vid);
John Fastabend8d13e672011-06-06 04:27:16 +0000580}
581
Jiri Pirko8e586132011-12-08 19:52:37 -0500582static int macvlan_vlan_rx_kill_vid(struct net_device *dev,
Patrick McHardy80d5c362013-04-19 02:04:28 +0000583 __be16 proto, u16 vid)
John Fastabend8d13e672011-06-06 04:27:16 +0000584{
585 struct macvlan_dev *vlan = netdev_priv(dev);
586 struct net_device *lowerdev = vlan->lowerdev;
John Fastabend8d13e672011-06-06 04:27:16 +0000587
Patrick McHardy80d5c362013-04-19 02:04:28 +0000588 vlan_vid_del(lowerdev, proto, vid);
Jiri Pirko8e586132011-12-08 19:52:37 -0500589 return 0;
John Fastabend8d13e672011-06-06 04:27:16 +0000590}
591
stephen hemmingeredc7d572012-10-01 12:32:33 +0000592static int macvlan_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
John Fastabenddf8ef8f2012-04-15 06:44:37 +0000593 struct net_device *dev,
stephen hemminger6b6e2722012-09-17 10:03:26 +0000594 const unsigned char *addr,
John Fastabenddf8ef8f2012-04-15 06:44:37 +0000595 u16 flags)
596{
597 struct macvlan_dev *vlan = netdev_priv(dev);
598 int err = -EINVAL;
599
600 if (!vlan->port->passthru)
601 return -EOPNOTSUPP;
602
603 if (is_unicast_ether_addr(addr))
604 err = dev_uc_add_excl(dev, addr);
605 else if (is_multicast_ether_addr(addr))
606 err = dev_mc_add_excl(dev, addr);
607
608 return err;
609}
610
Vlad Yasevich1690be62013-02-13 12:00:18 +0000611static int macvlan_fdb_del(struct ndmsg *ndm, struct nlattr *tb[],
John Fastabenddf8ef8f2012-04-15 06:44:37 +0000612 struct net_device *dev,
stephen hemminger6b6e2722012-09-17 10:03:26 +0000613 const unsigned char *addr)
John Fastabenddf8ef8f2012-04-15 06:44:37 +0000614{
615 struct macvlan_dev *vlan = netdev_priv(dev);
616 int err = -EINVAL;
617
618 if (!vlan->port->passthru)
619 return -EOPNOTSUPP;
620
621 if (is_unicast_ether_addr(addr))
622 err = dev_uc_del(dev, addr);
623 else if (is_multicast_ether_addr(addr))
624 err = dev_mc_del(dev, addr);
625
626 return err;
627}
628
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700629static void macvlan_ethtool_get_drvinfo(struct net_device *dev,
630 struct ethtool_drvinfo *drvinfo)
631{
Jiri Pirko7826d432013-01-06 00:44:26 +0000632 strlcpy(drvinfo->driver, "macvlan", sizeof(drvinfo->driver));
633 strlcpy(drvinfo->version, "0.1", sizeof(drvinfo->version));
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700634}
635
Stephen Hemminger9edb8bb2008-10-29 15:31:53 -0700636static int macvlan_ethtool_get_settings(struct net_device *dev,
637 struct ethtool_cmd *cmd)
638{
639 const struct macvlan_dev *vlan = netdev_priv(dev);
Jiri Pirko4bc71cb2011-09-03 03:34:30 +0000640
641 return __ethtool_get_settings(vlan->lowerdev, cmd);
Stephen Hemminger9edb8bb2008-10-29 15:31:53 -0700642}
643
Vlad Yasevich2be5c762013-06-25 16:04:21 -0400644static netdev_features_t macvlan_fix_features(struct net_device *dev,
645 netdev_features_t features)
646{
647 struct macvlan_dev *vlan = netdev_priv(dev);
648
649 return features & (vlan->set_features | ~MACVLAN_FEATURES);
650}
651
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700652static const struct ethtool_ops macvlan_ethtool_ops = {
653 .get_link = ethtool_op_get_link,
Stephen Hemminger9edb8bb2008-10-29 15:31:53 -0700654 .get_settings = macvlan_ethtool_get_settings,
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700655 .get_drvinfo = macvlan_ethtool_get_drvinfo,
656};
657
Stephen Hemminger54a30c92008-11-19 21:51:06 -0800658static const struct net_device_ops macvlan_netdev_ops = {
659 .ndo_init = macvlan_init,
Eric Dumazetfccaf712009-11-17 08:53:49 +0000660 .ndo_uninit = macvlan_uninit,
Stephen Hemminger54a30c92008-11-19 21:51:06 -0800661 .ndo_open = macvlan_open,
662 .ndo_stop = macvlan_stop,
Stephen Hemminger00829822008-11-20 20:14:53 -0800663 .ndo_start_xmit = macvlan_start_xmit,
Stephen Hemminger54a30c92008-11-19 21:51:06 -0800664 .ndo_change_mtu = macvlan_change_mtu,
Vlad Yasevich2be5c762013-06-25 16:04:21 -0400665 .ndo_fix_features = macvlan_fix_features,
Stephen Hemminger54a30c92008-11-19 21:51:06 -0800666 .ndo_change_rx_flags = macvlan_change_rx_flags,
667 .ndo_set_mac_address = macvlan_set_mac_address,
John Fastabenddf8ef8f2012-04-15 06:44:37 +0000668 .ndo_set_rx_mode = macvlan_set_mac_lists,
Eric Dumazetbc661542010-06-24 00:54:21 +0000669 .ndo_get_stats64 = macvlan_dev_get_stats64,
Stephen Hemminger54a30c92008-11-19 21:51:06 -0800670 .ndo_validate_addr = eth_validate_addr,
John Fastabend8d13e672011-06-06 04:27:16 +0000671 .ndo_vlan_rx_add_vid = macvlan_vlan_rx_add_vid,
672 .ndo_vlan_rx_kill_vid = macvlan_vlan_rx_kill_vid,
John Fastabenddf8ef8f2012-04-15 06:44:37 +0000673 .ndo_fdb_add = macvlan_fdb_add,
674 .ndo_fdb_del = macvlan_fdb_del,
675 .ndo_fdb_dump = ndo_dflt_fdb_dump,
Stephen Hemminger54a30c92008-11-19 21:51:06 -0800676};
677
Herbert Xu8a357472010-07-21 21:44:31 +0000678void macvlan_common_setup(struct net_device *dev)
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700679{
680 ether_setup(dev);
681
Neil Horman550fd082011-07-26 06:05:38 +0000682 dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
Vlad Yasevich87ab7f62013-03-07 10:21:48 +0000683 dev->priv_flags |= IFF_UNICAST_FLT;
Stephen Hemminger54a30c92008-11-19 21:51:06 -0800684 dev->netdev_ops = &macvlan_netdev_ops;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700685 dev->destructor = free_netdev;
Stephen Hemminger3b04ddd2007-10-09 01:40:57 -0700686 dev->header_ops = &macvlan_hard_header_ops,
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700687 dev->ethtool_ops = &macvlan_ethtool_ops;
Herbert Xu8a357472010-07-21 21:44:31 +0000688}
689EXPORT_SYMBOL_GPL(macvlan_common_setup);
690
691static void macvlan_setup(struct net_device *dev)
692{
693 macvlan_common_setup(dev);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700694 dev->tx_queue_len = 0;
695}
696
697static int macvlan_port_create(struct net_device *dev)
698{
699 struct macvlan_port *port;
700 unsigned int i;
Jiri Pirkoab95bfe2010-06-01 21:52:08 +0000701 int err;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700702
703 if (dev->type != ARPHRD_ETHER || dev->flags & IFF_LOOPBACK)
704 return -EINVAL;
705
706 port = kzalloc(sizeof(*port), GFP_KERNEL);
707 if (port == NULL)
708 return -ENOMEM;
709
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +0000710 port->passthru = false;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700711 port->dev = dev;
712 INIT_LIST_HEAD(&port->vlans);
713 for (i = 0; i < MACVLAN_HASH_SIZE; i++)
714 INIT_HLIST_HEAD(&port->vlan_hash[i]);
Jiri Pirkoab95bfe2010-06-01 21:52:08 +0000715
Jiri Pirkoa35e2c12010-06-15 03:27:57 +0000716 err = netdev_rx_handler_register(dev, macvlan_handle_frame, port);
717 if (err)
Jiri Pirkoab95bfe2010-06-01 21:52:08 +0000718 kfree(port);
Eric Dumazetd9351562011-05-20 14:59:23 -0400719 else
720 dev->priv_flags |= IFF_MACVLAN_PORT;
Jiri Pirkoab95bfe2010-06-01 21:52:08 +0000721 return err;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700722}
723
724static void macvlan_port_destroy(struct net_device *dev)
725{
Eric Dumazete052f7e2013-03-30 10:08:44 +0000726 struct macvlan_port *port = macvlan_port_get_rtnl(dev);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700727
Jiri Pirkoa35e2c12010-06-15 03:27:57 +0000728 dev->priv_flags &= ~IFF_MACVLAN_PORT;
Jiri Pirkoab95bfe2010-06-01 21:52:08 +0000729 netdev_rx_handler_unregister(dev);
Lai Jiangshan6e070ae2011-03-18 12:00:07 +0800730 kfree_rcu(port, rcu);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700731}
732
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700733static int macvlan_validate(struct nlattr *tb[], struct nlattr *data[])
734{
735 if (tb[IFLA_ADDRESS]) {
736 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
737 return -EINVAL;
738 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
739 return -EADDRNOTAVAIL;
740 }
Arnd Bergmann27c0b1a2009-11-26 06:07:11 +0000741
742 if (data && data[IFLA_MACVLAN_MODE]) {
743 switch (nla_get_u32(data[IFLA_MACVLAN_MODE])) {
744 case MACVLAN_MODE_PRIVATE:
745 case MACVLAN_MODE_VEPA:
746 case MACVLAN_MODE_BRIDGE:
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +0000747 case MACVLAN_MODE_PASSTHRU:
Arnd Bergmann27c0b1a2009-11-26 06:07:11 +0000748 break;
749 default:
750 return -EINVAL;
751 }
752 }
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700753 return 0;
754}
755
Arnd Bergmannfc0663d2010-01-30 12:23:40 +0000756int macvlan_common_newlink(struct net *src_net, struct net_device *dev,
757 struct nlattr *tb[], struct nlattr *data[],
758 int (*receive)(struct sk_buff *skb),
759 int (*forward)(struct net_device *dev,
760 struct sk_buff *skb))
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700761{
762 struct macvlan_dev *vlan = netdev_priv(dev);
763 struct macvlan_port *port;
764 struct net_device *lowerdev;
765 int err;
766
767 if (!tb[IFLA_LINK])
768 return -EINVAL;
769
Eric W. Biederman81adee42009-11-08 00:53:51 -0800770 lowerdev = __dev_get_by_index(src_net, nla_get_u32(tb[IFLA_LINK]));
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700771 if (lowerdev == NULL)
772 return -ENODEV;
773
Eric Biedermanb0832a22009-03-13 13:15:37 -0700774 /* When creating macvlans on top of other macvlans - use
775 * the real device as the lowerdev.
Patrick McHardya6ca5f12008-01-10 22:39:28 -0800776 */
Eric Biedermanb0832a22009-03-13 13:15:37 -0700777 if (lowerdev->rtnl_link_ops == dev->rtnl_link_ops) {
778 struct macvlan_dev *lowervlan = netdev_priv(lowerdev);
779 lowerdev = lowervlan->lowerdev;
780 }
Patrick McHardya6ca5f12008-01-10 22:39:28 -0800781
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700782 if (!tb[IFLA_MTU])
783 dev->mtu = lowerdev->mtu;
784 else if (dev->mtu > lowerdev->mtu)
785 return -EINVAL;
786
787 if (!tb[IFLA_ADDRESS])
Danny Kukawka7ce5d222012-02-15 06:45:40 +0000788 eth_hw_addr_random(dev);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700789
Jiri Pirkoa35e2c12010-06-15 03:27:57 +0000790 if (!macvlan_port_exists(lowerdev)) {
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700791 err = macvlan_port_create(lowerdev);
792 if (err < 0)
793 return err;
794 }
Eric Dumazete052f7e2013-03-30 10:08:44 +0000795 port = macvlan_port_get_rtnl(lowerdev);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700796
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +0000797 /* Only 1 macvlan device can be created in passthru mode */
798 if (port->passthru)
799 return -EINVAL;
800
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700801 vlan->lowerdev = lowerdev;
802 vlan->dev = dev;
803 vlan->port = port;
Arnd Bergmannfc0663d2010-01-30 12:23:40 +0000804 vlan->receive = receive;
805 vlan->forward = forward;
Vlad Yasevich2be5c762013-06-25 16:04:21 -0400806 vlan->set_features = MACVLAN_FEATURES;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700807
Arnd Bergmann27c0b1a2009-11-26 06:07:11 +0000808 vlan->mode = MACVLAN_MODE_VEPA;
809 if (data && data[IFLA_MACVLAN_MODE])
810 vlan->mode = nla_get_u32(data[IFLA_MACVLAN_MODE]);
811
John Fastabenddf8ef8f2012-04-15 06:44:37 +0000812 if (data && data[IFLA_MACVLAN_FLAGS])
813 vlan->flags = nla_get_u16(data[IFLA_MACVLAN_FLAGS]);
814
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +0000815 if (vlan->mode == MACVLAN_MODE_PASSTHRU) {
Eric W. Biedermand5cd92442011-03-21 18:22:22 -0700816 if (port->count)
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +0000817 return -EINVAL;
818 port->passthru = true;
819 memcpy(dev->dev_addr, lowerdev->dev_addr, ETH_ALEN);
820 }
821
Jiri Pirko7cd43db2013-01-03 22:48:50 +0000822 err = netdev_upper_dev_link(lowerdev, dev);
823 if (err)
824 goto destroy_port;
825
Eric W. Biedermand5cd92442011-03-21 18:22:22 -0700826 port->count += 1;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700827 err = register_netdevice(dev);
828 if (err < 0)
Jiri Pirko7cd43db2013-01-03 22:48:50 +0000829 goto upper_dev_unlink;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700830
Jiri Pirko233c7df2013-05-09 04:23:40 +0000831 list_add_tail_rcu(&vlan->list, &port->vlans);
Patrick Mullaneyfc4a7482009-12-03 15:59:22 -0800832 netif_stacked_transfer_operstate(lowerdev, dev);
Jiri Pirkof16d3d52010-05-24 07:02:25 +0000833
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700834 return 0;
Jiri Pirkof16d3d52010-05-24 07:02:25 +0000835
Jiri Pirko7cd43db2013-01-03 22:48:50 +0000836upper_dev_unlink:
837 netdev_upper_dev_unlink(lowerdev, dev);
Jiri Pirkof16d3d52010-05-24 07:02:25 +0000838destroy_port:
Eric W. Biedermand5cd92442011-03-21 18:22:22 -0700839 port->count -= 1;
840 if (!port->count)
Jiri Pirkof16d3d52010-05-24 07:02:25 +0000841 macvlan_port_destroy(lowerdev);
842
843 return err;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700844}
Arnd Bergmannfc0663d2010-01-30 12:23:40 +0000845EXPORT_SYMBOL_GPL(macvlan_common_newlink);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700846
Arnd Bergmannfc0663d2010-01-30 12:23:40 +0000847static int macvlan_newlink(struct net *src_net, struct net_device *dev,
848 struct nlattr *tb[], struct nlattr *data[])
849{
850 return macvlan_common_newlink(src_net, dev, tb, data,
851 netif_rx,
852 dev_forward_skb);
853}
854
855void macvlan_dellink(struct net_device *dev, struct list_head *head)
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700856{
857 struct macvlan_dev *vlan = netdev_priv(dev);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700858
Jiri Pirko233c7df2013-05-09 04:23:40 +0000859 list_del_rcu(&vlan->list);
Eric Dumazet23289a32009-10-27 07:06:36 +0000860 unregister_netdevice_queue(dev, head);
Jiri Pirko7cd43db2013-01-03 22:48:50 +0000861 netdev_upper_dev_unlink(vlan->lowerdev, dev);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700862}
Arnd Bergmannfc0663d2010-01-30 12:23:40 +0000863EXPORT_SYMBOL_GPL(macvlan_dellink);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700864
Arnd Bergmann27c0b1a2009-11-26 06:07:11 +0000865static int macvlan_changelink(struct net_device *dev,
866 struct nlattr *tb[], struct nlattr *data[])
867{
868 struct macvlan_dev *vlan = netdev_priv(dev);
Michael S. Tsirkin266e8342013-08-01 13:43:19 +0300869 enum macvlan_mode mode;
870 bool set_mode = false;
871
872 /* Validate mode, but don't set yet: setting flags may fail. */
873 if (data && data[IFLA_MACVLAN_MODE]) {
874 set_mode = true;
875 mode = nla_get_u32(data[IFLA_MACVLAN_MODE]);
876 /* Passthrough mode can't be set or cleared dynamically */
877 if ((mode == MACVLAN_MODE_PASSTHRU) !=
878 (vlan->mode == MACVLAN_MODE_PASSTHRU))
879 return -EINVAL;
880 }
Michael S. Tsirkin99ffc3e2013-06-13 10:07:29 +0300881
John Fastabenddf8ef8f2012-04-15 06:44:37 +0000882 if (data && data[IFLA_MACVLAN_FLAGS]) {
883 __u16 flags = nla_get_u16(data[IFLA_MACVLAN_FLAGS]);
884 bool promisc = (flags ^ vlan->flags) & MACVLAN_FLAG_NOPROMISC;
Michael S. Tsirkin99ffc3e2013-06-13 10:07:29 +0300885 if (vlan->port->passthru && promisc) {
886 int err;
John Fastabenddf8ef8f2012-04-15 06:44:37 +0000887
Michael S. Tsirkin99ffc3e2013-06-13 10:07:29 +0300888 if (flags & MACVLAN_FLAG_NOPROMISC)
889 err = dev_set_promiscuity(vlan->lowerdev, -1);
890 else
891 err = dev_set_promiscuity(vlan->lowerdev, 1);
892 if (err < 0)
893 return err;
894 }
John Fastabenddf8ef8f2012-04-15 06:44:37 +0000895 vlan->flags = flags;
896 }
Michael S. Tsirkin266e8342013-08-01 13:43:19 +0300897 if (set_mode)
898 vlan->mode = mode;
Arnd Bergmann27c0b1a2009-11-26 06:07:11 +0000899 return 0;
900}
901
902static size_t macvlan_get_size(const struct net_device *dev)
903{
Eric Dumazet01fe9442013-01-17 13:30:49 -0800904 return (0
905 + nla_total_size(4) /* IFLA_MACVLAN_MODE */
906 + nla_total_size(2) /* IFLA_MACVLAN_FLAGS */
907 );
Arnd Bergmann27c0b1a2009-11-26 06:07:11 +0000908}
909
910static int macvlan_fill_info(struct sk_buff *skb,
911 const struct net_device *dev)
912{
913 struct macvlan_dev *vlan = netdev_priv(dev);
914
David S. Milleread9a762012-04-01 20:23:06 -0400915 if (nla_put_u32(skb, IFLA_MACVLAN_MODE, vlan->mode))
916 goto nla_put_failure;
John Fastabenddf8ef8f2012-04-15 06:44:37 +0000917 if (nla_put_u16(skb, IFLA_MACVLAN_FLAGS, vlan->flags))
918 goto nla_put_failure;
Arnd Bergmann27c0b1a2009-11-26 06:07:11 +0000919 return 0;
920
921nla_put_failure:
922 return -EMSGSIZE;
923}
924
925static const struct nla_policy macvlan_policy[IFLA_MACVLAN_MAX + 1] = {
John Fastabenddf8ef8f2012-04-15 06:44:37 +0000926 [IFLA_MACVLAN_MODE] = { .type = NLA_U32 },
927 [IFLA_MACVLAN_FLAGS] = { .type = NLA_U16 },
Arnd Bergmann27c0b1a2009-11-26 06:07:11 +0000928};
929
Arnd Bergmannfc0663d2010-01-30 12:23:40 +0000930int macvlan_link_register(struct rtnl_link_ops *ops)
931{
932 /* common fields */
933 ops->priv_size = sizeof(struct macvlan_dev);
Arnd Bergmannfc0663d2010-01-30 12:23:40 +0000934 ops->validate = macvlan_validate;
935 ops->maxtype = IFLA_MACVLAN_MAX;
936 ops->policy = macvlan_policy;
937 ops->changelink = macvlan_changelink;
938 ops->get_size = macvlan_get_size;
939 ops->fill_info = macvlan_fill_info;
940
941 return rtnl_link_register(ops);
942};
943EXPORT_SYMBOL_GPL(macvlan_link_register);
944
945static struct rtnl_link_ops macvlan_link_ops = {
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700946 .kind = "macvlan",
Herbert Xu8a357472010-07-21 21:44:31 +0000947 .setup = macvlan_setup,
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700948 .newlink = macvlan_newlink,
949 .dellink = macvlan_dellink,
950};
951
952static int macvlan_device_event(struct notifier_block *unused,
953 unsigned long event, void *ptr)
954{
Jiri Pirko351638e2013-05-28 01:30:21 +0000955 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700956 struct macvlan_dev *vlan, *next;
957 struct macvlan_port *port;
Eric Dumazet226bd342011-05-08 23:17:57 +0000958 LIST_HEAD(list_kill);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700959
Jiri Pirkoa35e2c12010-06-15 03:27:57 +0000960 if (!macvlan_port_exists(dev))
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700961 return NOTIFY_DONE;
962
Eric Dumazete052f7e2013-03-30 10:08:44 +0000963 port = macvlan_port_get_rtnl(dev);
Jiri Pirkoa35e2c12010-06-15 03:27:57 +0000964
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700965 switch (event) {
966 case NETDEV_CHANGE:
967 list_for_each_entry(vlan, &port->vlans, list)
Patrick Mullaneyfc4a7482009-12-03 15:59:22 -0800968 netif_stacked_transfer_operstate(vlan->lowerdev,
969 vlan->dev);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700970 break;
971 case NETDEV_FEAT_CHANGE:
972 list_for_each_entry(vlan, &port->vlans, list) {
973 vlan->dev->features = dev->features & MACVLAN_FEATURES;
Patrick McHardy8c2acc52009-11-23 14:18:53 -0800974 vlan->dev->gso_max_size = dev->gso_max_size;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700975 netdev_features_change(vlan->dev);
976 }
977 break;
978 case NETDEV_UNREGISTER:
David Lamparter3b27e102010-09-17 03:22:19 +0000979 /* twiddle thumbs on netns device moves */
980 if (dev->reg_state != NETREG_UNREGISTERING)
981 break;
982
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700983 list_for_each_entry_safe(vlan, next, &port->vlans, list)
Eric Dumazet226bd342011-05-08 23:17:57 +0000984 vlan->dev->rtnl_link_ops->dellink(vlan->dev, &list_kill);
985 unregister_netdevice_many(&list_kill);
986 list_del(&list_kill);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700987 break;
Jiri Pirko1c01fe12010-03-10 10:30:19 +0000988 case NETDEV_PRE_TYPE_CHANGE:
989 /* Forbid underlaying device to change its type. */
990 return NOTIFY_BAD;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700991 }
992 return NOTIFY_DONE;
993}
994
995static struct notifier_block macvlan_notifier_block __read_mostly = {
996 .notifier_call = macvlan_device_event,
997};
998
999static int __init macvlan_init_module(void)
1000{
1001 int err;
1002
1003 register_netdevice_notifier(&macvlan_notifier_block);
Patrick McHardyb863ceb2007-07-14 18:55:06 -07001004
Arnd Bergmannfc0663d2010-01-30 12:23:40 +00001005 err = macvlan_link_register(&macvlan_link_ops);
Patrick McHardyb863ceb2007-07-14 18:55:06 -07001006 if (err < 0)
1007 goto err1;
1008 return 0;
1009err1:
Patrick McHardyb863ceb2007-07-14 18:55:06 -07001010 unregister_netdevice_notifier(&macvlan_notifier_block);
1011 return err;
1012}
1013
1014static void __exit macvlan_cleanup_module(void)
1015{
1016 rtnl_link_unregister(&macvlan_link_ops);
Patrick McHardyb863ceb2007-07-14 18:55:06 -07001017 unregister_netdevice_notifier(&macvlan_notifier_block);
1018}
1019
1020module_init(macvlan_init_module);
1021module_exit(macvlan_cleanup_module);
1022
1023MODULE_LICENSE("GPL");
1024MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>");
1025MODULE_DESCRIPTION("Driver for MAC address based VLANs");
1026MODULE_ALIAS_RTNL_LINK("macvlan");