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Patrick McHardyb863ceb2007-07-14 18:55:06 -07001/*
2 * Copyright (c) 2007 Patrick McHardy <kaber@trash.net>
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License as
6 * published by the Free Software Foundation; either version 2 of
7 * the License, or (at your option) any later version.
8 *
9 * The code this is based on carried the following copyright notice:
10 * ---
11 * (C) Copyright 2001-2006
12 * Alex Zeffertt, Cambridge Broadband Ltd, ajz@cambridgebroadband.com
13 * Re-worked by Ben Greear <greearb@candelatech.com>
14 * ---
15 */
16#include <linux/kernel.h>
17#include <linux/types.h>
18#include <linux/module.h>
19#include <linux/init.h>
20#include <linux/errno.h>
21#include <linux/slab.h>
22#include <linux/string.h>
Franck Bui-Huu82524742008-05-12 21:21:05 +020023#include <linux/rculist.h>
Patrick McHardyb863ceb2007-07-14 18:55:06 -070024#include <linux/notifier.h>
25#include <linux/netdevice.h>
26#include <linux/etherdevice.h>
27#include <linux/ethtool.h>
28#include <linux/if_arp.h>
Jiri Pirko87002b02011-12-08 04:11:17 +000029#include <linux/if_vlan.h>
Patrick McHardyb863ceb2007-07-14 18:55:06 -070030#include <linux/if_link.h>
31#include <linux/if_macvlan.h>
32#include <net/rtnetlink.h>
Arnd Bergmann618e1b72009-11-26 06:07:10 +000033#include <net/xfrm.h>
Patrick McHardyb863ceb2007-07-14 18:55:06 -070034
35#define MACVLAN_HASH_SIZE (1 << BITS_PER_BYTE)
36
37struct macvlan_port {
38 struct net_device *dev;
39 struct hlist_head vlan_hash[MACVLAN_HASH_SIZE];
40 struct list_head vlans;
Jiri Pirko8b37ef02010-06-07 01:36:29 +000041 struct rcu_head rcu;
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +000042 bool passthru;
Eric W. Biedermand5cd92442011-03-21 18:22:22 -070043 int count;
Patrick McHardyb863ceb2007-07-14 18:55:06 -070044};
45
Eric W. Biedermand5cd92442011-03-21 18:22:22 -070046static void macvlan_port_destroy(struct net_device *dev);
47
Jiri Pirkoa35e2c12010-06-15 03:27:57 +000048#define macvlan_port_get_rcu(dev) \
49 ((struct macvlan_port *) rcu_dereference(dev->rx_handler_data))
50#define macvlan_port_get(dev) ((struct macvlan_port *) dev->rx_handler_data)
51#define macvlan_port_exists(dev) (dev->priv_flags & IFF_MACVLAN_PORT)
52
Patrick McHardyb863ceb2007-07-14 18:55:06 -070053static struct macvlan_dev *macvlan_hash_lookup(const struct macvlan_port *port,
54 const unsigned char *addr)
55{
56 struct macvlan_dev *vlan;
57 struct hlist_node *n;
58
59 hlist_for_each_entry_rcu(vlan, n, &port->vlan_hash[addr[5]], hlist) {
Joe Perchesa6700db2012-05-09 17:04:04 +000060 if (ether_addr_equal_64bits(vlan->dev->dev_addr, addr))
Patrick McHardyb863ceb2007-07-14 18:55:06 -070061 return vlan;
62 }
63 return NULL;
64}
65
Eric Biedermanf9ac30f2009-03-13 13:16:13 -070066static void macvlan_hash_add(struct macvlan_dev *vlan)
67{
68 struct macvlan_port *port = vlan->port;
69 const unsigned char *addr = vlan->dev->dev_addr;
70
71 hlist_add_head_rcu(&vlan->hlist, &port->vlan_hash[addr[5]]);
72}
73
Eric Dumazet449f4542011-05-19 12:24:16 +000074static void macvlan_hash_del(struct macvlan_dev *vlan, bool sync)
Eric Biedermanf9ac30f2009-03-13 13:16:13 -070075{
76 hlist_del_rcu(&vlan->hlist);
Eric Dumazet449f4542011-05-19 12:24:16 +000077 if (sync)
78 synchronize_rcu();
Eric Biedermanf9ac30f2009-03-13 13:16:13 -070079}
80
81static void macvlan_hash_change_addr(struct macvlan_dev *vlan,
82 const unsigned char *addr)
83{
Eric Dumazet449f4542011-05-19 12:24:16 +000084 macvlan_hash_del(vlan, true);
Eric Biedermanf9ac30f2009-03-13 13:16:13 -070085 /* Now that we are unhashed it is safe to change the device
86 * address without confusing packet delivery.
87 */
88 memcpy(vlan->dev->dev_addr, addr, ETH_ALEN);
89 macvlan_hash_add(vlan);
90}
91
92static int macvlan_addr_busy(const struct macvlan_port *port,
93 const unsigned char *addr)
94{
95 /* Test to see if the specified multicast address is
96 * currently in use by the underlying device or
97 * another macvlan.
98 */
Joe Perchesa6700db2012-05-09 17:04:04 +000099 if (ether_addr_equal_64bits(port->dev->dev_addr, addr))
Eric Biedermanf9ac30f2009-03-13 13:16:13 -0700100 return 1;
101
102 if (macvlan_hash_lookup(port, addr))
103 return 1;
104
105 return 0;
106}
107
Arnd Bergmanna1e514c2009-11-26 06:07:09 +0000108
Arnd Bergmannfc0663d2010-01-30 12:23:40 +0000109static int macvlan_broadcast_one(struct sk_buff *skb,
110 const struct macvlan_dev *vlan,
Arnd Bergmann618e1b72009-11-26 06:07:10 +0000111 const struct ethhdr *eth, bool local)
Arnd Bergmanna1e514c2009-11-26 06:07:09 +0000112{
Arnd Bergmannfc0663d2010-01-30 12:23:40 +0000113 struct net_device *dev = vlan->dev;
Arnd Bergmanna1e514c2009-11-26 06:07:09 +0000114 if (!skb)
115 return NET_RX_DROP;
116
Arnd Bergmann618e1b72009-11-26 06:07:10 +0000117 if (local)
Arnd Bergmannfc0663d2010-01-30 12:23:40 +0000118 return vlan->forward(dev, skb);
Arnd Bergmann618e1b72009-11-26 06:07:10 +0000119
Arnd Bergmanna1e514c2009-11-26 06:07:09 +0000120 skb->dev = dev;
Joe Perchesa6700db2012-05-09 17:04:04 +0000121 if (ether_addr_equal_64bits(eth->h_dest, dev->broadcast))
Arnd Bergmanna1e514c2009-11-26 06:07:09 +0000122 skb->pkt_type = PACKET_BROADCAST;
123 else
124 skb->pkt_type = PACKET_MULTICAST;
125
Arnd Bergmannfc0663d2010-01-30 12:23:40 +0000126 return vlan->receive(skb);
Arnd Bergmanna1e514c2009-11-26 06:07:09 +0000127}
128
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700129static void macvlan_broadcast(struct sk_buff *skb,
Arnd Bergmann618e1b72009-11-26 06:07:10 +0000130 const struct macvlan_port *port,
131 struct net_device *src,
132 enum macvlan_mode mode)
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700133{
134 const struct ethhdr *eth = eth_hdr(skb);
135 const struct macvlan_dev *vlan;
136 struct hlist_node *n;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700137 struct sk_buff *nskb;
138 unsigned int i;
Arnd Bergmanna1e514c2009-11-26 06:07:09 +0000139 int err;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700140
Patrick McHardyefbbced2008-11-26 15:30:48 -0800141 if (skb->protocol == htons(ETH_P_PAUSE))
142 return;
143
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700144 for (i = 0; i < MACVLAN_HASH_SIZE; i++) {
145 hlist_for_each_entry_rcu(vlan, n, &port->vlan_hash[i], hlist) {
Arnd Bergmann618e1b72009-11-26 06:07:10 +0000146 if (vlan->dev == src || !(vlan->mode & mode))
147 continue;
148
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700149 nskb = skb_clone(skb, GFP_ATOMIC);
Arnd Bergmannfc0663d2010-01-30 12:23:40 +0000150 err = macvlan_broadcast_one(nskb, vlan, eth,
Arnd Bergmann618e1b72009-11-26 06:07:10 +0000151 mode == MACVLAN_MODE_BRIDGE);
Arnd Bergmanna1e514c2009-11-26 06:07:09 +0000152 macvlan_count_rx(vlan, skb->len + ETH_HLEN,
153 err == NET_RX_SUCCESS, 1);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700154 }
155 }
156}
157
158/* called under rcu_read_lock() from netif_receive_skb */
Jiri Pirko8a4eb572011-03-12 03:14:39 +0000159static rx_handler_result_t macvlan_handle_frame(struct sk_buff **pskb)
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700160{
Jiri Pirkoab95bfe2010-06-01 21:52:08 +0000161 struct macvlan_port *port;
Jiri Pirko8a4eb572011-03-12 03:14:39 +0000162 struct sk_buff *skb = *pskb;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700163 const struct ethhdr *eth = eth_hdr(skb);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700164 const struct macvlan_dev *vlan;
Arnd Bergmann618e1b72009-11-26 06:07:10 +0000165 const struct macvlan_dev *src;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700166 struct net_device *dev;
Sridhar Samudralaba018772010-07-27 09:10:07 +0000167 unsigned int len = 0;
168 int ret = NET_RX_DROP;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700169
Jiri Pirkoa35e2c12010-06-15 03:27:57 +0000170 port = macvlan_port_get_rcu(skb->dev);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700171 if (is_multicast_ether_addr(eth->h_dest)) {
Eric Dumazetbc416d92011-10-06 10:28:31 +0000172 skb = ip_check_defrag(skb, IP_DEFRAG_MACVLAN);
173 if (!skb)
174 return RX_HANDLER_CONSUMED;
Eric Dumazet4ec7ac12012-01-23 05:38:59 +0000175 eth = eth_hdr(skb);
Arnd Bergmann618e1b72009-11-26 06:07:10 +0000176 src = macvlan_hash_lookup(port, eth->h_source);
177 if (!src)
178 /* frame comes from an external address */
179 macvlan_broadcast(skb, port, NULL,
180 MACVLAN_MODE_PRIVATE |
181 MACVLAN_MODE_VEPA |
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +0000182 MACVLAN_MODE_PASSTHRU|
Arnd Bergmann618e1b72009-11-26 06:07:10 +0000183 MACVLAN_MODE_BRIDGE);
184 else if (src->mode == MACVLAN_MODE_VEPA)
185 /* flood to everyone except source */
186 macvlan_broadcast(skb, port, src->dev,
187 MACVLAN_MODE_VEPA |
188 MACVLAN_MODE_BRIDGE);
189 else if (src->mode == MACVLAN_MODE_BRIDGE)
190 /*
191 * flood only to VEPA ports, bridge ports
192 * already saw the frame on the way out.
193 */
194 macvlan_broadcast(skb, port, src->dev,
195 MACVLAN_MODE_VEPA);
stephen hemminger729e72a2011-11-02 12:11:53 +0000196 else {
197 /* forward to original port. */
198 vlan = src;
199 ret = macvlan_broadcast_one(skb, vlan, eth, 0);
200 goto out;
201 }
202
Jiri Pirko8a4eb572011-03-12 03:14:39 +0000203 return RX_HANDLER_PASS;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700204 }
205
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +0000206 if (port->passthru)
207 vlan = list_first_entry(&port->vlans, struct macvlan_dev, list);
208 else
209 vlan = macvlan_hash_lookup(port, eth->h_dest);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700210 if (vlan == NULL)
Jiri Pirko8a4eb572011-03-12 03:14:39 +0000211 return RX_HANDLER_PASS;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700212
213 dev = vlan->dev;
214 if (unlikely(!(dev->flags & IFF_UP))) {
215 kfree_skb(skb);
Jiri Pirko8a4eb572011-03-12 03:14:39 +0000216 return RX_HANDLER_CONSUMED;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700217 }
Arnd Bergmanna1e514c2009-11-26 06:07:09 +0000218 len = skb->len + ETH_HLEN;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700219 skb = skb_share_check(skb, GFP_ATOMIC);
Arnd Bergmanna1e514c2009-11-26 06:07:09 +0000220 if (!skb)
Sridhar Samudralaba018772010-07-27 09:10:07 +0000221 goto out;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700222
223 skb->dev = dev;
224 skb->pkt_type = PACKET_HOST;
225
Sridhar Samudralaba018772010-07-27 09:10:07 +0000226 ret = vlan->receive(skb);
227
228out:
229 macvlan_count_rx(vlan, len, ret == NET_RX_SUCCESS, 0);
Jiri Pirko8a4eb572011-03-12 03:14:39 +0000230 return RX_HANDLER_CONSUMED;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700231}
232
Arnd Bergmann618e1b72009-11-26 06:07:10 +0000233static int macvlan_queue_xmit(struct sk_buff *skb, struct net_device *dev)
234{
235 const struct macvlan_dev *vlan = netdev_priv(dev);
236 const struct macvlan_port *port = vlan->port;
237 const struct macvlan_dev *dest;
Daniel Lezcano12a28562011-03-14 06:08:07 +0000238 __u8 ip_summed = skb->ip_summed;
Arnd Bergmann618e1b72009-11-26 06:07:10 +0000239
240 if (vlan->mode == MACVLAN_MODE_BRIDGE) {
241 const struct ethhdr *eth = (void *)skb->data;
Daniel Lezcano12a28562011-03-14 06:08:07 +0000242 skb->ip_summed = CHECKSUM_UNNECESSARY;
Arnd Bergmann618e1b72009-11-26 06:07:10 +0000243
244 /* send to other bridge ports directly */
245 if (is_multicast_ether_addr(eth->h_dest)) {
246 macvlan_broadcast(skb, port, dev, MACVLAN_MODE_BRIDGE);
247 goto xmit_world;
248 }
249
250 dest = macvlan_hash_lookup(port, eth->h_dest);
251 if (dest && dest->mode == MACVLAN_MODE_BRIDGE) {
David Warda37dd332011-05-19 02:53:20 +0000252 /* send to lowerdev first for its network taps */
David Wardcb2d0f32011-09-18 12:53:20 +0000253 dev_forward_skb(vlan->lowerdev, skb);
Arnd Bergmann618e1b72009-11-26 06:07:10 +0000254
255 return NET_XMIT_SUCCESS;
256 }
257 }
258
259xmit_world:
Daniel Lezcano12a28562011-03-14 06:08:07 +0000260 skb->ip_summed = ip_summed;
David S. Miller59b99972012-05-10 23:03:34 -0400261 skb->dev = vlan->lowerdev;
Arnd Bergmann618e1b72009-11-26 06:07:10 +0000262 return dev_queue_xmit(skb);
263}
264
Arnd Bergmannfc0663d2010-01-30 12:23:40 +0000265netdev_tx_t macvlan_start_xmit(struct sk_buff *skb,
266 struct net_device *dev)
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700267{
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700268 unsigned int len = skb->len;
269 int ret;
Eric Dumazet8ffab512010-11-10 21:14:04 +0000270 const struct macvlan_dev *vlan = netdev_priv(dev);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700271
Arnd Bergmann618e1b72009-11-26 06:07:10 +0000272 ret = macvlan_queue_xmit(skb, dev);
Eric Dumazet2d6c9ff2010-05-10 04:51:02 +0000273 if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) {
Eric Dumazet8ffab512010-11-10 21:14:04 +0000274 struct macvlan_pcpu_stats *pcpu_stats;
Eric Dumazet2c114552009-09-03 00:11:45 +0000275
Eric Dumazet8ffab512010-11-10 21:14:04 +0000276 pcpu_stats = this_cpu_ptr(vlan->pcpu_stats);
277 u64_stats_update_begin(&pcpu_stats->syncp);
278 pcpu_stats->tx_packets++;
279 pcpu_stats->tx_bytes += len;
280 u64_stats_update_end(&pcpu_stats->syncp);
281 } else {
282 this_cpu_inc(vlan->pcpu_stats->tx_dropped);
283 }
Patrick McHardycbbef5e2009-11-10 06:14:24 +0000284 return ret;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700285}
Arnd Bergmannfc0663d2010-01-30 12:23:40 +0000286EXPORT_SYMBOL_GPL(macvlan_start_xmit);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700287
288static int macvlan_hard_header(struct sk_buff *skb, struct net_device *dev,
Stephen Hemminger3b04ddd2007-10-09 01:40:57 -0700289 unsigned short type, const void *daddr,
290 const void *saddr, unsigned len)
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700291{
292 const struct macvlan_dev *vlan = netdev_priv(dev);
293 struct net_device *lowerdev = vlan->lowerdev;
294
Stephen Hemminger0c4e8582007-10-09 01:36:32 -0700295 return dev_hard_header(skb, lowerdev, type, daddr,
296 saddr ? : dev->dev_addr, len);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700297}
298
Stephen Hemminger3b04ddd2007-10-09 01:40:57 -0700299static const struct header_ops macvlan_hard_header_ops = {
300 .create = macvlan_hard_header,
301 .rebuild = eth_rebuild_header,
302 .parse = eth_header_parse,
Stephen Hemminger3b04ddd2007-10-09 01:40:57 -0700303 .cache = eth_header_cache,
304 .cache_update = eth_header_cache_update,
305};
306
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700307static int macvlan_open(struct net_device *dev)
308{
309 struct macvlan_dev *vlan = netdev_priv(dev);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700310 struct net_device *lowerdev = vlan->lowerdev;
311 int err;
312
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +0000313 if (vlan->port->passthru) {
John Fastabenddf8ef8f2012-04-15 06:44:37 +0000314 if (!(vlan->flags & MACVLAN_FLAG_NOPROMISC))
315 dev_set_promiscuity(lowerdev, 1);
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +0000316 goto hash_add;
317 }
318
Eric Biedermanf9ac30f2009-03-13 13:16:13 -0700319 err = -EBUSY;
320 if (macvlan_addr_busy(vlan->port, dev->dev_addr))
321 goto out;
322
Jiri Pirkoa748ee22010-04-01 21:22:09 +0000323 err = dev_uc_add(lowerdev, dev->dev_addr);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700324 if (err < 0)
Wang Chenb89fb7d2008-07-14 20:57:07 -0700325 goto out;
326 if (dev->flags & IFF_ALLMULTI) {
327 err = dev_set_allmulti(lowerdev, 1);
328 if (err < 0)
329 goto del_unicast;
330 }
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +0000331
332hash_add:
Eric Biedermanf9ac30f2009-03-13 13:16:13 -0700333 macvlan_hash_add(vlan);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700334 return 0;
Wang Chenb89fb7d2008-07-14 20:57:07 -0700335
336del_unicast:
Jiri Pirkoa748ee22010-04-01 21:22:09 +0000337 dev_uc_del(lowerdev, dev->dev_addr);
Wang Chenb89fb7d2008-07-14 20:57:07 -0700338out:
339 return err;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700340}
341
342static int macvlan_stop(struct net_device *dev)
343{
344 struct macvlan_dev *vlan = netdev_priv(dev);
345 struct net_device *lowerdev = vlan->lowerdev;
346
John Fastabenddf8ef8f2012-04-15 06:44:37 +0000347 dev_uc_unsync(lowerdev, dev);
348 dev_mc_unsync(lowerdev, dev);
349
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +0000350 if (vlan->port->passthru) {
John Fastabenddf8ef8f2012-04-15 06:44:37 +0000351 if (!(vlan->flags & MACVLAN_FLAG_NOPROMISC))
352 dev_set_promiscuity(lowerdev, -1);
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +0000353 goto hash_del;
354 }
355
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700356 if (dev->flags & IFF_ALLMULTI)
357 dev_set_allmulti(lowerdev, -1);
358
Jiri Pirkoa748ee22010-04-01 21:22:09 +0000359 dev_uc_del(lowerdev, dev->dev_addr);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700360
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +0000361hash_del:
Eric Dumazet449f4542011-05-19 12:24:16 +0000362 macvlan_hash_del(vlan, !dev->dismantle);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700363 return 0;
364}
365
Patrick McHardyad5d20a2007-11-19 22:00:42 -0800366static int macvlan_set_mac_address(struct net_device *dev, void *p)
367{
368 struct macvlan_dev *vlan = netdev_priv(dev);
369 struct net_device *lowerdev = vlan->lowerdev;
370 struct sockaddr *addr = p;
371 int err;
372
373 if (!is_valid_ether_addr(addr->sa_data))
374 return -EADDRNOTAVAIL;
375
Eric Biedermanf9ac30f2009-03-13 13:16:13 -0700376 if (!(dev->flags & IFF_UP)) {
377 /* Just copy in the new address */
Danny Kukawka7ce5d222012-02-15 06:45:40 +0000378 dev->addr_assign_type &= ~NET_ADDR_RANDOM;
Eric Biedermanf9ac30f2009-03-13 13:16:13 -0700379 memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN);
380 } else {
381 /* Rehash and update the device filters */
382 if (macvlan_addr_busy(vlan->port, addr->sa_data))
383 return -EBUSY;
Patrick McHardyad5d20a2007-11-19 22:00:42 -0800384
Jiri Pirkoa748ee22010-04-01 21:22:09 +0000385 err = dev_uc_add(lowerdev, addr->sa_data);
Jiri Pirkoccffad252009-05-22 23:22:17 +0000386 if (err)
Eric Biedermanf9ac30f2009-03-13 13:16:13 -0700387 return err;
Patrick McHardyad5d20a2007-11-19 22:00:42 -0800388
Jiri Pirkoa748ee22010-04-01 21:22:09 +0000389 dev_uc_del(lowerdev, dev->dev_addr);
Eric Biedermanf9ac30f2009-03-13 13:16:13 -0700390
391 macvlan_hash_change_addr(vlan, addr->sa_data);
392 }
Patrick McHardyad5d20a2007-11-19 22:00:42 -0800393 return 0;
394}
395
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700396static void macvlan_change_rx_flags(struct net_device *dev, int change)
397{
398 struct macvlan_dev *vlan = netdev_priv(dev);
399 struct net_device *lowerdev = vlan->lowerdev;
400
401 if (change & IFF_ALLMULTI)
402 dev_set_allmulti(lowerdev, dev->flags & IFF_ALLMULTI ? 1 : -1);
403}
404
John Fastabenddf8ef8f2012-04-15 06:44:37 +0000405static void macvlan_set_mac_lists(struct net_device *dev)
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700406{
407 struct macvlan_dev *vlan = netdev_priv(dev);
408
John Fastabenddf8ef8f2012-04-15 06:44:37 +0000409 dev_uc_sync(vlan->lowerdev, dev);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700410 dev_mc_sync(vlan->lowerdev, dev);
411}
412
413static int macvlan_change_mtu(struct net_device *dev, int new_mtu)
414{
415 struct macvlan_dev *vlan = netdev_priv(dev);
416
417 if (new_mtu < 68 || vlan->lowerdev->mtu < new_mtu)
418 return -EINVAL;
419 dev->mtu = new_mtu;
420 return 0;
421}
422
423/*
424 * macvlan network devices have devices nesting below it and are a special
425 * "super class" of normal network devices; split their locks off into a
426 * separate class since they always nest.
427 */
428static struct lock_class_key macvlan_netdev_xmit_lock_key;
David S. Millercf508b12008-07-22 14:16:42 -0700429static struct lock_class_key macvlan_netdev_addr_lock_key;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700430
431#define MACVLAN_FEATURES \
432 (NETIF_F_SG | NETIF_F_ALL_CSUM | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST | \
433 NETIF_F_GSO | NETIF_F_TSO | NETIF_F_UFO | NETIF_F_GSO_ROBUST | \
John Fastabend8d13e672011-06-06 04:27:16 +0000434 NETIF_F_TSO_ECN | NETIF_F_TSO6 | NETIF_F_GRO | NETIF_F_RXCSUM | \
435 NETIF_F_HW_VLAN_FILTER)
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700436
437#define MACVLAN_STATE_MASK \
438 ((1<<__LINK_STATE_NOCARRIER) | (1<<__LINK_STATE_DORMANT))
439
David S. Millere8a04642008-07-17 00:34:19 -0700440static void macvlan_set_lockdep_class_one(struct net_device *dev,
441 struct netdev_queue *txq,
442 void *_unused)
David S. Millerc773e842008-07-08 23:13:53 -0700443{
444 lockdep_set_class(&txq->_xmit_lock,
445 &macvlan_netdev_xmit_lock_key);
446}
447
448static void macvlan_set_lockdep_class(struct net_device *dev)
449{
David S. Millercf508b12008-07-22 14:16:42 -0700450 lockdep_set_class(&dev->addr_list_lock,
451 &macvlan_netdev_addr_lock_key);
David S. Millere8a04642008-07-17 00:34:19 -0700452 netdev_for_each_tx_queue(dev, macvlan_set_lockdep_class_one, NULL);
David S. Millerc773e842008-07-08 23:13:53 -0700453}
454
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700455static int macvlan_init(struct net_device *dev)
456{
457 struct macvlan_dev *vlan = netdev_priv(dev);
458 const struct net_device *lowerdev = vlan->lowerdev;
459
460 dev->state = (dev->state & ~MACVLAN_STATE_MASK) |
461 (lowerdev->state & MACVLAN_STATE_MASK);
462 dev->features = lowerdev->features & MACVLAN_FEATURES;
Eric Dumazet8ffab512010-11-10 21:14:04 +0000463 dev->features |= NETIF_F_LLTX;
Patrick McHardy8c2acc52009-11-23 14:18:53 -0800464 dev->gso_max_size = lowerdev->gso_max_size;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700465 dev->iflink = lowerdev->ifindex;
sg.tweak@gmail.comef5c8992009-06-10 09:55:02 +0000466 dev->hard_header_len = lowerdev->hard_header_len;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700467
David S. Millerc773e842008-07-08 23:13:53 -0700468 macvlan_set_lockdep_class(dev);
469
Eric Dumazet8ffab512010-11-10 21:14:04 +0000470 vlan->pcpu_stats = alloc_percpu(struct macvlan_pcpu_stats);
471 if (!vlan->pcpu_stats)
Eric Dumazetfccaf712009-11-17 08:53:49 +0000472 return -ENOMEM;
473
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700474 return 0;
475}
476
Eric Dumazetfccaf712009-11-17 08:53:49 +0000477static void macvlan_uninit(struct net_device *dev)
478{
479 struct macvlan_dev *vlan = netdev_priv(dev);
Eric W. Biedermand5cd92442011-03-21 18:22:22 -0700480 struct macvlan_port *port = vlan->port;
Eric Dumazetfccaf712009-11-17 08:53:49 +0000481
Eric Dumazet8ffab512010-11-10 21:14:04 +0000482 free_percpu(vlan->pcpu_stats);
Eric W. Biedermand5cd92442011-03-21 18:22:22 -0700483
484 port->count -= 1;
485 if (!port->count)
486 macvlan_port_destroy(port->dev);
Eric Dumazetfccaf712009-11-17 08:53:49 +0000487}
488
Eric Dumazet28172732010-07-07 14:58:56 -0700489static struct rtnl_link_stats64 *macvlan_dev_get_stats64(struct net_device *dev,
490 struct rtnl_link_stats64 *stats)
Eric Dumazetfccaf712009-11-17 08:53:49 +0000491{
Eric Dumazetfccaf712009-11-17 08:53:49 +0000492 struct macvlan_dev *vlan = netdev_priv(dev);
493
Eric Dumazet8ffab512010-11-10 21:14:04 +0000494 if (vlan->pcpu_stats) {
495 struct macvlan_pcpu_stats *p;
496 u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes;
497 u32 rx_errors = 0, tx_dropped = 0;
Eric Dumazetbc661542010-06-24 00:54:21 +0000498 unsigned int start;
Eric Dumazetfccaf712009-11-17 08:53:49 +0000499 int i;
500
501 for_each_possible_cpu(i) {
Eric Dumazet8ffab512010-11-10 21:14:04 +0000502 p = per_cpu_ptr(vlan->pcpu_stats, i);
Eric Dumazetbc661542010-06-24 00:54:21 +0000503 do {
504 start = u64_stats_fetch_begin_bh(&p->syncp);
505 rx_packets = p->rx_packets;
506 rx_bytes = p->rx_bytes;
507 rx_multicast = p->rx_multicast;
Eric Dumazet8ffab512010-11-10 21:14:04 +0000508 tx_packets = p->tx_packets;
509 tx_bytes = p->tx_bytes;
Eric Dumazetbc661542010-06-24 00:54:21 +0000510 } while (u64_stats_fetch_retry_bh(&p->syncp, start));
Eric Dumazet8ffab512010-11-10 21:14:04 +0000511
512 stats->rx_packets += rx_packets;
513 stats->rx_bytes += rx_bytes;
514 stats->multicast += rx_multicast;
515 stats->tx_packets += tx_packets;
516 stats->tx_bytes += tx_bytes;
517 /* rx_errors & tx_dropped are u32, updated
518 * without syncp protection.
519 */
520 rx_errors += p->rx_errors;
521 tx_dropped += p->tx_dropped;
Eric Dumazetfccaf712009-11-17 08:53:49 +0000522 }
Eric Dumazet8ffab512010-11-10 21:14:04 +0000523 stats->rx_errors = rx_errors;
524 stats->rx_dropped = rx_errors;
525 stats->tx_dropped = tx_dropped;
Eric Dumazetfccaf712009-11-17 08:53:49 +0000526 }
527 return stats;
528}
529
Jiri Pirko8e586132011-12-08 19:52:37 -0500530static int macvlan_vlan_rx_add_vid(struct net_device *dev,
John Fastabend8d13e672011-06-06 04:27:16 +0000531 unsigned short vid)
532{
533 struct macvlan_dev *vlan = netdev_priv(dev);
534 struct net_device *lowerdev = vlan->lowerdev;
John Fastabend8d13e672011-06-06 04:27:16 +0000535
Jiri Pirko87002b02011-12-08 04:11:17 +0000536 return vlan_vid_add(lowerdev, vid);
John Fastabend8d13e672011-06-06 04:27:16 +0000537}
538
Jiri Pirko8e586132011-12-08 19:52:37 -0500539static int macvlan_vlan_rx_kill_vid(struct net_device *dev,
John Fastabend8d13e672011-06-06 04:27:16 +0000540 unsigned short vid)
541{
542 struct macvlan_dev *vlan = netdev_priv(dev);
543 struct net_device *lowerdev = vlan->lowerdev;
John Fastabend8d13e672011-06-06 04:27:16 +0000544
Jiri Pirko87002b02011-12-08 04:11:17 +0000545 vlan_vid_del(lowerdev, vid);
Jiri Pirko8e586132011-12-08 19:52:37 -0500546 return 0;
John Fastabend8d13e672011-06-06 04:27:16 +0000547}
548
John Fastabenddf8ef8f2012-04-15 06:44:37 +0000549static int macvlan_fdb_add(struct ndmsg *ndm,
550 struct net_device *dev,
551 unsigned char *addr,
552 u16 flags)
553{
554 struct macvlan_dev *vlan = netdev_priv(dev);
555 int err = -EINVAL;
556
557 if (!vlan->port->passthru)
558 return -EOPNOTSUPP;
559
560 if (is_unicast_ether_addr(addr))
561 err = dev_uc_add_excl(dev, addr);
562 else if (is_multicast_ether_addr(addr))
563 err = dev_mc_add_excl(dev, addr);
564
565 return err;
566}
567
568static int macvlan_fdb_del(struct ndmsg *ndm,
569 struct net_device *dev,
570 unsigned char *addr)
571{
572 struct macvlan_dev *vlan = netdev_priv(dev);
573 int err = -EINVAL;
574
575 if (!vlan->port->passthru)
576 return -EOPNOTSUPP;
577
578 if (is_unicast_ether_addr(addr))
579 err = dev_uc_del(dev, addr);
580 else if (is_multicast_ether_addr(addr))
581 err = dev_mc_del(dev, addr);
582
583 return err;
584}
585
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700586static void macvlan_ethtool_get_drvinfo(struct net_device *dev,
587 struct ethtool_drvinfo *drvinfo)
588{
589 snprintf(drvinfo->driver, 32, "macvlan");
590 snprintf(drvinfo->version, 32, "0.1");
591}
592
Stephen Hemminger9edb8bb2008-10-29 15:31:53 -0700593static int macvlan_ethtool_get_settings(struct net_device *dev,
594 struct ethtool_cmd *cmd)
595{
596 const struct macvlan_dev *vlan = netdev_priv(dev);
Jiri Pirko4bc71cb2011-09-03 03:34:30 +0000597
598 return __ethtool_get_settings(vlan->lowerdev, cmd);
Stephen Hemminger9edb8bb2008-10-29 15:31:53 -0700599}
600
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700601static const struct ethtool_ops macvlan_ethtool_ops = {
602 .get_link = ethtool_op_get_link,
Stephen Hemminger9edb8bb2008-10-29 15:31:53 -0700603 .get_settings = macvlan_ethtool_get_settings,
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700604 .get_drvinfo = macvlan_ethtool_get_drvinfo,
605};
606
Stephen Hemminger54a30c92008-11-19 21:51:06 -0800607static const struct net_device_ops macvlan_netdev_ops = {
608 .ndo_init = macvlan_init,
Eric Dumazetfccaf712009-11-17 08:53:49 +0000609 .ndo_uninit = macvlan_uninit,
Stephen Hemminger54a30c92008-11-19 21:51:06 -0800610 .ndo_open = macvlan_open,
611 .ndo_stop = macvlan_stop,
Stephen Hemminger00829822008-11-20 20:14:53 -0800612 .ndo_start_xmit = macvlan_start_xmit,
Stephen Hemminger54a30c92008-11-19 21:51:06 -0800613 .ndo_change_mtu = macvlan_change_mtu,
614 .ndo_change_rx_flags = macvlan_change_rx_flags,
615 .ndo_set_mac_address = macvlan_set_mac_address,
John Fastabenddf8ef8f2012-04-15 06:44:37 +0000616 .ndo_set_rx_mode = macvlan_set_mac_lists,
Eric Dumazetbc661542010-06-24 00:54:21 +0000617 .ndo_get_stats64 = macvlan_dev_get_stats64,
Stephen Hemminger54a30c92008-11-19 21:51:06 -0800618 .ndo_validate_addr = eth_validate_addr,
John Fastabend8d13e672011-06-06 04:27:16 +0000619 .ndo_vlan_rx_add_vid = macvlan_vlan_rx_add_vid,
620 .ndo_vlan_rx_kill_vid = macvlan_vlan_rx_kill_vid,
John Fastabenddf8ef8f2012-04-15 06:44:37 +0000621 .ndo_fdb_add = macvlan_fdb_add,
622 .ndo_fdb_del = macvlan_fdb_del,
623 .ndo_fdb_dump = ndo_dflt_fdb_dump,
Stephen Hemminger54a30c92008-11-19 21:51:06 -0800624};
625
Herbert Xu8a357472010-07-21 21:44:31 +0000626void macvlan_common_setup(struct net_device *dev)
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700627{
628 ether_setup(dev);
629
Neil Horman550fd082011-07-26 06:05:38 +0000630 dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
Stephen Hemminger54a30c92008-11-19 21:51:06 -0800631 dev->netdev_ops = &macvlan_netdev_ops;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700632 dev->destructor = free_netdev;
Stephen Hemminger3b04ddd2007-10-09 01:40:57 -0700633 dev->header_ops = &macvlan_hard_header_ops,
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700634 dev->ethtool_ops = &macvlan_ethtool_ops;
Herbert Xu8a357472010-07-21 21:44:31 +0000635}
636EXPORT_SYMBOL_GPL(macvlan_common_setup);
637
638static void macvlan_setup(struct net_device *dev)
639{
640 macvlan_common_setup(dev);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700641 dev->tx_queue_len = 0;
642}
643
644static int macvlan_port_create(struct net_device *dev)
645{
646 struct macvlan_port *port;
647 unsigned int i;
Jiri Pirkoab95bfe2010-06-01 21:52:08 +0000648 int err;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700649
650 if (dev->type != ARPHRD_ETHER || dev->flags & IFF_LOOPBACK)
651 return -EINVAL;
652
653 port = kzalloc(sizeof(*port), GFP_KERNEL);
654 if (port == NULL)
655 return -ENOMEM;
656
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +0000657 port->passthru = false;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700658 port->dev = dev;
659 INIT_LIST_HEAD(&port->vlans);
660 for (i = 0; i < MACVLAN_HASH_SIZE; i++)
661 INIT_HLIST_HEAD(&port->vlan_hash[i]);
Jiri Pirkoab95bfe2010-06-01 21:52:08 +0000662
Jiri Pirkoa35e2c12010-06-15 03:27:57 +0000663 err = netdev_rx_handler_register(dev, macvlan_handle_frame, port);
664 if (err)
Jiri Pirkoab95bfe2010-06-01 21:52:08 +0000665 kfree(port);
Eric Dumazetd9351562011-05-20 14:59:23 -0400666 else
667 dev->priv_flags |= IFF_MACVLAN_PORT;
Jiri Pirkoab95bfe2010-06-01 21:52:08 +0000668 return err;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700669}
670
671static void macvlan_port_destroy(struct net_device *dev)
672{
Jiri Pirkoa35e2c12010-06-15 03:27:57 +0000673 struct macvlan_port *port = macvlan_port_get(dev);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700674
Jiri Pirkoa35e2c12010-06-15 03:27:57 +0000675 dev->priv_flags &= ~IFF_MACVLAN_PORT;
Jiri Pirkoab95bfe2010-06-01 21:52:08 +0000676 netdev_rx_handler_unregister(dev);
Lai Jiangshan6e070ae2011-03-18 12:00:07 +0800677 kfree_rcu(port, rcu);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700678}
679
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700680static int macvlan_validate(struct nlattr *tb[], struct nlattr *data[])
681{
682 if (tb[IFLA_ADDRESS]) {
683 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
684 return -EINVAL;
685 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
686 return -EADDRNOTAVAIL;
687 }
Arnd Bergmann27c0b1a2009-11-26 06:07:11 +0000688
689 if (data && data[IFLA_MACVLAN_MODE]) {
690 switch (nla_get_u32(data[IFLA_MACVLAN_MODE])) {
691 case MACVLAN_MODE_PRIVATE:
692 case MACVLAN_MODE_VEPA:
693 case MACVLAN_MODE_BRIDGE:
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +0000694 case MACVLAN_MODE_PASSTHRU:
Arnd Bergmann27c0b1a2009-11-26 06:07:11 +0000695 break;
696 default:
697 return -EINVAL;
698 }
699 }
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700700 return 0;
701}
702
Arnd Bergmannfc0663d2010-01-30 12:23:40 +0000703int macvlan_common_newlink(struct net *src_net, struct net_device *dev,
704 struct nlattr *tb[], struct nlattr *data[],
705 int (*receive)(struct sk_buff *skb),
706 int (*forward)(struct net_device *dev,
707 struct sk_buff *skb))
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700708{
709 struct macvlan_dev *vlan = netdev_priv(dev);
710 struct macvlan_port *port;
711 struct net_device *lowerdev;
712 int err;
713
714 if (!tb[IFLA_LINK])
715 return -EINVAL;
716
Eric W. Biederman81adee42009-11-08 00:53:51 -0800717 lowerdev = __dev_get_by_index(src_net, nla_get_u32(tb[IFLA_LINK]));
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700718 if (lowerdev == NULL)
719 return -ENODEV;
720
Eric Biedermanb0832a22009-03-13 13:15:37 -0700721 /* When creating macvlans on top of other macvlans - use
722 * the real device as the lowerdev.
Patrick McHardya6ca5f12008-01-10 22:39:28 -0800723 */
Eric Biedermanb0832a22009-03-13 13:15:37 -0700724 if (lowerdev->rtnl_link_ops == dev->rtnl_link_ops) {
725 struct macvlan_dev *lowervlan = netdev_priv(lowerdev);
726 lowerdev = lowervlan->lowerdev;
727 }
Patrick McHardya6ca5f12008-01-10 22:39:28 -0800728
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700729 if (!tb[IFLA_MTU])
730 dev->mtu = lowerdev->mtu;
731 else if (dev->mtu > lowerdev->mtu)
732 return -EINVAL;
733
734 if (!tb[IFLA_ADDRESS])
Danny Kukawka7ce5d222012-02-15 06:45:40 +0000735 eth_hw_addr_random(dev);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700736
Jiri Pirkoa35e2c12010-06-15 03:27:57 +0000737 if (!macvlan_port_exists(lowerdev)) {
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700738 err = macvlan_port_create(lowerdev);
739 if (err < 0)
740 return err;
741 }
Jiri Pirkoa35e2c12010-06-15 03:27:57 +0000742 port = macvlan_port_get(lowerdev);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700743
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +0000744 /* Only 1 macvlan device can be created in passthru mode */
745 if (port->passthru)
746 return -EINVAL;
747
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700748 vlan->lowerdev = lowerdev;
749 vlan->dev = dev;
750 vlan->port = port;
Arnd Bergmannfc0663d2010-01-30 12:23:40 +0000751 vlan->receive = receive;
752 vlan->forward = forward;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700753
Arnd Bergmann27c0b1a2009-11-26 06:07:11 +0000754 vlan->mode = MACVLAN_MODE_VEPA;
755 if (data && data[IFLA_MACVLAN_MODE])
756 vlan->mode = nla_get_u32(data[IFLA_MACVLAN_MODE]);
757
John Fastabenddf8ef8f2012-04-15 06:44:37 +0000758 if (data && data[IFLA_MACVLAN_FLAGS])
759 vlan->flags = nla_get_u16(data[IFLA_MACVLAN_FLAGS]);
760
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +0000761 if (vlan->mode == MACVLAN_MODE_PASSTHRU) {
Eric W. Biedermand5cd92442011-03-21 18:22:22 -0700762 if (port->count)
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +0000763 return -EINVAL;
764 port->passthru = true;
765 memcpy(dev->dev_addr, lowerdev->dev_addr, ETH_ALEN);
766 }
767
Eric W. Biedermand5cd92442011-03-21 18:22:22 -0700768 port->count += 1;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700769 err = register_netdevice(dev);
770 if (err < 0)
Jiri Pirkof16d3d52010-05-24 07:02:25 +0000771 goto destroy_port;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700772
773 list_add_tail(&vlan->list, &port->vlans);
Patrick Mullaneyfc4a7482009-12-03 15:59:22 -0800774 netif_stacked_transfer_operstate(lowerdev, dev);
Jiri Pirkof16d3d52010-05-24 07:02:25 +0000775
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700776 return 0;
Jiri Pirkof16d3d52010-05-24 07:02:25 +0000777
778destroy_port:
Eric W. Biedermand5cd92442011-03-21 18:22:22 -0700779 port->count -= 1;
780 if (!port->count)
Jiri Pirkof16d3d52010-05-24 07:02:25 +0000781 macvlan_port_destroy(lowerdev);
782
783 return err;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700784}
Arnd Bergmannfc0663d2010-01-30 12:23:40 +0000785EXPORT_SYMBOL_GPL(macvlan_common_newlink);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700786
Arnd Bergmannfc0663d2010-01-30 12:23:40 +0000787static int macvlan_newlink(struct net *src_net, struct net_device *dev,
788 struct nlattr *tb[], struct nlattr *data[])
789{
790 return macvlan_common_newlink(src_net, dev, tb, data,
791 netif_rx,
792 dev_forward_skb);
793}
794
795void macvlan_dellink(struct net_device *dev, struct list_head *head)
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700796{
797 struct macvlan_dev *vlan = netdev_priv(dev);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700798
799 list_del(&vlan->list);
Eric Dumazet23289a32009-10-27 07:06:36 +0000800 unregister_netdevice_queue(dev, head);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700801}
Arnd Bergmannfc0663d2010-01-30 12:23:40 +0000802EXPORT_SYMBOL_GPL(macvlan_dellink);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700803
Arnd Bergmann27c0b1a2009-11-26 06:07:11 +0000804static int macvlan_changelink(struct net_device *dev,
805 struct nlattr *tb[], struct nlattr *data[])
806{
807 struct macvlan_dev *vlan = netdev_priv(dev);
808 if (data && data[IFLA_MACVLAN_MODE])
809 vlan->mode = nla_get_u32(data[IFLA_MACVLAN_MODE]);
John Fastabenddf8ef8f2012-04-15 06:44:37 +0000810 if (data && data[IFLA_MACVLAN_FLAGS]) {
811 __u16 flags = nla_get_u16(data[IFLA_MACVLAN_FLAGS]);
812 bool promisc = (flags ^ vlan->flags) & MACVLAN_FLAG_NOPROMISC;
813
814 if (promisc && (flags & MACVLAN_FLAG_NOPROMISC))
815 dev_set_promiscuity(vlan->lowerdev, -1);
816 else if (promisc && !(flags & MACVLAN_FLAG_NOPROMISC))
817 dev_set_promiscuity(vlan->lowerdev, 1);
818 vlan->flags = flags;
819 }
Arnd Bergmann27c0b1a2009-11-26 06:07:11 +0000820 return 0;
821}
822
823static size_t macvlan_get_size(const struct net_device *dev)
824{
825 return nla_total_size(4);
826}
827
828static int macvlan_fill_info(struct sk_buff *skb,
829 const struct net_device *dev)
830{
831 struct macvlan_dev *vlan = netdev_priv(dev);
832
David S. Milleread9a762012-04-01 20:23:06 -0400833 if (nla_put_u32(skb, IFLA_MACVLAN_MODE, vlan->mode))
834 goto nla_put_failure;
John Fastabenddf8ef8f2012-04-15 06:44:37 +0000835 if (nla_put_u16(skb, IFLA_MACVLAN_FLAGS, vlan->flags))
836 goto nla_put_failure;
Arnd Bergmann27c0b1a2009-11-26 06:07:11 +0000837 return 0;
838
839nla_put_failure:
840 return -EMSGSIZE;
841}
842
843static const struct nla_policy macvlan_policy[IFLA_MACVLAN_MAX + 1] = {
John Fastabenddf8ef8f2012-04-15 06:44:37 +0000844 [IFLA_MACVLAN_MODE] = { .type = NLA_U32 },
845 [IFLA_MACVLAN_FLAGS] = { .type = NLA_U16 },
Arnd Bergmann27c0b1a2009-11-26 06:07:11 +0000846};
847
Arnd Bergmannfc0663d2010-01-30 12:23:40 +0000848int macvlan_link_register(struct rtnl_link_ops *ops)
849{
850 /* common fields */
851 ops->priv_size = sizeof(struct macvlan_dev);
Arnd Bergmannfc0663d2010-01-30 12:23:40 +0000852 ops->validate = macvlan_validate;
853 ops->maxtype = IFLA_MACVLAN_MAX;
854 ops->policy = macvlan_policy;
855 ops->changelink = macvlan_changelink;
856 ops->get_size = macvlan_get_size;
857 ops->fill_info = macvlan_fill_info;
858
859 return rtnl_link_register(ops);
860};
861EXPORT_SYMBOL_GPL(macvlan_link_register);
862
863static struct rtnl_link_ops macvlan_link_ops = {
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700864 .kind = "macvlan",
Herbert Xu8a357472010-07-21 21:44:31 +0000865 .setup = macvlan_setup,
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700866 .newlink = macvlan_newlink,
867 .dellink = macvlan_dellink,
868};
869
870static int macvlan_device_event(struct notifier_block *unused,
871 unsigned long event, void *ptr)
872{
873 struct net_device *dev = ptr;
874 struct macvlan_dev *vlan, *next;
875 struct macvlan_port *port;
Eric Dumazet226bd342011-05-08 23:17:57 +0000876 LIST_HEAD(list_kill);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700877
Jiri Pirkoa35e2c12010-06-15 03:27:57 +0000878 if (!macvlan_port_exists(dev))
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700879 return NOTIFY_DONE;
880
Jiri Pirkoa35e2c12010-06-15 03:27:57 +0000881 port = macvlan_port_get(dev);
882
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700883 switch (event) {
884 case NETDEV_CHANGE:
885 list_for_each_entry(vlan, &port->vlans, list)
Patrick Mullaneyfc4a7482009-12-03 15:59:22 -0800886 netif_stacked_transfer_operstate(vlan->lowerdev,
887 vlan->dev);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700888 break;
889 case NETDEV_FEAT_CHANGE:
890 list_for_each_entry(vlan, &port->vlans, list) {
891 vlan->dev->features = dev->features & MACVLAN_FEATURES;
Patrick McHardy8c2acc52009-11-23 14:18:53 -0800892 vlan->dev->gso_max_size = dev->gso_max_size;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700893 netdev_features_change(vlan->dev);
894 }
895 break;
896 case NETDEV_UNREGISTER:
David Lamparter3b27e102010-09-17 03:22:19 +0000897 /* twiddle thumbs on netns device moves */
898 if (dev->reg_state != NETREG_UNREGISTERING)
899 break;
900
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700901 list_for_each_entry_safe(vlan, next, &port->vlans, list)
Eric Dumazet226bd342011-05-08 23:17:57 +0000902 vlan->dev->rtnl_link_ops->dellink(vlan->dev, &list_kill);
903 unregister_netdevice_many(&list_kill);
904 list_del(&list_kill);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700905 break;
Jiri Pirko1c01fe12010-03-10 10:30:19 +0000906 case NETDEV_PRE_TYPE_CHANGE:
907 /* Forbid underlaying device to change its type. */
908 return NOTIFY_BAD;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700909 }
910 return NOTIFY_DONE;
911}
912
913static struct notifier_block macvlan_notifier_block __read_mostly = {
914 .notifier_call = macvlan_device_event,
915};
916
917static int __init macvlan_init_module(void)
918{
919 int err;
920
921 register_netdevice_notifier(&macvlan_notifier_block);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700922
Arnd Bergmannfc0663d2010-01-30 12:23:40 +0000923 err = macvlan_link_register(&macvlan_link_ops);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700924 if (err < 0)
925 goto err1;
926 return 0;
927err1:
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700928 unregister_netdevice_notifier(&macvlan_notifier_block);
929 return err;
930}
931
932static void __exit macvlan_cleanup_module(void)
933{
934 rtnl_link_unregister(&macvlan_link_ops);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700935 unregister_netdevice_notifier(&macvlan_notifier_block);
936}
937
938module_init(macvlan_init_module);
939module_exit(macvlan_cleanup_module);
940
941MODULE_LICENSE("GPL");
942MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>");
943MODULE_DESCRIPTION("Driver for MAC address based VLANs");
944MODULE_ALIAS_RTNL_LINK("macvlan");