blob: 24ea994b6274c324143973a74aeedf78088ffc74 [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
Arnd Bergmann618e1b72009-11-26 06:07:10 +0000122 if (local)
Vlad Yasevich2f6a1b62013-12-11 13:27:11 -0500123 return dev_forward_skb(dev, skb);
Arnd Bergmann618e1b72009-11-26 06:07:10 +0000124
Arnd Bergmanna1e514c2009-11-26 06:07:09 +0000125 skb->dev = dev;
Joe Perchesa6700db2012-05-09 17:04:04 +0000126 if (ether_addr_equal_64bits(eth->h_dest, dev->broadcast))
Arnd Bergmanna1e514c2009-11-26 06:07:09 +0000127 skb->pkt_type = PACKET_BROADCAST;
128 else
129 skb->pkt_type = PACKET_MULTICAST;
130
Vlad Yasevich2f6a1b62013-12-11 13:27:11 -0500131 return netif_rx(skb);
Arnd Bergmanna1e514c2009-11-26 06:07:09 +0000132}
133
Eric Dumazet3807ff52013-02-07 16:41:02 +0000134static u32 macvlan_hash_mix(const struct macvlan_dev *vlan)
135{
136 return (u32)(((unsigned long)vlan) >> L1_CACHE_SHIFT);
137}
138
139
140static unsigned int mc_hash(const struct macvlan_dev *vlan,
141 const unsigned char *addr)
Eric Dumazetcd431e72013-02-05 20:22:50 +0000142{
143 u32 val = __get_unaligned_cpu32(addr + 2);
144
Eric Dumazet3807ff52013-02-07 16:41:02 +0000145 val ^= macvlan_hash_mix(vlan);
Eric Dumazetcd431e72013-02-05 20:22:50 +0000146 return hash_32(val, MACVLAN_MC_FILTER_BITS);
147}
148
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700149static void macvlan_broadcast(struct sk_buff *skb,
Arnd Bergmann618e1b72009-11-26 06:07:10 +0000150 const struct macvlan_port *port,
151 struct net_device *src,
152 enum macvlan_mode mode)
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700153{
154 const struct ethhdr *eth = eth_hdr(skb);
155 const struct macvlan_dev *vlan;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700156 struct sk_buff *nskb;
157 unsigned int i;
Arnd Bergmanna1e514c2009-11-26 06:07:09 +0000158 int err;
Eric Dumazet3807ff52013-02-07 16:41:02 +0000159 unsigned int hash;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700160
Patrick McHardyefbbced2008-11-26 15:30:48 -0800161 if (skb->protocol == htons(ETH_P_PAUSE))
162 return;
163
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700164 for (i = 0; i < MACVLAN_HASH_SIZE; i++) {
Sasha Levinb67bfe02013-02-27 17:06:00 -0800165 hlist_for_each_entry_rcu(vlan, &port->vlan_hash[i], hlist) {
Arnd Bergmann618e1b72009-11-26 06:07:10 +0000166 if (vlan->dev == src || !(vlan->mode & mode))
167 continue;
168
Eric Dumazet3807ff52013-02-07 16:41:02 +0000169 hash = mc_hash(vlan, eth->h_dest);
Eric Dumazetcd431e72013-02-05 20:22:50 +0000170 if (!test_bit(hash, vlan->mc_filter))
171 continue;
Herbert Xude9e8f32013-09-07 12:27:11 +1000172
173 err = NET_RX_DROP;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700174 nskb = skb_clone(skb, GFP_ATOMIC);
Herbert Xude9e8f32013-09-07 12:27:11 +1000175 if (likely(nskb))
176 err = macvlan_broadcast_one(
177 nskb, vlan, eth,
178 mode == MACVLAN_MODE_BRIDGE);
Arnd Bergmanna1e514c2009-11-26 06:07:09 +0000179 macvlan_count_rx(vlan, skb->len + ETH_HLEN,
180 err == NET_RX_SUCCESS, 1);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700181 }
182 }
183}
184
185/* called under rcu_read_lock() from netif_receive_skb */
Jiri Pirko8a4eb572011-03-12 03:14:39 +0000186static rx_handler_result_t macvlan_handle_frame(struct sk_buff **pskb)
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700187{
Jiri Pirkoab95bfe2010-06-01 21:52:08 +0000188 struct macvlan_port *port;
Jiri Pirko8a4eb572011-03-12 03:14:39 +0000189 struct sk_buff *skb = *pskb;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700190 const struct ethhdr *eth = eth_hdr(skb);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700191 const struct macvlan_dev *vlan;
Arnd Bergmann618e1b72009-11-26 06:07:10 +0000192 const struct macvlan_dev *src;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700193 struct net_device *dev;
Sridhar Samudralaba018772010-07-27 09:10:07 +0000194 unsigned int len = 0;
195 int ret = NET_RX_DROP;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700196
Jiri Pirkoa35e2c12010-06-15 03:27:57 +0000197 port = macvlan_port_get_rcu(skb->dev);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700198 if (is_multicast_ether_addr(eth->h_dest)) {
Eric Dumazetbc416d92011-10-06 10:28:31 +0000199 skb = ip_check_defrag(skb, IP_DEFRAG_MACVLAN);
200 if (!skb)
201 return RX_HANDLER_CONSUMED;
Eric Dumazet4ec7ac12012-01-23 05:38:59 +0000202 eth = eth_hdr(skb);
Arnd Bergmann618e1b72009-11-26 06:07:10 +0000203 src = macvlan_hash_lookup(port, eth->h_source);
204 if (!src)
205 /* frame comes from an external address */
206 macvlan_broadcast(skb, port, NULL,
207 MACVLAN_MODE_PRIVATE |
208 MACVLAN_MODE_VEPA |
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +0000209 MACVLAN_MODE_PASSTHRU|
Arnd Bergmann618e1b72009-11-26 06:07:10 +0000210 MACVLAN_MODE_BRIDGE);
211 else if (src->mode == MACVLAN_MODE_VEPA)
212 /* flood to everyone except source */
213 macvlan_broadcast(skb, port, src->dev,
214 MACVLAN_MODE_VEPA |
215 MACVLAN_MODE_BRIDGE);
216 else if (src->mode == MACVLAN_MODE_BRIDGE)
217 /*
218 * flood only to VEPA ports, bridge ports
219 * already saw the frame on the way out.
220 */
221 macvlan_broadcast(skb, port, src->dev,
222 MACVLAN_MODE_VEPA);
stephen hemminger729e72a2011-11-02 12:11:53 +0000223 else {
224 /* forward to original port. */
225 vlan = src;
226 ret = macvlan_broadcast_one(skb, vlan, eth, 0);
227 goto out;
228 }
229
Jiri Pirko8a4eb572011-03-12 03:14:39 +0000230 return RX_HANDLER_PASS;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700231 }
232
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +0000233 if (port->passthru)
Jiri Pirko233c7df2013-05-09 04:23:40 +0000234 vlan = list_first_or_null_rcu(&port->vlans,
235 struct macvlan_dev, list);
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +0000236 else
237 vlan = macvlan_hash_lookup(port, eth->h_dest);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700238 if (vlan == NULL)
Jiri Pirko8a4eb572011-03-12 03:14:39 +0000239 return RX_HANDLER_PASS;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700240
241 dev = vlan->dev;
242 if (unlikely(!(dev->flags & IFF_UP))) {
243 kfree_skb(skb);
Jiri Pirko8a4eb572011-03-12 03:14:39 +0000244 return RX_HANDLER_CONSUMED;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700245 }
Arnd Bergmanna1e514c2009-11-26 06:07:09 +0000246 len = skb->len + ETH_HLEN;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700247 skb = skb_share_check(skb, GFP_ATOMIC);
Arnd Bergmanna1e514c2009-11-26 06:07:09 +0000248 if (!skb)
Sridhar Samudralaba018772010-07-27 09:10:07 +0000249 goto out;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700250
251 skb->dev = dev;
252 skb->pkt_type = PACKET_HOST;
253
Vlad Yasevich2f6a1b62013-12-11 13:27:11 -0500254 ret = netif_rx(skb);
Sridhar Samudralaba018772010-07-27 09:10:07 +0000255
256out:
257 macvlan_count_rx(vlan, len, ret == NET_RX_SUCCESS, 0);
Jiri Pirko8a4eb572011-03-12 03:14:39 +0000258 return RX_HANDLER_CONSUMED;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700259}
260
Arnd Bergmann618e1b72009-11-26 06:07:10 +0000261static int macvlan_queue_xmit(struct sk_buff *skb, struct net_device *dev)
262{
263 const struct macvlan_dev *vlan = netdev_priv(dev);
264 const struct macvlan_port *port = vlan->port;
265 const struct macvlan_dev *dest;
Daniel Lezcano12a28562011-03-14 06:08:07 +0000266 __u8 ip_summed = skb->ip_summed;
Arnd Bergmann618e1b72009-11-26 06:07:10 +0000267
268 if (vlan->mode == MACVLAN_MODE_BRIDGE) {
269 const struct ethhdr *eth = (void *)skb->data;
Daniel Lezcano12a28562011-03-14 06:08:07 +0000270 skb->ip_summed = CHECKSUM_UNNECESSARY;
Arnd Bergmann618e1b72009-11-26 06:07:10 +0000271
272 /* send to other bridge ports directly */
273 if (is_multicast_ether_addr(eth->h_dest)) {
274 macvlan_broadcast(skb, port, dev, MACVLAN_MODE_BRIDGE);
275 goto xmit_world;
276 }
277
278 dest = macvlan_hash_lookup(port, eth->h_dest);
279 if (dest && dest->mode == MACVLAN_MODE_BRIDGE) {
David Warda37dd332011-05-19 02:53:20 +0000280 /* send to lowerdev first for its network taps */
David Wardcb2d0f32011-09-18 12:53:20 +0000281 dev_forward_skb(vlan->lowerdev, skb);
Arnd Bergmann618e1b72009-11-26 06:07:10 +0000282
283 return NET_XMIT_SUCCESS;
284 }
285 }
286
287xmit_world:
Daniel Lezcano12a28562011-03-14 06:08:07 +0000288 skb->ip_summed = ip_summed;
David S. Miller59b99972012-05-10 23:03:34 -0400289 skb->dev = vlan->lowerdev;
Arnd Bergmann618e1b72009-11-26 06:07:10 +0000290 return dev_queue_xmit(skb);
291}
292
Arnd Bergmannfc0663d2010-01-30 12:23:40 +0000293netdev_tx_t macvlan_start_xmit(struct sk_buff *skb,
294 struct net_device *dev)
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700295{
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700296 unsigned int len = skb->len;
297 int ret;
Eric Dumazet8ffab512010-11-10 21:14:04 +0000298 const struct macvlan_dev *vlan = netdev_priv(dev);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700299
John Fastabenda6cc0cf2013-11-06 09:54:46 -0800300 if (vlan->fwd_priv) {
301 skb->dev = vlan->lowerdev;
302 ret = dev_hard_start_xmit(skb, skb->dev, NULL, vlan->fwd_priv);
303 } else {
304 ret = macvlan_queue_xmit(skb, dev);
305 }
306
Eric Dumazet2d6c9ff2010-05-10 04:51:02 +0000307 if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) {
Eric Dumazet8ffab512010-11-10 21:14:04 +0000308 struct macvlan_pcpu_stats *pcpu_stats;
Eric Dumazet2c114552009-09-03 00:11:45 +0000309
Eric Dumazet8ffab512010-11-10 21:14:04 +0000310 pcpu_stats = this_cpu_ptr(vlan->pcpu_stats);
311 u64_stats_update_begin(&pcpu_stats->syncp);
312 pcpu_stats->tx_packets++;
313 pcpu_stats->tx_bytes += len;
314 u64_stats_update_end(&pcpu_stats->syncp);
315 } else {
316 this_cpu_inc(vlan->pcpu_stats->tx_dropped);
317 }
Patrick McHardycbbef5e2009-11-10 06:14:24 +0000318 return ret;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700319}
Arnd Bergmannfc0663d2010-01-30 12:23:40 +0000320EXPORT_SYMBOL_GPL(macvlan_start_xmit);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700321
322static int macvlan_hard_header(struct sk_buff *skb, struct net_device *dev,
Stephen Hemminger3b04ddd2007-10-09 01:40:57 -0700323 unsigned short type, const void *daddr,
324 const void *saddr, unsigned len)
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700325{
326 const struct macvlan_dev *vlan = netdev_priv(dev);
327 struct net_device *lowerdev = vlan->lowerdev;
328
Stephen Hemminger0c4e8582007-10-09 01:36:32 -0700329 return dev_hard_header(skb, lowerdev, type, daddr,
330 saddr ? : dev->dev_addr, len);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700331}
332
Stephen Hemminger3b04ddd2007-10-09 01:40:57 -0700333static const struct header_ops macvlan_hard_header_ops = {
334 .create = macvlan_hard_header,
335 .rebuild = eth_rebuild_header,
336 .parse = eth_header_parse,
Stephen Hemminger3b04ddd2007-10-09 01:40:57 -0700337 .cache = eth_header_cache,
338 .cache_update = eth_header_cache_update,
339};
340
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700341static int macvlan_open(struct net_device *dev)
342{
343 struct macvlan_dev *vlan = netdev_priv(dev);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700344 struct net_device *lowerdev = vlan->lowerdev;
345 int err;
346
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +0000347 if (vlan->port->passthru) {
Michael S. Tsirkin78738142013-08-01 13:50:10 +0300348 if (!(vlan->flags & MACVLAN_FLAG_NOPROMISC)) {
349 err = dev_set_promiscuity(lowerdev, 1);
350 if (err < 0)
351 goto out;
352 }
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +0000353 goto hash_add;
354 }
355
John Fastabenda6cc0cf2013-11-06 09:54:46 -0800356 if (lowerdev->features & NETIF_F_HW_L2FW_DOFFLOAD) {
357 vlan->fwd_priv =
358 lowerdev->netdev_ops->ndo_dfwd_add_station(lowerdev, dev);
359
360 /* If we get a NULL pointer back, or if we get an error
361 * then we should just fall through to the non accelerated path
362 */
363 if (IS_ERR_OR_NULL(vlan->fwd_priv)) {
364 vlan->fwd_priv = NULL;
365 } else {
366 dev->features &= ~NETIF_F_LLTX;
367 return 0;
368 }
369 }
370
Eric Biedermanf9ac30f2009-03-13 13:16:13 -0700371 err = -EBUSY;
372 if (macvlan_addr_busy(vlan->port, dev->dev_addr))
373 goto out;
374
Jiri Pirkoa748ee22010-04-01 21:22:09 +0000375 err = dev_uc_add(lowerdev, dev->dev_addr);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700376 if (err < 0)
Wang Chenb89fb7d2008-07-14 20:57:07 -0700377 goto out;
378 if (dev->flags & IFF_ALLMULTI) {
379 err = dev_set_allmulti(lowerdev, 1);
380 if (err < 0)
381 goto del_unicast;
382 }
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +0000383
384hash_add:
Eric Biedermanf9ac30f2009-03-13 13:16:13 -0700385 macvlan_hash_add(vlan);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700386 return 0;
Wang Chenb89fb7d2008-07-14 20:57:07 -0700387
388del_unicast:
Jiri Pirkoa748ee22010-04-01 21:22:09 +0000389 dev_uc_del(lowerdev, dev->dev_addr);
Wang Chenb89fb7d2008-07-14 20:57:07 -0700390out:
John Fastabenda6cc0cf2013-11-06 09:54:46 -0800391 if (vlan->fwd_priv) {
392 lowerdev->netdev_ops->ndo_dfwd_del_station(lowerdev,
393 vlan->fwd_priv);
394 vlan->fwd_priv = NULL;
395 }
Wang Chenb89fb7d2008-07-14 20:57:07 -0700396 return err;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700397}
398
399static int macvlan_stop(struct net_device *dev)
400{
401 struct macvlan_dev *vlan = netdev_priv(dev);
402 struct net_device *lowerdev = vlan->lowerdev;
403
John Fastabenda6cc0cf2013-11-06 09:54:46 -0800404 if (vlan->fwd_priv) {
405 lowerdev->netdev_ops->ndo_dfwd_del_station(lowerdev,
406 vlan->fwd_priv);
407 vlan->fwd_priv = NULL;
408 return 0;
409 }
410
John Fastabenddf8ef8f2012-04-15 06:44:37 +0000411 dev_uc_unsync(lowerdev, dev);
412 dev_mc_unsync(lowerdev, dev);
413
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +0000414 if (vlan->port->passthru) {
John Fastabenddf8ef8f2012-04-15 06:44:37 +0000415 if (!(vlan->flags & MACVLAN_FLAG_NOPROMISC))
416 dev_set_promiscuity(lowerdev, -1);
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +0000417 goto hash_del;
418 }
419
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700420 if (dev->flags & IFF_ALLMULTI)
421 dev_set_allmulti(lowerdev, -1);
422
Jiri Pirkoa748ee22010-04-01 21:22:09 +0000423 dev_uc_del(lowerdev, dev->dev_addr);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700424
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +0000425hash_del:
Eric Dumazet449f4542011-05-19 12:24:16 +0000426 macvlan_hash_del(vlan, !dev->dismantle);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700427 return 0;
428}
429
Patrick McHardyad5d20a2007-11-19 22:00:42 -0800430static int macvlan_set_mac_address(struct net_device *dev, void *p)
431{
432 struct macvlan_dev *vlan = netdev_priv(dev);
433 struct net_device *lowerdev = vlan->lowerdev;
434 struct sockaddr *addr = p;
435 int err;
436
437 if (!is_valid_ether_addr(addr->sa_data))
438 return -EADDRNOTAVAIL;
439
Eric Biedermanf9ac30f2009-03-13 13:16:13 -0700440 if (!(dev->flags & IFF_UP)) {
441 /* Just copy in the new address */
442 memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN);
443 } else {
444 /* Rehash and update the device filters */
445 if (macvlan_addr_busy(vlan->port, addr->sa_data))
446 return -EBUSY;
Patrick McHardyad5d20a2007-11-19 22:00:42 -0800447
Jiri Pirkoa748ee22010-04-01 21:22:09 +0000448 err = dev_uc_add(lowerdev, addr->sa_data);
Jiri Pirkoccffad252009-05-22 23:22:17 +0000449 if (err)
Eric Biedermanf9ac30f2009-03-13 13:16:13 -0700450 return err;
Patrick McHardyad5d20a2007-11-19 22:00:42 -0800451
Jiri Pirkoa748ee22010-04-01 21:22:09 +0000452 dev_uc_del(lowerdev, dev->dev_addr);
Eric Biedermanf9ac30f2009-03-13 13:16:13 -0700453
454 macvlan_hash_change_addr(vlan, addr->sa_data);
455 }
Patrick McHardyad5d20a2007-11-19 22:00:42 -0800456 return 0;
457}
458
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700459static void macvlan_change_rx_flags(struct net_device *dev, int change)
460{
461 struct macvlan_dev *vlan = netdev_priv(dev);
462 struct net_device *lowerdev = vlan->lowerdev;
463
464 if (change & IFF_ALLMULTI)
465 dev_set_allmulti(lowerdev, dev->flags & IFF_ALLMULTI ? 1 : -1);
466}
467
John Fastabenddf8ef8f2012-04-15 06:44:37 +0000468static void macvlan_set_mac_lists(struct net_device *dev)
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700469{
470 struct macvlan_dev *vlan = netdev_priv(dev);
471
Eric Dumazetcd431e72013-02-05 20:22:50 +0000472 if (dev->flags & (IFF_PROMISC | IFF_ALLMULTI)) {
473 bitmap_fill(vlan->mc_filter, MACVLAN_MC_FILTER_SZ);
474 } else {
475 struct netdev_hw_addr *ha;
476 DECLARE_BITMAP(filter, MACVLAN_MC_FILTER_SZ);
477
478 bitmap_zero(filter, MACVLAN_MC_FILTER_SZ);
479 netdev_for_each_mc_addr(ha, dev) {
Eric Dumazet3807ff52013-02-07 16:41:02 +0000480 __set_bit(mc_hash(vlan, ha->addr), filter);
Eric Dumazetcd431e72013-02-05 20:22:50 +0000481 }
Eric Dumazetd5270432013-02-07 16:02:57 +0000482
Eric Dumazet3807ff52013-02-07 16:41:02 +0000483 __set_bit(mc_hash(vlan, dev->broadcast), filter);
Eric Dumazetd5270432013-02-07 16:02:57 +0000484
Eric Dumazetcd431e72013-02-05 20:22:50 +0000485 bitmap_copy(vlan->mc_filter, filter, MACVLAN_MC_FILTER_SZ);
486 }
John Fastabenddf8ef8f2012-04-15 06:44:37 +0000487 dev_uc_sync(vlan->lowerdev, dev);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700488 dev_mc_sync(vlan->lowerdev, dev);
489}
490
491static int macvlan_change_mtu(struct net_device *dev, int new_mtu)
492{
493 struct macvlan_dev *vlan = netdev_priv(dev);
494
495 if (new_mtu < 68 || vlan->lowerdev->mtu < new_mtu)
496 return -EINVAL;
497 dev->mtu = new_mtu;
498 return 0;
499}
500
501/*
502 * macvlan network devices have devices nesting below it and are a special
503 * "super class" of normal network devices; split their locks off into a
504 * separate class since they always nest.
505 */
506static struct lock_class_key macvlan_netdev_xmit_lock_key;
David S. Millercf508b12008-07-22 14:16:42 -0700507static struct lock_class_key macvlan_netdev_addr_lock_key;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700508
509#define MACVLAN_FEATURES \
510 (NETIF_F_SG | NETIF_F_ALL_CSUM | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST | \
511 NETIF_F_GSO | NETIF_F_TSO | NETIF_F_UFO | NETIF_F_GSO_ROBUST | \
John Fastabend8d13e672011-06-06 04:27:16 +0000512 NETIF_F_TSO_ECN | NETIF_F_TSO6 | NETIF_F_GRO | NETIF_F_RXCSUM | \
Patrick McHardy28d2b132013-04-19 02:04:32 +0000513 NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_HW_VLAN_STAG_FILTER)
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700514
515#define MACVLAN_STATE_MASK \
516 ((1<<__LINK_STATE_NOCARRIER) | (1<<__LINK_STATE_DORMANT))
517
David S. Millere8a04642008-07-17 00:34:19 -0700518static void macvlan_set_lockdep_class_one(struct net_device *dev,
519 struct netdev_queue *txq,
520 void *_unused)
David S. Millerc773e842008-07-08 23:13:53 -0700521{
522 lockdep_set_class(&txq->_xmit_lock,
523 &macvlan_netdev_xmit_lock_key);
524}
525
526static void macvlan_set_lockdep_class(struct net_device *dev)
527{
David S. Millercf508b12008-07-22 14:16:42 -0700528 lockdep_set_class(&dev->addr_list_lock,
529 &macvlan_netdev_addr_lock_key);
David S. Millere8a04642008-07-17 00:34:19 -0700530 netdev_for_each_tx_queue(dev, macvlan_set_lockdep_class_one, NULL);
David S. Millerc773e842008-07-08 23:13:53 -0700531}
532
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700533static int macvlan_init(struct net_device *dev)
534{
535 struct macvlan_dev *vlan = netdev_priv(dev);
536 const struct net_device *lowerdev = vlan->lowerdev;
John Stultz827da442013-10-07 15:51:58 -0700537 int i;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700538
539 dev->state = (dev->state & ~MACVLAN_STATE_MASK) |
540 (lowerdev->state & MACVLAN_STATE_MASK);
541 dev->features = lowerdev->features & MACVLAN_FEATURES;
Eric Dumazet8ffab512010-11-10 21:14:04 +0000542 dev->features |= NETIF_F_LLTX;
Patrick McHardy8c2acc52009-11-23 14:18:53 -0800543 dev->gso_max_size = lowerdev->gso_max_size;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700544 dev->iflink = lowerdev->ifindex;
sg.tweak@gmail.comef5c8992009-06-10 09:55:02 +0000545 dev->hard_header_len = lowerdev->hard_header_len;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700546
David S. Millerc773e842008-07-08 23:13:53 -0700547 macvlan_set_lockdep_class(dev);
548
Eric Dumazet8ffab512010-11-10 21:14:04 +0000549 vlan->pcpu_stats = alloc_percpu(struct macvlan_pcpu_stats);
550 if (!vlan->pcpu_stats)
Eric Dumazetfccaf712009-11-17 08:53:49 +0000551 return -ENOMEM;
552
John Stultz827da442013-10-07 15:51:58 -0700553 for_each_possible_cpu(i) {
554 struct macvlan_pcpu_stats *mvlstats;
555 mvlstats = per_cpu_ptr(vlan->pcpu_stats, i);
556 u64_stats_init(&mvlstats->syncp);
557 }
558
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700559 return 0;
560}
561
Eric Dumazetfccaf712009-11-17 08:53:49 +0000562static void macvlan_uninit(struct net_device *dev)
563{
564 struct macvlan_dev *vlan = netdev_priv(dev);
Eric W. Biedermand5cd92442011-03-21 18:22:22 -0700565 struct macvlan_port *port = vlan->port;
Eric Dumazetfccaf712009-11-17 08:53:49 +0000566
Eric Dumazet8ffab512010-11-10 21:14:04 +0000567 free_percpu(vlan->pcpu_stats);
Eric W. Biedermand5cd92442011-03-21 18:22:22 -0700568
569 port->count -= 1;
570 if (!port->count)
571 macvlan_port_destroy(port->dev);
Eric Dumazetfccaf712009-11-17 08:53:49 +0000572}
573
Eric Dumazet28172732010-07-07 14:58:56 -0700574static struct rtnl_link_stats64 *macvlan_dev_get_stats64(struct net_device *dev,
575 struct rtnl_link_stats64 *stats)
Eric Dumazetfccaf712009-11-17 08:53:49 +0000576{
Eric Dumazetfccaf712009-11-17 08:53:49 +0000577 struct macvlan_dev *vlan = netdev_priv(dev);
578
Eric Dumazet8ffab512010-11-10 21:14:04 +0000579 if (vlan->pcpu_stats) {
580 struct macvlan_pcpu_stats *p;
581 u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes;
582 u32 rx_errors = 0, tx_dropped = 0;
Eric Dumazetbc661542010-06-24 00:54:21 +0000583 unsigned int start;
Eric Dumazetfccaf712009-11-17 08:53:49 +0000584 int i;
585
586 for_each_possible_cpu(i) {
Eric Dumazet8ffab512010-11-10 21:14:04 +0000587 p = per_cpu_ptr(vlan->pcpu_stats, i);
Eric Dumazetbc661542010-06-24 00:54:21 +0000588 do {
589 start = u64_stats_fetch_begin_bh(&p->syncp);
590 rx_packets = p->rx_packets;
591 rx_bytes = p->rx_bytes;
592 rx_multicast = p->rx_multicast;
Eric Dumazet8ffab512010-11-10 21:14:04 +0000593 tx_packets = p->tx_packets;
594 tx_bytes = p->tx_bytes;
Eric Dumazetbc661542010-06-24 00:54:21 +0000595 } while (u64_stats_fetch_retry_bh(&p->syncp, start));
Eric Dumazet8ffab512010-11-10 21:14:04 +0000596
597 stats->rx_packets += rx_packets;
598 stats->rx_bytes += rx_bytes;
599 stats->multicast += rx_multicast;
600 stats->tx_packets += tx_packets;
601 stats->tx_bytes += tx_bytes;
602 /* rx_errors & tx_dropped are u32, updated
603 * without syncp protection.
604 */
605 rx_errors += p->rx_errors;
606 tx_dropped += p->tx_dropped;
Eric Dumazetfccaf712009-11-17 08:53:49 +0000607 }
Eric Dumazet8ffab512010-11-10 21:14:04 +0000608 stats->rx_errors = rx_errors;
609 stats->rx_dropped = rx_errors;
610 stats->tx_dropped = tx_dropped;
Eric Dumazetfccaf712009-11-17 08:53:49 +0000611 }
612 return stats;
613}
614
Jiri Pirko8e586132011-12-08 19:52:37 -0500615static int macvlan_vlan_rx_add_vid(struct net_device *dev,
Patrick McHardy80d5c362013-04-19 02:04:28 +0000616 __be16 proto, u16 vid)
John Fastabend8d13e672011-06-06 04:27:16 +0000617{
618 struct macvlan_dev *vlan = netdev_priv(dev);
619 struct net_device *lowerdev = vlan->lowerdev;
John Fastabend8d13e672011-06-06 04:27:16 +0000620
Patrick McHardy80d5c362013-04-19 02:04:28 +0000621 return vlan_vid_add(lowerdev, proto, vid);
John Fastabend8d13e672011-06-06 04:27:16 +0000622}
623
Jiri Pirko8e586132011-12-08 19:52:37 -0500624static int macvlan_vlan_rx_kill_vid(struct net_device *dev,
Patrick McHardy80d5c362013-04-19 02:04:28 +0000625 __be16 proto, u16 vid)
John Fastabend8d13e672011-06-06 04:27:16 +0000626{
627 struct macvlan_dev *vlan = netdev_priv(dev);
628 struct net_device *lowerdev = vlan->lowerdev;
John Fastabend8d13e672011-06-06 04:27:16 +0000629
Patrick McHardy80d5c362013-04-19 02:04:28 +0000630 vlan_vid_del(lowerdev, proto, vid);
Jiri Pirko8e586132011-12-08 19:52:37 -0500631 return 0;
John Fastabend8d13e672011-06-06 04:27:16 +0000632}
633
stephen hemmingeredc7d572012-10-01 12:32:33 +0000634static int macvlan_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
John Fastabenddf8ef8f2012-04-15 06:44:37 +0000635 struct net_device *dev,
stephen hemminger6b6e2722012-09-17 10:03:26 +0000636 const unsigned char *addr,
John Fastabenddf8ef8f2012-04-15 06:44:37 +0000637 u16 flags)
638{
639 struct macvlan_dev *vlan = netdev_priv(dev);
640 int err = -EINVAL;
641
642 if (!vlan->port->passthru)
643 return -EOPNOTSUPP;
644
Thomas Richterab2cfbb2013-07-19 17:20:08 +0200645 if (flags & NLM_F_REPLACE)
646 return -EOPNOTSUPP;
647
John Fastabenddf8ef8f2012-04-15 06:44:37 +0000648 if (is_unicast_ether_addr(addr))
649 err = dev_uc_add_excl(dev, addr);
650 else if (is_multicast_ether_addr(addr))
651 err = dev_mc_add_excl(dev, addr);
652
653 return err;
654}
655
Vlad Yasevich1690be62013-02-13 12:00:18 +0000656static int macvlan_fdb_del(struct ndmsg *ndm, struct nlattr *tb[],
John Fastabenddf8ef8f2012-04-15 06:44:37 +0000657 struct net_device *dev,
stephen hemminger6b6e2722012-09-17 10:03:26 +0000658 const unsigned char *addr)
John Fastabenddf8ef8f2012-04-15 06:44:37 +0000659{
660 struct macvlan_dev *vlan = netdev_priv(dev);
661 int err = -EINVAL;
662
663 if (!vlan->port->passthru)
664 return -EOPNOTSUPP;
665
666 if (is_unicast_ether_addr(addr))
667 err = dev_uc_del(dev, addr);
668 else if (is_multicast_ether_addr(addr))
669 err = dev_mc_del(dev, addr);
670
671 return err;
672}
673
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700674static void macvlan_ethtool_get_drvinfo(struct net_device *dev,
675 struct ethtool_drvinfo *drvinfo)
676{
Jiri Pirko7826d432013-01-06 00:44:26 +0000677 strlcpy(drvinfo->driver, "macvlan", sizeof(drvinfo->driver));
678 strlcpy(drvinfo->version, "0.1", sizeof(drvinfo->version));
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700679}
680
Stephen Hemminger9edb8bb2008-10-29 15:31:53 -0700681static int macvlan_ethtool_get_settings(struct net_device *dev,
682 struct ethtool_cmd *cmd)
683{
684 const struct macvlan_dev *vlan = netdev_priv(dev);
Jiri Pirko4bc71cb2011-09-03 03:34:30 +0000685
686 return __ethtool_get_settings(vlan->lowerdev, cmd);
Stephen Hemminger9edb8bb2008-10-29 15:31:53 -0700687}
688
Vlad Yasevich2be5c762013-06-25 16:04:21 -0400689static netdev_features_t macvlan_fix_features(struct net_device *dev,
690 netdev_features_t features)
691{
692 struct macvlan_dev *vlan = netdev_priv(dev);
693
694 return features & (vlan->set_features | ~MACVLAN_FEATURES);
695}
696
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700697static const struct ethtool_ops macvlan_ethtool_ops = {
698 .get_link = ethtool_op_get_link,
Stephen Hemminger9edb8bb2008-10-29 15:31:53 -0700699 .get_settings = macvlan_ethtool_get_settings,
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700700 .get_drvinfo = macvlan_ethtool_get_drvinfo,
701};
702
Stephen Hemminger54a30c92008-11-19 21:51:06 -0800703static const struct net_device_ops macvlan_netdev_ops = {
704 .ndo_init = macvlan_init,
Eric Dumazetfccaf712009-11-17 08:53:49 +0000705 .ndo_uninit = macvlan_uninit,
Stephen Hemminger54a30c92008-11-19 21:51:06 -0800706 .ndo_open = macvlan_open,
707 .ndo_stop = macvlan_stop,
Stephen Hemminger00829822008-11-20 20:14:53 -0800708 .ndo_start_xmit = macvlan_start_xmit,
Stephen Hemminger54a30c92008-11-19 21:51:06 -0800709 .ndo_change_mtu = macvlan_change_mtu,
Vlad Yasevich2be5c762013-06-25 16:04:21 -0400710 .ndo_fix_features = macvlan_fix_features,
Stephen Hemminger54a30c92008-11-19 21:51:06 -0800711 .ndo_change_rx_flags = macvlan_change_rx_flags,
712 .ndo_set_mac_address = macvlan_set_mac_address,
John Fastabenddf8ef8f2012-04-15 06:44:37 +0000713 .ndo_set_rx_mode = macvlan_set_mac_lists,
Eric Dumazetbc661542010-06-24 00:54:21 +0000714 .ndo_get_stats64 = macvlan_dev_get_stats64,
Stephen Hemminger54a30c92008-11-19 21:51:06 -0800715 .ndo_validate_addr = eth_validate_addr,
John Fastabend8d13e672011-06-06 04:27:16 +0000716 .ndo_vlan_rx_add_vid = macvlan_vlan_rx_add_vid,
717 .ndo_vlan_rx_kill_vid = macvlan_vlan_rx_kill_vid,
John Fastabenddf8ef8f2012-04-15 06:44:37 +0000718 .ndo_fdb_add = macvlan_fdb_add,
719 .ndo_fdb_del = macvlan_fdb_del,
720 .ndo_fdb_dump = ndo_dflt_fdb_dump,
Stephen Hemminger54a30c92008-11-19 21:51:06 -0800721};
722
Herbert Xu8a357472010-07-21 21:44:31 +0000723void macvlan_common_setup(struct net_device *dev)
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700724{
725 ether_setup(dev);
726
Neil Horman550fd082011-07-26 06:05:38 +0000727 dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
Vlad Yasevich87ab7f62013-03-07 10:21:48 +0000728 dev->priv_flags |= IFF_UNICAST_FLT;
Stephen Hemminger54a30c92008-11-19 21:51:06 -0800729 dev->netdev_ops = &macvlan_netdev_ops;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700730 dev->destructor = free_netdev;
Lutz Jaenicke71740122013-08-28 13:34:31 +0200731 dev->header_ops = &macvlan_hard_header_ops;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700732 dev->ethtool_ops = &macvlan_ethtool_ops;
Herbert Xu8a357472010-07-21 21:44:31 +0000733}
734EXPORT_SYMBOL_GPL(macvlan_common_setup);
735
736static void macvlan_setup(struct net_device *dev)
737{
738 macvlan_common_setup(dev);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700739 dev->tx_queue_len = 0;
740}
741
742static int macvlan_port_create(struct net_device *dev)
743{
744 struct macvlan_port *port;
745 unsigned int i;
Jiri Pirkoab95bfe2010-06-01 21:52:08 +0000746 int err;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700747
748 if (dev->type != ARPHRD_ETHER || dev->flags & IFF_LOOPBACK)
749 return -EINVAL;
750
751 port = kzalloc(sizeof(*port), GFP_KERNEL);
752 if (port == NULL)
753 return -ENOMEM;
754
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +0000755 port->passthru = false;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700756 port->dev = dev;
757 INIT_LIST_HEAD(&port->vlans);
758 for (i = 0; i < MACVLAN_HASH_SIZE; i++)
759 INIT_HLIST_HEAD(&port->vlan_hash[i]);
Jiri Pirkoab95bfe2010-06-01 21:52:08 +0000760
Jiri Pirkoa35e2c12010-06-15 03:27:57 +0000761 err = netdev_rx_handler_register(dev, macvlan_handle_frame, port);
762 if (err)
Jiri Pirkoab95bfe2010-06-01 21:52:08 +0000763 kfree(port);
Eric Dumazetd9351562011-05-20 14:59:23 -0400764 else
765 dev->priv_flags |= IFF_MACVLAN_PORT;
Jiri Pirkoab95bfe2010-06-01 21:52:08 +0000766 return err;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700767}
768
769static void macvlan_port_destroy(struct net_device *dev)
770{
Eric Dumazete052f7e2013-03-30 10:08:44 +0000771 struct macvlan_port *port = macvlan_port_get_rtnl(dev);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700772
Jiri Pirkoa35e2c12010-06-15 03:27:57 +0000773 dev->priv_flags &= ~IFF_MACVLAN_PORT;
Jiri Pirkoab95bfe2010-06-01 21:52:08 +0000774 netdev_rx_handler_unregister(dev);
Lai Jiangshan6e070ae2011-03-18 12:00:07 +0800775 kfree_rcu(port, rcu);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700776}
777
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700778static int macvlan_validate(struct nlattr *tb[], struct nlattr *data[])
779{
780 if (tb[IFLA_ADDRESS]) {
781 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
782 return -EINVAL;
783 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
784 return -EADDRNOTAVAIL;
785 }
Arnd Bergmann27c0b1a2009-11-26 06:07:11 +0000786
Michael S. Tsirkin15127472013-08-05 18:25:54 +0300787 if (data && data[IFLA_MACVLAN_FLAGS] &&
788 nla_get_u16(data[IFLA_MACVLAN_FLAGS]) & ~MACVLAN_FLAG_NOPROMISC)
789 return -EINVAL;
790
Arnd Bergmann27c0b1a2009-11-26 06:07:11 +0000791 if (data && data[IFLA_MACVLAN_MODE]) {
792 switch (nla_get_u32(data[IFLA_MACVLAN_MODE])) {
793 case MACVLAN_MODE_PRIVATE:
794 case MACVLAN_MODE_VEPA:
795 case MACVLAN_MODE_BRIDGE:
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +0000796 case MACVLAN_MODE_PASSTHRU:
Arnd Bergmann27c0b1a2009-11-26 06:07:11 +0000797 break;
798 default:
799 return -EINVAL;
800 }
801 }
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700802 return 0;
803}
804
Arnd Bergmannfc0663d2010-01-30 12:23:40 +0000805int macvlan_common_newlink(struct net *src_net, struct net_device *dev,
Vlad Yasevich2f6a1b62013-12-11 13:27:11 -0500806 struct nlattr *tb[], struct nlattr *data[])
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700807{
808 struct macvlan_dev *vlan = netdev_priv(dev);
809 struct macvlan_port *port;
810 struct net_device *lowerdev;
811 int err;
812
813 if (!tb[IFLA_LINK])
814 return -EINVAL;
815
Eric W. Biederman81adee42009-11-08 00:53:51 -0800816 lowerdev = __dev_get_by_index(src_net, nla_get_u32(tb[IFLA_LINK]));
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700817 if (lowerdev == NULL)
818 return -ENODEV;
819
Kevin Wallaced70f2cf2013-12-03 02:55:22 -0800820 /* When creating macvlans or macvtaps on top of other macvlans - use
Eric Biedermanb0832a22009-03-13 13:15:37 -0700821 * the real device as the lowerdev.
Patrick McHardya6ca5f12008-01-10 22:39:28 -0800822 */
Kevin Wallaced70f2cf2013-12-03 02:55:22 -0800823 if (netif_is_macvlan(lowerdev))
824 lowerdev = macvlan_dev_real_dev(lowerdev);
Patrick McHardya6ca5f12008-01-10 22:39:28 -0800825
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700826 if (!tb[IFLA_MTU])
827 dev->mtu = lowerdev->mtu;
828 else if (dev->mtu > lowerdev->mtu)
829 return -EINVAL;
830
831 if (!tb[IFLA_ADDRESS])
Danny Kukawka7ce5d222012-02-15 06:45:40 +0000832 eth_hw_addr_random(dev);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700833
Jiri Pirkoa35e2c12010-06-15 03:27:57 +0000834 if (!macvlan_port_exists(lowerdev)) {
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700835 err = macvlan_port_create(lowerdev);
836 if (err < 0)
837 return err;
838 }
Eric Dumazete052f7e2013-03-30 10:08:44 +0000839 port = macvlan_port_get_rtnl(lowerdev);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700840
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +0000841 /* Only 1 macvlan device can be created in passthru mode */
842 if (port->passthru)
843 return -EINVAL;
844
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700845 vlan->lowerdev = lowerdev;
846 vlan->dev = dev;
847 vlan->port = port;
Vlad Yasevich2be5c762013-06-25 16:04:21 -0400848 vlan->set_features = MACVLAN_FEATURES;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700849
Arnd Bergmann27c0b1a2009-11-26 06:07:11 +0000850 vlan->mode = MACVLAN_MODE_VEPA;
851 if (data && data[IFLA_MACVLAN_MODE])
852 vlan->mode = nla_get_u32(data[IFLA_MACVLAN_MODE]);
853
John Fastabenddf8ef8f2012-04-15 06:44:37 +0000854 if (data && data[IFLA_MACVLAN_FLAGS])
855 vlan->flags = nla_get_u16(data[IFLA_MACVLAN_FLAGS]);
856
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +0000857 if (vlan->mode == MACVLAN_MODE_PASSTHRU) {
Eric W. Biedermand5cd92442011-03-21 18:22:22 -0700858 if (port->count)
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +0000859 return -EINVAL;
860 port->passthru = true;
Bjørn Mork8b986042013-08-30 18:08:47 +0200861 eth_hw_addr_inherit(dev, lowerdev);
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +0000862 }
863
John Fastabend47d4ab92013-10-21 14:28:02 -0700864 port->count += 1;
865 err = register_netdevice(dev);
866 if (err < 0)
867 goto destroy_port;
868
John Fastabenda6cc0cf2013-11-06 09:54:46 -0800869 dev->priv_flags |= IFF_MACVLAN;
Jiri Pirko7cd43db2013-01-03 22:48:50 +0000870 err = netdev_upper_dev_link(lowerdev, dev);
871 if (err)
872 goto destroy_port;
873
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700874
Jiri Pirko233c7df2013-05-09 04:23:40 +0000875 list_add_tail_rcu(&vlan->list, &port->vlans);
Patrick Mullaneyfc4a7482009-12-03 15:59:22 -0800876 netif_stacked_transfer_operstate(lowerdev, dev);
Jiri Pirkof16d3d52010-05-24 07:02:25 +0000877
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700878 return 0;
Jiri Pirkof16d3d52010-05-24 07:02:25 +0000879
880destroy_port:
Eric W. Biedermand5cd92442011-03-21 18:22:22 -0700881 port->count -= 1;
882 if (!port->count)
Jiri Pirkof16d3d52010-05-24 07:02:25 +0000883 macvlan_port_destroy(lowerdev);
884
885 return err;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700886}
Arnd Bergmannfc0663d2010-01-30 12:23:40 +0000887EXPORT_SYMBOL_GPL(macvlan_common_newlink);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700888
Arnd Bergmannfc0663d2010-01-30 12:23:40 +0000889static int macvlan_newlink(struct net *src_net, struct net_device *dev,
890 struct nlattr *tb[], struct nlattr *data[])
891{
Vlad Yasevich2f6a1b62013-12-11 13:27:11 -0500892 return macvlan_common_newlink(src_net, dev, tb, data);
Arnd Bergmannfc0663d2010-01-30 12:23:40 +0000893}
894
895void macvlan_dellink(struct net_device *dev, struct list_head *head)
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700896{
897 struct macvlan_dev *vlan = netdev_priv(dev);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700898
Jiri Pirko233c7df2013-05-09 04:23:40 +0000899 list_del_rcu(&vlan->list);
Eric Dumazet23289a32009-10-27 07:06:36 +0000900 unregister_netdevice_queue(dev, head);
Jiri Pirko7cd43db2013-01-03 22:48:50 +0000901 netdev_upper_dev_unlink(vlan->lowerdev, dev);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700902}
Arnd Bergmannfc0663d2010-01-30 12:23:40 +0000903EXPORT_SYMBOL_GPL(macvlan_dellink);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700904
Arnd Bergmann27c0b1a2009-11-26 06:07:11 +0000905static int macvlan_changelink(struct net_device *dev,
906 struct nlattr *tb[], struct nlattr *data[])
907{
908 struct macvlan_dev *vlan = netdev_priv(dev);
Michael S. Tsirkin266e8342013-08-01 13:43:19 +0300909 enum macvlan_mode mode;
910 bool set_mode = false;
911
912 /* Validate mode, but don't set yet: setting flags may fail. */
913 if (data && data[IFLA_MACVLAN_MODE]) {
914 set_mode = true;
915 mode = nla_get_u32(data[IFLA_MACVLAN_MODE]);
916 /* Passthrough mode can't be set or cleared dynamically */
917 if ((mode == MACVLAN_MODE_PASSTHRU) !=
918 (vlan->mode == MACVLAN_MODE_PASSTHRU))
919 return -EINVAL;
920 }
Michael S. Tsirkin99ffc3e2013-06-13 10:07:29 +0300921
John Fastabenddf8ef8f2012-04-15 06:44:37 +0000922 if (data && data[IFLA_MACVLAN_FLAGS]) {
923 __u16 flags = nla_get_u16(data[IFLA_MACVLAN_FLAGS]);
924 bool promisc = (flags ^ vlan->flags) & MACVLAN_FLAG_NOPROMISC;
Michael S. Tsirkin99ffc3e2013-06-13 10:07:29 +0300925 if (vlan->port->passthru && promisc) {
926 int err;
John Fastabenddf8ef8f2012-04-15 06:44:37 +0000927
Michael S. Tsirkin99ffc3e2013-06-13 10:07:29 +0300928 if (flags & MACVLAN_FLAG_NOPROMISC)
929 err = dev_set_promiscuity(vlan->lowerdev, -1);
930 else
931 err = dev_set_promiscuity(vlan->lowerdev, 1);
932 if (err < 0)
933 return err;
934 }
John Fastabenddf8ef8f2012-04-15 06:44:37 +0000935 vlan->flags = flags;
936 }
Michael S. Tsirkin266e8342013-08-01 13:43:19 +0300937 if (set_mode)
938 vlan->mode = mode;
Arnd Bergmann27c0b1a2009-11-26 06:07:11 +0000939 return 0;
940}
941
942static size_t macvlan_get_size(const struct net_device *dev)
943{
Eric Dumazet01fe9442013-01-17 13:30:49 -0800944 return (0
945 + nla_total_size(4) /* IFLA_MACVLAN_MODE */
946 + nla_total_size(2) /* IFLA_MACVLAN_FLAGS */
947 );
Arnd Bergmann27c0b1a2009-11-26 06:07:11 +0000948}
949
950static int macvlan_fill_info(struct sk_buff *skb,
951 const struct net_device *dev)
952{
953 struct macvlan_dev *vlan = netdev_priv(dev);
954
David S. Milleread9a762012-04-01 20:23:06 -0400955 if (nla_put_u32(skb, IFLA_MACVLAN_MODE, vlan->mode))
956 goto nla_put_failure;
John Fastabenddf8ef8f2012-04-15 06:44:37 +0000957 if (nla_put_u16(skb, IFLA_MACVLAN_FLAGS, vlan->flags))
958 goto nla_put_failure;
Arnd Bergmann27c0b1a2009-11-26 06:07:11 +0000959 return 0;
960
961nla_put_failure:
962 return -EMSGSIZE;
963}
964
965static const struct nla_policy macvlan_policy[IFLA_MACVLAN_MAX + 1] = {
John Fastabenddf8ef8f2012-04-15 06:44:37 +0000966 [IFLA_MACVLAN_MODE] = { .type = NLA_U32 },
967 [IFLA_MACVLAN_FLAGS] = { .type = NLA_U16 },
Arnd Bergmann27c0b1a2009-11-26 06:07:11 +0000968};
969
Arnd Bergmannfc0663d2010-01-30 12:23:40 +0000970int macvlan_link_register(struct rtnl_link_ops *ops)
971{
972 /* common fields */
973 ops->priv_size = sizeof(struct macvlan_dev);
Arnd Bergmannfc0663d2010-01-30 12:23:40 +0000974 ops->validate = macvlan_validate;
975 ops->maxtype = IFLA_MACVLAN_MAX;
976 ops->policy = macvlan_policy;
977 ops->changelink = macvlan_changelink;
978 ops->get_size = macvlan_get_size;
979 ops->fill_info = macvlan_fill_info;
980
981 return rtnl_link_register(ops);
982};
983EXPORT_SYMBOL_GPL(macvlan_link_register);
984
985static struct rtnl_link_ops macvlan_link_ops = {
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700986 .kind = "macvlan",
Herbert Xu8a357472010-07-21 21:44:31 +0000987 .setup = macvlan_setup,
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700988 .newlink = macvlan_newlink,
989 .dellink = macvlan_dellink,
990};
991
992static int macvlan_device_event(struct notifier_block *unused,
993 unsigned long event, void *ptr)
994{
Jiri Pirko351638e2013-05-28 01:30:21 +0000995 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700996 struct macvlan_dev *vlan, *next;
997 struct macvlan_port *port;
Eric Dumazet226bd342011-05-08 23:17:57 +0000998 LIST_HEAD(list_kill);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700999
Jiri Pirkoa35e2c12010-06-15 03:27:57 +00001000 if (!macvlan_port_exists(dev))
Patrick McHardyb863ceb2007-07-14 18:55:06 -07001001 return NOTIFY_DONE;
1002
Eric Dumazete052f7e2013-03-30 10:08:44 +00001003 port = macvlan_port_get_rtnl(dev);
Jiri Pirkoa35e2c12010-06-15 03:27:57 +00001004
Patrick McHardyb863ceb2007-07-14 18:55:06 -07001005 switch (event) {
1006 case NETDEV_CHANGE:
1007 list_for_each_entry(vlan, &port->vlans, list)
Patrick Mullaneyfc4a7482009-12-03 15:59:22 -08001008 netif_stacked_transfer_operstate(vlan->lowerdev,
1009 vlan->dev);
Patrick McHardyb863ceb2007-07-14 18:55:06 -07001010 break;
1011 case NETDEV_FEAT_CHANGE:
1012 list_for_each_entry(vlan, &port->vlans, list) {
1013 vlan->dev->features = dev->features & MACVLAN_FEATURES;
Patrick McHardy8c2acc52009-11-23 14:18:53 -08001014 vlan->dev->gso_max_size = dev->gso_max_size;
Patrick McHardyb863ceb2007-07-14 18:55:06 -07001015 netdev_features_change(vlan->dev);
1016 }
1017 break;
1018 case NETDEV_UNREGISTER:
David Lamparter3b27e102010-09-17 03:22:19 +00001019 /* twiddle thumbs on netns device moves */
1020 if (dev->reg_state != NETREG_UNREGISTERING)
1021 break;
1022
Patrick McHardyb863ceb2007-07-14 18:55:06 -07001023 list_for_each_entry_safe(vlan, next, &port->vlans, list)
Eric Dumazet226bd342011-05-08 23:17:57 +00001024 vlan->dev->rtnl_link_ops->dellink(vlan->dev, &list_kill);
1025 unregister_netdevice_many(&list_kill);
1026 list_del(&list_kill);
Patrick McHardyb863ceb2007-07-14 18:55:06 -07001027 break;
Jiri Pirko1c01fe12010-03-10 10:30:19 +00001028 case NETDEV_PRE_TYPE_CHANGE:
1029 /* Forbid underlaying device to change its type. */
1030 return NOTIFY_BAD;
Patrick McHardyb863ceb2007-07-14 18:55:06 -07001031 }
1032 return NOTIFY_DONE;
1033}
1034
1035static struct notifier_block macvlan_notifier_block __read_mostly = {
1036 .notifier_call = macvlan_device_event,
1037};
1038
1039static int __init macvlan_init_module(void)
1040{
1041 int err;
1042
1043 register_netdevice_notifier(&macvlan_notifier_block);
Patrick McHardyb863ceb2007-07-14 18:55:06 -07001044
Arnd Bergmannfc0663d2010-01-30 12:23:40 +00001045 err = macvlan_link_register(&macvlan_link_ops);
Patrick McHardyb863ceb2007-07-14 18:55:06 -07001046 if (err < 0)
1047 goto err1;
1048 return 0;
1049err1:
Patrick McHardyb863ceb2007-07-14 18:55:06 -07001050 unregister_netdevice_notifier(&macvlan_notifier_block);
1051 return err;
1052}
1053
1054static void __exit macvlan_cleanup_module(void)
1055{
1056 rtnl_link_unregister(&macvlan_link_ops);
Patrick McHardyb863ceb2007-07-14 18:55:06 -07001057 unregister_netdevice_notifier(&macvlan_notifier_block);
1058}
1059
1060module_init(macvlan_init_module);
1061module_exit(macvlan_cleanup_module);
1062
1063MODULE_LICENSE("GPL");
1064MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>");
1065MODULE_DESCRIPTION("Driver for MAC address based VLANs");
1066MODULE_ALIAS_RTNL_LINK("macvlan");