blob: 86f6c6292c2726c6991f305bc8794a5af2c648af [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>
Herbert Xu412ca152014-04-17 13:45:59 +080033#include <linux/workqueue.h>
Patrick McHardyb863ceb2007-07-14 18:55:06 -070034#include <net/rtnetlink.h>
Arnd Bergmann618e1b72009-11-26 06:07:10 +000035#include <net/xfrm.h>
dingtianhong688cea82014-05-30 16:00:56 +080036#include <linux/netpoll.h>
Patrick McHardyb863ceb2007-07-14 18:55:06 -070037
Michael Braun79cf79a2014-09-25 16:31:08 +020038#define MACVLAN_HASH_BITS 8
39#define MACVLAN_HASH_SIZE (1<<MACVLAN_HASH_BITS)
Nicolas Dichtel07d92d52014-09-17 10:08:08 +020040#define MACVLAN_BC_QUEUE_LEN 1000
Patrick McHardyb863ceb2007-07-14 18:55:06 -070041
42struct macvlan_port {
43 struct net_device *dev;
44 struct hlist_head vlan_hash[MACVLAN_HASH_SIZE];
45 struct list_head vlans;
Jiri Pirko8b37ef02010-06-07 01:36:29 +000046 struct rcu_head rcu;
Herbert Xu412ca152014-04-17 13:45:59 +080047 struct sk_buff_head bc_queue;
48 struct work_struct bc_work;
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +000049 bool passthru;
David S. Miller5e3c5162014-08-14 14:32:49 -070050 int count;
Michael Braun79cf79a2014-09-25 16:31:08 +020051 struct hlist_head vlan_source_hash[MACVLAN_HASH_SIZE];
52};
53
54struct macvlan_source_entry {
55 struct hlist_node hlist;
56 struct macvlan_dev *vlan;
57 unsigned char addr[6+2] __aligned(sizeof(u16));
58 struct rcu_head rcu;
Patrick McHardyb863ceb2007-07-14 18:55:06 -070059};
60
Herbert Xu412ca152014-04-17 13:45:59 +080061struct macvlan_skb_cb {
62 const struct macvlan_dev *src;
63};
64
65#define MACVLAN_SKB_CB(__skb) ((struct macvlan_skb_cb *)&((__skb)->cb[0]))
66
Eric W. Biedermand5cd92442011-03-21 18:22:22 -070067static void macvlan_port_destroy(struct net_device *dev);
68
Michael Braun79cf79a2014-09-25 16:31:08 +020069/* Hash Ethernet address */
70static u32 macvlan_eth_hash(const unsigned char *addr)
71{
72 u64 value = get_unaligned((u64 *)addr);
73
74 /* only want 6 bytes */
75#ifdef __BIG_ENDIAN
76 value >>= 16;
77#else
78 value <<= 16;
79#endif
80 return hash_64(value, MACVLAN_HASH_BITS);
81}
82
Eric Dumazete052f7e2013-03-30 10:08:44 +000083static struct macvlan_port *macvlan_port_get_rcu(const struct net_device *dev)
84{
85 return rcu_dereference(dev->rx_handler_data);
86}
87
88static struct macvlan_port *macvlan_port_get_rtnl(const struct net_device *dev)
89{
90 return rtnl_dereference(dev->rx_handler_data);
91}
92
Jiri Pirkoa35e2c12010-06-15 03:27:57 +000093#define macvlan_port_exists(dev) (dev->priv_flags & IFF_MACVLAN_PORT)
94
Patrick McHardyb863ceb2007-07-14 18:55:06 -070095static struct macvlan_dev *macvlan_hash_lookup(const struct macvlan_port *port,
96 const unsigned char *addr)
97{
98 struct macvlan_dev *vlan;
Michael Braun79cf79a2014-09-25 16:31:08 +020099 u32 idx = macvlan_eth_hash(addr);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700100
Michael Braun79cf79a2014-09-25 16:31:08 +0200101 hlist_for_each_entry_rcu(vlan, &port->vlan_hash[idx], hlist) {
Joe Perchesa6700db2012-05-09 17:04:04 +0000102 if (ether_addr_equal_64bits(vlan->dev->dev_addr, addr))
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700103 return vlan;
104 }
105 return NULL;
106}
107
Michael Braun79cf79a2014-09-25 16:31:08 +0200108static struct macvlan_source_entry *macvlan_hash_lookup_source(
109 const struct macvlan_dev *vlan,
110 const unsigned char *addr)
111{
112 struct macvlan_source_entry *entry;
113 u32 idx = macvlan_eth_hash(addr);
114 struct hlist_head *h = &vlan->port->vlan_source_hash[idx];
115
116 hlist_for_each_entry_rcu(entry, h, hlist) {
117 if (ether_addr_equal_64bits(entry->addr, addr) &&
118 entry->vlan == vlan)
119 return entry;
120 }
121 return NULL;
122}
123
124static int macvlan_hash_add_source(struct macvlan_dev *vlan,
125 const unsigned char *addr)
126{
127 struct macvlan_port *port = vlan->port;
128 struct macvlan_source_entry *entry;
129 struct hlist_head *h;
130
131 entry = macvlan_hash_lookup_source(vlan, addr);
132 if (entry)
133 return 0;
134
135 entry = kmalloc(sizeof(*entry), GFP_KERNEL);
136 if (!entry)
137 return -ENOMEM;
138
139 ether_addr_copy(entry->addr, addr);
140 entry->vlan = vlan;
141 h = &port->vlan_source_hash[macvlan_eth_hash(addr)];
142 hlist_add_head_rcu(&entry->hlist, h);
143 vlan->macaddr_count++;
144
145 return 0;
146}
147
Eric Biedermanf9ac30f2009-03-13 13:16:13 -0700148static void macvlan_hash_add(struct macvlan_dev *vlan)
149{
150 struct macvlan_port *port = vlan->port;
151 const unsigned char *addr = vlan->dev->dev_addr;
Michael Braun79cf79a2014-09-25 16:31:08 +0200152 u32 idx = macvlan_eth_hash(addr);
Eric Biedermanf9ac30f2009-03-13 13:16:13 -0700153
Michael Braun79cf79a2014-09-25 16:31:08 +0200154 hlist_add_head_rcu(&vlan->hlist, &port->vlan_hash[idx]);
155}
156
157static void macvlan_hash_del_source(struct macvlan_source_entry *entry)
158{
159 hlist_del_rcu(&entry->hlist);
160 kfree_rcu(entry, rcu);
Eric Biedermanf9ac30f2009-03-13 13:16:13 -0700161}
162
Eric Dumazet449f4542011-05-19 12:24:16 +0000163static void macvlan_hash_del(struct macvlan_dev *vlan, bool sync)
Eric Biedermanf9ac30f2009-03-13 13:16:13 -0700164{
165 hlist_del_rcu(&vlan->hlist);
Eric Dumazet449f4542011-05-19 12:24:16 +0000166 if (sync)
167 synchronize_rcu();
Eric Biedermanf9ac30f2009-03-13 13:16:13 -0700168}
169
170static void macvlan_hash_change_addr(struct macvlan_dev *vlan,
171 const unsigned char *addr)
172{
Eric Dumazet449f4542011-05-19 12:24:16 +0000173 macvlan_hash_del(vlan, true);
Eric Biedermanf9ac30f2009-03-13 13:16:13 -0700174 /* Now that we are unhashed it is safe to change the device
175 * address without confusing packet delivery.
176 */
177 memcpy(vlan->dev->dev_addr, addr, ETH_ALEN);
178 macvlan_hash_add(vlan);
179}
180
181static int macvlan_addr_busy(const struct macvlan_port *port,
182 const unsigned char *addr)
183{
184 /* Test to see if the specified multicast address is
185 * currently in use by the underlying device or
186 * another macvlan.
187 */
Joe Perchesa6700db2012-05-09 17:04:04 +0000188 if (ether_addr_equal_64bits(port->dev->dev_addr, addr))
Eric Biedermanf9ac30f2009-03-13 13:16:13 -0700189 return 1;
190
191 if (macvlan_hash_lookup(port, addr))
192 return 1;
193
194 return 0;
195}
196
Arnd Bergmanna1e514c2009-11-26 06:07:09 +0000197
Arnd Bergmannfc0663d2010-01-30 12:23:40 +0000198static int macvlan_broadcast_one(struct sk_buff *skb,
199 const struct macvlan_dev *vlan,
Arnd Bergmann618e1b72009-11-26 06:07:10 +0000200 const struct ethhdr *eth, bool local)
Arnd Bergmanna1e514c2009-11-26 06:07:09 +0000201{
Arnd Bergmannfc0663d2010-01-30 12:23:40 +0000202 struct net_device *dev = vlan->dev;
Arnd Bergmanna1e514c2009-11-26 06:07:09 +0000203
Arnd Bergmann618e1b72009-11-26 06:07:10 +0000204 if (local)
Herbert Xu412ca152014-04-17 13:45:59 +0800205 return __dev_forward_skb(dev, skb);
Arnd Bergmann618e1b72009-11-26 06:07:10 +0000206
Arnd Bergmanna1e514c2009-11-26 06:07:09 +0000207 skb->dev = dev;
Joe Perchesa6700db2012-05-09 17:04:04 +0000208 if (ether_addr_equal_64bits(eth->h_dest, dev->broadcast))
Arnd Bergmanna1e514c2009-11-26 06:07:09 +0000209 skb->pkt_type = PACKET_BROADCAST;
210 else
211 skb->pkt_type = PACKET_MULTICAST;
212
Herbert Xu412ca152014-04-17 13:45:59 +0800213 return 0;
Arnd Bergmanna1e514c2009-11-26 06:07:09 +0000214}
215
Eric Dumazet3807ff52013-02-07 16:41:02 +0000216static u32 macvlan_hash_mix(const struct macvlan_dev *vlan)
217{
218 return (u32)(((unsigned long)vlan) >> L1_CACHE_SHIFT);
219}
220
221
222static unsigned int mc_hash(const struct macvlan_dev *vlan,
223 const unsigned char *addr)
Eric Dumazetcd431e72013-02-05 20:22:50 +0000224{
225 u32 val = __get_unaligned_cpu32(addr + 2);
226
Eric Dumazet3807ff52013-02-07 16:41:02 +0000227 val ^= macvlan_hash_mix(vlan);
Eric Dumazetcd431e72013-02-05 20:22:50 +0000228 return hash_32(val, MACVLAN_MC_FILTER_BITS);
229}
230
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700231static void macvlan_broadcast(struct sk_buff *skb,
Arnd Bergmann618e1b72009-11-26 06:07:10 +0000232 const struct macvlan_port *port,
233 struct net_device *src,
234 enum macvlan_mode mode)
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700235{
236 const struct ethhdr *eth = eth_hdr(skb);
237 const struct macvlan_dev *vlan;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700238 struct sk_buff *nskb;
239 unsigned int i;
Arnd Bergmanna1e514c2009-11-26 06:07:09 +0000240 int err;
Eric Dumazet3807ff52013-02-07 16:41:02 +0000241 unsigned int hash;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700242
Patrick McHardyefbbced2008-11-26 15:30:48 -0800243 if (skb->protocol == htons(ETH_P_PAUSE))
244 return;
245
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700246 for (i = 0; i < MACVLAN_HASH_SIZE; i++) {
Sasha Levinb67bfe02013-02-27 17:06:00 -0800247 hlist_for_each_entry_rcu(vlan, &port->vlan_hash[i], hlist) {
Arnd Bergmann618e1b72009-11-26 06:07:10 +0000248 if (vlan->dev == src || !(vlan->mode & mode))
249 continue;
250
Eric Dumazet3807ff52013-02-07 16:41:02 +0000251 hash = mc_hash(vlan, eth->h_dest);
Eric Dumazetcd431e72013-02-05 20:22:50 +0000252 if (!test_bit(hash, vlan->mc_filter))
253 continue;
Herbert Xude9e8f32013-09-07 12:27:11 +1000254
255 err = NET_RX_DROP;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700256 nskb = skb_clone(skb, GFP_ATOMIC);
Herbert Xude9e8f32013-09-07 12:27:11 +1000257 if (likely(nskb))
258 err = macvlan_broadcast_one(
259 nskb, vlan, eth,
Herbert Xu412ca152014-04-17 13:45:59 +0800260 mode == MACVLAN_MODE_BRIDGE) ?:
261 netif_rx_ni(nskb);
Arnd Bergmanna1e514c2009-11-26 06:07:09 +0000262 macvlan_count_rx(vlan, skb->len + ETH_HLEN,
jbaron@akamai.com4c979932014-10-10 03:13:27 +0000263 err == NET_RX_SUCCESS, true);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700264 }
265 }
266}
267
Herbert Xu412ca152014-04-17 13:45:59 +0800268static void macvlan_process_broadcast(struct work_struct *w)
269{
270 struct macvlan_port *port = container_of(w, struct macvlan_port,
271 bc_work);
272 struct sk_buff *skb;
273 struct sk_buff_head list;
274
Eric Dumazetfe0ca732014-10-22 19:43:46 -0700275 __skb_queue_head_init(&list);
Herbert Xu412ca152014-04-17 13:45:59 +0800276
277 spin_lock_bh(&port->bc_queue.lock);
278 skb_queue_splice_tail_init(&port->bc_queue, &list);
279 spin_unlock_bh(&port->bc_queue.lock);
280
281 while ((skb = __skb_dequeue(&list))) {
282 const struct macvlan_dev *src = MACVLAN_SKB_CB(skb)->src;
283
284 rcu_read_lock();
285
286 if (!src)
287 /* frame comes from an external address */
288 macvlan_broadcast(skb, port, NULL,
289 MACVLAN_MODE_PRIVATE |
290 MACVLAN_MODE_VEPA |
291 MACVLAN_MODE_PASSTHRU|
292 MACVLAN_MODE_BRIDGE);
293 else if (src->mode == MACVLAN_MODE_VEPA)
294 /* flood to everyone except source */
295 macvlan_broadcast(skb, port, src->dev,
296 MACVLAN_MODE_VEPA |
297 MACVLAN_MODE_BRIDGE);
298 else
299 /*
300 * flood only to VEPA ports, bridge ports
301 * already saw the frame on the way out.
302 */
303 macvlan_broadcast(skb, port, src->dev,
304 MACVLAN_MODE_VEPA);
305
306 rcu_read_unlock();
307
308 kfree_skb(skb);
309 }
310}
311
312static void macvlan_broadcast_enqueue(struct macvlan_port *port,
313 struct sk_buff *skb)
314{
Herbert Xue676f192014-04-22 17:15:34 +0800315 struct sk_buff *nskb;
Herbert Xu412ca152014-04-17 13:45:59 +0800316 int err = -ENOMEM;
317
Herbert Xue676f192014-04-22 17:15:34 +0800318 nskb = skb_clone(skb, GFP_ATOMIC);
319 if (!nskb)
Herbert Xu412ca152014-04-17 13:45:59 +0800320 goto err;
321
322 spin_lock(&port->bc_queue.lock);
Nicolas Dichtel07d92d52014-09-17 10:08:08 +0200323 if (skb_queue_len(&port->bc_queue) < MACVLAN_BC_QUEUE_LEN) {
Herbert Xue676f192014-04-22 17:15:34 +0800324 __skb_queue_tail(&port->bc_queue, nskb);
Herbert Xu412ca152014-04-17 13:45:59 +0800325 err = 0;
326 }
327 spin_unlock(&port->bc_queue.lock);
328
329 if (err)
Herbert Xue676f192014-04-22 17:15:34 +0800330 goto free_nskb;
Herbert Xu412ca152014-04-17 13:45:59 +0800331
332 schedule_work(&port->bc_work);
333 return;
334
Herbert Xue676f192014-04-22 17:15:34 +0800335free_nskb:
336 kfree_skb(nskb);
Herbert Xu412ca152014-04-17 13:45:59 +0800337err:
338 atomic_long_inc(&skb->dev->rx_dropped);
339}
340
Michael Braun79cf79a2014-09-25 16:31:08 +0200341static void macvlan_flush_sources(struct macvlan_port *port,
342 struct macvlan_dev *vlan)
343{
344 int i;
345
346 for (i = 0; i < MACVLAN_HASH_SIZE; i++) {
347 struct hlist_node *h, *n;
348
349 hlist_for_each_safe(h, n, &port->vlan_source_hash[i]) {
350 struct macvlan_source_entry *entry;
351
352 entry = hlist_entry(h, struct macvlan_source_entry,
353 hlist);
354 if (entry->vlan == vlan)
355 macvlan_hash_del_source(entry);
356 }
357 }
358 vlan->macaddr_count = 0;
359}
360
361static void macvlan_forward_source_one(struct sk_buff *skb,
362 struct macvlan_dev *vlan)
363{
364 struct sk_buff *nskb;
365 struct net_device *dev;
366 int len;
367 int ret;
368
369 dev = vlan->dev;
370 if (unlikely(!(dev->flags & IFF_UP)))
371 return;
372
373 nskb = skb_clone(skb, GFP_ATOMIC);
374 if (!nskb)
375 return;
376
377 len = nskb->len + ETH_HLEN;
378 nskb->dev = dev;
379 nskb->pkt_type = PACKET_HOST;
380
381 ret = netif_rx(nskb);
jbaron@akamai.com4c979932014-10-10 03:13:27 +0000382 macvlan_count_rx(vlan, len, ret == NET_RX_SUCCESS, false);
Michael Braun79cf79a2014-09-25 16:31:08 +0200383}
384
385static void macvlan_forward_source(struct sk_buff *skb,
386 struct macvlan_port *port,
387 const unsigned char *addr)
388{
389 struct macvlan_source_entry *entry;
390 u32 idx = macvlan_eth_hash(addr);
391 struct hlist_head *h = &port->vlan_source_hash[idx];
392
393 hlist_for_each_entry_rcu(entry, h, hlist) {
394 if (ether_addr_equal_64bits(entry->addr, addr))
395 if (entry->vlan->dev->flags & IFF_UP)
396 macvlan_forward_source_one(skb, entry->vlan);
397 }
398}
399
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700400/* called under rcu_read_lock() from netif_receive_skb */
Jiri Pirko8a4eb572011-03-12 03:14:39 +0000401static rx_handler_result_t macvlan_handle_frame(struct sk_buff **pskb)
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700402{
Jiri Pirkoab95bfe2010-06-01 21:52:08 +0000403 struct macvlan_port *port;
Jiri Pirko8a4eb572011-03-12 03:14:39 +0000404 struct sk_buff *skb = *pskb;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700405 const struct ethhdr *eth = eth_hdr(skb);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700406 const struct macvlan_dev *vlan;
Arnd Bergmann618e1b72009-11-26 06:07:10 +0000407 const struct macvlan_dev *src;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700408 struct net_device *dev;
Sridhar Samudralaba018772010-07-27 09:10:07 +0000409 unsigned int len = 0;
jbaron@akamai.comd1dd91192014-10-10 03:13:31 +0000410 int ret;
411 rx_handler_result_t handle_res;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700412
Jiri Pirkoa35e2c12010-06-15 03:27:57 +0000413 port = macvlan_port_get_rcu(skb->dev);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700414 if (is_multicast_ether_addr(eth->h_dest)) {
Eric W. Biederman19bcf9f2015-10-09 13:44:54 -0500415 skb = ip_check_defrag(dev_net(skb->dev), skb, IP_DEFRAG_MACVLAN);
Eric Dumazetbc416d92011-10-06 10:28:31 +0000416 if (!skb)
417 return RX_HANDLER_CONSUMED;
Eric Dumazet4ec7ac12012-01-23 05:38:59 +0000418 eth = eth_hdr(skb);
Michael Braun79cf79a2014-09-25 16:31:08 +0200419 macvlan_forward_source(skb, port, eth->h_source);
Arnd Bergmann618e1b72009-11-26 06:07:10 +0000420 src = macvlan_hash_lookup(port, eth->h_source);
Herbert Xu412ca152014-04-17 13:45:59 +0800421 if (src && src->mode != MACVLAN_MODE_VEPA &&
422 src->mode != MACVLAN_MODE_BRIDGE) {
stephen hemminger729e72a2011-11-02 12:11:53 +0000423 /* forward to original port. */
424 vlan = src;
Herbert Xu412ca152014-04-17 13:45:59 +0800425 ret = macvlan_broadcast_one(skb, vlan, eth, 0) ?:
426 netif_rx(skb);
jbaron@akamai.comd1dd91192014-10-10 03:13:31 +0000427 handle_res = RX_HANDLER_CONSUMED;
stephen hemminger729e72a2011-11-02 12:11:53 +0000428 goto out;
429 }
430
Herbert Xu412ca152014-04-17 13:45:59 +0800431 MACVLAN_SKB_CB(skb)->src = src;
432 macvlan_broadcast_enqueue(port, skb);
433
Jiri Pirko8a4eb572011-03-12 03:14:39 +0000434 return RX_HANDLER_PASS;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700435 }
436
Michael Braun79cf79a2014-09-25 16:31:08 +0200437 macvlan_forward_source(skb, port, eth->h_source);
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +0000438 if (port->passthru)
Jiri Pirko233c7df2013-05-09 04:23:40 +0000439 vlan = list_first_or_null_rcu(&port->vlans,
440 struct macvlan_dev, list);
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +0000441 else
442 vlan = macvlan_hash_lookup(port, eth->h_dest);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700443 if (vlan == NULL)
Jiri Pirko8a4eb572011-03-12 03:14:39 +0000444 return RX_HANDLER_PASS;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700445
446 dev = vlan->dev;
447 if (unlikely(!(dev->flags & IFF_UP))) {
448 kfree_skb(skb);
Jiri Pirko8a4eb572011-03-12 03:14:39 +0000449 return RX_HANDLER_CONSUMED;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700450 }
Arnd Bergmanna1e514c2009-11-26 06:07:09 +0000451 len = skb->len + ETH_HLEN;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700452 skb = skb_share_check(skb, GFP_ATOMIC);
jbaron@akamai.comd1dd91192014-10-10 03:13:31 +0000453 if (!skb) {
454 ret = NET_RX_DROP;
455 handle_res = RX_HANDLER_CONSUMED;
Sridhar Samudralaba018772010-07-27 09:10:07 +0000456 goto out;
jbaron@akamai.comd1dd91192014-10-10 03:13:31 +0000457 }
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700458
459 skb->dev = dev;
460 skb->pkt_type = PACKET_HOST;
461
jbaron@akamai.comd1dd91192014-10-10 03:13:31 +0000462 ret = NET_RX_SUCCESS;
463 handle_res = RX_HANDLER_ANOTHER;
Sridhar Samudralaba018772010-07-27 09:10:07 +0000464out:
jbaron@akamai.com4c979932014-10-10 03:13:27 +0000465 macvlan_count_rx(vlan, len, ret == NET_RX_SUCCESS, false);
jbaron@akamai.comd1dd91192014-10-10 03:13:31 +0000466 return handle_res;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700467}
468
Arnd Bergmann618e1b72009-11-26 06:07:10 +0000469static int macvlan_queue_xmit(struct sk_buff *skb, struct net_device *dev)
470{
471 const struct macvlan_dev *vlan = netdev_priv(dev);
472 const struct macvlan_port *port = vlan->port;
473 const struct macvlan_dev *dest;
474
475 if (vlan->mode == MACVLAN_MODE_BRIDGE) {
476 const struct ethhdr *eth = (void *)skb->data;
477
478 /* send to other bridge ports directly */
479 if (is_multicast_ether_addr(eth->h_dest)) {
480 macvlan_broadcast(skb, port, dev, MACVLAN_MODE_BRIDGE);
481 goto xmit_world;
482 }
483
484 dest = macvlan_hash_lookup(port, eth->h_dest);
485 if (dest && dest->mode == MACVLAN_MODE_BRIDGE) {
David Warda37dd332011-05-19 02:53:20 +0000486 /* send to lowerdev first for its network taps */
David Wardcb2d0f32011-09-18 12:53:20 +0000487 dev_forward_skb(vlan->lowerdev, skb);
Arnd Bergmann618e1b72009-11-26 06:07:10 +0000488
489 return NET_XMIT_SUCCESS;
490 }
491 }
492
493xmit_world:
David S. Miller59b99972012-05-10 23:03:34 -0400494 skb->dev = vlan->lowerdev;
Arnd Bergmann618e1b72009-11-26 06:07:10 +0000495 return dev_queue_xmit(skb);
496}
497
dingtianhong688cea82014-05-30 16:00:56 +0800498static inline netdev_tx_t macvlan_netpoll_send_skb(struct macvlan_dev *vlan, struct sk_buff *skb)
499{
500#ifdef CONFIG_NET_POLL_CONTROLLER
501 if (vlan->netpoll)
502 netpoll_send_skb(vlan->netpoll, skb);
503#else
504 BUG();
505#endif
506 return NETDEV_TX_OK;
507}
508
stephen hemminger0db901b2013-12-27 12:06:46 -0800509static netdev_tx_t macvlan_start_xmit(struct sk_buff *skb,
510 struct net_device *dev)
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700511{
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700512 unsigned int len = skb->len;
513 int ret;
dingtianhong688cea82014-05-30 16:00:56 +0800514 struct macvlan_dev *vlan = netdev_priv(dev);
515
516 if (unlikely(netpoll_tx_running(dev)))
517 return macvlan_netpoll_send_skb(vlan, skb);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700518
John Fastabenda6cc0cf2013-11-06 09:54:46 -0800519 if (vlan->fwd_priv) {
520 skb->dev = vlan->lowerdev;
Jason Wangf663dd92014-01-10 16:18:26 +0800521 ret = dev_queue_xmit_accel(skb, vlan->fwd_priv);
John Fastabenda6cc0cf2013-11-06 09:54:46 -0800522 } else {
523 ret = macvlan_queue_xmit(skb, dev);
524 }
525
Eric Dumazet2d6c9ff2010-05-10 04:51:02 +0000526 if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) {
Li RongQingcdf3e272014-01-04 14:22:34 +0800527 struct vlan_pcpu_stats *pcpu_stats;
Eric Dumazet2c114552009-09-03 00:11:45 +0000528
Eric Dumazet8ffab512010-11-10 21:14:04 +0000529 pcpu_stats = this_cpu_ptr(vlan->pcpu_stats);
530 u64_stats_update_begin(&pcpu_stats->syncp);
531 pcpu_stats->tx_packets++;
532 pcpu_stats->tx_bytes += len;
533 u64_stats_update_end(&pcpu_stats->syncp);
534 } else {
535 this_cpu_inc(vlan->pcpu_stats->tx_dropped);
536 }
Patrick McHardycbbef5e2009-11-10 06:14:24 +0000537 return ret;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700538}
539
540static int macvlan_hard_header(struct sk_buff *skb, struct net_device *dev,
Stephen Hemminger3b04ddd2007-10-09 01:40:57 -0700541 unsigned short type, const void *daddr,
542 const void *saddr, unsigned len)
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700543{
544 const struct macvlan_dev *vlan = netdev_priv(dev);
545 struct net_device *lowerdev = vlan->lowerdev;
546
Stephen Hemminger0c4e8582007-10-09 01:36:32 -0700547 return dev_hard_header(skb, lowerdev, type, daddr,
548 saddr ? : dev->dev_addr, len);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700549}
550
Stephen Hemminger3b04ddd2007-10-09 01:40:57 -0700551static const struct header_ops macvlan_hard_header_ops = {
552 .create = macvlan_hard_header,
Stephen Hemminger3b04ddd2007-10-09 01:40:57 -0700553 .parse = eth_header_parse,
Stephen Hemminger3b04ddd2007-10-09 01:40:57 -0700554 .cache = eth_header_cache,
555 .cache_update = eth_header_cache_update,
556};
557
Jason Wangb13ba1b2014-01-10 16:18:25 +0800558static struct rtnl_link_ops macvlan_link_ops;
559
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700560static int macvlan_open(struct net_device *dev)
561{
562 struct macvlan_dev *vlan = netdev_priv(dev);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700563 struct net_device *lowerdev = vlan->lowerdev;
564 int err;
565
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +0000566 if (vlan->port->passthru) {
Michael S. Tsirkin78738142013-08-01 13:50:10 +0300567 if (!(vlan->flags & MACVLAN_FLAG_NOPROMISC)) {
568 err = dev_set_promiscuity(lowerdev, 1);
569 if (err < 0)
570 goto out;
571 }
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +0000572 goto hash_add;
573 }
574
Jason Wangb13ba1b2014-01-10 16:18:25 +0800575 if (lowerdev->features & NETIF_F_HW_L2FW_DOFFLOAD &&
576 dev->rtnl_link_ops == &macvlan_link_ops) {
John Fastabenda6cc0cf2013-11-06 09:54:46 -0800577 vlan->fwd_priv =
578 lowerdev->netdev_ops->ndo_dfwd_add_station(lowerdev, dev);
579
580 /* If we get a NULL pointer back, or if we get an error
581 * then we should just fall through to the non accelerated path
582 */
583 if (IS_ERR_OR_NULL(vlan->fwd_priv)) {
584 vlan->fwd_priv = NULL;
Jason Wangf663dd92014-01-10 16:18:26 +0800585 } else
John Fastabenda6cc0cf2013-11-06 09:54:46 -0800586 return 0;
John Fastabenda6cc0cf2013-11-06 09:54:46 -0800587 }
588
Eric Biedermanf9ac30f2009-03-13 13:16:13 -0700589 err = -EBUSY;
590 if (macvlan_addr_busy(vlan->port, dev->dev_addr))
591 goto out;
592
Jiri Pirkoa748ee22010-04-01 21:22:09 +0000593 err = dev_uc_add(lowerdev, dev->dev_addr);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700594 if (err < 0)
Wang Chenb89fb7d2008-07-14 20:57:07 -0700595 goto out;
596 if (dev->flags & IFF_ALLMULTI) {
597 err = dev_set_allmulti(lowerdev, 1);
598 if (err < 0)
599 goto del_unicast;
600 }
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +0000601
Vlad Yasevichefdbd2b2015-05-01 17:36:37 -0400602 if (dev->flags & IFF_PROMISC) {
603 err = dev_set_promiscuity(lowerdev, 1);
604 if (err < 0)
605 goto clear_multi;
606 }
607
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +0000608hash_add:
Eric Biedermanf9ac30f2009-03-13 13:16:13 -0700609 macvlan_hash_add(vlan);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700610 return 0;
Wang Chenb89fb7d2008-07-14 20:57:07 -0700611
Vlad Yasevichefdbd2b2015-05-01 17:36:37 -0400612clear_multi:
613 dev_set_allmulti(lowerdev, -1);
Wang Chenb89fb7d2008-07-14 20:57:07 -0700614del_unicast:
Jiri Pirkoa748ee22010-04-01 21:22:09 +0000615 dev_uc_del(lowerdev, dev->dev_addr);
Wang Chenb89fb7d2008-07-14 20:57:07 -0700616out:
John Fastabenda6cc0cf2013-11-06 09:54:46 -0800617 if (vlan->fwd_priv) {
618 lowerdev->netdev_ops->ndo_dfwd_del_station(lowerdev,
619 vlan->fwd_priv);
620 vlan->fwd_priv = NULL;
621 }
Wang Chenb89fb7d2008-07-14 20:57:07 -0700622 return err;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700623}
624
625static int macvlan_stop(struct net_device *dev)
626{
627 struct macvlan_dev *vlan = netdev_priv(dev);
628 struct net_device *lowerdev = vlan->lowerdev;
629
John Fastabenda6cc0cf2013-11-06 09:54:46 -0800630 if (vlan->fwd_priv) {
631 lowerdev->netdev_ops->ndo_dfwd_del_station(lowerdev,
632 vlan->fwd_priv);
633 vlan->fwd_priv = NULL;
634 return 0;
635 }
636
John Fastabenddf8ef8f2012-04-15 06:44:37 +0000637 dev_uc_unsync(lowerdev, dev);
638 dev_mc_unsync(lowerdev, dev);
639
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +0000640 if (vlan->port->passthru) {
John Fastabenddf8ef8f2012-04-15 06:44:37 +0000641 if (!(vlan->flags & MACVLAN_FLAG_NOPROMISC))
642 dev_set_promiscuity(lowerdev, -1);
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +0000643 goto hash_del;
644 }
645
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700646 if (dev->flags & IFF_ALLMULTI)
647 dev_set_allmulti(lowerdev, -1);
648
Vlad Yasevichefdbd2b2015-05-01 17:36:37 -0400649 if (dev->flags & IFF_PROMISC)
650 dev_set_promiscuity(lowerdev, -1);
651
Jiri Pirkoa748ee22010-04-01 21:22:09 +0000652 dev_uc_del(lowerdev, dev->dev_addr);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700653
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +0000654hash_del:
Eric Dumazet449f4542011-05-19 12:24:16 +0000655 macvlan_hash_del(vlan, !dev->dismantle);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700656 return 0;
657}
658
dingtianhonge289fd22014-05-30 14:32:49 +0800659static int macvlan_sync_address(struct net_device *dev, unsigned char *addr)
Patrick McHardyad5d20a2007-11-19 22:00:42 -0800660{
661 struct macvlan_dev *vlan = netdev_priv(dev);
662 struct net_device *lowerdev = vlan->lowerdev;
Patrick McHardyad5d20a2007-11-19 22:00:42 -0800663 int err;
664
dingtianhonge289fd22014-05-30 14:32:49 +0800665 if (!(dev->flags & IFF_UP)) {
666 /* Just copy in the new address */
667 ether_addr_copy(dev->dev_addr, addr);
668 } else {
669 /* Rehash and update the device filters */
670 if (macvlan_addr_busy(vlan->port, addr))
671 return -EBUSY;
672
673 if (!vlan->port->passthru) {
674 err = dev_uc_add(lowerdev, addr);
675 if (err)
676 return err;
677
678 dev_uc_del(lowerdev, dev->dev_addr);
679 }
680
681 macvlan_hash_change_addr(vlan, addr);
682 }
683 return 0;
684}
685
686static int macvlan_set_mac_address(struct net_device *dev, void *p)
687{
688 struct macvlan_dev *vlan = netdev_priv(dev);
689 struct sockaddr *addr = p;
690
Patrick McHardyad5d20a2007-11-19 22:00:42 -0800691 if (!is_valid_ether_addr(addr->sa_data))
692 return -EADDRNOTAVAIL;
693
dingtianhonge289fd22014-05-30 14:32:49 +0800694 if (vlan->mode == MACVLAN_MODE_PASSTHRU) {
695 dev_set_mac_address(vlan->lowerdev, addr);
696 return 0;
Eric Biedermanf9ac30f2009-03-13 13:16:13 -0700697 }
dingtianhonge289fd22014-05-30 14:32:49 +0800698
699 return macvlan_sync_address(dev, addr->sa_data);
Patrick McHardyad5d20a2007-11-19 22:00:42 -0800700}
701
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700702static void macvlan_change_rx_flags(struct net_device *dev, int change)
703{
704 struct macvlan_dev *vlan = netdev_priv(dev);
705 struct net_device *lowerdev = vlan->lowerdev;
706
Peter Christensenbbeb0ea2014-05-08 11:15:37 +0200707 if (dev->flags & IFF_UP) {
708 if (change & IFF_ALLMULTI)
709 dev_set_allmulti(lowerdev, dev->flags & IFF_ALLMULTI ? 1 : -1);
Vlad Yasevichefdbd2b2015-05-01 17:36:37 -0400710 if (change & IFF_PROMISC)
711 dev_set_promiscuity(lowerdev,
712 dev->flags & IFF_PROMISC ? 1 : -1);
713
Peter Christensenbbeb0ea2014-05-08 11:15:37 +0200714 }
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700715}
716
John Fastabenddf8ef8f2012-04-15 06:44:37 +0000717static void macvlan_set_mac_lists(struct net_device *dev)
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700718{
719 struct macvlan_dev *vlan = netdev_priv(dev);
720
Eric Dumazetcd431e72013-02-05 20:22:50 +0000721 if (dev->flags & (IFF_PROMISC | IFF_ALLMULTI)) {
722 bitmap_fill(vlan->mc_filter, MACVLAN_MC_FILTER_SZ);
723 } else {
724 struct netdev_hw_addr *ha;
725 DECLARE_BITMAP(filter, MACVLAN_MC_FILTER_SZ);
726
727 bitmap_zero(filter, MACVLAN_MC_FILTER_SZ);
728 netdev_for_each_mc_addr(ha, dev) {
Eric Dumazet3807ff52013-02-07 16:41:02 +0000729 __set_bit(mc_hash(vlan, ha->addr), filter);
Eric Dumazetcd431e72013-02-05 20:22:50 +0000730 }
Eric Dumazetd5270432013-02-07 16:02:57 +0000731
Eric Dumazet3807ff52013-02-07 16:41:02 +0000732 __set_bit(mc_hash(vlan, dev->broadcast), filter);
Eric Dumazetd5270432013-02-07 16:02:57 +0000733
Eric Dumazetcd431e72013-02-05 20:22:50 +0000734 bitmap_copy(vlan->mc_filter, filter, MACVLAN_MC_FILTER_SZ);
735 }
John Fastabenddf8ef8f2012-04-15 06:44:37 +0000736 dev_uc_sync(vlan->lowerdev, dev);
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700737 dev_mc_sync(vlan->lowerdev, dev);
738}
739
740static int macvlan_change_mtu(struct net_device *dev, int new_mtu)
741{
742 struct macvlan_dev *vlan = netdev_priv(dev);
743
744 if (new_mtu < 68 || vlan->lowerdev->mtu < new_mtu)
745 return -EINVAL;
746 dev->mtu = new_mtu;
747 return 0;
748}
749
750/*
751 * macvlan network devices have devices nesting below it and are a special
752 * "super class" of normal network devices; split their locks off into a
753 * separate class since they always nest.
754 */
755static struct lock_class_key macvlan_netdev_xmit_lock_key;
David S. Millercf508b12008-07-22 14:16:42 -0700756static struct lock_class_key macvlan_netdev_addr_lock_key;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700757
Vlad Yasevich8b4703e2014-03-03 15:33:53 -0500758#define ALWAYS_ON_FEATURES \
Jason Wanga523a5e2014-11-26 17:21:14 +0800759 (NETIF_F_SG | NETIF_F_GEN_CSUM | NETIF_F_GSO_SOFTWARE | NETIF_F_LLTX | \
760 NETIF_F_GSO_ROBUST)
Vlad Yasevich8b4703e2014-03-03 15:33:53 -0500761
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700762#define MACVLAN_FEATURES \
763 (NETIF_F_SG | NETIF_F_ALL_CSUM | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST | \
Michal Kubeček62dbe832014-12-05 17:05:49 +0100764 NETIF_F_GSO | NETIF_F_TSO | NETIF_F_UFO | NETIF_F_LRO | \
John Fastabend8d13e672011-06-06 04:27:16 +0000765 NETIF_F_TSO_ECN | NETIF_F_TSO6 | NETIF_F_GRO | NETIF_F_RXCSUM | \
Patrick McHardy28d2b132013-04-19 02:04:32 +0000766 NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_HW_VLAN_STAG_FILTER)
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700767
768#define MACVLAN_STATE_MASK \
769 ((1<<__LINK_STATE_NOCARRIER) | (1<<__LINK_STATE_DORMANT))
770
Vlad Yasevichc674ac32014-05-16 17:04:56 -0400771static int macvlan_get_nest_level(struct net_device *dev)
772{
773 return ((struct macvlan_dev *)netdev_priv(dev))->nest_level;
774}
775
David S. Millere8a04642008-07-17 00:34:19 -0700776static void macvlan_set_lockdep_class_one(struct net_device *dev,
777 struct netdev_queue *txq,
778 void *_unused)
David S. Millerc773e842008-07-08 23:13:53 -0700779{
780 lockdep_set_class(&txq->_xmit_lock,
781 &macvlan_netdev_xmit_lock_key);
782}
783
784static void macvlan_set_lockdep_class(struct net_device *dev)
785{
Vlad Yasevichc674ac32014-05-16 17:04:56 -0400786 lockdep_set_class_and_subclass(&dev->addr_list_lock,
787 &macvlan_netdev_addr_lock_key,
788 macvlan_get_nest_level(dev));
David S. Millere8a04642008-07-17 00:34:19 -0700789 netdev_for_each_tx_queue(dev, macvlan_set_lockdep_class_one, NULL);
David S. Millerc773e842008-07-08 23:13:53 -0700790}
791
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700792static int macvlan_init(struct net_device *dev)
793{
794 struct macvlan_dev *vlan = netdev_priv(dev);
795 const struct net_device *lowerdev = vlan->lowerdev;
796
797 dev->state = (dev->state & ~MACVLAN_STATE_MASK) |
798 (lowerdev->state & MACVLAN_STATE_MASK);
799 dev->features = lowerdev->features & MACVLAN_FEATURES;
Vlad Yasevich8b4703e2014-03-03 15:33:53 -0500800 dev->features |= ALWAYS_ON_FEATURES;
Michal Kubeček62dbe832014-12-05 17:05:49 +0100801 dev->hw_features |= NETIF_F_LRO;
Vlad Yasevich081e83a2014-07-31 10:30:25 -0400802 dev->vlan_features = lowerdev->vlan_features & MACVLAN_FEATURES;
Patrick McHardy8c2acc52009-11-23 14:18:53 -0800803 dev->gso_max_size = lowerdev->gso_max_size;
sg.tweak@gmail.comef5c8992009-06-10 09:55:02 +0000804 dev->hard_header_len = lowerdev->hard_header_len;
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700805
David S. Millerc773e842008-07-08 23:13:53 -0700806 macvlan_set_lockdep_class(dev);
807
WANG Cong1c213bd2014-02-13 11:46:28 -0800808 vlan->pcpu_stats = netdev_alloc_pcpu_stats(struct vlan_pcpu_stats);
Eric Dumazet8ffab512010-11-10 21:14:04 +0000809 if (!vlan->pcpu_stats)
Eric Dumazetfccaf712009-11-17 08:53:49 +0000810 return -ENOMEM;
811
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700812 return 0;
813}
814
Eric Dumazetfccaf712009-11-17 08:53:49 +0000815static void macvlan_uninit(struct net_device *dev)
816{
817 struct macvlan_dev *vlan = netdev_priv(dev);
Eric W. Biedermand5cd92442011-03-21 18:22:22 -0700818 struct macvlan_port *port = vlan->port;
Eric Dumazetfccaf712009-11-17 08:53:49 +0000819
Eric Dumazet8ffab512010-11-10 21:14:04 +0000820 free_percpu(vlan->pcpu_stats);
Eric W. Biedermand5cd92442011-03-21 18:22:22 -0700821
Michael Braun79cf79a2014-09-25 16:31:08 +0200822 macvlan_flush_sources(port, vlan);
David S. Miller5e3c5162014-08-14 14:32:49 -0700823 port->count -= 1;
824 if (!port->count)
Eric W. Biedermand5cd92442011-03-21 18:22:22 -0700825 macvlan_port_destroy(port->dev);
Eric Dumazetfccaf712009-11-17 08:53:49 +0000826}
827
Eric Dumazet28172732010-07-07 14:58:56 -0700828static struct rtnl_link_stats64 *macvlan_dev_get_stats64(struct net_device *dev,
829 struct rtnl_link_stats64 *stats)
Eric Dumazetfccaf712009-11-17 08:53:49 +0000830{
Eric Dumazetfccaf712009-11-17 08:53:49 +0000831 struct macvlan_dev *vlan = netdev_priv(dev);
832
Eric Dumazet8ffab512010-11-10 21:14:04 +0000833 if (vlan->pcpu_stats) {
Li RongQingcdf3e272014-01-04 14:22:34 +0800834 struct vlan_pcpu_stats *p;
Eric Dumazet8ffab512010-11-10 21:14:04 +0000835 u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes;
836 u32 rx_errors = 0, tx_dropped = 0;
Eric Dumazetbc661542010-06-24 00:54:21 +0000837 unsigned int start;
Eric Dumazetfccaf712009-11-17 08:53:49 +0000838 int i;
839
840 for_each_possible_cpu(i) {
Eric Dumazet8ffab512010-11-10 21:14:04 +0000841 p = per_cpu_ptr(vlan->pcpu_stats, i);
Eric Dumazetbc661542010-06-24 00:54:21 +0000842 do {
Eric W. Biederman57a77442014-03-13 21:26:42 -0700843 start = u64_stats_fetch_begin_irq(&p->syncp);
Eric Dumazetbc661542010-06-24 00:54:21 +0000844 rx_packets = p->rx_packets;
845 rx_bytes = p->rx_bytes;
846 rx_multicast = p->rx_multicast;
Eric Dumazet8ffab512010-11-10 21:14:04 +0000847 tx_packets = p->tx_packets;
848 tx_bytes = p->tx_bytes;
Eric W. Biederman57a77442014-03-13 21:26:42 -0700849 } while (u64_stats_fetch_retry_irq(&p->syncp, start));
Eric Dumazet8ffab512010-11-10 21:14:04 +0000850
851 stats->rx_packets += rx_packets;
852 stats->rx_bytes += rx_bytes;
853 stats->multicast += rx_multicast;
854 stats->tx_packets += tx_packets;
855 stats->tx_bytes += tx_bytes;
856 /* rx_errors & tx_dropped are u32, updated
857 * without syncp protection.
858 */
859 rx_errors += p->rx_errors;
860 tx_dropped += p->tx_dropped;
Eric Dumazetfccaf712009-11-17 08:53:49 +0000861 }
Eric Dumazet8ffab512010-11-10 21:14:04 +0000862 stats->rx_errors = rx_errors;
863 stats->rx_dropped = rx_errors;
864 stats->tx_dropped = tx_dropped;
Eric Dumazetfccaf712009-11-17 08:53:49 +0000865 }
866 return stats;
867}
868
Jiri Pirko8e586132011-12-08 19:52:37 -0500869static int macvlan_vlan_rx_add_vid(struct net_device *dev,
Patrick McHardy80d5c362013-04-19 02:04:28 +0000870 __be16 proto, u16 vid)
John Fastabend8d13e672011-06-06 04:27:16 +0000871{
872 struct macvlan_dev *vlan = netdev_priv(dev);
873 struct net_device *lowerdev = vlan->lowerdev;
John Fastabend8d13e672011-06-06 04:27:16 +0000874
Patrick McHardy80d5c362013-04-19 02:04:28 +0000875 return vlan_vid_add(lowerdev, proto, vid);
John Fastabend8d13e672011-06-06 04:27:16 +0000876}
877
Jiri Pirko8e586132011-12-08 19:52:37 -0500878static int macvlan_vlan_rx_kill_vid(struct net_device *dev,
Patrick McHardy80d5c362013-04-19 02:04:28 +0000879 __be16 proto, u16 vid)
John Fastabend8d13e672011-06-06 04:27:16 +0000880{
881 struct macvlan_dev *vlan = netdev_priv(dev);
882 struct net_device *lowerdev = vlan->lowerdev;
John Fastabend8d13e672011-06-06 04:27:16 +0000883
Patrick McHardy80d5c362013-04-19 02:04:28 +0000884 vlan_vid_del(lowerdev, proto, vid);
Jiri Pirko8e586132011-12-08 19:52:37 -0500885 return 0;
John Fastabend8d13e672011-06-06 04:27:16 +0000886}
887
stephen hemmingeredc7d572012-10-01 12:32:33 +0000888static int macvlan_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
John Fastabenddf8ef8f2012-04-15 06:44:37 +0000889 struct net_device *dev,
Jiri Pirkof6f64242014-11-28 14:34:15 +0100890 const unsigned char *addr, u16 vid,
John Fastabenddf8ef8f2012-04-15 06:44:37 +0000891 u16 flags)
892{
893 struct macvlan_dev *vlan = netdev_priv(dev);
894 int err = -EINVAL;
895
Vlad Yasevich8a50f112014-08-15 13:04:59 -0400896 /* Support unicast filter only on passthru devices.
897 * Multicast filter should be allowed on all devices.
898 */
899 if (!vlan->port->passthru && is_unicast_ether_addr(addr))
John Fastabenddf8ef8f2012-04-15 06:44:37 +0000900 return -EOPNOTSUPP;
901
Thomas Richterab2cfbb2013-07-19 17:20:08 +0200902 if (flags & NLM_F_REPLACE)
903 return -EOPNOTSUPP;
904
John Fastabenddf8ef8f2012-04-15 06:44:37 +0000905 if (is_unicast_ether_addr(addr))
906 err = dev_uc_add_excl(dev, addr);
907 else if (is_multicast_ether_addr(addr))
908 err = dev_mc_add_excl(dev, addr);
909
910 return err;
911}
912
Vlad Yasevich1690be62013-02-13 12:00:18 +0000913static int macvlan_fdb_del(struct ndmsg *ndm, struct nlattr *tb[],
John Fastabenddf8ef8f2012-04-15 06:44:37 +0000914 struct net_device *dev,
Jiri Pirkof6f64242014-11-28 14:34:15 +0100915 const unsigned char *addr, u16 vid)
John Fastabenddf8ef8f2012-04-15 06:44:37 +0000916{
917 struct macvlan_dev *vlan = netdev_priv(dev);
918 int err = -EINVAL;
919
Vlad Yasevich8a50f112014-08-15 13:04:59 -0400920 /* Support unicast filter only on passthru devices.
921 * Multicast filter should be allowed on all devices.
922 */
923 if (!vlan->port->passthru && is_unicast_ether_addr(addr))
John Fastabenddf8ef8f2012-04-15 06:44:37 +0000924 return -EOPNOTSUPP;
925
926 if (is_unicast_ether_addr(addr))
927 err = dev_uc_del(dev, addr);
928 else if (is_multicast_ether_addr(addr))
929 err = dev_mc_del(dev, addr);
930
931 return err;
932}
933
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700934static void macvlan_ethtool_get_drvinfo(struct net_device *dev,
935 struct ethtool_drvinfo *drvinfo)
936{
Jiri Pirko7826d432013-01-06 00:44:26 +0000937 strlcpy(drvinfo->driver, "macvlan", sizeof(drvinfo->driver));
938 strlcpy(drvinfo->version, "0.1", sizeof(drvinfo->version));
Patrick McHardyb863ceb2007-07-14 18:55:06 -0700939}
940
Stephen Hemminger9edb8bb2008-10-29 15:31:53 -0700941static int macvlan_ethtool_get_settings(struct net_device *dev,
942 struct ethtool_cmd *cmd)
943{
944 const struct macvlan_dev *vlan = netdev_priv(dev);
Jiri Pirko4bc71cb2011-09-03 03:34:30 +0000945
946 return __ethtool_get_settings(vlan->lowerdev, cmd);
Stephen Hemminger9edb8bb2008-10-29 15:31:53 -0700947}
948
Vlad Yasevich2be5c762013-06-25 16:04:21 -0400949static netdev_features_t macvlan_fix_features(struct net_device *dev,
950 netdev_features_t features)
951{
952 struct macvlan_dev *vlan = netdev_priv(dev);
Michal Kubeček62dbe832014-12-05 17:05:49 +0100953 netdev_features_t lowerdev_features = vlan->lowerdev->features;
Florian Westphal797f87f2013-12-26 12:17:00 +0100954 netdev_features_t mask;
Vlad Yasevich2be5c762013-06-25 16:04:21 -0400955
Florian Westphal797f87f2013-12-26 12:17:00 +0100956 features |= NETIF_F_ALL_FOR_ALL;
957 features &= (vlan->set_features | ~MACVLAN_FEATURES);
958 mask = features;
959
Michal Kubeček62dbe832014-12-05 17:05:49 +0100960 lowerdev_features &= (features | ~NETIF_F_LRO);
961 features = netdev_increment_features(lowerdev_features, features, mask);
Vlad Yasevich8b4703e2014-03-03 15:33:53 -0500962 features |= ALWAYS_ON_FEATURES;
Francesco Ruggeri0d0162e2014-09-17 10:40:44 -0700963 features &= ~NETIF_F_NETNS_LOCAL;
Florian Westphal797f87f2013-12-26 12:17:00 +0100964
965 return features;
Vlad Yasevich2be5c762013-06-25 16:04:21 -0400966}
967
dingtianhong688cea82014-05-30 16:00:56 +0800968#ifdef CONFIG_NET_POLL_CONTROLLER
969static void macvlan_dev_poll_controller(struct net_device *dev)
970{
971 return;
972}
973
974static int macvlan_dev_netpoll_setup(struct net_device *dev, struct netpoll_info *npinfo)
975{
976 struct macvlan_dev *vlan = netdev_priv(dev);
977 struct net_device *real_dev = vlan->lowerdev;
978 struct netpoll *netpoll;
979 int err = 0;
980
981 netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL);
982 err = -ENOMEM;
983 if (!netpoll)
984 goto out;
985
986 err = __netpoll_setup(netpoll, real_dev);
987 if (err) {
988 kfree(netpoll);
989 goto out;
990 }
991
992 vlan->netpoll = netpoll;
993
994out:
995 return err;
996}
997
998static void macvlan_dev_netpoll_cleanup(struct net_device *dev)
999{
1000 struct macvlan_dev *vlan = netdev_priv(dev);
1001 struct netpoll *netpoll = vlan->netpoll;
1002
1003 if (!netpoll)
1004 return;
1005
1006 vlan->netpoll = NULL;
1007
1008 __netpoll_free_async(netpoll);
1009}
1010#endif /* CONFIG_NET_POLL_CONTROLLER */
1011
Nicolas Dichtelef5fa6b2015-04-02 17:07:05 +02001012static int macvlan_dev_get_iflink(const struct net_device *dev)
1013{
1014 struct macvlan_dev *vlan = netdev_priv(dev);
1015
1016 return vlan->lowerdev->ifindex;
1017}
1018
Patrick McHardyb863ceb2007-07-14 18:55:06 -07001019static const struct ethtool_ops macvlan_ethtool_ops = {
1020 .get_link = ethtool_op_get_link,
Stephen Hemminger9edb8bb2008-10-29 15:31:53 -07001021 .get_settings = macvlan_ethtool_get_settings,
Patrick McHardyb863ceb2007-07-14 18:55:06 -07001022 .get_drvinfo = macvlan_ethtool_get_drvinfo,
1023};
1024
Stephen Hemminger54a30c92008-11-19 21:51:06 -08001025static const struct net_device_ops macvlan_netdev_ops = {
1026 .ndo_init = macvlan_init,
Eric Dumazetfccaf712009-11-17 08:53:49 +00001027 .ndo_uninit = macvlan_uninit,
Stephen Hemminger54a30c92008-11-19 21:51:06 -08001028 .ndo_open = macvlan_open,
1029 .ndo_stop = macvlan_stop,
Stephen Hemminger00829822008-11-20 20:14:53 -08001030 .ndo_start_xmit = macvlan_start_xmit,
Stephen Hemminger54a30c92008-11-19 21:51:06 -08001031 .ndo_change_mtu = macvlan_change_mtu,
Vlad Yasevich2be5c762013-06-25 16:04:21 -04001032 .ndo_fix_features = macvlan_fix_features,
Stephen Hemminger54a30c92008-11-19 21:51:06 -08001033 .ndo_change_rx_flags = macvlan_change_rx_flags,
1034 .ndo_set_mac_address = macvlan_set_mac_address,
John Fastabenddf8ef8f2012-04-15 06:44:37 +00001035 .ndo_set_rx_mode = macvlan_set_mac_lists,
Eric Dumazetbc661542010-06-24 00:54:21 +00001036 .ndo_get_stats64 = macvlan_dev_get_stats64,
Stephen Hemminger54a30c92008-11-19 21:51:06 -08001037 .ndo_validate_addr = eth_validate_addr,
John Fastabend8d13e672011-06-06 04:27:16 +00001038 .ndo_vlan_rx_add_vid = macvlan_vlan_rx_add_vid,
1039 .ndo_vlan_rx_kill_vid = macvlan_vlan_rx_kill_vid,
John Fastabenddf8ef8f2012-04-15 06:44:37 +00001040 .ndo_fdb_add = macvlan_fdb_add,
1041 .ndo_fdb_del = macvlan_fdb_del,
1042 .ndo_fdb_dump = ndo_dflt_fdb_dump,
Vlad Yasevichc674ac32014-05-16 17:04:56 -04001043 .ndo_get_lock_subclass = macvlan_get_nest_level,
dingtianhong688cea82014-05-30 16:00:56 +08001044#ifdef CONFIG_NET_POLL_CONTROLLER
1045 .ndo_poll_controller = macvlan_dev_poll_controller,
1046 .ndo_netpoll_setup = macvlan_dev_netpoll_setup,
1047 .ndo_netpoll_cleanup = macvlan_dev_netpoll_cleanup,
1048#endif
Nicolas Dichtelef5fa6b2015-04-02 17:07:05 +02001049 .ndo_get_iflink = macvlan_dev_get_iflink,
Toshiaki Makitaf56e67b2015-07-31 15:03:24 +09001050 .ndo_features_check = passthru_features_check,
Stephen Hemminger54a30c92008-11-19 21:51:06 -08001051};
1052
Herbert Xu8a357472010-07-21 21:44:31 +00001053void macvlan_common_setup(struct net_device *dev)
Patrick McHardyb863ceb2007-07-14 18:55:06 -07001054{
1055 ether_setup(dev);
1056
Eric Dumazet02875872014-10-05 18:38:35 -07001057 dev->priv_flags &= ~IFF_TX_SKB_SHARING;
1058 netif_keep_dst(dev);
Vlad Yasevich87ab7f62013-03-07 10:21:48 +00001059 dev->priv_flags |= IFF_UNICAST_FLT;
Stephen Hemminger54a30c92008-11-19 21:51:06 -08001060 dev->netdev_ops = &macvlan_netdev_ops;
Patrick McHardyb863ceb2007-07-14 18:55:06 -07001061 dev->destructor = free_netdev;
Lutz Jaenicke71740122013-08-28 13:34:31 +02001062 dev->header_ops = &macvlan_hard_header_ops;
Patrick McHardyb863ceb2007-07-14 18:55:06 -07001063 dev->ethtool_ops = &macvlan_ethtool_ops;
Herbert Xu8a357472010-07-21 21:44:31 +00001064}
1065EXPORT_SYMBOL_GPL(macvlan_common_setup);
1066
1067static void macvlan_setup(struct net_device *dev)
1068{
1069 macvlan_common_setup(dev);
Patrick McHardyb863ceb2007-07-14 18:55:06 -07001070 dev->tx_queue_len = 0;
1071}
1072
1073static int macvlan_port_create(struct net_device *dev)
1074{
1075 struct macvlan_port *port;
1076 unsigned int i;
Jiri Pirkoab95bfe2010-06-01 21:52:08 +00001077 int err;
Patrick McHardyb863ceb2007-07-14 18:55:06 -07001078
1079 if (dev->type != ARPHRD_ETHER || dev->flags & IFF_LOOPBACK)
1080 return -EINVAL;
1081
Mahesh Bandeward6b00fe2014-12-06 15:53:46 -08001082 if (netif_is_ipvlan_port(dev))
1083 return -EBUSY;
1084
Patrick McHardyb863ceb2007-07-14 18:55:06 -07001085 port = kzalloc(sizeof(*port), GFP_KERNEL);
1086 if (port == NULL)
1087 return -ENOMEM;
1088
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +00001089 port->passthru = false;
Patrick McHardyb863ceb2007-07-14 18:55:06 -07001090 port->dev = dev;
1091 INIT_LIST_HEAD(&port->vlans);
1092 for (i = 0; i < MACVLAN_HASH_SIZE; i++)
1093 INIT_HLIST_HEAD(&port->vlan_hash[i]);
Michael Braun79cf79a2014-09-25 16:31:08 +02001094 for (i = 0; i < MACVLAN_HASH_SIZE; i++)
1095 INIT_HLIST_HEAD(&port->vlan_source_hash[i]);
Jiri Pirkoab95bfe2010-06-01 21:52:08 +00001096
Herbert Xu412ca152014-04-17 13:45:59 +08001097 skb_queue_head_init(&port->bc_queue);
1098 INIT_WORK(&port->bc_work, macvlan_process_broadcast);
1099
Jiri Pirkoa35e2c12010-06-15 03:27:57 +00001100 err = netdev_rx_handler_register(dev, macvlan_handle_frame, port);
1101 if (err)
Jiri Pirkoab95bfe2010-06-01 21:52:08 +00001102 kfree(port);
Eric Dumazetd9351562011-05-20 14:59:23 -04001103 else
1104 dev->priv_flags |= IFF_MACVLAN_PORT;
Jiri Pirkoab95bfe2010-06-01 21:52:08 +00001105 return err;
Patrick McHardyb863ceb2007-07-14 18:55:06 -07001106}
1107
1108static void macvlan_port_destroy(struct net_device *dev)
1109{
Eric Dumazete052f7e2013-03-30 10:08:44 +00001110 struct macvlan_port *port = macvlan_port_get_rtnl(dev);
Patrick McHardyb863ceb2007-07-14 18:55:06 -07001111
Jiri Pirkoa35e2c12010-06-15 03:27:57 +00001112 dev->priv_flags &= ~IFF_MACVLAN_PORT;
Jiri Pirkoab95bfe2010-06-01 21:52:08 +00001113 netdev_rx_handler_unregister(dev);
Eric Dumazetfe0ca732014-10-22 19:43:46 -07001114
1115 /* After this point, no packet can schedule bc_work anymore,
1116 * but we need to cancel it and purge left skbs if any.
1117 */
1118 cancel_work_sync(&port->bc_work);
1119 __skb_queue_purge(&port->bc_queue);
1120
Lai Jiangshan6e070ae2011-03-18 12:00:07 +08001121 kfree_rcu(port, rcu);
Patrick McHardyb863ceb2007-07-14 18:55:06 -07001122}
1123
Patrick McHardyb863ceb2007-07-14 18:55:06 -07001124static int macvlan_validate(struct nlattr *tb[], struct nlattr *data[])
1125{
1126 if (tb[IFLA_ADDRESS]) {
1127 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
1128 return -EINVAL;
1129 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
1130 return -EADDRNOTAVAIL;
1131 }
Arnd Bergmann27c0b1a2009-11-26 06:07:11 +00001132
Michael S. Tsirkin15127472013-08-05 18:25:54 +03001133 if (data && data[IFLA_MACVLAN_FLAGS] &&
1134 nla_get_u16(data[IFLA_MACVLAN_FLAGS]) & ~MACVLAN_FLAG_NOPROMISC)
1135 return -EINVAL;
1136
Arnd Bergmann27c0b1a2009-11-26 06:07:11 +00001137 if (data && data[IFLA_MACVLAN_MODE]) {
1138 switch (nla_get_u32(data[IFLA_MACVLAN_MODE])) {
1139 case MACVLAN_MODE_PRIVATE:
1140 case MACVLAN_MODE_VEPA:
1141 case MACVLAN_MODE_BRIDGE:
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +00001142 case MACVLAN_MODE_PASSTHRU:
Michael Braun79cf79a2014-09-25 16:31:08 +02001143 case MACVLAN_MODE_SOURCE:
Arnd Bergmann27c0b1a2009-11-26 06:07:11 +00001144 break;
1145 default:
1146 return -EINVAL;
1147 }
1148 }
Michael Braun79cf79a2014-09-25 16:31:08 +02001149
1150 if (data && data[IFLA_MACVLAN_MACADDR_MODE]) {
1151 switch (nla_get_u32(data[IFLA_MACVLAN_MACADDR_MODE])) {
1152 case MACVLAN_MACADDR_ADD:
1153 case MACVLAN_MACADDR_DEL:
1154 case MACVLAN_MACADDR_FLUSH:
1155 case MACVLAN_MACADDR_SET:
1156 break;
1157 default:
1158 return -EINVAL;
1159 }
1160 }
1161
1162 if (data && data[IFLA_MACVLAN_MACADDR]) {
1163 if (nla_len(data[IFLA_MACVLAN_MACADDR]) != ETH_ALEN)
1164 return -EINVAL;
1165
1166 if (!is_valid_ether_addr(nla_data(data[IFLA_MACVLAN_MACADDR])))
1167 return -EADDRNOTAVAIL;
1168 }
1169
1170 if (data && data[IFLA_MACVLAN_MACADDR_COUNT])
1171 return -EINVAL;
1172
1173 return 0;
1174}
1175
1176/**
1177 * reconfigure list of remote source mac address
1178 * (only for macvlan devices in source mode)
1179 * Note regarding alignment: all netlink data is aligned to 4 Byte, which
1180 * suffices for both ether_addr_copy and ether_addr_equal_64bits usage.
1181 */
1182static int macvlan_changelink_sources(struct macvlan_dev *vlan, u32 mode,
1183 struct nlattr *data[])
1184{
1185 char *addr = NULL;
1186 int ret, rem, len;
1187 struct nlattr *nla, *head;
1188 struct macvlan_source_entry *entry;
1189
1190 if (data[IFLA_MACVLAN_MACADDR])
1191 addr = nla_data(data[IFLA_MACVLAN_MACADDR]);
1192
1193 if (mode == MACVLAN_MACADDR_ADD) {
1194 if (!addr)
1195 return -EINVAL;
1196
1197 return macvlan_hash_add_source(vlan, addr);
1198
1199 } else if (mode == MACVLAN_MACADDR_DEL) {
1200 if (!addr)
1201 return -EINVAL;
1202
1203 entry = macvlan_hash_lookup_source(vlan, addr);
1204 if (entry) {
1205 macvlan_hash_del_source(entry);
1206 vlan->macaddr_count--;
1207 }
1208 } else if (mode == MACVLAN_MACADDR_FLUSH) {
1209 macvlan_flush_sources(vlan->port, vlan);
1210 } else if (mode == MACVLAN_MACADDR_SET) {
1211 macvlan_flush_sources(vlan->port, vlan);
1212
1213 if (addr) {
1214 ret = macvlan_hash_add_source(vlan, addr);
1215 if (ret)
1216 return ret;
1217 }
1218
1219 if (!data || !data[IFLA_MACVLAN_MACADDR_DATA])
1220 return 0;
1221
1222 head = nla_data(data[IFLA_MACVLAN_MACADDR_DATA]);
1223 len = nla_len(data[IFLA_MACVLAN_MACADDR_DATA]);
1224
1225 nla_for_each_attr(nla, head, len, rem) {
1226 if (nla_type(nla) != IFLA_MACVLAN_MACADDR ||
1227 nla_len(nla) != ETH_ALEN)
1228 continue;
1229
1230 addr = nla_data(nla);
1231 ret = macvlan_hash_add_source(vlan, addr);
1232 if (ret)
1233 return ret;
1234 }
1235 } else {
1236 return -EINVAL;
1237 }
1238
Patrick McHardyb863ceb2007-07-14 18:55:06 -07001239 return 0;
1240}
1241
Arnd Bergmannfc0663d2010-01-30 12:23:40 +00001242int macvlan_common_newlink(struct net *src_net, struct net_device *dev,
Vlad Yasevich2f6a1b62013-12-11 13:27:11 -05001243 struct nlattr *tb[], struct nlattr *data[])
Patrick McHardyb863ceb2007-07-14 18:55:06 -07001244{
1245 struct macvlan_dev *vlan = netdev_priv(dev);
1246 struct macvlan_port *port;
1247 struct net_device *lowerdev;
1248 int err;
Michael Braun79cf79a2014-09-25 16:31:08 +02001249 int macmode;
Patrick McHardyb863ceb2007-07-14 18:55:06 -07001250
1251 if (!tb[IFLA_LINK])
1252 return -EINVAL;
1253
Eric W. Biederman81adee42009-11-08 00:53:51 -08001254 lowerdev = __dev_get_by_index(src_net, nla_get_u32(tb[IFLA_LINK]));
Patrick McHardyb863ceb2007-07-14 18:55:06 -07001255 if (lowerdev == NULL)
1256 return -ENODEV;
1257
Kevin Wallaced70f2cf2013-12-03 02:55:22 -08001258 /* When creating macvlans or macvtaps on top of other macvlans - use
Eric Biedermanb0832a22009-03-13 13:15:37 -07001259 * the real device as the lowerdev.
Patrick McHardya6ca5f12008-01-10 22:39:28 -08001260 */
Kevin Wallaced70f2cf2013-12-03 02:55:22 -08001261 if (netif_is_macvlan(lowerdev))
1262 lowerdev = macvlan_dev_real_dev(lowerdev);
Patrick McHardya6ca5f12008-01-10 22:39:28 -08001263
Patrick McHardyb863ceb2007-07-14 18:55:06 -07001264 if (!tb[IFLA_MTU])
1265 dev->mtu = lowerdev->mtu;
1266 else if (dev->mtu > lowerdev->mtu)
1267 return -EINVAL;
1268
1269 if (!tb[IFLA_ADDRESS])
Danny Kukawka7ce5d222012-02-15 06:45:40 +00001270 eth_hw_addr_random(dev);
Patrick McHardyb863ceb2007-07-14 18:55:06 -07001271
Jiri Pirkoa35e2c12010-06-15 03:27:57 +00001272 if (!macvlan_port_exists(lowerdev)) {
Patrick McHardyb863ceb2007-07-14 18:55:06 -07001273 err = macvlan_port_create(lowerdev);
1274 if (err < 0)
1275 return err;
1276 }
Eric Dumazete052f7e2013-03-30 10:08:44 +00001277 port = macvlan_port_get_rtnl(lowerdev);
Patrick McHardyb863ceb2007-07-14 18:55:06 -07001278
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +00001279 /* Only 1 macvlan device can be created in passthru mode */
1280 if (port->passthru)
1281 return -EINVAL;
1282
Patrick McHardyb863ceb2007-07-14 18:55:06 -07001283 vlan->lowerdev = lowerdev;
1284 vlan->dev = dev;
1285 vlan->port = port;
Vlad Yasevich2be5c762013-06-25 16:04:21 -04001286 vlan->set_features = MACVLAN_FEATURES;
Vlad Yasevichc674ac32014-05-16 17:04:56 -04001287 vlan->nest_level = dev_get_nest_level(lowerdev, netif_is_macvlan) + 1;
Patrick McHardyb863ceb2007-07-14 18:55:06 -07001288
Arnd Bergmann27c0b1a2009-11-26 06:07:11 +00001289 vlan->mode = MACVLAN_MODE_VEPA;
1290 if (data && data[IFLA_MACVLAN_MODE])
1291 vlan->mode = nla_get_u32(data[IFLA_MACVLAN_MODE]);
1292
John Fastabenddf8ef8f2012-04-15 06:44:37 +00001293 if (data && data[IFLA_MACVLAN_FLAGS])
1294 vlan->flags = nla_get_u16(data[IFLA_MACVLAN_FLAGS]);
1295
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +00001296 if (vlan->mode == MACVLAN_MODE_PASSTHRU) {
David S. Miller5e3c5162014-08-14 14:32:49 -07001297 if (port->count)
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +00001298 return -EINVAL;
1299 port->passthru = true;
Bjørn Mork8b986042013-08-30 18:08:47 +02001300 eth_hw_addr_inherit(dev, lowerdev);
Sridhar Samudralaeb06acd2010-10-28 13:10:50 +00001301 }
1302
Michael Braun79cf79a2014-09-25 16:31:08 +02001303 if (data && data[IFLA_MACVLAN_MACADDR_MODE]) {
1304 if (vlan->mode != MACVLAN_MODE_SOURCE)
1305 return -EINVAL;
1306 macmode = nla_get_u32(data[IFLA_MACVLAN_MACADDR_MODE]);
1307 err = macvlan_changelink_sources(vlan, macmode, data);
1308 if (err)
1309 return err;
1310 }
1311
David S. Miller5e3c5162014-08-14 14:32:49 -07001312 port->count += 1;
John Fastabend47d4ab92013-10-21 14:28:02 -07001313 err = register_netdevice(dev);
1314 if (err < 0)
1315 goto destroy_port;
1316
John Fastabenda6cc0cf2013-11-06 09:54:46 -08001317 dev->priv_flags |= IFF_MACVLAN;
Jiri Pirko7cd43db2013-01-03 22:48:50 +00001318 err = netdev_upper_dev_link(lowerdev, dev);
1319 if (err)
Cong Wangda377052014-02-11 15:51:29 -08001320 goto unregister_netdev;
Patrick McHardyb863ceb2007-07-14 18:55:06 -07001321
Jiri Pirko233c7df2013-05-09 04:23:40 +00001322 list_add_tail_rcu(&vlan->list, &port->vlans);
Patrick Mullaneyfc4a7482009-12-03 15:59:22 -08001323 netif_stacked_transfer_operstate(lowerdev, dev);
Jiri Pirkof16d3d52010-05-24 07:02:25 +00001324
Patrick McHardyb863ceb2007-07-14 18:55:06 -07001325 return 0;
Jiri Pirkof16d3d52010-05-24 07:02:25 +00001326
Cong Wangda377052014-02-11 15:51:29 -08001327unregister_netdev:
1328 unregister_netdevice(dev);
Jiri Pirkof16d3d52010-05-24 07:02:25 +00001329destroy_port:
David S. Miller5e3c5162014-08-14 14:32:49 -07001330 port->count -= 1;
1331 if (!port->count)
Jiri Pirkof16d3d52010-05-24 07:02:25 +00001332 macvlan_port_destroy(lowerdev);
1333
1334 return err;
Patrick McHardyb863ceb2007-07-14 18:55:06 -07001335}
Arnd Bergmannfc0663d2010-01-30 12:23:40 +00001336EXPORT_SYMBOL_GPL(macvlan_common_newlink);
Patrick McHardyb863ceb2007-07-14 18:55:06 -07001337
Arnd Bergmannfc0663d2010-01-30 12:23:40 +00001338static int macvlan_newlink(struct net *src_net, struct net_device *dev,
1339 struct nlattr *tb[], struct nlattr *data[])
1340{
Vlad Yasevich2f6a1b62013-12-11 13:27:11 -05001341 return macvlan_common_newlink(src_net, dev, tb, data);
Arnd Bergmannfc0663d2010-01-30 12:23:40 +00001342}
1343
1344void macvlan_dellink(struct net_device *dev, struct list_head *head)
Patrick McHardyb863ceb2007-07-14 18:55:06 -07001345{
1346 struct macvlan_dev *vlan = netdev_priv(dev);
Patrick McHardyb863ceb2007-07-14 18:55:06 -07001347
Michael Braun79cf79a2014-09-25 16:31:08 +02001348 if (vlan->mode == MACVLAN_MODE_SOURCE)
1349 macvlan_flush_sources(vlan->port, vlan);
Jiri Pirko233c7df2013-05-09 04:23:40 +00001350 list_del_rcu(&vlan->list);
Eric Dumazet23289a32009-10-27 07:06:36 +00001351 unregister_netdevice_queue(dev, head);
Jiri Pirko7cd43db2013-01-03 22:48:50 +00001352 netdev_upper_dev_unlink(vlan->lowerdev, dev);
Patrick McHardyb863ceb2007-07-14 18:55:06 -07001353}
Arnd Bergmannfc0663d2010-01-30 12:23:40 +00001354EXPORT_SYMBOL_GPL(macvlan_dellink);
Patrick McHardyb863ceb2007-07-14 18:55:06 -07001355
Arnd Bergmann27c0b1a2009-11-26 06:07:11 +00001356static int macvlan_changelink(struct net_device *dev,
1357 struct nlattr *tb[], struct nlattr *data[])
1358{
1359 struct macvlan_dev *vlan = netdev_priv(dev);
Michael S. Tsirkin266e8342013-08-01 13:43:19 +03001360 enum macvlan_mode mode;
1361 bool set_mode = false;
Michael Braun79cf79a2014-09-25 16:31:08 +02001362 enum macvlan_macaddr_mode macmode;
1363 int ret;
Michael S. Tsirkin266e8342013-08-01 13:43:19 +03001364
1365 /* Validate mode, but don't set yet: setting flags may fail. */
1366 if (data && data[IFLA_MACVLAN_MODE]) {
1367 set_mode = true;
1368 mode = nla_get_u32(data[IFLA_MACVLAN_MODE]);
1369 /* Passthrough mode can't be set or cleared dynamically */
1370 if ((mode == MACVLAN_MODE_PASSTHRU) !=
1371 (vlan->mode == MACVLAN_MODE_PASSTHRU))
1372 return -EINVAL;
Michael Braun79cf79a2014-09-25 16:31:08 +02001373 if (vlan->mode == MACVLAN_MODE_SOURCE &&
1374 vlan->mode != mode)
1375 macvlan_flush_sources(vlan->port, vlan);
Michael S. Tsirkin266e8342013-08-01 13:43:19 +03001376 }
Michael S. Tsirkin99ffc3e2013-06-13 10:07:29 +03001377
John Fastabenddf8ef8f2012-04-15 06:44:37 +00001378 if (data && data[IFLA_MACVLAN_FLAGS]) {
1379 __u16 flags = nla_get_u16(data[IFLA_MACVLAN_FLAGS]);
1380 bool promisc = (flags ^ vlan->flags) & MACVLAN_FLAG_NOPROMISC;
Michael S. Tsirkin99ffc3e2013-06-13 10:07:29 +03001381 if (vlan->port->passthru && promisc) {
1382 int err;
John Fastabenddf8ef8f2012-04-15 06:44:37 +00001383
Michael S. Tsirkin99ffc3e2013-06-13 10:07:29 +03001384 if (flags & MACVLAN_FLAG_NOPROMISC)
1385 err = dev_set_promiscuity(vlan->lowerdev, -1);
1386 else
1387 err = dev_set_promiscuity(vlan->lowerdev, 1);
1388 if (err < 0)
1389 return err;
1390 }
John Fastabenddf8ef8f2012-04-15 06:44:37 +00001391 vlan->flags = flags;
1392 }
Michael S. Tsirkin266e8342013-08-01 13:43:19 +03001393 if (set_mode)
1394 vlan->mode = mode;
Michael Braun79cf79a2014-09-25 16:31:08 +02001395 if (data && data[IFLA_MACVLAN_MACADDR_MODE]) {
1396 if (vlan->mode != MACVLAN_MODE_SOURCE)
1397 return -EINVAL;
1398 macmode = nla_get_u32(data[IFLA_MACVLAN_MACADDR_MODE]);
1399 ret = macvlan_changelink_sources(vlan, macmode, data);
1400 if (ret)
1401 return ret;
1402 }
Arnd Bergmann27c0b1a2009-11-26 06:07:11 +00001403 return 0;
1404}
1405
Michael Braun79cf79a2014-09-25 16:31:08 +02001406static size_t macvlan_get_size_mac(const struct macvlan_dev *vlan)
1407{
1408 if (vlan->macaddr_count == 0)
1409 return 0;
1410 return nla_total_size(0) /* IFLA_MACVLAN_MACADDR_DATA */
1411 + vlan->macaddr_count * nla_total_size(sizeof(u8) * ETH_ALEN);
1412}
1413
Arnd Bergmann27c0b1a2009-11-26 06:07:11 +00001414static size_t macvlan_get_size(const struct net_device *dev)
1415{
Michael Braun79cf79a2014-09-25 16:31:08 +02001416 struct macvlan_dev *vlan = netdev_priv(dev);
1417
Eric Dumazet01fe9442013-01-17 13:30:49 -08001418 return (0
1419 + nla_total_size(4) /* IFLA_MACVLAN_MODE */
1420 + nla_total_size(2) /* IFLA_MACVLAN_FLAGS */
Michael Braun79cf79a2014-09-25 16:31:08 +02001421 + nla_total_size(4) /* IFLA_MACVLAN_MACADDR_COUNT */
1422 + macvlan_get_size_mac(vlan) /* IFLA_MACVLAN_MACADDR */
Eric Dumazet01fe9442013-01-17 13:30:49 -08001423 );
Arnd Bergmann27c0b1a2009-11-26 06:07:11 +00001424}
1425
Michael Braun79cf79a2014-09-25 16:31:08 +02001426static int macvlan_fill_info_macaddr(struct sk_buff *skb,
1427 const struct macvlan_dev *vlan,
1428 const int i)
1429{
1430 struct hlist_head *h = &vlan->port->vlan_source_hash[i];
1431 struct macvlan_source_entry *entry;
1432
1433 hlist_for_each_entry_rcu(entry, h, hlist) {
1434 if (entry->vlan != vlan)
1435 continue;
1436 if (nla_put(skb, IFLA_MACVLAN_MACADDR, ETH_ALEN, entry->addr))
1437 return 1;
1438 }
1439 return 0;
1440}
1441
Arnd Bergmann27c0b1a2009-11-26 06:07:11 +00001442static int macvlan_fill_info(struct sk_buff *skb,
1443 const struct net_device *dev)
1444{
1445 struct macvlan_dev *vlan = netdev_priv(dev);
Michael Braun79cf79a2014-09-25 16:31:08 +02001446 int i;
1447 struct nlattr *nest;
Arnd Bergmann27c0b1a2009-11-26 06:07:11 +00001448
David S. Milleread9a762012-04-01 20:23:06 -04001449 if (nla_put_u32(skb, IFLA_MACVLAN_MODE, vlan->mode))
1450 goto nla_put_failure;
John Fastabenddf8ef8f2012-04-15 06:44:37 +00001451 if (nla_put_u16(skb, IFLA_MACVLAN_FLAGS, vlan->flags))
1452 goto nla_put_failure;
Michael Braun79cf79a2014-09-25 16:31:08 +02001453 if (nla_put_u32(skb, IFLA_MACVLAN_MACADDR_COUNT, vlan->macaddr_count))
1454 goto nla_put_failure;
1455 if (vlan->macaddr_count > 0) {
1456 nest = nla_nest_start(skb, IFLA_MACVLAN_MACADDR_DATA);
1457 if (nest == NULL)
1458 goto nla_put_failure;
1459
1460 for (i = 0; i < MACVLAN_HASH_SIZE; i++) {
1461 if (macvlan_fill_info_macaddr(skb, vlan, i))
1462 goto nla_put_failure;
1463 }
1464 nla_nest_end(skb, nest);
1465 }
Arnd Bergmann27c0b1a2009-11-26 06:07:11 +00001466 return 0;
1467
1468nla_put_failure:
1469 return -EMSGSIZE;
1470}
1471
1472static const struct nla_policy macvlan_policy[IFLA_MACVLAN_MAX + 1] = {
John Fastabenddf8ef8f2012-04-15 06:44:37 +00001473 [IFLA_MACVLAN_MODE] = { .type = NLA_U32 },
1474 [IFLA_MACVLAN_FLAGS] = { .type = NLA_U16 },
Michael Braun79cf79a2014-09-25 16:31:08 +02001475 [IFLA_MACVLAN_MACADDR_MODE] = { .type = NLA_U32 },
1476 [IFLA_MACVLAN_MACADDR] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN },
1477 [IFLA_MACVLAN_MACADDR_DATA] = { .type = NLA_NESTED },
1478 [IFLA_MACVLAN_MACADDR_COUNT] = { .type = NLA_U32 },
Arnd Bergmann27c0b1a2009-11-26 06:07:11 +00001479};
1480
Arnd Bergmannfc0663d2010-01-30 12:23:40 +00001481int macvlan_link_register(struct rtnl_link_ops *ops)
1482{
1483 /* common fields */
1484 ops->priv_size = sizeof(struct macvlan_dev);
Arnd Bergmannfc0663d2010-01-30 12:23:40 +00001485 ops->validate = macvlan_validate;
1486 ops->maxtype = IFLA_MACVLAN_MAX;
1487 ops->policy = macvlan_policy;
1488 ops->changelink = macvlan_changelink;
1489 ops->get_size = macvlan_get_size;
1490 ops->fill_info = macvlan_fill_info;
1491
1492 return rtnl_link_register(ops);
1493};
1494EXPORT_SYMBOL_GPL(macvlan_link_register);
1495
Nicolas Dichteleaca4002015-01-20 15:15:45 +01001496static struct net *macvlan_get_link_net(const struct net_device *dev)
1497{
1498 return dev_net(macvlan_dev_real_dev(dev));
1499}
1500
Arnd Bergmannfc0663d2010-01-30 12:23:40 +00001501static struct rtnl_link_ops macvlan_link_ops = {
Patrick McHardyb863ceb2007-07-14 18:55:06 -07001502 .kind = "macvlan",
Herbert Xu8a357472010-07-21 21:44:31 +00001503 .setup = macvlan_setup,
Patrick McHardyb863ceb2007-07-14 18:55:06 -07001504 .newlink = macvlan_newlink,
1505 .dellink = macvlan_dellink,
Nicolas Dichteleaca4002015-01-20 15:15:45 +01001506 .get_link_net = macvlan_get_link_net,
Patrick McHardyb863ceb2007-07-14 18:55:06 -07001507};
1508
1509static int macvlan_device_event(struct notifier_block *unused,
1510 unsigned long event, void *ptr)
1511{
Jiri Pirko351638e2013-05-28 01:30:21 +00001512 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
Patrick McHardyb863ceb2007-07-14 18:55:06 -07001513 struct macvlan_dev *vlan, *next;
1514 struct macvlan_port *port;
Eric Dumazet226bd342011-05-08 23:17:57 +00001515 LIST_HEAD(list_kill);
Patrick McHardyb863ceb2007-07-14 18:55:06 -07001516
Jiri Pirkoa35e2c12010-06-15 03:27:57 +00001517 if (!macvlan_port_exists(dev))
Patrick McHardyb863ceb2007-07-14 18:55:06 -07001518 return NOTIFY_DONE;
1519
Eric Dumazete052f7e2013-03-30 10:08:44 +00001520 port = macvlan_port_get_rtnl(dev);
Jiri Pirkoa35e2c12010-06-15 03:27:57 +00001521
Patrick McHardyb863ceb2007-07-14 18:55:06 -07001522 switch (event) {
1523 case NETDEV_CHANGE:
1524 list_for_each_entry(vlan, &port->vlans, list)
Patrick Mullaneyfc4a7482009-12-03 15:59:22 -08001525 netif_stacked_transfer_operstate(vlan->lowerdev,
1526 vlan->dev);
Patrick McHardyb863ceb2007-07-14 18:55:06 -07001527 break;
1528 case NETDEV_FEAT_CHANGE:
1529 list_for_each_entry(vlan, &port->vlans, list) {
Patrick McHardy8c2acc52009-11-23 14:18:53 -08001530 vlan->dev->gso_max_size = dev->gso_max_size;
Florian Westphal797f87f2013-12-26 12:17:00 +01001531 netdev_update_features(vlan->dev);
Patrick McHardyb863ceb2007-07-14 18:55:06 -07001532 }
1533 break;
dingtianhong3763e7e2014-05-13 14:39:27 +08001534 case NETDEV_CHANGEMTU:
1535 list_for_each_entry(vlan, &port->vlans, list) {
1536 if (vlan->dev->mtu <= dev->mtu)
1537 continue;
1538 dev_set_mtu(vlan->dev, dev->mtu);
1539 }
1540 break;
dingtianhonge289fd22014-05-30 14:32:49 +08001541 case NETDEV_CHANGEADDR:
1542 if (!port->passthru)
1543 return NOTIFY_DONE;
1544
1545 vlan = list_first_entry_or_null(&port->vlans,
1546 struct macvlan_dev,
1547 list);
1548
1549 if (macvlan_sync_address(vlan->dev, dev->dev_addr))
1550 return NOTIFY_BAD;
1551
1552 break;
Patrick McHardyb863ceb2007-07-14 18:55:06 -07001553 case NETDEV_UNREGISTER:
David Lamparter3b27e102010-09-17 03:22:19 +00001554 /* twiddle thumbs on netns device moves */
1555 if (dev->reg_state != NETREG_UNREGISTERING)
1556 break;
1557
Patrick McHardyb863ceb2007-07-14 18:55:06 -07001558 list_for_each_entry_safe(vlan, next, &port->vlans, list)
Eric Dumazet226bd342011-05-08 23:17:57 +00001559 vlan->dev->rtnl_link_ops->dellink(vlan->dev, &list_kill);
1560 unregister_netdevice_many(&list_kill);
Patrick McHardyb863ceb2007-07-14 18:55:06 -07001561 break;
Jiri Pirko1c01fe12010-03-10 10:30:19 +00001562 case NETDEV_PRE_TYPE_CHANGE:
1563 /* Forbid underlaying device to change its type. */
1564 return NOTIFY_BAD;
Vlad Yasevich4c991252014-06-04 16:23:37 -04001565
1566 case NETDEV_NOTIFY_PEERS:
1567 case NETDEV_BONDING_FAILOVER:
1568 case NETDEV_RESEND_IGMP:
1569 /* Propagate to all vlans */
1570 list_for_each_entry(vlan, &port->vlans, list)
1571 call_netdevice_notifiers(event, vlan->dev);
Patrick McHardyb863ceb2007-07-14 18:55:06 -07001572 }
1573 return NOTIFY_DONE;
1574}
1575
1576static struct notifier_block macvlan_notifier_block __read_mostly = {
1577 .notifier_call = macvlan_device_event,
1578};
1579
1580static int __init macvlan_init_module(void)
1581{
1582 int err;
1583
1584 register_netdevice_notifier(&macvlan_notifier_block);
Patrick McHardyb863ceb2007-07-14 18:55:06 -07001585
Arnd Bergmannfc0663d2010-01-30 12:23:40 +00001586 err = macvlan_link_register(&macvlan_link_ops);
Patrick McHardyb863ceb2007-07-14 18:55:06 -07001587 if (err < 0)
1588 goto err1;
1589 return 0;
1590err1:
Patrick McHardyb863ceb2007-07-14 18:55:06 -07001591 unregister_netdevice_notifier(&macvlan_notifier_block);
1592 return err;
1593}
1594
1595static void __exit macvlan_cleanup_module(void)
1596{
1597 rtnl_link_unregister(&macvlan_link_ops);
Patrick McHardyb863ceb2007-07-14 18:55:06 -07001598 unregister_netdevice_notifier(&macvlan_notifier_block);
1599}
1600
1601module_init(macvlan_init_module);
1602module_exit(macvlan_cleanup_module);
1603
1604MODULE_LICENSE("GPL");
1605MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>");
1606MODULE_DESCRIPTION("Driver for MAC address based VLANs");
1607MODULE_ALIAS_RTNL_LINK("macvlan");