Commit | Line | Data |
---|---|---|
b863ceb7 PM |
1 | /* |
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> | |
82524746 | 23 | #include <linux/rculist.h> |
b863ceb7 PM |
24 | #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> | |
87002b03 | 29 | #include <linux/if_vlan.h> |
b863ceb7 PM |
30 | #include <linux/if_link.h> |
31 | #include <linux/if_macvlan.h> | |
cd431e73 | 32 | #include <linux/hash.h> |
412ca155 | 33 | #include <linux/workqueue.h> |
b863ceb7 | 34 | #include <net/rtnetlink.h> |
618e1b74 | 35 | #include <net/xfrm.h> |
b863ceb7 PM |
36 | |
37 | #define MACVLAN_HASH_SIZE (1 << BITS_PER_BYTE) | |
38 | ||
39 | struct macvlan_port { | |
40 | struct net_device *dev; | |
41 | struct hlist_head vlan_hash[MACVLAN_HASH_SIZE]; | |
42 | struct list_head vlans; | |
8b37ef0a | 43 | struct rcu_head rcu; |
412ca155 HX |
44 | struct sk_buff_head bc_queue; |
45 | struct work_struct bc_work; | |
eb06acdc | 46 | bool passthru; |
d5cd9244 | 47 | int count; |
b863ceb7 PM |
48 | }; |
49 | ||
412ca155 HX |
50 | struct macvlan_skb_cb { |
51 | const struct macvlan_dev *src; | |
52 | }; | |
53 | ||
54 | #define MACVLAN_SKB_CB(__skb) ((struct macvlan_skb_cb *)&((__skb)->cb[0])) | |
55 | ||
d5cd9244 EB |
56 | static void macvlan_port_destroy(struct net_device *dev); |
57 | ||
e052f7e6 ED |
58 | static struct macvlan_port *macvlan_port_get_rcu(const struct net_device *dev) |
59 | { | |
60 | return rcu_dereference(dev->rx_handler_data); | |
61 | } | |
62 | ||
63 | static struct macvlan_port *macvlan_port_get_rtnl(const struct net_device *dev) | |
64 | { | |
65 | return rtnl_dereference(dev->rx_handler_data); | |
66 | } | |
67 | ||
a35e2c1b JP |
68 | #define macvlan_port_exists(dev) (dev->priv_flags & IFF_MACVLAN_PORT) |
69 | ||
b863ceb7 PM |
70 | static struct macvlan_dev *macvlan_hash_lookup(const struct macvlan_port *port, |
71 | const unsigned char *addr) | |
72 | { | |
73 | struct macvlan_dev *vlan; | |
b863ceb7 | 74 | |
b67bfe0d | 75 | hlist_for_each_entry_rcu(vlan, &port->vlan_hash[addr[5]], hlist) { |
a6700db1 | 76 | if (ether_addr_equal_64bits(vlan->dev->dev_addr, addr)) |
b863ceb7 PM |
77 | return vlan; |
78 | } | |
79 | return NULL; | |
80 | } | |
81 | ||
f9ac30f0 EB |
82 | static void macvlan_hash_add(struct macvlan_dev *vlan) |
83 | { | |
84 | struct macvlan_port *port = vlan->port; | |
85 | const unsigned char *addr = vlan->dev->dev_addr; | |
86 | ||
87 | hlist_add_head_rcu(&vlan->hlist, &port->vlan_hash[addr[5]]); | |
88 | } | |
89 | ||
449f4544 | 90 | static void macvlan_hash_del(struct macvlan_dev *vlan, bool sync) |
f9ac30f0 EB |
91 | { |
92 | hlist_del_rcu(&vlan->hlist); | |
449f4544 ED |
93 | if (sync) |
94 | synchronize_rcu(); | |
f9ac30f0 EB |
95 | } |
96 | ||
97 | static void macvlan_hash_change_addr(struct macvlan_dev *vlan, | |
98 | const unsigned char *addr) | |
99 | { | |
449f4544 | 100 | macvlan_hash_del(vlan, true); |
f9ac30f0 EB |
101 | /* Now that we are unhashed it is safe to change the device |
102 | * address without confusing packet delivery. | |
103 | */ | |
104 | memcpy(vlan->dev->dev_addr, addr, ETH_ALEN); | |
105 | macvlan_hash_add(vlan); | |
106 | } | |
107 | ||
108 | static int macvlan_addr_busy(const struct macvlan_port *port, | |
109 | const unsigned char *addr) | |
110 | { | |
111 | /* Test to see if the specified multicast address is | |
112 | * currently in use by the underlying device or | |
113 | * another macvlan. | |
114 | */ | |
a6700db1 | 115 | if (ether_addr_equal_64bits(port->dev->dev_addr, addr)) |
f9ac30f0 EB |
116 | return 1; |
117 | ||
118 | if (macvlan_hash_lookup(port, addr)) | |
119 | return 1; | |
120 | ||
121 | return 0; | |
122 | } | |
123 | ||
a1e514c5 | 124 | |
fc0663d6 AB |
125 | static int macvlan_broadcast_one(struct sk_buff *skb, |
126 | const struct macvlan_dev *vlan, | |
618e1b74 | 127 | const struct ethhdr *eth, bool local) |
a1e514c5 | 128 | { |
fc0663d6 | 129 | struct net_device *dev = vlan->dev; |
a1e514c5 | 130 | |
618e1b74 | 131 | if (local) |
412ca155 | 132 | return __dev_forward_skb(dev, skb); |
618e1b74 | 133 | |
a1e514c5 | 134 | skb->dev = dev; |
a6700db1 | 135 | if (ether_addr_equal_64bits(eth->h_dest, dev->broadcast)) |
a1e514c5 AB |
136 | skb->pkt_type = PACKET_BROADCAST; |
137 | else | |
138 | skb->pkt_type = PACKET_MULTICAST; | |
139 | ||
412ca155 | 140 | return 0; |
a1e514c5 AB |
141 | } |
142 | ||
3807ff58 ED |
143 | static u32 macvlan_hash_mix(const struct macvlan_dev *vlan) |
144 | { | |
145 | return (u32)(((unsigned long)vlan) >> L1_CACHE_SHIFT); | |
146 | } | |
147 | ||
148 | ||
149 | static unsigned int mc_hash(const struct macvlan_dev *vlan, | |
150 | const unsigned char *addr) | |
cd431e73 ED |
151 | { |
152 | u32 val = __get_unaligned_cpu32(addr + 2); | |
153 | ||
3807ff58 | 154 | val ^= macvlan_hash_mix(vlan); |
cd431e73 ED |
155 | return hash_32(val, MACVLAN_MC_FILTER_BITS); |
156 | } | |
157 | ||
b863ceb7 | 158 | static void macvlan_broadcast(struct sk_buff *skb, |
618e1b74 AB |
159 | const struct macvlan_port *port, |
160 | struct net_device *src, | |
161 | enum macvlan_mode mode) | |
b863ceb7 PM |
162 | { |
163 | const struct ethhdr *eth = eth_hdr(skb); | |
164 | const struct macvlan_dev *vlan; | |
b863ceb7 PM |
165 | struct sk_buff *nskb; |
166 | unsigned int i; | |
a1e514c5 | 167 | int err; |
3807ff58 | 168 | unsigned int hash; |
b863ceb7 | 169 | |
efbbced3 PM |
170 | if (skb->protocol == htons(ETH_P_PAUSE)) |
171 | return; | |
172 | ||
b863ceb7 | 173 | for (i = 0; i < MACVLAN_HASH_SIZE; i++) { |
b67bfe0d | 174 | hlist_for_each_entry_rcu(vlan, &port->vlan_hash[i], hlist) { |
618e1b74 AB |
175 | if (vlan->dev == src || !(vlan->mode & mode)) |
176 | continue; | |
177 | ||
3807ff58 | 178 | hash = mc_hash(vlan, eth->h_dest); |
cd431e73 ED |
179 | if (!test_bit(hash, vlan->mc_filter)) |
180 | continue; | |
de9e8f3f HX |
181 | |
182 | err = NET_RX_DROP; | |
b863ceb7 | 183 | nskb = skb_clone(skb, GFP_ATOMIC); |
de9e8f3f HX |
184 | if (likely(nskb)) |
185 | err = macvlan_broadcast_one( | |
186 | nskb, vlan, eth, | |
412ca155 HX |
187 | mode == MACVLAN_MODE_BRIDGE) ?: |
188 | netif_rx_ni(nskb); | |
a1e514c5 AB |
189 | macvlan_count_rx(vlan, skb->len + ETH_HLEN, |
190 | err == NET_RX_SUCCESS, 1); | |
b863ceb7 PM |
191 | } |
192 | } | |
193 | } | |
194 | ||
412ca155 | 195 | static void macvlan_process_broadcast(struct work_struct *w) |
b863ceb7 | 196 | { |
412ca155 HX |
197 | struct macvlan_port *port = container_of(w, struct macvlan_port, |
198 | bc_work); | |
199 | struct sk_buff *skb; | |
200 | struct sk_buff_head list; | |
201 | ||
202 | skb_queue_head_init(&list); | |
203 | ||
204 | spin_lock_bh(&port->bc_queue.lock); | |
205 | skb_queue_splice_tail_init(&port->bc_queue, &list); | |
206 | spin_unlock_bh(&port->bc_queue.lock); | |
207 | ||
208 | while ((skb = __skb_dequeue(&list))) { | |
209 | const struct macvlan_dev *src = MACVLAN_SKB_CB(skb)->src; | |
210 | ||
211 | rcu_read_lock(); | |
b863ceb7 | 212 | |
618e1b74 AB |
213 | if (!src) |
214 | /* frame comes from an external address */ | |
215 | macvlan_broadcast(skb, port, NULL, | |
216 | MACVLAN_MODE_PRIVATE | | |
217 | MACVLAN_MODE_VEPA | | |
eb06acdc | 218 | MACVLAN_MODE_PASSTHRU| |
618e1b74 AB |
219 | MACVLAN_MODE_BRIDGE); |
220 | else if (src->mode == MACVLAN_MODE_VEPA) | |
221 | /* flood to everyone except source */ | |
222 | macvlan_broadcast(skb, port, src->dev, | |
223 | MACVLAN_MODE_VEPA | | |
224 | MACVLAN_MODE_BRIDGE); | |
412ca155 | 225 | else |
618e1b74 AB |
226 | /* |
227 | * flood only to VEPA ports, bridge ports | |
228 | * already saw the frame on the way out. | |
229 | */ | |
230 | macvlan_broadcast(skb, port, src->dev, | |
231 | MACVLAN_MODE_VEPA); | |
412ca155 HX |
232 | |
233 | rcu_read_unlock(); | |
234 | ||
235 | kfree_skb(skb); | |
236 | } | |
237 | } | |
238 | ||
239 | static void macvlan_broadcast_enqueue(struct macvlan_port *port, | |
240 | struct sk_buff *skb) | |
241 | { | |
242 | int err = -ENOMEM; | |
243 | ||
244 | skb = skb_clone(skb, GFP_ATOMIC); | |
245 | if (!skb) | |
246 | goto err; | |
247 | ||
248 | spin_lock(&port->bc_queue.lock); | |
249 | if (skb_queue_len(&port->bc_queue) < skb->dev->tx_queue_len) { | |
250 | __skb_queue_tail(&port->bc_queue, skb); | |
251 | err = 0; | |
252 | } | |
253 | spin_unlock(&port->bc_queue.lock); | |
254 | ||
255 | if (err) | |
256 | goto err; | |
257 | ||
258 | schedule_work(&port->bc_work); | |
259 | return; | |
260 | ||
261 | err: | |
262 | atomic_long_inc(&skb->dev->rx_dropped); | |
263 | } | |
264 | ||
265 | /* called under rcu_read_lock() from netif_receive_skb */ | |
266 | static rx_handler_result_t macvlan_handle_frame(struct sk_buff **pskb) | |
267 | { | |
268 | struct macvlan_port *port; | |
269 | struct sk_buff *skb = *pskb; | |
270 | const struct ethhdr *eth = eth_hdr(skb); | |
271 | const struct macvlan_dev *vlan; | |
272 | const struct macvlan_dev *src; | |
273 | struct net_device *dev; | |
274 | unsigned int len = 0; | |
275 | int ret = NET_RX_DROP; | |
276 | ||
277 | port = macvlan_port_get_rcu(skb->dev); | |
278 | if (is_multicast_ether_addr(eth->h_dest)) { | |
279 | skb = ip_check_defrag(skb, IP_DEFRAG_MACVLAN); | |
280 | if (!skb) | |
281 | return RX_HANDLER_CONSUMED; | |
282 | eth = eth_hdr(skb); | |
283 | src = macvlan_hash_lookup(port, eth->h_source); | |
284 | if (src && src->mode != MACVLAN_MODE_VEPA && | |
285 | src->mode != MACVLAN_MODE_BRIDGE) { | |
729e72a1 | 286 | /* forward to original port. */ |
287 | vlan = src; | |
412ca155 HX |
288 | ret = macvlan_broadcast_one(skb, vlan, eth, 0) ?: |
289 | netif_rx(skb); | |
729e72a1 | 290 | goto out; |
291 | } | |
292 | ||
412ca155 HX |
293 | MACVLAN_SKB_CB(skb)->src = src; |
294 | macvlan_broadcast_enqueue(port, skb); | |
295 | ||
8a4eb573 | 296 | return RX_HANDLER_PASS; |
b863ceb7 PM |
297 | } |
298 | ||
eb06acdc | 299 | if (port->passthru) |
233c7df0 JP |
300 | vlan = list_first_or_null_rcu(&port->vlans, |
301 | struct macvlan_dev, list); | |
eb06acdc SS |
302 | else |
303 | vlan = macvlan_hash_lookup(port, eth->h_dest); | |
b863ceb7 | 304 | if (vlan == NULL) |
8a4eb573 | 305 | return RX_HANDLER_PASS; |
b863ceb7 PM |
306 | |
307 | dev = vlan->dev; | |
308 | if (unlikely(!(dev->flags & IFF_UP))) { | |
309 | kfree_skb(skb); | |
8a4eb573 | 310 | return RX_HANDLER_CONSUMED; |
b863ceb7 | 311 | } |
a1e514c5 | 312 | len = skb->len + ETH_HLEN; |
b863ceb7 | 313 | skb = skb_share_check(skb, GFP_ATOMIC); |
a1e514c5 | 314 | if (!skb) |
ba01877f | 315 | goto out; |
b863ceb7 PM |
316 | |
317 | skb->dev = dev; | |
318 | skb->pkt_type = PACKET_HOST; | |
319 | ||
2f6a1b66 | 320 | ret = netif_rx(skb); |
ba01877f SS |
321 | |
322 | out: | |
323 | macvlan_count_rx(vlan, len, ret == NET_RX_SUCCESS, 0); | |
8a4eb573 | 324 | return RX_HANDLER_CONSUMED; |
b863ceb7 PM |
325 | } |
326 | ||
618e1b74 AB |
327 | static int macvlan_queue_xmit(struct sk_buff *skb, struct net_device *dev) |
328 | { | |
329 | const struct macvlan_dev *vlan = netdev_priv(dev); | |
330 | const struct macvlan_port *port = vlan->port; | |
331 | const struct macvlan_dev *dest; | |
12a2856b | 332 | __u8 ip_summed = skb->ip_summed; |
618e1b74 AB |
333 | |
334 | if (vlan->mode == MACVLAN_MODE_BRIDGE) { | |
335 | const struct ethhdr *eth = (void *)skb->data; | |
12a2856b | 336 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
618e1b74 AB |
337 | |
338 | /* send to other bridge ports directly */ | |
339 | if (is_multicast_ether_addr(eth->h_dest)) { | |
340 | macvlan_broadcast(skb, port, dev, MACVLAN_MODE_BRIDGE); | |
341 | goto xmit_world; | |
342 | } | |
343 | ||
344 | dest = macvlan_hash_lookup(port, eth->h_dest); | |
345 | if (dest && dest->mode == MACVLAN_MODE_BRIDGE) { | |
a37dd333 | 346 | /* send to lowerdev first for its network taps */ |
cb2d0f3e | 347 | dev_forward_skb(vlan->lowerdev, skb); |
618e1b74 AB |
348 | |
349 | return NET_XMIT_SUCCESS; | |
350 | } | |
351 | } | |
352 | ||
353 | xmit_world: | |
12a2856b | 354 | skb->ip_summed = ip_summed; |
59b9997b | 355 | skb->dev = vlan->lowerdev; |
618e1b74 AB |
356 | return dev_queue_xmit(skb); |
357 | } | |
358 | ||
0db901bd | 359 | static netdev_tx_t macvlan_start_xmit(struct sk_buff *skb, |
360 | struct net_device *dev) | |
b863ceb7 | 361 | { |
b863ceb7 PM |
362 | unsigned int len = skb->len; |
363 | int ret; | |
8ffab51b | 364 | const struct macvlan_dev *vlan = netdev_priv(dev); |
b863ceb7 | 365 | |
a6cc0cfa JF |
366 | if (vlan->fwd_priv) { |
367 | skb->dev = vlan->lowerdev; | |
f663dd9a | 368 | ret = dev_queue_xmit_accel(skb, vlan->fwd_priv); |
a6cc0cfa JF |
369 | } else { |
370 | ret = macvlan_queue_xmit(skb, dev); | |
371 | } | |
372 | ||
2d6c9ffc | 373 | if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) { |
cdf3e274 | 374 | struct vlan_pcpu_stats *pcpu_stats; |
2c114553 | 375 | |
8ffab51b ED |
376 | pcpu_stats = this_cpu_ptr(vlan->pcpu_stats); |
377 | u64_stats_update_begin(&pcpu_stats->syncp); | |
378 | pcpu_stats->tx_packets++; | |
379 | pcpu_stats->tx_bytes += len; | |
380 | u64_stats_update_end(&pcpu_stats->syncp); | |
381 | } else { | |
382 | this_cpu_inc(vlan->pcpu_stats->tx_dropped); | |
383 | } | |
cbbef5e1 | 384 | return ret; |
b863ceb7 PM |
385 | } |
386 | ||
387 | static int macvlan_hard_header(struct sk_buff *skb, struct net_device *dev, | |
3b04ddde SH |
388 | unsigned short type, const void *daddr, |
389 | const void *saddr, unsigned len) | |
b863ceb7 PM |
390 | { |
391 | const struct macvlan_dev *vlan = netdev_priv(dev); | |
392 | struct net_device *lowerdev = vlan->lowerdev; | |
393 | ||
0c4e8581 SH |
394 | return dev_hard_header(skb, lowerdev, type, daddr, |
395 | saddr ? : dev->dev_addr, len); | |
b863ceb7 PM |
396 | } |
397 | ||
3b04ddde SH |
398 | static const struct header_ops macvlan_hard_header_ops = { |
399 | .create = macvlan_hard_header, | |
400 | .rebuild = eth_rebuild_header, | |
401 | .parse = eth_header_parse, | |
3b04ddde SH |
402 | .cache = eth_header_cache, |
403 | .cache_update = eth_header_cache_update, | |
404 | }; | |
405 | ||
b13ba1b8 JW |
406 | static struct rtnl_link_ops macvlan_link_ops; |
407 | ||
b863ceb7 PM |
408 | static int macvlan_open(struct net_device *dev) |
409 | { | |
410 | struct macvlan_dev *vlan = netdev_priv(dev); | |
b863ceb7 PM |
411 | struct net_device *lowerdev = vlan->lowerdev; |
412 | int err; | |
413 | ||
eb06acdc | 414 | if (vlan->port->passthru) { |
78738141 MT |
415 | if (!(vlan->flags & MACVLAN_FLAG_NOPROMISC)) { |
416 | err = dev_set_promiscuity(lowerdev, 1); | |
417 | if (err < 0) | |
418 | goto out; | |
419 | } | |
eb06acdc SS |
420 | goto hash_add; |
421 | } | |
422 | ||
b13ba1b8 JW |
423 | if (lowerdev->features & NETIF_F_HW_L2FW_DOFFLOAD && |
424 | dev->rtnl_link_ops == &macvlan_link_ops) { | |
a6cc0cfa JF |
425 | vlan->fwd_priv = |
426 | lowerdev->netdev_ops->ndo_dfwd_add_station(lowerdev, dev); | |
427 | ||
428 | /* If we get a NULL pointer back, or if we get an error | |
429 | * then we should just fall through to the non accelerated path | |
430 | */ | |
431 | if (IS_ERR_OR_NULL(vlan->fwd_priv)) { | |
432 | vlan->fwd_priv = NULL; | |
f663dd9a | 433 | } else |
a6cc0cfa | 434 | return 0; |
a6cc0cfa JF |
435 | } |
436 | ||
f9ac30f0 EB |
437 | err = -EBUSY; |
438 | if (macvlan_addr_busy(vlan->port, dev->dev_addr)) | |
439 | goto out; | |
440 | ||
a748ee24 | 441 | err = dev_uc_add(lowerdev, dev->dev_addr); |
b863ceb7 | 442 | if (err < 0) |
b89fb7da WC |
443 | goto out; |
444 | if (dev->flags & IFF_ALLMULTI) { | |
445 | err = dev_set_allmulti(lowerdev, 1); | |
446 | if (err < 0) | |
447 | goto del_unicast; | |
448 | } | |
eb06acdc SS |
449 | |
450 | hash_add: | |
f9ac30f0 | 451 | macvlan_hash_add(vlan); |
b863ceb7 | 452 | return 0; |
b89fb7da WC |
453 | |
454 | del_unicast: | |
a748ee24 | 455 | dev_uc_del(lowerdev, dev->dev_addr); |
b89fb7da | 456 | out: |
a6cc0cfa JF |
457 | if (vlan->fwd_priv) { |
458 | lowerdev->netdev_ops->ndo_dfwd_del_station(lowerdev, | |
459 | vlan->fwd_priv); | |
460 | vlan->fwd_priv = NULL; | |
461 | } | |
b89fb7da | 462 | return err; |
b863ceb7 PM |
463 | } |
464 | ||
465 | static int macvlan_stop(struct net_device *dev) | |
466 | { | |
467 | struct macvlan_dev *vlan = netdev_priv(dev); | |
468 | struct net_device *lowerdev = vlan->lowerdev; | |
469 | ||
a6cc0cfa JF |
470 | if (vlan->fwd_priv) { |
471 | lowerdev->netdev_ops->ndo_dfwd_del_station(lowerdev, | |
472 | vlan->fwd_priv); | |
473 | vlan->fwd_priv = NULL; | |
474 | return 0; | |
475 | } | |
476 | ||
df8ef8f3 JF |
477 | dev_uc_unsync(lowerdev, dev); |
478 | dev_mc_unsync(lowerdev, dev); | |
479 | ||
eb06acdc | 480 | if (vlan->port->passthru) { |
df8ef8f3 JF |
481 | if (!(vlan->flags & MACVLAN_FLAG_NOPROMISC)) |
482 | dev_set_promiscuity(lowerdev, -1); | |
eb06acdc SS |
483 | goto hash_del; |
484 | } | |
485 | ||
b863ceb7 PM |
486 | if (dev->flags & IFF_ALLMULTI) |
487 | dev_set_allmulti(lowerdev, -1); | |
488 | ||
a748ee24 | 489 | dev_uc_del(lowerdev, dev->dev_addr); |
b863ceb7 | 490 | |
eb06acdc | 491 | hash_del: |
449f4544 | 492 | macvlan_hash_del(vlan, !dev->dismantle); |
b863ceb7 PM |
493 | return 0; |
494 | } | |
495 | ||
ad5d20a6 PM |
496 | static int macvlan_set_mac_address(struct net_device *dev, void *p) |
497 | { | |
498 | struct macvlan_dev *vlan = netdev_priv(dev); | |
499 | struct net_device *lowerdev = vlan->lowerdev; | |
500 | struct sockaddr *addr = p; | |
501 | int err; | |
502 | ||
503 | if (!is_valid_ether_addr(addr->sa_data)) | |
504 | return -EADDRNOTAVAIL; | |
505 | ||
f9ac30f0 EB |
506 | if (!(dev->flags & IFF_UP)) { |
507 | /* Just copy in the new address */ | |
508 | memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN); | |
509 | } else { | |
510 | /* Rehash and update the device filters */ | |
511 | if (macvlan_addr_busy(vlan->port, addr->sa_data)) | |
512 | return -EBUSY; | |
ad5d20a6 | 513 | |
a748ee24 | 514 | err = dev_uc_add(lowerdev, addr->sa_data); |
ccffad25 | 515 | if (err) |
f9ac30f0 | 516 | return err; |
ad5d20a6 | 517 | |
a748ee24 | 518 | dev_uc_del(lowerdev, dev->dev_addr); |
f9ac30f0 EB |
519 | |
520 | macvlan_hash_change_addr(vlan, addr->sa_data); | |
521 | } | |
ad5d20a6 PM |
522 | return 0; |
523 | } | |
524 | ||
b863ceb7 PM |
525 | static void macvlan_change_rx_flags(struct net_device *dev, int change) |
526 | { | |
527 | struct macvlan_dev *vlan = netdev_priv(dev); | |
528 | struct net_device *lowerdev = vlan->lowerdev; | |
529 | ||
530 | if (change & IFF_ALLMULTI) | |
531 | dev_set_allmulti(lowerdev, dev->flags & IFF_ALLMULTI ? 1 : -1); | |
532 | } | |
533 | ||
df8ef8f3 | 534 | static void macvlan_set_mac_lists(struct net_device *dev) |
b863ceb7 PM |
535 | { |
536 | struct macvlan_dev *vlan = netdev_priv(dev); | |
537 | ||
cd431e73 ED |
538 | if (dev->flags & (IFF_PROMISC | IFF_ALLMULTI)) { |
539 | bitmap_fill(vlan->mc_filter, MACVLAN_MC_FILTER_SZ); | |
540 | } else { | |
541 | struct netdev_hw_addr *ha; | |
542 | DECLARE_BITMAP(filter, MACVLAN_MC_FILTER_SZ); | |
543 | ||
544 | bitmap_zero(filter, MACVLAN_MC_FILTER_SZ); | |
545 | netdev_for_each_mc_addr(ha, dev) { | |
3807ff58 | 546 | __set_bit(mc_hash(vlan, ha->addr), filter); |
cd431e73 | 547 | } |
d5270430 | 548 | |
3807ff58 | 549 | __set_bit(mc_hash(vlan, dev->broadcast), filter); |
d5270430 | 550 | |
cd431e73 ED |
551 | bitmap_copy(vlan->mc_filter, filter, MACVLAN_MC_FILTER_SZ); |
552 | } | |
df8ef8f3 | 553 | dev_uc_sync(vlan->lowerdev, dev); |
b863ceb7 PM |
554 | dev_mc_sync(vlan->lowerdev, dev); |
555 | } | |
556 | ||
557 | static int macvlan_change_mtu(struct net_device *dev, int new_mtu) | |
558 | { | |
559 | struct macvlan_dev *vlan = netdev_priv(dev); | |
560 | ||
561 | if (new_mtu < 68 || vlan->lowerdev->mtu < new_mtu) | |
562 | return -EINVAL; | |
563 | dev->mtu = new_mtu; | |
564 | return 0; | |
565 | } | |
566 | ||
567 | /* | |
568 | * macvlan network devices have devices nesting below it and are a special | |
569 | * "super class" of normal network devices; split their locks off into a | |
570 | * separate class since they always nest. | |
571 | */ | |
572 | static struct lock_class_key macvlan_netdev_xmit_lock_key; | |
cf508b12 | 573 | static struct lock_class_key macvlan_netdev_addr_lock_key; |
b863ceb7 | 574 | |
8b4703e9 VY |
575 | #define ALWAYS_ON_FEATURES \ |
576 | (NETIF_F_SG | NETIF_F_GEN_CSUM | NETIF_F_GSO_SOFTWARE | NETIF_F_LLTX) | |
577 | ||
b863ceb7 PM |
578 | #define MACVLAN_FEATURES \ |
579 | (NETIF_F_SG | NETIF_F_ALL_CSUM | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST | \ | |
580 | NETIF_F_GSO | NETIF_F_TSO | NETIF_F_UFO | NETIF_F_GSO_ROBUST | \ | |
8d13e670 | 581 | NETIF_F_TSO_ECN | NETIF_F_TSO6 | NETIF_F_GRO | NETIF_F_RXCSUM | \ |
28d2b136 | 582 | NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_HW_VLAN_STAG_FILTER) |
b863ceb7 PM |
583 | |
584 | #define MACVLAN_STATE_MASK \ | |
585 | ((1<<__LINK_STATE_NOCARRIER) | (1<<__LINK_STATE_DORMANT)) | |
586 | ||
e8a0464c DM |
587 | static void macvlan_set_lockdep_class_one(struct net_device *dev, |
588 | struct netdev_queue *txq, | |
589 | void *_unused) | |
c773e847 DM |
590 | { |
591 | lockdep_set_class(&txq->_xmit_lock, | |
592 | &macvlan_netdev_xmit_lock_key); | |
593 | } | |
594 | ||
595 | static void macvlan_set_lockdep_class(struct net_device *dev) | |
596 | { | |
cf508b12 DM |
597 | lockdep_set_class(&dev->addr_list_lock, |
598 | &macvlan_netdev_addr_lock_key); | |
e8a0464c | 599 | netdev_for_each_tx_queue(dev, macvlan_set_lockdep_class_one, NULL); |
c773e847 DM |
600 | } |
601 | ||
b863ceb7 PM |
602 | static int macvlan_init(struct net_device *dev) |
603 | { | |
604 | struct macvlan_dev *vlan = netdev_priv(dev); | |
605 | const struct net_device *lowerdev = vlan->lowerdev; | |
606 | ||
607 | dev->state = (dev->state & ~MACVLAN_STATE_MASK) | | |
608 | (lowerdev->state & MACVLAN_STATE_MASK); | |
609 | dev->features = lowerdev->features & MACVLAN_FEATURES; | |
8b4703e9 | 610 | dev->features |= ALWAYS_ON_FEATURES; |
8c2acc53 | 611 | dev->gso_max_size = lowerdev->gso_max_size; |
b863ceb7 | 612 | dev->iflink = lowerdev->ifindex; |
ef5c8996 | 613 | dev->hard_header_len = lowerdev->hard_header_len; |
b863ceb7 | 614 | |
c773e847 DM |
615 | macvlan_set_lockdep_class(dev); |
616 | ||
1c213bd2 | 617 | vlan->pcpu_stats = netdev_alloc_pcpu_stats(struct vlan_pcpu_stats); |
8ffab51b | 618 | if (!vlan->pcpu_stats) |
fccaf710 ED |
619 | return -ENOMEM; |
620 | ||
b863ceb7 PM |
621 | return 0; |
622 | } | |
623 | ||
fccaf710 ED |
624 | static void macvlan_uninit(struct net_device *dev) |
625 | { | |
626 | struct macvlan_dev *vlan = netdev_priv(dev); | |
d5cd9244 | 627 | struct macvlan_port *port = vlan->port; |
fccaf710 | 628 | |
8ffab51b | 629 | free_percpu(vlan->pcpu_stats); |
d5cd9244 EB |
630 | |
631 | port->count -= 1; | |
632 | if (!port->count) | |
633 | macvlan_port_destroy(port->dev); | |
fccaf710 ED |
634 | } |
635 | ||
28172739 ED |
636 | static struct rtnl_link_stats64 *macvlan_dev_get_stats64(struct net_device *dev, |
637 | struct rtnl_link_stats64 *stats) | |
fccaf710 | 638 | { |
fccaf710 ED |
639 | struct macvlan_dev *vlan = netdev_priv(dev); |
640 | ||
8ffab51b | 641 | if (vlan->pcpu_stats) { |
cdf3e274 | 642 | struct vlan_pcpu_stats *p; |
8ffab51b ED |
643 | u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes; |
644 | u32 rx_errors = 0, tx_dropped = 0; | |
bc66154e | 645 | unsigned int start; |
fccaf710 ED |
646 | int i; |
647 | ||
648 | for_each_possible_cpu(i) { | |
8ffab51b | 649 | p = per_cpu_ptr(vlan->pcpu_stats, i); |
bc66154e | 650 | do { |
57a7744e | 651 | start = u64_stats_fetch_begin_irq(&p->syncp); |
bc66154e ED |
652 | rx_packets = p->rx_packets; |
653 | rx_bytes = p->rx_bytes; | |
654 | rx_multicast = p->rx_multicast; | |
8ffab51b ED |
655 | tx_packets = p->tx_packets; |
656 | tx_bytes = p->tx_bytes; | |
57a7744e | 657 | } while (u64_stats_fetch_retry_irq(&p->syncp, start)); |
8ffab51b ED |
658 | |
659 | stats->rx_packets += rx_packets; | |
660 | stats->rx_bytes += rx_bytes; | |
661 | stats->multicast += rx_multicast; | |
662 | stats->tx_packets += tx_packets; | |
663 | stats->tx_bytes += tx_bytes; | |
664 | /* rx_errors & tx_dropped are u32, updated | |
665 | * without syncp protection. | |
666 | */ | |
667 | rx_errors += p->rx_errors; | |
668 | tx_dropped += p->tx_dropped; | |
fccaf710 | 669 | } |
8ffab51b ED |
670 | stats->rx_errors = rx_errors; |
671 | stats->rx_dropped = rx_errors; | |
672 | stats->tx_dropped = tx_dropped; | |
fccaf710 ED |
673 | } |
674 | return stats; | |
675 | } | |
676 | ||
8e586137 | 677 | static int macvlan_vlan_rx_add_vid(struct net_device *dev, |
80d5c368 | 678 | __be16 proto, u16 vid) |
8d13e670 JF |
679 | { |
680 | struct macvlan_dev *vlan = netdev_priv(dev); | |
681 | struct net_device *lowerdev = vlan->lowerdev; | |
8d13e670 | 682 | |
80d5c368 | 683 | return vlan_vid_add(lowerdev, proto, vid); |
8d13e670 JF |
684 | } |
685 | ||
8e586137 | 686 | static int macvlan_vlan_rx_kill_vid(struct net_device *dev, |
80d5c368 | 687 | __be16 proto, u16 vid) |
8d13e670 JF |
688 | { |
689 | struct macvlan_dev *vlan = netdev_priv(dev); | |
690 | struct net_device *lowerdev = vlan->lowerdev; | |
8d13e670 | 691 | |
80d5c368 | 692 | vlan_vid_del(lowerdev, proto, vid); |
8e586137 | 693 | return 0; |
8d13e670 JF |
694 | } |
695 | ||
edc7d573 | 696 | static int macvlan_fdb_add(struct ndmsg *ndm, struct nlattr *tb[], |
df8ef8f3 | 697 | struct net_device *dev, |
6b6e2725 | 698 | const unsigned char *addr, |
df8ef8f3 JF |
699 | u16 flags) |
700 | { | |
701 | struct macvlan_dev *vlan = netdev_priv(dev); | |
702 | int err = -EINVAL; | |
703 | ||
704 | if (!vlan->port->passthru) | |
705 | return -EOPNOTSUPP; | |
706 | ||
ab2cfbb2 TR |
707 | if (flags & NLM_F_REPLACE) |
708 | return -EOPNOTSUPP; | |
709 | ||
df8ef8f3 JF |
710 | if (is_unicast_ether_addr(addr)) |
711 | err = dev_uc_add_excl(dev, addr); | |
712 | else if (is_multicast_ether_addr(addr)) | |
713 | err = dev_mc_add_excl(dev, addr); | |
714 | ||
715 | return err; | |
716 | } | |
717 | ||
1690be63 | 718 | static int macvlan_fdb_del(struct ndmsg *ndm, struct nlattr *tb[], |
df8ef8f3 | 719 | struct net_device *dev, |
6b6e2725 | 720 | const unsigned char *addr) |
df8ef8f3 JF |
721 | { |
722 | struct macvlan_dev *vlan = netdev_priv(dev); | |
723 | int err = -EINVAL; | |
724 | ||
725 | if (!vlan->port->passthru) | |
726 | return -EOPNOTSUPP; | |
727 | ||
728 | if (is_unicast_ether_addr(addr)) | |
729 | err = dev_uc_del(dev, addr); | |
730 | else if (is_multicast_ether_addr(addr)) | |
731 | err = dev_mc_del(dev, addr); | |
732 | ||
733 | return err; | |
734 | } | |
735 | ||
b863ceb7 PM |
736 | static void macvlan_ethtool_get_drvinfo(struct net_device *dev, |
737 | struct ethtool_drvinfo *drvinfo) | |
738 | { | |
7826d43f JP |
739 | strlcpy(drvinfo->driver, "macvlan", sizeof(drvinfo->driver)); |
740 | strlcpy(drvinfo->version, "0.1", sizeof(drvinfo->version)); | |
b863ceb7 PM |
741 | } |
742 | ||
9edb8bb6 SH |
743 | static int macvlan_ethtool_get_settings(struct net_device *dev, |
744 | struct ethtool_cmd *cmd) | |
745 | { | |
746 | const struct macvlan_dev *vlan = netdev_priv(dev); | |
4bc71cb9 JP |
747 | |
748 | return __ethtool_get_settings(vlan->lowerdev, cmd); | |
9edb8bb6 SH |
749 | } |
750 | ||
2be5c767 VY |
751 | static netdev_features_t macvlan_fix_features(struct net_device *dev, |
752 | netdev_features_t features) | |
753 | { | |
754 | struct macvlan_dev *vlan = netdev_priv(dev); | |
797f87f8 | 755 | netdev_features_t mask; |
2be5c767 | 756 | |
797f87f8 FW |
757 | features |= NETIF_F_ALL_FOR_ALL; |
758 | features &= (vlan->set_features | ~MACVLAN_FEATURES); | |
759 | mask = features; | |
760 | ||
761 | features = netdev_increment_features(vlan->lowerdev->features, | |
762 | features, | |
763 | mask); | |
8b4703e9 | 764 | features |= ALWAYS_ON_FEATURES; |
797f87f8 FW |
765 | |
766 | return features; | |
2be5c767 VY |
767 | } |
768 | ||
b863ceb7 PM |
769 | static const struct ethtool_ops macvlan_ethtool_ops = { |
770 | .get_link = ethtool_op_get_link, | |
9edb8bb6 | 771 | .get_settings = macvlan_ethtool_get_settings, |
b863ceb7 PM |
772 | .get_drvinfo = macvlan_ethtool_get_drvinfo, |
773 | }; | |
774 | ||
54a30c97 SH |
775 | static const struct net_device_ops macvlan_netdev_ops = { |
776 | .ndo_init = macvlan_init, | |
fccaf710 | 777 | .ndo_uninit = macvlan_uninit, |
54a30c97 SH |
778 | .ndo_open = macvlan_open, |
779 | .ndo_stop = macvlan_stop, | |
00829823 | 780 | .ndo_start_xmit = macvlan_start_xmit, |
54a30c97 | 781 | .ndo_change_mtu = macvlan_change_mtu, |
2be5c767 | 782 | .ndo_fix_features = macvlan_fix_features, |
54a30c97 SH |
783 | .ndo_change_rx_flags = macvlan_change_rx_flags, |
784 | .ndo_set_mac_address = macvlan_set_mac_address, | |
df8ef8f3 | 785 | .ndo_set_rx_mode = macvlan_set_mac_lists, |
bc66154e | 786 | .ndo_get_stats64 = macvlan_dev_get_stats64, |
54a30c97 | 787 | .ndo_validate_addr = eth_validate_addr, |
8d13e670 JF |
788 | .ndo_vlan_rx_add_vid = macvlan_vlan_rx_add_vid, |
789 | .ndo_vlan_rx_kill_vid = macvlan_vlan_rx_kill_vid, | |
df8ef8f3 JF |
790 | .ndo_fdb_add = macvlan_fdb_add, |
791 | .ndo_fdb_del = macvlan_fdb_del, | |
792 | .ndo_fdb_dump = ndo_dflt_fdb_dump, | |
54a30c97 SH |
793 | }; |
794 | ||
8a35747a | 795 | void macvlan_common_setup(struct net_device *dev) |
b863ceb7 PM |
796 | { |
797 | ether_setup(dev); | |
798 | ||
550fd08c | 799 | dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING); |
87ab7f6f | 800 | dev->priv_flags |= IFF_UNICAST_FLT; |
54a30c97 | 801 | dev->netdev_ops = &macvlan_netdev_ops; |
b863ceb7 | 802 | dev->destructor = free_netdev; |
71740129 | 803 | dev->header_ops = &macvlan_hard_header_ops; |
b863ceb7 | 804 | dev->ethtool_ops = &macvlan_ethtool_ops; |
8a35747a HX |
805 | } |
806 | EXPORT_SYMBOL_GPL(macvlan_common_setup); | |
807 | ||
808 | static void macvlan_setup(struct net_device *dev) | |
809 | { | |
810 | macvlan_common_setup(dev); | |
b863ceb7 PM |
811 | dev->tx_queue_len = 0; |
812 | } | |
813 | ||
814 | static int macvlan_port_create(struct net_device *dev) | |
815 | { | |
816 | struct macvlan_port *port; | |
817 | unsigned int i; | |
ab95bfe0 | 818 | int err; |
b863ceb7 PM |
819 | |
820 | if (dev->type != ARPHRD_ETHER || dev->flags & IFF_LOOPBACK) | |
821 | return -EINVAL; | |
822 | ||
823 | port = kzalloc(sizeof(*port), GFP_KERNEL); | |
824 | if (port == NULL) | |
825 | return -ENOMEM; | |
826 | ||
eb06acdc | 827 | port->passthru = false; |
b863ceb7 PM |
828 | port->dev = dev; |
829 | INIT_LIST_HEAD(&port->vlans); | |
830 | for (i = 0; i < MACVLAN_HASH_SIZE; i++) | |
831 | INIT_HLIST_HEAD(&port->vlan_hash[i]); | |
ab95bfe0 | 832 | |
412ca155 HX |
833 | skb_queue_head_init(&port->bc_queue); |
834 | INIT_WORK(&port->bc_work, macvlan_process_broadcast); | |
835 | ||
a35e2c1b JP |
836 | err = netdev_rx_handler_register(dev, macvlan_handle_frame, port); |
837 | if (err) | |
ab95bfe0 | 838 | kfree(port); |
d9351561 ED |
839 | else |
840 | dev->priv_flags |= IFF_MACVLAN_PORT; | |
ab95bfe0 | 841 | return err; |
b863ceb7 PM |
842 | } |
843 | ||
844 | static void macvlan_port_destroy(struct net_device *dev) | |
845 | { | |
e052f7e6 | 846 | struct macvlan_port *port = macvlan_port_get_rtnl(dev); |
b863ceb7 | 847 | |
412ca155 | 848 | cancel_work_sync(&port->bc_work); |
a35e2c1b | 849 | dev->priv_flags &= ~IFF_MACVLAN_PORT; |
ab95bfe0 | 850 | netdev_rx_handler_unregister(dev); |
6e070aec | 851 | kfree_rcu(port, rcu); |
b863ceb7 PM |
852 | } |
853 | ||
b863ceb7 PM |
854 | static int macvlan_validate(struct nlattr *tb[], struct nlattr *data[]) |
855 | { | |
856 | if (tb[IFLA_ADDRESS]) { | |
857 | if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) | |
858 | return -EINVAL; | |
859 | if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) | |
860 | return -EADDRNOTAVAIL; | |
861 | } | |
27c0b1a8 | 862 | |
15127478 MT |
863 | if (data && data[IFLA_MACVLAN_FLAGS] && |
864 | nla_get_u16(data[IFLA_MACVLAN_FLAGS]) & ~MACVLAN_FLAG_NOPROMISC) | |
865 | return -EINVAL; | |
866 | ||
27c0b1a8 AB |
867 | if (data && data[IFLA_MACVLAN_MODE]) { |
868 | switch (nla_get_u32(data[IFLA_MACVLAN_MODE])) { | |
869 | case MACVLAN_MODE_PRIVATE: | |
870 | case MACVLAN_MODE_VEPA: | |
871 | case MACVLAN_MODE_BRIDGE: | |
eb06acdc | 872 | case MACVLAN_MODE_PASSTHRU: |
27c0b1a8 AB |
873 | break; |
874 | default: | |
875 | return -EINVAL; | |
876 | } | |
877 | } | |
b863ceb7 PM |
878 | return 0; |
879 | } | |
880 | ||
fc0663d6 | 881 | int macvlan_common_newlink(struct net *src_net, struct net_device *dev, |
2f6a1b66 | 882 | struct nlattr *tb[], struct nlattr *data[]) |
b863ceb7 PM |
883 | { |
884 | struct macvlan_dev *vlan = netdev_priv(dev); | |
885 | struct macvlan_port *port; | |
886 | struct net_device *lowerdev; | |
887 | int err; | |
888 | ||
889 | if (!tb[IFLA_LINK]) | |
890 | return -EINVAL; | |
891 | ||
81adee47 | 892 | lowerdev = __dev_get_by_index(src_net, nla_get_u32(tb[IFLA_LINK])); |
b863ceb7 PM |
893 | if (lowerdev == NULL) |
894 | return -ENODEV; | |
895 | ||
d70f2cf5 | 896 | /* When creating macvlans or macvtaps on top of other macvlans - use |
b0832a29 | 897 | * the real device as the lowerdev. |
a6ca5f1d | 898 | */ |
d70f2cf5 KW |
899 | if (netif_is_macvlan(lowerdev)) |
900 | lowerdev = macvlan_dev_real_dev(lowerdev); | |
a6ca5f1d | 901 | |
b863ceb7 PM |
902 | if (!tb[IFLA_MTU]) |
903 | dev->mtu = lowerdev->mtu; | |
904 | else if (dev->mtu > lowerdev->mtu) | |
905 | return -EINVAL; | |
906 | ||
907 | if (!tb[IFLA_ADDRESS]) | |
7ce5d222 | 908 | eth_hw_addr_random(dev); |
b863ceb7 | 909 | |
a35e2c1b | 910 | if (!macvlan_port_exists(lowerdev)) { |
b863ceb7 PM |
911 | err = macvlan_port_create(lowerdev); |
912 | if (err < 0) | |
913 | return err; | |
914 | } | |
e052f7e6 | 915 | port = macvlan_port_get_rtnl(lowerdev); |
b863ceb7 | 916 | |
eb06acdc SS |
917 | /* Only 1 macvlan device can be created in passthru mode */ |
918 | if (port->passthru) | |
919 | return -EINVAL; | |
920 | ||
b863ceb7 PM |
921 | vlan->lowerdev = lowerdev; |
922 | vlan->dev = dev; | |
923 | vlan->port = port; | |
2be5c767 | 924 | vlan->set_features = MACVLAN_FEATURES; |
b863ceb7 | 925 | |
27c0b1a8 AB |
926 | vlan->mode = MACVLAN_MODE_VEPA; |
927 | if (data && data[IFLA_MACVLAN_MODE]) | |
928 | vlan->mode = nla_get_u32(data[IFLA_MACVLAN_MODE]); | |
929 | ||
df8ef8f3 JF |
930 | if (data && data[IFLA_MACVLAN_FLAGS]) |
931 | vlan->flags = nla_get_u16(data[IFLA_MACVLAN_FLAGS]); | |
932 | ||
eb06acdc | 933 | if (vlan->mode == MACVLAN_MODE_PASSTHRU) { |
d5cd9244 | 934 | if (port->count) |
eb06acdc SS |
935 | return -EINVAL; |
936 | port->passthru = true; | |
8b98604e | 937 | eth_hw_addr_inherit(dev, lowerdev); |
eb06acdc SS |
938 | } |
939 | ||
47d4ab91 JF |
940 | port->count += 1; |
941 | err = register_netdevice(dev); | |
942 | if (err < 0) | |
943 | goto destroy_port; | |
944 | ||
a6cc0cfa | 945 | dev->priv_flags |= IFF_MACVLAN; |
7cd43db7 JP |
946 | err = netdev_upper_dev_link(lowerdev, dev); |
947 | if (err) | |
da37705c | 948 | goto unregister_netdev; |
b863ceb7 | 949 | |
233c7df0 | 950 | list_add_tail_rcu(&vlan->list, &port->vlans); |
fc4a7489 | 951 | netif_stacked_transfer_operstate(lowerdev, dev); |
f16d3d57 | 952 | |
b863ceb7 | 953 | return 0; |
f16d3d57 | 954 | |
da37705c CW |
955 | unregister_netdev: |
956 | unregister_netdevice(dev); | |
f16d3d57 | 957 | destroy_port: |
d5cd9244 EB |
958 | port->count -= 1; |
959 | if (!port->count) | |
f16d3d57 JP |
960 | macvlan_port_destroy(lowerdev); |
961 | ||
962 | return err; | |
b863ceb7 | 963 | } |
fc0663d6 | 964 | EXPORT_SYMBOL_GPL(macvlan_common_newlink); |
b863ceb7 | 965 | |
fc0663d6 AB |
966 | static int macvlan_newlink(struct net *src_net, struct net_device *dev, |
967 | struct nlattr *tb[], struct nlattr *data[]) | |
968 | { | |
2f6a1b66 | 969 | return macvlan_common_newlink(src_net, dev, tb, data); |
fc0663d6 AB |
970 | } |
971 | ||
972 | void macvlan_dellink(struct net_device *dev, struct list_head *head) | |
b863ceb7 PM |
973 | { |
974 | struct macvlan_dev *vlan = netdev_priv(dev); | |
b863ceb7 | 975 | |
233c7df0 | 976 | list_del_rcu(&vlan->list); |
23289a37 | 977 | unregister_netdevice_queue(dev, head); |
7cd43db7 | 978 | netdev_upper_dev_unlink(vlan->lowerdev, dev); |
b863ceb7 | 979 | } |
fc0663d6 | 980 | EXPORT_SYMBOL_GPL(macvlan_dellink); |
b863ceb7 | 981 | |
27c0b1a8 AB |
982 | static int macvlan_changelink(struct net_device *dev, |
983 | struct nlattr *tb[], struct nlattr *data[]) | |
984 | { | |
985 | struct macvlan_dev *vlan = netdev_priv(dev); | |
266e8347 MT |
986 | enum macvlan_mode mode; |
987 | bool set_mode = false; | |
988 | ||
989 | /* Validate mode, but don't set yet: setting flags may fail. */ | |
990 | if (data && data[IFLA_MACVLAN_MODE]) { | |
991 | set_mode = true; | |
992 | mode = nla_get_u32(data[IFLA_MACVLAN_MODE]); | |
993 | /* Passthrough mode can't be set or cleared dynamically */ | |
994 | if ((mode == MACVLAN_MODE_PASSTHRU) != | |
995 | (vlan->mode == MACVLAN_MODE_PASSTHRU)) | |
996 | return -EINVAL; | |
997 | } | |
99ffc3e7 | 998 | |
df8ef8f3 JF |
999 | if (data && data[IFLA_MACVLAN_FLAGS]) { |
1000 | __u16 flags = nla_get_u16(data[IFLA_MACVLAN_FLAGS]); | |
1001 | bool promisc = (flags ^ vlan->flags) & MACVLAN_FLAG_NOPROMISC; | |
99ffc3e7 MT |
1002 | if (vlan->port->passthru && promisc) { |
1003 | int err; | |
1004 | ||
1005 | if (flags & MACVLAN_FLAG_NOPROMISC) | |
1006 | err = dev_set_promiscuity(vlan->lowerdev, -1); | |
1007 | else | |
1008 | err = dev_set_promiscuity(vlan->lowerdev, 1); | |
1009 | if (err < 0) | |
1010 | return err; | |
1011 | } | |
df8ef8f3 JF |
1012 | vlan->flags = flags; |
1013 | } | |
266e8347 MT |
1014 | if (set_mode) |
1015 | vlan->mode = mode; | |
27c0b1a8 AB |
1016 | return 0; |
1017 | } | |
1018 | ||
1019 | static size_t macvlan_get_size(const struct net_device *dev) | |
1020 | { | |
01fe944f ED |
1021 | return (0 |
1022 | + nla_total_size(4) /* IFLA_MACVLAN_MODE */ | |
1023 | + nla_total_size(2) /* IFLA_MACVLAN_FLAGS */ | |
1024 | ); | |
27c0b1a8 AB |
1025 | } |
1026 | ||
1027 | static int macvlan_fill_info(struct sk_buff *skb, | |
1028 | const struct net_device *dev) | |
1029 | { | |
1030 | struct macvlan_dev *vlan = netdev_priv(dev); | |
1031 | ||
ead9a76c DM |
1032 | if (nla_put_u32(skb, IFLA_MACVLAN_MODE, vlan->mode)) |
1033 | goto nla_put_failure; | |
df8ef8f3 JF |
1034 | if (nla_put_u16(skb, IFLA_MACVLAN_FLAGS, vlan->flags)) |
1035 | goto nla_put_failure; | |
27c0b1a8 AB |
1036 | return 0; |
1037 | ||
1038 | nla_put_failure: | |
1039 | return -EMSGSIZE; | |
1040 | } | |
1041 | ||
1042 | static const struct nla_policy macvlan_policy[IFLA_MACVLAN_MAX + 1] = { | |
df8ef8f3 JF |
1043 | [IFLA_MACVLAN_MODE] = { .type = NLA_U32 }, |
1044 | [IFLA_MACVLAN_FLAGS] = { .type = NLA_U16 }, | |
27c0b1a8 AB |
1045 | }; |
1046 | ||
fc0663d6 AB |
1047 | int macvlan_link_register(struct rtnl_link_ops *ops) |
1048 | { | |
1049 | /* common fields */ | |
1050 | ops->priv_size = sizeof(struct macvlan_dev); | |
fc0663d6 AB |
1051 | ops->validate = macvlan_validate; |
1052 | ops->maxtype = IFLA_MACVLAN_MAX; | |
1053 | ops->policy = macvlan_policy; | |
1054 | ops->changelink = macvlan_changelink; | |
1055 | ops->get_size = macvlan_get_size; | |
1056 | ops->fill_info = macvlan_fill_info; | |
1057 | ||
1058 | return rtnl_link_register(ops); | |
1059 | }; | |
1060 | EXPORT_SYMBOL_GPL(macvlan_link_register); | |
1061 | ||
1062 | static struct rtnl_link_ops macvlan_link_ops = { | |
b863ceb7 | 1063 | .kind = "macvlan", |
8a35747a | 1064 | .setup = macvlan_setup, |
b863ceb7 PM |
1065 | .newlink = macvlan_newlink, |
1066 | .dellink = macvlan_dellink, | |
1067 | }; | |
1068 | ||
1069 | static int macvlan_device_event(struct notifier_block *unused, | |
1070 | unsigned long event, void *ptr) | |
1071 | { | |
351638e7 | 1072 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); |
b863ceb7 PM |
1073 | struct macvlan_dev *vlan, *next; |
1074 | struct macvlan_port *port; | |
226bd341 | 1075 | LIST_HEAD(list_kill); |
b863ceb7 | 1076 | |
a35e2c1b | 1077 | if (!macvlan_port_exists(dev)) |
b863ceb7 PM |
1078 | return NOTIFY_DONE; |
1079 | ||
e052f7e6 | 1080 | port = macvlan_port_get_rtnl(dev); |
a35e2c1b | 1081 | |
b863ceb7 PM |
1082 | switch (event) { |
1083 | case NETDEV_CHANGE: | |
1084 | list_for_each_entry(vlan, &port->vlans, list) | |
fc4a7489 PM |
1085 | netif_stacked_transfer_operstate(vlan->lowerdev, |
1086 | vlan->dev); | |
b863ceb7 PM |
1087 | break; |
1088 | case NETDEV_FEAT_CHANGE: | |
1089 | list_for_each_entry(vlan, &port->vlans, list) { | |
8c2acc53 | 1090 | vlan->dev->gso_max_size = dev->gso_max_size; |
797f87f8 | 1091 | netdev_update_features(vlan->dev); |
b863ceb7 PM |
1092 | } |
1093 | break; | |
1094 | case NETDEV_UNREGISTER: | |
3b27e105 DL |
1095 | /* twiddle thumbs on netns device moves */ |
1096 | if (dev->reg_state != NETREG_UNREGISTERING) | |
1097 | break; | |
1098 | ||
b863ceb7 | 1099 | list_for_each_entry_safe(vlan, next, &port->vlans, list) |
226bd341 ED |
1100 | vlan->dev->rtnl_link_ops->dellink(vlan->dev, &list_kill); |
1101 | unregister_netdevice_many(&list_kill); | |
1102 | list_del(&list_kill); | |
b863ceb7 | 1103 | break; |
1c01fe14 JP |
1104 | case NETDEV_PRE_TYPE_CHANGE: |
1105 | /* Forbid underlaying device to change its type. */ | |
1106 | return NOTIFY_BAD; | |
b863ceb7 PM |
1107 | } |
1108 | return NOTIFY_DONE; | |
1109 | } | |
1110 | ||
1111 | static struct notifier_block macvlan_notifier_block __read_mostly = { | |
1112 | .notifier_call = macvlan_device_event, | |
1113 | }; | |
1114 | ||
1115 | static int __init macvlan_init_module(void) | |
1116 | { | |
1117 | int err; | |
1118 | ||
1119 | register_netdevice_notifier(&macvlan_notifier_block); | |
b863ceb7 | 1120 | |
fc0663d6 | 1121 | err = macvlan_link_register(&macvlan_link_ops); |
b863ceb7 PM |
1122 | if (err < 0) |
1123 | goto err1; | |
1124 | return 0; | |
1125 | err1: | |
b863ceb7 PM |
1126 | unregister_netdevice_notifier(&macvlan_notifier_block); |
1127 | return err; | |
1128 | } | |
1129 | ||
1130 | static void __exit macvlan_cleanup_module(void) | |
1131 | { | |
1132 | rtnl_link_unregister(&macvlan_link_ops); | |
b863ceb7 PM |
1133 | unregister_netdevice_notifier(&macvlan_notifier_block); |
1134 | } | |
1135 | ||
1136 | module_init(macvlan_init_module); | |
1137 | module_exit(macvlan_cleanup_module); | |
1138 | ||
1139 | MODULE_LICENSE("GPL"); | |
1140 | MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>"); | |
1141 | MODULE_DESCRIPTION("Driver for MAC address based VLANs"); | |
1142 | MODULE_ALIAS_RTNL_LINK("macvlan"); |