Commit | Line | Data |
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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> |
b863ceb7 | 33 | #include <net/rtnetlink.h> |
618e1b74 | 34 | #include <net/xfrm.h> |
b863ceb7 PM |
35 | |
36 | #define MACVLAN_HASH_SIZE (1 << BITS_PER_BYTE) | |
37 | ||
38 | struct macvlan_port { | |
39 | struct net_device *dev; | |
40 | struct hlist_head vlan_hash[MACVLAN_HASH_SIZE]; | |
41 | struct list_head vlans; | |
8b37ef0a | 42 | struct rcu_head rcu; |
eb06acdc | 43 | bool passthru; |
d5cd9244 | 44 | int count; |
b863ceb7 PM |
45 | }; |
46 | ||
d5cd9244 EB |
47 | static void macvlan_port_destroy(struct net_device *dev); |
48 | ||
a35e2c1b JP |
49 | #define macvlan_port_get_rcu(dev) \ |
50 | ((struct macvlan_port *) rcu_dereference(dev->rx_handler_data)) | |
51 | #define macvlan_port_get(dev) ((struct macvlan_port *) dev->rx_handler_data) | |
52 | #define macvlan_port_exists(dev) (dev->priv_flags & IFF_MACVLAN_PORT) | |
53 | ||
b863ceb7 PM |
54 | static struct macvlan_dev *macvlan_hash_lookup(const struct macvlan_port *port, |
55 | const unsigned char *addr) | |
56 | { | |
57 | struct macvlan_dev *vlan; | |
58 | struct hlist_node *n; | |
59 | ||
60 | hlist_for_each_entry_rcu(vlan, n, &port->vlan_hash[addr[5]], hlist) { | |
a6700db1 | 61 | if (ether_addr_equal_64bits(vlan->dev->dev_addr, addr)) |
b863ceb7 PM |
62 | return vlan; |
63 | } | |
64 | return NULL; | |
65 | } | |
66 | ||
f9ac30f0 EB |
67 | static void macvlan_hash_add(struct macvlan_dev *vlan) |
68 | { | |
69 | struct macvlan_port *port = vlan->port; | |
70 | const unsigned char *addr = vlan->dev->dev_addr; | |
71 | ||
72 | hlist_add_head_rcu(&vlan->hlist, &port->vlan_hash[addr[5]]); | |
73 | } | |
74 | ||
449f4544 | 75 | static void macvlan_hash_del(struct macvlan_dev *vlan, bool sync) |
f9ac30f0 EB |
76 | { |
77 | hlist_del_rcu(&vlan->hlist); | |
449f4544 ED |
78 | if (sync) |
79 | synchronize_rcu(); | |
f9ac30f0 EB |
80 | } |
81 | ||
82 | static void macvlan_hash_change_addr(struct macvlan_dev *vlan, | |
83 | const unsigned char *addr) | |
84 | { | |
449f4544 | 85 | macvlan_hash_del(vlan, true); |
f9ac30f0 EB |
86 | /* Now that we are unhashed it is safe to change the device |
87 | * address without confusing packet delivery. | |
88 | */ | |
89 | memcpy(vlan->dev->dev_addr, addr, ETH_ALEN); | |
90 | macvlan_hash_add(vlan); | |
91 | } | |
92 | ||
93 | static int macvlan_addr_busy(const struct macvlan_port *port, | |
94 | const unsigned char *addr) | |
95 | { | |
96 | /* Test to see if the specified multicast address is | |
97 | * currently in use by the underlying device or | |
98 | * another macvlan. | |
99 | */ | |
a6700db1 | 100 | if (ether_addr_equal_64bits(port->dev->dev_addr, addr)) |
f9ac30f0 EB |
101 | return 1; |
102 | ||
103 | if (macvlan_hash_lookup(port, addr)) | |
104 | return 1; | |
105 | ||
106 | return 0; | |
107 | } | |
108 | ||
a1e514c5 | 109 | |
fc0663d6 AB |
110 | static int macvlan_broadcast_one(struct sk_buff *skb, |
111 | const struct macvlan_dev *vlan, | |
618e1b74 | 112 | const struct ethhdr *eth, bool local) |
a1e514c5 | 113 | { |
fc0663d6 | 114 | struct net_device *dev = vlan->dev; |
a1e514c5 AB |
115 | if (!skb) |
116 | return NET_RX_DROP; | |
117 | ||
618e1b74 | 118 | if (local) |
fc0663d6 | 119 | return vlan->forward(dev, skb); |
618e1b74 | 120 | |
a1e514c5 | 121 | skb->dev = dev; |
a6700db1 | 122 | if (ether_addr_equal_64bits(eth->h_dest, dev->broadcast)) |
a1e514c5 AB |
123 | skb->pkt_type = PACKET_BROADCAST; |
124 | else | |
125 | skb->pkt_type = PACKET_MULTICAST; | |
126 | ||
fc0663d6 | 127 | return vlan->receive(skb); |
a1e514c5 AB |
128 | } |
129 | ||
cd431e73 ED |
130 | static unsigned int mc_hash(const unsigned char *addr) |
131 | { | |
132 | u32 val = __get_unaligned_cpu32(addr + 2); | |
133 | ||
134 | return hash_32(val, MACVLAN_MC_FILTER_BITS); | |
135 | } | |
136 | ||
b863ceb7 | 137 | static void macvlan_broadcast(struct sk_buff *skb, |
618e1b74 AB |
138 | const struct macvlan_port *port, |
139 | struct net_device *src, | |
140 | enum macvlan_mode mode) | |
b863ceb7 PM |
141 | { |
142 | const struct ethhdr *eth = eth_hdr(skb); | |
143 | const struct macvlan_dev *vlan; | |
144 | struct hlist_node *n; | |
b863ceb7 PM |
145 | struct sk_buff *nskb; |
146 | unsigned int i; | |
a1e514c5 | 147 | int err; |
cd431e73 | 148 | unsigned int hash = mc_hash(eth->h_dest); |
b863ceb7 | 149 | |
efbbced3 PM |
150 | if (skb->protocol == htons(ETH_P_PAUSE)) |
151 | return; | |
152 | ||
b863ceb7 PM |
153 | for (i = 0; i < MACVLAN_HASH_SIZE; i++) { |
154 | hlist_for_each_entry_rcu(vlan, n, &port->vlan_hash[i], hlist) { | |
618e1b74 AB |
155 | if (vlan->dev == src || !(vlan->mode & mode)) |
156 | continue; | |
157 | ||
cd431e73 ED |
158 | if (!test_bit(hash, vlan->mc_filter)) |
159 | continue; | |
b863ceb7 | 160 | nskb = skb_clone(skb, GFP_ATOMIC); |
fc0663d6 | 161 | err = macvlan_broadcast_one(nskb, vlan, eth, |
618e1b74 | 162 | mode == MACVLAN_MODE_BRIDGE); |
a1e514c5 AB |
163 | macvlan_count_rx(vlan, skb->len + ETH_HLEN, |
164 | err == NET_RX_SUCCESS, 1); | |
b863ceb7 PM |
165 | } |
166 | } | |
167 | } | |
168 | ||
169 | /* called under rcu_read_lock() from netif_receive_skb */ | |
8a4eb573 | 170 | static rx_handler_result_t macvlan_handle_frame(struct sk_buff **pskb) |
b863ceb7 | 171 | { |
ab95bfe0 | 172 | struct macvlan_port *port; |
8a4eb573 | 173 | struct sk_buff *skb = *pskb; |
b863ceb7 | 174 | const struct ethhdr *eth = eth_hdr(skb); |
b863ceb7 | 175 | const struct macvlan_dev *vlan; |
618e1b74 | 176 | const struct macvlan_dev *src; |
b863ceb7 | 177 | struct net_device *dev; |
ba01877f SS |
178 | unsigned int len = 0; |
179 | int ret = NET_RX_DROP; | |
b863ceb7 | 180 | |
a35e2c1b | 181 | port = macvlan_port_get_rcu(skb->dev); |
b863ceb7 | 182 | if (is_multicast_ether_addr(eth->h_dest)) { |
bc416d97 ED |
183 | skb = ip_check_defrag(skb, IP_DEFRAG_MACVLAN); |
184 | if (!skb) | |
185 | return RX_HANDLER_CONSUMED; | |
4ec7ac12 | 186 | eth = eth_hdr(skb); |
618e1b74 AB |
187 | src = macvlan_hash_lookup(port, eth->h_source); |
188 | if (!src) | |
189 | /* frame comes from an external address */ | |
190 | macvlan_broadcast(skb, port, NULL, | |
191 | MACVLAN_MODE_PRIVATE | | |
192 | MACVLAN_MODE_VEPA | | |
eb06acdc | 193 | MACVLAN_MODE_PASSTHRU| |
618e1b74 AB |
194 | MACVLAN_MODE_BRIDGE); |
195 | else if (src->mode == MACVLAN_MODE_VEPA) | |
196 | /* flood to everyone except source */ | |
197 | macvlan_broadcast(skb, port, src->dev, | |
198 | MACVLAN_MODE_VEPA | | |
199 | MACVLAN_MODE_BRIDGE); | |
200 | else if (src->mode == MACVLAN_MODE_BRIDGE) | |
201 | /* | |
202 | * flood only to VEPA ports, bridge ports | |
203 | * already saw the frame on the way out. | |
204 | */ | |
205 | macvlan_broadcast(skb, port, src->dev, | |
206 | MACVLAN_MODE_VEPA); | |
729e72a1 | 207 | else { |
208 | /* forward to original port. */ | |
209 | vlan = src; | |
210 | ret = macvlan_broadcast_one(skb, vlan, eth, 0); | |
211 | goto out; | |
212 | } | |
213 | ||
8a4eb573 | 214 | return RX_HANDLER_PASS; |
b863ceb7 PM |
215 | } |
216 | ||
eb06acdc SS |
217 | if (port->passthru) |
218 | vlan = list_first_entry(&port->vlans, struct macvlan_dev, list); | |
219 | else | |
220 | vlan = macvlan_hash_lookup(port, eth->h_dest); | |
b863ceb7 | 221 | if (vlan == NULL) |
8a4eb573 | 222 | return RX_HANDLER_PASS; |
b863ceb7 PM |
223 | |
224 | dev = vlan->dev; | |
225 | if (unlikely(!(dev->flags & IFF_UP))) { | |
226 | kfree_skb(skb); | |
8a4eb573 | 227 | return RX_HANDLER_CONSUMED; |
b863ceb7 | 228 | } |
a1e514c5 | 229 | len = skb->len + ETH_HLEN; |
b863ceb7 | 230 | skb = skb_share_check(skb, GFP_ATOMIC); |
a1e514c5 | 231 | if (!skb) |
ba01877f | 232 | goto out; |
b863ceb7 PM |
233 | |
234 | skb->dev = dev; | |
235 | skb->pkt_type = PACKET_HOST; | |
236 | ||
ba01877f SS |
237 | ret = vlan->receive(skb); |
238 | ||
239 | out: | |
240 | macvlan_count_rx(vlan, len, ret == NET_RX_SUCCESS, 0); | |
8a4eb573 | 241 | return RX_HANDLER_CONSUMED; |
b863ceb7 PM |
242 | } |
243 | ||
618e1b74 AB |
244 | static int macvlan_queue_xmit(struct sk_buff *skb, struct net_device *dev) |
245 | { | |
246 | const struct macvlan_dev *vlan = netdev_priv(dev); | |
247 | const struct macvlan_port *port = vlan->port; | |
248 | const struct macvlan_dev *dest; | |
12a2856b | 249 | __u8 ip_summed = skb->ip_summed; |
618e1b74 AB |
250 | |
251 | if (vlan->mode == MACVLAN_MODE_BRIDGE) { | |
252 | const struct ethhdr *eth = (void *)skb->data; | |
12a2856b | 253 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
618e1b74 AB |
254 | |
255 | /* send to other bridge ports directly */ | |
256 | if (is_multicast_ether_addr(eth->h_dest)) { | |
257 | macvlan_broadcast(skb, port, dev, MACVLAN_MODE_BRIDGE); | |
258 | goto xmit_world; | |
259 | } | |
260 | ||
261 | dest = macvlan_hash_lookup(port, eth->h_dest); | |
262 | if (dest && dest->mode == MACVLAN_MODE_BRIDGE) { | |
a37dd333 | 263 | /* send to lowerdev first for its network taps */ |
cb2d0f3e | 264 | dev_forward_skb(vlan->lowerdev, skb); |
618e1b74 AB |
265 | |
266 | return NET_XMIT_SUCCESS; | |
267 | } | |
268 | } | |
269 | ||
270 | xmit_world: | |
12a2856b | 271 | skb->ip_summed = ip_summed; |
59b9997b | 272 | skb->dev = vlan->lowerdev; |
618e1b74 AB |
273 | return dev_queue_xmit(skb); |
274 | } | |
275 | ||
fc0663d6 AB |
276 | netdev_tx_t macvlan_start_xmit(struct sk_buff *skb, |
277 | struct net_device *dev) | |
b863ceb7 | 278 | { |
b863ceb7 PM |
279 | unsigned int len = skb->len; |
280 | int ret; | |
8ffab51b | 281 | const struct macvlan_dev *vlan = netdev_priv(dev); |
b863ceb7 | 282 | |
618e1b74 | 283 | ret = macvlan_queue_xmit(skb, dev); |
2d6c9ffc | 284 | if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) { |
8ffab51b | 285 | struct macvlan_pcpu_stats *pcpu_stats; |
2c114553 | 286 | |
8ffab51b ED |
287 | pcpu_stats = this_cpu_ptr(vlan->pcpu_stats); |
288 | u64_stats_update_begin(&pcpu_stats->syncp); | |
289 | pcpu_stats->tx_packets++; | |
290 | pcpu_stats->tx_bytes += len; | |
291 | u64_stats_update_end(&pcpu_stats->syncp); | |
292 | } else { | |
293 | this_cpu_inc(vlan->pcpu_stats->tx_dropped); | |
294 | } | |
cbbef5e1 | 295 | return ret; |
b863ceb7 | 296 | } |
fc0663d6 | 297 | EXPORT_SYMBOL_GPL(macvlan_start_xmit); |
b863ceb7 PM |
298 | |
299 | static int macvlan_hard_header(struct sk_buff *skb, struct net_device *dev, | |
3b04ddde SH |
300 | unsigned short type, const void *daddr, |
301 | const void *saddr, unsigned len) | |
b863ceb7 PM |
302 | { |
303 | const struct macvlan_dev *vlan = netdev_priv(dev); | |
304 | struct net_device *lowerdev = vlan->lowerdev; | |
305 | ||
0c4e8581 SH |
306 | return dev_hard_header(skb, lowerdev, type, daddr, |
307 | saddr ? : dev->dev_addr, len); | |
b863ceb7 PM |
308 | } |
309 | ||
3b04ddde SH |
310 | static const struct header_ops macvlan_hard_header_ops = { |
311 | .create = macvlan_hard_header, | |
312 | .rebuild = eth_rebuild_header, | |
313 | .parse = eth_header_parse, | |
3b04ddde SH |
314 | .cache = eth_header_cache, |
315 | .cache_update = eth_header_cache_update, | |
316 | }; | |
317 | ||
b863ceb7 PM |
318 | static int macvlan_open(struct net_device *dev) |
319 | { | |
320 | struct macvlan_dev *vlan = netdev_priv(dev); | |
b863ceb7 PM |
321 | struct net_device *lowerdev = vlan->lowerdev; |
322 | int err; | |
323 | ||
eb06acdc | 324 | if (vlan->port->passthru) { |
df8ef8f3 JF |
325 | if (!(vlan->flags & MACVLAN_FLAG_NOPROMISC)) |
326 | dev_set_promiscuity(lowerdev, 1); | |
eb06acdc SS |
327 | goto hash_add; |
328 | } | |
329 | ||
f9ac30f0 EB |
330 | err = -EBUSY; |
331 | if (macvlan_addr_busy(vlan->port, dev->dev_addr)) | |
332 | goto out; | |
333 | ||
a748ee24 | 334 | err = dev_uc_add(lowerdev, dev->dev_addr); |
b863ceb7 | 335 | if (err < 0) |
b89fb7da WC |
336 | goto out; |
337 | if (dev->flags & IFF_ALLMULTI) { | |
338 | err = dev_set_allmulti(lowerdev, 1); | |
339 | if (err < 0) | |
340 | goto del_unicast; | |
341 | } | |
eb06acdc SS |
342 | |
343 | hash_add: | |
f9ac30f0 | 344 | macvlan_hash_add(vlan); |
b863ceb7 | 345 | return 0; |
b89fb7da WC |
346 | |
347 | del_unicast: | |
a748ee24 | 348 | dev_uc_del(lowerdev, dev->dev_addr); |
b89fb7da WC |
349 | out: |
350 | return err; | |
b863ceb7 PM |
351 | } |
352 | ||
353 | static int macvlan_stop(struct net_device *dev) | |
354 | { | |
355 | struct macvlan_dev *vlan = netdev_priv(dev); | |
356 | struct net_device *lowerdev = vlan->lowerdev; | |
357 | ||
df8ef8f3 JF |
358 | dev_uc_unsync(lowerdev, dev); |
359 | dev_mc_unsync(lowerdev, dev); | |
360 | ||
eb06acdc | 361 | if (vlan->port->passthru) { |
df8ef8f3 JF |
362 | if (!(vlan->flags & MACVLAN_FLAG_NOPROMISC)) |
363 | dev_set_promiscuity(lowerdev, -1); | |
eb06acdc SS |
364 | goto hash_del; |
365 | } | |
366 | ||
b863ceb7 PM |
367 | if (dev->flags & IFF_ALLMULTI) |
368 | dev_set_allmulti(lowerdev, -1); | |
369 | ||
a748ee24 | 370 | dev_uc_del(lowerdev, dev->dev_addr); |
b863ceb7 | 371 | |
eb06acdc | 372 | hash_del: |
449f4544 | 373 | macvlan_hash_del(vlan, !dev->dismantle); |
b863ceb7 PM |
374 | return 0; |
375 | } | |
376 | ||
ad5d20a6 PM |
377 | static int macvlan_set_mac_address(struct net_device *dev, void *p) |
378 | { | |
379 | struct macvlan_dev *vlan = netdev_priv(dev); | |
380 | struct net_device *lowerdev = vlan->lowerdev; | |
381 | struct sockaddr *addr = p; | |
382 | int err; | |
383 | ||
384 | if (!is_valid_ether_addr(addr->sa_data)) | |
385 | return -EADDRNOTAVAIL; | |
386 | ||
f9ac30f0 EB |
387 | if (!(dev->flags & IFF_UP)) { |
388 | /* Just copy in the new address */ | |
389 | memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN); | |
390 | } else { | |
391 | /* Rehash and update the device filters */ | |
392 | if (macvlan_addr_busy(vlan->port, addr->sa_data)) | |
393 | return -EBUSY; | |
ad5d20a6 | 394 | |
a748ee24 | 395 | err = dev_uc_add(lowerdev, addr->sa_data); |
ccffad25 | 396 | if (err) |
f9ac30f0 | 397 | return err; |
ad5d20a6 | 398 | |
a748ee24 | 399 | dev_uc_del(lowerdev, dev->dev_addr); |
f9ac30f0 EB |
400 | |
401 | macvlan_hash_change_addr(vlan, addr->sa_data); | |
402 | } | |
ad5d20a6 PM |
403 | return 0; |
404 | } | |
405 | ||
b863ceb7 PM |
406 | static void macvlan_change_rx_flags(struct net_device *dev, int change) |
407 | { | |
408 | struct macvlan_dev *vlan = netdev_priv(dev); | |
409 | struct net_device *lowerdev = vlan->lowerdev; | |
410 | ||
411 | if (change & IFF_ALLMULTI) | |
412 | dev_set_allmulti(lowerdev, dev->flags & IFF_ALLMULTI ? 1 : -1); | |
413 | } | |
414 | ||
df8ef8f3 | 415 | static void macvlan_set_mac_lists(struct net_device *dev) |
b863ceb7 PM |
416 | { |
417 | struct macvlan_dev *vlan = netdev_priv(dev); | |
418 | ||
cd431e73 ED |
419 | if (dev->flags & (IFF_PROMISC | IFF_ALLMULTI)) { |
420 | bitmap_fill(vlan->mc_filter, MACVLAN_MC_FILTER_SZ); | |
421 | } else { | |
422 | struct netdev_hw_addr *ha; | |
423 | DECLARE_BITMAP(filter, MACVLAN_MC_FILTER_SZ); | |
424 | ||
425 | bitmap_zero(filter, MACVLAN_MC_FILTER_SZ); | |
426 | netdev_for_each_mc_addr(ha, dev) { | |
427 | __set_bit(mc_hash(ha->addr), filter); | |
428 | } | |
429 | bitmap_copy(vlan->mc_filter, filter, MACVLAN_MC_FILTER_SZ); | |
430 | } | |
df8ef8f3 | 431 | dev_uc_sync(vlan->lowerdev, dev); |
b863ceb7 PM |
432 | dev_mc_sync(vlan->lowerdev, dev); |
433 | } | |
434 | ||
435 | static int macvlan_change_mtu(struct net_device *dev, int new_mtu) | |
436 | { | |
437 | struct macvlan_dev *vlan = netdev_priv(dev); | |
438 | ||
439 | if (new_mtu < 68 || vlan->lowerdev->mtu < new_mtu) | |
440 | return -EINVAL; | |
441 | dev->mtu = new_mtu; | |
442 | return 0; | |
443 | } | |
444 | ||
445 | /* | |
446 | * macvlan network devices have devices nesting below it and are a special | |
447 | * "super class" of normal network devices; split their locks off into a | |
448 | * separate class since they always nest. | |
449 | */ | |
450 | static struct lock_class_key macvlan_netdev_xmit_lock_key; | |
cf508b12 | 451 | static struct lock_class_key macvlan_netdev_addr_lock_key; |
b863ceb7 PM |
452 | |
453 | #define MACVLAN_FEATURES \ | |
454 | (NETIF_F_SG | NETIF_F_ALL_CSUM | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST | \ | |
455 | NETIF_F_GSO | NETIF_F_TSO | NETIF_F_UFO | NETIF_F_GSO_ROBUST | \ | |
8d13e670 JF |
456 | NETIF_F_TSO_ECN | NETIF_F_TSO6 | NETIF_F_GRO | NETIF_F_RXCSUM | \ |
457 | NETIF_F_HW_VLAN_FILTER) | |
b863ceb7 PM |
458 | |
459 | #define MACVLAN_STATE_MASK \ | |
460 | ((1<<__LINK_STATE_NOCARRIER) | (1<<__LINK_STATE_DORMANT)) | |
461 | ||
e8a0464c DM |
462 | static void macvlan_set_lockdep_class_one(struct net_device *dev, |
463 | struct netdev_queue *txq, | |
464 | void *_unused) | |
c773e847 DM |
465 | { |
466 | lockdep_set_class(&txq->_xmit_lock, | |
467 | &macvlan_netdev_xmit_lock_key); | |
468 | } | |
469 | ||
470 | static void macvlan_set_lockdep_class(struct net_device *dev) | |
471 | { | |
cf508b12 DM |
472 | lockdep_set_class(&dev->addr_list_lock, |
473 | &macvlan_netdev_addr_lock_key); | |
e8a0464c | 474 | netdev_for_each_tx_queue(dev, macvlan_set_lockdep_class_one, NULL); |
c773e847 DM |
475 | } |
476 | ||
b863ceb7 PM |
477 | static int macvlan_init(struct net_device *dev) |
478 | { | |
479 | struct macvlan_dev *vlan = netdev_priv(dev); | |
480 | const struct net_device *lowerdev = vlan->lowerdev; | |
481 | ||
482 | dev->state = (dev->state & ~MACVLAN_STATE_MASK) | | |
483 | (lowerdev->state & MACVLAN_STATE_MASK); | |
484 | dev->features = lowerdev->features & MACVLAN_FEATURES; | |
8ffab51b | 485 | dev->features |= NETIF_F_LLTX; |
8c2acc53 | 486 | dev->gso_max_size = lowerdev->gso_max_size; |
b863ceb7 | 487 | dev->iflink = lowerdev->ifindex; |
ef5c8996 | 488 | dev->hard_header_len = lowerdev->hard_header_len; |
b863ceb7 | 489 | |
c773e847 DM |
490 | macvlan_set_lockdep_class(dev); |
491 | ||
8ffab51b ED |
492 | vlan->pcpu_stats = alloc_percpu(struct macvlan_pcpu_stats); |
493 | if (!vlan->pcpu_stats) | |
fccaf710 ED |
494 | return -ENOMEM; |
495 | ||
b863ceb7 PM |
496 | return 0; |
497 | } | |
498 | ||
fccaf710 ED |
499 | static void macvlan_uninit(struct net_device *dev) |
500 | { | |
501 | struct macvlan_dev *vlan = netdev_priv(dev); | |
d5cd9244 | 502 | struct macvlan_port *port = vlan->port; |
fccaf710 | 503 | |
8ffab51b | 504 | free_percpu(vlan->pcpu_stats); |
d5cd9244 EB |
505 | |
506 | port->count -= 1; | |
507 | if (!port->count) | |
508 | macvlan_port_destroy(port->dev); | |
fccaf710 ED |
509 | } |
510 | ||
28172739 ED |
511 | static struct rtnl_link_stats64 *macvlan_dev_get_stats64(struct net_device *dev, |
512 | struct rtnl_link_stats64 *stats) | |
fccaf710 | 513 | { |
fccaf710 ED |
514 | struct macvlan_dev *vlan = netdev_priv(dev); |
515 | ||
8ffab51b ED |
516 | if (vlan->pcpu_stats) { |
517 | struct macvlan_pcpu_stats *p; | |
518 | u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes; | |
519 | u32 rx_errors = 0, tx_dropped = 0; | |
bc66154e | 520 | unsigned int start; |
fccaf710 ED |
521 | int i; |
522 | ||
523 | for_each_possible_cpu(i) { | |
8ffab51b | 524 | p = per_cpu_ptr(vlan->pcpu_stats, i); |
bc66154e ED |
525 | do { |
526 | start = u64_stats_fetch_begin_bh(&p->syncp); | |
527 | rx_packets = p->rx_packets; | |
528 | rx_bytes = p->rx_bytes; | |
529 | rx_multicast = p->rx_multicast; | |
8ffab51b ED |
530 | tx_packets = p->tx_packets; |
531 | tx_bytes = p->tx_bytes; | |
bc66154e | 532 | } while (u64_stats_fetch_retry_bh(&p->syncp, start)); |
8ffab51b ED |
533 | |
534 | stats->rx_packets += rx_packets; | |
535 | stats->rx_bytes += rx_bytes; | |
536 | stats->multicast += rx_multicast; | |
537 | stats->tx_packets += tx_packets; | |
538 | stats->tx_bytes += tx_bytes; | |
539 | /* rx_errors & tx_dropped are u32, updated | |
540 | * without syncp protection. | |
541 | */ | |
542 | rx_errors += p->rx_errors; | |
543 | tx_dropped += p->tx_dropped; | |
fccaf710 | 544 | } |
8ffab51b ED |
545 | stats->rx_errors = rx_errors; |
546 | stats->rx_dropped = rx_errors; | |
547 | stats->tx_dropped = tx_dropped; | |
fccaf710 ED |
548 | } |
549 | return stats; | |
550 | } | |
551 | ||
8e586137 | 552 | static int macvlan_vlan_rx_add_vid(struct net_device *dev, |
8d13e670 JF |
553 | unsigned short vid) |
554 | { | |
555 | struct macvlan_dev *vlan = netdev_priv(dev); | |
556 | struct net_device *lowerdev = vlan->lowerdev; | |
8d13e670 | 557 | |
87002b03 | 558 | return vlan_vid_add(lowerdev, vid); |
8d13e670 JF |
559 | } |
560 | ||
8e586137 | 561 | static int macvlan_vlan_rx_kill_vid(struct net_device *dev, |
8d13e670 JF |
562 | unsigned short vid) |
563 | { | |
564 | struct macvlan_dev *vlan = netdev_priv(dev); | |
565 | struct net_device *lowerdev = vlan->lowerdev; | |
8d13e670 | 566 | |
87002b03 | 567 | vlan_vid_del(lowerdev, vid); |
8e586137 | 568 | return 0; |
8d13e670 JF |
569 | } |
570 | ||
edc7d573 | 571 | static int macvlan_fdb_add(struct ndmsg *ndm, struct nlattr *tb[], |
df8ef8f3 | 572 | struct net_device *dev, |
6b6e2725 | 573 | const unsigned char *addr, |
df8ef8f3 JF |
574 | u16 flags) |
575 | { | |
576 | struct macvlan_dev *vlan = netdev_priv(dev); | |
577 | int err = -EINVAL; | |
578 | ||
579 | if (!vlan->port->passthru) | |
580 | return -EOPNOTSUPP; | |
581 | ||
582 | if (is_unicast_ether_addr(addr)) | |
583 | err = dev_uc_add_excl(dev, addr); | |
584 | else if (is_multicast_ether_addr(addr)) | |
585 | err = dev_mc_add_excl(dev, addr); | |
586 | ||
587 | return err; | |
588 | } | |
589 | ||
590 | static int macvlan_fdb_del(struct ndmsg *ndm, | |
591 | struct net_device *dev, | |
6b6e2725 | 592 | const unsigned char *addr) |
df8ef8f3 JF |
593 | { |
594 | struct macvlan_dev *vlan = netdev_priv(dev); | |
595 | int err = -EINVAL; | |
596 | ||
597 | if (!vlan->port->passthru) | |
598 | return -EOPNOTSUPP; | |
599 | ||
600 | if (is_unicast_ether_addr(addr)) | |
601 | err = dev_uc_del(dev, addr); | |
602 | else if (is_multicast_ether_addr(addr)) | |
603 | err = dev_mc_del(dev, addr); | |
604 | ||
605 | return err; | |
606 | } | |
607 | ||
b863ceb7 PM |
608 | static void macvlan_ethtool_get_drvinfo(struct net_device *dev, |
609 | struct ethtool_drvinfo *drvinfo) | |
610 | { | |
7826d43f JP |
611 | strlcpy(drvinfo->driver, "macvlan", sizeof(drvinfo->driver)); |
612 | strlcpy(drvinfo->version, "0.1", sizeof(drvinfo->version)); | |
b863ceb7 PM |
613 | } |
614 | ||
9edb8bb6 SH |
615 | static int macvlan_ethtool_get_settings(struct net_device *dev, |
616 | struct ethtool_cmd *cmd) | |
617 | { | |
618 | const struct macvlan_dev *vlan = netdev_priv(dev); | |
4bc71cb9 JP |
619 | |
620 | return __ethtool_get_settings(vlan->lowerdev, cmd); | |
9edb8bb6 SH |
621 | } |
622 | ||
b863ceb7 PM |
623 | static const struct ethtool_ops macvlan_ethtool_ops = { |
624 | .get_link = ethtool_op_get_link, | |
9edb8bb6 | 625 | .get_settings = macvlan_ethtool_get_settings, |
b863ceb7 PM |
626 | .get_drvinfo = macvlan_ethtool_get_drvinfo, |
627 | }; | |
628 | ||
54a30c97 SH |
629 | static const struct net_device_ops macvlan_netdev_ops = { |
630 | .ndo_init = macvlan_init, | |
fccaf710 | 631 | .ndo_uninit = macvlan_uninit, |
54a30c97 SH |
632 | .ndo_open = macvlan_open, |
633 | .ndo_stop = macvlan_stop, | |
00829823 | 634 | .ndo_start_xmit = macvlan_start_xmit, |
54a30c97 SH |
635 | .ndo_change_mtu = macvlan_change_mtu, |
636 | .ndo_change_rx_flags = macvlan_change_rx_flags, | |
637 | .ndo_set_mac_address = macvlan_set_mac_address, | |
df8ef8f3 | 638 | .ndo_set_rx_mode = macvlan_set_mac_lists, |
bc66154e | 639 | .ndo_get_stats64 = macvlan_dev_get_stats64, |
54a30c97 | 640 | .ndo_validate_addr = eth_validate_addr, |
8d13e670 JF |
641 | .ndo_vlan_rx_add_vid = macvlan_vlan_rx_add_vid, |
642 | .ndo_vlan_rx_kill_vid = macvlan_vlan_rx_kill_vid, | |
df8ef8f3 JF |
643 | .ndo_fdb_add = macvlan_fdb_add, |
644 | .ndo_fdb_del = macvlan_fdb_del, | |
645 | .ndo_fdb_dump = ndo_dflt_fdb_dump, | |
54a30c97 SH |
646 | }; |
647 | ||
8a35747a | 648 | void macvlan_common_setup(struct net_device *dev) |
b863ceb7 PM |
649 | { |
650 | ether_setup(dev); | |
651 | ||
550fd08c | 652 | dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING); |
54a30c97 | 653 | dev->netdev_ops = &macvlan_netdev_ops; |
b863ceb7 | 654 | dev->destructor = free_netdev; |
3b04ddde | 655 | dev->header_ops = &macvlan_hard_header_ops, |
b863ceb7 | 656 | dev->ethtool_ops = &macvlan_ethtool_ops; |
8a35747a HX |
657 | } |
658 | EXPORT_SYMBOL_GPL(macvlan_common_setup); | |
659 | ||
660 | static void macvlan_setup(struct net_device *dev) | |
661 | { | |
662 | macvlan_common_setup(dev); | |
b863ceb7 PM |
663 | dev->tx_queue_len = 0; |
664 | } | |
665 | ||
666 | static int macvlan_port_create(struct net_device *dev) | |
667 | { | |
668 | struct macvlan_port *port; | |
669 | unsigned int i; | |
ab95bfe0 | 670 | int err; |
b863ceb7 PM |
671 | |
672 | if (dev->type != ARPHRD_ETHER || dev->flags & IFF_LOOPBACK) | |
673 | return -EINVAL; | |
674 | ||
675 | port = kzalloc(sizeof(*port), GFP_KERNEL); | |
676 | if (port == NULL) | |
677 | return -ENOMEM; | |
678 | ||
eb06acdc | 679 | port->passthru = false; |
b863ceb7 PM |
680 | port->dev = dev; |
681 | INIT_LIST_HEAD(&port->vlans); | |
682 | for (i = 0; i < MACVLAN_HASH_SIZE; i++) | |
683 | INIT_HLIST_HEAD(&port->vlan_hash[i]); | |
ab95bfe0 | 684 | |
a35e2c1b JP |
685 | err = netdev_rx_handler_register(dev, macvlan_handle_frame, port); |
686 | if (err) | |
ab95bfe0 | 687 | kfree(port); |
d9351561 ED |
688 | else |
689 | dev->priv_flags |= IFF_MACVLAN_PORT; | |
ab95bfe0 | 690 | return err; |
b863ceb7 PM |
691 | } |
692 | ||
693 | static void macvlan_port_destroy(struct net_device *dev) | |
694 | { | |
a35e2c1b | 695 | struct macvlan_port *port = macvlan_port_get(dev); |
b863ceb7 | 696 | |
a35e2c1b | 697 | dev->priv_flags &= ~IFF_MACVLAN_PORT; |
ab95bfe0 | 698 | netdev_rx_handler_unregister(dev); |
6e070aec | 699 | kfree_rcu(port, rcu); |
b863ceb7 PM |
700 | } |
701 | ||
b863ceb7 PM |
702 | static int macvlan_validate(struct nlattr *tb[], struct nlattr *data[]) |
703 | { | |
704 | if (tb[IFLA_ADDRESS]) { | |
705 | if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) | |
706 | return -EINVAL; | |
707 | if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) | |
708 | return -EADDRNOTAVAIL; | |
709 | } | |
27c0b1a8 AB |
710 | |
711 | if (data && data[IFLA_MACVLAN_MODE]) { | |
712 | switch (nla_get_u32(data[IFLA_MACVLAN_MODE])) { | |
713 | case MACVLAN_MODE_PRIVATE: | |
714 | case MACVLAN_MODE_VEPA: | |
715 | case MACVLAN_MODE_BRIDGE: | |
eb06acdc | 716 | case MACVLAN_MODE_PASSTHRU: |
27c0b1a8 AB |
717 | break; |
718 | default: | |
719 | return -EINVAL; | |
720 | } | |
721 | } | |
b863ceb7 PM |
722 | return 0; |
723 | } | |
724 | ||
fc0663d6 AB |
725 | int macvlan_common_newlink(struct net *src_net, struct net_device *dev, |
726 | struct nlattr *tb[], struct nlattr *data[], | |
727 | int (*receive)(struct sk_buff *skb), | |
728 | int (*forward)(struct net_device *dev, | |
729 | struct sk_buff *skb)) | |
b863ceb7 PM |
730 | { |
731 | struct macvlan_dev *vlan = netdev_priv(dev); | |
732 | struct macvlan_port *port; | |
733 | struct net_device *lowerdev; | |
734 | int err; | |
735 | ||
736 | if (!tb[IFLA_LINK]) | |
737 | return -EINVAL; | |
738 | ||
81adee47 | 739 | lowerdev = __dev_get_by_index(src_net, nla_get_u32(tb[IFLA_LINK])); |
b863ceb7 PM |
740 | if (lowerdev == NULL) |
741 | return -ENODEV; | |
742 | ||
b0832a29 EB |
743 | /* When creating macvlans on top of other macvlans - use |
744 | * the real device as the lowerdev. | |
a6ca5f1d | 745 | */ |
b0832a29 EB |
746 | if (lowerdev->rtnl_link_ops == dev->rtnl_link_ops) { |
747 | struct macvlan_dev *lowervlan = netdev_priv(lowerdev); | |
748 | lowerdev = lowervlan->lowerdev; | |
749 | } | |
a6ca5f1d | 750 | |
b863ceb7 PM |
751 | if (!tb[IFLA_MTU]) |
752 | dev->mtu = lowerdev->mtu; | |
753 | else if (dev->mtu > lowerdev->mtu) | |
754 | return -EINVAL; | |
755 | ||
756 | if (!tb[IFLA_ADDRESS]) | |
7ce5d222 | 757 | eth_hw_addr_random(dev); |
b863ceb7 | 758 | |
a35e2c1b | 759 | if (!macvlan_port_exists(lowerdev)) { |
b863ceb7 PM |
760 | err = macvlan_port_create(lowerdev); |
761 | if (err < 0) | |
762 | return err; | |
763 | } | |
a35e2c1b | 764 | port = macvlan_port_get(lowerdev); |
b863ceb7 | 765 | |
eb06acdc SS |
766 | /* Only 1 macvlan device can be created in passthru mode */ |
767 | if (port->passthru) | |
768 | return -EINVAL; | |
769 | ||
b863ceb7 PM |
770 | vlan->lowerdev = lowerdev; |
771 | vlan->dev = dev; | |
772 | vlan->port = port; | |
fc0663d6 AB |
773 | vlan->receive = receive; |
774 | vlan->forward = forward; | |
b863ceb7 | 775 | |
27c0b1a8 AB |
776 | vlan->mode = MACVLAN_MODE_VEPA; |
777 | if (data && data[IFLA_MACVLAN_MODE]) | |
778 | vlan->mode = nla_get_u32(data[IFLA_MACVLAN_MODE]); | |
779 | ||
df8ef8f3 JF |
780 | if (data && data[IFLA_MACVLAN_FLAGS]) |
781 | vlan->flags = nla_get_u16(data[IFLA_MACVLAN_FLAGS]); | |
782 | ||
eb06acdc | 783 | if (vlan->mode == MACVLAN_MODE_PASSTHRU) { |
d5cd9244 | 784 | if (port->count) |
eb06acdc SS |
785 | return -EINVAL; |
786 | port->passthru = true; | |
787 | memcpy(dev->dev_addr, lowerdev->dev_addr, ETH_ALEN); | |
788 | } | |
789 | ||
7cd43db7 JP |
790 | err = netdev_upper_dev_link(lowerdev, dev); |
791 | if (err) | |
792 | goto destroy_port; | |
793 | ||
d5cd9244 | 794 | port->count += 1; |
b863ceb7 PM |
795 | err = register_netdevice(dev); |
796 | if (err < 0) | |
7cd43db7 | 797 | goto upper_dev_unlink; |
b863ceb7 PM |
798 | |
799 | list_add_tail(&vlan->list, &port->vlans); | |
fc4a7489 | 800 | netif_stacked_transfer_operstate(lowerdev, dev); |
f16d3d57 | 801 | |
b863ceb7 | 802 | return 0; |
f16d3d57 | 803 | |
7cd43db7 JP |
804 | upper_dev_unlink: |
805 | netdev_upper_dev_unlink(lowerdev, dev); | |
f16d3d57 | 806 | destroy_port: |
d5cd9244 EB |
807 | port->count -= 1; |
808 | if (!port->count) | |
f16d3d57 JP |
809 | macvlan_port_destroy(lowerdev); |
810 | ||
811 | return err; | |
b863ceb7 | 812 | } |
fc0663d6 | 813 | EXPORT_SYMBOL_GPL(macvlan_common_newlink); |
b863ceb7 | 814 | |
fc0663d6 AB |
815 | static int macvlan_newlink(struct net *src_net, struct net_device *dev, |
816 | struct nlattr *tb[], struct nlattr *data[]) | |
817 | { | |
818 | return macvlan_common_newlink(src_net, dev, tb, data, | |
819 | netif_rx, | |
820 | dev_forward_skb); | |
821 | } | |
822 | ||
823 | void macvlan_dellink(struct net_device *dev, struct list_head *head) | |
b863ceb7 PM |
824 | { |
825 | struct macvlan_dev *vlan = netdev_priv(dev); | |
b863ceb7 PM |
826 | |
827 | list_del(&vlan->list); | |
23289a37 | 828 | unregister_netdevice_queue(dev, head); |
7cd43db7 | 829 | netdev_upper_dev_unlink(vlan->lowerdev, dev); |
b863ceb7 | 830 | } |
fc0663d6 | 831 | EXPORT_SYMBOL_GPL(macvlan_dellink); |
b863ceb7 | 832 | |
27c0b1a8 AB |
833 | static int macvlan_changelink(struct net_device *dev, |
834 | struct nlattr *tb[], struct nlattr *data[]) | |
835 | { | |
836 | struct macvlan_dev *vlan = netdev_priv(dev); | |
837 | if (data && data[IFLA_MACVLAN_MODE]) | |
838 | vlan->mode = nla_get_u32(data[IFLA_MACVLAN_MODE]); | |
df8ef8f3 JF |
839 | if (data && data[IFLA_MACVLAN_FLAGS]) { |
840 | __u16 flags = nla_get_u16(data[IFLA_MACVLAN_FLAGS]); | |
841 | bool promisc = (flags ^ vlan->flags) & MACVLAN_FLAG_NOPROMISC; | |
842 | ||
843 | if (promisc && (flags & MACVLAN_FLAG_NOPROMISC)) | |
844 | dev_set_promiscuity(vlan->lowerdev, -1); | |
845 | else if (promisc && !(flags & MACVLAN_FLAG_NOPROMISC)) | |
846 | dev_set_promiscuity(vlan->lowerdev, 1); | |
847 | vlan->flags = flags; | |
848 | } | |
27c0b1a8 AB |
849 | return 0; |
850 | } | |
851 | ||
852 | static size_t macvlan_get_size(const struct net_device *dev) | |
853 | { | |
01fe944f ED |
854 | return (0 |
855 | + nla_total_size(4) /* IFLA_MACVLAN_MODE */ | |
856 | + nla_total_size(2) /* IFLA_MACVLAN_FLAGS */ | |
857 | ); | |
27c0b1a8 AB |
858 | } |
859 | ||
860 | static int macvlan_fill_info(struct sk_buff *skb, | |
861 | const struct net_device *dev) | |
862 | { | |
863 | struct macvlan_dev *vlan = netdev_priv(dev); | |
864 | ||
ead9a76c DM |
865 | if (nla_put_u32(skb, IFLA_MACVLAN_MODE, vlan->mode)) |
866 | goto nla_put_failure; | |
df8ef8f3 JF |
867 | if (nla_put_u16(skb, IFLA_MACVLAN_FLAGS, vlan->flags)) |
868 | goto nla_put_failure; | |
27c0b1a8 AB |
869 | return 0; |
870 | ||
871 | nla_put_failure: | |
872 | return -EMSGSIZE; | |
873 | } | |
874 | ||
875 | static const struct nla_policy macvlan_policy[IFLA_MACVLAN_MAX + 1] = { | |
df8ef8f3 JF |
876 | [IFLA_MACVLAN_MODE] = { .type = NLA_U32 }, |
877 | [IFLA_MACVLAN_FLAGS] = { .type = NLA_U16 }, | |
27c0b1a8 AB |
878 | }; |
879 | ||
fc0663d6 AB |
880 | int macvlan_link_register(struct rtnl_link_ops *ops) |
881 | { | |
882 | /* common fields */ | |
883 | ops->priv_size = sizeof(struct macvlan_dev); | |
fc0663d6 AB |
884 | ops->validate = macvlan_validate; |
885 | ops->maxtype = IFLA_MACVLAN_MAX; | |
886 | ops->policy = macvlan_policy; | |
887 | ops->changelink = macvlan_changelink; | |
888 | ops->get_size = macvlan_get_size; | |
889 | ops->fill_info = macvlan_fill_info; | |
890 | ||
891 | return rtnl_link_register(ops); | |
892 | }; | |
893 | EXPORT_SYMBOL_GPL(macvlan_link_register); | |
894 | ||
895 | static struct rtnl_link_ops macvlan_link_ops = { | |
b863ceb7 | 896 | .kind = "macvlan", |
8a35747a | 897 | .setup = macvlan_setup, |
b863ceb7 PM |
898 | .newlink = macvlan_newlink, |
899 | .dellink = macvlan_dellink, | |
900 | }; | |
901 | ||
902 | static int macvlan_device_event(struct notifier_block *unused, | |
903 | unsigned long event, void *ptr) | |
904 | { | |
905 | struct net_device *dev = ptr; | |
906 | struct macvlan_dev *vlan, *next; | |
907 | struct macvlan_port *port; | |
226bd341 | 908 | LIST_HEAD(list_kill); |
b863ceb7 | 909 | |
a35e2c1b | 910 | if (!macvlan_port_exists(dev)) |
b863ceb7 PM |
911 | return NOTIFY_DONE; |
912 | ||
a35e2c1b JP |
913 | port = macvlan_port_get(dev); |
914 | ||
b863ceb7 PM |
915 | switch (event) { |
916 | case NETDEV_CHANGE: | |
917 | list_for_each_entry(vlan, &port->vlans, list) | |
fc4a7489 PM |
918 | netif_stacked_transfer_operstate(vlan->lowerdev, |
919 | vlan->dev); | |
b863ceb7 PM |
920 | break; |
921 | case NETDEV_FEAT_CHANGE: | |
922 | list_for_each_entry(vlan, &port->vlans, list) { | |
923 | vlan->dev->features = dev->features & MACVLAN_FEATURES; | |
8c2acc53 | 924 | vlan->dev->gso_max_size = dev->gso_max_size; |
b863ceb7 PM |
925 | netdev_features_change(vlan->dev); |
926 | } | |
927 | break; | |
928 | case NETDEV_UNREGISTER: | |
3b27e105 DL |
929 | /* twiddle thumbs on netns device moves */ |
930 | if (dev->reg_state != NETREG_UNREGISTERING) | |
931 | break; | |
932 | ||
b863ceb7 | 933 | list_for_each_entry_safe(vlan, next, &port->vlans, list) |
226bd341 ED |
934 | vlan->dev->rtnl_link_ops->dellink(vlan->dev, &list_kill); |
935 | unregister_netdevice_many(&list_kill); | |
936 | list_del(&list_kill); | |
b863ceb7 | 937 | break; |
1c01fe14 JP |
938 | case NETDEV_PRE_TYPE_CHANGE: |
939 | /* Forbid underlaying device to change its type. */ | |
940 | return NOTIFY_BAD; | |
b863ceb7 PM |
941 | } |
942 | return NOTIFY_DONE; | |
943 | } | |
944 | ||
945 | static struct notifier_block macvlan_notifier_block __read_mostly = { | |
946 | .notifier_call = macvlan_device_event, | |
947 | }; | |
948 | ||
949 | static int __init macvlan_init_module(void) | |
950 | { | |
951 | int err; | |
952 | ||
953 | register_netdevice_notifier(&macvlan_notifier_block); | |
b863ceb7 | 954 | |
fc0663d6 | 955 | err = macvlan_link_register(&macvlan_link_ops); |
b863ceb7 PM |
956 | if (err < 0) |
957 | goto err1; | |
958 | return 0; | |
959 | err1: | |
b863ceb7 PM |
960 | unregister_netdevice_notifier(&macvlan_notifier_block); |
961 | return err; | |
962 | } | |
963 | ||
964 | static void __exit macvlan_cleanup_module(void) | |
965 | { | |
966 | rtnl_link_unregister(&macvlan_link_ops); | |
b863ceb7 PM |
967 | unregister_netdevice_notifier(&macvlan_notifier_block); |
968 | } | |
969 | ||
970 | module_init(macvlan_init_module); | |
971 | module_exit(macvlan_cleanup_module); | |
972 | ||
973 | MODULE_LICENSE("GPL"); | |
974 | MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>"); | |
975 | MODULE_DESCRIPTION("Driver for MAC address based VLANs"); | |
976 | MODULE_ALIAS_RTNL_LINK("macvlan"); |