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; | |
b863ceb7 | 58 | |
b67bfe0d | 59 | hlist_for_each_entry_rcu(vlan, &port->vlan_hash[addr[5]], hlist) { |
a6700db1 | 60 | if (ether_addr_equal_64bits(vlan->dev->dev_addr, addr)) |
b863ceb7 PM |
61 | return vlan; |
62 | } | |
63 | return NULL; | |
64 | } | |
65 | ||
f9ac30f0 EB |
66 | static void macvlan_hash_add(struct macvlan_dev *vlan) |
67 | { | |
68 | struct macvlan_port *port = vlan->port; | |
69 | const unsigned char *addr = vlan->dev->dev_addr; | |
70 | ||
71 | hlist_add_head_rcu(&vlan->hlist, &port->vlan_hash[addr[5]]); | |
72 | } | |
73 | ||
449f4544 | 74 | static void macvlan_hash_del(struct macvlan_dev *vlan, bool sync) |
f9ac30f0 EB |
75 | { |
76 | hlist_del_rcu(&vlan->hlist); | |
449f4544 ED |
77 | if (sync) |
78 | synchronize_rcu(); | |
f9ac30f0 EB |
79 | } |
80 | ||
81 | static void macvlan_hash_change_addr(struct macvlan_dev *vlan, | |
82 | const unsigned char *addr) | |
83 | { | |
449f4544 | 84 | macvlan_hash_del(vlan, true); |
f9ac30f0 EB |
85 | /* Now that we are unhashed it is safe to change the device |
86 | * address without confusing packet delivery. | |
87 | */ | |
88 | memcpy(vlan->dev->dev_addr, addr, ETH_ALEN); | |
89 | macvlan_hash_add(vlan); | |
90 | } | |
91 | ||
92 | static int macvlan_addr_busy(const struct macvlan_port *port, | |
93 | const unsigned char *addr) | |
94 | { | |
95 | /* Test to see if the specified multicast address is | |
96 | * currently in use by the underlying device or | |
97 | * another macvlan. | |
98 | */ | |
a6700db1 | 99 | if (ether_addr_equal_64bits(port->dev->dev_addr, addr)) |
f9ac30f0 EB |
100 | return 1; |
101 | ||
102 | if (macvlan_hash_lookup(port, addr)) | |
103 | return 1; | |
104 | ||
105 | return 0; | |
106 | } | |
107 | ||
a1e514c5 | 108 | |
fc0663d6 AB |
109 | static int macvlan_broadcast_one(struct sk_buff *skb, |
110 | const struct macvlan_dev *vlan, | |
618e1b74 | 111 | const struct ethhdr *eth, bool local) |
a1e514c5 | 112 | { |
fc0663d6 | 113 | struct net_device *dev = vlan->dev; |
a1e514c5 AB |
114 | if (!skb) |
115 | return NET_RX_DROP; | |
116 | ||
618e1b74 | 117 | if (local) |
fc0663d6 | 118 | return vlan->forward(dev, skb); |
618e1b74 | 119 | |
a1e514c5 | 120 | skb->dev = dev; |
a6700db1 | 121 | if (ether_addr_equal_64bits(eth->h_dest, dev->broadcast)) |
a1e514c5 AB |
122 | skb->pkt_type = PACKET_BROADCAST; |
123 | else | |
124 | skb->pkt_type = PACKET_MULTICAST; | |
125 | ||
fc0663d6 | 126 | return vlan->receive(skb); |
a1e514c5 AB |
127 | } |
128 | ||
3807ff58 ED |
129 | static u32 macvlan_hash_mix(const struct macvlan_dev *vlan) |
130 | { | |
131 | return (u32)(((unsigned long)vlan) >> L1_CACHE_SHIFT); | |
132 | } | |
133 | ||
134 | ||
135 | static unsigned int mc_hash(const struct macvlan_dev *vlan, | |
136 | const unsigned char *addr) | |
cd431e73 ED |
137 | { |
138 | u32 val = __get_unaligned_cpu32(addr + 2); | |
139 | ||
3807ff58 | 140 | val ^= macvlan_hash_mix(vlan); |
cd431e73 ED |
141 | return hash_32(val, MACVLAN_MC_FILTER_BITS); |
142 | } | |
143 | ||
b863ceb7 | 144 | static void macvlan_broadcast(struct sk_buff *skb, |
618e1b74 AB |
145 | const struct macvlan_port *port, |
146 | struct net_device *src, | |
147 | enum macvlan_mode mode) | |
b863ceb7 PM |
148 | { |
149 | const struct ethhdr *eth = eth_hdr(skb); | |
150 | const struct macvlan_dev *vlan; | |
b863ceb7 PM |
151 | struct sk_buff *nskb; |
152 | unsigned int i; | |
a1e514c5 | 153 | int err; |
3807ff58 | 154 | unsigned int hash; |
b863ceb7 | 155 | |
efbbced3 PM |
156 | if (skb->protocol == htons(ETH_P_PAUSE)) |
157 | return; | |
158 | ||
b863ceb7 | 159 | for (i = 0; i < MACVLAN_HASH_SIZE; i++) { |
b67bfe0d | 160 | hlist_for_each_entry_rcu(vlan, &port->vlan_hash[i], hlist) { |
618e1b74 AB |
161 | if (vlan->dev == src || !(vlan->mode & mode)) |
162 | continue; | |
163 | ||
3807ff58 | 164 | hash = mc_hash(vlan, eth->h_dest); |
cd431e73 ED |
165 | if (!test_bit(hash, vlan->mc_filter)) |
166 | continue; | |
b863ceb7 | 167 | nskb = skb_clone(skb, GFP_ATOMIC); |
fc0663d6 | 168 | err = macvlan_broadcast_one(nskb, vlan, eth, |
618e1b74 | 169 | mode == MACVLAN_MODE_BRIDGE); |
a1e514c5 AB |
170 | macvlan_count_rx(vlan, skb->len + ETH_HLEN, |
171 | err == NET_RX_SUCCESS, 1); | |
b863ceb7 PM |
172 | } |
173 | } | |
174 | } | |
175 | ||
176 | /* called under rcu_read_lock() from netif_receive_skb */ | |
8a4eb573 | 177 | static rx_handler_result_t macvlan_handle_frame(struct sk_buff **pskb) |
b863ceb7 | 178 | { |
ab95bfe0 | 179 | struct macvlan_port *port; |
8a4eb573 | 180 | struct sk_buff *skb = *pskb; |
b863ceb7 | 181 | const struct ethhdr *eth = eth_hdr(skb); |
b863ceb7 | 182 | const struct macvlan_dev *vlan; |
618e1b74 | 183 | const struct macvlan_dev *src; |
b863ceb7 | 184 | struct net_device *dev; |
ba01877f SS |
185 | unsigned int len = 0; |
186 | int ret = NET_RX_DROP; | |
b863ceb7 | 187 | |
a35e2c1b | 188 | port = macvlan_port_get_rcu(skb->dev); |
b863ceb7 | 189 | if (is_multicast_ether_addr(eth->h_dest)) { |
bc416d97 ED |
190 | skb = ip_check_defrag(skb, IP_DEFRAG_MACVLAN); |
191 | if (!skb) | |
192 | return RX_HANDLER_CONSUMED; | |
4ec7ac12 | 193 | eth = eth_hdr(skb); |
618e1b74 AB |
194 | src = macvlan_hash_lookup(port, eth->h_source); |
195 | if (!src) | |
196 | /* frame comes from an external address */ | |
197 | macvlan_broadcast(skb, port, NULL, | |
198 | MACVLAN_MODE_PRIVATE | | |
199 | MACVLAN_MODE_VEPA | | |
eb06acdc | 200 | MACVLAN_MODE_PASSTHRU| |
618e1b74 AB |
201 | MACVLAN_MODE_BRIDGE); |
202 | else if (src->mode == MACVLAN_MODE_VEPA) | |
203 | /* flood to everyone except source */ | |
204 | macvlan_broadcast(skb, port, src->dev, | |
205 | MACVLAN_MODE_VEPA | | |
206 | MACVLAN_MODE_BRIDGE); | |
207 | else if (src->mode == MACVLAN_MODE_BRIDGE) | |
208 | /* | |
209 | * flood only to VEPA ports, bridge ports | |
210 | * already saw the frame on the way out. | |
211 | */ | |
212 | macvlan_broadcast(skb, port, src->dev, | |
213 | MACVLAN_MODE_VEPA); | |
729e72a1 | 214 | else { |
215 | /* forward to original port. */ | |
216 | vlan = src; | |
217 | ret = macvlan_broadcast_one(skb, vlan, eth, 0); | |
218 | goto out; | |
219 | } | |
220 | ||
8a4eb573 | 221 | return RX_HANDLER_PASS; |
b863ceb7 PM |
222 | } |
223 | ||
eb06acdc SS |
224 | if (port->passthru) |
225 | vlan = list_first_entry(&port->vlans, struct macvlan_dev, list); | |
226 | else | |
227 | vlan = macvlan_hash_lookup(port, eth->h_dest); | |
b863ceb7 | 228 | if (vlan == NULL) |
8a4eb573 | 229 | return RX_HANDLER_PASS; |
b863ceb7 PM |
230 | |
231 | dev = vlan->dev; | |
232 | if (unlikely(!(dev->flags & IFF_UP))) { | |
233 | kfree_skb(skb); | |
8a4eb573 | 234 | return RX_HANDLER_CONSUMED; |
b863ceb7 | 235 | } |
a1e514c5 | 236 | len = skb->len + ETH_HLEN; |
b863ceb7 | 237 | skb = skb_share_check(skb, GFP_ATOMIC); |
a1e514c5 | 238 | if (!skb) |
ba01877f | 239 | goto out; |
b863ceb7 PM |
240 | |
241 | skb->dev = dev; | |
242 | skb->pkt_type = PACKET_HOST; | |
243 | ||
ba01877f SS |
244 | ret = vlan->receive(skb); |
245 | ||
246 | out: | |
247 | macvlan_count_rx(vlan, len, ret == NET_RX_SUCCESS, 0); | |
8a4eb573 | 248 | return RX_HANDLER_CONSUMED; |
b863ceb7 PM |
249 | } |
250 | ||
618e1b74 AB |
251 | static int macvlan_queue_xmit(struct sk_buff *skb, struct net_device *dev) |
252 | { | |
253 | const struct macvlan_dev *vlan = netdev_priv(dev); | |
254 | const struct macvlan_port *port = vlan->port; | |
255 | const struct macvlan_dev *dest; | |
12a2856b | 256 | __u8 ip_summed = skb->ip_summed; |
618e1b74 AB |
257 | |
258 | if (vlan->mode == MACVLAN_MODE_BRIDGE) { | |
259 | const struct ethhdr *eth = (void *)skb->data; | |
12a2856b | 260 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
618e1b74 AB |
261 | |
262 | /* send to other bridge ports directly */ | |
263 | if (is_multicast_ether_addr(eth->h_dest)) { | |
264 | macvlan_broadcast(skb, port, dev, MACVLAN_MODE_BRIDGE); | |
265 | goto xmit_world; | |
266 | } | |
267 | ||
268 | dest = macvlan_hash_lookup(port, eth->h_dest); | |
269 | if (dest && dest->mode == MACVLAN_MODE_BRIDGE) { | |
a37dd333 | 270 | /* send to lowerdev first for its network taps */ |
cb2d0f3e | 271 | dev_forward_skb(vlan->lowerdev, skb); |
618e1b74 AB |
272 | |
273 | return NET_XMIT_SUCCESS; | |
274 | } | |
275 | } | |
276 | ||
277 | xmit_world: | |
12a2856b | 278 | skb->ip_summed = ip_summed; |
59b9997b | 279 | skb->dev = vlan->lowerdev; |
618e1b74 AB |
280 | return dev_queue_xmit(skb); |
281 | } | |
282 | ||
fc0663d6 AB |
283 | netdev_tx_t macvlan_start_xmit(struct sk_buff *skb, |
284 | struct net_device *dev) | |
b863ceb7 | 285 | { |
b863ceb7 PM |
286 | unsigned int len = skb->len; |
287 | int ret; | |
8ffab51b | 288 | const struct macvlan_dev *vlan = netdev_priv(dev); |
b863ceb7 | 289 | |
618e1b74 | 290 | ret = macvlan_queue_xmit(skb, dev); |
2d6c9ffc | 291 | if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) { |
8ffab51b | 292 | struct macvlan_pcpu_stats *pcpu_stats; |
2c114553 | 293 | |
8ffab51b ED |
294 | pcpu_stats = this_cpu_ptr(vlan->pcpu_stats); |
295 | u64_stats_update_begin(&pcpu_stats->syncp); | |
296 | pcpu_stats->tx_packets++; | |
297 | pcpu_stats->tx_bytes += len; | |
298 | u64_stats_update_end(&pcpu_stats->syncp); | |
299 | } else { | |
300 | this_cpu_inc(vlan->pcpu_stats->tx_dropped); | |
301 | } | |
cbbef5e1 | 302 | return ret; |
b863ceb7 | 303 | } |
fc0663d6 | 304 | EXPORT_SYMBOL_GPL(macvlan_start_xmit); |
b863ceb7 PM |
305 | |
306 | static int macvlan_hard_header(struct sk_buff *skb, struct net_device *dev, | |
3b04ddde SH |
307 | unsigned short type, const void *daddr, |
308 | const void *saddr, unsigned len) | |
b863ceb7 PM |
309 | { |
310 | const struct macvlan_dev *vlan = netdev_priv(dev); | |
311 | struct net_device *lowerdev = vlan->lowerdev; | |
312 | ||
0c4e8581 SH |
313 | return dev_hard_header(skb, lowerdev, type, daddr, |
314 | saddr ? : dev->dev_addr, len); | |
b863ceb7 PM |
315 | } |
316 | ||
3b04ddde SH |
317 | static const struct header_ops macvlan_hard_header_ops = { |
318 | .create = macvlan_hard_header, | |
319 | .rebuild = eth_rebuild_header, | |
320 | .parse = eth_header_parse, | |
3b04ddde SH |
321 | .cache = eth_header_cache, |
322 | .cache_update = eth_header_cache_update, | |
323 | }; | |
324 | ||
b863ceb7 PM |
325 | static int macvlan_open(struct net_device *dev) |
326 | { | |
327 | struct macvlan_dev *vlan = netdev_priv(dev); | |
b863ceb7 PM |
328 | struct net_device *lowerdev = vlan->lowerdev; |
329 | int err; | |
330 | ||
eb06acdc | 331 | if (vlan->port->passthru) { |
df8ef8f3 JF |
332 | if (!(vlan->flags & MACVLAN_FLAG_NOPROMISC)) |
333 | dev_set_promiscuity(lowerdev, 1); | |
eb06acdc SS |
334 | goto hash_add; |
335 | } | |
336 | ||
f9ac30f0 EB |
337 | err = -EBUSY; |
338 | if (macvlan_addr_busy(vlan->port, dev->dev_addr)) | |
339 | goto out; | |
340 | ||
a748ee24 | 341 | err = dev_uc_add(lowerdev, dev->dev_addr); |
b863ceb7 | 342 | if (err < 0) |
b89fb7da WC |
343 | goto out; |
344 | if (dev->flags & IFF_ALLMULTI) { | |
345 | err = dev_set_allmulti(lowerdev, 1); | |
346 | if (err < 0) | |
347 | goto del_unicast; | |
348 | } | |
eb06acdc SS |
349 | |
350 | hash_add: | |
f9ac30f0 | 351 | macvlan_hash_add(vlan); |
b863ceb7 | 352 | return 0; |
b89fb7da WC |
353 | |
354 | del_unicast: | |
a748ee24 | 355 | dev_uc_del(lowerdev, dev->dev_addr); |
b89fb7da WC |
356 | out: |
357 | return err; | |
b863ceb7 PM |
358 | } |
359 | ||
360 | static int macvlan_stop(struct net_device *dev) | |
361 | { | |
362 | struct macvlan_dev *vlan = netdev_priv(dev); | |
363 | struct net_device *lowerdev = vlan->lowerdev; | |
364 | ||
df8ef8f3 JF |
365 | dev_uc_unsync(lowerdev, dev); |
366 | dev_mc_unsync(lowerdev, dev); | |
367 | ||
eb06acdc | 368 | if (vlan->port->passthru) { |
df8ef8f3 JF |
369 | if (!(vlan->flags & MACVLAN_FLAG_NOPROMISC)) |
370 | dev_set_promiscuity(lowerdev, -1); | |
eb06acdc SS |
371 | goto hash_del; |
372 | } | |
373 | ||
b863ceb7 PM |
374 | if (dev->flags & IFF_ALLMULTI) |
375 | dev_set_allmulti(lowerdev, -1); | |
376 | ||
a748ee24 | 377 | dev_uc_del(lowerdev, dev->dev_addr); |
b863ceb7 | 378 | |
eb06acdc | 379 | hash_del: |
449f4544 | 380 | macvlan_hash_del(vlan, !dev->dismantle); |
b863ceb7 PM |
381 | return 0; |
382 | } | |
383 | ||
ad5d20a6 PM |
384 | static int macvlan_set_mac_address(struct net_device *dev, void *p) |
385 | { | |
386 | struct macvlan_dev *vlan = netdev_priv(dev); | |
387 | struct net_device *lowerdev = vlan->lowerdev; | |
388 | struct sockaddr *addr = p; | |
389 | int err; | |
390 | ||
391 | if (!is_valid_ether_addr(addr->sa_data)) | |
392 | return -EADDRNOTAVAIL; | |
393 | ||
f9ac30f0 EB |
394 | if (!(dev->flags & IFF_UP)) { |
395 | /* Just copy in the new address */ | |
396 | memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN); | |
397 | } else { | |
398 | /* Rehash and update the device filters */ | |
399 | if (macvlan_addr_busy(vlan->port, addr->sa_data)) | |
400 | return -EBUSY; | |
ad5d20a6 | 401 | |
a748ee24 | 402 | err = dev_uc_add(lowerdev, addr->sa_data); |
ccffad25 | 403 | if (err) |
f9ac30f0 | 404 | return err; |
ad5d20a6 | 405 | |
a748ee24 | 406 | dev_uc_del(lowerdev, dev->dev_addr); |
f9ac30f0 EB |
407 | |
408 | macvlan_hash_change_addr(vlan, addr->sa_data); | |
409 | } | |
ad5d20a6 PM |
410 | return 0; |
411 | } | |
412 | ||
b863ceb7 PM |
413 | static void macvlan_change_rx_flags(struct net_device *dev, int change) |
414 | { | |
415 | struct macvlan_dev *vlan = netdev_priv(dev); | |
416 | struct net_device *lowerdev = vlan->lowerdev; | |
417 | ||
418 | if (change & IFF_ALLMULTI) | |
419 | dev_set_allmulti(lowerdev, dev->flags & IFF_ALLMULTI ? 1 : -1); | |
420 | } | |
421 | ||
df8ef8f3 | 422 | static void macvlan_set_mac_lists(struct net_device *dev) |
b863ceb7 PM |
423 | { |
424 | struct macvlan_dev *vlan = netdev_priv(dev); | |
425 | ||
cd431e73 ED |
426 | if (dev->flags & (IFF_PROMISC | IFF_ALLMULTI)) { |
427 | bitmap_fill(vlan->mc_filter, MACVLAN_MC_FILTER_SZ); | |
428 | } else { | |
429 | struct netdev_hw_addr *ha; | |
430 | DECLARE_BITMAP(filter, MACVLAN_MC_FILTER_SZ); | |
431 | ||
432 | bitmap_zero(filter, MACVLAN_MC_FILTER_SZ); | |
433 | netdev_for_each_mc_addr(ha, dev) { | |
3807ff58 | 434 | __set_bit(mc_hash(vlan, ha->addr), filter); |
cd431e73 | 435 | } |
d5270430 | 436 | |
3807ff58 | 437 | __set_bit(mc_hash(vlan, dev->broadcast), filter); |
d5270430 | 438 | |
cd431e73 ED |
439 | bitmap_copy(vlan->mc_filter, filter, MACVLAN_MC_FILTER_SZ); |
440 | } | |
df8ef8f3 | 441 | dev_uc_sync(vlan->lowerdev, dev); |
b863ceb7 PM |
442 | dev_mc_sync(vlan->lowerdev, dev); |
443 | } | |
444 | ||
445 | static int macvlan_change_mtu(struct net_device *dev, int new_mtu) | |
446 | { | |
447 | struct macvlan_dev *vlan = netdev_priv(dev); | |
448 | ||
449 | if (new_mtu < 68 || vlan->lowerdev->mtu < new_mtu) | |
450 | return -EINVAL; | |
451 | dev->mtu = new_mtu; | |
452 | return 0; | |
453 | } | |
454 | ||
455 | /* | |
456 | * macvlan network devices have devices nesting below it and are a special | |
457 | * "super class" of normal network devices; split their locks off into a | |
458 | * separate class since they always nest. | |
459 | */ | |
460 | static struct lock_class_key macvlan_netdev_xmit_lock_key; | |
cf508b12 | 461 | static struct lock_class_key macvlan_netdev_addr_lock_key; |
b863ceb7 PM |
462 | |
463 | #define MACVLAN_FEATURES \ | |
464 | (NETIF_F_SG | NETIF_F_ALL_CSUM | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST | \ | |
465 | NETIF_F_GSO | NETIF_F_TSO | NETIF_F_UFO | NETIF_F_GSO_ROBUST | \ | |
8d13e670 JF |
466 | NETIF_F_TSO_ECN | NETIF_F_TSO6 | NETIF_F_GRO | NETIF_F_RXCSUM | \ |
467 | NETIF_F_HW_VLAN_FILTER) | |
b863ceb7 PM |
468 | |
469 | #define MACVLAN_STATE_MASK \ | |
470 | ((1<<__LINK_STATE_NOCARRIER) | (1<<__LINK_STATE_DORMANT)) | |
471 | ||
e8a0464c DM |
472 | static void macvlan_set_lockdep_class_one(struct net_device *dev, |
473 | struct netdev_queue *txq, | |
474 | void *_unused) | |
c773e847 DM |
475 | { |
476 | lockdep_set_class(&txq->_xmit_lock, | |
477 | &macvlan_netdev_xmit_lock_key); | |
478 | } | |
479 | ||
480 | static void macvlan_set_lockdep_class(struct net_device *dev) | |
481 | { | |
cf508b12 DM |
482 | lockdep_set_class(&dev->addr_list_lock, |
483 | &macvlan_netdev_addr_lock_key); | |
e8a0464c | 484 | netdev_for_each_tx_queue(dev, macvlan_set_lockdep_class_one, NULL); |
c773e847 DM |
485 | } |
486 | ||
b863ceb7 PM |
487 | static int macvlan_init(struct net_device *dev) |
488 | { | |
489 | struct macvlan_dev *vlan = netdev_priv(dev); | |
490 | const struct net_device *lowerdev = vlan->lowerdev; | |
491 | ||
492 | dev->state = (dev->state & ~MACVLAN_STATE_MASK) | | |
493 | (lowerdev->state & MACVLAN_STATE_MASK); | |
494 | dev->features = lowerdev->features & MACVLAN_FEATURES; | |
8ffab51b | 495 | dev->features |= NETIF_F_LLTX; |
8c2acc53 | 496 | dev->gso_max_size = lowerdev->gso_max_size; |
b863ceb7 | 497 | dev->iflink = lowerdev->ifindex; |
ef5c8996 | 498 | dev->hard_header_len = lowerdev->hard_header_len; |
b863ceb7 | 499 | |
c773e847 DM |
500 | macvlan_set_lockdep_class(dev); |
501 | ||
8ffab51b ED |
502 | vlan->pcpu_stats = alloc_percpu(struct macvlan_pcpu_stats); |
503 | if (!vlan->pcpu_stats) | |
fccaf710 ED |
504 | return -ENOMEM; |
505 | ||
b863ceb7 PM |
506 | return 0; |
507 | } | |
508 | ||
fccaf710 ED |
509 | static void macvlan_uninit(struct net_device *dev) |
510 | { | |
511 | struct macvlan_dev *vlan = netdev_priv(dev); | |
d5cd9244 | 512 | struct macvlan_port *port = vlan->port; |
fccaf710 | 513 | |
8ffab51b | 514 | free_percpu(vlan->pcpu_stats); |
d5cd9244 EB |
515 | |
516 | port->count -= 1; | |
517 | if (!port->count) | |
518 | macvlan_port_destroy(port->dev); | |
fccaf710 ED |
519 | } |
520 | ||
28172739 ED |
521 | static struct rtnl_link_stats64 *macvlan_dev_get_stats64(struct net_device *dev, |
522 | struct rtnl_link_stats64 *stats) | |
fccaf710 | 523 | { |
fccaf710 ED |
524 | struct macvlan_dev *vlan = netdev_priv(dev); |
525 | ||
8ffab51b ED |
526 | if (vlan->pcpu_stats) { |
527 | struct macvlan_pcpu_stats *p; | |
528 | u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes; | |
529 | u32 rx_errors = 0, tx_dropped = 0; | |
bc66154e | 530 | unsigned int start; |
fccaf710 ED |
531 | int i; |
532 | ||
533 | for_each_possible_cpu(i) { | |
8ffab51b | 534 | p = per_cpu_ptr(vlan->pcpu_stats, i); |
bc66154e ED |
535 | do { |
536 | start = u64_stats_fetch_begin_bh(&p->syncp); | |
537 | rx_packets = p->rx_packets; | |
538 | rx_bytes = p->rx_bytes; | |
539 | rx_multicast = p->rx_multicast; | |
8ffab51b ED |
540 | tx_packets = p->tx_packets; |
541 | tx_bytes = p->tx_bytes; | |
bc66154e | 542 | } while (u64_stats_fetch_retry_bh(&p->syncp, start)); |
8ffab51b ED |
543 | |
544 | stats->rx_packets += rx_packets; | |
545 | stats->rx_bytes += rx_bytes; | |
546 | stats->multicast += rx_multicast; | |
547 | stats->tx_packets += tx_packets; | |
548 | stats->tx_bytes += tx_bytes; | |
549 | /* rx_errors & tx_dropped are u32, updated | |
550 | * without syncp protection. | |
551 | */ | |
552 | rx_errors += p->rx_errors; | |
553 | tx_dropped += p->tx_dropped; | |
fccaf710 | 554 | } |
8ffab51b ED |
555 | stats->rx_errors = rx_errors; |
556 | stats->rx_dropped = rx_errors; | |
557 | stats->tx_dropped = tx_dropped; | |
fccaf710 ED |
558 | } |
559 | return stats; | |
560 | } | |
561 | ||
8e586137 | 562 | static int macvlan_vlan_rx_add_vid(struct net_device *dev, |
8d13e670 JF |
563 | unsigned short vid) |
564 | { | |
565 | struct macvlan_dev *vlan = netdev_priv(dev); | |
566 | struct net_device *lowerdev = vlan->lowerdev; | |
8d13e670 | 567 | |
87002b03 | 568 | return vlan_vid_add(lowerdev, vid); |
8d13e670 JF |
569 | } |
570 | ||
8e586137 | 571 | static int macvlan_vlan_rx_kill_vid(struct net_device *dev, |
8d13e670 JF |
572 | unsigned short vid) |
573 | { | |
574 | struct macvlan_dev *vlan = netdev_priv(dev); | |
575 | struct net_device *lowerdev = vlan->lowerdev; | |
8d13e670 | 576 | |
87002b03 | 577 | vlan_vid_del(lowerdev, vid); |
8e586137 | 578 | return 0; |
8d13e670 JF |
579 | } |
580 | ||
edc7d573 | 581 | static int macvlan_fdb_add(struct ndmsg *ndm, struct nlattr *tb[], |
df8ef8f3 | 582 | struct net_device *dev, |
6b6e2725 | 583 | const unsigned char *addr, |
df8ef8f3 JF |
584 | u16 flags) |
585 | { | |
586 | struct macvlan_dev *vlan = netdev_priv(dev); | |
587 | int err = -EINVAL; | |
588 | ||
589 | if (!vlan->port->passthru) | |
590 | return -EOPNOTSUPP; | |
591 | ||
592 | if (is_unicast_ether_addr(addr)) | |
593 | err = dev_uc_add_excl(dev, addr); | |
594 | else if (is_multicast_ether_addr(addr)) | |
595 | err = dev_mc_add_excl(dev, addr); | |
596 | ||
597 | return err; | |
598 | } | |
599 | ||
1690be63 | 600 | static int macvlan_fdb_del(struct ndmsg *ndm, struct nlattr *tb[], |
df8ef8f3 | 601 | struct net_device *dev, |
6b6e2725 | 602 | const unsigned char *addr) |
df8ef8f3 JF |
603 | { |
604 | struct macvlan_dev *vlan = netdev_priv(dev); | |
605 | int err = -EINVAL; | |
606 | ||
607 | if (!vlan->port->passthru) | |
608 | return -EOPNOTSUPP; | |
609 | ||
610 | if (is_unicast_ether_addr(addr)) | |
611 | err = dev_uc_del(dev, addr); | |
612 | else if (is_multicast_ether_addr(addr)) | |
613 | err = dev_mc_del(dev, addr); | |
614 | ||
615 | return err; | |
616 | } | |
617 | ||
b863ceb7 PM |
618 | static void macvlan_ethtool_get_drvinfo(struct net_device *dev, |
619 | struct ethtool_drvinfo *drvinfo) | |
620 | { | |
7826d43f JP |
621 | strlcpy(drvinfo->driver, "macvlan", sizeof(drvinfo->driver)); |
622 | strlcpy(drvinfo->version, "0.1", sizeof(drvinfo->version)); | |
b863ceb7 PM |
623 | } |
624 | ||
9edb8bb6 SH |
625 | static int macvlan_ethtool_get_settings(struct net_device *dev, |
626 | struct ethtool_cmd *cmd) | |
627 | { | |
628 | const struct macvlan_dev *vlan = netdev_priv(dev); | |
4bc71cb9 JP |
629 | |
630 | return __ethtool_get_settings(vlan->lowerdev, cmd); | |
9edb8bb6 SH |
631 | } |
632 | ||
b863ceb7 PM |
633 | static const struct ethtool_ops macvlan_ethtool_ops = { |
634 | .get_link = ethtool_op_get_link, | |
9edb8bb6 | 635 | .get_settings = macvlan_ethtool_get_settings, |
b863ceb7 PM |
636 | .get_drvinfo = macvlan_ethtool_get_drvinfo, |
637 | }; | |
638 | ||
54a30c97 SH |
639 | static const struct net_device_ops macvlan_netdev_ops = { |
640 | .ndo_init = macvlan_init, | |
fccaf710 | 641 | .ndo_uninit = macvlan_uninit, |
54a30c97 SH |
642 | .ndo_open = macvlan_open, |
643 | .ndo_stop = macvlan_stop, | |
00829823 | 644 | .ndo_start_xmit = macvlan_start_xmit, |
54a30c97 SH |
645 | .ndo_change_mtu = macvlan_change_mtu, |
646 | .ndo_change_rx_flags = macvlan_change_rx_flags, | |
647 | .ndo_set_mac_address = macvlan_set_mac_address, | |
df8ef8f3 | 648 | .ndo_set_rx_mode = macvlan_set_mac_lists, |
bc66154e | 649 | .ndo_get_stats64 = macvlan_dev_get_stats64, |
54a30c97 | 650 | .ndo_validate_addr = eth_validate_addr, |
8d13e670 JF |
651 | .ndo_vlan_rx_add_vid = macvlan_vlan_rx_add_vid, |
652 | .ndo_vlan_rx_kill_vid = macvlan_vlan_rx_kill_vid, | |
df8ef8f3 JF |
653 | .ndo_fdb_add = macvlan_fdb_add, |
654 | .ndo_fdb_del = macvlan_fdb_del, | |
655 | .ndo_fdb_dump = ndo_dflt_fdb_dump, | |
54a30c97 SH |
656 | }; |
657 | ||
8a35747a | 658 | void macvlan_common_setup(struct net_device *dev) |
b863ceb7 PM |
659 | { |
660 | ether_setup(dev); | |
661 | ||
550fd08c | 662 | dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING); |
87ab7f6f | 663 | dev->priv_flags |= IFF_UNICAST_FLT; |
54a30c97 | 664 | dev->netdev_ops = &macvlan_netdev_ops; |
b863ceb7 | 665 | dev->destructor = free_netdev; |
3b04ddde | 666 | dev->header_ops = &macvlan_hard_header_ops, |
b863ceb7 | 667 | dev->ethtool_ops = &macvlan_ethtool_ops; |
8a35747a HX |
668 | } |
669 | EXPORT_SYMBOL_GPL(macvlan_common_setup); | |
670 | ||
671 | static void macvlan_setup(struct net_device *dev) | |
672 | { | |
673 | macvlan_common_setup(dev); | |
b863ceb7 PM |
674 | dev->tx_queue_len = 0; |
675 | } | |
676 | ||
677 | static int macvlan_port_create(struct net_device *dev) | |
678 | { | |
679 | struct macvlan_port *port; | |
680 | unsigned int i; | |
ab95bfe0 | 681 | int err; |
b863ceb7 PM |
682 | |
683 | if (dev->type != ARPHRD_ETHER || dev->flags & IFF_LOOPBACK) | |
684 | return -EINVAL; | |
685 | ||
686 | port = kzalloc(sizeof(*port), GFP_KERNEL); | |
687 | if (port == NULL) | |
688 | return -ENOMEM; | |
689 | ||
eb06acdc | 690 | port->passthru = false; |
b863ceb7 PM |
691 | port->dev = dev; |
692 | INIT_LIST_HEAD(&port->vlans); | |
693 | for (i = 0; i < MACVLAN_HASH_SIZE; i++) | |
694 | INIT_HLIST_HEAD(&port->vlan_hash[i]); | |
ab95bfe0 | 695 | |
a35e2c1b JP |
696 | err = netdev_rx_handler_register(dev, macvlan_handle_frame, port); |
697 | if (err) | |
ab95bfe0 | 698 | kfree(port); |
d9351561 ED |
699 | else |
700 | dev->priv_flags |= IFF_MACVLAN_PORT; | |
ab95bfe0 | 701 | return err; |
b863ceb7 PM |
702 | } |
703 | ||
704 | static void macvlan_port_destroy(struct net_device *dev) | |
705 | { | |
a35e2c1b | 706 | struct macvlan_port *port = macvlan_port_get(dev); |
b863ceb7 | 707 | |
a35e2c1b | 708 | dev->priv_flags &= ~IFF_MACVLAN_PORT; |
ab95bfe0 | 709 | netdev_rx_handler_unregister(dev); |
6e070aec | 710 | kfree_rcu(port, rcu); |
b863ceb7 PM |
711 | } |
712 | ||
b863ceb7 PM |
713 | static int macvlan_validate(struct nlattr *tb[], struct nlattr *data[]) |
714 | { | |
715 | if (tb[IFLA_ADDRESS]) { | |
716 | if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) | |
717 | return -EINVAL; | |
718 | if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) | |
719 | return -EADDRNOTAVAIL; | |
720 | } | |
27c0b1a8 AB |
721 | |
722 | if (data && data[IFLA_MACVLAN_MODE]) { | |
723 | switch (nla_get_u32(data[IFLA_MACVLAN_MODE])) { | |
724 | case MACVLAN_MODE_PRIVATE: | |
725 | case MACVLAN_MODE_VEPA: | |
726 | case MACVLAN_MODE_BRIDGE: | |
eb06acdc | 727 | case MACVLAN_MODE_PASSTHRU: |
27c0b1a8 AB |
728 | break; |
729 | default: | |
730 | return -EINVAL; | |
731 | } | |
732 | } | |
b863ceb7 PM |
733 | return 0; |
734 | } | |
735 | ||
fc0663d6 AB |
736 | int macvlan_common_newlink(struct net *src_net, struct net_device *dev, |
737 | struct nlattr *tb[], struct nlattr *data[], | |
738 | int (*receive)(struct sk_buff *skb), | |
739 | int (*forward)(struct net_device *dev, | |
740 | struct sk_buff *skb)) | |
b863ceb7 PM |
741 | { |
742 | struct macvlan_dev *vlan = netdev_priv(dev); | |
743 | struct macvlan_port *port; | |
744 | struct net_device *lowerdev; | |
745 | int err; | |
746 | ||
747 | if (!tb[IFLA_LINK]) | |
748 | return -EINVAL; | |
749 | ||
81adee47 | 750 | lowerdev = __dev_get_by_index(src_net, nla_get_u32(tb[IFLA_LINK])); |
b863ceb7 PM |
751 | if (lowerdev == NULL) |
752 | return -ENODEV; | |
753 | ||
b0832a29 EB |
754 | /* When creating macvlans on top of other macvlans - use |
755 | * the real device as the lowerdev. | |
a6ca5f1d | 756 | */ |
b0832a29 EB |
757 | if (lowerdev->rtnl_link_ops == dev->rtnl_link_ops) { |
758 | struct macvlan_dev *lowervlan = netdev_priv(lowerdev); | |
759 | lowerdev = lowervlan->lowerdev; | |
760 | } | |
a6ca5f1d | 761 | |
b863ceb7 PM |
762 | if (!tb[IFLA_MTU]) |
763 | dev->mtu = lowerdev->mtu; | |
764 | else if (dev->mtu > lowerdev->mtu) | |
765 | return -EINVAL; | |
766 | ||
767 | if (!tb[IFLA_ADDRESS]) | |
7ce5d222 | 768 | eth_hw_addr_random(dev); |
b863ceb7 | 769 | |
a35e2c1b | 770 | if (!macvlan_port_exists(lowerdev)) { |
b863ceb7 PM |
771 | err = macvlan_port_create(lowerdev); |
772 | if (err < 0) | |
773 | return err; | |
774 | } | |
a35e2c1b | 775 | port = macvlan_port_get(lowerdev); |
b863ceb7 | 776 | |
eb06acdc SS |
777 | /* Only 1 macvlan device can be created in passthru mode */ |
778 | if (port->passthru) | |
779 | return -EINVAL; | |
780 | ||
b863ceb7 PM |
781 | vlan->lowerdev = lowerdev; |
782 | vlan->dev = dev; | |
783 | vlan->port = port; | |
fc0663d6 AB |
784 | vlan->receive = receive; |
785 | vlan->forward = forward; | |
b863ceb7 | 786 | |
27c0b1a8 AB |
787 | vlan->mode = MACVLAN_MODE_VEPA; |
788 | if (data && data[IFLA_MACVLAN_MODE]) | |
789 | vlan->mode = nla_get_u32(data[IFLA_MACVLAN_MODE]); | |
790 | ||
df8ef8f3 JF |
791 | if (data && data[IFLA_MACVLAN_FLAGS]) |
792 | vlan->flags = nla_get_u16(data[IFLA_MACVLAN_FLAGS]); | |
793 | ||
eb06acdc | 794 | if (vlan->mode == MACVLAN_MODE_PASSTHRU) { |
d5cd9244 | 795 | if (port->count) |
eb06acdc SS |
796 | return -EINVAL; |
797 | port->passthru = true; | |
798 | memcpy(dev->dev_addr, lowerdev->dev_addr, ETH_ALEN); | |
799 | } | |
800 | ||
7cd43db7 JP |
801 | err = netdev_upper_dev_link(lowerdev, dev); |
802 | if (err) | |
803 | goto destroy_port; | |
804 | ||
d5cd9244 | 805 | port->count += 1; |
b863ceb7 PM |
806 | err = register_netdevice(dev); |
807 | if (err < 0) | |
7cd43db7 | 808 | goto upper_dev_unlink; |
b863ceb7 PM |
809 | |
810 | list_add_tail(&vlan->list, &port->vlans); | |
fc4a7489 | 811 | netif_stacked_transfer_operstate(lowerdev, dev); |
f16d3d57 | 812 | |
b863ceb7 | 813 | return 0; |
f16d3d57 | 814 | |
7cd43db7 JP |
815 | upper_dev_unlink: |
816 | netdev_upper_dev_unlink(lowerdev, dev); | |
f16d3d57 | 817 | destroy_port: |
d5cd9244 EB |
818 | port->count -= 1; |
819 | if (!port->count) | |
f16d3d57 JP |
820 | macvlan_port_destroy(lowerdev); |
821 | ||
822 | return err; | |
b863ceb7 | 823 | } |
fc0663d6 | 824 | EXPORT_SYMBOL_GPL(macvlan_common_newlink); |
b863ceb7 | 825 | |
fc0663d6 AB |
826 | static int macvlan_newlink(struct net *src_net, struct net_device *dev, |
827 | struct nlattr *tb[], struct nlattr *data[]) | |
828 | { | |
829 | return macvlan_common_newlink(src_net, dev, tb, data, | |
830 | netif_rx, | |
831 | dev_forward_skb); | |
832 | } | |
833 | ||
834 | void macvlan_dellink(struct net_device *dev, struct list_head *head) | |
b863ceb7 PM |
835 | { |
836 | struct macvlan_dev *vlan = netdev_priv(dev); | |
b863ceb7 PM |
837 | |
838 | list_del(&vlan->list); | |
23289a37 | 839 | unregister_netdevice_queue(dev, head); |
7cd43db7 | 840 | netdev_upper_dev_unlink(vlan->lowerdev, dev); |
b863ceb7 | 841 | } |
fc0663d6 | 842 | EXPORT_SYMBOL_GPL(macvlan_dellink); |
b863ceb7 | 843 | |
27c0b1a8 AB |
844 | static int macvlan_changelink(struct net_device *dev, |
845 | struct nlattr *tb[], struct nlattr *data[]) | |
846 | { | |
847 | struct macvlan_dev *vlan = netdev_priv(dev); | |
848 | if (data && data[IFLA_MACVLAN_MODE]) | |
849 | vlan->mode = nla_get_u32(data[IFLA_MACVLAN_MODE]); | |
df8ef8f3 JF |
850 | if (data && data[IFLA_MACVLAN_FLAGS]) { |
851 | __u16 flags = nla_get_u16(data[IFLA_MACVLAN_FLAGS]); | |
852 | bool promisc = (flags ^ vlan->flags) & MACVLAN_FLAG_NOPROMISC; | |
853 | ||
854 | if (promisc && (flags & MACVLAN_FLAG_NOPROMISC)) | |
855 | dev_set_promiscuity(vlan->lowerdev, -1); | |
856 | else if (promisc && !(flags & MACVLAN_FLAG_NOPROMISC)) | |
857 | dev_set_promiscuity(vlan->lowerdev, 1); | |
858 | vlan->flags = flags; | |
859 | } | |
27c0b1a8 AB |
860 | return 0; |
861 | } | |
862 | ||
863 | static size_t macvlan_get_size(const struct net_device *dev) | |
864 | { | |
01fe944f ED |
865 | return (0 |
866 | + nla_total_size(4) /* IFLA_MACVLAN_MODE */ | |
867 | + nla_total_size(2) /* IFLA_MACVLAN_FLAGS */ | |
868 | ); | |
27c0b1a8 AB |
869 | } |
870 | ||
871 | static int macvlan_fill_info(struct sk_buff *skb, | |
872 | const struct net_device *dev) | |
873 | { | |
874 | struct macvlan_dev *vlan = netdev_priv(dev); | |
875 | ||
ead9a76c DM |
876 | if (nla_put_u32(skb, IFLA_MACVLAN_MODE, vlan->mode)) |
877 | goto nla_put_failure; | |
df8ef8f3 JF |
878 | if (nla_put_u16(skb, IFLA_MACVLAN_FLAGS, vlan->flags)) |
879 | goto nla_put_failure; | |
27c0b1a8 AB |
880 | return 0; |
881 | ||
882 | nla_put_failure: | |
883 | return -EMSGSIZE; | |
884 | } | |
885 | ||
886 | static const struct nla_policy macvlan_policy[IFLA_MACVLAN_MAX + 1] = { | |
df8ef8f3 JF |
887 | [IFLA_MACVLAN_MODE] = { .type = NLA_U32 }, |
888 | [IFLA_MACVLAN_FLAGS] = { .type = NLA_U16 }, | |
27c0b1a8 AB |
889 | }; |
890 | ||
fc0663d6 AB |
891 | int macvlan_link_register(struct rtnl_link_ops *ops) |
892 | { | |
893 | /* common fields */ | |
894 | ops->priv_size = sizeof(struct macvlan_dev); | |
fc0663d6 AB |
895 | ops->validate = macvlan_validate; |
896 | ops->maxtype = IFLA_MACVLAN_MAX; | |
897 | ops->policy = macvlan_policy; | |
898 | ops->changelink = macvlan_changelink; | |
899 | ops->get_size = macvlan_get_size; | |
900 | ops->fill_info = macvlan_fill_info; | |
901 | ||
902 | return rtnl_link_register(ops); | |
903 | }; | |
904 | EXPORT_SYMBOL_GPL(macvlan_link_register); | |
905 | ||
906 | static struct rtnl_link_ops macvlan_link_ops = { | |
b863ceb7 | 907 | .kind = "macvlan", |
8a35747a | 908 | .setup = macvlan_setup, |
b863ceb7 PM |
909 | .newlink = macvlan_newlink, |
910 | .dellink = macvlan_dellink, | |
911 | }; | |
912 | ||
913 | static int macvlan_device_event(struct notifier_block *unused, | |
914 | unsigned long event, void *ptr) | |
915 | { | |
916 | struct net_device *dev = ptr; | |
917 | struct macvlan_dev *vlan, *next; | |
918 | struct macvlan_port *port; | |
226bd341 | 919 | LIST_HEAD(list_kill); |
b863ceb7 | 920 | |
a35e2c1b | 921 | if (!macvlan_port_exists(dev)) |
b863ceb7 PM |
922 | return NOTIFY_DONE; |
923 | ||
a35e2c1b JP |
924 | port = macvlan_port_get(dev); |
925 | ||
b863ceb7 PM |
926 | switch (event) { |
927 | case NETDEV_CHANGE: | |
928 | list_for_each_entry(vlan, &port->vlans, list) | |
fc4a7489 PM |
929 | netif_stacked_transfer_operstate(vlan->lowerdev, |
930 | vlan->dev); | |
b863ceb7 PM |
931 | break; |
932 | case NETDEV_FEAT_CHANGE: | |
933 | list_for_each_entry(vlan, &port->vlans, list) { | |
934 | vlan->dev->features = dev->features & MACVLAN_FEATURES; | |
8c2acc53 | 935 | vlan->dev->gso_max_size = dev->gso_max_size; |
b863ceb7 PM |
936 | netdev_features_change(vlan->dev); |
937 | } | |
938 | break; | |
939 | case NETDEV_UNREGISTER: | |
3b27e105 DL |
940 | /* twiddle thumbs on netns device moves */ |
941 | if (dev->reg_state != NETREG_UNREGISTERING) | |
942 | break; | |
943 | ||
b863ceb7 | 944 | list_for_each_entry_safe(vlan, next, &port->vlans, list) |
226bd341 ED |
945 | vlan->dev->rtnl_link_ops->dellink(vlan->dev, &list_kill); |
946 | unregister_netdevice_many(&list_kill); | |
947 | list_del(&list_kill); | |
b863ceb7 | 948 | break; |
1c01fe14 JP |
949 | case NETDEV_PRE_TYPE_CHANGE: |
950 | /* Forbid underlaying device to change its type. */ | |
951 | return NOTIFY_BAD; | |
b863ceb7 PM |
952 | } |
953 | return NOTIFY_DONE; | |
954 | } | |
955 | ||
956 | static struct notifier_block macvlan_notifier_block __read_mostly = { | |
957 | .notifier_call = macvlan_device_event, | |
958 | }; | |
959 | ||
960 | static int __init macvlan_init_module(void) | |
961 | { | |
962 | int err; | |
963 | ||
964 | register_netdevice_notifier(&macvlan_notifier_block); | |
b863ceb7 | 965 | |
fc0663d6 | 966 | err = macvlan_link_register(&macvlan_link_ops); |
b863ceb7 PM |
967 | if (err < 0) |
968 | goto err1; | |
969 | return 0; | |
970 | err1: | |
b863ceb7 PM |
971 | unregister_netdevice_notifier(&macvlan_notifier_block); |
972 | return err; | |
973 | } | |
974 | ||
975 | static void __exit macvlan_cleanup_module(void) | |
976 | { | |
977 | rtnl_link_unregister(&macvlan_link_ops); | |
b863ceb7 PM |
978 | unregister_netdevice_notifier(&macvlan_notifier_block); |
979 | } | |
980 | ||
981 | module_init(macvlan_init_module); | |
982 | module_exit(macvlan_cleanup_module); | |
983 | ||
984 | MODULE_LICENSE("GPL"); | |
985 | MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>"); | |
986 | MODULE_DESCRIPTION("Driver for MAC address based VLANs"); | |
987 | MODULE_ALIAS_RTNL_LINK("macvlan"); |