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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 | ||
e052f7e6 ED |
49 | static struct macvlan_port *macvlan_port_get_rcu(const struct net_device *dev) |
50 | { | |
51 | return rcu_dereference(dev->rx_handler_data); | |
52 | } | |
53 | ||
54 | static struct macvlan_port *macvlan_port_get_rtnl(const struct net_device *dev) | |
55 | { | |
56 | return rtnl_dereference(dev->rx_handler_data); | |
57 | } | |
58 | ||
a35e2c1b JP |
59 | #define macvlan_port_exists(dev) (dev->priv_flags & IFF_MACVLAN_PORT) |
60 | ||
b863ceb7 PM |
61 | static struct macvlan_dev *macvlan_hash_lookup(const struct macvlan_port *port, |
62 | const unsigned char *addr) | |
63 | { | |
64 | struct macvlan_dev *vlan; | |
b863ceb7 | 65 | |
b67bfe0d | 66 | hlist_for_each_entry_rcu(vlan, &port->vlan_hash[addr[5]], hlist) { |
a6700db1 | 67 | if (ether_addr_equal_64bits(vlan->dev->dev_addr, addr)) |
b863ceb7 PM |
68 | return vlan; |
69 | } | |
70 | return NULL; | |
71 | } | |
72 | ||
f9ac30f0 EB |
73 | static void macvlan_hash_add(struct macvlan_dev *vlan) |
74 | { | |
75 | struct macvlan_port *port = vlan->port; | |
76 | const unsigned char *addr = vlan->dev->dev_addr; | |
77 | ||
78 | hlist_add_head_rcu(&vlan->hlist, &port->vlan_hash[addr[5]]); | |
79 | } | |
80 | ||
449f4544 | 81 | static void macvlan_hash_del(struct macvlan_dev *vlan, bool sync) |
f9ac30f0 EB |
82 | { |
83 | hlist_del_rcu(&vlan->hlist); | |
449f4544 ED |
84 | if (sync) |
85 | synchronize_rcu(); | |
f9ac30f0 EB |
86 | } |
87 | ||
88 | static void macvlan_hash_change_addr(struct macvlan_dev *vlan, | |
89 | const unsigned char *addr) | |
90 | { | |
449f4544 | 91 | macvlan_hash_del(vlan, true); |
f9ac30f0 EB |
92 | /* Now that we are unhashed it is safe to change the device |
93 | * address without confusing packet delivery. | |
94 | */ | |
95 | memcpy(vlan->dev->dev_addr, addr, ETH_ALEN); | |
96 | macvlan_hash_add(vlan); | |
97 | } | |
98 | ||
99 | static int macvlan_addr_busy(const struct macvlan_port *port, | |
100 | const unsigned char *addr) | |
101 | { | |
102 | /* Test to see if the specified multicast address is | |
103 | * currently in use by the underlying device or | |
104 | * another macvlan. | |
105 | */ | |
a6700db1 | 106 | if (ether_addr_equal_64bits(port->dev->dev_addr, addr)) |
f9ac30f0 EB |
107 | return 1; |
108 | ||
109 | if (macvlan_hash_lookup(port, addr)) | |
110 | return 1; | |
111 | ||
112 | return 0; | |
113 | } | |
114 | ||
a1e514c5 | 115 | |
fc0663d6 AB |
116 | static int macvlan_broadcast_one(struct sk_buff *skb, |
117 | const struct macvlan_dev *vlan, | |
618e1b74 | 118 | const struct ethhdr *eth, bool local) |
a1e514c5 | 119 | { |
fc0663d6 | 120 | struct net_device *dev = vlan->dev; |
a1e514c5 AB |
121 | if (!skb) |
122 | return NET_RX_DROP; | |
123 | ||
618e1b74 | 124 | if (local) |
fc0663d6 | 125 | return vlan->forward(dev, skb); |
618e1b74 | 126 | |
a1e514c5 | 127 | skb->dev = dev; |
a6700db1 | 128 | if (ether_addr_equal_64bits(eth->h_dest, dev->broadcast)) |
a1e514c5 AB |
129 | skb->pkt_type = PACKET_BROADCAST; |
130 | else | |
131 | skb->pkt_type = PACKET_MULTICAST; | |
132 | ||
fc0663d6 | 133 | return vlan->receive(skb); |
a1e514c5 AB |
134 | } |
135 | ||
3807ff58 ED |
136 | static u32 macvlan_hash_mix(const struct macvlan_dev *vlan) |
137 | { | |
138 | return (u32)(((unsigned long)vlan) >> L1_CACHE_SHIFT); | |
139 | } | |
140 | ||
141 | ||
142 | static unsigned int mc_hash(const struct macvlan_dev *vlan, | |
143 | const unsigned char *addr) | |
cd431e73 ED |
144 | { |
145 | u32 val = __get_unaligned_cpu32(addr + 2); | |
146 | ||
3807ff58 | 147 | val ^= macvlan_hash_mix(vlan); |
cd431e73 ED |
148 | return hash_32(val, MACVLAN_MC_FILTER_BITS); |
149 | } | |
150 | ||
b863ceb7 | 151 | static void macvlan_broadcast(struct sk_buff *skb, |
618e1b74 AB |
152 | const struct macvlan_port *port, |
153 | struct net_device *src, | |
154 | enum macvlan_mode mode) | |
b863ceb7 PM |
155 | { |
156 | const struct ethhdr *eth = eth_hdr(skb); | |
157 | const struct macvlan_dev *vlan; | |
b863ceb7 PM |
158 | struct sk_buff *nskb; |
159 | unsigned int i; | |
a1e514c5 | 160 | int err; |
3807ff58 | 161 | unsigned int hash; |
b863ceb7 | 162 | |
efbbced3 PM |
163 | if (skb->protocol == htons(ETH_P_PAUSE)) |
164 | return; | |
165 | ||
b863ceb7 | 166 | for (i = 0; i < MACVLAN_HASH_SIZE; i++) { |
b67bfe0d | 167 | hlist_for_each_entry_rcu(vlan, &port->vlan_hash[i], hlist) { |
618e1b74 AB |
168 | if (vlan->dev == src || !(vlan->mode & mode)) |
169 | continue; | |
170 | ||
3807ff58 | 171 | hash = mc_hash(vlan, eth->h_dest); |
cd431e73 ED |
172 | if (!test_bit(hash, vlan->mc_filter)) |
173 | continue; | |
b863ceb7 | 174 | nskb = skb_clone(skb, GFP_ATOMIC); |
fc0663d6 | 175 | err = macvlan_broadcast_one(nskb, vlan, eth, |
618e1b74 | 176 | mode == MACVLAN_MODE_BRIDGE); |
a1e514c5 AB |
177 | macvlan_count_rx(vlan, skb->len + ETH_HLEN, |
178 | err == NET_RX_SUCCESS, 1); | |
b863ceb7 PM |
179 | } |
180 | } | |
181 | } | |
182 | ||
183 | /* called under rcu_read_lock() from netif_receive_skb */ | |
8a4eb573 | 184 | static rx_handler_result_t macvlan_handle_frame(struct sk_buff **pskb) |
b863ceb7 | 185 | { |
ab95bfe0 | 186 | struct macvlan_port *port; |
8a4eb573 | 187 | struct sk_buff *skb = *pskb; |
b863ceb7 | 188 | const struct ethhdr *eth = eth_hdr(skb); |
b863ceb7 | 189 | const struct macvlan_dev *vlan; |
618e1b74 | 190 | const struct macvlan_dev *src; |
b863ceb7 | 191 | struct net_device *dev; |
ba01877f SS |
192 | unsigned int len = 0; |
193 | int ret = NET_RX_DROP; | |
b863ceb7 | 194 | |
a35e2c1b | 195 | port = macvlan_port_get_rcu(skb->dev); |
b863ceb7 | 196 | if (is_multicast_ether_addr(eth->h_dest)) { |
bc416d97 ED |
197 | skb = ip_check_defrag(skb, IP_DEFRAG_MACVLAN); |
198 | if (!skb) | |
199 | return RX_HANDLER_CONSUMED; | |
4ec7ac12 | 200 | eth = eth_hdr(skb); |
618e1b74 AB |
201 | src = macvlan_hash_lookup(port, eth->h_source); |
202 | if (!src) | |
203 | /* frame comes from an external address */ | |
204 | macvlan_broadcast(skb, port, NULL, | |
205 | MACVLAN_MODE_PRIVATE | | |
206 | MACVLAN_MODE_VEPA | | |
eb06acdc | 207 | MACVLAN_MODE_PASSTHRU| |
618e1b74 AB |
208 | MACVLAN_MODE_BRIDGE); |
209 | else if (src->mode == MACVLAN_MODE_VEPA) | |
210 | /* flood to everyone except source */ | |
211 | macvlan_broadcast(skb, port, src->dev, | |
212 | MACVLAN_MODE_VEPA | | |
213 | MACVLAN_MODE_BRIDGE); | |
214 | else if (src->mode == MACVLAN_MODE_BRIDGE) | |
215 | /* | |
216 | * flood only to VEPA ports, bridge ports | |
217 | * already saw the frame on the way out. | |
218 | */ | |
219 | macvlan_broadcast(skb, port, src->dev, | |
220 | MACVLAN_MODE_VEPA); | |
729e72a1 | 221 | else { |
222 | /* forward to original port. */ | |
223 | vlan = src; | |
224 | ret = macvlan_broadcast_one(skb, vlan, eth, 0); | |
225 | goto out; | |
226 | } | |
227 | ||
8a4eb573 | 228 | return RX_HANDLER_PASS; |
b863ceb7 PM |
229 | } |
230 | ||
eb06acdc SS |
231 | if (port->passthru) |
232 | vlan = list_first_entry(&port->vlans, struct macvlan_dev, list); | |
233 | else | |
234 | vlan = macvlan_hash_lookup(port, eth->h_dest); | |
b863ceb7 | 235 | if (vlan == NULL) |
8a4eb573 | 236 | return RX_HANDLER_PASS; |
b863ceb7 PM |
237 | |
238 | dev = vlan->dev; | |
239 | if (unlikely(!(dev->flags & IFF_UP))) { | |
240 | kfree_skb(skb); | |
8a4eb573 | 241 | return RX_HANDLER_CONSUMED; |
b863ceb7 | 242 | } |
a1e514c5 | 243 | len = skb->len + ETH_HLEN; |
b863ceb7 | 244 | skb = skb_share_check(skb, GFP_ATOMIC); |
a1e514c5 | 245 | if (!skb) |
ba01877f | 246 | goto out; |
b863ceb7 PM |
247 | |
248 | skb->dev = dev; | |
249 | skb->pkt_type = PACKET_HOST; | |
250 | ||
ba01877f SS |
251 | ret = vlan->receive(skb); |
252 | ||
253 | out: | |
254 | macvlan_count_rx(vlan, len, ret == NET_RX_SUCCESS, 0); | |
8a4eb573 | 255 | return RX_HANDLER_CONSUMED; |
b863ceb7 PM |
256 | } |
257 | ||
618e1b74 AB |
258 | static int macvlan_queue_xmit(struct sk_buff *skb, struct net_device *dev) |
259 | { | |
260 | const struct macvlan_dev *vlan = netdev_priv(dev); | |
261 | const struct macvlan_port *port = vlan->port; | |
262 | const struct macvlan_dev *dest; | |
12a2856b | 263 | __u8 ip_summed = skb->ip_summed; |
618e1b74 AB |
264 | |
265 | if (vlan->mode == MACVLAN_MODE_BRIDGE) { | |
266 | const struct ethhdr *eth = (void *)skb->data; | |
12a2856b | 267 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
618e1b74 AB |
268 | |
269 | /* send to other bridge ports directly */ | |
270 | if (is_multicast_ether_addr(eth->h_dest)) { | |
271 | macvlan_broadcast(skb, port, dev, MACVLAN_MODE_BRIDGE); | |
272 | goto xmit_world; | |
273 | } | |
274 | ||
275 | dest = macvlan_hash_lookup(port, eth->h_dest); | |
276 | if (dest && dest->mode == MACVLAN_MODE_BRIDGE) { | |
a37dd333 | 277 | /* send to lowerdev first for its network taps */ |
cb2d0f3e | 278 | dev_forward_skb(vlan->lowerdev, skb); |
618e1b74 AB |
279 | |
280 | return NET_XMIT_SUCCESS; | |
281 | } | |
282 | } | |
283 | ||
284 | xmit_world: | |
12a2856b | 285 | skb->ip_summed = ip_summed; |
59b9997b | 286 | skb->dev = vlan->lowerdev; |
618e1b74 AB |
287 | return dev_queue_xmit(skb); |
288 | } | |
289 | ||
fc0663d6 AB |
290 | netdev_tx_t macvlan_start_xmit(struct sk_buff *skb, |
291 | struct net_device *dev) | |
b863ceb7 | 292 | { |
b863ceb7 PM |
293 | unsigned int len = skb->len; |
294 | int ret; | |
8ffab51b | 295 | const struct macvlan_dev *vlan = netdev_priv(dev); |
b863ceb7 | 296 | |
618e1b74 | 297 | ret = macvlan_queue_xmit(skb, dev); |
2d6c9ffc | 298 | if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) { |
8ffab51b | 299 | struct macvlan_pcpu_stats *pcpu_stats; |
2c114553 | 300 | |
8ffab51b ED |
301 | pcpu_stats = this_cpu_ptr(vlan->pcpu_stats); |
302 | u64_stats_update_begin(&pcpu_stats->syncp); | |
303 | pcpu_stats->tx_packets++; | |
304 | pcpu_stats->tx_bytes += len; | |
305 | u64_stats_update_end(&pcpu_stats->syncp); | |
306 | } else { | |
307 | this_cpu_inc(vlan->pcpu_stats->tx_dropped); | |
308 | } | |
cbbef5e1 | 309 | return ret; |
b863ceb7 | 310 | } |
fc0663d6 | 311 | EXPORT_SYMBOL_GPL(macvlan_start_xmit); |
b863ceb7 PM |
312 | |
313 | static int macvlan_hard_header(struct sk_buff *skb, struct net_device *dev, | |
3b04ddde SH |
314 | unsigned short type, const void *daddr, |
315 | const void *saddr, unsigned len) | |
b863ceb7 PM |
316 | { |
317 | const struct macvlan_dev *vlan = netdev_priv(dev); | |
318 | struct net_device *lowerdev = vlan->lowerdev; | |
319 | ||
0c4e8581 SH |
320 | return dev_hard_header(skb, lowerdev, type, daddr, |
321 | saddr ? : dev->dev_addr, len); | |
b863ceb7 PM |
322 | } |
323 | ||
3b04ddde SH |
324 | static const struct header_ops macvlan_hard_header_ops = { |
325 | .create = macvlan_hard_header, | |
326 | .rebuild = eth_rebuild_header, | |
327 | .parse = eth_header_parse, | |
3b04ddde SH |
328 | .cache = eth_header_cache, |
329 | .cache_update = eth_header_cache_update, | |
330 | }; | |
331 | ||
b863ceb7 PM |
332 | static int macvlan_open(struct net_device *dev) |
333 | { | |
334 | struct macvlan_dev *vlan = netdev_priv(dev); | |
b863ceb7 PM |
335 | struct net_device *lowerdev = vlan->lowerdev; |
336 | int err; | |
337 | ||
eb06acdc | 338 | if (vlan->port->passthru) { |
df8ef8f3 JF |
339 | if (!(vlan->flags & MACVLAN_FLAG_NOPROMISC)) |
340 | dev_set_promiscuity(lowerdev, 1); | |
eb06acdc SS |
341 | goto hash_add; |
342 | } | |
343 | ||
f9ac30f0 EB |
344 | err = -EBUSY; |
345 | if (macvlan_addr_busy(vlan->port, dev->dev_addr)) | |
346 | goto out; | |
347 | ||
a748ee24 | 348 | err = dev_uc_add(lowerdev, dev->dev_addr); |
b863ceb7 | 349 | if (err < 0) |
b89fb7da WC |
350 | goto out; |
351 | if (dev->flags & IFF_ALLMULTI) { | |
352 | err = dev_set_allmulti(lowerdev, 1); | |
353 | if (err < 0) | |
354 | goto del_unicast; | |
355 | } | |
eb06acdc SS |
356 | |
357 | hash_add: | |
f9ac30f0 | 358 | macvlan_hash_add(vlan); |
b863ceb7 | 359 | return 0; |
b89fb7da WC |
360 | |
361 | del_unicast: | |
a748ee24 | 362 | dev_uc_del(lowerdev, dev->dev_addr); |
b89fb7da WC |
363 | out: |
364 | return err; | |
b863ceb7 PM |
365 | } |
366 | ||
367 | static int macvlan_stop(struct net_device *dev) | |
368 | { | |
369 | struct macvlan_dev *vlan = netdev_priv(dev); | |
370 | struct net_device *lowerdev = vlan->lowerdev; | |
371 | ||
df8ef8f3 JF |
372 | dev_uc_unsync(lowerdev, dev); |
373 | dev_mc_unsync(lowerdev, dev); | |
374 | ||
eb06acdc | 375 | if (vlan->port->passthru) { |
df8ef8f3 JF |
376 | if (!(vlan->flags & MACVLAN_FLAG_NOPROMISC)) |
377 | dev_set_promiscuity(lowerdev, -1); | |
eb06acdc SS |
378 | goto hash_del; |
379 | } | |
380 | ||
b863ceb7 PM |
381 | if (dev->flags & IFF_ALLMULTI) |
382 | dev_set_allmulti(lowerdev, -1); | |
383 | ||
a748ee24 | 384 | dev_uc_del(lowerdev, dev->dev_addr); |
b863ceb7 | 385 | |
eb06acdc | 386 | hash_del: |
449f4544 | 387 | macvlan_hash_del(vlan, !dev->dismantle); |
b863ceb7 PM |
388 | return 0; |
389 | } | |
390 | ||
ad5d20a6 PM |
391 | static int macvlan_set_mac_address(struct net_device *dev, void *p) |
392 | { | |
393 | struct macvlan_dev *vlan = netdev_priv(dev); | |
394 | struct net_device *lowerdev = vlan->lowerdev; | |
395 | struct sockaddr *addr = p; | |
396 | int err; | |
397 | ||
398 | if (!is_valid_ether_addr(addr->sa_data)) | |
399 | return -EADDRNOTAVAIL; | |
400 | ||
f9ac30f0 EB |
401 | if (!(dev->flags & IFF_UP)) { |
402 | /* Just copy in the new address */ | |
403 | memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN); | |
404 | } else { | |
405 | /* Rehash and update the device filters */ | |
406 | if (macvlan_addr_busy(vlan->port, addr->sa_data)) | |
407 | return -EBUSY; | |
ad5d20a6 | 408 | |
a748ee24 | 409 | err = dev_uc_add(lowerdev, addr->sa_data); |
ccffad25 | 410 | if (err) |
f9ac30f0 | 411 | return err; |
ad5d20a6 | 412 | |
a748ee24 | 413 | dev_uc_del(lowerdev, dev->dev_addr); |
f9ac30f0 EB |
414 | |
415 | macvlan_hash_change_addr(vlan, addr->sa_data); | |
416 | } | |
ad5d20a6 PM |
417 | return 0; |
418 | } | |
419 | ||
b863ceb7 PM |
420 | static void macvlan_change_rx_flags(struct net_device *dev, int change) |
421 | { | |
422 | struct macvlan_dev *vlan = netdev_priv(dev); | |
423 | struct net_device *lowerdev = vlan->lowerdev; | |
424 | ||
425 | if (change & IFF_ALLMULTI) | |
426 | dev_set_allmulti(lowerdev, dev->flags & IFF_ALLMULTI ? 1 : -1); | |
427 | } | |
428 | ||
df8ef8f3 | 429 | static void macvlan_set_mac_lists(struct net_device *dev) |
b863ceb7 PM |
430 | { |
431 | struct macvlan_dev *vlan = netdev_priv(dev); | |
432 | ||
cd431e73 ED |
433 | if (dev->flags & (IFF_PROMISC | IFF_ALLMULTI)) { |
434 | bitmap_fill(vlan->mc_filter, MACVLAN_MC_FILTER_SZ); | |
435 | } else { | |
436 | struct netdev_hw_addr *ha; | |
437 | DECLARE_BITMAP(filter, MACVLAN_MC_FILTER_SZ); | |
438 | ||
439 | bitmap_zero(filter, MACVLAN_MC_FILTER_SZ); | |
440 | netdev_for_each_mc_addr(ha, dev) { | |
3807ff58 | 441 | __set_bit(mc_hash(vlan, ha->addr), filter); |
cd431e73 | 442 | } |
d5270430 | 443 | |
3807ff58 | 444 | __set_bit(mc_hash(vlan, dev->broadcast), filter); |
d5270430 | 445 | |
cd431e73 ED |
446 | bitmap_copy(vlan->mc_filter, filter, MACVLAN_MC_FILTER_SZ); |
447 | } | |
df8ef8f3 | 448 | dev_uc_sync(vlan->lowerdev, dev); |
b863ceb7 PM |
449 | dev_mc_sync(vlan->lowerdev, dev); |
450 | } | |
451 | ||
452 | static int macvlan_change_mtu(struct net_device *dev, int new_mtu) | |
453 | { | |
454 | struct macvlan_dev *vlan = netdev_priv(dev); | |
455 | ||
456 | if (new_mtu < 68 || vlan->lowerdev->mtu < new_mtu) | |
457 | return -EINVAL; | |
458 | dev->mtu = new_mtu; | |
459 | return 0; | |
460 | } | |
461 | ||
462 | /* | |
463 | * macvlan network devices have devices nesting below it and are a special | |
464 | * "super class" of normal network devices; split their locks off into a | |
465 | * separate class since they always nest. | |
466 | */ | |
467 | static struct lock_class_key macvlan_netdev_xmit_lock_key; | |
cf508b12 | 468 | static struct lock_class_key macvlan_netdev_addr_lock_key; |
b863ceb7 PM |
469 | |
470 | #define MACVLAN_FEATURES \ | |
471 | (NETIF_F_SG | NETIF_F_ALL_CSUM | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST | \ | |
472 | NETIF_F_GSO | NETIF_F_TSO | NETIF_F_UFO | NETIF_F_GSO_ROBUST | \ | |
8d13e670 | 473 | NETIF_F_TSO_ECN | NETIF_F_TSO6 | NETIF_F_GRO | NETIF_F_RXCSUM | \ |
f646968f | 474 | NETIF_F_HW_VLAN_CTAG_FILTER) |
b863ceb7 PM |
475 | |
476 | #define MACVLAN_STATE_MASK \ | |
477 | ((1<<__LINK_STATE_NOCARRIER) | (1<<__LINK_STATE_DORMANT)) | |
478 | ||
e8a0464c DM |
479 | static void macvlan_set_lockdep_class_one(struct net_device *dev, |
480 | struct netdev_queue *txq, | |
481 | void *_unused) | |
c773e847 DM |
482 | { |
483 | lockdep_set_class(&txq->_xmit_lock, | |
484 | &macvlan_netdev_xmit_lock_key); | |
485 | } | |
486 | ||
487 | static void macvlan_set_lockdep_class(struct net_device *dev) | |
488 | { | |
cf508b12 DM |
489 | lockdep_set_class(&dev->addr_list_lock, |
490 | &macvlan_netdev_addr_lock_key); | |
e8a0464c | 491 | netdev_for_each_tx_queue(dev, macvlan_set_lockdep_class_one, NULL); |
c773e847 DM |
492 | } |
493 | ||
b863ceb7 PM |
494 | static int macvlan_init(struct net_device *dev) |
495 | { | |
496 | struct macvlan_dev *vlan = netdev_priv(dev); | |
497 | const struct net_device *lowerdev = vlan->lowerdev; | |
498 | ||
499 | dev->state = (dev->state & ~MACVLAN_STATE_MASK) | | |
500 | (lowerdev->state & MACVLAN_STATE_MASK); | |
501 | dev->features = lowerdev->features & MACVLAN_FEATURES; | |
8ffab51b | 502 | dev->features |= NETIF_F_LLTX; |
8c2acc53 | 503 | dev->gso_max_size = lowerdev->gso_max_size; |
b863ceb7 | 504 | dev->iflink = lowerdev->ifindex; |
ef5c8996 | 505 | dev->hard_header_len = lowerdev->hard_header_len; |
b863ceb7 | 506 | |
c773e847 DM |
507 | macvlan_set_lockdep_class(dev); |
508 | ||
8ffab51b ED |
509 | vlan->pcpu_stats = alloc_percpu(struct macvlan_pcpu_stats); |
510 | if (!vlan->pcpu_stats) | |
fccaf710 ED |
511 | return -ENOMEM; |
512 | ||
b863ceb7 PM |
513 | return 0; |
514 | } | |
515 | ||
fccaf710 ED |
516 | static void macvlan_uninit(struct net_device *dev) |
517 | { | |
518 | struct macvlan_dev *vlan = netdev_priv(dev); | |
d5cd9244 | 519 | struct macvlan_port *port = vlan->port; |
fccaf710 | 520 | |
8ffab51b | 521 | free_percpu(vlan->pcpu_stats); |
d5cd9244 EB |
522 | |
523 | port->count -= 1; | |
524 | if (!port->count) | |
525 | macvlan_port_destroy(port->dev); | |
fccaf710 ED |
526 | } |
527 | ||
28172739 ED |
528 | static struct rtnl_link_stats64 *macvlan_dev_get_stats64(struct net_device *dev, |
529 | struct rtnl_link_stats64 *stats) | |
fccaf710 | 530 | { |
fccaf710 ED |
531 | struct macvlan_dev *vlan = netdev_priv(dev); |
532 | ||
8ffab51b ED |
533 | if (vlan->pcpu_stats) { |
534 | struct macvlan_pcpu_stats *p; | |
535 | u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes; | |
536 | u32 rx_errors = 0, tx_dropped = 0; | |
bc66154e | 537 | unsigned int start; |
fccaf710 ED |
538 | int i; |
539 | ||
540 | for_each_possible_cpu(i) { | |
8ffab51b | 541 | p = per_cpu_ptr(vlan->pcpu_stats, i); |
bc66154e ED |
542 | do { |
543 | start = u64_stats_fetch_begin_bh(&p->syncp); | |
544 | rx_packets = p->rx_packets; | |
545 | rx_bytes = p->rx_bytes; | |
546 | rx_multicast = p->rx_multicast; | |
8ffab51b ED |
547 | tx_packets = p->tx_packets; |
548 | tx_bytes = p->tx_bytes; | |
bc66154e | 549 | } while (u64_stats_fetch_retry_bh(&p->syncp, start)); |
8ffab51b ED |
550 | |
551 | stats->rx_packets += rx_packets; | |
552 | stats->rx_bytes += rx_bytes; | |
553 | stats->multicast += rx_multicast; | |
554 | stats->tx_packets += tx_packets; | |
555 | stats->tx_bytes += tx_bytes; | |
556 | /* rx_errors & tx_dropped are u32, updated | |
557 | * without syncp protection. | |
558 | */ | |
559 | rx_errors += p->rx_errors; | |
560 | tx_dropped += p->tx_dropped; | |
fccaf710 | 561 | } |
8ffab51b ED |
562 | stats->rx_errors = rx_errors; |
563 | stats->rx_dropped = rx_errors; | |
564 | stats->tx_dropped = tx_dropped; | |
fccaf710 ED |
565 | } |
566 | return stats; | |
567 | } | |
568 | ||
8e586137 | 569 | static int macvlan_vlan_rx_add_vid(struct net_device *dev, |
80d5c368 | 570 | __be16 proto, u16 vid) |
8d13e670 JF |
571 | { |
572 | struct macvlan_dev *vlan = netdev_priv(dev); | |
573 | struct net_device *lowerdev = vlan->lowerdev; | |
8d13e670 | 574 | |
80d5c368 | 575 | return vlan_vid_add(lowerdev, proto, vid); |
8d13e670 JF |
576 | } |
577 | ||
8e586137 | 578 | static int macvlan_vlan_rx_kill_vid(struct net_device *dev, |
80d5c368 | 579 | __be16 proto, u16 vid) |
8d13e670 JF |
580 | { |
581 | struct macvlan_dev *vlan = netdev_priv(dev); | |
582 | struct net_device *lowerdev = vlan->lowerdev; | |
8d13e670 | 583 | |
80d5c368 | 584 | vlan_vid_del(lowerdev, proto, vid); |
8e586137 | 585 | return 0; |
8d13e670 JF |
586 | } |
587 | ||
edc7d573 | 588 | static int macvlan_fdb_add(struct ndmsg *ndm, struct nlattr *tb[], |
df8ef8f3 | 589 | struct net_device *dev, |
6b6e2725 | 590 | const unsigned char *addr, |
df8ef8f3 JF |
591 | u16 flags) |
592 | { | |
593 | struct macvlan_dev *vlan = netdev_priv(dev); | |
594 | int err = -EINVAL; | |
595 | ||
596 | if (!vlan->port->passthru) | |
597 | return -EOPNOTSUPP; | |
598 | ||
599 | if (is_unicast_ether_addr(addr)) | |
600 | err = dev_uc_add_excl(dev, addr); | |
601 | else if (is_multicast_ether_addr(addr)) | |
602 | err = dev_mc_add_excl(dev, addr); | |
603 | ||
604 | return err; | |
605 | } | |
606 | ||
1690be63 | 607 | static int macvlan_fdb_del(struct ndmsg *ndm, struct nlattr *tb[], |
df8ef8f3 | 608 | struct net_device *dev, |
6b6e2725 | 609 | const unsigned char *addr) |
df8ef8f3 JF |
610 | { |
611 | struct macvlan_dev *vlan = netdev_priv(dev); | |
612 | int err = -EINVAL; | |
613 | ||
614 | if (!vlan->port->passthru) | |
615 | return -EOPNOTSUPP; | |
616 | ||
617 | if (is_unicast_ether_addr(addr)) | |
618 | err = dev_uc_del(dev, addr); | |
619 | else if (is_multicast_ether_addr(addr)) | |
620 | err = dev_mc_del(dev, addr); | |
621 | ||
622 | return err; | |
623 | } | |
624 | ||
b863ceb7 PM |
625 | static void macvlan_ethtool_get_drvinfo(struct net_device *dev, |
626 | struct ethtool_drvinfo *drvinfo) | |
627 | { | |
7826d43f JP |
628 | strlcpy(drvinfo->driver, "macvlan", sizeof(drvinfo->driver)); |
629 | strlcpy(drvinfo->version, "0.1", sizeof(drvinfo->version)); | |
b863ceb7 PM |
630 | } |
631 | ||
9edb8bb6 SH |
632 | static int macvlan_ethtool_get_settings(struct net_device *dev, |
633 | struct ethtool_cmd *cmd) | |
634 | { | |
635 | const struct macvlan_dev *vlan = netdev_priv(dev); | |
4bc71cb9 JP |
636 | |
637 | return __ethtool_get_settings(vlan->lowerdev, cmd); | |
9edb8bb6 SH |
638 | } |
639 | ||
b863ceb7 PM |
640 | static const struct ethtool_ops macvlan_ethtool_ops = { |
641 | .get_link = ethtool_op_get_link, | |
9edb8bb6 | 642 | .get_settings = macvlan_ethtool_get_settings, |
b863ceb7 PM |
643 | .get_drvinfo = macvlan_ethtool_get_drvinfo, |
644 | }; | |
645 | ||
54a30c97 SH |
646 | static const struct net_device_ops macvlan_netdev_ops = { |
647 | .ndo_init = macvlan_init, | |
fccaf710 | 648 | .ndo_uninit = macvlan_uninit, |
54a30c97 SH |
649 | .ndo_open = macvlan_open, |
650 | .ndo_stop = macvlan_stop, | |
00829823 | 651 | .ndo_start_xmit = macvlan_start_xmit, |
54a30c97 SH |
652 | .ndo_change_mtu = macvlan_change_mtu, |
653 | .ndo_change_rx_flags = macvlan_change_rx_flags, | |
654 | .ndo_set_mac_address = macvlan_set_mac_address, | |
df8ef8f3 | 655 | .ndo_set_rx_mode = macvlan_set_mac_lists, |
bc66154e | 656 | .ndo_get_stats64 = macvlan_dev_get_stats64, |
54a30c97 | 657 | .ndo_validate_addr = eth_validate_addr, |
8d13e670 JF |
658 | .ndo_vlan_rx_add_vid = macvlan_vlan_rx_add_vid, |
659 | .ndo_vlan_rx_kill_vid = macvlan_vlan_rx_kill_vid, | |
df8ef8f3 JF |
660 | .ndo_fdb_add = macvlan_fdb_add, |
661 | .ndo_fdb_del = macvlan_fdb_del, | |
662 | .ndo_fdb_dump = ndo_dflt_fdb_dump, | |
54a30c97 SH |
663 | }; |
664 | ||
8a35747a | 665 | void macvlan_common_setup(struct net_device *dev) |
b863ceb7 PM |
666 | { |
667 | ether_setup(dev); | |
668 | ||
550fd08c | 669 | dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING); |
87ab7f6f | 670 | dev->priv_flags |= IFF_UNICAST_FLT; |
54a30c97 | 671 | dev->netdev_ops = &macvlan_netdev_ops; |
b863ceb7 | 672 | dev->destructor = free_netdev; |
3b04ddde | 673 | dev->header_ops = &macvlan_hard_header_ops, |
b863ceb7 | 674 | dev->ethtool_ops = &macvlan_ethtool_ops; |
8a35747a HX |
675 | } |
676 | EXPORT_SYMBOL_GPL(macvlan_common_setup); | |
677 | ||
678 | static void macvlan_setup(struct net_device *dev) | |
679 | { | |
680 | macvlan_common_setup(dev); | |
b863ceb7 PM |
681 | dev->tx_queue_len = 0; |
682 | } | |
683 | ||
684 | static int macvlan_port_create(struct net_device *dev) | |
685 | { | |
686 | struct macvlan_port *port; | |
687 | unsigned int i; | |
ab95bfe0 | 688 | int err; |
b863ceb7 PM |
689 | |
690 | if (dev->type != ARPHRD_ETHER || dev->flags & IFF_LOOPBACK) | |
691 | return -EINVAL; | |
692 | ||
693 | port = kzalloc(sizeof(*port), GFP_KERNEL); | |
694 | if (port == NULL) | |
695 | return -ENOMEM; | |
696 | ||
eb06acdc | 697 | port->passthru = false; |
b863ceb7 PM |
698 | port->dev = dev; |
699 | INIT_LIST_HEAD(&port->vlans); | |
700 | for (i = 0; i < MACVLAN_HASH_SIZE; i++) | |
701 | INIT_HLIST_HEAD(&port->vlan_hash[i]); | |
ab95bfe0 | 702 | |
a35e2c1b JP |
703 | err = netdev_rx_handler_register(dev, macvlan_handle_frame, port); |
704 | if (err) | |
ab95bfe0 | 705 | kfree(port); |
d9351561 ED |
706 | else |
707 | dev->priv_flags |= IFF_MACVLAN_PORT; | |
ab95bfe0 | 708 | return err; |
b863ceb7 PM |
709 | } |
710 | ||
711 | static void macvlan_port_destroy(struct net_device *dev) | |
712 | { | |
e052f7e6 | 713 | struct macvlan_port *port = macvlan_port_get_rtnl(dev); |
b863ceb7 | 714 | |
a35e2c1b | 715 | dev->priv_flags &= ~IFF_MACVLAN_PORT; |
ab95bfe0 | 716 | netdev_rx_handler_unregister(dev); |
6e070aec | 717 | kfree_rcu(port, rcu); |
b863ceb7 PM |
718 | } |
719 | ||
b863ceb7 PM |
720 | static int macvlan_validate(struct nlattr *tb[], struct nlattr *data[]) |
721 | { | |
722 | if (tb[IFLA_ADDRESS]) { | |
723 | if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) | |
724 | return -EINVAL; | |
725 | if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) | |
726 | return -EADDRNOTAVAIL; | |
727 | } | |
27c0b1a8 AB |
728 | |
729 | if (data && data[IFLA_MACVLAN_MODE]) { | |
730 | switch (nla_get_u32(data[IFLA_MACVLAN_MODE])) { | |
731 | case MACVLAN_MODE_PRIVATE: | |
732 | case MACVLAN_MODE_VEPA: | |
733 | case MACVLAN_MODE_BRIDGE: | |
eb06acdc | 734 | case MACVLAN_MODE_PASSTHRU: |
27c0b1a8 AB |
735 | break; |
736 | default: | |
737 | return -EINVAL; | |
738 | } | |
739 | } | |
b863ceb7 PM |
740 | return 0; |
741 | } | |
742 | ||
fc0663d6 AB |
743 | int macvlan_common_newlink(struct net *src_net, struct net_device *dev, |
744 | struct nlattr *tb[], struct nlattr *data[], | |
745 | int (*receive)(struct sk_buff *skb), | |
746 | int (*forward)(struct net_device *dev, | |
747 | struct sk_buff *skb)) | |
b863ceb7 PM |
748 | { |
749 | struct macvlan_dev *vlan = netdev_priv(dev); | |
750 | struct macvlan_port *port; | |
751 | struct net_device *lowerdev; | |
752 | int err; | |
753 | ||
754 | if (!tb[IFLA_LINK]) | |
755 | return -EINVAL; | |
756 | ||
81adee47 | 757 | lowerdev = __dev_get_by_index(src_net, nla_get_u32(tb[IFLA_LINK])); |
b863ceb7 PM |
758 | if (lowerdev == NULL) |
759 | return -ENODEV; | |
760 | ||
b0832a29 EB |
761 | /* When creating macvlans on top of other macvlans - use |
762 | * the real device as the lowerdev. | |
a6ca5f1d | 763 | */ |
b0832a29 EB |
764 | if (lowerdev->rtnl_link_ops == dev->rtnl_link_ops) { |
765 | struct macvlan_dev *lowervlan = netdev_priv(lowerdev); | |
766 | lowerdev = lowervlan->lowerdev; | |
767 | } | |
a6ca5f1d | 768 | |
b863ceb7 PM |
769 | if (!tb[IFLA_MTU]) |
770 | dev->mtu = lowerdev->mtu; | |
771 | else if (dev->mtu > lowerdev->mtu) | |
772 | return -EINVAL; | |
773 | ||
774 | if (!tb[IFLA_ADDRESS]) | |
7ce5d222 | 775 | eth_hw_addr_random(dev); |
b863ceb7 | 776 | |
a35e2c1b | 777 | if (!macvlan_port_exists(lowerdev)) { |
b863ceb7 PM |
778 | err = macvlan_port_create(lowerdev); |
779 | if (err < 0) | |
780 | return err; | |
781 | } | |
e052f7e6 | 782 | port = macvlan_port_get_rtnl(lowerdev); |
b863ceb7 | 783 | |
eb06acdc SS |
784 | /* Only 1 macvlan device can be created in passthru mode */ |
785 | if (port->passthru) | |
786 | return -EINVAL; | |
787 | ||
b863ceb7 PM |
788 | vlan->lowerdev = lowerdev; |
789 | vlan->dev = dev; | |
790 | vlan->port = port; | |
fc0663d6 AB |
791 | vlan->receive = receive; |
792 | vlan->forward = forward; | |
b863ceb7 | 793 | |
27c0b1a8 AB |
794 | vlan->mode = MACVLAN_MODE_VEPA; |
795 | if (data && data[IFLA_MACVLAN_MODE]) | |
796 | vlan->mode = nla_get_u32(data[IFLA_MACVLAN_MODE]); | |
797 | ||
df8ef8f3 JF |
798 | if (data && data[IFLA_MACVLAN_FLAGS]) |
799 | vlan->flags = nla_get_u16(data[IFLA_MACVLAN_FLAGS]); | |
800 | ||
eb06acdc | 801 | if (vlan->mode == MACVLAN_MODE_PASSTHRU) { |
d5cd9244 | 802 | if (port->count) |
eb06acdc SS |
803 | return -EINVAL; |
804 | port->passthru = true; | |
805 | memcpy(dev->dev_addr, lowerdev->dev_addr, ETH_ALEN); | |
806 | } | |
807 | ||
7cd43db7 JP |
808 | err = netdev_upper_dev_link(lowerdev, dev); |
809 | if (err) | |
810 | goto destroy_port; | |
811 | ||
d5cd9244 | 812 | port->count += 1; |
b863ceb7 PM |
813 | err = register_netdevice(dev); |
814 | if (err < 0) | |
7cd43db7 | 815 | goto upper_dev_unlink; |
b863ceb7 PM |
816 | |
817 | list_add_tail(&vlan->list, &port->vlans); | |
fc4a7489 | 818 | netif_stacked_transfer_operstate(lowerdev, dev); |
f16d3d57 | 819 | |
b863ceb7 | 820 | return 0; |
f16d3d57 | 821 | |
7cd43db7 JP |
822 | upper_dev_unlink: |
823 | netdev_upper_dev_unlink(lowerdev, dev); | |
f16d3d57 | 824 | destroy_port: |
d5cd9244 EB |
825 | port->count -= 1; |
826 | if (!port->count) | |
f16d3d57 JP |
827 | macvlan_port_destroy(lowerdev); |
828 | ||
829 | return err; | |
b863ceb7 | 830 | } |
fc0663d6 | 831 | EXPORT_SYMBOL_GPL(macvlan_common_newlink); |
b863ceb7 | 832 | |
fc0663d6 AB |
833 | static int macvlan_newlink(struct net *src_net, struct net_device *dev, |
834 | struct nlattr *tb[], struct nlattr *data[]) | |
835 | { | |
836 | return macvlan_common_newlink(src_net, dev, tb, data, | |
837 | netif_rx, | |
838 | dev_forward_skb); | |
839 | } | |
840 | ||
841 | void macvlan_dellink(struct net_device *dev, struct list_head *head) | |
b863ceb7 PM |
842 | { |
843 | struct macvlan_dev *vlan = netdev_priv(dev); | |
b863ceb7 PM |
844 | |
845 | list_del(&vlan->list); | |
23289a37 | 846 | unregister_netdevice_queue(dev, head); |
7cd43db7 | 847 | netdev_upper_dev_unlink(vlan->lowerdev, dev); |
b863ceb7 | 848 | } |
fc0663d6 | 849 | EXPORT_SYMBOL_GPL(macvlan_dellink); |
b863ceb7 | 850 | |
27c0b1a8 AB |
851 | static int macvlan_changelink(struct net_device *dev, |
852 | struct nlattr *tb[], struct nlattr *data[]) | |
853 | { | |
854 | struct macvlan_dev *vlan = netdev_priv(dev); | |
855 | if (data && data[IFLA_MACVLAN_MODE]) | |
856 | vlan->mode = nla_get_u32(data[IFLA_MACVLAN_MODE]); | |
df8ef8f3 JF |
857 | if (data && data[IFLA_MACVLAN_FLAGS]) { |
858 | __u16 flags = nla_get_u16(data[IFLA_MACVLAN_FLAGS]); | |
859 | bool promisc = (flags ^ vlan->flags) & MACVLAN_FLAG_NOPROMISC; | |
860 | ||
861 | if (promisc && (flags & MACVLAN_FLAG_NOPROMISC)) | |
862 | dev_set_promiscuity(vlan->lowerdev, -1); | |
863 | else if (promisc && !(flags & MACVLAN_FLAG_NOPROMISC)) | |
864 | dev_set_promiscuity(vlan->lowerdev, 1); | |
865 | vlan->flags = flags; | |
866 | } | |
27c0b1a8 AB |
867 | return 0; |
868 | } | |
869 | ||
870 | static size_t macvlan_get_size(const struct net_device *dev) | |
871 | { | |
01fe944f ED |
872 | return (0 |
873 | + nla_total_size(4) /* IFLA_MACVLAN_MODE */ | |
874 | + nla_total_size(2) /* IFLA_MACVLAN_FLAGS */ | |
875 | ); | |
27c0b1a8 AB |
876 | } |
877 | ||
878 | static int macvlan_fill_info(struct sk_buff *skb, | |
879 | const struct net_device *dev) | |
880 | { | |
881 | struct macvlan_dev *vlan = netdev_priv(dev); | |
882 | ||
ead9a76c DM |
883 | if (nla_put_u32(skb, IFLA_MACVLAN_MODE, vlan->mode)) |
884 | goto nla_put_failure; | |
df8ef8f3 JF |
885 | if (nla_put_u16(skb, IFLA_MACVLAN_FLAGS, vlan->flags)) |
886 | goto nla_put_failure; | |
27c0b1a8 AB |
887 | return 0; |
888 | ||
889 | nla_put_failure: | |
890 | return -EMSGSIZE; | |
891 | } | |
892 | ||
893 | static const struct nla_policy macvlan_policy[IFLA_MACVLAN_MAX + 1] = { | |
df8ef8f3 JF |
894 | [IFLA_MACVLAN_MODE] = { .type = NLA_U32 }, |
895 | [IFLA_MACVLAN_FLAGS] = { .type = NLA_U16 }, | |
27c0b1a8 AB |
896 | }; |
897 | ||
fc0663d6 AB |
898 | int macvlan_link_register(struct rtnl_link_ops *ops) |
899 | { | |
900 | /* common fields */ | |
901 | ops->priv_size = sizeof(struct macvlan_dev); | |
fc0663d6 AB |
902 | ops->validate = macvlan_validate; |
903 | ops->maxtype = IFLA_MACVLAN_MAX; | |
904 | ops->policy = macvlan_policy; | |
905 | ops->changelink = macvlan_changelink; | |
906 | ops->get_size = macvlan_get_size; | |
907 | ops->fill_info = macvlan_fill_info; | |
908 | ||
909 | return rtnl_link_register(ops); | |
910 | }; | |
911 | EXPORT_SYMBOL_GPL(macvlan_link_register); | |
912 | ||
913 | static struct rtnl_link_ops macvlan_link_ops = { | |
b863ceb7 | 914 | .kind = "macvlan", |
8a35747a | 915 | .setup = macvlan_setup, |
b863ceb7 PM |
916 | .newlink = macvlan_newlink, |
917 | .dellink = macvlan_dellink, | |
918 | }; | |
919 | ||
920 | static int macvlan_device_event(struct notifier_block *unused, | |
921 | unsigned long event, void *ptr) | |
922 | { | |
923 | struct net_device *dev = ptr; | |
924 | struct macvlan_dev *vlan, *next; | |
925 | struct macvlan_port *port; | |
226bd341 | 926 | LIST_HEAD(list_kill); |
b863ceb7 | 927 | |
a35e2c1b | 928 | if (!macvlan_port_exists(dev)) |
b863ceb7 PM |
929 | return NOTIFY_DONE; |
930 | ||
e052f7e6 | 931 | port = macvlan_port_get_rtnl(dev); |
a35e2c1b | 932 | |
b863ceb7 PM |
933 | switch (event) { |
934 | case NETDEV_CHANGE: | |
935 | list_for_each_entry(vlan, &port->vlans, list) | |
fc4a7489 PM |
936 | netif_stacked_transfer_operstate(vlan->lowerdev, |
937 | vlan->dev); | |
b863ceb7 PM |
938 | break; |
939 | case NETDEV_FEAT_CHANGE: | |
940 | list_for_each_entry(vlan, &port->vlans, list) { | |
941 | vlan->dev->features = dev->features & MACVLAN_FEATURES; | |
8c2acc53 | 942 | vlan->dev->gso_max_size = dev->gso_max_size; |
b863ceb7 PM |
943 | netdev_features_change(vlan->dev); |
944 | } | |
945 | break; | |
946 | case NETDEV_UNREGISTER: | |
3b27e105 DL |
947 | /* twiddle thumbs on netns device moves */ |
948 | if (dev->reg_state != NETREG_UNREGISTERING) | |
949 | break; | |
950 | ||
b863ceb7 | 951 | list_for_each_entry_safe(vlan, next, &port->vlans, list) |
226bd341 ED |
952 | vlan->dev->rtnl_link_ops->dellink(vlan->dev, &list_kill); |
953 | unregister_netdevice_many(&list_kill); | |
954 | list_del(&list_kill); | |
b863ceb7 | 955 | break; |
1c01fe14 JP |
956 | case NETDEV_PRE_TYPE_CHANGE: |
957 | /* Forbid underlaying device to change its type. */ | |
958 | return NOTIFY_BAD; | |
b863ceb7 PM |
959 | } |
960 | return NOTIFY_DONE; | |
961 | } | |
962 | ||
963 | static struct notifier_block macvlan_notifier_block __read_mostly = { | |
964 | .notifier_call = macvlan_device_event, | |
965 | }; | |
966 | ||
967 | static int __init macvlan_init_module(void) | |
968 | { | |
969 | int err; | |
970 | ||
971 | register_netdevice_notifier(&macvlan_notifier_block); | |
b863ceb7 | 972 | |
fc0663d6 | 973 | err = macvlan_link_register(&macvlan_link_ops); |
b863ceb7 PM |
974 | if (err < 0) |
975 | goto err1; | |
976 | return 0; | |
977 | err1: | |
b863ceb7 PM |
978 | unregister_netdevice_notifier(&macvlan_notifier_block); |
979 | return err; | |
980 | } | |
981 | ||
982 | static void __exit macvlan_cleanup_module(void) | |
983 | { | |
984 | rtnl_link_unregister(&macvlan_link_ops); | |
b863ceb7 PM |
985 | unregister_netdevice_notifier(&macvlan_notifier_block); |
986 | } | |
987 | ||
988 | module_init(macvlan_init_module); | |
989 | module_exit(macvlan_cleanup_module); | |
990 | ||
991 | MODULE_LICENSE("GPL"); | |
992 | MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>"); | |
993 | MODULE_DESCRIPTION("Driver for MAC address based VLANs"); | |
994 | MODULE_ALIAS_RTNL_LINK("macvlan"); |