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 | 231 | if (port->passthru) |
233c7df0 JP |
232 | vlan = list_first_or_null_rcu(&port->vlans, |
233 | struct macvlan_dev, list); | |
eb06acdc SS |
234 | else |
235 | vlan = macvlan_hash_lookup(port, eth->h_dest); | |
b863ceb7 | 236 | if (vlan == NULL) |
8a4eb573 | 237 | return RX_HANDLER_PASS; |
b863ceb7 PM |
238 | |
239 | dev = vlan->dev; | |
240 | if (unlikely(!(dev->flags & IFF_UP))) { | |
241 | kfree_skb(skb); | |
8a4eb573 | 242 | return RX_HANDLER_CONSUMED; |
b863ceb7 | 243 | } |
a1e514c5 | 244 | len = skb->len + ETH_HLEN; |
b863ceb7 | 245 | skb = skb_share_check(skb, GFP_ATOMIC); |
a1e514c5 | 246 | if (!skb) |
ba01877f | 247 | goto out; |
b863ceb7 PM |
248 | |
249 | skb->dev = dev; | |
250 | skb->pkt_type = PACKET_HOST; | |
251 | ||
ba01877f SS |
252 | ret = vlan->receive(skb); |
253 | ||
254 | out: | |
255 | macvlan_count_rx(vlan, len, ret == NET_RX_SUCCESS, 0); | |
8a4eb573 | 256 | return RX_HANDLER_CONSUMED; |
b863ceb7 PM |
257 | } |
258 | ||
618e1b74 AB |
259 | static int macvlan_queue_xmit(struct sk_buff *skb, struct net_device *dev) |
260 | { | |
261 | const struct macvlan_dev *vlan = netdev_priv(dev); | |
262 | const struct macvlan_port *port = vlan->port; | |
263 | const struct macvlan_dev *dest; | |
12a2856b | 264 | __u8 ip_summed = skb->ip_summed; |
618e1b74 AB |
265 | |
266 | if (vlan->mode == MACVLAN_MODE_BRIDGE) { | |
267 | const struct ethhdr *eth = (void *)skb->data; | |
12a2856b | 268 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
618e1b74 AB |
269 | |
270 | /* send to other bridge ports directly */ | |
271 | if (is_multicast_ether_addr(eth->h_dest)) { | |
272 | macvlan_broadcast(skb, port, dev, MACVLAN_MODE_BRIDGE); | |
273 | goto xmit_world; | |
274 | } | |
275 | ||
276 | dest = macvlan_hash_lookup(port, eth->h_dest); | |
277 | if (dest && dest->mode == MACVLAN_MODE_BRIDGE) { | |
a37dd333 | 278 | /* send to lowerdev first for its network taps */ |
cb2d0f3e | 279 | dev_forward_skb(vlan->lowerdev, skb); |
618e1b74 AB |
280 | |
281 | return NET_XMIT_SUCCESS; | |
282 | } | |
283 | } | |
284 | ||
285 | xmit_world: | |
12a2856b | 286 | skb->ip_summed = ip_summed; |
59b9997b | 287 | skb->dev = vlan->lowerdev; |
618e1b74 AB |
288 | return dev_queue_xmit(skb); |
289 | } | |
290 | ||
fc0663d6 AB |
291 | netdev_tx_t macvlan_start_xmit(struct sk_buff *skb, |
292 | struct net_device *dev) | |
b863ceb7 | 293 | { |
b863ceb7 PM |
294 | unsigned int len = skb->len; |
295 | int ret; | |
8ffab51b | 296 | const struct macvlan_dev *vlan = netdev_priv(dev); |
b863ceb7 | 297 | |
618e1b74 | 298 | ret = macvlan_queue_xmit(skb, dev); |
2d6c9ffc | 299 | if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) { |
8ffab51b | 300 | struct macvlan_pcpu_stats *pcpu_stats; |
2c114553 | 301 | |
8ffab51b ED |
302 | pcpu_stats = this_cpu_ptr(vlan->pcpu_stats); |
303 | u64_stats_update_begin(&pcpu_stats->syncp); | |
304 | pcpu_stats->tx_packets++; | |
305 | pcpu_stats->tx_bytes += len; | |
306 | u64_stats_update_end(&pcpu_stats->syncp); | |
307 | } else { | |
308 | this_cpu_inc(vlan->pcpu_stats->tx_dropped); | |
309 | } | |
cbbef5e1 | 310 | return ret; |
b863ceb7 | 311 | } |
fc0663d6 | 312 | EXPORT_SYMBOL_GPL(macvlan_start_xmit); |
b863ceb7 PM |
313 | |
314 | static int macvlan_hard_header(struct sk_buff *skb, struct net_device *dev, | |
3b04ddde SH |
315 | unsigned short type, const void *daddr, |
316 | const void *saddr, unsigned len) | |
b863ceb7 PM |
317 | { |
318 | const struct macvlan_dev *vlan = netdev_priv(dev); | |
319 | struct net_device *lowerdev = vlan->lowerdev; | |
320 | ||
0c4e8581 SH |
321 | return dev_hard_header(skb, lowerdev, type, daddr, |
322 | saddr ? : dev->dev_addr, len); | |
b863ceb7 PM |
323 | } |
324 | ||
3b04ddde SH |
325 | static const struct header_ops macvlan_hard_header_ops = { |
326 | .create = macvlan_hard_header, | |
327 | .rebuild = eth_rebuild_header, | |
328 | .parse = eth_header_parse, | |
3b04ddde SH |
329 | .cache = eth_header_cache, |
330 | .cache_update = eth_header_cache_update, | |
331 | }; | |
332 | ||
b863ceb7 PM |
333 | static int macvlan_open(struct net_device *dev) |
334 | { | |
335 | struct macvlan_dev *vlan = netdev_priv(dev); | |
b863ceb7 PM |
336 | struct net_device *lowerdev = vlan->lowerdev; |
337 | int err; | |
338 | ||
eb06acdc | 339 | if (vlan->port->passthru) { |
df8ef8f3 JF |
340 | if (!(vlan->flags & MACVLAN_FLAG_NOPROMISC)) |
341 | dev_set_promiscuity(lowerdev, 1); | |
eb06acdc SS |
342 | goto hash_add; |
343 | } | |
344 | ||
f9ac30f0 EB |
345 | err = -EBUSY; |
346 | if (macvlan_addr_busy(vlan->port, dev->dev_addr)) | |
347 | goto out; | |
348 | ||
a748ee24 | 349 | err = dev_uc_add(lowerdev, dev->dev_addr); |
b863ceb7 | 350 | if (err < 0) |
b89fb7da WC |
351 | goto out; |
352 | if (dev->flags & IFF_ALLMULTI) { | |
353 | err = dev_set_allmulti(lowerdev, 1); | |
354 | if (err < 0) | |
355 | goto del_unicast; | |
356 | } | |
eb06acdc SS |
357 | |
358 | hash_add: | |
f9ac30f0 | 359 | macvlan_hash_add(vlan); |
b863ceb7 | 360 | return 0; |
b89fb7da WC |
361 | |
362 | del_unicast: | |
a748ee24 | 363 | dev_uc_del(lowerdev, dev->dev_addr); |
b89fb7da WC |
364 | out: |
365 | return err; | |
b863ceb7 PM |
366 | } |
367 | ||
368 | static int macvlan_stop(struct net_device *dev) | |
369 | { | |
370 | struct macvlan_dev *vlan = netdev_priv(dev); | |
371 | struct net_device *lowerdev = vlan->lowerdev; | |
372 | ||
df8ef8f3 JF |
373 | dev_uc_unsync(lowerdev, dev); |
374 | dev_mc_unsync(lowerdev, dev); | |
375 | ||
eb06acdc | 376 | if (vlan->port->passthru) { |
df8ef8f3 JF |
377 | if (!(vlan->flags & MACVLAN_FLAG_NOPROMISC)) |
378 | dev_set_promiscuity(lowerdev, -1); | |
eb06acdc SS |
379 | goto hash_del; |
380 | } | |
381 | ||
b863ceb7 PM |
382 | if (dev->flags & IFF_ALLMULTI) |
383 | dev_set_allmulti(lowerdev, -1); | |
384 | ||
a748ee24 | 385 | dev_uc_del(lowerdev, dev->dev_addr); |
b863ceb7 | 386 | |
eb06acdc | 387 | hash_del: |
449f4544 | 388 | macvlan_hash_del(vlan, !dev->dismantle); |
b863ceb7 PM |
389 | return 0; |
390 | } | |
391 | ||
ad5d20a6 PM |
392 | static int macvlan_set_mac_address(struct net_device *dev, void *p) |
393 | { | |
394 | struct macvlan_dev *vlan = netdev_priv(dev); | |
395 | struct net_device *lowerdev = vlan->lowerdev; | |
396 | struct sockaddr *addr = p; | |
397 | int err; | |
398 | ||
399 | if (!is_valid_ether_addr(addr->sa_data)) | |
400 | return -EADDRNOTAVAIL; | |
401 | ||
f9ac30f0 EB |
402 | if (!(dev->flags & IFF_UP)) { |
403 | /* Just copy in the new address */ | |
404 | memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN); | |
405 | } else { | |
406 | /* Rehash and update the device filters */ | |
407 | if (macvlan_addr_busy(vlan->port, addr->sa_data)) | |
408 | return -EBUSY; | |
ad5d20a6 | 409 | |
a748ee24 | 410 | err = dev_uc_add(lowerdev, addr->sa_data); |
ccffad25 | 411 | if (err) |
f9ac30f0 | 412 | return err; |
ad5d20a6 | 413 | |
a748ee24 | 414 | dev_uc_del(lowerdev, dev->dev_addr); |
f9ac30f0 EB |
415 | |
416 | macvlan_hash_change_addr(vlan, addr->sa_data); | |
417 | } | |
ad5d20a6 PM |
418 | return 0; |
419 | } | |
420 | ||
b863ceb7 PM |
421 | static void macvlan_change_rx_flags(struct net_device *dev, int change) |
422 | { | |
423 | struct macvlan_dev *vlan = netdev_priv(dev); | |
424 | struct net_device *lowerdev = vlan->lowerdev; | |
425 | ||
426 | if (change & IFF_ALLMULTI) | |
427 | dev_set_allmulti(lowerdev, dev->flags & IFF_ALLMULTI ? 1 : -1); | |
428 | } | |
429 | ||
df8ef8f3 | 430 | static void macvlan_set_mac_lists(struct net_device *dev) |
b863ceb7 PM |
431 | { |
432 | struct macvlan_dev *vlan = netdev_priv(dev); | |
433 | ||
cd431e73 ED |
434 | if (dev->flags & (IFF_PROMISC | IFF_ALLMULTI)) { |
435 | bitmap_fill(vlan->mc_filter, MACVLAN_MC_FILTER_SZ); | |
436 | } else { | |
437 | struct netdev_hw_addr *ha; | |
438 | DECLARE_BITMAP(filter, MACVLAN_MC_FILTER_SZ); | |
439 | ||
440 | bitmap_zero(filter, MACVLAN_MC_FILTER_SZ); | |
441 | netdev_for_each_mc_addr(ha, dev) { | |
3807ff58 | 442 | __set_bit(mc_hash(vlan, ha->addr), filter); |
cd431e73 | 443 | } |
d5270430 | 444 | |
3807ff58 | 445 | __set_bit(mc_hash(vlan, dev->broadcast), filter); |
d5270430 | 446 | |
cd431e73 ED |
447 | bitmap_copy(vlan->mc_filter, filter, MACVLAN_MC_FILTER_SZ); |
448 | } | |
df8ef8f3 | 449 | dev_uc_sync(vlan->lowerdev, dev); |
b863ceb7 PM |
450 | dev_mc_sync(vlan->lowerdev, dev); |
451 | } | |
452 | ||
453 | static int macvlan_change_mtu(struct net_device *dev, int new_mtu) | |
454 | { | |
455 | struct macvlan_dev *vlan = netdev_priv(dev); | |
456 | ||
457 | if (new_mtu < 68 || vlan->lowerdev->mtu < new_mtu) | |
458 | return -EINVAL; | |
459 | dev->mtu = new_mtu; | |
460 | return 0; | |
461 | } | |
462 | ||
463 | /* | |
464 | * macvlan network devices have devices nesting below it and are a special | |
465 | * "super class" of normal network devices; split their locks off into a | |
466 | * separate class since they always nest. | |
467 | */ | |
468 | static struct lock_class_key macvlan_netdev_xmit_lock_key; | |
cf508b12 | 469 | static struct lock_class_key macvlan_netdev_addr_lock_key; |
b863ceb7 PM |
470 | |
471 | #define MACVLAN_FEATURES \ | |
472 | (NETIF_F_SG | NETIF_F_ALL_CSUM | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST | \ | |
473 | NETIF_F_GSO | NETIF_F_TSO | NETIF_F_UFO | NETIF_F_GSO_ROBUST | \ | |
8d13e670 | 474 | NETIF_F_TSO_ECN | NETIF_F_TSO6 | NETIF_F_GRO | NETIF_F_RXCSUM | \ |
28d2b136 | 475 | NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_HW_VLAN_STAG_FILTER) |
b863ceb7 PM |
476 | |
477 | #define MACVLAN_STATE_MASK \ | |
478 | ((1<<__LINK_STATE_NOCARRIER) | (1<<__LINK_STATE_DORMANT)) | |
479 | ||
e8a0464c DM |
480 | static void macvlan_set_lockdep_class_one(struct net_device *dev, |
481 | struct netdev_queue *txq, | |
482 | void *_unused) | |
c773e847 DM |
483 | { |
484 | lockdep_set_class(&txq->_xmit_lock, | |
485 | &macvlan_netdev_xmit_lock_key); | |
486 | } | |
487 | ||
488 | static void macvlan_set_lockdep_class(struct net_device *dev) | |
489 | { | |
cf508b12 DM |
490 | lockdep_set_class(&dev->addr_list_lock, |
491 | &macvlan_netdev_addr_lock_key); | |
e8a0464c | 492 | netdev_for_each_tx_queue(dev, macvlan_set_lockdep_class_one, NULL); |
c773e847 DM |
493 | } |
494 | ||
b863ceb7 PM |
495 | static int macvlan_init(struct net_device *dev) |
496 | { | |
497 | struct macvlan_dev *vlan = netdev_priv(dev); | |
498 | const struct net_device *lowerdev = vlan->lowerdev; | |
499 | ||
500 | dev->state = (dev->state & ~MACVLAN_STATE_MASK) | | |
501 | (lowerdev->state & MACVLAN_STATE_MASK); | |
502 | dev->features = lowerdev->features & MACVLAN_FEATURES; | |
8ffab51b | 503 | dev->features |= NETIF_F_LLTX; |
8c2acc53 | 504 | dev->gso_max_size = lowerdev->gso_max_size; |
b863ceb7 | 505 | dev->iflink = lowerdev->ifindex; |
ef5c8996 | 506 | dev->hard_header_len = lowerdev->hard_header_len; |
b863ceb7 | 507 | |
c773e847 DM |
508 | macvlan_set_lockdep_class(dev); |
509 | ||
8ffab51b ED |
510 | vlan->pcpu_stats = alloc_percpu(struct macvlan_pcpu_stats); |
511 | if (!vlan->pcpu_stats) | |
fccaf710 ED |
512 | return -ENOMEM; |
513 | ||
b863ceb7 PM |
514 | return 0; |
515 | } | |
516 | ||
fccaf710 ED |
517 | static void macvlan_uninit(struct net_device *dev) |
518 | { | |
519 | struct macvlan_dev *vlan = netdev_priv(dev); | |
d5cd9244 | 520 | struct macvlan_port *port = vlan->port; |
fccaf710 | 521 | |
8ffab51b | 522 | free_percpu(vlan->pcpu_stats); |
d5cd9244 EB |
523 | |
524 | port->count -= 1; | |
525 | if (!port->count) | |
526 | macvlan_port_destroy(port->dev); | |
fccaf710 ED |
527 | } |
528 | ||
28172739 ED |
529 | static struct rtnl_link_stats64 *macvlan_dev_get_stats64(struct net_device *dev, |
530 | struct rtnl_link_stats64 *stats) | |
fccaf710 | 531 | { |
fccaf710 ED |
532 | struct macvlan_dev *vlan = netdev_priv(dev); |
533 | ||
8ffab51b ED |
534 | if (vlan->pcpu_stats) { |
535 | struct macvlan_pcpu_stats *p; | |
536 | u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes; | |
537 | u32 rx_errors = 0, tx_dropped = 0; | |
bc66154e | 538 | unsigned int start; |
fccaf710 ED |
539 | int i; |
540 | ||
541 | for_each_possible_cpu(i) { | |
8ffab51b | 542 | p = per_cpu_ptr(vlan->pcpu_stats, i); |
bc66154e ED |
543 | do { |
544 | start = u64_stats_fetch_begin_bh(&p->syncp); | |
545 | rx_packets = p->rx_packets; | |
546 | rx_bytes = p->rx_bytes; | |
547 | rx_multicast = p->rx_multicast; | |
8ffab51b ED |
548 | tx_packets = p->tx_packets; |
549 | tx_bytes = p->tx_bytes; | |
bc66154e | 550 | } while (u64_stats_fetch_retry_bh(&p->syncp, start)); |
8ffab51b ED |
551 | |
552 | stats->rx_packets += rx_packets; | |
553 | stats->rx_bytes += rx_bytes; | |
554 | stats->multicast += rx_multicast; | |
555 | stats->tx_packets += tx_packets; | |
556 | stats->tx_bytes += tx_bytes; | |
557 | /* rx_errors & tx_dropped are u32, updated | |
558 | * without syncp protection. | |
559 | */ | |
560 | rx_errors += p->rx_errors; | |
561 | tx_dropped += p->tx_dropped; | |
fccaf710 | 562 | } |
8ffab51b ED |
563 | stats->rx_errors = rx_errors; |
564 | stats->rx_dropped = rx_errors; | |
565 | stats->tx_dropped = tx_dropped; | |
fccaf710 ED |
566 | } |
567 | return stats; | |
568 | } | |
569 | ||
8e586137 | 570 | static int macvlan_vlan_rx_add_vid(struct net_device *dev, |
80d5c368 | 571 | __be16 proto, u16 vid) |
8d13e670 JF |
572 | { |
573 | struct macvlan_dev *vlan = netdev_priv(dev); | |
574 | struct net_device *lowerdev = vlan->lowerdev; | |
8d13e670 | 575 | |
80d5c368 | 576 | return vlan_vid_add(lowerdev, proto, vid); |
8d13e670 JF |
577 | } |
578 | ||
8e586137 | 579 | static int macvlan_vlan_rx_kill_vid(struct net_device *dev, |
80d5c368 | 580 | __be16 proto, u16 vid) |
8d13e670 JF |
581 | { |
582 | struct macvlan_dev *vlan = netdev_priv(dev); | |
583 | struct net_device *lowerdev = vlan->lowerdev; | |
8d13e670 | 584 | |
80d5c368 | 585 | vlan_vid_del(lowerdev, proto, vid); |
8e586137 | 586 | return 0; |
8d13e670 JF |
587 | } |
588 | ||
edc7d573 | 589 | static int macvlan_fdb_add(struct ndmsg *ndm, struct nlattr *tb[], |
df8ef8f3 | 590 | struct net_device *dev, |
6b6e2725 | 591 | const unsigned char *addr, |
df8ef8f3 JF |
592 | u16 flags) |
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_add_excl(dev, addr); | |
602 | else if (is_multicast_ether_addr(addr)) | |
603 | err = dev_mc_add_excl(dev, addr); | |
604 | ||
605 | return err; | |
606 | } | |
607 | ||
1690be63 | 608 | static int macvlan_fdb_del(struct ndmsg *ndm, struct nlattr *tb[], |
df8ef8f3 | 609 | struct net_device *dev, |
6b6e2725 | 610 | const unsigned char *addr) |
df8ef8f3 JF |
611 | { |
612 | struct macvlan_dev *vlan = netdev_priv(dev); | |
613 | int err = -EINVAL; | |
614 | ||
615 | if (!vlan->port->passthru) | |
616 | return -EOPNOTSUPP; | |
617 | ||
618 | if (is_unicast_ether_addr(addr)) | |
619 | err = dev_uc_del(dev, addr); | |
620 | else if (is_multicast_ether_addr(addr)) | |
621 | err = dev_mc_del(dev, addr); | |
622 | ||
623 | return err; | |
624 | } | |
625 | ||
b863ceb7 PM |
626 | static void macvlan_ethtool_get_drvinfo(struct net_device *dev, |
627 | struct ethtool_drvinfo *drvinfo) | |
628 | { | |
7826d43f JP |
629 | strlcpy(drvinfo->driver, "macvlan", sizeof(drvinfo->driver)); |
630 | strlcpy(drvinfo->version, "0.1", sizeof(drvinfo->version)); | |
b863ceb7 PM |
631 | } |
632 | ||
9edb8bb6 SH |
633 | static int macvlan_ethtool_get_settings(struct net_device *dev, |
634 | struct ethtool_cmd *cmd) | |
635 | { | |
636 | const struct macvlan_dev *vlan = netdev_priv(dev); | |
4bc71cb9 JP |
637 | |
638 | return __ethtool_get_settings(vlan->lowerdev, cmd); | |
9edb8bb6 SH |
639 | } |
640 | ||
2be5c767 VY |
641 | static netdev_features_t macvlan_fix_features(struct net_device *dev, |
642 | netdev_features_t features) | |
643 | { | |
644 | struct macvlan_dev *vlan = netdev_priv(dev); | |
645 | ||
646 | return features & (vlan->set_features | ~MACVLAN_FEATURES); | |
647 | } | |
648 | ||
b863ceb7 PM |
649 | static const struct ethtool_ops macvlan_ethtool_ops = { |
650 | .get_link = ethtool_op_get_link, | |
9edb8bb6 | 651 | .get_settings = macvlan_ethtool_get_settings, |
b863ceb7 PM |
652 | .get_drvinfo = macvlan_ethtool_get_drvinfo, |
653 | }; | |
654 | ||
54a30c97 SH |
655 | static const struct net_device_ops macvlan_netdev_ops = { |
656 | .ndo_init = macvlan_init, | |
fccaf710 | 657 | .ndo_uninit = macvlan_uninit, |
54a30c97 SH |
658 | .ndo_open = macvlan_open, |
659 | .ndo_stop = macvlan_stop, | |
00829823 | 660 | .ndo_start_xmit = macvlan_start_xmit, |
54a30c97 | 661 | .ndo_change_mtu = macvlan_change_mtu, |
2be5c767 | 662 | .ndo_fix_features = macvlan_fix_features, |
54a30c97 SH |
663 | .ndo_change_rx_flags = macvlan_change_rx_flags, |
664 | .ndo_set_mac_address = macvlan_set_mac_address, | |
df8ef8f3 | 665 | .ndo_set_rx_mode = macvlan_set_mac_lists, |
bc66154e | 666 | .ndo_get_stats64 = macvlan_dev_get_stats64, |
54a30c97 | 667 | .ndo_validate_addr = eth_validate_addr, |
8d13e670 JF |
668 | .ndo_vlan_rx_add_vid = macvlan_vlan_rx_add_vid, |
669 | .ndo_vlan_rx_kill_vid = macvlan_vlan_rx_kill_vid, | |
df8ef8f3 JF |
670 | .ndo_fdb_add = macvlan_fdb_add, |
671 | .ndo_fdb_del = macvlan_fdb_del, | |
672 | .ndo_fdb_dump = ndo_dflt_fdb_dump, | |
54a30c97 SH |
673 | }; |
674 | ||
8a35747a | 675 | void macvlan_common_setup(struct net_device *dev) |
b863ceb7 PM |
676 | { |
677 | ether_setup(dev); | |
678 | ||
550fd08c | 679 | dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING); |
87ab7f6f | 680 | dev->priv_flags |= IFF_UNICAST_FLT; |
54a30c97 | 681 | dev->netdev_ops = &macvlan_netdev_ops; |
b863ceb7 | 682 | dev->destructor = free_netdev; |
3b04ddde | 683 | dev->header_ops = &macvlan_hard_header_ops, |
b863ceb7 | 684 | dev->ethtool_ops = &macvlan_ethtool_ops; |
8a35747a HX |
685 | } |
686 | EXPORT_SYMBOL_GPL(macvlan_common_setup); | |
687 | ||
688 | static void macvlan_setup(struct net_device *dev) | |
689 | { | |
690 | macvlan_common_setup(dev); | |
b863ceb7 PM |
691 | dev->tx_queue_len = 0; |
692 | } | |
693 | ||
694 | static int macvlan_port_create(struct net_device *dev) | |
695 | { | |
696 | struct macvlan_port *port; | |
697 | unsigned int i; | |
ab95bfe0 | 698 | int err; |
b863ceb7 PM |
699 | |
700 | if (dev->type != ARPHRD_ETHER || dev->flags & IFF_LOOPBACK) | |
701 | return -EINVAL; | |
702 | ||
703 | port = kzalloc(sizeof(*port), GFP_KERNEL); | |
704 | if (port == NULL) | |
705 | return -ENOMEM; | |
706 | ||
eb06acdc | 707 | port->passthru = false; |
b863ceb7 PM |
708 | port->dev = dev; |
709 | INIT_LIST_HEAD(&port->vlans); | |
710 | for (i = 0; i < MACVLAN_HASH_SIZE; i++) | |
711 | INIT_HLIST_HEAD(&port->vlan_hash[i]); | |
ab95bfe0 | 712 | |
a35e2c1b JP |
713 | err = netdev_rx_handler_register(dev, macvlan_handle_frame, port); |
714 | if (err) | |
ab95bfe0 | 715 | kfree(port); |
d9351561 ED |
716 | else |
717 | dev->priv_flags |= IFF_MACVLAN_PORT; | |
ab95bfe0 | 718 | return err; |
b863ceb7 PM |
719 | } |
720 | ||
721 | static void macvlan_port_destroy(struct net_device *dev) | |
722 | { | |
e052f7e6 | 723 | struct macvlan_port *port = macvlan_port_get_rtnl(dev); |
b863ceb7 | 724 | |
a35e2c1b | 725 | dev->priv_flags &= ~IFF_MACVLAN_PORT; |
ab95bfe0 | 726 | netdev_rx_handler_unregister(dev); |
6e070aec | 727 | kfree_rcu(port, rcu); |
b863ceb7 PM |
728 | } |
729 | ||
b863ceb7 PM |
730 | static int macvlan_validate(struct nlattr *tb[], struct nlattr *data[]) |
731 | { | |
732 | if (tb[IFLA_ADDRESS]) { | |
733 | if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) | |
734 | return -EINVAL; | |
735 | if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) | |
736 | return -EADDRNOTAVAIL; | |
737 | } | |
27c0b1a8 AB |
738 | |
739 | if (data && data[IFLA_MACVLAN_MODE]) { | |
740 | switch (nla_get_u32(data[IFLA_MACVLAN_MODE])) { | |
741 | case MACVLAN_MODE_PRIVATE: | |
742 | case MACVLAN_MODE_VEPA: | |
743 | case MACVLAN_MODE_BRIDGE: | |
eb06acdc | 744 | case MACVLAN_MODE_PASSTHRU: |
27c0b1a8 AB |
745 | break; |
746 | default: | |
747 | return -EINVAL; | |
748 | } | |
749 | } | |
b863ceb7 PM |
750 | return 0; |
751 | } | |
752 | ||
fc0663d6 AB |
753 | int macvlan_common_newlink(struct net *src_net, struct net_device *dev, |
754 | struct nlattr *tb[], struct nlattr *data[], | |
755 | int (*receive)(struct sk_buff *skb), | |
756 | int (*forward)(struct net_device *dev, | |
757 | struct sk_buff *skb)) | |
b863ceb7 PM |
758 | { |
759 | struct macvlan_dev *vlan = netdev_priv(dev); | |
760 | struct macvlan_port *port; | |
761 | struct net_device *lowerdev; | |
762 | int err; | |
763 | ||
764 | if (!tb[IFLA_LINK]) | |
765 | return -EINVAL; | |
766 | ||
81adee47 | 767 | lowerdev = __dev_get_by_index(src_net, nla_get_u32(tb[IFLA_LINK])); |
b863ceb7 PM |
768 | if (lowerdev == NULL) |
769 | return -ENODEV; | |
770 | ||
b0832a29 EB |
771 | /* When creating macvlans on top of other macvlans - use |
772 | * the real device as the lowerdev. | |
a6ca5f1d | 773 | */ |
b0832a29 EB |
774 | if (lowerdev->rtnl_link_ops == dev->rtnl_link_ops) { |
775 | struct macvlan_dev *lowervlan = netdev_priv(lowerdev); | |
776 | lowerdev = lowervlan->lowerdev; | |
777 | } | |
a6ca5f1d | 778 | |
b863ceb7 PM |
779 | if (!tb[IFLA_MTU]) |
780 | dev->mtu = lowerdev->mtu; | |
781 | else if (dev->mtu > lowerdev->mtu) | |
782 | return -EINVAL; | |
783 | ||
784 | if (!tb[IFLA_ADDRESS]) | |
7ce5d222 | 785 | eth_hw_addr_random(dev); |
b863ceb7 | 786 | |
a35e2c1b | 787 | if (!macvlan_port_exists(lowerdev)) { |
b863ceb7 PM |
788 | err = macvlan_port_create(lowerdev); |
789 | if (err < 0) | |
790 | return err; | |
791 | } | |
e052f7e6 | 792 | port = macvlan_port_get_rtnl(lowerdev); |
b863ceb7 | 793 | |
eb06acdc SS |
794 | /* Only 1 macvlan device can be created in passthru mode */ |
795 | if (port->passthru) | |
796 | return -EINVAL; | |
797 | ||
b863ceb7 PM |
798 | vlan->lowerdev = lowerdev; |
799 | vlan->dev = dev; | |
800 | vlan->port = port; | |
fc0663d6 AB |
801 | vlan->receive = receive; |
802 | vlan->forward = forward; | |
2be5c767 | 803 | vlan->set_features = MACVLAN_FEATURES; |
b863ceb7 | 804 | |
27c0b1a8 AB |
805 | vlan->mode = MACVLAN_MODE_VEPA; |
806 | if (data && data[IFLA_MACVLAN_MODE]) | |
807 | vlan->mode = nla_get_u32(data[IFLA_MACVLAN_MODE]); | |
808 | ||
df8ef8f3 JF |
809 | if (data && data[IFLA_MACVLAN_FLAGS]) |
810 | vlan->flags = nla_get_u16(data[IFLA_MACVLAN_FLAGS]); | |
811 | ||
eb06acdc | 812 | if (vlan->mode == MACVLAN_MODE_PASSTHRU) { |
d5cd9244 | 813 | if (port->count) |
eb06acdc SS |
814 | return -EINVAL; |
815 | port->passthru = true; | |
816 | memcpy(dev->dev_addr, lowerdev->dev_addr, ETH_ALEN); | |
817 | } | |
818 | ||
7cd43db7 JP |
819 | err = netdev_upper_dev_link(lowerdev, dev); |
820 | if (err) | |
821 | goto destroy_port; | |
822 | ||
d5cd9244 | 823 | port->count += 1; |
b863ceb7 PM |
824 | err = register_netdevice(dev); |
825 | if (err < 0) | |
7cd43db7 | 826 | goto upper_dev_unlink; |
b863ceb7 | 827 | |
233c7df0 | 828 | list_add_tail_rcu(&vlan->list, &port->vlans); |
fc4a7489 | 829 | netif_stacked_transfer_operstate(lowerdev, dev); |
f16d3d57 | 830 | |
b863ceb7 | 831 | return 0; |
f16d3d57 | 832 | |
7cd43db7 JP |
833 | upper_dev_unlink: |
834 | netdev_upper_dev_unlink(lowerdev, dev); | |
f16d3d57 | 835 | destroy_port: |
d5cd9244 EB |
836 | port->count -= 1; |
837 | if (!port->count) | |
f16d3d57 JP |
838 | macvlan_port_destroy(lowerdev); |
839 | ||
840 | return err; | |
b863ceb7 | 841 | } |
fc0663d6 | 842 | EXPORT_SYMBOL_GPL(macvlan_common_newlink); |
b863ceb7 | 843 | |
fc0663d6 AB |
844 | static int macvlan_newlink(struct net *src_net, struct net_device *dev, |
845 | struct nlattr *tb[], struct nlattr *data[]) | |
846 | { | |
847 | return macvlan_common_newlink(src_net, dev, tb, data, | |
848 | netif_rx, | |
849 | dev_forward_skb); | |
850 | } | |
851 | ||
852 | void macvlan_dellink(struct net_device *dev, struct list_head *head) | |
b863ceb7 PM |
853 | { |
854 | struct macvlan_dev *vlan = netdev_priv(dev); | |
b863ceb7 | 855 | |
233c7df0 | 856 | list_del_rcu(&vlan->list); |
23289a37 | 857 | unregister_netdevice_queue(dev, head); |
7cd43db7 | 858 | netdev_upper_dev_unlink(vlan->lowerdev, dev); |
b863ceb7 | 859 | } |
fc0663d6 | 860 | EXPORT_SYMBOL_GPL(macvlan_dellink); |
b863ceb7 | 861 | |
27c0b1a8 AB |
862 | static int macvlan_changelink(struct net_device *dev, |
863 | struct nlattr *tb[], struct nlattr *data[]) | |
864 | { | |
865 | struct macvlan_dev *vlan = netdev_priv(dev); | |
99ffc3e7 | 866 | |
df8ef8f3 JF |
867 | if (data && data[IFLA_MACVLAN_FLAGS]) { |
868 | __u16 flags = nla_get_u16(data[IFLA_MACVLAN_FLAGS]); | |
869 | bool promisc = (flags ^ vlan->flags) & MACVLAN_FLAG_NOPROMISC; | |
99ffc3e7 MT |
870 | if (vlan->port->passthru && promisc) { |
871 | int err; | |
872 | ||
873 | if (flags & MACVLAN_FLAG_NOPROMISC) | |
874 | err = dev_set_promiscuity(vlan->lowerdev, -1); | |
875 | else | |
876 | err = dev_set_promiscuity(vlan->lowerdev, 1); | |
877 | if (err < 0) | |
878 | return err; | |
879 | } | |
df8ef8f3 JF |
880 | vlan->flags = flags; |
881 | } | |
99ffc3e7 MT |
882 | if (data && data[IFLA_MACVLAN_MODE]) |
883 | vlan->mode = nla_get_u32(data[IFLA_MACVLAN_MODE]); | |
27c0b1a8 AB |
884 | return 0; |
885 | } | |
886 | ||
887 | static size_t macvlan_get_size(const struct net_device *dev) | |
888 | { | |
01fe944f ED |
889 | return (0 |
890 | + nla_total_size(4) /* IFLA_MACVLAN_MODE */ | |
891 | + nla_total_size(2) /* IFLA_MACVLAN_FLAGS */ | |
892 | ); | |
27c0b1a8 AB |
893 | } |
894 | ||
895 | static int macvlan_fill_info(struct sk_buff *skb, | |
896 | const struct net_device *dev) | |
897 | { | |
898 | struct macvlan_dev *vlan = netdev_priv(dev); | |
899 | ||
ead9a76c DM |
900 | if (nla_put_u32(skb, IFLA_MACVLAN_MODE, vlan->mode)) |
901 | goto nla_put_failure; | |
df8ef8f3 JF |
902 | if (nla_put_u16(skb, IFLA_MACVLAN_FLAGS, vlan->flags)) |
903 | goto nla_put_failure; | |
27c0b1a8 AB |
904 | return 0; |
905 | ||
906 | nla_put_failure: | |
907 | return -EMSGSIZE; | |
908 | } | |
909 | ||
910 | static const struct nla_policy macvlan_policy[IFLA_MACVLAN_MAX + 1] = { | |
df8ef8f3 JF |
911 | [IFLA_MACVLAN_MODE] = { .type = NLA_U32 }, |
912 | [IFLA_MACVLAN_FLAGS] = { .type = NLA_U16 }, | |
27c0b1a8 AB |
913 | }; |
914 | ||
fc0663d6 AB |
915 | int macvlan_link_register(struct rtnl_link_ops *ops) |
916 | { | |
917 | /* common fields */ | |
918 | ops->priv_size = sizeof(struct macvlan_dev); | |
fc0663d6 AB |
919 | ops->validate = macvlan_validate; |
920 | ops->maxtype = IFLA_MACVLAN_MAX; | |
921 | ops->policy = macvlan_policy; | |
922 | ops->changelink = macvlan_changelink; | |
923 | ops->get_size = macvlan_get_size; | |
924 | ops->fill_info = macvlan_fill_info; | |
925 | ||
926 | return rtnl_link_register(ops); | |
927 | }; | |
928 | EXPORT_SYMBOL_GPL(macvlan_link_register); | |
929 | ||
930 | static struct rtnl_link_ops macvlan_link_ops = { | |
b863ceb7 | 931 | .kind = "macvlan", |
8a35747a | 932 | .setup = macvlan_setup, |
b863ceb7 PM |
933 | .newlink = macvlan_newlink, |
934 | .dellink = macvlan_dellink, | |
935 | }; | |
936 | ||
937 | static int macvlan_device_event(struct notifier_block *unused, | |
938 | unsigned long event, void *ptr) | |
939 | { | |
351638e7 | 940 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); |
b863ceb7 PM |
941 | struct macvlan_dev *vlan, *next; |
942 | struct macvlan_port *port; | |
226bd341 | 943 | LIST_HEAD(list_kill); |
b863ceb7 | 944 | |
a35e2c1b | 945 | if (!macvlan_port_exists(dev)) |
b863ceb7 PM |
946 | return NOTIFY_DONE; |
947 | ||
e052f7e6 | 948 | port = macvlan_port_get_rtnl(dev); |
a35e2c1b | 949 | |
b863ceb7 PM |
950 | switch (event) { |
951 | case NETDEV_CHANGE: | |
952 | list_for_each_entry(vlan, &port->vlans, list) | |
fc4a7489 PM |
953 | netif_stacked_transfer_operstate(vlan->lowerdev, |
954 | vlan->dev); | |
b863ceb7 PM |
955 | break; |
956 | case NETDEV_FEAT_CHANGE: | |
957 | list_for_each_entry(vlan, &port->vlans, list) { | |
958 | vlan->dev->features = dev->features & MACVLAN_FEATURES; | |
8c2acc53 | 959 | vlan->dev->gso_max_size = dev->gso_max_size; |
b863ceb7 PM |
960 | netdev_features_change(vlan->dev); |
961 | } | |
962 | break; | |
963 | case NETDEV_UNREGISTER: | |
3b27e105 DL |
964 | /* twiddle thumbs on netns device moves */ |
965 | if (dev->reg_state != NETREG_UNREGISTERING) | |
966 | break; | |
967 | ||
b863ceb7 | 968 | list_for_each_entry_safe(vlan, next, &port->vlans, list) |
226bd341 ED |
969 | vlan->dev->rtnl_link_ops->dellink(vlan->dev, &list_kill); |
970 | unregister_netdevice_many(&list_kill); | |
971 | list_del(&list_kill); | |
b863ceb7 | 972 | break; |
1c01fe14 JP |
973 | case NETDEV_PRE_TYPE_CHANGE: |
974 | /* Forbid underlaying device to change its type. */ | |
975 | return NOTIFY_BAD; | |
b863ceb7 PM |
976 | } |
977 | return NOTIFY_DONE; | |
978 | } | |
979 | ||
980 | static struct notifier_block macvlan_notifier_block __read_mostly = { | |
981 | .notifier_call = macvlan_device_event, | |
982 | }; | |
983 | ||
984 | static int __init macvlan_init_module(void) | |
985 | { | |
986 | int err; | |
987 | ||
988 | register_netdevice_notifier(&macvlan_notifier_block); | |
b863ceb7 | 989 | |
fc0663d6 | 990 | err = macvlan_link_register(&macvlan_link_ops); |
b863ceb7 PM |
991 | if (err < 0) |
992 | goto err1; | |
993 | return 0; | |
994 | err1: | |
b863ceb7 PM |
995 | unregister_netdevice_notifier(&macvlan_notifier_block); |
996 | return err; | |
997 | } | |
998 | ||
999 | static void __exit macvlan_cleanup_module(void) | |
1000 | { | |
1001 | rtnl_link_unregister(&macvlan_link_ops); | |
b863ceb7 PM |
1002 | unregister_netdevice_notifier(&macvlan_notifier_block); |
1003 | } | |
1004 | ||
1005 | module_init(macvlan_init_module); | |
1006 | module_exit(macvlan_cleanup_module); | |
1007 | ||
1008 | MODULE_LICENSE("GPL"); | |
1009 | MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>"); | |
1010 | MODULE_DESCRIPTION("Driver for MAC address based VLANs"); | |
1011 | MODULE_ALIAS_RTNL_LINK("macvlan"); |