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> |
412ca155 | 33 | #include <linux/workqueue.h> |
b863ceb7 | 34 | #include <net/rtnetlink.h> |
618e1b74 | 35 | #include <net/xfrm.h> |
688cea83 | 36 | #include <linux/netpoll.h> |
b863ceb7 | 37 | |
79cf79ab MB |
38 | #define MACVLAN_HASH_BITS 8 |
39 | #define MACVLAN_HASH_SIZE (1<<MACVLAN_HASH_BITS) | |
07d92d5c | 40 | #define MACVLAN_BC_QUEUE_LEN 1000 |
b863ceb7 PM |
41 | |
42 | struct macvlan_port { | |
43 | struct net_device *dev; | |
44 | struct hlist_head vlan_hash[MACVLAN_HASH_SIZE]; | |
45 | struct list_head vlans; | |
8b37ef0a | 46 | struct rcu_head rcu; |
412ca155 HX |
47 | struct sk_buff_head bc_queue; |
48 | struct work_struct bc_work; | |
eb06acdc | 49 | bool passthru; |
5e3c516b | 50 | int count; |
79cf79ab MB |
51 | struct hlist_head vlan_source_hash[MACVLAN_HASH_SIZE]; |
52 | }; | |
53 | ||
54 | struct macvlan_source_entry { | |
55 | struct hlist_node hlist; | |
56 | struct macvlan_dev *vlan; | |
57 | unsigned char addr[6+2] __aligned(sizeof(u16)); | |
58 | struct rcu_head rcu; | |
b863ceb7 PM |
59 | }; |
60 | ||
412ca155 HX |
61 | struct macvlan_skb_cb { |
62 | const struct macvlan_dev *src; | |
63 | }; | |
64 | ||
65 | #define MACVLAN_SKB_CB(__skb) ((struct macvlan_skb_cb *)&((__skb)->cb[0])) | |
66 | ||
d5cd9244 EB |
67 | static void macvlan_port_destroy(struct net_device *dev); |
68 | ||
79cf79ab MB |
69 | /* Hash Ethernet address */ |
70 | static u32 macvlan_eth_hash(const unsigned char *addr) | |
71 | { | |
72 | u64 value = get_unaligned((u64 *)addr); | |
73 | ||
74 | /* only want 6 bytes */ | |
75 | #ifdef __BIG_ENDIAN | |
76 | value >>= 16; | |
77 | #else | |
78 | value <<= 16; | |
79 | #endif | |
80 | return hash_64(value, MACVLAN_HASH_BITS); | |
81 | } | |
82 | ||
e052f7e6 ED |
83 | static struct macvlan_port *macvlan_port_get_rcu(const struct net_device *dev) |
84 | { | |
85 | return rcu_dereference(dev->rx_handler_data); | |
86 | } | |
87 | ||
88 | static struct macvlan_port *macvlan_port_get_rtnl(const struct net_device *dev) | |
89 | { | |
90 | return rtnl_dereference(dev->rx_handler_data); | |
91 | } | |
92 | ||
a35e2c1b JP |
93 | #define macvlan_port_exists(dev) (dev->priv_flags & IFF_MACVLAN_PORT) |
94 | ||
b863ceb7 PM |
95 | static struct macvlan_dev *macvlan_hash_lookup(const struct macvlan_port *port, |
96 | const unsigned char *addr) | |
97 | { | |
98 | struct macvlan_dev *vlan; | |
79cf79ab | 99 | u32 idx = macvlan_eth_hash(addr); |
b863ceb7 | 100 | |
79cf79ab | 101 | hlist_for_each_entry_rcu(vlan, &port->vlan_hash[idx], hlist) { |
a6700db1 | 102 | if (ether_addr_equal_64bits(vlan->dev->dev_addr, addr)) |
b863ceb7 PM |
103 | return vlan; |
104 | } | |
105 | return NULL; | |
106 | } | |
107 | ||
79cf79ab MB |
108 | static struct macvlan_source_entry *macvlan_hash_lookup_source( |
109 | const struct macvlan_dev *vlan, | |
110 | const unsigned char *addr) | |
111 | { | |
112 | struct macvlan_source_entry *entry; | |
113 | u32 idx = macvlan_eth_hash(addr); | |
114 | struct hlist_head *h = &vlan->port->vlan_source_hash[idx]; | |
115 | ||
116 | hlist_for_each_entry_rcu(entry, h, hlist) { | |
117 | if (ether_addr_equal_64bits(entry->addr, addr) && | |
118 | entry->vlan == vlan) | |
119 | return entry; | |
120 | } | |
121 | return NULL; | |
122 | } | |
123 | ||
124 | static int macvlan_hash_add_source(struct macvlan_dev *vlan, | |
125 | const unsigned char *addr) | |
126 | { | |
127 | struct macvlan_port *port = vlan->port; | |
128 | struct macvlan_source_entry *entry; | |
129 | struct hlist_head *h; | |
130 | ||
131 | entry = macvlan_hash_lookup_source(vlan, addr); | |
132 | if (entry) | |
133 | return 0; | |
134 | ||
135 | entry = kmalloc(sizeof(*entry), GFP_KERNEL); | |
136 | if (!entry) | |
137 | return -ENOMEM; | |
138 | ||
139 | ether_addr_copy(entry->addr, addr); | |
140 | entry->vlan = vlan; | |
141 | h = &port->vlan_source_hash[macvlan_eth_hash(addr)]; | |
142 | hlist_add_head_rcu(&entry->hlist, h); | |
143 | vlan->macaddr_count++; | |
144 | ||
145 | return 0; | |
146 | } | |
147 | ||
f9ac30f0 EB |
148 | static void macvlan_hash_add(struct macvlan_dev *vlan) |
149 | { | |
150 | struct macvlan_port *port = vlan->port; | |
151 | const unsigned char *addr = vlan->dev->dev_addr; | |
79cf79ab | 152 | u32 idx = macvlan_eth_hash(addr); |
f9ac30f0 | 153 | |
79cf79ab MB |
154 | hlist_add_head_rcu(&vlan->hlist, &port->vlan_hash[idx]); |
155 | } | |
156 | ||
157 | static void macvlan_hash_del_source(struct macvlan_source_entry *entry) | |
158 | { | |
159 | hlist_del_rcu(&entry->hlist); | |
160 | kfree_rcu(entry, rcu); | |
f9ac30f0 EB |
161 | } |
162 | ||
449f4544 | 163 | static void macvlan_hash_del(struct macvlan_dev *vlan, bool sync) |
f9ac30f0 EB |
164 | { |
165 | hlist_del_rcu(&vlan->hlist); | |
449f4544 ED |
166 | if (sync) |
167 | synchronize_rcu(); | |
f9ac30f0 EB |
168 | } |
169 | ||
170 | static void macvlan_hash_change_addr(struct macvlan_dev *vlan, | |
171 | const unsigned char *addr) | |
172 | { | |
449f4544 | 173 | macvlan_hash_del(vlan, true); |
f9ac30f0 EB |
174 | /* Now that we are unhashed it is safe to change the device |
175 | * address without confusing packet delivery. | |
176 | */ | |
177 | memcpy(vlan->dev->dev_addr, addr, ETH_ALEN); | |
178 | macvlan_hash_add(vlan); | |
179 | } | |
180 | ||
181 | static int macvlan_addr_busy(const struct macvlan_port *port, | |
182 | const unsigned char *addr) | |
183 | { | |
184 | /* Test to see if the specified multicast address is | |
185 | * currently in use by the underlying device or | |
186 | * another macvlan. | |
187 | */ | |
a6700db1 | 188 | if (ether_addr_equal_64bits(port->dev->dev_addr, addr)) |
f9ac30f0 EB |
189 | return 1; |
190 | ||
191 | if (macvlan_hash_lookup(port, addr)) | |
192 | return 1; | |
193 | ||
194 | return 0; | |
195 | } | |
196 | ||
a1e514c5 | 197 | |
fc0663d6 AB |
198 | static int macvlan_broadcast_one(struct sk_buff *skb, |
199 | const struct macvlan_dev *vlan, | |
618e1b74 | 200 | const struct ethhdr *eth, bool local) |
a1e514c5 | 201 | { |
fc0663d6 | 202 | struct net_device *dev = vlan->dev; |
a1e514c5 | 203 | |
618e1b74 | 204 | if (local) |
412ca155 | 205 | return __dev_forward_skb(dev, skb); |
618e1b74 | 206 | |
a1e514c5 | 207 | skb->dev = dev; |
a6700db1 | 208 | if (ether_addr_equal_64bits(eth->h_dest, dev->broadcast)) |
a1e514c5 AB |
209 | skb->pkt_type = PACKET_BROADCAST; |
210 | else | |
211 | skb->pkt_type = PACKET_MULTICAST; | |
212 | ||
412ca155 | 213 | return 0; |
a1e514c5 AB |
214 | } |
215 | ||
3807ff58 ED |
216 | static u32 macvlan_hash_mix(const struct macvlan_dev *vlan) |
217 | { | |
218 | return (u32)(((unsigned long)vlan) >> L1_CACHE_SHIFT); | |
219 | } | |
220 | ||
221 | ||
222 | static unsigned int mc_hash(const struct macvlan_dev *vlan, | |
223 | const unsigned char *addr) | |
cd431e73 ED |
224 | { |
225 | u32 val = __get_unaligned_cpu32(addr + 2); | |
226 | ||
3807ff58 | 227 | val ^= macvlan_hash_mix(vlan); |
cd431e73 ED |
228 | return hash_32(val, MACVLAN_MC_FILTER_BITS); |
229 | } | |
230 | ||
b863ceb7 | 231 | static void macvlan_broadcast(struct sk_buff *skb, |
618e1b74 AB |
232 | const struct macvlan_port *port, |
233 | struct net_device *src, | |
234 | enum macvlan_mode mode) | |
b863ceb7 PM |
235 | { |
236 | const struct ethhdr *eth = eth_hdr(skb); | |
237 | const struct macvlan_dev *vlan; | |
b863ceb7 PM |
238 | struct sk_buff *nskb; |
239 | unsigned int i; | |
a1e514c5 | 240 | int err; |
3807ff58 | 241 | unsigned int hash; |
b863ceb7 | 242 | |
efbbced3 PM |
243 | if (skb->protocol == htons(ETH_P_PAUSE)) |
244 | return; | |
245 | ||
b863ceb7 | 246 | for (i = 0; i < MACVLAN_HASH_SIZE; i++) { |
b67bfe0d | 247 | hlist_for_each_entry_rcu(vlan, &port->vlan_hash[i], hlist) { |
618e1b74 AB |
248 | if (vlan->dev == src || !(vlan->mode & mode)) |
249 | continue; | |
250 | ||
3807ff58 | 251 | hash = mc_hash(vlan, eth->h_dest); |
cd431e73 ED |
252 | if (!test_bit(hash, vlan->mc_filter)) |
253 | continue; | |
de9e8f3f HX |
254 | |
255 | err = NET_RX_DROP; | |
b863ceb7 | 256 | nskb = skb_clone(skb, GFP_ATOMIC); |
de9e8f3f HX |
257 | if (likely(nskb)) |
258 | err = macvlan_broadcast_one( | |
259 | nskb, vlan, eth, | |
412ca155 HX |
260 | mode == MACVLAN_MODE_BRIDGE) ?: |
261 | netif_rx_ni(nskb); | |
a1e514c5 AB |
262 | macvlan_count_rx(vlan, skb->len + ETH_HLEN, |
263 | err == NET_RX_SUCCESS, 1); | |
b863ceb7 PM |
264 | } |
265 | } | |
266 | } | |
267 | ||
412ca155 | 268 | static void macvlan_process_broadcast(struct work_struct *w) |
b863ceb7 | 269 | { |
412ca155 HX |
270 | struct macvlan_port *port = container_of(w, struct macvlan_port, |
271 | bc_work); | |
272 | struct sk_buff *skb; | |
273 | struct sk_buff_head list; | |
274 | ||
275 | skb_queue_head_init(&list); | |
276 | ||
277 | spin_lock_bh(&port->bc_queue.lock); | |
278 | skb_queue_splice_tail_init(&port->bc_queue, &list); | |
279 | spin_unlock_bh(&port->bc_queue.lock); | |
280 | ||
281 | while ((skb = __skb_dequeue(&list))) { | |
282 | const struct macvlan_dev *src = MACVLAN_SKB_CB(skb)->src; | |
283 | ||
284 | rcu_read_lock(); | |
b863ceb7 | 285 | |
618e1b74 AB |
286 | if (!src) |
287 | /* frame comes from an external address */ | |
288 | macvlan_broadcast(skb, port, NULL, | |
289 | MACVLAN_MODE_PRIVATE | | |
290 | MACVLAN_MODE_VEPA | | |
eb06acdc | 291 | MACVLAN_MODE_PASSTHRU| |
618e1b74 AB |
292 | MACVLAN_MODE_BRIDGE); |
293 | else if (src->mode == MACVLAN_MODE_VEPA) | |
294 | /* flood to everyone except source */ | |
295 | macvlan_broadcast(skb, port, src->dev, | |
296 | MACVLAN_MODE_VEPA | | |
297 | MACVLAN_MODE_BRIDGE); | |
412ca155 | 298 | else |
618e1b74 AB |
299 | /* |
300 | * flood only to VEPA ports, bridge ports | |
301 | * already saw the frame on the way out. | |
302 | */ | |
303 | macvlan_broadcast(skb, port, src->dev, | |
304 | MACVLAN_MODE_VEPA); | |
412ca155 HX |
305 | |
306 | rcu_read_unlock(); | |
307 | ||
308 | kfree_skb(skb); | |
309 | } | |
310 | } | |
311 | ||
312 | static void macvlan_broadcast_enqueue(struct macvlan_port *port, | |
313 | struct sk_buff *skb) | |
314 | { | |
e676f197 | 315 | struct sk_buff *nskb; |
412ca155 HX |
316 | int err = -ENOMEM; |
317 | ||
e676f197 HX |
318 | nskb = skb_clone(skb, GFP_ATOMIC); |
319 | if (!nskb) | |
412ca155 HX |
320 | goto err; |
321 | ||
322 | spin_lock(&port->bc_queue.lock); | |
07d92d5c | 323 | if (skb_queue_len(&port->bc_queue) < MACVLAN_BC_QUEUE_LEN) { |
e676f197 | 324 | __skb_queue_tail(&port->bc_queue, nskb); |
412ca155 HX |
325 | err = 0; |
326 | } | |
327 | spin_unlock(&port->bc_queue.lock); | |
328 | ||
329 | if (err) | |
e676f197 | 330 | goto free_nskb; |
412ca155 HX |
331 | |
332 | schedule_work(&port->bc_work); | |
333 | return; | |
334 | ||
e676f197 HX |
335 | free_nskb: |
336 | kfree_skb(nskb); | |
412ca155 HX |
337 | err: |
338 | atomic_long_inc(&skb->dev->rx_dropped); | |
339 | } | |
340 | ||
79cf79ab MB |
341 | static void macvlan_flush_sources(struct macvlan_port *port, |
342 | struct macvlan_dev *vlan) | |
343 | { | |
344 | int i; | |
345 | ||
346 | for (i = 0; i < MACVLAN_HASH_SIZE; i++) { | |
347 | struct hlist_node *h, *n; | |
348 | ||
349 | hlist_for_each_safe(h, n, &port->vlan_source_hash[i]) { | |
350 | struct macvlan_source_entry *entry; | |
351 | ||
352 | entry = hlist_entry(h, struct macvlan_source_entry, | |
353 | hlist); | |
354 | if (entry->vlan == vlan) | |
355 | macvlan_hash_del_source(entry); | |
356 | } | |
357 | } | |
358 | vlan->macaddr_count = 0; | |
359 | } | |
360 | ||
361 | static void macvlan_forward_source_one(struct sk_buff *skb, | |
362 | struct macvlan_dev *vlan) | |
363 | { | |
364 | struct sk_buff *nskb; | |
365 | struct net_device *dev; | |
366 | int len; | |
367 | int ret; | |
368 | ||
369 | dev = vlan->dev; | |
370 | if (unlikely(!(dev->flags & IFF_UP))) | |
371 | return; | |
372 | ||
373 | nskb = skb_clone(skb, GFP_ATOMIC); | |
374 | if (!nskb) | |
375 | return; | |
376 | ||
377 | len = nskb->len + ETH_HLEN; | |
378 | nskb->dev = dev; | |
379 | nskb->pkt_type = PACKET_HOST; | |
380 | ||
381 | ret = netif_rx(nskb); | |
382 | macvlan_count_rx(vlan, len, ret == NET_RX_SUCCESS, 0); | |
383 | } | |
384 | ||
385 | static void macvlan_forward_source(struct sk_buff *skb, | |
386 | struct macvlan_port *port, | |
387 | const unsigned char *addr) | |
388 | { | |
389 | struct macvlan_source_entry *entry; | |
390 | u32 idx = macvlan_eth_hash(addr); | |
391 | struct hlist_head *h = &port->vlan_source_hash[idx]; | |
392 | ||
393 | hlist_for_each_entry_rcu(entry, h, hlist) { | |
394 | if (ether_addr_equal_64bits(entry->addr, addr)) | |
395 | if (entry->vlan->dev->flags & IFF_UP) | |
396 | macvlan_forward_source_one(skb, entry->vlan); | |
397 | } | |
398 | } | |
399 | ||
412ca155 HX |
400 | /* called under rcu_read_lock() from netif_receive_skb */ |
401 | static rx_handler_result_t macvlan_handle_frame(struct sk_buff **pskb) | |
402 | { | |
403 | struct macvlan_port *port; | |
404 | struct sk_buff *skb = *pskb; | |
405 | const struct ethhdr *eth = eth_hdr(skb); | |
406 | const struct macvlan_dev *vlan; | |
407 | const struct macvlan_dev *src; | |
408 | struct net_device *dev; | |
409 | unsigned int len = 0; | |
410 | int ret = NET_RX_DROP; | |
411 | ||
412 | port = macvlan_port_get_rcu(skb->dev); | |
413 | if (is_multicast_ether_addr(eth->h_dest)) { | |
414 | skb = ip_check_defrag(skb, IP_DEFRAG_MACVLAN); | |
415 | if (!skb) | |
416 | return RX_HANDLER_CONSUMED; | |
417 | eth = eth_hdr(skb); | |
79cf79ab | 418 | macvlan_forward_source(skb, port, eth->h_source); |
412ca155 HX |
419 | src = macvlan_hash_lookup(port, eth->h_source); |
420 | if (src && src->mode != MACVLAN_MODE_VEPA && | |
421 | src->mode != MACVLAN_MODE_BRIDGE) { | |
729e72a1 | 422 | /* forward to original port. */ |
423 | vlan = src; | |
412ca155 HX |
424 | ret = macvlan_broadcast_one(skb, vlan, eth, 0) ?: |
425 | netif_rx(skb); | |
729e72a1 | 426 | goto out; |
427 | } | |
428 | ||
412ca155 HX |
429 | MACVLAN_SKB_CB(skb)->src = src; |
430 | macvlan_broadcast_enqueue(port, skb); | |
431 | ||
8a4eb573 | 432 | return RX_HANDLER_PASS; |
b863ceb7 PM |
433 | } |
434 | ||
79cf79ab | 435 | macvlan_forward_source(skb, port, eth->h_source); |
eb06acdc | 436 | if (port->passthru) |
233c7df0 JP |
437 | vlan = list_first_or_null_rcu(&port->vlans, |
438 | struct macvlan_dev, list); | |
eb06acdc SS |
439 | else |
440 | vlan = macvlan_hash_lookup(port, eth->h_dest); | |
b863ceb7 | 441 | if (vlan == NULL) |
8a4eb573 | 442 | return RX_HANDLER_PASS; |
b863ceb7 PM |
443 | |
444 | dev = vlan->dev; | |
445 | if (unlikely(!(dev->flags & IFF_UP))) { | |
446 | kfree_skb(skb); | |
8a4eb573 | 447 | return RX_HANDLER_CONSUMED; |
b863ceb7 | 448 | } |
a1e514c5 | 449 | len = skb->len + ETH_HLEN; |
b863ceb7 | 450 | skb = skb_share_check(skb, GFP_ATOMIC); |
a1e514c5 | 451 | if (!skb) |
ba01877f | 452 | goto out; |
b863ceb7 PM |
453 | |
454 | skb->dev = dev; | |
455 | skb->pkt_type = PACKET_HOST; | |
456 | ||
2f6a1b66 | 457 | ret = netif_rx(skb); |
ba01877f SS |
458 | |
459 | out: | |
460 | macvlan_count_rx(vlan, len, ret == NET_RX_SUCCESS, 0); | |
8a4eb573 | 461 | return RX_HANDLER_CONSUMED; |
b863ceb7 PM |
462 | } |
463 | ||
618e1b74 AB |
464 | static int macvlan_queue_xmit(struct sk_buff *skb, struct net_device *dev) |
465 | { | |
466 | const struct macvlan_dev *vlan = netdev_priv(dev); | |
467 | const struct macvlan_port *port = vlan->port; | |
468 | const struct macvlan_dev *dest; | |
469 | ||
470 | if (vlan->mode == MACVLAN_MODE_BRIDGE) { | |
471 | const struct ethhdr *eth = (void *)skb->data; | |
472 | ||
473 | /* send to other bridge ports directly */ | |
474 | if (is_multicast_ether_addr(eth->h_dest)) { | |
475 | macvlan_broadcast(skb, port, dev, MACVLAN_MODE_BRIDGE); | |
476 | goto xmit_world; | |
477 | } | |
478 | ||
479 | dest = macvlan_hash_lookup(port, eth->h_dest); | |
480 | if (dest && dest->mode == MACVLAN_MODE_BRIDGE) { | |
a37dd333 | 481 | /* send to lowerdev first for its network taps */ |
cb2d0f3e | 482 | dev_forward_skb(vlan->lowerdev, skb); |
618e1b74 AB |
483 | |
484 | return NET_XMIT_SUCCESS; | |
485 | } | |
486 | } | |
487 | ||
488 | xmit_world: | |
59b9997b | 489 | skb->dev = vlan->lowerdev; |
618e1b74 AB |
490 | return dev_queue_xmit(skb); |
491 | } | |
492 | ||
688cea83 | 493 | static inline netdev_tx_t macvlan_netpoll_send_skb(struct macvlan_dev *vlan, struct sk_buff *skb) |
494 | { | |
495 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
496 | if (vlan->netpoll) | |
497 | netpoll_send_skb(vlan->netpoll, skb); | |
498 | #else | |
499 | BUG(); | |
500 | #endif | |
501 | return NETDEV_TX_OK; | |
502 | } | |
503 | ||
0db901bd | 504 | static netdev_tx_t macvlan_start_xmit(struct sk_buff *skb, |
505 | struct net_device *dev) | |
b863ceb7 | 506 | { |
b863ceb7 PM |
507 | unsigned int len = skb->len; |
508 | int ret; | |
688cea83 | 509 | struct macvlan_dev *vlan = netdev_priv(dev); |
510 | ||
511 | if (unlikely(netpoll_tx_running(dev))) | |
512 | return macvlan_netpoll_send_skb(vlan, skb); | |
b863ceb7 | 513 | |
a6cc0cfa JF |
514 | if (vlan->fwd_priv) { |
515 | skb->dev = vlan->lowerdev; | |
f663dd9a | 516 | ret = dev_queue_xmit_accel(skb, vlan->fwd_priv); |
a6cc0cfa JF |
517 | } else { |
518 | ret = macvlan_queue_xmit(skb, dev); | |
519 | } | |
520 | ||
2d6c9ffc | 521 | if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) { |
cdf3e274 | 522 | struct vlan_pcpu_stats *pcpu_stats; |
2c114553 | 523 | |
8ffab51b ED |
524 | pcpu_stats = this_cpu_ptr(vlan->pcpu_stats); |
525 | u64_stats_update_begin(&pcpu_stats->syncp); | |
526 | pcpu_stats->tx_packets++; | |
527 | pcpu_stats->tx_bytes += len; | |
528 | u64_stats_update_end(&pcpu_stats->syncp); | |
529 | } else { | |
530 | this_cpu_inc(vlan->pcpu_stats->tx_dropped); | |
531 | } | |
cbbef5e1 | 532 | return ret; |
b863ceb7 PM |
533 | } |
534 | ||
535 | static int macvlan_hard_header(struct sk_buff *skb, struct net_device *dev, | |
3b04ddde SH |
536 | unsigned short type, const void *daddr, |
537 | const void *saddr, unsigned len) | |
b863ceb7 PM |
538 | { |
539 | const struct macvlan_dev *vlan = netdev_priv(dev); | |
540 | struct net_device *lowerdev = vlan->lowerdev; | |
541 | ||
0c4e8581 SH |
542 | return dev_hard_header(skb, lowerdev, type, daddr, |
543 | saddr ? : dev->dev_addr, len); | |
b863ceb7 PM |
544 | } |
545 | ||
3b04ddde SH |
546 | static const struct header_ops macvlan_hard_header_ops = { |
547 | .create = macvlan_hard_header, | |
548 | .rebuild = eth_rebuild_header, | |
549 | .parse = eth_header_parse, | |
3b04ddde SH |
550 | .cache = eth_header_cache, |
551 | .cache_update = eth_header_cache_update, | |
552 | }; | |
553 | ||
b13ba1b8 JW |
554 | static struct rtnl_link_ops macvlan_link_ops; |
555 | ||
b863ceb7 PM |
556 | static int macvlan_open(struct net_device *dev) |
557 | { | |
558 | struct macvlan_dev *vlan = netdev_priv(dev); | |
b863ceb7 PM |
559 | struct net_device *lowerdev = vlan->lowerdev; |
560 | int err; | |
561 | ||
eb06acdc | 562 | if (vlan->port->passthru) { |
78738141 MT |
563 | if (!(vlan->flags & MACVLAN_FLAG_NOPROMISC)) { |
564 | err = dev_set_promiscuity(lowerdev, 1); | |
565 | if (err < 0) | |
566 | goto out; | |
567 | } | |
eb06acdc SS |
568 | goto hash_add; |
569 | } | |
570 | ||
b13ba1b8 JW |
571 | if (lowerdev->features & NETIF_F_HW_L2FW_DOFFLOAD && |
572 | dev->rtnl_link_ops == &macvlan_link_ops) { | |
a6cc0cfa JF |
573 | vlan->fwd_priv = |
574 | lowerdev->netdev_ops->ndo_dfwd_add_station(lowerdev, dev); | |
575 | ||
576 | /* If we get a NULL pointer back, or if we get an error | |
577 | * then we should just fall through to the non accelerated path | |
578 | */ | |
579 | if (IS_ERR_OR_NULL(vlan->fwd_priv)) { | |
580 | vlan->fwd_priv = NULL; | |
f663dd9a | 581 | } else |
a6cc0cfa | 582 | return 0; |
a6cc0cfa JF |
583 | } |
584 | ||
f9ac30f0 EB |
585 | err = -EBUSY; |
586 | if (macvlan_addr_busy(vlan->port, dev->dev_addr)) | |
587 | goto out; | |
588 | ||
a748ee24 | 589 | err = dev_uc_add(lowerdev, dev->dev_addr); |
b863ceb7 | 590 | if (err < 0) |
b89fb7da WC |
591 | goto out; |
592 | if (dev->flags & IFF_ALLMULTI) { | |
593 | err = dev_set_allmulti(lowerdev, 1); | |
594 | if (err < 0) | |
595 | goto del_unicast; | |
596 | } | |
eb06acdc SS |
597 | |
598 | hash_add: | |
f9ac30f0 | 599 | macvlan_hash_add(vlan); |
b863ceb7 | 600 | return 0; |
b89fb7da WC |
601 | |
602 | del_unicast: | |
a748ee24 | 603 | dev_uc_del(lowerdev, dev->dev_addr); |
b89fb7da | 604 | out: |
a6cc0cfa JF |
605 | if (vlan->fwd_priv) { |
606 | lowerdev->netdev_ops->ndo_dfwd_del_station(lowerdev, | |
607 | vlan->fwd_priv); | |
608 | vlan->fwd_priv = NULL; | |
609 | } | |
b89fb7da | 610 | return err; |
b863ceb7 PM |
611 | } |
612 | ||
613 | static int macvlan_stop(struct net_device *dev) | |
614 | { | |
615 | struct macvlan_dev *vlan = netdev_priv(dev); | |
616 | struct net_device *lowerdev = vlan->lowerdev; | |
617 | ||
a6cc0cfa JF |
618 | if (vlan->fwd_priv) { |
619 | lowerdev->netdev_ops->ndo_dfwd_del_station(lowerdev, | |
620 | vlan->fwd_priv); | |
621 | vlan->fwd_priv = NULL; | |
622 | return 0; | |
623 | } | |
624 | ||
df8ef8f3 JF |
625 | dev_uc_unsync(lowerdev, dev); |
626 | dev_mc_unsync(lowerdev, dev); | |
627 | ||
eb06acdc | 628 | if (vlan->port->passthru) { |
df8ef8f3 JF |
629 | if (!(vlan->flags & MACVLAN_FLAG_NOPROMISC)) |
630 | dev_set_promiscuity(lowerdev, -1); | |
eb06acdc SS |
631 | goto hash_del; |
632 | } | |
633 | ||
b863ceb7 PM |
634 | if (dev->flags & IFF_ALLMULTI) |
635 | dev_set_allmulti(lowerdev, -1); | |
636 | ||
a748ee24 | 637 | dev_uc_del(lowerdev, dev->dev_addr); |
b863ceb7 | 638 | |
eb06acdc | 639 | hash_del: |
449f4544 | 640 | macvlan_hash_del(vlan, !dev->dismantle); |
b863ceb7 PM |
641 | return 0; |
642 | } | |
643 | ||
e289fd28 | 644 | static int macvlan_sync_address(struct net_device *dev, unsigned char *addr) |
ad5d20a6 PM |
645 | { |
646 | struct macvlan_dev *vlan = netdev_priv(dev); | |
647 | struct net_device *lowerdev = vlan->lowerdev; | |
ad5d20a6 PM |
648 | int err; |
649 | ||
f9ac30f0 EB |
650 | if (!(dev->flags & IFF_UP)) { |
651 | /* Just copy in the new address */ | |
e289fd28 | 652 | ether_addr_copy(dev->dev_addr, addr); |
f9ac30f0 EB |
653 | } else { |
654 | /* Rehash and update the device filters */ | |
e289fd28 | 655 | if (macvlan_addr_busy(vlan->port, addr)) |
f9ac30f0 | 656 | return -EBUSY; |
ad5d20a6 | 657 | |
e289fd28 | 658 | if (!vlan->port->passthru) { |
659 | err = dev_uc_add(lowerdev, addr); | |
660 | if (err) | |
661 | return err; | |
ad5d20a6 | 662 | |
e289fd28 | 663 | dev_uc_del(lowerdev, dev->dev_addr); |
664 | } | |
f9ac30f0 | 665 | |
e289fd28 | 666 | macvlan_hash_change_addr(vlan, addr); |
f9ac30f0 | 667 | } |
ad5d20a6 PM |
668 | return 0; |
669 | } | |
670 | ||
e289fd28 | 671 | static int macvlan_set_mac_address(struct net_device *dev, void *p) |
672 | { | |
673 | struct macvlan_dev *vlan = netdev_priv(dev); | |
674 | struct sockaddr *addr = p; | |
675 | ||
676 | if (!is_valid_ether_addr(addr->sa_data)) | |
677 | return -EADDRNOTAVAIL; | |
678 | ||
679 | if (vlan->mode == MACVLAN_MODE_PASSTHRU) { | |
680 | dev_set_mac_address(vlan->lowerdev, addr); | |
681 | return 0; | |
682 | } | |
683 | ||
684 | return macvlan_sync_address(dev, addr->sa_data); | |
685 | } | |
686 | ||
b863ceb7 PM |
687 | static void macvlan_change_rx_flags(struct net_device *dev, int change) |
688 | { | |
689 | struct macvlan_dev *vlan = netdev_priv(dev); | |
690 | struct net_device *lowerdev = vlan->lowerdev; | |
691 | ||
bbeb0ead PC |
692 | if (dev->flags & IFF_UP) { |
693 | if (change & IFF_ALLMULTI) | |
694 | dev_set_allmulti(lowerdev, dev->flags & IFF_ALLMULTI ? 1 : -1); | |
695 | } | |
b863ceb7 PM |
696 | } |
697 | ||
df8ef8f3 | 698 | static void macvlan_set_mac_lists(struct net_device *dev) |
b863ceb7 PM |
699 | { |
700 | struct macvlan_dev *vlan = netdev_priv(dev); | |
701 | ||
cd431e73 ED |
702 | if (dev->flags & (IFF_PROMISC | IFF_ALLMULTI)) { |
703 | bitmap_fill(vlan->mc_filter, MACVLAN_MC_FILTER_SZ); | |
704 | } else { | |
705 | struct netdev_hw_addr *ha; | |
706 | DECLARE_BITMAP(filter, MACVLAN_MC_FILTER_SZ); | |
707 | ||
708 | bitmap_zero(filter, MACVLAN_MC_FILTER_SZ); | |
709 | netdev_for_each_mc_addr(ha, dev) { | |
3807ff58 | 710 | __set_bit(mc_hash(vlan, ha->addr), filter); |
cd431e73 | 711 | } |
d5270430 | 712 | |
3807ff58 | 713 | __set_bit(mc_hash(vlan, dev->broadcast), filter); |
d5270430 | 714 | |
cd431e73 ED |
715 | bitmap_copy(vlan->mc_filter, filter, MACVLAN_MC_FILTER_SZ); |
716 | } | |
df8ef8f3 | 717 | dev_uc_sync(vlan->lowerdev, dev); |
b863ceb7 PM |
718 | dev_mc_sync(vlan->lowerdev, dev); |
719 | } | |
720 | ||
721 | static int macvlan_change_mtu(struct net_device *dev, int new_mtu) | |
722 | { | |
723 | struct macvlan_dev *vlan = netdev_priv(dev); | |
724 | ||
725 | if (new_mtu < 68 || vlan->lowerdev->mtu < new_mtu) | |
726 | return -EINVAL; | |
727 | dev->mtu = new_mtu; | |
728 | return 0; | |
729 | } | |
730 | ||
731 | /* | |
732 | * macvlan network devices have devices nesting below it and are a special | |
733 | * "super class" of normal network devices; split their locks off into a | |
734 | * separate class since they always nest. | |
735 | */ | |
736 | static struct lock_class_key macvlan_netdev_xmit_lock_key; | |
cf508b12 | 737 | static struct lock_class_key macvlan_netdev_addr_lock_key; |
b863ceb7 | 738 | |
8b4703e9 VY |
739 | #define ALWAYS_ON_FEATURES \ |
740 | (NETIF_F_SG | NETIF_F_GEN_CSUM | NETIF_F_GSO_SOFTWARE | NETIF_F_LLTX) | |
741 | ||
b863ceb7 PM |
742 | #define MACVLAN_FEATURES \ |
743 | (NETIF_F_SG | NETIF_F_ALL_CSUM | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST | \ | |
744 | NETIF_F_GSO | NETIF_F_TSO | NETIF_F_UFO | NETIF_F_GSO_ROBUST | \ | |
8d13e670 | 745 | NETIF_F_TSO_ECN | NETIF_F_TSO6 | NETIF_F_GRO | NETIF_F_RXCSUM | \ |
28d2b136 | 746 | NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_HW_VLAN_STAG_FILTER) |
b863ceb7 PM |
747 | |
748 | #define MACVLAN_STATE_MASK \ | |
749 | ((1<<__LINK_STATE_NOCARRIER) | (1<<__LINK_STATE_DORMANT)) | |
750 | ||
c674ac30 VY |
751 | static int macvlan_get_nest_level(struct net_device *dev) |
752 | { | |
753 | return ((struct macvlan_dev *)netdev_priv(dev))->nest_level; | |
754 | } | |
755 | ||
e8a0464c DM |
756 | static void macvlan_set_lockdep_class_one(struct net_device *dev, |
757 | struct netdev_queue *txq, | |
758 | void *_unused) | |
c773e847 DM |
759 | { |
760 | lockdep_set_class(&txq->_xmit_lock, | |
761 | &macvlan_netdev_xmit_lock_key); | |
762 | } | |
763 | ||
764 | static void macvlan_set_lockdep_class(struct net_device *dev) | |
765 | { | |
c674ac30 VY |
766 | lockdep_set_class_and_subclass(&dev->addr_list_lock, |
767 | &macvlan_netdev_addr_lock_key, | |
768 | macvlan_get_nest_level(dev)); | |
e8a0464c | 769 | netdev_for_each_tx_queue(dev, macvlan_set_lockdep_class_one, NULL); |
c773e847 DM |
770 | } |
771 | ||
b863ceb7 PM |
772 | static int macvlan_init(struct net_device *dev) |
773 | { | |
774 | struct macvlan_dev *vlan = netdev_priv(dev); | |
775 | const struct net_device *lowerdev = vlan->lowerdev; | |
776 | ||
777 | dev->state = (dev->state & ~MACVLAN_STATE_MASK) | | |
778 | (lowerdev->state & MACVLAN_STATE_MASK); | |
779 | dev->features = lowerdev->features & MACVLAN_FEATURES; | |
8b4703e9 | 780 | dev->features |= ALWAYS_ON_FEATURES; |
081e83a7 | 781 | dev->vlan_features = lowerdev->vlan_features & MACVLAN_FEATURES; |
8c2acc53 | 782 | dev->gso_max_size = lowerdev->gso_max_size; |
b863ceb7 | 783 | dev->iflink = lowerdev->ifindex; |
ef5c8996 | 784 | dev->hard_header_len = lowerdev->hard_header_len; |
b863ceb7 | 785 | |
c773e847 DM |
786 | macvlan_set_lockdep_class(dev); |
787 | ||
1c213bd2 | 788 | vlan->pcpu_stats = netdev_alloc_pcpu_stats(struct vlan_pcpu_stats); |
8ffab51b | 789 | if (!vlan->pcpu_stats) |
fccaf710 ED |
790 | return -ENOMEM; |
791 | ||
b863ceb7 PM |
792 | return 0; |
793 | } | |
794 | ||
fccaf710 ED |
795 | static void macvlan_uninit(struct net_device *dev) |
796 | { | |
797 | struct macvlan_dev *vlan = netdev_priv(dev); | |
d5cd9244 | 798 | struct macvlan_port *port = vlan->port; |
fccaf710 | 799 | |
8ffab51b | 800 | free_percpu(vlan->pcpu_stats); |
d5cd9244 | 801 | |
79cf79ab | 802 | macvlan_flush_sources(port, vlan); |
5e3c516b DM |
803 | port->count -= 1; |
804 | if (!port->count) | |
d5cd9244 | 805 | macvlan_port_destroy(port->dev); |
fccaf710 ED |
806 | } |
807 | ||
28172739 ED |
808 | static struct rtnl_link_stats64 *macvlan_dev_get_stats64(struct net_device *dev, |
809 | struct rtnl_link_stats64 *stats) | |
fccaf710 | 810 | { |
fccaf710 ED |
811 | struct macvlan_dev *vlan = netdev_priv(dev); |
812 | ||
8ffab51b | 813 | if (vlan->pcpu_stats) { |
cdf3e274 | 814 | struct vlan_pcpu_stats *p; |
8ffab51b ED |
815 | u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes; |
816 | u32 rx_errors = 0, tx_dropped = 0; | |
bc66154e | 817 | unsigned int start; |
fccaf710 ED |
818 | int i; |
819 | ||
820 | for_each_possible_cpu(i) { | |
8ffab51b | 821 | p = per_cpu_ptr(vlan->pcpu_stats, i); |
bc66154e | 822 | do { |
57a7744e | 823 | start = u64_stats_fetch_begin_irq(&p->syncp); |
bc66154e ED |
824 | rx_packets = p->rx_packets; |
825 | rx_bytes = p->rx_bytes; | |
826 | rx_multicast = p->rx_multicast; | |
8ffab51b ED |
827 | tx_packets = p->tx_packets; |
828 | tx_bytes = p->tx_bytes; | |
57a7744e | 829 | } while (u64_stats_fetch_retry_irq(&p->syncp, start)); |
8ffab51b ED |
830 | |
831 | stats->rx_packets += rx_packets; | |
832 | stats->rx_bytes += rx_bytes; | |
833 | stats->multicast += rx_multicast; | |
834 | stats->tx_packets += tx_packets; | |
835 | stats->tx_bytes += tx_bytes; | |
836 | /* rx_errors & tx_dropped are u32, updated | |
837 | * without syncp protection. | |
838 | */ | |
839 | rx_errors += p->rx_errors; | |
840 | tx_dropped += p->tx_dropped; | |
fccaf710 | 841 | } |
8ffab51b ED |
842 | stats->rx_errors = rx_errors; |
843 | stats->rx_dropped = rx_errors; | |
844 | stats->tx_dropped = tx_dropped; | |
fccaf710 ED |
845 | } |
846 | return stats; | |
847 | } | |
848 | ||
8e586137 | 849 | static int macvlan_vlan_rx_add_vid(struct net_device *dev, |
80d5c368 | 850 | __be16 proto, u16 vid) |
8d13e670 JF |
851 | { |
852 | struct macvlan_dev *vlan = netdev_priv(dev); | |
853 | struct net_device *lowerdev = vlan->lowerdev; | |
8d13e670 | 854 | |
80d5c368 | 855 | return vlan_vid_add(lowerdev, proto, vid); |
8d13e670 JF |
856 | } |
857 | ||
8e586137 | 858 | static int macvlan_vlan_rx_kill_vid(struct net_device *dev, |
80d5c368 | 859 | __be16 proto, u16 vid) |
8d13e670 JF |
860 | { |
861 | struct macvlan_dev *vlan = netdev_priv(dev); | |
862 | struct net_device *lowerdev = vlan->lowerdev; | |
8d13e670 | 863 | |
80d5c368 | 864 | vlan_vid_del(lowerdev, proto, vid); |
8e586137 | 865 | return 0; |
8d13e670 JF |
866 | } |
867 | ||
edc7d573 | 868 | static int macvlan_fdb_add(struct ndmsg *ndm, struct nlattr *tb[], |
df8ef8f3 | 869 | struct net_device *dev, |
6b6e2725 | 870 | const unsigned char *addr, |
df8ef8f3 JF |
871 | u16 flags) |
872 | { | |
873 | struct macvlan_dev *vlan = netdev_priv(dev); | |
874 | int err = -EINVAL; | |
875 | ||
8a50f11c VY |
876 | /* Support unicast filter only on passthru devices. |
877 | * Multicast filter should be allowed on all devices. | |
878 | */ | |
879 | if (!vlan->port->passthru && is_unicast_ether_addr(addr)) | |
df8ef8f3 JF |
880 | return -EOPNOTSUPP; |
881 | ||
ab2cfbb2 TR |
882 | if (flags & NLM_F_REPLACE) |
883 | return -EOPNOTSUPP; | |
884 | ||
df8ef8f3 JF |
885 | if (is_unicast_ether_addr(addr)) |
886 | err = dev_uc_add_excl(dev, addr); | |
887 | else if (is_multicast_ether_addr(addr)) | |
888 | err = dev_mc_add_excl(dev, addr); | |
889 | ||
890 | return err; | |
891 | } | |
892 | ||
1690be63 | 893 | static int macvlan_fdb_del(struct ndmsg *ndm, struct nlattr *tb[], |
df8ef8f3 | 894 | struct net_device *dev, |
6b6e2725 | 895 | const unsigned char *addr) |
df8ef8f3 JF |
896 | { |
897 | struct macvlan_dev *vlan = netdev_priv(dev); | |
898 | int err = -EINVAL; | |
899 | ||
8a50f11c VY |
900 | /* Support unicast filter only on passthru devices. |
901 | * Multicast filter should be allowed on all devices. | |
902 | */ | |
903 | if (!vlan->port->passthru && is_unicast_ether_addr(addr)) | |
df8ef8f3 JF |
904 | return -EOPNOTSUPP; |
905 | ||
906 | if (is_unicast_ether_addr(addr)) | |
907 | err = dev_uc_del(dev, addr); | |
908 | else if (is_multicast_ether_addr(addr)) | |
909 | err = dev_mc_del(dev, addr); | |
910 | ||
911 | return err; | |
912 | } | |
913 | ||
b863ceb7 PM |
914 | static void macvlan_ethtool_get_drvinfo(struct net_device *dev, |
915 | struct ethtool_drvinfo *drvinfo) | |
916 | { | |
7826d43f JP |
917 | strlcpy(drvinfo->driver, "macvlan", sizeof(drvinfo->driver)); |
918 | strlcpy(drvinfo->version, "0.1", sizeof(drvinfo->version)); | |
b863ceb7 PM |
919 | } |
920 | ||
9edb8bb6 SH |
921 | static int macvlan_ethtool_get_settings(struct net_device *dev, |
922 | struct ethtool_cmd *cmd) | |
923 | { | |
924 | const struct macvlan_dev *vlan = netdev_priv(dev); | |
4bc71cb9 JP |
925 | |
926 | return __ethtool_get_settings(vlan->lowerdev, cmd); | |
9edb8bb6 SH |
927 | } |
928 | ||
2be5c767 VY |
929 | static netdev_features_t macvlan_fix_features(struct net_device *dev, |
930 | netdev_features_t features) | |
931 | { | |
932 | struct macvlan_dev *vlan = netdev_priv(dev); | |
797f87f8 | 933 | netdev_features_t mask; |
2be5c767 | 934 | |
797f87f8 FW |
935 | features |= NETIF_F_ALL_FOR_ALL; |
936 | features &= (vlan->set_features | ~MACVLAN_FEATURES); | |
937 | mask = features; | |
938 | ||
939 | features = netdev_increment_features(vlan->lowerdev->features, | |
940 | features, | |
941 | mask); | |
8b4703e9 | 942 | features |= ALWAYS_ON_FEATURES; |
0d0162e7 | 943 | features &= ~NETIF_F_NETNS_LOCAL; |
797f87f8 FW |
944 | |
945 | return features; | |
2be5c767 VY |
946 | } |
947 | ||
688cea83 | 948 | #ifdef CONFIG_NET_POLL_CONTROLLER |
949 | static void macvlan_dev_poll_controller(struct net_device *dev) | |
950 | { | |
951 | return; | |
952 | } | |
953 | ||
954 | static int macvlan_dev_netpoll_setup(struct net_device *dev, struct netpoll_info *npinfo) | |
955 | { | |
956 | struct macvlan_dev *vlan = netdev_priv(dev); | |
957 | struct net_device *real_dev = vlan->lowerdev; | |
958 | struct netpoll *netpoll; | |
959 | int err = 0; | |
960 | ||
961 | netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL); | |
962 | err = -ENOMEM; | |
963 | if (!netpoll) | |
964 | goto out; | |
965 | ||
966 | err = __netpoll_setup(netpoll, real_dev); | |
967 | if (err) { | |
968 | kfree(netpoll); | |
969 | goto out; | |
970 | } | |
971 | ||
972 | vlan->netpoll = netpoll; | |
973 | ||
974 | out: | |
975 | return err; | |
976 | } | |
977 | ||
978 | static void macvlan_dev_netpoll_cleanup(struct net_device *dev) | |
979 | { | |
980 | struct macvlan_dev *vlan = netdev_priv(dev); | |
981 | struct netpoll *netpoll = vlan->netpoll; | |
982 | ||
983 | if (!netpoll) | |
984 | return; | |
985 | ||
986 | vlan->netpoll = NULL; | |
987 | ||
988 | __netpoll_free_async(netpoll); | |
989 | } | |
990 | #endif /* CONFIG_NET_POLL_CONTROLLER */ | |
991 | ||
b863ceb7 PM |
992 | static const struct ethtool_ops macvlan_ethtool_ops = { |
993 | .get_link = ethtool_op_get_link, | |
9edb8bb6 | 994 | .get_settings = macvlan_ethtool_get_settings, |
b863ceb7 PM |
995 | .get_drvinfo = macvlan_ethtool_get_drvinfo, |
996 | }; | |
997 | ||
54a30c97 SH |
998 | static const struct net_device_ops macvlan_netdev_ops = { |
999 | .ndo_init = macvlan_init, | |
fccaf710 | 1000 | .ndo_uninit = macvlan_uninit, |
54a30c97 SH |
1001 | .ndo_open = macvlan_open, |
1002 | .ndo_stop = macvlan_stop, | |
00829823 | 1003 | .ndo_start_xmit = macvlan_start_xmit, |
54a30c97 | 1004 | .ndo_change_mtu = macvlan_change_mtu, |
2be5c767 | 1005 | .ndo_fix_features = macvlan_fix_features, |
54a30c97 SH |
1006 | .ndo_change_rx_flags = macvlan_change_rx_flags, |
1007 | .ndo_set_mac_address = macvlan_set_mac_address, | |
df8ef8f3 | 1008 | .ndo_set_rx_mode = macvlan_set_mac_lists, |
bc66154e | 1009 | .ndo_get_stats64 = macvlan_dev_get_stats64, |
54a30c97 | 1010 | .ndo_validate_addr = eth_validate_addr, |
8d13e670 JF |
1011 | .ndo_vlan_rx_add_vid = macvlan_vlan_rx_add_vid, |
1012 | .ndo_vlan_rx_kill_vid = macvlan_vlan_rx_kill_vid, | |
df8ef8f3 JF |
1013 | .ndo_fdb_add = macvlan_fdb_add, |
1014 | .ndo_fdb_del = macvlan_fdb_del, | |
1015 | .ndo_fdb_dump = ndo_dflt_fdb_dump, | |
c674ac30 | 1016 | .ndo_get_lock_subclass = macvlan_get_nest_level, |
688cea83 | 1017 | #ifdef CONFIG_NET_POLL_CONTROLLER |
1018 | .ndo_poll_controller = macvlan_dev_poll_controller, | |
1019 | .ndo_netpoll_setup = macvlan_dev_netpoll_setup, | |
1020 | .ndo_netpoll_cleanup = macvlan_dev_netpoll_cleanup, | |
1021 | #endif | |
54a30c97 SH |
1022 | }; |
1023 | ||
8a35747a | 1024 | void macvlan_common_setup(struct net_device *dev) |
b863ceb7 PM |
1025 | { |
1026 | ether_setup(dev); | |
1027 | ||
02875878 ED |
1028 | dev->priv_flags &= ~IFF_TX_SKB_SHARING; |
1029 | netif_keep_dst(dev); | |
87ab7f6f | 1030 | dev->priv_flags |= IFF_UNICAST_FLT; |
54a30c97 | 1031 | dev->netdev_ops = &macvlan_netdev_ops; |
b863ceb7 | 1032 | dev->destructor = free_netdev; |
71740129 | 1033 | dev->header_ops = &macvlan_hard_header_ops; |
b863ceb7 | 1034 | dev->ethtool_ops = &macvlan_ethtool_ops; |
8a35747a HX |
1035 | } |
1036 | EXPORT_SYMBOL_GPL(macvlan_common_setup); | |
1037 | ||
1038 | static void macvlan_setup(struct net_device *dev) | |
1039 | { | |
1040 | macvlan_common_setup(dev); | |
b863ceb7 PM |
1041 | dev->tx_queue_len = 0; |
1042 | } | |
1043 | ||
1044 | static int macvlan_port_create(struct net_device *dev) | |
1045 | { | |
1046 | struct macvlan_port *port; | |
1047 | unsigned int i; | |
ab95bfe0 | 1048 | int err; |
b863ceb7 PM |
1049 | |
1050 | if (dev->type != ARPHRD_ETHER || dev->flags & IFF_LOOPBACK) | |
1051 | return -EINVAL; | |
1052 | ||
1053 | port = kzalloc(sizeof(*port), GFP_KERNEL); | |
1054 | if (port == NULL) | |
1055 | return -ENOMEM; | |
1056 | ||
eb06acdc | 1057 | port->passthru = false; |
b863ceb7 PM |
1058 | port->dev = dev; |
1059 | INIT_LIST_HEAD(&port->vlans); | |
1060 | for (i = 0; i < MACVLAN_HASH_SIZE; i++) | |
1061 | INIT_HLIST_HEAD(&port->vlan_hash[i]); | |
79cf79ab MB |
1062 | for (i = 0; i < MACVLAN_HASH_SIZE; i++) |
1063 | INIT_HLIST_HEAD(&port->vlan_source_hash[i]); | |
ab95bfe0 | 1064 | |
412ca155 HX |
1065 | skb_queue_head_init(&port->bc_queue); |
1066 | INIT_WORK(&port->bc_work, macvlan_process_broadcast); | |
1067 | ||
a35e2c1b JP |
1068 | err = netdev_rx_handler_register(dev, macvlan_handle_frame, port); |
1069 | if (err) | |
ab95bfe0 | 1070 | kfree(port); |
d9351561 ED |
1071 | else |
1072 | dev->priv_flags |= IFF_MACVLAN_PORT; | |
ab95bfe0 | 1073 | return err; |
b863ceb7 PM |
1074 | } |
1075 | ||
1076 | static void macvlan_port_destroy(struct net_device *dev) | |
1077 | { | |
e052f7e6 | 1078 | struct macvlan_port *port = macvlan_port_get_rtnl(dev); |
b863ceb7 | 1079 | |
412ca155 | 1080 | cancel_work_sync(&port->bc_work); |
a35e2c1b | 1081 | dev->priv_flags &= ~IFF_MACVLAN_PORT; |
ab95bfe0 | 1082 | netdev_rx_handler_unregister(dev); |
6e070aec | 1083 | kfree_rcu(port, rcu); |
b863ceb7 PM |
1084 | } |
1085 | ||
b863ceb7 PM |
1086 | static int macvlan_validate(struct nlattr *tb[], struct nlattr *data[]) |
1087 | { | |
1088 | if (tb[IFLA_ADDRESS]) { | |
1089 | if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) | |
1090 | return -EINVAL; | |
1091 | if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) | |
1092 | return -EADDRNOTAVAIL; | |
1093 | } | |
27c0b1a8 | 1094 | |
15127478 MT |
1095 | if (data && data[IFLA_MACVLAN_FLAGS] && |
1096 | nla_get_u16(data[IFLA_MACVLAN_FLAGS]) & ~MACVLAN_FLAG_NOPROMISC) | |
1097 | return -EINVAL; | |
1098 | ||
27c0b1a8 AB |
1099 | if (data && data[IFLA_MACVLAN_MODE]) { |
1100 | switch (nla_get_u32(data[IFLA_MACVLAN_MODE])) { | |
1101 | case MACVLAN_MODE_PRIVATE: | |
1102 | case MACVLAN_MODE_VEPA: | |
1103 | case MACVLAN_MODE_BRIDGE: | |
eb06acdc | 1104 | case MACVLAN_MODE_PASSTHRU: |
79cf79ab MB |
1105 | case MACVLAN_MODE_SOURCE: |
1106 | break; | |
1107 | default: | |
1108 | return -EINVAL; | |
1109 | } | |
1110 | } | |
1111 | ||
1112 | if (data && data[IFLA_MACVLAN_MACADDR_MODE]) { | |
1113 | switch (nla_get_u32(data[IFLA_MACVLAN_MACADDR_MODE])) { | |
1114 | case MACVLAN_MACADDR_ADD: | |
1115 | case MACVLAN_MACADDR_DEL: | |
1116 | case MACVLAN_MACADDR_FLUSH: | |
1117 | case MACVLAN_MACADDR_SET: | |
27c0b1a8 AB |
1118 | break; |
1119 | default: | |
1120 | return -EINVAL; | |
1121 | } | |
1122 | } | |
79cf79ab MB |
1123 | |
1124 | if (data && data[IFLA_MACVLAN_MACADDR]) { | |
1125 | if (nla_len(data[IFLA_MACVLAN_MACADDR]) != ETH_ALEN) | |
1126 | return -EINVAL; | |
1127 | ||
1128 | if (!is_valid_ether_addr(nla_data(data[IFLA_MACVLAN_MACADDR]))) | |
1129 | return -EADDRNOTAVAIL; | |
1130 | } | |
1131 | ||
1132 | if (data && data[IFLA_MACVLAN_MACADDR_COUNT]) | |
1133 | return -EINVAL; | |
1134 | ||
1135 | return 0; | |
1136 | } | |
1137 | ||
1138 | /** | |
1139 | * reconfigure list of remote source mac address | |
1140 | * (only for macvlan devices in source mode) | |
1141 | * Note regarding alignment: all netlink data is aligned to 4 Byte, which | |
1142 | * suffices for both ether_addr_copy and ether_addr_equal_64bits usage. | |
1143 | */ | |
1144 | static int macvlan_changelink_sources(struct macvlan_dev *vlan, u32 mode, | |
1145 | struct nlattr *data[]) | |
1146 | { | |
1147 | char *addr = NULL; | |
1148 | int ret, rem, len; | |
1149 | struct nlattr *nla, *head; | |
1150 | struct macvlan_source_entry *entry; | |
1151 | ||
1152 | if (data[IFLA_MACVLAN_MACADDR]) | |
1153 | addr = nla_data(data[IFLA_MACVLAN_MACADDR]); | |
1154 | ||
1155 | if (mode == MACVLAN_MACADDR_ADD) { | |
1156 | if (!addr) | |
1157 | return -EINVAL; | |
1158 | ||
1159 | return macvlan_hash_add_source(vlan, addr); | |
1160 | ||
1161 | } else if (mode == MACVLAN_MACADDR_DEL) { | |
1162 | if (!addr) | |
1163 | return -EINVAL; | |
1164 | ||
1165 | entry = macvlan_hash_lookup_source(vlan, addr); | |
1166 | if (entry) { | |
1167 | macvlan_hash_del_source(entry); | |
1168 | vlan->macaddr_count--; | |
1169 | } | |
1170 | } else if (mode == MACVLAN_MACADDR_FLUSH) { | |
1171 | macvlan_flush_sources(vlan->port, vlan); | |
1172 | } else if (mode == MACVLAN_MACADDR_SET) { | |
1173 | macvlan_flush_sources(vlan->port, vlan); | |
1174 | ||
1175 | if (addr) { | |
1176 | ret = macvlan_hash_add_source(vlan, addr); | |
1177 | if (ret) | |
1178 | return ret; | |
1179 | } | |
1180 | ||
1181 | if (!data || !data[IFLA_MACVLAN_MACADDR_DATA]) | |
1182 | return 0; | |
1183 | ||
1184 | head = nla_data(data[IFLA_MACVLAN_MACADDR_DATA]); | |
1185 | len = nla_len(data[IFLA_MACVLAN_MACADDR_DATA]); | |
1186 | ||
1187 | nla_for_each_attr(nla, head, len, rem) { | |
1188 | if (nla_type(nla) != IFLA_MACVLAN_MACADDR || | |
1189 | nla_len(nla) != ETH_ALEN) | |
1190 | continue; | |
1191 | ||
1192 | addr = nla_data(nla); | |
1193 | ret = macvlan_hash_add_source(vlan, addr); | |
1194 | if (ret) | |
1195 | return ret; | |
1196 | } | |
1197 | } else { | |
1198 | return -EINVAL; | |
1199 | } | |
1200 | ||
b863ceb7 PM |
1201 | return 0; |
1202 | } | |
1203 | ||
fc0663d6 | 1204 | int macvlan_common_newlink(struct net *src_net, struct net_device *dev, |
2f6a1b66 | 1205 | struct nlattr *tb[], struct nlattr *data[]) |
b863ceb7 PM |
1206 | { |
1207 | struct macvlan_dev *vlan = netdev_priv(dev); | |
1208 | struct macvlan_port *port; | |
1209 | struct net_device *lowerdev; | |
1210 | int err; | |
79cf79ab | 1211 | int macmode; |
b863ceb7 PM |
1212 | |
1213 | if (!tb[IFLA_LINK]) | |
1214 | return -EINVAL; | |
1215 | ||
81adee47 | 1216 | lowerdev = __dev_get_by_index(src_net, nla_get_u32(tb[IFLA_LINK])); |
b863ceb7 PM |
1217 | if (lowerdev == NULL) |
1218 | return -ENODEV; | |
1219 | ||
d70f2cf5 | 1220 | /* When creating macvlans or macvtaps on top of other macvlans - use |
b0832a29 | 1221 | * the real device as the lowerdev. |
a6ca5f1d | 1222 | */ |
d70f2cf5 KW |
1223 | if (netif_is_macvlan(lowerdev)) |
1224 | lowerdev = macvlan_dev_real_dev(lowerdev); | |
a6ca5f1d | 1225 | |
b863ceb7 PM |
1226 | if (!tb[IFLA_MTU]) |
1227 | dev->mtu = lowerdev->mtu; | |
1228 | else if (dev->mtu > lowerdev->mtu) | |
1229 | return -EINVAL; | |
1230 | ||
1231 | if (!tb[IFLA_ADDRESS]) | |
7ce5d222 | 1232 | eth_hw_addr_random(dev); |
b863ceb7 | 1233 | |
a35e2c1b | 1234 | if (!macvlan_port_exists(lowerdev)) { |
b863ceb7 PM |
1235 | err = macvlan_port_create(lowerdev); |
1236 | if (err < 0) | |
1237 | return err; | |
1238 | } | |
e052f7e6 | 1239 | port = macvlan_port_get_rtnl(lowerdev); |
b863ceb7 | 1240 | |
eb06acdc SS |
1241 | /* Only 1 macvlan device can be created in passthru mode */ |
1242 | if (port->passthru) | |
1243 | return -EINVAL; | |
1244 | ||
b863ceb7 PM |
1245 | vlan->lowerdev = lowerdev; |
1246 | vlan->dev = dev; | |
1247 | vlan->port = port; | |
2be5c767 | 1248 | vlan->set_features = MACVLAN_FEATURES; |
c674ac30 | 1249 | vlan->nest_level = dev_get_nest_level(lowerdev, netif_is_macvlan) + 1; |
b863ceb7 | 1250 | |
27c0b1a8 AB |
1251 | vlan->mode = MACVLAN_MODE_VEPA; |
1252 | if (data && data[IFLA_MACVLAN_MODE]) | |
1253 | vlan->mode = nla_get_u32(data[IFLA_MACVLAN_MODE]); | |
1254 | ||
df8ef8f3 JF |
1255 | if (data && data[IFLA_MACVLAN_FLAGS]) |
1256 | vlan->flags = nla_get_u16(data[IFLA_MACVLAN_FLAGS]); | |
1257 | ||
eb06acdc | 1258 | if (vlan->mode == MACVLAN_MODE_PASSTHRU) { |
5e3c516b | 1259 | if (port->count) |
eb06acdc SS |
1260 | return -EINVAL; |
1261 | port->passthru = true; | |
8b98604e | 1262 | eth_hw_addr_inherit(dev, lowerdev); |
eb06acdc SS |
1263 | } |
1264 | ||
79cf79ab MB |
1265 | if (data && data[IFLA_MACVLAN_MACADDR_MODE]) { |
1266 | if (vlan->mode != MACVLAN_MODE_SOURCE) | |
1267 | return -EINVAL; | |
1268 | macmode = nla_get_u32(data[IFLA_MACVLAN_MACADDR_MODE]); | |
1269 | err = macvlan_changelink_sources(vlan, macmode, data); | |
1270 | if (err) | |
1271 | return err; | |
1272 | } | |
1273 | ||
5e3c516b | 1274 | port->count += 1; |
47d4ab91 JF |
1275 | err = register_netdevice(dev); |
1276 | if (err < 0) | |
1277 | goto destroy_port; | |
1278 | ||
a6cc0cfa | 1279 | dev->priv_flags |= IFF_MACVLAN; |
7cd43db7 JP |
1280 | err = netdev_upper_dev_link(lowerdev, dev); |
1281 | if (err) | |
da37705c | 1282 | goto unregister_netdev; |
b863ceb7 | 1283 | |
233c7df0 | 1284 | list_add_tail_rcu(&vlan->list, &port->vlans); |
fc4a7489 | 1285 | netif_stacked_transfer_operstate(lowerdev, dev); |
f16d3d57 | 1286 | |
b863ceb7 | 1287 | return 0; |
f16d3d57 | 1288 | |
da37705c CW |
1289 | unregister_netdev: |
1290 | unregister_netdevice(dev); | |
f16d3d57 | 1291 | destroy_port: |
5e3c516b DM |
1292 | port->count -= 1; |
1293 | if (!port->count) | |
f16d3d57 JP |
1294 | macvlan_port_destroy(lowerdev); |
1295 | ||
1296 | return err; | |
b863ceb7 | 1297 | } |
fc0663d6 | 1298 | EXPORT_SYMBOL_GPL(macvlan_common_newlink); |
b863ceb7 | 1299 | |
fc0663d6 AB |
1300 | static int macvlan_newlink(struct net *src_net, struct net_device *dev, |
1301 | struct nlattr *tb[], struct nlattr *data[]) | |
1302 | { | |
2f6a1b66 | 1303 | return macvlan_common_newlink(src_net, dev, tb, data); |
fc0663d6 AB |
1304 | } |
1305 | ||
1306 | void macvlan_dellink(struct net_device *dev, struct list_head *head) | |
b863ceb7 PM |
1307 | { |
1308 | struct macvlan_dev *vlan = netdev_priv(dev); | |
b863ceb7 | 1309 | |
79cf79ab MB |
1310 | if (vlan->mode == MACVLAN_MODE_SOURCE) |
1311 | macvlan_flush_sources(vlan->port, vlan); | |
233c7df0 | 1312 | list_del_rcu(&vlan->list); |
23289a37 | 1313 | unregister_netdevice_queue(dev, head); |
7cd43db7 | 1314 | netdev_upper_dev_unlink(vlan->lowerdev, dev); |
b863ceb7 | 1315 | } |
fc0663d6 | 1316 | EXPORT_SYMBOL_GPL(macvlan_dellink); |
b863ceb7 | 1317 | |
27c0b1a8 AB |
1318 | static int macvlan_changelink(struct net_device *dev, |
1319 | struct nlattr *tb[], struct nlattr *data[]) | |
1320 | { | |
1321 | struct macvlan_dev *vlan = netdev_priv(dev); | |
266e8347 MT |
1322 | enum macvlan_mode mode; |
1323 | bool set_mode = false; | |
79cf79ab MB |
1324 | enum macvlan_macaddr_mode macmode; |
1325 | int ret; | |
266e8347 MT |
1326 | |
1327 | /* Validate mode, but don't set yet: setting flags may fail. */ | |
1328 | if (data && data[IFLA_MACVLAN_MODE]) { | |
1329 | set_mode = true; | |
1330 | mode = nla_get_u32(data[IFLA_MACVLAN_MODE]); | |
1331 | /* Passthrough mode can't be set or cleared dynamically */ | |
1332 | if ((mode == MACVLAN_MODE_PASSTHRU) != | |
1333 | (vlan->mode == MACVLAN_MODE_PASSTHRU)) | |
1334 | return -EINVAL; | |
79cf79ab MB |
1335 | if (vlan->mode == MACVLAN_MODE_SOURCE && |
1336 | vlan->mode != mode) | |
1337 | macvlan_flush_sources(vlan->port, vlan); | |
266e8347 | 1338 | } |
99ffc3e7 | 1339 | |
df8ef8f3 JF |
1340 | if (data && data[IFLA_MACVLAN_FLAGS]) { |
1341 | __u16 flags = nla_get_u16(data[IFLA_MACVLAN_FLAGS]); | |
1342 | bool promisc = (flags ^ vlan->flags) & MACVLAN_FLAG_NOPROMISC; | |
99ffc3e7 MT |
1343 | if (vlan->port->passthru && promisc) { |
1344 | int err; | |
1345 | ||
1346 | if (flags & MACVLAN_FLAG_NOPROMISC) | |
1347 | err = dev_set_promiscuity(vlan->lowerdev, -1); | |
1348 | else | |
1349 | err = dev_set_promiscuity(vlan->lowerdev, 1); | |
1350 | if (err < 0) | |
1351 | return err; | |
1352 | } | |
df8ef8f3 JF |
1353 | vlan->flags = flags; |
1354 | } | |
266e8347 MT |
1355 | if (set_mode) |
1356 | vlan->mode = mode; | |
79cf79ab MB |
1357 | if (data && data[IFLA_MACVLAN_MACADDR_MODE]) { |
1358 | if (vlan->mode != MACVLAN_MODE_SOURCE) | |
1359 | return -EINVAL; | |
1360 | macmode = nla_get_u32(data[IFLA_MACVLAN_MACADDR_MODE]); | |
1361 | ret = macvlan_changelink_sources(vlan, macmode, data); | |
1362 | if (ret) | |
1363 | return ret; | |
1364 | } | |
27c0b1a8 AB |
1365 | return 0; |
1366 | } | |
1367 | ||
79cf79ab MB |
1368 | static size_t macvlan_get_size_mac(const struct macvlan_dev *vlan) |
1369 | { | |
1370 | if (vlan->macaddr_count == 0) | |
1371 | return 0; | |
1372 | return nla_total_size(0) /* IFLA_MACVLAN_MACADDR_DATA */ | |
1373 | + vlan->macaddr_count * nla_total_size(sizeof(u8) * ETH_ALEN); | |
1374 | } | |
1375 | ||
27c0b1a8 AB |
1376 | static size_t macvlan_get_size(const struct net_device *dev) |
1377 | { | |
79cf79ab MB |
1378 | struct macvlan_dev *vlan = netdev_priv(dev); |
1379 | ||
01fe944f ED |
1380 | return (0 |
1381 | + nla_total_size(4) /* IFLA_MACVLAN_MODE */ | |
1382 | + nla_total_size(2) /* IFLA_MACVLAN_FLAGS */ | |
79cf79ab MB |
1383 | + nla_total_size(4) /* IFLA_MACVLAN_MACADDR_COUNT */ |
1384 | + macvlan_get_size_mac(vlan) /* IFLA_MACVLAN_MACADDR */ | |
01fe944f | 1385 | ); |
27c0b1a8 AB |
1386 | } |
1387 | ||
79cf79ab MB |
1388 | static int macvlan_fill_info_macaddr(struct sk_buff *skb, |
1389 | const struct macvlan_dev *vlan, | |
1390 | const int i) | |
1391 | { | |
1392 | struct hlist_head *h = &vlan->port->vlan_source_hash[i]; | |
1393 | struct macvlan_source_entry *entry; | |
1394 | ||
1395 | hlist_for_each_entry_rcu(entry, h, hlist) { | |
1396 | if (entry->vlan != vlan) | |
1397 | continue; | |
1398 | if (nla_put(skb, IFLA_MACVLAN_MACADDR, ETH_ALEN, entry->addr)) | |
1399 | return 1; | |
1400 | } | |
1401 | return 0; | |
1402 | } | |
1403 | ||
27c0b1a8 AB |
1404 | static int macvlan_fill_info(struct sk_buff *skb, |
1405 | const struct net_device *dev) | |
1406 | { | |
1407 | struct macvlan_dev *vlan = netdev_priv(dev); | |
79cf79ab MB |
1408 | int i; |
1409 | struct nlattr *nest; | |
27c0b1a8 | 1410 | |
ead9a76c DM |
1411 | if (nla_put_u32(skb, IFLA_MACVLAN_MODE, vlan->mode)) |
1412 | goto nla_put_failure; | |
df8ef8f3 JF |
1413 | if (nla_put_u16(skb, IFLA_MACVLAN_FLAGS, vlan->flags)) |
1414 | goto nla_put_failure; | |
79cf79ab MB |
1415 | if (nla_put_u32(skb, IFLA_MACVLAN_MACADDR_COUNT, vlan->macaddr_count)) |
1416 | goto nla_put_failure; | |
1417 | if (vlan->macaddr_count > 0) { | |
1418 | nest = nla_nest_start(skb, IFLA_MACVLAN_MACADDR_DATA); | |
1419 | if (nest == NULL) | |
1420 | goto nla_put_failure; | |
1421 | ||
1422 | for (i = 0; i < MACVLAN_HASH_SIZE; i++) { | |
1423 | if (macvlan_fill_info_macaddr(skb, vlan, i)) | |
1424 | goto nla_put_failure; | |
1425 | } | |
1426 | nla_nest_end(skb, nest); | |
1427 | } | |
27c0b1a8 AB |
1428 | return 0; |
1429 | ||
1430 | nla_put_failure: | |
1431 | return -EMSGSIZE; | |
1432 | } | |
1433 | ||
1434 | static const struct nla_policy macvlan_policy[IFLA_MACVLAN_MAX + 1] = { | |
df8ef8f3 JF |
1435 | [IFLA_MACVLAN_MODE] = { .type = NLA_U32 }, |
1436 | [IFLA_MACVLAN_FLAGS] = { .type = NLA_U16 }, | |
79cf79ab MB |
1437 | [IFLA_MACVLAN_MACADDR_MODE] = { .type = NLA_U32 }, |
1438 | [IFLA_MACVLAN_MACADDR] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN }, | |
1439 | [IFLA_MACVLAN_MACADDR_DATA] = { .type = NLA_NESTED }, | |
1440 | [IFLA_MACVLAN_MACADDR_COUNT] = { .type = NLA_U32 }, | |
27c0b1a8 AB |
1441 | }; |
1442 | ||
fc0663d6 AB |
1443 | int macvlan_link_register(struct rtnl_link_ops *ops) |
1444 | { | |
1445 | /* common fields */ | |
1446 | ops->priv_size = sizeof(struct macvlan_dev); | |
fc0663d6 AB |
1447 | ops->validate = macvlan_validate; |
1448 | ops->maxtype = IFLA_MACVLAN_MAX; | |
1449 | ops->policy = macvlan_policy; | |
1450 | ops->changelink = macvlan_changelink; | |
1451 | ops->get_size = macvlan_get_size; | |
1452 | ops->fill_info = macvlan_fill_info; | |
1453 | ||
1454 | return rtnl_link_register(ops); | |
1455 | }; | |
1456 | EXPORT_SYMBOL_GPL(macvlan_link_register); | |
1457 | ||
1458 | static struct rtnl_link_ops macvlan_link_ops = { | |
b863ceb7 | 1459 | .kind = "macvlan", |
8a35747a | 1460 | .setup = macvlan_setup, |
b863ceb7 PM |
1461 | .newlink = macvlan_newlink, |
1462 | .dellink = macvlan_dellink, | |
1463 | }; | |
1464 | ||
1465 | static int macvlan_device_event(struct notifier_block *unused, | |
1466 | unsigned long event, void *ptr) | |
1467 | { | |
351638e7 | 1468 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); |
b863ceb7 PM |
1469 | struct macvlan_dev *vlan, *next; |
1470 | struct macvlan_port *port; | |
226bd341 | 1471 | LIST_HEAD(list_kill); |
b863ceb7 | 1472 | |
a35e2c1b | 1473 | if (!macvlan_port_exists(dev)) |
b863ceb7 PM |
1474 | return NOTIFY_DONE; |
1475 | ||
e052f7e6 | 1476 | port = macvlan_port_get_rtnl(dev); |
a35e2c1b | 1477 | |
b863ceb7 PM |
1478 | switch (event) { |
1479 | case NETDEV_CHANGE: | |
1480 | list_for_each_entry(vlan, &port->vlans, list) | |
fc4a7489 PM |
1481 | netif_stacked_transfer_operstate(vlan->lowerdev, |
1482 | vlan->dev); | |
b863ceb7 PM |
1483 | break; |
1484 | case NETDEV_FEAT_CHANGE: | |
1485 | list_for_each_entry(vlan, &port->vlans, list) { | |
8c2acc53 | 1486 | vlan->dev->gso_max_size = dev->gso_max_size; |
797f87f8 | 1487 | netdev_update_features(vlan->dev); |
b863ceb7 PM |
1488 | } |
1489 | break; | |
3763e7ef | 1490 | case NETDEV_CHANGEMTU: |
1491 | list_for_each_entry(vlan, &port->vlans, list) { | |
1492 | if (vlan->dev->mtu <= dev->mtu) | |
1493 | continue; | |
1494 | dev_set_mtu(vlan->dev, dev->mtu); | |
1495 | } | |
e289fd28 | 1496 | break; |
1497 | case NETDEV_CHANGEADDR: | |
1498 | if (!port->passthru) | |
1499 | return NOTIFY_DONE; | |
1500 | ||
1501 | vlan = list_first_entry_or_null(&port->vlans, | |
1502 | struct macvlan_dev, | |
1503 | list); | |
1504 | ||
1505 | if (macvlan_sync_address(vlan->dev, dev->dev_addr)) | |
1506 | return NOTIFY_BAD; | |
1507 | ||
3763e7ef | 1508 | break; |
b863ceb7 | 1509 | case NETDEV_UNREGISTER: |
3b27e105 DL |
1510 | /* twiddle thumbs on netns device moves */ |
1511 | if (dev->reg_state != NETREG_UNREGISTERING) | |
1512 | break; | |
1513 | ||
b863ceb7 | 1514 | list_for_each_entry_safe(vlan, next, &port->vlans, list) |
226bd341 ED |
1515 | vlan->dev->rtnl_link_ops->dellink(vlan->dev, &list_kill); |
1516 | unregister_netdevice_many(&list_kill); | |
b863ceb7 | 1517 | break; |
1c01fe14 JP |
1518 | case NETDEV_PRE_TYPE_CHANGE: |
1519 | /* Forbid underlaying device to change its type. */ | |
1520 | return NOTIFY_BAD; | |
4c991255 VY |
1521 | |
1522 | case NETDEV_NOTIFY_PEERS: | |
1523 | case NETDEV_BONDING_FAILOVER: | |
1524 | case NETDEV_RESEND_IGMP: | |
1525 | /* Propagate to all vlans */ | |
1526 | list_for_each_entry(vlan, &port->vlans, list) | |
1527 | call_netdevice_notifiers(event, vlan->dev); | |
b863ceb7 PM |
1528 | } |
1529 | return NOTIFY_DONE; | |
1530 | } | |
1531 | ||
1532 | static struct notifier_block macvlan_notifier_block __read_mostly = { | |
1533 | .notifier_call = macvlan_device_event, | |
1534 | }; | |
1535 | ||
1536 | static int __init macvlan_init_module(void) | |
1537 | { | |
1538 | int err; | |
1539 | ||
1540 | register_netdevice_notifier(&macvlan_notifier_block); | |
b863ceb7 | 1541 | |
fc0663d6 | 1542 | err = macvlan_link_register(&macvlan_link_ops); |
b863ceb7 PM |
1543 | if (err < 0) |
1544 | goto err1; | |
1545 | return 0; | |
1546 | err1: | |
b863ceb7 PM |
1547 | unregister_netdevice_notifier(&macvlan_notifier_block); |
1548 | return err; | |
1549 | } | |
1550 | ||
1551 | static void __exit macvlan_cleanup_module(void) | |
1552 | { | |
1553 | rtnl_link_unregister(&macvlan_link_ops); | |
b863ceb7 PM |
1554 | unregister_netdevice_notifier(&macvlan_notifier_block); |
1555 | } | |
1556 | ||
1557 | module_init(macvlan_init_module); | |
1558 | module_exit(macvlan_cleanup_module); | |
1559 | ||
1560 | MODULE_LICENSE("GPL"); | |
1561 | MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>"); | |
1562 | MODULE_DESCRIPTION("Driver for MAC address based VLANs"); | |
1563 | MODULE_ALIAS_RTNL_LINK("macvlan"); |