Commit | Line | Data |
---|---|---|
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 PM |
37 | |
38 | #define MACVLAN_HASH_SIZE (1 << BITS_PER_BYTE) | |
07d92d5c | 39 | #define MACVLAN_BC_QUEUE_LEN 1000 |
b863ceb7 PM |
40 | |
41 | struct macvlan_port { | |
42 | struct net_device *dev; | |
43 | struct hlist_head vlan_hash[MACVLAN_HASH_SIZE]; | |
44 | struct list_head vlans; | |
8b37ef0a | 45 | struct rcu_head rcu; |
412ca155 HX |
46 | struct sk_buff_head bc_queue; |
47 | struct work_struct bc_work; | |
eb06acdc | 48 | bool passthru; |
5e3c516b | 49 | int count; |
b863ceb7 PM |
50 | }; |
51 | ||
412ca155 HX |
52 | struct macvlan_skb_cb { |
53 | const struct macvlan_dev *src; | |
54 | }; | |
55 | ||
56 | #define MACVLAN_SKB_CB(__skb) ((struct macvlan_skb_cb *)&((__skb)->cb[0])) | |
57 | ||
d5cd9244 EB |
58 | static void macvlan_port_destroy(struct net_device *dev); |
59 | ||
e052f7e6 ED |
60 | static struct macvlan_port *macvlan_port_get_rcu(const struct net_device *dev) |
61 | { | |
62 | return rcu_dereference(dev->rx_handler_data); | |
63 | } | |
64 | ||
65 | static struct macvlan_port *macvlan_port_get_rtnl(const struct net_device *dev) | |
66 | { | |
67 | return rtnl_dereference(dev->rx_handler_data); | |
68 | } | |
69 | ||
a35e2c1b JP |
70 | #define macvlan_port_exists(dev) (dev->priv_flags & IFF_MACVLAN_PORT) |
71 | ||
b863ceb7 PM |
72 | static struct macvlan_dev *macvlan_hash_lookup(const struct macvlan_port *port, |
73 | const unsigned char *addr) | |
74 | { | |
75 | struct macvlan_dev *vlan; | |
b863ceb7 | 76 | |
b67bfe0d | 77 | hlist_for_each_entry_rcu(vlan, &port->vlan_hash[addr[5]], hlist) { |
a6700db1 | 78 | if (ether_addr_equal_64bits(vlan->dev->dev_addr, addr)) |
b863ceb7 PM |
79 | return vlan; |
80 | } | |
81 | return NULL; | |
82 | } | |
83 | ||
f9ac30f0 EB |
84 | static void macvlan_hash_add(struct macvlan_dev *vlan) |
85 | { | |
86 | struct macvlan_port *port = vlan->port; | |
87 | const unsigned char *addr = vlan->dev->dev_addr; | |
88 | ||
89 | hlist_add_head_rcu(&vlan->hlist, &port->vlan_hash[addr[5]]); | |
90 | } | |
91 | ||
449f4544 | 92 | static void macvlan_hash_del(struct macvlan_dev *vlan, bool sync) |
f9ac30f0 EB |
93 | { |
94 | hlist_del_rcu(&vlan->hlist); | |
449f4544 ED |
95 | if (sync) |
96 | synchronize_rcu(); | |
f9ac30f0 EB |
97 | } |
98 | ||
99 | static void macvlan_hash_change_addr(struct macvlan_dev *vlan, | |
100 | const unsigned char *addr) | |
101 | { | |
449f4544 | 102 | macvlan_hash_del(vlan, true); |
f9ac30f0 EB |
103 | /* Now that we are unhashed it is safe to change the device |
104 | * address without confusing packet delivery. | |
105 | */ | |
106 | memcpy(vlan->dev->dev_addr, addr, ETH_ALEN); | |
107 | macvlan_hash_add(vlan); | |
108 | } | |
109 | ||
110 | static int macvlan_addr_busy(const struct macvlan_port *port, | |
111 | const unsigned char *addr) | |
112 | { | |
113 | /* Test to see if the specified multicast address is | |
114 | * currently in use by the underlying device or | |
115 | * another macvlan. | |
116 | */ | |
a6700db1 | 117 | if (ether_addr_equal_64bits(port->dev->dev_addr, addr)) |
f9ac30f0 EB |
118 | return 1; |
119 | ||
120 | if (macvlan_hash_lookup(port, addr)) | |
121 | return 1; | |
122 | ||
123 | return 0; | |
124 | } | |
125 | ||
a1e514c5 | 126 | |
fc0663d6 AB |
127 | static int macvlan_broadcast_one(struct sk_buff *skb, |
128 | const struct macvlan_dev *vlan, | |
618e1b74 | 129 | const struct ethhdr *eth, bool local) |
a1e514c5 | 130 | { |
fc0663d6 | 131 | struct net_device *dev = vlan->dev; |
a1e514c5 | 132 | |
618e1b74 | 133 | if (local) |
412ca155 | 134 | return __dev_forward_skb(dev, skb); |
618e1b74 | 135 | |
a1e514c5 | 136 | skb->dev = dev; |
a6700db1 | 137 | if (ether_addr_equal_64bits(eth->h_dest, dev->broadcast)) |
a1e514c5 AB |
138 | skb->pkt_type = PACKET_BROADCAST; |
139 | else | |
140 | skb->pkt_type = PACKET_MULTICAST; | |
141 | ||
412ca155 | 142 | return 0; |
a1e514c5 AB |
143 | } |
144 | ||
3807ff58 ED |
145 | static u32 macvlan_hash_mix(const struct macvlan_dev *vlan) |
146 | { | |
147 | return (u32)(((unsigned long)vlan) >> L1_CACHE_SHIFT); | |
148 | } | |
149 | ||
150 | ||
151 | static unsigned int mc_hash(const struct macvlan_dev *vlan, | |
152 | const unsigned char *addr) | |
cd431e73 ED |
153 | { |
154 | u32 val = __get_unaligned_cpu32(addr + 2); | |
155 | ||
3807ff58 | 156 | val ^= macvlan_hash_mix(vlan); |
cd431e73 ED |
157 | return hash_32(val, MACVLAN_MC_FILTER_BITS); |
158 | } | |
159 | ||
b863ceb7 | 160 | static void macvlan_broadcast(struct sk_buff *skb, |
618e1b74 AB |
161 | const struct macvlan_port *port, |
162 | struct net_device *src, | |
163 | enum macvlan_mode mode) | |
b863ceb7 PM |
164 | { |
165 | const struct ethhdr *eth = eth_hdr(skb); | |
166 | const struct macvlan_dev *vlan; | |
b863ceb7 PM |
167 | struct sk_buff *nskb; |
168 | unsigned int i; | |
a1e514c5 | 169 | int err; |
3807ff58 | 170 | unsigned int hash; |
b863ceb7 | 171 | |
efbbced3 PM |
172 | if (skb->protocol == htons(ETH_P_PAUSE)) |
173 | return; | |
174 | ||
b863ceb7 | 175 | for (i = 0; i < MACVLAN_HASH_SIZE; i++) { |
b67bfe0d | 176 | hlist_for_each_entry_rcu(vlan, &port->vlan_hash[i], hlist) { |
618e1b74 AB |
177 | if (vlan->dev == src || !(vlan->mode & mode)) |
178 | continue; | |
179 | ||
3807ff58 | 180 | hash = mc_hash(vlan, eth->h_dest); |
cd431e73 ED |
181 | if (!test_bit(hash, vlan->mc_filter)) |
182 | continue; | |
de9e8f3f HX |
183 | |
184 | err = NET_RX_DROP; | |
b863ceb7 | 185 | nskb = skb_clone(skb, GFP_ATOMIC); |
de9e8f3f HX |
186 | if (likely(nskb)) |
187 | err = macvlan_broadcast_one( | |
188 | nskb, vlan, eth, | |
412ca155 HX |
189 | mode == MACVLAN_MODE_BRIDGE) ?: |
190 | netif_rx_ni(nskb); | |
a1e514c5 AB |
191 | macvlan_count_rx(vlan, skb->len + ETH_HLEN, |
192 | err == NET_RX_SUCCESS, 1); | |
b863ceb7 PM |
193 | } |
194 | } | |
195 | } | |
196 | ||
412ca155 | 197 | static void macvlan_process_broadcast(struct work_struct *w) |
b863ceb7 | 198 | { |
412ca155 HX |
199 | struct macvlan_port *port = container_of(w, struct macvlan_port, |
200 | bc_work); | |
201 | struct sk_buff *skb; | |
202 | struct sk_buff_head list; | |
203 | ||
204 | skb_queue_head_init(&list); | |
205 | ||
206 | spin_lock_bh(&port->bc_queue.lock); | |
207 | skb_queue_splice_tail_init(&port->bc_queue, &list); | |
208 | spin_unlock_bh(&port->bc_queue.lock); | |
209 | ||
210 | while ((skb = __skb_dequeue(&list))) { | |
211 | const struct macvlan_dev *src = MACVLAN_SKB_CB(skb)->src; | |
212 | ||
213 | rcu_read_lock(); | |
b863ceb7 | 214 | |
618e1b74 AB |
215 | if (!src) |
216 | /* frame comes from an external address */ | |
217 | macvlan_broadcast(skb, port, NULL, | |
218 | MACVLAN_MODE_PRIVATE | | |
219 | MACVLAN_MODE_VEPA | | |
eb06acdc | 220 | MACVLAN_MODE_PASSTHRU| |
618e1b74 AB |
221 | MACVLAN_MODE_BRIDGE); |
222 | else if (src->mode == MACVLAN_MODE_VEPA) | |
223 | /* flood to everyone except source */ | |
224 | macvlan_broadcast(skb, port, src->dev, | |
225 | MACVLAN_MODE_VEPA | | |
226 | MACVLAN_MODE_BRIDGE); | |
412ca155 | 227 | else |
618e1b74 AB |
228 | /* |
229 | * flood only to VEPA ports, bridge ports | |
230 | * already saw the frame on the way out. | |
231 | */ | |
232 | macvlan_broadcast(skb, port, src->dev, | |
233 | MACVLAN_MODE_VEPA); | |
412ca155 HX |
234 | |
235 | rcu_read_unlock(); | |
236 | ||
237 | kfree_skb(skb); | |
238 | } | |
239 | } | |
240 | ||
241 | static void macvlan_broadcast_enqueue(struct macvlan_port *port, | |
242 | struct sk_buff *skb) | |
243 | { | |
e676f197 | 244 | struct sk_buff *nskb; |
412ca155 HX |
245 | int err = -ENOMEM; |
246 | ||
e676f197 HX |
247 | nskb = skb_clone(skb, GFP_ATOMIC); |
248 | if (!nskb) | |
412ca155 HX |
249 | goto err; |
250 | ||
251 | spin_lock(&port->bc_queue.lock); | |
07d92d5c | 252 | if (skb_queue_len(&port->bc_queue) < MACVLAN_BC_QUEUE_LEN) { |
e676f197 | 253 | __skb_queue_tail(&port->bc_queue, nskb); |
412ca155 HX |
254 | err = 0; |
255 | } | |
256 | spin_unlock(&port->bc_queue.lock); | |
257 | ||
258 | if (err) | |
e676f197 | 259 | goto free_nskb; |
412ca155 HX |
260 | |
261 | schedule_work(&port->bc_work); | |
262 | return; | |
263 | ||
e676f197 HX |
264 | free_nskb: |
265 | kfree_skb(nskb); | |
412ca155 HX |
266 | err: |
267 | atomic_long_inc(&skb->dev->rx_dropped); | |
268 | } | |
269 | ||
270 | /* called under rcu_read_lock() from netif_receive_skb */ | |
271 | static rx_handler_result_t macvlan_handle_frame(struct sk_buff **pskb) | |
272 | { | |
273 | struct macvlan_port *port; | |
274 | struct sk_buff *skb = *pskb; | |
275 | const struct ethhdr *eth = eth_hdr(skb); | |
276 | const struct macvlan_dev *vlan; | |
277 | const struct macvlan_dev *src; | |
278 | struct net_device *dev; | |
279 | unsigned int len = 0; | |
280 | int ret = NET_RX_DROP; | |
281 | ||
282 | port = macvlan_port_get_rcu(skb->dev); | |
283 | if (is_multicast_ether_addr(eth->h_dest)) { | |
284 | skb = ip_check_defrag(skb, IP_DEFRAG_MACVLAN); | |
285 | if (!skb) | |
286 | return RX_HANDLER_CONSUMED; | |
287 | eth = eth_hdr(skb); | |
288 | src = macvlan_hash_lookup(port, eth->h_source); | |
289 | if (src && src->mode != MACVLAN_MODE_VEPA && | |
290 | src->mode != MACVLAN_MODE_BRIDGE) { | |
729e72a1 | 291 | /* forward to original port. */ |
292 | vlan = src; | |
412ca155 HX |
293 | ret = macvlan_broadcast_one(skb, vlan, eth, 0) ?: |
294 | netif_rx(skb); | |
729e72a1 | 295 | goto out; |
296 | } | |
297 | ||
412ca155 HX |
298 | MACVLAN_SKB_CB(skb)->src = src; |
299 | macvlan_broadcast_enqueue(port, skb); | |
300 | ||
8a4eb573 | 301 | return RX_HANDLER_PASS; |
b863ceb7 PM |
302 | } |
303 | ||
eb06acdc | 304 | if (port->passthru) |
233c7df0 JP |
305 | vlan = list_first_or_null_rcu(&port->vlans, |
306 | struct macvlan_dev, list); | |
eb06acdc SS |
307 | else |
308 | vlan = macvlan_hash_lookup(port, eth->h_dest); | |
b863ceb7 | 309 | if (vlan == NULL) |
8a4eb573 | 310 | return RX_HANDLER_PASS; |
b863ceb7 PM |
311 | |
312 | dev = vlan->dev; | |
313 | if (unlikely(!(dev->flags & IFF_UP))) { | |
314 | kfree_skb(skb); | |
8a4eb573 | 315 | return RX_HANDLER_CONSUMED; |
b863ceb7 | 316 | } |
a1e514c5 | 317 | len = skb->len + ETH_HLEN; |
b863ceb7 | 318 | skb = skb_share_check(skb, GFP_ATOMIC); |
a1e514c5 | 319 | if (!skb) |
ba01877f | 320 | goto out; |
b863ceb7 PM |
321 | |
322 | skb->dev = dev; | |
323 | skb->pkt_type = PACKET_HOST; | |
324 | ||
2f6a1b66 | 325 | ret = netif_rx(skb); |
ba01877f SS |
326 | |
327 | out: | |
328 | macvlan_count_rx(vlan, len, ret == NET_RX_SUCCESS, 0); | |
8a4eb573 | 329 | return RX_HANDLER_CONSUMED; |
b863ceb7 PM |
330 | } |
331 | ||
618e1b74 AB |
332 | static int macvlan_queue_xmit(struct sk_buff *skb, struct net_device *dev) |
333 | { | |
334 | const struct macvlan_dev *vlan = netdev_priv(dev); | |
335 | const struct macvlan_port *port = vlan->port; | |
336 | const struct macvlan_dev *dest; | |
337 | ||
338 | if (vlan->mode == MACVLAN_MODE_BRIDGE) { | |
339 | const struct ethhdr *eth = (void *)skb->data; | |
340 | ||
341 | /* send to other bridge ports directly */ | |
342 | if (is_multicast_ether_addr(eth->h_dest)) { | |
343 | macvlan_broadcast(skb, port, dev, MACVLAN_MODE_BRIDGE); | |
344 | goto xmit_world; | |
345 | } | |
346 | ||
347 | dest = macvlan_hash_lookup(port, eth->h_dest); | |
348 | if (dest && dest->mode == MACVLAN_MODE_BRIDGE) { | |
a37dd333 | 349 | /* send to lowerdev first for its network taps */ |
cb2d0f3e | 350 | dev_forward_skb(vlan->lowerdev, skb); |
618e1b74 AB |
351 | |
352 | return NET_XMIT_SUCCESS; | |
353 | } | |
354 | } | |
355 | ||
356 | xmit_world: | |
59b9997b | 357 | skb->dev = vlan->lowerdev; |
618e1b74 AB |
358 | return dev_queue_xmit(skb); |
359 | } | |
360 | ||
688cea83 | 361 | static inline netdev_tx_t macvlan_netpoll_send_skb(struct macvlan_dev *vlan, struct sk_buff *skb) |
362 | { | |
363 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
364 | if (vlan->netpoll) | |
365 | netpoll_send_skb(vlan->netpoll, skb); | |
366 | #else | |
367 | BUG(); | |
368 | #endif | |
369 | return NETDEV_TX_OK; | |
370 | } | |
371 | ||
0db901bd | 372 | static netdev_tx_t macvlan_start_xmit(struct sk_buff *skb, |
373 | struct net_device *dev) | |
b863ceb7 | 374 | { |
b863ceb7 PM |
375 | unsigned int len = skb->len; |
376 | int ret; | |
688cea83 | 377 | struct macvlan_dev *vlan = netdev_priv(dev); |
378 | ||
379 | if (unlikely(netpoll_tx_running(dev))) | |
380 | return macvlan_netpoll_send_skb(vlan, skb); | |
b863ceb7 | 381 | |
a6cc0cfa JF |
382 | if (vlan->fwd_priv) { |
383 | skb->dev = vlan->lowerdev; | |
f663dd9a | 384 | ret = dev_queue_xmit_accel(skb, vlan->fwd_priv); |
a6cc0cfa JF |
385 | } else { |
386 | ret = macvlan_queue_xmit(skb, dev); | |
387 | } | |
388 | ||
2d6c9ffc | 389 | if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) { |
cdf3e274 | 390 | struct vlan_pcpu_stats *pcpu_stats; |
2c114553 | 391 | |
8ffab51b ED |
392 | pcpu_stats = this_cpu_ptr(vlan->pcpu_stats); |
393 | u64_stats_update_begin(&pcpu_stats->syncp); | |
394 | pcpu_stats->tx_packets++; | |
395 | pcpu_stats->tx_bytes += len; | |
396 | u64_stats_update_end(&pcpu_stats->syncp); | |
397 | } else { | |
398 | this_cpu_inc(vlan->pcpu_stats->tx_dropped); | |
399 | } | |
cbbef5e1 | 400 | return ret; |
b863ceb7 PM |
401 | } |
402 | ||
403 | static int macvlan_hard_header(struct sk_buff *skb, struct net_device *dev, | |
3b04ddde SH |
404 | unsigned short type, const void *daddr, |
405 | const void *saddr, unsigned len) | |
b863ceb7 PM |
406 | { |
407 | const struct macvlan_dev *vlan = netdev_priv(dev); | |
408 | struct net_device *lowerdev = vlan->lowerdev; | |
409 | ||
0c4e8581 SH |
410 | return dev_hard_header(skb, lowerdev, type, daddr, |
411 | saddr ? : dev->dev_addr, len); | |
b863ceb7 PM |
412 | } |
413 | ||
3b04ddde SH |
414 | static const struct header_ops macvlan_hard_header_ops = { |
415 | .create = macvlan_hard_header, | |
416 | .rebuild = eth_rebuild_header, | |
417 | .parse = eth_header_parse, | |
3b04ddde SH |
418 | .cache = eth_header_cache, |
419 | .cache_update = eth_header_cache_update, | |
420 | }; | |
421 | ||
b13ba1b8 JW |
422 | static struct rtnl_link_ops macvlan_link_ops; |
423 | ||
b863ceb7 PM |
424 | static int macvlan_open(struct net_device *dev) |
425 | { | |
426 | struct macvlan_dev *vlan = netdev_priv(dev); | |
b863ceb7 PM |
427 | struct net_device *lowerdev = vlan->lowerdev; |
428 | int err; | |
429 | ||
eb06acdc | 430 | if (vlan->port->passthru) { |
78738141 MT |
431 | if (!(vlan->flags & MACVLAN_FLAG_NOPROMISC)) { |
432 | err = dev_set_promiscuity(lowerdev, 1); | |
433 | if (err < 0) | |
434 | goto out; | |
435 | } | |
eb06acdc SS |
436 | goto hash_add; |
437 | } | |
438 | ||
b13ba1b8 JW |
439 | if (lowerdev->features & NETIF_F_HW_L2FW_DOFFLOAD && |
440 | dev->rtnl_link_ops == &macvlan_link_ops) { | |
a6cc0cfa JF |
441 | vlan->fwd_priv = |
442 | lowerdev->netdev_ops->ndo_dfwd_add_station(lowerdev, dev); | |
443 | ||
444 | /* If we get a NULL pointer back, or if we get an error | |
445 | * then we should just fall through to the non accelerated path | |
446 | */ | |
447 | if (IS_ERR_OR_NULL(vlan->fwd_priv)) { | |
448 | vlan->fwd_priv = NULL; | |
f663dd9a | 449 | } else |
a6cc0cfa | 450 | return 0; |
a6cc0cfa JF |
451 | } |
452 | ||
f9ac30f0 EB |
453 | err = -EBUSY; |
454 | if (macvlan_addr_busy(vlan->port, dev->dev_addr)) | |
455 | goto out; | |
456 | ||
a748ee24 | 457 | err = dev_uc_add(lowerdev, dev->dev_addr); |
b863ceb7 | 458 | if (err < 0) |
b89fb7da WC |
459 | goto out; |
460 | if (dev->flags & IFF_ALLMULTI) { | |
461 | err = dev_set_allmulti(lowerdev, 1); | |
462 | if (err < 0) | |
463 | goto del_unicast; | |
464 | } | |
eb06acdc SS |
465 | |
466 | hash_add: | |
f9ac30f0 | 467 | macvlan_hash_add(vlan); |
b863ceb7 | 468 | return 0; |
b89fb7da WC |
469 | |
470 | del_unicast: | |
a748ee24 | 471 | dev_uc_del(lowerdev, dev->dev_addr); |
b89fb7da | 472 | out: |
a6cc0cfa JF |
473 | if (vlan->fwd_priv) { |
474 | lowerdev->netdev_ops->ndo_dfwd_del_station(lowerdev, | |
475 | vlan->fwd_priv); | |
476 | vlan->fwd_priv = NULL; | |
477 | } | |
b89fb7da | 478 | return err; |
b863ceb7 PM |
479 | } |
480 | ||
481 | static int macvlan_stop(struct net_device *dev) | |
482 | { | |
483 | struct macvlan_dev *vlan = netdev_priv(dev); | |
484 | struct net_device *lowerdev = vlan->lowerdev; | |
485 | ||
a6cc0cfa JF |
486 | if (vlan->fwd_priv) { |
487 | lowerdev->netdev_ops->ndo_dfwd_del_station(lowerdev, | |
488 | vlan->fwd_priv); | |
489 | vlan->fwd_priv = NULL; | |
490 | return 0; | |
491 | } | |
492 | ||
df8ef8f3 JF |
493 | dev_uc_unsync(lowerdev, dev); |
494 | dev_mc_unsync(lowerdev, dev); | |
495 | ||
eb06acdc | 496 | if (vlan->port->passthru) { |
df8ef8f3 JF |
497 | if (!(vlan->flags & MACVLAN_FLAG_NOPROMISC)) |
498 | dev_set_promiscuity(lowerdev, -1); | |
eb06acdc SS |
499 | goto hash_del; |
500 | } | |
501 | ||
b863ceb7 PM |
502 | if (dev->flags & IFF_ALLMULTI) |
503 | dev_set_allmulti(lowerdev, -1); | |
504 | ||
a748ee24 | 505 | dev_uc_del(lowerdev, dev->dev_addr); |
b863ceb7 | 506 | |
eb06acdc | 507 | hash_del: |
449f4544 | 508 | macvlan_hash_del(vlan, !dev->dismantle); |
b863ceb7 PM |
509 | return 0; |
510 | } | |
511 | ||
e289fd28 | 512 | static int macvlan_sync_address(struct net_device *dev, unsigned char *addr) |
ad5d20a6 PM |
513 | { |
514 | struct macvlan_dev *vlan = netdev_priv(dev); | |
515 | struct net_device *lowerdev = vlan->lowerdev; | |
ad5d20a6 PM |
516 | int err; |
517 | ||
f9ac30f0 EB |
518 | if (!(dev->flags & IFF_UP)) { |
519 | /* Just copy in the new address */ | |
e289fd28 | 520 | ether_addr_copy(dev->dev_addr, addr); |
f9ac30f0 EB |
521 | } else { |
522 | /* Rehash and update the device filters */ | |
e289fd28 | 523 | if (macvlan_addr_busy(vlan->port, addr)) |
f9ac30f0 | 524 | return -EBUSY; |
ad5d20a6 | 525 | |
e289fd28 | 526 | if (!vlan->port->passthru) { |
527 | err = dev_uc_add(lowerdev, addr); | |
528 | if (err) | |
529 | return err; | |
ad5d20a6 | 530 | |
e289fd28 | 531 | dev_uc_del(lowerdev, dev->dev_addr); |
532 | } | |
f9ac30f0 | 533 | |
e289fd28 | 534 | macvlan_hash_change_addr(vlan, addr); |
f9ac30f0 | 535 | } |
ad5d20a6 PM |
536 | return 0; |
537 | } | |
538 | ||
e289fd28 | 539 | static int macvlan_set_mac_address(struct net_device *dev, void *p) |
540 | { | |
541 | struct macvlan_dev *vlan = netdev_priv(dev); | |
542 | struct sockaddr *addr = p; | |
543 | ||
544 | if (!is_valid_ether_addr(addr->sa_data)) | |
545 | return -EADDRNOTAVAIL; | |
546 | ||
547 | if (vlan->mode == MACVLAN_MODE_PASSTHRU) { | |
548 | dev_set_mac_address(vlan->lowerdev, addr); | |
549 | return 0; | |
550 | } | |
551 | ||
552 | return macvlan_sync_address(dev, addr->sa_data); | |
553 | } | |
554 | ||
b863ceb7 PM |
555 | static void macvlan_change_rx_flags(struct net_device *dev, int change) |
556 | { | |
557 | struct macvlan_dev *vlan = netdev_priv(dev); | |
558 | struct net_device *lowerdev = vlan->lowerdev; | |
559 | ||
bbeb0ead PC |
560 | if (dev->flags & IFF_UP) { |
561 | if (change & IFF_ALLMULTI) | |
562 | dev_set_allmulti(lowerdev, dev->flags & IFF_ALLMULTI ? 1 : -1); | |
563 | } | |
b863ceb7 PM |
564 | } |
565 | ||
df8ef8f3 | 566 | static void macvlan_set_mac_lists(struct net_device *dev) |
b863ceb7 PM |
567 | { |
568 | struct macvlan_dev *vlan = netdev_priv(dev); | |
569 | ||
cd431e73 ED |
570 | if (dev->flags & (IFF_PROMISC | IFF_ALLMULTI)) { |
571 | bitmap_fill(vlan->mc_filter, MACVLAN_MC_FILTER_SZ); | |
572 | } else { | |
573 | struct netdev_hw_addr *ha; | |
574 | DECLARE_BITMAP(filter, MACVLAN_MC_FILTER_SZ); | |
575 | ||
576 | bitmap_zero(filter, MACVLAN_MC_FILTER_SZ); | |
577 | netdev_for_each_mc_addr(ha, dev) { | |
3807ff58 | 578 | __set_bit(mc_hash(vlan, ha->addr), filter); |
cd431e73 | 579 | } |
d5270430 | 580 | |
3807ff58 | 581 | __set_bit(mc_hash(vlan, dev->broadcast), filter); |
d5270430 | 582 | |
cd431e73 ED |
583 | bitmap_copy(vlan->mc_filter, filter, MACVLAN_MC_FILTER_SZ); |
584 | } | |
df8ef8f3 | 585 | dev_uc_sync(vlan->lowerdev, dev); |
b863ceb7 PM |
586 | dev_mc_sync(vlan->lowerdev, dev); |
587 | } | |
588 | ||
589 | static int macvlan_change_mtu(struct net_device *dev, int new_mtu) | |
590 | { | |
591 | struct macvlan_dev *vlan = netdev_priv(dev); | |
592 | ||
593 | if (new_mtu < 68 || vlan->lowerdev->mtu < new_mtu) | |
594 | return -EINVAL; | |
595 | dev->mtu = new_mtu; | |
596 | return 0; | |
597 | } | |
598 | ||
599 | /* | |
600 | * macvlan network devices have devices nesting below it and are a special | |
601 | * "super class" of normal network devices; split their locks off into a | |
602 | * separate class since they always nest. | |
603 | */ | |
604 | static struct lock_class_key macvlan_netdev_xmit_lock_key; | |
cf508b12 | 605 | static struct lock_class_key macvlan_netdev_addr_lock_key; |
b863ceb7 | 606 | |
8b4703e9 VY |
607 | #define ALWAYS_ON_FEATURES \ |
608 | (NETIF_F_SG | NETIF_F_GEN_CSUM | NETIF_F_GSO_SOFTWARE | NETIF_F_LLTX) | |
609 | ||
b863ceb7 PM |
610 | #define MACVLAN_FEATURES \ |
611 | (NETIF_F_SG | NETIF_F_ALL_CSUM | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST | \ | |
612 | NETIF_F_GSO | NETIF_F_TSO | NETIF_F_UFO | NETIF_F_GSO_ROBUST | \ | |
8d13e670 | 613 | NETIF_F_TSO_ECN | NETIF_F_TSO6 | NETIF_F_GRO | NETIF_F_RXCSUM | \ |
28d2b136 | 614 | NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_HW_VLAN_STAG_FILTER) |
b863ceb7 PM |
615 | |
616 | #define MACVLAN_STATE_MASK \ | |
617 | ((1<<__LINK_STATE_NOCARRIER) | (1<<__LINK_STATE_DORMANT)) | |
618 | ||
c674ac30 VY |
619 | static int macvlan_get_nest_level(struct net_device *dev) |
620 | { | |
621 | return ((struct macvlan_dev *)netdev_priv(dev))->nest_level; | |
622 | } | |
623 | ||
e8a0464c DM |
624 | static void macvlan_set_lockdep_class_one(struct net_device *dev, |
625 | struct netdev_queue *txq, | |
626 | void *_unused) | |
c773e847 DM |
627 | { |
628 | lockdep_set_class(&txq->_xmit_lock, | |
629 | &macvlan_netdev_xmit_lock_key); | |
630 | } | |
631 | ||
632 | static void macvlan_set_lockdep_class(struct net_device *dev) | |
633 | { | |
c674ac30 VY |
634 | lockdep_set_class_and_subclass(&dev->addr_list_lock, |
635 | &macvlan_netdev_addr_lock_key, | |
636 | macvlan_get_nest_level(dev)); | |
e8a0464c | 637 | netdev_for_each_tx_queue(dev, macvlan_set_lockdep_class_one, NULL); |
c773e847 DM |
638 | } |
639 | ||
b863ceb7 PM |
640 | static int macvlan_init(struct net_device *dev) |
641 | { | |
642 | struct macvlan_dev *vlan = netdev_priv(dev); | |
643 | const struct net_device *lowerdev = vlan->lowerdev; | |
644 | ||
645 | dev->state = (dev->state & ~MACVLAN_STATE_MASK) | | |
646 | (lowerdev->state & MACVLAN_STATE_MASK); | |
647 | dev->features = lowerdev->features & MACVLAN_FEATURES; | |
8b4703e9 | 648 | dev->features |= ALWAYS_ON_FEATURES; |
081e83a7 | 649 | dev->vlan_features = lowerdev->vlan_features & MACVLAN_FEATURES; |
8c2acc53 | 650 | dev->gso_max_size = lowerdev->gso_max_size; |
b863ceb7 | 651 | dev->iflink = lowerdev->ifindex; |
ef5c8996 | 652 | dev->hard_header_len = lowerdev->hard_header_len; |
b863ceb7 | 653 | |
c773e847 DM |
654 | macvlan_set_lockdep_class(dev); |
655 | ||
1c213bd2 | 656 | vlan->pcpu_stats = netdev_alloc_pcpu_stats(struct vlan_pcpu_stats); |
8ffab51b | 657 | if (!vlan->pcpu_stats) |
fccaf710 ED |
658 | return -ENOMEM; |
659 | ||
b863ceb7 PM |
660 | return 0; |
661 | } | |
662 | ||
fccaf710 ED |
663 | static void macvlan_uninit(struct net_device *dev) |
664 | { | |
665 | struct macvlan_dev *vlan = netdev_priv(dev); | |
d5cd9244 | 666 | struct macvlan_port *port = vlan->port; |
fccaf710 | 667 | |
8ffab51b | 668 | free_percpu(vlan->pcpu_stats); |
d5cd9244 | 669 | |
5e3c516b DM |
670 | port->count -= 1; |
671 | if (!port->count) | |
d5cd9244 | 672 | macvlan_port_destroy(port->dev); |
fccaf710 ED |
673 | } |
674 | ||
28172739 ED |
675 | static struct rtnl_link_stats64 *macvlan_dev_get_stats64(struct net_device *dev, |
676 | struct rtnl_link_stats64 *stats) | |
fccaf710 | 677 | { |
fccaf710 ED |
678 | struct macvlan_dev *vlan = netdev_priv(dev); |
679 | ||
8ffab51b | 680 | if (vlan->pcpu_stats) { |
cdf3e274 | 681 | struct vlan_pcpu_stats *p; |
8ffab51b ED |
682 | u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes; |
683 | u32 rx_errors = 0, tx_dropped = 0; | |
bc66154e | 684 | unsigned int start; |
fccaf710 ED |
685 | int i; |
686 | ||
687 | for_each_possible_cpu(i) { | |
8ffab51b | 688 | p = per_cpu_ptr(vlan->pcpu_stats, i); |
bc66154e | 689 | do { |
57a7744e | 690 | start = u64_stats_fetch_begin_irq(&p->syncp); |
bc66154e ED |
691 | rx_packets = p->rx_packets; |
692 | rx_bytes = p->rx_bytes; | |
693 | rx_multicast = p->rx_multicast; | |
8ffab51b ED |
694 | tx_packets = p->tx_packets; |
695 | tx_bytes = p->tx_bytes; | |
57a7744e | 696 | } while (u64_stats_fetch_retry_irq(&p->syncp, start)); |
8ffab51b ED |
697 | |
698 | stats->rx_packets += rx_packets; | |
699 | stats->rx_bytes += rx_bytes; | |
700 | stats->multicast += rx_multicast; | |
701 | stats->tx_packets += tx_packets; | |
702 | stats->tx_bytes += tx_bytes; | |
703 | /* rx_errors & tx_dropped are u32, updated | |
704 | * without syncp protection. | |
705 | */ | |
706 | rx_errors += p->rx_errors; | |
707 | tx_dropped += p->tx_dropped; | |
fccaf710 | 708 | } |
8ffab51b ED |
709 | stats->rx_errors = rx_errors; |
710 | stats->rx_dropped = rx_errors; | |
711 | stats->tx_dropped = tx_dropped; | |
fccaf710 ED |
712 | } |
713 | return stats; | |
714 | } | |
715 | ||
8e586137 | 716 | static int macvlan_vlan_rx_add_vid(struct net_device *dev, |
80d5c368 | 717 | __be16 proto, u16 vid) |
8d13e670 JF |
718 | { |
719 | struct macvlan_dev *vlan = netdev_priv(dev); | |
720 | struct net_device *lowerdev = vlan->lowerdev; | |
8d13e670 | 721 | |
80d5c368 | 722 | return vlan_vid_add(lowerdev, proto, vid); |
8d13e670 JF |
723 | } |
724 | ||
8e586137 | 725 | static int macvlan_vlan_rx_kill_vid(struct net_device *dev, |
80d5c368 | 726 | __be16 proto, u16 vid) |
8d13e670 JF |
727 | { |
728 | struct macvlan_dev *vlan = netdev_priv(dev); | |
729 | struct net_device *lowerdev = vlan->lowerdev; | |
8d13e670 | 730 | |
80d5c368 | 731 | vlan_vid_del(lowerdev, proto, vid); |
8e586137 | 732 | return 0; |
8d13e670 JF |
733 | } |
734 | ||
edc7d573 | 735 | static int macvlan_fdb_add(struct ndmsg *ndm, struct nlattr *tb[], |
df8ef8f3 | 736 | struct net_device *dev, |
6b6e2725 | 737 | const unsigned char *addr, |
df8ef8f3 JF |
738 | u16 flags) |
739 | { | |
740 | struct macvlan_dev *vlan = netdev_priv(dev); | |
741 | int err = -EINVAL; | |
742 | ||
8a50f11c VY |
743 | /* Support unicast filter only on passthru devices. |
744 | * Multicast filter should be allowed on all devices. | |
745 | */ | |
746 | if (!vlan->port->passthru && is_unicast_ether_addr(addr)) | |
df8ef8f3 JF |
747 | return -EOPNOTSUPP; |
748 | ||
ab2cfbb2 TR |
749 | if (flags & NLM_F_REPLACE) |
750 | return -EOPNOTSUPP; | |
751 | ||
df8ef8f3 JF |
752 | if (is_unicast_ether_addr(addr)) |
753 | err = dev_uc_add_excl(dev, addr); | |
754 | else if (is_multicast_ether_addr(addr)) | |
755 | err = dev_mc_add_excl(dev, addr); | |
756 | ||
757 | return err; | |
758 | } | |
759 | ||
1690be63 | 760 | static int macvlan_fdb_del(struct ndmsg *ndm, struct nlattr *tb[], |
df8ef8f3 | 761 | struct net_device *dev, |
6b6e2725 | 762 | const unsigned char *addr) |
df8ef8f3 JF |
763 | { |
764 | struct macvlan_dev *vlan = netdev_priv(dev); | |
765 | int err = -EINVAL; | |
766 | ||
8a50f11c VY |
767 | /* Support unicast filter only on passthru devices. |
768 | * Multicast filter should be allowed on all devices. | |
769 | */ | |
770 | if (!vlan->port->passthru && is_unicast_ether_addr(addr)) | |
df8ef8f3 JF |
771 | return -EOPNOTSUPP; |
772 | ||
773 | if (is_unicast_ether_addr(addr)) | |
774 | err = dev_uc_del(dev, addr); | |
775 | else if (is_multicast_ether_addr(addr)) | |
776 | err = dev_mc_del(dev, addr); | |
777 | ||
778 | return err; | |
779 | } | |
780 | ||
b863ceb7 PM |
781 | static void macvlan_ethtool_get_drvinfo(struct net_device *dev, |
782 | struct ethtool_drvinfo *drvinfo) | |
783 | { | |
7826d43f JP |
784 | strlcpy(drvinfo->driver, "macvlan", sizeof(drvinfo->driver)); |
785 | strlcpy(drvinfo->version, "0.1", sizeof(drvinfo->version)); | |
b863ceb7 PM |
786 | } |
787 | ||
9edb8bb6 SH |
788 | static int macvlan_ethtool_get_settings(struct net_device *dev, |
789 | struct ethtool_cmd *cmd) | |
790 | { | |
791 | const struct macvlan_dev *vlan = netdev_priv(dev); | |
4bc71cb9 JP |
792 | |
793 | return __ethtool_get_settings(vlan->lowerdev, cmd); | |
9edb8bb6 SH |
794 | } |
795 | ||
2be5c767 VY |
796 | static netdev_features_t macvlan_fix_features(struct net_device *dev, |
797 | netdev_features_t features) | |
798 | { | |
799 | struct macvlan_dev *vlan = netdev_priv(dev); | |
797f87f8 | 800 | netdev_features_t mask; |
2be5c767 | 801 | |
797f87f8 FW |
802 | features |= NETIF_F_ALL_FOR_ALL; |
803 | features &= (vlan->set_features | ~MACVLAN_FEATURES); | |
804 | mask = features; | |
805 | ||
806 | features = netdev_increment_features(vlan->lowerdev->features, | |
807 | features, | |
808 | mask); | |
8b4703e9 | 809 | features |= ALWAYS_ON_FEATURES; |
0d0162e7 | 810 | features &= ~NETIF_F_NETNS_LOCAL; |
797f87f8 FW |
811 | |
812 | return features; | |
2be5c767 VY |
813 | } |
814 | ||
688cea83 | 815 | #ifdef CONFIG_NET_POLL_CONTROLLER |
816 | static void macvlan_dev_poll_controller(struct net_device *dev) | |
817 | { | |
818 | return; | |
819 | } | |
820 | ||
821 | static int macvlan_dev_netpoll_setup(struct net_device *dev, struct netpoll_info *npinfo) | |
822 | { | |
823 | struct macvlan_dev *vlan = netdev_priv(dev); | |
824 | struct net_device *real_dev = vlan->lowerdev; | |
825 | struct netpoll *netpoll; | |
826 | int err = 0; | |
827 | ||
828 | netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL); | |
829 | err = -ENOMEM; | |
830 | if (!netpoll) | |
831 | goto out; | |
832 | ||
833 | err = __netpoll_setup(netpoll, real_dev); | |
834 | if (err) { | |
835 | kfree(netpoll); | |
836 | goto out; | |
837 | } | |
838 | ||
839 | vlan->netpoll = netpoll; | |
840 | ||
841 | out: | |
842 | return err; | |
843 | } | |
844 | ||
845 | static void macvlan_dev_netpoll_cleanup(struct net_device *dev) | |
846 | { | |
847 | struct macvlan_dev *vlan = netdev_priv(dev); | |
848 | struct netpoll *netpoll = vlan->netpoll; | |
849 | ||
850 | if (!netpoll) | |
851 | return; | |
852 | ||
853 | vlan->netpoll = NULL; | |
854 | ||
855 | __netpoll_free_async(netpoll); | |
856 | } | |
857 | #endif /* CONFIG_NET_POLL_CONTROLLER */ | |
858 | ||
b863ceb7 PM |
859 | static const struct ethtool_ops macvlan_ethtool_ops = { |
860 | .get_link = ethtool_op_get_link, | |
9edb8bb6 | 861 | .get_settings = macvlan_ethtool_get_settings, |
b863ceb7 PM |
862 | .get_drvinfo = macvlan_ethtool_get_drvinfo, |
863 | }; | |
864 | ||
54a30c97 SH |
865 | static const struct net_device_ops macvlan_netdev_ops = { |
866 | .ndo_init = macvlan_init, | |
fccaf710 | 867 | .ndo_uninit = macvlan_uninit, |
54a30c97 SH |
868 | .ndo_open = macvlan_open, |
869 | .ndo_stop = macvlan_stop, | |
00829823 | 870 | .ndo_start_xmit = macvlan_start_xmit, |
54a30c97 | 871 | .ndo_change_mtu = macvlan_change_mtu, |
2be5c767 | 872 | .ndo_fix_features = macvlan_fix_features, |
54a30c97 SH |
873 | .ndo_change_rx_flags = macvlan_change_rx_flags, |
874 | .ndo_set_mac_address = macvlan_set_mac_address, | |
df8ef8f3 | 875 | .ndo_set_rx_mode = macvlan_set_mac_lists, |
bc66154e | 876 | .ndo_get_stats64 = macvlan_dev_get_stats64, |
54a30c97 | 877 | .ndo_validate_addr = eth_validate_addr, |
8d13e670 JF |
878 | .ndo_vlan_rx_add_vid = macvlan_vlan_rx_add_vid, |
879 | .ndo_vlan_rx_kill_vid = macvlan_vlan_rx_kill_vid, | |
df8ef8f3 JF |
880 | .ndo_fdb_add = macvlan_fdb_add, |
881 | .ndo_fdb_del = macvlan_fdb_del, | |
882 | .ndo_fdb_dump = ndo_dflt_fdb_dump, | |
c674ac30 | 883 | .ndo_get_lock_subclass = macvlan_get_nest_level, |
688cea83 | 884 | #ifdef CONFIG_NET_POLL_CONTROLLER |
885 | .ndo_poll_controller = macvlan_dev_poll_controller, | |
886 | .ndo_netpoll_setup = macvlan_dev_netpoll_setup, | |
887 | .ndo_netpoll_cleanup = macvlan_dev_netpoll_cleanup, | |
888 | #endif | |
54a30c97 SH |
889 | }; |
890 | ||
8a35747a | 891 | void macvlan_common_setup(struct net_device *dev) |
b863ceb7 PM |
892 | { |
893 | ether_setup(dev); | |
894 | ||
550fd08c | 895 | dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING); |
87ab7f6f | 896 | dev->priv_flags |= IFF_UNICAST_FLT; |
54a30c97 | 897 | dev->netdev_ops = &macvlan_netdev_ops; |
b863ceb7 | 898 | dev->destructor = free_netdev; |
71740129 | 899 | dev->header_ops = &macvlan_hard_header_ops; |
b863ceb7 | 900 | dev->ethtool_ops = &macvlan_ethtool_ops; |
8a35747a HX |
901 | } |
902 | EXPORT_SYMBOL_GPL(macvlan_common_setup); | |
903 | ||
904 | static void macvlan_setup(struct net_device *dev) | |
905 | { | |
906 | macvlan_common_setup(dev); | |
b863ceb7 PM |
907 | dev->tx_queue_len = 0; |
908 | } | |
909 | ||
910 | static int macvlan_port_create(struct net_device *dev) | |
911 | { | |
912 | struct macvlan_port *port; | |
913 | unsigned int i; | |
ab95bfe0 | 914 | int err; |
b863ceb7 PM |
915 | |
916 | if (dev->type != ARPHRD_ETHER || dev->flags & IFF_LOOPBACK) | |
917 | return -EINVAL; | |
918 | ||
919 | port = kzalloc(sizeof(*port), GFP_KERNEL); | |
920 | if (port == NULL) | |
921 | return -ENOMEM; | |
922 | ||
eb06acdc | 923 | port->passthru = false; |
b863ceb7 PM |
924 | port->dev = dev; |
925 | INIT_LIST_HEAD(&port->vlans); | |
926 | for (i = 0; i < MACVLAN_HASH_SIZE; i++) | |
927 | INIT_HLIST_HEAD(&port->vlan_hash[i]); | |
ab95bfe0 | 928 | |
412ca155 HX |
929 | skb_queue_head_init(&port->bc_queue); |
930 | INIT_WORK(&port->bc_work, macvlan_process_broadcast); | |
931 | ||
a35e2c1b JP |
932 | err = netdev_rx_handler_register(dev, macvlan_handle_frame, port); |
933 | if (err) | |
ab95bfe0 | 934 | kfree(port); |
d9351561 ED |
935 | else |
936 | dev->priv_flags |= IFF_MACVLAN_PORT; | |
ab95bfe0 | 937 | return err; |
b863ceb7 PM |
938 | } |
939 | ||
940 | static void macvlan_port_destroy(struct net_device *dev) | |
941 | { | |
e052f7e6 | 942 | struct macvlan_port *port = macvlan_port_get_rtnl(dev); |
b863ceb7 | 943 | |
412ca155 | 944 | cancel_work_sync(&port->bc_work); |
a35e2c1b | 945 | dev->priv_flags &= ~IFF_MACVLAN_PORT; |
ab95bfe0 | 946 | netdev_rx_handler_unregister(dev); |
6e070aec | 947 | kfree_rcu(port, rcu); |
b863ceb7 PM |
948 | } |
949 | ||
b863ceb7 PM |
950 | static int macvlan_validate(struct nlattr *tb[], struct nlattr *data[]) |
951 | { | |
952 | if (tb[IFLA_ADDRESS]) { | |
953 | if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) | |
954 | return -EINVAL; | |
955 | if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) | |
956 | return -EADDRNOTAVAIL; | |
957 | } | |
27c0b1a8 | 958 | |
15127478 MT |
959 | if (data && data[IFLA_MACVLAN_FLAGS] && |
960 | nla_get_u16(data[IFLA_MACVLAN_FLAGS]) & ~MACVLAN_FLAG_NOPROMISC) | |
961 | return -EINVAL; | |
962 | ||
27c0b1a8 AB |
963 | if (data && data[IFLA_MACVLAN_MODE]) { |
964 | switch (nla_get_u32(data[IFLA_MACVLAN_MODE])) { | |
965 | case MACVLAN_MODE_PRIVATE: | |
966 | case MACVLAN_MODE_VEPA: | |
967 | case MACVLAN_MODE_BRIDGE: | |
eb06acdc | 968 | case MACVLAN_MODE_PASSTHRU: |
27c0b1a8 AB |
969 | break; |
970 | default: | |
971 | return -EINVAL; | |
972 | } | |
973 | } | |
b863ceb7 PM |
974 | return 0; |
975 | } | |
976 | ||
fc0663d6 | 977 | int macvlan_common_newlink(struct net *src_net, struct net_device *dev, |
2f6a1b66 | 978 | struct nlattr *tb[], struct nlattr *data[]) |
b863ceb7 PM |
979 | { |
980 | struct macvlan_dev *vlan = netdev_priv(dev); | |
981 | struct macvlan_port *port; | |
982 | struct net_device *lowerdev; | |
983 | int err; | |
984 | ||
985 | if (!tb[IFLA_LINK]) | |
986 | return -EINVAL; | |
987 | ||
81adee47 | 988 | lowerdev = __dev_get_by_index(src_net, nla_get_u32(tb[IFLA_LINK])); |
b863ceb7 PM |
989 | if (lowerdev == NULL) |
990 | return -ENODEV; | |
991 | ||
d70f2cf5 | 992 | /* When creating macvlans or macvtaps on top of other macvlans - use |
b0832a29 | 993 | * the real device as the lowerdev. |
a6ca5f1d | 994 | */ |
d70f2cf5 KW |
995 | if (netif_is_macvlan(lowerdev)) |
996 | lowerdev = macvlan_dev_real_dev(lowerdev); | |
a6ca5f1d | 997 | |
b863ceb7 PM |
998 | if (!tb[IFLA_MTU]) |
999 | dev->mtu = lowerdev->mtu; | |
1000 | else if (dev->mtu > lowerdev->mtu) | |
1001 | return -EINVAL; | |
1002 | ||
1003 | if (!tb[IFLA_ADDRESS]) | |
7ce5d222 | 1004 | eth_hw_addr_random(dev); |
b863ceb7 | 1005 | |
a35e2c1b | 1006 | if (!macvlan_port_exists(lowerdev)) { |
b863ceb7 PM |
1007 | err = macvlan_port_create(lowerdev); |
1008 | if (err < 0) | |
1009 | return err; | |
1010 | } | |
e052f7e6 | 1011 | port = macvlan_port_get_rtnl(lowerdev); |
b863ceb7 | 1012 | |
eb06acdc SS |
1013 | /* Only 1 macvlan device can be created in passthru mode */ |
1014 | if (port->passthru) | |
1015 | return -EINVAL; | |
1016 | ||
b863ceb7 PM |
1017 | vlan->lowerdev = lowerdev; |
1018 | vlan->dev = dev; | |
1019 | vlan->port = port; | |
2be5c767 | 1020 | vlan->set_features = MACVLAN_FEATURES; |
c674ac30 | 1021 | vlan->nest_level = dev_get_nest_level(lowerdev, netif_is_macvlan) + 1; |
b863ceb7 | 1022 | |
27c0b1a8 AB |
1023 | vlan->mode = MACVLAN_MODE_VEPA; |
1024 | if (data && data[IFLA_MACVLAN_MODE]) | |
1025 | vlan->mode = nla_get_u32(data[IFLA_MACVLAN_MODE]); | |
1026 | ||
df8ef8f3 JF |
1027 | if (data && data[IFLA_MACVLAN_FLAGS]) |
1028 | vlan->flags = nla_get_u16(data[IFLA_MACVLAN_FLAGS]); | |
1029 | ||
eb06acdc | 1030 | if (vlan->mode == MACVLAN_MODE_PASSTHRU) { |
5e3c516b | 1031 | if (port->count) |
eb06acdc SS |
1032 | return -EINVAL; |
1033 | port->passthru = true; | |
8b98604e | 1034 | eth_hw_addr_inherit(dev, lowerdev); |
eb06acdc SS |
1035 | } |
1036 | ||
5e3c516b | 1037 | port->count += 1; |
47d4ab91 JF |
1038 | err = register_netdevice(dev); |
1039 | if (err < 0) | |
1040 | goto destroy_port; | |
1041 | ||
a6cc0cfa | 1042 | dev->priv_flags |= IFF_MACVLAN; |
7cd43db7 JP |
1043 | err = netdev_upper_dev_link(lowerdev, dev); |
1044 | if (err) | |
da37705c | 1045 | goto unregister_netdev; |
b863ceb7 | 1046 | |
233c7df0 | 1047 | list_add_tail_rcu(&vlan->list, &port->vlans); |
fc4a7489 | 1048 | netif_stacked_transfer_operstate(lowerdev, dev); |
f16d3d57 | 1049 | |
b863ceb7 | 1050 | return 0; |
f16d3d57 | 1051 | |
da37705c CW |
1052 | unregister_netdev: |
1053 | unregister_netdevice(dev); | |
f16d3d57 | 1054 | destroy_port: |
5e3c516b DM |
1055 | port->count -= 1; |
1056 | if (!port->count) | |
f16d3d57 JP |
1057 | macvlan_port_destroy(lowerdev); |
1058 | ||
1059 | return err; | |
b863ceb7 | 1060 | } |
fc0663d6 | 1061 | EXPORT_SYMBOL_GPL(macvlan_common_newlink); |
b863ceb7 | 1062 | |
fc0663d6 AB |
1063 | static int macvlan_newlink(struct net *src_net, struct net_device *dev, |
1064 | struct nlattr *tb[], struct nlattr *data[]) | |
1065 | { | |
2f6a1b66 | 1066 | return macvlan_common_newlink(src_net, dev, tb, data); |
fc0663d6 AB |
1067 | } |
1068 | ||
1069 | void macvlan_dellink(struct net_device *dev, struct list_head *head) | |
b863ceb7 PM |
1070 | { |
1071 | struct macvlan_dev *vlan = netdev_priv(dev); | |
b863ceb7 | 1072 | |
233c7df0 | 1073 | list_del_rcu(&vlan->list); |
23289a37 | 1074 | unregister_netdevice_queue(dev, head); |
7cd43db7 | 1075 | netdev_upper_dev_unlink(vlan->lowerdev, dev); |
b863ceb7 | 1076 | } |
fc0663d6 | 1077 | EXPORT_SYMBOL_GPL(macvlan_dellink); |
b863ceb7 | 1078 | |
27c0b1a8 AB |
1079 | static int macvlan_changelink(struct net_device *dev, |
1080 | struct nlattr *tb[], struct nlattr *data[]) | |
1081 | { | |
1082 | struct macvlan_dev *vlan = netdev_priv(dev); | |
266e8347 MT |
1083 | enum macvlan_mode mode; |
1084 | bool set_mode = false; | |
1085 | ||
1086 | /* Validate mode, but don't set yet: setting flags may fail. */ | |
1087 | if (data && data[IFLA_MACVLAN_MODE]) { | |
1088 | set_mode = true; | |
1089 | mode = nla_get_u32(data[IFLA_MACVLAN_MODE]); | |
1090 | /* Passthrough mode can't be set or cleared dynamically */ | |
1091 | if ((mode == MACVLAN_MODE_PASSTHRU) != | |
1092 | (vlan->mode == MACVLAN_MODE_PASSTHRU)) | |
1093 | return -EINVAL; | |
1094 | } | |
99ffc3e7 | 1095 | |
df8ef8f3 JF |
1096 | if (data && data[IFLA_MACVLAN_FLAGS]) { |
1097 | __u16 flags = nla_get_u16(data[IFLA_MACVLAN_FLAGS]); | |
1098 | bool promisc = (flags ^ vlan->flags) & MACVLAN_FLAG_NOPROMISC; | |
99ffc3e7 MT |
1099 | if (vlan->port->passthru && promisc) { |
1100 | int err; | |
1101 | ||
1102 | if (flags & MACVLAN_FLAG_NOPROMISC) | |
1103 | err = dev_set_promiscuity(vlan->lowerdev, -1); | |
1104 | else | |
1105 | err = dev_set_promiscuity(vlan->lowerdev, 1); | |
1106 | if (err < 0) | |
1107 | return err; | |
1108 | } | |
df8ef8f3 JF |
1109 | vlan->flags = flags; |
1110 | } | |
266e8347 MT |
1111 | if (set_mode) |
1112 | vlan->mode = mode; | |
27c0b1a8 AB |
1113 | return 0; |
1114 | } | |
1115 | ||
1116 | static size_t macvlan_get_size(const struct net_device *dev) | |
1117 | { | |
01fe944f ED |
1118 | return (0 |
1119 | + nla_total_size(4) /* IFLA_MACVLAN_MODE */ | |
1120 | + nla_total_size(2) /* IFLA_MACVLAN_FLAGS */ | |
1121 | ); | |
27c0b1a8 AB |
1122 | } |
1123 | ||
1124 | static int macvlan_fill_info(struct sk_buff *skb, | |
1125 | const struct net_device *dev) | |
1126 | { | |
1127 | struct macvlan_dev *vlan = netdev_priv(dev); | |
1128 | ||
ead9a76c DM |
1129 | if (nla_put_u32(skb, IFLA_MACVLAN_MODE, vlan->mode)) |
1130 | goto nla_put_failure; | |
df8ef8f3 JF |
1131 | if (nla_put_u16(skb, IFLA_MACVLAN_FLAGS, vlan->flags)) |
1132 | goto nla_put_failure; | |
27c0b1a8 AB |
1133 | return 0; |
1134 | ||
1135 | nla_put_failure: | |
1136 | return -EMSGSIZE; | |
1137 | } | |
1138 | ||
1139 | static const struct nla_policy macvlan_policy[IFLA_MACVLAN_MAX + 1] = { | |
df8ef8f3 JF |
1140 | [IFLA_MACVLAN_MODE] = { .type = NLA_U32 }, |
1141 | [IFLA_MACVLAN_FLAGS] = { .type = NLA_U16 }, | |
27c0b1a8 AB |
1142 | }; |
1143 | ||
fc0663d6 AB |
1144 | int macvlan_link_register(struct rtnl_link_ops *ops) |
1145 | { | |
1146 | /* common fields */ | |
1147 | ops->priv_size = sizeof(struct macvlan_dev); | |
fc0663d6 AB |
1148 | ops->validate = macvlan_validate; |
1149 | ops->maxtype = IFLA_MACVLAN_MAX; | |
1150 | ops->policy = macvlan_policy; | |
1151 | ops->changelink = macvlan_changelink; | |
1152 | ops->get_size = macvlan_get_size; | |
1153 | ops->fill_info = macvlan_fill_info; | |
1154 | ||
1155 | return rtnl_link_register(ops); | |
1156 | }; | |
1157 | EXPORT_SYMBOL_GPL(macvlan_link_register); | |
1158 | ||
1159 | static struct rtnl_link_ops macvlan_link_ops = { | |
b863ceb7 | 1160 | .kind = "macvlan", |
8a35747a | 1161 | .setup = macvlan_setup, |
b863ceb7 PM |
1162 | .newlink = macvlan_newlink, |
1163 | .dellink = macvlan_dellink, | |
1164 | }; | |
1165 | ||
1166 | static int macvlan_device_event(struct notifier_block *unused, | |
1167 | unsigned long event, void *ptr) | |
1168 | { | |
351638e7 | 1169 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); |
b863ceb7 PM |
1170 | struct macvlan_dev *vlan, *next; |
1171 | struct macvlan_port *port; | |
226bd341 | 1172 | LIST_HEAD(list_kill); |
b863ceb7 | 1173 | |
a35e2c1b | 1174 | if (!macvlan_port_exists(dev)) |
b863ceb7 PM |
1175 | return NOTIFY_DONE; |
1176 | ||
e052f7e6 | 1177 | port = macvlan_port_get_rtnl(dev); |
a35e2c1b | 1178 | |
b863ceb7 PM |
1179 | switch (event) { |
1180 | case NETDEV_CHANGE: | |
1181 | list_for_each_entry(vlan, &port->vlans, list) | |
fc4a7489 PM |
1182 | netif_stacked_transfer_operstate(vlan->lowerdev, |
1183 | vlan->dev); | |
b863ceb7 PM |
1184 | break; |
1185 | case NETDEV_FEAT_CHANGE: | |
1186 | list_for_each_entry(vlan, &port->vlans, list) { | |
8c2acc53 | 1187 | vlan->dev->gso_max_size = dev->gso_max_size; |
797f87f8 | 1188 | netdev_update_features(vlan->dev); |
b863ceb7 PM |
1189 | } |
1190 | break; | |
3763e7ef | 1191 | case NETDEV_CHANGEMTU: |
1192 | list_for_each_entry(vlan, &port->vlans, list) { | |
1193 | if (vlan->dev->mtu <= dev->mtu) | |
1194 | continue; | |
1195 | dev_set_mtu(vlan->dev, dev->mtu); | |
1196 | } | |
e289fd28 | 1197 | break; |
1198 | case NETDEV_CHANGEADDR: | |
1199 | if (!port->passthru) | |
1200 | return NOTIFY_DONE; | |
1201 | ||
1202 | vlan = list_first_entry_or_null(&port->vlans, | |
1203 | struct macvlan_dev, | |
1204 | list); | |
1205 | ||
1206 | if (macvlan_sync_address(vlan->dev, dev->dev_addr)) | |
1207 | return NOTIFY_BAD; | |
1208 | ||
3763e7ef | 1209 | break; |
b863ceb7 | 1210 | case NETDEV_UNREGISTER: |
3b27e105 DL |
1211 | /* twiddle thumbs on netns device moves */ |
1212 | if (dev->reg_state != NETREG_UNREGISTERING) | |
1213 | break; | |
1214 | ||
b863ceb7 | 1215 | list_for_each_entry_safe(vlan, next, &port->vlans, list) |
226bd341 ED |
1216 | vlan->dev->rtnl_link_ops->dellink(vlan->dev, &list_kill); |
1217 | unregister_netdevice_many(&list_kill); | |
b863ceb7 | 1218 | break; |
1c01fe14 JP |
1219 | case NETDEV_PRE_TYPE_CHANGE: |
1220 | /* Forbid underlaying device to change its type. */ | |
1221 | return NOTIFY_BAD; | |
4c991255 VY |
1222 | |
1223 | case NETDEV_NOTIFY_PEERS: | |
1224 | case NETDEV_BONDING_FAILOVER: | |
1225 | case NETDEV_RESEND_IGMP: | |
1226 | /* Propagate to all vlans */ | |
1227 | list_for_each_entry(vlan, &port->vlans, list) | |
1228 | call_netdevice_notifiers(event, vlan->dev); | |
b863ceb7 PM |
1229 | } |
1230 | return NOTIFY_DONE; | |
1231 | } | |
1232 | ||
1233 | static struct notifier_block macvlan_notifier_block __read_mostly = { | |
1234 | .notifier_call = macvlan_device_event, | |
1235 | }; | |
1236 | ||
1237 | static int __init macvlan_init_module(void) | |
1238 | { | |
1239 | int err; | |
1240 | ||
1241 | register_netdevice_notifier(&macvlan_notifier_block); | |
b863ceb7 | 1242 | |
fc0663d6 | 1243 | err = macvlan_link_register(&macvlan_link_ops); |
b863ceb7 PM |
1244 | if (err < 0) |
1245 | goto err1; | |
1246 | return 0; | |
1247 | err1: | |
b863ceb7 PM |
1248 | unregister_netdevice_notifier(&macvlan_notifier_block); |
1249 | return err; | |
1250 | } | |
1251 | ||
1252 | static void __exit macvlan_cleanup_module(void) | |
1253 | { | |
1254 | rtnl_link_unregister(&macvlan_link_ops); | |
b863ceb7 PM |
1255 | unregister_netdevice_notifier(&macvlan_notifier_block); |
1256 | } | |
1257 | ||
1258 | module_init(macvlan_init_module); | |
1259 | module_exit(macvlan_cleanup_module); | |
1260 | ||
1261 | MODULE_LICENSE("GPL"); | |
1262 | MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>"); | |
1263 | MODULE_DESCRIPTION("Driver for MAC address based VLANs"); | |
1264 | MODULE_ALIAS_RTNL_LINK("macvlan"); |