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Commit | Line | Data |
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b863ceb7 PM |
1 | /* |
2 | * Copyright (c) 2007 Patrick McHardy <kaber@trash.net> | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or | |
5 | * modify it under the terms of the GNU General Public License as | |
6 | * published by the Free Software Foundation; either version 2 of | |
7 | * the License, or (at your option) any later version. | |
8 | * | |
9 | * The code this is based on carried the following copyright notice: | |
10 | * --- | |
11 | * (C) Copyright 2001-2006 | |
12 | * Alex Zeffertt, Cambridge Broadband Ltd, ajz@cambridgebroadband.com | |
13 | * Re-worked by Ben Greear <greearb@candelatech.com> | |
14 | * --- | |
15 | */ | |
16 | #include <linux/kernel.h> | |
17 | #include <linux/types.h> | |
18 | #include <linux/module.h> | |
19 | #include <linux/init.h> | |
20 | #include <linux/errno.h> | |
21 | #include <linux/slab.h> | |
22 | #include <linux/string.h> | |
82524746 | 23 | #include <linux/rculist.h> |
b863ceb7 PM |
24 | #include <linux/notifier.h> |
25 | #include <linux/netdevice.h> | |
26 | #include <linux/etherdevice.h> | |
27 | #include <linux/ethtool.h> | |
28 | #include <linux/if_arp.h> | |
87002b03 | 29 | #include <linux/if_vlan.h> |
b863ceb7 PM |
30 | #include <linux/if_link.h> |
31 | #include <linux/if_macvlan.h> | |
cd431e73 | 32 | #include <linux/hash.h> |
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 | 51 | struct hlist_head vlan_source_hash[MACVLAN_HASH_SIZE]; |
9c127a01 | 52 | DECLARE_BITMAP(mc_filter, MACVLAN_MC_FILTER_SZ); |
79cf79ab MB |
53 | }; |
54 | ||
55 | struct macvlan_source_entry { | |
56 | struct hlist_node hlist; | |
57 | struct macvlan_dev *vlan; | |
58 | unsigned char addr[6+2] __aligned(sizeof(u16)); | |
59 | struct rcu_head rcu; | |
b863ceb7 PM |
60 | }; |
61 | ||
412ca155 HX |
62 | struct macvlan_skb_cb { |
63 | const struct macvlan_dev *src; | |
64 | }; | |
65 | ||
66 | #define MACVLAN_SKB_CB(__skb) ((struct macvlan_skb_cb *)&((__skb)->cb[0])) | |
67 | ||
d5cd9244 EB |
68 | static void macvlan_port_destroy(struct net_device *dev); |
69 | ||
79cf79ab MB |
70 | /* Hash Ethernet address */ |
71 | static u32 macvlan_eth_hash(const unsigned char *addr) | |
72 | { | |
73 | u64 value = get_unaligned((u64 *)addr); | |
74 | ||
75 | /* only want 6 bytes */ | |
76 | #ifdef __BIG_ENDIAN | |
77 | value >>= 16; | |
78 | #else | |
79 | value <<= 16; | |
80 | #endif | |
81 | return hash_64(value, MACVLAN_HASH_BITS); | |
82 | } | |
83 | ||
e052f7e6 ED |
84 | static struct macvlan_port *macvlan_port_get_rcu(const struct net_device *dev) |
85 | { | |
86 | return rcu_dereference(dev->rx_handler_data); | |
87 | } | |
88 | ||
89 | static struct macvlan_port *macvlan_port_get_rtnl(const struct net_device *dev) | |
90 | { | |
91 | return rtnl_dereference(dev->rx_handler_data); | |
92 | } | |
93 | ||
a35e2c1b JP |
94 | #define macvlan_port_exists(dev) (dev->priv_flags & IFF_MACVLAN_PORT) |
95 | ||
b863ceb7 PM |
96 | static struct macvlan_dev *macvlan_hash_lookup(const struct macvlan_port *port, |
97 | const unsigned char *addr) | |
98 | { | |
99 | struct macvlan_dev *vlan; | |
79cf79ab | 100 | u32 idx = macvlan_eth_hash(addr); |
b863ceb7 | 101 | |
79cf79ab | 102 | hlist_for_each_entry_rcu(vlan, &port->vlan_hash[idx], hlist) { |
a6700db1 | 103 | if (ether_addr_equal_64bits(vlan->dev->dev_addr, addr)) |
b863ceb7 PM |
104 | return vlan; |
105 | } | |
106 | return NULL; | |
107 | } | |
108 | ||
79cf79ab MB |
109 | static struct macvlan_source_entry *macvlan_hash_lookup_source( |
110 | const struct macvlan_dev *vlan, | |
111 | const unsigned char *addr) | |
112 | { | |
113 | struct macvlan_source_entry *entry; | |
114 | u32 idx = macvlan_eth_hash(addr); | |
115 | struct hlist_head *h = &vlan->port->vlan_source_hash[idx]; | |
116 | ||
117 | hlist_for_each_entry_rcu(entry, h, hlist) { | |
118 | if (ether_addr_equal_64bits(entry->addr, addr) && | |
119 | entry->vlan == vlan) | |
120 | return entry; | |
121 | } | |
122 | return NULL; | |
123 | } | |
124 | ||
125 | static int macvlan_hash_add_source(struct macvlan_dev *vlan, | |
126 | const unsigned char *addr) | |
127 | { | |
128 | struct macvlan_port *port = vlan->port; | |
129 | struct macvlan_source_entry *entry; | |
130 | struct hlist_head *h; | |
131 | ||
132 | entry = macvlan_hash_lookup_source(vlan, addr); | |
133 | if (entry) | |
134 | return 0; | |
135 | ||
136 | entry = kmalloc(sizeof(*entry), GFP_KERNEL); | |
137 | if (!entry) | |
138 | return -ENOMEM; | |
139 | ||
140 | ether_addr_copy(entry->addr, addr); | |
141 | entry->vlan = vlan; | |
142 | h = &port->vlan_source_hash[macvlan_eth_hash(addr)]; | |
143 | hlist_add_head_rcu(&entry->hlist, h); | |
144 | vlan->macaddr_count++; | |
145 | ||
146 | return 0; | |
147 | } | |
148 | ||
f9ac30f0 EB |
149 | static void macvlan_hash_add(struct macvlan_dev *vlan) |
150 | { | |
151 | struct macvlan_port *port = vlan->port; | |
152 | const unsigned char *addr = vlan->dev->dev_addr; | |
79cf79ab | 153 | u32 idx = macvlan_eth_hash(addr); |
f9ac30f0 | 154 | |
79cf79ab MB |
155 | hlist_add_head_rcu(&vlan->hlist, &port->vlan_hash[idx]); |
156 | } | |
157 | ||
158 | static void macvlan_hash_del_source(struct macvlan_source_entry *entry) | |
159 | { | |
160 | hlist_del_rcu(&entry->hlist); | |
161 | kfree_rcu(entry, rcu); | |
f9ac30f0 EB |
162 | } |
163 | ||
449f4544 | 164 | static void macvlan_hash_del(struct macvlan_dev *vlan, bool sync) |
f9ac30f0 EB |
165 | { |
166 | hlist_del_rcu(&vlan->hlist); | |
449f4544 ED |
167 | if (sync) |
168 | synchronize_rcu(); | |
f9ac30f0 EB |
169 | } |
170 | ||
171 | static void macvlan_hash_change_addr(struct macvlan_dev *vlan, | |
172 | const unsigned char *addr) | |
173 | { | |
449f4544 | 174 | macvlan_hash_del(vlan, true); |
f9ac30f0 EB |
175 | /* Now that we are unhashed it is safe to change the device |
176 | * address without confusing packet delivery. | |
177 | */ | |
178 | memcpy(vlan->dev->dev_addr, addr, ETH_ALEN); | |
179 | macvlan_hash_add(vlan); | |
180 | } | |
181 | ||
182 | static int macvlan_addr_busy(const struct macvlan_port *port, | |
183 | const unsigned char *addr) | |
184 | { | |
185 | /* Test to see if the specified multicast address is | |
186 | * currently in use by the underlying device or | |
187 | * another macvlan. | |
188 | */ | |
a6700db1 | 189 | if (ether_addr_equal_64bits(port->dev->dev_addr, addr)) |
f9ac30f0 EB |
190 | return 1; |
191 | ||
192 | if (macvlan_hash_lookup(port, addr)) | |
193 | return 1; | |
194 | ||
195 | return 0; | |
196 | } | |
197 | ||
a1e514c5 | 198 | |
fc0663d6 AB |
199 | static int macvlan_broadcast_one(struct sk_buff *skb, |
200 | const struct macvlan_dev *vlan, | |
618e1b74 | 201 | const struct ethhdr *eth, bool local) |
a1e514c5 | 202 | { |
fc0663d6 | 203 | struct net_device *dev = vlan->dev; |
a1e514c5 | 204 | |
618e1b74 | 205 | if (local) |
412ca155 | 206 | return __dev_forward_skb(dev, skb); |
618e1b74 | 207 | |
a1e514c5 | 208 | skb->dev = dev; |
a6700db1 | 209 | if (ether_addr_equal_64bits(eth->h_dest, dev->broadcast)) |
a1e514c5 AB |
210 | skb->pkt_type = PACKET_BROADCAST; |
211 | else | |
212 | skb->pkt_type = PACKET_MULTICAST; | |
213 | ||
412ca155 | 214 | return 0; |
a1e514c5 AB |
215 | } |
216 | ||
3807ff58 ED |
217 | static u32 macvlan_hash_mix(const struct macvlan_dev *vlan) |
218 | { | |
219 | return (u32)(((unsigned long)vlan) >> L1_CACHE_SHIFT); | |
220 | } | |
221 | ||
222 | ||
223 | static unsigned int mc_hash(const struct macvlan_dev *vlan, | |
224 | const unsigned char *addr) | |
cd431e73 ED |
225 | { |
226 | u32 val = __get_unaligned_cpu32(addr + 2); | |
227 | ||
3807ff58 | 228 | val ^= macvlan_hash_mix(vlan); |
cd431e73 ED |
229 | return hash_32(val, MACVLAN_MC_FILTER_BITS); |
230 | } | |
231 | ||
b863ceb7 | 232 | static void macvlan_broadcast(struct sk_buff *skb, |
618e1b74 AB |
233 | const struct macvlan_port *port, |
234 | struct net_device *src, | |
235 | enum macvlan_mode mode) | |
b863ceb7 PM |
236 | { |
237 | const struct ethhdr *eth = eth_hdr(skb); | |
238 | const struct macvlan_dev *vlan; | |
b863ceb7 PM |
239 | struct sk_buff *nskb; |
240 | unsigned int i; | |
a1e514c5 | 241 | int err; |
3807ff58 | 242 | unsigned int hash; |
b863ceb7 | 243 | |
efbbced3 PM |
244 | if (skb->protocol == htons(ETH_P_PAUSE)) |
245 | return; | |
246 | ||
b863ceb7 | 247 | for (i = 0; i < MACVLAN_HASH_SIZE; i++) { |
b67bfe0d | 248 | hlist_for_each_entry_rcu(vlan, &port->vlan_hash[i], hlist) { |
618e1b74 AB |
249 | if (vlan->dev == src || !(vlan->mode & mode)) |
250 | continue; | |
251 | ||
3807ff58 | 252 | hash = mc_hash(vlan, eth->h_dest); |
cd431e73 ED |
253 | if (!test_bit(hash, vlan->mc_filter)) |
254 | continue; | |
de9e8f3f HX |
255 | |
256 | err = NET_RX_DROP; | |
b863ceb7 | 257 | nskb = skb_clone(skb, GFP_ATOMIC); |
de9e8f3f HX |
258 | if (likely(nskb)) |
259 | err = macvlan_broadcast_one( | |
260 | nskb, vlan, eth, | |
412ca155 HX |
261 | mode == MACVLAN_MODE_BRIDGE) ?: |
262 | netif_rx_ni(nskb); | |
a1e514c5 | 263 | macvlan_count_rx(vlan, skb->len + ETH_HLEN, |
4c979935 | 264 | err == NET_RX_SUCCESS, true); |
b863ceb7 PM |
265 | } |
266 | } | |
267 | } | |
268 | ||
412ca155 | 269 | static void macvlan_process_broadcast(struct work_struct *w) |
b863ceb7 | 270 | { |
412ca155 HX |
271 | struct macvlan_port *port = container_of(w, struct macvlan_port, |
272 | bc_work); | |
273 | struct sk_buff *skb; | |
274 | struct sk_buff_head list; | |
275 | ||
fe0ca732 | 276 | __skb_queue_head_init(&list); |
412ca155 HX |
277 | |
278 | spin_lock_bh(&port->bc_queue.lock); | |
279 | skb_queue_splice_tail_init(&port->bc_queue, &list); | |
280 | spin_unlock_bh(&port->bc_queue.lock); | |
281 | ||
282 | while ((skb = __skb_dequeue(&list))) { | |
283 | const struct macvlan_dev *src = MACVLAN_SKB_CB(skb)->src; | |
284 | ||
285 | rcu_read_lock(); | |
b863ceb7 | 286 | |
618e1b74 AB |
287 | if (!src) |
288 | /* frame comes from an external address */ | |
289 | macvlan_broadcast(skb, port, NULL, | |
290 | MACVLAN_MODE_PRIVATE | | |
291 | MACVLAN_MODE_VEPA | | |
eb06acdc | 292 | MACVLAN_MODE_PASSTHRU| |
618e1b74 AB |
293 | MACVLAN_MODE_BRIDGE); |
294 | else if (src->mode == MACVLAN_MODE_VEPA) | |
295 | /* flood to everyone except source */ | |
296 | macvlan_broadcast(skb, port, src->dev, | |
297 | MACVLAN_MODE_VEPA | | |
298 | MACVLAN_MODE_BRIDGE); | |
412ca155 | 299 | else |
618e1b74 AB |
300 | /* |
301 | * flood only to VEPA ports, bridge ports | |
302 | * already saw the frame on the way out. | |
303 | */ | |
304 | macvlan_broadcast(skb, port, src->dev, | |
305 | MACVLAN_MODE_VEPA); | |
412ca155 HX |
306 | |
307 | rcu_read_unlock(); | |
308 | ||
260916df HX |
309 | if (src) |
310 | dev_put(src->dev); | |
412ca155 HX |
311 | kfree_skb(skb); |
312 | } | |
313 | } | |
314 | ||
315 | static void macvlan_broadcast_enqueue(struct macvlan_port *port, | |
260916df | 316 | const struct macvlan_dev *src, |
412ca155 HX |
317 | struct sk_buff *skb) |
318 | { | |
e676f197 | 319 | struct sk_buff *nskb; |
412ca155 HX |
320 | int err = -ENOMEM; |
321 | ||
e676f197 HX |
322 | nskb = skb_clone(skb, GFP_ATOMIC); |
323 | if (!nskb) | |
412ca155 HX |
324 | goto err; |
325 | ||
260916df HX |
326 | MACVLAN_SKB_CB(nskb)->src = src; |
327 | ||
412ca155 | 328 | spin_lock(&port->bc_queue.lock); |
07d92d5c | 329 | if (skb_queue_len(&port->bc_queue) < MACVLAN_BC_QUEUE_LEN) { |
260916df HX |
330 | if (src) |
331 | dev_hold(src->dev); | |
e676f197 | 332 | __skb_queue_tail(&port->bc_queue, nskb); |
412ca155 HX |
333 | err = 0; |
334 | } | |
335 | spin_unlock(&port->bc_queue.lock); | |
336 | ||
337 | if (err) | |
e676f197 | 338 | goto free_nskb; |
412ca155 HX |
339 | |
340 | schedule_work(&port->bc_work); | |
341 | return; | |
342 | ||
e676f197 HX |
343 | free_nskb: |
344 | kfree_skb(nskb); | |
412ca155 HX |
345 | err: |
346 | atomic_long_inc(&skb->dev->rx_dropped); | |
347 | } | |
348 | ||
79cf79ab MB |
349 | static void macvlan_flush_sources(struct macvlan_port *port, |
350 | struct macvlan_dev *vlan) | |
351 | { | |
352 | int i; | |
353 | ||
354 | for (i = 0; i < MACVLAN_HASH_SIZE; i++) { | |
355 | struct hlist_node *h, *n; | |
356 | ||
357 | hlist_for_each_safe(h, n, &port->vlan_source_hash[i]) { | |
358 | struct macvlan_source_entry *entry; | |
359 | ||
360 | entry = hlist_entry(h, struct macvlan_source_entry, | |
361 | hlist); | |
362 | if (entry->vlan == vlan) | |
363 | macvlan_hash_del_source(entry); | |
364 | } | |
365 | } | |
366 | vlan->macaddr_count = 0; | |
367 | } | |
368 | ||
369 | static void macvlan_forward_source_one(struct sk_buff *skb, | |
370 | struct macvlan_dev *vlan) | |
371 | { | |
372 | struct sk_buff *nskb; | |
373 | struct net_device *dev; | |
374 | int len; | |
375 | int ret; | |
376 | ||
377 | dev = vlan->dev; | |
378 | if (unlikely(!(dev->flags & IFF_UP))) | |
379 | return; | |
380 | ||
381 | nskb = skb_clone(skb, GFP_ATOMIC); | |
382 | if (!nskb) | |
383 | return; | |
384 | ||
385 | len = nskb->len + ETH_HLEN; | |
386 | nskb->dev = dev; | |
387 | nskb->pkt_type = PACKET_HOST; | |
388 | ||
389 | ret = netif_rx(nskb); | |
4c979935 | 390 | macvlan_count_rx(vlan, len, ret == NET_RX_SUCCESS, false); |
79cf79ab MB |
391 | } |
392 | ||
393 | static void macvlan_forward_source(struct sk_buff *skb, | |
394 | struct macvlan_port *port, | |
395 | const unsigned char *addr) | |
396 | { | |
397 | struct macvlan_source_entry *entry; | |
398 | u32 idx = macvlan_eth_hash(addr); | |
399 | struct hlist_head *h = &port->vlan_source_hash[idx]; | |
400 | ||
401 | hlist_for_each_entry_rcu(entry, h, hlist) { | |
402 | if (ether_addr_equal_64bits(entry->addr, addr)) | |
403 | if (entry->vlan->dev->flags & IFF_UP) | |
404 | macvlan_forward_source_one(skb, entry->vlan); | |
405 | } | |
406 | } | |
407 | ||
412ca155 HX |
408 | /* called under rcu_read_lock() from netif_receive_skb */ |
409 | static rx_handler_result_t macvlan_handle_frame(struct sk_buff **pskb) | |
410 | { | |
411 | struct macvlan_port *port; | |
412 | struct sk_buff *skb = *pskb; | |
413 | const struct ethhdr *eth = eth_hdr(skb); | |
414 | const struct macvlan_dev *vlan; | |
415 | const struct macvlan_dev *src; | |
416 | struct net_device *dev; | |
417 | unsigned int len = 0; | |
d1dd9119 | 418 | int ret; |
419 | rx_handler_result_t handle_res; | |
412ca155 HX |
420 | |
421 | port = macvlan_port_get_rcu(skb->dev); | |
422 | if (is_multicast_ether_addr(eth->h_dest)) { | |
9c127a01 HX |
423 | unsigned int hash; |
424 | ||
19bcf9f2 | 425 | skb = ip_check_defrag(dev_net(skb->dev), skb, IP_DEFRAG_MACVLAN); |
412ca155 HX |
426 | if (!skb) |
427 | return RX_HANDLER_CONSUMED; | |
e639b8d8 | 428 | *pskb = skb; |
412ca155 | 429 | eth = eth_hdr(skb); |
79cf79ab | 430 | macvlan_forward_source(skb, port, eth->h_source); |
412ca155 HX |
431 | src = macvlan_hash_lookup(port, eth->h_source); |
432 | if (src && src->mode != MACVLAN_MODE_VEPA && | |
433 | src->mode != MACVLAN_MODE_BRIDGE) { | |
729e72a1 | 434 | /* forward to original port. */ |
435 | vlan = src; | |
412ca155 HX |
436 | ret = macvlan_broadcast_one(skb, vlan, eth, 0) ?: |
437 | netif_rx(skb); | |
d1dd9119 | 438 | handle_res = RX_HANDLER_CONSUMED; |
729e72a1 | 439 | goto out; |
440 | } | |
441 | ||
9c127a01 HX |
442 | hash = mc_hash(NULL, eth->h_dest); |
443 | if (test_bit(hash, port->mc_filter)) | |
444 | macvlan_broadcast_enqueue(port, src, skb); | |
412ca155 | 445 | |
8a4eb573 | 446 | return RX_HANDLER_PASS; |
b863ceb7 PM |
447 | } |
448 | ||
79cf79ab | 449 | macvlan_forward_source(skb, port, eth->h_source); |
eb06acdc | 450 | if (port->passthru) |
233c7df0 JP |
451 | vlan = list_first_or_null_rcu(&port->vlans, |
452 | struct macvlan_dev, list); | |
eb06acdc SS |
453 | else |
454 | vlan = macvlan_hash_lookup(port, eth->h_dest); | |
b863ceb7 | 455 | if (vlan == NULL) |
8a4eb573 | 456 | return RX_HANDLER_PASS; |
b863ceb7 PM |
457 | |
458 | dev = vlan->dev; | |
459 | if (unlikely(!(dev->flags & IFF_UP))) { | |
460 | kfree_skb(skb); | |
8a4eb573 | 461 | return RX_HANDLER_CONSUMED; |
b863ceb7 | 462 | } |
a1e514c5 | 463 | len = skb->len + ETH_HLEN; |
b863ceb7 | 464 | skb = skb_share_check(skb, GFP_ATOMIC); |
d1dd9119 | 465 | if (!skb) { |
466 | ret = NET_RX_DROP; | |
467 | handle_res = RX_HANDLER_CONSUMED; | |
ba01877f | 468 | goto out; |
d1dd9119 | 469 | } |
b863ceb7 | 470 | |
e639b8d8 | 471 | *pskb = skb; |
b863ceb7 PM |
472 | skb->dev = dev; |
473 | skb->pkt_type = PACKET_HOST; | |
474 | ||
d1dd9119 | 475 | ret = NET_RX_SUCCESS; |
476 | handle_res = RX_HANDLER_ANOTHER; | |
ba01877f | 477 | out: |
4c979935 | 478 | macvlan_count_rx(vlan, len, ret == NET_RX_SUCCESS, false); |
d1dd9119 | 479 | return handle_res; |
b863ceb7 PM |
480 | } |
481 | ||
618e1b74 AB |
482 | static int macvlan_queue_xmit(struct sk_buff *skb, struct net_device *dev) |
483 | { | |
484 | const struct macvlan_dev *vlan = netdev_priv(dev); | |
485 | const struct macvlan_port *port = vlan->port; | |
486 | const struct macvlan_dev *dest; | |
487 | ||
488 | if (vlan->mode == MACVLAN_MODE_BRIDGE) { | |
489 | const struct ethhdr *eth = (void *)skb->data; | |
490 | ||
491 | /* send to other bridge ports directly */ | |
492 | if (is_multicast_ether_addr(eth->h_dest)) { | |
493 | macvlan_broadcast(skb, port, dev, MACVLAN_MODE_BRIDGE); | |
494 | goto xmit_world; | |
495 | } | |
496 | ||
497 | dest = macvlan_hash_lookup(port, eth->h_dest); | |
498 | if (dest && dest->mode == MACVLAN_MODE_BRIDGE) { | |
a37dd333 | 499 | /* send to lowerdev first for its network taps */ |
cb2d0f3e | 500 | dev_forward_skb(vlan->lowerdev, skb); |
618e1b74 AB |
501 | |
502 | return NET_XMIT_SUCCESS; | |
503 | } | |
504 | } | |
505 | ||
506 | xmit_world: | |
59b9997b | 507 | skb->dev = vlan->lowerdev; |
618e1b74 AB |
508 | return dev_queue_xmit(skb); |
509 | } | |
510 | ||
688cea83 | 511 | static inline netdev_tx_t macvlan_netpoll_send_skb(struct macvlan_dev *vlan, struct sk_buff *skb) |
512 | { | |
513 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
514 | if (vlan->netpoll) | |
515 | netpoll_send_skb(vlan->netpoll, skb); | |
516 | #else | |
517 | BUG(); | |
518 | #endif | |
519 | return NETDEV_TX_OK; | |
520 | } | |
521 | ||
0db901bd | 522 | static netdev_tx_t macvlan_start_xmit(struct sk_buff *skb, |
523 | struct net_device *dev) | |
b863ceb7 | 524 | { |
b863ceb7 PM |
525 | unsigned int len = skb->len; |
526 | int ret; | |
688cea83 | 527 | struct macvlan_dev *vlan = netdev_priv(dev); |
528 | ||
529 | if (unlikely(netpoll_tx_running(dev))) | |
530 | return macvlan_netpoll_send_skb(vlan, skb); | |
b863ceb7 | 531 | |
a6cc0cfa JF |
532 | if (vlan->fwd_priv) { |
533 | skb->dev = vlan->lowerdev; | |
f663dd9a | 534 | ret = dev_queue_xmit_accel(skb, vlan->fwd_priv); |
a6cc0cfa JF |
535 | } else { |
536 | ret = macvlan_queue_xmit(skb, dev); | |
537 | } | |
538 | ||
2d6c9ffc | 539 | if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) { |
cdf3e274 | 540 | struct vlan_pcpu_stats *pcpu_stats; |
2c114553 | 541 | |
8ffab51b ED |
542 | pcpu_stats = this_cpu_ptr(vlan->pcpu_stats); |
543 | u64_stats_update_begin(&pcpu_stats->syncp); | |
544 | pcpu_stats->tx_packets++; | |
545 | pcpu_stats->tx_bytes += len; | |
546 | u64_stats_update_end(&pcpu_stats->syncp); | |
547 | } else { | |
548 | this_cpu_inc(vlan->pcpu_stats->tx_dropped); | |
549 | } | |
cbbef5e1 | 550 | return ret; |
b863ceb7 PM |
551 | } |
552 | ||
553 | static int macvlan_hard_header(struct sk_buff *skb, struct net_device *dev, | |
3b04ddde SH |
554 | unsigned short type, const void *daddr, |
555 | const void *saddr, unsigned len) | |
b863ceb7 PM |
556 | { |
557 | const struct macvlan_dev *vlan = netdev_priv(dev); | |
558 | struct net_device *lowerdev = vlan->lowerdev; | |
559 | ||
0c4e8581 SH |
560 | return dev_hard_header(skb, lowerdev, type, daddr, |
561 | saddr ? : dev->dev_addr, len); | |
b863ceb7 PM |
562 | } |
563 | ||
3b04ddde SH |
564 | static const struct header_ops macvlan_hard_header_ops = { |
565 | .create = macvlan_hard_header, | |
3b04ddde | 566 | .parse = eth_header_parse, |
3b04ddde SH |
567 | .cache = eth_header_cache, |
568 | .cache_update = eth_header_cache_update, | |
569 | }; | |
570 | ||
b13ba1b8 JW |
571 | static struct rtnl_link_ops macvlan_link_ops; |
572 | ||
b863ceb7 PM |
573 | static int macvlan_open(struct net_device *dev) |
574 | { | |
575 | struct macvlan_dev *vlan = netdev_priv(dev); | |
b863ceb7 PM |
576 | struct net_device *lowerdev = vlan->lowerdev; |
577 | int err; | |
578 | ||
eb06acdc | 579 | if (vlan->port->passthru) { |
78738141 MT |
580 | if (!(vlan->flags & MACVLAN_FLAG_NOPROMISC)) { |
581 | err = dev_set_promiscuity(lowerdev, 1); | |
582 | if (err < 0) | |
583 | goto out; | |
584 | } | |
eb06acdc SS |
585 | goto hash_add; |
586 | } | |
587 | ||
b13ba1b8 JW |
588 | if (lowerdev->features & NETIF_F_HW_L2FW_DOFFLOAD && |
589 | dev->rtnl_link_ops == &macvlan_link_ops) { | |
a6cc0cfa JF |
590 | vlan->fwd_priv = |
591 | lowerdev->netdev_ops->ndo_dfwd_add_station(lowerdev, dev); | |
592 | ||
593 | /* If we get a NULL pointer back, or if we get an error | |
594 | * then we should just fall through to the non accelerated path | |
595 | */ | |
596 | if (IS_ERR_OR_NULL(vlan->fwd_priv)) { | |
597 | vlan->fwd_priv = NULL; | |
f663dd9a | 598 | } else |
a6cc0cfa | 599 | return 0; |
a6cc0cfa JF |
600 | } |
601 | ||
f9ac30f0 EB |
602 | err = -EBUSY; |
603 | if (macvlan_addr_busy(vlan->port, dev->dev_addr)) | |
604 | goto out; | |
605 | ||
a748ee24 | 606 | err = dev_uc_add(lowerdev, dev->dev_addr); |
b863ceb7 | 607 | if (err < 0) |
b89fb7da WC |
608 | goto out; |
609 | if (dev->flags & IFF_ALLMULTI) { | |
610 | err = dev_set_allmulti(lowerdev, 1); | |
611 | if (err < 0) | |
612 | goto del_unicast; | |
613 | } | |
eb06acdc | 614 | |
efdbd2b3 VY |
615 | if (dev->flags & IFF_PROMISC) { |
616 | err = dev_set_promiscuity(lowerdev, 1); | |
617 | if (err < 0) | |
618 | goto clear_multi; | |
619 | } | |
620 | ||
eb06acdc | 621 | hash_add: |
f9ac30f0 | 622 | macvlan_hash_add(vlan); |
b863ceb7 | 623 | return 0; |
b89fb7da | 624 | |
efdbd2b3 VY |
625 | clear_multi: |
626 | dev_set_allmulti(lowerdev, -1); | |
b89fb7da | 627 | del_unicast: |
a748ee24 | 628 | dev_uc_del(lowerdev, dev->dev_addr); |
b89fb7da | 629 | out: |
a6cc0cfa JF |
630 | if (vlan->fwd_priv) { |
631 | lowerdev->netdev_ops->ndo_dfwd_del_station(lowerdev, | |
632 | vlan->fwd_priv); | |
633 | vlan->fwd_priv = NULL; | |
634 | } | |
b89fb7da | 635 | return err; |
b863ceb7 PM |
636 | } |
637 | ||
638 | static int macvlan_stop(struct net_device *dev) | |
639 | { | |
640 | struct macvlan_dev *vlan = netdev_priv(dev); | |
641 | struct net_device *lowerdev = vlan->lowerdev; | |
642 | ||
a6cc0cfa JF |
643 | if (vlan->fwd_priv) { |
644 | lowerdev->netdev_ops->ndo_dfwd_del_station(lowerdev, | |
645 | vlan->fwd_priv); | |
646 | vlan->fwd_priv = NULL; | |
647 | return 0; | |
648 | } | |
649 | ||
df8ef8f3 JF |
650 | dev_uc_unsync(lowerdev, dev); |
651 | dev_mc_unsync(lowerdev, dev); | |
652 | ||
eb06acdc | 653 | if (vlan->port->passthru) { |
df8ef8f3 JF |
654 | if (!(vlan->flags & MACVLAN_FLAG_NOPROMISC)) |
655 | dev_set_promiscuity(lowerdev, -1); | |
eb06acdc SS |
656 | goto hash_del; |
657 | } | |
658 | ||
b863ceb7 PM |
659 | if (dev->flags & IFF_ALLMULTI) |
660 | dev_set_allmulti(lowerdev, -1); | |
661 | ||
efdbd2b3 VY |
662 | if (dev->flags & IFF_PROMISC) |
663 | dev_set_promiscuity(lowerdev, -1); | |
664 | ||
a748ee24 | 665 | dev_uc_del(lowerdev, dev->dev_addr); |
b863ceb7 | 666 | |
eb06acdc | 667 | hash_del: |
449f4544 | 668 | macvlan_hash_del(vlan, !dev->dismantle); |
b863ceb7 PM |
669 | return 0; |
670 | } | |
671 | ||
e289fd28 | 672 | static int macvlan_sync_address(struct net_device *dev, unsigned char *addr) |
ad5d20a6 PM |
673 | { |
674 | struct macvlan_dev *vlan = netdev_priv(dev); | |
675 | struct net_device *lowerdev = vlan->lowerdev; | |
ad5d20a6 PM |
676 | int err; |
677 | ||
f9ac30f0 EB |
678 | if (!(dev->flags & IFF_UP)) { |
679 | /* Just copy in the new address */ | |
e289fd28 | 680 | ether_addr_copy(dev->dev_addr, addr); |
f9ac30f0 EB |
681 | } else { |
682 | /* Rehash and update the device filters */ | |
e289fd28 | 683 | if (macvlan_addr_busy(vlan->port, addr)) |
f9ac30f0 | 684 | return -EBUSY; |
ad5d20a6 | 685 | |
e289fd28 | 686 | if (!vlan->port->passthru) { |
687 | err = dev_uc_add(lowerdev, addr); | |
688 | if (err) | |
689 | return err; | |
ad5d20a6 | 690 | |
e289fd28 | 691 | dev_uc_del(lowerdev, dev->dev_addr); |
692 | } | |
f9ac30f0 | 693 | |
e289fd28 | 694 | macvlan_hash_change_addr(vlan, addr); |
f9ac30f0 | 695 | } |
ad5d20a6 PM |
696 | return 0; |
697 | } | |
698 | ||
e289fd28 | 699 | static int macvlan_set_mac_address(struct net_device *dev, void *p) |
700 | { | |
701 | struct macvlan_dev *vlan = netdev_priv(dev); | |
702 | struct sockaddr *addr = p; | |
703 | ||
704 | if (!is_valid_ether_addr(addr->sa_data)) | |
705 | return -EADDRNOTAVAIL; | |
706 | ||
707 | if (vlan->mode == MACVLAN_MODE_PASSTHRU) { | |
708 | dev_set_mac_address(vlan->lowerdev, addr); | |
709 | return 0; | |
710 | } | |
711 | ||
712 | return macvlan_sync_address(dev, addr->sa_data); | |
713 | } | |
714 | ||
b863ceb7 PM |
715 | static void macvlan_change_rx_flags(struct net_device *dev, int change) |
716 | { | |
717 | struct macvlan_dev *vlan = netdev_priv(dev); | |
718 | struct net_device *lowerdev = vlan->lowerdev; | |
719 | ||
bbeb0ead PC |
720 | if (dev->flags & IFF_UP) { |
721 | if (change & IFF_ALLMULTI) | |
722 | dev_set_allmulti(lowerdev, dev->flags & IFF_ALLMULTI ? 1 : -1); | |
efdbd2b3 VY |
723 | if (change & IFF_PROMISC) |
724 | dev_set_promiscuity(lowerdev, | |
725 | dev->flags & IFF_PROMISC ? 1 : -1); | |
726 | ||
bbeb0ead | 727 | } |
b863ceb7 PM |
728 | } |
729 | ||
9c127a01 HX |
730 | static void macvlan_compute_filter(unsigned long *mc_filter, |
731 | struct net_device *dev, | |
732 | struct macvlan_dev *vlan) | |
b863ceb7 | 733 | { |
cd431e73 | 734 | if (dev->flags & (IFF_PROMISC | IFF_ALLMULTI)) { |
9c127a01 | 735 | bitmap_fill(mc_filter, MACVLAN_MC_FILTER_SZ); |
cd431e73 ED |
736 | } else { |
737 | struct netdev_hw_addr *ha; | |
738 | DECLARE_BITMAP(filter, MACVLAN_MC_FILTER_SZ); | |
739 | ||
740 | bitmap_zero(filter, MACVLAN_MC_FILTER_SZ); | |
741 | netdev_for_each_mc_addr(ha, dev) { | |
3807ff58 | 742 | __set_bit(mc_hash(vlan, ha->addr), filter); |
cd431e73 | 743 | } |
d5270430 | 744 | |
3807ff58 | 745 | __set_bit(mc_hash(vlan, dev->broadcast), filter); |
d5270430 | 746 | |
9c127a01 | 747 | bitmap_copy(mc_filter, filter, MACVLAN_MC_FILTER_SZ); |
cd431e73 | 748 | } |
9c127a01 HX |
749 | } |
750 | ||
751 | static void macvlan_set_mac_lists(struct net_device *dev) | |
752 | { | |
753 | struct macvlan_dev *vlan = netdev_priv(dev); | |
754 | ||
755 | macvlan_compute_filter(vlan->mc_filter, dev, vlan); | |
756 | ||
df8ef8f3 | 757 | dev_uc_sync(vlan->lowerdev, dev); |
b863ceb7 | 758 | dev_mc_sync(vlan->lowerdev, dev); |
9c127a01 HX |
759 | |
760 | /* This is slightly inaccurate as we're including the subscription | |
761 | * list of vlan->lowerdev too. | |
762 | * | |
763 | * Bug alert: This only works if everyone has the same broadcast | |
764 | * address as lowerdev. As soon as someone changes theirs this | |
765 | * will break. | |
766 | * | |
767 | * However, this is already broken as when you change your broadcast | |
768 | * address we don't get called. | |
769 | * | |
770 | * The solution is to maintain a list of broadcast addresses like | |
771 | * we do for uc/mc, if you care. | |
772 | */ | |
773 | macvlan_compute_filter(vlan->port->mc_filter, vlan->lowerdev, NULL); | |
b863ceb7 PM |
774 | } |
775 | ||
776 | static int macvlan_change_mtu(struct net_device *dev, int new_mtu) | |
777 | { | |
778 | struct macvlan_dev *vlan = netdev_priv(dev); | |
779 | ||
780 | if (new_mtu < 68 || vlan->lowerdev->mtu < new_mtu) | |
781 | return -EINVAL; | |
782 | dev->mtu = new_mtu; | |
783 | return 0; | |
784 | } | |
785 | ||
786 | /* | |
787 | * macvlan network devices have devices nesting below it and are a special | |
788 | * "super class" of normal network devices; split their locks off into a | |
789 | * separate class since they always nest. | |
790 | */ | |
cf508b12 | 791 | static struct lock_class_key macvlan_netdev_addr_lock_key; |
b863ceb7 | 792 | |
8b4703e9 | 793 | #define ALWAYS_ON_FEATURES \ |
c8cd0989 | 794 | (NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_GSO_SOFTWARE | NETIF_F_LLTX | \ |
a523a5ec | 795 | NETIF_F_GSO_ROBUST) |
8b4703e9 | 796 | |
b863ceb7 | 797 | #define MACVLAN_FEATURES \ |
a188222b | 798 | (NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST | \ |
62dbe830 | 799 | NETIF_F_GSO | NETIF_F_TSO | NETIF_F_UFO | NETIF_F_LRO | \ |
8d13e670 | 800 | NETIF_F_TSO_ECN | NETIF_F_TSO6 | NETIF_F_GRO | NETIF_F_RXCSUM | \ |
28d2b136 | 801 | NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_HW_VLAN_STAG_FILTER) |
b863ceb7 PM |
802 | |
803 | #define MACVLAN_STATE_MASK \ | |
804 | ((1<<__LINK_STATE_NOCARRIER) | (1<<__LINK_STATE_DORMANT)) | |
805 | ||
c674ac30 VY |
806 | static int macvlan_get_nest_level(struct net_device *dev) |
807 | { | |
808 | return ((struct macvlan_dev *)netdev_priv(dev))->nest_level; | |
809 | } | |
810 | ||
c773e847 DM |
811 | static void macvlan_set_lockdep_class(struct net_device *dev) |
812 | { | |
24ffd752 | 813 | netdev_lockdep_set_classes(dev); |
c674ac30 VY |
814 | lockdep_set_class_and_subclass(&dev->addr_list_lock, |
815 | &macvlan_netdev_addr_lock_key, | |
816 | macvlan_get_nest_level(dev)); | |
c773e847 DM |
817 | } |
818 | ||
b863ceb7 PM |
819 | static int macvlan_init(struct net_device *dev) |
820 | { | |
821 | struct macvlan_dev *vlan = netdev_priv(dev); | |
822 | const struct net_device *lowerdev = vlan->lowerdev; | |
30837960 | 823 | struct macvlan_port *port = vlan->port; |
b863ceb7 PM |
824 | |
825 | dev->state = (dev->state & ~MACVLAN_STATE_MASK) | | |
826 | (lowerdev->state & MACVLAN_STATE_MASK); | |
827 | dev->features = lowerdev->features & MACVLAN_FEATURES; | |
8b4703e9 | 828 | dev->features |= ALWAYS_ON_FEATURES; |
62dbe830 | 829 | dev->hw_features |= NETIF_F_LRO; |
081e83a7 | 830 | dev->vlan_features = lowerdev->vlan_features & MACVLAN_FEATURES; |
8c2acc53 | 831 | dev->gso_max_size = lowerdev->gso_max_size; |
f6773c5e | 832 | dev->gso_max_segs = lowerdev->gso_max_segs; |
ef5c8996 | 833 | dev->hard_header_len = lowerdev->hard_header_len; |
b863ceb7 | 834 | |
c773e847 DM |
835 | macvlan_set_lockdep_class(dev); |
836 | ||
1c213bd2 | 837 | vlan->pcpu_stats = netdev_alloc_pcpu_stats(struct vlan_pcpu_stats); |
8ffab51b | 838 | if (!vlan->pcpu_stats) |
fccaf710 ED |
839 | return -ENOMEM; |
840 | ||
30837960 FR |
841 | port->count += 1; |
842 | ||
b863ceb7 PM |
843 | return 0; |
844 | } | |
845 | ||
fccaf710 ED |
846 | static void macvlan_uninit(struct net_device *dev) |
847 | { | |
848 | struct macvlan_dev *vlan = netdev_priv(dev); | |
d5cd9244 | 849 | struct macvlan_port *port = vlan->port; |
fccaf710 | 850 | |
8ffab51b | 851 | free_percpu(vlan->pcpu_stats); |
d5cd9244 | 852 | |
79cf79ab | 853 | macvlan_flush_sources(port, vlan); |
5e3c516b DM |
854 | port->count -= 1; |
855 | if (!port->count) | |
d5cd9244 | 856 | macvlan_port_destroy(port->dev); |
fccaf710 ED |
857 | } |
858 | ||
28172739 ED |
859 | static struct rtnl_link_stats64 *macvlan_dev_get_stats64(struct net_device *dev, |
860 | struct rtnl_link_stats64 *stats) | |
fccaf710 | 861 | { |
fccaf710 ED |
862 | struct macvlan_dev *vlan = netdev_priv(dev); |
863 | ||
8ffab51b | 864 | if (vlan->pcpu_stats) { |
cdf3e274 | 865 | struct vlan_pcpu_stats *p; |
8ffab51b ED |
866 | u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes; |
867 | u32 rx_errors = 0, tx_dropped = 0; | |
bc66154e | 868 | unsigned int start; |
fccaf710 ED |
869 | int i; |
870 | ||
871 | for_each_possible_cpu(i) { | |
8ffab51b | 872 | p = per_cpu_ptr(vlan->pcpu_stats, i); |
bc66154e | 873 | do { |
57a7744e | 874 | start = u64_stats_fetch_begin_irq(&p->syncp); |
bc66154e ED |
875 | rx_packets = p->rx_packets; |
876 | rx_bytes = p->rx_bytes; | |
877 | rx_multicast = p->rx_multicast; | |
8ffab51b ED |
878 | tx_packets = p->tx_packets; |
879 | tx_bytes = p->tx_bytes; | |
57a7744e | 880 | } while (u64_stats_fetch_retry_irq(&p->syncp, start)); |
8ffab51b ED |
881 | |
882 | stats->rx_packets += rx_packets; | |
883 | stats->rx_bytes += rx_bytes; | |
884 | stats->multicast += rx_multicast; | |
885 | stats->tx_packets += tx_packets; | |
886 | stats->tx_bytes += tx_bytes; | |
887 | /* rx_errors & tx_dropped are u32, updated | |
888 | * without syncp protection. | |
889 | */ | |
890 | rx_errors += p->rx_errors; | |
891 | tx_dropped += p->tx_dropped; | |
fccaf710 | 892 | } |
8ffab51b ED |
893 | stats->rx_errors = rx_errors; |
894 | stats->rx_dropped = rx_errors; | |
895 | stats->tx_dropped = tx_dropped; | |
fccaf710 ED |
896 | } |
897 | return stats; | |
898 | } | |
899 | ||
8e586137 | 900 | static int macvlan_vlan_rx_add_vid(struct net_device *dev, |
80d5c368 | 901 | __be16 proto, u16 vid) |
8d13e670 JF |
902 | { |
903 | struct macvlan_dev *vlan = netdev_priv(dev); | |
904 | struct net_device *lowerdev = vlan->lowerdev; | |
8d13e670 | 905 | |
80d5c368 | 906 | return vlan_vid_add(lowerdev, proto, vid); |
8d13e670 JF |
907 | } |
908 | ||
8e586137 | 909 | static int macvlan_vlan_rx_kill_vid(struct net_device *dev, |
80d5c368 | 910 | __be16 proto, u16 vid) |
8d13e670 JF |
911 | { |
912 | struct macvlan_dev *vlan = netdev_priv(dev); | |
913 | struct net_device *lowerdev = vlan->lowerdev; | |
8d13e670 | 914 | |
80d5c368 | 915 | vlan_vid_del(lowerdev, proto, vid); |
8e586137 | 916 | return 0; |
8d13e670 JF |
917 | } |
918 | ||
edc7d573 | 919 | static int macvlan_fdb_add(struct ndmsg *ndm, struct nlattr *tb[], |
df8ef8f3 | 920 | struct net_device *dev, |
f6f6424b | 921 | const unsigned char *addr, u16 vid, |
df8ef8f3 JF |
922 | u16 flags) |
923 | { | |
924 | struct macvlan_dev *vlan = netdev_priv(dev); | |
925 | int err = -EINVAL; | |
926 | ||
8a50f11c VY |
927 | /* Support unicast filter only on passthru devices. |
928 | * Multicast filter should be allowed on all devices. | |
929 | */ | |
930 | if (!vlan->port->passthru && is_unicast_ether_addr(addr)) | |
df8ef8f3 JF |
931 | return -EOPNOTSUPP; |
932 | ||
ab2cfbb2 TR |
933 | if (flags & NLM_F_REPLACE) |
934 | return -EOPNOTSUPP; | |
935 | ||
df8ef8f3 JF |
936 | if (is_unicast_ether_addr(addr)) |
937 | err = dev_uc_add_excl(dev, addr); | |
938 | else if (is_multicast_ether_addr(addr)) | |
939 | err = dev_mc_add_excl(dev, addr); | |
940 | ||
941 | return err; | |
942 | } | |
943 | ||
1690be63 | 944 | static int macvlan_fdb_del(struct ndmsg *ndm, struct nlattr *tb[], |
df8ef8f3 | 945 | struct net_device *dev, |
f6f6424b | 946 | const unsigned char *addr, u16 vid) |
df8ef8f3 JF |
947 | { |
948 | struct macvlan_dev *vlan = netdev_priv(dev); | |
949 | int err = -EINVAL; | |
950 | ||
8a50f11c VY |
951 | /* Support unicast filter only on passthru devices. |
952 | * Multicast filter should be allowed on all devices. | |
953 | */ | |
954 | if (!vlan->port->passthru && is_unicast_ether_addr(addr)) | |
df8ef8f3 JF |
955 | return -EOPNOTSUPP; |
956 | ||
957 | if (is_unicast_ether_addr(addr)) | |
958 | err = dev_uc_del(dev, addr); | |
959 | else if (is_multicast_ether_addr(addr)) | |
960 | err = dev_mc_del(dev, addr); | |
961 | ||
962 | return err; | |
963 | } | |
964 | ||
b863ceb7 PM |
965 | static void macvlan_ethtool_get_drvinfo(struct net_device *dev, |
966 | struct ethtool_drvinfo *drvinfo) | |
967 | { | |
7826d43f JP |
968 | strlcpy(drvinfo->driver, "macvlan", sizeof(drvinfo->driver)); |
969 | strlcpy(drvinfo->version, "0.1", sizeof(drvinfo->version)); | |
b863ceb7 PM |
970 | } |
971 | ||
85f95819 DD |
972 | static int macvlan_ethtool_get_link_ksettings(struct net_device *dev, |
973 | struct ethtool_link_ksettings *cmd) | |
9edb8bb6 SH |
974 | { |
975 | const struct macvlan_dev *vlan = netdev_priv(dev); | |
4bc71cb9 | 976 | |
85f95819 | 977 | return __ethtool_get_link_ksettings(vlan->lowerdev, cmd); |
9edb8bb6 SH |
978 | } |
979 | ||
2be5c767 VY |
980 | static netdev_features_t macvlan_fix_features(struct net_device *dev, |
981 | netdev_features_t features) | |
982 | { | |
983 | struct macvlan_dev *vlan = netdev_priv(dev); | |
62dbe830 | 984 | netdev_features_t lowerdev_features = vlan->lowerdev->features; |
797f87f8 | 985 | netdev_features_t mask; |
2be5c767 | 986 | |
797f87f8 FW |
987 | features |= NETIF_F_ALL_FOR_ALL; |
988 | features &= (vlan->set_features | ~MACVLAN_FEATURES); | |
989 | mask = features; | |
990 | ||
62dbe830 MK |
991 | lowerdev_features &= (features | ~NETIF_F_LRO); |
992 | features = netdev_increment_features(lowerdev_features, features, mask); | |
8b4703e9 | 993 | features |= ALWAYS_ON_FEATURES; |
0d0162e7 | 994 | features &= ~NETIF_F_NETNS_LOCAL; |
797f87f8 FW |
995 | |
996 | return features; | |
2be5c767 VY |
997 | } |
998 | ||
688cea83 | 999 | #ifdef CONFIG_NET_POLL_CONTROLLER |
1000 | static void macvlan_dev_poll_controller(struct net_device *dev) | |
1001 | { | |
1002 | return; | |
1003 | } | |
1004 | ||
1005 | static int macvlan_dev_netpoll_setup(struct net_device *dev, struct netpoll_info *npinfo) | |
1006 | { | |
1007 | struct macvlan_dev *vlan = netdev_priv(dev); | |
1008 | struct net_device *real_dev = vlan->lowerdev; | |
1009 | struct netpoll *netpoll; | |
1010 | int err = 0; | |
1011 | ||
1012 | netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL); | |
1013 | err = -ENOMEM; | |
1014 | if (!netpoll) | |
1015 | goto out; | |
1016 | ||
1017 | err = __netpoll_setup(netpoll, real_dev); | |
1018 | if (err) { | |
1019 | kfree(netpoll); | |
1020 | goto out; | |
1021 | } | |
1022 | ||
1023 | vlan->netpoll = netpoll; | |
1024 | ||
1025 | out: | |
1026 | return err; | |
1027 | } | |
1028 | ||
1029 | static void macvlan_dev_netpoll_cleanup(struct net_device *dev) | |
1030 | { | |
1031 | struct macvlan_dev *vlan = netdev_priv(dev); | |
1032 | struct netpoll *netpoll = vlan->netpoll; | |
1033 | ||
1034 | if (!netpoll) | |
1035 | return; | |
1036 | ||
1037 | vlan->netpoll = NULL; | |
1038 | ||
1039 | __netpoll_free_async(netpoll); | |
1040 | } | |
1041 | #endif /* CONFIG_NET_POLL_CONTROLLER */ | |
1042 | ||
ef5fa6bc ND |
1043 | static int macvlan_dev_get_iflink(const struct net_device *dev) |
1044 | { | |
1045 | struct macvlan_dev *vlan = netdev_priv(dev); | |
1046 | ||
1047 | return vlan->lowerdev->ifindex; | |
1048 | } | |
1049 | ||
b863ceb7 PM |
1050 | static const struct ethtool_ops macvlan_ethtool_ops = { |
1051 | .get_link = ethtool_op_get_link, | |
85f95819 | 1052 | .get_link_ksettings = macvlan_ethtool_get_link_ksettings, |
b863ceb7 PM |
1053 | .get_drvinfo = macvlan_ethtool_get_drvinfo, |
1054 | }; | |
1055 | ||
54a30c97 SH |
1056 | static const struct net_device_ops macvlan_netdev_ops = { |
1057 | .ndo_init = macvlan_init, | |
fccaf710 | 1058 | .ndo_uninit = macvlan_uninit, |
54a30c97 SH |
1059 | .ndo_open = macvlan_open, |
1060 | .ndo_stop = macvlan_stop, | |
00829823 | 1061 | .ndo_start_xmit = macvlan_start_xmit, |
54a30c97 | 1062 | .ndo_change_mtu = macvlan_change_mtu, |
2be5c767 | 1063 | .ndo_fix_features = macvlan_fix_features, |
54a30c97 SH |
1064 | .ndo_change_rx_flags = macvlan_change_rx_flags, |
1065 | .ndo_set_mac_address = macvlan_set_mac_address, | |
df8ef8f3 | 1066 | .ndo_set_rx_mode = macvlan_set_mac_lists, |
bc66154e | 1067 | .ndo_get_stats64 = macvlan_dev_get_stats64, |
54a30c97 | 1068 | .ndo_validate_addr = eth_validate_addr, |
8d13e670 JF |
1069 | .ndo_vlan_rx_add_vid = macvlan_vlan_rx_add_vid, |
1070 | .ndo_vlan_rx_kill_vid = macvlan_vlan_rx_kill_vid, | |
df8ef8f3 JF |
1071 | .ndo_fdb_add = macvlan_fdb_add, |
1072 | .ndo_fdb_del = macvlan_fdb_del, | |
1073 | .ndo_fdb_dump = ndo_dflt_fdb_dump, | |
c674ac30 | 1074 | .ndo_get_lock_subclass = macvlan_get_nest_level, |
688cea83 | 1075 | #ifdef CONFIG_NET_POLL_CONTROLLER |
1076 | .ndo_poll_controller = macvlan_dev_poll_controller, | |
1077 | .ndo_netpoll_setup = macvlan_dev_netpoll_setup, | |
1078 | .ndo_netpoll_cleanup = macvlan_dev_netpoll_cleanup, | |
1079 | #endif | |
ef5fa6bc | 1080 | .ndo_get_iflink = macvlan_dev_get_iflink, |
f56e67b5 | 1081 | .ndo_features_check = passthru_features_check, |
54a30c97 SH |
1082 | }; |
1083 | ||
8a35747a | 1084 | void macvlan_common_setup(struct net_device *dev) |
b863ceb7 PM |
1085 | { |
1086 | ether_setup(dev); | |
1087 | ||
02875878 ED |
1088 | dev->priv_flags &= ~IFF_TX_SKB_SHARING; |
1089 | netif_keep_dst(dev); | |
87ab7f6f | 1090 | dev->priv_flags |= IFF_UNICAST_FLT; |
54a30c97 | 1091 | dev->netdev_ops = &macvlan_netdev_ops; |
b863ceb7 | 1092 | dev->destructor = free_netdev; |
71740129 | 1093 | dev->header_ops = &macvlan_hard_header_ops; |
b863ceb7 | 1094 | dev->ethtool_ops = &macvlan_ethtool_ops; |
8a35747a HX |
1095 | } |
1096 | EXPORT_SYMBOL_GPL(macvlan_common_setup); | |
1097 | ||
1098 | static void macvlan_setup(struct net_device *dev) | |
1099 | { | |
1100 | macvlan_common_setup(dev); | |
7009212b | 1101 | dev->priv_flags |= IFF_NO_QUEUE; |
b863ceb7 PM |
1102 | } |
1103 | ||
1104 | static int macvlan_port_create(struct net_device *dev) | |
1105 | { | |
1106 | struct macvlan_port *port; | |
1107 | unsigned int i; | |
ab95bfe0 | 1108 | int err; |
b863ceb7 PM |
1109 | |
1110 | if (dev->type != ARPHRD_ETHER || dev->flags & IFF_LOOPBACK) | |
1111 | return -EINVAL; | |
1112 | ||
d6b00fec MB |
1113 | if (netif_is_ipvlan_port(dev)) |
1114 | return -EBUSY; | |
1115 | ||
b863ceb7 PM |
1116 | port = kzalloc(sizeof(*port), GFP_KERNEL); |
1117 | if (port == NULL) | |
1118 | return -ENOMEM; | |
1119 | ||
eb06acdc | 1120 | port->passthru = false; |
b863ceb7 PM |
1121 | port->dev = dev; |
1122 | INIT_LIST_HEAD(&port->vlans); | |
1123 | for (i = 0; i < MACVLAN_HASH_SIZE; i++) | |
1124 | INIT_HLIST_HEAD(&port->vlan_hash[i]); | |
79cf79ab MB |
1125 | for (i = 0; i < MACVLAN_HASH_SIZE; i++) |
1126 | INIT_HLIST_HEAD(&port->vlan_source_hash[i]); | |
ab95bfe0 | 1127 | |
412ca155 HX |
1128 | skb_queue_head_init(&port->bc_queue); |
1129 | INIT_WORK(&port->bc_work, macvlan_process_broadcast); | |
1130 | ||
a35e2c1b JP |
1131 | err = netdev_rx_handler_register(dev, macvlan_handle_frame, port); |
1132 | if (err) | |
ab95bfe0 | 1133 | kfree(port); |
d9351561 ED |
1134 | else |
1135 | dev->priv_flags |= IFF_MACVLAN_PORT; | |
ab95bfe0 | 1136 | return err; |
b863ceb7 PM |
1137 | } |
1138 | ||
1139 | static void macvlan_port_destroy(struct net_device *dev) | |
1140 | { | |
e052f7e6 | 1141 | struct macvlan_port *port = macvlan_port_get_rtnl(dev); |
b863ceb7 | 1142 | |
a35e2c1b | 1143 | dev->priv_flags &= ~IFF_MACVLAN_PORT; |
ab95bfe0 | 1144 | netdev_rx_handler_unregister(dev); |
fe0ca732 ED |
1145 | |
1146 | /* After this point, no packet can schedule bc_work anymore, | |
1147 | * but we need to cancel it and purge left skbs if any. | |
1148 | */ | |
1149 | cancel_work_sync(&port->bc_work); | |
1150 | __skb_queue_purge(&port->bc_queue); | |
1151 | ||
6e070aec | 1152 | kfree_rcu(port, rcu); |
b863ceb7 PM |
1153 | } |
1154 | ||
b863ceb7 PM |
1155 | static int macvlan_validate(struct nlattr *tb[], struct nlattr *data[]) |
1156 | { | |
1157 | if (tb[IFLA_ADDRESS]) { | |
1158 | if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) | |
1159 | return -EINVAL; | |
1160 | if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) | |
1161 | return -EADDRNOTAVAIL; | |
1162 | } | |
27c0b1a8 | 1163 | |
15127478 MT |
1164 | if (data && data[IFLA_MACVLAN_FLAGS] && |
1165 | nla_get_u16(data[IFLA_MACVLAN_FLAGS]) & ~MACVLAN_FLAG_NOPROMISC) | |
1166 | return -EINVAL; | |
1167 | ||
27c0b1a8 AB |
1168 | if (data && data[IFLA_MACVLAN_MODE]) { |
1169 | switch (nla_get_u32(data[IFLA_MACVLAN_MODE])) { | |
1170 | case MACVLAN_MODE_PRIVATE: | |
1171 | case MACVLAN_MODE_VEPA: | |
1172 | case MACVLAN_MODE_BRIDGE: | |
eb06acdc | 1173 | case MACVLAN_MODE_PASSTHRU: |
79cf79ab MB |
1174 | case MACVLAN_MODE_SOURCE: |
1175 | break; | |
1176 | default: | |
1177 | return -EINVAL; | |
1178 | } | |
1179 | } | |
1180 | ||
1181 | if (data && data[IFLA_MACVLAN_MACADDR_MODE]) { | |
1182 | switch (nla_get_u32(data[IFLA_MACVLAN_MACADDR_MODE])) { | |
1183 | case MACVLAN_MACADDR_ADD: | |
1184 | case MACVLAN_MACADDR_DEL: | |
1185 | case MACVLAN_MACADDR_FLUSH: | |
1186 | case MACVLAN_MACADDR_SET: | |
27c0b1a8 AB |
1187 | break; |
1188 | default: | |
1189 | return -EINVAL; | |
1190 | } | |
1191 | } | |
79cf79ab MB |
1192 | |
1193 | if (data && data[IFLA_MACVLAN_MACADDR]) { | |
1194 | if (nla_len(data[IFLA_MACVLAN_MACADDR]) != ETH_ALEN) | |
1195 | return -EINVAL; | |
1196 | ||
1197 | if (!is_valid_ether_addr(nla_data(data[IFLA_MACVLAN_MACADDR]))) | |
1198 | return -EADDRNOTAVAIL; | |
1199 | } | |
1200 | ||
1201 | if (data && data[IFLA_MACVLAN_MACADDR_COUNT]) | |
1202 | return -EINVAL; | |
1203 | ||
1204 | return 0; | |
1205 | } | |
1206 | ||
1207 | /** | |
1208 | * reconfigure list of remote source mac address | |
1209 | * (only for macvlan devices in source mode) | |
1210 | * Note regarding alignment: all netlink data is aligned to 4 Byte, which | |
1211 | * suffices for both ether_addr_copy and ether_addr_equal_64bits usage. | |
1212 | */ | |
1213 | static int macvlan_changelink_sources(struct macvlan_dev *vlan, u32 mode, | |
1214 | struct nlattr *data[]) | |
1215 | { | |
1216 | char *addr = NULL; | |
1217 | int ret, rem, len; | |
1218 | struct nlattr *nla, *head; | |
1219 | struct macvlan_source_entry *entry; | |
1220 | ||
1221 | if (data[IFLA_MACVLAN_MACADDR]) | |
1222 | addr = nla_data(data[IFLA_MACVLAN_MACADDR]); | |
1223 | ||
1224 | if (mode == MACVLAN_MACADDR_ADD) { | |
1225 | if (!addr) | |
1226 | return -EINVAL; | |
1227 | ||
1228 | return macvlan_hash_add_source(vlan, addr); | |
1229 | ||
1230 | } else if (mode == MACVLAN_MACADDR_DEL) { | |
1231 | if (!addr) | |
1232 | return -EINVAL; | |
1233 | ||
1234 | entry = macvlan_hash_lookup_source(vlan, addr); | |
1235 | if (entry) { | |
1236 | macvlan_hash_del_source(entry); | |
1237 | vlan->macaddr_count--; | |
1238 | } | |
1239 | } else if (mode == MACVLAN_MACADDR_FLUSH) { | |
1240 | macvlan_flush_sources(vlan->port, vlan); | |
1241 | } else if (mode == MACVLAN_MACADDR_SET) { | |
1242 | macvlan_flush_sources(vlan->port, vlan); | |
1243 | ||
1244 | if (addr) { | |
1245 | ret = macvlan_hash_add_source(vlan, addr); | |
1246 | if (ret) | |
1247 | return ret; | |
1248 | } | |
1249 | ||
1250 | if (!data || !data[IFLA_MACVLAN_MACADDR_DATA]) | |
1251 | return 0; | |
1252 | ||
1253 | head = nla_data(data[IFLA_MACVLAN_MACADDR_DATA]); | |
1254 | len = nla_len(data[IFLA_MACVLAN_MACADDR_DATA]); | |
1255 | ||
1256 | nla_for_each_attr(nla, head, len, rem) { | |
1257 | if (nla_type(nla) != IFLA_MACVLAN_MACADDR || | |
1258 | nla_len(nla) != ETH_ALEN) | |
1259 | continue; | |
1260 | ||
1261 | addr = nla_data(nla); | |
1262 | ret = macvlan_hash_add_source(vlan, addr); | |
1263 | if (ret) | |
1264 | return ret; | |
1265 | } | |
1266 | } else { | |
1267 | return -EINVAL; | |
1268 | } | |
1269 | ||
b863ceb7 PM |
1270 | return 0; |
1271 | } | |
1272 | ||
fc0663d6 | 1273 | int macvlan_common_newlink(struct net *src_net, struct net_device *dev, |
2f6a1b66 | 1274 | struct nlattr *tb[], struct nlattr *data[]) |
b863ceb7 PM |
1275 | { |
1276 | struct macvlan_dev *vlan = netdev_priv(dev); | |
1277 | struct macvlan_port *port; | |
1278 | struct net_device *lowerdev; | |
1279 | int err; | |
79cf79ab | 1280 | int macmode; |
b863ceb7 PM |
1281 | |
1282 | if (!tb[IFLA_LINK]) | |
1283 | return -EINVAL; | |
1284 | ||
81adee47 | 1285 | lowerdev = __dev_get_by_index(src_net, nla_get_u32(tb[IFLA_LINK])); |
b863ceb7 PM |
1286 | if (lowerdev == NULL) |
1287 | return -ENODEV; | |
1288 | ||
d70f2cf5 | 1289 | /* When creating macvlans or macvtaps on top of other macvlans - use |
b0832a29 | 1290 | * the real device as the lowerdev. |
a6ca5f1d | 1291 | */ |
d70f2cf5 KW |
1292 | if (netif_is_macvlan(lowerdev)) |
1293 | lowerdev = macvlan_dev_real_dev(lowerdev); | |
a6ca5f1d | 1294 | |
b863ceb7 PM |
1295 | if (!tb[IFLA_MTU]) |
1296 | dev->mtu = lowerdev->mtu; | |
1297 | else if (dev->mtu > lowerdev->mtu) | |
1298 | return -EINVAL; | |
1299 | ||
1300 | if (!tb[IFLA_ADDRESS]) | |
7ce5d222 | 1301 | eth_hw_addr_random(dev); |
b863ceb7 | 1302 | |
a35e2c1b | 1303 | if (!macvlan_port_exists(lowerdev)) { |
b863ceb7 PM |
1304 | err = macvlan_port_create(lowerdev); |
1305 | if (err < 0) | |
1306 | return err; | |
1307 | } | |
e052f7e6 | 1308 | port = macvlan_port_get_rtnl(lowerdev); |
b863ceb7 | 1309 | |
eb06acdc SS |
1310 | /* Only 1 macvlan device can be created in passthru mode */ |
1311 | if (port->passthru) | |
1312 | return -EINVAL; | |
1313 | ||
b863ceb7 PM |
1314 | vlan->lowerdev = lowerdev; |
1315 | vlan->dev = dev; | |
1316 | vlan->port = port; | |
2be5c767 | 1317 | vlan->set_features = MACVLAN_FEATURES; |
952fcfd0 | 1318 | vlan->nest_level = dev_get_nest_level(lowerdev) + 1; |
b863ceb7 | 1319 | |
27c0b1a8 AB |
1320 | vlan->mode = MACVLAN_MODE_VEPA; |
1321 | if (data && data[IFLA_MACVLAN_MODE]) | |
1322 | vlan->mode = nla_get_u32(data[IFLA_MACVLAN_MODE]); | |
1323 | ||
df8ef8f3 JF |
1324 | if (data && data[IFLA_MACVLAN_FLAGS]) |
1325 | vlan->flags = nla_get_u16(data[IFLA_MACVLAN_FLAGS]); | |
1326 | ||
eb06acdc | 1327 | if (vlan->mode == MACVLAN_MODE_PASSTHRU) { |
5e3c516b | 1328 | if (port->count) |
eb06acdc SS |
1329 | return -EINVAL; |
1330 | port->passthru = true; | |
8b98604e | 1331 | eth_hw_addr_inherit(dev, lowerdev); |
eb06acdc SS |
1332 | } |
1333 | ||
79cf79ab MB |
1334 | if (data && data[IFLA_MACVLAN_MACADDR_MODE]) { |
1335 | if (vlan->mode != MACVLAN_MODE_SOURCE) | |
1336 | return -EINVAL; | |
1337 | macmode = nla_get_u32(data[IFLA_MACVLAN_MACADDR_MODE]); | |
1338 | err = macvlan_changelink_sources(vlan, macmode, data); | |
1339 | if (err) | |
1340 | return err; | |
1341 | } | |
1342 | ||
47d4ab91 JF |
1343 | err = register_netdevice(dev); |
1344 | if (err < 0) | |
30837960 | 1345 | return err; |
47d4ab91 | 1346 | |
a6cc0cfa | 1347 | dev->priv_flags |= IFF_MACVLAN; |
7cd43db7 JP |
1348 | err = netdev_upper_dev_link(lowerdev, dev); |
1349 | if (err) | |
da37705c | 1350 | goto unregister_netdev; |
b863ceb7 | 1351 | |
233c7df0 | 1352 | list_add_tail_rcu(&vlan->list, &port->vlans); |
fc4a7489 | 1353 | netif_stacked_transfer_operstate(lowerdev, dev); |
de7d244d | 1354 | linkwatch_fire_event(dev); |
f16d3d57 | 1355 | |
b863ceb7 | 1356 | return 0; |
f16d3d57 | 1357 | |
da37705c CW |
1358 | unregister_netdev: |
1359 | unregister_netdevice(dev); | |
f16d3d57 JP |
1360 | |
1361 | return err; | |
b863ceb7 | 1362 | } |
fc0663d6 | 1363 | EXPORT_SYMBOL_GPL(macvlan_common_newlink); |
b863ceb7 | 1364 | |
fc0663d6 AB |
1365 | static int macvlan_newlink(struct net *src_net, struct net_device *dev, |
1366 | struct nlattr *tb[], struct nlattr *data[]) | |
1367 | { | |
2f6a1b66 | 1368 | return macvlan_common_newlink(src_net, dev, tb, data); |
fc0663d6 AB |
1369 | } |
1370 | ||
1371 | void macvlan_dellink(struct net_device *dev, struct list_head *head) | |
b863ceb7 PM |
1372 | { |
1373 | struct macvlan_dev *vlan = netdev_priv(dev); | |
b863ceb7 | 1374 | |
79cf79ab MB |
1375 | if (vlan->mode == MACVLAN_MODE_SOURCE) |
1376 | macvlan_flush_sources(vlan->port, vlan); | |
233c7df0 | 1377 | list_del_rcu(&vlan->list); |
23289a37 | 1378 | unregister_netdevice_queue(dev, head); |
7cd43db7 | 1379 | netdev_upper_dev_unlink(vlan->lowerdev, dev); |
b863ceb7 | 1380 | } |
fc0663d6 | 1381 | EXPORT_SYMBOL_GPL(macvlan_dellink); |
b863ceb7 | 1382 | |
27c0b1a8 AB |
1383 | static int macvlan_changelink(struct net_device *dev, |
1384 | struct nlattr *tb[], struct nlattr *data[]) | |
1385 | { | |
1386 | struct macvlan_dev *vlan = netdev_priv(dev); | |
266e8347 MT |
1387 | enum macvlan_mode mode; |
1388 | bool set_mode = false; | |
79cf79ab MB |
1389 | enum macvlan_macaddr_mode macmode; |
1390 | int ret; | |
266e8347 MT |
1391 | |
1392 | /* Validate mode, but don't set yet: setting flags may fail. */ | |
1393 | if (data && data[IFLA_MACVLAN_MODE]) { | |
1394 | set_mode = true; | |
1395 | mode = nla_get_u32(data[IFLA_MACVLAN_MODE]); | |
1396 | /* Passthrough mode can't be set or cleared dynamically */ | |
1397 | if ((mode == MACVLAN_MODE_PASSTHRU) != | |
1398 | (vlan->mode == MACVLAN_MODE_PASSTHRU)) | |
1399 | return -EINVAL; | |
79cf79ab MB |
1400 | if (vlan->mode == MACVLAN_MODE_SOURCE && |
1401 | vlan->mode != mode) | |
1402 | macvlan_flush_sources(vlan->port, vlan); | |
266e8347 | 1403 | } |
99ffc3e7 | 1404 | |
df8ef8f3 JF |
1405 | if (data && data[IFLA_MACVLAN_FLAGS]) { |
1406 | __u16 flags = nla_get_u16(data[IFLA_MACVLAN_FLAGS]); | |
1407 | bool promisc = (flags ^ vlan->flags) & MACVLAN_FLAG_NOPROMISC; | |
99ffc3e7 MT |
1408 | if (vlan->port->passthru && promisc) { |
1409 | int err; | |
1410 | ||
1411 | if (flags & MACVLAN_FLAG_NOPROMISC) | |
1412 | err = dev_set_promiscuity(vlan->lowerdev, -1); | |
1413 | else | |
1414 | err = dev_set_promiscuity(vlan->lowerdev, 1); | |
1415 | if (err < 0) | |
1416 | return err; | |
1417 | } | |
df8ef8f3 JF |
1418 | vlan->flags = flags; |
1419 | } | |
266e8347 MT |
1420 | if (set_mode) |
1421 | vlan->mode = mode; | |
79cf79ab MB |
1422 | if (data && data[IFLA_MACVLAN_MACADDR_MODE]) { |
1423 | if (vlan->mode != MACVLAN_MODE_SOURCE) | |
1424 | return -EINVAL; | |
1425 | macmode = nla_get_u32(data[IFLA_MACVLAN_MACADDR_MODE]); | |
1426 | ret = macvlan_changelink_sources(vlan, macmode, data); | |
1427 | if (ret) | |
1428 | return ret; | |
1429 | } | |
27c0b1a8 AB |
1430 | return 0; |
1431 | } | |
1432 | ||
79cf79ab MB |
1433 | static size_t macvlan_get_size_mac(const struct macvlan_dev *vlan) |
1434 | { | |
1435 | if (vlan->macaddr_count == 0) | |
1436 | return 0; | |
1437 | return nla_total_size(0) /* IFLA_MACVLAN_MACADDR_DATA */ | |
1438 | + vlan->macaddr_count * nla_total_size(sizeof(u8) * ETH_ALEN); | |
1439 | } | |
1440 | ||
27c0b1a8 AB |
1441 | static size_t macvlan_get_size(const struct net_device *dev) |
1442 | { | |
79cf79ab MB |
1443 | struct macvlan_dev *vlan = netdev_priv(dev); |
1444 | ||
01fe944f ED |
1445 | return (0 |
1446 | + nla_total_size(4) /* IFLA_MACVLAN_MODE */ | |
1447 | + nla_total_size(2) /* IFLA_MACVLAN_FLAGS */ | |
79cf79ab MB |
1448 | + nla_total_size(4) /* IFLA_MACVLAN_MACADDR_COUNT */ |
1449 | + macvlan_get_size_mac(vlan) /* IFLA_MACVLAN_MACADDR */ | |
01fe944f | 1450 | ); |
27c0b1a8 AB |
1451 | } |
1452 | ||
79cf79ab MB |
1453 | static int macvlan_fill_info_macaddr(struct sk_buff *skb, |
1454 | const struct macvlan_dev *vlan, | |
1455 | const int i) | |
1456 | { | |
1457 | struct hlist_head *h = &vlan->port->vlan_source_hash[i]; | |
1458 | struct macvlan_source_entry *entry; | |
1459 | ||
1460 | hlist_for_each_entry_rcu(entry, h, hlist) { | |
1461 | if (entry->vlan != vlan) | |
1462 | continue; | |
1463 | if (nla_put(skb, IFLA_MACVLAN_MACADDR, ETH_ALEN, entry->addr)) | |
1464 | return 1; | |
1465 | } | |
1466 | return 0; | |
1467 | } | |
1468 | ||
27c0b1a8 AB |
1469 | static int macvlan_fill_info(struct sk_buff *skb, |
1470 | const struct net_device *dev) | |
1471 | { | |
1472 | struct macvlan_dev *vlan = netdev_priv(dev); | |
79cf79ab MB |
1473 | int i; |
1474 | struct nlattr *nest; | |
27c0b1a8 | 1475 | |
ead9a76c DM |
1476 | if (nla_put_u32(skb, IFLA_MACVLAN_MODE, vlan->mode)) |
1477 | goto nla_put_failure; | |
df8ef8f3 JF |
1478 | if (nla_put_u16(skb, IFLA_MACVLAN_FLAGS, vlan->flags)) |
1479 | goto nla_put_failure; | |
79cf79ab MB |
1480 | if (nla_put_u32(skb, IFLA_MACVLAN_MACADDR_COUNT, vlan->macaddr_count)) |
1481 | goto nla_put_failure; | |
1482 | if (vlan->macaddr_count > 0) { | |
1483 | nest = nla_nest_start(skb, IFLA_MACVLAN_MACADDR_DATA); | |
1484 | if (nest == NULL) | |
1485 | goto nla_put_failure; | |
1486 | ||
1487 | for (i = 0; i < MACVLAN_HASH_SIZE; i++) { | |
1488 | if (macvlan_fill_info_macaddr(skb, vlan, i)) | |
1489 | goto nla_put_failure; | |
1490 | } | |
1491 | nla_nest_end(skb, nest); | |
1492 | } | |
27c0b1a8 AB |
1493 | return 0; |
1494 | ||
1495 | nla_put_failure: | |
1496 | return -EMSGSIZE; | |
1497 | } | |
1498 | ||
1499 | static const struct nla_policy macvlan_policy[IFLA_MACVLAN_MAX + 1] = { | |
df8ef8f3 JF |
1500 | [IFLA_MACVLAN_MODE] = { .type = NLA_U32 }, |
1501 | [IFLA_MACVLAN_FLAGS] = { .type = NLA_U16 }, | |
79cf79ab MB |
1502 | [IFLA_MACVLAN_MACADDR_MODE] = { .type = NLA_U32 }, |
1503 | [IFLA_MACVLAN_MACADDR] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN }, | |
1504 | [IFLA_MACVLAN_MACADDR_DATA] = { .type = NLA_NESTED }, | |
1505 | [IFLA_MACVLAN_MACADDR_COUNT] = { .type = NLA_U32 }, | |
27c0b1a8 AB |
1506 | }; |
1507 | ||
fc0663d6 AB |
1508 | int macvlan_link_register(struct rtnl_link_ops *ops) |
1509 | { | |
1510 | /* common fields */ | |
1511 | ops->priv_size = sizeof(struct macvlan_dev); | |
fc0663d6 AB |
1512 | ops->validate = macvlan_validate; |
1513 | ops->maxtype = IFLA_MACVLAN_MAX; | |
1514 | ops->policy = macvlan_policy; | |
1515 | ops->changelink = macvlan_changelink; | |
1516 | ops->get_size = macvlan_get_size; | |
1517 | ops->fill_info = macvlan_fill_info; | |
1518 | ||
1519 | return rtnl_link_register(ops); | |
1520 | }; | |
1521 | EXPORT_SYMBOL_GPL(macvlan_link_register); | |
1522 | ||
eaca400f ND |
1523 | static struct net *macvlan_get_link_net(const struct net_device *dev) |
1524 | { | |
1525 | return dev_net(macvlan_dev_real_dev(dev)); | |
1526 | } | |
1527 | ||
fc0663d6 | 1528 | static struct rtnl_link_ops macvlan_link_ops = { |
b863ceb7 | 1529 | .kind = "macvlan", |
8a35747a | 1530 | .setup = macvlan_setup, |
b863ceb7 PM |
1531 | .newlink = macvlan_newlink, |
1532 | .dellink = macvlan_dellink, | |
eaca400f | 1533 | .get_link_net = macvlan_get_link_net, |
b863ceb7 PM |
1534 | }; |
1535 | ||
1536 | static int macvlan_device_event(struct notifier_block *unused, | |
1537 | unsigned long event, void *ptr) | |
1538 | { | |
351638e7 | 1539 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); |
b863ceb7 PM |
1540 | struct macvlan_dev *vlan, *next; |
1541 | struct macvlan_port *port; | |
226bd341 | 1542 | LIST_HEAD(list_kill); |
b863ceb7 | 1543 | |
a35e2c1b | 1544 | if (!macvlan_port_exists(dev)) |
b863ceb7 PM |
1545 | return NOTIFY_DONE; |
1546 | ||
e052f7e6 | 1547 | port = macvlan_port_get_rtnl(dev); |
a35e2c1b | 1548 | |
b863ceb7 | 1549 | switch (event) { |
de7d244d | 1550 | case NETDEV_UP: |
b863ceb7 PM |
1551 | case NETDEV_CHANGE: |
1552 | list_for_each_entry(vlan, &port->vlans, list) | |
fc4a7489 PM |
1553 | netif_stacked_transfer_operstate(vlan->lowerdev, |
1554 | vlan->dev); | |
b863ceb7 PM |
1555 | break; |
1556 | case NETDEV_FEAT_CHANGE: | |
1557 | list_for_each_entry(vlan, &port->vlans, list) { | |
8c2acc53 | 1558 | vlan->dev->gso_max_size = dev->gso_max_size; |
f6773c5e | 1559 | vlan->dev->gso_max_segs = dev->gso_max_segs; |
797f87f8 | 1560 | netdev_update_features(vlan->dev); |
b863ceb7 PM |
1561 | } |
1562 | break; | |
3763e7ef | 1563 | case NETDEV_CHANGEMTU: |
1564 | list_for_each_entry(vlan, &port->vlans, list) { | |
1565 | if (vlan->dev->mtu <= dev->mtu) | |
1566 | continue; | |
1567 | dev_set_mtu(vlan->dev, dev->mtu); | |
1568 | } | |
e289fd28 | 1569 | break; |
1570 | case NETDEV_CHANGEADDR: | |
1571 | if (!port->passthru) | |
1572 | return NOTIFY_DONE; | |
1573 | ||
1574 | vlan = list_first_entry_or_null(&port->vlans, | |
1575 | struct macvlan_dev, | |
1576 | list); | |
1577 | ||
1578 | if (macvlan_sync_address(vlan->dev, dev->dev_addr)) | |
1579 | return NOTIFY_BAD; | |
1580 | ||
3763e7ef | 1581 | break; |
b863ceb7 | 1582 | case NETDEV_UNREGISTER: |
3b27e105 DL |
1583 | /* twiddle thumbs on netns device moves */ |
1584 | if (dev->reg_state != NETREG_UNREGISTERING) | |
1585 | break; | |
1586 | ||
b863ceb7 | 1587 | list_for_each_entry_safe(vlan, next, &port->vlans, list) |
226bd341 ED |
1588 | vlan->dev->rtnl_link_ops->dellink(vlan->dev, &list_kill); |
1589 | unregister_netdevice_many(&list_kill); | |
b863ceb7 | 1590 | break; |
1c01fe14 JP |
1591 | case NETDEV_PRE_TYPE_CHANGE: |
1592 | /* Forbid underlaying device to change its type. */ | |
1593 | return NOTIFY_BAD; | |
4c991255 VY |
1594 | |
1595 | case NETDEV_NOTIFY_PEERS: | |
1596 | case NETDEV_BONDING_FAILOVER: | |
1597 | case NETDEV_RESEND_IGMP: | |
1598 | /* Propagate to all vlans */ | |
1599 | list_for_each_entry(vlan, &port->vlans, list) | |
1600 | call_netdevice_notifiers(event, vlan->dev); | |
b863ceb7 PM |
1601 | } |
1602 | return NOTIFY_DONE; | |
1603 | } | |
1604 | ||
1605 | static struct notifier_block macvlan_notifier_block __read_mostly = { | |
1606 | .notifier_call = macvlan_device_event, | |
1607 | }; | |
1608 | ||
1609 | static int __init macvlan_init_module(void) | |
1610 | { | |
1611 | int err; | |
1612 | ||
1613 | register_netdevice_notifier(&macvlan_notifier_block); | |
b863ceb7 | 1614 | |
fc0663d6 | 1615 | err = macvlan_link_register(&macvlan_link_ops); |
b863ceb7 PM |
1616 | if (err < 0) |
1617 | goto err1; | |
1618 | return 0; | |
1619 | err1: | |
b863ceb7 PM |
1620 | unregister_netdevice_notifier(&macvlan_notifier_block); |
1621 | return err; | |
1622 | } | |
1623 | ||
1624 | static void __exit macvlan_cleanup_module(void) | |
1625 | { | |
1626 | rtnl_link_unregister(&macvlan_link_ops); | |
b863ceb7 PM |
1627 | unregister_netdevice_notifier(&macvlan_notifier_block); |
1628 | } | |
1629 | ||
1630 | module_init(macvlan_init_module); | |
1631 | module_exit(macvlan_cleanup_module); | |
1632 | ||
1633 | MODULE_LICENSE("GPL"); | |
1634 | MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>"); | |
1635 | MODULE_DESCRIPTION("Driver for MAC address based VLANs"); | |
1636 | MODULE_ALIAS_RTNL_LINK("macvlan"); |