]>
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 | 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 | 41 | |
43c2d578 | 42 | #define MACVLAN_F_PASSTHRU 1 |
18c8c54d | 43 | #define MACVLAN_F_ADDRCHANGE 2 |
43c2d578 | 44 | |
b863ceb7 PM |
45 | struct macvlan_port { |
46 | struct net_device *dev; | |
47 | struct hlist_head vlan_hash[MACVLAN_HASH_SIZE]; | |
48 | struct list_head vlans; | |
412ca155 HX |
49 | struct sk_buff_head bc_queue; |
50 | struct work_struct bc_work; | |
43c2d578 | 51 | u32 flags; |
5e3c516b | 52 | int count; |
79cf79ab | 53 | struct hlist_head vlan_source_hash[MACVLAN_HASH_SIZE]; |
9c127a01 | 54 | DECLARE_BITMAP(mc_filter, MACVLAN_MC_FILTER_SZ); |
18c8c54d | 55 | unsigned char perm_addr[ETH_ALEN]; |
79cf79ab MB |
56 | }; |
57 | ||
58 | struct macvlan_source_entry { | |
59 | struct hlist_node hlist; | |
60 | struct macvlan_dev *vlan; | |
61 | unsigned char addr[6+2] __aligned(sizeof(u16)); | |
62 | struct rcu_head rcu; | |
b863ceb7 PM |
63 | }; |
64 | ||
412ca155 HX |
65 | struct macvlan_skb_cb { |
66 | const struct macvlan_dev *src; | |
67 | }; | |
68 | ||
69 | #define MACVLAN_SKB_CB(__skb) ((struct macvlan_skb_cb *)&((__skb)->cb[0])) | |
70 | ||
d5cd9244 EB |
71 | static void macvlan_port_destroy(struct net_device *dev); |
72 | ||
43c2d578 VY |
73 | static inline bool macvlan_passthru(const struct macvlan_port *port) |
74 | { | |
75 | return port->flags & MACVLAN_F_PASSTHRU; | |
76 | } | |
77 | ||
78 | static inline void macvlan_set_passthru(struct macvlan_port *port) | |
79 | { | |
80 | port->flags |= MACVLAN_F_PASSTHRU; | |
81 | } | |
82 | ||
18c8c54d VY |
83 | static inline bool macvlan_addr_change(const struct macvlan_port *port) |
84 | { | |
85 | return port->flags & MACVLAN_F_ADDRCHANGE; | |
86 | } | |
87 | ||
88 | static inline void macvlan_set_addr_change(struct macvlan_port *port) | |
89 | { | |
90 | port->flags |= MACVLAN_F_ADDRCHANGE; | |
91 | } | |
92 | ||
93 | static inline void macvlan_clear_addr_change(struct macvlan_port *port) | |
94 | { | |
95 | port->flags &= ~MACVLAN_F_ADDRCHANGE; | |
96 | } | |
97 | ||
79cf79ab MB |
98 | /* Hash Ethernet address */ |
99 | static u32 macvlan_eth_hash(const unsigned char *addr) | |
100 | { | |
101 | u64 value = get_unaligned((u64 *)addr); | |
102 | ||
103 | /* only want 6 bytes */ | |
104 | #ifdef __BIG_ENDIAN | |
105 | value >>= 16; | |
106 | #else | |
107 | value <<= 16; | |
108 | #endif | |
109 | return hash_64(value, MACVLAN_HASH_BITS); | |
110 | } | |
111 | ||
e052f7e6 ED |
112 | static struct macvlan_port *macvlan_port_get_rcu(const struct net_device *dev) |
113 | { | |
114 | return rcu_dereference(dev->rx_handler_data); | |
115 | } | |
116 | ||
117 | static struct macvlan_port *macvlan_port_get_rtnl(const struct net_device *dev) | |
118 | { | |
119 | return rtnl_dereference(dev->rx_handler_data); | |
120 | } | |
121 | ||
b863ceb7 PM |
122 | static struct macvlan_dev *macvlan_hash_lookup(const struct macvlan_port *port, |
123 | const unsigned char *addr) | |
124 | { | |
125 | struct macvlan_dev *vlan; | |
79cf79ab | 126 | u32 idx = macvlan_eth_hash(addr); |
b863ceb7 | 127 | |
79cf79ab | 128 | hlist_for_each_entry_rcu(vlan, &port->vlan_hash[idx], hlist) { |
a6700db1 | 129 | if (ether_addr_equal_64bits(vlan->dev->dev_addr, addr)) |
b863ceb7 PM |
130 | return vlan; |
131 | } | |
132 | return NULL; | |
133 | } | |
134 | ||
79cf79ab MB |
135 | static struct macvlan_source_entry *macvlan_hash_lookup_source( |
136 | const struct macvlan_dev *vlan, | |
137 | const unsigned char *addr) | |
138 | { | |
139 | struct macvlan_source_entry *entry; | |
140 | u32 idx = macvlan_eth_hash(addr); | |
141 | struct hlist_head *h = &vlan->port->vlan_source_hash[idx]; | |
142 | ||
143 | hlist_for_each_entry_rcu(entry, h, hlist) { | |
144 | if (ether_addr_equal_64bits(entry->addr, addr) && | |
145 | entry->vlan == vlan) | |
146 | return entry; | |
147 | } | |
148 | return NULL; | |
149 | } | |
150 | ||
151 | static int macvlan_hash_add_source(struct macvlan_dev *vlan, | |
152 | const unsigned char *addr) | |
153 | { | |
154 | struct macvlan_port *port = vlan->port; | |
155 | struct macvlan_source_entry *entry; | |
156 | struct hlist_head *h; | |
157 | ||
158 | entry = macvlan_hash_lookup_source(vlan, addr); | |
159 | if (entry) | |
160 | return 0; | |
161 | ||
162 | entry = kmalloc(sizeof(*entry), GFP_KERNEL); | |
163 | if (!entry) | |
164 | return -ENOMEM; | |
165 | ||
166 | ether_addr_copy(entry->addr, addr); | |
167 | entry->vlan = vlan; | |
168 | h = &port->vlan_source_hash[macvlan_eth_hash(addr)]; | |
169 | hlist_add_head_rcu(&entry->hlist, h); | |
170 | vlan->macaddr_count++; | |
171 | ||
172 | return 0; | |
173 | } | |
174 | ||
f9ac30f0 EB |
175 | static void macvlan_hash_add(struct macvlan_dev *vlan) |
176 | { | |
177 | struct macvlan_port *port = vlan->port; | |
178 | const unsigned char *addr = vlan->dev->dev_addr; | |
79cf79ab | 179 | u32 idx = macvlan_eth_hash(addr); |
f9ac30f0 | 180 | |
79cf79ab MB |
181 | hlist_add_head_rcu(&vlan->hlist, &port->vlan_hash[idx]); |
182 | } | |
183 | ||
184 | static void macvlan_hash_del_source(struct macvlan_source_entry *entry) | |
185 | { | |
186 | hlist_del_rcu(&entry->hlist); | |
187 | kfree_rcu(entry, rcu); | |
f9ac30f0 EB |
188 | } |
189 | ||
449f4544 | 190 | static void macvlan_hash_del(struct macvlan_dev *vlan, bool sync) |
f9ac30f0 EB |
191 | { |
192 | hlist_del_rcu(&vlan->hlist); | |
449f4544 ED |
193 | if (sync) |
194 | synchronize_rcu(); | |
f9ac30f0 EB |
195 | } |
196 | ||
197 | static void macvlan_hash_change_addr(struct macvlan_dev *vlan, | |
198 | const unsigned char *addr) | |
199 | { | |
449f4544 | 200 | macvlan_hash_del(vlan, true); |
f9ac30f0 EB |
201 | /* Now that we are unhashed it is safe to change the device |
202 | * address without confusing packet delivery. | |
203 | */ | |
204 | memcpy(vlan->dev->dev_addr, addr, ETH_ALEN); | |
205 | macvlan_hash_add(vlan); | |
206 | } | |
207 | ||
d94d0254 GF |
208 | static bool macvlan_addr_busy(const struct macvlan_port *port, |
209 | const unsigned char *addr) | |
f9ac30f0 | 210 | { |
18c8c54d | 211 | /* Test to see if the specified address is |
f9ac30f0 EB |
212 | * currently in use by the underlying device or |
213 | * another macvlan. | |
214 | */ | |
18c8c54d | 215 | if (!macvlan_passthru(port) && !macvlan_addr_change(port) && |
e696cda7 | 216 | ether_addr_equal_64bits(port->dev->dev_addr, addr)) |
d94d0254 | 217 | return true; |
f9ac30f0 EB |
218 | |
219 | if (macvlan_hash_lookup(port, addr)) | |
d94d0254 | 220 | return true; |
f9ac30f0 | 221 | |
d94d0254 | 222 | return false; |
f9ac30f0 EB |
223 | } |
224 | ||
a1e514c5 | 225 | |
fc0663d6 AB |
226 | static int macvlan_broadcast_one(struct sk_buff *skb, |
227 | const struct macvlan_dev *vlan, | |
618e1b74 | 228 | const struct ethhdr *eth, bool local) |
a1e514c5 | 229 | { |
fc0663d6 | 230 | struct net_device *dev = vlan->dev; |
a1e514c5 | 231 | |
618e1b74 | 232 | if (local) |
412ca155 | 233 | return __dev_forward_skb(dev, skb); |
618e1b74 | 234 | |
a1e514c5 | 235 | skb->dev = dev; |
a6700db1 | 236 | if (ether_addr_equal_64bits(eth->h_dest, dev->broadcast)) |
a1e514c5 AB |
237 | skb->pkt_type = PACKET_BROADCAST; |
238 | else | |
239 | skb->pkt_type = PACKET_MULTICAST; | |
240 | ||
412ca155 | 241 | return 0; |
a1e514c5 AB |
242 | } |
243 | ||
3807ff58 ED |
244 | static u32 macvlan_hash_mix(const struct macvlan_dev *vlan) |
245 | { | |
246 | return (u32)(((unsigned long)vlan) >> L1_CACHE_SHIFT); | |
247 | } | |
248 | ||
249 | ||
250 | static unsigned int mc_hash(const struct macvlan_dev *vlan, | |
251 | const unsigned char *addr) | |
cd431e73 ED |
252 | { |
253 | u32 val = __get_unaligned_cpu32(addr + 2); | |
254 | ||
3807ff58 | 255 | val ^= macvlan_hash_mix(vlan); |
cd431e73 ED |
256 | return hash_32(val, MACVLAN_MC_FILTER_BITS); |
257 | } | |
258 | ||
b863ceb7 | 259 | static void macvlan_broadcast(struct sk_buff *skb, |
618e1b74 AB |
260 | const struct macvlan_port *port, |
261 | struct net_device *src, | |
262 | enum macvlan_mode mode) | |
b863ceb7 PM |
263 | { |
264 | const struct ethhdr *eth = eth_hdr(skb); | |
265 | const struct macvlan_dev *vlan; | |
b863ceb7 PM |
266 | struct sk_buff *nskb; |
267 | unsigned int i; | |
a1e514c5 | 268 | int err; |
3807ff58 | 269 | unsigned int hash; |
b863ceb7 | 270 | |
efbbced3 PM |
271 | if (skb->protocol == htons(ETH_P_PAUSE)) |
272 | return; | |
273 | ||
b863ceb7 | 274 | for (i = 0; i < MACVLAN_HASH_SIZE; i++) { |
b67bfe0d | 275 | hlist_for_each_entry_rcu(vlan, &port->vlan_hash[i], hlist) { |
618e1b74 AB |
276 | if (vlan->dev == src || !(vlan->mode & mode)) |
277 | continue; | |
278 | ||
3807ff58 | 279 | hash = mc_hash(vlan, eth->h_dest); |
cd431e73 ED |
280 | if (!test_bit(hash, vlan->mc_filter)) |
281 | continue; | |
de9e8f3f HX |
282 | |
283 | err = NET_RX_DROP; | |
b863ceb7 | 284 | nskb = skb_clone(skb, GFP_ATOMIC); |
de9e8f3f HX |
285 | if (likely(nskb)) |
286 | err = macvlan_broadcast_one( | |
287 | nskb, vlan, eth, | |
412ca155 HX |
288 | mode == MACVLAN_MODE_BRIDGE) ?: |
289 | netif_rx_ni(nskb); | |
a1e514c5 | 290 | macvlan_count_rx(vlan, skb->len + ETH_HLEN, |
4c979935 | 291 | err == NET_RX_SUCCESS, true); |
b863ceb7 PM |
292 | } |
293 | } | |
294 | } | |
295 | ||
412ca155 | 296 | static void macvlan_process_broadcast(struct work_struct *w) |
b863ceb7 | 297 | { |
412ca155 HX |
298 | struct macvlan_port *port = container_of(w, struct macvlan_port, |
299 | bc_work); | |
300 | struct sk_buff *skb; | |
301 | struct sk_buff_head list; | |
302 | ||
fe0ca732 | 303 | __skb_queue_head_init(&list); |
412ca155 HX |
304 | |
305 | spin_lock_bh(&port->bc_queue.lock); | |
306 | skb_queue_splice_tail_init(&port->bc_queue, &list); | |
307 | spin_unlock_bh(&port->bc_queue.lock); | |
308 | ||
309 | while ((skb = __skb_dequeue(&list))) { | |
310 | const struct macvlan_dev *src = MACVLAN_SKB_CB(skb)->src; | |
311 | ||
312 | rcu_read_lock(); | |
b863ceb7 | 313 | |
618e1b74 AB |
314 | if (!src) |
315 | /* frame comes from an external address */ | |
316 | macvlan_broadcast(skb, port, NULL, | |
317 | MACVLAN_MODE_PRIVATE | | |
318 | MACVLAN_MODE_VEPA | | |
eb06acdc | 319 | MACVLAN_MODE_PASSTHRU| |
618e1b74 AB |
320 | MACVLAN_MODE_BRIDGE); |
321 | else if (src->mode == MACVLAN_MODE_VEPA) | |
322 | /* flood to everyone except source */ | |
323 | macvlan_broadcast(skb, port, src->dev, | |
324 | MACVLAN_MODE_VEPA | | |
325 | MACVLAN_MODE_BRIDGE); | |
412ca155 | 326 | else |
618e1b74 AB |
327 | /* |
328 | * flood only to VEPA ports, bridge ports | |
329 | * already saw the frame on the way out. | |
330 | */ | |
331 | macvlan_broadcast(skb, port, src->dev, | |
332 | MACVLAN_MODE_VEPA); | |
412ca155 HX |
333 | |
334 | rcu_read_unlock(); | |
335 | ||
260916df HX |
336 | if (src) |
337 | dev_put(src->dev); | |
bf97403a | 338 | consume_skb(skb); |
412ca155 HX |
339 | } |
340 | } | |
341 | ||
342 | static void macvlan_broadcast_enqueue(struct macvlan_port *port, | |
260916df | 343 | const struct macvlan_dev *src, |
412ca155 HX |
344 | struct sk_buff *skb) |
345 | { | |
e676f197 | 346 | struct sk_buff *nskb; |
412ca155 HX |
347 | int err = -ENOMEM; |
348 | ||
e676f197 HX |
349 | nskb = skb_clone(skb, GFP_ATOMIC); |
350 | if (!nskb) | |
412ca155 HX |
351 | goto err; |
352 | ||
260916df HX |
353 | MACVLAN_SKB_CB(nskb)->src = src; |
354 | ||
412ca155 | 355 | spin_lock(&port->bc_queue.lock); |
07d92d5c | 356 | if (skb_queue_len(&port->bc_queue) < MACVLAN_BC_QUEUE_LEN) { |
260916df HX |
357 | if (src) |
358 | dev_hold(src->dev); | |
e676f197 | 359 | __skb_queue_tail(&port->bc_queue, nskb); |
412ca155 HX |
360 | err = 0; |
361 | } | |
362 | spin_unlock(&port->bc_queue.lock); | |
363 | ||
364 | if (err) | |
e676f197 | 365 | goto free_nskb; |
412ca155 HX |
366 | |
367 | schedule_work(&port->bc_work); | |
368 | return; | |
369 | ||
e676f197 HX |
370 | free_nskb: |
371 | kfree_skb(nskb); | |
412ca155 HX |
372 | err: |
373 | atomic_long_inc(&skb->dev->rx_dropped); | |
374 | } | |
375 | ||
79cf79ab MB |
376 | static void macvlan_flush_sources(struct macvlan_port *port, |
377 | struct macvlan_dev *vlan) | |
378 | { | |
379 | int i; | |
380 | ||
381 | for (i = 0; i < MACVLAN_HASH_SIZE; i++) { | |
382 | struct hlist_node *h, *n; | |
383 | ||
384 | hlist_for_each_safe(h, n, &port->vlan_source_hash[i]) { | |
385 | struct macvlan_source_entry *entry; | |
386 | ||
387 | entry = hlist_entry(h, struct macvlan_source_entry, | |
388 | hlist); | |
389 | if (entry->vlan == vlan) | |
390 | macvlan_hash_del_source(entry); | |
391 | } | |
392 | } | |
393 | vlan->macaddr_count = 0; | |
394 | } | |
395 | ||
396 | static void macvlan_forward_source_one(struct sk_buff *skb, | |
397 | struct macvlan_dev *vlan) | |
398 | { | |
399 | struct sk_buff *nskb; | |
400 | struct net_device *dev; | |
401 | int len; | |
402 | int ret; | |
403 | ||
404 | dev = vlan->dev; | |
405 | if (unlikely(!(dev->flags & IFF_UP))) | |
406 | return; | |
407 | ||
408 | nskb = skb_clone(skb, GFP_ATOMIC); | |
409 | if (!nskb) | |
410 | return; | |
411 | ||
412 | len = nskb->len + ETH_HLEN; | |
413 | nskb->dev = dev; | |
c8c41ea1 AD |
414 | |
415 | if (ether_addr_equal_64bits(eth_hdr(skb)->h_dest, dev->dev_addr)) | |
416 | nskb->pkt_type = PACKET_HOST; | |
79cf79ab MB |
417 | |
418 | ret = netif_rx(nskb); | |
4c979935 | 419 | macvlan_count_rx(vlan, len, ret == NET_RX_SUCCESS, false); |
79cf79ab MB |
420 | } |
421 | ||
422 | static void macvlan_forward_source(struct sk_buff *skb, | |
423 | struct macvlan_port *port, | |
424 | const unsigned char *addr) | |
425 | { | |
426 | struct macvlan_source_entry *entry; | |
427 | u32 idx = macvlan_eth_hash(addr); | |
428 | struct hlist_head *h = &port->vlan_source_hash[idx]; | |
429 | ||
430 | hlist_for_each_entry_rcu(entry, h, hlist) { | |
431 | if (ether_addr_equal_64bits(entry->addr, addr)) | |
fc51f2b7 | 432 | macvlan_forward_source_one(skb, entry->vlan); |
79cf79ab MB |
433 | } |
434 | } | |
435 | ||
412ca155 HX |
436 | /* called under rcu_read_lock() from netif_receive_skb */ |
437 | static rx_handler_result_t macvlan_handle_frame(struct sk_buff **pskb) | |
438 | { | |
439 | struct macvlan_port *port; | |
440 | struct sk_buff *skb = *pskb; | |
441 | const struct ethhdr *eth = eth_hdr(skb); | |
442 | const struct macvlan_dev *vlan; | |
443 | const struct macvlan_dev *src; | |
444 | struct net_device *dev; | |
445 | unsigned int len = 0; | |
d1dd9119 | 446 | int ret; |
447 | rx_handler_result_t handle_res; | |
412ca155 HX |
448 | |
449 | port = macvlan_port_get_rcu(skb->dev); | |
450 | if (is_multicast_ether_addr(eth->h_dest)) { | |
9c127a01 HX |
451 | unsigned int hash; |
452 | ||
19bcf9f2 | 453 | skb = ip_check_defrag(dev_net(skb->dev), skb, IP_DEFRAG_MACVLAN); |
412ca155 HX |
454 | if (!skb) |
455 | return RX_HANDLER_CONSUMED; | |
e639b8d8 | 456 | *pskb = skb; |
412ca155 | 457 | eth = eth_hdr(skb); |
79cf79ab | 458 | macvlan_forward_source(skb, port, eth->h_source); |
412ca155 HX |
459 | src = macvlan_hash_lookup(port, eth->h_source); |
460 | if (src && src->mode != MACVLAN_MODE_VEPA && | |
461 | src->mode != MACVLAN_MODE_BRIDGE) { | |
729e72a1 | 462 | /* forward to original port. */ |
463 | vlan = src; | |
412ca155 HX |
464 | ret = macvlan_broadcast_one(skb, vlan, eth, 0) ?: |
465 | netif_rx(skb); | |
d1dd9119 | 466 | handle_res = RX_HANDLER_CONSUMED; |
729e72a1 | 467 | goto out; |
468 | } | |
469 | ||
9c127a01 HX |
470 | hash = mc_hash(NULL, eth->h_dest); |
471 | if (test_bit(hash, port->mc_filter)) | |
472 | macvlan_broadcast_enqueue(port, src, skb); | |
412ca155 | 473 | |
8a4eb573 | 474 | return RX_HANDLER_PASS; |
b863ceb7 PM |
475 | } |
476 | ||
79cf79ab | 477 | macvlan_forward_source(skb, port, eth->h_source); |
43c2d578 | 478 | if (macvlan_passthru(port)) |
233c7df0 JP |
479 | vlan = list_first_or_null_rcu(&port->vlans, |
480 | struct macvlan_dev, list); | |
eb06acdc SS |
481 | else |
482 | vlan = macvlan_hash_lookup(port, eth->h_dest); | |
dd6b9c2c | 483 | if (!vlan || vlan->mode == MACVLAN_MODE_SOURCE) |
8a4eb573 | 484 | return RX_HANDLER_PASS; |
b863ceb7 PM |
485 | |
486 | dev = vlan->dev; | |
487 | if (unlikely(!(dev->flags & IFF_UP))) { | |
488 | kfree_skb(skb); | |
8a4eb573 | 489 | return RX_HANDLER_CONSUMED; |
b863ceb7 | 490 | } |
a1e514c5 | 491 | len = skb->len + ETH_HLEN; |
b863ceb7 | 492 | skb = skb_share_check(skb, GFP_ATOMIC); |
d1dd9119 | 493 | if (!skb) { |
494 | ret = NET_RX_DROP; | |
495 | handle_res = RX_HANDLER_CONSUMED; | |
ba01877f | 496 | goto out; |
d1dd9119 | 497 | } |
b863ceb7 | 498 | |
e639b8d8 | 499 | *pskb = skb; |
b863ceb7 PM |
500 | skb->dev = dev; |
501 | skb->pkt_type = PACKET_HOST; | |
502 | ||
d1dd9119 | 503 | ret = NET_RX_SUCCESS; |
504 | handle_res = RX_HANDLER_ANOTHER; | |
ba01877f | 505 | out: |
4c979935 | 506 | macvlan_count_rx(vlan, len, ret == NET_RX_SUCCESS, false); |
d1dd9119 | 507 | return handle_res; |
b863ceb7 PM |
508 | } |
509 | ||
618e1b74 AB |
510 | static int macvlan_queue_xmit(struct sk_buff *skb, struct net_device *dev) |
511 | { | |
512 | const struct macvlan_dev *vlan = netdev_priv(dev); | |
513 | const struct macvlan_port *port = vlan->port; | |
514 | const struct macvlan_dev *dest; | |
515 | ||
516 | if (vlan->mode == MACVLAN_MODE_BRIDGE) { | |
517 | const struct ethhdr *eth = (void *)skb->data; | |
518 | ||
519 | /* send to other bridge ports directly */ | |
520 | if (is_multicast_ether_addr(eth->h_dest)) { | |
521 | macvlan_broadcast(skb, port, dev, MACVLAN_MODE_BRIDGE); | |
522 | goto xmit_world; | |
523 | } | |
524 | ||
525 | dest = macvlan_hash_lookup(port, eth->h_dest); | |
526 | if (dest && dest->mode == MACVLAN_MODE_BRIDGE) { | |
a37dd333 | 527 | /* send to lowerdev first for its network taps */ |
cb2d0f3e | 528 | dev_forward_skb(vlan->lowerdev, skb); |
618e1b74 AB |
529 | |
530 | return NET_XMIT_SUCCESS; | |
531 | } | |
532 | } | |
618e1b74 | 533 | xmit_world: |
59b9997b | 534 | skb->dev = vlan->lowerdev; |
eadec877 AD |
535 | return dev_queue_xmit_accel(skb, |
536 | netdev_get_sb_channel(dev) ? dev : NULL); | |
618e1b74 AB |
537 | } |
538 | ||
688cea83 | 539 | static inline netdev_tx_t macvlan_netpoll_send_skb(struct macvlan_dev *vlan, struct sk_buff *skb) |
540 | { | |
541 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
542 | if (vlan->netpoll) | |
543 | netpoll_send_skb(vlan->netpoll, skb); | |
544 | #else | |
545 | BUG(); | |
546 | #endif | |
547 | return NETDEV_TX_OK; | |
548 | } | |
549 | ||
0db901bd | 550 | static netdev_tx_t macvlan_start_xmit(struct sk_buff *skb, |
551 | struct net_device *dev) | |
b863ceb7 | 552 | { |
81d4e91c | 553 | struct macvlan_dev *vlan = netdev_priv(dev); |
b863ceb7 PM |
554 | unsigned int len = skb->len; |
555 | int ret; | |
688cea83 | 556 | |
557 | if (unlikely(netpoll_tx_running(dev))) | |
558 | return macvlan_netpoll_send_skb(vlan, skb); | |
b863ceb7 | 559 | |
81d4e91c | 560 | ret = macvlan_queue_xmit(skb, dev); |
a6cc0cfa | 561 | |
2d6c9ffc | 562 | if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) { |
cdf3e274 | 563 | struct vlan_pcpu_stats *pcpu_stats; |
2c114553 | 564 | |
8ffab51b ED |
565 | pcpu_stats = this_cpu_ptr(vlan->pcpu_stats); |
566 | u64_stats_update_begin(&pcpu_stats->syncp); | |
567 | pcpu_stats->tx_packets++; | |
568 | pcpu_stats->tx_bytes += len; | |
569 | u64_stats_update_end(&pcpu_stats->syncp); | |
570 | } else { | |
571 | this_cpu_inc(vlan->pcpu_stats->tx_dropped); | |
572 | } | |
cbbef5e1 | 573 | return ret; |
b863ceb7 PM |
574 | } |
575 | ||
576 | static int macvlan_hard_header(struct sk_buff *skb, struct net_device *dev, | |
3b04ddde SH |
577 | unsigned short type, const void *daddr, |
578 | const void *saddr, unsigned len) | |
b863ceb7 PM |
579 | { |
580 | const struct macvlan_dev *vlan = netdev_priv(dev); | |
581 | struct net_device *lowerdev = vlan->lowerdev; | |
582 | ||
0c4e8581 SH |
583 | return dev_hard_header(skb, lowerdev, type, daddr, |
584 | saddr ? : dev->dev_addr, len); | |
b863ceb7 PM |
585 | } |
586 | ||
3b04ddde SH |
587 | static const struct header_ops macvlan_hard_header_ops = { |
588 | .create = macvlan_hard_header, | |
3b04ddde | 589 | .parse = eth_header_parse, |
3b04ddde SH |
590 | .cache = eth_header_cache, |
591 | .cache_update = eth_header_cache_update, | |
592 | }; | |
593 | ||
b863ceb7 PM |
594 | static int macvlan_open(struct net_device *dev) |
595 | { | |
596 | struct macvlan_dev *vlan = netdev_priv(dev); | |
b863ceb7 PM |
597 | struct net_device *lowerdev = vlan->lowerdev; |
598 | int err; | |
599 | ||
43c2d578 | 600 | if (macvlan_passthru(vlan->port)) { |
78738141 MT |
601 | if (!(vlan->flags & MACVLAN_FLAG_NOPROMISC)) { |
602 | err = dev_set_promiscuity(lowerdev, 1); | |
603 | if (err < 0) | |
604 | goto out; | |
605 | } | |
eb06acdc SS |
606 | goto hash_add; |
607 | } | |
608 | ||
59f997b0 | 609 | err = -EADDRINUSE; |
7d775f63 AD |
610 | if (macvlan_addr_busy(vlan->port, dev->dev_addr)) |
611 | goto out; | |
612 | ||
613 | /* Attempt to populate accel_priv which is used to offload the L2 | |
614 | * forwarding requests for unicast packets. | |
615 | */ | |
81d4e91c | 616 | if (lowerdev->features & NETIF_F_HW_L2FW_DOFFLOAD) |
7d775f63 | 617 | vlan->accel_priv = |
a6cc0cfa JF |
618 | lowerdev->netdev_ops->ndo_dfwd_add_station(lowerdev, dev); |
619 | ||
81d4e91c AD |
620 | /* If earlier attempt to offload failed, or accel_priv is not |
621 | * populated we must add the unicast address to the lower device. | |
622 | */ | |
623 | if (IS_ERR_OR_NULL(vlan->accel_priv)) { | |
624 | vlan->accel_priv = NULL; | |
625 | err = dev_uc_add(lowerdev, dev->dev_addr); | |
626 | if (err < 0) | |
627 | goto out; | |
a6cc0cfa JF |
628 | } |
629 | ||
b89fb7da WC |
630 | if (dev->flags & IFF_ALLMULTI) { |
631 | err = dev_set_allmulti(lowerdev, 1); | |
632 | if (err < 0) | |
633 | goto del_unicast; | |
634 | } | |
eb06acdc | 635 | |
efdbd2b3 VY |
636 | if (dev->flags & IFF_PROMISC) { |
637 | err = dev_set_promiscuity(lowerdev, 1); | |
638 | if (err < 0) | |
639 | goto clear_multi; | |
640 | } | |
641 | ||
eb06acdc | 642 | hash_add: |
f9ac30f0 | 643 | macvlan_hash_add(vlan); |
b863ceb7 | 644 | return 0; |
b89fb7da | 645 | |
efdbd2b3 | 646 | clear_multi: |
c3891fa2 GF |
647 | if (dev->flags & IFF_ALLMULTI) |
648 | dev_set_allmulti(lowerdev, -1); | |
b89fb7da | 649 | del_unicast: |
7d775f63 | 650 | if (vlan->accel_priv) { |
a6cc0cfa | 651 | lowerdev->netdev_ops->ndo_dfwd_del_station(lowerdev, |
7d775f63 AD |
652 | vlan->accel_priv); |
653 | vlan->accel_priv = NULL; | |
81d4e91c AD |
654 | } else { |
655 | dev_uc_del(lowerdev, dev->dev_addr); | |
a6cc0cfa | 656 | } |
81d4e91c | 657 | out: |
b89fb7da | 658 | return err; |
b863ceb7 PM |
659 | } |
660 | ||
661 | static int macvlan_stop(struct net_device *dev) | |
662 | { | |
663 | struct macvlan_dev *vlan = netdev_priv(dev); | |
664 | struct net_device *lowerdev = vlan->lowerdev; | |
665 | ||
7d775f63 | 666 | if (vlan->accel_priv) { |
a6cc0cfa | 667 | lowerdev->netdev_ops->ndo_dfwd_del_station(lowerdev, |
7d775f63 AD |
668 | vlan->accel_priv); |
669 | vlan->accel_priv = NULL; | |
a6cc0cfa JF |
670 | } |
671 | ||
df8ef8f3 JF |
672 | dev_uc_unsync(lowerdev, dev); |
673 | dev_mc_unsync(lowerdev, dev); | |
674 | ||
43c2d578 | 675 | if (macvlan_passthru(vlan->port)) { |
df8ef8f3 JF |
676 | if (!(vlan->flags & MACVLAN_FLAG_NOPROMISC)) |
677 | dev_set_promiscuity(lowerdev, -1); | |
eb06acdc SS |
678 | goto hash_del; |
679 | } | |
680 | ||
b863ceb7 PM |
681 | if (dev->flags & IFF_ALLMULTI) |
682 | dev_set_allmulti(lowerdev, -1); | |
683 | ||
efdbd2b3 VY |
684 | if (dev->flags & IFF_PROMISC) |
685 | dev_set_promiscuity(lowerdev, -1); | |
686 | ||
a748ee24 | 687 | dev_uc_del(lowerdev, dev->dev_addr); |
b863ceb7 | 688 | |
eb06acdc | 689 | hash_del: |
449f4544 | 690 | macvlan_hash_del(vlan, !dev->dismantle); |
b863ceb7 PM |
691 | return 0; |
692 | } | |
693 | ||
e289fd28 | 694 | static int macvlan_sync_address(struct net_device *dev, unsigned char *addr) |
ad5d20a6 PM |
695 | { |
696 | struct macvlan_dev *vlan = netdev_priv(dev); | |
697 | struct net_device *lowerdev = vlan->lowerdev; | |
18c8c54d | 698 | struct macvlan_port *port = vlan->port; |
ad5d20a6 PM |
699 | int err; |
700 | ||
f9ac30f0 EB |
701 | if (!(dev->flags & IFF_UP)) { |
702 | /* Just copy in the new address */ | |
e289fd28 | 703 | ether_addr_copy(dev->dev_addr, addr); |
f9ac30f0 EB |
704 | } else { |
705 | /* Rehash and update the device filters */ | |
e289fd28 | 706 | if (macvlan_addr_busy(vlan->port, addr)) |
59f997b0 | 707 | return -EADDRINUSE; |
ad5d20a6 | 708 | |
18c8c54d | 709 | if (!macvlan_passthru(port)) { |
e289fd28 | 710 | err = dev_uc_add(lowerdev, addr); |
711 | if (err) | |
712 | return err; | |
ad5d20a6 | 713 | |
e289fd28 | 714 | dev_uc_del(lowerdev, dev->dev_addr); |
715 | } | |
f9ac30f0 | 716 | |
e289fd28 | 717 | macvlan_hash_change_addr(vlan, addr); |
f9ac30f0 | 718 | } |
18c8c54d VY |
719 | if (macvlan_passthru(port) && !macvlan_addr_change(port)) { |
720 | /* Since addr_change isn't set, we are here due to lower | |
721 | * device change. Save the lower-dev address so we can | |
722 | * restore it later. | |
723 | */ | |
724 | ether_addr_copy(vlan->port->perm_addr, | |
725 | lowerdev->dev_addr); | |
726 | } | |
727 | macvlan_clear_addr_change(port); | |
ad5d20a6 PM |
728 | return 0; |
729 | } | |
730 | ||
e289fd28 | 731 | static int macvlan_set_mac_address(struct net_device *dev, void *p) |
732 | { | |
733 | struct macvlan_dev *vlan = netdev_priv(dev); | |
734 | struct sockaddr *addr = p; | |
735 | ||
736 | if (!is_valid_ether_addr(addr->sa_data)) | |
737 | return -EADDRNOTAVAIL; | |
738 | ||
e26f43fa VY |
739 | /* If the addresses are the same, this is a no-op */ |
740 | if (ether_addr_equal(dev->dev_addr, addr->sa_data)) | |
741 | return 0; | |
742 | ||
e289fd28 | 743 | if (vlan->mode == MACVLAN_MODE_PASSTHRU) { |
18c8c54d | 744 | macvlan_set_addr_change(vlan->port); |
3a37a963 | 745 | return dev_set_mac_address(vlan->lowerdev, addr, NULL); |
e289fd28 | 746 | } |
747 | ||
59f997b0 MC |
748 | if (macvlan_addr_busy(vlan->port, addr->sa_data)) |
749 | return -EADDRINUSE; | |
750 | ||
e289fd28 | 751 | return macvlan_sync_address(dev, addr->sa_data); |
752 | } | |
753 | ||
b863ceb7 PM |
754 | static void macvlan_change_rx_flags(struct net_device *dev, int change) |
755 | { | |
756 | struct macvlan_dev *vlan = netdev_priv(dev); | |
757 | struct net_device *lowerdev = vlan->lowerdev; | |
758 | ||
bbeb0ead PC |
759 | if (dev->flags & IFF_UP) { |
760 | if (change & IFF_ALLMULTI) | |
761 | dev_set_allmulti(lowerdev, dev->flags & IFF_ALLMULTI ? 1 : -1); | |
efdbd2b3 VY |
762 | if (change & IFF_PROMISC) |
763 | dev_set_promiscuity(lowerdev, | |
764 | dev->flags & IFF_PROMISC ? 1 : -1); | |
765 | ||
bbeb0ead | 766 | } |
b863ceb7 PM |
767 | } |
768 | ||
9c127a01 HX |
769 | static void macvlan_compute_filter(unsigned long *mc_filter, |
770 | struct net_device *dev, | |
771 | struct macvlan_dev *vlan) | |
b863ceb7 | 772 | { |
cd431e73 | 773 | if (dev->flags & (IFF_PROMISC | IFF_ALLMULTI)) { |
9c127a01 | 774 | bitmap_fill(mc_filter, MACVLAN_MC_FILTER_SZ); |
cd431e73 ED |
775 | } else { |
776 | struct netdev_hw_addr *ha; | |
777 | DECLARE_BITMAP(filter, MACVLAN_MC_FILTER_SZ); | |
778 | ||
779 | bitmap_zero(filter, MACVLAN_MC_FILTER_SZ); | |
780 | netdev_for_each_mc_addr(ha, dev) { | |
3807ff58 | 781 | __set_bit(mc_hash(vlan, ha->addr), filter); |
cd431e73 | 782 | } |
d5270430 | 783 | |
3807ff58 | 784 | __set_bit(mc_hash(vlan, dev->broadcast), filter); |
d5270430 | 785 | |
9c127a01 | 786 | bitmap_copy(mc_filter, filter, MACVLAN_MC_FILTER_SZ); |
cd431e73 | 787 | } |
9c127a01 HX |
788 | } |
789 | ||
790 | static void macvlan_set_mac_lists(struct net_device *dev) | |
791 | { | |
792 | struct macvlan_dev *vlan = netdev_priv(dev); | |
793 | ||
794 | macvlan_compute_filter(vlan->mc_filter, dev, vlan); | |
795 | ||
df8ef8f3 | 796 | dev_uc_sync(vlan->lowerdev, dev); |
b863ceb7 | 797 | dev_mc_sync(vlan->lowerdev, dev); |
9c127a01 HX |
798 | |
799 | /* This is slightly inaccurate as we're including the subscription | |
800 | * list of vlan->lowerdev too. | |
801 | * | |
802 | * Bug alert: This only works if everyone has the same broadcast | |
803 | * address as lowerdev. As soon as someone changes theirs this | |
804 | * will break. | |
805 | * | |
806 | * However, this is already broken as when you change your broadcast | |
807 | * address we don't get called. | |
808 | * | |
809 | * The solution is to maintain a list of broadcast addresses like | |
810 | * we do for uc/mc, if you care. | |
811 | */ | |
812 | macvlan_compute_filter(vlan->port->mc_filter, vlan->lowerdev, NULL); | |
b863ceb7 PM |
813 | } |
814 | ||
815 | static int macvlan_change_mtu(struct net_device *dev, int new_mtu) | |
816 | { | |
817 | struct macvlan_dev *vlan = netdev_priv(dev); | |
818 | ||
91572088 | 819 | if (vlan->lowerdev->mtu < new_mtu) |
b863ceb7 PM |
820 | return -EINVAL; |
821 | dev->mtu = new_mtu; | |
822 | return 0; | |
823 | } | |
824 | ||
825 | /* | |
826 | * macvlan network devices have devices nesting below it and are a special | |
827 | * "super class" of normal network devices; split their locks off into a | |
828 | * separate class since they always nest. | |
829 | */ | |
cf508b12 | 830 | static struct lock_class_key macvlan_netdev_addr_lock_key; |
b863ceb7 | 831 | |
70957eae VY |
832 | #define ALWAYS_ON_OFFLOADS \ |
833 | (NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_GSO_SOFTWARE | \ | |
f21e5077 | 834 | NETIF_F_GSO_ROBUST | NETIF_F_GSO_ENCAP_ALL) |
8b4703e9 | 835 | |
70957eae VY |
836 | #define ALWAYS_ON_FEATURES (ALWAYS_ON_OFFLOADS | NETIF_F_LLTX) |
837 | ||
b863ceb7 | 838 | #define MACVLAN_FEATURES \ |
a188222b | 839 | (NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST | \ |
fb652fdf | 840 | NETIF_F_GSO | NETIF_F_TSO | NETIF_F_LRO | \ |
8d13e670 | 841 | NETIF_F_TSO_ECN | NETIF_F_TSO6 | NETIF_F_GRO | NETIF_F_RXCSUM | \ |
28d2b136 | 842 | NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_HW_VLAN_STAG_FILTER) |
b863ceb7 PM |
843 | |
844 | #define MACVLAN_STATE_MASK \ | |
845 | ((1<<__LINK_STATE_NOCARRIER) | (1<<__LINK_STATE_DORMANT)) | |
846 | ||
c674ac30 VY |
847 | static int macvlan_get_nest_level(struct net_device *dev) |
848 | { | |
849 | return ((struct macvlan_dev *)netdev_priv(dev))->nest_level; | |
850 | } | |
851 | ||
c773e847 DM |
852 | static void macvlan_set_lockdep_class(struct net_device *dev) |
853 | { | |
24ffd752 | 854 | netdev_lockdep_set_classes(dev); |
c674ac30 VY |
855 | lockdep_set_class_and_subclass(&dev->addr_list_lock, |
856 | &macvlan_netdev_addr_lock_key, | |
857 | macvlan_get_nest_level(dev)); | |
c773e847 DM |
858 | } |
859 | ||
b863ceb7 PM |
860 | static int macvlan_init(struct net_device *dev) |
861 | { | |
862 | struct macvlan_dev *vlan = netdev_priv(dev); | |
863 | const struct net_device *lowerdev = vlan->lowerdev; | |
30837960 | 864 | struct macvlan_port *port = vlan->port; |
b863ceb7 PM |
865 | |
866 | dev->state = (dev->state & ~MACVLAN_STATE_MASK) | | |
867 | (lowerdev->state & MACVLAN_STATE_MASK); | |
868 | dev->features = lowerdev->features & MACVLAN_FEATURES; | |
8b4703e9 | 869 | dev->features |= ALWAYS_ON_FEATURES; |
62dbe830 | 870 | dev->hw_features |= NETIF_F_LRO; |
081e83a7 | 871 | dev->vlan_features = lowerdev->vlan_features & MACVLAN_FEATURES; |
70957eae | 872 | dev->vlan_features |= ALWAYS_ON_OFFLOADS; |
f21e5077 | 873 | dev->hw_enc_features |= dev->features; |
8c2acc53 | 874 | dev->gso_max_size = lowerdev->gso_max_size; |
f6773c5e | 875 | dev->gso_max_segs = lowerdev->gso_max_segs; |
ef5c8996 | 876 | dev->hard_header_len = lowerdev->hard_header_len; |
b863ceb7 | 877 | |
c773e847 DM |
878 | macvlan_set_lockdep_class(dev); |
879 | ||
1c213bd2 | 880 | vlan->pcpu_stats = netdev_alloc_pcpu_stats(struct vlan_pcpu_stats); |
8ffab51b | 881 | if (!vlan->pcpu_stats) |
fccaf710 ED |
882 | return -ENOMEM; |
883 | ||
30837960 FR |
884 | port->count += 1; |
885 | ||
b863ceb7 PM |
886 | return 0; |
887 | } | |
888 | ||
fccaf710 ED |
889 | static void macvlan_uninit(struct net_device *dev) |
890 | { | |
891 | struct macvlan_dev *vlan = netdev_priv(dev); | |
d5cd9244 | 892 | struct macvlan_port *port = vlan->port; |
fccaf710 | 893 | |
8ffab51b | 894 | free_percpu(vlan->pcpu_stats); |
d5cd9244 | 895 | |
79cf79ab | 896 | macvlan_flush_sources(port, vlan); |
5e3c516b DM |
897 | port->count -= 1; |
898 | if (!port->count) | |
d5cd9244 | 899 | macvlan_port_destroy(port->dev); |
fccaf710 ED |
900 | } |
901 | ||
bc1f4470 | 902 | static void macvlan_dev_get_stats64(struct net_device *dev, |
903 | struct rtnl_link_stats64 *stats) | |
fccaf710 | 904 | { |
fccaf710 ED |
905 | struct macvlan_dev *vlan = netdev_priv(dev); |
906 | ||
8ffab51b | 907 | if (vlan->pcpu_stats) { |
cdf3e274 | 908 | struct vlan_pcpu_stats *p; |
8ffab51b ED |
909 | u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes; |
910 | u32 rx_errors = 0, tx_dropped = 0; | |
bc66154e | 911 | unsigned int start; |
fccaf710 ED |
912 | int i; |
913 | ||
914 | for_each_possible_cpu(i) { | |
8ffab51b | 915 | p = per_cpu_ptr(vlan->pcpu_stats, i); |
bc66154e | 916 | do { |
57a7744e | 917 | start = u64_stats_fetch_begin_irq(&p->syncp); |
bc66154e ED |
918 | rx_packets = p->rx_packets; |
919 | rx_bytes = p->rx_bytes; | |
920 | rx_multicast = p->rx_multicast; | |
8ffab51b ED |
921 | tx_packets = p->tx_packets; |
922 | tx_bytes = p->tx_bytes; | |
57a7744e | 923 | } while (u64_stats_fetch_retry_irq(&p->syncp, start)); |
8ffab51b ED |
924 | |
925 | stats->rx_packets += rx_packets; | |
926 | stats->rx_bytes += rx_bytes; | |
927 | stats->multicast += rx_multicast; | |
928 | stats->tx_packets += tx_packets; | |
929 | stats->tx_bytes += tx_bytes; | |
930 | /* rx_errors & tx_dropped are u32, updated | |
931 | * without syncp protection. | |
932 | */ | |
933 | rx_errors += p->rx_errors; | |
934 | tx_dropped += p->tx_dropped; | |
fccaf710 | 935 | } |
8ffab51b ED |
936 | stats->rx_errors = rx_errors; |
937 | stats->rx_dropped = rx_errors; | |
938 | stats->tx_dropped = tx_dropped; | |
fccaf710 | 939 | } |
fccaf710 ED |
940 | } |
941 | ||
8e586137 | 942 | static int macvlan_vlan_rx_add_vid(struct net_device *dev, |
80d5c368 | 943 | __be16 proto, u16 vid) |
8d13e670 JF |
944 | { |
945 | struct macvlan_dev *vlan = netdev_priv(dev); | |
946 | struct net_device *lowerdev = vlan->lowerdev; | |
8d13e670 | 947 | |
80d5c368 | 948 | return vlan_vid_add(lowerdev, proto, vid); |
8d13e670 JF |
949 | } |
950 | ||
8e586137 | 951 | static int macvlan_vlan_rx_kill_vid(struct net_device *dev, |
80d5c368 | 952 | __be16 proto, u16 vid) |
8d13e670 JF |
953 | { |
954 | struct macvlan_dev *vlan = netdev_priv(dev); | |
955 | struct net_device *lowerdev = vlan->lowerdev; | |
8d13e670 | 956 | |
80d5c368 | 957 | vlan_vid_del(lowerdev, proto, vid); |
8e586137 | 958 | return 0; |
8d13e670 JF |
959 | } |
960 | ||
edc7d573 | 961 | static int macvlan_fdb_add(struct ndmsg *ndm, struct nlattr *tb[], |
df8ef8f3 | 962 | struct net_device *dev, |
f6f6424b | 963 | const unsigned char *addr, u16 vid, |
87b0984e PM |
964 | u16 flags, |
965 | struct netlink_ext_ack *extack) | |
df8ef8f3 JF |
966 | { |
967 | struct macvlan_dev *vlan = netdev_priv(dev); | |
968 | int err = -EINVAL; | |
969 | ||
8a50f11c VY |
970 | /* Support unicast filter only on passthru devices. |
971 | * Multicast filter should be allowed on all devices. | |
972 | */ | |
43c2d578 | 973 | if (!macvlan_passthru(vlan->port) && is_unicast_ether_addr(addr)) |
df8ef8f3 JF |
974 | return -EOPNOTSUPP; |
975 | ||
ab2cfbb2 TR |
976 | if (flags & NLM_F_REPLACE) |
977 | return -EOPNOTSUPP; | |
978 | ||
df8ef8f3 JF |
979 | if (is_unicast_ether_addr(addr)) |
980 | err = dev_uc_add_excl(dev, addr); | |
981 | else if (is_multicast_ether_addr(addr)) | |
982 | err = dev_mc_add_excl(dev, addr); | |
983 | ||
984 | return err; | |
985 | } | |
986 | ||
1690be63 | 987 | static int macvlan_fdb_del(struct ndmsg *ndm, struct nlattr *tb[], |
df8ef8f3 | 988 | struct net_device *dev, |
f6f6424b | 989 | const unsigned char *addr, u16 vid) |
df8ef8f3 JF |
990 | { |
991 | struct macvlan_dev *vlan = netdev_priv(dev); | |
992 | int err = -EINVAL; | |
993 | ||
8a50f11c VY |
994 | /* Support unicast filter only on passthru devices. |
995 | * Multicast filter should be allowed on all devices. | |
996 | */ | |
43c2d578 | 997 | if (!macvlan_passthru(vlan->port) && is_unicast_ether_addr(addr)) |
df8ef8f3 JF |
998 | return -EOPNOTSUPP; |
999 | ||
1000 | if (is_unicast_ether_addr(addr)) | |
1001 | err = dev_uc_del(dev, addr); | |
1002 | else if (is_multicast_ether_addr(addr)) | |
1003 | err = dev_mc_del(dev, addr); | |
1004 | ||
1005 | return err; | |
1006 | } | |
1007 | ||
b863ceb7 PM |
1008 | static void macvlan_ethtool_get_drvinfo(struct net_device *dev, |
1009 | struct ethtool_drvinfo *drvinfo) | |
1010 | { | |
7826d43f JP |
1011 | strlcpy(drvinfo->driver, "macvlan", sizeof(drvinfo->driver)); |
1012 | strlcpy(drvinfo->version, "0.1", sizeof(drvinfo->version)); | |
b863ceb7 PM |
1013 | } |
1014 | ||
85f95819 DD |
1015 | static int macvlan_ethtool_get_link_ksettings(struct net_device *dev, |
1016 | struct ethtool_link_ksettings *cmd) | |
9edb8bb6 SH |
1017 | { |
1018 | const struct macvlan_dev *vlan = netdev_priv(dev); | |
4bc71cb9 | 1019 | |
85f95819 | 1020 | return __ethtool_get_link_ksettings(vlan->lowerdev, cmd); |
9edb8bb6 SH |
1021 | } |
1022 | ||
2be5c767 VY |
1023 | static netdev_features_t macvlan_fix_features(struct net_device *dev, |
1024 | netdev_features_t features) | |
1025 | { | |
1026 | struct macvlan_dev *vlan = netdev_priv(dev); | |
62dbe830 | 1027 | netdev_features_t lowerdev_features = vlan->lowerdev->features; |
797f87f8 | 1028 | netdev_features_t mask; |
2be5c767 | 1029 | |
797f87f8 FW |
1030 | features |= NETIF_F_ALL_FOR_ALL; |
1031 | features &= (vlan->set_features | ~MACVLAN_FEATURES); | |
1032 | mask = features; | |
1033 | ||
62dbe830 MK |
1034 | lowerdev_features &= (features | ~NETIF_F_LRO); |
1035 | features = netdev_increment_features(lowerdev_features, features, mask); | |
8b4703e9 | 1036 | features |= ALWAYS_ON_FEATURES; |
13fbcc8d | 1037 | features &= (ALWAYS_ON_FEATURES | MACVLAN_FEATURES); |
797f87f8 FW |
1038 | |
1039 | return features; | |
2be5c767 VY |
1040 | } |
1041 | ||
688cea83 | 1042 | #ifdef CONFIG_NET_POLL_CONTROLLER |
1043 | static void macvlan_dev_poll_controller(struct net_device *dev) | |
1044 | { | |
1045 | return; | |
1046 | } | |
1047 | ||
1048 | static int macvlan_dev_netpoll_setup(struct net_device *dev, struct netpoll_info *npinfo) | |
1049 | { | |
1050 | struct macvlan_dev *vlan = netdev_priv(dev); | |
1051 | struct net_device *real_dev = vlan->lowerdev; | |
1052 | struct netpoll *netpoll; | |
1053 | int err = 0; | |
1054 | ||
1055 | netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL); | |
1056 | err = -ENOMEM; | |
1057 | if (!netpoll) | |
1058 | goto out; | |
1059 | ||
1060 | err = __netpoll_setup(netpoll, real_dev); | |
1061 | if (err) { | |
1062 | kfree(netpoll); | |
1063 | goto out; | |
1064 | } | |
1065 | ||
1066 | vlan->netpoll = netpoll; | |
1067 | ||
1068 | out: | |
1069 | return err; | |
1070 | } | |
1071 | ||
1072 | static void macvlan_dev_netpoll_cleanup(struct net_device *dev) | |
1073 | { | |
1074 | struct macvlan_dev *vlan = netdev_priv(dev); | |
1075 | struct netpoll *netpoll = vlan->netpoll; | |
1076 | ||
1077 | if (!netpoll) | |
1078 | return; | |
1079 | ||
1080 | vlan->netpoll = NULL; | |
1081 | ||
c9fbd71f | 1082 | __netpoll_free(netpoll); |
688cea83 | 1083 | } |
1084 | #endif /* CONFIG_NET_POLL_CONTROLLER */ | |
1085 | ||
ef5fa6bc ND |
1086 | static int macvlan_dev_get_iflink(const struct net_device *dev) |
1087 | { | |
1088 | struct macvlan_dev *vlan = netdev_priv(dev); | |
1089 | ||
1090 | return vlan->lowerdev->ifindex; | |
1091 | } | |
1092 | ||
b863ceb7 PM |
1093 | static const struct ethtool_ops macvlan_ethtool_ops = { |
1094 | .get_link = ethtool_op_get_link, | |
85f95819 | 1095 | .get_link_ksettings = macvlan_ethtool_get_link_ksettings, |
b863ceb7 PM |
1096 | .get_drvinfo = macvlan_ethtool_get_drvinfo, |
1097 | }; | |
1098 | ||
54a30c97 SH |
1099 | static const struct net_device_ops macvlan_netdev_ops = { |
1100 | .ndo_init = macvlan_init, | |
fccaf710 | 1101 | .ndo_uninit = macvlan_uninit, |
54a30c97 SH |
1102 | .ndo_open = macvlan_open, |
1103 | .ndo_stop = macvlan_stop, | |
00829823 | 1104 | .ndo_start_xmit = macvlan_start_xmit, |
54a30c97 | 1105 | .ndo_change_mtu = macvlan_change_mtu, |
2be5c767 | 1106 | .ndo_fix_features = macvlan_fix_features, |
54a30c97 SH |
1107 | .ndo_change_rx_flags = macvlan_change_rx_flags, |
1108 | .ndo_set_mac_address = macvlan_set_mac_address, | |
df8ef8f3 | 1109 | .ndo_set_rx_mode = macvlan_set_mac_lists, |
bc66154e | 1110 | .ndo_get_stats64 = macvlan_dev_get_stats64, |
54a30c97 | 1111 | .ndo_validate_addr = eth_validate_addr, |
8d13e670 JF |
1112 | .ndo_vlan_rx_add_vid = macvlan_vlan_rx_add_vid, |
1113 | .ndo_vlan_rx_kill_vid = macvlan_vlan_rx_kill_vid, | |
df8ef8f3 JF |
1114 | .ndo_fdb_add = macvlan_fdb_add, |
1115 | .ndo_fdb_del = macvlan_fdb_del, | |
1116 | .ndo_fdb_dump = ndo_dflt_fdb_dump, | |
c674ac30 | 1117 | .ndo_get_lock_subclass = macvlan_get_nest_level, |
688cea83 | 1118 | #ifdef CONFIG_NET_POLL_CONTROLLER |
1119 | .ndo_poll_controller = macvlan_dev_poll_controller, | |
1120 | .ndo_netpoll_setup = macvlan_dev_netpoll_setup, | |
1121 | .ndo_netpoll_cleanup = macvlan_dev_netpoll_cleanup, | |
1122 | #endif | |
ef5fa6bc | 1123 | .ndo_get_iflink = macvlan_dev_get_iflink, |
f56e67b5 | 1124 | .ndo_features_check = passthru_features_check, |
2e8b4ba6 | 1125 | .ndo_change_proto_down = dev_change_proto_down_generic, |
54a30c97 SH |
1126 | }; |
1127 | ||
8a35747a | 1128 | void macvlan_common_setup(struct net_device *dev) |
b863ceb7 PM |
1129 | { |
1130 | ether_setup(dev); | |
1131 | ||
91572088 JW |
1132 | dev->min_mtu = 0; |
1133 | dev->max_mtu = ETH_MAX_MTU; | |
02875878 ED |
1134 | dev->priv_flags &= ~IFF_TX_SKB_SHARING; |
1135 | netif_keep_dst(dev); | |
87ab7f6f | 1136 | dev->priv_flags |= IFF_UNICAST_FLT; |
54a30c97 | 1137 | dev->netdev_ops = &macvlan_netdev_ops; |
cf124db5 | 1138 | dev->needs_free_netdev = true; |
71740129 | 1139 | dev->header_ops = &macvlan_hard_header_ops; |
b863ceb7 | 1140 | dev->ethtool_ops = &macvlan_ethtool_ops; |
8a35747a HX |
1141 | } |
1142 | EXPORT_SYMBOL_GPL(macvlan_common_setup); | |
1143 | ||
1144 | static void macvlan_setup(struct net_device *dev) | |
1145 | { | |
1146 | macvlan_common_setup(dev); | |
7009212b | 1147 | dev->priv_flags |= IFF_NO_QUEUE; |
b863ceb7 PM |
1148 | } |
1149 | ||
1150 | static int macvlan_port_create(struct net_device *dev) | |
1151 | { | |
1152 | struct macvlan_port *port; | |
1153 | unsigned int i; | |
ab95bfe0 | 1154 | int err; |
b863ceb7 PM |
1155 | |
1156 | if (dev->type != ARPHRD_ETHER || dev->flags & IFF_LOOPBACK) | |
1157 | return -EINVAL; | |
1158 | ||
322dc6e0 | 1159 | if (netdev_is_rx_handler_busy(dev)) |
d6b00fec MB |
1160 | return -EBUSY; |
1161 | ||
b863ceb7 PM |
1162 | port = kzalloc(sizeof(*port), GFP_KERNEL); |
1163 | if (port == NULL) | |
1164 | return -ENOMEM; | |
1165 | ||
1166 | port->dev = dev; | |
18c8c54d | 1167 | ether_addr_copy(port->perm_addr, dev->dev_addr); |
b863ceb7 PM |
1168 | INIT_LIST_HEAD(&port->vlans); |
1169 | for (i = 0; i < MACVLAN_HASH_SIZE; i++) | |
1170 | INIT_HLIST_HEAD(&port->vlan_hash[i]); | |
79cf79ab MB |
1171 | for (i = 0; i < MACVLAN_HASH_SIZE; i++) |
1172 | INIT_HLIST_HEAD(&port->vlan_source_hash[i]); | |
ab95bfe0 | 1173 | |
412ca155 HX |
1174 | skb_queue_head_init(&port->bc_queue); |
1175 | INIT_WORK(&port->bc_work, macvlan_process_broadcast); | |
1176 | ||
a35e2c1b JP |
1177 | err = netdev_rx_handler_register(dev, macvlan_handle_frame, port); |
1178 | if (err) | |
ab95bfe0 | 1179 | kfree(port); |
d9351561 ED |
1180 | else |
1181 | dev->priv_flags |= IFF_MACVLAN_PORT; | |
ab95bfe0 | 1182 | return err; |
b863ceb7 PM |
1183 | } |
1184 | ||
1185 | static void macvlan_port_destroy(struct net_device *dev) | |
1186 | { | |
e052f7e6 | 1187 | struct macvlan_port *port = macvlan_port_get_rtnl(dev); |
f6478218 | 1188 | struct sk_buff *skb; |
b863ceb7 | 1189 | |
a35e2c1b | 1190 | dev->priv_flags &= ~IFF_MACVLAN_PORT; |
ab95bfe0 | 1191 | netdev_rx_handler_unregister(dev); |
fe0ca732 ED |
1192 | |
1193 | /* After this point, no packet can schedule bc_work anymore, | |
1194 | * but we need to cancel it and purge left skbs if any. | |
1195 | */ | |
1196 | cancel_work_sync(&port->bc_work); | |
f6478218 HX |
1197 | |
1198 | while ((skb = __skb_dequeue(&port->bc_queue))) { | |
1199 | const struct macvlan_dev *src = MACVLAN_SKB_CB(skb)->src; | |
1200 | ||
1201 | if (src) | |
1202 | dev_put(src->dev); | |
1203 | ||
1204 | kfree_skb(skb); | |
1205 | } | |
fe0ca732 | 1206 | |
18c8c54d VY |
1207 | /* If the lower device address has been changed by passthru |
1208 | * macvlan, put it back. | |
1209 | */ | |
1210 | if (macvlan_passthru(port) && | |
1211 | !ether_addr_equal(port->dev->dev_addr, port->perm_addr)) { | |
1212 | struct sockaddr sa; | |
1213 | ||
1214 | sa.sa_family = port->dev->type; | |
1215 | memcpy(&sa.sa_data, port->perm_addr, port->dev->addr_len); | |
3a37a963 | 1216 | dev_set_mac_address(port->dev, &sa, NULL); |
18c8c54d VY |
1217 | } |
1218 | ||
a1f5315c | 1219 | kfree(port); |
b863ceb7 PM |
1220 | } |
1221 | ||
a8b8a889 MS |
1222 | static int macvlan_validate(struct nlattr *tb[], struct nlattr *data[], |
1223 | struct netlink_ext_ack *extack) | |
b863ceb7 PM |
1224 | { |
1225 | if (tb[IFLA_ADDRESS]) { | |
1226 | if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) | |
1227 | return -EINVAL; | |
1228 | if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) | |
1229 | return -EADDRNOTAVAIL; | |
1230 | } | |
27c0b1a8 | 1231 | |
07850a4f ZS |
1232 | if (!data) |
1233 | return 0; | |
1234 | ||
1235 | if (data[IFLA_MACVLAN_FLAGS] && | |
15127478 MT |
1236 | nla_get_u16(data[IFLA_MACVLAN_FLAGS]) & ~MACVLAN_FLAG_NOPROMISC) |
1237 | return -EINVAL; | |
1238 | ||
07850a4f | 1239 | if (data[IFLA_MACVLAN_MODE]) { |
27c0b1a8 AB |
1240 | switch (nla_get_u32(data[IFLA_MACVLAN_MODE])) { |
1241 | case MACVLAN_MODE_PRIVATE: | |
1242 | case MACVLAN_MODE_VEPA: | |
1243 | case MACVLAN_MODE_BRIDGE: | |
eb06acdc | 1244 | case MACVLAN_MODE_PASSTHRU: |
79cf79ab MB |
1245 | case MACVLAN_MODE_SOURCE: |
1246 | break; | |
1247 | default: | |
1248 | return -EINVAL; | |
1249 | } | |
1250 | } | |
1251 | ||
07850a4f | 1252 | if (data[IFLA_MACVLAN_MACADDR_MODE]) { |
79cf79ab MB |
1253 | switch (nla_get_u32(data[IFLA_MACVLAN_MACADDR_MODE])) { |
1254 | case MACVLAN_MACADDR_ADD: | |
1255 | case MACVLAN_MACADDR_DEL: | |
1256 | case MACVLAN_MACADDR_FLUSH: | |
1257 | case MACVLAN_MACADDR_SET: | |
27c0b1a8 AB |
1258 | break; |
1259 | default: | |
1260 | return -EINVAL; | |
1261 | } | |
1262 | } | |
79cf79ab | 1263 | |
07850a4f | 1264 | if (data[IFLA_MACVLAN_MACADDR]) { |
79cf79ab MB |
1265 | if (nla_len(data[IFLA_MACVLAN_MACADDR]) != ETH_ALEN) |
1266 | return -EINVAL; | |
1267 | ||
1268 | if (!is_valid_ether_addr(nla_data(data[IFLA_MACVLAN_MACADDR]))) | |
1269 | return -EADDRNOTAVAIL; | |
1270 | } | |
1271 | ||
07850a4f | 1272 | if (data[IFLA_MACVLAN_MACADDR_COUNT]) |
79cf79ab MB |
1273 | return -EINVAL; |
1274 | ||
1275 | return 0; | |
1276 | } | |
1277 | ||
1278 | /** | |
1279 | * reconfigure list of remote source mac address | |
1280 | * (only for macvlan devices in source mode) | |
1281 | * Note regarding alignment: all netlink data is aligned to 4 Byte, which | |
1282 | * suffices for both ether_addr_copy and ether_addr_equal_64bits usage. | |
1283 | */ | |
1284 | static int macvlan_changelink_sources(struct macvlan_dev *vlan, u32 mode, | |
1285 | struct nlattr *data[]) | |
1286 | { | |
1287 | char *addr = NULL; | |
1288 | int ret, rem, len; | |
1289 | struct nlattr *nla, *head; | |
1290 | struct macvlan_source_entry *entry; | |
1291 | ||
1292 | if (data[IFLA_MACVLAN_MACADDR]) | |
1293 | addr = nla_data(data[IFLA_MACVLAN_MACADDR]); | |
1294 | ||
1295 | if (mode == MACVLAN_MACADDR_ADD) { | |
1296 | if (!addr) | |
1297 | return -EINVAL; | |
1298 | ||
1299 | return macvlan_hash_add_source(vlan, addr); | |
1300 | ||
1301 | } else if (mode == MACVLAN_MACADDR_DEL) { | |
1302 | if (!addr) | |
1303 | return -EINVAL; | |
1304 | ||
1305 | entry = macvlan_hash_lookup_source(vlan, addr); | |
1306 | if (entry) { | |
1307 | macvlan_hash_del_source(entry); | |
1308 | vlan->macaddr_count--; | |
1309 | } | |
1310 | } else if (mode == MACVLAN_MACADDR_FLUSH) { | |
1311 | macvlan_flush_sources(vlan->port, vlan); | |
1312 | } else if (mode == MACVLAN_MACADDR_SET) { | |
1313 | macvlan_flush_sources(vlan->port, vlan); | |
1314 | ||
1315 | if (addr) { | |
1316 | ret = macvlan_hash_add_source(vlan, addr); | |
1317 | if (ret) | |
1318 | return ret; | |
1319 | } | |
1320 | ||
1321 | if (!data || !data[IFLA_MACVLAN_MACADDR_DATA]) | |
1322 | return 0; | |
1323 | ||
1324 | head = nla_data(data[IFLA_MACVLAN_MACADDR_DATA]); | |
1325 | len = nla_len(data[IFLA_MACVLAN_MACADDR_DATA]); | |
1326 | ||
1327 | nla_for_each_attr(nla, head, len, rem) { | |
1328 | if (nla_type(nla) != IFLA_MACVLAN_MACADDR || | |
1329 | nla_len(nla) != ETH_ALEN) | |
1330 | continue; | |
1331 | ||
1332 | addr = nla_data(nla); | |
1333 | ret = macvlan_hash_add_source(vlan, addr); | |
1334 | if (ret) | |
1335 | return ret; | |
1336 | } | |
1337 | } else { | |
1338 | return -EINVAL; | |
1339 | } | |
1340 | ||
b863ceb7 PM |
1341 | return 0; |
1342 | } | |
1343 | ||
fc0663d6 | 1344 | int macvlan_common_newlink(struct net *src_net, struct net_device *dev, |
42ab19ee DA |
1345 | struct nlattr *tb[], struct nlattr *data[], |
1346 | struct netlink_ext_ack *extack) | |
b863ceb7 PM |
1347 | { |
1348 | struct macvlan_dev *vlan = netdev_priv(dev); | |
1349 | struct macvlan_port *port; | |
1350 | struct net_device *lowerdev; | |
1351 | int err; | |
79cf79ab | 1352 | int macmode; |
aa5fd0fb | 1353 | bool create = false; |
b863ceb7 PM |
1354 | |
1355 | if (!tb[IFLA_LINK]) | |
1356 | return -EINVAL; | |
1357 | ||
81adee47 | 1358 | lowerdev = __dev_get_by_index(src_net, nla_get_u32(tb[IFLA_LINK])); |
b863ceb7 PM |
1359 | if (lowerdev == NULL) |
1360 | return -ENODEV; | |
1361 | ||
d70f2cf5 | 1362 | /* When creating macvlans or macvtaps on top of other macvlans - use |
b0832a29 | 1363 | * the real device as the lowerdev. |
a6ca5f1d | 1364 | */ |
d70f2cf5 KW |
1365 | if (netif_is_macvlan(lowerdev)) |
1366 | lowerdev = macvlan_dev_real_dev(lowerdev); | |
a6ca5f1d | 1367 | |
b863ceb7 PM |
1368 | if (!tb[IFLA_MTU]) |
1369 | dev->mtu = lowerdev->mtu; | |
1370 | else if (dev->mtu > lowerdev->mtu) | |
1371 | return -EINVAL; | |
1372 | ||
91572088 JW |
1373 | /* MTU range: 68 - lowerdev->max_mtu */ |
1374 | dev->min_mtu = ETH_MIN_MTU; | |
1375 | dev->max_mtu = lowerdev->max_mtu; | |
1376 | ||
b863ceb7 | 1377 | if (!tb[IFLA_ADDRESS]) |
7ce5d222 | 1378 | eth_hw_addr_random(dev); |
b863ceb7 | 1379 | |
913564fb | 1380 | if (!netif_is_macvlan_port(lowerdev)) { |
b863ceb7 PM |
1381 | err = macvlan_port_create(lowerdev); |
1382 | if (err < 0) | |
1383 | return err; | |
aa5fd0fb | 1384 | create = true; |
b863ceb7 | 1385 | } |
e052f7e6 | 1386 | port = macvlan_port_get_rtnl(lowerdev); |
b863ceb7 | 1387 | |
eb06acdc | 1388 | /* Only 1 macvlan device can be created in passthru mode */ |
43c2d578 | 1389 | if (macvlan_passthru(port)) { |
aa5fd0fb GF |
1390 | /* The macvlan port must be not created this time, |
1391 | * still goto destroy_macvlan_port for readability. | |
1392 | */ | |
1393 | err = -EINVAL; | |
1394 | goto destroy_macvlan_port; | |
1395 | } | |
eb06acdc | 1396 | |
b863ceb7 PM |
1397 | vlan->lowerdev = lowerdev; |
1398 | vlan->dev = dev; | |
1399 | vlan->port = port; | |
2be5c767 | 1400 | vlan->set_features = MACVLAN_FEATURES; |
952fcfd0 | 1401 | vlan->nest_level = dev_get_nest_level(lowerdev) + 1; |
b863ceb7 | 1402 | |
27c0b1a8 AB |
1403 | vlan->mode = MACVLAN_MODE_VEPA; |
1404 | if (data && data[IFLA_MACVLAN_MODE]) | |
1405 | vlan->mode = nla_get_u32(data[IFLA_MACVLAN_MODE]); | |
1406 | ||
df8ef8f3 JF |
1407 | if (data && data[IFLA_MACVLAN_FLAGS]) |
1408 | vlan->flags = nla_get_u16(data[IFLA_MACVLAN_FLAGS]); | |
1409 | ||
eb06acdc | 1410 | if (vlan->mode == MACVLAN_MODE_PASSTHRU) { |
aa5fd0fb GF |
1411 | if (port->count) { |
1412 | err = -EINVAL; | |
1413 | goto destroy_macvlan_port; | |
1414 | } | |
43c2d578 | 1415 | macvlan_set_passthru(port); |
8b98604e | 1416 | eth_hw_addr_inherit(dev, lowerdev); |
eb06acdc SS |
1417 | } |
1418 | ||
79cf79ab | 1419 | if (data && data[IFLA_MACVLAN_MACADDR_MODE]) { |
aa5fd0fb GF |
1420 | if (vlan->mode != MACVLAN_MODE_SOURCE) { |
1421 | err = -EINVAL; | |
1422 | goto destroy_macvlan_port; | |
1423 | } | |
79cf79ab MB |
1424 | macmode = nla_get_u32(data[IFLA_MACVLAN_MACADDR_MODE]); |
1425 | err = macvlan_changelink_sources(vlan, macmode, data); | |
1426 | if (err) | |
aa5fd0fb | 1427 | goto destroy_macvlan_port; |
79cf79ab MB |
1428 | } |
1429 | ||
47d4ab91 JF |
1430 | err = register_netdevice(dev); |
1431 | if (err < 0) | |
aa5fd0fb | 1432 | goto destroy_macvlan_port; |
47d4ab91 | 1433 | |
a6cc0cfa | 1434 | dev->priv_flags |= IFF_MACVLAN; |
42ab19ee | 1435 | err = netdev_upper_dev_link(lowerdev, dev, extack); |
7cd43db7 | 1436 | if (err) |
da37705c | 1437 | goto unregister_netdev; |
b863ceb7 | 1438 | |
233c7df0 | 1439 | list_add_tail_rcu(&vlan->list, &port->vlans); |
fc4a7489 | 1440 | netif_stacked_transfer_operstate(lowerdev, dev); |
de7d244d | 1441 | linkwatch_fire_event(dev); |
f16d3d57 | 1442 | |
b863ceb7 | 1443 | return 0; |
f16d3d57 | 1444 | |
da37705c | 1445 | unregister_netdev: |
d02fd6e7 | 1446 | /* macvlan_uninit would free the macvlan port */ |
da37705c | 1447 | unregister_netdevice(dev); |
d02fd6e7 | 1448 | return err; |
aa5fd0fb | 1449 | destroy_macvlan_port: |
d02fd6e7 GF |
1450 | /* the macvlan port may be freed by macvlan_uninit when fail to register. |
1451 | * so we destroy the macvlan port only when it's valid. | |
1452 | */ | |
4e14bf42 | 1453 | if (create && macvlan_port_get_rtnl(lowerdev)) |
aa5fd0fb | 1454 | macvlan_port_destroy(port->dev); |
f16d3d57 | 1455 | return err; |
b863ceb7 | 1456 | } |
fc0663d6 | 1457 | EXPORT_SYMBOL_GPL(macvlan_common_newlink); |
b863ceb7 | 1458 | |
fc0663d6 | 1459 | static int macvlan_newlink(struct net *src_net, struct net_device *dev, |
7a3f4a18 MS |
1460 | struct nlattr *tb[], struct nlattr *data[], |
1461 | struct netlink_ext_ack *extack) | |
fc0663d6 | 1462 | { |
42ab19ee | 1463 | return macvlan_common_newlink(src_net, dev, tb, data, extack); |
fc0663d6 AB |
1464 | } |
1465 | ||
1466 | void macvlan_dellink(struct net_device *dev, struct list_head *head) | |
b863ceb7 PM |
1467 | { |
1468 | struct macvlan_dev *vlan = netdev_priv(dev); | |
b863ceb7 | 1469 | |
79cf79ab MB |
1470 | if (vlan->mode == MACVLAN_MODE_SOURCE) |
1471 | macvlan_flush_sources(vlan->port, vlan); | |
233c7df0 | 1472 | list_del_rcu(&vlan->list); |
23289a37 | 1473 | unregister_netdevice_queue(dev, head); |
7cd43db7 | 1474 | netdev_upper_dev_unlink(vlan->lowerdev, dev); |
b863ceb7 | 1475 | } |
fc0663d6 | 1476 | EXPORT_SYMBOL_GPL(macvlan_dellink); |
b863ceb7 | 1477 | |
27c0b1a8 | 1478 | static int macvlan_changelink(struct net_device *dev, |
ad744b22 MS |
1479 | struct nlattr *tb[], struct nlattr *data[], |
1480 | struct netlink_ext_ack *extack) | |
27c0b1a8 AB |
1481 | { |
1482 | struct macvlan_dev *vlan = netdev_priv(dev); | |
266e8347 MT |
1483 | enum macvlan_mode mode; |
1484 | bool set_mode = false; | |
79cf79ab MB |
1485 | enum macvlan_macaddr_mode macmode; |
1486 | int ret; | |
266e8347 MT |
1487 | |
1488 | /* Validate mode, but don't set yet: setting flags may fail. */ | |
1489 | if (data && data[IFLA_MACVLAN_MODE]) { | |
1490 | set_mode = true; | |
1491 | mode = nla_get_u32(data[IFLA_MACVLAN_MODE]); | |
1492 | /* Passthrough mode can't be set or cleared dynamically */ | |
1493 | if ((mode == MACVLAN_MODE_PASSTHRU) != | |
1494 | (vlan->mode == MACVLAN_MODE_PASSTHRU)) | |
1495 | return -EINVAL; | |
79cf79ab MB |
1496 | if (vlan->mode == MACVLAN_MODE_SOURCE && |
1497 | vlan->mode != mode) | |
1498 | macvlan_flush_sources(vlan->port, vlan); | |
266e8347 | 1499 | } |
99ffc3e7 | 1500 | |
df8ef8f3 JF |
1501 | if (data && data[IFLA_MACVLAN_FLAGS]) { |
1502 | __u16 flags = nla_get_u16(data[IFLA_MACVLAN_FLAGS]); | |
1503 | bool promisc = (flags ^ vlan->flags) & MACVLAN_FLAG_NOPROMISC; | |
43c2d578 | 1504 | if (macvlan_passthru(vlan->port) && promisc) { |
99ffc3e7 MT |
1505 | int err; |
1506 | ||
1507 | if (flags & MACVLAN_FLAG_NOPROMISC) | |
1508 | err = dev_set_promiscuity(vlan->lowerdev, -1); | |
1509 | else | |
1510 | err = dev_set_promiscuity(vlan->lowerdev, 1); | |
1511 | if (err < 0) | |
1512 | return err; | |
1513 | } | |
df8ef8f3 JF |
1514 | vlan->flags = flags; |
1515 | } | |
266e8347 MT |
1516 | if (set_mode) |
1517 | vlan->mode = mode; | |
79cf79ab MB |
1518 | if (data && data[IFLA_MACVLAN_MACADDR_MODE]) { |
1519 | if (vlan->mode != MACVLAN_MODE_SOURCE) | |
1520 | return -EINVAL; | |
1521 | macmode = nla_get_u32(data[IFLA_MACVLAN_MACADDR_MODE]); | |
1522 | ret = macvlan_changelink_sources(vlan, macmode, data); | |
1523 | if (ret) | |
1524 | return ret; | |
1525 | } | |
27c0b1a8 AB |
1526 | return 0; |
1527 | } | |
1528 | ||
79cf79ab MB |
1529 | static size_t macvlan_get_size_mac(const struct macvlan_dev *vlan) |
1530 | { | |
1531 | if (vlan->macaddr_count == 0) | |
1532 | return 0; | |
1533 | return nla_total_size(0) /* IFLA_MACVLAN_MACADDR_DATA */ | |
1534 | + vlan->macaddr_count * nla_total_size(sizeof(u8) * ETH_ALEN); | |
1535 | } | |
1536 | ||
27c0b1a8 AB |
1537 | static size_t macvlan_get_size(const struct net_device *dev) |
1538 | { | |
79cf79ab MB |
1539 | struct macvlan_dev *vlan = netdev_priv(dev); |
1540 | ||
01fe944f ED |
1541 | return (0 |
1542 | + nla_total_size(4) /* IFLA_MACVLAN_MODE */ | |
1543 | + nla_total_size(2) /* IFLA_MACVLAN_FLAGS */ | |
79cf79ab MB |
1544 | + nla_total_size(4) /* IFLA_MACVLAN_MACADDR_COUNT */ |
1545 | + macvlan_get_size_mac(vlan) /* IFLA_MACVLAN_MACADDR */ | |
01fe944f | 1546 | ); |
27c0b1a8 AB |
1547 | } |
1548 | ||
79cf79ab MB |
1549 | static int macvlan_fill_info_macaddr(struct sk_buff *skb, |
1550 | const struct macvlan_dev *vlan, | |
1551 | const int i) | |
1552 | { | |
1553 | struct hlist_head *h = &vlan->port->vlan_source_hash[i]; | |
1554 | struct macvlan_source_entry *entry; | |
1555 | ||
1556 | hlist_for_each_entry_rcu(entry, h, hlist) { | |
1557 | if (entry->vlan != vlan) | |
1558 | continue; | |
1559 | if (nla_put(skb, IFLA_MACVLAN_MACADDR, ETH_ALEN, entry->addr)) | |
1560 | return 1; | |
1561 | } | |
1562 | return 0; | |
1563 | } | |
1564 | ||
27c0b1a8 AB |
1565 | static int macvlan_fill_info(struct sk_buff *skb, |
1566 | const struct net_device *dev) | |
1567 | { | |
1568 | struct macvlan_dev *vlan = netdev_priv(dev); | |
79cf79ab MB |
1569 | int i; |
1570 | struct nlattr *nest; | |
27c0b1a8 | 1571 | |
ead9a76c DM |
1572 | if (nla_put_u32(skb, IFLA_MACVLAN_MODE, vlan->mode)) |
1573 | goto nla_put_failure; | |
df8ef8f3 JF |
1574 | if (nla_put_u16(skb, IFLA_MACVLAN_FLAGS, vlan->flags)) |
1575 | goto nla_put_failure; | |
79cf79ab MB |
1576 | if (nla_put_u32(skb, IFLA_MACVLAN_MACADDR_COUNT, vlan->macaddr_count)) |
1577 | goto nla_put_failure; | |
1578 | if (vlan->macaddr_count > 0) { | |
1579 | nest = nla_nest_start(skb, IFLA_MACVLAN_MACADDR_DATA); | |
1580 | if (nest == NULL) | |
1581 | goto nla_put_failure; | |
1582 | ||
1583 | for (i = 0; i < MACVLAN_HASH_SIZE; i++) { | |
1584 | if (macvlan_fill_info_macaddr(skb, vlan, i)) | |
1585 | goto nla_put_failure; | |
1586 | } | |
1587 | nla_nest_end(skb, nest); | |
1588 | } | |
27c0b1a8 AB |
1589 | return 0; |
1590 | ||
1591 | nla_put_failure: | |
1592 | return -EMSGSIZE; | |
1593 | } | |
1594 | ||
1595 | static const struct nla_policy macvlan_policy[IFLA_MACVLAN_MAX + 1] = { | |
df8ef8f3 JF |
1596 | [IFLA_MACVLAN_MODE] = { .type = NLA_U32 }, |
1597 | [IFLA_MACVLAN_FLAGS] = { .type = NLA_U16 }, | |
79cf79ab MB |
1598 | [IFLA_MACVLAN_MACADDR_MODE] = { .type = NLA_U32 }, |
1599 | [IFLA_MACVLAN_MACADDR] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN }, | |
1600 | [IFLA_MACVLAN_MACADDR_DATA] = { .type = NLA_NESTED }, | |
1601 | [IFLA_MACVLAN_MACADDR_COUNT] = { .type = NLA_U32 }, | |
27c0b1a8 AB |
1602 | }; |
1603 | ||
fc0663d6 AB |
1604 | int macvlan_link_register(struct rtnl_link_ops *ops) |
1605 | { | |
1606 | /* common fields */ | |
fc0663d6 AB |
1607 | ops->validate = macvlan_validate; |
1608 | ops->maxtype = IFLA_MACVLAN_MAX; | |
1609 | ops->policy = macvlan_policy; | |
1610 | ops->changelink = macvlan_changelink; | |
1611 | ops->get_size = macvlan_get_size; | |
1612 | ops->fill_info = macvlan_fill_info; | |
1613 | ||
1614 | return rtnl_link_register(ops); | |
1615 | }; | |
1616 | EXPORT_SYMBOL_GPL(macvlan_link_register); | |
1617 | ||
eaca400f ND |
1618 | static struct net *macvlan_get_link_net(const struct net_device *dev) |
1619 | { | |
1620 | return dev_net(macvlan_dev_real_dev(dev)); | |
1621 | } | |
1622 | ||
fc0663d6 | 1623 | static struct rtnl_link_ops macvlan_link_ops = { |
b863ceb7 | 1624 | .kind = "macvlan", |
8a35747a | 1625 | .setup = macvlan_setup, |
b863ceb7 PM |
1626 | .newlink = macvlan_newlink, |
1627 | .dellink = macvlan_dellink, | |
eaca400f | 1628 | .get_link_net = macvlan_get_link_net, |
6fe3faf8 | 1629 | .priv_size = sizeof(struct macvlan_dev), |
b863ceb7 PM |
1630 | }; |
1631 | ||
1632 | static int macvlan_device_event(struct notifier_block *unused, | |
1633 | unsigned long event, void *ptr) | |
1634 | { | |
351638e7 | 1635 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); |
b863ceb7 PM |
1636 | struct macvlan_dev *vlan, *next; |
1637 | struct macvlan_port *port; | |
226bd341 | 1638 | LIST_HEAD(list_kill); |
b863ceb7 | 1639 | |
913564fb | 1640 | if (!netif_is_macvlan_port(dev)) |
b863ceb7 PM |
1641 | return NOTIFY_DONE; |
1642 | ||
e052f7e6 | 1643 | port = macvlan_port_get_rtnl(dev); |
a35e2c1b | 1644 | |
b863ceb7 | 1645 | switch (event) { |
de7d244d | 1646 | case NETDEV_UP: |
80fd2d6c | 1647 | case NETDEV_DOWN: |
b863ceb7 PM |
1648 | case NETDEV_CHANGE: |
1649 | list_for_each_entry(vlan, &port->vlans, list) | |
fc4a7489 PM |
1650 | netif_stacked_transfer_operstate(vlan->lowerdev, |
1651 | vlan->dev); | |
b863ceb7 PM |
1652 | break; |
1653 | case NETDEV_FEAT_CHANGE: | |
1654 | list_for_each_entry(vlan, &port->vlans, list) { | |
8c2acc53 | 1655 | vlan->dev->gso_max_size = dev->gso_max_size; |
f6773c5e | 1656 | vlan->dev->gso_max_segs = dev->gso_max_segs; |
797f87f8 | 1657 | netdev_update_features(vlan->dev); |
b863ceb7 PM |
1658 | } |
1659 | break; | |
3763e7ef | 1660 | case NETDEV_CHANGEMTU: |
1661 | list_for_each_entry(vlan, &port->vlans, list) { | |
1662 | if (vlan->dev->mtu <= dev->mtu) | |
1663 | continue; | |
1664 | dev_set_mtu(vlan->dev, dev->mtu); | |
1665 | } | |
e289fd28 | 1666 | break; |
1667 | case NETDEV_CHANGEADDR: | |
43c2d578 | 1668 | if (!macvlan_passthru(port)) |
e289fd28 | 1669 | return NOTIFY_DONE; |
1670 | ||
1671 | vlan = list_first_entry_or_null(&port->vlans, | |
1672 | struct macvlan_dev, | |
1673 | list); | |
1674 | ||
1675 | if (macvlan_sync_address(vlan->dev, dev->dev_addr)) | |
1676 | return NOTIFY_BAD; | |
1677 | ||
3763e7ef | 1678 | break; |
b863ceb7 | 1679 | case NETDEV_UNREGISTER: |
3b27e105 DL |
1680 | /* twiddle thumbs on netns device moves */ |
1681 | if (dev->reg_state != NETREG_UNREGISTERING) | |
1682 | break; | |
1683 | ||
b863ceb7 | 1684 | list_for_each_entry_safe(vlan, next, &port->vlans, list) |
226bd341 ED |
1685 | vlan->dev->rtnl_link_ops->dellink(vlan->dev, &list_kill); |
1686 | unregister_netdevice_many(&list_kill); | |
b863ceb7 | 1687 | break; |
1c01fe14 JP |
1688 | case NETDEV_PRE_TYPE_CHANGE: |
1689 | /* Forbid underlaying device to change its type. */ | |
1690 | return NOTIFY_BAD; | |
4c991255 VY |
1691 | |
1692 | case NETDEV_NOTIFY_PEERS: | |
1693 | case NETDEV_BONDING_FAILOVER: | |
1694 | case NETDEV_RESEND_IGMP: | |
1695 | /* Propagate to all vlans */ | |
1696 | list_for_each_entry(vlan, &port->vlans, list) | |
1697 | call_netdevice_notifiers(event, vlan->dev); | |
b863ceb7 PM |
1698 | } |
1699 | return NOTIFY_DONE; | |
1700 | } | |
1701 | ||
1702 | static struct notifier_block macvlan_notifier_block __read_mostly = { | |
1703 | .notifier_call = macvlan_device_event, | |
1704 | }; | |
1705 | ||
1706 | static int __init macvlan_init_module(void) | |
1707 | { | |
1708 | int err; | |
1709 | ||
1710 | register_netdevice_notifier(&macvlan_notifier_block); | |
b863ceb7 | 1711 | |
fc0663d6 | 1712 | err = macvlan_link_register(&macvlan_link_ops); |
b863ceb7 PM |
1713 | if (err < 0) |
1714 | goto err1; | |
1715 | return 0; | |
1716 | err1: | |
b863ceb7 PM |
1717 | unregister_netdevice_notifier(&macvlan_notifier_block); |
1718 | return err; | |
1719 | } | |
1720 | ||
1721 | static void __exit macvlan_cleanup_module(void) | |
1722 | { | |
1723 | rtnl_link_unregister(&macvlan_link_ops); | |
b863ceb7 PM |
1724 | unregister_netdevice_notifier(&macvlan_notifier_block); |
1725 | } | |
1726 | ||
1727 | module_init(macvlan_init_module); | |
1728 | module_exit(macvlan_cleanup_module); | |
1729 | ||
1730 | MODULE_LICENSE("GPL"); | |
1731 | MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>"); | |
1732 | MODULE_DESCRIPTION("Driver for MAC address based VLANs"); | |
1733 | MODULE_ALIAS_RTNL_LINK("macvlan"); |