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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 | 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 | ||
a35e2c1b JP |
122 | #define macvlan_port_exists(dev) (dev->priv_flags & IFF_MACVLAN_PORT) |
123 | ||
b863ceb7 PM |
124 | static struct macvlan_dev *macvlan_hash_lookup(const struct macvlan_port *port, |
125 | const unsigned char *addr) | |
126 | { | |
127 | struct macvlan_dev *vlan; | |
79cf79ab | 128 | u32 idx = macvlan_eth_hash(addr); |
b863ceb7 | 129 | |
79cf79ab | 130 | hlist_for_each_entry_rcu(vlan, &port->vlan_hash[idx], hlist) { |
a6700db1 | 131 | if (ether_addr_equal_64bits(vlan->dev->dev_addr, addr)) |
b863ceb7 PM |
132 | return vlan; |
133 | } | |
134 | return NULL; | |
135 | } | |
136 | ||
79cf79ab MB |
137 | static struct macvlan_source_entry *macvlan_hash_lookup_source( |
138 | const struct macvlan_dev *vlan, | |
139 | const unsigned char *addr) | |
140 | { | |
141 | struct macvlan_source_entry *entry; | |
142 | u32 idx = macvlan_eth_hash(addr); | |
143 | struct hlist_head *h = &vlan->port->vlan_source_hash[idx]; | |
144 | ||
145 | hlist_for_each_entry_rcu(entry, h, hlist) { | |
146 | if (ether_addr_equal_64bits(entry->addr, addr) && | |
147 | entry->vlan == vlan) | |
148 | return entry; | |
149 | } | |
150 | return NULL; | |
151 | } | |
152 | ||
153 | static int macvlan_hash_add_source(struct macvlan_dev *vlan, | |
154 | const unsigned char *addr) | |
155 | { | |
156 | struct macvlan_port *port = vlan->port; | |
157 | struct macvlan_source_entry *entry; | |
158 | struct hlist_head *h; | |
159 | ||
160 | entry = macvlan_hash_lookup_source(vlan, addr); | |
161 | if (entry) | |
162 | return 0; | |
163 | ||
164 | entry = kmalloc(sizeof(*entry), GFP_KERNEL); | |
165 | if (!entry) | |
166 | return -ENOMEM; | |
167 | ||
168 | ether_addr_copy(entry->addr, addr); | |
169 | entry->vlan = vlan; | |
170 | h = &port->vlan_source_hash[macvlan_eth_hash(addr)]; | |
171 | hlist_add_head_rcu(&entry->hlist, h); | |
172 | vlan->macaddr_count++; | |
173 | ||
174 | return 0; | |
175 | } | |
176 | ||
f9ac30f0 EB |
177 | static void macvlan_hash_add(struct macvlan_dev *vlan) |
178 | { | |
179 | struct macvlan_port *port = vlan->port; | |
180 | const unsigned char *addr = vlan->dev->dev_addr; | |
79cf79ab | 181 | u32 idx = macvlan_eth_hash(addr); |
f9ac30f0 | 182 | |
79cf79ab MB |
183 | hlist_add_head_rcu(&vlan->hlist, &port->vlan_hash[idx]); |
184 | } | |
185 | ||
186 | static void macvlan_hash_del_source(struct macvlan_source_entry *entry) | |
187 | { | |
188 | hlist_del_rcu(&entry->hlist); | |
189 | kfree_rcu(entry, rcu); | |
f9ac30f0 EB |
190 | } |
191 | ||
449f4544 | 192 | static void macvlan_hash_del(struct macvlan_dev *vlan, bool sync) |
f9ac30f0 EB |
193 | { |
194 | hlist_del_rcu(&vlan->hlist); | |
449f4544 ED |
195 | if (sync) |
196 | synchronize_rcu(); | |
f9ac30f0 EB |
197 | } |
198 | ||
199 | static void macvlan_hash_change_addr(struct macvlan_dev *vlan, | |
200 | const unsigned char *addr) | |
201 | { | |
449f4544 | 202 | macvlan_hash_del(vlan, true); |
f9ac30f0 EB |
203 | /* Now that we are unhashed it is safe to change the device |
204 | * address without confusing packet delivery. | |
205 | */ | |
206 | memcpy(vlan->dev->dev_addr, addr, ETH_ALEN); | |
207 | macvlan_hash_add(vlan); | |
208 | } | |
209 | ||
d94d0254 GF |
210 | static bool macvlan_addr_busy(const struct macvlan_port *port, |
211 | const unsigned char *addr) | |
f9ac30f0 | 212 | { |
18c8c54d | 213 | /* Test to see if the specified address is |
f9ac30f0 EB |
214 | * currently in use by the underlying device or |
215 | * another macvlan. | |
216 | */ | |
18c8c54d | 217 | if (!macvlan_passthru(port) && !macvlan_addr_change(port) && |
e696cda7 | 218 | ether_addr_equal_64bits(port->dev->dev_addr, addr)) |
d94d0254 | 219 | return true; |
f9ac30f0 EB |
220 | |
221 | if (macvlan_hash_lookup(port, addr)) | |
d94d0254 | 222 | return true; |
f9ac30f0 | 223 | |
d94d0254 | 224 | return false; |
f9ac30f0 EB |
225 | } |
226 | ||
a1e514c5 | 227 | |
fc0663d6 AB |
228 | static int macvlan_broadcast_one(struct sk_buff *skb, |
229 | const struct macvlan_dev *vlan, | |
618e1b74 | 230 | const struct ethhdr *eth, bool local) |
a1e514c5 | 231 | { |
fc0663d6 | 232 | struct net_device *dev = vlan->dev; |
a1e514c5 | 233 | |
618e1b74 | 234 | if (local) |
412ca155 | 235 | return __dev_forward_skb(dev, skb); |
618e1b74 | 236 | |
a1e514c5 | 237 | skb->dev = dev; |
a6700db1 | 238 | if (ether_addr_equal_64bits(eth->h_dest, dev->broadcast)) |
a1e514c5 AB |
239 | skb->pkt_type = PACKET_BROADCAST; |
240 | else | |
241 | skb->pkt_type = PACKET_MULTICAST; | |
242 | ||
412ca155 | 243 | return 0; |
a1e514c5 AB |
244 | } |
245 | ||
3807ff58 ED |
246 | static u32 macvlan_hash_mix(const struct macvlan_dev *vlan) |
247 | { | |
248 | return (u32)(((unsigned long)vlan) >> L1_CACHE_SHIFT); | |
249 | } | |
250 | ||
251 | ||
252 | static unsigned int mc_hash(const struct macvlan_dev *vlan, | |
253 | const unsigned char *addr) | |
cd431e73 ED |
254 | { |
255 | u32 val = __get_unaligned_cpu32(addr + 2); | |
256 | ||
3807ff58 | 257 | val ^= macvlan_hash_mix(vlan); |
cd431e73 ED |
258 | return hash_32(val, MACVLAN_MC_FILTER_BITS); |
259 | } | |
260 | ||
b863ceb7 | 261 | static void macvlan_broadcast(struct sk_buff *skb, |
618e1b74 AB |
262 | const struct macvlan_port *port, |
263 | struct net_device *src, | |
264 | enum macvlan_mode mode) | |
b863ceb7 | 265 | { |
d19d68c0 | 266 | const struct ethhdr *eth = eth_hdr(skb); |
b863ceb7 | 267 | const struct macvlan_dev *vlan; |
b863ceb7 PM |
268 | struct sk_buff *nskb; |
269 | unsigned int i; | |
a1e514c5 | 270 | int err; |
3807ff58 | 271 | unsigned int hash; |
b863ceb7 | 272 | |
efbbced3 PM |
273 | if (skb->protocol == htons(ETH_P_PAUSE)) |
274 | return; | |
275 | ||
b863ceb7 | 276 | for (i = 0; i < MACVLAN_HASH_SIZE; i++) { |
b67bfe0d | 277 | hlist_for_each_entry_rcu(vlan, &port->vlan_hash[i], hlist) { |
618e1b74 AB |
278 | if (vlan->dev == src || !(vlan->mode & mode)) |
279 | continue; | |
280 | ||
3807ff58 | 281 | hash = mc_hash(vlan, eth->h_dest); |
cd431e73 ED |
282 | if (!test_bit(hash, vlan->mc_filter)) |
283 | continue; | |
de9e8f3f HX |
284 | |
285 | err = NET_RX_DROP; | |
b863ceb7 | 286 | nskb = skb_clone(skb, GFP_ATOMIC); |
de9e8f3f HX |
287 | if (likely(nskb)) |
288 | err = macvlan_broadcast_one( | |
289 | nskb, vlan, eth, | |
412ca155 HX |
290 | mode == MACVLAN_MODE_BRIDGE) ?: |
291 | netif_rx_ni(nskb); | |
a1e514c5 | 292 | macvlan_count_rx(vlan, skb->len + ETH_HLEN, |
4c979935 | 293 | err == NET_RX_SUCCESS, true); |
b863ceb7 PM |
294 | } |
295 | } | |
296 | } | |
297 | ||
412ca155 | 298 | static void macvlan_process_broadcast(struct work_struct *w) |
b863ceb7 | 299 | { |
412ca155 HX |
300 | struct macvlan_port *port = container_of(w, struct macvlan_port, |
301 | bc_work); | |
302 | struct sk_buff *skb; | |
303 | struct sk_buff_head list; | |
304 | ||
fe0ca732 | 305 | __skb_queue_head_init(&list); |
412ca155 HX |
306 | |
307 | spin_lock_bh(&port->bc_queue.lock); | |
308 | skb_queue_splice_tail_init(&port->bc_queue, &list); | |
309 | spin_unlock_bh(&port->bc_queue.lock); | |
310 | ||
311 | while ((skb = __skb_dequeue(&list))) { | |
312 | const struct macvlan_dev *src = MACVLAN_SKB_CB(skb)->src; | |
313 | ||
314 | rcu_read_lock(); | |
b863ceb7 | 315 | |
618e1b74 AB |
316 | if (!src) |
317 | /* frame comes from an external address */ | |
318 | macvlan_broadcast(skb, port, NULL, | |
319 | MACVLAN_MODE_PRIVATE | | |
320 | MACVLAN_MODE_VEPA | | |
eb06acdc | 321 | MACVLAN_MODE_PASSTHRU| |
618e1b74 AB |
322 | MACVLAN_MODE_BRIDGE); |
323 | else if (src->mode == MACVLAN_MODE_VEPA) | |
324 | /* flood to everyone except source */ | |
325 | macvlan_broadcast(skb, port, src->dev, | |
326 | MACVLAN_MODE_VEPA | | |
327 | MACVLAN_MODE_BRIDGE); | |
412ca155 | 328 | else |
618e1b74 AB |
329 | /* |
330 | * flood only to VEPA ports, bridge ports | |
331 | * already saw the frame on the way out. | |
332 | */ | |
333 | macvlan_broadcast(skb, port, src->dev, | |
334 | MACVLAN_MODE_VEPA); | |
412ca155 HX |
335 | |
336 | rcu_read_unlock(); | |
337 | ||
260916df HX |
338 | if (src) |
339 | dev_put(src->dev); | |
412ca155 HX |
340 | kfree_skb(skb); |
341 | } | |
342 | } | |
343 | ||
344 | static void macvlan_broadcast_enqueue(struct macvlan_port *port, | |
260916df | 345 | const struct macvlan_dev *src, |
412ca155 HX |
346 | struct sk_buff *skb) |
347 | { | |
e676f197 | 348 | struct sk_buff *nskb; |
412ca155 HX |
349 | int err = -ENOMEM; |
350 | ||
e676f197 HX |
351 | nskb = skb_clone(skb, GFP_ATOMIC); |
352 | if (!nskb) | |
412ca155 HX |
353 | goto err; |
354 | ||
260916df HX |
355 | MACVLAN_SKB_CB(nskb)->src = src; |
356 | ||
412ca155 | 357 | spin_lock(&port->bc_queue.lock); |
07d92d5c | 358 | if (skb_queue_len(&port->bc_queue) < MACVLAN_BC_QUEUE_LEN) { |
260916df HX |
359 | if (src) |
360 | dev_hold(src->dev); | |
e676f197 | 361 | __skb_queue_tail(&port->bc_queue, nskb); |
412ca155 HX |
362 | err = 0; |
363 | } | |
364 | spin_unlock(&port->bc_queue.lock); | |
365 | ||
cd1578b2 MD |
366 | schedule_work(&port->bc_work); |
367 | ||
412ca155 | 368 | if (err) |
e676f197 | 369 | goto free_nskb; |
412ca155 | 370 | |
412ca155 HX |
371 | return; |
372 | ||
e676f197 HX |
373 | free_nskb: |
374 | kfree_skb(nskb); | |
412ca155 HX |
375 | err: |
376 | atomic_long_inc(&skb->dev->rx_dropped); | |
377 | } | |
378 | ||
79cf79ab MB |
379 | static void macvlan_flush_sources(struct macvlan_port *port, |
380 | struct macvlan_dev *vlan) | |
381 | { | |
382 | int i; | |
383 | ||
384 | for (i = 0; i < MACVLAN_HASH_SIZE; i++) { | |
385 | struct hlist_node *h, *n; | |
386 | ||
387 | hlist_for_each_safe(h, n, &port->vlan_source_hash[i]) { | |
388 | struct macvlan_source_entry *entry; | |
389 | ||
390 | entry = hlist_entry(h, struct macvlan_source_entry, | |
391 | hlist); | |
392 | if (entry->vlan == vlan) | |
393 | macvlan_hash_del_source(entry); | |
394 | } | |
395 | } | |
396 | vlan->macaddr_count = 0; | |
397 | } | |
398 | ||
399 | static void macvlan_forward_source_one(struct sk_buff *skb, | |
400 | struct macvlan_dev *vlan) | |
401 | { | |
402 | struct sk_buff *nskb; | |
403 | struct net_device *dev; | |
404 | int len; | |
405 | int ret; | |
406 | ||
407 | dev = vlan->dev; | |
408 | if (unlikely(!(dev->flags & IFF_UP))) | |
409 | return; | |
410 | ||
411 | nskb = skb_clone(skb, GFP_ATOMIC); | |
412 | if (!nskb) | |
413 | return; | |
414 | ||
415 | len = nskb->len + ETH_HLEN; | |
416 | nskb->dev = dev; | |
c8c41ea1 AD |
417 | |
418 | if (ether_addr_equal_64bits(eth_hdr(skb)->h_dest, dev->dev_addr)) | |
419 | nskb->pkt_type = PACKET_HOST; | |
79cf79ab MB |
420 | |
421 | ret = netif_rx(nskb); | |
4c979935 | 422 | macvlan_count_rx(vlan, len, ret == NET_RX_SUCCESS, false); |
79cf79ab MB |
423 | } |
424 | ||
425 | static void macvlan_forward_source(struct sk_buff *skb, | |
426 | struct macvlan_port *port, | |
427 | const unsigned char *addr) | |
428 | { | |
429 | struct macvlan_source_entry *entry; | |
430 | u32 idx = macvlan_eth_hash(addr); | |
431 | struct hlist_head *h = &port->vlan_source_hash[idx]; | |
432 | ||
433 | hlist_for_each_entry_rcu(entry, h, hlist) { | |
434 | if (ether_addr_equal_64bits(entry->addr, addr)) | |
fc51f2b7 | 435 | macvlan_forward_source_one(skb, entry->vlan); |
79cf79ab MB |
436 | } |
437 | } | |
438 | ||
412ca155 HX |
439 | /* called under rcu_read_lock() from netif_receive_skb */ |
440 | static rx_handler_result_t macvlan_handle_frame(struct sk_buff **pskb) | |
441 | { | |
442 | struct macvlan_port *port; | |
443 | struct sk_buff *skb = *pskb; | |
444 | const struct ethhdr *eth = eth_hdr(skb); | |
445 | const struct macvlan_dev *vlan; | |
446 | const struct macvlan_dev *src; | |
447 | struct net_device *dev; | |
448 | unsigned int len = 0; | |
d1dd9119 | 449 | int ret; |
450 | rx_handler_result_t handle_res; | |
412ca155 HX |
451 | |
452 | port = macvlan_port_get_rcu(skb->dev); | |
453 | if (is_multicast_ether_addr(eth->h_dest)) { | |
9c127a01 HX |
454 | unsigned int hash; |
455 | ||
19bcf9f2 | 456 | skb = ip_check_defrag(dev_net(skb->dev), skb, IP_DEFRAG_MACVLAN); |
412ca155 HX |
457 | if (!skb) |
458 | return RX_HANDLER_CONSUMED; | |
e639b8d8 | 459 | *pskb = skb; |
412ca155 | 460 | eth = eth_hdr(skb); |
79cf79ab | 461 | macvlan_forward_source(skb, port, eth->h_source); |
412ca155 HX |
462 | src = macvlan_hash_lookup(port, eth->h_source); |
463 | if (src && src->mode != MACVLAN_MODE_VEPA && | |
464 | src->mode != MACVLAN_MODE_BRIDGE) { | |
729e72a1 | 465 | /* forward to original port. */ |
466 | vlan = src; | |
412ca155 HX |
467 | ret = macvlan_broadcast_one(skb, vlan, eth, 0) ?: |
468 | netif_rx(skb); | |
d1dd9119 | 469 | handle_res = RX_HANDLER_CONSUMED; |
729e72a1 | 470 | goto out; |
471 | } | |
472 | ||
9c127a01 HX |
473 | hash = mc_hash(NULL, eth->h_dest); |
474 | if (test_bit(hash, port->mc_filter)) | |
475 | macvlan_broadcast_enqueue(port, src, skb); | |
412ca155 | 476 | |
8a4eb573 | 477 | return RX_HANDLER_PASS; |
b863ceb7 PM |
478 | } |
479 | ||
79cf79ab | 480 | macvlan_forward_source(skb, port, eth->h_source); |
43c2d578 | 481 | if (macvlan_passthru(port)) |
233c7df0 JP |
482 | vlan = list_first_or_null_rcu(&port->vlans, |
483 | struct macvlan_dev, list); | |
eb06acdc SS |
484 | else |
485 | vlan = macvlan_hash_lookup(port, eth->h_dest); | |
dd6b9c2c | 486 | if (!vlan || vlan->mode == MACVLAN_MODE_SOURCE) |
8a4eb573 | 487 | return RX_HANDLER_PASS; |
b863ceb7 PM |
488 | |
489 | dev = vlan->dev; | |
490 | if (unlikely(!(dev->flags & IFF_UP))) { | |
491 | kfree_skb(skb); | |
8a4eb573 | 492 | return RX_HANDLER_CONSUMED; |
b863ceb7 | 493 | } |
a1e514c5 | 494 | len = skb->len + ETH_HLEN; |
b863ceb7 | 495 | skb = skb_share_check(skb, GFP_ATOMIC); |
d1dd9119 | 496 | if (!skb) { |
497 | ret = NET_RX_DROP; | |
498 | handle_res = RX_HANDLER_CONSUMED; | |
ba01877f | 499 | goto out; |
d1dd9119 | 500 | } |
b863ceb7 | 501 | |
e639b8d8 | 502 | *pskb = skb; |
b863ceb7 PM |
503 | skb->dev = dev; |
504 | skb->pkt_type = PACKET_HOST; | |
505 | ||
d1dd9119 | 506 | ret = NET_RX_SUCCESS; |
507 | handle_res = RX_HANDLER_ANOTHER; | |
ba01877f | 508 | out: |
4c979935 | 509 | macvlan_count_rx(vlan, len, ret == NET_RX_SUCCESS, false); |
d1dd9119 | 510 | return handle_res; |
b863ceb7 PM |
511 | } |
512 | ||
618e1b74 AB |
513 | static int macvlan_queue_xmit(struct sk_buff *skb, struct net_device *dev) |
514 | { | |
515 | const struct macvlan_dev *vlan = netdev_priv(dev); | |
516 | const struct macvlan_port *port = vlan->port; | |
517 | const struct macvlan_dev *dest; | |
518 | ||
519 | if (vlan->mode == MACVLAN_MODE_BRIDGE) { | |
d19d68c0 | 520 | const struct ethhdr *eth = skb_eth_hdr(skb); |
618e1b74 AB |
521 | |
522 | /* send to other bridge ports directly */ | |
523 | if (is_multicast_ether_addr(eth->h_dest)) { | |
d19d68c0 | 524 | skb_reset_mac_header(skb); |
618e1b74 AB |
525 | macvlan_broadcast(skb, port, dev, MACVLAN_MODE_BRIDGE); |
526 | goto xmit_world; | |
527 | } | |
528 | ||
529 | dest = macvlan_hash_lookup(port, eth->h_dest); | |
530 | if (dest && dest->mode == MACVLAN_MODE_BRIDGE) { | |
a37dd333 | 531 | /* send to lowerdev first for its network taps */ |
cb2d0f3e | 532 | dev_forward_skb(vlan->lowerdev, skb); |
618e1b74 AB |
533 | |
534 | return NET_XMIT_SUCCESS; | |
535 | } | |
536 | } | |
537 | ||
538 | xmit_world: | |
59b9997b | 539 | skb->dev = vlan->lowerdev; |
618e1b74 AB |
540 | return dev_queue_xmit(skb); |
541 | } | |
542 | ||
688cea83 | 543 | static inline netdev_tx_t macvlan_netpoll_send_skb(struct macvlan_dev *vlan, struct sk_buff *skb) |
544 | { | |
545 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
546 | if (vlan->netpoll) | |
547 | netpoll_send_skb(vlan->netpoll, skb); | |
548 | #else | |
549 | BUG(); | |
550 | #endif | |
551 | return NETDEV_TX_OK; | |
552 | } | |
553 | ||
0db901bd | 554 | static netdev_tx_t macvlan_start_xmit(struct sk_buff *skb, |
555 | struct net_device *dev) | |
b863ceb7 | 556 | { |
b863ceb7 PM |
557 | unsigned int len = skb->len; |
558 | int ret; | |
688cea83 | 559 | struct macvlan_dev *vlan = netdev_priv(dev); |
560 | ||
561 | if (unlikely(netpoll_tx_running(dev))) | |
562 | return macvlan_netpoll_send_skb(vlan, skb); | |
b863ceb7 | 563 | |
a6cc0cfa JF |
564 | if (vlan->fwd_priv) { |
565 | skb->dev = vlan->lowerdev; | |
f663dd9a | 566 | ret = dev_queue_xmit_accel(skb, vlan->fwd_priv); |
a6cc0cfa JF |
567 | } else { |
568 | ret = macvlan_queue_xmit(skb, dev); | |
569 | } | |
570 | ||
2d6c9ffc | 571 | if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) { |
cdf3e274 | 572 | struct vlan_pcpu_stats *pcpu_stats; |
2c114553 | 573 | |
8ffab51b ED |
574 | pcpu_stats = this_cpu_ptr(vlan->pcpu_stats); |
575 | u64_stats_update_begin(&pcpu_stats->syncp); | |
576 | pcpu_stats->tx_packets++; | |
577 | pcpu_stats->tx_bytes += len; | |
578 | u64_stats_update_end(&pcpu_stats->syncp); | |
579 | } else { | |
580 | this_cpu_inc(vlan->pcpu_stats->tx_dropped); | |
581 | } | |
cbbef5e1 | 582 | return ret; |
b863ceb7 PM |
583 | } |
584 | ||
585 | static int macvlan_hard_header(struct sk_buff *skb, struct net_device *dev, | |
3b04ddde SH |
586 | unsigned short type, const void *daddr, |
587 | const void *saddr, unsigned len) | |
b863ceb7 PM |
588 | { |
589 | const struct macvlan_dev *vlan = netdev_priv(dev); | |
590 | struct net_device *lowerdev = vlan->lowerdev; | |
591 | ||
0c4e8581 SH |
592 | return dev_hard_header(skb, lowerdev, type, daddr, |
593 | saddr ? : dev->dev_addr, len); | |
b863ceb7 PM |
594 | } |
595 | ||
3b04ddde SH |
596 | static const struct header_ops macvlan_hard_header_ops = { |
597 | .create = macvlan_hard_header, | |
3b04ddde | 598 | .parse = eth_header_parse, |
3b04ddde SH |
599 | .cache = eth_header_cache, |
600 | .cache_update = eth_header_cache_update, | |
601 | }; | |
602 | ||
b863ceb7 PM |
603 | static int macvlan_open(struct net_device *dev) |
604 | { | |
605 | struct macvlan_dev *vlan = netdev_priv(dev); | |
b863ceb7 PM |
606 | struct net_device *lowerdev = vlan->lowerdev; |
607 | int err; | |
608 | ||
43c2d578 | 609 | if (macvlan_passthru(vlan->port)) { |
78738141 MT |
610 | if (!(vlan->flags & MACVLAN_FLAG_NOPROMISC)) { |
611 | err = dev_set_promiscuity(lowerdev, 1); | |
612 | if (err < 0) | |
613 | goto out; | |
614 | } | |
eb06acdc SS |
615 | goto hash_add; |
616 | } | |
617 | ||
56fd2b2c | 618 | if (lowerdev->features & NETIF_F_HW_L2FW_DOFFLOAD) { |
a6cc0cfa JF |
619 | vlan->fwd_priv = |
620 | lowerdev->netdev_ops->ndo_dfwd_add_station(lowerdev, dev); | |
621 | ||
622 | /* If we get a NULL pointer back, or if we get an error | |
623 | * then we should just fall through to the non accelerated path | |
624 | */ | |
625 | if (IS_ERR_OR_NULL(vlan->fwd_priv)) { | |
626 | vlan->fwd_priv = NULL; | |
f663dd9a | 627 | } else |
a6cc0cfa | 628 | return 0; |
a6cc0cfa JF |
629 | } |
630 | ||
580311e3 | 631 | err = -EADDRINUSE; |
f9ac30f0 EB |
632 | if (macvlan_addr_busy(vlan->port, dev->dev_addr)) |
633 | goto out; | |
634 | ||
a748ee24 | 635 | err = dev_uc_add(lowerdev, dev->dev_addr); |
b863ceb7 | 636 | if (err < 0) |
b89fb7da WC |
637 | goto out; |
638 | if (dev->flags & IFF_ALLMULTI) { | |
639 | err = dev_set_allmulti(lowerdev, 1); | |
640 | if (err < 0) | |
641 | goto del_unicast; | |
642 | } | |
eb06acdc | 643 | |
efdbd2b3 VY |
644 | if (dev->flags & IFF_PROMISC) { |
645 | err = dev_set_promiscuity(lowerdev, 1); | |
646 | if (err < 0) | |
647 | goto clear_multi; | |
648 | } | |
649 | ||
eb06acdc | 650 | hash_add: |
f9ac30f0 | 651 | macvlan_hash_add(vlan); |
b863ceb7 | 652 | return 0; |
b89fb7da | 653 | |
efdbd2b3 | 654 | clear_multi: |
c3891fa2 GF |
655 | if (dev->flags & IFF_ALLMULTI) |
656 | dev_set_allmulti(lowerdev, -1); | |
b89fb7da | 657 | del_unicast: |
a748ee24 | 658 | dev_uc_del(lowerdev, dev->dev_addr); |
b89fb7da | 659 | out: |
a6cc0cfa JF |
660 | if (vlan->fwd_priv) { |
661 | lowerdev->netdev_ops->ndo_dfwd_del_station(lowerdev, | |
662 | vlan->fwd_priv); | |
663 | vlan->fwd_priv = NULL; | |
664 | } | |
b89fb7da | 665 | return err; |
b863ceb7 PM |
666 | } |
667 | ||
668 | static int macvlan_stop(struct net_device *dev) | |
669 | { | |
670 | struct macvlan_dev *vlan = netdev_priv(dev); | |
671 | struct net_device *lowerdev = vlan->lowerdev; | |
672 | ||
a6cc0cfa JF |
673 | if (vlan->fwd_priv) { |
674 | lowerdev->netdev_ops->ndo_dfwd_del_station(lowerdev, | |
675 | vlan->fwd_priv); | |
676 | vlan->fwd_priv = NULL; | |
677 | return 0; | |
678 | } | |
679 | ||
df8ef8f3 JF |
680 | dev_uc_unsync(lowerdev, dev); |
681 | dev_mc_unsync(lowerdev, dev); | |
682 | ||
43c2d578 | 683 | if (macvlan_passthru(vlan->port)) { |
df8ef8f3 JF |
684 | if (!(vlan->flags & MACVLAN_FLAG_NOPROMISC)) |
685 | dev_set_promiscuity(lowerdev, -1); | |
eb06acdc SS |
686 | goto hash_del; |
687 | } | |
688 | ||
b863ceb7 PM |
689 | if (dev->flags & IFF_ALLMULTI) |
690 | dev_set_allmulti(lowerdev, -1); | |
691 | ||
efdbd2b3 VY |
692 | if (dev->flags & IFF_PROMISC) |
693 | dev_set_promiscuity(lowerdev, -1); | |
694 | ||
a748ee24 | 695 | dev_uc_del(lowerdev, dev->dev_addr); |
b863ceb7 | 696 | |
eb06acdc | 697 | hash_del: |
449f4544 | 698 | macvlan_hash_del(vlan, !dev->dismantle); |
b863ceb7 PM |
699 | return 0; |
700 | } | |
701 | ||
e289fd28 | 702 | static int macvlan_sync_address(struct net_device *dev, unsigned char *addr) |
ad5d20a6 PM |
703 | { |
704 | struct macvlan_dev *vlan = netdev_priv(dev); | |
705 | struct net_device *lowerdev = vlan->lowerdev; | |
18c8c54d | 706 | struct macvlan_port *port = vlan->port; |
ad5d20a6 PM |
707 | int err; |
708 | ||
f9ac30f0 EB |
709 | if (!(dev->flags & IFF_UP)) { |
710 | /* Just copy in the new address */ | |
e289fd28 | 711 | ether_addr_copy(dev->dev_addr, addr); |
f9ac30f0 EB |
712 | } else { |
713 | /* Rehash and update the device filters */ | |
e289fd28 | 714 | if (macvlan_addr_busy(vlan->port, addr)) |
580311e3 | 715 | return -EADDRINUSE; |
ad5d20a6 | 716 | |
18c8c54d | 717 | if (!macvlan_passthru(port)) { |
e289fd28 | 718 | err = dev_uc_add(lowerdev, addr); |
719 | if (err) | |
720 | return err; | |
ad5d20a6 | 721 | |
e289fd28 | 722 | dev_uc_del(lowerdev, dev->dev_addr); |
723 | } | |
f9ac30f0 | 724 | |
e289fd28 | 725 | macvlan_hash_change_addr(vlan, addr); |
f9ac30f0 | 726 | } |
18c8c54d VY |
727 | if (macvlan_passthru(port) && !macvlan_addr_change(port)) { |
728 | /* Since addr_change isn't set, we are here due to lower | |
729 | * device change. Save the lower-dev address so we can | |
730 | * restore it later. | |
731 | */ | |
732 | ether_addr_copy(vlan->port->perm_addr, | |
733 | lowerdev->dev_addr); | |
734 | } | |
735 | macvlan_clear_addr_change(port); | |
ad5d20a6 PM |
736 | return 0; |
737 | } | |
738 | ||
e289fd28 | 739 | static int macvlan_set_mac_address(struct net_device *dev, void *p) |
740 | { | |
741 | struct macvlan_dev *vlan = netdev_priv(dev); | |
742 | struct sockaddr *addr = p; | |
743 | ||
744 | if (!is_valid_ether_addr(addr->sa_data)) | |
745 | return -EADDRNOTAVAIL; | |
746 | ||
e26f43fa VY |
747 | /* If the addresses are the same, this is a no-op */ |
748 | if (ether_addr_equal(dev->dev_addr, addr->sa_data)) | |
749 | return 0; | |
750 | ||
e289fd28 | 751 | if (vlan->mode == MACVLAN_MODE_PASSTHRU) { |
18c8c54d | 752 | macvlan_set_addr_change(vlan->port); |
a88e2676 | 753 | return dev_set_mac_address(vlan->lowerdev, addr); |
e289fd28 | 754 | } |
755 | ||
580311e3 MC |
756 | if (macvlan_addr_busy(vlan->port, addr->sa_data)) |
757 | return -EADDRINUSE; | |
758 | ||
e289fd28 | 759 | return macvlan_sync_address(dev, addr->sa_data); |
760 | } | |
761 | ||
b863ceb7 PM |
762 | static void macvlan_change_rx_flags(struct net_device *dev, int change) |
763 | { | |
764 | struct macvlan_dev *vlan = netdev_priv(dev); | |
765 | struct net_device *lowerdev = vlan->lowerdev; | |
766 | ||
bbeb0ead PC |
767 | if (dev->flags & IFF_UP) { |
768 | if (change & IFF_ALLMULTI) | |
769 | dev_set_allmulti(lowerdev, dev->flags & IFF_ALLMULTI ? 1 : -1); | |
efdbd2b3 VY |
770 | if (change & IFF_PROMISC) |
771 | dev_set_promiscuity(lowerdev, | |
772 | dev->flags & IFF_PROMISC ? 1 : -1); | |
773 | ||
bbeb0ead | 774 | } |
b863ceb7 PM |
775 | } |
776 | ||
9c127a01 HX |
777 | static void macvlan_compute_filter(unsigned long *mc_filter, |
778 | struct net_device *dev, | |
779 | struct macvlan_dev *vlan) | |
b863ceb7 | 780 | { |
cd431e73 | 781 | if (dev->flags & (IFF_PROMISC | IFF_ALLMULTI)) { |
9c127a01 | 782 | bitmap_fill(mc_filter, MACVLAN_MC_FILTER_SZ); |
cd431e73 ED |
783 | } else { |
784 | struct netdev_hw_addr *ha; | |
785 | DECLARE_BITMAP(filter, MACVLAN_MC_FILTER_SZ); | |
786 | ||
787 | bitmap_zero(filter, MACVLAN_MC_FILTER_SZ); | |
788 | netdev_for_each_mc_addr(ha, dev) { | |
3807ff58 | 789 | __set_bit(mc_hash(vlan, ha->addr), filter); |
cd431e73 | 790 | } |
d5270430 | 791 | |
3807ff58 | 792 | __set_bit(mc_hash(vlan, dev->broadcast), filter); |
d5270430 | 793 | |
9c127a01 | 794 | bitmap_copy(mc_filter, filter, MACVLAN_MC_FILTER_SZ); |
cd431e73 | 795 | } |
9c127a01 HX |
796 | } |
797 | ||
798 | static void macvlan_set_mac_lists(struct net_device *dev) | |
799 | { | |
800 | struct macvlan_dev *vlan = netdev_priv(dev); | |
801 | ||
802 | macvlan_compute_filter(vlan->mc_filter, dev, vlan); | |
803 | ||
df8ef8f3 | 804 | dev_uc_sync(vlan->lowerdev, dev); |
b863ceb7 | 805 | dev_mc_sync(vlan->lowerdev, dev); |
9c127a01 HX |
806 | |
807 | /* This is slightly inaccurate as we're including the subscription | |
808 | * list of vlan->lowerdev too. | |
809 | * | |
810 | * Bug alert: This only works if everyone has the same broadcast | |
811 | * address as lowerdev. As soon as someone changes theirs this | |
812 | * will break. | |
813 | * | |
814 | * However, this is already broken as when you change your broadcast | |
815 | * address we don't get called. | |
816 | * | |
817 | * The solution is to maintain a list of broadcast addresses like | |
818 | * we do for uc/mc, if you care. | |
819 | */ | |
820 | macvlan_compute_filter(vlan->port->mc_filter, vlan->lowerdev, NULL); | |
b863ceb7 PM |
821 | } |
822 | ||
823 | static int macvlan_change_mtu(struct net_device *dev, int new_mtu) | |
824 | { | |
825 | struct macvlan_dev *vlan = netdev_priv(dev); | |
826 | ||
91572088 | 827 | if (vlan->lowerdev->mtu < new_mtu) |
b863ceb7 PM |
828 | return -EINVAL; |
829 | dev->mtu = new_mtu; | |
830 | return 0; | |
831 | } | |
832 | ||
833 | /* | |
834 | * macvlan network devices have devices nesting below it and are a special | |
835 | * "super class" of normal network devices; split their locks off into a | |
836 | * separate class since they always nest. | |
837 | */ | |
cf508b12 | 838 | static struct lock_class_key macvlan_netdev_addr_lock_key; |
b863ceb7 | 839 | |
70957eae VY |
840 | #define ALWAYS_ON_OFFLOADS \ |
841 | (NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_GSO_SOFTWARE | \ | |
f21e5077 | 842 | NETIF_F_GSO_ROBUST | NETIF_F_GSO_ENCAP_ALL) |
8b4703e9 | 843 | |
70957eae VY |
844 | #define ALWAYS_ON_FEATURES (ALWAYS_ON_OFFLOADS | NETIF_F_LLTX) |
845 | ||
b863ceb7 | 846 | #define MACVLAN_FEATURES \ |
a188222b | 847 | (NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST | \ |
fb652fdf | 848 | NETIF_F_GSO | NETIF_F_TSO | NETIF_F_LRO | \ |
8d13e670 | 849 | NETIF_F_TSO_ECN | NETIF_F_TSO6 | NETIF_F_GRO | NETIF_F_RXCSUM | \ |
28d2b136 | 850 | NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_HW_VLAN_STAG_FILTER) |
b863ceb7 PM |
851 | |
852 | #define MACVLAN_STATE_MASK \ | |
853 | ((1<<__LINK_STATE_NOCARRIER) | (1<<__LINK_STATE_DORMANT)) | |
854 | ||
c674ac30 VY |
855 | static int macvlan_get_nest_level(struct net_device *dev) |
856 | { | |
857 | return ((struct macvlan_dev *)netdev_priv(dev))->nest_level; | |
858 | } | |
859 | ||
c773e847 DM |
860 | static void macvlan_set_lockdep_class(struct net_device *dev) |
861 | { | |
24ffd752 | 862 | netdev_lockdep_set_classes(dev); |
c674ac30 VY |
863 | lockdep_set_class_and_subclass(&dev->addr_list_lock, |
864 | &macvlan_netdev_addr_lock_key, | |
865 | macvlan_get_nest_level(dev)); | |
c773e847 DM |
866 | } |
867 | ||
b863ceb7 PM |
868 | static int macvlan_init(struct net_device *dev) |
869 | { | |
870 | struct macvlan_dev *vlan = netdev_priv(dev); | |
871 | const struct net_device *lowerdev = vlan->lowerdev; | |
30837960 | 872 | struct macvlan_port *port = vlan->port; |
b863ceb7 PM |
873 | |
874 | dev->state = (dev->state & ~MACVLAN_STATE_MASK) | | |
875 | (lowerdev->state & MACVLAN_STATE_MASK); | |
876 | dev->features = lowerdev->features & MACVLAN_FEATURES; | |
8b4703e9 | 877 | dev->features |= ALWAYS_ON_FEATURES; |
62dbe830 | 878 | dev->hw_features |= NETIF_F_LRO; |
081e83a7 | 879 | dev->vlan_features = lowerdev->vlan_features & MACVLAN_FEATURES; |
70957eae | 880 | dev->vlan_features |= ALWAYS_ON_OFFLOADS; |
f21e5077 | 881 | dev->hw_enc_features |= dev->features; |
8c2acc53 | 882 | dev->gso_max_size = lowerdev->gso_max_size; |
f6773c5e | 883 | dev->gso_max_segs = lowerdev->gso_max_segs; |
ef5c8996 | 884 | dev->hard_header_len = lowerdev->hard_header_len; |
b863ceb7 | 885 | |
c773e847 DM |
886 | macvlan_set_lockdep_class(dev); |
887 | ||
1c213bd2 | 888 | vlan->pcpu_stats = netdev_alloc_pcpu_stats(struct vlan_pcpu_stats); |
8ffab51b | 889 | if (!vlan->pcpu_stats) |
fccaf710 ED |
890 | return -ENOMEM; |
891 | ||
30837960 FR |
892 | port->count += 1; |
893 | ||
b863ceb7 PM |
894 | return 0; |
895 | } | |
896 | ||
fccaf710 ED |
897 | static void macvlan_uninit(struct net_device *dev) |
898 | { | |
899 | struct macvlan_dev *vlan = netdev_priv(dev); | |
d5cd9244 | 900 | struct macvlan_port *port = vlan->port; |
fccaf710 | 901 | |
8ffab51b | 902 | free_percpu(vlan->pcpu_stats); |
d5cd9244 | 903 | |
79cf79ab | 904 | macvlan_flush_sources(port, vlan); |
5e3c516b DM |
905 | port->count -= 1; |
906 | if (!port->count) | |
d5cd9244 | 907 | macvlan_port_destroy(port->dev); |
fccaf710 ED |
908 | } |
909 | ||
bc1f4470 | 910 | static void macvlan_dev_get_stats64(struct net_device *dev, |
911 | struct rtnl_link_stats64 *stats) | |
fccaf710 | 912 | { |
fccaf710 ED |
913 | struct macvlan_dev *vlan = netdev_priv(dev); |
914 | ||
8ffab51b | 915 | if (vlan->pcpu_stats) { |
cdf3e274 | 916 | struct vlan_pcpu_stats *p; |
8ffab51b ED |
917 | u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes; |
918 | u32 rx_errors = 0, tx_dropped = 0; | |
bc66154e | 919 | unsigned int start; |
fccaf710 ED |
920 | int i; |
921 | ||
922 | for_each_possible_cpu(i) { | |
8ffab51b | 923 | p = per_cpu_ptr(vlan->pcpu_stats, i); |
bc66154e | 924 | do { |
57a7744e | 925 | start = u64_stats_fetch_begin_irq(&p->syncp); |
bc66154e ED |
926 | rx_packets = p->rx_packets; |
927 | rx_bytes = p->rx_bytes; | |
928 | rx_multicast = p->rx_multicast; | |
8ffab51b ED |
929 | tx_packets = p->tx_packets; |
930 | tx_bytes = p->tx_bytes; | |
57a7744e | 931 | } while (u64_stats_fetch_retry_irq(&p->syncp, start)); |
8ffab51b ED |
932 | |
933 | stats->rx_packets += rx_packets; | |
934 | stats->rx_bytes += rx_bytes; | |
935 | stats->multicast += rx_multicast; | |
936 | stats->tx_packets += tx_packets; | |
937 | stats->tx_bytes += tx_bytes; | |
938 | /* rx_errors & tx_dropped are u32, updated | |
939 | * without syncp protection. | |
940 | */ | |
941 | rx_errors += p->rx_errors; | |
942 | tx_dropped += p->tx_dropped; | |
fccaf710 | 943 | } |
8ffab51b ED |
944 | stats->rx_errors = rx_errors; |
945 | stats->rx_dropped = rx_errors; | |
946 | stats->tx_dropped = tx_dropped; | |
fccaf710 | 947 | } |
fccaf710 ED |
948 | } |
949 | ||
8e586137 | 950 | static int macvlan_vlan_rx_add_vid(struct net_device *dev, |
80d5c368 | 951 | __be16 proto, u16 vid) |
8d13e670 JF |
952 | { |
953 | struct macvlan_dev *vlan = netdev_priv(dev); | |
954 | struct net_device *lowerdev = vlan->lowerdev; | |
8d13e670 | 955 | |
80d5c368 | 956 | return vlan_vid_add(lowerdev, proto, vid); |
8d13e670 JF |
957 | } |
958 | ||
8e586137 | 959 | static int macvlan_vlan_rx_kill_vid(struct net_device *dev, |
80d5c368 | 960 | __be16 proto, u16 vid) |
8d13e670 JF |
961 | { |
962 | struct macvlan_dev *vlan = netdev_priv(dev); | |
963 | struct net_device *lowerdev = vlan->lowerdev; | |
8d13e670 | 964 | |
80d5c368 | 965 | vlan_vid_del(lowerdev, proto, vid); |
8e586137 | 966 | return 0; |
8d13e670 JF |
967 | } |
968 | ||
edc7d573 | 969 | static int macvlan_fdb_add(struct ndmsg *ndm, struct nlattr *tb[], |
df8ef8f3 | 970 | struct net_device *dev, |
f6f6424b | 971 | const unsigned char *addr, u16 vid, |
df8ef8f3 JF |
972 | u16 flags) |
973 | { | |
974 | struct macvlan_dev *vlan = netdev_priv(dev); | |
975 | int err = -EINVAL; | |
976 | ||
8a50f11c VY |
977 | /* Support unicast filter only on passthru devices. |
978 | * Multicast filter should be allowed on all devices. | |
979 | */ | |
43c2d578 | 980 | if (!macvlan_passthru(vlan->port) && is_unicast_ether_addr(addr)) |
df8ef8f3 JF |
981 | return -EOPNOTSUPP; |
982 | ||
ab2cfbb2 TR |
983 | if (flags & NLM_F_REPLACE) |
984 | return -EOPNOTSUPP; | |
985 | ||
df8ef8f3 JF |
986 | if (is_unicast_ether_addr(addr)) |
987 | err = dev_uc_add_excl(dev, addr); | |
988 | else if (is_multicast_ether_addr(addr)) | |
989 | err = dev_mc_add_excl(dev, addr); | |
990 | ||
991 | return err; | |
992 | } | |
993 | ||
1690be63 | 994 | static int macvlan_fdb_del(struct ndmsg *ndm, struct nlattr *tb[], |
df8ef8f3 | 995 | struct net_device *dev, |
f6f6424b | 996 | const unsigned char *addr, u16 vid) |
df8ef8f3 JF |
997 | { |
998 | struct macvlan_dev *vlan = netdev_priv(dev); | |
999 | int err = -EINVAL; | |
1000 | ||
8a50f11c VY |
1001 | /* Support unicast filter only on passthru devices. |
1002 | * Multicast filter should be allowed on all devices. | |
1003 | */ | |
43c2d578 | 1004 | if (!macvlan_passthru(vlan->port) && is_unicast_ether_addr(addr)) |
df8ef8f3 JF |
1005 | return -EOPNOTSUPP; |
1006 | ||
1007 | if (is_unicast_ether_addr(addr)) | |
1008 | err = dev_uc_del(dev, addr); | |
1009 | else if (is_multicast_ether_addr(addr)) | |
1010 | err = dev_mc_del(dev, addr); | |
1011 | ||
1012 | return err; | |
1013 | } | |
1014 | ||
b863ceb7 PM |
1015 | static void macvlan_ethtool_get_drvinfo(struct net_device *dev, |
1016 | struct ethtool_drvinfo *drvinfo) | |
1017 | { | |
7826d43f JP |
1018 | strlcpy(drvinfo->driver, "macvlan", sizeof(drvinfo->driver)); |
1019 | strlcpy(drvinfo->version, "0.1", sizeof(drvinfo->version)); | |
b863ceb7 PM |
1020 | } |
1021 | ||
85f95819 DD |
1022 | static int macvlan_ethtool_get_link_ksettings(struct net_device *dev, |
1023 | struct ethtool_link_ksettings *cmd) | |
9edb8bb6 SH |
1024 | { |
1025 | const struct macvlan_dev *vlan = netdev_priv(dev); | |
4bc71cb9 | 1026 | |
85f95819 | 1027 | return __ethtool_get_link_ksettings(vlan->lowerdev, cmd); |
9edb8bb6 SH |
1028 | } |
1029 | ||
2be5c767 VY |
1030 | static netdev_features_t macvlan_fix_features(struct net_device *dev, |
1031 | netdev_features_t features) | |
1032 | { | |
1033 | struct macvlan_dev *vlan = netdev_priv(dev); | |
62dbe830 | 1034 | netdev_features_t lowerdev_features = vlan->lowerdev->features; |
797f87f8 | 1035 | netdev_features_t mask; |
2be5c767 | 1036 | |
797f87f8 FW |
1037 | features |= NETIF_F_ALL_FOR_ALL; |
1038 | features &= (vlan->set_features | ~MACVLAN_FEATURES); | |
1039 | mask = features; | |
1040 | ||
62dbe830 MK |
1041 | lowerdev_features &= (features | ~NETIF_F_LRO); |
1042 | features = netdev_increment_features(lowerdev_features, features, mask); | |
8b4703e9 | 1043 | features |= ALWAYS_ON_FEATURES; |
37e70a4f | 1044 | features &= (ALWAYS_ON_FEATURES | MACVLAN_FEATURES); |
797f87f8 FW |
1045 | |
1046 | return features; | |
2be5c767 VY |
1047 | } |
1048 | ||
688cea83 | 1049 | #ifdef CONFIG_NET_POLL_CONTROLLER |
1050 | static void macvlan_dev_poll_controller(struct net_device *dev) | |
1051 | { | |
1052 | return; | |
1053 | } | |
1054 | ||
1055 | static int macvlan_dev_netpoll_setup(struct net_device *dev, struct netpoll_info *npinfo) | |
1056 | { | |
1057 | struct macvlan_dev *vlan = netdev_priv(dev); | |
1058 | struct net_device *real_dev = vlan->lowerdev; | |
1059 | struct netpoll *netpoll; | |
1060 | int err = 0; | |
1061 | ||
1062 | netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL); | |
1063 | err = -ENOMEM; | |
1064 | if (!netpoll) | |
1065 | goto out; | |
1066 | ||
1067 | err = __netpoll_setup(netpoll, real_dev); | |
1068 | if (err) { | |
1069 | kfree(netpoll); | |
1070 | goto out; | |
1071 | } | |
1072 | ||
1073 | vlan->netpoll = netpoll; | |
1074 | ||
1075 | out: | |
1076 | return err; | |
1077 | } | |
1078 | ||
1079 | static void macvlan_dev_netpoll_cleanup(struct net_device *dev) | |
1080 | { | |
1081 | struct macvlan_dev *vlan = netdev_priv(dev); | |
1082 | struct netpoll *netpoll = vlan->netpoll; | |
1083 | ||
1084 | if (!netpoll) | |
1085 | return; | |
1086 | ||
1087 | vlan->netpoll = NULL; | |
1088 | ||
1089 | __netpoll_free_async(netpoll); | |
1090 | } | |
1091 | #endif /* CONFIG_NET_POLL_CONTROLLER */ | |
1092 | ||
ef5fa6bc ND |
1093 | static int macvlan_dev_get_iflink(const struct net_device *dev) |
1094 | { | |
1095 | struct macvlan_dev *vlan = netdev_priv(dev); | |
1096 | ||
1097 | return vlan->lowerdev->ifindex; | |
1098 | } | |
1099 | ||
b863ceb7 PM |
1100 | static const struct ethtool_ops macvlan_ethtool_ops = { |
1101 | .get_link = ethtool_op_get_link, | |
85f95819 | 1102 | .get_link_ksettings = macvlan_ethtool_get_link_ksettings, |
b863ceb7 PM |
1103 | .get_drvinfo = macvlan_ethtool_get_drvinfo, |
1104 | }; | |
1105 | ||
54a30c97 SH |
1106 | static const struct net_device_ops macvlan_netdev_ops = { |
1107 | .ndo_init = macvlan_init, | |
fccaf710 | 1108 | .ndo_uninit = macvlan_uninit, |
54a30c97 SH |
1109 | .ndo_open = macvlan_open, |
1110 | .ndo_stop = macvlan_stop, | |
00829823 | 1111 | .ndo_start_xmit = macvlan_start_xmit, |
54a30c97 | 1112 | .ndo_change_mtu = macvlan_change_mtu, |
2be5c767 | 1113 | .ndo_fix_features = macvlan_fix_features, |
54a30c97 SH |
1114 | .ndo_change_rx_flags = macvlan_change_rx_flags, |
1115 | .ndo_set_mac_address = macvlan_set_mac_address, | |
df8ef8f3 | 1116 | .ndo_set_rx_mode = macvlan_set_mac_lists, |
bc66154e | 1117 | .ndo_get_stats64 = macvlan_dev_get_stats64, |
54a30c97 | 1118 | .ndo_validate_addr = eth_validate_addr, |
8d13e670 JF |
1119 | .ndo_vlan_rx_add_vid = macvlan_vlan_rx_add_vid, |
1120 | .ndo_vlan_rx_kill_vid = macvlan_vlan_rx_kill_vid, | |
df8ef8f3 JF |
1121 | .ndo_fdb_add = macvlan_fdb_add, |
1122 | .ndo_fdb_del = macvlan_fdb_del, | |
1123 | .ndo_fdb_dump = ndo_dflt_fdb_dump, | |
c674ac30 | 1124 | .ndo_get_lock_subclass = macvlan_get_nest_level, |
688cea83 | 1125 | #ifdef CONFIG_NET_POLL_CONTROLLER |
1126 | .ndo_poll_controller = macvlan_dev_poll_controller, | |
1127 | .ndo_netpoll_setup = macvlan_dev_netpoll_setup, | |
1128 | .ndo_netpoll_cleanup = macvlan_dev_netpoll_cleanup, | |
1129 | #endif | |
ef5fa6bc | 1130 | .ndo_get_iflink = macvlan_dev_get_iflink, |
f56e67b5 | 1131 | .ndo_features_check = passthru_features_check, |
54a30c97 SH |
1132 | }; |
1133 | ||
8a35747a | 1134 | void macvlan_common_setup(struct net_device *dev) |
b863ceb7 PM |
1135 | { |
1136 | ether_setup(dev); | |
1137 | ||
91572088 JW |
1138 | dev->min_mtu = 0; |
1139 | dev->max_mtu = ETH_MAX_MTU; | |
02875878 ED |
1140 | dev->priv_flags &= ~IFF_TX_SKB_SHARING; |
1141 | netif_keep_dst(dev); | |
87ab7f6f | 1142 | dev->priv_flags |= IFF_UNICAST_FLT; |
54a30c97 | 1143 | dev->netdev_ops = &macvlan_netdev_ops; |
cf124db5 | 1144 | dev->needs_free_netdev = true; |
71740129 | 1145 | dev->header_ops = &macvlan_hard_header_ops; |
b863ceb7 | 1146 | dev->ethtool_ops = &macvlan_ethtool_ops; |
8a35747a HX |
1147 | } |
1148 | EXPORT_SYMBOL_GPL(macvlan_common_setup); | |
1149 | ||
1150 | static void macvlan_setup(struct net_device *dev) | |
1151 | { | |
1152 | macvlan_common_setup(dev); | |
7009212b | 1153 | dev->priv_flags |= IFF_NO_QUEUE; |
b863ceb7 PM |
1154 | } |
1155 | ||
1156 | static int macvlan_port_create(struct net_device *dev) | |
1157 | { | |
1158 | struct macvlan_port *port; | |
1159 | unsigned int i; | |
ab95bfe0 | 1160 | int err; |
b863ceb7 PM |
1161 | |
1162 | if (dev->type != ARPHRD_ETHER || dev->flags & IFF_LOOPBACK) | |
1163 | return -EINVAL; | |
1164 | ||
322dc6e0 | 1165 | if (netdev_is_rx_handler_busy(dev)) |
d6b00fec MB |
1166 | return -EBUSY; |
1167 | ||
b863ceb7 PM |
1168 | port = kzalloc(sizeof(*port), GFP_KERNEL); |
1169 | if (port == NULL) | |
1170 | return -ENOMEM; | |
1171 | ||
1172 | port->dev = dev; | |
18c8c54d | 1173 | ether_addr_copy(port->perm_addr, dev->dev_addr); |
b863ceb7 PM |
1174 | INIT_LIST_HEAD(&port->vlans); |
1175 | for (i = 0; i < MACVLAN_HASH_SIZE; i++) | |
1176 | INIT_HLIST_HEAD(&port->vlan_hash[i]); | |
79cf79ab MB |
1177 | for (i = 0; i < MACVLAN_HASH_SIZE; i++) |
1178 | INIT_HLIST_HEAD(&port->vlan_source_hash[i]); | |
ab95bfe0 | 1179 | |
412ca155 HX |
1180 | skb_queue_head_init(&port->bc_queue); |
1181 | INIT_WORK(&port->bc_work, macvlan_process_broadcast); | |
1182 | ||
a35e2c1b JP |
1183 | err = netdev_rx_handler_register(dev, macvlan_handle_frame, port); |
1184 | if (err) | |
ab95bfe0 | 1185 | kfree(port); |
d9351561 ED |
1186 | else |
1187 | dev->priv_flags |= IFF_MACVLAN_PORT; | |
ab95bfe0 | 1188 | return err; |
b863ceb7 PM |
1189 | } |
1190 | ||
1191 | static void macvlan_port_destroy(struct net_device *dev) | |
1192 | { | |
e052f7e6 | 1193 | struct macvlan_port *port = macvlan_port_get_rtnl(dev); |
f6478218 | 1194 | struct sk_buff *skb; |
b863ceb7 | 1195 | |
a35e2c1b | 1196 | dev->priv_flags &= ~IFF_MACVLAN_PORT; |
ab95bfe0 | 1197 | netdev_rx_handler_unregister(dev); |
fe0ca732 ED |
1198 | |
1199 | /* After this point, no packet can schedule bc_work anymore, | |
1200 | * but we need to cancel it and purge left skbs if any. | |
1201 | */ | |
1202 | cancel_work_sync(&port->bc_work); | |
f6478218 HX |
1203 | |
1204 | while ((skb = __skb_dequeue(&port->bc_queue))) { | |
1205 | const struct macvlan_dev *src = MACVLAN_SKB_CB(skb)->src; | |
1206 | ||
1207 | if (src) | |
1208 | dev_put(src->dev); | |
1209 | ||
1210 | kfree_skb(skb); | |
1211 | } | |
fe0ca732 | 1212 | |
18c8c54d VY |
1213 | /* If the lower device address has been changed by passthru |
1214 | * macvlan, put it back. | |
1215 | */ | |
1216 | if (macvlan_passthru(port) && | |
1217 | !ether_addr_equal(port->dev->dev_addr, port->perm_addr)) { | |
1218 | struct sockaddr sa; | |
1219 | ||
1220 | sa.sa_family = port->dev->type; | |
1221 | memcpy(&sa.sa_data, port->perm_addr, port->dev->addr_len); | |
1222 | dev_set_mac_address(port->dev, &sa); | |
1223 | } | |
1224 | ||
a1f5315c | 1225 | kfree(port); |
b863ceb7 PM |
1226 | } |
1227 | ||
a8b8a889 MS |
1228 | static int macvlan_validate(struct nlattr *tb[], struct nlattr *data[], |
1229 | struct netlink_ext_ack *extack) | |
b863ceb7 PM |
1230 | { |
1231 | if (tb[IFLA_ADDRESS]) { | |
1232 | if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) | |
1233 | return -EINVAL; | |
1234 | if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) | |
1235 | return -EADDRNOTAVAIL; | |
1236 | } | |
27c0b1a8 | 1237 | |
07850a4f ZS |
1238 | if (!data) |
1239 | return 0; | |
1240 | ||
1241 | if (data[IFLA_MACVLAN_FLAGS] && | |
15127478 MT |
1242 | nla_get_u16(data[IFLA_MACVLAN_FLAGS]) & ~MACVLAN_FLAG_NOPROMISC) |
1243 | return -EINVAL; | |
1244 | ||
07850a4f | 1245 | if (data[IFLA_MACVLAN_MODE]) { |
27c0b1a8 AB |
1246 | switch (nla_get_u32(data[IFLA_MACVLAN_MODE])) { |
1247 | case MACVLAN_MODE_PRIVATE: | |
1248 | case MACVLAN_MODE_VEPA: | |
1249 | case MACVLAN_MODE_BRIDGE: | |
eb06acdc | 1250 | case MACVLAN_MODE_PASSTHRU: |
79cf79ab MB |
1251 | case MACVLAN_MODE_SOURCE: |
1252 | break; | |
1253 | default: | |
1254 | return -EINVAL; | |
1255 | } | |
1256 | } | |
1257 | ||
07850a4f | 1258 | if (data[IFLA_MACVLAN_MACADDR_MODE]) { |
79cf79ab MB |
1259 | switch (nla_get_u32(data[IFLA_MACVLAN_MACADDR_MODE])) { |
1260 | case MACVLAN_MACADDR_ADD: | |
1261 | case MACVLAN_MACADDR_DEL: | |
1262 | case MACVLAN_MACADDR_FLUSH: | |
1263 | case MACVLAN_MACADDR_SET: | |
27c0b1a8 AB |
1264 | break; |
1265 | default: | |
1266 | return -EINVAL; | |
1267 | } | |
1268 | } | |
79cf79ab | 1269 | |
07850a4f | 1270 | if (data[IFLA_MACVLAN_MACADDR]) { |
79cf79ab MB |
1271 | if (nla_len(data[IFLA_MACVLAN_MACADDR]) != ETH_ALEN) |
1272 | return -EINVAL; | |
1273 | ||
1274 | if (!is_valid_ether_addr(nla_data(data[IFLA_MACVLAN_MACADDR]))) | |
1275 | return -EADDRNOTAVAIL; | |
1276 | } | |
1277 | ||
07850a4f | 1278 | if (data[IFLA_MACVLAN_MACADDR_COUNT]) |
79cf79ab MB |
1279 | return -EINVAL; |
1280 | ||
1281 | return 0; | |
1282 | } | |
1283 | ||
1284 | /** | |
1285 | * reconfigure list of remote source mac address | |
1286 | * (only for macvlan devices in source mode) | |
1287 | * Note regarding alignment: all netlink data is aligned to 4 Byte, which | |
1288 | * suffices for both ether_addr_copy and ether_addr_equal_64bits usage. | |
1289 | */ | |
1290 | static int macvlan_changelink_sources(struct macvlan_dev *vlan, u32 mode, | |
1291 | struct nlattr *data[]) | |
1292 | { | |
1293 | char *addr = NULL; | |
1294 | int ret, rem, len; | |
1295 | struct nlattr *nla, *head; | |
1296 | struct macvlan_source_entry *entry; | |
1297 | ||
1298 | if (data[IFLA_MACVLAN_MACADDR]) | |
1299 | addr = nla_data(data[IFLA_MACVLAN_MACADDR]); | |
1300 | ||
1301 | if (mode == MACVLAN_MACADDR_ADD) { | |
1302 | if (!addr) | |
1303 | return -EINVAL; | |
1304 | ||
1305 | return macvlan_hash_add_source(vlan, addr); | |
1306 | ||
1307 | } else if (mode == MACVLAN_MACADDR_DEL) { | |
1308 | if (!addr) | |
1309 | return -EINVAL; | |
1310 | ||
1311 | entry = macvlan_hash_lookup_source(vlan, addr); | |
1312 | if (entry) { | |
1313 | macvlan_hash_del_source(entry); | |
1314 | vlan->macaddr_count--; | |
1315 | } | |
1316 | } else if (mode == MACVLAN_MACADDR_FLUSH) { | |
1317 | macvlan_flush_sources(vlan->port, vlan); | |
1318 | } else if (mode == MACVLAN_MACADDR_SET) { | |
1319 | macvlan_flush_sources(vlan->port, vlan); | |
1320 | ||
1321 | if (addr) { | |
1322 | ret = macvlan_hash_add_source(vlan, addr); | |
1323 | if (ret) | |
1324 | return ret; | |
1325 | } | |
1326 | ||
1327 | if (!data || !data[IFLA_MACVLAN_MACADDR_DATA]) | |
1328 | return 0; | |
1329 | ||
1330 | head = nla_data(data[IFLA_MACVLAN_MACADDR_DATA]); | |
1331 | len = nla_len(data[IFLA_MACVLAN_MACADDR_DATA]); | |
1332 | ||
1333 | nla_for_each_attr(nla, head, len, rem) { | |
1334 | if (nla_type(nla) != IFLA_MACVLAN_MACADDR || | |
1335 | nla_len(nla) != ETH_ALEN) | |
1336 | continue; | |
1337 | ||
1338 | addr = nla_data(nla); | |
1339 | ret = macvlan_hash_add_source(vlan, addr); | |
1340 | if (ret) | |
1341 | return ret; | |
1342 | } | |
1343 | } else { | |
1344 | return -EINVAL; | |
1345 | } | |
1346 | ||
b863ceb7 PM |
1347 | return 0; |
1348 | } | |
1349 | ||
fc0663d6 | 1350 | int macvlan_common_newlink(struct net *src_net, struct net_device *dev, |
42ab19ee DA |
1351 | struct nlattr *tb[], struct nlattr *data[], |
1352 | struct netlink_ext_ack *extack) | |
b863ceb7 PM |
1353 | { |
1354 | struct macvlan_dev *vlan = netdev_priv(dev); | |
1355 | struct macvlan_port *port; | |
1356 | struct net_device *lowerdev; | |
1357 | int err; | |
79cf79ab | 1358 | int macmode; |
aa5fd0fb | 1359 | bool create = false; |
b863ceb7 PM |
1360 | |
1361 | if (!tb[IFLA_LINK]) | |
1362 | return -EINVAL; | |
1363 | ||
81adee47 | 1364 | lowerdev = __dev_get_by_index(src_net, nla_get_u32(tb[IFLA_LINK])); |
b863ceb7 PM |
1365 | if (lowerdev == NULL) |
1366 | return -ENODEV; | |
1367 | ||
d70f2cf5 | 1368 | /* When creating macvlans or macvtaps on top of other macvlans - use |
b0832a29 | 1369 | * the real device as the lowerdev. |
a6ca5f1d | 1370 | */ |
d70f2cf5 KW |
1371 | if (netif_is_macvlan(lowerdev)) |
1372 | lowerdev = macvlan_dev_real_dev(lowerdev); | |
a6ca5f1d | 1373 | |
b863ceb7 PM |
1374 | if (!tb[IFLA_MTU]) |
1375 | dev->mtu = lowerdev->mtu; | |
1376 | else if (dev->mtu > lowerdev->mtu) | |
1377 | return -EINVAL; | |
1378 | ||
91572088 JW |
1379 | /* MTU range: 68 - lowerdev->max_mtu */ |
1380 | dev->min_mtu = ETH_MIN_MTU; | |
1381 | dev->max_mtu = lowerdev->max_mtu; | |
1382 | ||
b863ceb7 | 1383 | if (!tb[IFLA_ADDRESS]) |
7ce5d222 | 1384 | eth_hw_addr_random(dev); |
b863ceb7 | 1385 | |
a35e2c1b | 1386 | if (!macvlan_port_exists(lowerdev)) { |
b863ceb7 PM |
1387 | err = macvlan_port_create(lowerdev); |
1388 | if (err < 0) | |
1389 | return err; | |
aa5fd0fb | 1390 | create = true; |
b863ceb7 | 1391 | } |
e052f7e6 | 1392 | port = macvlan_port_get_rtnl(lowerdev); |
b863ceb7 | 1393 | |
eb06acdc | 1394 | /* Only 1 macvlan device can be created in passthru mode */ |
43c2d578 | 1395 | if (macvlan_passthru(port)) { |
aa5fd0fb GF |
1396 | /* The macvlan port must be not created this time, |
1397 | * still goto destroy_macvlan_port for readability. | |
1398 | */ | |
1399 | err = -EINVAL; | |
1400 | goto destroy_macvlan_port; | |
1401 | } | |
eb06acdc | 1402 | |
b863ceb7 PM |
1403 | vlan->lowerdev = lowerdev; |
1404 | vlan->dev = dev; | |
1405 | vlan->port = port; | |
2be5c767 | 1406 | vlan->set_features = MACVLAN_FEATURES; |
952fcfd0 | 1407 | vlan->nest_level = dev_get_nest_level(lowerdev) + 1; |
b863ceb7 | 1408 | |
27c0b1a8 AB |
1409 | vlan->mode = MACVLAN_MODE_VEPA; |
1410 | if (data && data[IFLA_MACVLAN_MODE]) | |
1411 | vlan->mode = nla_get_u32(data[IFLA_MACVLAN_MODE]); | |
1412 | ||
df8ef8f3 JF |
1413 | if (data && data[IFLA_MACVLAN_FLAGS]) |
1414 | vlan->flags = nla_get_u16(data[IFLA_MACVLAN_FLAGS]); | |
1415 | ||
eb06acdc | 1416 | if (vlan->mode == MACVLAN_MODE_PASSTHRU) { |
aa5fd0fb GF |
1417 | if (port->count) { |
1418 | err = -EINVAL; | |
1419 | goto destroy_macvlan_port; | |
1420 | } | |
43c2d578 | 1421 | macvlan_set_passthru(port); |
8b98604e | 1422 | eth_hw_addr_inherit(dev, lowerdev); |
eb06acdc SS |
1423 | } |
1424 | ||
79cf79ab | 1425 | if (data && data[IFLA_MACVLAN_MACADDR_MODE]) { |
aa5fd0fb GF |
1426 | if (vlan->mode != MACVLAN_MODE_SOURCE) { |
1427 | err = -EINVAL; | |
1428 | goto destroy_macvlan_port; | |
1429 | } | |
79cf79ab MB |
1430 | macmode = nla_get_u32(data[IFLA_MACVLAN_MACADDR_MODE]); |
1431 | err = macvlan_changelink_sources(vlan, macmode, data); | |
1432 | if (err) | |
aa5fd0fb | 1433 | goto destroy_macvlan_port; |
79cf79ab MB |
1434 | } |
1435 | ||
47d4ab91 JF |
1436 | err = register_netdevice(dev); |
1437 | if (err < 0) | |
aa5fd0fb | 1438 | goto destroy_macvlan_port; |
47d4ab91 | 1439 | |
a6cc0cfa | 1440 | dev->priv_flags |= IFF_MACVLAN; |
42ab19ee | 1441 | err = netdev_upper_dev_link(lowerdev, dev, extack); |
7cd43db7 | 1442 | if (err) |
da37705c | 1443 | goto unregister_netdev; |
b863ceb7 | 1444 | |
233c7df0 | 1445 | list_add_tail_rcu(&vlan->list, &port->vlans); |
fc4a7489 | 1446 | netif_stacked_transfer_operstate(lowerdev, dev); |
de7d244d | 1447 | linkwatch_fire_event(dev); |
f16d3d57 | 1448 | |
b863ceb7 | 1449 | return 0; |
f16d3d57 | 1450 | |
da37705c | 1451 | unregister_netdev: |
d02fd6e7 | 1452 | /* macvlan_uninit would free the macvlan port */ |
da37705c | 1453 | unregister_netdevice(dev); |
d02fd6e7 | 1454 | return err; |
aa5fd0fb | 1455 | destroy_macvlan_port: |
d02fd6e7 GF |
1456 | /* the macvlan port may be freed by macvlan_uninit when fail to register. |
1457 | * so we destroy the macvlan port only when it's valid. | |
1458 | */ | |
5a911f68 | 1459 | if (create && macvlan_port_get_rtnl(lowerdev)) |
aa5fd0fb | 1460 | macvlan_port_destroy(port->dev); |
f16d3d57 | 1461 | return err; |
b863ceb7 | 1462 | } |
fc0663d6 | 1463 | EXPORT_SYMBOL_GPL(macvlan_common_newlink); |
b863ceb7 | 1464 | |
fc0663d6 | 1465 | static int macvlan_newlink(struct net *src_net, struct net_device *dev, |
7a3f4a18 MS |
1466 | struct nlattr *tb[], struct nlattr *data[], |
1467 | struct netlink_ext_ack *extack) | |
fc0663d6 | 1468 | { |
42ab19ee | 1469 | return macvlan_common_newlink(src_net, dev, tb, data, extack); |
fc0663d6 AB |
1470 | } |
1471 | ||
1472 | void macvlan_dellink(struct net_device *dev, struct list_head *head) | |
b863ceb7 PM |
1473 | { |
1474 | struct macvlan_dev *vlan = netdev_priv(dev); | |
b863ceb7 | 1475 | |
79cf79ab MB |
1476 | if (vlan->mode == MACVLAN_MODE_SOURCE) |
1477 | macvlan_flush_sources(vlan->port, vlan); | |
233c7df0 | 1478 | list_del_rcu(&vlan->list); |
23289a37 | 1479 | unregister_netdevice_queue(dev, head); |
7cd43db7 | 1480 | netdev_upper_dev_unlink(vlan->lowerdev, dev); |
b863ceb7 | 1481 | } |
fc0663d6 | 1482 | EXPORT_SYMBOL_GPL(macvlan_dellink); |
b863ceb7 | 1483 | |
27c0b1a8 | 1484 | static int macvlan_changelink(struct net_device *dev, |
ad744b22 MS |
1485 | struct nlattr *tb[], struct nlattr *data[], |
1486 | struct netlink_ext_ack *extack) | |
27c0b1a8 AB |
1487 | { |
1488 | struct macvlan_dev *vlan = netdev_priv(dev); | |
266e8347 MT |
1489 | enum macvlan_mode mode; |
1490 | bool set_mode = false; | |
79cf79ab MB |
1491 | enum macvlan_macaddr_mode macmode; |
1492 | int ret; | |
266e8347 MT |
1493 | |
1494 | /* Validate mode, but don't set yet: setting flags may fail. */ | |
1495 | if (data && data[IFLA_MACVLAN_MODE]) { | |
1496 | set_mode = true; | |
1497 | mode = nla_get_u32(data[IFLA_MACVLAN_MODE]); | |
1498 | /* Passthrough mode can't be set or cleared dynamically */ | |
1499 | if ((mode == MACVLAN_MODE_PASSTHRU) != | |
1500 | (vlan->mode == MACVLAN_MODE_PASSTHRU)) | |
1501 | return -EINVAL; | |
79cf79ab MB |
1502 | if (vlan->mode == MACVLAN_MODE_SOURCE && |
1503 | vlan->mode != mode) | |
1504 | macvlan_flush_sources(vlan->port, vlan); | |
266e8347 | 1505 | } |
99ffc3e7 | 1506 | |
df8ef8f3 JF |
1507 | if (data && data[IFLA_MACVLAN_FLAGS]) { |
1508 | __u16 flags = nla_get_u16(data[IFLA_MACVLAN_FLAGS]); | |
1509 | bool promisc = (flags ^ vlan->flags) & MACVLAN_FLAG_NOPROMISC; | |
43c2d578 | 1510 | if (macvlan_passthru(vlan->port) && promisc) { |
99ffc3e7 MT |
1511 | int err; |
1512 | ||
1513 | if (flags & MACVLAN_FLAG_NOPROMISC) | |
1514 | err = dev_set_promiscuity(vlan->lowerdev, -1); | |
1515 | else | |
1516 | err = dev_set_promiscuity(vlan->lowerdev, 1); | |
1517 | if (err < 0) | |
1518 | return err; | |
1519 | } | |
df8ef8f3 JF |
1520 | vlan->flags = flags; |
1521 | } | |
266e8347 MT |
1522 | if (set_mode) |
1523 | vlan->mode = mode; | |
79cf79ab MB |
1524 | if (data && data[IFLA_MACVLAN_MACADDR_MODE]) { |
1525 | if (vlan->mode != MACVLAN_MODE_SOURCE) | |
1526 | return -EINVAL; | |
1527 | macmode = nla_get_u32(data[IFLA_MACVLAN_MACADDR_MODE]); | |
1528 | ret = macvlan_changelink_sources(vlan, macmode, data); | |
1529 | if (ret) | |
1530 | return ret; | |
1531 | } | |
27c0b1a8 AB |
1532 | return 0; |
1533 | } | |
1534 | ||
79cf79ab MB |
1535 | static size_t macvlan_get_size_mac(const struct macvlan_dev *vlan) |
1536 | { | |
1537 | if (vlan->macaddr_count == 0) | |
1538 | return 0; | |
1539 | return nla_total_size(0) /* IFLA_MACVLAN_MACADDR_DATA */ | |
1540 | + vlan->macaddr_count * nla_total_size(sizeof(u8) * ETH_ALEN); | |
1541 | } | |
1542 | ||
27c0b1a8 AB |
1543 | static size_t macvlan_get_size(const struct net_device *dev) |
1544 | { | |
79cf79ab MB |
1545 | struct macvlan_dev *vlan = netdev_priv(dev); |
1546 | ||
01fe944f ED |
1547 | return (0 |
1548 | + nla_total_size(4) /* IFLA_MACVLAN_MODE */ | |
1549 | + nla_total_size(2) /* IFLA_MACVLAN_FLAGS */ | |
79cf79ab MB |
1550 | + nla_total_size(4) /* IFLA_MACVLAN_MACADDR_COUNT */ |
1551 | + macvlan_get_size_mac(vlan) /* IFLA_MACVLAN_MACADDR */ | |
01fe944f | 1552 | ); |
27c0b1a8 AB |
1553 | } |
1554 | ||
79cf79ab MB |
1555 | static int macvlan_fill_info_macaddr(struct sk_buff *skb, |
1556 | const struct macvlan_dev *vlan, | |
1557 | const int i) | |
1558 | { | |
1559 | struct hlist_head *h = &vlan->port->vlan_source_hash[i]; | |
1560 | struct macvlan_source_entry *entry; | |
1561 | ||
1562 | hlist_for_each_entry_rcu(entry, h, hlist) { | |
1563 | if (entry->vlan != vlan) | |
1564 | continue; | |
1565 | if (nla_put(skb, IFLA_MACVLAN_MACADDR, ETH_ALEN, entry->addr)) | |
1566 | return 1; | |
1567 | } | |
1568 | return 0; | |
1569 | } | |
1570 | ||
27c0b1a8 AB |
1571 | static int macvlan_fill_info(struct sk_buff *skb, |
1572 | const struct net_device *dev) | |
1573 | { | |
1574 | struct macvlan_dev *vlan = netdev_priv(dev); | |
79cf79ab MB |
1575 | int i; |
1576 | struct nlattr *nest; | |
27c0b1a8 | 1577 | |
ead9a76c DM |
1578 | if (nla_put_u32(skb, IFLA_MACVLAN_MODE, vlan->mode)) |
1579 | goto nla_put_failure; | |
df8ef8f3 JF |
1580 | if (nla_put_u16(skb, IFLA_MACVLAN_FLAGS, vlan->flags)) |
1581 | goto nla_put_failure; | |
79cf79ab MB |
1582 | if (nla_put_u32(skb, IFLA_MACVLAN_MACADDR_COUNT, vlan->macaddr_count)) |
1583 | goto nla_put_failure; | |
1584 | if (vlan->macaddr_count > 0) { | |
1585 | nest = nla_nest_start(skb, IFLA_MACVLAN_MACADDR_DATA); | |
1586 | if (nest == NULL) | |
1587 | goto nla_put_failure; | |
1588 | ||
1589 | for (i = 0; i < MACVLAN_HASH_SIZE; i++) { | |
1590 | if (macvlan_fill_info_macaddr(skb, vlan, i)) | |
1591 | goto nla_put_failure; | |
1592 | } | |
1593 | nla_nest_end(skb, nest); | |
1594 | } | |
27c0b1a8 AB |
1595 | return 0; |
1596 | ||
1597 | nla_put_failure: | |
1598 | return -EMSGSIZE; | |
1599 | } | |
1600 | ||
1601 | static const struct nla_policy macvlan_policy[IFLA_MACVLAN_MAX + 1] = { | |
df8ef8f3 JF |
1602 | [IFLA_MACVLAN_MODE] = { .type = NLA_U32 }, |
1603 | [IFLA_MACVLAN_FLAGS] = { .type = NLA_U16 }, | |
79cf79ab MB |
1604 | [IFLA_MACVLAN_MACADDR_MODE] = { .type = NLA_U32 }, |
1605 | [IFLA_MACVLAN_MACADDR] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN }, | |
1606 | [IFLA_MACVLAN_MACADDR_DATA] = { .type = NLA_NESTED }, | |
1607 | [IFLA_MACVLAN_MACADDR_COUNT] = { .type = NLA_U32 }, | |
27c0b1a8 AB |
1608 | }; |
1609 | ||
fc0663d6 AB |
1610 | int macvlan_link_register(struct rtnl_link_ops *ops) |
1611 | { | |
1612 | /* common fields */ | |
fc0663d6 AB |
1613 | ops->validate = macvlan_validate; |
1614 | ops->maxtype = IFLA_MACVLAN_MAX; | |
1615 | ops->policy = macvlan_policy; | |
1616 | ops->changelink = macvlan_changelink; | |
1617 | ops->get_size = macvlan_get_size; | |
1618 | ops->fill_info = macvlan_fill_info; | |
1619 | ||
1620 | return rtnl_link_register(ops); | |
1621 | }; | |
1622 | EXPORT_SYMBOL_GPL(macvlan_link_register); | |
1623 | ||
eaca400f ND |
1624 | static struct net *macvlan_get_link_net(const struct net_device *dev) |
1625 | { | |
1626 | return dev_net(macvlan_dev_real_dev(dev)); | |
1627 | } | |
1628 | ||
fc0663d6 | 1629 | static struct rtnl_link_ops macvlan_link_ops = { |
b863ceb7 | 1630 | .kind = "macvlan", |
8a35747a | 1631 | .setup = macvlan_setup, |
b863ceb7 PM |
1632 | .newlink = macvlan_newlink, |
1633 | .dellink = macvlan_dellink, | |
eaca400f | 1634 | .get_link_net = macvlan_get_link_net, |
6fe3faf8 | 1635 | .priv_size = sizeof(struct macvlan_dev), |
b863ceb7 PM |
1636 | }; |
1637 | ||
1638 | static int macvlan_device_event(struct notifier_block *unused, | |
1639 | unsigned long event, void *ptr) | |
1640 | { | |
351638e7 | 1641 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); |
b863ceb7 PM |
1642 | struct macvlan_dev *vlan, *next; |
1643 | struct macvlan_port *port; | |
226bd341 | 1644 | LIST_HEAD(list_kill); |
b863ceb7 | 1645 | |
a35e2c1b | 1646 | if (!macvlan_port_exists(dev)) |
b863ceb7 PM |
1647 | return NOTIFY_DONE; |
1648 | ||
e052f7e6 | 1649 | port = macvlan_port_get_rtnl(dev); |
a35e2c1b | 1650 | |
b863ceb7 | 1651 | switch (event) { |
de7d244d | 1652 | case NETDEV_UP: |
b863ceb7 PM |
1653 | case NETDEV_CHANGE: |
1654 | list_for_each_entry(vlan, &port->vlans, list) | |
fc4a7489 PM |
1655 | netif_stacked_transfer_operstate(vlan->lowerdev, |
1656 | vlan->dev); | |
b863ceb7 PM |
1657 | break; |
1658 | case NETDEV_FEAT_CHANGE: | |
1659 | list_for_each_entry(vlan, &port->vlans, list) { | |
8c2acc53 | 1660 | vlan->dev->gso_max_size = dev->gso_max_size; |
f6773c5e | 1661 | vlan->dev->gso_max_segs = dev->gso_max_segs; |
797f87f8 | 1662 | netdev_update_features(vlan->dev); |
b863ceb7 PM |
1663 | } |
1664 | break; | |
3763e7ef | 1665 | case NETDEV_CHANGEMTU: |
1666 | list_for_each_entry(vlan, &port->vlans, list) { | |
1667 | if (vlan->dev->mtu <= dev->mtu) | |
1668 | continue; | |
1669 | dev_set_mtu(vlan->dev, dev->mtu); | |
1670 | } | |
e289fd28 | 1671 | break; |
1672 | case NETDEV_CHANGEADDR: | |
43c2d578 | 1673 | if (!macvlan_passthru(port)) |
e289fd28 | 1674 | return NOTIFY_DONE; |
1675 | ||
1676 | vlan = list_first_entry_or_null(&port->vlans, | |
1677 | struct macvlan_dev, | |
1678 | list); | |
1679 | ||
1680 | if (macvlan_sync_address(vlan->dev, dev->dev_addr)) | |
1681 | return NOTIFY_BAD; | |
1682 | ||
3763e7ef | 1683 | break; |
b863ceb7 | 1684 | case NETDEV_UNREGISTER: |
3b27e105 DL |
1685 | /* twiddle thumbs on netns device moves */ |
1686 | if (dev->reg_state != NETREG_UNREGISTERING) | |
1687 | break; | |
1688 | ||
b863ceb7 | 1689 | list_for_each_entry_safe(vlan, next, &port->vlans, list) |
226bd341 ED |
1690 | vlan->dev->rtnl_link_ops->dellink(vlan->dev, &list_kill); |
1691 | unregister_netdevice_many(&list_kill); | |
b863ceb7 | 1692 | break; |
1c01fe14 JP |
1693 | case NETDEV_PRE_TYPE_CHANGE: |
1694 | /* Forbid underlaying device to change its type. */ | |
1695 | return NOTIFY_BAD; | |
4c991255 VY |
1696 | |
1697 | case NETDEV_NOTIFY_PEERS: | |
1698 | case NETDEV_BONDING_FAILOVER: | |
1699 | case NETDEV_RESEND_IGMP: | |
1700 | /* Propagate to all vlans */ | |
1701 | list_for_each_entry(vlan, &port->vlans, list) | |
1702 | call_netdevice_notifiers(event, vlan->dev); | |
b863ceb7 PM |
1703 | } |
1704 | return NOTIFY_DONE; | |
1705 | } | |
1706 | ||
1707 | static struct notifier_block macvlan_notifier_block __read_mostly = { | |
1708 | .notifier_call = macvlan_device_event, | |
1709 | }; | |
1710 | ||
1711 | static int __init macvlan_init_module(void) | |
1712 | { | |
1713 | int err; | |
1714 | ||
1715 | register_netdevice_notifier(&macvlan_notifier_block); | |
b863ceb7 | 1716 | |
fc0663d6 | 1717 | err = macvlan_link_register(&macvlan_link_ops); |
b863ceb7 PM |
1718 | if (err < 0) |
1719 | goto err1; | |
1720 | return 0; | |
1721 | err1: | |
b863ceb7 PM |
1722 | unregister_netdevice_notifier(&macvlan_notifier_block); |
1723 | return err; | |
1724 | } | |
1725 | ||
1726 | static void __exit macvlan_cleanup_module(void) | |
1727 | { | |
1728 | rtnl_link_unregister(&macvlan_link_ops); | |
b863ceb7 PM |
1729 | unregister_netdevice_notifier(&macvlan_notifier_block); |
1730 | } | |
1731 | ||
1732 | module_init(macvlan_init_module); | |
1733 | module_exit(macvlan_cleanup_module); | |
1734 | ||
1735 | MODULE_LICENSE("GPL"); | |
1736 | MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>"); | |
1737 | MODULE_DESCRIPTION("Driver for MAC address based VLANs"); | |
1738 | MODULE_ALIAS_RTNL_LINK("macvlan"); |