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Commit | Line | Data |
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2874c5fd | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
b863ceb7 PM |
2 | /* |
3 | * Copyright (c) 2007 Patrick McHardy <kaber@trash.net> | |
4 | * | |
b863ceb7 PM |
5 | * The code this is based on carried the following copyright notice: |
6 | * --- | |
7 | * (C) Copyright 2001-2006 | |
8 | * Alex Zeffertt, Cambridge Broadband Ltd, ajz@cambridgebroadband.com | |
9 | * Re-worked by Ben Greear <greearb@candelatech.com> | |
10 | * --- | |
11 | */ | |
12 | #include <linux/kernel.h> | |
13 | #include <linux/types.h> | |
14 | #include <linux/module.h> | |
15 | #include <linux/init.h> | |
16 | #include <linux/errno.h> | |
17 | #include <linux/slab.h> | |
18 | #include <linux/string.h> | |
82524746 | 19 | #include <linux/rculist.h> |
b863ceb7 PM |
20 | #include <linux/notifier.h> |
21 | #include <linux/netdevice.h> | |
22 | #include <linux/etherdevice.h> | |
254c0a2b | 23 | #include <linux/net_tstamp.h> |
b863ceb7 PM |
24 | #include <linux/ethtool.h> |
25 | #include <linux/if_arp.h> | |
87002b03 | 26 | #include <linux/if_vlan.h> |
b863ceb7 PM |
27 | #include <linux/if_link.h> |
28 | #include <linux/if_macvlan.h> | |
cd431e73 | 29 | #include <linux/hash.h> |
412ca155 | 30 | #include <linux/workqueue.h> |
b863ceb7 | 31 | #include <net/rtnetlink.h> |
618e1b74 | 32 | #include <net/xfrm.h> |
688cea83 | 33 | #include <linux/netpoll.h> |
254c0a2b | 34 | #include <linux/phy.h> |
b863ceb7 | 35 | |
79cf79ab MB |
36 | #define MACVLAN_HASH_BITS 8 |
37 | #define MACVLAN_HASH_SIZE (1<<MACVLAN_HASH_BITS) | |
07d92d5c | 38 | #define MACVLAN_BC_QUEUE_LEN 1000 |
b863ceb7 | 39 | |
43c2d578 | 40 | #define MACVLAN_F_PASSTHRU 1 |
18c8c54d | 41 | #define MACVLAN_F_ADDRCHANGE 2 |
43c2d578 | 42 | |
b863ceb7 PM |
43 | struct macvlan_port { |
44 | struct net_device *dev; | |
45 | struct hlist_head vlan_hash[MACVLAN_HASH_SIZE]; | |
46 | struct list_head vlans; | |
412ca155 HX |
47 | struct sk_buff_head bc_queue; |
48 | struct work_struct bc_work; | |
43c2d578 | 49 | u32 flags; |
5e3c516b | 50 | int count; |
79cf79ab | 51 | struct hlist_head vlan_source_hash[MACVLAN_HASH_SIZE]; |
9c127a01 | 52 | DECLARE_BITMAP(mc_filter, MACVLAN_MC_FILTER_SZ); |
18c8c54d | 53 | unsigned char perm_addr[ETH_ALEN]; |
79cf79ab MB |
54 | }; |
55 | ||
56 | struct macvlan_source_entry { | |
57 | struct hlist_node hlist; | |
58 | struct macvlan_dev *vlan; | |
59 | unsigned char addr[6+2] __aligned(sizeof(u16)); | |
60 | struct rcu_head rcu; | |
b863ceb7 PM |
61 | }; |
62 | ||
412ca155 HX |
63 | struct macvlan_skb_cb { |
64 | const struct macvlan_dev *src; | |
65 | }; | |
66 | ||
67 | #define MACVLAN_SKB_CB(__skb) ((struct macvlan_skb_cb *)&((__skb)->cb[0])) | |
68 | ||
d5cd9244 EB |
69 | static void macvlan_port_destroy(struct net_device *dev); |
70 | ||
43c2d578 VY |
71 | static inline bool macvlan_passthru(const struct macvlan_port *port) |
72 | { | |
73 | return port->flags & MACVLAN_F_PASSTHRU; | |
74 | } | |
75 | ||
76 | static inline void macvlan_set_passthru(struct macvlan_port *port) | |
77 | { | |
78 | port->flags |= MACVLAN_F_PASSTHRU; | |
79 | } | |
80 | ||
18c8c54d VY |
81 | static inline bool macvlan_addr_change(const struct macvlan_port *port) |
82 | { | |
83 | return port->flags & MACVLAN_F_ADDRCHANGE; | |
84 | } | |
85 | ||
86 | static inline void macvlan_set_addr_change(struct macvlan_port *port) | |
87 | { | |
88 | port->flags |= MACVLAN_F_ADDRCHANGE; | |
89 | } | |
90 | ||
91 | static inline void macvlan_clear_addr_change(struct macvlan_port *port) | |
92 | { | |
93 | port->flags &= ~MACVLAN_F_ADDRCHANGE; | |
94 | } | |
95 | ||
79cf79ab MB |
96 | /* Hash Ethernet address */ |
97 | static u32 macvlan_eth_hash(const unsigned char *addr) | |
98 | { | |
99 | u64 value = get_unaligned((u64 *)addr); | |
100 | ||
101 | /* only want 6 bytes */ | |
102 | #ifdef __BIG_ENDIAN | |
103 | value >>= 16; | |
104 | #else | |
105 | value <<= 16; | |
106 | #endif | |
107 | return hash_64(value, MACVLAN_HASH_BITS); | |
108 | } | |
109 | ||
e052f7e6 ED |
110 | static struct macvlan_port *macvlan_port_get_rcu(const struct net_device *dev) |
111 | { | |
112 | return rcu_dereference(dev->rx_handler_data); | |
113 | } | |
114 | ||
115 | static struct macvlan_port *macvlan_port_get_rtnl(const struct net_device *dev) | |
116 | { | |
117 | return rtnl_dereference(dev->rx_handler_data); | |
118 | } | |
119 | ||
b863ceb7 PM |
120 | static struct macvlan_dev *macvlan_hash_lookup(const struct macvlan_port *port, |
121 | const unsigned char *addr) | |
122 | { | |
123 | struct macvlan_dev *vlan; | |
79cf79ab | 124 | u32 idx = macvlan_eth_hash(addr); |
b863ceb7 | 125 | |
79cf79ab | 126 | hlist_for_each_entry_rcu(vlan, &port->vlan_hash[idx], hlist) { |
a6700db1 | 127 | if (ether_addr_equal_64bits(vlan->dev->dev_addr, addr)) |
b863ceb7 PM |
128 | return vlan; |
129 | } | |
130 | return NULL; | |
131 | } | |
132 | ||
79cf79ab MB |
133 | static struct macvlan_source_entry *macvlan_hash_lookup_source( |
134 | const struct macvlan_dev *vlan, | |
135 | const unsigned char *addr) | |
136 | { | |
137 | struct macvlan_source_entry *entry; | |
138 | u32 idx = macvlan_eth_hash(addr); | |
139 | struct hlist_head *h = &vlan->port->vlan_source_hash[idx]; | |
140 | ||
141 | hlist_for_each_entry_rcu(entry, h, hlist) { | |
142 | if (ether_addr_equal_64bits(entry->addr, addr) && | |
143 | entry->vlan == vlan) | |
144 | return entry; | |
145 | } | |
146 | return NULL; | |
147 | } | |
148 | ||
149 | static int macvlan_hash_add_source(struct macvlan_dev *vlan, | |
150 | const unsigned char *addr) | |
151 | { | |
152 | struct macvlan_port *port = vlan->port; | |
153 | struct macvlan_source_entry *entry; | |
154 | struct hlist_head *h; | |
155 | ||
156 | entry = macvlan_hash_lookup_source(vlan, addr); | |
157 | if (entry) | |
158 | return 0; | |
159 | ||
160 | entry = kmalloc(sizeof(*entry), GFP_KERNEL); | |
161 | if (!entry) | |
162 | return -ENOMEM; | |
163 | ||
164 | ether_addr_copy(entry->addr, addr); | |
165 | entry->vlan = vlan; | |
166 | h = &port->vlan_source_hash[macvlan_eth_hash(addr)]; | |
167 | hlist_add_head_rcu(&entry->hlist, h); | |
168 | vlan->macaddr_count++; | |
169 | ||
170 | return 0; | |
171 | } | |
172 | ||
f9ac30f0 EB |
173 | static void macvlan_hash_add(struct macvlan_dev *vlan) |
174 | { | |
175 | struct macvlan_port *port = vlan->port; | |
176 | const unsigned char *addr = vlan->dev->dev_addr; | |
79cf79ab | 177 | u32 idx = macvlan_eth_hash(addr); |
f9ac30f0 | 178 | |
79cf79ab MB |
179 | hlist_add_head_rcu(&vlan->hlist, &port->vlan_hash[idx]); |
180 | } | |
181 | ||
182 | static void macvlan_hash_del_source(struct macvlan_source_entry *entry) | |
183 | { | |
184 | hlist_del_rcu(&entry->hlist); | |
185 | kfree_rcu(entry, rcu); | |
f9ac30f0 EB |
186 | } |
187 | ||
449f4544 | 188 | static void macvlan_hash_del(struct macvlan_dev *vlan, bool sync) |
f9ac30f0 EB |
189 | { |
190 | hlist_del_rcu(&vlan->hlist); | |
449f4544 ED |
191 | if (sync) |
192 | synchronize_rcu(); | |
f9ac30f0 EB |
193 | } |
194 | ||
195 | static void macvlan_hash_change_addr(struct macvlan_dev *vlan, | |
196 | const unsigned char *addr) | |
197 | { | |
449f4544 | 198 | macvlan_hash_del(vlan, true); |
f9ac30f0 EB |
199 | /* Now that we are unhashed it is safe to change the device |
200 | * address without confusing packet delivery. | |
201 | */ | |
202 | memcpy(vlan->dev->dev_addr, addr, ETH_ALEN); | |
203 | macvlan_hash_add(vlan); | |
204 | } | |
205 | ||
d94d0254 GF |
206 | static bool macvlan_addr_busy(const struct macvlan_port *port, |
207 | const unsigned char *addr) | |
f9ac30f0 | 208 | { |
18c8c54d | 209 | /* Test to see if the specified address is |
f9ac30f0 EB |
210 | * currently in use by the underlying device or |
211 | * another macvlan. | |
212 | */ | |
18c8c54d | 213 | if (!macvlan_passthru(port) && !macvlan_addr_change(port) && |
e696cda7 | 214 | ether_addr_equal_64bits(port->dev->dev_addr, addr)) |
d94d0254 | 215 | return true; |
f9ac30f0 EB |
216 | |
217 | if (macvlan_hash_lookup(port, addr)) | |
d94d0254 | 218 | return true; |
f9ac30f0 | 219 | |
d94d0254 | 220 | return false; |
f9ac30f0 EB |
221 | } |
222 | ||
a1e514c5 | 223 | |
fc0663d6 AB |
224 | static int macvlan_broadcast_one(struct sk_buff *skb, |
225 | const struct macvlan_dev *vlan, | |
618e1b74 | 226 | const struct ethhdr *eth, bool local) |
a1e514c5 | 227 | { |
fc0663d6 | 228 | struct net_device *dev = vlan->dev; |
a1e514c5 | 229 | |
618e1b74 | 230 | if (local) |
412ca155 | 231 | return __dev_forward_skb(dev, skb); |
618e1b74 | 232 | |
a1e514c5 | 233 | skb->dev = dev; |
a6700db1 | 234 | if (ether_addr_equal_64bits(eth->h_dest, dev->broadcast)) |
a1e514c5 AB |
235 | skb->pkt_type = PACKET_BROADCAST; |
236 | else | |
237 | skb->pkt_type = PACKET_MULTICAST; | |
238 | ||
412ca155 | 239 | return 0; |
a1e514c5 AB |
240 | } |
241 | ||
3807ff58 ED |
242 | static u32 macvlan_hash_mix(const struct macvlan_dev *vlan) |
243 | { | |
244 | return (u32)(((unsigned long)vlan) >> L1_CACHE_SHIFT); | |
245 | } | |
246 | ||
247 | ||
248 | static unsigned int mc_hash(const struct macvlan_dev *vlan, | |
249 | const unsigned char *addr) | |
cd431e73 ED |
250 | { |
251 | u32 val = __get_unaligned_cpu32(addr + 2); | |
252 | ||
3807ff58 | 253 | val ^= macvlan_hash_mix(vlan); |
cd431e73 ED |
254 | return hash_32(val, MACVLAN_MC_FILTER_BITS); |
255 | } | |
256 | ||
b863ceb7 | 257 | static void macvlan_broadcast(struct sk_buff *skb, |
618e1b74 AB |
258 | const struct macvlan_port *port, |
259 | struct net_device *src, | |
260 | enum macvlan_mode mode) | |
b863ceb7 | 261 | { |
1712b2ff | 262 | const struct ethhdr *eth = eth_hdr(skb); |
b863ceb7 | 263 | const struct macvlan_dev *vlan; |
b863ceb7 PM |
264 | struct sk_buff *nskb; |
265 | unsigned int i; | |
a1e514c5 | 266 | int err; |
3807ff58 | 267 | unsigned int hash; |
b863ceb7 | 268 | |
efbbced3 PM |
269 | if (skb->protocol == htons(ETH_P_PAUSE)) |
270 | return; | |
271 | ||
b863ceb7 | 272 | for (i = 0; i < MACVLAN_HASH_SIZE; i++) { |
b67bfe0d | 273 | hlist_for_each_entry_rcu(vlan, &port->vlan_hash[i], hlist) { |
618e1b74 AB |
274 | if (vlan->dev == src || !(vlan->mode & mode)) |
275 | continue; | |
276 | ||
3807ff58 | 277 | hash = mc_hash(vlan, eth->h_dest); |
cd431e73 ED |
278 | if (!test_bit(hash, vlan->mc_filter)) |
279 | continue; | |
de9e8f3f HX |
280 | |
281 | err = NET_RX_DROP; | |
b863ceb7 | 282 | nskb = skb_clone(skb, GFP_ATOMIC); |
de9e8f3f HX |
283 | if (likely(nskb)) |
284 | err = macvlan_broadcast_one( | |
285 | nskb, vlan, eth, | |
412ca155 HX |
286 | mode == MACVLAN_MODE_BRIDGE) ?: |
287 | netif_rx_ni(nskb); | |
a1e514c5 | 288 | macvlan_count_rx(vlan, skb->len + ETH_HLEN, |
4c979935 | 289 | err == NET_RX_SUCCESS, true); |
b863ceb7 PM |
290 | } |
291 | } | |
292 | } | |
293 | ||
412ca155 | 294 | static void macvlan_process_broadcast(struct work_struct *w) |
b863ceb7 | 295 | { |
412ca155 HX |
296 | struct macvlan_port *port = container_of(w, struct macvlan_port, |
297 | bc_work); | |
298 | struct sk_buff *skb; | |
299 | struct sk_buff_head list; | |
300 | ||
fe0ca732 | 301 | __skb_queue_head_init(&list); |
412ca155 HX |
302 | |
303 | spin_lock_bh(&port->bc_queue.lock); | |
304 | skb_queue_splice_tail_init(&port->bc_queue, &list); | |
305 | spin_unlock_bh(&port->bc_queue.lock); | |
306 | ||
307 | while ((skb = __skb_dequeue(&list))) { | |
308 | const struct macvlan_dev *src = MACVLAN_SKB_CB(skb)->src; | |
309 | ||
310 | rcu_read_lock(); | |
b863ceb7 | 311 | |
618e1b74 AB |
312 | if (!src) |
313 | /* frame comes from an external address */ | |
314 | macvlan_broadcast(skb, port, NULL, | |
315 | MACVLAN_MODE_PRIVATE | | |
316 | MACVLAN_MODE_VEPA | | |
eb06acdc | 317 | MACVLAN_MODE_PASSTHRU| |
618e1b74 AB |
318 | MACVLAN_MODE_BRIDGE); |
319 | else if (src->mode == MACVLAN_MODE_VEPA) | |
320 | /* flood to everyone except source */ | |
321 | macvlan_broadcast(skb, port, src->dev, | |
322 | MACVLAN_MODE_VEPA | | |
323 | MACVLAN_MODE_BRIDGE); | |
412ca155 | 324 | else |
618e1b74 AB |
325 | /* |
326 | * flood only to VEPA ports, bridge ports | |
327 | * already saw the frame on the way out. | |
328 | */ | |
329 | macvlan_broadcast(skb, port, src->dev, | |
330 | MACVLAN_MODE_VEPA); | |
412ca155 HX |
331 | |
332 | rcu_read_unlock(); | |
333 | ||
260916df HX |
334 | if (src) |
335 | dev_put(src->dev); | |
bf97403a | 336 | consume_skb(skb); |
ce9a4186 MB |
337 | |
338 | cond_resched(); | |
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 | ||
1d7ea556 MD |
364 | schedule_work(&port->bc_work); |
365 | ||
412ca155 | 366 | if (err) |
e676f197 | 367 | goto free_nskb; |
412ca155 | 368 | |
412ca155 HX |
369 | return; |
370 | ||
e676f197 HX |
371 | free_nskb: |
372 | kfree_skb(nskb); | |
412ca155 HX |
373 | err: |
374 | atomic_long_inc(&skb->dev->rx_dropped); | |
375 | } | |
376 | ||
79cf79ab MB |
377 | static void macvlan_flush_sources(struct macvlan_port *port, |
378 | struct macvlan_dev *vlan) | |
379 | { | |
380 | int i; | |
381 | ||
382 | for (i = 0; i < MACVLAN_HASH_SIZE; i++) { | |
383 | struct hlist_node *h, *n; | |
384 | ||
385 | hlist_for_each_safe(h, n, &port->vlan_source_hash[i]) { | |
386 | struct macvlan_source_entry *entry; | |
387 | ||
388 | entry = hlist_entry(h, struct macvlan_source_entry, | |
389 | hlist); | |
390 | if (entry->vlan == vlan) | |
391 | macvlan_hash_del_source(entry); | |
392 | } | |
393 | } | |
394 | vlan->macaddr_count = 0; | |
395 | } | |
396 | ||
397 | static void macvlan_forward_source_one(struct sk_buff *skb, | |
398 | struct macvlan_dev *vlan) | |
399 | { | |
400 | struct sk_buff *nskb; | |
401 | struct net_device *dev; | |
402 | int len; | |
403 | int ret; | |
404 | ||
405 | dev = vlan->dev; | |
406 | if (unlikely(!(dev->flags & IFF_UP))) | |
407 | return; | |
408 | ||
409 | nskb = skb_clone(skb, GFP_ATOMIC); | |
410 | if (!nskb) | |
411 | return; | |
412 | ||
413 | len = nskb->len + ETH_HLEN; | |
414 | nskb->dev = dev; | |
c8c41ea1 AD |
415 | |
416 | if (ether_addr_equal_64bits(eth_hdr(skb)->h_dest, dev->dev_addr)) | |
417 | nskb->pkt_type = PACKET_HOST; | |
79cf79ab MB |
418 | |
419 | ret = netif_rx(nskb); | |
4c979935 | 420 | macvlan_count_rx(vlan, len, ret == NET_RX_SUCCESS, false); |
79cf79ab MB |
421 | } |
422 | ||
423 | static void macvlan_forward_source(struct sk_buff *skb, | |
424 | struct macvlan_port *port, | |
425 | const unsigned char *addr) | |
426 | { | |
427 | struct macvlan_source_entry *entry; | |
428 | u32 idx = macvlan_eth_hash(addr); | |
429 | struct hlist_head *h = &port->vlan_source_hash[idx]; | |
430 | ||
431 | hlist_for_each_entry_rcu(entry, h, hlist) { | |
432 | if (ether_addr_equal_64bits(entry->addr, addr)) | |
fc51f2b7 | 433 | macvlan_forward_source_one(skb, entry->vlan); |
79cf79ab MB |
434 | } |
435 | } | |
436 | ||
412ca155 HX |
437 | /* called under rcu_read_lock() from netif_receive_skb */ |
438 | static rx_handler_result_t macvlan_handle_frame(struct sk_buff **pskb) | |
439 | { | |
440 | struct macvlan_port *port; | |
441 | struct sk_buff *skb = *pskb; | |
442 | const struct ethhdr *eth = eth_hdr(skb); | |
443 | const struct macvlan_dev *vlan; | |
444 | const struct macvlan_dev *src; | |
445 | struct net_device *dev; | |
446 | unsigned int len = 0; | |
d1dd9119 | 447 | int ret; |
448 | rx_handler_result_t handle_res; | |
412ca155 HX |
449 | |
450 | port = macvlan_port_get_rcu(skb->dev); | |
451 | if (is_multicast_ether_addr(eth->h_dest)) { | |
9c127a01 HX |
452 | unsigned int hash; |
453 | ||
19bcf9f2 | 454 | skb = ip_check_defrag(dev_net(skb->dev), skb, IP_DEFRAG_MACVLAN); |
412ca155 HX |
455 | if (!skb) |
456 | return RX_HANDLER_CONSUMED; | |
e639b8d8 | 457 | *pskb = skb; |
412ca155 | 458 | eth = eth_hdr(skb); |
79cf79ab | 459 | macvlan_forward_source(skb, port, eth->h_source); |
412ca155 HX |
460 | src = macvlan_hash_lookup(port, eth->h_source); |
461 | if (src && src->mode != MACVLAN_MODE_VEPA && | |
462 | src->mode != MACVLAN_MODE_BRIDGE) { | |
729e72a1 | 463 | /* forward to original port. */ |
464 | vlan = src; | |
412ca155 HX |
465 | ret = macvlan_broadcast_one(skb, vlan, eth, 0) ?: |
466 | netif_rx(skb); | |
d1dd9119 | 467 | handle_res = RX_HANDLER_CONSUMED; |
729e72a1 | 468 | goto out; |
469 | } | |
470 | ||
9c127a01 HX |
471 | hash = mc_hash(NULL, eth->h_dest); |
472 | if (test_bit(hash, port->mc_filter)) | |
473 | macvlan_broadcast_enqueue(port, src, skb); | |
412ca155 | 474 | |
8a4eb573 | 475 | return RX_HANDLER_PASS; |
b863ceb7 PM |
476 | } |
477 | ||
79cf79ab | 478 | macvlan_forward_source(skb, port, eth->h_source); |
43c2d578 | 479 | if (macvlan_passthru(port)) |
233c7df0 JP |
480 | vlan = list_first_or_null_rcu(&port->vlans, |
481 | struct macvlan_dev, list); | |
eb06acdc SS |
482 | else |
483 | vlan = macvlan_hash_lookup(port, eth->h_dest); | |
dd6b9c2c | 484 | if (!vlan || vlan->mode == MACVLAN_MODE_SOURCE) |
8a4eb573 | 485 | return RX_HANDLER_PASS; |
b863ceb7 PM |
486 | |
487 | dev = vlan->dev; | |
488 | if (unlikely(!(dev->flags & IFF_UP))) { | |
489 | kfree_skb(skb); | |
8a4eb573 | 490 | return RX_HANDLER_CONSUMED; |
b863ceb7 | 491 | } |
a1e514c5 | 492 | len = skb->len + ETH_HLEN; |
b863ceb7 | 493 | skb = skb_share_check(skb, GFP_ATOMIC); |
d1dd9119 | 494 | if (!skb) { |
495 | ret = NET_RX_DROP; | |
496 | handle_res = RX_HANDLER_CONSUMED; | |
ba01877f | 497 | goto out; |
d1dd9119 | 498 | } |
b863ceb7 | 499 | |
e639b8d8 | 500 | *pskb = skb; |
b863ceb7 PM |
501 | skb->dev = dev; |
502 | skb->pkt_type = PACKET_HOST; | |
503 | ||
d1dd9119 | 504 | ret = NET_RX_SUCCESS; |
505 | handle_res = RX_HANDLER_ANOTHER; | |
ba01877f | 506 | out: |
4c979935 | 507 | macvlan_count_rx(vlan, len, ret == NET_RX_SUCCESS, false); |
d1dd9119 | 508 | return handle_res; |
b863ceb7 PM |
509 | } |
510 | ||
618e1b74 AB |
511 | static int macvlan_queue_xmit(struct sk_buff *skb, struct net_device *dev) |
512 | { | |
513 | const struct macvlan_dev *vlan = netdev_priv(dev); | |
514 | const struct macvlan_port *port = vlan->port; | |
515 | const struct macvlan_dev *dest; | |
516 | ||
517 | if (vlan->mode == MACVLAN_MODE_BRIDGE) { | |
1712b2ff | 518 | const struct ethhdr *eth = skb_eth_hdr(skb); |
618e1b74 AB |
519 | |
520 | /* send to other bridge ports directly */ | |
521 | if (is_multicast_ether_addr(eth->h_dest)) { | |
1712b2ff | 522 | skb_reset_mac_header(skb); |
618e1b74 AB |
523 | macvlan_broadcast(skb, port, dev, MACVLAN_MODE_BRIDGE); |
524 | goto xmit_world; | |
525 | } | |
526 | ||
527 | dest = macvlan_hash_lookup(port, eth->h_dest); | |
528 | if (dest && dest->mode == MACVLAN_MODE_BRIDGE) { | |
a37dd333 | 529 | /* send to lowerdev first for its network taps */ |
cb2d0f3e | 530 | dev_forward_skb(vlan->lowerdev, skb); |
618e1b74 AB |
531 | |
532 | return NET_XMIT_SUCCESS; | |
533 | } | |
534 | } | |
618e1b74 | 535 | xmit_world: |
59b9997b | 536 | skb->dev = vlan->lowerdev; |
eadec877 AD |
537 | return dev_queue_xmit_accel(skb, |
538 | netdev_get_sb_channel(dev) ? dev : NULL); | |
618e1b74 AB |
539 | } |
540 | ||
688cea83 | 541 | static inline netdev_tx_t macvlan_netpoll_send_skb(struct macvlan_dev *vlan, struct sk_buff *skb) |
542 | { | |
543 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
544 | if (vlan->netpoll) | |
545 | netpoll_send_skb(vlan->netpoll, skb); | |
546 | #else | |
547 | BUG(); | |
548 | #endif | |
549 | return NETDEV_TX_OK; | |
550 | } | |
551 | ||
0db901bd | 552 | static netdev_tx_t macvlan_start_xmit(struct sk_buff *skb, |
553 | struct net_device *dev) | |
b863ceb7 | 554 | { |
81d4e91c | 555 | struct macvlan_dev *vlan = netdev_priv(dev); |
b863ceb7 PM |
556 | unsigned int len = skb->len; |
557 | int ret; | |
688cea83 | 558 | |
559 | if (unlikely(netpoll_tx_running(dev))) | |
560 | return macvlan_netpoll_send_skb(vlan, skb); | |
b863ceb7 | 561 | |
81d4e91c | 562 | ret = macvlan_queue_xmit(skb, dev); |
a6cc0cfa | 563 | |
2d6c9ffc | 564 | if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) { |
cdf3e274 | 565 | struct vlan_pcpu_stats *pcpu_stats; |
2c114553 | 566 | |
8ffab51b ED |
567 | pcpu_stats = this_cpu_ptr(vlan->pcpu_stats); |
568 | u64_stats_update_begin(&pcpu_stats->syncp); | |
569 | pcpu_stats->tx_packets++; | |
570 | pcpu_stats->tx_bytes += len; | |
571 | u64_stats_update_end(&pcpu_stats->syncp); | |
572 | } else { | |
573 | this_cpu_inc(vlan->pcpu_stats->tx_dropped); | |
574 | } | |
cbbef5e1 | 575 | return ret; |
b863ceb7 PM |
576 | } |
577 | ||
578 | static int macvlan_hard_header(struct sk_buff *skb, struct net_device *dev, | |
3b04ddde SH |
579 | unsigned short type, const void *daddr, |
580 | const void *saddr, unsigned len) | |
b863ceb7 PM |
581 | { |
582 | const struct macvlan_dev *vlan = netdev_priv(dev); | |
583 | struct net_device *lowerdev = vlan->lowerdev; | |
584 | ||
0c4e8581 SH |
585 | return dev_hard_header(skb, lowerdev, type, daddr, |
586 | saddr ? : dev->dev_addr, len); | |
b863ceb7 PM |
587 | } |
588 | ||
3b04ddde SH |
589 | static const struct header_ops macvlan_hard_header_ops = { |
590 | .create = macvlan_hard_header, | |
3b04ddde | 591 | .parse = eth_header_parse, |
3b04ddde SH |
592 | .cache = eth_header_cache, |
593 | .cache_update = eth_header_cache_update, | |
594 | }; | |
595 | ||
b863ceb7 PM |
596 | static int macvlan_open(struct net_device *dev) |
597 | { | |
598 | struct macvlan_dev *vlan = netdev_priv(dev); | |
b863ceb7 PM |
599 | struct net_device *lowerdev = vlan->lowerdev; |
600 | int err; | |
601 | ||
43c2d578 | 602 | if (macvlan_passthru(vlan->port)) { |
78738141 MT |
603 | if (!(vlan->flags & MACVLAN_FLAG_NOPROMISC)) { |
604 | err = dev_set_promiscuity(lowerdev, 1); | |
605 | if (err < 0) | |
606 | goto out; | |
607 | } | |
eb06acdc SS |
608 | goto hash_add; |
609 | } | |
610 | ||
59f997b0 | 611 | err = -EADDRINUSE; |
7d775f63 AD |
612 | if (macvlan_addr_busy(vlan->port, dev->dev_addr)) |
613 | goto out; | |
614 | ||
615 | /* Attempt to populate accel_priv which is used to offload the L2 | |
616 | * forwarding requests for unicast packets. | |
617 | */ | |
81d4e91c | 618 | if (lowerdev->features & NETIF_F_HW_L2FW_DOFFLOAD) |
7d775f63 | 619 | vlan->accel_priv = |
a6cc0cfa JF |
620 | lowerdev->netdev_ops->ndo_dfwd_add_station(lowerdev, dev); |
621 | ||
81d4e91c AD |
622 | /* If earlier attempt to offload failed, or accel_priv is not |
623 | * populated we must add the unicast address to the lower device. | |
624 | */ | |
625 | if (IS_ERR_OR_NULL(vlan->accel_priv)) { | |
626 | vlan->accel_priv = NULL; | |
627 | err = dev_uc_add(lowerdev, dev->dev_addr); | |
628 | if (err < 0) | |
629 | goto out; | |
a6cc0cfa JF |
630 | } |
631 | ||
b89fb7da WC |
632 | if (dev->flags & IFF_ALLMULTI) { |
633 | err = dev_set_allmulti(lowerdev, 1); | |
634 | if (err < 0) | |
635 | goto del_unicast; | |
636 | } | |
eb06acdc | 637 | |
efdbd2b3 VY |
638 | if (dev->flags & IFF_PROMISC) { |
639 | err = dev_set_promiscuity(lowerdev, 1); | |
640 | if (err < 0) | |
641 | goto clear_multi; | |
642 | } | |
643 | ||
eb06acdc | 644 | hash_add: |
f9ac30f0 | 645 | macvlan_hash_add(vlan); |
b863ceb7 | 646 | return 0; |
b89fb7da | 647 | |
efdbd2b3 | 648 | clear_multi: |
c3891fa2 GF |
649 | if (dev->flags & IFF_ALLMULTI) |
650 | dev_set_allmulti(lowerdev, -1); | |
b89fb7da | 651 | del_unicast: |
7d775f63 | 652 | if (vlan->accel_priv) { |
a6cc0cfa | 653 | lowerdev->netdev_ops->ndo_dfwd_del_station(lowerdev, |
7d775f63 AD |
654 | vlan->accel_priv); |
655 | vlan->accel_priv = NULL; | |
81d4e91c AD |
656 | } else { |
657 | dev_uc_del(lowerdev, dev->dev_addr); | |
a6cc0cfa | 658 | } |
81d4e91c | 659 | out: |
b89fb7da | 660 | return err; |
b863ceb7 PM |
661 | } |
662 | ||
663 | static int macvlan_stop(struct net_device *dev) | |
664 | { | |
665 | struct macvlan_dev *vlan = netdev_priv(dev); | |
666 | struct net_device *lowerdev = vlan->lowerdev; | |
667 | ||
7d775f63 | 668 | if (vlan->accel_priv) { |
a6cc0cfa | 669 | lowerdev->netdev_ops->ndo_dfwd_del_station(lowerdev, |
7d775f63 AD |
670 | vlan->accel_priv); |
671 | vlan->accel_priv = NULL; | |
a6cc0cfa JF |
672 | } |
673 | ||
df8ef8f3 JF |
674 | dev_uc_unsync(lowerdev, dev); |
675 | dev_mc_unsync(lowerdev, dev); | |
676 | ||
43c2d578 | 677 | if (macvlan_passthru(vlan->port)) { |
df8ef8f3 JF |
678 | if (!(vlan->flags & MACVLAN_FLAG_NOPROMISC)) |
679 | dev_set_promiscuity(lowerdev, -1); | |
eb06acdc SS |
680 | goto hash_del; |
681 | } | |
682 | ||
b863ceb7 PM |
683 | if (dev->flags & IFF_ALLMULTI) |
684 | dev_set_allmulti(lowerdev, -1); | |
685 | ||
efdbd2b3 VY |
686 | if (dev->flags & IFF_PROMISC) |
687 | dev_set_promiscuity(lowerdev, -1); | |
688 | ||
a748ee24 | 689 | dev_uc_del(lowerdev, dev->dev_addr); |
b863ceb7 | 690 | |
eb06acdc | 691 | hash_del: |
449f4544 | 692 | macvlan_hash_del(vlan, !dev->dismantle); |
b863ceb7 PM |
693 | return 0; |
694 | } | |
695 | ||
e289fd28 | 696 | static int macvlan_sync_address(struct net_device *dev, unsigned char *addr) |
ad5d20a6 PM |
697 | { |
698 | struct macvlan_dev *vlan = netdev_priv(dev); | |
699 | struct net_device *lowerdev = vlan->lowerdev; | |
18c8c54d | 700 | struct macvlan_port *port = vlan->port; |
ad5d20a6 PM |
701 | int err; |
702 | ||
f9ac30f0 EB |
703 | if (!(dev->flags & IFF_UP)) { |
704 | /* Just copy in the new address */ | |
e289fd28 | 705 | ether_addr_copy(dev->dev_addr, addr); |
f9ac30f0 EB |
706 | } else { |
707 | /* Rehash and update the device filters */ | |
e289fd28 | 708 | if (macvlan_addr_busy(vlan->port, addr)) |
59f997b0 | 709 | return -EADDRINUSE; |
ad5d20a6 | 710 | |
18c8c54d | 711 | if (!macvlan_passthru(port)) { |
e289fd28 | 712 | err = dev_uc_add(lowerdev, addr); |
713 | if (err) | |
714 | return err; | |
ad5d20a6 | 715 | |
e289fd28 | 716 | dev_uc_del(lowerdev, dev->dev_addr); |
717 | } | |
f9ac30f0 | 718 | |
e289fd28 | 719 | macvlan_hash_change_addr(vlan, addr); |
f9ac30f0 | 720 | } |
18c8c54d VY |
721 | if (macvlan_passthru(port) && !macvlan_addr_change(port)) { |
722 | /* Since addr_change isn't set, we are here due to lower | |
723 | * device change. Save the lower-dev address so we can | |
724 | * restore it later. | |
725 | */ | |
726 | ether_addr_copy(vlan->port->perm_addr, | |
727 | lowerdev->dev_addr); | |
728 | } | |
729 | macvlan_clear_addr_change(port); | |
ad5d20a6 PM |
730 | return 0; |
731 | } | |
732 | ||
e289fd28 | 733 | static int macvlan_set_mac_address(struct net_device *dev, void *p) |
734 | { | |
735 | struct macvlan_dev *vlan = netdev_priv(dev); | |
736 | struct sockaddr *addr = p; | |
737 | ||
738 | if (!is_valid_ether_addr(addr->sa_data)) | |
739 | return -EADDRNOTAVAIL; | |
740 | ||
e26f43fa VY |
741 | /* If the addresses are the same, this is a no-op */ |
742 | if (ether_addr_equal(dev->dev_addr, addr->sa_data)) | |
743 | return 0; | |
744 | ||
e289fd28 | 745 | if (vlan->mode == MACVLAN_MODE_PASSTHRU) { |
18c8c54d | 746 | macvlan_set_addr_change(vlan->port); |
3a37a963 | 747 | return dev_set_mac_address(vlan->lowerdev, addr, NULL); |
e289fd28 | 748 | } |
749 | ||
59f997b0 MC |
750 | if (macvlan_addr_busy(vlan->port, addr->sa_data)) |
751 | return -EADDRINUSE; | |
752 | ||
e289fd28 | 753 | return macvlan_sync_address(dev, addr->sa_data); |
754 | } | |
755 | ||
b863ceb7 PM |
756 | static void macvlan_change_rx_flags(struct net_device *dev, int change) |
757 | { | |
758 | struct macvlan_dev *vlan = netdev_priv(dev); | |
759 | struct net_device *lowerdev = vlan->lowerdev; | |
760 | ||
bbeb0ead PC |
761 | if (dev->flags & IFF_UP) { |
762 | if (change & IFF_ALLMULTI) | |
763 | dev_set_allmulti(lowerdev, dev->flags & IFF_ALLMULTI ? 1 : -1); | |
efdbd2b3 VY |
764 | if (change & IFF_PROMISC) |
765 | dev_set_promiscuity(lowerdev, | |
766 | dev->flags & IFF_PROMISC ? 1 : -1); | |
767 | ||
bbeb0ead | 768 | } |
b863ceb7 PM |
769 | } |
770 | ||
9c127a01 HX |
771 | static void macvlan_compute_filter(unsigned long *mc_filter, |
772 | struct net_device *dev, | |
773 | struct macvlan_dev *vlan) | |
b863ceb7 | 774 | { |
cd431e73 | 775 | if (dev->flags & (IFF_PROMISC | IFF_ALLMULTI)) { |
9c127a01 | 776 | bitmap_fill(mc_filter, MACVLAN_MC_FILTER_SZ); |
cd431e73 ED |
777 | } else { |
778 | struct netdev_hw_addr *ha; | |
779 | DECLARE_BITMAP(filter, MACVLAN_MC_FILTER_SZ); | |
780 | ||
781 | bitmap_zero(filter, MACVLAN_MC_FILTER_SZ); | |
782 | netdev_for_each_mc_addr(ha, dev) { | |
3807ff58 | 783 | __set_bit(mc_hash(vlan, ha->addr), filter); |
cd431e73 | 784 | } |
d5270430 | 785 | |
3807ff58 | 786 | __set_bit(mc_hash(vlan, dev->broadcast), filter); |
d5270430 | 787 | |
9c127a01 | 788 | bitmap_copy(mc_filter, filter, MACVLAN_MC_FILTER_SZ); |
cd431e73 | 789 | } |
9c127a01 HX |
790 | } |
791 | ||
792 | static void macvlan_set_mac_lists(struct net_device *dev) | |
793 | { | |
794 | struct macvlan_dev *vlan = netdev_priv(dev); | |
795 | ||
796 | macvlan_compute_filter(vlan->mc_filter, dev, vlan); | |
797 | ||
df8ef8f3 | 798 | dev_uc_sync(vlan->lowerdev, dev); |
b863ceb7 | 799 | dev_mc_sync(vlan->lowerdev, dev); |
9c127a01 HX |
800 | |
801 | /* This is slightly inaccurate as we're including the subscription | |
802 | * list of vlan->lowerdev too. | |
803 | * | |
804 | * Bug alert: This only works if everyone has the same broadcast | |
805 | * address as lowerdev. As soon as someone changes theirs this | |
806 | * will break. | |
807 | * | |
808 | * However, this is already broken as when you change your broadcast | |
809 | * address we don't get called. | |
810 | * | |
811 | * The solution is to maintain a list of broadcast addresses like | |
812 | * we do for uc/mc, if you care. | |
813 | */ | |
814 | macvlan_compute_filter(vlan->port->mc_filter, vlan->lowerdev, NULL); | |
b863ceb7 PM |
815 | } |
816 | ||
817 | static int macvlan_change_mtu(struct net_device *dev, int new_mtu) | |
818 | { | |
819 | struct macvlan_dev *vlan = netdev_priv(dev); | |
820 | ||
91572088 | 821 | if (vlan->lowerdev->mtu < new_mtu) |
b863ceb7 PM |
822 | return -EINVAL; |
823 | dev->mtu = new_mtu; | |
824 | return 0; | |
825 | } | |
826 | ||
254c0a2b HL |
827 | static int macvlan_do_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) |
828 | { | |
829 | struct net_device *real_dev = macvlan_dev_real_dev(dev); | |
830 | const struct net_device_ops *ops = real_dev->netdev_ops; | |
831 | struct ifreq ifrr; | |
832 | int err = -EOPNOTSUPP; | |
833 | ||
36f18439 | 834 | strscpy(ifrr.ifr_name, real_dev->name, IFNAMSIZ); |
254c0a2b HL |
835 | ifrr.ifr_ifru = ifr->ifr_ifru; |
836 | ||
837 | switch (cmd) { | |
838 | case SIOCSHWTSTAMP: | |
6c2ea9eb HL |
839 | if (!net_eq(dev_net(dev), &init_net)) |
840 | break; | |
02596252 | 841 | /* fall through */ |
254c0a2b HL |
842 | case SIOCGHWTSTAMP: |
843 | if (netif_device_present(real_dev) && ops->ndo_do_ioctl) | |
844 | err = ops->ndo_do_ioctl(real_dev, &ifrr, cmd); | |
845 | break; | |
846 | } | |
847 | ||
848 | if (!err) | |
849 | ifr->ifr_ifru = ifrr.ifr_ifru; | |
850 | ||
851 | return err; | |
852 | } | |
853 | ||
b863ceb7 PM |
854 | /* |
855 | * macvlan network devices have devices nesting below it and are a special | |
856 | * "super class" of normal network devices; split their locks off into a | |
857 | * separate class since they always nest. | |
858 | */ | |
70957eae VY |
859 | #define ALWAYS_ON_OFFLOADS \ |
860 | (NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_GSO_SOFTWARE | \ | |
f21e5077 | 861 | NETIF_F_GSO_ROBUST | NETIF_F_GSO_ENCAP_ALL) |
8b4703e9 | 862 | |
70957eae VY |
863 | #define ALWAYS_ON_FEATURES (ALWAYS_ON_OFFLOADS | NETIF_F_LLTX) |
864 | ||
b863ceb7 | 865 | #define MACVLAN_FEATURES \ |
a188222b | 866 | (NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST | \ |
fb652fdf | 867 | NETIF_F_GSO | NETIF_F_TSO | NETIF_F_LRO | \ |
8d13e670 | 868 | NETIF_F_TSO_ECN | NETIF_F_TSO6 | NETIF_F_GRO | NETIF_F_RXCSUM | \ |
28d2b136 | 869 | NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_HW_VLAN_STAG_FILTER) |
b863ceb7 PM |
870 | |
871 | #define MACVLAN_STATE_MASK \ | |
872 | ((1<<__LINK_STATE_NOCARRIER) | (1<<__LINK_STATE_DORMANT)) | |
873 | ||
874 | static int macvlan_init(struct net_device *dev) | |
875 | { | |
876 | struct macvlan_dev *vlan = netdev_priv(dev); | |
877 | const struct net_device *lowerdev = vlan->lowerdev; | |
30837960 | 878 | struct macvlan_port *port = vlan->port; |
b863ceb7 PM |
879 | |
880 | dev->state = (dev->state & ~MACVLAN_STATE_MASK) | | |
881 | (lowerdev->state & MACVLAN_STATE_MASK); | |
882 | dev->features = lowerdev->features & MACVLAN_FEATURES; | |
8b4703e9 | 883 | dev->features |= ALWAYS_ON_FEATURES; |
62dbe830 | 884 | dev->hw_features |= NETIF_F_LRO; |
081e83a7 | 885 | dev->vlan_features = lowerdev->vlan_features & MACVLAN_FEATURES; |
70957eae | 886 | dev->vlan_features |= ALWAYS_ON_OFFLOADS; |
f21e5077 | 887 | dev->hw_enc_features |= dev->features; |
8c2acc53 | 888 | dev->gso_max_size = lowerdev->gso_max_size; |
f6773c5e | 889 | dev->gso_max_segs = lowerdev->gso_max_segs; |
ef5c8996 | 890 | dev->hard_header_len = lowerdev->hard_header_len; |
b863ceb7 | 891 | |
1c213bd2 | 892 | vlan->pcpu_stats = netdev_alloc_pcpu_stats(struct vlan_pcpu_stats); |
8ffab51b | 893 | if (!vlan->pcpu_stats) |
fccaf710 ED |
894 | return -ENOMEM; |
895 | ||
30837960 FR |
896 | port->count += 1; |
897 | ||
b863ceb7 PM |
898 | return 0; |
899 | } | |
900 | ||
fccaf710 ED |
901 | static void macvlan_uninit(struct net_device *dev) |
902 | { | |
903 | struct macvlan_dev *vlan = netdev_priv(dev); | |
d5cd9244 | 904 | struct macvlan_port *port = vlan->port; |
fccaf710 | 905 | |
8ffab51b | 906 | free_percpu(vlan->pcpu_stats); |
d5cd9244 | 907 | |
79cf79ab | 908 | macvlan_flush_sources(port, vlan); |
5e3c516b DM |
909 | port->count -= 1; |
910 | if (!port->count) | |
d5cd9244 | 911 | macvlan_port_destroy(port->dev); |
fccaf710 ED |
912 | } |
913 | ||
bc1f4470 | 914 | static void macvlan_dev_get_stats64(struct net_device *dev, |
915 | struct rtnl_link_stats64 *stats) | |
fccaf710 | 916 | { |
fccaf710 ED |
917 | struct macvlan_dev *vlan = netdev_priv(dev); |
918 | ||
8ffab51b | 919 | if (vlan->pcpu_stats) { |
cdf3e274 | 920 | struct vlan_pcpu_stats *p; |
8ffab51b ED |
921 | u64 rx_packets, rx_bytes, rx_multicast, tx_packets, tx_bytes; |
922 | u32 rx_errors = 0, tx_dropped = 0; | |
bc66154e | 923 | unsigned int start; |
fccaf710 ED |
924 | int i; |
925 | ||
926 | for_each_possible_cpu(i) { | |
8ffab51b | 927 | p = per_cpu_ptr(vlan->pcpu_stats, i); |
bc66154e | 928 | do { |
57a7744e | 929 | start = u64_stats_fetch_begin_irq(&p->syncp); |
bc66154e ED |
930 | rx_packets = p->rx_packets; |
931 | rx_bytes = p->rx_bytes; | |
932 | rx_multicast = p->rx_multicast; | |
8ffab51b ED |
933 | tx_packets = p->tx_packets; |
934 | tx_bytes = p->tx_bytes; | |
57a7744e | 935 | } while (u64_stats_fetch_retry_irq(&p->syncp, start)); |
8ffab51b ED |
936 | |
937 | stats->rx_packets += rx_packets; | |
938 | stats->rx_bytes += rx_bytes; | |
939 | stats->multicast += rx_multicast; | |
940 | stats->tx_packets += tx_packets; | |
941 | stats->tx_bytes += tx_bytes; | |
942 | /* rx_errors & tx_dropped are u32, updated | |
943 | * without syncp protection. | |
944 | */ | |
945 | rx_errors += p->rx_errors; | |
946 | tx_dropped += p->tx_dropped; | |
fccaf710 | 947 | } |
8ffab51b ED |
948 | stats->rx_errors = rx_errors; |
949 | stats->rx_dropped = rx_errors; | |
950 | stats->tx_dropped = tx_dropped; | |
fccaf710 | 951 | } |
fccaf710 ED |
952 | } |
953 | ||
8e586137 | 954 | static int macvlan_vlan_rx_add_vid(struct net_device *dev, |
80d5c368 | 955 | __be16 proto, u16 vid) |
8d13e670 JF |
956 | { |
957 | struct macvlan_dev *vlan = netdev_priv(dev); | |
958 | struct net_device *lowerdev = vlan->lowerdev; | |
8d13e670 | 959 | |
80d5c368 | 960 | return vlan_vid_add(lowerdev, proto, vid); |
8d13e670 JF |
961 | } |
962 | ||
8e586137 | 963 | static int macvlan_vlan_rx_kill_vid(struct net_device *dev, |
80d5c368 | 964 | __be16 proto, u16 vid) |
8d13e670 JF |
965 | { |
966 | struct macvlan_dev *vlan = netdev_priv(dev); | |
967 | struct net_device *lowerdev = vlan->lowerdev; | |
8d13e670 | 968 | |
80d5c368 | 969 | vlan_vid_del(lowerdev, proto, vid); |
8e586137 | 970 | return 0; |
8d13e670 JF |
971 | } |
972 | ||
edc7d573 | 973 | static int macvlan_fdb_add(struct ndmsg *ndm, struct nlattr *tb[], |
df8ef8f3 | 974 | struct net_device *dev, |
f6f6424b | 975 | const unsigned char *addr, u16 vid, |
87b0984e PM |
976 | u16 flags, |
977 | struct netlink_ext_ack *extack) | |
df8ef8f3 JF |
978 | { |
979 | struct macvlan_dev *vlan = netdev_priv(dev); | |
980 | int err = -EINVAL; | |
981 | ||
8a50f11c VY |
982 | /* Support unicast filter only on passthru devices. |
983 | * Multicast filter should be allowed on all devices. | |
984 | */ | |
43c2d578 | 985 | if (!macvlan_passthru(vlan->port) && is_unicast_ether_addr(addr)) |
df8ef8f3 JF |
986 | return -EOPNOTSUPP; |
987 | ||
ab2cfbb2 TR |
988 | if (flags & NLM_F_REPLACE) |
989 | return -EOPNOTSUPP; | |
990 | ||
df8ef8f3 JF |
991 | if (is_unicast_ether_addr(addr)) |
992 | err = dev_uc_add_excl(dev, addr); | |
993 | else if (is_multicast_ether_addr(addr)) | |
994 | err = dev_mc_add_excl(dev, addr); | |
995 | ||
996 | return err; | |
997 | } | |
998 | ||
1690be63 | 999 | static int macvlan_fdb_del(struct ndmsg *ndm, struct nlattr *tb[], |
df8ef8f3 | 1000 | struct net_device *dev, |
f6f6424b | 1001 | const unsigned char *addr, u16 vid) |
df8ef8f3 JF |
1002 | { |
1003 | struct macvlan_dev *vlan = netdev_priv(dev); | |
1004 | int err = -EINVAL; | |
1005 | ||
8a50f11c VY |
1006 | /* Support unicast filter only on passthru devices. |
1007 | * Multicast filter should be allowed on all devices. | |
1008 | */ | |
43c2d578 | 1009 | if (!macvlan_passthru(vlan->port) && is_unicast_ether_addr(addr)) |
df8ef8f3 JF |
1010 | return -EOPNOTSUPP; |
1011 | ||
1012 | if (is_unicast_ether_addr(addr)) | |
1013 | err = dev_uc_del(dev, addr); | |
1014 | else if (is_multicast_ether_addr(addr)) | |
1015 | err = dev_mc_del(dev, addr); | |
1016 | ||
1017 | return err; | |
1018 | } | |
1019 | ||
b863ceb7 PM |
1020 | static void macvlan_ethtool_get_drvinfo(struct net_device *dev, |
1021 | struct ethtool_drvinfo *drvinfo) | |
1022 | { | |
7826d43f JP |
1023 | strlcpy(drvinfo->driver, "macvlan", sizeof(drvinfo->driver)); |
1024 | strlcpy(drvinfo->version, "0.1", sizeof(drvinfo->version)); | |
b863ceb7 PM |
1025 | } |
1026 | ||
85f95819 DD |
1027 | static int macvlan_ethtool_get_link_ksettings(struct net_device *dev, |
1028 | struct ethtool_link_ksettings *cmd) | |
9edb8bb6 SH |
1029 | { |
1030 | const struct macvlan_dev *vlan = netdev_priv(dev); | |
4bc71cb9 | 1031 | |
85f95819 | 1032 | return __ethtool_get_link_ksettings(vlan->lowerdev, cmd); |
9edb8bb6 SH |
1033 | } |
1034 | ||
254c0a2b HL |
1035 | static int macvlan_ethtool_get_ts_info(struct net_device *dev, |
1036 | struct ethtool_ts_info *info) | |
1037 | { | |
1038 | struct net_device *real_dev = macvlan_dev_real_dev(dev); | |
1039 | const struct ethtool_ops *ops = real_dev->ethtool_ops; | |
1040 | struct phy_device *phydev = real_dev->phydev; | |
1041 | ||
d25de984 RC |
1042 | if (phy_has_tsinfo(phydev)) { |
1043 | return phy_ts_info(phydev, info); | |
254c0a2b HL |
1044 | } else if (ops->get_ts_info) { |
1045 | return ops->get_ts_info(real_dev, info); | |
1046 | } else { | |
1047 | info->so_timestamping = SOF_TIMESTAMPING_RX_SOFTWARE | | |
1048 | SOF_TIMESTAMPING_SOFTWARE; | |
1049 | info->phc_index = -1; | |
1050 | } | |
1051 | ||
1052 | return 0; | |
1053 | } | |
1054 | ||
2be5c767 VY |
1055 | static netdev_features_t macvlan_fix_features(struct net_device *dev, |
1056 | netdev_features_t features) | |
1057 | { | |
1058 | struct macvlan_dev *vlan = netdev_priv(dev); | |
62dbe830 | 1059 | netdev_features_t lowerdev_features = vlan->lowerdev->features; |
797f87f8 | 1060 | netdev_features_t mask; |
2be5c767 | 1061 | |
797f87f8 FW |
1062 | features |= NETIF_F_ALL_FOR_ALL; |
1063 | features &= (vlan->set_features | ~MACVLAN_FEATURES); | |
1064 | mask = features; | |
1065 | ||
62dbe830 MK |
1066 | lowerdev_features &= (features | ~NETIF_F_LRO); |
1067 | features = netdev_increment_features(lowerdev_features, features, mask); | |
8b4703e9 | 1068 | features |= ALWAYS_ON_FEATURES; |
13fbcc8d | 1069 | features &= (ALWAYS_ON_FEATURES | MACVLAN_FEATURES); |
797f87f8 FW |
1070 | |
1071 | return features; | |
2be5c767 VY |
1072 | } |
1073 | ||
688cea83 | 1074 | #ifdef CONFIG_NET_POLL_CONTROLLER |
1075 | static void macvlan_dev_poll_controller(struct net_device *dev) | |
1076 | { | |
1077 | return; | |
1078 | } | |
1079 | ||
1080 | static int macvlan_dev_netpoll_setup(struct net_device *dev, struct netpoll_info *npinfo) | |
1081 | { | |
1082 | struct macvlan_dev *vlan = netdev_priv(dev); | |
1083 | struct net_device *real_dev = vlan->lowerdev; | |
1084 | struct netpoll *netpoll; | |
1085 | int err = 0; | |
1086 | ||
1087 | netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL); | |
1088 | err = -ENOMEM; | |
1089 | if (!netpoll) | |
1090 | goto out; | |
1091 | ||
1092 | err = __netpoll_setup(netpoll, real_dev); | |
1093 | if (err) { | |
1094 | kfree(netpoll); | |
1095 | goto out; | |
1096 | } | |
1097 | ||
1098 | vlan->netpoll = netpoll; | |
1099 | ||
1100 | out: | |
1101 | return err; | |
1102 | } | |
1103 | ||
1104 | static void macvlan_dev_netpoll_cleanup(struct net_device *dev) | |
1105 | { | |
1106 | struct macvlan_dev *vlan = netdev_priv(dev); | |
1107 | struct netpoll *netpoll = vlan->netpoll; | |
1108 | ||
1109 | if (!netpoll) | |
1110 | return; | |
1111 | ||
1112 | vlan->netpoll = NULL; | |
1113 | ||
c9fbd71f | 1114 | __netpoll_free(netpoll); |
688cea83 | 1115 | } |
1116 | #endif /* CONFIG_NET_POLL_CONTROLLER */ | |
1117 | ||
ef5fa6bc ND |
1118 | static int macvlan_dev_get_iflink(const struct net_device *dev) |
1119 | { | |
1120 | struct macvlan_dev *vlan = netdev_priv(dev); | |
1121 | ||
1122 | return vlan->lowerdev->ifindex; | |
1123 | } | |
1124 | ||
b863ceb7 PM |
1125 | static const struct ethtool_ops macvlan_ethtool_ops = { |
1126 | .get_link = ethtool_op_get_link, | |
85f95819 | 1127 | .get_link_ksettings = macvlan_ethtool_get_link_ksettings, |
b863ceb7 | 1128 | .get_drvinfo = macvlan_ethtool_get_drvinfo, |
254c0a2b | 1129 | .get_ts_info = macvlan_ethtool_get_ts_info, |
b863ceb7 PM |
1130 | }; |
1131 | ||
54a30c97 SH |
1132 | static const struct net_device_ops macvlan_netdev_ops = { |
1133 | .ndo_init = macvlan_init, | |
fccaf710 | 1134 | .ndo_uninit = macvlan_uninit, |
54a30c97 SH |
1135 | .ndo_open = macvlan_open, |
1136 | .ndo_stop = macvlan_stop, | |
00829823 | 1137 | .ndo_start_xmit = macvlan_start_xmit, |
54a30c97 | 1138 | .ndo_change_mtu = macvlan_change_mtu, |
254c0a2b | 1139 | .ndo_do_ioctl = macvlan_do_ioctl, |
2be5c767 | 1140 | .ndo_fix_features = macvlan_fix_features, |
54a30c97 SH |
1141 | .ndo_change_rx_flags = macvlan_change_rx_flags, |
1142 | .ndo_set_mac_address = macvlan_set_mac_address, | |
df8ef8f3 | 1143 | .ndo_set_rx_mode = macvlan_set_mac_lists, |
bc66154e | 1144 | .ndo_get_stats64 = macvlan_dev_get_stats64, |
54a30c97 | 1145 | .ndo_validate_addr = eth_validate_addr, |
8d13e670 JF |
1146 | .ndo_vlan_rx_add_vid = macvlan_vlan_rx_add_vid, |
1147 | .ndo_vlan_rx_kill_vid = macvlan_vlan_rx_kill_vid, | |
df8ef8f3 JF |
1148 | .ndo_fdb_add = macvlan_fdb_add, |
1149 | .ndo_fdb_del = macvlan_fdb_del, | |
1150 | .ndo_fdb_dump = ndo_dflt_fdb_dump, | |
688cea83 | 1151 | #ifdef CONFIG_NET_POLL_CONTROLLER |
1152 | .ndo_poll_controller = macvlan_dev_poll_controller, | |
1153 | .ndo_netpoll_setup = macvlan_dev_netpoll_setup, | |
1154 | .ndo_netpoll_cleanup = macvlan_dev_netpoll_cleanup, | |
1155 | #endif | |
ef5fa6bc | 1156 | .ndo_get_iflink = macvlan_dev_get_iflink, |
f56e67b5 | 1157 | .ndo_features_check = passthru_features_check, |
2e8b4ba6 | 1158 | .ndo_change_proto_down = dev_change_proto_down_generic, |
54a30c97 SH |
1159 | }; |
1160 | ||
8a35747a | 1161 | void macvlan_common_setup(struct net_device *dev) |
b863ceb7 PM |
1162 | { |
1163 | ether_setup(dev); | |
1164 | ||
91572088 JW |
1165 | dev->min_mtu = 0; |
1166 | dev->max_mtu = ETH_MAX_MTU; | |
02875878 ED |
1167 | dev->priv_flags &= ~IFF_TX_SKB_SHARING; |
1168 | netif_keep_dst(dev); | |
87ab7f6f | 1169 | dev->priv_flags |= IFF_UNICAST_FLT; |
54a30c97 | 1170 | dev->netdev_ops = &macvlan_netdev_ops; |
cf124db5 | 1171 | dev->needs_free_netdev = true; |
71740129 | 1172 | dev->header_ops = &macvlan_hard_header_ops; |
b863ceb7 | 1173 | dev->ethtool_ops = &macvlan_ethtool_ops; |
8a35747a HX |
1174 | } |
1175 | EXPORT_SYMBOL_GPL(macvlan_common_setup); | |
1176 | ||
1177 | static void macvlan_setup(struct net_device *dev) | |
1178 | { | |
1179 | macvlan_common_setup(dev); | |
7009212b | 1180 | dev->priv_flags |= IFF_NO_QUEUE; |
b863ceb7 PM |
1181 | } |
1182 | ||
1183 | static int macvlan_port_create(struct net_device *dev) | |
1184 | { | |
1185 | struct macvlan_port *port; | |
1186 | unsigned int i; | |
ab95bfe0 | 1187 | int err; |
b863ceb7 PM |
1188 | |
1189 | if (dev->type != ARPHRD_ETHER || dev->flags & IFF_LOOPBACK) | |
1190 | return -EINVAL; | |
1191 | ||
322dc6e0 | 1192 | if (netdev_is_rx_handler_busy(dev)) |
d6b00fec MB |
1193 | return -EBUSY; |
1194 | ||
b863ceb7 PM |
1195 | port = kzalloc(sizeof(*port), GFP_KERNEL); |
1196 | if (port == NULL) | |
1197 | return -ENOMEM; | |
1198 | ||
1199 | port->dev = dev; | |
18c8c54d | 1200 | ether_addr_copy(port->perm_addr, dev->dev_addr); |
b863ceb7 PM |
1201 | INIT_LIST_HEAD(&port->vlans); |
1202 | for (i = 0; i < MACVLAN_HASH_SIZE; i++) | |
1203 | INIT_HLIST_HEAD(&port->vlan_hash[i]); | |
79cf79ab MB |
1204 | for (i = 0; i < MACVLAN_HASH_SIZE; i++) |
1205 | INIT_HLIST_HEAD(&port->vlan_source_hash[i]); | |
ab95bfe0 | 1206 | |
412ca155 HX |
1207 | skb_queue_head_init(&port->bc_queue); |
1208 | INIT_WORK(&port->bc_work, macvlan_process_broadcast); | |
1209 | ||
a35e2c1b JP |
1210 | err = netdev_rx_handler_register(dev, macvlan_handle_frame, port); |
1211 | if (err) | |
ab95bfe0 | 1212 | kfree(port); |
d9351561 ED |
1213 | else |
1214 | dev->priv_flags |= IFF_MACVLAN_PORT; | |
ab95bfe0 | 1215 | return err; |
b863ceb7 PM |
1216 | } |
1217 | ||
1218 | static void macvlan_port_destroy(struct net_device *dev) | |
1219 | { | |
e052f7e6 | 1220 | struct macvlan_port *port = macvlan_port_get_rtnl(dev); |
f6478218 | 1221 | struct sk_buff *skb; |
b863ceb7 | 1222 | |
a35e2c1b | 1223 | dev->priv_flags &= ~IFF_MACVLAN_PORT; |
ab95bfe0 | 1224 | netdev_rx_handler_unregister(dev); |
fe0ca732 ED |
1225 | |
1226 | /* After this point, no packet can schedule bc_work anymore, | |
1227 | * but we need to cancel it and purge left skbs if any. | |
1228 | */ | |
1229 | cancel_work_sync(&port->bc_work); | |
f6478218 HX |
1230 | |
1231 | while ((skb = __skb_dequeue(&port->bc_queue))) { | |
1232 | const struct macvlan_dev *src = MACVLAN_SKB_CB(skb)->src; | |
1233 | ||
1234 | if (src) | |
1235 | dev_put(src->dev); | |
1236 | ||
1237 | kfree_skb(skb); | |
1238 | } | |
fe0ca732 | 1239 | |
18c8c54d VY |
1240 | /* If the lower device address has been changed by passthru |
1241 | * macvlan, put it back. | |
1242 | */ | |
1243 | if (macvlan_passthru(port) && | |
1244 | !ether_addr_equal(port->dev->dev_addr, port->perm_addr)) { | |
1245 | struct sockaddr sa; | |
1246 | ||
1247 | sa.sa_family = port->dev->type; | |
1248 | memcpy(&sa.sa_data, port->perm_addr, port->dev->addr_len); | |
3a37a963 | 1249 | dev_set_mac_address(port->dev, &sa, NULL); |
18c8c54d VY |
1250 | } |
1251 | ||
a1f5315c | 1252 | kfree(port); |
b863ceb7 PM |
1253 | } |
1254 | ||
a8b8a889 MS |
1255 | static int macvlan_validate(struct nlattr *tb[], struct nlattr *data[], |
1256 | struct netlink_ext_ack *extack) | |
b863ceb7 PM |
1257 | { |
1258 | if (tb[IFLA_ADDRESS]) { | |
1259 | if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) | |
1260 | return -EINVAL; | |
1261 | if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) | |
1262 | return -EADDRNOTAVAIL; | |
1263 | } | |
27c0b1a8 | 1264 | |
07850a4f ZS |
1265 | if (!data) |
1266 | return 0; | |
1267 | ||
1268 | if (data[IFLA_MACVLAN_FLAGS] && | |
15127478 MT |
1269 | nla_get_u16(data[IFLA_MACVLAN_FLAGS]) & ~MACVLAN_FLAG_NOPROMISC) |
1270 | return -EINVAL; | |
1271 | ||
07850a4f | 1272 | if (data[IFLA_MACVLAN_MODE]) { |
27c0b1a8 AB |
1273 | switch (nla_get_u32(data[IFLA_MACVLAN_MODE])) { |
1274 | case MACVLAN_MODE_PRIVATE: | |
1275 | case MACVLAN_MODE_VEPA: | |
1276 | case MACVLAN_MODE_BRIDGE: | |
eb06acdc | 1277 | case MACVLAN_MODE_PASSTHRU: |
79cf79ab MB |
1278 | case MACVLAN_MODE_SOURCE: |
1279 | break; | |
1280 | default: | |
1281 | return -EINVAL; | |
1282 | } | |
1283 | } | |
1284 | ||
07850a4f | 1285 | if (data[IFLA_MACVLAN_MACADDR_MODE]) { |
79cf79ab MB |
1286 | switch (nla_get_u32(data[IFLA_MACVLAN_MACADDR_MODE])) { |
1287 | case MACVLAN_MACADDR_ADD: | |
1288 | case MACVLAN_MACADDR_DEL: | |
1289 | case MACVLAN_MACADDR_FLUSH: | |
1290 | case MACVLAN_MACADDR_SET: | |
27c0b1a8 AB |
1291 | break; |
1292 | default: | |
1293 | return -EINVAL; | |
1294 | } | |
1295 | } | |
79cf79ab | 1296 | |
07850a4f | 1297 | if (data[IFLA_MACVLAN_MACADDR]) { |
79cf79ab MB |
1298 | if (nla_len(data[IFLA_MACVLAN_MACADDR]) != ETH_ALEN) |
1299 | return -EINVAL; | |
1300 | ||
1301 | if (!is_valid_ether_addr(nla_data(data[IFLA_MACVLAN_MACADDR]))) | |
1302 | return -EADDRNOTAVAIL; | |
1303 | } | |
1304 | ||
07850a4f | 1305 | if (data[IFLA_MACVLAN_MACADDR_COUNT]) |
79cf79ab MB |
1306 | return -EINVAL; |
1307 | ||
1308 | return 0; | |
1309 | } | |
1310 | ||
1311 | /** | |
1312 | * reconfigure list of remote source mac address | |
1313 | * (only for macvlan devices in source mode) | |
1314 | * Note regarding alignment: all netlink data is aligned to 4 Byte, which | |
1315 | * suffices for both ether_addr_copy and ether_addr_equal_64bits usage. | |
1316 | */ | |
1317 | static int macvlan_changelink_sources(struct macvlan_dev *vlan, u32 mode, | |
1318 | struct nlattr *data[]) | |
1319 | { | |
1320 | char *addr = NULL; | |
1321 | int ret, rem, len; | |
1322 | struct nlattr *nla, *head; | |
1323 | struct macvlan_source_entry *entry; | |
1324 | ||
1325 | if (data[IFLA_MACVLAN_MACADDR]) | |
1326 | addr = nla_data(data[IFLA_MACVLAN_MACADDR]); | |
1327 | ||
1328 | if (mode == MACVLAN_MACADDR_ADD) { | |
1329 | if (!addr) | |
1330 | return -EINVAL; | |
1331 | ||
1332 | return macvlan_hash_add_source(vlan, addr); | |
1333 | ||
1334 | } else if (mode == MACVLAN_MACADDR_DEL) { | |
1335 | if (!addr) | |
1336 | return -EINVAL; | |
1337 | ||
1338 | entry = macvlan_hash_lookup_source(vlan, addr); | |
1339 | if (entry) { | |
1340 | macvlan_hash_del_source(entry); | |
1341 | vlan->macaddr_count--; | |
1342 | } | |
1343 | } else if (mode == MACVLAN_MACADDR_FLUSH) { | |
1344 | macvlan_flush_sources(vlan->port, vlan); | |
1345 | } else if (mode == MACVLAN_MACADDR_SET) { | |
1346 | macvlan_flush_sources(vlan->port, vlan); | |
1347 | ||
1348 | if (addr) { | |
1349 | ret = macvlan_hash_add_source(vlan, addr); | |
1350 | if (ret) | |
1351 | return ret; | |
1352 | } | |
1353 | ||
1354 | if (!data || !data[IFLA_MACVLAN_MACADDR_DATA]) | |
1355 | return 0; | |
1356 | ||
1357 | head = nla_data(data[IFLA_MACVLAN_MACADDR_DATA]); | |
1358 | len = nla_len(data[IFLA_MACVLAN_MACADDR_DATA]); | |
1359 | ||
1360 | nla_for_each_attr(nla, head, len, rem) { | |
1361 | if (nla_type(nla) != IFLA_MACVLAN_MACADDR || | |
1362 | nla_len(nla) != ETH_ALEN) | |
1363 | continue; | |
1364 | ||
1365 | addr = nla_data(nla); | |
1366 | ret = macvlan_hash_add_source(vlan, addr); | |
1367 | if (ret) | |
1368 | return ret; | |
1369 | } | |
1370 | } else { | |
1371 | return -EINVAL; | |
1372 | } | |
1373 | ||
b863ceb7 PM |
1374 | return 0; |
1375 | } | |
1376 | ||
fc0663d6 | 1377 | int macvlan_common_newlink(struct net *src_net, struct net_device *dev, |
42ab19ee DA |
1378 | struct nlattr *tb[], struct nlattr *data[], |
1379 | struct netlink_ext_ack *extack) | |
b863ceb7 PM |
1380 | { |
1381 | struct macvlan_dev *vlan = netdev_priv(dev); | |
1382 | struct macvlan_port *port; | |
1383 | struct net_device *lowerdev; | |
1384 | int err; | |
79cf79ab | 1385 | int macmode; |
aa5fd0fb | 1386 | bool create = false; |
b863ceb7 PM |
1387 | |
1388 | if (!tb[IFLA_LINK]) | |
1389 | return -EINVAL; | |
1390 | ||
81adee47 | 1391 | lowerdev = __dev_get_by_index(src_net, nla_get_u32(tb[IFLA_LINK])); |
b863ceb7 PM |
1392 | if (lowerdev == NULL) |
1393 | return -ENODEV; | |
1394 | ||
d70f2cf5 | 1395 | /* When creating macvlans or macvtaps on top of other macvlans - use |
b0832a29 | 1396 | * the real device as the lowerdev. |
a6ca5f1d | 1397 | */ |
d70f2cf5 KW |
1398 | if (netif_is_macvlan(lowerdev)) |
1399 | lowerdev = macvlan_dev_real_dev(lowerdev); | |
a6ca5f1d | 1400 | |
b863ceb7 PM |
1401 | if (!tb[IFLA_MTU]) |
1402 | dev->mtu = lowerdev->mtu; | |
1403 | else if (dev->mtu > lowerdev->mtu) | |
1404 | return -EINVAL; | |
1405 | ||
91572088 JW |
1406 | /* MTU range: 68 - lowerdev->max_mtu */ |
1407 | dev->min_mtu = ETH_MIN_MTU; | |
1408 | dev->max_mtu = lowerdev->max_mtu; | |
1409 | ||
b863ceb7 | 1410 | if (!tb[IFLA_ADDRESS]) |
7ce5d222 | 1411 | eth_hw_addr_random(dev); |
b863ceb7 | 1412 | |
913564fb | 1413 | if (!netif_is_macvlan_port(lowerdev)) { |
b863ceb7 PM |
1414 | err = macvlan_port_create(lowerdev); |
1415 | if (err < 0) | |
1416 | return err; | |
aa5fd0fb | 1417 | create = true; |
b863ceb7 | 1418 | } |
e052f7e6 | 1419 | port = macvlan_port_get_rtnl(lowerdev); |
b863ceb7 | 1420 | |
eb06acdc | 1421 | /* Only 1 macvlan device can be created in passthru mode */ |
43c2d578 | 1422 | if (macvlan_passthru(port)) { |
aa5fd0fb GF |
1423 | /* The macvlan port must be not created this time, |
1424 | * still goto destroy_macvlan_port for readability. | |
1425 | */ | |
1426 | err = -EINVAL; | |
1427 | goto destroy_macvlan_port; | |
1428 | } | |
eb06acdc | 1429 | |
b863ceb7 PM |
1430 | vlan->lowerdev = lowerdev; |
1431 | vlan->dev = dev; | |
1432 | vlan->port = port; | |
2be5c767 | 1433 | vlan->set_features = MACVLAN_FEATURES; |
b863ceb7 | 1434 | |
27c0b1a8 AB |
1435 | vlan->mode = MACVLAN_MODE_VEPA; |
1436 | if (data && data[IFLA_MACVLAN_MODE]) | |
1437 | vlan->mode = nla_get_u32(data[IFLA_MACVLAN_MODE]); | |
1438 | ||
df8ef8f3 JF |
1439 | if (data && data[IFLA_MACVLAN_FLAGS]) |
1440 | vlan->flags = nla_get_u16(data[IFLA_MACVLAN_FLAGS]); | |
1441 | ||
eb06acdc | 1442 | if (vlan->mode == MACVLAN_MODE_PASSTHRU) { |
aa5fd0fb GF |
1443 | if (port->count) { |
1444 | err = -EINVAL; | |
1445 | goto destroy_macvlan_port; | |
1446 | } | |
43c2d578 | 1447 | macvlan_set_passthru(port); |
8b98604e | 1448 | eth_hw_addr_inherit(dev, lowerdev); |
eb06acdc SS |
1449 | } |
1450 | ||
79cf79ab | 1451 | if (data && data[IFLA_MACVLAN_MACADDR_MODE]) { |
aa5fd0fb GF |
1452 | if (vlan->mode != MACVLAN_MODE_SOURCE) { |
1453 | err = -EINVAL; | |
1454 | goto destroy_macvlan_port; | |
1455 | } | |
79cf79ab MB |
1456 | macmode = nla_get_u32(data[IFLA_MACVLAN_MACADDR_MODE]); |
1457 | err = macvlan_changelink_sources(vlan, macmode, data); | |
1458 | if (err) | |
aa5fd0fb | 1459 | goto destroy_macvlan_port; |
79cf79ab MB |
1460 | } |
1461 | ||
47d4ab91 JF |
1462 | err = register_netdevice(dev); |
1463 | if (err < 0) | |
aa5fd0fb | 1464 | goto destroy_macvlan_port; |
47d4ab91 | 1465 | |
a6cc0cfa | 1466 | dev->priv_flags |= IFF_MACVLAN; |
42ab19ee | 1467 | err = netdev_upper_dev_link(lowerdev, dev, extack); |
7cd43db7 | 1468 | if (err) |
da37705c | 1469 | goto unregister_netdev; |
b863ceb7 | 1470 | |
233c7df0 | 1471 | list_add_tail_rcu(&vlan->list, &port->vlans); |
fc4a7489 | 1472 | netif_stacked_transfer_operstate(lowerdev, dev); |
de7d244d | 1473 | linkwatch_fire_event(dev); |
f16d3d57 | 1474 | |
b863ceb7 | 1475 | return 0; |
f16d3d57 | 1476 | |
da37705c | 1477 | unregister_netdev: |
d02fd6e7 | 1478 | /* macvlan_uninit would free the macvlan port */ |
da37705c | 1479 | unregister_netdevice(dev); |
d02fd6e7 | 1480 | return err; |
aa5fd0fb | 1481 | destroy_macvlan_port: |
d02fd6e7 GF |
1482 | /* the macvlan port may be freed by macvlan_uninit when fail to register. |
1483 | * so we destroy the macvlan port only when it's valid. | |
1484 | */ | |
4e14bf42 | 1485 | if (create && macvlan_port_get_rtnl(lowerdev)) |
aa5fd0fb | 1486 | macvlan_port_destroy(port->dev); |
f16d3d57 | 1487 | return err; |
b863ceb7 | 1488 | } |
fc0663d6 | 1489 | EXPORT_SYMBOL_GPL(macvlan_common_newlink); |
b863ceb7 | 1490 | |
fc0663d6 | 1491 | static int macvlan_newlink(struct net *src_net, struct net_device *dev, |
7a3f4a18 MS |
1492 | struct nlattr *tb[], struct nlattr *data[], |
1493 | struct netlink_ext_ack *extack) | |
fc0663d6 | 1494 | { |
42ab19ee | 1495 | return macvlan_common_newlink(src_net, dev, tb, data, extack); |
fc0663d6 AB |
1496 | } |
1497 | ||
1498 | void macvlan_dellink(struct net_device *dev, struct list_head *head) | |
b863ceb7 PM |
1499 | { |
1500 | struct macvlan_dev *vlan = netdev_priv(dev); | |
b863ceb7 | 1501 | |
79cf79ab MB |
1502 | if (vlan->mode == MACVLAN_MODE_SOURCE) |
1503 | macvlan_flush_sources(vlan->port, vlan); | |
233c7df0 | 1504 | list_del_rcu(&vlan->list); |
23289a37 | 1505 | unregister_netdevice_queue(dev, head); |
7cd43db7 | 1506 | netdev_upper_dev_unlink(vlan->lowerdev, dev); |
b863ceb7 | 1507 | } |
fc0663d6 | 1508 | EXPORT_SYMBOL_GPL(macvlan_dellink); |
b863ceb7 | 1509 | |
27c0b1a8 | 1510 | static int macvlan_changelink(struct net_device *dev, |
ad744b22 MS |
1511 | struct nlattr *tb[], struct nlattr *data[], |
1512 | struct netlink_ext_ack *extack) | |
27c0b1a8 AB |
1513 | { |
1514 | struct macvlan_dev *vlan = netdev_priv(dev); | |
266e8347 MT |
1515 | enum macvlan_mode mode; |
1516 | bool set_mode = false; | |
79cf79ab MB |
1517 | enum macvlan_macaddr_mode macmode; |
1518 | int ret; | |
266e8347 MT |
1519 | |
1520 | /* Validate mode, but don't set yet: setting flags may fail. */ | |
1521 | if (data && data[IFLA_MACVLAN_MODE]) { | |
1522 | set_mode = true; | |
1523 | mode = nla_get_u32(data[IFLA_MACVLAN_MODE]); | |
1524 | /* Passthrough mode can't be set or cleared dynamically */ | |
1525 | if ((mode == MACVLAN_MODE_PASSTHRU) != | |
1526 | (vlan->mode == MACVLAN_MODE_PASSTHRU)) | |
1527 | return -EINVAL; | |
79cf79ab MB |
1528 | if (vlan->mode == MACVLAN_MODE_SOURCE && |
1529 | vlan->mode != mode) | |
1530 | macvlan_flush_sources(vlan->port, vlan); | |
266e8347 | 1531 | } |
99ffc3e7 | 1532 | |
df8ef8f3 JF |
1533 | if (data && data[IFLA_MACVLAN_FLAGS]) { |
1534 | __u16 flags = nla_get_u16(data[IFLA_MACVLAN_FLAGS]); | |
1535 | bool promisc = (flags ^ vlan->flags) & MACVLAN_FLAG_NOPROMISC; | |
43c2d578 | 1536 | if (macvlan_passthru(vlan->port) && promisc) { |
99ffc3e7 MT |
1537 | int err; |
1538 | ||
1539 | if (flags & MACVLAN_FLAG_NOPROMISC) | |
1540 | err = dev_set_promiscuity(vlan->lowerdev, -1); | |
1541 | else | |
1542 | err = dev_set_promiscuity(vlan->lowerdev, 1); | |
1543 | if (err < 0) | |
1544 | return err; | |
1545 | } | |
df8ef8f3 JF |
1546 | vlan->flags = flags; |
1547 | } | |
266e8347 MT |
1548 | if (set_mode) |
1549 | vlan->mode = mode; | |
79cf79ab MB |
1550 | if (data && data[IFLA_MACVLAN_MACADDR_MODE]) { |
1551 | if (vlan->mode != MACVLAN_MODE_SOURCE) | |
1552 | return -EINVAL; | |
1553 | macmode = nla_get_u32(data[IFLA_MACVLAN_MACADDR_MODE]); | |
1554 | ret = macvlan_changelink_sources(vlan, macmode, data); | |
1555 | if (ret) | |
1556 | return ret; | |
1557 | } | |
27c0b1a8 AB |
1558 | return 0; |
1559 | } | |
1560 | ||
79cf79ab MB |
1561 | static size_t macvlan_get_size_mac(const struct macvlan_dev *vlan) |
1562 | { | |
1563 | if (vlan->macaddr_count == 0) | |
1564 | return 0; | |
1565 | return nla_total_size(0) /* IFLA_MACVLAN_MACADDR_DATA */ | |
1566 | + vlan->macaddr_count * nla_total_size(sizeof(u8) * ETH_ALEN); | |
1567 | } | |
1568 | ||
27c0b1a8 AB |
1569 | static size_t macvlan_get_size(const struct net_device *dev) |
1570 | { | |
79cf79ab MB |
1571 | struct macvlan_dev *vlan = netdev_priv(dev); |
1572 | ||
01fe944f ED |
1573 | return (0 |
1574 | + nla_total_size(4) /* IFLA_MACVLAN_MODE */ | |
1575 | + nla_total_size(2) /* IFLA_MACVLAN_FLAGS */ | |
79cf79ab MB |
1576 | + nla_total_size(4) /* IFLA_MACVLAN_MACADDR_COUNT */ |
1577 | + macvlan_get_size_mac(vlan) /* IFLA_MACVLAN_MACADDR */ | |
01fe944f | 1578 | ); |
27c0b1a8 AB |
1579 | } |
1580 | ||
79cf79ab MB |
1581 | static int macvlan_fill_info_macaddr(struct sk_buff *skb, |
1582 | const struct macvlan_dev *vlan, | |
1583 | const int i) | |
1584 | { | |
1585 | struct hlist_head *h = &vlan->port->vlan_source_hash[i]; | |
1586 | struct macvlan_source_entry *entry; | |
1587 | ||
1588 | hlist_for_each_entry_rcu(entry, h, hlist) { | |
1589 | if (entry->vlan != vlan) | |
1590 | continue; | |
1591 | if (nla_put(skb, IFLA_MACVLAN_MACADDR, ETH_ALEN, entry->addr)) | |
1592 | return 1; | |
1593 | } | |
1594 | return 0; | |
1595 | } | |
1596 | ||
27c0b1a8 AB |
1597 | static int macvlan_fill_info(struct sk_buff *skb, |
1598 | const struct net_device *dev) | |
1599 | { | |
1600 | struct macvlan_dev *vlan = netdev_priv(dev); | |
79cf79ab MB |
1601 | int i; |
1602 | struct nlattr *nest; | |
27c0b1a8 | 1603 | |
ead9a76c DM |
1604 | if (nla_put_u32(skb, IFLA_MACVLAN_MODE, vlan->mode)) |
1605 | goto nla_put_failure; | |
df8ef8f3 JF |
1606 | if (nla_put_u16(skb, IFLA_MACVLAN_FLAGS, vlan->flags)) |
1607 | goto nla_put_failure; | |
79cf79ab MB |
1608 | if (nla_put_u32(skb, IFLA_MACVLAN_MACADDR_COUNT, vlan->macaddr_count)) |
1609 | goto nla_put_failure; | |
1610 | if (vlan->macaddr_count > 0) { | |
ae0be8de | 1611 | nest = nla_nest_start_noflag(skb, IFLA_MACVLAN_MACADDR_DATA); |
79cf79ab MB |
1612 | if (nest == NULL) |
1613 | goto nla_put_failure; | |
1614 | ||
1615 | for (i = 0; i < MACVLAN_HASH_SIZE; i++) { | |
1616 | if (macvlan_fill_info_macaddr(skb, vlan, i)) | |
1617 | goto nla_put_failure; | |
1618 | } | |
1619 | nla_nest_end(skb, nest); | |
1620 | } | |
27c0b1a8 AB |
1621 | return 0; |
1622 | ||
1623 | nla_put_failure: | |
1624 | return -EMSGSIZE; | |
1625 | } | |
1626 | ||
1627 | static const struct nla_policy macvlan_policy[IFLA_MACVLAN_MAX + 1] = { | |
df8ef8f3 JF |
1628 | [IFLA_MACVLAN_MODE] = { .type = NLA_U32 }, |
1629 | [IFLA_MACVLAN_FLAGS] = { .type = NLA_U16 }, | |
79cf79ab MB |
1630 | [IFLA_MACVLAN_MACADDR_MODE] = { .type = NLA_U32 }, |
1631 | [IFLA_MACVLAN_MACADDR] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN }, | |
1632 | [IFLA_MACVLAN_MACADDR_DATA] = { .type = NLA_NESTED }, | |
1633 | [IFLA_MACVLAN_MACADDR_COUNT] = { .type = NLA_U32 }, | |
27c0b1a8 AB |
1634 | }; |
1635 | ||
fc0663d6 AB |
1636 | int macvlan_link_register(struct rtnl_link_ops *ops) |
1637 | { | |
1638 | /* common fields */ | |
fc0663d6 AB |
1639 | ops->validate = macvlan_validate; |
1640 | ops->maxtype = IFLA_MACVLAN_MAX; | |
1641 | ops->policy = macvlan_policy; | |
1642 | ops->changelink = macvlan_changelink; | |
1643 | ops->get_size = macvlan_get_size; | |
1644 | ops->fill_info = macvlan_fill_info; | |
1645 | ||
1646 | return rtnl_link_register(ops); | |
1647 | }; | |
1648 | EXPORT_SYMBOL_GPL(macvlan_link_register); | |
1649 | ||
eaca400f ND |
1650 | static struct net *macvlan_get_link_net(const struct net_device *dev) |
1651 | { | |
1652 | return dev_net(macvlan_dev_real_dev(dev)); | |
1653 | } | |
1654 | ||
fc0663d6 | 1655 | static struct rtnl_link_ops macvlan_link_ops = { |
b863ceb7 | 1656 | .kind = "macvlan", |
8a35747a | 1657 | .setup = macvlan_setup, |
b863ceb7 PM |
1658 | .newlink = macvlan_newlink, |
1659 | .dellink = macvlan_dellink, | |
eaca400f | 1660 | .get_link_net = macvlan_get_link_net, |
6fe3faf8 | 1661 | .priv_size = sizeof(struct macvlan_dev), |
b863ceb7 PM |
1662 | }; |
1663 | ||
1664 | static int macvlan_device_event(struct notifier_block *unused, | |
1665 | unsigned long event, void *ptr) | |
1666 | { | |
351638e7 | 1667 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); |
b863ceb7 PM |
1668 | struct macvlan_dev *vlan, *next; |
1669 | struct macvlan_port *port; | |
226bd341 | 1670 | LIST_HEAD(list_kill); |
b863ceb7 | 1671 | |
913564fb | 1672 | if (!netif_is_macvlan_port(dev)) |
b863ceb7 PM |
1673 | return NOTIFY_DONE; |
1674 | ||
e052f7e6 | 1675 | port = macvlan_port_get_rtnl(dev); |
a35e2c1b | 1676 | |
b863ceb7 | 1677 | switch (event) { |
de7d244d | 1678 | case NETDEV_UP: |
80fd2d6c | 1679 | case NETDEV_DOWN: |
b863ceb7 PM |
1680 | case NETDEV_CHANGE: |
1681 | list_for_each_entry(vlan, &port->vlans, list) | |
fc4a7489 PM |
1682 | netif_stacked_transfer_operstate(vlan->lowerdev, |
1683 | vlan->dev); | |
b863ceb7 PM |
1684 | break; |
1685 | case NETDEV_FEAT_CHANGE: | |
1686 | list_for_each_entry(vlan, &port->vlans, list) { | |
8c2acc53 | 1687 | vlan->dev->gso_max_size = dev->gso_max_size; |
f6773c5e | 1688 | vlan->dev->gso_max_segs = dev->gso_max_segs; |
797f87f8 | 1689 | netdev_update_features(vlan->dev); |
b863ceb7 PM |
1690 | } |
1691 | break; | |
3763e7ef | 1692 | case NETDEV_CHANGEMTU: |
1693 | list_for_each_entry(vlan, &port->vlans, list) { | |
1694 | if (vlan->dev->mtu <= dev->mtu) | |
1695 | continue; | |
1696 | dev_set_mtu(vlan->dev, dev->mtu); | |
1697 | } | |
e289fd28 | 1698 | break; |
1699 | case NETDEV_CHANGEADDR: | |
43c2d578 | 1700 | if (!macvlan_passthru(port)) |
e289fd28 | 1701 | return NOTIFY_DONE; |
1702 | ||
1703 | vlan = list_first_entry_or_null(&port->vlans, | |
1704 | struct macvlan_dev, | |
1705 | list); | |
1706 | ||
1707 | if (macvlan_sync_address(vlan->dev, dev->dev_addr)) | |
1708 | return NOTIFY_BAD; | |
1709 | ||
3763e7ef | 1710 | break; |
b863ceb7 | 1711 | case NETDEV_UNREGISTER: |
3b27e105 DL |
1712 | /* twiddle thumbs on netns device moves */ |
1713 | if (dev->reg_state != NETREG_UNREGISTERING) | |
1714 | break; | |
1715 | ||
b863ceb7 | 1716 | list_for_each_entry_safe(vlan, next, &port->vlans, list) |
226bd341 ED |
1717 | vlan->dev->rtnl_link_ops->dellink(vlan->dev, &list_kill); |
1718 | unregister_netdevice_many(&list_kill); | |
b863ceb7 | 1719 | break; |
1c01fe14 JP |
1720 | case NETDEV_PRE_TYPE_CHANGE: |
1721 | /* Forbid underlaying device to change its type. */ | |
1722 | return NOTIFY_BAD; | |
4c991255 VY |
1723 | |
1724 | case NETDEV_NOTIFY_PEERS: | |
1725 | case NETDEV_BONDING_FAILOVER: | |
1726 | case NETDEV_RESEND_IGMP: | |
1727 | /* Propagate to all vlans */ | |
1728 | list_for_each_entry(vlan, &port->vlans, list) | |
1729 | call_netdevice_notifiers(event, vlan->dev); | |
b863ceb7 PM |
1730 | } |
1731 | return NOTIFY_DONE; | |
1732 | } | |
1733 | ||
1734 | static struct notifier_block macvlan_notifier_block __read_mostly = { | |
1735 | .notifier_call = macvlan_device_event, | |
1736 | }; | |
1737 | ||
1738 | static int __init macvlan_init_module(void) | |
1739 | { | |
1740 | int err; | |
1741 | ||
1742 | register_netdevice_notifier(&macvlan_notifier_block); | |
b863ceb7 | 1743 | |
fc0663d6 | 1744 | err = macvlan_link_register(&macvlan_link_ops); |
b863ceb7 PM |
1745 | if (err < 0) |
1746 | goto err1; | |
1747 | return 0; | |
1748 | err1: | |
b863ceb7 PM |
1749 | unregister_netdevice_notifier(&macvlan_notifier_block); |
1750 | return err; | |
1751 | } | |
1752 | ||
1753 | static void __exit macvlan_cleanup_module(void) | |
1754 | { | |
1755 | rtnl_link_unregister(&macvlan_link_ops); | |
b863ceb7 PM |
1756 | unregister_netdevice_notifier(&macvlan_notifier_block); |
1757 | } | |
1758 | ||
1759 | module_init(macvlan_init_module); | |
1760 | module_exit(macvlan_cleanup_module); | |
1761 | ||
1762 | MODULE_LICENSE("GPL"); | |
1763 | MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>"); | |
1764 | MODULE_DESCRIPTION("Driver for MAC address based VLANs"); | |
1765 | MODULE_ALIAS_RTNL_LINK("macvlan"); |